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, | |
76b6f707 | 4 | 2004, 2005, 2006, 2007, 2008, 2009 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 JB |
24 | #include <ctype.h> |
25 | ||
dfcf069d AS |
26 | #ifdef HAVE_UNISTD_H |
27 | #include <unistd.h> | |
28 | #endif | |
29 | ||
47099d6f | 30 | #include "lisp.h" |
4588ec20 JB |
31 | #include "termchar.h" |
32 | #include "termopts.h" | |
a0879520 | 33 | /* cm.h must come after dispextern.h on Windows. */ |
fd2e066a GV |
34 | #include "dispextern.h" |
35 | #include "cm.h" | |
4588ec20 | 36 | #include "buffer.h" |
83be827a | 37 | #include "character.h" |
d43721a2 | 38 | #include "keyboard.h" |
502b9b64 | 39 | #include "frame.h" |
428a555e | 40 | #include "termhooks.h" |
4588ec20 JB |
41 | #include "window.h" |
42 | #include "commands.h" | |
43 | #include "disptab.h" | |
44 | #include "indent.h" | |
d169fe39 | 45 | #include "intervals.h" |
97cf50e7 | 46 | #include "blockinput.h" |
dfcf069d | 47 | #include "process.h" |
4588ec20 | 48 | |
24e86043 KH |
49 | /* I don't know why DEC Alpha OSF1 fail to compile this file if we |
50 | include the following file. */ | |
51 | /* #include "systty.h" */ | |
58b2bb63 | 52 | #include "syssignal.h" |
a41f8bed | 53 | |
4588ec20 JB |
54 | #ifdef HAVE_X_WINDOWS |
55 | #include "xterm.h" | |
5f5c8ee5 | 56 | #endif /* HAVE_X_WINDOWS */ |
4588ec20 | 57 | |
fd2e066a GV |
58 | #ifdef HAVE_NTGUI |
59 | #include "w32term.h" | |
60 | #endif /* HAVE_NTGUI */ | |
61 | ||
edfda783 AR |
62 | #ifdef HAVE_NS |
63 | #include "nsterm.h" | |
64 | #endif | |
65 | ||
5f5c8ee5 | 66 | /* Include systime.h after xterm.h to avoid double inclusion of time.h. */ |
6cbd1643 | 67 | |
5f5c8ee5 | 68 | #include "systime.h" |
3883a901 RS |
69 | #include <errno.h> |
70 | ||
5f5c8ee5 GM |
71 | /* To get the prototype for `sleep'. */ |
72 | ||
73 | #ifdef HAVE_UNISTD_H | |
74 | #include <unistd.h> | |
75 | #endif | |
76 | ||
4588ec20 | 77 | /* Get number of chars of output now in the buffer of a stdio stream. |
5f5c8ee5 GM |
78 | This ought to be built in in stdio, but it isn't. Some s- files |
79 | override this because their stdio internals differ. */ | |
80 | ||
e3271ae5 | 81 | #ifdef __GNU_LIBRARY__ |
5f5c8ee5 GM |
82 | |
83 | /* The s- file might have overridden the definition with one that | |
84 | works for the system's C library. But we are using the GNU C | |
85 | library, so this is the right definition for every system. */ | |
86 | ||
3883a901 RS |
87 | #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT |
88 | #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT | |
89 | #else | |
cb5558ff | 90 | #undef PENDING_OUTPUT_COUNT |
e3271ae5 | 91 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer) |
3883a901 RS |
92 | #endif |
93 | #else /* not __GNU_LIBRARY__ */ | |
68c45bf0 PE |
94 | #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING |
95 | #include <stdio_ext.h> | |
96 | #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE) | |
97 | #endif | |
cb5558ff | 98 | #ifndef PENDING_OUTPUT_COUNT |
4588ec20 JB |
99 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) |
100 | #endif | |
5f5c8ee5 GM |
101 | #endif /* not __GNU_LIBRARY__ */ |
102 | ||
8a2a6032 | 103 | #if defined(HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES) |
fa0ec9f4 DL |
104 | #include <term.h> /* for tgetent */ |
105 | #endif | |
5f5c8ee5 GM |
106 | \f |
107 | /* Structure to pass dimensions around. Used for character bounding | |
108 | boxes, glyph matrix dimensions and alike. */ | |
109 | ||
110 | struct dim | |
111 | { | |
112 | int width; | |
113 | int height; | |
114 | }; | |
115 | ||
116 | \f | |
117 | /* Function prototypes. */ | |
118 | ||
bccee4f2 GM |
119 | static struct glyph_matrix *save_current_matrix P_ ((struct frame *)); |
120 | static void restore_current_matrix P_ ((struct frame *, struct glyph_matrix *)); | |
075757cc | 121 | static int showing_window_margins_p P_ ((struct window *)); |
c9f00270 | 122 | static void fake_current_matrices P_ ((Lisp_Object)); |
408f5064 GM |
123 | static void redraw_overlapping_rows P_ ((struct window *, int)); |
124 | static void redraw_overlapped_rows P_ ((struct window *, int)); | |
5f5c8ee5 GM |
125 | static int count_blanks P_ ((struct glyph *, int)); |
126 | static int count_match P_ ((struct glyph *, struct glyph *, | |
127 | struct glyph *, struct glyph *)); | |
128 | static unsigned line_draw_cost P_ ((struct glyph_matrix *, int)); | |
129 | static void update_frame_line P_ ((struct frame *, int)); | |
130 | static struct dim allocate_matrices_for_frame_redisplay | |
5d3cc43c GM |
131 | P_ ((Lisp_Object, int, int, int, int *)); |
132 | static void allocate_matrices_for_window_redisplay P_ ((struct window *)); | |
5f5c8ee5 GM |
133 | static int realloc_glyph_pool P_ ((struct glyph_pool *, struct dim)); |
134 | static void adjust_frame_glyphs P_ ((struct frame *)); | |
135 | struct glyph_matrix *new_glyph_matrix P_ ((struct glyph_pool *)); | |
136 | static void free_glyph_matrix P_ ((struct glyph_matrix *)); | |
137 | static void adjust_glyph_matrix P_ ((struct window *, struct glyph_matrix *, | |
138 | int, int, struct dim)); | |
b96fd3e8 | 139 | static void change_frame_size_1 P_ ((struct frame *, int, int, int, int, int)); |
5f5c8ee5 | 140 | static void swap_glyph_pointers P_ ((struct glyph_row *, struct glyph_row *)); |
f1d2ce7f | 141 | #if GLYPH_DEBUG |
5f5c8ee5 | 142 | static int glyph_row_slice_p P_ ((struct glyph_row *, struct glyph_row *)); |
9339e87f | 143 | #endif |
5f5c8ee5 GM |
144 | static void fill_up_frame_row_with_spaces P_ ((struct glyph_row *, int)); |
145 | static void build_frame_matrix_from_window_tree P_ ((struct glyph_matrix *, | |
146 | struct window *)); | |
147 | static void build_frame_matrix_from_leaf_window P_ ((struct glyph_matrix *, | |
148 | struct window *)); | |
149 | static struct glyph_pool *new_glyph_pool P_ ((void)); | |
150 | static void free_glyph_pool P_ ((struct glyph_pool *)); | |
151 | static void adjust_frame_glyphs_initially P_ ((void)); | |
152 | static void adjust_frame_message_buffer P_ ((struct frame *)); | |
153 | static void adjust_decode_mode_spec_buffer P_ ((struct frame *)); | |
154 | static void fill_up_glyph_row_with_spaces P_ ((struct glyph_row *)); | |
155 | static void build_frame_matrix P_ ((struct frame *)); | |
156 | void clear_current_matrices P_ ((struct frame *)); | |
157 | void scroll_glyph_matrix_range P_ ((struct glyph_matrix *, int, int, | |
158 | int, int)); | |
159 | static void clear_window_matrices P_ ((struct window *, int)); | |
160 | static void fill_up_glyph_row_area_with_spaces P_ ((struct glyph_row *, int)); | |
161 | static int scrolling_window P_ ((struct window *, int)); | |
e876ff42 | 162 | static int update_window_line P_ ((struct window *, int, int *)); |
5f5c8ee5 | 163 | static void update_marginal_area P_ ((struct window *, int, int)); |
408f5064 | 164 | static int update_text_area P_ ((struct window *, int)); |
5f5c8ee5 GM |
165 | static void make_current P_ ((struct glyph_matrix *, struct glyph_matrix *, |
166 | int)); | |
167 | static void mirror_make_current P_ ((struct window *, int)); | |
168 | void check_window_matrix_pointers P_ ((struct window *)); | |
b96fd3e8 | 169 | #if GLYPH_DEBUG |
5f5c8ee5 GM |
170 | static void check_matrix_pointers P_ ((struct glyph_matrix *, |
171 | struct glyph_matrix *)); | |
b96fd3e8 | 172 | #endif |
5f5c8ee5 GM |
173 | static void mirror_line_dance P_ ((struct window *, int, int, int *, char *)); |
174 | static int update_window_tree P_ ((struct window *, int)); | |
175 | static int update_window P_ ((struct window *, int)); | |
176 | static int update_frame_1 P_ ((struct frame *, int, int)); | |
177 | static void set_window_cursor_after_update P_ ((struct window *)); | |
178 | static int row_equal_p P_ ((struct window *, struct glyph_row *, | |
e4e0bee9 | 179 | struct glyph_row *, int)); |
5f5c8ee5 GM |
180 | static void adjust_frame_glyphs_for_window_redisplay P_ ((struct frame *)); |
181 | static void adjust_frame_glyphs_for_frame_redisplay P_ ((struct frame *)); | |
182 | static void reverse_rows P_ ((struct glyph_matrix *, int, int)); | |
183 | static int margin_glyphs_to_reserve P_ ((struct window *, int, Lisp_Object)); | |
a13396c9 GM |
184 | static void sync_window_with_frame_matrix_rows P_ ((struct window *)); |
185 | struct window *frame_row_to_window P_ ((struct window *, int)); | |
5f5c8ee5 | 186 | |
5f5c8ee5 GM |
187 | \f |
188 | /* Non-zero means don't pause redisplay for pending input. (This is | |
189 | for debugging and for a future implementation of EDT-like | |
190 | scrolling. */ | |
4588ec20 | 191 | |
5f5c8ee5 | 192 | int redisplay_dont_pause; |
45140e01 | 193 | |
d012c62b KS |
194 | /* Define PERIODIC_PREEMPTION_CHECKING to 1, if micro-second timers |
195 | are supported, so we can check for input during redisplay at | |
196 | regular intervals. */ | |
197 | #ifdef EMACS_HAS_USECS | |
198 | #define PERIODIC_PREEMPTION_CHECKING 1 | |
199 | #else | |
200 | #define PERIODIC_PREEMPTION_CHECKING 0 | |
201 | #endif | |
202 | ||
203 | #if PERIODIC_PREEMPTION_CHECKING | |
204 | ||
205 | /* If a number (float), check for user input every N seconds. */ | |
206 | ||
207 | Lisp_Object Vredisplay_preemption_period; | |
208 | ||
209 | /* Redisplay preemption timers. */ | |
210 | ||
211 | static EMACS_TIME preemption_period; | |
212 | static EMACS_TIME preemption_next_check; | |
213 | ||
214 | #endif | |
215 | ||
a41f8bed | 216 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 217 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 218 | |
502b9b64 | 219 | int frame_garbaged; |
4588ec20 | 220 | |
5f5c8ee5 | 221 | /* Nonzero means last display completed. Zero means it was preempted. */ |
4588ec20 JB |
222 | |
223 | int display_completed; | |
224 | ||
5f5c8ee5 GM |
225 | /* Lisp variable visible-bell; enables use of screen-flash instead of |
226 | audible bell. */ | |
4588ec20 JB |
227 | |
228 | int visible_bell; | |
229 | ||
502b9b64 | 230 | /* Invert the color of the whole frame, at a low level. */ |
4588ec20 JB |
231 | |
232 | int inverse_video; | |
233 | ||
234 | /* Line speed of the terminal. */ | |
235 | ||
31ade731 | 236 | EMACS_INT baud_rate; |
4588ec20 | 237 | |
5f5c8ee5 | 238 | /* Either nil or a symbol naming the window system under which Emacs |
2246281f | 239 | creates the first frame. */ |
4588ec20 | 240 | |
2246281f | 241 | Lisp_Object Vinitial_window_system; |
4588ec20 JB |
242 | |
243 | /* Version number of X windows: 10, 11 or nil. */ | |
5f5c8ee5 | 244 | |
4588ec20 JB |
245 | Lisp_Object Vwindow_system_version; |
246 | ||
5f5c8ee5 GM |
247 | /* Vector of glyph definitions. Indexed by glyph number, the contents |
248 | are a string which is how to output the glyph. | |
4588ec20 JB |
249 | |
250 | If Vglyph_table is nil, a glyph is output by using its low 8 bits | |
5f5c8ee5 GM |
251 | as a character code. |
252 | ||
253 | This is an obsolete feature that is no longer used. The variable | |
254 | is retained for compatibility. */ | |
4588ec20 JB |
255 | |
256 | Lisp_Object Vglyph_table; | |
257 | ||
258 | /* Display table to use for vectors that don't specify their own. */ | |
259 | ||
260 | Lisp_Object Vstandard_display_table; | |
261 | ||
5f5c8ee5 | 262 | /* Nonzero means reading single-character input with prompt so put |
153a073c | 263 | cursor on mini-buffer after the prompt. Positive means at end of |
5f5c8ee5 GM |
264 | text in echo area; negative means at beginning of line. */ |
265 | ||
4588ec20 | 266 | int cursor_in_echo_area; |
9cda4f7c | 267 | |
e7067d00 | 268 | Lisp_Object Qdisplay_table, Qredisplay_dont_pause; |
5f5c8ee5 | 269 | |
4588ec20 | 270 | \f |
5f5c8ee5 | 271 | /* The currently selected frame. In a single-frame version, this |
91fb7e1b | 272 | variable always equals the_only_frame. */ |
4588ec20 | 273 | |
91fb7e1b | 274 | Lisp_Object selected_frame; |
4588ec20 | 275 | |
5f5c8ee5 | 276 | /* A frame which is not just a mini-buffer, or 0 if there are no such |
502b9b64 | 277 | frames. This is usually the most recent such frame that was |
87485d6f MW |
278 | selected. In a single-frame version, this variable always holds |
279 | the address of the_only_frame. */ | |
4588ec20 | 280 | |
5f5c8ee5 | 281 | struct frame *last_nonminibuf_frame; |
d52bad65 | 282 | |
5f5c8ee5 | 283 | /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 284 | |
5f5c8ee5 | 285 | int delayed_size_change; |
4588ec20 | 286 | |
5f5c8ee5 | 287 | /* 1 means glyph initialization has been completed at startup. */ |
4588ec20 | 288 | |
5f5c8ee5 | 289 | static int glyphs_initialized_initially_p; |
4588ec20 | 290 | |
5f5c8ee5 | 291 | /* Updated window if != 0. Set by update_window. */ |
4588ec20 | 292 | |
5f5c8ee5 | 293 | struct window *updated_window; |
4588ec20 | 294 | |
5f5c8ee5 | 295 | /* Glyph row updated in update_window_line, and area that is updated. */ |
4588ec20 | 296 | |
5f5c8ee5 GM |
297 | struct glyph_row *updated_row; |
298 | int updated_area; | |
4588ec20 | 299 | |
5f5c8ee5 | 300 | /* A glyph for a space. */ |
4588ec20 | 301 | |
5f5c8ee5 | 302 | struct glyph space_glyph; |
4588ec20 | 303 | |
5f5c8ee5 GM |
304 | /* Non-zero means update has been performed directly, so that there's |
305 | no need for redisplay_internal to do much work. Set by | |
306 | direct_output_for_insert. */ | |
4588ec20 | 307 | |
5f5c8ee5 | 308 | int redisplay_performed_directly_p; |
4588ec20 | 309 | |
5f5c8ee5 GM |
310 | /* Counts of allocated structures. These counts serve to diagnose |
311 | memory leaks and double frees. */ | |
4588ec20 | 312 | |
5f5c8ee5 GM |
313 | int glyph_matrix_count; |
314 | int glyph_pool_count; | |
4588ec20 | 315 | |
5f5c8ee5 GM |
316 | /* If non-null, the frame whose frame matrices are manipulated. If |
317 | null, window matrices are worked on. */ | |
4588ec20 | 318 | |
5f5c8ee5 | 319 | static struct frame *frame_matrix_frame; |
4588ec20 | 320 | |
5f5c8ee5 GM |
321 | /* Non-zero means that fonts have been loaded since the last glyph |
322 | matrix adjustments. Redisplay must stop, and glyph matrices must | |
323 | be adjusted when this flag becomes non-zero during display. The | |
324 | reason fonts can be loaded so late is that fonts of fontsets are | |
3aa9f0c4 KH |
325 | loaded on demand. Another reason is that a line contains many |
326 | characters displayed by zero width or very narrow glyphs of | |
327 | variable-width fonts. */ | |
836d2cde | 328 | |
5f5c8ee5 | 329 | int fonts_changed_p; |
836d2cde | 330 | |
177c0ea7 | 331 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 332 | This may only be used for terminal frames. */ |
836d2cde | 333 | |
5f5c8ee5 | 334 | #if GLYPH_DEBUG |
4588ec20 | 335 | |
5f5c8ee5 GM |
336 | static int window_to_frame_vpos P_ ((struct window *, int)); |
337 | static int window_to_frame_hpos P_ ((struct window *, int)); | |
338 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) | |
339 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 340 | |
9b0e97aa GM |
341 | /* One element of the ring buffer containing redisplay history |
342 | information. */ | |
343 | ||
344 | struct redisplay_history | |
345 | { | |
346 | char trace[512 + 100]; | |
347 | }; | |
348 | ||
349 | /* The size of the history buffer. */ | |
350 | ||
351 | #define REDISPLAY_HISTORY_SIZE 30 | |
352 | ||
353 | /* The redisplay history buffer. */ | |
354 | ||
355 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
356 | ||
357 | /* Next free entry in redisplay_history. */ | |
358 | ||
359 | static int history_idx; | |
360 | ||
361 | /* A tick that's incremented each time something is added to the | |
362 | history. */ | |
363 | ||
364 | static unsigned history_tick; | |
365 | ||
366 | static void add_frame_display_history P_ ((struct frame *, int)); | |
367 | static void add_window_display_history P_ ((struct window *, char *, int)); | |
6a8aec41 | 368 | \f |
9b0e97aa GM |
369 | /* Add to the redisplay history how window W has been displayed. |
370 | MSG is a trace containing the information how W's glyph matrix | |
153a073c | 371 | has been constructed. PAUSED_P non-zero means that the update |
9b0e97aa GM |
372 | has been interrupted for pending input. */ |
373 | ||
374 | static void | |
375 | add_window_display_history (w, msg, paused_p) | |
376 | struct window *w; | |
377 | char *msg; | |
378 | int paused_p; | |
379 | { | |
380 | char *buf; | |
177c0ea7 | 381 | |
9b0e97aa GM |
382 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
383 | history_idx = 0; | |
384 | buf = redisplay_history[history_idx].trace; | |
385 | ++history_idx; | |
177c0ea7 | 386 | |
9b0e97aa GM |
387 | sprintf (buf, "%d: window %p (`%s')%s\n", |
388 | history_tick++, | |
389 | w, | |
390 | ((BUFFERP (w->buffer) | |
391 | && STRINGP (XBUFFER (w->buffer)->name)) | |
d5db4077 | 392 | ? (char *) SDATA (XBUFFER (w->buffer)->name) |
9b0e97aa GM |
393 | : "???"), |
394 | paused_p ? " ***paused***" : ""); | |
395 | strcat (buf, msg); | |
396 | } | |
397 | ||
398 | ||
399 | /* Add to the redisplay history that frame F has been displayed. | |
400 | PAUSED_P non-zero means that the update has been interrupted for | |
401 | pending input. */ | |
402 | ||
403 | static void | |
404 | add_frame_display_history (f, paused_p) | |
405 | struct frame *f; | |
406 | int paused_p; | |
407 | { | |
408 | char *buf; | |
177c0ea7 | 409 | |
9b0e97aa GM |
410 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
411 | history_idx = 0; | |
412 | buf = redisplay_history[history_idx].trace; | |
413 | ++history_idx; | |
177c0ea7 | 414 | |
9b0e97aa GM |
415 | sprintf (buf, "%d: update frame %p%s", |
416 | history_tick++, | |
417 | f, paused_p ? " ***paused***" : ""); | |
418 | } | |
419 | ||
420 | ||
421 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, | |
422 | Sdump_redisplay_history, 0, 0, "", | |
7ee72033 MB |
423 | doc: /* Dump redisplay history to stderr. */) |
424 | () | |
9b0e97aa GM |
425 | { |
426 | int i; | |
427 | ||
428 | for (i = history_idx - 1; i != history_idx; --i) | |
429 | { | |
430 | if (i < 0) | |
431 | i = REDISPLAY_HISTORY_SIZE - 1; | |
432 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
433 | } | |
434 | ||
435 | return Qnil; | |
436 | } | |
437 | ||
438 | ||
5f5c8ee5 | 439 | #else /* GLYPH_DEBUG == 0 */ |
4588ec20 | 440 | |
7df02016 KS |
441 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
442 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 443 | |
5f5c8ee5 | 444 | #endif /* GLYPH_DEBUG == 0 */ |
4588ec20 | 445 | |
4588ec20 | 446 | |
5f5c8ee5 GM |
447 | /* Like bcopy except never gets confused by overlap. Let this be the |
448 | first function defined in this file, or change emacs.c where the | |
449 | address of this function is used. */ | |
4588ec20 JB |
450 | |
451 | void | |
452 | safe_bcopy (from, to, size) | |
ea64076a KR |
453 | const char *from; |
454 | char *to; | |
4588ec20 JB |
455 | int size; |
456 | { | |
b5c685f4 | 457 | if (size <= 0 || from == to) |
4588ec20 JB |
458 | return; |
459 | ||
b5c685f4 JB |
460 | /* If the source and destination don't overlap, then bcopy can |
461 | handle it. If they do overlap, but the destination is lower in | |
462 | memory than the source, we'll assume bcopy can handle that. */ | |
463 | if (to < from || from + size <= to) | |
464 | bcopy (from, to, size); | |
465 | ||
466 | /* Otherwise, we'll copy from the end. */ | |
467 | else | |
4588ec20 | 468 | { |
ea64076a | 469 | register const char *endf = from + size; |
b5c685f4 | 470 | register char *endt = to + size; |
4588ec20 JB |
471 | |
472 | /* If TO - FROM is large, then we should break the copy into | |
473 | nonoverlapping chunks of TO - FROM bytes each. However, if | |
474 | TO - FROM is small, then the bcopy function call overhead | |
475 | makes this not worth it. The crossover point could be about | |
b5c685f4 JB |
476 | anywhere. Since I don't think the obvious copy loop is too |
477 | bad, I'm trying to err in its favor. */ | |
4588ec20 JB |
478 | if (to - from < 64) |
479 | { | |
480 | do | |
481 | *--endt = *--endf; | |
482 | while (endf != from); | |
483 | } | |
484 | else | |
485 | { | |
b5c685f4 | 486 | for (;;) |
4588ec20 JB |
487 | { |
488 | endt -= (to - from); | |
489 | endf -= (to - from); | |
490 | ||
b5c685f4 JB |
491 | if (endt < to) |
492 | break; | |
493 | ||
4588ec20 JB |
494 | bcopy (endf, endt, to - from); |
495 | } | |
b5c685f4 JB |
496 | |
497 | /* If SIZE wasn't a multiple of TO - FROM, there will be a | |
5f5c8ee5 GM |
498 | little left over. The amount left over is (endt + (to - |
499 | from)) - to, which is endt - from. */ | |
4588ec20 JB |
500 | bcopy (from, to, endt - from); |
501 | } | |
502 | } | |
177c0ea7 | 503 | } |
4588ec20 | 504 | |
4588ec20 | 505 | |
5f5c8ee5 GM |
506 | \f |
507 | /*********************************************************************** | |
508 | Glyph Matrices | |
509 | ***********************************************************************/ | |
510 | ||
511 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
512 | pool from which memory for the matrix should be allocated, or null | |
513 | for window-based redisplay where no glyph pools are used. The | |
514 | member `pool' of the glyph matrix structure returned is set to | |
515 | POOL, the structure is otherwise zeroed. */ | |
516 | ||
517 | struct glyph_matrix * | |
518 | new_glyph_matrix (pool) | |
519 | struct glyph_pool *pool; | |
4588ec20 | 520 | { |
5f5c8ee5 GM |
521 | struct glyph_matrix *result; |
522 | ||
523 | /* Allocate and clear. */ | |
524 | result = (struct glyph_matrix *) xmalloc (sizeof *result); | |
525 | bzero (result, sizeof *result); | |
4588ec20 | 526 | |
5f5c8ee5 GM |
527 | /* Increment number of allocated matrices. This count is used |
528 | to detect memory leaks. */ | |
529 | ++glyph_matrix_count; | |
4588ec20 | 530 | |
5f5c8ee5 GM |
531 | /* Set pool and return. */ |
532 | result->pool = pool; | |
533 | return result; | |
4588ec20 JB |
534 | } |
535 | ||
4588ec20 | 536 | |
5f5c8ee5 GM |
537 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
538 | ||
539 | The global counter glyph_matrix_count is decremented when a matrix | |
540 | is freed. If the count gets negative, more structures were freed | |
541 | than allocated, i.e. one matrix was freed more than once or a bogus | |
542 | pointer was passed to this function. | |
177c0ea7 | 543 | |
5f5c8ee5 GM |
544 | If MATRIX->pool is null, this means that the matrix manages its own |
545 | glyph memory---this is done for matrices on X frames. Freeing the | |
546 | matrix also frees the glyph memory in this case. */ | |
547 | ||
548 | static void | |
549 | free_glyph_matrix (matrix) | |
550 | struct glyph_matrix *matrix; | |
4588ec20 | 551 | { |
5f5c8ee5 GM |
552 | if (matrix) |
553 | { | |
554 | int i; | |
555 | ||
556 | /* Detect the case that more matrices are freed than were | |
557 | allocated. */ | |
558 | if (--glyph_matrix_count < 0) | |
559 | abort (); | |
560 | ||
561 | /* Free glyph memory if MATRIX owns it. */ | |
562 | if (matrix->pool == NULL) | |
563 | for (i = 0; i < matrix->rows_allocated; ++i) | |
564 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 565 | |
5f5c8ee5 GM |
566 | /* Free row structures and the matrix itself. */ |
567 | xfree (matrix->rows); | |
568 | xfree (matrix); | |
569 | } | |
570 | } | |
4588ec20 | 571 | |
4588ec20 | 572 | |
5f5c8ee5 GM |
573 | /* Return the number of glyphs to reserve for a marginal area of |
574 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
575 | display line of window W. MARGIN gives the width of the marginal | |
576 | area in canonical character units. MARGIN should be an integer | |
577 | or a float. */ | |
578 | ||
579 | static int | |
580 | margin_glyphs_to_reserve (w, total_glyphs, margin) | |
581 | struct window *w; | |
582 | int total_glyphs; | |
583 | Lisp_Object margin; | |
584 | { | |
585 | int n; | |
4588ec20 | 586 | |
5f5c8ee5 | 587 | if (NUMBERP (margin)) |
4588ec20 | 588 | { |
7df02016 | 589 | int width = XFASTINT (w->total_cols); |
5f5c8ee5 GM |
590 | double d = max (0, XFLOATINT (margin)); |
591 | d = min (width / 2 - 1, d); | |
35ec832e | 592 | n = (int) ((double) total_glyphs / width * d); |
5f5c8ee5 GM |
593 | } |
594 | else | |
595 | n = 0; | |
596 | ||
597 | return n; | |
598 | } | |
599 | ||
4588ec20 | 600 | |
5f5c8ee5 GM |
601 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
602 | window sizes. | |
4588ec20 | 603 | |
5f5c8ee5 GM |
604 | W is null if the function is called for a frame glyph matrix. |
605 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
606 | indices of the first column and row of MATRIX within the frame | |
607 | matrix, if such a matrix exists. They are zero for purely | |
608 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 609 | |
5f5c8ee5 GM |
610 | In window-based redisplay, where no frame matrices exist, glyph |
611 | matrices manage their own glyph storage. Otherwise, they allocate | |
612 | storage from a common frame glyph pool which can be found in | |
613 | MATRIX->pool. | |
23b0200c | 614 | |
5f5c8ee5 GM |
615 | The reason for this memory management strategy is to avoid complete |
616 | frame redraws if possible. When we allocate from a common pool, a | |
617 | change of the location or size of a sub-matrix within the pool | |
618 | requires a complete redisplay of the frame because we cannot easily | |
619 | make sure that the current matrices of all windows still agree with | |
620 | what is displayed on the screen. While this is usually fast, it | |
621 | leads to screen flickering. */ | |
23b0200c | 622 | |
5f5c8ee5 GM |
623 | static void |
624 | adjust_glyph_matrix (w, matrix, x, y, dim) | |
625 | struct window *w; | |
626 | struct glyph_matrix *matrix; | |
627 | int x, y; | |
628 | struct dim dim; | |
629 | { | |
630 | int i; | |
631 | int new_rows; | |
632 | int marginal_areas_changed_p = 0; | |
045dee35 GM |
633 | int header_line_changed_p = 0; |
634 | int header_line_p = 0; | |
5f5c8ee5 | 635 | int left = -1, right = -1; |
ca8a12a7 | 636 | int window_width = -1, window_height = -1; |
5f5c8ee5 | 637 | |
6b61353c KH |
638 | /* See if W had a header line that has disappeared now, or vice versa. |
639 | Get W's size. */ | |
5f5c8ee5 GM |
640 | if (w) |
641 | { | |
6b61353c KH |
642 | window_box (w, -1, 0, 0, &window_width, &window_height); |
643 | ||
045dee35 GM |
644 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
645 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 646 | } |
045dee35 | 647 | matrix->header_line_p = header_line_p; |
23b0200c | 648 | |
6b61353c KH |
649 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
650 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
651 | haven't changed. This optimization is important because preserving |
652 | the matrix means preventing redisplay. */ | |
653 | if (matrix->pool == NULL) | |
654 | { | |
7df02016 KS |
655 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
656 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
5f5c8ee5 GM |
657 | xassert (left >= 0 && right >= 0); |
658 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs | |
659 | || right != matrix->right_margin_glyphs); | |
660 | ||
661 | if (!marginal_areas_changed_p | |
662 | && !fonts_changed_p | |
045dee35 | 663 | && !header_line_changed_p |
7df02016 KS |
664 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
665 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
666 | && matrix->window_height == window_height |
667 | && matrix->window_vscroll == w->vscroll | |
668 | && matrix->window_width == window_width) | |
669 | return; | |
670 | } | |
177c0ea7 | 671 | |
5f5c8ee5 GM |
672 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
673 | if (matrix->rows_allocated < dim.height) | |
674 | { | |
675 | int size = dim.height * sizeof (struct glyph_row); | |
676 | new_rows = dim.height - matrix->rows_allocated; | |
677 | matrix->rows = (struct glyph_row *) xrealloc (matrix->rows, size); | |
678 | bzero (matrix->rows + matrix->rows_allocated, | |
679 | new_rows * sizeof *matrix->rows); | |
680 | matrix->rows_allocated = dim.height; | |
681 | } | |
682 | else | |
683 | new_rows = 0; | |
60a8948a | 684 | |
5f5c8ee5 GM |
685 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
686 | on a frame not using window-based redisplay. Set up pointers for | |
687 | each row into the glyph pool. */ | |
688 | if (matrix->pool) | |
689 | { | |
690 | xassert (matrix->pool->glyphs); | |
177c0ea7 | 691 | |
5f5c8ee5 | 692 | if (w) |
60a8948a | 693 | { |
5f5c8ee5 | 694 | left = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 695 | w->left_margin_cols); |
5f5c8ee5 | 696 | right = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 697 | w->right_margin_cols); |
60a8948a | 698 | } |
5f5c8ee5 GM |
699 | else |
700 | left = right = 0; | |
177c0ea7 | 701 | |
5f5c8ee5 | 702 | for (i = 0; i < dim.height; ++i) |
60a8948a | 703 | { |
5f5c8ee5 | 704 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
705 | |
706 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
707 | = (matrix->pool->glyphs |
708 | + (y + i) * matrix->pool->ncolumns | |
709 | + x); | |
177c0ea7 | 710 | |
5f5c8ee5 GM |
711 | if (w == NULL |
712 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 713 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
714 | { |
715 | row->glyphs[TEXT_AREA] | |
716 | = row->glyphs[LEFT_MARGIN_AREA]; | |
717 | row->glyphs[RIGHT_MARGIN_AREA] | |
718 | = row->glyphs[TEXT_AREA] + dim.width; | |
719 | row->glyphs[LAST_AREA] | |
720 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
721 | } | |
722 | else | |
723 | { | |
724 | row->glyphs[TEXT_AREA] | |
725 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
726 | row->glyphs[RIGHT_MARGIN_AREA] | |
727 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
728 | row->glyphs[LAST_AREA] | |
729 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
730 | } | |
60a8948a | 731 | } |
177c0ea7 | 732 | |
5f5c8ee5 GM |
733 | matrix->left_margin_glyphs = left; |
734 | matrix->right_margin_glyphs = right; | |
735 | } | |
736 | else | |
737 | { | |
738 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
6b61353c KH |
739 | its own memory. It is a window matrix for window-based redisplay. |
740 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
741 | if (dim.width > matrix->matrix_w |
742 | || new_rows | |
045dee35 | 743 | || header_line_changed_p |
5f5c8ee5 | 744 | || marginal_areas_changed_p) |
4588ec20 | 745 | { |
5f5c8ee5 GM |
746 | struct glyph_row *row = matrix->rows; |
747 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 748 | |
5f5c8ee5 GM |
749 | while (row < end) |
750 | { | |
751 | row->glyphs[LEFT_MARGIN_AREA] | |
752 | = (struct glyph *) xrealloc (row->glyphs[LEFT_MARGIN_AREA], | |
753 | (dim.width | |
754 | * sizeof (struct glyph))); | |
177c0ea7 | 755 | |
5f5c8ee5 GM |
756 | /* The mode line never has marginal areas. */ |
757 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 758 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
759 | { |
760 | row->glyphs[TEXT_AREA] | |
761 | = row->glyphs[LEFT_MARGIN_AREA]; | |
762 | row->glyphs[RIGHT_MARGIN_AREA] | |
763 | = row->glyphs[TEXT_AREA] + dim.width; | |
764 | row->glyphs[LAST_AREA] | |
765 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
766 | } | |
767 | else | |
768 | { | |
769 | row->glyphs[TEXT_AREA] | |
770 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
771 | row->glyphs[RIGHT_MARGIN_AREA] | |
772 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
773 | row->glyphs[LAST_AREA] | |
774 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
775 | } | |
776 | ++row; | |
777 | } | |
4588ec20 JB |
778 | } |
779 | ||
5f5c8ee5 GM |
780 | xassert (left >= 0 && right >= 0); |
781 | matrix->left_margin_glyphs = left; | |
782 | matrix->right_margin_glyphs = right; | |
783 | } | |
177c0ea7 | 784 | |
5f5c8ee5 GM |
785 | /* Number of rows to be used by MATRIX. */ |
786 | matrix->nrows = dim.height; | |
3ed36514 | 787 | xassert (matrix->nrows >= 0); |
5f5c8ee5 | 788 | |
b7b20fbd | 789 | if (w) |
5f5c8ee5 | 790 | { |
b7b20fbd | 791 | if (matrix == w->current_matrix) |
4588ec20 | 792 | { |
b7b20fbd GM |
793 | /* Mark rows in a current matrix of a window as not having |
794 | valid contents. It's important to not do this for | |
795 | desired matrices. When Emacs starts, it may already be | |
796 | building desired matrices when this function runs. */ | |
797 | if (window_width < 0) | |
798 | window_width = window_box_width (w, -1); | |
177c0ea7 | 799 | |
b7b20fbd GM |
800 | /* Optimize the case that only the height has changed (C-x 2, |
801 | upper window). Invalidate all rows that are no longer part | |
802 | of the window. */ | |
803 | if (!marginal_areas_changed_p | |
73d75a62 GM |
804 | && !header_line_changed_p |
805 | && new_rows == 0 | |
806 | && dim.width == matrix->matrix_w | |
7df02016 KS |
807 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
808 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 809 | && matrix->window_width == window_width) |
b7b20fbd | 810 | { |
dd42b31a GM |
811 | /* Find the last row in the window. */ |
812 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
813 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
814 | { | |
26447967 | 815 | ++i; |
dd42b31a GM |
816 | break; |
817 | } | |
b7b20fbd GM |
818 | |
819 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 820 | are invalidated below. */ |
b7b20fbd GM |
821 | if (INTEGERP (w->window_end_vpos) |
822 | && XFASTINT (w->window_end_vpos) >= i) | |
823 | w->window_end_valid = Qnil; | |
177c0ea7 | 824 | |
b7b20fbd GM |
825 | while (i < matrix->nrows) |
826 | matrix->rows[i++].enabled_p = 0; | |
827 | } | |
828 | else | |
829 | { | |
830 | for (i = 0; i < matrix->nrows; ++i) | |
831 | matrix->rows[i].enabled_p = 0; | |
832 | } | |
5f5c8ee5 | 833 | } |
b7b20fbd | 834 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 835 | { |
b7b20fbd GM |
836 | /* Rows in desired matrices always have to be cleared; |
837 | redisplay expects this is the case when it runs, so it | |
838 | had better be the case when we adjust matrices between | |
839 | redisplays. */ | |
5f5c8ee5 GM |
840 | for (i = 0; i < matrix->nrows; ++i) |
841 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 842 | } |
4588ec20 | 843 | } |
177c0ea7 JB |
844 | |
845 | ||
5f5c8ee5 GM |
846 | /* Remember last values to be able to optimize frame redraws. */ |
847 | matrix->matrix_x = x; | |
848 | matrix->matrix_y = y; | |
849 | matrix->matrix_w = dim.width; | |
850 | matrix->matrix_h = dim.height; | |
851 | ||
852 | /* Record the top y location and height of W at the time the matrix | |
853 | was last adjusted. This is used to optimize redisplay above. */ | |
854 | if (w) | |
4588ec20 | 855 | { |
7df02016 KS |
856 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
857 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
858 | matrix->window_height = window_height; |
859 | matrix->window_width = window_width; | |
860 | matrix->window_vscroll = w->vscroll; | |
861 | } | |
862 | } | |
4588ec20 | 863 | |
4588ec20 | 864 | |
5f5c8ee5 GM |
865 | /* Reverse the contents of rows in MATRIX between START and END. The |
866 | contents of the row at END - 1 end up at START, END - 2 at START + | |
867 | 1 etc. This is part of the implementation of rotate_matrix (see | |
868 | below). */ | |
d52bad65 | 869 | |
5f5c8ee5 GM |
870 | static void |
871 | reverse_rows (matrix, start, end) | |
872 | struct glyph_matrix *matrix; | |
873 | int start, end; | |
874 | { | |
875 | int i, j; | |
23b0200c | 876 | |
5f5c8ee5 GM |
877 | for (i = start, j = end - 1; i < j; ++i, --j) |
878 | { | |
879 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
880 | initialization. */ | |
