Commit | Line | Data |
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4588ec20 | 1 | /* Updating of data structures for redisplay. |
0b5538bd TTN |
2 | Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, |
3 | 1997, 1998, 1999, 2000, 2001, 2002, 2003, | |
114f9c96 | 4 | 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. |
4588ec20 JB |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
9ec0b715 | 8 | GNU Emacs is free software: you can redistribute it and/or modify |
4588ec20 | 9 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
10 | the Free Software Foundation, either version 3 of the License, or |
11 | (at your option) any later version. | |
4588ec20 JB |
12 | |
13 | GNU Emacs is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
4588ec20 | 20 | |
18160b98 | 21 | #include <config.h> |
68c45bf0 | 22 | #include <signal.h> |
565620a5 | 23 | #include <stdio.h> |
4588ec20 | 24 | #include <ctype.h> |
d7306fe6 | 25 | #include <setjmp.h> |
4588ec20 | 26 | |
dfcf069d AS |
27 | #ifdef HAVE_UNISTD_H |
28 | #include <unistd.h> | |
29 | #endif | |
30 | ||
47099d6f | 31 | #include "lisp.h" |
4588ec20 JB |
32 | #include "termchar.h" |
33 | #include "termopts.h" | |
a0879520 | 34 | /* cm.h must come after dispextern.h on Windows. */ |
fd2e066a GV |
35 | #include "dispextern.h" |
36 | #include "cm.h" | |
4588ec20 | 37 | #include "buffer.h" |
83be827a | 38 | #include "character.h" |
d43721a2 | 39 | #include "keyboard.h" |
502b9b64 | 40 | #include "frame.h" |
428a555e | 41 | #include "termhooks.h" |
4588ec20 JB |
42 | #include "window.h" |
43 | #include "commands.h" | |
44 | #include "disptab.h" | |
45 | #include "indent.h" | |
d169fe39 | 46 | #include "intervals.h" |
97cf50e7 | 47 | #include "blockinput.h" |
dfcf069d | 48 | #include "process.h" |
4588ec20 | 49 | |
58b2bb63 | 50 | #include "syssignal.h" |
a41f8bed | 51 | |
4588ec20 JB |
52 | #ifdef HAVE_X_WINDOWS |
53 | #include "xterm.h" | |
5f5c8ee5 | 54 | #endif /* HAVE_X_WINDOWS */ |
4588ec20 | 55 | |
fd2e066a GV |
56 | #ifdef HAVE_NTGUI |
57 | #include "w32term.h" | |
58 | #endif /* HAVE_NTGUI */ | |
59 | ||
edfda783 AR |
60 | #ifdef HAVE_NS |
61 | #include "nsterm.h" | |
62 | #endif | |
63 | ||
5f5c8ee5 | 64 | /* Include systime.h after xterm.h to avoid double inclusion of time.h. */ |
6cbd1643 | 65 | |
5f5c8ee5 | 66 | #include "systime.h" |
3883a901 RS |
67 | #include <errno.h> |
68 | ||
5f5c8ee5 GM |
69 | /* To get the prototype for `sleep'. */ |
70 | ||
71 | #ifdef HAVE_UNISTD_H | |
72 | #include <unistd.h> | |
73 | #endif | |
74 | ||
4588ec20 | 75 | /* Get number of chars of output now in the buffer of a stdio stream. |
5f5c8ee5 GM |
76 | This ought to be built in in stdio, but it isn't. Some s- files |
77 | override this because their stdio internals differ. */ | |
78 | ||
e3271ae5 | 79 | #ifdef __GNU_LIBRARY__ |
5f5c8ee5 GM |
80 | |
81 | /* The s- file might have overridden the definition with one that | |
82 | works for the system's C library. But we are using the GNU C | |
83 | library, so this is the right definition for every system. */ | |
84 | ||
3883a901 RS |
85 | #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT |
86 | #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT | |
87 | #else | |
cb5558ff | 88 | #undef PENDING_OUTPUT_COUNT |
e3271ae5 | 89 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer) |
3883a901 RS |
90 | #endif |
91 | #else /* not __GNU_LIBRARY__ */ | |
68c45bf0 PE |
92 | #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING |
93 | #include <stdio_ext.h> | |
94 | #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE) | |
95 | #endif | |
cb5558ff | 96 | #ifndef PENDING_OUTPUT_COUNT |
4588ec20 JB |
97 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) |
98 | #endif | |
5f5c8ee5 GM |
99 | #endif /* not __GNU_LIBRARY__ */ |
100 | ||
8a2a6032 | 101 | #if defined(HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES) |
fa0ec9f4 DL |
102 | #include <term.h> /* for tgetent */ |
103 | #endif | |
5f5c8ee5 GM |
104 | \f |
105 | /* Structure to pass dimensions around. Used for character bounding | |
106 | boxes, glyph matrix dimensions and alike. */ | |
107 | ||
108 | struct dim | |
109 | { | |
110 | int width; | |
111 | int height; | |
112 | }; | |
113 | ||
114 | \f | |
115 | /* Function prototypes. */ | |
116 | ||
f57e2426 J |
117 | static struct glyph_matrix *save_current_matrix (struct frame *); |
118 | static void restore_current_matrix (struct frame *, struct glyph_matrix *); | |
119 | static int showing_window_margins_p (struct window *); | |
120 | static void fake_current_matrices (Lisp_Object); | |
121 | static void redraw_overlapping_rows (struct window *, int); | |
122 | static void redraw_overlapped_rows (struct window *, int); | |
123 | static int count_blanks (struct glyph *, int); | |
124 | static int count_match (struct glyph *, struct glyph *, | |
125 | struct glyph *, struct glyph *); | |
126 | static unsigned line_draw_cost (struct glyph_matrix *, int); | |
127 | static void update_frame_line (struct frame *, int); | |
5f5c8ee5 | 128 | static struct dim allocate_matrices_for_frame_redisplay |
f57e2426 J |
129 | (Lisp_Object, int, int, int, int *); |
130 | static void allocate_matrices_for_window_redisplay (struct window *); | |
131 | static int realloc_glyph_pool (struct glyph_pool *, struct dim); | |
132 | static void adjust_frame_glyphs (struct frame *); | |
133 | struct glyph_matrix *new_glyph_matrix (struct glyph_pool *); | |
134 | static void free_glyph_matrix (struct glyph_matrix *); | |
135 | static void adjust_glyph_matrix (struct window *, struct glyph_matrix *, | |
136 | int, int, struct dim); | |
137 | static void change_frame_size_1 (struct frame *, int, int, int, int, int); | |
138 | static void swap_glyph_pointers (struct glyph_row *, struct glyph_row *); | |
f1d2ce7f | 139 | #if GLYPH_DEBUG |
f57e2426 | 140 | static int glyph_row_slice_p (struct glyph_row *, struct glyph_row *); |
9339e87f | 141 | #endif |
f57e2426 J |
142 | static void fill_up_frame_row_with_spaces (struct glyph_row *, int); |
143 | static void build_frame_matrix_from_window_tree (struct glyph_matrix *, | |
144 | struct window *); | |
145 | static void build_frame_matrix_from_leaf_window (struct glyph_matrix *, | |
146 | struct window *); | |
147 | static struct glyph_pool *new_glyph_pool (void); | |
148 | static void free_glyph_pool (struct glyph_pool *); | |
149 | static void adjust_frame_glyphs_initially (void); | |
150 | static void adjust_frame_message_buffer (struct frame *); | |
151 | static void adjust_decode_mode_spec_buffer (struct frame *); | |
152 | static void fill_up_glyph_row_with_spaces (struct glyph_row *); | |
153 | static void build_frame_matrix (struct frame *); | |
154 | void clear_current_matrices (struct frame *); | |
155 | void scroll_glyph_matrix_range (struct glyph_matrix *, int, int, | |
156 | int, int); | |
157 | static void clear_window_matrices (struct window *, int); | |
158 | static void fill_up_glyph_row_area_with_spaces (struct glyph_row *, int); | |
159 | static int scrolling_window (struct window *, int); | |
160 | static int update_window_line (struct window *, int, int *); | |
161 | static void update_marginal_area (struct window *, int, int); | |
162 | static int update_text_area (struct window *, int); | |
163 | static void make_current (struct glyph_matrix *, struct glyph_matrix *, | |
164 | int); | |
165 | static void mirror_make_current (struct window *, int); | |
166 | void check_window_matrix_pointers (struct window *); | |
b96fd3e8 | 167 | #if GLYPH_DEBUG |
f57e2426 J |
168 | static void check_matrix_pointers (struct glyph_matrix *, |
169 | struct glyph_matrix *); | |
b96fd3e8 | 170 | #endif |
f57e2426 J |
171 | static void mirror_line_dance (struct window *, int, int, int *, char *); |
172 | static int update_window_tree (struct window *, int); | |
173 | static int update_window (struct window *, int); | |
174 | static int update_frame_1 (struct frame *, int, int); | |
175 | static void set_window_cursor_after_update (struct window *); | |
176 | static int row_equal_p (struct window *, struct glyph_row *, | |
177 | struct glyph_row *, int); | |
178 | static void adjust_frame_glyphs_for_window_redisplay (struct frame *); | |
179 | static void adjust_frame_glyphs_for_frame_redisplay (struct frame *); | |
180 | static void reverse_rows (struct glyph_matrix *, int, int); | |
181 | static int margin_glyphs_to_reserve (struct window *, int, Lisp_Object); | |
182 | static void sync_window_with_frame_matrix_rows (struct window *); | |
183 | struct window *frame_row_to_window (struct window *, int); | |
5f5c8ee5 | 184 | |
5f5c8ee5 GM |
185 | \f |
186 | /* Non-zero means don't pause redisplay for pending input. (This is | |
187 | for debugging and for a future implementation of EDT-like | |
188 | scrolling. */ | |
4588ec20 | 189 | |
5f5c8ee5 | 190 | int redisplay_dont_pause; |
45140e01 | 191 | |
d012c62b KS |
192 | /* Define PERIODIC_PREEMPTION_CHECKING to 1, if micro-second timers |
193 | are supported, so we can check for input during redisplay at | |
194 | regular intervals. */ | |
195 | #ifdef EMACS_HAS_USECS | |
196 | #define PERIODIC_PREEMPTION_CHECKING 1 | |
197 | #else | |
198 | #define PERIODIC_PREEMPTION_CHECKING 0 | |
199 | #endif | |
200 | ||
201 | #if PERIODIC_PREEMPTION_CHECKING | |
202 | ||
203 | /* If a number (float), check for user input every N seconds. */ | |
204 | ||
205 | Lisp_Object Vredisplay_preemption_period; | |
206 | ||
207 | /* Redisplay preemption timers. */ | |
208 | ||
209 | static EMACS_TIME preemption_period; | |
210 | static EMACS_TIME preemption_next_check; | |
211 | ||
212 | #endif | |
213 | ||
a41f8bed | 214 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 215 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 216 | |
502b9b64 | 217 | int frame_garbaged; |
4588ec20 | 218 | |
5f5c8ee5 | 219 | /* Nonzero means last display completed. Zero means it was preempted. */ |
4588ec20 JB |
220 | |
221 | int display_completed; | |
222 | ||
5f5c8ee5 GM |
223 | /* Lisp variable visible-bell; enables use of screen-flash instead of |
224 | audible bell. */ | |
4588ec20 JB |
225 | |
226 | int visible_bell; | |
227 | ||
502b9b64 | 228 | /* Invert the color of the whole frame, at a low level. */ |
4588ec20 JB |
229 | |
230 | int inverse_video; | |
231 | ||
232 | /* Line speed of the terminal. */ | |
233 | ||
31ade731 | 234 | EMACS_INT baud_rate; |
4588ec20 | 235 | |
5f5c8ee5 | 236 | /* Either nil or a symbol naming the window system under which Emacs |
2246281f | 237 | creates the first frame. */ |
4588ec20 | 238 | |
2246281f | 239 | Lisp_Object Vinitial_window_system; |
4588ec20 JB |
240 | |
241 | /* Version number of X windows: 10, 11 or nil. */ | |
5f5c8ee5 | 242 | |
4588ec20 JB |
243 | Lisp_Object Vwindow_system_version; |
244 | ||
5f5c8ee5 GM |
245 | /* Vector of glyph definitions. Indexed by glyph number, the contents |
246 | are a string which is how to output the glyph. | |
4588ec20 JB |
247 | |
248 | If Vglyph_table is nil, a glyph is output by using its low 8 bits | |
5f5c8ee5 GM |
249 | as a character code. |
250 | ||
251 | This is an obsolete feature that is no longer used. The variable | |
252 | is retained for compatibility. */ | |
4588ec20 JB |
253 | |
254 | Lisp_Object Vglyph_table; | |
255 | ||
256 | /* Display table to use for vectors that don't specify their own. */ | |
257 | ||
258 | Lisp_Object Vstandard_display_table; | |
259 | ||
5f5c8ee5 | 260 | /* Nonzero means reading single-character input with prompt so put |
153a073c | 261 | cursor on mini-buffer after the prompt. Positive means at end of |
5f5c8ee5 GM |
262 | text in echo area; negative means at beginning of line. */ |
263 | ||
4588ec20 | 264 | int cursor_in_echo_area; |
9cda4f7c | 265 | |
e7067d00 | 266 | Lisp_Object Qdisplay_table, Qredisplay_dont_pause; |
5f5c8ee5 | 267 | |
4588ec20 | 268 | \f |
5f5c8ee5 | 269 | /* The currently selected frame. In a single-frame version, this |
91fb7e1b | 270 | variable always equals the_only_frame. */ |
4588ec20 | 271 | |
91fb7e1b | 272 | Lisp_Object selected_frame; |
4588ec20 | 273 | |
5f5c8ee5 | 274 | /* A frame which is not just a mini-buffer, or 0 if there are no such |
502b9b64 | 275 | frames. This is usually the most recent such frame that was |
87485d6f MW |
276 | selected. In a single-frame version, this variable always holds |
277 | the address of the_only_frame. */ | |
4588ec20 | 278 | |
5f5c8ee5 | 279 | struct frame *last_nonminibuf_frame; |
d52bad65 | 280 | |
5f5c8ee5 | 281 | /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 282 | |
5f5c8ee5 | 283 | int delayed_size_change; |
4588ec20 | 284 | |
5f5c8ee5 | 285 | /* 1 means glyph initialization has been completed at startup. */ |
4588ec20 | 286 | |
5f5c8ee5 | 287 | static int glyphs_initialized_initially_p; |
4588ec20 | 288 | |
5f5c8ee5 | 289 | /* Updated window if != 0. Set by update_window. */ |
4588ec20 | 290 | |
5f5c8ee5 | 291 | struct window *updated_window; |
4588ec20 | 292 | |
5f5c8ee5 | 293 | /* Glyph row updated in update_window_line, and area that is updated. */ |
4588ec20 | 294 | |
5f5c8ee5 GM |
295 | struct glyph_row *updated_row; |
296 | int updated_area; | |
4588ec20 | 297 | |
5f5c8ee5 | 298 | /* A glyph for a space. */ |
4588ec20 | 299 | |
5f5c8ee5 | 300 | struct glyph space_glyph; |
4588ec20 | 301 | |
5f5c8ee5 GM |
302 | /* Counts of allocated structures. These counts serve to diagnose |
303 | memory leaks and double frees. */ | |
4588ec20 | 304 | |
5f5c8ee5 GM |
305 | int glyph_matrix_count; |
306 | int glyph_pool_count; | |
4588ec20 | 307 | |
5f5c8ee5 GM |
308 | /* If non-null, the frame whose frame matrices are manipulated. If |
309 | null, window matrices are worked on. */ | |
4588ec20 | 310 | |
5f5c8ee5 | 311 | static struct frame *frame_matrix_frame; |
4588ec20 | 312 | |
5f5c8ee5 GM |
313 | /* Non-zero means that fonts have been loaded since the last glyph |
314 | matrix adjustments. Redisplay must stop, and glyph matrices must | |
315 | be adjusted when this flag becomes non-zero during display. The | |
316 | reason fonts can be loaded so late is that fonts of fontsets are | |
3aa9f0c4 KH |
317 | loaded on demand. Another reason is that a line contains many |
318 | characters displayed by zero width or very narrow glyphs of | |
319 | variable-width fonts. */ | |
836d2cde | 320 | |
5f5c8ee5 | 321 | int fonts_changed_p; |
836d2cde | 322 | |
177c0ea7 | 323 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 324 | This may only be used for terminal frames. */ |
836d2cde | 325 | |
5f5c8ee5 | 326 | #if GLYPH_DEBUG |
4588ec20 | 327 | |
f57e2426 J |
328 | static int window_to_frame_vpos (struct window *, int); |
329 | static int window_to_frame_hpos (struct window *, int); | |
5f5c8ee5 GM |
330 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) |
331 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 332 | |
9b0e97aa GM |
333 | /* One element of the ring buffer containing redisplay history |
334 | information. */ | |
335 | ||
336 | struct redisplay_history | |
337 | { | |
338 | char trace[512 + 100]; | |
339 | }; | |
340 | ||
341 | /* The size of the history buffer. */ | |
342 | ||
343 | #define REDISPLAY_HISTORY_SIZE 30 | |
344 | ||
345 | /* The redisplay history buffer. */ | |
346 | ||
347 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
348 | ||
349 | /* Next free entry in redisplay_history. */ | |
350 | ||
351 | static int history_idx; | |
352 | ||
353 | /* A tick that's incremented each time something is added to the | |
354 | history. */ | |
355 | ||
356 | static unsigned history_tick; | |
357 | ||
f57e2426 J |
358 | static void add_frame_display_history (struct frame *, int); |
359 | static void add_window_display_history (struct window *, char *, int); | |
6a8aec41 | 360 | \f |
9b0e97aa GM |
361 | /* Add to the redisplay history how window W has been displayed. |
362 | MSG is a trace containing the information how W's glyph matrix | |
153a073c | 363 | has been constructed. PAUSED_P non-zero means that the update |
9b0e97aa GM |
364 | has been interrupted for pending input. */ |
365 | ||
366 | static void | |
367 | add_window_display_history (w, msg, paused_p) | |
368 | struct window *w; | |
369 | char *msg; | |
370 | int paused_p; | |
371 | { | |
372 | char *buf; | |
177c0ea7 | 373 | |
9b0e97aa GM |
374 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
375 | history_idx = 0; | |
376 | buf = redisplay_history[history_idx].trace; | |
377 | ++history_idx; | |
177c0ea7 | 378 | |
9b0e97aa GM |
379 | sprintf (buf, "%d: window %p (`%s')%s\n", |
380 | history_tick++, | |
381 | w, | |
382 | ((BUFFERP (w->buffer) | |
383 | && STRINGP (XBUFFER (w->buffer)->name)) | |
d5db4077 | 384 | ? (char *) SDATA (XBUFFER (w->buffer)->name) |
9b0e97aa GM |
385 | : "???"), |
386 | paused_p ? " ***paused***" : ""); | |
387 | strcat (buf, msg); | |
388 | } | |
389 | ||
390 | ||
391 | /* Add to the redisplay history that frame F has been displayed. | |
392 | PAUSED_P non-zero means that the update has been interrupted for | |
393 | pending input. */ | |
394 | ||
395 | static void | |
396 | add_frame_display_history (f, paused_p) | |
397 | struct frame *f; | |
398 | int paused_p; | |
399 | { | |
400 | char *buf; | |
177c0ea7 | 401 | |
9b0e97aa GM |
402 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
403 | history_idx = 0; | |
404 | buf = redisplay_history[history_idx].trace; | |
405 | ++history_idx; | |
177c0ea7 | 406 | |
9b0e97aa GM |
407 | sprintf (buf, "%d: update frame %p%s", |
408 | history_tick++, | |
409 | f, paused_p ? " ***paused***" : ""); | |
410 | } | |
411 | ||
412 | ||
413 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, | |
414 | Sdump_redisplay_history, 0, 0, "", | |
7ee72033 MB |
415 | doc: /* Dump redisplay history to stderr. */) |
416 | () | |
9b0e97aa GM |
417 | { |
418 | int i; | |
419 | ||
420 | for (i = history_idx - 1; i != history_idx; --i) | |
421 | { | |
422 | if (i < 0) | |
423 | i = REDISPLAY_HISTORY_SIZE - 1; | |
424 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
425 | } | |
426 | ||
427 | return Qnil; | |
428 | } | |
429 | ||
430 | ||
5f5c8ee5 | 431 | #else /* GLYPH_DEBUG == 0 */ |
4588ec20 | 432 | |
7df02016 KS |
433 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
434 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 435 | |
5f5c8ee5 | 436 | #endif /* GLYPH_DEBUG == 0 */ |
4588ec20 | 437 | |
4588ec20 | 438 | |
72af86bd AS |
439 | #ifdef PROFILING |
440 | /* FIXME: only used to find text start for profiling. */ | |
4588ec20 JB |
441 | |
442 | void | |
971de7fb | 443 | safe_bcopy (const char *from, char *to, int size) |
4588ec20 | 444 | { |
72af86bd | 445 | abort (); |
177c0ea7 | 446 | } |
72af86bd | 447 | #endif |
5f5c8ee5 GM |
448 | \f |
449 | /*********************************************************************** | |
450 | Glyph Matrices | |
451 | ***********************************************************************/ | |
452 | ||
453 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
454 | pool from which memory for the matrix should be allocated, or null | |
455 | for window-based redisplay where no glyph pools are used. The | |
456 | member `pool' of the glyph matrix structure returned is set to | |
457 | POOL, the structure is otherwise zeroed. */ | |
458 | ||
459 | struct glyph_matrix * | |
971de7fb | 460 | new_glyph_matrix (struct glyph_pool *pool) |
4588ec20 | 461 | { |
5f5c8ee5 GM |
462 | struct glyph_matrix *result; |
463 | ||
464 | /* Allocate and clear. */ | |
465 | result = (struct glyph_matrix *) xmalloc (sizeof *result); | |
72af86bd | 466 | memset (result, 0, sizeof *result); |
4588ec20 | 467 | |
5f5c8ee5 GM |
468 | /* Increment number of allocated matrices. This count is used |
469 | to detect memory leaks. */ | |
470 | ++glyph_matrix_count; | |
4588ec20 | 471 | |
5f5c8ee5 GM |
472 | /* Set pool and return. */ |
473 | result->pool = pool; | |
474 | return result; | |
4588ec20 JB |
475 | } |
476 | ||
4588ec20 | 477 | |
5f5c8ee5 GM |
478 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
479 | ||
480 | The global counter glyph_matrix_count is decremented when a matrix | |
481 | is freed. If the count gets negative, more structures were freed | |
482 | than allocated, i.e. one matrix was freed more than once or a bogus | |
483 | pointer was passed to this function. | |
177c0ea7 | 484 | |
5f5c8ee5 GM |
485 | If MATRIX->pool is null, this means that the matrix manages its own |
486 | glyph memory---this is done for matrices on X frames. Freeing the | |
487 | matrix also frees the glyph memory in this case. */ | |
488 | ||
489 | static void | |
971de7fb | 490 | free_glyph_matrix (struct glyph_matrix *matrix) |
4588ec20 | 491 | { |
5f5c8ee5 GM |
492 | if (matrix) |
493 | { | |
494 | int i; | |
495 | ||
496 | /* Detect the case that more matrices are freed than were | |
497 | allocated. */ | |
498 | if (--glyph_matrix_count < 0) | |
499 | abort (); | |
500 | ||
501 | /* Free glyph memory if MATRIX owns it. */ | |
502 | if (matrix->pool == NULL) | |
503 | for (i = 0; i < matrix->rows_allocated; ++i) | |
504 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 505 | |
5f5c8ee5 GM |
506 | /* Free row structures and the matrix itself. */ |
507 | xfree (matrix->rows); | |
508 | xfree (matrix); | |
509 | } | |
510 | } | |
4588ec20 | 511 | |
4588ec20 | 512 | |
5f5c8ee5 GM |
513 | /* Return the number of glyphs to reserve for a marginal area of |
514 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
515 | display line of window W. MARGIN gives the width of the marginal | |
516 | area in canonical character units. MARGIN should be an integer | |
517 | or a float. */ | |
518 | ||
519 | static int | |
971de7fb | 520 | margin_glyphs_to_reserve (struct window *w, int total_glyphs, Lisp_Object margin) |
5f5c8ee5 GM |
521 | { |
522 | int n; | |
4588ec20 | 523 | |
5f5c8ee5 | 524 | if (NUMBERP (margin)) |
4588ec20 | 525 | { |
7df02016 | 526 | int width = XFASTINT (w->total_cols); |
5f5c8ee5 GM |
527 | double d = max (0, XFLOATINT (margin)); |
528 | d = min (width / 2 - 1, d); | |
35ec832e | 529 | n = (int) ((double) total_glyphs / width * d); |
5f5c8ee5 GM |
530 | } |
531 | else | |
532 | n = 0; | |
533 | ||
534 | return n; | |
535 | } | |
536 | ||
4588ec20 | 537 | |
5f5c8ee5 GM |
538 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
539 | window sizes. | |
4588ec20 | 540 | |
5f5c8ee5 GM |
541 | W is null if the function is called for a frame glyph matrix. |
542 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
543 | indices of the first column and row of MATRIX within the frame | |
544 | matrix, if such a matrix exists. They are zero for purely | |
545 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 546 | |
5f5c8ee5 GM |
547 | In window-based redisplay, where no frame matrices exist, glyph |
548 | matrices manage their own glyph storage. Otherwise, they allocate | |
549 | storage from a common frame glyph pool which can be found in | |
550 | MATRIX->pool. | |
23b0200c | 551 | |
5f5c8ee5 GM |
552 | The reason for this memory management strategy is to avoid complete |
553 | frame redraws if possible. When we allocate from a common pool, a | |
554 | change of the location or size of a sub-matrix within the pool | |
555 | requires a complete redisplay of the frame because we cannot easily | |
556 | make sure that the current matrices of all windows still agree with | |
557 | what is displayed on the screen. While this is usually fast, it | |
558 | leads to screen flickering. */ | |
23b0200c | 559 | |
5f5c8ee5 | 560 | static void |
971de7fb | 561 | adjust_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int x, int y, struct dim dim) |
5f5c8ee5 GM |
562 | { |
563 | int i; | |
564 | int new_rows; | |
565 | int marginal_areas_changed_p = 0; | |
045dee35 GM |
566 | int header_line_changed_p = 0; |
567 | int header_line_p = 0; | |
5f5c8ee5 | 568 | int left = -1, right = -1; |
ca8a12a7 | 569 | int window_width = -1, window_height = -1; |
5f5c8ee5 | 570 | |
6b61353c KH |
571 | /* See if W had a header line that has disappeared now, or vice versa. |
572 | Get W's size. */ | |
5f5c8ee5 GM |
573 | if (w) |
574 | { | |
6b61353c KH |
575 | window_box (w, -1, 0, 0, &window_width, &window_height); |
576 | ||
045dee35 GM |
577 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
578 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 579 | } |
045dee35 | 580 | matrix->header_line_p = header_line_p; |
23b0200c | 581 | |
6b61353c KH |
582 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
583 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
584 | haven't changed. This optimization is important because preserving |
585 | the matrix means preventing redisplay. */ | |
586 | if (matrix->pool == NULL) | |
587 | { | |
7df02016 KS |
588 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
589 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
5f5c8ee5 GM |
590 | xassert (left >= 0 && right >= 0); |
591 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs | |
592 | || right != matrix->right_margin_glyphs); | |
593 | ||
594 | if (!marginal_areas_changed_p | |
595 | && !fonts_changed_p | |
045dee35 | 596 | && !header_line_changed_p |
7df02016 KS |
597 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
598 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
599 | && matrix->window_height == window_height |
600 | && matrix->window_vscroll == w->vscroll | |
601 | && matrix->window_width == window_width) | |
602 | return; | |
603 | } | |
177c0ea7 | 604 | |
5f5c8ee5 GM |
605 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
606 | if (matrix->rows_allocated < dim.height) | |
607 | { | |
608 | int size = dim.height * sizeof (struct glyph_row); | |
609 | new_rows = dim.height - matrix->rows_allocated; | |
610 | matrix->rows = (struct glyph_row *) xrealloc (matrix->rows, size); | |
72af86bd AS |
611 | memset (matrix->rows + matrix->rows_allocated, 0, |
612 | new_rows * sizeof *matrix->rows); | |
5f5c8ee5 GM |
613 | matrix->rows_allocated = dim.height; |
614 | } | |
615 | else | |
616 | new_rows = 0; | |
60a8948a | 617 | |
5f5c8ee5 GM |
618 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
619 | on a frame not using window-based redisplay. Set up pointers for | |
620 | each row into the glyph pool. */ | |
621 | if (matrix->pool) | |
622 | { | |
623 | xassert (matrix->pool->glyphs); | |
177c0ea7 | 624 | |
5f5c8ee5 | 625 | if (w) |
60a8948a | 626 | { |
5f5c8ee5 | 627 | left = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 628 | w->left_margin_cols); |
5f5c8ee5 | 629 | right = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 630 | w->right_margin_cols); |
60a8948a | 631 | } |
5f5c8ee5 GM |
632 | else |
633 | left = right = 0; | |
177c0ea7 | 634 | |
5f5c8ee5 | 635 | for (i = 0; i < dim.height; ++i) |
60a8948a | 636 | { |
5f5c8ee5 | 637 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
638 | |
639 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
640 | = (matrix->pool->glyphs |
641 | + (y + i) * matrix->pool->ncolumns | |
642 | + x); | |
177c0ea7 | 643 | |
5f5c8ee5 GM |
644 | if (w == NULL |
645 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 646 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
647 | { |
648 | row->glyphs[TEXT_AREA] | |
649 | = row->glyphs[LEFT_MARGIN_AREA]; | |
650 | row->glyphs[RIGHT_MARGIN_AREA] | |
651 | = row->glyphs[TEXT_AREA] + dim.width; | |
652 | row->glyphs[LAST_AREA] | |
653 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
654 | } | |
655 | else | |
656 | { | |
657 | row->glyphs[TEXT_AREA] | |
658 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
659 | row->glyphs[RIGHT_MARGIN_AREA] | |
660 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
661 | row->glyphs[LAST_AREA] | |
662 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
663 | } | |
60a8948a | 664 | } |
177c0ea7 | 665 | |
5f5c8ee5 GM |
666 | matrix->left_margin_glyphs = left; |
667 | matrix->right_margin_glyphs = right; | |
668 | } | |
669 | else | |
670 | { | |
671 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
6b61353c KH |
672 | its own memory. It is a window matrix for window-based redisplay. |
673 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
674 | if (dim.width > matrix->matrix_w |
675 | || new_rows | |
045dee35 | 676 | || header_line_changed_p |
5f5c8ee5 | 677 | || marginal_areas_changed_p) |
4588ec20 | 678 | { |
5f5c8ee5 GM |
679 | struct glyph_row *row = matrix->rows; |
680 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 681 | |
5f5c8ee5 GM |
682 | while (row < end) |
683 | { | |
684 | row->glyphs[LEFT_MARGIN_AREA] | |
685 | = (struct glyph *) xrealloc (row->glyphs[LEFT_MARGIN_AREA], | |
686 | (dim.width | |
687 | * sizeof (struct glyph))); | |
177c0ea7 | 688 | |
5f5c8ee5 GM |
689 | /* The mode line never has marginal areas. */ |
690 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 691 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
692 | { |
693 | row->glyphs[TEXT_AREA] | |
694 | = row->glyphs[LEFT_MARGIN_AREA]; | |
695 | row->glyphs[RIGHT_MARGIN_AREA] | |
696 | = row->glyphs[TEXT_AREA] + dim.width; | |
697 | row->glyphs[LAST_AREA] | |
698 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
699 | } | |
700 | else | |
701 | { | |
702 | row->glyphs[TEXT_AREA] | |
703 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
704 | row->glyphs[RIGHT_MARGIN_AREA] | |
705 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
706 | row->glyphs[LAST_AREA] | |
707 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
708 | } | |
709 | ++row; | |
710 | } | |
4588ec20 JB |
711 | } |
712 | ||
5f5c8ee5 GM |
713 | xassert (left >= 0 && right >= 0); |
714 | matrix->left_margin_glyphs = left; | |
715 | matrix->right_margin_glyphs = right; | |
716 | } | |
177c0ea7 | 717 | |
5f5c8ee5 GM |
718 | /* Number of rows to be used by MATRIX. */ |
719 | matrix->nrows = dim.height; | |
3ed36514 | 720 | xassert (matrix->nrows >= 0); |
5f5c8ee5 | 721 | |
b7b20fbd | 722 | if (w) |
5f5c8ee5 | 723 | { |
b7b20fbd | 724 | if (matrix == w->current_matrix) |
4588ec20 | 725 | { |
b7b20fbd GM |
726 | /* Mark rows in a current matrix of a window as not having |
727 | valid contents. It's important to not do this for | |
728 | desired matrices. When Emacs starts, it may already be | |
729 | building desired matrices when this function runs. */ | |
730 | if (window_width < 0) | |
731 | window_width = window_box_width (w, -1); | |
177c0ea7 | 732 | |
b7b20fbd GM |
733 | /* Optimize the case that only the height has changed (C-x 2, |
734 | upper window). Invalidate all rows that are no longer part | |
735 | of the window. */ | |
736 | if (!marginal_areas_changed_p | |
73d75a62 GM |
737 | && !header_line_changed_p |
738 | && new_rows == 0 | |
739 | && dim.width == matrix->matrix_w | |
7df02016 KS |
740 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
741 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 742 | && matrix->window_width == window_width) |
b7b20fbd | 743 | { |
dd42b31a GM |
744 | /* Find the last row in the window. */ |
745 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
746 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
747 | { | |
26447967 | 748 | ++i; |
dd42b31a GM |
749 | break; |
750 | } | |
b7b20fbd GM |
751 | |
752 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 753 | are invalidated below. */ |
b7b20fbd GM |
754 | if (INTEGERP (w->window_end_vpos) |
755 | && XFASTINT (w->window_end_vpos) >= i) | |
756 | w->window_end_valid = Qnil; | |
177c0ea7 | 757 | |
b7b20fbd GM |
758 | while (i < matrix->nrows) |
759 | matrix->rows[i++].enabled_p = 0; | |
760 | } | |
761 | else | |
762 | { | |
763 | for (i = 0; i < matrix->nrows; ++i) | |
764 | matrix->rows[i].enabled_p = 0; | |
765 | } | |
5f5c8ee5 | 766 | } |
b7b20fbd | 767 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 768 | { |
b7b20fbd GM |
769 | /* Rows in desired matrices always have to be cleared; |
770 | redisplay expects this is the case when it runs, so it | |
771 | had better be the case when we adjust matrices between | |
772 | redisplays. */ | |
5f5c8ee5 GM |
773 | for (i = 0; i < matrix->nrows; ++i) |
774 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 775 | } |
4588ec20 | 776 | } |
177c0ea7 JB |
777 | |
778 | ||
5f5c8ee5 GM |
779 | /* Remember last values to be able to optimize frame redraws. */ |
780 | matrix->matrix_x = x; | |
781 | matrix->matrix_y = y; | |
782 | matrix->matrix_w = dim.width; | |
783 | matrix->matrix_h = dim.height; | |
784 | ||
785 | /* Record the top y location and height of W at the time the matrix | |
786 | was last adjusted. This is used to optimize redisplay above. */ | |
787 | if (w) | |
4588ec20 | 788 | { |
7df02016 KS |
789 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
790 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
791 | matrix->window_height = window_height; |
792 | matrix->window_width = window_width; | |
793 | matrix->window_vscroll = w->vscroll; | |
794 | } | |
795 | } | |
4588ec20 | 796 | |
4588ec20 | 797 | |
5f5c8ee5 GM |
798 | /* Reverse the contents of rows in MATRIX between START and END. The |
799 | contents of the row at END - 1 end up at START, END - 2 at START + | |
800 | 1 etc. This is part of the implementation of rotate_matrix (see | |
801 | below). */ | |
d52bad65 | 802 | |
