Commit | Line | Data |
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4588ec20 | 1 | /* Updating of data structures for redisplay. |
73b0cd50 | 2 | Copyright (C) 1985-1988, 1993-1995, 1997-2011 Free Software Foundation, Inc. |
4588ec20 JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
9ec0b715 | 6 | GNU Emacs is free software: you can redistribute it and/or modify |
4588ec20 | 7 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
8 | the Free Software Foundation, either version 3 of the License, or |
9 | (at your option) any later version. | |
4588ec20 JB |
10 | |
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 17 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
4588ec20 | 18 | |
18160b98 | 19 | #include <config.h> |
68c45bf0 | 20 | #include <signal.h> |
565620a5 | 21 | #include <stdio.h> |
4588ec20 | 22 | #include <ctype.h> |
d7306fe6 | 23 | #include <setjmp.h> |
dfcf069d | 24 | #include <unistd.h> |
dfcf069d | 25 | |
47099d6f | 26 | #include "lisp.h" |
4588ec20 JB |
27 | #include "termchar.h" |
28 | #include "termopts.h" | |
a0879520 | 29 | /* cm.h must come after dispextern.h on Windows. */ |
fd2e066a GV |
30 | #include "dispextern.h" |
31 | #include "cm.h" | |
4588ec20 | 32 | #include "buffer.h" |
83be827a | 33 | #include "character.h" |
d43721a2 | 34 | #include "keyboard.h" |
502b9b64 | 35 | #include "frame.h" |
428a555e | 36 | #include "termhooks.h" |
4588ec20 JB |
37 | #include "window.h" |
38 | #include "commands.h" | |
39 | #include "disptab.h" | |
40 | #include "indent.h" | |
d169fe39 | 41 | #include "intervals.h" |
97cf50e7 | 42 | #include "blockinput.h" |
dfcf069d | 43 | #include "process.h" |
4588ec20 | 44 | |
58b2bb63 | 45 | #include "syssignal.h" |
a41f8bed | 46 | |
4588ec20 JB |
47 | #ifdef HAVE_X_WINDOWS |
48 | #include "xterm.h" | |
5f5c8ee5 | 49 | #endif /* HAVE_X_WINDOWS */ |
4588ec20 | 50 | |
fd2e066a GV |
51 | #ifdef HAVE_NTGUI |
52 | #include "w32term.h" | |
53 | #endif /* HAVE_NTGUI */ | |
54 | ||
edfda783 AR |
55 | #ifdef HAVE_NS |
56 | #include "nsterm.h" | |
57 | #endif | |
58 | ||
5f5c8ee5 | 59 | /* Include systime.h after xterm.h to avoid double inclusion of time.h. */ |
6cbd1643 | 60 | |
5f5c8ee5 | 61 | #include "systime.h" |
3883a901 RS |
62 | #include <errno.h> |
63 | ||
4588ec20 | 64 | /* Get number of chars of output now in the buffer of a stdio stream. |
5f5c8ee5 GM |
65 | This ought to be built in in stdio, but it isn't. Some s- files |
66 | override this because their stdio internals differ. */ | |
67 | ||
e3271ae5 | 68 | #ifdef __GNU_LIBRARY__ |
5f5c8ee5 GM |
69 | |
70 | /* The s- file might have overridden the definition with one that | |
71 | works for the system's C library. But we are using the GNU C | |
72 | library, so this is the right definition for every system. */ | |
73 | ||
3883a901 RS |
74 | #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT |
75 | #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT | |
76 | #else | |
cb5558ff | 77 | #undef PENDING_OUTPUT_COUNT |
e3271ae5 | 78 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer) |
3883a901 RS |
79 | #endif |
80 | #else /* not __GNU_LIBRARY__ */ | |
68c45bf0 PE |
81 | #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING |
82 | #include <stdio_ext.h> | |
83 | #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE) | |
84 | #endif | |
cb5558ff | 85 | #ifndef PENDING_OUTPUT_COUNT |
4588ec20 JB |
86 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) |
87 | #endif | |
5f5c8ee5 GM |
88 | #endif /* not __GNU_LIBRARY__ */ |
89 | ||
8a2a6032 | 90 | #if defined(HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES) |
fa0ec9f4 DL |
91 | #include <term.h> /* for tgetent */ |
92 | #endif | |
5f5c8ee5 GM |
93 | \f |
94 | /* Structure to pass dimensions around. Used for character bounding | |
95 | boxes, glyph matrix dimensions and alike. */ | |
96 | ||
97 | struct dim | |
98 | { | |
99 | int width; | |
100 | int height; | |
101 | }; | |
102 | ||
103 | \f | |
104 | /* Function prototypes. */ | |
105 | ||
f57e2426 J |
106 | static struct glyph_matrix *save_current_matrix (struct frame *); |
107 | static void restore_current_matrix (struct frame *, struct glyph_matrix *); | |
108 | static int showing_window_margins_p (struct window *); | |
109 | static void fake_current_matrices (Lisp_Object); | |
110 | static void redraw_overlapping_rows (struct window *, int); | |
111 | static void redraw_overlapped_rows (struct window *, int); | |
112 | static int count_blanks (struct glyph *, int); | |
113 | static int count_match (struct glyph *, struct glyph *, | |
114 | struct glyph *, struct glyph *); | |
115 | static unsigned line_draw_cost (struct glyph_matrix *, int); | |
116 | static void update_frame_line (struct frame *, int); | |
5f5c8ee5 | 117 | static struct dim allocate_matrices_for_frame_redisplay |
f57e2426 | 118 | (Lisp_Object, int, int, int, int *); |
2f7c71a1 AS |
119 | static int required_matrix_height (struct window *); |
120 | static int required_matrix_width (struct window *); | |
f57e2426 J |
121 | static void allocate_matrices_for_window_redisplay (struct window *); |
122 | static int realloc_glyph_pool (struct glyph_pool *, struct dim); | |
123 | static void adjust_frame_glyphs (struct frame *); | |
124 | struct glyph_matrix *new_glyph_matrix (struct glyph_pool *); | |
125 | static void free_glyph_matrix (struct glyph_matrix *); | |
126 | static void adjust_glyph_matrix (struct window *, struct glyph_matrix *, | |
127 | int, int, struct dim); | |
128 | static void change_frame_size_1 (struct frame *, int, int, int, int, int); | |
129 | static void swap_glyph_pointers (struct glyph_row *, struct glyph_row *); | |
f1d2ce7f | 130 | #if GLYPH_DEBUG |
f57e2426 | 131 | static int glyph_row_slice_p (struct glyph_row *, struct glyph_row *); |
9339e87f | 132 | #endif |
f57e2426 J |
133 | static void fill_up_frame_row_with_spaces (struct glyph_row *, int); |
134 | static void build_frame_matrix_from_window_tree (struct glyph_matrix *, | |
135 | struct window *); | |
136 | static void build_frame_matrix_from_leaf_window (struct glyph_matrix *, | |
137 | struct window *); | |
138 | static struct glyph_pool *new_glyph_pool (void); | |
139 | static void free_glyph_pool (struct glyph_pool *); | |
140 | static void adjust_frame_glyphs_initially (void); | |
141 | static void adjust_frame_message_buffer (struct frame *); | |
142 | static void adjust_decode_mode_spec_buffer (struct frame *); | |
143 | static void fill_up_glyph_row_with_spaces (struct glyph_row *); | |
144 | static void build_frame_matrix (struct frame *); | |
145 | void clear_current_matrices (struct frame *); | |
146 | void scroll_glyph_matrix_range (struct glyph_matrix *, int, int, | |
147 | int, int); | |
148 | static void clear_window_matrices (struct window *, int); | |
149 | static void fill_up_glyph_row_area_with_spaces (struct glyph_row *, int); | |
150 | static int scrolling_window (struct window *, int); | |
151 | static int update_window_line (struct window *, int, int *); | |
152 | static void update_marginal_area (struct window *, int, int); | |
153 | static int update_text_area (struct window *, int); | |
154 | static void make_current (struct glyph_matrix *, struct glyph_matrix *, | |
155 | int); | |
156 | static void mirror_make_current (struct window *, int); | |
157 | void check_window_matrix_pointers (struct window *); | |
b96fd3e8 | 158 | #if GLYPH_DEBUG |
f57e2426 J |
159 | static void check_matrix_pointers (struct glyph_matrix *, |
160 | struct glyph_matrix *); | |
b96fd3e8 | 161 | #endif |
f57e2426 J |
162 | static void mirror_line_dance (struct window *, int, int, int *, char *); |
163 | static int update_window_tree (struct window *, int); | |
164 | static int update_window (struct window *, int); | |
165 | static int update_frame_1 (struct frame *, int, int); | |
166 | static void set_window_cursor_after_update (struct window *); | |
f57e2426 J |
167 | static void adjust_frame_glyphs_for_window_redisplay (struct frame *); |
168 | static void adjust_frame_glyphs_for_frame_redisplay (struct frame *); | |
5f5c8ee5 | 169 | |
5f5c8ee5 | 170 | \f |
d012c62b KS |
171 | /* Define PERIODIC_PREEMPTION_CHECKING to 1, if micro-second timers |
172 | are supported, so we can check for input during redisplay at | |
173 | regular intervals. */ | |
174 | #ifdef EMACS_HAS_USECS | |
175 | #define PERIODIC_PREEMPTION_CHECKING 1 | |
176 | #else | |
177 | #define PERIODIC_PREEMPTION_CHECKING 0 | |
178 | #endif | |
179 | ||
180 | #if PERIODIC_PREEMPTION_CHECKING | |
181 | ||
d012c62b KS |
182 | /* Redisplay preemption timers. */ |
183 | ||
184 | static EMACS_TIME preemption_period; | |
185 | static EMACS_TIME preemption_next_check; | |
186 | ||
187 | #endif | |
188 | ||
a41f8bed | 189 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 190 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 191 | |
502b9b64 | 192 | int frame_garbaged; |
4588ec20 | 193 | |
5f5c8ee5 | 194 | /* Nonzero means last display completed. Zero means it was preempted. */ |
4588ec20 JB |
195 | |
196 | int display_completed; | |
197 | ||
e7067d00 | 198 | Lisp_Object Qdisplay_table, Qredisplay_dont_pause; |
5f5c8ee5 | 199 | |
4588ec20 | 200 | \f |
5f5c8ee5 | 201 | /* The currently selected frame. In a single-frame version, this |
91fb7e1b | 202 | variable always equals the_only_frame. */ |
4588ec20 | 203 | |
91fb7e1b | 204 | Lisp_Object selected_frame; |
4588ec20 | 205 | |
5f5c8ee5 | 206 | /* A frame which is not just a mini-buffer, or 0 if there are no such |
502b9b64 | 207 | frames. This is usually the most recent such frame that was |
87485d6f MW |
208 | selected. In a single-frame version, this variable always holds |
209 | the address of the_only_frame. */ | |
4588ec20 | 210 | |
5f5c8ee5 | 211 | struct frame *last_nonminibuf_frame; |
d52bad65 | 212 | |
5f5c8ee5 | 213 | /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 214 | |
5f5c8ee5 | 215 | int delayed_size_change; |
4588ec20 | 216 | |
5f5c8ee5 | 217 | /* 1 means glyph initialization has been completed at startup. */ |
4588ec20 | 218 | |
5f5c8ee5 | 219 | static int glyphs_initialized_initially_p; |
4588ec20 | 220 | |
5f5c8ee5 | 221 | /* Updated window if != 0. Set by update_window. */ |
4588ec20 | 222 | |
5f5c8ee5 | 223 | struct window *updated_window; |
4588ec20 | 224 | |
5f5c8ee5 | 225 | /* Glyph row updated in update_window_line, and area that is updated. */ |
4588ec20 | 226 | |
5f5c8ee5 GM |
227 | struct glyph_row *updated_row; |
228 | int updated_area; | |
4588ec20 | 229 | |
5f5c8ee5 | 230 | /* A glyph for a space. */ |
4588ec20 | 231 | |
5f5c8ee5 | 232 | struct glyph space_glyph; |
4588ec20 | 233 | |
5f5c8ee5 GM |
234 | /* Counts of allocated structures. These counts serve to diagnose |
235 | memory leaks and double frees. */ | |
4588ec20 | 236 | |
5f5c8ee5 GM |
237 | int glyph_matrix_count; |
238 | int glyph_pool_count; | |
4588ec20 | 239 | |
5f5c8ee5 GM |
240 | /* If non-null, the frame whose frame matrices are manipulated. If |
241 | null, window matrices are worked on. */ | |
4588ec20 | 242 | |
5f5c8ee5 | 243 | static struct frame *frame_matrix_frame; |
4588ec20 | 244 | |
5f5c8ee5 GM |
245 | /* Non-zero means that fonts have been loaded since the last glyph |
246 | matrix adjustments. Redisplay must stop, and glyph matrices must | |
247 | be adjusted when this flag becomes non-zero during display. The | |
248 | reason fonts can be loaded so late is that fonts of fontsets are | |
3aa9f0c4 KH |
249 | loaded on demand. Another reason is that a line contains many |
250 | characters displayed by zero width or very narrow glyphs of | |
251 | variable-width fonts. */ | |
836d2cde | 252 | |
5f5c8ee5 | 253 | int fonts_changed_p; |
836d2cde | 254 | |
177c0ea7 | 255 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 256 | This may only be used for terminal frames. */ |
836d2cde | 257 | |
5f5c8ee5 | 258 | #if GLYPH_DEBUG |
4588ec20 | 259 | |
f57e2426 J |
260 | static int window_to_frame_vpos (struct window *, int); |
261 | static int window_to_frame_hpos (struct window *, int); | |
5f5c8ee5 GM |
262 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) |
263 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 264 | |
9b0e97aa GM |
265 | /* One element of the ring buffer containing redisplay history |
266 | information. */ | |
267 | ||
268 | struct redisplay_history | |
269 | { | |
270 | char trace[512 + 100]; | |
271 | }; | |
272 | ||
273 | /* The size of the history buffer. */ | |
274 | ||
275 | #define REDISPLAY_HISTORY_SIZE 30 | |
276 | ||
277 | /* The redisplay history buffer. */ | |
278 | ||
279 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
280 | ||
281 | /* Next free entry in redisplay_history. */ | |
282 | ||
283 | static int history_idx; | |
284 | ||
285 | /* A tick that's incremented each time something is added to the | |
286 | history. */ | |
287 | ||
288 | static unsigned history_tick; | |
289 | ||
f57e2426 J |
290 | static void add_frame_display_history (struct frame *, int); |
291 | static void add_window_display_history (struct window *, char *, int); | |
6a8aec41 | 292 | \f |
9b0e97aa GM |
293 | /* Add to the redisplay history how window W has been displayed. |
294 | MSG is a trace containing the information how W's glyph matrix | |
153a073c | 295 | has been constructed. PAUSED_P non-zero means that the update |
9b0e97aa GM |
296 | has been interrupted for pending input. */ |
297 | ||
298 | static void | |
59fc5cf9 | 299 | add_window_display_history (struct window *w, char *msg, int paused_p) |
9b0e97aa GM |
300 | { |
301 | char *buf; | |
177c0ea7 | 302 | |
9b0e97aa GM |
303 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
304 | history_idx = 0; | |
305 | buf = redisplay_history[history_idx].trace; | |
306 | ++history_idx; | |
177c0ea7 | 307 | |
9b0e97aa GM |
308 | sprintf (buf, "%d: window %p (`%s')%s\n", |
309 | history_tick++, | |
310 | w, | |
311 | ((BUFFERP (w->buffer) | |
312 | && STRINGP (XBUFFER (w->buffer)->name)) | |
51b59d79 | 313 | ? SSDATA (XBUFFER (w->buffer)->name) |
9b0e97aa GM |
314 | : "???"), |
315 | paused_p ? " ***paused***" : ""); | |
316 | strcat (buf, msg); | |
317 | } | |
318 | ||
319 | ||
320 | /* Add to the redisplay history that frame F has been displayed. | |
321 | PAUSED_P non-zero means that the update has been interrupted for | |
322 | pending input. */ | |
323 | ||
324 | static void | |
59fc5cf9 | 325 | add_frame_display_history (struct frame *f, int paused_p) |
9b0e97aa GM |
326 | { |
327 | char *buf; | |
177c0ea7 | 328 | |
9b0e97aa GM |
329 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
330 | history_idx = 0; | |
331 | buf = redisplay_history[history_idx].trace; | |
332 | ++history_idx; | |
177c0ea7 | 333 | |
9b0e97aa GM |
334 | sprintf (buf, "%d: update frame %p%s", |
335 | history_tick++, | |
336 | f, paused_p ? " ***paused***" : ""); | |
337 | } | |
338 | ||
339 | ||
340 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, | |
341 | Sdump_redisplay_history, 0, 0, "", | |
7ee72033 | 342 | doc: /* Dump redisplay history to stderr. */) |
5842a27b | 343 | (void) |
9b0e97aa GM |
344 | { |
345 | int i; | |
346 | ||
347 | for (i = history_idx - 1; i != history_idx; --i) | |
348 | { | |
349 | if (i < 0) | |
350 | i = REDISPLAY_HISTORY_SIZE - 1; | |
351 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
352 | } | |
353 | ||
354 | return Qnil; | |
355 | } | |
356 | ||
357 | ||
5f5c8ee5 | 358 | #else /* GLYPH_DEBUG == 0 */ |
4588ec20 | 359 | |
7df02016 KS |
360 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
361 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 362 | |
5f5c8ee5 | 363 | #endif /* GLYPH_DEBUG == 0 */ |
4588ec20 | 364 | |
4588ec20 | 365 | |
dcc19aac | 366 | #if defined PROFILING && !HAVE___EXECUTABLE_START |
72af86bd | 367 | /* FIXME: only used to find text start for profiling. */ |
4588ec20 JB |
368 | |
369 | void | |
971de7fb | 370 | safe_bcopy (const char *from, char *to, int size) |
4588ec20 | 371 | { |
72af86bd | 372 | abort (); |
177c0ea7 | 373 | } |
72af86bd | 374 | #endif |
5f5c8ee5 GM |
375 | \f |
376 | /*********************************************************************** | |
377 | Glyph Matrices | |
378 | ***********************************************************************/ | |
379 | ||
380 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
381 | pool from which memory for the matrix should be allocated, or null | |
382 | for window-based redisplay where no glyph pools are used. The | |
383 | member `pool' of the glyph matrix structure returned is set to | |
384 | POOL, the structure is otherwise zeroed. */ | |
385 | ||
386 | struct glyph_matrix * | |
971de7fb | 387 | new_glyph_matrix (struct glyph_pool *pool) |
4588ec20 | 388 | { |
5f5c8ee5 GM |
389 | struct glyph_matrix *result; |
390 | ||
391 | /* Allocate and clear. */ | |
392 | result = (struct glyph_matrix *) xmalloc (sizeof *result); | |
72af86bd | 393 | memset (result, 0, sizeof *result); |
4588ec20 | 394 | |
5f5c8ee5 GM |
395 | /* Increment number of allocated matrices. This count is used |
396 | to detect memory leaks. */ | |
397 | ++glyph_matrix_count; | |
4588ec20 | 398 | |
5f5c8ee5 GM |
399 | /* Set pool and return. */ |
400 | result->pool = pool; | |
401 | return result; | |
4588ec20 JB |
402 | } |
403 | ||
4588ec20 | 404 | |
5f5c8ee5 GM |
405 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
406 | ||
407 | The global counter glyph_matrix_count is decremented when a matrix | |
408 | is freed. If the count gets negative, more structures were freed | |
409 | than allocated, i.e. one matrix was freed more than once or a bogus | |
410 | pointer was passed to this function. | |
177c0ea7 | 411 | |
5f5c8ee5 GM |
412 | If MATRIX->pool is null, this means that the matrix manages its own |
413 | glyph memory---this is done for matrices on X frames. Freeing the | |
414 | matrix also frees the glyph memory in this case. */ | |
415 | ||
416 | static void | |
971de7fb | 417 | free_glyph_matrix (struct glyph_matrix *matrix) |
4588ec20 | 418 | { |
5f5c8ee5 GM |
419 | if (matrix) |
420 | { | |
421 | int i; | |
422 | ||
423 | /* Detect the case that more matrices are freed than were | |
424 | allocated. */ | |
425 | if (--glyph_matrix_count < 0) | |
426 | abort (); | |
427 | ||
428 | /* Free glyph memory if MATRIX owns it. */ | |
429 | if (matrix->pool == NULL) | |
430 | for (i = 0; i < matrix->rows_allocated; ++i) | |
431 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 432 | |
5f5c8ee5 GM |
433 | /* Free row structures and the matrix itself. */ |
434 | xfree (matrix->rows); | |
435 | xfree (matrix); | |
436 | } | |
437 | } | |
4588ec20 | 438 | |
4588ec20 | 439 | |
5f5c8ee5 GM |
440 | /* Return the number of glyphs to reserve for a marginal area of |
441 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
442 | display line of window W. MARGIN gives the width of the marginal | |
443 | area in canonical character units. MARGIN should be an integer | |
444 | or a float. */ | |
445 | ||
446 | static int | |
971de7fb | 447 | margin_glyphs_to_reserve (struct window *w, int total_glyphs, Lisp_Object margin) |
5f5c8ee5 GM |
448 | { |
449 | int n; | |
4588ec20 | 450 | |
5f5c8ee5 | 451 | if (NUMBERP (margin)) |
4588ec20 | 452 | { |
7df02016 | 453 | int width = XFASTINT (w->total_cols); |
5f5c8ee5 GM |
454 | double d = max (0, XFLOATINT (margin)); |
455 | d = min (width / 2 - 1, d); | |
35ec832e | 456 | n = (int) ((double) total_glyphs / width * d); |
5f5c8ee5 GM |
457 | } |
458 | else | |
459 | n = 0; | |
460 | ||
461 | return n; | |
462 | } | |
463 | ||
4588ec20 | 464 | |
5f5c8ee5 GM |
465 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
466 | window sizes. | |
4588ec20 | 467 | |
5f5c8ee5 GM |
468 | W is null if the function is called for a frame glyph matrix. |
469 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
470 | indices of the first column and row of MATRIX within the frame | |
471 | matrix, if such a matrix exists. They are zero for purely | |
472 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 473 | |
5f5c8ee5 GM |
474 | In window-based redisplay, where no frame matrices exist, glyph |
475 | matrices manage their own glyph storage. Otherwise, they allocate | |
476 | storage from a common frame glyph pool which can be found in | |