881 | struct glyph_row temp; | |
882 | temp = matrix->rows[i]; | |
883 | matrix->rows[i] = matrix->rows[j]; | |
884 | matrix->rows[j] = temp; | |
885 | } | |
886 | } | |
23b0200c | 887 | |
23b0200c | 888 | |
5f5c8ee5 GM |
889 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
890 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
891 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
892 | row structures are moved around). | |
60a8948a | 893 | |
5f5c8ee5 GM |
894 | The algorithm used for rotating the vector was, I believe, first |
895 | described by Kernighan. See the vector R as consisting of two | |
896 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
897 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
898 | and reverse the result to get (ArBr)r which is BA. Similar for | |
899 | rotating right. */ | |
900 | ||
901 | void | |
902 | rotate_matrix (matrix, first, last, by) | |
903 | struct glyph_matrix *matrix; | |
904 | int first, last, by; | |
905 | { | |
906 | if (by < 0) | |
907 | { | |
908 | /* Up (rotate left, i.e. towards lower indices). */ | |
909 | by = -by; | |
910 | reverse_rows (matrix, first, first + by); | |
911 | reverse_rows (matrix, first + by, last); | |
912 | reverse_rows (matrix, first, last); | |
913 | } | |
914 | else if (by > 0) | |
915 | { | |
916 | /* Down (rotate right, i.e. towards higher indices). */ | |
917 | reverse_rows (matrix, last - by, last); | |
918 | reverse_rows (matrix, first, last - by); | |
919 | reverse_rows (matrix, first, last); | |
920 | } | |
921 | } | |
922 | ||
923 | ||
924 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
925 | with indices START <= index < END. Increment positions by DELTA/ | |
926 | DELTA_BYTES. */ | |
927 | ||
928 | void | |
86c11ba1 | 929 | increment_matrix_positions (matrix, start, end, delta, delta_bytes) |
5f5c8ee5 GM |
930 | struct glyph_matrix *matrix; |
931 | int start, end, delta, delta_bytes; | |
932 | { | |
933 | /* Check that START and END are reasonable values. */ | |
934 | xassert (start >= 0 && start <= matrix->nrows); | |
935 | xassert (end >= 0 && end <= matrix->nrows); | |
936 | xassert (start <= end); | |
937 | ||
938 | for (; start < end; ++start) | |
86c11ba1 | 939 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
940 | } |
941 | ||
942 | ||
943 | /* Enable a range of rows in glyph matrix MATRIX. START and END are | |
944 | the row indices of the first and last + 1 row to enable. If | |
945 | ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */ | |
946 | ||
947 | void | |
948 | enable_glyph_matrix_rows (matrix, start, end, enabled_p) | |
949 | struct glyph_matrix *matrix; | |
950 | int start, end; | |
951 | int enabled_p; | |
952 | { | |
3ed36514 GM |
953 | xassert (start <= end); |
954 | xassert (start >= 0 && start < matrix->nrows); | |
955 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 956 | |
5f5c8ee5 GM |
957 | for (; start < end; ++start) |
958 | matrix->rows[start].enabled_p = enabled_p != 0; | |
959 | } | |
960 | ||
961 | ||
962 | /* Clear MATRIX. | |
963 | ||
964 | This empties all rows in MATRIX by setting the enabled_p flag for | |
965 | all rows of the matrix to zero. The function prepare_desired_row | |
966 | will eventually really clear a row when it sees one with a zero | |
967 | enabled_p flag. | |
968 | ||
969 | Resets update hints to defaults value. The only update hint | |
970 | currently present is the flag MATRIX->no_scrolling_p. */ | |
971 | ||
972 | void | |
973 | clear_glyph_matrix (matrix) | |
974 | struct glyph_matrix *matrix; | |
975 | { | |
976 | if (matrix) | |
977 | { | |
978 | enable_glyph_matrix_rows (matrix, 0, matrix->nrows, 0); | |
979 | matrix->no_scrolling_p = 0; | |
980 | } | |
981 | } | |
177c0ea7 | 982 | |
5f5c8ee5 GM |
983 | |
984 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
985 | Increment y-positions in glyph rows between START and END by DY, | |
986 | and recompute their visible height. */ | |
987 | ||
988 | void | |
989 | shift_glyph_matrix (w, matrix, start, end, dy) | |
990 | struct window *w; | |
991 | struct glyph_matrix *matrix; | |
992 | int start, end, dy; | |
993 | { | |
994 | int min_y, max_y; | |
177c0ea7 | 995 | |
5f5c8ee5 GM |
996 | xassert (start <= end); |
997 | xassert (start >= 0 && start < matrix->nrows); | |
998 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 999 | |
7df02016 KS |
1000 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
1001 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 1002 | |
5f5c8ee5 GM |
1003 | for (; start < end; ++start) |
1004 | { | |
1005 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 1006 | |
5f5c8ee5 | 1007 | row->y += dy; |
d6c747a4 | 1008 | row->visible_height = row->height; |
177c0ea7 | 1009 | |
5f5c8ee5 | 1010 | if (row->y < min_y) |
d6c747a4 GM |
1011 | row->visible_height -= min_y - row->y; |
1012 | if (row->y + row->height > max_y) | |
1013 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
1014 | } |
1015 | } | |
1016 | ||
1017 | ||
1018 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
1019 | invalid is done by setting enabled_p to zero for all rows in a | |
1020 | current matrix. */ | |
1021 | ||
1022 | void | |
1023 | clear_current_matrices (f) | |
1024 | register struct frame *f; | |
1025 | { | |
1026 | /* Clear frame current matrix, if we have one. */ | |
1027 | if (f->current_matrix) | |
1028 | clear_glyph_matrix (f->current_matrix); | |
1029 | ||
1030 | /* Clear the matrix of the menu bar window, if such a window exists. | |
1031 | The menu bar window is currently used to display menus on X when | |
1032 | no toolkit support is compiled in. */ | |
1033 | if (WINDOWP (f->menu_bar_window)) | |
1034 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
1035 | ||
9ea173e8 GM |
1036 | /* Clear the matrix of the tool-bar window, if any. */ |
1037 | if (WINDOWP (f->tool_bar_window)) | |
1038 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
5f5c8ee5 GM |
1039 | |
1040 | /* Clear current window matrices. */ | |
1041 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
1042 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); | |
1043 | } | |
1044 | ||
1045 | ||
1046 | /* Clear out all display lines of F for a coming redisplay. */ | |
1047 | ||
1048 | void | |
1049 | clear_desired_matrices (f) | |
1050 | register struct frame *f; | |
1051 | { | |
1052 | if (f->desired_matrix) | |
1053 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 1054 | |
5f5c8ee5 GM |
1055 | if (WINDOWP (f->menu_bar_window)) |
1056 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
1057 | ||
9ea173e8 GM |
1058 | if (WINDOWP (f->tool_bar_window)) |
1059 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
5f5c8ee5 GM |
1060 | |
1061 | /* Do it for window matrices. */ | |
1062 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
1063 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
1064 | } | |
1065 | ||
1066 | ||
1067 | /* Clear matrices in window tree rooted in W. If DESIRED_P is | |
1068 | non-zero clear desired matrices, otherwise clear current matrices. */ | |
1069 | ||
1070 | static void | |
1071 | clear_window_matrices (w, desired_p) | |
1072 | struct window *w; | |
1073 | int desired_p; | |
1074 | { | |
1075 | while (w) | |
1076 | { | |
1077 | if (!NILP (w->hchild)) | |
1078 | { | |
1079 | xassert (WINDOWP (w->hchild)); | |
1080 | clear_window_matrices (XWINDOW (w->hchild), desired_p); | |
1081 | } | |
1082 | else if (!NILP (w->vchild)) | |
1083 | { | |
1084 | xassert (WINDOWP (w->vchild)); | |
1085 | clear_window_matrices (XWINDOW (w->vchild), desired_p); | |
1086 | } | |
1087 | else | |
1088 | { | |
1089 | if (desired_p) | |
1090 | clear_glyph_matrix (w->desired_matrix); | |
1091 | else | |
1092 | { | |
1093 | clear_glyph_matrix (w->current_matrix); | |
1094 | w->window_end_valid = Qnil; | |
1095 | } | |
1096 | } | |
1097 | ||
1098 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
1099 | } | |
1100 | } | |
1101 | ||
1102 | ||
1103 | \f | |
1104 | /*********************************************************************** | |
1105 | Glyph Rows | |
1106 | ||
1107 | See dispextern.h for an overall explanation of glyph rows. | |
1108 | ***********************************************************************/ | |
1109 | ||
1110 | /* Clear glyph row ROW. Do it in a way that makes it robust against | |
1111 | changes in the glyph_row structure, i.e. addition or removal of | |
1112 | structure members. */ | |
1113 | ||
2cca872d KH |
1114 | static struct glyph_row null_row; |
1115 | ||
5f5c8ee5 GM |
1116 | void |
1117 | clear_glyph_row (row) | |
1118 | struct glyph_row *row; | |
1119 | { | |
1120 | struct glyph *p[1 + LAST_AREA]; | |
5f5c8ee5 GM |
1121 | |
1122 | /* Save pointers. */ | |
1123 | p[LEFT_MARGIN_AREA] = row->glyphs[LEFT_MARGIN_AREA]; | |
1124 | p[TEXT_AREA] = row->glyphs[TEXT_AREA]; | |
1125 | p[RIGHT_MARGIN_AREA] = row->glyphs[RIGHT_MARGIN_AREA]; | |
1126 | p[LAST_AREA] = row->glyphs[LAST_AREA]; | |
1127 | ||
1128 | /* Clear. */ | |
1129 | *row = null_row; | |
1130 | ||
1131 | /* Restore pointers. */ | |
1132 | row->glyphs[LEFT_MARGIN_AREA] = p[LEFT_MARGIN_AREA]; | |
1133 | row->glyphs[TEXT_AREA] = p[TEXT_AREA]; | |
1134 | row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA]; | |
1135 | row->glyphs[LAST_AREA] = p[LAST_AREA]; | |
45560b1a GM |
1136 | |
1137 | #if 0 /* At some point, some bit-fields of struct glyph were not set, | |
1138 | which made glyphs unequal when compared with GLYPH_EQUAL_P. | |
1139 | Redisplay outputs such glyphs, and flickering effects were | |
1140 | the result. This also depended on the contents of memory | |
1141 | returned by xmalloc. If flickering happens again, activate | |
153a073c | 1142 | the code below. If the flickering is gone with that, chances |
45560b1a GM |
1143 | are that the flickering has the same reason as here. */ |
1144 | bzero (p[0], (char *) p[LAST_AREA] - (char *) p[0]); | |
1145 | #endif | |
5f5c8ee5 GM |
1146 | } |
1147 | ||
1148 | ||
1149 | /* Make ROW an empty, enabled row of canonical character height, | |
1150 | in window W starting at y-position Y. */ | |
1151 | ||
1152 | void | |
1153 | blank_row (w, row, y) | |
1154 | struct window *w; | |
1155 | struct glyph_row *row; | |
1156 | int y; | |
1157 | { | |
1158 | int min_y, max_y; | |
177c0ea7 | 1159 | |
7df02016 KS |
1160 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
1161 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 1162 | |
5f5c8ee5 GM |
1163 | clear_glyph_row (row); |
1164 | row->y = y; | |
408f5064 | 1165 | row->ascent = row->phys_ascent = 0; |
7df02016 | 1166 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 1167 | row->visible_height = row->height; |
177c0ea7 | 1168 | |
5f5c8ee5 | 1169 | if (row->y < min_y) |
d6c747a4 GM |
1170 | row->visible_height -= min_y - row->y; |
1171 | if (row->y + row->height > max_y) | |
1172 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
1173 | |
1174 | row->enabled_p = 1; | |
1175 | } | |
1176 | ||
1177 | ||
1178 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
1179 | are the amounts by which to change positions. Note that the first | |
1180 | glyph of the text area of a row can have a buffer position even if | |
1181 | the used count of the text area is zero. Such rows display line | |
1182 | ends. */ | |
1183 | ||
1184 | void | |
86c11ba1 | 1185 | increment_row_positions (row, delta, delta_bytes) |
5f5c8ee5 GM |
1186 | struct glyph_row *row; |
1187 | int delta, delta_bytes; | |
1188 | { | |
1189 | int area, i; | |
1190 | ||
1191 | /* Increment start and end positions. */ | |
1192 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
1193 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
1194 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
1195 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
1196 | ||
5cacdcfd KS |
1197 | if (!row->enabled_p) |
1198 | return; | |
1199 | ||
5f5c8ee5 GM |
1200 | /* Increment positions in glyphs. */ |
1201 | for (area = 0; area < LAST_AREA; ++area) | |
1202 | for (i = 0; i < row->used[area]; ++i) | |
1203 | if (BUFFERP (row->glyphs[area][i].object) | |
1204 | && row->glyphs[area][i].charpos > 0) | |
1205 | row->glyphs[area][i].charpos += delta; | |
1206 | ||
1207 | /* Capture the case of rows displaying a line end. */ | |
1208 | if (row->used[TEXT_AREA] == 0 | |
1209 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1210 | row->glyphs[TEXT_AREA]->charpos += delta; | |
1211 | } | |
1212 | ||
1213 | ||
9af3e742 | 1214 | #if 0 |
5f5c8ee5 GM |
1215 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
1216 | contents, i.e. glyph structure contents are exchanged between A and | |
1217 | B without changing glyph pointers in A and B. */ | |
1218 | ||
1219 | static void | |
1220 | swap_glyphs_in_rows (a, b) | |
1221 | struct glyph_row *a, *b; | |
1222 | { | |
1223 | int area; | |
1224 | ||
1225 | for (area = 0; area < LAST_AREA; ++area) | |
1226 | { | |
1227 | /* Number of glyphs to swap. */ | |
1228 | int max_used = max (a->used[area], b->used[area]); | |
1229 | ||
1230 | /* Start of glyphs in area of row A. */ | |
1231 | struct glyph *glyph_a = a->glyphs[area]; | |
1232 | ||
1233 | /* End + 1 of glyphs in area of row A. */ | |
1234 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
1235 | ||
1236 | /* Start of glyphs in area of row B. */ | |
1237 | struct glyph *glyph_b = b->glyphs[area]; | |
1238 | ||
1239 | while (glyph_a < glyph_a_end) | |
1240 | { | |
1241 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
1242 | initialization. */ | |
1243 | struct glyph temp; | |
1244 | temp = *glyph_a; | |
1245 | *glyph_a = *glyph_b; | |
1246 | *glyph_b = temp; | |
1247 | ++glyph_a; | |
1248 | ++glyph_b; | |
1249 | } | |
1250 | } | |
1251 | } | |
1252 | ||
9af3e742 | 1253 | #endif /* 0 */ |
5f5c8ee5 GM |
1254 | |
1255 | /* Exchange pointers to glyph memory between glyph rows A and B. */ | |
1256 | ||
1257 | static INLINE void | |
1258 | swap_glyph_pointers (a, b) | |
1259 | struct glyph_row *a, *b; | |
1260 | { | |
1261 | int i; | |
1262 | for (i = 0; i < LAST_AREA + 1; ++i) | |
1263 | { | |
1264 | struct glyph *temp = a->glyphs[i]; | |
1265 | a->glyphs[i] = b->glyphs[i]; | |
1266 | b->glyphs[i] = temp; | |
1267 | } | |
1268 | } | |
1269 | ||
1270 | ||
1271 | /* Copy glyph row structure FROM to glyph row structure TO, except | |
1272 | that glyph pointers in the structures are left unchanged. */ | |
1273 | ||
1274 | INLINE void | |
1275 | copy_row_except_pointers (to, from) | |
1276 | struct glyph_row *to, *from; | |
1277 | { | |
1278 | struct glyph *pointers[1 + LAST_AREA]; | |
1279 | ||
1280 | /* Save glyph pointers of TO. */ | |
1281 | bcopy (to->glyphs, pointers, sizeof to->glyphs); | |
1282 | ||
1283 | /* Do a structure assignment. */ | |
1284 | *to = *from; | |
1285 | ||
1286 | /* Restore original pointers of TO. */ | |
1287 | bcopy (pointers, to->glyphs, sizeof to->glyphs); | |
1288 | } | |
1289 | ||
1290 | ||
1291 | /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in | |
1292 | TO and FROM are left unchanged. Glyph contents are copied from the | |
1293 | glyph memory of FROM to the glyph memory of TO. Increment buffer | |
1294 | positions in row TO by DELTA/ DELTA_BYTES. */ | |
1295 | ||
1296 | void | |
1297 | copy_glyph_row_contents (to, from, delta, delta_bytes) | |
1298 | struct glyph_row *to, *from; | |
1299 | int delta, delta_bytes; | |
1300 | { | |
1301 | int area; | |
1302 | ||
1303 | /* This is like a structure assignment TO = FROM, except that | |
1304 | glyph pointers in the rows are left unchanged. */ | |
1305 | copy_row_except_pointers (to, from); | |
1306 | ||
1307 | /* Copy glyphs from FROM to TO. */ | |
1308 | for (area = 0; area < LAST_AREA; ++area) | |
1309 | if (from->used[area]) | |
177c0ea7 | 1310 | bcopy (from->glyphs[area], to->glyphs[area], |
5f5c8ee5 GM |
1311 | from->used[area] * sizeof (struct glyph)); |
1312 | ||
1313 | /* Increment buffer positions in TO by DELTA. */ | |
86c11ba1 | 1314 | increment_row_positions (to, delta, delta_bytes); |
5f5c8ee5 GM |
1315 | } |
1316 | ||
1317 | ||
1318 | /* Assign glyph row FROM to glyph row TO. This works like a structure | |
1319 | assignment TO = FROM, except that glyph pointers are not copied but | |
1320 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1321 | a memory leak. */ | |
1322 | ||
1323 | static INLINE void | |
1324 | assign_row (to, from) | |
1325 | struct glyph_row *to, *from; | |
1326 | { | |
1327 | swap_glyph_pointers (to, from); | |
1328 | copy_row_except_pointers (to, from); | |
1329 | } | |
1330 | ||
1331 | ||
1332 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1333 | a row in a window matrix, is a slice of the glyph memory of the | |
1334 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
1335 | is non-zero if the glyph memory of WINDOW_ROW is part of the glyph | |
1336 | memory of FRAME_ROW. */ | |
1337 | ||
2d5912c1 | 1338 | #if GLYPH_DEBUG |
9339e87f | 1339 | |
5f5c8ee5 GM |
1340 | static int |
1341 | glyph_row_slice_p (window_row, frame_row) | |
1342 | struct glyph_row *window_row, *frame_row; | |
1343 | { | |
1344 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1345 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1346 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1347 | ||
1348 | return (frame_glyph_start <= window_glyph_start | |
1349 | && window_glyph_start < frame_glyph_end); | |
1350 | } | |
1351 | ||
9339e87f | 1352 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1353 | |
9af3e742 GM |
1354 | #if 0 |
1355 | ||
5f5c8ee5 GM |
1356 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1357 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1358 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1359 | ||
1360 | static struct glyph_row * | |
1361 | find_glyph_row_slice (window_matrix, frame_matrix, row) | |
1362 | struct glyph_matrix *window_matrix, *frame_matrix; | |
1363 | int row; | |
1364 | { | |
1365 | int i; | |
1366 | ||
1367 | xassert (row >= 0 && row < frame_matrix->nrows); | |
1368 | ||
1369 | for (i = 0; i < window_matrix->nrows; ++i) | |
1370 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1371 | frame_matrix->rows + row)) | |
1372 | break; | |
1373 | ||
1374 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1375 | } | |
1376 | ||
9af3e742 | 1377 | #endif /* 0 */ |
5f5c8ee5 GM |
1378 | |
1379 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1380 | i.e. they are only marked as to be cleared by setting their | |
1381 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1382 | call to this function really clears it. */ | |
1383 | ||
1384 | void | |
1385 | prepare_desired_row (row) | |
1386 | struct glyph_row *row; | |
1387 | { | |
1388 | if (!row->enabled_p) | |
1389 | { | |
1390 | clear_glyph_row (row); | |
1391 | row->enabled_p = 1; | |
1392 | } | |
1393 | } | |
1394 | ||
1395 | ||
1396 | /* Return a hash code for glyph row ROW. */ | |
1397 | ||
1398 | int | |
1399 | line_hash_code (row) | |
1400 | struct glyph_row *row; | |
1401 | { | |
1402 | int hash = 0; | |
177c0ea7 | 1403 | |
5f5c8ee5 GM |
1404 | if (row->enabled_p) |
1405 | { | |
4cecaab8 MB |
1406 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1407 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1408 | ||
1409 | while (glyph < end) | |
1410 | { | |
1411 | int c = glyph->u.ch; | |
1412 | int face_id = glyph->face_id; | |
daf01701 | 1413 | if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
4cecaab8 MB |
1414 | c -= SPACEGLYPH; |
1415 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1416 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1417 | ++glyph; | |
1418 | } | |
5f5c8ee5 | 1419 | |
4cecaab8 MB |
1420 | if (hash == 0) |
1421 | hash = 1; | |
5f5c8ee5 GM |
1422 | } |
1423 | ||
1424 | return hash; | |
1425 | } | |
1426 | ||
1427 | ||
153a073c | 1428 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1429 | the number of characters in the line. If must_write_spaces is |
1430 | zero, leading and trailing spaces are ignored. */ | |
1431 | ||
1432 | static unsigned int | |
1433 | line_draw_cost (matrix, vpos) | |
1434 | struct glyph_matrix *matrix; | |
1435 | int vpos; | |
1436 | { | |
1437 | struct glyph_row *row = matrix->rows + vpos; | |
1438 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1439 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1440 | int len; | |
1441 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
1442 | int glyph_table_len = GLYPH_TABLE_LENGTH; | |
1443 | ||
1444 | /* Ignore trailing and leading spaces if we can. */ | |
daf01701 | 1445 | if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
5f5c8ee5 GM |
1446 | { |
1447 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1448 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1449 | --end; |
1450 | ||
177c0ea7 | 1451 | /* All blank line. */ |
5f5c8ee5 GM |
1452 | if (end == beg) |
1453 | return 0; | |
1454 | ||
1455 | /* Skip over leading spaces. */ | |
1456 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1457 | ++beg; | |
1458 | } | |
1459 | ||
1460 | /* If we don't have a glyph-table, each glyph is one character, | |
1461 | so return the number of glyphs. */ | |
1462 | if (glyph_table_base == 0) | |
1463 | len = end - beg; | |
1464 | else | |
1465 | { | |
1466 | /* Otherwise, scan the glyphs and accumulate their total length | |
1467 | in LEN. */ | |
1468 | len = 0; | |
1469 | while (beg < end) | |
1470 | { | |
3fc809e2 | 1471 | GLYPH g; |
177c0ea7 | 1472 | |
3fc809e2 KS |
1473 | SET_GLYPH_FROM_CHAR_GLYPH (g, *beg); |
1474 | ||
565b39a8 | 1475 | if (GLYPH_INVALID_P (g) |
42186983 | 1476 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) |
5f5c8ee5 GM |
1477 | len += 1; |
1478 | else | |
1479 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1480 | |
5f5c8ee5 GM |
1481 | ++beg; |
1482 | } | |
1483 | } | |
177c0ea7 | 1484 | |
5f5c8ee5 GM |
1485 | return len; |
1486 | } | |
1487 | ||
1488 | ||
1489 | /* Test two glyph rows A and B for equality. Value is non-zero if A | |
1490 | and B have equal contents. W is the window to which the glyphs | |
1491 | rows A and B belong. It is needed here to test for partial row | |
e4e0bee9 GM |
1492 | visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p |
1493 | flags of A and B, too. */ | |
5f5c8ee5 | 1494 | |
177c0ea7 | 1495 | static INLINE int |
e4e0bee9 | 1496 | row_equal_p (w, a, b, mouse_face_p) |
5f5c8ee5 GM |
1497 | struct window *w; |
1498 | struct glyph_row *a, *b; | |
e4e0bee9 | 1499 | int mouse_face_p; |
5f5c8ee5 GM |
1500 | { |
1501 | if (a == b) | |
1502 | return 1; | |
1503 | else if (a->hash != b->hash) | |
1504 | return 0; | |
1505 | else | |
1506 | { | |
1507 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1508 | int area; | |
1509 | ||
e4e0bee9 GM |
1510 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1511 | return 0; | |
1512 | ||
5f5c8ee5 GM |
1513 | /* Compare glyphs. */ |
1514 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1515 | { | |
1516 | if (a->used[area] != b->used[area]) | |
1517 | return 0; | |
177c0ea7 | 1518 | |
5f5c8ee5 GM |
1519 | a_glyph = a->glyphs[area]; |
1520 | a_end = a_glyph + a->used[area]; | |
1521 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1522 | |
5f5c8ee5 GM |
1523 | while (a_glyph < a_end |
1524 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1525 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1526 | |
5f5c8ee5 GM |
1527 | if (a_glyph != a_end) |
1528 | return 0; | |
1529 | } | |
1530 | ||
6b61353c KH |
1531 | if (a->fill_line_p != b->fill_line_p |
1532 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1533 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
1534 | || a->left_fringe_face_id != b->left_fringe_face_id | |
1535 | || a->right_fringe_bitmap != b->right_fringe_bitmap | |
1536 | || a->right_fringe_face_id != b->right_fringe_face_id | |
3d4a365f | 1537 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
6b61353c | 1538 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1539 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1540 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1541 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
1542 | /* Different partially visible characters on left margin. */ | |
1543 | || a->x != b->x | |
1544 | /* Different height. */ | |
1545 | || a->ascent != b->ascent | |
408f5064 GM |
1546 | || a->phys_ascent != b->phys_ascent |
1547 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1548 | || a->visible_height != b->visible_height) |
1549 | return 0; | |
1550 | } | |
1551 | ||
1552 | return 1; | |
1553 | } | |
1554 | ||
1555 | ||
1556 | \f | |
1557 | /*********************************************************************** | |
1558 | Glyph Pool | |
1559 | ||
1560 | See dispextern.h for an overall explanation of glyph pools. | |
1561 | ***********************************************************************/ | |
1562 | ||
1563 | /* Allocate a glyph_pool structure. The structure returned is | |
1564 | initialized with zeros. The global variable glyph_pool_count is | |
1565 | incremented for each pool allocated. */ | |
1566 | ||
1567 | static struct glyph_pool * | |
1568 | new_glyph_pool () | |
1569 | { | |
1570 | struct glyph_pool *result; | |
1571 | ||
1572 | /* Allocate a new glyph_pool and clear it. */ | |
1573 | result = (struct glyph_pool *) xmalloc (sizeof *result); | |
1574 | bzero (result, sizeof *result); | |
177c0ea7 | 1575 | |
5f5c8ee5 GM |
1576 | /* For memory leak and double deletion checking. */ |
1577 | ++glyph_pool_count; | |
177c0ea7 | 1578 | |
5f5c8ee5 GM |
1579 | return result; |
1580 | } | |
1581 | ||
1582 | ||
1583 | /* Free a glyph_pool structure POOL. The function may be called with | |
1584 | a null POOL pointer. The global variable glyph_pool_count is | |
1585 | decremented with every pool structure freed. If this count gets | |
1586 | negative, more structures were freed than allocated, i.e. one | |
1587 | structure must have been freed more than once or a bogus pointer | |
1588 | was passed to free_glyph_pool. */ | |
1589 | ||
1590 | static void | |
1591 | free_glyph_pool (pool) | |
1592 | struct glyph_pool *pool; | |
1593 | { | |
1594 | if (pool) | |
1595 | { | |
153a073c | 1596 | /* More freed than allocated? */ |
5f5c8ee5 GM |
1597 | --glyph_pool_count; |
1598 | xassert (glyph_pool_count >= 0); | |
1599 | ||
1600 | xfree (pool->glyphs); | |
1601 | xfree (pool); | |
1602 | } | |
1603 | } | |
1604 | ||
1605 | ||
1606 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1607 | columns we need. This function never shrinks a pool. The only | |
1608 | case in which this would make sense, would be when a frame's size | |
1609 | is changed from a large value to a smaller one. But, if someone | |
1610 | does it once, we can expect that he will do it again. | |
1611 | ||
1612 | Value is non-zero if the pool changed in a way which makes | |
1613 | re-adjusting window glyph matrices necessary. */ | |
1614 | ||
1615 | static int | |
1616 | realloc_glyph_pool (pool, matrix_dim) | |
1617 | struct glyph_pool *pool; | |
1618 | struct dim matrix_dim; | |
1619 | { | |
1620 | int needed; | |
1621 | int changed_p; | |
1622 | ||
1623 | changed_p = (pool->glyphs == 0 | |
1624 | || matrix_dim.height != pool->nrows | |
1625 | || matrix_dim.width != pool->ncolumns); | |
1626 | ||
1627 | /* Enlarge the glyph pool. */ | |
1628 | needed = matrix_dim.width * matrix_dim.height; | |
1629 | if (needed > pool->nglyphs) | |
1630 | { | |
1631 | int size = needed * sizeof (struct glyph); | |
1632 | ||
1633 | if (pool->glyphs) | |
1634 | pool->glyphs = (struct glyph *) xrealloc (pool->glyphs, size); | |
1635 | else | |
1636 | { | |
1637 | pool->glyphs = (struct glyph *) xmalloc (size); | |
1638 | bzero (pool->glyphs, size); | |
1639 | } | |
1640 | ||
1641 | pool->nglyphs = needed; | |
1642 | } | |
1643 | ||
153a073c | 1644 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1645 | to do sanity checks, and (b) the number of columns determines |
1646 | where rows in the frame matrix start---this must be available to | |
1647 | determine pointers to rows of window sub-matrices. */ | |
1648 | pool->nrows = matrix_dim.height; | |
1649 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1650 | |
5f5c8ee5 GM |
1651 | return changed_p; |
1652 | } | |
1653 | ||
1654 | ||
1655 | \f | |
1656 | /*********************************************************************** | |
1657 | Debug Code | |
1658 | ***********************************************************************/ | |
1659 | ||
1660 | #if GLYPH_DEBUG | |
1661 | ||
a13396c9 | 1662 | |
28d440ab KL |
1663 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1664 | XXX Maybe this should be changed to flush the current terminal instead of | |
1665 | stdout. | |
1666 | */ | |
a13396c9 GM |
1667 | |
1668 | void | |
1669 | flush_stdout () | |
1670 | { | |
1671 | fflush (stdout); | |
1672 | } | |
1673 | ||
1674 | ||
5f5c8ee5 GM |
1675 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1676 | pointer has been lost, e.g. by using a structure assignment between | |
1677 | rows, at least one pointer must occur more than once in the rows of | |
1678 | MATRIX. */ | |
1679 | ||
1680 | void | |
1681 | check_matrix_pointer_lossage (matrix) | |
1682 | struct glyph_matrix *matrix; | |
1683 | { | |
1684 | int i, j; | |
177c0ea7 | 1685 | |
5f5c8ee5 GM |
1686 | for (i = 0; i < matrix->nrows; ++i) |
1687 | for (j = 0; j < matrix->nrows; ++j) | |
1688 | xassert (i == j | |
1689 | || (matrix->rows[i].glyphs[TEXT_AREA] | |
1690 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1691 | } | |
1692 | ||
1693 | ||
1694 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1695 | ||
1696 | struct glyph_row * | |
1697 | matrix_row (matrix, row) | |
1698 | struct glyph_matrix *matrix; | |
1699 | int row; | |
1700 | { | |
1701 | xassert (matrix && matrix->rows); | |
1702 | xassert (row >= 0 && row < matrix->nrows); | |
1703 | ||
1704 | /* That's really too slow for normal testing because this function | |
1705 | is called almost everywhere. Although---it's still astonishingly | |
1706 | fast, so it is valuable to have for debugging purposes. */ | |
1707 | #if 0 | |
1708 | check_matrix_pointer_lossage (matrix); | |
1709 | #endif | |
177c0ea7 | 1710 | |
5f5c8ee5 GM |
1711 | return matrix->rows + row; |
1712 | } | |
1713 | ||
1714 | ||
1715 | #if 0 /* This function makes invalid assumptions when text is | |
1716 | partially invisible. But it might come handy for debugging | |
1717 | nevertheless. */ | |
1718 | ||
1719 | /* Check invariants that must hold for an up to date current matrix of | |
1720 | window W. */ | |
1721 | ||
1722 | static void | |
1723 | check_matrix_invariants (w) | |
1724 | struct window *w; | |
1725 | { | |
1726 | struct glyph_matrix *matrix = w->current_matrix; | |
1727 | int yb = window_text_bottom_y (w); | |
1728 | struct glyph_row *row = matrix->rows; | |
1729 | struct glyph_row *last_text_row = NULL; | |
1730 | struct buffer *saved = current_buffer; | |
1731 | struct buffer *buffer = XBUFFER (w->buffer); | |
1732 | int c; | |
177c0ea7 | 1733 | |
5f5c8ee5 GM |
1734 | /* This can sometimes happen for a fresh window. */ |
1735 | if (matrix->nrows < 2) | |
1736 | return; | |
1737 | ||
1738 | set_buffer_temp (buffer); | |
1739 | ||
1740 | /* Note: last row is always reserved for the mode line. */ | |
1741 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1742 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1743 | { | |
1744 | struct glyph_row *next = row + 1; | |
1745 | ||
1746 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1747 | last_text_row = row; | |
1748 | ||
1749 | /* Check that character and byte positions are in sync. */ | |
1750 | xassert (MATRIX_ROW_START_BYTEPOS (row) | |
1751 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); | |
1752 | ||
1753 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1754 | have such a position temporarily in case of a minibuffer | |
1755 | displaying something like `[Sole completion]' at its end. */ | |
1756 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
1757 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1758 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); | |
1759 | ||
1760 | /* Check that end position of `row' is equal to start position | |
1761 | of next row. */ | |
1762 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1763 | { | |
1764 | xassert (MATRIX_ROW_END_CHARPOS (row) | |
1765 | == MATRIX_ROW_START_CHARPOS (next)); | |
1766 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1767 | == MATRIX_ROW_START_BYTEPOS (next)); | |
1768 | } | |
1769 | row = next; | |
1770 | } | |
1771 | ||
1772 | xassert (w->current_matrix->nrows == w->desired_matrix->nrows); | |
1773 | xassert (w->desired_matrix->rows != NULL); | |
1774 | set_buffer_temp (saved); | |
1775 | } | |
1776 | ||
1777 | #endif /* 0 */ | |
1778 | ||
1779 | #endif /* GLYPH_DEBUG != 0 */ | |
1780 | ||
1781 | ||
1782 | \f | |
1783 | /********************************************************************** | |
1784 | Allocating/ Adjusting Glyph Matrices | |
1785 | **********************************************************************/ | |
1786 | ||
1787 | /* Allocate glyph matrices over a window tree for a frame-based | |
1788 | redisplay | |
1789 | ||
1790 | X and Y are column/row within the frame glyph matrix where | |
1791 | sub-matrices for the window tree rooted at WINDOW must be | |
8ce2650d YM |
1792 | allocated. DIM_ONLY_P non-zero means that the caller of this |
1793 | function is only interested in the result matrix dimension, and | |
1794 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1795 | |
1796 | The function returns the total width/height of the sub-matrices of | |
1797 | the window tree. If called on a frame root window, the computation | |
1798 | will take the mini-buffer window into account. | |
1799 | ||
1800 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1801 | ||
1802 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1803 | glyph matrices yet, and | |
1804 | ||
1805 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1806 | any window in the tree will be changed or have been changed (see | |
153a073c | 1807 | DIM_ONLY_P) |
5f5c8ee5 GM |
1808 | |
1809 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1810 | function. | |
1811 | ||
1812 | Windows are arranged into chains of windows on the same level | |
1813 | through the next fields of window structures. Such a level can be | |
1814 | either a sequence of horizontally adjacent windows from left to | |
1815 | right, or a sequence of vertically adjacent windows from top to | |
1816 | bottom. Each window in a horizontal sequence can be either a leaf | |
1817 | window or a vertical sequence; a window in a vertical sequence can | |
1818 | be either a leaf or a horizontal sequence. All windows in a | |
1819 | horizontal sequence have the same height, and all windows in a | |
1820 | vertical sequence have the same width. | |
1821 | ||
1822 | This function uses, for historical reasons, a more general | |
1823 | algorithm to determine glyph matrix dimensions that would be | |
1824 | necessary. | |
1825 | ||
1826 | The matrix height of a horizontal sequence is determined by the | |
1827 | maximum height of any matrix in the sequence. The matrix width of | |
1828 | a horizontal sequence is computed by adding up matrix widths of | |
1829 | windows in the sequence. | |
1830 | ||
1831 | |<------- result width ------->| | |
1832 | +---------+----------+---------+ --- | |
1833 | | | | | | | |
1834 | | | | | | |
1835 | +---------+ | | result height | |
1836 | | +---------+ | |
1837 | | | | | |
1838 | +----------+ --- | |
1839 | ||
1840 | The matrix width of a vertical sequence is the maximum matrix width | |
