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 | ||
8 | GNU Emacs is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
684d6f5b | 10 | the Free Software Foundation; either version 3, or (at your option) |
4588ec20 JB |
11 | any later version. |
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 | |
19 | along with GNU Emacs; see the file COPYING. If not, write to | |
4fc5845f LK |
20 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
21 | Boston, MA 02110-1301, USA. */ | |
4588ec20 | 22 | |
18160b98 | 23 | #include <config.h> |
68c45bf0 | 24 | #include <signal.h> |
565620a5 | 25 | #include <stdio.h> |
4588ec20 JB |
26 | #include <ctype.h> |
27 | ||
dfcf069d AS |
28 | #ifdef HAVE_UNISTD_H |
29 | #include <unistd.h> | |
30 | #endif | |
31 | ||
47099d6f | 32 | #include "lisp.h" |
4588ec20 JB |
33 | #include "termchar.h" |
34 | #include "termopts.h" | |
a0879520 | 35 | /* cm.h must come after dispextern.h on Windows. */ |
fd2e066a GV |
36 | #include "dispextern.h" |
37 | #include "cm.h" | |
4588ec20 | 38 | #include "buffer.h" |
24e86043 | 39 | #include "charset.h" |
d43721a2 | 40 | #include "keyboard.h" |
502b9b64 | 41 | #include "frame.h" |
428a555e | 42 | #include "termhooks.h" |
4588ec20 JB |
43 | #include "window.h" |
44 | #include "commands.h" | |
45 | #include "disptab.h" | |
46 | #include "indent.h" | |
d169fe39 | 47 | #include "intervals.h" |
97cf50e7 | 48 | #include "blockinput.h" |
dfcf069d | 49 | #include "process.h" |
4588ec20 | 50 | |
24e86043 KH |
51 | /* I don't know why DEC Alpha OSF1 fail to compile this file if we |
52 | include the following file. */ | |
53 | /* #include "systty.h" */ | |
58b2bb63 | 54 | #include "syssignal.h" |
a41f8bed | 55 | |
4588ec20 JB |
56 | #ifdef HAVE_X_WINDOWS |
57 | #include "xterm.h" | |
5f5c8ee5 | 58 | #endif /* HAVE_X_WINDOWS */ |
4588ec20 | 59 | |
fd2e066a GV |
60 | #ifdef HAVE_NTGUI |
61 | #include "w32term.h" | |
62 | #endif /* HAVE_NTGUI */ | |
63 | ||
e0f712ba | 64 | #ifdef MAC_OS |
1a578e9b | 65 | #include "macterm.h" |
e0f712ba | 66 | #endif /* MAC_OS */ |
1a578e9b | 67 | |
5f5c8ee5 | 68 | /* Include systime.h after xterm.h to avoid double inclusion of time.h. */ |
6cbd1643 | 69 | |
5f5c8ee5 | 70 | #include "systime.h" |
3883a901 RS |
71 | #include <errno.h> |
72 | ||
5f5c8ee5 GM |
73 | /* To get the prototype for `sleep'. */ |
74 | ||
75 | #ifdef HAVE_UNISTD_H | |
76 | #include <unistd.h> | |
77 | #endif | |
78 | ||
4588ec20 | 79 | /* Get number of chars of output now in the buffer of a stdio stream. |
5f5c8ee5 GM |
80 | This ought to be built in in stdio, but it isn't. Some s- files |
81 | override this because their stdio internals differ. */ | |
82 | ||
e3271ae5 | 83 | #ifdef __GNU_LIBRARY__ |
5f5c8ee5 GM |
84 | |
85 | /* The s- file might have overridden the definition with one that | |
86 | works for the system's C library. But we are using the GNU C | |
87 | library, so this is the right definition for every system. */ | |
88 | ||
3883a901 RS |
89 | #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT |
90 | #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT | |
91 | #else | |
cb5558ff | 92 | #undef PENDING_OUTPUT_COUNT |
e3271ae5 | 93 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer) |
3883a901 RS |
94 | #endif |
95 | #else /* not __GNU_LIBRARY__ */ | |
68c45bf0 PE |
96 | #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING |
97 | #include <stdio_ext.h> | |
98 | #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE) | |
99 | #endif | |
cb5558ff | 100 | #ifndef PENDING_OUTPUT_COUNT |
4588ec20 JB |
101 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) |
102 | #endif | |
5f5c8ee5 GM |
103 | #endif /* not __GNU_LIBRARY__ */ |
104 | ||
8a2a6032 | 105 | #if defined(HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES) |
fa0ec9f4 DL |
106 | #include <term.h> /* for tgetent */ |
107 | #endif | |
5f5c8ee5 GM |
108 | \f |
109 | /* Structure to pass dimensions around. Used for character bounding | |
110 | boxes, glyph matrix dimensions and alike. */ | |
111 | ||
112 | struct dim | |
113 | { | |
114 | int width; | |
115 | int height; | |
116 | }; | |
117 | ||
118 | \f | |
119 | /* Function prototypes. */ | |
120 | ||
bccee4f2 GM |
121 | static struct glyph_matrix *save_current_matrix P_ ((struct frame *)); |
122 | static void restore_current_matrix P_ ((struct frame *, struct glyph_matrix *)); | |
075757cc | 123 | static int showing_window_margins_p P_ ((struct window *)); |
c9f00270 | 124 | static void fake_current_matrices P_ ((Lisp_Object)); |
408f5064 GM |
125 | static void redraw_overlapping_rows P_ ((struct window *, int)); |
126 | static void redraw_overlapped_rows P_ ((struct window *, int)); | |
5f5c8ee5 GM |
127 | static int count_blanks P_ ((struct glyph *, int)); |
128 | static int count_match P_ ((struct glyph *, struct glyph *, | |
129 | struct glyph *, struct glyph *)); | |
130 | static unsigned line_draw_cost P_ ((struct glyph_matrix *, int)); | |
131 | static void update_frame_line P_ ((struct frame *, int)); | |
132 | static struct dim allocate_matrices_for_frame_redisplay | |
5d3cc43c GM |
133 | P_ ((Lisp_Object, int, int, int, int *)); |
134 | static void allocate_matrices_for_window_redisplay P_ ((struct window *)); | |
5f5c8ee5 GM |
135 | static int realloc_glyph_pool P_ ((struct glyph_pool *, struct dim)); |
136 | static void adjust_frame_glyphs P_ ((struct frame *)); | |
137 | struct glyph_matrix *new_glyph_matrix P_ ((struct glyph_pool *)); | |
138 | static void free_glyph_matrix P_ ((struct glyph_matrix *)); | |
139 | static void adjust_glyph_matrix P_ ((struct window *, struct glyph_matrix *, | |
140 | int, int, struct dim)); | |
b96fd3e8 | 141 | static void change_frame_size_1 P_ ((struct frame *, int, int, int, int, int)); |
5f5c8ee5 | 142 | static void swap_glyph_pointers P_ ((struct glyph_row *, struct glyph_row *)); |
f1d2ce7f | 143 | #if GLYPH_DEBUG |
5f5c8ee5 | 144 | static int glyph_row_slice_p P_ ((struct glyph_row *, struct glyph_row *)); |
9339e87f | 145 | #endif |
5f5c8ee5 GM |
146 | static void fill_up_frame_row_with_spaces P_ ((struct glyph_row *, int)); |
147 | static void build_frame_matrix_from_window_tree P_ ((struct glyph_matrix *, | |
148 | struct window *)); | |
149 | static void build_frame_matrix_from_leaf_window P_ ((struct glyph_matrix *, | |
150 | struct window *)); | |
151 | static struct glyph_pool *new_glyph_pool P_ ((void)); | |
152 | static void free_glyph_pool P_ ((struct glyph_pool *)); | |
153 | static void adjust_frame_glyphs_initially P_ ((void)); | |
154 | static void adjust_frame_message_buffer P_ ((struct frame *)); | |
155 | static void adjust_decode_mode_spec_buffer P_ ((struct frame *)); | |
156 | static void fill_up_glyph_row_with_spaces P_ ((struct glyph_row *)); | |
157 | static void build_frame_matrix P_ ((struct frame *)); | |
158 | void clear_current_matrices P_ ((struct frame *)); | |
159 | void scroll_glyph_matrix_range P_ ((struct glyph_matrix *, int, int, | |
160 | int, int)); | |
161 | static void clear_window_matrices P_ ((struct window *, int)); | |
162 | static void fill_up_glyph_row_area_with_spaces P_ ((struct glyph_row *, int)); | |
163 | static int scrolling_window P_ ((struct window *, int)); | |
e876ff42 | 164 | static int update_window_line P_ ((struct window *, int, int *)); |
5f5c8ee5 | 165 | static void update_marginal_area P_ ((struct window *, int, int)); |
408f5064 | 166 | static int update_text_area P_ ((struct window *, int)); |
5f5c8ee5 GM |
167 | static void make_current P_ ((struct glyph_matrix *, struct glyph_matrix *, |
168 | int)); | |
169 | static void mirror_make_current P_ ((struct window *, int)); | |
170 | void check_window_matrix_pointers P_ ((struct window *)); | |
b96fd3e8 | 171 | #if GLYPH_DEBUG |
5f5c8ee5 GM |
172 | static void check_matrix_pointers P_ ((struct glyph_matrix *, |
173 | struct glyph_matrix *)); | |
b96fd3e8 | 174 | #endif |
5f5c8ee5 GM |
175 | static void mirror_line_dance P_ ((struct window *, int, int, int *, char *)); |
176 | static int update_window_tree P_ ((struct window *, int)); | |
177 | static int update_window P_ ((struct window *, int)); | |
178 | static int update_frame_1 P_ ((struct frame *, int, int)); | |
179 | static void set_window_cursor_after_update P_ ((struct window *)); | |
180 | static int row_equal_p P_ ((struct window *, struct glyph_row *, | |
e4e0bee9 | 181 | struct glyph_row *, int)); |
5f5c8ee5 GM |
182 | static void adjust_frame_glyphs_for_window_redisplay P_ ((struct frame *)); |
183 | static void adjust_frame_glyphs_for_frame_redisplay P_ ((struct frame *)); | |
184 | static void reverse_rows P_ ((struct glyph_matrix *, int, int)); | |
185 | static int margin_glyphs_to_reserve P_ ((struct window *, int, Lisp_Object)); | |
a13396c9 GM |
186 | static void sync_window_with_frame_matrix_rows P_ ((struct window *)); |
187 | struct window *frame_row_to_window P_ ((struct window *, int)); | |
5f5c8ee5 | 188 | |
5f5c8ee5 GM |
189 | \f |
190 | /* Non-zero means don't pause redisplay for pending input. (This is | |
191 | for debugging and for a future implementation of EDT-like | |
192 | scrolling. */ | |
4588ec20 | 193 | |
5f5c8ee5 | 194 | int redisplay_dont_pause; |
45140e01 | 195 | |
d012c62b KS |
196 | /* Define PERIODIC_PREEMPTION_CHECKING to 1, if micro-second timers |
197 | are supported, so we can check for input during redisplay at | |
198 | regular intervals. */ | |
199 | #ifdef EMACS_HAS_USECS | |
200 | #define PERIODIC_PREEMPTION_CHECKING 1 | |
201 | #else | |
202 | #define PERIODIC_PREEMPTION_CHECKING 0 | |
203 | #endif | |
204 | ||
205 | #if PERIODIC_PREEMPTION_CHECKING | |
206 | ||
207 | /* If a number (float), check for user input every N seconds. */ | |
208 | ||
209 | Lisp_Object Vredisplay_preemption_period; | |
210 | ||
211 | /* Redisplay preemption timers. */ | |
212 | ||
213 | static EMACS_TIME preemption_period; | |
214 | static EMACS_TIME preemption_next_check; | |
215 | ||
216 | #endif | |
217 | ||
a41f8bed | 218 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 219 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 220 | |
502b9b64 | 221 | int frame_garbaged; |
4588ec20 | 222 | |
5f5c8ee5 | 223 | /* Nonzero means last display completed. Zero means it was preempted. */ |
4588ec20 JB |
224 | |
225 | int display_completed; | |
226 | ||
5f5c8ee5 GM |
227 | /* Lisp variable visible-bell; enables use of screen-flash instead of |
228 | audible bell. */ | |
4588ec20 JB |
229 | |
230 | int visible_bell; | |
231 | ||
502b9b64 | 232 | /* Invert the color of the whole frame, at a low level. */ |
4588ec20 JB |
233 | |
234 | int inverse_video; | |
235 | ||
236 | /* Line speed of the terminal. */ | |
237 | ||
31ade731 | 238 | EMACS_INT baud_rate; |
4588ec20 | 239 | |
5f5c8ee5 | 240 | /* Either nil or a symbol naming the window system under which Emacs |
2246281f | 241 | creates the first frame. */ |
4588ec20 | 242 | |
2246281f | 243 | Lisp_Object Vinitial_window_system; |
4588ec20 JB |
244 | |
245 | /* Version number of X windows: 10, 11 or nil. */ | |
5f5c8ee5 | 246 | |
4588ec20 JB |
247 | Lisp_Object Vwindow_system_version; |
248 | ||
5f5c8ee5 GM |
249 | /* Vector of glyph definitions. Indexed by glyph number, the contents |
250 | are a string which is how to output the glyph. | |
4588ec20 JB |
251 | |
252 | If Vglyph_table is nil, a glyph is output by using its low 8 bits | |
5f5c8ee5 GM |
253 | as a character code. |
254 | ||
255 | This is an obsolete feature that is no longer used. The variable | |
256 | is retained for compatibility. */ | |
4588ec20 JB |
257 | |
258 | Lisp_Object Vglyph_table; | |
259 | ||
260 | /* Display table to use for vectors that don't specify their own. */ | |
261 | ||
262 | Lisp_Object Vstandard_display_table; | |
263 | ||
5f5c8ee5 | 264 | /* Nonzero means reading single-character input with prompt so put |
153a073c | 265 | cursor on mini-buffer after the prompt. Positive means at end of |
5f5c8ee5 GM |
266 | text in echo area; negative means at beginning of line. */ |
267 | ||
4588ec20 | 268 | int cursor_in_echo_area; |
9cda4f7c | 269 | |
e7067d00 | 270 | Lisp_Object Qdisplay_table, Qredisplay_dont_pause; |
5f5c8ee5 | 271 | |
4588ec20 | 272 | \f |
5f5c8ee5 | 273 | /* The currently selected frame. In a single-frame version, this |
91fb7e1b | 274 | variable always equals the_only_frame. */ |
4588ec20 | 275 | |
91fb7e1b | 276 | Lisp_Object selected_frame; |
4588ec20 | 277 | |
5f5c8ee5 | 278 | /* A frame which is not just a mini-buffer, or 0 if there are no such |
502b9b64 | 279 | frames. This is usually the most recent such frame that was |
87485d6f MW |
280 | selected. In a single-frame version, this variable always holds |
281 | the address of the_only_frame. */ | |
4588ec20 | 282 | |
5f5c8ee5 | 283 | struct frame *last_nonminibuf_frame; |
d52bad65 | 284 | |
5f5c8ee5 | 285 | /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 286 | |
5f5c8ee5 | 287 | int delayed_size_change; |
4588ec20 | 288 | |
5f5c8ee5 | 289 | /* 1 means glyph initialization has been completed at startup. */ |
4588ec20 | 290 | |
5f5c8ee5 | 291 | static int glyphs_initialized_initially_p; |
4588ec20 | 292 | |
5f5c8ee5 | 293 | /* Updated window if != 0. Set by update_window. */ |
4588ec20 | 294 | |
5f5c8ee5 | 295 | struct window *updated_window; |
4588ec20 | 296 | |
5f5c8ee5 | 297 | /* Glyph row updated in update_window_line, and area that is updated. */ |
4588ec20 | 298 | |
5f5c8ee5 GM |
299 | struct glyph_row *updated_row; |
300 | int updated_area; | |
4588ec20 | 301 | |
5f5c8ee5 | 302 | /* A glyph for a space. */ |
4588ec20 | 303 | |
5f5c8ee5 | 304 | struct glyph space_glyph; |
4588ec20 | 305 | |
5f5c8ee5 GM |
306 | /* Non-zero means update has been performed directly, so that there's |
307 | no need for redisplay_internal to do much work. Set by | |
308 | direct_output_for_insert. */ | |
4588ec20 | 309 | |
5f5c8ee5 | 310 | int redisplay_performed_directly_p; |
4588ec20 | 311 | |
5f5c8ee5 GM |
312 | /* Counts of allocated structures. These counts serve to diagnose |
313 | memory leaks and double frees. */ | |
4588ec20 | 314 | |
5f5c8ee5 GM |
315 | int glyph_matrix_count; |
316 | int glyph_pool_count; | |
4588ec20 | 317 | |
5f5c8ee5 GM |
318 | /* If non-null, the frame whose frame matrices are manipulated. If |
319 | null, window matrices are worked on. */ | |
4588ec20 | 320 | |
5f5c8ee5 | 321 | static struct frame *frame_matrix_frame; |
4588ec20 | 322 | |
5f5c8ee5 GM |
323 | /* Non-zero means that fonts have been loaded since the last glyph |
324 | matrix adjustments. Redisplay must stop, and glyph matrices must | |
325 | be adjusted when this flag becomes non-zero during display. The | |
326 | reason fonts can be loaded so late is that fonts of fontsets are | |
327 | loaded on demand. */ | |
836d2cde | 328 | |
5f5c8ee5 | 329 | int fonts_changed_p; |
836d2cde | 330 | |
177c0ea7 | 331 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 332 | This may only be used for terminal frames. */ |
836d2cde | 333 | |
5f5c8ee5 | 334 | #if GLYPH_DEBUG |
4588ec20 | 335 | |
5f5c8ee5 GM |
336 | static int window_to_frame_vpos P_ ((struct window *, int)); |
337 | static int window_to_frame_hpos P_ ((struct window *, int)); | |
338 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) | |
339 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 340 | |
9b0e97aa GM |
341 | /* One element of the ring buffer containing redisplay history |
342 | information. */ | |
343 | ||
344 | struct redisplay_history | |
345 | { | |
346 | char trace[512 + 100]; | |
347 | }; | |
348 | ||
349 | /* The size of the history buffer. */ | |
350 | ||
351 | #define REDISPLAY_HISTORY_SIZE 30 | |
352 | ||
353 | /* The redisplay history buffer. */ | |
354 | ||
355 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
356 | ||
357 | /* Next free entry in redisplay_history. */ | |
358 | ||
359 | static int history_idx; | |
360 | ||
361 | /* A tick that's incremented each time something is added to the | |
362 | history. */ | |
363 | ||
364 | static unsigned history_tick; | |
365 | ||
366 | static void add_frame_display_history P_ ((struct frame *, int)); | |
367 | static void add_window_display_history P_ ((struct window *, char *, int)); | |
6a8aec41 | 368 | \f |
9b0e97aa GM |
369 | /* Add to the redisplay history how window W has been displayed. |
370 | MSG is a trace containing the information how W's glyph matrix | |
153a073c | 371 | has been constructed. PAUSED_P non-zero means that the update |
9b0e97aa GM |
372 | has been interrupted for pending input. */ |
373 | ||
374 | static void | |
375 | add_window_display_history (w, msg, paused_p) | |
376 | struct window *w; | |
377 | char *msg; | |
378 | int paused_p; | |
379 | { | |
380 | char *buf; | |
177c0ea7 | 381 | |
9b0e97aa GM |
382 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
383 | history_idx = 0; | |
384 | buf = redisplay_history[history_idx].trace; | |
385 | ++history_idx; | |
177c0ea7 | 386 | |
9b0e97aa GM |
387 | sprintf (buf, "%d: window %p (`%s')%s\n", |
388 | history_tick++, | |
389 | w, | |
390 | ((BUFFERP (w->buffer) | |
391 | && STRINGP (XBUFFER (w->buffer)->name)) | |
d5db4077 | 392 | ? (char *) SDATA (XBUFFER (w->buffer)->name) |
9b0e97aa GM |
393 | : "???"), |
394 | paused_p ? " ***paused***" : ""); | |
395 | strcat (buf, msg); | |
396 | } | |
397 | ||
398 | ||
399 | /* Add to the redisplay history that frame F has been displayed. | |
400 | PAUSED_P non-zero means that the update has been interrupted for | |
401 | pending input. */ | |
402 | ||
403 | static void | |
404 | add_frame_display_history (f, paused_p) | |
405 | struct frame *f; | |
406 | int paused_p; | |
407 | { | |
408 | char *buf; | |
177c0ea7 | 409 | |
9b0e97aa GM |
410 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
411 | history_idx = 0; | |
412 | buf = redisplay_history[history_idx].trace; | |
413 | ++history_idx; | |
177c0ea7 | 414 | |
9b0e97aa GM |
415 | sprintf (buf, "%d: update frame %p%s", |
416 | history_tick++, | |
417 | f, paused_p ? " ***paused***" : ""); | |
418 | } | |
419 | ||
420 | ||
421 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, | |
422 | Sdump_redisplay_history, 0, 0, "", | |
7ee72033 MB |
423 | doc: /* Dump redisplay history to stderr. */) |
424 | () | |
9b0e97aa GM |
425 | { |
426 | int i; | |
427 | ||
428 | for (i = history_idx - 1; i != history_idx; --i) | |
429 | { | |
430 | if (i < 0) | |
431 | i = REDISPLAY_HISTORY_SIZE - 1; | |
432 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
433 | } | |
434 | ||
435 | return Qnil; | |
436 | } | |
437 | ||
438 | ||
5f5c8ee5 | 439 | #else /* GLYPH_DEBUG == 0 */ |
4588ec20 | 440 | |
7df02016 KS |
441 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
442 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 443 | |
5f5c8ee5 | 444 | #endif /* GLYPH_DEBUG == 0 */ |
4588ec20 | 445 | |
4588ec20 | 446 | |
5f5c8ee5 GM |
447 | /* Like bcopy except never gets confused by overlap. Let this be the |
448 | first function defined in this file, or change emacs.c where the | |
449 | address of this function is used. */ | |
4588ec20 JB |
450 | |
451 | void | |
452 | safe_bcopy (from, to, size) | |
ea64076a KR |
453 | const char *from; |
454 | char *to; | |
4588ec20 JB |
455 | int size; |
456 | { | |
b5c685f4 | 457 | if (size <= 0 || from == to) |
4588ec20 JB |
458 | return; |
459 | ||
b5c685f4 JB |
460 | /* If the source and destination don't overlap, then bcopy can |
461 | handle it. If they do overlap, but the destination is lower in | |
462 | memory than the source, we'll assume bcopy can handle that. */ | |
463 | if (to < from || from + size <= to) | |
464 | bcopy (from, to, size); | |
465 | ||
466 | /* Otherwise, we'll copy from the end. */ | |
467 | else | |
4588ec20 | 468 | { |
ea64076a | 469 | register const char *endf = from + size; |
b5c685f4 | 470 | register char *endt = to + size; |
4588ec20 JB |
471 | |
472 | /* If TO - FROM is large, then we should break the copy into | |
473 | nonoverlapping chunks of TO - FROM bytes each. However, if | |
474 | TO - FROM is small, then the bcopy function call overhead | |
475 | makes this not worth it. The crossover point could be about | |
b5c685f4 JB |
476 | anywhere. Since I don't think the obvious copy loop is too |
477 | bad, I'm trying to err in its favor. */ | |
4588ec20 JB |
478 | if (to - from < 64) |
479 | { | |
480 | do | |
481 | *--endt = *--endf; | |
482 | while (endf != from); | |
483 | } | |
484 | else | |
485 | { | |
b5c685f4 | 486 | for (;;) |
4588ec20 JB |
487 | { |
488 | endt -= (to - from); | |
489 | endf -= (to - from); | |
490 | ||
b5c685f4 JB |
491 | if (endt < to) |
492 | break; | |
493 | ||
4588ec20 JB |
494 | bcopy (endf, endt, to - from); |
495 | } | |
b5c685f4 JB |
496 | |
497 | /* If SIZE wasn't a multiple of TO - FROM, there will be a | |
5f5c8ee5 GM |
498 | little left over. The amount left over is (endt + (to - |
499 | from)) - to, which is endt - from. */ | |
4588ec20 JB |
500 | bcopy (from, to, endt - from); |
501 | } | |
502 | } | |
177c0ea7 | 503 | } |
4588ec20 | 504 | |
4588ec20 | 505 | |
5f5c8ee5 GM |
506 | \f |
507 | /*********************************************************************** | |
508 | Glyph Matrices | |
509 | ***********************************************************************/ | |
510 | ||
511 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
512 | pool from which memory for the matrix should be allocated, or null | |
513 | for window-based redisplay where no glyph pools are used. The | |
514 | member `pool' of the glyph matrix structure returned is set to | |
515 | POOL, the structure is otherwise zeroed. */ | |
516 | ||
517 | struct glyph_matrix * | |
518 | new_glyph_matrix (pool) | |
519 | struct glyph_pool *pool; | |
4588ec20 | 520 | { |
5f5c8ee5 GM |
521 | struct glyph_matrix *result; |
522 | ||
523 | /* Allocate and clear. */ | |
524 | result = (struct glyph_matrix *) xmalloc (sizeof *result); | |
525 | bzero (result, sizeof *result); | |
4588ec20 | 526 | |
5f5c8ee5 GM |
527 | /* Increment number of allocated matrices. This count is used |
528 | to detect memory leaks. */ | |
529 | ++glyph_matrix_count; | |
4588ec20 | 530 | |
5f5c8ee5 GM |
531 | /* Set pool and return. */ |
532 | result->pool = pool; | |
533 | return result; | |
4588ec20 JB |
534 | } |
535 | ||
4588ec20 | 536 | |
5f5c8ee5 GM |
537 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
538 | ||
539 | The global counter glyph_matrix_count is decremented when a matrix | |
540 | is freed. If the count gets negative, more structures were freed | |
541 | than allocated, i.e. one matrix was freed more than once or a bogus | |
542 | pointer was passed to this function. | |
177c0ea7 | 543 | |
5f5c8ee5 GM |
544 | If MATRIX->pool is null, this means that the matrix manages its own |
545 | glyph memory---this is done for matrices on X frames. Freeing the | |
546 | matrix also frees the glyph memory in this case. */ | |
547 | ||
548 | static void | |
549 | free_glyph_matrix (matrix) | |
550 | struct glyph_matrix *matrix; | |
4588ec20 | 551 | { |
5f5c8ee5 GM |
552 | if (matrix) |
553 | { | |
554 | int i; | |
555 | ||
556 | /* Detect the case that more matrices are freed than were | |
557 | allocated. */ | |
558 | if (--glyph_matrix_count < 0) | |
559 | abort (); | |
560 | ||
561 | /* Free glyph memory if MATRIX owns it. */ | |
562 | if (matrix->pool == NULL) | |
563 | for (i = 0; i < matrix->rows_allocated; ++i) | |
564 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 565 | |
5f5c8ee5 GM |
566 | /* Free row structures and the matrix itself. */ |
567 | xfree (matrix->rows); | |
568 | xfree (matrix); | |
569 | } | |
570 | } | |
4588ec20 | 571 | |
4588ec20 | 572 | |
5f5c8ee5 GM |
573 | /* Return the number of glyphs to reserve for a marginal area of |
574 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
575 | display line of window W. MARGIN gives the width of the marginal | |
576 | area in canonical character units. MARGIN should be an integer | |
577 | or a float. */ | |
578 | ||
579 | static int | |
580 | margin_glyphs_to_reserve (w, total_glyphs, margin) | |
581 | struct window *w; | |
582 | int total_glyphs; | |
583 | Lisp_Object margin; | |
584 | { | |
585 | int n; | |
4588ec20 | 586 | |
5f5c8ee5 | 587 | if (NUMBERP (margin)) |
4588ec20 | 588 | { |
7df02016 | 589 | int width = XFASTINT (w->total_cols); |
5f5c8ee5 GM |
590 | double d = max (0, XFLOATINT (margin)); |
591 | d = min (width / 2 - 1, d); | |
35ec832e | 592 | n = (int) ((double) total_glyphs / width * d); |
5f5c8ee5 GM |
593 | } |
594 | else | |
595 | n = 0; | |
596 | ||
597 | return n; | |
598 | } | |
599 | ||
4588ec20 | 600 | |
5f5c8ee5 GM |
601 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
602 | window sizes. | |
4588ec20 | 603 | |
5f5c8ee5 GM |
604 | W is null if the function is called for a frame glyph matrix. |
605 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
606 | indices of the first column and row of MATRIX within the frame | |
607 | matrix, if such a matrix exists. They are zero for purely | |
608 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 609 | |
5f5c8ee5 GM |
610 | In window-based redisplay, where no frame matrices exist, glyph |
611 | matrices manage their own glyph storage. Otherwise, they allocate | |
612 | storage from a common frame glyph pool which can be found in | |
613 | MATRIX->pool. | |
23b0200c | 614 | |
5f5c8ee5 GM |
615 | The reason for this memory management strategy is to avoid complete |
616 | frame redraws if possible. When we allocate from a common pool, a | |
617 | change of the location or size of a sub-matrix within the pool | |
618 | requires a complete redisplay of the frame because we cannot easily | |
619 | make sure that the current matrices of all windows still agree with | |
620 | what is displayed on the screen. While this is usually fast, it | |
621 | leads to screen flickering. */ | |
23b0200c | 622 | |
5f5c8ee5 GM |
623 | static void |
624 | adjust_glyph_matrix (w, matrix, x, y, dim) | |
625 | struct window *w; | |
626 | struct glyph_matrix *matrix; | |
627 | int x, y; | |
628 | struct dim dim; | |
629 | { | |
630 | int i; | |
631 | int new_rows; | |
632 | int marginal_areas_changed_p = 0; | |
045dee35 GM |
633 | int header_line_changed_p = 0; |
634 | int header_line_p = 0; | |
5f5c8ee5 | 635 | int left = -1, right = -1; |
7df02016 | 636 | int window_width = -1, window_height; |
5f5c8ee5 | 637 | |
e125a2e6 RS |
638 | /* See if W had a header line that has disappeared now, or vice versa. |
639 | Get W's size. */ | |
5f5c8ee5 GM |
640 | if (w) |
641 | { | |
e125a2e6 RS |
642 | window_box (w, -1, 0, 0, &window_width, &window_height); |
643 | ||
045dee35 GM |
644 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
645 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 646 | } |
045dee35 | 647 | matrix->header_line_p = header_line_p; |
23b0200c | 648 | |
e125a2e6 RS |
649 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
650 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
651 | haven't changed. This optimization is important because preserving |
652 | the matrix means preventing redisplay. */ | |
653 | if (matrix->pool == NULL) | |
654 | { | |
7df02016 KS |
655 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
656 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
5f5c8ee5 GM |
657 | xassert (left >= 0 && right >= 0); |
658 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs | |
659 | || right != matrix->right_margin_glyphs); | |
660 | ||
661 | if (!marginal_areas_changed_p | |
662 | && !fonts_changed_p | |
045dee35 | 663 | && !header_line_changed_p |
7df02016 KS |
664 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
665 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
666 | && matrix->window_height == window_height |
667 | && matrix->window_vscroll == w->vscroll | |
668 | && matrix->window_width == window_width) | |
669 | return; | |
670 | } | |
177c0ea7 | 671 | |
5f5c8ee5 GM |
672 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
673 | if (matrix->rows_allocated < dim.height) | |
674 | { | |
675 | int size = dim.height * sizeof (struct glyph_row); | |
676 | new_rows = dim.height - matrix->rows_allocated; | |
677 | matrix->rows = (struct glyph_row *) xrealloc (matrix->rows, size); | |
678 | bzero (matrix->rows + matrix->rows_allocated, | |
679 | new_rows * sizeof *matrix->rows); | |
680 | matrix->rows_allocated = dim.height; | |
681 | } | |
682 | else | |
683 | new_rows = 0; | |
60a8948a | 684 | |
5f5c8ee5 GM |
685 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
686 | on a frame not using window-based redisplay. Set up pointers for | |
687 | each row into the glyph pool. */ | |
688 | if (matrix->pool) | |
689 | { | |
690 | xassert (matrix->pool->glyphs); | |
177c0ea7 | 691 | |
5f5c8ee5 | 692 | if (w) |
60a8948a | 693 | { |
5f5c8ee5 | 694 | left = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 695 | w->left_margin_cols); |
5f5c8ee5 | 696 | right = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 697 | w->right_margin_cols); |
60a8948a | 698 | } |
5f5c8ee5 GM |
699 | else |
700 | left = right = 0; | |
177c0ea7 | 701 | |
5f5c8ee5 | 702 | for (i = 0; i < dim.height; ++i) |
60a8948a | 703 | { |
5f5c8ee5 | 704 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
705 | |
706 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
707 | = (matrix->pool->glyphs |
708 | + (y + i) * matrix->pool->ncolumns | |
709 | + x); | |
177c0ea7 | 710 | |
5f5c8ee5 GM |
711 | if (w == NULL |
712 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 713 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
714 | { |
715 | row->glyphs[TEXT_AREA] | |
716 | = row->glyphs[LEFT_MARGIN_AREA]; | |
717 | row->glyphs[RIGHT_MARGIN_AREA] | |
718 | = row->glyphs[TEXT_AREA] + dim.width; | |
719 | row->glyphs[LAST_AREA] | |
720 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
721 | } | |
722 | else | |
723 | { | |
724 | row->glyphs[TEXT_AREA] | |
725 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
726 | row->glyphs[RIGHT_MARGIN_AREA] | |
727 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
728 | row->glyphs[LAST_AREA] | |
729 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
730 | } | |
60a8948a | 731 | } |
177c0ea7 | 732 | |
5f5c8ee5 GM |
733 | matrix->left_margin_glyphs = left; |
734 | matrix->right_margin_glyphs = right; | |
735 | } | |
736 | else | |
737 | { | |
738 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
e125a2e6 RS |
739 | its own memory. It is a window matrix for window-based redisplay. |
740 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
741 | if (dim.width > matrix->matrix_w |
742 | || new_rows | |
045dee35 | 743 | || header_line_changed_p |
5f5c8ee5 | 744 | || marginal_areas_changed_p) |
4588ec20 | 745 | { |
5f5c8ee5 GM |
746 | struct glyph_row *row = matrix->rows; |
747 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 748 | |
5f5c8ee5 GM |
749 | while (row < end) |
750 | { | |
751 | row->glyphs[LEFT_MARGIN_AREA] | |
752 | = (struct glyph *) xrealloc (row->glyphs[LEFT_MARGIN_AREA], | |
753 | (dim.width | |
754 | * sizeof (struct glyph))); | |
177c0ea7 | 755 | |
5f5c8ee5 GM |
756 | /* The mode line never has marginal areas. */ |
757 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 758 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
759 | { |
760 | row->glyphs[TEXT_AREA] | |
761 | = row->glyphs[LEFT_MARGIN_AREA]; | |
762 | row->glyphs[RIGHT_MARGIN_AREA] | |
763 | = row->glyphs[TEXT_AREA] + dim.width; | |
764 | row->glyphs[LAST_AREA] | |
765 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
766 | } | |
767 | else | |
768 | { | |
769 | row->glyphs[TEXT_AREA] | |
770 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
771 | row->glyphs[RIGHT_MARGIN_AREA] | |
772 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
773 | row->glyphs[LAST_AREA] | |
774 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
775 | } | |
776 | ++row; | |
777 | } | |
4588ec20 JB |
778 | } |
779 | ||
5f5c8ee5 GM |
780 | xassert (left >= 0 && right >= 0); |
781 | matrix->left_margin_glyphs = left; | |
782 | matrix->right_margin_glyphs = right; | |
783 | } | |
177c0ea7 | 784 | |
5f5c8ee5 GM |
785 | /* Number of rows to be used by MATRIX. */ |
786 | matrix->nrows = dim.height; | |
3ed36514 | 787 | xassert (matrix->nrows >= 0); |
5f5c8ee5 | 788 | |
b7b20fbd | 789 | if (w) |
5f5c8ee5 | 790 | { |
b7b20fbd | 791 | if (matrix == w->current_matrix) |
4588ec20 | 792 | { |
b7b20fbd GM |
793 | /* Mark rows in a current matrix of a window as not having |
794 | valid contents. It's important to not do this for | |
795 | desired matrices. When Emacs starts, it may already be | |
796 | building desired matrices when this function runs. */ | |
797 | if (window_width < 0) | |
798 | window_width = window_box_width (w, -1); | |
177c0ea7 | 799 | |
b7b20fbd GM |
800 | /* Optimize the case that only the height has changed (C-x 2, |
801 | upper window). Invalidate all rows that are no longer part | |
802 | of the window. */ | |
803 | if (!marginal_areas_changed_p | |
73d75a62 GM |
804 | && !header_line_changed_p |
805 | && new_rows == 0 | |
806 | && dim.width == matrix->matrix_w | |
7df02016 KS |
807 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
808 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 809 | && matrix->window_width == window_width) |
b7b20fbd | 810 | { |
dd42b31a GM |
811 | /* Find the last row in the window. */ |
812 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
813 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
814 | { | |
26447967 | 815 | ++i; |
dd42b31a GM |
816 | break; |
817 | } | |
b7b20fbd GM |
818 | |
819 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 820 | are invalidated below. */ |
b7b20fbd GM |
821 | if (INTEGERP (w->window_end_vpos) |
822 | && XFASTINT (w->window_end_vpos) >= i) | |
823 | w->window_end_valid = Qnil; | |
177c0ea7 | 824 | |
b7b20fbd GM |
825 | while (i < matrix->nrows) |
826 | matrix->rows[i++].enabled_p = 0; | |
827 | } | |
828 | else | |
829 | { | |
830 | for (i = 0; i < matrix->nrows; ++i) | |
831 | matrix->rows[i].enabled_p = 0; | |
832 | } | |
5f5c8ee5 | 833 | } |
b7b20fbd | 834 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 835 | { |
b7b20fbd GM |
836 | /* Rows in desired matrices always have to be cleared; |
837 | redisplay expects this is the case when it runs, so it | |
838 | had better be the case when we adjust matrices between | |
839 | redisplays. */ | |
5f5c8ee5 GM |
840 | for (i = 0; i < matrix->nrows; ++i) |
841 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 842 | } |
4588ec20 | 843 | } |
177c0ea7 JB |
844 | |
845 | ||
5f5c8ee5 GM |
846 | /* Remember last values to be able to optimize frame redraws. */ |
847 | matrix->matrix_x = x; | |
848 | matrix->matrix_y = y; | |
849 | matrix->matrix_w = dim.width; | |
850 | matrix->matrix_h = dim.height; | |
851 | ||
852 | /* Record the top y location and height of W at the time the matrix | |
853 | was last adjusted. This is used to optimize redisplay above. */ | |
854 | if (w) | |
4588ec20 | 855 | { |
7df02016 KS |
856 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
857 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
858 | matrix->window_height = window_height; |
859 | matrix->window_width = window_width; | |
860 | matrix->window_vscroll = w->vscroll; | |
861 | } | |
862 | } | |
4588ec20 | 863 | |
4588ec20 | 864 | |
5f5c8ee5 GM |
865 | /* Reverse the contents of rows in MATRIX between START and END. The |
866 | contents of the row at END - 1 end up at START, END - 2 at START + | |
867 | 1 etc. This is part of the implementation of rotate_matrix (see | |
868 | below). */ | |