477 | MATRIX->pool. | |
23b0200c | 478 | |
5f5c8ee5 GM |
479 | The reason for this memory management strategy is to avoid complete |
480 | frame redraws if possible. When we allocate from a common pool, a | |
481 | change of the location or size of a sub-matrix within the pool | |
482 | requires a complete redisplay of the frame because we cannot easily | |
483 | make sure that the current matrices of all windows still agree with | |
484 | what is displayed on the screen. While this is usually fast, it | |
485 | leads to screen flickering. */ | |
23b0200c | 486 | |
5f5c8ee5 | 487 | static void |
971de7fb | 488 | adjust_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int x, int y, struct dim dim) |
5f5c8ee5 GM |
489 | { |
490 | int i; | |
491 | int new_rows; | |
492 | int marginal_areas_changed_p = 0; | |
045dee35 GM |
493 | int header_line_changed_p = 0; |
494 | int header_line_p = 0; | |
5f5c8ee5 | 495 | int left = -1, right = -1; |
ca8a12a7 | 496 | int window_width = -1, window_height = -1; |
5f5c8ee5 | 497 | |
6b61353c KH |
498 | /* See if W had a header line that has disappeared now, or vice versa. |
499 | Get W's size. */ | |
5f5c8ee5 GM |
500 | if (w) |
501 | { | |
6b61353c KH |
502 | window_box (w, -1, 0, 0, &window_width, &window_height); |
503 | ||
045dee35 GM |
504 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
505 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 506 | } |
045dee35 | 507 | matrix->header_line_p = header_line_p; |
23b0200c | 508 | |
6b61353c KH |
509 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
510 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
511 | haven't changed. This optimization is important because preserving |
512 | the matrix means preventing redisplay. */ | |
513 | if (matrix->pool == NULL) | |
514 | { | |
7df02016 KS |
515 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
516 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
5f5c8ee5 GM |
517 | xassert (left >= 0 && right >= 0); |
518 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs | |
519 | || right != matrix->right_margin_glyphs); | |
520 | ||
521 | if (!marginal_areas_changed_p | |
522 | && !fonts_changed_p | |
045dee35 | 523 | && !header_line_changed_p |
7df02016 KS |
524 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
525 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
526 | && matrix->window_height == window_height |
527 | && matrix->window_vscroll == w->vscroll | |
528 | && matrix->window_width == window_width) | |
529 | return; | |
530 | } | |
177c0ea7 | 531 | |
5f5c8ee5 GM |
532 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
533 | if (matrix->rows_allocated < dim.height) | |
534 | { | |
535 | int size = dim.height * sizeof (struct glyph_row); | |
536 | new_rows = dim.height - matrix->rows_allocated; | |
537 | matrix->rows = (struct glyph_row *) xrealloc (matrix->rows, size); | |
72af86bd AS |
538 | memset (matrix->rows + matrix->rows_allocated, 0, |
539 | new_rows * sizeof *matrix->rows); | |
5f5c8ee5 GM |
540 | matrix->rows_allocated = dim.height; |
541 | } | |
542 | else | |
543 | new_rows = 0; | |
60a8948a | 544 | |
5f5c8ee5 GM |
545 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
546 | on a frame not using window-based redisplay. Set up pointers for | |
547 | each row into the glyph pool. */ | |
548 | if (matrix->pool) | |
549 | { | |
550 | xassert (matrix->pool->glyphs); | |
177c0ea7 | 551 | |
5f5c8ee5 | 552 | if (w) |
60a8948a | 553 | { |
5f5c8ee5 | 554 | left = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 555 | w->left_margin_cols); |
5f5c8ee5 | 556 | right = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 557 | w->right_margin_cols); |
60a8948a | 558 | } |
5f5c8ee5 GM |
559 | else |
560 | left = right = 0; | |
177c0ea7 | 561 | |
5f5c8ee5 | 562 | for (i = 0; i < dim.height; ++i) |
60a8948a | 563 | { |
5f5c8ee5 | 564 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
565 | |
566 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
567 | = (matrix->pool->glyphs |
568 | + (y + i) * matrix->pool->ncolumns | |
569 | + x); | |
177c0ea7 | 570 | |
5f5c8ee5 GM |
571 | if (w == NULL |
572 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 573 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
574 | { |
575 | row->glyphs[TEXT_AREA] | |
576 | = row->glyphs[LEFT_MARGIN_AREA]; | |
577 | row->glyphs[RIGHT_MARGIN_AREA] | |
578 | = row->glyphs[TEXT_AREA] + dim.width; | |
579 | row->glyphs[LAST_AREA] | |
580 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
581 | } | |
582 | else | |
583 | { | |
584 | row->glyphs[TEXT_AREA] | |
585 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
586 | row->glyphs[RIGHT_MARGIN_AREA] | |
587 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
588 | row->glyphs[LAST_AREA] | |
589 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
590 | } | |
60a8948a | 591 | } |
177c0ea7 | 592 | |
5f5c8ee5 GM |
593 | matrix->left_margin_glyphs = left; |
594 | matrix->right_margin_glyphs = right; | |
595 | } | |
596 | else | |
597 | { | |
598 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
6b61353c KH |
599 | its own memory. It is a window matrix for window-based redisplay. |
600 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
601 | if (dim.width > matrix->matrix_w |
602 | || new_rows | |
045dee35 | 603 | || header_line_changed_p |
5f5c8ee5 | 604 | || marginal_areas_changed_p) |
4588ec20 | 605 | { |
5f5c8ee5 GM |
606 | struct glyph_row *row = matrix->rows; |
607 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 608 | |
5f5c8ee5 GM |
609 | while (row < end) |
610 | { | |
611 | row->glyphs[LEFT_MARGIN_AREA] | |
612 | = (struct glyph *) xrealloc (row->glyphs[LEFT_MARGIN_AREA], | |
613 | (dim.width | |
614 | * sizeof (struct glyph))); | |
177c0ea7 | 615 | |
5f5c8ee5 GM |
616 | /* The mode line never has marginal areas. */ |
617 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 618 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
619 | { |
620 | row->glyphs[TEXT_AREA] | |
621 | = row->glyphs[LEFT_MARGIN_AREA]; | |
622 | row->glyphs[RIGHT_MARGIN_AREA] | |
623 | = row->glyphs[TEXT_AREA] + dim.width; | |
624 | row->glyphs[LAST_AREA] | |
625 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
626 | } | |
627 | else | |
628 | { | |
629 | row->glyphs[TEXT_AREA] | |
630 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
631 | row->glyphs[RIGHT_MARGIN_AREA] | |
632 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
633 | row->glyphs[LAST_AREA] | |
634 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
635 | } | |
636 | ++row; | |
637 | } | |
4588ec20 JB |
638 | } |
639 | ||
5f5c8ee5 GM |
640 | xassert (left >= 0 && right >= 0); |
641 | matrix->left_margin_glyphs = left; | |
642 | matrix->right_margin_glyphs = right; | |
643 | } | |
177c0ea7 | 644 | |
5f5c8ee5 GM |
645 | /* Number of rows to be used by MATRIX. */ |
646 | matrix->nrows = dim.height; | |
3ed36514 | 647 | xassert (matrix->nrows >= 0); |
5f5c8ee5 | 648 | |
b7b20fbd | 649 | if (w) |
5f5c8ee5 | 650 | { |
b7b20fbd | 651 | if (matrix == w->current_matrix) |
4588ec20 | 652 | { |
b7b20fbd GM |
653 | /* Mark rows in a current matrix of a window as not having |
654 | valid contents. It's important to not do this for | |
655 | desired matrices. When Emacs starts, it may already be | |
656 | building desired matrices when this function runs. */ | |
657 | if (window_width < 0) | |
658 | window_width = window_box_width (w, -1); | |
177c0ea7 | 659 | |
b7b20fbd GM |
660 | /* Optimize the case that only the height has changed (C-x 2, |
661 | upper window). Invalidate all rows that are no longer part | |
662 | of the window. */ | |
663 | if (!marginal_areas_changed_p | |
73d75a62 GM |
664 | && !header_line_changed_p |
665 | && new_rows == 0 | |
666 | && dim.width == matrix->matrix_w | |
7df02016 KS |
667 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
668 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 669 | && matrix->window_width == window_width) |
b7b20fbd | 670 | { |
dd42b31a GM |
671 | /* Find the last row in the window. */ |
672 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
673 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
674 | { | |
26447967 | 675 | ++i; |
dd42b31a GM |
676 | break; |
677 | } | |
b7b20fbd GM |
678 | |
679 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 680 | are invalidated below. */ |
b7b20fbd GM |
681 | if (INTEGERP (w->window_end_vpos) |
682 | && XFASTINT (w->window_end_vpos) >= i) | |
683 | w->window_end_valid = Qnil; | |
177c0ea7 | 684 | |
b7b20fbd GM |
685 | while (i < matrix->nrows) |
686 | matrix->rows[i++].enabled_p = 0; | |
687 | } | |
688 | else | |
689 | { | |
690 | for (i = 0; i < matrix->nrows; ++i) | |
691 | matrix->rows[i].enabled_p = 0; | |
692 | } | |
5f5c8ee5 | 693 | } |
b7b20fbd | 694 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 695 | { |
b7b20fbd GM |
696 | /* Rows in desired matrices always have to be cleared; |
697 | redisplay expects this is the case when it runs, so it | |
698 | had better be the case when we adjust matrices between | |
699 | redisplays. */ | |
5f5c8ee5 GM |
700 | for (i = 0; i < matrix->nrows; ++i) |
701 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 702 | } |
4588ec20 | 703 | } |
177c0ea7 JB |
704 | |
705 | ||
5f5c8ee5 GM |
706 | /* Remember last values to be able to optimize frame redraws. */ |
707 | matrix->matrix_x = x; | |
708 | matrix->matrix_y = y; | |
709 | matrix->matrix_w = dim.width; | |
710 | matrix->matrix_h = dim.height; | |
711 | ||
712 | /* Record the top y location and height of W at the time the matrix | |
713 | was last adjusted. This is used to optimize redisplay above. */ | |
714 | if (w) | |
4588ec20 | 715 | { |
7df02016 KS |
716 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
717 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
718 | matrix->window_height = window_height; |
719 | matrix->window_width = window_width; | |
720 | matrix->window_vscroll = w->vscroll; | |
721 | } | |
722 | } | |
4588ec20 | 723 | |
4588ec20 | 724 | |
5f5c8ee5 GM |
725 | /* Reverse the contents of rows in MATRIX between START and END. The |
726 | contents of the row at END - 1 end up at START, END - 2 at START + | |
727 | 1 etc. This is part of the implementation of rotate_matrix (see | |
728 | below). */ | |
d52bad65 | 729 | |
5f5c8ee5 | 730 | static void |
971de7fb | 731 | reverse_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 GM |
732 | { |
733 | int i, j; | |
23b0200c | 734 | |
5f5c8ee5 GM |
735 | for (i = start, j = end - 1; i < j; ++i, --j) |
736 | { | |
737 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
738 | initialization. */ | |
739 | struct glyph_row temp; | |
740 | temp = matrix->rows[i]; | |
741 | matrix->rows[i] = matrix->rows[j]; | |
742 | matrix->rows[j] = temp; | |
743 | } | |
744 | } | |
23b0200c | 745 | |
23b0200c | 746 | |
5f5c8ee5 GM |
747 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
748 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
749 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
750 | row structures are moved around). | |
60a8948a | 751 | |
5f5c8ee5 GM |
752 | The algorithm used for rotating the vector was, I believe, first |
753 | described by Kernighan. See the vector R as consisting of two | |
754 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
755 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
756 | and reverse the result to get (ArBr)r which is BA. Similar for | |
757 | rotating right. */ | |
758 | ||
759 | void | |
971de7fb | 760 | rotate_matrix (struct glyph_matrix *matrix, int first, int last, int by) |
5f5c8ee5 GM |
761 | { |
762 | if (by < 0) | |
763 | { | |
764 | /* Up (rotate left, i.e. towards lower indices). */ | |
765 | by = -by; | |
766 | reverse_rows (matrix, first, first + by); | |
767 | reverse_rows (matrix, first + by, last); | |
768 | reverse_rows (matrix, first, last); | |
769 | } | |
770 | else if (by > 0) | |
771 | { | |
772 | /* Down (rotate right, i.e. towards higher indices). */ | |
773 | reverse_rows (matrix, last - by, last); | |
774 | reverse_rows (matrix, first, last - by); | |
775 | reverse_rows (matrix, first, last); | |
776 | } | |
777 | } | |
778 | ||
779 | ||
780 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
781 | with indices START <= index < END. Increment positions by DELTA/ | |
782 | DELTA_BYTES. */ | |
783 | ||
784 | void | |
ace1712c EZ |
785 | increment_matrix_positions (struct glyph_matrix *matrix, int start, int end, |
786 | EMACS_INT delta, EMACS_INT delta_bytes) | |
5f5c8ee5 GM |
787 | { |
788 | /* Check that START and END are reasonable values. */ | |
789 | xassert (start >= 0 && start <= matrix->nrows); | |
790 | xassert (end >= 0 && end <= matrix->nrows); | |
791 | xassert (start <= end); | |
792 | ||
793 | for (; start < end; ++start) | |
86c11ba1 | 794 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
795 | } |
796 | ||
797 | ||
798 | /* Enable a range of rows in glyph matrix MATRIX. START and END are | |
799 | the row indices of the first and last + 1 row to enable. If | |
800 | ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */ | |
801 | ||
802 | void | |
971de7fb | 803 | enable_glyph_matrix_rows (struct glyph_matrix *matrix, int start, int end, int enabled_p) |
5f5c8ee5 | 804 | { |
3ed36514 GM |
805 | xassert (start <= end); |
806 | xassert (start >= 0 && start < matrix->nrows); | |
807 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 808 | |
5f5c8ee5 GM |
809 | for (; start < end; ++start) |
810 | matrix->rows[start].enabled_p = enabled_p != 0; | |
811 | } | |
812 | ||
813 | ||
814 | /* Clear MATRIX. | |
815 | ||
816 | This empties all rows in MATRIX by setting the enabled_p flag for | |
817 | all rows of the matrix to zero. The function prepare_desired_row | |
818 | will eventually really clear a row when it sees one with a zero | |
819 | enabled_p flag. | |
820 | ||
821 | Resets update hints to defaults value. The only update hint | |
822 | currently present is the flag MATRIX->no_scrolling_p. */ | |
823 | ||
824 | void | |
971de7fb | 825 | clear_glyph_matrix (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
826 | { |
827 | if (matrix) | |
828 | { | |
829 | enable_glyph_matrix_rows (matrix, 0, matrix->nrows, 0); | |
830 | matrix->no_scrolling_p = 0; | |
831 | } | |
832 | } | |
177c0ea7 | 833 | |
5f5c8ee5 GM |
834 | |
835 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
836 | Increment y-positions in glyph rows between START and END by DY, | |
837 | and recompute their visible height. */ | |
838 | ||
839 | void | |
971de7fb | 840 | shift_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int start, int end, int dy) |
5f5c8ee5 GM |
841 | { |
842 | int min_y, max_y; | |
177c0ea7 | 843 | |
5f5c8ee5 GM |
844 | xassert (start <= end); |
845 | xassert (start >= 0 && start < matrix->nrows); | |
846 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 847 | |
7df02016 KS |
848 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
849 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 850 | |
5f5c8ee5 GM |
851 | for (; start < end; ++start) |
852 | { | |
853 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 854 | |
5f5c8ee5 | 855 | row->y += dy; |
d6c747a4 | 856 | row->visible_height = row->height; |
177c0ea7 | 857 | |
5f5c8ee5 | 858 | if (row->y < min_y) |
d6c747a4 GM |
859 | row->visible_height -= min_y - row->y; |
860 | if (row->y + row->height > max_y) | |
861 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
862 | } |
863 | } | |
864 | ||
865 | ||
866 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
867 | invalid is done by setting enabled_p to zero for all rows in a | |
868 | current matrix. */ | |
869 | ||
870 | void | |
971de7fb | 871 | clear_current_matrices (register struct frame *f) |
5f5c8ee5 GM |
872 | { |
873 | /* Clear frame current matrix, if we have one. */ | |
874 | if (f->current_matrix) | |
875 | clear_glyph_matrix (f->current_matrix); | |
876 | ||
877 | /* Clear the matrix of the menu bar window, if such a window exists. | |
878 | The menu bar window is currently used to display menus on X when | |
879 | no toolkit support is compiled in. */ | |
880 | if (WINDOWP (f->menu_bar_window)) | |
881 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
882 | ||
9ea173e8 GM |
883 | /* Clear the matrix of the tool-bar window, if any. */ |
884 | if (WINDOWP (f->tool_bar_window)) | |
885 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
5f5c8ee5 GM |
886 | |
887 | /* Clear current window matrices. */ | |
888 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
889 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); | |
890 | } | |
891 | ||
892 | ||
893 | /* Clear out all display lines of F for a coming redisplay. */ | |
894 | ||
895 | void | |
971de7fb | 896 | clear_desired_matrices (register struct frame *f) |
5f5c8ee5 GM |
897 | { |
898 | if (f->desired_matrix) | |
899 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 900 | |
5f5c8ee5 GM |
901 | if (WINDOWP (f->menu_bar_window)) |
902 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
903 | ||
9ea173e8 GM |
904 | if (WINDOWP (f->tool_bar_window)) |
905 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
5f5c8ee5 GM |
906 | |
907 | /* Do it for window matrices. */ | |
908 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
909 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
910 | } | |
911 | ||
912 | ||
913 | /* Clear matrices in window tree rooted in W. If DESIRED_P is | |
914 | non-zero clear desired matrices, otherwise clear current matrices. */ | |
915 | ||
916 | static void | |
971de7fb | 917 | clear_window_matrices (struct window *w, int desired_p) |
5f5c8ee5 GM |
918 | { |
919 | while (w) | |
920 | { | |
921 | if (!NILP (w->hchild)) | |
922 | { | |
923 | xassert (WINDOWP (w->hchild)); | |
924 | clear_window_matrices (XWINDOW (w->hchild), desired_p); | |
925 | } | |
926 | else if (!NILP (w->vchild)) | |
927 | { | |
928 | xassert (WINDOWP (w->vchild)); | |
929 | clear_window_matrices (XWINDOW (w->vchild), desired_p); | |
930 | } | |
931 | else | |
932 | { | |
933 | if (desired_p) | |
934 | clear_glyph_matrix (w->desired_matrix); | |
935 | else | |
936 | { | |
937 | clear_glyph_matrix (w->current_matrix); | |
938 | w->window_end_valid = Qnil; | |
939 | } | |
940 | } | |
941 | ||
942 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
943 | } | |
944 | } | |
945 | ||
946 | ||
947 | \f | |
948 | /*********************************************************************** | |
949 | Glyph Rows | |
950 | ||
951 | See dispextern.h for an overall explanation of glyph rows. | |
952 | ***********************************************************************/ | |
953 | ||
954 | /* Clear glyph row ROW. Do it in a way that makes it robust against | |
955 | changes in the glyph_row structure, i.e. addition or removal of | |
956 | structure members. */ | |
957 | ||
2cca872d KH |
958 | static struct glyph_row null_row; |
959 | ||
5f5c8ee5 | 960 | void |
971de7fb | 961 | clear_glyph_row (struct glyph_row *row) |
5f5c8ee5 GM |
962 | { |
963 | struct glyph *p[1 + LAST_AREA]; | |
5f5c8ee5 GM |
964 | |
965 | /* Save pointers. */ | |
966 | p[LEFT_MARGIN_AREA] = row->glyphs[LEFT_MARGIN_AREA]; | |
967 | p[TEXT_AREA] = row->glyphs[TEXT_AREA]; | |
968 | p[RIGHT_MARGIN_AREA] = row->glyphs[RIGHT_MARGIN_AREA]; | |
969 | p[LAST_AREA] = row->glyphs[LAST_AREA]; | |
970 | ||
971 | /* Clear. */ | |
972 | *row = null_row; | |
973 | ||
974 | /* Restore pointers. */ | |
975 | row->glyphs[LEFT_MARGIN_AREA] = p[LEFT_MARGIN_AREA]; | |
976 | row->glyphs[TEXT_AREA] = p[TEXT_AREA]; | |
977 | row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA]; | |
978 | row->glyphs[LAST_AREA] = p[LAST_AREA]; | |
45560b1a GM |
979 | |
980 | #if 0 /* At some point, some bit-fields of struct glyph were not set, | |
981 | which made glyphs unequal when compared with GLYPH_EQUAL_P. | |
982 | Redisplay outputs such glyphs, and flickering effects were | |
983 | the result. This also depended on the contents of memory | |
984 | returned by xmalloc. If flickering happens again, activate | |
153a073c | 985 | the code below. If the flickering is gone with that, chances |
45560b1a | 986 | are that the flickering has the same reason as here. */ |
