Commit | Line | Data |
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4588ec20 | 1 | /* Updating of data structures for redisplay. |
0b5538bd TTN |
2 | Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, |
3 | 1997, 1998, 1999, 2000, 2001, 2002, 2003, | |
5df4f04c | 4 | 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. |
4588ec20 JB |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
9ec0b715 | 8 | GNU Emacs is free software: you can redistribute it and/or modify |
4588ec20 | 9 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
10 | the Free Software Foundation, either version 3 of the License, or |
11 | (at your option) any later version. | |
4588ec20 JB |
12 | |
13 | GNU Emacs is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
4588ec20 | 20 | |
18160b98 | 21 | #include <config.h> |
68c45bf0 | 22 | #include <signal.h> |
565620a5 | 23 | #include <stdio.h> |
4588ec20 | 24 | #include <ctype.h> |
d7306fe6 | 25 | #include <setjmp.h> |
dfcf069d | 26 | #include <unistd.h> |
dfcf069d | 27 | |
47099d6f | 28 | #include "lisp.h" |
4588ec20 JB |
29 | #include "termchar.h" |
30 | #include "termopts.h" | |
a0879520 | 31 | /* cm.h must come after dispextern.h on Windows. */ |
fd2e066a GV |
32 | #include "dispextern.h" |
33 | #include "cm.h" | |
4588ec20 | 34 | #include "buffer.h" |
83be827a | 35 | #include "character.h" |
d43721a2 | 36 | #include "keyboard.h" |
502b9b64 | 37 | #include "frame.h" |
428a555e | 38 | #include "termhooks.h" |
4588ec20 JB |
39 | #include "window.h" |
40 | #include "commands.h" | |
41 | #include "disptab.h" | |
42 | #include "indent.h" | |
d169fe39 | 43 | #include "intervals.h" |
97cf50e7 | 44 | #include "blockinput.h" |
dfcf069d | 45 | #include "process.h" |
4588ec20 | 46 | |
58b2bb63 | 47 | #include "syssignal.h" |
a41f8bed | 48 | |
4588ec20 JB |
49 | #ifdef HAVE_X_WINDOWS |
50 | #include "xterm.h" | |
5f5c8ee5 | 51 | #endif /* HAVE_X_WINDOWS */ |
4588ec20 | 52 | |
fd2e066a GV |
53 | #ifdef HAVE_NTGUI |
54 | #include "w32term.h" | |
55 | #endif /* HAVE_NTGUI */ | |
56 | ||
edfda783 AR |
57 | #ifdef HAVE_NS |
58 | #include "nsterm.h" | |
59 | #endif | |
60 | ||
5f5c8ee5 | 61 | /* Include systime.h after xterm.h to avoid double inclusion of time.h. */ |
6cbd1643 | 62 | |
5f5c8ee5 | 63 | #include "systime.h" |
3883a901 RS |
64 | #include <errno.h> |
65 | ||
4588ec20 | 66 | /* Get number of chars of output now in the buffer of a stdio stream. |
5f5c8ee5 GM |
67 | This ought to be built in in stdio, but it isn't. Some s- files |
68 | override this because their stdio internals differ. */ | |
69 | ||
e3271ae5 | 70 | #ifdef __GNU_LIBRARY__ |
5f5c8ee5 GM |
71 | |
72 | /* The s- file might have overridden the definition with one that | |
73 | works for the system's C library. But we are using the GNU C | |
74 | library, so this is the right definition for every system. */ | |
75 | ||
3883a901 RS |
76 | #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT |
77 | #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT | |
78 | #else | |
cb5558ff | 79 | #undef PENDING_OUTPUT_COUNT |
e3271ae5 | 80 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer) |
3883a901 RS |
81 | #endif |
82 | #else /* not __GNU_LIBRARY__ */ | |
68c45bf0 PE |
83 | #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING |
84 | #include <stdio_ext.h> | |
85 | #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE) | |
86 | #endif | |
cb5558ff | 87 | #ifndef PENDING_OUTPUT_COUNT |
4588ec20 JB |
88 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) |
89 | #endif | |
5f5c8ee5 GM |
90 | #endif /* not __GNU_LIBRARY__ */ |
91 | ||
8a2a6032 | 92 | #if defined(HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES) |
fa0ec9f4 DL |
93 | #include <term.h> /* for tgetent */ |
94 | #endif | |
5f5c8ee5 GM |
95 | \f |
96 | /* Structure to pass dimensions around. Used for character bounding | |
97 | boxes, glyph matrix dimensions and alike. */ | |
98 | ||
99 | struct dim | |
100 | { | |
101 | int width; | |
102 | int height; | |
103 | }; | |
104 | ||
105 | \f | |
106 | /* Function prototypes. */ | |
107 | ||
f57e2426 J |
108 | static struct glyph_matrix *save_current_matrix (struct frame *); |
109 | static void restore_current_matrix (struct frame *, struct glyph_matrix *); | |
110 | static int showing_window_margins_p (struct window *); | |
111 | static void fake_current_matrices (Lisp_Object); | |
112 | static void redraw_overlapping_rows (struct window *, int); | |
113 | static void redraw_overlapped_rows (struct window *, int); | |
114 | static int count_blanks (struct glyph *, int); | |
115 | static int count_match (struct glyph *, struct glyph *, | |
116 | struct glyph *, struct glyph *); | |
117 | static unsigned line_draw_cost (struct glyph_matrix *, int); | |
118 | static void update_frame_line (struct frame *, int); | |
5f5c8ee5 | 119 | static struct dim allocate_matrices_for_frame_redisplay |
f57e2426 | 120 | (Lisp_Object, int, int, int, int *); |
2f7c71a1 AS |
121 | static int required_matrix_height (struct window *); |
122 | static int required_matrix_width (struct window *); | |
f57e2426 J |
123 | static void allocate_matrices_for_window_redisplay (struct window *); |
124 | static int realloc_glyph_pool (struct glyph_pool *, struct dim); | |
125 | static void adjust_frame_glyphs (struct frame *); | |
126 | struct glyph_matrix *new_glyph_matrix (struct glyph_pool *); | |
127 | static void free_glyph_matrix (struct glyph_matrix *); | |
128 | static void adjust_glyph_matrix (struct window *, struct glyph_matrix *, | |
129 | int, int, struct dim); | |
130 | static void change_frame_size_1 (struct frame *, int, int, int, int, int); | |
131 | static void swap_glyph_pointers (struct glyph_row *, struct glyph_row *); | |
f1d2ce7f | 132 | #if GLYPH_DEBUG |
f57e2426 | 133 | static int glyph_row_slice_p (struct glyph_row *, struct glyph_row *); |
9339e87f | 134 | #endif |
f57e2426 J |
135 | static void fill_up_frame_row_with_spaces (struct glyph_row *, int); |
136 | static void build_frame_matrix_from_window_tree (struct glyph_matrix *, | |
137 | struct window *); | |
138 | static void build_frame_matrix_from_leaf_window (struct glyph_matrix *, | |
139 | struct window *); | |
140 | static struct glyph_pool *new_glyph_pool (void); | |
141 | static void free_glyph_pool (struct glyph_pool *); | |
142 | static void adjust_frame_glyphs_initially (void); | |
143 | static void adjust_frame_message_buffer (struct frame *); | |
144 | static void adjust_decode_mode_spec_buffer (struct frame *); | |
145 | static void fill_up_glyph_row_with_spaces (struct glyph_row *); | |
146 | static void build_frame_matrix (struct frame *); | |
147 | void clear_current_matrices (struct frame *); | |
148 | void scroll_glyph_matrix_range (struct glyph_matrix *, int, int, | |
149 | int, int); | |
150 | static void clear_window_matrices (struct window *, int); | |
151 | static void fill_up_glyph_row_area_with_spaces (struct glyph_row *, int); | |
152 | static int scrolling_window (struct window *, int); | |
153 | static int update_window_line (struct window *, int, int *); | |
154 | static void update_marginal_area (struct window *, int, int); | |
155 | static int update_text_area (struct window *, int); | |
156 | static void make_current (struct glyph_matrix *, struct glyph_matrix *, | |
157 | int); | |
158 | static void mirror_make_current (struct window *, int); | |
159 | void check_window_matrix_pointers (struct window *); | |
b96fd3e8 | 160 | #if GLYPH_DEBUG |
f57e2426 J |
161 | static void check_matrix_pointers (struct glyph_matrix *, |
162 | struct glyph_matrix *); | |
b96fd3e8 | 163 | #endif |
f57e2426 J |
164 | static void mirror_line_dance (struct window *, int, int, int *, char *); |
165 | static int update_window_tree (struct window *, int); | |
166 | static int update_window (struct window *, int); | |
167 | static int update_frame_1 (struct frame *, int, int); | |
168 | static void set_window_cursor_after_update (struct window *); | |
f57e2426 J |
169 | static void adjust_frame_glyphs_for_window_redisplay (struct frame *); |
170 | static void adjust_frame_glyphs_for_frame_redisplay (struct frame *); | |
5f5c8ee5 | 171 | |
5f5c8ee5 | 172 | \f |
d012c62b KS |
173 | /* Define PERIODIC_PREEMPTION_CHECKING to 1, if micro-second timers |
174 | are supported, so we can check for input during redisplay at | |
175 | regular intervals. */ | |
176 | #ifdef EMACS_HAS_USECS | |
177 | #define PERIODIC_PREEMPTION_CHECKING 1 | |
178 | #else | |
179 | #define PERIODIC_PREEMPTION_CHECKING 0 | |
180 | #endif | |
181 | ||
182 | #if PERIODIC_PREEMPTION_CHECKING | |
183 | ||
d012c62b KS |
184 | /* Redisplay preemption timers. */ |
185 | ||
186 | static EMACS_TIME preemption_period; | |
187 | static EMACS_TIME preemption_next_check; | |
188 | ||
189 | #endif | |
190 | ||
a41f8bed | 191 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 192 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 193 | |
502b9b64 | 194 | int frame_garbaged; |
4588ec20 | 195 | |
5f5c8ee5 | 196 | /* Nonzero means last display completed. Zero means it was preempted. */ |
4588ec20 JB |
197 | |
198 | int display_completed; | |
199 | ||
e7067d00 | 200 | Lisp_Object Qdisplay_table, Qredisplay_dont_pause; |
5f5c8ee5 | 201 | |
4588ec20 | 202 | \f |
5f5c8ee5 | 203 | /* The currently selected frame. In a single-frame version, this |
91fb7e1b | 204 | variable always equals the_only_frame. */ |
4588ec20 | 205 | |
91fb7e1b | 206 | Lisp_Object selected_frame; |
4588ec20 | 207 | |
5f5c8ee5 | 208 | /* A frame which is not just a mini-buffer, or 0 if there are no such |
502b9b64 | 209 | frames. This is usually the most recent such frame that was |
87485d6f MW |
210 | selected. In a single-frame version, this variable always holds |
211 | the address of the_only_frame. */ | |
4588ec20 | 212 | |
5f5c8ee5 | 213 | struct frame *last_nonminibuf_frame; |
d52bad65 | 214 | |
5f5c8ee5 | 215 | /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 216 | |
5f5c8ee5 | 217 | int delayed_size_change; |
4588ec20 | 218 | |
5f5c8ee5 | 219 | /* 1 means glyph initialization has been completed at startup. */ |
4588ec20 | 220 | |
5f5c8ee5 | 221 | static int glyphs_initialized_initially_p; |
4588ec20 | 222 | |
5f5c8ee5 | 223 | /* Updated window if != 0. Set by update_window. */ |
4588ec20 | 224 | |
5f5c8ee5 | 225 | struct window *updated_window; |
4588ec20 | 226 | |
5f5c8ee5 | 227 | /* Glyph row updated in update_window_line, and area that is updated. */ |
4588ec20 | 228 | |
5f5c8ee5 GM |
229 | struct glyph_row *updated_row; |
230 | int updated_area; | |
4588ec20 | 231 | |
5f5c8ee5 | 232 | /* A glyph for a space. */ |
4588ec20 | 233 | |
5f5c8ee5 | 234 | struct glyph space_glyph; |
4588ec20 | 235 | |
5f5c8ee5 GM |
236 | /* Counts of allocated structures. These counts serve to diagnose |
237 | memory leaks and double frees. */ | |
4588ec20 | 238 | |
5f5c8ee5 GM |
239 | int glyph_matrix_count; |
240 | int glyph_pool_count; | |
4588ec20 | 241 | |
5f5c8ee5 GM |
242 | /* If non-null, the frame whose frame matrices are manipulated. If |
243 | null, window matrices are worked on. */ | |
4588ec20 | 244 | |
5f5c8ee5 | 245 | static struct frame *frame_matrix_frame; |
4588ec20 | 246 | |
5f5c8ee5 GM |
247 | /* Non-zero means that fonts have been loaded since the last glyph |
248 | matrix adjustments. Redisplay must stop, and glyph matrices must | |
249 | be adjusted when this flag becomes non-zero during display. The | |
250 | reason fonts can be loaded so late is that fonts of fontsets are | |
3aa9f0c4 KH |
251 | loaded on demand. Another reason is that a line contains many |
252 | characters displayed by zero width or very narrow glyphs of | |
253 | variable-width fonts. */ | |
836d2cde | 254 | |
5f5c8ee5 | 255 | int fonts_changed_p; |
836d2cde | 256 | |
177c0ea7 | 257 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 258 | This may only be used for terminal frames. */ |
836d2cde | 259 | |
5f5c8ee5 | 260 | #if GLYPH_DEBUG |
4588ec20 | 261 | |
f57e2426 J |
262 | static int window_to_frame_vpos (struct window *, int); |
263 | static int window_to_frame_hpos (struct window *, int); | |
5f5c8ee5 GM |
264 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) |
265 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 266 | |
9b0e97aa GM |
267 | /* One element of the ring buffer containing redisplay history |
268 | information. */ | |
269 | ||
270 | struct redisplay_history | |
271 | { | |
272 | char trace[512 + 100]; | |
273 | }; | |
274 | ||
275 | /* The size of the history buffer. */ | |
276 | ||
277 | #define REDISPLAY_HISTORY_SIZE 30 | |
278 | ||
279 | /* The redisplay history buffer. */ | |
280 | ||
281 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
282 | ||
283 | /* Next free entry in redisplay_history. */ | |
284 | ||
285 | static int history_idx; | |
286 | ||
287 | /* A tick that's incremented each time something is added to the | |
288 | history. */ | |
289 | ||
290 | static unsigned history_tick; | |
291 | ||
f57e2426 J |
292 | static void add_frame_display_history (struct frame *, int); |
293 | static void add_window_display_history (struct window *, char *, int); | |
6a8aec41 | 294 | \f |
9b0e97aa GM |
295 | /* Add to the redisplay history how window W has been displayed. |
296 | MSG is a trace containing the information how W's glyph matrix | |
153a073c | 297 | has been constructed. PAUSED_P non-zero means that the update |
9b0e97aa GM |
298 | has been interrupted for pending input. */ |
299 | ||
300 | static void | |
59fc5cf9 | 301 | add_window_display_history (struct window *w, char *msg, int paused_p) |
9b0e97aa GM |
302 | { |
303 | char *buf; | |
177c0ea7 | 304 | |
9b0e97aa GM |
305 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
306 | history_idx = 0; | |
307 | buf = redisplay_history[history_idx].trace; | |
308 | ++history_idx; | |
177c0ea7 | 309 | |
9b0e97aa GM |
310 | sprintf (buf, "%d: window %p (`%s')%s\n", |
311 | history_tick++, | |
312 | w, | |
313 | ((BUFFERP (w->buffer) | |
314 | && STRINGP (XBUFFER (w->buffer)->name)) | |
51b59d79 | 315 | ? SSDATA (XBUFFER (w->buffer)->name) |
9b0e97aa GM |
316 | : "???"), |
317 | paused_p ? " ***paused***" : ""); | |
318 | strcat (buf, msg); | |
319 | } | |
320 | ||
321 | ||
322 | /* Add to the redisplay history that frame F has been displayed. | |
323 | PAUSED_P non-zero means that the update has been interrupted for | |
324 | pending input. */ | |
325 | ||
326 | static void | |
59fc5cf9 | 327 | add_frame_display_history (struct frame *f, int paused_p) |
9b0e97aa GM |
328 | { |
329 | char *buf; | |
177c0ea7 | 330 | |
9b0e97aa GM |
331 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
332 | history_idx = 0; | |
333 | buf = redisplay_history[history_idx].trace; | |
334 | ++history_idx; | |
177c0ea7 | 335 | |
9b0e97aa GM |
336 | sprintf (buf, "%d: update frame %p%s", |
337 | history_tick++, | |
338 | f, paused_p ? " ***paused***" : ""); | |
339 | } | |
340 | ||
341 | ||
342 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, | |
343 | Sdump_redisplay_history, 0, 0, "", | |
7ee72033 | 344 | doc: /* Dump redisplay history to stderr. */) |
5842a27b | 345 | (void) |
9b0e97aa GM |
346 | { |
347 | int i; | |
348 | ||
349 | for (i = history_idx - 1; i != history_idx; --i) | |
350 | { | |
351 | if (i < 0) | |
352 | i = REDISPLAY_HISTORY_SIZE - 1; | |
353 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
354 | } | |
355 | ||
356 | return Qnil; | |
357 | } | |
358 | ||
359 | ||
5f5c8ee5 | 360 | #else /* GLYPH_DEBUG == 0 */ |
4588ec20 | 361 | |
7df02016 KS |
362 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
363 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 364 | |
5f5c8ee5 | 365 | #endif /* GLYPH_DEBUG == 0 */ |
4588ec20 | 366 | |
4588ec20 | 367 | |
dcc19aac | 368 | #if defined PROFILING && !HAVE___EXECUTABLE_START |
72af86bd | 369 | /* FIXME: only used to find text start for profiling. */ |
4588ec20 JB |
370 | |
371 | void | |
971de7fb | 372 | safe_bcopy (const char *from, char *to, int size) |
4588ec20 | 373 | { |
72af86bd | 374 | abort (); |
177c0ea7 | 375 | } |
72af86bd | 376 | #endif |
5f5c8ee5 GM |
377 | \f |
378 | /*********************************************************************** | |
379 | Glyph Matrices | |
380 | ***********************************************************************/ | |
381 | ||
382 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
383 | pool from which memory for the matrix should be allocated, or null | |
384 | for window-based redisplay where no glyph pools are used. The | |
385 | member `pool' of the glyph matrix structure returned is set to | |
386 | POOL, the structure is otherwise zeroed. */ | |
387 | ||
388 | struct glyph_matrix * | |
971de7fb | 389 | new_glyph_matrix (struct glyph_pool *pool) |
4588ec20 | 390 | { |
5f5c8ee5 GM |
391 | struct glyph_matrix *result; |
392 | ||
393 | /* Allocate and clear. */ | |
394 | result = (struct glyph_matrix *) xmalloc (sizeof *result); | |
72af86bd | 395 | memset (result, 0, sizeof *result); |
4588ec20 | 396 | |
5f5c8ee5 GM |
397 | /* Increment number of allocated matrices. This count is used |
398 | to detect memory leaks. */ | |
399 | ++glyph_matrix_count; | |
4588ec20 | 400 | |
5f5c8ee5 GM |
401 | /* Set pool and return. */ |
402 | result->pool = pool; | |
403 | return result; | |
4588ec20 JB |
404 | } |
405 | ||
4588ec20 | 406 | |
5f5c8ee5 GM |
407 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
408 | ||
409 | The global counter glyph_matrix_count is decremented when a matrix | |
410 | is freed. If the count gets negative, more structures were freed | |
411 | than allocated, i.e. one matrix was freed more than once or a bogus | |
412 | pointer was passed to this function. | |
177c0ea7 | 413 | |
5f5c8ee5 GM |
414 | If MATRIX->pool is null, this means that the matrix manages its own |
415 | glyph memory---this is done for matrices on X frames. Freeing the | |
416 | matrix also frees the glyph memory in this case. */ | |
417 | ||
418 | static void | |
971de7fb | 419 | free_glyph_matrix (struct glyph_matrix *matrix) |
4588ec20 | 420 | { |
5f5c8ee5 GM |
421 | if (matrix) |
422 | { | |
423 | int i; | |
424 | ||
425 | /* Detect the case that more matrices are freed than were | |
426 | allocated. */ | |
427 | if (--glyph_matrix_count < 0) | |
428 | abort (); | |
429 | ||
430 | /* Free glyph memory if MATRIX owns it. */ | |
431 | if (matrix->pool == NULL) | |
432 | for (i = 0; i < matrix->rows_allocated; ++i) | |
433 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 434 | |
5f5c8ee5 GM |
435 | /* Free row structures and the matrix itself. */ |
436 | xfree (matrix->rows); | |
437 | xfree (matrix); | |
438 | } | |
439 | } | |
4588ec20 | 440 | |
4588ec20 | 441 | |
5f5c8ee5 GM |
442 | /* Return the number of glyphs to reserve for a marginal area of |
443 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
444 | display line of window W. MARGIN gives the width of the marginal | |
445 | area in canonical character units. MARGIN should be an integer | |
446 | or a float. */ | |
447 | ||
448 | static int | |
971de7fb | 449 | margin_glyphs_to_reserve (struct window *w, int total_glyphs, Lisp_Object margin) |
5f5c8ee5 GM |
450 | { |
451 | int n; | |
4588ec20 | 452 | |
5f5c8ee5 | 453 | if (NUMBERP (margin)) |
4588ec20 | 454 | { |
7df02016 | 455 | int width = XFASTINT (w->total_cols); |
5f5c8ee5 GM |
456 | double d = max (0, XFLOATINT (margin)); |
457 | d = min (width / 2 - 1, d); | |
35ec832e | 458 | n = (int) ((double) total_glyphs / width * d); |
5f5c8ee5 GM |
459 | } |
460 | else | |
461 | n = 0; | |
462 | ||
463 | return n; | |
464 | } | |
465 | ||
4588ec20 | 466 | |
5f5c8ee5 GM |
467 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
468 | window sizes. | |
4588ec20 | 469 | |
5f5c8ee5 GM |
470 | W is null if the function is called for a frame glyph matrix. |
471 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
472 | indices of the first column and row of MATRIX within the frame | |
473 | matrix, if such a matrix exists. They are zero for purely | |
474 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 475 | |
5f5c8ee5 GM |
476 | In window-based redisplay, where no frame matrices exist, glyph |
477 | matrices manage their own glyph storage. Otherwise, they allocate | |
478 | storage from a common frame glyph pool which can be found in | |
479 | MATRIX->pool. | |
23b0200c | 480 | |
5f5c8ee5 GM |
481 | The reason for this memory management strategy is to avoid complete |
482 | frame redraws if possible. When we allocate from a common pool, a | |
483 | change of the location or size of a sub-matrix within the pool | |
484 | requires a complete redisplay of the frame because we cannot easily | |
485 | make sure that the current matrices of all windows still agree with | |
486 | what is displayed on the screen. While this is usually fast, it | |
487 | leads to screen flickering. */ | |
23b0200c | 488 | |
5f5c8ee5 | 489 | static void |
971de7fb | 490 | adjust_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int x, int y, struct dim dim) |
5f5c8ee5 GM |
491 | { |
492 | int i; | |
493 | int new_rows; | |
494 | int marginal_areas_changed_p = 0; | |
045dee35 GM |
495 | int header_line_changed_p = 0; |
496 | int header_line_p = 0; | |
5f5c8ee5 | 497 | int left = -1, right = -1; |
ca8a12a7 | 498 | int window_width = -1, window_height = -1; |
5f5c8ee5 | 499 | |
6b61353c KH |
500 | /* See if W had a header line that has disappeared now, or vice versa. |
501 | Get W's size. */ | |
5f5c8ee5 GM |
502 | if (w) |
503 | { | |
6b61353c KH |
504 | window_box (w, -1, 0, 0, &window_width, &window_height); |
505 | ||
045dee35 GM |
506 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
507 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 508 | } |
045dee35 | 509 | matrix->header_line_p = header_line_p; |
23b0200c | 510 | |
6b61353c KH |
511 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
512 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
513 | haven't changed. This optimization is important because preserving |
514 | the matrix means preventing redisplay. */ | |
515 | if (matrix->pool == NULL) | |
516 | { | |
7df02016 KS |
517 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
518 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
5f5c8ee5 GM |
519 | xassert (left >= 0 && right >= 0); |
520 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs | |
521 | || right != matrix->right_margin_glyphs); | |
522 | ||
523 | if (!marginal_areas_changed_p | |
524 | && !fonts_changed_p | |
045dee35 | 525 | && !header_line_changed_p |
7df02016 KS |
526 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
527 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
528 | && matrix->window_height == window_height |
529 | && matrix->window_vscroll == w->vscroll | |
530 | && matrix->window_width == window_width) | |
531 | return; | |
532 | } | |
177c0ea7 | 533 | |
5f5c8ee5 GM |
534 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
535 | if (matrix->rows_allocated < dim.height) | |
536 | { | |
537 | int size = dim.height * sizeof (struct glyph_row); | |
538 | new_rows = dim.height - matrix->rows_allocated; | |
539 | matrix->rows = (struct glyph_row *) xrealloc (matrix->rows, size); | |
72af86bd AS |
540 | memset (matrix->rows + matrix->rows_allocated, 0, |
541 | new_rows * sizeof *matrix->rows); | |
5f5c8ee5 GM |
542 | matrix->rows_allocated = dim.height; |
543 | } | |
544 | else | |
545 | new_rows = 0; | |
60a8948a | 546 | |
5f5c8ee5 GM |
547 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
548 | on a frame not using window-based redisplay. Set up pointers for | |
549 | each row into the glyph pool. */ | |
550 | if (matrix->pool) | |
551 | { | |
552 | xassert (matrix->pool->glyphs); | |
177c0ea7 | 553 | |
5f5c8ee5 | 554 | if (w) |
60a8948a | 555 | { |
5f5c8ee5 | 556 | left = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 557 | w->left_margin_cols); |
5f5c8ee5 | 558 | right = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 559 | w->right_margin_cols); |
60a8948a | 560 | } |
5f5c8ee5 GM |
561 | else |
562 | left = right = 0; | |
177c0ea7 | 563 | |
5f5c8ee5 | 564 | for (i = 0; i < dim.height; ++i) |
60a8948a | 565 | { |
5f5c8ee5 | 566 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
567 | |
568 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
569 | = (matrix->pool->glyphs |
570 | + (y + i) * matrix->pool->ncolumns | |
571 | + x); | |
177c0ea7 | 572 | |
5f5c8ee5 GM |
573 | if (w == NULL |
574 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 575 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
576 | { |
577 | row->glyphs[TEXT_AREA] | |
578 | = row->glyphs[LEFT_MARGIN_AREA]; | |
579 | row->glyphs[RIGHT_MARGIN_AREA] | |
580 | = row->glyphs[TEXT_AREA] + dim.width; | |
581 | row->glyphs[LAST_AREA] | |
582 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
583 | } | |
584 | else | |
585 | { | |
586 | row->glyphs[TEXT_AREA] | |
587 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
588 | row->glyphs[RIGHT_MARGIN_AREA] | |
589 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
590 | row->glyphs[LAST_AREA] | |
591 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
592 | } | |
60a8948a | 593 | } |
177c0ea7 | 594 | |
5f5c8ee5 GM |
595 | matrix->left_margin_glyphs = left; |
596 | matrix->right_margin_glyphs = right; | |
597 | } | |
598 | else | |
599 | { | |
600 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
6b61353c KH |
601 | its own memory. It is a window matrix for window-based redisplay. |
602 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
603 | if (dim.width > matrix->matrix_w |
604 | || new_rows | |
045dee35 | 605 | || header_line_changed_p |
5f5c8ee5 | 606 | || marginal_areas_changed_p) |
4588ec20 | 607 | { |
5f5c8ee5 GM |
608 | struct glyph_row *row = matrix->rows; |
609 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 610 | |
5f5c8ee5 GM |
611 | while (row < end) |
612 | { | |
613 | row->glyphs[LEFT_MARGIN_AREA] | |
614 | = (struct glyph *) xrealloc (row->glyphs[LEFT_MARGIN_AREA], | |
615 | (dim.width | |
616 | * sizeof (struct glyph))); | |
177c0ea7 | 617 | |
5f5c8ee5 GM |
618 | /* The mode line never has marginal areas. */ |
619 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 620 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
621 | { |
622 | row->glyphs[TEXT_AREA] | |
623 | = row->glyphs[LEFT_MARGIN_AREA]; | |
624 | row->glyphs[RIGHT_MARGIN_AREA] | |
625 | = row->glyphs[TEXT_AREA] + dim.width; | |
626 | row->glyphs[LAST_AREA] | |
627 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
628 | } | |
629 | else | |
630 | { | |
631 | row->glyphs[TEXT_AREA] | |
632 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
633 | row->glyphs[RIGHT_MARGIN_AREA] | |
634 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
635 | row->glyphs[LAST_AREA] | |
636 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
637 | } | |
638 | ++row; | |
639 | } | |
4588ec20 JB |
640 | } |
641 | ||
5f5c8ee5 GM |
642 | xassert (left >= 0 && right >= 0); |
643 | matrix->left_margin_glyphs = left; | |
644 | matrix->right_margin_glyphs = right; | |
645 | } | |
177c0ea7 | 646 | |
5f5c8ee5 GM |
647 | /* Number of rows to be used by MATRIX. */ |
648 | matrix->nrows = dim.height; | |
3ed36514 | 649 | xassert (matrix->nrows >= 0); |
5f5c8ee5 | 650 | |
b7b20fbd | 651 | if (w) |
5f5c8ee5 | 652 | { |
b7b20fbd | 653 | if (matrix == w->current_matrix) |
4588ec20 | 654 | { |
b7b20fbd GM |
655 | /* Mark rows in a current matrix of a window as not having |
656 | valid contents. It's important to not do this for | |
657 | desired matrices. When Emacs starts, it may already be | |
658 | building desired matrices when this function runs. */ | |
659 | if (window_width < 0) | |
660 | window_width = window_box_width (w, -1); | |
177c0ea7 | 661 | |
b7b20fbd GM |
662 | /* Optimize the case that only the height has changed (C-x 2, |
663 | upper window). Invalidate all rows that are no longer part | |
664 | of the window. */ | |
665 | if (!marginal_areas_changed_p | |
73d75a62 GM |
666 | && !header_line_changed_p |
667 | && new_rows == 0 | |
668 | && dim.width == matrix->matrix_w | |
7df02016 KS |
669 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
670 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 671 | && matrix->window_width == window_width) |
b7b20fbd | 672 | { |
dd42b31a GM |
673 | /* Find the last row in the window. */ |
674 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
675 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
676 | { | |
26447967 | 677 | ++i; |
dd42b31a GM |
678 | break; |
679 | } | |
b7b20fbd GM |
680 | |
681 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 682 | are invalidated below. */ |
b7b20fbd GM |
683 | if (INTEGERP (w->window_end_vpos) |
684 | && XFASTINT (w->window_end_vpos) >= i) | |
685 | w->window_end_valid = Qnil; | |
177c0ea7 | 686 | |
b7b20fbd GM |
687 | while (i < matrix->nrows) |
688 | matrix->rows[i++].enabled_p = 0; | |
689 | } | |
690 | else | |
691 | { | |
692 | for (i = 0; i < matrix->nrows; ++i) | |
693 | matrix->rows[i].enabled_p = 0; | |
694 | } | |
5f5c8ee5 | 695 | } |
b7b20fbd | 696 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 697 | { |
b7b20fbd GM |
698 | /* Rows in desired matrices always have to be cleared; |
699 | redisplay expects this is the case when it runs, so it | |
700 | had better be the case when we adjust matrices between | |
701 | redisplays. */ | |
5f5c8ee5 GM |
702 | for (i = 0; i < matrix->nrows; ++i) |
703 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 704 | } |
4588ec20 | 705 | } |
177c0ea7 JB |
706 | |
707 | ||
5f5c8ee5 GM |
708 | /* Remember last values to be able to optimize frame redraws. */ |
709 | matrix->matrix_x = x; | |
710 | matrix->matrix_y = y; | |
711 | matrix->matrix_w = dim.width; | |
712 | matrix->matrix_h = dim.height; | |
713 | ||
714 | /* Record the top y location and height of W at the time the matrix | |
715 | was last adjusted. This is used to optimize redisplay above. */ | |
716 | if (w) | |
4588ec20 | 717 | { |
7df02016 KS |
718 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
719 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
720 | matrix->window_height = window_height; |
721 | matrix->window_width = window_width; | |
722 | matrix->window_vscroll = w->vscroll; | |
723 | } | |
724 | } | |
4588ec20 | 725 | |
4588ec20 | 726 | |
5f5c8ee5 GM |
727 | /* Reverse the contents of rows in MATRIX between START and END. The |
728 | contents of the row at END - 1 end up at START, END - 2 at START + | |
729 | 1 etc. This is part of the implementation of rotate_matrix (see | |
730 | below). */ | |
d52bad65 | 731 | |
5f5c8ee5 | 732 | static void |
971de7fb | 733 | reverse_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 GM |
734 | { |
735 | int i, j; | |
23b0200c | 736 | |
5f5c8ee5 GM |
737 | for (i = start, j = end - 1; i < j; ++i, --j) |
738 | { | |
739 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
740 | initialization. */ | |
741 | struct glyph_row temp; | |
742 | temp = matrix->rows[i]; | |
743 | matrix->rows[i] = matrix->rows[j]; | |
744 | matrix->rows[j] = temp; | |
745 | } | |
746 | } | |
23b0200c | 747 | |
23b0200c | 748 | |
5f5c8ee5 GM |
749 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
750 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
751 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
752 | row structures are moved around). | |
60a8948a | 753 | |
5f5c8ee5 GM |
754 | The algorithm used for rotating the vector was, I believe, first |
755 | described by Kernighan. See the vector R as consisting of two | |
756 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
757 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
758 | and reverse the result to get (ArBr)r which is BA. Similar for | |
759 | rotating right. */ | |
760 | ||
761 | void | |
971de7fb | 762 | rotate_matrix (struct glyph_matrix *matrix, int first, int last, int by) |
5f5c8ee5 GM |
763 | { |
764 | if (by < 0) | |
765 | { | |
766 | /* Up (rotate left, i.e. towards lower indices). */ | |
767 | by = -by; | |
768 | reverse_rows (matrix, first, first + by); | |
769 | reverse_rows (matrix, first + by, last); | |
770 | reverse_rows (matrix, first, last); | |
771 | } | |
772 | else if (by > 0) | |
773 | { | |
774 | /* Down (rotate right, i.e. towards higher indices). */ | |
775 | reverse_rows (matrix, last - by, last); | |
776 | reverse_rows (matrix, first, last - by); | |
777 | reverse_rows (matrix, first, last); | |
778 | } | |
779 | } | |
780 | ||
781 | ||
782 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
783 | with indices START <= index < END. Increment positions by DELTA/ | |
784 | DELTA_BYTES. */ | |
785 | ||
786 | void | |
ace1712c EZ |
787 | increment_matrix_positions (struct glyph_matrix *matrix, int start, int end, |
788 | EMACS_INT delta, EMACS_INT delta_bytes) | |
5f5c8ee5 GM |
789 | { |
790 | /* Check that START and END are reasonable values. */ | |
791 | xassert (start >= 0 && start <= matrix->nrows); | |
792 | xassert (end >= 0 && end <= matrix->nrows); | |
793 | xassert (start <= end); | |
794 | ||
795 | for (; start < end; ++start) | |
86c11ba1 | 796 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
797 | } |
798 | ||
799 | ||
800 | /* Enable a range of rows in glyph matrix MATRIX. START and END are | |
801 | the row indices of the first and last + 1 row to enable. If | |
802 | ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */ | |
803 | ||
804 | void | |
971de7fb | 805 | enable_glyph_matrix_rows (struct glyph_matrix *matrix, int start, int end, int enabled_p) |
5f5c8ee5 | 806 | { |
3ed36514 GM |
807 | xassert (start <= end); |
808 | xassert (start >= 0 && start < matrix->nrows); | |
809 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 810 | |
5f5c8ee5 GM |
811 | for (; start < end; ++start) |
812 | matrix->rows[start].enabled_p = enabled_p != 0; | |
813 | } | |
814 | ||
815 | ||
816 | /* Clear MATRIX. | |
817 | ||
818 | This empties all rows in MATRIX by setting the enabled_p flag for | |
819 | all rows of the matrix to zero. The function prepare_desired_row | |
820 | will eventually really clear a row when it sees one with a zero | |
821 | enabled_p flag. | |
822 | ||
823 | Resets update hints to defaults value. The only update hint | |
824 | currently present is the flag MATRIX->no_scrolling_p. */ | |
825 | ||
826 | void | |
971de7fb | 827 | clear_glyph_matrix (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
828 | { |
829 | if (matrix) | |
830 | { | |
831 | enable_glyph_matrix_rows (matrix, 0, matrix->nrows, 0); | |
832 | matrix->no_scrolling_p = 0; | |
833 | } | |
834 | } | |
177c0ea7 | 835 | |
5f5c8ee5 GM |
836 | |
837 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
838 | Increment y-positions in glyph rows between START and END by DY, | |
839 | and recompute their visible height. */ | |
840 | ||
841 | void | |
971de7fb | 842 | shift_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int start, int end, int dy) |
5f5c8ee5 GM |
843 | { |
844 | int min_y, max_y; | |
177c0ea7 | 845 | |
5f5c8ee5 GM |
846 | xassert (start <= end); |
847 | xassert (start >= 0 && start < matrix->nrows); | |
848 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 849 | |
7df02016 KS |
850 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
851 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 852 | |
5f5c8ee5 GM |
853 | for (; start < end; ++start) |
854 | { | |
855 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 856 | |
5f5c8ee5 | 857 | row->y += dy; |
d6c747a4 | 858 | row->visible_height = row->height; |
177c0ea7 | 859 | |
5f5c8ee5 | 860 | if (row->y < min_y) |
d6c747a4 GM |
861 | row->visible_height -= min_y - row->y; |
862 | if (row->y + row->height > max_y) | |
863 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
864 | } |
865 | } | |
866 | ||
867 | ||
868 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
869 | invalid is done by setting enabled_p to zero for all rows in a | |
870 | current matrix. */ | |
871 | ||
872 | void | |
971de7fb | 873 | clear_current_matrices (register struct frame *f) |
5f5c8ee5 GM |
874 | { |
875 | /* Clear frame current matrix, if we have one. */ | |
876 | if (f->current_matrix) | |
877 | clear_glyph_matrix (f->current_matrix); | |
878 | ||
879 | /* Clear the matrix of the menu bar window, if such a window exists. | |
880 | The menu bar window is currently used to display menus on X when | |
881 | no toolkit support is compiled in. */ | |
882 | if (WINDOWP (f->menu_bar_window)) | |
883 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
884 | ||
9ea173e8 GM |
885 | /* Clear the matrix of the tool-bar window, if any. */ |
886 | if (WINDOWP (f->tool_bar_window)) | |
887 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
5f5c8ee5 GM |
888 | |
889 | /* Clear current window matrices. */ | |
890 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
891 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); | |
892 | } | |
893 | ||
894 | ||
895 | /* Clear out all display lines of F for a coming redisplay. */ | |
896 | ||
897 | void | |
971de7fb | 898 | clear_desired_matrices (register struct frame *f) |
5f5c8ee5 GM |
899 | { |
900 | if (f->desired_matrix) | |
901 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 902 | |
5f5c8ee5 GM |
903 | if (WINDOWP (f->menu_bar_window)) |
904 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
905 | ||
9ea173e8 GM |
906 | if (WINDOWP (f->tool_bar_window)) |
907 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
5f5c8ee5 GM |
908 | |
909 | /* Do it for window matrices. */ | |
910 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
911 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
912 | } | |
913 | ||
914 | ||
915 | /* Clear matrices in window tree rooted in W. If DESIRED_P is | |
916 | non-zero clear desired matrices, otherwise clear current matrices. */ | |
917 | ||
918 | static void | |
971de7fb | 919 | clear_window_matrices (struct window *w, int desired_p) |
5f5c8ee5 GM |
920 | { |
921 | while (w) | |
922 | { | |
923 | if (!NILP (w->hchild)) | |
924 | { | |
925 | xassert (WINDOWP (w->hchild)); | |
926 | clear_window_matrices (XWINDOW (w->hchild), desired_p); | |
927 | } | |
928 | else if (!NILP (w->vchild)) | |
929 | { | |
930 | xassert (WINDOWP (w->vchild)); | |
931 | clear_window_matrices (XWINDOW (w->vchild), desired_p); | |
932 | } | |
933 | else | |
934 | { | |
935 | if (desired_p) | |
936 | clear_glyph_matrix (w->desired_matrix); | |
937 | else | |
938 | { | |
939 | clear_glyph_matrix (w->current_matrix); | |
940 | w->window_end_valid = Qnil; | |
941 | } | |
942 | } | |
943 | ||
944 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
945 | } | |
946 | } | |
947 | ||
948 | ||
949 | \f | |
950 | /*********************************************************************** | |
951 | Glyph Rows | |
952 | ||
953 | See dispextern.h for an overall explanation of glyph rows. | |
954 | ***********************************************************************/ | |
955 | ||
956 | /* Clear glyph row ROW. Do it in a way that makes it robust against | |
957 | changes in the glyph_row structure, i.e. addition or removal of | |
958 | structure members. */ | |
959 | ||
2cca872d KH |
960 | static struct glyph_row null_row; |
961 | ||
5f5c8ee5 | 962 | void |
971de7fb | 963 | clear_glyph_row (struct glyph_row *row) |
5f5c8ee5 GM |
964 | { |
965 | struct glyph *p[1 + LAST_AREA]; | |
5f5c8ee5 GM |
966 | |
967 | /* Save pointers. */ | |
968 | p[LEFT_MARGIN_AREA] = row->glyphs[LEFT_MARGIN_AREA]; | |
969 | p[TEXT_AREA] = row->glyphs[TEXT_AREA]; | |
970 | p[RIGHT_MARGIN_AREA] = row->glyphs[RIGHT_MARGIN_AREA]; | |
971 | p[LAST_AREA] = row->glyphs[LAST_AREA]; | |
972 | ||
973 | /* Clear. */ | |
974 | *row = null_row; | |
975 | ||
976 | /* Restore pointers. */ | |
977 | row->glyphs[LEFT_MARGIN_AREA] = p[LEFT_MARGIN_AREA]; | |
978 | row->glyphs[TEXT_AREA] = p[TEXT_AREA]; | |
979 | row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA]; | |
980 | row->glyphs[LAST_AREA] = p[LAST_AREA]; | |
45560b1a GM |
981 | |
982 | #if 0 /* At some point, some bit-fields of struct glyph were not set, | |
983 | which made glyphs unequal when compared with GLYPH_EQUAL_P. | |
984 | Redisplay outputs such glyphs, and flickering effects were | |
985 | the result. This also depended on the contents of memory | |
986 | returned by xmalloc. If flickering happens again, activate | |
153a073c | 987 | the code below. If the flickering is gone with that, chances |
45560b1a | 988 | are that the flickering has the same reason as here. */ |
72af86bd | 989 | memset (p[0], 0, (char *) p[LAST_AREA] - (char *) p[0]); |
45560b1a | 990 | #endif |
5f5c8ee5 GM |
991 | } |
992 | ||
993 | ||
994 | /* Make ROW an empty, enabled row of canonical character height, | |
995 | in window W starting at y-position Y. */ | |
996 | ||
997 | void | |
971de7fb | 998 | blank_row (struct window *w, struct glyph_row *row, int y) |
5f5c8ee5 GM |
999 | { |
1000 | int min_y, max_y; | |
177c0ea7 | 1001 | |
7df02016 KS |
1002 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
1003 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 1004 | |
5f5c8ee5 GM |
1005 | clear_glyph_row (row); |
1006 | row->y = y; | |
408f5064 | 1007 | row->ascent = row->phys_ascent = 0; |
7df02016 | 1008 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 1009 | row->visible_height = row->height; |
177c0ea7 | 1010 | |
5f5c8ee5 | 1011 | if (row->y < min_y) |
d6c747a4 GM |
1012 | row->visible_height -= min_y - row->y; |
1013 | if (row->y + row->height > max_y) | |
1014 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
1015 | |
1016 | row->enabled_p = 1; | |
1017 | } | |
1018 | ||
1019 | ||
1020 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
1021 | are the amounts by which to change positions. Note that the first | |
1022 | glyph of the text area of a row can have a buffer position even if | |
1023 | the used count of the text area is zero. Such rows display line | |
1024 | ends. */ | |
1025 | ||
1026 | void | |
ace1712c EZ |
1027 | increment_row_positions (struct glyph_row *row, |
1028 | EMACS_INT delta, EMACS_INT delta_bytes) | |
5f5c8ee5 GM |
1029 | { |
1030 | int area, i; | |
1031 | ||
1032 | /* Increment start and end positions. */ | |
1033 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
1034 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
1035 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
1036 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
d36fe237 EZ |
1037 | CHARPOS (row->start.pos) += delta; |
1038 | BYTEPOS (row->start.pos) += delta_bytes; | |
1039 | CHARPOS (row->end.pos) += delta; | |
1040 | BYTEPOS (row->end.pos) += delta_bytes; | |
5f5c8ee5 | 1041 | |
5cacdcfd KS |
1042 | if (!row->enabled_p) |
1043 | return; | |
1044 | ||
5f5c8ee5 GM |
1045 | /* Increment positions in glyphs. */ |
1046 | for (area = 0; area < LAST_AREA; ++area) | |
1047 | for (i = 0; i < row->used[area]; ++i) | |
1048 | if (BUFFERP (row->glyphs[area][i].object) | |
1049 | && row->glyphs[area][i].charpos > 0) | |
1050 | row->glyphs[area][i].charpos += delta; | |
1051 | ||
1052 | /* Capture the case of rows displaying a line end. */ | |
1053 | if (row->used[TEXT_AREA] == 0 | |
1054 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1055 | row->glyphs[TEXT_AREA]->charpos += delta; | |
1056 | } | |
1057 | ||
1058 | ||
9af3e742 | 1059 | #if 0 |
5f5c8ee5 GM |
1060 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
1061 | contents, i.e. glyph structure contents are exchanged between A and | |
1062 | B without changing glyph pointers in A and B. */ | |
1063 | ||
1064 | static void | |
1065 | swap_glyphs_in_rows (a, b) | |
1066 | struct glyph_row *a, *b; | |
1067 | { | |
1068 | int area; | |
1069 | ||
1070 | for (area = 0; area < LAST_AREA; ++area) | |
1071 | { | |
1072 | /* Number of glyphs to swap. */ | |
1073 | int max_used = max (a->used[area], b->used[area]); | |
1074 | ||
1075 | /* Start of glyphs in area of row A. */ | |
1076 | struct glyph *glyph_a = a->glyphs[area]; | |
1077 | ||
1078 | /* End + 1 of glyphs in area of row A. */ | |
1079 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
1080 | ||
1081 | /* Start of glyphs in area of row B. */ | |
1082 | struct glyph *glyph_b = b->glyphs[area]; | |
1083 | ||
1084 | while (glyph_a < glyph_a_end) | |
1085 | { | |
1086 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
1087 | initialization. */ | |
1088 | struct glyph temp; | |
1089 | temp = *glyph_a; | |
1090 | *glyph_a = *glyph_b; | |
1091 | *glyph_b = temp; | |
1092 | ++glyph_a; | |
1093 | ++glyph_b; | |
1094 | } | |
1095 | } | |
1096 | } | |
1097 | ||
9af3e742 | 1098 | #endif /* 0 */ |
5f5c8ee5 GM |
1099 | |
1100 | /* Exchange pointers to glyph memory between glyph rows A and B. */ | |
1101 | ||
1102 | static INLINE void | |
971de7fb | 1103 | swap_glyph_pointers (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1104 | { |
1105 | int i; | |
1106 | for (i = 0; i < LAST_AREA + 1; ++i) | |
1107 | { | |
1108 | struct glyph *temp = a->glyphs[i]; | |
1109 | a->glyphs[i] = b->glyphs[i]; | |
1110 | b->glyphs[i] = temp; | |
1111 | } | |
1112 | } | |
1113 | ||
1114 | ||
1115 | /* Copy glyph row structure FROM to glyph row structure TO, except | |
1116 | that glyph pointers in the structures are left unchanged. */ | |
1117 | ||
b6557553 | 1118 | static INLINE void |
971de7fb | 1119 | copy_row_except_pointers (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1120 | { |
1121 | struct glyph *pointers[1 + LAST_AREA]; | |
1122 | ||
1123 | /* Save glyph pointers of TO. */ | |
72af86bd | 1124 | memcpy (pointers, to->glyphs, sizeof to->glyphs); |
5f5c8ee5 GM |
1125 | |
1126 | /* Do a structure assignment. */ | |
1127 | *to = *from; | |
1128 | ||
1129 | /* Restore original pointers of TO. */ | |
72af86bd | 1130 | memcpy (to->glyphs, pointers, sizeof to->glyphs); |
5f5c8ee5 GM |
1131 | } |
1132 | ||
1133 | ||
1134 | /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in | |
1135 | TO and FROM are left unchanged. Glyph contents are copied from the | |
1136 | glyph memory of FROM to the glyph memory of TO. Increment buffer | |
1137 | positions in row TO by DELTA/ DELTA_BYTES. */ | |
1138 | ||
1139 | void | |
ace1712c EZ |
1140 | copy_glyph_row_contents (struct glyph_row *to, struct glyph_row *from, |
1141 | EMACS_INT delta, EMACS_INT delta_bytes) | |
5f5c8ee5 GM |
1142 | { |
1143 | int area; | |
1144 | ||
1145 | /* This is like a structure assignment TO = FROM, except that | |
1146 | glyph pointers in the rows are left unchanged. */ | |
1147 | copy_row_except_pointers (to, from); | |
1148 | ||
1149 | /* Copy glyphs from FROM to TO. */ | |
1150 | for (area = 0; area < LAST_AREA; ++area) | |
1151 | if (from->used[area]) | |
72af86bd AS |
1152 | memcpy (to->glyphs[area], from->glyphs[area], |
1153 | from->used[area] * sizeof (struct glyph)); | |
5f5c8ee5 GM |
1154 | |
1155 | /* Increment buffer positions in TO by DELTA. */ | |
86c11ba1 | 1156 | increment_row_positions (to, delta, delta_bytes); |
5f5c8ee5 GM |
1157 | } |
1158 | ||
1159 | ||
1160 | /* Assign glyph row FROM to glyph row TO. This works like a structure | |
1161 | assignment TO = FROM, except that glyph pointers are not copied but | |
1162 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1163 | a memory leak. */ | |
1164 | ||
1165 | static INLINE void | |
971de7fb | 1166 | assign_row (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1167 | { |
1168 | swap_glyph_pointers (to, from); | |
1169 | copy_row_except_pointers (to, from); | |
1170 | } | |
1171 | ||
1172 | ||
1173 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1174 | a row in a window matrix, is a slice of the glyph memory of the | |
1175 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
1176 | is non-zero if the glyph memory of WINDOW_ROW is part of the glyph | |
1177 | memory of FRAME_ROW. */ | |
1178 | ||
2d5912c1 | 1179 | #if GLYPH_DEBUG |
9339e87f | 1180 | |
5f5c8ee5 | 1181 | static int |
59fc5cf9 | 1182 | glyph_row_slice_p (struct glyph_row *window_row, struct glyph_row *frame_row) |
5f5c8ee5 GM |
1183 | { |
1184 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1185 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1186 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1187 | ||
1188 | return (frame_glyph_start <= window_glyph_start | |
1189 | && window_glyph_start < frame_glyph_end); | |
1190 | } | |
1191 | ||
9339e87f | 1192 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1193 | |
9af3e742 GM |
1194 | #if 0 |
1195 | ||
5f5c8ee5 GM |
1196 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1197 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1198 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1199 | ||
1200 | static struct glyph_row * | |
59fc5cf9 AS |
1201 | find_glyph_row_slice (struct glyph_matrix *window_matrix, |
1202 | struct glyph_matrix *frame_matrix, int row) | |
5f5c8ee5 GM |
1203 | { |
1204 | int i; | |
1205 | ||
1206 | xassert (row >= 0 && row < frame_matrix->nrows); | |
1207 | ||
1208 | for (i = 0; i < window_matrix->nrows; ++i) | |
1209 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1210 | frame_matrix->rows + row)) | |
1211 | break; | |
1212 | ||
1213 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1214 | } | |
1215 | ||
9af3e742 | 1216 | #endif /* 0 */ |
5f5c8ee5 GM |
1217 | |
1218 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1219 | i.e. they are only marked as to be cleared by setting their | |
1220 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1221 | call to this function really clears it. */ | |
1222 | ||
1223 | void | |
971de7fb | 1224 | prepare_desired_row (struct glyph_row *row) |
5f5c8ee5 GM |
1225 | { |
1226 | if (!row->enabled_p) | |
1227 | { | |
5009f85e EZ |
1228 | unsigned rp = row->reversed_p; |
1229 | ||
5f5c8ee5 GM |
1230 | clear_glyph_row (row); |
1231 | row->enabled_p = 1; | |
5009f85e | 1232 | row->reversed_p = rp; |
5f5c8ee5 GM |
1233 | } |
1234 | } | |
1235 | ||
1236 | ||
1237 | /* Return a hash code for glyph row ROW. */ | |
1238 | ||
2f7c71a1 | 1239 | static int |
971de7fb | 1240 | line_hash_code (struct glyph_row *row) |
5f5c8ee5 GM |
1241 | { |
1242 | int hash = 0; | |
177c0ea7 | 1243 | |
5f5c8ee5 GM |
1244 | if (row->enabled_p) |
1245 | { | |
4cecaab8 MB |
1246 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1247 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1248 | ||
1249 | while (glyph < end) | |
1250 | { | |
1251 | int c = glyph->u.ch; | |
1252 | int face_id = glyph->face_id; | |
daf01701 | 1253 | if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
4cecaab8 MB |
1254 | c -= SPACEGLYPH; |
1255 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1256 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1257 | ++glyph; | |
1258 | } | |
5f5c8ee5 | 1259 | |
4cecaab8 MB |
1260 | if (hash == 0) |
1261 | hash = 1; | |
5f5c8ee5 GM |
1262 | } |
1263 | ||
1264 | return hash; | |
1265 | } | |
1266 | ||
1267 | ||
153a073c | 1268 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1269 | the number of characters in the line. If must_write_spaces is |
1270 | zero, leading and trailing spaces are ignored. */ | |
1271 | ||
1272 | static unsigned int | |
971de7fb | 1273 | line_draw_cost (struct glyph_matrix *matrix, int vpos) |
5f5c8ee5 GM |
1274 | { |
1275 | struct glyph_row *row = matrix->rows + vpos; | |
1276 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1277 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1278 | int len; | |
1279 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
1280 | int glyph_table_len = GLYPH_TABLE_LENGTH; | |
1281 | ||
1282 | /* Ignore trailing and leading spaces if we can. */ | |
daf01701 | 1283 | if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
5f5c8ee5 GM |
1284 | { |
1285 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1286 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1287 | --end; |
1288 | ||
177c0ea7 | 1289 | /* All blank line. */ |
5f5c8ee5 GM |
1290 | if (end == beg) |
1291 | return 0; | |
1292 | ||
1293 | /* Skip over leading spaces. */ | |
1294 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1295 | ++beg; | |
1296 | } | |
1297 | ||
1298 | /* If we don't have a glyph-table, each glyph is one character, | |
1299 | so return the number of glyphs. */ | |
1300 | if (glyph_table_base == 0) | |
1301 | len = end - beg; | |
1302 | else | |
1303 | { | |
1304 | /* Otherwise, scan the glyphs and accumulate their total length | |
1305 | in LEN. */ | |
1306 | len = 0; | |
1307 | while (beg < end) | |
1308 | { | |
3fc809e2 | 1309 | GLYPH g; |
177c0ea7 | 1310 | |
3fc809e2 KS |
1311 | SET_GLYPH_FROM_CHAR_GLYPH (g, *beg); |
1312 | ||
565b39a8 | 1313 | if (GLYPH_INVALID_P (g) |
42186983 | 1314 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) |
5f5c8ee5 GM |
1315 | len += 1; |
1316 | else | |
1317 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1318 | |
5f5c8ee5 GM |
1319 | ++beg; |
1320 | } | |
1321 | } | |
177c0ea7 | 1322 | |
5f5c8ee5 GM |
1323 | return len; |
1324 | } | |
1325 | ||
1326 | ||
1327 | /* Test two glyph rows A and B for equality. Value is non-zero if A | |
1328 | and B have equal contents. W is the window to which the glyphs | |
1329 | rows A and B belong. It is needed here to test for partial row | |
e4e0bee9 GM |
1330 | visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p |
1331 | flags of A and B, too. */ | |
5f5c8ee5 | 1332 | |
177c0ea7 | 1333 | static INLINE int |
971de7fb | 1334 | row_equal_p (struct window *w, struct glyph_row *a, struct glyph_row *b, int mouse_face_p) |
5f5c8ee5 GM |
1335 | { |
1336 | if (a == b) | |
1337 | return 1; | |
1338 | else if (a->hash != b->hash) | |
1339 | return 0; | |
1340 | else | |
1341 | { | |
1342 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1343 | int area; | |
1344 | ||
e4e0bee9 GM |
1345 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1346 | return 0; | |
1347 | ||
5f5c8ee5 GM |
1348 | /* Compare glyphs. */ |
1349 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1350 | { | |
1351 | if (a->used[area] != b->used[area]) | |
1352 | return 0; | |
177c0ea7 | 1353 | |
5f5c8ee5 GM |
1354 | a_glyph = a->glyphs[area]; |
1355 | a_end = a_glyph + a->used[area]; | |
1356 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1357 | |
5f5c8ee5 GM |
1358 | while (a_glyph < a_end |
1359 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1360 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1361 | |
5f5c8ee5 GM |
1362 | if (a_glyph != a_end) |
1363 | return 0; | |
1364 | } | |
1365 | ||
6b61353c KH |
1366 | if (a->fill_line_p != b->fill_line_p |
1367 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1368 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
1369 | || a->left_fringe_face_id != b->left_fringe_face_id | |
1370 | || a->right_fringe_bitmap != b->right_fringe_bitmap | |
1371 | || a->right_fringe_face_id != b->right_fringe_face_id | |
3d4a365f | 1372 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
6b61353c | 1373 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1374 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1375 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1376 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
918f4159 | 1377 | || a->reversed_p != b->reversed_p |
5f5c8ee5 GM |
1378 | /* Different partially visible characters on left margin. */ |
1379 | || a->x != b->x | |
1380 | /* Different height. */ | |
1381 | || a->ascent != b->ascent | |
408f5064 GM |
1382 | || a->phys_ascent != b->phys_ascent |
1383 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1384 | || a->visible_height != b->visible_height) |
1385 | return 0; | |
1386 | } | |
1387 | ||
1388 | return 1; | |
1389 | } | |
1390 | ||
1391 | ||
1392 | \f | |
1393 | /*********************************************************************** | |
1394 | Glyph Pool | |
1395 | ||
1396 | See dispextern.h for an overall explanation of glyph pools. | |
1397 | ***********************************************************************/ | |
1398 | ||
1399 | /* Allocate a glyph_pool structure. The structure returned is | |
1400 | initialized with zeros. The global variable glyph_pool_count is | |
1401 | incremented for each pool allocated. */ | |
1402 | ||
1403 | static struct glyph_pool * | |
971de7fb | 1404 | new_glyph_pool (void) |
5f5c8ee5 GM |
1405 | { |
1406 | struct glyph_pool *result; | |
1407 | ||
1408 | /* Allocate a new glyph_pool and clear it. */ | |
1409 | result = (struct glyph_pool *) xmalloc (sizeof *result); | |
72af86bd | 1410 | memset (result, 0, sizeof *result); |
177c0ea7 | 1411 | |
5f5c8ee5 GM |
1412 | /* For memory leak and double deletion checking. */ |
1413 | ++glyph_pool_count; | |
177c0ea7 | 1414 | |
5f5c8ee5 GM |
1415 | return result; |
1416 | } | |
1417 | ||
1418 | ||
1419 | /* Free a glyph_pool structure POOL. The function may be called with | |
1420 | a null POOL pointer. The global variable glyph_pool_count is | |
1421 | decremented with every pool structure freed. If this count gets | |
1422 | negative, more structures were freed than allocated, i.e. one | |
1423 | structure must have been freed more than once or a bogus pointer | |
1424 | was passed to free_glyph_pool. */ | |
1425 | ||
1426 | static void | |
971de7fb | 1427 | free_glyph_pool (struct glyph_pool *pool) |
5f5c8ee5 GM |
1428 | { |
1429 | if (pool) | |
1430 | { | |
153a073c | 1431 | /* More freed than allocated? */ |
5f5c8ee5 GM |
1432 | --glyph_pool_count; |
1433 | xassert (glyph_pool_count >= 0); | |
1434 | ||
1435 | xfree (pool->glyphs); | |
1436 | xfree (pool); | |
1437 | } | |
1438 | } | |
1439 | ||
1440 | ||
1441 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1442 | columns we need. This function never shrinks a pool. The only | |
1443 | case in which this would make sense, would be when a frame's size | |
1444 | is changed from a large value to a smaller one. But, if someone | |
1445 | does it once, we can expect that he will do it again. | |
1446 | ||
1447 | Value is non-zero if the pool changed in a way which makes | |
1448 | re-adjusting window glyph matrices necessary. */ | |
1449 | ||
1450 | static int | |
971de7fb | 1451 | realloc_glyph_pool (struct glyph_pool *pool, struct dim matrix_dim) |
5f5c8ee5 GM |
1452 | { |
1453 | int needed; | |
1454 | int changed_p; | |
1455 | ||
1456 | changed_p = (pool->glyphs == 0 | |
1457 | || matrix_dim.height != pool->nrows | |
1458 | || matrix_dim.width != pool->ncolumns); | |
1459 | ||
1460 | /* Enlarge the glyph pool. */ | |
1461 | needed = matrix_dim.width * matrix_dim.height; | |
1462 | if (needed > pool->nglyphs) | |
1463 | { | |
1464 | int size = needed * sizeof (struct glyph); | |
1465 | ||
1466 | if (pool->glyphs) | |
cb4545ad EZ |
1467 | { |
1468 | pool->glyphs = (struct glyph *) xrealloc (pool->glyphs, size); | |
1469 | memset (pool->glyphs + pool->nglyphs, 0, | |
1470 | size - pool->nglyphs * sizeof (struct glyph)); | |
1471 | } | |
5f5c8ee5 GM |
1472 | else |
1473 | { | |
1474 | pool->glyphs = (struct glyph *) xmalloc (size); | |
72af86bd | 1475 | memset (pool->glyphs, 0, size); |
5f5c8ee5 GM |
1476 | } |
1477 | ||
1478 | pool->nglyphs = needed; | |
1479 | } | |
1480 | ||
153a073c | 1481 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1482 | to do sanity checks, and (b) the number of columns determines |
1483 | where rows in the frame matrix start---this must be available to | |
1484 | determine pointers to rows of window sub-matrices. */ | |
1485 | pool->nrows = matrix_dim.height; | |
1486 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1487 | |
5f5c8ee5 GM |
1488 | return changed_p; |
1489 | } | |
1490 | ||
1491 | ||
1492 | \f | |
1493 | /*********************************************************************** | |
1494 | Debug Code | |
1495 | ***********************************************************************/ | |
1496 | ||
1497 | #if GLYPH_DEBUG | |
1498 | ||
a13396c9 | 1499 | |
28d440ab KL |
1500 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1501 | XXX Maybe this should be changed to flush the current terminal instead of | |
1502 | stdout. | |
1503 | */ | |
a13396c9 GM |
1504 | |
1505 | void | |
59fc5cf9 | 1506 | flush_stdout (void) |
a13396c9 GM |
1507 | { |
1508 | fflush (stdout); | |
1509 | } | |
1510 | ||
1511 | ||
5f5c8ee5 GM |
1512 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1513 | pointer has been lost, e.g. by using a structure assignment between | |
1514 | rows, at least one pointer must occur more than once in the rows of | |
1515 | MATRIX. */ | |
1516 | ||
1517 | void | |
59fc5cf9 | 1518 | check_matrix_pointer_lossage (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
1519 | { |
1520 | int i, j; | |
177c0ea7 | 1521 | |
5f5c8ee5 GM |
1522 | for (i = 0; i < matrix->nrows; ++i) |
1523 | for (j = 0; j < matrix->nrows; ++j) | |
1524 | xassert (i == j | |
1525 | || (matrix->rows[i].glyphs[TEXT_AREA] | |
1526 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1527 | } | |
1528 | ||
1529 | ||
1530 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1531 | ||
1532 | struct glyph_row * | |
59fc5cf9 | 1533 | matrix_row (struct glyph_matrix *matrix, int row) |
5f5c8ee5 GM |
1534 | { |
1535 | xassert (matrix && matrix->rows); | |
1536 | xassert (row >= 0 && row < matrix->nrows); | |
1537 | ||
1538 | /* That's really too slow for normal testing because this function | |
1539 | is called almost everywhere. Although---it's still astonishingly | |
1540 | fast, so it is valuable to have for debugging purposes. */ | |
1541 | #if 0 | |
1542 | check_matrix_pointer_lossage (matrix); | |
1543 | #endif | |
177c0ea7 | 1544 | |
5f5c8ee5 GM |
1545 | return matrix->rows + row; |
1546 | } | |
1547 | ||
1548 | ||
1549 | #if 0 /* This function makes invalid assumptions when text is | |
1550 | partially invisible. But it might come handy for debugging | |
1551 | nevertheless. */ | |
1552 | ||
1553 | /* Check invariants that must hold for an up to date current matrix of | |
1554 | window W. */ | |
1555 | ||
1556 | static void | |
59fc5cf9 | 1557 | check_matrix_invariants (struct window *w) |
5f5c8ee5 GM |
1558 | { |
1559 | struct glyph_matrix *matrix = w->current_matrix; | |
1560 | int yb = window_text_bottom_y (w); | |
1561 | struct glyph_row *row = matrix->rows; | |
1562 | struct glyph_row *last_text_row = NULL; | |
1563 | struct buffer *saved = current_buffer; | |
1564 | struct buffer *buffer = XBUFFER (w->buffer); | |
1565 | int c; | |
177c0ea7 | 1566 | |
5f5c8ee5 GM |
1567 | /* This can sometimes happen for a fresh window. */ |
1568 | if (matrix->nrows < 2) | |
1569 | return; | |
1570 | ||
1571 | set_buffer_temp (buffer); | |
1572 | ||
1573 | /* Note: last row is always reserved for the mode line. */ | |
1574 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1575 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1576 | { | |
1577 | struct glyph_row *next = row + 1; | |
1578 | ||
1579 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1580 | last_text_row = row; | |
1581 | ||
1582 | /* Check that character and byte positions are in sync. */ | |
1583 | xassert (MATRIX_ROW_START_BYTEPOS (row) | |
1584 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); | |
d36fe237 EZ |
1585 | xassert (BYTEPOS (row->start.pos) |
1586 | == CHAR_TO_BYTE (CHARPOS (row->start.pos))); | |
5f5c8ee5 GM |
1587 | |
1588 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1589 | have such a position temporarily in case of a minibuffer | |
1590 | displaying something like `[Sole completion]' at its end. */ | |
1591 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
d36fe237 EZ |
1592 | { |
1593 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1594 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); | |
1595 | xassert (BYTEPOS (row->end.pos) | |
1596 | == CHAR_TO_BYTE (CHARPOS (row->end.pos))); | |
1597 | } | |
5f5c8ee5 GM |
1598 | |
1599 | /* Check that end position of `row' is equal to start position | |
1600 | of next row. */ | |
1601 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1602 | { | |
1603 | xassert (MATRIX_ROW_END_CHARPOS (row) | |
1604 | == MATRIX_ROW_START_CHARPOS (next)); | |
1605 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1606 | == MATRIX_ROW_START_BYTEPOS (next)); | |
d36fe237 EZ |
1607 | xassert (CHARPOS (row->end.pos) == CHARPOS (next->start.pos)); |
1608 | xassert (BYTEPOS (row->end.pos) == BYTEPOS (next->start.pos)); | |
5f5c8ee5 GM |
1609 | } |
1610 | row = next; | |
1611 | } | |
1612 | ||
1613 | xassert (w->current_matrix->nrows == w->desired_matrix->nrows); | |
1614 | xassert (w->desired_matrix->rows != NULL); | |
1615 | set_buffer_temp (saved); | |
1616 | } | |
1617 | ||
1618 | #endif /* 0 */ | |
1619 | ||
1620 | #endif /* GLYPH_DEBUG != 0 */ | |
1621 | ||
1622 | ||
1623 | \f | |
1624 | /********************************************************************** | |
1625 | Allocating/ Adjusting Glyph Matrices | |
1626 | **********************************************************************/ | |
1627 | ||
1628 | /* Allocate glyph matrices over a window tree for a frame-based | |
1629 | redisplay | |
1630 | ||
1631 | X and Y are column/row within the frame glyph matrix where | |
1632 | sub-matrices for the window tree rooted at WINDOW must be | |
8ce2650d YM |
1633 | allocated. DIM_ONLY_P non-zero means that the caller of this |
1634 | function is only interested in the result matrix dimension, and | |
1635 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1636 | |
1637 | The function returns the total width/height of the sub-matrices of | |
1638 | the window tree. If called on a frame root window, the computation | |
1639 | will take the mini-buffer window into account. | |
1640 | ||
1641 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1642 | ||
1643 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1644 | glyph matrices yet, and | |
1645 | ||
1646 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1647 | any window in the tree will be changed or have been changed (see | |
153a073c | 1648 | DIM_ONLY_P) |
5f5c8ee5 GM |
1649 | |
1650 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1651 | function. | |
1652 | ||
1653 | Windows are arranged into chains of windows on the same level | |
1654 | through the next fields of window structures. Such a level can be | |
1655 | either a sequence of horizontally adjacent windows from left to | |
1656 | right, or a sequence of vertically adjacent windows from top to | |
1657 | bottom. Each window in a horizontal sequence can be either a leaf | |
1658 | window or a vertical sequence; a window in a vertical sequence can | |
1659 | be either a leaf or a horizontal sequence. All windows in a | |
1660 | horizontal sequence have the same height, and all windows in a | |
1661 | vertical sequence have the same width. | |
1662 | ||
1663 | This function uses, for historical reasons, a more general | |
1664 | algorithm to determine glyph matrix dimensions that would be | |