d52bad65 | 869 | |
5f5c8ee5 GM |
870 | static void |
871 | reverse_rows (matrix, start, end) | |
872 | struct glyph_matrix *matrix; | |
873 | int start, end; | |
874 | { | |
875 | int i, j; | |
23b0200c | 876 | |
5f5c8ee5 GM |
877 | for (i = start, j = end - 1; i < j; ++i, --j) |
878 | { | |
879 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
880 | initialization. */ | |
881 | struct glyph_row temp; | |
882 | temp = matrix->rows[i]; | |
883 | matrix->rows[i] = matrix->rows[j]; | |
884 | matrix->rows[j] = temp; | |
885 | } | |
886 | } | |
23b0200c | 887 | |
23b0200c | 888 | |
5f5c8ee5 GM |
889 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
890 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
891 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
892 | row structures are moved around). | |
60a8948a | 893 | |
5f5c8ee5 GM |
894 | The algorithm used for rotating the vector was, I believe, first |
895 | described by Kernighan. See the vector R as consisting of two | |
896 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
897 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
898 | and reverse the result to get (ArBr)r which is BA. Similar for | |
899 | rotating right. */ | |
900 | ||
901 | void | |
902 | rotate_matrix (matrix, first, last, by) | |
903 | struct glyph_matrix *matrix; | |
904 | int first, last, by; | |
905 | { | |
906 | if (by < 0) | |
907 | { | |
908 | /* Up (rotate left, i.e. towards lower indices). */ | |
909 | by = -by; | |
910 | reverse_rows (matrix, first, first + by); | |
911 | reverse_rows (matrix, first + by, last); | |
912 | reverse_rows (matrix, first, last); | |
913 | } | |
914 | else if (by > 0) | |
915 | { | |
916 | /* Down (rotate right, i.e. towards higher indices). */ | |
917 | reverse_rows (matrix, last - by, last); | |
918 | reverse_rows (matrix, first, last - by); | |
919 | reverse_rows (matrix, first, last); | |
920 | } | |
921 | } | |
922 | ||
923 | ||
924 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
925 | with indices START <= index < END. Increment positions by DELTA/ | |
926 | DELTA_BYTES. */ | |
927 | ||
928 | void | |
86c11ba1 | 929 | increment_matrix_positions (matrix, start, end, delta, delta_bytes) |
5f5c8ee5 GM |
930 | struct glyph_matrix *matrix; |
931 | int start, end, delta, delta_bytes; | |
932 | { | |
933 | /* Check that START and END are reasonable values. */ | |
934 | xassert (start >= 0 && start <= matrix->nrows); | |
935 | xassert (end >= 0 && end <= matrix->nrows); | |
936 | xassert (start <= end); | |
937 | ||
938 | for (; start < end; ++start) | |
86c11ba1 | 939 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
940 | } |
941 | ||
942 | ||
943 | /* Enable a range of rows in glyph matrix MATRIX. START and END are | |
944 | the row indices of the first and last + 1 row to enable. If | |
945 | ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */ | |
946 | ||
947 | void | |
948 | enable_glyph_matrix_rows (matrix, start, end, enabled_p) | |
949 | struct glyph_matrix *matrix; | |
950 | int start, end; | |
951 | int enabled_p; | |
952 | { | |
3ed36514 GM |
953 | xassert (start <= end); |
954 | xassert (start >= 0 && start < matrix->nrows); | |
955 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 956 | |
5f5c8ee5 GM |
957 | for (; start < end; ++start) |
958 | matrix->rows[start].enabled_p = enabled_p != 0; | |
959 | } | |
960 | ||
961 | ||
962 | /* Clear MATRIX. | |
963 | ||
964 | This empties all rows in MATRIX by setting the enabled_p flag for | |
965 | all rows of the matrix to zero. The function prepare_desired_row | |
966 | will eventually really clear a row when it sees one with a zero | |
967 | enabled_p flag. | |
968 | ||
969 | Resets update hints to defaults value. The only update hint | |
970 | currently present is the flag MATRIX->no_scrolling_p. */ | |
971 | ||
972 | void | |
973 | clear_glyph_matrix (matrix) | |
974 | struct glyph_matrix *matrix; | |
975 | { | |
976 | if (matrix) | |
977 | { | |
978 | enable_glyph_matrix_rows (matrix, 0, matrix->nrows, 0); | |
979 | matrix->no_scrolling_p = 0; | |
980 | } | |
981 | } | |
177c0ea7 | 982 | |
5f5c8ee5 GM |
983 | |
984 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
985 | Increment y-positions in glyph rows between START and END by DY, | |
986 | and recompute their visible height. */ | |
987 | ||
988 | void | |
989 | shift_glyph_matrix (w, matrix, start, end, dy) | |
990 | struct window *w; | |
991 | struct glyph_matrix *matrix; | |
992 | int start, end, dy; | |
993 | { | |
994 | int min_y, max_y; | |
177c0ea7 | 995 | |
5f5c8ee5 GM |
996 | xassert (start <= end); |
997 | xassert (start >= 0 && start < matrix->nrows); | |
998 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 999 | |
7df02016 KS |
1000 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
1001 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 1002 | |
5f5c8ee5 GM |
1003 | for (; start < end; ++start) |
1004 | { | |
1005 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 1006 | |
5f5c8ee5 | 1007 | row->y += dy; |
d6c747a4 | 1008 | row->visible_height = row->height; |
177c0ea7 | 1009 | |
5f5c8ee5 | 1010 | if (row->y < min_y) |
d6c747a4 GM |
1011 | row->visible_height -= min_y - row->y; |
1012 | if (row->y + row->height > max_y) | |
1013 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
1014 | } |
1015 | } | |
1016 | ||
1017 | ||
1018 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
1019 | invalid is done by setting enabled_p to zero for all rows in a | |
1020 | current matrix. */ | |
1021 | ||
1022 | void | |
1023 | clear_current_matrices (f) | |
1024 | register struct frame *f; | |
1025 | { | |
1026 | /* Clear frame current matrix, if we have one. */ | |
1027 | if (f->current_matrix) | |
1028 | clear_glyph_matrix (f->current_matrix); | |
1029 | ||
1030 | /* Clear the matrix of the menu bar window, if such a window exists. | |
1031 | The menu bar window is currently used to display menus on X when | |
1032 | no toolkit support is compiled in. */ | |
1033 | if (WINDOWP (f->menu_bar_window)) | |
1034 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
1035 | ||
9ea173e8 GM |
1036 | /* Clear the matrix of the tool-bar window, if any. */ |
1037 | if (WINDOWP (f->tool_bar_window)) | |
1038 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
5f5c8ee5 GM |
1039 | |
1040 | /* Clear current window matrices. */ | |
1041 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
1042 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); | |
1043 | } | |
1044 | ||
1045 | ||
1046 | /* Clear out all display lines of F for a coming redisplay. */ | |
1047 | ||
1048 | void | |
1049 | clear_desired_matrices (f) | |
1050 | register struct frame *f; | |
1051 | { | |
1052 | if (f->desired_matrix) | |
1053 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 1054 | |
5f5c8ee5 GM |
1055 | if (WINDOWP (f->menu_bar_window)) |
1056 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
1057 | ||
9ea173e8 GM |
1058 | if (WINDOWP (f->tool_bar_window)) |
1059 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
5f5c8ee5 GM |
1060 | |
1061 | /* Do it for window matrices. */ | |
1062 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
1063 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
1064 | } | |
1065 | ||
1066 | ||
1067 | /* Clear matrices in window tree rooted in W. If DESIRED_P is | |
1068 | non-zero clear desired matrices, otherwise clear current matrices. */ | |
1069 | ||
1070 | static void | |
1071 | clear_window_matrices (w, desired_p) | |
1072 | struct window *w; | |
1073 | int desired_p; | |
1074 | { | |
1075 | while (w) | |
1076 | { | |
1077 | if (!NILP (w->hchild)) | |
1078 | { | |
1079 | xassert (WINDOWP (w->hchild)); | |
1080 | clear_window_matrices (XWINDOW (w->hchild), desired_p); | |
1081 | } | |
1082 | else if (!NILP (w->vchild)) | |
1083 | { | |
1084 | xassert (WINDOWP (w->vchild)); | |
1085 | clear_window_matrices (XWINDOW (w->vchild), desired_p); | |
1086 | } | |
1087 | else | |
1088 | { | |
1089 | if (desired_p) | |
1090 | clear_glyph_matrix (w->desired_matrix); | |
1091 | else | |
1092 | { | |
1093 | clear_glyph_matrix (w->current_matrix); | |
1094 | w->window_end_valid = Qnil; | |
1095 | } | |
1096 | } | |
1097 | ||
1098 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
1099 | } | |
1100 | } | |
1101 | ||
1102 | ||
1103 | \f | |
1104 | /*********************************************************************** | |
1105 | Glyph Rows | |
1106 | ||
1107 | See dispextern.h for an overall explanation of glyph rows. | |
1108 | ***********************************************************************/ | |
1109 | ||
1110 | /* Clear glyph row ROW. Do it in a way that makes it robust against | |
1111 | changes in the glyph_row structure, i.e. addition or removal of | |
1112 | structure members. */ | |
1113 | ||
2cca872d KH |
1114 | static struct glyph_row null_row; |
1115 | ||
5f5c8ee5 GM |
1116 | void |
1117 | clear_glyph_row (row) | |
1118 | struct glyph_row *row; | |
1119 | { | |
1120 | struct glyph *p[1 + LAST_AREA]; | |
5f5c8ee5 GM |
1121 | |
1122 | /* Save pointers. */ | |
1123 | p[LEFT_MARGIN_AREA] = row->glyphs[LEFT_MARGIN_AREA]; | |
1124 | p[TEXT_AREA] = row->glyphs[TEXT_AREA]; | |
1125 | p[RIGHT_MARGIN_AREA] = row->glyphs[RIGHT_MARGIN_AREA]; | |
1126 | p[LAST_AREA] = row->glyphs[LAST_AREA]; | |
1127 | ||
1128 | /* Clear. */ | |
1129 | *row = null_row; | |
1130 | ||
1131 | /* Restore pointers. */ | |
1132 | row->glyphs[LEFT_MARGIN_AREA] = p[LEFT_MARGIN_AREA]; | |
1133 | row->glyphs[TEXT_AREA] = p[TEXT_AREA]; | |
1134 | row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA]; | |
1135 | row->glyphs[LAST_AREA] = p[LAST_AREA]; | |
45560b1a GM |
1136 | |
1137 | #if 0 /* At some point, some bit-fields of struct glyph were not set, | |
1138 | which made glyphs unequal when compared with GLYPH_EQUAL_P. | |
1139 | Redisplay outputs such glyphs, and flickering effects were | |
1140 | the result. This also depended on the contents of memory | |
1141 | returned by xmalloc. If flickering happens again, activate | |
153a073c | 1142 | the code below. If the flickering is gone with that, chances |
45560b1a GM |
1143 | are that the flickering has the same reason as here. */ |
1144 | bzero (p[0], (char *) p[LAST_AREA] - (char *) p[0]); | |
1145 | #endif | |
5f5c8ee5 GM |
1146 | } |
1147 | ||
1148 | ||
1149 | /* Make ROW an empty, enabled row of canonical character height, | |
1150 | in window W starting at y-position Y. */ | |
1151 | ||
1152 | void | |
1153 | blank_row (w, row, y) | |
1154 | struct window *w; | |
1155 | struct glyph_row *row; | |
1156 | int y; | |
1157 | { | |
1158 | int min_y, max_y; | |
177c0ea7 | 1159 | |
7df02016 KS |
1160 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
1161 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 1162 | |
5f5c8ee5 GM |
1163 | clear_glyph_row (row); |
1164 | row->y = y; | |
408f5064 | 1165 | row->ascent = row->phys_ascent = 0; |
7df02016 | 1166 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 1167 | row->visible_height = row->height; |
177c0ea7 | 1168 | |
5f5c8ee5 | 1169 | if (row->y < min_y) |
d6c747a4 GM |
1170 | row->visible_height -= min_y - row->y; |
1171 | if (row->y + row->height > max_y) | |
1172 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
1173 | |
1174 | row->enabled_p = 1; | |
1175 | } | |
1176 | ||
1177 | ||
1178 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
1179 | are the amounts by which to change positions. Note that the first | |
1180 | glyph of the text area of a row can have a buffer position even if | |
1181 | the used count of the text area is zero. Such rows display line | |
1182 | ends. */ | |
1183 | ||
1184 | void | |
86c11ba1 | 1185 | increment_row_positions (row, delta, delta_bytes) |
5f5c8ee5 GM |
1186 | struct glyph_row *row; |
1187 | int delta, delta_bytes; | |
1188 | { | |
1189 | int area, i; | |
1190 | ||
1191 | /* Increment start and end positions. */ | |
1192 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
1193 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
1194 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
1195 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
1196 | ||
5cacdcfd KS |
1197 | if (!row->enabled_p) |
1198 | return; | |
1199 | ||
5f5c8ee5 GM |
1200 | /* Increment positions in glyphs. */ |
1201 | for (area = 0; area < LAST_AREA; ++area) | |
1202 | for (i = 0; i < row->used[area]; ++i) | |
1203 | if (BUFFERP (row->glyphs[area][i].object) | |
1204 | && row->glyphs[area][i].charpos > 0) | |
1205 | row->glyphs[area][i].charpos += delta; | |
1206 | ||
1207 | /* Capture the case of rows displaying a line end. */ | |
1208 | if (row->used[TEXT_AREA] == 0 | |
1209 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1210 | row->glyphs[TEXT_AREA]->charpos += delta; | |
1211 | } | |
1212 | ||
1213 | ||
9af3e742 | 1214 | #if 0 |
5f5c8ee5 GM |
1215 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
1216 | contents, i.e. glyph structure contents are exchanged between A and | |
1217 | B without changing glyph pointers in A and B. */ | |
1218 | ||
1219 | static void | |
1220 | swap_glyphs_in_rows (a, b) | |
1221 | struct glyph_row *a, *b; | |
1222 | { | |
1223 | int area; | |
1224 | ||
1225 | for (area = 0; area < LAST_AREA; ++area) | |
1226 | { | |
1227 | /* Number of glyphs to swap. */ | |
1228 | int max_used = max (a->used[area], b->used[area]); | |
1229 | ||
1230 | /* Start of glyphs in area of row A. */ | |
1231 | struct glyph *glyph_a = a->glyphs[area]; | |
1232 | ||
1233 | /* End + 1 of glyphs in area of row A. */ | |
1234 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
1235 | ||
1236 | /* Start of glyphs in area of row B. */ | |
1237 | struct glyph *glyph_b = b->glyphs[area]; | |
1238 | ||
1239 | while (glyph_a < glyph_a_end) | |
1240 | { | |
1241 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
1242 | initialization. */ | |
1243 | struct glyph temp; | |
1244 | temp = *glyph_a; | |
1245 | *glyph_a = *glyph_b; | |
1246 | *glyph_b = temp; | |
1247 | ++glyph_a; | |
1248 | ++glyph_b; | |
1249 | } | |
1250 | } | |
1251 | } | |
1252 | ||
9af3e742 | 1253 | #endif /* 0 */ |
5f5c8ee5 GM |
1254 | |
1255 | /* Exchange pointers to glyph memory between glyph rows A and B. */ | |
1256 | ||
1257 | static INLINE void | |
1258 | swap_glyph_pointers (a, b) | |
1259 | struct glyph_row *a, *b; | |
1260 | { | |
1261 | int i; | |
1262 | for (i = 0; i < LAST_AREA + 1; ++i) | |
1263 | { | |
1264 | struct glyph *temp = a->glyphs[i]; | |
1265 | a->glyphs[i] = b->glyphs[i]; | |
1266 | b->glyphs[i] = temp; | |
1267 | } | |
1268 | } | |
1269 | ||
1270 | ||
1271 | /* Copy glyph row structure FROM to glyph row structure TO, except | |
1272 | that glyph pointers in the structures are left unchanged. */ | |
1273 | ||
1274 | INLINE void | |
1275 | copy_row_except_pointers (to, from) | |
1276 | struct glyph_row *to, *from; | |
1277 | { | |
1278 | struct glyph *pointers[1 + LAST_AREA]; | |
1279 | ||
1280 | /* Save glyph pointers of TO. */ | |
1281 | bcopy (to->glyphs, pointers, sizeof to->glyphs); | |
1282 | ||
1283 | /* Do a structure assignment. */ | |
1284 | *to = *from; | |
1285 | ||
1286 | /* Restore original pointers of TO. */ | |
1287 | bcopy (pointers, to->glyphs, sizeof to->glyphs); | |
1288 | } | |
1289 | ||
1290 | ||
1291 | /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in | |
1292 | TO and FROM are left unchanged. Glyph contents are copied from the | |
1293 | glyph memory of FROM to the glyph memory of TO. Increment buffer | |
1294 | positions in row TO by DELTA/ DELTA_BYTES. */ | |
1295 | ||
1296 | void | |
1297 | copy_glyph_row_contents (to, from, delta, delta_bytes) | |
1298 | struct glyph_row *to, *from; | |
1299 | int delta, delta_bytes; | |
1300 | { | |
1301 | int area; | |
1302 | ||
1303 | /* This is like a structure assignment TO = FROM, except that | |
1304 | glyph pointers in the rows are left unchanged. */ | |
1305 | copy_row_except_pointers (to, from); | |
1306 | ||
1307 | /* Copy glyphs from FROM to TO. */ | |
1308 | for (area = 0; area < LAST_AREA; ++area) | |
1309 | if (from->used[area]) | |
177c0ea7 | 1310 | bcopy (from->glyphs[area], to->glyphs[area], |
5f5c8ee5 GM |
1311 | from->used[area] * sizeof (struct glyph)); |
1312 | ||
1313 | /* Increment buffer positions in TO by DELTA. */ | |
86c11ba1 | 1314 | increment_row_positions (to, delta, delta_bytes); |
5f5c8ee5 GM |
1315 | } |
1316 | ||
1317 | ||
1318 | /* Assign glyph row FROM to glyph row TO. This works like a structure | |
1319 | assignment TO = FROM, except that glyph pointers are not copied but | |
1320 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1321 | a memory leak. */ | |
1322 | ||
1323 | static INLINE void | |
1324 | assign_row (to, from) | |
1325 | struct glyph_row *to, *from; | |
1326 | { | |
1327 | swap_glyph_pointers (to, from); | |
1328 | copy_row_except_pointers (to, from); | |
1329 | } | |
1330 | ||
1331 | ||
1332 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1333 | a row in a window matrix, is a slice of the glyph memory of the | |
1334 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
1335 | is non-zero if the glyph memory of WINDOW_ROW is part of the glyph | |
1336 | memory of FRAME_ROW. */ | |
1337 | ||
2d5912c1 | 1338 | #if GLYPH_DEBUG |
9339e87f | 1339 | |
5f5c8ee5 GM |
1340 | static int |
1341 | glyph_row_slice_p (window_row, frame_row) | |
1342 | struct glyph_row *window_row, *frame_row; | |
1343 | { | |
1344 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1345 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1346 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1347 | ||
1348 | return (frame_glyph_start <= window_glyph_start | |
1349 | && window_glyph_start < frame_glyph_end); | |
1350 | } | |
1351 | ||
9339e87f | 1352 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1353 | |
9af3e742 GM |
1354 | #if 0 |
1355 | ||
5f5c8ee5 GM |
1356 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1357 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1358 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1359 | ||
1360 | static struct glyph_row * | |
1361 | find_glyph_row_slice (window_matrix, frame_matrix, row) | |
1362 | struct glyph_matrix *window_matrix, *frame_matrix; | |
1363 | int row; | |
1364 | { | |
1365 | int i; | |
1366 | ||
1367 | xassert (row >= 0 && row < frame_matrix->nrows); | |
1368 | ||
1369 | for (i = 0; i < window_matrix->nrows; ++i) | |
1370 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1371 | frame_matrix->rows + row)) | |
1372 | break; | |
1373 | ||
1374 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1375 | } | |
1376 | ||
9af3e742 | 1377 | #endif /* 0 */ |
5f5c8ee5 GM |
1378 | |
1379 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1380 | i.e. they are only marked as to be cleared by setting their | |
1381 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1382 | call to this function really clears it. */ | |
1383 | ||
1384 | void | |
1385 | prepare_desired_row (row) | |
1386 | struct glyph_row *row; | |
1387 | { | |
1388 | if (!row->enabled_p) | |
1389 | { | |
1390 | clear_glyph_row (row); | |
1391 | row->enabled_p = 1; | |
1392 | } | |
1393 | } | |
1394 | ||
1395 | ||
1396 | /* Return a hash code for glyph row ROW. */ | |
1397 | ||
1398 | int | |
1399 | line_hash_code (row) | |
1400 | struct glyph_row *row; | |
1401 | { | |
1402 | int hash = 0; | |
177c0ea7 | 1403 | |
5f5c8ee5 GM |
1404 | if (row->enabled_p) |
1405 | { | |
4cecaab8 MB |
1406 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1407 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1408 | ||
1409 | while (glyph < end) | |
1410 | { | |
1411 | int c = glyph->u.ch; | |
1412 | int face_id = glyph->face_id; | |
daf01701 | 1413 | if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
4cecaab8 MB |
1414 | c -= SPACEGLYPH; |
1415 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1416 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1417 | ++glyph; | |
1418 | } | |
5f5c8ee5 | 1419 | |
4cecaab8 MB |
1420 | if (hash == 0) |
1421 | hash = 1; | |
5f5c8ee5 GM |
1422 | } |
1423 | ||
1424 | return hash; | |
1425 | } | |
1426 | ||
1427 | ||
153a073c | 1428 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1429 | the number of characters in the line. If must_write_spaces is |
1430 | zero, leading and trailing spaces are ignored. */ | |
1431 | ||
1432 | static unsigned int | |
1433 | line_draw_cost (matrix, vpos) | |
1434 | struct glyph_matrix *matrix; | |
1435 | int vpos; | |
1436 | { | |
1437 | struct glyph_row *row = matrix->rows + vpos; | |
1438 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1439 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1440 | int len; | |
1441 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
1442 | int glyph_table_len = GLYPH_TABLE_LENGTH; | |
1443 | ||
1444 | /* Ignore trailing and leading spaces if we can. */ | |
daf01701 | 1445 | if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
5f5c8ee5 GM |
1446 | { |
1447 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1448 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1449 | --end; |
1450 | ||
177c0ea7 | 1451 | /* All blank line. */ |
5f5c8ee5 GM |
1452 | if (end == beg) |
1453 | return 0; | |
1454 | ||
1455 | /* Skip over leading spaces. */ | |
1456 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1457 | ++beg; | |
1458 | } | |
1459 | ||
1460 | /* If we don't have a glyph-table, each glyph is one character, | |
1461 | so return the number of glyphs. */ | |
1462 | if (glyph_table_base == 0) | |
1463 | len = end - beg; | |
1464 | else | |
1465 | { | |
1466 | /* Otherwise, scan the glyphs and accumulate their total length | |
1467 | in LEN. */ | |
1468 | len = 0; | |
1469 | while (beg < end) | |
1470 | { | |
1471 | GLYPH g = GLYPH_FROM_CHAR_GLYPH (*beg); | |
177c0ea7 | 1472 | |
42186983 KH |
1473 | if (g < 0 |
1474 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) | |
5f5c8ee5 GM |
1475 | len += 1; |
1476 | else | |
1477 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1478 | |
5f5c8ee5 GM |
1479 | ++beg; |
1480 | } | |
1481 | } | |
177c0ea7 | 1482 | |
5f5c8ee5 GM |
1483 | return len; |
1484 | } | |
1485 | ||
1486 | ||
1487 | /* Test two glyph rows A and B for equality. Value is non-zero if A | |
1488 | and B have equal contents. W is the window to which the glyphs | |
1489 | rows A and B belong. It is needed here to test for partial row | |
e4e0bee9 GM |
1490 | visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p |
1491 | flags of A and B, too. */ | |
5f5c8ee5 | 1492 | |
177c0ea7 | 1493 | static INLINE int |
e4e0bee9 | 1494 | row_equal_p (w, a, b, mouse_face_p) |
5f5c8ee5 GM |
1495 | struct window *w; |
1496 | struct glyph_row *a, *b; | |
e4e0bee9 | 1497 | int mouse_face_p; |
5f5c8ee5 GM |
1498 | { |
1499 | if (a == b) | |
1500 | return 1; | |
1501 | else if (a->hash != b->hash) | |
1502 | return 0; | |
1503 | else | |
1504 | { | |
1505 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1506 | int area; | |
1507 | ||
e4e0bee9 GM |
1508 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1509 | return 0; | |
1510 | ||
5f5c8ee5 GM |
1511 | /* Compare glyphs. */ |
1512 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1513 | { | |
1514 | if (a->used[area] != b->used[area]) | |
1515 | return 0; | |
177c0ea7 | 1516 | |
5f5c8ee5 GM |
1517 | a_glyph = a->glyphs[area]; |
1518 | a_end = a_glyph + a->used[area]; | |
1519 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1520 | |
5f5c8ee5 GM |
1521 | while (a_glyph < a_end |
1522 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1523 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1524 | |
5f5c8ee5 GM |
1525 | if (a_glyph != a_end) |
1526 | return 0; | |
1527 | } | |
1528 | ||
60e99293 KS |
1529 | if (a->fill_line_p != b->fill_line_p |
1530 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1531 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
5cbd733a | 1532 | || a->left_fringe_face_id != b->left_fringe_face_id |
60e99293 | 1533 | || a->right_fringe_bitmap != b->right_fringe_bitmap |
5cbd733a | 1534 | || a->right_fringe_face_id != b->right_fringe_face_id |
3d4a365f | 1535 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
60e99293 | 1536 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1537 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1538 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1539 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
1540 | /* Different partially visible characters on left margin. */ | |
1541 | || a->x != b->x | |
1542 | /* Different height. */ | |
1543 | || a->ascent != b->ascent | |
408f5064 GM |
1544 | || a->phys_ascent != b->phys_ascent |
1545 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1546 | || a->visible_height != b->visible_height) |
1547 | return 0; | |
1548 | } | |
1549 | ||
1550 | return 1; | |
1551 | } | |
1552 | ||
1553 | ||
1554 | \f | |
1555 | /*********************************************************************** | |
1556 | Glyph Pool | |
1557 | ||
1558 | See dispextern.h for an overall explanation of glyph pools. | |
1559 | ***********************************************************************/ | |
1560 | ||
1561 | /* Allocate a glyph_pool structure. The structure returned is | |
1562 | initialized with zeros. The global variable glyph_pool_count is | |
1563 | incremented for each pool allocated. */ | |
1564 | ||
1565 | static struct glyph_pool * | |
1566 | new_glyph_pool () | |
1567 | { | |
1568 | struct glyph_pool *result; | |
1569 | ||
1570 | /* Allocate a new glyph_pool and clear it. */ | |
1571 | result = (struct glyph_pool *) xmalloc (sizeof *result); | |
1572 | bzero (result, sizeof *result); | |
177c0ea7 | 1573 | |
5f5c8ee5 GM |
1574 | /* For memory leak and double deletion checking. */ |
1575 | ++glyph_pool_count; | |
177c0ea7 | 1576 | |
5f5c8ee5 GM |
1577 | return result; |
1578 | } | |
1579 | ||
1580 | ||
1581 | /* Free a glyph_pool structure POOL. The function may be called with | |
1582 | a null POOL pointer. The global variable glyph_pool_count is | |
1583 | decremented with every pool structure freed. If this count gets | |
1584 | negative, more structures were freed than allocated, i.e. one | |
1585 | structure must have been freed more than once or a bogus pointer | |
1586 | was passed to free_glyph_pool. */ | |
1587 | ||
1588 | static void | |
1589 | free_glyph_pool (pool) | |
1590 | struct glyph_pool *pool; | |
1591 | { | |
1592 | if (pool) | |
1593 | { | |
153a073c | 1594 | /* More freed than allocated? */ |
5f5c8ee5 GM |
1595 | --glyph_pool_count; |
1596 | xassert (glyph_pool_count >= 0); | |
1597 | ||
1598 | xfree (pool->glyphs); | |
1599 | xfree (pool); | |
1600 | } | |
1601 | } | |
1602 | ||
1603 | ||
1604 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1605 | columns we need. This function never shrinks a pool. The only | |
1606 | case in which this would make sense, would be when a frame's size | |
1607 | is changed from a large value to a smaller one. But, if someone | |
1608 | does it once, we can expect that he will do it again. | |
1609 | ||
1610 | Value is non-zero if the pool changed in a way which makes | |
1611 | re-adjusting window glyph matrices necessary. */ | |
1612 | ||
1613 | static int | |
1614 | realloc_glyph_pool (pool, matrix_dim) | |
1615 | struct glyph_pool *pool; | |
1616 | struct dim matrix_dim; | |
1617 | { | |
1618 | int needed; | |
1619 | int changed_p; | |
1620 | ||
1621 | changed_p = (pool->glyphs == 0 | |
1622 | || matrix_dim.height != pool->nrows | |
1623 | || matrix_dim.width != pool->ncolumns); | |
1624 | ||
1625 | /* Enlarge the glyph pool. */ | |
1626 | needed = matrix_dim.width * matrix_dim.height; | |
1627 | if (needed > pool->nglyphs) | |
1628 | { | |
1629 | int size = needed * sizeof (struct glyph); | |
1630 | ||
1631 | if (pool->glyphs) | |
1632 | pool->glyphs = (struct glyph *) xrealloc (pool->glyphs, size); | |
1633 | else | |
1634 | { | |
1635 | pool->glyphs = (struct glyph *) xmalloc (size); | |
1636 | bzero (pool->glyphs, size); | |
1637 | } | |
1638 | ||
1639 | pool->nglyphs = needed; | |
1640 | } | |
1641 | ||
153a073c | 1642 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1643 | to do sanity checks, and (b) the number of columns determines |
1644 | where rows in the frame matrix start---this must be available to | |
1645 | determine pointers to rows of window sub-matrices. */ | |
1646 | pool->nrows = matrix_dim.height; | |
1647 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1648 | |
5f5c8ee5 GM |
1649 | return changed_p; |
1650 | } | |
1651 | ||
1652 | ||
1653 | \f | |
1654 | /*********************************************************************** | |
1655 | Debug Code | |
1656 | ***********************************************************************/ | |
1657 | ||
1658 | #if GLYPH_DEBUG | |
1659 | ||
a13396c9 | 1660 | |
28d440ab KL |
1661 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1662 | XXX Maybe this should be changed to flush the current terminal instead of | |
1663 | stdout. | |
1664 | */ | |
a13396c9 GM |
1665 | |
1666 | void | |
1667 | flush_stdout () | |
1668 | { | |
1669 | fflush (stdout); | |
1670 | } | |
1671 | ||
1672 | ||
5f5c8ee5 GM |
1673 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1674 | pointer has been lost, e.g. by using a structure assignment between | |
1675 | rows, at least one pointer must occur more than once in the rows of | |
1676 | MATRIX. */ | |
1677 | ||
1678 | void | |
1679 | check_matrix_pointer_lossage (matrix) | |
1680 | struct glyph_matrix *matrix; | |
1681 | { | |
1682 | int i, j; | |
177c0ea7 | 1683 | |
5f5c8ee5 GM |
1684 | for (i = 0; i < matrix->nrows; ++i) |
1685 | for (j = 0; j < matrix->nrows; ++j) | |
1686 | xassert (i == j | |
1687 | || (matrix->rows[i].glyphs[TEXT_AREA] | |
1688 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1689 | } | |
1690 | ||
1691 | ||
1692 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1693 | ||
1694 | struct glyph_row * | |
1695 | matrix_row (matrix, row) | |
1696 | struct glyph_matrix *matrix; | |
1697 | int row; | |
1698 | { | |
1699 | xassert (matrix && matrix->rows); | |
1700 | xassert (row >= 0 && row < matrix->nrows); | |
1701 | ||
1702 | /* That's really too slow for normal testing because this function | |
1703 | is called almost everywhere. Although---it's still astonishingly | |
1704 | fast, so it is valuable to have for debugging purposes. */ | |
1705 | #if 0 | |
1706 | check_matrix_pointer_lossage (matrix); | |
1707 | #endif | |
177c0ea7 | 1708 | |
5f5c8ee5 GM |
1709 | return matrix->rows + row; |
1710 | } | |
1711 | ||
1712 | ||
1713 | #if 0 /* This function makes invalid assumptions when text is | |
1714 | partially invisible. But it might come handy for debugging | |
1715 | nevertheless. */ | |
1716 | ||
1717 | /* Check invariants that must hold for an up to date current matrix of | |
1718 | window W. */ | |
1719 | ||
1720 | static void | |
1721 | check_matrix_invariants (w) | |
1722 | struct window *w; | |
1723 | { | |
1724 | struct glyph_matrix *matrix = w->current_matrix; | |
1725 | int yb = window_text_bottom_y (w); | |
1726 | struct glyph_row *row = matrix->rows; | |
1727 | struct glyph_row *last_text_row = NULL; | |
1728 | struct buffer *saved = current_buffer; | |
1729 | struct buffer *buffer = XBUFFER (w->buffer); | |
1730 | int c; | |
177c0ea7 | 1731 | |
5f5c8ee5 GM |
1732 | /* This can sometimes happen for a fresh window. */ |
1733 | if (matrix->nrows < 2) | |
1734 | return; | |
1735 | ||
1736 | set_buffer_temp (buffer); | |
1737 | ||
1738 | /* Note: last row is always reserved for the mode line. */ | |
1739 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1740 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1741 | { | |
1742 | struct glyph_row *next = row + 1; | |
1743 | ||
1744 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1745 | last_text_row = row; | |
1746 | ||
1747 | /* Check that character and byte positions are in sync. */ | |
1748 | xassert (MATRIX_ROW_START_BYTEPOS (row) | |
1749 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); | |
1750 | ||
1751 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1752 | have such a position temporarily in case of a minibuffer | |
1753 | displaying something like `[Sole completion]' at its end. */ | |
1754 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
1755 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1756 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); | |
1757 | ||
1758 | /* Check that end position of `row' is equal to start position | |
1759 | of next row. */ | |
1760 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1761 | { | |
1762 | xassert (MATRIX_ROW_END_CHARPOS (row) | |
1763 | == MATRIX_ROW_START_CHARPOS (next)); | |
1764 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1765 | == MATRIX_ROW_START_BYTEPOS (next)); | |
1766 | } | |
1767 | row = next; | |
1768 | } | |
1769 | ||
1770 | xassert (w->current_matrix->nrows == w->desired_matrix->nrows); | |
1771 | xassert (w->desired_matrix->rows != NULL); | |
1772 | set_buffer_temp (saved); | |
1773 | } | |
1774 | ||
1775 | #endif /* 0 */ | |
1776 | ||
1777 | #endif /* GLYPH_DEBUG != 0 */ | |
1778 | ||
1779 | ||
1780 | \f | |
1781 | /********************************************************************** | |
1782 | Allocating/ Adjusting Glyph Matrices | |
1783 | **********************************************************************/ | |
1784 | ||
1785 | /* Allocate glyph matrices over a window tree for a frame-based | |
1786 | redisplay | |
1787 | ||
1788 | X and Y are column/row within the frame glyph matrix where | |
1789 | sub-matrices for the window tree rooted at WINDOW must be | |
8ce2650d YM |
1790 | allocated. DIM_ONLY_P non-zero means that the caller of this |
1791 | function is only interested in the result matrix dimension, and | |
1792 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1793 | |
1794 | The function returns the total width/height of the sub-matrices of | |
1795 | the window tree. If called on a frame root window, the computation | |
1796 | will take the mini-buffer window into account. | |
1797 | ||
1798 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1799 | ||
1800 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1801 | glyph matrices yet, and | |
1802 | ||
1803 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1804 | any window in the tree will be changed or have been changed (see | |
153a073c | 1805 | DIM_ONLY_P) |
5f5c8ee5 GM |
1806 | |
1807 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1808 | function. | |
1809 | ||
1810 | Windows are arranged into chains of windows on the same level | |
1811 | through the next fields of window structures. Such a level can be | |
1812 | either a sequence of horizontally adjacent windows from left to | |
1813 | right, or a sequence of vertically adjacent windows from top to | |
1814 | bottom. Each window in a horizontal sequence can be either a leaf | |
1815 | window or a vertical sequence; a window in a vertical sequence can | |
1816 | be either a leaf or a horizontal sequence. All windows in a | |
1817 | horizontal sequence have the same height, and all windows in a | |
1818 | vertical sequence have the same width. | |
1819 | ||
1820 | This function uses, for historical reasons, a more general | |
1821 | algorithm to determine glyph matrix dimensions that would be | |
1822 | necessary. | |
1823 | ||
1824 | The matrix height of a horizontal sequence is determined by the | |
1825 | maximum height of any matrix in the sequence. The matrix width of | |
1826 | a horizontal sequence is computed by adding up matrix widths of | |
