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 | ||
4588ec20 | 69 | /* Get number of chars of output now in the buffer of a stdio stream. |
5f5c8ee5 GM |
70 | This ought to be built in in stdio, but it isn't. Some s- files |
71 | override this because their stdio internals differ. */ | |
72 | ||
e3271ae5 | 73 | #ifdef __GNU_LIBRARY__ |
5f5c8ee5 GM |
74 | |
75 | /* The s- file might have overridden the definition with one that | |
76 | works for the system's C library. But we are using the GNU C | |
77 | library, so this is the right definition for every system. */ | |
78 | ||
3883a901 RS |
79 | #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT |
80 | #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT | |
81 | #else | |
cb5558ff | 82 | #undef PENDING_OUTPUT_COUNT |
e3271ae5 | 83 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer) |
3883a901 RS |
84 | #endif |
85 | #else /* not __GNU_LIBRARY__ */ | |
68c45bf0 PE |
86 | #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING |
87 | #include <stdio_ext.h> | |
88 | #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE) | |
89 | #endif | |
cb5558ff | 90 | #ifndef PENDING_OUTPUT_COUNT |
4588ec20 JB |
91 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) |
92 | #endif | |
5f5c8ee5 GM |
93 | #endif /* not __GNU_LIBRARY__ */ |
94 | ||
8a2a6032 | 95 | #if defined(HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES) |
fa0ec9f4 DL |
96 | #include <term.h> /* for tgetent */ |
97 | #endif | |
5f5c8ee5 GM |
98 | \f |
99 | /* Structure to pass dimensions around. Used for character bounding | |
100 | boxes, glyph matrix dimensions and alike. */ | |
101 | ||
102 | struct dim | |
103 | { | |
104 | int width; | |
105 | int height; | |
106 | }; | |
107 | ||
108 | \f | |
109 | /* Function prototypes. */ | |
110 | ||
f57e2426 J |
111 | static struct glyph_matrix *save_current_matrix (struct frame *); |
112 | static void restore_current_matrix (struct frame *, struct glyph_matrix *); | |
113 | static int showing_window_margins_p (struct window *); | |
114 | static void fake_current_matrices (Lisp_Object); | |
115 | static void redraw_overlapping_rows (struct window *, int); | |
116 | static void redraw_overlapped_rows (struct window *, int); | |
117 | static int count_blanks (struct glyph *, int); | |
118 | static int count_match (struct glyph *, struct glyph *, | |
119 | struct glyph *, struct glyph *); | |
120 | static unsigned line_draw_cost (struct glyph_matrix *, int); | |
121 | static void update_frame_line (struct frame *, int); | |
5f5c8ee5 | 122 | static struct dim allocate_matrices_for_frame_redisplay |
f57e2426 J |
123 | (Lisp_Object, int, int, int, int *); |
124 | static void allocate_matrices_for_window_redisplay (struct window *); | |
125 | static int realloc_glyph_pool (struct glyph_pool *, struct dim); | |
126 | static void adjust_frame_glyphs (struct frame *); | |
127 | struct glyph_matrix *new_glyph_matrix (struct glyph_pool *); | |
128 | static void free_glyph_matrix (struct glyph_matrix *); | |
129 | static void adjust_glyph_matrix (struct window *, struct glyph_matrix *, | |
130 | int, int, struct dim); | |
131 | static void change_frame_size_1 (struct frame *, int, int, int, int, int); | |
132 | static void swap_glyph_pointers (struct glyph_row *, struct glyph_row *); | |
f1d2ce7f | 133 | #if GLYPH_DEBUG |
f57e2426 | 134 | static int glyph_row_slice_p (struct glyph_row *, struct glyph_row *); |
9339e87f | 135 | #endif |
f57e2426 J |
136 | static void fill_up_frame_row_with_spaces (struct glyph_row *, int); |
137 | static void build_frame_matrix_from_window_tree (struct glyph_matrix *, | |
138 | struct window *); | |
139 | static void build_frame_matrix_from_leaf_window (struct glyph_matrix *, | |
140 | struct window *); | |
141 | static struct glyph_pool *new_glyph_pool (void); | |
142 | static void free_glyph_pool (struct glyph_pool *); | |
143 | static void adjust_frame_glyphs_initially (void); | |
144 | static void adjust_frame_message_buffer (struct frame *); | |
145 | static void adjust_decode_mode_spec_buffer (struct frame *); | |
146 | static void fill_up_glyph_row_with_spaces (struct glyph_row *); | |
147 | static void build_frame_matrix (struct frame *); | |
148 | void clear_current_matrices (struct frame *); | |
149 | void scroll_glyph_matrix_range (struct glyph_matrix *, int, int, | |
150 | int, int); | |
151 | static void clear_window_matrices (struct window *, int); | |
152 | static void fill_up_glyph_row_area_with_spaces (struct glyph_row *, int); | |
153 | static int scrolling_window (struct window *, int); | |
154 | static int update_window_line (struct window *, int, int *); | |
155 | static void update_marginal_area (struct window *, int, int); | |
156 | static int update_text_area (struct window *, int); | |
157 | static void make_current (struct glyph_matrix *, struct glyph_matrix *, | |
158 | int); | |
159 | static void mirror_make_current (struct window *, int); | |
160 | void check_window_matrix_pointers (struct window *); | |
b96fd3e8 | 161 | #if GLYPH_DEBUG |
f57e2426 J |
162 | static void check_matrix_pointers (struct glyph_matrix *, |
163 | struct glyph_matrix *); | |
b96fd3e8 | 164 | #endif |
f57e2426 J |
165 | static void mirror_line_dance (struct window *, int, int, int *, char *); |
166 | static int update_window_tree (struct window *, int); | |
167 | static int update_window (struct window *, int); | |
168 | static int update_frame_1 (struct frame *, int, int); | |
169 | static void set_window_cursor_after_update (struct window *); | |
170 | static int row_equal_p (struct window *, struct glyph_row *, | |
171 | struct glyph_row *, int); | |
172 | static void adjust_frame_glyphs_for_window_redisplay (struct frame *); | |
173 | static void adjust_frame_glyphs_for_frame_redisplay (struct frame *); | |
174 | static void reverse_rows (struct glyph_matrix *, int, int); | |
175 | static int margin_glyphs_to_reserve (struct window *, int, Lisp_Object); | |
176 | static void sync_window_with_frame_matrix_rows (struct window *); | |
177 | struct window *frame_row_to_window (struct window *, int); | |
5f5c8ee5 | 178 | |
5f5c8ee5 GM |
179 | \f |
180 | /* Non-zero means don't pause redisplay for pending input. (This is | |
181 | for debugging and for a future implementation of EDT-like | |
182 | scrolling. */ | |
4588ec20 | 183 | |
5f5c8ee5 | 184 | int redisplay_dont_pause; |
45140e01 | 185 | |
d012c62b KS |
186 | /* Define PERIODIC_PREEMPTION_CHECKING to 1, if micro-second timers |
187 | are supported, so we can check for input during redisplay at | |
188 | regular intervals. */ | |
189 | #ifdef EMACS_HAS_USECS | |
190 | #define PERIODIC_PREEMPTION_CHECKING 1 | |
191 | #else | |
192 | #define PERIODIC_PREEMPTION_CHECKING 0 | |
193 | #endif | |
194 | ||
195 | #if PERIODIC_PREEMPTION_CHECKING | |
196 | ||
197 | /* If a number (float), check for user input every N seconds. */ | |
198 | ||
199 | Lisp_Object Vredisplay_preemption_period; | |
200 | ||
201 | /* Redisplay preemption timers. */ | |
202 | ||
203 | static EMACS_TIME preemption_period; | |
204 | static EMACS_TIME preemption_next_check; | |
205 | ||
206 | #endif | |
207 | ||
a41f8bed | 208 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 209 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 210 | |
502b9b64 | 211 | int frame_garbaged; |
4588ec20 | 212 | |
5f5c8ee5 | 213 | /* Nonzero means last display completed. Zero means it was preempted. */ |
4588ec20 JB |
214 | |
215 | int display_completed; | |
216 | ||
5f5c8ee5 GM |
217 | /* Lisp variable visible-bell; enables use of screen-flash instead of |
218 | audible bell. */ | |
4588ec20 JB |
219 | |
220 | int visible_bell; | |
221 | ||
502b9b64 | 222 | /* Invert the color of the whole frame, at a low level. */ |
4588ec20 JB |
223 | |
224 | int inverse_video; | |
225 | ||
226 | /* Line speed of the terminal. */ | |
227 | ||
31ade731 | 228 | EMACS_INT baud_rate; |
4588ec20 | 229 | |
5f5c8ee5 | 230 | /* Either nil or a symbol naming the window system under which Emacs |
2246281f | 231 | creates the first frame. */ |
4588ec20 | 232 | |
2246281f | 233 | Lisp_Object Vinitial_window_system; |
4588ec20 JB |
234 | |
235 | /* Version number of X windows: 10, 11 or nil. */ | |
5f5c8ee5 | 236 | |
4588ec20 JB |
237 | Lisp_Object Vwindow_system_version; |
238 | ||
5f5c8ee5 GM |
239 | /* Vector of glyph definitions. Indexed by glyph number, the contents |
240 | are a string which is how to output the glyph. | |
4588ec20 JB |
241 | |
242 | If Vglyph_table is nil, a glyph is output by using its low 8 bits | |
5f5c8ee5 GM |
243 | as a character code. |
244 | ||
245 | This is an obsolete feature that is no longer used. The variable | |
246 | is retained for compatibility. */ | |
4588ec20 JB |
247 | |
248 | Lisp_Object Vglyph_table; | |
249 | ||
250 | /* Display table to use for vectors that don't specify their own. */ | |
251 | ||
252 | Lisp_Object Vstandard_display_table; | |
253 | ||
5f5c8ee5 | 254 | /* Nonzero means reading single-character input with prompt so put |
153a073c | 255 | cursor on mini-buffer after the prompt. Positive means at end of |
5f5c8ee5 GM |
256 | text in echo area; negative means at beginning of line. */ |
257 | ||
4588ec20 | 258 | int cursor_in_echo_area; |
9cda4f7c | 259 | |
e7067d00 | 260 | Lisp_Object Qdisplay_table, Qredisplay_dont_pause; |
5f5c8ee5 | 261 | |
4588ec20 | 262 | \f |
5f5c8ee5 | 263 | /* The currently selected frame. In a single-frame version, this |
91fb7e1b | 264 | variable always equals the_only_frame. */ |
4588ec20 | 265 | |
91fb7e1b | 266 | Lisp_Object selected_frame; |
4588ec20 | 267 | |
5f5c8ee5 | 268 | /* A frame which is not just a mini-buffer, or 0 if there are no such |
502b9b64 | 269 | frames. This is usually the most recent such frame that was |
87485d6f MW |
270 | selected. In a single-frame version, this variable always holds |
271 | the address of the_only_frame. */ | |
4588ec20 | 272 | |
5f5c8ee5 | 273 | struct frame *last_nonminibuf_frame; |
d52bad65 | 274 | |
5f5c8ee5 | 275 | /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 276 | |
5f5c8ee5 | 277 | int delayed_size_change; |
4588ec20 | 278 | |
5f5c8ee5 | 279 | /* 1 means glyph initialization has been completed at startup. */ |
4588ec20 | 280 | |
5f5c8ee5 | 281 | static int glyphs_initialized_initially_p; |
4588ec20 | 282 | |
5f5c8ee5 | 283 | /* Updated window if != 0. Set by update_window. */ |
4588ec20 | 284 | |
5f5c8ee5 | 285 | struct window *updated_window; |
4588ec20 | 286 | |
5f5c8ee5 | 287 | /* Glyph row updated in update_window_line, and area that is updated. */ |
4588ec20 | 288 | |
5f5c8ee5 GM |
289 | struct glyph_row *updated_row; |
290 | int updated_area; | |
4588ec20 | 291 | |
5f5c8ee5 | 292 | /* A glyph for a space. */ |
4588ec20 | 293 | |
5f5c8ee5 | 294 | struct glyph space_glyph; |
4588ec20 | 295 | |
5f5c8ee5 GM |
296 | /* Counts of allocated structures. These counts serve to diagnose |
297 | memory leaks and double frees. */ | |
4588ec20 | 298 | |
5f5c8ee5 GM |
299 | int glyph_matrix_count; |
300 | int glyph_pool_count; | |
4588ec20 | 301 | |
5f5c8ee5 GM |
302 | /* If non-null, the frame whose frame matrices are manipulated. If |
303 | null, window matrices are worked on. */ | |
4588ec20 | 304 | |
5f5c8ee5 | 305 | static struct frame *frame_matrix_frame; |
4588ec20 | 306 | |
5f5c8ee5 GM |
307 | /* Non-zero means that fonts have been loaded since the last glyph |
308 | matrix adjustments. Redisplay must stop, and glyph matrices must | |
309 | be adjusted when this flag becomes non-zero during display. The | |
310 | reason fonts can be loaded so late is that fonts of fontsets are | |
3aa9f0c4 KH |
311 | loaded on demand. Another reason is that a line contains many |
312 | characters displayed by zero width or very narrow glyphs of | |
313 | variable-width fonts. */ | |
836d2cde | 314 | |
5f5c8ee5 | 315 | int fonts_changed_p; |
836d2cde | 316 | |
177c0ea7 | 317 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 318 | This may only be used for terminal frames. */ |
836d2cde | 319 | |
5f5c8ee5 | 320 | #if GLYPH_DEBUG |
4588ec20 | 321 | |
f57e2426 J |
322 | static int window_to_frame_vpos (struct window *, int); |
323 | static int window_to_frame_hpos (struct window *, int); | |
5f5c8ee5 GM |
324 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) |
325 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 326 | |
9b0e97aa GM |
327 | /* One element of the ring buffer containing redisplay history |
328 | information. */ | |
329 | ||
330 | struct redisplay_history | |
331 | { | |
332 | char trace[512 + 100]; | |
333 | }; | |
334 | ||
335 | /* The size of the history buffer. */ | |
336 | ||
337 | #define REDISPLAY_HISTORY_SIZE 30 | |
338 | ||
339 | /* The redisplay history buffer. */ | |
340 | ||
341 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
342 | ||
343 | /* Next free entry in redisplay_history. */ | |
344 | ||
345 | static int history_idx; | |
346 | ||
347 | /* A tick that's incremented each time something is added to the | |
348 | history. */ | |
349 | ||
350 | static unsigned history_tick; | |
351 | ||
f57e2426 J |
352 | static void add_frame_display_history (struct frame *, int); |
353 | static void add_window_display_history (struct window *, char *, int); | |
6a8aec41 | 354 | \f |
9b0e97aa GM |
355 | /* Add to the redisplay history how window W has been displayed. |
356 | MSG is a trace containing the information how W's glyph matrix | |
153a073c | 357 | has been constructed. PAUSED_P non-zero means that the update |
9b0e97aa GM |
358 | has been interrupted for pending input. */ |
359 | ||
360 | static void | |
361 | add_window_display_history (w, msg, paused_p) | |
362 | struct window *w; | |
363 | char *msg; | |
364 | int paused_p; | |
365 | { | |
366 | char *buf; | |
177c0ea7 | 367 | |
9b0e97aa GM |
368 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
369 | history_idx = 0; | |
370 | buf = redisplay_history[history_idx].trace; | |
371 | ++history_idx; | |
177c0ea7 | 372 | |
9b0e97aa GM |
373 | sprintf (buf, "%d: window %p (`%s')%s\n", |
374 | history_tick++, | |
375 | w, | |
376 | ((BUFFERP (w->buffer) | |
377 | && STRINGP (XBUFFER (w->buffer)->name)) | |
d5db4077 | 378 | ? (char *) SDATA (XBUFFER (w->buffer)->name) |
9b0e97aa GM |
379 | : "???"), |
380 | paused_p ? " ***paused***" : ""); | |
381 | strcat (buf, msg); | |
382 | } | |
383 | ||
384 | ||
385 | /* Add to the redisplay history that frame F has been displayed. | |
386 | PAUSED_P non-zero means that the update has been interrupted for | |
387 | pending input. */ | |
388 | ||
389 | static void | |
390 | add_frame_display_history (f, paused_p) | |
391 | struct frame *f; | |
392 | int paused_p; | |
393 | { | |
394 | char *buf; | |
177c0ea7 | 395 | |
9b0e97aa GM |
396 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
397 | history_idx = 0; | |
398 | buf = redisplay_history[history_idx].trace; | |
399 | ++history_idx; | |
177c0ea7 | 400 | |
9b0e97aa GM |
401 | sprintf (buf, "%d: update frame %p%s", |
402 | history_tick++, | |
403 | f, paused_p ? " ***paused***" : ""); | |
404 | } | |
405 | ||
406 | ||
407 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, | |
408 | Sdump_redisplay_history, 0, 0, "", | |
7ee72033 | 409 | doc: /* Dump redisplay history to stderr. */) |
5842a27b | 410 | (void) |
9b0e97aa GM |
411 | { |
412 | int i; | |
413 | ||
414 | for (i = history_idx - 1; i != history_idx; --i) | |
415 | { | |
416 | if (i < 0) | |
417 | i = REDISPLAY_HISTORY_SIZE - 1; | |
418 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
419 | } | |
420 | ||
421 | return Qnil; | |
422 | } | |
423 | ||
424 | ||
5f5c8ee5 | 425 | #else /* GLYPH_DEBUG == 0 */ |
4588ec20 | 426 | |
7df02016 KS |
427 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
428 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 429 | |
5f5c8ee5 | 430 | #endif /* GLYPH_DEBUG == 0 */ |
4588ec20 | 431 | |
4588ec20 | 432 | |
dcc19aac | 433 | #if defined PROFILING && !HAVE___EXECUTABLE_START |
72af86bd | 434 | /* FIXME: only used to find text start for profiling. */ |
4588ec20 JB |
435 | |
436 | void | |
971de7fb | 437 | safe_bcopy (const char *from, char *to, int size) |
4588ec20 | 438 | { |
72af86bd | 439 | abort (); |
177c0ea7 | 440 | } |
72af86bd | 441 | #endif |
5f5c8ee5 GM |
442 | \f |
443 | /*********************************************************************** | |
444 | Glyph Matrices | |
445 | ***********************************************************************/ | |
446 | ||
447 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
448 | pool from which memory for the matrix should be allocated, or null | |
449 | for window-based redisplay where no glyph pools are used. The | |
450 | member `pool' of the glyph matrix structure returned is set to | |
451 | POOL, the structure is otherwise zeroed. */ | |
452 | ||
453 | struct glyph_matrix * | |
971de7fb | 454 | new_glyph_matrix (struct glyph_pool *pool) |
4588ec20 | 455 | { |
5f5c8ee5 GM |
456 | struct glyph_matrix *result; |
457 | ||
458 | /* Allocate and clear. */ | |
459 | result = (struct glyph_matrix *) xmalloc (sizeof *result); | |
72af86bd | 460 | memset (result, 0, sizeof *result); |
4588ec20 | 461 | |
5f5c8ee5 GM |
462 | /* Increment number of allocated matrices. This count is used |
463 | to detect memory leaks. */ | |
464 | ++glyph_matrix_count; | |
4588ec20 | 465 | |
5f5c8ee5 GM |
466 | /* Set pool and return. */ |
467 | result->pool = pool; | |
468 | return result; | |
4588ec20 JB |
469 | } |
470 | ||
4588ec20 | 471 | |
5f5c8ee5 GM |
472 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
473 | ||
474 | The global counter glyph_matrix_count is decremented when a matrix | |
475 | is freed. If the count gets negative, more structures were freed | |
476 | than allocated, i.e. one matrix was freed more than once or a bogus | |
477 | pointer was passed to this function. | |
177c0ea7 | 478 | |
5f5c8ee5 GM |
479 | If MATRIX->pool is null, this means that the matrix manages its own |
480 | glyph memory---this is done for matrices on X frames. Freeing the | |
481 | matrix also frees the glyph memory in this case. */ | |
482 | ||
483 | static void | |
971de7fb | 484 | free_glyph_matrix (struct glyph_matrix *matrix) |
4588ec20 | 485 | { |
5f5c8ee5 GM |
486 | if (matrix) |
487 | { | |
488 | int i; | |
489 | ||
490 | /* Detect the case that more matrices are freed than were | |
491 | allocated. */ | |
492 | if (--glyph_matrix_count < 0) | |
493 | abort (); | |
494 | ||
495 | /* Free glyph memory if MATRIX owns it. */ | |
496 | if (matrix->pool == NULL) | |
497 | for (i = 0; i < matrix->rows_allocated; ++i) | |
498 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 499 | |
5f5c8ee5 GM |
500 | /* Free row structures and the matrix itself. */ |
501 | xfree (matrix->rows); | |
502 | xfree (matrix); | |
503 | } | |
504 | } | |
4588ec20 | 505 | |
4588ec20 | 506 | |
5f5c8ee5 GM |
507 | /* Return the number of glyphs to reserve for a marginal area of |
508 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
509 | display line of window W. MARGIN gives the width of the marginal | |
510 | area in canonical character units. MARGIN should be an integer | |
511 | or a float. */ | |
512 | ||
513 | static int | |
971de7fb | 514 | margin_glyphs_to_reserve (struct window *w, int total_glyphs, Lisp_Object margin) |
5f5c8ee5 GM |
515 | { |
516 | int n; | |
4588ec20 | 517 | |
5f5c8ee5 | 518 | if (NUMBERP (margin)) |
4588ec20 | 519 | { |
7df02016 | 520 | int width = XFASTINT (w->total_cols); |
5f5c8ee5 GM |
521 | double d = max (0, XFLOATINT (margin)); |
522 | d = min (width / 2 - 1, d); | |
35ec832e | 523 | n = (int) ((double) total_glyphs / width * d); |
5f5c8ee5 GM |
524 | } |
525 | else | |
526 | n = 0; | |
527 | ||
528 | return n; | |
529 | } | |
530 | ||
4588ec20 | 531 | |
5f5c8ee5 GM |
532 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
533 | window sizes. | |
4588ec20 | 534 | |
5f5c8ee5 GM |
535 | W is null if the function is called for a frame glyph matrix. |
536 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
537 | indices of the first column and row of MATRIX within the frame | |
538 | matrix, if such a matrix exists. They are zero for purely | |
539 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 540 | |
5f5c8ee5 GM |
541 | In window-based redisplay, where no frame matrices exist, glyph |
542 | matrices manage their own glyph storage. Otherwise, they allocate | |
543 | storage from a common frame glyph pool which can be found in | |
544 | MATRIX->pool. | |
23b0200c | 545 | |
5f5c8ee5 GM |
546 | The reason for this memory management strategy is to avoid complete |
547 | frame redraws if possible. When we allocate from a common pool, a | |
548 | change of the location or size of a sub-matrix within the pool | |
549 | requires a complete redisplay of the frame because we cannot easily | |
550 | make sure that the current matrices of all windows still agree with | |
551 | what is displayed on the screen. While this is usually fast, it | |
552 | leads to screen flickering. */ | |
23b0200c | 553 | |
5f5c8ee5 | 554 | static void |
971de7fb | 555 | adjust_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int x, int y, struct dim dim) |
5f5c8ee5 GM |
556 | { |
557 | int i; | |
558 | int new_rows; | |
559 | int marginal_areas_changed_p = 0; | |
045dee35 GM |
560 | int header_line_changed_p = 0; |
561 | int header_line_p = 0; | |
5f5c8ee5 | 562 | int left = -1, right = -1; |
ca8a12a7 | 563 | int window_width = -1, window_height = -1; |
5f5c8ee5 | 564 | |
6b61353c KH |
565 | /* See if W had a header line that has disappeared now, or vice versa. |
566 | Get W's size. */ | |
5f5c8ee5 GM |
567 | if (w) |
568 | { | |
6b61353c KH |
569 | window_box (w, -1, 0, 0, &window_width, &window_height); |
570 | ||
045dee35 GM |
571 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
572 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 573 | } |
045dee35 | 574 | matrix->header_line_p = header_line_p; |
23b0200c | 575 | |
6b61353c KH |
576 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
577 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
578 | haven't changed. This optimization is important because preserving |
579 | the matrix means preventing redisplay. */ | |
580 | if (matrix->pool == NULL) | |
581 | { | |
7df02016 KS |
582 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
583 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
5f5c8ee5 GM |
584 | xassert (left >= 0 && right >= 0); |
585 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs | |
586 | || right != matrix->right_margin_glyphs); | |
587 | ||
588 | if (!marginal_areas_changed_p | |
589 | && !fonts_changed_p | |
045dee35 | 590 | && !header_line_changed_p |
7df02016 KS |
591 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
592 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
593 | && matrix->window_height == window_height |
594 | && matrix->window_vscroll == w->vscroll | |
595 | && matrix->window_width == window_width) | |
596 | return; | |
597 | } | |
177c0ea7 | 598 | |
5f5c8ee5 GM |
599 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
600 | if (matrix->rows_allocated < dim.height) | |
601 | { | |
602 | int size = dim.height * sizeof (struct glyph_row); | |
603 | new_rows = dim.height - matrix->rows_allocated; | |
604 | matrix->rows = (struct glyph_row *) xrealloc (matrix->rows, size); | |
72af86bd AS |
605 | memset (matrix->rows + matrix->rows_allocated, 0, |
606 | new_rows * sizeof *matrix->rows); | |
5f5c8ee5 GM |
607 | matrix->rows_allocated = dim.height; |
608 | } | |
609 | else | |
610 | new_rows = 0; | |
60a8948a | 611 | |
5f5c8ee5 GM |
612 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
613 | on a frame not using window-based redisplay. Set up pointers for | |
614 | each row into the glyph pool. */ | |
615 | if (matrix->pool) | |
616 | { | |
617 | xassert (matrix->pool->glyphs); | |
177c0ea7 | 618 | |
5f5c8ee5 | 619 | if (w) |
60a8948a | 620 | { |
5f5c8ee5 | 621 | left = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 622 | w->left_margin_cols); |
5f5c8ee5 | 623 | right = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 624 | w->right_margin_cols); |
60a8948a | 625 | } |
5f5c8ee5 GM |
626 | else |
627 | left = right = 0; | |
177c0ea7 | 628 | |
5f5c8ee5 | 629 | for (i = 0; i < dim.height; ++i) |
60a8948a | 630 | { |
5f5c8ee5 | 631 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
632 | |
633 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
634 | = (matrix->pool->glyphs |
635 | + (y + i) * matrix->pool->ncolumns | |
636 | + x); | |
177c0ea7 | 637 | |
5f5c8ee5 GM |
638 | if (w == NULL |
639 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 640 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
641 | { |
642 | row->glyphs[TEXT_AREA] | |
643 | = row->glyphs[LEFT_MARGIN_AREA]; | |
644 | row->glyphs[RIGHT_MARGIN_AREA] | |
645 | = row->glyphs[TEXT_AREA] + dim.width; | |
646 | row->glyphs[LAST_AREA] | |
647 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
648 | } | |
649 | else | |
650 | { | |
651 | row->glyphs[TEXT_AREA] | |
652 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
653 | row->glyphs[RIGHT_MARGIN_AREA] | |
654 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
655 | row->glyphs[LAST_AREA] | |
656 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
657 | } | |
60a8948a | 658 | } |
177c0ea7 | 659 | |
5f5c8ee5 GM |
660 | matrix->left_margin_glyphs = left; |
661 | matrix->right_margin_glyphs = right; | |
662 | } | |
663 | else | |
664 | { | |
665 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
6b61353c KH |
666 | its own memory. It is a window matrix for window-based redisplay. |
667 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
668 | if (dim.width > matrix->matrix_w |
669 | || new_rows | |
045dee35 | 670 | || header_line_changed_p |
5f5c8ee5 | 671 | || marginal_areas_changed_p) |
4588ec20 | 672 | { |
5f5c8ee5 GM |
673 | struct glyph_row *row = matrix->rows; |
674 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 675 | |
5f5c8ee5 GM |
676 | while (row < end) |
677 | { | |
678 | row->glyphs[LEFT_MARGIN_AREA] | |
679 | = (struct glyph *) xrealloc (row->glyphs[LEFT_MARGIN_AREA], | |
680 | (dim.width | |
681 | * sizeof (struct glyph))); | |
177c0ea7 | 682 | |
5f5c8ee5 GM |
683 | /* The mode line never has marginal areas. */ |
684 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 685 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
686 | { |
687 | row->glyphs[TEXT_AREA] | |
688 | = row->glyphs[LEFT_MARGIN_AREA]; | |
689 | row->glyphs[RIGHT_MARGIN_AREA] | |
690 | = row->glyphs[TEXT_AREA] + dim.width; | |
691 | row->glyphs[LAST_AREA] | |
692 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
693 | } | |
694 | else | |
695 | { | |
696 | row->glyphs[TEXT_AREA] | |
697 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
698 | row->glyphs[RIGHT_MARGIN_AREA] | |
699 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
700 | row->glyphs[LAST_AREA] | |
701 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
702 | } | |
703 | ++row; | |
704 | } | |
4588ec20 JB |
705 | } |
706 | ||
5f5c8ee5 GM |
707 | xassert (left >= 0 && right >= 0); |
708 | matrix->left_margin_glyphs = left; | |
709 | matrix->right_margin_glyphs = right; | |
710 | } | |
177c0ea7 | 711 | |
5f5c8ee5 GM |
712 | /* Number of rows to be used by MATRIX. */ |
713 | matrix->nrows = dim.height; | |
3ed36514 | 714 | xassert (matrix->nrows >= 0); |
5f5c8ee5 | 715 | |
b7b20fbd | 716 | if (w) |
5f5c8ee5 | 717 | { |
b7b20fbd | 718 | if (matrix == w->current_matrix) |
4588ec20 | 719 | { |
b7b20fbd GM |
720 | /* Mark rows in a current matrix of a window as not having |
721 | valid contents. It's important to not do this for | |
722 | desired matrices. When Emacs starts, it may already be | |
723 | building desired matrices when this function runs. */ | |
724 | if (window_width < 0) | |
725 | window_width = window_box_width (w, -1); | |
177c0ea7 | 726 | |
b7b20fbd GM |
727 | /* Optimize the case that only the height has changed (C-x 2, |
728 | upper window). Invalidate all rows that are no longer part | |
729 | of the window. */ | |
730 | if (!marginal_areas_changed_p | |
73d75a62 GM |
731 | && !header_line_changed_p |
732 | && new_rows == 0 | |
733 | && dim.width == matrix->matrix_w | |
7df02016 KS |
734 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
735 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 736 | && matrix->window_width == window_width) |
b7b20fbd | 737 | { |
dd42b31a GM |
738 | /* Find the last row in the window. */ |
739 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
740 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
741 | { | |
26447967 | 742 | ++i; |
dd42b31a GM |
743 | break; |
744 | } | |
b7b20fbd GM |
745 | |
746 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 747 | are invalidated below. */ |
b7b20fbd GM |
748 | if (INTEGERP (w->window_end_vpos) |
749 | && XFASTINT (w->window_end_vpos) >= i) | |
750 | w->window_end_valid = Qnil; | |
177c0ea7 | 751 | |
b7b20fbd GM |
752 | while (i < matrix->nrows) |
753 | matrix->rows[i++].enabled_p = 0; | |
754 | } | |
755 | else | |
756 | { | |
757 | for (i = 0; i < matrix->nrows; ++i) | |
758 | matrix->rows[i].enabled_p = 0; | |
759 | } | |
5f5c8ee5 | 760 | } |
b7b20fbd | 761 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 762 | { |
b7b20fbd GM |
763 | /* Rows in desired matrices always have to be cleared; |
764 | redisplay expects this is the case when it runs, so it | |
765 | had better be the case when we adjust matrices between | |
766 | redisplays. */ | |
5f5c8ee5 GM |
767 | for (i = 0; i < matrix->nrows; ++i) |
768 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 769 | } |
4588ec20 | 770 | } |
177c0ea7 JB |
771 | |
772 | ||
5f5c8ee5 GM |
773 | /* Remember last values to be able to optimize frame redraws. */ |
774 | matrix->matrix_x = x; | |
775 | matrix->matrix_y = y; | |
776 | matrix->matrix_w = dim.width; | |
777 | matrix->matrix_h = dim.height; | |
778 | ||
779 | /* Record the top y location and height of W at the time the matrix | |
780 | was last adjusted. This is used to optimize redisplay above. */ | |
781 | if (w) | |
4588ec20 | 782 | { |
7df02016 KS |
783 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
784 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
785 | matrix->window_height = window_height; |
786 | matrix->window_width = window_width; | |
787 | matrix->window_vscroll = w->vscroll; | |
788 | } | |
789 | } | |
4588ec20 | 790 | |
4588ec20 | 791 | |
5f5c8ee5 GM |
792 | /* Reverse the contents of rows in MATRIX between START and END. The |
793 | contents of the row at END - 1 end up at START, END - 2 at START + | |
794 | 1 etc. This is part of the implementation of rotate_matrix (see | |
795 | below). */ | |
d52bad65 | 796 | |
5f5c8ee5 | 797 | static void |
971de7fb | 798 | reverse_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 GM |
799 | { |
800 | int i, j; | |
23b0200c | 801 | |
5f5c8ee5 GM |
802 | for (i = start, j = end - 1; i < j; ++i, --j) |
803 | { | |
804 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
805 | initialization. */ | |
806 | struct glyph_row temp; | |
807 | temp = matrix->rows[i]; | |
808 | matrix->rows[i] = matrix->rows[j]; | |
809 | matrix->rows[j] = temp; | |
810 | } | |
811 | } | |
23b0200c | 812 | |
23b0200c | 813 | |
5f5c8ee5 GM |
814 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
815 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
816 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
817 | row structures are moved around). | |
60a8948a | 818 | |
5f5c8ee5 GM |
819 | The algorithm used for rotating the vector was, I believe, first |
820 | described by Kernighan. See the vector R as consisting of two | |
821 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
822 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
823 | and reverse the result to get (ArBr)r which is BA. Similar for | |
824 | rotating right. */ | |
825 | ||
826 | void | |
971de7fb | 827 | rotate_matrix (struct glyph_matrix *matrix, int first, int last, int by) |
5f5c8ee5 GM |
828 | { |
829 | if (by < 0) | |
830 | { | |
831 | /* Up (rotate left, i.e. towards lower indices). */ | |
832 | by = -by; | |
833 | reverse_rows (matrix, first, first + by); | |
834 | reverse_rows (matrix, first + by, last); | |
835 | reverse_rows (matrix, first, last); | |
836 | } | |
837 | else if (by > 0) | |
838 | { | |
839 | /* Down (rotate right, i.e. towards higher indices). */ | |
840 | reverse_rows (matrix, last - by, last); | |
841 | reverse_rows (matrix, first, last - by); | |
842 | reverse_rows (matrix, first, last); | |
843 | } | |
844 | } | |
845 | ||
846 | ||
847 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
848 | with indices START <= index < END. Increment positions by DELTA/ | |
849 | DELTA_BYTES. */ | |
850 | ||
851 | void | |
971de7fb | 852 | increment_matrix_positions (struct glyph_matrix *matrix, int start, int end, int delta, int delta_bytes) |
5f5c8ee5 GM |
853 | { |
854 | /* Check that START and END are reasonable values. */ | |