5f5c8ee5 | 803 | static void |
971de7fb | 804 | reverse_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 GM |
805 | { |
806 | int i, j; | |
23b0200c | 807 | |
5f5c8ee5 GM |
808 | for (i = start, j = end - 1; i < j; ++i, --j) |
809 | { | |
810 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
811 | initialization. */ | |
812 | struct glyph_row temp; | |
813 | temp = matrix->rows[i]; | |
814 | matrix->rows[i] = matrix->rows[j]; | |
815 | matrix->rows[j] = temp; | |
816 | } | |
817 | } | |
23b0200c | 818 | |
23b0200c | 819 | |
5f5c8ee5 GM |
820 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
821 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
822 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
823 | row structures are moved around). | |
60a8948a | 824 | |
5f5c8ee5 GM |
825 | The algorithm used for rotating the vector was, I believe, first |
826 | described by Kernighan. See the vector R as consisting of two | |
827 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
828 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
829 | and reverse the result to get (ArBr)r which is BA. Similar for | |
830 | rotating right. */ | |
831 | ||
832 | void | |
971de7fb | 833 | rotate_matrix (struct glyph_matrix *matrix, int first, int last, int by) |
5f5c8ee5 GM |
834 | { |
835 | if (by < 0) | |
836 | { | |
837 | /* Up (rotate left, i.e. towards lower indices). */ | |
838 | by = -by; | |
839 | reverse_rows (matrix, first, first + by); | |
840 | reverse_rows (matrix, first + by, last); | |
841 | reverse_rows (matrix, first, last); | |
842 | } | |
843 | else if (by > 0) | |
844 | { | |
845 | /* Down (rotate right, i.e. towards higher indices). */ | |
846 | reverse_rows (matrix, last - by, last); | |
847 | reverse_rows (matrix, first, last - by); | |
848 | reverse_rows (matrix, first, last); | |
849 | } | |
850 | } | |
851 | ||
852 | ||
853 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
854 | with indices START <= index < END. Increment positions by DELTA/ | |
855 | DELTA_BYTES. */ | |
856 | ||
857 | void | |
971de7fb | 858 | increment_matrix_positions (struct glyph_matrix *matrix, int start, int end, int delta, int delta_bytes) |
5f5c8ee5 GM |
859 | { |
860 | /* Check that START and END are reasonable values. */ | |
861 | xassert (start >= 0 && start <= matrix->nrows); | |
862 | xassert (end >= 0 && end <= matrix->nrows); | |
863 | xassert (start <= end); | |
864 | ||
865 | for (; start < end; ++start) | |
86c11ba1 | 866 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
867 | } |
868 | ||
869 | ||
870 | /* Enable a range of rows in glyph matrix MATRIX. START and END are | |
871 | the row indices of the first and last + 1 row to enable. If | |
872 | ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */ | |
873 | ||
874 | void | |
971de7fb | 875 | enable_glyph_matrix_rows (struct glyph_matrix *matrix, int start, int end, int enabled_p) |
5f5c8ee5 | 876 | { |
3ed36514 GM |
877 | xassert (start <= end); |
878 | xassert (start >= 0 && start < matrix->nrows); | |
879 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 880 | |
5f5c8ee5 GM |
881 | for (; start < end; ++start) |
882 | matrix->rows[start].enabled_p = enabled_p != 0; | |
883 | } | |
884 | ||
885 | ||
886 | /* Clear MATRIX. | |
887 | ||
888 | This empties all rows in MATRIX by setting the enabled_p flag for | |
889 | all rows of the matrix to zero. The function prepare_desired_row | |
890 | will eventually really clear a row when it sees one with a zero | |
891 | enabled_p flag. | |
892 | ||
893 | Resets update hints to defaults value. The only update hint | |
894 | currently present is the flag MATRIX->no_scrolling_p. */ | |
895 | ||
896 | void | |
971de7fb | 897 | clear_glyph_matrix (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
898 | { |
899 | if (matrix) | |
900 | { | |
901 | enable_glyph_matrix_rows (matrix, 0, matrix->nrows, 0); | |
902 | matrix->no_scrolling_p = 0; | |
903 | } | |
904 | } | |
177c0ea7 | 905 | |
5f5c8ee5 GM |
906 | |
907 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
908 | Increment y-positions in glyph rows between START and END by DY, | |
909 | and recompute their visible height. */ | |
910 | ||
911 | void | |
971de7fb | 912 | shift_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int start, int end, int dy) |
5f5c8ee5 GM |
913 | { |
914 | int min_y, max_y; | |
177c0ea7 | 915 | |
5f5c8ee5 GM |
916 | xassert (start <= end); |
917 | xassert (start >= 0 && start < matrix->nrows); | |
918 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 919 | |
7df02016 KS |
920 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
921 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 922 | |
5f5c8ee5 GM |
923 | for (; start < end; ++start) |
924 | { | |
925 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 926 | |
5f5c8ee5 | 927 | row->y += dy; |
d6c747a4 | 928 | row->visible_height = row->height; |
177c0ea7 | 929 | |
5f5c8ee5 | 930 | if (row->y < min_y) |
d6c747a4 GM |
931 | row->visible_height -= min_y - row->y; |
932 | if (row->y + row->height > max_y) | |
933 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
934 | } |
935 | } | |
936 | ||
937 | ||
938 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
939 | invalid is done by setting enabled_p to zero for all rows in a | |
940 | current matrix. */ | |
941 | ||
942 | void | |
971de7fb | 943 | clear_current_matrices (register struct frame *f) |
5f5c8ee5 GM |
944 | { |
945 | /* Clear frame current matrix, if we have one. */ | |
946 | if (f->current_matrix) | |
947 | clear_glyph_matrix (f->current_matrix); | |
948 | ||
949 | /* Clear the matrix of the menu bar window, if such a window exists. | |
950 | The menu bar window is currently used to display menus on X when | |
951 | no toolkit support is compiled in. */ | |
952 | if (WINDOWP (f->menu_bar_window)) | |
953 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
954 | ||
9ea173e8 GM |
955 | /* Clear the matrix of the tool-bar window, if any. */ |
956 | if (WINDOWP (f->tool_bar_window)) | |
957 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
5f5c8ee5 GM |
958 | |
959 | /* Clear current window matrices. */ | |
960 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
961 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); | |
962 | } | |
963 | ||
964 | ||
965 | /* Clear out all display lines of F for a coming redisplay. */ | |
966 | ||
967 | void | |
971de7fb | 968 | clear_desired_matrices (register struct frame *f) |
5f5c8ee5 GM |
969 | { |
970 | if (f->desired_matrix) | |
971 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 972 | |
5f5c8ee5 GM |
973 | if (WINDOWP (f->menu_bar_window)) |
974 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
975 | ||
9ea173e8 GM |
976 | if (WINDOWP (f->tool_bar_window)) |
977 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
5f5c8ee5 GM |
978 | |
979 | /* Do it for window matrices. */ | |
980 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
981 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
982 | } | |
983 | ||
984 | ||
985 | /* Clear matrices in window tree rooted in W. If DESIRED_P is | |
986 | non-zero clear desired matrices, otherwise clear current matrices. */ | |
987 | ||
988 | static void | |
971de7fb | 989 | clear_window_matrices (struct window *w, int desired_p) |
5f5c8ee5 GM |
990 | { |
991 | while (w) | |
992 | { | |
993 | if (!NILP (w->hchild)) | |
994 | { | |
995 | xassert (WINDOWP (w->hchild)); | |
996 | clear_window_matrices (XWINDOW (w->hchild), desired_p); | |
997 | } | |
998 | else if (!NILP (w->vchild)) | |
999 | { | |
1000 | xassert (WINDOWP (w->vchild)); | |
1001 | clear_window_matrices (XWINDOW (w->vchild), desired_p); | |
1002 | } | |
1003 | else | |
1004 | { | |
1005 | if (desired_p) | |
1006 | clear_glyph_matrix (w->desired_matrix); | |
1007 | else | |
1008 | { | |
1009 | clear_glyph_matrix (w->current_matrix); | |
1010 | w->window_end_valid = Qnil; | |
1011 | } | |
1012 | } | |
1013 | ||
1014 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
1015 | } | |
1016 | } | |
1017 | ||
1018 | ||
1019 | \f | |
1020 | /*********************************************************************** | |
1021 | Glyph Rows | |
1022 | ||
1023 | See dispextern.h for an overall explanation of glyph rows. | |
1024 | ***********************************************************************/ | |
1025 | ||
1026 | /* Clear glyph row ROW. Do it in a way that makes it robust against | |
1027 | changes in the glyph_row structure, i.e. addition or removal of | |
1028 | structure members. */ | |
1029 | ||
2cca872d KH |
1030 | static struct glyph_row null_row; |
1031 | ||
5f5c8ee5 | 1032 | void |
971de7fb | 1033 | clear_glyph_row (struct glyph_row *row) |
5f5c8ee5 GM |
1034 | { |
1035 | struct glyph *p[1 + LAST_AREA]; | |
5f5c8ee5 GM |
1036 | |
1037 | /* Save pointers. */ | |
1038 | p[LEFT_MARGIN_AREA] = row->glyphs[LEFT_MARGIN_AREA]; | |
1039 | p[TEXT_AREA] = row->glyphs[TEXT_AREA]; | |
1040 | p[RIGHT_MARGIN_AREA] = row->glyphs[RIGHT_MARGIN_AREA]; | |
1041 | p[LAST_AREA] = row->glyphs[LAST_AREA]; | |
1042 | ||
1043 | /* Clear. */ | |
1044 | *row = null_row; | |
1045 | ||
1046 | /* Restore pointers. */ | |
1047 | row->glyphs[LEFT_MARGIN_AREA] = p[LEFT_MARGIN_AREA]; | |
1048 | row->glyphs[TEXT_AREA] = p[TEXT_AREA]; | |
1049 | row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA]; | |
1050 | row->glyphs[LAST_AREA] = p[LAST_AREA]; | |
45560b1a GM |
1051 | |
1052 | #if 0 /* At some point, some bit-fields of struct glyph were not set, | |
1053 | which made glyphs unequal when compared with GLYPH_EQUAL_P. | |
1054 | Redisplay outputs such glyphs, and flickering effects were | |
1055 | the result. This also depended on the contents of memory | |
1056 | returned by xmalloc. If flickering happens again, activate | |
153a073c | 1057 | the code below. If the flickering is gone with that, chances |
45560b1a | 1058 | are that the flickering has the same reason as here. */ |
72af86bd | 1059 | memset (p[0], 0, (char *) p[LAST_AREA] - (char *) p[0]); |
45560b1a | 1060 | #endif |
5f5c8ee5 GM |
1061 | } |
1062 | ||
1063 | ||
1064 | /* Make ROW an empty, enabled row of canonical character height, | |
1065 | in window W starting at y-position Y. */ | |
1066 | ||
1067 | void | |
971de7fb | 1068 | blank_row (struct window *w, struct glyph_row *row, int y) |
5f5c8ee5 GM |
1069 | { |
1070 | int min_y, max_y; | |
177c0ea7 | 1071 | |
7df02016 KS |
1072 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
1073 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 1074 | |
5f5c8ee5 GM |
1075 | clear_glyph_row (row); |
1076 | row->y = y; | |
408f5064 | 1077 | row->ascent = row->phys_ascent = 0; |
7df02016 | 1078 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 1079 | row->visible_height = row->height; |
177c0ea7 | 1080 | |
5f5c8ee5 | 1081 | if (row->y < min_y) |
d6c747a4 GM |
1082 | row->visible_height -= min_y - row->y; |
1083 | if (row->y + row->height > max_y) | |
1084 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
1085 | |
1086 | row->enabled_p = 1; | |
1087 | } | |
1088 | ||
1089 | ||
1090 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
1091 | are the amounts by which to change positions. Note that the first | |
1092 | glyph of the text area of a row can have a buffer position even if | |
1093 | the used count of the text area is zero. Such rows display line | |
1094 | ends. */ | |
1095 | ||
1096 | void | |
971de7fb | 1097 | increment_row_positions (struct glyph_row *row, int delta, int delta_bytes) |
5f5c8ee5 GM |
1098 | { |
1099 | int area, i; | |
1100 | ||
1101 | /* Increment start and end positions. */ | |
1102 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
1103 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
1104 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
1105 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
d36fe237 EZ |
1106 | CHARPOS (row->start.pos) += delta; |
1107 | BYTEPOS (row->start.pos) += delta_bytes; | |
1108 | CHARPOS (row->end.pos) += delta; | |
1109 | BYTEPOS (row->end.pos) += delta_bytes; | |
5f5c8ee5 | 1110 | |
5cacdcfd KS |
1111 | if (!row->enabled_p) |
1112 | return; | |
1113 | ||
5f5c8ee5 GM |
1114 | /* Increment positions in glyphs. */ |
1115 | for (area = 0; area < LAST_AREA; ++area) | |
1116 | for (i = 0; i < row->used[area]; ++i) | |
1117 | if (BUFFERP (row->glyphs[area][i].object) | |
1118 | && row->glyphs[area][i].charpos > 0) | |
1119 | row->glyphs[area][i].charpos += delta; | |
1120 | ||
1121 | /* Capture the case of rows displaying a line end. */ | |
1122 | if (row->used[TEXT_AREA] == 0 | |
1123 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1124 | row->glyphs[TEXT_AREA]->charpos += delta; | |
1125 | } | |
1126 | ||
1127 | ||
9af3e742 | 1128 | #if 0 |
5f5c8ee5 GM |
1129 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
1130 | contents, i.e. glyph structure contents are exchanged between A and | |
1131 | B without changing glyph pointers in A and B. */ | |
1132 | ||
1133 | static void | |
1134 | swap_glyphs_in_rows (a, b) | |
1135 | struct glyph_row *a, *b; | |
1136 | { | |
1137 | int area; | |
1138 | ||
1139 | for (area = 0; area < LAST_AREA; ++area) | |
1140 | { | |
1141 | /* Number of glyphs to swap. */ | |
1142 | int max_used = max (a->used[area], b->used[area]); | |
1143 | ||
1144 | /* Start of glyphs in area of row A. */ | |
1145 | struct glyph *glyph_a = a->glyphs[area]; | |
1146 | ||
1147 | /* End + 1 of glyphs in area of row A. */ | |
1148 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
1149 | ||
1150 | /* Start of glyphs in area of row B. */ | |
1151 | struct glyph *glyph_b = b->glyphs[area]; | |
1152 | ||
1153 | while (glyph_a < glyph_a_end) | |
1154 | { | |
1155 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
1156 | initialization. */ | |
1157 | struct glyph temp; | |
1158 | temp = *glyph_a; | |
1159 | *glyph_a = *glyph_b; | |
1160 | *glyph_b = temp; | |
1161 | ++glyph_a; | |
1162 | ++glyph_b; | |
1163 | } | |
1164 | } | |
1165 | } | |
1166 | ||
9af3e742 | 1167 | #endif /* 0 */ |
5f5c8ee5 GM |
1168 | |
1169 | /* Exchange pointers to glyph memory between glyph rows A and B. */ | |
1170 | ||
1171 | static INLINE void | |
971de7fb | 1172 | swap_glyph_pointers (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1173 | { |
1174 | int i; | |
1175 | for (i = 0; i < LAST_AREA + 1; ++i) | |
1176 | { | |
1177 | struct glyph *temp = a->glyphs[i]; | |
1178 | a->glyphs[i] = b->glyphs[i]; | |
1179 | b->glyphs[i] = temp; | |
1180 | } | |
1181 | } | |
1182 | ||
1183 | ||
1184 | /* Copy glyph row structure FROM to glyph row structure TO, except | |
1185 | that glyph pointers in the structures are left unchanged. */ | |
1186 | ||
1187 | INLINE void | |
971de7fb | 1188 | copy_row_except_pointers (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1189 | { |
1190 | struct glyph *pointers[1 + LAST_AREA]; | |
1191 | ||
1192 | /* Save glyph pointers of TO. */ | |
72af86bd | 1193 | memcpy (pointers, to->glyphs, sizeof to->glyphs); |
5f5c8ee5 GM |
1194 | |
1195 | /* Do a structure assignment. */ | |
1196 | *to = *from; | |
1197 | ||
1198 | /* Restore original pointers of TO. */ | |
72af86bd | 1199 | memcpy (to->glyphs, pointers, sizeof to->glyphs); |
5f5c8ee5 GM |
1200 | } |
1201 | ||
1202 | ||
1203 | /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in | |
1204 | TO and FROM are left unchanged. Glyph contents are copied from the | |
1205 | glyph memory of FROM to the glyph memory of TO. Increment buffer | |
1206 | positions in row TO by DELTA/ DELTA_BYTES. */ | |
1207 | ||
1208 | void | |
971de7fb | 1209 | copy_glyph_row_contents (struct glyph_row *to, struct glyph_row *from, int delta, int delta_bytes) |
5f5c8ee5 GM |
1210 | { |
1211 | int area; | |
1212 | ||
1213 | /* This is like a structure assignment TO = FROM, except that | |
1214 | glyph pointers in the rows are left unchanged. */ | |
1215 | copy_row_except_pointers (to, from); | |
1216 | ||
1217 | /* Copy glyphs from FROM to TO. */ | |
1218 | for (area = 0; area < LAST_AREA; ++area) | |
1219 | if (from->used[area]) | |
72af86bd AS |
1220 | memcpy (to->glyphs[area], from->glyphs[area], |
1221 | from->used[area] * sizeof (struct glyph)); | |
5f5c8ee5 GM |
1222 | |
1223 | /* Increment buffer positions in TO by DELTA. */ | |
86c11ba1 | 1224 | increment_row_positions (to, delta, delta_bytes); |
5f5c8ee5 GM |
1225 | } |
1226 | ||
1227 | ||
1228 | /* Assign glyph row FROM to glyph row TO. This works like a structure | |
1229 | assignment TO = FROM, except that glyph pointers are not copied but | |
1230 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1231 | a memory leak. */ | |
1232 | ||
1233 | static INLINE void | |
971de7fb | 1234 | assign_row (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1235 | { |
1236 | swap_glyph_pointers (to, from); | |
1237 | copy_row_except_pointers (to, from); | |
1238 | } | |
1239 | ||
1240 | ||
1241 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1242 | a row in a window matrix, is a slice of the glyph memory of the | |
1243 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
1244 | is non-zero if the glyph memory of WINDOW_ROW is part of the glyph | |
1245 | memory of FRAME_ROW. */ | |
1246 | ||
2d5912c1 | 1247 | #if GLYPH_DEBUG |
9339e87f | 1248 | |
5f5c8ee5 GM |
1249 | static int |
1250 | glyph_row_slice_p (window_row, frame_row) | |
1251 | struct glyph_row *window_row, *frame_row; | |
1252 | { | |
1253 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1254 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1255 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1256 | ||
1257 | return (frame_glyph_start <= window_glyph_start | |
1258 | && window_glyph_start < frame_glyph_end); | |
1259 | } | |
1260 | ||
9339e87f | 1261 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1262 | |
9af3e742 GM |
1263 | #if 0 |
1264 | ||
5f5c8ee5 GM |
1265 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1266 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1267 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1268 | ||
1269 | static struct glyph_row * | |
1270 | find_glyph_row_slice (window_matrix, frame_matrix, row) | |
1271 | struct glyph_matrix *window_matrix, *frame_matrix; | |
1272 | int row; | |
1273 | { | |
1274 | int i; | |
1275 | ||
1276 | xassert (row >= 0 && row < frame_matrix->nrows); | |
1277 | ||
1278 | for (i = 0; i < window_matrix->nrows; ++i) | |
1279 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1280 | frame_matrix->rows + row)) | |
1281 | break; | |
1282 | ||
1283 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1284 | } | |
1285 | ||
9af3e742 | 1286 | #endif /* 0 */ |
5f5c8ee5 GM |
1287 | |
1288 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1289 | i.e. they are only marked as to be cleared by setting their | |
1290 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1291 | call to this function really clears it. */ | |
1292 | ||
1293 | void | |
971de7fb | 1294 | prepare_desired_row (struct glyph_row *row) |
5f5c8ee5 GM |
1295 | { |
1296 | if (!row->enabled_p) | |
1297 | { | |
5009f85e EZ |
1298 | unsigned rp = row->reversed_p; |
1299 | ||
5f5c8ee5 GM |
1300 | clear_glyph_row (row); |
1301 | row->enabled_p = 1; | |
5009f85e | 1302 | row->reversed_p = rp; |
5f5c8ee5 GM |
1303 | } |
1304 | } | |
1305 | ||
1306 | ||
1307 | /* Return a hash code for glyph row ROW. */ | |
1308 | ||
1309 | int | |
971de7fb | 1310 | line_hash_code (struct glyph_row *row) |
5f5c8ee5 GM |
1311 | { |
1312 | int hash = 0; | |
177c0ea7 | 1313 | |
5f5c8ee5 GM |
1314 | if (row->enabled_p) |
1315 | { | |
4cecaab8 MB |
1316 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1317 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1318 | ||
1319 | while (glyph < end) | |
1320 | { | |
1321 | int c = glyph->u.ch; | |
1322 | int face_id = glyph->face_id; | |
daf01701 | 1323 | if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
4cecaab8 MB |
1324 | c -= SPACEGLYPH; |
1325 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1326 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1327 | ++glyph; | |
1328 | } | |
5f5c8ee5 | 1329 | |
4cecaab8 MB |
1330 | if (hash == 0) |
1331 | hash = 1; | |
5f5c8ee5 GM |
1332 | } |
1333 | ||
1334 | return hash; | |
1335 | } | |
1336 | ||
1337 | ||
153a073c | 1338 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1339 | the number of characters in the line. If must_write_spaces is |
1340 | zero, leading and trailing spaces are ignored. */ | |
1341 | ||
1342 | static unsigned int | |
971de7fb | 1343 | line_draw_cost (struct glyph_matrix *matrix, int vpos) |
5f5c8ee5 GM |
1344 | { |
1345 | struct glyph_row *row = matrix->rows + vpos; | |
1346 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1347 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1348 | int len; | |
1349 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
1350 | int glyph_table_len = GLYPH_TABLE_LENGTH; | |
1351 | ||
1352 | /* Ignore trailing and leading spaces if we can. */ | |
daf01701 | 1353 | if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
5f5c8ee5 GM |
1354 | { |
1355 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1356 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1357 | --end; |
1358 | ||
177c0ea7 | 1359 | /* All blank line. */ |
5f5c8ee5 GM |
1360 | if (end == beg) |
1361 | return 0; | |
1362 | ||
1363 | /* Skip over leading spaces. */ | |
1364 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1365 | ++beg; | |
1366 | } | |
1367 | ||
1368 | /* If we don't have a glyph-table, each glyph is one character, | |
1369 | so return the number of glyphs. */ | |
1370 | if (glyph_table_base == 0) | |
1371 | len = end - beg; | |
1372 | else | |
1373 | { | |
1374 | /* Otherwise, scan the glyphs and accumulate their total length | |
1375 | in LEN. */ | |
1376 | len = 0; | |
1377 | while (beg < end) | |
1378 | { | |
3fc809e2 | 1379 | GLYPH g; |
177c0ea7 | 1380 | |
3fc809e2 KS |
1381 | SET_GLYPH_FROM_CHAR_GLYPH (g, *beg); |
1382 | ||
565b39a8 | 1383 | if (GLYPH_INVALID_P (g) |
42186983 | 1384 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) |
5f5c8ee5 GM |
1385 | len += 1; |
1386 | else | |
1387 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1388 | |
5f5c8ee5 GM |
1389 | ++beg; |
1390 | } | |
1391 | } | |
177c0ea7 | 1392 | |
5f5c8ee5 GM |
1393 | return len; |
1394 | } | |
1395 | ||
1396 | ||
1397 | /* Test two glyph rows A and B for equality. Value is non-zero if A | |
1398 | and B have equal contents. W is the window to which the glyphs | |
1399 | rows A and B belong. It is needed here to test for partial row | |
e4e0bee9 GM |
1400 | visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p |
1401 | flags of A and B, too. */ | |
5f5c8ee5 | 1402 | |
177c0ea7 | 1403 | static INLINE int |
971de7fb | 1404 | row_equal_p (struct window *w, struct glyph_row *a, struct glyph_row *b, int mouse_face_p) |
5f5c8ee5 GM |
1405 | { |
1406 | if (a == b) | |
1407 | return 1; | |
1408 | else if (a->hash != b->hash) | |
1409 | return 0; | |
1410 | else | |
1411 | { | |
1412 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1413 | int area; | |
1414 | ||
e4e0bee9 GM |
1415 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1416 | return 0; | |
1417 | ||
5f5c8ee5 GM |
1418 | /* Compare glyphs. */ |
1419 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1420 | { | |
1421 | if (a->used[area] != b->used[area]) | |
1422 | return 0; | |
177c0ea7 | 1423 | |
5f5c8ee5 GM |
1424 | a_glyph = a->glyphs[area]; |
1425 | a_end = a_glyph + a->used[area]; | |
1426 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1427 | |
5f5c8ee5 GM |
1428 | while (a_glyph < a_end |
1429 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1430 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1431 | |
5f5c8ee5 GM |
1432 | if (a_glyph != a_end) |
1433 | return 0; | |
1434 | } | |
1435 | ||
6b61353c KH |
1436 | if (a->fill_line_p != b->fill_line_p |
1437 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1438 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
1439 | || a->left_fringe_face_id != b->left_fringe_face_id | |
1440 | || a->right_fringe_bitmap != b->right_fringe_bitmap | |
1441 | || a->right_fringe_face_id != b->right_fringe_face_id | |
3d4a365f | 1442 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
6b61353c | 1443 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1444 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1445 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1446 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
918f4159 | 1447 | || a->reversed_p != b->reversed_p |
5f5c8ee5 GM |
1448 | /* Different partially visible characters on left margin. */ |
1449 | || a->x != b->x | |
1450 | /* Different height. */ | |
1451 | || a->ascent != b->ascent | |
408f5064 GM |
1452 | || a->phys_ascent != b->phys_ascent |
1453 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1454 | || a->visible_height != b->visible_height) |
1455 | return 0; | |
1456 | } | |
1457 | ||
1458 | return 1; | |
1459 | } | |
1460 | ||
1461 | ||
1462 | \f | |
1463 | /*********************************************************************** | |
1464 | Glyph Pool | |
1465 | ||
1466 | See dispextern.h for an overall explanation of glyph pools. | |
1467 | ***********************************************************************/ | |
1468 | ||
1469 | /* Allocate a glyph_pool structure. The structure returned is | |
1470 | initialized with zeros. The global variable glyph_pool_count is | |
1471 | incremented for each pool allocated. */ | |
1472 | ||
1473 | static struct glyph_pool * | |
971de7fb | 1474 | new_glyph_pool (void) |
5f5c8ee5 GM |
1475 | { |
1476 | struct glyph_pool *result; | |
1477 | ||
1478 | /* Allocate a new glyph_pool and clear it. */ | |
1479 | result = (struct glyph_pool *) xmalloc (sizeof *result); | |
72af86bd | 1480 | memset (result, 0, sizeof *result); |
177c0ea7 | 1481 | |
5f5c8ee5 GM |
1482 | /* For memory leak and double deletion checking. */ |
1483 | ++glyph_pool_count; | |
177c0ea7 | 1484 | |
5f5c8ee5 GM |
1485 | return result; |
1486 | } | |
1487 | ||
1488 | ||
1489 | /* Free a glyph_pool structure POOL. The function may be called with | |
1490 | a null POOL pointer. The global variable glyph_pool_count is | |
1491 | decremented with every pool structure freed. If this count gets | |
1492 | negative, more structures were freed than allocated, i.e. one | |
1493 | structure must have been freed more than once or a bogus pointer | |
1494 | was passed to free_glyph_pool. */ | |
1495 | ||
1496 | static void | |
971de7fb | 1497 | free_glyph_pool (struct glyph_pool *pool) |
5f5c8ee5 GM |
1498 | { |
1499 | if (pool) | |
1500 | { | |
153a073c | 1501 | /* More freed than allocated? */ |
5f5c8ee5 GM |
1502 | --glyph_pool_count; |
1503 | xassert (glyph_pool_count >= 0); | |
1504 | ||
1505 | xfree (pool->glyphs); | |
1506 | xfree (pool); | |
1507 | } | |
1508 | } | |
1509 | ||
1510 | ||
1511 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1512 | columns we need. This function never shrinks a pool. The only | |
1513 | case in which this would make sense, would be when a frame's size | |
1514 | is changed from a large value to a smaller one. But, if someone | |
1515 | does it once, we can expect that he will do it again. | |
1516 | ||
1517 | Value is non-zero if the pool changed in a way which makes | |
1518 | re-adjusting window glyph matrices necessary. */ | |
1519 | ||
1520 | static int | |
971de7fb | 1521 | realloc_glyph_pool (struct glyph_pool *pool, struct dim matrix_dim) |
5f5c8ee5 GM |
1522 | { |
1523 | int needed; | |
1524 | int changed_p; | |
1525 | ||
1526 | changed_p = (pool->glyphs == 0 | |
1527 | || matrix_dim.height != pool->nrows | |
1528 | || matrix_dim.width != pool->ncolumns); | |
1529 | ||
1530 | /* Enlarge the glyph pool. */ | |
1531 | needed = matrix_dim.width * matrix_dim.height; | |
1532 | if (needed > pool->nglyphs) | |
1533 | { | |
1534 | int size = needed * sizeof (struct glyph); | |
1535 | ||
1536 | if (pool->glyphs) | |
1537 | pool->glyphs = (struct glyph *) xrealloc (pool->glyphs, size); | |
1538 | else | |
1539 | { | |
1540 | pool->glyphs = (struct glyph *) xmalloc (size); | |
72af86bd | 1541 | memset (pool->glyphs, 0, size); |
5f5c8ee5 GM |
1542 | } |
1543 | ||
1544 | pool->nglyphs = needed; | |
1545 | } | |
1546 | ||
153a073c | 1547 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1548 | to do sanity checks, and (b) the number of columns determines |
1549 | where rows in the frame matrix start---this must be available to | |
1550 | determine pointers to rows of window sub-matrices. */ | |
1551 | pool->nrows = matrix_dim.height; | |
1552 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1553 | |
5f5c8ee5 GM |
1554 | return changed_p; |
1555 | } | |
1556 | ||
1557 | ||
1558 | \f | |
1559 | /*********************************************************************** | |
1560 | Debug Code | |
1561 | ***********************************************************************/ | |
1562 | ||
1563 | #if GLYPH_DEBUG | |
1564 | ||
a13396c9 | 1565 | |
28d440ab KL |
1566 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1567 | XXX Maybe this should be changed to flush the current terminal instead of | |
1568 | stdout. | |
1569 | */ | |
a13396c9 GM |
1570 | |
1571 | void | |
1572 | flush_stdout () | |
1573 | { | |
1574 | fflush (stdout); | |
1575 | } | |
1576 | ||
1577 | ||
5f5c8ee5 GM |
1578 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1579 | pointer has been lost, e.g. by using a structure assignment between | |
1580 | rows, at least one pointer must occur more than once in the rows of | |
1581 | MATRIX. */ | |
1582 | ||
1583 | void | |
1584 | check_matrix_pointer_lossage (matrix) | |
1585 | struct glyph_matrix *matrix; | |
1586 | { | |
1587 | int i, j; | |
177c0ea7 | 1588 | |
5f5c8ee5 GM |
1589 | for (i = 0; i < matrix->nrows; ++i) |
1590 | for (j = 0; j < matrix->nrows; ++j) | |
1591 | xassert (i == j | |
1592 | || (matrix->rows[i].glyphs[TEXT_AREA] | |
1593 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1594 | } | |
1595 | ||
1596 | ||
1597 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1598 | ||
1599 | struct glyph_row * | |
1600 | matrix_row (matrix, row) | |
1601 | struct glyph_matrix *matrix; | |
1602 | int row; | |
1603 | { | |
1604 | xassert (matrix && matrix->rows); | |
1605 | xassert (row >= 0 && row < matrix->nrows); | |
1606 | ||
1607 | /* That's really too slow for normal testing because this function | |
1608 | is called almost everywhere. Although---it's still astonishingly | |
1609 | fast, so it is valuable to have for debugging purposes. */ | |
1610 | #if 0 | |
1611 | check_matrix_pointer_lossage (matrix); | |
1612 | #endif | |
177c0ea7 | 1613 | |
5f5c8ee5 GM |
1614 | return matrix->rows + row; |
1615 | } | |
1616 | ||
1617 | ||
1618 | #if 0 /* This function makes invalid assumptions when text is | |
1619 | partially invisible. But it might come handy for debugging | |
1620 | nevertheless. */ | |
1621 | ||
1622 | /* Check invariants that must hold for an up to date current matrix of | |
1623 | window W. */ | |
1624 | ||
1625 | static void | |
1626 | check_matrix_invariants (w) | |
1627 | struct window *w; | |
1628 | { | |
1629 | struct glyph_matrix *matrix = w->current_matrix; | |
1630 | int yb = window_text_bottom_y (w); | |
1631 | struct glyph_row *row = matrix->rows; | |
1632 | struct glyph_row *last_text_row = NULL; | |
1633 | struct buffer *saved = current_buffer; | |
1634 | struct buffer *buffer = XBUFFER (w->buffer); | |
1635 | int c; | |
177c0ea7 | 1636 | |
5f5c8ee5 GM |
1637 | /* This can sometimes happen for a fresh window. */ |
1638 | if (matrix->nrows < 2) | |
1639 | return; | |
1640 | ||
1641 | set_buffer_temp (buffer); | |
1642 | ||
1643 | /* Note: last row is always reserved for the mode line. */ | |
1644 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1645 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1646 | { | |
1647 | struct glyph_row *next = row + 1; | |
1648 | ||
1649 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1650 | last_text_row = row; | |
1651 | ||
1652 | /* Check that character and byte positions are in sync. */ | |
1653 | xassert (MATRIX_ROW_START_BYTEPOS (row) | |
1654 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); | |
d36fe237 EZ |
1655 | xassert (BYTEPOS (row->start.pos) |
1656 | == CHAR_TO_BYTE (CHARPOS (row->start.pos))); | |
5f5c8ee5 GM |
1657 | |
1658 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1659 | have such a position temporarily in case of a minibuffer | |
1660 | displaying something like `[Sole completion]' at its end. */ | |
1661 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
d36fe237 EZ |
1662 | { |
1663 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1664 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); | |
1665 | xassert (BYTEPOS (row->end.pos) | |
1666 | == CHAR_TO_BYTE (CHARPOS (row->end.pos))); | |
1667 | } | |
5f5c8ee5 GM |
1668 | |
1669 | /* Check that end position of `row' is equal to start position | |
1670 | of next row. */ | |
1671 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1672 | { | |
1673 | xassert (MATRIX_ROW_END_CHARPOS (row) | |
1674 | == MATRIX_ROW_START_CHARPOS (next)); | |