72af86bd | 987 | memset (p[0], 0, (char *) p[LAST_AREA] - (char *) p[0]); |
45560b1a | 988 | #endif |
5f5c8ee5 GM |
989 | } |
990 | ||
991 | ||
992 | /* Make ROW an empty, enabled row of canonical character height, | |
993 | in window W starting at y-position Y. */ | |
994 | ||
995 | void | |
971de7fb | 996 | blank_row (struct window *w, struct glyph_row *row, int y) |
5f5c8ee5 GM |
997 | { |
998 | int min_y, max_y; | |
177c0ea7 | 999 | |
7df02016 KS |
1000 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
1001 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 1002 | |
5f5c8ee5 GM |
1003 | clear_glyph_row (row); |
1004 | row->y = y; | |
408f5064 | 1005 | row->ascent = row->phys_ascent = 0; |
7df02016 | 1006 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 1007 | row->visible_height = row->height; |
177c0ea7 | 1008 | |
5f5c8ee5 | 1009 | if (row->y < min_y) |
d6c747a4 GM |
1010 | row->visible_height -= min_y - row->y; |
1011 | if (row->y + row->height > max_y) | |
1012 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
1013 | |
1014 | row->enabled_p = 1; | |
1015 | } | |
1016 | ||
1017 | ||
1018 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
1019 | are the amounts by which to change positions. Note that the first | |
1020 | glyph of the text area of a row can have a buffer position even if | |
1021 | the used count of the text area is zero. Such rows display line | |
1022 | ends. */ | |
1023 | ||
1024 | void | |
ace1712c EZ |
1025 | increment_row_positions (struct glyph_row *row, |
1026 | EMACS_INT delta, EMACS_INT delta_bytes) | |
5f5c8ee5 GM |
1027 | { |
1028 | int area, i; | |
1029 | ||
1030 | /* Increment start and end positions. */ | |
1031 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
1032 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
1033 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
1034 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
d36fe237 EZ |
1035 | CHARPOS (row->start.pos) += delta; |
1036 | BYTEPOS (row->start.pos) += delta_bytes; | |
1037 | CHARPOS (row->end.pos) += delta; | |
1038 | BYTEPOS (row->end.pos) += delta_bytes; | |
5f5c8ee5 | 1039 | |
5cacdcfd KS |
1040 | if (!row->enabled_p) |
1041 | return; | |
1042 | ||
5f5c8ee5 GM |
1043 | /* Increment positions in glyphs. */ |
1044 | for (area = 0; area < LAST_AREA; ++area) | |
1045 | for (i = 0; i < row->used[area]; ++i) | |
1046 | if (BUFFERP (row->glyphs[area][i].object) | |
1047 | && row->glyphs[area][i].charpos > 0) | |
1048 | row->glyphs[area][i].charpos += delta; | |
1049 | ||
1050 | /* Capture the case of rows displaying a line end. */ | |
1051 | if (row->used[TEXT_AREA] == 0 | |
1052 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1053 | row->glyphs[TEXT_AREA]->charpos += delta; | |
1054 | } | |
1055 | ||
1056 | ||
9af3e742 | 1057 | #if 0 |
5f5c8ee5 GM |
1058 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
1059 | contents, i.e. glyph structure contents are exchanged between A and | |
1060 | B without changing glyph pointers in A and B. */ | |
1061 | ||
1062 | static void | |
1063 | swap_glyphs_in_rows (a, b) | |
1064 | struct glyph_row *a, *b; | |
1065 | { | |
1066 | int area; | |
1067 | ||
1068 | for (area = 0; area < LAST_AREA; ++area) | |
1069 | { | |
1070 | /* Number of glyphs to swap. */ | |
1071 | int max_used = max (a->used[area], b->used[area]); | |
1072 | ||
1073 | /* Start of glyphs in area of row A. */ | |
1074 | struct glyph *glyph_a = a->glyphs[area]; | |
1075 | ||
1076 | /* End + 1 of glyphs in area of row A. */ | |
1077 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
1078 | ||
1079 | /* Start of glyphs in area of row B. */ | |
1080 | struct glyph *glyph_b = b->glyphs[area]; | |
1081 | ||
1082 | while (glyph_a < glyph_a_end) | |
1083 | { | |
1084 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
1085 | initialization. */ | |
1086 | struct glyph temp; | |
1087 | temp = *glyph_a; | |
1088 | *glyph_a = *glyph_b; | |
1089 | *glyph_b = temp; | |
1090 | ++glyph_a; | |
1091 | ++glyph_b; | |
1092 | } | |
1093 | } | |
1094 | } | |
1095 | ||
9af3e742 | 1096 | #endif /* 0 */ |
5f5c8ee5 GM |
1097 | |
1098 | /* Exchange pointers to glyph memory between glyph rows A and B. */ | |
1099 | ||
1100 | static INLINE void | |
971de7fb | 1101 | swap_glyph_pointers (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1102 | { |
1103 | int i; | |
1104 | for (i = 0; i < LAST_AREA + 1; ++i) | |
1105 | { | |
1106 | struct glyph *temp = a->glyphs[i]; | |
1107 | a->glyphs[i] = b->glyphs[i]; | |
1108 | b->glyphs[i] = temp; | |
1109 | } | |
1110 | } | |
1111 | ||
1112 | ||
1113 | /* Copy glyph row structure FROM to glyph row structure TO, except | |
1114 | that glyph pointers in the structures are left unchanged. */ | |
1115 | ||
b6557553 | 1116 | static INLINE void |
971de7fb | 1117 | copy_row_except_pointers (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1118 | { |
1119 | struct glyph *pointers[1 + LAST_AREA]; | |
1120 | ||
1121 | /* Save glyph pointers of TO. */ | |
72af86bd | 1122 | memcpy (pointers, to->glyphs, sizeof to->glyphs); |
5f5c8ee5 GM |
1123 | |
1124 | /* Do a structure assignment. */ | |
1125 | *to = *from; | |
1126 | ||
1127 | /* Restore original pointers of TO. */ | |
72af86bd | 1128 | memcpy (to->glyphs, pointers, sizeof to->glyphs); |
5f5c8ee5 GM |
1129 | } |
1130 | ||
1131 | ||
5f5c8ee5 GM |
1132 | /* Assign glyph row FROM to glyph row TO. This works like a structure |
1133 | assignment TO = FROM, except that glyph pointers are not copied but | |
1134 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1135 | a memory leak. */ | |
1136 | ||
1137 | static INLINE void | |
971de7fb | 1138 | assign_row (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1139 | { |
1140 | swap_glyph_pointers (to, from); | |
1141 | copy_row_except_pointers (to, from); | |
1142 | } | |
1143 | ||
1144 | ||
1145 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1146 | a row in a window matrix, is a slice of the glyph memory of the | |
1147 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
1148 | is non-zero if the glyph memory of WINDOW_ROW is part of the glyph | |
1149 | memory of FRAME_ROW. */ | |
1150 | ||
2d5912c1 | 1151 | #if GLYPH_DEBUG |
9339e87f | 1152 | |
5f5c8ee5 | 1153 | static int |
59fc5cf9 | 1154 | glyph_row_slice_p (struct glyph_row *window_row, struct glyph_row *frame_row) |
5f5c8ee5 GM |
1155 | { |
1156 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1157 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1158 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1159 | ||
1160 | return (frame_glyph_start <= window_glyph_start | |
1161 | && window_glyph_start < frame_glyph_end); | |
1162 | } | |
1163 | ||
9339e87f | 1164 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1165 | |
9af3e742 GM |
1166 | #if 0 |
1167 | ||
5f5c8ee5 GM |
1168 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1169 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1170 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1171 | ||
1172 | static struct glyph_row * | |
59fc5cf9 AS |
1173 | find_glyph_row_slice (struct glyph_matrix *window_matrix, |
1174 | struct glyph_matrix *frame_matrix, int row) | |
5f5c8ee5 GM |
1175 | { |
1176 | int i; | |
1177 | ||
1178 | xassert (row >= 0 && row < frame_matrix->nrows); | |
1179 | ||
1180 | for (i = 0; i < window_matrix->nrows; ++i) | |
1181 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1182 | frame_matrix->rows + row)) | |
1183 | break; | |
1184 | ||
1185 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1186 | } | |
1187 | ||
9af3e742 | 1188 | #endif /* 0 */ |
5f5c8ee5 GM |
1189 | |
1190 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1191 | i.e. they are only marked as to be cleared by setting their | |
1192 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1193 | call to this function really clears it. */ | |
1194 | ||
1195 | void | |
971de7fb | 1196 | prepare_desired_row (struct glyph_row *row) |
5f5c8ee5 GM |
1197 | { |
1198 | if (!row->enabled_p) | |
1199 | { | |
5009f85e EZ |
1200 | unsigned rp = row->reversed_p; |
1201 | ||
5f5c8ee5 GM |
1202 | clear_glyph_row (row); |
1203 | row->enabled_p = 1; | |
5009f85e | 1204 | row->reversed_p = rp; |
5f5c8ee5 GM |
1205 | } |
1206 | } | |
1207 | ||
1208 | ||
1209 | /* Return a hash code for glyph row ROW. */ | |
1210 | ||
2f7c71a1 | 1211 | static int |
971de7fb | 1212 | line_hash_code (struct glyph_row *row) |
5f5c8ee5 GM |
1213 | { |
1214 | int hash = 0; | |
177c0ea7 | 1215 | |
5f5c8ee5 GM |
1216 | if (row->enabled_p) |
1217 | { | |
4cecaab8 MB |
1218 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1219 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1220 | ||
1221 | while (glyph < end) | |
1222 | { | |
1223 | int c = glyph->u.ch; | |
1224 | int face_id = glyph->face_id; | |
daf01701 | 1225 | if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
4cecaab8 MB |
1226 | c -= SPACEGLYPH; |
1227 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1228 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1229 | ++glyph; | |
1230 | } | |
5f5c8ee5 | 1231 | |
4cecaab8 MB |
1232 | if (hash == 0) |
1233 | hash = 1; | |
5f5c8ee5 GM |
1234 | } |
1235 | ||
1236 | return hash; | |
1237 | } | |
1238 | ||
1239 | ||
153a073c | 1240 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1241 | the number of characters in the line. If must_write_spaces is |
1242 | zero, leading and trailing spaces are ignored. */ | |
1243 | ||
1244 | static unsigned int | |
971de7fb | 1245 | line_draw_cost (struct glyph_matrix *matrix, int vpos) |
5f5c8ee5 GM |
1246 | { |
1247 | struct glyph_row *row = matrix->rows + vpos; | |
1248 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1249 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1250 | int len; | |
1251 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
1252 | int glyph_table_len = GLYPH_TABLE_LENGTH; | |
1253 | ||
1254 | /* Ignore trailing and leading spaces if we can. */ | |
daf01701 | 1255 | if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
5f5c8ee5 GM |
1256 | { |
1257 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1258 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1259 | --end; |
1260 | ||
177c0ea7 | 1261 | /* All blank line. */ |
5f5c8ee5 GM |
1262 | if (end == beg) |
1263 | return 0; | |
1264 | ||
1265 | /* Skip over leading spaces. */ | |
1266 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1267 | ++beg; | |
1268 | } | |
1269 | ||
1270 | /* If we don't have a glyph-table, each glyph is one character, | |
1271 | so return the number of glyphs. */ | |
1272 | if (glyph_table_base == 0) | |
1273 | len = end - beg; | |
1274 | else | |
1275 | { | |
1276 | /* Otherwise, scan the glyphs and accumulate their total length | |
1277 | in LEN. */ | |
1278 | len = 0; | |
1279 | while (beg < end) | |
1280 | { | |
3fc809e2 | 1281 | GLYPH g; |
177c0ea7 | 1282 | |
3fc809e2 KS |
1283 | SET_GLYPH_FROM_CHAR_GLYPH (g, *beg); |
1284 | ||
565b39a8 | 1285 | if (GLYPH_INVALID_P (g) |
42186983 | 1286 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) |
5f5c8ee5 GM |
1287 | len += 1; |
1288 | else | |
1289 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1290 | |
5f5c8ee5 GM |
1291 | ++beg; |
1292 | } | |
1293 | } | |
177c0ea7 | 1294 | |
5f5c8ee5 GM |
1295 | return len; |
1296 | } | |
1297 | ||
1298 | ||
1299 | /* Test two glyph rows A and B for equality. Value is non-zero if A | |
1300 | and B have equal contents. W is the window to which the glyphs | |
1301 | rows A and B belong. It is needed here to test for partial row | |
e4e0bee9 GM |
1302 | visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p |
1303 | flags of A and B, too. */ | |
5f5c8ee5 | 1304 | |
177c0ea7 | 1305 | static INLINE int |
971de7fb | 1306 | row_equal_p (struct window *w, struct glyph_row *a, struct glyph_row *b, int mouse_face_p) |
5f5c8ee5 GM |
1307 | { |
1308 | if (a == b) | |
1309 | return 1; | |
1310 | else if (a->hash != b->hash) | |
1311 | return 0; | |
1312 | else | |
1313 | { | |
1314 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1315 | int area; | |
1316 | ||
e4e0bee9 GM |
1317 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1318 | return 0; | |
1319 | ||
5f5c8ee5 GM |
1320 | /* Compare glyphs. */ |
1321 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1322 | { | |
1323 | if (a->used[area] != b->used[area]) | |
1324 | return 0; | |
177c0ea7 | 1325 | |
5f5c8ee5 GM |
1326 | a_glyph = a->glyphs[area]; |
1327 | a_end = a_glyph + a->used[area]; | |
1328 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1329 | |
5f5c8ee5 GM |
1330 | while (a_glyph < a_end |
1331 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1332 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1333 | |
5f5c8ee5 GM |
1334 | if (a_glyph != a_end) |
1335 | return 0; | |
1336 | } | |
1337 | ||
6b61353c KH |
1338 | if (a->fill_line_p != b->fill_line_p |
1339 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1340 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
1341 | || a->left_fringe_face_id != b->left_fringe_face_id | |
1342 | || a->right_fringe_bitmap != b->right_fringe_bitmap | |
1343 | || a->right_fringe_face_id != b->right_fringe_face_id | |
3d4a365f | 1344 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
6b61353c | 1345 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1346 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1347 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1348 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
918f4159 | 1349 | || a->reversed_p != b->reversed_p |
5f5c8ee5 GM |
1350 | /* Different partially visible characters on left margin. */ |
1351 | || a->x != b->x | |
1352 | /* Different height. */ | |
1353 | || a->ascent != b->ascent | |
408f5064 GM |
1354 | || a->phys_ascent != b->phys_ascent |
1355 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1356 | || a->visible_height != b->visible_height) |
1357 | return 0; | |
1358 | } | |
1359 | ||
1360 | return 1; | |
1361 | } | |
1362 | ||
1363 | ||
1364 | \f | |
1365 | /*********************************************************************** | |
1366 | Glyph Pool | |
1367 | ||
1368 | See dispextern.h for an overall explanation of glyph pools. | |
1369 | ***********************************************************************/ | |
1370 | ||
1371 | /* Allocate a glyph_pool structure. The structure returned is | |
1372 | initialized with zeros. The global variable glyph_pool_count is | |
1373 | incremented for each pool allocated. */ | |
1374 | ||
1375 | static struct glyph_pool * | |
971de7fb | 1376 | new_glyph_pool (void) |
5f5c8ee5 GM |
1377 | { |
1378 | struct glyph_pool *result; | |
1379 | ||
1380 | /* Allocate a new glyph_pool and clear it. */ | |
1381 | result = (struct glyph_pool *) xmalloc (sizeof *result); | |
72af86bd | 1382 | memset (result, 0, sizeof *result); |
177c0ea7 | 1383 | |
5f5c8ee5 GM |
1384 | /* For memory leak and double deletion checking. */ |
1385 | ++glyph_pool_count; | |
177c0ea7 | 1386 | |
5f5c8ee5 GM |
1387 | return result; |
1388 | } | |
1389 | ||
1390 | ||
1391 | /* Free a glyph_pool structure POOL. The function may be called with | |
1392 | a null POOL pointer. The global variable glyph_pool_count is | |
1393 | decremented with every pool structure freed. If this count gets | |
1394 | negative, more structures were freed than allocated, i.e. one | |
1395 | structure must have been freed more than once or a bogus pointer | |
1396 | was passed to free_glyph_pool. */ | |
1397 | ||
1398 | static void | |
971de7fb | 1399 | free_glyph_pool (struct glyph_pool *pool) |
5f5c8ee5 GM |
1400 | { |
1401 | if (pool) | |
1402 | { | |
153a073c | 1403 | /* More freed than allocated? */ |
5f5c8ee5 GM |
1404 | --glyph_pool_count; |
1405 | xassert (glyph_pool_count >= 0); | |
1406 | ||
1407 | xfree (pool->glyphs); | |
1408 | xfree (pool); | |
1409 | } | |
1410 | } | |
1411 | ||
1412 | ||
1413 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1414 | columns we need. This function never shrinks a pool. The only | |
1415 | case in which this would make sense, would be when a frame's size | |
1416 | is changed from a large value to a smaller one. But, if someone | |
1417 | does it once, we can expect that he will do it again. | |
1418 | ||
1419 | Value is non-zero if the pool changed in a way which makes | |
1420 | re-adjusting window glyph matrices necessary. */ | |
1421 | ||
1422 | static int | |
971de7fb | 1423 | realloc_glyph_pool (struct glyph_pool *pool, struct dim matrix_dim) |
5f5c8ee5 GM |
1424 | { |
1425 | int needed; | |
1426 | int changed_p; | |
1427 | ||
1428 | changed_p = (pool->glyphs == 0 | |
1429 | || matrix_dim.height != pool->nrows | |
1430 | || matrix_dim.width != pool->ncolumns); | |
1431 | ||
1432 | /* Enlarge the glyph pool. */ | |
1433 | needed = matrix_dim.width * matrix_dim.height; | |
1434 | if (needed > pool->nglyphs) | |
1435 | { | |
1436 | int size = needed * sizeof (struct glyph); | |
1437 | ||
1438 | if (pool->glyphs) | |
cb4545ad EZ |
1439 | { |
1440 | pool->glyphs = (struct glyph *) xrealloc (pool->glyphs, size); | |
1441 | memset (pool->glyphs + pool->nglyphs, 0, | |
1442 | size - pool->nglyphs * sizeof (struct glyph)); | |
1443 | } | |
5f5c8ee5 GM |
1444 | else |
1445 | { | |
1446 | pool->glyphs = (struct glyph *) xmalloc (size); | |
72af86bd | 1447 | memset (pool->glyphs, 0, size); |
5f5c8ee5 GM |
1448 | } |
1449 | ||
1450 | pool->nglyphs = needed; | |
1451 | } | |
1452 | ||
153a073c | 1453 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1454 | to do sanity checks, and (b) the number of columns determines |
1455 | where rows in the frame matrix start---this must be available to | |
1456 | determine pointers to rows of window sub-matrices. */ | |
1457 | pool->nrows = matrix_dim.height; | |
1458 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1459 | |
5f5c8ee5 GM |
1460 | return changed_p; |
1461 | } | |
1462 | ||
1463 | ||
1464 | \f | |
1465 | /*********************************************************************** | |
1466 | Debug Code | |
1467 | ***********************************************************************/ | |
1468 | ||
1469 | #if GLYPH_DEBUG | |
1470 | ||
a13396c9 | 1471 | |
28d440ab KL |
1472 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1473 | XXX Maybe this should be changed to flush the current terminal instead of | |
1474 | stdout. | |
1475 | */ | |
a13396c9 GM |
1476 | |
1477 | void | |
59fc5cf9 | 1478 | flush_stdout (void) |
a13396c9 GM |
1479 | { |
1480 | fflush (stdout); | |
1481 | } | |
1482 | ||
1483 | ||
5f5c8ee5 GM |
1484 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1485 | pointer has been lost, e.g. by using a structure assignment between | |
1486 | rows, at least one pointer must occur more than once in the rows of | |
1487 | MATRIX. */ | |
1488 | ||
1489 | void | |
59fc5cf9 | 1490 | check_matrix_pointer_lossage (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
1491 | { |
1492 | int i, j; | |
177c0ea7 | 1493 | |
5f5c8ee5 GM |
1494 | for (i = 0; i < matrix->nrows; ++i) |
1495 | for (j = 0; j < matrix->nrows; ++j) | |
1496 | xassert (i == j | |
1497 | || (matrix->rows[i].glyphs[TEXT_AREA] | |
1498 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1499 | } | |
1500 | ||
1501 | ||
1502 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1503 | ||
1504 | struct glyph_row * | |
59fc5cf9 | 1505 | matrix_row (struct glyph_matrix *matrix, int row) |
5f5c8ee5 GM |
1506 | { |
1507 | xassert (matrix && matrix->rows); | |
1508 | xassert (row >= 0 && row < matrix->nrows); | |
1509 | ||
1510 | /* That's really too slow for normal testing because this function | |
1511 | is called almost everywhere. Although---it's still astonishingly | |
1512 | fast, so it is valuable to have for debugging purposes. */ | |
1513 | #if 0 | |
1514 | check_matrix_pointer_lossage (matrix); | |
1515 | #endif | |
177c0ea7 | 1516 | |
5f5c8ee5 GM |
1517 | return matrix->rows + row; |
1518 | } | |
1519 | ||
1520 | ||
1521 | #if 0 /* This function makes invalid assumptions when text is | |
1522 | partially invisible. But it might come handy for debugging | |
1523 | nevertheless. */ | |
1524 | ||
1525 | /* Check invariants that must hold for an up to date current matrix of | |
1526 | window W. */ | |
1527 | ||