1827 | windows in the sequence. | |
1828 | ||
1829 | |<------- result width ------->| | |
1830 | +---------+----------+---------+ --- | |
1831 | | | | | | | |
1832 | | | | | | |
1833 | +---------+ | | result height | |
1834 | | +---------+ | |
1835 | | | | | |
1836 | +----------+ --- | |
1837 | ||
1838 | The matrix width of a vertical sequence is the maximum matrix width | |
1839 | of any window in the sequence. Its height is computed by adding up | |
1840 | matrix heights of windows in the sequence. | |
1841 | ||
1842 | |<---- result width -->| | |
1843 | +---------+ --- | |
1844 | | | | | |
1845 | | | | | |
1846 | +---------+--+ | | |
1847 | | | | | |
1848 | | | result height | |
1849 | | | | |
1850 | +------------+---------+ | | |
1851 | | | | | |
1852 | | | | | |
1853 | +------------+---------+ --- */ | |
1854 | ||
1855 | /* Bit indicating that a new matrix will be allocated or has been | |
1856 | allocated. */ | |
1857 | ||
1858 | #define NEW_LEAF_MATRIX (1 << 0) | |
1859 | ||
1860 | /* Bit indicating that a matrix will or has changed its location or | |
1861 | size. */ | |
1862 | ||
1863 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1864 | ||
1865 | static struct dim | |
5d3cc43c GM |
1866 | allocate_matrices_for_frame_redisplay (window, x, y, dim_only_p, |
1867 | window_change_flags) | |
5f5c8ee5 GM |
1868 | Lisp_Object window; |
1869 | int x, y; | |
5f5c8ee5 GM |
1870 | int dim_only_p; |
1871 | int *window_change_flags; | |
1872 | { | |
1873 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1874 | int x0 = x, y0 = y; | |
1875 | int wmax = 0, hmax = 0; | |
1876 | struct dim total; | |
1877 | struct dim dim; | |
1878 | struct window *w; | |
1879 | int in_horz_combination_p; | |
1880 | ||
1881 | /* What combination is WINDOW part of? Compute this once since the | |
1882 | result is the same for all windows in the `next' chain. The | |
1883 | special case of a root window (parent equal to nil) is treated | |
1884 | like a vertical combination because a root window's `next' | |
1885 | points to the mini-buffer window, if any, which is arranged | |
1886 | vertically below other windows. */ | |
1887 | in_horz_combination_p | |
1888 | = (!NILP (XWINDOW (window)->parent) | |
1889 | && !NILP (XWINDOW (XWINDOW (window)->parent)->hchild)); | |
1890 | ||
1891 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1892 | do |
5f5c8ee5 GM |
1893 | { |
1894 | w = XWINDOW (window); | |
1895 | ||
1896 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1897 | on whether this is a combination or a leaf window. */ |
5f5c8ee5 | 1898 | if (!NILP (w->hchild)) |
177c0ea7 | 1899 | dim = allocate_matrices_for_frame_redisplay (w->hchild, x, y, |
5f5c8ee5 GM |
1900 | dim_only_p, |
1901 | window_change_flags); | |
1902 | else if (!NILP (w->vchild)) | |
177c0ea7 | 1903 | dim = allocate_matrices_for_frame_redisplay (w->vchild, x, y, |
5f5c8ee5 GM |
1904 | dim_only_p, |
1905 | window_change_flags); | |
1906 | else | |
1907 | { | |
1908 | /* If not already done, allocate sub-matrix structures. */ | |
1909 | if (w->desired_matrix == NULL) | |
1910 | { | |
1911 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1912 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1913 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1914 | } | |
177c0ea7 | 1915 | |
5f5c8ee5 GM |
1916 | /* Width and height MUST be chosen so that there are no |
1917 | holes in the frame matrix. */ | |
5d3cc43c GM |
1918 | dim.width = required_matrix_width (w); |
1919 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1920 | |
1921 | /* Will matrix be re-allocated? */ | |
1922 | if (x != w->desired_matrix->matrix_x | |
1923 | || y != w->desired_matrix->matrix_y | |
1924 | || dim.width != w->desired_matrix->matrix_w | |
1925 | || dim.height != w->desired_matrix->matrix_h | |
1926 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1927 | w->left_margin_cols) |
5f5c8ee5 GM |
1928 | != w->desired_matrix->left_margin_glyphs) |
1929 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1930 | w->right_margin_cols) |
5f5c8ee5 GM |
1931 | != w->desired_matrix->right_margin_glyphs)) |
1932 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1933 | ||
1934 | /* Actually change matrices, if allowed. Do not consider | |
1935 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1936 | may have been changed which we don't now here. We trust | |
1937 | that we only will be called with DIM_ONLY_P != 0 when | |
1938 | necessary. */ | |
1939 | if (!dim_only_p) | |
1940 | { | |
1941 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1942 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1943 | } | |
1944 | } | |
1945 | ||
1946 | /* If we are part of a horizontal combination, advance x for | |
1947 | windows to the right of W; otherwise advance y for windows | |
1948 | below W. */ | |
1949 | if (in_horz_combination_p) | |
1950 | x += dim.width; | |
177c0ea7 | 1951 | else |
5f5c8ee5 GM |
1952 | y += dim.height; |
1953 | ||
1954 | /* Remember maximum glyph matrix dimensions. */ | |
1955 | wmax = max (wmax, dim.width); | |
1956 | hmax = max (hmax, dim.height); | |
1957 | ||
1958 | /* Next window on same level. */ | |
1959 | window = w->next; | |
1960 | } | |
1961 | while (!NILP (window)); | |
1962 | ||
1963 | /* Set `total' to the total glyph matrix dimension of this window | |
1964 | level. In a vertical combination, the width is the width of the | |
1965 | widest window; the height is the y we finally reached, corrected | |
1966 | by the y we started with. In a horizontal combination, the total | |
1967 | height is the height of the tallest window, and the width is the | |
1968 | x we finally reached, corrected by the x we started with. */ | |
1969 | if (in_horz_combination_p) | |
1970 | { | |
1971 | total.width = x - x0; | |
1972 | total.height = hmax; | |
1973 | } | |
177c0ea7 | 1974 | else |
5f5c8ee5 GM |
1975 | { |
1976 | total.width = wmax; | |
1977 | total.height = y - y0; | |
1978 | } | |
1979 | ||
1980 | return total; | |
1981 | } | |
1982 | ||
1983 | ||
5d3cc43c GM |
1984 | /* Return the required height of glyph matrices for window W. */ |
1985 | ||
1986 | int | |
1987 | required_matrix_height (w) | |
1988 | struct window *w; | |
1989 | { | |
1990 | #ifdef HAVE_WINDOW_SYSTEM | |
1991 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 1992 | |
5d3cc43c GM |
1993 | if (FRAME_WINDOW_P (f)) |
1994 | { | |
1995 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1ea40aa2 | 1996 | int window_pixel_height = window_box_height (w) + eabs (w->vscroll); |
5d3cc43c | 1997 | return (((window_pixel_height + ch_height - 1) |
cc834cf9 | 1998 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
1999 | /* One partially visible line at the top and |
2000 | bottom of the window. */ | |
2001 | + 2 | |
153a073c | 2002 | /* 2 for header and mode line. */ |
5d3cc43c GM |
2003 | + 2); |
2004 | } | |
2005 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 2006 | |
7df02016 | 2007 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
2008 | } |
2009 | ||
2010 | ||
2011 | /* Return the required width of glyph matrices for window W. */ | |
2012 | ||
2013 | int | |
2014 | required_matrix_width (w) | |
2015 | struct window *w; | |
2016 | { | |
2017 | #ifdef HAVE_WINDOW_SYSTEM | |
2018 | struct frame *f = XFRAME (w->frame); | |
2019 | if (FRAME_WINDOW_P (f)) | |
2020 | { | |
2021 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 2022 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 2023 | |
5d3cc43c GM |
2024 | /* Compute number of glyphs needed in a glyph row. */ |
2025 | return (((window_pixel_width + ch_width - 1) | |
cc834cf9 | 2026 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
2027 | /* 2 partially visible columns in the text area. */ |
2028 | + 2 | |
2029 | /* One partially visible column at the right | |
2030 | edge of each marginal area. */ | |
2031 | + 1 + 1); | |
2032 | } | |
2033 | #endif /* HAVE_WINDOW_SYSTEM */ | |
2034 | ||
7df02016 | 2035 | return XINT (w->total_cols); |
5d3cc43c GM |
2036 | } |
2037 | ||
2038 | ||
5f5c8ee5 | 2039 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 2040 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 2041 | |
5f5c8ee5 | 2042 | static void |
5d3cc43c | 2043 | allocate_matrices_for_window_redisplay (w) |
5f5c8ee5 | 2044 | struct window *w; |
5f5c8ee5 | 2045 | { |
5f5c8ee5 GM |
2046 | while (w) |
2047 | { | |
2048 | if (!NILP (w->vchild)) | |
5d3cc43c | 2049 | allocate_matrices_for_window_redisplay (XWINDOW (w->vchild)); |
5f5c8ee5 | 2050 | else if (!NILP (w->hchild)) |
5d3cc43c | 2051 | allocate_matrices_for_window_redisplay (XWINDOW (w->hchild)); |
5f5c8ee5 GM |
2052 | else |
2053 | { | |
2054 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
2055 | struct dim dim; |
2056 | ||
2057 | /* If matrices are not yet allocated, allocate them now. */ | |
2058 | if (w->desired_matrix == NULL) | |
2059 | { | |
2060 | w->desired_matrix = new_glyph_matrix (NULL); | |
2061 | w->current_matrix = new_glyph_matrix (NULL); | |
2062 | } | |
2063 | ||
5d3cc43c GM |
2064 | dim.width = required_matrix_width (w); |
2065 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
2066 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
2067 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
2068 | } | |
177c0ea7 | 2069 | |
5f5c8ee5 GM |
2070 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
2071 | } | |
2072 | } | |
2073 | ||
2074 | ||
2075 | /* Re-allocate/ re-compute glyph matrices on frame F. If F is null, | |
2076 | do it for all frames; otherwise do it just for the given frame. | |
2077 | This function must be called when a new frame is created, its size | |
2078 | changes, or its window configuration changes. */ | |
2079 | ||
2080 | void | |
2081 | adjust_glyphs (f) | |
2082 | struct frame *f; | |
2083 | { | |
408f5064 GM |
2084 | /* Block input so that expose events and other events that access |
2085 | glyph matrices are not processed while we are changing them. */ | |
2086 | BLOCK_INPUT; | |
2087 | ||
5f5c8ee5 GM |
2088 | if (f) |
2089 | adjust_frame_glyphs (f); | |
2090 | else | |
2091 | { | |
2092 | Lisp_Object tail, lisp_frame; | |
177c0ea7 | 2093 | |
5f5c8ee5 GM |
2094 | FOR_EACH_FRAME (tail, lisp_frame) |
2095 | adjust_frame_glyphs (XFRAME (lisp_frame)); | |
2096 | } | |
408f5064 GM |
2097 | |
2098 | UNBLOCK_INPUT; | |
5f5c8ee5 GM |
2099 | } |
2100 | ||
2101 | ||
2102 | /* Adjust frame glyphs when Emacs is initialized. | |
177c0ea7 JB |
2103 | |
2104 | To be called from init_display. | |
2105 | ||
5f5c8ee5 GM |
2106 | We need a glyph matrix because redraw will happen soon. |
2107 | Unfortunately, window sizes on selected_frame are not yet set to | |
2108 | meaningful values. I believe we can assume that there are only two | |
2109 | windows on the frame---the mini-buffer and the root window. Frame | |
2110 | height and width seem to be correct so far. So, set the sizes of | |
2111 | windows to estimated values. */ | |
2112 | ||
2113 | static void | |
2114 | adjust_frame_glyphs_initially () | |
2115 | { | |
91fb7e1b GM |
2116 | struct frame *sf = SELECTED_FRAME (); |
2117 | struct window *root = XWINDOW (sf->root_window); | |
5f5c8ee5 | 2118 | struct window *mini = XWINDOW (root->next); |
7df02016 KS |
2119 | int frame_lines = FRAME_LINES (sf); |
2120 | int frame_cols = FRAME_COLS (sf); | |
91fb7e1b | 2121 | int top_margin = FRAME_TOP_MARGIN (sf); |
5f5c8ee5 GM |
2122 | |
2123 | /* Do it for the root window. */ | |
7df02016 KS |
2124 | XSETFASTINT (root->top_line, top_margin); |
2125 | XSETFASTINT (root->total_cols, frame_cols); | |
2126 | set_window_height (sf->root_window, frame_lines - 1 - top_margin, 0); | |
5f5c8ee5 GM |
2127 | |
2128 | /* Do it for the mini-buffer window. */ | |
7df02016 KS |
2129 | XSETFASTINT (mini->top_line, frame_lines - 1); |
2130 | XSETFASTINT (mini->total_cols, frame_cols); | |
5f5c8ee5 GM |
2131 | set_window_height (root->next, 1, 0); |
2132 | ||
91fb7e1b | 2133 | adjust_frame_glyphs (sf); |
5f5c8ee5 GM |
2134 | glyphs_initialized_initially_p = 1; |
2135 | } | |
177c0ea7 | 2136 | |
5f5c8ee5 GM |
2137 | |
2138 | /* Allocate/reallocate glyph matrices of a single frame F. */ | |
2139 | ||
2140 | static void | |
2141 | adjust_frame_glyphs (f) | |
2142 | struct frame *f; | |
2143 | { | |
2144 | if (FRAME_WINDOW_P (f)) | |
2145 | adjust_frame_glyphs_for_window_redisplay (f); | |
2146 | else | |
2147 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 2148 | |
5f5c8ee5 GM |
2149 | /* Don't forget the message buffer and the buffer for |
2150 | decode_mode_spec. */ | |
2151 | adjust_frame_message_buffer (f); | |
2152 | adjust_decode_mode_spec_buffer (f); | |
2153 | ||
2154 | f->glyphs_initialized_p = 1; | |
2155 | } | |
2156 | ||
075757cc CY |
2157 | /* Return 1 if any window in the tree has nonzero window margins. See |
2158 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ | |
2159 | static int | |
2160 | showing_window_margins_p (w) | |
2161 | struct window *w; | |
2162 | { | |
2163 | while (w) | |
2164 | { | |
2165 | if (!NILP (w->hchild)) | |
2166 | { | |
2167 | if (showing_window_margins_p (XWINDOW (w->hchild))) | |
2168 | return 1; | |
2169 | } | |
2170 | else if (!NILP (w->vchild)) | |
2171 | { | |
2172 | if (showing_window_margins_p (XWINDOW (w->vchild))) | |
2173 | return 1; | |
2174 | } | |
2175 | else if (!NILP (w->left_margin_cols) | |
2176 | || !NILP (w->right_margin_cols)) | |
2177 | return 1; | |
2178 | ||
2179 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2180 | } | |
2181 | return 0; | |
2182 | } | |
2183 | ||
5f5c8ee5 | 2184 | |
c9f00270 GM |
2185 | /* In the window tree with root W, build current matrices of leaf |
2186 | windows from the frame's current matrix. */ | |
2187 | ||
2188 | static void | |
2189 | fake_current_matrices (window) | |
2190 | Lisp_Object window; | |
2191 | { | |
2192 | struct window *w; | |
177c0ea7 | 2193 | |
c9f00270 GM |
2194 | for (; !NILP (window); window = w->next) |
2195 | { | |
2196 | w = XWINDOW (window); | |
177c0ea7 | 2197 | |
c9f00270 GM |
2198 | if (!NILP (w->hchild)) |
2199 | fake_current_matrices (w->hchild); | |
2200 | else if (!NILP (w->vchild)) | |
2201 | fake_current_matrices (w->vchild); | |
2202 | else | |
2203 | { | |
2204 | int i; | |
2205 | struct frame *f = XFRAME (w->frame); | |
2206 | struct glyph_matrix *m = w->current_matrix; | |
2207 | struct glyph_matrix *fm = f->current_matrix; | |
2208 | ||
7df02016 KS |
2209 | xassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
2210 | xassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 2211 | |
c9f00270 GM |
2212 | for (i = 0; i < m->matrix_h; ++i) |
2213 | { | |
2214 | struct glyph_row *r = m->rows + i; | |
7df02016 | 2215 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 GM |
2216 | |
2217 | xassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] | |
2218 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); | |
2219 | ||
2220 | r->enabled_p = fr->enabled_p; | |
2221 | if (r->enabled_p) | |
2222 | { | |
2223 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
2224 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
2225 | r->used[TEXT_AREA] = (m->matrix_w | |
2226 | - r->used[LEFT_MARGIN_AREA] | |
2227 | - r->used[RIGHT_MARGIN_AREA]); | |
2228 | r->mode_line_p = 0; | |
c9f00270 GM |
2229 | } |
2230 | } | |
2231 | } | |
2232 | } | |
2233 | } | |
2234 | ||
2235 | ||
bccee4f2 | 2236 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 2237 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 2238 | |
bccee4f2 GM |
2239 | static struct glyph_matrix * |
2240 | save_current_matrix (f) | |
31798cfe | 2241 | struct frame *f; |
c9f00270 | 2242 | { |
bccee4f2 GM |
2243 | int i; |
2244 | struct glyph_matrix *saved; | |
e797dea6 | 2245 | |
bccee4f2 GM |
2246 | saved = (struct glyph_matrix *) xmalloc (sizeof *saved); |
2247 | bzero (saved, sizeof *saved); | |
2248 | saved->nrows = f->current_matrix->nrows; | |
2249 | saved->rows = (struct glyph_row *) xmalloc (saved->nrows | |
2250 | * sizeof *saved->rows); | |
2251 | bzero (saved->rows, saved->nrows * sizeof *saved->rows); | |
2252 | ||
2253 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 2254 | { |
bccee4f2 GM |
2255 | struct glyph_row *from = f->current_matrix->rows + i; |
2256 | struct glyph_row *to = saved->rows + i; | |
2257 | size_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); | |
2258 | to->glyphs[TEXT_AREA] = (struct glyph *) xmalloc (nbytes); | |
2259 | bcopy (from->glyphs[TEXT_AREA], to->glyphs[TEXT_AREA], nbytes); | |
2260 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; | |
e797dea6 | 2261 | } |
bccee4f2 GM |
2262 | |
2263 | return saved; | |
2264 | } | |
2265 | ||
2266 | ||
2267 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
2268 | and free memory associated with SAVED. */ | |
2269 | ||
2270 | static void | |
2271 | restore_current_matrix (f, saved) | |
2272 | struct frame *f; | |
2273 | struct glyph_matrix *saved; | |
2274 | { | |
2275 | int i; | |
2276 | ||
2277 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 2278 | { |
bccee4f2 GM |
2279 | struct glyph_row *from = saved->rows + i; |
2280 | struct glyph_row *to = f->current_matrix->rows + i; | |
e797dea6 GM |
2281 | size_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
2282 | bcopy (from->glyphs[TEXT_AREA], to->glyphs[TEXT_AREA], nbytes); | |
2283 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; | |
bccee4f2 | 2284 | xfree (from->glyphs[TEXT_AREA]); |
e797dea6 | 2285 | } |
177c0ea7 | 2286 | |
bccee4f2 GM |
2287 | xfree (saved->rows); |
2288 | xfree (saved); | |
c9f00270 GM |
2289 | } |
2290 | ||
2291 | ||
bccee4f2 | 2292 | |
5f5c8ee5 GM |
2293 | /* Allocate/reallocate glyph matrices of a single frame F for |
2294 | frame-based redisplay. */ | |
2295 | ||
2296 | static void | |
2297 | adjust_frame_glyphs_for_frame_redisplay (f) | |
2298 | struct frame *f; | |
2299 | { | |
5f5c8ee5 GM |
2300 | struct dim matrix_dim; |
2301 | int pool_changed_p; | |
2302 | int window_change_flags; | |
2303 | int top_window_y; | |
2304 | ||
2305 | if (!FRAME_LIVE_P (f)) | |
2306 | return; | |
2307 | ||
5f5c8ee5 GM |
2308 | top_window_y = FRAME_TOP_MARGIN (f); |
2309 | ||
2310 | /* Allocate glyph pool structures if not already done. */ | |
2311 | if (f->desired_pool == NULL) | |
2312 | { | |
2313 | f->desired_pool = new_glyph_pool (); | |
2314 | f->current_pool = new_glyph_pool (); | |
2315 | } | |
2316 | ||
2317 | /* Allocate frames matrix structures if needed. */ | |
2318 | if (f->desired_matrix == NULL) | |
2319 | { | |
2320 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
2321 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
2322 | } | |
177c0ea7 | 2323 | |
5f5c8ee5 GM |
2324 | /* Compute window glyph matrices. (This takes the mini-buffer |
2325 | window into account). The result is the size of the frame glyph | |
2326 | matrix needed. The variable window_change_flags is set to a bit | |
2327 | mask indicating whether new matrices will be allocated or | |
2328 | existing matrices change their size or location within the frame | |
2329 | matrix. */ | |
2330 | window_change_flags = 0; | |
2331 | matrix_dim | |
2332 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
2333 | 0, top_window_y, | |
5d3cc43c | 2334 | 1, |
5f5c8ee5 GM |
2335 | &window_change_flags); |
2336 | ||
2337 | /* Add in menu bar lines, if any. */ | |
2338 | matrix_dim.height += top_window_y; | |
2339 | ||
2340 | /* Enlarge pools as necessary. */ | |
2341 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
2342 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
2343 | ||
177c0ea7 | 2344 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
2345 | absolutely necessary since it requires a frame redraw. */ |
2346 | if (pool_changed_p || window_change_flags) | |
2347 | { | |
2348 | /* Do it for window matrices. */ | |
2349 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 2350 | 0, top_window_y, 0, |
5f5c8ee5 GM |
2351 | &window_change_flags); |
2352 | ||
2353 | /* Size of frame matrices must equal size of frame. Note | |
2354 | that we are called for X frames with window widths NOT equal | |
2355 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
7df02016 KS |
2356 | xassert (matrix_dim.width == FRAME_COLS (f) |
2357 | && matrix_dim.height == FRAME_LINES (f)); | |
177c0ea7 | 2358 | |
e797dea6 GM |
2359 | /* Pointers to glyph memory in glyph rows are exchanged during |
2360 | the update phase of redisplay, which means in general that a | |
2361 | frame's current matrix consists of pointers into both the | |
2362 | desired and current glyph pool of the frame. Adjusting a | |
2363 | matrix sets the frame matrix up so that pointers are all into | |
2364 | the same pool. If we want to preserve glyph contents of the | |
2365 | current matrix over a call to adjust_glyph_matrix, we must | |
2366 | make a copy of the current glyphs, and restore the current | |
2367 | matrix' contents from that copy. */ | |
2368 | if (display_completed | |
2369 | && !FRAME_GARBAGED_P (f) | |
2370 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
2371 | && matrix_dim.height == f->current_matrix->matrix_h |
2372 | /* For some reason, the frame glyph matrix gets corrupted if | |
2373 | any of the windows contain margins. I haven't been able | |
2374 | to hunt down the reason, but for the moment this prevents | |
2375 | the problem from manifesting. -- cyd */ | |
2376 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) | |
e797dea6 | 2377 | { |
bccee4f2 GM |
2378 | struct glyph_matrix *copy = save_current_matrix (f); |
2379 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2380 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2381 | restore_current_matrix (f, copy); |
e797dea6 GM |
2382 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2383 | } | |
c9f00270 | 2384 | else |
e797dea6 | 2385 | { |
bccee4f2 | 2386 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2387 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2388 | SET_FRAME_GARBAGED (f); | |
2389 | } | |
5f5c8ee5 GM |
2390 | } |
2391 | } | |
2392 | ||
2393 | ||
2394 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2395 | window-based redisplay. */ | |
2396 | ||
2397 | static void | |
2398 | adjust_frame_glyphs_for_window_redisplay (f) | |
2399 | struct frame *f; | |
2400 | { | |
5f5c8ee5 GM |
2401 | struct window *w; |
2402 | ||
2403 | xassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); | |
177c0ea7 | 2404 | |
5f5c8ee5 | 2405 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2406 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2407 | |
8ce2650d | 2408 | #ifdef HAVE_X_WINDOWS |
5f5c8ee5 GM |
2409 | /* Allocate/ reallocate matrices of the dummy window used to display |
2410 | the menu bar under X when no X toolkit support is available. */ | |
488dd4c4 | 2411 | #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2412 | { |
2413 | /* Allocate a dummy window if not already done. */ | |
2414 | if (NILP (f->menu_bar_window)) | |
2415 | { | |
2416 | f->menu_bar_window = make_window (); | |
2417 | w = XWINDOW (f->menu_bar_window); | |
2418 | XSETFRAME (w->frame, f); | |
2419 | w->pseudo_window_p = 1; | |
2420 | } | |
2421 | else | |
2422 | w = XWINDOW (f->menu_bar_window); | |
2423 | ||
2424 | /* Set window dimensions to frame dimensions and allocate or | |
2425 | adjust glyph matrices of W. */ | |
7df02016 KS |
2426 | XSETFASTINT (w->top_line, 0); |
2427 | XSETFASTINT (w->left_col, 0); | |
2428 | XSETFASTINT (w->total_lines, FRAME_MENU_BAR_LINES (f)); | |
2429 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
5d3cc43c | 2430 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2431 | } |
57714a86 YM |
2432 | #endif /* not USE_X_TOOLKIT && not USE_GTK */ |
2433 | #endif /* HAVE_X_WINDOWS */ | |
5f5c8ee5 | 2434 | |
488dd4c4 | 2435 | #ifndef USE_GTK |
9ea173e8 GM |
2436 | /* Allocate/ reallocate matrices of the tool bar window. If we |
2437 | don't have a tool bar window yet, make one. */ | |
2438 | if (NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2439 | { |
9ea173e8 GM |
2440 | f->tool_bar_window = make_window (); |
2441 | w = XWINDOW (f->tool_bar_window); | |
5f5c8ee5 GM |
2442 | XSETFRAME (w->frame, f); |
2443 | w->pseudo_window_p = 1; | |
2444 | } | |
2445 | else | |
9ea173e8 | 2446 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2447 | |
7df02016 KS |
2448 | XSETFASTINT (w->top_line, FRAME_MENU_BAR_LINES (f)); |
2449 | XSETFASTINT (w->left_col, 0); | |
2450 | XSETFASTINT (w->total_lines, FRAME_TOOL_BAR_LINES (f)); | |
2451 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
5d3cc43c | 2452 | allocate_matrices_for_window_redisplay (w); |
488dd4c4 | 2453 | #endif |
5f5c8ee5 GM |
2454 | } |
2455 | ||
2456 | ||
177c0ea7 | 2457 | /* Adjust/ allocate message buffer of frame F. |
5f5c8ee5 | 2458 | |
5f5c8ee5 GM |
2459 | Note that the message buffer is never freed. Since I could not |
2460 | find a free in 19.34, I assume that freeing it would be | |
2461 | problematic in some way and don't do it either. | |
2462 | ||
2463 | (Implementation note: It should be checked if we can free it | |
2464 | eventually without causing trouble). */ | |
2465 | ||
2466 | static void | |
2467 | adjust_frame_message_buffer (f) | |
2468 | struct frame *f; | |
2469 | { | |
2470 | int size = FRAME_MESSAGE_BUF_SIZE (f) + 1; | |
2471 | ||
2472 | if (FRAME_MESSAGE_BUF (f)) | |
2473 | { | |
2474 | char *buffer = FRAME_MESSAGE_BUF (f); | |
2475 | char *new_buffer = (char *) xrealloc (buffer, size); | |
5f5c8ee5 GM |
2476 | FRAME_MESSAGE_BUF (f) = new_buffer; |
2477 | } | |
2478 | else | |
2479 | FRAME_MESSAGE_BUF (f) = (char *) xmalloc (size); | |
2480 | } | |
2481 | ||
2482 | ||
2483 | /* Re-allocate buffer for decode_mode_spec on frame F. */ | |
2484 | ||
2485 | static void | |
2486 | adjust_decode_mode_spec_buffer (f) | |
2487 | struct frame *f; | |
2488 | { | |
2489 | f->decode_mode_spec_buffer | |
2490 | = (char *) xrealloc (f->decode_mode_spec_buffer, | |
2491 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
2492 | } | |
2493 | ||
2494 | ||
2495 | \f | |
2496 | /********************************************************************** | |
2497 | Freeing Glyph Matrices | |
2498 | **********************************************************************/ | |
2499 | ||
2500 | /* Free glyph memory for a frame F. F may be null. This function can | |
2501 | be called for the same frame more than once. The root window of | |
2502 | F may be nil when this function is called. This is the case when | |
2503 | the function is called when F is destroyed. */ | |
2504 | ||
2505 | void | |
2506 | free_glyphs (f) | |
2507 | struct frame *f; | |
2508 | { | |
2509 | if (f && f->glyphs_initialized_p) | |
2510 | { | |
42f55fe0 GM |
2511 | /* Block interrupt input so that we don't get surprised by an X |
2512 | event while we're in an inconsistent state. */ | |
2513 | BLOCK_INPUT; | |
5f5c8ee5 | 2514 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2515 | |
5f5c8ee5 GM |
2516 | /* Release window sub-matrices. */ |
2517 | if (!NILP (f->root_window)) | |
2518 | free_window_matrices (XWINDOW (f->root_window)); | |
2519 | ||
2520 | /* Free the dummy window for menu bars without X toolkit and its | |
2521 | glyph matrices. */ | |
2522 | if (!NILP (f->menu_bar_window)) | |
2523 | { | |
2524 | struct window *w = XWINDOW (f->menu_bar_window); | |
2525 | free_glyph_matrix (w->desired_matrix); | |
2526 | free_glyph_matrix (w->current_matrix); | |
2527 | w->desired_matrix = w->current_matrix = NULL; | |
2528 | f->menu_bar_window = Qnil; | |
2529 | } | |
2530 | ||
9ea173e8 GM |
2531 | /* Free the tool bar window and its glyph matrices. */ |
2532 | if (!NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2533 | { |
9ea173e8 | 2534 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2535 | free_glyph_matrix (w->desired_matrix); |
2536 | free_glyph_matrix (w->current_matrix); | |
2537 | w->desired_matrix = w->current_matrix = NULL; | |
9ea173e8 | 2538 | f->tool_bar_window = Qnil; |
5f5c8ee5 GM |
2539 | } |
2540 | ||
2541 | /* Release frame glyph matrices. Reset fields to zero in | |
2542 | case we are called a second time. */ | |
2543 | if (f->desired_matrix) | |
2544 | { | |
2545 | free_glyph_matrix (f->desired_matrix); | |
2546 | free_glyph_matrix (f->current_matrix); | |
2547 | f->desired_matrix = f->current_matrix = NULL; | |
2548 | } | |
2549 | ||
2550 | /* Release glyph pools. */ | |
2551 | if (f->desired_pool) | |
2552 | { | |
2553 | free_glyph_pool (f->desired_pool); | |
2554 | free_glyph_pool (f->current_pool); | |
2555 | f->desired_pool = f->current_pool = NULL; | |
2556 | } | |
177c0ea7 | 2557 | |
42f55fe0 | 2558 | UNBLOCK_INPUT; |
5f5c8ee5 GM |
2559 | } |
2560 | } | |
2561 | ||
2562 | ||
2563 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2564 | function may be called with a null pointer, and it may be called on | |
2565 | the same tree more than once. */ | |
2566 | ||
2567 | void | |
2568 | free_window_matrices (w) | |
2569 | struct window *w; | |
2570 | { | |
2571 | while (w) | |
2572 | { | |
2573 | if (!NILP (w->hchild)) | |
2574 | free_window_matrices (XWINDOW (w->hchild)); | |
2575 | else if (!NILP (w->vchild)) | |
2576 | free_window_matrices (XWINDOW (w->vchild)); | |
177c0ea7 | 2577 | else |
5f5c8ee5 GM |
2578 | { |
2579 | /* This is a leaf window. Free its memory and reset fields | |
2580 | to zero in case this function is called a second time for | |
2581 | W. */ | |
2582 | free_glyph_matrix (w->current_matrix); | |
2583 | free_glyph_matrix (w->desired_matrix); | |
2584 | w->current_matrix = w->desired_matrix = NULL; | |
2585 | } | |
2586 | ||
2587 | /* Next window on same level. */ | |
2588 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2589 | } | |
2590 | } | |
2591 | ||
2592 | ||
2593 | /* Check glyph memory leaks. This function is called from | |
2594 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2595 | exits. We therefore free all glyph memory for all active frames | |
2596 | explicitly and check that nothing is left allocated. */ | |
2597 | ||
2598 | void | |
2599 | check_glyph_memory () | |
2600 | { | |
2601 | Lisp_Object tail, frame; | |
2602 | ||
2603 | /* Free glyph memory for all frames. */ | |
2604 | FOR_EACH_FRAME (tail, frame) | |
2605 | free_glyphs (XFRAME (frame)); | |
2606 | ||
2607 | /* Check that nothing is left allocated. */ | |
2608 | if (glyph_matrix_count) | |
2609 | abort (); | |
2610 | if (glyph_pool_count) | |
2611 | abort (); | |
2612 | } | |
2613 | ||
2614 | ||
2615 | \f | |
2616 | /********************************************************************** | |
2617 | Building a Frame Matrix | |
2618 | **********************************************************************/ | |
2619 | ||
2620 | /* Most of the redisplay code works on glyph matrices attached to | |
2621 | windows. This is a good solution most of the time, but it is not | |
2622 | suitable for terminal code. Terminal output functions cannot rely | |
2623 | on being able to set an arbitrary terminal window. Instead they | |
2624 | must be provided with a view of the whole frame, i.e. the whole | |
2625 | screen. We build such a view by constructing a frame matrix from | |
2626 | window matrices in this section. | |
2627 | ||
2628 | Windows that must be updated have their must_be_update_p flag set. | |
2629 | For all such windows, their desired matrix is made part of the | |
2630 | desired frame matrix. For other windows, their current matrix is | |
2631 | made part of the desired frame matrix. | |
2632 | ||
2633 | +-----------------+----------------+ | |
2634 | | desired | desired | | |
2635 | | | | | |
2636 | +-----------------+----------------+ | |
2637 | | current | | |
2638 | | | | |
2639 | +----------------------------------+ | |
2640 | ||
2641 | Desired window matrices can be made part of the frame matrix in a | |
2642 | cheap way: We exploit the fact that the desired frame matrix and | |
2643 | desired window matrices share their glyph memory. This is not | |
2644 | possible for current window matrices. Their glyphs are copied to | |
2645 | the desired frame matrix. The latter is equivalent to | |
2646 | preserve_other_columns in the old redisplay. | |
2647 | ||
2648 | Used glyphs counters for frame matrix rows are the result of adding | |
2649 | up glyph lengths of the window matrices. A line in the frame | |
2650 | matrix is enabled, if a corresponding line in a window matrix is | |
2651 | enabled. | |
177c0ea7 | 2652 | |
5f5c8ee5 GM |
2653 | After building the desired frame matrix, it will be passed to |
2654 | terminal code, which will manipulate both the desired and current | |
2655 | frame matrix. Changes applied to the frame's current matrix have | |
2656 | to be visible in current window matrices afterwards, of course. | |
2657 | ||
2658 | This problem is solved like this: | |
2659 | ||
2660 | 1. Window and frame matrices share glyphs. Window matrices are | |
2661 | constructed in a way that their glyph contents ARE the glyph | |
2662 | contents needed in a frame matrix. Thus, any modification of | |
2663 | glyphs done in terminal code will be reflected in window matrices | |
2664 | automatically. | |
177c0ea7 | 2665 | |
5f5c8ee5 GM |
2666 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2667 | intercepted by hook functions so that corresponding row operations | |
2668 | on window matrices can be performed. This is necessary because we | |
2669 | use pointers to glyphs in glyph row structures. To satisfy the | |
2670 | assumption of point 1 above that glyphs are updated implicitly in | |
2671 | window matrices when they are manipulated via the frame matrix, | |
2672 | window and frame matrix must of course agree where to find the | |
2673 | glyphs for their rows. Possible manipulations that must be | |
2674 | mirrored are assignments of rows of the desired frame matrix to the | |
2675 | current frame matrix and scrolling the current frame matrix. */ | |
2676 | ||
2677 | /* Build frame F's desired matrix from window matrices. Only windows | |
2678 | which have the flag must_be_updated_p set have to be updated. Menu | |
2679 | bar lines of a frame are not covered by window matrices, so make | |
2680 | sure not to touch them in this function. */ | |
2681 | ||
2682 | static void | |
2683 | build_frame_matrix (f) | |
2684 | struct frame *f; | |
2685 | { | |
2686 | int i; | |
2687 | ||
2688 | /* F must have a frame matrix when this function is called. */ | |
2689 | xassert (!FRAME_WINDOW_P (f)); | |
177c0ea7 | 2690 | |
5f5c8ee5 GM |
2691 | /* Clear all rows in the frame matrix covered by window matrices. |
2692 | Menu bar lines are not covered by windows. */ | |
2693 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2694 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2695 | ||
2696 | /* Build the matrix by walking the window tree. */ | |
2697 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2698 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2699 | } | |
2700 | ||
2701 | ||
2702 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2703 | matrices. W is the root of a window tree. */ | |
2704 | ||
2705 | static void | |
2706 | build_frame_matrix_from_window_tree (matrix, w) | |
2707 | struct glyph_matrix *matrix; | |
2708 | struct window *w; | |
2709 | { | |
2710 | while (w) | |
2711 | { | |
2712 | if (!NILP (w->hchild)) | |
2713 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->hchild)); | |
2714 | else if (!NILP (w->vchild)) | |
2715 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->vchild)); | |
2716 | else | |
2717 | build_frame_matrix_from_leaf_window (matrix, w); | |
2718 | ||