1675 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1676 | == MATRIX_ROW_START_BYTEPOS (next)); | |
d36fe237 EZ |
1677 | xassert (CHARPOS (row->end.pos) == CHARPOS (next->start.pos)); |
1678 | xassert (BYTEPOS (row->end.pos) == BYTEPOS (next->start.pos)); | |
5f5c8ee5 GM |
1679 | } |
1680 | row = next; | |
1681 | } | |
1682 | ||
1683 | xassert (w->current_matrix->nrows == w->desired_matrix->nrows); | |
1684 | xassert (w->desired_matrix->rows != NULL); | |
1685 | set_buffer_temp (saved); | |
1686 | } | |
1687 | ||
1688 | #endif /* 0 */ | |
1689 | ||
1690 | #endif /* GLYPH_DEBUG != 0 */ | |
1691 | ||
1692 | ||
1693 | \f | |
1694 | /********************************************************************** | |
1695 | Allocating/ Adjusting Glyph Matrices | |
1696 | **********************************************************************/ | |
1697 | ||
1698 | /* Allocate glyph matrices over a window tree for a frame-based | |
1699 | redisplay | |
1700 | ||
1701 | X and Y are column/row within the frame glyph matrix where | |
1702 | sub-matrices for the window tree rooted at WINDOW must be | |
8ce2650d YM |
1703 | allocated. DIM_ONLY_P non-zero means that the caller of this |
1704 | function is only interested in the result matrix dimension, and | |
1705 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1706 | |
1707 | The function returns the total width/height of the sub-matrices of | |
1708 | the window tree. If called on a frame root window, the computation | |
1709 | will take the mini-buffer window into account. | |
1710 | ||
1711 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1712 | ||
1713 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1714 | glyph matrices yet, and | |
1715 | ||
1716 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1717 | any window in the tree will be changed or have been changed (see | |
153a073c | 1718 | DIM_ONLY_P) |
5f5c8ee5 GM |
1719 | |
1720 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1721 | function. | |
1722 | ||
1723 | Windows are arranged into chains of windows on the same level | |
1724 | through the next fields of window structures. Such a level can be | |
1725 | either a sequence of horizontally adjacent windows from left to | |
1726 | right, or a sequence of vertically adjacent windows from top to | |
1727 | bottom. Each window in a horizontal sequence can be either a leaf | |
1728 | window or a vertical sequence; a window in a vertical sequence can | |
1729 | be either a leaf or a horizontal sequence. All windows in a | |
1730 | horizontal sequence have the same height, and all windows in a | |
1731 | vertical sequence have the same width. | |
1732 | ||
1733 | This function uses, for historical reasons, a more general | |
1734 | algorithm to determine glyph matrix dimensions that would be | |
1735 | necessary. | |
1736 | ||
1737 | The matrix height of a horizontal sequence is determined by the | |
1738 | maximum height of any matrix in the sequence. The matrix width of | |
1739 | a horizontal sequence is computed by adding up matrix widths of | |
1740 | windows in the sequence. | |
1741 | ||
1742 | |<------- result width ------->| | |
1743 | +---------+----------+---------+ --- | |
1744 | | | | | | | |
1745 | | | | | | |
1746 | +---------+ | | result height | |
1747 | | +---------+ | |
1748 | | | | | |
1749 | +----------+ --- | |
1750 | ||
1751 | The matrix width of a vertical sequence is the maximum matrix width | |
1752 | of any window in the sequence. Its height is computed by adding up | |
1753 | matrix heights of windows in the sequence. | |
1754 | ||
1755 | |<---- result width -->| | |
1756 | +---------+ --- | |
1757 | | | | | |
1758 | | | | | |
1759 | +---------+--+ | | |
1760 | | | | | |
1761 | | | result height | |
1762 | | | | |
1763 | +------------+---------+ | | |
1764 | | | | | |
1765 | | | | | |
1766 | +------------+---------+ --- */ | |
1767 | ||
1768 | /* Bit indicating that a new matrix will be allocated or has been | |
1769 | allocated. */ | |
1770 | ||
1771 | #define NEW_LEAF_MATRIX (1 << 0) | |
1772 | ||
1773 | /* Bit indicating that a matrix will or has changed its location or | |
1774 | size. */ | |
1775 | ||
1776 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1777 | ||
1778 | static struct dim | |
5d3cc43c GM |
1779 | allocate_matrices_for_frame_redisplay (window, x, y, dim_only_p, |
1780 | window_change_flags) | |
5f5c8ee5 GM |
1781 | Lisp_Object window; |
1782 | int x, y; | |
5f5c8ee5 GM |
1783 | int dim_only_p; |
1784 | int *window_change_flags; | |
1785 | { | |
1786 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1787 | int x0 = x, y0 = y; | |
1788 | int wmax = 0, hmax = 0; | |
1789 | struct dim total; | |
1790 | struct dim dim; | |
1791 | struct window *w; | |
1792 | int in_horz_combination_p; | |
1793 | ||
1794 | /* What combination is WINDOW part of? Compute this once since the | |
1795 | result is the same for all windows in the `next' chain. The | |
1796 | special case of a root window (parent equal to nil) is treated | |
1797 | like a vertical combination because a root window's `next' | |
1798 | points to the mini-buffer window, if any, which is arranged | |
1799 | vertically below other windows. */ | |
1800 | in_horz_combination_p | |
1801 | = (!NILP (XWINDOW (window)->parent) | |
1802 | && !NILP (XWINDOW (XWINDOW (window)->parent)->hchild)); | |
1803 | ||
1804 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1805 | do |
5f5c8ee5 GM |
1806 | { |
1807 | w = XWINDOW (window); | |
1808 | ||
1809 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1810 | on whether this is a combination or a leaf window. */ |
5f5c8ee5 | 1811 | if (!NILP (w->hchild)) |
177c0ea7 | 1812 | dim = allocate_matrices_for_frame_redisplay (w->hchild, x, y, |
5f5c8ee5 GM |
1813 | dim_only_p, |
1814 | window_change_flags); | |
1815 | else if (!NILP (w->vchild)) | |
177c0ea7 | 1816 | dim = allocate_matrices_for_frame_redisplay (w->vchild, x, y, |
5f5c8ee5 GM |
1817 | dim_only_p, |
1818 | window_change_flags); | |
1819 | else | |
1820 | { | |
1821 | /* If not already done, allocate sub-matrix structures. */ | |
1822 | if (w->desired_matrix == NULL) | |
1823 | { | |
1824 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1825 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1826 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1827 | } | |
177c0ea7 | 1828 | |
5f5c8ee5 GM |
1829 | /* Width and height MUST be chosen so that there are no |
1830 | holes in the frame matrix. */ | |
5d3cc43c GM |
1831 | dim.width = required_matrix_width (w); |
1832 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1833 | |
1834 | /* Will matrix be re-allocated? */ | |
1835 | if (x != w->desired_matrix->matrix_x | |
1836 | || y != w->desired_matrix->matrix_y | |
1837 | || dim.width != w->desired_matrix->matrix_w | |
1838 | || dim.height != w->desired_matrix->matrix_h | |
1839 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1840 | w->left_margin_cols) |
5f5c8ee5 GM |
1841 | != w->desired_matrix->left_margin_glyphs) |
1842 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1843 | w->right_margin_cols) |
5f5c8ee5 GM |
1844 | != w->desired_matrix->right_margin_glyphs)) |
1845 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1846 | ||
1847 | /* Actually change matrices, if allowed. Do not consider | |
1848 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1849 | may have been changed which we don't now here. We trust | |
1850 | that we only will be called with DIM_ONLY_P != 0 when | |
1851 | necessary. */ | |
1852 | if (!dim_only_p) | |
1853 | { | |
1854 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1855 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1856 | } | |
1857 | } | |
1858 | ||
1859 | /* If we are part of a horizontal combination, advance x for | |
1860 | windows to the right of W; otherwise advance y for windows | |
1861 | below W. */ | |
1862 | if (in_horz_combination_p) | |
1863 | x += dim.width; | |
177c0ea7 | 1864 | else |
5f5c8ee5 GM |
1865 | y += dim.height; |
1866 | ||
1867 | /* Remember maximum glyph matrix dimensions. */ | |
1868 | wmax = max (wmax, dim.width); | |
1869 | hmax = max (hmax, dim.height); | |
1870 | ||
1871 | /* Next window on same level. */ | |
1872 | window = w->next; | |
1873 | } | |
1874 | while (!NILP (window)); | |
1875 | ||
1876 | /* Set `total' to the total glyph matrix dimension of this window | |
1877 | level. In a vertical combination, the width is the width of the | |
1878 | widest window; the height is the y we finally reached, corrected | |
1879 | by the y we started with. In a horizontal combination, the total | |
1880 | height is the height of the tallest window, and the width is the | |
1881 | x we finally reached, corrected by the x we started with. */ | |
1882 | if (in_horz_combination_p) | |
1883 | { | |
1884 | total.width = x - x0; | |
1885 | total.height = hmax; | |
1886 | } | |
177c0ea7 | 1887 | else |
5f5c8ee5 GM |
1888 | { |
1889 | total.width = wmax; | |
1890 | total.height = y - y0; | |
1891 | } | |
1892 | ||
1893 | return total; | |
1894 | } | |
1895 | ||
1896 | ||
5d3cc43c GM |
1897 | /* Return the required height of glyph matrices for window W. */ |
1898 | ||
1899 | int | |
971de7fb | 1900 | required_matrix_height (struct window *w) |
5d3cc43c GM |
1901 | { |
1902 | #ifdef HAVE_WINDOW_SYSTEM | |
1903 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 1904 | |
5d3cc43c GM |
1905 | if (FRAME_WINDOW_P (f)) |
1906 | { | |
1907 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1ea40aa2 | 1908 | int window_pixel_height = window_box_height (w) + eabs (w->vscroll); |
5d3cc43c | 1909 | return (((window_pixel_height + ch_height - 1) |
cc834cf9 | 1910 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
1911 | /* One partially visible line at the top and |
1912 | bottom of the window. */ | |
1913 | + 2 | |
153a073c | 1914 | /* 2 for header and mode line. */ |
5d3cc43c GM |
1915 | + 2); |
1916 | } | |
1917 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 1918 | |
7df02016 | 1919 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
1920 | } |
1921 | ||
1922 | ||
1923 | /* Return the required width of glyph matrices for window W. */ | |
1924 | ||
1925 | int | |
971de7fb | 1926 | required_matrix_width (struct window *w) |
5d3cc43c GM |
1927 | { |
1928 | #ifdef HAVE_WINDOW_SYSTEM | |
1929 | struct frame *f = XFRAME (w->frame); | |
1930 | if (FRAME_WINDOW_P (f)) | |
1931 | { | |
1932 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 1933 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 1934 | |
5d3cc43c GM |
1935 | /* Compute number of glyphs needed in a glyph row. */ |
1936 | return (((window_pixel_width + ch_width - 1) | |
cc834cf9 | 1937 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
1938 | /* 2 partially visible columns in the text area. */ |
1939 | + 2 | |
1940 | /* One partially visible column at the right | |
1941 | edge of each marginal area. */ | |
1942 | + 1 + 1); | |
1943 | } | |
1944 | #endif /* HAVE_WINDOW_SYSTEM */ | |
1945 | ||
7df02016 | 1946 | return XINT (w->total_cols); |
5d3cc43c GM |
1947 | } |
1948 | ||
1949 | ||
5f5c8ee5 | 1950 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 1951 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 1952 | |
5f5c8ee5 | 1953 | static void |
971de7fb | 1954 | allocate_matrices_for_window_redisplay (struct window *w) |
5f5c8ee5 | 1955 | { |
5f5c8ee5 GM |
1956 | while (w) |
1957 | { | |
1958 | if (!NILP (w->vchild)) | |
5d3cc43c | 1959 | allocate_matrices_for_window_redisplay (XWINDOW (w->vchild)); |
5f5c8ee5 | 1960 | else if (!NILP (w->hchild)) |
5d3cc43c | 1961 | allocate_matrices_for_window_redisplay (XWINDOW (w->hchild)); |
5f5c8ee5 GM |
1962 | else |
1963 | { | |
1964 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
1965 | struct dim dim; |
1966 | ||
1967 | /* If matrices are not yet allocated, allocate them now. */ | |
1968 | if (w->desired_matrix == NULL) | |
1969 | { | |
1970 | w->desired_matrix = new_glyph_matrix (NULL); | |
1971 | w->current_matrix = new_glyph_matrix (NULL); | |
1972 | } | |
1973 | ||
5d3cc43c GM |
1974 | dim.width = required_matrix_width (w); |
1975 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1976 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
1977 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
1978 | } | |
177c0ea7 | 1979 | |
5f5c8ee5 GM |
1980 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
1981 | } | |
1982 | } | |
1983 | ||
1984 | ||
1985 | /* Re-allocate/ re-compute glyph matrices on frame F. If F is null, | |
1986 | do it for all frames; otherwise do it just for the given frame. | |
1987 | This function must be called when a new frame is created, its size | |
1988 | changes, or its window configuration changes. */ | |
1989 | ||
1990 | void | |
971de7fb | 1991 | adjust_glyphs (struct frame *f) |
5f5c8ee5 | 1992 | { |
408f5064 GM |
1993 | /* Block input so that expose events and other events that access |
1994 | glyph matrices are not processed while we are changing them. */ | |
1995 | BLOCK_INPUT; | |
1996 | ||
5f5c8ee5 GM |
1997 | if (f) |
1998 | adjust_frame_glyphs (f); | |
1999 | else | |
2000 | { | |
2001 | Lisp_Object tail, lisp_frame; | |
177c0ea7 | 2002 | |
5f5c8ee5 GM |
2003 | FOR_EACH_FRAME (tail, lisp_frame) |
2004 | adjust_frame_glyphs (XFRAME (lisp_frame)); | |
2005 | } | |
408f5064 GM |
2006 | |
2007 | UNBLOCK_INPUT; | |
5f5c8ee5 GM |
2008 | } |
2009 | ||
2010 | ||
2011 | /* Adjust frame glyphs when Emacs is initialized. | |
177c0ea7 JB |
2012 | |
2013 | To be called from init_display. | |
2014 | ||
5f5c8ee5 GM |
2015 | We need a glyph matrix because redraw will happen soon. |
2016 | Unfortunately, window sizes on selected_frame are not yet set to | |
2017 | meaningful values. I believe we can assume that there are only two | |
2018 | windows on the frame---the mini-buffer and the root window. Frame | |
2019 | height and width seem to be correct so far. So, set the sizes of | |
2020 | windows to estimated values. */ | |
2021 | ||
2022 | static void | |
971de7fb | 2023 | adjust_frame_glyphs_initially (void) |
5f5c8ee5 | 2024 | { |
91fb7e1b GM |
2025 | struct frame *sf = SELECTED_FRAME (); |
2026 | struct window *root = XWINDOW (sf->root_window); | |
5f5c8ee5 | 2027 | struct window *mini = XWINDOW (root->next); |
7df02016 KS |
2028 | int frame_lines = FRAME_LINES (sf); |
2029 | int frame_cols = FRAME_COLS (sf); | |
91fb7e1b | 2030 | int top_margin = FRAME_TOP_MARGIN (sf); |
5f5c8ee5 GM |
2031 | |
2032 | /* Do it for the root window. */ | |
7df02016 KS |
2033 | XSETFASTINT (root->top_line, top_margin); |
2034 | XSETFASTINT (root->total_cols, frame_cols); | |
2035 | set_window_height (sf->root_window, frame_lines - 1 - top_margin, 0); | |
5f5c8ee5 GM |
2036 | |
2037 | /* Do it for the mini-buffer window. */ | |
7df02016 KS |
2038 | XSETFASTINT (mini->top_line, frame_lines - 1); |
2039 | XSETFASTINT (mini->total_cols, frame_cols); | |
5f5c8ee5 GM |
2040 | set_window_height (root->next, 1, 0); |
2041 | ||
91fb7e1b | 2042 | adjust_frame_glyphs (sf); |
5f5c8ee5 GM |
2043 | glyphs_initialized_initially_p = 1; |
2044 | } | |
177c0ea7 | 2045 | |
5f5c8ee5 GM |
2046 | |
2047 | /* Allocate/reallocate glyph matrices of a single frame F. */ | |
2048 | ||
2049 | static void | |
971de7fb | 2050 | adjust_frame_glyphs (struct frame *f) |
5f5c8ee5 GM |
2051 | { |
2052 | if (FRAME_WINDOW_P (f)) | |
2053 | adjust_frame_glyphs_for_window_redisplay (f); | |
2054 | else | |
2055 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 2056 | |
5f5c8ee5 GM |
2057 | /* Don't forget the message buffer and the buffer for |
2058 | decode_mode_spec. */ | |
2059 | adjust_frame_message_buffer (f); | |
2060 | adjust_decode_mode_spec_buffer (f); | |
2061 | ||
2062 | f->glyphs_initialized_p = 1; | |
2063 | } | |
2064 | ||
075757cc CY |
2065 | /* Return 1 if any window in the tree has nonzero window margins. See |
2066 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ | |
2067 | static int | |
971de7fb | 2068 | showing_window_margins_p (struct window *w) |
075757cc CY |
2069 | { |
2070 | while (w) | |
2071 | { | |
2072 | if (!NILP (w->hchild)) | |
2073 | { | |
2074 | if (showing_window_margins_p (XWINDOW (w->hchild))) | |
2075 | return 1; | |
2076 | } | |
2077 | else if (!NILP (w->vchild)) | |
2078 | { | |
2079 | if (showing_window_margins_p (XWINDOW (w->vchild))) | |
2080 | return 1; | |
2081 | } | |
2082 | else if (!NILP (w->left_margin_cols) | |
2083 | || !NILP (w->right_margin_cols)) | |
2084 | return 1; | |
3fc809e2 | 2085 | |
075757cc CY |
2086 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2087 | } | |
2088 | return 0; | |
2089 | } | |
2090 | ||
5f5c8ee5 | 2091 | |
c9f00270 GM |
2092 | /* In the window tree with root W, build current matrices of leaf |
2093 | windows from the frame's current matrix. */ | |
2094 | ||
2095 | static void | |
971de7fb | 2096 | fake_current_matrices (Lisp_Object window) |
c9f00270 GM |
2097 | { |
2098 | struct window *w; | |
177c0ea7 | 2099 | |
c9f00270 GM |
2100 | for (; !NILP (window); window = w->next) |
2101 | { | |
2102 | w = XWINDOW (window); | |
177c0ea7 | 2103 | |
c9f00270 GM |
2104 | if (!NILP (w->hchild)) |
2105 | fake_current_matrices (w->hchild); | |
2106 | else if (!NILP (w->vchild)) | |
2107 | fake_current_matrices (w->vchild); | |
2108 | else | |
2109 | { | |
2110 | int i; | |
2111 | struct frame *f = XFRAME (w->frame); | |
2112 | struct glyph_matrix *m = w->current_matrix; | |
2113 | struct glyph_matrix *fm = f->current_matrix; | |
2114 | ||
7df02016 KS |
2115 | xassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
2116 | xassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 2117 | |
c9f00270 GM |
2118 | for (i = 0; i < m->matrix_h; ++i) |
2119 | { | |
2120 | struct glyph_row *r = m->rows + i; | |
7df02016 | 2121 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 GM |
2122 | |
2123 | xassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] | |
2124 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); | |
2125 | ||
2126 | r->enabled_p = fr->enabled_p; | |
2127 | if (r->enabled_p) | |
2128 | { | |
2129 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
2130 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
2131 | r->used[TEXT_AREA] = (m->matrix_w | |
2132 | - r->used[LEFT_MARGIN_AREA] | |
2133 | - r->used[RIGHT_MARGIN_AREA]); | |
2134 | r->mode_line_p = 0; | |
c9f00270 GM |
2135 | } |
2136 | } | |
2137 | } | |
2138 | } | |
2139 | } | |
2140 | ||
2141 | ||
bccee4f2 | 2142 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 2143 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 2144 | |
bccee4f2 | 2145 | static struct glyph_matrix * |
971de7fb | 2146 | save_current_matrix (struct frame *f) |
c9f00270 | 2147 | { |
bccee4f2 GM |
2148 | int i; |
2149 | struct glyph_matrix *saved; | |
e797dea6 | 2150 | |
bccee4f2 | 2151 | saved = (struct glyph_matrix *) xmalloc (sizeof *saved); |
72af86bd | 2152 | memset (saved, 0, sizeof *saved); |
bccee4f2 GM |
2153 | saved->nrows = f->current_matrix->nrows; |
2154 | saved->rows = (struct glyph_row *) xmalloc (saved->nrows | |
2155 | * sizeof *saved->rows); | |
72af86bd | 2156 | memset (saved->rows, 0, saved->nrows * sizeof *saved->rows); |
bccee4f2 GM |
2157 | |
2158 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 2159 | { |
bccee4f2 GM |
2160 | struct glyph_row *from = f->current_matrix->rows + i; |
2161 | struct glyph_row *to = saved->rows + i; | |
2162 | size_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); | |
2163 | to->glyphs[TEXT_AREA] = (struct glyph *) xmalloc (nbytes); | |
72af86bd | 2164 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
bccee4f2 | 2165 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
e797dea6 | 2166 | } |
bccee4f2 GM |
2167 | |
2168 | return saved; | |
2169 | } | |
2170 | ||
2171 | ||
2172 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
2173 | and free memory associated with SAVED. */ | |
2174 | ||
2175 | static void | |
971de7fb | 2176 | restore_current_matrix (struct frame *f, struct glyph_matrix *saved) |
bccee4f2 GM |
2177 | { |
2178 | int i; | |
2179 | ||
2180 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 2181 | { |
bccee4f2 GM |
2182 | struct glyph_row *from = saved->rows + i; |
2183 | struct glyph_row *to = f->current_matrix->rows + i; | |
e797dea6 | 2184 | size_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
72af86bd | 2185 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
e797dea6 | 2186 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
bccee4f2 | 2187 | xfree (from->glyphs[TEXT_AREA]); |
e797dea6 | 2188 | } |
177c0ea7 | 2189 | |
bccee4f2 GM |
2190 | xfree (saved->rows); |
2191 | xfree (saved); | |
c9f00270 GM |
2192 | } |
2193 | ||
2194 | ||
bccee4f2 | 2195 | |
5f5c8ee5 GM |
2196 | /* Allocate/reallocate glyph matrices of a single frame F for |
2197 | frame-based redisplay. */ | |
2198 | ||
2199 | static void | |
971de7fb | 2200 | adjust_frame_glyphs_for_frame_redisplay (struct frame *f) |
5f5c8ee5 | 2201 | { |
5f5c8ee5 GM |
2202 | struct dim matrix_dim; |
2203 | int pool_changed_p; | |
2204 | int window_change_flags; | |
2205 | int top_window_y; | |
2206 | ||
2207 | if (!FRAME_LIVE_P (f)) | |
2208 | return; | |
2209 | ||
5f5c8ee5 GM |
2210 | top_window_y = FRAME_TOP_MARGIN (f); |
2211 | ||
2212 | /* Allocate glyph pool structures if not already done. */ | |
2213 | if (f->desired_pool == NULL) | |
2214 | { | |
2215 | f->desired_pool = new_glyph_pool (); | |
2216 | f->current_pool = new_glyph_pool (); | |
2217 | } | |
2218 | ||
2219 | /* Allocate frames matrix structures if needed. */ | |
2220 | if (f->desired_matrix == NULL) | |
2221 | { | |
2222 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
2223 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
2224 | } | |
177c0ea7 | 2225 | |
5f5c8ee5 GM |
2226 | /* Compute window glyph matrices. (This takes the mini-buffer |
2227 | window into account). The result is the size of the frame glyph | |
2228 | matrix needed. The variable window_change_flags is set to a bit | |
2229 | mask indicating whether new matrices will be allocated or | |
2230 | existing matrices change their size or location within the frame | |
2231 | matrix. */ | |
2232 | window_change_flags = 0; | |
2233 | matrix_dim | |
2234 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
2235 | 0, top_window_y, | |
5d3cc43c | 2236 | 1, |
5f5c8ee5 GM |
2237 | &window_change_flags); |
2238 | ||
2239 | /* Add in menu bar lines, if any. */ | |
2240 | matrix_dim.height += top_window_y; | |
2241 | ||
2242 | /* Enlarge pools as necessary. */ | |
2243 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
2244 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
2245 | ||
177c0ea7 | 2246 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
2247 | absolutely necessary since it requires a frame redraw. */ |
2248 | if (pool_changed_p || window_change_flags) | |
2249 | { | |
2250 | /* Do it for window matrices. */ | |
2251 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 2252 | 0, top_window_y, 0, |
5f5c8ee5 GM |
2253 | &window_change_flags); |
2254 | ||
2255 | /* Size of frame matrices must equal size of frame. Note | |
2256 | that we are called for X frames with window widths NOT equal | |
2257 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
7df02016 KS |
2258 | xassert (matrix_dim.width == FRAME_COLS (f) |
2259 | && matrix_dim.height == FRAME_LINES (f)); | |
177c0ea7 | 2260 | |
e797dea6 GM |
2261 | /* Pointers to glyph memory in glyph rows are exchanged during |
2262 | the update phase of redisplay, which means in general that a | |
2263 | frame's current matrix consists of pointers into both the | |
2264 | desired and current glyph pool of the frame. Adjusting a | |
2265 | matrix sets the frame matrix up so that pointers are all into | |
2266 | the same pool. If we want to preserve glyph contents of the | |
2267 | current matrix over a call to adjust_glyph_matrix, we must | |
2268 | make a copy of the current glyphs, and restore the current | |
2269 | matrix' contents from that copy. */ | |
2270 | if (display_completed | |
2271 | && !FRAME_GARBAGED_P (f) | |
2272 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
2273 | && matrix_dim.height == f->current_matrix->matrix_h |
2274 | /* For some reason, the frame glyph matrix gets corrupted if | |
2275 | any of the windows contain margins. I haven't been able | |
2276 | to hunt down the reason, but for the moment this prevents | |
2277 | the problem from manifesting. -- cyd */ | |
2278 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) | |
e797dea6 | 2279 | { |
bccee4f2 GM |
2280 | struct glyph_matrix *copy = save_current_matrix (f); |
2281 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2282 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2283 | restore_current_matrix (f, copy); |
e797dea6 GM |
2284 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2285 | } | |
c9f00270 | 2286 | else |
e797dea6 | 2287 | { |
bccee4f2 | 2288 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2289 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2290 | SET_FRAME_GARBAGED (f); | |
2291 | } | |
5f5c8ee5 GM |
2292 | } |
2293 | } | |
2294 | ||
2295 | ||
2296 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2297 | window-based redisplay. */ | |
2298 | ||
2299 | static void | |
971de7fb | 2300 | adjust_frame_glyphs_for_window_redisplay (struct frame *f) |
5f5c8ee5 | 2301 | { |
5f5c8ee5 GM |
2302 | struct window *w; |
2303 | ||
2304 | xassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); | |
177c0ea7 | 2305 | |
5f5c8ee5 | 2306 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2307 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2308 | |
8ce2650d | 2309 | #ifdef HAVE_X_WINDOWS |
5f5c8ee5 GM |
2310 | /* Allocate/ reallocate matrices of the dummy window used to display |
2311 | the menu bar under X when no X toolkit support is available. */ | |
488dd4c4 | 2312 | #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2313 | { |
2314 | /* Allocate a dummy window if not already done. */ | |
2315 | if (NILP (f->menu_bar_window)) | |
2316 | { | |
2317 | f->menu_bar_window = make_window (); | |
2318 | w = XWINDOW (f->menu_bar_window); | |
2319 | XSETFRAME (w->frame, f); | |
2320 | w->pseudo_window_p = 1; | |
2321 | } | |
2322 | else | |
2323 | w = XWINDOW (f->menu_bar_window); | |
2324 | ||
2325 | /* Set window dimensions to frame dimensions and allocate or | |
2326 | adjust glyph matrices of W. */ | |
7df02016 KS |
2327 | XSETFASTINT (w->top_line, 0); |
2328 | XSETFASTINT (w->left_col, 0); | |
2329 | XSETFASTINT (w->total_lines, FRAME_MENU_BAR_LINES (f)); | |
2330 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
5d3cc43c | 2331 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2332 | } |
57714a86 YM |
2333 | #endif /* not USE_X_TOOLKIT && not USE_GTK */ |
2334 | #endif /* HAVE_X_WINDOWS */ | |
5f5c8ee5 | 2335 | |
488dd4c4 | 2336 | #ifndef USE_GTK |
9ea173e8 GM |
2337 | /* Allocate/ reallocate matrices of the tool bar window. If we |
2338 | don't have a tool bar window yet, make one. */ | |
2339 | if (NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2340 | { |
9ea173e8 GM |
2341 | f->tool_bar_window = make_window (); |
2342 | w = XWINDOW (f->tool_bar_window); | |
5f5c8ee5 GM |
2343 | XSETFRAME (w->frame, f); |
2344 | w->pseudo_window_p = 1; | |
2345 | } | |
2346 | else | |
9ea173e8 | 2347 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2348 | |
7df02016 KS |
2349 | XSETFASTINT (w->top_line, FRAME_MENU_BAR_LINES (f)); |
2350 | XSETFASTINT (w->left_col, 0); | |
2351 | XSETFASTINT (w->total_lines, FRAME_TOOL_BAR_LINES (f)); | |
2352 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
5d3cc43c | 2353 | allocate_matrices_for_window_redisplay (w); |
488dd4c4 | 2354 | #endif |
5f5c8ee5 GM |
2355 | } |
2356 | ||
2357 | ||
177c0ea7 | 2358 | /* Adjust/ allocate message buffer of frame F. |
5f5c8ee5 | 2359 | |
5f5c8ee5 GM |
2360 | Note that the message buffer is never freed. Since I could not |
2361 | find a free in 19.34, I assume that freeing it would be | |
2362 | problematic in some way and don't do it either. | |
2363 | ||
2364 | (Implementation note: It should be checked if we can free it | |
2365 | eventually without causing trouble). */ | |
2366 | ||
2367 | static void | |
971de7fb | 2368 | adjust_frame_message_buffer (struct frame *f) |
5f5c8ee5 GM |
2369 | { |
2370 | int size = FRAME_MESSAGE_BUF_SIZE (f) + 1; | |
2371 | ||
2372 | if (FRAME_MESSAGE_BUF (f)) | |
2373 | { | |
2374 | char *buffer = FRAME_MESSAGE_BUF (f); | |
2375 | char *new_buffer = (char *) xrealloc (buffer, size); | |
5f5c8ee5 GM |
2376 | FRAME_MESSAGE_BUF (f) = new_buffer; |
2377 | } | |
2378 | else | |
2379 | FRAME_MESSAGE_BUF (f) = (char *) xmalloc (size); | |
2380 | } | |
2381 | ||
2382 | ||
2383 | /* Re-allocate buffer for decode_mode_spec on frame F. */ | |
2384 | ||
2385 | static void | |
971de7fb | 2386 | adjust_decode_mode_spec_buffer (struct frame *f) |
5f5c8ee5 GM |
2387 | { |
2388 | f->decode_mode_spec_buffer | |
2389 | = (char *) xrealloc (f->decode_mode_spec_buffer, | |
2390 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
2391 | } | |
2392 | ||
2393 | ||
2394 | \f | |
2395 | /********************************************************************** | |
2396 | Freeing Glyph Matrices | |
2397 | **********************************************************************/ | |
2398 | ||
2399 | /* Free glyph memory for a frame F. F may be null. This function can | |
2400 | be called for the same frame more than once. The root window of | |
2401 | F may be nil when this function is called. This is the case when | |
2402 | the function is called when F is destroyed. */ | |
2403 | ||
2404 | void | |
971de7fb | 2405 | free_glyphs (struct frame *f) |
5f5c8ee5 GM |
2406 | { |
2407 | if (f && f->glyphs_initialized_p) | |
2408 | { | |
42f55fe0 GM |
2409 | /* Block interrupt input so that we don't get surprised by an X |
2410 | event while we're in an inconsistent state. */ | |
2411 | BLOCK_INPUT; | |
5f5c8ee5 | 2412 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2413 | |
5f5c8ee5 GM |
2414 | /* Release window sub-matrices. */ |
2415 | if (!NILP (f->root_window)) | |
2416 | free_window_matrices (XWINDOW (f->root_window)); | |
2417 | ||
2418 | /* Free the dummy window for menu bars without X toolkit and its | |
2419 | glyph matrices. */ | |
2420 | if (!NILP (f->menu_bar_window)) | |
2421 | { | |
2422 | struct window *w = XWINDOW (f->menu_bar_window); | |
2423 | free_glyph_matrix (w->desired_matrix); | |
2424 | free_glyph_matrix (w->current_matrix); | |
2425 | w->desired_matrix = w->current_matrix = NULL; | |
2426 | f->menu_bar_window = Qnil; | |
2427 | } | |
2428 | ||
9ea173e8 GM |
2429 | /* Free the tool bar window and its glyph matrices. */ |
2430 | if (!NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2431 | { |
9ea173e8 | 2432 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2433 | free_glyph_matrix (w->desired_matrix); |
2434 | free_glyph_matrix (w->current_matrix); | |
2435 | w->desired_matrix = w->current_matrix = NULL; | |
9ea173e8 | 2436 | f->tool_bar_window = Qnil; |
5f5c8ee5 GM |
2437 | } |
2438 | ||
2439 | /* Release frame glyph matrices. Reset fields to zero in | |
2440 | case we are called a second time. */ | |
2441 | if (f->desired_matrix) | |
2442 | { | |
2443 | free_glyph_matrix (f->desired_matrix); | |
2444 | free_glyph_matrix (f->current_matrix); | |
2445 | f->desired_matrix = f->current_matrix = NULL; | |
2446 | } | |
2447 | ||
2448 | /* Release glyph pools. */ | |
2449 | if (f->desired_pool) | |
2450 | { | |
2451 | free_glyph_pool (f->desired_pool); | |
2452 | free_glyph_pool (f->current_pool); | |
2453 | f->desired_pool = f->current_pool = NULL; | |
2454 | } | |
177c0ea7 | 2455 | |
42f55fe0 | 2456 | UNBLOCK_INPUT; |
5f5c8ee5 GM |
2457 | } |
2458 | } | |
2459 | ||
2460 | ||
2461 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2462 | function may be called with a null pointer, and it may be called on | |
2463 | the same tree more than once. */ | |
2464 | ||
2465 | void | |
971de7fb | 2466 | free_window_matrices (struct window *w) |
5f5c8ee5 GM |
2467 | { |
2468 | while (w) | |
2469 | { | |
2470 | if (!NILP (w->hchild)) | |
2471 | free_window_matrices (XWINDOW (w->hchild)); | |
2472 | else if (!NILP (w->vchild)) | |
2473 | free_window_matrices (XWINDOW (w->vchild)); | |
177c0ea7 | 2474 | else |
5f5c8ee5 GM |
2475 | { |
2476 | /* This is a leaf window. Free its memory and reset fields | |
2477 | to zero in case this function is called a second time for | |
2478 | W. */ | |
2479 | free_glyph_matrix (w->current_matrix); | |
2480 | free_glyph_matrix (w->desired_matrix); | |
2481 | w->current_matrix = w->desired_matrix = NULL; | |
2482 | } | |
2483 | ||
2484 | /* Next window on same level. */ | |
2485 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2486 | } | |
2487 | } | |
2488 | ||
2489 | ||
2490 | /* Check glyph memory leaks. This function is called from | |
2491 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2492 | exits. We therefore free all glyph memory for all active frames | |
2493 | explicitly and check that nothing is left allocated. */ | |
2494 | ||
2495 | void | |
971de7fb | 2496 | check_glyph_memory (void) |
5f5c8ee5 GM |
2497 | { |
2498 | Lisp_Object tail, frame; | |
2499 | ||