1841 | of any window in the sequence. Its height is computed by adding up | |
1842 | matrix heights of windows in the sequence. | |
1843 | ||
1844 | |<---- result width -->| | |
1845 | +---------+ --- | |
1846 | | | | | |
1847 | | | | | |
1848 | +---------+--+ | | |
1849 | | | | | |
1850 | | | result height | |
1851 | | | | |
1852 | +------------+---------+ | | |
1853 | | | | | |
1854 | | | | | |
1855 | +------------+---------+ --- */ | |
1856 | ||
1857 | /* Bit indicating that a new matrix will be allocated or has been | |
1858 | allocated. */ | |
1859 | ||
1860 | #define NEW_LEAF_MATRIX (1 << 0) | |
1861 | ||
1862 | /* Bit indicating that a matrix will or has changed its location or | |
1863 | size. */ | |
1864 | ||
1865 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1866 | ||
1867 | static struct dim | |
5d3cc43c GM |
1868 | allocate_matrices_for_frame_redisplay (window, x, y, dim_only_p, |
1869 | window_change_flags) | |
5f5c8ee5 GM |
1870 | Lisp_Object window; |
1871 | int x, y; | |
5f5c8ee5 GM |
1872 | int dim_only_p; |
1873 | int *window_change_flags; | |
1874 | { | |
1875 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1876 | int x0 = x, y0 = y; | |
1877 | int wmax = 0, hmax = 0; | |
1878 | struct dim total; | |
1879 | struct dim dim; | |
1880 | struct window *w; | |
1881 | int in_horz_combination_p; | |
1882 | ||
1883 | /* What combination is WINDOW part of? Compute this once since the | |
1884 | result is the same for all windows in the `next' chain. The | |
1885 | special case of a root window (parent equal to nil) is treated | |
1886 | like a vertical combination because a root window's `next' | |
1887 | points to the mini-buffer window, if any, which is arranged | |
1888 | vertically below other windows. */ | |
1889 | in_horz_combination_p | |
1890 | = (!NILP (XWINDOW (window)->parent) | |
1891 | && !NILP (XWINDOW (XWINDOW (window)->parent)->hchild)); | |
1892 | ||
1893 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1894 | do |
5f5c8ee5 GM |
1895 | { |
1896 | w = XWINDOW (window); | |
1897 | ||
1898 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1899 | on whether this is a combination or a leaf window. */ |
5f5c8ee5 | 1900 | if (!NILP (w->hchild)) |
177c0ea7 | 1901 | dim = allocate_matrices_for_frame_redisplay (w->hchild, x, y, |
5f5c8ee5 GM |
1902 | dim_only_p, |
1903 | window_change_flags); | |
1904 | else if (!NILP (w->vchild)) | |
177c0ea7 | 1905 | dim = allocate_matrices_for_frame_redisplay (w->vchild, x, y, |
5f5c8ee5 GM |
1906 | dim_only_p, |
1907 | window_change_flags); | |
1908 | else | |
1909 | { | |
1910 | /* If not already done, allocate sub-matrix structures. */ | |
1911 | if (w->desired_matrix == NULL) | |
1912 | { | |
1913 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1914 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1915 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1916 | } | |
177c0ea7 | 1917 | |
5f5c8ee5 GM |
1918 | /* Width and height MUST be chosen so that there are no |
1919 | holes in the frame matrix. */ | |
5d3cc43c GM |
1920 | dim.width = required_matrix_width (w); |
1921 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1922 | |
1923 | /* Will matrix be re-allocated? */ | |
1924 | if (x != w->desired_matrix->matrix_x | |
1925 | || y != w->desired_matrix->matrix_y | |
1926 | || dim.width != w->desired_matrix->matrix_w | |
1927 | || dim.height != w->desired_matrix->matrix_h | |
1928 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1929 | w->left_margin_cols) |
5f5c8ee5 GM |
1930 | != w->desired_matrix->left_margin_glyphs) |
1931 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1932 | w->right_margin_cols) |
5f5c8ee5 GM |
1933 | != w->desired_matrix->right_margin_glyphs)) |
1934 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1935 | ||
1936 | /* Actually change matrices, if allowed. Do not consider | |
1937 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1938 | may have been changed which we don't now here. We trust | |
1939 | that we only will be called with DIM_ONLY_P != 0 when | |
1940 | necessary. */ | |
1941 | if (!dim_only_p) | |
1942 | { | |
1943 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1944 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1945 | } | |
1946 | } | |
1947 | ||
1948 | /* If we are part of a horizontal combination, advance x for | |
1949 | windows to the right of W; otherwise advance y for windows | |
1950 | below W. */ | |
1951 | if (in_horz_combination_p) | |
1952 | x += dim.width; | |
177c0ea7 | 1953 | else |
5f5c8ee5 GM |
1954 | y += dim.height; |
1955 | ||
1956 | /* Remember maximum glyph matrix dimensions. */ | |
1957 | wmax = max (wmax, dim.width); | |
1958 | hmax = max (hmax, dim.height); | |
1959 | ||
1960 | /* Next window on same level. */ | |
1961 | window = w->next; | |
1962 | } | |
1963 | while (!NILP (window)); | |
1964 | ||
1965 | /* Set `total' to the total glyph matrix dimension of this window | |
1966 | level. In a vertical combination, the width is the width of the | |
1967 | widest window; the height is the y we finally reached, corrected | |
1968 | by the y we started with. In a horizontal combination, the total | |
1969 | height is the height of the tallest window, and the width is the | |
1970 | x we finally reached, corrected by the x we started with. */ | |
1971 | if (in_horz_combination_p) | |
1972 | { | |
1973 | total.width = x - x0; | |
1974 | total.height = hmax; | |
1975 | } | |
177c0ea7 | 1976 | else |
5f5c8ee5 GM |
1977 | { |
1978 | total.width = wmax; | |
1979 | total.height = y - y0; | |
1980 | } | |
1981 | ||
1982 | return total; | |
1983 | } | |
1984 | ||
1985 | ||
5d3cc43c GM |
1986 | /* Return the required height of glyph matrices for window W. */ |
1987 | ||
1988 | int | |
1989 | required_matrix_height (w) | |
1990 | struct window *w; | |
1991 | { | |
1992 | #ifdef HAVE_WINDOW_SYSTEM | |
1993 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 1994 | |
5d3cc43c GM |
1995 | if (FRAME_WINDOW_P (f)) |
1996 | { | |
1997 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1ea40aa2 | 1998 | int window_pixel_height = window_box_height (w) + eabs (w->vscroll); |
5d3cc43c | 1999 | return (((window_pixel_height + ch_height - 1) |
cc834cf9 | 2000 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
2001 | /* One partially visible line at the top and |
2002 | bottom of the window. */ | |
2003 | + 2 | |
153a073c | 2004 | /* 2 for header and mode line. */ |
5d3cc43c GM |
2005 | + 2); |
2006 | } | |
2007 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 2008 | |
7df02016 | 2009 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
2010 | } |
2011 | ||
2012 | ||
2013 | /* Return the required width of glyph matrices for window W. */ | |
2014 | ||
2015 | int | |
2016 | required_matrix_width (w) | |
2017 | struct window *w; | |
2018 | { | |
2019 | #ifdef HAVE_WINDOW_SYSTEM | |
2020 | struct frame *f = XFRAME (w->frame); | |
2021 | if (FRAME_WINDOW_P (f)) | |
2022 | { | |
2023 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 2024 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 2025 | |
5d3cc43c GM |
2026 | /* Compute number of glyphs needed in a glyph row. */ |
2027 | return (((window_pixel_width + ch_width - 1) | |
cc834cf9 | 2028 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
2029 | /* 2 partially visible columns in the text area. */ |
2030 | + 2 | |
2031 | /* One partially visible column at the right | |
2032 | edge of each marginal area. */ | |
2033 | + 1 + 1); | |
2034 | } | |
2035 | #endif /* HAVE_WINDOW_SYSTEM */ | |
2036 | ||
7df02016 | 2037 | return XINT (w->total_cols); |
5d3cc43c GM |
2038 | } |
2039 | ||
2040 | ||
5f5c8ee5 | 2041 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 2042 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 2043 | |
5f5c8ee5 | 2044 | static void |
5d3cc43c | 2045 | allocate_matrices_for_window_redisplay (w) |
5f5c8ee5 | 2046 | struct window *w; |
5f5c8ee5 | 2047 | { |
5f5c8ee5 GM |
2048 | while (w) |
2049 | { | |
2050 | if (!NILP (w->vchild)) | |
5d3cc43c | 2051 | allocate_matrices_for_window_redisplay (XWINDOW (w->vchild)); |
5f5c8ee5 | 2052 | else if (!NILP (w->hchild)) |
5d3cc43c | 2053 | allocate_matrices_for_window_redisplay (XWINDOW (w->hchild)); |
5f5c8ee5 GM |
2054 | else |
2055 | { | |
2056 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
2057 | struct dim dim; |
2058 | ||
2059 | /* If matrices are not yet allocated, allocate them now. */ | |
2060 | if (w->desired_matrix == NULL) | |
2061 | { | |
2062 | w->desired_matrix = new_glyph_matrix (NULL); | |
2063 | w->current_matrix = new_glyph_matrix (NULL); | |
2064 | } | |
2065 | ||
5d3cc43c GM |
2066 | dim.width = required_matrix_width (w); |
2067 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
2068 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
2069 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
2070 | } | |
177c0ea7 | 2071 | |
5f5c8ee5 GM |
2072 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
2073 | } | |
2074 | } | |
2075 | ||
2076 | ||
2077 | /* Re-allocate/ re-compute glyph matrices on frame F. If F is null, | |
2078 | do it for all frames; otherwise do it just for the given frame. | |
2079 | This function must be called when a new frame is created, its size | |
2080 | changes, or its window configuration changes. */ | |
2081 | ||
2082 | void | |
2083 | adjust_glyphs (f) | |
2084 | struct frame *f; | |
2085 | { | |
408f5064 GM |
2086 | /* Block input so that expose events and other events that access |
2087 | glyph matrices are not processed while we are changing them. */ | |
2088 | BLOCK_INPUT; | |
2089 | ||
5f5c8ee5 GM |
2090 | if (f) |
2091 | adjust_frame_glyphs (f); | |
2092 | else | |
2093 | { | |
2094 | Lisp_Object tail, lisp_frame; | |
177c0ea7 | 2095 | |
5f5c8ee5 GM |
2096 | FOR_EACH_FRAME (tail, lisp_frame) |
2097 | adjust_frame_glyphs (XFRAME (lisp_frame)); | |
2098 | } | |
408f5064 GM |
2099 | |
2100 | UNBLOCK_INPUT; | |
5f5c8ee5 GM |
2101 | } |
2102 | ||
2103 | ||
2104 | /* Adjust frame glyphs when Emacs is initialized. | |
177c0ea7 JB |
2105 | |
2106 | To be called from init_display. | |
2107 | ||
5f5c8ee5 GM |
2108 | We need a glyph matrix because redraw will happen soon. |
2109 | Unfortunately, window sizes on selected_frame are not yet set to | |
2110 | meaningful values. I believe we can assume that there are only two | |
2111 | windows on the frame---the mini-buffer and the root window. Frame | |
2112 | height and width seem to be correct so far. So, set the sizes of | |
2113 | windows to estimated values. */ | |
2114 | ||
2115 | static void | |
2116 | adjust_frame_glyphs_initially () | |
2117 | { | |
91fb7e1b GM |
2118 | struct frame *sf = SELECTED_FRAME (); |
2119 | struct window *root = XWINDOW (sf->root_window); | |
5f5c8ee5 | 2120 | struct window *mini = XWINDOW (root->next); |
7df02016 KS |
2121 | int frame_lines = FRAME_LINES (sf); |
2122 | int frame_cols = FRAME_COLS (sf); | |
91fb7e1b | 2123 | int top_margin = FRAME_TOP_MARGIN (sf); |
5f5c8ee5 GM |
2124 | |
2125 | /* Do it for the root window. */ | |
7df02016 KS |
2126 | XSETFASTINT (root->top_line, top_margin); |
2127 | XSETFASTINT (root->total_cols, frame_cols); | |
2128 | set_window_height (sf->root_window, frame_lines - 1 - top_margin, 0); | |
5f5c8ee5 GM |
2129 | |
2130 | /* Do it for the mini-buffer window. */ | |
7df02016 KS |
2131 | XSETFASTINT (mini->top_line, frame_lines - 1); |
2132 | XSETFASTINT (mini->total_cols, frame_cols); | |
5f5c8ee5 GM |
2133 | set_window_height (root->next, 1, 0); |
2134 | ||
91fb7e1b | 2135 | adjust_frame_glyphs (sf); |
5f5c8ee5 GM |
2136 | glyphs_initialized_initially_p = 1; |
2137 | } | |
177c0ea7 | 2138 | |
5f5c8ee5 GM |
2139 | |
2140 | /* Allocate/reallocate glyph matrices of a single frame F. */ | |
2141 | ||
2142 | static void | |
2143 | adjust_frame_glyphs (f) | |
2144 | struct frame *f; | |
2145 | { | |
2146 | if (FRAME_WINDOW_P (f)) | |
2147 | adjust_frame_glyphs_for_window_redisplay (f); | |
2148 | else | |
2149 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 2150 | |
5f5c8ee5 GM |
2151 | /* Don't forget the message buffer and the buffer for |
2152 | decode_mode_spec. */ | |
2153 | adjust_frame_message_buffer (f); | |
2154 | adjust_decode_mode_spec_buffer (f); | |
2155 | ||
2156 | f->glyphs_initialized_p = 1; | |
2157 | } | |
2158 | ||
075757cc CY |
2159 | /* Return 1 if any window in the tree has nonzero window margins. See |
2160 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ | |
2161 | static int | |
2162 | showing_window_margins_p (w) | |
2163 | struct window *w; | |
2164 | { | |
2165 | while (w) | |
2166 | { | |
2167 | if (!NILP (w->hchild)) | |
2168 | { | |
2169 | if (showing_window_margins_p (XWINDOW (w->hchild))) | |
2170 | return 1; | |
2171 | } | |
2172 | else if (!NILP (w->vchild)) | |
2173 | { | |
2174 | if (showing_window_margins_p (XWINDOW (w->vchild))) | |
2175 | return 1; | |
2176 | } | |
2177 | else if (!NILP (w->left_margin_cols) | |
2178 | || !NILP (w->right_margin_cols)) | |
2179 | return 1; | |
3fc809e2 | 2180 | |
075757cc CY |
2181 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2182 | } | |
2183 | return 0; | |
2184 | } | |
2185 | ||
5f5c8ee5 | 2186 | |
c9f00270 GM |
2187 | /* In the window tree with root W, build current matrices of leaf |
2188 | windows from the frame's current matrix. */ | |
2189 | ||
2190 | static void | |
2191 | fake_current_matrices (window) | |
2192 | Lisp_Object window; | |
2193 | { | |
2194 | struct window *w; | |
177c0ea7 | 2195 | |
c9f00270 GM |
2196 | for (; !NILP (window); window = w->next) |
2197 | { | |
2198 | w = XWINDOW (window); | |
177c0ea7 | 2199 | |
c9f00270 GM |
2200 | if (!NILP (w->hchild)) |
2201 | fake_current_matrices (w->hchild); | |
2202 | else if (!NILP (w->vchild)) | |
2203 | fake_current_matrices (w->vchild); | |
2204 | else | |
2205 | { | |
2206 | int i; | |
2207 | struct frame *f = XFRAME (w->frame); | |
2208 | struct glyph_matrix *m = w->current_matrix; | |
2209 | struct glyph_matrix *fm = f->current_matrix; | |
2210 | ||
7df02016 KS |
2211 | xassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
2212 | xassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 2213 | |
c9f00270 GM |
2214 | for (i = 0; i < m->matrix_h; ++i) |
2215 | { | |
2216 | struct glyph_row *r = m->rows + i; | |
7df02016 | 2217 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 GM |
2218 | |
2219 | xassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] | |
2220 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); | |
2221 | ||
2222 | r->enabled_p = fr->enabled_p; | |
2223 | if (r->enabled_p) | |
2224 | { | |
2225 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
2226 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
2227 | r->used[TEXT_AREA] = (m->matrix_w | |
2228 | - r->used[LEFT_MARGIN_AREA] | |
2229 | - r->used[RIGHT_MARGIN_AREA]); | |
2230 | r->mode_line_p = 0; | |
c9f00270 GM |
2231 | } |
2232 | } | |
2233 | } | |
2234 | } | |
2235 | } | |
2236 | ||
2237 | ||
bccee4f2 | 2238 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 2239 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 2240 | |
bccee4f2 GM |
2241 | static struct glyph_matrix * |
2242 | save_current_matrix (f) | |
31798cfe | 2243 | struct frame *f; |
c9f00270 | 2244 | { |
bccee4f2 GM |
2245 | int i; |
2246 | struct glyph_matrix *saved; | |
e797dea6 | 2247 | |
bccee4f2 GM |
2248 | saved = (struct glyph_matrix *) xmalloc (sizeof *saved); |
2249 | bzero (saved, sizeof *saved); | |
2250 | saved->nrows = f->current_matrix->nrows; | |
2251 | saved->rows = (struct glyph_row *) xmalloc (saved->nrows | |
2252 | * sizeof *saved->rows); | |
2253 | bzero (saved->rows, saved->nrows * sizeof *saved->rows); | |
2254 | ||
2255 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 2256 | { |
bccee4f2 GM |
2257 | struct glyph_row *from = f->current_matrix->rows + i; |
2258 | struct glyph_row *to = saved->rows + i; | |
2259 | size_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); | |
2260 | to->glyphs[TEXT_AREA] = (struct glyph *) xmalloc (nbytes); | |
2261 | bcopy (from->glyphs[TEXT_AREA], to->glyphs[TEXT_AREA], nbytes); | |
2262 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; | |
e797dea6 | 2263 | } |
bccee4f2 GM |
2264 | |
2265 | return saved; | |
2266 | } | |
2267 | ||
2268 | ||
2269 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
2270 | and free memory associated with SAVED. */ | |
2271 | ||
2272 | static void | |
2273 | restore_current_matrix (f, saved) | |
2274 | struct frame *f; | |
2275 | struct glyph_matrix *saved; | |
2276 | { | |
2277 | int i; | |
2278 | ||
2279 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 2280 | { |
bccee4f2 GM |
2281 | struct glyph_row *from = saved->rows + i; |
2282 | struct glyph_row *to = f->current_matrix->rows + i; | |
e797dea6 GM |
2283 | size_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
2284 | bcopy (from->glyphs[TEXT_AREA], to->glyphs[TEXT_AREA], nbytes); | |
2285 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; | |
bccee4f2 | 2286 | xfree (from->glyphs[TEXT_AREA]); |
e797dea6 | 2287 | } |
177c0ea7 | 2288 | |
bccee4f2 GM |
2289 | xfree (saved->rows); |
2290 | xfree (saved); | |
c9f00270 GM |
2291 | } |
2292 | ||
2293 | ||
bccee4f2 | 2294 | |
5f5c8ee5 GM |
2295 | /* Allocate/reallocate glyph matrices of a single frame F for |
2296 | frame-based redisplay. */ | |
2297 | ||
2298 | static void | |
2299 | adjust_frame_glyphs_for_frame_redisplay (f) | |
2300 | struct frame *f; | |
2301 | { | |
5f5c8ee5 GM |
2302 | struct dim matrix_dim; |
2303 | int pool_changed_p; | |
2304 | int window_change_flags; | |
2305 | int top_window_y; | |
2306 | ||
2307 | if (!FRAME_LIVE_P (f)) | |
2308 | return; | |
2309 | ||
5f5c8ee5 GM |
2310 | top_window_y = FRAME_TOP_MARGIN (f); |
2311 | ||
2312 | /* Allocate glyph pool structures if not already done. */ | |
2313 | if (f->desired_pool == NULL) | |
2314 | { | |
2315 | f->desired_pool = new_glyph_pool (); | |
2316 | f->current_pool = new_glyph_pool (); | |
2317 | } | |
2318 | ||
2319 | /* Allocate frames matrix structures if needed. */ | |
2320 | if (f->desired_matrix == NULL) | |
2321 | { | |
2322 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
2323 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
2324 | } | |
177c0ea7 | 2325 | |
5f5c8ee5 GM |
2326 | /* Compute window glyph matrices. (This takes the mini-buffer |
2327 | window into account). The result is the size of the frame glyph | |
2328 | matrix needed. The variable window_change_flags is set to a bit | |
2329 | mask indicating whether new matrices will be allocated or | |
2330 | existing matrices change their size or location within the frame | |
2331 | matrix. */ | |
2332 | window_change_flags = 0; | |
2333 | matrix_dim | |
2334 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
2335 | 0, top_window_y, | |
5d3cc43c | 2336 | 1, |
5f5c8ee5 GM |
2337 | &window_change_flags); |
2338 | ||
2339 | /* Add in menu bar lines, if any. */ | |
2340 | matrix_dim.height += top_window_y; | |
2341 | ||
2342 | /* Enlarge pools as necessary. */ | |
2343 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
2344 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
2345 | ||
177c0ea7 | 2346 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
2347 | absolutely necessary since it requires a frame redraw. */ |
2348 | if (pool_changed_p || window_change_flags) | |
2349 | { | |
2350 | /* Do it for window matrices. */ | |
2351 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 2352 | 0, top_window_y, 0, |
5f5c8ee5 GM |
2353 | &window_change_flags); |
2354 | ||
2355 | /* Size of frame matrices must equal size of frame. Note | |
2356 | that we are called for X frames with window widths NOT equal | |
2357 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
7df02016 KS |
2358 | xassert (matrix_dim.width == FRAME_COLS (f) |
2359 | && matrix_dim.height == FRAME_LINES (f)); | |
177c0ea7 | 2360 | |
e797dea6 GM |
2361 | /* Pointers to glyph memory in glyph rows are exchanged during |
2362 | the update phase of redisplay, which means in general that a | |
2363 | frame's current matrix consists of pointers into both the | |
2364 | desired and current glyph pool of the frame. Adjusting a | |
2365 | matrix sets the frame matrix up so that pointers are all into | |
2366 | the same pool. If we want to preserve glyph contents of the | |
2367 | current matrix over a call to adjust_glyph_matrix, we must | |
2368 | make a copy of the current glyphs, and restore the current | |
2369 | matrix' contents from that copy. */ | |
2370 | if (display_completed | |
2371 | && !FRAME_GARBAGED_P (f) | |
2372 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
2373 | && matrix_dim.height == f->current_matrix->matrix_h |
2374 | /* For some reason, the frame glyph matrix gets corrupted if | |
2375 | any of the windows contain margins. I haven't been able | |
2376 | to hunt down the reason, but for the moment this prevents | |
2377 | the problem from manifesting. -- cyd */ | |
2378 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) | |
e797dea6 | 2379 | { |
bccee4f2 GM |
2380 | struct glyph_matrix *copy = save_current_matrix (f); |
2381 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2382 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2383 | restore_current_matrix (f, copy); |
e797dea6 GM |
2384 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2385 | } | |
c9f00270 | 2386 | else |
e797dea6 | 2387 | { |
bccee4f2 | 2388 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2389 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2390 | SET_FRAME_GARBAGED (f); | |
2391 | } | |
5f5c8ee5 GM |
2392 | } |
2393 | } | |
2394 | ||
2395 | ||
2396 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2397 | window-based redisplay. */ | |
2398 | ||
2399 | static void | |
2400 | adjust_frame_glyphs_for_window_redisplay (f) | |
2401 | struct frame *f; | |
2402 | { | |
5f5c8ee5 GM |
2403 | struct window *w; |
2404 | ||
2405 | xassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); | |
177c0ea7 | 2406 | |
5f5c8ee5 | 2407 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2408 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2409 | |
8ce2650d | 2410 | #ifdef HAVE_X_WINDOWS |
5f5c8ee5 GM |
2411 | /* Allocate/ reallocate matrices of the dummy window used to display |
2412 | the menu bar under X when no X toolkit support is available. */ | |
488dd4c4 | 2413 | #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2414 | { |
2415 | /* Allocate a dummy window if not already done. */ | |
2416 | if (NILP (f->menu_bar_window)) | |
2417 | { | |
2418 | f->menu_bar_window = make_window (); | |
2419 | w = XWINDOW (f->menu_bar_window); | |
2420 | XSETFRAME (w->frame, f); | |
2421 | w->pseudo_window_p = 1; | |
2422 | } | |
2423 | else | |
2424 | w = XWINDOW (f->menu_bar_window); | |
2425 | ||
2426 | /* Set window dimensions to frame dimensions and allocate or | |
2427 | adjust glyph matrices of W. */ | |
7df02016 KS |
2428 | XSETFASTINT (w->top_line, 0); |
2429 | XSETFASTINT (w->left_col, 0); | |
2430 | XSETFASTINT (w->total_lines, FRAME_MENU_BAR_LINES (f)); | |
2431 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
5d3cc43c | 2432 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2433 | } |
57714a86 YM |
2434 | #endif /* not USE_X_TOOLKIT && not USE_GTK */ |
2435 | #endif /* HAVE_X_WINDOWS */ | |
5f5c8ee5 | 2436 | |
488dd4c4 | 2437 | #ifndef USE_GTK |
9ea173e8 GM |
2438 | /* Allocate/ reallocate matrices of the tool bar window. If we |
2439 | don't have a tool bar window yet, make one. */ | |
2440 | if (NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2441 | { |
9ea173e8 GM |
2442 | f->tool_bar_window = make_window (); |
2443 | w = XWINDOW (f->tool_bar_window); | |
5f5c8ee5 GM |
2444 | XSETFRAME (w->frame, f); |
2445 | w->pseudo_window_p = 1; | |
2446 | } | |
2447 | else | |
9ea173e8 | 2448 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2449 | |
7df02016 KS |
2450 | XSETFASTINT (w->top_line, FRAME_MENU_BAR_LINES (f)); |
2451 | XSETFASTINT (w->left_col, 0); | |
2452 | XSETFASTINT (w->total_lines, FRAME_TOOL_BAR_LINES (f)); | |
2453 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
5d3cc43c | 2454 | allocate_matrices_for_window_redisplay (w); |
488dd4c4 | 2455 | #endif |
5f5c8ee5 GM |
2456 | } |
2457 | ||
2458 | ||
177c0ea7 | 2459 | /* Adjust/ allocate message buffer of frame F. |
5f5c8ee5 | 2460 | |
5f5c8ee5 GM |
2461 | Note that the message buffer is never freed. Since I could not |
2462 | find a free in 19.34, I assume that freeing it would be | |
2463 | problematic in some way and don't do it either. | |
2464 | ||
2465 | (Implementation note: It should be checked if we can free it | |
2466 | eventually without causing trouble). */ | |
2467 | ||
2468 | static void | |
2469 | adjust_frame_message_buffer (f) | |
2470 | struct frame *f; | |
2471 | { | |
2472 | int size = FRAME_MESSAGE_BUF_SIZE (f) + 1; | |
2473 | ||
2474 | if (FRAME_MESSAGE_BUF (f)) | |
2475 | { | |
2476 | char *buffer = FRAME_MESSAGE_BUF (f); | |
2477 | char *new_buffer = (char *) xrealloc (buffer, size); | |
5f5c8ee5 GM |
2478 | FRAME_MESSAGE_BUF (f) = new_buffer; |
2479 | } | |
2480 | else | |
2481 | FRAME_MESSAGE_BUF (f) = (char *) xmalloc (size); | |
2482 | } | |
2483 | ||
2484 | ||
2485 | /* Re-allocate buffer for decode_mode_spec on frame F. */ | |
2486 | ||
2487 | static void | |
2488 | adjust_decode_mode_spec_buffer (f) | |
2489 | struct frame *f; | |
2490 | { | |
2491 | f->decode_mode_spec_buffer | |
2492 | = (char *) xrealloc (f->decode_mode_spec_buffer, | |
2493 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
2494 | } | |
2495 | ||
2496 | ||
2497 | \f | |
2498 | /********************************************************************** | |
2499 | Freeing Glyph Matrices | |
2500 | **********************************************************************/ | |
2501 | ||
2502 | /* Free glyph memory for a frame F. F may be null. This function can | |
2503 | be called for the same frame more than once. The root window of | |
2504 | F may be nil when this function is called. This is the case when | |
2505 | the function is called when F is destroyed. */ | |
2506 | ||
2507 | void | |
2508 | free_glyphs (f) | |
2509 | struct frame *f; | |
2510 | { | |
2511 | if (f && f->glyphs_initialized_p) | |
2512 | { | |
42f55fe0 GM |
2513 | /* Block interrupt input so that we don't get surprised by an X |
2514 | event while we're in an inconsistent state. */ | |
2515 | BLOCK_INPUT; | |
5f5c8ee5 | 2516 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2517 | |
5f5c8ee5 GM |
2518 | /* Release window sub-matrices. */ |
2519 | if (!NILP (f->root_window)) | |
2520 | free_window_matrices (XWINDOW (f->root_window)); | |
2521 | ||
2522 | /* Free the dummy window for menu bars without X toolkit and its | |
2523 | glyph matrices. */ | |
2524 | if (!NILP (f->menu_bar_window)) | |
2525 | { | |
2526 | struct window *w = XWINDOW (f->menu_bar_window); | |
2527 | free_glyph_matrix (w->desired_matrix); | |
2528 | free_glyph_matrix (w->current_matrix); | |
2529 | w->desired_matrix = w->current_matrix = NULL; | |
2530 | f->menu_bar_window = Qnil; | |
2531 | } | |
2532 | ||
9ea173e8 GM |
2533 | /* Free the tool bar window and its glyph matrices. */ |
2534 | if (!NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2535 | { |
9ea173e8 | 2536 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2537 | free_glyph_matrix (w->desired_matrix); |
2538 | free_glyph_matrix (w->current_matrix); | |
2539 | w->desired_matrix = w->current_matrix = NULL; | |
9ea173e8 | 2540 | f->tool_bar_window = Qnil; |
5f5c8ee5 GM |
2541 | } |
2542 | ||
2543 | /* Release frame glyph matrices. Reset fields to zero in | |
2544 | case we are called a second time. */ | |
2545 | if (f->desired_matrix) | |
2546 | { | |
2547 | free_glyph_matrix (f->desired_matrix); | |
2548 | free_glyph_matrix (f->current_matrix); | |
2549 | f->desired_matrix = f->current_matrix = NULL; | |
2550 | } | |
2551 | ||
2552 | /* Release glyph pools. */ | |
2553 | if (f->desired_pool) | |
2554 | { | |
2555 | free_glyph_pool (f->desired_pool); | |
2556 | free_glyph_pool (f->current_pool); | |
2557 | f->desired_pool = f->current_pool = NULL; | |
2558 | } | |
177c0ea7 | 2559 | |
42f55fe0 | 2560 | UNBLOCK_INPUT; |
5f5c8ee5 GM |
2561 | } |
2562 | } | |
2563 | ||
2564 | ||
2565 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2566 | function may be called with a null pointer, and it may be called on | |
2567 | the same tree more than once. */ | |
2568 | ||
2569 | void | |
2570 | free_window_matrices (w) | |
2571 | struct window *w; | |
2572 | { | |
2573 | while (w) | |
2574 | { | |
2575 | if (!NILP (w->hchild)) | |
2576 | free_window_matrices (XWINDOW (w->hchild)); | |
2577 | else if (!NILP (w->vchild)) | |
2578 | free_window_matrices (XWINDOW (w->vchild)); | |
177c0ea7 | 2579 | else |
5f5c8ee5 GM |
2580 | { |
2581 | /* This is a leaf window. Free its memory and reset fields | |
2582 | to zero in case this function is called a second time for | |
2583 | W. */ | |
2584 | free_glyph_matrix (w->current_matrix); | |
2585 | free_glyph_matrix (w->desired_matrix); | |
2586 | w->current_matrix = w->desired_matrix = NULL; | |
2587 | } | |
2588 | ||
2589 | /* Next window on same level. */ | |
2590 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2591 | } | |
2592 | } | |
2593 | ||
2594 | ||
2595 | /* Check glyph memory leaks. This function is called from | |
2596 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2597 | exits. We therefore free all glyph memory for all active frames | |
2598 | explicitly and check that nothing is left allocated. */ | |
2599 | ||
2600 | void | |
2601 | check_glyph_memory () | |
2602 | { | |
2603 | Lisp_Object tail, frame; | |
2604 | ||
2605 | /* Free glyph memory for all frames. */ | |
2606 | FOR_EACH_FRAME (tail, frame) | |
2607 | free_glyphs (XFRAME (frame)); | |
2608 | ||
2609 | /* Check that nothing is left allocated. */ | |
2610 | if (glyph_matrix_count) | |
2611 | abort (); | |
2612 | if (glyph_pool_count) | |
2613 | abort (); | |
2614 | } | |
2615 | ||
2616 | ||
2617 | \f | |
2618 | /********************************************************************** | |
2619 | Building a Frame Matrix | |
2620 | **********************************************************************/ | |
2621 | ||
2622 | /* Most of the redisplay code works on glyph matrices attached to | |
2623 | windows. This is a good solution most of the time, but it is not | |
2624 | suitable for terminal code. Terminal output functions cannot rely | |
2625 | on being able to set an arbitrary terminal window. Instead they | |
2626 | must be provided with a view of the whole frame, i.e. the whole | |
2627 | screen. We build such a view by constructing a frame matrix from | |
2628 | window matrices in this section. | |
2629 | ||
2630 | Windows that must be updated have their must_be_update_p flag set. | |
2631 | For all such windows, their desired matrix is made part of the | |
2632 | desired frame matrix. For other windows, their current matrix is | |
2633 | made part of the desired frame matrix. | |
2634 | ||
2635 | +-----------------+----------------+ | |
2636 | | desired | desired | | |
2637 | | | | | |
2638 | +-----------------+----------------+ | |
2639 | | current | | |
2640 | | | | |
2641 | +----------------------------------+ | |
2642 | ||
2643 | Desired window matrices can be made part of the frame matrix in a | |
2644 | cheap way: We exploit the fact that the desired frame matrix and | |
2645 | desired window matrices share their glyph memory. This is not | |
2646 | possible for current window matrices. Their glyphs are copied to | |
2647 | the desired frame matrix. The latter is equivalent to | |
2648 | preserve_other_columns in the old redisplay. | |
2649 | ||
2650 | Used glyphs counters for frame matrix rows are the result of adding | |
2651 | up glyph lengths of the window matrices. A line in the frame | |
2652 | matrix is enabled, if a corresponding line in a window matrix is | |
2653 | enabled. | |
177c0ea7 | 2654 | |
5f5c8ee5 GM |
2655 | After building the desired frame matrix, it will be passed to |
2656 | terminal code, which will manipulate both the desired and current | |
2657 | frame matrix. Changes applied to the frame's current matrix have | |
2658 | to be visible in current window matrices afterwards, of course. | |
2659 | ||
2660 | This problem is solved like this: | |
2661 | ||
2662 | 1. Window and frame matrices share glyphs. Window matrices are | |
2663 | constructed in a way that their glyph contents ARE the glyph | |
2664 | contents needed in a frame matrix. Thus, any modification of | |
2665 | glyphs done in terminal code will be reflected in window matrices | |
2666 | automatically. | |
177c0ea7 | 2667 | |
5f5c8ee5 GM |
2668 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2669 | intercepted by hook functions so that corresponding row operations | |
2670 | on window matrices can be performed. This is necessary because we | |
2671 | use pointers to glyphs in glyph row structures. To satisfy the | |
2672 | assumption of point 1 above that glyphs are updated implicitly in | |
2673 | window matrices when they are manipulated via the frame matrix, | |
2674 | window and frame matrix must of course agree where to find the | |
2675 | glyphs for their rows. Possible manipulations that must be | |
2676 | mirrored are assignments of rows of the desired frame matrix to the | |
2677 | current frame matrix and scrolling the current frame matrix. */ | |
2678 | ||
2679 | /* Build frame F's desired matrix from window matrices. Only windows | |
2680 | which have the flag must_be_updated_p set have to be updated. Menu | |
2681 | bar lines of a frame are not covered by window matrices, so make | |
2682 | sure not to touch them in this function. */ | |
2683 | ||
2684 | static void | |
2685 | build_frame_matrix (f) | |
2686 | struct frame *f; | |
2687 | { | |
2688 | int i; | |
2689 | ||
2690 | /* F must have a frame matrix when this function is called. */ | |
2691 | xassert (!FRAME_WINDOW_P (f)); | |
177c0ea7 | 2692 | |
5f5c8ee5 GM |
2693 | /* Clear all rows in the frame matrix covered by window matrices. |
2694 | Menu bar lines are not covered by windows. */ | |
2695 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2696 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2697 | ||
2698 | /* Build the matrix by walking the window tree. */ | |
2699 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2700 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2701 | } | |
2702 | ||
2703 | ||
2704 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2705 | matrices. W is the root of a window tree. */ | |
2706 | ||
2707 | static void | |
2708 | build_frame_matrix_from_window_tree (matrix, w) | |
2709 | struct glyph_matrix *matrix; | |
2710 | struct window *w; | |
2711 | { | |
2712 | while (w) | |
2713 | { | |
2714 | if (!NILP (w->hchild)) | |
2715 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->hchild)); | |
2716 | else if (!NILP (w->vchild)) | |
2717 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->vchild)); | |
2718 | else | |
2719 | build_frame_matrix_from_leaf_window (matrix, w); | |
2720 | ||
2721 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2722 | } | |
2723 | } | |
2724 | ||
2725 | ||
2726 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2727 | desired frame matrix built. W is a leaf window whose desired or | |
2728 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2729 | must_be_updated_p determines which matrix it contributes to | |
2730 | FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix | |
2731 | is added to FRAME_MATRIX, otherwise W's current matrix is added. | |
