Commit | Line | Data |
---|---|---|
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, | |
8cabe764 | 4 | 2004, 2005, 2006, 2007, 2008 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 | ||
e0f712ba | 62 | #ifdef MAC_OS |
1a578e9b | 63 | #include "macterm.h" |
e0f712ba | 64 | #endif /* MAC_OS */ |
1a578e9b | 65 | |
edfda783 AR |
66 | #ifdef HAVE_NS |
67 | #include "nsterm.h" | |
68 | #endif | |
69 | ||
5f5c8ee5 | 70 | /* Include systime.h after xterm.h to avoid double inclusion of time.h. */ |
6cbd1643 | 71 | |
5f5c8ee5 | 72 | #include "systime.h" |
3883a901 RS |
73 | #include <errno.h> |
74 | ||
5f5c8ee5 GM |
75 | /* To get the prototype for `sleep'. */ |
76 | ||
77 | #ifdef HAVE_UNISTD_H | |
78 | #include <unistd.h> | |
79 | #endif | |
80 | ||
4588ec20 | 81 | /* Get number of chars of output now in the buffer of a stdio stream. |
5f5c8ee5 GM |
82 | This ought to be built in in stdio, but it isn't. Some s- files |
83 | override this because their stdio internals differ. */ | |
84 | ||
e3271ae5 | 85 | #ifdef __GNU_LIBRARY__ |
5f5c8ee5 GM |
86 | |
87 | /* The s- file might have overridden the definition with one that | |
88 | works for the system's C library. But we are using the GNU C | |
89 | library, so this is the right definition for every system. */ | |
90 | ||
3883a901 RS |
91 | #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT |
92 | #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT | |
93 | #else | |
cb5558ff | 94 | #undef PENDING_OUTPUT_COUNT |
e3271ae5 | 95 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer) |
3883a901 RS |
96 | #endif |
97 | #else /* not __GNU_LIBRARY__ */ | |
68c45bf0 PE |
98 | #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING |
99 | #include <stdio_ext.h> | |
100 | #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE) | |
101 | #endif | |
cb5558ff | 102 | #ifndef PENDING_OUTPUT_COUNT |
4588ec20 JB |
103 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) |
104 | #endif | |
5f5c8ee5 GM |
105 | #endif /* not __GNU_LIBRARY__ */ |
106 | ||
8a2a6032 | 107 | #if defined(HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES) |
fa0ec9f4 DL |
108 | #include <term.h> /* for tgetent */ |
109 | #endif | |
5f5c8ee5 GM |
110 | \f |
111 | /* Structure to pass dimensions around. Used for character bounding | |
112 | boxes, glyph matrix dimensions and alike. */ | |
113 | ||
114 | struct dim | |
115 | { | |
116 | int width; | |
117 | int height; | |
118 | }; | |
119 | ||
120 | \f | |
121 | /* Function prototypes. */ | |
122 | ||
bccee4f2 GM |
123 | static struct glyph_matrix *save_current_matrix P_ ((struct frame *)); |
124 | static void restore_current_matrix P_ ((struct frame *, struct glyph_matrix *)); | |
075757cc | 125 | static int showing_window_margins_p P_ ((struct window *)); |
c9f00270 | 126 | static void fake_current_matrices P_ ((Lisp_Object)); |
408f5064 GM |
127 | static void redraw_overlapping_rows P_ ((struct window *, int)); |
128 | static void redraw_overlapped_rows P_ ((struct window *, int)); | |
5f5c8ee5 GM |
129 | static int count_blanks P_ ((struct glyph *, int)); |
130 | static int count_match P_ ((struct glyph *, struct glyph *, | |
131 | struct glyph *, struct glyph *)); | |
132 | static unsigned line_draw_cost P_ ((struct glyph_matrix *, int)); | |
133 | static void update_frame_line P_ ((struct frame *, int)); | |
134 | static struct dim allocate_matrices_for_frame_redisplay | |
5d3cc43c GM |
135 | P_ ((Lisp_Object, int, int, int, int *)); |
136 | static void allocate_matrices_for_window_redisplay P_ ((struct window *)); | |
5f5c8ee5 GM |
137 | static int realloc_glyph_pool P_ ((struct glyph_pool *, struct dim)); |
138 | static void adjust_frame_glyphs P_ ((struct frame *)); | |
139 | struct glyph_matrix *new_glyph_matrix P_ ((struct glyph_pool *)); | |
140 | static void free_glyph_matrix P_ ((struct glyph_matrix *)); | |
141 | static void adjust_glyph_matrix P_ ((struct window *, struct glyph_matrix *, | |
142 | int, int, struct dim)); | |
b96fd3e8 | 143 | static void change_frame_size_1 P_ ((struct frame *, int, int, int, int, int)); |
5f5c8ee5 | 144 | static void swap_glyph_pointers P_ ((struct glyph_row *, struct glyph_row *)); |
f1d2ce7f | 145 | #if GLYPH_DEBUG |
5f5c8ee5 | 146 | static int glyph_row_slice_p P_ ((struct glyph_row *, struct glyph_row *)); |
9339e87f | 147 | #endif |
5f5c8ee5 GM |
148 | static void fill_up_frame_row_with_spaces P_ ((struct glyph_row *, int)); |
149 | static void build_frame_matrix_from_window_tree P_ ((struct glyph_matrix *, | |
150 | struct window *)); | |
151 | static void build_frame_matrix_from_leaf_window P_ ((struct glyph_matrix *, | |
152 | struct window *)); | |
153 | static struct glyph_pool *new_glyph_pool P_ ((void)); | |
154 | static void free_glyph_pool P_ ((struct glyph_pool *)); | |
155 | static void adjust_frame_glyphs_initially P_ ((void)); | |
156 | static void adjust_frame_message_buffer P_ ((struct frame *)); | |
157 | static void adjust_decode_mode_spec_buffer P_ ((struct frame *)); | |
158 | static void fill_up_glyph_row_with_spaces P_ ((struct glyph_row *)); | |
159 | static void build_frame_matrix P_ ((struct frame *)); | |
160 | void clear_current_matrices P_ ((struct frame *)); | |
161 | void scroll_glyph_matrix_range P_ ((struct glyph_matrix *, int, int, | |
162 | int, int)); | |
163 | static void clear_window_matrices P_ ((struct window *, int)); | |
164 | static void fill_up_glyph_row_area_with_spaces P_ ((struct glyph_row *, int)); | |
165 | static int scrolling_window P_ ((struct window *, int)); | |
e876ff42 | 166 | static int update_window_line P_ ((struct window *, int, int *)); |
5f5c8ee5 | 167 | static void update_marginal_area P_ ((struct window *, int, int)); |
408f5064 | 168 | static int update_text_area P_ ((struct window *, int)); |
5f5c8ee5 GM |
169 | static void make_current P_ ((struct glyph_matrix *, struct glyph_matrix *, |
170 | int)); | |
171 | static void mirror_make_current P_ ((struct window *, int)); | |
172 | void check_window_matrix_pointers P_ ((struct window *)); | |
b96fd3e8 | 173 | #if GLYPH_DEBUG |
5f5c8ee5 GM |
174 | static void check_matrix_pointers P_ ((struct glyph_matrix *, |
175 | struct glyph_matrix *)); | |
b96fd3e8 | 176 | #endif |
5f5c8ee5 GM |
177 | static void mirror_line_dance P_ ((struct window *, int, int, int *, char *)); |
178 | static int update_window_tree P_ ((struct window *, int)); | |
179 | static int update_window P_ ((struct window *, int)); | |
180 | static int update_frame_1 P_ ((struct frame *, int, int)); | |
181 | static void set_window_cursor_after_update P_ ((struct window *)); | |
182 | static int row_equal_p P_ ((struct window *, struct glyph_row *, | |
e4e0bee9 | 183 | struct glyph_row *, int)); |
5f5c8ee5 GM |
184 | static void adjust_frame_glyphs_for_window_redisplay P_ ((struct frame *)); |
185 | static void adjust_frame_glyphs_for_frame_redisplay P_ ((struct frame *)); | |
186 | static void reverse_rows P_ ((struct glyph_matrix *, int, int)); | |
187 | static int margin_glyphs_to_reserve P_ ((struct window *, int, Lisp_Object)); | |
a13396c9 GM |
188 | static void sync_window_with_frame_matrix_rows P_ ((struct window *)); |
189 | struct window *frame_row_to_window P_ ((struct window *, int)); | |
5f5c8ee5 | 190 | |
5f5c8ee5 GM |
191 | \f |
192 | /* Non-zero means don't pause redisplay for pending input. (This is | |
193 | for debugging and for a future implementation of EDT-like | |
194 | scrolling. */ | |
4588ec20 | 195 | |
5f5c8ee5 | 196 | int redisplay_dont_pause; |
45140e01 | 197 | |
d012c62b KS |
198 | /* Define PERIODIC_PREEMPTION_CHECKING to 1, if micro-second timers |
199 | are supported, so we can check for input during redisplay at | |
200 | regular intervals. */ | |
201 | #ifdef EMACS_HAS_USECS | |
202 | #define PERIODIC_PREEMPTION_CHECKING 1 | |
203 | #else | |
204 | #define PERIODIC_PREEMPTION_CHECKING 0 | |
205 | #endif | |
206 | ||
207 | #if PERIODIC_PREEMPTION_CHECKING | |
208 | ||
209 | /* If a number (float), check for user input every N seconds. */ | |
210 | ||
211 | Lisp_Object Vredisplay_preemption_period; | |
212 | ||
213 | /* Redisplay preemption timers. */ | |
214 | ||
215 | static EMACS_TIME preemption_period; | |
216 | static EMACS_TIME preemption_next_check; | |
217 | ||
218 | #endif | |
219 | ||
a41f8bed | 220 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 221 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 222 | |
502b9b64 | 223 | int frame_garbaged; |
4588ec20 | 224 | |
5f5c8ee5 | 225 | /* Nonzero means last display completed. Zero means it was preempted. */ |
4588ec20 JB |
226 | |
227 | int display_completed; | |
228 | ||
5f5c8ee5 GM |
229 | /* Lisp variable visible-bell; enables use of screen-flash instead of |
230 | audible bell. */ | |
4588ec20 JB |
231 | |
232 | int visible_bell; | |
233 | ||
502b9b64 | 234 | /* Invert the color of the whole frame, at a low level. */ |
4588ec20 JB |
235 | |
236 | int inverse_video; | |
237 | ||
238 | /* Line speed of the terminal. */ | |
239 | ||
31ade731 | 240 | EMACS_INT baud_rate; |
4588ec20 | 241 | |
5f5c8ee5 | 242 | /* Either nil or a symbol naming the window system under which Emacs |
2246281f | 243 | creates the first frame. */ |
4588ec20 | 244 | |
2246281f | 245 | Lisp_Object Vinitial_window_system; |
4588ec20 JB |
246 | |
247 | /* Version number of X windows: 10, 11 or nil. */ | |
5f5c8ee5 | 248 | |
4588ec20 JB |
249 | Lisp_Object Vwindow_system_version; |
250 | ||
5f5c8ee5 GM |
251 | /* Vector of glyph definitions. Indexed by glyph number, the contents |
252 | are a string which is how to output the glyph. | |
4588ec20 JB |
253 | |
254 | If Vglyph_table is nil, a glyph is output by using its low 8 bits | |
5f5c8ee5 GM |
255 | as a character code. |
256 | ||
257 | This is an obsolete feature that is no longer used. The variable | |
258 | is retained for compatibility. */ | |
4588ec20 JB |
259 | |
260 | Lisp_Object Vglyph_table; | |
261 | ||
262 | /* Display table to use for vectors that don't specify their own. */ | |
263 | ||
264 | Lisp_Object Vstandard_display_table; | |
265 | ||
5f5c8ee5 | 266 | /* Nonzero means reading single-character input with prompt so put |
153a073c | 267 | cursor on mini-buffer after the prompt. Positive means at end of |
5f5c8ee5 GM |
268 | text in echo area; negative means at beginning of line. */ |
269 | ||
4588ec20 | 270 | int cursor_in_echo_area; |
9cda4f7c | 271 | |
e7067d00 | 272 | Lisp_Object Qdisplay_table, Qredisplay_dont_pause; |
5f5c8ee5 | 273 | |
4588ec20 | 274 | \f |
5f5c8ee5 | 275 | /* The currently selected frame. In a single-frame version, this |
91fb7e1b | 276 | variable always equals the_only_frame. */ |
4588ec20 | 277 | |
91fb7e1b | 278 | Lisp_Object selected_frame; |
4588ec20 | 279 | |
5f5c8ee5 | 280 | /* A frame which is not just a mini-buffer, or 0 if there are no such |
502b9b64 | 281 | frames. This is usually the most recent such frame that was |
87485d6f MW |
282 | selected. In a single-frame version, this variable always holds |
283 | the address of the_only_frame. */ | |
4588ec20 | 284 | |
5f5c8ee5 | 285 | struct frame *last_nonminibuf_frame; |
d52bad65 | 286 | |
5f5c8ee5 | 287 | /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 288 | |
5f5c8ee5 | 289 | int delayed_size_change; |
4588ec20 | 290 | |
5f5c8ee5 | 291 | /* 1 means glyph initialization has been completed at startup. */ |
4588ec20 | 292 | |
5f5c8ee5 | 293 | static int glyphs_initialized_initially_p; |
4588ec20 | 294 | |
5f5c8ee5 | 295 | /* Updated window if != 0. Set by update_window. */ |
4588ec20 | 296 | |
5f5c8ee5 | 297 | struct window *updated_window; |
4588ec20 | 298 | |
5f5c8ee5 | 299 | /* Glyph row updated in update_window_line, and area that is updated. */ |
4588ec20 | 300 | |
5f5c8ee5 GM |
301 | struct glyph_row *updated_row; |
302 | int updated_area; | |
4588ec20 | 303 | |
5f5c8ee5 | 304 | /* A glyph for a space. */ |
4588ec20 | 305 | |
5f5c8ee5 | 306 | struct glyph space_glyph; |
4588ec20 | 307 | |
5f5c8ee5 GM |
308 | /* Non-zero means update has been performed directly, so that there's |
309 | no need for redisplay_internal to do much work. Set by | |
310 | direct_output_for_insert. */ | |
4588ec20 | 311 | |
5f5c8ee5 | 312 | int redisplay_performed_directly_p; |
4588ec20 | 313 | |
5f5c8ee5 GM |
314 | /* Counts of allocated structures. These counts serve to diagnose |
315 | memory leaks and double frees. */ | |
4588ec20 | 316 | |
5f5c8ee5 GM |
317 | int glyph_matrix_count; |
318 | int glyph_pool_count; | |
4588ec20 | 319 | |
5f5c8ee5 GM |
320 | /* If non-null, the frame whose frame matrices are manipulated. If |
321 | null, window matrices are worked on. */ | |
4588ec20 | 322 | |
5f5c8ee5 | 323 | static struct frame *frame_matrix_frame; |
4588ec20 | 324 | |
5f5c8ee5 GM |
325 | /* Non-zero means that fonts have been loaded since the last glyph |
326 | matrix adjustments. Redisplay must stop, and glyph matrices must | |
327 | be adjusted when this flag becomes non-zero during display. The | |
328 | reason fonts can be loaded so late is that fonts of fontsets are | |
3aa9f0c4 KH |
329 | loaded on demand. Another reason is that a line contains many |
330 | characters displayed by zero width or very narrow glyphs of | |
331 | variable-width fonts. */ | |
836d2cde | 332 | |
5f5c8ee5 | 333 | int fonts_changed_p; |
836d2cde | 334 | |
177c0ea7 | 335 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 336 | This may only be used for terminal frames. */ |
836d2cde | 337 | |
5f5c8ee5 | 338 | #if GLYPH_DEBUG |
4588ec20 | 339 | |
5f5c8ee5 GM |
340 | static int window_to_frame_vpos P_ ((struct window *, int)); |
341 | static int window_to_frame_hpos P_ ((struct window *, int)); | |
342 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) | |
343 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 344 | |
9b0e97aa GM |
345 | /* One element of the ring buffer containing redisplay history |
346 | information. */ | |
347 | ||
348 | struct redisplay_history | |
349 | { | |
350 | char trace[512 + 100]; | |
351 | }; | |
352 | ||
353 | /* The size of the history buffer. */ | |
354 | ||
355 | #define REDISPLAY_HISTORY_SIZE 30 | |
356 | ||
357 | /* The redisplay history buffer. */ | |
358 | ||
359 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
360 | ||
361 | /* Next free entry in redisplay_history. */ | |
362 | ||
363 | static int history_idx; | |
364 | ||
365 | /* A tick that's incremented each time something is added to the | |
366 | history. */ | |
367 | ||
368 | static unsigned history_tick; | |
369 | ||
370 | static void add_frame_display_history P_ ((struct frame *, int)); | |
371 | static void add_window_display_history P_ ((struct window *, char *, int)); | |
6a8aec41 | 372 | \f |
9b0e97aa GM |
373 | /* Add to the redisplay history how window W has been displayed. |
374 | MSG is a trace containing the information how W's glyph matrix | |
153a073c | 375 | has been constructed. PAUSED_P non-zero means that the update |
9b0e97aa GM |
376 | has been interrupted for pending input. */ |
377 | ||
378 | static void | |
379 | add_window_display_history (w, msg, paused_p) | |
380 | struct window *w; | |
381 | char *msg; | |
382 | int paused_p; | |
383 | { | |
384 | char *buf; | |
177c0ea7 | 385 | |
9b0e97aa GM |
386 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
387 | history_idx = 0; | |
388 | buf = redisplay_history[history_idx].trace; | |
389 | ++history_idx; | |
177c0ea7 | 390 | |
9b0e97aa GM |
391 | sprintf (buf, "%d: window %p (`%s')%s\n", |
392 | history_tick++, | |
393 | w, | |
394 | ((BUFFERP (w->buffer) | |
395 | && STRINGP (XBUFFER (w->buffer)->name)) | |
d5db4077 | 396 | ? (char *) SDATA (XBUFFER (w->buffer)->name) |
9b0e97aa GM |
397 | : "???"), |
398 | paused_p ? " ***paused***" : ""); | |
399 | strcat (buf, msg); | |
400 | } | |
401 | ||
402 | ||
403 | /* Add to the redisplay history that frame F has been displayed. | |
404 | PAUSED_P non-zero means that the update has been interrupted for | |
405 | pending input. */ | |
406 | ||
407 | static void | |
408 | add_frame_display_history (f, paused_p) | |
409 | struct frame *f; | |
410 | int paused_p; | |
411 | { | |
412 | char *buf; | |
177c0ea7 | 413 | |
9b0e97aa GM |
414 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
415 | history_idx = 0; | |
416 | buf = redisplay_history[history_idx].trace; | |
417 | ++history_idx; | |
177c0ea7 | 418 | |
9b0e97aa GM |
419 | sprintf (buf, "%d: update frame %p%s", |
420 | history_tick++, | |
421 | f, paused_p ? " ***paused***" : ""); | |
422 | } | |
423 | ||
424 | ||
425 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, | |
426 | Sdump_redisplay_history, 0, 0, "", | |
7ee72033 MB |
427 | doc: /* Dump redisplay history to stderr. */) |
428 | () | |
9b0e97aa GM |
429 | { |
430 | int i; | |
431 | ||
432 | for (i = history_idx - 1; i != history_idx; --i) | |
433 | { | |
434 | if (i < 0) | |
435 | i = REDISPLAY_HISTORY_SIZE - 1; | |
436 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
437 | } | |
438 | ||
439 | return Qnil; | |
440 | } | |
441 | ||
442 | ||
5f5c8ee5 | 443 | #else /* GLYPH_DEBUG == 0 */ |
4588ec20 | 444 | |
7df02016 KS |
445 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
446 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 447 | |
5f5c8ee5 | 448 | #endif /* GLYPH_DEBUG == 0 */ |
4588ec20 | 449 | |
4588ec20 | 450 | |
5f5c8ee5 GM |
451 | /* Like bcopy except never gets confused by overlap. Let this be the |
452 | first function defined in this file, or change emacs.c where the | |
453 | address of this function is used. */ | |
4588ec20 JB |
454 | |
455 | void | |
456 | safe_bcopy (from, to, size) | |
ea64076a KR |
457 | const char *from; |
458 | char *to; | |
4588ec20 JB |
459 | int size; |
460 | { | |
b5c685f4 | 461 | if (size <= 0 || from == to) |
4588ec20 JB |
462 | return; |
463 | ||
b5c685f4 JB |
464 | /* If the source and destination don't overlap, then bcopy can |
465 | handle it. If they do overlap, but the destination is lower in | |
466 | memory than the source, we'll assume bcopy can handle that. */ | |
467 | if (to < from || from + size <= to) | |
468 | bcopy (from, to, size); | |
469 | ||
470 | /* Otherwise, we'll copy from the end. */ | |
471 | else | |
4588ec20 | 472 | { |
ea64076a | 473 | register const char *endf = from + size; |
b5c685f4 | 474 | register char *endt = to + size; |
4588ec20 JB |
475 | |
476 | /* If TO - FROM is large, then we should break the copy into | |
477 | nonoverlapping chunks of TO - FROM bytes each. However, if | |
478 | TO - FROM is small, then the bcopy function call overhead | |
479 | makes this not worth it. The crossover point could be about | |
b5c685f4 JB |
480 | anywhere. Since I don't think the obvious copy loop is too |
481 | bad, I'm trying to err in its favor. */ | |
4588ec20 JB |
482 | if (to - from < 64) |
483 | { | |
484 | do | |
485 | *--endt = *--endf; | |
486 | while (endf != from); | |
487 | } | |
488 | else | |
489 | { | |
b5c685f4 | 490 | for (;;) |
4588ec20 JB |
491 | { |
492 | endt -= (to - from); | |
493 | endf -= (to - from); | |
494 | ||
b5c685f4 JB |
495 | if (endt < to) |
496 | break; | |
497 | ||
4588ec20 JB |
498 | bcopy (endf, endt, to - from); |
499 | } | |
b5c685f4 JB |
500 | |
501 | /* If SIZE wasn't a multiple of TO - FROM, there will be a | |
5f5c8ee5 GM |
502 | little left over. The amount left over is (endt + (to - |
503 | from)) - to, which is endt - from. */ | |
4588ec20 JB |
504 | bcopy (from, to, endt - from); |
505 | } | |
506 | } | |
177c0ea7 | 507 | } |
4588ec20 | 508 | |
4588ec20 | 509 | |
5f5c8ee5 GM |
510 | \f |
511 | /*********************************************************************** | |
512 | Glyph Matrices | |
513 | ***********************************************************************/ | |
514 | ||
515 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
516 | pool from which memory for the matrix should be allocated, or null | |
517 | for window-based redisplay where no glyph pools are used. The | |
518 | member `pool' of the glyph matrix structure returned is set to | |
519 | POOL, the structure is otherwise zeroed. */ | |
520 | ||
521 | struct glyph_matrix * | |
522 | new_glyph_matrix (pool) | |
523 | struct glyph_pool *pool; | |
4588ec20 | 524 | { |
5f5c8ee5 GM |
525 | struct glyph_matrix *result; |
526 | ||
527 | /* Allocate and clear. */ | |
528 | result = (struct glyph_matrix *) xmalloc (sizeof *result); | |
529 | bzero (result, sizeof *result); | |
4588ec20 | 530 | |
5f5c8ee5 GM |
531 | /* Increment number of allocated matrices. This count is used |
532 | to detect memory leaks. */ | |
533 | ++glyph_matrix_count; | |
4588ec20 | 534 | |
5f5c8ee5 GM |
535 | /* Set pool and return. */ |
536 | result->pool = pool; | |
537 | return result; | |
4588ec20 JB |
538 | } |
539 | ||
4588ec20 | 540 | |
5f5c8ee5 GM |
541 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
542 | ||
543 | The global counter glyph_matrix_count is decremented when a matrix | |
544 | is freed. If the count gets negative, more structures were freed | |
545 | than allocated, i.e. one matrix was freed more than once or a bogus | |
546 | pointer was passed to this function. | |
177c0ea7 | 547 | |
5f5c8ee5 GM |
548 | If MATRIX->pool is null, this means that the matrix manages its own |
549 | glyph memory---this is done for matrices on X frames. Freeing the | |
550 | matrix also frees the glyph memory in this case. */ | |
551 | ||
552 | static void | |
553 | free_glyph_matrix (matrix) | |
554 | struct glyph_matrix *matrix; | |
4588ec20 | 555 | { |
5f5c8ee5 GM |
556 | if (matrix) |
557 | { | |
558 | int i; | |
559 | ||
560 | /* Detect the case that more matrices are freed than were | |
561 | allocated. */ | |
562 | if (--glyph_matrix_count < 0) | |
563 | abort (); | |
564 | ||
565 | /* Free glyph memory if MATRIX owns it. */ | |
566 | if (matrix->pool == NULL) | |
567 | for (i = 0; i < matrix->rows_allocated; ++i) | |
568 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 569 | |
5f5c8ee5 GM |
570 | /* Free row structures and the matrix itself. */ |
571 | xfree (matrix->rows); | |
572 | xfree (matrix); | |
573 | } | |
574 | } | |
4588ec20 | 575 | |
4588ec20 | 576 | |
5f5c8ee5 GM |
577 | /* Return the number of glyphs to reserve for a marginal area of |
578 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
579 | display line of window W. MARGIN gives the width of the marginal | |
580 | area in canonical character units. MARGIN should be an integer | |
581 | or a float. */ | |
582 | ||
583 | static int | |
584 | margin_glyphs_to_reserve (w, total_glyphs, margin) | |
585 | struct window *w; | |
586 | int total_glyphs; | |
587 | Lisp_Object margin; | |
588 | { | |
589 | int n; | |
4588ec20 | 590 | |
5f5c8ee5 | 591 | if (NUMBERP (margin)) |
4588ec20 | 592 | { |
7df02016 | 593 | int width = XFASTINT (w->total_cols); |
5f5c8ee5 GM |
594 | double d = max (0, XFLOATINT (margin)); |
595 | d = min (width / 2 - 1, d); | |
35ec832e | 596 | n = (int) ((double) total_glyphs / width * d); |
5f5c8ee5 GM |
597 | } |
598 | else | |
599 | n = 0; | |
600 | ||
601 | return n; | |
602 | } | |
603 | ||
4588ec20 | 604 | |
5f5c8ee5 GM |
605 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
606 | window sizes. | |
4588ec20 | 607 | |
5f5c8ee5 GM |
608 | W is null if the function is called for a frame glyph matrix. |
609 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
610 | indices of the first column and row of MATRIX within the frame | |
611 | matrix, if such a matrix exists. They are zero for purely | |
612 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 613 | |
5f5c8ee5 GM |
614 | In window-based redisplay, where no frame matrices exist, glyph |
615 | matrices manage their own glyph storage. Otherwise, they allocate | |
616 | storage from a common frame glyph pool which can be found in | |
617 | MATRIX->pool. | |
23b0200c | 618 | |
5f5c8ee5 GM |
619 | The reason for this memory management strategy is to avoid complete |
620 | frame redraws if possible. When we allocate from a common pool, a | |
621 | change of the location or size of a sub-matrix within the pool | |
622 | requires a complete redisplay of the frame because we cannot easily | |
623 | make sure that the current matrices of all windows still agree with | |
624 | what is displayed on the screen. While this is usually fast, it | |
625 | leads to screen flickering. */ | |
23b0200c | 626 | |
5f5c8ee5 GM |
627 | static void |
628 | adjust_glyph_matrix (w, matrix, x, y, dim) | |
629 | struct window *w; | |
630 | struct glyph_matrix *matrix; | |
631 | int x, y; | |
632 | struct dim dim; | |
633 | { | |
634 | int i; | |
635 | int new_rows; | |
636 | int marginal_areas_changed_p = 0; | |
045dee35 GM |
637 | int header_line_changed_p = 0; |
638 | int header_line_p = 0; | |
5f5c8ee5 | 639 | int left = -1, right = -1; |
ca8a12a7 | 640 | int window_width = -1, window_height = -1; |
5f5c8ee5 | 641 | |
6b61353c KH |
642 | /* See if W had a header line that has disappeared now, or vice versa. |
643 | Get W's size. */ | |
5f5c8ee5 GM |
644 | if (w) |
645 | { | |
6b61353c KH |
646 | window_box (w, -1, 0, 0, &window_width, &window_height); |
647 | ||
045dee35 GM |
648 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
649 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 650 | } |
045dee35 | 651 | matrix->header_line_p = header_line_p; |
23b0200c | 652 | |
6b61353c KH |
653 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
654 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
655 | haven't changed. This optimization is important because preserving |
656 | the matrix means preventing redisplay. */ | |
657 | if (matrix->pool == NULL) | |
658 | { | |
7df02016 KS |
659 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
660 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
5f5c8ee5 GM |
661 | xassert (left >= 0 && right >= 0); |
662 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs | |
663 | || right != matrix->right_margin_glyphs); | |
664 | ||
665 | if (!marginal_areas_changed_p | |
666 | && !fonts_changed_p | |
045dee35 | 667 | && !header_line_changed_p |
7df02016 KS |
668 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
669 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
670 | && matrix->window_height == window_height |
671 | && matrix->window_vscroll == w->vscroll | |
672 | && matrix->window_width == window_width) | |
673 | return; | |
674 | } | |
177c0ea7 | 675 | |
5f5c8ee5 GM |
676 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
677 | if (matrix->rows_allocated < dim.height) | |
678 | { | |
679 | int size = dim.height * sizeof (struct glyph_row); | |
680 | new_rows = dim.height - matrix->rows_allocated; | |
681 | matrix->rows = (struct glyph_row *) xrealloc (matrix->rows, size); | |
682 | bzero (matrix->rows + matrix->rows_allocated, | |
683 | new_rows * sizeof *matrix->rows); | |
684 | matrix->rows_allocated = dim.height; | |
685 | } | |
686 | else | |
687 | new_rows = 0; | |
60a8948a | 688 | |
5f5c8ee5 GM |
689 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
690 | on a frame not using window-based redisplay. Set up pointers for | |
691 | each row into the glyph pool. */ | |
692 | if (matrix->pool) | |
693 | { | |
694 | xassert (matrix->pool->glyphs); | |
177c0ea7 | 695 | |
5f5c8ee5 | 696 | if (w) |
60a8948a | 697 | { |
5f5c8ee5 | 698 | left = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 699 | w->left_margin_cols); |
5f5c8ee5 | 700 | right = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 701 | w->right_margin_cols); |
60a8948a | 702 | } |
5f5c8ee5 GM |
703 | else |
704 | left = right = 0; | |
177c0ea7 | 705 | |
5f5c8ee5 | 706 | for (i = 0; i < dim.height; ++i) |
60a8948a | 707 | { |
5f5c8ee5 | 708 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
709 | |
710 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
711 | = (matrix->pool->glyphs |
712 | + (y + i) * matrix->pool->ncolumns | |
713 | + x); | |
177c0ea7 | 714 | |
5f5c8ee5 GM |
715 | if (w == NULL |
716 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 717 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
718 | { |
719 | row->glyphs[TEXT_AREA] | |
720 | = row->glyphs[LEFT_MARGIN_AREA]; | |
721 | row->glyphs[RIGHT_MARGIN_AREA] | |
722 | = row->glyphs[TEXT_AREA] + dim.width; | |
723 | row->glyphs[LAST_AREA] | |
724 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
725 | } | |
726 | else | |
727 | { | |
728 | row->glyphs[TEXT_AREA] | |
729 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
730 | row->glyphs[RIGHT_MARGIN_AREA] | |
731 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
732 | row->glyphs[LAST_AREA] | |
733 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
734 | } | |
60a8948a | 735 | } |
177c0ea7 | 736 | |
5f5c8ee5 GM |
737 | matrix->left_margin_glyphs = left; |
738 | matrix->right_margin_glyphs = right; | |
739 | } | |
740 | else | |
741 | { | |
742 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
6b61353c KH |
743 | its own memory. It is a window matrix for window-based redisplay. |
744 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
745 | if (dim.width > matrix->matrix_w |
746 | || new_rows | |
045dee35 | 747 | || header_line_changed_p |
5f5c8ee5 | 748 | || marginal_areas_changed_p) |
4588ec20 | 749 | { |
5f5c8ee5 GM |
750 | struct glyph_row *row = matrix->rows; |
751 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 752 | |
5f5c8ee5 GM |
753 | while (row < end) |
754 | { | |
755 | row->glyphs[LEFT_MARGIN_AREA] | |
756 | = (struct glyph *) xrealloc (row->glyphs[LEFT_MARGIN_AREA], | |
757 | (dim.width | |
758 | * sizeof (struct glyph))); | |
177c0ea7 | 759 | |
5f5c8ee5 GM |
760 | /* The mode line never has marginal areas. */ |
761 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 762 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
763 | { |
764 | row->glyphs[TEXT_AREA] | |
765 | = row->glyphs[LEFT_MARGIN_AREA]; | |
766 | row->glyphs[RIGHT_MARGIN_AREA] | |
767 | = row->glyphs[TEXT_AREA] + dim.width; | |
768 | row->glyphs[LAST_AREA] | |
769 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
770 | } | |
771 | else | |
772 | { | |
773 | row->glyphs[TEXT_AREA] | |
774 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
775 | row->glyphs[RIGHT_MARGIN_AREA] | |
776 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
777 | row->glyphs[LAST_AREA] | |
778 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
779 | } | |
780 | ++row; | |
781 | } | |
4588ec20 JB |
782 | } |
783 | ||
5f5c8ee5 GM |
784 | xassert (left >= 0 && right >= 0); |
785 | matrix->left_margin_glyphs = left; | |
786 | matrix->right_margin_glyphs = right; | |
787 | } | |
177c0ea7 | 788 | |
5f5c8ee5 GM |
789 | /* Number of rows to be used by MATRIX. */ |
790 | matrix->nrows = dim.height; | |
3ed36514 | 791 | xassert (matrix->nrows >= 0); |
5f5c8ee5 | 792 | |
b7b20fbd | 793 | if (w) |
5f5c8ee5 | 794 | { |
b7b20fbd | 795 | if (matrix == w->current_matrix) |
4588ec20 | 796 | { |
b7b20fbd GM |
797 | /* Mark rows in a current matrix of a window as not having |
798 | valid contents. It's important to not do this for | |
799 | desired matrices. When Emacs starts, it may already be | |
800 | building desired matrices when this function runs. */ | |
801 | if (window_width < 0) | |
802 | window_width = window_box_width (w, -1); | |
177c0ea7 | 803 | |
b7b20fbd GM |
804 | /* Optimize the case that only the height has changed (C-x 2, |
805 | upper window). Invalidate all rows that are no longer part | |
806 | of the window. */ | |
807 | if (!marginal_areas_changed_p | |
73d75a62 GM |
808 | && !header_line_changed_p |
809 | && new_rows == 0 | |
810 | && dim.width == matrix->matrix_w | |
7df02016 KS |
811 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
812 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 813 | && matrix->window_width == window_width) |
b7b20fbd | 814 | { |
dd42b31a GM |
815 | /* Find the last row in the window. */ |
816 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
817 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
818 | { | |
26447967 | 819 | ++i; |
dd42b31a GM |
820 | break; |
821 | } | |
b7b20fbd GM |
822 | |
823 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 824 | are invalidated below. */ |
b7b20fbd GM |
825 | if (INTEGERP (w->window_end_vpos) |
826 | && XFASTINT (w->window_end_vpos) >= i) | |
827 | w->window_end_valid = Qnil; | |
177c0ea7 | 828 | |
b7b20fbd GM |
829 | while (i < matrix->nrows) |
830 | matrix->rows[i++].enabled_p = 0; | |
831 | } | |
832 | else | |
833 | { | |
834 | for (i = 0; i < matrix->nrows; ++i) | |
835 | matrix->rows[i].enabled_p = 0; | |
836 | } | |
5f5c8ee5 | 837 | } |
b7b20fbd | 838 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 839 | { |
b7b20fbd GM |
840 | /* Rows in desired matrices always have to be cleared; |
841 | redisplay expects this is the case when it runs, so it | |
842 | had better be the case when we adjust matrices between | |
843 | redisplays. */ | |
5f5c8ee5 GM |
844 | for (i = 0; i < matrix->nrows; ++i) |
845 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 846 | } |
4588ec20 | 847 | } |
177c0ea7 JB |
848 | |
849 | ||
5f5c8ee5 GM |
850 | /* Remember last values to be able to optimize frame redraws. */ |
851 | matrix->matrix_x = x; | |
852 | matrix->matrix_y = y; | |
853 | matrix->matrix_w = dim.width; | |
854 | matrix->matrix_h = dim.height; | |
855 | ||
856 | /* Record the top y location and height of W at the time the matrix | |
857 | was last adjusted. This is used to optimize redisplay above. */ | |
858 | if (w) | |
4588ec20 | 859 | { |
7df02016 KS |
860 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
861 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
862 | matrix->window_height = window_height; |
863 | matrix->window_width = window_width; | |
864 | matrix->window_vscroll = w->vscroll; | |
865 | } | |
866 | } | |
4588ec20 | 867 | |
4588ec20 | 868 | |
5f5c8ee5 GM |
869 | /* Reverse the contents of rows in MATRIX between START and END. The |
870 | contents of the row at END - 1 end up at START, END - 2 at START + | |
871 | 1 etc. This is part of the implementation of rotate_matrix (see | |
872 | below). */ | |
d52bad65 | 873 | |
5f5c8ee5 GM |
874 | static void |
875 | reverse_rows (matrix, start, end) | |
876 | struct glyph_matrix *matrix; | |
877 | int start, end; | |
878 | { | |
879 | int i, j; | |
23b0200c | 880 | |
5f5c8ee5 GM |
881 | for (i = start, j = end - 1; i < j; ++i, --j) |
882 | { | |
883 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
884 | initialization. */ | |
885 | struct glyph_row temp; | |
886 | temp = matrix->rows[i]; | |
887 | matrix->rows[i] = matrix->rows[j]; | |
888 | matrix->rows[j] = temp; | |
889 | } | |
890 | } | |
23b0200c | 891 | |
23b0200c | 892 | |
5f5c8ee5 GM |
893 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
894 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
895 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
896 | row structures are moved around). | |
60a8948a | 897 | |
5f5c8ee5 GM |
898 | The algorithm used for rotating the vector was, I believe, first |
899 | described by Kernighan. See the vector R as consisting of two | |
900 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
901 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
902 | and reverse the result to get (ArBr)r which is BA. Similar for | |
903 | rotating right. */ | |
904 | ||
905 | void | |
906 | rotate_matrix (matrix, first, last, by) | |