1528 | static void | |
59fc5cf9 | 1529 | check_matrix_invariants (struct window *w) |
5f5c8ee5 GM |
1530 | { |
1531 | struct glyph_matrix *matrix = w->current_matrix; | |
1532 | int yb = window_text_bottom_y (w); | |
1533 | struct glyph_row *row = matrix->rows; | |
1534 | struct glyph_row *last_text_row = NULL; | |
1535 | struct buffer *saved = current_buffer; | |
1536 | struct buffer *buffer = XBUFFER (w->buffer); | |
1537 | int c; | |
177c0ea7 | 1538 | |
5f5c8ee5 GM |
1539 | /* This can sometimes happen for a fresh window. */ |
1540 | if (matrix->nrows < 2) | |
1541 | return; | |
1542 | ||
1543 | set_buffer_temp (buffer); | |
1544 | ||
1545 | /* Note: last row is always reserved for the mode line. */ | |
1546 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1547 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1548 | { | |
1549 | struct glyph_row *next = row + 1; | |
1550 | ||
1551 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1552 | last_text_row = row; | |
1553 | ||
1554 | /* Check that character and byte positions are in sync. */ | |
1555 | xassert (MATRIX_ROW_START_BYTEPOS (row) | |
1556 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); | |
d36fe237 EZ |
1557 | xassert (BYTEPOS (row->start.pos) |
1558 | == CHAR_TO_BYTE (CHARPOS (row->start.pos))); | |
5f5c8ee5 GM |
1559 | |
1560 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1561 | have such a position temporarily in case of a minibuffer | |
1562 | displaying something like `[Sole completion]' at its end. */ | |
1563 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
d36fe237 EZ |
1564 | { |
1565 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1566 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); | |
1567 | xassert (BYTEPOS (row->end.pos) | |
1568 | == CHAR_TO_BYTE (CHARPOS (row->end.pos))); | |
1569 | } | |
5f5c8ee5 GM |
1570 | |
1571 | /* Check that end position of `row' is equal to start position | |
1572 | of next row. */ | |
1573 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1574 | { | |
1575 | xassert (MATRIX_ROW_END_CHARPOS (row) | |
1576 | == MATRIX_ROW_START_CHARPOS (next)); | |
1577 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1578 | == MATRIX_ROW_START_BYTEPOS (next)); | |
d36fe237 EZ |
1579 | xassert (CHARPOS (row->end.pos) == CHARPOS (next->start.pos)); |
1580 | xassert (BYTEPOS (row->end.pos) == BYTEPOS (next->start.pos)); | |
5f5c8ee5 GM |
1581 | } |
1582 | row = next; | |
1583 | } | |
1584 | ||
1585 | xassert (w->current_matrix->nrows == w->desired_matrix->nrows); | |
1586 | xassert (w->desired_matrix->rows != NULL); | |
1587 | set_buffer_temp (saved); | |
1588 | } | |
1589 | ||
1590 | #endif /* 0 */ | |
1591 | ||
1592 | #endif /* GLYPH_DEBUG != 0 */ | |
1593 | ||
1594 | ||
1595 | \f | |
1596 | /********************************************************************** | |
1597 | Allocating/ Adjusting Glyph Matrices | |
1598 | **********************************************************************/ | |
1599 | ||
1600 | /* Allocate glyph matrices over a window tree for a frame-based | |
1601 | redisplay | |
1602 | ||
1603 | X and Y are column/row within the frame glyph matrix where | |
1604 | sub-matrices for the window tree rooted at WINDOW must be | |
8ce2650d YM |
1605 | allocated. DIM_ONLY_P non-zero means that the caller of this |
1606 | function is only interested in the result matrix dimension, and | |
1607 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1608 | |
1609 | The function returns the total width/height of the sub-matrices of | |
1610 | the window tree. If called on a frame root window, the computation | |
1611 | will take the mini-buffer window into account. | |
1612 | ||
1613 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1614 | ||
1615 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1616 | glyph matrices yet, and | |
1617 | ||
1618 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1619 | any window in the tree will be changed or have been changed (see | |
153a073c | 1620 | DIM_ONLY_P) |
5f5c8ee5 GM |
1621 | |
1622 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1623 | function. | |
1624 | ||
1625 | Windows are arranged into chains of windows on the same level | |
1626 | through the next fields of window structures. Such a level can be | |
1627 | either a sequence of horizontally adjacent windows from left to | |
1628 | right, or a sequence of vertically adjacent windows from top to | |
1629 | bottom. Each window in a horizontal sequence can be either a leaf | |
1630 | window or a vertical sequence; a window in a vertical sequence can | |
1631 | be either a leaf or a horizontal sequence. All windows in a | |
1632 | horizontal sequence have the same height, and all windows in a | |
1633 | vertical sequence have the same width. | |
1634 | ||
1635 | This function uses, for historical reasons, a more general | |
1636 | algorithm to determine glyph matrix dimensions that would be | |
1637 | necessary. | |
1638 | ||
1639 | The matrix height of a horizontal sequence is determined by the | |
1640 | maximum height of any matrix in the sequence. The matrix width of | |
1641 | a horizontal sequence is computed by adding up matrix widths of | |
1642 | windows in the sequence. | |
1643 | ||
1644 | |<------- result width ------->| | |
1645 | +---------+----------+---------+ --- | |
1646 | | | | | | | |
1647 | | | | | | |
1648 | +---------+ | | result height | |
1649 | | +---------+ | |
1650 | | | | | |
1651 | +----------+ --- | |
1652 | ||
1653 | The matrix width of a vertical sequence is the maximum matrix width | |
1654 | of any window in the sequence. Its height is computed by adding up | |
1655 | matrix heights of windows in the sequence. | |
1656 | ||
1657 | |<---- result width -->| | |
1658 | +---------+ --- | |
1659 | | | | | |
1660 | | | | | |
1661 | +---------+--+ | | |
1662 | | | | | |
1663 | | | result height | |
1664 | | | | |
1665 | +------------+---------+ | | |
1666 | | | | | |
1667 | | | | | |
1668 | +------------+---------+ --- */ | |
1669 | ||
1670 | /* Bit indicating that a new matrix will be allocated or has been | |
1671 | allocated. */ | |
1672 | ||
1673 | #define NEW_LEAF_MATRIX (1 << 0) | |
1674 | ||
1675 | /* Bit indicating that a matrix will or has changed its location or | |
1676 | size. */ | |
1677 | ||
1678 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1679 | ||
1680 | static struct dim | |
6f704c76 DN |
1681 | allocate_matrices_for_frame_redisplay (Lisp_Object window, int x, int y, |
1682 | int dim_only_p, int *window_change_flags) | |
5f5c8ee5 GM |
1683 | { |
1684 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1685 | int x0 = x, y0 = y; | |
1686 | int wmax = 0, hmax = 0; | |
1687 | struct dim total; | |
1688 | struct dim dim; | |
1689 | struct window *w; | |
1690 | int in_horz_combination_p; | |
1691 | ||
1692 | /* What combination is WINDOW part of? Compute this once since the | |
1693 | result is the same for all windows in the `next' chain. The | |
1694 | special case of a root window (parent equal to nil) is treated | |
1695 | like a vertical combination because a root window's `next' | |
1696 | points to the mini-buffer window, if any, which is arranged | |
1697 | vertically below other windows. */ | |
1698 | in_horz_combination_p | |
1699 | = (!NILP (XWINDOW (window)->parent) | |
1700 | && !NILP (XWINDOW (XWINDOW (window)->parent)->hchild)); | |
1701 | ||
1702 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1703 | do |
5f5c8ee5 GM |
1704 | { |
1705 | w = XWINDOW (window); | |
1706 | ||
1707 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1708 | on whether this is a combination or a leaf window. */ |
5f5c8ee5 | 1709 | if (!NILP (w->hchild)) |
177c0ea7 | 1710 | dim = allocate_matrices_for_frame_redisplay (w->hchild, x, y, |
5f5c8ee5 GM |
1711 | dim_only_p, |
1712 | window_change_flags); | |
1713 | else if (!NILP (w->vchild)) | |
177c0ea7 | 1714 | dim = allocate_matrices_for_frame_redisplay (w->vchild, x, y, |
5f5c8ee5 GM |
1715 | dim_only_p, |
1716 | window_change_flags); | |
1717 | else | |
1718 | { | |
1719 | /* If not already done, allocate sub-matrix structures. */ | |
1720 | if (w->desired_matrix == NULL) | |
1721 | { | |
1722 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1723 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1724 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1725 | } | |
177c0ea7 | 1726 | |
5f5c8ee5 GM |
1727 | /* Width and height MUST be chosen so that there are no |
1728 | holes in the frame matrix. */ | |
5d3cc43c GM |
1729 | dim.width = required_matrix_width (w); |
1730 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1731 | |
1732 | /* Will matrix be re-allocated? */ | |
1733 | if (x != w->desired_matrix->matrix_x | |
1734 | || y != w->desired_matrix->matrix_y | |
1735 | || dim.width != w->desired_matrix->matrix_w | |
1736 | || dim.height != w->desired_matrix->matrix_h | |
1737 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1738 | w->left_margin_cols) |
5f5c8ee5 GM |
1739 | != w->desired_matrix->left_margin_glyphs) |
1740 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1741 | w->right_margin_cols) |
5f5c8ee5 GM |
1742 | != w->desired_matrix->right_margin_glyphs)) |
1743 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1744 | ||
1745 | /* Actually change matrices, if allowed. Do not consider | |
1746 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1747 | may have been changed which we don't now here. We trust | |
1748 | that we only will be called with DIM_ONLY_P != 0 when | |
1749 | necessary. */ | |
1750 | if (!dim_only_p) | |
1751 | { | |
1752 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1753 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1754 | } | |
1755 | } | |
1756 | ||
1757 | /* If we are part of a horizontal combination, advance x for | |
1758 | windows to the right of W; otherwise advance y for windows | |
1759 | below W. */ | |
1760 | if (in_horz_combination_p) | |
1761 | x += dim.width; | |
177c0ea7 | 1762 | else |
5f5c8ee5 GM |
1763 | y += dim.height; |
1764 | ||
1765 | /* Remember maximum glyph matrix dimensions. */ | |
1766 | wmax = max (wmax, dim.width); | |
1767 | hmax = max (hmax, dim.height); | |
1768 | ||
1769 | /* Next window on same level. */ | |
1770 | window = w->next; | |
1771 | } | |
1772 | while (!NILP (window)); | |
1773 | ||
1774 | /* Set `total' to the total glyph matrix dimension of this window | |
1775 | level. In a vertical combination, the width is the width of the | |
1776 | widest window; the height is the y we finally reached, corrected | |
1777 | by the y we started with. In a horizontal combination, the total | |
1778 | height is the height of the tallest window, and the width is the | |
1779 | x we finally reached, corrected by the x we started with. */ | |
1780 | if (in_horz_combination_p) | |
1781 | { | |
1782 | total.width = x - x0; | |
1783 | total.height = hmax; | |
1784 | } | |
177c0ea7 | 1785 | else |
5f5c8ee5 GM |
1786 | { |
1787 | total.width = wmax; | |
1788 | total.height = y - y0; | |
1789 | } | |
1790 | ||
1791 | return total; | |
1792 | } | |
1793 | ||
1794 | ||
5d3cc43c GM |
1795 | /* Return the required height of glyph matrices for window W. */ |
1796 | ||
2f7c71a1 | 1797 | static int |
971de7fb | 1798 | required_matrix_height (struct window *w) |
5d3cc43c GM |
1799 | { |
1800 | #ifdef HAVE_WINDOW_SYSTEM | |
1801 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 1802 | |
5d3cc43c GM |
1803 | if (FRAME_WINDOW_P (f)) |
1804 | { | |
1805 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1ea40aa2 | 1806 | int window_pixel_height = window_box_height (w) + eabs (w->vscroll); |
5d3cc43c | 1807 | return (((window_pixel_height + ch_height - 1) |
cc834cf9 | 1808 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
1809 | /* One partially visible line at the top and |
1810 | bottom of the window. */ | |
1811 | + 2 | |
153a073c | 1812 | /* 2 for header and mode line. */ |
5d3cc43c GM |
1813 | + 2); |
1814 | } | |
1815 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 1816 | |
7df02016 | 1817 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
1818 | } |
1819 | ||
1820 | ||
1821 | /* Return the required width of glyph matrices for window W. */ | |
1822 | ||
2f7c71a1 | 1823 | static int |
971de7fb | 1824 | required_matrix_width (struct window *w) |
5d3cc43c GM |
1825 | { |
1826 | #ifdef HAVE_WINDOW_SYSTEM | |
1827 | struct frame *f = XFRAME (w->frame); | |
1828 | if (FRAME_WINDOW_P (f)) | |
1829 | { | |
1830 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 1831 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 1832 | |
5d3cc43c GM |
1833 | /* Compute number of glyphs needed in a glyph row. */ |
1834 | return (((window_pixel_width + ch_width - 1) | |
cc834cf9 | 1835 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
1836 | /* 2 partially visible columns in the text area. */ |
1837 | + 2 | |
1838 | /* One partially visible column at the right | |
1839 | edge of each marginal area. */ | |
1840 | + 1 + 1); | |
1841 | } | |
1842 | #endif /* HAVE_WINDOW_SYSTEM */ | |
1843 | ||
7df02016 | 1844 | return XINT (w->total_cols); |
5d3cc43c GM |
1845 | } |
1846 | ||
1847 | ||
5f5c8ee5 | 1848 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 1849 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 1850 | |
5f5c8ee5 | 1851 | static void |
971de7fb | 1852 | allocate_matrices_for_window_redisplay (struct window *w) |
5f5c8ee5 | 1853 | { |
5f5c8ee5 GM |
1854 | while (w) |
1855 | { | |
1856 | if (!NILP (w->vchild)) | |
5d3cc43c | 1857 | allocate_matrices_for_window_redisplay (XWINDOW (w->vchild)); |
5f5c8ee5 | 1858 | else if (!NILP (w->hchild)) |
5d3cc43c | 1859 | allocate_matrices_for_window_redisplay (XWINDOW (w->hchild)); |
5f5c8ee5 GM |
1860 | else |
1861 | { | |
1862 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
1863 | struct dim dim; |
1864 | ||
1865 | /* If matrices are not yet allocated, allocate them now. */ | |
1866 | if (w->desired_matrix == NULL) | |
1867 | { | |
1868 | w->desired_matrix = new_glyph_matrix (NULL); | |
1869 | w->current_matrix = new_glyph_matrix (NULL); | |
1870 | } | |
1871 | ||
5d3cc43c GM |
1872 | dim.width = required_matrix_width (w); |
1873 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1874 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
1875 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
1876 | } | |
177c0ea7 | 1877 | |
5f5c8ee5 GM |
1878 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
1879 | } | |
1880 | } | |
1881 | ||
1882 | ||
1883 | /* Re-allocate/ re-compute glyph matrices on frame F. If F is null, | |
1884 | do it for all frames; otherwise do it just for the given frame. | |
1885 | This function must be called when a new frame is created, its size | |
1886 | changes, or its window configuration changes. */ | |
1887 | ||
1888 | void | |
971de7fb | 1889 | adjust_glyphs (struct frame *f) |
5f5c8ee5 | 1890 | { |
408f5064 GM |
1891 | /* Block input so that expose events and other events that access |
1892 | glyph matrices are not processed while we are changing them. */ | |
1893 | BLOCK_INPUT; | |
1894 | ||
5f5c8ee5 GM |
1895 | if (f) |
1896 | adjust_frame_glyphs (f); | |
1897 | else | |
1898 | { | |
1899 | Lisp_Object tail, lisp_frame; | |
177c0ea7 | 1900 | |
5f5c8ee5 GM |
1901 | FOR_EACH_FRAME (tail, lisp_frame) |
1902 | adjust_frame_glyphs (XFRAME (lisp_frame)); | |
1903 | } | |
408f5064 GM |
1904 | |
1905 | UNBLOCK_INPUT; | |
5f5c8ee5 GM |
1906 | } |
1907 | ||
1908 | ||
1909 | /* Adjust frame glyphs when Emacs is initialized. | |
177c0ea7 JB |
1910 | |
1911 | To be called from init_display. | |
1912 | ||
5f5c8ee5 GM |
1913 | We need a glyph matrix because redraw will happen soon. |
1914 | Unfortunately, window sizes on selected_frame are not yet set to | |
1915 | meaningful values. I believe we can assume that there are only two | |
1916 | windows on the frame---the mini-buffer and the root window. Frame | |
1917 | height and width seem to be correct so far. So, set the sizes of | |
1918 | windows to estimated values. */ | |
1919 | ||
1920 | static void | |
971de7fb | 1921 | adjust_frame_glyphs_initially (void) |
5f5c8ee5 | 1922 | { |
91fb7e1b GM |
1923 | struct frame *sf = SELECTED_FRAME (); |
1924 | struct window *root = XWINDOW (sf->root_window); | |
5f5c8ee5 | 1925 | struct window *mini = XWINDOW (root->next); |
7df02016 KS |
1926 | int frame_lines = FRAME_LINES (sf); |
1927 | int frame_cols = FRAME_COLS (sf); | |
91fb7e1b | 1928 | int top_margin = FRAME_TOP_MARGIN (sf); |
5f5c8ee5 GM |
1929 | |
1930 | /* Do it for the root window. */ | |
7df02016 KS |
1931 | XSETFASTINT (root->top_line, top_margin); |
1932 | XSETFASTINT (root->total_cols, frame_cols); | |
1933 | set_window_height (sf->root_window, frame_lines - 1 - top_margin, 0); | |
5f5c8ee5 GM |
1934 | |
1935 | /* Do it for the mini-buffer window. */ | |
7df02016 KS |
1936 | XSETFASTINT (mini->top_line, frame_lines - 1); |
1937 | XSETFASTINT (mini->total_cols, frame_cols); | |
5f5c8ee5 GM |
1938 | set_window_height (root->next, 1, 0); |
1939 | ||
91fb7e1b | 1940 | adjust_frame_glyphs (sf); |
5f5c8ee5 GM |
1941 | glyphs_initialized_initially_p = 1; |
1942 | } | |
177c0ea7 | 1943 | |
5f5c8ee5 GM |
1944 | |
1945 | /* Allocate/reallocate glyph matrices of a single frame F. */ | |
1946 | ||
1947 | static void | |
971de7fb | 1948 | adjust_frame_glyphs (struct frame *f) |
5f5c8ee5 GM |
1949 | { |
1950 | if (FRAME_WINDOW_P (f)) | |
1951 | adjust_frame_glyphs_for_window_redisplay (f); | |
1952 | else | |
1953 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 1954 | |
5f5c8ee5 GM |
1955 | /* Don't forget the message buffer and the buffer for |
1956 | decode_mode_spec. */ | |
1957 | adjust_frame_message_buffer (f); | |
1958 | adjust_decode_mode_spec_buffer (f); | |
1959 | ||
1960 | f->glyphs_initialized_p = 1; | |
1961 | } | |
1962 | ||
075757cc CY |
1963 | /* Return 1 if any window in the tree has nonzero window margins. See |
1964 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ | |
1965 | static int | |
971de7fb | 1966 | showing_window_margins_p (struct window *w) |
075757cc CY |
1967 | { |
1968 | while (w) | |
1969 | { | |
1970 | if (!NILP (w->hchild)) | |
1971 | { | |
1972 | if (showing_window_margins_p (XWINDOW (w->hchild))) | |
1973 | return 1; | |
1974 | } | |
1975 | else if (!NILP (w->vchild)) | |
1976 | { | |
1977 | if (showing_window_margins_p (XWINDOW (w->vchild))) | |
1978 | return 1; | |
1979 | } | |
1980 | else if (!NILP (w->left_margin_cols) | |
1981 | || !NILP (w->right_margin_cols)) | |
1982 | return 1; | |
3fc809e2 | 1983 | |
075757cc CY |
1984 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
1985 | } | |
1986 | return 0; | |
1987 | } | |
1988 | ||
5f5c8ee5 | 1989 | |
c9f00270 GM |
1990 | /* In the window tree with root W, build current matrices of leaf |
1991 | windows from the frame's current matrix. */ | |
1992 | ||
1993 | static void | |
971de7fb | 1994 | fake_current_matrices (Lisp_Object window) |
c9f00270 GM |
1995 | { |
1996 | struct window *w; | |
177c0ea7 | 1997 | |
c9f00270 GM |
1998 | for (; !NILP (window); window = w->next) |
1999 | { | |
2000 | w = XWINDOW (window); | |
177c0ea7 | 2001 | |
c9f00270 GM |
2002 | if (!NILP (w->hchild)) |
2003 | fake_current_matrices (w->hchild); | |
2004 | else if (!NILP (w->vchild)) | |
2005 | fake_current_matrices (w->vchild); | |
2006 | else | |
2007 | { | |
2008 | int i; | |
2009 | struct frame *f = XFRAME (w->frame); | |
2010 | struct glyph_matrix *m = w->current_matrix; | |
2011 | struct glyph_matrix *fm = f->current_matrix; | |
2012 | ||
7df02016 KS |
2013 | xassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
2014 | xassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 2015 | |
c9f00270 GM |
2016 | for (i = 0; i < m->matrix_h; ++i) |
2017 | { | |
2018 | struct glyph_row *r = m->rows + i; | |
7df02016 | 2019 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 GM |
2020 | |
2021 | xassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] | |
2022 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); | |
2023 | ||
2024 | r->enabled_p = fr->enabled_p; | |
2025 | if (r->enabled_p) | |
2026 | { | |
2027 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
2028 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