2500 | /* Free glyph memory for all frames. */ | |
2501 | FOR_EACH_FRAME (tail, frame) | |
2502 | free_glyphs (XFRAME (frame)); | |
2503 | ||
2504 | /* Check that nothing is left allocated. */ | |
2505 | if (glyph_matrix_count) | |
2506 | abort (); | |
2507 | if (glyph_pool_count) | |
2508 | abort (); | |
2509 | } | |
2510 | ||
2511 | ||
2512 | \f | |
2513 | /********************************************************************** | |
2514 | Building a Frame Matrix | |
2515 | **********************************************************************/ | |
2516 | ||
2517 | /* Most of the redisplay code works on glyph matrices attached to | |
2518 | windows. This is a good solution most of the time, but it is not | |
2519 | suitable for terminal code. Terminal output functions cannot rely | |
2520 | on being able to set an arbitrary terminal window. Instead they | |
2521 | must be provided with a view of the whole frame, i.e. the whole | |
2522 | screen. We build such a view by constructing a frame matrix from | |
2523 | window matrices in this section. | |
2524 | ||
2525 | Windows that must be updated have their must_be_update_p flag set. | |
2526 | For all such windows, their desired matrix is made part of the | |
2527 | desired frame matrix. For other windows, their current matrix is | |
2528 | made part of the desired frame matrix. | |
2529 | ||
2530 | +-----------------+----------------+ | |
2531 | | desired | desired | | |
2532 | | | | | |
2533 | +-----------------+----------------+ | |
2534 | | current | | |
2535 | | | | |
2536 | +----------------------------------+ | |
2537 | ||
2538 | Desired window matrices can be made part of the frame matrix in a | |
2539 | cheap way: We exploit the fact that the desired frame matrix and | |
2540 | desired window matrices share their glyph memory. This is not | |
2541 | possible for current window matrices. Their glyphs are copied to | |
2542 | the desired frame matrix. The latter is equivalent to | |
2543 | preserve_other_columns in the old redisplay. | |
2544 | ||
2545 | Used glyphs counters for frame matrix rows are the result of adding | |
2546 | up glyph lengths of the window matrices. A line in the frame | |
2547 | matrix is enabled, if a corresponding line in a window matrix is | |
2548 | enabled. | |
177c0ea7 | 2549 | |
5f5c8ee5 GM |
2550 | After building the desired frame matrix, it will be passed to |
2551 | terminal code, which will manipulate both the desired and current | |
2552 | frame matrix. Changes applied to the frame's current matrix have | |
2553 | to be visible in current window matrices afterwards, of course. | |
2554 | ||
2555 | This problem is solved like this: | |
2556 | ||
2557 | 1. Window and frame matrices share glyphs. Window matrices are | |
2558 | constructed in a way that their glyph contents ARE the glyph | |
2559 | contents needed in a frame matrix. Thus, any modification of | |
2560 | glyphs done in terminal code will be reflected in window matrices | |
2561 | automatically. | |
177c0ea7 | 2562 | |
5f5c8ee5 GM |
2563 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2564 | intercepted by hook functions so that corresponding row operations | |
2565 | on window matrices can be performed. This is necessary because we | |
2566 | use pointers to glyphs in glyph row structures. To satisfy the | |
2567 | assumption of point 1 above that glyphs are updated implicitly in | |
2568 | window matrices when they are manipulated via the frame matrix, | |
2569 | window and frame matrix must of course agree where to find the | |
2570 | glyphs for their rows. Possible manipulations that must be | |
2571 | mirrored are assignments of rows of the desired frame matrix to the | |
2572 | current frame matrix and scrolling the current frame matrix. */ | |
2573 | ||
2574 | /* Build frame F's desired matrix from window matrices. Only windows | |
2575 | which have the flag must_be_updated_p set have to be updated. Menu | |
2576 | bar lines of a frame are not covered by window matrices, so make | |
2577 | sure not to touch them in this function. */ | |
2578 | ||
2579 | static void | |
971de7fb | 2580 | build_frame_matrix (struct frame *f) |
5f5c8ee5 GM |
2581 | { |
2582 | int i; | |
2583 | ||
2584 | /* F must have a frame matrix when this function is called. */ | |
2585 | xassert (!FRAME_WINDOW_P (f)); | |
177c0ea7 | 2586 | |
5f5c8ee5 GM |
2587 | /* Clear all rows in the frame matrix covered by window matrices. |
2588 | Menu bar lines are not covered by windows. */ | |
2589 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2590 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2591 | ||
2592 | /* Build the matrix by walking the window tree. */ | |
2593 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2594 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2595 | } | |
2596 | ||
2597 | ||
2598 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2599 | matrices. W is the root of a window tree. */ | |
2600 | ||
2601 | static void | |
971de7fb | 2602 | build_frame_matrix_from_window_tree (struct glyph_matrix *matrix, struct window *w) |
5f5c8ee5 GM |
2603 | { |
2604 | while (w) | |
2605 | { | |
2606 | if (!NILP (w->hchild)) | |
2607 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->hchild)); | |
2608 | else if (!NILP (w->vchild)) | |
2609 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->vchild)); | |
2610 | else | |
2611 | build_frame_matrix_from_leaf_window (matrix, w); | |
2612 | ||
2613 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2614 | } | |
2615 | } | |
2616 | ||
2617 | ||
2618 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2619 | desired frame matrix built. W is a leaf window whose desired or | |
2620 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2621 | must_be_updated_p determines which matrix it contributes to | |
2622 | FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix | |
2623 | is added to FRAME_MATRIX, otherwise W's current matrix is added. | |
2624 | Adding a desired matrix means setting up used counters and such in | |
2625 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2626 | means copying glyphs. The latter case corresponds to | |
2627 | preserve_other_columns in the old redisplay. */ | |
2628 | ||
2629 | static void | |
971de7fb | 2630 | build_frame_matrix_from_leaf_window (struct glyph_matrix *frame_matrix, struct window *w) |
5f5c8ee5 GM |
2631 | { |
2632 | struct glyph_matrix *window_matrix; | |
2633 | int window_y, frame_y; | |
2634 | /* If non-zero, a glyph to insert at the right border of W. */ | |
3fc809e2 KS |
2635 | GLYPH right_border_glyph; |
2636 | ||
2637 | SET_GLYPH_FROM_CHAR (right_border_glyph, 0); | |
5f5c8ee5 GM |
2638 | |
2639 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2640 | if (w->must_be_updated_p) | |
2641 | { | |
2642 | window_matrix = w->desired_matrix; | |
2643 | ||
2644 | /* Decide whether we want to add a vertical border glyph. */ | |
2645 | if (!WINDOW_RIGHTMOST_P (w)) | |
2646 | { | |
2647 | struct Lisp_Char_Table *dp = window_display_table (w); | |
3fc809e2 | 2648 | Lisp_Object gc; |
b4e49aee | 2649 | |
3fc809e2 KS |
2650 | SET_GLYPH_FROM_CHAR (right_border_glyph, '|'); |
2651 | if (dp | |
2652 | && (gc = DISP_BORDER_GLYPH (dp), GLYPH_CODE_P (gc)) | |
2653 | && GLYPH_CODE_CHAR_VALID_P (gc)) | |
2654 | { | |
2655 | SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph, gc); | |
2656 | spec_glyph_lookup_face (w, &right_border_glyph); | |
2657 | } | |
b4e49aee | 2658 | |
3fc809e2 KS |
2659 | if (GLYPH_FACE (right_border_glyph) <= 0) |
2660 | SET_GLYPH_FACE (right_border_glyph, VERTICAL_BORDER_FACE_ID); | |
5f5c8ee5 GM |
2661 | } |
2662 | } | |
2663 | else | |
2664 | window_matrix = w->current_matrix; | |
2665 | ||
2666 | /* For all rows in the window matrix and corresponding rows in the | |
2667 | frame matrix. */ | |
2668 | window_y = 0; | |
2669 | frame_y = window_matrix->matrix_y; | |
2670 | while (window_y < window_matrix->nrows) | |
2671 | { | |
2672 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2673 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
2a8bd25f | 2674 | int current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2675 | |
2676 | /* Fill up the frame row with spaces up to the left margin of the | |
2677 | window row. */ | |
2678 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2679 | ||
2680 | /* Fill up areas in the window matrix row with spaces. */ | |
2681 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2682 | |
2683 | /* If only part of W's desired matrix has been built, and | |
2684 | window_row wasn't displayed, use the corresponding current | |
2685 | row instead. */ | |
2686 | if (window_matrix == w->desired_matrix | |
2687 | && !window_row->enabled_p) | |
2688 | { | |
2689 | window_row = w->current_matrix->rows + window_y; | |
2690 | current_row_p = 1; | |
2691 | } | |
177c0ea7 | 2692 | |
2a8bd25f | 2693 | if (current_row_p) |
5f5c8ee5 | 2694 | { |
2a8bd25f | 2695 | /* Copy window row to frame row. */ |
72af86bd AS |
2696 | memcpy (frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, |
2697 | window_row->glyphs[0], | |
2698 | window_matrix->matrix_w * sizeof (struct glyph)); | |
5f5c8ee5 GM |
2699 | } |
2700 | else | |
2701 | { | |
2a8bd25f | 2702 | xassert (window_row->enabled_p); |
177c0ea7 | 2703 | |
2a8bd25f GM |
2704 | /* Only when a desired row has been displayed, we want |
2705 | the corresponding frame row to be updated. */ | |
2706 | frame_row->enabled_p = 1; | |
177c0ea7 | 2707 | |
5f5c8ee5 GM |
2708 | /* Maybe insert a vertical border between horizontally adjacent |
2709 | windows. */ | |
3fc809e2 | 2710 | if (GLYPH_CHAR (right_border_glyph) != 0) |
5f5c8ee5 GM |
2711 | { |
2712 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2713 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2714 | } | |
2715 | ||
498c08ea | 2716 | #if GLYPH_DEBUG |
a13396c9 GM |
2717 | /* Window row window_y must be a slice of frame row |
2718 | frame_y. */ | |
5f5c8ee5 | 2719 | xassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2720 | |
5f5c8ee5 GM |
2721 | /* If rows are in sync, we don't have to copy glyphs because |
2722 | frame and window share glyphs. */ | |
177c0ea7 | 2723 | |
a38634ff | 2724 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2725 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2726 | #endif |
5f5c8ee5 GM |
2727 | } |
2728 | ||
2729 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2730 | up with spaces, and visit leaf windows from left to right it | |
2731 | can be done simply. */ | |
177c0ea7 | 2732 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2733 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2734 | ||
5f5c8ee5 GM |
2735 | /* Next row. */ |
2736 | ++window_y; | |
2737 | ++frame_y; | |
2738 | } | |
2739 | } | |
2740 | ||
5f81871e RS |
2741 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2742 | ID, return a glyph that has a realized face ID. | |
2743 | This is used for glyphs displayed specially and not part of the text; | |
2744 | for instance, vertical separators, truncation markers, etc. */ | |
2745 | ||
3fc809e2 | 2746 | void |
971de7fb | 2747 | spec_glyph_lookup_face (struct window *w, GLYPH *glyph) |
5f81871e | 2748 | { |
3fc809e2 | 2749 | int lface_id = GLYPH_FACE (*glyph); |
5f81871e RS |
2750 | /* Convert the glyph's specified face to a realized (cache) face. */ |
2751 | if (lface_id > 0) | |
2752 | { | |
2753 | int face_id = merge_faces (XFRAME (w->frame), | |
2754 | Qt, lface_id, DEFAULT_FACE_ID); | |
3fc809e2 | 2755 | SET_GLYPH_FACE (*glyph, face_id); |
5f81871e | 2756 | } |
5f81871e | 2757 | } |
5f5c8ee5 GM |
2758 | |
2759 | /* Add spaces to a glyph row ROW in a window matrix. | |
2760 | ||
2761 | Each row has the form: | |
2762 | ||
2763 | +---------+-----------------------------+------------+ | |
2764 | | left | text | right | | |
2765 | +---------+-----------------------------+------------+ | |
2766 | ||
2767 | Left and right marginal areas are optional. This function adds | |
2768 | spaces to areas so that there are no empty holes between areas. | |
2769 | In other words: If the right area is not empty, the text area | |
2770 | is filled up with spaces up to the right area. If the text area | |
2771 | is not empty, the left area is filled up. | |
2772 | ||
2773 | To be called for frame-based redisplay, only. */ | |
2774 | ||
2775 | static void | |
971de7fb | 2776 | fill_up_glyph_row_with_spaces (struct glyph_row *row) |
5f5c8ee5 GM |
2777 | { |
2778 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2779 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2780 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2781 | } | |
2782 | ||
2783 | ||
2784 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2785 | frame-based redisplay only. */ | |
2786 | ||
2787 | static void | |
971de7fb | 2788 | fill_up_glyph_row_area_with_spaces (struct glyph_row *row, int area) |
5f5c8ee5 GM |
2789 | { |
2790 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2791 | { | |
2792 | struct glyph *end = row->glyphs[area + 1]; | |
2793 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2794 | ||
2795 | while (text < end) | |
2796 | *text++ = space_glyph; | |
2797 | row->used[area] = text - row->glyphs[area]; | |
2798 | } | |
2799 | } | |
2800 | ||
2801 | ||
2802 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2803 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2804 | ||
2805 | static void | |
971de7fb | 2806 | fill_up_frame_row_with_spaces (struct glyph_row *row, int upto) |
5f5c8ee5 GM |
2807 | { |
2808 | int i = row->used[TEXT_AREA]; | |
2809 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2810 | |
5f5c8ee5 GM |
2811 | while (i < upto) |
2812 | glyph[i++] = space_glyph; | |
2813 | ||
2814 | row->used[TEXT_AREA] = i; | |
2815 | } | |
2816 | ||
2817 | ||
2818 | \f | |
2819 | /********************************************************************** | |
2820 | Mirroring operations on frame matrices in window matrices | |
2821 | **********************************************************************/ | |
2822 | ||
2823 | /* Set frame being updated via frame-based redisplay to F. This | |
2824 | function must be called before updates to make explicit that we are | |
2825 | working on frame matrices or not. */ | |
2826 | ||
2827 | static INLINE void | |
971de7fb | 2828 | set_frame_matrix_frame (struct frame *f) |
5f5c8ee5 GM |
2829 | { |
2830 | frame_matrix_frame = f; | |
2831 | } | |
2832 | ||
2833 | ||
2834 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2835 | DESIRED_MATRIX is the desired matrix corresponding to | |
2836 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2837 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2838 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2839 | done in frame matrices, and that we have to perform analogous | |
2840 | operations in window matrices of frame_matrix_frame. */ | |
2841 | ||
2842 | static INLINE void | |
971de7fb | 2843 | make_current (struct glyph_matrix *desired_matrix, struct glyph_matrix *current_matrix, int row) |
5f5c8ee5 GM |
2844 | { |
2845 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2846 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
e876ff42 | 2847 | int mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2848 | |
2849 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2850 | between both rows, and does a structure assignment otherwise. */ | |
2851 | assign_row (current_row, desired_row); | |
2852 | ||
2853 | /* Enable current_row to mark it as valid. */ | |
2854 | current_row->enabled_p = 1; | |
e876ff42 | 2855 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2856 | |
2857 | /* If we are called on frame matrices, perform analogous operations | |
2858 | for window matrices. */ | |
2859 | if (frame_matrix_frame) | |
2860 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); | |
2861 | } | |
2862 | ||
2863 | ||
2864 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2865 | W's frame which has been made current (by swapping pointers between | |
2866 | current and desired matrix). Perform analogous operations in the | |
2867 | matrices of leaf windows in the window tree rooted at W. */ | |
2868 | ||
2869 | static void | |
971de7fb | 2870 | mirror_make_current (struct window *w, int frame_row) |
5f5c8ee5 GM |
2871 | { |
2872 | while (w) | |
2873 | { | |
2874 | if (!NILP (w->hchild)) | |
2875 | mirror_make_current (XWINDOW (w->hchild), frame_row); | |
2876 | else if (!NILP (w->vchild)) | |
2877 | mirror_make_current (XWINDOW (w->vchild), frame_row); | |
2878 | else | |
2879 | { | |
2880 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2881 | here because the checks performed in debug mode there | |
2882 | will not allow the conversion. */ | |
2883 | int row = frame_row - w->desired_matrix->matrix_y; | |
2884 | ||
2885 | /* If FRAME_ROW is within W, assign the desired row to the | |
2886 | current row (exchanging glyph pointers). */ | |
2887 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
2888 | { | |
2889 | struct glyph_row *current_row | |
2890 | = MATRIX_ROW (w->current_matrix, row); | |
2891 | struct glyph_row *desired_row | |
2892 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
2893 | |
2894 | if (desired_row->enabled_p) | |
2895 | assign_row (current_row, desired_row); | |
2896 | else | |
2897 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 GM |
2898 | current_row->enabled_p = 1; |
2899 | } | |
2900 | } | |
177c0ea7 | 2901 | |
5f5c8ee5 GM |
2902 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2903 | } | |
2904 | } | |
2905 | ||
2906 | ||
2907 | /* Perform row dance after scrolling. We are working on the range of | |
2908 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
2909 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
2910 | row I in the range 0 <= I < NLINES, the index of the original line | |
2911 | to move to I. This index is relative to the row range, i.e. 0 <= | |
2912 | index < NLINES. RETAINED_P is a vector containing zero for each | |
2913 | row 0 <= I < NLINES which is empty. | |
2914 | ||
2915 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 2916 | |
5f5c8ee5 GM |
2917 | void |
2918 | mirrored_line_dance (matrix, unchanged_at_top, nlines, copy_from, | |
2919 | retained_p) | |
2920 | struct glyph_matrix *matrix; | |
2921 | int unchanged_at_top, nlines; | |
2922 | int *copy_from; | |
2923 | char *retained_p; | |
2924 | { | |
2925 | /* A copy of original rows. */ | |
2926 | struct glyph_row *old_rows; | |
2927 | ||
2928 | /* Rows to assign to. */ | |
2929 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 2930 | |
5f5c8ee5 GM |
2931 | int i; |
2932 | ||
2933 | /* Make a copy of the original rows. */ | |
2934 | old_rows = (struct glyph_row *) alloca (nlines * sizeof *old_rows); | |
72af86bd | 2935 | memcpy (old_rows, new_rows, nlines * sizeof *old_rows); |
5f5c8ee5 GM |
2936 | |
2937 | /* Assign new rows, maybe clear lines. */ | |
2938 | for (i = 0; i < nlines; ++i) | |
2939 | { | |
2940 | int enabled_before_p = new_rows[i].enabled_p; | |
2941 | ||
2942 | xassert (i + unchanged_at_top < matrix->nrows); | |
2943 | xassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
2944 | new_rows[i] = old_rows[copy_from[i]]; | |
2945 | new_rows[i].enabled_p = enabled_before_p; | |
2946 | ||
2947 | /* RETAINED_P is zero for empty lines. */ | |
2948 | if (!retained_p[copy_from[i]]) | |
2949 | new_rows[i].enabled_p = 0; | |
2950 | } | |
2951 | ||
153a073c | 2952 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 GM |
2953 | if (frame_matrix_frame) |
2954 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), | |
2955 | unchanged_at_top, nlines, copy_from, retained_p); | |
2956 | } | |
2957 | ||
2958 | ||
a13396c9 | 2959 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 2960 | the current frame matrix. */ |
a13396c9 GM |
2961 | |
2962 | static void | |
971de7fb | 2963 | sync_window_with_frame_matrix_rows (struct window *w) |
a13396c9 GM |
2964 | { |
2965 | struct frame *f = XFRAME (w->frame); | |
2966 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
075c507b | 2967 | int left, right, x, width; |
a13396c9 | 2968 | |
5cb88111 | 2969 | /* Preconditions: W must be a leaf window on a tty frame. */ |
a13396c9 | 2970 | xassert (NILP (w->hchild) && NILP (w->vchild)); |
a13396c9 GM |
2971 | xassert (!FRAME_WINDOW_P (f)); |
2972 | ||
7df02016 KS |
2973 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
2974 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
2975 | x = w->current_matrix->matrix_x; |
2976 | width = w->current_matrix->matrix_w; | |
2977 | ||
a13396c9 GM |
2978 | window_row = w->current_matrix->rows; |
2979 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 2980 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 2981 | |
5cb88111 | 2982 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 2983 | { |
5cb88111 GM |
2984 | window_row->glyphs[LEFT_MARGIN_AREA] |
2985 | = frame_row->glyphs[0] + x; | |
2986 | window_row->glyphs[TEXT_AREA] | |
2987 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
2988 | window_row->glyphs[LAST_AREA] | |
2989 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
2990 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
2991 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
2992 | } |
2993 | } | |
2994 | ||
2995 | ||
2996 | /* Return the window in the window tree rooted in W containing frame | |
2997 | row ROW. Value is null if none is found. */ | |
2998 | ||
2999 | struct window * | |
971de7fb | 3000 | frame_row_to_window (struct window *w, int row) |
a13396c9 GM |
3001 | { |
3002 | struct window *found = NULL; | |
177c0ea7 | 3003 | |
a13396c9 GM |
3004 | while (w && !found) |
3005 | { | |
3006 | if (!NILP (w->hchild)) | |
3007 | found = frame_row_to_window (XWINDOW (w->hchild), row); | |
3008 | else if (!NILP (w->vchild)) | |
3009 | found = frame_row_to_window (XWINDOW (w->vchild), row); | |
7df02016 KS |
3010 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
3011 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 3012 | found = w; |
177c0ea7 | 3013 | |
a13396c9 GM |
3014 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3015 | } | |
3016 | ||
3017 | return found; | |
3018 | } | |
3019 | ||
3020 | ||
5f5c8ee5 GM |
3021 | /* Perform a line dance in the window tree rooted at W, after |
3022 | scrolling a frame matrix in mirrored_line_dance. | |
3023 | ||
3024 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
3025 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
3026 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
3027 | I < NLINES, the index of the original line to move to I. This | |
3028 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
3029 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
3030 | which is empty. */ | |
3031 | ||
3032 | static void | |
971de7fb | 3033 | mirror_line_dance (struct window *w, int unchanged_at_top, int nlines, int *copy_from, char *retained_p) |
5f5c8ee5 GM |
3034 | { |
3035 | while (w) | |
3036 | { | |
3037 | if (!NILP (w->hchild)) | |
3038 | mirror_line_dance (XWINDOW (w->hchild), unchanged_at_top, | |
3039 | nlines, copy_from, retained_p); | |
3040 | else if (!NILP (w->vchild)) | |
3041 | mirror_line_dance (XWINDOW (w->vchild), unchanged_at_top, | |
3042 | nlines, copy_from, retained_p); | |
3043 | else | |
3044 | { | |
3045 | /* W is a leaf window, and we are working on its current | |
3046 | matrix m. */ | |
3047 | struct glyph_matrix *m = w->current_matrix; | |
a13396c9 | 3048 | int i, sync_p = 0; |
5f5c8ee5 GM |
3049 | struct glyph_row *old_rows; |
3050 | ||
3051 | /* Make a copy of the original rows of matrix m. */ | |
3052 | old_rows = (struct glyph_row *) alloca (m->nrows * sizeof *old_rows); | |
72af86bd | 3053 | memcpy (old_rows, m->rows, m->nrows * sizeof *old_rows); |
5f5c8ee5 GM |
3054 | |
3055 | for (i = 0; i < nlines; ++i) | |
3056 | { | |
3057 | /* Frame relative line assigned to. */ | |
3058 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 3059 | |
5f5c8ee5 GM |
3060 | /* Frame relative line assigned. */ |
3061 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 3062 | |
5f5c8ee5 GM |
3063 | /* Window relative line assigned to. */ |
3064 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 3065 | |
5f5c8ee5 GM |
3066 | /* Window relative line assigned. */ |
3067 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 3068 | |
5f5c8ee5 GM |
3069 | /* Is assigned line inside window? */ |
3070 | int from_inside_window_p | |
3071 | = window_from >= 0 && window_from < m->matrix_h; | |
177c0ea7 | 3072 | |
a13396c9 GM |
3073 | /* Is assigned to line inside window? */ |
3074 | int to_inside_window_p | |
3075 | = window_to >= 0 && window_to < m->matrix_h; | |
177c0ea7 | 3076 | |
a13396c9 | 3077 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 3078 | { |
5f5c8ee5 GM |
3079 | /* Enabled setting before assignment. */ |
3080 | int enabled_before_p; | |
177c0ea7 | 3081 | |
5f5c8ee5 GM |
3082 | /* Do the assignment. The enabled_p flag is saved |
3083 | over the assignment because the old redisplay did | |
3084 | that. */ | |
3085 | enabled_before_p = m->rows[window_to].enabled_p; | |
3086 | m->rows[window_to] = old_rows[window_from]; | |
3087 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 3088 | |
5f5c8ee5 GM |
3089 | /* If frame line is empty, window line is empty, too. */ |
3090 | if (!retained_p[copy_from[i]]) | |
3091 | m->rows[window_to].enabled_p = 0; | |
3092 | } | |
a13396c9 GM |
3093 | else if (to_inside_window_p) |
3094 | { | |
3095 | /* A copy between windows. This is an infrequent | |
3096 | case not worth optimizing. */ | |
3097 | struct frame *f = XFRAME (w->frame); | |
3098 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); | |
3099 | struct window *w2; | |
3100 | struct glyph_matrix *m2; | |
3101 | int m2_from; | |
3102 | ||
fe8b8401 | 3103 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
3104 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
3105 | -nw', FROM_FRAME sometimes has no associated window. | |
3106 | This check avoids a segfault if W2 is null. */ | |
3107 | if (w2) | |
3108 | { | |
3109 | m2 = w2->current_matrix; | |
3110 | m2_from = frame_from - m2->matrix_y; | |
3111 | copy_row_except_pointers (m->rows + window_to, | |
3112 | m2->rows + m2_from); | |
3113 | ||
3114 | /* If frame line is empty, window line is empty, too. */ | |
3115 | if (!retained_p[copy_from[i]]) | |
3116 | m->rows[window_to].enabled_p = 0; | |
3117 | } | |
a13396c9 GM |
3118 | sync_p = 1; |
3119 | } | |
3120 | else if (from_inside_window_p) | |
3121 | sync_p = 1; | |
5f5c8ee5 | 3122 | } |
a13396c9 GM |
3123 | |
3124 | /* If there was a copy between windows, make sure glyph | |
3125 | pointers are in sync with the frame matrix. */ | |
3126 | if (sync_p) | |
3127 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 3128 | |
5f5c8ee5 GM |
3129 | /* Check that no pointers are lost. */ |
3130 | CHECK_MATRIX (m); | |
3131 | } | |
3132 | ||
3133 | /* Next window on same level. */ | |
3134 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3135 | } | |
3136 | } | |
3137 | ||
3138 | ||
3139 | #if GLYPH_DEBUG | |
3140 | ||
3141 | /* Check that window and frame matrices agree about their | |
3142 | understanding where glyphs of the rows are to find. For each | |
3143 | window in the window tree rooted at W, check that rows in the | |
3144 | matrices of leaf window agree with their frame matrices about | |
3145 | glyph pointers. */ | |
3146 | ||
3147 | void | |
3148 | check_window_matrix_pointers (w) | |
3149 | struct window *w; | |
3150 | { | |
3151 | while (w) | |
3152 | { | |
3153 | if (!NILP (w->hchild)) | |
3154 | check_window_matrix_pointers (XWINDOW (w->hchild)); | |
3155 | else if (!NILP (w->vchild)) | |
3156 | check_window_matrix_pointers (XWINDOW (w->vchild)); | |
3157 | else | |
60a8948a | 3158 | { |
5f5c8ee5 GM |
3159 | struct frame *f = XFRAME (w->frame); |
3160 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); | |
3161 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 3162 | } |
177c0ea7 | 3163 | |
5f5c8ee5 GM |
3164 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3165 | } | |
3166 | } | |
3167 | ||
3168 | ||
3169 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
3170 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
3171 | each row in WINDOW_MATRIX check that it's a slice of the | |
3172 | corresponding frame row. If it isn't, abort. */ | |
3173 | ||
3174 | static void | |
3175 | check_matrix_pointers (window_matrix, frame_matrix) | |
3176 | struct glyph_matrix *window_matrix, *frame_matrix; | |
3177 | { | |
3178 | /* Row number in WINDOW_MATRIX. */ | |
3179 | int i = 0; | |
3180 | ||
3181 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
3182 | int j = window_matrix->matrix_y; | |
3183 | ||
177c0ea7 | 3184 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
3185 | slice of the row in the frame matrix. If it isn't we didn't |
3186 | mirror an operation on the frame matrix correctly. */ | |
3187 | while (i < window_matrix->nrows) | |
3188 | { | |
3189 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
3190 | frame_matrix->rows + j)) | |
3191 | abort (); | |
3192 | ++i, ++j; | |
3193 | } | |
3194 | } | |
3195 | ||
3196 | #endif /* GLYPH_DEBUG != 0 */ | |
3197 | ||
3198 | ||
3199 | \f | |
3200 | /********************************************************************** | |
3201 | VPOS and HPOS translations | |
3202 | **********************************************************************/ | |
3203 | ||
3204 | #if GLYPH_DEBUG | |
3205 | ||
3206 | /* Translate vertical position VPOS which is relative to window W to a | |
3207 | vertical position relative to W's frame. */ | |
3208 | ||
3209 | static int | |
3210 | window_to_frame_vpos (w, vpos) | |
3211 | struct window *w; | |
3212 | int vpos; | |
3213 | { | |
3214 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 3215 | |
5f5c8ee5 GM |
3216 | xassert (!FRAME_WINDOW_P (f)); |
3217 | xassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); | |
7df02016 KS |
3218 | vpos += WINDOW_TOP_EDGE_LINE (w); |
3219 | xassert (vpos >= 0 && vpos <= FRAME_LINES (f)); | |
5f5c8ee5 GM |
3220 | return vpos; |
3221 | } | |
3222 | ||
3223 | ||
3224 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 3225 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
3226 | |
3227 | static int | |
3228 | window_to_frame_hpos (w, hpos) | |
3229 | struct window *w; | |
3230 | int hpos; | |
3231 | { | |
82f4a138 | 3232 | xassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 3233 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
3234 | return hpos; |
3235 | } | |
177c0ea7 | 3236 | |
5f5c8ee5 GM |
3237 | #endif /* GLYPH_DEBUG */ |
3238 | ||
3239 | ||
3240 | \f | |
3241 | /********************************************************************** | |
3242 | Redrawing Frames | |
3243 | **********************************************************************/ | |
3244 | ||
3245 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, | |
7ee72033 MB |
3246 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. */) |
3247 | (frame) | |
5f5c8ee5 GM |
3248 | Lisp_Object frame; |
3249 | { | |
3250 | struct frame *f; | |
3251 | ||
b7826503 | 3252 | CHECK_LIVE_FRAME (frame); |
5f5c8ee5 GM |
3253 | f = XFRAME (frame); |
3254 | ||
3255 | /* Ignore redraw requests, if frame has no glyphs yet. | |
3256 | (Implementation note: It still has to be checked why we are | |
3257 | called so early here). */ | |
3258 | if (!glyphs_initialized_initially_p) | |
3259 | return Qnil; | |
3260 | ||
3261 | update_begin (f); | |
3224dac1 | 3262 | #ifdef MSDOS |
f2adda5e | 3263 | if (FRAME_MSDOS_P (f)) |
79d39b69 | 3264 | FRAME_TERMINAL (f)->set_terminal_modes_hook (FRAME_TERMINAL (f)); |
3224dac1 | 3265 | #endif |
385ed61f | 3266 | clear_frame (f); |
5f5c8ee5 GM |
3267 | clear_current_matrices (f); |
3268 | update_end (f); | |
daf01701 | 3269 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3270 | fflush (FRAME_TTY (f)->output); |
5f5c8ee5 GM |
3271 | windows_or_buffers_changed++; |
3272 | /* Mark all windows as inaccurate, so that every window will have | |
3273 | its redisplay done. */ | |
3274 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
3275 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
3276 | f->garbaged = 0; | |
3277 | return Qnil; | |
3278 | } | |
3279 | ||
3280 | ||
3281 | /* Redraw frame F. This is nothing more than a call to the Lisp | |
3282 | function redraw-frame. */ | |
3283 | ||
3284 | void | |
971de7fb | 3285 | redraw_frame (struct frame *f) |
5f5c8ee5 GM |
3286 | { |
3287 | Lisp_Object frame; | |
3288 | XSETFRAME (frame, f); | |
3289 | Fredraw_frame (frame); | |
3290 | } | |
3291 | ||
3292 | ||
3293 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
7ee72033 MB |
3294 | doc: /* Clear and redisplay all visible frames. */) |
3295 | () | |
5f5c8ee5 GM |
3296 | { |
3297 | Lisp_Object tail, frame; | |
3298 | ||
3299 | FOR_EACH_FRAME (tail, frame) | |
3300 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
3301 | Fredraw_frame (frame); | |
3302 | ||
3303 | return Qnil; | |
3304 | } | |
3305 | ||
3306 | ||
3307 | /* This is used when frame_garbaged is set. Call Fredraw_frame on all | |
3308 | visible frames marked as garbaged. */ | |
3309 | ||
3310 | void | |