907 | struct glyph_matrix *matrix; | |
908 | int first, last, by; | |
909 | { | |
910 | if (by < 0) | |
911 | { | |
912 | /* Up (rotate left, i.e. towards lower indices). */ | |
913 | by = -by; | |
914 | reverse_rows (matrix, first, first + by); | |
915 | reverse_rows (matrix, first + by, last); | |
916 | reverse_rows (matrix, first, last); | |
917 | } | |
918 | else if (by > 0) | |
919 | { | |
920 | /* Down (rotate right, i.e. towards higher indices). */ | |
921 | reverse_rows (matrix, last - by, last); | |
922 | reverse_rows (matrix, first, last - by); | |
923 | reverse_rows (matrix, first, last); | |
924 | } | |
925 | } | |
926 | ||
927 | ||
928 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
929 | with indices START <= index < END. Increment positions by DELTA/ | |
930 | DELTA_BYTES. */ | |
931 | ||
932 | void | |
86c11ba1 | 933 | increment_matrix_positions (matrix, start, end, delta, delta_bytes) |
5f5c8ee5 GM |
934 | struct glyph_matrix *matrix; |
935 | int start, end, delta, delta_bytes; | |
936 | { | |
937 | /* Check that START and END are reasonable values. */ | |
938 | xassert (start >= 0 && start <= matrix->nrows); | |
939 | xassert (end >= 0 && end <= matrix->nrows); | |
940 | xassert (start <= end); | |
941 | ||
942 | for (; start < end; ++start) | |
86c11ba1 | 943 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
944 | } |
945 | ||
946 | ||
947 | /* Enable a range of rows in glyph matrix MATRIX. START and END are | |
948 | the row indices of the first and last + 1 row to enable. If | |
949 | ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */ | |
950 | ||
951 | void | |
952 | enable_glyph_matrix_rows (matrix, start, end, enabled_p) | |
953 | struct glyph_matrix *matrix; | |
954 | int start, end; | |
955 | int enabled_p; | |
956 | { | |
3ed36514 GM |
957 | xassert (start <= end); |
958 | xassert (start >= 0 && start < matrix->nrows); | |
959 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 960 | |
5f5c8ee5 GM |
961 | for (; start < end; ++start) |
962 | matrix->rows[start].enabled_p = enabled_p != 0; | |
963 | } | |
964 | ||
965 | ||
966 | /* Clear MATRIX. | |
967 | ||
968 | This empties all rows in MATRIX by setting the enabled_p flag for | |
969 | all rows of the matrix to zero. The function prepare_desired_row | |
970 | will eventually really clear a row when it sees one with a zero | |
971 | enabled_p flag. | |
972 | ||
973 | Resets update hints to defaults value. The only update hint | |
974 | currently present is the flag MATRIX->no_scrolling_p. */ | |
975 | ||
976 | void | |
977 | clear_glyph_matrix (matrix) | |
978 | struct glyph_matrix *matrix; | |
979 | { | |
980 | if (matrix) | |
981 | { | |
982 | enable_glyph_matrix_rows (matrix, 0, matrix->nrows, 0); | |
983 | matrix->no_scrolling_p = 0; | |
984 | } | |
985 | } | |
177c0ea7 | 986 | |
5f5c8ee5 GM |
987 | |
988 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
989 | Increment y-positions in glyph rows between START and END by DY, | |
990 | and recompute their visible height. */ | |
991 | ||
992 | void | |
993 | shift_glyph_matrix (w, matrix, start, end, dy) | |
994 | struct window *w; | |
995 | struct glyph_matrix *matrix; | |
996 | int start, end, dy; | |
997 | { | |
998 | int min_y, max_y; | |
177c0ea7 | 999 | |
5f5c8ee5 GM |
1000 | xassert (start <= end); |
1001 | xassert (start >= 0 && start < matrix->nrows); | |
1002 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 1003 | |
7df02016 KS |
1004 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
1005 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 1006 | |
5f5c8ee5 GM |
1007 | for (; start < end; ++start) |
1008 | { | |
1009 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 1010 | |
5f5c8ee5 | 1011 | row->y += dy; |
d6c747a4 | 1012 | row->visible_height = row->height; |
177c0ea7 | 1013 | |
5f5c8ee5 | 1014 | if (row->y < min_y) |
d6c747a4 GM |
1015 | row->visible_height -= min_y - row->y; |
1016 | if (row->y + row->height > max_y) | |
1017 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
1018 | } |
1019 | } | |
1020 | ||
1021 | ||
1022 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
1023 | invalid is done by setting enabled_p to zero for all rows in a | |
1024 | current matrix. */ | |
1025 | ||
1026 | void | |
1027 | clear_current_matrices (f) | |
1028 | register struct frame *f; | |
1029 | { | |
1030 | /* Clear frame current matrix, if we have one. */ | |
1031 | if (f->current_matrix) | |
1032 | clear_glyph_matrix (f->current_matrix); | |
1033 | ||
1034 | /* Clear the matrix of the menu bar window, if such a window exists. | |
1035 | The menu bar window is currently used to display menus on X when | |
1036 | no toolkit support is compiled in. */ | |
1037 | if (WINDOWP (f->menu_bar_window)) | |
1038 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
1039 | ||
9ea173e8 GM |
1040 | /* Clear the matrix of the tool-bar window, if any. */ |
1041 | if (WINDOWP (f->tool_bar_window)) | |
1042 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
5f5c8ee5 GM |
1043 | |
1044 | /* Clear current window matrices. */ | |
1045 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
1046 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); | |
1047 | } | |
1048 | ||
1049 | ||
1050 | /* Clear out all display lines of F for a coming redisplay. */ | |
1051 | ||
1052 | void | |
1053 | clear_desired_matrices (f) | |
1054 | register struct frame *f; | |
1055 | { | |
1056 | if (f->desired_matrix) | |
1057 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 1058 | |
5f5c8ee5 GM |
1059 | if (WINDOWP (f->menu_bar_window)) |
1060 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
1061 | ||
9ea173e8 GM |
1062 | if (WINDOWP (f->tool_bar_window)) |
1063 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
5f5c8ee5 GM |
1064 | |
1065 | /* Do it for window matrices. */ | |
1066 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
1067 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
1068 | } | |
1069 | ||
1070 | ||
1071 | /* Clear matrices in window tree rooted in W. If DESIRED_P is | |
1072 | non-zero clear desired matrices, otherwise clear current matrices. */ | |
1073 | ||
1074 | static void | |
1075 | clear_window_matrices (w, desired_p) | |
1076 | struct window *w; | |
1077 | int desired_p; | |
1078 | { | |
1079 | while (w) | |
1080 | { | |
1081 | if (!NILP (w->hchild)) | |
1082 | { | |
1083 | xassert (WINDOWP (w->hchild)); | |
1084 | clear_window_matrices (XWINDOW (w->hchild), desired_p); | |
1085 | } | |
1086 | else if (!NILP (w->vchild)) | |
1087 | { | |
1088 | xassert (WINDOWP (w->vchild)); | |
1089 | clear_window_matrices (XWINDOW (w->vchild), desired_p); | |
1090 | } | |
1091 | else | |
1092 | { | |
1093 | if (desired_p) | |
1094 | clear_glyph_matrix (w->desired_matrix); | |
1095 | else | |
1096 | { | |
1097 | clear_glyph_matrix (w->current_matrix); | |
1098 | w->window_end_valid = Qnil; | |
1099 | } | |
1100 | } | |
1101 | ||
1102 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
1103 | } | |
1104 | } | |
1105 | ||
1106 | ||
1107 | \f | |
1108 | /*********************************************************************** | |
1109 | Glyph Rows | |
1110 | ||
1111 | See dispextern.h for an overall explanation of glyph rows. | |
1112 | ***********************************************************************/ | |
1113 | ||
1114 | /* Clear glyph row ROW. Do it in a way that makes it robust against | |
1115 | changes in the glyph_row structure, i.e. addition or removal of | |
1116 | structure members. */ | |
1117 | ||
2cca872d KH |
1118 | static struct glyph_row null_row; |
1119 | ||
5f5c8ee5 GM |
1120 | void |
1121 | clear_glyph_row (row) | |
1122 | struct glyph_row *row; | |
1123 | { | |
1124 | struct glyph *p[1 + LAST_AREA]; | |
5f5c8ee5 GM |
1125 | |
1126 | /* Save pointers. */ | |
1127 | p[LEFT_MARGIN_AREA] = row->glyphs[LEFT_MARGIN_AREA]; | |
1128 | p[TEXT_AREA] = row->glyphs[TEXT_AREA]; | |
1129 | p[RIGHT_MARGIN_AREA] = row->glyphs[RIGHT_MARGIN_AREA]; | |
1130 | p[LAST_AREA] = row->glyphs[LAST_AREA]; | |
1131 | ||
1132 | /* Clear. */ | |
1133 | *row = null_row; | |
1134 | ||
1135 | /* Restore pointers. */ | |
1136 | row->glyphs[LEFT_MARGIN_AREA] = p[LEFT_MARGIN_AREA]; | |
1137 | row->glyphs[TEXT_AREA] = p[TEXT_AREA]; | |
1138 | row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA]; | |
1139 | row->glyphs[LAST_AREA] = p[LAST_AREA]; | |
45560b1a GM |
1140 | |
1141 | #if 0 /* At some point, some bit-fields of struct glyph were not set, | |
1142 | which made glyphs unequal when compared with GLYPH_EQUAL_P. | |
1143 | Redisplay outputs such glyphs, and flickering effects were | |
1144 | the result. This also depended on the contents of memory | |
1145 | returned by xmalloc. If flickering happens again, activate | |
153a073c | 1146 | the code below. If the flickering is gone with that, chances |
45560b1a GM |
1147 | are that the flickering has the same reason as here. */ |
1148 | bzero (p[0], (char *) p[LAST_AREA] - (char *) p[0]); | |
1149 | #endif | |
5f5c8ee5 GM |
1150 | } |
1151 | ||
1152 | ||
1153 | /* Make ROW an empty, enabled row of canonical character height, | |
1154 | in window W starting at y-position Y. */ | |
1155 | ||
1156 | void | |
1157 | blank_row (w, row, y) | |
1158 | struct window *w; | |
1159 | struct glyph_row *row; | |
1160 | int y; | |
1161 | { | |
1162 | int min_y, max_y; | |
177c0ea7 | 1163 | |
7df02016 KS |
1164 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
1165 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 1166 | |
5f5c8ee5 GM |
1167 | clear_glyph_row (row); |
1168 | row->y = y; | |
408f5064 | 1169 | row->ascent = row->phys_ascent = 0; |
7df02016 | 1170 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 1171 | row->visible_height = row->height; |
177c0ea7 | 1172 | |
5f5c8ee5 | 1173 | if (row->y < min_y) |
d6c747a4 GM |
1174 | row->visible_height -= min_y - row->y; |
1175 | if (row->y + row->height > max_y) | |
1176 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
1177 | |
1178 | row->enabled_p = 1; | |
1179 | } | |
1180 | ||
1181 | ||
1182 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
1183 | are the amounts by which to change positions. Note that the first | |
1184 | glyph of the text area of a row can have a buffer position even if | |
1185 | the used count of the text area is zero. Such rows display line | |
1186 | ends. */ | |
1187 | ||
1188 | void | |
86c11ba1 | 1189 | increment_row_positions (row, delta, delta_bytes) |
5f5c8ee5 GM |
1190 | struct glyph_row *row; |
1191 | int delta, delta_bytes; | |
1192 | { | |
1193 | int area, i; | |
1194 | ||
1195 | /* Increment start and end positions. */ | |
1196 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
1197 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
1198 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
1199 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
1200 | ||
5cacdcfd KS |
1201 | if (!row->enabled_p) |
1202 | return; | |
1203 | ||
5f5c8ee5 GM |
1204 | /* Increment positions in glyphs. */ |
1205 | for (area = 0; area < LAST_AREA; ++area) | |
1206 | for (i = 0; i < row->used[area]; ++i) | |
1207 | if (BUFFERP (row->glyphs[area][i].object) | |
1208 | && row->glyphs[area][i].charpos > 0) | |
1209 | row->glyphs[area][i].charpos += delta; | |
1210 | ||
1211 | /* Capture the case of rows displaying a line end. */ | |
1212 | if (row->used[TEXT_AREA] == 0 | |
1213 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1214 | row->glyphs[TEXT_AREA]->charpos += delta; | |
1215 | } | |
1216 | ||
1217 | ||
9af3e742 | 1218 | #if 0 |
5f5c8ee5 GM |
1219 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
1220 | contents, i.e. glyph structure contents are exchanged between A and | |
1221 | B without changing glyph pointers in A and B. */ | |
1222 | ||
1223 | static void | |
1224 | swap_glyphs_in_rows (a, b) | |
1225 | struct glyph_row *a, *b; | |
1226 | { | |
1227 | int area; | |
1228 | ||
1229 | for (area = 0; area < LAST_AREA; ++area) | |
1230 | { | |
1231 | /* Number of glyphs to swap. */ | |
1232 | int max_used = max (a->used[area], b->used[area]); | |
1233 | ||
1234 | /* Start of glyphs in area of row A. */ | |
1235 | struct glyph *glyph_a = a->glyphs[area]; | |
1236 | ||
1237 | /* End + 1 of glyphs in area of row A. */ | |
1238 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
1239 | ||
1240 | /* Start of glyphs in area of row B. */ | |
1241 | struct glyph *glyph_b = b->glyphs[area]; | |
1242 | ||
1243 | while (glyph_a < glyph_a_end) | |
1244 | { | |
1245 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
1246 | initialization. */ | |
1247 | struct glyph temp; | |
1248 | temp = *glyph_a; | |
1249 | *glyph_a = *glyph_b; | |
1250 | *glyph_b = temp; | |
1251 | ++glyph_a; | |
1252 | ++glyph_b; | |
1253 | } | |
1254 | } | |
1255 | } | |
1256 | ||
9af3e742 | 1257 | #endif /* 0 */ |
5f5c8ee5 GM |
1258 | |
1259 | /* Exchange pointers to glyph memory between glyph rows A and B. */ | |
1260 | ||
1261 | static INLINE void | |
1262 | swap_glyph_pointers (a, b) | |
1263 | struct glyph_row *a, *b; | |
1264 | { | |
1265 | int i; | |
1266 | for (i = 0; i < LAST_AREA + 1; ++i) | |
1267 | { | |
1268 | struct glyph *temp = a->glyphs[i]; | |
1269 | a->glyphs[i] = b->glyphs[i]; | |
1270 | b->glyphs[i] = temp; | |
1271 | } | |
1272 | } | |
1273 | ||
1274 | ||
1275 | /* Copy glyph row structure FROM to glyph row structure TO, except | |
1276 | that glyph pointers in the structures are left unchanged. */ | |
1277 | ||
1278 | INLINE void | |
1279 | copy_row_except_pointers (to, from) | |
1280 | struct glyph_row *to, *from; | |
1281 | { | |
1282 | struct glyph *pointers[1 + LAST_AREA]; | |
1283 | ||
1284 | /* Save glyph pointers of TO. */ | |
1285 | bcopy (to->glyphs, pointers, sizeof to->glyphs); | |
1286 | ||
1287 | /* Do a structure assignment. */ | |
1288 | *to = *from; | |
1289 | ||
1290 | /* Restore original pointers of TO. */ | |
1291 | bcopy (pointers, to->glyphs, sizeof to->glyphs); | |
1292 | } | |
1293 | ||
1294 | ||
1295 | /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in | |
1296 | TO and FROM are left unchanged. Glyph contents are copied from the | |
1297 | glyph memory of FROM to the glyph memory of TO. Increment buffer | |
1298 | positions in row TO by DELTA/ DELTA_BYTES. */ | |
1299 | ||
1300 | void | |
1301 | copy_glyph_row_contents (to, from, delta, delta_bytes) | |
1302 | struct glyph_row *to, *from; | |
1303 | int delta, delta_bytes; | |
1304 | { | |
1305 | int area; | |
1306 | ||
1307 | /* This is like a structure assignment TO = FROM, except that | |
1308 | glyph pointers in the rows are left unchanged. */ | |
1309 | copy_row_except_pointers (to, from); | |
1310 | ||
1311 | /* Copy glyphs from FROM to TO. */ | |
1312 | for (area = 0; area < LAST_AREA; ++area) | |
1313 | if (from->used[area]) | |
177c0ea7 | 1314 | bcopy (from->glyphs[area], to->glyphs[area], |
5f5c8ee5 GM |
1315 | from->used[area] * sizeof (struct glyph)); |
1316 | ||
1317 | /* Increment buffer positions in TO by DELTA. */ | |
86c11ba1 | 1318 | increment_row_positions (to, delta, delta_bytes); |
5f5c8ee5 GM |
1319 | } |
1320 | ||
1321 | ||
1322 | /* Assign glyph row FROM to glyph row TO. This works like a structure | |
1323 | assignment TO = FROM, except that glyph pointers are not copied but | |
1324 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1325 | a memory leak. */ | |
1326 | ||
1327 | static INLINE void | |
1328 | assign_row (to, from) | |
1329 | struct glyph_row *to, *from; | |
1330 | { | |
1331 | swap_glyph_pointers (to, from); | |
1332 | copy_row_except_pointers (to, from); | |
1333 | } | |
1334 | ||
1335 | ||
1336 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1337 | a row in a window matrix, is a slice of the glyph memory of the | |
1338 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
1339 | is non-zero if the glyph memory of WINDOW_ROW is part of the glyph | |
1340 | memory of FRAME_ROW. */ | |
1341 | ||
2d5912c1 | 1342 | #if GLYPH_DEBUG |
9339e87f | 1343 | |
5f5c8ee5 GM |
1344 | static int |
1345 | glyph_row_slice_p (window_row, frame_row) | |
1346 | struct glyph_row *window_row, *frame_row; | |
1347 | { | |
1348 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1349 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1350 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1351 | ||
1352 | return (frame_glyph_start <= window_glyph_start | |
1353 | && window_glyph_start < frame_glyph_end); | |
1354 | } | |
1355 | ||
9339e87f | 1356 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1357 | |
9af3e742 GM |
1358 | #if 0 |
1359 | ||
5f5c8ee5 GM |
1360 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1361 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1362 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1363 | ||
1364 | static struct glyph_row * | |
1365 | find_glyph_row_slice (window_matrix, frame_matrix, row) | |
1366 | struct glyph_matrix *window_matrix, *frame_matrix; | |
1367 | int row; | |
1368 | { | |
1369 | int i; | |
1370 | ||
1371 | xassert (row >= 0 && row < frame_matrix->nrows); | |
1372 | ||
1373 | for (i = 0; i < window_matrix->nrows; ++i) | |
1374 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1375 | frame_matrix->rows + row)) | |
1376 | break; | |
1377 | ||
1378 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1379 | } | |
1380 | ||
9af3e742 | 1381 | #endif /* 0 */ |
5f5c8ee5 GM |
1382 | |
1383 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1384 | i.e. they are only marked as to be cleared by setting their | |
1385 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1386 | call to this function really clears it. */ | |
1387 | ||
1388 | void | |
1389 | prepare_desired_row (row) | |
1390 | struct glyph_row *row; | |
1391 | { | |
1392 | if (!row->enabled_p) | |
1393 | { | |
1394 | clear_glyph_row (row); | |
1395 | row->enabled_p = 1; | |
1396 | } | |
1397 | } | |
1398 | ||
1399 | ||
1400 | /* Return a hash code for glyph row ROW. */ | |
1401 | ||
1402 | int | |
1403 | line_hash_code (row) | |
1404 | struct glyph_row *row; | |
1405 | { | |
1406 | int hash = 0; | |
177c0ea7 | 1407 | |
5f5c8ee5 GM |
1408 | if (row->enabled_p) |
1409 | { | |
4cecaab8 MB |
1410 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1411 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1412 | ||
1413 | while (glyph < end) | |
1414 | { | |
1415 | int c = glyph->u.ch; | |
1416 | int face_id = glyph->face_id; | |
daf01701 | 1417 | if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
4cecaab8 MB |
1418 | c -= SPACEGLYPH; |
1419 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1420 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1421 | ++glyph; | |
1422 | } | |
5f5c8ee5 | 1423 | |
4cecaab8 MB |
1424 | if (hash == 0) |
1425 | hash = 1; | |
5f5c8ee5 GM |
1426 | } |
1427 | ||
1428 | return hash; | |
1429 | } | |
1430 | ||
1431 | ||
153a073c | 1432 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1433 | the number of characters in the line. If must_write_spaces is |
1434 | zero, leading and trailing spaces are ignored. */ | |
1435 | ||
1436 | static unsigned int | |
1437 | line_draw_cost (matrix, vpos) | |
1438 | struct glyph_matrix *matrix; | |
1439 | int vpos; | |
1440 | { | |
1441 | struct glyph_row *row = matrix->rows + vpos; | |
1442 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1443 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1444 | int len; | |
1445 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
1446 | int glyph_table_len = GLYPH_TABLE_LENGTH; | |
1447 | ||
1448 | /* Ignore trailing and leading spaces if we can. */ | |
daf01701 | 1449 | if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
5f5c8ee5 GM |
1450 | { |
1451 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1452 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1453 | --end; |
1454 | ||
177c0ea7 | 1455 | /* All blank line. */ |
5f5c8ee5 GM |
1456 | if (end == beg) |
1457 | return 0; | |
1458 | ||
1459 | /* Skip over leading spaces. */ | |
1460 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1461 | ++beg; | |
1462 | } | |
1463 | ||
1464 | /* If we don't have a glyph-table, each glyph is one character, | |
1465 | so return the number of glyphs. */ | |
1466 | if (glyph_table_base == 0) | |
1467 | len = end - beg; | |
1468 | else | |
1469 | { | |
1470 | /* Otherwise, scan the glyphs and accumulate their total length | |
1471 | in LEN. */ | |
1472 | len = 0; | |
1473 | while (beg < end) | |
1474 | { | |
3fc809e2 | 1475 | GLYPH g; |
177c0ea7 | 1476 | |
3fc809e2 KS |
1477 | SET_GLYPH_FROM_CHAR_GLYPH (g, *beg); |
1478 | ||
565b39a8 | 1479 | if (GLYPH_INVALID_P (g) |
42186983 | 1480 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) |
5f5c8ee5 GM |
1481 | len += 1; |
1482 | else | |
1483 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1484 | |
5f5c8ee5 GM |
1485 | ++beg; |
1486 | } | |
1487 | } | |
177c0ea7 | 1488 | |
5f5c8ee5 GM |
1489 | return len; |
1490 | } | |
1491 | ||
1492 | ||
1493 | /* Test two glyph rows A and B for equality. Value is non-zero if A | |
1494 | and B have equal contents. W is the window to which the glyphs | |
1495 | rows A and B belong. It is needed here to test for partial row | |
e4e0bee9 GM |
1496 | visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p |
1497 | flags of A and B, too. */ | |
5f5c8ee5 | 1498 | |
177c0ea7 | 1499 | static INLINE int |
e4e0bee9 | 1500 | row_equal_p (w, a, b, mouse_face_p) |
5f5c8ee5 GM |
1501 | struct window *w; |
1502 | struct glyph_row *a, *b; | |
e4e0bee9 | 1503 | int mouse_face_p; |
5f5c8ee5 GM |
1504 | { |
1505 | if (a == b) | |
1506 | return 1; | |
1507 | else if (a->hash != b->hash) | |
1508 | return 0; | |
1509 | else | |
1510 | { | |
1511 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1512 | int area; | |
1513 | ||
e4e0bee9 GM |
1514 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1515 | return 0; | |
1516 | ||
5f5c8ee5 GM |
1517 | /* Compare glyphs. */ |
1518 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1519 | { | |
1520 | if (a->used[area] != b->used[area]) | |
1521 | return 0; | |
177c0ea7 | 1522 | |
5f5c8ee5 GM |
1523 | a_glyph = a->glyphs[area]; |
1524 | a_end = a_glyph + a->used[area]; | |
1525 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1526 | |
5f5c8ee5 GM |
1527 | while (a_glyph < a_end |
1528 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1529 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1530 | |
5f5c8ee5 GM |
1531 | if (a_glyph != a_end) |
1532 | return 0; | |
1533 | } | |
1534 | ||
6b61353c KH |
1535 | if (a->fill_line_p != b->fill_line_p |
1536 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1537 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
1538 | || a->left_fringe_face_id != b->left_fringe_face_id | |
1539 | || a->right_fringe_bitmap != b->right_fringe_bitmap | |
1540 | || a->right_fringe_face_id != b->right_fringe_face_id | |
3d4a365f | 1541 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
6b61353c | 1542 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1543 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1544 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1545 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
1546 | /* Different partially visible characters on left margin. */ | |
1547 | || a->x != b->x | |
1548 | /* Different height. */ | |
1549 | || a->ascent != b->ascent | |
408f5064 GM |
1550 | || a->phys_ascent != b->phys_ascent |
1551 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1552 | || a->visible_height != b->visible_height) |
1553 | return 0; | |
1554 | } | |
1555 | ||
1556 | return 1; | |
1557 | } | |
1558 | ||
1559 | ||
1560 | \f | |
1561 | /*********************************************************************** | |
1562 | Glyph Pool | |
1563 | ||
1564 | See dispextern.h for an overall explanation of glyph pools. | |
1565 | ***********************************************************************/ | |
1566 | ||
1567 | /* Allocate a glyph_pool structure. The structure returned is | |
1568 | initialized with zeros. The global variable glyph_pool_count is | |
1569 | incremented for each pool allocated. */ | |
1570 | ||
1571 | static struct glyph_pool * | |
1572 | new_glyph_pool () | |
1573 | { | |
1574 | struct glyph_pool *result; | |
1575 | ||
1576 | /* Allocate a new glyph_pool and clear it. */ | |
1577 | result = (struct glyph_pool *) xmalloc (sizeof *result); | |
1578 | bzero (result, sizeof *result); | |
177c0ea7 | 1579 | |
5f5c8ee5 GM |
1580 | /* For memory leak and double deletion checking. */ |
1581 | ++glyph_pool_count; | |
177c0ea7 | 1582 | |
5f5c8ee5 GM |
1583 | return result; |
1584 | } | |
1585 | ||
1586 | ||
1587 | /* Free a glyph_pool structure POOL. The function may be called with | |
1588 | a null POOL pointer. The global variable glyph_pool_count is | |
1589 | decremented with every pool structure freed. If this count gets | |
1590 | negative, more structures were freed than allocated, i.e. one | |
1591 | structure must have been freed more than once or a bogus pointer | |
1592 | was passed to free_glyph_pool. */ | |
1593 | ||
1594 | static void | |
1595 | free_glyph_pool (pool) | |
1596 | struct glyph_pool *pool; | |
1597 | { | |
1598 | if (pool) | |
1599 | { | |
153a073c | 1600 | /* More freed than allocated? */ |
5f5c8ee5 GM |
1601 | --glyph_pool_count; |
1602 | xassert (glyph_pool_count >= 0); | |
1603 | ||
1604 | xfree (pool->glyphs); | |
1605 | xfree (pool); | |
1606 | } | |
1607 | } | |
1608 | ||
1609 | ||
1610 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1611 | columns we need. This function never shrinks a pool. The only | |
1612 | case in which this would make sense, would be when a frame's size | |
1613 | is changed from a large value to a smaller one. But, if someone | |
1614 | does it once, we can expect that he will do it again. | |
1615 | ||
1616 | Value is non-zero if the pool changed in a way which makes | |
1617 | re-adjusting window glyph matrices necessary. */ | |
1618 | ||
1619 | static int | |
1620 | realloc_glyph_pool (pool, matrix_dim) | |
1621 | struct glyph_pool *pool; | |
1622 | struct dim matrix_dim; | |
1623 | { | |
1624 | int needed; | |
1625 | int changed_p; | |
1626 | ||
1627 | changed_p = (pool->glyphs == 0 | |
1628 | || matrix_dim.height != pool->nrows | |
1629 | || matrix_dim.width != pool->ncolumns); | |
1630 | ||
1631 | /* Enlarge the glyph pool. */ | |
1632 | needed = matrix_dim.width * matrix_dim.height; | |
1633 | if (needed > pool->nglyphs) | |
1634 | { | |
1635 | int size = needed * sizeof (struct glyph); | |
1636 | ||
1637 | if (pool->glyphs) | |
1638 | pool->glyphs = (struct glyph *) xrealloc (pool->glyphs, size); | |
1639 | else | |
1640 | { | |
1641 | pool->glyphs = (struct glyph *) xmalloc (size); | |
1642 | bzero (pool->glyphs, size); | |
1643 | } | |
1644 | ||
1645 | pool->nglyphs = needed; | |
1646 | } | |
1647 | ||
153a073c | 1648 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1649 | to do sanity checks, and (b) the number of columns determines |
1650 | where rows in the frame matrix start---this must be available to | |
1651 | determine pointers to rows of window sub-matrices. */ | |
1652 | pool->nrows = matrix_dim.height; | |
1653 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1654 | |
5f5c8ee5 GM |
1655 | return changed_p; |
1656 | } | |
1657 | ||
1658 | ||
1659 | \f | |
1660 | /*********************************************************************** | |
1661 | Debug Code | |
1662 | ***********************************************************************/ | |
1663 | ||
1664 | #if GLYPH_DEBUG | |
1665 | ||
a13396c9 | 1666 | |
28d440ab KL |
1667 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1668 | XXX Maybe this should be changed to flush the current terminal instead of | |
1669 | stdout. | |
1670 | */ | |
a13396c9 GM |
1671 | |
1672 | void | |
1673 | flush_stdout () | |
1674 | { | |
1675 | fflush (stdout); | |
1676 | } | |
1677 | ||
1678 | ||
5f5c8ee5 GM |
1679 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1680 | pointer has been lost, e.g. by using a structure assignment between | |
1681 | rows, at least one pointer must occur more than once in the rows of | |
1682 | MATRIX. */ | |
1683 | ||
1684 | void | |
1685 | check_matrix_pointer_lossage (matrix) | |
1686 | struct glyph_matrix *matrix; | |
1687 | { | |
1688 | int i, j; | |
177c0ea7 | 1689 | |
5f5c8ee5 GM |
1690 | for (i = 0; i < matrix->nrows; ++i) |
1691 | for (j = 0; j < matrix->nrows; ++j) | |
1692 | xassert (i == j | |
1693 | || (matrix->rows[i].glyphs[TEXT_AREA] | |
1694 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1695 | } | |
1696 | ||
1697 | ||
1698 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1699 | ||
1700 | struct glyph_row * | |
1701 | matrix_row (matrix, row) | |
1702 | struct glyph_matrix *matrix; | |
1703 | int row; | |
1704 | { | |
1705 | xassert (matrix && matrix->rows); | |
1706 | xassert (row >= 0 && row < matrix->nrows); | |
1707 | ||
1708 | /* That's really too slow for normal testing because this function | |
1709 | is called almost everywhere. Although---it's still astonishingly | |
1710 | fast, so it is valuable to have for debugging purposes. */ | |
1711 | #if 0 | |
1712 | check_matrix_pointer_lossage (matrix); | |
1713 | #endif | |
177c0ea7 | 1714 | |
5f5c8ee5 GM |
1715 | return matrix->rows + row; |
1716 | } | |
1717 | ||
1718 | ||
1719 | #if 0 /* This function makes invalid assumptions when text is | |
1720 | partially invisible. But it might come handy for debugging | |
1721 | nevertheless. */ | |
1722 | ||
1723 | /* Check invariants that must hold for an up to date current matrix of | |
1724 | window W. */ | |
1725 | ||
1726 | static void | |
1727 | check_matrix_invariants (w) | |
1728 | struct window *w; | |
1729 | { | |
1730 | struct glyph_matrix *matrix = w->current_matrix; | |
1731 | int yb = window_text_bottom_y (w); | |
1732 | struct glyph_row *row = matrix->rows; | |
1733 | struct glyph_row *last_text_row = NULL; | |
1734 | struct buffer *saved = current_buffer; | |
1735 | struct buffer *buffer = XBUFFER (w->buffer); | |
1736 | int c; | |
177c0ea7 | 1737 | |
5f5c8ee5 GM |
1738 | /* This can sometimes happen for a fresh window. */ |
1739 | if (matrix->nrows < 2) | |
1740 | return; | |
1741 | ||
1742 | set_buffer_temp (buffer); | |
1743 | ||
1744 | /* Note: last row is always reserved for the mode line. */ | |
1745 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1746 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1747 | { | |
1748 | struct glyph_row *next = row + 1; | |
1749 | ||
1750 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1751 | last_text_row = row; | |
1752 | ||
1753 | /* Check that character and byte positions are in sync. */ | |
1754 | xassert (MATRIX_ROW_START_BYTEPOS (row) | |
1755 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); | |
1756 | ||
1757 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1758 | have such a position temporarily in case of a minibuffer | |
1759 | displaying something like `[Sole completion]' at its end. */ | |
1760 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
1761 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1762 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); | |
1763 | ||
1764 | /* Check that end position of `row' is equal to start position | |
1765 | of next row. */ | |
1766 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1767 | { | |
1768 | xassert (MATRIX_ROW_END_CHARPOS (row) | |
1769 | == MATRIX_ROW_START_CHARPOS (next)); | |
1770 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1771 | == MATRIX_ROW_START_BYTEPOS (next)); | |
1772 | } | |
1773 | row = next; | |
1774 | } | |
1775 | ||
1776 | xassert (w->current_matrix->nrows == w->desired_matrix->nrows); | |
1777 | xassert (w->desired_matrix->rows != NULL); | |
1778 | set_buffer_temp (saved); | |
1779 | } | |
1780 | ||
1781 | #endif /* 0 */ | |
1782 | ||
1783 | #endif /* GLYPH_DEBUG != 0 */ | |
1784 | ||
1785 | ||
1786 | \f | |
1787 | /********************************************************************** | |
1788 | Allocating/ Adjusting Glyph Matrices | |
1789 | **********************************************************************/ | |
1790 | ||
1791 | /* Allocate glyph matrices over a window tree for a frame-based | |
1792 | redisplay | |
1793 | ||
1794 | X and Y are column/row within the frame glyph matrix where | |
1795 | sub-matrices for the window tree rooted at WINDOW must be | |
8ce2650d YM |
1796 | allocated. DIM_ONLY_P non-zero means that the caller of this |
1797 | function is only interested in the result matrix dimension, and | |
1798 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1799 | |
1800 | The function returns the total width/height of the sub-matrices of | |
1801 | the window tree. If called on a frame root window, the computation | |
1802 | will take the mini-buffer window into account. | |
1803 | ||
1804 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1805 | ||
1806 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1807 | glyph matrices yet, and | |
1808 | ||
1809 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1810 | any window in the tree will be changed or have been changed (see | |
153a073c | 1811 | DIM_ONLY_P) |
5f5c8ee5 GM |
1812 | |
1813 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1814 | function. | |
1815 | ||
1816 | Windows are arranged into chains of windows on the same level | |
1817 | through the next fields of window structures. Such a level can be | |
1818 | either a sequence of horizontally adjacent windows from left to | |
1819 | right, or a sequence of vertically adjacent windows from top to | |
1820 | bottom. Each window in a horizontal sequence can be either a leaf | |
1821 | window or a vertical sequence; a window in a vertical sequence can | |
1822 | be either a leaf or a horizontal sequence. All windows in a | |
1823 | horizontal sequence have the same height, and all windows in a | |
1824 | vertical sequence have the same width. | |
1825 | ||
1826 | This function uses, for historical reasons, a more general | |
1827 | algorithm to determine glyph matrix dimensions that would be | |
1828 | necessary. | |
1829 | ||
1830 | The matrix height of a horizontal sequence is determined by the | |
1831 | maximum height of any matrix in the sequence. The matrix width of | |
1832 | a horizontal sequence is computed by adding up matrix widths of | |
1833 | windows in the sequence. | |
1834 | ||
1835 | |<------- result width ------->| | |
1836 | +---------+----------+---------+ --- | |
1837 | | | | | | | |
1838 | | | | | | |
1839 | +---------+ | | result height | |
1840 | | +---------+ | |
1841 | | | | | |
1842 | +----------+ --- | |
1843 | ||
1844 | The matrix width of a vertical sequence is the maximum matrix width | |
1845 | of any window in the sequence. Its height is computed by adding up | |
1846 | matrix heights of windows in the sequence. | |
1847 | ||
1848 | |<---- result width -->| | |
1849 | +---------+ --- | |
1850 | | | | | |
1851 | | | | | |
1852 | +---------+--+ | | |
1853 | | | | | |
1854 | | | result height | |
1855 | | | | |
1856 | +------------+---------+ | | |
1857 | | | | | |
1858 | | | | | |
1859 | +------------+---------+ --- */ | |
1860 | ||
1861 | /* Bit indicating that a new matrix will be allocated or has been | |
1862 | allocated. */ | |
1863 | ||
1864 | #define NEW_LEAF_MATRIX (1 << 0) | |
1865 | ||