2029 | r->used[TEXT_AREA] = (m->matrix_w | |
2030 | - r->used[LEFT_MARGIN_AREA] | |
2031 | - r->used[RIGHT_MARGIN_AREA]); | |
2032 | r->mode_line_p = 0; | |
c9f00270 GM |
2033 | } |
2034 | } | |
2035 | } | |
2036 | } | |
2037 | } | |
2038 | ||
2039 | ||
bccee4f2 | 2040 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 2041 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 2042 | |
bccee4f2 | 2043 | static struct glyph_matrix * |
971de7fb | 2044 | save_current_matrix (struct frame *f) |
c9f00270 | 2045 | { |
bccee4f2 GM |
2046 | int i; |
2047 | struct glyph_matrix *saved; | |
e797dea6 | 2048 | |
bccee4f2 | 2049 | saved = (struct glyph_matrix *) xmalloc (sizeof *saved); |
72af86bd | 2050 | memset (saved, 0, sizeof *saved); |
bccee4f2 GM |
2051 | saved->nrows = f->current_matrix->nrows; |
2052 | saved->rows = (struct glyph_row *) xmalloc (saved->nrows | |
2053 | * sizeof *saved->rows); | |
72af86bd | 2054 | memset (saved->rows, 0, saved->nrows * sizeof *saved->rows); |
bccee4f2 GM |
2055 | |
2056 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 2057 | { |
bccee4f2 GM |
2058 | struct glyph_row *from = f->current_matrix->rows + i; |
2059 | struct glyph_row *to = saved->rows + i; | |
2060 | size_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); | |
2061 | to->glyphs[TEXT_AREA] = (struct glyph *) xmalloc (nbytes); | |
72af86bd | 2062 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
bccee4f2 | 2063 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
e797dea6 | 2064 | } |
bccee4f2 GM |
2065 | |
2066 | return saved; | |
2067 | } | |
2068 | ||
2069 | ||
2070 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
2071 | and free memory associated with SAVED. */ | |
2072 | ||
2073 | static void | |
971de7fb | 2074 | restore_current_matrix (struct frame *f, struct glyph_matrix *saved) |
bccee4f2 GM |
2075 | { |
2076 | int i; | |
2077 | ||
2078 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 2079 | { |
bccee4f2 GM |
2080 | struct glyph_row *from = saved->rows + i; |
2081 | struct glyph_row *to = f->current_matrix->rows + i; | |
e797dea6 | 2082 | size_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
72af86bd | 2083 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
e797dea6 | 2084 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
bccee4f2 | 2085 | xfree (from->glyphs[TEXT_AREA]); |
e797dea6 | 2086 | } |
177c0ea7 | 2087 | |
bccee4f2 GM |
2088 | xfree (saved->rows); |
2089 | xfree (saved); | |
c9f00270 GM |
2090 | } |
2091 | ||
2092 | ||
bccee4f2 | 2093 | |
5f5c8ee5 GM |
2094 | /* Allocate/reallocate glyph matrices of a single frame F for |
2095 | frame-based redisplay. */ | |
2096 | ||
2097 | static void | |
971de7fb | 2098 | adjust_frame_glyphs_for_frame_redisplay (struct frame *f) |
5f5c8ee5 | 2099 | { |
5f5c8ee5 GM |
2100 | struct dim matrix_dim; |
2101 | int pool_changed_p; | |
2102 | int window_change_flags; | |
2103 | int top_window_y; | |
2104 | ||
2105 | if (!FRAME_LIVE_P (f)) | |
2106 | return; | |
2107 | ||
5f5c8ee5 GM |
2108 | top_window_y = FRAME_TOP_MARGIN (f); |
2109 | ||
2110 | /* Allocate glyph pool structures if not already done. */ | |
2111 | if (f->desired_pool == NULL) | |
2112 | { | |
2113 | f->desired_pool = new_glyph_pool (); | |
2114 | f->current_pool = new_glyph_pool (); | |
2115 | } | |
2116 | ||
2117 | /* Allocate frames matrix structures if needed. */ | |
2118 | if (f->desired_matrix == NULL) | |
2119 | { | |
2120 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
2121 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
2122 | } | |
177c0ea7 | 2123 | |
5f5c8ee5 GM |
2124 | /* Compute window glyph matrices. (This takes the mini-buffer |
2125 | window into account). The result is the size of the frame glyph | |
2126 | matrix needed. The variable window_change_flags is set to a bit | |
2127 | mask indicating whether new matrices will be allocated or | |
2128 | existing matrices change their size or location within the frame | |
2129 | matrix. */ | |
2130 | window_change_flags = 0; | |
2131 | matrix_dim | |
2132 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
2133 | 0, top_window_y, | |
5d3cc43c | 2134 | 1, |
5f5c8ee5 GM |
2135 | &window_change_flags); |
2136 | ||
2137 | /* Add in menu bar lines, if any. */ | |
2138 | matrix_dim.height += top_window_y; | |
2139 | ||
2140 | /* Enlarge pools as necessary. */ | |
2141 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
2142 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
2143 | ||
177c0ea7 | 2144 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
2145 | absolutely necessary since it requires a frame redraw. */ |
2146 | if (pool_changed_p || window_change_flags) | |
2147 | { | |
2148 | /* Do it for window matrices. */ | |
2149 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 2150 | 0, top_window_y, 0, |
5f5c8ee5 GM |
2151 | &window_change_flags); |
2152 | ||
2153 | /* Size of frame matrices must equal size of frame. Note | |
2154 | that we are called for X frames with window widths NOT equal | |
2155 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
7df02016 KS |
2156 | xassert (matrix_dim.width == FRAME_COLS (f) |
2157 | && matrix_dim.height == FRAME_LINES (f)); | |
177c0ea7 | 2158 | |
e797dea6 GM |
2159 | /* Pointers to glyph memory in glyph rows are exchanged during |
2160 | the update phase of redisplay, which means in general that a | |
2161 | frame's current matrix consists of pointers into both the | |
2162 | desired and current glyph pool of the frame. Adjusting a | |
2163 | matrix sets the frame matrix up so that pointers are all into | |
2164 | the same pool. If we want to preserve glyph contents of the | |
2165 | current matrix over a call to adjust_glyph_matrix, we must | |
2166 | make a copy of the current glyphs, and restore the current | |
2167 | matrix' contents from that copy. */ | |
2168 | if (display_completed | |
2169 | && !FRAME_GARBAGED_P (f) | |
2170 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
2171 | && matrix_dim.height == f->current_matrix->matrix_h |
2172 | /* For some reason, the frame glyph matrix gets corrupted if | |
2173 | any of the windows contain margins. I haven't been able | |
2174 | to hunt down the reason, but for the moment this prevents | |
2175 | the problem from manifesting. -- cyd */ | |
2176 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) | |
e797dea6 | 2177 | { |
bccee4f2 GM |
2178 | struct glyph_matrix *copy = save_current_matrix (f); |
2179 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2180 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2181 | restore_current_matrix (f, copy); |
e797dea6 GM |
2182 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2183 | } | |
c9f00270 | 2184 | else |
e797dea6 | 2185 | { |
bccee4f2 | 2186 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2187 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2188 | SET_FRAME_GARBAGED (f); | |
2189 | } | |
5f5c8ee5 GM |
2190 | } |
2191 | } | |
2192 | ||
2193 | ||
2194 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2195 | window-based redisplay. */ | |
2196 | ||
2197 | static void | |
971de7fb | 2198 | adjust_frame_glyphs_for_window_redisplay (struct frame *f) |
5f5c8ee5 | 2199 | { |
5f5c8ee5 | 2200 | xassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); |
177c0ea7 | 2201 | |
5f5c8ee5 | 2202 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2203 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2204 | |
8ce2650d | 2205 | #ifdef HAVE_X_WINDOWS |
5f5c8ee5 GM |
2206 | /* Allocate/ reallocate matrices of the dummy window used to display |
2207 | the menu bar under X when no X toolkit support is available. */ | |
488dd4c4 | 2208 | #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2209 | { |
2210 | /* Allocate a dummy window if not already done. */ | |
d2d37ddc | 2211 | struct window *w; |
5f5c8ee5 GM |
2212 | if (NILP (f->menu_bar_window)) |
2213 | { | |
2214 | f->menu_bar_window = make_window (); | |
2215 | w = XWINDOW (f->menu_bar_window); | |
2216 | XSETFRAME (w->frame, f); | |
2217 | w->pseudo_window_p = 1; | |
2218 | } | |
2219 | else | |
2220 | w = XWINDOW (f->menu_bar_window); | |
2221 | ||
2222 | /* Set window dimensions to frame dimensions and allocate or | |
2223 | adjust glyph matrices of W. */ | |
7df02016 KS |
2224 | XSETFASTINT (w->top_line, 0); |
2225 | XSETFASTINT (w->left_col, 0); | |
2226 | XSETFASTINT (w->total_lines, FRAME_MENU_BAR_LINES (f)); | |
2227 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
5d3cc43c | 2228 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2229 | } |
57714a86 YM |
2230 | #endif /* not USE_X_TOOLKIT && not USE_GTK */ |
2231 | #endif /* HAVE_X_WINDOWS */ | |
5f5c8ee5 | 2232 | |
488dd4c4 | 2233 | #ifndef USE_GTK |
d2d37ddc PE |
2234 | { |
2235 | /* Allocate/ reallocate matrices of the tool bar window. If we | |
2236 | don't have a tool bar window yet, make one. */ | |
2237 | struct window *w; | |
2238 | if (NILP (f->tool_bar_window)) | |
2239 | { | |
2240 | f->tool_bar_window = make_window (); | |
2241 | w = XWINDOW (f->tool_bar_window); | |
2242 | XSETFRAME (w->frame, f); | |
2243 | w->pseudo_window_p = 1; | |
2244 | } | |
2245 | else | |
9ea173e8 | 2246 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2247 | |
d2d37ddc PE |
2248 | XSETFASTINT (w->top_line, FRAME_MENU_BAR_LINES (f)); |
2249 | XSETFASTINT (w->left_col, 0); | |
2250 | XSETFASTINT (w->total_lines, FRAME_TOOL_BAR_LINES (f)); | |
2251 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
2252 | allocate_matrices_for_window_redisplay (w); | |
2253 | } | |
488dd4c4 | 2254 | #endif |
5f5c8ee5 GM |
2255 | } |
2256 | ||
2257 | ||
177c0ea7 | 2258 | /* Adjust/ allocate message buffer of frame F. |
5f5c8ee5 | 2259 | |
5f5c8ee5 GM |
2260 | Note that the message buffer is never freed. Since I could not |
2261 | find a free in 19.34, I assume that freeing it would be | |
2262 | problematic in some way and don't do it either. | |
2263 | ||
2264 | (Implementation note: It should be checked if we can free it | |
2265 | eventually without causing trouble). */ | |
2266 | ||
2267 | static void | |
971de7fb | 2268 | adjust_frame_message_buffer (struct frame *f) |
5f5c8ee5 GM |
2269 | { |
2270 | int size = FRAME_MESSAGE_BUF_SIZE (f) + 1; | |
2271 | ||
2272 | if (FRAME_MESSAGE_BUF (f)) | |
2273 | { | |
2274 | char *buffer = FRAME_MESSAGE_BUF (f); | |
2275 | char *new_buffer = (char *) xrealloc (buffer, size); | |
5f5c8ee5 GM |
2276 | FRAME_MESSAGE_BUF (f) = new_buffer; |
2277 | } | |
2278 | else | |
2279 | FRAME_MESSAGE_BUF (f) = (char *) xmalloc (size); | |
2280 | } | |
2281 | ||
2282 | ||
2283 | /* Re-allocate buffer for decode_mode_spec on frame F. */ | |
2284 | ||
2285 | static void | |
971de7fb | 2286 | adjust_decode_mode_spec_buffer (struct frame *f) |
5f5c8ee5 GM |
2287 | { |
2288 | f->decode_mode_spec_buffer | |
2289 | = (char *) xrealloc (f->decode_mode_spec_buffer, | |
2290 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
2291 | } | |
2292 | ||
2293 | ||
2294 | \f | |
2295 | /********************************************************************** | |
2296 | Freeing Glyph Matrices | |
2297 | **********************************************************************/ | |
2298 | ||
2299 | /* Free glyph memory for a frame F. F may be null. This function can | |
2300 | be called for the same frame more than once. The root window of | |
2301 | F may be nil when this function is called. This is the case when | |
2302 | the function is called when F is destroyed. */ | |
2303 | ||
2304 | void | |
971de7fb | 2305 | free_glyphs (struct frame *f) |
5f5c8ee5 GM |
2306 | { |
2307 | if (f && f->glyphs_initialized_p) | |
2308 | { | |
42f55fe0 GM |
2309 | /* Block interrupt input so that we don't get surprised by an X |
2310 | event while we're in an inconsistent state. */ | |
2311 | BLOCK_INPUT; | |
5f5c8ee5 | 2312 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2313 | |
5f5c8ee5 GM |
2314 | /* Release window sub-matrices. */ |
2315 | if (!NILP (f->root_window)) | |
2316 | free_window_matrices (XWINDOW (f->root_window)); | |
2317 | ||
2318 | /* Free the dummy window for menu bars without X toolkit and its | |
2319 | glyph matrices. */ | |
2320 | if (!NILP (f->menu_bar_window)) | |
2321 | { | |
2322 | struct window *w = XWINDOW (f->menu_bar_window); | |
2323 | free_glyph_matrix (w->desired_matrix); | |
2324 | free_glyph_matrix (w->current_matrix); | |
2325 | w->desired_matrix = w->current_matrix = NULL; | |
2326 | f->menu_bar_window = Qnil; | |
2327 | } | |
2328 | ||
9ea173e8 GM |
2329 | /* Free the tool bar window and its glyph matrices. */ |
2330 | if (!NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2331 | { |
9ea173e8 | 2332 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2333 | free_glyph_matrix (w->desired_matrix); |
2334 | free_glyph_matrix (w->current_matrix); | |
2335 | w->desired_matrix = w->current_matrix = NULL; | |
9ea173e8 | 2336 | f->tool_bar_window = Qnil; |
5f5c8ee5 GM |
2337 | } |
2338 | ||
2339 | /* Release frame glyph matrices. Reset fields to zero in | |
2340 | case we are called a second time. */ | |
2341 | if (f->desired_matrix) | |
2342 | { | |
2343 | free_glyph_matrix (f->desired_matrix); | |
2344 | free_glyph_matrix (f->current_matrix); | |
2345 | f->desired_matrix = f->current_matrix = NULL; | |
2346 | } | |
2347 | ||
2348 | /* Release glyph pools. */ | |
2349 | if (f->desired_pool) | |
2350 | { | |
2351 | free_glyph_pool (f->desired_pool); | |
2352 | free_glyph_pool (f->current_pool); | |
2353 | f->desired_pool = f->current_pool = NULL; | |
2354 | } | |
177c0ea7 | 2355 | |
42f55fe0 | 2356 | UNBLOCK_INPUT; |
5f5c8ee5 GM |
2357 | } |
2358 | } | |
2359 | ||
2360 | ||
2361 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2362 | function may be called with a null pointer, and it may be called on | |
2363 | the same tree more than once. */ | |
2364 | ||
2365 | void | |
971de7fb | 2366 | free_window_matrices (struct window *w) |
5f5c8ee5 GM |
2367 | { |
2368 | while (w) | |
2369 | { | |
2370 | if (!NILP (w->hchild)) | |
2371 | free_window_matrices (XWINDOW (w->hchild)); | |
2372 | else if (!NILP (w->vchild)) | |
2373 | free_window_matrices (XWINDOW (w->vchild)); | |
177c0ea7 | 2374 | else |
5f5c8ee5 GM |
2375 | { |
2376 | /* This is a leaf window. Free its memory and reset fields | |
2377 | to zero in case this function is called a second time for | |
2378 | W. */ | |
2379 | free_glyph_matrix (w->current_matrix); | |
2380 | free_glyph_matrix (w->desired_matrix); | |
2381 | w->current_matrix = w->desired_matrix = NULL; | |
2382 | } | |
2383 | ||
2384 | /* Next window on same level. */ | |
2385 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2386 | } | |
2387 | } | |
2388 | ||
2389 | ||
2390 | /* Check glyph memory leaks. This function is called from | |
2391 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2392 | exits. We therefore free all glyph memory for all active frames | |
2393 | explicitly and check that nothing is left allocated. */ | |
2394 | ||
2395 | void | |
971de7fb | 2396 | check_glyph_memory (void) |
5f5c8ee5 GM |
2397 | { |
2398 | Lisp_Object tail, frame; | |
2399 | ||
2400 | /* Free glyph memory for all frames. */ | |
2401 | FOR_EACH_FRAME (tail, frame) | |
2402 | free_glyphs (XFRAME (frame)); | |
2403 | ||
2404 | /* Check that nothing is left allocated. */ | |
2405 | if (glyph_matrix_count) | |
2406 | abort (); | |
2407 | if (glyph_pool_count) | |
2408 | abort (); | |
2409 | } | |
2410 | ||
2411 | ||
2412 | \f | |
2413 | /********************************************************************** | |
2414 | Building a Frame Matrix | |
2415 | **********************************************************************/ | |
2416 | ||
2417 | /* Most of the redisplay code works on glyph matrices attached to | |
2418 | windows. This is a good solution most of the time, but it is not | |
2419 | suitable for terminal code. Terminal output functions cannot rely | |
2420 | on being able to set an arbitrary terminal window. Instead they | |
2421 | must be provided with a view of the whole frame, i.e. the whole | |
2422 | screen. We build such a view by constructing a frame matrix from | |
2423 | window matrices in this section. | |
2424 | ||
2425 | Windows that must be updated have their must_be_update_p flag set. | |
2426 | For all such windows, their desired matrix is made part of the | |
2427 | desired frame matrix. For other windows, their current matrix is | |
2428 | made part of the desired frame matrix. | |
2429 | ||
2430 | +-----------------+----------------+ | |
2431 | | desired | desired | | |
2432 | | | | | |
2433 | +-----------------+----------------+ | |
2434 | | current | | |
2435 | | | | |
2436 | +----------------------------------+ | |
2437 | ||
2438 | Desired window matrices can be made part of the frame matrix in a | |
2439 | cheap way: We exploit the fact that the desired frame matrix and | |
2440 | desired window matrices share their glyph memory. This is not | |
2441 | possible for current window matrices. Their glyphs are copied to | |
2442 | the desired frame matrix. The latter is equivalent to | |
2443 | preserve_other_columns in the old redisplay. | |
2444 | ||
2445 | Used glyphs counters for frame matrix rows are the result of adding | |
2446 | up glyph lengths of the window matrices. A line in the frame | |
2447 | matrix is enabled, if a corresponding line in a window matrix is | |
2448 | enabled. | |
177c0ea7 | 2449 | |
5f5c8ee5 GM |
2450 | After building the desired frame matrix, it will be passed to |
2451 | terminal code, which will manipulate both the desired and current | |
2452 | frame matrix. Changes applied to the frame's current matrix have | |
2453 | to be visible in current window matrices afterwards, of course. | |
2454 | ||
2455 | This problem is solved like this: | |
2456 | ||
2457 | 1. Window and frame matrices share glyphs. Window matrices are | |
2458 | constructed in a way that their glyph contents ARE the glyph | |
2459 | contents needed in a frame matrix. Thus, any modification of | |
2460 | glyphs done in terminal code will be reflected in window matrices | |
2461 | automatically. | |
177c0ea7 | 2462 | |
5f5c8ee5 GM |
2463 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2464 | intercepted by hook functions so that corresponding row operations | |
2465 | on window matrices can be performed. This is necessary because we | |
2466 | use pointers to glyphs in glyph row structures. To satisfy the | |
2467 | assumption of point 1 above that glyphs are updated implicitly in | |
2468 | window matrices when they are manipulated via the frame matrix, | |
2469 | window and frame matrix must of course agree where to find the | |
2470 | glyphs for their rows. Possible manipulations that must be | |
2471 | mirrored are assignments of rows of the desired frame matrix to the | |
2472 | current frame matrix and scrolling the current frame matrix. */ | |
2473 | ||
2474 | /* Build frame F's desired matrix from window matrices. Only windows | |
2475 | which have the flag must_be_updated_p set have to be updated. Menu | |
2476 | bar lines of a frame are not covered by window matrices, so make | |
2477 | sure not to touch them in this function. */ | |
2478 | ||
2479 | static void | |
971de7fb | 2480 | build_frame_matrix (struct frame *f) |
5f5c8ee5 GM |
2481 | { |
2482 | int i; | |
2483 | ||
2484 | /* F must have a frame matrix when this function is called. */ | |
2485 | xassert (!FRAME_WINDOW_P (f)); | |
177c0ea7 | 2486 | |
5f5c8ee5 GM |
2487 | /* Clear all rows in the frame matrix covered by window matrices. |
2488 | Menu bar lines are not covered by windows. */ | |
2489 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2490 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2491 | ||
2492 | /* Build the matrix by walking the window tree. */ | |
2493 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2494 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2495 | } | |
2496 | ||
2497 | ||
2498 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2499 | matrices. W is the root of a window tree. */ | |
2500 | ||
2501 | static void | |
971de7fb | 2502 | build_frame_matrix_from_window_tree (struct glyph_matrix *matrix, struct window *w) |
5f5c8ee5 GM |
2503 | { |