2719 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2720 | } | |
2721 | } | |
2722 | ||
2723 | ||
2724 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2725 | desired frame matrix built. W is a leaf window whose desired or | |
2726 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2727 | must_be_updated_p determines which matrix it contributes to | |
2728 | FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix | |
2729 | is added to FRAME_MATRIX, otherwise W's current matrix is added. | |
2730 | Adding a desired matrix means setting up used counters and such in | |
2731 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2732 | means copying glyphs. The latter case corresponds to | |
2733 | preserve_other_columns in the old redisplay. */ | |
2734 | ||
2735 | static void | |
2736 | build_frame_matrix_from_leaf_window (frame_matrix, w) | |
2737 | struct glyph_matrix *frame_matrix; | |
2738 | struct window *w; | |
2739 | { | |
2740 | struct glyph_matrix *window_matrix; | |
2741 | int window_y, frame_y; | |
2742 | /* If non-zero, a glyph to insert at the right border of W. */ | |
2743 | GLYPH right_border_glyph = 0; | |
2744 | ||
2745 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2746 | if (w->must_be_updated_p) | |
2747 | { | |
2748 | window_matrix = w->desired_matrix; | |
2749 | ||
2750 | /* Decide whether we want to add a vertical border glyph. */ | |
2751 | if (!WINDOW_RIGHTMOST_P (w)) | |
2752 | { | |
2753 | struct Lisp_Char_Table *dp = window_display_table (w); | |
b4e49aee MB |
2754 | |
2755 | right_border_glyph | |
2756 | = ((dp && INTEGERP (DISP_BORDER_GLYPH (dp))) | |
2757 | ? spec_glyph_lookup_face (w, XINT (DISP_BORDER_GLYPH (dp))) | |
2758 | : '|'); | |
2759 | ||
2760 | if (FAST_GLYPH_FACE (right_border_glyph) <= 0) | |
2761 | right_border_glyph | |
53abc3bf | 2762 | = FAST_MAKE_GLYPH (right_border_glyph, VERTICAL_BORDER_FACE_ID); |
5f5c8ee5 GM |
2763 | } |
2764 | } | |
2765 | else | |
2766 | window_matrix = w->current_matrix; | |
2767 | ||
2768 | /* For all rows in the window matrix and corresponding rows in the | |
2769 | frame matrix. */ | |
2770 | window_y = 0; | |
2771 | frame_y = window_matrix->matrix_y; | |
2772 | while (window_y < window_matrix->nrows) | |
2773 | { | |
2774 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2775 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
2a8bd25f | 2776 | int current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2777 | |
2778 | /* Fill up the frame row with spaces up to the left margin of the | |
2779 | window row. */ | |
2780 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2781 | ||
2782 | /* Fill up areas in the window matrix row with spaces. */ | |
2783 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2784 | |
2785 | /* If only part of W's desired matrix has been built, and | |
2786 | window_row wasn't displayed, use the corresponding current | |
2787 | row instead. */ | |
2788 | if (window_matrix == w->desired_matrix | |
2789 | && !window_row->enabled_p) | |
2790 | { | |
2791 | window_row = w->current_matrix->rows + window_y; | |
2792 | current_row_p = 1; | |
2793 | } | |
177c0ea7 | 2794 | |
2a8bd25f | 2795 | if (current_row_p) |
5f5c8ee5 | 2796 | { |
2a8bd25f | 2797 | /* Copy window row to frame row. */ |
5f5c8ee5 GM |
2798 | bcopy (window_row->glyphs[0], |
2799 | frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, | |
2800 | window_matrix->matrix_w * sizeof (struct glyph)); | |
2801 | } | |
2802 | else | |
2803 | { | |
2a8bd25f | 2804 | xassert (window_row->enabled_p); |
177c0ea7 | 2805 | |
2a8bd25f GM |
2806 | /* Only when a desired row has been displayed, we want |
2807 | the corresponding frame row to be updated. */ | |
2808 | frame_row->enabled_p = 1; | |
177c0ea7 | 2809 | |
5f5c8ee5 GM |
2810 | /* Maybe insert a vertical border between horizontally adjacent |
2811 | windows. */ | |
2812 | if (right_border_glyph) | |
2813 | { | |
2814 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2815 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2816 | } | |
2817 | ||
beb41cf7 | 2818 | #if GLYPH_DEBUG |
a13396c9 GM |
2819 | /* Window row window_y must be a slice of frame row |
2820 | frame_y. */ | |
5f5c8ee5 | 2821 | xassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2822 | |
5f5c8ee5 GM |
2823 | /* If rows are in sync, we don't have to copy glyphs because |
2824 | frame and window share glyphs. */ | |
177c0ea7 | 2825 | |
a38634ff | 2826 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2827 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2828 | #endif |
5f5c8ee5 GM |
2829 | } |
2830 | ||
2831 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2832 | up with spaces, and visit leaf windows from left to right it | |
2833 | can be done simply. */ | |
177c0ea7 | 2834 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2835 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2836 | ||
5f5c8ee5 GM |
2837 | /* Next row. */ |
2838 | ++window_y; | |
2839 | ++frame_y; | |
2840 | } | |
2841 | } | |
2842 | ||
5f81871e RS |
2843 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2844 | ID, return a glyph that has a realized face ID. | |
2845 | This is used for glyphs displayed specially and not part of the text; | |
2846 | for instance, vertical separators, truncation markers, etc. */ | |
2847 | ||
2848 | GLYPH | |
2849 | spec_glyph_lookup_face (w, glyph) | |
2850 | struct window *w; | |
2851 | GLYPH glyph; | |
2852 | { | |
2853 | int lface_id = FAST_GLYPH_FACE (glyph); | |
2854 | /* Convert the glyph's specified face to a realized (cache) face. */ | |
2855 | if (lface_id > 0) | |
2856 | { | |
2857 | int face_id = merge_faces (XFRAME (w->frame), | |
2858 | Qt, lface_id, DEFAULT_FACE_ID); | |
2859 | glyph | |
2860 | = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (glyph), face_id); | |
2861 | } | |
2862 | return glyph; | |
2863 | } | |
5f5c8ee5 GM |
2864 | |
2865 | /* Add spaces to a glyph row ROW in a window matrix. | |
2866 | ||
2867 | Each row has the form: | |
2868 | ||
2869 | +---------+-----------------------------+------------+ | |
2870 | | left | text | right | | |
2871 | +---------+-----------------------------+------------+ | |
2872 | ||
2873 | Left and right marginal areas are optional. This function adds | |
2874 | spaces to areas so that there are no empty holes between areas. | |
2875 | In other words: If the right area is not empty, the text area | |
2876 | is filled up with spaces up to the right area. If the text area | |
2877 | is not empty, the left area is filled up. | |
2878 | ||
2879 | To be called for frame-based redisplay, only. */ | |
2880 | ||
2881 | static void | |
2882 | fill_up_glyph_row_with_spaces (row) | |
2883 | struct glyph_row *row; | |
2884 | { | |
2885 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2886 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2887 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2888 | } | |
2889 | ||
2890 | ||
2891 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2892 | frame-based redisplay only. */ | |
2893 | ||
2894 | static void | |
2895 | fill_up_glyph_row_area_with_spaces (row, area) | |
2896 | struct glyph_row *row; | |
2897 | int area; | |
2898 | { | |
2899 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2900 | { | |
2901 | struct glyph *end = row->glyphs[area + 1]; | |
2902 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2903 | ||
2904 | while (text < end) | |
2905 | *text++ = space_glyph; | |
2906 | row->used[area] = text - row->glyphs[area]; | |
2907 | } | |
2908 | } | |
2909 | ||
2910 | ||
2911 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2912 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2913 | ||
2914 | static void | |
2915 | fill_up_frame_row_with_spaces (row, upto) | |
2916 | struct glyph_row *row; | |
2917 | int upto; | |
2918 | { | |
2919 | int i = row->used[TEXT_AREA]; | |
2920 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2921 | |
5f5c8ee5 GM |
2922 | while (i < upto) |
2923 | glyph[i++] = space_glyph; | |
2924 | ||
2925 | row->used[TEXT_AREA] = i; | |
2926 | } | |
2927 | ||
2928 | ||
2929 | \f | |
2930 | /********************************************************************** | |
2931 | Mirroring operations on frame matrices in window matrices | |
2932 | **********************************************************************/ | |
2933 | ||
2934 | /* Set frame being updated via frame-based redisplay to F. This | |
2935 | function must be called before updates to make explicit that we are | |
2936 | working on frame matrices or not. */ | |
2937 | ||
2938 | static INLINE void | |
2939 | set_frame_matrix_frame (f) | |
2940 | struct frame *f; | |
2941 | { | |
2942 | frame_matrix_frame = f; | |
2943 | } | |
2944 | ||
2945 | ||
2946 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2947 | DESIRED_MATRIX is the desired matrix corresponding to | |
2948 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2949 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2950 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2951 | done in frame matrices, and that we have to perform analogous | |
2952 | operations in window matrices of frame_matrix_frame. */ | |
2953 | ||
2954 | static INLINE void | |
2955 | make_current (desired_matrix, current_matrix, row) | |
2956 | struct glyph_matrix *desired_matrix, *current_matrix; | |
2957 | int row; | |
2958 | { | |
2959 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2960 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
e876ff42 | 2961 | int mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2962 | |
2963 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2964 | between both rows, and does a structure assignment otherwise. */ | |
2965 | assign_row (current_row, desired_row); | |
2966 | ||
2967 | /* Enable current_row to mark it as valid. */ | |
2968 | current_row->enabled_p = 1; | |
e876ff42 | 2969 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2970 | |
2971 | /* If we are called on frame matrices, perform analogous operations | |
2972 | for window matrices. */ | |
2973 | if (frame_matrix_frame) | |
2974 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); | |
2975 | } | |
2976 | ||
2977 | ||
2978 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2979 | W's frame which has been made current (by swapping pointers between | |
2980 | current and desired matrix). Perform analogous operations in the | |
2981 | matrices of leaf windows in the window tree rooted at W. */ | |
2982 | ||
2983 | static void | |
2984 | mirror_make_current (w, frame_row) | |
2985 | struct window *w; | |
2986 | int frame_row; | |
2987 | { | |
2988 | while (w) | |
2989 | { | |
2990 | if (!NILP (w->hchild)) | |
2991 | mirror_make_current (XWINDOW (w->hchild), frame_row); | |
2992 | else if (!NILP (w->vchild)) | |
2993 | mirror_make_current (XWINDOW (w->vchild), frame_row); | |
2994 | else | |
2995 | { | |
2996 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2997 | here because the checks performed in debug mode there | |
2998 | will not allow the conversion. */ | |
2999 | int row = frame_row - w->desired_matrix->matrix_y; | |
3000 | ||
3001 | /* If FRAME_ROW is within W, assign the desired row to the | |
3002 | current row (exchanging glyph pointers). */ | |
3003 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
3004 | { | |
3005 | struct glyph_row *current_row | |
3006 | = MATRIX_ROW (w->current_matrix, row); | |
3007 | struct glyph_row *desired_row | |
3008 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
3009 | |
3010 | if (desired_row->enabled_p) | |
3011 | assign_row (current_row, desired_row); | |
3012 | else | |
3013 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 GM |
3014 | current_row->enabled_p = 1; |
3015 | } | |
3016 | } | |
177c0ea7 | 3017 | |
5f5c8ee5 GM |
3018 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3019 | } | |
3020 | } | |
3021 | ||
3022 | ||
3023 | /* Perform row dance after scrolling. We are working on the range of | |
3024 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
3025 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
3026 | row I in the range 0 <= I < NLINES, the index of the original line | |
3027 | to move to I. This index is relative to the row range, i.e. 0 <= | |
3028 | index < NLINES. RETAINED_P is a vector containing zero for each | |
3029 | row 0 <= I < NLINES which is empty. | |
3030 | ||
3031 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 3032 | |
5f5c8ee5 GM |
3033 | void |
3034 | mirrored_line_dance (matrix, unchanged_at_top, nlines, copy_from, | |
3035 | retained_p) | |
3036 | struct glyph_matrix *matrix; | |
3037 | int unchanged_at_top, nlines; | |
3038 | int *copy_from; | |
3039 | char *retained_p; | |
3040 | { | |
3041 | /* A copy of original rows. */ | |
3042 | struct glyph_row *old_rows; | |
3043 | ||
3044 | /* Rows to assign to. */ | |
3045 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 3046 | |
5f5c8ee5 GM |
3047 | int i; |
3048 | ||
3049 | /* Make a copy of the original rows. */ | |
3050 | old_rows = (struct glyph_row *) alloca (nlines * sizeof *old_rows); | |
3051 | bcopy (new_rows, old_rows, nlines * sizeof *old_rows); | |
3052 | ||
3053 | /* Assign new rows, maybe clear lines. */ | |
3054 | for (i = 0; i < nlines; ++i) | |
3055 | { | |
3056 | int enabled_before_p = new_rows[i].enabled_p; | |
3057 | ||
3058 | xassert (i + unchanged_at_top < matrix->nrows); | |
3059 | xassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
3060 | new_rows[i] = old_rows[copy_from[i]]; | |
3061 | new_rows[i].enabled_p = enabled_before_p; | |
3062 | ||
3063 | /* RETAINED_P is zero for empty lines. */ | |
3064 | if (!retained_p[copy_from[i]]) | |
3065 | new_rows[i].enabled_p = 0; | |
3066 | } | |
3067 | ||
153a073c | 3068 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 GM |
3069 | if (frame_matrix_frame) |
3070 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), | |
3071 | unchanged_at_top, nlines, copy_from, retained_p); | |
3072 | } | |
3073 | ||
3074 | ||
a13396c9 | 3075 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 3076 | the current frame matrix. */ |
a13396c9 GM |
3077 | |
3078 | static void | |
3079 | sync_window_with_frame_matrix_rows (w) | |
3080 | struct window *w; | |
3081 | { | |
3082 | struct frame *f = XFRAME (w->frame); | |
3083 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
075c507b | 3084 | int left, right, x, width; |
a13396c9 | 3085 | |
5cb88111 | 3086 | /* Preconditions: W must be a leaf window on a tty frame. */ |
a13396c9 | 3087 | xassert (NILP (w->hchild) && NILP (w->vchild)); |
a13396c9 GM |
3088 | xassert (!FRAME_WINDOW_P (f)); |
3089 | ||
7df02016 KS |
3090 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
3091 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
3092 | x = w->current_matrix->matrix_x; |
3093 | width = w->current_matrix->matrix_w; | |
3094 | ||
a13396c9 GM |
3095 | window_row = w->current_matrix->rows; |
3096 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 3097 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 3098 | |
5cb88111 | 3099 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 3100 | { |
5cb88111 GM |
3101 | window_row->glyphs[LEFT_MARGIN_AREA] |
3102 | = frame_row->glyphs[0] + x; | |
3103 | window_row->glyphs[TEXT_AREA] | |
3104 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
3105 | window_row->glyphs[LAST_AREA] | |
3106 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
3107 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
3108 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
3109 | } |
3110 | } | |
3111 | ||
3112 | ||
3113 | /* Return the window in the window tree rooted in W containing frame | |
3114 | row ROW. Value is null if none is found. */ | |
3115 | ||
3116 | struct window * | |
3117 | frame_row_to_window (w, row) | |
3118 | struct window *w; | |
3119 | int row; | |
3120 | { | |
3121 | struct window *found = NULL; | |
177c0ea7 | 3122 | |
a13396c9 GM |
3123 | while (w && !found) |
3124 | { | |
3125 | if (!NILP (w->hchild)) | |
3126 | found = frame_row_to_window (XWINDOW (w->hchild), row); | |
3127 | else if (!NILP (w->vchild)) | |
3128 | found = frame_row_to_window (XWINDOW (w->vchild), row); | |
7df02016 KS |
3129 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
3130 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 3131 | found = w; |
177c0ea7 | 3132 | |
a13396c9 GM |
3133 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3134 | } | |
3135 | ||
3136 | return found; | |
3137 | } | |
3138 | ||
3139 | ||
5f5c8ee5 GM |
3140 | /* Perform a line dance in the window tree rooted at W, after |
3141 | scrolling a frame matrix in mirrored_line_dance. | |
3142 | ||
3143 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
3144 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
3145 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
3146 | I < NLINES, the index of the original line to move to I. This | |
3147 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
3148 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
3149 | which is empty. */ | |
3150 | ||
3151 | static void | |
3152 | mirror_line_dance (w, unchanged_at_top, nlines, copy_from, retained_p) | |
3153 | struct window *w; | |
3154 | int unchanged_at_top, nlines; | |
3155 | int *copy_from; | |
3156 | char *retained_p; | |
3157 | { | |
3158 | while (w) | |
3159 | { | |
3160 | if (!NILP (w->hchild)) | |
3161 | mirror_line_dance (XWINDOW (w->hchild), unchanged_at_top, | |
3162 | nlines, copy_from, retained_p); | |
3163 | else if (!NILP (w->vchild)) | |
3164 | mirror_line_dance (XWINDOW (w->vchild), unchanged_at_top, | |
3165 | nlines, copy_from, retained_p); | |
3166 | else | |
3167 | { | |
3168 | /* W is a leaf window, and we are working on its current | |
3169 | matrix m. */ | |
3170 | struct glyph_matrix *m = w->current_matrix; | |
a13396c9 | 3171 | int i, sync_p = 0; |
5f5c8ee5 GM |
3172 | struct glyph_row *old_rows; |
3173 | ||
3174 | /* Make a copy of the original rows of matrix m. */ | |
3175 | old_rows = (struct glyph_row *) alloca (m->nrows * sizeof *old_rows); | |
3176 | bcopy (m->rows, old_rows, m->nrows * sizeof *old_rows); | |
3177 | ||
3178 | for (i = 0; i < nlines; ++i) | |
3179 | { | |
3180 | /* Frame relative line assigned to. */ | |
3181 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 3182 | |
5f5c8ee5 GM |
3183 | /* Frame relative line assigned. */ |
3184 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 3185 | |
5f5c8ee5 GM |
3186 | /* Window relative line assigned to. */ |
3187 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 3188 | |
5f5c8ee5 GM |
3189 | /* Window relative line assigned. */ |
3190 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 3191 | |
5f5c8ee5 GM |
3192 | /* Is assigned line inside window? */ |
3193 | int from_inside_window_p | |
3194 | = window_from >= 0 && window_from < m->matrix_h; | |
177c0ea7 | 3195 | |
a13396c9 GM |
3196 | /* Is assigned to line inside window? */ |
3197 | int to_inside_window_p | |
3198 | = window_to >= 0 && window_to < m->matrix_h; | |
177c0ea7 | 3199 | |
a13396c9 | 3200 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 3201 | { |
5f5c8ee5 GM |
3202 | /* Enabled setting before assignment. */ |
3203 | int enabled_before_p; | |
177c0ea7 | 3204 | |
5f5c8ee5 GM |
3205 | /* Do the assignment. The enabled_p flag is saved |
3206 | over the assignment because the old redisplay did | |
3207 | that. */ | |
3208 | enabled_before_p = m->rows[window_to].enabled_p; | |
3209 | m->rows[window_to] = old_rows[window_from]; | |
3210 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 3211 | |
5f5c8ee5 GM |
3212 | /* If frame line is empty, window line is empty, too. */ |
3213 | if (!retained_p[copy_from[i]]) | |
3214 | m->rows[window_to].enabled_p = 0; | |
3215 | } | |
a13396c9 GM |
3216 | else if (to_inside_window_p) |
3217 | { | |
3218 | /* A copy between windows. This is an infrequent | |
3219 | case not worth optimizing. */ | |
3220 | struct frame *f = XFRAME (w->frame); | |
3221 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); | |
3222 | struct window *w2; | |
3223 | struct glyph_matrix *m2; | |
3224 | int m2_from; | |
3225 | ||
fe8b8401 | 3226 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
3227 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
3228 | -nw', FROM_FRAME sometimes has no associated window. | |
3229 | This check avoids a segfault if W2 is null. */ | |
3230 | if (w2) | |
3231 | { | |
3232 | m2 = w2->current_matrix; | |
3233 | m2_from = frame_from - m2->matrix_y; | |
3234 | copy_row_except_pointers (m->rows + window_to, | |
3235 | m2->rows + m2_from); | |
3236 | ||
3237 | /* If frame line is empty, window line is empty, too. */ | |
3238 | if (!retained_p[copy_from[i]]) | |
3239 | m->rows[window_to].enabled_p = 0; | |
3240 | } | |
a13396c9 GM |
3241 | sync_p = 1; |
3242 | } | |
3243 | else if (from_inside_window_p) | |
3244 | sync_p = 1; | |
5f5c8ee5 | 3245 | } |
a13396c9 GM |
3246 | |
3247 | /* If there was a copy between windows, make sure glyph | |
3248 | pointers are in sync with the frame matrix. */ | |
3249 | if (sync_p) | |
3250 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 3251 | |
5f5c8ee5 GM |
3252 | /* Check that no pointers are lost. */ |
3253 | CHECK_MATRIX (m); | |
3254 | } | |
3255 | ||
3256 | /* Next window on same level. */ | |
3257 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3258 | } | |
3259 | } | |
3260 | ||
3261 | ||
3262 | #if GLYPH_DEBUG | |
3263 | ||
3264 | /* Check that window and frame matrices agree about their | |
3265 | understanding where glyphs of the rows are to find. For each | |
3266 | window in the window tree rooted at W, check that rows in the | |
3267 | matrices of leaf window agree with their frame matrices about | |
3268 | glyph pointers. */ | |
3269 | ||
3270 | void | |
3271 | check_window_matrix_pointers (w) | |
3272 | struct window *w; | |
3273 | { | |
3274 | while (w) | |
3275 | { | |
3276 | if (!NILP (w->hchild)) | |
3277 | check_window_matrix_pointers (XWINDOW (w->hchild)); | |
3278 | else if (!NILP (w->vchild)) | |
3279 | check_window_matrix_pointers (XWINDOW (w->vchild)); | |
3280 | else | |
60a8948a | 3281 | { |
5f5c8ee5 GM |
3282 | struct frame *f = XFRAME (w->frame); |
3283 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); | |
3284 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 3285 | } |
177c0ea7 | 3286 | |
5f5c8ee5 GM |
3287 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3288 | } | |
3289 | } | |
3290 | ||
3291 | ||
3292 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
3293 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
3294 | each row in WINDOW_MATRIX check that it's a slice of the | |
3295 | corresponding frame row. If it isn't, abort. */ | |
3296 | ||
3297 | static void | |
3298 | check_matrix_pointers (window_matrix, frame_matrix) | |
3299 | struct glyph_matrix *window_matrix, *frame_matrix; | |
3300 | { | |
3301 | /* Row number in WINDOW_MATRIX. */ | |
3302 | int i = 0; | |
3303 | ||
3304 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
3305 | int j = window_matrix->matrix_y; | |
3306 | ||
177c0ea7 | 3307 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
3308 | slice of the row in the frame matrix. If it isn't we didn't |
3309 | mirror an operation on the frame matrix correctly. */ | |
3310 | while (i < window_matrix->nrows) | |
3311 | { | |
3312 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
3313 | frame_matrix->rows + j)) | |
3314 | abort (); | |
3315 | ++i, ++j; | |
3316 | } | |
3317 | } | |
3318 | ||
3319 | #endif /* GLYPH_DEBUG != 0 */ | |
3320 | ||
3321 | ||
3322 | \f | |
3323 | /********************************************************************** | |
3324 | VPOS and HPOS translations | |
3325 | **********************************************************************/ | |
3326 | ||
3327 | #if GLYPH_DEBUG | |
3328 | ||
3329 | /* Translate vertical position VPOS which is relative to window W to a | |
3330 | vertical position relative to W's frame. */ | |
3331 | ||
3332 | static int | |
3333 | window_to_frame_vpos (w, vpos) | |
3334 | struct window *w; | |
3335 | int vpos; | |
3336 | { | |
3337 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 3338 | |
5f5c8ee5 GM |
3339 | xassert (!FRAME_WINDOW_P (f)); |
3340 | xassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); | |
7df02016 KS |
3341 | vpos += WINDOW_TOP_EDGE_LINE (w); |
3342 | xassert (vpos >= 0 && vpos <= FRAME_LINES (f)); | |
5f5c8ee5 GM |
3343 | return vpos; |
3344 | } | |
3345 | ||
3346 | ||
3347 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 3348 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
3349 | |
3350 | static int | |
3351 | window_to_frame_hpos (w, hpos) | |
3352 | struct window *w; | |
3353 | int hpos; | |
3354 | { | |
82f4a138 | 3355 | xassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 3356 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
3357 | return hpos; |
3358 | } | |
177c0ea7 | 3359 | |
5f5c8ee5 GM |
3360 | #endif /* GLYPH_DEBUG */ |
3361 | ||
3362 | ||
3363 | \f | |
3364 | /********************************************************************** | |
3365 | Redrawing Frames | |
3366 | **********************************************************************/ | |
3367 | ||
3368 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, | |
7ee72033 MB |
3369 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. */) |
3370 | (frame) | |
5f5c8ee5 GM |
3371 | Lisp_Object frame; |
3372 | { | |
3373 | struct frame *f; | |
3374 | ||
b7826503 | 3375 | CHECK_LIVE_FRAME (frame); |
5f5c8ee5 GM |
3376 | f = XFRAME (frame); |
3377 | ||
3378 | /* Ignore redraw requests, if frame has no glyphs yet. | |
3379 | (Implementation note: It still has to be checked why we are | |
3380 | called so early here). */ | |
3381 | if (!glyphs_initialized_initially_p) | |
3382 | return Qnil; | |
3383 | ||
3384 | update_begin (f); | |
3224dac1 | 3385 | #ifdef MSDOS |
f2adda5e | 3386 | if (FRAME_MSDOS_P (f)) |
6ed8eeff | 3387 | set_terminal_modes (FRAME_TERMINAL (f)); |
3224dac1 | 3388 | #endif |
385ed61f | 3389 | clear_frame (f); |
5f5c8ee5 GM |
3390 | clear_current_matrices (f); |
3391 | update_end (f); | |
daf01701 | 3392 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3393 | fflush (FRAME_TTY (f)->output); |
5f5c8ee5 GM |
3394 | windows_or_buffers_changed++; |
3395 | /* Mark all windows as inaccurate, so that every window will have | |
3396 | its redisplay done. */ | |
3397 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
3398 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
3399 | f->garbaged = 0; | |
3400 | return Qnil; | |
3401 | } | |
3402 | ||
3403 | ||
3404 | /* Redraw frame F. This is nothing more than a call to the Lisp | |
3405 | function redraw-frame. */ | |
3406 | ||
3407 | void | |
3408 | redraw_frame (f) | |
3409 | struct frame *f; | |
3410 | { | |
3411 | Lisp_Object frame; | |
3412 | XSETFRAME (frame, f); | |
3413 | Fredraw_frame (frame); | |
3414 | } | |
3415 | ||
3416 | ||
3417 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
7ee72033 MB |
3418 | doc: /* Clear and redisplay all visible frames. */) |
3419 | () | |
5f5c8ee5 GM |
3420 | { |
3421 | Lisp_Object tail, frame; | |
3422 | ||
3423 | FOR_EACH_FRAME (tail, frame) | |
3424 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
3425 | Fredraw_frame (frame); | |
3426 | ||
3427 | return Qnil; | |
3428 | } | |
3429 | ||
3430 | ||
3431 | /* This is used when frame_garbaged is set. Call Fredraw_frame on all | |
3432 | visible frames marked as garbaged. */ | |
3433 | ||
3434 | void | |
3435 | redraw_garbaged_frames () | |
3436 | { | |
3437 | Lisp_Object tail, frame; | |
3438 | ||
3439 | FOR_EACH_FRAME (tail, frame) | |
3440 | if (FRAME_VISIBLE_P (XFRAME (frame)) | |
3441 | && FRAME_GARBAGED_P (XFRAME (frame))) | |
3442 | Fredraw_frame (frame); | |
3443 | } | |
3444 | ||
3445 | ||
3446 | \f | |
3447 | /*********************************************************************** | |
3448 | Direct Operations | |
3449 | ***********************************************************************/ | |
3450 | ||
3451 | /* Try to update display and current glyph matrix directly. | |
3452 | ||
3453 | This function is called after a character G has been inserted into | |
3454 | current_buffer. It tries to update the current glyph matrix and | |
3455 | perform appropriate screen output to reflect the insertion. If it | |
3456 | succeeds, the global flag redisplay_performed_directly_p will be | |
3457 | set to 1, and thereby prevent the more costly general redisplay | |
3458 | from running (see redisplay_internal). | |
3459 | ||
3460 | This function is not called for `hairy' character insertions. | |
3461 | In particular, it is not called when after or before change | |
3462 | functions exist, like they are used by font-lock. See keyboard.c | |
3463 | for details where this function is called. */ | |
3464 | ||
3465 | int | |
3466 | direct_output_for_insert (g) | |
3467 | int g; | |
3468 | { | |
91fb7e1b | 3469 | register struct frame *f = SELECTED_FRAME (); |
5f5c8ee5 GM |
3470 | struct window *w = XWINDOW (selected_window); |
3471 | struct it it, it2; | |
3472 | struct glyph_row *glyph_row; | |
3473 | struct glyph *glyphs, *glyph, *end; | |
3474 | int n; | |
153a073c | 3475 | /* Non-null means that redisplay of W is based on window matrices. */ |
5f5c8ee5 GM |
3476 | int window_redisplay_p = FRAME_WINDOW_P (f); |
3477 | /* Non-null means we are in overwrite mode. */ | |
3478 | int overwrite_p = !NILP (current_buffer->overwrite_mode); | |
3479 | int added_width; | |
3480 | struct text_pos pos; | |
3481 | int delta, delta_bytes; | |
3482 | ||
3483 | /* Not done directly. */ | |
3484 | redisplay_performed_directly_p = 0; | |
3485 | ||
3486 | /* Quickly give up for some common cases. */ | |
3487 | if (cursor_in_echo_area | |
3488 | /* Give up if fonts have changed. */ | |
3489 | || fonts_changed_p | |
3490 | /* Give up if face attributes have been changed. */ | |
3491 | || face_change_count | |
3492 | /* Give up if cursor position not really known. */ | |
3493 | || !display_completed | |
3494 | /* Give up if buffer appears in two places. */ | |
3495 | || buffer_shared > 1 | |
c74e645b GM |
3496 | /* Give up if currently displaying a message instead of the |
3497 | minibuffer contents. */ | |
3498 | || (EQ (selected_window, minibuf_window) | |
3499 | && EQ (minibuf_window, echo_area_window)) | |
5f5c8ee5 GM |
3500 | /* Give up for hscrolled mini-buffer because display of the prompt |
3501 | is handled specially there (see display_line). */ | |
3502 | || (MINI_WINDOW_P (w) && XFASTINT (w->hscroll)) | |
3503 | /* Give up if overwriting in the middle of a line. */ | |
177c0ea7 JB |
3504 | || (overwrite_p |
3505 | && PT != ZV | |
5f5c8ee5 GM |
3506 | && FETCH_BYTE (PT) != '\n') |
3507 | /* Give up for tabs and line ends. */ | |
3508 | || g == '\t' | |
3509 | || g == '\n' | |
3510 | || g == '\r' | |
3511 | /* Give up if unable to display the cursor in the window. */ | |
3512 | || w->cursor.vpos < 0 | |
c224f70b GM |
3513 | /* Give up if we are showing a message or just cleared the message |
3514 | because we might need to resize the echo area window. */ | |
3515 | || !NILP (echo_area_buffer[0]) | |
3516 | || !NILP (echo_area_buffer[1]) | |
408f5064 GM |
3517 | || (glyph_row = MATRIX_ROW (w->current_matrix, w->cursor.vpos), |
3518 | /* Can't do it in a continued line because continuation | |
3519 | lines would change. */ | |
3520 | (glyph_row->continued_p | |
60e99293 | 3521 | || glyph_row->exact_window_width_line_p |
408f5064 GM |
3522 | /* Can't use this method if the line overlaps others or is |
3523 | overlapped by others because these other lines would | |
3524 | have to be redisplayed. */ | |
3525 | || glyph_row->overlapping_p | |
3526 | || glyph_row->overlapped_p)) | |
5f5c8ee5 GM |
3527 | /* Can't do it for partial width windows on terminal frames |
3528 | because we can't clear to eol in such a window. */ | |
3529 | || (!window_redisplay_p && !WINDOW_FULL_WIDTH_P (w))) | |
3530 | return 0; | |
3531 | ||
f3ffc2c3 GM |
3532 | /* If we can't insert glyphs, we can use this method only |
3533 | at the end of a line. */ | |
daf01701 | 3534 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
f3ffc2c3 GM |
3535 | if (PT != ZV && FETCH_BYTE (PT_BYTE) != '\n') |
3536 | return 0; | |
3537 | ||
5f5c8ee5 GM |
3538 | /* Set up a display iterator structure for W. Glyphs will be |
3539 | produced in scratch_glyph_row. Current position is W's cursor | |
3540 | position. */ | |
3541 | clear_glyph_row (&scratch_glyph_row); | |
3542 | SET_TEXT_POS (pos, PT, PT_BYTE); | |
5f15d712 | 3543 | DEC_TEXT_POS (pos, !NILP (current_buffer->enable_multibyte_characters)); |
5f5c8ee5 GM |
3544 | init_iterator (&it, w, CHARPOS (pos), BYTEPOS (pos), &scratch_glyph_row, |
3545 | DEFAULT_FACE_ID); | |
3546 | ||
3547 | glyph_row = MATRIX_ROW (w->current_matrix, w->cursor.vpos); | |
e876ff42 GM |
3548 | if (glyph_row->mouse_face_p) |
3549 | return 0; | |
177c0ea7 | 3550 | |
5f5c8ee5 GM |
3551 | /* Give up if highlighting trailing whitespace and we have trailing |
3552 | whitespace in glyph_row. We would have to remove the trailing | |
3553 | whitespace face in that case. */ | |
f1f13490 | 3554 | if (!NILP (Vshow_trailing_whitespace) |
5f5c8ee5 GM |
3555 | && glyph_row->used[TEXT_AREA]) |
3556 | { | |
3557 | struct glyph *last; | |
3558 | ||
3559 | last = glyph_row->glyphs[TEXT_AREA] + glyph_row->used[TEXT_AREA] - 1; | |
3560 | if (last->type == STRETCH_GLYPH | |
3561 | || (last->type == CHAR_GLYPH | |
42186983 | 3562 | && last->u.ch == ' ')) |
5f5c8ee5 GM |
3563 | return 0; |
3564 | } | |
3565 | ||
3566 | /* Give up if there are overlay strings at pos. This would fail | |
3567 | if the overlay string has newlines in it. */ | |
3568 | if (STRINGP (it.string)) | |
3569 | return 0; | |
177c0ea7 | 3570 | |
5f5c8ee5 GM |
3571 | it.hpos = w->cursor.hpos; |
3572 | it.vpos = w->cursor.vpos; | |
3573 | it.current_x = w->cursor.x + it.first_visible_x; | |
3574 | it.current_y = w->cursor.y; | |
3575 | it.end_charpos = PT; | |
3576 | it.stop_charpos = min (PT, it.stop_charpos); | |
ae76d741 | 3577 | it.stop_charpos = max (IT_CHARPOS (it), it.stop_charpos); |
5f5c8ee5 GM |
3578 | |
3579 | /* More than one display element may be returned for PT - 1 if | |
3580 | (i) it's a control character which is translated into `\003' or | |
177c0ea7 | 3581 | `^C', or (ii) it has a display table entry, or (iii) it's a |
5f5c8ee5 GM |
3582 | combination of both. */ |
3583 | delta = delta_bytes = 0; | |
3584 | while (get_next_display_element (&it)) | |
3585 | { | |
3586 | PRODUCE_GLYPHS (&it); | |
3587 | ||
3588 | /* Give up if glyph doesn't fit completely on the line. */ | |
3589 | if (it.current_x >= it.last_visible_x) | |
3590 | return 0; | |
3591 | ||
3592 | /* Give up if new glyph has different ascent or descent than | |
3593 | the original row, or if it is not a character glyph. */ | |
3594 | if (glyph_row->ascent != it.ascent | |
3595 | || glyph_row->height != it.ascent + it.descent | |
408f5064 GM |
3596 | || glyph_row->phys_ascent != it.phys_ascent |
3597 | || glyph_row->phys_height != it.phys_ascent + it.phys_descent | |
5f5c8ee5 GM |
3598 | || it.what != IT_CHARACTER) |
3599 | return 0; | |
3600 | ||
3601 | delta += 1; | |
3602 | delta_bytes += it.len; | |
a2e2a7f6 | 3603 | set_iterator_to_next (&it, 1); |
5f5c8ee5 GM |
3604 | } |
3605 | ||
3606 | /* Give up if we hit the right edge of the window. We would have | |
3607 | to insert truncation or continuation glyphs. */ | |
3608 | added_width = it.current_x - (w->cursor.x + it.first_visible_x); | |