855 | xassert (start >= 0 && start <= matrix->nrows); | |
856 | xassert (end >= 0 && end <= matrix->nrows); | |
857 | xassert (start <= end); | |
858 | ||
859 | for (; start < end; ++start) | |
86c11ba1 | 860 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
861 | } |
862 | ||
863 | ||
864 | /* Enable a range of rows in glyph matrix MATRIX. START and END are | |
865 | the row indices of the first and last + 1 row to enable. If | |
866 | ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */ | |
867 | ||
868 | void | |
971de7fb | 869 | enable_glyph_matrix_rows (struct glyph_matrix *matrix, int start, int end, int enabled_p) |
5f5c8ee5 | 870 | { |
3ed36514 GM |
871 | xassert (start <= end); |
872 | xassert (start >= 0 && start < matrix->nrows); | |
873 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 874 | |
5f5c8ee5 GM |
875 | for (; start < end; ++start) |
876 | matrix->rows[start].enabled_p = enabled_p != 0; | |
877 | } | |
878 | ||
879 | ||
880 | /* Clear MATRIX. | |
881 | ||
882 | This empties all rows in MATRIX by setting the enabled_p flag for | |
883 | all rows of the matrix to zero. The function prepare_desired_row | |
884 | will eventually really clear a row when it sees one with a zero | |
885 | enabled_p flag. | |
886 | ||
887 | Resets update hints to defaults value. The only update hint | |
888 | currently present is the flag MATRIX->no_scrolling_p. */ | |
889 | ||
890 | void | |
971de7fb | 891 | clear_glyph_matrix (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
892 | { |
893 | if (matrix) | |
894 | { | |
895 | enable_glyph_matrix_rows (matrix, 0, matrix->nrows, 0); | |
896 | matrix->no_scrolling_p = 0; | |
897 | } | |
898 | } | |
177c0ea7 | 899 | |
5f5c8ee5 GM |
900 | |
901 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
902 | Increment y-positions in glyph rows between START and END by DY, | |
903 | and recompute their visible height. */ | |
904 | ||
905 | void | |
971de7fb | 906 | shift_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int start, int end, int dy) |
5f5c8ee5 GM |
907 | { |
908 | int min_y, max_y; | |
177c0ea7 | 909 | |
5f5c8ee5 GM |
910 | xassert (start <= end); |
911 | xassert (start >= 0 && start < matrix->nrows); | |
912 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 913 | |
7df02016 KS |
914 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
915 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 916 | |
5f5c8ee5 GM |
917 | for (; start < end; ++start) |
918 | { | |
919 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 920 | |
5f5c8ee5 | 921 | row->y += dy; |
d6c747a4 | 922 | row->visible_height = row->height; |
177c0ea7 | 923 | |
5f5c8ee5 | 924 | if (row->y < min_y) |
d6c747a4 GM |
925 | row->visible_height -= min_y - row->y; |
926 | if (row->y + row->height > max_y) | |
927 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
928 | } |
929 | } | |
930 | ||
931 | ||
932 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
933 | invalid is done by setting enabled_p to zero for all rows in a | |
934 | current matrix. */ | |
935 | ||
936 | void | |
971de7fb | 937 | clear_current_matrices (register struct frame *f) |
5f5c8ee5 GM |
938 | { |
939 | /* Clear frame current matrix, if we have one. */ | |
940 | if (f->current_matrix) | |
941 | clear_glyph_matrix (f->current_matrix); | |
942 | ||
943 | /* Clear the matrix of the menu bar window, if such a window exists. | |
944 | The menu bar window is currently used to display menus on X when | |
945 | no toolkit support is compiled in. */ | |
946 | if (WINDOWP (f->menu_bar_window)) | |
947 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
948 | ||
9ea173e8 GM |
949 | /* Clear the matrix of the tool-bar window, if any. */ |
950 | if (WINDOWP (f->tool_bar_window)) | |
951 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
5f5c8ee5 GM |
952 | |
953 | /* Clear current window matrices. */ | |
954 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
955 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); | |
956 | } | |
957 | ||
958 | ||
959 | /* Clear out all display lines of F for a coming redisplay. */ | |
960 | ||
961 | void | |
971de7fb | 962 | clear_desired_matrices (register struct frame *f) |
5f5c8ee5 GM |
963 | { |
964 | if (f->desired_matrix) | |
965 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 966 | |
5f5c8ee5 GM |
967 | if (WINDOWP (f->menu_bar_window)) |
968 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
969 | ||
9ea173e8 GM |
970 | if (WINDOWP (f->tool_bar_window)) |
971 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
5f5c8ee5 GM |
972 | |
973 | /* Do it for window matrices. */ | |
974 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
975 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
976 | } | |
977 | ||
978 | ||
979 | /* Clear matrices in window tree rooted in W. If DESIRED_P is | |
980 | non-zero clear desired matrices, otherwise clear current matrices. */ | |
981 | ||
982 | static void | |
971de7fb | 983 | clear_window_matrices (struct window *w, int desired_p) |
5f5c8ee5 GM |
984 | { |
985 | while (w) | |
986 | { | |
987 | if (!NILP (w->hchild)) | |
988 | { | |
989 | xassert (WINDOWP (w->hchild)); | |
990 | clear_window_matrices (XWINDOW (w->hchild), desired_p); | |
991 | } | |
992 | else if (!NILP (w->vchild)) | |
993 | { | |
994 | xassert (WINDOWP (w->vchild)); | |
995 | clear_window_matrices (XWINDOW (w->vchild), desired_p); | |
996 | } | |
997 | else | |
998 | { | |
999 | if (desired_p) | |
1000 | clear_glyph_matrix (w->desired_matrix); | |
1001 | else | |
1002 | { | |
1003 | clear_glyph_matrix (w->current_matrix); | |
1004 | w->window_end_valid = Qnil; | |
1005 | } | |
1006 | } | |
1007 | ||
1008 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
1009 | } | |
1010 | } | |
1011 | ||
1012 | ||
1013 | \f | |
1014 | /*********************************************************************** | |
1015 | Glyph Rows | |
1016 | ||
1017 | See dispextern.h for an overall explanation of glyph rows. | |
1018 | ***********************************************************************/ | |
1019 | ||
1020 | /* Clear glyph row ROW. Do it in a way that makes it robust against | |
1021 | changes in the glyph_row structure, i.e. addition or removal of | |
1022 | structure members. */ | |
1023 | ||
2cca872d KH |
1024 | static struct glyph_row null_row; |
1025 | ||
5f5c8ee5 | 1026 | void |
971de7fb | 1027 | clear_glyph_row (struct glyph_row *row) |
5f5c8ee5 GM |
1028 | { |
1029 | struct glyph *p[1 + LAST_AREA]; | |
5f5c8ee5 GM |
1030 | |
1031 | /* Save pointers. */ | |
1032 | p[LEFT_MARGIN_AREA] = row->glyphs[LEFT_MARGIN_AREA]; | |
1033 | p[TEXT_AREA] = row->glyphs[TEXT_AREA]; | |
1034 | p[RIGHT_MARGIN_AREA] = row->glyphs[RIGHT_MARGIN_AREA]; | |
1035 | p[LAST_AREA] = row->glyphs[LAST_AREA]; | |
1036 | ||
1037 | /* Clear. */ | |
1038 | *row = null_row; | |
1039 | ||
1040 | /* Restore pointers. */ | |
1041 | row->glyphs[LEFT_MARGIN_AREA] = p[LEFT_MARGIN_AREA]; | |
1042 | row->glyphs[TEXT_AREA] = p[TEXT_AREA]; | |
1043 | row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA]; | |
1044 | row->glyphs[LAST_AREA] = p[LAST_AREA]; | |
45560b1a GM |
1045 | |
1046 | #if 0 /* At some point, some bit-fields of struct glyph were not set, | |
1047 | which made glyphs unequal when compared with GLYPH_EQUAL_P. | |
1048 | Redisplay outputs such glyphs, and flickering effects were | |
1049 | the result. This also depended on the contents of memory | |
1050 | returned by xmalloc. If flickering happens again, activate | |
153a073c | 1051 | the code below. If the flickering is gone with that, chances |
45560b1a | 1052 | are that the flickering has the same reason as here. */ |
72af86bd | 1053 | memset (p[0], 0, (char *) p[LAST_AREA] - (char *) p[0]); |
45560b1a | 1054 | #endif |
5f5c8ee5 GM |
1055 | } |
1056 | ||
1057 | ||
1058 | /* Make ROW an empty, enabled row of canonical character height, | |
1059 | in window W starting at y-position Y. */ | |
1060 | ||
1061 | void | |
971de7fb | 1062 | blank_row (struct window *w, struct glyph_row *row, int y) |
5f5c8ee5 GM |
1063 | { |
1064 | int min_y, max_y; | |
177c0ea7 | 1065 | |
7df02016 KS |
1066 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
1067 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 1068 | |
5f5c8ee5 GM |
1069 | clear_glyph_row (row); |
1070 | row->y = y; | |
408f5064 | 1071 | row->ascent = row->phys_ascent = 0; |
7df02016 | 1072 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 1073 | row->visible_height = row->height; |
177c0ea7 | 1074 | |
5f5c8ee5 | 1075 | if (row->y < min_y) |
d6c747a4 GM |
1076 | row->visible_height -= min_y - row->y; |
1077 | if (row->y + row->height > max_y) | |
1078 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
1079 | |
1080 | row->enabled_p = 1; | |
1081 | } | |
1082 | ||
1083 | ||
1084 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
1085 | are the amounts by which to change positions. Note that the first | |
1086 | glyph of the text area of a row can have a buffer position even if | |
1087 | the used count of the text area is zero. Such rows display line | |
1088 | ends. */ | |
1089 | ||
1090 | void | |
971de7fb | 1091 | increment_row_positions (struct glyph_row *row, int delta, int delta_bytes) |
5f5c8ee5 GM |
1092 | { |
1093 | int area, i; | |
1094 | ||
1095 | /* Increment start and end positions. */ | |
1096 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
1097 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
1098 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
1099 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
d36fe237 EZ |
1100 | CHARPOS (row->start.pos) += delta; |
1101 | BYTEPOS (row->start.pos) += delta_bytes; | |
1102 | CHARPOS (row->end.pos) += delta; | |
1103 | BYTEPOS (row->end.pos) += delta_bytes; | |
5f5c8ee5 | 1104 | |
5cacdcfd KS |
1105 | if (!row->enabled_p) |
1106 | return; | |
1107 | ||
5f5c8ee5 GM |
1108 | /* Increment positions in glyphs. */ |
1109 | for (area = 0; area < LAST_AREA; ++area) | |
1110 | for (i = 0; i < row->used[area]; ++i) | |
1111 | if (BUFFERP (row->glyphs[area][i].object) | |
1112 | && row->glyphs[area][i].charpos > 0) | |
1113 | row->glyphs[area][i].charpos += delta; | |
1114 | ||
1115 | /* Capture the case of rows displaying a line end. */ | |
1116 | if (row->used[TEXT_AREA] == 0 | |
1117 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1118 | row->glyphs[TEXT_AREA]->charpos += delta; | |
1119 | } | |
1120 | ||
1121 | ||
9af3e742 | 1122 | #if 0 |
5f5c8ee5 GM |
1123 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
1124 | contents, i.e. glyph structure contents are exchanged between A and | |
1125 | B without changing glyph pointers in A and B. */ | |
1126 | ||
1127 | static void | |
1128 | swap_glyphs_in_rows (a, b) | |
1129 | struct glyph_row *a, *b; | |
1130 | { | |
1131 | int area; | |
1132 | ||
1133 | for (area = 0; area < LAST_AREA; ++area) | |
1134 | { | |
1135 | /* Number of glyphs to swap. */ | |
1136 | int max_used = max (a->used[area], b->used[area]); | |
1137 | ||
1138 | /* Start of glyphs in area of row A. */ | |
1139 | struct glyph *glyph_a = a->glyphs[area]; | |
1140 | ||
1141 | /* End + 1 of glyphs in area of row A. */ | |
1142 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
1143 | ||
1144 | /* Start of glyphs in area of row B. */ | |
1145 | struct glyph *glyph_b = b->glyphs[area]; | |
1146 | ||
1147 | while (glyph_a < glyph_a_end) | |
1148 | { | |
1149 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
1150 | initialization. */ | |
1151 | struct glyph temp; | |
1152 | temp = *glyph_a; | |
1153 | *glyph_a = *glyph_b; | |
1154 | *glyph_b = temp; | |
1155 | ++glyph_a; | |
1156 | ++glyph_b; | |
1157 | } | |
1158 | } | |
1159 | } | |
1160 | ||
9af3e742 | 1161 | #endif /* 0 */ |
5f5c8ee5 GM |
1162 | |
1163 | /* Exchange pointers to glyph memory between glyph rows A and B. */ | |
1164 | ||
1165 | static INLINE void | |
971de7fb | 1166 | swap_glyph_pointers (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1167 | { |
1168 | int i; | |
1169 | for (i = 0; i < LAST_AREA + 1; ++i) | |
1170 | { | |
1171 | struct glyph *temp = a->glyphs[i]; | |
1172 | a->glyphs[i] = b->glyphs[i]; | |
1173 | b->glyphs[i] = temp; | |
1174 | } | |
1175 | } | |
1176 | ||
1177 | ||
1178 | /* Copy glyph row structure FROM to glyph row structure TO, except | |
1179 | that glyph pointers in the structures are left unchanged. */ | |
1180 | ||
1181 | INLINE void | |
971de7fb | 1182 | copy_row_except_pointers (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1183 | { |
1184 | struct glyph *pointers[1 + LAST_AREA]; | |
1185 | ||
1186 | /* Save glyph pointers of TO. */ | |
72af86bd | 1187 | memcpy (pointers, to->glyphs, sizeof to->glyphs); |
5f5c8ee5 GM |
1188 | |
1189 | /* Do a structure assignment. */ | |
1190 | *to = *from; | |
1191 | ||
1192 | /* Restore original pointers of TO. */ | |
72af86bd | 1193 | memcpy (to->glyphs, pointers, sizeof to->glyphs); |
5f5c8ee5 GM |
1194 | } |
1195 | ||
1196 | ||
1197 | /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in | |
1198 | TO and FROM are left unchanged. Glyph contents are copied from the | |
1199 | glyph memory of FROM to the glyph memory of TO. Increment buffer | |
1200 | positions in row TO by DELTA/ DELTA_BYTES. */ | |
1201 | ||
1202 | void | |
971de7fb | 1203 | copy_glyph_row_contents (struct glyph_row *to, struct glyph_row *from, int delta, int delta_bytes) |
5f5c8ee5 GM |
1204 | { |
1205 | int area; | |
1206 | ||
1207 | /* This is like a structure assignment TO = FROM, except that | |
1208 | glyph pointers in the rows are left unchanged. */ | |
1209 | copy_row_except_pointers (to, from); | |
1210 | ||
1211 | /* Copy glyphs from FROM to TO. */ | |
1212 | for (area = 0; area < LAST_AREA; ++area) | |
1213 | if (from->used[area]) | |
72af86bd AS |
1214 | memcpy (to->glyphs[area], from->glyphs[area], |
1215 | from->used[area] * sizeof (struct glyph)); | |
5f5c8ee5 GM |
1216 | |
1217 | /* Increment buffer positions in TO by DELTA. */ | |
86c11ba1 | 1218 | increment_row_positions (to, delta, delta_bytes); |
5f5c8ee5 GM |
1219 | } |
1220 | ||
1221 | ||
1222 | /* Assign glyph row FROM to glyph row TO. This works like a structure | |
1223 | assignment TO = FROM, except that glyph pointers are not copied but | |
1224 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1225 | a memory leak. */ | |
1226 | ||
1227 | static INLINE void | |
971de7fb | 1228 | assign_row (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1229 | { |
1230 | swap_glyph_pointers (to, from); | |
1231 | copy_row_except_pointers (to, from); | |
1232 | } | |
1233 | ||
1234 | ||
1235 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1236 | a row in a window matrix, is a slice of the glyph memory of the | |
1237 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
1238 | is non-zero if the glyph memory of WINDOW_ROW is part of the glyph | |
1239 | memory of FRAME_ROW. */ | |
1240 | ||
2d5912c1 | 1241 | #if GLYPH_DEBUG |
9339e87f | 1242 | |
5f5c8ee5 GM |
1243 | static int |
1244 | glyph_row_slice_p (window_row, frame_row) | |
1245 | struct glyph_row *window_row, *frame_row; | |
1246 | { | |
1247 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1248 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1249 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1250 | ||
1251 | return (frame_glyph_start <= window_glyph_start | |
1252 | && window_glyph_start < frame_glyph_end); | |
1253 | } | |
1254 | ||
9339e87f | 1255 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1256 | |
9af3e742 GM |
1257 | #if 0 |
1258 | ||
5f5c8ee5 GM |
1259 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1260 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1261 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1262 | ||
1263 | static struct glyph_row * | |
1264 | find_glyph_row_slice (window_matrix, frame_matrix, row) | |
1265 | struct glyph_matrix *window_matrix, *frame_matrix; | |
1266 | int row; | |
1267 | { | |
1268 | int i; | |
1269 | ||
1270 | xassert (row >= 0 && row < frame_matrix->nrows); | |
1271 | ||
1272 | for (i = 0; i < window_matrix->nrows; ++i) | |
1273 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1274 | frame_matrix->rows + row)) | |
1275 | break; | |
1276 | ||
1277 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1278 | } | |
1279 | ||
9af3e742 | 1280 | #endif /* 0 */ |
5f5c8ee5 GM |
1281 | |
1282 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1283 | i.e. they are only marked as to be cleared by setting their | |
1284 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1285 | call to this function really clears it. */ | |
1286 | ||
1287 | void | |
971de7fb | 1288 | prepare_desired_row (struct glyph_row *row) |
5f5c8ee5 GM |
1289 | { |
1290 | if (!row->enabled_p) | |
1291 | { | |
5009f85e EZ |
1292 | unsigned rp = row->reversed_p; |
1293 | ||
5f5c8ee5 GM |
1294 | clear_glyph_row (row); |
1295 | row->enabled_p = 1; | |
5009f85e | 1296 | row->reversed_p = rp; |
5f5c8ee5 GM |
1297 | } |
1298 | } | |
1299 | ||
1300 | ||
1301 | /* Return a hash code for glyph row ROW. */ | |
1302 | ||
1303 | int | |
971de7fb | 1304 | line_hash_code (struct glyph_row *row) |
5f5c8ee5 GM |
1305 | { |
1306 | int hash = 0; | |
177c0ea7 | 1307 | |
5f5c8ee5 GM |
1308 | if (row->enabled_p) |
1309 | { | |
4cecaab8 MB |
1310 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1311 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1312 | ||
1313 | while (glyph < end) | |
1314 | { | |
1315 | int c = glyph->u.ch; | |
1316 | int face_id = glyph->face_id; | |
daf01701 | 1317 | if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
4cecaab8 MB |
1318 | c -= SPACEGLYPH; |
1319 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1320 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1321 | ++glyph; | |
1322 | } | |
5f5c8ee5 | 1323 | |
4cecaab8 MB |
1324 | if (hash == 0) |
1325 | hash = 1; | |
5f5c8ee5 GM |
1326 | } |
1327 | ||
1328 | return hash; | |
1329 | } | |
1330 | ||
1331 | ||
153a073c | 1332 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1333 | the number of characters in the line. If must_write_spaces is |
1334 | zero, leading and trailing spaces are ignored. */ | |
1335 | ||
1336 | static unsigned int | |
971de7fb | 1337 | line_draw_cost (struct glyph_matrix *matrix, int vpos) |
5f5c8ee5 GM |
1338 | { |
1339 | struct glyph_row *row = matrix->rows + vpos; | |
1340 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1341 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1342 | int len; | |
1343 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
1344 | int glyph_table_len = GLYPH_TABLE_LENGTH; | |
1345 | ||
1346 | /* Ignore trailing and leading spaces if we can. */ | |
daf01701 | 1347 | if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
5f5c8ee5 GM |
1348 | { |
1349 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1350 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1351 | --end; |
1352 | ||
177c0ea7 | 1353 | /* All blank line. */ |
5f5c8ee5 GM |
1354 | if (end == beg) |
1355 | return 0; | |
1356 | ||
1357 | /* Skip over leading spaces. */ | |
1358 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1359 | ++beg; | |
1360 | } | |
1361 | ||
1362 | /* If we don't have a glyph-table, each glyph is one character, | |
1363 | so return the number of glyphs. */ | |
1364 | if (glyph_table_base == 0) | |
1365 | len = end - beg; | |
1366 | else | |
1367 | { | |
1368 | /* Otherwise, scan the glyphs and accumulate their total length | |
1369 | in LEN. */ | |
1370 | len = 0; | |
1371 | while (beg < end) | |
1372 | { | |
3fc809e2 | 1373 | GLYPH g; |
177c0ea7 | 1374 | |
3fc809e2 KS |
1375 | SET_GLYPH_FROM_CHAR_GLYPH (g, *beg); |
1376 | ||
565b39a8 | 1377 | if (GLYPH_INVALID_P (g) |
42186983 | 1378 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) |
5f5c8ee5 GM |
1379 | len += 1; |
1380 | else | |
1381 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1382 | |
5f5c8ee5 GM |
1383 | ++beg; |
1384 | } | |
1385 | } | |
177c0ea7 | 1386 | |
5f5c8ee5 GM |
1387 | return len; |
1388 | } | |
1389 | ||
1390 | ||
1391 | /* Test two glyph rows A and B for equality. Value is non-zero if A | |
1392 | and B have equal contents. W is the window to which the glyphs | |
1393 | rows A and B belong. It is needed here to test for partial row | |
e4e0bee9 GM |
1394 | visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p |
1395 | flags of A and B, too. */ | |
5f5c8ee5 | 1396 | |
177c0ea7 | 1397 | static INLINE int |
971de7fb | 1398 | row_equal_p (struct window *w, struct glyph_row *a, struct glyph_row *b, int mouse_face_p) |
5f5c8ee5 GM |
1399 | { |
1400 | if (a == b) | |
1401 | return 1; | |
1402 | else if (a->hash != b->hash) | |
1403 | return 0; | |
1404 | else | |
1405 | { | |
1406 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1407 | int area; | |
1408 | ||
e4e0bee9 GM |
1409 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1410 | return 0; | |
1411 | ||
5f5c8ee5 GM |
1412 | /* Compare glyphs. */ |
1413 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1414 | { | |
1415 | if (a->used[area] != b->used[area]) | |
1416 | return 0; | |
177c0ea7 | 1417 | |
5f5c8ee5 GM |
1418 | a_glyph = a->glyphs[area]; |
1419 | a_end = a_glyph + a->used[area]; | |
1420 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1421 | |
5f5c8ee5 GM |
1422 | while (a_glyph < a_end |
1423 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1424 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1425 | |
5f5c8ee5 GM |
1426 | if (a_glyph != a_end) |
1427 | return 0; | |
1428 | } | |
1429 | ||
6b61353c KH |
1430 | if (a->fill_line_p != b->fill_line_p |
1431 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1432 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
1433 | || a->left_fringe_face_id != b->left_fringe_face_id | |
1434 | || a->right_fringe_bitmap != b->right_fringe_bitmap | |
1435 | || a->right_fringe_face_id != b->right_fringe_face_id | |
3d4a365f | 1436 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
6b61353c | 1437 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1438 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1439 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1440 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
918f4159 | 1441 | || a->reversed_p != b->reversed_p |
5f5c8ee5 GM |
1442 | /* Different partially visible characters on left margin. */ |
1443 | || a->x != b->x | |
1444 | /* Different height. */ | |
1445 | || a->ascent != b->ascent | |
408f5064 GM |
1446 | || a->phys_ascent != b->phys_ascent |
1447 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1448 | || a->visible_height != b->visible_height) |
1449 | return 0; | |
1450 | } | |
1451 | ||
1452 | return 1; | |
1453 | } | |
1454 | ||
1455 | ||
1456 | \f | |
1457 | /*********************************************************************** | |
1458 | Glyph Pool | |
1459 | ||
1460 | See dispextern.h for an overall explanation of glyph pools. | |
1461 | ***********************************************************************/ | |
1462 | ||
1463 | /* Allocate a glyph_pool structure. The structure returned is | |
1464 | initialized with zeros. The global variable glyph_pool_count is | |
1465 | incremented for each pool allocated. */ | |
1466 | ||
1467 | static struct glyph_pool * | |
971de7fb | 1468 | new_glyph_pool (void) |
5f5c8ee5 GM |
1469 | { |
1470 | struct glyph_pool *result; | |
1471 | ||
1472 | /* Allocate a new glyph_pool and clear it. */ | |
1473 | result = (struct glyph_pool *) xmalloc (sizeof *result); | |
72af86bd | 1474 | memset (result, 0, sizeof *result); |
177c0ea7 | 1475 | |
5f5c8ee5 GM |
1476 | /* For memory leak and double deletion checking. */ |
1477 | ++glyph_pool_count; | |
177c0ea7 | 1478 | |
5f5c8ee5 GM |
1479 | return result; |
1480 | } | |
1481 | ||
1482 | ||
1483 | /* Free a glyph_pool structure POOL. The function may be called with | |
1484 | a null POOL pointer. The global variable glyph_pool_count is | |
1485 | decremented with every pool structure freed. If this count gets | |
1486 | negative, more structures were freed than allocated, i.e. one | |
1487 | structure must have been freed more than once or a bogus pointer | |
1488 | was passed to free_glyph_pool. */ | |
1489 | ||
1490 | static void | |
971de7fb | 1491 | free_glyph_pool (struct glyph_pool *pool) |
5f5c8ee5 GM |
1492 | { |
1493 | if (pool) | |
1494 | { | |
153a073c | 1495 | /* More freed than allocated? */ |
5f5c8ee5 GM |
1496 | --glyph_pool_count; |
1497 | xassert (glyph_pool_count >= 0); | |
1498 | ||
1499 | xfree (pool->glyphs); | |
1500 | xfree (pool); | |
1501 | } | |
1502 | } | |
1503 | ||
1504 | ||
1505 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1506 | columns we need. This function never shrinks a pool. The only | |
1507 | case in which this would make sense, would be when a frame's size | |
1508 | is changed from a large value to a smaller one. But, if someone | |
1509 | does it once, we can expect that he will do it again. | |
1510 | ||
1511 | Value is non-zero if the pool changed in a way which makes | |
1512 | re-adjusting window glyph matrices necessary. */ | |
1513 | ||
1514 | static int | |
971de7fb | 1515 | realloc_glyph_pool (struct glyph_pool *pool, struct dim matrix_dim) |
5f5c8ee5 GM |
1516 | { |
1517 | int needed; | |
1518 | int changed_p; | |
1519 | ||
1520 | changed_p = (pool->glyphs == 0 | |
1521 | || matrix_dim.height != pool->nrows | |
1522 | || matrix_dim.width != pool->ncolumns); | |
1523 | ||
1524 | /* Enlarge the glyph pool. */ | |
1525 | needed = matrix_dim.width * matrix_dim.height; | |
1526 | if (needed > pool->nglyphs) | |
1527 | { | |
1528 | int size = needed * sizeof (struct glyph); | |
1529 | ||
1530 | if (pool->glyphs) | |
cb4545ad EZ |
1531 | { |
1532 | pool->glyphs = (struct glyph *) xrealloc (pool->glyphs, size); | |
1533 | memset (pool->glyphs + pool->nglyphs, 0, | |
1534 | size - pool->nglyphs * sizeof (struct glyph)); | |
1535 | } | |
5f5c8ee5 GM |
1536 | else |
1537 | { | |
1538 | pool->glyphs = (struct glyph *) xmalloc (size); | |
72af86bd | 1539 | memset (pool->glyphs, 0, size); |
5f5c8ee5 GM |
1540 | } |
1541 | ||
1542 | pool->nglyphs = needed; | |
1543 | } | |
1544 | ||
153a073c | 1545 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1546 | to do sanity checks, and (b) the number of columns determines |
1547 | where rows in the frame matrix start---this must be available to | |
1548 | determine pointers to rows of window sub-matrices. */ | |
1549 | pool->nrows = matrix_dim.height; | |
1550 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1551 | |
5f5c8ee5 GM |
1552 | return changed_p; |
1553 | } | |
1554 | ||
1555 | ||
1556 | \f | |
1557 | /*********************************************************************** | |
1558 | Debug Code | |
1559 | ***********************************************************************/ | |
1560 | ||
1561 | #if GLYPH_DEBUG | |
1562 | ||
a13396c9 | 1563 | |
28d440ab KL |
1564 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1565 | XXX Maybe this should be changed to flush the current terminal instead of | |
1566 | stdout. | |
1567 | */ | |
a13396c9 GM |
1568 | |
1569 | void | |
1570 | flush_stdout () | |
1571 | { | |
1572 | fflush (stdout); | |
1573 | } | |
1574 | ||
1575 | ||
5f5c8ee5 GM |
1576 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1577 | pointer has been lost, e.g. by using a structure assignment between | |
1578 | rows, at least one pointer must occur more than once in the rows of | |
1579 | MATRIX. */ | |
1580 | ||
1581 | void | |
1582 | check_matrix_pointer_lossage (matrix) | |
1583 | struct glyph_matrix *matrix; | |
1584 | { | |
1585 | int i, j; | |
177c0ea7 | 1586 | |
5f5c8ee5 GM |
1587 | for (i = 0; i < matrix->nrows; ++i) |
1588 | for (j = 0; j < matrix->nrows; ++j) | |
1589 | xassert (i == j | |
1590 | || (matrix->rows[i].glyphs[TEXT_AREA] | |
1591 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1592 | } | |
1593 | ||
1594 | ||
1595 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1596 | ||
1597 | struct glyph_row * | |
1598 | matrix_row (matrix, row) | |
1599 | struct glyph_matrix *matrix; | |
1600 | int row; | |
1601 | { | |
1602 | xassert (matrix && matrix->rows); | |
1603 | xassert (row >= 0 && row < matrix->nrows); | |
1604 | ||
1605 | /* That's really too slow for normal testing because this function | |
1606 | is called almost everywhere. Although---it's still astonishingly | |
1607 | fast, so it is valuable to have for debugging purposes. */ | |
1608 | #if 0 | |
1609 | check_matrix_pointer_lossage (matrix); | |
1610 | #endif | |
177c0ea7 | 1611 | |
5f5c8ee5 GM |
1612 | return matrix->rows + row; |
1613 | } | |
1614 | ||
1615 | ||
1616 | #if 0 /* This function makes invalid assumptions when text is | |
1617 | partially invisible. But it might come handy for debugging | |
1618 | nevertheless. */ | |
1619 | ||
1620 | /* Check invariants that must hold for an up to date current matrix of | |
1621 | window W. */ | |
1622 | ||
1623 | static void | |
1624 | check_matrix_invariants (w) | |
1625 | struct window *w; | |
1626 | { | |
1627 | struct glyph_matrix *matrix = w->current_matrix; | |
1628 | int yb = window_text_bottom_y (w); | |
1629 | struct glyph_row *row = matrix->rows; | |
1630 | struct glyph_row *last_text_row = NULL; | |
1631 | struct buffer *saved = current_buffer; | |
1632 | struct buffer *buffer = XBUFFER (w->buffer); | |
1633 | int c; | |
177c0ea7 | 1634 | |
5f5c8ee5 GM |
1635 | /* This can sometimes happen for a fresh window. */ |
1636 | if (matrix->nrows < 2) | |
1637 | return; | |
1638 | ||
1639 | set_buffer_temp (buffer); | |
1640 | ||
1641 | /* Note: last row is always reserved for the mode line. */ | |
1642 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1643 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1644 | { | |
1645 | struct glyph_row *next = row + 1; | |
1646 | ||
1647 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1648 | last_text_row = row; | |
1649 | ||
1650 | /* Check that character and byte positions are in sync. */ | |
1651 | xassert (MATRIX_ROW_START_BYTEPOS (row) | |
1652 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); | |
d36fe237 EZ |
1653 | xassert (BYTEPOS (row->start.pos) |
1654 | == CHAR_TO_BYTE (CHARPOS (row->start.pos))); | |
5f5c8ee5 GM |
1655 | |
1656 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1657 | have such a position temporarily in case of a minibuffer | |
1658 | displaying something like `[Sole completion]' at its end. */ | |
1659 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
d36fe237 EZ |
1660 | { |
1661 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1662 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); | |
1663 | xassert (BYTEPOS (row->end.pos) | |
1664 | == CHAR_TO_BYTE (CHARPOS (row->end.pos))); | |
1665 | } | |
5f5c8ee5 GM |
1666 | |
1667 | /* Check that end position of `row' is equal to start position | |
1668 | of next row. */ | |
1669 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1670 | { | |
1671 | xassert (MATRIX_ROW_END_CHARPOS (row) | |
1672 | == MATRIX_ROW_START_CHARPOS (next)); | |
1673 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1674 | == MATRIX_ROW_START_BYTEPOS (next)); | |
d36fe237 EZ |
1675 | xassert (CHARPOS (row->end.pos) == CHARPOS (next->start.pos)); |
1676 | xassert (BYTEPOS (row->end.pos) == BYTEPOS (next->start.pos)); | |
5f5c8ee5 GM |
1677 | } |
1678 | row = next; | |
1679 | } | |
1680 | ||
1681 | xassert (w->current_matrix->nrows == w->desired_matrix->nrows); | |
1682 | xassert (w->desired_matrix->rows != NULL); | |
1683 | set_buffer_temp (saved); | |
1684 | } | |
1685 | ||
1686 | #endif /* 0 */ | |
1687 | ||
1688 | #endif /* GLYPH_DEBUG != 0 */ | |
1689 | ||
1690 | ||
1691 | \f | |
1692 | /********************************************************************** | |
1693 | Allocating/ Adjusting Glyph Matrices | |
1694 | **********************************************************************/ | |
1695 | ||
1696 | /* Allocate glyph matrices over a window tree for a frame-based | |
1697 | redisplay | |
1698 | ||
1699 | X and Y are column/row within the frame glyph matrix where | |
1700 | sub-matrices for the window tree rooted at WINDOW must be | |
8ce2650d YM |
1701 | allocated. DIM_ONLY_P non-zero means that the caller of this |
1702 | function is only interested in the result matrix dimension, and | |
1703 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1704 | |
1705 | The function returns the total width/height of the sub-matrices of | |
1706 | the window tree. If called on a frame root window, the computation | |
1707 | will take the mini-buffer window into account. | |
1708 | ||
1709 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1710 | ||
1711 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1712 | glyph matrices yet, and | |
1713 | ||
1714 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1715 | any window in the tree will be changed or have been changed (see | |
153a073c | 1716 | DIM_ONLY_P) |
5f5c8ee5 GM |
1717 | |
1718 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1719 | function. | |
1720 | ||
1721 | Windows are arranged into chains of windows on the same level | |