1665 | necessary. | |
1666 | ||
1667 | The matrix height of a horizontal sequence is determined by the | |
1668 | maximum height of any matrix in the sequence. The matrix width of | |
1669 | a horizontal sequence is computed by adding up matrix widths of | |
1670 | windows in the sequence. | |
1671 | ||
1672 | |<------- result width ------->| | |
1673 | +---------+----------+---------+ --- | |
1674 | | | | | | | |
1675 | | | | | | |
1676 | +---------+ | | result height | |
1677 | | +---------+ | |
1678 | | | | | |
1679 | +----------+ --- | |
1680 | ||
1681 | The matrix width of a vertical sequence is the maximum matrix width | |
1682 | of any window in the sequence. Its height is computed by adding up | |
1683 | matrix heights of windows in the sequence. | |
1684 | ||
1685 | |<---- result width -->| | |
1686 | +---------+ --- | |
1687 | | | | | |
1688 | | | | | |
1689 | +---------+--+ | | |
1690 | | | | | |
1691 | | | result height | |
1692 | | | | |
1693 | +------------+---------+ | | |
1694 | | | | | |
1695 | | | | | |
1696 | +------------+---------+ --- */ | |
1697 | ||
1698 | /* Bit indicating that a new matrix will be allocated or has been | |
1699 | allocated. */ | |
1700 | ||
1701 | #define NEW_LEAF_MATRIX (1 << 0) | |
1702 | ||
1703 | /* Bit indicating that a matrix will or has changed its location or | |
1704 | size. */ | |
1705 | ||
1706 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1707 | ||
1708 | static struct dim | |
6f704c76 DN |
1709 | allocate_matrices_for_frame_redisplay (Lisp_Object window, int x, int y, |
1710 | int dim_only_p, int *window_change_flags) | |
5f5c8ee5 GM |
1711 | { |
1712 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1713 | int x0 = x, y0 = y; | |
1714 | int wmax = 0, hmax = 0; | |
1715 | struct dim total; | |
1716 | struct dim dim; | |
1717 | struct window *w; | |
1718 | int in_horz_combination_p; | |
1719 | ||
1720 | /* What combination is WINDOW part of? Compute this once since the | |
1721 | result is the same for all windows in the `next' chain. The | |
1722 | special case of a root window (parent equal to nil) is treated | |
1723 | like a vertical combination because a root window's `next' | |
1724 | points to the mini-buffer window, if any, which is arranged | |
1725 | vertically below other windows. */ | |
1726 | in_horz_combination_p | |
1727 | = (!NILP (XWINDOW (window)->parent) | |
1728 | && !NILP (XWINDOW (XWINDOW (window)->parent)->hchild)); | |
1729 | ||
1730 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1731 | do |
5f5c8ee5 GM |
1732 | { |
1733 | w = XWINDOW (window); | |
1734 | ||
1735 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1736 | on whether this is a combination or a leaf window. */ |
5f5c8ee5 | 1737 | if (!NILP (w->hchild)) |
177c0ea7 | 1738 | dim = allocate_matrices_for_frame_redisplay (w->hchild, x, y, |
5f5c8ee5 GM |
1739 | dim_only_p, |
1740 | window_change_flags); | |
1741 | else if (!NILP (w->vchild)) | |
177c0ea7 | 1742 | dim = allocate_matrices_for_frame_redisplay (w->vchild, x, y, |
5f5c8ee5 GM |
1743 | dim_only_p, |
1744 | window_change_flags); | |
1745 | else | |
1746 | { | |
1747 | /* If not already done, allocate sub-matrix structures. */ | |
1748 | if (w->desired_matrix == NULL) | |
1749 | { | |
1750 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1751 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1752 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1753 | } | |
177c0ea7 | 1754 | |
5f5c8ee5 GM |
1755 | /* Width and height MUST be chosen so that there are no |
1756 | holes in the frame matrix. */ | |
5d3cc43c GM |
1757 | dim.width = required_matrix_width (w); |
1758 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1759 | |
1760 | /* Will matrix be re-allocated? */ | |
1761 | if (x != w->desired_matrix->matrix_x | |
1762 | || y != w->desired_matrix->matrix_y | |
1763 | || dim.width != w->desired_matrix->matrix_w | |
1764 | || dim.height != w->desired_matrix->matrix_h | |
1765 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1766 | w->left_margin_cols) |
5f5c8ee5 GM |
1767 | != w->desired_matrix->left_margin_glyphs) |
1768 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1769 | w->right_margin_cols) |
5f5c8ee5 GM |
1770 | != w->desired_matrix->right_margin_glyphs)) |
1771 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1772 | ||
1773 | /* Actually change matrices, if allowed. Do not consider | |
1774 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1775 | may have been changed which we don't now here. We trust | |
1776 | that we only will be called with DIM_ONLY_P != 0 when | |
1777 | necessary. */ | |
1778 | if (!dim_only_p) | |
1779 | { | |
1780 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1781 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1782 | } | |
1783 | } | |
1784 | ||
1785 | /* If we are part of a horizontal combination, advance x for | |
1786 | windows to the right of W; otherwise advance y for windows | |
1787 | below W. */ | |
1788 | if (in_horz_combination_p) | |
1789 | x += dim.width; | |
177c0ea7 | 1790 | else |
5f5c8ee5 GM |
1791 | y += dim.height; |
1792 | ||
1793 | /* Remember maximum glyph matrix dimensions. */ | |
1794 | wmax = max (wmax, dim.width); | |
1795 | hmax = max (hmax, dim.height); | |
1796 | ||
1797 | /* Next window on same level. */ | |
1798 | window = w->next; | |
1799 | } | |
1800 | while (!NILP (window)); | |
1801 | ||
1802 | /* Set `total' to the total glyph matrix dimension of this window | |
1803 | level. In a vertical combination, the width is the width of the | |
1804 | widest window; the height is the y we finally reached, corrected | |
1805 | by the y we started with. In a horizontal combination, the total | |
1806 | height is the height of the tallest window, and the width is the | |
1807 | x we finally reached, corrected by the x we started with. */ | |
1808 | if (in_horz_combination_p) | |
1809 | { | |
1810 | total.width = x - x0; | |
1811 | total.height = hmax; | |
1812 | } | |
177c0ea7 | 1813 | else |
5f5c8ee5 GM |
1814 | { |
1815 | total.width = wmax; | |
1816 | total.height = y - y0; | |
1817 | } | |
1818 | ||
1819 | return total; | |
1820 | } | |
1821 | ||
1822 | ||
5d3cc43c GM |
1823 | /* Return the required height of glyph matrices for window W. */ |
1824 | ||
2f7c71a1 | 1825 | static int |
971de7fb | 1826 | required_matrix_height (struct window *w) |
5d3cc43c GM |
1827 | { |
1828 | #ifdef HAVE_WINDOW_SYSTEM | |
1829 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 1830 | |
5d3cc43c GM |
1831 | if (FRAME_WINDOW_P (f)) |
1832 | { | |
1833 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1ea40aa2 | 1834 | int window_pixel_height = window_box_height (w) + eabs (w->vscroll); |
5d3cc43c | 1835 | return (((window_pixel_height + ch_height - 1) |
cc834cf9 | 1836 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
1837 | /* One partially visible line at the top and |
1838 | bottom of the window. */ | |
1839 | + 2 | |
153a073c | 1840 | /* 2 for header and mode line. */ |
5d3cc43c GM |
1841 | + 2); |
1842 | } | |
1843 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 1844 | |
7df02016 | 1845 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
1846 | } |
1847 | ||
1848 | ||
1849 | /* Return the required width of glyph matrices for window W. */ | |
1850 | ||
2f7c71a1 | 1851 | static int |
971de7fb | 1852 | required_matrix_width (struct window *w) |
5d3cc43c GM |
1853 | { |
1854 | #ifdef HAVE_WINDOW_SYSTEM | |
1855 | struct frame *f = XFRAME (w->frame); | |
1856 | if (FRAME_WINDOW_P (f)) | |
1857 | { | |
1858 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 1859 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 1860 | |
5d3cc43c GM |
1861 | /* Compute number of glyphs needed in a glyph row. */ |
1862 | return (((window_pixel_width + ch_width - 1) | |
cc834cf9 | 1863 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
1864 | /* 2 partially visible columns in the text area. */ |
1865 | + 2 | |
1866 | /* One partially visible column at the right | |
1867 | edge of each marginal area. */ | |
1868 | + 1 + 1); | |
1869 | } | |
1870 | #endif /* HAVE_WINDOW_SYSTEM */ | |
1871 | ||
7df02016 | 1872 | return XINT (w->total_cols); |
5d3cc43c GM |
1873 | } |
1874 | ||
1875 | ||
5f5c8ee5 | 1876 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 1877 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 1878 | |
5f5c8ee5 | 1879 | static void |
971de7fb | 1880 | allocate_matrices_for_window_redisplay (struct window *w) |
5f5c8ee5 | 1881 | { |
5f5c8ee5 GM |
1882 | while (w) |
1883 | { | |
1884 | if (!NILP (w->vchild)) | |
5d3cc43c | 1885 | allocate_matrices_for_window_redisplay (XWINDOW (w->vchild)); |
5f5c8ee5 | 1886 | else if (!NILP (w->hchild)) |
5d3cc43c | 1887 | allocate_matrices_for_window_redisplay (XWINDOW (w->hchild)); |
5f5c8ee5 GM |
1888 | else |
1889 | { | |
1890 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
1891 | struct dim dim; |
1892 | ||
1893 | /* If matrices are not yet allocated, allocate them now. */ | |
1894 | if (w->desired_matrix == NULL) | |
1895 | { | |
1896 | w->desired_matrix = new_glyph_matrix (NULL); | |
1897 | w->current_matrix = new_glyph_matrix (NULL); | |
1898 | } | |
1899 | ||
5d3cc43c GM |
1900 | dim.width = required_matrix_width (w); |
1901 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1902 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
1903 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
1904 | } | |
177c0ea7 | 1905 | |
5f5c8ee5 GM |
1906 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
1907 | } | |
1908 | } | |
1909 | ||
1910 | ||
1911 | /* Re-allocate/ re-compute glyph matrices on frame F. If F is null, | |
1912 | do it for all frames; otherwise do it just for the given frame. | |
1913 | This function must be called when a new frame is created, its size | |
1914 | changes, or its window configuration changes. */ | |
1915 | ||
1916 | void | |
971de7fb | 1917 | adjust_glyphs (struct frame *f) |
5f5c8ee5 | 1918 | { |
408f5064 GM |
1919 | /* Block input so that expose events and other events that access |
1920 | glyph matrices are not processed while we are changing them. */ | |
1921 | BLOCK_INPUT; | |
1922 | ||
5f5c8ee5 GM |
1923 | if (f) |
1924 | adjust_frame_glyphs (f); | |
1925 | else | |
1926 | { | |
1927 | Lisp_Object tail, lisp_frame; | |
177c0ea7 | 1928 | |
5f5c8ee5 GM |
1929 | FOR_EACH_FRAME (tail, lisp_frame) |
1930 | adjust_frame_glyphs (XFRAME (lisp_frame)); | |
1931 | } | |
408f5064 GM |
1932 | |
1933 | UNBLOCK_INPUT; | |
5f5c8ee5 GM |
1934 | } |
1935 | ||
1936 | ||
1937 | /* Adjust frame glyphs when Emacs is initialized. | |
177c0ea7 JB |
1938 | |
1939 | To be called from init_display. | |
1940 | ||
5f5c8ee5 GM |
1941 | We need a glyph matrix because redraw will happen soon. |
1942 | Unfortunately, window sizes on selected_frame are not yet set to | |
1943 | meaningful values. I believe we can assume that there are only two | |
1944 | windows on the frame---the mini-buffer and the root window. Frame | |
1945 | height and width seem to be correct so far. So, set the sizes of | |
1946 | windows to estimated values. */ | |
1947 | ||
1948 | static void | |
971de7fb | 1949 | adjust_frame_glyphs_initially (void) |
5f5c8ee5 | 1950 | { |
91fb7e1b GM |
1951 | struct frame *sf = SELECTED_FRAME (); |
1952 | struct window *root = XWINDOW (sf->root_window); | |
5f5c8ee5 | 1953 | struct window *mini = XWINDOW (root->next); |
7df02016 KS |
1954 | int frame_lines = FRAME_LINES (sf); |
1955 | int frame_cols = FRAME_COLS (sf); | |
91fb7e1b | 1956 | int top_margin = FRAME_TOP_MARGIN (sf); |
5f5c8ee5 GM |
1957 | |
1958 | /* Do it for the root window. */ | |
7df02016 KS |
1959 | XSETFASTINT (root->top_line, top_margin); |
1960 | XSETFASTINT (root->total_cols, frame_cols); | |
1961 | set_window_height (sf->root_window, frame_lines - 1 - top_margin, 0); | |
5f5c8ee5 GM |
1962 | |
1963 | /* Do it for the mini-buffer window. */ | |
7df02016 KS |
1964 | XSETFASTINT (mini->top_line, frame_lines - 1); |
1965 | XSETFASTINT (mini->total_cols, frame_cols); | |
5f5c8ee5 GM |
1966 | set_window_height (root->next, 1, 0); |
1967 | ||
91fb7e1b | 1968 | adjust_frame_glyphs (sf); |
5f5c8ee5 GM |
1969 | glyphs_initialized_initially_p = 1; |
1970 | } | |
177c0ea7 | 1971 | |
5f5c8ee5 GM |
1972 | |
1973 | /* Allocate/reallocate glyph matrices of a single frame F. */ | |
1974 | ||
1975 | static void | |
971de7fb | 1976 | adjust_frame_glyphs (struct frame *f) |
5f5c8ee5 GM |
1977 | { |
1978 | if (FRAME_WINDOW_P (f)) | |
1979 | adjust_frame_glyphs_for_window_redisplay (f); | |
1980 | else | |
1981 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 1982 | |
5f5c8ee5 GM |
1983 | /* Don't forget the message buffer and the buffer for |
1984 | decode_mode_spec. */ | |
1985 | adjust_frame_message_buffer (f); | |
1986 | adjust_decode_mode_spec_buffer (f); | |
1987 | ||
1988 | f->glyphs_initialized_p = 1; | |
1989 | } | |
1990 | ||
075757cc CY |
1991 | /* Return 1 if any window in the tree has nonzero window margins. See |
1992 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ | |
1993 | static int | |
971de7fb | 1994 | showing_window_margins_p (struct window *w) |
075757cc CY |
1995 | { |
1996 | while (w) | |
1997 | { | |
1998 | if (!NILP (w->hchild)) | |
1999 | { | |
2000 | if (showing_window_margins_p (XWINDOW (w->hchild))) | |
2001 | return 1; | |
2002 | } | |
2003 | else if (!NILP (w->vchild)) | |
2004 | { | |
2005 | if (showing_window_margins_p (XWINDOW (w->vchild))) | |
2006 | return 1; | |
2007 | } | |
2008 | else if (!NILP (w->left_margin_cols) | |
2009 | || !NILP (w->right_margin_cols)) | |
2010 | return 1; | |
3fc809e2 | 2011 | |
075757cc CY |
2012 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2013 | } | |
2014 | return 0; | |
2015 | } | |
2016 | ||
5f5c8ee5 | 2017 | |
c9f00270 GM |
2018 | /* In the window tree with root W, build current matrices of leaf |
2019 | windows from the frame's current matrix. */ | |
2020 | ||
2021 | static void | |
971de7fb | 2022 | fake_current_matrices (Lisp_Object window) |
c9f00270 GM |
2023 | { |
2024 | struct window *w; | |
177c0ea7 | 2025 | |
c9f00270 GM |
2026 | for (; !NILP (window); window = w->next) |
2027 | { | |
2028 | w = XWINDOW (window); | |
177c0ea7 | 2029 | |
c9f00270 GM |
2030 | if (!NILP (w->hchild)) |
2031 | fake_current_matrices (w->hchild); | |
2032 | else if (!NILP (w->vchild)) | |
2033 | fake_current_matrices (w->vchild); | |
2034 | else | |
2035 | { | |
2036 | int i; | |
2037 | struct frame *f = XFRAME (w->frame); | |
2038 | struct glyph_matrix *m = w->current_matrix; | |
2039 | struct glyph_matrix *fm = f->current_matrix; | |
2040 | ||
7df02016 KS |
2041 | xassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
2042 | xassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 2043 | |
c9f00270 GM |
2044 | for (i = 0; i < m->matrix_h; ++i) |
2045 | { | |
2046 | struct glyph_row *r = m->rows + i; | |
7df02016 | 2047 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 GM |
2048 | |
2049 | xassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] | |
2050 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); | |
2051 | ||
2052 | r->enabled_p = fr->enabled_p; | |
2053 | if (r->enabled_p) | |
2054 | { | |
2055 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
2056 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
2057 | r->used[TEXT_AREA] = (m->matrix_w | |
2058 | - r->used[LEFT_MARGIN_AREA] | |
2059 | - r->used[RIGHT_MARGIN_AREA]); | |
2060 | r->mode_line_p = 0; | |
c9f00270 GM |
2061 | } |
2062 | } | |
2063 | } | |
2064 | } | |
2065 | } | |
2066 | ||
2067 | ||
bccee4f2 | 2068 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 2069 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 2070 | |
bccee4f2 | 2071 | static struct glyph_matrix * |
971de7fb | 2072 | save_current_matrix (struct frame *f) |
c9f00270 | 2073 | { |
bccee4f2 GM |
2074 | int i; |
2075 | struct glyph_matrix *saved; | |
e797dea6 | 2076 | |
bccee4f2 | 2077 | saved = (struct glyph_matrix *) xmalloc (sizeof *saved); |
72af86bd | 2078 | memset (saved, 0, sizeof *saved); |
bccee4f2 GM |
2079 | saved->nrows = f->current_matrix->nrows; |
2080 | saved->rows = (struct glyph_row *) xmalloc (saved->nrows | |
2081 | * sizeof *saved->rows); | |
72af86bd | 2082 | memset (saved->rows, 0, saved->nrows * sizeof *saved->rows); |
bccee4f2 GM |
2083 | |
2084 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 2085 | { |
bccee4f2 GM |
2086 | struct glyph_row *from = f->current_matrix->rows + i; |
2087 | struct glyph_row *to = saved->rows + i; | |
2088 | size_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); | |
2089 | to->glyphs[TEXT_AREA] = (struct glyph *) xmalloc (nbytes); | |
72af86bd | 2090 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
bccee4f2 | 2091 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
e797dea6 | 2092 | } |
bccee4f2 GM |
2093 | |
2094 | return saved; | |
2095 | } | |
2096 | ||
2097 | ||
2098 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
2099 | and free memory associated with SAVED. */ | |
2100 | ||
2101 | static void | |
971de7fb | 2102 | restore_current_matrix (struct frame *f, struct glyph_matrix *saved) |
bccee4f2 GM |
2103 | { |
2104 | int i; | |
2105 | ||
2106 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 2107 | { |
bccee4f2 GM |
2108 | struct glyph_row *from = saved->rows + i; |
2109 | struct glyph_row *to = f->current_matrix->rows + i; | |
e797dea6 | 2110 | size_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
72af86bd | 2111 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
e797dea6 | 2112 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
bccee4f2 | 2113 | xfree (from->glyphs[TEXT_AREA]); |
e797dea6 | 2114 | } |
177c0ea7 | 2115 | |
bccee4f2 GM |
2116 | xfree (saved->rows); |
2117 | xfree (saved); | |
c9f00270 GM |
2118 | } |
2119 | ||
2120 | ||
bccee4f2 | 2121 | |
5f5c8ee5 GM |
2122 | /* Allocate/reallocate glyph matrices of a single frame F for |
2123 | frame-based redisplay. */ | |
2124 | ||
2125 | static void | |
971de7fb | 2126 | adjust_frame_glyphs_for_frame_redisplay (struct frame *f) |
5f5c8ee5 | 2127 | { |
5f5c8ee5 GM |
2128 | struct dim matrix_dim; |
2129 | int pool_changed_p; | |
2130 | int window_change_flags; | |
2131 | int top_window_y; | |
2132 | ||
2133 | if (!FRAME_LIVE_P (f)) | |
2134 | return; | |
2135 | ||
5f5c8ee5 GM |
2136 | top_window_y = FRAME_TOP_MARGIN (f); |
2137 | ||
2138 | /* Allocate glyph pool structures if not already done. */ | |
2139 | if (f->desired_pool == NULL) | |
2140 | { | |
2141 | f->desired_pool = new_glyph_pool (); | |
2142 | f->current_pool = new_glyph_pool (); | |
2143 | } | |
2144 | ||
2145 | /* Allocate frames matrix structures if needed. */ | |
2146 | if (f->desired_matrix == NULL) | |
2147 | { | |
2148 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
2149 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
2150 | } | |
177c0ea7 | 2151 | |
5f5c8ee5 GM |
2152 | /* Compute window glyph matrices. (This takes the mini-buffer |
2153 | window into account). The result is the size of the frame glyph | |
2154 | matrix needed. The variable window_change_flags is set to a bit | |
2155 | mask indicating whether new matrices will be allocated or | |
2156 | existing matrices change their size or location within the frame | |
2157 | matrix. */ | |
2158 | window_change_flags = 0; | |
2159 | matrix_dim | |
2160 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
2161 | 0, top_window_y, | |
5d3cc43c | 2162 | 1, |
5f5c8ee5 GM |
2163 | &window_change_flags); |
2164 | ||
2165 | /* Add in menu bar lines, if any. */ | |
2166 | matrix_dim.height += top_window_y; | |
2167 | ||
2168 | /* Enlarge pools as necessary. */ | |
2169 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
2170 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
2171 | ||
177c0ea7 | 2172 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
2173 | absolutely necessary since it requires a frame redraw. */ |
2174 | if (pool_changed_p || window_change_flags) | |
2175 | { | |
2176 | /* Do it for window matrices. */ | |
2177 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 2178 | 0, top_window_y, 0, |
5f5c8ee5 GM |
2179 | &window_change_flags); |
2180 | ||
2181 | /* Size of frame matrices must equal size of frame. Note | |
2182 | that we are called for X frames with window widths NOT equal | |
2183 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
7df02016 KS |
2184 | xassert (matrix_dim.width == FRAME_COLS (f) |
2185 | && matrix_dim.height == FRAME_LINES (f)); | |
177c0ea7 | 2186 | |
e797dea6 GM |
2187 | /* Pointers to glyph memory in glyph rows are exchanged during |
2188 | the update phase of redisplay, which means in general that a | |
2189 | frame's current matrix consists of pointers into both the | |
2190 | desired and current glyph pool of the frame. Adjusting a | |
2191 | matrix sets the frame matrix up so that pointers are all into | |
2192 | the same pool. If we want to preserve glyph contents of the | |
2193 | current matrix over a call to adjust_glyph_matrix, we must | |
2194 | make a copy of the current glyphs, and restore the current | |
2195 | matrix' contents from that copy. */ | |
2196 | if (display_completed | |
2197 | && !FRAME_GARBAGED_P (f) | |
2198 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
2199 | && matrix_dim.height == f->current_matrix->matrix_h |
2200 | /* For some reason, the frame glyph matrix gets corrupted if | |
2201 | any of the windows contain margins. I haven't been able | |
2202 | to hunt down the reason, but for the moment this prevents | |
2203 | the problem from manifesting. -- cyd */ | |
2204 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) | |
e797dea6 | 2205 | { |
bccee4f2 GM |
2206 | struct glyph_matrix *copy = save_current_matrix (f); |
2207 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2208 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2209 | restore_current_matrix (f, copy); |
e797dea6 GM |
2210 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2211 | } | |
c9f00270 | 2212 | else |
e797dea6 | 2213 | { |
bccee4f2 | 2214 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2215 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2216 | SET_FRAME_GARBAGED (f); | |
2217 | } | |
5f5c8ee5 GM |
2218 | } |
2219 | } | |
2220 | ||
2221 | ||
2222 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2223 | window-based redisplay. */ | |
2224 | ||
2225 | static void | |
971de7fb | 2226 | adjust_frame_glyphs_for_window_redisplay (struct frame *f) |
5f5c8ee5 | 2227 | { |
5f5c8ee5 GM |
2228 | struct window *w; |
2229 | ||
2230 | xassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); | |
177c0ea7 | 2231 | |
5f5c8ee5 | 2232 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2233 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2234 | |
8ce2650d | 2235 | #ifdef HAVE_X_WINDOWS |
5f5c8ee5 GM |
2236 | /* Allocate/ reallocate matrices of the dummy window used to display |
2237 | the menu bar under X when no X toolkit support is available. */ | |
488dd4c4 | 2238 | #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2239 | { |
2240 | /* Allocate a dummy window if not already done. */ | |
2241 | if (NILP (f->menu_bar_window)) | |
2242 | { | |
2243 | f->menu_bar_window = make_window (); | |
2244 | w = XWINDOW (f->menu_bar_window); | |
2245 | XSETFRAME (w->frame, f); | |
2246 | w->pseudo_window_p = 1; | |
2247 | } | |
2248 | else | |
2249 | w = XWINDOW (f->menu_bar_window); | |
2250 | ||
2251 | /* Set window dimensions to frame dimensions and allocate or | |
2252 | adjust glyph matrices of W. */ | |
7df02016 KS |
2253 | XSETFASTINT (w->top_line, 0); |
2254 | XSETFASTINT (w->left_col, 0); | |
2255 | XSETFASTINT (w->total_lines, FRAME_MENU_BAR_LINES (f)); | |
2256 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
5d3cc43c | 2257 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2258 | } |
57714a86 YM |
2259 | #endif /* not USE_X_TOOLKIT && not USE_GTK */ |
2260 | #endif /* HAVE_X_WINDOWS */ | |
5f5c8ee5 | 2261 | |
488dd4c4 | 2262 | #ifndef USE_GTK |
9ea173e8 GM |
2263 | /* Allocate/ reallocate matrices of the tool bar window. If we |
2264 | don't have a tool bar window yet, make one. */ | |
2265 | if (NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2266 | { |
9ea173e8 GM |
2267 | f->tool_bar_window = make_window (); |
2268 | w = XWINDOW (f->tool_bar_window); | |
5f5c8ee5 GM |
2269 | XSETFRAME (w->frame, f); |
2270 | w->pseudo_window_p = 1; | |
2271 | } | |
2272 | else | |
9ea173e8 | 2273 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2274 | |
7df02016 KS |
2275 | XSETFASTINT (w->top_line, FRAME_MENU_BAR_LINES (f)); |
2276 | XSETFASTINT (w->left_col, 0); | |
2277 | XSETFASTINT (w->total_lines, FRAME_TOOL_BAR_LINES (f)); | |
2278 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
5d3cc43c | 2279 | allocate_matrices_for_window_redisplay (w); |
488dd4c4 | 2280 | #endif |
5f5c8ee5 GM |
2281 | } |
2282 | ||
2283 | ||
177c0ea7 | 2284 | /* Adjust/ allocate message buffer of frame F. |
5f5c8ee5 | 2285 | |
5f5c8ee5 GM |
2286 | Note that the message buffer is never freed. Since I could not |
2287 | find a free in 19.34, I assume that freeing it would be | |
2288 | problematic in some way and don't do it either. | |
2289 | ||
2290 | (Implementation note: It should be checked if we can free it | |
2291 | eventually without causing trouble). */ | |
2292 | ||
2293 | static void | |
971de7fb | 2294 | adjust_frame_message_buffer (struct frame *f) |
5f5c8ee5 GM |
2295 | { |
2296 | int size = FRAME_MESSAGE_BUF_SIZE (f) + 1; | |
2297 | ||
2298 | if (FRAME_MESSAGE_BUF (f)) | |
2299 | { | |
2300 | char *buffer = FRAME_MESSAGE_BUF (f); | |
2301 | char *new_buffer = (char *) xrealloc (buffer, size); | |
5f5c8ee5 GM |
2302 | FRAME_MESSAGE_BUF (f) = new_buffer; |
2303 | } | |
2304 | else | |
2305 | FRAME_MESSAGE_BUF (f) = (char *) xmalloc (size); | |
2306 | } | |
2307 | ||
2308 | ||
2309 | /* Re-allocate buffer for decode_mode_spec on frame F. */ | |
2310 | ||
2311 | static void | |
971de7fb | 2312 | adjust_decode_mode_spec_buffer (struct frame *f) |
5f5c8ee5 GM |
2313 | { |
2314 | f->decode_mode_spec_buffer | |
2315 | = (char *) xrealloc (f->decode_mode_spec_buffer, | |
2316 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
2317 | } | |
2318 | ||
2319 | ||
2320 | \f | |
2321 | /********************************************************************** | |
2322 | Freeing Glyph Matrices | |
2323 | **********************************************************************/ | |
2324 | ||
2325 | /* Free glyph memory for a frame F. F may be null. This function can | |
2326 | be called for the same frame more than once. The root window of | |
2327 | F may be nil when this function is called. This is the case when | |
2328 | the function is called when F is destroyed. */ | |
2329 | ||
2330 | void | |
971de7fb | 2331 | free_glyphs (struct frame *f) |
5f5c8ee5 GM |
2332 | { |
2333 | if (f && f->glyphs_initialized_p) | |
2334 | { | |
42f55fe0 GM |
2335 | /* Block interrupt input so that we don't get surprised by an X |
2336 | event while we're in an inconsistent state. */ | |
2337 | BLOCK_INPUT; | |
5f5c8ee5 | 2338 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2339 | |
5f5c8ee5 GM |
2340 | /* Release window sub-matrices. */ |
2341 | if (!NILP (f->root_window)) | |
2342 | free_window_matrices (XWINDOW (f->root_window)); | |
2343 | ||
2344 | /* Free the dummy window for menu bars without X toolkit and its | |
2345 | glyph matrices. */ | |
2346 | if (!NILP (f->menu_bar_window)) | |
2347 | { | |
2348 | struct window *w = XWINDOW (f->menu_bar_window); | |
2349 | free_glyph_matrix (w->desired_matrix); | |
2350 | free_glyph_matrix (w->current_matrix); | |
2351 | w->desired_matrix = w->current_matrix = NULL; | |
2352 | f->menu_bar_window = Qnil; | |
2353 | } | |
2354 | ||
9ea173e8 GM |
2355 | /* Free the tool bar window and its glyph matrices. */ |
2356 | if (!NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2357 | { |
9ea173e8 | 2358 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2359 | free_glyph_matrix (w->desired_matrix); |
2360 | free_glyph_matrix (w->current_matrix); | |
2361 | w->desired_matrix = w->current_matrix = NULL; | |
9ea173e8 | 2362 | f->tool_bar_window = Qnil; |
5f5c8ee5 GM |
2363 | } |
2364 | ||
2365 | /* Release frame glyph matrices. Reset fields to zero in | |
2366 | case we are called a second time. */ | |
2367 | if (f->desired_matrix) | |
2368 | { | |
2369 | free_glyph_matrix (f->desired_matrix); | |
2370 | free_glyph_matrix (f->current_matrix); | |
2371 | f->desired_matrix = f->current_matrix = NULL; | |
2372 | } | |
2373 | ||
2374 | /* Release glyph pools. */ | |
2375 | if (f->desired_pool) | |
2376 | { | |
2377 | free_glyph_pool (f->desired_pool); | |
2378 | free_glyph_pool (f->current_pool); | |
2379 | f->desired_pool = f->current_pool = NULL; | |
2380 | } | |
177c0ea7 | 2381 | |
42f55fe0 | 2382 | UNBLOCK_INPUT; |
5f5c8ee5 GM |
2383 | } |
2384 | } | |
2385 | ||
2386 | ||
2387 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2388 | function may be called with a null pointer, and it may be called on | |
2389 | the same tree more than once. */ | |
2390 | ||
2391 | void | |
971de7fb | 2392 | free_window_matrices (struct window *w) |
5f5c8ee5 GM |
2393 | { |
2394 | while (w) | |
2395 | { | |
2396 | if (!NILP (w->hchild)) | |
2397 | free_window_matrices (XWINDOW (w->hchild)); | |
2398 | else if (!NILP (w->vchild)) | |
2399 | free_window_matrices (XWINDOW (w->vchild)); | |
177c0ea7 | 2400 | else |
5f5c8ee5 GM |
2401 | { |
2402 | /* This is a leaf window. Free its memory and reset fields | |
2403 | to zero in case this function is called a second time for | |
2404 | W. */ | |
2405 | free_glyph_matrix (w->current_matrix); | |
2406 | free_glyph_matrix (w->desired_matrix); | |
2407 | w->current_matrix = w->desired_matrix = NULL; | |
2408 | } | |
2409 | ||
2410 | /* Next window on same level. */ | |
2411 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2412 | } | |
2413 | } | |
2414 | ||
2415 | ||
2416 | /* Check glyph memory leaks. This function is called from | |
2417 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2418 | exits. We therefore free all glyph memory for all active frames | |
2419 | explicitly and check that nothing is left allocated. */ | |
2420 | ||
2421 | void | |
971de7fb | 2422 | check_glyph_memory (void) |
5f5c8ee5 GM |
2423 | { |
2424 | Lisp_Object tail, frame; | |
2425 | ||
2426 | /* Free glyph memory for all frames. */ | |
2427 | FOR_EACH_FRAME (tail, frame) | |
2428 | free_glyphs (XFRAME (frame)); | |
2429 | ||
2430 | /* Check that nothing is left allocated. */ | |
2431 | if (glyph_matrix_count) | |
2432 | abort (); | |
2433 | if (glyph_pool_count) | |
2434 | abort (); | |
2435 | } | |
2436 | ||
2437 | ||
2438 | \f | |
2439 | /********************************************************************** | |
2440 | Building a Frame Matrix | |
2441 | **********************************************************************/ | |
2442 | ||
2443 | /* Most of the redisplay code works on glyph matrices attached to | |
2444 | windows. This is a good solution most of the time, but it is not | |
2445 | suitable for terminal code. Terminal output functions cannot rely | |
2446 | on being able to set an arbitrary terminal window. Instead they | |
2447 | must be provided with a view of the whole frame, i.e. the whole | |
2448 | screen. We build such a view by constructing a frame matrix from | |
2449 | window matrices in this section. | |
2450 | ||
2451 | Windows that must be updated have their must_be_update_p flag set. | |
2452 | For all such windows, their desired matrix is made part of the | |
2453 | desired frame matrix. For other windows, their current matrix is | |
2454 | made part of the desired frame matrix. | |
2455 | ||
2456 | +-----------------+----------------+ | |
2457 | | desired | desired | | |
2458 | | | | | |
2459 | +-----------------+----------------+ | |
2460 | | current | | |
2461 | | | | |
2462 | +----------------------------------+ | |
2463 | ||
2464 | Desired window matrices can be made part of the frame matrix in a | |
2465 | cheap way: We exploit the fact that the desired frame matrix and | |
2466 | desired window matrices share their glyph memory. This is not | |
2467 | possible for current window matrices. Their glyphs are copied to | |
2468 | the desired frame matrix. The latter is equivalent to | |
2469 | preserve_other_columns in the old redisplay. | |
2470 | ||
2471 | Used glyphs counters for frame matrix rows are the result of adding | |
2472 | up glyph lengths of the window matrices. A line in the frame | |
2473 | matrix is enabled, if a corresponding line in a window matrix is | |
2474 | enabled. | |
177c0ea7 | 2475 | |
5f5c8ee5 GM |
2476 | After building the desired frame matrix, it will be passed to |
2477 | terminal code, which will manipulate both the desired and current | |
2478 | frame matrix. Changes applied to the frame's current matrix have | |
2479 | to be visible in current window matrices afterwards, of course. | |
2480 | ||
2481 | This problem is solved like this: | |
2482 | ||
2483 | 1. Window and frame matrices share glyphs. Window matrices are | |
2484 | constructed in a way that their glyph contents ARE the glyph | |
2485 | contents needed in a frame matrix. Thus, any modification of | |
2486 | glyphs done in terminal code will be reflected in window matrices | |
2487 | automatically. | |