3609 | if (glyph_row->pixel_width + added_width >= it.last_visible_x) | |
3610 | return 0; | |
3611 | ||
3612 | /* Give up if there is a \t following in the line. */ | |
3613 | it2 = it; | |
3614 | it2.end_charpos = ZV; | |
3615 | it2.stop_charpos = min (it2.stop_charpos, ZV); | |
3616 | while (get_next_display_element (&it2) | |
3617 | && !ITERATOR_AT_END_OF_LINE_P (&it2)) | |
3618 | { | |
3619 | if (it2.c == '\t') | |
3620 | return 0; | |
a2e2a7f6 | 3621 | set_iterator_to_next (&it2, 1); |
5f5c8ee5 GM |
3622 | } |
3623 | ||
3624 | /* Number of new glyphs produced. */ | |
3625 | n = it.glyph_row->used[TEXT_AREA]; | |
3626 | ||
3627 | /* Start and end of glyphs in original row. */ | |
3628 | glyphs = glyph_row->glyphs[TEXT_AREA] + w->cursor.hpos; | |
3629 | end = glyph_row->glyphs[1 + TEXT_AREA]; | |
60a8948a | 3630 | |
5f5c8ee5 GM |
3631 | /* Make room for new glyphs, then insert them. */ |
3632 | xassert (end - glyphs - n >= 0); | |
700fb05a GM |
3633 | safe_bcopy ((char *) glyphs, (char *) (glyphs + n), |
3634 | (end - glyphs - n) * sizeof (*end)); | |
5f5c8ee5 GM |
3635 | bcopy (it.glyph_row->glyphs[TEXT_AREA], glyphs, n * sizeof *glyphs); |
3636 | glyph_row->used[TEXT_AREA] = min (glyph_row->used[TEXT_AREA] + n, | |
3637 | end - glyph_row->glyphs[TEXT_AREA]); | |
177c0ea7 | 3638 | |
5f5c8ee5 GM |
3639 | /* Compute new line width. */ |
3640 | glyph = glyph_row->glyphs[TEXT_AREA]; | |
3641 | end = glyph + glyph_row->used[TEXT_AREA]; | |
3642 | glyph_row->pixel_width = glyph_row->x; | |
3643 | while (glyph < end) | |
3644 | { | |
3645 | glyph_row->pixel_width += glyph->pixel_width; | |
3646 | ++glyph; | |
3647 | } | |
3648 | ||
177c0ea7 | 3649 | /* Increment buffer positions for glyphs following the newly |
5f5c8ee5 GM |
3650 | inserted ones. */ |
3651 | for (glyph = glyphs + n; glyph < end; ++glyph) | |
f2fa858f | 3652 | if (glyph->charpos > 0 && BUFFERP (glyph->object)) |
5f5c8ee5 | 3653 | glyph->charpos += delta; |
177c0ea7 | 3654 | |
5f5c8ee5 GM |
3655 | if (MATRIX_ROW_END_CHARPOS (glyph_row) > 0) |
3656 | { | |
3657 | MATRIX_ROW_END_CHARPOS (glyph_row) += delta; | |
3658 | MATRIX_ROW_END_BYTEPOS (glyph_row) += delta_bytes; | |
3659 | } | |
177c0ea7 | 3660 | |
5f5c8ee5 | 3661 | /* Adjust positions in lines following the one we are in. */ |
86c11ba1 GM |
3662 | increment_matrix_positions (w->current_matrix, |
3663 | w->cursor.vpos + 1, | |
3664 | w->current_matrix->nrows, | |
3665 | delta, delta_bytes); | |
5f5c8ee5 GM |
3666 | |
3667 | glyph_row->contains_overlapping_glyphs_p | |
3668 | |= it.glyph_row->contains_overlapping_glyphs_p; | |
3669 | ||
975c6226 GM |
3670 | glyph_row->displays_text_p = 1; |
3671 | w->window_end_vpos = make_number (max (w->cursor.vpos, | |
3672 | XFASTINT (w->window_end_vpos))); | |
3673 | ||
f1f13490 | 3674 | if (!NILP (Vshow_trailing_whitespace)) |
5f5c8ee5 GM |
3675 | highlight_trailing_whitespace (it.f, glyph_row); |
3676 | ||
3677 | /* Write glyphs. If at end of row, we can simply call write_glyphs. | |
3678 | In the middle, we have to insert glyphs. Note that this is now | |
3679 | implemented for X frames. The implementation uses updated_window | |
3680 | and updated_row. */ | |
3681 | updated_row = glyph_row; | |
9d126815 | 3682 | updated_area = TEXT_AREA; |
5f5c8ee5 | 3683 | update_begin (f); |
fa971ac3 | 3684 | if (FRAME_RIF (f)) |
5f5c8ee5 | 3685 | { |
fa971ac3 | 3686 | FRAME_RIF (f)->update_window_begin_hook (w); |
177c0ea7 | 3687 | |
7728f17b GM |
3688 | if (glyphs == end - n |
3689 | /* In front of a space added by append_space. */ | |
3690 | || (glyphs == end - n - 1 | |
3691 | && (end - n)->charpos <= 0)) | |
fa971ac3 | 3692 | FRAME_RIF (f)->write_glyphs (glyphs, n); |
5f5c8ee5 | 3693 | else |
fa971ac3 | 3694 | FRAME_RIF (f)->insert_glyphs (glyphs, n); |
5f5c8ee5 GM |
3695 | } |
3696 | else | |
3697 | { | |
3698 | if (glyphs == end - n) | |
385ed61f | 3699 | write_glyphs (f, glyphs, n); |
5f5c8ee5 | 3700 | else |
385ed61f | 3701 | insert_glyphs (f, glyphs, n); |
5f5c8ee5 | 3702 | } |
4588ec20 | 3703 | |
5f5c8ee5 GM |
3704 | w->cursor.hpos += n; |
3705 | w->cursor.x = it.current_x - it.first_visible_x; | |
3706 | xassert (w->cursor.hpos >= 0 | |
3707 | && w->cursor.hpos < w->desired_matrix->matrix_w); | |
3708 | ||
3709 | /* How to set the cursor differs depending on whether we are | |
3710 | using a frame matrix or a window matrix. Note that when | |
3711 | a frame matrix is used, cursor_to expects frame coordinates, | |
3712 | and the X and Y parameters are not used. */ | |
3713 | if (window_redisplay_p) | |
fa971ac3 KL |
3714 | FRAME_RIF (f)->cursor_to (w->cursor.vpos, w->cursor.hpos, |
3715 | w->cursor.y, w->cursor.x); | |
5f5c8ee5 GM |
3716 | else |
3717 | { | |
3718 | int x, y; | |
3719 | x = (WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos) | |
7df02016 KS |
3720 | + (INTEGERP (w->left_margin_cols) |
3721 | ? XFASTINT (w->left_margin_cols) | |
5f5c8ee5 GM |
3722 | : 0)); |
3723 | y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
385ed61f | 3724 | cursor_to (f, y, x); |
5f5c8ee5 | 3725 | } |
4588ec20 | 3726 | |
7af0e8d7 | 3727 | #ifdef HAVE_WINDOW_SYSTEM |
60e99293 | 3728 | update_window_fringes (w, 0); |
7af0e8d7 | 3729 | #endif |
60e99293 | 3730 | |
fa971ac3 KL |
3731 | if (FRAME_RIF (f)) |
3732 | FRAME_RIF (f)->update_window_end_hook (w, 1, 0); | |
5f5c8ee5 GM |
3733 | update_end (f); |
3734 | updated_row = NULL; | |
daf01701 | 3735 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3736 | fflush (FRAME_TTY (f)->output); |
4588ec20 | 3737 | |
5f5c8ee5 | 3738 | TRACE ((stderr, "direct output for insert\n")); |
fc5206ff | 3739 | mark_window_display_accurate (it.window, 1); |
5f5c8ee5 GM |
3740 | redisplay_performed_directly_p = 1; |
3741 | return 1; | |
3742 | } | |
448fd7c0 | 3743 | |
4588ec20 | 3744 | |
5f5c8ee5 GM |
3745 | /* Perform a direct display update for moving PT by N positions |
3746 | left or right. N < 0 means a movement backwards. This function | |
3747 | is currently only called for N == 1 or N == -1. */ | |
3748 | ||
3749 | int | |
3750 | direct_output_forward_char (n) | |
3751 | int n; | |
3752 | { | |
91fb7e1b | 3753 | struct frame *f = SELECTED_FRAME (); |
5f5c8ee5 GM |
3754 | struct window *w = XWINDOW (selected_window); |
3755 | struct glyph_row *row; | |
3756 | ||
959804a0 | 3757 | /* Give up if point moved out of or into a composition. */ |
7c752c80 | 3758 | if (check_point_in_composition (current_buffer, XINT (w->last_point), |
959804a0 KH |
3759 | current_buffer, PT)) |
3760 | return 0; | |
3761 | ||
5f5c8ee5 GM |
3762 | /* Give up if face attributes have been changed. */ |
3763 | if (face_change_count) | |
3764 | return 0; | |
177c0ea7 JB |
3765 | |
3766 | /* Give up if current matrix is not up to date or we are | |
5f5c8ee5 GM |
3767 | displaying a message. */ |
3768 | if (!display_completed || cursor_in_echo_area) | |
3769 | return 0; | |
3770 | ||
3771 | /* Give up if the buffer's direction is reversed. */ | |
3772 | if (!NILP (XBUFFER (w->buffer)->direction_reversed)) | |
3773 | return 0; | |
3774 | ||
3775 | /* Can't use direct output if highlighting a region. */ | |
3776 | if (!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active)) | |
3777 | return 0; | |
3778 | ||
f1f13490 GM |
3779 | /* Can't use direct output if highlighting trailing whitespace. */ |
3780 | if (!NILP (Vshow_trailing_whitespace)) | |
3781 | return 0; | |
3782 | ||
d2d2ddaf GM |
3783 | /* Give up if we are showing a message or just cleared the message |
3784 | because we might need to resize the echo area window. */ | |
3785 | if (!NILP (echo_area_buffer[0]) || !NILP (echo_area_buffer[1])) | |
3786 | return 0; | |
3787 | ||
e4e0bee9 GM |
3788 | /* Give up if currently displaying a message instead of the |
3789 | minibuffer contents. */ | |
3790 | if (XWINDOW (minibuf_window) == w | |
3791 | && EQ (minibuf_window, echo_area_window)) | |
3792 | return 0; | |
177c0ea7 | 3793 | |
d2d2ddaf GM |
3794 | /* Give up if we don't know where the cursor is. */ |
3795 | if (w->cursor.vpos < 0) | |
3796 | return 0; | |
3797 | ||
5f5c8ee5 GM |
3798 | row = MATRIX_ROW (w->current_matrix, w->cursor.vpos); |
3799 | ||
2a8bd25f | 3800 | /* Give up if PT is outside of the last known cursor row. */ |
9b784ab8 GM |
3801 | if (PT <= MATRIX_ROW_START_CHARPOS (row) |
3802 | || PT >= MATRIX_ROW_END_CHARPOS (row)) | |
5f5c8ee5 GM |
3803 | return 0; |
3804 | ||
3805 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
177c0ea7 | 3806 | |
5f5c8ee5 GM |
3807 | w->last_cursor = w->cursor; |
3808 | XSETFASTINT (w->last_point, PT); | |
3809 | ||
3810 | xassert (w->cursor.hpos >= 0 | |
3811 | && w->cursor.hpos < w->desired_matrix->matrix_w); | |
177c0ea7 | 3812 | |
5f5c8ee5 | 3813 | if (FRAME_WINDOW_P (f)) |
fa971ac3 KL |
3814 | FRAME_RIF (f)->cursor_to (w->cursor.vpos, w->cursor.hpos, |
3815 | w->cursor.y, w->cursor.x); | |
5f5c8ee5 GM |
3816 | else |
3817 | { | |
3818 | int x, y; | |
3819 | x = (WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos) | |
7df02016 KS |
3820 | + (INTEGERP (w->left_margin_cols) |
3821 | ? XFASTINT (w->left_margin_cols) | |
5f5c8ee5 GM |
3822 | : 0)); |
3823 | y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
385ed61f | 3824 | cursor_to (f, y, x); |
4588ec20 | 3825 | } |
177c0ea7 | 3826 | |
daf01701 | 3827 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3828 | fflush (FRAME_TTY (f)->output); |
5f5c8ee5 | 3829 | redisplay_performed_directly_p = 1; |
4588ec20 JB |
3830 | return 1; |
3831 | } | |
5f5c8ee5 GM |
3832 | |
3833 | ||
4588ec20 | 3834 | \f |
5f5c8ee5 GM |
3835 | /*********************************************************************** |
3836 | Frame Update | |
3837 | ***********************************************************************/ | |
4588ec20 | 3838 | |
5f5c8ee5 | 3839 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 3840 | |
5f5c8ee5 GM |
3841 | If FORCE_P is non-zero, don't let redisplay be stopped by detecting |
3842 | pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try | |
3843 | scrolling. | |
177c0ea7 | 3844 | |
5f5c8ee5 | 3845 | Value is non-zero if redisplay was stopped due to pending input. */ |
4588ec20 | 3846 | |
5f5c8ee5 GM |
3847 | int |
3848 | update_frame (f, force_p, inhibit_hairy_id_p) | |
3849 | struct frame *f; | |
3850 | int force_p; | |
3851 | int inhibit_hairy_id_p; | |
3852 | { | |
3853 | /* 1 means display has been paused because of pending input. */ | |
3854 | int paused_p; | |
3855 | struct window *root_window = XWINDOW (f->root_window); | |
3856 | ||
a2130dbb KS |
3857 | if (redisplay_dont_pause) |
3858 | force_p = 1; | |
d012c62b | 3859 | #if PERIODIC_PREEMPTION_CHECKING |
a2130dbb KS |
3860 | else if (NILP (Vredisplay_preemption_period)) |
3861 | force_p = 1; | |
3862 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
3863 | { |
3864 | EMACS_TIME tm; | |
3865 | double p = XFLOATINT (Vredisplay_preemption_period); | |
3866 | int sec, usec; | |
3867 | ||
993d4ab6 KS |
3868 | if (detect_input_pending_ignore_squeezables ()) |
3869 | { | |
3870 | paused_p = 1; | |
3871 | goto do_pause; | |
3872 | } | |
3873 | ||
d012c62b KS |
3874 | sec = (int) p; |
3875 | usec = (p - sec) * 1000000; | |
3876 | ||
3877 | EMACS_GET_TIME (tm); | |
3878 | EMACS_SET_SECS_USECS (preemption_period, sec, usec); | |
3879 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
3880 | } | |
3881 | #endif | |
3882 | ||
5f5c8ee5 | 3883 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3884 | { |
5f5c8ee5 GM |
3885 | /* We are working on window matrix basis. All windows whose |
3886 | flag must_be_updated_p is set have to be updated. */ | |
3887 | ||
3888 | /* Record that we are not working on frame matrices. */ | |
3889 | set_frame_matrix_frame (NULL); | |
3890 | ||
3891 | /* Update all windows in the window tree of F, maybe stopping | |
3892 | when pending input is detected. */ | |
3893 | update_begin (f); | |
3894 | ||
3895 | /* Update the menu bar on X frames that don't have toolkit | |
3896 | support. */ | |
3897 | if (WINDOWP (f->menu_bar_window)) | |
3898 | update_window (XWINDOW (f->menu_bar_window), 1); | |
3899 | ||
3900 | /* Update the tool-bar window, if present. */ | |
9ea173e8 | 3901 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3902 | { |
9ea173e8 | 3903 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3904 | |
3905 | /* Update tool-bar window. */ | |
3906 | if (w->must_be_updated_p) | |
4588ec20 | 3907 | { |
153a073c PJ |
3908 | Lisp_Object tem; |
3909 | ||
5f5c8ee5 GM |
3910 | update_window (w, 1); |
3911 | w->must_be_updated_p = 0; | |
3912 | ||
3913 | /* Swap tool-bar strings. We swap because we want to | |
3914 | reuse strings. */ | |
9ea173e8 GM |
3915 | tem = f->current_tool_bar_string; |
3916 | f->current_tool_bar_string = f->desired_tool_bar_string; | |
3917 | f->desired_tool_bar_string = tem; | |
4588ec20 JB |
3918 | } |
3919 | } | |
177c0ea7 | 3920 | |
5f5c8ee5 GM |
3921 | |
3922 | /* Update windows. */ | |
3923 | paused_p = update_window_tree (root_window, force_p); | |
3924 | update_end (f); | |
177c0ea7 | 3925 | |
5cbd733a | 3926 | /* This flush is a performance bottleneck under X, |
e581a466 | 3927 | and it doesn't seem to be necessary anyway (in general). |
5cbd733a | 3928 | It is necessary when resizing the window with the mouse, or |
e581a466 | 3929 | at least the fringes are not redrawn in a timely manner. ++kfs */ |
5cbd733a | 3930 | if (f->force_flush_display_p) |
e581a466 KL |
3931 | { |
3932 | FRAME_RIF (f)->flush_display (f); | |
3933 | f->force_flush_display_p = 0; | |
3934 | } | |
4588ec20 | 3935 | } |
5f5c8ee5 GM |
3936 | else |
3937 | { | |
3938 | /* We are working on frame matrix basis. Set the frame on whose | |
3939 | frame matrix we operate. */ | |
3940 | set_frame_matrix_frame (f); | |
3941 | ||
868dd24b | 3942 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3943 | build_frame_matrix (f); |
177c0ea7 | 3944 | |
868dd24b GM |
3945 | /* Update the display */ |
3946 | update_begin (f); | |
5f5c8ee5 | 3947 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3948 | update_end (f); |
3949 | ||
3224dac1 KL |
3950 | if (FRAME_TERMCAP_P (f)) |
3951 | { | |
0b0d3e0b KL |
3952 | if (FRAME_TTY (f)->termscript) |
3953 | fflush (FRAME_TTY (f)->termscript); | |
3954 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3955 | } |
868dd24b | 3956 | |
5f5c8ee5 | 3957 | /* Check window matrices for lost pointers. */ |
2d5912c1 | 3958 | #if GLYPH_DEBUG |
9b0e97aa GM |
3959 | check_window_matrix_pointers (root_window); |
3960 | add_frame_display_history (f, paused_p); | |
3961 | #endif | |
5f5c8ee5 GM |
3962 | } |
3963 | ||
993d4ab6 | 3964 | do_pause: |
5f5c8ee5 GM |
3965 | /* Reset flags indicating that a window should be updated. */ |
3966 | set_window_update_flags (root_window, 0); | |
177c0ea7 | 3967 | |
868dd24b | 3968 | display_completed = !paused_p; |
5f5c8ee5 | 3969 | return paused_p; |
4588ec20 | 3970 | } |
5f5c8ee5 GM |
3971 | |
3972 | ||
4588ec20 | 3973 | \f |
5f5c8ee5 GM |
3974 | /************************************************************************ |
3975 | Window-based updates | |
3976 | ************************************************************************/ | |
3977 | ||
3978 | /* Perform updates in window tree rooted at W. FORCE_P non-zero means | |
3979 | don't stop updating when input is pending. */ | |
3980 | ||
3981 | static int | |
3982 | update_window_tree (w, force_p) | |
3983 | struct window *w; | |
3984 | int force_p; | |
3985 | { | |
3986 | int paused_p = 0; | |
177c0ea7 | 3987 | |
5f5c8ee5 GM |
3988 | while (w && !paused_p) |
3989 | { | |
3990 | if (!NILP (w->hchild)) | |
3991 | paused_p |= update_window_tree (XWINDOW (w->hchild), force_p); | |
3992 | else if (!NILP (w->vchild)) | |
3993 | paused_p |= update_window_tree (XWINDOW (w->vchild), force_p); | |
3994 | else if (w->must_be_updated_p) | |
3995 | paused_p |= update_window (w, force_p); | |
3996 | ||
3997 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3998 | } | |
3999 | ||
4000 | return paused_p; | |
4001 | } | |
4002 | ||
4003 | ||
4004 | /* Update window W if its flag must_be_updated_p is non-zero. If | |
4005 | FORCE_P is non-zero, don't stop updating if input is pending. */ | |
4006 | ||
4007 | void | |
4008 | update_single_window (w, force_p) | |
4009 | struct window *w; | |
4010 | int force_p; | |
4011 | { | |
4012 | if (w->must_be_updated_p) | |
4013 | { | |
4014 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
4015 | ||
4016 | /* Record that this is not a frame-based redisplay. */ | |
4017 | set_frame_matrix_frame (NULL); | |
4018 | ||
a2130dbb KS |
4019 | if (redisplay_dont_pause) |
4020 | force_p = 1; | |
d012c62b | 4021 | #if PERIODIC_PREEMPTION_CHECKING |
a2130dbb KS |
4022 | else if (NILP (Vredisplay_preemption_period)) |
4023 | force_p = 1; | |
4024 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
4025 | { |
4026 | EMACS_TIME tm; | |
4027 | double p = XFLOATINT (Vredisplay_preemption_period); | |
4028 | int sec, usec; | |
4029 | ||
4030 | sec = (int) p; | |
4031 | usec = (p - sec) * 1000000; | |
4032 | ||
4033 | EMACS_GET_TIME (tm); | |
4034 | EMACS_SET_SECS_USECS (preemption_period, sec, usec); | |
4035 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
4036 | } | |
4037 | #endif | |
4038 | ||
5f5c8ee5 GM |
4039 | /* Update W. */ |
4040 | update_begin (f); | |
4041 | update_window (w, force_p); | |
4042 | update_end (f); | |
4588ec20 | 4043 | |
5f5c8ee5 GM |
4044 | /* Reset flag in W. */ |
4045 | w->must_be_updated_p = 0; | |
4046 | } | |
4047 | } | |
4588ec20 | 4048 | |
93e023fc | 4049 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 4050 | |
408f5064 GM |
4051 | /* Redraw lines from the current matrix of window W that are |
4052 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
4053 | ||
4054 | static void | |
4055 | redraw_overlapped_rows (w, yb) | |
4056 | struct window *w; | |
4057 | int yb; | |
4058 | { | |
d8ee7803 | 4059 | int i; |
fa971ac3 KL |
4060 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
4061 | ||
408f5064 GM |
4062 | /* If rows overlapping others have been changed, the rows being |
4063 | overlapped have to be redrawn. This won't draw lines that have | |
4064 | already been drawn in update_window_line because overlapped_p in | |
4065 | desired rows is 0, so after row assignment overlapped_p in | |
4066 | current rows is 0. */ | |
4067 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
4068 | { | |
e876ff42 | 4069 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
4070 | |
4071 | if (!row->enabled_p) | |
4072 | break; | |
4073 | else if (row->mode_line_p) | |
4074 | continue; | |
177c0ea7 | 4075 | |
408f5064 GM |
4076 | if (row->overlapped_p) |
4077 | { | |
4078 | enum glyph_row_area area; | |
177c0ea7 | 4079 | |
408f5064 GM |
4080 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
4081 | { | |
4082 | updated_row = row; | |
4083 | updated_area = area; | |
fa971ac3 KL |
4084 | FRAME_RIF (f)->cursor_to (i, 0, row->y, |
4085 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 4086 | if (row->used[area]) |
fa971ac3 KL |
4087 | FRAME_RIF (f)->write_glyphs (row->glyphs[area], |
4088 | row->used[area]); | |
4089 | FRAME_RIF (f)->clear_end_of_line (-1); | |
408f5064 | 4090 | } |
177c0ea7 | 4091 | |
408f5064 GM |
4092 | row->overlapped_p = 0; |
4093 | } | |
4094 | ||
e876ff42 | 4095 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
4096 | break; |
4097 | } | |
4098 | } | |
4099 | ||
4100 | ||
4101 | /* Redraw lines from the current matrix of window W that overlap | |
4102 | others. YB is bottom-most y-position in W. */ | |
4103 | ||
4104 | static void | |
4105 | redraw_overlapping_rows (w, yb) | |
4106 | struct window *w; | |
4107 | int yb; | |
4108 | { | |
4109 | int i, bottom_y; | |
4110 | struct glyph_row *row; | |
fa971ac3 KL |
4111 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
4112 | ||
408f5064 GM |
4113 | for (i = 0; i < w->current_matrix->nrows; ++i) |
4114 | { | |
4115 | row = w->current_matrix->rows + i; | |
4116 | ||
4117 | if (!row->enabled_p) | |
4118 | break; | |
4119 | else if (row->mode_line_p) | |
4120 | continue; | |
177c0ea7 | 4121 | |
408f5064 GM |
4122 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
4123 | ||
4124 | if (row->overlapping_p && i > 0 && bottom_y < yb) | |
4125 | { | |
41124e06 YM |
4126 | int overlaps = 0; |
4127 | ||
4128 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) | |
4129 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) | |
4130 | overlaps |= OVERLAPS_PRED; | |
4131 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) | |
4132 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) | |
4133 | overlaps |= OVERLAPS_SUCC; | |
4134 | ||
4135 | if (overlaps) | |
4136 | { | |
4137 | if (row->used[LEFT_MARGIN_AREA]) | |
4138 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
4139 | ||
4140 | if (row->used[TEXT_AREA]) | |
4141 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
4142 | ||
4143 | if (row->used[RIGHT_MARGIN_AREA]) | |
4144 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
4145 | ||
4146 | /* Record in neighbour rows that ROW overwrites part of | |
4147 | their display. */ | |
4148 | if (overlaps & OVERLAPS_PRED) | |
4149 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
4150 | if (overlaps & OVERLAPS_SUCC) | |
4151 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
4152 | } | |
408f5064 GM |
4153 | } |
4154 | ||
4155 | if (bottom_y >= yb) | |
4156 | break; | |
4157 | } | |
4158 | } | |
4159 | ||
93e023fc KS |
4160 | #endif /* HAVE_WINDOW_SYSTEM */ |
4161 | ||
408f5064 | 4162 | |
93962bfa GM |
4163 | #ifdef GLYPH_DEBUG |
4164 | ||
4165 | /* Check that no row in the current matrix of window W is enabled | |
4166 | which is below what's displayed in the window. */ | |
4167 | ||
4168 | void | |
4169 | check_current_matrix_flags (w) | |
4170 | struct window *w; | |
4171 | { | |
4172 | int last_seen_p = 0; | |
4173 | int i, yb = window_text_bottom_y (w); | |
4174 | ||
4175 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
4176 | { | |
4177 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
4178 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
4179 | last_seen_p = 1; | |
4180 | else if (last_seen_p && row->enabled_p) | |
4181 | abort (); | |
4182 | } | |
4183 | } | |
4184 | ||
4185 | #endif /* GLYPH_DEBUG */ | |
4186 | ||
4187 | ||
5f5c8ee5 GM |
4188 | /* Update display of window W. FORCE_P non-zero means that we should |
4189 | not stop when detecting pending input. */ | |
4190 | ||
4191 | static int | |
4192 | update_window (w, force_p) | |
4588ec20 | 4193 | struct window *w; |
5f5c8ee5 | 4194 | int force_p; |
4588ec20 | 4195 | { |
5f5c8ee5 GM |
4196 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4197 | int paused_p; | |
d012c62b | 4198 | #if !PERIODIC_PREEMPTION_CHECKING |
5f5c8ee5 | 4199 | int preempt_count = baud_rate / 2400 + 1; |
d012c62b | 4200 | #endif |
5f5c8ee5 | 4201 | extern int input_pending; |
8fd9a666 | 4202 | extern Lisp_Object do_mouse_tracking; |
597cfb3f | 4203 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
b96fd3e8 | 4204 | #if GLYPH_DEBUG |
5f5c8ee5 | 4205 | /* Check that W's frame doesn't have glyph matrices. */ |
82f4a138 | 4206 | xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 4207 | #endif |
5f5c8ee5 GM |
4208 | |
4209 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb KS |
4210 | #if !PERIODIC_PREEMPTION_CHECKING |
4211 | if (!force_p) | |
a2d5fca0 | 4212 | detect_input_pending_ignore_squeezables (); |
d012c62b | 4213 | #endif |
4588ec20 | 4214 | |
5f5c8ee5 GM |
4215 | /* If forced to complete the update, or if no input is pending, do |
4216 | the update. */ | |
8fd9a666 | 4217 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 4218 | { |
5f5c8ee5 GM |
4219 | struct glyph_row *row, *end; |
4220 | struct glyph_row *mode_line_row; | |
56974e03 | 4221 | struct glyph_row *header_line_row; |
e87b8809 | 4222 | int yb, changed_p = 0, mouse_face_overwritten_p = 0, n_updated; |
5f5c8ee5 GM |
4223 | |
4224 | rif->update_window_begin_hook (w); | |
4225 | yb = window_text_bottom_y (w); | |
4226 | ||
153a073c PJ |
4227 | /* If window has a header line, update it before everything else. |
4228 | Adjust y-positions of other rows by the header line height. */ | |
5f5c8ee5 GM |
4229 | row = desired_matrix->rows; |
4230 | end = row + desired_matrix->nrows - 1; | |
177c0ea7 | 4231 | |
5f5c8ee5 | 4232 | if (row->mode_line_p) |
56974e03 GM |
4233 | { |
4234 | header_line_row = row; | |
4235 | ++row; | |
4236 | } | |
4237 | else | |
4238 | header_line_row = NULL; | |
5f5c8ee5 GM |
4239 | |
4240 | /* Update the mode line, if necessary. */ | |
4241 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
4242 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
4243 | { | |
4244 | mode_line_row->y = yb; | |
4245 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
4246 | desired_matrix), |
4247 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
4248 | } |
4249 | ||
4250 | /* Find first enabled row. Optimizations in redisplay_internal | |
4251 | may lead to an update with only one row enabled. There may | |
4252 | be also completely empty matrices. */ | |
4253 | while (row < end && !row->enabled_p) | |
4254 | ++row; | |
177c0ea7 | 4255 | |
bfdcafe1 | 4256 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 4257 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
4258 | { |
4259 | int rc = scrolling_window (w, header_line_row != NULL); | |
4260 | if (rc < 0) | |
4261 | { | |
4262 | /* All rows were found to be equal. */ | |
4263 | paused_p = 0; | |
4264 | goto set_cursor; | |
4265 | } | |
4266 | else if (rc > 0) | |
ed8226ea KS |
4267 | { |
4268 | /* We've scrolled the display. */ | |
4269 | force_p = 1; | |
4270 | changed_p = 1; | |
4271 | } | |
56974e03 | 4272 | } |
5f5c8ee5 | 4273 | |
5f5c8ee5 | 4274 | /* Update the rest of the lines. */ |
e87b8809 | 4275 | for (n_updated = 0; row < end && (force_p || !input_pending); ++row) |
b7412313 | 4276 | if (row->enabled_p) |
5f5c8ee5 GM |
4277 | { |
4278 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
4279 | int i; | |
177c0ea7 | 4280 | |
153a073c | 4281 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
4282 | detect_input_pending. If it's done too often, |
4283 | scrolling large windows with repeated scroll-up | |
4284 | commands will too quickly pause redisplay. */ | |
d012c62b KS |
4285 | #if PERIODIC_PREEMPTION_CHECKING |
4286 | if (!force_p) | |
4287 | { | |
4288 | EMACS_TIME tm, dif; | |
4289 | EMACS_GET_TIME (tm); | |
4290 | EMACS_SUB_TIME (dif, preemption_next_check, tm); | |
4291 | if (EMACS_TIME_NEG_P (dif)) | |
4292 | { | |
4293 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
4294 | if (detect_input_pending_ignore_squeezables ()) |
4295 | break; | |
d012c62b KS |
4296 | } |
4297 | } | |
4298 | #else | |
e87b8809 | 4299 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 4300 | detect_input_pending_ignore_squeezables (); |
d012c62b | 4301 | #endif |
e876ff42 GM |
4302 | changed_p |= update_window_line (w, vpos, |
4303 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
4304 | |
4305 | /* Mark all rows below the last visible one in the current | |
4306 | matrix as invalid. This is necessary because of | |
4307 | variable line heights. Consider the case of three | |
4308 | successive redisplays, where the first displays 5 | |
4309 | lines, the second 3 lines, and the third 5 lines again. | |
4310 | If the second redisplay wouldn't mark rows in the | |
4311 | current matrix invalid, the third redisplay might be | |
4312 | tempted to optimize redisplay based on lines displayed | |
4313 | in the first redisplay. */ | |
4314 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
4315 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
4316 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
4317 | } | |
4318 | ||
4319 | /* Was display preempted? */ | |
4320 | paused_p = row < end; | |
177c0ea7 | 4321 | |
56974e03 | 4322 | set_cursor: |
177c0ea7 | 4323 | |
52d2d88a KS |
4324 | /* Update the header line after scrolling because a new header |
4325 | line would otherwise overwrite lines at the top of the window | |
4326 | that can be scrolled. */ | |
4327 | if (header_line_row && header_line_row->enabled_p) | |
4328 | { | |
4329 | header_line_row->y = 0; | |
4330 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
52d2d88a KS |
4331 | } |
4332 | ||
153a073c | 4333 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
4334 | if (!paused_p && !w->pseudo_window_p) |
4335 | { | |
93e023fc | 4336 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
4337 | if (changed_p && rif->fix_overlapping_area) |
4338 | { | |
4339 | redraw_overlapped_rows (w, yb); | |
4340 | redraw_overlapping_rows (w, yb); | |
4341 | } | |
93e023fc | 4342 | #endif |
177c0ea7 | 4343 | |
5f5c8ee5 GM |
4344 | /* Make cursor visible at cursor position of W. */ |
4345 | set_window_cursor_after_update (w); | |
4346 | ||
e876ff42 GM |
4347 | #if 0 /* Check that current matrix invariants are satisfied. This is |
4348 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
4349 | IF_DEBUG (check_matrix_invariants (w)); |
4350 | #endif | |
4588ec20 | 4351 | } |
5f5c8ee5 GM |
4352 | |
4353 | #if GLYPH_DEBUG | |
4354 | /* Remember the redisplay method used to display the matrix. */ | |
4355 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
4356 | #endif | |
408f5064 | 4357 | |
7af0e8d7 | 4358 | #ifdef HAVE_WINDOW_SYSTEM |
60e99293 | 4359 | update_window_fringes (w, 0); |
7af0e8d7 | 4360 | #endif |
60e99293 | 4361 | |
56974e03 GM |
4362 | /* End the update of window W. Don't set the cursor if we |
4363 | paused updating the display because in this case, | |
4364 | set_window_cursor_after_update hasn't been called, and | |
4365 | output_cursor doesn't contain the cursor location. */ | |
4366 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); | |
4588ec20 | 4367 | } |
5f5c8ee5 GM |
4368 | else |
4369 | paused_p = 1; | |
4370 | ||
2d5912c1 | 4371 | #if GLYPH_DEBUG |
0cffd9d8 | 4372 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
4373 | add_window_display_history (w, w->current_matrix->method, paused_p); |
4374 | #endif | |
177c0ea7 | 4375 | |
5f5c8ee5 | 4376 | clear_glyph_matrix (desired_matrix); |
408f5064 | 4377 | |
5f5c8ee5 | 4378 | return paused_p; |
4588ec20 JB |
4379 | } |
4380 | ||
b64b3980 | 4381 | |
5f5c8ee5 GM |
4382 | /* Update the display of area AREA in window W, row number VPOS. |
4383 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
4384 | ||
4385 | static void | |
4386 | update_marginal_area (w, area, vpos) | |
b64b3980 | 4387 | struct window *w; |
5f5c8ee5 | 4388 | int area, vpos; |
b64b3980 | 4389 | { |
5f5c8ee5 | 4390 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 4391 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4392 | |
4393 | /* Let functions in xterm.c know what area subsequent X positions | |
4394 | will be relative to. */ | |
4395 | updated_area = area; | |
4396 | ||
4397 | /* Set cursor to start of glyphs, write them, and clear to the end | |
4398 | of the area. I don't think that something more sophisticated is | |
4399 | necessary here, since marginal areas will not be the default. */ | |
4400 | rif->cursor_to (vpos, 0, desired_row->y, 0); | |
4401 | if (desired_row->used[area]) | |
4402 | rif->write_glyphs (desired_row->glyphs[area], desired_row->used[area]); | |
4403 | rif->clear_end_of_line (-1); | |
b64b3980 | 4404 | } |
23b0200c | 4405 | |
352f1545 | 4406 | |
408f5064 GM |
4407 | /* Update the display of the text area of row VPOS in window W. |
4408 | Value is non-zero if display has changed. */ | |
5f5c8ee5 | 4409 | |
408f5064 | 4410 | static int |
5f5c8ee5 | 4411 | update_text_area (w, vpos) |
23b0200c | 4412 | struct window *w; |
5f5c8ee5 | 4413 | int vpos; |
23b0200c | 4414 | { |
5f5c8ee5 GM |
4415 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
4416 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 4417 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 4418 | int changed_p = 0; |
5f5c8ee5 GM |
4419 | |
4420 | /* Let functions in xterm.c know what area subsequent X positions | |
4421 | will be relative to. */ | |
4422 | updated_area = TEXT_AREA; | |
177c0ea7 | 4423 | |
5f5c8ee5 GM |
4424 | /* If rows are at different X or Y, or rows have different height, |
4425 | or the current row is marked invalid, write the entire line. */ | |
4426 | if (!current_row->enabled_p | |
4427 | || desired_row->y != current_row->y | |
4428 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
4429 | || desired_row->phys_ascent != current_row->phys_ascent |
4430 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 4431 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 4432 | || current_row->overlapped_p |
fee8b690 CY |
4433 | /* This next line is necessary for correctly redrawing |
4434 | mouse-face areas after scrolling and other operations. | |
4435 | However, it causes excessive flickering when mouse is moved | |
4436 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
4437 | line doesn't seem to hurt anything. -- cyd. |
4438 | But it is still needed for the header line. -- kfs. */ | |
4439 | || (current_row->mouse_face_p | |
4440 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
4441 | || current_row->x != desired_row->x) |
4442 | { | |
4443 | rif->cursor_to (vpos, 0, desired_row->y, desired_row->x); | |
177c0ea7 | 4444 | |
5f5c8ee5 GM |
4445 | if (desired_row->used[TEXT_AREA]) |
4446 | rif->write_glyphs (desired_row->glyphs[TEXT_AREA], | |
4447 | desired_row->used[TEXT_AREA]); | |
177c0ea7 | 4448 | |
5f5c8ee5 GM |
4449 | /* Clear to end of window. */ |
4450 | rif->clear_end_of_line (-1); | |
408f5064 | 4451 | changed_p = 1; |
60f2f3f1 GM |
4452 | |
4453 | /* This erases the cursor. We do this here because | |
4454 | notice_overwritten_cursor cannot easily check this, which | |
4455 | might indicate that the whole functionality of | |
4456 | notice_overwritten_cursor would better be implemented here. | |
4457 | On the other hand, we need notice_overwritten_cursor as long | |
4458 | as mouse highlighting is done asynchronously outside of | |
4459 | redisplay. */ | |
4460 | if (vpos == w->phys_cursor.vpos) | |
4461 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
4462 | } |
4463 | else | |
4464 | { | |
4465 | int stop, i, x; | |
4466 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
4467 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
e47306e6 | 4468 | int overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 4469 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
5f5c8ee5 | 4470 | |
78897758 YM |
4471 | /* If the desired row extends its face to the text area end, and |
4472 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
4473 | make sure we write at least one glyph, so that the face |
4474 | extension actually takes place. */ | |
78897758 YM |
4475 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
4476 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
4477 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
4478 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 4479 | --desired_stop_pos; |
177c0ea7 | 4480 | |
5f5c8ee5 GM |
4481 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
4482 | i = 0; | |
4483 | x = desired_row->x; | |
8399f8a0 GM |
4484 | |
4485 | /* Loop over glyphs that current and desired row may have | |
4486 | in common. */ | |
5f5c8ee5 | 4487 | while (i < stop) |
352f1545 | 4488 | { |
6d950f4c | 4489 | int can_skip_p = 1; |
177c0ea7 | 4490 | |
5f5c8ee5 | 4491 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
4492 | don't have to be written. We can't skip if the last |
4493 | current glyph overlaps the glyph to its right. For | |