2504 | while (w) | |
2505 | { | |
2506 | if (!NILP (w->hchild)) | |
2507 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->hchild)); | |
2508 | else if (!NILP (w->vchild)) | |
2509 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->vchild)); | |
2510 | else | |
2511 | build_frame_matrix_from_leaf_window (matrix, w); | |
2512 | ||
2513 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2514 | } | |
2515 | } | |
2516 | ||
2517 | ||
2518 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2519 | desired frame matrix built. W is a leaf window whose desired or | |
2520 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2521 | must_be_updated_p determines which matrix it contributes to | |
2522 | FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix | |
2523 | is added to FRAME_MATRIX, otherwise W's current matrix is added. | |
2524 | Adding a desired matrix means setting up used counters and such in | |
2525 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2526 | means copying glyphs. The latter case corresponds to | |
2527 | preserve_other_columns in the old redisplay. */ | |
2528 | ||
2529 | static void | |
971de7fb | 2530 | build_frame_matrix_from_leaf_window (struct glyph_matrix *frame_matrix, struct window *w) |
5f5c8ee5 GM |
2531 | { |
2532 | struct glyph_matrix *window_matrix; | |
2533 | int window_y, frame_y; | |
2534 | /* If non-zero, a glyph to insert at the right border of W. */ | |
3fc809e2 KS |
2535 | GLYPH right_border_glyph; |
2536 | ||
2537 | SET_GLYPH_FROM_CHAR (right_border_glyph, 0); | |
5f5c8ee5 GM |
2538 | |
2539 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2540 | if (w->must_be_updated_p) | |
2541 | { | |
2542 | window_matrix = w->desired_matrix; | |
2543 | ||
2544 | /* Decide whether we want to add a vertical border glyph. */ | |
2545 | if (!WINDOW_RIGHTMOST_P (w)) | |
2546 | { | |
2547 | struct Lisp_Char_Table *dp = window_display_table (w); | |
3fc809e2 | 2548 | Lisp_Object gc; |
b4e49aee | 2549 | |
3fc809e2 KS |
2550 | SET_GLYPH_FROM_CHAR (right_border_glyph, '|'); |
2551 | if (dp | |
2552 | && (gc = DISP_BORDER_GLYPH (dp), GLYPH_CODE_P (gc)) | |
2553 | && GLYPH_CODE_CHAR_VALID_P (gc)) | |
2554 | { | |
2555 | SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph, gc); | |
2556 | spec_glyph_lookup_face (w, &right_border_glyph); | |
2557 | } | |
b4e49aee | 2558 | |
3fc809e2 KS |
2559 | if (GLYPH_FACE (right_border_glyph) <= 0) |
2560 | SET_GLYPH_FACE (right_border_glyph, VERTICAL_BORDER_FACE_ID); | |
5f5c8ee5 GM |
2561 | } |
2562 | } | |
2563 | else | |
2564 | window_matrix = w->current_matrix; | |
2565 | ||
2566 | /* For all rows in the window matrix and corresponding rows in the | |
2567 | frame matrix. */ | |
2568 | window_y = 0; | |
2569 | frame_y = window_matrix->matrix_y; | |
2570 | while (window_y < window_matrix->nrows) | |
2571 | { | |
2572 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2573 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
2a8bd25f | 2574 | int current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2575 | |
2576 | /* Fill up the frame row with spaces up to the left margin of the | |
2577 | window row. */ | |
2578 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2579 | ||
2580 | /* Fill up areas in the window matrix row with spaces. */ | |
2581 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2582 | |
2583 | /* If only part of W's desired matrix has been built, and | |
2584 | window_row wasn't displayed, use the corresponding current | |
2585 | row instead. */ | |
2586 | if (window_matrix == w->desired_matrix | |
2587 | && !window_row->enabled_p) | |
2588 | { | |
2589 | window_row = w->current_matrix->rows + window_y; | |
2590 | current_row_p = 1; | |
2591 | } | |
177c0ea7 | 2592 | |
2a8bd25f | 2593 | if (current_row_p) |
5f5c8ee5 | 2594 | { |
2a8bd25f | 2595 | /* Copy window row to frame row. */ |
72af86bd AS |
2596 | memcpy (frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, |
2597 | window_row->glyphs[0], | |
2598 | window_matrix->matrix_w * sizeof (struct glyph)); | |
5f5c8ee5 GM |
2599 | } |
2600 | else | |
2601 | { | |
2a8bd25f | 2602 | xassert (window_row->enabled_p); |
177c0ea7 | 2603 | |
2a8bd25f GM |
2604 | /* Only when a desired row has been displayed, we want |
2605 | the corresponding frame row to be updated. */ | |
2606 | frame_row->enabled_p = 1; | |
177c0ea7 | 2607 | |
5f5c8ee5 GM |
2608 | /* Maybe insert a vertical border between horizontally adjacent |
2609 | windows. */ | |
3fc809e2 | 2610 | if (GLYPH_CHAR (right_border_glyph) != 0) |
5f5c8ee5 GM |
2611 | { |
2612 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2613 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2614 | } | |
2615 | ||
498c08ea | 2616 | #if GLYPH_DEBUG |
a13396c9 GM |
2617 | /* Window row window_y must be a slice of frame row |
2618 | frame_y. */ | |
5f5c8ee5 | 2619 | xassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2620 | |
5f5c8ee5 GM |
2621 | /* If rows are in sync, we don't have to copy glyphs because |
2622 | frame and window share glyphs. */ | |
177c0ea7 | 2623 | |
a38634ff | 2624 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2625 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2626 | #endif |
5f5c8ee5 GM |
2627 | } |
2628 | ||
2629 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2630 | up with spaces, and visit leaf windows from left to right it | |
2631 | can be done simply. */ | |
177c0ea7 | 2632 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2633 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2634 | ||
5f5c8ee5 GM |
2635 | /* Next row. */ |
2636 | ++window_y; | |
2637 | ++frame_y; | |
2638 | } | |
2639 | } | |
2640 | ||
5f81871e RS |
2641 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2642 | ID, return a glyph that has a realized face ID. | |
2643 | This is used for glyphs displayed specially and not part of the text; | |
2644 | for instance, vertical separators, truncation markers, etc. */ | |
2645 | ||
3fc809e2 | 2646 | void |
971de7fb | 2647 | spec_glyph_lookup_face (struct window *w, GLYPH *glyph) |
5f81871e | 2648 | { |
3fc809e2 | 2649 | int lface_id = GLYPH_FACE (*glyph); |
5f81871e RS |
2650 | /* Convert the glyph's specified face to a realized (cache) face. */ |
2651 | if (lface_id > 0) | |
2652 | { | |
2653 | int face_id = merge_faces (XFRAME (w->frame), | |
2654 | Qt, lface_id, DEFAULT_FACE_ID); | |
3fc809e2 | 2655 | SET_GLYPH_FACE (*glyph, face_id); |
5f81871e | 2656 | } |
5f81871e | 2657 | } |
5f5c8ee5 GM |
2658 | |
2659 | /* Add spaces to a glyph row ROW in a window matrix. | |
2660 | ||
2661 | Each row has the form: | |
2662 | ||
2663 | +---------+-----------------------------+------------+ | |
2664 | | left | text | right | | |
2665 | +---------+-----------------------------+------------+ | |
2666 | ||
2667 | Left and right marginal areas are optional. This function adds | |
2668 | spaces to areas so that there are no empty holes between areas. | |
2669 | In other words: If the right area is not empty, the text area | |
2670 | is filled up with spaces up to the right area. If the text area | |
2671 | is not empty, the left area is filled up. | |
2672 | ||
2673 | To be called for frame-based redisplay, only. */ | |
2674 | ||
2675 | static void | |
971de7fb | 2676 | fill_up_glyph_row_with_spaces (struct glyph_row *row) |
5f5c8ee5 GM |
2677 | { |
2678 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2679 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2680 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2681 | } | |
2682 | ||
2683 | ||
2684 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2685 | frame-based redisplay only. */ | |
2686 | ||
2687 | static void | |
971de7fb | 2688 | fill_up_glyph_row_area_with_spaces (struct glyph_row *row, int area) |
5f5c8ee5 GM |
2689 | { |
2690 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2691 | { | |
2692 | struct glyph *end = row->glyphs[area + 1]; | |
2693 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2694 | ||
2695 | while (text < end) | |
2696 | *text++ = space_glyph; | |
2697 | row->used[area] = text - row->glyphs[area]; | |
2698 | } | |
2699 | } | |
2700 | ||
2701 | ||
2702 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2703 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2704 | ||
2705 | static void | |
971de7fb | 2706 | fill_up_frame_row_with_spaces (struct glyph_row *row, int upto) |
5f5c8ee5 GM |
2707 | { |
2708 | int i = row->used[TEXT_AREA]; | |
2709 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2710 | |
5f5c8ee5 GM |
2711 | while (i < upto) |
2712 | glyph[i++] = space_glyph; | |
2713 | ||
2714 | row->used[TEXT_AREA] = i; | |
2715 | } | |
2716 | ||
2717 | ||
2718 | \f | |
2719 | /********************************************************************** | |
2720 | Mirroring operations on frame matrices in window matrices | |
2721 | **********************************************************************/ | |
2722 | ||
2723 | /* Set frame being updated via frame-based redisplay to F. This | |
2724 | function must be called before updates to make explicit that we are | |
2725 | working on frame matrices or not. */ | |
2726 | ||
2727 | static INLINE void | |
971de7fb | 2728 | set_frame_matrix_frame (struct frame *f) |
5f5c8ee5 GM |
2729 | { |
2730 | frame_matrix_frame = f; | |
2731 | } | |
2732 | ||
2733 | ||
2734 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2735 | DESIRED_MATRIX is the desired matrix corresponding to | |
2736 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2737 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2738 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2739 | done in frame matrices, and that we have to perform analogous | |
2740 | operations in window matrices of frame_matrix_frame. */ | |
2741 | ||
2742 | static INLINE void | |
971de7fb | 2743 | make_current (struct glyph_matrix *desired_matrix, struct glyph_matrix *current_matrix, int row) |
5f5c8ee5 GM |
2744 | { |
2745 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2746 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
e876ff42 | 2747 | int mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2748 | |
2749 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2750 | between both rows, and does a structure assignment otherwise. */ | |
2751 | assign_row (current_row, desired_row); | |
2752 | ||
2753 | /* Enable current_row to mark it as valid. */ | |
2754 | current_row->enabled_p = 1; | |
e876ff42 | 2755 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2756 | |
2757 | /* If we are called on frame matrices, perform analogous operations | |
2758 | for window matrices. */ | |
2759 | if (frame_matrix_frame) | |
2760 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); | |
2761 | } | |
2762 | ||
2763 | ||
2764 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2765 | W's frame which has been made current (by swapping pointers between | |
2766 | current and desired matrix). Perform analogous operations in the | |
2767 | matrices of leaf windows in the window tree rooted at W. */ | |
2768 | ||
2769 | static void | |
971de7fb | 2770 | mirror_make_current (struct window *w, int frame_row) |
5f5c8ee5 GM |
2771 | { |
2772 | while (w) | |
2773 | { | |
2774 | if (!NILP (w->hchild)) | |
2775 | mirror_make_current (XWINDOW (w->hchild), frame_row); | |
2776 | else if (!NILP (w->vchild)) | |
2777 | mirror_make_current (XWINDOW (w->vchild), frame_row); | |
2778 | else | |
2779 | { | |
2780 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2781 | here because the checks performed in debug mode there | |
2782 | will not allow the conversion. */ | |
2783 | int row = frame_row - w->desired_matrix->matrix_y; | |
2784 | ||
2785 | /* If FRAME_ROW is within W, assign the desired row to the | |
2786 | current row (exchanging glyph pointers). */ | |
2787 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
2788 | { | |
2789 | struct glyph_row *current_row | |
2790 | = MATRIX_ROW (w->current_matrix, row); | |
2791 | struct glyph_row *desired_row | |
2792 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
2793 | |
2794 | if (desired_row->enabled_p) | |
2795 | assign_row (current_row, desired_row); | |
2796 | else | |
2797 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 | 2798 | current_row->enabled_p = 1; |
d009ae66 EZ |
2799 | |
2800 | /* Set the Y coordinate of the mode/header line's row. | |
2801 | It is needed in draw_row_with_mouse_face to find the | |
2802 | screen coordinates. (Window-based redisplay sets | |
2803 | this in update_window, but no one seems to do that | |
2804 | for frame-based redisplay.) */ | |
2805 | if (current_row->mode_line_p) | |
2806 | current_row->y = row; | |
5f5c8ee5 GM |
2807 | } |
2808 | } | |
177c0ea7 | 2809 | |
5f5c8ee5 GM |
2810 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2811 | } | |
2812 | } | |
2813 | ||
2814 | ||
2815 | /* Perform row dance after scrolling. We are working on the range of | |
2816 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
2817 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
2818 | row I in the range 0 <= I < NLINES, the index of the original line | |
2819 | to move to I. This index is relative to the row range, i.e. 0 <= | |
2820 | index < NLINES. RETAINED_P is a vector containing zero for each | |
2821 | row 0 <= I < NLINES which is empty. | |
2822 | ||
2823 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 2824 | |
5f5c8ee5 | 2825 | void |
6f704c76 DN |
2826 | mirrored_line_dance (struct glyph_matrix *matrix, int unchanged_at_top, int nlines, |
2827 | int *copy_from, char *retained_p) | |
5f5c8ee5 GM |
2828 | { |
2829 | /* A copy of original rows. */ | |
2830 | struct glyph_row *old_rows; | |
2831 | ||
2832 | /* Rows to assign to. */ | |
2833 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 2834 | |
5f5c8ee5 GM |
2835 | int i; |
2836 | ||
2837 | /* Make a copy of the original rows. */ | |
2838 | old_rows = (struct glyph_row *) alloca (nlines * sizeof *old_rows); | |
72af86bd | 2839 | memcpy (old_rows, new_rows, nlines * sizeof *old_rows); |
5f5c8ee5 GM |
2840 | |
2841 | /* Assign new rows, maybe clear lines. */ | |
2842 | for (i = 0; i < nlines; ++i) | |
2843 | { | |
2844 | int enabled_before_p = new_rows[i].enabled_p; | |
2845 | ||
2846 | xassert (i + unchanged_at_top < matrix->nrows); | |
2847 | xassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
2848 | new_rows[i] = old_rows[copy_from[i]]; | |
2849 | new_rows[i].enabled_p = enabled_before_p; | |
2850 | ||
2851 | /* RETAINED_P is zero for empty lines. */ | |
2852 | if (!retained_p[copy_from[i]]) | |
2853 | new_rows[i].enabled_p = 0; | |
2854 | } | |
2855 | ||
153a073c | 2856 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 GM |
2857 | if (frame_matrix_frame) |
2858 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), | |
2859 | unchanged_at_top, nlines, copy_from, retained_p); | |
2860 | } | |
2861 | ||
2862 | ||
a13396c9 | 2863 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 2864 | the current frame matrix. */ |
a13396c9 GM |
2865 | |
2866 | static void | |
971de7fb | 2867 | sync_window_with_frame_matrix_rows (struct window *w) |
a13396c9 GM |
2868 | { |
2869 | struct frame *f = XFRAME (w->frame); | |
2870 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
075c507b | 2871 | int left, right, x, width; |
a13396c9 | 2872 | |
5cb88111 | 2873 | /* Preconditions: W must be a leaf window on a tty frame. */ |
a13396c9 | 2874 | xassert (NILP (w->hchild) && NILP (w->vchild)); |
a13396c9 GM |
2875 | xassert (!FRAME_WINDOW_P (f)); |
2876 | ||
7df02016 KS |
2877 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
2878 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
2879 | x = w->current_matrix->matrix_x; |
2880 | width = w->current_matrix->matrix_w; | |
2881 | ||
a13396c9 GM |
2882 | window_row = w->current_matrix->rows; |
2883 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 2884 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 2885 | |
5cb88111 | 2886 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 2887 | { |
5cb88111 GM |
2888 | window_row->glyphs[LEFT_MARGIN_AREA] |
2889 | = frame_row->glyphs[0] + x; | |
2890 | window_row->glyphs[TEXT_AREA] | |
2891 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
2892 | window_row->glyphs[LAST_AREA] | |
2893 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
2894 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
2895 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
2896 | } |
2897 | } | |
2898 | ||
2899 | ||
2900 | /* Return the window in the window tree rooted in W containing frame | |
2901 | row ROW. Value is null if none is found. */ | |
2902 | ||
09ad5a91 | 2903 | static struct window * |
971de7fb | 2904 | frame_row_to_window (struct window *w, int row) |
a13396c9 GM |
2905 | { |
2906 | struct window *found = NULL; | |
177c0ea7 | 2907 | |
a13396c9 GM |
2908 | while (w && !found) |
2909 | { | |
2910 | if (!NILP (w->hchild)) | |
2911 | found = frame_row_to_window (XWINDOW (w->hchild), row); | |
2912 | else if (!NILP (w->vchild)) | |
2913 | found = frame_row_to_window (XWINDOW (w->vchild), row); | |
7df02016 KS |
2914 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
2915 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 2916 | found = w; |
177c0ea7 | 2917 | |
a13396c9 GM |
2918 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2919 | } | |
2920 | ||
2921 | return found; | |
2922 | } | |
2923 | ||
2924 | ||
5f5c8ee5 GM |
2925 | /* Perform a line dance in the window tree rooted at W, after |
2926 | scrolling a frame matrix in mirrored_line_dance. | |
2927 | ||
2928 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
2929 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
2930 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
2931 | I < NLINES, the index of the original line to move to I. This | |
2932 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
2933 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
2934 | which is empty. */ | |
2935 | ||
2936 | static void | |
971de7fb | 2937 | mirror_line_dance (struct window *w, int unchanged_at_top, int nlines, int *copy_from, char *retained_p) |
5f5c8ee5 GM |
2938 | { |
2939 | while (w) | |
2940 | { | |
2941 | if (!NILP (w->hchild)) | |
2942 | mirror_line_dance (XWINDOW (w->hchild), unchanged_at_top, | |
2943 | nlines, copy_from, retained_p); | |
2944 | else if (!NILP (w->vchild)) | |
2945 | mirror_line_dance (XWINDOW (w->vchild), unchanged_at_top, | |
2946 | nlines, copy_from, retained_p); | |
2947 | else | |
2948 | { | |
2949 | /* W is a leaf window, and we are working on its current | |
2950 | matrix m. */ | |
2951 | struct glyph_matrix *m = w->current_matrix; | |
a13396c9 | 2952 | int i, sync_p = 0; |
5f5c8ee5 GM |
2953 | struct glyph_row *old_rows; |
2954 | ||
2955 | /* Make a copy of the original rows of matrix m. */ | |
2956 | old_rows = (struct glyph_row *) alloca (m->nrows * sizeof *old_rows); | |
72af86bd | 2957 | memcpy (old_rows, m->rows, m->nrows * sizeof *old_rows); |
5f5c8ee5 GM |
2958 | |
2959 | for (i = 0; i < nlines; ++i) | |
2960 | { | |
2961 | /* Frame relative line assigned to. */ | |
2962 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 2963 | |
5f5c8ee5 GM |
2964 | /* Frame relative line assigned. */ |
2965 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 2966 | |
5f5c8ee5 GM |
2967 | /* Window relative line assigned to. */ |
2968 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 2969 | |
5f5c8ee5 GM |
2970 | /* Window relative line assigned. */ |
2971 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 2972 | |
5f5c8ee5 GM |
2973 | /* Is assigned line inside window? */ |
2974 | int from_inside_window_p | |
2975 | = window_from >= 0 && window_from < m->matrix_h; | |
177c0ea7 | 2976 | |
a13396c9 GM |
2977 | /* Is assigned to line inside window? */ |
2978 | int to_inside_window_p | |
2979 | = window_to >= 0 && window_to < m->matrix_h; | |
177c0ea7 | 2980 | |
a13396c9 | 2981 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 2982 | { |
5f5c8ee5 GM |
2983 | /* Enabled setting before assignment. */ |
2984 | int enabled_before_p; | |
177c0ea7 | 2985 | |
5f5c8ee5 GM |
2986 | /* Do the assignment. The enabled_p flag is saved |