971de7fb | 3311 | redraw_garbaged_frames (void) |
5f5c8ee5 GM |
3312 | { |
3313 | Lisp_Object tail, frame; | |
3314 | ||
3315 | FOR_EACH_FRAME (tail, frame) | |
3316 | if (FRAME_VISIBLE_P (XFRAME (frame)) | |
3317 | && FRAME_GARBAGED_P (XFRAME (frame))) | |
3318 | Fredraw_frame (frame); | |
3319 | } | |
3320 | ||
3321 | ||
3322 | \f | |
5f5c8ee5 GM |
3323 | /*********************************************************************** |
3324 | Frame Update | |
3325 | ***********************************************************************/ | |
4588ec20 | 3326 | |
5f5c8ee5 | 3327 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 3328 | |
5f5c8ee5 GM |
3329 | If FORCE_P is non-zero, don't let redisplay be stopped by detecting |
3330 | pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try | |
3331 | scrolling. | |
177c0ea7 | 3332 | |
5f5c8ee5 | 3333 | Value is non-zero if redisplay was stopped due to pending input. */ |
4588ec20 | 3334 | |
5f5c8ee5 | 3335 | int |
971de7fb | 3336 | update_frame (struct frame *f, int force_p, int inhibit_hairy_id_p) |
5f5c8ee5 GM |
3337 | { |
3338 | /* 1 means display has been paused because of pending input. */ | |
3339 | int paused_p; | |
3340 | struct window *root_window = XWINDOW (f->root_window); | |
3341 | ||
a2130dbb KS |
3342 | if (redisplay_dont_pause) |
3343 | force_p = 1; | |
d012c62b | 3344 | #if PERIODIC_PREEMPTION_CHECKING |
a2130dbb KS |
3345 | else if (NILP (Vredisplay_preemption_period)) |
3346 | force_p = 1; | |
3347 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
3348 | { |
3349 | EMACS_TIME tm; | |
3350 | double p = XFLOATINT (Vredisplay_preemption_period); | |
3351 | int sec, usec; | |
3352 | ||
993d4ab6 KS |
3353 | if (detect_input_pending_ignore_squeezables ()) |
3354 | { | |
3355 | paused_p = 1; | |
3356 | goto do_pause; | |
3357 | } | |
3358 | ||
d012c62b KS |
3359 | sec = (int) p; |
3360 | usec = (p - sec) * 1000000; | |
3361 | ||
3362 | EMACS_GET_TIME (tm); | |
3363 | EMACS_SET_SECS_USECS (preemption_period, sec, usec); | |
3364 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
3365 | } | |
3366 | #endif | |
3367 | ||
5f5c8ee5 | 3368 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3369 | { |
5f5c8ee5 GM |
3370 | /* We are working on window matrix basis. All windows whose |
3371 | flag must_be_updated_p is set have to be updated. */ | |
3372 | ||
3373 | /* Record that we are not working on frame matrices. */ | |
3374 | set_frame_matrix_frame (NULL); | |
3375 | ||
3376 | /* Update all windows in the window tree of F, maybe stopping | |
3377 | when pending input is detected. */ | |
3378 | update_begin (f); | |
3379 | ||
3380 | /* Update the menu bar on X frames that don't have toolkit | |
3381 | support. */ | |
3382 | if (WINDOWP (f->menu_bar_window)) | |
3383 | update_window (XWINDOW (f->menu_bar_window), 1); | |
3384 | ||
3385 | /* Update the tool-bar window, if present. */ | |
9ea173e8 | 3386 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3387 | { |
9ea173e8 | 3388 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3389 | |
3390 | /* Update tool-bar window. */ | |
3391 | if (w->must_be_updated_p) | |
4588ec20 | 3392 | { |
153a073c PJ |
3393 | Lisp_Object tem; |
3394 | ||
5f5c8ee5 GM |
3395 | update_window (w, 1); |
3396 | w->must_be_updated_p = 0; | |
3397 | ||
3398 | /* Swap tool-bar strings. We swap because we want to | |
3399 | reuse strings. */ | |
9ea173e8 GM |
3400 | tem = f->current_tool_bar_string; |
3401 | f->current_tool_bar_string = f->desired_tool_bar_string; | |
3402 | f->desired_tool_bar_string = tem; | |
4588ec20 JB |
3403 | } |
3404 | } | |
177c0ea7 | 3405 | |
5f5c8ee5 GM |
3406 | |
3407 | /* Update windows. */ | |
3408 | paused_p = update_window_tree (root_window, force_p); | |
3409 | update_end (f); | |
177c0ea7 | 3410 | |
6b61353c | 3411 | /* This flush is a performance bottleneck under X, |
e581a466 | 3412 | and it doesn't seem to be necessary anyway (in general). |
6b61353c | 3413 | It is necessary when resizing the window with the mouse, or |
e581a466 | 3414 | at least the fringes are not redrawn in a timely manner. ++kfs */ |
6b61353c | 3415 | if (f->force_flush_display_p) |
e581a466 KL |
3416 | { |
3417 | FRAME_RIF (f)->flush_display (f); | |
3418 | f->force_flush_display_p = 0; | |
3419 | } | |
4588ec20 | 3420 | } |
5f5c8ee5 GM |
3421 | else |
3422 | { | |
3423 | /* We are working on frame matrix basis. Set the frame on whose | |
3424 | frame matrix we operate. */ | |
3425 | set_frame_matrix_frame (f); | |
3426 | ||
868dd24b | 3427 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3428 | build_frame_matrix (f); |
177c0ea7 | 3429 | |
868dd24b GM |
3430 | /* Update the display */ |
3431 | update_begin (f); | |
5f5c8ee5 | 3432 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3433 | update_end (f); |
3434 | ||
7d2f1216 | 3435 | if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f)) |
3224dac1 | 3436 | { |
0b0d3e0b KL |
3437 | if (FRAME_TTY (f)->termscript) |
3438 | fflush (FRAME_TTY (f)->termscript); | |
7d2f1216 EZ |
3439 | if (FRAME_TERMCAP_P (f)) |
3440 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3441 | } |
868dd24b | 3442 | |
5f5c8ee5 | 3443 | /* Check window matrices for lost pointers. */ |
2d5912c1 | 3444 | #if GLYPH_DEBUG |
9b0e97aa GM |
3445 | check_window_matrix_pointers (root_window); |
3446 | add_frame_display_history (f, paused_p); | |
3447 | #endif | |
5f5c8ee5 GM |
3448 | } |
3449 | ||
993d4ab6 | 3450 | do_pause: |
5f5c8ee5 GM |
3451 | /* Reset flags indicating that a window should be updated. */ |
3452 | set_window_update_flags (root_window, 0); | |
177c0ea7 | 3453 | |
868dd24b | 3454 | display_completed = !paused_p; |
5f5c8ee5 | 3455 | return paused_p; |
4588ec20 | 3456 | } |
5f5c8ee5 GM |
3457 | |
3458 | ||
4588ec20 | 3459 | \f |
5f5c8ee5 GM |
3460 | /************************************************************************ |
3461 | Window-based updates | |
3462 | ************************************************************************/ | |
3463 | ||
3464 | /* Perform updates in window tree rooted at W. FORCE_P non-zero means | |
3465 | don't stop updating when input is pending. */ | |
3466 | ||
3467 | static int | |
971de7fb | 3468 | update_window_tree (struct window *w, int force_p) |
5f5c8ee5 GM |
3469 | { |
3470 | int paused_p = 0; | |
177c0ea7 | 3471 | |
5f5c8ee5 GM |
3472 | while (w && !paused_p) |
3473 | { | |
3474 | if (!NILP (w->hchild)) | |
3475 | paused_p |= update_window_tree (XWINDOW (w->hchild), force_p); | |
3476 | else if (!NILP (w->vchild)) | |
3477 | paused_p |= update_window_tree (XWINDOW (w->vchild), force_p); | |
3478 | else if (w->must_be_updated_p) | |
3479 | paused_p |= update_window (w, force_p); | |
3480 | ||
3481 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3482 | } | |
3483 | ||
3484 | return paused_p; | |
3485 | } | |
3486 | ||
3487 | ||
3488 | /* Update window W if its flag must_be_updated_p is non-zero. If | |
3489 | FORCE_P is non-zero, don't stop updating if input is pending. */ | |
3490 | ||
3491 | void | |
971de7fb | 3492 | update_single_window (struct window *w, int force_p) |
5f5c8ee5 GM |
3493 | { |
3494 | if (w->must_be_updated_p) | |
3495 | { | |
3496 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
3497 | ||
3498 | /* Record that this is not a frame-based redisplay. */ | |
3499 | set_frame_matrix_frame (NULL); | |
3500 | ||
a2130dbb KS |
3501 | if (redisplay_dont_pause) |
3502 | force_p = 1; | |
d012c62b | 3503 | #if PERIODIC_PREEMPTION_CHECKING |
a2130dbb KS |
3504 | else if (NILP (Vredisplay_preemption_period)) |
3505 | force_p = 1; | |
3506 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
3507 | { |
3508 | EMACS_TIME tm; | |
3509 | double p = XFLOATINT (Vredisplay_preemption_period); | |
3510 | int sec, usec; | |
3511 | ||
3512 | sec = (int) p; | |
3513 | usec = (p - sec) * 1000000; | |
3514 | ||
3515 | EMACS_GET_TIME (tm); | |
3516 | EMACS_SET_SECS_USECS (preemption_period, sec, usec); | |
3517 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
3518 | } | |
3519 | #endif | |
3520 | ||
5f5c8ee5 GM |
3521 | /* Update W. */ |
3522 | update_begin (f); | |
3523 | update_window (w, force_p); | |
3524 | update_end (f); | |
4588ec20 | 3525 | |
5f5c8ee5 GM |
3526 | /* Reset flag in W. */ |
3527 | w->must_be_updated_p = 0; | |
3528 | } | |
3529 | } | |
4588ec20 | 3530 | |
93e023fc | 3531 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 3532 | |
408f5064 GM |
3533 | /* Redraw lines from the current matrix of window W that are |
3534 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
3535 | ||
3536 | static void | |
971de7fb | 3537 | redraw_overlapped_rows (struct window *w, int yb) |
408f5064 | 3538 | { |
d8ee7803 | 3539 | int i; |
fa971ac3 | 3540 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3fc809e2 | 3541 | |
408f5064 GM |
3542 | /* If rows overlapping others have been changed, the rows being |
3543 | overlapped have to be redrawn. This won't draw lines that have | |
3544 | already been drawn in update_window_line because overlapped_p in | |
3545 | desired rows is 0, so after row assignment overlapped_p in | |
3546 | current rows is 0. */ | |
3547 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
3548 | { | |
e876ff42 | 3549 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
3550 | |
3551 | if (!row->enabled_p) | |
3552 | break; | |
3553 | else if (row->mode_line_p) | |
3554 | continue; | |
177c0ea7 | 3555 | |
408f5064 GM |
3556 | if (row->overlapped_p) |
3557 | { | |
3558 | enum glyph_row_area area; | |
177c0ea7 | 3559 | |
408f5064 GM |
3560 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
3561 | { | |
3562 | updated_row = row; | |
3563 | updated_area = area; | |
fa971ac3 KL |
3564 | FRAME_RIF (f)->cursor_to (i, 0, row->y, |
3565 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 3566 | if (row->used[area]) |
fa971ac3 KL |
3567 | FRAME_RIF (f)->write_glyphs (row->glyphs[area], |
3568 | row->used[area]); | |
3569 | FRAME_RIF (f)->clear_end_of_line (-1); | |
408f5064 | 3570 | } |
177c0ea7 | 3571 | |
408f5064 GM |
3572 | row->overlapped_p = 0; |
3573 | } | |
3574 | ||
e876ff42 | 3575 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
3576 | break; |
3577 | } | |
3578 | } | |
3579 | ||
3580 | ||
3581 | /* Redraw lines from the current matrix of window W that overlap | |
3582 | others. YB is bottom-most y-position in W. */ | |
3583 | ||
3584 | static void | |
971de7fb | 3585 | redraw_overlapping_rows (struct window *w, int yb) |
408f5064 GM |
3586 | { |
3587 | int i, bottom_y; | |
3588 | struct glyph_row *row; | |
fa971ac3 | 3589 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
3fc809e2 | 3590 | |
408f5064 GM |
3591 | for (i = 0; i < w->current_matrix->nrows; ++i) |
3592 | { | |
3593 | row = w->current_matrix->rows + i; | |
3594 | ||
3595 | if (!row->enabled_p) | |
3596 | break; | |
3597 | else if (row->mode_line_p) | |
3598 | continue; | |
177c0ea7 | 3599 | |
408f5064 GM |
3600 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
3601 | ||
b4b2c2ca | 3602 | if (row->overlapping_p) |
408f5064 | 3603 | { |
41124e06 YM |
3604 | int overlaps = 0; |
3605 | ||
b4b2c2ca | 3606 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) && i > 0 |
41124e06 YM |
3607 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) |
3608 | overlaps |= OVERLAPS_PRED; | |
b4b2c2ca | 3609 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) && bottom_y < yb |
41124e06 YM |
3610 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) |
3611 | overlaps |= OVERLAPS_SUCC; | |
3612 | ||
3613 | if (overlaps) | |
3614 | { | |
3615 | if (row->used[LEFT_MARGIN_AREA]) | |
3616 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
3617 | ||
3618 | if (row->used[TEXT_AREA]) | |
3619 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
3620 | ||
3621 | if (row->used[RIGHT_MARGIN_AREA]) | |
3622 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
3623 | ||
3624 | /* Record in neighbour rows that ROW overwrites part of | |
3625 | their display. */ | |
3626 | if (overlaps & OVERLAPS_PRED) | |
3627 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
3628 | if (overlaps & OVERLAPS_SUCC) | |
3629 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
3630 | } | |
408f5064 GM |
3631 | } |
3632 | ||
3633 | if (bottom_y >= yb) | |
3634 | break; | |
3635 | } | |
3636 | } | |
3637 | ||
93e023fc KS |
3638 | #endif /* HAVE_WINDOW_SYSTEM */ |
3639 | ||
408f5064 | 3640 | |
93962bfa GM |
3641 | #ifdef GLYPH_DEBUG |
3642 | ||
3643 | /* Check that no row in the current matrix of window W is enabled | |
3644 | which is below what's displayed in the window. */ | |
3645 | ||
3646 | void | |
971de7fb | 3647 | check_current_matrix_flags (struct window *w) |
93962bfa GM |
3648 | { |
3649 | int last_seen_p = 0; | |
3650 | int i, yb = window_text_bottom_y (w); | |
3651 | ||
3652 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
3653 | { | |
3654 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
3655 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3656 | last_seen_p = 1; | |
3657 | else if (last_seen_p && row->enabled_p) | |
3658 | abort (); | |
3659 | } | |
3660 | } | |
3661 | ||
3662 | #endif /* GLYPH_DEBUG */ | |
3663 | ||
3664 | ||
5f5c8ee5 GM |
3665 | /* Update display of window W. FORCE_P non-zero means that we should |
3666 | not stop when detecting pending input. */ | |
3667 | ||
3668 | static int | |
971de7fb | 3669 | update_window (struct window *w, int force_p) |
4588ec20 | 3670 | { |
5f5c8ee5 GM |
3671 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
3672 | int paused_p; | |
d012c62b | 3673 | #if !PERIODIC_PREEMPTION_CHECKING |
5f5c8ee5 | 3674 | int preempt_count = baud_rate / 2400 + 1; |
d012c62b | 3675 | #endif |
5f5c8ee5 | 3676 | extern int input_pending; |
8fd9a666 | 3677 | extern Lisp_Object do_mouse_tracking; |
597cfb3f | 3678 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
b96fd3e8 | 3679 | #if GLYPH_DEBUG |
5f5c8ee5 | 3680 | /* Check that W's frame doesn't have glyph matrices. */ |
82f4a138 | 3681 | xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 3682 | #endif |
5f5c8ee5 GM |
3683 | |
3684 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb KS |
3685 | #if !PERIODIC_PREEMPTION_CHECKING |
3686 | if (!force_p) | |
a2d5fca0 | 3687 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3688 | #endif |
4588ec20 | 3689 | |
5f5c8ee5 GM |
3690 | /* If forced to complete the update, or if no input is pending, do |
3691 | the update. */ | |
8fd9a666 | 3692 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 3693 | { |
5f5c8ee5 GM |
3694 | struct glyph_row *row, *end; |
3695 | struct glyph_row *mode_line_row; | |
56974e03 | 3696 | struct glyph_row *header_line_row; |
e87b8809 | 3697 | int yb, changed_p = 0, mouse_face_overwritten_p = 0, n_updated; |
5f5c8ee5 GM |
3698 | |
3699 | rif->update_window_begin_hook (w); | |
3700 | yb = window_text_bottom_y (w); | |
3701 | ||
153a073c PJ |
3702 | /* If window has a header line, update it before everything else. |
3703 | Adjust y-positions of other rows by the header line height. */ | |
5f5c8ee5 GM |
3704 | row = desired_matrix->rows; |
3705 | end = row + desired_matrix->nrows - 1; | |
177c0ea7 | 3706 | |
5f5c8ee5 | 3707 | if (row->mode_line_p) |
56974e03 GM |
3708 | { |
3709 | header_line_row = row; | |
3710 | ++row; | |
3711 | } | |
3712 | else | |
3713 | header_line_row = NULL; | |
5f5c8ee5 GM |
3714 | |
3715 | /* Update the mode line, if necessary. */ | |
3716 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
3717 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
3718 | { | |
3719 | mode_line_row->y = yb; | |
3720 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
3721 | desired_matrix), |
3722 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3723 | } |
3724 | ||
3725 | /* Find first enabled row. Optimizations in redisplay_internal | |
3726 | may lead to an update with only one row enabled. There may | |
3727 | be also completely empty matrices. */ | |
3728 | while (row < end && !row->enabled_p) | |
3729 | ++row; | |
177c0ea7 | 3730 | |
bfdcafe1 | 3731 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 3732 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
3733 | { |
3734 | int rc = scrolling_window (w, header_line_row != NULL); | |
3735 | if (rc < 0) | |
3736 | { | |
3737 | /* All rows were found to be equal. */ | |
3738 | paused_p = 0; | |
3739 | goto set_cursor; | |
3740 | } | |
3741 | else if (rc > 0) | |
6b61353c KH |
3742 | { |
3743 | /* We've scrolled the display. */ | |
3744 | force_p = 1; | |
3745 | changed_p = 1; | |
3746 | } | |
5f5c8ee5 GM |
3747 | } |
3748 | ||
3749 | /* Update the rest of the lines. */ | |
e87b8809 | 3750 | for (n_updated = 0; row < end && (force_p || !input_pending); ++row) |
b7412313 | 3751 | if (row->enabled_p) |
5f5c8ee5 GM |
3752 | { |
3753 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
3754 | int i; | |
177c0ea7 | 3755 | |
153a073c | 3756 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
3757 | detect_input_pending. If it's done too often, |
3758 | scrolling large windows with repeated scroll-up | |
3759 | commands will too quickly pause redisplay. */ | |
d012c62b KS |
3760 | #if PERIODIC_PREEMPTION_CHECKING |
3761 | if (!force_p) | |
3762 | { | |
3763 | EMACS_TIME tm, dif; | |
3764 | EMACS_GET_TIME (tm); | |
3765 | EMACS_SUB_TIME (dif, preemption_next_check, tm); | |
3766 | if (EMACS_TIME_NEG_P (dif)) | |
3767 | { | |
3768 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
3769 | if (detect_input_pending_ignore_squeezables ()) |
3770 | break; | |
d012c62b KS |
3771 | } |
3772 | } | |
3773 | #else | |
e87b8809 | 3774 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 3775 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3776 | #endif |
e876ff42 GM |
3777 | changed_p |= update_window_line (w, vpos, |
3778 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3779 | |
3780 | /* Mark all rows below the last visible one in the current | |
3781 | matrix as invalid. This is necessary because of | |
3782 | variable line heights. Consider the case of three | |
3783 | successive redisplays, where the first displays 5 | |
3784 | lines, the second 3 lines, and the third 5 lines again. | |
3785 | If the second redisplay wouldn't mark rows in the | |
3786 | current matrix invalid, the third redisplay might be | |
3787 | tempted to optimize redisplay based on lines displayed | |
3788 | in the first redisplay. */ | |
3789 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3790 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
3791 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
3792 | } | |
3793 | ||
3794 | /* Was display preempted? */ | |
3795 | paused_p = row < end; | |
177c0ea7 | 3796 | |
56974e03 | 3797 | set_cursor: |
177c0ea7 | 3798 | |
6b61353c KH |
3799 | /* Update the header line after scrolling because a new header |
3800 | line would otherwise overwrite lines at the top of the window | |
3801 | that can be scrolled. */ | |
3802 | if (header_line_row && header_line_row->enabled_p) | |
3803 | { | |
3804 | header_line_row->y = 0; | |
3805 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
6b61353c KH |
3806 | } |
3807 | ||
153a073c | 3808 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
3809 | if (!paused_p && !w->pseudo_window_p) |
3810 | { | |
93e023fc | 3811 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
3812 | if (changed_p && rif->fix_overlapping_area) |
3813 | { | |
3814 | redraw_overlapped_rows (w, yb); | |
3815 | redraw_overlapping_rows (w, yb); | |
3816 | } | |
93e023fc | 3817 | #endif |
177c0ea7 | 3818 | |
5f5c8ee5 GM |
3819 | /* Make cursor visible at cursor position of W. */ |
3820 | set_window_cursor_after_update (w); | |
3821 | ||
e876ff42 GM |
3822 | #if 0 /* Check that current matrix invariants are satisfied. This is |
3823 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
3824 | IF_DEBUG (check_matrix_invariants (w)); |
3825 | #endif | |
4588ec20 | 3826 | } |
5f5c8ee5 GM |
3827 | |
3828 | #if GLYPH_DEBUG | |
3829 | /* Remember the redisplay method used to display the matrix. */ | |
3830 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
3831 | #endif | |
408f5064 | 3832 | |
6b61353c KH |
3833 | #ifdef HAVE_WINDOW_SYSTEM |
3834 | update_window_fringes (w, 0); | |
3835 | #endif | |
3836 | ||
56974e03 GM |
3837 | /* End the update of window W. Don't set the cursor if we |
3838 | paused updating the display because in this case, | |
3839 | set_window_cursor_after_update hasn't been called, and | |
3840 | output_cursor doesn't contain the cursor location. */ | |
3841 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); | |
4588ec20 | 3842 | } |
5f5c8ee5 GM |
3843 | else |
3844 | paused_p = 1; | |
3845 | ||
2d5912c1 | 3846 | #if GLYPH_DEBUG |
0cffd9d8 | 3847 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
3848 | add_window_display_history (w, w->current_matrix->method, paused_p); |
3849 | #endif | |
177c0ea7 | 3850 | |
5f5c8ee5 | 3851 | clear_glyph_matrix (desired_matrix); |
408f5064 | 3852 | |
5f5c8ee5 | 3853 | return paused_p; |
4588ec20 JB |
3854 | } |
3855 | ||
b64b3980 | 3856 | |
5f5c8ee5 GM |
3857 | /* Update the display of area AREA in window W, row number VPOS. |
3858 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
3859 | ||
3860 | static void | |
971de7fb | 3861 | update_marginal_area (struct window *w, int area, int vpos) |
b64b3980 | 3862 | { |
5f5c8ee5 | 3863 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 3864 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
3865 | |
3866 | /* Let functions in xterm.c know what area subsequent X positions | |
3867 | will be relative to. */ | |
3868 | updated_area = area; | |
3869 | ||
3870 | /* Set cursor to start of glyphs, write them, and clear to the end | |
3871 | of the area. I don't think that something more sophisticated is | |
3872 | necessary here, since marginal areas will not be the default. */ | |
3873 | rif->cursor_to (vpos, 0, desired_row->y, 0); | |
3874 | if (desired_row->used[area]) | |
3875 | rif->write_glyphs (desired_row->glyphs[area], desired_row->used[area]); | |
3876 | rif->clear_end_of_line (-1); | |
b64b3980 | 3877 | } |
23b0200c | 3878 | |
352f1545 | 3879 | |
408f5064 GM |
3880 | /* Update the display of the text area of row VPOS in window W. |
3881 | Value is non-zero if display has changed. */ | |
5f5c8ee5 | 3882 | |
408f5064 | 3883 | static int |
971de7fb | 3884 | update_text_area (struct window *w, int vpos) |
23b0200c | 3885 | { |
5f5c8ee5 GM |
3886 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
3887 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3888 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 3889 | int changed_p = 0; |
5f5c8ee5 GM |
3890 | |
3891 | /* Let functions in xterm.c know what area subsequent X positions | |
3892 | will be relative to. */ | |
3893 | updated_area = TEXT_AREA; | |
177c0ea7 | 3894 | |
5f5c8ee5 GM |
3895 | /* If rows are at different X or Y, or rows have different height, |
3896 | or the current row is marked invalid, write the entire line. */ | |
3897 | if (!current_row->enabled_p | |
3898 | || desired_row->y != current_row->y | |
3899 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
3900 | || desired_row->phys_ascent != current_row->phys_ascent |
3901 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 3902 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 3903 | || current_row->overlapped_p |
fee8b690 CY |
3904 | /* This next line is necessary for correctly redrawing |
3905 | mouse-face areas after scrolling and other operations. | |
3906 | However, it causes excessive flickering when mouse is moved | |
3907 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
3908 | line doesn't seem to hurt anything. -- cyd. |
3909 | But it is still needed for the header line. -- kfs. */ | |
3910 | || (current_row->mouse_face_p | |
3911 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
3912 | || current_row->x != desired_row->x) |
3913 | { | |
3914 | rif->cursor_to (vpos, 0, desired_row->y, desired_row->x); | |
177c0ea7 | 3915 | |
5f5c8ee5 GM |
3916 | if (desired_row->used[TEXT_AREA]) |
3917 | rif->write_glyphs (desired_row->glyphs[TEXT_AREA], | |
3918 | desired_row->used[TEXT_AREA]); | |
177c0ea7 | 3919 | |
5f5c8ee5 GM |
3920 | /* Clear to end of window. */ |
3921 | rif->clear_end_of_line (-1); | |
408f5064 | 3922 | changed_p = 1; |
60f2f3f1 GM |
3923 | |
3924 | /* This erases the cursor. We do this here because | |
3925 | notice_overwritten_cursor cannot easily check this, which | |
3926 | might indicate that the whole functionality of | |
3927 | notice_overwritten_cursor would better be implemented here. | |
3928 | On the other hand, we need notice_overwritten_cursor as long | |
3929 | as mouse highlighting is done asynchronously outside of | |
3930 | redisplay. */ | |
3931 | if (vpos == w->phys_cursor.vpos) | |
3932 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
3933 | } |
3934 | else | |
3935 | { | |
3936 | int stop, i, x; | |
3937 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
3938 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
e47306e6 | 3939 | int overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 3940 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
91d227d9 | 3941 | int abort_skipping = 0; |
5f5c8ee5 | 3942 | |
78897758 YM |
3943 | /* If the desired row extends its face to the text area end, and |
3944 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
3945 | make sure we write at least one glyph, so that the face |
3946 | extension actually takes place. */ | |
78897758 YM |
3947 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
3948 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
3949 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
3950 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 3951 | --desired_stop_pos; |
177c0ea7 | 3952 | |
5f5c8ee5 GM |
3953 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
3954 | i = 0; | |
3955 | x = desired_row->x; | |
8399f8a0 GM |
3956 | |
3957 | /* Loop over glyphs that current and desired row may have | |
3958 | in common. */ | |
5f5c8ee5 | 3959 | while (i < stop) |
352f1545 | 3960 | { |
91d227d9 | 3961 | int can_skip_p = !abort_skipping; |
177c0ea7 | 3962 | |
5f5c8ee5 | 3963 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
3964 | don't have to be written. We can't skip if the last |
3965 | current glyph overlaps the glyph to its right. For | |
3966 | example, consider a current row of `if ' with the `f' in | |
3967 | Courier bold so that it overlaps the ` ' to its right. | |
3968 | If the desired row is ` ', we would skip over the space | |
3969 | after the `if' and there would remain a pixel from the | |
3970 | `f' on the screen. */ | |
3971 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 3972 | { |
e47306e6 GM |
3973 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
3974 | int left, right; | |
177c0ea7 | 3975 | |
e47306e6 GM |
3976 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
3977 | &left, &right); | |
91d227d9 | 3978 | can_skip_p = (right == 0 && !abort_skipping); |
352f1545 | 3979 | } |
177c0ea7 | 3980 | |
6d950f4c | 3981 | if (can_skip_p) |
352f1545 | 3982 | { |
91d227d9 CY |
3983 | int start_hpos = i; |
3984 | ||
6d950f4c GM |
3985 | while (i < stop |
3986 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
3987 | { | |
3988 | x += desired_glyph->pixel_width; | |
3989 | ++desired_glyph, ++current_glyph, ++i; | |
3990 | } | |
3991 | ||
3992 | /* Consider the case that the current row contains "xxx | |
3993 | ppp ggg" in italic Courier font, and the desired row | |
3994 | is "xxx ggg". The character `p' has lbearing, `g' | |
3995 | has not. The loop above will stop in front of the | |
3996 | first `p' in the current row. If we would start | |
3997 | writing glyphs there, we wouldn't erase the lbearing | |
3998 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 3999 | taken care of by draw_glyphs. */ |
6d950f4c GM |
4000 | if (overlapping_glyphs_p |
4001 | && i > 0 | |
4002 | && i < current_row->used[TEXT_AREA] | |
4003 | && (current_row->used[TEXT_AREA] | |
4004 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 4005 | { |
6d950f4c | 4006 | int left, right; |
177c0ea7 | 4007 | |
6d950f4c GM |
4008 | rif->get_glyph_overhangs (current_glyph, XFRAME (w->frame), |
4009 | &left, &right); | |
4010 | while (left > 0 && i > 0) | |
4011 | { | |
4012 | --i, --desired_glyph, --current_glyph; | |
4013 | x -= desired_glyph->pixel_width; | |
4014 | left -= desired_glyph->pixel_width; | |
4015 | } | |
91d227d9 CY |
4016 | |
4017 | /* Abort the skipping algorithm if we end up before | |
4018 | our starting point, to avoid looping (bug#1070). | |
4019 | This can happen when the lbearing is larger than | |
4020 | the pixel width. */ | |
4021 | abort_skipping = (i < start_hpos); | |
5f5c8ee5 | 4022 | } |
352f1545 | 4023 | } |
177c0ea7 | 4024 | |
5f5c8ee5 GM |
4025 | /* Try to avoid writing the entire rest of the desired row |
4026 | by looking for a resync point. This mainly prevents | |
4027 | mode line flickering in the case the mode line is in | |
4028 | fixed-pitch font, which it usually will be. */ | |
4029 | if (i < desired_row->used[TEXT_AREA]) | |
4030 | { | |
4031 | int start_x = x, start_hpos = i; | |
4032 | struct glyph *start = desired_glyph; | |
4033 | int current_x = x; | |
6d950f4c GM |
4034 | int skip_first_p = !can_skip_p; |
4035 | ||
5f5c8ee5 GM |
4036 | /* Find the next glyph that's equal again. */ |
4037 | while (i < stop | |
6d950f4c GM |
4038 | && (skip_first_p |
4039 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
4040 | && x == current_x) |
4041 | { | |
4042 | x += desired_glyph->pixel_width; | |
4043 | current_x += current_glyph->pixel_width; | |
4044 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 4045 | skip_first_p = 0; |
5f5c8ee5 | 4046 | } |
23b0200c | 4047 | |
5f5c8ee5 GM |
4048 | if (i == start_hpos || x != current_x) |
4049 | { | |
4050 | i = start_hpos; | |
4051 | x = start_x; | |
4052 | desired_glyph = start; | |
4053 | break; | |
4054 | } | |
e47306e6 | 4055 | |
5f5c8ee5 GM |
4056 | rif->cursor_to (vpos, start_hpos, desired_row->y, start_x); |
4057 | rif->write_glyphs (start, i - start_hpos); | |
408f5064 | 4058 | changed_p = 1; |
5f5c8ee5 GM |
4059 | } |
4060 | } | |
177c0ea7 | 4061 | |
5f5c8ee5 GM |
4062 | /* Write the rest. */ |
4063 | if (i < desired_row->used[TEXT_AREA]) | |
4064 | { | |
4065 | rif->cursor_to (vpos, i, desired_row->y, x); | |
4066 | rif->write_glyphs (desired_glyph, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 4067 | changed_p = 1; |
5f5c8ee5 | 4068 | } |
177c0ea7 | 4069 | |
5f5c8ee5 GM |
4070 | /* Maybe clear to end of line. */ |
4071 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
4072 | { | |
4073 | /* If new row extends to the end of the text area, nothing | |
4074 | has to be cleared, if and only if we did a write_glyphs | |
4075 | above. This is made sure by setting desired_stop_pos | |
4076 | appropriately above. */ | |
78897758 YM |
4077 | xassert (i < desired_row->used[TEXT_AREA] |
4078 | || ((desired_row->used[TEXT_AREA] | |
4079 | == current_row->used[TEXT_AREA]) | |
4080 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
4081 | } |
4082 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
4083 | { | |
4084 | /* If old row extends to the end of the text area, clear. */ | |
4085 | if (i >= desired_row->used[TEXT_AREA]) | |
4086 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 4087 | desired_row->pixel_width); |
5f5c8ee5 | 4088 | rif->clear_end_of_line (-1); |
408f5064 | 4089 | changed_p = 1; |
5f5c8ee5 GM |
4090 | } |
4091 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 4092 | { |
5f5c8ee5 GM |
4093 | /* Otherwise clear to the end of the old row. Everything |
4094 | after that position should be clear already. */ | |
4095 | int x; | |
177c0ea7 | 4096 | |
5f5c8ee5 GM |
4097 | if (i >= desired_row->used[TEXT_AREA]) |
4098 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 4099 | desired_row->pixel_width); |
5f5c8ee5 GM |
4100 | |
4101 | /* If cursor is displayed at the end of the line, make sure | |
4102 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
4103 | with which to erase the cursor (because this method | |
4104 | doesn't work with lbearing/rbearing), so we must do it | |
4105 | this way. */ | |
4106 | if (vpos == w->phys_cursor.vpos | |
f951a506 EZ |
4107 | && (desired_row->reversed_p |
4108 | ? (w->phys_cursor.hpos < 0) | |
4109 | : (w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]))) | |
5f5c8ee5 GM |
4110 | { |
4111 | w->phys_cursor_on_p = 0; | |
4112 | x = -1; | |
4113 | } | |
4114 | else | |
6b61353c | 4115 | x = current_row->pixel_width; |
5f5c8ee5 | 4116 | rif->clear_end_of_line (x); |
408f5064 | 4117 | changed_p = 1; |
2e8907d3 | 4118 | } |
23b0200c | 4119 | } |
408f5064 GM |
4120 | |
4121 | return changed_p; | |
23b0200c | 4122 | } |
4588ec20 | 4123 | |
5f5c8ee5 | 4124 | |
408f5064 GM |
4125 | /* Update row VPOS in window W. Value is non-zero if display has been |
4126 | changed. */ | |
5f5c8ee5 | 4127 | |
408f5064 | 4128 | static int |
971de7fb | 4129 | update_window_line (struct window *w, int vpos, int *mouse_face_overwritten_p) |
5f5c8ee5 GM |
4130 | { |
4131 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