1722 | through the next fields of window structures. Such a level can be | |
1723 | either a sequence of horizontally adjacent windows from left to | |
1724 | right, or a sequence of vertically adjacent windows from top to | |
1725 | bottom. Each window in a horizontal sequence can be either a leaf | |
1726 | window or a vertical sequence; a window in a vertical sequence can | |
1727 | be either a leaf or a horizontal sequence. All windows in a | |
1728 | horizontal sequence have the same height, and all windows in a | |
1729 | vertical sequence have the same width. | |
1730 | ||
1731 | This function uses, for historical reasons, a more general | |
1732 | algorithm to determine glyph matrix dimensions that would be | |
1733 | necessary. | |
1734 | ||
1735 | The matrix height of a horizontal sequence is determined by the | |
1736 | maximum height of any matrix in the sequence. The matrix width of | |
1737 | a horizontal sequence is computed by adding up matrix widths of | |
1738 | windows in the sequence. | |
1739 | ||
1740 | |<------- result width ------->| | |
1741 | +---------+----------+---------+ --- | |
1742 | | | | | | | |
1743 | | | | | | |
1744 | +---------+ | | result height | |
1745 | | +---------+ | |
1746 | | | | | |
1747 | +----------+ --- | |
1748 | ||
1749 | The matrix width of a vertical sequence is the maximum matrix width | |
1750 | of any window in the sequence. Its height is computed by adding up | |
1751 | matrix heights of windows in the sequence. | |
1752 | ||
1753 | |<---- result width -->| | |
1754 | +---------+ --- | |
1755 | | | | | |
1756 | | | | | |
1757 | +---------+--+ | | |
1758 | | | | | |
1759 | | | result height | |
1760 | | | | |
1761 | +------------+---------+ | | |
1762 | | | | | |
1763 | | | | | |
1764 | +------------+---------+ --- */ | |
1765 | ||
1766 | /* Bit indicating that a new matrix will be allocated or has been | |
1767 | allocated. */ | |
1768 | ||
1769 | #define NEW_LEAF_MATRIX (1 << 0) | |
1770 | ||
1771 | /* Bit indicating that a matrix will or has changed its location or | |
1772 | size. */ | |
1773 | ||
1774 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1775 | ||
1776 | static struct dim | |
6f704c76 DN |
1777 | allocate_matrices_for_frame_redisplay (Lisp_Object window, int x, int y, |
1778 | int dim_only_p, int *window_change_flags) | |
5f5c8ee5 GM |
1779 | { |
1780 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1781 | int x0 = x, y0 = y; | |
1782 | int wmax = 0, hmax = 0; | |
1783 | struct dim total; | |
1784 | struct dim dim; | |
1785 | struct window *w; | |
1786 | int in_horz_combination_p; | |
1787 | ||
1788 | /* What combination is WINDOW part of? Compute this once since the | |
1789 | result is the same for all windows in the `next' chain. The | |
1790 | special case of a root window (parent equal to nil) is treated | |
1791 | like a vertical combination because a root window's `next' | |
1792 | points to the mini-buffer window, if any, which is arranged | |
1793 | vertically below other windows. */ | |
1794 | in_horz_combination_p | |
1795 | = (!NILP (XWINDOW (window)->parent) | |
1796 | && !NILP (XWINDOW (XWINDOW (window)->parent)->hchild)); | |
1797 | ||
1798 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1799 | do |
5f5c8ee5 GM |
1800 | { |
1801 | w = XWINDOW (window); | |
1802 | ||
1803 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1804 | on whether this is a combination or a leaf window. */ |
5f5c8ee5 | 1805 | if (!NILP (w->hchild)) |
177c0ea7 | 1806 | dim = allocate_matrices_for_frame_redisplay (w->hchild, x, y, |
5f5c8ee5 GM |
1807 | dim_only_p, |
1808 | window_change_flags); | |
1809 | else if (!NILP (w->vchild)) | |
177c0ea7 | 1810 | dim = allocate_matrices_for_frame_redisplay (w->vchild, x, y, |
5f5c8ee5 GM |
1811 | dim_only_p, |
1812 | window_change_flags); | |
1813 | else | |
1814 | { | |
1815 | /* If not already done, allocate sub-matrix structures. */ | |
1816 | if (w->desired_matrix == NULL) | |
1817 | { | |
1818 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1819 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1820 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1821 | } | |
177c0ea7 | 1822 | |
5f5c8ee5 GM |
1823 | /* Width and height MUST be chosen so that there are no |
1824 | holes in the frame matrix. */ | |
5d3cc43c GM |
1825 | dim.width = required_matrix_width (w); |
1826 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1827 | |
1828 | /* Will matrix be re-allocated? */ | |
1829 | if (x != w->desired_matrix->matrix_x | |
1830 | || y != w->desired_matrix->matrix_y | |
1831 | || dim.width != w->desired_matrix->matrix_w | |
1832 | || dim.height != w->desired_matrix->matrix_h | |
1833 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1834 | w->left_margin_cols) |
5f5c8ee5 GM |
1835 | != w->desired_matrix->left_margin_glyphs) |
1836 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1837 | w->right_margin_cols) |
5f5c8ee5 GM |
1838 | != w->desired_matrix->right_margin_glyphs)) |
1839 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1840 | ||
1841 | /* Actually change matrices, if allowed. Do not consider | |
1842 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1843 | may have been changed which we don't now here. We trust | |
1844 | that we only will be called with DIM_ONLY_P != 0 when | |
1845 | necessary. */ | |
1846 | if (!dim_only_p) | |
1847 | { | |
1848 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1849 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1850 | } | |
1851 | } | |
1852 | ||
1853 | /* If we are part of a horizontal combination, advance x for | |
1854 | windows to the right of W; otherwise advance y for windows | |
1855 | below W. */ | |
1856 | if (in_horz_combination_p) | |
1857 | x += dim.width; | |
177c0ea7 | 1858 | else |
5f5c8ee5 GM |
1859 | y += dim.height; |
1860 | ||
1861 | /* Remember maximum glyph matrix dimensions. */ | |
1862 | wmax = max (wmax, dim.width); | |
1863 | hmax = max (hmax, dim.height); | |
1864 | ||
1865 | /* Next window on same level. */ | |
1866 | window = w->next; | |
1867 | } | |
1868 | while (!NILP (window)); | |
1869 | ||
1870 | /* Set `total' to the total glyph matrix dimension of this window | |
1871 | level. In a vertical combination, the width is the width of the | |
1872 | widest window; the height is the y we finally reached, corrected | |
1873 | by the y we started with. In a horizontal combination, the total | |
1874 | height is the height of the tallest window, and the width is the | |
1875 | x we finally reached, corrected by the x we started with. */ | |
1876 | if (in_horz_combination_p) | |
1877 | { | |
1878 | total.width = x - x0; | |
1879 | total.height = hmax; | |
1880 | } | |
177c0ea7 | 1881 | else |
5f5c8ee5 GM |
1882 | { |
1883 | total.width = wmax; | |
1884 | total.height = y - y0; | |
1885 | } | |
1886 | ||
1887 | return total; | |
1888 | } | |
1889 | ||
1890 | ||
5d3cc43c GM |
1891 | /* Return the required height of glyph matrices for window W. */ |
1892 | ||
1893 | int | |
971de7fb | 1894 | required_matrix_height (struct window *w) |
5d3cc43c GM |
1895 | { |
1896 | #ifdef HAVE_WINDOW_SYSTEM | |
1897 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 1898 | |
5d3cc43c GM |
1899 | if (FRAME_WINDOW_P (f)) |
1900 | { | |
1901 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1ea40aa2 | 1902 | int window_pixel_height = window_box_height (w) + eabs (w->vscroll); |
5d3cc43c | 1903 | return (((window_pixel_height + ch_height - 1) |
cc834cf9 | 1904 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
1905 | /* One partially visible line at the top and |
1906 | bottom of the window. */ | |
1907 | + 2 | |
153a073c | 1908 | /* 2 for header and mode line. */ |
5d3cc43c GM |
1909 | + 2); |
1910 | } | |
1911 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 1912 | |
7df02016 | 1913 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
1914 | } |
1915 | ||
1916 | ||
1917 | /* Return the required width of glyph matrices for window W. */ | |
1918 | ||
1919 | int | |
971de7fb | 1920 | required_matrix_width (struct window *w) |
5d3cc43c GM |
1921 | { |
1922 | #ifdef HAVE_WINDOW_SYSTEM | |
1923 | struct frame *f = XFRAME (w->frame); | |
1924 | if (FRAME_WINDOW_P (f)) | |
1925 | { | |
1926 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 1927 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 1928 | |
5d3cc43c GM |
1929 | /* Compute number of glyphs needed in a glyph row. */ |
1930 | return (((window_pixel_width + ch_width - 1) | |
cc834cf9 | 1931 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
1932 | /* 2 partially visible columns in the text area. */ |
1933 | + 2 | |
1934 | /* One partially visible column at the right | |
1935 | edge of each marginal area. */ | |
1936 | + 1 + 1); | |
1937 | } | |
1938 | #endif /* HAVE_WINDOW_SYSTEM */ | |
1939 | ||
7df02016 | 1940 | return XINT (w->total_cols); |
5d3cc43c GM |
1941 | } |
1942 | ||
1943 | ||
5f5c8ee5 | 1944 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 1945 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 1946 | |
5f5c8ee5 | 1947 | static void |
971de7fb | 1948 | allocate_matrices_for_window_redisplay (struct window *w) |
5f5c8ee5 | 1949 | { |
5f5c8ee5 GM |
1950 | while (w) |
1951 | { | |
1952 | if (!NILP (w->vchild)) | |
5d3cc43c | 1953 | allocate_matrices_for_window_redisplay (XWINDOW (w->vchild)); |
5f5c8ee5 | 1954 | else if (!NILP (w->hchild)) |
5d3cc43c | 1955 | allocate_matrices_for_window_redisplay (XWINDOW (w->hchild)); |
5f5c8ee5 GM |
1956 | else |
1957 | { | |
1958 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
1959 | struct dim dim; |
1960 | ||
1961 | /* If matrices are not yet allocated, allocate them now. */ | |
1962 | if (w->desired_matrix == NULL) | |
1963 | { | |
1964 | w->desired_matrix = new_glyph_matrix (NULL); | |
1965 | w->current_matrix = new_glyph_matrix (NULL); | |
1966 | } | |
1967 | ||
5d3cc43c GM |
1968 | dim.width = required_matrix_width (w); |
1969 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1970 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
1971 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
1972 | } | |
177c0ea7 | 1973 | |
5f5c8ee5 GM |
1974 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
1975 | } | |
1976 | } | |
1977 | ||
1978 | ||
1979 | /* Re-allocate/ re-compute glyph matrices on frame F. If F is null, | |
1980 | do it for all frames; otherwise do it just for the given frame. | |
1981 | This function must be called when a new frame is created, its size | |
1982 | changes, or its window configuration changes. */ | |
1983 | ||
1984 | void | |
971de7fb | 1985 | adjust_glyphs (struct frame *f) |
5f5c8ee5 | 1986 | { |
408f5064 GM |
1987 | /* Block input so that expose events and other events that access |
1988 | glyph matrices are not processed while we are changing them. */ | |
1989 | BLOCK_INPUT; | |
1990 | ||
5f5c8ee5 GM |
1991 | if (f) |
1992 | adjust_frame_glyphs (f); | |
1993 | else | |
1994 | { | |
1995 | Lisp_Object tail, lisp_frame; | |
177c0ea7 | 1996 | |
5f5c8ee5 GM |
1997 | FOR_EACH_FRAME (tail, lisp_frame) |
1998 | adjust_frame_glyphs (XFRAME (lisp_frame)); | |
1999 | } | |
408f5064 GM |
2000 | |
2001 | UNBLOCK_INPUT; | |
5f5c8ee5 GM |
2002 | } |
2003 | ||
2004 | ||
2005 | /* Adjust frame glyphs when Emacs is initialized. | |
177c0ea7 JB |
2006 | |
2007 | To be called from init_display. | |
2008 | ||
5f5c8ee5 GM |
2009 | We need a glyph matrix because redraw will happen soon. |
2010 | Unfortunately, window sizes on selected_frame are not yet set to | |
2011 | meaningful values. I believe we can assume that there are only two | |
2012 | windows on the frame---the mini-buffer and the root window. Frame | |
2013 | height and width seem to be correct so far. So, set the sizes of | |
2014 | windows to estimated values. */ | |
2015 | ||
2016 | static void | |
971de7fb | 2017 | adjust_frame_glyphs_initially (void) |
5f5c8ee5 | 2018 | { |
91fb7e1b GM |
2019 | struct frame *sf = SELECTED_FRAME (); |
2020 | struct window *root = XWINDOW (sf->root_window); | |
5f5c8ee5 | 2021 | struct window *mini = XWINDOW (root->next); |
7df02016 KS |
2022 | int frame_lines = FRAME_LINES (sf); |
2023 | int frame_cols = FRAME_COLS (sf); | |
91fb7e1b | 2024 | int top_margin = FRAME_TOP_MARGIN (sf); |
5f5c8ee5 GM |
2025 | |
2026 | /* Do it for the root window. */ | |
7df02016 KS |
2027 | XSETFASTINT (root->top_line, top_margin); |
2028 | XSETFASTINT (root->total_cols, frame_cols); | |
2029 | set_window_height (sf->root_window, frame_lines - 1 - top_margin, 0); | |
5f5c8ee5 GM |
2030 | |
2031 | /* Do it for the mini-buffer window. */ | |
7df02016 KS |
2032 | XSETFASTINT (mini->top_line, frame_lines - 1); |
2033 | XSETFASTINT (mini->total_cols, frame_cols); | |
5f5c8ee5 GM |
2034 | set_window_height (root->next, 1, 0); |
2035 | ||
91fb7e1b | 2036 | adjust_frame_glyphs (sf); |
5f5c8ee5 GM |
2037 | glyphs_initialized_initially_p = 1; |
2038 | } | |
177c0ea7 | 2039 | |
5f5c8ee5 GM |
2040 | |
2041 | /* Allocate/reallocate glyph matrices of a single frame F. */ | |
2042 | ||
2043 | static void | |
971de7fb | 2044 | adjust_frame_glyphs (struct frame *f) |
5f5c8ee5 GM |
2045 | { |
2046 | if (FRAME_WINDOW_P (f)) | |
2047 | adjust_frame_glyphs_for_window_redisplay (f); | |
2048 | else | |
2049 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 2050 | |
5f5c8ee5 GM |
2051 | /* Don't forget the message buffer and the buffer for |
2052 | decode_mode_spec. */ | |
2053 | adjust_frame_message_buffer (f); | |
2054 | adjust_decode_mode_spec_buffer (f); | |
2055 | ||
2056 | f->glyphs_initialized_p = 1; | |
2057 | } | |
2058 | ||
075757cc CY |
2059 | /* Return 1 if any window in the tree has nonzero window margins. See |
2060 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ | |
2061 | static int | |
971de7fb | 2062 | showing_window_margins_p (struct window *w) |
075757cc CY |
2063 | { |
2064 | while (w) | |
2065 | { | |
2066 | if (!NILP (w->hchild)) | |
2067 | { | |
2068 | if (showing_window_margins_p (XWINDOW (w->hchild))) | |
2069 | return 1; | |
2070 | } | |
2071 | else if (!NILP (w->vchild)) | |
2072 | { | |
2073 | if (showing_window_margins_p (XWINDOW (w->vchild))) | |
2074 | return 1; | |
2075 | } | |
2076 | else if (!NILP (w->left_margin_cols) | |
2077 | || !NILP (w->right_margin_cols)) | |
2078 | return 1; | |
3fc809e2 | 2079 | |
075757cc CY |
2080 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2081 | } | |
2082 | return 0; | |
2083 | } | |
2084 | ||
5f5c8ee5 | 2085 | |
c9f00270 GM |
2086 | /* In the window tree with root W, build current matrices of leaf |
2087 | windows from the frame's current matrix. */ | |
2088 | ||
2089 | static void | |
971de7fb | 2090 | fake_current_matrices (Lisp_Object window) |
c9f00270 GM |
2091 | { |
2092 | struct window *w; | |
177c0ea7 | 2093 | |
c9f00270 GM |
2094 | for (; !NILP (window); window = w->next) |
2095 | { | |
2096 | w = XWINDOW (window); | |
177c0ea7 | 2097 | |
c9f00270 GM |
2098 | if (!NILP (w->hchild)) |
2099 | fake_current_matrices (w->hchild); | |
2100 | else if (!NILP (w->vchild)) | |
2101 | fake_current_matrices (w->vchild); | |
2102 | else | |
2103 | { | |
2104 | int i; | |
2105 | struct frame *f = XFRAME (w->frame); | |
2106 | struct glyph_matrix *m = w->current_matrix; | |
2107 | struct glyph_matrix *fm = f->current_matrix; | |
2108 | ||
7df02016 KS |
2109 | xassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
2110 | xassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 2111 | |
c9f00270 GM |
2112 | for (i = 0; i < m->matrix_h; ++i) |
2113 | { | |
2114 | struct glyph_row *r = m->rows + i; | |
7df02016 | 2115 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 GM |
2116 | |
2117 | xassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] | |
2118 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); | |
2119 | ||
2120 | r->enabled_p = fr->enabled_p; | |
2121 | if (r->enabled_p) | |
2122 | { | |
2123 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
2124 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
2125 | r->used[TEXT_AREA] = (m->matrix_w | |
2126 | - r->used[LEFT_MARGIN_AREA] | |
2127 | - r->used[RIGHT_MARGIN_AREA]); | |
2128 | r->mode_line_p = 0; | |
c9f00270 GM |
2129 | } |
2130 | } | |
2131 | } | |
2132 | } | |
2133 | } | |
2134 | ||
2135 | ||
bccee4f2 | 2136 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 2137 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 2138 | |
bccee4f2 | 2139 | static struct glyph_matrix * |
971de7fb | 2140 | save_current_matrix (struct frame *f) |
c9f00270 | 2141 | { |
bccee4f2 GM |
2142 | int i; |
2143 | struct glyph_matrix *saved; | |
e797dea6 | 2144 | |
bccee4f2 | 2145 | saved = (struct glyph_matrix *) xmalloc (sizeof *saved); |
72af86bd | 2146 | memset (saved, 0, sizeof *saved); |
bccee4f2 GM |
2147 | saved->nrows = f->current_matrix->nrows; |
2148 | saved->rows = (struct glyph_row *) xmalloc (saved->nrows | |
2149 | * sizeof *saved->rows); | |
72af86bd | 2150 | memset (saved->rows, 0, saved->nrows * sizeof *saved->rows); |
bccee4f2 GM |
2151 | |
2152 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 2153 | { |
bccee4f2 GM |
2154 | struct glyph_row *from = f->current_matrix->rows + i; |
2155 | struct glyph_row *to = saved->rows + i; | |
2156 | size_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); | |
2157 | to->glyphs[TEXT_AREA] = (struct glyph *) xmalloc (nbytes); | |
72af86bd | 2158 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
bccee4f2 | 2159 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
e797dea6 | 2160 | } |
bccee4f2 GM |
2161 | |
2162 | return saved; | |
2163 | } | |
2164 | ||
2165 | ||
2166 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
2167 | and free memory associated with SAVED. */ | |
2168 | ||
2169 | static void | |
971de7fb | 2170 | restore_current_matrix (struct frame *f, struct glyph_matrix *saved) |
bccee4f2 GM |
2171 | { |
2172 | int i; | |
2173 | ||
2174 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 2175 | { |
bccee4f2 GM |
2176 | struct glyph_row *from = saved->rows + i; |
2177 | struct glyph_row *to = f->current_matrix->rows + i; | |
e797dea6 | 2178 | size_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
72af86bd | 2179 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
e797dea6 | 2180 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
bccee4f2 | 2181 | xfree (from->glyphs[TEXT_AREA]); |
e797dea6 | 2182 | } |
177c0ea7 | 2183 | |
bccee4f2 GM |
2184 | xfree (saved->rows); |
2185 | xfree (saved); | |
c9f00270 GM |
2186 | } |
2187 | ||
2188 | ||
bccee4f2 | 2189 | |
5f5c8ee5 GM |
2190 | /* Allocate/reallocate glyph matrices of a single frame F for |
2191 | frame-based redisplay. */ | |
2192 | ||
2193 | static void | |
971de7fb | 2194 | adjust_frame_glyphs_for_frame_redisplay (struct frame *f) |
5f5c8ee5 | 2195 | { |
5f5c8ee5 GM |
2196 | struct dim matrix_dim; |
2197 | int pool_changed_p; | |
2198 | int window_change_flags; | |
2199 | int top_window_y; | |
2200 | ||
2201 | if (!FRAME_LIVE_P (f)) | |
2202 | return; | |
2203 | ||
5f5c8ee5 GM |
2204 | top_window_y = FRAME_TOP_MARGIN (f); |
2205 | ||
2206 | /* Allocate glyph pool structures if not already done. */ | |
2207 | if (f->desired_pool == NULL) | |
2208 | { | |
2209 | f->desired_pool = new_glyph_pool (); | |
2210 | f->current_pool = new_glyph_pool (); | |
2211 | } | |
2212 | ||
2213 | /* Allocate frames matrix structures if needed. */ | |
2214 | if (f->desired_matrix == NULL) | |
2215 | { | |
2216 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
2217 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
2218 | } | |
177c0ea7 | 2219 | |
5f5c8ee5 GM |
2220 | /* Compute window glyph matrices. (This takes the mini-buffer |
2221 | window into account). The result is the size of the frame glyph | |
2222 | matrix needed. The variable window_change_flags is set to a bit | |
2223 | mask indicating whether new matrices will be allocated or | |
2224 | existing matrices change their size or location within the frame | |
2225 | matrix. */ | |
2226 | window_change_flags = 0; | |
2227 | matrix_dim | |
2228 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
2229 | 0, top_window_y, | |
5d3cc43c | 2230 | 1, |
5f5c8ee5 GM |
2231 | &window_change_flags); |
2232 | ||
2233 | /* Add in menu bar lines, if any. */ | |
2234 | matrix_dim.height += top_window_y; | |
2235 | ||
2236 | /* Enlarge pools as necessary. */ | |
2237 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
2238 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
2239 | ||
177c0ea7 | 2240 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
2241 | absolutely necessary since it requires a frame redraw. */ |
2242 | if (pool_changed_p || window_change_flags) | |
2243 | { | |
2244 | /* Do it for window matrices. */ | |
2245 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 2246 | 0, top_window_y, 0, |
5f5c8ee5 GM |
2247 | &window_change_flags); |
2248 | ||
2249 | /* Size of frame matrices must equal size of frame. Note | |
2250 | that we are called for X frames with window widths NOT equal | |
2251 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
7df02016 KS |
2252 | xassert (matrix_dim.width == FRAME_COLS (f) |
2253 | && matrix_dim.height == FRAME_LINES (f)); | |
177c0ea7 | 2254 | |
e797dea6 GM |
2255 | /* Pointers to glyph memory in glyph rows are exchanged during |
2256 | the update phase of redisplay, which means in general that a | |
2257 | frame's current matrix consists of pointers into both the | |
2258 | desired and current glyph pool of the frame. Adjusting a | |
2259 | matrix sets the frame matrix up so that pointers are all into | |
2260 | the same pool. If we want to preserve glyph contents of the | |
2261 | current matrix over a call to adjust_glyph_matrix, we must | |
2262 | make a copy of the current glyphs, and restore the current | |
2263 | matrix' contents from that copy. */ | |
2264 | if (display_completed | |
2265 | && !FRAME_GARBAGED_P (f) | |
2266 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
2267 | && matrix_dim.height == f->current_matrix->matrix_h |
2268 | /* For some reason, the frame glyph matrix gets corrupted if | |
2269 | any of the windows contain margins. I haven't been able | |
2270 | to hunt down the reason, but for the moment this prevents | |
2271 | the problem from manifesting. -- cyd */ | |
2272 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) | |
e797dea6 | 2273 | { |
bccee4f2 GM |
2274 | struct glyph_matrix *copy = save_current_matrix (f); |
2275 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2276 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2277 | restore_current_matrix (f, copy); |
e797dea6 GM |
2278 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2279 | } | |
c9f00270 | 2280 | else |
e797dea6 | 2281 | { |
bccee4f2 | 2282 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2283 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2284 | SET_FRAME_GARBAGED (f); | |
2285 | } | |
5f5c8ee5 GM |
2286 | } |
2287 | } | |
2288 | ||
2289 | ||
2290 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2291 | window-based redisplay. */ | |
2292 | ||
2293 | static void | |
971de7fb | 2294 | adjust_frame_glyphs_for_window_redisplay (struct frame *f) |
5f5c8ee5 | 2295 | { |
5f5c8ee5 GM |
2296 | struct window *w; |
2297 | ||
2298 | xassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); | |
177c0ea7 | 2299 | |
5f5c8ee5 | 2300 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2301 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2302 | |
8ce2650d | 2303 | #ifdef HAVE_X_WINDOWS |
5f5c8ee5 GM |
2304 | /* Allocate/ reallocate matrices of the dummy window used to display |
2305 | the menu bar under X when no X toolkit support is available. */ | |
488dd4c4 | 2306 | #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2307 | { |
2308 | /* Allocate a dummy window if not already done. */ | |
2309 | if (NILP (f->menu_bar_window)) | |
2310 | { | |
2311 | f->menu_bar_window = make_window (); | |
2312 | w = XWINDOW (f->menu_bar_window); | |
2313 | XSETFRAME (w->frame, f); | |
2314 | w->pseudo_window_p = 1; | |
2315 | } | |
2316 | else | |
2317 | w = XWINDOW (f->menu_bar_window); | |
2318 | ||
2319 | /* Set window dimensions to frame dimensions and allocate or | |
2320 | adjust glyph matrices of W. */ | |
7df02016 KS |
2321 | XSETFASTINT (w->top_line, 0); |
2322 | XSETFASTINT (w->left_col, 0); | |
2323 | XSETFASTINT (w->total_lines, FRAME_MENU_BAR_LINES (f)); | |
2324 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
5d3cc43c | 2325 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2326 | } |
57714a86 YM |
2327 | #endif /* not USE_X_TOOLKIT && not USE_GTK */ |
2328 | #endif /* HAVE_X_WINDOWS */ | |
5f5c8ee5 | 2329 | |
488dd4c4 | 2330 | #ifndef USE_GTK |
9ea173e8 GM |
2331 | /* Allocate/ reallocate matrices of the tool bar window. If we |
2332 | don't have a tool bar window yet, make one. */ | |
2333 | if (NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2334 | { |
9ea173e8 GM |
2335 | f->tool_bar_window = make_window (); |
2336 | w = XWINDOW (f->tool_bar_window); | |
5f5c8ee5 GM |
2337 | XSETFRAME (w->frame, f); |
2338 | w->pseudo_window_p = 1; | |
2339 | } | |
2340 | else | |
9ea173e8 | 2341 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2342 | |
7df02016 KS |
2343 | XSETFASTINT (w->top_line, FRAME_MENU_BAR_LINES (f)); |
2344 | XSETFASTINT (w->left_col, 0); | |
2345 | XSETFASTINT (w->total_lines, FRAME_TOOL_BAR_LINES (f)); | |
2346 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
5d3cc43c | 2347 | allocate_matrices_for_window_redisplay (w); |
488dd4c4 | 2348 | #endif |
5f5c8ee5 GM |
2349 | } |
2350 | ||
2351 | ||
177c0ea7 | 2352 | /* Adjust/ allocate message buffer of frame F. |
5f5c8ee5 | 2353 | |
5f5c8ee5 GM |
2354 | Note that the message buffer is never freed. Since I could not |
2355 | find a free in 19.34, I assume that freeing it would be | |
2356 | problematic in some way and don't do it either. | |
2357 | ||
2358 | (Implementation note: It should be checked if we can free it | |
2359 | eventually without causing trouble). */ | |
2360 | ||
2361 | static void | |
971de7fb | 2362 | adjust_frame_message_buffer (struct frame *f) |
5f5c8ee5 GM |
2363 | { |
2364 | int size = FRAME_MESSAGE_BUF_SIZE (f) + 1; | |
2365 | ||
2366 | if (FRAME_MESSAGE_BUF (f)) | |
2367 | { | |
2368 | char *buffer = FRAME_MESSAGE_BUF (f); | |
2369 | char *new_buffer = (char *) xrealloc (buffer, size); | |
5f5c8ee5 GM |
2370 | FRAME_MESSAGE_BUF (f) = new_buffer; |
2371 | } | |
2372 | else | |
2373 | FRAME_MESSAGE_BUF (f) = (char *) xmalloc (size); | |
2374 | } | |
2375 | ||
2376 | ||
2377 | /* Re-allocate buffer for decode_mode_spec on frame F. */ | |
2378 | ||
2379 | static void | |
971de7fb | 2380 | adjust_decode_mode_spec_buffer (struct frame *f) |
5f5c8ee5 GM |
2381 | { |
2382 | f->decode_mode_spec_buffer | |
2383 | = (char *) xrealloc (f->decode_mode_spec_buffer, | |
2384 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
2385 | } | |
2386 | ||
2387 | ||
2388 | \f | |
2389 | /********************************************************************** | |
2390 | Freeing Glyph Matrices | |
2391 | **********************************************************************/ | |
2392 | ||
2393 | /* Free glyph memory for a frame F. F may be null. This function can | |
2394 | be called for the same frame more than once. The root window of | |
2395 | F may be nil when this function is called. This is the case when | |
2396 | the function is called when F is destroyed. */ | |
2397 | ||
2398 | void | |
971de7fb | 2399 | free_glyphs (struct frame *f) |
5f5c8ee5 GM |
2400 | { |
2401 | if (f && f->glyphs_initialized_p) | |
2402 | { | |
42f55fe0 GM |
2403 | /* Block interrupt input so that we don't get surprised by an X |
2404 | event while we're in an inconsistent state. */ | |
2405 | BLOCK_INPUT; | |
5f5c8ee5 | 2406 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2407 | |
5f5c8ee5 GM |
2408 | /* Release window sub-matrices. */ |
2409 | if (!NILP (f->root_window)) | |
2410 | free_window_matrices (XWINDOW (f->root_window)); | |
2411 | ||
2412 | /* Free the dummy window for menu bars without X toolkit and its | |
2413 | glyph matrices. */ | |
2414 | if (!NILP (f->menu_bar_window)) | |
2415 | { | |
2416 | struct window *w = XWINDOW (f->menu_bar_window); | |
2417 | free_glyph_matrix (w->desired_matrix); | |
2418 | free_glyph_matrix (w->current_matrix); | |
2419 | w->desired_matrix = w->current_matrix = NULL; | |
2420 | f->menu_bar_window = Qnil; | |
2421 | } | |
2422 | ||
9ea173e8 GM |
2423 | /* Free the tool bar window and its glyph matrices. */ |
2424 | if (!NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2425 | { |
9ea173e8 | 2426 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2427 | free_glyph_matrix (w->desired_matrix); |
2428 | free_glyph_matrix (w->current_matrix); | |
2429 | w->desired_matrix = w->current_matrix = NULL; | |
9ea173e8 | 2430 | f->tool_bar_window = Qnil; |
5f5c8ee5 GM |
2431 | } |
2432 | ||
2433 | /* Release frame glyph matrices. Reset fields to zero in | |
2434 | case we are called a second time. */ | |
2435 | if (f->desired_matrix) | |
2436 | { | |
2437 | free_glyph_matrix (f->desired_matrix); | |
2438 | free_glyph_matrix (f->current_matrix); | |
2439 | f->desired_matrix = f->current_matrix = NULL; | |
2440 | } | |
2441 | ||
2442 | /* Release glyph pools. */ | |
2443 | if (f->desired_pool) | |
2444 | { | |
2445 | free_glyph_pool (f->desired_pool); | |
2446 | free_glyph_pool (f->current_pool); | |
2447 | f->desired_pool = f->current_pool = NULL; | |
2448 | } | |
177c0ea7 | 2449 | |
42f55fe0 | 2450 | UNBLOCK_INPUT; |
5f5c8ee5 GM |
2451 | } |
2452 | } | |
2453 | ||
2454 | ||
2455 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2456 | function may be called with a null pointer, and it may be called on | |
2457 | the same tree more than once. */ | |
2458 | ||
2459 | void | |
971de7fb | 2460 | free_window_matrices (struct window *w) |
5f5c8ee5 GM |
2461 | { |
2462 | while (w) | |
2463 | { | |
2464 | if (!NILP (w->hchild)) | |
2465 | free_window_matrices (XWINDOW (w->hchild)); | |
2466 | else if (!NILP (w->vchild)) | |
2467 | free_window_matrices (XWINDOW (w->vchild)); | |
177c0ea7 | 2468 | else |
5f5c8ee5 GM |
2469 | { |
2470 | /* This is a leaf window. Free its memory and reset fields | |
2471 | to zero in case this function is called a second time for | |
2472 | W. */ | |
2473 | free_glyph_matrix (w->current_matrix); | |
2474 | free_glyph_matrix (w->desired_matrix); | |
2475 | w->current_matrix = w->desired_matrix = NULL; | |
2476 | } | |
2477 | ||
2478 | /* Next window on same level. */ | |
2479 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2480 | } | |
2481 | } | |
2482 | ||
2483 | ||
2484 | /* Check glyph memory leaks. This function is called from | |
2485 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2486 | exits. We therefore free all glyph memory for all active frames | |
2487 | explicitly and check that nothing is left allocated. */ | |
2488 | ||
2489 | void | |
971de7fb | 2490 | check_glyph_memory (void) |
5f5c8ee5 GM |
2491 | { |
2492 | Lisp_Object tail, frame; | |
2493 | ||
2494 | /* Free glyph memory for all frames. */ | |
2495 | FOR_EACH_FRAME (tail, frame) | |
2496 | free_glyphs (XFRAME (frame)); | |
2497 | ||
2498 | /* Check that nothing is left allocated. */ | |
2499 | if (glyph_matrix_count) | |
2500 | abort (); | |
2501 | if (glyph_pool_count) | |
2502 | abort (); | |
2503 | } | |
2504 | ||
2505 | ||
2506 | \f | |
2507 | /********************************************************************** | |
2508 | Building a Frame Matrix | |
2509 | **********************************************************************/ | |
2510 | ||
2511 | /* Most of the redisplay code works on glyph matrices attached to | |
2512 | windows. This is a good solution most of the time, but it is not | |
2513 | suitable for terminal code. Terminal output functions cannot rely | |
2514 | on being able to set an arbitrary terminal window. Instead they | |
2515 | must be provided with a view of the whole frame, i.e. the whole | |
2516 | screen. We build such a view by constructing a frame matrix from | |
2517 | window matrices in this section. | |
2518 | ||
2519 | Windows that must be updated have their must_be_update_p flag set. | |
2520 | For all such windows, their desired matrix is made part of the | |
2521 | desired frame matrix. For other windows, their current matrix is | |
2522 | made part of the desired frame matrix. | |
2523 | ||
2524 | +-----------------+----------------+ | |
2525 | | desired | desired | | |
2526 | | | | | |
2527 | +-----------------+----------------+ | |
2528 | | current | | |
2529 | | | | |
2530 | +----------------------------------+ | |
2531 | ||
2532 | Desired window matrices can be made part of the frame matrix in a | |
2533 | cheap way: We exploit the fact that the desired frame matrix and | |
2534 | desired window matrices share their glyph memory. This is not | |
2535 | possible for current window matrices. Their glyphs are copied to | |
2536 | the desired frame matrix. The latter is equivalent to | |