2732 | Adding a desired matrix means setting up used counters and such in | |
2733 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2734 | means copying glyphs. The latter case corresponds to | |
2735 | preserve_other_columns in the old redisplay. */ | |
2736 | ||
2737 | static void | |
2738 | build_frame_matrix_from_leaf_window (frame_matrix, w) | |
2739 | struct glyph_matrix *frame_matrix; | |
2740 | struct window *w; | |
2741 | { | |
2742 | struct glyph_matrix *window_matrix; | |
2743 | int window_y, frame_y; | |
2744 | /* If non-zero, a glyph to insert at the right border of W. */ | |
3fc809e2 KS |
2745 | GLYPH right_border_glyph; |
2746 | ||
2747 | SET_GLYPH_FROM_CHAR (right_border_glyph, 0); | |
5f5c8ee5 GM |
2748 | |
2749 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2750 | if (w->must_be_updated_p) | |
2751 | { | |
2752 | window_matrix = w->desired_matrix; | |
2753 | ||
2754 | /* Decide whether we want to add a vertical border glyph. */ | |
2755 | if (!WINDOW_RIGHTMOST_P (w)) | |
2756 | { | |
2757 | struct Lisp_Char_Table *dp = window_display_table (w); | |
3fc809e2 | 2758 | Lisp_Object gc; |
b4e49aee | 2759 | |
3fc809e2 KS |
2760 | SET_GLYPH_FROM_CHAR (right_border_glyph, '|'); |
2761 | if (dp | |
2762 | && (gc = DISP_BORDER_GLYPH (dp), GLYPH_CODE_P (gc)) | |
2763 | && GLYPH_CODE_CHAR_VALID_P (gc)) | |
2764 | { | |
2765 | SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph, gc); | |
2766 | spec_glyph_lookup_face (w, &right_border_glyph); | |
2767 | } | |
b4e49aee | 2768 | |
3fc809e2 KS |
2769 | if (GLYPH_FACE (right_border_glyph) <= 0) |
2770 | SET_GLYPH_FACE (right_border_glyph, VERTICAL_BORDER_FACE_ID); | |
5f5c8ee5 GM |
2771 | } |
2772 | } | |
2773 | else | |
2774 | window_matrix = w->current_matrix; | |
2775 | ||
2776 | /* For all rows in the window matrix and corresponding rows in the | |
2777 | frame matrix. */ | |
2778 | window_y = 0; | |
2779 | frame_y = window_matrix->matrix_y; | |
2780 | while (window_y < window_matrix->nrows) | |
2781 | { | |
2782 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2783 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
2a8bd25f | 2784 | int current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2785 | |
2786 | /* Fill up the frame row with spaces up to the left margin of the | |
2787 | window row. */ | |
2788 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2789 | ||
2790 | /* Fill up areas in the window matrix row with spaces. */ | |
2791 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2792 | |
2793 | /* If only part of W's desired matrix has been built, and | |
2794 | window_row wasn't displayed, use the corresponding current | |
2795 | row instead. */ | |
2796 | if (window_matrix == w->desired_matrix | |
2797 | && !window_row->enabled_p) | |
2798 | { | |
2799 | window_row = w->current_matrix->rows + window_y; | |
2800 | current_row_p = 1; | |
2801 | } | |
177c0ea7 | 2802 | |
2a8bd25f | 2803 | if (current_row_p) |
5f5c8ee5 | 2804 | { |
2a8bd25f | 2805 | /* Copy window row to frame row. */ |
5f5c8ee5 GM |
2806 | bcopy (window_row->glyphs[0], |
2807 | frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, | |
2808 | window_matrix->matrix_w * sizeof (struct glyph)); | |
2809 | } | |
2810 | else | |
2811 | { | |
2a8bd25f | 2812 | xassert (window_row->enabled_p); |
177c0ea7 | 2813 | |
2a8bd25f GM |
2814 | /* Only when a desired row has been displayed, we want |
2815 | the corresponding frame row to be updated. */ | |
2816 | frame_row->enabled_p = 1; | |
177c0ea7 | 2817 | |
5f5c8ee5 GM |
2818 | /* Maybe insert a vertical border between horizontally adjacent |
2819 | windows. */ | |
3fc809e2 | 2820 | if (GLYPH_CHAR (right_border_glyph) != 0) |
5f5c8ee5 GM |
2821 | { |
2822 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2823 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2824 | } | |
2825 | ||
498c08ea | 2826 | #if GLYPH_DEBUG |
a13396c9 GM |
2827 | /* Window row window_y must be a slice of frame row |
2828 | frame_y. */ | |
5f5c8ee5 | 2829 | xassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2830 | |
5f5c8ee5 GM |
2831 | /* If rows are in sync, we don't have to copy glyphs because |
2832 | frame and window share glyphs. */ | |
177c0ea7 | 2833 | |
a38634ff | 2834 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2835 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2836 | #endif |
5f5c8ee5 GM |
2837 | } |
2838 | ||
2839 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2840 | up with spaces, and visit leaf windows from left to right it | |
2841 | can be done simply. */ | |
177c0ea7 | 2842 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2843 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2844 | ||
5f5c8ee5 GM |
2845 | /* Next row. */ |
2846 | ++window_y; | |
2847 | ++frame_y; | |
2848 | } | |
2849 | } | |
2850 | ||
5f81871e RS |
2851 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2852 | ID, return a glyph that has a realized face ID. | |
2853 | This is used for glyphs displayed specially and not part of the text; | |
2854 | for instance, vertical separators, truncation markers, etc. */ | |
2855 | ||
3fc809e2 | 2856 | void |
5f81871e RS |
2857 | spec_glyph_lookup_face (w, glyph) |
2858 | struct window *w; | |
3fc809e2 | 2859 | GLYPH *glyph; |
5f81871e | 2860 | { |
3fc809e2 | 2861 | int lface_id = GLYPH_FACE (*glyph); |
5f81871e RS |
2862 | /* Convert the glyph's specified face to a realized (cache) face. */ |
2863 | if (lface_id > 0) | |
2864 | { | |
2865 | int face_id = merge_faces (XFRAME (w->frame), | |
2866 | Qt, lface_id, DEFAULT_FACE_ID); | |
3fc809e2 | 2867 | SET_GLYPH_FACE (*glyph, face_id); |
5f81871e | 2868 | } |
5f81871e | 2869 | } |
5f5c8ee5 GM |
2870 | |
2871 | /* Add spaces to a glyph row ROW in a window matrix. | |
2872 | ||
2873 | Each row has the form: | |
2874 | ||
2875 | +---------+-----------------------------+------------+ | |
2876 | | left | text | right | | |
2877 | +---------+-----------------------------+------------+ | |
2878 | ||
2879 | Left and right marginal areas are optional. This function adds | |
2880 | spaces to areas so that there are no empty holes between areas. | |
2881 | In other words: If the right area is not empty, the text area | |
2882 | is filled up with spaces up to the right area. If the text area | |
2883 | is not empty, the left area is filled up. | |
2884 | ||
2885 | To be called for frame-based redisplay, only. */ | |
2886 | ||
2887 | static void | |
2888 | fill_up_glyph_row_with_spaces (row) | |
2889 | struct glyph_row *row; | |
2890 | { | |
2891 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2892 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2893 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2894 | } | |
2895 | ||
2896 | ||
2897 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2898 | frame-based redisplay only. */ | |
2899 | ||
2900 | static void | |
2901 | fill_up_glyph_row_area_with_spaces (row, area) | |
2902 | struct glyph_row *row; | |
2903 | int area; | |
2904 | { | |
2905 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2906 | { | |
2907 | struct glyph *end = row->glyphs[area + 1]; | |
2908 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2909 | ||
2910 | while (text < end) | |
2911 | *text++ = space_glyph; | |
2912 | row->used[area] = text - row->glyphs[area]; | |
2913 | } | |
2914 | } | |
2915 | ||
2916 | ||
2917 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2918 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2919 | ||
2920 | static void | |
2921 | fill_up_frame_row_with_spaces (row, upto) | |
2922 | struct glyph_row *row; | |
2923 | int upto; | |
2924 | { | |
2925 | int i = row->used[TEXT_AREA]; | |
2926 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2927 | |
5f5c8ee5 GM |
2928 | while (i < upto) |
2929 | glyph[i++] = space_glyph; | |
2930 | ||
2931 | row->used[TEXT_AREA] = i; | |
2932 | } | |
2933 | ||
2934 | ||
2935 | \f | |
2936 | /********************************************************************** | |
2937 | Mirroring operations on frame matrices in window matrices | |
2938 | **********************************************************************/ | |
2939 | ||
2940 | /* Set frame being updated via frame-based redisplay to F. This | |
2941 | function must be called before updates to make explicit that we are | |
2942 | working on frame matrices or not. */ | |
2943 | ||
2944 | static INLINE void | |
2945 | set_frame_matrix_frame (f) | |
2946 | struct frame *f; | |
2947 | { | |
2948 | frame_matrix_frame = f; | |
2949 | } | |
2950 | ||
2951 | ||
2952 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2953 | DESIRED_MATRIX is the desired matrix corresponding to | |
2954 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2955 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2956 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2957 | done in frame matrices, and that we have to perform analogous | |
2958 | operations in window matrices of frame_matrix_frame. */ | |
2959 | ||
2960 | static INLINE void | |
2961 | make_current (desired_matrix, current_matrix, row) | |
2962 | struct glyph_matrix *desired_matrix, *current_matrix; | |
2963 | int row; | |
2964 | { | |
2965 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2966 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
e876ff42 | 2967 | int mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2968 | |
2969 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2970 | between both rows, and does a structure assignment otherwise. */ | |
2971 | assign_row (current_row, desired_row); | |
2972 | ||
2973 | /* Enable current_row to mark it as valid. */ | |
2974 | current_row->enabled_p = 1; | |
e876ff42 | 2975 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2976 | |
2977 | /* If we are called on frame matrices, perform analogous operations | |
2978 | for window matrices. */ | |
2979 | if (frame_matrix_frame) | |
2980 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); | |
2981 | } | |
2982 | ||
2983 | ||
2984 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2985 | W's frame which has been made current (by swapping pointers between | |
2986 | current and desired matrix). Perform analogous operations in the | |
2987 | matrices of leaf windows in the window tree rooted at W. */ | |
2988 | ||
2989 | static void | |
2990 | mirror_make_current (w, frame_row) | |
2991 | struct window *w; | |
2992 | int frame_row; | |
2993 | { | |
2994 | while (w) | |
2995 | { | |
2996 | if (!NILP (w->hchild)) | |
2997 | mirror_make_current (XWINDOW (w->hchild), frame_row); | |
2998 | else if (!NILP (w->vchild)) | |
2999 | mirror_make_current (XWINDOW (w->vchild), frame_row); | |
3000 | else | |
3001 | { | |
3002 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
3003 | here because the checks performed in debug mode there | |
3004 | will not allow the conversion. */ | |
3005 | int row = frame_row - w->desired_matrix->matrix_y; | |
3006 | ||
3007 | /* If FRAME_ROW is within W, assign the desired row to the | |
3008 | current row (exchanging glyph pointers). */ | |
3009 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
3010 | { | |
3011 | struct glyph_row *current_row | |
3012 | = MATRIX_ROW (w->current_matrix, row); | |
3013 | struct glyph_row *desired_row | |
3014 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
3015 | |
3016 | if (desired_row->enabled_p) | |
3017 | assign_row (current_row, desired_row); | |
3018 | else | |
3019 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 GM |
3020 | current_row->enabled_p = 1; |
3021 | } | |
3022 | } | |
177c0ea7 | 3023 | |
5f5c8ee5 GM |
3024 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3025 | } | |
3026 | } | |
3027 | ||
3028 | ||
3029 | /* Perform row dance after scrolling. We are working on the range of | |
3030 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
3031 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
3032 | row I in the range 0 <= I < NLINES, the index of the original line | |
3033 | to move to I. This index is relative to the row range, i.e. 0 <= | |
3034 | index < NLINES. RETAINED_P is a vector containing zero for each | |
3035 | row 0 <= I < NLINES which is empty. | |
3036 | ||
3037 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 3038 | |
5f5c8ee5 GM |
3039 | void |
3040 | mirrored_line_dance (matrix, unchanged_at_top, nlines, copy_from, | |
3041 | retained_p) | |
3042 | struct glyph_matrix *matrix; | |
3043 | int unchanged_at_top, nlines; | |
3044 | int *copy_from; | |
3045 | char *retained_p; | |
3046 | { | |
3047 | /* A copy of original rows. */ | |
3048 | struct glyph_row *old_rows; | |
3049 | ||
3050 | /* Rows to assign to. */ | |
3051 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 3052 | |
5f5c8ee5 GM |
3053 | int i; |
3054 | ||
3055 | /* Make a copy of the original rows. */ | |
3056 | old_rows = (struct glyph_row *) alloca (nlines * sizeof *old_rows); | |
3057 | bcopy (new_rows, old_rows, nlines * sizeof *old_rows); | |
3058 | ||
3059 | /* Assign new rows, maybe clear lines. */ | |
3060 | for (i = 0; i < nlines; ++i) | |
3061 | { | |
3062 | int enabled_before_p = new_rows[i].enabled_p; | |
3063 | ||
3064 | xassert (i + unchanged_at_top < matrix->nrows); | |
3065 | xassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
3066 | new_rows[i] = old_rows[copy_from[i]]; | |
3067 | new_rows[i].enabled_p = enabled_before_p; | |
3068 | ||
3069 | /* RETAINED_P is zero for empty lines. */ | |
3070 | if (!retained_p[copy_from[i]]) | |
3071 | new_rows[i].enabled_p = 0; | |
3072 | } | |
3073 | ||
153a073c | 3074 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 GM |
3075 | if (frame_matrix_frame) |
3076 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), | |
3077 | unchanged_at_top, nlines, copy_from, retained_p); | |
3078 | } | |
3079 | ||
3080 | ||
a13396c9 | 3081 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 3082 | the current frame matrix. */ |
a13396c9 GM |
3083 | |
3084 | static void | |
3085 | sync_window_with_frame_matrix_rows (w) | |
3086 | struct window *w; | |
3087 | { | |
3088 | struct frame *f = XFRAME (w->frame); | |
3089 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
075c507b | 3090 | int left, right, x, width; |
a13396c9 | 3091 | |
5cb88111 | 3092 | /* Preconditions: W must be a leaf window on a tty frame. */ |
a13396c9 | 3093 | xassert (NILP (w->hchild) && NILP (w->vchild)); |
a13396c9 GM |
3094 | xassert (!FRAME_WINDOW_P (f)); |
3095 | ||
7df02016 KS |
3096 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
3097 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
3098 | x = w->current_matrix->matrix_x; |
3099 | width = w->current_matrix->matrix_w; | |
3100 | ||
a13396c9 GM |
3101 | window_row = w->current_matrix->rows; |
3102 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 3103 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 3104 | |
5cb88111 | 3105 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 3106 | { |
5cb88111 GM |
3107 | window_row->glyphs[LEFT_MARGIN_AREA] |
3108 | = frame_row->glyphs[0] + x; | |
3109 | window_row->glyphs[TEXT_AREA] | |
3110 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
3111 | window_row->glyphs[LAST_AREA] | |
3112 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
3113 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
3114 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
3115 | } |
3116 | } | |
3117 | ||
3118 | ||
3119 | /* Return the window in the window tree rooted in W containing frame | |
3120 | row ROW. Value is null if none is found. */ | |
3121 | ||
3122 | struct window * | |
3123 | frame_row_to_window (w, row) | |
3124 | struct window *w; | |
3125 | int row; | |
3126 | { | |
3127 | struct window *found = NULL; | |
177c0ea7 | 3128 | |
a13396c9 GM |
3129 | while (w && !found) |
3130 | { | |
3131 | if (!NILP (w->hchild)) | |
3132 | found = frame_row_to_window (XWINDOW (w->hchild), row); | |
3133 | else if (!NILP (w->vchild)) | |
3134 | found = frame_row_to_window (XWINDOW (w->vchild), row); | |
7df02016 KS |
3135 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
3136 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 3137 | found = w; |
177c0ea7 | 3138 | |
a13396c9 GM |
3139 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3140 | } | |
3141 | ||
3142 | return found; | |
3143 | } | |
3144 | ||
3145 | ||
5f5c8ee5 GM |
3146 | /* Perform a line dance in the window tree rooted at W, after |
3147 | scrolling a frame matrix in mirrored_line_dance. | |
3148 | ||
3149 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
3150 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
3151 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
3152 | I < NLINES, the index of the original line to move to I. This | |
3153 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
3154 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
3155 | which is empty. */ | |
3156 | ||
3157 | static void | |
3158 | mirror_line_dance (w, unchanged_at_top, nlines, copy_from, retained_p) | |
3159 | struct window *w; | |
3160 | int unchanged_at_top, nlines; | |
3161 | int *copy_from; | |
3162 | char *retained_p; | |
3163 | { | |
3164 | while (w) | |
3165 | { | |
3166 | if (!NILP (w->hchild)) | |
3167 | mirror_line_dance (XWINDOW (w->hchild), unchanged_at_top, | |
3168 | nlines, copy_from, retained_p); | |
3169 | else if (!NILP (w->vchild)) | |
3170 | mirror_line_dance (XWINDOW (w->vchild), unchanged_at_top, | |
3171 | nlines, copy_from, retained_p); | |
3172 | else | |
3173 | { | |
3174 | /* W is a leaf window, and we are working on its current | |
3175 | matrix m. */ | |
3176 | struct glyph_matrix *m = w->current_matrix; | |
a13396c9 | 3177 | int i, sync_p = 0; |
5f5c8ee5 GM |
3178 | struct glyph_row *old_rows; |
3179 | ||
3180 | /* Make a copy of the original rows of matrix m. */ | |
3181 | old_rows = (struct glyph_row *) alloca (m->nrows * sizeof *old_rows); | |
3182 | bcopy (m->rows, old_rows, m->nrows * sizeof *old_rows); | |
3183 | ||
3184 | for (i = 0; i < nlines; ++i) | |
3185 | { | |
3186 | /* Frame relative line assigned to. */ | |
3187 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 3188 | |
5f5c8ee5 GM |
3189 | /* Frame relative line assigned. */ |
3190 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 3191 | |
5f5c8ee5 GM |
3192 | /* Window relative line assigned to. */ |
3193 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 3194 | |
5f5c8ee5 GM |
3195 | /* Window relative line assigned. */ |
3196 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 3197 | |
5f5c8ee5 GM |
3198 | /* Is assigned line inside window? */ |
3199 | int from_inside_window_p | |
3200 | = window_from >= 0 && window_from < m->matrix_h; | |
177c0ea7 | 3201 | |
a13396c9 GM |
3202 | /* Is assigned to line inside window? */ |
3203 | int to_inside_window_p | |
3204 | = window_to >= 0 && window_to < m->matrix_h; | |
177c0ea7 | 3205 | |
a13396c9 | 3206 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 3207 | { |
5f5c8ee5 GM |
3208 | /* Enabled setting before assignment. */ |
3209 | int enabled_before_p; | |
177c0ea7 | 3210 | |
5f5c8ee5 GM |
3211 | /* Do the assignment. The enabled_p flag is saved |
3212 | over the assignment because the old redisplay did | |
3213 | that. */ | |
3214 | enabled_before_p = m->rows[window_to].enabled_p; | |
3215 | m->rows[window_to] = old_rows[window_from]; | |
3216 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 3217 | |
5f5c8ee5 GM |
3218 | /* If frame line is empty, window line is empty, too. */ |
3219 | if (!retained_p[copy_from[i]]) | |
3220 | m->rows[window_to].enabled_p = 0; | |
3221 | } | |
a13396c9 GM |
3222 | else if (to_inside_window_p) |
3223 | { | |
3224 | /* A copy between windows. This is an infrequent | |
3225 | case not worth optimizing. */ | |
3226 | struct frame *f = XFRAME (w->frame); | |
3227 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); | |
3228 | struct window *w2; | |
3229 | struct glyph_matrix *m2; | |
3230 | int m2_from; | |
3231 | ||
fe8b8401 | 3232 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
3233 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
3234 | -nw', FROM_FRAME sometimes has no associated window. | |
3235 | This check avoids a segfault if W2 is null. */ | |
3236 | if (w2) | |
3237 | { | |
3238 | m2 = w2->current_matrix; | |
3239 | m2_from = frame_from - m2->matrix_y; | |
3240 | copy_row_except_pointers (m->rows + window_to, | |
3241 | m2->rows + m2_from); | |
3242 | ||
3243 | /* If frame line is empty, window line is empty, too. */ | |
3244 | if (!retained_p[copy_from[i]]) | |
3245 | m->rows[window_to].enabled_p = 0; | |
3246 | } | |
a13396c9 GM |
3247 | sync_p = 1; |
3248 | } | |
3249 | else if (from_inside_window_p) | |
3250 | sync_p = 1; | |
5f5c8ee5 | 3251 | } |
a13396c9 GM |
3252 | |
3253 | /* If there was a copy between windows, make sure glyph | |
3254 | pointers are in sync with the frame matrix. */ | |
3255 | if (sync_p) | |
3256 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 3257 | |
5f5c8ee5 GM |
3258 | /* Check that no pointers are lost. */ |
3259 | CHECK_MATRIX (m); | |
3260 | } | |
3261 | ||
3262 | /* Next window on same level. */ | |
3263 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3264 | } | |
3265 | } | |
3266 | ||
3267 | ||
3268 | #if GLYPH_DEBUG | |
3269 | ||
3270 | /* Check that window and frame matrices agree about their | |
3271 | understanding where glyphs of the rows are to find. For each | |
3272 | window in the window tree rooted at W, check that rows in the | |
3273 | matrices of leaf window agree with their frame matrices about | |
3274 | glyph pointers. */ | |
3275 | ||
3276 | void | |
3277 | check_window_matrix_pointers (w) | |
3278 | struct window *w; | |
3279 | { | |
3280 | while (w) | |
3281 | { | |
3282 | if (!NILP (w->hchild)) | |
3283 | check_window_matrix_pointers (XWINDOW (w->hchild)); | |
3284 | else if (!NILP (w->vchild)) | |
3285 | check_window_matrix_pointers (XWINDOW (w->vchild)); | |
3286 | else | |
60a8948a | 3287 | { |
5f5c8ee5 GM |
3288 | struct frame *f = XFRAME (w->frame); |
3289 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); | |
3290 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 3291 | } |
177c0ea7 | 3292 | |
5f5c8ee5 GM |
3293 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3294 | } | |
3295 | } | |
3296 | ||
3297 | ||
3298 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
3299 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
3300 | each row in WINDOW_MATRIX check that it's a slice of the | |
3301 | corresponding frame row. If it isn't, abort. */ | |
3302 | ||
3303 | static void | |
3304 | check_matrix_pointers (window_matrix, frame_matrix) | |
3305 | struct glyph_matrix *window_matrix, *frame_matrix; | |
3306 | { | |
3307 | /* Row number in WINDOW_MATRIX. */ | |
3308 | int i = 0; | |
3309 | ||
3310 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
3311 | int j = window_matrix->matrix_y; | |
3312 | ||
177c0ea7 | 3313 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
3314 | slice of the row in the frame matrix. If it isn't we didn't |
3315 | mirror an operation on the frame matrix correctly. */ | |
3316 | while (i < window_matrix->nrows) | |
3317 | { | |
3318 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
3319 | frame_matrix->rows + j)) | |
3320 | abort (); | |
3321 | ++i, ++j; | |
3322 | } | |
3323 | } | |
3324 | ||
3325 | #endif /* GLYPH_DEBUG != 0 */ | |
3326 | ||
3327 | ||
3328 | \f | |
3329 | /********************************************************************** | |
3330 | VPOS and HPOS translations | |
3331 | **********************************************************************/ | |
3332 | ||
3333 | #if GLYPH_DEBUG | |
3334 | ||
3335 | /* Translate vertical position VPOS which is relative to window W to a | |
3336 | vertical position relative to W's frame. */ | |
3337 | ||
3338 | static int | |
3339 | window_to_frame_vpos (w, vpos) | |
3340 | struct window *w; | |
3341 | int vpos; | |
3342 | { | |
3343 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 3344 | |
5f5c8ee5 GM |
3345 | xassert (!FRAME_WINDOW_P (f)); |
3346 | xassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); | |
7df02016 KS |
3347 | vpos += WINDOW_TOP_EDGE_LINE (w); |
3348 | xassert (vpos >= 0 && vpos <= FRAME_LINES (f)); | |
5f5c8ee5 GM |
3349 | return vpos; |
3350 | } | |
3351 | ||
3352 | ||
3353 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 3354 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
3355 | |
3356 | static int | |
3357 | window_to_frame_hpos (w, hpos) | |
3358 | struct window *w; | |
3359 | int hpos; | |
3360 | { | |
82f4a138 | 3361 | xassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 3362 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
3363 | return hpos; |
3364 | } | |
177c0ea7 | 3365 | |
5f5c8ee5 GM |
3366 | #endif /* GLYPH_DEBUG */ |
3367 | ||
3368 | ||
3369 | \f | |
3370 | /********************************************************************** | |
3371 | Redrawing Frames | |
3372 | **********************************************************************/ | |
3373 | ||
3374 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, | |
7ee72033 MB |
3375 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. */) |
3376 | (frame) | |
5f5c8ee5 GM |
3377 | Lisp_Object frame; |
3378 | { | |
3379 | struct frame *f; | |
3380 | ||
b7826503 | 3381 | CHECK_LIVE_FRAME (frame); |
5f5c8ee5 GM |
3382 | f = XFRAME (frame); |
3383 | ||
3384 | /* Ignore redraw requests, if frame has no glyphs yet. | |
3385 | (Implementation note: It still has to be checked why we are | |
3386 | called so early here). */ | |
3387 | if (!glyphs_initialized_initially_p) | |
3388 | return Qnil; | |
3389 | ||
3390 | update_begin (f); | |
3224dac1 | 3391 | #ifdef MSDOS |
f2adda5e | 3392 | if (FRAME_MSDOS_P (f)) |
79d39b69 | 3393 | FRAME_TERMINAL (f)->set_terminal_modes_hook (FRAME_TERMINAL (f)); |
3224dac1 | 3394 | #endif |
385ed61f | 3395 | clear_frame (f); |
5f5c8ee5 GM |
3396 | clear_current_matrices (f); |
3397 | update_end (f); | |
daf01701 | 3398 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3399 | fflush (FRAME_TTY (f)->output); |
5f5c8ee5 GM |
3400 | windows_or_buffers_changed++; |
3401 | /* Mark all windows as inaccurate, so that every window will have | |
3402 | its redisplay done. */ | |
3403 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
3404 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
3405 | f->garbaged = 0; | |
3406 | return Qnil; | |
3407 | } | |
3408 | ||
3409 | ||
3410 | /* Redraw frame F. This is nothing more than a call to the Lisp | |
3411 | function redraw-frame. */ | |
3412 | ||
3413 | void | |
3414 | redraw_frame (f) | |
3415 | struct frame *f; | |
3416 | { | |
3417 | Lisp_Object frame; | |
3418 | XSETFRAME (frame, f); | |
3419 | Fredraw_frame (frame); | |
3420 | } | |
3421 | ||
3422 | ||
3423 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
7ee72033 MB |
3424 | doc: /* Clear and redisplay all visible frames. */) |
3425 | () | |
5f5c8ee5 GM |
3426 | { |
3427 | Lisp_Object tail, frame; | |
3428 | ||
3429 | FOR_EACH_FRAME (tail, frame) | |
3430 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
3431 | Fredraw_frame (frame); | |
3432 | ||
3433 | return Qnil; | |
3434 | } | |
3435 | ||
3436 | ||
3437 | /* This is used when frame_garbaged is set. Call Fredraw_frame on all | |
3438 | visible frames marked as garbaged. */ | |
3439 | ||
3440 | void | |
3441 | redraw_garbaged_frames () | |
3442 | { | |
3443 | Lisp_Object tail, frame; | |
3444 | ||
3445 | FOR_EACH_FRAME (tail, frame) | |
3446 | if (FRAME_VISIBLE_P (XFRAME (frame)) | |
3447 | && FRAME_GARBAGED_P (XFRAME (frame))) | |
3448 | Fredraw_frame (frame); | |
3449 | } | |
3450 | ||
3451 | ||
3452 | \f | |
3453 | /*********************************************************************** | |
3454 | Direct Operations | |
3455 | ***********************************************************************/ | |
3456 | ||
3457 | /* Try to update display and current glyph matrix directly. | |
3458 | ||
3459 | This function is called after a character G has been inserted into | |
3460 | current_buffer. It tries to update the current glyph matrix and | |
3461 | perform appropriate screen output to reflect the insertion. If it | |
3462 | succeeds, the global flag redisplay_performed_directly_p will be | |
3463 | set to 1, and thereby prevent the more costly general redisplay | |
3464 | from running (see redisplay_internal). | |
3465 | ||
3466 | This function is not called for `hairy' character insertions. | |
3467 | In particular, it is not called when after or before change | |
3468 | functions exist, like they are used by font-lock. See keyboard.c | |
3469 | for details where this function is called. */ | |
3470 | ||
3471 | int | |
3472 | direct_output_for_insert (g) | |
3473 | int g; | |
3474 | { | |
91fb7e1b | 3475 | register struct frame *f = SELECTED_FRAME (); |
5f5c8ee5 GM |
3476 | struct window *w = XWINDOW (selected_window); |
3477 | struct it it, it2; | |
3478 | struct glyph_row *glyph_row; | |
3479 | struct glyph *glyphs, *glyph, *end; | |
3480 | int n; | |
153a073c | 3481 | /* Non-null means that redisplay of W is based on window matrices. */ |
5f5c8ee5 GM |
3482 | int window_redisplay_p = FRAME_WINDOW_P (f); |
3483 | /* Non-null means we are in overwrite mode. */ | |
3484 | int overwrite_p = !NILP (current_buffer->overwrite_mode); | |
3485 | int added_width; | |
3486 | struct text_pos pos; | |
3487 | int delta, delta_bytes; | |
3488 | ||
3489 | /* Not done directly. */ | |
3490 | redisplay_performed_directly_p = 0; | |
3491 | ||
3492 | /* Quickly give up for some common cases. */ | |
3493 | if (cursor_in_echo_area | |
3494 | /* Give up if fonts have changed. */ | |
3495 | || fonts_changed_p | |
3496 | /* Give up if face attributes have been changed. */ | |
3497 | || face_change_count | |
3498 | /* Give up if cursor position not really known. */ | |
3499 | || !display_completed | |
3500 | /* Give up if buffer appears in two places. */ | |
3501 | || buffer_shared > 1 | |
c74e645b GM |
3502 | /* Give up if currently displaying a message instead of the |
3503 | minibuffer contents. */ | |
3504 | || (EQ (selected_window, minibuf_window) | |
3505 | && EQ (minibuf_window, echo_area_window)) | |
5f5c8ee5 GM |
3506 | /* Give up for hscrolled mini-buffer because display of the prompt |
3507 | is handled specially there (see display_line). */ | |
3508 | || (MINI_WINDOW_P (w) && XFASTINT (w->hscroll)) | |
3509 | /* Give up if overwriting in the middle of a line. */ | |
177c0ea7 JB |
3510 | || (overwrite_p |
3511 | && PT != ZV | |
5f5c8ee5 GM |
3512 | && FETCH_BYTE (PT) != '\n') |
3513 | /* Give up for tabs and line ends. */ | |
3514 | || g == '\t' | |
3515 | || g == '\n' | |
3516 | || g == '\r' | |
64d3f03b | 3517 | || (g == ' ' && !NILP (current_buffer->word_wrap)) |
5f5c8ee5 GM |
3518 | /* Give up if unable to display the cursor in the window. */ |
3519 | || w->cursor.vpos < 0 | |
c224f70b GM |
3520 | /* Give up if we are showing a message or just cleared the message |
3521 | because we might need to resize the echo area window. */ | |
3522 | || !NILP (echo_area_buffer[0]) | |
3523 | || !NILP (echo_area_buffer[1]) | |
408f5064 GM |
3524 | || (glyph_row = MATRIX_ROW (w->current_matrix, w->cursor.vpos), |
3525 | /* Can't do it in a continued line because continuation | |
3526 | lines would change. */ | |
3527 | (glyph_row->continued_p | |
6b61353c | 3528 | || glyph_row->exact_window_width_line_p |
408f5064 GM |
3529 | /* Can't use this method if the line overlaps others or is |
3530 | overlapped by others because these other lines would | |
3531 | have to be redisplayed. */ | |
3532 | || glyph_row->overlapping_p | |
3533 | || glyph_row->overlapped_p)) | |
5f5c8ee5 GM |
3534 | /* Can't do it for partial width windows on terminal frames |
3535 | because we can't clear to eol in such a window. */ | |
3536 | || (!window_redisplay_p && !WINDOW_FULL_WIDTH_P (w))) | |
3537 | return 0; | |
3538 | ||
f3ffc2c3 GM |
3539 | /* If we can't insert glyphs, we can use this method only |
3540 | at the end of a line. */ | |
daf01701 | 3541 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
f3ffc2c3 GM |
3542 | if (PT != ZV && FETCH_BYTE (PT_BYTE) != '\n') |
3543 | return 0; | |
3544 | ||
5f5c8ee5 GM |
3545 | /* Set up a display iterator structure for W. Glyphs will be |
3546 | produced in scratch_glyph_row. Current position is W's cursor | |
3547 | position. */ | |
3548 | clear_glyph_row (&scratch_glyph_row); | |
3549 | SET_TEXT_POS (pos, PT, PT_BYTE); | |
5f15d712 | 3550 | DEC_TEXT_POS (pos, !NILP (current_buffer->enable_multibyte_characters)); |
5f5c8ee5 GM |
3551 | init_iterator (&it, w, CHARPOS (pos), BYTEPOS (pos), &scratch_glyph_row, |
3552 | DEFAULT_FACE_ID); | |
3553 | ||
3554 | glyph_row = MATRIX_ROW (w->current_matrix, w->cursor.vpos); | |
e876ff42 GM |
3555 | if (glyph_row->mouse_face_p) |
3556 | return 0; | |
177c0ea7 | 3557 | |
5f5c8ee5 GM |
3558 | /* Give up if highlighting trailing whitespace and we have trailing |
3559 | whitespace in glyph_row. We would have to remove the trailing | |
3560 | whitespace face in that case. */ | |
f1f13490 | 3561 | if (!NILP (Vshow_trailing_whitespace) |
5f5c8ee5 GM |
3562 | && glyph_row->used[TEXT_AREA]) |
3563 | { | |
3564 | struct glyph *last; | |
3565 | ||
3566 | last = glyph_row->glyphs[TEXT_AREA] + glyph_row->used[TEXT_AREA] - 1; | |
3567 | if (last->type == STRETCH_GLYPH | |
3568 | || (last->type == CHAR_GLYPH | |
42186983 | 3569 | && last->u.ch == ' ')) |
5f5c8ee5 GM |
3570 | return 0; |
3571 | } | |
3572 | ||
3573 | /* Give up if there are overlay strings at pos. This would fail | |
3574 | if the overlay string has newlines in it. */ | |
3575 | if (STRINGP (it.string)) | |
3576 | return 0; | |
177c0ea7 | 3577 | |
5f5c8ee5 GM |
3578 | it.hpos = w->cursor.hpos; |
3579 | it.vpos = w->cursor.vpos; | |
3580 | it.current_x = w->cursor.x + it.first_visible_x; | |
3581 | it.current_y = w->cursor.y; | |
3582 | it.end_charpos = PT; | |
3583 | it.stop_charpos = min (PT, it.stop_charpos); | |
ae76d741 | 3584 | it.stop_charpos = max (IT_CHARPOS (it), it.stop_charpos); |
5f5c8ee5 GM |
3585 | |
3586 | /* More than one display element may be returned for PT - 1 if | |
3587 | (i) it's a control character which is translated into `\003' or | |
177c0ea7 | 3588 | `^C', or (ii) it has a display table entry, or (iii) it's a |
5f5c8ee5 GM |
3589 | combination of both. */ |
3590 | delta = delta_bytes = 0; | |
3591 | while (get_next_display_element (&it)) | |
3592 | { | |
3593 | PRODUCE_GLYPHS (&it); | |
3594 | ||
3595 | /* Give up if glyph doesn't fit completely on the line. */ | |
3596 | if (it.current_x >= it.last_visible_x) | |
3597 | return 0; | |
3598 | ||
3599 | /* Give up if new glyph has different ascent or descent than | |
3600 | the original row, or if it is not a character glyph. */ | |
3601 | if (glyph_row->ascent != it.ascent | |
3602 | || glyph_row->height != it.ascent + it.descent | |
408f5064 GM |
3603 | || glyph_row->phys_ascent != it.phys_ascent |
3604 | || glyph_row->phys_height != it.phys_ascent + it.phys_descent | |
5f5c8ee5 GM |
3605 | || it.what != IT_CHARACTER) |
3606 | return 0; | |
3607 | ||
3608 | delta += 1; | |
3609 | delta_bytes += it.len; | |
a2e2a7f6 | 3610 | set_iterator_to_next (&it, 1); |
5f5c8ee5 GM |
3611 | } |
3612 | ||
3613 | /* Give up if we hit the right edge of the window. We would have | |
3614 | to insert truncation or continuation glyphs. */ | |
3615 | added_width = it.current_x - (w->cursor.x + it.first_visible_x); | |
3616 | if (glyph_row->pixel_width + added_width >= it.last_visible_x) | |
3617 | return 0; | |