4132 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 4133 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 4134 | int changed_p = 0; |
5f5c8ee5 | 4135 | |
5f5c8ee5 GM |
4136 | /* Set the row being updated. This is important to let xterm.c |
4137 | know what line height values are in effect. */ | |
4138 | updated_row = desired_row; | |
4139 | ||
177c0ea7 JB |
4140 | /* A row can be completely invisible in case a desired matrix was |
4141 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
4142 | the matrix. Make sure to make such rows current anyway, since |
4143 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
4144 | if (desired_row->mode_line_p |
4145 | || desired_row->visible_height > 0) | |
408f5064 | 4146 | { |
504805ac GM |
4147 | xassert (desired_row->enabled_p); |
4148 | ||
4149 | /* Update display of the left margin area, if there is one. */ | |
4150 | if (!desired_row->full_width_p | |
7df02016 | 4151 | && !NILP (w->left_margin_cols)) |
504805ac GM |
4152 | { |
4153 | changed_p = 1; | |
4154 | update_marginal_area (w, LEFT_MARGIN_AREA, vpos); | |
4155 | } | |
177c0ea7 | 4156 | |
504805ac GM |
4157 | /* Update the display of the text area. */ |
4158 | if (update_text_area (w, vpos)) | |
4159 | { | |
4160 | changed_p = 1; | |
4161 | if (current_row->mouse_face_p) | |
4162 | *mouse_face_overwritten_p = 1; | |
4163 | } | |
177c0ea7 | 4164 | |
504805ac GM |
4165 | /* Update display of the right margin area, if there is one. */ |
4166 | if (!desired_row->full_width_p | |
7df02016 | 4167 | && !NILP (w->right_margin_cols)) |
504805ac GM |
4168 | { |
4169 | changed_p = 1; | |
4170 | update_marginal_area (w, RIGHT_MARGIN_AREA, vpos); | |
4171 | } | |
177c0ea7 | 4172 | |
504805ac GM |
4173 | /* Draw truncation marks etc. */ |
4174 | if (!current_row->enabled_p | |
4175 | || desired_row->y != current_row->y | |
4176 | || desired_row->visible_height != current_row->visible_height | |
6b61353c | 4177 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 4178 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
6b61353c | 4179 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 4180 | || desired_row->mode_line_p != current_row->mode_line_p |
6b61353c | 4181 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
4182 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
4183 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
4184 | rif->after_update_window_line_hook (desired_row); | |
408f5064 | 4185 | } |
177c0ea7 | 4186 | |
5f5c8ee5 GM |
4187 | /* Update current_row from desired_row. */ |
4188 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
4189 | updated_row = NULL; | |
408f5064 | 4190 | return changed_p; |
5f5c8ee5 GM |
4191 | } |
4192 | ||
4193 | ||
4194 | /* Set the cursor after an update of window W. This function may only | |
4195 | be called from update_window. */ | |
4196 | ||
4197 | static void | |
971de7fb | 4198 | set_window_cursor_after_update (struct window *w) |
4588ec20 | 4199 | { |
5f5c8ee5 | 4200 | struct frame *f = XFRAME (w->frame); |
fa971ac3 | 4201 | struct redisplay_interface *rif = FRAME_RIF (f); |
5f5c8ee5 GM |
4202 | int cx, cy, vpos, hpos; |
4203 | ||
4204 | /* Not intended for frame matrix updates. */ | |
4205 | xassert (FRAME_WINDOW_P (f)); | |
177c0ea7 | 4206 | |
b96fd3e8 GM |
4207 | if (cursor_in_echo_area |
4208 | && !NILP (echo_area_buffer[0]) | |
4209 | /* If we are showing a message instead of the mini-buffer, | |
4210 | show the cursor for the message instead. */ | |
4211 | && XWINDOW (minibuf_window) == w | |
4212 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
4213 | /* These cases apply only to the frame that contains |
4214 | the active mini-buffer window. */ | |
4215 | && FRAME_HAS_MINIBUF_P (f) | |
4216 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
4217 | { | |
4218 | cx = cy = vpos = hpos = 0; | |
4219 | ||
4220 | if (cursor_in_echo_area >= 0) | |
4221 | { | |
4222 | /* If the mini-buffer is several lines high, find the last | |
4223 | line that has any text on it. Note: either all lines | |
4224 | are enabled or none. Otherwise we wouldn't be able to | |
4225 | determine Y. */ | |
862b4790 GM |
4226 | struct glyph_row *row, *last_row; |
4227 | struct glyph *glyph; | |
4228 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 4229 | |
862b4790 | 4230 | last_row = NULL; |
6206f8ce GM |
4231 | row = w->current_matrix->rows; |
4232 | while (row->enabled_p | |
4233 | && (last_row == NULL | |
4234 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 4235 | { |
862b4790 GM |
4236 | if (row->used[TEXT_AREA] |
4237 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
4238 | last_row = row; | |
6206f8ce | 4239 | ++row; |
862b4790 | 4240 | } |
177c0ea7 | 4241 | |
5f5c8ee5 GM |
4242 | if (last_row) |
4243 | { | |
6206f8ce GM |
4244 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
4245 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 4246 | |
b96fd3e8 | 4247 | while (last > start && last->charpos < 0) |
862b4790 | 4248 | --last; |
177c0ea7 | 4249 | |
862b4790 GM |
4250 | for (glyph = start; glyph < last; ++glyph) |
4251 | { | |
4252 | cx += glyph->pixel_width; | |
4253 | ++hpos; | |
4254 | } | |
4255 | ||
5f5c8ee5 | 4256 | cy = last_row->y; |
862b4790 | 4257 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
4258 | } |
4259 | } | |
4260 | } | |
4261 | else | |
4262 | { | |
4263 | cx = w->cursor.x; | |
4264 | cy = w->cursor.y; | |
4265 | hpos = w->cursor.hpos; | |
4266 | vpos = w->cursor.vpos; | |
4267 | } | |
4588ec20 | 4268 | |
5f5c8ee5 | 4269 | /* Window cursor can be out of sync for horizontally split windows. */ |
f951a506 | 4270 | hpos = max (-1, hpos); /* -1 is for when cursor is on the left fringe */ |
5f5c8ee5 GM |
4271 | hpos = min (w->current_matrix->matrix_w - 1, hpos); |
4272 | vpos = max (0, vpos); | |
4273 | vpos = min (w->current_matrix->nrows - 1, vpos); | |
4274 | rif->cursor_to (vpos, hpos, cy, cx); | |
4588ec20 | 4275 | } |
4588ec20 | 4276 | |
5f5c8ee5 | 4277 | |
6df5d75f GM |
4278 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window |
4279 | tree rooted at W. */ | |
4280 | ||
4281 | void | |
971de7fb | 4282 | set_window_update_flags (struct window *w, int on_p) |
6df5d75f GM |
4283 | { |
4284 | while (w) | |
4285 | { | |
4286 | if (!NILP (w->hchild)) | |
4287 | set_window_update_flags (XWINDOW (w->hchild), on_p); | |
4288 | else if (!NILP (w->vchild)) | |
4289 | set_window_update_flags (XWINDOW (w->vchild), on_p); | |
4290 | else | |
4291 | w->must_be_updated_p = on_p; | |
4292 | ||
4293 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
4294 | } | |
177c0ea7 | 4295 | } |
6df5d75f GM |
4296 | |
4297 | ||
4298 | \f | |
4299 | /*********************************************************************** | |
4300 | Window-Based Scrolling | |
4301 | ***********************************************************************/ | |
4302 | ||
4303 | /* Structure describing rows in scrolling_window. */ | |
4304 | ||
4305 | struct row_entry | |
4306 | { | |
4307 | /* Number of occurrences of this row in desired and current matrix. */ | |
4308 | int old_uses, new_uses; | |
177c0ea7 | 4309 | |
6df5d75f GM |
4310 | /* Vpos of row in new matrix. */ |
4311 | int new_line_number; | |
4312 | ||
4313 | /* Bucket index of this row_entry in the hash table row_table. */ | |
4314 | int bucket; | |
177c0ea7 | 4315 | |
6df5d75f GM |
4316 | /* The row described by this entry. */ |
4317 | struct glyph_row *row; | |
177c0ea7 | 4318 | |
6df5d75f GM |
4319 | /* Hash collision chain. */ |
4320 | struct row_entry *next; | |
4321 | }; | |
4322 | ||
4323 | /* A pool to allocate row_entry structures from, and the size of the | |
4324 | pool. The pool is reallocated in scrolling_window when we find | |
4325 | that we need a larger one. */ | |
4326 | ||
4327 | static struct row_entry *row_entry_pool; | |
4328 | static int row_entry_pool_size; | |
4329 | ||
4330 | /* Index of next free entry in row_entry_pool. */ | |
4331 | ||
4332 | static int row_entry_idx; | |
4333 | ||
4334 | /* The hash table used during scrolling, and the table's size. This | |
4335 | table is used to quickly identify equal rows in the desired and | |
4336 | current matrix. */ | |
4337 | ||
4338 | static struct row_entry **row_table; | |
4339 | static int row_table_size; | |
4340 | ||
4341 | /* Vectors of pointers to row_entry structures belonging to the | |
4342 | current and desired matrix, and the size of the vectors. */ | |
4343 | ||
4344 | static struct row_entry **old_lines, **new_lines; | |
4345 | static int old_lines_size, new_lines_size; | |
4346 | ||
4347 | /* A pool to allocate run structures from, and its size. */ | |
4348 | ||
4349 | static struct run *run_pool; | |
4350 | static int runs_size; | |
4351 | ||
4352 | /* A vector of runs of lines found during scrolling. */ | |
4353 | ||
4354 | static struct run **runs; | |
4355 | ||
6df5d75f GM |
4356 | /* Add glyph row ROW to the scrolling hash table during the scrolling |
4357 | of window W. */ | |
4358 | ||
4359 | static INLINE struct row_entry * | |
971de7fb | 4360 | add_row_entry (struct window *w, struct glyph_row *row) |
6df5d75f GM |
4361 | { |
4362 | struct row_entry *entry; | |
4363 | int i = row->hash % row_table_size; | |
177c0ea7 | 4364 | |
6df5d75f | 4365 | entry = row_table[i]; |
e4e0bee9 | 4366 | while (entry && !row_equal_p (w, entry->row, row, 1)) |
6df5d75f | 4367 | entry = entry->next; |
177c0ea7 | 4368 | |
6df5d75f GM |
4369 | if (entry == NULL) |
4370 | { | |
4371 | entry = row_entry_pool + row_entry_idx++; | |
4372 | entry->row = row; | |
4373 | entry->old_uses = entry->new_uses = 0; | |
4374 | entry->new_line_number = 0; | |
4375 | entry->bucket = i; | |
4376 | entry->next = row_table[i]; | |
4377 | row_table[i] = entry; | |
4378 | } | |
4379 | ||
4380 | return entry; | |
4381 | } | |
4382 | ||
4383 | ||
5f5c8ee5 | 4384 | /* Try to reuse part of the current display of W by scrolling lines. |
153a073c | 4385 | HEADER_LINE_P non-zero means W has a header line. |
5f5c8ee5 GM |
4386 | |
4387 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4388 | Technique for Isolating Differences Between Files." It should take | |
4389 | O(N) time. | |
4390 | ||
4391 | A short outline of the steps of the algorithm | |
4392 | ||
4393 | 1. Skip lines equal at the start and end of both matrices. | |
4394 | ||
4395 | 2. Enter rows in the current and desired matrix into a symbol | |
4396 | table, counting how often they appear in both matrices. | |
4397 | ||
4398 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4399 | i.e. we assume that such lines are likely to have been moved. | |
4400 | ||
4401 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4402 | forward and backward. | |
4403 | ||
4404 | Value is | |
4405 | ||
4406 | -1 if all rows were found to be equal. | |
4407 | 0 to indicate that we did not scroll the display, or | |
4408 | 1 if we did scroll. */ | |
4409 | ||
4410 | static int | |
971de7fb | 4411 | scrolling_window (struct window *w, int header_line_p) |
4588ec20 | 4412 | { |
5f5c8ee5 GM |
4413 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4414 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4415 | int yb = window_text_bottom_y (w); | |
6df5d75f GM |
4416 | int i, j, first_old, first_new, last_old, last_new; |
4417 | int nruns, nbytes, n, run_idx; | |
4418 | struct row_entry *entry; | |
fa971ac3 | 4419 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4420 | |
4421 | /* Skip over rows equal at the start. */ | |
bfdcafe1 | 4422 | for (i = header_line_p ? 1 : 0; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4423 | { |
bfdcafe1 GM |
4424 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4425 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4426 | ||
4427 | if (c->enabled_p | |
4428 | && d->enabled_p | |
6b61353c | 4429 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4430 | && c->y == d->y |
4431 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4432 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
4433 | && row_equal_p (w, c, d, 1)) | |
4434 | { | |
4435 | assign_row (c, d); | |
4436 | d->enabled_p = 0; | |
4437 | } | |
4438 | else | |
4439 | break; | |
5f5c8ee5 | 4440 | } |
4588ec20 | 4441 | |
5f5c8ee5 GM |
4442 | /* Give up if some rows in the desired matrix are not enabled. */ |
4443 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4444 | return -1; | |
177c0ea7 | 4445 | |
5f5c8ee5 GM |
4446 | first_old = first_new = i; |
4447 | ||
4448 | /* Set last_new to the index + 1 of the last enabled row in the | |
4449 | desired matrix. */ | |
4450 | i = first_new + 1; | |
4451 | while (i < desired_matrix->nrows - 1 | |
4452 | && MATRIX_ROW (desired_matrix, i)->enabled_p | |
6df5d75f | 4453 | && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)) <= yb) |
5f5c8ee5 GM |
4454 | ++i; |
4455 | ||
4456 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4457 | return 0; | |
4458 | ||
4459 | last_new = i; | |
4460 | ||
4461 | /* Set last_old to the index + 1 of the last enabled row in the | |
4462 | current matrix. We don't look at the enabled flag here because | |
4463 | we plan to reuse part of the display even if other parts are | |
4464 | disabled. */ | |
4465 | i = first_old + 1; | |
93962bfa GM |
4466 | while (i < current_matrix->nrows - 1) |
4467 | { | |
4468 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4469 | if (bottom <= yb) | |
4470 | ++i; | |
4471 | if (bottom >= yb) | |
4472 | break; | |
4473 | } | |
4474 | ||
5f5c8ee5 GM |
4475 | last_old = i; |
4476 | ||
4477 | /* Skip over rows equal at the bottom. */ | |
4478 | i = last_new; | |
4479 | j = last_old; | |
4480 | while (i - 1 > first_new | |
4481 | && j - 1 > first_old | |
4482 | && MATRIX_ROW (current_matrix, i - 1)->enabled_p | |
4483 | && (MATRIX_ROW (current_matrix, i - 1)->y | |
4484 | == MATRIX_ROW (desired_matrix, j - 1)->y) | |
6b61353c | 4485 | && !MATRIX_ROW (desired_matrix, j - 1)->redraw_fringe_bitmaps_p |
5f5c8ee5 GM |
4486 | && row_equal_p (w, |
4487 | MATRIX_ROW (desired_matrix, i - 1), | |
e4e0bee9 | 4488 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
4489 | --i, --j; |
4490 | last_new = i; | |
4491 | last_old = j; | |
4492 | ||
4493 | /* Nothing to do if all rows are equal. */ | |
4494 | if (last_new == first_new) | |
4495 | return 0; | |
4496 | ||
6df5d75f | 4497 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 4498 | |
6df5d75f GM |
4499 | if (current_matrix->nrows > old_lines_size) |
4500 | { | |
4501 | old_lines_size = current_matrix->nrows; | |
4502 | nbytes = old_lines_size * sizeof *old_lines; | |
4503 | old_lines = (struct row_entry **) xrealloc (old_lines, nbytes); | |
4504 | } | |
177c0ea7 | 4505 | |
6df5d75f GM |
4506 | if (desired_matrix->nrows > new_lines_size) |
4507 | { | |
4508 | new_lines_size = desired_matrix->nrows; | |
4509 | nbytes = new_lines_size * sizeof *new_lines; | |
4510 | new_lines = (struct row_entry **) xrealloc (new_lines, nbytes); | |
4511 | } | |
4512 | ||
4513 | n = desired_matrix->nrows + current_matrix->nrows; | |
4514 | if (3 * n > row_table_size) | |
4515 | { | |
4516 | row_table_size = next_almost_prime (3 * n); | |
4517 | nbytes = row_table_size * sizeof *row_table; | |
4518 | row_table = (struct row_entry **) xrealloc (row_table, nbytes); | |
72af86bd | 4519 | memset (row_table, 0, nbytes); |
6df5d75f GM |
4520 | } |
4521 | ||
4522 | if (n > row_entry_pool_size) | |
4523 | { | |
4524 | row_entry_pool_size = n; | |
4525 | nbytes = row_entry_pool_size * sizeof *row_entry_pool; | |
4526 | row_entry_pool = (struct row_entry *) xrealloc (row_entry_pool, nbytes); | |
4527 | } | |
4528 | ||
4529 | if (desired_matrix->nrows > runs_size) | |
4530 | { | |
4531 | runs_size = desired_matrix->nrows; | |
4532 | nbytes = runs_size * sizeof *runs; | |
4533 | runs = (struct run **) xrealloc (runs, nbytes); | |
4534 | nbytes = runs_size * sizeof *run_pool; | |
4535 | run_pool = (struct run *) xrealloc (run_pool, nbytes); | |
4536 | } | |
4537 | ||
4538 | nruns = run_idx = 0; | |
4539 | row_entry_idx = 0; | |
4540 | ||
4541 | /* Add rows from the current and desired matrix to the hash table | |
4542 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 4543 | |
5f5c8ee5 GM |
4544 | for (i = first_old; i < last_old; ++i) |
4545 | { | |
4546 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
4547 | { | |
6df5d75f GM |
4548 | entry = add_row_entry (w, MATRIX_ROW (current_matrix, i)); |
4549 | old_lines[i] = entry; | |
4550 | ++entry->old_uses; | |
5f5c8ee5 GM |
4551 | } |
4552 | else | |
6df5d75f | 4553 | old_lines[i] = NULL; |
5f5c8ee5 GM |
4554 | } |
4555 | ||
5f5c8ee5 GM |
4556 | for (i = first_new; i < last_new; ++i) |
4557 | { | |
4558 | xassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); | |
6df5d75f GM |
4559 | entry = add_row_entry (w, MATRIX_ROW (desired_matrix, i)); |
4560 | ++entry->new_uses; | |
4561 | entry->new_line_number = i; | |
4562 | new_lines[i] = entry; | |
5f5c8ee5 | 4563 | } |
4588ec20 | 4564 | |
5f5c8ee5 GM |
4565 | /* Identify moves based on lines that are unique and equal |
4566 | in both matrices. */ | |
4567 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
4568 | if (old_lines[i] |
4569 | && old_lines[i]->old_uses == 1 | |
4570 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 GM |
4571 | { |
4572 | int j, k; | |
6df5d75f GM |
4573 | int new_line = old_lines[i]->new_line_number; |
4574 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
4575 | |
4576 | /* Record move. */ | |
4577 | run->current_vpos = i; | |
4578 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
4579 | run->desired_vpos = new_line; | |
4580 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
4581 | run->nrows = 1; | |
4582 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
4583 | ||
4584 | /* Extend backward. */ | |
4585 | j = i - 1; | |
4586 | k = new_line - 1; | |
4587 | while (j > first_old | |
4588 | && k > first_new | |
6df5d75f | 4589 | && old_lines[j] == new_lines[k]) |
5f5c8ee5 GM |
4590 | { |
4591 | int h = MATRIX_ROW (current_matrix, j)->height; | |
177c0ea7 JB |
4592 | --run->current_vpos; |
4593 | --run->desired_vpos; | |
5f5c8ee5 GM |
4594 | ++run->nrows; |
4595 | run->height += h; | |
4596 | run->desired_y -= h; | |
4597 | run->current_y -= h; | |
4598 | --j, --k; | |
4599 | } | |
4588ec20 | 4600 | |
5f5c8ee5 GM |
4601 | /* Extend forward. */ |
4602 | j = i + 1; | |
4603 | k = new_line + 1; | |
4604 | while (j < last_old | |
4605 | && k < last_new | |
6df5d75f | 4606 | && old_lines[j] == new_lines[k]) |
5f5c8ee5 GM |
4607 | { |
4608 | int h = MATRIX_ROW (current_matrix, j)->height; | |
177c0ea7 | 4609 | ++run->nrows; |
5f5c8ee5 GM |
4610 | run->height += h; |
4611 | ++j, ++k; | |
4612 | } | |
19dff8dc | 4613 | |
5f5c8ee5 GM |
4614 | /* Insert run into list of all runs. Order runs by copied |
4615 | pixel lines. Note that we record runs that don't have to | |
4616 | be copied because they are already in place. This is done | |
4617 | because we can avoid calling update_window_line in this | |
4618 | case. */ | |
4619 | for (j = 0; j < nruns && runs[j]->height > run->height; ++j) | |
4620 | ; | |
2b4ec4d7 | 4621 | for (k = nruns; k > j; --k) |
5f5c8ee5 GM |
4622 | runs[k] = runs[k - 1]; |
4623 | runs[j] = run; | |
4624 | ++nruns; | |
4625 | ||
4626 | i += run->nrows; | |
4627 | } | |
4628 | else | |
4629 | ++i; | |
4588ec20 | 4630 | |
5f5c8ee5 GM |
4631 | /* Do the moves. Do it in a way that we don't overwrite something |
4632 | we want to copy later on. This is not solvable in general | |
4633 | because there is only one display and we don't have a way to | |
4634 | exchange areas on this display. Example: | |
4588ec20 | 4635 | |
5f5c8ee5 GM |
4636 | +-----------+ +-----------+ |
4637 | | A | | B | | |
4638 | +-----------+ --> +-----------+ | |
4639 | | B | | A | | |
4640 | +-----------+ +-----------+ | |
4588ec20 | 4641 | |
5f5c8ee5 GM |
4642 | Instead, prefer bigger moves, and invalidate moves that would |
4643 | copy from where we copied to. */ | |
ea0d86af | 4644 | |
5f5c8ee5 GM |
4645 | for (i = 0; i < nruns; ++i) |
4646 | if (runs[i]->nrows > 0) | |
4647 | { | |
4648 | struct run *r = runs[i]; | |
24e86043 | 4649 | |
5f5c8ee5 GM |
4650 | /* Copy on the display. */ |
4651 | if (r->current_y != r->desired_y) | |
4652 | { | |
4653 | rif->scroll_run_hook (w, r); | |
4654 | ||
4655 | /* Invalidate runs that copy from where we copied to. */ | |
4656 | for (j = i + 1; j < nruns; ++j) | |
4657 | { | |
4658 | struct run *p = runs[j]; | |
177c0ea7 | 4659 | |
5f5c8ee5 GM |
4660 | if ((p->current_y >= r->desired_y |
4661 | && p->current_y < r->desired_y + r->height) | |
4662 | || (p->current_y + p->height >= r->desired_y | |
4663 | && (p->current_y + p->height | |
4664 | < r->desired_y + r->height))) | |
4665 | p->nrows = 0; | |
4666 | } | |
4667 | } | |
ea0d86af | 4668 | |
5f5c8ee5 GM |
4669 | /* Assign matrix rows. */ |
4670 | for (j = 0; j < r->nrows; ++j) | |
4671 | { | |
4672 | struct glyph_row *from, *to; | |
408f5064 | 4673 | int to_overlapped_p; |
e876ff42 | 4674 | |
5f5c8ee5 GM |
4675 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
4676 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 4677 | to_overlapped_p = to->overlapped_p; |
6b61353c KH |
4678 | if (!from->mode_line_p && !w->pseudo_window_p |
4679 | && (to->left_fringe_bitmap != from->left_fringe_bitmap | |
4680 | || to->right_fringe_bitmap != from->right_fringe_bitmap | |
4681 | || to->left_fringe_face_id != from->left_fringe_face_id | |
4682 | || to->right_fringe_face_id != from->right_fringe_face_id | |
3d4a365f | 4683 | || to->overlay_arrow_bitmap != from->overlay_arrow_bitmap)) |
6b61353c | 4684 | from->redraw_fringe_bitmaps_p = 1; |
5f5c8ee5 GM |
4685 | assign_row (to, from); |
4686 | to->enabled_p = 1, from->enabled_p = 0; | |
408f5064 | 4687 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
4688 | } |
4689 | } | |
15874c59 | 4690 | |
6df5d75f GM |
4691 | /* Clear the hash table, for the next time. */ |
4692 | for (i = 0; i < row_entry_idx; ++i) | |
4693 | row_table[row_entry_pool[i].bucket] = NULL; | |
4694 | ||
6b61353c KH |
4695 | /* Value is > 0 to indicate that we scrolled the display. */ |
4696 | return nruns; | |
5f5c8ee5 | 4697 | } |
de83c314 | 4698 | |
15874c59 | 4699 | |
4588ec20 | 4700 | \f |
5f5c8ee5 GM |
4701 | /************************************************************************ |
4702 | Frame-Based Updates | |
4703 | ************************************************************************/ | |
4588ec20 | 4704 | |
5f5c8ee5 | 4705 | /* Update the desired frame matrix of frame F. |
4588ec20 | 4706 | |
5f5c8ee5 GM |
4707 | FORCE_P non-zero means that the update should not be stopped by |
4708 | pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling | |
4709 | should not be tried. | |
4710 | ||
4711 | Value is non-zero if update was stopped due to pending input. */ | |
4712 | ||
4713 | static int | |
971de7fb | 4714 | update_frame_1 (struct frame *f, int force_p, int inhibit_id_p) |
4588ec20 | 4715 | { |
5f5c8ee5 GM |
4716 | /* Frame matrices to work on. */ |
4717 | struct glyph_matrix *current_matrix = f->current_matrix; | |
4718 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
4719 | int i; | |
4588ec20 JB |
4720 | int pause; |
4721 | int preempt_count = baud_rate / 2400 + 1; | |
dfcf069d | 4722 | extern int input_pending; |
5f5c8ee5 GM |
4723 | |
4724 | xassert (current_matrix && desired_matrix); | |
4588ec20 | 4725 | |
c37e4889 RS |
4726 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
4727 | calculate_costs (f); | |
4728 | ||
d88c2b9e RS |
4729 | if (preempt_count <= 0) |
4730 | preempt_count = 1; | |
4731 | ||
a2130dbb KS |
4732 | #if !PERIODIC_PREEMPTION_CHECKING |
4733 | if (!force_p && detect_input_pending_ignore_squeezables ()) | |
4588ec20 JB |
4734 | { |
4735 | pause = 1; | |
4736 | goto do_pause; | |
4737 | } | |
d012c62b | 4738 | #endif |
4588ec20 | 4739 | |
5f5c8ee5 | 4740 | /* If we cannot insert/delete lines, it's no use trying it. */ |
daf01701 | 4741 | if (!FRAME_LINE_INS_DEL_OK (f)) |
5f5c8ee5 | 4742 | inhibit_id_p = 1; |
7098a0fa | 4743 | |
efb859b4 | 4744 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
4745 | i/d line if just want cursor motion. */ |
4746 | for (i = 0; i < desired_matrix->nrows; i++) | |
4747 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
4748 | break; |
4749 | ||
4750 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
4751 | if (!inhibit_id_p && i < desired_matrix->nrows) |
4752 | force_p |= scrolling (f); | |
4588ec20 JB |
4753 | |
4754 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
4755 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
4756 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 4757 | |
5f5c8ee5 GM |
4758 | /* Now update the rest of the lines. */ |
4759 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 4760 | { |
5f5c8ee5 | 4761 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 4762 | { |
b6a65ac2 | 4763 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
4764 | { |
4765 | /* Flush out every so many lines. | |
4766 | Also flush out if likely to have more than 1k buffered | |
4767 | otherwise. I'm told that some telnet connections get | |
4768 | really screwed by more than 1k output at once. */ | |
fced92f1 CY |
4769 | FILE *display_output = FRAME_TTY (f)->output; |
4770 | if (display_output) | |
4588ec20 | 4771 | { |
fced92f1 CY |
4772 | int outq = PENDING_OUTPUT_COUNT (display_output); |
4773 | if (outq > 900 | |
4774 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
4588ec20 | 4775 | { |
fced92f1 CY |
4776 | fflush (display_output); |
4777 | if (preempt_count == 1) | |
4778 | { | |
a41f8bed | 4779 | #ifdef EMACS_OUTQSIZE |
fced92f1 CY |
4780 | if (EMACS_OUTQSIZE (0, &outq) < 0) |
4781 | /* Probably not a tty. Ignore the error and reset | |
4782 | the outq count. */ | |
4783 | outq = PENDING_OUTPUT_COUNT (FRAME_TTY (f->output)); | |
4588ec20 | 4784 | #endif |
fced92f1 CY |
4785 | outq *= 10; |
4786 | if (baud_rate <= outq && baud_rate > 0) | |
4787 | sleep (outq / baud_rate); | |
4788 | } | |
4588ec20 JB |
4789 | } |
4790 | } | |
4588ec20 JB |
4791 | } |
4792 | ||
d012c62b KS |
4793 | #if PERIODIC_PREEMPTION_CHECKING |
4794 | if (!force_p) | |
4795 | { | |
4796 | EMACS_TIME tm, dif; | |
4797 | EMACS_GET_TIME (tm); | |
4798 | EMACS_SUB_TIME (dif, preemption_next_check, tm); | |
4799 | if (EMACS_TIME_NEG_P (dif)) | |
4800 | { | |
4801 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
4802 | if (detect_input_pending_ignore_squeezables ()) |
4803 | break; | |
d012c62b KS |
4804 | } |
4805 | } | |
4806 | #else | |
4807 | if (!force_p && (i - 1) % preempt_count == 0) | |
a2d5fca0 | 4808 | detect_input_pending_ignore_squeezables (); |
d012c62b | 4809 | #endif |
a2960116 | 4810 | |
5f5c8ee5 | 4811 | update_frame_line (f, i); |
4588ec20 | 4812 | } |
4588ec20 | 4813 | } |
177c0ea7 | 4814 | |
7df02016 | 4815 | pause = (i < FRAME_LINES (f) - 1) ? i : 0; |
4588ec20 JB |
4816 | |
4817 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
4818 | if (!pause) | |
4819 | { | |
48cf7030 | 4820 | if ((cursor_in_echo_area |
5f5c8ee5 | 4821 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 4822 | show the cursor for the message instead of for the |
5f5c8ee5 | 4823 | (now hidden) mini-buffer contents. */ |
2577053b RS |
4824 | || (EQ (minibuf_window, selected_window) |
4825 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 4826 | && !NILP (echo_area_buffer[0]))) |
2577053b | 4827 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 4828 | the active mini-buffer window. */ |
2577053b | 4829 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 4830 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 4831 | { |
7df02016 | 4832 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
4833 | int row, col; |
4834 | ||
4835 | if (cursor_in_echo_area < 0) | |
4836 | { | |
5f5c8ee5 GM |
4837 | /* Negative value of cursor_in_echo_area means put |
4838 | cursor at beginning of line. */ | |
648fa17d JB |
4839 | row = top; |
4840 | col = 0; | |
4841 | } | |
1113d9db | 4842 | else |
648fa17d | 4843 | { |
5f5c8ee5 GM |
4844 | /* Positive value of cursor_in_echo_area means put |
4845 | cursor at the end of the prompt. If the mini-buffer | |
4846 | is several lines high, find the last line that has | |
4847 | any text on it. */ | |
7df02016 | 4848 | row = FRAME_LINES (f); |
177c0ea7 | 4849 | do |
648fa17d | 4850 | { |
5f5c8ee5 GM |
4851 | --row; |
4852 | col = 0; | |
177c0ea7 | 4853 | |
5f5c8ee5 GM |
4854 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
4855 | { | |
4856 | /* Frame rows are filled up with spaces that | |
4857 | must be ignored here. */ | |
5f5c8ee5 GM |
4858 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
4859 | row); | |
4860 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
4861 | struct glyph *last = start + r->used[TEXT_AREA]; | |
4862 | ||
4863 | while (last > start | |
4864 | && (last - 1)->charpos < 0) | |
4865 | --last; | |
177c0ea7 | 4866 | |
5f5c8ee5 GM |
4867 | col = last - start; |
4868 | } | |
648fa17d JB |
4869 | } |
4870 | while (row > top && col == 0); | |
4871 | ||
6395da5c | 4872 | /* Make sure COL is not out of range. */ |
868e640e | 4873 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 4874 | { |
6395da5c | 4875 | /* If we have another row, advance cursor into it. */ |
7df02016 | 4876 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 4877 | { |
7df02016 | 4878 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
4879 | row++; |
4880 | } | |
4881 | /* Otherwise move it back in range. */ | |
4882 | else | |
868e640e | 4883 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
4884 | } |
4885 | } | |
4886 | ||
385ed61f | 4887 | cursor_to (f, row, col); |
1113d9db | 4888 | } |
4588ec20 | 4889 | else |
5f5c8ee5 GM |
4890 | { |
4891 | /* We have only one cursor on terminal frames. Use it to | |
4892 | display the cursor of the selected window. */ | |
4893 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
4894 | if (w->cursor.vpos >= 0 |
4895 | /* The cursor vpos may be temporarily out of bounds | |
4896 | in the following situation: There is one window, | |
4897 | with the cursor in the lower half of it. The window | |
4898 | is split, and a message causes a redisplay before | |
4899 | a new cursor position has been computed. */ | |
7df02016 | 4900 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
4901 | { |
4902 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
4903 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
4904 | ||
7df02016 KS |
4905 | if (INTEGERP (w->left_margin_cols)) |
4906 | x += XFASTINT (w->left_margin_cols); | |
177c0ea7 | 4907 | |
7df02016 | 4908 | /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */ |
385ed61f | 4909 | cursor_to (f, y, x); |
5f5c8ee5 GM |
4910 | } |
4911 | } | |
4588ec20 JB |
4912 | } |
4913 | ||
4588ec20 JB |
4914 | do_pause: |
4915 | ||
5f5c8ee5 | 4916 | clear_desired_matrices (f); |
4588ec20 JB |
4917 | return pause; |
4918 | } | |
4919 | ||
4588ec20 | 4920 | |
5f5c8ee5 | 4921 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 4922 | |
dfcf069d | 4923 | int |
971de7fb | 4924 | scrolling (struct frame *frame) |
4588ec20 JB |
4925 | { |
4926 | int unchanged_at_top, unchanged_at_bottom; | |
4927 | int window_size; | |
4928 | int changed_lines; | |
7df02016 KS |
4929 | int *old_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); |
4930 | int *new_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4931 | int *draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4932 | int *old_draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 4933 | register int i; |
7df02016 | 4934 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
4935 | struct glyph_matrix *current_matrix = frame->current_matrix; |
4936 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 4937 | |
5f5c8ee5 GM |
4938 | if (!current_matrix) |
4939 | abort (); | |
4588ec20 | 4940 | |
5f5c8ee5 GM |
4941 | /* Compute hash codes of all the lines. Also calculate number of |
4942 | changed lines, number of unchanged lines at the beginning, and | |
4943 | number of unchanged lines at the end. */ | |
4588ec20 JB |
4944 | changed_lines = 0; |
4945 | unchanged_at_top = 0; | |
7df02016 KS |
4946 | unchanged_at_bottom = FRAME_LINES (frame); |
4947 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
4948 | { |
4949 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 4950 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 4951 | return 0; |
5f5c8ee5 GM |
4952 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
4953 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
4954 | { |
4955 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
4956 | new_hash[i] = old_hash[i]; | |
4957 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
4958 | draw_cost[i] = INFINITY; | |
4959 | } | |
4588ec20 | 4960 | else |
f188b3c4 | 4961 | { |
5f5c8ee5 GM |
4962 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
4963 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 4964 | } |
4588ec20 JB |
4965 | |
4966 | if (old_hash[i] != new_hash[i]) | |
4967 | { | |
4968 | changed_lines++; | |
7df02016 | 4969 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
4970 | } |
4971 | else if (i == unchanged_at_top) | |
4972 | unchanged_at_top++; | |