1866 | /* Bit indicating that a matrix will or has changed its location or | |
1867 | size. */ | |
1868 | ||
1869 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1870 | ||
1871 | static struct dim | |
5d3cc43c GM |
1872 | allocate_matrices_for_frame_redisplay (window, x, y, dim_only_p, |
1873 | window_change_flags) | |
5f5c8ee5 GM |
1874 | Lisp_Object window; |
1875 | int x, y; | |
5f5c8ee5 GM |
1876 | int dim_only_p; |
1877 | int *window_change_flags; | |
1878 | { | |
1879 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1880 | int x0 = x, y0 = y; | |
1881 | int wmax = 0, hmax = 0; | |
1882 | struct dim total; | |
1883 | struct dim dim; | |
1884 | struct window *w; | |
1885 | int in_horz_combination_p; | |
1886 | ||
1887 | /* What combination is WINDOW part of? Compute this once since the | |
1888 | result is the same for all windows in the `next' chain. The | |
1889 | special case of a root window (parent equal to nil) is treated | |
1890 | like a vertical combination because a root window's `next' | |
1891 | points to the mini-buffer window, if any, which is arranged | |
1892 | vertically below other windows. */ | |
1893 | in_horz_combination_p | |
1894 | = (!NILP (XWINDOW (window)->parent) | |
1895 | && !NILP (XWINDOW (XWINDOW (window)->parent)->hchild)); | |
1896 | ||
1897 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1898 | do |
5f5c8ee5 GM |
1899 | { |
1900 | w = XWINDOW (window); | |
1901 | ||
1902 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1903 | on whether this is a combination or a leaf window. */ |
5f5c8ee5 | 1904 | if (!NILP (w->hchild)) |
177c0ea7 | 1905 | dim = allocate_matrices_for_frame_redisplay (w->hchild, x, y, |
5f5c8ee5 GM |
1906 | dim_only_p, |
1907 | window_change_flags); | |
1908 | else if (!NILP (w->vchild)) | |
177c0ea7 | 1909 | dim = allocate_matrices_for_frame_redisplay (w->vchild, x, y, |
5f5c8ee5 GM |
1910 | dim_only_p, |
1911 | window_change_flags); | |
1912 | else | |
1913 | { | |
1914 | /* If not already done, allocate sub-matrix structures. */ | |
1915 | if (w->desired_matrix == NULL) | |
1916 | { | |
1917 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1918 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1919 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1920 | } | |
177c0ea7 | 1921 | |
5f5c8ee5 GM |
1922 | /* Width and height MUST be chosen so that there are no |
1923 | holes in the frame matrix. */ | |
5d3cc43c GM |
1924 | dim.width = required_matrix_width (w); |
1925 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1926 | |
1927 | /* Will matrix be re-allocated? */ | |
1928 | if (x != w->desired_matrix->matrix_x | |
1929 | || y != w->desired_matrix->matrix_y | |
1930 | || dim.width != w->desired_matrix->matrix_w | |
1931 | || dim.height != w->desired_matrix->matrix_h | |
1932 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1933 | w->left_margin_cols) |
5f5c8ee5 GM |
1934 | != w->desired_matrix->left_margin_glyphs) |
1935 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1936 | w->right_margin_cols) |
5f5c8ee5 GM |
1937 | != w->desired_matrix->right_margin_glyphs)) |
1938 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1939 | ||
1940 | /* Actually change matrices, if allowed. Do not consider | |
1941 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1942 | may have been changed which we don't now here. We trust | |
1943 | that we only will be called with DIM_ONLY_P != 0 when | |
1944 | necessary. */ | |
1945 | if (!dim_only_p) | |
1946 | { | |
1947 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1948 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1949 | } | |
1950 | } | |
1951 | ||
1952 | /* If we are part of a horizontal combination, advance x for | |
1953 | windows to the right of W; otherwise advance y for windows | |
1954 | below W. */ | |
1955 | if (in_horz_combination_p) | |
1956 | x += dim.width; | |
177c0ea7 | 1957 | else |
5f5c8ee5 GM |
1958 | y += dim.height; |
1959 | ||
1960 | /* Remember maximum glyph matrix dimensions. */ | |
1961 | wmax = max (wmax, dim.width); | |
1962 | hmax = max (hmax, dim.height); | |
1963 | ||
1964 | /* Next window on same level. */ | |
1965 | window = w->next; | |
1966 | } | |
1967 | while (!NILP (window)); | |
1968 | ||
1969 | /* Set `total' to the total glyph matrix dimension of this window | |
1970 | level. In a vertical combination, the width is the width of the | |
1971 | widest window; the height is the y we finally reached, corrected | |
1972 | by the y we started with. In a horizontal combination, the total | |
1973 | height is the height of the tallest window, and the width is the | |
1974 | x we finally reached, corrected by the x we started with. */ | |
1975 | if (in_horz_combination_p) | |
1976 | { | |
1977 | total.width = x - x0; | |
1978 | total.height = hmax; | |
1979 | } | |
177c0ea7 | 1980 | else |
5f5c8ee5 GM |
1981 | { |
1982 | total.width = wmax; | |
1983 | total.height = y - y0; | |
1984 | } | |
1985 | ||
1986 | return total; | |
1987 | } | |
1988 | ||
1989 | ||
5d3cc43c GM |
1990 | /* Return the required height of glyph matrices for window W. */ |
1991 | ||
1992 | int | |
1993 | required_matrix_height (w) | |
1994 | struct window *w; | |
1995 | { | |
1996 | #ifdef HAVE_WINDOW_SYSTEM | |
1997 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 1998 | |
5d3cc43c GM |
1999 | if (FRAME_WINDOW_P (f)) |
2000 | { | |
2001 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1ea40aa2 | 2002 | int window_pixel_height = window_box_height (w) + eabs (w->vscroll); |
5d3cc43c | 2003 | return (((window_pixel_height + ch_height - 1) |
cc834cf9 | 2004 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
2005 | /* One partially visible line at the top and |
2006 | bottom of the window. */ | |
2007 | + 2 | |
153a073c | 2008 | /* 2 for header and mode line. */ |
5d3cc43c GM |
2009 | + 2); |
2010 | } | |
2011 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 2012 | |
7df02016 | 2013 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
2014 | } |
2015 | ||
2016 | ||
2017 | /* Return the required width of glyph matrices for window W. */ | |
2018 | ||
2019 | int | |
2020 | required_matrix_width (w) | |
2021 | struct window *w; | |
2022 | { | |
2023 | #ifdef HAVE_WINDOW_SYSTEM | |
2024 | struct frame *f = XFRAME (w->frame); | |
2025 | if (FRAME_WINDOW_P (f)) | |
2026 | { | |
2027 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 2028 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 2029 | |
5d3cc43c GM |
2030 | /* Compute number of glyphs needed in a glyph row. */ |
2031 | return (((window_pixel_width + ch_width - 1) | |
cc834cf9 | 2032 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
2033 | /* 2 partially visible columns in the text area. */ |
2034 | + 2 | |
2035 | /* One partially visible column at the right | |
2036 | edge of each marginal area. */ | |
2037 | + 1 + 1); | |
2038 | } | |
2039 | #endif /* HAVE_WINDOW_SYSTEM */ | |
2040 | ||
7df02016 | 2041 | return XINT (w->total_cols); |
5d3cc43c GM |
2042 | } |
2043 | ||
2044 | ||
5f5c8ee5 | 2045 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 2046 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 2047 | |
5f5c8ee5 | 2048 | static void |
5d3cc43c | 2049 | allocate_matrices_for_window_redisplay (w) |
5f5c8ee5 | 2050 | struct window *w; |
5f5c8ee5 | 2051 | { |
5f5c8ee5 GM |
2052 | while (w) |
2053 | { | |
2054 | if (!NILP (w->vchild)) | |
5d3cc43c | 2055 | allocate_matrices_for_window_redisplay (XWINDOW (w->vchild)); |
5f5c8ee5 | 2056 | else if (!NILP (w->hchild)) |
5d3cc43c | 2057 | allocate_matrices_for_window_redisplay (XWINDOW (w->hchild)); |
5f5c8ee5 GM |
2058 | else |
2059 | { | |
2060 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
2061 | struct dim dim; |
2062 | ||
2063 | /* If matrices are not yet allocated, allocate them now. */ | |
2064 | if (w->desired_matrix == NULL) | |
2065 | { | |
2066 | w->desired_matrix = new_glyph_matrix (NULL); | |
2067 | w->current_matrix = new_glyph_matrix (NULL); | |
2068 | } | |
2069 | ||
5d3cc43c GM |
2070 | dim.width = required_matrix_width (w); |
2071 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
2072 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
2073 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
2074 | } | |
177c0ea7 | 2075 | |
5f5c8ee5 GM |
2076 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
2077 | } | |
2078 | } | |
2079 | ||
2080 | ||
2081 | /* Re-allocate/ re-compute glyph matrices on frame F. If F is null, | |
2082 | do it for all frames; otherwise do it just for the given frame. | |
2083 | This function must be called when a new frame is created, its size | |
2084 | changes, or its window configuration changes. */ | |
2085 | ||
2086 | void | |
2087 | adjust_glyphs (f) | |
2088 | struct frame *f; | |
2089 | { | |
408f5064 GM |
2090 | /* Block input so that expose events and other events that access |
2091 | glyph matrices are not processed while we are changing them. */ | |
2092 | BLOCK_INPUT; | |
2093 | ||
5f5c8ee5 GM |
2094 | if (f) |
2095 | adjust_frame_glyphs (f); | |
2096 | else | |
2097 | { | |
2098 | Lisp_Object tail, lisp_frame; | |
177c0ea7 | 2099 | |
5f5c8ee5 GM |
2100 | FOR_EACH_FRAME (tail, lisp_frame) |
2101 | adjust_frame_glyphs (XFRAME (lisp_frame)); | |
2102 | } | |
408f5064 GM |
2103 | |
2104 | UNBLOCK_INPUT; | |
5f5c8ee5 GM |
2105 | } |
2106 | ||
2107 | ||
2108 | /* Adjust frame glyphs when Emacs is initialized. | |
177c0ea7 JB |
2109 | |
2110 | To be called from init_display. | |
2111 | ||
5f5c8ee5 GM |
2112 | We need a glyph matrix because redraw will happen soon. |
2113 | Unfortunately, window sizes on selected_frame are not yet set to | |
2114 | meaningful values. I believe we can assume that there are only two | |
2115 | windows on the frame---the mini-buffer and the root window. Frame | |
2116 | height and width seem to be correct so far. So, set the sizes of | |
2117 | windows to estimated values. */ | |
2118 | ||
2119 | static void | |
2120 | adjust_frame_glyphs_initially () | |
2121 | { | |
91fb7e1b GM |
2122 | struct frame *sf = SELECTED_FRAME (); |
2123 | struct window *root = XWINDOW (sf->root_window); | |
5f5c8ee5 | 2124 | struct window *mini = XWINDOW (root->next); |
7df02016 KS |
2125 | int frame_lines = FRAME_LINES (sf); |
2126 | int frame_cols = FRAME_COLS (sf); | |
91fb7e1b | 2127 | int top_margin = FRAME_TOP_MARGIN (sf); |
5f5c8ee5 GM |
2128 | |
2129 | /* Do it for the root window. */ | |
7df02016 KS |
2130 | XSETFASTINT (root->top_line, top_margin); |
2131 | XSETFASTINT (root->total_cols, frame_cols); | |
2132 | set_window_height (sf->root_window, frame_lines - 1 - top_margin, 0); | |
5f5c8ee5 GM |
2133 | |
2134 | /* Do it for the mini-buffer window. */ | |
7df02016 KS |
2135 | XSETFASTINT (mini->top_line, frame_lines - 1); |
2136 | XSETFASTINT (mini->total_cols, frame_cols); | |
5f5c8ee5 GM |
2137 | set_window_height (root->next, 1, 0); |
2138 | ||
91fb7e1b | 2139 | adjust_frame_glyphs (sf); |
5f5c8ee5 GM |
2140 | glyphs_initialized_initially_p = 1; |
2141 | } | |
177c0ea7 | 2142 | |
5f5c8ee5 GM |
2143 | |
2144 | /* Allocate/reallocate glyph matrices of a single frame F. */ | |
2145 | ||
2146 | static void | |
2147 | adjust_frame_glyphs (f) | |
2148 | struct frame *f; | |
2149 | { | |
2150 | if (FRAME_WINDOW_P (f)) | |
2151 | adjust_frame_glyphs_for_window_redisplay (f); | |
2152 | else | |
2153 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 2154 | |
5f5c8ee5 GM |
2155 | /* Don't forget the message buffer and the buffer for |
2156 | decode_mode_spec. */ | |
2157 | adjust_frame_message_buffer (f); | |
2158 | adjust_decode_mode_spec_buffer (f); | |
2159 | ||
2160 | f->glyphs_initialized_p = 1; | |
2161 | } | |
2162 | ||
075757cc CY |
2163 | /* Return 1 if any window in the tree has nonzero window margins. See |
2164 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ | |
2165 | static int | |
2166 | showing_window_margins_p (w) | |
2167 | struct window *w; | |
2168 | { | |
2169 | while (w) | |
2170 | { | |
2171 | if (!NILP (w->hchild)) | |
2172 | { | |
2173 | if (showing_window_margins_p (XWINDOW (w->hchild))) | |
2174 | return 1; | |
2175 | } | |
2176 | else if (!NILP (w->vchild)) | |
2177 | { | |
2178 | if (showing_window_margins_p (XWINDOW (w->vchild))) | |
2179 | return 1; | |
2180 | } | |
2181 | else if (!NILP (w->left_margin_cols) | |
2182 | || !NILP (w->right_margin_cols)) | |
2183 | return 1; | |
3fc809e2 | 2184 | |
075757cc CY |
2185 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2186 | } | |
2187 | return 0; | |
2188 | } | |
2189 | ||
5f5c8ee5 | 2190 | |
c9f00270 GM |
2191 | /* In the window tree with root W, build current matrices of leaf |
2192 | windows from the frame's current matrix. */ | |
2193 | ||
2194 | static void | |
2195 | fake_current_matrices (window) | |
2196 | Lisp_Object window; | |
2197 | { | |
2198 | struct window *w; | |
177c0ea7 | 2199 | |
c9f00270 GM |
2200 | for (; !NILP (window); window = w->next) |
2201 | { | |
2202 | w = XWINDOW (window); | |
177c0ea7 | 2203 | |
c9f00270 GM |
2204 | if (!NILP (w->hchild)) |
2205 | fake_current_matrices (w->hchild); | |
2206 | else if (!NILP (w->vchild)) | |
2207 | fake_current_matrices (w->vchild); | |
2208 | else | |
2209 | { | |
2210 | int i; | |
2211 | struct frame *f = XFRAME (w->frame); | |
2212 | struct glyph_matrix *m = w->current_matrix; | |
2213 | struct glyph_matrix *fm = f->current_matrix; | |
2214 | ||
7df02016 KS |
2215 | xassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
2216 | xassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 2217 | |
c9f00270 GM |
2218 | for (i = 0; i < m->matrix_h; ++i) |
2219 | { | |
2220 | struct glyph_row *r = m->rows + i; | |
7df02016 | 2221 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 GM |
2222 | |
2223 | xassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] | |
2224 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); | |
2225 | ||
2226 | r->enabled_p = fr->enabled_p; | |
2227 | if (r->enabled_p) | |
2228 | { | |
2229 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
2230 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
2231 | r->used[TEXT_AREA] = (m->matrix_w | |
2232 | - r->used[LEFT_MARGIN_AREA] | |
2233 | - r->used[RIGHT_MARGIN_AREA]); | |
2234 | r->mode_line_p = 0; | |
c9f00270 GM |
2235 | } |
2236 | } | |
2237 | } | |
2238 | } | |
2239 | } | |
2240 | ||
2241 | ||
bccee4f2 | 2242 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 2243 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 2244 | |
bccee4f2 GM |
2245 | static struct glyph_matrix * |
2246 | save_current_matrix (f) | |
31798cfe | 2247 | struct frame *f; |
c9f00270 | 2248 | { |
bccee4f2 GM |
2249 | int i; |
2250 | struct glyph_matrix *saved; | |
e797dea6 | 2251 | |
bccee4f2 GM |
2252 | saved = (struct glyph_matrix *) xmalloc (sizeof *saved); |
2253 | bzero (saved, sizeof *saved); | |
2254 | saved->nrows = f->current_matrix->nrows; | |
2255 | saved->rows = (struct glyph_row *) xmalloc (saved->nrows | |
2256 | * sizeof *saved->rows); | |
2257 | bzero (saved->rows, saved->nrows * sizeof *saved->rows); | |
2258 | ||
2259 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 2260 | { |
bccee4f2 GM |
2261 | struct glyph_row *from = f->current_matrix->rows + i; |
2262 | struct glyph_row *to = saved->rows + i; | |
2263 | size_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); | |
2264 | to->glyphs[TEXT_AREA] = (struct glyph *) xmalloc (nbytes); | |
2265 | bcopy (from->glyphs[TEXT_AREA], to->glyphs[TEXT_AREA], nbytes); | |
2266 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; | |
e797dea6 | 2267 | } |
bccee4f2 GM |
2268 | |
2269 | return saved; | |
2270 | } | |
2271 | ||
2272 | ||
2273 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
2274 | and free memory associated with SAVED. */ | |
2275 | ||
2276 | static void | |
2277 | restore_current_matrix (f, saved) | |
2278 | struct frame *f; | |
2279 | struct glyph_matrix *saved; | |
2280 | { | |
2281 | int i; | |
2282 | ||
2283 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 2284 | { |
bccee4f2 GM |
2285 | struct glyph_row *from = saved->rows + i; |
2286 | struct glyph_row *to = f->current_matrix->rows + i; | |
e797dea6 GM |
2287 | size_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
2288 | bcopy (from->glyphs[TEXT_AREA], to->glyphs[TEXT_AREA], nbytes); | |
2289 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; | |
bccee4f2 | 2290 | xfree (from->glyphs[TEXT_AREA]); |
e797dea6 | 2291 | } |
177c0ea7 | 2292 | |
bccee4f2 GM |
2293 | xfree (saved->rows); |
2294 | xfree (saved); | |
c9f00270 GM |
2295 | } |
2296 | ||
2297 | ||
bccee4f2 | 2298 | |
5f5c8ee5 GM |
2299 | /* Allocate/reallocate glyph matrices of a single frame F for |
2300 | frame-based redisplay. */ | |
2301 | ||
2302 | static void | |
2303 | adjust_frame_glyphs_for_frame_redisplay (f) | |
2304 | struct frame *f; | |
2305 | { | |
5f5c8ee5 GM |
2306 | struct dim matrix_dim; |
2307 | int pool_changed_p; | |
2308 | int window_change_flags; | |
2309 | int top_window_y; | |
2310 | ||
2311 | if (!FRAME_LIVE_P (f)) | |
2312 | return; | |
2313 | ||
5f5c8ee5 GM |
2314 | top_window_y = FRAME_TOP_MARGIN (f); |
2315 | ||
2316 | /* Allocate glyph pool structures if not already done. */ | |
2317 | if (f->desired_pool == NULL) | |
2318 | { | |
2319 | f->desired_pool = new_glyph_pool (); | |
2320 | f->current_pool = new_glyph_pool (); | |
2321 | } | |
2322 | ||
2323 | /* Allocate frames matrix structures if needed. */ | |
2324 | if (f->desired_matrix == NULL) | |
2325 | { | |
2326 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
2327 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
2328 | } | |
177c0ea7 | 2329 | |
5f5c8ee5 GM |
2330 | /* Compute window glyph matrices. (This takes the mini-buffer |
2331 | window into account). The result is the size of the frame glyph | |
2332 | matrix needed. The variable window_change_flags is set to a bit | |
2333 | mask indicating whether new matrices will be allocated or | |
2334 | existing matrices change their size or location within the frame | |
2335 | matrix. */ | |
2336 | window_change_flags = 0; | |
2337 | matrix_dim | |
2338 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
2339 | 0, top_window_y, | |
5d3cc43c | 2340 | 1, |
5f5c8ee5 GM |
2341 | &window_change_flags); |
2342 | ||
2343 | /* Add in menu bar lines, if any. */ | |
2344 | matrix_dim.height += top_window_y; | |
2345 | ||
2346 | /* Enlarge pools as necessary. */ | |
2347 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
2348 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
2349 | ||
177c0ea7 | 2350 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
2351 | absolutely necessary since it requires a frame redraw. */ |
2352 | if (pool_changed_p || window_change_flags) | |
2353 | { | |
2354 | /* Do it for window matrices. */ | |
2355 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 2356 | 0, top_window_y, 0, |
5f5c8ee5 GM |
2357 | &window_change_flags); |
2358 | ||
2359 | /* Size of frame matrices must equal size of frame. Note | |
2360 | that we are called for X frames with window widths NOT equal | |
2361 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
7df02016 KS |
2362 | xassert (matrix_dim.width == FRAME_COLS (f) |
2363 | && matrix_dim.height == FRAME_LINES (f)); | |
177c0ea7 | 2364 | |
e797dea6 GM |
2365 | /* Pointers to glyph memory in glyph rows are exchanged during |
2366 | the update phase of redisplay, which means in general that a | |
2367 | frame's current matrix consists of pointers into both the | |
2368 | desired and current glyph pool of the frame. Adjusting a | |
2369 | matrix sets the frame matrix up so that pointers are all into | |
2370 | the same pool. If we want to preserve glyph contents of the | |
2371 | current matrix over a call to adjust_glyph_matrix, we must | |
2372 | make a copy of the current glyphs, and restore the current | |
2373 | matrix' contents from that copy. */ | |
2374 | if (display_completed | |
2375 | && !FRAME_GARBAGED_P (f) | |
2376 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
2377 | && matrix_dim.height == f->current_matrix->matrix_h |
2378 | /* For some reason, the frame glyph matrix gets corrupted if | |
2379 | any of the windows contain margins. I haven't been able | |
2380 | to hunt down the reason, but for the moment this prevents | |
2381 | the problem from manifesting. -- cyd */ | |
2382 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) | |
e797dea6 | 2383 | { |
bccee4f2 GM |
2384 | struct glyph_matrix *copy = save_current_matrix (f); |
2385 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2386 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2387 | restore_current_matrix (f, copy); |
e797dea6 GM |
2388 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2389 | } | |
c9f00270 | 2390 | else |
e797dea6 | 2391 | { |
bccee4f2 | 2392 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2393 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2394 | SET_FRAME_GARBAGED (f); | |
2395 | } | |
5f5c8ee5 GM |
2396 | } |
2397 | } | |
2398 | ||
2399 | ||
2400 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2401 | window-based redisplay. */ | |
2402 | ||
2403 | static void | |
2404 | adjust_frame_glyphs_for_window_redisplay (f) | |
2405 | struct frame *f; | |
2406 | { | |
5f5c8ee5 GM |
2407 | struct window *w; |
2408 | ||
2409 | xassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); | |
177c0ea7 | 2410 | |
5f5c8ee5 | 2411 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2412 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2413 | |
8ce2650d | 2414 | #ifdef HAVE_X_WINDOWS |
5f5c8ee5 GM |
2415 | /* Allocate/ reallocate matrices of the dummy window used to display |
2416 | the menu bar under X when no X toolkit support is available. */ | |
488dd4c4 | 2417 | #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2418 | { |
2419 | /* Allocate a dummy window if not already done. */ | |
2420 | if (NILP (f->menu_bar_window)) | |
2421 | { | |
2422 | f->menu_bar_window = make_window (); | |
2423 | w = XWINDOW (f->menu_bar_window); | |
2424 | XSETFRAME (w->frame, f); | |
2425 | w->pseudo_window_p = 1; | |
2426 | } | |
2427 | else | |
2428 | w = XWINDOW (f->menu_bar_window); | |
2429 | ||
2430 | /* Set window dimensions to frame dimensions and allocate or | |
2431 | adjust glyph matrices of W. */ | |
7df02016 KS |
2432 | XSETFASTINT (w->top_line, 0); |
2433 | XSETFASTINT (w->left_col, 0); | |
2434 | XSETFASTINT (w->total_lines, FRAME_MENU_BAR_LINES (f)); | |
2435 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
5d3cc43c | 2436 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2437 | } |
57714a86 YM |
2438 | #endif /* not USE_X_TOOLKIT && not USE_GTK */ |
2439 | #endif /* HAVE_X_WINDOWS */ | |
5f5c8ee5 | 2440 | |
488dd4c4 | 2441 | #ifndef USE_GTK |
9ea173e8 GM |
2442 | /* Allocate/ reallocate matrices of the tool bar window. If we |
2443 | don't have a tool bar window yet, make one. */ | |
2444 | if (NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2445 | { |
9ea173e8 GM |
2446 | f->tool_bar_window = make_window (); |
2447 | w = XWINDOW (f->tool_bar_window); | |
5f5c8ee5 GM |
2448 | XSETFRAME (w->frame, f); |
2449 | w->pseudo_window_p = 1; | |
2450 | } | |
2451 | else | |
9ea173e8 | 2452 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2453 | |
7df02016 KS |
2454 | XSETFASTINT (w->top_line, FRAME_MENU_BAR_LINES (f)); |
2455 | XSETFASTINT (w->left_col, 0); | |
2456 | XSETFASTINT (w->total_lines, FRAME_TOOL_BAR_LINES (f)); | |
2457 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
5d3cc43c | 2458 | allocate_matrices_for_window_redisplay (w); |
488dd4c4 | 2459 | #endif |
5f5c8ee5 GM |
2460 | } |
2461 | ||
2462 | ||
177c0ea7 | 2463 | /* Adjust/ allocate message buffer of frame F. |
5f5c8ee5 | 2464 | |
5f5c8ee5 GM |
2465 | Note that the message buffer is never freed. Since I could not |
2466 | find a free in 19.34, I assume that freeing it would be | |
2467 | problematic in some way and don't do it either. | |
2468 | ||
2469 | (Implementation note: It should be checked if we can free it | |
2470 | eventually without causing trouble). */ | |
2471 | ||
2472 | static void | |
2473 | adjust_frame_message_buffer (f) | |
2474 | struct frame *f; | |
2475 | { | |
2476 | int size = FRAME_MESSAGE_BUF_SIZE (f) + 1; | |
2477 | ||
2478 | if (FRAME_MESSAGE_BUF (f)) | |
2479 | { | |
2480 | char *buffer = FRAME_MESSAGE_BUF (f); | |
2481 | char *new_buffer = (char *) xrealloc (buffer, size); | |
5f5c8ee5 GM |
2482 | FRAME_MESSAGE_BUF (f) = new_buffer; |
2483 | } | |
2484 | else | |
2485 | FRAME_MESSAGE_BUF (f) = (char *) xmalloc (size); | |
2486 | } | |
2487 | ||
2488 | ||
2489 | /* Re-allocate buffer for decode_mode_spec on frame F. */ | |
2490 | ||
2491 | static void | |
2492 | adjust_decode_mode_spec_buffer (f) | |
2493 | struct frame *f; | |
2494 | { | |
2495 | f->decode_mode_spec_buffer | |
2496 | = (char *) xrealloc (f->decode_mode_spec_buffer, | |
2497 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
2498 | } | |
2499 | ||
2500 | ||
2501 | \f | |
2502 | /********************************************************************** | |
2503 | Freeing Glyph Matrices | |
2504 | **********************************************************************/ | |
2505 | ||
2506 | /* Free glyph memory for a frame F. F may be null. This function can | |
2507 | be called for the same frame more than once. The root window of | |
2508 | F may be nil when this function is called. This is the case when | |
2509 | the function is called when F is destroyed. */ | |
2510 | ||
2511 | void | |
2512 | free_glyphs (f) | |
2513 | struct frame *f; | |
2514 | { | |
2515 | if (f && f->glyphs_initialized_p) | |
2516 | { | |
42f55fe0 GM |
2517 | /* Block interrupt input so that we don't get surprised by an X |
2518 | event while we're in an inconsistent state. */ | |
2519 | BLOCK_INPUT; | |
5f5c8ee5 | 2520 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2521 | |
5f5c8ee5 GM |
2522 | /* Release window sub-matrices. */ |
2523 | if (!NILP (f->root_window)) | |
2524 | free_window_matrices (XWINDOW (f->root_window)); | |
2525 | ||
2526 | /* Free the dummy window for menu bars without X toolkit and its | |
2527 | glyph matrices. */ | |
2528 | if (!NILP (f->menu_bar_window)) | |
2529 | { | |
2530 | struct window *w = XWINDOW (f->menu_bar_window); | |
2531 | free_glyph_matrix (w->desired_matrix); | |
2532 | free_glyph_matrix (w->current_matrix); | |
2533 | w->desired_matrix = w->current_matrix = NULL; | |
2534 | f->menu_bar_window = Qnil; | |
2535 | } | |
2536 | ||
9ea173e8 GM |
2537 | /* Free the tool bar window and its glyph matrices. */ |
2538 | if (!NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2539 | { |
9ea173e8 | 2540 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2541 | free_glyph_matrix (w->desired_matrix); |
2542 | free_glyph_matrix (w->current_matrix); | |
2543 | w->desired_matrix = w->current_matrix = NULL; | |
9ea173e8 | 2544 | f->tool_bar_window = Qnil; |
5f5c8ee5 GM |
2545 | } |
2546 | ||
2547 | /* Release frame glyph matrices. Reset fields to zero in | |
2548 | case we are called a second time. */ | |
2549 | if (f->desired_matrix) | |
2550 | { | |
2551 | free_glyph_matrix (f->desired_matrix); | |
2552 | free_glyph_matrix (f->current_matrix); | |
2553 | f->desired_matrix = f->current_matrix = NULL; | |
2554 | } | |
2555 | ||
2556 | /* Release glyph pools. */ | |
2557 | if (f->desired_pool) | |
2558 | { | |
2559 | free_glyph_pool (f->desired_pool); | |
2560 | free_glyph_pool (f->current_pool); | |
2561 | f->desired_pool = f->current_pool = NULL; | |
2562 | } | |
177c0ea7 | 2563 | |
42f55fe0 | 2564 | UNBLOCK_INPUT; |
5f5c8ee5 GM |
2565 | } |
2566 | } | |
2567 | ||
2568 | ||
2569 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2570 | function may be called with a null pointer, and it may be called on | |
2571 | the same tree more than once. */ | |
2572 | ||
2573 | void | |
2574 | free_window_matrices (w) | |
2575 | struct window *w; | |
2576 | { | |
2577 | while (w) | |
2578 | { | |
2579 | if (!NILP (w->hchild)) | |
2580 | free_window_matrices (XWINDOW (w->hchild)); | |
2581 | else if (!NILP (w->vchild)) | |
2582 | free_window_matrices (XWINDOW (w->vchild)); | |
177c0ea7 | 2583 | else |
5f5c8ee5 GM |
2584 | { |
2585 | /* This is a leaf window. Free its memory and reset fields | |
2586 | to zero in case this function is called a second time for | |
2587 | W. */ | |
2588 | free_glyph_matrix (w->current_matrix); | |
2589 | free_glyph_matrix (w->desired_matrix); | |
2590 | w->current_matrix = w->desired_matrix = NULL; | |
2591 | } | |
2592 | ||
2593 | /* Next window on same level. */ | |
2594 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2595 | } | |
2596 | } | |
2597 | ||
2598 | ||
2599 | /* Check glyph memory leaks. This function is called from | |
2600 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2601 | exits. We therefore free all glyph memory for all active frames | |
2602 | explicitly and check that nothing is left allocated. */ | |
2603 | ||
2604 | void | |
2605 | check_glyph_memory () | |
2606 | { | |
2607 | Lisp_Object tail, frame; | |
2608 | ||
2609 | /* Free glyph memory for all frames. */ | |
2610 | FOR_EACH_FRAME (tail, frame) | |
2611 | free_glyphs (XFRAME (frame)); | |
2612 | ||
2613 | /* Check that nothing is left allocated. */ | |
2614 | if (glyph_matrix_count) | |
2615 | abort (); | |
2616 | if (glyph_pool_count) | |
2617 | abort (); | |
2618 | } | |
2619 | ||
2620 | ||
2621 | \f | |
2622 | /********************************************************************** | |
2623 | Building a Frame Matrix | |
2624 | **********************************************************************/ | |
2625 | ||
2626 | /* Most of the redisplay code works on glyph matrices attached to | |
2627 | windows. This is a good solution most of the time, but it is not | |
2628 | suitable for terminal code. Terminal output functions cannot rely | |
2629 | on being able to set an arbitrary terminal window. Instead they | |
2630 | must be provided with a view of the whole frame, i.e. the whole | |
2631 | screen. We build such a view by constructing a frame matrix from | |
2632 | window matrices in this section. | |
2633 | ||
2634 | Windows that must be updated have their must_be_update_p flag set. | |
2635 | For all such windows, their desired matrix is made part of the | |
2636 | desired frame matrix. For other windows, their current matrix is | |
2637 | made part of the desired frame matrix. | |
2638 | ||
2639 | +-----------------+----------------+ | |
2640 | | desired | desired | | |
2641 | | | | | |
2642 | +-----------------+----------------+ | |
2643 | | current | | |
2644 | | | | |
2645 | +----------------------------------+ | |
2646 | ||
2647 | Desired window matrices can be made part of the frame matrix in a | |
2648 | cheap way: We exploit the fact that the desired frame matrix and | |
2649 | desired window matrices share their glyph memory. This is not | |
2650 | possible for current window matrices. Their glyphs are copied to | |
2651 | the desired frame matrix. The latter is equivalent to | |
2652 | preserve_other_columns in the old redisplay. | |
2653 | ||
2654 | Used glyphs counters for frame matrix rows are the result of adding | |
2655 | up glyph lengths of the window matrices. A line in the frame | |
2656 | matrix is enabled, if a corresponding line in a window matrix is | |
2657 | enabled. | |
177c0ea7 | 2658 | |
5f5c8ee5 GM |
2659 | After building the desired frame matrix, it will be passed to |
2660 | terminal code, which will manipulate both the desired and current | |
2661 | frame matrix. Changes applied to the frame's current matrix have | |
2662 | to be visible in current window matrices afterwards, of course. | |
2663 | ||
2664 | This problem is solved like this: | |
2665 | ||
2666 | 1. Window and frame matrices share glyphs. Window matrices are | |
2667 | constructed in a way that their glyph contents ARE the glyph | |
2668 | contents needed in a frame matrix. Thus, any modification of | |
2669 | glyphs done in terminal code will be reflected in window matrices | |
2670 | automatically. | |
177c0ea7 | 2671 | |
5f5c8ee5 GM |
2672 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2673 | intercepted by hook functions so that corresponding row operations | |
2674 | on window matrices can be performed. This is necessary because we | |
2675 | use pointers to glyphs in glyph row structures. To satisfy the | |
2676 | assumption of point 1 above that glyphs are updated implicitly in | |
2677 | window matrices when they are manipulated via the frame matrix, | |
2678 | window and frame matrix must of course agree where to find the | |
2679 | glyphs for their rows. Possible manipulations that must be | |
2680 | mirrored are assignments of rows of the desired frame matrix to the | |
2681 | current frame matrix and scrolling the current frame matrix. */ | |
2682 | ||
2683 | /* Build frame F's desired matrix from window matrices. Only windows | |
2684 | which have the flag must_be_updated_p set have to be updated. Menu | |
2685 | bar lines of a frame are not covered by window matrices, so make | |
2686 | sure not to touch them in this function. */ | |
2687 | ||
2688 | static void | |
2689 | build_frame_matrix (f) | |
2690 | struct frame *f; | |
2691 | { | |
2692 | int i; | |
2693 | ||
2694 | /* F must have a frame matrix when this function is called. */ | |
2695 | xassert (!FRAME_WINDOW_P (f)); | |
177c0ea7 | 2696 | |
5f5c8ee5 GM |
2697 | /* Clear all rows in the frame matrix covered by window matrices. |
2698 | Menu bar lines are not covered by windows. */ | |
2699 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2700 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2701 | ||
2702 | /* Build the matrix by walking the window tree. */ | |
2703 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2704 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2705 | } | |
2706 | ||
2707 | ||
2708 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2709 | matrices. W is the root of a window tree. */ | |
2710 | ||
2711 | static void | |
2712 | build_frame_matrix_from_window_tree (matrix, w) | |
2713 | struct glyph_matrix *matrix; | |
2714 | struct window *w; | |
2715 | { | |
2716 | while (w) | |
2717 | { | |
2718 | if (!NILP (w->hchild)) | |
2719 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->hchild)); | |
2720 | else if (!NILP (w->vchild)) | |
2721 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->vchild)); | |
2722 | else | |
2723 | build_frame_matrix_from_leaf_window (matrix, w); | |
2724 | ||
2725 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2726 | } | |
2727 | } | |
2728 | ||
2729 | ||
2730 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2731 | desired frame matrix built. W is a leaf window whose desired or | |
2732 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2733 | must_be_updated_p determines which matrix it contributes to | |
2734 | FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix | |
2735 | is added to FRAME_MATRIX, otherwise W's current matrix is added. | |
2736 | Adding a desired matrix means setting up used counters and such in | |
2737 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2738 | means copying glyphs. The latter case corresponds to | |
2739 | preserve_other_columns in the old redisplay. */ | |
2740 | ||
2741 | static void | |