177c0ea7 | 2488 | |
5f5c8ee5 GM |
2489 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2490 | intercepted by hook functions so that corresponding row operations | |
2491 | on window matrices can be performed. This is necessary because we | |
2492 | use pointers to glyphs in glyph row structures. To satisfy the | |
2493 | assumption of point 1 above that glyphs are updated implicitly in | |
2494 | window matrices when they are manipulated via the frame matrix, | |
2495 | window and frame matrix must of course agree where to find the | |
2496 | glyphs for their rows. Possible manipulations that must be | |
2497 | mirrored are assignments of rows of the desired frame matrix to the | |
2498 | current frame matrix and scrolling the current frame matrix. */ | |
2499 | ||
2500 | /* Build frame F's desired matrix from window matrices. Only windows | |
2501 | which have the flag must_be_updated_p set have to be updated. Menu | |
2502 | bar lines of a frame are not covered by window matrices, so make | |
2503 | sure not to touch them in this function. */ | |
2504 | ||
2505 | static void | |
971de7fb | 2506 | build_frame_matrix (struct frame *f) |
5f5c8ee5 GM |
2507 | { |
2508 | int i; | |
2509 | ||
2510 | /* F must have a frame matrix when this function is called. */ | |
2511 | xassert (!FRAME_WINDOW_P (f)); | |
177c0ea7 | 2512 | |
5f5c8ee5 GM |
2513 | /* Clear all rows in the frame matrix covered by window matrices. |
2514 | Menu bar lines are not covered by windows. */ | |
2515 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2516 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2517 | ||
2518 | /* Build the matrix by walking the window tree. */ | |
2519 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2520 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2521 | } | |
2522 | ||
2523 | ||
2524 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2525 | matrices. W is the root of a window tree. */ | |
2526 | ||
2527 | static void | |
971de7fb | 2528 | build_frame_matrix_from_window_tree (struct glyph_matrix *matrix, struct window *w) |
5f5c8ee5 GM |
2529 | { |
2530 | while (w) | |
2531 | { | |
2532 | if (!NILP (w->hchild)) | |
2533 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->hchild)); | |
2534 | else if (!NILP (w->vchild)) | |
2535 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->vchild)); | |
2536 | else | |
2537 | build_frame_matrix_from_leaf_window (matrix, w); | |
2538 | ||
2539 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2540 | } | |
2541 | } | |
2542 | ||
2543 | ||
2544 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2545 | desired frame matrix built. W is a leaf window whose desired or | |
2546 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2547 | must_be_updated_p determines which matrix it contributes to | |
2548 | FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix | |
2549 | is added to FRAME_MATRIX, otherwise W's current matrix is added. | |
2550 | Adding a desired matrix means setting up used counters and such in | |
2551 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2552 | means copying glyphs. The latter case corresponds to | |
2553 | preserve_other_columns in the old redisplay. */ | |
2554 | ||
2555 | static void | |
971de7fb | 2556 | build_frame_matrix_from_leaf_window (struct glyph_matrix *frame_matrix, struct window *w) |
5f5c8ee5 GM |
2557 | { |
2558 | struct glyph_matrix *window_matrix; | |
2559 | int window_y, frame_y; | |
2560 | /* If non-zero, a glyph to insert at the right border of W. */ | |
3fc809e2 KS |
2561 | GLYPH right_border_glyph; |
2562 | ||
2563 | SET_GLYPH_FROM_CHAR (right_border_glyph, 0); | |
5f5c8ee5 GM |
2564 | |
2565 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2566 | if (w->must_be_updated_p) | |
2567 | { | |
2568 | window_matrix = w->desired_matrix; | |
2569 | ||
2570 | /* Decide whether we want to add a vertical border glyph. */ | |
2571 | if (!WINDOW_RIGHTMOST_P (w)) | |
2572 | { | |
2573 | struct Lisp_Char_Table *dp = window_display_table (w); | |
3fc809e2 | 2574 | Lisp_Object gc; |
b4e49aee | 2575 | |
3fc809e2 KS |
2576 | SET_GLYPH_FROM_CHAR (right_border_glyph, '|'); |
2577 | if (dp | |
2578 | && (gc = DISP_BORDER_GLYPH (dp), GLYPH_CODE_P (gc)) | |
2579 | && GLYPH_CODE_CHAR_VALID_P (gc)) | |
2580 | { | |
2581 | SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph, gc); | |
2582 | spec_glyph_lookup_face (w, &right_border_glyph); | |
2583 | } | |
b4e49aee | 2584 | |
3fc809e2 KS |
2585 | if (GLYPH_FACE (right_border_glyph) <= 0) |
2586 | SET_GLYPH_FACE (right_border_glyph, VERTICAL_BORDER_FACE_ID); | |
5f5c8ee5 GM |
2587 | } |
2588 | } | |
2589 | else | |
2590 | window_matrix = w->current_matrix; | |
2591 | ||
2592 | /* For all rows in the window matrix and corresponding rows in the | |
2593 | frame matrix. */ | |
2594 | window_y = 0; | |
2595 | frame_y = window_matrix->matrix_y; | |
2596 | while (window_y < window_matrix->nrows) | |
2597 | { | |
2598 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2599 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
2a8bd25f | 2600 | int current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2601 | |
2602 | /* Fill up the frame row with spaces up to the left margin of the | |
2603 | window row. */ | |
2604 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2605 | ||
2606 | /* Fill up areas in the window matrix row with spaces. */ | |
2607 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2608 | |
2609 | /* If only part of W's desired matrix has been built, and | |
2610 | window_row wasn't displayed, use the corresponding current | |
2611 | row instead. */ | |
2612 | if (window_matrix == w->desired_matrix | |
2613 | && !window_row->enabled_p) | |
2614 | { | |
2615 | window_row = w->current_matrix->rows + window_y; | |
2616 | current_row_p = 1; | |
2617 | } | |
177c0ea7 | 2618 | |
2a8bd25f | 2619 | if (current_row_p) |
5f5c8ee5 | 2620 | { |
2a8bd25f | 2621 | /* Copy window row to frame row. */ |
72af86bd AS |
2622 | memcpy (frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, |
2623 | window_row->glyphs[0], | |
2624 | window_matrix->matrix_w * sizeof (struct glyph)); | |
5f5c8ee5 GM |
2625 | } |
2626 | else | |
2627 | { | |
2a8bd25f | 2628 | xassert (window_row->enabled_p); |
177c0ea7 | 2629 | |
2a8bd25f GM |
2630 | /* Only when a desired row has been displayed, we want |
2631 | the corresponding frame row to be updated. */ | |
2632 | frame_row->enabled_p = 1; | |
177c0ea7 | 2633 | |
5f5c8ee5 GM |
2634 | /* Maybe insert a vertical border between horizontally adjacent |
2635 | windows. */ | |
3fc809e2 | 2636 | if (GLYPH_CHAR (right_border_glyph) != 0) |
5f5c8ee5 GM |
2637 | { |
2638 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2639 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2640 | } | |
2641 | ||
498c08ea | 2642 | #if GLYPH_DEBUG |
a13396c9 GM |
2643 | /* Window row window_y must be a slice of frame row |
2644 | frame_y. */ | |
5f5c8ee5 | 2645 | xassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2646 | |
5f5c8ee5 GM |
2647 | /* If rows are in sync, we don't have to copy glyphs because |
2648 | frame and window share glyphs. */ | |
177c0ea7 | 2649 | |
a38634ff | 2650 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2651 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2652 | #endif |
5f5c8ee5 GM |
2653 | } |
2654 | ||
2655 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2656 | up with spaces, and visit leaf windows from left to right it | |
2657 | can be done simply. */ | |
177c0ea7 | 2658 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2659 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2660 | ||
5f5c8ee5 GM |
2661 | /* Next row. */ |
2662 | ++window_y; | |
2663 | ++frame_y; | |
2664 | } | |
2665 | } | |
2666 | ||
5f81871e RS |
2667 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2668 | ID, return a glyph that has a realized face ID. | |
2669 | This is used for glyphs displayed specially and not part of the text; | |
2670 | for instance, vertical separators, truncation markers, etc. */ | |
2671 | ||
3fc809e2 | 2672 | void |
971de7fb | 2673 | spec_glyph_lookup_face (struct window *w, GLYPH *glyph) |
5f81871e | 2674 | { |
3fc809e2 | 2675 | int lface_id = GLYPH_FACE (*glyph); |
5f81871e RS |
2676 | /* Convert the glyph's specified face to a realized (cache) face. */ |
2677 | if (lface_id > 0) | |
2678 | { | |
2679 | int face_id = merge_faces (XFRAME (w->frame), | |
2680 | Qt, lface_id, DEFAULT_FACE_ID); | |
3fc809e2 | 2681 | SET_GLYPH_FACE (*glyph, face_id); |
5f81871e | 2682 | } |
5f81871e | 2683 | } |
5f5c8ee5 GM |
2684 | |
2685 | /* Add spaces to a glyph row ROW in a window matrix. | |
2686 | ||
2687 | Each row has the form: | |
2688 | ||
2689 | +---------+-----------------------------+------------+ | |
2690 | | left | text | right | | |
2691 | +---------+-----------------------------+------------+ | |
2692 | ||
2693 | Left and right marginal areas are optional. This function adds | |
2694 | spaces to areas so that there are no empty holes between areas. | |
2695 | In other words: If the right area is not empty, the text area | |
2696 | is filled up with spaces up to the right area. If the text area | |
2697 | is not empty, the left area is filled up. | |
2698 | ||
2699 | To be called for frame-based redisplay, only. */ | |
2700 | ||
2701 | static void | |
971de7fb | 2702 | fill_up_glyph_row_with_spaces (struct glyph_row *row) |
5f5c8ee5 GM |
2703 | { |
2704 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2705 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2706 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2707 | } | |
2708 | ||
2709 | ||
2710 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2711 | frame-based redisplay only. */ | |
2712 | ||
2713 | static void | |
971de7fb | 2714 | fill_up_glyph_row_area_with_spaces (struct glyph_row *row, int area) |
5f5c8ee5 GM |
2715 | { |
2716 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2717 | { | |
2718 | struct glyph *end = row->glyphs[area + 1]; | |
2719 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2720 | ||
2721 | while (text < end) | |
2722 | *text++ = space_glyph; | |
2723 | row->used[area] = text - row->glyphs[area]; | |
2724 | } | |
2725 | } | |
2726 | ||
2727 | ||
2728 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2729 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2730 | ||
2731 | static void | |
971de7fb | 2732 | fill_up_frame_row_with_spaces (struct glyph_row *row, int upto) |
5f5c8ee5 GM |
2733 | { |
2734 | int i = row->used[TEXT_AREA]; | |
2735 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2736 | |
5f5c8ee5 GM |
2737 | while (i < upto) |
2738 | glyph[i++] = space_glyph; | |
2739 | ||
2740 | row->used[TEXT_AREA] = i; | |
2741 | } | |
2742 | ||
2743 | ||
2744 | \f | |
2745 | /********************************************************************** | |
2746 | Mirroring operations on frame matrices in window matrices | |
2747 | **********************************************************************/ | |
2748 | ||
2749 | /* Set frame being updated via frame-based redisplay to F. This | |
2750 | function must be called before updates to make explicit that we are | |
2751 | working on frame matrices or not. */ | |
2752 | ||
2753 | static INLINE void | |
971de7fb | 2754 | set_frame_matrix_frame (struct frame *f) |
5f5c8ee5 GM |
2755 | { |
2756 | frame_matrix_frame = f; | |
2757 | } | |
2758 | ||
2759 | ||
2760 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2761 | DESIRED_MATRIX is the desired matrix corresponding to | |
2762 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2763 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2764 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2765 | done in frame matrices, and that we have to perform analogous | |
2766 | operations in window matrices of frame_matrix_frame. */ | |
2767 | ||
2768 | static INLINE void | |
971de7fb | 2769 | make_current (struct glyph_matrix *desired_matrix, struct glyph_matrix *current_matrix, int row) |
5f5c8ee5 GM |
2770 | { |
2771 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2772 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
e876ff42 | 2773 | int mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2774 | |
2775 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2776 | between both rows, and does a structure assignment otherwise. */ | |
2777 | assign_row (current_row, desired_row); | |
2778 | ||
2779 | /* Enable current_row to mark it as valid. */ | |
2780 | current_row->enabled_p = 1; | |
e876ff42 | 2781 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2782 | |
2783 | /* If we are called on frame matrices, perform analogous operations | |
2784 | for window matrices. */ | |
2785 | if (frame_matrix_frame) | |
2786 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); | |
2787 | } | |
2788 | ||
2789 | ||
2790 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2791 | W's frame which has been made current (by swapping pointers between | |
2792 | current and desired matrix). Perform analogous operations in the | |
2793 | matrices of leaf windows in the window tree rooted at W. */ | |
2794 | ||
2795 | static void | |
971de7fb | 2796 | mirror_make_current (struct window *w, int frame_row) |
5f5c8ee5 GM |
2797 | { |
2798 | while (w) | |
2799 | { | |
2800 | if (!NILP (w->hchild)) | |
2801 | mirror_make_current (XWINDOW (w->hchild), frame_row); | |
2802 | else if (!NILP (w->vchild)) | |
2803 | mirror_make_current (XWINDOW (w->vchild), frame_row); | |
2804 | else | |
2805 | { | |
2806 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2807 | here because the checks performed in debug mode there | |
2808 | will not allow the conversion. */ | |
2809 | int row = frame_row - w->desired_matrix->matrix_y; | |
2810 | ||
2811 | /* If FRAME_ROW is within W, assign the desired row to the | |
2812 | current row (exchanging glyph pointers). */ | |
2813 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
2814 | { | |
2815 | struct glyph_row *current_row | |
2816 | = MATRIX_ROW (w->current_matrix, row); | |
2817 | struct glyph_row *desired_row | |
2818 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
2819 | |
2820 | if (desired_row->enabled_p) | |
2821 | assign_row (current_row, desired_row); | |
2822 | else | |
2823 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 | 2824 | current_row->enabled_p = 1; |
d009ae66 EZ |
2825 | |
2826 | /* Set the Y coordinate of the mode/header line's row. | |
2827 | It is needed in draw_row_with_mouse_face to find the | |
2828 | screen coordinates. (Window-based redisplay sets | |
2829 | this in update_window, but no one seems to do that | |
2830 | for frame-based redisplay.) */ | |
2831 | if (current_row->mode_line_p) | |
2832 | current_row->y = row; | |
5f5c8ee5 GM |
2833 | } |
2834 | } | |
177c0ea7 | 2835 | |
5f5c8ee5 GM |
2836 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2837 | } | |
2838 | } | |
2839 | ||
2840 | ||
2841 | /* Perform row dance after scrolling. We are working on the range of | |
2842 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
2843 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
2844 | row I in the range 0 <= I < NLINES, the index of the original line | |
2845 | to move to I. This index is relative to the row range, i.e. 0 <= | |
2846 | index < NLINES. RETAINED_P is a vector containing zero for each | |
2847 | row 0 <= I < NLINES which is empty. | |
2848 | ||
2849 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 2850 | |
5f5c8ee5 | 2851 | void |
6f704c76 DN |
2852 | mirrored_line_dance (struct glyph_matrix *matrix, int unchanged_at_top, int nlines, |
2853 | int *copy_from, char *retained_p) | |
5f5c8ee5 GM |
2854 | { |
2855 | /* A copy of original rows. */ | |
2856 | struct glyph_row *old_rows; | |
2857 | ||
2858 | /* Rows to assign to. */ | |
2859 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 2860 | |
5f5c8ee5 GM |
2861 | int i; |
2862 | ||
2863 | /* Make a copy of the original rows. */ | |
2864 | old_rows = (struct glyph_row *) alloca (nlines * sizeof *old_rows); | |
72af86bd | 2865 | memcpy (old_rows, new_rows, nlines * sizeof *old_rows); |
5f5c8ee5 GM |
2866 | |
2867 | /* Assign new rows, maybe clear lines. */ | |
2868 | for (i = 0; i < nlines; ++i) | |
2869 | { | |
2870 | int enabled_before_p = new_rows[i].enabled_p; | |
2871 | ||
2872 | xassert (i + unchanged_at_top < matrix->nrows); | |
2873 | xassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
2874 | new_rows[i] = old_rows[copy_from[i]]; | |
2875 | new_rows[i].enabled_p = enabled_before_p; | |
2876 | ||
2877 | /* RETAINED_P is zero for empty lines. */ | |
2878 | if (!retained_p[copy_from[i]]) | |
2879 | new_rows[i].enabled_p = 0; | |
2880 | } | |
2881 | ||
153a073c | 2882 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 GM |
2883 | if (frame_matrix_frame) |
2884 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), | |
2885 | unchanged_at_top, nlines, copy_from, retained_p); | |
2886 | } | |
2887 | ||
2888 | ||
a13396c9 | 2889 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 2890 | the current frame matrix. */ |
a13396c9 GM |
2891 | |
2892 | static void | |
971de7fb | 2893 | sync_window_with_frame_matrix_rows (struct window *w) |
a13396c9 GM |
2894 | { |
2895 | struct frame *f = XFRAME (w->frame); | |
2896 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
075c507b | 2897 | int left, right, x, width; |
a13396c9 | 2898 | |
5cb88111 | 2899 | /* Preconditions: W must be a leaf window on a tty frame. */ |
a13396c9 | 2900 | xassert (NILP (w->hchild) && NILP (w->vchild)); |
a13396c9 GM |
2901 | xassert (!FRAME_WINDOW_P (f)); |
2902 | ||
7df02016 KS |
2903 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
2904 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
2905 | x = w->current_matrix->matrix_x; |
2906 | width = w->current_matrix->matrix_w; | |
2907 | ||
a13396c9 GM |
2908 | window_row = w->current_matrix->rows; |
2909 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 2910 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 2911 | |
5cb88111 | 2912 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 2913 | { |
5cb88111 GM |
2914 | window_row->glyphs[LEFT_MARGIN_AREA] |
2915 | = frame_row->glyphs[0] + x; | |
2916 | window_row->glyphs[TEXT_AREA] | |
2917 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
2918 | window_row->glyphs[LAST_AREA] | |
2919 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
2920 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
2921 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
2922 | } |
2923 | } | |
2924 | ||
2925 | ||
2926 | /* Return the window in the window tree rooted in W containing frame | |
2927 | row ROW. Value is null if none is found. */ | |
2928 | ||
2929 | struct window * | |
971de7fb | 2930 | frame_row_to_window (struct window *w, int row) |
a13396c9 GM |
2931 | { |
2932 | struct window *found = NULL; | |
177c0ea7 | 2933 | |
a13396c9 GM |
2934 | while (w && !found) |
2935 | { | |
2936 | if (!NILP (w->hchild)) | |
2937 | found = frame_row_to_window (XWINDOW (w->hchild), row); | |
2938 | else if (!NILP (w->vchild)) | |
2939 | found = frame_row_to_window (XWINDOW (w->vchild), row); | |
7df02016 KS |
2940 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
2941 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 2942 | found = w; |
177c0ea7 | 2943 | |
a13396c9 GM |
2944 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2945 | } | |
2946 | ||
2947 | return found; | |
2948 | } | |
2949 | ||
2950 | ||
5f5c8ee5 GM |
2951 | /* Perform a line dance in the window tree rooted at W, after |
2952 | scrolling a frame matrix in mirrored_line_dance. | |
2953 | ||
2954 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
2955 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
2956 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
2957 | I < NLINES, the index of the original line to move to I. This | |
2958 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
2959 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
2960 | which is empty. */ | |
2961 | ||
2962 | static void | |
971de7fb | 2963 | mirror_line_dance (struct window *w, int unchanged_at_top, int nlines, int *copy_from, char *retained_p) |
5f5c8ee5 GM |
2964 | { |
2965 | while (w) | |
2966 | { | |
2967 | if (!NILP (w->hchild)) | |
2968 | mirror_line_dance (XWINDOW (w->hchild), unchanged_at_top, | |
2969 | nlines, copy_from, retained_p); | |
2970 | else if (!NILP (w->vchild)) | |
2971 | mirror_line_dance (XWINDOW (w->vchild), unchanged_at_top, | |
2972 | nlines, copy_from, retained_p); | |
2973 | else | |
2974 | { | |
2975 | /* W is a leaf window, and we are working on its current | |
2976 | matrix m. */ | |
2977 | struct glyph_matrix *m = w->current_matrix; | |
a13396c9 | 2978 | int i, sync_p = 0; |
5f5c8ee5 GM |
2979 | struct glyph_row *old_rows; |
2980 | ||
2981 | /* Make a copy of the original rows of matrix m. */ | |
2982 | old_rows = (struct glyph_row *) alloca (m->nrows * sizeof *old_rows); | |
72af86bd | 2983 | memcpy (old_rows, m->rows, m->nrows * sizeof *old_rows); |
5f5c8ee5 GM |
2984 | |
2985 | for (i = 0; i < nlines; ++i) | |
2986 | { | |
2987 | /* Frame relative line assigned to. */ | |
2988 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 2989 | |
5f5c8ee5 GM |
2990 | /* Frame relative line assigned. */ |
2991 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 2992 | |
5f5c8ee5 GM |
2993 | /* Window relative line assigned to. */ |
2994 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 2995 | |
5f5c8ee5 GM |
2996 | /* Window relative line assigned. */ |
2997 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 2998 | |
5f5c8ee5 GM |
2999 | /* Is assigned line inside window? */ |
3000 | int from_inside_window_p | |
3001 | = window_from >= 0 && window_from < m->matrix_h; | |
177c0ea7 | 3002 | |
a13396c9 GM |
3003 | /* Is assigned to line inside window? */ |
3004 | int to_inside_window_p | |
3005 | = window_to >= 0 && window_to < m->matrix_h; | |
177c0ea7 | 3006 | |
a13396c9 | 3007 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 3008 | { |
5f5c8ee5 GM |
3009 | /* Enabled setting before assignment. */ |
3010 | int enabled_before_p; | |
177c0ea7 | 3011 | |
5f5c8ee5 GM |
3012 | /* Do the assignment. The enabled_p flag is saved |
3013 | over the assignment because the old redisplay did | |
3014 | that. */ | |
3015 | enabled_before_p = m->rows[window_to].enabled_p; | |
3016 | m->rows[window_to] = old_rows[window_from]; | |
3017 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 3018 | |
5f5c8ee5 GM |
3019 | /* If frame line is empty, window line is empty, too. */ |
3020 | if (!retained_p[copy_from[i]]) | |
3021 | m->rows[window_to].enabled_p = 0; | |
3022 | } | |
a13396c9 GM |
3023 | else if (to_inside_window_p) |
3024 | { | |
3025 | /* A copy between windows. This is an infrequent | |
3026 | case not worth optimizing. */ | |
3027 | struct frame *f = XFRAME (w->frame); | |
3028 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); | |
3029 | struct window *w2; | |
3030 | struct glyph_matrix *m2; | |
3031 | int m2_from; | |
3032 | ||
fe8b8401 | 3033 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
3034 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
3035 | -nw', FROM_FRAME sometimes has no associated window. | |
3036 | This check avoids a segfault if W2 is null. */ | |
3037 | if (w2) | |
3038 | { | |
3039 | m2 = w2->current_matrix; | |
3040 | m2_from = frame_from - m2->matrix_y; | |
3041 | copy_row_except_pointers (m->rows + window_to, | |
3042 | m2->rows + m2_from); | |
3043 | ||
3044 | /* If frame line is empty, window line is empty, too. */ | |
3045 | if (!retained_p[copy_from[i]]) | |
3046 | m->rows[window_to].enabled_p = 0; | |
3047 | } | |
a13396c9 GM |
3048 | sync_p = 1; |
3049 | } | |
3050 | else if (from_inside_window_p) | |
3051 | sync_p = 1; | |
5f5c8ee5 | 3052 | } |
a13396c9 GM |
3053 | |
3054 | /* If there was a copy between windows, make sure glyph | |
3055 | pointers are in sync with the frame matrix. */ | |
3056 | if (sync_p) | |
3057 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 3058 | |
5f5c8ee5 GM |
3059 | /* Check that no pointers are lost. */ |
3060 | CHECK_MATRIX (m); | |
3061 | } | |
3062 | ||
3063 | /* Next window on same level. */ | |
3064 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3065 | } | |
3066 | } | |
3067 | ||
3068 | ||
3069 | #if GLYPH_DEBUG | |
3070 | ||
3071 | /* Check that window and frame matrices agree about their | |
3072 | understanding where glyphs of the rows are to find. For each | |
3073 | window in the window tree rooted at W, check that rows in the | |
3074 | matrices of leaf window agree with their frame matrices about | |
3075 | glyph pointers. */ | |
3076 | ||
3077 | void | |
59fc5cf9 | 3078 | check_window_matrix_pointers (struct window *w) |
5f5c8ee5 GM |
3079 | { |
3080 | while (w) | |
3081 | { | |
3082 | if (!NILP (w->hchild)) | |
3083 | check_window_matrix_pointers (XWINDOW (w->hchild)); | |
3084 | else if (!NILP (w->vchild)) | |
3085 | check_window_matrix_pointers (XWINDOW (w->vchild)); | |
3086 | else | |
60a8948a | 3087 | { |
5f5c8ee5 GM |
3088 | struct frame *f = XFRAME (w->frame); |
3089 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); | |
3090 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 3091 | } |
177c0ea7 | 3092 | |
5f5c8ee5 GM |
3093 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3094 | } | |
3095 | } | |
3096 | ||
3097 | ||
3098 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
3099 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
3100 | each row in WINDOW_MATRIX check that it's a slice of the | |
3101 | corresponding frame row. If it isn't, abort. */ | |
3102 | ||
3103 | static void | |
59fc5cf9 AS |
3104 | check_matrix_pointers (struct glyph_matrix *window_matrix, |
3105 | struct glyph_matrix *frame_matrix) | |
5f5c8ee5 GM |
3106 | { |
3107 | /* Row number in WINDOW_MATRIX. */ | |
3108 | int i = 0; | |
3109 | ||
3110 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
3111 | int j = window_matrix->matrix_y; | |
3112 | ||
177c0ea7 | 3113 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
3114 | slice of the row in the frame matrix. If it isn't we didn't |
3115 | mirror an operation on the frame matrix correctly. */ | |
3116 | while (i < window_matrix->nrows) | |
3117 | { | |
3118 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
3119 | frame_matrix->rows + j)) | |
3120 | abort (); | |
3121 | ++i, ++j; | |
3122 | } | |
3123 | } | |
3124 | ||
3125 | #endif /* GLYPH_DEBUG != 0 */ | |
3126 | ||
3127 | ||
3128 | \f | |
3129 | /********************************************************************** | |
3130 | VPOS and HPOS translations | |
3131 | **********************************************************************/ | |
3132 | ||
3133 | #if GLYPH_DEBUG | |
3134 | ||
3135 | /* Translate vertical position VPOS which is relative to window W to a | |
3136 | vertical position relative to W's frame. */ | |
3137 | ||
3138 | static int | |
59fc5cf9 | 3139 | window_to_frame_vpos (struct window *w, int vpos) |
5f5c8ee5 GM |
3140 | { |
3141 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 3142 | |
5f5c8ee5 GM |
3143 | xassert (!FRAME_WINDOW_P (f)); |
3144 | xassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); | |
7df02016 KS |
3145 | vpos += WINDOW_TOP_EDGE_LINE (w); |
3146 | xassert (vpos >= 0 && vpos <= FRAME_LINES (f)); | |
5f5c8ee5 GM |
3147 | return vpos; |
3148 | } | |
3149 | ||
3150 | ||
3151 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 3152 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
3153 | |
3154 | static int | |
59fc5cf9 | 3155 | window_to_frame_hpos (struct window *w, int hpos) |
5f5c8ee5 | 3156 | { |
82f4a138 | 3157 | xassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 3158 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
3159 | return hpos; |
3160 | } | |
177c0ea7 | 3161 | |
5f5c8ee5 GM |
3162 | #endif /* GLYPH_DEBUG */ |
3163 | ||
3164 | ||
3165 | \f | |
3166 | /********************************************************************** | |
3167 | Redrawing Frames | |
3168 | **********************************************************************/ | |
3169 | ||
3170 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, | |
7ee72033 | 3171 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. */) |
5842a27b | 3172 | (Lisp_Object frame) |
5f5c8ee5 GM |
3173 | { |
3174 | struct frame *f; | |
3175 | ||
b7826503 | 3176 | CHECK_LIVE_FRAME (frame); |
5f5c8ee5 GM |
3177 | f = XFRAME (frame); |
3178 | ||
3179 | /* Ignore redraw requests, if frame has no glyphs yet. | |
3180 | (Implementation note: It still has to be checked why we are | |
3181 | called so early here). */ | |
3182 | if (!glyphs_initialized_initially_p) | |
3183 | return Qnil; | |
3184 | ||
3185 | update_begin (f); | |
3224dac1 | 3186 | #ifdef MSDOS |
f2adda5e | 3187 | if (FRAME_MSDOS_P (f)) |
79d39b69 | 3188 | FRAME_TERMINAL (f)->set_terminal_modes_hook (FRAME_TERMINAL (f)); |
3224dac1 | 3189 | #endif |
385ed61f | 3190 | clear_frame (f); |
5f5c8ee5 GM |
3191 | clear_current_matrices (f); |
3192 | update_end (f); | |
daf01701 | 3193 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3194 | fflush (FRAME_TTY (f)->output); |
5f5c8ee5 GM |
3195 | windows_or_buffers_changed++; |
3196 | /* Mark all windows as inaccurate, so that every window will have | |
3197 | its redisplay done. */ | |
3198 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
3199 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
3200 | f->garbaged = 0; | |
3201 | return Qnil; | |
3202 | } | |
3203 | ||
3204 | ||
3205 | /* Redraw frame F. This is nothing more than a call to the Lisp | |
3206 | function redraw-frame. */ | |
3207 | ||
3208 | void | |
971de7fb | 3209 | redraw_frame (struct frame *f) |
5f5c8ee5 GM |
3210 | { |
3211 | Lisp_Object frame; | |
3212 | XSETFRAME (frame, f); | |
3213 | Fredraw_frame (frame); | |
3214 | } | |
3215 | ||
3216 | ||
3217 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
7ee72033 | 3218 | doc: /* Clear and redisplay all visible frames. */) |
5842a27b | 3219 | (void) |
5f5c8ee5 GM |
3220 | { |
3221 | Lisp_Object tail, frame; | |
3222 | ||
3223 | FOR_EACH_FRAME (tail, frame) | |
3224 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
3225 | Fredraw_frame (frame); | |
3226 | ||
3227 | return Qnil; | |
3228 | } | |
3229 | ||
3230 | ||
3231 | /* This is used when frame_garbaged is set. Call Fredraw_frame on all | |
3232 | visible frames marked as garbaged. */ | |
3233 | ||
3234 | void | |
971de7fb | 3235 | redraw_garbaged_frames (void) |
5f5c8ee5 GM |
3236 | { |
3237 | Lisp_Object tail, frame; | |
3238 | ||
3239 | FOR_EACH_FRAME (tail, frame) | |
3240 | if (FRAME_VISIBLE_P (XFRAME (frame)) | |
3241 | && FRAME_GARBAGED_P (XFRAME (frame))) | |
3242 | Fredraw_frame (frame); | |
3243 | } | |
3244 | ||
3245 | ||
3246 | \f | |
5f5c8ee5 GM |
3247 | /*********************************************************************** |
3248 | Frame Update | |
3249 | ***********************************************************************/ | |
4588ec20 | 3250 | |
5f5c8ee5 | 3251 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 3252 | |
5f5c8ee5 GM |
3253 | If FORCE_P is non-zero, don't let redisplay be stopped by detecting |
3254 | pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try | |
3255 | scrolling. | |
177c0ea7 | 3256 | |
5f5c8ee5 | 3257 | Value is non-zero if redisplay was stopped due to pending input. */ |
4588ec20 | 3258 | |
5f5c8ee5 | 3259 | int |
971de7fb | 3260 | update_frame (struct frame *f, int force_p, int inhibit_hairy_id_p) |
5f5c8ee5 GM |
3261 | { |
3262 | /* 1 means display has been paused because of pending input. */ | |
3263 | int paused_p; | |
3264 | struct window *root_window = XWINDOW (f->root_window); | |
3265 | ||
a2130dbb KS |
3266 | if (redisplay_dont_pause) |
3267 | force_p = 1; | |
d012c62b | 3268 | #if PERIODIC_PREEMPTION_CHECKING |
a2130dbb KS |
3269 | else if (NILP (Vredisplay_preemption_period)) |
3270 | force_p = 1; | |
3271 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
3272 | { |
3273 | EMACS_TIME tm; | |
3274 | double p = XFLOATINT (Vredisplay_preemption_period); | |
3275 | int sec, usec; | |
3276 | ||
993d4ab6 KS |
3277 | if (detect_input_pending_ignore_squeezables ()) |
3278 | { | |
3279 | paused_p = 1; | |
3280 | goto do_pause; | |
3281 | } | |
3282 | ||
d012c62b KS |
3283 | sec = (int) p; |
3284 | usec = (p - sec) * 1000000; | |
3285 | ||
3286 | EMACS_GET_TIME (tm); | |
3287 | EMACS_SET_SECS_USECS (preemption_period, sec, usec); | |
3288 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
3289 | } | |
3290 | #endif | |
3291 | ||
5f5c8ee5 | 3292 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3293 | { |
5f5c8ee5 GM |
3294 | /* We are working on window matrix basis. All windows whose |
3295 | flag must_be_updated_p is set have to be updated. */ | |
3296 | ||
3297 | /* Record that we are not working on frame matrices. */ | |
3298 | set_frame_matrix_frame (NULL); | |
3299 | ||
3300 | /* Update all windows in the window tree of F, maybe stopping | |
3301 | when pending input is detected. */ | |
3302 | update_begin (f); | |
3303 | ||
3304 | /* Update the menu bar on X frames that don't have toolkit | |
3305 | support. */ | |
3306 | if (WINDOWP (f->menu_bar_window)) | |
3307 | update_window (XWINDOW (f->menu_bar_window), 1); | |
3308 | ||