3618 | ||
3619 | /* Give up if there is a \t following in the line. */ | |
3620 | it2 = it; | |
3621 | it2.end_charpos = ZV; | |
3622 | it2.stop_charpos = min (it2.stop_charpos, ZV); | |
3623 | while (get_next_display_element (&it2) | |
3624 | && !ITERATOR_AT_END_OF_LINE_P (&it2)) | |
3625 | { | |
3626 | if (it2.c == '\t') | |
3627 | return 0; | |
a2e2a7f6 | 3628 | set_iterator_to_next (&it2, 1); |
5f5c8ee5 GM |
3629 | } |
3630 | ||
3631 | /* Number of new glyphs produced. */ | |
3632 | n = it.glyph_row->used[TEXT_AREA]; | |
3633 | ||
3634 | /* Start and end of glyphs in original row. */ | |
3635 | glyphs = glyph_row->glyphs[TEXT_AREA] + w->cursor.hpos; | |
3636 | end = glyph_row->glyphs[1 + TEXT_AREA]; | |
60a8948a | 3637 | |
5f5c8ee5 GM |
3638 | /* Make room for new glyphs, then insert them. */ |
3639 | xassert (end - glyphs - n >= 0); | |
700fb05a GM |
3640 | safe_bcopy ((char *) glyphs, (char *) (glyphs + n), |
3641 | (end - glyphs - n) * sizeof (*end)); | |
5f5c8ee5 GM |
3642 | bcopy (it.glyph_row->glyphs[TEXT_AREA], glyphs, n * sizeof *glyphs); |
3643 | glyph_row->used[TEXT_AREA] = min (glyph_row->used[TEXT_AREA] + n, | |
3644 | end - glyph_row->glyphs[TEXT_AREA]); | |
177c0ea7 | 3645 | |
5f5c8ee5 GM |
3646 | /* Compute new line width. */ |
3647 | glyph = glyph_row->glyphs[TEXT_AREA]; | |
3648 | end = glyph + glyph_row->used[TEXT_AREA]; | |
3649 | glyph_row->pixel_width = glyph_row->x; | |
3650 | while (glyph < end) | |
3651 | { | |
3652 | glyph_row->pixel_width += glyph->pixel_width; | |
3653 | ++glyph; | |
3654 | } | |
3655 | ||
177c0ea7 | 3656 | /* Increment buffer positions for glyphs following the newly |
5f5c8ee5 GM |
3657 | inserted ones. */ |
3658 | for (glyph = glyphs + n; glyph < end; ++glyph) | |
f2fa858f | 3659 | if (glyph->charpos > 0 && BUFFERP (glyph->object)) |
5f5c8ee5 | 3660 | glyph->charpos += delta; |
177c0ea7 | 3661 | |
5f5c8ee5 GM |
3662 | if (MATRIX_ROW_END_CHARPOS (glyph_row) > 0) |
3663 | { | |
3664 | MATRIX_ROW_END_CHARPOS (glyph_row) += delta; | |
3665 | MATRIX_ROW_END_BYTEPOS (glyph_row) += delta_bytes; | |
3666 | } | |
177c0ea7 | 3667 | |
5f5c8ee5 | 3668 | /* Adjust positions in lines following the one we are in. */ |
86c11ba1 GM |
3669 | increment_matrix_positions (w->current_matrix, |
3670 | w->cursor.vpos + 1, | |
3671 | w->current_matrix->nrows, | |
3672 | delta, delta_bytes); | |
5f5c8ee5 GM |
3673 | |
3674 | glyph_row->contains_overlapping_glyphs_p | |
3675 | |= it.glyph_row->contains_overlapping_glyphs_p; | |
3676 | ||
975c6226 GM |
3677 | glyph_row->displays_text_p = 1; |
3678 | w->window_end_vpos = make_number (max (w->cursor.vpos, | |
3679 | XFASTINT (w->window_end_vpos))); | |
3680 | ||
f1f13490 | 3681 | if (!NILP (Vshow_trailing_whitespace)) |
5f5c8ee5 GM |
3682 | highlight_trailing_whitespace (it.f, glyph_row); |
3683 | ||
3684 | /* Write glyphs. If at end of row, we can simply call write_glyphs. | |
3685 | In the middle, we have to insert glyphs. Note that this is now | |
3686 | implemented for X frames. The implementation uses updated_window | |
3687 | and updated_row. */ | |
3688 | updated_row = glyph_row; | |
9d126815 | 3689 | updated_area = TEXT_AREA; |
5f5c8ee5 | 3690 | update_begin (f); |
fa971ac3 | 3691 | if (FRAME_RIF (f)) |
5f5c8ee5 | 3692 | { |
fa971ac3 | 3693 | FRAME_RIF (f)->update_window_begin_hook (w); |
177c0ea7 | 3694 | |
7728f17b GM |
3695 | if (glyphs == end - n |
3696 | /* In front of a space added by append_space. */ | |
3697 | || (glyphs == end - n - 1 | |
3698 | && (end - n)->charpos <= 0)) | |
fa971ac3 | 3699 | FRAME_RIF (f)->write_glyphs (glyphs, n); |
5f5c8ee5 | 3700 | else |
fa971ac3 | 3701 | FRAME_RIF (f)->insert_glyphs (glyphs, n); |
5f5c8ee5 GM |
3702 | } |
3703 | else | |
3704 | { | |
3705 | if (glyphs == end - n) | |
385ed61f | 3706 | write_glyphs (f, glyphs, n); |
5f5c8ee5 | 3707 | else |
385ed61f | 3708 | insert_glyphs (f, glyphs, n); |
5f5c8ee5 | 3709 | } |
4588ec20 | 3710 | |
5f5c8ee5 GM |
3711 | w->cursor.hpos += n; |
3712 | w->cursor.x = it.current_x - it.first_visible_x; | |
3713 | xassert (w->cursor.hpos >= 0 | |
3714 | && w->cursor.hpos < w->desired_matrix->matrix_w); | |
3715 | ||
3716 | /* How to set the cursor differs depending on whether we are | |
3717 | using a frame matrix or a window matrix. Note that when | |
3718 | a frame matrix is used, cursor_to expects frame coordinates, | |
3719 | and the X and Y parameters are not used. */ | |
3720 | if (window_redisplay_p) | |
fa971ac3 KL |
3721 | FRAME_RIF (f)->cursor_to (w->cursor.vpos, w->cursor.hpos, |
3722 | w->cursor.y, w->cursor.x); | |
5f5c8ee5 GM |
3723 | else |
3724 | { | |
3725 | int x, y; | |
3726 | x = (WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos) | |
7df02016 KS |
3727 | + (INTEGERP (w->left_margin_cols) |
3728 | ? XFASTINT (w->left_margin_cols) | |
5f5c8ee5 GM |
3729 | : 0)); |
3730 | y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
385ed61f | 3731 | cursor_to (f, y, x); |
5f5c8ee5 | 3732 | } |
4588ec20 | 3733 | |
6b61353c KH |
3734 | #ifdef HAVE_WINDOW_SYSTEM |
3735 | update_window_fringes (w, 0); | |
3736 | #endif | |
3737 | ||
fa971ac3 KL |
3738 | if (FRAME_RIF (f)) |
3739 | FRAME_RIF (f)->update_window_end_hook (w, 1, 0); | |
5f5c8ee5 GM |
3740 | update_end (f); |
3741 | updated_row = NULL; | |
daf01701 | 3742 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3743 | fflush (FRAME_TTY (f)->output); |
4588ec20 | 3744 | |
5f5c8ee5 | 3745 | TRACE ((stderr, "direct output for insert\n")); |
fc5206ff | 3746 | mark_window_display_accurate (it.window, 1); |
5f5c8ee5 GM |
3747 | redisplay_performed_directly_p = 1; |
3748 | return 1; | |
3749 | } | |
448fd7c0 | 3750 | |
4588ec20 | 3751 | |
5f5c8ee5 GM |
3752 | /* Perform a direct display update for moving PT by N positions |
3753 | left or right. N < 0 means a movement backwards. This function | |
3754 | is currently only called for N == 1 or N == -1. */ | |
3755 | ||
3756 | int | |
3757 | direct_output_forward_char (n) | |
3758 | int n; | |
3759 | { | |
91fb7e1b | 3760 | struct frame *f = SELECTED_FRAME (); |
5f5c8ee5 GM |
3761 | struct window *w = XWINDOW (selected_window); |
3762 | struct glyph_row *row; | |
3763 | ||
959804a0 | 3764 | /* Give up if point moved out of or into a composition. */ |
7c752c80 | 3765 | if (check_point_in_composition (current_buffer, XINT (w->last_point), |
959804a0 KH |
3766 | current_buffer, PT)) |
3767 | return 0; | |
3768 | ||
5f5c8ee5 GM |
3769 | /* Give up if face attributes have been changed. */ |
3770 | if (face_change_count) | |
3771 | return 0; | |
177c0ea7 JB |
3772 | |
3773 | /* Give up if current matrix is not up to date or we are | |
5f5c8ee5 GM |
3774 | displaying a message. */ |
3775 | if (!display_completed || cursor_in_echo_area) | |
3776 | return 0; | |
3777 | ||
3778 | /* Give up if the buffer's direction is reversed. */ | |
3779 | if (!NILP (XBUFFER (w->buffer)->direction_reversed)) | |
3780 | return 0; | |
3781 | ||
3782 | /* Can't use direct output if highlighting a region. */ | |
3783 | if (!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active)) | |
3784 | return 0; | |
3785 | ||
f1f13490 GM |
3786 | /* Can't use direct output if highlighting trailing whitespace. */ |
3787 | if (!NILP (Vshow_trailing_whitespace)) | |
3788 | return 0; | |
3789 | ||
d2d2ddaf GM |
3790 | /* Give up if we are showing a message or just cleared the message |
3791 | because we might need to resize the echo area window. */ | |
3792 | if (!NILP (echo_area_buffer[0]) || !NILP (echo_area_buffer[1])) | |
3793 | return 0; | |
3794 | ||
e4e0bee9 GM |
3795 | /* Give up if currently displaying a message instead of the |
3796 | minibuffer contents. */ | |
3797 | if (XWINDOW (minibuf_window) == w | |
3798 | && EQ (minibuf_window, echo_area_window)) | |
3799 | return 0; | |
177c0ea7 | 3800 | |
d2d2ddaf GM |
3801 | /* Give up if we don't know where the cursor is. */ |
3802 | if (w->cursor.vpos < 0) | |
3803 | return 0; | |
3804 | ||
5f5c8ee5 GM |
3805 | row = MATRIX_ROW (w->current_matrix, w->cursor.vpos); |
3806 | ||
2a8bd25f | 3807 | /* Give up if PT is outside of the last known cursor row. */ |
9b784ab8 GM |
3808 | if (PT <= MATRIX_ROW_START_CHARPOS (row) |
3809 | || PT >= MATRIX_ROW_END_CHARPOS (row)) | |
5f5c8ee5 GM |
3810 | return 0; |
3811 | ||
3812 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
177c0ea7 | 3813 | |
5f5c8ee5 GM |
3814 | w->last_cursor = w->cursor; |
3815 | XSETFASTINT (w->last_point, PT); | |
3816 | ||
3817 | xassert (w->cursor.hpos >= 0 | |
3818 | && w->cursor.hpos < w->desired_matrix->matrix_w); | |
177c0ea7 | 3819 | |
5f5c8ee5 | 3820 | if (FRAME_WINDOW_P (f)) |
fa971ac3 KL |
3821 | FRAME_RIF (f)->cursor_to (w->cursor.vpos, w->cursor.hpos, |
3822 | w->cursor.y, w->cursor.x); | |
5f5c8ee5 GM |
3823 | else |
3824 | { | |
3825 | int x, y; | |
3826 | x = (WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos) | |
7df02016 KS |
3827 | + (INTEGERP (w->left_margin_cols) |
3828 | ? XFASTINT (w->left_margin_cols) | |
5f5c8ee5 GM |
3829 | : 0)); |
3830 | y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
385ed61f | 3831 | cursor_to (f, y, x); |
4588ec20 | 3832 | } |
177c0ea7 | 3833 | |
daf01701 | 3834 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3835 | fflush (FRAME_TTY (f)->output); |
5f5c8ee5 | 3836 | redisplay_performed_directly_p = 1; |
4588ec20 JB |
3837 | return 1; |
3838 | } | |
5f5c8ee5 GM |
3839 | |
3840 | ||
4588ec20 | 3841 | \f |
5f5c8ee5 GM |
3842 | /*********************************************************************** |
3843 | Frame Update | |
3844 | ***********************************************************************/ | |
4588ec20 | 3845 | |
5f5c8ee5 | 3846 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 3847 | |
5f5c8ee5 GM |
3848 | If FORCE_P is non-zero, don't let redisplay be stopped by detecting |
3849 | pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try | |
3850 | scrolling. | |
177c0ea7 | 3851 | |
5f5c8ee5 | 3852 | Value is non-zero if redisplay was stopped due to pending input. */ |
4588ec20 | 3853 | |
5f5c8ee5 GM |
3854 | int |
3855 | update_frame (f, force_p, inhibit_hairy_id_p) | |
3856 | struct frame *f; | |
3857 | int force_p; | |
3858 | int inhibit_hairy_id_p; | |
3859 | { | |
3860 | /* 1 means display has been paused because of pending input. */ | |
3861 | int paused_p; | |
3862 | struct window *root_window = XWINDOW (f->root_window); | |
3863 | ||
a2130dbb KS |
3864 | if (redisplay_dont_pause) |
3865 | force_p = 1; | |
d012c62b | 3866 | #if PERIODIC_PREEMPTION_CHECKING |
a2130dbb KS |
3867 | else if (NILP (Vredisplay_preemption_period)) |
3868 | force_p = 1; | |
3869 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
3870 | { |
3871 | EMACS_TIME tm; | |
3872 | double p = XFLOATINT (Vredisplay_preemption_period); | |
3873 | int sec, usec; | |
3874 | ||
993d4ab6 KS |
3875 | if (detect_input_pending_ignore_squeezables ()) |
3876 | { | |
3877 | paused_p = 1; | |
3878 | goto do_pause; | |
3879 | } | |
3880 | ||
d012c62b KS |
3881 | sec = (int) p; |
3882 | usec = (p - sec) * 1000000; | |
3883 | ||
3884 | EMACS_GET_TIME (tm); | |
3885 | EMACS_SET_SECS_USECS (preemption_period, sec, usec); | |
3886 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
3887 | } | |
3888 | #endif | |
3889 | ||
5f5c8ee5 | 3890 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3891 | { |
5f5c8ee5 GM |
3892 | /* We are working on window matrix basis. All windows whose |
3893 | flag must_be_updated_p is set have to be updated. */ | |
3894 | ||
3895 | /* Record that we are not working on frame matrices. */ | |
3896 | set_frame_matrix_frame (NULL); | |
3897 | ||
3898 | /* Update all windows in the window tree of F, maybe stopping | |
3899 | when pending input is detected. */ | |
3900 | update_begin (f); | |
3901 | ||
3902 | /* Update the menu bar on X frames that don't have toolkit | |
3903 | support. */ | |
3904 | if (WINDOWP (f->menu_bar_window)) | |
3905 | update_window (XWINDOW (f->menu_bar_window), 1); | |
3906 | ||
3907 | /* Update the tool-bar window, if present. */ | |
9ea173e8 | 3908 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3909 | { |
9ea173e8 | 3910 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3911 | |
3912 | /* Update tool-bar window. */ | |
3913 | if (w->must_be_updated_p) | |
4588ec20 | 3914 | { |
153a073c PJ |
3915 | Lisp_Object tem; |
3916 | ||
5f5c8ee5 GM |
3917 | update_window (w, 1); |
3918 | w->must_be_updated_p = 0; | |
3919 | ||
3920 | /* Swap tool-bar strings. We swap because we want to | |
3921 | reuse strings. */ | |
9ea173e8 GM |
3922 | tem = f->current_tool_bar_string; |
3923 | f->current_tool_bar_string = f->desired_tool_bar_string; | |
3924 | f->desired_tool_bar_string = tem; | |
4588ec20 JB |
3925 | } |
3926 | } | |
177c0ea7 | 3927 | |
5f5c8ee5 GM |
3928 | |
3929 | /* Update windows. */ | |
3930 | paused_p = update_window_tree (root_window, force_p); | |
3931 | update_end (f); | |
177c0ea7 | 3932 | |
6b61353c | 3933 | /* This flush is a performance bottleneck under X, |
e581a466 | 3934 | and it doesn't seem to be necessary anyway (in general). |
6b61353c | 3935 | It is necessary when resizing the window with the mouse, or |
e581a466 | 3936 | at least the fringes are not redrawn in a timely manner. ++kfs */ |
6b61353c | 3937 | if (f->force_flush_display_p) |
e581a466 KL |
3938 | { |
3939 | FRAME_RIF (f)->flush_display (f); | |
3940 | f->force_flush_display_p = 0; | |
3941 | } | |
4588ec20 | 3942 | } |
5f5c8ee5 GM |
3943 | else |
3944 | { | |
3945 | /* We are working on frame matrix basis. Set the frame on whose | |
3946 | frame matrix we operate. */ | |
3947 | set_frame_matrix_frame (f); | |
3948 | ||
868dd24b | 3949 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3950 | build_frame_matrix (f); |
177c0ea7 | 3951 | |
868dd24b GM |
3952 | /* Update the display */ |
3953 | update_begin (f); | |
5f5c8ee5 | 3954 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3955 | update_end (f); |
3956 | ||
7d2f1216 | 3957 | if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f)) |
3224dac1 | 3958 | { |
0b0d3e0b KL |
3959 | if (FRAME_TTY (f)->termscript) |
3960 | fflush (FRAME_TTY (f)->termscript); | |
7d2f1216 EZ |
3961 | if (FRAME_TERMCAP_P (f)) |
3962 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3963 | } |
868dd24b | 3964 | |
5f5c8ee5 | 3965 | /* Check window matrices for lost pointers. */ |
2d5912c1 | 3966 | #if GLYPH_DEBUG |
9b0e97aa GM |
3967 | check_window_matrix_pointers (root_window); |
3968 | add_frame_display_history (f, paused_p); | |
3969 | #endif | |
5f5c8ee5 GM |
3970 | } |
3971 | ||
993d4ab6 | 3972 | do_pause: |
5f5c8ee5 GM |
3973 | /* Reset flags indicating that a window should be updated. */ |
3974 | set_window_update_flags (root_window, 0); | |
177c0ea7 | 3975 | |
868dd24b | 3976 | display_completed = !paused_p; |
5f5c8ee5 | 3977 | return paused_p; |
4588ec20 | 3978 | } |
5f5c8ee5 GM |
3979 | |
3980 | ||
4588ec20 | 3981 | \f |
5f5c8ee5 GM |
3982 | /************************************************************************ |
3983 | Window-based updates | |
3984 | ************************************************************************/ | |
3985 | ||
3986 | /* Perform updates in window tree rooted at W. FORCE_P non-zero means | |
3987 | don't stop updating when input is pending. */ | |
3988 | ||
3989 | static int | |
3990 | update_window_tree (w, force_p) | |
3991 | struct window *w; | |
3992 | int force_p; | |
3993 | { | |
3994 | int paused_p = 0; | |
177c0ea7 | 3995 | |
5f5c8ee5 GM |
3996 | while (w && !paused_p) |
3997 | { | |
3998 | if (!NILP (w->hchild)) | |
3999 | paused_p |= update_window_tree (XWINDOW (w->hchild), force_p); | |
4000 | else if (!NILP (w->vchild)) | |
4001 | paused_p |= update_window_tree (XWINDOW (w->vchild), force_p); | |
4002 | else if (w->must_be_updated_p) | |
4003 | paused_p |= update_window (w, force_p); | |
4004 | ||
4005 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
4006 | } | |
4007 | ||
4008 | return paused_p; | |
4009 | } | |
4010 | ||
4011 | ||
4012 | /* Update window W if its flag must_be_updated_p is non-zero. If | |
4013 | FORCE_P is non-zero, don't stop updating if input is pending. */ | |
4014 | ||
4015 | void | |
4016 | update_single_window (w, force_p) | |
4017 | struct window *w; | |
4018 | int force_p; | |
4019 | { | |
4020 | if (w->must_be_updated_p) | |
4021 | { | |
4022 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
4023 | ||
4024 | /* Record that this is not a frame-based redisplay. */ | |
4025 | set_frame_matrix_frame (NULL); | |
4026 | ||
a2130dbb KS |
4027 | if (redisplay_dont_pause) |
4028 | force_p = 1; | |
d012c62b | 4029 | #if PERIODIC_PREEMPTION_CHECKING |
a2130dbb KS |
4030 | else if (NILP (Vredisplay_preemption_period)) |
4031 | force_p = 1; | |
4032 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
4033 | { |
4034 | EMACS_TIME tm; | |
4035 | double p = XFLOATINT (Vredisplay_preemption_period); | |
4036 | int sec, usec; | |
4037 | ||
4038 | sec = (int) p; | |
4039 | usec = (p - sec) * 1000000; | |
4040 | ||
4041 | EMACS_GET_TIME (tm); | |
4042 | EMACS_SET_SECS_USECS (preemption_period, sec, usec); | |
4043 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
4044 | } | |
4045 | #endif | |
4046 | ||
5f5c8ee5 GM |
4047 | /* Update W. */ |
4048 | update_begin (f); | |
4049 | update_window (w, force_p); | |
4050 | update_end (f); | |
4588ec20 | 4051 | |
5f5c8ee5 GM |
4052 | /* Reset flag in W. */ |
4053 | w->must_be_updated_p = 0; | |
4054 | } | |
4055 | } | |
4588ec20 | 4056 | |
93e023fc | 4057 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 4058 | |
408f5064 GM |
4059 | /* Redraw lines from the current matrix of window W that are |
4060 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
4061 | ||
4062 | static void | |
4063 | redraw_overlapped_rows (w, yb) | |
4064 | struct window *w; | |
4065 | int yb; | |
4066 | { | |
d8ee7803 | 4067 | int i; |
fa971ac3 | 4068 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3fc809e2 | 4069 | |
408f5064 GM |
4070 | /* If rows overlapping others have been changed, the rows being |
4071 | overlapped have to be redrawn. This won't draw lines that have | |
4072 | already been drawn in update_window_line because overlapped_p in | |
4073 | desired rows is 0, so after row assignment overlapped_p in | |
4074 | current rows is 0. */ | |
4075 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
4076 | { | |
e876ff42 | 4077 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
4078 | |
4079 | if (!row->enabled_p) | |
4080 | break; | |
4081 | else if (row->mode_line_p) | |
4082 | continue; | |
177c0ea7 | 4083 | |
408f5064 GM |
4084 | if (row->overlapped_p) |
4085 | { | |
4086 | enum glyph_row_area area; | |
177c0ea7 | 4087 | |
408f5064 GM |
4088 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
4089 | { | |
4090 | updated_row = row; | |
4091 | updated_area = area; | |
fa971ac3 KL |
4092 | FRAME_RIF (f)->cursor_to (i, 0, row->y, |
4093 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 4094 | if (row->used[area]) |
fa971ac3 KL |
4095 | FRAME_RIF (f)->write_glyphs (row->glyphs[area], |
4096 | row->used[area]); | |
4097 | FRAME_RIF (f)->clear_end_of_line (-1); | |
408f5064 | 4098 | } |
177c0ea7 | 4099 | |
408f5064 GM |
4100 | row->overlapped_p = 0; |
4101 | } | |
4102 | ||
e876ff42 | 4103 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
4104 | break; |
4105 | } | |
4106 | } | |
4107 | ||
4108 | ||
4109 | /* Redraw lines from the current matrix of window W that overlap | |
4110 | others. YB is bottom-most y-position in W. */ | |
4111 | ||
4112 | static void | |
4113 | redraw_overlapping_rows (w, yb) | |
4114 | struct window *w; | |
4115 | int yb; | |
4116 | { | |
4117 | int i, bottom_y; | |
4118 | struct glyph_row *row; | |
fa971ac3 | 4119 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
3fc809e2 | 4120 | |
408f5064 GM |
4121 | for (i = 0; i < w->current_matrix->nrows; ++i) |
4122 | { | |
4123 | row = w->current_matrix->rows + i; | |
4124 | ||
4125 | if (!row->enabled_p) | |
4126 | break; | |
4127 | else if (row->mode_line_p) | |
4128 | continue; | |
177c0ea7 | 4129 | |
408f5064 GM |
4130 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
4131 | ||
4132 | if (row->overlapping_p && i > 0 && bottom_y < yb) | |
4133 | { | |
41124e06 YM |
4134 | int overlaps = 0; |
4135 | ||
4136 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) | |
4137 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) | |
4138 | overlaps |= OVERLAPS_PRED; | |
4139 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) | |
4140 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) | |
4141 | overlaps |= OVERLAPS_SUCC; | |
4142 | ||
4143 | if (overlaps) | |
4144 | { | |
4145 | if (row->used[LEFT_MARGIN_AREA]) | |
4146 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
4147 | ||
4148 | if (row->used[TEXT_AREA]) | |
4149 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
4150 | ||
4151 | if (row->used[RIGHT_MARGIN_AREA]) | |
4152 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
4153 | ||
4154 | /* Record in neighbour rows that ROW overwrites part of | |
4155 | their display. */ | |
4156 | if (overlaps & OVERLAPS_PRED) | |
4157 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
4158 | if (overlaps & OVERLAPS_SUCC) | |
4159 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
4160 | } | |
408f5064 GM |
4161 | } |
4162 | ||
4163 | if (bottom_y >= yb) | |
4164 | break; | |
4165 | } | |
4166 | } | |
4167 | ||
93e023fc KS |
4168 | #endif /* HAVE_WINDOW_SYSTEM */ |
4169 | ||
408f5064 | 4170 | |
93962bfa GM |
4171 | #ifdef GLYPH_DEBUG |
4172 | ||
4173 | /* Check that no row in the current matrix of window W is enabled | |
4174 | which is below what's displayed in the window. */ | |
4175 | ||
4176 | void | |
4177 | check_current_matrix_flags (w) | |
4178 | struct window *w; | |
4179 | { | |
4180 | int last_seen_p = 0; | |
4181 | int i, yb = window_text_bottom_y (w); | |
4182 | ||
4183 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
4184 | { | |
4185 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
4186 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
4187 | last_seen_p = 1; | |
4188 | else if (last_seen_p && row->enabled_p) | |
4189 | abort (); | |
4190 | } | |
4191 | } | |
4192 | ||
4193 | #endif /* GLYPH_DEBUG */ | |
4194 | ||
4195 | ||
5f5c8ee5 GM |
4196 | /* Update display of window W. FORCE_P non-zero means that we should |
4197 | not stop when detecting pending input. */ | |
4198 | ||
4199 | static int | |
4200 | update_window (w, force_p) | |
4588ec20 | 4201 | struct window *w; |
5f5c8ee5 | 4202 | int force_p; |
4588ec20 | 4203 | { |
5f5c8ee5 GM |
4204 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4205 | int paused_p; | |
d012c62b | 4206 | #if !PERIODIC_PREEMPTION_CHECKING |
5f5c8ee5 | 4207 | int preempt_count = baud_rate / 2400 + 1; |
d012c62b | 4208 | #endif |
5f5c8ee5 | 4209 | extern int input_pending; |
8fd9a666 | 4210 | extern Lisp_Object do_mouse_tracking; |
597cfb3f | 4211 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
b96fd3e8 | 4212 | #if GLYPH_DEBUG |
5f5c8ee5 | 4213 | /* Check that W's frame doesn't have glyph matrices. */ |
82f4a138 | 4214 | xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 4215 | #endif |
5f5c8ee5 GM |
4216 | |
4217 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb KS |
4218 | #if !PERIODIC_PREEMPTION_CHECKING |
4219 | if (!force_p) | |
a2d5fca0 | 4220 | detect_input_pending_ignore_squeezables (); |
d012c62b | 4221 | #endif |
4588ec20 | 4222 | |
5f5c8ee5 GM |
4223 | /* If forced to complete the update, or if no input is pending, do |
4224 | the update. */ | |
8fd9a666 | 4225 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 4226 | { |
5f5c8ee5 GM |
4227 | struct glyph_row *row, *end; |
4228 | struct glyph_row *mode_line_row; | |
56974e03 | 4229 | struct glyph_row *header_line_row; |
e87b8809 | 4230 | int yb, changed_p = 0, mouse_face_overwritten_p = 0, n_updated; |
5f5c8ee5 GM |
4231 | |
4232 | rif->update_window_begin_hook (w); | |
4233 | yb = window_text_bottom_y (w); | |
4234 | ||
153a073c PJ |
4235 | /* If window has a header line, update it before everything else. |
4236 | Adjust y-positions of other rows by the header line height. */ | |
5f5c8ee5 GM |
4237 | row = desired_matrix->rows; |
4238 | end = row + desired_matrix->nrows - 1; | |
177c0ea7 | 4239 | |
5f5c8ee5 | 4240 | if (row->mode_line_p) |
56974e03 GM |
4241 | { |
4242 | header_line_row = row; | |
4243 | ++row; | |
4244 | } | |
4245 | else | |
4246 | header_line_row = NULL; | |
5f5c8ee5 GM |
4247 | |
4248 | /* Update the mode line, if necessary. */ | |
4249 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
4250 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
4251 | { | |
4252 | mode_line_row->y = yb; | |
4253 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
4254 | desired_matrix), |
4255 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
4256 | } |
4257 | ||
4258 | /* Find first enabled row. Optimizations in redisplay_internal | |
4259 | may lead to an update with only one row enabled. There may | |
4260 | be also completely empty matrices. */ | |
4261 | while (row < end && !row->enabled_p) | |
4262 | ++row; | |
177c0ea7 | 4263 | |
bfdcafe1 | 4264 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 4265 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
4266 | { |
4267 | int rc = scrolling_window (w, header_line_row != NULL); | |
4268 | if (rc < 0) | |
4269 | { | |
4270 | /* All rows were found to be equal. */ | |
4271 | paused_p = 0; | |
4272 | goto set_cursor; | |
4273 | } | |
4274 | else if (rc > 0) | |
6b61353c KH |
4275 | { |
4276 | /* We've scrolled the display. */ | |
4277 | force_p = 1; | |
4278 | changed_p = 1; | |
4279 | } | |
5f5c8ee5 GM |
4280 | } |
4281 | ||
4282 | /* Update the rest of the lines. */ | |
e87b8809 | 4283 | for (n_updated = 0; row < end && (force_p || !input_pending); ++row) |
b7412313 | 4284 | if (row->enabled_p) |
5f5c8ee5 GM |
4285 | { |
4286 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
4287 | int i; | |
177c0ea7 | 4288 | |
153a073c | 4289 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
4290 | detect_input_pending. If it's done too often, |
4291 | scrolling large windows with repeated scroll-up | |
4292 | commands will too quickly pause redisplay. */ | |
d012c62b KS |
4293 | #if PERIODIC_PREEMPTION_CHECKING |
4294 | if (!force_p) | |
4295 | { | |
4296 | EMACS_TIME tm, dif; | |
4297 | EMACS_GET_TIME (tm); | |
4298 | EMACS_SUB_TIME (dif, preemption_next_check, tm); | |
4299 | if (EMACS_TIME_NEG_P (dif)) | |
4300 | { | |
4301 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
4302 | if (detect_input_pending_ignore_squeezables ()) |
4303 | break; | |
d012c62b KS |
4304 | } |
4305 | } | |
4306 | #else | |
e87b8809 | 4307 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 4308 | detect_input_pending_ignore_squeezables (); |
d012c62b | 4309 | #endif |
e876ff42 GM |
4310 | changed_p |= update_window_line (w, vpos, |
4311 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
4312 | |
4313 | /* Mark all rows below the last visible one in the current | |
4314 | matrix as invalid. This is necessary because of | |
4315 | variable line heights. Consider the case of three | |
4316 | successive redisplays, where the first displays 5 | |
4317 | lines, the second 3 lines, and the third 5 lines again. | |
4318 | If the second redisplay wouldn't mark rows in the | |
4319 | current matrix invalid, the third redisplay might be | |
4320 | tempted to optimize redisplay based on lines displayed | |
4321 | in the first redisplay. */ | |
4322 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
4323 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
4324 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
4325 | } | |
4326 | ||
4327 | /* Was display preempted? */ | |
4328 | paused_p = row < end; | |
177c0ea7 | 4329 | |
56974e03 | 4330 | set_cursor: |
177c0ea7 | 4331 | |
6b61353c KH |
4332 | /* Update the header line after scrolling because a new header |
4333 | line would otherwise overwrite lines at the top of the window | |
4334 | that can be scrolled. */ | |
4335 | if (header_line_row && header_line_row->enabled_p) | |
4336 | { | |
4337 | header_line_row->y = 0; | |
4338 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
6b61353c KH |
4339 | } |
4340 | ||
153a073c | 4341 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
4342 | if (!paused_p && !w->pseudo_window_p) |
4343 | { | |
93e023fc | 4344 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
4345 | if (changed_p && rif->fix_overlapping_area) |
4346 | { | |
4347 | redraw_overlapped_rows (w, yb); | |
4348 | redraw_overlapping_rows (w, yb); | |
4349 | } | |
93e023fc | 4350 | #endif |
177c0ea7 | 4351 | |
5f5c8ee5 GM |
4352 | /* Make cursor visible at cursor position of W. */ |
4353 | set_window_cursor_after_update (w); | |
4354 | ||
e876ff42 GM |
4355 | #if 0 /* Check that current matrix invariants are satisfied. This is |
4356 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
4357 | IF_DEBUG (check_matrix_invariants (w)); |
4358 | #endif | |
4588ec20 | 4359 | } |
5f5c8ee5 GM |
4360 | |
4361 | #if GLYPH_DEBUG | |
4362 | /* Remember the redisplay method used to display the matrix. */ | |
4363 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
4364 | #endif | |
408f5064 | 4365 | |
6b61353c KH |
4366 | #ifdef HAVE_WINDOW_SYSTEM |
4367 | update_window_fringes (w, 0); | |
4368 | #endif | |
4369 | ||
56974e03 GM |
4370 | /* End the update of window W. Don't set the cursor if we |
4371 | paused updating the display because in this case, | |
4372 | set_window_cursor_after_update hasn't been called, and | |
4373 | output_cursor doesn't contain the cursor location. */ | |
4374 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); | |
4588ec20 | 4375 | } |
5f5c8ee5 GM |
4376 | else |
4377 | paused_p = 1; | |
4378 | ||
2d5912c1 | 4379 | #if GLYPH_DEBUG |
0cffd9d8 | 4380 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
4381 | add_window_display_history (w, w->current_matrix->method, paused_p); |
4382 | #endif | |
177c0ea7 | 4383 | |
5f5c8ee5 | 4384 | clear_glyph_matrix (desired_matrix); |
408f5064 | 4385 | |
5f5c8ee5 | 4386 | return paused_p; |
4588ec20 JB |
4387 | } |
4388 | ||
b64b3980 | 4389 | |
5f5c8ee5 GM |
4390 | /* Update the display of area AREA in window W, row number VPOS. |
4391 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
4392 | ||
4393 | static void | |
4394 | update_marginal_area (w, area, vpos) | |
b64b3980 | 4395 | struct window *w; |
5f5c8ee5 | 4396 | int area, vpos; |
b64b3980 | 4397 | { |
5f5c8ee5 | 4398 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 4399 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4400 | |
4401 | /* Let functions in xterm.c know what area subsequent X positions | |
4402 | will be relative to. */ | |
4403 | updated_area = area; | |
4404 | ||
4405 | /* Set cursor to start of glyphs, write them, and clear to the end | |
4406 | of the area. I don't think that something more sophisticated is | |
4407 | necessary here, since marginal areas will not be the default. */ | |
4408 | rif->cursor_to (vpos, 0, desired_row->y, 0); | |
4409 | if (desired_row->used[area]) | |
4410 | rif->write_glyphs (desired_row->glyphs[area], desired_row->used[area]); | |
4411 | rif->clear_end_of_line (-1); | |
b64b3980 | 4412 | } |
23b0200c | 4413 | |
352f1545 | 4414 | |
408f5064 GM |
4415 | /* Update the display of the text area of row VPOS in window W. |
4416 | Value is non-zero if display has changed. */ | |
5f5c8ee5 | 4417 | |
408f5064 | 4418 | static int |
5f5c8ee5 | 4419 | update_text_area (w, vpos) |
23b0200c | 4420 | struct window *w; |
5f5c8ee5 | 4421 | int vpos; |
23b0200c | 4422 | { |
5f5c8ee5 GM |
4423 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
4424 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 4425 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 4426 | int changed_p = 0; |
5f5c8ee5 GM |
4427 | |
4428 | /* Let functions in xterm.c know what area subsequent X positions | |
4429 | will be relative to. */ | |
4430 | updated_area = TEXT_AREA; | |
177c0ea7 | 4431 | |
5f5c8ee5 GM |
4432 | /* If rows are at different X or Y, or rows have different height, |
4433 | or the current row is marked invalid, write the entire line. */ | |
4434 | if (!current_row->enabled_p | |
4435 | || desired_row->y != current_row->y | |
4436 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
4437 | || desired_row->phys_ascent != current_row->phys_ascent |
4438 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 4439 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 4440 | || current_row->overlapped_p |
fee8b690 CY |
4441 | /* This next line is necessary for correctly redrawing |
4442 | mouse-face areas after scrolling and other operations. | |
4443 | However, it causes excessive flickering when mouse is moved | |
4444 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
4445 | line doesn't seem to hurt anything. -- cyd. |
4446 | But it is still needed for the header line. -- kfs. */ | |
4447 | || (current_row->mouse_face_p | |
4448 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
4449 | || current_row->x != desired_row->x) |
4450 | { | |
4451 | rif->cursor_to (vpos, 0, desired_row->y, desired_row->x); | |
177c0ea7 | 4452 | |
5f5c8ee5 GM |
4453 | if (desired_row->used[TEXT_AREA]) |
4454 | rif->write_glyphs (desired_row->glyphs[TEXT_AREA], | |
4455 | desired_row->used[TEXT_AREA]); | |
177c0ea7 | 4456 | |
5f5c8ee5 GM |
4457 | /* Clear to end of window. */ |
4458 | rif->clear_end_of_line (-1); | |
408f5064 | 4459 | changed_p = 1; |
60f2f3f1 GM |
4460 | |
4461 | /* This erases the cursor. We do this here because | |
4462 | notice_overwritten_cursor cannot easily check this, which | |
4463 | might indicate that the whole functionality of | |
4464 | notice_overwritten_cursor would better be implemented here. | |
4465 | On the other hand, we need notice_overwritten_cursor as long | |
4466 | as mouse highlighting is done asynchronously outside of | |
4467 | redisplay. */ | |
4468 | if (vpos == w->phys_cursor.vpos) | |
4469 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
4470 | } |
4471 | else | |
4472 | { | |
4473 | int stop, i, x; | |
4474 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
4475 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
e47306e6 | 4476 | int overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 4477 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
91d227d9 | 4478 | int abort_skipping = 0; |
5f5c8ee5 | 4479 | |
78897758 YM |
4480 | /* If the desired row extends its face to the text area end, and |
4481 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
4482 | make sure we write at least one glyph, so that the face |
4483 | extension actually takes place. */ | |
78897758 YM |
4484 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
4485 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
4486 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
4487 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 4488 | --desired_stop_pos; |
177c0ea7 | 4489 | |
5f5c8ee5 GM |
4490 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
4491 | i = 0; | |
4492 | x = desired_row->x; | |
8399f8a0 GM |
4493 | |
4494 | /* Loop over glyphs that current and desired row may have | |
4495 | in common. */ | |
5f5c8ee5 | 4496 | while (i < stop) |
352f1545 | 4497 | { |
91d227d9 | 4498 | int can_skip_p = !abort_skipping; |
177c0ea7 | 4499 | |
5f5c8ee5 | 4500 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
4501 | don't have to be written. We can't skip if the last |
4502 | current glyph overlaps the glyph to its right. For | |