2537 | preserve_other_columns in the old redisplay. | |
2538 | ||
2539 | Used glyphs counters for frame matrix rows are the result of adding | |
2540 | up glyph lengths of the window matrices. A line in the frame | |
2541 | matrix is enabled, if a corresponding line in a window matrix is | |
2542 | enabled. | |
177c0ea7 | 2543 | |
5f5c8ee5 GM |
2544 | After building the desired frame matrix, it will be passed to |
2545 | terminal code, which will manipulate both the desired and current | |
2546 | frame matrix. Changes applied to the frame's current matrix have | |
2547 | to be visible in current window matrices afterwards, of course. | |
2548 | ||
2549 | This problem is solved like this: | |
2550 | ||
2551 | 1. Window and frame matrices share glyphs. Window matrices are | |
2552 | constructed in a way that their glyph contents ARE the glyph | |
2553 | contents needed in a frame matrix. Thus, any modification of | |
2554 | glyphs done in terminal code will be reflected in window matrices | |
2555 | automatically. | |
177c0ea7 | 2556 | |
5f5c8ee5 GM |
2557 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2558 | intercepted by hook functions so that corresponding row operations | |
2559 | on window matrices can be performed. This is necessary because we | |
2560 | use pointers to glyphs in glyph row structures. To satisfy the | |
2561 | assumption of point 1 above that glyphs are updated implicitly in | |
2562 | window matrices when they are manipulated via the frame matrix, | |
2563 | window and frame matrix must of course agree where to find the | |
2564 | glyphs for their rows. Possible manipulations that must be | |
2565 | mirrored are assignments of rows of the desired frame matrix to the | |
2566 | current frame matrix and scrolling the current frame matrix. */ | |
2567 | ||
2568 | /* Build frame F's desired matrix from window matrices. Only windows | |
2569 | which have the flag must_be_updated_p set have to be updated. Menu | |
2570 | bar lines of a frame are not covered by window matrices, so make | |
2571 | sure not to touch them in this function. */ | |
2572 | ||
2573 | static void | |
971de7fb | 2574 | build_frame_matrix (struct frame *f) |
5f5c8ee5 GM |
2575 | { |
2576 | int i; | |
2577 | ||
2578 | /* F must have a frame matrix when this function is called. */ | |
2579 | xassert (!FRAME_WINDOW_P (f)); | |
177c0ea7 | 2580 | |
5f5c8ee5 GM |
2581 | /* Clear all rows in the frame matrix covered by window matrices. |
2582 | Menu bar lines are not covered by windows. */ | |
2583 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2584 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2585 | ||
2586 | /* Build the matrix by walking the window tree. */ | |
2587 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2588 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2589 | } | |
2590 | ||
2591 | ||
2592 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2593 | matrices. W is the root of a window tree. */ | |
2594 | ||
2595 | static void | |
971de7fb | 2596 | build_frame_matrix_from_window_tree (struct glyph_matrix *matrix, struct window *w) |
5f5c8ee5 GM |
2597 | { |
2598 | while (w) | |
2599 | { | |
2600 | if (!NILP (w->hchild)) | |
2601 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->hchild)); | |
2602 | else if (!NILP (w->vchild)) | |
2603 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->vchild)); | |
2604 | else | |
2605 | build_frame_matrix_from_leaf_window (matrix, w); | |
2606 | ||
2607 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2608 | } | |
2609 | } | |
2610 | ||
2611 | ||
2612 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2613 | desired frame matrix built. W is a leaf window whose desired or | |
2614 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2615 | must_be_updated_p determines which matrix it contributes to | |
2616 | FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix | |
2617 | is added to FRAME_MATRIX, otherwise W's current matrix is added. | |
2618 | Adding a desired matrix means setting up used counters and such in | |
2619 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2620 | means copying glyphs. The latter case corresponds to | |
2621 | preserve_other_columns in the old redisplay. */ | |
2622 | ||
2623 | static void | |
971de7fb | 2624 | build_frame_matrix_from_leaf_window (struct glyph_matrix *frame_matrix, struct window *w) |
5f5c8ee5 GM |
2625 | { |
2626 | struct glyph_matrix *window_matrix; | |
2627 | int window_y, frame_y; | |
2628 | /* If non-zero, a glyph to insert at the right border of W. */ | |
3fc809e2 KS |
2629 | GLYPH right_border_glyph; |
2630 | ||
2631 | SET_GLYPH_FROM_CHAR (right_border_glyph, 0); | |
5f5c8ee5 GM |
2632 | |
2633 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2634 | if (w->must_be_updated_p) | |
2635 | { | |
2636 | window_matrix = w->desired_matrix; | |
2637 | ||
2638 | /* Decide whether we want to add a vertical border glyph. */ | |
2639 | if (!WINDOW_RIGHTMOST_P (w)) | |
2640 | { | |
2641 | struct Lisp_Char_Table *dp = window_display_table (w); | |
3fc809e2 | 2642 | Lisp_Object gc; |
b4e49aee | 2643 | |
3fc809e2 KS |
2644 | SET_GLYPH_FROM_CHAR (right_border_glyph, '|'); |
2645 | if (dp | |
2646 | && (gc = DISP_BORDER_GLYPH (dp), GLYPH_CODE_P (gc)) | |
2647 | && GLYPH_CODE_CHAR_VALID_P (gc)) | |
2648 | { | |
2649 | SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph, gc); | |
2650 | spec_glyph_lookup_face (w, &right_border_glyph); | |
2651 | } | |
b4e49aee | 2652 | |
3fc809e2 KS |
2653 | if (GLYPH_FACE (right_border_glyph) <= 0) |
2654 | SET_GLYPH_FACE (right_border_glyph, VERTICAL_BORDER_FACE_ID); | |
5f5c8ee5 GM |
2655 | } |
2656 | } | |
2657 | else | |
2658 | window_matrix = w->current_matrix; | |
2659 | ||
2660 | /* For all rows in the window matrix and corresponding rows in the | |
2661 | frame matrix. */ | |
2662 | window_y = 0; | |
2663 | frame_y = window_matrix->matrix_y; | |
2664 | while (window_y < window_matrix->nrows) | |
2665 | { | |
2666 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2667 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
2a8bd25f | 2668 | int current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2669 | |
2670 | /* Fill up the frame row with spaces up to the left margin of the | |
2671 | window row. */ | |
2672 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2673 | ||
2674 | /* Fill up areas in the window matrix row with spaces. */ | |
2675 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2676 | |
2677 | /* If only part of W's desired matrix has been built, and | |
2678 | window_row wasn't displayed, use the corresponding current | |
2679 | row instead. */ | |
2680 | if (window_matrix == w->desired_matrix | |
2681 | && !window_row->enabled_p) | |
2682 | { | |
2683 | window_row = w->current_matrix->rows + window_y; | |
2684 | current_row_p = 1; | |
2685 | } | |
177c0ea7 | 2686 | |
2a8bd25f | 2687 | if (current_row_p) |
5f5c8ee5 | 2688 | { |
2a8bd25f | 2689 | /* Copy window row to frame row. */ |
72af86bd AS |
2690 | memcpy (frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, |
2691 | window_row->glyphs[0], | |
2692 | window_matrix->matrix_w * sizeof (struct glyph)); | |
5f5c8ee5 GM |
2693 | } |
2694 | else | |
2695 | { | |
2a8bd25f | 2696 | xassert (window_row->enabled_p); |
177c0ea7 | 2697 | |
2a8bd25f GM |
2698 | /* Only when a desired row has been displayed, we want |
2699 | the corresponding frame row to be updated. */ | |
2700 | frame_row->enabled_p = 1; | |
177c0ea7 | 2701 | |
5f5c8ee5 GM |
2702 | /* Maybe insert a vertical border between horizontally adjacent |
2703 | windows. */ | |
3fc809e2 | 2704 | if (GLYPH_CHAR (right_border_glyph) != 0) |
5f5c8ee5 GM |
2705 | { |
2706 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2707 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2708 | } | |
2709 | ||
498c08ea | 2710 | #if GLYPH_DEBUG |
a13396c9 GM |
2711 | /* Window row window_y must be a slice of frame row |
2712 | frame_y. */ | |
5f5c8ee5 | 2713 | xassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2714 | |
5f5c8ee5 GM |
2715 | /* If rows are in sync, we don't have to copy glyphs because |
2716 | frame and window share glyphs. */ | |
177c0ea7 | 2717 | |
a38634ff | 2718 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2719 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2720 | #endif |
5f5c8ee5 GM |
2721 | } |
2722 | ||
2723 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2724 | up with spaces, and visit leaf windows from left to right it | |
2725 | can be done simply. */ | |
177c0ea7 | 2726 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2727 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2728 | ||
5f5c8ee5 GM |
2729 | /* Next row. */ |
2730 | ++window_y; | |
2731 | ++frame_y; | |
2732 | } | |
2733 | } | |
2734 | ||
5f81871e RS |
2735 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2736 | ID, return a glyph that has a realized face ID. | |
2737 | This is used for glyphs displayed specially and not part of the text; | |
2738 | for instance, vertical separators, truncation markers, etc. */ | |
2739 | ||
3fc809e2 | 2740 | void |
971de7fb | 2741 | spec_glyph_lookup_face (struct window *w, GLYPH *glyph) |
5f81871e | 2742 | { |
3fc809e2 | 2743 | int lface_id = GLYPH_FACE (*glyph); |
5f81871e RS |
2744 | /* Convert the glyph's specified face to a realized (cache) face. */ |
2745 | if (lface_id > 0) | |
2746 | { | |
2747 | int face_id = merge_faces (XFRAME (w->frame), | |
2748 | Qt, lface_id, DEFAULT_FACE_ID); | |
3fc809e2 | 2749 | SET_GLYPH_FACE (*glyph, face_id); |
5f81871e | 2750 | } |
5f81871e | 2751 | } |
5f5c8ee5 GM |
2752 | |
2753 | /* Add spaces to a glyph row ROW in a window matrix. | |
2754 | ||
2755 | Each row has the form: | |
2756 | ||
2757 | +---------+-----------------------------+------------+ | |
2758 | | left | text | right | | |
2759 | +---------+-----------------------------+------------+ | |
2760 | ||
2761 | Left and right marginal areas are optional. This function adds | |
2762 | spaces to areas so that there are no empty holes between areas. | |
2763 | In other words: If the right area is not empty, the text area | |
2764 | is filled up with spaces up to the right area. If the text area | |
2765 | is not empty, the left area is filled up. | |
2766 | ||
2767 | To be called for frame-based redisplay, only. */ | |
2768 | ||
2769 | static void | |
971de7fb | 2770 | fill_up_glyph_row_with_spaces (struct glyph_row *row) |
5f5c8ee5 GM |
2771 | { |
2772 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2773 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2774 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2775 | } | |
2776 | ||
2777 | ||
2778 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2779 | frame-based redisplay only. */ | |
2780 | ||
2781 | static void | |
971de7fb | 2782 | fill_up_glyph_row_area_with_spaces (struct glyph_row *row, int area) |
5f5c8ee5 GM |
2783 | { |
2784 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2785 | { | |
2786 | struct glyph *end = row->glyphs[area + 1]; | |
2787 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2788 | ||
2789 | while (text < end) | |
2790 | *text++ = space_glyph; | |
2791 | row->used[area] = text - row->glyphs[area]; | |
2792 | } | |
2793 | } | |
2794 | ||
2795 | ||
2796 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2797 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2798 | ||
2799 | static void | |
971de7fb | 2800 | fill_up_frame_row_with_spaces (struct glyph_row *row, int upto) |
5f5c8ee5 GM |
2801 | { |
2802 | int i = row->used[TEXT_AREA]; | |
2803 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2804 | |
5f5c8ee5 GM |
2805 | while (i < upto) |
2806 | glyph[i++] = space_glyph; | |
2807 | ||
2808 | row->used[TEXT_AREA] = i; | |
2809 | } | |
2810 | ||
2811 | ||
2812 | \f | |
2813 | /********************************************************************** | |
2814 | Mirroring operations on frame matrices in window matrices | |
2815 | **********************************************************************/ | |
2816 | ||
2817 | /* Set frame being updated via frame-based redisplay to F. This | |
2818 | function must be called before updates to make explicit that we are | |
2819 | working on frame matrices or not. */ | |
2820 | ||
2821 | static INLINE void | |
971de7fb | 2822 | set_frame_matrix_frame (struct frame *f) |
5f5c8ee5 GM |
2823 | { |
2824 | frame_matrix_frame = f; | |
2825 | } | |
2826 | ||
2827 | ||
2828 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2829 | DESIRED_MATRIX is the desired matrix corresponding to | |
2830 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2831 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2832 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2833 | done in frame matrices, and that we have to perform analogous | |
2834 | operations in window matrices of frame_matrix_frame. */ | |
2835 | ||
2836 | static INLINE void | |
971de7fb | 2837 | make_current (struct glyph_matrix *desired_matrix, struct glyph_matrix *current_matrix, int row) |
5f5c8ee5 GM |
2838 | { |
2839 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2840 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
e876ff42 | 2841 | int mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2842 | |
2843 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2844 | between both rows, and does a structure assignment otherwise. */ | |
2845 | assign_row (current_row, desired_row); | |
2846 | ||
2847 | /* Enable current_row to mark it as valid. */ | |
2848 | current_row->enabled_p = 1; | |
e876ff42 | 2849 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2850 | |
2851 | /* If we are called on frame matrices, perform analogous operations | |
2852 | for window matrices. */ | |
2853 | if (frame_matrix_frame) | |
2854 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); | |
2855 | } | |
2856 | ||
2857 | ||
2858 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2859 | W's frame which has been made current (by swapping pointers between | |
2860 | current and desired matrix). Perform analogous operations in the | |
2861 | matrices of leaf windows in the window tree rooted at W. */ | |
2862 | ||
2863 | static void | |
971de7fb | 2864 | mirror_make_current (struct window *w, int frame_row) |
5f5c8ee5 GM |
2865 | { |
2866 | while (w) | |
2867 | { | |
2868 | if (!NILP (w->hchild)) | |
2869 | mirror_make_current (XWINDOW (w->hchild), frame_row); | |
2870 | else if (!NILP (w->vchild)) | |
2871 | mirror_make_current (XWINDOW (w->vchild), frame_row); | |
2872 | else | |
2873 | { | |
2874 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2875 | here because the checks performed in debug mode there | |
2876 | will not allow the conversion. */ | |
2877 | int row = frame_row - w->desired_matrix->matrix_y; | |
2878 | ||
2879 | /* If FRAME_ROW is within W, assign the desired row to the | |
2880 | current row (exchanging glyph pointers). */ | |
2881 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
2882 | { | |
2883 | struct glyph_row *current_row | |
2884 | = MATRIX_ROW (w->current_matrix, row); | |
2885 | struct glyph_row *desired_row | |
2886 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
2887 | |
2888 | if (desired_row->enabled_p) | |
2889 | assign_row (current_row, desired_row); | |
2890 | else | |
2891 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 GM |
2892 | current_row->enabled_p = 1; |
2893 | } | |
2894 | } | |
177c0ea7 | 2895 | |
5f5c8ee5 GM |
2896 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2897 | } | |
2898 | } | |
2899 | ||
2900 | ||
2901 | /* Perform row dance after scrolling. We are working on the range of | |
2902 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
2903 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
2904 | row I in the range 0 <= I < NLINES, the index of the original line | |
2905 | to move to I. This index is relative to the row range, i.e. 0 <= | |
2906 | index < NLINES. RETAINED_P is a vector containing zero for each | |
2907 | row 0 <= I < NLINES which is empty. | |
2908 | ||
2909 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 2910 | |
5f5c8ee5 | 2911 | void |
6f704c76 DN |
2912 | mirrored_line_dance (struct glyph_matrix *matrix, int unchanged_at_top, int nlines, |
2913 | int *copy_from, char *retained_p) | |
5f5c8ee5 GM |
2914 | { |
2915 | /* A copy of original rows. */ | |
2916 | struct glyph_row *old_rows; | |
2917 | ||
2918 | /* Rows to assign to. */ | |
2919 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 2920 | |
5f5c8ee5 GM |
2921 | int i; |
2922 | ||
2923 | /* Make a copy of the original rows. */ | |
2924 | old_rows = (struct glyph_row *) alloca (nlines * sizeof *old_rows); | |
72af86bd | 2925 | memcpy (old_rows, new_rows, nlines * sizeof *old_rows); |
5f5c8ee5 GM |
2926 | |
2927 | /* Assign new rows, maybe clear lines. */ | |
2928 | for (i = 0; i < nlines; ++i) | |
2929 | { | |
2930 | int enabled_before_p = new_rows[i].enabled_p; | |
2931 | ||
2932 | xassert (i + unchanged_at_top < matrix->nrows); | |
2933 | xassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
2934 | new_rows[i] = old_rows[copy_from[i]]; | |
2935 | new_rows[i].enabled_p = enabled_before_p; | |
2936 | ||
2937 | /* RETAINED_P is zero for empty lines. */ | |
2938 | if (!retained_p[copy_from[i]]) | |
2939 | new_rows[i].enabled_p = 0; | |
2940 | } | |
2941 | ||
153a073c | 2942 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 GM |
2943 | if (frame_matrix_frame) |
2944 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), | |
2945 | unchanged_at_top, nlines, copy_from, retained_p); | |
2946 | } | |
2947 | ||
2948 | ||
a13396c9 | 2949 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 2950 | the current frame matrix. */ |
a13396c9 GM |
2951 | |
2952 | static void | |
971de7fb | 2953 | sync_window_with_frame_matrix_rows (struct window *w) |
a13396c9 GM |
2954 | { |
2955 | struct frame *f = XFRAME (w->frame); | |
2956 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
075c507b | 2957 | int left, right, x, width; |
a13396c9 | 2958 | |
5cb88111 | 2959 | /* Preconditions: W must be a leaf window on a tty frame. */ |
a13396c9 | 2960 | xassert (NILP (w->hchild) && NILP (w->vchild)); |
a13396c9 GM |
2961 | xassert (!FRAME_WINDOW_P (f)); |
2962 | ||
7df02016 KS |
2963 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
2964 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
2965 | x = w->current_matrix->matrix_x; |
2966 | width = w->current_matrix->matrix_w; | |
2967 | ||
a13396c9 GM |
2968 | window_row = w->current_matrix->rows; |
2969 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 2970 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 2971 | |
5cb88111 | 2972 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 2973 | { |
5cb88111 GM |
2974 | window_row->glyphs[LEFT_MARGIN_AREA] |
2975 | = frame_row->glyphs[0] + x; | |
2976 | window_row->glyphs[TEXT_AREA] | |
2977 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
2978 | window_row->glyphs[LAST_AREA] | |
2979 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
2980 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
2981 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
2982 | } |
2983 | } | |
2984 | ||
2985 | ||
2986 | /* Return the window in the window tree rooted in W containing frame | |
2987 | row ROW. Value is null if none is found. */ | |
2988 | ||
2989 | struct window * | |
971de7fb | 2990 | frame_row_to_window (struct window *w, int row) |
a13396c9 GM |
2991 | { |
2992 | struct window *found = NULL; | |
177c0ea7 | 2993 | |
a13396c9 GM |
2994 | while (w && !found) |
2995 | { | |
2996 | if (!NILP (w->hchild)) | |
2997 | found = frame_row_to_window (XWINDOW (w->hchild), row); | |
2998 | else if (!NILP (w->vchild)) | |
2999 | found = frame_row_to_window (XWINDOW (w->vchild), row); | |
7df02016 KS |
3000 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
3001 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 3002 | found = w; |
177c0ea7 | 3003 | |
a13396c9 GM |
3004 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3005 | } | |
3006 | ||
3007 | return found; | |
3008 | } | |
3009 | ||
3010 | ||
5f5c8ee5 GM |
3011 | /* Perform a line dance in the window tree rooted at W, after |
3012 | scrolling a frame matrix in mirrored_line_dance. | |
3013 | ||
3014 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
3015 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
3016 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
3017 | I < NLINES, the index of the original line to move to I. This | |
3018 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
3019 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
3020 | which is empty. */ | |
3021 | ||
3022 | static void | |
971de7fb | 3023 | mirror_line_dance (struct window *w, int unchanged_at_top, int nlines, int *copy_from, char *retained_p) |
5f5c8ee5 GM |
3024 | { |
3025 | while (w) | |
3026 | { | |
3027 | if (!NILP (w->hchild)) | |
3028 | mirror_line_dance (XWINDOW (w->hchild), unchanged_at_top, | |
3029 | nlines, copy_from, retained_p); | |
3030 | else if (!NILP (w->vchild)) | |
3031 | mirror_line_dance (XWINDOW (w->vchild), unchanged_at_top, | |
3032 | nlines, copy_from, retained_p); | |
3033 | else | |
3034 | { | |
3035 | /* W is a leaf window, and we are working on its current | |
3036 | matrix m. */ | |
3037 | struct glyph_matrix *m = w->current_matrix; | |
a13396c9 | 3038 | int i, sync_p = 0; |
5f5c8ee5 GM |
3039 | struct glyph_row *old_rows; |
3040 | ||
3041 | /* Make a copy of the original rows of matrix m. */ | |
3042 | old_rows = (struct glyph_row *) alloca (m->nrows * sizeof *old_rows); | |
72af86bd | 3043 | memcpy (old_rows, m->rows, m->nrows * sizeof *old_rows); |
5f5c8ee5 GM |
3044 | |
3045 | for (i = 0; i < nlines; ++i) | |
3046 | { | |
3047 | /* Frame relative line assigned to. */ | |
3048 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 3049 | |
5f5c8ee5 GM |
3050 | /* Frame relative line assigned. */ |
3051 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 3052 | |
5f5c8ee5 GM |
3053 | /* Window relative line assigned to. */ |
3054 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 3055 | |
5f5c8ee5 GM |
3056 | /* Window relative line assigned. */ |
3057 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 3058 | |
5f5c8ee5 GM |
3059 | /* Is assigned line inside window? */ |
3060 | int from_inside_window_p | |
3061 | = window_from >= 0 && window_from < m->matrix_h; | |
177c0ea7 | 3062 | |
a13396c9 GM |
3063 | /* Is assigned to line inside window? */ |
3064 | int to_inside_window_p | |
3065 | = window_to >= 0 && window_to < m->matrix_h; | |
177c0ea7 | 3066 | |
a13396c9 | 3067 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 3068 | { |
5f5c8ee5 GM |
3069 | /* Enabled setting before assignment. */ |
3070 | int enabled_before_p; | |
177c0ea7 | 3071 | |
5f5c8ee5 GM |
3072 | /* Do the assignment. The enabled_p flag is saved |
3073 | over the assignment because the old redisplay did | |
3074 | that. */ | |
3075 | enabled_before_p = m->rows[window_to].enabled_p; | |
3076 | m->rows[window_to] = old_rows[window_from]; | |
3077 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 3078 | |
5f5c8ee5 GM |
3079 | /* If frame line is empty, window line is empty, too. */ |
3080 | if (!retained_p[copy_from[i]]) | |
3081 | m->rows[window_to].enabled_p = 0; | |
3082 | } | |
a13396c9 GM |
3083 | else if (to_inside_window_p) |
3084 | { | |
3085 | /* A copy between windows. This is an infrequent | |
3086 | case not worth optimizing. */ | |
3087 | struct frame *f = XFRAME (w->frame); | |
3088 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); | |
3089 | struct window *w2; | |
3090 | struct glyph_matrix *m2; | |
3091 | int m2_from; | |
3092 | ||
fe8b8401 | 3093 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
3094 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
3095 | -nw', FROM_FRAME sometimes has no associated window. | |
3096 | This check avoids a segfault if W2 is null. */ | |
3097 | if (w2) | |
3098 | { | |
3099 | m2 = w2->current_matrix; | |
3100 | m2_from = frame_from - m2->matrix_y; | |
3101 | copy_row_except_pointers (m->rows + window_to, | |
3102 | m2->rows + m2_from); | |
3103 | ||
3104 | /* If frame line is empty, window line is empty, too. */ | |
3105 | if (!retained_p[copy_from[i]]) | |
3106 | m->rows[window_to].enabled_p = 0; | |
3107 | } | |
a13396c9 GM |
3108 | sync_p = 1; |
3109 | } | |
3110 | else if (from_inside_window_p) | |
3111 | sync_p = 1; | |
5f5c8ee5 | 3112 | } |
a13396c9 GM |
3113 | |
3114 | /* If there was a copy between windows, make sure glyph | |
3115 | pointers are in sync with the frame matrix. */ | |
3116 | if (sync_p) | |
3117 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 3118 | |
5f5c8ee5 GM |
3119 | /* Check that no pointers are lost. */ |
3120 | CHECK_MATRIX (m); | |
3121 | } | |
3122 | ||
3123 | /* Next window on same level. */ | |
3124 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3125 | } | |
3126 | } | |
3127 | ||
3128 | ||
3129 | #if GLYPH_DEBUG | |
3130 | ||
3131 | /* Check that window and frame matrices agree about their | |
3132 | understanding where glyphs of the rows are to find. For each | |
3133 | window in the window tree rooted at W, check that rows in the | |
3134 | matrices of leaf window agree with their frame matrices about | |
3135 | glyph pointers. */ | |
3136 | ||
3137 | void | |
3138 | check_window_matrix_pointers (w) | |
3139 | struct window *w; | |
3140 | { | |
3141 | while (w) | |
3142 | { | |
3143 | if (!NILP (w->hchild)) | |
3144 | check_window_matrix_pointers (XWINDOW (w->hchild)); | |
3145 | else if (!NILP (w->vchild)) | |
3146 | check_window_matrix_pointers (XWINDOW (w->vchild)); | |
3147 | else | |
60a8948a | 3148 | { |
5f5c8ee5 GM |
3149 | struct frame *f = XFRAME (w->frame); |
3150 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); | |
3151 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 3152 | } |
177c0ea7 | 3153 | |
5f5c8ee5 GM |
3154 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3155 | } | |
3156 | } | |
3157 | ||
3158 | ||
3159 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
3160 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
3161 | each row in WINDOW_MATRIX check that it's a slice of the | |
3162 | corresponding frame row. If it isn't, abort. */ | |
3163 | ||
3164 | static void | |
3165 | check_matrix_pointers (window_matrix, frame_matrix) | |
3166 | struct glyph_matrix *window_matrix, *frame_matrix; | |
3167 | { | |
3168 | /* Row number in WINDOW_MATRIX. */ | |
3169 | int i = 0; | |
3170 | ||
3171 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
3172 | int j = window_matrix->matrix_y; | |
3173 | ||
177c0ea7 | 3174 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
3175 | slice of the row in the frame matrix. If it isn't we didn't |
3176 | mirror an operation on the frame matrix correctly. */ | |
3177 | while (i < window_matrix->nrows) | |
3178 | { | |
3179 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
3180 | frame_matrix->rows + j)) | |
3181 | abort (); | |
3182 | ++i, ++j; | |
3183 | } | |
3184 | } | |
3185 | ||
3186 | #endif /* GLYPH_DEBUG != 0 */ | |
3187 | ||
3188 | ||
3189 | \f | |
3190 | /********************************************************************** | |
3191 | VPOS and HPOS translations | |
3192 | **********************************************************************/ | |
3193 | ||
3194 | #if GLYPH_DEBUG | |
3195 | ||
3196 | /* Translate vertical position VPOS which is relative to window W to a | |
3197 | vertical position relative to W's frame. */ | |
3198 | ||
3199 | static int | |
3200 | window_to_frame_vpos (w, vpos) | |
3201 | struct window *w; | |
3202 | int vpos; | |
3203 | { | |
3204 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 3205 | |
5f5c8ee5 GM |
3206 | xassert (!FRAME_WINDOW_P (f)); |
3207 | xassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); | |
7df02016 KS |
3208 | vpos += WINDOW_TOP_EDGE_LINE (w); |
3209 | xassert (vpos >= 0 && vpos <= FRAME_LINES (f)); | |
5f5c8ee5 GM |
3210 | return vpos; |
3211 | } | |
3212 | ||
3213 | ||
3214 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 3215 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
3216 | |
3217 | static int | |
3218 | window_to_frame_hpos (w, hpos) | |
3219 | struct window *w; | |
3220 | int hpos; | |
3221 | { | |
82f4a138 | 3222 | xassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 3223 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
3224 | return hpos; |
3225 | } | |
177c0ea7 | 3226 | |
5f5c8ee5 GM |
3227 | #endif /* GLYPH_DEBUG */ |
3228 | ||
3229 | ||
3230 | \f | |
3231 | /********************************************************************** | |
3232 | Redrawing Frames | |
3233 | **********************************************************************/ | |
3234 | ||
3235 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, | |
7ee72033 | 3236 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. */) |
5842a27b | 3237 | (Lisp_Object frame) |
5f5c8ee5 GM |
3238 | { |
3239 | struct frame *f; | |
3240 | ||
b7826503 | 3241 | CHECK_LIVE_FRAME (frame); |
5f5c8ee5 GM |
3242 | f = XFRAME (frame); |
3243 | ||
3244 | /* Ignore redraw requests, if frame has no glyphs yet. | |
3245 | (Implementation note: It still has to be checked why we are | |
3246 | called so early here). */ | |
3247 | if (!glyphs_initialized_initially_p) | |
3248 | return Qnil; | |
3249 | ||
3250 | update_begin (f); | |
3224dac1 | 3251 | #ifdef MSDOS |
f2adda5e | 3252 | if (FRAME_MSDOS_P (f)) |
79d39b69 | 3253 | FRAME_TERMINAL (f)->set_terminal_modes_hook (FRAME_TERMINAL (f)); |
3224dac1 | 3254 | #endif |
385ed61f | 3255 | clear_frame (f); |
5f5c8ee5 GM |
3256 | clear_current_matrices (f); |
3257 | update_end (f); | |
daf01701 | 3258 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3259 | fflush (FRAME_TTY (f)->output); |
5f5c8ee5 GM |
3260 | windows_or_buffers_changed++; |
3261 | /* Mark all windows as inaccurate, so that every window will have | |
3262 | its redisplay done. */ | |
3263 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
3264 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
3265 | f->garbaged = 0; | |
3266 | return Qnil; | |
3267 | } | |
3268 | ||
3269 | ||
3270 | /* Redraw frame F. This is nothing more than a call to the Lisp | |
3271 | function redraw-frame. */ | |
3272 | ||
3273 | void | |
971de7fb | 3274 | redraw_frame (struct frame *f) |
5f5c8ee5 GM |
3275 | { |
3276 | Lisp_Object frame; | |
3277 | XSETFRAME (frame, f); | |
3278 | Fredraw_frame (frame); | |
3279 | } | |
3280 | ||
3281 | ||
3282 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
7ee72033 | 3283 | doc: /* Clear and redisplay all visible frames. */) |
5842a27b | 3284 | (void) |
5f5c8ee5 GM |
3285 | { |
3286 | Lisp_Object tail, frame; | |
3287 | ||
3288 | FOR_EACH_FRAME (tail, frame) | |
3289 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
3290 | Fredraw_frame (frame); | |
3291 | ||
3292 | return Qnil; | |
3293 | } | |
3294 | ||
3295 | ||
3296 | /* This is used when frame_garbaged is set. Call Fredraw_frame on all | |
3297 | visible frames marked as garbaged. */ | |
3298 | ||
3299 | void | |
971de7fb | 3300 | redraw_garbaged_frames (void) |
5f5c8ee5 GM |
3301 | { |
3302 | Lisp_Object tail, frame; | |
3303 | ||
3304 | FOR_EACH_FRAME (tail, frame) | |
3305 | if (FRAME_VISIBLE_P (XFRAME (frame)) | |
3306 | && FRAME_GARBAGED_P (XFRAME (frame))) | |
3307 | Fredraw_frame (frame); | |
3308 | } | |
3309 | ||
3310 | ||
3311 | \f | |
5f5c8ee5 GM |
3312 | /*********************************************************************** |
3313 | Frame Update | |
3314 | ***********************************************************************/ | |
4588ec20 | 3315 | |
5f5c8ee5 | 3316 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 3317 | |
5f5c8ee5 GM |
3318 | If FORCE_P is non-zero, don't let redisplay be stopped by detecting |
3319 | pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try | |
3320 | scrolling. | |
177c0ea7 | 3321 | |
5f5c8ee5 | 3322 | Value is non-zero if redisplay was stopped due to pending input. */ |
4588ec20 | 3323 | |
5f5c8ee5 | 3324 | int |
971de7fb | 3325 | update_frame (struct frame *f, int force_p, int inhibit_hairy_id_p) |
5f5c8ee5 GM |
3326 | { |
3327 | /* 1 means display has been paused because of pending input. */ | |
3328 | int paused_p; | |
3329 | struct window *root_window = XWINDOW (f->root_window); | |
3330 | ||
a2130dbb KS |
3331 | if (redisplay_dont_pause) |
3332 | force_p = 1; | |
d012c62b | 3333 | #if PERIODIC_PREEMPTION_CHECKING |
a2130dbb KS |
3334 | else if (NILP (Vredisplay_preemption_period)) |
3335 | force_p = 1; | |
3336 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
3337 | { |
3338 | EMACS_TIME tm; | |
3339 | double p = XFLOATINT (Vredisplay_preemption_period); | |
3340 | int sec, usec; | |
3341 | ||
993d4ab6 KS |
3342 | if (detect_input_pending_ignore_squeezables ()) |
3343 | { | |
3344 | paused_p = 1; | |
3345 | goto do_pause; | |
3346 | } | |
3347 | ||
d012c62b KS |
3348 | sec = (int) p; |