2742 | build_frame_matrix_from_leaf_window (frame_matrix, w) | |
2743 | struct glyph_matrix *frame_matrix; | |
2744 | struct window *w; | |
2745 | { | |
2746 | struct glyph_matrix *window_matrix; | |
2747 | int window_y, frame_y; | |
2748 | /* If non-zero, a glyph to insert at the right border of W. */ | |
3fc809e2 KS |
2749 | GLYPH right_border_glyph; |
2750 | ||
2751 | SET_GLYPH_FROM_CHAR (right_border_glyph, 0); | |
5f5c8ee5 GM |
2752 | |
2753 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2754 | if (w->must_be_updated_p) | |
2755 | { | |
2756 | window_matrix = w->desired_matrix; | |
2757 | ||
2758 | /* Decide whether we want to add a vertical border glyph. */ | |
2759 | if (!WINDOW_RIGHTMOST_P (w)) | |
2760 | { | |
2761 | struct Lisp_Char_Table *dp = window_display_table (w); | |
3fc809e2 | 2762 | Lisp_Object gc; |
b4e49aee | 2763 | |
3fc809e2 KS |
2764 | SET_GLYPH_FROM_CHAR (right_border_glyph, '|'); |
2765 | if (dp | |
2766 | && (gc = DISP_BORDER_GLYPH (dp), GLYPH_CODE_P (gc)) | |
2767 | && GLYPH_CODE_CHAR_VALID_P (gc)) | |
2768 | { | |
2769 | SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph, gc); | |
2770 | spec_glyph_lookup_face (w, &right_border_glyph); | |
2771 | } | |
b4e49aee | 2772 | |
3fc809e2 KS |
2773 | if (GLYPH_FACE (right_border_glyph) <= 0) |
2774 | SET_GLYPH_FACE (right_border_glyph, VERTICAL_BORDER_FACE_ID); | |
5f5c8ee5 GM |
2775 | } |
2776 | } | |
2777 | else | |
2778 | window_matrix = w->current_matrix; | |
2779 | ||
2780 | /* For all rows in the window matrix and corresponding rows in the | |
2781 | frame matrix. */ | |
2782 | window_y = 0; | |
2783 | frame_y = window_matrix->matrix_y; | |
2784 | while (window_y < window_matrix->nrows) | |
2785 | { | |
2786 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2787 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
2a8bd25f | 2788 | int current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2789 | |
2790 | /* Fill up the frame row with spaces up to the left margin of the | |
2791 | window row. */ | |
2792 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2793 | ||
2794 | /* Fill up areas in the window matrix row with spaces. */ | |
2795 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2796 | |
2797 | /* If only part of W's desired matrix has been built, and | |
2798 | window_row wasn't displayed, use the corresponding current | |
2799 | row instead. */ | |
2800 | if (window_matrix == w->desired_matrix | |
2801 | && !window_row->enabled_p) | |
2802 | { | |
2803 | window_row = w->current_matrix->rows + window_y; | |
2804 | current_row_p = 1; | |
2805 | } | |
177c0ea7 | 2806 | |
2a8bd25f | 2807 | if (current_row_p) |
5f5c8ee5 | 2808 | { |
2a8bd25f | 2809 | /* Copy window row to frame row. */ |
5f5c8ee5 GM |
2810 | bcopy (window_row->glyphs[0], |
2811 | frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, | |
2812 | window_matrix->matrix_w * sizeof (struct glyph)); | |
2813 | } | |
2814 | else | |
2815 | { | |
2a8bd25f | 2816 | xassert (window_row->enabled_p); |
177c0ea7 | 2817 | |
2a8bd25f GM |
2818 | /* Only when a desired row has been displayed, we want |
2819 | the corresponding frame row to be updated. */ | |
2820 | frame_row->enabled_p = 1; | |
177c0ea7 | 2821 | |
5f5c8ee5 GM |
2822 | /* Maybe insert a vertical border between horizontally adjacent |
2823 | windows. */ | |
3fc809e2 | 2824 | if (GLYPH_CHAR (right_border_glyph) != 0) |
5f5c8ee5 GM |
2825 | { |
2826 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2827 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2828 | } | |
2829 | ||
498c08ea | 2830 | #if GLYPH_DEBUG |
a13396c9 GM |
2831 | /* Window row window_y must be a slice of frame row |
2832 | frame_y. */ | |
5f5c8ee5 | 2833 | xassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2834 | |
5f5c8ee5 GM |
2835 | /* If rows are in sync, we don't have to copy glyphs because |
2836 | frame and window share glyphs. */ | |
177c0ea7 | 2837 | |
a38634ff | 2838 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2839 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2840 | #endif |
5f5c8ee5 GM |
2841 | } |
2842 | ||
2843 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2844 | up with spaces, and visit leaf windows from left to right it | |
2845 | can be done simply. */ | |
177c0ea7 | 2846 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2847 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2848 | ||
5f5c8ee5 GM |
2849 | /* Next row. */ |
2850 | ++window_y; | |
2851 | ++frame_y; | |
2852 | } | |
2853 | } | |
2854 | ||
5f81871e RS |
2855 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2856 | ID, return a glyph that has a realized face ID. | |
2857 | This is used for glyphs displayed specially and not part of the text; | |
2858 | for instance, vertical separators, truncation markers, etc. */ | |
2859 | ||
3fc809e2 | 2860 | void |
5f81871e RS |
2861 | spec_glyph_lookup_face (w, glyph) |
2862 | struct window *w; | |
3fc809e2 | 2863 | GLYPH *glyph; |
5f81871e | 2864 | { |
3fc809e2 | 2865 | int lface_id = GLYPH_FACE (*glyph); |
5f81871e RS |
2866 | /* Convert the glyph's specified face to a realized (cache) face. */ |
2867 | if (lface_id > 0) | |
2868 | { | |
2869 | int face_id = merge_faces (XFRAME (w->frame), | |
2870 | Qt, lface_id, DEFAULT_FACE_ID); | |
3fc809e2 | 2871 | SET_GLYPH_FACE (*glyph, face_id); |
5f81871e | 2872 | } |
5f81871e | 2873 | } |
5f5c8ee5 GM |
2874 | |
2875 | /* Add spaces to a glyph row ROW in a window matrix. | |
2876 | ||
2877 | Each row has the form: | |
2878 | ||
2879 | +---------+-----------------------------+------------+ | |
2880 | | left | text | right | | |
2881 | +---------+-----------------------------+------------+ | |
2882 | ||
2883 | Left and right marginal areas are optional. This function adds | |
2884 | spaces to areas so that there are no empty holes between areas. | |
2885 | In other words: If the right area is not empty, the text area | |
2886 | is filled up with spaces up to the right area. If the text area | |
2887 | is not empty, the left area is filled up. | |
2888 | ||
2889 | To be called for frame-based redisplay, only. */ | |
2890 | ||
2891 | static void | |
2892 | fill_up_glyph_row_with_spaces (row) | |
2893 | struct glyph_row *row; | |
2894 | { | |
2895 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2896 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2897 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2898 | } | |
2899 | ||
2900 | ||
2901 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2902 | frame-based redisplay only. */ | |
2903 | ||
2904 | static void | |
2905 | fill_up_glyph_row_area_with_spaces (row, area) | |
2906 | struct glyph_row *row; | |
2907 | int area; | |
2908 | { | |
2909 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2910 | { | |
2911 | struct glyph *end = row->glyphs[area + 1]; | |
2912 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2913 | ||
2914 | while (text < end) | |
2915 | *text++ = space_glyph; | |
2916 | row->used[area] = text - row->glyphs[area]; | |
2917 | } | |
2918 | } | |
2919 | ||
2920 | ||
2921 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2922 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2923 | ||
2924 | static void | |
2925 | fill_up_frame_row_with_spaces (row, upto) | |
2926 | struct glyph_row *row; | |
2927 | int upto; | |
2928 | { | |
2929 | int i = row->used[TEXT_AREA]; | |
2930 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2931 | |
5f5c8ee5 GM |
2932 | while (i < upto) |
2933 | glyph[i++] = space_glyph; | |
2934 | ||
2935 | row->used[TEXT_AREA] = i; | |
2936 | } | |
2937 | ||
2938 | ||
2939 | \f | |
2940 | /********************************************************************** | |
2941 | Mirroring operations on frame matrices in window matrices | |
2942 | **********************************************************************/ | |
2943 | ||
2944 | /* Set frame being updated via frame-based redisplay to F. This | |
2945 | function must be called before updates to make explicit that we are | |
2946 | working on frame matrices or not. */ | |
2947 | ||
2948 | static INLINE void | |
2949 | set_frame_matrix_frame (f) | |
2950 | struct frame *f; | |
2951 | { | |
2952 | frame_matrix_frame = f; | |
2953 | } | |
2954 | ||
2955 | ||
2956 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2957 | DESIRED_MATRIX is the desired matrix corresponding to | |
2958 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2959 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2960 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2961 | done in frame matrices, and that we have to perform analogous | |
2962 | operations in window matrices of frame_matrix_frame. */ | |
2963 | ||
2964 | static INLINE void | |
2965 | make_current (desired_matrix, current_matrix, row) | |
2966 | struct glyph_matrix *desired_matrix, *current_matrix; | |
2967 | int row; | |
2968 | { | |
2969 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2970 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
e876ff42 | 2971 | int mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2972 | |
2973 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2974 | between both rows, and does a structure assignment otherwise. */ | |
2975 | assign_row (current_row, desired_row); | |
2976 | ||
2977 | /* Enable current_row to mark it as valid. */ | |
2978 | current_row->enabled_p = 1; | |
e876ff42 | 2979 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2980 | |
2981 | /* If we are called on frame matrices, perform analogous operations | |
2982 | for window matrices. */ | |
2983 | if (frame_matrix_frame) | |
2984 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); | |
2985 | } | |
2986 | ||
2987 | ||
2988 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2989 | W's frame which has been made current (by swapping pointers between | |
2990 | current and desired matrix). Perform analogous operations in the | |
2991 | matrices of leaf windows in the window tree rooted at W. */ | |
2992 | ||
2993 | static void | |
2994 | mirror_make_current (w, frame_row) | |
2995 | struct window *w; | |
2996 | int frame_row; | |
2997 | { | |
2998 | while (w) | |
2999 | { | |
3000 | if (!NILP (w->hchild)) | |
3001 | mirror_make_current (XWINDOW (w->hchild), frame_row); | |
3002 | else if (!NILP (w->vchild)) | |
3003 | mirror_make_current (XWINDOW (w->vchild), frame_row); | |
3004 | else | |
3005 | { | |
3006 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
3007 | here because the checks performed in debug mode there | |
3008 | will not allow the conversion. */ | |
3009 | int row = frame_row - w->desired_matrix->matrix_y; | |
3010 | ||
3011 | /* If FRAME_ROW is within W, assign the desired row to the | |
3012 | current row (exchanging glyph pointers). */ | |
3013 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
3014 | { | |
3015 | struct glyph_row *current_row | |
3016 | = MATRIX_ROW (w->current_matrix, row); | |
3017 | struct glyph_row *desired_row | |
3018 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
3019 | |
3020 | if (desired_row->enabled_p) | |
3021 | assign_row (current_row, desired_row); | |
3022 | else | |
3023 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 GM |
3024 | current_row->enabled_p = 1; |
3025 | } | |
3026 | } | |
177c0ea7 | 3027 | |
5f5c8ee5 GM |
3028 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3029 | } | |
3030 | } | |
3031 | ||
3032 | ||
3033 | /* Perform row dance after scrolling. We are working on the range of | |
3034 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
3035 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
3036 | row I in the range 0 <= I < NLINES, the index of the original line | |
3037 | to move to I. This index is relative to the row range, i.e. 0 <= | |
3038 | index < NLINES. RETAINED_P is a vector containing zero for each | |
3039 | row 0 <= I < NLINES which is empty. | |
3040 | ||
3041 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 3042 | |
5f5c8ee5 GM |
3043 | void |
3044 | mirrored_line_dance (matrix, unchanged_at_top, nlines, copy_from, | |
3045 | retained_p) | |
3046 | struct glyph_matrix *matrix; | |
3047 | int unchanged_at_top, nlines; | |
3048 | int *copy_from; | |
3049 | char *retained_p; | |
3050 | { | |
3051 | /* A copy of original rows. */ | |
3052 | struct glyph_row *old_rows; | |
3053 | ||
3054 | /* Rows to assign to. */ | |
3055 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 3056 | |
5f5c8ee5 GM |
3057 | int i; |
3058 | ||
3059 | /* Make a copy of the original rows. */ | |
3060 | old_rows = (struct glyph_row *) alloca (nlines * sizeof *old_rows); | |
3061 | bcopy (new_rows, old_rows, nlines * sizeof *old_rows); | |
3062 | ||
3063 | /* Assign new rows, maybe clear lines. */ | |
3064 | for (i = 0; i < nlines; ++i) | |
3065 | { | |
3066 | int enabled_before_p = new_rows[i].enabled_p; | |
3067 | ||
3068 | xassert (i + unchanged_at_top < matrix->nrows); | |
3069 | xassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
3070 | new_rows[i] = old_rows[copy_from[i]]; | |
3071 | new_rows[i].enabled_p = enabled_before_p; | |
3072 | ||
3073 | /* RETAINED_P is zero for empty lines. */ | |
3074 | if (!retained_p[copy_from[i]]) | |
3075 | new_rows[i].enabled_p = 0; | |
3076 | } | |
3077 | ||
153a073c | 3078 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 GM |
3079 | if (frame_matrix_frame) |
3080 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), | |
3081 | unchanged_at_top, nlines, copy_from, retained_p); | |
3082 | } | |
3083 | ||
3084 | ||
a13396c9 | 3085 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 3086 | the current frame matrix. */ |
a13396c9 GM |
3087 | |
3088 | static void | |
3089 | sync_window_with_frame_matrix_rows (w) | |
3090 | struct window *w; | |
3091 | { | |
3092 | struct frame *f = XFRAME (w->frame); | |
3093 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
075c507b | 3094 | int left, right, x, width; |
a13396c9 | 3095 | |
5cb88111 | 3096 | /* Preconditions: W must be a leaf window on a tty frame. */ |
a13396c9 | 3097 | xassert (NILP (w->hchild) && NILP (w->vchild)); |
a13396c9 GM |
3098 | xassert (!FRAME_WINDOW_P (f)); |
3099 | ||
7df02016 KS |
3100 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
3101 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
3102 | x = w->current_matrix->matrix_x; |
3103 | width = w->current_matrix->matrix_w; | |
3104 | ||
a13396c9 GM |
3105 | window_row = w->current_matrix->rows; |
3106 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 3107 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 3108 | |
5cb88111 | 3109 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 3110 | { |
5cb88111 GM |
3111 | window_row->glyphs[LEFT_MARGIN_AREA] |
3112 | = frame_row->glyphs[0] + x; | |
3113 | window_row->glyphs[TEXT_AREA] | |
3114 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
3115 | window_row->glyphs[LAST_AREA] | |
3116 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
3117 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
3118 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
3119 | } |
3120 | } | |
3121 | ||
3122 | ||
3123 | /* Return the window in the window tree rooted in W containing frame | |
3124 | row ROW. Value is null if none is found. */ | |
3125 | ||
3126 | struct window * | |
3127 | frame_row_to_window (w, row) | |
3128 | struct window *w; | |
3129 | int row; | |
3130 | { | |
3131 | struct window *found = NULL; | |
177c0ea7 | 3132 | |
a13396c9 GM |
3133 | while (w && !found) |
3134 | { | |
3135 | if (!NILP (w->hchild)) | |
3136 | found = frame_row_to_window (XWINDOW (w->hchild), row); | |
3137 | else if (!NILP (w->vchild)) | |
3138 | found = frame_row_to_window (XWINDOW (w->vchild), row); | |
7df02016 KS |
3139 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
3140 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 3141 | found = w; |
177c0ea7 | 3142 | |
a13396c9 GM |
3143 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3144 | } | |
3145 | ||
3146 | return found; | |
3147 | } | |
3148 | ||
3149 | ||
5f5c8ee5 GM |
3150 | /* Perform a line dance in the window tree rooted at W, after |
3151 | scrolling a frame matrix in mirrored_line_dance. | |
3152 | ||
3153 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
3154 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
3155 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
3156 | I < NLINES, the index of the original line to move to I. This | |
3157 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
3158 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
3159 | which is empty. */ | |
3160 | ||
3161 | static void | |
3162 | mirror_line_dance (w, unchanged_at_top, nlines, copy_from, retained_p) | |
3163 | struct window *w; | |
3164 | int unchanged_at_top, nlines; | |
3165 | int *copy_from; | |
3166 | char *retained_p; | |
3167 | { | |
3168 | while (w) | |
3169 | { | |
3170 | if (!NILP (w->hchild)) | |
3171 | mirror_line_dance (XWINDOW (w->hchild), unchanged_at_top, | |
3172 | nlines, copy_from, retained_p); | |
3173 | else if (!NILP (w->vchild)) | |
3174 | mirror_line_dance (XWINDOW (w->vchild), unchanged_at_top, | |
3175 | nlines, copy_from, retained_p); | |
3176 | else | |
3177 | { | |
3178 | /* W is a leaf window, and we are working on its current | |
3179 | matrix m. */ | |
3180 | struct glyph_matrix *m = w->current_matrix; | |
a13396c9 | 3181 | int i, sync_p = 0; |
5f5c8ee5 GM |
3182 | struct glyph_row *old_rows; |
3183 | ||
3184 | /* Make a copy of the original rows of matrix m. */ | |
3185 | old_rows = (struct glyph_row *) alloca (m->nrows * sizeof *old_rows); | |
3186 | bcopy (m->rows, old_rows, m->nrows * sizeof *old_rows); | |
3187 | ||
3188 | for (i = 0; i < nlines; ++i) | |
3189 | { | |
3190 | /* Frame relative line assigned to. */ | |
3191 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 3192 | |
5f5c8ee5 GM |
3193 | /* Frame relative line assigned. */ |
3194 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 3195 | |
5f5c8ee5 GM |
3196 | /* Window relative line assigned to. */ |
3197 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 3198 | |
5f5c8ee5 GM |
3199 | /* Window relative line assigned. */ |
3200 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 3201 | |
5f5c8ee5 GM |
3202 | /* Is assigned line inside window? */ |
3203 | int from_inside_window_p | |
3204 | = window_from >= 0 && window_from < m->matrix_h; | |
177c0ea7 | 3205 | |
a13396c9 GM |
3206 | /* Is assigned to line inside window? */ |
3207 | int to_inside_window_p | |
3208 | = window_to >= 0 && window_to < m->matrix_h; | |
177c0ea7 | 3209 | |
a13396c9 | 3210 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 3211 | { |
5f5c8ee5 GM |
3212 | /* Enabled setting before assignment. */ |
3213 | int enabled_before_p; | |
177c0ea7 | 3214 | |
5f5c8ee5 GM |
3215 | /* Do the assignment. The enabled_p flag is saved |
3216 | over the assignment because the old redisplay did | |
3217 | that. */ | |
3218 | enabled_before_p = m->rows[window_to].enabled_p; | |
3219 | m->rows[window_to] = old_rows[window_from]; | |
3220 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 3221 | |
5f5c8ee5 GM |
3222 | /* If frame line is empty, window line is empty, too. */ |
3223 | if (!retained_p[copy_from[i]]) | |
3224 | m->rows[window_to].enabled_p = 0; | |
3225 | } | |
a13396c9 GM |
3226 | else if (to_inside_window_p) |
3227 | { | |
3228 | /* A copy between windows. This is an infrequent | |
3229 | case not worth optimizing. */ | |
3230 | struct frame *f = XFRAME (w->frame); | |
3231 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); | |
3232 | struct window *w2; | |
3233 | struct glyph_matrix *m2; | |
3234 | int m2_from; | |
3235 | ||
fe8b8401 | 3236 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
3237 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
3238 | -nw', FROM_FRAME sometimes has no associated window. | |
3239 | This check avoids a segfault if W2 is null. */ | |
3240 | if (w2) | |
3241 | { | |
3242 | m2 = w2->current_matrix; | |
3243 | m2_from = frame_from - m2->matrix_y; | |
3244 | copy_row_except_pointers (m->rows + window_to, | |
3245 | m2->rows + m2_from); | |
3246 | ||
3247 | /* If frame line is empty, window line is empty, too. */ | |
3248 | if (!retained_p[copy_from[i]]) | |
3249 | m->rows[window_to].enabled_p = 0; | |
3250 | } | |
a13396c9 GM |
3251 | sync_p = 1; |
3252 | } | |
3253 | else if (from_inside_window_p) | |
3254 | sync_p = 1; | |
5f5c8ee5 | 3255 | } |
a13396c9 GM |
3256 | |
3257 | /* If there was a copy between windows, make sure glyph | |
3258 | pointers are in sync with the frame matrix. */ | |
3259 | if (sync_p) | |
3260 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 3261 | |
5f5c8ee5 GM |
3262 | /* Check that no pointers are lost. */ |
3263 | CHECK_MATRIX (m); | |
3264 | } | |
3265 | ||
3266 | /* Next window on same level. */ | |
3267 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3268 | } | |
3269 | } | |
3270 | ||
3271 | ||
3272 | #if GLYPH_DEBUG | |
3273 | ||
3274 | /* Check that window and frame matrices agree about their | |
3275 | understanding where glyphs of the rows are to find. For each | |
3276 | window in the window tree rooted at W, check that rows in the | |
3277 | matrices of leaf window agree with their frame matrices about | |
3278 | glyph pointers. */ | |
3279 | ||
3280 | void | |
3281 | check_window_matrix_pointers (w) | |
3282 | struct window *w; | |
3283 | { | |
3284 | while (w) | |
3285 | { | |
3286 | if (!NILP (w->hchild)) | |
3287 | check_window_matrix_pointers (XWINDOW (w->hchild)); | |
3288 | else if (!NILP (w->vchild)) | |
3289 | check_window_matrix_pointers (XWINDOW (w->vchild)); | |
3290 | else | |
60a8948a | 3291 | { |
5f5c8ee5 GM |
3292 | struct frame *f = XFRAME (w->frame); |
3293 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); | |
3294 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 3295 | } |
177c0ea7 | 3296 | |
5f5c8ee5 GM |
3297 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3298 | } | |
3299 | } | |
3300 | ||
3301 | ||
3302 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
3303 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
3304 | each row in WINDOW_MATRIX check that it's a slice of the | |
3305 | corresponding frame row. If it isn't, abort. */ | |
3306 | ||
3307 | static void | |
3308 | check_matrix_pointers (window_matrix, frame_matrix) | |
3309 | struct glyph_matrix *window_matrix, *frame_matrix; | |
3310 | { | |
3311 | /* Row number in WINDOW_MATRIX. */ | |
3312 | int i = 0; | |
3313 | ||
3314 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
3315 | int j = window_matrix->matrix_y; | |
3316 | ||
177c0ea7 | 3317 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
3318 | slice of the row in the frame matrix. If it isn't we didn't |
3319 | mirror an operation on the frame matrix correctly. */ | |
3320 | while (i < window_matrix->nrows) | |
3321 | { | |
3322 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
3323 | frame_matrix->rows + j)) | |
3324 | abort (); | |
3325 | ++i, ++j; | |
3326 | } | |
3327 | } | |
3328 | ||
3329 | #endif /* GLYPH_DEBUG != 0 */ | |
3330 | ||
3331 | ||
3332 | \f | |
3333 | /********************************************************************** | |
3334 | VPOS and HPOS translations | |
3335 | **********************************************************************/ | |
3336 | ||
3337 | #if GLYPH_DEBUG | |
3338 | ||
3339 | /* Translate vertical position VPOS which is relative to window W to a | |
3340 | vertical position relative to W's frame. */ | |
3341 | ||
3342 | static int | |
3343 | window_to_frame_vpos (w, vpos) | |
3344 | struct window *w; | |
3345 | int vpos; | |
3346 | { | |
3347 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 3348 | |
5f5c8ee5 GM |
3349 | xassert (!FRAME_WINDOW_P (f)); |
3350 | xassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); | |
7df02016 KS |
3351 | vpos += WINDOW_TOP_EDGE_LINE (w); |
3352 | xassert (vpos >= 0 && vpos <= FRAME_LINES (f)); | |
5f5c8ee5 GM |
3353 | return vpos; |
3354 | } | |
3355 | ||
3356 | ||
3357 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 3358 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
3359 | |
3360 | static int | |
3361 | window_to_frame_hpos (w, hpos) | |
3362 | struct window *w; | |
3363 | int hpos; | |
3364 | { | |
82f4a138 | 3365 | xassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 3366 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
3367 | return hpos; |
3368 | } | |
177c0ea7 | 3369 | |
5f5c8ee5 GM |
3370 | #endif /* GLYPH_DEBUG */ |
3371 | ||
3372 | ||
3373 | \f | |
3374 | /********************************************************************** | |
3375 | Redrawing Frames | |
3376 | **********************************************************************/ | |
3377 | ||
3378 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, | |
7ee72033 MB |
3379 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. */) |
3380 | (frame) | |
5f5c8ee5 GM |
3381 | Lisp_Object frame; |
3382 | { | |
3383 | struct frame *f; | |
3384 | ||
b7826503 | 3385 | CHECK_LIVE_FRAME (frame); |
5f5c8ee5 GM |
3386 | f = XFRAME (frame); |
3387 | ||
3388 | /* Ignore redraw requests, if frame has no glyphs yet. | |
3389 | (Implementation note: It still has to be checked why we are | |
3390 | called so early here). */ | |
3391 | if (!glyphs_initialized_initially_p) | |
3392 | return Qnil; | |
3393 | ||
3394 | update_begin (f); | |
3224dac1 | 3395 | #ifdef MSDOS |
f2adda5e | 3396 | if (FRAME_MSDOS_P (f)) |
6ed8eeff | 3397 | set_terminal_modes (FRAME_TERMINAL (f)); |
3224dac1 | 3398 | #endif |
385ed61f | 3399 | clear_frame (f); |
5f5c8ee5 GM |
3400 | clear_current_matrices (f); |
3401 | update_end (f); | |
daf01701 | 3402 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3403 | fflush (FRAME_TTY (f)->output); |
5f5c8ee5 GM |
3404 | windows_or_buffers_changed++; |
3405 | /* Mark all windows as inaccurate, so that every window will have | |
3406 | its redisplay done. */ | |
3407 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
3408 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
3409 | f->garbaged = 0; | |
3410 | return Qnil; | |
3411 | } | |
3412 | ||
3413 | ||
3414 | /* Redraw frame F. This is nothing more than a call to the Lisp | |
3415 | function redraw-frame. */ | |
3416 | ||
3417 | void | |
3418 | redraw_frame (f) | |
3419 | struct frame *f; | |
3420 | { | |
3421 | Lisp_Object frame; | |
3422 | XSETFRAME (frame, f); | |
3423 | Fredraw_frame (frame); | |
3424 | } | |
3425 | ||
3426 | ||
3427 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
7ee72033 MB |
3428 | doc: /* Clear and redisplay all visible frames. */) |
3429 | () | |
5f5c8ee5 GM |
3430 | { |
3431 | Lisp_Object tail, frame; | |
3432 | ||
3433 | FOR_EACH_FRAME (tail, frame) | |
3434 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
3435 | Fredraw_frame (frame); | |
3436 | ||
3437 | return Qnil; | |
3438 | } | |
3439 | ||
3440 | ||
3441 | /* This is used when frame_garbaged is set. Call Fredraw_frame on all | |
3442 | visible frames marked as garbaged. */ | |
3443 | ||
3444 | void | |
3445 | redraw_garbaged_frames () | |
3446 | { | |
3447 | Lisp_Object tail, frame; | |
3448 | ||
3449 | FOR_EACH_FRAME (tail, frame) | |
3450 | if (FRAME_VISIBLE_P (XFRAME (frame)) | |
3451 | && FRAME_GARBAGED_P (XFRAME (frame))) | |
3452 | Fredraw_frame (frame); | |
3453 | } | |
3454 | ||
3455 | ||
3456 | \f | |
3457 | /*********************************************************************** | |
3458 | Direct Operations | |
3459 | ***********************************************************************/ | |
3460 | ||
3461 | /* Try to update display and current glyph matrix directly. | |
3462 | ||
3463 | This function is called after a character G has been inserted into | |
3464 | current_buffer. It tries to update the current glyph matrix and | |
3465 | perform appropriate screen output to reflect the insertion. If it | |
3466 | succeeds, the global flag redisplay_performed_directly_p will be | |
3467 | set to 1, and thereby prevent the more costly general redisplay | |
3468 | from running (see redisplay_internal). | |
3469 | ||
3470 | This function is not called for `hairy' character insertions. | |
3471 | In particular, it is not called when after or before change | |
3472 | functions exist, like they are used by font-lock. See keyboard.c | |
3473 | for details where this function is called. */ | |
3474 | ||
3475 | int | |
3476 | direct_output_for_insert (g) | |
3477 | int g; | |
3478 | { | |
91fb7e1b | 3479 | register struct frame *f = SELECTED_FRAME (); |
5f5c8ee5 GM |
3480 | struct window *w = XWINDOW (selected_window); |
3481 | struct it it, it2; | |
3482 | struct glyph_row *glyph_row; | |
3483 | struct glyph *glyphs, *glyph, *end; | |
3484 | int n; | |
153a073c | 3485 | /* Non-null means that redisplay of W is based on window matrices. */ |
5f5c8ee5 GM |
3486 | int window_redisplay_p = FRAME_WINDOW_P (f); |
3487 | /* Non-null means we are in overwrite mode. */ | |
3488 | int overwrite_p = !NILP (current_buffer->overwrite_mode); | |
3489 | int added_width; | |
3490 | struct text_pos pos; | |
3491 | int delta, delta_bytes; | |
3492 | ||
3493 | /* Not done directly. */ | |
3494 | redisplay_performed_directly_p = 0; | |
3495 | ||
3496 | /* Quickly give up for some common cases. */ | |
3497 | if (cursor_in_echo_area | |
3498 | /* Give up if fonts have changed. */ | |
3499 | || fonts_changed_p | |
3500 | /* Give up if face attributes have been changed. */ | |
3501 | || face_change_count | |
3502 | /* Give up if cursor position not really known. */ | |
3503 | || !display_completed | |
3504 | /* Give up if buffer appears in two places. */ | |
3505 | || buffer_shared > 1 | |
c74e645b GM |
3506 | /* Give up if currently displaying a message instead of the |
3507 | minibuffer contents. */ | |
3508 | || (EQ (selected_window, minibuf_window) | |
3509 | && EQ (minibuf_window, echo_area_window)) | |
5f5c8ee5 GM |
3510 | /* Give up for hscrolled mini-buffer because display of the prompt |
3511 | is handled specially there (see display_line). */ | |
3512 | || (MINI_WINDOW_P (w) && XFASTINT (w->hscroll)) | |
3513 | /* Give up if overwriting in the middle of a line. */ | |
177c0ea7 JB |
3514 | || (overwrite_p |
3515 | && PT != ZV | |
5f5c8ee5 GM |
3516 | && FETCH_BYTE (PT) != '\n') |
3517 | /* Give up for tabs and line ends. */ | |
3518 | || g == '\t' | |
3519 | || g == '\n' | |
3520 | || g == '\r' | |
64d3f03b | 3521 | || (g == ' ' && !NILP (current_buffer->word_wrap)) |
5f5c8ee5 GM |
3522 | /* Give up if unable to display the cursor in the window. */ |
3523 | || w->cursor.vpos < 0 | |
c224f70b GM |
3524 | /* Give up if we are showing a message or just cleared the message |
3525 | because we might need to resize the echo area window. */ | |
3526 | || !NILP (echo_area_buffer[0]) | |
3527 | || !NILP (echo_area_buffer[1]) | |
408f5064 GM |
3528 | || (glyph_row = MATRIX_ROW (w->current_matrix, w->cursor.vpos), |
3529 | /* Can't do it in a continued line because continuation | |
3530 | lines would change. */ | |
3531 | (glyph_row->continued_p | |
6b61353c | 3532 | || glyph_row->exact_window_width_line_p |
408f5064 GM |
3533 | /* Can't use this method if the line overlaps others or is |
3534 | overlapped by others because these other lines would | |
3535 | have to be redisplayed. */ | |
3536 | || glyph_row->overlapping_p | |
3537 | || glyph_row->overlapped_p)) | |
5f5c8ee5 GM |
3538 | /* Can't do it for partial width windows on terminal frames |
3539 | because we can't clear to eol in such a window. */ | |
3540 | || (!window_redisplay_p && !WINDOW_FULL_WIDTH_P (w))) | |
3541 | return 0; | |
3542 | ||
f3ffc2c3 GM |
3543 | /* If we can't insert glyphs, we can use this method only |
3544 | at the end of a line. */ | |
daf01701 | 3545 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
f3ffc2c3 GM |
3546 | if (PT != ZV && FETCH_BYTE (PT_BYTE) != '\n') |
3547 | return 0; | |
3548 | ||
5f5c8ee5 GM |
3549 | /* Set up a display iterator structure for W. Glyphs will be |
3550 | produced in scratch_glyph_row. Current position is W's cursor | |
3551 | position. */ | |
3552 | clear_glyph_row (&scratch_glyph_row); | |
3553 | SET_TEXT_POS (pos, PT, PT_BYTE); | |
5f15d712 | 3554 | DEC_TEXT_POS (pos, !NILP (current_buffer->enable_multibyte_characters)); |
5f5c8ee5 GM |
3555 | init_iterator (&it, w, CHARPOS (pos), BYTEPOS (pos), &scratch_glyph_row, |
3556 | DEFAULT_FACE_ID); | |
3557 | ||
3558 | glyph_row = MATRIX_ROW (w->current_matrix, w->cursor.vpos); | |
e876ff42 GM |
3559 | if (glyph_row->mouse_face_p) |
3560 | return 0; | |
177c0ea7 | 3561 | |
5f5c8ee5 GM |
3562 | /* Give up if highlighting trailing whitespace and we have trailing |
3563 | whitespace in glyph_row. We would have to remove the trailing | |
3564 | whitespace face in that case. */ | |
f1f13490 | 3565 | if (!NILP (Vshow_trailing_whitespace) |
5f5c8ee5 GM |
3566 | && glyph_row->used[TEXT_AREA]) |
3567 | { | |
3568 | struct glyph *last; | |
3569 | ||
3570 | last = glyph_row->glyphs[TEXT_AREA] + glyph_row->used[TEXT_AREA] - 1; | |
3571 | if (last->type == STRETCH_GLYPH | |
3572 | || (last->type == CHAR_GLYPH | |
42186983 | 3573 | && last->u.ch == ' ')) |
5f5c8ee5 GM |
3574 | return 0; |
3575 | } | |
3576 | ||
3577 | /* Give up if there are overlay strings at pos. This would fail | |
3578 | if the overlay string has newlines in it. */ | |
3579 | if (STRINGP (it.string)) | |
3580 | return 0; | |
177c0ea7 | 3581 | |
5f5c8ee5 GM |
3582 | it.hpos = w->cursor.hpos; |
3583 | it.vpos = w->cursor.vpos; | |
3584 | it.current_x = w->cursor.x + it.first_visible_x; | |
3585 | it.current_y = w->cursor.y; | |
3586 | it.end_charpos = PT; | |
3587 | it.stop_charpos = min (PT, it.stop_charpos); | |
ae76d741 | 3588 | it.stop_charpos = max (IT_CHARPOS (it), it.stop_charpos); |
5f5c8ee5 GM |
3589 | |
3590 | /* More than one display element may be returned for PT - 1 if | |
3591 | (i) it's a control character which is translated into `\003' or | |
177c0ea7 | 3592 | `^C', or (ii) it has a display table entry, or (iii) it's a |
5f5c8ee5 GM |
3593 | combination of both. */ |
3594 | delta = delta_bytes = 0; | |
3595 | while (get_next_display_element (&it)) | |
3596 | { | |
3597 | PRODUCE_GLYPHS (&it); | |
3598 | ||
3599 | /* Give up if glyph doesn't fit completely on the line. */ | |
3600 | if (it.current_x >= it.last_visible_x) | |
3601 | return 0; | |
3602 | ||
3603 | /* Give up if new glyph has different ascent or descent than | |
3604 | the original row, or if it is not a character glyph. */ | |
3605 | if (glyph_row->ascent != it.ascent | |
3606 | || glyph_row->height != it.ascent + it.descent | |
408f5064 GM |
3607 | || glyph_row->phys_ascent != it.phys_ascent |
3608 | || glyph_row->phys_height != it.phys_ascent + it.phys_descent | |
5f5c8ee5 GM |
3609 | || it.what != IT_CHARACTER) |
3610 | return 0; | |
3611 | ||
3612 | delta += 1; | |
3613 | delta_bytes += it.len; | |
a2e2a7f6 | 3614 | set_iterator_to_next (&it, 1); |
5f5c8ee5 GM |
3615 | } |
3616 | ||
3617 | /* Give up if we hit the right edge of the window. We would have | |
3618 | to insert truncation or continuation glyphs. */ | |
3619 | added_width = it.current_x - (w->cursor.x + it.first_visible_x); | |
3620 | if (glyph_row->pixel_width + added_width >= it.last_visible_x) | |
3621 | return 0; | |
3622 | ||
3623 | /* Give up if there is a \t following in the line. */ | |
3624 | it2 = it; | |
3625 | it2.end_charpos = ZV; | |