4494 | example, consider a current row of `if ' with the `f' in | |
4495 | Courier bold so that it overlaps the ` ' to its right. | |
4496 | If the desired row is ` ', we would skip over the space | |
4497 | after the `if' and there would remain a pixel from the | |
4498 | `f' on the screen. */ | |
4499 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 4500 | { |
e47306e6 GM |
4501 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
4502 | int left, right; | |
177c0ea7 | 4503 | |
e47306e6 GM |
4504 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
4505 | &left, &right); | |
6d950f4c | 4506 | can_skip_p = right == 0; |
352f1545 | 4507 | } |
177c0ea7 | 4508 | |
6d950f4c | 4509 | if (can_skip_p) |
352f1545 | 4510 | { |
6d950f4c GM |
4511 | while (i < stop |
4512 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
4513 | { | |
4514 | x += desired_glyph->pixel_width; | |
4515 | ++desired_glyph, ++current_glyph, ++i; | |
4516 | } | |
4517 | ||
4518 | /* Consider the case that the current row contains "xxx | |
4519 | ppp ggg" in italic Courier font, and the desired row | |
4520 | is "xxx ggg". The character `p' has lbearing, `g' | |
4521 | has not. The loop above will stop in front of the | |
4522 | first `p' in the current row. If we would start | |
4523 | writing glyphs there, we wouldn't erase the lbearing | |
4524 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 4525 | taken care of by draw_glyphs. */ |
6d950f4c GM |
4526 | if (overlapping_glyphs_p |
4527 | && i > 0 | |
4528 | && i < current_row->used[TEXT_AREA] | |
4529 | && (current_row->used[TEXT_AREA] | |
4530 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 4531 | { |
6d950f4c | 4532 | int left, right; |
177c0ea7 | 4533 | |
6d950f4c GM |
4534 | rif->get_glyph_overhangs (current_glyph, XFRAME (w->frame), |
4535 | &left, &right); | |
4536 | while (left > 0 && i > 0) | |
4537 | { | |
4538 | --i, --desired_glyph, --current_glyph; | |
4539 | x -= desired_glyph->pixel_width; | |
4540 | left -= desired_glyph->pixel_width; | |
4541 | } | |
5f5c8ee5 | 4542 | } |
352f1545 | 4543 | } |
177c0ea7 | 4544 | |
5f5c8ee5 GM |
4545 | /* Try to avoid writing the entire rest of the desired row |
4546 | by looking for a resync point. This mainly prevents | |
4547 | mode line flickering in the case the mode line is in | |
4548 | fixed-pitch font, which it usually will be. */ | |
4549 | if (i < desired_row->used[TEXT_AREA]) | |
4550 | { | |
4551 | int start_x = x, start_hpos = i; | |
4552 | struct glyph *start = desired_glyph; | |
4553 | int current_x = x; | |
6d950f4c GM |
4554 | int skip_first_p = !can_skip_p; |
4555 | ||
5f5c8ee5 GM |
4556 | /* Find the next glyph that's equal again. */ |
4557 | while (i < stop | |
6d950f4c GM |
4558 | && (skip_first_p |
4559 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
4560 | && x == current_x) |
4561 | { | |
4562 | x += desired_glyph->pixel_width; | |
4563 | current_x += current_glyph->pixel_width; | |
4564 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 4565 | skip_first_p = 0; |
5f5c8ee5 | 4566 | } |
23b0200c | 4567 | |
5f5c8ee5 GM |
4568 | if (i == start_hpos || x != current_x) |
4569 | { | |
4570 | i = start_hpos; | |
4571 | x = start_x; | |
4572 | desired_glyph = start; | |
4573 | break; | |
4574 | } | |
e47306e6 | 4575 | |
5f5c8ee5 GM |
4576 | rif->cursor_to (vpos, start_hpos, desired_row->y, start_x); |
4577 | rif->write_glyphs (start, i - start_hpos); | |
408f5064 | 4578 | changed_p = 1; |
5f5c8ee5 GM |
4579 | } |
4580 | } | |
177c0ea7 | 4581 | |
5f5c8ee5 GM |
4582 | /* Write the rest. */ |
4583 | if (i < desired_row->used[TEXT_AREA]) | |
4584 | { | |
4585 | rif->cursor_to (vpos, i, desired_row->y, x); | |
4586 | rif->write_glyphs (desired_glyph, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 4587 | changed_p = 1; |
5f5c8ee5 | 4588 | } |
177c0ea7 | 4589 | |
5f5c8ee5 GM |
4590 | /* Maybe clear to end of line. */ |
4591 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
4592 | { | |
4593 | /* If new row extends to the end of the text area, nothing | |
4594 | has to be cleared, if and only if we did a write_glyphs | |
4595 | above. This is made sure by setting desired_stop_pos | |
4596 | appropriately above. */ | |
78897758 YM |
4597 | xassert (i < desired_row->used[TEXT_AREA] |
4598 | || ((desired_row->used[TEXT_AREA] | |
4599 | == current_row->used[TEXT_AREA]) | |
4600 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
4601 | } |
4602 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
4603 | { | |
4604 | /* If old row extends to the end of the text area, clear. */ | |
4605 | if (i >= desired_row->used[TEXT_AREA]) | |
4606 | rif->cursor_to (vpos, i, desired_row->y, | |
23228cfa | 4607 | desired_row->pixel_width); |
5f5c8ee5 | 4608 | rif->clear_end_of_line (-1); |
408f5064 | 4609 | changed_p = 1; |
5f5c8ee5 GM |
4610 | } |
4611 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 4612 | { |
5f5c8ee5 GM |
4613 | /* Otherwise clear to the end of the old row. Everything |
4614 | after that position should be clear already. */ | |
4615 | int x; | |
177c0ea7 | 4616 | |
5f5c8ee5 GM |
4617 | if (i >= desired_row->used[TEXT_AREA]) |
4618 | rif->cursor_to (vpos, i, desired_row->y, | |
23228cfa | 4619 | desired_row->pixel_width); |
5f5c8ee5 GM |
4620 | |
4621 | /* If cursor is displayed at the end of the line, make sure | |
4622 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
4623 | with which to erase the cursor (because this method | |
4624 | doesn't work with lbearing/rbearing), so we must do it | |
4625 | this way. */ | |
4626 | if (vpos == w->phys_cursor.vpos | |
4627 | && w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]) | |
4628 | { | |
4629 | w->phys_cursor_on_p = 0; | |
4630 | x = -1; | |
4631 | } | |
4632 | else | |
23228cfa | 4633 | x = current_row->pixel_width; |
5f5c8ee5 | 4634 | rif->clear_end_of_line (x); |
408f5064 | 4635 | changed_p = 1; |
2e8907d3 | 4636 | } |
23b0200c | 4637 | } |
408f5064 GM |
4638 | |
4639 | return changed_p; | |
23b0200c | 4640 | } |
4588ec20 | 4641 | |
5f5c8ee5 | 4642 | |
408f5064 GM |
4643 | /* Update row VPOS in window W. Value is non-zero if display has been |
4644 | changed. */ | |
5f5c8ee5 | 4645 | |
408f5064 | 4646 | static int |
e876ff42 | 4647 | update_window_line (w, vpos, mouse_face_overwritten_p) |
5f5c8ee5 | 4648 | struct window *w; |
e876ff42 | 4649 | int vpos, *mouse_face_overwritten_p; |
5f5c8ee5 GM |
4650 | { |
4651 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
4652 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 4653 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 4654 | int changed_p = 0; |
5f5c8ee5 | 4655 | |
5f5c8ee5 GM |
4656 | /* Set the row being updated. This is important to let xterm.c |
4657 | know what line height values are in effect. */ | |
4658 | updated_row = desired_row; | |
4659 | ||
177c0ea7 JB |
4660 | /* A row can be completely invisible in case a desired matrix was |
4661 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
4662 | the matrix. Make sure to make such rows current anyway, since |
4663 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
4664 | if (desired_row->mode_line_p |
4665 | || desired_row->visible_height > 0) | |
408f5064 | 4666 | { |
504805ac GM |
4667 | xassert (desired_row->enabled_p); |
4668 | ||
4669 | /* Update display of the left margin area, if there is one. */ | |
4670 | if (!desired_row->full_width_p | |
7df02016 | 4671 | && !NILP (w->left_margin_cols)) |
504805ac GM |
4672 | { |
4673 | changed_p = 1; | |
4674 | update_marginal_area (w, LEFT_MARGIN_AREA, vpos); | |
4675 | } | |
177c0ea7 | 4676 | |
504805ac GM |
4677 | /* Update the display of the text area. */ |
4678 | if (update_text_area (w, vpos)) | |
4679 | { | |
4680 | changed_p = 1; | |
4681 | if (current_row->mouse_face_p) | |
4682 | *mouse_face_overwritten_p = 1; | |
4683 | } | |
177c0ea7 | 4684 | |
504805ac GM |
4685 | /* Update display of the right margin area, if there is one. */ |
4686 | if (!desired_row->full_width_p | |
7df02016 | 4687 | && !NILP (w->right_margin_cols)) |
504805ac GM |
4688 | { |
4689 | changed_p = 1; | |
4690 | update_marginal_area (w, RIGHT_MARGIN_AREA, vpos); | |
4691 | } | |
177c0ea7 | 4692 | |
504805ac GM |
4693 | /* Draw truncation marks etc. */ |
4694 | if (!current_row->enabled_p | |
4695 | || desired_row->y != current_row->y | |
4696 | || desired_row->visible_height != current_row->visible_height | |
60e99293 | 4697 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 4698 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
60e99293 | 4699 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 4700 | || desired_row->mode_line_p != current_row->mode_line_p |
60e99293 | 4701 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
4702 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
4703 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
4704 | rif->after_update_window_line_hook (desired_row); | |
408f5064 | 4705 | } |
177c0ea7 | 4706 | |
5f5c8ee5 GM |
4707 | /* Update current_row from desired_row. */ |
4708 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
4709 | updated_row = NULL; | |
408f5064 | 4710 | return changed_p; |
5f5c8ee5 GM |
4711 | } |
4712 | ||
4713 | ||
4714 | /* Set the cursor after an update of window W. This function may only | |
4715 | be called from update_window. */ | |
4716 | ||
4717 | static void | |
4718 | set_window_cursor_after_update (w) | |
4588ec20 JB |
4719 | struct window *w; |
4720 | { | |
5f5c8ee5 | 4721 | struct frame *f = XFRAME (w->frame); |
fa971ac3 | 4722 | struct redisplay_interface *rif = FRAME_RIF (f); |
5f5c8ee5 GM |
4723 | int cx, cy, vpos, hpos; |
4724 | ||
4725 | /* Not intended for frame matrix updates. */ | |
4726 | xassert (FRAME_WINDOW_P (f)); | |
177c0ea7 | 4727 | |
b96fd3e8 GM |
4728 | if (cursor_in_echo_area |
4729 | && !NILP (echo_area_buffer[0]) | |
4730 | /* If we are showing a message instead of the mini-buffer, | |
4731 | show the cursor for the message instead. */ | |
4732 | && XWINDOW (minibuf_window) == w | |
4733 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
4734 | /* These cases apply only to the frame that contains |
4735 | the active mini-buffer window. */ | |
4736 | && FRAME_HAS_MINIBUF_P (f) | |
4737 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
4738 | { | |
4739 | cx = cy = vpos = hpos = 0; | |
4740 | ||
4741 | if (cursor_in_echo_area >= 0) | |
4742 | { | |
4743 | /* If the mini-buffer is several lines high, find the last | |
4744 | line that has any text on it. Note: either all lines | |
4745 | are enabled or none. Otherwise we wouldn't be able to | |
4746 | determine Y. */ | |
862b4790 GM |
4747 | struct glyph_row *row, *last_row; |
4748 | struct glyph *glyph; | |
4749 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 4750 | |
862b4790 | 4751 | last_row = NULL; |
6206f8ce GM |
4752 | row = w->current_matrix->rows; |
4753 | while (row->enabled_p | |
4754 | && (last_row == NULL | |
4755 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 4756 | { |
862b4790 GM |
4757 | if (row->used[TEXT_AREA] |
4758 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
4759 | last_row = row; | |
6206f8ce | 4760 | ++row; |
862b4790 | 4761 | } |
177c0ea7 | 4762 | |
5f5c8ee5 GM |
4763 | if (last_row) |
4764 | { | |
6206f8ce GM |
4765 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
4766 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 4767 | |
b96fd3e8 | 4768 | while (last > start && last->charpos < 0) |
862b4790 | 4769 | --last; |
177c0ea7 | 4770 | |
862b4790 GM |
4771 | for (glyph = start; glyph < last; ++glyph) |
4772 | { | |
4773 | cx += glyph->pixel_width; | |
4774 | ++hpos; | |
4775 | } | |
4776 | ||
5f5c8ee5 | 4777 | cy = last_row->y; |
862b4790 | 4778 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
4779 | } |
4780 | } | |
4781 | } | |
4782 | else | |
4783 | { | |
4784 | cx = w->cursor.x; | |
4785 | cy = w->cursor.y; | |
4786 | hpos = w->cursor.hpos; | |
4787 | vpos = w->cursor.vpos; | |
4788 | } | |
4588ec20 | 4789 | |
5f5c8ee5 GM |
4790 | /* Window cursor can be out of sync for horizontally split windows. */ |
4791 | hpos = max (0, hpos); | |
4792 | hpos = min (w->current_matrix->matrix_w - 1, hpos); | |
4793 | vpos = max (0, vpos); | |
4794 | vpos = min (w->current_matrix->nrows - 1, vpos); | |
4795 | rif->cursor_to (vpos, hpos, cy, cx); | |
4588ec20 | 4796 | } |
4588ec20 | 4797 | |
5f5c8ee5 | 4798 | |
6df5d75f GM |
4799 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window |
4800 | tree rooted at W. */ | |
4801 | ||
4802 | void | |
4803 | set_window_update_flags (w, on_p) | |
4804 | struct window *w; | |
4805 | int on_p; | |
4806 | { | |
4807 | while (w) | |
4808 | { | |
4809 | if (!NILP (w->hchild)) | |
4810 | set_window_update_flags (XWINDOW (w->hchild), on_p); | |
4811 | else if (!NILP (w->vchild)) | |
4812 | set_window_update_flags (XWINDOW (w->vchild), on_p); | |
4813 | else | |
4814 | w->must_be_updated_p = on_p; | |
4815 | ||
4816 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
4817 | } | |
177c0ea7 | 4818 | } |
6df5d75f GM |
4819 | |
4820 | ||
4821 | \f | |
4822 | /*********************************************************************** | |
4823 | Window-Based Scrolling | |
4824 | ***********************************************************************/ | |
4825 | ||
4826 | /* Structure describing rows in scrolling_window. */ | |
4827 | ||
4828 | struct row_entry | |
4829 | { | |
4830 | /* Number of occurrences of this row in desired and current matrix. */ | |
4831 | int old_uses, new_uses; | |
177c0ea7 | 4832 | |
6df5d75f GM |
4833 | /* Vpos of row in new matrix. */ |
4834 | int new_line_number; | |
4835 | ||
4836 | /* Bucket index of this row_entry in the hash table row_table. */ | |
4837 | int bucket; | |
177c0ea7 | 4838 | |
6df5d75f GM |
4839 | /* The row described by this entry. */ |
4840 | struct glyph_row *row; | |
177c0ea7 | 4841 | |
6df5d75f GM |
4842 | /* Hash collision chain. */ |
4843 | struct row_entry *next; | |
4844 | }; | |
4845 | ||
4846 | /* A pool to allocate row_entry structures from, and the size of the | |
4847 | pool. The pool is reallocated in scrolling_window when we find | |
4848 | that we need a larger one. */ | |
4849 | ||
4850 | static struct row_entry *row_entry_pool; | |
4851 | static int row_entry_pool_size; | |
4852 | ||
4853 | /* Index of next free entry in row_entry_pool. */ | |
4854 | ||
4855 | static int row_entry_idx; | |
4856 | ||
4857 | /* The hash table used during scrolling, and the table's size. This | |
4858 | table is used to quickly identify equal rows in the desired and | |
4859 | current matrix. */ | |
4860 | ||
4861 | static struct row_entry **row_table; | |
4862 | static int row_table_size; | |
4863 | ||
4864 | /* Vectors of pointers to row_entry structures belonging to the | |
4865 | current and desired matrix, and the size of the vectors. */ | |
4866 | ||
4867 | static struct row_entry **old_lines, **new_lines; | |
4868 | static int old_lines_size, new_lines_size; | |
4869 | ||
4870 | /* A pool to allocate run structures from, and its size. */ | |
4871 | ||
4872 | static struct run *run_pool; | |
4873 | static int runs_size; | |
4874 | ||
4875 | /* A vector of runs of lines found during scrolling. */ | |
4876 | ||
4877 | static struct run **runs; | |
4878 | ||
6df5d75f GM |
4879 | /* Add glyph row ROW to the scrolling hash table during the scrolling |
4880 | of window W. */ | |
4881 | ||
4882 | static INLINE struct row_entry * | |
4883 | add_row_entry (w, row) | |
4884 | struct window *w; | |
4885 | struct glyph_row *row; | |
4886 | { | |
4887 | struct row_entry *entry; | |
4888 | int i = row->hash % row_table_size; | |
177c0ea7 | 4889 | |
6df5d75f | 4890 | entry = row_table[i]; |
e4e0bee9 | 4891 | while (entry && !row_equal_p (w, entry->row, row, 1)) |
6df5d75f | 4892 | entry = entry->next; |
177c0ea7 | 4893 | |
6df5d75f GM |
4894 | if (entry == NULL) |
4895 | { | |
4896 | entry = row_entry_pool + row_entry_idx++; | |
4897 | entry->row = row; | |
4898 | entry->old_uses = entry->new_uses = 0; | |
4899 | entry->new_line_number = 0; | |
4900 | entry->bucket = i; | |
4901 | entry->next = row_table[i]; | |
4902 | row_table[i] = entry; | |
4903 | } | |
4904 | ||
4905 | return entry; | |
4906 | } | |
4907 | ||
4908 | ||
5f5c8ee5 | 4909 | /* Try to reuse part of the current display of W by scrolling lines. |
153a073c | 4910 | HEADER_LINE_P non-zero means W has a header line. |
5f5c8ee5 GM |
4911 | |
4912 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4913 | Technique for Isolating Differences Between Files." It should take | |
4914 | O(N) time. | |
4915 | ||
4916 | A short outline of the steps of the algorithm | |
4917 | ||
4918 | 1. Skip lines equal at the start and end of both matrices. | |
4919 | ||
4920 | 2. Enter rows in the current and desired matrix into a symbol | |
4921 | table, counting how often they appear in both matrices. | |
4922 | ||
4923 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4924 | i.e. we assume that such lines are likely to have been moved. | |
4925 | ||
4926 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4927 | forward and backward. | |
4928 | ||
4929 | Value is | |
4930 | ||
4931 | -1 if all rows were found to be equal. | |
4932 | 0 to indicate that we did not scroll the display, or | |
4933 | 1 if we did scroll. */ | |
4934 | ||
4935 | static int | |
045dee35 | 4936 | scrolling_window (w, header_line_p) |
5f5c8ee5 | 4937 | struct window *w; |
045dee35 | 4938 | int header_line_p; |
4588ec20 | 4939 | { |
5f5c8ee5 GM |
4940 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4941 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4942 | int yb = window_text_bottom_y (w); | |
6df5d75f GM |
4943 | int i, j, first_old, first_new, last_old, last_new; |
4944 | int nruns, nbytes, n, run_idx; | |
4945 | struct row_entry *entry; | |
fa971ac3 | 4946 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4947 | |
4948 | /* Skip over rows equal at the start. */ | |
bfdcafe1 | 4949 | for (i = header_line_p ? 1 : 0; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4950 | { |
bfdcafe1 GM |
4951 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4952 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4953 | ||
4954 | if (c->enabled_p | |
4955 | && d->enabled_p | |
60e99293 | 4956 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4957 | && c->y == d->y |
4958 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4959 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
4960 | && row_equal_p (w, c, d, 1)) | |
4961 | { | |
4962 | assign_row (c, d); | |
4963 | d->enabled_p = 0; | |
4964 | } | |
4965 | else | |
4966 | break; | |
5f5c8ee5 | 4967 | } |
4588ec20 | 4968 | |
5f5c8ee5 GM |
4969 | /* Give up if some rows in the desired matrix are not enabled. */ |
4970 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4971 | return -1; | |
177c0ea7 | 4972 | |
5f5c8ee5 GM |
4973 | first_old = first_new = i; |
4974 | ||
4975 | /* Set last_new to the index + 1 of the last enabled row in the | |
4976 | desired matrix. */ | |
4977 | i = first_new + 1; | |
4978 | while (i < desired_matrix->nrows - 1 | |
4979 | && MATRIX_ROW (desired_matrix, i)->enabled_p | |
6df5d75f | 4980 | && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)) <= yb) |
5f5c8ee5 GM |
4981 | ++i; |
4982 | ||
4983 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4984 | return 0; | |
4985 | ||
4986 | last_new = i; | |
4987 | ||
4988 | /* Set last_old to the index + 1 of the last enabled row in the | |
4989 | current matrix. We don't look at the enabled flag here because | |
4990 | we plan to reuse part of the display even if other parts are | |
4991 | disabled. */ | |
4992 | i = first_old + 1; | |
93962bfa GM |
4993 | while (i < current_matrix->nrows - 1) |
4994 | { | |
4995 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4996 | if (bottom <= yb) | |
4997 | ++i; | |
4998 | if (bottom >= yb) | |
4999 | break; | |
5000 | } | |
5001 | ||
5f5c8ee5 GM |
5002 | last_old = i; |
5003 | ||
5004 | /* Skip over rows equal at the bottom. */ | |
5005 | i = last_new; | |
5006 | j = last_old; | |
5007 | while (i - 1 > first_new | |
5008 | && j - 1 > first_old | |
5009 | && MATRIX_ROW (current_matrix, i - 1)->enabled_p | |
5010 | && (MATRIX_ROW (current_matrix, i - 1)->y | |
5011 | == MATRIX_ROW (desired_matrix, j - 1)->y) | |
60e99293 | 5012 | && !MATRIX_ROW (desired_matrix, j - 1)->redraw_fringe_bitmaps_p |
5f5c8ee5 GM |
5013 | && row_equal_p (w, |
5014 | MATRIX_ROW (desired_matrix, i - 1), | |
e4e0bee9 | 5015 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
5016 | --i, --j; |
5017 | last_new = i; | |
5018 | last_old = j; | |
5019 | ||
5020 | /* Nothing to do if all rows are equal. */ | |
5021 | if (last_new == first_new) | |
5022 | return 0; | |
5023 | ||
6df5d75f | 5024 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 5025 | |
6df5d75f GM |
5026 | if (current_matrix->nrows > old_lines_size) |
5027 | { | |
5028 | old_lines_size = current_matrix->nrows; | |
5029 | nbytes = old_lines_size * sizeof *old_lines; | |
5030 | old_lines = (struct row_entry **) xrealloc (old_lines, nbytes); | |
5031 | } | |
177c0ea7 | 5032 | |
6df5d75f GM |
5033 | if (desired_matrix->nrows > new_lines_size) |
5034 | { | |
5035 | new_lines_size = desired_matrix->nrows; | |
5036 | nbytes = new_lines_size * sizeof *new_lines; | |
5037 | new_lines = (struct row_entry **) xrealloc (new_lines, nbytes); | |
5038 | } | |
5039 | ||
5040 | n = desired_matrix->nrows + current_matrix->nrows; | |
5041 | if (3 * n > row_table_size) | |
5042 | { | |
5043 | row_table_size = next_almost_prime (3 * n); | |
5044 | nbytes = row_table_size * sizeof *row_table; | |
5045 | row_table = (struct row_entry **) xrealloc (row_table, nbytes); | |
5046 | bzero (row_table, nbytes); | |
5047 | } | |
5048 | ||
5049 | if (n > row_entry_pool_size) | |
5050 | { | |
5051 | row_entry_pool_size = n; | |
5052 | nbytes = row_entry_pool_size * sizeof *row_entry_pool; | |
5053 | row_entry_pool = (struct row_entry *) xrealloc (row_entry_pool, nbytes); | |
5054 | } | |
5055 | ||
5056 | if (desired_matrix->nrows > runs_size) | |
5057 | { | |
5058 | runs_size = desired_matrix->nrows; | |
5059 | nbytes = runs_size * sizeof *runs; | |
5060 | runs = (struct run **) xrealloc (runs, nbytes); | |
5061 | nbytes = runs_size * sizeof *run_pool; | |
5062 | run_pool = (struct run *) xrealloc (run_pool, nbytes); | |
5063 | } | |
5064 | ||
5065 | nruns = run_idx = 0; | |
5066 | row_entry_idx = 0; | |
5067 | ||
5068 | /* Add rows from the current and desired matrix to the hash table | |
5069 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 5070 | |
5f5c8ee5 GM |
5071 | for (i = first_old; i < last_old; ++i) |
5072 | { | |
5073 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
5074 | { | |
6df5d75f GM |
5075 | entry = add_row_entry (w, MATRIX_ROW (current_matrix, i)); |
5076 | old_lines[i] = entry; | |
5077 | ++entry->old_uses; | |
5f5c8ee5 GM |
5078 | } |
5079 | else | |
6df5d75f | 5080 | old_lines[i] = NULL; |
5f5c8ee5 GM |
5081 | } |
5082 | ||
5f5c8ee5 GM |
5083 | for (i = first_new; i < last_new; ++i) |
5084 | { | |
5085 | xassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); | |
6df5d75f GM |
5086 | entry = add_row_entry (w, MATRIX_ROW (desired_matrix, i)); |
5087 | ++entry->new_uses; | |
5088 | entry->new_line_number = i; | |
5089 | new_lines[i] = entry; | |
5f5c8ee5 | 5090 | } |
4588ec20 | 5091 | |
5f5c8ee5 GM |
5092 | /* Identify moves based on lines that are unique and equal |
5093 | in both matrices. */ | |
5094 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
5095 | if (old_lines[i] |
5096 | && old_lines[i]->old_uses == 1 | |
5097 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 GM |
5098 | { |
5099 | int j, k; | |
6df5d75f GM |
5100 | int new_line = old_lines[i]->new_line_number; |
5101 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
5102 | |
5103 | /* Record move. */ | |
5104 | run->current_vpos = i; | |
5105 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
5106 | run->desired_vpos = new_line; | |
5107 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
5108 | run->nrows = 1; | |
5109 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
5110 | ||
5111 | /* Extend backward. */ | |
5112 | j = i - 1; | |
5113 | k = new_line - 1; | |
5114 | while (j > first_old | |
5115 | && k > first_new | |
6df5d75f | 5116 | && old_lines[j] == new_lines[k]) |
5f5c8ee5 GM |
5117 | { |
5118 | int h = MATRIX_ROW (current_matrix, j)->height; | |
177c0ea7 JB |
5119 | --run->current_vpos; |
5120 | --run->desired_vpos; | |
5f5c8ee5 GM |
5121 | ++run->nrows; |
5122 | run->height += h; | |
5123 | run->desired_y -= h; | |
5124 | run->current_y -= h; | |
5125 | --j, --k; | |
5126 | } | |
4588ec20 | 5127 | |
5f5c8ee5 GM |
5128 | /* Extend forward. */ |
5129 | j = i + 1; | |
5130 | k = new_line + 1; | |
5131 | while (j < last_old | |
5132 | && k < last_new | |
6df5d75f | 5133 | && old_lines[j] == new_lines[k]) |
5f5c8ee5 GM |
5134 | { |
5135 | int h = MATRIX_ROW (current_matrix, j)->height; | |
177c0ea7 | 5136 | ++run->nrows; |
5f5c8ee5 GM |
5137 | run->height += h; |
5138 | ++j, ++k; | |
5139 | } | |
19dff8dc | 5140 | |
5f5c8ee5 GM |
5141 | /* Insert run into list of all runs. Order runs by copied |
5142 | pixel lines. Note that we record runs that don't have to | |
5143 | be copied because they are already in place. This is done | |
5144 | because we can avoid calling update_window_line in this | |
5145 | case. */ | |
5146 | for (j = 0; j < nruns && runs[j]->height > run->height; ++j) | |
5147 | ; | |
2b4ec4d7 | 5148 | for (k = nruns; k > j; --k) |
5f5c8ee5 GM |
5149 | runs[k] = runs[k - 1]; |
5150 | runs[j] = run; | |
5151 | ++nruns; | |
5152 | ||
5153 | i += run->nrows; | |
5154 | } | |
5155 | else | |
5156 | ++i; | |
4588ec20 | 5157 | |
5f5c8ee5 GM |
5158 | /* Do the moves. Do it in a way that we don't overwrite something |
5159 | we want to copy later on. This is not solvable in general | |
5160 | because there is only one display and we don't have a way to | |
5161 | exchange areas on this display. Example: | |
4588ec20 | 5162 | |
5f5c8ee5 GM |
5163 | +-----------+ +-----------+ |
5164 | | A | | B | | |
5165 | +-----------+ --> +-----------+ | |
5166 | | B | | A | | |
5167 | +-----------+ +-----------+ | |
4588ec20 | 5168 | |
5f5c8ee5 GM |
5169 | Instead, prefer bigger moves, and invalidate moves that would |
5170 | copy from where we copied to. */ | |
ea0d86af | 5171 | |
5f5c8ee5 GM |
5172 | for (i = 0; i < nruns; ++i) |
5173 | if (runs[i]->nrows > 0) | |
5174 | { | |
5175 | struct run *r = runs[i]; | |
24e86043 | 5176 | |
5f5c8ee5 GM |
5177 | /* Copy on the display. */ |
5178 | if (r->current_y != r->desired_y) | |
5179 | { | |
5180 | rif->scroll_run_hook (w, r); | |
5181 | ||
5182 | /* Invalidate runs that copy from where we copied to. */ | |
5183 | for (j = i + 1; j < nruns; ++j) | |
5184 | { | |
5185 | struct run *p = runs[j]; | |
177c0ea7 | 5186 | |
5f5c8ee5 GM |
5187 | if ((p->current_y >= r->desired_y |
5188 | && p->current_y < r->desired_y + r->height) | |
5189 | || (p->current_y + p->height >= r->desired_y | |
5190 | && (p->current_y + p->height | |
5191 | < r->desired_y + r->height))) | |
5192 | p->nrows = 0; | |
5193 | } | |
5194 | } | |
ea0d86af | 5195 | |
5f5c8ee5 GM |
5196 | /* Assign matrix rows. */ |
5197 | for (j = 0; j < r->nrows; ++j) | |
5198 | { | |
5199 | struct glyph_row *from, *to; | |
408f5064 | 5200 | int to_overlapped_p; |
e876ff42 | 5201 | |
5f5c8ee5 GM |
5202 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
5203 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 5204 | to_overlapped_p = to->overlapped_p; |
60e99293 KS |
5205 | if (!from->mode_line_p && !w->pseudo_window_p |
5206 | && (to->left_fringe_bitmap != from->left_fringe_bitmap | |
5cbd733a KS |
5207 | || to->right_fringe_bitmap != from->right_fringe_bitmap |
5208 | || to->left_fringe_face_id != from->left_fringe_face_id | |
5209 | || to->right_fringe_face_id != from->right_fringe_face_id | |
3d4a365f | 5210 | || to->overlay_arrow_bitmap != from->overlay_arrow_bitmap)) |
60e99293 | 5211 | from->redraw_fringe_bitmaps_p = 1; |
5f5c8ee5 GM |
5212 | assign_row (to, from); |
5213 | to->enabled_p = 1, from->enabled_p = 0; | |
408f5064 | 5214 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
5215 | } |
5216 | } | |
15874c59 | 5217 | |
6df5d75f GM |
5218 | /* Clear the hash table, for the next time. */ |
5219 | for (i = 0; i < row_entry_idx; ++i) | |
5220 | row_table[row_entry_pool[i].bucket] = NULL; | |
5221 | ||
ed8226ea KS |
5222 | /* Value is > 0 to indicate that we scrolled the display. */ |
5223 | return nruns; | |
5f5c8ee5 | 5224 | } |
de83c314 | 5225 | |
15874c59 | 5226 | |
4588ec20 | 5227 | \f |
5f5c8ee5 GM |
5228 | /************************************************************************ |
5229 | Frame-Based Updates | |
5230 | ************************************************************************/ | |
4588ec20 | 5231 | |
5f5c8ee5 | 5232 | /* Update the desired frame matrix of frame F. |
4588ec20 | 5233 | |
5f5c8ee5 GM |
5234 | FORCE_P non-zero means that the update should not be stopped by |
5235 | pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling | |
5236 | should not be tried. | |
5237 | ||
5238 | Value is non-zero if update was stopped due to pending input. */ | |
5239 | ||
5240 | static int | |
5241 | update_frame_1 (f, force_p, inhibit_id_p) | |
5242 | struct frame *f; | |
5243 | int force_p; | |
5244 | int inhibit_id_p; | |
4588ec20 | 5245 | { |
5f5c8ee5 GM |
5246 | /* Frame matrices to work on. */ |
5247 | struct glyph_matrix *current_matrix = f->current_matrix; | |
5248 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5249 | int i; | |
4588ec20 JB |
5250 | int pause; |
5251 | int preempt_count = baud_rate / 2400 + 1; | |
dfcf069d | 5252 | extern int input_pending; |
5f5c8ee5 GM |
5253 | |
5254 | xassert (current_matrix && desired_matrix); | |
4588ec20 | 5255 | |
c37e4889 RS |
5256 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
5257 | calculate_costs (f); | |
5258 | ||
d88c2b9e RS |
5259 | if (preempt_count <= 0) |
5260 | preempt_count = 1; | |
5261 | ||
a2130dbb KS |
5262 | #if !PERIODIC_PREEMPTION_CHECKING |
5263 | if (!force_p && detect_input_pending_ignore_squeezables ()) | |
4588ec20 JB |
5264 | { |
5265 | pause = 1; | |
5266 | goto do_pause; | |
5267 | } | |
d012c62b | 5268 | #endif |
4588ec20 | 5269 | |
5f5c8ee5 | 5270 | /* If we cannot insert/delete lines, it's no use trying it. */ |
daf01701 | 5271 | if (!FRAME_LINE_INS_DEL_OK (f)) |
5f5c8ee5 | 5272 | inhibit_id_p = 1; |
7098a0fa | 5273 | |
efb859b4 | 5274 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
5275 | i/d line if just want cursor motion. */ |
5276 | for (i = 0; i < desired_matrix->nrows; i++) | |
5277 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
5278 | break; |
5279 | ||
5280 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
5281 | if (!inhibit_id_p && i < desired_matrix->nrows) |
5282 | force_p |= scrolling (f); | |
4588ec20 JB |
5283 | |
5284 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
5285 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
5286 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 5287 | |
5f5c8ee5 GM |
5288 | /* Now update the rest of the lines. */ |
5289 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 5290 | { |
5f5c8ee5 | 5291 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 5292 | { |
b6a65ac2 | 5293 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
5294 | { |
5295 | /* Flush out every so many lines. | |
5296 | Also flush out if likely to have more than 1k buffered | |
5297 | otherwise. I'm told that some telnet connections get | |
5298 | really screwed by more than 1k output at once. */ | |
0b0d3e0b | 5299 | int outq = PENDING_OUTPUT_COUNT (FRAME_TTY (f)->output); |
4588ec20 JB |
5300 | if (outq > 900 |
5301 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
5302 | { | |
0b0d3e0b | 5303 | fflush (FRAME_TTY (f)->output); |
4588ec20 JB |
5304 | if (preempt_count == 1) |
5305 | { | |
a41f8bed JB |
5306 | #ifdef EMACS_OUTQSIZE |
5307 | if (EMACS_OUTQSIZE (0, &outq) < 0) | |
4588ec20 | 5308 | /* Probably not a tty. Ignore the error and reset |
153a073c | 5309 | the outq count. */ |
0b0d3e0b | 5310 | outq = PENDING_OUTPUT_COUNT (FRAME_TTY (f->output)); |
4588ec20 JB |
5311 | #endif |
5312 | outq *= 10; | |
d520f0d2 | 5313 | if (baud_rate <= outq && baud_rate > 0) |
d88c2b9e | 5314 | sleep (outq / baud_rate); |
4588ec20 JB |
5315 | } |
5316 | } | |
4588ec20 JB |
5317 | } |
5318 | ||
d012c62b KS |
5319 | #if PERIODIC_PREEMPTION_CHECKING |
5320 | if (!force_p) | |
5321 | { | |
5322 | EMACS_TIME tm, dif; | |
5323 | EMACS_GET_TIME (tm); | |
5324 | EMACS_SUB_TIME (dif, preemption_next_check, tm); | |
5325 | if (EMACS_TIME_NEG_P (dif)) | |
5326 | { | |
5327 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
5328 | if (detect_input_pending_ignore_squeezables ()) |
5329 | break; | |
d012c62b KS |
5330 | } |
5331 | } | |
5332 | #else | |
5333 | if (!force_p && (i - 1) % preempt_count == 0) | |
a2d5fca0 | 5334 | detect_input_pending_ignore_squeezables (); |
d012c62b | 5335 | #endif |
a2960116 | 5336 | |
5f5c8ee5 | 5337 | update_frame_line (f, i); |
4588ec20 | 5338 | } |
4588ec20 | 5339 | } |
177c0ea7 | 5340 | |
7df02016 | 5341 | pause = (i < FRAME_LINES (f) - 1) ? i : 0; |
4588ec20 JB |
5342 | |
5343 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
5344 | if (!pause) | |
5345 | { | |
48cf7030 | 5346 | if ((cursor_in_echo_area |
5f5c8ee5 | 5347 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 5348 | show the cursor for the message instead of for the |
5f5c8ee5 | 5349 | (now hidden) mini-buffer contents. */ |
2577053b RS |
5350 | || (EQ (minibuf_window, selected_window) |
5351 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 5352 | && !NILP (echo_area_buffer[0]))) |
2577053b | 5353 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 5354 | the active mini-buffer window. */ |
2577053b | 5355 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 5356 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 5357 | { |
7df02016 | 5358 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
5359 | int row, col; |
5360 | ||
5361 | if (cursor_in_echo_area < 0) | |
5362 | { | |
5f5c8ee5 GM |
5363 | /* Negative value of cursor_in_echo_area means put |
5364 | cursor at beginning of line. */ | |
648fa17d JB |
5365 | row = top; |
5366 | col = 0; | |
5367 | } | |
1113d9db | 5368 | else |
648fa17d | 5369 | { |
5f5c8ee5 GM |
5370 | /* Positive value of cursor_in_echo_area means put |
5371 | cursor at the end of the prompt. If the mini-buffer | |
5372 | is several lines high, find the last line that has | |
5373 | any text on it. */ | |
7df02016 | 5374 | row = FRAME_LINES (f); |
177c0ea7 | 5375 | do |
648fa17d | 5376 | { |
5f5c8ee5 GM |
5377 | --row; |
5378 | col = 0; | |
177c0ea7 | 5379 | |
5f5c8ee5 GM |
5380 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
5381 | { | |
5382 | /* Frame rows are filled up with spaces that | |
5383 | must be ignored here. */ | |
5f5c8ee5 GM |
5384 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
5385 | row); | |
5386 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
5387 | struct glyph *last = start + r->used[TEXT_AREA]; | |
5388 | ||
5389 | while (last > start | |
5390 | && (last - 1)->charpos < 0) | |
5391 | --last; | |
177c0ea7 | 5392 | |
5f5c8ee5 GM |
5393 | col = last - start; |
5394 | } | |
648fa17d JB |
5395 | } |
5396 | while (row > top && col == 0); | |
5397 | ||
6395da5c | 5398 | /* Make sure COL is not out of range. */ |