3349 | usec = (p - sec) * 1000000; | |
3350 | ||
3351 | EMACS_GET_TIME (tm); | |
3352 | EMACS_SET_SECS_USECS (preemption_period, sec, usec); | |
3353 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
3354 | } | |
3355 | #endif | |
3356 | ||
5f5c8ee5 | 3357 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3358 | { |
5f5c8ee5 GM |
3359 | /* We are working on window matrix basis. All windows whose |
3360 | flag must_be_updated_p is set have to be updated. */ | |
3361 | ||
3362 | /* Record that we are not working on frame matrices. */ | |
3363 | set_frame_matrix_frame (NULL); | |
3364 | ||
3365 | /* Update all windows in the window tree of F, maybe stopping | |
3366 | when pending input is detected. */ | |
3367 | update_begin (f); | |
3368 | ||
3369 | /* Update the menu bar on X frames that don't have toolkit | |
3370 | support. */ | |
3371 | if (WINDOWP (f->menu_bar_window)) | |
3372 | update_window (XWINDOW (f->menu_bar_window), 1); | |
3373 | ||
3374 | /* Update the tool-bar window, if present. */ | |
9ea173e8 | 3375 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3376 | { |
9ea173e8 | 3377 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3378 | |
3379 | /* Update tool-bar window. */ | |
3380 | if (w->must_be_updated_p) | |
4588ec20 | 3381 | { |
153a073c PJ |
3382 | Lisp_Object tem; |
3383 | ||
5f5c8ee5 GM |
3384 | update_window (w, 1); |
3385 | w->must_be_updated_p = 0; | |
3386 | ||
3387 | /* Swap tool-bar strings. We swap because we want to | |
3388 | reuse strings. */ | |
9ea173e8 GM |
3389 | tem = f->current_tool_bar_string; |
3390 | f->current_tool_bar_string = f->desired_tool_bar_string; | |
3391 | f->desired_tool_bar_string = tem; | |
4588ec20 JB |
3392 | } |
3393 | } | |
177c0ea7 | 3394 | |
5f5c8ee5 GM |
3395 | |
3396 | /* Update windows. */ | |
3397 | paused_p = update_window_tree (root_window, force_p); | |
3398 | update_end (f); | |
177c0ea7 | 3399 | |
6b61353c | 3400 | /* This flush is a performance bottleneck under X, |
e581a466 | 3401 | and it doesn't seem to be necessary anyway (in general). |
6b61353c | 3402 | It is necessary when resizing the window with the mouse, or |
e581a466 | 3403 | at least the fringes are not redrawn in a timely manner. ++kfs */ |
6b61353c | 3404 | if (f->force_flush_display_p) |
e581a466 KL |
3405 | { |
3406 | FRAME_RIF (f)->flush_display (f); | |
3407 | f->force_flush_display_p = 0; | |
3408 | } | |
4588ec20 | 3409 | } |
5f5c8ee5 GM |
3410 | else |
3411 | { | |
3412 | /* We are working on frame matrix basis. Set the frame on whose | |
3413 | frame matrix we operate. */ | |
3414 | set_frame_matrix_frame (f); | |
3415 | ||
868dd24b | 3416 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3417 | build_frame_matrix (f); |
177c0ea7 | 3418 | |
868dd24b GM |
3419 | /* Update the display */ |
3420 | update_begin (f); | |
5f5c8ee5 | 3421 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3422 | update_end (f); |
3423 | ||
7d2f1216 | 3424 | if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f)) |
3224dac1 | 3425 | { |
0b0d3e0b KL |
3426 | if (FRAME_TTY (f)->termscript) |
3427 | fflush (FRAME_TTY (f)->termscript); | |
7d2f1216 EZ |
3428 | if (FRAME_TERMCAP_P (f)) |
3429 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3430 | } |
868dd24b | 3431 | |
5f5c8ee5 | 3432 | /* Check window matrices for lost pointers. */ |
2d5912c1 | 3433 | #if GLYPH_DEBUG |
9b0e97aa GM |
3434 | check_window_matrix_pointers (root_window); |
3435 | add_frame_display_history (f, paused_p); | |
3436 | #endif | |
5f5c8ee5 GM |
3437 | } |
3438 | ||
993d4ab6 | 3439 | do_pause: |
5f5c8ee5 GM |
3440 | /* Reset flags indicating that a window should be updated. */ |
3441 | set_window_update_flags (root_window, 0); | |
177c0ea7 | 3442 | |
868dd24b | 3443 | display_completed = !paused_p; |
5f5c8ee5 | 3444 | return paused_p; |
4588ec20 | 3445 | } |
5f5c8ee5 GM |
3446 | |
3447 | ||
4588ec20 | 3448 | \f |
5f5c8ee5 GM |
3449 | /************************************************************************ |
3450 | Window-based updates | |
3451 | ************************************************************************/ | |
3452 | ||
3453 | /* Perform updates in window tree rooted at W. FORCE_P non-zero means | |
3454 | don't stop updating when input is pending. */ | |
3455 | ||
3456 | static int | |
971de7fb | 3457 | update_window_tree (struct window *w, int force_p) |
5f5c8ee5 GM |
3458 | { |
3459 | int paused_p = 0; | |
177c0ea7 | 3460 | |
5f5c8ee5 GM |
3461 | while (w && !paused_p) |
3462 | { | |
3463 | if (!NILP (w->hchild)) | |
3464 | paused_p |= update_window_tree (XWINDOW (w->hchild), force_p); | |
3465 | else if (!NILP (w->vchild)) | |
3466 | paused_p |= update_window_tree (XWINDOW (w->vchild), force_p); | |
3467 | else if (w->must_be_updated_p) | |
3468 | paused_p |= update_window (w, force_p); | |
3469 | ||
3470 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3471 | } | |
3472 | ||
3473 | return paused_p; | |
3474 | } | |
3475 | ||
3476 | ||
3477 | /* Update window W if its flag must_be_updated_p is non-zero. If | |
3478 | FORCE_P is non-zero, don't stop updating if input is pending. */ | |
3479 | ||
3480 | void | |
971de7fb | 3481 | update_single_window (struct window *w, int force_p) |
5f5c8ee5 GM |
3482 | { |
3483 | if (w->must_be_updated_p) | |
3484 | { | |
3485 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
3486 | ||
3487 | /* Record that this is not a frame-based redisplay. */ | |
3488 | set_frame_matrix_frame (NULL); | |
3489 | ||
a2130dbb KS |
3490 | if (redisplay_dont_pause) |
3491 | force_p = 1; | |
d012c62b | 3492 | #if PERIODIC_PREEMPTION_CHECKING |
a2130dbb KS |
3493 | else if (NILP (Vredisplay_preemption_period)) |
3494 | force_p = 1; | |
3495 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
3496 | { |
3497 | EMACS_TIME tm; | |
3498 | double p = XFLOATINT (Vredisplay_preemption_period); | |
3499 | int sec, usec; | |
3500 | ||
3501 | sec = (int) p; | |
3502 | usec = (p - sec) * 1000000; | |
3503 | ||
3504 | EMACS_GET_TIME (tm); | |
3505 | EMACS_SET_SECS_USECS (preemption_period, sec, usec); | |
3506 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
3507 | } | |
3508 | #endif | |
3509 | ||
5f5c8ee5 GM |
3510 | /* Update W. */ |
3511 | update_begin (f); | |
3512 | update_window (w, force_p); | |
3513 | update_end (f); | |
4588ec20 | 3514 | |
5f5c8ee5 GM |
3515 | /* Reset flag in W. */ |
3516 | w->must_be_updated_p = 0; | |
3517 | } | |
3518 | } | |
4588ec20 | 3519 | |
93e023fc | 3520 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 3521 | |
408f5064 GM |
3522 | /* Redraw lines from the current matrix of window W that are |
3523 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
3524 | ||
3525 | static void | |
971de7fb | 3526 | redraw_overlapped_rows (struct window *w, int yb) |
408f5064 | 3527 | { |
d8ee7803 | 3528 | int i; |
fa971ac3 | 3529 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3fc809e2 | 3530 | |
408f5064 GM |
3531 | /* If rows overlapping others have been changed, the rows being |
3532 | overlapped have to be redrawn. This won't draw lines that have | |
3533 | already been drawn in update_window_line because overlapped_p in | |
3534 | desired rows is 0, so after row assignment overlapped_p in | |
3535 | current rows is 0. */ | |
3536 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
3537 | { | |
e876ff42 | 3538 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
3539 | |
3540 | if (!row->enabled_p) | |
3541 | break; | |
3542 | else if (row->mode_line_p) | |
3543 | continue; | |
177c0ea7 | 3544 | |
408f5064 GM |
3545 | if (row->overlapped_p) |
3546 | { | |
3547 | enum glyph_row_area area; | |
177c0ea7 | 3548 | |
408f5064 GM |
3549 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
3550 | { | |
3551 | updated_row = row; | |
3552 | updated_area = area; | |
fa971ac3 KL |
3553 | FRAME_RIF (f)->cursor_to (i, 0, row->y, |
3554 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 3555 | if (row->used[area]) |
fa971ac3 KL |
3556 | FRAME_RIF (f)->write_glyphs (row->glyphs[area], |
3557 | row->used[area]); | |
3558 | FRAME_RIF (f)->clear_end_of_line (-1); | |
408f5064 | 3559 | } |
177c0ea7 | 3560 | |
408f5064 GM |
3561 | row->overlapped_p = 0; |
3562 | } | |
3563 | ||
e876ff42 | 3564 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
3565 | break; |
3566 | } | |
3567 | } | |
3568 | ||
3569 | ||
3570 | /* Redraw lines from the current matrix of window W that overlap | |
3571 | others. YB is bottom-most y-position in W. */ | |
3572 | ||
3573 | static void | |
971de7fb | 3574 | redraw_overlapping_rows (struct window *w, int yb) |
408f5064 GM |
3575 | { |
3576 | int i, bottom_y; | |
3577 | struct glyph_row *row; | |
fa971ac3 | 3578 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
3fc809e2 | 3579 | |
408f5064 GM |
3580 | for (i = 0; i < w->current_matrix->nrows; ++i) |
3581 | { | |
3582 | row = w->current_matrix->rows + i; | |
3583 | ||
3584 | if (!row->enabled_p) | |
3585 | break; | |
3586 | else if (row->mode_line_p) | |
3587 | continue; | |
177c0ea7 | 3588 | |
408f5064 GM |
3589 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
3590 | ||
b4b2c2ca | 3591 | if (row->overlapping_p) |
408f5064 | 3592 | { |
41124e06 YM |
3593 | int overlaps = 0; |
3594 | ||
b4b2c2ca | 3595 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) && i > 0 |
41124e06 YM |
3596 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) |
3597 | overlaps |= OVERLAPS_PRED; | |
b4b2c2ca | 3598 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) && bottom_y < yb |
41124e06 YM |
3599 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) |
3600 | overlaps |= OVERLAPS_SUCC; | |
3601 | ||
3602 | if (overlaps) | |
3603 | { | |
3604 | if (row->used[LEFT_MARGIN_AREA]) | |
3605 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
3606 | ||
3607 | if (row->used[TEXT_AREA]) | |
3608 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
3609 | ||
3610 | if (row->used[RIGHT_MARGIN_AREA]) | |
3611 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
3612 | ||
3613 | /* Record in neighbour rows that ROW overwrites part of | |
3614 | their display. */ | |
3615 | if (overlaps & OVERLAPS_PRED) | |
3616 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
3617 | if (overlaps & OVERLAPS_SUCC) | |
3618 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
3619 | } | |
408f5064 GM |
3620 | } |
3621 | ||
3622 | if (bottom_y >= yb) | |
3623 | break; | |
3624 | } | |
3625 | } | |
3626 | ||
93e023fc KS |
3627 | #endif /* HAVE_WINDOW_SYSTEM */ |
3628 | ||
408f5064 | 3629 | |
93962bfa GM |
3630 | #ifdef GLYPH_DEBUG |
3631 | ||
3632 | /* Check that no row in the current matrix of window W is enabled | |
3633 | which is below what's displayed in the window. */ | |
3634 | ||
3635 | void | |
971de7fb | 3636 | check_current_matrix_flags (struct window *w) |
93962bfa GM |
3637 | { |
3638 | int last_seen_p = 0; | |
3639 | int i, yb = window_text_bottom_y (w); | |
3640 | ||
3641 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
3642 | { | |
3643 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
3644 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3645 | last_seen_p = 1; | |
3646 | else if (last_seen_p && row->enabled_p) | |
3647 | abort (); | |
3648 | } | |
3649 | } | |
3650 | ||
3651 | #endif /* GLYPH_DEBUG */ | |
3652 | ||
3653 | ||
5f5c8ee5 GM |
3654 | /* Update display of window W. FORCE_P non-zero means that we should |
3655 | not stop when detecting pending input. */ | |
3656 | ||
3657 | static int | |
971de7fb | 3658 | update_window (struct window *w, int force_p) |
4588ec20 | 3659 | { |
5f5c8ee5 GM |
3660 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
3661 | int paused_p; | |
d012c62b | 3662 | #if !PERIODIC_PREEMPTION_CHECKING |
5f5c8ee5 | 3663 | int preempt_count = baud_rate / 2400 + 1; |
d012c62b | 3664 | #endif |
597cfb3f | 3665 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
b96fd3e8 | 3666 | #if GLYPH_DEBUG |
5f5c8ee5 | 3667 | /* Check that W's frame doesn't have glyph matrices. */ |
82f4a138 | 3668 | xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 3669 | #endif |
5f5c8ee5 GM |
3670 | |
3671 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb KS |
3672 | #if !PERIODIC_PREEMPTION_CHECKING |
3673 | if (!force_p) | |
a2d5fca0 | 3674 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3675 | #endif |
4588ec20 | 3676 | |
5f5c8ee5 GM |
3677 | /* If forced to complete the update, or if no input is pending, do |
3678 | the update. */ | |
8fd9a666 | 3679 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 3680 | { |
5f5c8ee5 GM |
3681 | struct glyph_row *row, *end; |
3682 | struct glyph_row *mode_line_row; | |
56974e03 | 3683 | struct glyph_row *header_line_row; |
e87b8809 | 3684 | int yb, changed_p = 0, mouse_face_overwritten_p = 0, n_updated; |
5f5c8ee5 GM |
3685 | |
3686 | rif->update_window_begin_hook (w); | |
3687 | yb = window_text_bottom_y (w); | |
3688 | ||
153a073c PJ |
3689 | /* If window has a header line, update it before everything else. |
3690 | Adjust y-positions of other rows by the header line height. */ | |
5f5c8ee5 GM |
3691 | row = desired_matrix->rows; |
3692 | end = row + desired_matrix->nrows - 1; | |
177c0ea7 | 3693 | |
5f5c8ee5 | 3694 | if (row->mode_line_p) |
56974e03 GM |
3695 | { |
3696 | header_line_row = row; | |
3697 | ++row; | |
3698 | } | |
3699 | else | |
3700 | header_line_row = NULL; | |
5f5c8ee5 GM |
3701 | |
3702 | /* Update the mode line, if necessary. */ | |
3703 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
3704 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
3705 | { | |
3706 | mode_line_row->y = yb; | |
3707 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
3708 | desired_matrix), |
3709 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3710 | } |
3711 | ||
3712 | /* Find first enabled row. Optimizations in redisplay_internal | |
3713 | may lead to an update with only one row enabled. There may | |
3714 | be also completely empty matrices. */ | |
3715 | while (row < end && !row->enabled_p) | |
3716 | ++row; | |
177c0ea7 | 3717 | |
bfdcafe1 | 3718 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 3719 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
3720 | { |
3721 | int rc = scrolling_window (w, header_line_row != NULL); | |
3722 | if (rc < 0) | |
3723 | { | |
3724 | /* All rows were found to be equal. */ | |
3725 | paused_p = 0; | |
3726 | goto set_cursor; | |
3727 | } | |
3728 | else if (rc > 0) | |
6b61353c KH |
3729 | { |
3730 | /* We've scrolled the display. */ | |
3731 | force_p = 1; | |
3732 | changed_p = 1; | |
3733 | } | |
5f5c8ee5 GM |
3734 | } |
3735 | ||
3736 | /* Update the rest of the lines. */ | |
e87b8809 | 3737 | for (n_updated = 0; row < end && (force_p || !input_pending); ++row) |
b7412313 | 3738 | if (row->enabled_p) |
5f5c8ee5 GM |
3739 | { |
3740 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
3741 | int i; | |
177c0ea7 | 3742 | |
153a073c | 3743 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
3744 | detect_input_pending. If it's done too often, |
3745 | scrolling large windows with repeated scroll-up | |
3746 | commands will too quickly pause redisplay. */ | |
d012c62b KS |
3747 | #if PERIODIC_PREEMPTION_CHECKING |
3748 | if (!force_p) | |
3749 | { | |
3750 | EMACS_TIME tm, dif; | |
3751 | EMACS_GET_TIME (tm); | |
3752 | EMACS_SUB_TIME (dif, preemption_next_check, tm); | |
3753 | if (EMACS_TIME_NEG_P (dif)) | |
3754 | { | |
3755 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
3756 | if (detect_input_pending_ignore_squeezables ()) |
3757 | break; | |
d012c62b KS |
3758 | } |
3759 | } | |
3760 | #else | |
e87b8809 | 3761 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 3762 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3763 | #endif |
e876ff42 GM |
3764 | changed_p |= update_window_line (w, vpos, |
3765 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3766 | |
3767 | /* Mark all rows below the last visible one in the current | |
3768 | matrix as invalid. This is necessary because of | |
3769 | variable line heights. Consider the case of three | |
3770 | successive redisplays, where the first displays 5 | |
3771 | lines, the second 3 lines, and the third 5 lines again. | |
3772 | If the second redisplay wouldn't mark rows in the | |
3773 | current matrix invalid, the third redisplay might be | |
3774 | tempted to optimize redisplay based on lines displayed | |
3775 | in the first redisplay. */ | |
3776 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3777 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
3778 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
3779 | } | |
3780 | ||
3781 | /* Was display preempted? */ | |
3782 | paused_p = row < end; | |
177c0ea7 | 3783 | |
56974e03 | 3784 | set_cursor: |
177c0ea7 | 3785 | |
6b61353c KH |
3786 | /* Update the header line after scrolling because a new header |
3787 | line would otherwise overwrite lines at the top of the window | |
3788 | that can be scrolled. */ | |
3789 | if (header_line_row && header_line_row->enabled_p) | |
3790 | { | |
3791 | header_line_row->y = 0; | |
3792 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
6b61353c KH |
3793 | } |
3794 | ||
153a073c | 3795 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
3796 | if (!paused_p && !w->pseudo_window_p) |
3797 | { | |
93e023fc | 3798 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
3799 | if (changed_p && rif->fix_overlapping_area) |
3800 | { | |
3801 | redraw_overlapped_rows (w, yb); | |
3802 | redraw_overlapping_rows (w, yb); | |
3803 | } | |
93e023fc | 3804 | #endif |
177c0ea7 | 3805 | |
5f5c8ee5 GM |
3806 | /* Make cursor visible at cursor position of W. */ |
3807 | set_window_cursor_after_update (w); | |
3808 | ||
e876ff42 GM |
3809 | #if 0 /* Check that current matrix invariants are satisfied. This is |
3810 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
3811 | IF_DEBUG (check_matrix_invariants (w)); |
3812 | #endif | |
4588ec20 | 3813 | } |
5f5c8ee5 GM |
3814 | |
3815 | #if GLYPH_DEBUG | |
3816 | /* Remember the redisplay method used to display the matrix. */ | |
3817 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
3818 | #endif | |
408f5064 | 3819 | |
6b61353c KH |
3820 | #ifdef HAVE_WINDOW_SYSTEM |
3821 | update_window_fringes (w, 0); | |
3822 | #endif | |
3823 | ||
56974e03 GM |
3824 | /* End the update of window W. Don't set the cursor if we |
3825 | paused updating the display because in this case, | |
3826 | set_window_cursor_after_update hasn't been called, and | |
3827 | output_cursor doesn't contain the cursor location. */ | |
3828 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); | |
4588ec20 | 3829 | } |
5f5c8ee5 GM |
3830 | else |
3831 | paused_p = 1; | |
3832 | ||
2d5912c1 | 3833 | #if GLYPH_DEBUG |
0cffd9d8 | 3834 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
3835 | add_window_display_history (w, w->current_matrix->method, paused_p); |
3836 | #endif | |
177c0ea7 | 3837 | |
5f5c8ee5 | 3838 | clear_glyph_matrix (desired_matrix); |
408f5064 | 3839 | |
5f5c8ee5 | 3840 | return paused_p; |
4588ec20 JB |
3841 | } |
3842 | ||
b64b3980 | 3843 | |
5f5c8ee5 GM |
3844 | /* Update the display of area AREA in window W, row number VPOS. |
3845 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
3846 | ||
3847 | static void | |
971de7fb | 3848 | update_marginal_area (struct window *w, int area, int vpos) |
b64b3980 | 3849 | { |
5f5c8ee5 | 3850 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 3851 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
3852 | |
3853 | /* Let functions in xterm.c know what area subsequent X positions | |
3854 | will be relative to. */ | |
3855 | updated_area = area; | |
3856 | ||
3857 | /* Set cursor to start of glyphs, write them, and clear to the end | |
3858 | of the area. I don't think that something more sophisticated is | |
3859 | necessary here, since marginal areas will not be the default. */ | |
3860 | rif->cursor_to (vpos, 0, desired_row->y, 0); | |
3861 | if (desired_row->used[area]) | |
3862 | rif->write_glyphs (desired_row->glyphs[area], desired_row->used[area]); | |
3863 | rif->clear_end_of_line (-1); | |
b64b3980 | 3864 | } |
23b0200c | 3865 | |
352f1545 | 3866 | |
408f5064 GM |
3867 | /* Update the display of the text area of row VPOS in window W. |
3868 | Value is non-zero if display has changed. */ | |
5f5c8ee5 | 3869 | |
408f5064 | 3870 | static int |
971de7fb | 3871 | update_text_area (struct window *w, int vpos) |
23b0200c | 3872 | { |
5f5c8ee5 GM |
3873 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
3874 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3875 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 3876 | int changed_p = 0; |
5f5c8ee5 GM |
3877 | |
3878 | /* Let functions in xterm.c know what area subsequent X positions | |
3879 | will be relative to. */ | |
3880 | updated_area = TEXT_AREA; | |
177c0ea7 | 3881 | |
5f5c8ee5 GM |
3882 | /* If rows are at different X or Y, or rows have different height, |
3883 | or the current row is marked invalid, write the entire line. */ | |
3884 | if (!current_row->enabled_p | |
3885 | || desired_row->y != current_row->y | |
3886 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
3887 | || desired_row->phys_ascent != current_row->phys_ascent |
3888 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 3889 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 3890 | || current_row->overlapped_p |
fee8b690 CY |
3891 | /* This next line is necessary for correctly redrawing |
3892 | mouse-face areas after scrolling and other operations. | |
3893 | However, it causes excessive flickering when mouse is moved | |
3894 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
3895 | line doesn't seem to hurt anything. -- cyd. |
3896 | But it is still needed for the header line. -- kfs. */ | |
3897 | || (current_row->mouse_face_p | |
3898 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
3899 | || current_row->x != desired_row->x) |
3900 | { | |
3901 | rif->cursor_to (vpos, 0, desired_row->y, desired_row->x); | |
177c0ea7 | 3902 | |
5f5c8ee5 GM |
3903 | if (desired_row->used[TEXT_AREA]) |
3904 | rif->write_glyphs (desired_row->glyphs[TEXT_AREA], | |
3905 | desired_row->used[TEXT_AREA]); | |
177c0ea7 | 3906 | |
5f5c8ee5 GM |
3907 | /* Clear to end of window. */ |
3908 | rif->clear_end_of_line (-1); | |
408f5064 | 3909 | changed_p = 1; |
60f2f3f1 GM |
3910 | |
3911 | /* This erases the cursor. We do this here because | |
3912 | notice_overwritten_cursor cannot easily check this, which | |
3913 | might indicate that the whole functionality of | |
3914 | notice_overwritten_cursor would better be implemented here. | |
3915 | On the other hand, we need notice_overwritten_cursor as long | |
3916 | as mouse highlighting is done asynchronously outside of | |
3917 | redisplay. */ | |
3918 | if (vpos == w->phys_cursor.vpos) | |
3919 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
3920 | } |
3921 | else | |
3922 | { | |
3923 | int stop, i, x; | |
3924 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
3925 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
e47306e6 | 3926 | int overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 3927 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
91d227d9 | 3928 | int abort_skipping = 0; |
5f5c8ee5 | 3929 | |
78897758 YM |
3930 | /* If the desired row extends its face to the text area end, and |
3931 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
3932 | make sure we write at least one glyph, so that the face |
3933 | extension actually takes place. */ | |
78897758 YM |
3934 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
3935 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
3936 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
3937 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 3938 | --desired_stop_pos; |
177c0ea7 | 3939 | |
5f5c8ee5 GM |
3940 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
3941 | i = 0; | |
3942 | x = desired_row->x; | |
8399f8a0 GM |
3943 | |
3944 | /* Loop over glyphs that current and desired row may have | |
3945 | in common. */ | |
5f5c8ee5 | 3946 | while (i < stop) |
352f1545 | 3947 | { |
91d227d9 | 3948 | int can_skip_p = !abort_skipping; |
177c0ea7 | 3949 | |
5f5c8ee5 | 3950 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
3951 | don't have to be written. We can't skip if the last |
3952 | current glyph overlaps the glyph to its right. For | |
3953 | example, consider a current row of `if ' with the `f' in | |
3954 | Courier bold so that it overlaps the ` ' to its right. | |
3955 | If the desired row is ` ', we would skip over the space | |
3956 | after the `if' and there would remain a pixel from the | |
3957 | `f' on the screen. */ | |
3958 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 3959 | { |
e47306e6 GM |
3960 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
3961 | int left, right; | |
177c0ea7 | 3962 | |
e47306e6 GM |
3963 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
3964 | &left, &right); | |
91d227d9 | 3965 | can_skip_p = (right == 0 && !abort_skipping); |
352f1545 | 3966 | } |
177c0ea7 | 3967 | |
6d950f4c | 3968 | if (can_skip_p) |
352f1545 | 3969 | { |
91d227d9 CY |
3970 | int start_hpos = i; |
3971 | ||
6d950f4c GM |
3972 | while (i < stop |
3973 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
3974 | { | |
3975 | x += desired_glyph->pixel_width; | |
3976 | ++desired_glyph, ++current_glyph, ++i; | |
3977 | } | |
3978 | ||
3979 | /* Consider the case that the current row contains "xxx | |
3980 | ppp ggg" in italic Courier font, and the desired row | |
3981 | is "xxx ggg". The character `p' has lbearing, `g' | |
3982 | has not. The loop above will stop in front of the | |
3983 | first `p' in the current row. If we would start | |
3984 | writing glyphs there, we wouldn't erase the lbearing | |
3985 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 3986 | taken care of by draw_glyphs. */ |
6d950f4c GM |
3987 | if (overlapping_glyphs_p |
3988 | && i > 0 | |
3989 | && i < current_row->used[TEXT_AREA] | |
3990 | && (current_row->used[TEXT_AREA] | |
3991 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 3992 | { |
6d950f4c | 3993 | int left, right; |
177c0ea7 | 3994 | |
6d950f4c GM |
3995 | rif->get_glyph_overhangs (current_glyph, XFRAME (w->frame), |
3996 | &left, &right); | |
3997 | while (left > 0 && i > 0) | |
3998 | { | |
3999 | --i, --desired_glyph, --current_glyph; | |
4000 | x -= desired_glyph->pixel_width; | |
4001 | left -= desired_glyph->pixel_width; | |
4002 | } | |
91d227d9 CY |
4003 | |
4004 | /* Abort the skipping algorithm if we end up before | |
4005 | our starting point, to avoid looping (bug#1070). | |
4006 | This can happen when the lbearing is larger than | |
4007 | the pixel width. */ | |
4008 | abort_skipping = (i < start_hpos); | |
5f5c8ee5 | 4009 | } |
352f1545 | 4010 | } |
177c0ea7 | 4011 | |
5f5c8ee5 GM |
4012 | /* Try to avoid writing the entire rest of the desired row |
4013 | by looking for a resync point. This mainly prevents | |
4014 | mode line flickering in the case the mode line is in | |
4015 | fixed-pitch font, which it usually will be. */ | |
4016 | if (i < desired_row->used[TEXT_AREA]) | |
4017 | { | |
4018 | int start_x = x, start_hpos = i; | |
4019 | struct glyph *start = desired_glyph; | |
4020 | int current_x = x; | |
6d950f4c GM |
4021 | int skip_first_p = !can_skip_p; |
4022 | ||
5f5c8ee5 GM |
4023 | /* Find the next glyph that's equal again. */ |
4024 | while (i < stop | |
6d950f4c GM |
4025 | && (skip_first_p |
4026 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
4027 | && x == current_x) |
4028 | { | |
4029 | x += desired_glyph->pixel_width; | |
4030 | current_x += current_glyph->pixel_width; | |
4031 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 4032 | skip_first_p = 0; |
5f5c8ee5 | 4033 | } |
23b0200c | 4034 | |
5f5c8ee5 GM |
4035 | if (i == start_hpos || x != current_x) |
4036 | { | |
4037 | i = start_hpos; | |
4038 | x = start_x; | |
4039 | desired_glyph = start; | |
4040 | break; | |
4041 | } | |
e47306e6 | 4042 | |
5f5c8ee5 GM |
4043 | rif->cursor_to (vpos, start_hpos, desired_row->y, start_x); |
4044 | rif->write_glyphs (start, i - start_hpos); | |
408f5064 | 4045 | changed_p = 1; |
5f5c8ee5 GM |
4046 | } |
4047 | } | |
177c0ea7 | 4048 | |
5f5c8ee5 GM |
4049 | /* Write the rest. */ |
4050 | if (i < desired_row->used[TEXT_AREA]) | |
4051 | { | |
4052 | rif->cursor_to (vpos, i, desired_row->y, x); | |
4053 | rif->write_glyphs (desired_glyph, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 4054 | changed_p = 1; |
5f5c8ee5 | 4055 | } |
177c0ea7 | 4056 | |
5f5c8ee5 GM |
4057 | /* Maybe clear to end of line. */ |
4058 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
4059 | { | |
4060 | /* If new row extends to the end of the text area, nothing | |
4061 | has to be cleared, if and only if we did a write_glyphs | |
4062 | above. This is made sure by setting desired_stop_pos | |
4063 | appropriately above. */ | |
78897758 YM |
4064 | xassert (i < desired_row->used[TEXT_AREA] |
4065 | || ((desired_row->used[TEXT_AREA] | |
4066 | == current_row->used[TEXT_AREA]) | |
4067 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
4068 | } |
4069 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
4070 | { | |
4071 | /* If old row extends to the end of the text area, clear. */ | |
4072 | if (i >= desired_row->used[TEXT_AREA]) | |
4073 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 4074 | desired_row->pixel_width); |
5f5c8ee5 | 4075 | rif->clear_end_of_line (-1); |
408f5064 | 4076 | changed_p = 1; |
5f5c8ee5 GM |
4077 | } |
4078 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 4079 | { |
5f5c8ee5 GM |
4080 | /* Otherwise clear to the end of the old row. Everything |
4081 | after that position should be clear already. */ | |
4082 | int x; | |
177c0ea7 | 4083 | |
5f5c8ee5 GM |
4084 | if (i >= desired_row->used[TEXT_AREA]) |
4085 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 4086 | desired_row->pixel_width); |
5f5c8ee5 GM |
4087 | |
4088 | /* If cursor is displayed at the end of the line, make sure | |
4089 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
4090 | with which to erase the cursor (because this method | |
4091 | doesn't work with lbearing/rbearing), so we must do it | |
4092 | this way. */ | |
4093 | if (vpos == w->phys_cursor.vpos | |
f951a506 EZ |
4094 | && (desired_row->reversed_p |
4095 | ? (w->phys_cursor.hpos < 0) | |
4096 | : (w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]))) | |
5f5c8ee5 GM |
4097 | { |
4098 | w->phys_cursor_on_p = 0; | |
4099 | x = -1; | |
4100 | } | |
4101 | else | |
6b61353c | 4102 | x = current_row->pixel_width; |
5f5c8ee5 | 4103 | rif->clear_end_of_line (x); |
408f5064 | 4104 | changed_p = 1; |
2e8907d3 | 4105 | } |
23b0200c | 4106 | } |
408f5064 GM |
4107 | |
4108 | return changed_p; | |
23b0200c | 4109 | } |
4588ec20 | 4110 | |
5f5c8ee5 | 4111 | |
408f5064 GM |
4112 | /* Update row VPOS in window W. Value is non-zero if display has been |
4113 | changed. */ | |
5f5c8ee5 | 4114 | |
408f5064 | 4115 | static int |
971de7fb | 4116 | update_window_line (struct window *w, int vpos, int *mouse_face_overwritten_p) |
5f5c8ee5 GM |
4117 | { |
4118 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
4119 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 4120 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 4121 | int changed_p = 0; |
5f5c8ee5 | 4122 | |
5f5c8ee5 GM |
4123 | /* Set the row being updated. This is important to let xterm.c |
4124 | know what line height values are in effect. */ | |
4125 | updated_row = desired_row; | |
4126 | ||
177c0ea7 JB |
4127 | /* A row can be completely invisible in case a desired matrix was |
4128 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
4129 | the matrix. Make sure to make such rows current anyway, since |
4130 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
4131 | if (desired_row->mode_line_p |
4132 | || desired_row->visible_height > 0) | |
408f5064 | 4133 | { |
504805ac GM |
4134 | xassert (desired_row->enabled_p); |
4135 | ||
4136 | /* Update display of the left margin area, if there is one. */ | |
4137 | if (!desired_row->full_width_p | |
7df02016 | 4138 | && !NILP (w->left_margin_cols)) |
504805ac GM |
4139 | { |
4140 | changed_p = 1; | |
4141 | update_marginal_area (w, LEFT_MARGIN_AREA, vpos); | |
4142 | } | |
177c0ea7 | 4143 | |
504805ac GM |
4144 | /* Update the display of the text area. */ |
4145 | if (update_text_area (w, vpos)) | |
4146 | { | |
4147 | changed_p = 1; | |
4148 | if (current_row->mouse_face_p) | |
4149 | *mouse_face_overwritten_p = 1; | |
4150 | } | |
177c0ea7 | 4151 | |
504805ac GM |
4152 | /* Update display of the right margin area, if there is one. */ |
4153 | if (!desired_row->full_width_p | |
7df02016 | 4154 | && !NILP (w->right_margin_cols)) |
504805ac GM |
4155 | { |
4156 | changed_p = 1; | |
4157 | update_marginal_area (w, RIGHT_MARGIN_AREA, vpos); | |
4158 | } | |
177c0ea7 | 4159 | |
504805ac GM |
4160 | /* Draw truncation marks etc. */ |
4161 | if (!current_row->enabled_p | |
4162 | || desired_row->y != current_row->y | |