3626 | it2.stop_charpos = min (it2.stop_charpos, ZV); | |
3627 | while (get_next_display_element (&it2) | |
3628 | && !ITERATOR_AT_END_OF_LINE_P (&it2)) | |
3629 | { | |
3630 | if (it2.c == '\t') | |
3631 | return 0; | |
a2e2a7f6 | 3632 | set_iterator_to_next (&it2, 1); |
5f5c8ee5 GM |
3633 | } |
3634 | ||
3635 | /* Number of new glyphs produced. */ | |
3636 | n = it.glyph_row->used[TEXT_AREA]; | |
3637 | ||
3638 | /* Start and end of glyphs in original row. */ | |
3639 | glyphs = glyph_row->glyphs[TEXT_AREA] + w->cursor.hpos; | |
3640 | end = glyph_row->glyphs[1 + TEXT_AREA]; | |
60a8948a | 3641 | |
5f5c8ee5 GM |
3642 | /* Make room for new glyphs, then insert them. */ |
3643 | xassert (end - glyphs - n >= 0); | |
700fb05a GM |
3644 | safe_bcopy ((char *) glyphs, (char *) (glyphs + n), |
3645 | (end - glyphs - n) * sizeof (*end)); | |
5f5c8ee5 GM |
3646 | bcopy (it.glyph_row->glyphs[TEXT_AREA], glyphs, n * sizeof *glyphs); |
3647 | glyph_row->used[TEXT_AREA] = min (glyph_row->used[TEXT_AREA] + n, | |
3648 | end - glyph_row->glyphs[TEXT_AREA]); | |
177c0ea7 | 3649 | |
5f5c8ee5 GM |
3650 | /* Compute new line width. */ |
3651 | glyph = glyph_row->glyphs[TEXT_AREA]; | |
3652 | end = glyph + glyph_row->used[TEXT_AREA]; | |
3653 | glyph_row->pixel_width = glyph_row->x; | |
3654 | while (glyph < end) | |
3655 | { | |
3656 | glyph_row->pixel_width += glyph->pixel_width; | |
3657 | ++glyph; | |
3658 | } | |
3659 | ||
177c0ea7 | 3660 | /* Increment buffer positions for glyphs following the newly |
5f5c8ee5 GM |
3661 | inserted ones. */ |
3662 | for (glyph = glyphs + n; glyph < end; ++glyph) | |
f2fa858f | 3663 | if (glyph->charpos > 0 && BUFFERP (glyph->object)) |
5f5c8ee5 | 3664 | glyph->charpos += delta; |
177c0ea7 | 3665 | |
5f5c8ee5 GM |
3666 | if (MATRIX_ROW_END_CHARPOS (glyph_row) > 0) |
3667 | { | |
3668 | MATRIX_ROW_END_CHARPOS (glyph_row) += delta; | |
3669 | MATRIX_ROW_END_BYTEPOS (glyph_row) += delta_bytes; | |
3670 | } | |
177c0ea7 | 3671 | |
5f5c8ee5 | 3672 | /* Adjust positions in lines following the one we are in. */ |
86c11ba1 GM |
3673 | increment_matrix_positions (w->current_matrix, |
3674 | w->cursor.vpos + 1, | |
3675 | w->current_matrix->nrows, | |
3676 | delta, delta_bytes); | |
5f5c8ee5 GM |
3677 | |
3678 | glyph_row->contains_overlapping_glyphs_p | |
3679 | |= it.glyph_row->contains_overlapping_glyphs_p; | |
3680 | ||
975c6226 GM |
3681 | glyph_row->displays_text_p = 1; |
3682 | w->window_end_vpos = make_number (max (w->cursor.vpos, | |
3683 | XFASTINT (w->window_end_vpos))); | |
3684 | ||
f1f13490 | 3685 | if (!NILP (Vshow_trailing_whitespace)) |
5f5c8ee5 GM |
3686 | highlight_trailing_whitespace (it.f, glyph_row); |
3687 | ||
3688 | /* Write glyphs. If at end of row, we can simply call write_glyphs. | |
3689 | In the middle, we have to insert glyphs. Note that this is now | |
3690 | implemented for X frames. The implementation uses updated_window | |
3691 | and updated_row. */ | |
3692 | updated_row = glyph_row; | |
9d126815 | 3693 | updated_area = TEXT_AREA; |
5f5c8ee5 | 3694 | update_begin (f); |
fa971ac3 | 3695 | if (FRAME_RIF (f)) |
5f5c8ee5 | 3696 | { |
fa971ac3 | 3697 | FRAME_RIF (f)->update_window_begin_hook (w); |
177c0ea7 | 3698 | |
7728f17b GM |
3699 | if (glyphs == end - n |
3700 | /* In front of a space added by append_space. */ | |
3701 | || (glyphs == end - n - 1 | |
3702 | && (end - n)->charpos <= 0)) | |
fa971ac3 | 3703 | FRAME_RIF (f)->write_glyphs (glyphs, n); |
5f5c8ee5 | 3704 | else |
fa971ac3 | 3705 | FRAME_RIF (f)->insert_glyphs (glyphs, n); |
5f5c8ee5 GM |
3706 | } |
3707 | else | |
3708 | { | |
3709 | if (glyphs == end - n) | |
385ed61f | 3710 | write_glyphs (f, glyphs, n); |
5f5c8ee5 | 3711 | else |
385ed61f | 3712 | insert_glyphs (f, glyphs, n); |
5f5c8ee5 | 3713 | } |
4588ec20 | 3714 | |
5f5c8ee5 GM |
3715 | w->cursor.hpos += n; |
3716 | w->cursor.x = it.current_x - it.first_visible_x; | |
3717 | xassert (w->cursor.hpos >= 0 | |
3718 | && w->cursor.hpos < w->desired_matrix->matrix_w); | |
3719 | ||
3720 | /* How to set the cursor differs depending on whether we are | |
3721 | using a frame matrix or a window matrix. Note that when | |
3722 | a frame matrix is used, cursor_to expects frame coordinates, | |
3723 | and the X and Y parameters are not used. */ | |
3724 | if (window_redisplay_p) | |
fa971ac3 KL |
3725 | FRAME_RIF (f)->cursor_to (w->cursor.vpos, w->cursor.hpos, |
3726 | w->cursor.y, w->cursor.x); | |
5f5c8ee5 GM |
3727 | else |
3728 | { | |
3729 | int x, y; | |
3730 | x = (WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos) | |
7df02016 KS |
3731 | + (INTEGERP (w->left_margin_cols) |
3732 | ? XFASTINT (w->left_margin_cols) | |
5f5c8ee5 GM |
3733 | : 0)); |
3734 | y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
385ed61f | 3735 | cursor_to (f, y, x); |
5f5c8ee5 | 3736 | } |
4588ec20 | 3737 | |
6b61353c KH |
3738 | #ifdef HAVE_WINDOW_SYSTEM |
3739 | update_window_fringes (w, 0); | |
3740 | #endif | |
3741 | ||
fa971ac3 KL |
3742 | if (FRAME_RIF (f)) |
3743 | FRAME_RIF (f)->update_window_end_hook (w, 1, 0); | |
5f5c8ee5 GM |
3744 | update_end (f); |
3745 | updated_row = NULL; | |
daf01701 | 3746 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3747 | fflush (FRAME_TTY (f)->output); |
4588ec20 | 3748 | |
5f5c8ee5 | 3749 | TRACE ((stderr, "direct output for insert\n")); |
fc5206ff | 3750 | mark_window_display_accurate (it.window, 1); |
5f5c8ee5 GM |
3751 | redisplay_performed_directly_p = 1; |
3752 | return 1; | |
3753 | } | |
448fd7c0 | 3754 | |
4588ec20 | 3755 | |
5f5c8ee5 GM |
3756 | /* Perform a direct display update for moving PT by N positions |
3757 | left or right. N < 0 means a movement backwards. This function | |
3758 | is currently only called for N == 1 or N == -1. */ | |
3759 | ||
3760 | int | |
3761 | direct_output_forward_char (n) | |
3762 | int n; | |
3763 | { | |
91fb7e1b | 3764 | struct frame *f = SELECTED_FRAME (); |
5f5c8ee5 GM |
3765 | struct window *w = XWINDOW (selected_window); |
3766 | struct glyph_row *row; | |
3767 | ||
959804a0 | 3768 | /* Give up if point moved out of or into a composition. */ |
7c752c80 | 3769 | if (check_point_in_composition (current_buffer, XINT (w->last_point), |
959804a0 KH |
3770 | current_buffer, PT)) |
3771 | return 0; | |
3772 | ||
5f5c8ee5 GM |
3773 | /* Give up if face attributes have been changed. */ |
3774 | if (face_change_count) | |
3775 | return 0; | |
177c0ea7 JB |
3776 | |
3777 | /* Give up if current matrix is not up to date or we are | |
5f5c8ee5 GM |
3778 | displaying a message. */ |
3779 | if (!display_completed || cursor_in_echo_area) | |
3780 | return 0; | |
3781 | ||
3782 | /* Give up if the buffer's direction is reversed. */ | |
3783 | if (!NILP (XBUFFER (w->buffer)->direction_reversed)) | |
3784 | return 0; | |
3785 | ||
3786 | /* Can't use direct output if highlighting a region. */ | |
3787 | if (!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active)) | |
3788 | return 0; | |
3789 | ||
f1f13490 GM |
3790 | /* Can't use direct output if highlighting trailing whitespace. */ |
3791 | if (!NILP (Vshow_trailing_whitespace)) | |
3792 | return 0; | |
3793 | ||
d2d2ddaf GM |
3794 | /* Give up if we are showing a message or just cleared the message |
3795 | because we might need to resize the echo area window. */ | |
3796 | if (!NILP (echo_area_buffer[0]) || !NILP (echo_area_buffer[1])) | |
3797 | return 0; | |
3798 | ||
e4e0bee9 GM |
3799 | /* Give up if currently displaying a message instead of the |
3800 | minibuffer contents. */ | |
3801 | if (XWINDOW (minibuf_window) == w | |
3802 | && EQ (minibuf_window, echo_area_window)) | |
3803 | return 0; | |
177c0ea7 | 3804 | |
d2d2ddaf GM |
3805 | /* Give up if we don't know where the cursor is. */ |
3806 | if (w->cursor.vpos < 0) | |
3807 | return 0; | |
3808 | ||
5f5c8ee5 GM |
3809 | row = MATRIX_ROW (w->current_matrix, w->cursor.vpos); |
3810 | ||
2a8bd25f | 3811 | /* Give up if PT is outside of the last known cursor row. */ |
9b784ab8 GM |
3812 | if (PT <= MATRIX_ROW_START_CHARPOS (row) |
3813 | || PT >= MATRIX_ROW_END_CHARPOS (row)) | |
5f5c8ee5 GM |
3814 | return 0; |
3815 | ||
3816 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
177c0ea7 | 3817 | |
5f5c8ee5 GM |
3818 | w->last_cursor = w->cursor; |
3819 | XSETFASTINT (w->last_point, PT); | |
3820 | ||
3821 | xassert (w->cursor.hpos >= 0 | |
3822 | && w->cursor.hpos < w->desired_matrix->matrix_w); | |
177c0ea7 | 3823 | |
5f5c8ee5 | 3824 | if (FRAME_WINDOW_P (f)) |
fa971ac3 KL |
3825 | FRAME_RIF (f)->cursor_to (w->cursor.vpos, w->cursor.hpos, |
3826 | w->cursor.y, w->cursor.x); | |
5f5c8ee5 GM |
3827 | else |
3828 | { | |
3829 | int x, y; | |
3830 | x = (WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos) | |
7df02016 KS |
3831 | + (INTEGERP (w->left_margin_cols) |
3832 | ? XFASTINT (w->left_margin_cols) | |
5f5c8ee5 GM |
3833 | : 0)); |
3834 | y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
385ed61f | 3835 | cursor_to (f, y, x); |
4588ec20 | 3836 | } |
177c0ea7 | 3837 | |
daf01701 | 3838 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3839 | fflush (FRAME_TTY (f)->output); |
5f5c8ee5 | 3840 | redisplay_performed_directly_p = 1; |
4588ec20 JB |
3841 | return 1; |
3842 | } | |
5f5c8ee5 GM |
3843 | |
3844 | ||
4588ec20 | 3845 | \f |
5f5c8ee5 GM |
3846 | /*********************************************************************** |
3847 | Frame Update | |
3848 | ***********************************************************************/ | |
4588ec20 | 3849 | |
5f5c8ee5 | 3850 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 3851 | |
5f5c8ee5 GM |
3852 | If FORCE_P is non-zero, don't let redisplay be stopped by detecting |
3853 | pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try | |
3854 | scrolling. | |
177c0ea7 | 3855 | |
5f5c8ee5 | 3856 | Value is non-zero if redisplay was stopped due to pending input. */ |
4588ec20 | 3857 | |
5f5c8ee5 GM |
3858 | int |
3859 | update_frame (f, force_p, inhibit_hairy_id_p) | |
3860 | struct frame *f; | |
3861 | int force_p; | |
3862 | int inhibit_hairy_id_p; | |
3863 | { | |
3864 | /* 1 means display has been paused because of pending input. */ | |
3865 | int paused_p; | |
3866 | struct window *root_window = XWINDOW (f->root_window); | |
3867 | ||
a2130dbb KS |
3868 | if (redisplay_dont_pause) |
3869 | force_p = 1; | |
d012c62b | 3870 | #if PERIODIC_PREEMPTION_CHECKING |
a2130dbb KS |
3871 | else if (NILP (Vredisplay_preemption_period)) |
3872 | force_p = 1; | |
3873 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
3874 | { |
3875 | EMACS_TIME tm; | |
3876 | double p = XFLOATINT (Vredisplay_preemption_period); | |
3877 | int sec, usec; | |
3878 | ||
993d4ab6 KS |
3879 | if (detect_input_pending_ignore_squeezables ()) |
3880 | { | |
3881 | paused_p = 1; | |
3882 | goto do_pause; | |
3883 | } | |
3884 | ||
d012c62b KS |
3885 | sec = (int) p; |
3886 | usec = (p - sec) * 1000000; | |
3887 | ||
3888 | EMACS_GET_TIME (tm); | |
3889 | EMACS_SET_SECS_USECS (preemption_period, sec, usec); | |
3890 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
3891 | } | |
3892 | #endif | |
3893 | ||
5f5c8ee5 | 3894 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3895 | { |
5f5c8ee5 GM |
3896 | /* We are working on window matrix basis. All windows whose |
3897 | flag must_be_updated_p is set have to be updated. */ | |
3898 | ||
3899 | /* Record that we are not working on frame matrices. */ | |
3900 | set_frame_matrix_frame (NULL); | |
3901 | ||
3902 | /* Update all windows in the window tree of F, maybe stopping | |
3903 | when pending input is detected. */ | |
3904 | update_begin (f); | |
3905 | ||
3906 | /* Update the menu bar on X frames that don't have toolkit | |
3907 | support. */ | |
3908 | if (WINDOWP (f->menu_bar_window)) | |
3909 | update_window (XWINDOW (f->menu_bar_window), 1); | |
3910 | ||
3911 | /* Update the tool-bar window, if present. */ | |
9ea173e8 | 3912 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3913 | { |
9ea173e8 | 3914 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3915 | |
3916 | /* Update tool-bar window. */ | |
3917 | if (w->must_be_updated_p) | |
4588ec20 | 3918 | { |
153a073c PJ |
3919 | Lisp_Object tem; |
3920 | ||
5f5c8ee5 GM |
3921 | update_window (w, 1); |
3922 | w->must_be_updated_p = 0; | |
3923 | ||
3924 | /* Swap tool-bar strings. We swap because we want to | |
3925 | reuse strings. */ | |
9ea173e8 GM |
3926 | tem = f->current_tool_bar_string; |
3927 | f->current_tool_bar_string = f->desired_tool_bar_string; | |
3928 | f->desired_tool_bar_string = tem; | |
4588ec20 JB |
3929 | } |
3930 | } | |
177c0ea7 | 3931 | |
5f5c8ee5 GM |
3932 | |
3933 | /* Update windows. */ | |
3934 | paused_p = update_window_tree (root_window, force_p); | |
3935 | update_end (f); | |
177c0ea7 | 3936 | |
6b61353c | 3937 | /* This flush is a performance bottleneck under X, |
e581a466 | 3938 | and it doesn't seem to be necessary anyway (in general). |
6b61353c | 3939 | It is necessary when resizing the window with the mouse, or |
e581a466 | 3940 | at least the fringes are not redrawn in a timely manner. ++kfs */ |
6b61353c | 3941 | if (f->force_flush_display_p) |
e581a466 KL |
3942 | { |
3943 | FRAME_RIF (f)->flush_display (f); | |
3944 | f->force_flush_display_p = 0; | |
3945 | } | |
4588ec20 | 3946 | } |
5f5c8ee5 GM |
3947 | else |
3948 | { | |
3949 | /* We are working on frame matrix basis. Set the frame on whose | |
3950 | frame matrix we operate. */ | |
3951 | set_frame_matrix_frame (f); | |
3952 | ||
868dd24b | 3953 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3954 | build_frame_matrix (f); |
177c0ea7 | 3955 | |
868dd24b GM |
3956 | /* Update the display */ |
3957 | update_begin (f); | |
5f5c8ee5 | 3958 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3959 | update_end (f); |
3960 | ||
3224dac1 KL |
3961 | if (FRAME_TERMCAP_P (f)) |
3962 | { | |
0b0d3e0b KL |
3963 | if (FRAME_TTY (f)->termscript) |
3964 | fflush (FRAME_TTY (f)->termscript); | |
3965 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3966 | } |
868dd24b | 3967 | |
5f5c8ee5 | 3968 | /* Check window matrices for lost pointers. */ |
2d5912c1 | 3969 | #if GLYPH_DEBUG |
9b0e97aa GM |
3970 | check_window_matrix_pointers (root_window); |
3971 | add_frame_display_history (f, paused_p); | |
3972 | #endif | |
5f5c8ee5 GM |
3973 | } |
3974 | ||
993d4ab6 | 3975 | do_pause: |
5f5c8ee5 GM |
3976 | /* Reset flags indicating that a window should be updated. */ |
3977 | set_window_update_flags (root_window, 0); | |
177c0ea7 | 3978 | |
868dd24b | 3979 | display_completed = !paused_p; |
5f5c8ee5 | 3980 | return paused_p; |
4588ec20 | 3981 | } |
5f5c8ee5 GM |
3982 | |
3983 | ||
4588ec20 | 3984 | \f |
5f5c8ee5 GM |
3985 | /************************************************************************ |
3986 | Window-based updates | |
3987 | ************************************************************************/ | |
3988 | ||
3989 | /* Perform updates in window tree rooted at W. FORCE_P non-zero means | |
3990 | don't stop updating when input is pending. */ | |
3991 | ||
3992 | static int | |
3993 | update_window_tree (w, force_p) | |
3994 | struct window *w; | |
3995 | int force_p; | |
3996 | { | |
3997 | int paused_p = 0; | |
177c0ea7 | 3998 | |
5f5c8ee5 GM |
3999 | while (w && !paused_p) |
4000 | { | |
4001 | if (!NILP (w->hchild)) | |
4002 | paused_p |= update_window_tree (XWINDOW (w->hchild), force_p); | |
4003 | else if (!NILP (w->vchild)) | |
4004 | paused_p |= update_window_tree (XWINDOW (w->vchild), force_p); | |
4005 | else if (w->must_be_updated_p) | |
4006 | paused_p |= update_window (w, force_p); | |
4007 | ||
4008 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
4009 | } | |
4010 | ||
4011 | return paused_p; | |
4012 | } | |
4013 | ||
4014 | ||
4015 | /* Update window W if its flag must_be_updated_p is non-zero. If | |
4016 | FORCE_P is non-zero, don't stop updating if input is pending. */ | |
4017 | ||
4018 | void | |
4019 | update_single_window (w, force_p) | |
4020 | struct window *w; | |
4021 | int force_p; | |
4022 | { | |
4023 | if (w->must_be_updated_p) | |
4024 | { | |
4025 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
4026 | ||
4027 | /* Record that this is not a frame-based redisplay. */ | |
4028 | set_frame_matrix_frame (NULL); | |
4029 | ||
a2130dbb KS |
4030 | if (redisplay_dont_pause) |
4031 | force_p = 1; | |
d012c62b | 4032 | #if PERIODIC_PREEMPTION_CHECKING |
a2130dbb KS |
4033 | else if (NILP (Vredisplay_preemption_period)) |
4034 | force_p = 1; | |
4035 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
4036 | { |
4037 | EMACS_TIME tm; | |
4038 | double p = XFLOATINT (Vredisplay_preemption_period); | |
4039 | int sec, usec; | |
4040 | ||
4041 | sec = (int) p; | |
4042 | usec = (p - sec) * 1000000; | |
4043 | ||
4044 | EMACS_GET_TIME (tm); | |
4045 | EMACS_SET_SECS_USECS (preemption_period, sec, usec); | |
4046 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
4047 | } | |
4048 | #endif | |
4049 | ||
5f5c8ee5 GM |
4050 | /* Update W. */ |
4051 | update_begin (f); | |
4052 | update_window (w, force_p); | |
4053 | update_end (f); | |
4588ec20 | 4054 | |
5f5c8ee5 GM |
4055 | /* Reset flag in W. */ |
4056 | w->must_be_updated_p = 0; | |
4057 | } | |
4058 | } | |
4588ec20 | 4059 | |
93e023fc | 4060 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 4061 | |
408f5064 GM |
4062 | /* Redraw lines from the current matrix of window W that are |
4063 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
4064 | ||
4065 | static void | |
4066 | redraw_overlapped_rows (w, yb) | |
4067 | struct window *w; | |
4068 | int yb; | |
4069 | { | |
d8ee7803 | 4070 | int i; |
fa971ac3 | 4071 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3fc809e2 | 4072 | |
408f5064 GM |
4073 | /* If rows overlapping others have been changed, the rows being |
4074 | overlapped have to be redrawn. This won't draw lines that have | |
4075 | already been drawn in update_window_line because overlapped_p in | |
4076 | desired rows is 0, so after row assignment overlapped_p in | |
4077 | current rows is 0. */ | |
4078 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
4079 | { | |
e876ff42 | 4080 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
4081 | |
4082 | if (!row->enabled_p) | |
4083 | break; | |
4084 | else if (row->mode_line_p) | |
4085 | continue; | |
177c0ea7 | 4086 | |
408f5064 GM |
4087 | if (row->overlapped_p) |
4088 | { | |
4089 | enum glyph_row_area area; | |
177c0ea7 | 4090 | |
408f5064 GM |
4091 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
4092 | { | |
4093 | updated_row = row; | |
4094 | updated_area = area; | |
fa971ac3 KL |
4095 | FRAME_RIF (f)->cursor_to (i, 0, row->y, |
4096 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 4097 | if (row->used[area]) |
fa971ac3 KL |
4098 | FRAME_RIF (f)->write_glyphs (row->glyphs[area], |
4099 | row->used[area]); | |
4100 | FRAME_RIF (f)->clear_end_of_line (-1); | |
408f5064 | 4101 | } |
177c0ea7 | 4102 | |
408f5064 GM |
4103 | row->overlapped_p = 0; |
4104 | } | |
4105 | ||
e876ff42 | 4106 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
4107 | break; |
4108 | } | |
4109 | } | |
4110 | ||
4111 | ||
4112 | /* Redraw lines from the current matrix of window W that overlap | |
4113 | others. YB is bottom-most y-position in W. */ | |
4114 | ||
4115 | static void | |
4116 | redraw_overlapping_rows (w, yb) | |
4117 | struct window *w; | |
4118 | int yb; | |
4119 | { | |
4120 | int i, bottom_y; | |
4121 | struct glyph_row *row; | |
fa971ac3 | 4122 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
3fc809e2 | 4123 | |
408f5064 GM |
4124 | for (i = 0; i < w->current_matrix->nrows; ++i) |
4125 | { | |
4126 | row = w->current_matrix->rows + i; | |
4127 | ||
4128 | if (!row->enabled_p) | |
4129 | break; | |
4130 | else if (row->mode_line_p) | |
4131 | continue; | |
177c0ea7 | 4132 | |
408f5064 GM |
4133 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
4134 | ||
4135 | if (row->overlapping_p && i > 0 && bottom_y < yb) | |
4136 | { | |
41124e06 YM |
4137 | int overlaps = 0; |
4138 | ||
4139 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) | |
4140 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) | |
4141 | overlaps |= OVERLAPS_PRED; | |
4142 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) | |
4143 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) | |
4144 | overlaps |= OVERLAPS_SUCC; | |
4145 | ||
4146 | if (overlaps) | |
4147 | { | |
4148 | if (row->used[LEFT_MARGIN_AREA]) | |
4149 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
4150 | ||
4151 | if (row->used[TEXT_AREA]) | |
4152 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
4153 | ||
4154 | if (row->used[RIGHT_MARGIN_AREA]) | |
4155 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
4156 | ||
4157 | /* Record in neighbour rows that ROW overwrites part of | |
4158 | their display. */ | |
4159 | if (overlaps & OVERLAPS_PRED) | |
4160 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
4161 | if (overlaps & OVERLAPS_SUCC) | |
4162 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
4163 | } | |
408f5064 GM |
4164 | } |
4165 | ||
4166 | if (bottom_y >= yb) | |
4167 | break; | |
4168 | } | |
4169 | } | |
4170 | ||
93e023fc KS |
4171 | #endif /* HAVE_WINDOW_SYSTEM */ |
4172 | ||
408f5064 | 4173 | |
93962bfa GM |
4174 | #ifdef GLYPH_DEBUG |
4175 | ||
4176 | /* Check that no row in the current matrix of window W is enabled | |
4177 | which is below what's displayed in the window. */ | |
4178 | ||
4179 | void | |
4180 | check_current_matrix_flags (w) | |
4181 | struct window *w; | |
4182 | { | |
4183 | int last_seen_p = 0; | |
4184 | int i, yb = window_text_bottom_y (w); | |
4185 | ||
4186 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
4187 | { | |
4188 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
4189 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
4190 | last_seen_p = 1; | |
4191 | else if (last_seen_p && row->enabled_p) | |
4192 | abort (); | |
4193 | } | |
4194 | } | |
4195 | ||
4196 | #endif /* GLYPH_DEBUG */ | |
4197 | ||
4198 | ||
5f5c8ee5 GM |
4199 | /* Update display of window W. FORCE_P non-zero means that we should |
4200 | not stop when detecting pending input. */ | |
4201 | ||
4202 | static int | |
4203 | update_window (w, force_p) | |
4588ec20 | 4204 | struct window *w; |
5f5c8ee5 | 4205 | int force_p; |
4588ec20 | 4206 | { |
5f5c8ee5 GM |
4207 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4208 | int paused_p; | |
d012c62b | 4209 | #if !PERIODIC_PREEMPTION_CHECKING |
5f5c8ee5 | 4210 | int preempt_count = baud_rate / 2400 + 1; |
d012c62b | 4211 | #endif |
5f5c8ee5 | 4212 | extern int input_pending; |
8fd9a666 | 4213 | extern Lisp_Object do_mouse_tracking; |
597cfb3f | 4214 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
b96fd3e8 | 4215 | #if GLYPH_DEBUG |
5f5c8ee5 | 4216 | /* Check that W's frame doesn't have glyph matrices. */ |
82f4a138 | 4217 | xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 4218 | #endif |
5f5c8ee5 GM |
4219 | |
4220 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb KS |
4221 | #if !PERIODIC_PREEMPTION_CHECKING |
4222 | if (!force_p) | |
a2d5fca0 | 4223 | detect_input_pending_ignore_squeezables (); |
d012c62b | 4224 | #endif |
4588ec20 | 4225 | |
5f5c8ee5 GM |
4226 | /* If forced to complete the update, or if no input is pending, do |
4227 | the update. */ | |
8fd9a666 | 4228 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 4229 | { |
5f5c8ee5 GM |
4230 | struct glyph_row *row, *end; |
4231 | struct glyph_row *mode_line_row; | |
56974e03 | 4232 | struct glyph_row *header_line_row; |
e87b8809 | 4233 | int yb, changed_p = 0, mouse_face_overwritten_p = 0, n_updated; |
5f5c8ee5 GM |
4234 | |
4235 | rif->update_window_begin_hook (w); | |
4236 | yb = window_text_bottom_y (w); | |
4237 | ||
153a073c PJ |
4238 | /* If window has a header line, update it before everything else. |
4239 | Adjust y-positions of other rows by the header line height. */ | |
5f5c8ee5 GM |
4240 | row = desired_matrix->rows; |
4241 | end = row + desired_matrix->nrows - 1; | |
177c0ea7 | 4242 | |
5f5c8ee5 | 4243 | if (row->mode_line_p) |
56974e03 GM |
4244 | { |
4245 | header_line_row = row; | |
4246 | ++row; | |
4247 | } | |
4248 | else | |
4249 | header_line_row = NULL; | |
5f5c8ee5 GM |
4250 | |
4251 | /* Update the mode line, if necessary. */ | |
4252 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
4253 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
4254 | { | |
4255 | mode_line_row->y = yb; | |
4256 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
4257 | desired_matrix), |
4258 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
4259 | } |
4260 | ||
4261 | /* Find first enabled row. Optimizations in redisplay_internal | |
4262 | may lead to an update with only one row enabled. There may | |
4263 | be also completely empty matrices. */ | |
4264 | while (row < end && !row->enabled_p) | |
4265 | ++row; | |
177c0ea7 | 4266 | |
bfdcafe1 | 4267 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 4268 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
4269 | { |
4270 | int rc = scrolling_window (w, header_line_row != NULL); | |
4271 | if (rc < 0) | |
4272 | { | |
4273 | /* All rows were found to be equal. */ | |
4274 | paused_p = 0; | |
4275 | goto set_cursor; | |
4276 | } | |
4277 | else if (rc > 0) | |
6b61353c KH |
4278 | { |
4279 | /* We've scrolled the display. */ | |
4280 | force_p = 1; | |
4281 | changed_p = 1; | |
4282 | } | |
5f5c8ee5 GM |
4283 | } |
4284 | ||
4285 | /* Update the rest of the lines. */ | |
e87b8809 | 4286 | for (n_updated = 0; row < end && (force_p || !input_pending); ++row) |
b7412313 | 4287 | if (row->enabled_p) |
5f5c8ee5 GM |
4288 | { |
4289 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
4290 | int i; | |
177c0ea7 | 4291 | |
153a073c | 4292 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
4293 | detect_input_pending. If it's done too often, |
4294 | scrolling large windows with repeated scroll-up | |
4295 | commands will too quickly pause redisplay. */ | |
d012c62b KS |
4296 | #if PERIODIC_PREEMPTION_CHECKING |
4297 | if (!force_p) | |
4298 | { | |
4299 | EMACS_TIME tm, dif; | |
4300 | EMACS_GET_TIME (tm); | |
4301 | EMACS_SUB_TIME (dif, preemption_next_check, tm); | |
4302 | if (EMACS_TIME_NEG_P (dif)) | |
4303 | { | |
4304 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
4305 | if (detect_input_pending_ignore_squeezables ()) |
4306 | break; | |
d012c62b KS |
4307 | } |
4308 | } | |
4309 | #else | |
e87b8809 | 4310 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 4311 | detect_input_pending_ignore_squeezables (); |
d012c62b | 4312 | #endif |
e876ff42 GM |
4313 | changed_p |= update_window_line (w, vpos, |
4314 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
4315 | |
4316 | /* Mark all rows below the last visible one in the current | |
4317 | matrix as invalid. This is necessary because of | |
4318 | variable line heights. Consider the case of three | |
4319 | successive redisplays, where the first displays 5 | |
4320 | lines, the second 3 lines, and the third 5 lines again. | |
4321 | If the second redisplay wouldn't mark rows in the | |
4322 | current matrix invalid, the third redisplay might be | |
4323 | tempted to optimize redisplay based on lines displayed | |
4324 | in the first redisplay. */ | |
4325 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
4326 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
4327 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
4328 | } | |
4329 | ||
4330 | /* Was display preempted? */ | |
4331 | paused_p = row < end; | |
177c0ea7 | 4332 | |
56974e03 | 4333 | set_cursor: |
177c0ea7 | 4334 | |
6b61353c KH |
4335 | /* Update the header line after scrolling because a new header |
4336 | line would otherwise overwrite lines at the top of the window | |
4337 | that can be scrolled. */ | |
4338 | if (header_line_row && header_line_row->enabled_p) | |
4339 | { | |
4340 | header_line_row->y = 0; | |
4341 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
6b61353c KH |
4342 | } |
4343 | ||
153a073c | 4344 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
4345 | if (!paused_p && !w->pseudo_window_p) |
4346 | { | |
93e023fc | 4347 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
4348 | if (changed_p && rif->fix_overlapping_area) |
4349 | { | |
4350 | redraw_overlapped_rows (w, yb); | |
4351 | redraw_overlapping_rows (w, yb); | |
4352 | } | |
93e023fc | 4353 | #endif |
177c0ea7 | 4354 | |
5f5c8ee5 GM |
4355 | /* Make cursor visible at cursor position of W. */ |
4356 | set_window_cursor_after_update (w); | |
4357 | ||
e876ff42 GM |
4358 | #if 0 /* Check that current matrix invariants are satisfied. This is |
4359 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
4360 | IF_DEBUG (check_matrix_invariants (w)); |
4361 | #endif | |
4588ec20 | 4362 | } |
5f5c8ee5 GM |
4363 | |
4364 | #if GLYPH_DEBUG | |
4365 | /* Remember the redisplay method used to display the matrix. */ | |
4366 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
4367 | #endif | |
408f5064 | 4368 | |
6b61353c KH |
4369 | #ifdef HAVE_WINDOW_SYSTEM |
4370 | update_window_fringes (w, 0); | |
4371 | #endif | |
4372 | ||
56974e03 GM |
4373 | /* End the update of window W. Don't set the cursor if we |
4374 | paused updating the display because in this case, | |
4375 | set_window_cursor_after_update hasn't been called, and | |
4376 | output_cursor doesn't contain the cursor location. */ | |
4377 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); | |
4588ec20 | 4378 | } |
5f5c8ee5 GM |
4379 | else |
4380 | paused_p = 1; | |
4381 | ||
2d5912c1 | 4382 | #if GLYPH_DEBUG |
0cffd9d8 | 4383 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
4384 | add_window_display_history (w, w->current_matrix->method, paused_p); |
4385 | #endif | |
177c0ea7 | 4386 | |
5f5c8ee5 | 4387 | clear_glyph_matrix (desired_matrix); |
408f5064 | 4388 | |
5f5c8ee5 | 4389 | return paused_p; |
4588ec20 JB |
4390 | } |
4391 | ||
b64b3980 | 4392 | |
5f5c8ee5 GM |
4393 | /* Update the display of area AREA in window W, row number VPOS. |
4394 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
4395 | ||
4396 | static void | |
4397 | update_marginal_area (w, area, vpos) | |
b64b3980 | 4398 | struct window *w; |
5f5c8ee5 | 4399 | int area, vpos; |
b64b3980 | 4400 | { |
5f5c8ee5 | 4401 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 4402 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4403 | |
4404 | /* Let functions in xterm.c know what area subsequent X positions | |
4405 | will be relative to. */ | |
4406 | updated_area = area; | |
4407 | ||
4408 | /* Set cursor to start of glyphs, write them, and clear to the end | |
4409 | of the area. I don't think that something more sophisticated is | |
4410 | necessary here, since marginal areas will not be the default. */ | |
4411 | rif->cursor_to (vpos, 0, desired_row->y, 0); | |
4412 | if (desired_row->used[area]) | |
4413 | rif->write_glyphs (desired_row->glyphs[area], desired_row->used[area]); | |
4414 | rif->clear_end_of_line (-1); | |
b64b3980 | 4415 | } |
23b0200c | 4416 | |
352f1545 | 4417 | |
408f5064 GM |
4418 | /* Update the display of the text area of row VPOS in window W. |
4419 | Value is non-zero if display has changed. */ | |
5f5c8ee5 | 4420 | |
408f5064 | 4421 | static int |
5f5c8ee5 | 4422 | update_text_area (w, vpos) |
23b0200c | 4423 | struct window *w; |
5f5c8ee5 | 4424 | int vpos; |
23b0200c | 4425 | { |
5f5c8ee5 GM |
4426 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
4427 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 4428 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 4429 | int changed_p = 0; |
5f5c8ee5 GM |
4430 | |
4431 | /* Let functions in xterm.c know what area subsequent X positions | |
4432 | will be relative to. */ | |
4433 | updated_area = TEXT_AREA; | |
177c0ea7 | 4434 | |
5f5c8ee5 GM |
4435 | /* If rows are at different X or Y, or rows have different height, |
4436 | or the current row is marked invalid, write the entire line. */ | |
4437 | if (!current_row->enabled_p | |
4438 | || desired_row->y != current_row->y | |
4439 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
4440 | || desired_row->phys_ascent != current_row->phys_ascent |
4441 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 4442 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 4443 | || current_row->overlapped_p |
fee8b690 CY |
4444 | /* This next line is necessary for correctly redrawing |
4445 | mouse-face areas after scrolling and other operations. | |
4446 | However, it causes excessive flickering when mouse is moved | |
4447 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
4448 | line doesn't seem to hurt anything. -- cyd. |
4449 | But it is still needed for the header line. -- kfs. */ | |
4450 | || (current_row->mouse_face_p | |
4451 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
4452 | || current_row->x != desired_row->x) |
4453 | { | |
4454 | rif->cursor_to (vpos, 0, desired_row->y, desired_row->x); | |
177c0ea7 | 4455 | |
5f5c8ee5 GM |
4456 | if (desired_row->used[TEXT_AREA]) |
4457 | rif->write_glyphs (desired_row->glyphs[TEXT_AREA], | |
4458 | desired_row->used[TEXT_AREA]); | |
177c0ea7 | 4459 | |
5f5c8ee5 GM |
4460 | /* Clear to end of window. */ |
4461 | rif->clear_end_of_line (-1); | |
408f5064 | 4462 | changed_p = 1; |
60f2f3f1 GM |
4463 | |
4464 | /* This erases the cursor. We do this here because | |
4465 | notice_overwritten_cursor cannot easily check this, which | |
4466 | might indicate that the whole functionality of | |
4467 | notice_overwritten_cursor would better be implemented here. | |
4468 | On the other hand, we need notice_overwritten_cursor as long | |
4469 | as mouse highlighting is done asynchronously outside of | |
4470 | redisplay. */ | |
4471 | if (vpos == w->phys_cursor.vpos) | |
4472 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
4473 | } |
4474 | else | |
4475 | { | |
4476 | int stop, i, x; | |
4477 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
4478 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
e47306e6 | 4479 | int overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 4480 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
5f5c8ee5 | 4481 | |
78897758 YM |
4482 | /* If the desired row extends its face to the text area end, and |
4483 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
4484 | make sure we write at least one glyph, so that the face |
4485 | extension actually takes place. */ | |
78897758 YM |
4486 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
4487 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
4488 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
4489 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 4490 | --desired_stop_pos; |
177c0ea7 | 4491 | |
5f5c8ee5 GM |
4492 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
4493 | i = 0; | |
4494 | x = desired_row->x; | |
8399f8a0 GM |
4495 | |
4496 | /* Loop over glyphs that current and desired row may have | |
4497 | in common. */ | |
5f5c8ee5 | 4498 | while (i < stop) |
352f1545 | 4499 | { |
6d950f4c | 4500 | int can_skip_p = 1; |
177c0ea7 | 4501 | |
5f5c8ee5 | 4502 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
4503 | don't have to be written. We can't skip if the last |
4504 | current glyph overlaps the glyph to its right. For | |