868e640e | 5399 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 5400 | { |
6395da5c | 5401 | /* If we have another row, advance cursor into it. */ |
7df02016 | 5402 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 5403 | { |
7df02016 | 5404 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
5405 | row++; |
5406 | } | |
5407 | /* Otherwise move it back in range. */ | |
5408 | else | |
868e640e | 5409 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
5410 | } |
5411 | } | |
5412 | ||
385ed61f | 5413 | cursor_to (f, row, col); |
1113d9db | 5414 | } |
4588ec20 | 5415 | else |
5f5c8ee5 GM |
5416 | { |
5417 | /* We have only one cursor on terminal frames. Use it to | |
5418 | display the cursor of the selected window. */ | |
5419 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
5420 | if (w->cursor.vpos >= 0 |
5421 | /* The cursor vpos may be temporarily out of bounds | |
5422 | in the following situation: There is one window, | |
5423 | with the cursor in the lower half of it. The window | |
5424 | is split, and a message causes a redisplay before | |
5425 | a new cursor position has been computed. */ | |
7df02016 | 5426 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
5427 | { |
5428 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
5429 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
5430 | ||
7df02016 KS |
5431 | if (INTEGERP (w->left_margin_cols)) |
5432 | x += XFASTINT (w->left_margin_cols); | |
177c0ea7 | 5433 | |
7df02016 | 5434 | /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */ |
385ed61f | 5435 | cursor_to (f, y, x); |
5f5c8ee5 GM |
5436 | } |
5437 | } | |
4588ec20 JB |
5438 | } |
5439 | ||
4588ec20 JB |
5440 | do_pause: |
5441 | ||
5f5c8ee5 | 5442 | clear_desired_matrices (f); |
4588ec20 JB |
5443 | return pause; |
5444 | } | |
5445 | ||
4588ec20 | 5446 | |
5f5c8ee5 | 5447 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 5448 | |
dfcf069d | 5449 | int |
502b9b64 | 5450 | scrolling (frame) |
5f5c8ee5 | 5451 | struct frame *frame; |
4588ec20 JB |
5452 | { |
5453 | int unchanged_at_top, unchanged_at_bottom; | |
5454 | int window_size; | |
5455 | int changed_lines; | |
7df02016 KS |
5456 | int *old_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); |
5457 | int *new_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
5458 | int *draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
5459 | int *old_draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 5460 | register int i; |
7df02016 | 5461 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
5462 | struct glyph_matrix *current_matrix = frame->current_matrix; |
5463 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 5464 | |
5f5c8ee5 GM |
5465 | if (!current_matrix) |
5466 | abort (); | |
4588ec20 | 5467 | |
5f5c8ee5 GM |
5468 | /* Compute hash codes of all the lines. Also calculate number of |
5469 | changed lines, number of unchanged lines at the beginning, and | |
5470 | number of unchanged lines at the end. */ | |
4588ec20 JB |
5471 | changed_lines = 0; |
5472 | unchanged_at_top = 0; | |
7df02016 KS |
5473 | unchanged_at_bottom = FRAME_LINES (frame); |
5474 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
5475 | { |
5476 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 5477 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 5478 | return 0; |
5f5c8ee5 GM |
5479 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
5480 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
5481 | { |
5482 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
5483 | new_hash[i] = old_hash[i]; | |
5484 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
5485 | draw_cost[i] = INFINITY; | |
5486 | } | |
4588ec20 | 5487 | else |
f188b3c4 | 5488 | { |
5f5c8ee5 GM |
5489 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
5490 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 5491 | } |
4588ec20 JB |
5492 | |
5493 | if (old_hash[i] != new_hash[i]) | |
5494 | { | |
5495 | changed_lines++; | |
7df02016 | 5496 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
5497 | } |
5498 | else if (i == unchanged_at_top) | |
5499 | unchanged_at_top++; | |
5f5c8ee5 | 5500 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
5501 | } |
5502 | ||
5503 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
daf01701 | 5504 | if ((!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 5505 | && changed_lines < baud_rate / 2400) |
7df02016 | 5506 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
5507 | return 1; |
5508 | ||
7df02016 | 5509 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
5510 | - unchanged_at_bottom); |
5511 | ||
daf01701 | 5512 | if (FRAME_SCROLL_REGION_OK (frame)) |
4588ec20 | 5513 | free_at_end_vpos -= unchanged_at_bottom; |
daf01701 | 5514 | else if (FRAME_MEMORY_BELOW_FRAME (frame)) |
4588ec20 JB |
5515 | free_at_end_vpos = -1; |
5516 | ||
5517 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 5518 | current frame and desired frame, don't bother with i/d calc. */ |
daf01701 | 5519 | if (!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 5520 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
5521 | && (window_size >= |
5522 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 5523 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
5524 | old_hash, new_hash, draw_cost))) |
5525 | return 0; | |
5526 | ||
5f5c8ee5 GM |
5527 | if (window_size < 2) |
5528 | return 0; | |
5529 | ||
502b9b64 | 5530 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 5531 | draw_cost + unchanged_at_top - 1, |
190bb91a | 5532 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
5533 | old_hash + unchanged_at_top - 1, |
5534 | new_hash + unchanged_at_top - 1, | |
5535 | free_at_end_vpos - unchanged_at_top); | |
5536 | ||
5537 | return 0; | |
5538 | } | |
4588ec20 | 5539 | |
4588ec20 | 5540 | |
5f5c8ee5 GM |
5541 | /* Count the number of blanks at the start of the vector of glyphs R |
5542 | which is LEN glyphs long. */ | |
4588ec20 | 5543 | |
4588ec20 | 5544 | static int |
5f5c8ee5 GM |
5545 | count_blanks (r, len) |
5546 | struct glyph *r; | |
5547 | int len; | |
4588ec20 | 5548 | { |
5f5c8ee5 | 5549 | int i; |
177c0ea7 | 5550 | |
5f5c8ee5 GM |
5551 | for (i = 0; i < len; ++i) |
5552 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
5553 | break; | |
5554 | ||
5555 | return i; | |
4588ec20 JB |
5556 | } |
5557 | ||
5f5c8ee5 GM |
5558 | |
5559 | /* Count the number of glyphs in common at the start of the glyph | |
5560 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
5561 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
5562 | ||
4588ec20 | 5563 | static int |
5f5c8ee5 GM |
5564 | count_match (str1, end1, str2, end2) |
5565 | struct glyph *str1, *end1, *str2, *end2; | |
4588ec20 | 5566 | { |
5f5c8ee5 GM |
5567 | struct glyph *p1 = str1; |
5568 | struct glyph *p2 = str2; | |
177c0ea7 | 5569 | |
5f5c8ee5 GM |
5570 | while (p1 < end1 |
5571 | && p2 < end2 | |
42186983 | 5572 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 5573 | ++p1, ++p2; |
177c0ea7 | 5574 | |
5f5c8ee5 | 5575 | return p1 - str1; |
4588ec20 JB |
5576 | } |
5577 | ||
5f5c8ee5 | 5578 | |
4588ec20 | 5579 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 5580 | |
5f5c8ee5 | 5581 | extern int *char_ins_del_vector; |
7df02016 | 5582 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))]) |
4588ec20 | 5583 | |
5f5c8ee5 GM |
5584 | |
5585 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
5586 | ||
4588ec20 | 5587 | static void |
c363a1d6 GM |
5588 | update_frame_line (f, vpos) |
5589 | struct frame *f; | |
4588ec20 JB |
5590 | int vpos; |
5591 | { | |
5f5c8ee5 | 5592 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
5593 | int tem; |
5594 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
5595 | struct glyph_matrix *current_matrix = f->current_matrix; |
5596 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
5597 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
5598 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
5599 | int must_write_whole_line_p; | |
daf01701 | 5600 | int write_spaces_p = FRAME_MUST_WRITE_SPACES (f); |
c363a1d6 | 5601 | int colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background |
0a894bad GM |
5602 | != FACE_TTY_DEFAULT_BG_COLOR); |
5603 | ||
5604 | if (colored_spaces_p) | |
5605 | write_spaces_p = 1; | |
5f5c8ee5 | 5606 | |
26c63686 GM |
5607 | /* Current row not enabled means it has unknown contents. We must |
5608 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
5609 | must_write_whole_line_p = !current_row->enabled_p; |
5610 | if (must_write_whole_line_p) | |
4588ec20 | 5611 | { |
5f5c8ee5 | 5612 | obody = 0; |
4588ec20 JB |
5613 | olen = 0; |
5614 | } | |
5615 | else | |
5616 | { | |
5f5c8ee5 GM |
5617 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
5618 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 5619 | |
4cecaab8 MB |
5620 | /* Ignore trailing spaces, if we can. */ |
5621 | if (!write_spaces_p) | |
5622 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
5623 | olen--; | |
4588ec20 JB |
5624 | } |
5625 | ||
5f5c8ee5 GM |
5626 | current_row->enabled_p = 1; |
5627 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 5628 | |
5f5c8ee5 GM |
5629 | /* If desired line is empty, just clear the line. */ |
5630 | if (!desired_row->enabled_p) | |
4588ec20 JB |
5631 | { |
5632 | nlen = 0; | |
5633 | goto just_erase; | |
5634 | } | |
5635 | ||
5f5c8ee5 GM |
5636 | nbody = desired_row->glyphs[TEXT_AREA]; |
5637 | nlen = desired_row->used[TEXT_AREA]; | |
5638 | nend = nbody + nlen; | |
5639 | ||
5640 | /* If display line has unknown contents, write the whole line. */ | |
5641 | if (must_write_whole_line_p) | |
5642 | { | |
26c63686 | 5643 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 5644 | if (!write_spaces_p) |
74ca462f GM |
5645 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
5646 | --nlen; | |
5647 | ||
26c63686 | 5648 | /* Write the contents of the desired line. */ |
74ca462f | 5649 | if (nlen) |
26c63686 | 5650 | { |
385ed61f KL |
5651 | cursor_to (f, vpos, 0); |
5652 | write_glyphs (f, nbody, nlen); | |
26c63686 | 5653 | } |
177c0ea7 | 5654 | |
26c63686 GM |
5655 | /* Don't call clear_end_of_line if we already wrote the whole |
5656 | line. The cursor will not be at the right margin in that | |
5657 | case but in the line below. */ | |
7df02016 | 5658 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 | 5659 | { |
385ed61f KL |
5660 | cursor_to (f, vpos, nlen); |
5661 | clear_end_of_line (f, FRAME_TOTAL_COLS (f)); | |
26c63686 | 5662 | } |
58827478 GM |
5663 | else |
5664 | /* Make sure we are in the right row, otherwise cursor movement | |
5665 | with cmgoto might use `ch' in the wrong row. */ | |
385ed61f | 5666 | cursor_to (f, vpos, 0); |
177c0ea7 | 5667 | |
5f5c8ee5 GM |
5668 | make_current (desired_matrix, current_matrix, vpos); |
5669 | return; | |
5670 | } | |
4588ec20 JB |
5671 | |
5672 | /* Pretend trailing spaces are not there at all, | |
5673 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
5674 | if (!write_spaces_p) |
5675 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
5676 | nlen--; | |
4588ec20 JB |
5677 | |
5678 | /* If there's no i/d char, quickly do the best we can without it. */ | |
daf01701 | 5679 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
4588ec20 | 5680 | { |
5f5c8ee5 | 5681 | int i, j; |
4588ec20 | 5682 | |
5f5c8ee5 GM |
5683 | /* Find the first glyph in desired row that doesn't agree with |
5684 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
5685 | for (i = 0; i < nlen; i++) |
5686 | { | |
5f5c8ee5 | 5687 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 5688 | { |
5f5c8ee5 GM |
5689 | /* Find the end of the run of different glyphs. */ |
5690 | j = i + 1; | |
5691 | while (j < nlen | |
5692 | && (j >= olen | |
5693 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
5694 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
5695 | ++j; | |
177c0ea7 JB |
5696 | |
5697 | /* Output this run of non-matching chars. */ | |
385ed61f KL |
5698 | cursor_to (f, vpos, i); |
5699 | write_glyphs (f, nbody + i, j - i); | |
5f5c8ee5 | 5700 | i = j - 1; |
4588ec20 JB |
5701 | |
5702 | /* Now find the next non-match. */ | |
5703 | } | |
5704 | } | |
5705 | ||
5706 | /* Clear the rest of the line, or the non-clear part of it. */ | |
5707 | if (olen > nlen) | |
5708 | { | |
385ed61f KL |
5709 | cursor_to (f, vpos, nlen); |
5710 | clear_end_of_line (f, olen); | |
4588ec20 JB |
5711 | } |
5712 | ||
5f5c8ee5 GM |
5713 | /* Make current row = desired row. */ |
5714 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
5715 | return; |
5716 | } | |
5717 | ||
5f5c8ee5 GM |
5718 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
5719 | characters in a row. */ | |
5720 | ||
4588ec20 JB |
5721 | if (!olen) |
5722 | { | |
5f5c8ee5 GM |
5723 | /* If current line is blank, skip over initial spaces, if |
5724 | possible, and write the rest. */ | |
4cecaab8 | 5725 | if (write_spaces_p) |
5f5c8ee5 GM |
5726 | nsp = 0; |
5727 | else | |
5728 | nsp = count_blanks (nbody, nlen); | |
5729 | ||
4588ec20 JB |
5730 | if (nlen > nsp) |
5731 | { | |
385ed61f KL |
5732 | cursor_to (f, vpos, nsp); |
5733 | write_glyphs (f, nbody + nsp, nlen - nsp); | |
4588ec20 JB |
5734 | } |
5735 | ||
502b9b64 | 5736 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 5737 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
5738 | return; |
5739 | } | |
5740 | ||
4588ec20 | 5741 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 5742 | osp = count_blanks (obody, olen); |
4cecaab8 | 5743 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 5744 | |
5f5c8ee5 GM |
5745 | /* Compute number of matching chars starting with first non-blank. */ |
5746 | begmatch = count_match (obody + osp, obody + olen, | |
5747 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
5748 | |
5749 | /* Spaces in new match implicit space past the end of old. */ | |
5750 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 5751 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
5752 | { |
5753 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
5754 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
5755 | ++begmatch; | |
4588ec20 JB |
5756 | } |
5757 | ||
5758 | /* Avoid doing insert/delete char | |
5759 | just cause number of leading spaces differs | |
5f5c8ee5 | 5760 | when the following text does not match. */ |
4588ec20 JB |
5761 | if (begmatch == 0 && osp != nsp) |
5762 | osp = nsp = min (osp, nsp); | |
5763 | ||
5764 | /* Find matching characters at end of line */ | |
5765 | op1 = obody + olen; | |
5766 | np1 = nbody + nlen; | |
5767 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
5768 | while (op1 > op2 |
5769 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
5770 | { |
5771 | op1--; | |
5772 | np1--; | |
5773 | } | |
5774 | endmatch = obody + olen - op1; | |
5775 | ||
4588ec20 JB |
5776 | /* tem gets the distance to insert or delete. |
5777 | endmatch is how many characters we save by doing so. | |
5778 | Is it worth it? */ | |
5779 | ||
5780 | tem = (nlen - nsp) - (olen - osp); | |
5781 | if (endmatch && tem | |
daf01701 | 5782 | && (!FRAME_CHAR_INS_DEL_OK (f) |
8a56675d | 5783 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
5784 | endmatch = 0; |
5785 | ||
5786 | /* nsp - osp is the distance to insert or delete. | |
5787 | If that is nonzero, begmatch is known to be nonzero also. | |
5788 | begmatch + endmatch is how much we save by doing the ins/del. | |
5789 | Is it worth it? */ | |
5790 | ||
5791 | if (nsp != osp | |
daf01701 | 5792 | && (!FRAME_CHAR_INS_DEL_OK (f) |
c363a1d6 | 5793 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
5794 | { |
5795 | begmatch = 0; | |
5796 | endmatch = 0; | |
5797 | osp = nsp = min (osp, nsp); | |
5798 | } | |
5799 | ||
5800 | /* Now go through the line, inserting, writing and | |
5801 | deleting as appropriate. */ | |
5802 | ||
5803 | if (osp > nsp) | |
5804 | { | |
385ed61f KL |
5805 | cursor_to (f, vpos, nsp); |
5806 | delete_glyphs (f, osp - nsp); | |
4588ec20 JB |
5807 | } |
5808 | else if (nsp > osp) | |
5809 | { | |
5810 | /* If going to delete chars later in line | |
5811 | and insert earlier in the line, | |
5812 | must delete first to avoid losing data in the insert */ | |
5813 | if (endmatch && nlen < olen + nsp - osp) | |
5814 | { | |
385ed61f KL |
5815 | cursor_to (f, vpos, nlen - endmatch + osp - nsp); |
5816 | delete_glyphs (f, olen + nsp - osp - nlen); | |
4588ec20 JB |
5817 | olen = nlen - (nsp - osp); |
5818 | } | |
385ed61f KL |
5819 | cursor_to (f, vpos, osp); |
5820 | insert_glyphs (f, 0, nsp - osp); | |
4588ec20 JB |
5821 | } |
5822 | olen += nsp - osp; | |
5823 | ||
5824 | tem = nsp + begmatch + endmatch; | |
5825 | if (nlen != tem || olen != tem) | |
5826 | { | |
4588ec20 JB |
5827 | if (!endmatch || nlen == olen) |
5828 | { | |
c363a1d6 GM |
5829 | /* If new text being written reaches right margin, there is |
5830 | no need to do clear-to-eol at the end of this function | |
5831 | (and it would not be safe, since cursor is not going to | |
5832 | be "at the margin" after the text is done). */ | |
7df02016 | 5833 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 5834 | olen = 0; |
c363a1d6 GM |
5835 | |
5836 | /* Function write_glyphs is prepared to do nothing | |
5837 | if passed a length <= 0. Check it here to avoid | |
5838 | unnecessary cursor movement. */ | |
5839 | if (nlen - tem > 0) | |
5840 | { | |
385ed61f KL |
5841 | cursor_to (f, vpos, nsp + begmatch); |
5842 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
c363a1d6 | 5843 | } |
4588ec20 JB |
5844 | } |
5845 | else if (nlen > olen) | |
5846 | { | |
24e86043 KH |
5847 | /* Here, we used to have the following simple code: |
5848 | ---------------------------------------- | |
5849 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
5850 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
5851 | ---------------------------------------- | |
5852 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
5853 | is a padding glyph. */ | |
5854 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
5855 | int del; | |
5f5c8ee5 | 5856 | |
385ed61f | 5857 | cursor_to (f, vpos, nsp + begmatch); |
177c0ea7 | 5858 | |
5f5c8ee5 | 5859 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
5860 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
5861 | out--; | |
385ed61f | 5862 | write_glyphs (f, nbody + nsp + begmatch, out); |
177c0ea7 | 5863 | |
5f5c8ee5 GM |
5864 | /* If we left columns to be overwritten, we must delete them. */ |
5865 | del = olen - tem - out; | |
c363a1d6 | 5866 | if (del > 0) |
385ed61f | 5867 | delete_glyphs (f, del); |
177c0ea7 | 5868 | |
5f5c8ee5 | 5869 | /* At last, we insert columns not yet written out. */ |
385ed61f | 5870 | insert_glyphs (f, nbody + nsp + begmatch + out, nlen - olen + del); |
5f5c8ee5 GM |
5871 | olen = nlen; |
5872 | } | |
5873 | else if (olen > nlen) | |
5874 | { | |
385ed61f KL |
5875 | cursor_to (f, vpos, nsp + begmatch); |
5876 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
5877 | delete_glyphs (f, olen - nlen); | |
5f5c8ee5 GM |
5878 | olen = nlen; |
5879 | } | |
bd9e3e75 | 5880 | } |
5f5c8ee5 GM |
5881 | |
5882 | just_erase: | |
5883 | /* If any unerased characters remain after the new line, erase them. */ | |
5884 | if (olen > nlen) | |
078b3696 | 5885 | { |
385ed61f KL |
5886 | cursor_to (f, vpos, nlen); |
5887 | clear_end_of_line (f, olen); | |
078b3696 | 5888 | } |
5f5c8ee5 GM |
5889 | |
5890 | /* Exchange contents between current_frame and new_frame. */ | |
5891 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5892 | } |
5f5c8ee5 GM |
5893 | |
5894 | ||
078b3696 | 5895 | \f |
5f5c8ee5 GM |
5896 | /*********************************************************************** |
5897 | X/Y Position -> Buffer Position | |
5898 | ***********************************************************************/ | |
5899 | ||
a1b0a6db | 5900 | /* Determine what's under window-relative pixel position (*X, *Y). |
6a3d9c9f KS |
5901 | Return the object (string or buffer) that's there. |
5902 | Return in *POS the position in that object. | |
5903 | Adjust *X and *Y to character positions. */ | |
5f5c8ee5 | 5904 | |
6a3d9c9f KS |
5905 | Lisp_Object |
5906 | buffer_posn_from_coords (w, x, y, pos, object, dx, dy, width, height) | |
5f5c8ee5 GM |
5907 | struct window *w; |
5908 | int *x, *y; | |
a1b0a6db | 5909 | struct display_pos *pos; |
6a3d9c9f KS |
5910 | Lisp_Object *object; |
5911 | int *dx, *dy; | |
5912 | int *width, *height; | |
4588ec20 | 5913 | { |
5f5c8ee5 GM |
5914 | struct it it; |
5915 | struct buffer *old_current_buffer = current_buffer; | |
5916 | struct text_pos startp; | |
6a3d9c9f KS |
5917 | Lisp_Object string; |
5918 | struct glyph_row *row; | |
cedd7cd9 KS |
5919 | #ifdef HAVE_WINDOW_SYSTEM |
5920 | struct image *img = 0; | |
5921 | #endif | |
ba922d0c | 5922 | int x0, x1; |
5f5c8ee5 GM |
5923 | |
5924 | current_buffer = XBUFFER (w->buffer); | |
5925 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
5926 | CHARPOS (startp) = min (ZV, max (BEGV, CHARPOS (startp))); | |
5927 | BYTEPOS (startp) = min (ZV_BYTE, max (BEGV_BYTE, BYTEPOS (startp))); | |
5928 | start_display (&it, w, startp); | |
177c0ea7 | 5929 | |
ba922d0c KS |
5930 | x0 = *x - WINDOW_LEFT_MARGIN_WIDTH (w); |
5931 | move_it_to (&it, -1, x0 + it.first_visible_x, *y, -1, | |
5f5c8ee5 | 5932 | MOVE_TO_X | MOVE_TO_Y); |
177c0ea7 | 5933 | |
5f5c8ee5 | 5934 | current_buffer = old_current_buffer; |
a1b0a6db | 5935 | |
2d4aac37 KS |
5936 | *dx = x0 + it.first_visible_x - it.current_x; |
5937 | *dy = *y - it.current_y; | |
5938 | ||
6a3d9c9f KS |
5939 | string = w->buffer; |
5940 | if (STRINGP (it.string)) | |
5941 | string = it.string; | |
5942 | *pos = it.current; | |
60bf1629 | 5943 | |
019b1f0e | 5944 | #ifdef HAVE_WINDOW_SYSTEM |
60bf1629 KS |
5945 | if (it.what == IT_IMAGE) |
5946 | { | |
60bf1629 KS |
5947 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5948 | && !NILP (img->spec)) | |
6a3d9c9f KS |
5949 | *object = img->spec; |
5950 | } | |
5951 | #endif | |
60bf1629 | 5952 | |
b70d98e1 KS |
5953 | if (it.vpos < w->current_matrix->nrows |
5954 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5955 | row->enabled_p)) | |
6a3d9c9f KS |
5956 | { |
5957 | if (it.hpos < row->used[TEXT_AREA]) | |
5958 | { | |
5959 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6a3d9c9f | 5960 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5961 | if (img) |
5962 | { | |
5963 | *dy -= row->ascent - glyph->ascent; | |
5964 | *dx += glyph->slice.x; | |
5965 | *dy += glyph->slice.y; | |
5966 | /* Image slices positions are still relative to the entire image */ | |
5967 | *width = img->width; | |
5968 | *height = img->height; | |
5969 | } | |
5970 | else | |
6a3d9c9f | 5971 | #endif |
cedd7cd9 KS |
5972 | { |
5973 | *width = glyph->pixel_width; | |
5974 | *height = glyph->ascent + glyph->descent; | |
5975 | } | |
6a3d9c9f KS |
5976 | } |
5977 | else | |
5978 | { | |
5979 | *width = 0; | |
5980 | *height = row->height; | |
60bf1629 KS |
5981 | } |
5982 | } | |
2d4aac37 | 5983 | else |
6a3d9c9f KS |
5984 | { |
5985 | *width = *height = 0; | |
5986 | } | |
60bf1629 KS |
5987 | |
5988 | /* Add extra (default width) columns if clicked after EOL. */ | |
5989 | x1 = max(0, it.current_x + it.pixel_width - it.first_visible_x); | |
5990 | if (x0 > x1) | |
5991 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5992 | ||
ba922d0c KS |
5993 | *x = it.hpos; |
5994 | *y = it.vpos; | |
6a3d9c9f KS |
5995 | |
5996 | return string; | |
5f5c8ee5 | 5997 | } |
4588ec20 | 5998 | |
5f5c8ee5 GM |
5999 | |
6000 | /* Value is the string under window-relative coordinates X/Y in the | |
6a3d9c9f KS |
6001 | mode line or header line (PART says which) of window W, or nil if none. |
6002 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
6003 | |
6004 | Lisp_Object | |
6a3d9c9f | 6005 | mode_line_string (w, part, x, y, charpos, object, dx, dy, width, height) |
5f5c8ee5 | 6006 | struct window *w; |
641bdbf3 | 6007 | enum window_part part; |
6a3d9c9f | 6008 | int *x, *y; |
5f5c8ee5 | 6009 | int *charpos; |
6a3d9c9f KS |
6010 | Lisp_Object *object; |
6011 | int *dx, *dy; | |
6012 | int *width, *height; | |
5f5c8ee5 GM |
6013 | { |
6014 | struct glyph_row *row; | |
6015 | struct glyph *glyph, *end; | |
2d4aac37 | 6016 | int x0, y0; |
5f5c8ee5 GM |
6017 | Lisp_Object string = Qnil; |
6018 | ||
641bdbf3 | 6019 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
6020 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
6021 | else | |
045dee35 | 6022 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
2d4aac37 | 6023 | y0 = *y - row->y; |
ba922d0c KS |
6024 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); |
6025 | ||
5f5c8ee5 | 6026 | if (row->mode_line_p && row->enabled_p) |
4588ec20 | 6027 | { |
5f5c8ee5 GM |
6028 | /* Find the glyph under X. If we find one with a string object, |
6029 | it's the one we were looking for. */ | |
6030 | glyph = row->glyphs[TEXT_AREA]; | |
6031 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 6032 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
ba922d0c KS |
6033 | x0 -= glyph->pixel_width; |
6034 | *x = glyph - row->glyphs[TEXT_AREA]; | |
6035 | if (glyph < end) | |
6036 | { | |
6037 | string = glyph->object; | |
6038 | *charpos = glyph->charpos; | |
6a3d9c9f KS |
6039 | *width = glyph->pixel_width; |
6040 | *height = glyph->ascent + glyph->descent; | |
6041 | #ifdef HAVE_WINDOW_SYSTEM | |
6042 | if (glyph->type == IMAGE_GLYPH) | |
6043 | { | |
6044 | struct image *img; | |
6045 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
6046 | if (img != NULL) | |
6047 | *object = img->spec; | |
6048 | y0 -= row->ascent - glyph->ascent; | |
6049 | } | |
6050 | #endif | |
ba922d0c KS |
6051 | } |
6052 | else | |
6a3d9c9f KS |
6053 | { |
6054 | /* Add extra (default width) columns if clicked after EOL. */ | |
6055 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
6056 | *width = 0; | |
6057 | *height = row->height; | |
6058 | } | |
4588ec20 | 6059 | } |
ba922d0c | 6060 | else |
2d4aac37 KS |
6061 | { |
6062 | *x = 0; | |
6063 | x0 = 0; | |
6a3d9c9f | 6064 | *width = *height = 0; |
2d4aac37 KS |
6065 | } |
6066 | ||
6a3d9c9f KS |
6067 | *dx = x0; |
6068 | *dy = y0; | |
5f5c8ee5 GM |
6069 | |
6070 | return string; | |
4588ec20 | 6071 | } |
5f5c8ee5 GM |
6072 | |
6073 | ||
db1db309 GM |
6074 | /* Value is the string under window-relative coordinates X/Y in either |
6075 | marginal area, or nil if none. *CHARPOS is set to the position in | |
6076 | the string returned. */ | |
6077 | ||
6078 | Lisp_Object | |
6a3d9c9f | 6079 | marginal_area_string (w, part, x, y, charpos, object, dx, dy, width, height) |
db1db309 | 6080 | struct window *w; |
641bdbf3 | 6081 | enum window_part part; |
6a3d9c9f | 6082 | int *x, *y; |
521069b9 | 6083 | int *charpos; |
6a3d9c9f KS |
6084 | Lisp_Object *object; |
6085 | int *dx, *dy; | |
6086 | int *width, *height; | |
db1db309 GM |
6087 | { |
6088 | struct glyph_row *row = w->current_matrix->rows; | |
6089 | struct glyph *glyph, *end; | |
2d4aac37 | 6090 | int x0, y0, i, wy = *y; |
641bdbf3 | 6091 | int area; |
db1db309 GM |
6092 | Lisp_Object string = Qnil; |
6093 | ||
641bdbf3 | 6094 | if (part == ON_LEFT_MARGIN) |
db1db309 | 6095 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 6096 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
6097 | area = RIGHT_MARGIN_AREA; |
6098 | else | |
6099 | abort (); | |
6100 | ||
6101 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
6102 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
6103 | break; | |
2d4aac37 | 6104 | y0 = *y - row->y; |
ba922d0c | 6105 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); |
db1db309 GM |
6106 | |
6107 | if (row->enabled_p) | |
6108 | { | |
6109 | /* Find the glyph under X. If we find one with a string object, | |
6110 | it's the one we were looking for. */ | |
db1db309 | 6111 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 6112 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
ed8226ea | 6113 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
6114 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) |
6115 | + window_box_width (w, LEFT_MARGIN_AREA) | |
6116 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 6117 | else |
7df02016 | 6118 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
ed8226ea | 6119 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
6120 | : 0); |
6121 | ||
ba922d0c KS |
6122 | glyph = row->glyphs[area]; |
6123 | end = glyph + row->used[area]; | |
cfde341f | 6124 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
ba922d0c KS |
6125 | x0 -= glyph->pixel_width; |
6126 | *x = glyph - row->glyphs[area]; | |
6127 | if (glyph < end) | |
6128 | { | |
6129 | string = glyph->object; | |
6130 | *charpos = glyph->charpos; | |
6a3d9c9f KS |
6131 | *width = glyph->pixel_width; |
6132 | *height = glyph->ascent + glyph->descent; | |
60bf1629 KS |
6133 | #ifdef HAVE_WINDOW_SYSTEM |
6134 | if (glyph->type == IMAGE_GLYPH) | |
6135 | { | |
6136 | struct image *img; | |
6137 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
6138 | if (img != NULL) | |
6a3d9c9f | 6139 | *object = img->spec; |
60bf1629 | 6140 | y0 -= row->ascent - glyph->ascent; |
cedd7cd9 KS |
6141 | x0 += glyph->slice.x; |
6142 | y0 += glyph->slice.y; | |
60bf1629 KS |
6143 | } |
6144 | #endif | |
ba922d0c KS |
6145 | } |
6146 | else | |
6a3d9c9f KS |
6147 | { |
6148 | /* Add extra (default width) columns if clicked after EOL. */ | |
6149 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
6150 | *width = 0; | |
6151 | *height = row->height; | |
6152 | } | |
db1db309 | 6153 | } |
ba922d0c | 6154 | else |
2d4aac37 KS |
6155 | { |
6156 | x0 = 0; | |
6157 | *x = 0; | |
6a3d9c9f | 6158 | *width = *height = 0; |
2d4aac37 KS |
6159 | } |
6160 | ||
6a3d9c9f KS |
6161 | *dx = x0; |
6162 | *dy = y0; | |
db1db309 GM |
6163 | |
6164 | return string; | |
6165 | } | |
6166 | ||
6167 | ||
5f5c8ee5 GM |
6168 | /*********************************************************************** |
6169 | Changing Frame Sizes | |
6170 | ***********************************************************************/ | |
4588ec20 JB |
6171 | |
6172 | #ifdef SIGWINCH | |
5f5c8ee5 | 6173 | |
efb859b4 | 6174 | SIGTYPE |
61cbef47 | 6175 | window_change_signal (signalnum) /* If we don't have an argument, */ |
5f5c8ee5 | 6176 | int signalnum; /* some compilers complain in signal calls. */ |
4588ec20 JB |
6177 | { |
6178 | int width, height; | |
d43721a2 | 6179 | #ifndef USE_CRT_DLL |
4588ec20 | 6180 | extern int errno; |
d43721a2 | 6181 | #endif |
8d3cdf56 | 6182 | int old_errno = errno; |
4588ec20 | 6183 | |
28d7d09f | 6184 | struct tty_display_info *tty; |
4d553a13 | 6185 | |
333f1b6f JD |
6186 | signal (SIGWINCH, window_change_signal); |
6187 | SIGNAL_THREAD_CHECK (signalnum); | |
6188 | ||
9628b887 KL |
6189 | /* The frame size change obviously applies to a single |
6190 | termcap-controlled terminal, but we can't decide which. | |
6191 | Therefore, we resize the frames corresponding to each tty. | |
9628b887 KL |
6192 | */ |
6193 | for (tty = tty_list; tty; tty = tty->next) { | |
6194 | ||
0a125897 KL |
6195 | if (! tty->term_initted) |
6196 | continue; | |
4d553a13 | 6197 | |
0b0d3e0b | 6198 | get_tty_size (fileno (tty->input), &width, &height); |
9628b887 | 6199 | |
bedeffcf | 6200 | if (width > 5 && height > 2) { |
9628b887 KL |
6201 | Lisp_Object tail, frame; |
6202 | ||
6203 | FOR_EACH_FRAME (tail, frame) | |
4d553a13 KL |
6204 | if (FRAME_TERMCAP_P (XFRAME (frame)) && FRAME_TTY (XFRAME (frame)) == tty) |
6205 | /* Record the new sizes, but don't reallocate the data | |
6206 | structures now. Let that be done later outside of the | |
6207 | signal handler. */ | |
6208 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); | |
9628b887 | 6209 | } |
4588ec20 | 6210 | } |
9628b887 | 6211 | |
4588ec20 JB |
6212 | errno = old_errno; |
6213 | } | |
6214 | #endif /* SIGWINCH */ | |
6215 | ||
6216 | ||
b96fd3e8 GM |
6217 | /* Do any change in frame size that was requested by a signal. SAFE |
6218 | non-zero means this function is called from a place where it is | |
6219 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 6220 | |
dfcf069d | 6221 | void |
b96fd3e8 GM |
6222 | do_pending_window_change (safe) |
6223 | int safe; | |
4588ec20 JB |
6224 | { |
6225 | /* If window_change_signal should have run before, run it now. */ | |
b96fd3e8 GM |
6226 | if (redisplaying_p && !safe) |
6227 | return; | |
177c0ea7 | 6228 | |
4588ec20 JB |
6229 | while (delayed_size_change) |
6230 | { | |
35f56f96 | 6231 | Lisp_Object tail, frame; |
4588ec20 JB |
6232 | |
6233 | delayed_size_change = 0; | |
6234 | ||
35f56f96 | 6235 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 6236 | { |
5f5c8ee5 | 6237 | struct frame *f = XFRAME (frame); |
35f56f96 | 6238 | |
7df02016 KS |
6239 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
6240 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
6241 | 0, 0, safe); | |
4588ec20 JB |
6242 | } |
6243 | } | |
6244 | } | |
6245 | ||
6246 | ||
502b9b64 | 6247 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 6248 | indicate no change is to take place. |
4588ec20 | 6249 | |
b6a65ac2 JB |
6250 | If DELAY is non-zero, then assume we're being called from a signal |
6251 | handler, and queue the change for later - perhaps the next | |
6252 | redisplay. Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
6253 | from a signal handler. |
6254 | ||
6255 | SAFE non-zero means this function is called from a place where it's | |
6256 | safe to change frame sizes while a redisplay is in progress. */ | |
b6a65ac2 | 6257 | |
dfcf069d | 6258 | void |
b96fd3e8 | 6259 | change_frame_size (f, newheight, newwidth, pretend, delay, safe) |
5f5c8ee5 | 6260 | register struct frame *f; |
b96fd3e8 | 6261 | int newheight, newwidth, pretend, delay, safe; |
45140e01 RS |
6262 | { |
6263 | Lisp_Object tail, frame; | |
3826ea1a | 6264 | |
9628b887 | 6265 | if (FRAME_MSDOS_P (f)) |
45140e01 | 6266 | { |
9628b887 KL |
6267 | /* On MS-DOS, all frames use the same screen, so a change in |
6268 | size affects all frames. Termcap now supports multiple | |
6269 | ttys. */ | |
45140e01 | 6270 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 6271 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 6272 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 6273 | pretend, delay, safe); |
45140e01 RS |
6274 | } |
6275 | else | |
b96fd3e8 | 6276 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
6277 | } |
6278 | ||
6279 | static void | |
b96fd3e8 | 6280 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe) |
5f5c8ee5 | 6281 | register struct frame *f; |
b96fd3e8 | 6282 | int newheight, newwidth, pretend, delay, safe; |
4588ec20 | 6283 | { |
7df02016 | 6284 | int new_frame_total_cols; |
aed13378 | 6285 | int count = SPECPDL_INDEX (); |
3826ea1a | 6286 | |
4588ec20 | 6287 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 6288 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 6289 | { |
7df02016 KS |
6290 | f->new_text_lines = newheight; |
6291 | f->new_text_cols = newwidth; | |
4588ec20 JB |
6292 | delayed_size_change = 1; |
6293 | return; | |
6294 | } | |
6295 | ||
502b9b64 | 6296 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
6297 | f->new_text_lines = 0; |
6298 | f->new_text_cols = 0; | |
b6a65ac2 | 6299 | |
08f7aa3e | 6300 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 6301 | if (newheight == 0) |
7df02016 | 6302 | newheight = FRAME_LINES (f); |
ae19c6f2 | 6303 | if (newwidth == 0) |
7df02016 | 6304 | newwidth = FRAME_COLS (f); |
3826ea1a | 6305 | |