5f5c8ee5 | 4973 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
4974 | } |
4975 | ||
4976 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
daf01701 | 4977 | if ((!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4978 | && changed_lines < baud_rate / 2400) |
7df02016 | 4979 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
4980 | return 1; |
4981 | ||
7df02016 | 4982 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
4983 | - unchanged_at_bottom); |
4984 | ||
daf01701 | 4985 | if (FRAME_SCROLL_REGION_OK (frame)) |
4588ec20 | 4986 | free_at_end_vpos -= unchanged_at_bottom; |
daf01701 | 4987 | else if (FRAME_MEMORY_BELOW_FRAME (frame)) |
4588ec20 JB |
4988 | free_at_end_vpos = -1; |
4989 | ||
4990 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 4991 | current frame and desired frame, don't bother with i/d calc. */ |
daf01701 | 4992 | if (!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4993 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
4994 | && (window_size >= |
4995 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 4996 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
4997 | old_hash, new_hash, draw_cost))) |
4998 | return 0; | |
4999 | ||
5f5c8ee5 GM |
5000 | if (window_size < 2) |
5001 | return 0; | |
5002 | ||
502b9b64 | 5003 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 5004 | draw_cost + unchanged_at_top - 1, |
190bb91a | 5005 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
5006 | old_hash + unchanged_at_top - 1, |
5007 | new_hash + unchanged_at_top - 1, | |
5008 | free_at_end_vpos - unchanged_at_top); | |
5009 | ||
5010 | return 0; | |
5011 | } | |
4588ec20 | 5012 | |
4588ec20 | 5013 | |
5f5c8ee5 GM |
5014 | /* Count the number of blanks at the start of the vector of glyphs R |
5015 | which is LEN glyphs long. */ | |
4588ec20 | 5016 | |
4588ec20 | 5017 | static int |
971de7fb | 5018 | count_blanks (struct glyph *r, int len) |
4588ec20 | 5019 | { |
5f5c8ee5 | 5020 | int i; |
177c0ea7 | 5021 | |
5f5c8ee5 GM |
5022 | for (i = 0; i < len; ++i) |
5023 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
5024 | break; | |
5025 | ||
5026 | return i; | |
4588ec20 JB |
5027 | } |
5028 | ||
5f5c8ee5 GM |
5029 | |
5030 | /* Count the number of glyphs in common at the start of the glyph | |
5031 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
5032 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
5033 | ||
4588ec20 | 5034 | static int |
971de7fb | 5035 | count_match (struct glyph *str1, struct glyph *end1, struct glyph *str2, struct glyph *end2) |
4588ec20 | 5036 | { |
5f5c8ee5 GM |
5037 | struct glyph *p1 = str1; |
5038 | struct glyph *p2 = str2; | |
177c0ea7 | 5039 | |
5f5c8ee5 GM |
5040 | while (p1 < end1 |
5041 | && p2 < end2 | |
42186983 | 5042 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 5043 | ++p1, ++p2; |
177c0ea7 | 5044 | |
5f5c8ee5 | 5045 | return p1 - str1; |
4588ec20 JB |
5046 | } |
5047 | ||
5f5c8ee5 | 5048 | |
4588ec20 | 5049 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 5050 | |
5f5c8ee5 | 5051 | extern int *char_ins_del_vector; |
7df02016 | 5052 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))]) |
4588ec20 | 5053 | |
5f5c8ee5 GM |
5054 | |
5055 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
5056 | ||
4588ec20 | 5057 | static void |
971de7fb | 5058 | update_frame_line (struct frame *f, int vpos) |
4588ec20 | 5059 | { |
5f5c8ee5 | 5060 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
5061 | int tem; |
5062 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
5063 | struct glyph_matrix *current_matrix = f->current_matrix; |
5064 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
5065 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
5066 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
5067 | int must_write_whole_line_p; | |
daf01701 | 5068 | int write_spaces_p = FRAME_MUST_WRITE_SPACES (f); |
c363a1d6 | 5069 | int colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background |
0a894bad GM |
5070 | != FACE_TTY_DEFAULT_BG_COLOR); |
5071 | ||
5072 | if (colored_spaces_p) | |
5073 | write_spaces_p = 1; | |
5f5c8ee5 | 5074 | |
26c63686 GM |
5075 | /* Current row not enabled means it has unknown contents. We must |
5076 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
5077 | must_write_whole_line_p = !current_row->enabled_p; |
5078 | if (must_write_whole_line_p) | |
4588ec20 | 5079 | { |
5f5c8ee5 | 5080 | obody = 0; |
4588ec20 JB |
5081 | olen = 0; |
5082 | } | |
5083 | else | |
5084 | { | |
5f5c8ee5 GM |
5085 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
5086 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 5087 | |
4cecaab8 MB |
5088 | /* Ignore trailing spaces, if we can. */ |
5089 | if (!write_spaces_p) | |
5090 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
5091 | olen--; | |
4588ec20 JB |
5092 | } |
5093 | ||
5f5c8ee5 GM |
5094 | current_row->enabled_p = 1; |
5095 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 5096 | |
5f5c8ee5 GM |
5097 | /* If desired line is empty, just clear the line. */ |
5098 | if (!desired_row->enabled_p) | |
4588ec20 JB |
5099 | { |
5100 | nlen = 0; | |
5101 | goto just_erase; | |
5102 | } | |
5103 | ||
5f5c8ee5 GM |
5104 | nbody = desired_row->glyphs[TEXT_AREA]; |
5105 | nlen = desired_row->used[TEXT_AREA]; | |
5106 | nend = nbody + nlen; | |
5107 | ||
5108 | /* If display line has unknown contents, write the whole line. */ | |
5109 | if (must_write_whole_line_p) | |
5110 | { | |
26c63686 | 5111 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 5112 | if (!write_spaces_p) |
74ca462f GM |
5113 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
5114 | --nlen; | |
5115 | ||
26c63686 | 5116 | /* Write the contents of the desired line. */ |
74ca462f | 5117 | if (nlen) |
26c63686 | 5118 | { |
385ed61f KL |
5119 | cursor_to (f, vpos, 0); |
5120 | write_glyphs (f, nbody, nlen); | |
26c63686 | 5121 | } |
177c0ea7 | 5122 | |
26c63686 GM |
5123 | /* Don't call clear_end_of_line if we already wrote the whole |
5124 | line. The cursor will not be at the right margin in that | |
5125 | case but in the line below. */ | |
7df02016 | 5126 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 | 5127 | { |
385ed61f KL |
5128 | cursor_to (f, vpos, nlen); |
5129 | clear_end_of_line (f, FRAME_TOTAL_COLS (f)); | |
26c63686 | 5130 | } |
58827478 GM |
5131 | else |
5132 | /* Make sure we are in the right row, otherwise cursor movement | |
5133 | with cmgoto might use `ch' in the wrong row. */ | |
385ed61f | 5134 | cursor_to (f, vpos, 0); |
177c0ea7 | 5135 | |
5f5c8ee5 GM |
5136 | make_current (desired_matrix, current_matrix, vpos); |
5137 | return; | |
5138 | } | |
4588ec20 JB |
5139 | |
5140 | /* Pretend trailing spaces are not there at all, | |
5141 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
5142 | if (!write_spaces_p) |
5143 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
5144 | nlen--; | |
4588ec20 JB |
5145 | |
5146 | /* If there's no i/d char, quickly do the best we can without it. */ | |
daf01701 | 5147 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
4588ec20 | 5148 | { |
5f5c8ee5 | 5149 | int i, j; |
4588ec20 | 5150 | |
5f5c8ee5 GM |
5151 | /* Find the first glyph in desired row that doesn't agree with |
5152 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
5153 | for (i = 0; i < nlen; i++) |
5154 | { | |
5f5c8ee5 | 5155 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 5156 | { |
5f5c8ee5 GM |
5157 | /* Find the end of the run of different glyphs. */ |
5158 | j = i + 1; | |
5159 | while (j < nlen | |
5160 | && (j >= olen | |
5161 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
5162 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
5163 | ++j; | |
177c0ea7 JB |
5164 | |
5165 | /* Output this run of non-matching chars. */ | |
385ed61f KL |
5166 | cursor_to (f, vpos, i); |
5167 | write_glyphs (f, nbody + i, j - i); | |
5f5c8ee5 | 5168 | i = j - 1; |
4588ec20 JB |
5169 | |
5170 | /* Now find the next non-match. */ | |
5171 | } | |
5172 | } | |
5173 | ||
5174 | /* Clear the rest of the line, or the non-clear part of it. */ | |
5175 | if (olen > nlen) | |
5176 | { | |
385ed61f KL |
5177 | cursor_to (f, vpos, nlen); |
5178 | clear_end_of_line (f, olen); | |
4588ec20 JB |
5179 | } |
5180 | ||
5f5c8ee5 GM |
5181 | /* Make current row = desired row. */ |
5182 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
5183 | return; |
5184 | } | |
5185 | ||
5f5c8ee5 GM |
5186 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
5187 | characters in a row. */ | |
5188 | ||
4588ec20 JB |
5189 | if (!olen) |
5190 | { | |
5f5c8ee5 GM |
5191 | /* If current line is blank, skip over initial spaces, if |
5192 | possible, and write the rest. */ | |
4cecaab8 | 5193 | if (write_spaces_p) |
5f5c8ee5 GM |
5194 | nsp = 0; |
5195 | else | |
5196 | nsp = count_blanks (nbody, nlen); | |
5197 | ||
4588ec20 JB |
5198 | if (nlen > nsp) |
5199 | { | |
385ed61f KL |
5200 | cursor_to (f, vpos, nsp); |
5201 | write_glyphs (f, nbody + nsp, nlen - nsp); | |
4588ec20 JB |
5202 | } |
5203 | ||
502b9b64 | 5204 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 5205 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
5206 | return; |
5207 | } | |
5208 | ||
4588ec20 | 5209 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 5210 | osp = count_blanks (obody, olen); |
4cecaab8 | 5211 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 5212 | |
5f5c8ee5 GM |
5213 | /* Compute number of matching chars starting with first non-blank. */ |
5214 | begmatch = count_match (obody + osp, obody + olen, | |
5215 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
5216 | |
5217 | /* Spaces in new match implicit space past the end of old. */ | |
5218 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 5219 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
5220 | { |
5221 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
5222 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
5223 | ++begmatch; | |
4588ec20 JB |
5224 | } |
5225 | ||
5226 | /* Avoid doing insert/delete char | |
5227 | just cause number of leading spaces differs | |
5f5c8ee5 | 5228 | when the following text does not match. */ |
4588ec20 JB |
5229 | if (begmatch == 0 && osp != nsp) |
5230 | osp = nsp = min (osp, nsp); | |
5231 | ||
5232 | /* Find matching characters at end of line */ | |
5233 | op1 = obody + olen; | |
5234 | np1 = nbody + nlen; | |
5235 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
5236 | while (op1 > op2 |
5237 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
5238 | { |
5239 | op1--; | |
5240 | np1--; | |
5241 | } | |
5242 | endmatch = obody + olen - op1; | |
5243 | ||
4588ec20 JB |
5244 | /* tem gets the distance to insert or delete. |
5245 | endmatch is how many characters we save by doing so. | |
5246 | Is it worth it? */ | |
5247 | ||
5248 | tem = (nlen - nsp) - (olen - osp); | |
5249 | if (endmatch && tem | |
daf01701 | 5250 | && (!FRAME_CHAR_INS_DEL_OK (f) |
8a56675d | 5251 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
5252 | endmatch = 0; |
5253 | ||
5254 | /* nsp - osp is the distance to insert or delete. | |
5255 | If that is nonzero, begmatch is known to be nonzero also. | |
5256 | begmatch + endmatch is how much we save by doing the ins/del. | |
5257 | Is it worth it? */ | |
5258 | ||
5259 | if (nsp != osp | |
daf01701 | 5260 | && (!FRAME_CHAR_INS_DEL_OK (f) |
c363a1d6 | 5261 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
5262 | { |
5263 | begmatch = 0; | |
5264 | endmatch = 0; | |
5265 | osp = nsp = min (osp, nsp); | |
5266 | } | |
5267 | ||
5268 | /* Now go through the line, inserting, writing and | |
5269 | deleting as appropriate. */ | |
5270 | ||
5271 | if (osp > nsp) | |
5272 | { | |
385ed61f KL |
5273 | cursor_to (f, vpos, nsp); |
5274 | delete_glyphs (f, osp - nsp); | |
4588ec20 JB |
5275 | } |
5276 | else if (nsp > osp) | |
5277 | { | |
5278 | /* If going to delete chars later in line | |
5279 | and insert earlier in the line, | |
5280 | must delete first to avoid losing data in the insert */ | |
5281 | if (endmatch && nlen < olen + nsp - osp) | |
5282 | { | |
385ed61f KL |
5283 | cursor_to (f, vpos, nlen - endmatch + osp - nsp); |
5284 | delete_glyphs (f, olen + nsp - osp - nlen); | |
4588ec20 JB |
5285 | olen = nlen - (nsp - osp); |
5286 | } | |
385ed61f KL |
5287 | cursor_to (f, vpos, osp); |
5288 | insert_glyphs (f, 0, nsp - osp); | |
4588ec20 JB |
5289 | } |
5290 | olen += nsp - osp; | |
5291 | ||
5292 | tem = nsp + begmatch + endmatch; | |
5293 | if (nlen != tem || olen != tem) | |
5294 | { | |
4588ec20 JB |
5295 | if (!endmatch || nlen == olen) |
5296 | { | |
c363a1d6 GM |
5297 | /* If new text being written reaches right margin, there is |
5298 | no need to do clear-to-eol at the end of this function | |
5299 | (and it would not be safe, since cursor is not going to | |
5300 | be "at the margin" after the text is done). */ | |
7df02016 | 5301 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 5302 | olen = 0; |
c363a1d6 GM |
5303 | |
5304 | /* Function write_glyphs is prepared to do nothing | |
5305 | if passed a length <= 0. Check it here to avoid | |
5306 | unnecessary cursor movement. */ | |
5307 | if (nlen - tem > 0) | |
5308 | { | |
385ed61f KL |
5309 | cursor_to (f, vpos, nsp + begmatch); |
5310 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
c363a1d6 | 5311 | } |
4588ec20 JB |
5312 | } |
5313 | else if (nlen > olen) | |
5314 | { | |
24e86043 KH |
5315 | /* Here, we used to have the following simple code: |
5316 | ---------------------------------------- | |
5317 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
5318 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
5319 | ---------------------------------------- | |
5320 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
5321 | is a padding glyph. */ | |
5322 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
5323 | int del; | |
5f5c8ee5 | 5324 | |
385ed61f | 5325 | cursor_to (f, vpos, nsp + begmatch); |
177c0ea7 | 5326 | |
5f5c8ee5 | 5327 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
5328 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
5329 | out--; | |
385ed61f | 5330 | write_glyphs (f, nbody + nsp + begmatch, out); |
177c0ea7 | 5331 | |
5f5c8ee5 GM |
5332 | /* If we left columns to be overwritten, we must delete them. */ |
5333 | del = olen - tem - out; | |
c363a1d6 | 5334 | if (del > 0) |
385ed61f | 5335 | delete_glyphs (f, del); |
177c0ea7 | 5336 | |
5f5c8ee5 | 5337 | /* At last, we insert columns not yet written out. */ |
385ed61f | 5338 | insert_glyphs (f, nbody + nsp + begmatch + out, nlen - olen + del); |
5f5c8ee5 GM |
5339 | olen = nlen; |
5340 | } | |
5341 | else if (olen > nlen) | |
5342 | { | |
385ed61f KL |
5343 | cursor_to (f, vpos, nsp + begmatch); |
5344 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
5345 | delete_glyphs (f, olen - nlen); | |
5f5c8ee5 GM |
5346 | olen = nlen; |
5347 | } | |
bd9e3e75 | 5348 | } |
5f5c8ee5 GM |
5349 | |
5350 | just_erase: | |
5351 | /* If any unerased characters remain after the new line, erase them. */ | |
5352 | if (olen > nlen) | |
078b3696 | 5353 | { |
385ed61f KL |
5354 | cursor_to (f, vpos, nlen); |
5355 | clear_end_of_line (f, olen); | |
078b3696 | 5356 | } |
5f5c8ee5 GM |
5357 | |
5358 | /* Exchange contents between current_frame and new_frame. */ | |
5359 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5360 | } |
5f5c8ee5 GM |
5361 | |
5362 | ||
078b3696 | 5363 | \f |
5f5c8ee5 GM |
5364 | /*********************************************************************** |
5365 | X/Y Position -> Buffer Position | |
5366 | ***********************************************************************/ | |
5367 | ||
a1b0a6db | 5368 | /* Determine what's under window-relative pixel position (*X, *Y). |
6b61353c KH |
5369 | Return the object (string or buffer) that's there. |
5370 | Return in *POS the position in that object. | |
5371 | Adjust *X and *Y to character positions. */ | |
5f5c8ee5 | 5372 | |
6b61353c | 5373 | Lisp_Object |
971de7fb | 5374 | 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 | 5375 | { |
5f5c8ee5 | 5376 | struct it it; |
707ea971 | 5377 | Lisp_Object old_current_buffer = Fcurrent_buffer (); |
5f5c8ee5 | 5378 | struct text_pos startp; |
6b61353c KH |
5379 | Lisp_Object string; |
5380 | struct glyph_row *row; | |
cedd7cd9 KS |
5381 | #ifdef HAVE_WINDOW_SYSTEM |
5382 | struct image *img = 0; | |
5383 | #endif | |
6b61353c | 5384 | int x0, x1; |
5f5c8ee5 | 5385 | |
707ea971 CY |
5386 | /* We used to set current_buffer directly here, but that does the |
5387 | wrong thing with `face-remapping-alist' (bug#2044). */ | |
5388 | Fset_buffer (w->buffer); | |
5f5c8ee5 GM |
5389 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
5390 | CHARPOS (startp) = min (ZV, max (BEGV, CHARPOS (startp))); | |
5391 | BYTEPOS (startp) = min (ZV_BYTE, max (BEGV_BYTE, BYTEPOS (startp))); | |
5392 | start_display (&it, w, startp); | |
177c0ea7 | 5393 | |
6b61353c KH |
5394 | x0 = *x - WINDOW_LEFT_MARGIN_WIDTH (w); |
5395 | move_it_to (&it, -1, x0 + it.first_visible_x, *y, -1, | |
5f5c8ee5 | 5396 | MOVE_TO_X | MOVE_TO_Y); |
177c0ea7 | 5397 | |
707ea971 | 5398 | Fset_buffer (old_current_buffer); |
a1b0a6db | 5399 | |
6b61353c KH |
5400 | *dx = x0 + it.first_visible_x - it.current_x; |
5401 | *dy = *y - it.current_y; | |
5402 | ||
5403 | string = w->buffer; | |
5404 | if (STRINGP (it.string)) | |
5405 | string = it.string; | |
a1b0a6db | 5406 | *pos = it.current; |
6b61353c KH |
5407 | |
5408 | #ifdef HAVE_WINDOW_SYSTEM | |
5409 | if (it.what == IT_IMAGE) | |
5410 | { | |
6b61353c KH |
5411 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5412 | && !NILP (img->spec)) | |
5413 | *object = img->spec; | |
5414 | } | |
5415 | #endif | |
5416 | ||
b70d98e1 KS |
5417 | if (it.vpos < w->current_matrix->nrows |
5418 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5419 | row->enabled_p)) | |
6b61353c KH |
5420 | { |
5421 | if (it.hpos < row->used[TEXT_AREA]) | |
5422 | { | |
5423 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6b61353c | 5424 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5425 | if (img) |
5426 | { | |
5427 | *dy -= row->ascent - glyph->ascent; | |
5428 | *dx += glyph->slice.x; | |
5429 | *dy += glyph->slice.y; | |
5430 | /* Image slices positions are still relative to the entire image */ | |
5431 | *width = img->width; | |
5432 | *height = img->height; | |
5433 | } | |
5434 | else | |
6b61353c | 5435 | #endif |
cedd7cd9 KS |
5436 | { |
5437 | *width = glyph->pixel_width; | |
5438 | *height = glyph->ascent + glyph->descent; | |
5439 | } | |
6b61353c KH |
5440 | } |
5441 | else | |
5442 | { | |
5443 | *width = 0; | |
5444 | *height = row->height; | |
5445 | } | |
5446 | } | |
5447 | else | |
5448 | { | |
5449 | *width = *height = 0; | |
5450 | } | |
5451 | ||
5452 | /* Add extra (default width) columns if clicked after EOL. */ | |
5453 | x1 = max(0, it.current_x + it.pixel_width - it.first_visible_x); | |
5454 | if (x0 > x1) | |
5455 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5456 | ||
5457 | *x = it.hpos; | |
5458 | *y = it.vpos; | |
5459 | ||
5460 | return string; | |
5f5c8ee5 | 5461 | } |
4588ec20 | 5462 | |
5f5c8ee5 GM |
5463 | |
5464 | /* Value is the string under window-relative coordinates X/Y in the | |
6b61353c KH |
5465 | mode line or header line (PART says which) of window W, or nil if none. |
5466 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
5467 | |
5468 | Lisp_Object | |
971de7fb | 5469 | mode_line_string (struct window *w, enum window_part part, int *x, int *y, int *charpos, Lisp_Object *object, int *dx, int *dy, int *width, int *height) |
5f5c8ee5 GM |
5470 | { |
5471 | struct glyph_row *row; | |
5472 | struct glyph *glyph, *end; | |
6b61353c | 5473 | int x0, y0; |
5f5c8ee5 GM |
5474 | Lisp_Object string = Qnil; |
5475 | ||
641bdbf3 | 5476 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
5477 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
5478 | else | |
045dee35 | 5479 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
6b61353c KH |
5480 | y0 = *y - row->y; |
5481 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
5f5c8ee5 GM |
5482 | |
5483 | if (row->mode_line_p && row->enabled_p) | |
4588ec20 | 5484 | { |
5f5c8ee5 GM |
5485 | /* Find the glyph under X. If we find one with a string object, |
5486 | it's the one we were looking for. */ | |
5487 | glyph = row->glyphs[TEXT_AREA]; | |
5488 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 5489 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5490 | x0 -= glyph->pixel_width; |
5491 | *x = glyph - row->glyphs[TEXT_AREA]; | |
5492 | if (glyph < end) | |
5493 | { | |
5494 | string = glyph->object; | |
5495 | *charpos = glyph->charpos; | |
5496 | *width = glyph->pixel_width; | |
5497 | *height = glyph->ascent + glyph->descent; | |
5498 | #ifdef HAVE_WINDOW_SYSTEM | |
5499 | if (glyph->type == IMAGE_GLYPH) | |
5500 | { | |
5501 | struct image *img; | |
5502 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5503 | if (img != NULL) | |
5504 | *object = img->spec; | |
5505 | y0 -= row->ascent - glyph->ascent; | |
5506 | } | |
5507 | #endif | |
5508 | } | |
5509 | else | |
5510 | { | |
5511 | /* Add extra (default width) columns if clicked after EOL. */ | |
5512 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5513 | *width = 0; | |
5514 | *height = row->height; | |
5515 | } | |
5516 | } | |
5517 | else | |
5518 | { | |
5519 | *x = 0; | |
5520 | x0 = 0; | |
5521 | *width = *height = 0; | |
4588ec20 | 5522 | } |
5f5c8ee5 | 5523 | |
6b61353c KH |
5524 | *dx = x0; |
5525 | *dy = y0; | |
5526 | ||
5f5c8ee5 | 5527 | return string; |
4588ec20 | 5528 | } |
5f5c8ee5 GM |
5529 | |
5530 | ||
db1db309 GM |
5531 | /* Value is the string under window-relative coordinates X/Y in either |
5532 | marginal area, or nil if none. *CHARPOS is set to the position in | |
5533 | the string returned. */ | |
5534 | ||
5535 | Lisp_Object | |
971de7fb | 5536 | marginal_area_string (struct window *w, enum window_part part, int *x, int *y, int *charpos, Lisp_Object *object, int *dx, int *dy, int *width, int *height) |
db1db309 GM |
5537 | { |
5538 | struct glyph_row *row = w->current_matrix->rows; | |
5539 | struct glyph *glyph, *end; | |
6b61353c | 5540 | int x0, y0, i, wy = *y; |
641bdbf3 | 5541 | int area; |
db1db309 GM |
5542 | Lisp_Object string = Qnil; |
5543 | ||
641bdbf3 | 5544 | if (part == ON_LEFT_MARGIN) |
db1db309 | 5545 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 5546 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
5547 | area = RIGHT_MARGIN_AREA; |
5548 | else | |
5549 | abort (); | |
5550 | ||
5551 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
5552 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
5553 | break; | |
6b61353c KH |
5554 | y0 = *y - row->y; |
5555 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
db1db309 GM |
5556 | |
5557 | if (row->enabled_p) | |
5558 | { | |
5559 | /* Find the glyph under X. If we find one with a string object, | |
5560 | it's the one we were looking for. */ | |
db1db309 | 5561 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 5562 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5563 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5564 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) |
5565 | + window_box_width (w, LEFT_MARGIN_AREA) | |
5566 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 5567 | else |
7df02016 | 5568 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5569 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5570 | : 0); |
5571 | ||
6b61353c KH |
5572 | glyph = row->glyphs[area]; |
5573 | end = glyph + row->used[area]; | |
cfde341f | 5574 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5575 | x0 -= glyph->pixel_width; |
5576 | *x = glyph - row->glyphs[area]; | |
5577 | if (glyph < end) | |
5578 | { | |
5579 | string = glyph->object; | |
5580 | *charpos = glyph->charpos; | |
5581 | *width = glyph->pixel_width; | |
5582 | *height = glyph->ascent + glyph->descent; | |
5583 | #ifdef HAVE_WINDOW_SYSTEM | |
5584 | if (glyph->type == IMAGE_GLYPH) | |
5585 | { | |
5586 | struct image *img; | |
5587 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5588 | if (img != NULL) | |
5589 | *object = img->spec; | |
5590 | y0 -= row->ascent - glyph->ascent; | |
cedd7cd9 KS |
5591 | x0 += glyph->slice.x; |
5592 | y0 += glyph->slice.y; | |
6b61353c KH |
5593 | } |
5594 | #endif | |
5595 | } | |
5596 | else | |
5597 | { | |
5598 | /* Add extra (default width) columns if clicked after EOL. */ | |
5599 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5600 | *width = 0; | |
5601 | *height = row->height; | |
5602 | } | |
db1db309 | 5603 | } |
6b61353c KH |
5604 | else |
5605 | { | |
5606 | x0 = 0; | |
5607 | *x = 0; | |
5608 | *width = *height = 0; | |
5609 | } | |
5610 | ||
5611 | *dx = x0; | |
5612 | *dy = y0; | |
db1db309 GM |
5613 | |
5614 | return string; | |
5615 | } | |
5616 | ||
5617 | ||
5f5c8ee5 GM |
5618 | /*********************************************************************** |
5619 | Changing Frame Sizes | |
5620 | ***********************************************************************/ | |
4588ec20 JB |
5621 | |
5622 | #ifdef SIGWINCH | |
5f5c8ee5 | 5623 | |
efb859b4 | 5624 | SIGTYPE |
971de7fb DN |
5625 | window_change_signal (int signalnum) /* If we don't have an argument, */ |
5626 | /* some compilers complain in signal calls. */ | |
4588ec20 JB |
5627 | { |
5628 | int width, height; | |
4588ec20 JB |
5629 | int old_errno = errno; |
5630 | ||
28d7d09f | 5631 | struct tty_display_info *tty; |
4d553a13 | 5632 | |
333f1b6f JD |
5633 | signal (SIGWINCH, window_change_signal); |
5634 | SIGNAL_THREAD_CHECK (signalnum); | |
5635 | ||
9628b887 KL |
5636 | /* The frame size change obviously applies to a single |
5637 | termcap-controlled terminal, but we can't decide which. | |
5638 | Therefore, we resize the frames corresponding to each tty. | |
9628b887 KL |
5639 | */ |
5640 | for (tty = tty_list; tty; tty = tty->next) { | |
4588ec20 | 5641 | |
0a125897 KL |
5642 | if (! tty->term_initted) |
5643 | continue; | |
4588ec20 | 5644 | |
db878925 DN |
5645 | /* Suspended tty frames have tty->input == NULL avoid trying to |
5646 | use it. */ | |
5647 | if (!tty->input) | |
5648 | continue; | |
5649 | ||
0b0d3e0b | 5650 | get_tty_size (fileno (tty->input), &width, &height); |
3fc809e2 | 5651 | |
bedeffcf | 5652 | if (width > 5 && height > 2) { |
9628b887 | 5653 | Lisp_Object tail, frame; |
3fc809e2 | 5654 | |
9628b887 | 5655 | FOR_EACH_FRAME (tail, frame) |
4d553a13 KL |
5656 | if (FRAME_TERMCAP_P (XFRAME (frame)) && FRAME_TTY (XFRAME (frame)) == tty) |
5657 | /* Record the new sizes, but don't reallocate the data | |
5658 | structures now. Let that be done later outside of the | |
5659 | signal handler. */ | |
5660 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); | |
9628b887 | 5661 | } |
4588ec20 | 5662 | } |
3fc809e2 | 5663 | |
4588ec20 JB |
5664 | errno = old_errno; |
5665 | } | |
5666 | #endif /* SIGWINCH */ | |
5667 | ||
5668 | ||
b96fd3e8 GM |
5669 | /* Do any change in frame size that was requested by a signal. SAFE |
5670 | non-zero means this function is called from a place where it is | |
5671 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 5672 | |
dfcf069d | 5673 | void |
971de7fb | 5674 | do_pending_window_change (int safe) |
4588ec20 JB |
5675 | { |
5676 | /* If window_change_signal should have run before, run it now. */ | |
b96fd3e8 GM |
5677 | if (redisplaying_p && !safe) |
5678 | return; | |
177c0ea7 | 5679 | |
4588ec20 JB |
5680 | while (delayed_size_change) |
5681 | { | |
35f56f96 | 5682 | Lisp_Object tail, frame; |
4588ec20 JB |
5683 | |
5684 | delayed_size_change = 0; | |
5685 | ||
35f56f96 | 5686 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5687 | { |
5f5c8ee5 | 5688 | struct frame *f = XFRAME (frame); |
35f56f96 | 5689 | |
7df02016 KS |
5690 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
5691 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
5692 | 0, 0, safe); | |
4588ec20 JB |
5693 | } |
5694 | } | |
5695 | } | |
5696 | ||
5697 | ||
502b9b64 | 5698 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 5699 | indicate no change is to take place. |
4588ec20 | 5700 | |
b6a65ac2 JB |
5701 | If DELAY is non-zero, then assume we're being called from a signal |
5702 | handler, and queue the change for later - perhaps the next | |
5703 | redisplay. Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
5704 | from a signal handler. |
5705 | ||
5706 | SAFE non-zero means this function is called from a place where it's | |
5707 | safe to change frame sizes while a redisplay is in progress. */ | |
b6a65ac2 | 5708 | |
dfcf069d | 5709 | void |
971de7fb | 5710 | change_frame_size (register struct frame *f, int newheight, int newwidth, int pretend, int delay, int safe) |
45140e01 RS |
5711 | { |
5712 | Lisp_Object tail, frame; | |
3826ea1a | 5713 | |
9628b887 | 5714 | if (FRAME_MSDOS_P (f)) |
45140e01 | 5715 | { |
9628b887 KL |
5716 | /* On MS-DOS, all frames use the same screen, so a change in |
5717 | size affects all frames. Termcap now supports multiple | |
5718 | ttys. */ | |
45140e01 | 5719 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 5720 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 5721 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 5722 | pretend, delay, safe); |
45140e01 RS |
5723 | } |
5724 | else | |
b96fd3e8 | 5725 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
5726 | } |
5727 | ||
5728 | static void | |
971de7fb | 5729 | change_frame_size_1 (register struct frame *f, int newheight, int newwidth, int pretend, int delay, int safe) |
4588ec20 | 5730 | { |
7df02016 | 5731 | int new_frame_total_cols; |
aed13378 | 5732 | int count = SPECPDL_INDEX (); |
3826ea1a | 5733 | |
4588ec20 | 5734 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 5735 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 5736 | { |
7df02016 KS |
5737 | f->new_text_lines = newheight; |
5738 | f->new_text_cols = newwidth; | |
4588ec20 JB |
5739 | delayed_size_change = 1; |
5740 | return; | |
5741 | } | |
5742 | ||
502b9b64 | 5743 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
5744 | f->new_text_lines = 0; |
5745 | f->new_text_cols = 0; | |
b6a65ac2 | 5746 | |
08f7aa3e | 5747 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 5748 | if (newheight == 0) |
7df02016 | 5749 | newheight = FRAME_LINES (f); |
ae19c6f2 | 5750 | if (newwidth == 0) |
7df02016 | 5751 | newwidth = FRAME_COLS (f); |
3826ea1a | 5752 | |
5f5c8ee5 GM |
5753 | /* Compute width of windows in F. |
5754 | This is the width of the frame without vertical scroll bars. */ | |
7df02016 | 5755 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); |
3826ea1a | 5756 | |
b6a65ac2 | 5757 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 5758 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 JB |
5759 | |
5760 | /* If we're not changing the frame size, quit now. */ | |
5075d853 JD |
5761 | /* Frame width may be unchanged but the text portion may change, for example, |
5762 | fullscreen and remove/add scroll bar. */ | |
7df02016 | 5763 | if (newheight == FRAME_LINES (f) |
5075d853 JD |
5764 | && newwidth == FRAME_COLS (f) // text portion unchanged |
5765 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) // frame width unchanged | |
4588ec20 JB |
5766 | return; |
5767 | ||
cbb95688 RS |
5768 | BLOCK_INPUT; |
5769 | ||
886a8a6c KH |
5770 | #ifdef MSDOS |
5771 | /* We only can set screen dimensions to certain values supported | |
5772 | by our video hardware. Try to find the smallest size greater | |
5773 | or equal to the requested dimensions. */ | |
5774 | dos_set_window_size (&newheight, &newwidth); | |
5775 | #endif | |
5776 | ||
7df02016 | 5777 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 5778 | { |
5f5c8ee5 | 5779 | if (FRAME_HAS_MINIBUF_P (f) && !FRAME_MINIBUF_ONLY_P (f)) |
4588ec20 | 5780 | { |
5f5c8ee5 | 5781 | /* Frame has both root and mini-buffer. */ |
7df02016 | 5782 | XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f))->top_line, |
5f5c8ee5 GM |
5783 | FRAME_TOP_MARGIN (f)); |
5784 | set_window_height (FRAME_ROOT_WINDOW (f), | |
5785 | (newheight | |
5786 | - 1 | |
5787 | - FRAME_TOP_MARGIN (f)), | |
f8748f0f | 5788 | 2); |
7df02016 | 5789 | XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top_line, |
a5d8b611 | 5790 | newheight - 1); |
5f5c8ee5 | 5791 | set_window_height (FRAME_MINIBUF_WINDOW (f), 1, 0); |
4588ec20 JB |
5792 | } |
5793 | else | |
502b9b64 | 5794 | /* Frame has just one top-level window. */ |
5f5c8ee5 | 5795 | set_window_height (FRAME_ROOT_WINDOW (f), |
f8748f0f | 5796 | newheight - FRAME_TOP_MARGIN (f), 2); |
b6a65ac2 | 5797 | |
48e482e6 EZ |
5798 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5799 | manipulating video hardware. */ | |
5800 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5801 | FrameRows (FRAME_TTY (f)) = newheight; |
4588ec20 JB |
5802 | } |
5803 | ||
7df02016 | 5804 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 5805 | { |
f8748f0f | 5806 | set_window_width (FRAME_ROOT_WINDOW (f), new_frame_total_cols, 2); |
5f5c8ee5 | 5807 | if (FRAME_HAS_MINIBUF_P (f)) |
7df02016 | 5808 | set_window_width (FRAME_MINIBUF_WINDOW (f), new_frame_total_cols, 0); |