4505 | example, consider a current row of `if ' with the `f' in | |
4506 | Courier bold so that it overlaps the ` ' to its right. | |
4507 | If the desired row is ` ', we would skip over the space | |
4508 | after the `if' and there would remain a pixel from the | |
4509 | `f' on the screen. */ | |
4510 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 4511 | { |
e47306e6 GM |
4512 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
4513 | int left, right; | |
177c0ea7 | 4514 | |
e47306e6 GM |
4515 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
4516 | &left, &right); | |
6d950f4c | 4517 | can_skip_p = right == 0; |
352f1545 | 4518 | } |
177c0ea7 | 4519 | |
6d950f4c | 4520 | if (can_skip_p) |
352f1545 | 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 | } | |
5f5c8ee5 | 4553 | } |
352f1545 | 4554 | } |
177c0ea7 | 4555 | |
5f5c8ee5 GM |
4556 | /* Try to avoid writing the entire rest of the desired row |
4557 | by looking for a resync point. This mainly prevents | |
4558 | mode line flickering in the case the mode line is in | |
4559 | fixed-pitch font, which it usually will be. */ | |
4560 | if (i < desired_row->used[TEXT_AREA]) | |
4561 | { | |
4562 | int start_x = x, start_hpos = i; | |
4563 | struct glyph *start = desired_glyph; | |
4564 | int current_x = x; | |
6d950f4c GM |
4565 | int skip_first_p = !can_skip_p; |
4566 | ||
5f5c8ee5 GM |
4567 | /* Find the next glyph that's equal again. */ |
4568 | while (i < stop | |
6d950f4c GM |
4569 | && (skip_first_p |
4570 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
4571 | && x == current_x) |
4572 | { | |
4573 | x += desired_glyph->pixel_width; | |
4574 | current_x += current_glyph->pixel_width; | |
4575 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 4576 | skip_first_p = 0; |
5f5c8ee5 | 4577 | } |
23b0200c | 4578 | |
5f5c8ee5 GM |
4579 | if (i == start_hpos || x != current_x) |
4580 | { | |
4581 | i = start_hpos; | |
4582 | x = start_x; | |
4583 | desired_glyph = start; | |
4584 | break; | |
4585 | } | |
e47306e6 | 4586 | |
5f5c8ee5 GM |
4587 | rif->cursor_to (vpos, start_hpos, desired_row->y, start_x); |
4588 | rif->write_glyphs (start, i - start_hpos); | |
408f5064 | 4589 | changed_p = 1; |
5f5c8ee5 GM |
4590 | } |
4591 | } | |
177c0ea7 | 4592 | |
5f5c8ee5 GM |
4593 | /* Write the rest. */ |
4594 | if (i < desired_row->used[TEXT_AREA]) | |
4595 | { | |
4596 | rif->cursor_to (vpos, i, desired_row->y, x); | |
4597 | rif->write_glyphs (desired_glyph, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 4598 | changed_p = 1; |
5f5c8ee5 | 4599 | } |
177c0ea7 | 4600 | |
5f5c8ee5 GM |
4601 | /* Maybe clear to end of line. */ |
4602 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
4603 | { | |
4604 | /* If new row extends to the end of the text area, nothing | |
4605 | has to be cleared, if and only if we did a write_glyphs | |
4606 | above. This is made sure by setting desired_stop_pos | |
4607 | appropriately above. */ | |
78897758 YM |
4608 | xassert (i < desired_row->used[TEXT_AREA] |
4609 | || ((desired_row->used[TEXT_AREA] | |
4610 | == current_row->used[TEXT_AREA]) | |
4611 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
4612 | } |
4613 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
4614 | { | |
4615 | /* If old row extends to the end of the text area, clear. */ | |
4616 | if (i >= desired_row->used[TEXT_AREA]) | |
4617 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 4618 | desired_row->pixel_width); |
5f5c8ee5 | 4619 | rif->clear_end_of_line (-1); |
408f5064 | 4620 | changed_p = 1; |
5f5c8ee5 GM |
4621 | } |
4622 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 4623 | { |
5f5c8ee5 GM |
4624 | /* Otherwise clear to the end of the old row. Everything |
4625 | after that position should be clear already. */ | |
4626 | int x; | |
177c0ea7 | 4627 | |
5f5c8ee5 GM |
4628 | if (i >= desired_row->used[TEXT_AREA]) |
4629 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 4630 | desired_row->pixel_width); |
5f5c8ee5 GM |
4631 | |
4632 | /* If cursor is displayed at the end of the line, make sure | |
4633 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
4634 | with which to erase the cursor (because this method | |
4635 | doesn't work with lbearing/rbearing), so we must do it | |
4636 | this way. */ | |
4637 | if (vpos == w->phys_cursor.vpos | |
4638 | && w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]) | |
4639 | { | |
4640 | w->phys_cursor_on_p = 0; | |
4641 | x = -1; | |
4642 | } | |
4643 | else | |
6b61353c | 4644 | x = current_row->pixel_width; |
5f5c8ee5 | 4645 | rif->clear_end_of_line (x); |
408f5064 | 4646 | changed_p = 1; |
2e8907d3 | 4647 | } |
23b0200c | 4648 | } |
408f5064 GM |
4649 | |
4650 | return changed_p; | |
23b0200c | 4651 | } |
4588ec20 | 4652 | |
5f5c8ee5 | 4653 | |
408f5064 GM |
4654 | /* Update row VPOS in window W. Value is non-zero if display has been |
4655 | changed. */ | |
5f5c8ee5 | 4656 | |
408f5064 | 4657 | static int |
e876ff42 | 4658 | update_window_line (w, vpos, mouse_face_overwritten_p) |
5f5c8ee5 | 4659 | struct window *w; |
e876ff42 | 4660 | int vpos, *mouse_face_overwritten_p; |
5f5c8ee5 GM |
4661 | { |
4662 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
4663 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 4664 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 4665 | int changed_p = 0; |
5f5c8ee5 | 4666 | |
5f5c8ee5 GM |
4667 | /* Set the row being updated. This is important to let xterm.c |
4668 | know what line height values are in effect. */ | |
4669 | updated_row = desired_row; | |
4670 | ||
177c0ea7 JB |
4671 | /* A row can be completely invisible in case a desired matrix was |
4672 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
4673 | the matrix. Make sure to make such rows current anyway, since |
4674 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
4675 | if (desired_row->mode_line_p |
4676 | || desired_row->visible_height > 0) | |
408f5064 | 4677 | { |
504805ac GM |
4678 | xassert (desired_row->enabled_p); |
4679 | ||
4680 | /* Update display of the left margin area, if there is one. */ | |
4681 | if (!desired_row->full_width_p | |
7df02016 | 4682 | && !NILP (w->left_margin_cols)) |
504805ac GM |
4683 | { |
4684 | changed_p = 1; | |
4685 | update_marginal_area (w, LEFT_MARGIN_AREA, vpos); | |
4686 | } | |
177c0ea7 | 4687 | |
504805ac GM |
4688 | /* Update the display of the text area. */ |
4689 | if (update_text_area (w, vpos)) | |
4690 | { | |
4691 | changed_p = 1; | |
4692 | if (current_row->mouse_face_p) | |
4693 | *mouse_face_overwritten_p = 1; | |
4694 | } | |
177c0ea7 | 4695 | |
504805ac GM |
4696 | /* Update display of the right margin area, if there is one. */ |
4697 | if (!desired_row->full_width_p | |
7df02016 | 4698 | && !NILP (w->right_margin_cols)) |
504805ac GM |
4699 | { |
4700 | changed_p = 1; | |
4701 | update_marginal_area (w, RIGHT_MARGIN_AREA, vpos); | |
4702 | } | |
177c0ea7 | 4703 | |
504805ac GM |
4704 | /* Draw truncation marks etc. */ |
4705 | if (!current_row->enabled_p | |
4706 | || desired_row->y != current_row->y | |
4707 | || desired_row->visible_height != current_row->visible_height | |
6b61353c | 4708 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 4709 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
6b61353c | 4710 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 4711 | || desired_row->mode_line_p != current_row->mode_line_p |
6b61353c | 4712 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
4713 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
4714 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
4715 | rif->after_update_window_line_hook (desired_row); | |
408f5064 | 4716 | } |
177c0ea7 | 4717 | |
5f5c8ee5 GM |
4718 | /* Update current_row from desired_row. */ |
4719 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
4720 | updated_row = NULL; | |
408f5064 | 4721 | return changed_p; |
5f5c8ee5 GM |
4722 | } |
4723 | ||
4724 | ||
4725 | /* Set the cursor after an update of window W. This function may only | |
4726 | be called from update_window. */ | |
4727 | ||
4728 | static void | |
4729 | set_window_cursor_after_update (w) | |
4588ec20 JB |
4730 | struct window *w; |
4731 | { | |
5f5c8ee5 | 4732 | struct frame *f = XFRAME (w->frame); |
fa971ac3 | 4733 | struct redisplay_interface *rif = FRAME_RIF (f); |
5f5c8ee5 GM |
4734 | int cx, cy, vpos, hpos; |
4735 | ||
4736 | /* Not intended for frame matrix updates. */ | |
4737 | xassert (FRAME_WINDOW_P (f)); | |
177c0ea7 | 4738 | |
b96fd3e8 GM |
4739 | if (cursor_in_echo_area |
4740 | && !NILP (echo_area_buffer[0]) | |
4741 | /* If we are showing a message instead of the mini-buffer, | |
4742 | show the cursor for the message instead. */ | |
4743 | && XWINDOW (minibuf_window) == w | |
4744 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
4745 | /* These cases apply only to the frame that contains |
4746 | the active mini-buffer window. */ | |
4747 | && FRAME_HAS_MINIBUF_P (f) | |
4748 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
4749 | { | |
4750 | cx = cy = vpos = hpos = 0; | |
4751 | ||
4752 | if (cursor_in_echo_area >= 0) | |
4753 | { | |
4754 | /* If the mini-buffer is several lines high, find the last | |
4755 | line that has any text on it. Note: either all lines | |
4756 | are enabled or none. Otherwise we wouldn't be able to | |
4757 | determine Y. */ | |
862b4790 GM |
4758 | struct glyph_row *row, *last_row; |
4759 | struct glyph *glyph; | |
4760 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 4761 | |
862b4790 | 4762 | last_row = NULL; |
6206f8ce GM |
4763 | row = w->current_matrix->rows; |
4764 | while (row->enabled_p | |
4765 | && (last_row == NULL | |
4766 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 4767 | { |
862b4790 GM |
4768 | if (row->used[TEXT_AREA] |
4769 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
4770 | last_row = row; | |
6206f8ce | 4771 | ++row; |
862b4790 | 4772 | } |
177c0ea7 | 4773 | |
5f5c8ee5 GM |
4774 | if (last_row) |
4775 | { | |
6206f8ce GM |
4776 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
4777 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 4778 | |
b96fd3e8 | 4779 | while (last > start && last->charpos < 0) |
862b4790 | 4780 | --last; |
177c0ea7 | 4781 | |
862b4790 GM |
4782 | for (glyph = start; glyph < last; ++glyph) |
4783 | { | |
4784 | cx += glyph->pixel_width; | |
4785 | ++hpos; | |
4786 | } | |
4787 | ||
5f5c8ee5 | 4788 | cy = last_row->y; |
862b4790 | 4789 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
4790 | } |
4791 | } | |
4792 | } | |
4793 | else | |
4794 | { | |
4795 | cx = w->cursor.x; | |
4796 | cy = w->cursor.y; | |
4797 | hpos = w->cursor.hpos; | |
4798 | vpos = w->cursor.vpos; | |
4799 | } | |
4588ec20 | 4800 | |
5f5c8ee5 GM |
4801 | /* Window cursor can be out of sync for horizontally split windows. */ |
4802 | hpos = max (0, hpos); | |
4803 | hpos = min (w->current_matrix->matrix_w - 1, hpos); | |
4804 | vpos = max (0, vpos); | |
4805 | vpos = min (w->current_matrix->nrows - 1, vpos); | |
4806 | rif->cursor_to (vpos, hpos, cy, cx); | |
4588ec20 | 4807 | } |
4588ec20 | 4808 | |
5f5c8ee5 | 4809 | |
6df5d75f GM |
4810 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window |
4811 | tree rooted at W. */ | |
4812 | ||
4813 | void | |
4814 | set_window_update_flags (w, on_p) | |
4815 | struct window *w; | |
4816 | int on_p; | |
4817 | { | |
4818 | while (w) | |
4819 | { | |
4820 | if (!NILP (w->hchild)) | |
4821 | set_window_update_flags (XWINDOW (w->hchild), on_p); | |
4822 | else if (!NILP (w->vchild)) | |
4823 | set_window_update_flags (XWINDOW (w->vchild), on_p); | |
4824 | else | |
4825 | w->must_be_updated_p = on_p; | |
4826 | ||
4827 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
4828 | } | |
177c0ea7 | 4829 | } |
6df5d75f GM |
4830 | |
4831 | ||
4832 | \f | |
4833 | /*********************************************************************** | |
4834 | Window-Based Scrolling | |
4835 | ***********************************************************************/ | |
4836 | ||
4837 | /* Structure describing rows in scrolling_window. */ | |
4838 | ||
4839 | struct row_entry | |
4840 | { | |
4841 | /* Number of occurrences of this row in desired and current matrix. */ | |
4842 | int old_uses, new_uses; | |
177c0ea7 | 4843 | |
6df5d75f GM |
4844 | /* Vpos of row in new matrix. */ |
4845 | int new_line_number; | |
4846 | ||
4847 | /* Bucket index of this row_entry in the hash table row_table. */ | |
4848 | int bucket; | |
177c0ea7 | 4849 | |
6df5d75f GM |
4850 | /* The row described by this entry. */ |
4851 | struct glyph_row *row; | |
177c0ea7 | 4852 | |
6df5d75f GM |
4853 | /* Hash collision chain. */ |
4854 | struct row_entry *next; | |
4855 | }; | |
4856 | ||
4857 | /* A pool to allocate row_entry structures from, and the size of the | |
4858 | pool. The pool is reallocated in scrolling_window when we find | |
4859 | that we need a larger one. */ | |
4860 | ||
4861 | static struct row_entry *row_entry_pool; | |
4862 | static int row_entry_pool_size; | |
4863 | ||
4864 | /* Index of next free entry in row_entry_pool. */ | |
4865 | ||
4866 | static int row_entry_idx; | |
4867 | ||
4868 | /* The hash table used during scrolling, and the table's size. This | |
4869 | table is used to quickly identify equal rows in the desired and | |
4870 | current matrix. */ | |
4871 | ||
4872 | static struct row_entry **row_table; | |
4873 | static int row_table_size; | |
4874 | ||
4875 | /* Vectors of pointers to row_entry structures belonging to the | |
4876 | current and desired matrix, and the size of the vectors. */ | |
4877 | ||
4878 | static struct row_entry **old_lines, **new_lines; | |
4879 | static int old_lines_size, new_lines_size; | |
4880 | ||
4881 | /* A pool to allocate run structures from, and its size. */ | |
4882 | ||
4883 | static struct run *run_pool; | |
4884 | static int runs_size; | |
4885 | ||
4886 | /* A vector of runs of lines found during scrolling. */ | |
4887 | ||
4888 | static struct run **runs; | |
4889 | ||
6df5d75f GM |
4890 | /* Add glyph row ROW to the scrolling hash table during the scrolling |
4891 | of window W. */ | |
4892 | ||
4893 | static INLINE struct row_entry * | |
4894 | add_row_entry (w, row) | |
4895 | struct window *w; | |
4896 | struct glyph_row *row; | |
4897 | { | |
4898 | struct row_entry *entry; | |
4899 | int i = row->hash % row_table_size; | |
177c0ea7 | 4900 | |
6df5d75f | 4901 | entry = row_table[i]; |
e4e0bee9 | 4902 | while (entry && !row_equal_p (w, entry->row, row, 1)) |
6df5d75f | 4903 | entry = entry->next; |
177c0ea7 | 4904 | |
6df5d75f GM |
4905 | if (entry == NULL) |
4906 | { | |
4907 | entry = row_entry_pool + row_entry_idx++; | |
4908 | entry->row = row; | |
4909 | entry->old_uses = entry->new_uses = 0; | |
4910 | entry->new_line_number = 0; | |
4911 | entry->bucket = i; | |
4912 | entry->next = row_table[i]; | |
4913 | row_table[i] = entry; | |
4914 | } | |
4915 | ||
4916 | return entry; | |
4917 | } | |
4918 | ||
4919 | ||
5f5c8ee5 | 4920 | /* Try to reuse part of the current display of W by scrolling lines. |
153a073c | 4921 | HEADER_LINE_P non-zero means W has a header line. |
5f5c8ee5 GM |
4922 | |
4923 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4924 | Technique for Isolating Differences Between Files." It should take | |
4925 | O(N) time. | |
4926 | ||
4927 | A short outline of the steps of the algorithm | |
4928 | ||
4929 | 1. Skip lines equal at the start and end of both matrices. | |
4930 | ||
4931 | 2. Enter rows in the current and desired matrix into a symbol | |
4932 | table, counting how often they appear in both matrices. | |
4933 | ||
4934 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4935 | i.e. we assume that such lines are likely to have been moved. | |
4936 | ||
4937 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4938 | forward and backward. | |
4939 | ||
4940 | Value is | |
4941 | ||
4942 | -1 if all rows were found to be equal. | |
4943 | 0 to indicate that we did not scroll the display, or | |
4944 | 1 if we did scroll. */ | |
4945 | ||
4946 | static int | |
045dee35 | 4947 | scrolling_window (w, header_line_p) |
5f5c8ee5 | 4948 | struct window *w; |
045dee35 | 4949 | int header_line_p; |
4588ec20 | 4950 | { |
5f5c8ee5 GM |
4951 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4952 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4953 | int yb = window_text_bottom_y (w); | |
6df5d75f GM |
4954 | int i, j, first_old, first_new, last_old, last_new; |
4955 | int nruns, nbytes, n, run_idx; | |
4956 | struct row_entry *entry; | |
fa971ac3 | 4957 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4958 | |
4959 | /* Skip over rows equal at the start. */ | |
bfdcafe1 | 4960 | for (i = header_line_p ? 1 : 0; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4961 | { |
bfdcafe1 GM |
4962 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4963 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4964 | ||
4965 | if (c->enabled_p | |
4966 | && d->enabled_p | |
6b61353c | 4967 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4968 | && c->y == d->y |
4969 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4970 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
4971 | && row_equal_p (w, c, d, 1)) | |
4972 | { | |
4973 | assign_row (c, d); | |
4974 | d->enabled_p = 0; | |
4975 | } | |
4976 | else | |
4977 | break; | |
5f5c8ee5 | 4978 | } |
4588ec20 | 4979 | |
5f5c8ee5 GM |
4980 | /* Give up if some rows in the desired matrix are not enabled. */ |
4981 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4982 | return -1; | |
177c0ea7 | 4983 | |
5f5c8ee5 GM |
4984 | first_old = first_new = i; |
4985 | ||
4986 | /* Set last_new to the index + 1 of the last enabled row in the | |
4987 | desired matrix. */ | |
4988 | i = first_new + 1; | |
4989 | while (i < desired_matrix->nrows - 1 | |
4990 | && MATRIX_ROW (desired_matrix, i)->enabled_p | |
6df5d75f | 4991 | && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)) <= yb) |
5f5c8ee5 GM |
4992 | ++i; |
4993 | ||
4994 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4995 | return 0; | |
4996 | ||
4997 | last_new = i; | |
4998 | ||
4999 | /* Set last_old to the index + 1 of the last enabled row in the | |
5000 | current matrix. We don't look at the enabled flag here because | |
5001 | we plan to reuse part of the display even if other parts are | |
5002 | disabled. */ | |
5003 | i = first_old + 1; | |
93962bfa GM |
5004 | while (i < current_matrix->nrows - 1) |
5005 | { | |
5006 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
5007 | if (bottom <= yb) | |
5008 | ++i; | |
5009 | if (bottom >= yb) | |
5010 | break; | |
5011 | } | |
5012 | ||
5f5c8ee5 GM |
5013 | last_old = i; |
5014 | ||
5015 | /* Skip over rows equal at the bottom. */ | |
5016 | i = last_new; | |
5017 | j = last_old; | |
5018 | while (i - 1 > first_new | |
5019 | && j - 1 > first_old | |
5020 | && MATRIX_ROW (current_matrix, i - 1)->enabled_p | |
5021 | && (MATRIX_ROW (current_matrix, i - 1)->y | |
5022 | == MATRIX_ROW (desired_matrix, j - 1)->y) | |
6b61353c | 5023 | && !MATRIX_ROW (desired_matrix, j - 1)->redraw_fringe_bitmaps_p |
5f5c8ee5 GM |
5024 | && row_equal_p (w, |
5025 | MATRIX_ROW (desired_matrix, i - 1), | |
e4e0bee9 | 5026 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
5027 | --i, --j; |
5028 | last_new = i; | |
5029 | last_old = j; | |
5030 | ||
5031 | /* Nothing to do if all rows are equal. */ | |
5032 | if (last_new == first_new) | |
5033 | return 0; | |
5034 | ||
6df5d75f | 5035 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 5036 | |
6df5d75f GM |
5037 | if (current_matrix->nrows > old_lines_size) |
5038 | { | |
5039 | old_lines_size = current_matrix->nrows; | |
5040 | nbytes = old_lines_size * sizeof *old_lines; | |
5041 | old_lines = (struct row_entry **) xrealloc (old_lines, nbytes); | |
5042 | } | |
177c0ea7 | 5043 | |
6df5d75f GM |
5044 | if (desired_matrix->nrows > new_lines_size) |
5045 | { | |
5046 | new_lines_size = desired_matrix->nrows; | |
5047 | nbytes = new_lines_size * sizeof *new_lines; | |
5048 | new_lines = (struct row_entry **) xrealloc (new_lines, nbytes); | |
5049 | } | |
5050 | ||
5051 | n = desired_matrix->nrows + current_matrix->nrows; | |
5052 | if (3 * n > row_table_size) | |
5053 | { | |
5054 | row_table_size = next_almost_prime (3 * n); | |
5055 | nbytes = row_table_size * sizeof *row_table; | |
5056 | row_table = (struct row_entry **) xrealloc (row_table, nbytes); | |
5057 | bzero (row_table, nbytes); | |
5058 | } | |
5059 | ||
5060 | if (n > row_entry_pool_size) | |
5061 | { | |
5062 | row_entry_pool_size = n; | |
5063 | nbytes = row_entry_pool_size * sizeof *row_entry_pool; | |
5064 | row_entry_pool = (struct row_entry *) xrealloc (row_entry_pool, nbytes); | |
5065 | } | |
5066 | ||
5067 | if (desired_matrix->nrows > runs_size) | |
5068 | { | |
5069 | runs_size = desired_matrix->nrows; | |
5070 | nbytes = runs_size * sizeof *runs; | |
5071 | runs = (struct run **) xrealloc (runs, nbytes); | |
5072 | nbytes = runs_size * sizeof *run_pool; | |
5073 | run_pool = (struct run *) xrealloc (run_pool, nbytes); | |
5074 | } | |
5075 | ||
5076 | nruns = run_idx = 0; | |
5077 | row_entry_idx = 0; | |
5078 | ||
5079 | /* Add rows from the current and desired matrix to the hash table | |
5080 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 5081 | |
5f5c8ee5 GM |
5082 | for (i = first_old; i < last_old; ++i) |
5083 | { | |
5084 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
5085 | { | |
6df5d75f GM |
5086 | entry = add_row_entry (w, MATRIX_ROW (current_matrix, i)); |
5087 | old_lines[i] = entry; | |
5088 | ++entry->old_uses; | |
5f5c8ee5 GM |
5089 | } |
5090 | else | |
6df5d75f | 5091 | old_lines[i] = NULL; |
5f5c8ee5 GM |
5092 | } |
5093 | ||
5f5c8ee5 GM |
5094 | for (i = first_new; i < last_new; ++i) |
5095 | { | |
5096 | xassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); | |
6df5d75f GM |
5097 | entry = add_row_entry (w, MATRIX_ROW (desired_matrix, i)); |
5098 | ++entry->new_uses; | |
5099 | entry->new_line_number = i; | |
5100 | new_lines[i] = entry; | |
5f5c8ee5 | 5101 | } |
4588ec20 | 5102 | |
5f5c8ee5 GM |
5103 | /* Identify moves based on lines that are unique and equal |
5104 | in both matrices. */ | |
5105 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
5106 | if (old_lines[i] |
5107 | && old_lines[i]->old_uses == 1 | |
5108 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 GM |
5109 | { |
5110 | int j, k; | |
6df5d75f GM |
5111 | int new_line = old_lines[i]->new_line_number; |
5112 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
5113 | |
5114 | /* Record move. */ | |
5115 | run->current_vpos = i; | |
5116 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
5117 | run->desired_vpos = new_line; | |
5118 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
5119 | run->nrows = 1; | |
5120 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
5121 | ||
5122 | /* Extend backward. */ | |
5123 | j = i - 1; | |
5124 | k = new_line - 1; | |
5125 | while (j > first_old | |
5126 | && k > first_new | |
6df5d75f | 5127 | && old_lines[j] == new_lines[k]) |
5f5c8ee5 GM |
5128 | { |
5129 | int h = MATRIX_ROW (current_matrix, j)->height; | |
177c0ea7 JB |
5130 | --run->current_vpos; |
5131 | --run->desired_vpos; | |
5f5c8ee5 GM |
5132 | ++run->nrows; |
5133 | run->height += h; | |
5134 | run->desired_y -= h; | |
5135 | run->current_y -= h; | |
5136 | --j, --k; | |
5137 | } | |
4588ec20 | 5138 | |
5f5c8ee5 GM |
5139 | /* Extend forward. */ |
5140 | j = i + 1; | |
5141 | k = new_line + 1; | |
5142 | while (j < last_old | |
5143 | && k < last_new | |
6df5d75f | 5144 | && old_lines[j] == new_lines[k]) |
5f5c8ee5 GM |
5145 | { |
5146 | int h = MATRIX_ROW (current_matrix, j)->height; | |
177c0ea7 | 5147 | ++run->nrows; |
5f5c8ee5 GM |
5148 | run->height += h; |
5149 | ++j, ++k; | |
5150 | } | |
19dff8dc | 5151 | |
5f5c8ee5 GM |
5152 | /* Insert run into list of all runs. Order runs by copied |
5153 | pixel lines. Note that we record runs that don't have to | |
5154 | be copied because they are already in place. This is done | |
5155 | because we can avoid calling update_window_line in this | |
5156 | case. */ | |
5157 | for (j = 0; j < nruns && runs[j]->height > run->height; ++j) | |
5158 | ; | |
2b4ec4d7 | 5159 | for (k = nruns; k > j; --k) |
5f5c8ee5 GM |
5160 | runs[k] = runs[k - 1]; |
5161 | runs[j] = run; | |
5162 | ++nruns; | |
5163 | ||
5164 | i += run->nrows; | |
5165 | } | |
5166 | else | |
5167 | ++i; | |
4588ec20 | 5168 | |
5f5c8ee5 GM |
5169 | /* Do the moves. Do it in a way that we don't overwrite something |
5170 | we want to copy later on. This is not solvable in general | |
5171 | because there is only one display and we don't have a way to | |
5172 | exchange areas on this display. Example: | |
4588ec20 | 5173 | |
5f5c8ee5 GM |
5174 | +-----------+ +-----------+ |
5175 | | A | | B | | |
5176 | +-----------+ --> +-----------+ | |
5177 | | B | | A | | |
5178 | +-----------+ +-----------+ | |
4588ec20 | 5179 | |
5f5c8ee5 GM |
5180 | Instead, prefer bigger moves, and invalidate moves that would |
5181 | copy from where we copied to. */ | |
ea0d86af | 5182 | |
5f5c8ee5 GM |
5183 | for (i = 0; i < nruns; ++i) |
5184 | if (runs[i]->nrows > 0) | |
5185 | { | |
5186 | struct run *r = runs[i]; | |
24e86043 | 5187 | |
5f5c8ee5 GM |
5188 | /* Copy on the display. */ |
5189 | if (r->current_y != r->desired_y) | |
5190 | { | |
5191 | rif->scroll_run_hook (w, r); | |
5192 | ||
5193 | /* Invalidate runs that copy from where we copied to. */ | |
5194 | for (j = i + 1; j < nruns; ++j) | |
5195 | { | |
5196 | struct run *p = runs[j]; | |
177c0ea7 | 5197 | |
5f5c8ee5 GM |
5198 | if ((p->current_y >= r->desired_y |
5199 | && p->current_y < r->desired_y + r->height) | |
5200 | || (p->current_y + p->height >= r->desired_y | |
5201 | && (p->current_y + p->height | |
5202 | < r->desired_y + r->height))) | |
5203 | p->nrows = 0; | |
5204 | } | |
5205 | } | |
ea0d86af | 5206 | |
5f5c8ee5 GM |
5207 | /* Assign matrix rows. */ |
5208 | for (j = 0; j < r->nrows; ++j) | |
5209 | { | |
5210 | struct glyph_row *from, *to; | |
408f5064 | 5211 | int to_overlapped_p; |
e876ff42 | 5212 | |
5f5c8ee5 GM |
5213 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
5214 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 5215 | to_overlapped_p = to->overlapped_p; |
6b61353c KH |
5216 | if (!from->mode_line_p && !w->pseudo_window_p |
5217 | && (to->left_fringe_bitmap != from->left_fringe_bitmap | |
5218 | || to->right_fringe_bitmap != from->right_fringe_bitmap | |
5219 | || to->left_fringe_face_id != from->left_fringe_face_id | |
5220 | || to->right_fringe_face_id != from->right_fringe_face_id | |
3d4a365f | 5221 | || to->overlay_arrow_bitmap != from->overlay_arrow_bitmap)) |
6b61353c | 5222 | from->redraw_fringe_bitmaps_p = 1; |
5f5c8ee5 GM |
5223 | assign_row (to, from); |
5224 | to->enabled_p = 1, from->enabled_p = 0; | |
408f5064 | 5225 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
5226 | } |
5227 | } | |
15874c59 | 5228 | |
6df5d75f GM |
5229 | /* Clear the hash table, for the next time. */ |
5230 | for (i = 0; i < row_entry_idx; ++i) | |
5231 | row_table[row_entry_pool[i].bucket] = NULL; | |
5232 | ||
6b61353c KH |
5233 | /* Value is > 0 to indicate that we scrolled the display. */ |
5234 | return nruns; | |
5f5c8ee5 | 5235 | } |
de83c314 | 5236 | |
15874c59 | 5237 | |
4588ec20 | 5238 | \f |
5f5c8ee5 GM |
5239 | /************************************************************************ |
5240 | Frame-Based Updates | |
5241 | ************************************************************************/ | |
4588ec20 | 5242 | |
5f5c8ee5 | 5243 | /* Update the desired frame matrix of frame F. |
4588ec20 | 5244 | |
5f5c8ee5 GM |
5245 | FORCE_P non-zero means that the update should not be stopped by |
5246 | pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling | |
5247 | should not be tried. | |
5248 | ||
5249 | Value is non-zero if update was stopped due to pending input. */ | |
5250 | ||
5251 | static int | |
5252 | update_frame_1 (f, force_p, inhibit_id_p) | |
5253 | struct frame *f; | |
5254 | int force_p; | |
5255 | int inhibit_id_p; | |
4588ec20 | 5256 | { |
5f5c8ee5 GM |
5257 | /* Frame matrices to work on. */ |
5258 | struct glyph_matrix *current_matrix = f->current_matrix; | |
5259 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5260 | int i; | |
4588ec20 JB |
5261 | int pause; |
5262 | int preempt_count = baud_rate / 2400 + 1; | |
dfcf069d | 5263 | extern int input_pending; |
5f5c8ee5 GM |
5264 | |
5265 | xassert (current_matrix && desired_matrix); | |
4588ec20 | 5266 | |
c37e4889 RS |
5267 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
5268 | calculate_costs (f); | |
5269 | ||
d88c2b9e RS |
5270 | if (preempt_count <= 0) |
5271 | preempt_count = 1; | |
5272 | ||
a2130dbb KS |
5273 | #if !PERIODIC_PREEMPTION_CHECKING |
5274 | if (!force_p && detect_input_pending_ignore_squeezables ()) | |
4588ec20 JB |
5275 | { |
5276 | pause = 1; | |
5277 | goto do_pause; | |
5278 | } | |
d012c62b | 5279 | #endif |
4588ec20 | 5280 | |
5f5c8ee5 | 5281 | /* If we cannot insert/delete lines, it's no use trying it. */ |
daf01701 | 5282 | if (!FRAME_LINE_INS_DEL_OK (f)) |
5f5c8ee5 | 5283 | inhibit_id_p = 1; |
7098a0fa | 5284 | |
efb859b4 | 5285 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
5286 | i/d line if just want cursor motion. */ |
5287 | for (i = 0; i < desired_matrix->nrows; i++) | |
5288 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
5289 | break; |
5290 | ||
5291 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
5292 | if (!inhibit_id_p && i < desired_matrix->nrows) |
5293 | force_p |= scrolling (f); | |
4588ec20 JB |
5294 | |
5295 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
5296 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
5297 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 5298 | |
5f5c8ee5 GM |
5299 | /* Now update the rest of the lines. */ |
5300 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 5301 | { |
5f5c8ee5 | 5302 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 5303 | { |
b6a65ac2 | 5304 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
5305 | { |
5306 | /* Flush out every so many lines. | |
5307 | Also flush out if likely to have more than 1k buffered | |
5308 | otherwise. I'm told that some telnet connections get | |
5309 | really screwed by more than 1k output at once. */ | |
fced92f1 CY |
5310 | FILE *display_output = FRAME_TTY (f)->output; |
5311 | if (display_output) | |
4588ec20 | 5312 | { |
fced92f1 CY |
5313 | int outq = PENDING_OUTPUT_COUNT (display_output); |
5314 | if (outq > 900 | |
5315 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
4588ec20 | 5316 | { |
fced92f1 CY |
5317 | fflush (display_output); |
5318 | if (preempt_count == 1) | |
5319 | { | |
a41f8bed | 5320 | #ifdef EMACS_OUTQSIZE |
fced92f1 CY |
5321 | if (EMACS_OUTQSIZE (0, &outq) < 0) |
5322 | /* Probably not a tty. Ignore the error and reset | |
5323 | the outq count. */ | |
5324 | outq = PENDING_OUTPUT_COUNT (FRAME_TTY (f->output)); | |
4588ec20 | 5325 | #endif |
fced92f1 CY |
5326 | outq *= 10; |
5327 | if (baud_rate <= outq && baud_rate > 0) | |
5328 | sleep (outq / baud_rate); | |
5329 | } | |
4588ec20 JB |
5330 | } |
5331 | } | |
4588ec20 JB |
5332 | } |
5333 | ||
d012c62b KS |
5334 | #if PERIODIC_PREEMPTION_CHECKING |
5335 | if (!force_p) | |
5336 | { | |
5337 | EMACS_TIME tm, dif; | |
5338 | EMACS_GET_TIME (tm); | |
5339 | EMACS_SUB_TIME (dif, preemption_next_check, tm); | |
5340 | if (EMACS_TIME_NEG_P (dif)) | |
5341 | { | |
5342 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
5343 | if (detect_input_pending_ignore_squeezables ()) |
5344 | break; | |
d012c62b KS |
5345 | } |
5346 | } | |
5347 | #else | |
5348 | if (!force_p && (i - 1) % preempt_count == 0) | |
a2d5fca0 | 5349 | detect_input_pending_ignore_squeezables (); |
d012c62b | 5350 | #endif |
a2960116 | 5351 | |
5f5c8ee5 | 5352 | update_frame_line (f, i); |
4588ec20 | 5353 | } |
4588ec20 | 5354 | } |
177c0ea7 | 5355 | |
7df02016 | 5356 | pause = (i < FRAME_LINES (f) - 1) ? i : 0; |
4588ec20 JB |
5357 | |
5358 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
5359 | if (!pause) | |
5360 | { | |
48cf7030 | 5361 | if ((cursor_in_echo_area |
5f5c8ee5 | 5362 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 5363 | show the cursor for the message instead of for the |
5f5c8ee5 | 5364 | (now hidden) mini-buffer contents. */ |
2577053b RS |
5365 | || (EQ (minibuf_window, selected_window) |
5366 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 5367 | && !NILP (echo_area_buffer[0]))) |
2577053b | 5368 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 5369 | the active mini-buffer window. */ |
2577053b | 5370 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 5371 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 5372 | { |
7df02016 | 5373 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
5374 | int row, col; |
5375 | ||
5376 | if (cursor_in_echo_area < 0) | |
5377 | { | |
5f5c8ee5 GM |
5378 | /* Negative value of cursor_in_echo_area means put |
5379 | cursor at beginning of line. */ | |
648fa17d JB |
5380 | row = top; |
5381 | col = 0; | |
5382 | } | |
1113d9db | 5383 | else |
648fa17d | 5384 | { |
5f5c8ee5 GM |
5385 | /* Positive value of cursor_in_echo_area means put |
5386 | cursor at the end of the prompt. If the mini-buffer | |
5387 | is several lines high, find the last line that has | |
5388 | any text on it. */ | |
7df02016 | 5389 | row = FRAME_LINES (f); |
177c0ea7 | 5390 | do |
648fa17d | 5391 | { |
5f5c8ee5 GM |
5392 | --row; |
5393 | col = 0; | |
177c0ea7 | 5394 | |
5f5c8ee5 GM |
5395 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
5396 | { | |
5397 | /* Frame rows are filled up with spaces that | |
5398 | must be ignored here. */ | |
5f5c8ee5 GM |
5399 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
5400 | row); | |
5401 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
5402 | struct glyph *last = start + r->used[TEXT_AREA]; | |
5403 | ||
5404 | while (last > start | |
5405 | && (last - 1)->charpos < 0) | |
5406 | --last; | |
177c0ea7 | 5407 | |
5f5c8ee5 GM |
5408 | col = last - start; |
5409 | } | |
648fa17d JB |
5410 | } |
5411 | while (row > top && col == 0); | |
5412 | ||
6395da5c | 5413 | /* Make sure COL is not out of range. */ |
868e640e | 5414 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 5415 | { |
6395da5c | 5416 | /* If we have another row, advance cursor into it. */ |
7df02016 | 5417 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 5418 | { |
7df02016 | 5419 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
5420 | row++; |
5421 | } | |
5422 | /* Otherwise move it back in range. */ | |
5423 | else | |
868e640e | 5424 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
5425 | } |
5426 | } | |
5427 | ||
385ed61f | 5428 | cursor_to (f, row, col); |
1113d9db | 5429 | } |
4588ec20 | 5430 | else |
5f5c8ee5 GM |
5431 | { |
5432 | /* We have only one cursor on terminal frames. Use it to | |
5433 | display the cursor of the selected window. */ | |
5434 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
5435 | if (w->cursor.vpos >= 0 |
5436 | /* The cursor vpos may be temporarily out of bounds | |
5437 | in the following situation: There is one window, | |
5438 | with the cursor in the lower half of it. The window | |