4163 | || desired_row->visible_height != current_row->visible_height | |
6b61353c | 4164 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 4165 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
6b61353c | 4166 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 4167 | || desired_row->mode_line_p != current_row->mode_line_p |
6b61353c | 4168 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
4169 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
4170 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
4171 | rif->after_update_window_line_hook (desired_row); | |
408f5064 | 4172 | } |
177c0ea7 | 4173 | |
5f5c8ee5 GM |
4174 | /* Update current_row from desired_row. */ |
4175 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
4176 | updated_row = NULL; | |
408f5064 | 4177 | return changed_p; |
5f5c8ee5 GM |
4178 | } |
4179 | ||
4180 | ||
4181 | /* Set the cursor after an update of window W. This function may only | |
4182 | be called from update_window. */ | |
4183 | ||
4184 | static void | |
971de7fb | 4185 | set_window_cursor_after_update (struct window *w) |
4588ec20 | 4186 | { |
5f5c8ee5 | 4187 | struct frame *f = XFRAME (w->frame); |
fa971ac3 | 4188 | struct redisplay_interface *rif = FRAME_RIF (f); |
5f5c8ee5 GM |
4189 | int cx, cy, vpos, hpos; |
4190 | ||
4191 | /* Not intended for frame matrix updates. */ | |
4192 | xassert (FRAME_WINDOW_P (f)); | |
177c0ea7 | 4193 | |
b96fd3e8 GM |
4194 | if (cursor_in_echo_area |
4195 | && !NILP (echo_area_buffer[0]) | |
4196 | /* If we are showing a message instead of the mini-buffer, | |
4197 | show the cursor for the message instead. */ | |
4198 | && XWINDOW (minibuf_window) == w | |
4199 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
4200 | /* These cases apply only to the frame that contains |
4201 | the active mini-buffer window. */ | |
4202 | && FRAME_HAS_MINIBUF_P (f) | |
4203 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
4204 | { | |
4205 | cx = cy = vpos = hpos = 0; | |
4206 | ||
4207 | if (cursor_in_echo_area >= 0) | |
4208 | { | |
4209 | /* If the mini-buffer is several lines high, find the last | |
4210 | line that has any text on it. Note: either all lines | |
4211 | are enabled or none. Otherwise we wouldn't be able to | |
4212 | determine Y. */ | |
862b4790 GM |
4213 | struct glyph_row *row, *last_row; |
4214 | struct glyph *glyph; | |
4215 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 4216 | |
862b4790 | 4217 | last_row = NULL; |
6206f8ce GM |
4218 | row = w->current_matrix->rows; |
4219 | while (row->enabled_p | |
4220 | && (last_row == NULL | |
4221 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 4222 | { |
862b4790 GM |
4223 | if (row->used[TEXT_AREA] |
4224 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
4225 | last_row = row; | |
6206f8ce | 4226 | ++row; |
862b4790 | 4227 | } |
177c0ea7 | 4228 | |
5f5c8ee5 GM |
4229 | if (last_row) |
4230 | { | |
6206f8ce GM |
4231 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
4232 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 4233 | |
b96fd3e8 | 4234 | while (last > start && last->charpos < 0) |
862b4790 | 4235 | --last; |
177c0ea7 | 4236 | |
862b4790 GM |
4237 | for (glyph = start; glyph < last; ++glyph) |
4238 | { | |
4239 | cx += glyph->pixel_width; | |
4240 | ++hpos; | |
4241 | } | |
4242 | ||
5f5c8ee5 | 4243 | cy = last_row->y; |
862b4790 | 4244 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
4245 | } |
4246 | } | |
4247 | } | |
4248 | else | |
4249 | { | |
4250 | cx = w->cursor.x; | |
4251 | cy = w->cursor.y; | |
4252 | hpos = w->cursor.hpos; | |
4253 | vpos = w->cursor.vpos; | |
4254 | } | |
4588ec20 | 4255 | |
5f5c8ee5 | 4256 | /* Window cursor can be out of sync for horizontally split windows. */ |
f951a506 | 4257 | hpos = max (-1, hpos); /* -1 is for when cursor is on the left fringe */ |
5f5c8ee5 GM |
4258 | hpos = min (w->current_matrix->matrix_w - 1, hpos); |
4259 | vpos = max (0, vpos); | |
4260 | vpos = min (w->current_matrix->nrows - 1, vpos); | |
4261 | rif->cursor_to (vpos, hpos, cy, cx); | |
4588ec20 | 4262 | } |
4588ec20 | 4263 | |
5f5c8ee5 | 4264 | |
6df5d75f GM |
4265 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window |
4266 | tree rooted at W. */ | |
4267 | ||
4268 | void | |
971de7fb | 4269 | set_window_update_flags (struct window *w, int on_p) |
6df5d75f GM |
4270 | { |
4271 | while (w) | |
4272 | { | |
4273 | if (!NILP (w->hchild)) | |
4274 | set_window_update_flags (XWINDOW (w->hchild), on_p); | |
4275 | else if (!NILP (w->vchild)) | |
4276 | set_window_update_flags (XWINDOW (w->vchild), on_p); | |
4277 | else | |
4278 | w->must_be_updated_p = on_p; | |
4279 | ||
4280 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
4281 | } | |
177c0ea7 | 4282 | } |
6df5d75f GM |
4283 | |
4284 | ||
4285 | \f | |
4286 | /*********************************************************************** | |
4287 | Window-Based Scrolling | |
4288 | ***********************************************************************/ | |
4289 | ||
4290 | /* Structure describing rows in scrolling_window. */ | |
4291 | ||
4292 | struct row_entry | |
4293 | { | |
4294 | /* Number of occurrences of this row in desired and current matrix. */ | |
4295 | int old_uses, new_uses; | |
177c0ea7 | 4296 | |
6df5d75f GM |
4297 | /* Vpos of row in new matrix. */ |
4298 | int new_line_number; | |
4299 | ||
4300 | /* Bucket index of this row_entry in the hash table row_table. */ | |
4301 | int bucket; | |
177c0ea7 | 4302 | |
6df5d75f GM |
4303 | /* The row described by this entry. */ |
4304 | struct glyph_row *row; | |
177c0ea7 | 4305 | |
6df5d75f GM |
4306 | /* Hash collision chain. */ |
4307 | struct row_entry *next; | |
4308 | }; | |
4309 | ||
4310 | /* A pool to allocate row_entry structures from, and the size of the | |
4311 | pool. The pool is reallocated in scrolling_window when we find | |
4312 | that we need a larger one. */ | |
4313 | ||
4314 | static struct row_entry *row_entry_pool; | |
4315 | static int row_entry_pool_size; | |
4316 | ||
4317 | /* Index of next free entry in row_entry_pool. */ | |
4318 | ||
4319 | static int row_entry_idx; | |
4320 | ||
4321 | /* The hash table used during scrolling, and the table's size. This | |
4322 | table is used to quickly identify equal rows in the desired and | |
4323 | current matrix. */ | |
4324 | ||
4325 | static struct row_entry **row_table; | |
4326 | static int row_table_size; | |
4327 | ||
4328 | /* Vectors of pointers to row_entry structures belonging to the | |
4329 | current and desired matrix, and the size of the vectors. */ | |
4330 | ||
4331 | static struct row_entry **old_lines, **new_lines; | |
4332 | static int old_lines_size, new_lines_size; | |
4333 | ||
4334 | /* A pool to allocate run structures from, and its size. */ | |
4335 | ||
4336 | static struct run *run_pool; | |
4337 | static int runs_size; | |
4338 | ||
4339 | /* A vector of runs of lines found during scrolling. */ | |
4340 | ||
4341 | static struct run **runs; | |
4342 | ||
6df5d75f GM |
4343 | /* Add glyph row ROW to the scrolling hash table during the scrolling |
4344 | of window W. */ | |
4345 | ||
4346 | static INLINE struct row_entry * | |
971de7fb | 4347 | add_row_entry (struct window *w, struct glyph_row *row) |
6df5d75f GM |
4348 | { |
4349 | struct row_entry *entry; | |
4350 | int i = row->hash % row_table_size; | |
177c0ea7 | 4351 | |
6df5d75f | 4352 | entry = row_table[i]; |
e4e0bee9 | 4353 | while (entry && !row_equal_p (w, entry->row, row, 1)) |
6df5d75f | 4354 | entry = entry->next; |
177c0ea7 | 4355 | |
6df5d75f GM |
4356 | if (entry == NULL) |
4357 | { | |
4358 | entry = row_entry_pool + row_entry_idx++; | |
4359 | entry->row = row; | |
4360 | entry->old_uses = entry->new_uses = 0; | |
4361 | entry->new_line_number = 0; | |
4362 | entry->bucket = i; | |
4363 | entry->next = row_table[i]; | |
4364 | row_table[i] = entry; | |
4365 | } | |
4366 | ||
4367 | return entry; | |
4368 | } | |
4369 | ||
4370 | ||
5f5c8ee5 | 4371 | /* Try to reuse part of the current display of W by scrolling lines. |
153a073c | 4372 | HEADER_LINE_P non-zero means W has a header line. |
5f5c8ee5 GM |
4373 | |
4374 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4375 | Technique for Isolating Differences Between Files." It should take | |
4376 | O(N) time. | |
4377 | ||
4378 | A short outline of the steps of the algorithm | |
4379 | ||
4380 | 1. Skip lines equal at the start and end of both matrices. | |
4381 | ||
4382 | 2. Enter rows in the current and desired matrix into a symbol | |
4383 | table, counting how often they appear in both matrices. | |
4384 | ||
4385 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4386 | i.e. we assume that such lines are likely to have been moved. | |
4387 | ||
4388 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4389 | forward and backward. | |
4390 | ||
4391 | Value is | |
4392 | ||
4393 | -1 if all rows were found to be equal. | |
4394 | 0 to indicate that we did not scroll the display, or | |
4395 | 1 if we did scroll. */ | |
4396 | ||
4397 | static int | |
971de7fb | 4398 | scrolling_window (struct window *w, int header_line_p) |
4588ec20 | 4399 | { |
5f5c8ee5 GM |
4400 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4401 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4402 | int yb = window_text_bottom_y (w); | |
6df5d75f GM |
4403 | int i, j, first_old, first_new, last_old, last_new; |
4404 | int nruns, nbytes, n, run_idx; | |
4405 | struct row_entry *entry; | |
fa971ac3 | 4406 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4407 | |
4408 | /* Skip over rows equal at the start. */ | |
bfdcafe1 | 4409 | for (i = header_line_p ? 1 : 0; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4410 | { |
bfdcafe1 GM |
4411 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4412 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4413 | ||
4414 | if (c->enabled_p | |
4415 | && d->enabled_p | |
6b61353c | 4416 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4417 | && c->y == d->y |
4418 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4419 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
4420 | && row_equal_p (w, c, d, 1)) | |
4421 | { | |
4422 | assign_row (c, d); | |
4423 | d->enabled_p = 0; | |
4424 | } | |
4425 | else | |
4426 | break; | |
5f5c8ee5 | 4427 | } |
4588ec20 | 4428 | |
5f5c8ee5 GM |
4429 | /* Give up if some rows in the desired matrix are not enabled. */ |
4430 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4431 | return -1; | |
177c0ea7 | 4432 | |
5f5c8ee5 GM |
4433 | first_old = first_new = i; |
4434 | ||
4435 | /* Set last_new to the index + 1 of the last enabled row in the | |
4436 | desired matrix. */ | |
4437 | i = first_new + 1; | |
4438 | while (i < desired_matrix->nrows - 1 | |
4439 | && MATRIX_ROW (desired_matrix, i)->enabled_p | |
6df5d75f | 4440 | && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)) <= yb) |
5f5c8ee5 GM |
4441 | ++i; |
4442 | ||
4443 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4444 | return 0; | |
4445 | ||
4446 | last_new = i; | |
4447 | ||
4448 | /* Set last_old to the index + 1 of the last enabled row in the | |
4449 | current matrix. We don't look at the enabled flag here because | |
4450 | we plan to reuse part of the display even if other parts are | |
4451 | disabled. */ | |
4452 | i = first_old + 1; | |
93962bfa GM |
4453 | while (i < current_matrix->nrows - 1) |
4454 | { | |
4455 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4456 | if (bottom <= yb) | |
4457 | ++i; | |
4458 | if (bottom >= yb) | |
4459 | break; | |
4460 | } | |
4461 | ||
5f5c8ee5 GM |
4462 | last_old = i; |
4463 | ||
4464 | /* Skip over rows equal at the bottom. */ | |
4465 | i = last_new; | |
4466 | j = last_old; | |
4467 | while (i - 1 > first_new | |
4468 | && j - 1 > first_old | |
4469 | && MATRIX_ROW (current_matrix, i - 1)->enabled_p | |
4470 | && (MATRIX_ROW (current_matrix, i - 1)->y | |
4471 | == MATRIX_ROW (desired_matrix, j - 1)->y) | |
6b61353c | 4472 | && !MATRIX_ROW (desired_matrix, j - 1)->redraw_fringe_bitmaps_p |
5f5c8ee5 GM |
4473 | && row_equal_p (w, |
4474 | MATRIX_ROW (desired_matrix, i - 1), | |
e4e0bee9 | 4475 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
4476 | --i, --j; |
4477 | last_new = i; | |
4478 | last_old = j; | |
4479 | ||
4480 | /* Nothing to do if all rows are equal. */ | |
4481 | if (last_new == first_new) | |
4482 | return 0; | |
4483 | ||
6df5d75f | 4484 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 4485 | |
6df5d75f GM |
4486 | if (current_matrix->nrows > old_lines_size) |
4487 | { | |
4488 | old_lines_size = current_matrix->nrows; | |
4489 | nbytes = old_lines_size * sizeof *old_lines; | |
4490 | old_lines = (struct row_entry **) xrealloc (old_lines, nbytes); | |
4491 | } | |
177c0ea7 | 4492 | |
6df5d75f GM |
4493 | if (desired_matrix->nrows > new_lines_size) |
4494 | { | |
4495 | new_lines_size = desired_matrix->nrows; | |
4496 | nbytes = new_lines_size * sizeof *new_lines; | |
4497 | new_lines = (struct row_entry **) xrealloc (new_lines, nbytes); | |
4498 | } | |
4499 | ||
4500 | n = desired_matrix->nrows + current_matrix->nrows; | |
4501 | if (3 * n > row_table_size) | |
4502 | { | |
4503 | row_table_size = next_almost_prime (3 * n); | |
4504 | nbytes = row_table_size * sizeof *row_table; | |
4505 | row_table = (struct row_entry **) xrealloc (row_table, nbytes); | |
72af86bd | 4506 | memset (row_table, 0, nbytes); |
6df5d75f GM |
4507 | } |
4508 | ||
4509 | if (n > row_entry_pool_size) | |
4510 | { | |
4511 | row_entry_pool_size = n; | |
4512 | nbytes = row_entry_pool_size * sizeof *row_entry_pool; | |
4513 | row_entry_pool = (struct row_entry *) xrealloc (row_entry_pool, nbytes); | |
4514 | } | |
4515 | ||
4516 | if (desired_matrix->nrows > runs_size) | |
4517 | { | |
4518 | runs_size = desired_matrix->nrows; | |
4519 | nbytes = runs_size * sizeof *runs; | |
4520 | runs = (struct run **) xrealloc (runs, nbytes); | |
4521 | nbytes = runs_size * sizeof *run_pool; | |
4522 | run_pool = (struct run *) xrealloc (run_pool, nbytes); | |
4523 | } | |
4524 | ||
4525 | nruns = run_idx = 0; | |
4526 | row_entry_idx = 0; | |
4527 | ||
4528 | /* Add rows from the current and desired matrix to the hash table | |
4529 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 4530 | |
5f5c8ee5 GM |
4531 | for (i = first_old; i < last_old; ++i) |
4532 | { | |
4533 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
4534 | { | |
6df5d75f GM |
4535 | entry = add_row_entry (w, MATRIX_ROW (current_matrix, i)); |
4536 | old_lines[i] = entry; | |
4537 | ++entry->old_uses; | |
5f5c8ee5 GM |
4538 | } |
4539 | else | |
6df5d75f | 4540 | old_lines[i] = NULL; |
5f5c8ee5 GM |
4541 | } |
4542 | ||
5f5c8ee5 GM |
4543 | for (i = first_new; i < last_new; ++i) |
4544 | { | |
4545 | xassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); | |
6df5d75f GM |
4546 | entry = add_row_entry (w, MATRIX_ROW (desired_matrix, i)); |
4547 | ++entry->new_uses; | |
4548 | entry->new_line_number = i; | |
4549 | new_lines[i] = entry; | |
5f5c8ee5 | 4550 | } |
4588ec20 | 4551 | |
5f5c8ee5 GM |
4552 | /* Identify moves based on lines that are unique and equal |
4553 | in both matrices. */ | |
4554 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
4555 | if (old_lines[i] |
4556 | && old_lines[i]->old_uses == 1 | |
4557 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 GM |
4558 | { |
4559 | int j, k; | |
6df5d75f GM |
4560 | int new_line = old_lines[i]->new_line_number; |
4561 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
4562 | |
4563 | /* Record move. */ | |
4564 | run->current_vpos = i; | |
4565 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
4566 | run->desired_vpos = new_line; | |
4567 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
4568 | run->nrows = 1; | |
4569 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
4570 | ||
4571 | /* Extend backward. */ | |
4572 | j = i - 1; | |
4573 | k = new_line - 1; | |
4574 | while (j > first_old | |
4575 | && k > first_new | |
6df5d75f | 4576 | && old_lines[j] == new_lines[k]) |
5f5c8ee5 GM |
4577 | { |
4578 | int h = MATRIX_ROW (current_matrix, j)->height; | |
177c0ea7 JB |
4579 | --run->current_vpos; |
4580 | --run->desired_vpos; | |
5f5c8ee5 GM |
4581 | ++run->nrows; |
4582 | run->height += h; | |
4583 | run->desired_y -= h; | |
4584 | run->current_y -= h; | |
4585 | --j, --k; | |
4586 | } | |
4588ec20 | 4587 | |
5f5c8ee5 GM |
4588 | /* Extend forward. */ |
4589 | j = i + 1; | |
4590 | k = new_line + 1; | |
4591 | while (j < last_old | |
4592 | && k < last_new | |
6df5d75f | 4593 | && old_lines[j] == new_lines[k]) |
5f5c8ee5 GM |
4594 | { |
4595 | int h = MATRIX_ROW (current_matrix, j)->height; | |
177c0ea7 | 4596 | ++run->nrows; |
5f5c8ee5 GM |
4597 | run->height += h; |
4598 | ++j, ++k; | |
4599 | } | |
19dff8dc | 4600 | |
5f5c8ee5 GM |
4601 | /* Insert run into list of all runs. Order runs by copied |
4602 | pixel lines. Note that we record runs that don't have to | |
4603 | be copied because they are already in place. This is done | |
4604 | because we can avoid calling update_window_line in this | |
4605 | case. */ | |
4606 | for (j = 0; j < nruns && runs[j]->height > run->height; ++j) | |
4607 | ; | |
2b4ec4d7 | 4608 | for (k = nruns; k > j; --k) |
5f5c8ee5 GM |
4609 | runs[k] = runs[k - 1]; |
4610 | runs[j] = run; | |
4611 | ++nruns; | |
4612 | ||
4613 | i += run->nrows; | |
4614 | } | |
4615 | else | |
4616 | ++i; | |
4588ec20 | 4617 | |
5f5c8ee5 GM |
4618 | /* Do the moves. Do it in a way that we don't overwrite something |
4619 | we want to copy later on. This is not solvable in general | |
4620 | because there is only one display and we don't have a way to | |
4621 | exchange areas on this display. Example: | |
4588ec20 | 4622 | |
5f5c8ee5 GM |
4623 | +-----------+ +-----------+ |
4624 | | A | | B | | |
4625 | +-----------+ --> +-----------+ | |
4626 | | B | | A | | |
4627 | +-----------+ +-----------+ | |
4588ec20 | 4628 | |
5f5c8ee5 GM |
4629 | Instead, prefer bigger moves, and invalidate moves that would |
4630 | copy from where we copied to. */ | |
ea0d86af | 4631 | |
5f5c8ee5 GM |
4632 | for (i = 0; i < nruns; ++i) |
4633 | if (runs[i]->nrows > 0) | |
4634 | { | |
4635 | struct run *r = runs[i]; | |
24e86043 | 4636 | |
5f5c8ee5 GM |
4637 | /* Copy on the display. */ |
4638 | if (r->current_y != r->desired_y) | |
4639 | { | |
4640 | rif->scroll_run_hook (w, r); | |
4641 | ||
4642 | /* Invalidate runs that copy from where we copied to. */ | |
4643 | for (j = i + 1; j < nruns; ++j) | |
4644 | { | |
4645 | struct run *p = runs[j]; | |
177c0ea7 | 4646 | |
5f5c8ee5 GM |
4647 | if ((p->current_y >= r->desired_y |
4648 | && p->current_y < r->desired_y + r->height) | |
4649 | || (p->current_y + p->height >= r->desired_y | |
4650 | && (p->current_y + p->height | |
4651 | < r->desired_y + r->height))) | |
4652 | p->nrows = 0; | |
4653 | } | |
4654 | } | |
ea0d86af | 4655 | |
5f5c8ee5 GM |
4656 | /* Assign matrix rows. */ |
4657 | for (j = 0; j < r->nrows; ++j) | |
4658 | { | |
4659 | struct glyph_row *from, *to; | |
408f5064 | 4660 | int to_overlapped_p; |
e876ff42 | 4661 | |
5f5c8ee5 GM |
4662 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
4663 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 4664 | to_overlapped_p = to->overlapped_p; |
6b61353c KH |
4665 | if (!from->mode_line_p && !w->pseudo_window_p |
4666 | && (to->left_fringe_bitmap != from->left_fringe_bitmap | |
4667 | || to->right_fringe_bitmap != from->right_fringe_bitmap | |
4668 | || to->left_fringe_face_id != from->left_fringe_face_id | |
4669 | || to->right_fringe_face_id != from->right_fringe_face_id | |
3d4a365f | 4670 | || to->overlay_arrow_bitmap != from->overlay_arrow_bitmap)) |
6b61353c | 4671 | from->redraw_fringe_bitmaps_p = 1; |
5f5c8ee5 GM |
4672 | assign_row (to, from); |
4673 | to->enabled_p = 1, from->enabled_p = 0; | |
408f5064 | 4674 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
4675 | } |
4676 | } | |
15874c59 | 4677 | |
6df5d75f GM |
4678 | /* Clear the hash table, for the next time. */ |
4679 | for (i = 0; i < row_entry_idx; ++i) | |
4680 | row_table[row_entry_pool[i].bucket] = NULL; | |
4681 | ||
6b61353c KH |
4682 | /* Value is > 0 to indicate that we scrolled the display. */ |
4683 | return nruns; | |
5f5c8ee5 | 4684 | } |
de83c314 | 4685 | |
15874c59 | 4686 | |
4588ec20 | 4687 | \f |
5f5c8ee5 GM |
4688 | /************************************************************************ |
4689 | Frame-Based Updates | |
4690 | ************************************************************************/ | |
4588ec20 | 4691 | |
5f5c8ee5 | 4692 | /* Update the desired frame matrix of frame F. |
4588ec20 | 4693 | |
5f5c8ee5 GM |
4694 | FORCE_P non-zero means that the update should not be stopped by |
4695 | pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling | |
4696 | should not be tried. | |
4697 | ||
4698 | Value is non-zero if update was stopped due to pending input. */ | |
4699 | ||
4700 | static int | |
971de7fb | 4701 | update_frame_1 (struct frame *f, int force_p, int inhibit_id_p) |
4588ec20 | 4702 | { |
5f5c8ee5 GM |
4703 | /* Frame matrices to work on. */ |
4704 | struct glyph_matrix *current_matrix = f->current_matrix; | |
4705 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
4706 | int i; | |
4588ec20 JB |
4707 | int pause; |
4708 | int preempt_count = baud_rate / 2400 + 1; | |
5f5c8ee5 GM |
4709 | |
4710 | xassert (current_matrix && desired_matrix); | |
4588ec20 | 4711 | |
c37e4889 RS |
4712 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
4713 | calculate_costs (f); | |
4714 | ||
d88c2b9e RS |
4715 | if (preempt_count <= 0) |
4716 | preempt_count = 1; | |
4717 | ||
a2130dbb KS |
4718 | #if !PERIODIC_PREEMPTION_CHECKING |
4719 | if (!force_p && detect_input_pending_ignore_squeezables ()) | |
4588ec20 JB |
4720 | { |
4721 | pause = 1; | |
4722 | goto do_pause; | |
4723 | } | |
d012c62b | 4724 | #endif |
4588ec20 | 4725 | |
5f5c8ee5 | 4726 | /* If we cannot insert/delete lines, it's no use trying it. */ |
daf01701 | 4727 | if (!FRAME_LINE_INS_DEL_OK (f)) |
5f5c8ee5 | 4728 | inhibit_id_p = 1; |
7098a0fa | 4729 | |
efb859b4 | 4730 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
4731 | i/d line if just want cursor motion. */ |
4732 | for (i = 0; i < desired_matrix->nrows; i++) | |
4733 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
4734 | break; |
4735 | ||
4736 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
4737 | if (!inhibit_id_p && i < desired_matrix->nrows) |
4738 | force_p |= scrolling (f); | |
4588ec20 JB |
4739 | |
4740 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
4741 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
4742 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 4743 | |
5f5c8ee5 GM |
4744 | /* Now update the rest of the lines. */ |
4745 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 4746 | { |
5f5c8ee5 | 4747 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 4748 | { |
b6a65ac2 | 4749 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
4750 | { |
4751 | /* Flush out every so many lines. | |
4752 | Also flush out if likely to have more than 1k buffered | |
4753 | otherwise. I'm told that some telnet connections get | |
4754 | really screwed by more than 1k output at once. */ | |
fced92f1 CY |
4755 | FILE *display_output = FRAME_TTY (f)->output; |
4756 | if (display_output) | |
4588ec20 | 4757 | { |
fced92f1 CY |
4758 | int outq = PENDING_OUTPUT_COUNT (display_output); |
4759 | if (outq > 900 | |
4760 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
4588ec20 | 4761 | { |
fced92f1 CY |
4762 | fflush (display_output); |
4763 | if (preempt_count == 1) | |
4764 | { | |
a41f8bed | 4765 | #ifdef EMACS_OUTQSIZE |
fced92f1 CY |
4766 | if (EMACS_OUTQSIZE (0, &outq) < 0) |
4767 | /* Probably not a tty. Ignore the error and reset | |
4768 | the outq count. */ | |
4769 | outq = PENDING_OUTPUT_COUNT (FRAME_TTY (f->output)); | |
4588ec20 | 4770 | #endif |
fced92f1 CY |
4771 | outq *= 10; |
4772 | if (baud_rate <= outq && baud_rate > 0) | |
4773 | sleep (outq / baud_rate); | |
4774 | } | |
4588ec20 JB |
4775 | } |
4776 | } | |
4588ec20 JB |
4777 | } |
4778 | ||
d012c62b KS |
4779 | #if PERIODIC_PREEMPTION_CHECKING |
4780 | if (!force_p) | |
4781 | { | |
4782 | EMACS_TIME tm, dif; | |
4783 | EMACS_GET_TIME (tm); | |
4784 | EMACS_SUB_TIME (dif, preemption_next_check, tm); | |
4785 | if (EMACS_TIME_NEG_P (dif)) | |
4786 | { | |
4787 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
4788 | if (detect_input_pending_ignore_squeezables ()) |
4789 | break; | |
d012c62b KS |
4790 | } |
4791 | } | |
4792 | #else | |
4793 | if (!force_p && (i - 1) % preempt_count == 0) | |
a2d5fca0 | 4794 | detect_input_pending_ignore_squeezables (); |
d012c62b | 4795 | #endif |
a2960116 | 4796 | |
5f5c8ee5 | 4797 | update_frame_line (f, i); |
4588ec20 | 4798 | } |
4588ec20 | 4799 | } |
177c0ea7 | 4800 | |
7df02016 | 4801 | pause = (i < FRAME_LINES (f) - 1) ? i : 0; |
4588ec20 JB |
4802 | |
4803 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
4804 | if (!pause) | |
4805 | { | |
48cf7030 | 4806 | if ((cursor_in_echo_area |
5f5c8ee5 | 4807 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 4808 | show the cursor for the message instead of for the |
5f5c8ee5 | 4809 | (now hidden) mini-buffer contents. */ |
2577053b RS |
4810 | || (EQ (minibuf_window, selected_window) |
4811 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 4812 | && !NILP (echo_area_buffer[0]))) |
2577053b | 4813 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 4814 | the active mini-buffer window. */ |
2577053b | 4815 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 4816 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 4817 | { |
7df02016 | 4818 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
4819 | int row, col; |
4820 | ||
4821 | if (cursor_in_echo_area < 0) | |
4822 | { | |
5f5c8ee5 GM |
4823 | /* Negative value of cursor_in_echo_area means put |
4824 | cursor at beginning of line. */ | |
648fa17d JB |
4825 | row = top; |
4826 | col = 0; | |
4827 | } | |
1113d9db | 4828 | else |
648fa17d | 4829 | { |
5f5c8ee5 GM |
4830 | /* Positive value of cursor_in_echo_area means put |
4831 | cursor at the end of the prompt. If the mini-buffer | |
4832 | is several lines high, find the last line that has | |
4833 | any text on it. */ | |
7df02016 | 4834 | row = FRAME_LINES (f); |
177c0ea7 | 4835 | do |
648fa17d | 4836 | { |
5f5c8ee5 GM |
4837 | --row; |
4838 | col = 0; | |
177c0ea7 | 4839 | |
5f5c8ee5 GM |
4840 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
4841 | { | |
4842 | /* Frame rows are filled up with spaces that | |
4843 | must be ignored here. */ | |
5f5c8ee5 GM |
4844 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
4845 | row); | |
4846 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
4847 | struct glyph *last = start + r->used[TEXT_AREA]; | |
4848 | ||
4849 | while (last > start | |
4850 | && (last - 1)->charpos < 0) | |
4851 | --last; | |
177c0ea7 | 4852 | |
5f5c8ee5 GM |
4853 | col = last - start; |
4854 | } | |
648fa17d JB |
4855 | } |
4856 | while (row > top && col == 0); | |
4857 | ||
6395da5c | 4858 | /* Make sure COL is not out of range. */ |
868e640e | 4859 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 4860 | { |
6395da5c | 4861 | /* If we have another row, advance cursor into it. */ |
7df02016 | 4862 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 4863 | { |
7df02016 | 4864 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
4865 | row++; |
4866 | } | |
4867 | /* Otherwise move it back in range. */ | |
4868 | else | |
868e640e | 4869 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
4870 | } |
4871 | } | |
4872 | ||
385ed61f | 4873 | cursor_to (f, row, col); |
1113d9db | 4874 | } |
4588ec20 | 4875 | else |
5f5c8ee5 GM |
4876 | { |
4877 | /* We have only one cursor on terminal frames. Use it to | |
4878 | display the cursor of the selected window. */ | |
4879 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
4880 | if (w->cursor.vpos >= 0 |
4881 | /* The cursor vpos may be temporarily out of bounds | |
4882 | in the following situation: There is one window, | |
4883 | with the cursor in the lower half of it. The window | |
4884 | is split, and a message causes a redisplay before | |
4885 | a new cursor position has been computed. */ | |
7df02016 | 4886 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
4887 | { |
4888 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
4889 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
4890 | ||
7df02016 KS |
4891 | if (INTEGERP (w->left_margin_cols)) |
4892 | x += XFASTINT (w->left_margin_cols); | |
177c0ea7 | 4893 | |
7df02016 | 4894 | /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */ |
385ed61f | 4895 | cursor_to (f, y, x); |
5f5c8ee5 GM |
4896 | } |
4897 | } | |
4588ec20 JB |
4898 | } |
4899 | ||
4588ec20 JB |
4900 | do_pause: |
4901 | ||
5f5c8ee5 | 4902 | clear_desired_matrices (f); |
4588ec20 JB |
4903 | return pause; |
4904 | } | |
4905 | ||
4588ec20 | 4906 | |
5f5c8ee5 | 4907 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 4908 | |
dfcf069d | 4909 | int |
971de7fb | 4910 | scrolling (struct frame *frame) |
4588ec20 JB |
4911 | { |
4912 | int unchanged_at_top, unchanged_at_bottom; | |
4913 | int window_size; | |
4914 | int changed_lines; | |
7df02016 KS |
4915 | int *old_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); |
4916 | int *new_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4917 | int *draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4918 | int *old_draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 4919 | register int i; |
7df02016 | 4920 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
4921 | struct glyph_matrix *current_matrix = frame->current_matrix; |
4922 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 4923 | |
5f5c8ee5 GM |
4924 | if (!current_matrix) |
4925 | abort (); | |
4588ec20 | 4926 | |
5f5c8ee5 GM |
4927 | /* Compute hash codes of all the lines. Also calculate number of |
4928 | changed lines, number of unchanged lines at the beginning, and | |
4929 | number of unchanged lines at the end. */ | |
4588ec20 JB |
4930 | changed_lines = 0; |
4931 | unchanged_at_top = 0; | |
7df02016 KS |
4932 | unchanged_at_bottom = FRAME_LINES (frame); |
4933 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
4934 | { |
4935 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 4936 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 4937 | return 0; |
5f5c8ee5 GM |
4938 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
4939 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
4940 | { |
4941 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
4942 | new_hash[i] = old_hash[i]; | |
4943 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
4944 | draw_cost[i] = INFINITY; | |
4945 | } | |
4588ec20 | 4946 | else |
f188b3c4 | 4947 | { |
5f5c8ee5 GM |
4948 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
4949 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 4950 | } |
4588ec20 JB |
4951 | |
4952 | if (old_hash[i] != new_hash[i]) | |
4953 | { | |
4954 | changed_lines++; | |
7df02016 | 4955 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
4956 | } |
4957 | else if (i == unchanged_at_top) | |
4958 | unchanged_at_top++; | |
5f5c8ee5 | 4959 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
4960 | } |
4961 | ||
4962 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
daf01701 | 4963 | if ((!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4964 | && changed_lines < baud_rate / 2400) |
7df02016 | 4965 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
4966 | return 1; |
4967 | ||
7df02016 | 4968 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
4969 | - unchanged_at_bottom); |
4970 | ||
daf01701 | 4971 | if (FRAME_SCROLL_REGION_OK (frame)) |
4588ec20 | 4972 | free_at_end_vpos -= unchanged_at_bottom; |
daf01701 | 4973 | else if (FRAME_MEMORY_BELOW_FRAME (frame)) |
4588ec20 JB |
4974 | free_at_end_vpos = -1; |
4975 | ||
4976 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 4977 | current frame and desired frame, don't bother with i/d calc. */ |
daf01701 | 4978 | if (!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4979 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
4980 | && (window_size >= |
4981 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 4982 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
4983 | old_hash, new_hash, draw_cost))) |
4984 | return 0; | |
4985 | ||
5f5c8ee5 GM |
4986 | if (window_size < 2) |
4987 | return 0; | |
4988 | ||
502b9b64 | 4989 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 4990 | draw_cost + unchanged_at_top - 1, |
190bb91a | 4991 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
4992 | old_hash + unchanged_at_top - 1, |
4993 | new_hash + unchanged_at_top - 1, | |
4994 | free_at_end_vpos - unchanged_at_top); | |
4995 | ||
4996 | return 0; | |
4997 | } | |
4588ec20 | 4998 | |
4588ec20 | 4999 | |
5f5c8ee5 GM |
5000 | /* Count the number of blanks at the start of the vector of glyphs R |