3309 | /* Update the tool-bar window, if present. */ | |
9ea173e8 | 3310 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3311 | { |
9ea173e8 | 3312 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3313 | |
3314 | /* Update tool-bar window. */ | |
3315 | if (w->must_be_updated_p) | |
4588ec20 | 3316 | { |
153a073c PJ |
3317 | Lisp_Object tem; |
3318 | ||
5f5c8ee5 GM |
3319 | update_window (w, 1); |
3320 | w->must_be_updated_p = 0; | |
3321 | ||
3322 | /* Swap tool-bar strings. We swap because we want to | |
3323 | reuse strings. */ | |
9ea173e8 GM |
3324 | tem = f->current_tool_bar_string; |
3325 | f->current_tool_bar_string = f->desired_tool_bar_string; | |
3326 | f->desired_tool_bar_string = tem; | |
4588ec20 JB |
3327 | } |
3328 | } | |
177c0ea7 | 3329 | |
5f5c8ee5 GM |
3330 | |
3331 | /* Update windows. */ | |
3332 | paused_p = update_window_tree (root_window, force_p); | |
3333 | update_end (f); | |
177c0ea7 | 3334 | |
6b61353c | 3335 | /* This flush is a performance bottleneck under X, |
e581a466 | 3336 | and it doesn't seem to be necessary anyway (in general). |
6b61353c | 3337 | It is necessary when resizing the window with the mouse, or |
e581a466 | 3338 | at least the fringes are not redrawn in a timely manner. ++kfs */ |
6b61353c | 3339 | if (f->force_flush_display_p) |
e581a466 KL |
3340 | { |
3341 | FRAME_RIF (f)->flush_display (f); | |
3342 | f->force_flush_display_p = 0; | |
3343 | } | |
4588ec20 | 3344 | } |
5f5c8ee5 GM |
3345 | else |
3346 | { | |
3347 | /* We are working on frame matrix basis. Set the frame on whose | |
3348 | frame matrix we operate. */ | |
3349 | set_frame_matrix_frame (f); | |
3350 | ||
868dd24b | 3351 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3352 | build_frame_matrix (f); |
177c0ea7 | 3353 | |
868dd24b GM |
3354 | /* Update the display */ |
3355 | update_begin (f); | |
5f5c8ee5 | 3356 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3357 | update_end (f); |
3358 | ||
7d2f1216 | 3359 | if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f)) |
3224dac1 | 3360 | { |
0b0d3e0b KL |
3361 | if (FRAME_TTY (f)->termscript) |
3362 | fflush (FRAME_TTY (f)->termscript); | |
7d2f1216 EZ |
3363 | if (FRAME_TERMCAP_P (f)) |
3364 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3365 | } |
868dd24b | 3366 | |
5f5c8ee5 | 3367 | /* Check window matrices for lost pointers. */ |
2d5912c1 | 3368 | #if GLYPH_DEBUG |
9b0e97aa GM |
3369 | check_window_matrix_pointers (root_window); |
3370 | add_frame_display_history (f, paused_p); | |
3371 | #endif | |
5f5c8ee5 GM |
3372 | } |
3373 | ||
ef1b0ba7 | 3374 | #if PERIODIC_PREEMPTION_CHECKING |
993d4ab6 | 3375 | do_pause: |
ef1b0ba7 | 3376 | #endif |
5f5c8ee5 GM |
3377 | /* Reset flags indicating that a window should be updated. */ |
3378 | set_window_update_flags (root_window, 0); | |
177c0ea7 | 3379 | |
868dd24b | 3380 | display_completed = !paused_p; |
5f5c8ee5 | 3381 | return paused_p; |
4588ec20 | 3382 | } |
5f5c8ee5 GM |
3383 | |
3384 | ||
4588ec20 | 3385 | \f |
5f5c8ee5 GM |
3386 | /************************************************************************ |
3387 | Window-based updates | |
3388 | ************************************************************************/ | |
3389 | ||
3390 | /* Perform updates in window tree rooted at W. FORCE_P non-zero means | |
3391 | don't stop updating when input is pending. */ | |
3392 | ||
3393 | static int | |
971de7fb | 3394 | update_window_tree (struct window *w, int force_p) |
5f5c8ee5 GM |
3395 | { |
3396 | int paused_p = 0; | |
177c0ea7 | 3397 | |
5f5c8ee5 GM |
3398 | while (w && !paused_p) |
3399 | { | |
3400 | if (!NILP (w->hchild)) | |
3401 | paused_p |= update_window_tree (XWINDOW (w->hchild), force_p); | |
3402 | else if (!NILP (w->vchild)) | |
3403 | paused_p |= update_window_tree (XWINDOW (w->vchild), force_p); | |
3404 | else if (w->must_be_updated_p) | |
3405 | paused_p |= update_window (w, force_p); | |
3406 | ||
3407 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3408 | } | |
3409 | ||
3410 | return paused_p; | |
3411 | } | |
3412 | ||
3413 | ||
3414 | /* Update window W if its flag must_be_updated_p is non-zero. If | |
3415 | FORCE_P is non-zero, don't stop updating if input is pending. */ | |
3416 | ||
3417 | void | |
971de7fb | 3418 | update_single_window (struct window *w, int force_p) |
5f5c8ee5 GM |
3419 | { |
3420 | if (w->must_be_updated_p) | |
3421 | { | |
3422 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
3423 | ||
3424 | /* Record that this is not a frame-based redisplay. */ | |
3425 | set_frame_matrix_frame (NULL); | |
3426 | ||
a2130dbb KS |
3427 | if (redisplay_dont_pause) |
3428 | force_p = 1; | |
d012c62b | 3429 | #if PERIODIC_PREEMPTION_CHECKING |
a2130dbb KS |
3430 | else if (NILP (Vredisplay_preemption_period)) |
3431 | force_p = 1; | |
3432 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
3433 | { |
3434 | EMACS_TIME tm; | |
3435 | double p = XFLOATINT (Vredisplay_preemption_period); | |
3436 | int sec, usec; | |
3437 | ||
3438 | sec = (int) p; | |
3439 | usec = (p - sec) * 1000000; | |
3440 | ||
3441 | EMACS_GET_TIME (tm); | |
3442 | EMACS_SET_SECS_USECS (preemption_period, sec, usec); | |
3443 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
3444 | } | |
3445 | #endif | |
3446 | ||
5f5c8ee5 GM |
3447 | /* Update W. */ |
3448 | update_begin (f); | |
3449 | update_window (w, force_p); | |
3450 | update_end (f); | |
4588ec20 | 3451 | |
5f5c8ee5 GM |
3452 | /* Reset flag in W. */ |
3453 | w->must_be_updated_p = 0; | |
3454 | } | |
3455 | } | |
4588ec20 | 3456 | |
93e023fc | 3457 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 3458 | |
408f5064 GM |
3459 | /* Redraw lines from the current matrix of window W that are |
3460 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
3461 | ||
3462 | static void | |
971de7fb | 3463 | redraw_overlapped_rows (struct window *w, int yb) |
408f5064 | 3464 | { |
d8ee7803 | 3465 | int i; |
fa971ac3 | 3466 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3fc809e2 | 3467 | |
408f5064 GM |
3468 | /* If rows overlapping others have been changed, the rows being |
3469 | overlapped have to be redrawn. This won't draw lines that have | |
3470 | already been drawn in update_window_line because overlapped_p in | |
3471 | desired rows is 0, so after row assignment overlapped_p in | |
3472 | current rows is 0. */ | |
3473 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
3474 | { | |
e876ff42 | 3475 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
3476 | |
3477 | if (!row->enabled_p) | |
3478 | break; | |
3479 | else if (row->mode_line_p) | |
3480 | continue; | |
177c0ea7 | 3481 | |
408f5064 GM |
3482 | if (row->overlapped_p) |
3483 | { | |
3484 | enum glyph_row_area area; | |
177c0ea7 | 3485 | |
408f5064 GM |
3486 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
3487 | { | |
3488 | updated_row = row; | |
3489 | updated_area = area; | |
fa971ac3 KL |
3490 | FRAME_RIF (f)->cursor_to (i, 0, row->y, |
3491 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 3492 | if (row->used[area]) |
fa971ac3 KL |
3493 | FRAME_RIF (f)->write_glyphs (row->glyphs[area], |
3494 | row->used[area]); | |
3495 | FRAME_RIF (f)->clear_end_of_line (-1); | |
408f5064 | 3496 | } |
177c0ea7 | 3497 | |
408f5064 GM |
3498 | row->overlapped_p = 0; |
3499 | } | |
3500 | ||
e876ff42 | 3501 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
3502 | break; |
3503 | } | |
3504 | } | |
3505 | ||
3506 | ||
3507 | /* Redraw lines from the current matrix of window W that overlap | |
3508 | others. YB is bottom-most y-position in W. */ | |
3509 | ||
3510 | static void | |
971de7fb | 3511 | redraw_overlapping_rows (struct window *w, int yb) |
408f5064 GM |
3512 | { |
3513 | int i, bottom_y; | |
3514 | struct glyph_row *row; | |
fa971ac3 | 3515 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
3fc809e2 | 3516 | |
408f5064 GM |
3517 | for (i = 0; i < w->current_matrix->nrows; ++i) |
3518 | { | |
3519 | row = w->current_matrix->rows + i; | |
3520 | ||
3521 | if (!row->enabled_p) | |
3522 | break; | |
3523 | else if (row->mode_line_p) | |
3524 | continue; | |
177c0ea7 | 3525 | |
408f5064 GM |
3526 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
3527 | ||
b4b2c2ca | 3528 | if (row->overlapping_p) |
408f5064 | 3529 | { |
41124e06 YM |
3530 | int overlaps = 0; |
3531 | ||
b4b2c2ca | 3532 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) && i > 0 |
41124e06 YM |
3533 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) |
3534 | overlaps |= OVERLAPS_PRED; | |
b4b2c2ca | 3535 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) && bottom_y < yb |
41124e06 YM |
3536 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) |
3537 | overlaps |= OVERLAPS_SUCC; | |
3538 | ||
3539 | if (overlaps) | |
3540 | { | |
3541 | if (row->used[LEFT_MARGIN_AREA]) | |
3542 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
3543 | ||
3544 | if (row->used[TEXT_AREA]) | |
3545 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
3546 | ||
3547 | if (row->used[RIGHT_MARGIN_AREA]) | |
3548 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
3549 | ||
3550 | /* Record in neighbour rows that ROW overwrites part of | |
3551 | their display. */ | |
3552 | if (overlaps & OVERLAPS_PRED) | |
3553 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
3554 | if (overlaps & OVERLAPS_SUCC) | |
3555 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
3556 | } | |
408f5064 GM |
3557 | } |
3558 | ||
3559 | if (bottom_y >= yb) | |
3560 | break; | |
3561 | } | |
3562 | } | |
3563 | ||
93e023fc KS |
3564 | #endif /* HAVE_WINDOW_SYSTEM */ |
3565 | ||
408f5064 | 3566 | |
93962bfa GM |
3567 | #ifdef GLYPH_DEBUG |
3568 | ||
3569 | /* Check that no row in the current matrix of window W is enabled | |
3570 | which is below what's displayed in the window. */ | |
3571 | ||
3572 | void | |
971de7fb | 3573 | check_current_matrix_flags (struct window *w) |
93962bfa GM |
3574 | { |
3575 | int last_seen_p = 0; | |
3576 | int i, yb = window_text_bottom_y (w); | |
3577 | ||
3578 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
3579 | { | |
3580 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
3581 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3582 | last_seen_p = 1; | |
3583 | else if (last_seen_p && row->enabled_p) | |
3584 | abort (); | |
3585 | } | |
3586 | } | |
3587 | ||
3588 | #endif /* GLYPH_DEBUG */ | |
3589 | ||
3590 | ||
5f5c8ee5 GM |
3591 | /* Update display of window W. FORCE_P non-zero means that we should |
3592 | not stop when detecting pending input. */ | |
3593 | ||
3594 | static int | |
971de7fb | 3595 | update_window (struct window *w, int force_p) |
4588ec20 | 3596 | { |
5f5c8ee5 GM |
3597 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
3598 | int paused_p; | |
d012c62b | 3599 | #if !PERIODIC_PREEMPTION_CHECKING |
5f5c8ee5 | 3600 | int preempt_count = baud_rate / 2400 + 1; |
d012c62b | 3601 | #endif |
597cfb3f | 3602 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
b96fd3e8 | 3603 | #if GLYPH_DEBUG |
5f5c8ee5 | 3604 | /* Check that W's frame doesn't have glyph matrices. */ |
82f4a138 | 3605 | xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 3606 | #endif |
5f5c8ee5 GM |
3607 | |
3608 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb KS |
3609 | #if !PERIODIC_PREEMPTION_CHECKING |
3610 | if (!force_p) | |
a2d5fca0 | 3611 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3612 | #endif |
4588ec20 | 3613 | |
5f5c8ee5 GM |
3614 | /* If forced to complete the update, or if no input is pending, do |
3615 | the update. */ | |
8fd9a666 | 3616 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 3617 | { |
5f5c8ee5 GM |
3618 | struct glyph_row *row, *end; |
3619 | struct glyph_row *mode_line_row; | |
56974e03 | 3620 | struct glyph_row *header_line_row; |
e87b8809 | 3621 | int yb, changed_p = 0, mouse_face_overwritten_p = 0, n_updated; |
5f5c8ee5 GM |
3622 | |
3623 | rif->update_window_begin_hook (w); | |
3624 | yb = window_text_bottom_y (w); | |
3625 | ||
153a073c PJ |
3626 | /* If window has a header line, update it before everything else. |
3627 | Adjust y-positions of other rows by the header line height. */ | |
5f5c8ee5 GM |
3628 | row = desired_matrix->rows; |
3629 | end = row + desired_matrix->nrows - 1; | |
177c0ea7 | 3630 | |
5f5c8ee5 | 3631 | if (row->mode_line_p) |
56974e03 GM |
3632 | { |
3633 | header_line_row = row; | |
3634 | ++row; | |
3635 | } | |
3636 | else | |
3637 | header_line_row = NULL; | |
5f5c8ee5 GM |
3638 | |
3639 | /* Update the mode line, if necessary. */ | |
3640 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
3641 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
3642 | { | |
3643 | mode_line_row->y = yb; | |
3644 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
3645 | desired_matrix), |
3646 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3647 | } |
3648 | ||
3649 | /* Find first enabled row. Optimizations in redisplay_internal | |
3650 | may lead to an update with only one row enabled. There may | |
3651 | be also completely empty matrices. */ | |
3652 | while (row < end && !row->enabled_p) | |
3653 | ++row; | |
177c0ea7 | 3654 | |
bfdcafe1 | 3655 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 3656 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
3657 | { |
3658 | int rc = scrolling_window (w, header_line_row != NULL); | |
3659 | if (rc < 0) | |
3660 | { | |
3661 | /* All rows were found to be equal. */ | |
3662 | paused_p = 0; | |
3663 | goto set_cursor; | |
3664 | } | |
3665 | else if (rc > 0) | |
6b61353c KH |
3666 | { |
3667 | /* We've scrolled the display. */ | |
3668 | force_p = 1; | |
3669 | changed_p = 1; | |
3670 | } | |
5f5c8ee5 GM |
3671 | } |
3672 | ||
3673 | /* Update the rest of the lines. */ | |
e87b8809 | 3674 | for (n_updated = 0; row < end && (force_p || !input_pending); ++row) |
b7412313 | 3675 | if (row->enabled_p) |
5f5c8ee5 GM |
3676 | { |
3677 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
3678 | int i; | |
177c0ea7 | 3679 | |
153a073c | 3680 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
3681 | detect_input_pending. If it's done too often, |
3682 | scrolling large windows with repeated scroll-up | |
3683 | commands will too quickly pause redisplay. */ | |
d012c62b KS |
3684 | #if PERIODIC_PREEMPTION_CHECKING |
3685 | if (!force_p) | |
3686 | { | |
3687 | EMACS_TIME tm, dif; | |
3688 | EMACS_GET_TIME (tm); | |
3689 | EMACS_SUB_TIME (dif, preemption_next_check, tm); | |
3690 | if (EMACS_TIME_NEG_P (dif)) | |
3691 | { | |
3692 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
3693 | if (detect_input_pending_ignore_squeezables ()) |
3694 | break; | |
d012c62b KS |
3695 | } |
3696 | } | |
3697 | #else | |
e87b8809 | 3698 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 3699 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3700 | #endif |
e876ff42 GM |
3701 | changed_p |= update_window_line (w, vpos, |
3702 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3703 | |
3704 | /* Mark all rows below the last visible one in the current | |
3705 | matrix as invalid. This is necessary because of | |
3706 | variable line heights. Consider the case of three | |
3707 | successive redisplays, where the first displays 5 | |
3708 | lines, the second 3 lines, and the third 5 lines again. | |
3709 | If the second redisplay wouldn't mark rows in the | |
3710 | current matrix invalid, the third redisplay might be | |
3711 | tempted to optimize redisplay based on lines displayed | |
3712 | in the first redisplay. */ | |
3713 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3714 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
3715 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
3716 | } | |
3717 | ||
3718 | /* Was display preempted? */ | |
3719 | paused_p = row < end; | |
177c0ea7 | 3720 | |
56974e03 | 3721 | set_cursor: |
177c0ea7 | 3722 | |
6b61353c KH |
3723 | /* Update the header line after scrolling because a new header |
3724 | line would otherwise overwrite lines at the top of the window | |
3725 | that can be scrolled. */ | |
3726 | if (header_line_row && header_line_row->enabled_p) | |
3727 | { | |
3728 | header_line_row->y = 0; | |
3729 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
6b61353c KH |
3730 | } |
3731 | ||
153a073c | 3732 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
3733 | if (!paused_p && !w->pseudo_window_p) |
3734 | { | |
93e023fc | 3735 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
3736 | if (changed_p && rif->fix_overlapping_area) |
3737 | { | |
3738 | redraw_overlapped_rows (w, yb); | |
3739 | redraw_overlapping_rows (w, yb); | |
3740 | } | |
93e023fc | 3741 | #endif |
177c0ea7 | 3742 | |
5f5c8ee5 GM |
3743 | /* Make cursor visible at cursor position of W. */ |
3744 | set_window_cursor_after_update (w); | |
3745 | ||
e876ff42 GM |
3746 | #if 0 /* Check that current matrix invariants are satisfied. This is |
3747 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
3748 | IF_DEBUG (check_matrix_invariants (w)); |
3749 | #endif | |
4588ec20 | 3750 | } |
5f5c8ee5 GM |
3751 | |
3752 | #if GLYPH_DEBUG | |
3753 | /* Remember the redisplay method used to display the matrix. */ | |
3754 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
3755 | #endif | |
408f5064 | 3756 | |
6b61353c KH |
3757 | #ifdef HAVE_WINDOW_SYSTEM |
3758 | update_window_fringes (w, 0); | |
3759 | #endif | |
3760 | ||
56974e03 GM |
3761 | /* End the update of window W. Don't set the cursor if we |
3762 | paused updating the display because in this case, | |
3763 | set_window_cursor_after_update hasn't been called, and | |
3764 | output_cursor doesn't contain the cursor location. */ | |
3765 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); | |
4588ec20 | 3766 | } |
5f5c8ee5 GM |
3767 | else |
3768 | paused_p = 1; | |
3769 | ||
2d5912c1 | 3770 | #if GLYPH_DEBUG |
0cffd9d8 | 3771 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
3772 | add_window_display_history (w, w->current_matrix->method, paused_p); |
3773 | #endif | |
177c0ea7 | 3774 | |
5f5c8ee5 | 3775 | clear_glyph_matrix (desired_matrix); |
408f5064 | 3776 | |
5f5c8ee5 | 3777 | return paused_p; |
4588ec20 JB |
3778 | } |
3779 | ||
b64b3980 | 3780 | |
5f5c8ee5 GM |
3781 | /* Update the display of area AREA in window W, row number VPOS. |
3782 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
3783 | ||
3784 | static void | |
971de7fb | 3785 | update_marginal_area (struct window *w, int area, int vpos) |
b64b3980 | 3786 | { |
5f5c8ee5 | 3787 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 3788 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
3789 | |
3790 | /* Let functions in xterm.c know what area subsequent X positions | |
3791 | will be relative to. */ | |
3792 | updated_area = area; | |
3793 | ||
3794 | /* Set cursor to start of glyphs, write them, and clear to the end | |
3795 | of the area. I don't think that something more sophisticated is | |
3796 | necessary here, since marginal areas will not be the default. */ | |
3797 | rif->cursor_to (vpos, 0, desired_row->y, 0); | |
3798 | if (desired_row->used[area]) | |
3799 | rif->write_glyphs (desired_row->glyphs[area], desired_row->used[area]); | |
3800 | rif->clear_end_of_line (-1); | |
b64b3980 | 3801 | } |
23b0200c | 3802 | |
352f1545 | 3803 | |
408f5064 GM |
3804 | /* Update the display of the text area of row VPOS in window W. |
3805 | Value is non-zero if display has changed. */ | |
5f5c8ee5 | 3806 | |
408f5064 | 3807 | static int |
971de7fb | 3808 | update_text_area (struct window *w, int vpos) |
23b0200c | 3809 | { |
5f5c8ee5 GM |
3810 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
3811 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3812 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 3813 | int changed_p = 0; |
5f5c8ee5 GM |
3814 | |
3815 | /* Let functions in xterm.c know what area subsequent X positions | |
3816 | will be relative to. */ | |
3817 | updated_area = TEXT_AREA; | |
177c0ea7 | 3818 | |
5f5c8ee5 GM |
3819 | /* If rows are at different X or Y, or rows have different height, |
3820 | or the current row is marked invalid, write the entire line. */ | |
3821 | if (!current_row->enabled_p | |
3822 | || desired_row->y != current_row->y | |
3823 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
3824 | || desired_row->phys_ascent != current_row->phys_ascent |
3825 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 3826 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 3827 | || current_row->overlapped_p |
fee8b690 CY |
3828 | /* This next line is necessary for correctly redrawing |
3829 | mouse-face areas after scrolling and other operations. | |
3830 | However, it causes excessive flickering when mouse is moved | |
3831 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
3832 | line doesn't seem to hurt anything. -- cyd. |
3833 | But it is still needed for the header line. -- kfs. */ | |
3834 | || (current_row->mouse_face_p | |
3835 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
3836 | || current_row->x != desired_row->x) |
3837 | { | |
3838 | rif->cursor_to (vpos, 0, desired_row->y, desired_row->x); | |
177c0ea7 | 3839 | |
5f5c8ee5 GM |
3840 | if (desired_row->used[TEXT_AREA]) |
3841 | rif->write_glyphs (desired_row->glyphs[TEXT_AREA], | |
3842 | desired_row->used[TEXT_AREA]); | |
177c0ea7 | 3843 | |
5f5c8ee5 GM |
3844 | /* Clear to end of window. */ |
3845 | rif->clear_end_of_line (-1); | |
408f5064 | 3846 | changed_p = 1; |
60f2f3f1 GM |
3847 | |
3848 | /* This erases the cursor. We do this here because | |
3849 | notice_overwritten_cursor cannot easily check this, which | |
3850 | might indicate that the whole functionality of | |
3851 | notice_overwritten_cursor would better be implemented here. | |
3852 | On the other hand, we need notice_overwritten_cursor as long | |
3853 | as mouse highlighting is done asynchronously outside of | |
3854 | redisplay. */ | |
3855 | if (vpos == w->phys_cursor.vpos) | |
3856 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
3857 | } |
3858 | else | |
3859 | { | |
3860 | int stop, i, x; | |
3861 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
3862 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
e47306e6 | 3863 | int overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 3864 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
91d227d9 | 3865 | int abort_skipping = 0; |
5f5c8ee5 | 3866 | |
78897758 YM |
3867 | /* If the desired row extends its face to the text area end, and |
3868 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
3869 | make sure we write at least one glyph, so that the face |
3870 | extension actually takes place. */ | |
78897758 YM |
3871 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
3872 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
3873 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
3874 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 3875 | --desired_stop_pos; |
177c0ea7 | 3876 | |
5f5c8ee5 GM |
3877 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
3878 | i = 0; | |
3879 | x = desired_row->x; | |
8399f8a0 GM |
3880 | |
3881 | /* Loop over glyphs that current and desired row may have | |
3882 | in common. */ | |
5f5c8ee5 | 3883 | while (i < stop) |
352f1545 | 3884 | { |
91d227d9 | 3885 | int can_skip_p = !abort_skipping; |
177c0ea7 | 3886 | |
5f5c8ee5 | 3887 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
3888 | don't have to be written. We can't skip if the last |
3889 | current glyph overlaps the glyph to its right. For | |
3890 | example, consider a current row of `if ' with the `f' in | |
3891 | Courier bold so that it overlaps the ` ' to its right. | |
3892 | If the desired row is ` ', we would skip over the space | |
3893 | after the `if' and there would remain a pixel from the | |
3894 | `f' on the screen. */ | |
3895 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 3896 | { |
e47306e6 GM |
3897 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
3898 | int left, right; | |
177c0ea7 | 3899 | |
e47306e6 GM |
3900 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
3901 | &left, &right); | |
91d227d9 | 3902 | can_skip_p = (right == 0 && !abort_skipping); |
352f1545 | 3903 | } |
177c0ea7 | 3904 | |
6d950f4c | 3905 | if (can_skip_p) |
352f1545 | 3906 | { |
91d227d9 CY |
3907 | int start_hpos = i; |
3908 | ||
6d950f4c GM |
3909 | while (i < stop |
3910 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
3911 | { | |
3912 | x += desired_glyph->pixel_width; | |
3913 | ++desired_glyph, ++current_glyph, ++i; | |
3914 | } | |
3915 | ||
3916 | /* Consider the case that the current row contains "xxx | |
3917 | ppp ggg" in italic Courier font, and the desired row | |
3918 | is "xxx ggg". The character `p' has lbearing, `g' | |
3919 | has not. The loop above will stop in front of the | |
3920 | first `p' in the current row. If we would start | |
3921 | writing glyphs there, we wouldn't erase the lbearing | |
3922 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 3923 | taken care of by draw_glyphs. */ |
6d950f4c GM |
3924 | if (overlapping_glyphs_p |
3925 | && i > 0 | |
3926 | && i < current_row->used[TEXT_AREA] | |
3927 | && (current_row->used[TEXT_AREA] | |
3928 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 3929 | { |
6d950f4c | 3930 | int left, right; |
177c0ea7 | 3931 | |
6d950f4c GM |
3932 | rif->get_glyph_overhangs (current_glyph, XFRAME (w->frame), |
3933 | &left, &right); | |
3934 | while (left > 0 && i > 0) | |
3935 | { | |
3936 | --i, --desired_glyph, --current_glyph; | |
3937 | x -= desired_glyph->pixel_width; | |
3938 | left -= desired_glyph->pixel_width; | |
3939 | } | |
91d227d9 CY |
3940 | |
3941 | /* Abort the skipping algorithm if we end up before | |
3942 | our starting point, to avoid looping (bug#1070). | |
3943 | This can happen when the lbearing is larger than | |
3944 | the pixel width. */ | |
3945 | abort_skipping = (i < start_hpos); | |
5f5c8ee5 | 3946 | } |
352f1545 | 3947 | } |
177c0ea7 | 3948 | |
5f5c8ee5 GM |
3949 | /* Try to avoid writing the entire rest of the desired row |
3950 | by looking for a resync point. This mainly prevents | |
3951 | mode line flickering in the case the mode line is in | |
3952 | fixed-pitch font, which it usually will be. */ | |
3953 | if (i < desired_row->used[TEXT_AREA]) | |
3954 | { | |
3955 | int start_x = x, start_hpos = i; | |
3956 | struct glyph *start = desired_glyph; | |
3957 | int current_x = x; | |
6d950f4c GM |
3958 | int skip_first_p = !can_skip_p; |
3959 | ||
5f5c8ee5 GM |
3960 | /* Find the next glyph that's equal again. */ |
3961 | while (i < stop | |
6d950f4c GM |
3962 | && (skip_first_p |
3963 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
3964 | && x == current_x) |
3965 | { | |
3966 | x += desired_glyph->pixel_width; | |
3967 | current_x += current_glyph->pixel_width; | |
3968 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 3969 | skip_first_p = 0; |
5f5c8ee5 | 3970 | } |
23b0200c | 3971 | |
5f5c8ee5 GM |
3972 | if (i == start_hpos || x != current_x) |
3973 | { | |
3974 | i = start_hpos; | |
3975 | x = start_x; | |
3976 | desired_glyph = start; | |
3977 | break; | |
3978 | } | |
e47306e6 | 3979 | |
5f5c8ee5 GM |
3980 | rif->cursor_to (vpos, start_hpos, desired_row->y, start_x); |
3981 | rif->write_glyphs (start, i - start_hpos); | |
408f5064 | 3982 | changed_p = 1; |
5f5c8ee5 GM |
3983 | } |
3984 | } | |
177c0ea7 | 3985 | |
5f5c8ee5 GM |
3986 | /* Write the rest. */ |
3987 | if (i < desired_row->used[TEXT_AREA]) | |
3988 | { | |
3989 | rif->cursor_to (vpos, i, desired_row->y, x); | |
3990 | rif->write_glyphs (desired_glyph, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 3991 | changed_p = 1; |
5f5c8ee5 | 3992 | } |
177c0ea7 | 3993 | |
5f5c8ee5 GM |
3994 | /* Maybe clear to end of line. */ |
3995 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
3996 | { | |
3997 | /* If new row extends to the end of the text area, nothing | |
3998 | has to be cleared, if and only if we did a write_glyphs | |
3999 | above. This is made sure by setting desired_stop_pos | |
4000 | appropriately above. */ | |
78897758 YM |
4001 | xassert (i < desired_row->used[TEXT_AREA] |
4002 | || ((desired_row->used[TEXT_AREA] | |
4003 | == current_row->used[TEXT_AREA]) | |
4004 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
4005 | } |
4006 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
4007 | { | |
4008 | /* If old row extends to the end of the text area, clear. */ | |
4009 | if (i >= desired_row->used[TEXT_AREA]) | |
4010 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 4011 | desired_row->pixel_width); |
5f5c8ee5 | 4012 | rif->clear_end_of_line (-1); |
408f5064 | 4013 | changed_p = 1; |
5f5c8ee5 GM |
4014 | } |
4015 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 4016 | { |
5f5c8ee5 GM |
4017 | /* Otherwise clear to the end of the old row. Everything |
4018 | after that position should be clear already. */ | |
4019 | int x; | |
177c0ea7 | 4020 | |
5f5c8ee5 GM |
4021 | if (i >= desired_row->used[TEXT_AREA]) |
4022 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 4023 | desired_row->pixel_width); |
5f5c8ee5 GM |
4024 | |
4025 | /* If cursor is displayed at the end of the line, make sure | |
4026 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
4027 | with which to erase the cursor (because this method | |
4028 | doesn't work with lbearing/rbearing), so we must do it | |
4029 | this way. */ | |
4030 | if (vpos == w->phys_cursor.vpos | |
f951a506 EZ |
4031 | && (desired_row->reversed_p |
4032 | ? (w->phys_cursor.hpos < 0) | |
4033 | : (w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]))) | |
5f5c8ee5 GM |
4034 | { |
4035 | w->phys_cursor_on_p = 0; | |
4036 | x = -1; | |
4037 | } | |
4038 | else | |
6b61353c | 4039 | x = current_row->pixel_width; |
5f5c8ee5 | 4040 | rif->clear_end_of_line (x); |
408f5064 | 4041 | changed_p = 1; |
2e8907d3 | 4042 | } |
23b0200c | 4043 | } |
408f5064 GM |
4044 | |
4045 | return changed_p; | |
23b0200c | 4046 | } |
4588ec20 | 4047 | |
5f5c8ee5 | 4048 | |
408f5064 GM |
4049 | /* Update row VPOS in window W. Value is non-zero if display has been |
4050 | changed. */ | |
5f5c8ee5 | 4051 | |
408f5064 | 4052 | static int |
971de7fb | 4053 | update_window_line (struct window *w, int vpos, int *mouse_face_overwritten_p) |
5f5c8ee5 GM |
4054 | { |
4055 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
4056 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 4057 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 4058 | int changed_p = 0; |
5f5c8ee5 | 4059 | |
5f5c8ee5 GM |
4060 | /* Set the row being updated. This is important to let xterm.c |
4061 | know what line height values are in effect. */ | |
4062 | updated_row = desired_row; | |
4063 | ||
177c0ea7 JB |
4064 | /* A row can be completely invisible in case a desired matrix was |
4065 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
4066 | the matrix. Make sure to make such rows current anyway, since |
4067 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
4068 | if (desired_row->mode_line_p |
4069 | || desired_row->visible_height > 0) | |
408f5064 | 4070 | { |
504805ac GM |
4071 | xassert (desired_row->enabled_p); |
4072 | ||
4073 | /* Update display of the left margin area, if there is one. */ | |
4074 | if (!desired_row->full_width_p | |
7df02016 | 4075 | && !NILP (w->left_margin_cols)) |
504805ac GM |
4076 | { |
4077 | changed_p = 1; | |
4078 | update_marginal_area (w, LEFT_MARGIN_AREA, vpos); | |
4079 | } | |
177c0ea7 | 4080 | |
504805ac GM |
4081 | /* Update the display of the text area. */ |
4082 | if (update_text_area (w, vpos)) | |
4083 | { | |
4084 | changed_p = 1; | |
4085 | if (current_row->mouse_face_p) | |
4086 | *mouse_face_overwritten_p = 1; | |
4087 | } | |
177c0ea7 | 4088 | |
504805ac GM |
4089 | /* Update display of the right margin area, if there is one. */ |
4090 | if (!desired_row->full_width_p | |
7df02016 | 4091 | && !NILP (w->right_margin_cols)) |
504805ac GM |
4092 | { |
4093 | changed_p = 1; | |
4094 | update_marginal_area (w, RIGHT_MARGIN_AREA, vpos); | |
4095 | } | |
177c0ea7 | 4096 | |
504805ac GM |
4097 | /* Draw truncation marks etc. */ |
4098 | if (!current_row->enabled_p | |
4099 | || desired_row->y != current_row->y | |
4100 | || desired_row->visible_height != current_row->visible_height | |
6b61353c | 4101 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 4102 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
6b61353c | 4103 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 4104 | || desired_row->mode_line_p != current_row->mode_line_p |
6b61353c | 4105 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
4106 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
4107 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
4108 | rif->after_update_window_line_hook (desired_row); | |
408f5064 | 4109 | } |
177c0ea7 | 4110 | |
5f5c8ee5 GM |
4111 | /* Update current_row from desired_row. */ |
4112 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
4113 | updated_row = NULL; | |
408f5064 | 4114 | return changed_p; |
5f5c8ee5 GM |
4115 | } |
4116 | ||
4117 | ||
4118 | /* Set the cursor after an update of window W. This function may only | |
4119 | be called from update_window. */ | |
4120 | ||
4121 | static void | |
971de7fb | 4122 | set_window_cursor_after_update (struct window *w) |
4588ec20 | 4123 | { |
5f5c8ee5 | 4124 | struct frame *f = XFRAME (w->frame); |
fa971ac3 | 4125 | struct redisplay_interface *rif = FRAME_RIF (f); |