4503 | example, consider a current row of `if ' with the `f' in | |
4504 | Courier bold so that it overlaps the ` ' to its right. | |
4505 | If the desired row is ` ', we would skip over the space | |
4506 | after the `if' and there would remain a pixel from the | |
4507 | `f' on the screen. */ | |
4508 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 4509 | { |
e47306e6 GM |
4510 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
4511 | int left, right; | |
177c0ea7 | 4512 | |
e47306e6 GM |
4513 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
4514 | &left, &right); | |
91d227d9 | 4515 | can_skip_p = (right == 0 && !abort_skipping); |
352f1545 | 4516 | } |
177c0ea7 | 4517 | |
6d950f4c | 4518 | if (can_skip_p) |
352f1545 | 4519 | { |
91d227d9 CY |
4520 | int start_hpos = i; |
4521 | ||
6d950f4c GM |
4522 | while (i < stop |
4523 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
4524 | { | |
4525 | x += desired_glyph->pixel_width; | |
4526 | ++desired_glyph, ++current_glyph, ++i; | |
4527 | } | |
4528 | ||
4529 | /* Consider the case that the current row contains "xxx | |
4530 | ppp ggg" in italic Courier font, and the desired row | |
4531 | is "xxx ggg". The character `p' has lbearing, `g' | |
4532 | has not. The loop above will stop in front of the | |
4533 | first `p' in the current row. If we would start | |
4534 | writing glyphs there, we wouldn't erase the lbearing | |
4535 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 4536 | taken care of by draw_glyphs. */ |
6d950f4c GM |
4537 | if (overlapping_glyphs_p |
4538 | && i > 0 | |
4539 | && i < current_row->used[TEXT_AREA] | |
4540 | && (current_row->used[TEXT_AREA] | |
4541 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 4542 | { |
6d950f4c | 4543 | int left, right; |
177c0ea7 | 4544 | |
6d950f4c GM |
4545 | rif->get_glyph_overhangs (current_glyph, XFRAME (w->frame), |
4546 | &left, &right); | |
4547 | while (left > 0 && i > 0) | |
4548 | { | |
4549 | --i, --desired_glyph, --current_glyph; | |
4550 | x -= desired_glyph->pixel_width; | |
4551 | left -= desired_glyph->pixel_width; | |
4552 | } | |
91d227d9 CY |
4553 | |
4554 | /* Abort the skipping algorithm if we end up before | |
4555 | our starting point, to avoid looping (bug#1070). | |
4556 | This can happen when the lbearing is larger than | |
4557 | the pixel width. */ | |
4558 | abort_skipping = (i < start_hpos); | |
5f5c8ee5 | 4559 | } |
352f1545 | 4560 | } |
177c0ea7 | 4561 | |
5f5c8ee5 GM |
4562 | /* Try to avoid writing the entire rest of the desired row |
4563 | by looking for a resync point. This mainly prevents | |
4564 | mode line flickering in the case the mode line is in | |
4565 | fixed-pitch font, which it usually will be. */ | |
4566 | if (i < desired_row->used[TEXT_AREA]) | |
4567 | { | |
4568 | int start_x = x, start_hpos = i; | |
4569 | struct glyph *start = desired_glyph; | |
4570 | int current_x = x; | |
6d950f4c GM |
4571 | int skip_first_p = !can_skip_p; |
4572 | ||
5f5c8ee5 GM |
4573 | /* Find the next glyph that's equal again. */ |
4574 | while (i < stop | |
6d950f4c GM |
4575 | && (skip_first_p |
4576 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
4577 | && x == current_x) |
4578 | { | |
4579 | x += desired_glyph->pixel_width; | |
4580 | current_x += current_glyph->pixel_width; | |
4581 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 4582 | skip_first_p = 0; |
5f5c8ee5 | 4583 | } |
23b0200c | 4584 | |
5f5c8ee5 GM |
4585 | if (i == start_hpos || x != current_x) |
4586 | { | |
4587 | i = start_hpos; | |
4588 | x = start_x; | |
4589 | desired_glyph = start; | |
4590 | break; | |
4591 | } | |
e47306e6 | 4592 | |
5f5c8ee5 GM |
4593 | rif->cursor_to (vpos, start_hpos, desired_row->y, start_x); |
4594 | rif->write_glyphs (start, i - start_hpos); | |
408f5064 | 4595 | changed_p = 1; |
5f5c8ee5 GM |
4596 | } |
4597 | } | |
177c0ea7 | 4598 | |
5f5c8ee5 GM |
4599 | /* Write the rest. */ |
4600 | if (i < desired_row->used[TEXT_AREA]) | |
4601 | { | |
4602 | rif->cursor_to (vpos, i, desired_row->y, x); | |
4603 | rif->write_glyphs (desired_glyph, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 4604 | changed_p = 1; |
5f5c8ee5 | 4605 | } |
177c0ea7 | 4606 | |
5f5c8ee5 GM |
4607 | /* Maybe clear to end of line. */ |
4608 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
4609 | { | |
4610 | /* If new row extends to the end of the text area, nothing | |
4611 | has to be cleared, if and only if we did a write_glyphs | |
4612 | above. This is made sure by setting desired_stop_pos | |
4613 | appropriately above. */ | |
78897758 YM |
4614 | xassert (i < desired_row->used[TEXT_AREA] |
4615 | || ((desired_row->used[TEXT_AREA] | |
4616 | == current_row->used[TEXT_AREA]) | |
4617 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
4618 | } |
4619 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
4620 | { | |
4621 | /* If old row extends to the end of the text area, clear. */ | |
4622 | if (i >= desired_row->used[TEXT_AREA]) | |
4623 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 4624 | desired_row->pixel_width); |
5f5c8ee5 | 4625 | rif->clear_end_of_line (-1); |
408f5064 | 4626 | changed_p = 1; |
5f5c8ee5 GM |
4627 | } |
4628 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 4629 | { |
5f5c8ee5 GM |
4630 | /* Otherwise clear to the end of the old row. Everything |
4631 | after that position should be clear already. */ | |
4632 | int x; | |
177c0ea7 | 4633 | |
5f5c8ee5 GM |
4634 | if (i >= desired_row->used[TEXT_AREA]) |
4635 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 4636 | desired_row->pixel_width); |
5f5c8ee5 GM |
4637 | |
4638 | /* If cursor is displayed at the end of the line, make sure | |
4639 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
4640 | with which to erase the cursor (because this method | |
4641 | doesn't work with lbearing/rbearing), so we must do it | |
4642 | this way. */ | |
4643 | if (vpos == w->phys_cursor.vpos | |
4644 | && w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]) | |
4645 | { | |
4646 | w->phys_cursor_on_p = 0; | |
4647 | x = -1; | |
4648 | } | |
4649 | else | |
6b61353c | 4650 | x = current_row->pixel_width; |
5f5c8ee5 | 4651 | rif->clear_end_of_line (x); |
408f5064 | 4652 | changed_p = 1; |
2e8907d3 | 4653 | } |
23b0200c | 4654 | } |
408f5064 GM |
4655 | |
4656 | return changed_p; | |
23b0200c | 4657 | } |
4588ec20 | 4658 | |
5f5c8ee5 | 4659 | |
408f5064 GM |
4660 | /* Update row VPOS in window W. Value is non-zero if display has been |
4661 | changed. */ | |
5f5c8ee5 | 4662 | |
408f5064 | 4663 | static int |
e876ff42 | 4664 | update_window_line (w, vpos, mouse_face_overwritten_p) |
5f5c8ee5 | 4665 | struct window *w; |
e876ff42 | 4666 | int vpos, *mouse_face_overwritten_p; |
5f5c8ee5 GM |
4667 | { |
4668 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
4669 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 4670 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 4671 | int changed_p = 0; |
5f5c8ee5 | 4672 | |
5f5c8ee5 GM |
4673 | /* Set the row being updated. This is important to let xterm.c |
4674 | know what line height values are in effect. */ | |
4675 | updated_row = desired_row; | |
4676 | ||
177c0ea7 JB |
4677 | /* A row can be completely invisible in case a desired matrix was |
4678 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
4679 | the matrix. Make sure to make such rows current anyway, since |
4680 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
4681 | if (desired_row->mode_line_p |
4682 | || desired_row->visible_height > 0) | |
408f5064 | 4683 | { |
504805ac GM |
4684 | xassert (desired_row->enabled_p); |
4685 | ||
4686 | /* Update display of the left margin area, if there is one. */ | |
4687 | if (!desired_row->full_width_p | |
7df02016 | 4688 | && !NILP (w->left_margin_cols)) |
504805ac GM |
4689 | { |
4690 | changed_p = 1; | |
4691 | update_marginal_area (w, LEFT_MARGIN_AREA, vpos); | |
4692 | } | |
177c0ea7 | 4693 | |
504805ac GM |
4694 | /* Update the display of the text area. */ |
4695 | if (update_text_area (w, vpos)) | |
4696 | { | |
4697 | changed_p = 1; | |
4698 | if (current_row->mouse_face_p) | |
4699 | *mouse_face_overwritten_p = 1; | |
4700 | } | |
177c0ea7 | 4701 | |
504805ac GM |
4702 | /* Update display of the right margin area, if there is one. */ |
4703 | if (!desired_row->full_width_p | |
7df02016 | 4704 | && !NILP (w->right_margin_cols)) |
504805ac GM |
4705 | { |
4706 | changed_p = 1; | |
4707 | update_marginal_area (w, RIGHT_MARGIN_AREA, vpos); | |
4708 | } | |
177c0ea7 | 4709 | |
504805ac GM |
4710 | /* Draw truncation marks etc. */ |
4711 | if (!current_row->enabled_p | |
4712 | || desired_row->y != current_row->y | |
4713 | || desired_row->visible_height != current_row->visible_height | |
6b61353c | 4714 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 4715 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
6b61353c | 4716 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 4717 | || desired_row->mode_line_p != current_row->mode_line_p |
6b61353c | 4718 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
4719 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
4720 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
4721 | rif->after_update_window_line_hook (desired_row); | |
408f5064 | 4722 | } |
177c0ea7 | 4723 | |
5f5c8ee5 GM |
4724 | /* Update current_row from desired_row. */ |
4725 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
4726 | updated_row = NULL; | |
408f5064 | 4727 | return changed_p; |
5f5c8ee5 GM |
4728 | } |
4729 | ||
4730 | ||
4731 | /* Set the cursor after an update of window W. This function may only | |
4732 | be called from update_window. */ | |
4733 | ||
4734 | static void | |
4735 | set_window_cursor_after_update (w) | |
4588ec20 JB |
4736 | struct window *w; |
4737 | { | |
5f5c8ee5 | 4738 | struct frame *f = XFRAME (w->frame); |
fa971ac3 | 4739 | struct redisplay_interface *rif = FRAME_RIF (f); |
5f5c8ee5 GM |
4740 | int cx, cy, vpos, hpos; |
4741 | ||
4742 | /* Not intended for frame matrix updates. */ | |
4743 | xassert (FRAME_WINDOW_P (f)); | |
177c0ea7 | 4744 | |
b96fd3e8 GM |
4745 | if (cursor_in_echo_area |
4746 | && !NILP (echo_area_buffer[0]) | |
4747 | /* If we are showing a message instead of the mini-buffer, | |
4748 | show the cursor for the message instead. */ | |
4749 | && XWINDOW (minibuf_window) == w | |
4750 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
4751 | /* These cases apply only to the frame that contains |
4752 | the active mini-buffer window. */ | |
4753 | && FRAME_HAS_MINIBUF_P (f) | |
4754 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
4755 | { | |
4756 | cx = cy = vpos = hpos = 0; | |
4757 | ||
4758 | if (cursor_in_echo_area >= 0) | |
4759 | { | |
4760 | /* If the mini-buffer is several lines high, find the last | |
4761 | line that has any text on it. Note: either all lines | |
4762 | are enabled or none. Otherwise we wouldn't be able to | |
4763 | determine Y. */ | |
862b4790 GM |
4764 | struct glyph_row *row, *last_row; |
4765 | struct glyph *glyph; | |
4766 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 4767 | |
862b4790 | 4768 | last_row = NULL; |
6206f8ce GM |
4769 | row = w->current_matrix->rows; |
4770 | while (row->enabled_p | |
4771 | && (last_row == NULL | |
4772 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 4773 | { |
862b4790 GM |
4774 | if (row->used[TEXT_AREA] |
4775 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
4776 | last_row = row; | |
6206f8ce | 4777 | ++row; |
862b4790 | 4778 | } |
177c0ea7 | 4779 | |
5f5c8ee5 GM |
4780 | if (last_row) |
4781 | { | |
6206f8ce GM |
4782 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
4783 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 4784 | |
b96fd3e8 | 4785 | while (last > start && last->charpos < 0) |
862b4790 | 4786 | --last; |
177c0ea7 | 4787 | |
862b4790 GM |
4788 | for (glyph = start; glyph < last; ++glyph) |
4789 | { | |
4790 | cx += glyph->pixel_width; | |
4791 | ++hpos; | |
4792 | } | |
4793 | ||
5f5c8ee5 | 4794 | cy = last_row->y; |
862b4790 | 4795 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
4796 | } |
4797 | } | |
4798 | } | |
4799 | else | |
4800 | { | |
4801 | cx = w->cursor.x; | |
4802 | cy = w->cursor.y; | |
4803 | hpos = w->cursor.hpos; | |
4804 | vpos = w->cursor.vpos; | |
4805 | } | |
4588ec20 | 4806 | |
5f5c8ee5 GM |
4807 | /* Window cursor can be out of sync for horizontally split windows. */ |
4808 | hpos = max (0, hpos); | |
4809 | hpos = min (w->current_matrix->matrix_w - 1, hpos); | |
4810 | vpos = max (0, vpos); | |
4811 | vpos = min (w->current_matrix->nrows - 1, vpos); | |
4812 | rif->cursor_to (vpos, hpos, cy, cx); | |
4588ec20 | 4813 | } |
4588ec20 | 4814 | |
5f5c8ee5 | 4815 | |
6df5d75f GM |
4816 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window |
4817 | tree rooted at W. */ | |
4818 | ||
4819 | void | |
4820 | set_window_update_flags (w, on_p) | |
4821 | struct window *w; | |
4822 | int on_p; | |
4823 | { | |
4824 | while (w) | |
4825 | { | |
4826 | if (!NILP (w->hchild)) | |
4827 | set_window_update_flags (XWINDOW (w->hchild), on_p); | |
4828 | else if (!NILP (w->vchild)) | |
4829 | set_window_update_flags (XWINDOW (w->vchild), on_p); | |
4830 | else | |
4831 | w->must_be_updated_p = on_p; | |
4832 | ||
4833 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
4834 | } | |
177c0ea7 | 4835 | } |
6df5d75f GM |
4836 | |
4837 | ||
4838 | \f | |
4839 | /*********************************************************************** | |
4840 | Window-Based Scrolling | |
4841 | ***********************************************************************/ | |
4842 | ||
4843 | /* Structure describing rows in scrolling_window. */ | |
4844 | ||
4845 | struct row_entry | |
4846 | { | |
4847 | /* Number of occurrences of this row in desired and current matrix. */ | |
4848 | int old_uses, new_uses; | |
177c0ea7 | 4849 | |
6df5d75f GM |
4850 | /* Vpos of row in new matrix. */ |
4851 | int new_line_number; | |
4852 | ||
4853 | /* Bucket index of this row_entry in the hash table row_table. */ | |
4854 | int bucket; | |
177c0ea7 | 4855 | |
6df5d75f GM |
4856 | /* The row described by this entry. */ |
4857 | struct glyph_row *row; | |
177c0ea7 | 4858 | |
6df5d75f GM |
4859 | /* Hash collision chain. */ |
4860 | struct row_entry *next; | |
4861 | }; | |
4862 | ||
4863 | /* A pool to allocate row_entry structures from, and the size of the | |
4864 | pool. The pool is reallocated in scrolling_window when we find | |
4865 | that we need a larger one. */ | |
4866 | ||
4867 | static struct row_entry *row_entry_pool; | |
4868 | static int row_entry_pool_size; | |
4869 | ||
4870 | /* Index of next free entry in row_entry_pool. */ | |
4871 | ||
4872 | static int row_entry_idx; | |
4873 | ||
4874 | /* The hash table used during scrolling, and the table's size. This | |
4875 | table is used to quickly identify equal rows in the desired and | |
4876 | current matrix. */ | |
4877 | ||
4878 | static struct row_entry **row_table; | |
4879 | static int row_table_size; | |
4880 | ||
4881 | /* Vectors of pointers to row_entry structures belonging to the | |
4882 | current and desired matrix, and the size of the vectors. */ | |
4883 | ||
4884 | static struct row_entry **old_lines, **new_lines; | |
4885 | static int old_lines_size, new_lines_size; | |
4886 | ||
4887 | /* A pool to allocate run structures from, and its size. */ | |
4888 | ||
4889 | static struct run *run_pool; | |
4890 | static int runs_size; | |
4891 | ||
4892 | /* A vector of runs of lines found during scrolling. */ | |
4893 | ||
4894 | static struct run **runs; | |
4895 | ||
6df5d75f GM |
4896 | /* Add glyph row ROW to the scrolling hash table during the scrolling |
4897 | of window W. */ | |
4898 | ||
4899 | static INLINE struct row_entry * | |
4900 | add_row_entry (w, row) | |
4901 | struct window *w; | |
4902 | struct glyph_row *row; | |
4903 | { | |
4904 | struct row_entry *entry; | |
4905 | int i = row->hash % row_table_size; | |
177c0ea7 | 4906 | |
6df5d75f | 4907 | entry = row_table[i]; |
e4e0bee9 | 4908 | while (entry && !row_equal_p (w, entry->row, row, 1)) |
6df5d75f | 4909 | entry = entry->next; |
177c0ea7 | 4910 | |
6df5d75f GM |
4911 | if (entry == NULL) |
4912 | { | |
4913 | entry = row_entry_pool + row_entry_idx++; | |
4914 | entry->row = row; | |
4915 | entry->old_uses = entry->new_uses = 0; | |
4916 | entry->new_line_number = 0; | |
4917 | entry->bucket = i; | |
4918 | entry->next = row_table[i]; | |
4919 | row_table[i] = entry; | |
4920 | } | |
4921 | ||
4922 | return entry; | |
4923 | } | |
4924 | ||
4925 | ||
5f5c8ee5 | 4926 | /* Try to reuse part of the current display of W by scrolling lines. |
153a073c | 4927 | HEADER_LINE_P non-zero means W has a header line. |
5f5c8ee5 GM |
4928 | |
4929 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4930 | Technique for Isolating Differences Between Files." It should take | |
4931 | O(N) time. | |
4932 | ||
4933 | A short outline of the steps of the algorithm | |
4934 | ||
4935 | 1. Skip lines equal at the start and end of both matrices. | |
4936 | ||
4937 | 2. Enter rows in the current and desired matrix into a symbol | |
4938 | table, counting how often they appear in both matrices. | |
4939 | ||
4940 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4941 | i.e. we assume that such lines are likely to have been moved. | |
4942 | ||
4943 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4944 | forward and backward. | |
4945 | ||
4946 | Value is | |
4947 | ||
4948 | -1 if all rows were found to be equal. | |
4949 | 0 to indicate that we did not scroll the display, or | |
4950 | 1 if we did scroll. */ | |
4951 | ||
4952 | static int | |
045dee35 | 4953 | scrolling_window (w, header_line_p) |
5f5c8ee5 | 4954 | struct window *w; |
045dee35 | 4955 | int header_line_p; |
4588ec20 | 4956 | { |
5f5c8ee5 GM |
4957 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4958 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4959 | int yb = window_text_bottom_y (w); | |
6df5d75f GM |
4960 | int i, j, first_old, first_new, last_old, last_new; |
4961 | int nruns, nbytes, n, run_idx; | |
4962 | struct row_entry *entry; | |
fa971ac3 | 4963 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4964 | |
4965 | /* Skip over rows equal at the start. */ | |
bfdcafe1 | 4966 | for (i = header_line_p ? 1 : 0; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4967 | { |
bfdcafe1 GM |
4968 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4969 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4970 | ||
4971 | if (c->enabled_p | |
4972 | && d->enabled_p | |
6b61353c | 4973 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4974 | && c->y == d->y |
4975 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4976 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
4977 | && row_equal_p (w, c, d, 1)) | |
4978 | { | |
4979 | assign_row (c, d); | |
4980 | d->enabled_p = 0; | |
4981 | } | |
4982 | else | |
4983 | break; | |
5f5c8ee5 | 4984 | } |
4588ec20 | 4985 | |
5f5c8ee5 GM |
4986 | /* Give up if some rows in the desired matrix are not enabled. */ |
4987 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4988 | return -1; | |
177c0ea7 | 4989 | |
5f5c8ee5 GM |
4990 | first_old = first_new = i; |
4991 | ||
4992 | /* Set last_new to the index + 1 of the last enabled row in the | |
4993 | desired matrix. */ | |
4994 | i = first_new + 1; | |
4995 | while (i < desired_matrix->nrows - 1 | |
4996 | && MATRIX_ROW (desired_matrix, i)->enabled_p | |
6df5d75f | 4997 | && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)) <= yb) |
5f5c8ee5 GM |
4998 | ++i; |
4999 | ||
5000 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
5001 | return 0; | |
5002 | ||
5003 | last_new = i; | |
5004 | ||
5005 | /* Set last_old to the index + 1 of the last enabled row in the | |
5006 | current matrix. We don't look at the enabled flag here because | |
5007 | we plan to reuse part of the display even if other parts are | |
5008 | disabled. */ | |
5009 | i = first_old + 1; | |
93962bfa GM |
5010 | while (i < current_matrix->nrows - 1) |
5011 | { | |
5012 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
5013 | if (bottom <= yb) | |
5014 | ++i; | |
5015 | if (bottom >= yb) | |
5016 | break; | |
5017 | } | |
5018 | ||
5f5c8ee5 GM |
5019 | last_old = i; |
5020 | ||
5021 | /* Skip over rows equal at the bottom. */ | |
5022 | i = last_new; | |
5023 | j = last_old; | |
5024 | while (i - 1 > first_new | |
5025 | && j - 1 > first_old | |
5026 | && MATRIX_ROW (current_matrix, i - 1)->enabled_p | |
5027 | && (MATRIX_ROW (current_matrix, i - 1)->y | |
5028 | == MATRIX_ROW (desired_matrix, j - 1)->y) | |
6b61353c | 5029 | && !MATRIX_ROW (desired_matrix, j - 1)->redraw_fringe_bitmaps_p |
5f5c8ee5 GM |
5030 | && row_equal_p (w, |
5031 | MATRIX_ROW (desired_matrix, i - 1), | |
e4e0bee9 | 5032 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
5033 | --i, --j; |
5034 | last_new = i; | |
5035 | last_old = j; | |
5036 | ||
5037 | /* Nothing to do if all rows are equal. */ | |
5038 | if (last_new == first_new) | |
5039 | return 0; | |
5040 | ||
6df5d75f | 5041 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 5042 | |
6df5d75f GM |
5043 | if (current_matrix->nrows > old_lines_size) |
5044 | { | |
5045 | old_lines_size = current_matrix->nrows; | |
5046 | nbytes = old_lines_size * sizeof *old_lines; | |
5047 | old_lines = (struct row_entry **) xrealloc (old_lines, nbytes); | |
5048 | } | |
177c0ea7 | 5049 | |
6df5d75f GM |
5050 | if (desired_matrix->nrows > new_lines_size) |
5051 | { | |
5052 | new_lines_size = desired_matrix->nrows; | |
5053 | nbytes = new_lines_size * sizeof *new_lines; | |
5054 | new_lines = (struct row_entry **) xrealloc (new_lines, nbytes); | |
5055 | } | |
5056 | ||
5057 | n = desired_matrix->nrows + current_matrix->nrows; | |
5058 | if (3 * n > row_table_size) | |
5059 | { | |
5060 | row_table_size = next_almost_prime (3 * n); | |
5061 | nbytes = row_table_size * sizeof *row_table; | |
5062 | row_table = (struct row_entry **) xrealloc (row_table, nbytes); | |
5063 | bzero (row_table, nbytes); | |
5064 | } | |
5065 | ||
5066 | if (n > row_entry_pool_size) | |
5067 | { | |
5068 | row_entry_pool_size = n; | |
5069 | nbytes = row_entry_pool_size * sizeof *row_entry_pool; | |
5070 | row_entry_pool = (struct row_entry *) xrealloc (row_entry_pool, nbytes); | |
5071 | } | |
5072 | ||
5073 | if (desired_matrix->nrows > runs_size) | |
5074 | { | |
5075 | runs_size = desired_matrix->nrows; | |
5076 | nbytes = runs_size * sizeof *runs; | |
5077 | runs = (struct run **) xrealloc (runs, nbytes); | |
5078 | nbytes = runs_size * sizeof *run_pool; | |
5079 | run_pool = (struct run *) xrealloc (run_pool, nbytes); | |
5080 | } | |
5081 | ||
5082 | nruns = run_idx = 0; | |
5083 | row_entry_idx = 0; | |
5084 | ||
5085 | /* Add rows from the current and desired matrix to the hash table | |
5086 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 5087 | |
5f5c8ee5 GM |
5088 | for (i = first_old; i < last_old; ++i) |
5089 | { | |
5090 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
5091 | { | |
6df5d75f GM |
5092 | entry = add_row_entry (w, MATRIX_ROW (current_matrix, i)); |
5093 | old_lines[i] = entry; | |
5094 | ++entry->old_uses; | |
5f5c8ee5 GM |
5095 | } |
5096 | else | |
6df5d75f | 5097 | old_lines[i] = NULL; |
5f5c8ee5 GM |
5098 | } |
5099 | ||
5f5c8ee5 GM |
5100 | for (i = first_new; i < last_new; ++i) |
5101 | { | |
5102 | xassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); | |
6df5d75f GM |
5103 | entry = add_row_entry (w, MATRIX_ROW (desired_matrix, i)); |
5104 | ++entry->new_uses; | |
5105 | entry->new_line_number = i; | |
5106 | new_lines[i] = entry; | |
5f5c8ee5 | 5107 | } |
4588ec20 | 5108 | |
5f5c8ee5 GM |
5109 | /* Identify moves based on lines that are unique and equal |
5110 | in both matrices. */ | |
5111 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
5112 | if (old_lines[i] |
5113 | && old_lines[i]->old_uses == 1 | |
5114 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 GM |
5115 | { |
5116 | int j, k; | |
6df5d75f GM |
5117 | int new_line = old_lines[i]->new_line_number; |
5118 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
5119 | |
5120 | /* Record move. */ | |
5121 | run->current_vpos = i; | |
5122 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
5123 | run->desired_vpos = new_line; | |
5124 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
5125 | run->nrows = 1; | |
5126 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
5127 | ||
5128 | /* Extend backward. */ | |
5129 | j = i - 1; | |
5130 | k = new_line - 1; | |
5131 | while (j > first_old | |
5132 | && k > first_new | |
6df5d75f | 5133 | && old_lines[j] == new_lines[k]) |
5f5c8ee5 GM |
5134 | { |
5135 | int h = MATRIX_ROW (current_matrix, j)->height; | |
177c0ea7 JB |
5136 | --run->current_vpos; |
5137 | --run->desired_vpos; | |
5f5c8ee5 GM |
5138 | ++run->nrows; |
5139 | run->height += h; | |
5140 | run->desired_y -= h; | |
5141 | run->current_y -= h; | |
5142 | --j, --k; | |
5143 | } | |
4588ec20 | 5144 | |
5f5c8ee5 GM |
5145 | /* Extend forward. */ |
5146 | j = i + 1; | |
5147 | k = new_line + 1; | |
5148 | while (j < last_old | |
5149 | && k < last_new | |
6df5d75f | 5150 | && old_lines[j] == new_lines[k]) |
5f5c8ee5 GM |
5151 | { |
5152 | int h = MATRIX_ROW (current_matrix, j)->height; | |
177c0ea7 | 5153 | ++run->nrows; |
5f5c8ee5 GM |
5154 | run->height += h; |
5155 | ++j, ++k; | |
5156 | } | |
19dff8dc | 5157 | |
5f5c8ee5 GM |
5158 | /* Insert run into list of all runs. Order runs by copied |
5159 | pixel lines. Note that we record runs that don't have to | |
5160 | be copied because they are already in place. This is done | |
5161 | because we can avoid calling update_window_line in this | |
5162 | case. */ | |
5163 | for (j = 0; j < nruns && runs[j]->height > run->height; ++j) | |
5164 | ; | |
2b4ec4d7 | 5165 | for (k = nruns; k > j; --k) |
5f5c8ee5 GM |
5166 | runs[k] = runs[k - 1]; |
5167 | runs[j] = run; | |
5168 | ++nruns; | |
5169 | ||
5170 | i += run->nrows; | |
5171 | } | |
5172 | else | |
5173 | ++i; | |
4588ec20 | 5174 | |
5f5c8ee5 GM |
5175 | /* Do the moves. Do it in a way that we don't overwrite something |
5176 | we want to copy later on. This is not solvable in general | |
5177 | because there is only one display and we don't have a way to | |
5178 | exchange areas on this display. Example: | |
4588ec20 | 5179 | |
5f5c8ee5 GM |
5180 | +-----------+ +-----------+ |
5181 | | A | | B | | |
5182 | +-----------+ --> +-----------+ | |
5183 | | B | | A | | |
5184 | +-----------+ +-----------+ | |
4588ec20 | 5185 | |
5f5c8ee5 GM |
5186 | Instead, prefer bigger moves, and invalidate moves that would |
5187 | copy from where we copied to. */ | |
ea0d86af | 5188 | |
5f5c8ee5 GM |
5189 | for (i = 0; i < nruns; ++i) |
5190 | if (runs[i]->nrows > 0) | |
5191 | { | |
5192 | struct run *r = runs[i]; | |
24e86043 | 5193 | |
5f5c8ee5 GM |
5194 | /* Copy on the display. */ |
5195 | if (r->current_y != r->desired_y) | |
5196 | { | |
5197 | rif->scroll_run_hook (w, r); | |
5198 | ||
5199 | /* Invalidate runs that copy from where we copied to. */ | |
5200 | for (j = i + 1; j < nruns; ++j) | |
5201 | { | |
5202 | struct run *p = runs[j]; | |
177c0ea7 | 5203 | |
5f5c8ee5 GM |
5204 | if ((p->current_y >= r->desired_y |
5205 | && p->current_y < r->desired_y + r->height) | |
5206 | || (p->current_y + p->height >= r->desired_y | |
5207 | && (p->current_y + p->height | |
5208 | < r->desired_y + r->height))) | |
5209 | p->nrows = 0; | |
5210 | } | |
5211 | } | |
ea0d86af | 5212 | |
5f5c8ee5 GM |
5213 | /* Assign matrix rows. */ |
5214 | for (j = 0; j < r->nrows; ++j) | |
5215 | { | |
5216 | struct glyph_row *from, *to; | |
408f5064 | 5217 | int to_overlapped_p; |
e876ff42 | 5218 | |
5f5c8ee5 GM |
5219 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
5220 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 5221 | to_overlapped_p = to->overlapped_p; |
6b61353c KH |
5222 | if (!from->mode_line_p && !w->pseudo_window_p |
5223 | && (to->left_fringe_bitmap != from->left_fringe_bitmap | |
5224 | || to->right_fringe_bitmap != from->right_fringe_bitmap | |
5225 | || to->left_fringe_face_id != from->left_fringe_face_id | |
5226 | || to->right_fringe_face_id != from->right_fringe_face_id | |
3d4a365f | 5227 | || to->overlay_arrow_bitmap != from->overlay_arrow_bitmap)) |
6b61353c | 5228 | from->redraw_fringe_bitmaps_p = 1; |
5f5c8ee5 GM |
5229 | assign_row (to, from); |
5230 | to->enabled_p = 1, from->enabled_p = 0; | |
408f5064 | 5231 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
5232 | } |
5233 | } | |
15874c59 | 5234 | |
6df5d75f GM |
5235 | /* Clear the hash table, for the next time. */ |
5236 | for (i = 0; i < row_entry_idx; ++i) | |
5237 | row_table[row_entry_pool[i].bucket] = NULL; | |
5238 | ||
6b61353c KH |
5239 | /* Value is > 0 to indicate that we scrolled the display. */ |
5240 | return nruns; | |
5f5c8ee5 | 5241 | } |
de83c314 | 5242 | |
15874c59 | 5243 | |
4588ec20 | 5244 | \f |
5f5c8ee5 GM |
5245 | /************************************************************************ |
5246 | Frame-Based Updates | |
5247 | ************************************************************************/ | |
4588ec20 | 5248 | |
5f5c8ee5 | 5249 | /* Update the desired frame matrix of frame F. |
4588ec20 | 5250 | |
5f5c8ee5 GM |
5251 | FORCE_P non-zero means that the update should not be stopped by |
5252 | pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling | |
5253 | should not be tried. | |
5254 | ||
5255 | Value is non-zero if update was stopped due to pending input. */ | |
5256 | ||
5257 | static int | |
5258 | update_frame_1 (f, force_p, inhibit_id_p) | |
5259 | struct frame *f; | |
5260 | int force_p; | |
5261 | int inhibit_id_p; | |
4588ec20 | 5262 | { |
5f5c8ee5 GM |
5263 | /* Frame matrices to work on. */ |
5264 | struct glyph_matrix *current_matrix = f->current_matrix; | |
5265 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5266 | int i; | |
4588ec20 JB |
5267 | int pause; |
5268 | int preempt_count = baud_rate / 2400 + 1; | |
dfcf069d | 5269 | extern int input_pending; |
5f5c8ee5 GM |
5270 | |
5271 | xassert (current_matrix && desired_matrix); | |
4588ec20 | 5272 | |
c37e4889 RS |
5273 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
5274 | calculate_costs (f); | |
5275 | ||
d88c2b9e RS |
5276 | if (preempt_count <= 0) |
5277 | preempt_count = 1; | |
5278 | ||
a2130dbb KS |
5279 | #if !PERIODIC_PREEMPTION_CHECKING |
5280 | if (!force_p && detect_input_pending_ignore_squeezables ()) | |
4588ec20 JB |
5281 | { |
5282 | pause = 1; | |
5283 | goto do_pause; | |
5284 | } | |
d012c62b | 5285 | #endif |
4588ec20 | 5286 | |
5f5c8ee5 | 5287 | /* If we cannot insert/delete lines, it's no use trying it. */ |
daf01701 | 5288 | if (!FRAME_LINE_INS_DEL_OK (f)) |
5f5c8ee5 | 5289 | inhibit_id_p = 1; |
7098a0fa | 5290 | |
efb859b4 | 5291 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
5292 | i/d line if just want cursor motion. */ |
5293 | for (i = 0; i < desired_matrix->nrows; i++) | |
5294 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
5295 | break; |
5296 | ||
5297 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
5298 | if (!inhibit_id_p && i < desired_matrix->nrows) |
5299 | force_p |= scrolling (f); | |
4588ec20 JB |
5300 | |
5301 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
5302 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
5303 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 5304 | |
5f5c8ee5 GM |
5305 | /* Now update the rest of the lines. */ |
5306 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 5307 | { |
5f5c8ee5 | 5308 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 5309 | { |
b6a65ac2 | 5310 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
5311 | { |
5312 | /* Flush out every so many lines. | |
5313 | Also flush out if likely to have more than 1k buffered | |
5314 | otherwise. I'm told that some telnet connections get | |
5315 | really screwed by more than 1k output at once. */ | |
fced92f1 CY |
5316 | FILE *display_output = FRAME_TTY (f)->output; |
5317 | if (display_output) | |
4588ec20 | 5318 | { |
fced92f1 CY |
5319 | int outq = PENDING_OUTPUT_COUNT (display_output); |
5320 | if (outq > 900 | |
5321 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
4588ec20 | 5322 | { |
fced92f1 CY |
5323 | fflush (display_output); |
5324 | if (preempt_count == 1) | |
5325 | { | |
a41f8bed | 5326 | #ifdef EMACS_OUTQSIZE |
fced92f1 CY |
5327 | if (EMACS_OUTQSIZE (0, &outq) < 0) |
5328 | /* Probably not a tty. Ignore the error and reset | |
5329 | the outq count. */ | |
5330 | outq = PENDING_OUTPUT_COUNT (FRAME_TTY (f->output)); | |
4588ec20 | 5331 | #endif |
fced92f1 CY |
5332 | outq *= 10; |
5333 | if (baud_rate <= outq && baud_rate > 0) | |
5334 | sleep (outq / baud_rate); | |
5335 | } | |
4588ec20 JB |
5336 | } |
5337 | } | |
4588ec20 JB |
5338 | } |
5339 | ||
d012c62b KS |
5340 | #if PERIODIC_PREEMPTION_CHECKING |
5341 | if (!force_p) | |
5342 | { | |
5343 | EMACS_TIME tm, dif; | |
5344 | EMACS_GET_TIME (tm); | |
5345 | EMACS_SUB_TIME (dif, preemption_next_check, tm); | |
5346 | if (EMACS_TIME_NEG_P (dif)) | |
5347 | { | |
5348 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
5349 | if (detect_input_pending_ignore_squeezables ()) |
5350 | break; | |
d012c62b KS |
5351 | } |
5352 | } | |
5353 | #else | |
5354 | if (!force_p && (i - 1) % preempt_count == 0) | |
a2d5fca0 | 5355 | detect_input_pending_ignore_squeezables (); |
d012c62b | 5356 | #endif |
a2960116 | 5357 | |
5f5c8ee5 | 5358 | update_frame_line (f, i); |
4588ec20 | 5359 | } |
4588ec20 | 5360 | } |
177c0ea7 | 5361 | |
7df02016 | 5362 | pause = (i < FRAME_LINES (f) - 1) ? i : 0; |
4588ec20 JB |
5363 | |
5364 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
5365 | if (!pause) | |
5366 | { | |
48cf7030 | 5367 | if ((cursor_in_echo_area |
5f5c8ee5 | 5368 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 5369 | show the cursor for the message instead of for the |
5f5c8ee5 | 5370 | (now hidden) mini-buffer contents. */ |
2577053b RS |
5371 | || (EQ (minibuf_window, selected_window) |
5372 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 5373 | && !NILP (echo_area_buffer[0]))) |
2577053b | 5374 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 5375 | the active mini-buffer window. */ |
2577053b | 5376 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 5377 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 5378 | { |
7df02016 | 5379 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
5380 | int row, col; |
5381 | ||
5382 | if (cursor_in_echo_area < 0) | |
5383 | { | |
5f5c8ee5 GM |
5384 | /* Negative value of cursor_in_echo_area means put |
5385 | cursor at beginning of line. */ | |
648fa17d JB |
5386 | row = top; |
5387 | col = 0; | |
5388 | } | |
1113d9db | 5389 | else |
648fa17d | 5390 | { |
5f5c8ee5 GM |
5391 | /* Positive value of cursor_in_echo_area means put |
5392 | cursor at the end of the prompt. If the mini-buffer | |
5393 | is several lines high, find the last line that has | |
5394 | any text on it. */ | |
7df02016 | 5395 | row = FRAME_LINES (f); |
177c0ea7 | 5396 | do |
648fa17d | 5397 | { |
5f5c8ee5 GM |
5398 | --row; |
5399 | col = 0; | |
177c0ea7 | 5400 | |
5f5c8ee5 GM |
5401 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
5402 | { | |
5403 | /* Frame rows are filled up with spaces that | |
5404 | must be ignored here. */ | |
5f5c8ee5 GM |
5405 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
5406 | row); | |
5407 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
5408 | struct glyph *last = start + r->used[TEXT_AREA]; | |