5001 | which is LEN glyphs long. */ | |
4588ec20 | 5002 | |
4588ec20 | 5003 | static int |
971de7fb | 5004 | count_blanks (struct glyph *r, int len) |
4588ec20 | 5005 | { |
5f5c8ee5 | 5006 | int i; |
177c0ea7 | 5007 | |
5f5c8ee5 GM |
5008 | for (i = 0; i < len; ++i) |
5009 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
5010 | break; | |
5011 | ||
5012 | return i; | |
4588ec20 JB |
5013 | } |
5014 | ||
5f5c8ee5 GM |
5015 | |
5016 | /* Count the number of glyphs in common at the start of the glyph | |
5017 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
5018 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
5019 | ||
4588ec20 | 5020 | static int |
971de7fb | 5021 | count_match (struct glyph *str1, struct glyph *end1, struct glyph *str2, struct glyph *end2) |
4588ec20 | 5022 | { |
5f5c8ee5 GM |
5023 | struct glyph *p1 = str1; |
5024 | struct glyph *p2 = str2; | |
177c0ea7 | 5025 | |
5f5c8ee5 GM |
5026 | while (p1 < end1 |
5027 | && p2 < end2 | |
42186983 | 5028 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 5029 | ++p1, ++p2; |
177c0ea7 | 5030 | |
5f5c8ee5 | 5031 | return p1 - str1; |
4588ec20 JB |
5032 | } |
5033 | ||
5f5c8ee5 | 5034 | |
4588ec20 | 5035 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 5036 | |
7df02016 | 5037 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))]) |
4588ec20 | 5038 | |
5f5c8ee5 GM |
5039 | |
5040 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
5041 | ||
4588ec20 | 5042 | static void |
971de7fb | 5043 | update_frame_line (struct frame *f, int vpos) |
4588ec20 | 5044 | { |
5f5c8ee5 | 5045 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
5046 | int tem; |
5047 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
5048 | struct glyph_matrix *current_matrix = f->current_matrix; |
5049 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
5050 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
5051 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
5052 | int must_write_whole_line_p; | |
daf01701 | 5053 | int write_spaces_p = FRAME_MUST_WRITE_SPACES (f); |
c363a1d6 | 5054 | int colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background |
0a894bad GM |
5055 | != FACE_TTY_DEFAULT_BG_COLOR); |
5056 | ||
5057 | if (colored_spaces_p) | |
5058 | write_spaces_p = 1; | |
5f5c8ee5 | 5059 | |
26c63686 GM |
5060 | /* Current row not enabled means it has unknown contents. We must |
5061 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
5062 | must_write_whole_line_p = !current_row->enabled_p; |
5063 | if (must_write_whole_line_p) | |
4588ec20 | 5064 | { |
5f5c8ee5 | 5065 | obody = 0; |
4588ec20 JB |
5066 | olen = 0; |
5067 | } | |
5068 | else | |
5069 | { | |
5f5c8ee5 GM |
5070 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
5071 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 5072 | |
4cecaab8 MB |
5073 | /* Ignore trailing spaces, if we can. */ |
5074 | if (!write_spaces_p) | |
5075 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
5076 | olen--; | |
4588ec20 JB |
5077 | } |
5078 | ||
5f5c8ee5 GM |
5079 | current_row->enabled_p = 1; |
5080 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 5081 | |
5f5c8ee5 GM |
5082 | /* If desired line is empty, just clear the line. */ |
5083 | if (!desired_row->enabled_p) | |
4588ec20 JB |
5084 | { |
5085 | nlen = 0; | |
5086 | goto just_erase; | |
5087 | } | |
5088 | ||
5f5c8ee5 GM |
5089 | nbody = desired_row->glyphs[TEXT_AREA]; |
5090 | nlen = desired_row->used[TEXT_AREA]; | |
5091 | nend = nbody + nlen; | |
5092 | ||
5093 | /* If display line has unknown contents, write the whole line. */ | |
5094 | if (must_write_whole_line_p) | |
5095 | { | |
26c63686 | 5096 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 5097 | if (!write_spaces_p) |
74ca462f GM |
5098 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
5099 | --nlen; | |
5100 | ||
26c63686 | 5101 | /* Write the contents of the desired line. */ |
74ca462f | 5102 | if (nlen) |
26c63686 | 5103 | { |
385ed61f KL |
5104 | cursor_to (f, vpos, 0); |
5105 | write_glyphs (f, nbody, nlen); | |
26c63686 | 5106 | } |
177c0ea7 | 5107 | |
26c63686 GM |
5108 | /* Don't call clear_end_of_line if we already wrote the whole |
5109 | line. The cursor will not be at the right margin in that | |
5110 | case but in the line below. */ | |
7df02016 | 5111 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 | 5112 | { |
385ed61f KL |
5113 | cursor_to (f, vpos, nlen); |
5114 | clear_end_of_line (f, FRAME_TOTAL_COLS (f)); | |
26c63686 | 5115 | } |
58827478 GM |
5116 | else |
5117 | /* Make sure we are in the right row, otherwise cursor movement | |
5118 | with cmgoto might use `ch' in the wrong row. */ | |
385ed61f | 5119 | cursor_to (f, vpos, 0); |
177c0ea7 | 5120 | |
5f5c8ee5 GM |
5121 | make_current (desired_matrix, current_matrix, vpos); |
5122 | return; | |
5123 | } | |
4588ec20 JB |
5124 | |
5125 | /* Pretend trailing spaces are not there at all, | |
5126 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
5127 | if (!write_spaces_p) |
5128 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
5129 | nlen--; | |
4588ec20 JB |
5130 | |
5131 | /* If there's no i/d char, quickly do the best we can without it. */ | |
daf01701 | 5132 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
4588ec20 | 5133 | { |
5f5c8ee5 | 5134 | int i, j; |
4588ec20 | 5135 | |
5f5c8ee5 GM |
5136 | /* Find the first glyph in desired row that doesn't agree with |
5137 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
5138 | for (i = 0; i < nlen; i++) |
5139 | { | |
5f5c8ee5 | 5140 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 5141 | { |
5f5c8ee5 GM |
5142 | /* Find the end of the run of different glyphs. */ |
5143 | j = i + 1; | |
5144 | while (j < nlen | |
5145 | && (j >= olen | |
5146 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
5147 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
5148 | ++j; | |
177c0ea7 JB |
5149 | |
5150 | /* Output this run of non-matching chars. */ | |
385ed61f KL |
5151 | cursor_to (f, vpos, i); |
5152 | write_glyphs (f, nbody + i, j - i); | |
5f5c8ee5 | 5153 | i = j - 1; |
4588ec20 JB |
5154 | |
5155 | /* Now find the next non-match. */ | |
5156 | } | |
5157 | } | |
5158 | ||
5159 | /* Clear the rest of the line, or the non-clear part of it. */ | |
5160 | if (olen > nlen) | |
5161 | { | |
385ed61f KL |
5162 | cursor_to (f, vpos, nlen); |
5163 | clear_end_of_line (f, olen); | |
4588ec20 JB |
5164 | } |
5165 | ||
5f5c8ee5 GM |
5166 | /* Make current row = desired row. */ |
5167 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
5168 | return; |
5169 | } | |
5170 | ||
5f5c8ee5 GM |
5171 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
5172 | characters in a row. */ | |
5173 | ||
4588ec20 JB |
5174 | if (!olen) |
5175 | { | |
5f5c8ee5 GM |
5176 | /* If current line is blank, skip over initial spaces, if |
5177 | possible, and write the rest. */ | |
4cecaab8 | 5178 | if (write_spaces_p) |
5f5c8ee5 GM |
5179 | nsp = 0; |
5180 | else | |
5181 | nsp = count_blanks (nbody, nlen); | |
5182 | ||
4588ec20 JB |
5183 | if (nlen > nsp) |
5184 | { | |
385ed61f KL |
5185 | cursor_to (f, vpos, nsp); |
5186 | write_glyphs (f, nbody + nsp, nlen - nsp); | |
4588ec20 JB |
5187 | } |
5188 | ||
502b9b64 | 5189 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 5190 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
5191 | return; |
5192 | } | |
5193 | ||
4588ec20 | 5194 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 5195 | osp = count_blanks (obody, olen); |
4cecaab8 | 5196 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 5197 | |
5f5c8ee5 GM |
5198 | /* Compute number of matching chars starting with first non-blank. */ |
5199 | begmatch = count_match (obody + osp, obody + olen, | |
5200 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
5201 | |
5202 | /* Spaces in new match implicit space past the end of old. */ | |
5203 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 5204 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
5205 | { |
5206 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
5207 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
5208 | ++begmatch; | |
4588ec20 JB |
5209 | } |
5210 | ||
5211 | /* Avoid doing insert/delete char | |
5212 | just cause number of leading spaces differs | |
5f5c8ee5 | 5213 | when the following text does not match. */ |
4588ec20 JB |
5214 | if (begmatch == 0 && osp != nsp) |
5215 | osp = nsp = min (osp, nsp); | |
5216 | ||
5217 | /* Find matching characters at end of line */ | |
5218 | op1 = obody + olen; | |
5219 | np1 = nbody + nlen; | |
5220 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
5221 | while (op1 > op2 |
5222 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
5223 | { |
5224 | op1--; | |
5225 | np1--; | |
5226 | } | |
5227 | endmatch = obody + olen - op1; | |
5228 | ||
4588ec20 JB |
5229 | /* tem gets the distance to insert or delete. |
5230 | endmatch is how many characters we save by doing so. | |
5231 | Is it worth it? */ | |
5232 | ||
5233 | tem = (nlen - nsp) - (olen - osp); | |
5234 | if (endmatch && tem | |
daf01701 | 5235 | && (!FRAME_CHAR_INS_DEL_OK (f) |
8a56675d | 5236 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
5237 | endmatch = 0; |
5238 | ||
5239 | /* nsp - osp is the distance to insert or delete. | |
5240 | If that is nonzero, begmatch is known to be nonzero also. | |
5241 | begmatch + endmatch is how much we save by doing the ins/del. | |
5242 | Is it worth it? */ | |
5243 | ||
5244 | if (nsp != osp | |
daf01701 | 5245 | && (!FRAME_CHAR_INS_DEL_OK (f) |
c363a1d6 | 5246 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
5247 | { |
5248 | begmatch = 0; | |
5249 | endmatch = 0; | |
5250 | osp = nsp = min (osp, nsp); | |
5251 | } | |
5252 | ||
5253 | /* Now go through the line, inserting, writing and | |
5254 | deleting as appropriate. */ | |
5255 | ||
5256 | if (osp > nsp) | |
5257 | { | |
385ed61f KL |
5258 | cursor_to (f, vpos, nsp); |
5259 | delete_glyphs (f, osp - nsp); | |
4588ec20 JB |
5260 | } |
5261 | else if (nsp > osp) | |
5262 | { | |
5263 | /* If going to delete chars later in line | |
5264 | and insert earlier in the line, | |
5265 | must delete first to avoid losing data in the insert */ | |
5266 | if (endmatch && nlen < olen + nsp - osp) | |
5267 | { | |
385ed61f KL |
5268 | cursor_to (f, vpos, nlen - endmatch + osp - nsp); |
5269 | delete_glyphs (f, olen + nsp - osp - nlen); | |
4588ec20 JB |
5270 | olen = nlen - (nsp - osp); |
5271 | } | |
385ed61f KL |
5272 | cursor_to (f, vpos, osp); |
5273 | insert_glyphs (f, 0, nsp - osp); | |
4588ec20 JB |
5274 | } |
5275 | olen += nsp - osp; | |
5276 | ||
5277 | tem = nsp + begmatch + endmatch; | |
5278 | if (nlen != tem || olen != tem) | |
5279 | { | |
4588ec20 JB |
5280 | if (!endmatch || nlen == olen) |
5281 | { | |
c363a1d6 GM |
5282 | /* If new text being written reaches right margin, there is |
5283 | no need to do clear-to-eol at the end of this function | |
5284 | (and it would not be safe, since cursor is not going to | |
5285 | be "at the margin" after the text is done). */ | |
7df02016 | 5286 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 5287 | olen = 0; |
c363a1d6 GM |
5288 | |
5289 | /* Function write_glyphs is prepared to do nothing | |
5290 | if passed a length <= 0. Check it here to avoid | |
5291 | unnecessary cursor movement. */ | |
5292 | if (nlen - tem > 0) | |
5293 | { | |
385ed61f KL |
5294 | cursor_to (f, vpos, nsp + begmatch); |
5295 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
c363a1d6 | 5296 | } |
4588ec20 JB |
5297 | } |
5298 | else if (nlen > olen) | |
5299 | { | |
24e86043 KH |
5300 | /* Here, we used to have the following simple code: |
5301 | ---------------------------------------- | |
5302 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
5303 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
5304 | ---------------------------------------- | |
5305 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
5306 | is a padding glyph. */ | |
5307 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
5308 | int del; | |
5f5c8ee5 | 5309 | |
385ed61f | 5310 | cursor_to (f, vpos, nsp + begmatch); |
177c0ea7 | 5311 | |
5f5c8ee5 | 5312 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
5313 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
5314 | out--; | |
385ed61f | 5315 | write_glyphs (f, nbody + nsp + begmatch, out); |
177c0ea7 | 5316 | |
5f5c8ee5 GM |
5317 | /* If we left columns to be overwritten, we must delete them. */ |
5318 | del = olen - tem - out; | |
c363a1d6 | 5319 | if (del > 0) |
385ed61f | 5320 | delete_glyphs (f, del); |
177c0ea7 | 5321 | |
5f5c8ee5 | 5322 | /* At last, we insert columns not yet written out. */ |
385ed61f | 5323 | insert_glyphs (f, nbody + nsp + begmatch + out, nlen - olen + del); |
5f5c8ee5 GM |
5324 | olen = nlen; |
5325 | } | |
5326 | else if (olen > nlen) | |
5327 | { | |
385ed61f KL |
5328 | cursor_to (f, vpos, nsp + begmatch); |
5329 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
5330 | delete_glyphs (f, olen - nlen); | |
5f5c8ee5 GM |
5331 | olen = nlen; |
5332 | } | |
bd9e3e75 | 5333 | } |
5f5c8ee5 GM |
5334 | |
5335 | just_erase: | |
5336 | /* If any unerased characters remain after the new line, erase them. */ | |
5337 | if (olen > nlen) | |
078b3696 | 5338 | { |
385ed61f KL |
5339 | cursor_to (f, vpos, nlen); |
5340 | clear_end_of_line (f, olen); | |
078b3696 | 5341 | } |
5f5c8ee5 GM |
5342 | |
5343 | /* Exchange contents between current_frame and new_frame. */ | |
5344 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5345 | } |
5f5c8ee5 GM |
5346 | |
5347 | ||
078b3696 | 5348 | \f |
5f5c8ee5 GM |
5349 | /*********************************************************************** |
5350 | X/Y Position -> Buffer Position | |
5351 | ***********************************************************************/ | |
5352 | ||
a1b0a6db | 5353 | /* Determine what's under window-relative pixel position (*X, *Y). |
2396cbba | 5354 | Return the OBJECT (string or buffer) that's there. |
6b61353c | 5355 | Return in *POS the position in that object. |
2396cbba EZ |
5356 | Adjust *X and *Y to character positions. |
5357 | Return in *DX and *DY the pixel coordinates of the click, | |
5358 | relative to the top left corner of OBJECT, or relative to | |
5359 | the top left corner of the character glyph at (*X, *Y) | |
5360 | if OBJECT is nil. | |
5361 | Return WIDTH and HEIGHT of the object at (*X, *Y), or zero | |
5362 | if the coordinates point to an empty area of the display. */ | |
5f5c8ee5 | 5363 | |
6b61353c | 5364 | Lisp_Object |
971de7fb | 5365 | 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 | 5366 | { |
5f5c8ee5 | 5367 | struct it it; |
707ea971 | 5368 | Lisp_Object old_current_buffer = Fcurrent_buffer (); |
5f5c8ee5 | 5369 | struct text_pos startp; |
6b61353c KH |
5370 | Lisp_Object string; |
5371 | struct glyph_row *row; | |
cedd7cd9 KS |
5372 | #ifdef HAVE_WINDOW_SYSTEM |
5373 | struct image *img = 0; | |
5374 | #endif | |
2396cbba | 5375 | int x0, x1, to_x; |
5f5c8ee5 | 5376 | |
707ea971 CY |
5377 | /* We used to set current_buffer directly here, but that does the |
5378 | wrong thing with `face-remapping-alist' (bug#2044). */ | |
5379 | Fset_buffer (w->buffer); | |
5f5c8ee5 GM |
5380 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
5381 | CHARPOS (startp) = min (ZV, max (BEGV, CHARPOS (startp))); | |
5382 | BYTEPOS (startp) = min (ZV_BYTE, max (BEGV_BYTE, BYTEPOS (startp))); | |
5383 | start_display (&it, w, startp); | |
177c0ea7 | 5384 | |
6b61353c | 5385 | x0 = *x - WINDOW_LEFT_MARGIN_WIDTH (w); |
2396cbba EZ |
5386 | |
5387 | /* First, move to the beginning of the row corresponding to *Y. We | |
5388 | need to be in that row to get the correct value of base paragraph | |
40629f17 | 5389 | direction for the text at (*X, *Y). */ |
2396cbba EZ |
5390 | move_it_to (&it, -1, 0, *y, -1, MOVE_TO_X | MOVE_TO_Y); |
5391 | ||
5392 | /* TO_X is the pixel position that the iterator will compute for the | |
40629f17 EZ |
5393 | glyph at *X. We add it.first_visible_x because iterator |
5394 | positions include the hscroll. */ | |
2396cbba EZ |
5395 | to_x = x0 + it.first_visible_x; |
5396 | if (it.bidi_it.paragraph_dir == R2L) | |
5397 | /* For lines in an R2L paragraph, we need to mirror TO_X wrt the | |
5398 | text area. This is because the iterator, even in R2L | |
5399 | paragraphs, delivers glyphs as if they started at the left | |
5400 | margin of the window. (When we actually produce glyphs for | |
5401 | display, we reverse their order in PRODUCE_GLYPHS, but the | |
5402 | iterator doesn't know about that.) The following line adjusts | |
5403 | the pixel position to the iterator geometry, which is what | |
40629f17 EZ |
5404 | move_it_* routines use. (The -1 is because in a window whose |
5405 | text-area width is W, the rightmost pixel position is W-1, and | |
5406 | it should be mirrored into zero pixel position.) */ | |
5407 | to_x = window_box_width (w, TEXT_AREA) - to_x - 1; | |
5408 | ||
5409 | /* Now move horizontally in the row to the glyph under *X. Second | |
5410 | argument is ZV to prevent move_it_in_display_line from matching | |
5411 | based on buffer positions. */ | |
2396cbba | 5412 | move_it_in_display_line (&it, ZV, to_x, MOVE_TO_X); |
177c0ea7 | 5413 | |
707ea971 | 5414 | Fset_buffer (old_current_buffer); |
a1b0a6db | 5415 | |
6b61353c KH |
5416 | *dx = x0 + it.first_visible_x - it.current_x; |
5417 | *dy = *y - it.current_y; | |
5418 | ||
5419 | string = w->buffer; | |
5420 | if (STRINGP (it.string)) | |
5421 | string = it.string; | |
a1b0a6db | 5422 | *pos = it.current; |
6b61353c KH |
5423 | |
5424 | #ifdef HAVE_WINDOW_SYSTEM | |
5425 | if (it.what == IT_IMAGE) | |
5426 | { | |
6b61353c KH |
5427 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5428 | && !NILP (img->spec)) | |
5429 | *object = img->spec; | |
5430 | } | |
5431 | #endif | |
5432 | ||
b70d98e1 KS |
5433 | if (it.vpos < w->current_matrix->nrows |
5434 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5435 | row->enabled_p)) | |
6b61353c KH |
5436 | { |
5437 | if (it.hpos < row->used[TEXT_AREA]) | |
5438 | { | |
5439 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6b61353c | 5440 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5441 | if (img) |
5442 | { | |
5443 | *dy -= row->ascent - glyph->ascent; | |
5444 | *dx += glyph->slice.x; | |
5445 | *dy += glyph->slice.y; | |
5446 | /* Image slices positions are still relative to the entire image */ | |
5447 | *width = img->width; | |
5448 | *height = img->height; | |
5449 | } | |
5450 | else | |
6b61353c | 5451 | #endif |
cedd7cd9 KS |
5452 | { |
5453 | *width = glyph->pixel_width; | |
5454 | *height = glyph->ascent + glyph->descent; | |
5455 | } | |
6b61353c KH |
5456 | } |
5457 | else | |
5458 | { | |
5459 | *width = 0; | |
5460 | *height = row->height; | |
5461 | } | |
5462 | } | |
5463 | else | |
5464 | { | |
5465 | *width = *height = 0; | |
5466 | } | |
5467 | ||
5468 | /* Add extra (default width) columns if clicked after EOL. */ | |
5469 | x1 = max(0, it.current_x + it.pixel_width - it.first_visible_x); | |
5470 | if (x0 > x1) | |
5471 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5472 | ||
5473 | *x = it.hpos; | |
5474 | *y = it.vpos; | |
5475 | ||
5476 | return string; | |
5f5c8ee5 | 5477 | } |
4588ec20 | 5478 | |
5f5c8ee5 GM |
5479 | |
5480 | /* Value is the string under window-relative coordinates X/Y in the | |
6b61353c KH |
5481 | mode line or header line (PART says which) of window W, or nil if none. |
5482 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
5483 | |
5484 | Lisp_Object | |
971de7fb | 5485 | 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 |
5486 | { |
5487 | struct glyph_row *row; | |
5488 | struct glyph *glyph, *end; | |
6b61353c | 5489 | int x0, y0; |
5f5c8ee5 GM |
5490 | Lisp_Object string = Qnil; |
5491 | ||
641bdbf3 | 5492 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
5493 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
5494 | else | |
045dee35 | 5495 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
6b61353c KH |
5496 | y0 = *y - row->y; |
5497 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
5f5c8ee5 GM |
5498 | |
5499 | if (row->mode_line_p && row->enabled_p) | |
4588ec20 | 5500 | { |
5f5c8ee5 GM |
5501 | /* Find the glyph under X. If we find one with a string object, |
5502 | it's the one we were looking for. */ | |
5503 | glyph = row->glyphs[TEXT_AREA]; | |
5504 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 5505 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5506 | x0 -= glyph->pixel_width; |
5507 | *x = glyph - row->glyphs[TEXT_AREA]; | |
5508 | if (glyph < end) | |
5509 | { | |
5510 | string = glyph->object; | |
5511 | *charpos = glyph->charpos; | |
5512 | *width = glyph->pixel_width; | |
5513 | *height = glyph->ascent + glyph->descent; | |
5514 | #ifdef HAVE_WINDOW_SYSTEM | |
5515 | if (glyph->type == IMAGE_GLYPH) | |
5516 | { | |
5517 | struct image *img; | |
5518 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5519 | if (img != NULL) | |
5520 | *object = img->spec; | |
5521 | y0 -= row->ascent - glyph->ascent; | |
5522 | } | |
5523 | #endif | |
5524 | } | |
5525 | else | |
5526 | { | |
5527 | /* Add extra (default width) columns if clicked after EOL. */ | |
5528 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5529 | *width = 0; | |
5530 | *height = row->height; | |
5531 | } | |
5532 | } | |
5533 | else | |
5534 | { | |
5535 | *x = 0; | |
5536 | x0 = 0; | |
5537 | *width = *height = 0; | |
4588ec20 | 5538 | } |
5f5c8ee5 | 5539 | |
6b61353c KH |
5540 | *dx = x0; |
5541 | *dy = y0; | |
5542 | ||
5f5c8ee5 | 5543 | return string; |
4588ec20 | 5544 | } |
5f5c8ee5 GM |
5545 | |
5546 | ||
db1db309 GM |
5547 | /* Value is the string under window-relative coordinates X/Y in either |
5548 | marginal area, or nil if none. *CHARPOS is set to the position in | |
5549 | the string returned. */ | |
5550 | ||
5551 | Lisp_Object | |
971de7fb | 5552 | 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 |
5553 | { |
5554 | struct glyph_row *row = w->current_matrix->rows; | |
5555 | struct glyph *glyph, *end; | |
6b61353c | 5556 | int x0, y0, i, wy = *y; |
641bdbf3 | 5557 | int area; |
db1db309 GM |
5558 | Lisp_Object string = Qnil; |
5559 | ||
641bdbf3 | 5560 | if (part == ON_LEFT_MARGIN) |
db1db309 | 5561 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 5562 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
5563 | area = RIGHT_MARGIN_AREA; |
5564 | else | |
5565 | abort (); | |
5566 | ||
5567 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
5568 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
5569 | break; | |
6b61353c KH |
5570 | y0 = *y - row->y; |
5571 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
db1db309 GM |
5572 | |
5573 | if (row->enabled_p) | |
5574 | { | |
5575 | /* Find the glyph under X. If we find one with a string object, | |
5576 | it's the one we were looking for. */ | |
db1db309 | 5577 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 5578 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5579 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5580 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) |
5581 | + window_box_width (w, LEFT_MARGIN_AREA) | |
5582 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 5583 | else |
7df02016 | 5584 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5585 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5586 | : 0); |
5587 | ||
6b61353c KH |
5588 | glyph = row->glyphs[area]; |
5589 | end = glyph + row->used[area]; | |
cfde341f | 5590 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5591 | x0 -= glyph->pixel_width; |
5592 | *x = glyph - row->glyphs[area]; | |
5593 | if (glyph < end) | |
5594 | { | |
5595 | string = glyph->object; | |
5596 | *charpos = glyph->charpos; | |
5597 | *width = glyph->pixel_width; | |
5598 | *height = glyph->ascent + glyph->descent; | |
5599 | #ifdef HAVE_WINDOW_SYSTEM | |
5600 | if (glyph->type == IMAGE_GLYPH) | |
5601 | { | |
5602 | struct image *img; | |
5603 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5604 | if (img != NULL) | |
5605 | *object = img->spec; | |
5606 | y0 -= row->ascent - glyph->ascent; | |
cedd7cd9 KS |
5607 | x0 += glyph->slice.x; |
5608 | y0 += glyph->slice.y; | |
6b61353c KH |
5609 | } |
5610 | #endif | |
5611 | } | |
5612 | else | |
5613 | { | |
5614 | /* Add extra (default width) columns if clicked after EOL. */ | |
5615 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5616 | *width = 0; | |
5617 | *height = row->height; | |
5618 | } | |
db1db309 | 5619 | } |
6b61353c KH |
5620 | else |
5621 | { | |
5622 | x0 = 0; | |
5623 | *x = 0; | |
5624 | *width = *height = 0; | |
5625 | } | |
5626 | ||
5627 | *dx = x0; | |
5628 | *dy = y0; | |
db1db309 GM |
5629 | |
5630 | return string; | |
5631 | } | |
5632 | ||
5633 | ||
5f5c8ee5 GM |
5634 | /*********************************************************************** |
5635 | Changing Frame Sizes | |
5636 | ***********************************************************************/ | |
4588ec20 JB |
5637 | |
5638 | #ifdef SIGWINCH | |
5f5c8ee5 | 5639 | |
efb859b4 | 5640 | SIGTYPE |
971de7fb DN |
5641 | window_change_signal (int signalnum) /* If we don't have an argument, */ |
5642 | /* some compilers complain in signal calls. */ | |
4588ec20 JB |
5643 | { |
5644 | int width, height; | |
4588ec20 JB |
5645 | int old_errno = errno; |
5646 | ||
28d7d09f | 5647 | struct tty_display_info *tty; |
4d553a13 | 5648 | |
333f1b6f JD |
5649 | signal (SIGWINCH, window_change_signal); |
5650 | SIGNAL_THREAD_CHECK (signalnum); | |
5651 | ||
9628b887 KL |
5652 | /* The frame size change obviously applies to a single |
5653 | termcap-controlled terminal, but we can't decide which. | |
5654 | Therefore, we resize the frames corresponding to each tty. | |
9628b887 KL |
5655 | */ |
5656 | for (tty = tty_list; tty; tty = tty->next) { | |
4588ec20 | 5657 | |
0a125897 KL |
5658 | if (! tty->term_initted) |
5659 | continue; | |
4588ec20 | 5660 | |
db878925 DN |
5661 | /* Suspended tty frames have tty->input == NULL avoid trying to |
5662 | use it. */ | |
5663 | if (!tty->input) | |
5664 | continue; | |
5665 | ||
0b0d3e0b | 5666 | get_tty_size (fileno (tty->input), &width, &height); |
3fc809e2 | 5667 | |
bedeffcf | 5668 | if (width > 5 && height > 2) { |
9628b887 | 5669 | Lisp_Object tail, frame; |
3fc809e2 | 5670 | |
9628b887 | 5671 | FOR_EACH_FRAME (tail, frame) |
4d553a13 KL |
5672 | if (FRAME_TERMCAP_P (XFRAME (frame)) && FRAME_TTY (XFRAME (frame)) == tty) |
5673 | /* Record the new sizes, but don't reallocate the data | |
5674 | structures now. Let that be done later outside of the | |
5675 | signal handler. */ | |
5676 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); | |
9628b887 | 5677 | } |
4588ec20 | 5678 | } |
3fc809e2 | 5679 | |
4588ec20 JB |
5680 | errno = old_errno; |
5681 | } | |
5682 | #endif /* SIGWINCH */ | |
5683 | ||
5684 | ||
b96fd3e8 GM |
5685 | /* Do any change in frame size that was requested by a signal. SAFE |
5686 | non-zero means this function is called from a place where it is | |
5687 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 5688 | |
dfcf069d | 5689 | void |
971de7fb | 5690 | do_pending_window_change (int safe) |
4588ec20 JB |
5691 | { |
5692 | /* If window_change_signal should have run before, run it now. */ | |
b96fd3e8 GM |
5693 | if (redisplaying_p && !safe) |
5694 | return; | |
177c0ea7 | 5695 | |
4588ec20 JB |
5696 | while (delayed_size_change) |
5697 | { | |
35f56f96 | 5698 | Lisp_Object tail, frame; |
4588ec20 JB |
5699 | |
5700 | delayed_size_change = 0; | |
5701 | ||
35f56f96 | 5702 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5703 | { |
5f5c8ee5 | 5704 | struct frame *f = XFRAME (frame); |
35f56f96 | 5705 | |
7df02016 KS |
5706 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
5707 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
5708 | 0, 0, safe); | |
4588ec20 JB |
5709 | } |
5710 | } | |
5711 | } | |
5712 | ||
5713 | ||
502b9b64 | 5714 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 5715 | indicate no change is to take place. |
4588ec20 | 5716 | |
b6a65ac2 JB |
5717 | If DELAY is non-zero, then assume we're being called from a signal |
5718 | handler, and queue the change for later - perhaps the next | |
5719 | redisplay. Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
5720 | from a signal handler. |
5721 | ||
5722 | SAFE non-zero means this function is called from a place where it's | |
5723 | safe to change frame sizes while a redisplay is in progress. */ | |
b6a65ac2 | 5724 | |
dfcf069d | 5725 | void |
971de7fb | 5726 | change_frame_size (register struct frame *f, int newheight, int newwidth, int pretend, int delay, int safe) |
45140e01 RS |
5727 | { |
5728 | Lisp_Object tail, frame; | |
3826ea1a | 5729 | |
9628b887 | 5730 | if (FRAME_MSDOS_P (f)) |
45140e01 | 5731 | { |
9628b887 KL |
5732 | /* On MS-DOS, all frames use the same screen, so a change in |
5733 | size affects all frames. Termcap now supports multiple | |
5734 | ttys. */ | |
45140e01 | 5735 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 5736 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 5737 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 5738 | pretend, delay, safe); |
45140e01 RS |
5739 | } |
5740 | else | |
b96fd3e8 | 5741 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
5742 | } |
5743 | ||
5744 | static void | |
971de7fb | 5745 | change_frame_size_1 (register struct frame *f, int newheight, int newwidth, int pretend, int delay, int safe) |
4588ec20 | 5746 | { |
7df02016 | 5747 | int new_frame_total_cols; |
aed13378 | 5748 | int count = SPECPDL_INDEX (); |
3826ea1a | 5749 | |
4588ec20 | 5750 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 5751 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 5752 | { |
7df02016 KS |
5753 | f->new_text_lines = newheight; |
5754 | f->new_text_cols = newwidth; | |
4588ec20 JB |
5755 | delayed_size_change = 1; |
5756 | return; | |
5757 | } | |
5758 | ||
502b9b64 | 5759 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
5760 | f->new_text_lines = 0; |
5761 | f->new_text_cols = 0; | |
b6a65ac2 | 5762 | |
08f7aa3e | 5763 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 5764 | if (newheight == 0) |
7df02016 | 5765 | newheight = FRAME_LINES (f); |
ae19c6f2 | 5766 | if (newwidth == 0) |
7df02016 | 5767 | newwidth = FRAME_COLS (f); |
3826ea1a | 5768 | |
5f5c8ee5 GM |
5769 | /* Compute width of windows in F. |
5770 | This is the width of the frame without vertical scroll bars. */ | |
7df02016 | 5771 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); |
3826ea1a | 5772 | |
b6a65ac2 | 5773 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 5774 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 JB |
5775 | |
5776 | /* If we're not changing the frame size, quit now. */ | |
5075d853 JD |
5777 | /* Frame width may be unchanged but the text portion may change, for example, |
5778 | fullscreen and remove/add scroll bar. */ | |
7df02016 | 5779 | if (newheight == FRAME_LINES (f) |
5075d853 JD |
5780 | && newwidth == FRAME_COLS (f) // text portion unchanged |
5781 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) // frame width unchanged | |
4588ec20 JB |
5782 | return; |
5783 | ||
cbb95688 RS |
5784 | BLOCK_INPUT; |
5785 | ||
886a8a6c KH |
5786 | #ifdef MSDOS |
5787 | /* We only can set screen dimensions to certain values supported | |
5788 | by our video hardware. Try to find the smallest size greater | |
5789 | or equal to the requested dimensions. */ | |
5790 | dos_set_window_size (&newheight, &newwidth); | |
5791 | #endif | |
5792 | ||
7df02016 | 5793 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 5794 | { |
5f5c8ee5 | 5795 | if (FRAME_HAS_MINIBUF_P (f) && !FRAME_MINIBUF_ONLY_P (f)) |
4588ec20 | 5796 | { |
5f5c8ee5 | 5797 | /* Frame has both root and mini-buffer. */ |
7df02016 | 5798 | XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f))->top_line, |
5f5c8ee5 GM |
5799 | FRAME_TOP_MARGIN (f)); |
5800 | set_window_height (FRAME_ROOT_WINDOW (f), | |
5801 | (newheight | |
5802 | - 1 | |
5803 | - FRAME_TOP_MARGIN (f)), | |
f8748f0f | 5804 | 2); |
7df02016 | 5805 | XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top_line, |
a5d8b611 | 5806 | newheight - 1); |
5f5c8ee5 | 5807 | set_window_height (FRAME_MINIBUF_WINDOW (f), 1, 0); |
4588ec20 JB |
5808 | } |
5809 | else | |
502b9b64 | 5810 | /* Frame has just one top-level window. */ |
5f5c8ee5 | 5811 | set_window_height (FRAME_ROOT_WINDOW (f), |
f8748f0f | 5812 | newheight - FRAME_TOP_MARGIN (f), 2); |
b6a65ac2 | 5813 | |
48e482e6 EZ |
5814 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5815 | manipulating video hardware. */ | |
5816 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5817 | FrameRows (FRAME_TTY (f)) = newheight; |
4588ec20 JB |
5818 | } |
5819 | ||
7df02016 | 5820 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 5821 | { |
f8748f0f | 5822 | set_window_width (FRAME_ROOT_WINDOW (f), new_frame_total_cols, 2); |