5f5c8ee5 GM |
4126 | int cx, cy, vpos, hpos; |
4127 | ||
4128 | /* Not intended for frame matrix updates. */ | |
4129 | xassert (FRAME_WINDOW_P (f)); | |
177c0ea7 | 4130 | |
b96fd3e8 GM |
4131 | if (cursor_in_echo_area |
4132 | && !NILP (echo_area_buffer[0]) | |
4133 | /* If we are showing a message instead of the mini-buffer, | |
4134 | show the cursor for the message instead. */ | |
4135 | && XWINDOW (minibuf_window) == w | |
4136 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
4137 | /* These cases apply only to the frame that contains |
4138 | the active mini-buffer window. */ | |
4139 | && FRAME_HAS_MINIBUF_P (f) | |
4140 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
4141 | { | |
4142 | cx = cy = vpos = hpos = 0; | |
4143 | ||
4144 | if (cursor_in_echo_area >= 0) | |
4145 | { | |
4146 | /* If the mini-buffer is several lines high, find the last | |
4147 | line that has any text on it. Note: either all lines | |
4148 | are enabled or none. Otherwise we wouldn't be able to | |
4149 | determine Y. */ | |
862b4790 GM |
4150 | struct glyph_row *row, *last_row; |
4151 | struct glyph *glyph; | |
4152 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 4153 | |
862b4790 | 4154 | last_row = NULL; |
6206f8ce GM |
4155 | row = w->current_matrix->rows; |
4156 | while (row->enabled_p | |
4157 | && (last_row == NULL | |
4158 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 4159 | { |
862b4790 GM |
4160 | if (row->used[TEXT_AREA] |
4161 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
4162 | last_row = row; | |
6206f8ce | 4163 | ++row; |
862b4790 | 4164 | } |
177c0ea7 | 4165 | |
5f5c8ee5 GM |
4166 | if (last_row) |
4167 | { | |
6206f8ce GM |
4168 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
4169 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 4170 | |
b96fd3e8 | 4171 | while (last > start && last->charpos < 0) |
862b4790 | 4172 | --last; |
177c0ea7 | 4173 | |
862b4790 GM |
4174 | for (glyph = start; glyph < last; ++glyph) |
4175 | { | |
4176 | cx += glyph->pixel_width; | |
4177 | ++hpos; | |
4178 | } | |
4179 | ||
5f5c8ee5 | 4180 | cy = last_row->y; |
862b4790 | 4181 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
4182 | } |
4183 | } | |
4184 | } | |
4185 | else | |
4186 | { | |
4187 | cx = w->cursor.x; | |
4188 | cy = w->cursor.y; | |
4189 | hpos = w->cursor.hpos; | |
4190 | vpos = w->cursor.vpos; | |
4191 | } | |
4588ec20 | 4192 | |
5f5c8ee5 | 4193 | /* Window cursor can be out of sync for horizontally split windows. */ |
f951a506 | 4194 | hpos = max (-1, hpos); /* -1 is for when cursor is on the left fringe */ |
5f5c8ee5 GM |
4195 | hpos = min (w->current_matrix->matrix_w - 1, hpos); |
4196 | vpos = max (0, vpos); | |
4197 | vpos = min (w->current_matrix->nrows - 1, vpos); | |
4198 | rif->cursor_to (vpos, hpos, cy, cx); | |
4588ec20 | 4199 | } |
4588ec20 | 4200 | |
5f5c8ee5 | 4201 | |
6df5d75f GM |
4202 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window |
4203 | tree rooted at W. */ | |
4204 | ||
4205 | void | |
971de7fb | 4206 | set_window_update_flags (struct window *w, int on_p) |
6df5d75f GM |
4207 | { |
4208 | while (w) | |
4209 | { | |
4210 | if (!NILP (w->hchild)) | |
4211 | set_window_update_flags (XWINDOW (w->hchild), on_p); | |
4212 | else if (!NILP (w->vchild)) | |
4213 | set_window_update_flags (XWINDOW (w->vchild), on_p); | |
4214 | else | |
4215 | w->must_be_updated_p = on_p; | |
4216 | ||
4217 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
4218 | } | |
177c0ea7 | 4219 | } |
6df5d75f GM |
4220 | |
4221 | ||
4222 | \f | |
4223 | /*********************************************************************** | |
4224 | Window-Based Scrolling | |
4225 | ***********************************************************************/ | |
4226 | ||
4227 | /* Structure describing rows in scrolling_window. */ | |
4228 | ||
4229 | struct row_entry | |
4230 | { | |
4231 | /* Number of occurrences of this row in desired and current matrix. */ | |
4232 | int old_uses, new_uses; | |
177c0ea7 | 4233 | |
6df5d75f GM |
4234 | /* Vpos of row in new matrix. */ |
4235 | int new_line_number; | |
4236 | ||
4237 | /* Bucket index of this row_entry in the hash table row_table. */ | |
4238 | int bucket; | |
177c0ea7 | 4239 | |
6df5d75f GM |
4240 | /* The row described by this entry. */ |
4241 | struct glyph_row *row; | |
177c0ea7 | 4242 | |
6df5d75f GM |
4243 | /* Hash collision chain. */ |
4244 | struct row_entry *next; | |
4245 | }; | |
4246 | ||
4247 | /* A pool to allocate row_entry structures from, and the size of the | |
4248 | pool. The pool is reallocated in scrolling_window when we find | |
4249 | that we need a larger one. */ | |
4250 | ||
4251 | static struct row_entry *row_entry_pool; | |
4252 | static int row_entry_pool_size; | |
4253 | ||
4254 | /* Index of next free entry in row_entry_pool. */ | |
4255 | ||
4256 | static int row_entry_idx; | |
4257 | ||
4258 | /* The hash table used during scrolling, and the table's size. This | |
4259 | table is used to quickly identify equal rows in the desired and | |
4260 | current matrix. */ | |
4261 | ||
4262 | static struct row_entry **row_table; | |
4263 | static int row_table_size; | |
4264 | ||
4265 | /* Vectors of pointers to row_entry structures belonging to the | |
4266 | current and desired matrix, and the size of the vectors. */ | |
4267 | ||
4268 | static struct row_entry **old_lines, **new_lines; | |
4269 | static int old_lines_size, new_lines_size; | |
4270 | ||
4271 | /* A pool to allocate run structures from, and its size. */ | |
4272 | ||
4273 | static struct run *run_pool; | |
4274 | static int runs_size; | |
4275 | ||
4276 | /* A vector of runs of lines found during scrolling. */ | |
4277 | ||
4278 | static struct run **runs; | |
4279 | ||
6df5d75f GM |
4280 | /* Add glyph row ROW to the scrolling hash table during the scrolling |
4281 | of window W. */ | |
4282 | ||
4283 | static INLINE struct row_entry * | |
971de7fb | 4284 | add_row_entry (struct window *w, struct glyph_row *row) |
6df5d75f GM |
4285 | { |
4286 | struct row_entry *entry; | |
4287 | int i = row->hash % row_table_size; | |
177c0ea7 | 4288 | |
6df5d75f | 4289 | entry = row_table[i]; |
e4e0bee9 | 4290 | while (entry && !row_equal_p (w, entry->row, row, 1)) |
6df5d75f | 4291 | entry = entry->next; |
177c0ea7 | 4292 | |
6df5d75f GM |
4293 | if (entry == NULL) |
4294 | { | |
4295 | entry = row_entry_pool + row_entry_idx++; | |
4296 | entry->row = row; | |
4297 | entry->old_uses = entry->new_uses = 0; | |
4298 | entry->new_line_number = 0; | |
4299 | entry->bucket = i; | |
4300 | entry->next = row_table[i]; | |
4301 | row_table[i] = entry; | |
4302 | } | |
4303 | ||
4304 | return entry; | |
4305 | } | |
4306 | ||
4307 | ||
5f5c8ee5 | 4308 | /* Try to reuse part of the current display of W by scrolling lines. |
153a073c | 4309 | HEADER_LINE_P non-zero means W has a header line. |
5f5c8ee5 GM |
4310 | |
4311 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4312 | Technique for Isolating Differences Between Files." It should take | |
4313 | O(N) time. | |
4314 | ||
4315 | A short outline of the steps of the algorithm | |
4316 | ||
4317 | 1. Skip lines equal at the start and end of both matrices. | |
4318 | ||
4319 | 2. Enter rows in the current and desired matrix into a symbol | |
4320 | table, counting how often they appear in both matrices. | |
4321 | ||
4322 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4323 | i.e. we assume that such lines are likely to have been moved. | |
4324 | ||
4325 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4326 | forward and backward. | |
4327 | ||
4328 | Value is | |
4329 | ||
4330 | -1 if all rows were found to be equal. | |
4331 | 0 to indicate that we did not scroll the display, or | |
4332 | 1 if we did scroll. */ | |
4333 | ||
4334 | static int | |
971de7fb | 4335 | scrolling_window (struct window *w, int header_line_p) |
4588ec20 | 4336 | { |
5f5c8ee5 GM |
4337 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4338 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4339 | int yb = window_text_bottom_y (w); | |
6df5d75f GM |
4340 | int i, j, first_old, first_new, last_old, last_new; |
4341 | int nruns, nbytes, n, run_idx; | |
4342 | struct row_entry *entry; | |
fa971ac3 | 4343 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4344 | |
4345 | /* Skip over rows equal at the start. */ | |
bfdcafe1 | 4346 | for (i = header_line_p ? 1 : 0; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4347 | { |
bfdcafe1 GM |
4348 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4349 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4350 | ||
4351 | if (c->enabled_p | |
4352 | && d->enabled_p | |
6b61353c | 4353 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4354 | && c->y == d->y |
4355 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4356 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
4357 | && row_equal_p (w, c, d, 1)) | |
4358 | { | |
4359 | assign_row (c, d); | |
4360 | d->enabled_p = 0; | |
4361 | } | |
4362 | else | |
4363 | break; | |
5f5c8ee5 | 4364 | } |
4588ec20 | 4365 | |
5f5c8ee5 GM |
4366 | /* Give up if some rows in the desired matrix are not enabled. */ |
4367 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4368 | return -1; | |
177c0ea7 | 4369 | |
5f5c8ee5 GM |
4370 | first_old = first_new = i; |
4371 | ||
4372 | /* Set last_new to the index + 1 of the last enabled row in the | |
4373 | desired matrix. */ | |
4374 | i = first_new + 1; | |
4375 | while (i < desired_matrix->nrows - 1 | |
4376 | && MATRIX_ROW (desired_matrix, i)->enabled_p | |
6df5d75f | 4377 | && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)) <= yb) |
5f5c8ee5 GM |
4378 | ++i; |
4379 | ||
4380 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4381 | return 0; | |
4382 | ||
4383 | last_new = i; | |
4384 | ||
4385 | /* Set last_old to the index + 1 of the last enabled row in the | |
4386 | current matrix. We don't look at the enabled flag here because | |
4387 | we plan to reuse part of the display even if other parts are | |
4388 | disabled. */ | |
4389 | i = first_old + 1; | |
93962bfa GM |
4390 | while (i < current_matrix->nrows - 1) |
4391 | { | |
4392 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4393 | if (bottom <= yb) | |
4394 | ++i; | |
4395 | if (bottom >= yb) | |
4396 | break; | |
4397 | } | |
4398 | ||
5f5c8ee5 GM |
4399 | last_old = i; |
4400 | ||
4401 | /* Skip over rows equal at the bottom. */ | |
4402 | i = last_new; | |
4403 | j = last_old; | |
4404 | while (i - 1 > first_new | |
4405 | && j - 1 > first_old | |
4406 | && MATRIX_ROW (current_matrix, i - 1)->enabled_p | |
4407 | && (MATRIX_ROW (current_matrix, i - 1)->y | |
4408 | == MATRIX_ROW (desired_matrix, j - 1)->y) | |
6b61353c | 4409 | && !MATRIX_ROW (desired_matrix, j - 1)->redraw_fringe_bitmaps_p |
5f5c8ee5 GM |
4410 | && row_equal_p (w, |
4411 | MATRIX_ROW (desired_matrix, i - 1), | |
e4e0bee9 | 4412 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
4413 | --i, --j; |
4414 | last_new = i; | |
4415 | last_old = j; | |
4416 | ||
4417 | /* Nothing to do if all rows are equal. */ | |
4418 | if (last_new == first_new) | |
4419 | return 0; | |
4420 | ||
6df5d75f | 4421 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 4422 | |
6df5d75f GM |
4423 | if (current_matrix->nrows > old_lines_size) |
4424 | { | |
4425 | old_lines_size = current_matrix->nrows; | |
4426 | nbytes = old_lines_size * sizeof *old_lines; | |
4427 | old_lines = (struct row_entry **) xrealloc (old_lines, nbytes); | |
4428 | } | |
177c0ea7 | 4429 | |
6df5d75f GM |
4430 | if (desired_matrix->nrows > new_lines_size) |
4431 | { | |
4432 | new_lines_size = desired_matrix->nrows; | |
4433 | nbytes = new_lines_size * sizeof *new_lines; | |
4434 | new_lines = (struct row_entry **) xrealloc (new_lines, nbytes); | |
4435 | } | |
4436 | ||
4437 | n = desired_matrix->nrows + current_matrix->nrows; | |
4438 | if (3 * n > row_table_size) | |
4439 | { | |
4440 | row_table_size = next_almost_prime (3 * n); | |
4441 | nbytes = row_table_size * sizeof *row_table; | |
4442 | row_table = (struct row_entry **) xrealloc (row_table, nbytes); | |
72af86bd | 4443 | memset (row_table, 0, nbytes); |
6df5d75f GM |
4444 | } |
4445 | ||
4446 | if (n > row_entry_pool_size) | |
4447 | { | |
4448 | row_entry_pool_size = n; | |
4449 | nbytes = row_entry_pool_size * sizeof *row_entry_pool; | |
4450 | row_entry_pool = (struct row_entry *) xrealloc (row_entry_pool, nbytes); | |
4451 | } | |
4452 | ||
4453 | if (desired_matrix->nrows > runs_size) | |
4454 | { | |
4455 | runs_size = desired_matrix->nrows; | |
4456 | nbytes = runs_size * sizeof *runs; | |
4457 | runs = (struct run **) xrealloc (runs, nbytes); | |
4458 | nbytes = runs_size * sizeof *run_pool; | |
4459 | run_pool = (struct run *) xrealloc (run_pool, nbytes); | |
4460 | } | |
4461 | ||
4462 | nruns = run_idx = 0; | |
4463 | row_entry_idx = 0; | |
4464 | ||
4465 | /* Add rows from the current and desired matrix to the hash table | |
4466 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 4467 | |
5f5c8ee5 GM |
4468 | for (i = first_old; i < last_old; ++i) |
4469 | { | |
4470 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
4471 | { | |
6df5d75f GM |
4472 | entry = add_row_entry (w, MATRIX_ROW (current_matrix, i)); |
4473 | old_lines[i] = entry; | |
4474 | ++entry->old_uses; | |
5f5c8ee5 GM |
4475 | } |
4476 | else | |
6df5d75f | 4477 | old_lines[i] = NULL; |
5f5c8ee5 GM |
4478 | } |
4479 | ||
5f5c8ee5 GM |
4480 | for (i = first_new; i < last_new; ++i) |
4481 | { | |
4482 | xassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); | |
6df5d75f GM |
4483 | entry = add_row_entry (w, MATRIX_ROW (desired_matrix, i)); |
4484 | ++entry->new_uses; | |
4485 | entry->new_line_number = i; | |
4486 | new_lines[i] = entry; | |
5f5c8ee5 | 4487 | } |
4588ec20 | 4488 | |
5f5c8ee5 GM |
4489 | /* Identify moves based on lines that are unique and equal |
4490 | in both matrices. */ | |
4491 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
4492 | if (old_lines[i] |
4493 | && old_lines[i]->old_uses == 1 | |
4494 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 GM |
4495 | { |
4496 | int j, k; | |
6df5d75f GM |
4497 | int new_line = old_lines[i]->new_line_number; |
4498 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
4499 | |
4500 | /* Record move. */ | |
4501 | run->current_vpos = i; | |
4502 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
4503 | run->desired_vpos = new_line; | |
4504 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
4505 | run->nrows = 1; | |
4506 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
4507 | ||
4508 | /* Extend backward. */ | |
4509 | j = i - 1; | |
4510 | k = new_line - 1; | |
4511 | while (j > first_old | |
4512 | && k > first_new | |
6df5d75f | 4513 | && old_lines[j] == new_lines[k]) |
5f5c8ee5 GM |
4514 | { |
4515 | int h = MATRIX_ROW (current_matrix, j)->height; | |
177c0ea7 JB |
4516 | --run->current_vpos; |
4517 | --run->desired_vpos; | |
5f5c8ee5 GM |
4518 | ++run->nrows; |
4519 | run->height += h; | |
4520 | run->desired_y -= h; | |
4521 | run->current_y -= h; | |
4522 | --j, --k; | |
4523 | } | |
4588ec20 | 4524 | |
5f5c8ee5 GM |
4525 | /* Extend forward. */ |
4526 | j = i + 1; | |
4527 | k = new_line + 1; | |
4528 | while (j < last_old | |
4529 | && k < last_new | |
6df5d75f | 4530 | && old_lines[j] == new_lines[k]) |
5f5c8ee5 GM |
4531 | { |
4532 | int h = MATRIX_ROW (current_matrix, j)->height; | |
177c0ea7 | 4533 | ++run->nrows; |
5f5c8ee5 GM |
4534 | run->height += h; |
4535 | ++j, ++k; | |
4536 | } | |
19dff8dc | 4537 | |
5f5c8ee5 GM |
4538 | /* Insert run into list of all runs. Order runs by copied |
4539 | pixel lines. Note that we record runs that don't have to | |
4540 | be copied because they are already in place. This is done | |
4541 | because we can avoid calling update_window_line in this | |
4542 | case. */ | |
4543 | for (j = 0; j < nruns && runs[j]->height > run->height; ++j) | |
4544 | ; | |
2b4ec4d7 | 4545 | for (k = nruns; k > j; --k) |
5f5c8ee5 GM |
4546 | runs[k] = runs[k - 1]; |
4547 | runs[j] = run; | |
4548 | ++nruns; | |
4549 | ||
4550 | i += run->nrows; | |
4551 | } | |
4552 | else | |
4553 | ++i; | |
4588ec20 | 4554 | |
5f5c8ee5 GM |
4555 | /* Do the moves. Do it in a way that we don't overwrite something |
4556 | we want to copy later on. This is not solvable in general | |
4557 | because there is only one display and we don't have a way to | |
4558 | exchange areas on this display. Example: | |
4588ec20 | 4559 | |
5f5c8ee5 GM |
4560 | +-----------+ +-----------+ |
4561 | | A | | B | | |
4562 | +-----------+ --> +-----------+ | |
4563 | | B | | A | | |
4564 | +-----------+ +-----------+ | |
4588ec20 | 4565 | |
5f5c8ee5 GM |
4566 | Instead, prefer bigger moves, and invalidate moves that would |
4567 | copy from where we copied to. */ | |
ea0d86af | 4568 | |
5f5c8ee5 GM |
4569 | for (i = 0; i < nruns; ++i) |
4570 | if (runs[i]->nrows > 0) | |
4571 | { | |
4572 | struct run *r = runs[i]; | |
24e86043 | 4573 | |
5f5c8ee5 GM |
4574 | /* Copy on the display. */ |
4575 | if (r->current_y != r->desired_y) | |
4576 | { | |
4577 | rif->scroll_run_hook (w, r); | |
4578 | ||
4579 | /* Invalidate runs that copy from where we copied to. */ | |
4580 | for (j = i + 1; j < nruns; ++j) | |
4581 | { | |
4582 | struct run *p = runs[j]; | |
177c0ea7 | 4583 | |
5f5c8ee5 GM |
4584 | if ((p->current_y >= r->desired_y |
4585 | && p->current_y < r->desired_y + r->height) | |
4586 | || (p->current_y + p->height >= r->desired_y | |
4587 | && (p->current_y + p->height | |
4588 | < r->desired_y + r->height))) | |
4589 | p->nrows = 0; | |
4590 | } | |
4591 | } | |
ea0d86af | 4592 | |
5f5c8ee5 GM |
4593 | /* Assign matrix rows. */ |
4594 | for (j = 0; j < r->nrows; ++j) | |
4595 | { | |
4596 | struct glyph_row *from, *to; | |
408f5064 | 4597 | int to_overlapped_p; |
e876ff42 | 4598 | |
5f5c8ee5 GM |
4599 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
4600 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 4601 | to_overlapped_p = to->overlapped_p; |
6b61353c KH |
4602 | if (!from->mode_line_p && !w->pseudo_window_p |
4603 | && (to->left_fringe_bitmap != from->left_fringe_bitmap | |
4604 | || to->right_fringe_bitmap != from->right_fringe_bitmap | |
4605 | || to->left_fringe_face_id != from->left_fringe_face_id | |
4606 | || to->right_fringe_face_id != from->right_fringe_face_id | |
3d4a365f | 4607 | || to->overlay_arrow_bitmap != from->overlay_arrow_bitmap)) |
6b61353c | 4608 | from->redraw_fringe_bitmaps_p = 1; |
5f5c8ee5 GM |
4609 | assign_row (to, from); |
4610 | to->enabled_p = 1, from->enabled_p = 0; | |
408f5064 | 4611 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
4612 | } |
4613 | } | |
15874c59 | 4614 | |
6df5d75f GM |
4615 | /* Clear the hash table, for the next time. */ |
4616 | for (i = 0; i < row_entry_idx; ++i) | |
4617 | row_table[row_entry_pool[i].bucket] = NULL; | |
4618 | ||
6b61353c KH |
4619 | /* Value is > 0 to indicate that we scrolled the display. */ |
4620 | return nruns; | |
5f5c8ee5 | 4621 | } |
de83c314 | 4622 | |
15874c59 | 4623 | |
4588ec20 | 4624 | \f |
5f5c8ee5 GM |
4625 | /************************************************************************ |
4626 | Frame-Based Updates | |
4627 | ************************************************************************/ | |
4588ec20 | 4628 | |
5f5c8ee5 | 4629 | /* Update the desired frame matrix of frame F. |
4588ec20 | 4630 | |
5f5c8ee5 GM |
4631 | FORCE_P non-zero means that the update should not be stopped by |
4632 | pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling | |
4633 | should not be tried. | |
4634 | ||
4635 | Value is non-zero if update was stopped due to pending input. */ | |
4636 | ||
4637 | static int | |
971de7fb | 4638 | update_frame_1 (struct frame *f, int force_p, int inhibit_id_p) |
4588ec20 | 4639 | { |
5f5c8ee5 GM |
4640 | /* Frame matrices to work on. */ |
4641 | struct glyph_matrix *current_matrix = f->current_matrix; | |
4642 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
4643 | int i; | |
4588ec20 JB |
4644 | int pause; |
4645 | int preempt_count = baud_rate / 2400 + 1; | |
5f5c8ee5 GM |
4646 | |
4647 | xassert (current_matrix && desired_matrix); | |
4588ec20 | 4648 | |
c37e4889 RS |
4649 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
4650 | calculate_costs (f); | |
4651 | ||
d88c2b9e RS |
4652 | if (preempt_count <= 0) |
4653 | preempt_count = 1; | |
4654 | ||
a2130dbb KS |
4655 | #if !PERIODIC_PREEMPTION_CHECKING |
4656 | if (!force_p && detect_input_pending_ignore_squeezables ()) | |
4588ec20 JB |
4657 | { |
4658 | pause = 1; | |
4659 | goto do_pause; | |
4660 | } | |
d012c62b | 4661 | #endif |
4588ec20 | 4662 | |
5f5c8ee5 | 4663 | /* If we cannot insert/delete lines, it's no use trying it. */ |
daf01701 | 4664 | if (!FRAME_LINE_INS_DEL_OK (f)) |
5f5c8ee5 | 4665 | inhibit_id_p = 1; |
7098a0fa | 4666 | |
efb859b4 | 4667 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
4668 | i/d line if just want cursor motion. */ |
4669 | for (i = 0; i < desired_matrix->nrows; i++) | |
4670 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
4671 | break; |
4672 | ||
4673 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
4674 | if (!inhibit_id_p && i < desired_matrix->nrows) |
4675 | force_p |= scrolling (f); | |
4588ec20 JB |
4676 | |
4677 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
4678 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
4679 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 4680 | |
5f5c8ee5 GM |
4681 | /* Now update the rest of the lines. */ |
4682 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 4683 | { |
5f5c8ee5 | 4684 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 4685 | { |
b6a65ac2 | 4686 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
4687 | { |
4688 | /* Flush out every so many lines. | |
4689 | Also flush out if likely to have more than 1k buffered | |
4690 | otherwise. I'm told that some telnet connections get | |
4691 | really screwed by more than 1k output at once. */ | |
fced92f1 CY |
4692 | FILE *display_output = FRAME_TTY (f)->output; |
4693 | if (display_output) | |
4588ec20 | 4694 | { |
fced92f1 CY |
4695 | int outq = PENDING_OUTPUT_COUNT (display_output); |
4696 | if (outq > 900 | |
4697 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
4588ec20 | 4698 | { |
fced92f1 CY |
4699 | fflush (display_output); |
4700 | if (preempt_count == 1) | |
4701 | { | |
a41f8bed | 4702 | #ifdef EMACS_OUTQSIZE |
fced92f1 CY |
4703 | if (EMACS_OUTQSIZE (0, &outq) < 0) |
4704 | /* Probably not a tty. Ignore the error and reset | |
4705 | the outq count. */ | |
4706 | outq = PENDING_OUTPUT_COUNT (FRAME_TTY (f->output)); | |
4588ec20 | 4707 | #endif |
fced92f1 CY |
4708 | outq *= 10; |
4709 | if (baud_rate <= outq && baud_rate > 0) | |
4710 | sleep (outq / baud_rate); | |
4711 | } | |
4588ec20 JB |
4712 | } |
4713 | } | |
4588ec20 JB |
4714 | } |
4715 | ||
d012c62b KS |
4716 | #if PERIODIC_PREEMPTION_CHECKING |
4717 | if (!force_p) | |
4718 | { | |
4719 | EMACS_TIME tm, dif; | |
4720 | EMACS_GET_TIME (tm); | |
4721 | EMACS_SUB_TIME (dif, preemption_next_check, tm); | |
4722 | if (EMACS_TIME_NEG_P (dif)) | |
4723 | { | |
4724 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
4725 | if (detect_input_pending_ignore_squeezables ()) |
4726 | break; | |
d012c62b KS |
4727 | } |
4728 | } | |
4729 | #else | |
4730 | if (!force_p && (i - 1) % preempt_count == 0) | |
a2d5fca0 | 4731 | detect_input_pending_ignore_squeezables (); |
d012c62b | 4732 | #endif |
a2960116 | 4733 | |
5f5c8ee5 | 4734 | update_frame_line (f, i); |
4588ec20 | 4735 | } |
4588ec20 | 4736 | } |
177c0ea7 | 4737 | |
7df02016 | 4738 | pause = (i < FRAME_LINES (f) - 1) ? i : 0; |
4588ec20 JB |
4739 | |
4740 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
4741 | if (!pause) | |
4742 | { | |
48cf7030 | 4743 | if ((cursor_in_echo_area |
5f5c8ee5 | 4744 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 4745 | show the cursor for the message instead of for the |
5f5c8ee5 | 4746 | (now hidden) mini-buffer contents. */ |
2577053b RS |
4747 | || (EQ (minibuf_window, selected_window) |
4748 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 4749 | && !NILP (echo_area_buffer[0]))) |
2577053b | 4750 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 4751 | the active mini-buffer window. */ |
2577053b | 4752 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 4753 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 4754 | { |
7df02016 | 4755 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
4756 | int row, col; |
4757 | ||
4758 | if (cursor_in_echo_area < 0) | |
4759 | { | |
5f5c8ee5 GM |
4760 | /* Negative value of cursor_in_echo_area means put |
4761 | cursor at beginning of line. */ | |
648fa17d JB |
4762 | row = top; |
4763 | col = 0; | |
4764 | } | |
1113d9db | 4765 | else |
648fa17d | 4766 | { |
5f5c8ee5 GM |
4767 | /* Positive value of cursor_in_echo_area means put |
4768 | cursor at the end of the prompt. If the mini-buffer | |
4769 | is several lines high, find the last line that has | |
4770 | any text on it. */ | |
7df02016 | 4771 | row = FRAME_LINES (f); |
177c0ea7 | 4772 | do |
648fa17d | 4773 | { |
5f5c8ee5 GM |
4774 | --row; |
4775 | col = 0; | |
177c0ea7 | 4776 | |
5f5c8ee5 GM |
4777 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
4778 | { | |
4779 | /* Frame rows are filled up with spaces that | |
4780 | must be ignored here. */ | |
5f5c8ee5 GM |
4781 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
4782 | row); | |
4783 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
4784 | struct glyph *last = start + r->used[TEXT_AREA]; | |
4785 | ||
4786 | while (last > start | |
4787 | && (last - 1)->charpos < 0) | |
4788 | --last; | |
177c0ea7 | 4789 | |
5f5c8ee5 GM |
4790 | col = last - start; |
4791 | } | |
648fa17d JB |
4792 | } |
4793 | while (row > top && col == 0); | |
4794 | ||
6395da5c | 4795 | /* Make sure COL is not out of range. */ |
868e640e | 4796 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 4797 | { |
6395da5c | 4798 | /* If we have another row, advance cursor into it. */ |
7df02016 | 4799 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 4800 | { |
7df02016 | 4801 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
4802 | row++; |
4803 | } | |
4804 | /* Otherwise move it back in range. */ | |
4805 | else | |
868e640e | 4806 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
4807 | } |
4808 | } | |
4809 | ||
385ed61f | 4810 | cursor_to (f, row, col); |
1113d9db | 4811 | } |
4588ec20 | 4812 | else |
5f5c8ee5 GM |
4813 | { |
4814 | /* We have only one cursor on terminal frames. Use it to | |
4815 | display the cursor of the selected window. */ | |
4816 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
4817 | if (w->cursor.vpos >= 0 |
4818 | /* The cursor vpos may be temporarily out of bounds | |
4819 | in the following situation: There is one window, | |
4820 | with the cursor in the lower half of it. The window | |
4821 | is split, and a message causes a redisplay before | |
4822 | a new cursor position has been computed. */ | |
7df02016 | 4823 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
4824 | { |
4825 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
4826 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
4827 | ||
7df02016 KS |
4828 | if (INTEGERP (w->left_margin_cols)) |
4829 | x += XFASTINT (w->left_margin_cols); | |
177c0ea7 | 4830 | |
7df02016 | 4831 | /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */ |
385ed61f | 4832 | cursor_to (f, y, x); |
5f5c8ee5 GM |
4833 | } |
4834 | } | |
4588ec20 JB |
4835 | } |
4836 | ||
ef1b0ba7 | 4837 | #if !PERIODIC_PREEMPTION_CHECKING |
4588ec20 | 4838 | do_pause: |
ef1b0ba7 | 4839 | #endif |
4588ec20 | 4840 | |
5f5c8ee5 | 4841 | clear_desired_matrices (f); |
4588ec20 JB |
4842 | return pause; |
4843 | } | |
4844 | ||
4588ec20 | 4845 | |
5f5c8ee5 | 4846 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 4847 | |
dfcf069d | 4848 | int |
971de7fb | 4849 | scrolling (struct frame *frame) |
4588ec20 JB |
4850 | { |
4851 | int unchanged_at_top, unchanged_at_bottom; | |
4852 | int window_size; | |
4853 | int changed_lines; | |
7df02016 KS |
4854 | int *old_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); |
4855 | int *new_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4856 | int *draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4857 | int *old_draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 4858 | register int i; |
7df02016 | 4859 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
4860 | struct glyph_matrix *current_matrix = frame->current_matrix; |
4861 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 4862 | |
5f5c8ee5 GM |
4863 | if (!current_matrix) |
4864 | abort (); | |
4588ec20 | 4865 | |
5f5c8ee5 GM |
4866 | /* Compute hash codes of all the lines. Also calculate number of |
4867 | changed lines, number of unchanged lines at the beginning, and | |
4868 | number of unchanged lines at the end. */ | |
4588ec20 JB |
4869 | changed_lines = 0; |
4870 | unchanged_at_top = 0; | |
7df02016 KS |
4871 | unchanged_at_bottom = FRAME_LINES (frame); |
4872 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
4873 | { |
4874 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 4875 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 4876 | return 0; |
5f5c8ee5 GM |
4877 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
4878 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
4879 | { |
4880 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
4881 | new_hash[i] = old_hash[i]; | |
4882 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
4883 | draw_cost[i] = INFINITY; | |
4884 | } | |
4588ec20 | 4885 | else |
f188b3c4 | 4886 | { |
5f5c8ee5 GM |
4887 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
4888 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 4889 | } |
4588ec20 JB |
4890 | |
4891 | if (old_hash[i] != new_hash[i]) | |
4892 | { | |
4893 | changed_lines++; | |
7df02016 | 4894 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
4895 | } |
4896 | else if (i == unchanged_at_top) | |
4897 | unchanged_at_top++; | |
5f5c8ee5 | 4898 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
4899 | } |
4900 | ||
4901 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
daf01701 | 4902 | if ((!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4903 | && changed_lines < baud_rate / 2400) |
7df02016 | 4904 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
4905 | return 1; |
4906 | ||
7df02016 | 4907 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
4908 | - unchanged_at_bottom); |
4909 | ||
daf01701 | 4910 | if (FRAME_SCROLL_REGION_OK (frame)) |
4588ec20 | 4911 | free_at_end_vpos -= unchanged_at_bottom; |
daf01701 | 4912 | else if (FRAME_MEMORY_BELOW_FRAME (frame)) |
4588ec20 JB |
4913 | free_at_end_vpos = -1; |
4914 | ||
4915 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 4916 | current frame and desired frame, don't bother with i/d calc. */ |
daf01701 | 4917 | if (!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4918 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
4919 | && (window_size >= |
4920 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 4921 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
4922 | old_hash, new_hash, draw_cost))) |
4923 | return 0; | |
4924 | ||
5f5c8ee5 GM |
4925 | if (window_size < 2) |
4926 | return 0; | |
4927 | ||
502b9b64 | 4928 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 4929 | draw_cost + unchanged_at_top - 1, |
190bb91a | 4930 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
4931 | old_hash + unchanged_at_top - 1, |
4932 | new_hash + unchanged_at_top - 1, | |
4933 | free_at_end_vpos - unchanged_at_top); | |
4934 | ||
4935 | return 0; | |
4936 | } | |
4588ec20 | 4937 | |
4588ec20 | 4938 | |
5f5c8ee5 GM |
4939 | /* Count the number of blanks at the start of the vector of glyphs R |
4940 | which is LEN glyphs long. */ | |
4588ec20 | 4941 | |
4588ec20 | 4942 | static int |
971de7fb | 4943 | count_blanks (struct glyph *r, int len) |
4588ec20 | 4944 | { |
5f5c8ee5 | 4945 | int i; |
177c0ea7 | 4946 | |
5f5c8ee5 GM |
4947 | for (i = 0; i < len; ++i) |
4948 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
4949 | break; | |
4950 | ||
4951 | return i; | |
4588ec20 JB |
4952 | } |
4953 | ||
5f5c8ee5 GM |
4954 | |
4955 | /* Count the number of glyphs in common at the start of the glyph | |
4956 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
4957 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
4958 | ||
4588ec20 | 4959 | static int |
971de7fb | 4960 | count_match (struct glyph *str1, struct glyph *end1, struct glyph *str2, struct glyph *end2) |
4588ec20 | 4961 | { |
5f5c8ee5 GM |
4962 | struct glyph *p1 = str1; |
4963 | struct glyph *p2 = str2; | |
177c0ea7 | 4964 | |
5f5c8ee5 GM |
4965 | while (p1 < end1 |
4966 | && p2 < end2 | |
42186983 | 4967 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 4968 | ++p1, ++p2; |
177c0ea7 | 4969 | |
5f5c8ee5 | 4970 | return p1 - str1; |
4588ec20 JB |
4971 | } |
4972 | ||
5f5c8ee5 | 4973 | |
4588ec20 | 4974 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 4975 | |
7df02016 | 4976 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))]) |
4588ec20 | 4977 | |
5f5c8ee5 GM |
4978 | |
4979 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
4980 | ||