5409 | ||
5410 | while (last > start | |
5411 | && (last - 1)->charpos < 0) | |
5412 | --last; | |
177c0ea7 | 5413 | |
5f5c8ee5 GM |
5414 | col = last - start; |
5415 | } | |
648fa17d JB |
5416 | } |
5417 | while (row > top && col == 0); | |
5418 | ||
6395da5c | 5419 | /* Make sure COL is not out of range. */ |
868e640e | 5420 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 5421 | { |
6395da5c | 5422 | /* If we have another row, advance cursor into it. */ |
7df02016 | 5423 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 5424 | { |
7df02016 | 5425 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
5426 | row++; |
5427 | } | |
5428 | /* Otherwise move it back in range. */ | |
5429 | else | |
868e640e | 5430 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
5431 | } |
5432 | } | |
5433 | ||
385ed61f | 5434 | cursor_to (f, row, col); |
1113d9db | 5435 | } |
4588ec20 | 5436 | else |
5f5c8ee5 GM |
5437 | { |
5438 | /* We have only one cursor on terminal frames. Use it to | |
5439 | display the cursor of the selected window. */ | |
5440 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
5441 | if (w->cursor.vpos >= 0 |
5442 | /* The cursor vpos may be temporarily out of bounds | |
5443 | in the following situation: There is one window, | |
5444 | with the cursor in the lower half of it. The window | |
5445 | is split, and a message causes a redisplay before | |
5446 | a new cursor position has been computed. */ | |
7df02016 | 5447 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
5448 | { |
5449 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
5450 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
5451 | ||
7df02016 KS |
5452 | if (INTEGERP (w->left_margin_cols)) |
5453 | x += XFASTINT (w->left_margin_cols); | |
177c0ea7 | 5454 | |
7df02016 | 5455 | /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */ |
385ed61f | 5456 | cursor_to (f, y, x); |
5f5c8ee5 GM |
5457 | } |
5458 | } | |
4588ec20 JB |
5459 | } |
5460 | ||
4588ec20 JB |
5461 | do_pause: |
5462 | ||
5f5c8ee5 | 5463 | clear_desired_matrices (f); |
4588ec20 JB |
5464 | return pause; |
5465 | } | |
5466 | ||
4588ec20 | 5467 | |
5f5c8ee5 | 5468 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 5469 | |
dfcf069d | 5470 | int |
502b9b64 | 5471 | scrolling (frame) |
5f5c8ee5 | 5472 | struct frame *frame; |
4588ec20 JB |
5473 | { |
5474 | int unchanged_at_top, unchanged_at_bottom; | |
5475 | int window_size; | |
5476 | int changed_lines; | |
7df02016 KS |
5477 | int *old_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); |
5478 | int *new_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
5479 | int *draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
5480 | int *old_draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 5481 | register int i; |
7df02016 | 5482 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
5483 | struct glyph_matrix *current_matrix = frame->current_matrix; |
5484 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 5485 | |
5f5c8ee5 GM |
5486 | if (!current_matrix) |
5487 | abort (); | |
4588ec20 | 5488 | |
5f5c8ee5 GM |
5489 | /* Compute hash codes of all the lines. Also calculate number of |
5490 | changed lines, number of unchanged lines at the beginning, and | |
5491 | number of unchanged lines at the end. */ | |
4588ec20 JB |
5492 | changed_lines = 0; |
5493 | unchanged_at_top = 0; | |
7df02016 KS |
5494 | unchanged_at_bottom = FRAME_LINES (frame); |
5495 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
5496 | { |
5497 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 5498 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 5499 | return 0; |
5f5c8ee5 GM |
5500 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
5501 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
5502 | { |
5503 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
5504 | new_hash[i] = old_hash[i]; | |
5505 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
5506 | draw_cost[i] = INFINITY; | |
5507 | } | |
4588ec20 | 5508 | else |
f188b3c4 | 5509 | { |
5f5c8ee5 GM |
5510 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
5511 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 5512 | } |
4588ec20 JB |
5513 | |
5514 | if (old_hash[i] != new_hash[i]) | |
5515 | { | |
5516 | changed_lines++; | |
7df02016 | 5517 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
5518 | } |
5519 | else if (i == unchanged_at_top) | |
5520 | unchanged_at_top++; | |
5f5c8ee5 | 5521 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
5522 | } |
5523 | ||
5524 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
daf01701 | 5525 | if ((!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 5526 | && changed_lines < baud_rate / 2400) |
7df02016 | 5527 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
5528 | return 1; |
5529 | ||
7df02016 | 5530 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
5531 | - unchanged_at_bottom); |
5532 | ||
daf01701 | 5533 | if (FRAME_SCROLL_REGION_OK (frame)) |
4588ec20 | 5534 | free_at_end_vpos -= unchanged_at_bottom; |
daf01701 | 5535 | else if (FRAME_MEMORY_BELOW_FRAME (frame)) |
4588ec20 JB |
5536 | free_at_end_vpos = -1; |
5537 | ||
5538 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 5539 | current frame and desired frame, don't bother with i/d calc. */ |
daf01701 | 5540 | if (!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 5541 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
5542 | && (window_size >= |
5543 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 5544 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
5545 | old_hash, new_hash, draw_cost))) |
5546 | return 0; | |
5547 | ||
5f5c8ee5 GM |
5548 | if (window_size < 2) |
5549 | return 0; | |
5550 | ||
502b9b64 | 5551 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 5552 | draw_cost + unchanged_at_top - 1, |
190bb91a | 5553 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
5554 | old_hash + unchanged_at_top - 1, |
5555 | new_hash + unchanged_at_top - 1, | |
5556 | free_at_end_vpos - unchanged_at_top); | |
5557 | ||
5558 | return 0; | |
5559 | } | |
4588ec20 | 5560 | |
4588ec20 | 5561 | |
5f5c8ee5 GM |
5562 | /* Count the number of blanks at the start of the vector of glyphs R |
5563 | which is LEN glyphs long. */ | |
4588ec20 | 5564 | |
4588ec20 | 5565 | static int |
5f5c8ee5 GM |
5566 | count_blanks (r, len) |
5567 | struct glyph *r; | |
5568 | int len; | |
4588ec20 | 5569 | { |
5f5c8ee5 | 5570 | int i; |
177c0ea7 | 5571 | |
5f5c8ee5 GM |
5572 | for (i = 0; i < len; ++i) |
5573 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
5574 | break; | |
5575 | ||
5576 | return i; | |
4588ec20 JB |
5577 | } |
5578 | ||
5f5c8ee5 GM |
5579 | |
5580 | /* Count the number of glyphs in common at the start of the glyph | |
5581 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
5582 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
5583 | ||
4588ec20 | 5584 | static int |
5f5c8ee5 GM |
5585 | count_match (str1, end1, str2, end2) |
5586 | struct glyph *str1, *end1, *str2, *end2; | |
4588ec20 | 5587 | { |
5f5c8ee5 GM |
5588 | struct glyph *p1 = str1; |
5589 | struct glyph *p2 = str2; | |
177c0ea7 | 5590 | |
5f5c8ee5 GM |
5591 | while (p1 < end1 |
5592 | && p2 < end2 | |
42186983 | 5593 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 5594 | ++p1, ++p2; |
177c0ea7 | 5595 | |
5f5c8ee5 | 5596 | return p1 - str1; |
4588ec20 JB |
5597 | } |
5598 | ||
5f5c8ee5 | 5599 | |
4588ec20 | 5600 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 5601 | |
5f5c8ee5 | 5602 | extern int *char_ins_del_vector; |
7df02016 | 5603 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))]) |
4588ec20 | 5604 | |
5f5c8ee5 GM |
5605 | |
5606 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
5607 | ||
4588ec20 | 5608 | static void |
c363a1d6 GM |
5609 | update_frame_line (f, vpos) |
5610 | struct frame *f; | |
4588ec20 JB |
5611 | int vpos; |
5612 | { | |
5f5c8ee5 | 5613 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
5614 | int tem; |
5615 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
5616 | struct glyph_matrix *current_matrix = f->current_matrix; |
5617 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
5618 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
5619 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
5620 | int must_write_whole_line_p; | |
daf01701 | 5621 | int write_spaces_p = FRAME_MUST_WRITE_SPACES (f); |
c363a1d6 | 5622 | int colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background |
0a894bad GM |
5623 | != FACE_TTY_DEFAULT_BG_COLOR); |
5624 | ||
5625 | if (colored_spaces_p) | |
5626 | write_spaces_p = 1; | |
5f5c8ee5 | 5627 | |
26c63686 GM |
5628 | /* Current row not enabled means it has unknown contents. We must |
5629 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
5630 | must_write_whole_line_p = !current_row->enabled_p; |
5631 | if (must_write_whole_line_p) | |
4588ec20 | 5632 | { |
5f5c8ee5 | 5633 | obody = 0; |
4588ec20 JB |
5634 | olen = 0; |
5635 | } | |
5636 | else | |
5637 | { | |
5f5c8ee5 GM |
5638 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
5639 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 5640 | |
4cecaab8 MB |
5641 | /* Ignore trailing spaces, if we can. */ |
5642 | if (!write_spaces_p) | |
5643 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
5644 | olen--; | |
4588ec20 JB |
5645 | } |
5646 | ||
5f5c8ee5 GM |
5647 | current_row->enabled_p = 1; |
5648 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 5649 | |
5f5c8ee5 GM |
5650 | /* If desired line is empty, just clear the line. */ |
5651 | if (!desired_row->enabled_p) | |
4588ec20 JB |
5652 | { |
5653 | nlen = 0; | |
5654 | goto just_erase; | |
5655 | } | |
5656 | ||
5f5c8ee5 GM |
5657 | nbody = desired_row->glyphs[TEXT_AREA]; |
5658 | nlen = desired_row->used[TEXT_AREA]; | |
5659 | nend = nbody + nlen; | |
5660 | ||
5661 | /* If display line has unknown contents, write the whole line. */ | |
5662 | if (must_write_whole_line_p) | |
5663 | { | |
26c63686 | 5664 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 5665 | if (!write_spaces_p) |
74ca462f GM |
5666 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
5667 | --nlen; | |
5668 | ||
26c63686 | 5669 | /* Write the contents of the desired line. */ |
74ca462f | 5670 | if (nlen) |
26c63686 | 5671 | { |
385ed61f KL |
5672 | cursor_to (f, vpos, 0); |
5673 | write_glyphs (f, nbody, nlen); | |
26c63686 | 5674 | } |
177c0ea7 | 5675 | |
26c63686 GM |
5676 | /* Don't call clear_end_of_line if we already wrote the whole |
5677 | line. The cursor will not be at the right margin in that | |
5678 | case but in the line below. */ | |
7df02016 | 5679 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 | 5680 | { |
385ed61f KL |
5681 | cursor_to (f, vpos, nlen); |
5682 | clear_end_of_line (f, FRAME_TOTAL_COLS (f)); | |
26c63686 | 5683 | } |
58827478 GM |
5684 | else |
5685 | /* Make sure we are in the right row, otherwise cursor movement | |
5686 | with cmgoto might use `ch' in the wrong row. */ | |
385ed61f | 5687 | cursor_to (f, vpos, 0); |
177c0ea7 | 5688 | |
5f5c8ee5 GM |
5689 | make_current (desired_matrix, current_matrix, vpos); |
5690 | return; | |
5691 | } | |
4588ec20 JB |
5692 | |
5693 | /* Pretend trailing spaces are not there at all, | |
5694 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
5695 | if (!write_spaces_p) |
5696 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
5697 | nlen--; | |
4588ec20 JB |
5698 | |
5699 | /* If there's no i/d char, quickly do the best we can without it. */ | |
daf01701 | 5700 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
4588ec20 | 5701 | { |
5f5c8ee5 | 5702 | int i, j; |
4588ec20 | 5703 | |
5f5c8ee5 GM |
5704 | /* Find the first glyph in desired row that doesn't agree with |
5705 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
5706 | for (i = 0; i < nlen; i++) |
5707 | { | |
5f5c8ee5 | 5708 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 5709 | { |
5f5c8ee5 GM |
5710 | /* Find the end of the run of different glyphs. */ |
5711 | j = i + 1; | |
5712 | while (j < nlen | |
5713 | && (j >= olen | |
5714 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
5715 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
5716 | ++j; | |
177c0ea7 JB |
5717 | |
5718 | /* Output this run of non-matching chars. */ | |
385ed61f KL |
5719 | cursor_to (f, vpos, i); |
5720 | write_glyphs (f, nbody + i, j - i); | |
5f5c8ee5 | 5721 | i = j - 1; |
4588ec20 JB |
5722 | |
5723 | /* Now find the next non-match. */ | |
5724 | } | |
5725 | } | |
5726 | ||
5727 | /* Clear the rest of the line, or the non-clear part of it. */ | |
5728 | if (olen > nlen) | |
5729 | { | |
385ed61f KL |
5730 | cursor_to (f, vpos, nlen); |
5731 | clear_end_of_line (f, olen); | |
4588ec20 JB |
5732 | } |
5733 | ||
5f5c8ee5 GM |
5734 | /* Make current row = desired row. */ |
5735 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
5736 | return; |
5737 | } | |
5738 | ||
5f5c8ee5 GM |
5739 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
5740 | characters in a row. */ | |
5741 | ||
4588ec20 JB |
5742 | if (!olen) |
5743 | { | |
5f5c8ee5 GM |
5744 | /* If current line is blank, skip over initial spaces, if |
5745 | possible, and write the rest. */ | |
4cecaab8 | 5746 | if (write_spaces_p) |
5f5c8ee5 GM |
5747 | nsp = 0; |
5748 | else | |
5749 | nsp = count_blanks (nbody, nlen); | |
5750 | ||
4588ec20 JB |
5751 | if (nlen > nsp) |
5752 | { | |
385ed61f KL |
5753 | cursor_to (f, vpos, nsp); |
5754 | write_glyphs (f, nbody + nsp, nlen - nsp); | |
4588ec20 JB |
5755 | } |
5756 | ||
502b9b64 | 5757 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 5758 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
5759 | return; |
5760 | } | |
5761 | ||
4588ec20 | 5762 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 5763 | osp = count_blanks (obody, olen); |
4cecaab8 | 5764 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 5765 | |
5f5c8ee5 GM |
5766 | /* Compute number of matching chars starting with first non-blank. */ |
5767 | begmatch = count_match (obody + osp, obody + olen, | |
5768 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
5769 | |
5770 | /* Spaces in new match implicit space past the end of old. */ | |
5771 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 5772 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
5773 | { |
5774 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
5775 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
5776 | ++begmatch; | |
4588ec20 JB |
5777 | } |
5778 | ||
5779 | /* Avoid doing insert/delete char | |
5780 | just cause number of leading spaces differs | |
5f5c8ee5 | 5781 | when the following text does not match. */ |
4588ec20 JB |
5782 | if (begmatch == 0 && osp != nsp) |
5783 | osp = nsp = min (osp, nsp); | |
5784 | ||
5785 | /* Find matching characters at end of line */ | |
5786 | op1 = obody + olen; | |
5787 | np1 = nbody + nlen; | |
5788 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
5789 | while (op1 > op2 |
5790 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
5791 | { |
5792 | op1--; | |
5793 | np1--; | |
5794 | } | |
5795 | endmatch = obody + olen - op1; | |
5796 | ||
4588ec20 JB |
5797 | /* tem gets the distance to insert or delete. |
5798 | endmatch is how many characters we save by doing so. | |
5799 | Is it worth it? */ | |
5800 | ||
5801 | tem = (nlen - nsp) - (olen - osp); | |
5802 | if (endmatch && tem | |
daf01701 | 5803 | && (!FRAME_CHAR_INS_DEL_OK (f) |
8a56675d | 5804 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
5805 | endmatch = 0; |
5806 | ||
5807 | /* nsp - osp is the distance to insert or delete. | |
5808 | If that is nonzero, begmatch is known to be nonzero also. | |
5809 | begmatch + endmatch is how much we save by doing the ins/del. | |
5810 | Is it worth it? */ | |
5811 | ||
5812 | if (nsp != osp | |
daf01701 | 5813 | && (!FRAME_CHAR_INS_DEL_OK (f) |
c363a1d6 | 5814 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
5815 | { |
5816 | begmatch = 0; | |
5817 | endmatch = 0; | |
5818 | osp = nsp = min (osp, nsp); | |
5819 | } | |
5820 | ||
5821 | /* Now go through the line, inserting, writing and | |
5822 | deleting as appropriate. */ | |
5823 | ||
5824 | if (osp > nsp) | |
5825 | { | |
385ed61f KL |
5826 | cursor_to (f, vpos, nsp); |
5827 | delete_glyphs (f, osp - nsp); | |
4588ec20 JB |
5828 | } |
5829 | else if (nsp > osp) | |
5830 | { | |
5831 | /* If going to delete chars later in line | |
5832 | and insert earlier in the line, | |
5833 | must delete first to avoid losing data in the insert */ | |
5834 | if (endmatch && nlen < olen + nsp - osp) | |
5835 | { | |
385ed61f KL |
5836 | cursor_to (f, vpos, nlen - endmatch + osp - nsp); |
5837 | delete_glyphs (f, olen + nsp - osp - nlen); | |
4588ec20 JB |
5838 | olen = nlen - (nsp - osp); |
5839 | } | |
385ed61f KL |
5840 | cursor_to (f, vpos, osp); |
5841 | insert_glyphs (f, 0, nsp - osp); | |
4588ec20 JB |
5842 | } |
5843 | olen += nsp - osp; | |
5844 | ||
5845 | tem = nsp + begmatch + endmatch; | |
5846 | if (nlen != tem || olen != tem) | |
5847 | { | |
4588ec20 JB |
5848 | if (!endmatch || nlen == olen) |
5849 | { | |
c363a1d6 GM |
5850 | /* If new text being written reaches right margin, there is |
5851 | no need to do clear-to-eol at the end of this function | |
5852 | (and it would not be safe, since cursor is not going to | |
5853 | be "at the margin" after the text is done). */ | |
7df02016 | 5854 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 5855 | olen = 0; |
c363a1d6 GM |
5856 | |
5857 | /* Function write_glyphs is prepared to do nothing | |
5858 | if passed a length <= 0. Check it here to avoid | |
5859 | unnecessary cursor movement. */ | |
5860 | if (nlen - tem > 0) | |
5861 | { | |
385ed61f KL |
5862 | cursor_to (f, vpos, nsp + begmatch); |
5863 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
c363a1d6 | 5864 | } |
4588ec20 JB |
5865 | } |
5866 | else if (nlen > olen) | |
5867 | { | |
24e86043 KH |
5868 | /* Here, we used to have the following simple code: |
5869 | ---------------------------------------- | |
5870 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
5871 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
5872 | ---------------------------------------- | |
5873 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
5874 | is a padding glyph. */ | |
5875 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
5876 | int del; | |
5f5c8ee5 | 5877 | |
385ed61f | 5878 | cursor_to (f, vpos, nsp + begmatch); |
177c0ea7 | 5879 | |
5f5c8ee5 | 5880 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
5881 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
5882 | out--; | |
385ed61f | 5883 | write_glyphs (f, nbody + nsp + begmatch, out); |
177c0ea7 | 5884 | |
5f5c8ee5 GM |
5885 | /* If we left columns to be overwritten, we must delete them. */ |
5886 | del = olen - tem - out; | |
c363a1d6 | 5887 | if (del > 0) |
385ed61f | 5888 | delete_glyphs (f, del); |
177c0ea7 | 5889 | |
5f5c8ee5 | 5890 | /* At last, we insert columns not yet written out. */ |
385ed61f | 5891 | insert_glyphs (f, nbody + nsp + begmatch + out, nlen - olen + del); |
5f5c8ee5 GM |
5892 | olen = nlen; |
5893 | } | |
5894 | else if (olen > nlen) | |
5895 | { | |
385ed61f KL |
5896 | cursor_to (f, vpos, nsp + begmatch); |
5897 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
5898 | delete_glyphs (f, olen - nlen); | |
5f5c8ee5 GM |
5899 | olen = nlen; |
5900 | } | |
bd9e3e75 | 5901 | } |
5f5c8ee5 GM |
5902 | |
5903 | just_erase: | |
5904 | /* If any unerased characters remain after the new line, erase them. */ | |
5905 | if (olen > nlen) | |
078b3696 | 5906 | { |
385ed61f KL |
5907 | cursor_to (f, vpos, nlen); |
5908 | clear_end_of_line (f, olen); | |
078b3696 | 5909 | } |
5f5c8ee5 GM |
5910 | |
5911 | /* Exchange contents between current_frame and new_frame. */ | |
5912 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5913 | } |
5f5c8ee5 GM |
5914 | |
5915 | ||
078b3696 | 5916 | \f |
5f5c8ee5 GM |
5917 | /*********************************************************************** |
5918 | X/Y Position -> Buffer Position | |
5919 | ***********************************************************************/ | |
5920 | ||
a1b0a6db | 5921 | /* Determine what's under window-relative pixel position (*X, *Y). |
6b61353c KH |
5922 | Return the object (string or buffer) that's there. |
5923 | Return in *POS the position in that object. | |
5924 | Adjust *X and *Y to character positions. */ | |
5f5c8ee5 | 5925 | |
6b61353c KH |
5926 | Lisp_Object |
5927 | buffer_posn_from_coords (w, x, y, pos, object, dx, dy, width, height) | |
5f5c8ee5 GM |
5928 | struct window *w; |
5929 | int *x, *y; | |
a1b0a6db | 5930 | struct display_pos *pos; |
6b61353c KH |
5931 | Lisp_Object *object; |
5932 | int *dx, *dy; | |
5933 | int *width, *height; | |
4588ec20 | 5934 | { |
5f5c8ee5 | 5935 | struct it it; |
707ea971 | 5936 | Lisp_Object old_current_buffer = Fcurrent_buffer (); |
5f5c8ee5 | 5937 | struct text_pos startp; |
6b61353c KH |
5938 | Lisp_Object string; |
5939 | struct glyph_row *row; | |
cedd7cd9 KS |
5940 | #ifdef HAVE_WINDOW_SYSTEM |
5941 | struct image *img = 0; | |
5942 | #endif | |
6b61353c | 5943 | int x0, x1; |
5f5c8ee5 | 5944 | |
707ea971 CY |
5945 | /* We used to set current_buffer directly here, but that does the |
5946 | wrong thing with `face-remapping-alist' (bug#2044). */ | |
5947 | Fset_buffer (w->buffer); | |
5f5c8ee5 GM |
5948 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
5949 | CHARPOS (startp) = min (ZV, max (BEGV, CHARPOS (startp))); | |
5950 | BYTEPOS (startp) = min (ZV_BYTE, max (BEGV_BYTE, BYTEPOS (startp))); | |
5951 | start_display (&it, w, startp); | |
177c0ea7 | 5952 | |
6b61353c KH |
5953 | x0 = *x - WINDOW_LEFT_MARGIN_WIDTH (w); |
5954 | move_it_to (&it, -1, x0 + it.first_visible_x, *y, -1, | |
5f5c8ee5 | 5955 | MOVE_TO_X | MOVE_TO_Y); |
177c0ea7 | 5956 | |
707ea971 | 5957 | Fset_buffer (old_current_buffer); |
a1b0a6db | 5958 | |
6b61353c KH |
5959 | *dx = x0 + it.first_visible_x - it.current_x; |
5960 | *dy = *y - it.current_y; | |
5961 | ||
5962 | string = w->buffer; | |
5963 | if (STRINGP (it.string)) | |
5964 | string = it.string; | |
a1b0a6db | 5965 | *pos = it.current; |
6b61353c KH |
5966 | |
5967 | #ifdef HAVE_WINDOW_SYSTEM | |
5968 | if (it.what == IT_IMAGE) | |
5969 | { | |
6b61353c KH |
5970 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5971 | && !NILP (img->spec)) | |
5972 | *object = img->spec; | |
5973 | } | |
5974 | #endif | |
5975 | ||
b70d98e1 KS |
5976 | if (it.vpos < w->current_matrix->nrows |
5977 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5978 | row->enabled_p)) | |
6b61353c KH |
5979 | { |
5980 | if (it.hpos < row->used[TEXT_AREA]) | |
5981 | { | |
5982 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6b61353c | 5983 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5984 | if (img) |
5985 | { | |
5986 | *dy -= row->ascent - glyph->ascent; | |
5987 | *dx += glyph->slice.x; | |
5988 | *dy += glyph->slice.y; | |
5989 | /* Image slices positions are still relative to the entire image */ | |
5990 | *width = img->width; | |
5991 | *height = img->height; | |
5992 | } | |
5993 | else | |
6b61353c | 5994 | #endif |
cedd7cd9 KS |
5995 | { |
5996 | *width = glyph->pixel_width; | |
5997 | *height = glyph->ascent + glyph->descent; | |
5998 | } | |
6b61353c KH |
5999 | } |
6000 | else | |
6001 | { | |
6002 | *width = 0; | |
6003 | *height = row->height; | |
6004 | } | |
6005 | } | |
6006 | else | |
6007 | { | |
6008 | *width = *height = 0; | |
6009 | } | |
6010 | ||
6011 | /* Add extra (default width) columns if clicked after EOL. */ | |
6012 | x1 = max(0, it.current_x + it.pixel_width - it.first_visible_x); | |
6013 | if (x0 > x1) | |
6014 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
6015 | ||
6016 | *x = it.hpos; | |
6017 | *y = it.vpos; | |
6018 | ||
6019 | return string; | |
5f5c8ee5 | 6020 | } |
4588ec20 | 6021 | |
5f5c8ee5 GM |
6022 | |
6023 | /* Value is the string under window-relative coordinates X/Y in the | |
6b61353c KH |
6024 | mode line or header line (PART says which) of window W, or nil if none. |
6025 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
6026 | |
6027 | Lisp_Object | |
6b61353c | 6028 | mode_line_string (w, part, x, y, charpos, object, dx, dy, width, height) |
5f5c8ee5 | 6029 | struct window *w; |
641bdbf3 | 6030 | enum window_part part; |
6b61353c | 6031 | int *x, *y; |
5f5c8ee5 | 6032 | int *charpos; |
6b61353c KH |
6033 | Lisp_Object *object; |
6034 | int *dx, *dy; | |
6035 | int *width, *height; | |
5f5c8ee5 GM |
6036 | { |
6037 | struct glyph_row *row; | |
6038 | struct glyph *glyph, *end; | |
6b61353c | 6039 | int x0, y0; |
5f5c8ee5 GM |
6040 | Lisp_Object string = Qnil; |
6041 | ||
641bdbf3 | 6042 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
6043 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
6044 | else | |
045dee35 | 6045 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
6b61353c KH |
6046 | y0 = *y - row->y; |
6047 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
5f5c8ee5 GM |
6048 | |
6049 | if (row->mode_line_p && row->enabled_p) | |
4588ec20 | 6050 | { |
5f5c8ee5 GM |
6051 | /* Find the glyph under X. If we find one with a string object, |
6052 | it's the one we were looking for. */ | |
6053 | glyph = row->glyphs[TEXT_AREA]; | |
6054 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 6055 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
6056 | x0 -= glyph->pixel_width; |
6057 | *x = glyph - row->glyphs[TEXT_AREA]; | |
6058 | if (glyph < end) | |
6059 | { | |
6060 | string = glyph->object; | |
6061 | *charpos = glyph->charpos; | |
6062 | *width = glyph->pixel_width; | |
6063 | *height = glyph->ascent + glyph->descent; | |
6064 | #ifdef HAVE_WINDOW_SYSTEM | |
6065 | if (glyph->type == IMAGE_GLYPH) | |
6066 | { | |
6067 | struct image *img; | |
6068 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
6069 | if (img != NULL) | |
6070 | *object = img->spec; | |
6071 | y0 -= row->ascent - glyph->ascent; | |
6072 | } | |
6073 | #endif | |
6074 | } | |
6075 | else | |
6076 | { | |
6077 | /* Add extra (default width) columns if clicked after EOL. */ | |
6078 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
6079 | *width = 0; | |
6080 | *height = row->height; | |
6081 | } | |
6082 | } | |
6083 | else | |
6084 | { | |
6085 | *x = 0; | |
6086 | x0 = 0; | |
6087 | *width = *height = 0; | |
4588ec20 | 6088 | } |
5f5c8ee5 | 6089 | |
6b61353c KH |
6090 | *dx = x0; |
6091 | *dy = y0; | |
6092 | ||
5f5c8ee5 | 6093 | return string; |
4588ec20 | 6094 | } |
5f5c8ee5 GM |
6095 | |
6096 | ||
db1db309 GM |
6097 | /* Value is the string under window-relative coordinates X/Y in either |
6098 | marginal area, or nil if none. *CHARPOS is set to the position in | |
6099 | the string returned. */ | |
6100 | ||
6101 | Lisp_Object | |
6b61353c | 6102 | marginal_area_string (w, part, x, y, charpos, object, dx, dy, width, height) |
db1db309 | 6103 | struct window *w; |
641bdbf3 | 6104 | enum window_part part; |
6b61353c | 6105 | int *x, *y; |
521069b9 | 6106 | int *charpos; |
6b61353c KH |
6107 | Lisp_Object *object; |
6108 | int *dx, *dy; | |
6109 | int *width, *height; | |
db1db309 GM |
6110 | { |
6111 | struct glyph_row *row = w->current_matrix->rows; | |
6112 | struct glyph *glyph, *end; | |
6b61353c | 6113 | int x0, y0, i, wy = *y; |
641bdbf3 | 6114 | int area; |
db1db309 GM |
6115 | Lisp_Object string = Qnil; |
6116 | ||
641bdbf3 | 6117 | if (part == ON_LEFT_MARGIN) |
db1db309 | 6118 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 6119 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
6120 | area = RIGHT_MARGIN_AREA; |
6121 | else | |
6122 | abort (); | |
6123 | ||
6124 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
6125 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
6126 | break; | |
6b61353c KH |
6127 | y0 = *y - row->y; |
6128 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
db1db309 GM |
6129 | |
6130 | if (row->enabled_p) | |
6131 | { | |
6132 | /* Find the glyph under X. If we find one with a string object, | |
6133 | it's the one we were looking for. */ | |
db1db309 | 6134 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 6135 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 6136 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
6137 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) |
6138 | + window_box_width (w, LEFT_MARGIN_AREA) | |
6139 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 6140 | else |
7df02016 | 6141 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 6142 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
6143 | : 0); |
6144 | ||
6b61353c KH |
6145 | glyph = row->glyphs[area]; |
6146 | end = glyph + row->used[area]; | |
cfde341f | 6147 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
6148 | x0 -= glyph->pixel_width; |
6149 | *x = glyph - row->glyphs[area]; | |
6150 | if (glyph < end) | |
6151 | { | |
6152 | string = glyph->object; | |
6153 | *charpos = glyph->charpos; | |
6154 | *width = glyph->pixel_width; | |
6155 | *height = glyph->ascent + glyph->descent; | |
6156 | #ifdef HAVE_WINDOW_SYSTEM | |
6157 | if (glyph->type == IMAGE_GLYPH) | |
6158 | { | |
6159 | struct image *img; | |
6160 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
6161 | if (img != NULL) | |
6162 | *object = img->spec; | |
6163 | y0 -= row->ascent - glyph->ascent; | |
cedd7cd9 KS |
6164 | x0 += glyph->slice.x; |
6165 | y0 += glyph->slice.y; | |
6b61353c KH |
6166 | } |
6167 | #endif | |
6168 | } | |
6169 | else | |
6170 | { | |
6171 | /* Add extra (default width) columns if clicked after EOL. */ | |
6172 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
6173 | *width = 0; | |
6174 | *height = row->height; | |
6175 | } | |
db1db309 | 6176 | } |
6b61353c KH |
6177 | else |
6178 | { | |
6179 | x0 = 0; | |
6180 | *x = 0; | |
6181 | *width = *height = 0; | |
6182 | } | |
6183 | ||
6184 | *dx = x0; | |
6185 | *dy = y0; | |
db1db309 GM |
6186 | |
6187 | return string; | |
6188 | } | |
6189 | ||
6190 | ||
5f5c8ee5 GM |
6191 | /*********************************************************************** |
6192 | Changing Frame Sizes | |
6193 | ***********************************************************************/ | |
4588ec20 JB |
6194 | |
6195 | #ifdef SIGWINCH | |
5f5c8ee5 | 6196 | |
efb859b4 | 6197 | SIGTYPE |
61cbef47 | 6198 | window_change_signal (signalnum) /* If we don't have an argument, */ |
5f5c8ee5 | 6199 | int signalnum; /* some compilers complain in signal calls. */ |
4588ec20 JB |
6200 | { |
6201 | int width, height; | |
d43721a2 | 6202 | #ifndef USE_CRT_DLL |
4588ec20 | 6203 | extern int errno; |
d43721a2 | 6204 | #endif |
4588ec20 JB |
6205 | int old_errno = errno; |
6206 | ||
28d7d09f | 6207 | struct tty_display_info *tty; |
4d553a13 | 6208 | |
333f1b6f JD |
6209 | signal (SIGWINCH, window_change_signal); |
6210 | SIGNAL_THREAD_CHECK (signalnum); | |
6211 | ||
9628b887 KL |
6212 | /* The frame size change obviously applies to a single |
6213 | termcap-controlled terminal, but we can't decide which. | |
6214 | Therefore, we resize the frames corresponding to each tty. | |
9628b887 KL |
6215 | */ |
6216 | for (tty = tty_list; tty; tty = tty->next) { | |
4588ec20 | 6217 | |
0a125897 KL |
6218 | if (! tty->term_initted) |
6219 | continue; | |
4588ec20 | 6220 | |
db878925 DN |
6221 | /* Suspended tty frames have tty->input == NULL avoid trying to |
6222 | use it. */ | |
6223 | if (!tty->input) | |
6224 | continue; | |
6225 | ||
0b0d3e0b | 6226 | get_tty_size (fileno (tty->input), &width, &height); |
3fc809e2 | 6227 | |
bedeffcf | 6228 | if (width > 5 && height > 2) { |
9628b887 | 6229 | Lisp_Object tail, frame; |
3fc809e2 | 6230 | |
9628b887 | 6231 | FOR_EACH_FRAME (tail, frame) |
4d553a13 KL |
6232 | if (FRAME_TERMCAP_P (XFRAME (frame)) && FRAME_TTY (XFRAME (frame)) == tty) |
6233 | /* Record the new sizes, but don't reallocate the data | |
6234 | structures now. Let that be done later outside of the | |
6235 | signal handler. */ | |
6236 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); | |
9628b887 | 6237 | } |
4588ec20 | 6238 | } |
3fc809e2 | 6239 | |
4588ec20 JB |
6240 | errno = old_errno; |
6241 | } | |
6242 | #endif /* SIGWINCH */ | |
6243 | ||
6244 | ||
b96fd3e8 GM |
6245 | /* Do any change in frame size that was requested by a signal. SAFE |
6246 | non-zero means this function is called from a place where it is | |
6247 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 6248 | |
dfcf069d | 6249 | void |
b96fd3e8 GM |
6250 | do_pending_window_change (safe) |
6251 | int safe; | |
4588ec20 JB |
6252 | { |
6253 | /* If window_change_signal should have run before, run it now. */ | |
b96fd3e8 GM |
6254 | if (redisplaying_p && !safe) |
6255 | return; | |
177c0ea7 | 6256 | |
4588ec20 JB |
6257 | while (delayed_size_change) |
6258 | { | |
35f56f96 | 6259 | Lisp_Object tail, frame; |
4588ec20 JB |
6260 | |
6261 | delayed_size_change = 0; | |
6262 | ||
35f56f96 | 6263 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 6264 | { |
5f5c8ee5 | 6265 | struct frame *f = XFRAME (frame); |
35f56f96 | 6266 | |
7df02016 KS |
6267 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
6268 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
6269 | 0, 0, safe); | |
4588ec20 JB |
6270 | } |
6271 | } | |
6272 | } | |
6273 | ||
6274 | ||
502b9b64 | 6275 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 6276 | indicate no change is to take place. |
4588ec20 | 6277 | |
b6a65ac2 JB |
6278 | If DELAY is non-zero, then assume we're being called from a signal |
6279 | handler, and queue the change for later - perhaps the next | |
6280 | redisplay. Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
6281 | from a signal handler. |
6282 | ||
6283 | SAFE non-zero means this function is called from a place where it's | |
6284 | safe to change frame sizes while a redisplay is in progress. */ | |
b6a65ac2 | 6285 | |
dfcf069d | 6286 | void |
b96fd3e8 | 6287 | change_frame_size (f, newheight, newwidth, pretend, delay, safe) |
5f5c8ee5 | 6288 | register struct frame *f; |
b96fd3e8 | 6289 | int newheight, newwidth, pretend, delay, safe; |
45140e01 RS |
6290 | { |
6291 | Lisp_Object tail, frame; | |
3826ea1a | 6292 | |
9628b887 | 6293 | if (FRAME_MSDOS_P (f)) |
45140e01 | 6294 | { |
9628b887 KL |
6295 | /* On MS-DOS, all frames use the same screen, so a change in |
6296 | size affects all frames. Termcap now supports multiple | |
6297 | ttys. */ | |
45140e01 | 6298 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 6299 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 6300 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 6301 | pretend, delay, safe); |
45140e01 RS |
6302 | } |
6303 | else | |
b96fd3e8 | 6304 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
6305 | } |
6306 | ||
6307 | static void | |
b96fd3e8 | 6308 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe) |
5f5c8ee5 | 6309 | register struct frame *f; |
b96fd3e8 | 6310 | int newheight, newwidth, pretend, delay, safe; |
4588ec20 | 6311 | { |
7df02016 | 6312 | int new_frame_total_cols; |
aed13378 | 6313 | int count = SPECPDL_INDEX (); |
3826ea1a | 6314 | |
4588ec20 | 6315 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 6316 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 6317 | { |
7df02016 KS |
6318 | f->new_text_lines = newheight; |
6319 | f->new_text_cols = newwidth; | |
4588ec20 JB |
6320 | delayed_size_change = 1; |
6321 | return; | |
6322 | } | |
6323 | ||
502b9b64 | 6324 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
6325 | f->new_text_lines = 0; |
6326 | f->new_text_cols = 0; | |