5f5c8ee5 | 5823 | if (FRAME_HAS_MINIBUF_P (f)) |
7df02016 | 5824 | set_window_width (FRAME_MINIBUF_WINDOW (f), new_frame_total_cols, 0); |
4588ec20 | 5825 | |
48e482e6 EZ |
5826 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5827 | manipulating video hardware. */ | |
5828 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5829 | FrameCols (FRAME_TTY (f)) = newwidth; |
5f5c8ee5 | 5830 | |
9ea173e8 | 5831 | if (WINDOWP (f->tool_bar_window)) |
7df02016 | 5832 | XSETFASTINT (XWINDOW (f->tool_bar_window)->total_cols, newwidth); |
4588ec20 JB |
5833 | } |
5834 | ||
7df02016 KS |
5835 | FRAME_LINES (f) = newheight; |
5836 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 5837 | |
5f5c8ee5 GM |
5838 | { |
5839 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
5840 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 5841 | |
5f5c8ee5 GM |
5842 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
5843 | &text_area_height); | |
5844 | if (w->cursor.x >= text_area_x + text_area_width) | |
5845 | w->cursor.hpos = w->cursor.x = 0; | |
5846 | if (w->cursor.y >= text_area_y + text_area_height) | |
5847 | w->cursor.vpos = w->cursor.y = 0; | |
5848 | } | |
986e61b8 | 5849 | |
5f5c8ee5 | 5850 | adjust_glyphs (f); |
5f5c8ee5 | 5851 | calculate_costs (f); |
cb02fa39 GM |
5852 | SET_FRAME_GARBAGED (f); |
5853 | f->resized_p = 1; | |
97cf50e7 RS |
5854 | |
5855 | UNBLOCK_INPUT; | |
61730a69 | 5856 | |
e523f7e5 RS |
5857 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); |
5858 | ||
ef264c42 | 5859 | run_window_configuration_change_hook (f); |
e523f7e5 RS |
5860 | |
5861 | unbind_to (count, Qnil); | |
4588ec20 | 5862 | } |
5f5c8ee5 GM |
5863 | |
5864 | ||
4588ec20 | 5865 | \f |
5f5c8ee5 GM |
5866 | /*********************************************************************** |
5867 | Terminal Related Lisp Functions | |
5868 | ***********************************************************************/ | |
5869 | ||
5870 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 5871 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
5872 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
5873 | FILE = nil means just close any termscript file currently open. */) | |
5842a27b | 5874 | (Lisp_Object file) |
5f5c8ee5 | 5875 | { |
0b0d3e0b KL |
5876 | struct tty_display_info *tty; |
5877 | ||
7d2f1216 EZ |
5878 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ()) |
5879 | && ! FRAME_MSDOS_P (SELECTED_FRAME ())) | |
0b0d3e0b KL |
5880 | error ("Current frame is not on a tty device"); |
5881 | ||
5882 | tty = CURTTY (); | |
5883 | ||
5884 | if (tty->termscript != 0) | |
e18c7093 KL |
5885 | { |
5886 | BLOCK_INPUT; | |
0b0d3e0b | 5887 | fclose (tty->termscript); |
e18c7093 KL |
5888 | UNBLOCK_INPUT; |
5889 | } | |
0b0d3e0b | 5890 | tty->termscript = 0; |
5f5c8ee5 GM |
5891 | |
5892 | if (! NILP (file)) | |
5893 | { | |
5894 | file = Fexpand_file_name (file, Qnil); | |
0b0d3e0b KL |
5895 | tty->termscript = fopen (SDATA (file), "w"); |
5896 | if (tty->termscript == 0) | |
5f5c8ee5 GM |
5897 | report_file_error ("Opening termscript", Fcons (file, Qnil)); |
5898 | } | |
5899 | return Qnil; | |
5900 | } | |
5901 | ||
5902 | ||
4588ec20 | 5903 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
62af879c | 5904 | Ssend_string_to_terminal, 1, 2, 0, |
7ee72033 | 5905 | doc: /* Send STRING to the terminal without alteration. |
62af879c KL |
5906 | Control characters in STRING will have terminal-dependent effects. |
5907 | ||
6ed8eeff | 5908 | Optional parameter TERMINAL specifies the tty terminal device to use. |
558759e4 AM |
5909 | It may be a terminal object, a frame, or nil for the terminal used by |
5910 | the currently selected frame. In batch mode, STRING is sent to stdout | |
5911 | when TERMINAL is nil. */) | |
5842a27b | 5912 | (Lisp_Object string, Lisp_Object terminal) |
4588ec20 | 5913 | { |
7cef7ce3 SM |
5914 | struct terminal *t = get_terminal (terminal, 1); |
5915 | FILE *out; | |
0b0d3e0b | 5916 | |
94f3db62 | 5917 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 5918 | CHECK_STRING (string); |
2c1e4409 | 5919 | BLOCK_INPUT; |
0b0d3e0b | 5920 | |
6ed8eeff KL |
5921 | if (!t) |
5922 | error ("Unknown terminal device"); | |
0b0d3e0b | 5923 | |
7cef7ce3 SM |
5924 | if (t->type == output_initial) |
5925 | out = stdout; | |
5926 | else if (t->type != output_termcap && t->type != output_msdos_raw) | |
5927 | error ("Device %d is not a termcap terminal device", t->id); | |
5928 | else | |
5929 | { | |
5930 | struct tty_display_info *tty = t->display_info.tty; | |
3fc809e2 | 5931 | |
7cef7ce3 SM |
5932 | if (! tty->output) |
5933 | error ("Terminal is currently suspended"); | |
cecfdea6 | 5934 | |
7cef7ce3 SM |
5935 | if (tty->termscript) |
5936 | { | |
5937 | fwrite (SDATA (string), 1, SBYTES (string), tty->termscript); | |
5938 | fflush (tty->termscript); | |
5939 | } | |
5940 | out = tty->output; | |
4588ec20 | 5941 | } |
7cef7ce3 SM |
5942 | fwrite (SDATA (string), 1, SBYTES (string), out); |
5943 | fflush (out); | |
2c1e4409 | 5944 | UNBLOCK_INPUT; |
4588ec20 JB |
5945 | return Qnil; |
5946 | } | |
5947 | ||
5f5c8ee5 | 5948 | |
4588ec20 | 5949 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 5950 | doc: /* Beep, or flash the screen. |
228299fa | 5951 | Also, unless an argument is given, |
7ee72033 | 5952 | terminate any keyboard macro currently executing. */) |
5842a27b | 5953 | (Lisp_Object arg) |
4588ec20 | 5954 | { |
efb859b4 | 5955 | if (!NILP (arg)) |
4588ec20 | 5956 | { |
7fa788da RS |
5957 | if (noninteractive) |
5958 | putchar (07); | |
5959 | else | |
385ed61f | 5960 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5961 | } |
5962 | else | |
5963 | bitch_at_user (); | |
5964 | ||
5965 | return Qnil; | |
5966 | } | |
5967 | ||
dfcf069d | 5968 | void |
971de7fb | 5969 | bitch_at_user (void) |
4588ec20 JB |
5970 | { |
5971 | if (noninteractive) | |
5972 | putchar (07); | |
5f5c8ee5 | 5973 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
4588ec20 JB |
5974 | error ("Keyboard macro terminated by a command ringing the bell"); |
5975 | else | |
385ed61f | 5976 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5977 | } |
5978 | ||
5f5c8ee5 GM |
5979 | |
5980 | \f | |
5981 | /*********************************************************************** | |
5982 | Sleeping, Waiting | |
5983 | ***********************************************************************/ | |
5984 | ||
4588ec20 | 5985 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 5986 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
5987 | SECONDS may be a floating-point value, meaning that you can wait for a |
5988 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
5989 | additional wait period, in milliseconds; this may be useful if your | |
5990 | Emacs was built without floating point support. | |
7ee72033 | 5991 | \(Not all operating systems support waiting for a fraction of a second.) */) |
5842a27b | 5992 | (Lisp_Object seconds, Lisp_Object milliseconds) |
4588ec20 | 5993 | { |
767229f8 | 5994 | int sec, usec; |
4588ec20 | 5995 | |
767229f8 | 5996 | if (NILP (milliseconds)) |
e9c9a718 | 5997 | XSETINT (milliseconds, 0); |
767229f8 | 5998 | else |
b7826503 | 5999 | CHECK_NUMBER (milliseconds); |
b07646f5 JB |
6000 | usec = XINT (milliseconds) * 1000; |
6001 | ||
b07646f5 JB |
6002 | { |
6003 | double duration = extract_float (seconds); | |
6004 | sec = (int) duration; | |
6005 | usec += (duration - sec) * 1000000; | |
6006 | } | |
4588ec20 | 6007 | |
a41f8bed | 6008 | #ifndef EMACS_HAS_USECS |
767229f8 | 6009 | if (sec == 0 && usec != 0) |
861e19b9 | 6010 | error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); |
4588ec20 | 6011 | #endif |
767229f8 JB |
6012 | |
6013 | /* Assure that 0 <= usec < 1000000. */ | |
6014 | if (usec < 0) | |
6015 | { | |
153a073c | 6016 | /* We can't rely on the rounding being correct if usec is negative. */ |
767229f8 JB |
6017 | if (-1000000 < usec) |
6018 | sec--, usec += 1000000; | |
6019 | else | |
6020 | sec -= -usec / 1000000, usec = 1000000 - (-usec % 1000000); | |
4588ec20 | 6021 | } |
767229f8 JB |
6022 | else |
6023 | sec += usec / 1000000, usec %= 1000000; | |
6024 | ||
6b5153b1 | 6025 | if (sec < 0 || (sec == 0 && usec == 0)) |
767229f8 | 6026 | return Qnil; |
4588ec20 | 6027 | |
dcd1ca45 | 6028 | wait_reading_process_output (sec, usec, 0, 0, Qnil, NULL, 0); |
4588ec20 JB |
6029 | |
6030 | return Qnil; | |
6031 | } | |
6032 | ||
5f5c8ee5 | 6033 | |
dcd1ca45 | 6034 | /* This is just like wait_reading_process_output, except that |
902b9b6d | 6035 | it does redisplay. |
f76475ad | 6036 | |
2bcac766 CY |
6037 | TIMEOUT is number of seconds to wait (float or integer), |
6038 | or t to wait forever. | |
902b9b6d KS |
6039 | READING is 1 if reading input. |
6040 | If DO_DISPLAY is >0 display process output while waiting. | |
6041 | If DO_DISPLAY is >1 perform an initial redisplay before waiting. | |
6042 | */ | |
4588ec20 | 6043 | |
f76475ad | 6044 | Lisp_Object |
971de7fb | 6045 | sit_for (Lisp_Object timeout, int reading, int do_display) |
f76475ad | 6046 | { |
902b9b6d | 6047 | int sec, usec; |
f222369e | 6048 | |
902b9b6d | 6049 | swallow_events (do_display); |
ccddf474 | 6050 | |
902b9b6d | 6051 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 6052 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 6053 | return Qnil; |
4588ec20 | 6054 | |
902b9b6d KS |
6055 | if (do_display >= 2) |
6056 | redisplay_preserve_echo_area (2); | |
6057 | ||
8e09f23f | 6058 | if (INTEGERP (timeout)) |
f222369e | 6059 | { |
7ff14773 | 6060 | sec = XINT (timeout); |
8e09f23f | 6061 | usec = 0; |
f222369e | 6062 | } |
8e09f23f KS |
6063 | else if (FLOATP (timeout)) |
6064 | { | |
99a20368 | 6065 | double seconds = XFLOAT_DATA (timeout); |
902b9b6d KS |
6066 | sec = (int) seconds; |
6067 | usec = (int) ((seconds - sec) * 1000000); | |
6068 | } | |
2bcac766 CY |
6069 | else if (EQ (timeout, Qt)) |
6070 | { | |
6071 | sec = 0; | |
6072 | usec = 0; | |
6073 | } | |
902b9b6d | 6074 | else |
8e09f23f | 6075 | wrong_type_argument (Qnumberp, timeout); |
4588ec20 | 6076 | |
2bcac766 | 6077 | if (sec == 0 && usec == 0 && !EQ (timeout, Qt)) |
dfdb645c JB |
6078 | return Qt; |
6079 | ||
4588ec20 | 6080 | #ifdef SIGIO |
8fc798e9 | 6081 | gobble_input (0); |
f76475ad JB |
6082 | #endif |
6083 | ||
902b9b6d | 6084 | wait_reading_process_output (sec, usec, reading ? -1 : 1, do_display, |
dcd1ca45 | 6085 | Qnil, NULL, 0); |
f76475ad | 6086 | |
4588ec20 JB |
6087 | return detect_input_pending () ? Qnil : Qt; |
6088 | } | |
6089 | ||
5f5c8ee5 | 6090 | |
01327edf KS |
6091 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
6092 | doc: /* Perform redisplay if no input is available. | |
a5c2c707 | 6093 | If optional arg FORCE is non-nil or `redisplay-dont-pause' is non-nil, |
03240971 KS |
6094 | perform a full redisplay even if input is available. |
6095 | Return t if redisplay was performed, nil otherwise. */) | |
5842a27b | 6096 | (Lisp_Object force) |
f76475ad | 6097 | { |
01327edf | 6098 | int count; |
659d9874 | 6099 | |
902b9b6d KS |
6100 | swallow_events (1); |
6101 | if ((detect_input_pending_run_timers (1) | |
01327edf | 6102 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
6103 | || !NILP (Vexecuting_kbd_macro)) |
6104 | return Qnil; | |
f76475ad | 6105 | |
01327edf KS |
6106 | count = SPECPDL_INDEX (); |
6107 | if (!NILP (force) && !redisplay_dont_pause) | |
6108 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 6109 | redisplay_preserve_echo_area (2); |
01327edf | 6110 | unbind_to (count, Qnil); |
7ba07a1a | 6111 | return Qt; |
f76475ad | 6112 | } |
5f5c8ee5 GM |
6113 | |
6114 | ||
6115 | \f | |
6116 | /*********************************************************************** | |
6117 | Other Lisp Functions | |
6118 | ***********************************************************************/ | |
6119 | ||
6120 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
6121 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 6122 | buffer-modified-flags. */ |
5f5c8ee5 GM |
6123 | |
6124 | static Lisp_Object frame_and_buffer_state; | |
6125 | ||
6126 | ||
6127 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 6128 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 6129 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
6130 | VARIABLE is a variable name whose value is either nil or a state vector |
6131 | that will be updated to contain all frames and buffers, | |
228299fa | 6132 | aside from buffers whose names start with space, |
44edd521 RS |
6133 | along with the buffers' read-only and modified flags. This allows a fast |
6134 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 6135 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
6136 | the current state. |
6137 | ||
6138 | If VARIABLE is nil, an internal variable is used. Users should not | |
6139 | pass nil for VARIABLE. */) | |
5842a27b | 6140 | (Lisp_Object variable) |
5f5c8ee5 | 6141 | { |
44edd521 RS |
6142 | Lisp_Object state, tail, frame, buf; |
6143 | Lisp_Object *vecp, *end; | |
5f5c8ee5 GM |
6144 | int n; |
6145 | ||
44edd521 RS |
6146 | if (! NILP (variable)) |
6147 | { | |
6148 | CHECK_SYMBOL (variable); | |
6149 | state = Fsymbol_value (variable); | |
6150 | if (! VECTORP (state)) | |
6151 | goto changed; | |
6152 | } | |
6153 | else | |
6154 | state = frame_and_buffer_state; | |
6155 | ||
6156 | vecp = XVECTOR (state)->contents; | |
6157 | end = vecp + XVECTOR (state)->size; | |
6158 | ||
5f5c8ee5 GM |
6159 | FOR_EACH_FRAME (tail, frame) |
6160 | { | |
44edd521 RS |
6161 | if (vecp == end) |
6162 | goto changed; | |
5f5c8ee5 GM |
6163 | if (!EQ (*vecp++, frame)) |
6164 | goto changed; | |
44edd521 RS |
6165 | if (vecp == end) |
6166 | goto changed; | |
5f5c8ee5 GM |
6167 | if (!EQ (*vecp++, XFRAME (frame)->name)) |
6168 | goto changed; | |
6169 | } | |
44edd521 | 6170 | /* Check that the buffer info matches. */ |
7539e11f | 6171 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6172 | { |
7539e11f | 6173 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6174 | /* Ignore buffers that aren't included in buffer lists. */ |
d5db4077 | 6175 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
5f5c8ee5 | 6176 | continue; |
44edd521 RS |
6177 | if (vecp == end) |
6178 | goto changed; | |
5f5c8ee5 GM |
6179 | if (!EQ (*vecp++, buf)) |
6180 | goto changed; | |
44edd521 RS |
6181 | if (vecp == end) |
6182 | goto changed; | |
5f5c8ee5 GM |
6183 | if (!EQ (*vecp++, XBUFFER (buf)->read_only)) |
6184 | goto changed; | |
44edd521 RS |
6185 | if (vecp == end) |
6186 | goto changed; | |
5f5c8ee5 GM |
6187 | if (!EQ (*vecp++, Fbuffer_modified_p (buf))) |
6188 | goto changed; | |
6189 | } | |
44edd521 RS |
6190 | if (vecp == end) |
6191 | goto changed; | |
5f5c8ee5 GM |
6192 | /* Detect deletion of a buffer at the end of the list. */ |
6193 | if (EQ (*vecp, Qlambda)) | |
6194 | return Qnil; | |
44edd521 RS |
6195 | |
6196 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 6197 | changed: |
44edd521 RS |
6198 | /* Count the size we will need. |
6199 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
6200 | n = 1; |
6201 | FOR_EACH_FRAME (tail, frame) | |
6202 | n += 2; | |
7539e11f | 6203 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6204 | n += 3; |
44edd521 RS |
6205 | /* Reallocate the vector if data has grown to need it, |
6206 | or if it has shrunk a lot. */ | |
6207 | if (! VECTORP (state) | |
6208 | || n > XVECTOR (state)->size | |
6209 | || n + 20 < XVECTOR (state)->size / 2) | |
5f5c8ee5 | 6210 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
6211 | { |
6212 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
6213 | if (! NILP (variable)) | |
6214 | Fset (variable, state); | |
6215 | else | |
6216 | frame_and_buffer_state = state; | |
6217 | } | |
6218 | ||
6219 | /* Record the new data in the (possibly reallocated) vector. */ | |
6220 | vecp = XVECTOR (state)->contents; | |
5f5c8ee5 GM |
6221 | FOR_EACH_FRAME (tail, frame) |
6222 | { | |
6223 | *vecp++ = frame; | |
6224 | *vecp++ = XFRAME (frame)->name; | |
6225 | } | |
7539e11f | 6226 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6227 | { |
7539e11f | 6228 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6229 | /* Ignore buffers that aren't included in buffer lists. */ |
d5db4077 | 6230 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
5f5c8ee5 GM |
6231 | continue; |
6232 | *vecp++ = buf; | |
6233 | *vecp++ = XBUFFER (buf)->read_only; | |
6234 | *vecp++ = Fbuffer_modified_p (buf); | |
6235 | } | |
6236 | /* Fill up the vector with lambdas (always at least one). */ | |
6237 | *vecp++ = Qlambda; | |
44edd521 RS |
6238 | while (vecp - XVECTOR (state)->contents |
6239 | < XVECTOR (state)->size) | |
5f5c8ee5 GM |
6240 | *vecp++ = Qlambda; |
6241 | /* Make sure we didn't overflow the vector. */ | |
44edd521 RS |
6242 | if (vecp - XVECTOR (state)->contents |
6243 | > XVECTOR (state)->size) | |
5f5c8ee5 GM |
6244 | abort (); |
6245 | return Qt; | |
6246 | } | |
6247 | ||
6248 | ||
4588ec20 | 6249 | \f |
5f5c8ee5 GM |
6250 | /*********************************************************************** |
6251 | Initialization | |
6252 | ***********************************************************************/ | |
6253 | ||
5f5c8ee5 GM |
6254 | /* Initialization done when Emacs fork is started, before doing stty. |
6255 | Determine terminal type and set terminal_driver. Then invoke its | |
6256 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 6257 | |
dfcf069d | 6258 | void |
971de7fb | 6259 | init_display (void) |
4588ec20 | 6260 | { |
28d440ab KL |
6261 | char *terminal_type; |
6262 | ||
5f5c8ee5 GM |
6263 | /* Construct the space glyph. */ |
6264 | space_glyph.type = CHAR_GLYPH; | |
3fc809e2 | 6265 | SET_CHAR_GLYPH (space_glyph, ' ', DEFAULT_FACE_ID, 0); |
5f5c8ee5 GM |
6266 | space_glyph.charpos = -1; |
6267 | ||
4588ec20 JB |
6268 | inverse_video = 0; |
6269 | cursor_in_echo_area = 0; | |
6270 | terminal_type = (char *) 0; | |
6271 | ||
1315c181 JB |
6272 | /* Now is the time to initialize this; it's used by init_sys_modes |
6273 | during startup. */ | |
2246281f | 6274 | Vinitial_window_system = Qnil; |
4588ec20 | 6275 | |
4181ad9c KL |
6276 | /* SIGWINCH needs to be handled no matter what display we start |
6277 | with. Otherwise newly opened tty frames will not resize | |
6278 | automatically. */ | |
6279 | #ifdef SIGWINCH | |
6280 | #ifndef CANNOT_DUMP | |
6281 | if (initialized) | |
6282 | #endif /* CANNOT_DUMP */ | |
6283 | signal (SIGWINCH, window_change_signal); | |
6284 | #endif /* SIGWINCH */ | |
4588ec20 | 6285 | |
d6ef42b9 | 6286 | /* If running as a daemon, no need to initialize any frames/terminal. */ |
ff808935 DN |
6287 | if (IS_DAEMON) |
6288 | return; | |
d6ef42b9 | 6289 | |
1315c181 JB |
6290 | /* If the user wants to use a window system, we shouldn't bother |
6291 | initializing the terminal. This is especially important when the | |
6292 | terminal is so dumb that emacs gives up before and doesn't bother | |
6293 | using the window system. | |
4588ec20 | 6294 | |
36bbad1d KH |
6295 | If the DISPLAY environment variable is set and nonempty, |
6296 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6297 | |
6298 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 6299 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 6300 | { |
36bbad1d | 6301 | char *display; |
36bbad1d | 6302 | display = getenv ("DISPLAY"); |
36bbad1d | 6303 | display_arg = (display != 0 && *display != 0); |
c1fc674b AS |
6304 | |
6305 | if (display_arg && !x_display_ok (display)) | |
6306 | { | |
6307 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
6308 | display); | |
6309 | inhibit_window_system = 1; | |
6310 | } | |
f040093a | 6311 | } |
d460af17 | 6312 | |
177c0ea7 | 6313 | if (!inhibit_window_system && display_arg |
9e4555e8 RS |
6314 | #ifndef CANNOT_DUMP |
6315 | && initialized | |
6316 | #endif | |
6317 | ) | |
4588ec20 | 6318 | { |
111d9af3 | 6319 | Vinitial_window_system = Qx; |
4588ec20 JB |
6320 | #ifdef HAVE_X11 |
6321 | Vwindow_system_version = make_number (11); | |
039e5d71 | 6322 | #endif |
8a2a6032 | 6323 | #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES) |
039e5d71 | 6324 | /* In some versions of ncurses, |
6a428f77 | 6325 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6326 | So call tgetent. */ |
6327 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 | 6328 | #endif |
5f5c8ee5 | 6329 | adjust_frame_glyphs_initially (); |
4588ec20 JB |
6330 | return; |
6331 | } | |
6332 | #endif /* HAVE_X_WINDOWS */ | |
6333 | ||
fd2e066a | 6334 | #ifdef HAVE_NTGUI |
177c0ea7 | 6335 | if (!inhibit_window_system) |
fd2e066a | 6336 | { |
111d9af3 | 6337 | Vinitial_window_system = Qw32; |
fd2e066a | 6338 | Vwindow_system_version = make_number (1); |
5f5c8ee5 | 6339 | adjust_frame_glyphs_initially (); |
fd2e066a GV |
6340 | return; |
6341 | } | |
6342 | #endif /* HAVE_NTGUI */ | |
6343 | ||
edfda783 AR |
6344 | #ifdef HAVE_NS |
6345 | if (!inhibit_window_system | |
6346 | #ifndef CANNOT_DUMP | |
6347 | && initialized | |
6348 | #endif | |
6349 | ) | |
6350 | { | |
111d9af3 | 6351 | Vinitial_window_system = Qns; |
edfda783 AR |
6352 | Vwindow_system_version = make_number(10); |
6353 | adjust_frame_glyphs_initially (); | |
6354 | return; | |
6355 | } | |
6356 | #endif | |
6357 | ||
4588ec20 JB |
6358 | /* If no window system has been specified, try to use the terminal. */ |
6359 | if (! isatty (0)) | |
6360 | { | |
1559a86d | 6361 | fatal ("standard input is not a tty"); |
4588ec20 JB |
6362 | exit (1); |
6363 | } | |
6364 | ||
6152361f JR |
6365 | #ifdef WINDOWSNT |
6366 | terminal_type = "w32console"; | |
6367 | #else | |
153a073c | 6368 | /* Look at the TERM variable. */ |
4588ec20 | 6369 | terminal_type = (char *) getenv ("TERM"); |
6152361f | 6370 | #endif |
4588ec20 JB |
6371 | if (!terminal_type) |
6372 | { | |
5d12ff0b | 6373 | #ifdef HAVE_WINDOW_SYSTEM |
b9e590fc RS |
6374 | if (! inhibit_window_system) |
6375 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6376 | else |
6377 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6378 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
4588ec20 JB |
6379 | exit (1); |
6380 | } | |
6381 | ||
0a125897 | 6382 | { |
6ed8eeff | 6383 | struct terminal *t; |
3224dac1 KL |
6384 | struct frame *f = XFRAME (selected_frame); |
6385 | ||
6386 | /* Open a display on the controlling tty. */ | |
6ed8eeff | 6387 | t = init_tty (0, terminal_type, 1); /* Errors are fatal. */ |
3224dac1 KL |
6388 | |
6389 | /* Convert the initial frame to use the new display. */ | |
b04f5ad2 | 6390 | if (f->output_method != output_initial) |
3224dac1 | 6391 | abort (); |
6ed8eeff KL |
6392 | f->output_method = t->type; |
6393 | f->terminal = t; | |
3224dac1 | 6394 | |
6ed8eeff KL |
6395 | t->reference_count++; |
6396 | t->display_info.tty->top_frame = selected_frame; | |
5b65d888 | 6397 | change_frame_size (XFRAME (selected_frame), |
6ed8eeff KL |
6398 | FrameRows (t->display_info.tty), |
6399 | FrameCols (t->display_info.tty), 0, 0, 1); | |
3224dac1 | 6400 | |
6ed8eeff KL |
6401 | /* Delete the initial terminal. */ |
6402 | if (--initial_terminal->reference_count == 0 | |
6403 | && initial_terminal->delete_terminal_hook) | |
6404 | (*initial_terminal->delete_terminal_hook) (initial_terminal); | |
2666355c KL |
6405 | |
6406 | /* Update frame parameters to reflect the new type. */ | |
6407 | Fmodify_frame_parameters | |
6408 | (selected_frame, Fcons (Fcons (Qtty_type, | |
6ed8eeff | 6409 | Ftty_type (selected_frame)), Qnil)); |
657ceaa0 EZ |
6410 | if (t->display_info.tty->name) |
6411 | Fmodify_frame_parameters (selected_frame, | |
6412 | Fcons (Fcons (Qtty, build_string (t->display_info.tty->name)), | |
6413 | Qnil)); | |
6414 | else | |
6415 | Fmodify_frame_parameters (selected_frame, Fcons (Fcons (Qtty, Qnil), | |
6416 | Qnil)); | |
0a125897 | 6417 | } |
3fc809e2 | 6418 | |
d86c299a | 6419 | { |
91fb7e1b | 6420 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6421 | int width = FRAME_TOTAL_COLS (sf); |
6422 | int height = FRAME_LINES (sf); | |
d86c299a | 6423 | |
5f5c8ee5 | 6424 | unsigned int total_glyphs = height * (width + 2) * sizeof (struct glyph); |
d86c299a | 6425 | |
5f5c8ee5 GM |
6426 | /* If these sizes are so big they cause overflow, just ignore the |
6427 | change. It's not clear what better we could do. */ | |
6428 | if (total_glyphs / sizeof (struct glyph) / height != width + 2) | |
1559a86d | 6429 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6430 | } |
6431 | ||
5f5c8ee5 | 6432 | adjust_frame_glyphs_initially (); |
91fb7e1b | 6433 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6434 | |
5f5c8ee5 GM |
6435 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ |
6436 | if (initialized | |
6437 | && !noninteractive | |
2246281f | 6438 | && NILP (Vinitial_window_system)) |
2d764c78 EZ |
6439 | { |
6440 | /* For the initial frame, we don't have any way of knowing what | |
6441 | are the foreground and background colors of the terminal. */ | |
6442 | struct frame *sf = SELECTED_FRAME(); | |
6443 | ||
f9d2fdc4 EZ |
6444 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
6445 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
6446 | call0 (intern ("tty-set-up-initial-frame-faces")); |
6447 | } | |
5f5c8ee5 GM |
6448 | } |
6449 | ||
6450 | ||
6451 | \f | |
6452 | /*********************************************************************** | |
6453 | Blinking cursor | |
6454 | ***********************************************************************/ | |
6455 | ||
c3f13540 | 6456 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 6457 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 6458 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
6459 | WINDOW nil means use the selected window. SHOW non-nil means |
6460 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 | 6461 | don't show a cursor. */) |
5842a27b | 6462 | (Lisp_Object window, Lisp_Object show) |
5f5c8ee5 | 6463 | { |
5f5c8ee5 GM |
6464 | /* Don't change cursor state while redisplaying. This could confuse |
6465 | output routines. */ | |
6466 | if (!redisplaying_p) | |
6467 | { | |
6468 | if (NILP (window)) | |
6469 | window = selected_window; | |
6470 | else | |
b7826503 | 6471 | CHECK_WINDOW (window); |
177c0ea7 | 6472 | |
5d7791b3 | 6473 | XWINDOW (window)->cursor_off_p = NILP (show); |
5f5c8ee5 GM |
6474 | } |
6475 | ||
6476 | return Qnil; | |
4588ec20 | 6477 | } |
5f5c8ee5 GM |
6478 | |
6479 | ||
5d7791b3 GM |
6480 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
6481 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 6482 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 | 6483 | WINDOW nil or omitted means report on the selected window. */) |
5842a27b | 6484 | (Lisp_Object window) |
5d7791b3 GM |
6485 | { |
6486 | struct window *w; | |
177c0ea7 | 6487 | |
5d7791b3 GM |
6488 | if (NILP (window)) |
6489 | window = selected_window; | |
6490 | else | |
b7826503 | 6491 | CHECK_WINDOW (window); |
177c0ea7 | 6492 | |
5d7791b3 | 6493 | w = XWINDOW (window); |
177c0ea7 | 6494 | return w->cursor_off_p ? Qnil : Qt; |
5d7791b3 GM |
6495 | } |
6496 | ||
87478b52 SM |
6497 | DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame, |
6498 | Slast_nonminibuf_frame, 0, 0, 0, | |
6499 | doc: /* Value is last nonminibuffer frame. */) | |
5842a27b | 6500 | (void) |
87478b52 | 6501 | { |
4958ed94 | 6502 | Lisp_Object frame = Qnil; |
87478b52 | 6503 | |
4958ed94 SM |
6504 | if (last_nonminibuf_frame) |
6505 | XSETFRAME (frame, last_nonminibuf_frame); | |
87478b52 SM |
6506 | |
6507 | return frame; | |
6508 | } | |
4588ec20 | 6509 | \f |
5f5c8ee5 GM |
6510 | /*********************************************************************** |
6511 | Initialization | |
6512 | ***********************************************************************/ | |
6513 | ||
dfcf069d | 6514 | void |
971de7fb | 6515 | syms_of_display (void) |
4588ec20 | 6516 | { |
502b9b64 | 6517 | defsubr (&Sredraw_frame); |
4588ec20 | 6518 | defsubr (&Sredraw_display); |
078b3696 | 6519 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
6520 | defsubr (&Sopen_termscript); |
6521 | defsubr (&Sding); | |
7ba07a1a | 6522 | defsubr (&Sredisplay); |
4588ec20 JB |
6523 | defsubr (&Ssleep_for); |
6524 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 6525 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 6526 | defsubr (&Sinternal_show_cursor_p); |
87478b52 | 6527 | defsubr (&Slast_nonminibuf_frame); |
4588ec20 | 6528 | |
2d5912c1 | 6529 | #if GLYPH_DEBUG |
9b0e97aa GM |
6530 | defsubr (&Sdump_redisplay_history); |
6531 | #endif | |
6532 | ||
d1dad759 | 6533 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
6534 | staticpro (&frame_and_buffer_state); |
6535 | ||
d67b4f80 | 6536 | Qdisplay_table = intern_c_string ("display-table"); |
9cda4f7c | 6537 | staticpro (&Qdisplay_table); |
d67b4f80 | 6538 | Qredisplay_dont_pause = intern_c_string ("redisplay-dont-pause"); |
e7067d00 | 6539 | staticpro (&Qredisplay_dont_pause); |
9cda4f7c | 6540 | |
7ee72033 | 6541 | DEFVAR_INT ("baud-rate", &baud_rate, |
bacf09b4 | 6542 | doc: /* *The output baud rate of the terminal. |
228299fa GM |
6543 | On most systems, changing this value will affect the amount of padding |
6544 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 6545 | |
7ee72033 | 6546 | DEFVAR_BOOL ("inverse-video", &inverse_video, |
bacf09b4 | 6547 | doc: /* *Non-nil means invert the entire frame display. |
228299fa | 6548 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 6549 | |
7ee72033 | 6550 | DEFVAR_BOOL ("visible-bell", &visible_bell, |
bacf09b4 | 6551 | doc: /* *Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
6552 | |
6553 | See also `ring-bell-function'. */); | |
177c0ea7 | 6554 | |
7ee72033 | 6555 | DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter, |
bacf09b4 | 6556 | doc: /* *Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
6557 | A non-nil value is useful if the terminal can automatically preserve |
6558 | Emacs's frame display when you reenter Emacs. | |
6559 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 6560 | |
2246281f KL |
6561 | DEFVAR_LISP ("initial-window-system", &Vinitial_window_system, |
6562 | doc: /* Name of the window system that Emacs uses for the first frame. | |
85565e9e RS |
6563 | The value is a symbol--for instance, `x' for X windows. |
6564 | The value is nil if Emacs is using a text-only terminal. */); | |
177c0ea7 | 6565 | |
70b8d0a4 SM |
6566 | DEFVAR_KBOARD ("window-system", Vwindow_system, |
6567 | doc: /* Name of window system through which the selected frame is displayed. | |
6568 | The value is a symbol--for instance, `x' for X windows. | |
6569 | The value is nil if the selected frame is on a text-only-terminal. */); | |
6570 | ||
7ee72033 | 6571 | DEFVAR_LISP ("window-system-version", &Vwindow_system_version, |
bacf09b4 | 6572 | doc: /* The version number of the window system in use. |
c22140f6 | 6573 | For X windows, this is 11. */); |
177c0ea7 | 6574 | |
7ee72033 | 6575 | DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area, |
bacf09b4 | 6576 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 6577 | |
7ee72033 | 6578 | DEFVAR_LISP ("glyph-table", &Vglyph_table, |
bacf09b4 | 6579 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
6580 | If not nil, this is a vector indexed by glyph code to define the glyph. |
6581 | Each element can be: | |
6582 | integer: a glyph code which this glyph is an alias for. | |
6583 | string: output this glyph using that string (not impl. in X windows). | |
6584 | nil: this glyph mod 524288 is the code of a character to output, | |
6585 | and this glyph / 524288 is the face number (see `face-id') to use | |
6586 | while outputting it. */); | |
4588ec20 JB |
6587 | Vglyph_table = Qnil; |
6588 | ||
7ee72033 | 6589 | DEFVAR_LISP ("standard-display-table", &Vstandard_display_table, |
bacf09b4 | 6590 | doc: /* Display table to use for buffers that specify none. |
228299fa | 6591 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
6592 | Vstandard_display_table = Qnil; |
6593 | ||
7ee72033 | 6594 | DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause, |
bacf09b4 | 6595 | doc: /* *Non-nil means update isn't paused when input is detected. */); |
5f5c8ee5 GM |
6596 | redisplay_dont_pause = 0; |
6597 | ||
d012c62b KS |
6598 | #if PERIODIC_PREEMPTION_CHECKING |
6599 | DEFVAR_LISP ("redisplay-preemption-period", &Vredisplay_preemption_period, | |
6600 | doc: /* *The period in seconds between checking for input during redisplay. | |
6601 | If input is detected, redisplay is pre-empted, and the input is processed. | |
6602 | If nil, never pre-empt redisplay. */); | |
6603 | Vredisplay_preemption_period = make_float (0.10); | |
6604 | #endif | |
6605 | ||
4588ec20 JB |
6606 | #ifdef CANNOT_DUMP |
6607 | if (noninteractive) | |
6608 | #endif | |
6609 | { | |
2246281f | 6610 | Vinitial_window_system = Qnil; |
4588ec20 JB |
6611 | Vwindow_system_version = Qnil; |
6612 | } | |
6613 | } | |
6b61353c KH |
6614 | |
6615 | /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413 | |
6616 | (do not change this comment) */ |