4588ec20 | 4981 | static void |
971de7fb | 4982 | update_frame_line (struct frame *f, int vpos) |
4588ec20 | 4983 | { |
5f5c8ee5 | 4984 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
4985 | int tem; |
4986 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
4987 | struct glyph_matrix *current_matrix = f->current_matrix; |
4988 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
4989 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
4990 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
4991 | int must_write_whole_line_p; | |
daf01701 | 4992 | int write_spaces_p = FRAME_MUST_WRITE_SPACES (f); |
c363a1d6 | 4993 | int colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background |
0a894bad GM |
4994 | != FACE_TTY_DEFAULT_BG_COLOR); |
4995 | ||
4996 | if (colored_spaces_p) | |
4997 | write_spaces_p = 1; | |
5f5c8ee5 | 4998 | |
26c63686 GM |
4999 | /* Current row not enabled means it has unknown contents. We must |
5000 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
5001 | must_write_whole_line_p = !current_row->enabled_p; |
5002 | if (must_write_whole_line_p) | |
4588ec20 | 5003 | { |
5f5c8ee5 | 5004 | obody = 0; |
4588ec20 JB |
5005 | olen = 0; |
5006 | } | |
5007 | else | |
5008 | { | |
5f5c8ee5 GM |
5009 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
5010 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 5011 | |
4cecaab8 MB |
5012 | /* Ignore trailing spaces, if we can. */ |
5013 | if (!write_spaces_p) | |
5014 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
5015 | olen--; | |
4588ec20 JB |
5016 | } |
5017 | ||
5f5c8ee5 GM |
5018 | current_row->enabled_p = 1; |
5019 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 5020 | |
5f5c8ee5 GM |
5021 | /* If desired line is empty, just clear the line. */ |
5022 | if (!desired_row->enabled_p) | |
4588ec20 JB |
5023 | { |
5024 | nlen = 0; | |
5025 | goto just_erase; | |
5026 | } | |
5027 | ||
5f5c8ee5 GM |
5028 | nbody = desired_row->glyphs[TEXT_AREA]; |
5029 | nlen = desired_row->used[TEXT_AREA]; | |
5030 | nend = nbody + nlen; | |
5031 | ||
5032 | /* If display line has unknown contents, write the whole line. */ | |
5033 | if (must_write_whole_line_p) | |
5034 | { | |
26c63686 | 5035 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 5036 | if (!write_spaces_p) |
74ca462f GM |
5037 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
5038 | --nlen; | |
5039 | ||
26c63686 | 5040 | /* Write the contents of the desired line. */ |
74ca462f | 5041 | if (nlen) |
26c63686 | 5042 | { |
385ed61f KL |
5043 | cursor_to (f, vpos, 0); |
5044 | write_glyphs (f, nbody, nlen); | |
26c63686 | 5045 | } |
177c0ea7 | 5046 | |
26c63686 GM |
5047 | /* Don't call clear_end_of_line if we already wrote the whole |
5048 | line. The cursor will not be at the right margin in that | |
5049 | case but in the line below. */ | |
7df02016 | 5050 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 | 5051 | { |
385ed61f KL |
5052 | cursor_to (f, vpos, nlen); |
5053 | clear_end_of_line (f, FRAME_TOTAL_COLS (f)); | |
26c63686 | 5054 | } |
58827478 GM |
5055 | else |
5056 | /* Make sure we are in the right row, otherwise cursor movement | |
5057 | with cmgoto might use `ch' in the wrong row. */ | |
385ed61f | 5058 | cursor_to (f, vpos, 0); |
177c0ea7 | 5059 | |
5f5c8ee5 GM |
5060 | make_current (desired_matrix, current_matrix, vpos); |
5061 | return; | |
5062 | } | |
4588ec20 JB |
5063 | |
5064 | /* Pretend trailing spaces are not there at all, | |
5065 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
5066 | if (!write_spaces_p) |
5067 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
5068 | nlen--; | |
4588ec20 JB |
5069 | |
5070 | /* If there's no i/d char, quickly do the best we can without it. */ | |
daf01701 | 5071 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
4588ec20 | 5072 | { |
5f5c8ee5 | 5073 | int i, j; |
4588ec20 | 5074 | |
5f5c8ee5 GM |
5075 | /* Find the first glyph in desired row that doesn't agree with |
5076 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
5077 | for (i = 0; i < nlen; i++) |
5078 | { | |
5f5c8ee5 | 5079 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 5080 | { |
5f5c8ee5 GM |
5081 | /* Find the end of the run of different glyphs. */ |
5082 | j = i + 1; | |
5083 | while (j < nlen | |
5084 | && (j >= olen | |
5085 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
5086 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
5087 | ++j; | |
177c0ea7 JB |
5088 | |
5089 | /* Output this run of non-matching chars. */ | |
385ed61f KL |
5090 | cursor_to (f, vpos, i); |
5091 | write_glyphs (f, nbody + i, j - i); | |
5f5c8ee5 | 5092 | i = j - 1; |
4588ec20 JB |
5093 | |
5094 | /* Now find the next non-match. */ | |
5095 | } | |
5096 | } | |
5097 | ||
5098 | /* Clear the rest of the line, or the non-clear part of it. */ | |
5099 | if (olen > nlen) | |
5100 | { | |
385ed61f KL |
5101 | cursor_to (f, vpos, nlen); |
5102 | clear_end_of_line (f, olen); | |
4588ec20 JB |
5103 | } |
5104 | ||
5f5c8ee5 GM |
5105 | /* Make current row = desired row. */ |
5106 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
5107 | return; |
5108 | } | |
5109 | ||
5f5c8ee5 GM |
5110 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
5111 | characters in a row. */ | |
5112 | ||
4588ec20 JB |
5113 | if (!olen) |
5114 | { | |
5f5c8ee5 GM |
5115 | /* If current line is blank, skip over initial spaces, if |
5116 | possible, and write the rest. */ | |
4cecaab8 | 5117 | if (write_spaces_p) |
5f5c8ee5 GM |
5118 | nsp = 0; |
5119 | else | |
5120 | nsp = count_blanks (nbody, nlen); | |
5121 | ||
4588ec20 JB |
5122 | if (nlen > nsp) |
5123 | { | |
385ed61f KL |
5124 | cursor_to (f, vpos, nsp); |
5125 | write_glyphs (f, nbody + nsp, nlen - nsp); | |
4588ec20 JB |
5126 | } |
5127 | ||
502b9b64 | 5128 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 5129 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
5130 | return; |
5131 | } | |
5132 | ||
4588ec20 | 5133 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 5134 | osp = count_blanks (obody, olen); |
4cecaab8 | 5135 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 5136 | |
5f5c8ee5 GM |
5137 | /* Compute number of matching chars starting with first non-blank. */ |
5138 | begmatch = count_match (obody + osp, obody + olen, | |
5139 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
5140 | |
5141 | /* Spaces in new match implicit space past the end of old. */ | |
5142 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 5143 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
5144 | { |
5145 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
5146 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
5147 | ++begmatch; | |
4588ec20 JB |
5148 | } |
5149 | ||
5150 | /* Avoid doing insert/delete char | |
5151 | just cause number of leading spaces differs | |
5f5c8ee5 | 5152 | when the following text does not match. */ |
4588ec20 JB |
5153 | if (begmatch == 0 && osp != nsp) |
5154 | osp = nsp = min (osp, nsp); | |
5155 | ||
5156 | /* Find matching characters at end of line */ | |
5157 | op1 = obody + olen; | |
5158 | np1 = nbody + nlen; | |
5159 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
5160 | while (op1 > op2 |
5161 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
5162 | { |
5163 | op1--; | |
5164 | np1--; | |
5165 | } | |
5166 | endmatch = obody + olen - op1; | |
5167 | ||
4588ec20 JB |
5168 | /* tem gets the distance to insert or delete. |
5169 | endmatch is how many characters we save by doing so. | |
5170 | Is it worth it? */ | |
5171 | ||
5172 | tem = (nlen - nsp) - (olen - osp); | |
5173 | if (endmatch && tem | |
daf01701 | 5174 | && (!FRAME_CHAR_INS_DEL_OK (f) |
8a56675d | 5175 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
5176 | endmatch = 0; |
5177 | ||
5178 | /* nsp - osp is the distance to insert or delete. | |
5179 | If that is nonzero, begmatch is known to be nonzero also. | |
5180 | begmatch + endmatch is how much we save by doing the ins/del. | |
5181 | Is it worth it? */ | |
5182 | ||
5183 | if (nsp != osp | |
daf01701 | 5184 | && (!FRAME_CHAR_INS_DEL_OK (f) |
c363a1d6 | 5185 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
5186 | { |
5187 | begmatch = 0; | |
5188 | endmatch = 0; | |
5189 | osp = nsp = min (osp, nsp); | |
5190 | } | |
5191 | ||
5192 | /* Now go through the line, inserting, writing and | |
5193 | deleting as appropriate. */ | |
5194 | ||
5195 | if (osp > nsp) | |
5196 | { | |
385ed61f KL |
5197 | cursor_to (f, vpos, nsp); |
5198 | delete_glyphs (f, osp - nsp); | |
4588ec20 JB |
5199 | } |
5200 | else if (nsp > osp) | |
5201 | { | |
5202 | /* If going to delete chars later in line | |
5203 | and insert earlier in the line, | |
5204 | must delete first to avoid losing data in the insert */ | |
5205 | if (endmatch && nlen < olen + nsp - osp) | |
5206 | { | |
385ed61f KL |
5207 | cursor_to (f, vpos, nlen - endmatch + osp - nsp); |
5208 | delete_glyphs (f, olen + nsp - osp - nlen); | |
4588ec20 JB |
5209 | olen = nlen - (nsp - osp); |
5210 | } | |
385ed61f KL |
5211 | cursor_to (f, vpos, osp); |
5212 | insert_glyphs (f, 0, nsp - osp); | |
4588ec20 JB |
5213 | } |
5214 | olen += nsp - osp; | |
5215 | ||
5216 | tem = nsp + begmatch + endmatch; | |
5217 | if (nlen != tem || olen != tem) | |
5218 | { | |
4588ec20 JB |
5219 | if (!endmatch || nlen == olen) |
5220 | { | |
c363a1d6 GM |
5221 | /* If new text being written reaches right margin, there is |
5222 | no need to do clear-to-eol at the end of this function | |
5223 | (and it would not be safe, since cursor is not going to | |
5224 | be "at the margin" after the text is done). */ | |
7df02016 | 5225 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 5226 | olen = 0; |
c363a1d6 GM |
5227 | |
5228 | /* Function write_glyphs is prepared to do nothing | |
5229 | if passed a length <= 0. Check it here to avoid | |
5230 | unnecessary cursor movement. */ | |
5231 | if (nlen - tem > 0) | |
5232 | { | |
385ed61f KL |
5233 | cursor_to (f, vpos, nsp + begmatch); |
5234 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
c363a1d6 | 5235 | } |
4588ec20 JB |
5236 | } |
5237 | else if (nlen > olen) | |
5238 | { | |
24e86043 KH |
5239 | /* Here, we used to have the following simple code: |
5240 | ---------------------------------------- | |
5241 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
5242 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
5243 | ---------------------------------------- | |
5244 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
5245 | is a padding glyph. */ | |
5246 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
5247 | int del; | |
5f5c8ee5 | 5248 | |
385ed61f | 5249 | cursor_to (f, vpos, nsp + begmatch); |
177c0ea7 | 5250 | |
5f5c8ee5 | 5251 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
5252 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
5253 | out--; | |
385ed61f | 5254 | write_glyphs (f, nbody + nsp + begmatch, out); |
177c0ea7 | 5255 | |
5f5c8ee5 GM |
5256 | /* If we left columns to be overwritten, we must delete them. */ |
5257 | del = olen - tem - out; | |
c363a1d6 | 5258 | if (del > 0) |
385ed61f | 5259 | delete_glyphs (f, del); |
177c0ea7 | 5260 | |
5f5c8ee5 | 5261 | /* At last, we insert columns not yet written out. */ |
385ed61f | 5262 | insert_glyphs (f, nbody + nsp + begmatch + out, nlen - olen + del); |
5f5c8ee5 GM |
5263 | olen = nlen; |
5264 | } | |
5265 | else if (olen > nlen) | |
5266 | { | |
385ed61f KL |
5267 | cursor_to (f, vpos, nsp + begmatch); |
5268 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
5269 | delete_glyphs (f, olen - nlen); | |
5f5c8ee5 GM |
5270 | olen = nlen; |
5271 | } | |
bd9e3e75 | 5272 | } |
5f5c8ee5 GM |
5273 | |
5274 | just_erase: | |
5275 | /* If any unerased characters remain after the new line, erase them. */ | |
5276 | if (olen > nlen) | |
078b3696 | 5277 | { |
385ed61f KL |
5278 | cursor_to (f, vpos, nlen); |
5279 | clear_end_of_line (f, olen); | |
078b3696 | 5280 | } |
5f5c8ee5 GM |
5281 | |
5282 | /* Exchange contents between current_frame and new_frame. */ | |
5283 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5284 | } |
5f5c8ee5 GM |
5285 | |
5286 | ||
078b3696 | 5287 | \f |
5f5c8ee5 GM |
5288 | /*********************************************************************** |
5289 | X/Y Position -> Buffer Position | |
5290 | ***********************************************************************/ | |
5291 | ||
a1b0a6db | 5292 | /* Determine what's under window-relative pixel position (*X, *Y). |
2396cbba | 5293 | Return the OBJECT (string or buffer) that's there. |
6b61353c | 5294 | Return in *POS the position in that object. |
2396cbba EZ |
5295 | Adjust *X and *Y to character positions. |
5296 | Return in *DX and *DY the pixel coordinates of the click, | |
5297 | relative to the top left corner of OBJECT, or relative to | |
5298 | the top left corner of the character glyph at (*X, *Y) | |
5299 | if OBJECT is nil. | |
5300 | Return WIDTH and HEIGHT of the object at (*X, *Y), or zero | |
5301 | if the coordinates point to an empty area of the display. */ | |
5f5c8ee5 | 5302 | |
6b61353c | 5303 | Lisp_Object |
971de7fb | 5304 | buffer_posn_from_coords (struct window *w, int *x, int *y, struct display_pos *pos, Lisp_Object *object, int *dx, int *dy, int *width, int *height) |
4588ec20 | 5305 | { |
5f5c8ee5 | 5306 | struct it it; |
707ea971 | 5307 | Lisp_Object old_current_buffer = Fcurrent_buffer (); |
5f5c8ee5 | 5308 | struct text_pos startp; |
6b61353c KH |
5309 | Lisp_Object string; |
5310 | struct glyph_row *row; | |
cedd7cd9 KS |
5311 | #ifdef HAVE_WINDOW_SYSTEM |
5312 | struct image *img = 0; | |
5313 | #endif | |
2396cbba | 5314 | int x0, x1, to_x; |
5f5c8ee5 | 5315 | |
707ea971 CY |
5316 | /* We used to set current_buffer directly here, but that does the |
5317 | wrong thing with `face-remapping-alist' (bug#2044). */ | |
5318 | Fset_buffer (w->buffer); | |
5f5c8ee5 GM |
5319 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
5320 | CHARPOS (startp) = min (ZV, max (BEGV, CHARPOS (startp))); | |
5321 | BYTEPOS (startp) = min (ZV_BYTE, max (BEGV_BYTE, BYTEPOS (startp))); | |
5322 | start_display (&it, w, startp); | |
177c0ea7 | 5323 | |
9173a8fb | 5324 | x0 = *x; |
2396cbba EZ |
5325 | |
5326 | /* First, move to the beginning of the row corresponding to *Y. We | |
5327 | need to be in that row to get the correct value of base paragraph | |
40629f17 | 5328 | direction for the text at (*X, *Y). */ |
2396cbba EZ |
5329 | move_it_to (&it, -1, 0, *y, -1, MOVE_TO_X | MOVE_TO_Y); |
5330 | ||
5331 | /* TO_X is the pixel position that the iterator will compute for the | |
40629f17 EZ |
5332 | glyph at *X. We add it.first_visible_x because iterator |
5333 | positions include the hscroll. */ | |
2396cbba EZ |
5334 | to_x = x0 + it.first_visible_x; |
5335 | if (it.bidi_it.paragraph_dir == R2L) | |
5336 | /* For lines in an R2L paragraph, we need to mirror TO_X wrt the | |
5337 | text area. This is because the iterator, even in R2L | |
5338 | paragraphs, delivers glyphs as if they started at the left | |
5339 | margin of the window. (When we actually produce glyphs for | |
5340 | display, we reverse their order in PRODUCE_GLYPHS, but the | |
5341 | iterator doesn't know about that.) The following line adjusts | |
5342 | the pixel position to the iterator geometry, which is what | |
40629f17 EZ |
5343 | move_it_* routines use. (The -1 is because in a window whose |
5344 | text-area width is W, the rightmost pixel position is W-1, and | |
5345 | it should be mirrored into zero pixel position.) */ | |
5346 | to_x = window_box_width (w, TEXT_AREA) - to_x - 1; | |
5347 | ||
5348 | /* Now move horizontally in the row to the glyph under *X. Second | |
5349 | argument is ZV to prevent move_it_in_display_line from matching | |
5350 | based on buffer positions. */ | |
2396cbba | 5351 | move_it_in_display_line (&it, ZV, to_x, MOVE_TO_X); |
177c0ea7 | 5352 | |
707ea971 | 5353 | Fset_buffer (old_current_buffer); |
a1b0a6db | 5354 | |
6b61353c KH |
5355 | *dx = x0 + it.first_visible_x - it.current_x; |
5356 | *dy = *y - it.current_y; | |
5357 | ||
5358 | string = w->buffer; | |
5359 | if (STRINGP (it.string)) | |
5360 | string = it.string; | |
a1b0a6db | 5361 | *pos = it.current; |
86282aab KH |
5362 | if (it.what == IT_COMPOSITION |
5363 | && it.cmp_it.nchars > 1 | |
5364 | && it.cmp_it.reversed_p) | |
5365 | { | |
5366 | /* The current display element is a grapheme cluster in a | |
5367 | composition. In that case, we need the position of the first | |
5368 | character of the cluster. But, as it.cmp_it.reversed_p is 1, | |
5369 | it.current points to the last character of the cluster, thus | |
5370 | we must move back to the first character of the same | |
5371 | cluster. */ | |
5372 | CHARPOS (pos->pos) -= it.cmp_it.nchars - 1; | |
5373 | if (STRINGP (it.string)) | |
5374 | BYTEPOS (pos->pos) = string_char_to_byte (string, CHARPOS (pos->pos)); | |
5375 | else | |
5376 | BYTEPOS (pos->pos) = CHAR_TO_BYTE (CHARPOS (pos->pos)); | |
5377 | } | |
6b61353c KH |
5378 | |
5379 | #ifdef HAVE_WINDOW_SYSTEM | |
5380 | if (it.what == IT_IMAGE) | |
5381 | { | |
6b61353c KH |
5382 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5383 | && !NILP (img->spec)) | |
5384 | *object = img->spec; | |
5385 | } | |
5386 | #endif | |
5387 | ||
b70d98e1 KS |
5388 | if (it.vpos < w->current_matrix->nrows |
5389 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5390 | row->enabled_p)) | |
6b61353c KH |
5391 | { |
5392 | if (it.hpos < row->used[TEXT_AREA]) | |
5393 | { | |
5394 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6b61353c | 5395 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5396 | if (img) |
5397 | { | |
5398 | *dy -= row->ascent - glyph->ascent; | |
4be9765d KH |
5399 | *dx += glyph->slice.img.x; |
5400 | *dy += glyph->slice.img.y; | |
cedd7cd9 KS |
5401 | /* Image slices positions are still relative to the entire image */ |
5402 | *width = img->width; | |
5403 | *height = img->height; | |
5404 | } | |
5405 | else | |
6b61353c | 5406 | #endif |
cedd7cd9 KS |
5407 | { |
5408 | *width = glyph->pixel_width; | |
5409 | *height = glyph->ascent + glyph->descent; | |
5410 | } | |
6b61353c KH |
5411 | } |
5412 | else | |
5413 | { | |
5414 | *width = 0; | |
5415 | *height = row->height; | |
5416 | } | |
5417 | } | |
5418 | else | |
5419 | { | |
5420 | *width = *height = 0; | |
5421 | } | |
5422 | ||
5423 | /* Add extra (default width) columns if clicked after EOL. */ | |
5424 | x1 = max(0, it.current_x + it.pixel_width - it.first_visible_x); | |
5425 | if (x0 > x1) | |
5426 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5427 | ||
5428 | *x = it.hpos; | |
5429 | *y = it.vpos; | |
5430 | ||
5431 | return string; | |
5f5c8ee5 | 5432 | } |
4588ec20 | 5433 | |
5f5c8ee5 GM |
5434 | |
5435 | /* Value is the string under window-relative coordinates X/Y in the | |
6b61353c KH |
5436 | mode line or header line (PART says which) of window W, or nil if none. |
5437 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
5438 | |
5439 | Lisp_Object | |
ace1712c EZ |
5440 | mode_line_string (struct window *w, enum window_part part, |
5441 | int *x, int *y, EMACS_INT *charpos, Lisp_Object *object, | |
5442 | int *dx, int *dy, int *width, int *height) | |
5f5c8ee5 GM |
5443 | { |
5444 | struct glyph_row *row; | |
5445 | struct glyph *glyph, *end; | |
6b61353c | 5446 | int x0, y0; |
5f5c8ee5 GM |
5447 | Lisp_Object string = Qnil; |
5448 | ||
641bdbf3 | 5449 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
5450 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
5451 | else | |
045dee35 | 5452 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
6b61353c KH |
5453 | y0 = *y - row->y; |
5454 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
5f5c8ee5 GM |
5455 | |
5456 | if (row->mode_line_p && row->enabled_p) | |
4588ec20 | 5457 | { |
5f5c8ee5 GM |
5458 | /* Find the glyph under X. If we find one with a string object, |
5459 | it's the one we were looking for. */ | |
5460 | glyph = row->glyphs[TEXT_AREA]; | |
5461 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 5462 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5463 | x0 -= glyph->pixel_width; |
5464 | *x = glyph - row->glyphs[TEXT_AREA]; | |
5465 | if (glyph < end) | |
5466 | { | |
5467 | string = glyph->object; | |
5468 | *charpos = glyph->charpos; | |
5469 | *width = glyph->pixel_width; | |
5470 | *height = glyph->ascent + glyph->descent; | |
5471 | #ifdef HAVE_WINDOW_SYSTEM | |
5472 | if (glyph->type == IMAGE_GLYPH) | |
5473 | { | |
5474 | struct image *img; | |
5475 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5476 | if (img != NULL) | |
5477 | *object = img->spec; | |
5478 | y0 -= row->ascent - glyph->ascent; | |
5479 | } | |
5480 | #endif | |
5481 | } | |
5482 | else | |
5483 | { | |
5484 | /* Add extra (default width) columns if clicked after EOL. */ | |
5485 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5486 | *width = 0; | |
5487 | *height = row->height; | |
5488 | } | |
5489 | } | |
5490 | else | |
5491 | { | |
5492 | *x = 0; | |
5493 | x0 = 0; | |
5494 | *width = *height = 0; | |
4588ec20 | 5495 | } |
5f5c8ee5 | 5496 | |
6b61353c KH |
5497 | *dx = x0; |
5498 | *dy = y0; | |
5499 | ||
5f5c8ee5 | 5500 | return string; |
4588ec20 | 5501 | } |
5f5c8ee5 GM |
5502 | |
5503 | ||
db1db309 GM |
5504 | /* Value is the string under window-relative coordinates X/Y in either |
5505 | marginal area, or nil if none. *CHARPOS is set to the position in | |
5506 | the string returned. */ | |
5507 | ||
5508 | Lisp_Object | |
ace1712c EZ |
5509 | marginal_area_string (struct window *w, enum window_part part, |
5510 | int *x, int *y, EMACS_INT *charpos, Lisp_Object *object, | |
5511 | int *dx, int *dy, int *width, int *height) | |
db1db309 GM |
5512 | { |
5513 | struct glyph_row *row = w->current_matrix->rows; | |
5514 | struct glyph *glyph, *end; | |
6b61353c | 5515 | int x0, y0, i, wy = *y; |
641bdbf3 | 5516 | int area; |
db1db309 GM |
5517 | Lisp_Object string = Qnil; |
5518 | ||
641bdbf3 | 5519 | if (part == ON_LEFT_MARGIN) |
db1db309 | 5520 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 5521 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
5522 | area = RIGHT_MARGIN_AREA; |
5523 | else | |
5524 | abort (); | |
5525 | ||
5526 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
5527 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
5528 | break; | |
6b61353c KH |
5529 | y0 = *y - row->y; |
5530 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
db1db309 GM |
5531 | |
5532 | if (row->enabled_p) | |
5533 | { | |
5534 | /* Find the glyph under X. If we find one with a string object, | |
5535 | it's the one we were looking for. */ | |
db1db309 | 5536 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 5537 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5538 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5539 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) |
5540 | + window_box_width (w, LEFT_MARGIN_AREA) | |
5541 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 5542 | else |
7df02016 | 5543 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5544 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5545 | : 0); |
5546 | ||
6b61353c KH |
5547 | glyph = row->glyphs[area]; |
5548 | end = glyph + row->used[area]; | |
cfde341f | 5549 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5550 | x0 -= glyph->pixel_width; |
5551 | *x = glyph - row->glyphs[area]; | |
5552 | if (glyph < end) | |
5553 | { | |
5554 | string = glyph->object; | |
5555 | *charpos = glyph->charpos; | |
5556 | *width = glyph->pixel_width; | |
5557 | *height = glyph->ascent + glyph->descent; | |
5558 | #ifdef HAVE_WINDOW_SYSTEM | |
5559 | if (glyph->type == IMAGE_GLYPH) | |
5560 | { | |
5561 | struct image *img; | |
5562 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5563 | if (img != NULL) | |
5564 | *object = img->spec; | |
5565 | y0 -= row->ascent - glyph->ascent; | |
4be9765d KH |
5566 | x0 += glyph->slice.img.x; |
5567 | y0 += glyph->slice.img.y; | |
6b61353c KH |
5568 | } |
5569 | #endif | |
5570 | } | |
5571 | else | |
5572 | { | |
5573 | /* Add extra (default width) columns if clicked after EOL. */ | |
5574 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5575 | *width = 0; | |
5576 | *height = row->height; | |
5577 | } | |
db1db309 | 5578 | } |
6b61353c KH |
5579 | else |
5580 | { | |
5581 | x0 = 0; | |
5582 | *x = 0; | |
5583 | *width = *height = 0; | |
5584 | } | |
5585 | ||
5586 | *dx = x0; | |
5587 | *dy = y0; | |
db1db309 GM |
5588 | |
5589 | return string; | |
5590 | } | |
5591 | ||
5592 | ||
5f5c8ee5 GM |
5593 | /*********************************************************************** |
5594 | Changing Frame Sizes | |
5595 | ***********************************************************************/ | |
4588ec20 JB |
5596 | |
5597 | #ifdef SIGWINCH | |
5f5c8ee5 | 5598 | |
efb859b4 | 5599 | SIGTYPE |
971de7fb DN |
5600 | window_change_signal (int signalnum) /* If we don't have an argument, */ |
5601 | /* some compilers complain in signal calls. */ | |
4588ec20 JB |
5602 | { |
5603 | int width, height; | |
4588ec20 JB |
5604 | int old_errno = errno; |
5605 | ||
28d7d09f | 5606 | struct tty_display_info *tty; |
4d553a13 | 5607 | |
333f1b6f JD |
5608 | signal (SIGWINCH, window_change_signal); |
5609 | SIGNAL_THREAD_CHECK (signalnum); | |
5610 | ||
9628b887 KL |
5611 | /* The frame size change obviously applies to a single |
5612 | termcap-controlled terminal, but we can't decide which. | |
5613 | Therefore, we resize the frames corresponding to each tty. | |
9628b887 KL |
5614 | */ |
5615 | for (tty = tty_list; tty; tty = tty->next) { | |
4588ec20 | 5616 | |
0a125897 KL |
5617 | if (! tty->term_initted) |
5618 | continue; | |
4588ec20 | 5619 | |
db878925 DN |
5620 | /* Suspended tty frames have tty->input == NULL avoid trying to |
5621 | use it. */ | |
5622 | if (!tty->input) | |
5623 | continue; | |
5624 | ||
0b0d3e0b | 5625 | get_tty_size (fileno (tty->input), &width, &height); |
3fc809e2 | 5626 | |
bedeffcf | 5627 | if (width > 5 && height > 2) { |
9628b887 | 5628 | Lisp_Object tail, frame; |
3fc809e2 | 5629 | |
9628b887 | 5630 | FOR_EACH_FRAME (tail, frame) |
4d553a13 KL |
5631 | if (FRAME_TERMCAP_P (XFRAME (frame)) && FRAME_TTY (XFRAME (frame)) == tty) |
5632 | /* Record the new sizes, but don't reallocate the data | |
5633 | structures now. Let that be done later outside of the | |
5634 | signal handler. */ | |
5635 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); | |
9628b887 | 5636 | } |
4588ec20 | 5637 | } |
3fc809e2 | 5638 | |
4588ec20 JB |
5639 | errno = old_errno; |
5640 | } | |
5641 | #endif /* SIGWINCH */ | |
5642 | ||
5643 | ||
b96fd3e8 GM |
5644 | /* Do any change in frame size that was requested by a signal. SAFE |
5645 | non-zero means this function is called from a place where it is | |
5646 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 5647 | |
dfcf069d | 5648 | void |
971de7fb | 5649 | do_pending_window_change (int safe) |
4588ec20 JB |
5650 | { |
5651 | /* If window_change_signal should have run before, run it now. */ | |
b96fd3e8 GM |
5652 | if (redisplaying_p && !safe) |
5653 | return; | |
177c0ea7 | 5654 | |
4588ec20 JB |
5655 | while (delayed_size_change) |
5656 | { | |
35f56f96 | 5657 | Lisp_Object tail, frame; |
4588ec20 JB |
5658 | |
5659 | delayed_size_change = 0; | |
5660 | ||
35f56f96 | 5661 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5662 | { |
5f5c8ee5 | 5663 | struct frame *f = XFRAME (frame); |
35f56f96 | 5664 | |
7df02016 KS |
5665 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
5666 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
5667 | 0, 0, safe); | |
4588ec20 JB |
5668 | } |
5669 | } | |
5670 | } | |
5671 | ||
5672 | ||
502b9b64 | 5673 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 5674 | indicate no change is to take place. |
4588ec20 | 5675 | |
b6a65ac2 JB |
5676 | If DELAY is non-zero, then assume we're being called from a signal |
5677 | handler, and queue the change for later - perhaps the next | |
5678 | redisplay. Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
5679 | from a signal handler. |
5680 | ||
5681 | SAFE non-zero means this function is called from a place where it's | |
5682 | safe to change frame sizes while a redisplay is in progress. */ | |
b6a65ac2 | 5683 | |
dfcf069d | 5684 | void |
971de7fb | 5685 | change_frame_size (register struct frame *f, int newheight, int newwidth, int pretend, int delay, int safe) |
45140e01 RS |
5686 | { |
5687 | Lisp_Object tail, frame; | |
3826ea1a | 5688 | |
9628b887 | 5689 | if (FRAME_MSDOS_P (f)) |
45140e01 | 5690 | { |
9628b887 KL |
5691 | /* On MS-DOS, all frames use the same screen, so a change in |
5692 | size affects all frames. Termcap now supports multiple | |
5693 | ttys. */ | |
45140e01 | 5694 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 5695 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 5696 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 5697 | pretend, delay, safe); |
45140e01 RS |
5698 | } |
5699 | else | |
b96fd3e8 | 5700 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
5701 | } |
5702 | ||
5703 | static void | |
971de7fb | 5704 | change_frame_size_1 (register struct frame *f, int newheight, int newwidth, int pretend, int delay, int safe) |
4588ec20 | 5705 | { |
7df02016 | 5706 | int new_frame_total_cols; |
aed13378 | 5707 | int count = SPECPDL_INDEX (); |
3826ea1a | 5708 | |
4588ec20 | 5709 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 5710 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 5711 | { |
7df02016 KS |
5712 | f->new_text_lines = newheight; |
5713 | f->new_text_cols = newwidth; | |
4588ec20 JB |
5714 | delayed_size_change = 1; |
5715 | return; | |
5716 | } | |
5717 | ||
502b9b64 | 5718 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
5719 | f->new_text_lines = 0; |
5720 | f->new_text_cols = 0; | |
b6a65ac2 | 5721 | |
08f7aa3e | 5722 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 5723 | if (newheight == 0) |
7df02016 | 5724 | newheight = FRAME_LINES (f); |
ae19c6f2 | 5725 | if (newwidth == 0) |
7df02016 | 5726 | newwidth = FRAME_COLS (f); |
3826ea1a | 5727 | |
5f5c8ee5 GM |
5728 | /* Compute width of windows in F. |
5729 | This is the width of the frame without vertical scroll bars. */ | |
7df02016 | 5730 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); |
3826ea1a | 5731 | |
b6a65ac2 | 5732 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 5733 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 JB |
5734 | |
5735 | /* If we're not changing the frame size, quit now. */ | |
5075d853 JD |
5736 | /* Frame width may be unchanged but the text portion may change, for example, |
5737 | fullscreen and remove/add scroll bar. */ | |
7df02016 | 5738 | if (newheight == FRAME_LINES (f) |
5075d853 JD |
5739 | && newwidth == FRAME_COLS (f) // text portion unchanged |
5740 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) // frame width unchanged | |
4588ec20 JB |
5741 | return; |
5742 | ||
cbb95688 RS |
5743 | BLOCK_INPUT; |
5744 | ||
886a8a6c KH |
5745 | #ifdef MSDOS |
5746 | /* We only can set screen dimensions to certain values supported | |
5747 | by our video hardware. Try to find the smallest size greater | |
5748 | or equal to the requested dimensions. */ | |
5749 | dos_set_window_size (&newheight, &newwidth); | |
5750 | #endif | |
5751 | ||
7df02016 | 5752 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 5753 | { |
5f5c8ee5 | 5754 | if (FRAME_HAS_MINIBUF_P (f) && !FRAME_MINIBUF_ONLY_P (f)) |
4588ec20 | 5755 | { |
5f5c8ee5 | 5756 | /* Frame has both root and mini-buffer. */ |
7df02016 | 5757 | XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f))->top_line, |
5f5c8ee5 GM |
5758 | FRAME_TOP_MARGIN (f)); |
5759 | set_window_height (FRAME_ROOT_WINDOW (f), | |
5760 | (newheight | |
5761 | - 1 | |
5762 | - FRAME_TOP_MARGIN (f)), | |
f8748f0f | 5763 | 2); |
7df02016 | 5764 | XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top_line, |
a5d8b611 | 5765 | newheight - 1); |
5f5c8ee5 | 5766 | set_window_height (FRAME_MINIBUF_WINDOW (f), 1, 0); |
4588ec20 JB |
5767 | } |
5768 | else | |
502b9b64 | 5769 | /* Frame has just one top-level window. */ |
5f5c8ee5 | 5770 | set_window_height (FRAME_ROOT_WINDOW (f), |
f8748f0f | 5771 | newheight - FRAME_TOP_MARGIN (f), 2); |
b6a65ac2 | 5772 | |
48e482e6 EZ |
5773 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5774 | manipulating video hardware. */ | |
5775 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5776 | FrameRows (FRAME_TTY (f)) = newheight; |
4588ec20 JB |
5777 | } |
5778 | ||
7df02016 | 5779 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 5780 | { |
f8748f0f | 5781 | set_window_width (FRAME_ROOT_WINDOW (f), new_frame_total_cols, 2); |
5f5c8ee5 | 5782 | if (FRAME_HAS_MINIBUF_P (f)) |
7df02016 | 5783 | set_window_width (FRAME_MINIBUF_WINDOW (f), new_frame_total_cols, 0); |
4588ec20 | 5784 | |
48e482e6 EZ |
5785 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5786 | manipulating video hardware. */ | |
5787 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5788 | FrameCols (FRAME_TTY (f)) = newwidth; |
5f5c8ee5 | 5789 | |
9ea173e8 | 5790 | if (WINDOWP (f->tool_bar_window)) |
7df02016 | 5791 | XSETFASTINT (XWINDOW (f->tool_bar_window)->total_cols, newwidth); |
4588ec20 JB |
5792 | } |
5793 | ||
7df02016 KS |
5794 | FRAME_LINES (f) = newheight; |