2987 | over the assignment because the old redisplay did | |
2988 | that. */ | |
2989 | enabled_before_p = m->rows[window_to].enabled_p; | |
2990 | m->rows[window_to] = old_rows[window_from]; | |
2991 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 2992 | |
5f5c8ee5 GM |
2993 | /* If frame line is empty, window line is empty, too. */ |
2994 | if (!retained_p[copy_from[i]]) | |
2995 | m->rows[window_to].enabled_p = 0; | |
2996 | } | |
a13396c9 GM |
2997 | else if (to_inside_window_p) |
2998 | { | |
2999 | /* A copy between windows. This is an infrequent | |
3000 | case not worth optimizing. */ | |
3001 | struct frame *f = XFRAME (w->frame); | |
3002 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); | |
3003 | struct window *w2; | |
3004 | struct glyph_matrix *m2; | |
3005 | int m2_from; | |
3006 | ||
fe8b8401 | 3007 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
3008 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
3009 | -nw', FROM_FRAME sometimes has no associated window. | |
3010 | This check avoids a segfault if W2 is null. */ | |
3011 | if (w2) | |
3012 | { | |
3013 | m2 = w2->current_matrix; | |
3014 | m2_from = frame_from - m2->matrix_y; | |
3015 | copy_row_except_pointers (m->rows + window_to, | |
3016 | m2->rows + m2_from); | |
3017 | ||
3018 | /* If frame line is empty, window line is empty, too. */ | |
3019 | if (!retained_p[copy_from[i]]) | |
3020 | m->rows[window_to].enabled_p = 0; | |
3021 | } | |
a13396c9 GM |
3022 | sync_p = 1; |
3023 | } | |
3024 | else if (from_inside_window_p) | |
3025 | sync_p = 1; | |
5f5c8ee5 | 3026 | } |
a13396c9 GM |
3027 | |
3028 | /* If there was a copy between windows, make sure glyph | |
3029 | pointers are in sync with the frame matrix. */ | |
3030 | if (sync_p) | |
3031 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 3032 | |
5f5c8ee5 GM |
3033 | /* Check that no pointers are lost. */ |
3034 | CHECK_MATRIX (m); | |
3035 | } | |
3036 | ||
3037 | /* Next window on same level. */ | |
3038 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3039 | } | |
3040 | } | |
3041 | ||
3042 | ||
3043 | #if GLYPH_DEBUG | |
3044 | ||
3045 | /* Check that window and frame matrices agree about their | |
3046 | understanding where glyphs of the rows are to find. For each | |
3047 | window in the window tree rooted at W, check that rows in the | |
3048 | matrices of leaf window agree with their frame matrices about | |
3049 | glyph pointers. */ | |
3050 | ||
3051 | void | |
59fc5cf9 | 3052 | check_window_matrix_pointers (struct window *w) |
5f5c8ee5 GM |
3053 | { |
3054 | while (w) | |
3055 | { | |
3056 | if (!NILP (w->hchild)) | |
3057 | check_window_matrix_pointers (XWINDOW (w->hchild)); | |
3058 | else if (!NILP (w->vchild)) | |
3059 | check_window_matrix_pointers (XWINDOW (w->vchild)); | |
3060 | else | |
60a8948a | 3061 | { |
5f5c8ee5 GM |
3062 | struct frame *f = XFRAME (w->frame); |
3063 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); | |
3064 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 3065 | } |
177c0ea7 | 3066 | |
5f5c8ee5 GM |
3067 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3068 | } | |
3069 | } | |
3070 | ||
3071 | ||
3072 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
3073 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
3074 | each row in WINDOW_MATRIX check that it's a slice of the | |
3075 | corresponding frame row. If it isn't, abort. */ | |
3076 | ||
3077 | static void | |
59fc5cf9 AS |
3078 | check_matrix_pointers (struct glyph_matrix *window_matrix, |
3079 | struct glyph_matrix *frame_matrix) | |
5f5c8ee5 GM |
3080 | { |
3081 | /* Row number in WINDOW_MATRIX. */ | |
3082 | int i = 0; | |
3083 | ||
3084 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
3085 | int j = window_matrix->matrix_y; | |
3086 | ||
177c0ea7 | 3087 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
3088 | slice of the row in the frame matrix. If it isn't we didn't |
3089 | mirror an operation on the frame matrix correctly. */ | |
3090 | while (i < window_matrix->nrows) | |
3091 | { | |
3092 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
3093 | frame_matrix->rows + j)) | |
3094 | abort (); | |
3095 | ++i, ++j; | |
3096 | } | |
3097 | } | |
3098 | ||
3099 | #endif /* GLYPH_DEBUG != 0 */ | |
3100 | ||
3101 | ||
3102 | \f | |
3103 | /********************************************************************** | |
3104 | VPOS and HPOS translations | |
3105 | **********************************************************************/ | |
3106 | ||
3107 | #if GLYPH_DEBUG | |
3108 | ||
3109 | /* Translate vertical position VPOS which is relative to window W to a | |
3110 | vertical position relative to W's frame. */ | |
3111 | ||
3112 | static int | |
59fc5cf9 | 3113 | window_to_frame_vpos (struct window *w, int vpos) |
5f5c8ee5 GM |
3114 | { |
3115 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 3116 | |
5f5c8ee5 GM |
3117 | xassert (!FRAME_WINDOW_P (f)); |
3118 | xassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); | |
7df02016 KS |
3119 | vpos += WINDOW_TOP_EDGE_LINE (w); |
3120 | xassert (vpos >= 0 && vpos <= FRAME_LINES (f)); | |
5f5c8ee5 GM |
3121 | return vpos; |
3122 | } | |
3123 | ||
3124 | ||
3125 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 3126 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
3127 | |
3128 | static int | |
59fc5cf9 | 3129 | window_to_frame_hpos (struct window *w, int hpos) |
5f5c8ee5 | 3130 | { |
82f4a138 | 3131 | xassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 3132 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
3133 | return hpos; |
3134 | } | |
177c0ea7 | 3135 | |
5f5c8ee5 GM |
3136 | #endif /* GLYPH_DEBUG */ |
3137 | ||
3138 | ||
3139 | \f | |
3140 | /********************************************************************** | |
3141 | Redrawing Frames | |
3142 | **********************************************************************/ | |
3143 | ||
3144 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, | |
7ee72033 | 3145 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. */) |
5842a27b | 3146 | (Lisp_Object frame) |
5f5c8ee5 GM |
3147 | { |
3148 | struct frame *f; | |
3149 | ||
b7826503 | 3150 | CHECK_LIVE_FRAME (frame); |
5f5c8ee5 GM |
3151 | f = XFRAME (frame); |
3152 | ||
3153 | /* Ignore redraw requests, if frame has no glyphs yet. | |
3154 | (Implementation note: It still has to be checked why we are | |
3155 | called so early here). */ | |
3156 | if (!glyphs_initialized_initially_p) | |
3157 | return Qnil; | |
3158 | ||
3159 | update_begin (f); | |
3224dac1 | 3160 | #ifdef MSDOS |
f2adda5e | 3161 | if (FRAME_MSDOS_P (f)) |
79d39b69 | 3162 | FRAME_TERMINAL (f)->set_terminal_modes_hook (FRAME_TERMINAL (f)); |
3224dac1 | 3163 | #endif |
385ed61f | 3164 | clear_frame (f); |
5f5c8ee5 GM |
3165 | clear_current_matrices (f); |
3166 | update_end (f); | |
daf01701 | 3167 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3168 | fflush (FRAME_TTY (f)->output); |
5f5c8ee5 GM |
3169 | windows_or_buffers_changed++; |
3170 | /* Mark all windows as inaccurate, so that every window will have | |
3171 | its redisplay done. */ | |
3172 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
3173 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
3174 | f->garbaged = 0; | |
3175 | return Qnil; | |
3176 | } | |
3177 | ||
3178 | ||
3179 | /* Redraw frame F. This is nothing more than a call to the Lisp | |
3180 | function redraw-frame. */ | |
3181 | ||
3182 | void | |
971de7fb | 3183 | redraw_frame (struct frame *f) |
5f5c8ee5 GM |
3184 | { |
3185 | Lisp_Object frame; | |
3186 | XSETFRAME (frame, f); | |
3187 | Fredraw_frame (frame); | |
3188 | } | |
3189 | ||
3190 | ||
3191 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
7ee72033 | 3192 | doc: /* Clear and redisplay all visible frames. */) |
5842a27b | 3193 | (void) |
5f5c8ee5 GM |
3194 | { |
3195 | Lisp_Object tail, frame; | |
3196 | ||
3197 | FOR_EACH_FRAME (tail, frame) | |
3198 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
3199 | Fredraw_frame (frame); | |
3200 | ||
3201 | return Qnil; | |
3202 | } | |
3203 | ||
3204 | ||
3205 | /* This is used when frame_garbaged is set. Call Fredraw_frame on all | |
3206 | visible frames marked as garbaged. */ | |
3207 | ||
3208 | void | |
971de7fb | 3209 | redraw_garbaged_frames (void) |
5f5c8ee5 GM |
3210 | { |
3211 | Lisp_Object tail, frame; | |
3212 | ||
3213 | FOR_EACH_FRAME (tail, frame) | |
3214 | if (FRAME_VISIBLE_P (XFRAME (frame)) | |
3215 | && FRAME_GARBAGED_P (XFRAME (frame))) | |
3216 | Fredraw_frame (frame); | |
3217 | } | |
3218 | ||
3219 | ||
3220 | \f | |
5f5c8ee5 GM |
3221 | /*********************************************************************** |
3222 | Frame Update | |
3223 | ***********************************************************************/ | |
4588ec20 | 3224 | |
5f5c8ee5 | 3225 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 3226 | |
5f5c8ee5 GM |
3227 | If FORCE_P is non-zero, don't let redisplay be stopped by detecting |
3228 | pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try | |
3229 | scrolling. | |
177c0ea7 | 3230 | |
5f5c8ee5 | 3231 | Value is non-zero if redisplay was stopped due to pending input. */ |
4588ec20 | 3232 | |
5f5c8ee5 | 3233 | int |
971de7fb | 3234 | update_frame (struct frame *f, int force_p, int inhibit_hairy_id_p) |
5f5c8ee5 GM |
3235 | { |
3236 | /* 1 means display has been paused because of pending input. */ | |
3237 | int paused_p; | |
3238 | struct window *root_window = XWINDOW (f->root_window); | |
3239 | ||
a2130dbb KS |
3240 | if (redisplay_dont_pause) |
3241 | force_p = 1; | |
d012c62b | 3242 | #if PERIODIC_PREEMPTION_CHECKING |
a2130dbb KS |
3243 | else if (NILP (Vredisplay_preemption_period)) |
3244 | force_p = 1; | |
3245 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
3246 | { |
3247 | EMACS_TIME tm; | |
3248 | double p = XFLOATINT (Vredisplay_preemption_period); | |
3249 | int sec, usec; | |
3250 | ||
993d4ab6 KS |
3251 | if (detect_input_pending_ignore_squeezables ()) |
3252 | { | |
3253 | paused_p = 1; | |
3254 | goto do_pause; | |
3255 | } | |
3256 | ||
d012c62b KS |
3257 | sec = (int) p; |
3258 | usec = (p - sec) * 1000000; | |
3259 | ||
3260 | EMACS_GET_TIME (tm); | |
3261 | EMACS_SET_SECS_USECS (preemption_period, sec, usec); | |
3262 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
3263 | } | |
3264 | #endif | |
3265 | ||
5f5c8ee5 | 3266 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3267 | { |
5f5c8ee5 GM |
3268 | /* We are working on window matrix basis. All windows whose |
3269 | flag must_be_updated_p is set have to be updated. */ | |
3270 | ||
3271 | /* Record that we are not working on frame matrices. */ | |
3272 | set_frame_matrix_frame (NULL); | |
3273 | ||
3274 | /* Update all windows in the window tree of F, maybe stopping | |
3275 | when pending input is detected. */ | |
3276 | update_begin (f); | |
3277 | ||
3278 | /* Update the menu bar on X frames that don't have toolkit | |
3279 | support. */ | |
3280 | if (WINDOWP (f->menu_bar_window)) | |
3281 | update_window (XWINDOW (f->menu_bar_window), 1); | |
3282 | ||
3283 | /* Update the tool-bar window, if present. */ | |
9ea173e8 | 3284 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3285 | { |
9ea173e8 | 3286 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3287 | |
3288 | /* Update tool-bar window. */ | |
3289 | if (w->must_be_updated_p) | |
4588ec20 | 3290 | { |
153a073c PJ |
3291 | Lisp_Object tem; |
3292 | ||
5f5c8ee5 GM |
3293 | update_window (w, 1); |
3294 | w->must_be_updated_p = 0; | |
3295 | ||
3296 | /* Swap tool-bar strings. We swap because we want to | |
3297 | reuse strings. */ | |
9ea173e8 GM |
3298 | tem = f->current_tool_bar_string; |
3299 | f->current_tool_bar_string = f->desired_tool_bar_string; | |
3300 | f->desired_tool_bar_string = tem; | |
4588ec20 JB |
3301 | } |
3302 | } | |
177c0ea7 | 3303 | |
5f5c8ee5 GM |
3304 | |
3305 | /* Update windows. */ | |
3306 | paused_p = update_window_tree (root_window, force_p); | |
3307 | update_end (f); | |
177c0ea7 | 3308 | |
6b61353c | 3309 | /* This flush is a performance bottleneck under X, |
e581a466 | 3310 | and it doesn't seem to be necessary anyway (in general). |
6b61353c | 3311 | It is necessary when resizing the window with the mouse, or |
e581a466 | 3312 | at least the fringes are not redrawn in a timely manner. ++kfs */ |
6b61353c | 3313 | if (f->force_flush_display_p) |
e581a466 KL |
3314 | { |
3315 | FRAME_RIF (f)->flush_display (f); | |
3316 | f->force_flush_display_p = 0; | |
3317 | } | |
4588ec20 | 3318 | } |
5f5c8ee5 GM |
3319 | else |
3320 | { | |
3321 | /* We are working on frame matrix basis. Set the frame on whose | |
3322 | frame matrix we operate. */ | |
3323 | set_frame_matrix_frame (f); | |
3324 | ||
868dd24b | 3325 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3326 | build_frame_matrix (f); |
177c0ea7 | 3327 | |
868dd24b GM |
3328 | /* Update the display */ |
3329 | update_begin (f); | |
5f5c8ee5 | 3330 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3331 | update_end (f); |
3332 | ||
7d2f1216 | 3333 | if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f)) |
3224dac1 | 3334 | { |
0b0d3e0b KL |
3335 | if (FRAME_TTY (f)->termscript) |
3336 | fflush (FRAME_TTY (f)->termscript); | |
7d2f1216 EZ |
3337 | if (FRAME_TERMCAP_P (f)) |
3338 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3339 | } |
868dd24b | 3340 | |
5f5c8ee5 | 3341 | /* Check window matrices for lost pointers. */ |
2d5912c1 | 3342 | #if GLYPH_DEBUG |
9b0e97aa GM |
3343 | check_window_matrix_pointers (root_window); |
3344 | add_frame_display_history (f, paused_p); | |
3345 | #endif | |
5f5c8ee5 GM |
3346 | } |
3347 | ||
ef1b0ba7 | 3348 | #if PERIODIC_PREEMPTION_CHECKING |
993d4ab6 | 3349 | do_pause: |
ef1b0ba7 | 3350 | #endif |
5f5c8ee5 GM |
3351 | /* Reset flags indicating that a window should be updated. */ |
3352 | set_window_update_flags (root_window, 0); | |
177c0ea7 | 3353 | |
868dd24b | 3354 | display_completed = !paused_p; |
5f5c8ee5 | 3355 | return paused_p; |
4588ec20 | 3356 | } |
5f5c8ee5 GM |
3357 | |
3358 | ||
4588ec20 | 3359 | \f |
5f5c8ee5 GM |
3360 | /************************************************************************ |
3361 | Window-based updates | |
3362 | ************************************************************************/ | |
3363 | ||
3364 | /* Perform updates in window tree rooted at W. FORCE_P non-zero means | |
3365 | don't stop updating when input is pending. */ | |
3366 | ||
3367 | static int | |
971de7fb | 3368 | update_window_tree (struct window *w, int force_p) |
5f5c8ee5 GM |
3369 | { |
3370 | int paused_p = 0; | |
177c0ea7 | 3371 | |
5f5c8ee5 GM |
3372 | while (w && !paused_p) |
3373 | { | |
3374 | if (!NILP (w->hchild)) | |
3375 | paused_p |= update_window_tree (XWINDOW (w->hchild), force_p); | |
3376 | else if (!NILP (w->vchild)) | |
3377 | paused_p |= update_window_tree (XWINDOW (w->vchild), force_p); | |
3378 | else if (w->must_be_updated_p) | |
3379 | paused_p |= update_window (w, force_p); | |
3380 | ||
3381 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3382 | } | |
3383 | ||
3384 | return paused_p; | |
3385 | } | |
3386 | ||
3387 | ||
3388 | /* Update window W if its flag must_be_updated_p is non-zero. If | |
3389 | FORCE_P is non-zero, don't stop updating if input is pending. */ | |
3390 | ||
3391 | void | |
971de7fb | 3392 | update_single_window (struct window *w, int force_p) |
5f5c8ee5 GM |
3393 | { |
3394 | if (w->must_be_updated_p) | |
3395 | { | |
3396 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
3397 | ||
3398 | /* Record that this is not a frame-based redisplay. */ | |
3399 | set_frame_matrix_frame (NULL); | |
3400 | ||
a2130dbb KS |
3401 | if (redisplay_dont_pause) |
3402 | force_p = 1; | |
d012c62b | 3403 | #if PERIODIC_PREEMPTION_CHECKING |
a2130dbb KS |
3404 | else if (NILP (Vredisplay_preemption_period)) |
3405 | force_p = 1; | |
3406 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
3407 | { |
3408 | EMACS_TIME tm; | |
3409 | double p = XFLOATINT (Vredisplay_preemption_period); | |
3410 | int sec, usec; | |
3411 | ||
3412 | sec = (int) p; | |
3413 | usec = (p - sec) * 1000000; | |
3414 | ||
3415 | EMACS_GET_TIME (tm); | |
3416 | EMACS_SET_SECS_USECS (preemption_period, sec, usec); | |
3417 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
3418 | } | |
3419 | #endif | |
3420 | ||
5f5c8ee5 GM |
3421 | /* Update W. */ |
3422 | update_begin (f); | |
3423 | update_window (w, force_p); | |
3424 | update_end (f); | |
4588ec20 | 3425 | |
5f5c8ee5 GM |
3426 | /* Reset flag in W. */ |
3427 | w->must_be_updated_p = 0; | |
3428 | } | |
3429 | } | |
4588ec20 | 3430 | |
93e023fc | 3431 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 3432 | |
408f5064 GM |
3433 | /* Redraw lines from the current matrix of window W that are |
3434 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
3435 | ||
3436 | static void | |
971de7fb | 3437 | redraw_overlapped_rows (struct window *w, int yb) |
408f5064 | 3438 | { |
d8ee7803 | 3439 | int i; |
fa971ac3 | 3440 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3fc809e2 | 3441 | |
408f5064 GM |
3442 | /* If rows overlapping others have been changed, the rows being |
3443 | overlapped have to be redrawn. This won't draw lines that have | |
3444 | already been drawn in update_window_line because overlapped_p in | |
3445 | desired rows is 0, so after row assignment overlapped_p in | |
3446 | current rows is 0. */ | |
3447 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
3448 | { | |
e876ff42 | 3449 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
3450 | |
3451 | if (!row->enabled_p) | |
3452 | break; | |
3453 | else if (row->mode_line_p) | |
3454 | continue; | |
177c0ea7 | 3455 | |
408f5064 GM |
3456 | if (row->overlapped_p) |
3457 | { | |
3458 | enum glyph_row_area area; | |
177c0ea7 | 3459 | |
408f5064 GM |
3460 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
3461 | { | |
3462 | updated_row = row; | |
3463 | updated_area = area; | |
fa971ac3 KL |
3464 | FRAME_RIF (f)->cursor_to (i, 0, row->y, |
3465 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 3466 | if (row->used[area]) |
fa971ac3 KL |
3467 | FRAME_RIF (f)->write_glyphs (row->glyphs[area], |
3468 | row->used[area]); | |
3469 | FRAME_RIF (f)->clear_end_of_line (-1); | |
408f5064 | 3470 | } |
177c0ea7 | 3471 | |
408f5064 GM |
3472 | row->overlapped_p = 0; |
3473 | } | |
3474 | ||
e876ff42 | 3475 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
3476 | break; |
3477 | } | |
3478 | } | |
3479 | ||
3480 | ||
3481 | /* Redraw lines from the current matrix of window W that overlap | |
3482 | others. YB is bottom-most y-position in W. */ | |
3483 | ||
3484 | static void | |
971de7fb | 3485 | redraw_overlapping_rows (struct window *w, int yb) |
408f5064 GM |
3486 | { |
3487 | int i, bottom_y; | |
3488 | struct glyph_row *row; | |
fa971ac3 | 3489 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
3fc809e2 | 3490 | |
408f5064 GM |
3491 | for (i = 0; i < w->current_matrix->nrows; ++i) |
3492 | { | |
3493 | row = w->current_matrix->rows + i; | |
3494 | ||
3495 | if (!row->enabled_p) | |
3496 | break; | |
3497 | else if (row->mode_line_p) | |
3498 | continue; | |
177c0ea7 | 3499 | |
408f5064 GM |
3500 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
3501 | ||
b4b2c2ca | 3502 | if (row->overlapping_p) |
408f5064 | 3503 | { |
41124e06 YM |
3504 | int overlaps = 0; |
3505 | ||
b4b2c2ca | 3506 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) && i > 0 |
41124e06 YM |
3507 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) |
3508 | overlaps |= OVERLAPS_PRED; | |
b4b2c2ca | 3509 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) && bottom_y < yb |
41124e06 YM |
3510 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) |
3511 | overlaps |= OVERLAPS_SUCC; | |
3512 | ||
3513 | if (overlaps) | |
3514 | { | |
3515 | if (row->used[LEFT_MARGIN_AREA]) | |
3516 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
3517 | ||
3518 | if (row->used[TEXT_AREA]) | |
3519 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
3520 | ||
3521 | if (row->used[RIGHT_MARGIN_AREA]) | |
3522 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
3523 | ||
3524 | /* Record in neighbour rows that ROW overwrites part of | |