4588ec20 | 5809 | |
48e482e6 EZ |
5810 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5811 | manipulating video hardware. */ | |
5812 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5813 | FrameCols (FRAME_TTY (f)) = newwidth; |
5f5c8ee5 | 5814 | |
9ea173e8 | 5815 | if (WINDOWP (f->tool_bar_window)) |
7df02016 | 5816 | XSETFASTINT (XWINDOW (f->tool_bar_window)->total_cols, newwidth); |
4588ec20 JB |
5817 | } |
5818 | ||
7df02016 KS |
5819 | FRAME_LINES (f) = newheight; |
5820 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 5821 | |
5f5c8ee5 GM |
5822 | { |
5823 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
5824 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 5825 | |
5f5c8ee5 GM |
5826 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
5827 | &text_area_height); | |
5828 | if (w->cursor.x >= text_area_x + text_area_width) | |
5829 | w->cursor.hpos = w->cursor.x = 0; | |
5830 | if (w->cursor.y >= text_area_y + text_area_height) | |
5831 | w->cursor.vpos = w->cursor.y = 0; | |
5832 | } | |
986e61b8 | 5833 | |
5f5c8ee5 | 5834 | adjust_glyphs (f); |
5f5c8ee5 | 5835 | calculate_costs (f); |
cb02fa39 GM |
5836 | SET_FRAME_GARBAGED (f); |
5837 | f->resized_p = 1; | |
97cf50e7 RS |
5838 | |
5839 | UNBLOCK_INPUT; | |
61730a69 | 5840 | |
e523f7e5 RS |
5841 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); |
5842 | ||
ef264c42 | 5843 | run_window_configuration_change_hook (f); |
e523f7e5 RS |
5844 | |
5845 | unbind_to (count, Qnil); | |
4588ec20 | 5846 | } |
5f5c8ee5 GM |
5847 | |
5848 | ||
4588ec20 | 5849 | \f |
5f5c8ee5 GM |
5850 | /*********************************************************************** |
5851 | Terminal Related Lisp Functions | |
5852 | ***********************************************************************/ | |
5853 | ||
5854 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 5855 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
5856 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
5857 | FILE = nil means just close any termscript file currently open. */) | |
5858 | (file) | |
5f5c8ee5 GM |
5859 | Lisp_Object file; |
5860 | { | |
0b0d3e0b KL |
5861 | struct tty_display_info *tty; |
5862 | ||
7d2f1216 EZ |
5863 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ()) |
5864 | && ! FRAME_MSDOS_P (SELECTED_FRAME ())) | |
0b0d3e0b KL |
5865 | error ("Current frame is not on a tty device"); |
5866 | ||
5867 | tty = CURTTY (); | |
5868 | ||
5869 | if (tty->termscript != 0) | |
e18c7093 KL |
5870 | { |
5871 | BLOCK_INPUT; | |
0b0d3e0b | 5872 | fclose (tty->termscript); |
e18c7093 KL |
5873 | UNBLOCK_INPUT; |
5874 | } | |
0b0d3e0b | 5875 | tty->termscript = 0; |
5f5c8ee5 GM |
5876 | |
5877 | if (! NILP (file)) | |
5878 | { | |
5879 | file = Fexpand_file_name (file, Qnil); | |
0b0d3e0b KL |
5880 | tty->termscript = fopen (SDATA (file), "w"); |
5881 | if (tty->termscript == 0) | |
5f5c8ee5 GM |
5882 | report_file_error ("Opening termscript", Fcons (file, Qnil)); |
5883 | } | |
5884 | return Qnil; | |
5885 | } | |
5886 | ||
5887 | ||
4588ec20 | 5888 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
62af879c | 5889 | Ssend_string_to_terminal, 1, 2, 0, |
7ee72033 | 5890 | doc: /* Send STRING to the terminal without alteration. |
62af879c KL |
5891 | Control characters in STRING will have terminal-dependent effects. |
5892 | ||
6ed8eeff | 5893 | Optional parameter TERMINAL specifies the tty terminal device to use. |
558759e4 AM |
5894 | It may be a terminal object, a frame, or nil for the terminal used by |
5895 | the currently selected frame. In batch mode, STRING is sent to stdout | |
5896 | when TERMINAL is nil. */) | |
6ed8eeff | 5897 | (string, terminal) |
e912ba09 | 5898 | Lisp_Object string; |
6ed8eeff | 5899 | Lisp_Object terminal; |
4588ec20 | 5900 | { |
7cef7ce3 SM |
5901 | struct terminal *t = get_terminal (terminal, 1); |
5902 | FILE *out; | |
0b0d3e0b | 5903 | |
94f3db62 | 5904 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 5905 | CHECK_STRING (string); |
2c1e4409 | 5906 | BLOCK_INPUT; |
0b0d3e0b | 5907 | |
6ed8eeff KL |
5908 | if (!t) |
5909 | error ("Unknown terminal device"); | |
0b0d3e0b | 5910 | |
7cef7ce3 SM |
5911 | if (t->type == output_initial) |
5912 | out = stdout; | |
5913 | else if (t->type != output_termcap && t->type != output_msdos_raw) | |
5914 | error ("Device %d is not a termcap terminal device", t->id); | |
5915 | else | |
5916 | { | |
5917 | struct tty_display_info *tty = t->display_info.tty; | |
3fc809e2 | 5918 | |
7cef7ce3 SM |
5919 | if (! tty->output) |
5920 | error ("Terminal is currently suspended"); | |
cecfdea6 | 5921 | |
7cef7ce3 SM |
5922 | if (tty->termscript) |
5923 | { | |
5924 | fwrite (SDATA (string), 1, SBYTES (string), tty->termscript); | |
5925 | fflush (tty->termscript); | |
5926 | } | |
5927 | out = tty->output; | |
4588ec20 | 5928 | } |
7cef7ce3 SM |
5929 | fwrite (SDATA (string), 1, SBYTES (string), out); |
5930 | fflush (out); | |
2c1e4409 | 5931 | UNBLOCK_INPUT; |
4588ec20 JB |
5932 | return Qnil; |
5933 | } | |
5934 | ||
5f5c8ee5 | 5935 | |
4588ec20 | 5936 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 5937 | doc: /* Beep, or flash the screen. |
228299fa | 5938 | Also, unless an argument is given, |
7ee72033 MB |
5939 | terminate any keyboard macro currently executing. */) |
5940 | (arg) | |
4588ec20 JB |
5941 | Lisp_Object arg; |
5942 | { | |
efb859b4 | 5943 | if (!NILP (arg)) |
4588ec20 | 5944 | { |
7fa788da RS |
5945 | if (noninteractive) |
5946 | putchar (07); | |
5947 | else | |
385ed61f | 5948 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5949 | } |
5950 | else | |
5951 | bitch_at_user (); | |
5952 | ||
5953 | return Qnil; | |
5954 | } | |
5955 | ||
dfcf069d | 5956 | void |
971de7fb | 5957 | bitch_at_user (void) |
4588ec20 JB |
5958 | { |
5959 | if (noninteractive) | |
5960 | putchar (07); | |
5f5c8ee5 | 5961 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
4588ec20 JB |
5962 | error ("Keyboard macro terminated by a command ringing the bell"); |
5963 | else | |
385ed61f | 5964 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5965 | } |
5966 | ||
5f5c8ee5 GM |
5967 | |
5968 | \f | |
5969 | /*********************************************************************** | |
5970 | Sleeping, Waiting | |
5971 | ***********************************************************************/ | |
5972 | ||
4588ec20 | 5973 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 5974 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
5975 | SECONDS may be a floating-point value, meaning that you can wait for a |
5976 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
5977 | additional wait period, in milliseconds; this may be useful if your | |
5978 | Emacs was built without floating point support. | |
7ee72033 MB |
5979 | \(Not all operating systems support waiting for a fraction of a second.) */) |
5980 | (seconds, milliseconds) | |
767229f8 | 5981 | Lisp_Object seconds, milliseconds; |
4588ec20 | 5982 | { |
767229f8 | 5983 | int sec, usec; |
4588ec20 | 5984 | |
767229f8 | 5985 | if (NILP (milliseconds)) |
e9c9a718 | 5986 | XSETINT (milliseconds, 0); |
767229f8 | 5987 | else |
b7826503 | 5988 | CHECK_NUMBER (milliseconds); |
b07646f5 JB |
5989 | usec = XINT (milliseconds) * 1000; |
5990 | ||
b07646f5 JB |
5991 | { |
5992 | double duration = extract_float (seconds); | |
5993 | sec = (int) duration; | |
5994 | usec += (duration - sec) * 1000000; | |
5995 | } | |
4588ec20 | 5996 | |
a41f8bed | 5997 | #ifndef EMACS_HAS_USECS |
767229f8 | 5998 | if (sec == 0 && usec != 0) |
861e19b9 | 5999 | error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); |
4588ec20 | 6000 | #endif |
767229f8 JB |
6001 | |
6002 | /* Assure that 0 <= usec < 1000000. */ | |
6003 | if (usec < 0) | |
6004 | { | |
153a073c | 6005 | /* We can't rely on the rounding being correct if usec is negative. */ |
767229f8 JB |
6006 | if (-1000000 < usec) |
6007 | sec--, usec += 1000000; | |
6008 | else | |
6009 | sec -= -usec / 1000000, usec = 1000000 - (-usec % 1000000); | |
4588ec20 | 6010 | } |
767229f8 JB |
6011 | else |
6012 | sec += usec / 1000000, usec %= 1000000; | |
6013 | ||
6b5153b1 | 6014 | if (sec < 0 || (sec == 0 && usec == 0)) |
767229f8 | 6015 | return Qnil; |
4588ec20 | 6016 | |
dcd1ca45 | 6017 | wait_reading_process_output (sec, usec, 0, 0, Qnil, NULL, 0); |
4588ec20 JB |
6018 | |
6019 | return Qnil; | |
6020 | } | |
6021 | ||
5f5c8ee5 | 6022 | |
dcd1ca45 | 6023 | /* This is just like wait_reading_process_output, except that |
902b9b6d | 6024 | it does redisplay. |
f76475ad | 6025 | |
2bcac766 CY |
6026 | TIMEOUT is number of seconds to wait (float or integer), |
6027 | or t to wait forever. | |
902b9b6d KS |
6028 | READING is 1 if reading input. |
6029 | If DO_DISPLAY is >0 display process output while waiting. | |
6030 | If DO_DISPLAY is >1 perform an initial redisplay before waiting. | |
6031 | */ | |
4588ec20 | 6032 | |
f76475ad | 6033 | Lisp_Object |
971de7fb | 6034 | sit_for (Lisp_Object timeout, int reading, int do_display) |
f76475ad | 6035 | { |
902b9b6d | 6036 | int sec, usec; |
f222369e | 6037 | |
902b9b6d | 6038 | swallow_events (do_display); |
ccddf474 | 6039 | |
902b9b6d | 6040 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 6041 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 6042 | return Qnil; |
4588ec20 | 6043 | |
902b9b6d KS |
6044 | if (do_display >= 2) |
6045 | redisplay_preserve_echo_area (2); | |
6046 | ||
8e09f23f | 6047 | if (INTEGERP (timeout)) |
f222369e | 6048 | { |
7ff14773 | 6049 | sec = XINT (timeout); |
8e09f23f | 6050 | usec = 0; |
f222369e | 6051 | } |
8e09f23f KS |
6052 | else if (FLOATP (timeout)) |
6053 | { | |
99a20368 | 6054 | double seconds = XFLOAT_DATA (timeout); |
902b9b6d KS |
6055 | sec = (int) seconds; |
6056 | usec = (int) ((seconds - sec) * 1000000); | |
6057 | } | |
2bcac766 CY |
6058 | else if (EQ (timeout, Qt)) |
6059 | { | |
6060 | sec = 0; | |
6061 | usec = 0; | |
6062 | } | |
902b9b6d | 6063 | else |
8e09f23f | 6064 | wrong_type_argument (Qnumberp, timeout); |
4588ec20 | 6065 | |
2bcac766 | 6066 | if (sec == 0 && usec == 0 && !EQ (timeout, Qt)) |
dfdb645c JB |
6067 | return Qt; |
6068 | ||
4588ec20 | 6069 | #ifdef SIGIO |
8fc798e9 | 6070 | gobble_input (0); |
f76475ad JB |
6071 | #endif |
6072 | ||
902b9b6d | 6073 | wait_reading_process_output (sec, usec, reading ? -1 : 1, do_display, |
dcd1ca45 | 6074 | Qnil, NULL, 0); |
f76475ad | 6075 | |
4588ec20 JB |
6076 | return detect_input_pending () ? Qnil : Qt; |
6077 | } | |
6078 | ||
5f5c8ee5 | 6079 | |
01327edf KS |
6080 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
6081 | doc: /* Perform redisplay if no input is available. | |
a5c2c707 | 6082 | If optional arg FORCE is non-nil or `redisplay-dont-pause' is non-nil, |
03240971 KS |
6083 | perform a full redisplay even if input is available. |
6084 | Return t if redisplay was performed, nil otherwise. */) | |
01327edf KS |
6085 | (force) |
6086 | Lisp_Object force; | |
f76475ad | 6087 | { |
01327edf | 6088 | int count; |
659d9874 | 6089 | |
902b9b6d KS |
6090 | swallow_events (1); |
6091 | if ((detect_input_pending_run_timers (1) | |
01327edf | 6092 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
6093 | || !NILP (Vexecuting_kbd_macro)) |
6094 | return Qnil; | |
f76475ad | 6095 | |
01327edf KS |
6096 | count = SPECPDL_INDEX (); |
6097 | if (!NILP (force) && !redisplay_dont_pause) | |
6098 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 6099 | redisplay_preserve_echo_area (2); |
01327edf | 6100 | unbind_to (count, Qnil); |
7ba07a1a | 6101 | return Qt; |
f76475ad | 6102 | } |
5f5c8ee5 GM |
6103 | |
6104 | ||
6105 | \f | |
6106 | /*********************************************************************** | |
6107 | Other Lisp Functions | |
6108 | ***********************************************************************/ | |
6109 | ||
6110 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
6111 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 6112 | buffer-modified-flags. */ |
5f5c8ee5 GM |
6113 | |
6114 | static Lisp_Object frame_and_buffer_state; | |
6115 | ||
6116 | ||
6117 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 6118 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 6119 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
6120 | VARIABLE is a variable name whose value is either nil or a state vector |
6121 | that will be updated to contain all frames and buffers, | |
228299fa | 6122 | aside from buffers whose names start with space, |
44edd521 RS |
6123 | along with the buffers' read-only and modified flags. This allows a fast |
6124 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 6125 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
6126 | the current state. |
6127 | ||
6128 | If VARIABLE is nil, an internal variable is used. Users should not | |
6129 | pass nil for VARIABLE. */) | |
6130 | (variable) | |
6131 | Lisp_Object variable; | |
5f5c8ee5 | 6132 | { |
44edd521 RS |
6133 | Lisp_Object state, tail, frame, buf; |
6134 | Lisp_Object *vecp, *end; | |
5f5c8ee5 GM |
6135 | int n; |
6136 | ||
44edd521 RS |
6137 | if (! NILP (variable)) |
6138 | { | |
6139 | CHECK_SYMBOL (variable); | |
6140 | state = Fsymbol_value (variable); | |
6141 | if (! VECTORP (state)) | |
6142 | goto changed; | |
6143 | } | |
6144 | else | |
6145 | state = frame_and_buffer_state; | |
6146 | ||
6147 | vecp = XVECTOR (state)->contents; | |
6148 | end = vecp + XVECTOR (state)->size; | |
6149 | ||
5f5c8ee5 GM |
6150 | FOR_EACH_FRAME (tail, frame) |
6151 | { | |
44edd521 RS |
6152 | if (vecp == end) |
6153 | goto changed; | |
5f5c8ee5 GM |
6154 | if (!EQ (*vecp++, frame)) |
6155 | goto changed; | |
44edd521 RS |
6156 | if (vecp == end) |
6157 | goto changed; | |
5f5c8ee5 GM |
6158 | if (!EQ (*vecp++, XFRAME (frame)->name)) |
6159 | goto changed; | |
6160 | } | |
44edd521 | 6161 | /* Check that the buffer info matches. */ |
7539e11f | 6162 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6163 | { |
7539e11f | 6164 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6165 | /* Ignore buffers that aren't included in buffer lists. */ |
d5db4077 | 6166 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
5f5c8ee5 | 6167 | continue; |
44edd521 RS |
6168 | if (vecp == end) |
6169 | goto changed; | |
5f5c8ee5 GM |
6170 | if (!EQ (*vecp++, buf)) |
6171 | goto changed; | |
44edd521 RS |
6172 | if (vecp == end) |
6173 | goto changed; | |
5f5c8ee5 GM |
6174 | if (!EQ (*vecp++, XBUFFER (buf)->read_only)) |
6175 | goto changed; | |
44edd521 RS |
6176 | if (vecp == end) |
6177 | goto changed; | |
5f5c8ee5 GM |
6178 | if (!EQ (*vecp++, Fbuffer_modified_p (buf))) |
6179 | goto changed; | |
6180 | } | |
44edd521 RS |
6181 | if (vecp == end) |
6182 | goto changed; | |
5f5c8ee5 GM |
6183 | /* Detect deletion of a buffer at the end of the list. */ |
6184 | if (EQ (*vecp, Qlambda)) | |
6185 | return Qnil; | |
44edd521 RS |
6186 | |
6187 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 6188 | changed: |
44edd521 RS |
6189 | /* Count the size we will need. |
6190 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
6191 | n = 1; |
6192 | FOR_EACH_FRAME (tail, frame) | |
6193 | n += 2; | |
7539e11f | 6194 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6195 | n += 3; |
44edd521 RS |
6196 | /* Reallocate the vector if data has grown to need it, |
6197 | or if it has shrunk a lot. */ | |
6198 | if (! VECTORP (state) | |
6199 | || n > XVECTOR (state)->size | |
6200 | || n + 20 < XVECTOR (state)->size / 2) | |
5f5c8ee5 | 6201 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
6202 | { |
6203 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
6204 | if (! NILP (variable)) | |
6205 | Fset (variable, state); | |
6206 | else | |
6207 | frame_and_buffer_state = state; | |
6208 | } | |
6209 | ||
6210 | /* Record the new data in the (possibly reallocated) vector. */ | |
6211 | vecp = XVECTOR (state)->contents; | |
5f5c8ee5 GM |
6212 | FOR_EACH_FRAME (tail, frame) |
6213 | { | |
6214 | *vecp++ = frame; | |
6215 | *vecp++ = XFRAME (frame)->name; | |
6216 | } | |
7539e11f | 6217 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6218 | { |
7539e11f | 6219 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6220 | /* Ignore buffers that aren't included in buffer lists. */ |
d5db4077 | 6221 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
5f5c8ee5 GM |
6222 | continue; |
6223 | *vecp++ = buf; | |
6224 | *vecp++ = XBUFFER (buf)->read_only; | |
6225 | *vecp++ = Fbuffer_modified_p (buf); | |
6226 | } | |
6227 | /* Fill up the vector with lambdas (always at least one). */ | |
6228 | *vecp++ = Qlambda; | |
44edd521 RS |
6229 | while (vecp - XVECTOR (state)->contents |
6230 | < XVECTOR (state)->size) | |
5f5c8ee5 GM |
6231 | *vecp++ = Qlambda; |
6232 | /* Make sure we didn't overflow the vector. */ | |
44edd521 RS |
6233 | if (vecp - XVECTOR (state)->contents |
6234 | > XVECTOR (state)->size) | |
5f5c8ee5 GM |
6235 | abort (); |
6236 | return Qt; | |
6237 | } | |
6238 | ||
6239 | ||
4588ec20 | 6240 | \f |
5f5c8ee5 GM |
6241 | /*********************************************************************** |
6242 | Initialization | |
6243 | ***********************************************************************/ | |
6244 | ||
5f5c8ee5 GM |
6245 | /* Initialization done when Emacs fork is started, before doing stty. |
6246 | Determine terminal type and set terminal_driver. Then invoke its | |
6247 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 6248 | |
dfcf069d | 6249 | void |
971de7fb | 6250 | init_display (void) |
4588ec20 | 6251 | { |
28d440ab KL |
6252 | char *terminal_type; |
6253 | ||
4588ec20 JB |
6254 | #ifdef HAVE_X_WINDOWS |
6255 | extern int display_arg; | |
6256 | #endif | |
6257 | ||
5f5c8ee5 GM |
6258 | /* Construct the space glyph. */ |
6259 | space_glyph.type = CHAR_GLYPH; | |
3fc809e2 | 6260 | SET_CHAR_GLYPH (space_glyph, ' ', DEFAULT_FACE_ID, 0); |
5f5c8ee5 GM |
6261 | space_glyph.charpos = -1; |
6262 | ||
4588ec20 JB |
6263 | inverse_video = 0; |
6264 | cursor_in_echo_area = 0; | |
6265 | terminal_type = (char *) 0; | |
6266 | ||
1315c181 JB |
6267 | /* Now is the time to initialize this; it's used by init_sys_modes |
6268 | during startup. */ | |
2246281f | 6269 | Vinitial_window_system = Qnil; |
4588ec20 | 6270 | |
4181ad9c KL |
6271 | /* SIGWINCH needs to be handled no matter what display we start |
6272 | with. Otherwise newly opened tty frames will not resize | |
6273 | automatically. */ | |
6274 | #ifdef SIGWINCH | |
6275 | #ifndef CANNOT_DUMP | |
6276 | if (initialized) | |
6277 | #endif /* CANNOT_DUMP */ | |
6278 | signal (SIGWINCH, window_change_signal); | |
6279 | #endif /* SIGWINCH */ | |
4588ec20 | 6280 | |
d6ef42b9 | 6281 | /* If running as a daemon, no need to initialize any frames/terminal. */ |
ff808935 DN |
6282 | if (IS_DAEMON) |
6283 | return; | |
d6ef42b9 | 6284 | |
1315c181 JB |
6285 | /* If the user wants to use a window system, we shouldn't bother |
6286 | initializing the terminal. This is especially important when the | |
6287 | terminal is so dumb that emacs gives up before and doesn't bother | |
6288 | using the window system. | |
4588ec20 | 6289 | |
36bbad1d KH |
6290 | If the DISPLAY environment variable is set and nonempty, |
6291 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6292 | |
6293 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 6294 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 6295 | { |
36bbad1d | 6296 | char *display; |
36bbad1d | 6297 | display = getenv ("DISPLAY"); |
36bbad1d | 6298 | display_arg = (display != 0 && *display != 0); |
c1fc674b AS |
6299 | |
6300 | if (display_arg && !x_display_ok (display)) | |
6301 | { | |
6302 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
6303 | display); | |
6304 | inhibit_window_system = 1; | |
6305 | } | |
f040093a | 6306 | } |
d460af17 | 6307 | |
177c0ea7 | 6308 | if (!inhibit_window_system && display_arg |
9e4555e8 RS |
6309 | #ifndef CANNOT_DUMP |
6310 | && initialized | |
6311 | #endif | |
6312 | ) | |
4588ec20 | 6313 | { |
111d9af3 | 6314 | Vinitial_window_system = Qx; |
4588ec20 JB |
6315 | #ifdef HAVE_X11 |
6316 | Vwindow_system_version = make_number (11); | |
039e5d71 | 6317 | #endif |
8a2a6032 | 6318 | #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES) |
039e5d71 | 6319 | /* In some versions of ncurses, |
6a428f77 | 6320 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6321 | So call tgetent. */ |
6322 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 | 6323 | #endif |
5f5c8ee5 | 6324 | adjust_frame_glyphs_initially (); |
4588ec20 JB |
6325 | return; |
6326 | } | |
6327 | #endif /* HAVE_X_WINDOWS */ | |
6328 | ||
fd2e066a | 6329 | #ifdef HAVE_NTGUI |
177c0ea7 | 6330 | if (!inhibit_window_system) |
fd2e066a | 6331 | { |
111d9af3 | 6332 | Vinitial_window_system = Qw32; |
fd2e066a | 6333 | Vwindow_system_version = make_number (1); |
5f5c8ee5 | 6334 | adjust_frame_glyphs_initially (); |
fd2e066a GV |
6335 | return; |
6336 | } | |
6337 | #endif /* HAVE_NTGUI */ | |
6338 | ||
edfda783 AR |
6339 | #ifdef HAVE_NS |
6340 | if (!inhibit_window_system | |
6341 | #ifndef CANNOT_DUMP | |
6342 | && initialized | |
6343 | #endif | |
6344 | ) | |
6345 | { | |
111d9af3 | 6346 | Vinitial_window_system = Qns; |
edfda783 AR |
6347 | Vwindow_system_version = make_number(10); |
6348 | adjust_frame_glyphs_initially (); | |
6349 | return; | |
6350 | } | |
6351 | #endif | |
6352 | ||
4588ec20 JB |
6353 | /* If no window system has been specified, try to use the terminal. */ |
6354 | if (! isatty (0)) | |
6355 | { | |
1559a86d | 6356 | fatal ("standard input is not a tty"); |
4588ec20 JB |
6357 | exit (1); |
6358 | } | |
6359 | ||
6152361f JR |
6360 | #ifdef WINDOWSNT |
6361 | terminal_type = "w32console"; | |
6362 | #else | |
153a073c | 6363 | /* Look at the TERM variable. */ |
4588ec20 | 6364 | terminal_type = (char *) getenv ("TERM"); |
6152361f | 6365 | #endif |
4588ec20 JB |
6366 | if (!terminal_type) |
6367 | { | |
5d12ff0b | 6368 | #ifdef HAVE_WINDOW_SYSTEM |
b9e590fc RS |
6369 | if (! inhibit_window_system) |
6370 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6371 | else |
6372 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6373 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
4588ec20 JB |
6374 | exit (1); |
6375 | } | |
6376 | ||
0a125897 | 6377 | { |
6ed8eeff | 6378 | struct terminal *t; |
3224dac1 KL |
6379 | struct frame *f = XFRAME (selected_frame); |
6380 | ||
6381 | /* Open a display on the controlling tty. */ | |
6ed8eeff | 6382 | t = init_tty (0, terminal_type, 1); /* Errors are fatal. */ |
3224dac1 KL |
6383 | |
6384 | /* Convert the initial frame to use the new display. */ | |
b04f5ad2 | 6385 | if (f->output_method != output_initial) |
3224dac1 | 6386 | abort (); |
6ed8eeff KL |
6387 | f->output_method = t->type; |
6388 | f->terminal = t; | |
3224dac1 | 6389 | |
6ed8eeff KL |
6390 | t->reference_count++; |
6391 | t->display_info.tty->top_frame = selected_frame; | |
5b65d888 | 6392 | change_frame_size (XFRAME (selected_frame), |
6ed8eeff KL |
6393 | FrameRows (t->display_info.tty), |
6394 | FrameCols (t->display_info.tty), 0, 0, 1); | |
3224dac1 | 6395 | |
6ed8eeff KL |
6396 | /* Delete the initial terminal. */ |
6397 | if (--initial_terminal->reference_count == 0 | |
6398 | && initial_terminal->delete_terminal_hook) | |
6399 | (*initial_terminal->delete_terminal_hook) (initial_terminal); | |
2666355c KL |
6400 | |
6401 | /* Update frame parameters to reflect the new type. */ | |
6402 | Fmodify_frame_parameters | |
6403 | (selected_frame, Fcons (Fcons (Qtty_type, | |
6ed8eeff | 6404 | Ftty_type (selected_frame)), Qnil)); |
657ceaa0 EZ |
6405 | if (t->display_info.tty->name) |
6406 | Fmodify_frame_parameters (selected_frame, | |
6407 | Fcons (Fcons (Qtty, build_string (t->display_info.tty->name)), | |
6408 | Qnil)); | |
6409 | else | |
6410 | Fmodify_frame_parameters (selected_frame, Fcons (Fcons (Qtty, Qnil), | |
6411 | Qnil)); | |
0a125897 | 6412 | } |
3fc809e2 | 6413 | |
d86c299a | 6414 | { |
91fb7e1b | 6415 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6416 | int width = FRAME_TOTAL_COLS (sf); |
6417 | int height = FRAME_LINES (sf); | |
d86c299a | 6418 | |
5f5c8ee5 | 6419 | unsigned int total_glyphs = height * (width + 2) * sizeof (struct glyph); |
d86c299a | 6420 | |
5f5c8ee5 GM |
6421 | /* If these sizes are so big they cause overflow, just ignore the |
6422 | change. It's not clear what better we could do. */ | |
6423 | if (total_glyphs / sizeof (struct glyph) / height != width + 2) | |
1559a86d | 6424 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6425 | } |
6426 | ||
5f5c8ee5 | 6427 | adjust_frame_glyphs_initially (); |
91fb7e1b | 6428 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6429 | |
5f5c8ee5 GM |
6430 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ |
6431 | if (initialized | |
6432 | && !noninteractive | |
2246281f | 6433 | && NILP (Vinitial_window_system)) |
2d764c78 EZ |
6434 | { |
6435 | /* For the initial frame, we don't have any way of knowing what | |
6436 | are the foreground and background colors of the terminal. */ | |
6437 | struct frame *sf = SELECTED_FRAME(); | |
6438 | ||
f9d2fdc4 EZ |
6439 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
6440 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
6441 | call0 (intern ("tty-set-up-initial-frame-faces")); |
6442 | } | |
5f5c8ee5 GM |
6443 | } |
6444 | ||
6445 | ||
6446 | \f | |
6447 | /*********************************************************************** | |
6448 | Blinking cursor | |
6449 | ***********************************************************************/ | |
6450 | ||
c3f13540 | 6451 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 6452 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 6453 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
6454 | WINDOW nil means use the selected window. SHOW non-nil means |
6455 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 MB |
6456 | don't show a cursor. */) |
6457 | (window, show) | |
5d7791b3 | 6458 | Lisp_Object window, show; |
5f5c8ee5 | 6459 | { |
5f5c8ee5 GM |
6460 | /* Don't change cursor state while redisplaying. This could confuse |
6461 | output routines. */ | |
6462 | if (!redisplaying_p) | |
6463 | { | |
6464 | if (NILP (window)) | |
6465 | window = selected_window; | |
6466 | else | |
b7826503 | 6467 | CHECK_WINDOW (window); |
177c0ea7 | 6468 | |
5d7791b3 | 6469 | XWINDOW (window)->cursor_off_p = NILP (show); |
5f5c8ee5 GM |
6470 | } |
6471 | ||
6472 | return Qnil; | |
4588ec20 | 6473 | } |
5f5c8ee5 GM |
6474 | |
6475 | ||
5d7791b3 GM |
6476 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
6477 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 6478 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 MB |
6479 | WINDOW nil or omitted means report on the selected window. */) |
6480 | (window) | |
5d7791b3 GM |
6481 | Lisp_Object window; |
6482 | { | |
6483 | struct window *w; | |
177c0ea7 | 6484 | |
5d7791b3 GM |
6485 | if (NILP (window)) |
6486 | window = selected_window; | |
6487 | else | |
b7826503 | 6488 | CHECK_WINDOW (window); |
177c0ea7 | 6489 | |
5d7791b3 | 6490 | w = XWINDOW (window); |
177c0ea7 | 6491 | return w->cursor_off_p ? Qnil : Qt; |
5d7791b3 GM |
6492 | } |
6493 | ||
87478b52 SM |
6494 | DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame, |
6495 | Slast_nonminibuf_frame, 0, 0, 0, | |
6496 | doc: /* Value is last nonminibuffer frame. */) | |
6497 | () | |
6498 | { | |
4958ed94 | 6499 | Lisp_Object frame = Qnil; |
87478b52 | 6500 | |
4958ed94 SM |
6501 | if (last_nonminibuf_frame) |
6502 | XSETFRAME (frame, last_nonminibuf_frame); | |
87478b52 SM |
6503 | |
6504 | return frame; | |
6505 | } | |
4588ec20 | 6506 | \f |
5f5c8ee5 GM |
6507 | /*********************************************************************** |
6508 | Initialization | |
6509 | ***********************************************************************/ | |
6510 | ||
dfcf069d | 6511 | void |
971de7fb | 6512 | syms_of_display (void) |
4588ec20 | 6513 | { |
502b9b64 | 6514 | defsubr (&Sredraw_frame); |
4588ec20 | 6515 | defsubr (&Sredraw_display); |
078b3696 | 6516 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
6517 | defsubr (&Sopen_termscript); |
6518 | defsubr (&Sding); | |
7ba07a1a | 6519 | defsubr (&Sredisplay); |
4588ec20 JB |
6520 | defsubr (&Ssleep_for); |
6521 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 6522 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 6523 | defsubr (&Sinternal_show_cursor_p); |
87478b52 | 6524 | defsubr (&Slast_nonminibuf_frame); |
4588ec20 | 6525 | |
2d5912c1 | 6526 | #if GLYPH_DEBUG |
9b0e97aa GM |
6527 | defsubr (&Sdump_redisplay_history); |
6528 | #endif | |
6529 | ||
d1dad759 | 6530 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
6531 | staticpro (&frame_and_buffer_state); |
6532 | ||
d67b4f80 | 6533 | Qdisplay_table = intern_c_string ("display-table"); |
9cda4f7c | 6534 | staticpro (&Qdisplay_table); |
d67b4f80 | 6535 | Qredisplay_dont_pause = intern_c_string ("redisplay-dont-pause"); |
e7067d00 | 6536 | staticpro (&Qredisplay_dont_pause); |
9cda4f7c | 6537 | |
7ee72033 | 6538 | DEFVAR_INT ("baud-rate", &baud_rate, |
bacf09b4 | 6539 | doc: /* *The output baud rate of the terminal. |
228299fa GM |
6540 | On most systems, changing this value will affect the amount of padding |
6541 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 6542 | |
7ee72033 | 6543 | DEFVAR_BOOL ("inverse-video", &inverse_video, |
bacf09b4 | 6544 | doc: /* *Non-nil means invert the entire frame display. |
228299fa | 6545 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 6546 | |
7ee72033 | 6547 | DEFVAR_BOOL ("visible-bell", &visible_bell, |
bacf09b4 | 6548 | doc: /* *Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
6549 | |
6550 | See also `ring-bell-function'. */); | |
177c0ea7 | 6551 | |
7ee72033 | 6552 | DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter, |
bacf09b4 | 6553 | doc: /* *Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
6554 | A non-nil value is useful if the terminal can automatically preserve |
6555 | Emacs's frame display when you reenter Emacs. | |
6556 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 6557 | |
2246281f KL |
6558 | DEFVAR_LISP ("initial-window-system", &Vinitial_window_system, |
6559 | doc: /* Name of the window system that Emacs uses for the first frame. | |
85565e9e RS |
6560 | The value is a symbol--for instance, `x' for X windows. |
6561 | The value is nil if Emacs is using a text-only terminal. */); | |
177c0ea7 | 6562 | |
70b8d0a4 SM |
6563 | DEFVAR_KBOARD ("window-system", Vwindow_system, |
6564 | doc: /* Name of window system through which the selected frame is displayed. | |
6565 | The value is a symbol--for instance, `x' for X windows. | |
6566 | The value is nil if the selected frame is on a text-only-terminal. */); | |
6567 | ||
7ee72033 | 6568 | DEFVAR_LISP ("window-system-version", &Vwindow_system_version, |
bacf09b4 | 6569 | doc: /* The version number of the window system in use. |
c22140f6 | 6570 | For X windows, this is 11. */); |
177c0ea7 | 6571 | |
7ee72033 | 6572 | DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area, |
bacf09b4 | 6573 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 6574 | |
7ee72033 | 6575 | DEFVAR_LISP ("glyph-table", &Vglyph_table, |
bacf09b4 | 6576 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
6577 | If not nil, this is a vector indexed by glyph code to define the glyph. |
6578 | Each element can be: | |
6579 | integer: a glyph code which this glyph is an alias for. | |
6580 | string: output this glyph using that string (not impl. in X windows). | |
6581 | nil: this glyph mod 524288 is the code of a character to output, | |
6582 | and this glyph / 524288 is the face number (see `face-id') to use | |
6583 | while outputting it. */); | |
4588ec20 JB |
6584 | Vglyph_table = Qnil; |
6585 | ||
7ee72033 | 6586 | DEFVAR_LISP ("standard-display-table", &Vstandard_display_table, |
bacf09b4 | 6587 | doc: /* Display table to use for buffers that specify none. |
228299fa | 6588 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
6589 | Vstandard_display_table = Qnil; |
6590 | ||
7ee72033 | 6591 | DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause, |
bacf09b4 | 6592 | doc: /* *Non-nil means update isn't paused when input is detected. */); |
5f5c8ee5 GM |
6593 | redisplay_dont_pause = 0; |
6594 | ||
d012c62b KS |
6595 | #if PERIODIC_PREEMPTION_CHECKING |
6596 | DEFVAR_LISP ("redisplay-preemption-period", &Vredisplay_preemption_period, | |
6597 | doc: /* *The period in seconds between checking for input during redisplay. | |
6598 | If input is detected, redisplay is pre-empted, and the input is processed. | |
6599 | If nil, never pre-empt redisplay. */); | |
6600 | Vredisplay_preemption_period = make_float (0.10); | |
6601 | #endif | |
6602 | ||
4588ec20 JB |
6603 | #ifdef CANNOT_DUMP |
6604 | if (noninteractive) | |
6605 | #endif | |
6606 | { | |
2246281f | 6607 | Vinitial_window_system = Qnil; |
4588ec20 JB |
6608 | Vwindow_system_version = Qnil; |
6609 | } | |
6610 | } | |
6b61353c KH |
6611 | |
6612 | /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413 | |
6613 | (do not change this comment) */ |