5f5c8ee5 GM |
6306 | /* Compute width of windows in F. |
6307 | This is the width of the frame without vertical scroll bars. */ | |
7df02016 | 6308 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); |
3826ea1a | 6309 | |
b6a65ac2 | 6310 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 6311 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 JB |
6312 | |
6313 | /* If we're not changing the frame size, quit now. */ | |
7df02016 KS |
6314 | if (newheight == FRAME_LINES (f) |
6315 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) | |
4588ec20 JB |
6316 | return; |
6317 | ||
cbb95688 RS |
6318 | BLOCK_INPUT; |
6319 | ||
886a8a6c KH |
6320 | #ifdef MSDOS |
6321 | /* We only can set screen dimensions to certain values supported | |
6322 | by our video hardware. Try to find the smallest size greater | |
6323 | or equal to the requested dimensions. */ | |
6324 | dos_set_window_size (&newheight, &newwidth); | |
6325 | #endif | |
6326 | ||
7df02016 | 6327 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 6328 | { |
5f5c8ee5 | 6329 | if (FRAME_HAS_MINIBUF_P (f) && !FRAME_MINIBUF_ONLY_P (f)) |
4588ec20 | 6330 | { |
5f5c8ee5 | 6331 | /* Frame has both root and mini-buffer. */ |
7df02016 | 6332 | XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f))->top_line, |
5f5c8ee5 GM |
6333 | FRAME_TOP_MARGIN (f)); |
6334 | set_window_height (FRAME_ROOT_WINDOW (f), | |
6335 | (newheight | |
6336 | - 1 | |
6337 | - FRAME_TOP_MARGIN (f)), | |
6338 | 0); | |
7df02016 | 6339 | XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top_line, |
a5d8b611 | 6340 | newheight - 1); |
5f5c8ee5 | 6341 | set_window_height (FRAME_MINIBUF_WINDOW (f), 1, 0); |
4588ec20 JB |
6342 | } |
6343 | else | |
502b9b64 | 6344 | /* Frame has just one top-level window. */ |
5f5c8ee5 GM |
6345 | set_window_height (FRAME_ROOT_WINDOW (f), |
6346 | newheight - FRAME_TOP_MARGIN (f), 0); | |
b6a65ac2 | 6347 | |
5f5c8ee5 | 6348 | if (FRAME_TERMCAP_P (f) && !pretend) |
6548cf00 | 6349 | FrameRows (FRAME_TTY (f)) = newheight; |
4588ec20 JB |
6350 | } |
6351 | ||
7df02016 | 6352 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 6353 | { |
7df02016 | 6354 | set_window_width (FRAME_ROOT_WINDOW (f), new_frame_total_cols, 0); |
5f5c8ee5 | 6355 | if (FRAME_HAS_MINIBUF_P (f)) |
7df02016 | 6356 | set_window_width (FRAME_MINIBUF_WINDOW (f), new_frame_total_cols, 0); |
4588ec20 | 6357 | |
5f5c8ee5 | 6358 | if (FRAME_TERMCAP_P (f) && !pretend) |
6548cf00 | 6359 | FrameCols (FRAME_TTY (f)) = newwidth; |
5f5c8ee5 | 6360 | |
9ea173e8 | 6361 | if (WINDOWP (f->tool_bar_window)) |
7df02016 | 6362 | XSETFASTINT (XWINDOW (f->tool_bar_window)->total_cols, newwidth); |
4588ec20 JB |
6363 | } |
6364 | ||
7df02016 KS |
6365 | FRAME_LINES (f) = newheight; |
6366 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 6367 | |
5f5c8ee5 GM |
6368 | { |
6369 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
6370 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 6371 | |
5f5c8ee5 GM |
6372 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
6373 | &text_area_height); | |
6374 | if (w->cursor.x >= text_area_x + text_area_width) | |
6375 | w->cursor.hpos = w->cursor.x = 0; | |
6376 | if (w->cursor.y >= text_area_y + text_area_height) | |
6377 | w->cursor.vpos = w->cursor.y = 0; | |
6378 | } | |
986e61b8 | 6379 | |
5f5c8ee5 | 6380 | adjust_glyphs (f); |
5f5c8ee5 | 6381 | calculate_costs (f); |
cb02fa39 GM |
6382 | SET_FRAME_GARBAGED (f); |
6383 | f->resized_p = 1; | |
97cf50e7 RS |
6384 | |
6385 | UNBLOCK_INPUT; | |
61730a69 | 6386 | |
e523f7e5 RS |
6387 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); |
6388 | ||
ef264c42 | 6389 | run_window_configuration_change_hook (f); |
e523f7e5 RS |
6390 | |
6391 | unbind_to (count, Qnil); | |
4588ec20 | 6392 | } |
5f5c8ee5 GM |
6393 | |
6394 | ||
4588ec20 | 6395 | \f |
5f5c8ee5 GM |
6396 | /*********************************************************************** |
6397 | Terminal Related Lisp Functions | |
6398 | ***********************************************************************/ | |
6399 | ||
6400 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 6401 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
6402 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
6403 | FILE = nil means just close any termscript file currently open. */) | |
6404 | (file) | |
5f5c8ee5 GM |
6405 | Lisp_Object file; |
6406 | { | |
0b0d3e0b KL |
6407 | struct tty_display_info *tty; |
6408 | ||
6409 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ())) | |
6410 | error ("Current frame is not on a tty device"); | |
6411 | ||
6412 | tty = CURTTY (); | |
6413 | ||
6414 | if (tty->termscript != 0) | |
e18c7093 KL |
6415 | { |
6416 | BLOCK_INPUT; | |
0b0d3e0b | 6417 | fclose (tty->termscript); |
e18c7093 KL |
6418 | UNBLOCK_INPUT; |
6419 | } | |
0b0d3e0b | 6420 | tty->termscript = 0; |
5f5c8ee5 GM |
6421 | |
6422 | if (! NILP (file)) | |
6423 | { | |
6424 | file = Fexpand_file_name (file, Qnil); | |
0b0d3e0b KL |
6425 | tty->termscript = fopen (SDATA (file), "w"); |
6426 | if (tty->termscript == 0) | |
5f5c8ee5 GM |
6427 | report_file_error ("Opening termscript", Fcons (file, Qnil)); |
6428 | } | |
6429 | return Qnil; | |
6430 | } | |
6431 | ||
6432 | ||
4588ec20 | 6433 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
62af879c | 6434 | Ssend_string_to_terminal, 1, 2, 0, |
7ee72033 | 6435 | doc: /* Send STRING to the terminal without alteration. |
62af879c KL |
6436 | Control characters in STRING will have terminal-dependent effects. |
6437 | ||
6ed8eeff | 6438 | Optional parameter TERMINAL specifies the tty terminal device to use. |
62af879c KL |
6439 | It may be a terminal id, a frame, or nil for the terminal used by the |
6440 | currently selected frame. */) | |
6ed8eeff | 6441 | (string, terminal) |
e912ba09 | 6442 | Lisp_Object string; |
6ed8eeff | 6443 | Lisp_Object terminal; |
4588ec20 | 6444 | { |
717a00ef | 6445 | struct terminal *t = get_tty_terminal (terminal, 1); |
0b0d3e0b KL |
6446 | struct tty_display_info *tty; |
6447 | ||
94f3db62 | 6448 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 6449 | CHECK_STRING (string); |
2c1e4409 | 6450 | BLOCK_INPUT; |
0b0d3e0b | 6451 | |
6ed8eeff KL |
6452 | if (!t) |
6453 | error ("Unknown terminal device"); | |
0b0d3e0b | 6454 | |
6ed8eeff | 6455 | tty = t->display_info.tty; |
daf01701 | 6456 | |
0b0d3e0b | 6457 | if (tty->termscript) |
4588ec20 | 6458 | { |
0b0d3e0b KL |
6459 | fwrite (SDATA (string), 1, SBYTES (string), tty->termscript); |
6460 | fflush (tty->termscript); | |
4588ec20 | 6461 | } |
0b0d3e0b KL |
6462 | fwrite (SDATA (string), 1, SBYTES (string), tty->output); |
6463 | fflush (tty->output); | |
2c1e4409 | 6464 | UNBLOCK_INPUT; |
4588ec20 JB |
6465 | return Qnil; |
6466 | } | |
6467 | ||
5f5c8ee5 | 6468 | |
4588ec20 | 6469 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 6470 | doc: /* Beep, or flash the screen. |
228299fa | 6471 | Also, unless an argument is given, |
7ee72033 MB |
6472 | terminate any keyboard macro currently executing. */) |
6473 | (arg) | |
4588ec20 JB |
6474 | Lisp_Object arg; |
6475 | { | |
efb859b4 | 6476 | if (!NILP (arg)) |
4588ec20 | 6477 | { |
7fa788da RS |
6478 | if (noninteractive) |
6479 | putchar (07); | |
6480 | else | |
385ed61f | 6481 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
6482 | } |
6483 | else | |
6484 | bitch_at_user (); | |
6485 | ||
6486 | return Qnil; | |
6487 | } | |
6488 | ||
dfcf069d | 6489 | void |
4588ec20 JB |
6490 | bitch_at_user () |
6491 | { | |
6492 | if (noninteractive) | |
6493 | putchar (07); | |
5f5c8ee5 | 6494 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
4588ec20 JB |
6495 | error ("Keyboard macro terminated by a command ringing the bell"); |
6496 | else | |
385ed61f | 6497 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
6498 | } |
6499 | ||
5f5c8ee5 GM |
6500 | |
6501 | \f | |
6502 | /*********************************************************************** | |
6503 | Sleeping, Waiting | |
6504 | ***********************************************************************/ | |
6505 | ||
4588ec20 | 6506 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 6507 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
6508 | SECONDS may be a floating-point value, meaning that you can wait for a |
6509 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
6510 | additional wait period, in milliseconds; this may be useful if your | |
6511 | Emacs was built without floating point support. | |
7ee72033 MB |
6512 | \(Not all operating systems support waiting for a fraction of a second.) */) |
6513 | (seconds, milliseconds) | |
767229f8 | 6514 | Lisp_Object seconds, milliseconds; |
4588ec20 | 6515 | { |
767229f8 | 6516 | int sec, usec; |
4588ec20 | 6517 | |
767229f8 | 6518 | if (NILP (milliseconds)) |
e9c9a718 | 6519 | XSETINT (milliseconds, 0); |
767229f8 | 6520 | else |
b7826503 | 6521 | CHECK_NUMBER (milliseconds); |
b07646f5 JB |
6522 | usec = XINT (milliseconds) * 1000; |
6523 | ||
b07646f5 JB |
6524 | { |
6525 | double duration = extract_float (seconds); | |
6526 | sec = (int) duration; | |
6527 | usec += (duration - sec) * 1000000; | |
6528 | } | |
4588ec20 | 6529 | |
a41f8bed | 6530 | #ifndef EMACS_HAS_USECS |
767229f8 | 6531 | if (sec == 0 && usec != 0) |
861e19b9 | 6532 | error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); |
4588ec20 | 6533 | #endif |
767229f8 JB |
6534 | |
6535 | /* Assure that 0 <= usec < 1000000. */ | |
6536 | if (usec < 0) | |
6537 | { | |
153a073c | 6538 | /* We can't rely on the rounding being correct if usec is negative. */ |
767229f8 JB |
6539 | if (-1000000 < usec) |
6540 | sec--, usec += 1000000; | |
6541 | else | |
6542 | sec -= -usec / 1000000, usec = 1000000 - (-usec % 1000000); | |
4588ec20 | 6543 | } |
767229f8 JB |
6544 | else |
6545 | sec += usec / 1000000, usec %= 1000000; | |
6546 | ||
6b5153b1 | 6547 | if (sec < 0 || (sec == 0 && usec == 0)) |
767229f8 | 6548 | return Qnil; |
4588ec20 | 6549 | |
dcd1ca45 | 6550 | wait_reading_process_output (sec, usec, 0, 0, Qnil, NULL, 0); |
4588ec20 JB |
6551 | |
6552 | return Qnil; | |
6553 | } | |
6554 | ||
5f5c8ee5 | 6555 | |
dcd1ca45 | 6556 | /* This is just like wait_reading_process_output, except that |
902b9b6d | 6557 | it does redisplay. |
f76475ad | 6558 | |
2bcac766 CY |
6559 | TIMEOUT is number of seconds to wait (float or integer), |
6560 | or t to wait forever. | |
902b9b6d KS |
6561 | READING is 1 if reading input. |
6562 | If DO_DISPLAY is >0 display process output while waiting. | |
6563 | If DO_DISPLAY is >1 perform an initial redisplay before waiting. | |
6564 | */ | |
4588ec20 | 6565 | |
f76475ad | 6566 | Lisp_Object |
902b9b6d KS |
6567 | sit_for (timeout, reading, do_display) |
6568 | Lisp_Object timeout; | |
6569 | int reading, do_display; | |
f76475ad | 6570 | { |
902b9b6d | 6571 | int sec, usec; |
f222369e | 6572 | |
902b9b6d | 6573 | swallow_events (do_display); |
ccddf474 | 6574 | |
902b9b6d | 6575 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 6576 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 6577 | return Qnil; |
4588ec20 | 6578 | |
902b9b6d KS |
6579 | if (do_display >= 2) |
6580 | redisplay_preserve_echo_area (2); | |
6581 | ||
8e09f23f | 6582 | if (INTEGERP (timeout)) |
f222369e | 6583 | { |
7ff14773 | 6584 | sec = XINT (timeout); |
8e09f23f | 6585 | usec = 0; |
f222369e | 6586 | } |
8e09f23f KS |
6587 | else if (FLOATP (timeout)) |
6588 | { | |
99a20368 | 6589 | double seconds = XFLOAT_DATA (timeout); |
902b9b6d KS |
6590 | sec = (int) seconds; |
6591 | usec = (int) ((seconds - sec) * 1000000); | |
6592 | } | |
2bcac766 CY |
6593 | else if (EQ (timeout, Qt)) |
6594 | { | |
6595 | sec = 0; | |
6596 | usec = 0; | |
6597 | } | |
902b9b6d | 6598 | else |
8e09f23f | 6599 | wrong_type_argument (Qnumberp, timeout); |
4588ec20 | 6600 | |
2bcac766 | 6601 | if (sec == 0 && usec == 0 && !EQ (timeout, Qt)) |
dfdb645c JB |
6602 | return Qt; |
6603 | ||
4588ec20 | 6604 | #ifdef SIGIO |
8fc798e9 | 6605 | gobble_input (0); |
f76475ad JB |
6606 | #endif |
6607 | ||
902b9b6d | 6608 | wait_reading_process_output (sec, usec, reading ? -1 : 1, do_display, |
dcd1ca45 | 6609 | Qnil, NULL, 0); |
f76475ad | 6610 | |
4588ec20 JB |
6611 | return detect_input_pending () ? Qnil : Qt; |
6612 | } | |
6613 | ||
5f5c8ee5 | 6614 | |
01327edf KS |
6615 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
6616 | doc: /* Perform redisplay if no input is available. | |
a5c2c707 | 6617 | If optional arg FORCE is non-nil or `redisplay-dont-pause' is non-nil, |
03240971 KS |
6618 | perform a full redisplay even if input is available. |
6619 | Return t if redisplay was performed, nil otherwise. */) | |
01327edf KS |
6620 | (force) |
6621 | Lisp_Object force; | |
f76475ad | 6622 | { |
01327edf | 6623 | int count; |
f76475ad | 6624 | |
902b9b6d KS |
6625 | swallow_events (1); |
6626 | if ((detect_input_pending_run_timers (1) | |
01327edf | 6627 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
6628 | || !NILP (Vexecuting_kbd_macro)) |
6629 | return Qnil; | |
f76475ad | 6630 | |
01327edf KS |
6631 | count = SPECPDL_INDEX (); |
6632 | if (!NILP (force) && !redisplay_dont_pause) | |
6633 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 6634 | redisplay_preserve_echo_area (2); |
01327edf | 6635 | unbind_to (count, Qnil); |
7ba07a1a | 6636 | return Qt; |
f76475ad | 6637 | } |
5f5c8ee5 GM |
6638 | |
6639 | ||
6640 | \f | |
6641 | /*********************************************************************** | |
6642 | Other Lisp Functions | |
6643 | ***********************************************************************/ | |
6644 | ||
6645 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
6646 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 6647 | buffer-modified-flags. */ |
5f5c8ee5 GM |
6648 | |
6649 | static Lisp_Object frame_and_buffer_state; | |
6650 | ||
6651 | ||
6652 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 6653 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 6654 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
6655 | VARIABLE is a variable name whose value is either nil or a state vector |
6656 | that will be updated to contain all frames and buffers, | |
228299fa | 6657 | aside from buffers whose names start with space, |
44edd521 RS |
6658 | along with the buffers' read-only and modified flags. This allows a fast |
6659 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 6660 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
6661 | the current state. |
6662 | ||
6663 | If VARIABLE is nil, an internal variable is used. Users should not | |
6664 | pass nil for VARIABLE. */) | |
6665 | (variable) | |
6666 | Lisp_Object variable; | |
5f5c8ee5 | 6667 | { |
44edd521 RS |
6668 | Lisp_Object state, tail, frame, buf; |
6669 | Lisp_Object *vecp, *end; | |
5f5c8ee5 GM |
6670 | int n; |
6671 | ||
44edd521 RS |
6672 | if (! NILP (variable)) |
6673 | { | |
6674 | CHECK_SYMBOL (variable); | |
6675 | state = Fsymbol_value (variable); | |
6676 | if (! VECTORP (state)) | |
6677 | goto changed; | |
6678 | } | |
6679 | else | |
6680 | state = frame_and_buffer_state; | |
6681 | ||
6682 | vecp = XVECTOR (state)->contents; | |
6683 | end = vecp + XVECTOR (state)->size; | |
6684 | ||
5f5c8ee5 GM |
6685 | FOR_EACH_FRAME (tail, frame) |
6686 | { | |
44edd521 RS |
6687 | if (vecp == end) |
6688 | goto changed; | |
5f5c8ee5 GM |
6689 | if (!EQ (*vecp++, frame)) |
6690 | goto changed; | |
44edd521 RS |
6691 | if (vecp == end) |
6692 | goto changed; | |
5f5c8ee5 GM |
6693 | if (!EQ (*vecp++, XFRAME (frame)->name)) |
6694 | goto changed; | |
6695 | } | |
44edd521 | 6696 | /* Check that the buffer info matches. */ |
7539e11f | 6697 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6698 | { |
7539e11f | 6699 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6700 | /* Ignore buffers that aren't included in buffer lists. */ |
d5db4077 | 6701 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
5f5c8ee5 | 6702 | continue; |
44edd521 RS |
6703 | if (vecp == end) |
6704 | goto changed; | |
5f5c8ee5 GM |
6705 | if (!EQ (*vecp++, buf)) |
6706 | goto changed; | |
44edd521 RS |
6707 | if (vecp == end) |
6708 | goto changed; | |
5f5c8ee5 GM |
6709 | if (!EQ (*vecp++, XBUFFER (buf)->read_only)) |
6710 | goto changed; | |
44edd521 RS |
6711 | if (vecp == end) |
6712 | goto changed; | |
5f5c8ee5 GM |
6713 | if (!EQ (*vecp++, Fbuffer_modified_p (buf))) |
6714 | goto changed; | |
6715 | } | |
44edd521 RS |
6716 | if (vecp == end) |
6717 | goto changed; | |
5f5c8ee5 GM |
6718 | /* Detect deletion of a buffer at the end of the list. */ |
6719 | if (EQ (*vecp, Qlambda)) | |
6720 | return Qnil; | |
44edd521 RS |
6721 | |
6722 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 6723 | changed: |
44edd521 RS |
6724 | /* Count the size we will need. |
6725 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
6726 | n = 1; |
6727 | FOR_EACH_FRAME (tail, frame) | |
6728 | n += 2; | |
7539e11f | 6729 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6730 | n += 3; |
44edd521 RS |
6731 | /* Reallocate the vector if data has grown to need it, |
6732 | or if it has shrunk a lot. */ | |
6733 | if (! VECTORP (state) | |
6734 | || n > XVECTOR (state)->size | |
6735 | || n + 20 < XVECTOR (state)->size / 2) | |
5f5c8ee5 | 6736 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
6737 | { |
6738 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
6739 | if (! NILP (variable)) | |
6740 | Fset (variable, state); | |
6741 | else | |
6742 | frame_and_buffer_state = state; | |
6743 | } | |
6744 | ||
6745 | /* Record the new data in the (possibly reallocated) vector. */ | |
6746 | vecp = XVECTOR (state)->contents; | |
5f5c8ee5 GM |
6747 | FOR_EACH_FRAME (tail, frame) |
6748 | { | |
6749 | *vecp++ = frame; | |
6750 | *vecp++ = XFRAME (frame)->name; | |
6751 | } | |
7539e11f | 6752 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6753 | { |
7539e11f | 6754 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6755 | /* Ignore buffers that aren't included in buffer lists. */ |
d5db4077 | 6756 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
5f5c8ee5 GM |
6757 | continue; |
6758 | *vecp++ = buf; | |
6759 | *vecp++ = XBUFFER (buf)->read_only; | |
6760 | *vecp++ = Fbuffer_modified_p (buf); | |
6761 | } | |
6762 | /* Fill up the vector with lambdas (always at least one). */ | |
6763 | *vecp++ = Qlambda; | |
44edd521 RS |
6764 | while (vecp - XVECTOR (state)->contents |
6765 | < XVECTOR (state)->size) | |
5f5c8ee5 GM |
6766 | *vecp++ = Qlambda; |
6767 | /* Make sure we didn't overflow the vector. */ | |
44edd521 RS |
6768 | if (vecp - XVECTOR (state)->contents |
6769 | > XVECTOR (state)->size) | |
5f5c8ee5 GM |
6770 | abort (); |
6771 | return Qt; | |
6772 | } | |
6773 | ||
6774 | ||
4588ec20 | 6775 | \f |
5f5c8ee5 GM |
6776 | /*********************************************************************** |
6777 | Initialization | |
6778 | ***********************************************************************/ | |
6779 | ||
5f5c8ee5 GM |
6780 | /* Initialization done when Emacs fork is started, before doing stty. |
6781 | Determine terminal type and set terminal_driver. Then invoke its | |
6782 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 6783 | |
dfcf069d | 6784 | void |
4588ec20 JB |
6785 | init_display () |
6786 | { | |
28d440ab KL |
6787 | char *terminal_type; |
6788 | ||
4588ec20 JB |
6789 | #ifdef HAVE_X_WINDOWS |
6790 | extern int display_arg; | |
6791 | #endif | |
6792 | ||
5f5c8ee5 GM |
6793 | /* Construct the space glyph. */ |
6794 | space_glyph.type = CHAR_GLYPH; | |
6795 | SET_CHAR_GLYPH_FROM_GLYPH (space_glyph, ' '); | |
6796 | space_glyph.charpos = -1; | |
6797 | ||
4588ec20 JB |
6798 | inverse_video = 0; |
6799 | cursor_in_echo_area = 0; | |
6800 | terminal_type = (char *) 0; | |
6801 | ||
1315c181 JB |
6802 | /* Now is the time to initialize this; it's used by init_sys_modes |
6803 | during startup. */ | |
2246281f | 6804 | Vinitial_window_system = Qnil; |
4588ec20 | 6805 | |
4181ad9c KL |
6806 | /* SIGWINCH needs to be handled no matter what display we start |
6807 | with. Otherwise newly opened tty frames will not resize | |
6808 | automatically. */ | |
6809 | #ifdef SIGWINCH | |
6810 | #ifndef CANNOT_DUMP | |
6811 | if (initialized) | |
6812 | #endif /* CANNOT_DUMP */ | |
6813 | signal (SIGWINCH, window_change_signal); | |
6814 | #endif /* SIGWINCH */ | |
6815 | ||
1315c181 JB |
6816 | /* If the user wants to use a window system, we shouldn't bother |
6817 | initializing the terminal. This is especially important when the | |
6818 | terminal is so dumb that emacs gives up before and doesn't bother | |
6819 | using the window system. | |
4588ec20 | 6820 | |
36bbad1d KH |
6821 | If the DISPLAY environment variable is set and nonempty, |
6822 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6823 | |
6824 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 6825 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 6826 | { |
36bbad1d | 6827 | char *display; |
d460af17 | 6828 | #ifdef VMS |
36bbad1d | 6829 | display = getenv ("DECW$DISPLAY"); |
d460af17 | 6830 | #else |
36bbad1d | 6831 | display = getenv ("DISPLAY"); |
d460af17 | 6832 | #endif |
36bbad1d KH |
6833 | |
6834 | display_arg = (display != 0 && *display != 0); | |
c1fc674b AS |
6835 | |
6836 | if (display_arg && !x_display_ok (display)) | |
6837 | { | |
6838 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
6839 | display); | |
6840 | inhibit_window_system = 1; | |
6841 | } | |
f040093a | 6842 | } |
d460af17 | 6843 | |
177c0ea7 | 6844 | if (!inhibit_window_system && display_arg |
9e4555e8 RS |
6845 | #ifndef CANNOT_DUMP |
6846 | && initialized | |
6847 | #endif | |
6848 | ) | |
4588ec20 | 6849 | { |
2246281f | 6850 | Vinitial_window_system = intern ("x"); |
4588ec20 JB |
6851 | #ifdef HAVE_X11 |
6852 | Vwindow_system_version = make_number (11); | |
6853 | #else | |
6854 | Vwindow_system_version = make_number (10); | |
039e5d71 | 6855 | #endif |
8a2a6032 | 6856 | #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES) |
039e5d71 | 6857 | /* In some versions of ncurses, |
6a428f77 | 6858 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6859 | So call tgetent. */ |
6860 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 | 6861 | #endif |
5f5c8ee5 | 6862 | adjust_frame_glyphs_initially (); |
4588ec20 JB |
6863 | return; |
6864 | } | |
6865 | #endif /* HAVE_X_WINDOWS */ | |
6866 | ||
fd2e066a | 6867 | #ifdef HAVE_NTGUI |
177c0ea7 | 6868 | if (!inhibit_window_system) |
fd2e066a | 6869 | { |
2246281f | 6870 | Vinitial_window_system = intern ("w32"); |
fd2e066a | 6871 | Vwindow_system_version = make_number (1); |
5f5c8ee5 | 6872 | adjust_frame_glyphs_initially (); |
fd2e066a GV |
6873 | return; |
6874 | } | |
6875 | #endif /* HAVE_NTGUI */ | |
6876 | ||
e0f712ba | 6877 | #ifdef MAC_OS |
177c0ea7 | 6878 | if (!inhibit_window_system) |
1a578e9b | 6879 | { |
2246281f | 6880 | Vinitial_window_system = intern ("mac"); |
1a578e9b AC |
6881 | Vwindow_system_version = make_number (1); |
6882 | adjust_frame_glyphs_initially (); | |
6883 | return; | |
6884 | } | |
e0f712ba | 6885 | #endif /* MAC_OS */ |
1a578e9b | 6886 | |
4588ec20 JB |
6887 | /* If no window system has been specified, try to use the terminal. */ |
6888 | if (! isatty (0)) | |
6889 | { | |
1559a86d | 6890 | fatal ("standard input is not a tty"); |
4588ec20 JB |
6891 | exit (1); |
6892 | } | |
6893 | ||
6152361f JR |
6894 | #ifdef WINDOWSNT |
6895 | terminal_type = "w32console"; | |
6896 | #else | |
153a073c | 6897 | /* Look at the TERM variable. */ |
4588ec20 | 6898 | terminal_type = (char *) getenv ("TERM"); |
6152361f | 6899 | #endif |
4588ec20 JB |
6900 | if (!terminal_type) |
6901 | { | |
6902 | #ifdef VMS | |
6903 | fprintf (stderr, "Please specify your terminal type.\n\ | |
6904 | For types defined in VMS, use set term /device=TYPE.\n\ | |
6905 | For types not defined in VMS, use define emacs_term \"TYPE\".\n\ | |
6906 | \(The quotation marks are necessary since terminal types are lower case.)\n"); | |
5d12ff0b RS |
6907 | #else /* not VMS */ |
6908 | ||
6909 | #ifdef HAVE_WINDOW_SYSTEM | |
b9e590fc RS |
6910 | if (! inhibit_window_system) |
6911 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6912 | else |
6913 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6914 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
5d12ff0b | 6915 | #endif /* not VMS */ |
4588ec20 JB |
6916 | exit (1); |
6917 | } | |
6918 | ||
6919 | #ifdef VMS | |
5f5c8ee5 | 6920 | /* VMS DCL tends to up-case things, so down-case term type. |
4588ec20 JB |
6921 | Hardly any uppercase letters in terminal types; should be none. */ |
6922 | { | |
6923 | char *new = (char *) xmalloc (strlen (terminal_type) + 1); | |
6924 | char *p; | |
6925 | ||
6926 | strcpy (new, terminal_type); | |
6927 | ||
6928 | for (p = new; *p; p++) | |
6929 | if (isupper (*p)) | |
6930 | *p = tolower (*p); | |
6931 | ||
6932 | terminal_type = new; | |
177c0ea7 | 6933 | } |
5f5c8ee5 | 6934 | #endif /* VMS */ |
4588ec20 | 6935 | |
0a125897 | 6936 | { |
6ed8eeff | 6937 | struct terminal *t; |
3224dac1 KL |
6938 | struct frame *f = XFRAME (selected_frame); |
6939 | ||
6940 | /* Open a display on the controlling tty. */ | |
6ed8eeff | 6941 | t = init_tty (0, terminal_type, 1); /* Errors are fatal. */ |
3224dac1 KL |
6942 | |
6943 | /* Convert the initial frame to use the new display. */ | |
b04f5ad2 | 6944 | if (f->output_method != output_initial) |
3224dac1 | 6945 | abort (); |
6ed8eeff KL |
6946 | f->output_method = t->type; |
6947 | f->terminal = t; | |
3224dac1 | 6948 | |
6ed8eeff KL |
6949 | t->reference_count++; |
6950 | t->display_info.tty->top_frame = selected_frame; | |
5b65d888 | 6951 | change_frame_size (XFRAME (selected_frame), |
6ed8eeff KL |
6952 | FrameRows (t->display_info.tty), |
6953 | FrameCols (t->display_info.tty), 0, 0, 1); | |
3224dac1 | 6954 | |
6ed8eeff KL |
6955 | /* Delete the initial terminal. */ |
6956 | if (--initial_terminal->reference_count == 0 | |
6957 | && initial_terminal->delete_terminal_hook) | |
6958 | (*initial_terminal->delete_terminal_hook) (initial_terminal); | |
2666355c KL |
6959 | |
6960 | /* Update frame parameters to reflect the new type. */ | |
6961 | Fmodify_frame_parameters | |
6962 | (selected_frame, Fcons (Fcons (Qtty_type, | |
6ed8eeff | 6963 | Ftty_type (selected_frame)), Qnil)); |
5b65d888 | 6964 | Fmodify_frame_parameters (selected_frame, Fcons (Fcons (Qtty, Qnil), Qnil)); |
0a125897 KL |
6965 | } |
6966 | ||
d86c299a | 6967 | { |
91fb7e1b | 6968 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6969 | int width = FRAME_TOTAL_COLS (sf); |
6970 | int height = FRAME_LINES (sf); | |
d86c299a | 6971 | |
5f5c8ee5 | 6972 | unsigned int total_glyphs = height * (width + 2) * sizeof (struct glyph); |
d86c299a | 6973 | |
5f5c8ee5 GM |
6974 | /* If these sizes are so big they cause overflow, just ignore the |
6975 | change. It's not clear what better we could do. */ | |
6976 | if (total_glyphs / sizeof (struct glyph) / height != width + 2) | |
1559a86d | 6977 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6978 | } |
6979 | ||
5f5c8ee5 | 6980 | adjust_frame_glyphs_initially (); |
91fb7e1b | 6981 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6982 | |
5f5c8ee5 GM |
6983 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ |
6984 | if (initialized | |
6985 | && !noninteractive | |
622dca89 EZ |
6986 | #ifdef MSDOS |
6987 | /* The MSDOS terminal turns on its ``window system'' relatively | |
6988 | late into the startup, so we cannot do the frame faces' | |
6989 | initialization just yet. It will be done later by pc-win.el | |
6990 | and internal_terminal_init. */ | |
6991 | && (strcmp (terminal_type, "internal") != 0 || inhibit_window_system) | |
6992 | #endif | |
2246281f | 6993 | && NILP (Vinitial_window_system)) |
2d764c78 EZ |
6994 | { |
6995 | /* For the initial frame, we don't have any way of knowing what | |
6996 | are the foreground and background colors of the terminal. */ | |
6997 | struct frame *sf = SELECTED_FRAME(); | |
6998 | ||
f9d2fdc4 EZ |
6999 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
7000 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
7001 | call0 (intern ("tty-set-up-initial-frame-faces")); |
7002 | } | |
5f5c8ee5 GM |
7003 | } |
7004 | ||
7005 | ||
7006 | \f | |
7007 | /*********************************************************************** | |
7008 | Blinking cursor | |
7009 | ***********************************************************************/ | |
7010 | ||
c3f13540 | 7011 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 7012 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 7013 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
7014 | WINDOW nil means use the selected window. SHOW non-nil means |
7015 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 MB |
7016 | don't show a cursor. */) |
7017 | (window, show) | |
5d7791b3 | 7018 | Lisp_Object window, show; |
5f5c8ee5 | 7019 | { |
5f5c8ee5 GM |
7020 | /* Don't change cursor state while redisplaying. This could confuse |
7021 | output routines. */ | |
7022 | if (!redisplaying_p) | |
7023 | { | |
7024 | if (NILP (window)) | |
7025 | window = selected_window; | |
7026 | else | |
b7826503 | 7027 | CHECK_WINDOW (window); |
177c0ea7 | 7028 | |
5d7791b3 | 7029 | XWINDOW (window)->cursor_off_p = NILP (show); |
5f5c8ee5 GM |
7030 | } |
7031 | ||
7032 | return Qnil; | |
4588ec20 | 7033 | } |
5f5c8ee5 GM |
7034 | |
7035 | ||
5d7791b3 GM |
7036 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
7037 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 7038 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 MB |
7039 | WINDOW nil or omitted means report on the selected window. */) |
7040 | (window) | |
5d7791b3 GM |
7041 | Lisp_Object window; |
7042 | { | |
7043 | struct window *w; | |
177c0ea7 | 7044 | |
5d7791b3 GM |
7045 | if (NILP (window)) |
7046 | window = selected_window; | |
7047 | else | |
b7826503 | 7048 | CHECK_WINDOW (window); |
177c0ea7 | 7049 | |
5d7791b3 | 7050 | w = XWINDOW (window); |
177c0ea7 | 7051 | return w->cursor_off_p ? Qnil : Qt; |
5d7791b3 GM |
7052 | } |
7053 | ||
4588ec20 | 7054 | \f |
5f5c8ee5 GM |
7055 | /*********************************************************************** |
7056 | Initialization | |
7057 | ***********************************************************************/ | |
7058 | ||
dfcf069d | 7059 | void |
4588ec20 JB |
7060 | syms_of_display () |
7061 | { | |
502b9b64 | 7062 | defsubr (&Sredraw_frame); |
4588ec20 | 7063 | defsubr (&Sredraw_display); |
078b3696 | 7064 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
7065 | defsubr (&Sopen_termscript); |
7066 | defsubr (&Sding); | |
7ba07a1a | 7067 | defsubr (&Sredisplay); |
4588ec20 JB |
7068 | defsubr (&Ssleep_for); |
7069 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 7070 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 7071 | defsubr (&Sinternal_show_cursor_p); |
4588ec20 | 7072 | |
2d5912c1 | 7073 | #if GLYPH_DEBUG |
9b0e97aa GM |
7074 | defsubr (&Sdump_redisplay_history); |
7075 | #endif | |
7076 | ||
d1dad759 | 7077 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
7078 | staticpro (&frame_and_buffer_state); |
7079 | ||
9cda4f7c RS |
7080 | Qdisplay_table = intern ("display-table"); |
7081 | staticpro (&Qdisplay_table); | |
e7067d00 GM |
7082 | Qredisplay_dont_pause = intern ("redisplay-dont-pause"); |
7083 | staticpro (&Qredisplay_dont_pause); | |
9cda4f7c | 7084 | |
7ee72033 | 7085 | DEFVAR_INT ("baud-rate", &baud_rate, |
bacf09b4 | 7086 | doc: /* *The output baud rate of the terminal. |
228299fa GM |
7087 | On most systems, changing this value will affect the amount of padding |
7088 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 7089 | |
7ee72033 | 7090 | DEFVAR_BOOL ("inverse-video", &inverse_video, |
bacf09b4 | 7091 | doc: /* *Non-nil means invert the entire frame display. |
228299fa | 7092 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 7093 | |
7ee72033 | 7094 | DEFVAR_BOOL ("visible-bell", &visible_bell, |
bacf09b4 | 7095 | doc: /* *Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
7096 | |
7097 | See also `ring-bell-function'. */); | |
177c0ea7 | 7098 | |
7ee72033 | 7099 | DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter, |
bacf09b4 | 7100 | doc: /* *Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
7101 | A non-nil value is useful if the terminal can automatically preserve |
7102 | Emacs's frame display when you reenter Emacs. | |
7103 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 7104 | |
2246281f KL |
7105 | DEFVAR_LISP ("initial-window-system", &Vinitial_window_system, |
7106 | doc: /* Name of the window system that Emacs uses for the first frame. | |
85565e9e RS |
7107 | The value is a symbol--for instance, `x' for X windows. |
7108 | The value is nil if Emacs is using a text-only terminal. */); | |
177c0ea7 | 7109 | |
70b8d0a4 SM |
7110 | DEFVAR_KBOARD ("window-system", Vwindow_system, |
7111 | doc: /* Name of window system through which the selected frame is displayed. | |
7112 | The value is a symbol--for instance, `x' for X windows. | |
7113 | The value is nil if the selected frame is on a text-only-terminal. */); | |
7114 | ||
7ee72033 | 7115 | DEFVAR_LISP ("window-system-version", &Vwindow_system_version, |
bacf09b4 | 7116 | doc: /* The version number of the window system in use. |
c22140f6 | 7117 | For X windows, this is 11. */); |
177c0ea7 | 7118 | |
7ee72033 | 7119 | DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area, |
bacf09b4 | 7120 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 7121 | |
7ee72033 | 7122 | DEFVAR_LISP ("glyph-table", &Vglyph_table, |
bacf09b4 | 7123 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
7124 | If not nil, this is a vector indexed by glyph code to define the glyph. |
7125 | Each element can be: | |
7126 | integer: a glyph code which this glyph is an alias for. | |
7127 | string: output this glyph using that string (not impl. in X windows). | |
7128 | nil: this glyph mod 524288 is the code of a character to output, | |
7129 | and this glyph / 524288 is the face number (see `face-id') to use | |
7130 | while outputting it. */); | |
4588ec20 JB |
7131 | Vglyph_table = Qnil; |
7132 | ||
7ee72033 | 7133 | DEFVAR_LISP ("standard-display-table", &Vstandard_display_table, |
bacf09b4 | 7134 | doc: /* Display table to use for buffers that specify none. |
228299fa | 7135 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
7136 | Vstandard_display_table = Qnil; |
7137 | ||
7ee72033 | 7138 | DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause, |
bacf09b4 | 7139 | doc: /* *Non-nil means update isn't paused when input is detected. */); |
5f5c8ee5 GM |
7140 | redisplay_dont_pause = 0; |
7141 | ||
d012c62b KS |
7142 | #if PERIODIC_PREEMPTION_CHECKING |
7143 | DEFVAR_LISP ("redisplay-preemption-period", &Vredisplay_preemption_period, | |
7144 | doc: /* *The period in seconds between checking for input during redisplay. | |
7145 | If input is detected, redisplay is pre-empted, and the input is processed. | |
7146 | If nil, never pre-empt redisplay. */); | |
7147 | Vredisplay_preemption_period = make_float (0.10); | |
7148 | #endif | |
7149 | ||
4588ec20 JB |
7150 | #ifdef CANNOT_DUMP |
7151 | if (noninteractive) | |
7152 | #endif | |
7153 | { | |
2246281f | 7154 | Vinitial_window_system = Qnil; |
4588ec20 JB |
7155 | Vwindow_system_version = Qnil; |
7156 | } | |
7157 | } | |
ab5796a9 MB |
7158 | |
7159 | /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413 | |
7160 | (do not change this comment) */ |