5439 | is split, and a message causes a redisplay before | |
5440 | a new cursor position has been computed. */ | |
7df02016 | 5441 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
5442 | { |
5443 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
5444 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
5445 | ||
7df02016 KS |
5446 | if (INTEGERP (w->left_margin_cols)) |
5447 | x += XFASTINT (w->left_margin_cols); | |
177c0ea7 | 5448 | |
7df02016 | 5449 | /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */ |
385ed61f | 5450 | cursor_to (f, y, x); |
5f5c8ee5 GM |
5451 | } |
5452 | } | |
4588ec20 JB |
5453 | } |
5454 | ||
4588ec20 JB |
5455 | do_pause: |
5456 | ||
5f5c8ee5 | 5457 | clear_desired_matrices (f); |
4588ec20 JB |
5458 | return pause; |
5459 | } | |
5460 | ||
4588ec20 | 5461 | |
5f5c8ee5 | 5462 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 5463 | |
dfcf069d | 5464 | int |
502b9b64 | 5465 | scrolling (frame) |
5f5c8ee5 | 5466 | struct frame *frame; |
4588ec20 JB |
5467 | { |
5468 | int unchanged_at_top, unchanged_at_bottom; | |
5469 | int window_size; | |
5470 | int changed_lines; | |
7df02016 KS |
5471 | int *old_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); |
5472 | int *new_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
5473 | int *draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
5474 | int *old_draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 5475 | register int i; |
7df02016 | 5476 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
5477 | struct glyph_matrix *current_matrix = frame->current_matrix; |
5478 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 5479 | |
5f5c8ee5 GM |
5480 | if (!current_matrix) |
5481 | abort (); | |
4588ec20 | 5482 | |
5f5c8ee5 GM |
5483 | /* Compute hash codes of all the lines. Also calculate number of |
5484 | changed lines, number of unchanged lines at the beginning, and | |
5485 | number of unchanged lines at the end. */ | |
4588ec20 JB |
5486 | changed_lines = 0; |
5487 | unchanged_at_top = 0; | |
7df02016 KS |
5488 | unchanged_at_bottom = FRAME_LINES (frame); |
5489 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
5490 | { |
5491 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 5492 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 5493 | return 0; |
5f5c8ee5 GM |
5494 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
5495 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
5496 | { |
5497 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
5498 | new_hash[i] = old_hash[i]; | |
5499 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
5500 | draw_cost[i] = INFINITY; | |
5501 | } | |
4588ec20 | 5502 | else |
f188b3c4 | 5503 | { |
5f5c8ee5 GM |
5504 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
5505 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 5506 | } |
4588ec20 JB |
5507 | |
5508 | if (old_hash[i] != new_hash[i]) | |
5509 | { | |
5510 | changed_lines++; | |
7df02016 | 5511 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
5512 | } |
5513 | else if (i == unchanged_at_top) | |
5514 | unchanged_at_top++; | |
5f5c8ee5 | 5515 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
5516 | } |
5517 | ||
5518 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
daf01701 | 5519 | if ((!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 5520 | && changed_lines < baud_rate / 2400) |
7df02016 | 5521 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
5522 | return 1; |
5523 | ||
7df02016 | 5524 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
5525 | - unchanged_at_bottom); |
5526 | ||
daf01701 | 5527 | if (FRAME_SCROLL_REGION_OK (frame)) |
4588ec20 | 5528 | free_at_end_vpos -= unchanged_at_bottom; |
daf01701 | 5529 | else if (FRAME_MEMORY_BELOW_FRAME (frame)) |
4588ec20 JB |
5530 | free_at_end_vpos = -1; |
5531 | ||
5532 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 5533 | current frame and desired frame, don't bother with i/d calc. */ |
daf01701 | 5534 | if (!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 5535 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
5536 | && (window_size >= |
5537 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 5538 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
5539 | old_hash, new_hash, draw_cost))) |
5540 | return 0; | |
5541 | ||
5f5c8ee5 GM |
5542 | if (window_size < 2) |
5543 | return 0; | |
5544 | ||
502b9b64 | 5545 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 5546 | draw_cost + unchanged_at_top - 1, |
190bb91a | 5547 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
5548 | old_hash + unchanged_at_top - 1, |
5549 | new_hash + unchanged_at_top - 1, | |
5550 | free_at_end_vpos - unchanged_at_top); | |
5551 | ||
5552 | return 0; | |
5553 | } | |
4588ec20 | 5554 | |
4588ec20 | 5555 | |
5f5c8ee5 GM |
5556 | /* Count the number of blanks at the start of the vector of glyphs R |
5557 | which is LEN glyphs long. */ | |
4588ec20 | 5558 | |
4588ec20 | 5559 | static int |
5f5c8ee5 GM |
5560 | count_blanks (r, len) |
5561 | struct glyph *r; | |
5562 | int len; | |
4588ec20 | 5563 | { |
5f5c8ee5 | 5564 | int i; |
177c0ea7 | 5565 | |
5f5c8ee5 GM |
5566 | for (i = 0; i < len; ++i) |
5567 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
5568 | break; | |
5569 | ||
5570 | return i; | |
4588ec20 JB |
5571 | } |
5572 | ||
5f5c8ee5 GM |
5573 | |
5574 | /* Count the number of glyphs in common at the start of the glyph | |
5575 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
5576 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
5577 | ||
4588ec20 | 5578 | static int |
5f5c8ee5 GM |
5579 | count_match (str1, end1, str2, end2) |
5580 | struct glyph *str1, *end1, *str2, *end2; | |
4588ec20 | 5581 | { |
5f5c8ee5 GM |
5582 | struct glyph *p1 = str1; |
5583 | struct glyph *p2 = str2; | |
177c0ea7 | 5584 | |
5f5c8ee5 GM |
5585 | while (p1 < end1 |
5586 | && p2 < end2 | |
42186983 | 5587 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 5588 | ++p1, ++p2; |
177c0ea7 | 5589 | |
5f5c8ee5 | 5590 | return p1 - str1; |
4588ec20 JB |
5591 | } |
5592 | ||
5f5c8ee5 | 5593 | |
4588ec20 | 5594 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 5595 | |
5f5c8ee5 | 5596 | extern int *char_ins_del_vector; |
7df02016 | 5597 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))]) |
4588ec20 | 5598 | |
5f5c8ee5 GM |
5599 | |
5600 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
5601 | ||
4588ec20 | 5602 | static void |
c363a1d6 GM |
5603 | update_frame_line (f, vpos) |
5604 | struct frame *f; | |
4588ec20 JB |
5605 | int vpos; |
5606 | { | |
5f5c8ee5 | 5607 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
5608 | int tem; |
5609 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
5610 | struct glyph_matrix *current_matrix = f->current_matrix; |
5611 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
5612 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
5613 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
5614 | int must_write_whole_line_p; | |
daf01701 | 5615 | int write_spaces_p = FRAME_MUST_WRITE_SPACES (f); |
c363a1d6 | 5616 | int colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background |
0a894bad GM |
5617 | != FACE_TTY_DEFAULT_BG_COLOR); |
5618 | ||
5619 | if (colored_spaces_p) | |
5620 | write_spaces_p = 1; | |
5f5c8ee5 | 5621 | |
26c63686 GM |
5622 | /* Current row not enabled means it has unknown contents. We must |
5623 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
5624 | must_write_whole_line_p = !current_row->enabled_p; |
5625 | if (must_write_whole_line_p) | |
4588ec20 | 5626 | { |
5f5c8ee5 | 5627 | obody = 0; |
4588ec20 JB |
5628 | olen = 0; |
5629 | } | |
5630 | else | |
5631 | { | |
5f5c8ee5 GM |
5632 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
5633 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 5634 | |
4cecaab8 MB |
5635 | /* Ignore trailing spaces, if we can. */ |
5636 | if (!write_spaces_p) | |
5637 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
5638 | olen--; | |
4588ec20 JB |
5639 | } |
5640 | ||
5f5c8ee5 GM |
5641 | current_row->enabled_p = 1; |
5642 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 5643 | |
5f5c8ee5 GM |
5644 | /* If desired line is empty, just clear the line. */ |
5645 | if (!desired_row->enabled_p) | |
4588ec20 JB |
5646 | { |
5647 | nlen = 0; | |
5648 | goto just_erase; | |
5649 | } | |
5650 | ||
5f5c8ee5 GM |
5651 | nbody = desired_row->glyphs[TEXT_AREA]; |
5652 | nlen = desired_row->used[TEXT_AREA]; | |
5653 | nend = nbody + nlen; | |
5654 | ||
5655 | /* If display line has unknown contents, write the whole line. */ | |
5656 | if (must_write_whole_line_p) | |
5657 | { | |
26c63686 | 5658 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 5659 | if (!write_spaces_p) |
74ca462f GM |
5660 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
5661 | --nlen; | |
5662 | ||
26c63686 | 5663 | /* Write the contents of the desired line. */ |
74ca462f | 5664 | if (nlen) |
26c63686 | 5665 | { |
385ed61f KL |
5666 | cursor_to (f, vpos, 0); |
5667 | write_glyphs (f, nbody, nlen); | |
26c63686 | 5668 | } |
177c0ea7 | 5669 | |
26c63686 GM |
5670 | /* Don't call clear_end_of_line if we already wrote the whole |
5671 | line. The cursor will not be at the right margin in that | |
5672 | case but in the line below. */ | |
7df02016 | 5673 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 | 5674 | { |
385ed61f KL |
5675 | cursor_to (f, vpos, nlen); |
5676 | clear_end_of_line (f, FRAME_TOTAL_COLS (f)); | |
26c63686 | 5677 | } |
58827478 GM |
5678 | else |
5679 | /* Make sure we are in the right row, otherwise cursor movement | |
5680 | with cmgoto might use `ch' in the wrong row. */ | |
385ed61f | 5681 | cursor_to (f, vpos, 0); |
177c0ea7 | 5682 | |
5f5c8ee5 GM |
5683 | make_current (desired_matrix, current_matrix, vpos); |
5684 | return; | |
5685 | } | |
4588ec20 JB |
5686 | |
5687 | /* Pretend trailing spaces are not there at all, | |
5688 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
5689 | if (!write_spaces_p) |
5690 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
5691 | nlen--; | |
4588ec20 JB |
5692 | |
5693 | /* If there's no i/d char, quickly do the best we can without it. */ | |
daf01701 | 5694 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
4588ec20 | 5695 | { |
5f5c8ee5 | 5696 | int i, j; |
4588ec20 | 5697 | |
5f5c8ee5 GM |
5698 | /* Find the first glyph in desired row that doesn't agree with |
5699 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
5700 | for (i = 0; i < nlen; i++) |
5701 | { | |
5f5c8ee5 | 5702 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 5703 | { |
5f5c8ee5 GM |
5704 | /* Find the end of the run of different glyphs. */ |
5705 | j = i + 1; | |
5706 | while (j < nlen | |
5707 | && (j >= olen | |
5708 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
5709 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
5710 | ++j; | |
177c0ea7 JB |
5711 | |
5712 | /* Output this run of non-matching chars. */ | |
385ed61f KL |
5713 | cursor_to (f, vpos, i); |
5714 | write_glyphs (f, nbody + i, j - i); | |
5f5c8ee5 | 5715 | i = j - 1; |
4588ec20 JB |
5716 | |
5717 | /* Now find the next non-match. */ | |
5718 | } | |
5719 | } | |
5720 | ||
5721 | /* Clear the rest of the line, or the non-clear part of it. */ | |
5722 | if (olen > nlen) | |
5723 | { | |
385ed61f KL |
5724 | cursor_to (f, vpos, nlen); |
5725 | clear_end_of_line (f, olen); | |
4588ec20 JB |
5726 | } |
5727 | ||
5f5c8ee5 GM |
5728 | /* Make current row = desired row. */ |
5729 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
5730 | return; |
5731 | } | |
5732 | ||
5f5c8ee5 GM |
5733 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
5734 | characters in a row. */ | |
5735 | ||
4588ec20 JB |
5736 | if (!olen) |
5737 | { | |
5f5c8ee5 GM |
5738 | /* If current line is blank, skip over initial spaces, if |
5739 | possible, and write the rest. */ | |
4cecaab8 | 5740 | if (write_spaces_p) |
5f5c8ee5 GM |
5741 | nsp = 0; |
5742 | else | |
5743 | nsp = count_blanks (nbody, nlen); | |
5744 | ||
4588ec20 JB |
5745 | if (nlen > nsp) |
5746 | { | |
385ed61f KL |
5747 | cursor_to (f, vpos, nsp); |
5748 | write_glyphs (f, nbody + nsp, nlen - nsp); | |
4588ec20 JB |
5749 | } |
5750 | ||
502b9b64 | 5751 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 5752 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
5753 | return; |
5754 | } | |
5755 | ||
4588ec20 | 5756 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 5757 | osp = count_blanks (obody, olen); |
4cecaab8 | 5758 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 5759 | |
5f5c8ee5 GM |
5760 | /* Compute number of matching chars starting with first non-blank. */ |
5761 | begmatch = count_match (obody + osp, obody + olen, | |
5762 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
5763 | |
5764 | /* Spaces in new match implicit space past the end of old. */ | |
5765 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 5766 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
5767 | { |
5768 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
5769 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
5770 | ++begmatch; | |
4588ec20 JB |
5771 | } |
5772 | ||
5773 | /* Avoid doing insert/delete char | |
5774 | just cause number of leading spaces differs | |
5f5c8ee5 | 5775 | when the following text does not match. */ |
4588ec20 JB |
5776 | if (begmatch == 0 && osp != nsp) |
5777 | osp = nsp = min (osp, nsp); | |
5778 | ||
5779 | /* Find matching characters at end of line */ | |
5780 | op1 = obody + olen; | |
5781 | np1 = nbody + nlen; | |
5782 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
5783 | while (op1 > op2 |
5784 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
5785 | { |
5786 | op1--; | |
5787 | np1--; | |
5788 | } | |
5789 | endmatch = obody + olen - op1; | |
5790 | ||
4588ec20 JB |
5791 | /* tem gets the distance to insert or delete. |
5792 | endmatch is how many characters we save by doing so. | |
5793 | Is it worth it? */ | |
5794 | ||
5795 | tem = (nlen - nsp) - (olen - osp); | |
5796 | if (endmatch && tem | |
daf01701 | 5797 | && (!FRAME_CHAR_INS_DEL_OK (f) |
8a56675d | 5798 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
5799 | endmatch = 0; |
5800 | ||
5801 | /* nsp - osp is the distance to insert or delete. | |
5802 | If that is nonzero, begmatch is known to be nonzero also. | |
5803 | begmatch + endmatch is how much we save by doing the ins/del. | |
5804 | Is it worth it? */ | |
5805 | ||
5806 | if (nsp != osp | |
daf01701 | 5807 | && (!FRAME_CHAR_INS_DEL_OK (f) |
c363a1d6 | 5808 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
5809 | { |
5810 | begmatch = 0; | |
5811 | endmatch = 0; | |
5812 | osp = nsp = min (osp, nsp); | |
5813 | } | |
5814 | ||
5815 | /* Now go through the line, inserting, writing and | |
5816 | deleting as appropriate. */ | |
5817 | ||
5818 | if (osp > nsp) | |
5819 | { | |
385ed61f KL |
5820 | cursor_to (f, vpos, nsp); |
5821 | delete_glyphs (f, osp - nsp); | |
4588ec20 JB |
5822 | } |
5823 | else if (nsp > osp) | |
5824 | { | |
5825 | /* If going to delete chars later in line | |
5826 | and insert earlier in the line, | |
5827 | must delete first to avoid losing data in the insert */ | |
5828 | if (endmatch && nlen < olen + nsp - osp) | |
5829 | { | |
385ed61f KL |
5830 | cursor_to (f, vpos, nlen - endmatch + osp - nsp); |
5831 | delete_glyphs (f, olen + nsp - osp - nlen); | |
4588ec20 JB |
5832 | olen = nlen - (nsp - osp); |
5833 | } | |
385ed61f KL |
5834 | cursor_to (f, vpos, osp); |
5835 | insert_glyphs (f, 0, nsp - osp); | |
4588ec20 JB |
5836 | } |
5837 | olen += nsp - osp; | |
5838 | ||
5839 | tem = nsp + begmatch + endmatch; | |
5840 | if (nlen != tem || olen != tem) | |
5841 | { | |
4588ec20 JB |
5842 | if (!endmatch || nlen == olen) |
5843 | { | |
c363a1d6 GM |
5844 | /* If new text being written reaches right margin, there is |
5845 | no need to do clear-to-eol at the end of this function | |
5846 | (and it would not be safe, since cursor is not going to | |
5847 | be "at the margin" after the text is done). */ | |
7df02016 | 5848 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 5849 | olen = 0; |
c363a1d6 GM |
5850 | |
5851 | /* Function write_glyphs is prepared to do nothing | |
5852 | if passed a length <= 0. Check it here to avoid | |
5853 | unnecessary cursor movement. */ | |
5854 | if (nlen - tem > 0) | |
5855 | { | |
385ed61f KL |
5856 | cursor_to (f, vpos, nsp + begmatch); |
5857 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
c363a1d6 | 5858 | } |
4588ec20 JB |
5859 | } |
5860 | else if (nlen > olen) | |
5861 | { | |
24e86043 KH |
5862 | /* Here, we used to have the following simple code: |
5863 | ---------------------------------------- | |
5864 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
5865 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
5866 | ---------------------------------------- | |
5867 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
5868 | is a padding glyph. */ | |
5869 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
5870 | int del; | |
5f5c8ee5 | 5871 | |
385ed61f | 5872 | cursor_to (f, vpos, nsp + begmatch); |
177c0ea7 | 5873 | |
5f5c8ee5 | 5874 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
5875 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
5876 | out--; | |
385ed61f | 5877 | write_glyphs (f, nbody + nsp + begmatch, out); |
177c0ea7 | 5878 | |
5f5c8ee5 GM |
5879 | /* If we left columns to be overwritten, we must delete them. */ |
5880 | del = olen - tem - out; | |
c363a1d6 | 5881 | if (del > 0) |
385ed61f | 5882 | delete_glyphs (f, del); |
177c0ea7 | 5883 | |
5f5c8ee5 | 5884 | /* At last, we insert columns not yet written out. */ |
385ed61f | 5885 | insert_glyphs (f, nbody + nsp + begmatch + out, nlen - olen + del); |
5f5c8ee5 GM |
5886 | olen = nlen; |
5887 | } | |
5888 | else if (olen > nlen) | |
5889 | { | |
385ed61f KL |
5890 | cursor_to (f, vpos, nsp + begmatch); |
5891 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
5892 | delete_glyphs (f, olen - nlen); | |
5f5c8ee5 GM |
5893 | olen = nlen; |
5894 | } | |
bd9e3e75 | 5895 | } |
5f5c8ee5 GM |
5896 | |
5897 | just_erase: | |
5898 | /* If any unerased characters remain after the new line, erase them. */ | |
5899 | if (olen > nlen) | |
078b3696 | 5900 | { |
385ed61f KL |
5901 | cursor_to (f, vpos, nlen); |
5902 | clear_end_of_line (f, olen); | |
078b3696 | 5903 | } |
5f5c8ee5 GM |
5904 | |
5905 | /* Exchange contents between current_frame and new_frame. */ | |
5906 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5907 | } |
5f5c8ee5 GM |
5908 | |
5909 | ||
078b3696 | 5910 | \f |
5f5c8ee5 GM |
5911 | /*********************************************************************** |
5912 | X/Y Position -> Buffer Position | |
5913 | ***********************************************************************/ | |
5914 | ||
a1b0a6db | 5915 | /* Determine what's under window-relative pixel position (*X, *Y). |
6b61353c KH |
5916 | Return the object (string or buffer) that's there. |
5917 | Return in *POS the position in that object. | |
5918 | Adjust *X and *Y to character positions. */ | |
5f5c8ee5 | 5919 | |
6b61353c KH |
5920 | Lisp_Object |
5921 | buffer_posn_from_coords (w, x, y, pos, object, dx, dy, width, height) | |
5f5c8ee5 GM |
5922 | struct window *w; |
5923 | int *x, *y; | |
a1b0a6db | 5924 | struct display_pos *pos; |
6b61353c KH |
5925 | Lisp_Object *object; |
5926 | int *dx, *dy; | |
5927 | int *width, *height; | |
4588ec20 | 5928 | { |
5f5c8ee5 GM |
5929 | struct it it; |
5930 | struct buffer *old_current_buffer = current_buffer; | |
5931 | struct text_pos startp; | |
6b61353c KH |
5932 | Lisp_Object string; |
5933 | struct glyph_row *row; | |
cedd7cd9 KS |
5934 | #ifdef HAVE_WINDOW_SYSTEM |
5935 | struct image *img = 0; | |
5936 | #endif | |
6b61353c | 5937 | int x0, x1; |
5f5c8ee5 GM |
5938 | |
5939 | current_buffer = XBUFFER (w->buffer); | |
5940 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
5941 | CHARPOS (startp) = min (ZV, max (BEGV, CHARPOS (startp))); | |
5942 | BYTEPOS (startp) = min (ZV_BYTE, max (BEGV_BYTE, BYTEPOS (startp))); | |
5943 | start_display (&it, w, startp); | |
177c0ea7 | 5944 | |
6b61353c KH |
5945 | x0 = *x - WINDOW_LEFT_MARGIN_WIDTH (w); |
5946 | move_it_to (&it, -1, x0 + it.first_visible_x, *y, -1, | |
5f5c8ee5 | 5947 | MOVE_TO_X | MOVE_TO_Y); |
177c0ea7 | 5948 | |
5f5c8ee5 | 5949 | current_buffer = old_current_buffer; |
a1b0a6db | 5950 | |
6b61353c KH |
5951 | *dx = x0 + it.first_visible_x - it.current_x; |
5952 | *dy = *y - it.current_y; | |
5953 | ||
5954 | string = w->buffer; | |
5955 | if (STRINGP (it.string)) | |
5956 | string = it.string; | |
a1b0a6db | 5957 | *pos = it.current; |
6b61353c KH |
5958 | |
5959 | #ifdef HAVE_WINDOW_SYSTEM | |
5960 | if (it.what == IT_IMAGE) | |
5961 | { | |
6b61353c KH |
5962 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5963 | && !NILP (img->spec)) | |
5964 | *object = img->spec; | |
5965 | } | |
5966 | #endif | |
5967 | ||
b70d98e1 KS |
5968 | if (it.vpos < w->current_matrix->nrows |
5969 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5970 | row->enabled_p)) | |
6b61353c KH |
5971 | { |
5972 | if (it.hpos < row->used[TEXT_AREA]) | |
5973 | { | |
5974 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6b61353c | 5975 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5976 | if (img) |
5977 | { | |
5978 | *dy -= row->ascent - glyph->ascent; | |
5979 | *dx += glyph->slice.x; | |
5980 | *dy += glyph->slice.y; | |
5981 | /* Image slices positions are still relative to the entire image */ | |
5982 | *width = img->width; | |
5983 | *height = img->height; | |
5984 | } | |
5985 | else | |
6b61353c | 5986 | #endif |
cedd7cd9 KS |
5987 | { |
5988 | *width = glyph->pixel_width; | |
5989 | *height = glyph->ascent + glyph->descent; | |
5990 | } | |
6b61353c KH |
5991 | } |
5992 | else | |
5993 | { | |
5994 | *width = 0; | |
5995 | *height = row->height; | |
5996 | } | |
5997 | } | |
5998 | else | |
5999 | { | |
6000 | *width = *height = 0; | |
6001 | } | |
6002 | ||
6003 | /* Add extra (default width) columns if clicked after EOL. */ | |
6004 | x1 = max(0, it.current_x + it.pixel_width - it.first_visible_x); | |
6005 | if (x0 > x1) | |
6006 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
6007 | ||
6008 | *x = it.hpos; | |
6009 | *y = it.vpos; | |
6010 | ||
6011 | return string; | |
5f5c8ee5 | 6012 | } |
4588ec20 | 6013 | |
5f5c8ee5 GM |
6014 | |
6015 | /* Value is the string under window-relative coordinates X/Y in the | |
6b61353c KH |
6016 | mode line or header line (PART says which) of window W, or nil if none. |
6017 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
6018 | |
6019 | Lisp_Object | |
6b61353c | 6020 | mode_line_string (w, part, x, y, charpos, object, dx, dy, width, height) |
5f5c8ee5 | 6021 | struct window *w; |
641bdbf3 | 6022 | enum window_part part; |
6b61353c | 6023 | int *x, *y; |
5f5c8ee5 | 6024 | int *charpos; |
6b61353c KH |
6025 | Lisp_Object *object; |
6026 | int *dx, *dy; | |
6027 | int *width, *height; | |
5f5c8ee5 GM |
6028 | { |
6029 | struct glyph_row *row; | |
6030 | struct glyph *glyph, *end; | |
6b61353c | 6031 | int x0, y0; |
5f5c8ee5 GM |
6032 | Lisp_Object string = Qnil; |
6033 | ||
641bdbf3 | 6034 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
6035 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
6036 | else | |
045dee35 | 6037 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
6b61353c KH |
6038 | y0 = *y - row->y; |
6039 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
5f5c8ee5 GM |
6040 | |
6041 | if (row->mode_line_p && row->enabled_p) | |
4588ec20 | 6042 | { |
5f5c8ee5 GM |
6043 | /* Find the glyph under X. If we find one with a string object, |
6044 | it's the one we were looking for. */ | |
6045 | glyph = row->glyphs[TEXT_AREA]; | |
6046 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 6047 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
6048 | x0 -= glyph->pixel_width; |
6049 | *x = glyph - row->glyphs[TEXT_AREA]; | |
6050 | if (glyph < end) | |
6051 | { | |
6052 | string = glyph->object; | |
6053 | *charpos = glyph->charpos; | |
6054 | *width = glyph->pixel_width; | |
6055 | *height = glyph->ascent + glyph->descent; | |
6056 | #ifdef HAVE_WINDOW_SYSTEM | |
6057 | if (glyph->type == IMAGE_GLYPH) | |
6058 | { | |
6059 | struct image *img; | |
6060 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
6061 | if (img != NULL) | |
6062 | *object = img->spec; | |
6063 | y0 -= row->ascent - glyph->ascent; | |
6064 | } | |
6065 | #endif | |
6066 | } | |
6067 | else | |
6068 | { | |
6069 | /* Add extra (default width) columns if clicked after EOL. */ | |
6070 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
6071 | *width = 0; | |
6072 | *height = row->height; | |
6073 | } | |
6074 | } | |
6075 | else | |
6076 | { | |
6077 | *x = 0; | |
6078 | x0 = 0; | |
6079 | *width = *height = 0; | |
4588ec20 | 6080 | } |
5f5c8ee5 | 6081 | |
6b61353c KH |
6082 | *dx = x0; |
6083 | *dy = y0; | |
6084 | ||
5f5c8ee5 | 6085 | return string; |
4588ec20 | 6086 | } |
5f5c8ee5 GM |
6087 | |
6088 | ||
db1db309 GM |
6089 | /* Value is the string under window-relative coordinates X/Y in either |
6090 | marginal area, or nil if none. *CHARPOS is set to the position in | |
6091 | the string returned. */ | |
6092 | ||
6093 | Lisp_Object | |
6b61353c | 6094 | marginal_area_string (w, part, x, y, charpos, object, dx, dy, width, height) |
db1db309 | 6095 | struct window *w; |
641bdbf3 | 6096 | enum window_part part; |
6b61353c | 6097 | int *x, *y; |
521069b9 | 6098 | int *charpos; |
6b61353c KH |
6099 | Lisp_Object *object; |
6100 | int *dx, *dy; | |
6101 | int *width, *height; | |
db1db309 GM |
6102 | { |
6103 | struct glyph_row *row = w->current_matrix->rows; | |
6104 | struct glyph *glyph, *end; | |
6b61353c | 6105 | int x0, y0, i, wy = *y; |
641bdbf3 | 6106 | int area; |
db1db309 GM |
6107 | Lisp_Object string = Qnil; |
6108 | ||
641bdbf3 | 6109 | if (part == ON_LEFT_MARGIN) |
db1db309 | 6110 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 6111 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
6112 | area = RIGHT_MARGIN_AREA; |
6113 | else | |
6114 | abort (); | |
6115 | ||
6116 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
6117 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
6118 | break; | |
6b61353c KH |
6119 | y0 = *y - row->y; |
6120 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
db1db309 GM |
6121 | |
6122 | if (row->enabled_p) | |
6123 | { | |
6124 | /* Find the glyph under X. If we find one with a string object, | |
6125 | it's the one we were looking for. */ | |
db1db309 | 6126 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 6127 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 6128 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
6129 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) |
6130 | + window_box_width (w, LEFT_MARGIN_AREA) | |
6131 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 6132 | else |
7df02016 | 6133 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 6134 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
6135 | : 0); |
6136 | ||
6b61353c KH |
6137 | glyph = row->glyphs[area]; |
6138 | end = glyph + row->used[area]; | |
cfde341f | 6139 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
6140 | x0 -= glyph->pixel_width; |
6141 | *x = glyph - row->glyphs[area]; | |
6142 | if (glyph < end) | |
6143 | { | |
6144 | string = glyph->object; | |
6145 | *charpos = glyph->charpos; | |
6146 | *width = glyph->pixel_width; | |
6147 | *height = glyph->ascent + glyph->descent; | |
6148 | #ifdef HAVE_WINDOW_SYSTEM | |
6149 | if (glyph->type == IMAGE_GLYPH) | |
6150 | { | |
6151 | struct image *img; | |
6152 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
6153 | if (img != NULL) | |
6154 | *object = img->spec; | |
6155 | y0 -= row->ascent - glyph->ascent; | |
cedd7cd9 KS |
6156 | x0 += glyph->slice.x; |
6157 | y0 += glyph->slice.y; | |
6b61353c KH |
6158 | } |
6159 | #endif | |
6160 | } | |
6161 | else | |
6162 | { | |
6163 | /* Add extra (default width) columns if clicked after EOL. */ | |
6164 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
6165 | *width = 0; | |
6166 | *height = row->height; | |
6167 | } | |
db1db309 | 6168 | } |
6b61353c KH |
6169 | else |
6170 | { | |
6171 | x0 = 0; | |
6172 | *x = 0; | |
6173 | *width = *height = 0; | |
6174 | } | |
6175 | ||
6176 | *dx = x0; | |
6177 | *dy = y0; | |
db1db309 GM |
6178 | |
6179 | return string; | |
6180 | } | |
6181 | ||
6182 | ||
5f5c8ee5 GM |
6183 | /*********************************************************************** |
6184 | Changing Frame Sizes | |
6185 | ***********************************************************************/ | |
4588ec20 JB |
6186 | |
6187 | #ifdef SIGWINCH | |
5f5c8ee5 | 6188 | |
efb859b4 | 6189 | SIGTYPE |
61cbef47 | 6190 | window_change_signal (signalnum) /* If we don't have an argument, */ |
5f5c8ee5 | 6191 | int signalnum; /* some compilers complain in signal calls. */ |
4588ec20 JB |
6192 | { |
6193 | int width, height; | |
d43721a2 | 6194 | #ifndef USE_CRT_DLL |
4588ec20 | 6195 | extern int errno; |
d43721a2 | 6196 | #endif |
4588ec20 JB |
6197 | int old_errno = errno; |
6198 | ||
28d7d09f | 6199 | struct tty_display_info *tty; |
4d553a13 | 6200 | |
333f1b6f JD |
6201 | signal (SIGWINCH, window_change_signal); |
6202 | SIGNAL_THREAD_CHECK (signalnum); | |
6203 | ||
9628b887 KL |
6204 | /* The frame size change obviously applies to a single |
6205 | termcap-controlled terminal, but we can't decide which. | |
6206 | Therefore, we resize the frames corresponding to each tty. | |
9628b887 KL |
6207 | */ |
6208 | for (tty = tty_list; tty; tty = tty->next) { | |
4588ec20 | 6209 | |
0a125897 KL |
6210 | if (! tty->term_initted) |
6211 | continue; | |
4588ec20 | 6212 | |
0b0d3e0b | 6213 | get_tty_size (fileno (tty->input), &width, &height); |
3fc809e2 | 6214 | |
bedeffcf | 6215 | if (width > 5 && height > 2) { |
9628b887 | 6216 | Lisp_Object tail, frame; |
3fc809e2 | 6217 | |
9628b887 | 6218 | FOR_EACH_FRAME (tail, frame) |
4d553a13 KL |
6219 | if (FRAME_TERMCAP_P (XFRAME (frame)) && FRAME_TTY (XFRAME (frame)) == tty) |
6220 | /* Record the new sizes, but don't reallocate the data | |
6221 | structures now. Let that be done later outside of the | |
6222 | signal handler. */ | |
6223 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); | |
9628b887 | 6224 | } |
4588ec20 | 6225 | } |
3fc809e2 | 6226 | |
4588ec20 JB |
6227 | errno = old_errno; |
6228 | } | |
6229 | #endif /* SIGWINCH */ | |
6230 | ||
6231 | ||
b96fd3e8 GM |
6232 | /* Do any change in frame size that was requested by a signal. SAFE |
6233 | non-zero means this function is called from a place where it is | |
6234 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 6235 | |
dfcf069d | 6236 | void |
b96fd3e8 GM |
6237 | do_pending_window_change (safe) |
6238 | int safe; | |
4588ec20 JB |
6239 | { |
6240 | /* If window_change_signal should have run before, run it now. */ | |
b96fd3e8 GM |
6241 | if (redisplaying_p && !safe) |
6242 | return; | |
177c0ea7 | 6243 | |
4588ec20 JB |
6244 | while (delayed_size_change) |
6245 | { | |
35f56f96 | 6246 | Lisp_Object tail, frame; |
4588ec20 JB |
6247 | |
6248 | delayed_size_change = 0; | |
6249 | ||
35f56f96 | 6250 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 6251 | { |
5f5c8ee5 | 6252 | struct frame *f = XFRAME (frame); |
35f56f96 | 6253 | |
7df02016 KS |
6254 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
6255 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
6256 | 0, 0, safe); | |
4588ec20 JB |
6257 | } |
6258 | } | |
6259 | } | |
6260 | ||
6261 | ||
502b9b64 | 6262 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 6263 | indicate no change is to take place. |
4588ec20 | 6264 | |
b6a65ac2 JB |
6265 | If DELAY is non-zero, then assume we're being called from a signal |
6266 | handler, and queue the change for later - perhaps the next | |
6267 | redisplay. Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
6268 | from a signal handler. |
6269 | ||
6270 | SAFE non-zero means this function is called from a place where it's | |
6271 | safe to change frame sizes while a redisplay is in progress. */ | |
b6a65ac2 | 6272 | |
dfcf069d | 6273 | void |
b96fd3e8 | 6274 | change_frame_size (f, newheight, newwidth, pretend, delay, safe) |
5f5c8ee5 | 6275 | register struct frame *f; |
b96fd3e8 | 6276 | int newheight, newwidth, pretend, delay, safe; |
45140e01 RS |
6277 | { |
6278 | Lisp_Object tail, frame; | |
3826ea1a | 6279 | |
9628b887 | 6280 | if (FRAME_MSDOS_P (f)) |
45140e01 | 6281 | { |
9628b887 KL |
6282 | /* On MS-DOS, all frames use the same screen, so a change in |
6283 | size affects all frames. Termcap now supports multiple | |
6284 | ttys. */ | |
45140e01 | 6285 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 6286 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 6287 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 6288 | pretend, delay, safe); |
45140e01 RS |
6289 | } |
6290 | else | |
b96fd3e8 | 6291 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
6292 | } |
6293 | ||
6294 | static void | |
b96fd3e8 | 6295 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe) |
5f5c8ee5 | 6296 | register struct frame *f; |
b96fd3e8 | 6297 | int newheight, newwidth, pretend, delay, safe; |
4588ec20 | 6298 | { |
7df02016 | 6299 | int new_frame_total_cols; |
aed13378 | 6300 | int count = SPECPDL_INDEX (); |
3826ea1a | 6301 | |
4588ec20 | 6302 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 6303 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 6304 | { |
7df02016 KS |
6305 | f->new_text_lines = newheight; |
6306 | f->new_text_cols = newwidth; | |
4588ec20 JB |
6307 | delayed_size_change = 1; |
6308 | return; | |
6309 | } | |
6310 | ||
502b9b64 | 6311 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
6312 | f->new_text_lines = 0; |
6313 | f->new_text_cols = 0; | |
b6a65ac2 | 6314 | |
08f7aa3e | 6315 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 6316 | if (newheight == 0) |
7df02016 | 6317 | newheight = FRAME_LINES (f); |
ae19c6f2 | 6318 | if (newwidth == 0) |
7df02016 | 6319 | newwidth = FRAME_COLS (f); |
3826ea1a | 6320 | |
5f5c8ee5 GM |
6321 | /* Compute width of windows in F. |
6322 | This is the width of the frame without vertical scroll bars. */ | |
7df02016 | 6323 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); |
3826ea1a | 6324 | |
b6a65ac2 | 6325 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 6326 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 JB |
6327 | |
6328 | /* If we're not changing the frame size, quit now. */ | |
7df02016 KS |
6329 | if (newheight == FRAME_LINES (f) |
6330 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) | |
4588ec20 JB |
6331 | return; |
6332 | ||
cbb95688 RS |
6333 | BLOCK_INPUT; |
6334 | ||
886a8a6c KH |
6335 | #ifdef MSDOS |
6336 | /* We only can set screen dimensions to certain values supported | |
6337 | by our video hardware. Try to find the smallest size greater | |
6338 | or equal to the requested dimensions. */ | |
6339 | dos_set_window_size (&newheight, &newwidth); | |
6340 | #endif | |
6341 | ||
7df02016 | 6342 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 6343 | { |
5f5c8ee5 | 6344 | if (FRAME_HAS_MINIBUF_P (f) && !FRAME_MINIBUF_ONLY_P (f)) |
4588ec20 | 6345 | { |