b6a65ac2 | 6327 | |
08f7aa3e | 6328 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 6329 | if (newheight == 0) |
7df02016 | 6330 | newheight = FRAME_LINES (f); |
ae19c6f2 | 6331 | if (newwidth == 0) |
7df02016 | 6332 | newwidth = FRAME_COLS (f); |
3826ea1a | 6333 | |
5f5c8ee5 GM |
6334 | /* Compute width of windows in F. |
6335 | This is the width of the frame without vertical scroll bars. */ | |
7df02016 | 6336 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); |
3826ea1a | 6337 | |
b6a65ac2 | 6338 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 6339 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 JB |
6340 | |
6341 | /* If we're not changing the frame size, quit now. */ | |
7df02016 KS |
6342 | if (newheight == FRAME_LINES (f) |
6343 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) | |
4588ec20 JB |
6344 | return; |
6345 | ||
cbb95688 RS |
6346 | BLOCK_INPUT; |
6347 | ||
886a8a6c KH |
6348 | #ifdef MSDOS |
6349 | /* We only can set screen dimensions to certain values supported | |
6350 | by our video hardware. Try to find the smallest size greater | |
6351 | or equal to the requested dimensions. */ | |
6352 | dos_set_window_size (&newheight, &newwidth); | |
6353 | #endif | |
6354 | ||
7df02016 | 6355 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 6356 | { |
5f5c8ee5 | 6357 | if (FRAME_HAS_MINIBUF_P (f) && !FRAME_MINIBUF_ONLY_P (f)) |
4588ec20 | 6358 | { |
5f5c8ee5 | 6359 | /* Frame has both root and mini-buffer. */ |
7df02016 | 6360 | XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f))->top_line, |
5f5c8ee5 GM |
6361 | FRAME_TOP_MARGIN (f)); |
6362 | set_window_height (FRAME_ROOT_WINDOW (f), | |
6363 | (newheight | |
6364 | - 1 | |
6365 | - FRAME_TOP_MARGIN (f)), | |
f8748f0f | 6366 | 2); |
7df02016 | 6367 | XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top_line, |
a5d8b611 | 6368 | newheight - 1); |
5f5c8ee5 | 6369 | set_window_height (FRAME_MINIBUF_WINDOW (f), 1, 0); |
4588ec20 JB |
6370 | } |
6371 | else | |
502b9b64 | 6372 | /* Frame has just one top-level window. */ |
5f5c8ee5 | 6373 | set_window_height (FRAME_ROOT_WINDOW (f), |
f8748f0f | 6374 | newheight - FRAME_TOP_MARGIN (f), 2); |
b6a65ac2 | 6375 | |
48e482e6 EZ |
6376 | /* MSDOS frames cannot PRETEND, as they change frame size by |
6377 | manipulating video hardware. */ | |
6378 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 6379 | FrameRows (FRAME_TTY (f)) = newheight; |
4588ec20 JB |
6380 | } |
6381 | ||
7df02016 | 6382 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 6383 | { |
f8748f0f | 6384 | set_window_width (FRAME_ROOT_WINDOW (f), new_frame_total_cols, 2); |
5f5c8ee5 | 6385 | if (FRAME_HAS_MINIBUF_P (f)) |
7df02016 | 6386 | set_window_width (FRAME_MINIBUF_WINDOW (f), new_frame_total_cols, 0); |
4588ec20 | 6387 | |
48e482e6 EZ |
6388 | /* MSDOS frames cannot PRETEND, as they change frame size by |
6389 | manipulating video hardware. */ | |
6390 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 6391 | FrameCols (FRAME_TTY (f)) = newwidth; |
5f5c8ee5 | 6392 | |
9ea173e8 | 6393 | if (WINDOWP (f->tool_bar_window)) |
7df02016 | 6394 | XSETFASTINT (XWINDOW (f->tool_bar_window)->total_cols, newwidth); |
4588ec20 JB |
6395 | } |
6396 | ||
7df02016 KS |
6397 | FRAME_LINES (f) = newheight; |
6398 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 6399 | |
5f5c8ee5 GM |
6400 | { |
6401 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
6402 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 6403 | |
5f5c8ee5 GM |
6404 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
6405 | &text_area_height); | |
6406 | if (w->cursor.x >= text_area_x + text_area_width) | |
6407 | w->cursor.hpos = w->cursor.x = 0; | |
6408 | if (w->cursor.y >= text_area_y + text_area_height) | |
6409 | w->cursor.vpos = w->cursor.y = 0; | |
6410 | } | |
986e61b8 | 6411 | |
5f5c8ee5 | 6412 | adjust_glyphs (f); |
5f5c8ee5 | 6413 | calculate_costs (f); |
cb02fa39 GM |
6414 | SET_FRAME_GARBAGED (f); |
6415 | f->resized_p = 1; | |
97cf50e7 RS |
6416 | |
6417 | UNBLOCK_INPUT; | |
61730a69 | 6418 | |
e523f7e5 RS |
6419 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); |
6420 | ||
ef264c42 | 6421 | run_window_configuration_change_hook (f); |
e523f7e5 RS |
6422 | |
6423 | unbind_to (count, Qnil); | |
4588ec20 | 6424 | } |
5f5c8ee5 GM |
6425 | |
6426 | ||
4588ec20 | 6427 | \f |
5f5c8ee5 GM |
6428 | /*********************************************************************** |
6429 | Terminal Related Lisp Functions | |
6430 | ***********************************************************************/ | |
6431 | ||
6432 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 6433 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
6434 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
6435 | FILE = nil means just close any termscript file currently open. */) | |
6436 | (file) | |
5f5c8ee5 GM |
6437 | Lisp_Object file; |
6438 | { | |
0b0d3e0b KL |
6439 | struct tty_display_info *tty; |
6440 | ||
7d2f1216 EZ |
6441 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ()) |
6442 | && ! FRAME_MSDOS_P (SELECTED_FRAME ())) | |
0b0d3e0b KL |
6443 | error ("Current frame is not on a tty device"); |
6444 | ||
6445 | tty = CURTTY (); | |
6446 | ||
6447 | if (tty->termscript != 0) | |
e18c7093 KL |
6448 | { |
6449 | BLOCK_INPUT; | |
0b0d3e0b | 6450 | fclose (tty->termscript); |
e18c7093 KL |
6451 | UNBLOCK_INPUT; |
6452 | } | |
0b0d3e0b | 6453 | tty->termscript = 0; |
5f5c8ee5 GM |
6454 | |
6455 | if (! NILP (file)) | |
6456 | { | |
6457 | file = Fexpand_file_name (file, Qnil); | |
0b0d3e0b KL |
6458 | tty->termscript = fopen (SDATA (file), "w"); |
6459 | if (tty->termscript == 0) | |
5f5c8ee5 GM |
6460 | report_file_error ("Opening termscript", Fcons (file, Qnil)); |
6461 | } | |
6462 | return Qnil; | |
6463 | } | |
6464 | ||
6465 | ||
4588ec20 | 6466 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
62af879c | 6467 | Ssend_string_to_terminal, 1, 2, 0, |
7ee72033 | 6468 | doc: /* Send STRING to the terminal without alteration. |
62af879c KL |
6469 | Control characters in STRING will have terminal-dependent effects. |
6470 | ||
6ed8eeff | 6471 | Optional parameter TERMINAL specifies the tty terminal device to use. |
62af879c KL |
6472 | It may be a terminal id, a frame, or nil for the terminal used by the |
6473 | currently selected frame. */) | |
6ed8eeff | 6474 | (string, terminal) |
e912ba09 | 6475 | Lisp_Object string; |
6ed8eeff | 6476 | Lisp_Object terminal; |
4588ec20 | 6477 | { |
717a00ef | 6478 | struct terminal *t = get_tty_terminal (terminal, 1); |
0b0d3e0b KL |
6479 | struct tty_display_info *tty; |
6480 | ||
94f3db62 | 6481 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 6482 | CHECK_STRING (string); |
2c1e4409 | 6483 | BLOCK_INPUT; |
0b0d3e0b | 6484 | |
6ed8eeff KL |
6485 | if (!t) |
6486 | error ("Unknown terminal device"); | |
0b0d3e0b | 6487 | |
6ed8eeff | 6488 | tty = t->display_info.tty; |
3fc809e2 | 6489 | |
cecfdea6 SM |
6490 | if (! tty->output) |
6491 | error ("Terminal is currently suspended"); | |
6492 | ||
0b0d3e0b | 6493 | if (tty->termscript) |
4588ec20 | 6494 | { |
0b0d3e0b KL |
6495 | fwrite (SDATA (string), 1, SBYTES (string), tty->termscript); |
6496 | fflush (tty->termscript); | |
4588ec20 | 6497 | } |
0b0d3e0b KL |
6498 | fwrite (SDATA (string), 1, SBYTES (string), tty->output); |
6499 | fflush (tty->output); | |
2c1e4409 | 6500 | UNBLOCK_INPUT; |
4588ec20 JB |
6501 | return Qnil; |
6502 | } | |
6503 | ||
5f5c8ee5 | 6504 | |
4588ec20 | 6505 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 6506 | doc: /* Beep, or flash the screen. |
228299fa | 6507 | Also, unless an argument is given, |
7ee72033 MB |
6508 | terminate any keyboard macro currently executing. */) |
6509 | (arg) | |
4588ec20 JB |
6510 | Lisp_Object arg; |
6511 | { | |
efb859b4 | 6512 | if (!NILP (arg)) |
4588ec20 | 6513 | { |
7fa788da RS |
6514 | if (noninteractive) |
6515 | putchar (07); | |
6516 | else | |
385ed61f | 6517 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
6518 | } |
6519 | else | |
6520 | bitch_at_user (); | |
6521 | ||
6522 | return Qnil; | |
6523 | } | |
6524 | ||
dfcf069d | 6525 | void |
4588ec20 JB |
6526 | bitch_at_user () |
6527 | { | |
6528 | if (noninteractive) | |
6529 | putchar (07); | |
5f5c8ee5 | 6530 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
4588ec20 JB |
6531 | error ("Keyboard macro terminated by a command ringing the bell"); |
6532 | else | |
385ed61f | 6533 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
6534 | } |
6535 | ||
5f5c8ee5 GM |
6536 | |
6537 | \f | |
6538 | /*********************************************************************** | |
6539 | Sleeping, Waiting | |
6540 | ***********************************************************************/ | |
6541 | ||
4588ec20 | 6542 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 6543 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
6544 | SECONDS may be a floating-point value, meaning that you can wait for a |
6545 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
6546 | additional wait period, in milliseconds; this may be useful if your | |
6547 | Emacs was built without floating point support. | |
7ee72033 MB |
6548 | \(Not all operating systems support waiting for a fraction of a second.) */) |
6549 | (seconds, milliseconds) | |
767229f8 | 6550 | Lisp_Object seconds, milliseconds; |
4588ec20 | 6551 | { |
767229f8 | 6552 | int sec, usec; |
4588ec20 | 6553 | |
767229f8 | 6554 | if (NILP (milliseconds)) |
e9c9a718 | 6555 | XSETINT (milliseconds, 0); |
767229f8 | 6556 | else |
b7826503 | 6557 | CHECK_NUMBER (milliseconds); |
b07646f5 JB |
6558 | usec = XINT (milliseconds) * 1000; |
6559 | ||
b07646f5 JB |
6560 | { |
6561 | double duration = extract_float (seconds); | |
6562 | sec = (int) duration; | |
6563 | usec += (duration - sec) * 1000000; | |
6564 | } | |
4588ec20 | 6565 | |
a41f8bed | 6566 | #ifndef EMACS_HAS_USECS |
767229f8 | 6567 | if (sec == 0 && usec != 0) |
861e19b9 | 6568 | error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); |
4588ec20 | 6569 | #endif |
767229f8 JB |
6570 | |
6571 | /* Assure that 0 <= usec < 1000000. */ | |
6572 | if (usec < 0) | |
6573 | { | |
153a073c | 6574 | /* We can't rely on the rounding being correct if usec is negative. */ |
767229f8 JB |
6575 | if (-1000000 < usec) |
6576 | sec--, usec += 1000000; | |
6577 | else | |
6578 | sec -= -usec / 1000000, usec = 1000000 - (-usec % 1000000); | |
4588ec20 | 6579 | } |
767229f8 JB |
6580 | else |
6581 | sec += usec / 1000000, usec %= 1000000; | |
6582 | ||
6b5153b1 | 6583 | if (sec < 0 || (sec == 0 && usec == 0)) |
767229f8 | 6584 | return Qnil; |
4588ec20 | 6585 | |
dcd1ca45 | 6586 | wait_reading_process_output (sec, usec, 0, 0, Qnil, NULL, 0); |
4588ec20 JB |
6587 | |
6588 | return Qnil; | |
6589 | } | |
6590 | ||
5f5c8ee5 | 6591 | |
dcd1ca45 | 6592 | /* This is just like wait_reading_process_output, except that |
902b9b6d | 6593 | it does redisplay. |
f76475ad | 6594 | |
2bcac766 CY |
6595 | TIMEOUT is number of seconds to wait (float or integer), |
6596 | or t to wait forever. | |
902b9b6d KS |
6597 | READING is 1 if reading input. |
6598 | If DO_DISPLAY is >0 display process output while waiting. | |
6599 | If DO_DISPLAY is >1 perform an initial redisplay before waiting. | |
6600 | */ | |
4588ec20 | 6601 | |
f76475ad | 6602 | Lisp_Object |
902b9b6d KS |
6603 | sit_for (timeout, reading, do_display) |
6604 | Lisp_Object timeout; | |
6605 | int reading, do_display; | |
f76475ad | 6606 | { |
902b9b6d | 6607 | int sec, usec; |
f222369e | 6608 | |
902b9b6d | 6609 | swallow_events (do_display); |
ccddf474 | 6610 | |
902b9b6d | 6611 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 6612 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 6613 | return Qnil; |
4588ec20 | 6614 | |
902b9b6d KS |
6615 | if (do_display >= 2) |
6616 | redisplay_preserve_echo_area (2); | |
6617 | ||
8e09f23f | 6618 | if (INTEGERP (timeout)) |
f222369e | 6619 | { |
7ff14773 | 6620 | sec = XINT (timeout); |
8e09f23f | 6621 | usec = 0; |
f222369e | 6622 | } |
8e09f23f KS |
6623 | else if (FLOATP (timeout)) |
6624 | { | |
99a20368 | 6625 | double seconds = XFLOAT_DATA (timeout); |
902b9b6d KS |
6626 | sec = (int) seconds; |
6627 | usec = (int) ((seconds - sec) * 1000000); | |
6628 | } | |
2bcac766 CY |
6629 | else if (EQ (timeout, Qt)) |
6630 | { | |
6631 | sec = 0; | |
6632 | usec = 0; | |
6633 | } | |
902b9b6d | 6634 | else |
8e09f23f | 6635 | wrong_type_argument (Qnumberp, timeout); |
4588ec20 | 6636 | |
2bcac766 | 6637 | if (sec == 0 && usec == 0 && !EQ (timeout, Qt)) |
dfdb645c JB |
6638 | return Qt; |
6639 | ||
4588ec20 | 6640 | #ifdef SIGIO |
8fc798e9 | 6641 | gobble_input (0); |
f76475ad JB |
6642 | #endif |
6643 | ||
902b9b6d | 6644 | wait_reading_process_output (sec, usec, reading ? -1 : 1, do_display, |
dcd1ca45 | 6645 | Qnil, NULL, 0); |
f76475ad | 6646 | |
4588ec20 JB |
6647 | return detect_input_pending () ? Qnil : Qt; |
6648 | } | |
6649 | ||
5f5c8ee5 | 6650 | |
01327edf KS |
6651 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
6652 | doc: /* Perform redisplay if no input is available. | |
a5c2c707 | 6653 | If optional arg FORCE is non-nil or `redisplay-dont-pause' is non-nil, |
03240971 KS |
6654 | perform a full redisplay even if input is available. |
6655 | Return t if redisplay was performed, nil otherwise. */) | |
01327edf KS |
6656 | (force) |
6657 | Lisp_Object force; | |
f76475ad | 6658 | { |
01327edf | 6659 | int count; |
659d9874 | 6660 | |
902b9b6d KS |
6661 | swallow_events (1); |
6662 | if ((detect_input_pending_run_timers (1) | |
01327edf | 6663 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
6664 | || !NILP (Vexecuting_kbd_macro)) |
6665 | return Qnil; | |
f76475ad | 6666 | |
01327edf KS |
6667 | count = SPECPDL_INDEX (); |
6668 | if (!NILP (force) && !redisplay_dont_pause) | |
6669 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 6670 | redisplay_preserve_echo_area (2); |
01327edf | 6671 | unbind_to (count, Qnil); |
7ba07a1a | 6672 | return Qt; |
f76475ad | 6673 | } |
5f5c8ee5 GM |
6674 | |
6675 | ||
6676 | \f | |
6677 | /*********************************************************************** | |
6678 | Other Lisp Functions | |
6679 | ***********************************************************************/ | |
6680 | ||
6681 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
6682 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 6683 | buffer-modified-flags. */ |
5f5c8ee5 GM |
6684 | |
6685 | static Lisp_Object frame_and_buffer_state; | |
6686 | ||
6687 | ||
6688 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 6689 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 6690 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
6691 | VARIABLE is a variable name whose value is either nil or a state vector |
6692 | that will be updated to contain all frames and buffers, | |
228299fa | 6693 | aside from buffers whose names start with space, |
44edd521 RS |
6694 | along with the buffers' read-only and modified flags. This allows a fast |
6695 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 6696 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
6697 | the current state. |
6698 | ||
6699 | If VARIABLE is nil, an internal variable is used. Users should not | |
6700 | pass nil for VARIABLE. */) | |
6701 | (variable) | |
6702 | Lisp_Object variable; | |
5f5c8ee5 | 6703 | { |
44edd521 RS |
6704 | Lisp_Object state, tail, frame, buf; |
6705 | Lisp_Object *vecp, *end; | |
5f5c8ee5 GM |
6706 | int n; |
6707 | ||
44edd521 RS |
6708 | if (! NILP (variable)) |
6709 | { | |
6710 | CHECK_SYMBOL (variable); | |
6711 | state = Fsymbol_value (variable); | |
6712 | if (! VECTORP (state)) | |
6713 | goto changed; | |
6714 | } | |
6715 | else | |
6716 | state = frame_and_buffer_state; | |
6717 | ||
6718 | vecp = XVECTOR (state)->contents; | |
6719 | end = vecp + XVECTOR (state)->size; | |
6720 | ||
5f5c8ee5 GM |
6721 | FOR_EACH_FRAME (tail, frame) |
6722 | { | |
44edd521 RS |
6723 | if (vecp == end) |
6724 | goto changed; | |
5f5c8ee5 GM |
6725 | if (!EQ (*vecp++, frame)) |
6726 | goto changed; | |
44edd521 RS |
6727 | if (vecp == end) |
6728 | goto changed; | |
5f5c8ee5 GM |
6729 | if (!EQ (*vecp++, XFRAME (frame)->name)) |
6730 | goto changed; | |
6731 | } | |
44edd521 | 6732 | /* Check that the buffer info matches. */ |
7539e11f | 6733 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6734 | { |
7539e11f | 6735 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6736 | /* Ignore buffers that aren't included in buffer lists. */ |
d5db4077 | 6737 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
5f5c8ee5 | 6738 | continue; |
44edd521 RS |
6739 | if (vecp == end) |
6740 | goto changed; | |
5f5c8ee5 GM |
6741 | if (!EQ (*vecp++, buf)) |
6742 | goto changed; | |
44edd521 RS |
6743 | if (vecp == end) |
6744 | goto changed; | |
5f5c8ee5 GM |
6745 | if (!EQ (*vecp++, XBUFFER (buf)->read_only)) |
6746 | goto changed; | |
44edd521 RS |
6747 | if (vecp == end) |
6748 | goto changed; | |
5f5c8ee5 GM |
6749 | if (!EQ (*vecp++, Fbuffer_modified_p (buf))) |
6750 | goto changed; | |
6751 | } | |
44edd521 RS |
6752 | if (vecp == end) |
6753 | goto changed; | |
5f5c8ee5 GM |
6754 | /* Detect deletion of a buffer at the end of the list. */ |
6755 | if (EQ (*vecp, Qlambda)) | |
6756 | return Qnil; | |
44edd521 RS |
6757 | |
6758 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 6759 | changed: |
44edd521 RS |
6760 | /* Count the size we will need. |
6761 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
6762 | n = 1; |
6763 | FOR_EACH_FRAME (tail, frame) | |
6764 | n += 2; | |
7539e11f | 6765 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6766 | n += 3; |
44edd521 RS |
6767 | /* Reallocate the vector if data has grown to need it, |
6768 | or if it has shrunk a lot. */ | |
6769 | if (! VECTORP (state) | |
6770 | || n > XVECTOR (state)->size | |
6771 | || n + 20 < XVECTOR (state)->size / 2) | |
5f5c8ee5 | 6772 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
6773 | { |
6774 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
6775 | if (! NILP (variable)) | |
6776 | Fset (variable, state); | |
6777 | else | |
6778 | frame_and_buffer_state = state; | |
6779 | } | |
6780 | ||
6781 | /* Record the new data in the (possibly reallocated) vector. */ | |
6782 | vecp = XVECTOR (state)->contents; | |
5f5c8ee5 GM |
6783 | FOR_EACH_FRAME (tail, frame) |
6784 | { | |
6785 | *vecp++ = frame; | |
6786 | *vecp++ = XFRAME (frame)->name; | |
6787 | } | |
7539e11f | 6788 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6789 | { |
7539e11f | 6790 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6791 | /* Ignore buffers that aren't included in buffer lists. */ |
d5db4077 | 6792 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
5f5c8ee5 GM |
6793 | continue; |
6794 | *vecp++ = buf; | |
6795 | *vecp++ = XBUFFER (buf)->read_only; | |
6796 | *vecp++ = Fbuffer_modified_p (buf); | |
6797 | } | |
6798 | /* Fill up the vector with lambdas (always at least one). */ | |
6799 | *vecp++ = Qlambda; | |
44edd521 RS |
6800 | while (vecp - XVECTOR (state)->contents |
6801 | < XVECTOR (state)->size) | |
5f5c8ee5 GM |
6802 | *vecp++ = Qlambda; |
6803 | /* Make sure we didn't overflow the vector. */ | |
44edd521 RS |
6804 | if (vecp - XVECTOR (state)->contents |
6805 | > XVECTOR (state)->size) | |
5f5c8ee5 GM |
6806 | abort (); |
6807 | return Qt; | |
6808 | } | |
6809 | ||
6810 | ||
4588ec20 | 6811 | \f |
5f5c8ee5 GM |
6812 | /*********************************************************************** |
6813 | Initialization | |
6814 | ***********************************************************************/ | |
6815 | ||
5f5c8ee5 GM |
6816 | /* Initialization done when Emacs fork is started, before doing stty. |
6817 | Determine terminal type and set terminal_driver. Then invoke its | |
6818 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 6819 | |
dfcf069d | 6820 | void |
4588ec20 JB |
6821 | init_display () |
6822 | { | |
28d440ab KL |
6823 | char *terminal_type; |
6824 | ||
4588ec20 JB |
6825 | #ifdef HAVE_X_WINDOWS |
6826 | extern int display_arg; | |
6827 | #endif | |
6828 | ||
5f5c8ee5 GM |
6829 | /* Construct the space glyph. */ |
6830 | space_glyph.type = CHAR_GLYPH; | |
3fc809e2 | 6831 | SET_CHAR_GLYPH (space_glyph, ' ', DEFAULT_FACE_ID, 0); |
5f5c8ee5 GM |
6832 | space_glyph.charpos = -1; |
6833 | ||
4588ec20 JB |
6834 | inverse_video = 0; |
6835 | cursor_in_echo_area = 0; | |
6836 | terminal_type = (char *) 0; | |
6837 | ||
1315c181 JB |
6838 | /* Now is the time to initialize this; it's used by init_sys_modes |
6839 | during startup. */ | |
2246281f | 6840 | Vinitial_window_system = Qnil; |
4588ec20 | 6841 | |
4181ad9c KL |
6842 | /* SIGWINCH needs to be handled no matter what display we start |
6843 | with. Otherwise newly opened tty frames will not resize | |
6844 | automatically. */ | |
6845 | #ifdef SIGWINCH | |
6846 | #ifndef CANNOT_DUMP | |
6847 | if (initialized) | |
6848 | #endif /* CANNOT_DUMP */ | |
6849 | signal (SIGWINCH, window_change_signal); | |
6850 | #endif /* SIGWINCH */ | |
4588ec20 | 6851 | |
d6ef42b9 | 6852 | /* If running as a daemon, no need to initialize any frames/terminal. */ |
ff808935 DN |
6853 | if (IS_DAEMON) |
6854 | return; | |
d6ef42b9 | 6855 | |
1315c181 JB |
6856 | /* If the user wants to use a window system, we shouldn't bother |
6857 | initializing the terminal. This is especially important when the | |
6858 | terminal is so dumb that emacs gives up before and doesn't bother | |
6859 | using the window system. | |
4588ec20 | 6860 | |
36bbad1d KH |
6861 | If the DISPLAY environment variable is set and nonempty, |
6862 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6863 | |
6864 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 6865 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 6866 | { |
36bbad1d | 6867 | char *display; |
36bbad1d | 6868 | display = getenv ("DISPLAY"); |
36bbad1d | 6869 | display_arg = (display != 0 && *display != 0); |
c1fc674b AS |
6870 | |
6871 | if (display_arg && !x_display_ok (display)) | |
6872 | { | |
6873 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
6874 | display); | |
6875 | inhibit_window_system = 1; | |
6876 | } | |
f040093a | 6877 | } |
d460af17 | 6878 | |
177c0ea7 | 6879 | if (!inhibit_window_system && display_arg |
9e4555e8 RS |
6880 | #ifndef CANNOT_DUMP |
6881 | && initialized | |
6882 | #endif | |
6883 | ) | |
4588ec20 | 6884 | { |
2246281f | 6885 | Vinitial_window_system = intern ("x"); |
4588ec20 JB |
6886 | #ifdef HAVE_X11 |
6887 | Vwindow_system_version = make_number (11); | |
039e5d71 | 6888 | #endif |
8a2a6032 | 6889 | #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES) |
039e5d71 | 6890 | /* In some versions of ncurses, |
6a428f77 | 6891 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6892 | So call tgetent. */ |
6893 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 | 6894 | #endif |
5f5c8ee5 | 6895 | adjust_frame_glyphs_initially (); |
4588ec20 JB |
6896 | return; |
6897 | } | |
6898 | #endif /* HAVE_X_WINDOWS */ | |
6899 | ||
fd2e066a | 6900 | #ifdef HAVE_NTGUI |
177c0ea7 | 6901 | if (!inhibit_window_system) |
fd2e066a | 6902 | { |
2246281f | 6903 | Vinitial_window_system = intern ("w32"); |
fd2e066a | 6904 | Vwindow_system_version = make_number (1); |
5f5c8ee5 | 6905 | adjust_frame_glyphs_initially (); |
fd2e066a GV |
6906 | return; |
6907 | } | |
6908 | #endif /* HAVE_NTGUI */ | |
6909 | ||
edfda783 AR |
6910 | #ifdef HAVE_NS |
6911 | if (!inhibit_window_system | |
6912 | #ifndef CANNOT_DUMP | |
6913 | && initialized | |
6914 | #endif | |
6915 | ) | |
6916 | { | |
6917 | Vinitial_window_system = intern("ns"); | |
6918 | Vwindow_system_version = make_number(10); | |
6919 | adjust_frame_glyphs_initially (); | |
6920 | return; | |
6921 | } | |
6922 | #endif | |
6923 | ||
4588ec20 JB |
6924 | /* If no window system has been specified, try to use the terminal. */ |
6925 | if (! isatty (0)) | |
6926 | { | |
1559a86d | 6927 | fatal ("standard input is not a tty"); |
4588ec20 JB |
6928 | exit (1); |
6929 | } | |
6930 | ||
6152361f JR |
6931 | #ifdef WINDOWSNT |
6932 | terminal_type = "w32console"; | |
6933 | #else | |
153a073c | 6934 | /* Look at the TERM variable. */ |
4588ec20 | 6935 | terminal_type = (char *) getenv ("TERM"); |
6152361f | 6936 | #endif |
4588ec20 JB |
6937 | if (!terminal_type) |
6938 | { | |
5d12ff0b | 6939 | #ifdef HAVE_WINDOW_SYSTEM |
b9e590fc RS |
6940 | if (! inhibit_window_system) |
6941 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6942 | else |
6943 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6944 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
4588ec20 JB |
6945 | exit (1); |
6946 | } | |
6947 | ||
0a125897 | 6948 | { |
6ed8eeff | 6949 | struct terminal *t; |
3224dac1 KL |
6950 | struct frame *f = XFRAME (selected_frame); |
6951 | ||
6952 | /* Open a display on the controlling tty. */ | |
6ed8eeff | 6953 | t = init_tty (0, terminal_type, 1); /* Errors are fatal. */ |
3224dac1 KL |
6954 | |
6955 | /* Convert the initial frame to use the new display. */ | |
b04f5ad2 | 6956 | if (f->output_method != output_initial) |
3224dac1 | 6957 | abort (); |
6ed8eeff KL |
6958 | f->output_method = t->type; |
6959 | f->terminal = t; | |
3224dac1 | 6960 | |
6ed8eeff KL |
6961 | t->reference_count++; |
6962 | t->display_info.tty->top_frame = selected_frame; | |
5b65d888 | 6963 | change_frame_size (XFRAME (selected_frame), |
6ed8eeff KL |
6964 | FrameRows (t->display_info.tty), |
6965 | FrameCols (t->display_info.tty), 0, 0, 1); | |
3224dac1 | 6966 | |
6ed8eeff KL |
6967 | /* Delete the initial terminal. */ |
6968 | if (--initial_terminal->reference_count == 0 | |
6969 | && initial_terminal->delete_terminal_hook) | |
6970 | (*initial_terminal->delete_terminal_hook) (initial_terminal); | |
2666355c KL |
6971 | |
6972 | /* Update frame parameters to reflect the new type. */ | |
6973 | Fmodify_frame_parameters | |
6974 | (selected_frame, Fcons (Fcons (Qtty_type, | |
6ed8eeff | 6975 | Ftty_type (selected_frame)), Qnil)); |
657ceaa0 EZ |
6976 | if (t->display_info.tty->name) |
6977 | Fmodify_frame_parameters (selected_frame, | |
6978 | Fcons (Fcons (Qtty, build_string (t->display_info.tty->name)), | |
6979 | Qnil)); | |
6980 | else | |
6981 | Fmodify_frame_parameters (selected_frame, Fcons (Fcons (Qtty, Qnil), | |
6982 | Qnil)); | |
0a125897 | 6983 | } |
3fc809e2 | 6984 | |
d86c299a | 6985 | { |
91fb7e1b | 6986 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6987 | int width = FRAME_TOTAL_COLS (sf); |
6988 | int height = FRAME_LINES (sf); | |
d86c299a | 6989 | |
5f5c8ee5 | 6990 | unsigned int total_glyphs = height * (width + 2) * sizeof (struct glyph); |
d86c299a | 6991 | |
5f5c8ee5 GM |
6992 | /* If these sizes are so big they cause overflow, just ignore the |
6993 | change. It's not clear what better we could do. */ | |
6994 | if (total_glyphs / sizeof (struct glyph) / height != width + 2) | |
1559a86d | 6995 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6996 | } |
6997 | ||
5f5c8ee5 | 6998 | adjust_frame_glyphs_initially (); |
91fb7e1b | 6999 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 7000 | |
5f5c8ee5 GM |
7001 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ |
7002 | if (initialized | |
7003 | && !noninteractive | |
2246281f | 7004 | && NILP (Vinitial_window_system)) |
2d764c78 EZ |
7005 | { |
7006 | /* For the initial frame, we don't have any way of knowing what | |
7007 | are the foreground and background colors of the terminal. */ | |
7008 | struct frame *sf = SELECTED_FRAME(); | |
7009 | ||
f9d2fdc4 EZ |
7010 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
7011 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
7012 | call0 (intern ("tty-set-up-initial-frame-faces")); |
7013 | } | |
5f5c8ee5 GM |
7014 | } |
7015 | ||
7016 | ||
7017 | \f | |
7018 | /*********************************************************************** | |
7019 | Blinking cursor | |
7020 | ***********************************************************************/ | |
7021 | ||
c3f13540 | 7022 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 7023 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 7024 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
7025 | WINDOW nil means use the selected window. SHOW non-nil means |
7026 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 MB |
7027 | don't show a cursor. */) |
7028 | (window, show) | |
5d7791b3 | 7029 | Lisp_Object window, show; |
5f5c8ee5 | 7030 | { |
5f5c8ee5 GM |
7031 | /* Don't change cursor state while redisplaying. This could confuse |
7032 | output routines. */ | |
7033 | if (!redisplaying_p) | |
7034 | { | |
7035 | if (NILP (window)) | |
7036 | window = selected_window; | |
7037 | else | |
b7826503 | 7038 | CHECK_WINDOW (window); |
177c0ea7 | 7039 | |
5d7791b3 | 7040 | XWINDOW (window)->cursor_off_p = NILP (show); |
5f5c8ee5 GM |
7041 | } |
7042 | ||
7043 | return Qnil; | |
4588ec20 | 7044 | } |
5f5c8ee5 GM |
7045 | |
7046 | ||
5d7791b3 GM |
7047 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
7048 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 7049 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 MB |
7050 | WINDOW nil or omitted means report on the selected window. */) |
7051 | (window) | |
5d7791b3 GM |
7052 | Lisp_Object window; |
7053 | { | |
7054 | struct window *w; | |
177c0ea7 | 7055 | |
5d7791b3 GM |
7056 | if (NILP (window)) |
7057 | window = selected_window; | |
7058 | else | |
b7826503 | 7059 | CHECK_WINDOW (window); |
177c0ea7 | 7060 | |
5d7791b3 | 7061 | w = XWINDOW (window); |
177c0ea7 | 7062 | return w->cursor_off_p ? Qnil : Qt; |
5d7791b3 GM |
7063 | } |
7064 | ||
87478b52 SM |
7065 | DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame, |
7066 | Slast_nonminibuf_frame, 0, 0, 0, | |
7067 | doc: /* Value is last nonminibuffer frame. */) | |
7068 | () | |
7069 | { | |
4958ed94 | 7070 | Lisp_Object frame = Qnil; |
87478b52 | 7071 | |
4958ed94 SM |
7072 | if (last_nonminibuf_frame) |
7073 | XSETFRAME (frame, last_nonminibuf_frame); | |
87478b52 SM |
7074 | |
7075 | return frame; | |
7076 | } | |
4588ec20 | 7077 | \f |
5f5c8ee5 GM |
7078 | /*********************************************************************** |
7079 | Initialization | |
7080 | ***********************************************************************/ | |
7081 | ||
dfcf069d | 7082 | void |
4588ec20 JB |
7083 | syms_of_display () |
7084 | { | |
502b9b64 | 7085 | defsubr (&Sredraw_frame); |
4588ec20 | 7086 | defsubr (&Sredraw_display); |
078b3696 | 7087 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
7088 | defsubr (&Sopen_termscript); |
7089 | defsubr (&Sding); | |
7ba07a1a | 7090 | defsubr (&Sredisplay); |
4588ec20 JB |
7091 | defsubr (&Ssleep_for); |
7092 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 7093 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 7094 | defsubr (&Sinternal_show_cursor_p); |
87478b52 | 7095 | defsubr (&Slast_nonminibuf_frame); |
4588ec20 | 7096 | |
2d5912c1 | 7097 | #if GLYPH_DEBUG |
9b0e97aa GM |
7098 | defsubr (&Sdump_redisplay_history); |
7099 | #endif | |
7100 | ||
d1dad759 | 7101 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
7102 | staticpro (&frame_and_buffer_state); |
7103 | ||
9cda4f7c RS |
7104 | Qdisplay_table = intern ("display-table"); |
7105 | staticpro (&Qdisplay_table); | |
e7067d00 GM |
7106 | Qredisplay_dont_pause = intern ("redisplay-dont-pause"); |
7107 | staticpro (&Qredisplay_dont_pause); | |
9cda4f7c | 7108 | |
7ee72033 | 7109 | DEFVAR_INT ("baud-rate", &baud_rate, |
bacf09b4 | 7110 | doc: /* *The output baud rate of the terminal. |
228299fa GM |
7111 | On most systems, changing this value will affect the amount of padding |
7112 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 7113 | |
7ee72033 | 7114 | DEFVAR_BOOL ("inverse-video", &inverse_video, |
bacf09b4 | 7115 | doc: /* *Non-nil means invert the entire frame display. |
228299fa | 7116 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 7117 | |
7ee72033 | 7118 | DEFVAR_BOOL ("visible-bell", &visible_bell, |
bacf09b4 | 7119 | doc: /* *Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
7120 | |
7121 | See also `ring-bell-function'. */); | |
177c0ea7 | 7122 | |
7ee72033 | 7123 | DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter, |
bacf09b4 | 7124 | doc: /* *Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
7125 | A non-nil value is useful if the terminal can automatically preserve |
7126 | Emacs's frame display when you reenter Emacs. | |
7127 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 7128 | |
2246281f KL |
7129 | DEFVAR_LISP ("initial-window-system", &Vinitial_window_system, |
7130 | doc: /* Name of the window system that Emacs uses for the first frame. | |
85565e9e RS |
7131 | The value is a symbol--for instance, `x' for X windows. |
7132 | The value is nil if Emacs is using a text-only terminal. */); | |
177c0ea7 | 7133 | |
70b8d0a4 SM |
7134 | DEFVAR_KBOARD ("window-system", Vwindow_system, |
7135 | doc: /* Name of window system through which the selected frame is displayed. | |
7136 | The value is a symbol--for instance, `x' for X windows. | |
7137 | The value is nil if the selected frame is on a text-only-terminal. */); | |
7138 | ||
7ee72033 | 7139 | DEFVAR_LISP ("window-system-version", &Vwindow_system_version, |
bacf09b4 | 7140 | doc: /* The version number of the window system in use. |
c22140f6 | 7141 | For X windows, this is 11. */); |
177c0ea7 | 7142 | |
7ee72033 | 7143 | DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area, |
bacf09b4 | 7144 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 7145 | |
7ee72033 | 7146 | DEFVAR_LISP ("glyph-table", &Vglyph_table, |
bacf09b4 | 7147 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
7148 | If not nil, this is a vector indexed by glyph code to define the glyph. |
7149 | Each element can be: | |
7150 | integer: a glyph code which this glyph is an alias for. | |
7151 | string: output this glyph using that string (not impl. in X windows). | |
7152 | nil: this glyph mod 524288 is the code of a character to output, | |
7153 | and this glyph / 524288 is the face number (see `face-id') to use | |
7154 | while outputting it. */); | |
4588ec20 JB |
7155 | Vglyph_table = Qnil; |
7156 | ||
7ee72033 | 7157 | DEFVAR_LISP ("standard-display-table", &Vstandard_display_table, |
bacf09b4 | 7158 | doc: /* Display table to use for buffers that specify none. |
228299fa | 7159 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
7160 | Vstandard_display_table = Qnil; |
7161 | ||
7ee72033 | 7162 | DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause, |
bacf09b4 | 7163 | doc: /* *Non-nil means update isn't paused when input is detected. */); |
5f5c8ee5 GM |
7164 | redisplay_dont_pause = 0; |
7165 | ||
d012c62b KS |
7166 | #if PERIODIC_PREEMPTION_CHECKING |
7167 | DEFVAR_LISP ("redisplay-preemption-period", &Vredisplay_preemption_period, | |
7168 | doc: /* *The period in seconds between checking for input during redisplay. | |
7169 | If input is detected, redisplay is pre-empted, and the input is processed. | |
7170 | If nil, never pre-empt redisplay. */); | |
7171 | Vredisplay_preemption_period = make_float (0.10); | |
7172 | #endif | |
7173 | ||
4588ec20 JB |
7174 | #ifdef CANNOT_DUMP |
7175 | if (noninteractive) | |
7176 | #endif | |
7177 | { | |
2246281f | 7178 | Vinitial_window_system = Qnil; |
4588ec20 JB |
7179 | Vwindow_system_version = Qnil; |
7180 | } | |
7181 | } | |
6b61353c KH |
7182 | |
7183 | /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413 | |
7184 | (do not change this comment) */ |