5795 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 5796 | |
5f5c8ee5 GM |
5797 | { |
5798 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
5799 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 5800 | |
5f5c8ee5 GM |
5801 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
5802 | &text_area_height); | |
5803 | if (w->cursor.x >= text_area_x + text_area_width) | |
5804 | w->cursor.hpos = w->cursor.x = 0; | |
5805 | if (w->cursor.y >= text_area_y + text_area_height) | |
5806 | w->cursor.vpos = w->cursor.y = 0; | |
5807 | } | |
986e61b8 | 5808 | |
5f5c8ee5 | 5809 | adjust_glyphs (f); |
5f5c8ee5 | 5810 | calculate_costs (f); |
cb02fa39 GM |
5811 | SET_FRAME_GARBAGED (f); |
5812 | f->resized_p = 1; | |
97cf50e7 RS |
5813 | |
5814 | UNBLOCK_INPUT; | |
61730a69 | 5815 | |
e523f7e5 RS |
5816 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); |
5817 | ||
ef264c42 | 5818 | run_window_configuration_change_hook (f); |
e523f7e5 RS |
5819 | |
5820 | unbind_to (count, Qnil); | |
4588ec20 | 5821 | } |
5f5c8ee5 GM |
5822 | |
5823 | ||
4588ec20 | 5824 | \f |
5f5c8ee5 GM |
5825 | /*********************************************************************** |
5826 | Terminal Related Lisp Functions | |
5827 | ***********************************************************************/ | |
5828 | ||
5829 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 5830 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
5831 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
5832 | FILE = nil means just close any termscript file currently open. */) | |
5842a27b | 5833 | (Lisp_Object file) |
5f5c8ee5 | 5834 | { |
0b0d3e0b KL |
5835 | struct tty_display_info *tty; |
5836 | ||
7d2f1216 EZ |
5837 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ()) |
5838 | && ! FRAME_MSDOS_P (SELECTED_FRAME ())) | |
0b0d3e0b KL |
5839 | error ("Current frame is not on a tty device"); |
5840 | ||
5841 | tty = CURTTY (); | |
5842 | ||
5843 | if (tty->termscript != 0) | |
e18c7093 KL |
5844 | { |
5845 | BLOCK_INPUT; | |
0b0d3e0b | 5846 | fclose (tty->termscript); |
e18c7093 KL |
5847 | UNBLOCK_INPUT; |
5848 | } | |
0b0d3e0b | 5849 | tty->termscript = 0; |
5f5c8ee5 GM |
5850 | |
5851 | if (! NILP (file)) | |
5852 | { | |
5853 | file = Fexpand_file_name (file, Qnil); | |
0b0d3e0b KL |
5854 | tty->termscript = fopen (SDATA (file), "w"); |
5855 | if (tty->termscript == 0) | |
5f5c8ee5 GM |
5856 | report_file_error ("Opening termscript", Fcons (file, Qnil)); |
5857 | } | |
5858 | return Qnil; | |
5859 | } | |
5860 | ||
5861 | ||
4588ec20 | 5862 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
62af879c | 5863 | Ssend_string_to_terminal, 1, 2, 0, |
7ee72033 | 5864 | doc: /* Send STRING to the terminal without alteration. |
62af879c KL |
5865 | Control characters in STRING will have terminal-dependent effects. |
5866 | ||
6ed8eeff | 5867 | Optional parameter TERMINAL specifies the tty terminal device to use. |
558759e4 AM |
5868 | It may be a terminal object, a frame, or nil for the terminal used by |
5869 | the currently selected frame. In batch mode, STRING is sent to stdout | |
5870 | when TERMINAL is nil. */) | |
5842a27b | 5871 | (Lisp_Object string, Lisp_Object terminal) |
4588ec20 | 5872 | { |
7cef7ce3 SM |
5873 | struct terminal *t = get_terminal (terminal, 1); |
5874 | FILE *out; | |
0b0d3e0b | 5875 | |
94f3db62 | 5876 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 5877 | CHECK_STRING (string); |
2c1e4409 | 5878 | BLOCK_INPUT; |
0b0d3e0b | 5879 | |
6ed8eeff KL |
5880 | if (!t) |
5881 | error ("Unknown terminal device"); | |
0b0d3e0b | 5882 | |
7cef7ce3 SM |
5883 | if (t->type == output_initial) |
5884 | out = stdout; | |
5885 | else if (t->type != output_termcap && t->type != output_msdos_raw) | |
5886 | error ("Device %d is not a termcap terminal device", t->id); | |
5887 | else | |
5888 | { | |
5889 | struct tty_display_info *tty = t->display_info.tty; | |
3fc809e2 | 5890 | |
7cef7ce3 SM |
5891 | if (! tty->output) |
5892 | error ("Terminal is currently suspended"); | |
cecfdea6 | 5893 | |
7cef7ce3 SM |
5894 | if (tty->termscript) |
5895 | { | |
5896 | fwrite (SDATA (string), 1, SBYTES (string), tty->termscript); | |
5897 | fflush (tty->termscript); | |
5898 | } | |
5899 | out = tty->output; | |
4588ec20 | 5900 | } |
7cef7ce3 SM |
5901 | fwrite (SDATA (string), 1, SBYTES (string), out); |
5902 | fflush (out); | |
2c1e4409 | 5903 | UNBLOCK_INPUT; |
4588ec20 JB |
5904 | return Qnil; |
5905 | } | |
5906 | ||
5f5c8ee5 | 5907 | |
4588ec20 | 5908 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 5909 | doc: /* Beep, or flash the screen. |
228299fa | 5910 | Also, unless an argument is given, |
7ee72033 | 5911 | terminate any keyboard macro currently executing. */) |
5842a27b | 5912 | (Lisp_Object arg) |
4588ec20 | 5913 | { |
efb859b4 | 5914 | if (!NILP (arg)) |
4588ec20 | 5915 | { |
7fa788da RS |
5916 | if (noninteractive) |
5917 | putchar (07); | |
5918 | else | |
385ed61f | 5919 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5920 | } |
5921 | else | |
5922 | bitch_at_user (); | |
5923 | ||
5924 | return Qnil; | |
5925 | } | |
5926 | ||
dfcf069d | 5927 | void |
971de7fb | 5928 | bitch_at_user (void) |
4588ec20 JB |
5929 | { |
5930 | if (noninteractive) | |
5931 | putchar (07); | |
5f5c8ee5 | 5932 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
4588ec20 JB |
5933 | error ("Keyboard macro terminated by a command ringing the bell"); |
5934 | else | |
385ed61f | 5935 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5936 | } |
5937 | ||
5f5c8ee5 GM |
5938 | |
5939 | \f | |
5940 | /*********************************************************************** | |
5941 | Sleeping, Waiting | |
5942 | ***********************************************************************/ | |
5943 | ||
4588ec20 | 5944 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 5945 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
5946 | SECONDS may be a floating-point value, meaning that you can wait for a |
5947 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
5948 | additional wait period, in milliseconds; this may be useful if your | |
5949 | Emacs was built without floating point support. | |
7ee72033 | 5950 | \(Not all operating systems support waiting for a fraction of a second.) */) |
5842a27b | 5951 | (Lisp_Object seconds, Lisp_Object milliseconds) |
4588ec20 | 5952 | { |
767229f8 | 5953 | int sec, usec; |
4588ec20 | 5954 | |
767229f8 | 5955 | if (NILP (milliseconds)) |
e9c9a718 | 5956 | XSETINT (milliseconds, 0); |
767229f8 | 5957 | else |
b7826503 | 5958 | CHECK_NUMBER (milliseconds); |
b07646f5 JB |
5959 | usec = XINT (milliseconds) * 1000; |
5960 | ||
b07646f5 JB |
5961 | { |
5962 | double duration = extract_float (seconds); | |
5963 | sec = (int) duration; | |
5964 | usec += (duration - sec) * 1000000; | |
5965 | } | |
4588ec20 | 5966 | |
a41f8bed | 5967 | #ifndef EMACS_HAS_USECS |
767229f8 | 5968 | if (sec == 0 && usec != 0) |
861e19b9 | 5969 | error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); |
4588ec20 | 5970 | #endif |
767229f8 JB |
5971 | |
5972 | /* Assure that 0 <= usec < 1000000. */ | |
5973 | if (usec < 0) | |
5974 | { | |
153a073c | 5975 | /* We can't rely on the rounding being correct if usec is negative. */ |
767229f8 JB |
5976 | if (-1000000 < usec) |
5977 | sec--, usec += 1000000; | |
5978 | else | |
5979 | sec -= -usec / 1000000, usec = 1000000 - (-usec % 1000000); | |
4588ec20 | 5980 | } |
767229f8 JB |
5981 | else |
5982 | sec += usec / 1000000, usec %= 1000000; | |
5983 | ||
6b5153b1 | 5984 | if (sec < 0 || (sec == 0 && usec == 0)) |
767229f8 | 5985 | return Qnil; |
4588ec20 | 5986 | |
dcd1ca45 | 5987 | wait_reading_process_output (sec, usec, 0, 0, Qnil, NULL, 0); |
4588ec20 JB |
5988 | |
5989 | return Qnil; | |
5990 | } | |
5991 | ||
5f5c8ee5 | 5992 | |
dcd1ca45 | 5993 | /* This is just like wait_reading_process_output, except that |
902b9b6d | 5994 | it does redisplay. |
f76475ad | 5995 | |
2bcac766 CY |
5996 | TIMEOUT is number of seconds to wait (float or integer), |
5997 | or t to wait forever. | |
902b9b6d KS |
5998 | READING is 1 if reading input. |
5999 | If DO_DISPLAY is >0 display process output while waiting. | |
6000 | If DO_DISPLAY is >1 perform an initial redisplay before waiting. | |
6001 | */ | |
4588ec20 | 6002 | |
f76475ad | 6003 | Lisp_Object |
971de7fb | 6004 | sit_for (Lisp_Object timeout, int reading, int do_display) |
f76475ad | 6005 | { |
902b9b6d | 6006 | int sec, usec; |
f222369e | 6007 | |
902b9b6d | 6008 | swallow_events (do_display); |
ccddf474 | 6009 | |
902b9b6d | 6010 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 6011 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 6012 | return Qnil; |
4588ec20 | 6013 | |
902b9b6d KS |
6014 | if (do_display >= 2) |
6015 | redisplay_preserve_echo_area (2); | |
6016 | ||
8e09f23f | 6017 | if (INTEGERP (timeout)) |
f222369e | 6018 | { |
7ff14773 | 6019 | sec = XINT (timeout); |
8e09f23f | 6020 | usec = 0; |
f222369e | 6021 | } |
8e09f23f KS |
6022 | else if (FLOATP (timeout)) |
6023 | { | |
99a20368 | 6024 | double seconds = XFLOAT_DATA (timeout); |
902b9b6d KS |
6025 | sec = (int) seconds; |
6026 | usec = (int) ((seconds - sec) * 1000000); | |
6027 | } | |
2bcac766 CY |
6028 | else if (EQ (timeout, Qt)) |
6029 | { | |
6030 | sec = 0; | |
6031 | usec = 0; | |
6032 | } | |
902b9b6d | 6033 | else |
8e09f23f | 6034 | wrong_type_argument (Qnumberp, timeout); |
4588ec20 | 6035 | |
2bcac766 | 6036 | if (sec == 0 && usec == 0 && !EQ (timeout, Qt)) |
dfdb645c JB |
6037 | return Qt; |
6038 | ||
4588ec20 | 6039 | #ifdef SIGIO |
8fc798e9 | 6040 | gobble_input (0); |
f76475ad JB |
6041 | #endif |
6042 | ||
902b9b6d | 6043 | wait_reading_process_output (sec, usec, reading ? -1 : 1, do_display, |
dcd1ca45 | 6044 | Qnil, NULL, 0); |
f76475ad | 6045 | |
4588ec20 JB |
6046 | return detect_input_pending () ? Qnil : Qt; |
6047 | } | |
6048 | ||
5f5c8ee5 | 6049 | |
01327edf KS |
6050 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
6051 | doc: /* Perform redisplay if no input is available. | |
a5c2c707 | 6052 | If optional arg FORCE is non-nil or `redisplay-dont-pause' is non-nil, |
03240971 KS |
6053 | perform a full redisplay even if input is available. |
6054 | Return t if redisplay was performed, nil otherwise. */) | |
5842a27b | 6055 | (Lisp_Object force) |
f76475ad | 6056 | { |
01327edf | 6057 | int count; |
659d9874 | 6058 | |
902b9b6d KS |
6059 | swallow_events (1); |
6060 | if ((detect_input_pending_run_timers (1) | |
01327edf | 6061 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
6062 | || !NILP (Vexecuting_kbd_macro)) |
6063 | return Qnil; | |
f76475ad | 6064 | |
01327edf KS |
6065 | count = SPECPDL_INDEX (); |
6066 | if (!NILP (force) && !redisplay_dont_pause) | |
6067 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 6068 | redisplay_preserve_echo_area (2); |
01327edf | 6069 | unbind_to (count, Qnil); |
7ba07a1a | 6070 | return Qt; |
f76475ad | 6071 | } |
5f5c8ee5 GM |
6072 | |
6073 | ||
6074 | \f | |
6075 | /*********************************************************************** | |
6076 | Other Lisp Functions | |
6077 | ***********************************************************************/ | |
6078 | ||
6079 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
6080 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 6081 | buffer-modified-flags. */ |
5f5c8ee5 GM |
6082 | |
6083 | static Lisp_Object frame_and_buffer_state; | |
6084 | ||
6085 | ||
6086 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 6087 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 6088 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
6089 | VARIABLE is a variable name whose value is either nil or a state vector |
6090 | that will be updated to contain all frames and buffers, | |
228299fa | 6091 | aside from buffers whose names start with space, |
44edd521 RS |
6092 | along with the buffers' read-only and modified flags. This allows a fast |
6093 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 6094 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
6095 | the current state. |
6096 | ||
6097 | If VARIABLE is nil, an internal variable is used. Users should not | |
6098 | pass nil for VARIABLE. */) | |
5842a27b | 6099 | (Lisp_Object variable) |
5f5c8ee5 | 6100 | { |
44edd521 RS |
6101 | Lisp_Object state, tail, frame, buf; |
6102 | Lisp_Object *vecp, *end; | |
5f5c8ee5 GM |
6103 | int n; |
6104 | ||
44edd521 RS |
6105 | if (! NILP (variable)) |
6106 | { | |
6107 | CHECK_SYMBOL (variable); | |
6108 | state = Fsymbol_value (variable); | |
6109 | if (! VECTORP (state)) | |
6110 | goto changed; | |
6111 | } | |
6112 | else | |
6113 | state = frame_and_buffer_state; | |
6114 | ||
6115 | vecp = XVECTOR (state)->contents; | |
6116 | end = vecp + XVECTOR (state)->size; | |
6117 | ||
5f5c8ee5 GM |
6118 | FOR_EACH_FRAME (tail, frame) |
6119 | { | |
44edd521 RS |
6120 | if (vecp == end) |
6121 | goto changed; | |
5f5c8ee5 GM |
6122 | if (!EQ (*vecp++, frame)) |
6123 | goto changed; | |
44edd521 RS |
6124 | if (vecp == end) |
6125 | goto changed; | |
5f5c8ee5 GM |
6126 | if (!EQ (*vecp++, XFRAME (frame)->name)) |
6127 | goto changed; | |
6128 | } | |
44edd521 | 6129 | /* Check that the buffer info matches. */ |
7539e11f | 6130 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6131 | { |
7539e11f | 6132 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6133 | /* Ignore buffers that aren't included in buffer lists. */ |
d5db4077 | 6134 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
5f5c8ee5 | 6135 | continue; |
44edd521 RS |
6136 | if (vecp == end) |
6137 | goto changed; | |
5f5c8ee5 GM |
6138 | if (!EQ (*vecp++, buf)) |
6139 | goto changed; | |
44edd521 RS |
6140 | if (vecp == end) |
6141 | goto changed; | |
5f5c8ee5 GM |
6142 | if (!EQ (*vecp++, XBUFFER (buf)->read_only)) |
6143 | goto changed; | |
44edd521 RS |
6144 | if (vecp == end) |
6145 | goto changed; | |
5f5c8ee5 GM |
6146 | if (!EQ (*vecp++, Fbuffer_modified_p (buf))) |
6147 | goto changed; | |
6148 | } | |
44edd521 RS |
6149 | if (vecp == end) |
6150 | goto changed; | |
5f5c8ee5 GM |
6151 | /* Detect deletion of a buffer at the end of the list. */ |
6152 | if (EQ (*vecp, Qlambda)) | |
6153 | return Qnil; | |
44edd521 RS |
6154 | |
6155 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 6156 | changed: |
44edd521 RS |
6157 | /* Count the size we will need. |
6158 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
6159 | n = 1; |
6160 | FOR_EACH_FRAME (tail, frame) | |
6161 | n += 2; | |
7539e11f | 6162 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6163 | n += 3; |
44edd521 RS |
6164 | /* Reallocate the vector if data has grown to need it, |
6165 | or if it has shrunk a lot. */ | |
6166 | if (! VECTORP (state) | |
6167 | || n > XVECTOR (state)->size | |
6168 | || n + 20 < XVECTOR (state)->size / 2) | |
5f5c8ee5 | 6169 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
6170 | { |
6171 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
6172 | if (! NILP (variable)) | |
6173 | Fset (variable, state); | |
6174 | else | |
6175 | frame_and_buffer_state = state; | |
6176 | } | |
6177 | ||
6178 | /* Record the new data in the (possibly reallocated) vector. */ | |
6179 | vecp = XVECTOR (state)->contents; | |
5f5c8ee5 GM |
6180 | FOR_EACH_FRAME (tail, frame) |
6181 | { | |
6182 | *vecp++ = frame; | |
6183 | *vecp++ = XFRAME (frame)->name; | |
6184 | } | |
7539e11f | 6185 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6186 | { |
7539e11f | 6187 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6188 | /* Ignore buffers that aren't included in buffer lists. */ |
d5db4077 | 6189 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
5f5c8ee5 GM |
6190 | continue; |
6191 | *vecp++ = buf; | |
6192 | *vecp++ = XBUFFER (buf)->read_only; | |
6193 | *vecp++ = Fbuffer_modified_p (buf); | |
6194 | } | |
6195 | /* Fill up the vector with lambdas (always at least one). */ | |
6196 | *vecp++ = Qlambda; | |
44edd521 RS |
6197 | while (vecp - XVECTOR (state)->contents |
6198 | < XVECTOR (state)->size) | |
5f5c8ee5 GM |
6199 | *vecp++ = Qlambda; |
6200 | /* Make sure we didn't overflow the vector. */ | |
44edd521 RS |
6201 | if (vecp - XVECTOR (state)->contents |
6202 | > XVECTOR (state)->size) | |
5f5c8ee5 GM |
6203 | abort (); |
6204 | return Qt; | |
6205 | } | |
6206 | ||
6207 | ||
4588ec20 | 6208 | \f |
5f5c8ee5 GM |
6209 | /*********************************************************************** |
6210 | Initialization | |
6211 | ***********************************************************************/ | |
6212 | ||
5f5c8ee5 GM |
6213 | /* Initialization done when Emacs fork is started, before doing stty. |
6214 | Determine terminal type and set terminal_driver. Then invoke its | |
6215 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 6216 | |
dfcf069d | 6217 | void |
971de7fb | 6218 | init_display (void) |
4588ec20 | 6219 | { |
28d440ab KL |
6220 | char *terminal_type; |
6221 | ||
5f5c8ee5 GM |
6222 | /* Construct the space glyph. */ |
6223 | space_glyph.type = CHAR_GLYPH; | |
3fc809e2 | 6224 | SET_CHAR_GLYPH (space_glyph, ' ', DEFAULT_FACE_ID, 0); |
5f5c8ee5 GM |
6225 | space_glyph.charpos = -1; |
6226 | ||
4588ec20 JB |
6227 | inverse_video = 0; |
6228 | cursor_in_echo_area = 0; | |
6229 | terminal_type = (char *) 0; | |
6230 | ||
1315c181 JB |
6231 | /* Now is the time to initialize this; it's used by init_sys_modes |
6232 | during startup. */ | |
2246281f | 6233 | Vinitial_window_system = Qnil; |
4588ec20 | 6234 | |
4181ad9c KL |
6235 | /* SIGWINCH needs to be handled no matter what display we start |
6236 | with. Otherwise newly opened tty frames will not resize | |
6237 | automatically. */ | |
6238 | #ifdef SIGWINCH | |
6239 | #ifndef CANNOT_DUMP | |
6240 | if (initialized) | |
6241 | #endif /* CANNOT_DUMP */ | |
6242 | signal (SIGWINCH, window_change_signal); | |
6243 | #endif /* SIGWINCH */ | |
4588ec20 | 6244 | |
d6ef42b9 | 6245 | /* If running as a daemon, no need to initialize any frames/terminal. */ |
ff808935 DN |
6246 | if (IS_DAEMON) |
6247 | return; | |
d6ef42b9 | 6248 | |
1315c181 JB |
6249 | /* If the user wants to use a window system, we shouldn't bother |
6250 | initializing the terminal. This is especially important when the | |
6251 | terminal is so dumb that emacs gives up before and doesn't bother | |
6252 | using the window system. | |
4588ec20 | 6253 | |
36bbad1d KH |
6254 | If the DISPLAY environment variable is set and nonempty, |
6255 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6256 | |
6257 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 6258 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 6259 | { |
36bbad1d | 6260 | char *display; |
36bbad1d | 6261 | display = getenv ("DISPLAY"); |
36bbad1d | 6262 | display_arg = (display != 0 && *display != 0); |
c1fc674b AS |
6263 | |
6264 | if (display_arg && !x_display_ok (display)) | |
6265 | { | |
6266 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
6267 | display); | |
6268 | inhibit_window_system = 1; | |
6269 | } | |
f040093a | 6270 | } |
d460af17 | 6271 | |
177c0ea7 | 6272 | if (!inhibit_window_system && display_arg |
9e4555e8 RS |
6273 | #ifndef CANNOT_DUMP |
6274 | && initialized | |
6275 | #endif | |
6276 | ) | |
4588ec20 | 6277 | { |
111d9af3 | 6278 | Vinitial_window_system = Qx; |
4588ec20 JB |
6279 | #ifdef HAVE_X11 |
6280 | Vwindow_system_version = make_number (11); | |
039e5d71 | 6281 | #endif |
8a2a6032 | 6282 | #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES) |
039e5d71 | 6283 | /* In some versions of ncurses, |
6a428f77 | 6284 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6285 | So call tgetent. */ |
6286 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 | 6287 | #endif |
5f5c8ee5 | 6288 | adjust_frame_glyphs_initially (); |
4588ec20 JB |
6289 | return; |
6290 | } | |
6291 | #endif /* HAVE_X_WINDOWS */ | |
6292 | ||
fd2e066a | 6293 | #ifdef HAVE_NTGUI |
177c0ea7 | 6294 | if (!inhibit_window_system) |
fd2e066a | 6295 | { |
111d9af3 | 6296 | Vinitial_window_system = Qw32; |
fd2e066a | 6297 | Vwindow_system_version = make_number (1); |
5f5c8ee5 | 6298 | adjust_frame_glyphs_initially (); |
fd2e066a GV |
6299 | return; |
6300 | } | |
6301 | #endif /* HAVE_NTGUI */ | |
6302 | ||
edfda783 AR |
6303 | #ifdef HAVE_NS |
6304 | if (!inhibit_window_system | |
6305 | #ifndef CANNOT_DUMP | |
6306 | && initialized | |
6307 | #endif | |
6308 | ) | |
6309 | { | |
111d9af3 | 6310 | Vinitial_window_system = Qns; |
edfda783 AR |
6311 | Vwindow_system_version = make_number(10); |
6312 | adjust_frame_glyphs_initially (); | |
6313 | return; | |
6314 | } | |
6315 | #endif | |
6316 | ||
4588ec20 JB |
6317 | /* If no window system has been specified, try to use the terminal. */ |
6318 | if (! isatty (0)) | |
6319 | { | |
1559a86d | 6320 | fatal ("standard input is not a tty"); |
4588ec20 JB |
6321 | exit (1); |
6322 | } | |
6323 | ||
6152361f JR |
6324 | #ifdef WINDOWSNT |
6325 | terminal_type = "w32console"; | |
6326 | #else | |
153a073c | 6327 | /* Look at the TERM variable. */ |
4588ec20 | 6328 | terminal_type = (char *) getenv ("TERM"); |
6152361f | 6329 | #endif |
4588ec20 JB |
6330 | if (!terminal_type) |
6331 | { | |
5d12ff0b | 6332 | #ifdef HAVE_WINDOW_SYSTEM |
b9e590fc RS |
6333 | if (! inhibit_window_system) |
6334 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6335 | else |
6336 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6337 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
4588ec20 JB |
6338 | exit (1); |
6339 | } | |
6340 | ||
0a125897 | 6341 | { |
6ed8eeff | 6342 | struct terminal *t; |
3224dac1 KL |
6343 | struct frame *f = XFRAME (selected_frame); |
6344 | ||
6345 | /* Open a display on the controlling tty. */ | |
6ed8eeff | 6346 | t = init_tty (0, terminal_type, 1); /* Errors are fatal. */ |
3224dac1 KL |
6347 | |
6348 | /* Convert the initial frame to use the new display. */ | |
b04f5ad2 | 6349 | if (f->output_method != output_initial) |
3224dac1 | 6350 | abort (); |
6ed8eeff KL |
6351 | f->output_method = t->type; |
6352 | f->terminal = t; | |
3224dac1 | 6353 | |
6ed8eeff | 6354 | t->reference_count++; |
7ac5dac9 EZ |
6355 | #ifdef MSDOS |
6356 | f->output_data.tty->display_info = &the_only_display_info; | |
6357 | #else | |
6358 | if (f->output_method == output_termcap) | |
6359 | create_tty_output (f); | |
6360 | #endif | |
6ed8eeff | 6361 | t->display_info.tty->top_frame = selected_frame; |
5b65d888 | 6362 | change_frame_size (XFRAME (selected_frame), |
6ed8eeff KL |
6363 | FrameRows (t->display_info.tty), |
6364 | FrameCols (t->display_info.tty), 0, 0, 1); | |
3224dac1 | 6365 | |
6ed8eeff KL |
6366 | /* Delete the initial terminal. */ |
6367 | if (--initial_terminal->reference_count == 0 | |
6368 | && initial_terminal->delete_terminal_hook) | |
6369 | (*initial_terminal->delete_terminal_hook) (initial_terminal); | |
2666355c KL |
6370 | |
6371 | /* Update frame parameters to reflect the new type. */ | |
6372 | Fmodify_frame_parameters | |
6373 | (selected_frame, Fcons (Fcons (Qtty_type, | |
6ed8eeff | 6374 | Ftty_type (selected_frame)), Qnil)); |
657ceaa0 EZ |
6375 | if (t->display_info.tty->name) |
6376 | Fmodify_frame_parameters (selected_frame, | |
6377 | Fcons (Fcons (Qtty, build_string (t->display_info.tty->name)), | |
6378 | Qnil)); | |
6379 | else | |
6380 | Fmodify_frame_parameters (selected_frame, Fcons (Fcons (Qtty, Qnil), | |
6381 | Qnil)); | |
0a125897 | 6382 | } |
3fc809e2 | 6383 | |
d86c299a | 6384 | { |
91fb7e1b | 6385 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6386 | int width = FRAME_TOTAL_COLS (sf); |
6387 | int height = FRAME_LINES (sf); | |
d86c299a | 6388 | |
5f5c8ee5 | 6389 | unsigned int total_glyphs = height * (width + 2) * sizeof (struct glyph); |
d86c299a | 6390 | |
5f5c8ee5 GM |
6391 | /* If these sizes are so big they cause overflow, just ignore the |
6392 | change. It's not clear what better we could do. */ | |
6393 | if (total_glyphs / sizeof (struct glyph) / height != width + 2) | |
1559a86d | 6394 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6395 | } |
6396 | ||
5f5c8ee5 | 6397 | adjust_frame_glyphs_initially (); |
91fb7e1b | 6398 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6399 | |
5f5c8ee5 GM |
6400 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ |
6401 | if (initialized | |
6402 | && !noninteractive | |
2246281f | 6403 | && NILP (Vinitial_window_system)) |
2d764c78 EZ |
6404 | { |
6405 | /* For the initial frame, we don't have any way of knowing what | |
6406 | are the foreground and background colors of the terminal. */ | |
6407 | struct frame *sf = SELECTED_FRAME(); | |
6408 | ||
f9d2fdc4 EZ |
6409 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
6410 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
6411 | call0 (intern ("tty-set-up-initial-frame-faces")); |
6412 | } | |
5f5c8ee5 GM |
6413 | } |
6414 | ||
6415 | ||
6416 | \f | |
6417 | /*********************************************************************** | |
6418 | Blinking cursor | |
6419 | ***********************************************************************/ | |
6420 | ||
c3f13540 | 6421 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 6422 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 6423 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
6424 | WINDOW nil means use the selected window. SHOW non-nil means |
6425 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 | 6426 | don't show a cursor. */) |
5842a27b | 6427 | (Lisp_Object window, Lisp_Object show) |
5f5c8ee5 | 6428 | { |
5f5c8ee5 GM |
6429 | /* Don't change cursor state while redisplaying. This could confuse |
6430 | output routines. */ | |
6431 | if (!redisplaying_p) | |
6432 | { | |
6433 | if (NILP (window)) | |
6434 | window = selected_window; | |
6435 | else | |
b7826503 | 6436 | CHECK_WINDOW (window); |
177c0ea7 | 6437 | |
5d7791b3 | 6438 | XWINDOW (window)->cursor_off_p = NILP (show); |
5f5c8ee5 GM |
6439 | } |
6440 | ||
6441 | return Qnil; | |
4588ec20 | 6442 | } |
5f5c8ee5 GM |
6443 | |
6444 | ||
5d7791b3 GM |
6445 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
6446 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 6447 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 | 6448 | WINDOW nil or omitted means report on the selected window. */) |
5842a27b | 6449 | (Lisp_Object window) |
5d7791b3 GM |
6450 | { |
6451 | struct window *w; | |
177c0ea7 | 6452 | |
5d7791b3 GM |
6453 | if (NILP (window)) |
6454 | window = selected_window; | |
6455 | else | |
b7826503 | 6456 | CHECK_WINDOW (window); |
177c0ea7 | 6457 | |
5d7791b3 | 6458 | w = XWINDOW (window); |
177c0ea7 | 6459 | return w->cursor_off_p ? Qnil : Qt; |
5d7791b3 GM |
6460 | } |
6461 | ||
87478b52 SM |
6462 | DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame, |
6463 | Slast_nonminibuf_frame, 0, 0, 0, | |
6464 | doc: /* Value is last nonminibuffer frame. */) | |
5842a27b | 6465 | (void) |
87478b52 | 6466 | { |
4958ed94 | 6467 | Lisp_Object frame = Qnil; |
87478b52 | 6468 | |
4958ed94 SM |
6469 | if (last_nonminibuf_frame) |
6470 | XSETFRAME (frame, last_nonminibuf_frame); | |
87478b52 SM |
6471 | |
6472 | return frame; | |
6473 | } | |
4588ec20 | 6474 | \f |
5f5c8ee5 GM |
6475 | /*********************************************************************** |
6476 | Initialization | |
6477 | ***********************************************************************/ | |
6478 | ||
dfcf069d | 6479 | void |
971de7fb | 6480 | syms_of_display (void) |
4588ec20 | 6481 | { |
502b9b64 | 6482 | defsubr (&Sredraw_frame); |
4588ec20 | 6483 | defsubr (&Sredraw_display); |
078b3696 | 6484 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
6485 | defsubr (&Sopen_termscript); |
6486 | defsubr (&Sding); | |
7ba07a1a | 6487 | defsubr (&Sredisplay); |
4588ec20 JB |
6488 | defsubr (&Ssleep_for); |
6489 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 6490 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 6491 | defsubr (&Sinternal_show_cursor_p); |
87478b52 | 6492 | defsubr (&Slast_nonminibuf_frame); |
4588ec20 | 6493 | |
2d5912c1 | 6494 | #if GLYPH_DEBUG |
9b0e97aa GM |
6495 | defsubr (&Sdump_redisplay_history); |
6496 | #endif | |
6497 | ||
d1dad759 | 6498 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
6499 | staticpro (&frame_and_buffer_state); |
6500 | ||
d67b4f80 | 6501 | Qdisplay_table = intern_c_string ("display-table"); |
9cda4f7c | 6502 | staticpro (&Qdisplay_table); |
d67b4f80 | 6503 | Qredisplay_dont_pause = intern_c_string ("redisplay-dont-pause"); |
e7067d00 | 6504 | staticpro (&Qredisplay_dont_pause); |
9cda4f7c | 6505 | |
29208e82 | 6506 | DEFVAR_INT ("baud-rate", baud_rate, |
bacf09b4 | 6507 | doc: /* *The output baud rate of the terminal. |
228299fa GM |
6508 | On most systems, changing this value will affect the amount of padding |
6509 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 6510 | |
29208e82 | 6511 | DEFVAR_BOOL ("inverse-video", inverse_video, |
bacf09b4 | 6512 | doc: /* *Non-nil means invert the entire frame display. |
228299fa | 6513 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 6514 | |
29208e82 | 6515 | DEFVAR_BOOL ("visible-bell", visible_bell, |
bacf09b4 | 6516 | doc: /* *Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
6517 | |
6518 | See also `ring-bell-function'. */); | |
177c0ea7 | 6519 | |
29208e82 | 6520 | DEFVAR_BOOL ("no-redraw-on-reenter", no_redraw_on_reenter, |
bacf09b4 | 6521 | doc: /* *Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
6522 | A non-nil value is useful if the terminal can automatically preserve |
6523 | Emacs's frame display when you reenter Emacs. | |
6524 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 6525 | |
29208e82 | 6526 | DEFVAR_LISP ("initial-window-system", Vinitial_window_system, |
2246281f | 6527 | doc: /* Name of the window system that Emacs uses for the first frame. |
89baa1df EZ |
6528 | The value is a symbol: |
6529 | nil for a termcap frame (a character-only terminal), | |
6530 | 'x' for an Emacs frame that is really an X window, | |
6531 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6532 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6533 | 'pc' for a direct-write MS-DOS frame. | |
6534 | ||
6535 | Use of this variable as a boolean is deprecated. Instead, | |
6536 | use `display-graphic-p' or any of the other `display-*-p' | |
6537 | predicates which report frame's specific UI-related capabilities. */); | |
177c0ea7 | 6538 | |
70b8d0a4 SM |
6539 | DEFVAR_KBOARD ("window-system", Vwindow_system, |
6540 | doc: /* Name of window system through which the selected frame is displayed. | |
89baa1df EZ |
6541 | The value is a symbol: |
6542 | nil for a termcap frame (a character-only terminal), | |
6543 | 'x' for an Emacs frame that is really an X window, | |
6544 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6545 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6546 | 'pc' for a direct-write MS-DOS frame. | |
6547 | ||
6548 | Use of this variable as a boolean is deprecated. Instead, | |
6549 | use `display-graphic-p' or any of the other `display-*-p' | |
6550 | predicates which report frame's specific UI-related capabilities. */); | |
70b8d0a4 | 6551 | |
29208e82 | 6552 | DEFVAR_LISP ("window-system-version", Vwindow_system_version, |
bacf09b4 | 6553 | doc: /* The version number of the window system in use. |
c22140f6 | 6554 | For X windows, this is 11. */); |
177c0ea7 | 6555 | |
29208e82 | 6556 | DEFVAR_BOOL ("cursor-in-echo-area", cursor_in_echo_area, |
bacf09b4 | 6557 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 6558 | |
29208e82 | 6559 | DEFVAR_LISP ("glyph-table", Vglyph_table, |
bacf09b4 | 6560 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
6561 | If not nil, this is a vector indexed by glyph code to define the glyph. |
6562 | Each element can be: | |
6563 | integer: a glyph code which this glyph is an alias for. | |
6564 | string: output this glyph using that string (not impl. in X windows). | |
6565 | nil: this glyph mod 524288 is the code of a character to output, | |
6566 | and this glyph / 524288 is the face number (see `face-id') to use | |
6567 | while outputting it. */); | |
4588ec20 JB |
6568 | Vglyph_table = Qnil; |
6569 | ||
29208e82 | 6570 | DEFVAR_LISP ("standard-display-table", Vstandard_display_table, |
bacf09b4 | 6571 | doc: /* Display table to use for buffers that specify none. |
228299fa | 6572 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
6573 | Vstandard_display_table = Qnil; |
6574 | ||
29208e82 | 6575 | DEFVAR_BOOL ("redisplay-dont-pause", redisplay_dont_pause, |
bacf09b4 | 6576 | doc: /* *Non-nil means update isn't paused when input is detected. */); |
5f5c8ee5 GM |
6577 | redisplay_dont_pause = 0; |
6578 | ||
d012c62b | 6579 | #if PERIODIC_PREEMPTION_CHECKING |
29208e82 | 6580 | DEFVAR_LISP ("redisplay-preemption-period", Vredisplay_preemption_period, |
d012c62b KS |
6581 | doc: /* *The period in seconds between checking for input during redisplay. |
6582 | If input is detected, redisplay is pre-empted, and the input is processed. | |
6583 | If nil, never pre-empt redisplay. */); | |
6584 | Vredisplay_preemption_period = make_float (0.10); | |
6585 | #endif | |
6586 | ||
4588ec20 JB |
6587 | #ifdef CANNOT_DUMP |
6588 | if (noninteractive) | |
6589 | #endif | |
6590 | { | |
2246281f | 6591 | Vinitial_window_system = Qnil; |
4588ec20 JB |
6592 | Vwindow_system_version = Qnil; |
6593 | } | |
6594 | } |