5f5c8ee5 | 6346 | /* Frame has both root and mini-buffer. */ |
7df02016 | 6347 | XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f))->top_line, |
5f5c8ee5 GM |
6348 | FRAME_TOP_MARGIN (f)); |
6349 | set_window_height (FRAME_ROOT_WINDOW (f), | |
6350 | (newheight | |
6351 | - 1 | |
6352 | - FRAME_TOP_MARGIN (f)), | |
f8748f0f | 6353 | 2); |
7df02016 | 6354 | XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top_line, |
a5d8b611 | 6355 | newheight - 1); |
5f5c8ee5 | 6356 | set_window_height (FRAME_MINIBUF_WINDOW (f), 1, 0); |
4588ec20 JB |
6357 | } |
6358 | else | |
502b9b64 | 6359 | /* Frame has just one top-level window. */ |
5f5c8ee5 | 6360 | set_window_height (FRAME_ROOT_WINDOW (f), |
f8748f0f | 6361 | newheight - FRAME_TOP_MARGIN (f), 2); |
b6a65ac2 | 6362 | |
5f5c8ee5 | 6363 | if (FRAME_TERMCAP_P (f) && !pretend) |
6548cf00 | 6364 | FrameRows (FRAME_TTY (f)) = newheight; |
4588ec20 JB |
6365 | } |
6366 | ||
7df02016 | 6367 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 6368 | { |
f8748f0f | 6369 | set_window_width (FRAME_ROOT_WINDOW (f), new_frame_total_cols, 2); |
5f5c8ee5 | 6370 | if (FRAME_HAS_MINIBUF_P (f)) |
7df02016 | 6371 | set_window_width (FRAME_MINIBUF_WINDOW (f), new_frame_total_cols, 0); |
4588ec20 | 6372 | |
5f5c8ee5 | 6373 | if (FRAME_TERMCAP_P (f) && !pretend) |
6548cf00 | 6374 | FrameCols (FRAME_TTY (f)) = newwidth; |
5f5c8ee5 | 6375 | |
9ea173e8 | 6376 | if (WINDOWP (f->tool_bar_window)) |
7df02016 | 6377 | XSETFASTINT (XWINDOW (f->tool_bar_window)->total_cols, newwidth); |
4588ec20 JB |
6378 | } |
6379 | ||
7df02016 KS |
6380 | FRAME_LINES (f) = newheight; |
6381 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 6382 | |
5f5c8ee5 GM |
6383 | { |
6384 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
6385 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 6386 | |
5f5c8ee5 GM |
6387 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
6388 | &text_area_height); | |
6389 | if (w->cursor.x >= text_area_x + text_area_width) | |
6390 | w->cursor.hpos = w->cursor.x = 0; | |
6391 | if (w->cursor.y >= text_area_y + text_area_height) | |
6392 | w->cursor.vpos = w->cursor.y = 0; | |
6393 | } | |
986e61b8 | 6394 | |
5f5c8ee5 | 6395 | adjust_glyphs (f); |
5f5c8ee5 | 6396 | calculate_costs (f); |
cb02fa39 GM |
6397 | SET_FRAME_GARBAGED (f); |
6398 | f->resized_p = 1; | |
97cf50e7 RS |
6399 | |
6400 | UNBLOCK_INPUT; | |
61730a69 | 6401 | |
e523f7e5 RS |
6402 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); |
6403 | ||
ef264c42 | 6404 | run_window_configuration_change_hook (f); |
e523f7e5 RS |
6405 | |
6406 | unbind_to (count, Qnil); | |
4588ec20 | 6407 | } |
5f5c8ee5 GM |
6408 | |
6409 | ||
4588ec20 | 6410 | \f |
5f5c8ee5 GM |
6411 | /*********************************************************************** |
6412 | Terminal Related Lisp Functions | |
6413 | ***********************************************************************/ | |
6414 | ||
6415 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 6416 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
6417 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
6418 | FILE = nil means just close any termscript file currently open. */) | |
6419 | (file) | |
5f5c8ee5 GM |
6420 | Lisp_Object file; |
6421 | { | |
0b0d3e0b KL |
6422 | struct tty_display_info *tty; |
6423 | ||
6424 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ())) | |
6425 | error ("Current frame is not on a tty device"); | |
6426 | ||
6427 | tty = CURTTY (); | |
6428 | ||
6429 | if (tty->termscript != 0) | |
e18c7093 KL |
6430 | { |
6431 | BLOCK_INPUT; | |
0b0d3e0b | 6432 | fclose (tty->termscript); |
e18c7093 KL |
6433 | UNBLOCK_INPUT; |
6434 | } | |
0b0d3e0b | 6435 | tty->termscript = 0; |
5f5c8ee5 GM |
6436 | |
6437 | if (! NILP (file)) | |
6438 | { | |
6439 | file = Fexpand_file_name (file, Qnil); | |
0b0d3e0b KL |
6440 | tty->termscript = fopen (SDATA (file), "w"); |
6441 | if (tty->termscript == 0) | |
5f5c8ee5 GM |
6442 | report_file_error ("Opening termscript", Fcons (file, Qnil)); |
6443 | } | |
6444 | return Qnil; | |
6445 | } | |
6446 | ||
6447 | ||
4588ec20 | 6448 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
62af879c | 6449 | Ssend_string_to_terminal, 1, 2, 0, |
7ee72033 | 6450 | doc: /* Send STRING to the terminal without alteration. |
62af879c KL |
6451 | Control characters in STRING will have terminal-dependent effects. |
6452 | ||
6ed8eeff | 6453 | Optional parameter TERMINAL specifies the tty terminal device to use. |
62af879c KL |
6454 | It may be a terminal id, a frame, or nil for the terminal used by the |
6455 | currently selected frame. */) | |
6ed8eeff | 6456 | (string, terminal) |
e912ba09 | 6457 | Lisp_Object string; |
6ed8eeff | 6458 | Lisp_Object terminal; |
4588ec20 | 6459 | { |
717a00ef | 6460 | struct terminal *t = get_tty_terminal (terminal, 1); |
0b0d3e0b KL |
6461 | struct tty_display_info *tty; |
6462 | ||
94f3db62 | 6463 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 6464 | CHECK_STRING (string); |
2c1e4409 | 6465 | BLOCK_INPUT; |
0b0d3e0b | 6466 | |
6ed8eeff KL |
6467 | if (!t) |
6468 | error ("Unknown terminal device"); | |
0b0d3e0b | 6469 | |
6ed8eeff | 6470 | tty = t->display_info.tty; |
3fc809e2 | 6471 | |
0b0d3e0b | 6472 | if (tty->termscript) |
4588ec20 | 6473 | { |
0b0d3e0b KL |
6474 | fwrite (SDATA (string), 1, SBYTES (string), tty->termscript); |
6475 | fflush (tty->termscript); | |
4588ec20 | 6476 | } |
0b0d3e0b KL |
6477 | fwrite (SDATA (string), 1, SBYTES (string), tty->output); |
6478 | fflush (tty->output); | |
2c1e4409 | 6479 | UNBLOCK_INPUT; |
4588ec20 JB |
6480 | return Qnil; |
6481 | } | |
6482 | ||
5f5c8ee5 | 6483 | |
4588ec20 | 6484 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 6485 | doc: /* Beep, or flash the screen. |
228299fa | 6486 | Also, unless an argument is given, |
7ee72033 MB |
6487 | terminate any keyboard macro currently executing. */) |
6488 | (arg) | |
4588ec20 JB |
6489 | Lisp_Object arg; |
6490 | { | |
efb859b4 | 6491 | if (!NILP (arg)) |
4588ec20 | 6492 | { |
7fa788da RS |
6493 | if (noninteractive) |
6494 | putchar (07); | |
6495 | else | |
385ed61f | 6496 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
6497 | } |
6498 | else | |
6499 | bitch_at_user (); | |
6500 | ||
6501 | return Qnil; | |
6502 | } | |
6503 | ||
dfcf069d | 6504 | void |
4588ec20 JB |
6505 | bitch_at_user () |
6506 | { | |
6507 | if (noninteractive) | |
6508 | putchar (07); | |
5f5c8ee5 | 6509 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
4588ec20 JB |
6510 | error ("Keyboard macro terminated by a command ringing the bell"); |
6511 | else | |
385ed61f | 6512 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
6513 | } |
6514 | ||
5f5c8ee5 GM |
6515 | |
6516 | \f | |
6517 | /*********************************************************************** | |
6518 | Sleeping, Waiting | |
6519 | ***********************************************************************/ | |
6520 | ||
4588ec20 | 6521 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 6522 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
6523 | SECONDS may be a floating-point value, meaning that you can wait for a |
6524 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
6525 | additional wait period, in milliseconds; this may be useful if your | |
6526 | Emacs was built without floating point support. | |
7ee72033 MB |
6527 | \(Not all operating systems support waiting for a fraction of a second.) */) |
6528 | (seconds, milliseconds) | |
767229f8 | 6529 | Lisp_Object seconds, milliseconds; |
4588ec20 | 6530 | { |
767229f8 | 6531 | int sec, usec; |
4588ec20 | 6532 | |
767229f8 | 6533 | if (NILP (milliseconds)) |
e9c9a718 | 6534 | XSETINT (milliseconds, 0); |
767229f8 | 6535 | else |
b7826503 | 6536 | CHECK_NUMBER (milliseconds); |
b07646f5 JB |
6537 | usec = XINT (milliseconds) * 1000; |
6538 | ||
b07646f5 JB |
6539 | { |
6540 | double duration = extract_float (seconds); | |
6541 | sec = (int) duration; | |
6542 | usec += (duration - sec) * 1000000; | |
6543 | } | |
4588ec20 | 6544 | |
a41f8bed | 6545 | #ifndef EMACS_HAS_USECS |
767229f8 | 6546 | if (sec == 0 && usec != 0) |
861e19b9 | 6547 | error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); |
4588ec20 | 6548 | #endif |
767229f8 JB |
6549 | |
6550 | /* Assure that 0 <= usec < 1000000. */ | |
6551 | if (usec < 0) | |
6552 | { | |
153a073c | 6553 | /* We can't rely on the rounding being correct if usec is negative. */ |
767229f8 JB |
6554 | if (-1000000 < usec) |
6555 | sec--, usec += 1000000; | |
6556 | else | |
6557 | sec -= -usec / 1000000, usec = 1000000 - (-usec % 1000000); | |
4588ec20 | 6558 | } |
767229f8 JB |
6559 | else |
6560 | sec += usec / 1000000, usec %= 1000000; | |
6561 | ||
6b5153b1 | 6562 | if (sec < 0 || (sec == 0 && usec == 0)) |
767229f8 | 6563 | return Qnil; |
4588ec20 | 6564 | |
dcd1ca45 | 6565 | wait_reading_process_output (sec, usec, 0, 0, Qnil, NULL, 0); |
4588ec20 JB |
6566 | |
6567 | return Qnil; | |
6568 | } | |
6569 | ||
5f5c8ee5 | 6570 | |
dcd1ca45 | 6571 | /* This is just like wait_reading_process_output, except that |
902b9b6d | 6572 | it does redisplay. |
f76475ad | 6573 | |
2bcac766 CY |
6574 | TIMEOUT is number of seconds to wait (float or integer), |
6575 | or t to wait forever. | |
902b9b6d KS |
6576 | READING is 1 if reading input. |
6577 | If DO_DISPLAY is >0 display process output while waiting. | |
6578 | If DO_DISPLAY is >1 perform an initial redisplay before waiting. | |
6579 | */ | |
4588ec20 | 6580 | |
f76475ad | 6581 | Lisp_Object |
902b9b6d KS |
6582 | sit_for (timeout, reading, do_display) |
6583 | Lisp_Object timeout; | |
6584 | int reading, do_display; | |
f76475ad | 6585 | { |
902b9b6d | 6586 | int sec, usec; |
f222369e | 6587 | |
902b9b6d | 6588 | swallow_events (do_display); |
ccddf474 | 6589 | |
902b9b6d | 6590 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 6591 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 6592 | return Qnil; |
4588ec20 | 6593 | |
902b9b6d KS |
6594 | if (do_display >= 2) |
6595 | redisplay_preserve_echo_area (2); | |
6596 | ||
8e09f23f | 6597 | if (INTEGERP (timeout)) |
f222369e | 6598 | { |
7ff14773 | 6599 | sec = XINT (timeout); |
8e09f23f | 6600 | usec = 0; |
f222369e | 6601 | } |
8e09f23f KS |
6602 | else if (FLOATP (timeout)) |
6603 | { | |
99a20368 | 6604 | double seconds = XFLOAT_DATA (timeout); |
902b9b6d KS |
6605 | sec = (int) seconds; |
6606 | usec = (int) ((seconds - sec) * 1000000); | |
6607 | } | |
2bcac766 CY |
6608 | else if (EQ (timeout, Qt)) |
6609 | { | |
6610 | sec = 0; | |
6611 | usec = 0; | |
6612 | } | |
902b9b6d | 6613 | else |
8e09f23f | 6614 | wrong_type_argument (Qnumberp, timeout); |
4588ec20 | 6615 | |
2bcac766 | 6616 | if (sec == 0 && usec == 0 && !EQ (timeout, Qt)) |
dfdb645c JB |
6617 | return Qt; |
6618 | ||
4588ec20 | 6619 | #ifdef SIGIO |
8fc798e9 | 6620 | gobble_input (0); |
f76475ad JB |
6621 | #endif |
6622 | ||
902b9b6d | 6623 | wait_reading_process_output (sec, usec, reading ? -1 : 1, do_display, |
dcd1ca45 | 6624 | Qnil, NULL, 0); |
f76475ad | 6625 | |
4588ec20 JB |
6626 | return detect_input_pending () ? Qnil : Qt; |
6627 | } | |
6628 | ||
5f5c8ee5 | 6629 | |
01327edf KS |
6630 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
6631 | doc: /* Perform redisplay if no input is available. | |
a5c2c707 | 6632 | If optional arg FORCE is non-nil or `redisplay-dont-pause' is non-nil, |
03240971 KS |
6633 | perform a full redisplay even if input is available. |
6634 | Return t if redisplay was performed, nil otherwise. */) | |
01327edf KS |
6635 | (force) |
6636 | Lisp_Object force; | |
f76475ad | 6637 | { |
01327edf | 6638 | int count; |
659d9874 | 6639 | |
902b9b6d KS |
6640 | swallow_events (1); |
6641 | if ((detect_input_pending_run_timers (1) | |
01327edf | 6642 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
6643 | || !NILP (Vexecuting_kbd_macro)) |
6644 | return Qnil; | |
f76475ad | 6645 | |
01327edf KS |
6646 | count = SPECPDL_INDEX (); |
6647 | if (!NILP (force) && !redisplay_dont_pause) | |
6648 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 6649 | redisplay_preserve_echo_area (2); |
01327edf | 6650 | unbind_to (count, Qnil); |
7ba07a1a | 6651 | return Qt; |
f76475ad | 6652 | } |
5f5c8ee5 GM |
6653 | |
6654 | ||
6655 | \f | |
6656 | /*********************************************************************** | |
6657 | Other Lisp Functions | |
6658 | ***********************************************************************/ | |
6659 | ||
6660 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
6661 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 6662 | buffer-modified-flags. */ |
5f5c8ee5 GM |
6663 | |
6664 | static Lisp_Object frame_and_buffer_state; | |
6665 | ||
6666 | ||
6667 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 6668 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 6669 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
6670 | VARIABLE is a variable name whose value is either nil or a state vector |
6671 | that will be updated to contain all frames and buffers, | |
228299fa | 6672 | aside from buffers whose names start with space, |
44edd521 RS |
6673 | along with the buffers' read-only and modified flags. This allows a fast |
6674 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 6675 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
6676 | the current state. |
6677 | ||
6678 | If VARIABLE is nil, an internal variable is used. Users should not | |
6679 | pass nil for VARIABLE. */) | |
6680 | (variable) | |
6681 | Lisp_Object variable; | |
5f5c8ee5 | 6682 | { |
44edd521 RS |
6683 | Lisp_Object state, tail, frame, buf; |
6684 | Lisp_Object *vecp, *end; | |
5f5c8ee5 GM |
6685 | int n; |
6686 | ||
44edd521 RS |
6687 | if (! NILP (variable)) |
6688 | { | |
6689 | CHECK_SYMBOL (variable); | |
6690 | state = Fsymbol_value (variable); | |
6691 | if (! VECTORP (state)) | |
6692 | goto changed; | |
6693 | } | |
6694 | else | |
6695 | state = frame_and_buffer_state; | |
6696 | ||
6697 | vecp = XVECTOR (state)->contents; | |
6698 | end = vecp + XVECTOR (state)->size; | |
6699 | ||
5f5c8ee5 GM |
6700 | FOR_EACH_FRAME (tail, frame) |
6701 | { | |
44edd521 RS |
6702 | if (vecp == end) |
6703 | goto changed; | |
5f5c8ee5 GM |
6704 | if (!EQ (*vecp++, frame)) |
6705 | goto changed; | |
44edd521 RS |
6706 | if (vecp == end) |
6707 | goto changed; | |
5f5c8ee5 GM |
6708 | if (!EQ (*vecp++, XFRAME (frame)->name)) |
6709 | goto changed; | |
6710 | } | |
44edd521 | 6711 | /* Check that the buffer info matches. */ |
7539e11f | 6712 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6713 | { |
7539e11f | 6714 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6715 | /* Ignore buffers that aren't included in buffer lists. */ |
d5db4077 | 6716 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
5f5c8ee5 | 6717 | continue; |
44edd521 RS |
6718 | if (vecp == end) |
6719 | goto changed; | |
5f5c8ee5 GM |
6720 | if (!EQ (*vecp++, buf)) |
6721 | goto changed; | |
44edd521 RS |
6722 | if (vecp == end) |
6723 | goto changed; | |
5f5c8ee5 GM |
6724 | if (!EQ (*vecp++, XBUFFER (buf)->read_only)) |
6725 | goto changed; | |
44edd521 RS |
6726 | if (vecp == end) |
6727 | goto changed; | |
5f5c8ee5 GM |
6728 | if (!EQ (*vecp++, Fbuffer_modified_p (buf))) |
6729 | goto changed; | |
6730 | } | |
44edd521 RS |
6731 | if (vecp == end) |
6732 | goto changed; | |
5f5c8ee5 GM |
6733 | /* Detect deletion of a buffer at the end of the list. */ |
6734 | if (EQ (*vecp, Qlambda)) | |
6735 | return Qnil; | |
44edd521 RS |
6736 | |
6737 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 6738 | changed: |
44edd521 RS |
6739 | /* Count the size we will need. |
6740 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
6741 | n = 1; |
6742 | FOR_EACH_FRAME (tail, frame) | |
6743 | n += 2; | |
7539e11f | 6744 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6745 | n += 3; |
44edd521 RS |
6746 | /* Reallocate the vector if data has grown to need it, |
6747 | or if it has shrunk a lot. */ | |
6748 | if (! VECTORP (state) | |
6749 | || n > XVECTOR (state)->size | |
6750 | || n + 20 < XVECTOR (state)->size / 2) | |
5f5c8ee5 | 6751 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
6752 | { |
6753 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
6754 | if (! NILP (variable)) | |
6755 | Fset (variable, state); | |
6756 | else | |
6757 | frame_and_buffer_state = state; | |
6758 | } | |
6759 | ||
6760 | /* Record the new data in the (possibly reallocated) vector. */ | |
6761 | vecp = XVECTOR (state)->contents; | |
5f5c8ee5 GM |
6762 | FOR_EACH_FRAME (tail, frame) |
6763 | { | |
6764 | *vecp++ = frame; | |
6765 | *vecp++ = XFRAME (frame)->name; | |
6766 | } | |
7539e11f | 6767 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6768 | { |
7539e11f | 6769 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6770 | /* Ignore buffers that aren't included in buffer lists. */ |
d5db4077 | 6771 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
5f5c8ee5 GM |
6772 | continue; |
6773 | *vecp++ = buf; | |
6774 | *vecp++ = XBUFFER (buf)->read_only; | |
6775 | *vecp++ = Fbuffer_modified_p (buf); | |
6776 | } | |
6777 | /* Fill up the vector with lambdas (always at least one). */ | |
6778 | *vecp++ = Qlambda; | |
44edd521 RS |
6779 | while (vecp - XVECTOR (state)->contents |
6780 | < XVECTOR (state)->size) | |
5f5c8ee5 GM |
6781 | *vecp++ = Qlambda; |
6782 | /* Make sure we didn't overflow the vector. */ | |
44edd521 RS |
6783 | if (vecp - XVECTOR (state)->contents |
6784 | > XVECTOR (state)->size) | |
5f5c8ee5 GM |
6785 | abort (); |
6786 | return Qt; | |
6787 | } | |
6788 | ||
6789 | ||
4588ec20 | 6790 | \f |
5f5c8ee5 GM |
6791 | /*********************************************************************** |
6792 | Initialization | |
6793 | ***********************************************************************/ | |
6794 | ||
5f5c8ee5 GM |
6795 | /* Initialization done when Emacs fork is started, before doing stty. |
6796 | Determine terminal type and set terminal_driver. Then invoke its | |
6797 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 6798 | |
dfcf069d | 6799 | void |
4588ec20 JB |
6800 | init_display () |
6801 | { | |
28d440ab KL |
6802 | char *terminal_type; |
6803 | ||
4588ec20 JB |
6804 | #ifdef HAVE_X_WINDOWS |
6805 | extern int display_arg; | |
6806 | #endif | |
6807 | ||
5f5c8ee5 GM |
6808 | /* Construct the space glyph. */ |
6809 | space_glyph.type = CHAR_GLYPH; | |
3fc809e2 | 6810 | SET_CHAR_GLYPH (space_glyph, ' ', DEFAULT_FACE_ID, 0); |
5f5c8ee5 GM |
6811 | space_glyph.charpos = -1; |
6812 | ||
4588ec20 JB |
6813 | inverse_video = 0; |
6814 | cursor_in_echo_area = 0; | |
6815 | terminal_type = (char *) 0; | |
6816 | ||
1315c181 JB |
6817 | /* Now is the time to initialize this; it's used by init_sys_modes |
6818 | during startup. */ | |
2246281f | 6819 | Vinitial_window_system = Qnil; |
4588ec20 | 6820 | |
4181ad9c KL |
6821 | /* SIGWINCH needs to be handled no matter what display we start |
6822 | with. Otherwise newly opened tty frames will not resize | |
6823 | automatically. */ | |
6824 | #ifdef SIGWINCH | |
6825 | #ifndef CANNOT_DUMP | |
6826 | if (initialized) | |
6827 | #endif /* CANNOT_DUMP */ | |
6828 | signal (SIGWINCH, window_change_signal); | |
6829 | #endif /* SIGWINCH */ | |
4588ec20 | 6830 | |
1315c181 JB |
6831 | /* If the user wants to use a window system, we shouldn't bother |
6832 | initializing the terminal. This is especially important when the | |
6833 | terminal is so dumb that emacs gives up before and doesn't bother | |
6834 | using the window system. | |
4588ec20 | 6835 | |
36bbad1d KH |
6836 | If the DISPLAY environment variable is set and nonempty, |
6837 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6838 | |
6839 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 6840 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 6841 | { |
36bbad1d | 6842 | char *display; |
d460af17 | 6843 | #ifdef VMS |
36bbad1d | 6844 | display = getenv ("DECW$DISPLAY"); |
d460af17 | 6845 | #else |
36bbad1d | 6846 | display = getenv ("DISPLAY"); |
d460af17 | 6847 | #endif |
36bbad1d KH |
6848 | |
6849 | display_arg = (display != 0 && *display != 0); | |
c1fc674b AS |
6850 | |
6851 | if (display_arg && !x_display_ok (display)) | |
6852 | { | |
6853 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
6854 | display); | |
6855 | inhibit_window_system = 1; | |
6856 | } | |
f040093a | 6857 | } |
d460af17 | 6858 | |
177c0ea7 | 6859 | if (!inhibit_window_system && display_arg |
9e4555e8 RS |
6860 | #ifndef CANNOT_DUMP |
6861 | && initialized | |
6862 | #endif | |
6863 | ) | |
4588ec20 | 6864 | { |
2246281f | 6865 | Vinitial_window_system = intern ("x"); |
4588ec20 JB |
6866 | #ifdef HAVE_X11 |
6867 | Vwindow_system_version = make_number (11); | |
6868 | #else | |
6869 | Vwindow_system_version = make_number (10); | |
039e5d71 | 6870 | #endif |
8a2a6032 | 6871 | #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES) |
039e5d71 | 6872 | /* In some versions of ncurses, |
6a428f77 | 6873 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6874 | So call tgetent. */ |
6875 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 | 6876 | #endif |
5f5c8ee5 | 6877 | adjust_frame_glyphs_initially (); |
4588ec20 JB |
6878 | return; |
6879 | } | |
6880 | #endif /* HAVE_X_WINDOWS */ | |
6881 | ||
fd2e066a | 6882 | #ifdef HAVE_NTGUI |
177c0ea7 | 6883 | if (!inhibit_window_system) |
fd2e066a | 6884 | { |
2246281f | 6885 | Vinitial_window_system = intern ("w32"); |
fd2e066a | 6886 | Vwindow_system_version = make_number (1); |
5f5c8ee5 | 6887 | adjust_frame_glyphs_initially (); |
fd2e066a GV |
6888 | return; |
6889 | } | |
6890 | #endif /* HAVE_NTGUI */ | |
6891 | ||
e0f712ba | 6892 | #ifdef MAC_OS |
177c0ea7 | 6893 | if (!inhibit_window_system) |
1a578e9b | 6894 | { |
2246281f | 6895 | Vinitial_window_system = intern ("mac"); |
1a578e9b AC |
6896 | Vwindow_system_version = make_number (1); |
6897 | adjust_frame_glyphs_initially (); | |
6898 | return; | |
6899 | } | |
e0f712ba | 6900 | #endif /* MAC_OS */ |
1a578e9b | 6901 | |
edfda783 AR |
6902 | #ifdef HAVE_NS |
6903 | if (!inhibit_window_system | |
6904 | #ifndef CANNOT_DUMP | |
6905 | && initialized | |
6906 | #endif | |
6907 | ) | |
6908 | { | |
6909 | Vinitial_window_system = intern("ns"); | |
6910 | Vwindow_system_version = make_number(10); | |
6911 | adjust_frame_glyphs_initially (); | |
6912 | return; | |
6913 | } | |
6914 | #endif | |
6915 | ||
4588ec20 JB |
6916 | /* If no window system has been specified, try to use the terminal. */ |
6917 | if (! isatty (0)) | |
6918 | { | |
1559a86d | 6919 | fatal ("standard input is not a tty"); |
4588ec20 JB |
6920 | exit (1); |
6921 | } | |
6922 | ||
6152361f JR |
6923 | #ifdef WINDOWSNT |
6924 | terminal_type = "w32console"; | |
6925 | #else | |
153a073c | 6926 | /* Look at the TERM variable. */ |
4588ec20 | 6927 | terminal_type = (char *) getenv ("TERM"); |
6152361f | 6928 | #endif |
4588ec20 JB |
6929 | if (!terminal_type) |
6930 | { | |
6931 | #ifdef VMS | |
6932 | fprintf (stderr, "Please specify your terminal type.\n\ | |
6933 | For types defined in VMS, use set term /device=TYPE.\n\ | |
6934 | For types not defined in VMS, use define emacs_term \"TYPE\".\n\ | |
6935 | \(The quotation marks are necessary since terminal types are lower case.)\n"); | |
5d12ff0b RS |
6936 | #else /* not VMS */ |
6937 | ||
6938 | #ifdef HAVE_WINDOW_SYSTEM | |
b9e590fc RS |
6939 | if (! inhibit_window_system) |
6940 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6941 | else |
6942 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6943 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
5d12ff0b | 6944 | #endif /* not VMS */ |
4588ec20 JB |
6945 | exit (1); |
6946 | } | |
6947 | ||
6948 | #ifdef VMS | |
5f5c8ee5 | 6949 | /* VMS DCL tends to up-case things, so down-case term type. |
4588ec20 JB |
6950 | Hardly any uppercase letters in terminal types; should be none. */ |
6951 | { | |
6952 | char *new = (char *) xmalloc (strlen (terminal_type) + 1); | |
6953 | char *p; | |
6954 | ||
6955 | strcpy (new, terminal_type); | |
6956 | ||
6957 | for (p = new; *p; p++) | |
6958 | if (isupper (*p)) | |
6959 | *p = tolower (*p); | |
6960 | ||
6961 | terminal_type = new; | |
177c0ea7 | 6962 | } |
5f5c8ee5 | 6963 | #endif /* VMS */ |
4588ec20 | 6964 | |
0a125897 | 6965 | { |
6ed8eeff | 6966 | struct terminal *t; |
3224dac1 KL |
6967 | struct frame *f = XFRAME (selected_frame); |
6968 | ||
6969 | /* Open a display on the controlling tty. */ | |
6ed8eeff | 6970 | t = init_tty (0, terminal_type, 1); /* Errors are fatal. */ |
3224dac1 KL |
6971 | |
6972 | /* Convert the initial frame to use the new display. */ | |
b04f5ad2 | 6973 | if (f->output_method != output_initial) |
3224dac1 | 6974 | abort (); |
6ed8eeff KL |
6975 | f->output_method = t->type; |
6976 | f->terminal = t; | |
3224dac1 | 6977 | |
6ed8eeff KL |
6978 | t->reference_count++; |
6979 | t->display_info.tty->top_frame = selected_frame; | |
5b65d888 | 6980 | change_frame_size (XFRAME (selected_frame), |
6ed8eeff KL |
6981 | FrameRows (t->display_info.tty), |
6982 | FrameCols (t->display_info.tty), 0, 0, 1); | |
3224dac1 | 6983 | |
6ed8eeff KL |
6984 | /* Delete the initial terminal. */ |
6985 | if (--initial_terminal->reference_count == 0 | |
6986 | && initial_terminal->delete_terminal_hook) | |
6987 | (*initial_terminal->delete_terminal_hook) (initial_terminal); | |
2666355c KL |
6988 | |
6989 | /* Update frame parameters to reflect the new type. */ | |
6990 | Fmodify_frame_parameters | |
6991 | (selected_frame, Fcons (Fcons (Qtty_type, | |
6ed8eeff | 6992 | Ftty_type (selected_frame)), Qnil)); |
5b65d888 | 6993 | Fmodify_frame_parameters (selected_frame, Fcons (Fcons (Qtty, Qnil), Qnil)); |
0a125897 | 6994 | } |
3fc809e2 | 6995 | |
d86c299a | 6996 | { |
91fb7e1b | 6997 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6998 | int width = FRAME_TOTAL_COLS (sf); |
6999 | int height = FRAME_LINES (sf); | |
d86c299a | 7000 | |
5f5c8ee5 | 7001 | unsigned int total_glyphs = height * (width + 2) * sizeof (struct glyph); |
d86c299a | 7002 | |
5f5c8ee5 GM |
7003 | /* If these sizes are so big they cause overflow, just ignore the |
7004 | change. It's not clear what better we could do. */ | |
7005 | if (total_glyphs / sizeof (struct glyph) / height != width + 2) | |
1559a86d | 7006 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
7007 | } |
7008 | ||
5f5c8ee5 | 7009 | adjust_frame_glyphs_initially (); |
91fb7e1b | 7010 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 7011 | |
5f5c8ee5 GM |
7012 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ |
7013 | if (initialized | |
7014 | && !noninteractive | |
622dca89 EZ |
7015 | #ifdef MSDOS |
7016 | /* The MSDOS terminal turns on its ``window system'' relatively | |
7017 | late into the startup, so we cannot do the frame faces' | |
7018 | initialization just yet. It will be done later by pc-win.el | |
7019 | and internal_terminal_init. */ | |
7020 | && (strcmp (terminal_type, "internal") != 0 || inhibit_window_system) | |
7021 | #endif | |
2246281f | 7022 | && NILP (Vinitial_window_system)) |
2d764c78 EZ |
7023 | { |
7024 | /* For the initial frame, we don't have any way of knowing what | |
7025 | are the foreground and background colors of the terminal. */ | |
7026 | struct frame *sf = SELECTED_FRAME(); | |
7027 | ||
f9d2fdc4 EZ |
7028 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
7029 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
7030 | call0 (intern ("tty-set-up-initial-frame-faces")); |
7031 | } | |
5f5c8ee5 GM |
7032 | } |
7033 | ||
7034 | ||
7035 | \f | |
7036 | /*********************************************************************** | |
7037 | Blinking cursor | |
7038 | ***********************************************************************/ | |
7039 | ||
c3f13540 | 7040 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 7041 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 7042 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
7043 | WINDOW nil means use the selected window. SHOW non-nil means |
7044 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 MB |
7045 | don't show a cursor. */) |
7046 | (window, show) | |
5d7791b3 | 7047 | Lisp_Object window, show; |
5f5c8ee5 | 7048 | { |
5f5c8ee5 GM |
7049 | /* Don't change cursor state while redisplaying. This could confuse |
7050 | output routines. */ | |
7051 | if (!redisplaying_p) | |
7052 | { | |
7053 | if (NILP (window)) | |
7054 | window = selected_window; | |
7055 | else | |
b7826503 | 7056 | CHECK_WINDOW (window); |
177c0ea7 | 7057 | |
5d7791b3 | 7058 | XWINDOW (window)->cursor_off_p = NILP (show); |
5f5c8ee5 GM |
7059 | } |
7060 | ||
7061 | return Qnil; | |
4588ec20 | 7062 | } |
5f5c8ee5 GM |
7063 | |
7064 | ||
5d7791b3 GM |
7065 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
7066 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 7067 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 MB |
7068 | WINDOW nil or omitted means report on the selected window. */) |
7069 | (window) | |
5d7791b3 GM |
7070 | Lisp_Object window; |
7071 | { | |
7072 | struct window *w; | |
177c0ea7 | 7073 | |
5d7791b3 GM |
7074 | if (NILP (window)) |
7075 | window = selected_window; | |
7076 | else | |
b7826503 | 7077 | CHECK_WINDOW (window); |
177c0ea7 | 7078 | |
5d7791b3 | 7079 | w = XWINDOW (window); |
177c0ea7 | 7080 | return w->cursor_off_p ? Qnil : Qt; |
5d7791b3 GM |
7081 | } |
7082 | ||
87478b52 SM |
7083 | DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame, |
7084 | Slast_nonminibuf_frame, 0, 0, 0, | |
7085 | doc: /* Value is last nonminibuffer frame. */) | |
7086 | () | |
7087 | { | |
4958ed94 | 7088 | Lisp_Object frame = Qnil; |
87478b52 | 7089 | |
4958ed94 SM |
7090 | if (last_nonminibuf_frame) |
7091 | XSETFRAME (frame, last_nonminibuf_frame); | |
87478b52 SM |
7092 | |
7093 | return frame; | |
7094 | } | |
4588ec20 | 7095 | \f |
5f5c8ee5 GM |
7096 | /*********************************************************************** |
7097 | Initialization | |
7098 | ***********************************************************************/ | |
7099 | ||
dfcf069d | 7100 | void |
4588ec20 JB |
7101 | syms_of_display () |
7102 | { | |
502b9b64 | 7103 | defsubr (&Sredraw_frame); |
4588ec20 | 7104 | defsubr (&Sredraw_display); |
078b3696 | 7105 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
7106 | defsubr (&Sopen_termscript); |
7107 | defsubr (&Sding); | |
7ba07a1a | 7108 | defsubr (&Sredisplay); |
4588ec20 JB |
7109 | defsubr (&Ssleep_for); |
7110 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 7111 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 7112 | defsubr (&Sinternal_show_cursor_p); |
87478b52 | 7113 | defsubr (&Slast_nonminibuf_frame); |
4588ec20 | 7114 | |
2d5912c1 | 7115 | #if GLYPH_DEBUG |
9b0e97aa GM |
7116 | defsubr (&Sdump_redisplay_history); |
7117 | #endif | |
7118 | ||
d1dad759 | 7119 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
7120 | staticpro (&frame_and_buffer_state); |
7121 | ||
9cda4f7c RS |
7122 | Qdisplay_table = intern ("display-table"); |
7123 | staticpro (&Qdisplay_table); | |
e7067d00 GM |
7124 | Qredisplay_dont_pause = intern ("redisplay-dont-pause"); |
7125 | staticpro (&Qredisplay_dont_pause); | |
9cda4f7c | 7126 | |
7ee72033 | 7127 | DEFVAR_INT ("baud-rate", &baud_rate, |
bacf09b4 | 7128 | doc: /* *The output baud rate of the terminal. |
228299fa GM |
7129 | On most systems, changing this value will affect the amount of padding |
7130 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 7131 | |
7ee72033 | 7132 | DEFVAR_BOOL ("inverse-video", &inverse_video, |
bacf09b4 | 7133 | doc: /* *Non-nil means invert the entire frame display. |
228299fa | 7134 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 7135 | |
7ee72033 | 7136 | DEFVAR_BOOL ("visible-bell", &visible_bell, |
bacf09b4 | 7137 | doc: /* *Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
7138 | |
7139 | See also `ring-bell-function'. */); | |
177c0ea7 | 7140 | |
7ee72033 | 7141 | DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter, |
bacf09b4 | 7142 | doc: /* *Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
7143 | A non-nil value is useful if the terminal can automatically preserve |
7144 | Emacs's frame display when you reenter Emacs. | |
7145 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 7146 | |
2246281f KL |
7147 | DEFVAR_LISP ("initial-window-system", &Vinitial_window_system, |
7148 | doc: /* Name of the window system that Emacs uses for the first frame. | |
85565e9e RS |
7149 | The value is a symbol--for instance, `x' for X windows. |
7150 | The value is nil if Emacs is using a text-only terminal. */); | |
177c0ea7 | 7151 | |
70b8d0a4 SM |
7152 | DEFVAR_KBOARD ("window-system", Vwindow_system, |
7153 | doc: /* Name of window system through which the selected frame is displayed. | |
7154 | The value is a symbol--for instance, `x' for X windows. | |
7155 | The value is nil if the selected frame is on a text-only-terminal. */); | |
7156 | ||
7ee72033 | 7157 | DEFVAR_LISP ("window-system-version", &Vwindow_system_version, |
bacf09b4 | 7158 | doc: /* The version number of the window system in use. |
c22140f6 | 7159 | For X windows, this is 11. */); |
177c0ea7 | 7160 | |
7ee72033 | 7161 | DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area, |
bacf09b4 | 7162 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 7163 | |
7ee72033 | 7164 | DEFVAR_LISP ("glyph-table", &Vglyph_table, |
bacf09b4 | 7165 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
7166 | If not nil, this is a vector indexed by glyph code to define the glyph. |
7167 | Each element can be: | |
7168 | integer: a glyph code which this glyph is an alias for. | |
7169 | string: output this glyph using that string (not impl. in X windows). | |
7170 | nil: this glyph mod 524288 is the code of a character to output, | |
7171 | and this glyph / 524288 is the face number (see `face-id') to use | |
7172 | while outputting it. */); | |
4588ec20 JB |
7173 | Vglyph_table = Qnil; |
7174 | ||
7ee72033 | 7175 | DEFVAR_LISP ("standard-display-table", &Vstandard_display_table, |
bacf09b4 | 7176 | doc: /* Display table to use for buffers that specify none. |
228299fa | 7177 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
7178 | Vstandard_display_table = Qnil; |
7179 | ||
7ee72033 | 7180 | DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause, |
bacf09b4 | 7181 | doc: /* *Non-nil means update isn't paused when input is detected. */); |
5f5c8ee5 GM |
7182 | redisplay_dont_pause = 0; |
7183 | ||
d012c62b KS |
7184 | #if PERIODIC_PREEMPTION_CHECKING |
7185 | DEFVAR_LISP ("redisplay-preemption-period", &Vredisplay_preemption_period, | |
7186 | doc: /* *The period in seconds between checking for input during redisplay. | |
7187 | If input is detected, redisplay is pre-empted, and the input is processed. | |
7188 | If nil, never pre-empt redisplay. */); | |
7189 | Vredisplay_preemption_period = make_float (0.10); | |
7190 | #endif | |
7191 | ||
4588ec20 JB |
7192 | #ifdef CANNOT_DUMP |
7193 | if (noninteractive) | |
7194 | #endif | |
7195 | { | |
2246281f | 7196 | Vinitial_window_system = Qnil; |
4588ec20 JB |
7197 | Vwindow_system_version = Qnil; |
7198 | } | |
7199 | } | |
6b61353c KH |
7200 | |
7201 | /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413 | |
7202 | (do not change this comment) */ |