3525 | their display. */ | |
3526 | if (overlaps & OVERLAPS_PRED) | |
3527 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
3528 | if (overlaps & OVERLAPS_SUCC) | |
3529 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
3530 | } | |
408f5064 GM |
3531 | } |
3532 | ||
3533 | if (bottom_y >= yb) | |
3534 | break; | |
3535 | } | |
3536 | } | |
3537 | ||
93e023fc KS |
3538 | #endif /* HAVE_WINDOW_SYSTEM */ |
3539 | ||
408f5064 | 3540 | |
09ad5a91 | 3541 | #if defined GLYPH_DEBUG && 0 |
93962bfa GM |
3542 | |
3543 | /* Check that no row in the current matrix of window W is enabled | |
3544 | which is below what's displayed in the window. */ | |
3545 | ||
09ad5a91 | 3546 | static void |
971de7fb | 3547 | check_current_matrix_flags (struct window *w) |
93962bfa GM |
3548 | { |
3549 | int last_seen_p = 0; | |
3550 | int i, yb = window_text_bottom_y (w); | |
3551 | ||
3552 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
3553 | { | |
3554 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
3555 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3556 | last_seen_p = 1; | |
3557 | else if (last_seen_p && row->enabled_p) | |
3558 | abort (); | |
3559 | } | |
3560 | } | |
3561 | ||
3562 | #endif /* GLYPH_DEBUG */ | |
3563 | ||
3564 | ||
5f5c8ee5 GM |
3565 | /* Update display of window W. FORCE_P non-zero means that we should |
3566 | not stop when detecting pending input. */ | |
3567 | ||
3568 | static int | |
971de7fb | 3569 | update_window (struct window *w, int force_p) |
4588ec20 | 3570 | { |
5f5c8ee5 GM |
3571 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
3572 | int paused_p; | |
d012c62b | 3573 | #if !PERIODIC_PREEMPTION_CHECKING |
5f5c8ee5 | 3574 | int preempt_count = baud_rate / 2400 + 1; |
d012c62b | 3575 | #endif |
597cfb3f | 3576 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
b96fd3e8 | 3577 | #if GLYPH_DEBUG |
5f5c8ee5 | 3578 | /* Check that W's frame doesn't have glyph matrices. */ |
82f4a138 | 3579 | xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 3580 | #endif |
5f5c8ee5 GM |
3581 | |
3582 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb KS |
3583 | #if !PERIODIC_PREEMPTION_CHECKING |
3584 | if (!force_p) | |
a2d5fca0 | 3585 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3586 | #endif |
4588ec20 | 3587 | |
5f5c8ee5 GM |
3588 | /* If forced to complete the update, or if no input is pending, do |
3589 | the update. */ | |
8fd9a666 | 3590 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 3591 | { |
5f5c8ee5 GM |
3592 | struct glyph_row *row, *end; |
3593 | struct glyph_row *mode_line_row; | |
56974e03 | 3594 | struct glyph_row *header_line_row; |
e87b8809 | 3595 | int yb, changed_p = 0, mouse_face_overwritten_p = 0, n_updated; |
5f5c8ee5 GM |
3596 | |
3597 | rif->update_window_begin_hook (w); | |
3598 | yb = window_text_bottom_y (w); | |
3599 | ||
153a073c PJ |
3600 | /* If window has a header line, update it before everything else. |
3601 | Adjust y-positions of other rows by the header line height. */ | |
5f5c8ee5 GM |
3602 | row = desired_matrix->rows; |
3603 | end = row + desired_matrix->nrows - 1; | |
177c0ea7 | 3604 | |
5f5c8ee5 | 3605 | if (row->mode_line_p) |
56974e03 GM |
3606 | { |
3607 | header_line_row = row; | |
3608 | ++row; | |
3609 | } | |
3610 | else | |
3611 | header_line_row = NULL; | |
5f5c8ee5 GM |
3612 | |
3613 | /* Update the mode line, if necessary. */ | |
3614 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
3615 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
3616 | { | |
3617 | mode_line_row->y = yb; | |
3618 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
3619 | desired_matrix), |
3620 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3621 | } |
3622 | ||
3623 | /* Find first enabled row. Optimizations in redisplay_internal | |
3624 | may lead to an update with only one row enabled. There may | |
3625 | be also completely empty matrices. */ | |
3626 | while (row < end && !row->enabled_p) | |
3627 | ++row; | |
177c0ea7 | 3628 | |
bfdcafe1 | 3629 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 3630 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
3631 | { |
3632 | int rc = scrolling_window (w, header_line_row != NULL); | |
3633 | if (rc < 0) | |
3634 | { | |
3635 | /* All rows were found to be equal. */ | |
3636 | paused_p = 0; | |
3637 | goto set_cursor; | |
3638 | } | |
3639 | else if (rc > 0) | |
6b61353c KH |
3640 | { |
3641 | /* We've scrolled the display. */ | |
3642 | force_p = 1; | |
3643 | changed_p = 1; | |
3644 | } | |
5f5c8ee5 GM |
3645 | } |
3646 | ||
3647 | /* Update the rest of the lines. */ | |
e87b8809 | 3648 | for (n_updated = 0; row < end && (force_p || !input_pending); ++row) |
b7412313 | 3649 | if (row->enabled_p) |
5f5c8ee5 GM |
3650 | { |
3651 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
3652 | int i; | |
177c0ea7 | 3653 | |
153a073c | 3654 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
3655 | detect_input_pending. If it's done too often, |
3656 | scrolling large windows with repeated scroll-up | |
3657 | commands will too quickly pause redisplay. */ | |
d012c62b KS |
3658 | #if PERIODIC_PREEMPTION_CHECKING |
3659 | if (!force_p) | |
3660 | { | |
3661 | EMACS_TIME tm, dif; | |
3662 | EMACS_GET_TIME (tm); | |
3663 | EMACS_SUB_TIME (dif, preemption_next_check, tm); | |
3664 | if (EMACS_TIME_NEG_P (dif)) | |
3665 | { | |
3666 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
3667 | if (detect_input_pending_ignore_squeezables ()) |
3668 | break; | |
d012c62b KS |
3669 | } |
3670 | } | |
3671 | #else | |
e87b8809 | 3672 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 3673 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3674 | #endif |
e876ff42 GM |
3675 | changed_p |= update_window_line (w, vpos, |
3676 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3677 | |
3678 | /* Mark all rows below the last visible one in the current | |
3679 | matrix as invalid. This is necessary because of | |
3680 | variable line heights. Consider the case of three | |
3681 | successive redisplays, where the first displays 5 | |
3682 | lines, the second 3 lines, and the third 5 lines again. | |
3683 | If the second redisplay wouldn't mark rows in the | |
3684 | current matrix invalid, the third redisplay might be | |
3685 | tempted to optimize redisplay based on lines displayed | |
3686 | in the first redisplay. */ | |
3687 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3688 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
3689 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
3690 | } | |
3691 | ||
3692 | /* Was display preempted? */ | |
3693 | paused_p = row < end; | |
177c0ea7 | 3694 | |
56974e03 | 3695 | set_cursor: |
177c0ea7 | 3696 | |
6b61353c KH |
3697 | /* Update the header line after scrolling because a new header |
3698 | line would otherwise overwrite lines at the top of the window | |
3699 | that can be scrolled. */ | |
3700 | if (header_line_row && header_line_row->enabled_p) | |
3701 | { | |
3702 | header_line_row->y = 0; | |
3703 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
6b61353c KH |
3704 | } |
3705 | ||
153a073c | 3706 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
3707 | if (!paused_p && !w->pseudo_window_p) |
3708 | { | |
93e023fc | 3709 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
3710 | if (changed_p && rif->fix_overlapping_area) |
3711 | { | |
3712 | redraw_overlapped_rows (w, yb); | |
3713 | redraw_overlapping_rows (w, yb); | |
3714 | } | |
93e023fc | 3715 | #endif |
177c0ea7 | 3716 | |
5f5c8ee5 GM |
3717 | /* Make cursor visible at cursor position of W. */ |
3718 | set_window_cursor_after_update (w); | |
3719 | ||
e876ff42 GM |
3720 | #if 0 /* Check that current matrix invariants are satisfied. This is |
3721 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
3722 | IF_DEBUG (check_matrix_invariants (w)); |
3723 | #endif | |
4588ec20 | 3724 | } |
5f5c8ee5 GM |
3725 | |
3726 | #if GLYPH_DEBUG | |
3727 | /* Remember the redisplay method used to display the matrix. */ | |
3728 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
3729 | #endif | |
408f5064 | 3730 | |
6b61353c KH |
3731 | #ifdef HAVE_WINDOW_SYSTEM |
3732 | update_window_fringes (w, 0); | |
3733 | #endif | |
3734 | ||
56974e03 GM |
3735 | /* End the update of window W. Don't set the cursor if we |
3736 | paused updating the display because in this case, | |
3737 | set_window_cursor_after_update hasn't been called, and | |
3738 | output_cursor doesn't contain the cursor location. */ | |
3739 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); | |
4588ec20 | 3740 | } |
5f5c8ee5 GM |
3741 | else |
3742 | paused_p = 1; | |
3743 | ||
2d5912c1 | 3744 | #if GLYPH_DEBUG |
0cffd9d8 | 3745 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
3746 | add_window_display_history (w, w->current_matrix->method, paused_p); |
3747 | #endif | |
177c0ea7 | 3748 | |
5f5c8ee5 | 3749 | clear_glyph_matrix (desired_matrix); |
408f5064 | 3750 | |
5f5c8ee5 | 3751 | return paused_p; |
4588ec20 JB |
3752 | } |
3753 | ||
b64b3980 | 3754 | |
5f5c8ee5 GM |
3755 | /* Update the display of area AREA in window W, row number VPOS. |
3756 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
3757 | ||
3758 | static void | |
971de7fb | 3759 | update_marginal_area (struct window *w, int area, int vpos) |
b64b3980 | 3760 | { |
5f5c8ee5 | 3761 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 3762 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
3763 | |
3764 | /* Let functions in xterm.c know what area subsequent X positions | |
3765 | will be relative to. */ | |
3766 | updated_area = area; | |
3767 | ||
3768 | /* Set cursor to start of glyphs, write them, and clear to the end | |
3769 | of the area. I don't think that something more sophisticated is | |
3770 | necessary here, since marginal areas will not be the default. */ | |
3771 | rif->cursor_to (vpos, 0, desired_row->y, 0); | |
3772 | if (desired_row->used[area]) | |
3773 | rif->write_glyphs (desired_row->glyphs[area], desired_row->used[area]); | |
3774 | rif->clear_end_of_line (-1); | |
b64b3980 | 3775 | } |
23b0200c | 3776 | |
352f1545 | 3777 | |
408f5064 GM |
3778 | /* Update the display of the text area of row VPOS in window W. |
3779 | Value is non-zero if display has changed. */ | |
5f5c8ee5 | 3780 | |
408f5064 | 3781 | static int |
971de7fb | 3782 | update_text_area (struct window *w, int vpos) |
23b0200c | 3783 | { |
5f5c8ee5 GM |
3784 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
3785 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3786 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 3787 | int changed_p = 0; |
5f5c8ee5 GM |
3788 | |
3789 | /* Let functions in xterm.c know what area subsequent X positions | |
3790 | will be relative to. */ | |
3791 | updated_area = TEXT_AREA; | |
177c0ea7 | 3792 | |
5f5c8ee5 GM |
3793 | /* If rows are at different X or Y, or rows have different height, |
3794 | or the current row is marked invalid, write the entire line. */ | |
3795 | if (!current_row->enabled_p | |
3796 | || desired_row->y != current_row->y | |
3797 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
3798 | || desired_row->phys_ascent != current_row->phys_ascent |
3799 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 3800 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 3801 | || current_row->overlapped_p |
fee8b690 CY |
3802 | /* This next line is necessary for correctly redrawing |
3803 | mouse-face areas after scrolling and other operations. | |
3804 | However, it causes excessive flickering when mouse is moved | |
3805 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
3806 | line doesn't seem to hurt anything. -- cyd. |
3807 | But it is still needed for the header line. -- kfs. */ | |
3808 | || (current_row->mouse_face_p | |
3809 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
3810 | || current_row->x != desired_row->x) |
3811 | { | |
3812 | rif->cursor_to (vpos, 0, desired_row->y, desired_row->x); | |
177c0ea7 | 3813 | |
5f5c8ee5 GM |
3814 | if (desired_row->used[TEXT_AREA]) |
3815 | rif->write_glyphs (desired_row->glyphs[TEXT_AREA], | |
3816 | desired_row->used[TEXT_AREA]); | |
177c0ea7 | 3817 | |
5f5c8ee5 GM |
3818 | /* Clear to end of window. */ |
3819 | rif->clear_end_of_line (-1); | |
408f5064 | 3820 | changed_p = 1; |
60f2f3f1 GM |
3821 | |
3822 | /* This erases the cursor. We do this here because | |
3823 | notice_overwritten_cursor cannot easily check this, which | |
3824 | might indicate that the whole functionality of | |
3825 | notice_overwritten_cursor would better be implemented here. | |
3826 | On the other hand, we need notice_overwritten_cursor as long | |
3827 | as mouse highlighting is done asynchronously outside of | |
3828 | redisplay. */ | |
3829 | if (vpos == w->phys_cursor.vpos) | |
3830 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
3831 | } |
3832 | else | |
3833 | { | |
3834 | int stop, i, x; | |
3835 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
3836 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
e47306e6 | 3837 | int overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 3838 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
91d227d9 | 3839 | int abort_skipping = 0; |
5f5c8ee5 | 3840 | |
78897758 YM |
3841 | /* If the desired row extends its face to the text area end, and |
3842 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
3843 | make sure we write at least one glyph, so that the face |
3844 | extension actually takes place. */ | |
78897758 YM |
3845 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
3846 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
3847 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
3848 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 3849 | --desired_stop_pos; |
177c0ea7 | 3850 | |
5f5c8ee5 GM |
3851 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
3852 | i = 0; | |
3853 | x = desired_row->x; | |
8399f8a0 GM |
3854 | |
3855 | /* Loop over glyphs that current and desired row may have | |
3856 | in common. */ | |
5f5c8ee5 | 3857 | while (i < stop) |
352f1545 | 3858 | { |
91d227d9 | 3859 | int can_skip_p = !abort_skipping; |
177c0ea7 | 3860 | |
5f5c8ee5 | 3861 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
3862 | don't have to be written. We can't skip if the last |
3863 | current glyph overlaps the glyph to its right. For | |
3864 | example, consider a current row of `if ' with the `f' in | |
3865 | Courier bold so that it overlaps the ` ' to its right. | |
3866 | If the desired row is ` ', we would skip over the space | |
3867 | after the `if' and there would remain a pixel from the | |
3868 | `f' on the screen. */ | |
3869 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 3870 | { |
e47306e6 GM |
3871 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
3872 | int left, right; | |
177c0ea7 | 3873 | |
e47306e6 GM |
3874 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
3875 | &left, &right); | |
91d227d9 | 3876 | can_skip_p = (right == 0 && !abort_skipping); |
352f1545 | 3877 | } |
177c0ea7 | 3878 | |
6d950f4c | 3879 | if (can_skip_p) |
352f1545 | 3880 | { |
91d227d9 CY |
3881 | int start_hpos = i; |
3882 | ||
6d950f4c GM |
3883 | while (i < stop |
3884 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
3885 | { | |
3886 | x += desired_glyph->pixel_width; | |
3887 | ++desired_glyph, ++current_glyph, ++i; | |
3888 | } | |
3889 | ||
3890 | /* Consider the case that the current row contains "xxx | |
3891 | ppp ggg" in italic Courier font, and the desired row | |
3892 | is "xxx ggg". The character `p' has lbearing, `g' | |
3893 | has not. The loop above will stop in front of the | |
3894 | first `p' in the current row. If we would start | |
3895 | writing glyphs there, we wouldn't erase the lbearing | |
3896 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 3897 | taken care of by draw_glyphs. */ |
6d950f4c GM |
3898 | if (overlapping_glyphs_p |
3899 | && i > 0 | |
3900 | && i < current_row->used[TEXT_AREA] | |
3901 | && (current_row->used[TEXT_AREA] | |
3902 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 3903 | { |
6d950f4c | 3904 | int left, right; |
177c0ea7 | 3905 | |
6d950f4c GM |
3906 | rif->get_glyph_overhangs (current_glyph, XFRAME (w->frame), |
3907 | &left, &right); | |
3908 | while (left > 0 && i > 0) | |
3909 | { | |
3910 | --i, --desired_glyph, --current_glyph; | |
3911 | x -= desired_glyph->pixel_width; | |
3912 | left -= desired_glyph->pixel_width; | |
3913 | } | |
91d227d9 CY |
3914 | |
3915 | /* Abort the skipping algorithm if we end up before | |
3916 | our starting point, to avoid looping (bug#1070). | |
3917 | This can happen when the lbearing is larger than | |
3918 | the pixel width. */ | |
3919 | abort_skipping = (i < start_hpos); | |
5f5c8ee5 | 3920 | } |
352f1545 | 3921 | } |
177c0ea7 | 3922 | |
5f5c8ee5 GM |
3923 | /* Try to avoid writing the entire rest of the desired row |
3924 | by looking for a resync point. This mainly prevents | |
3925 | mode line flickering in the case the mode line is in | |
3926 | fixed-pitch font, which it usually will be. */ | |
3927 | if (i < desired_row->used[TEXT_AREA]) | |
3928 | { | |
3929 | int start_x = x, start_hpos = i; | |
3930 | struct glyph *start = desired_glyph; | |
3931 | int current_x = x; | |
6d950f4c GM |
3932 | int skip_first_p = !can_skip_p; |
3933 | ||
5f5c8ee5 GM |
3934 | /* Find the next glyph that's equal again. */ |
3935 | while (i < stop | |
6d950f4c GM |
3936 | && (skip_first_p |
3937 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
3938 | && x == current_x) |
3939 | { | |
3940 | x += desired_glyph->pixel_width; | |
3941 | current_x += current_glyph->pixel_width; | |
3942 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 3943 | skip_first_p = 0; |
5f5c8ee5 | 3944 | } |
23b0200c | 3945 | |
5f5c8ee5 GM |
3946 | if (i == start_hpos || x != current_x) |
3947 | { | |
3948 | i = start_hpos; | |
3949 | x = start_x; | |
3950 | desired_glyph = start; | |
3951 | break; | |
3952 | } | |
e47306e6 | 3953 | |
5f5c8ee5 GM |
3954 | rif->cursor_to (vpos, start_hpos, desired_row->y, start_x); |
3955 | rif->write_glyphs (start, i - start_hpos); | |
408f5064 | 3956 | changed_p = 1; |
5f5c8ee5 GM |
3957 | } |
3958 | } | |
177c0ea7 | 3959 | |
5f5c8ee5 GM |
3960 | /* Write the rest. */ |
3961 | if (i < desired_row->used[TEXT_AREA]) | |
3962 | { | |
3963 | rif->cursor_to (vpos, i, desired_row->y, x); | |
3964 | rif->write_glyphs (desired_glyph, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 3965 | changed_p = 1; |
5f5c8ee5 | 3966 | } |
177c0ea7 | 3967 | |
5f5c8ee5 GM |
3968 | /* Maybe clear to end of line. */ |
3969 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
3970 | { | |
3971 | /* If new row extends to the end of the text area, nothing | |
3972 | has to be cleared, if and only if we did a write_glyphs | |
3973 | above. This is made sure by setting desired_stop_pos | |
3974 | appropriately above. */ | |
78897758 YM |
3975 | xassert (i < desired_row->used[TEXT_AREA] |
3976 | || ((desired_row->used[TEXT_AREA] | |
3977 | == current_row->used[TEXT_AREA]) | |
3978 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
3979 | } |
3980 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
3981 | { | |
3982 | /* If old row extends to the end of the text area, clear. */ | |
3983 | if (i >= desired_row->used[TEXT_AREA]) | |
3984 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3985 | desired_row->pixel_width); |
5f5c8ee5 | 3986 | rif->clear_end_of_line (-1); |
408f5064 | 3987 | changed_p = 1; |
5f5c8ee5 GM |
3988 | } |
3989 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 3990 | { |
5f5c8ee5 GM |
3991 | /* Otherwise clear to the end of the old row. Everything |
3992 | after that position should be clear already. */ | |
3993 | int x; | |
177c0ea7 | 3994 | |
5f5c8ee5 GM |
3995 | if (i >= desired_row->used[TEXT_AREA]) |
3996 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3997 | desired_row->pixel_width); |
5f5c8ee5 GM |
3998 | |
3999 | /* If cursor is displayed at the end of the line, make sure | |
4000 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
4001 | with which to erase the cursor (because this method | |
4002 | doesn't work with lbearing/rbearing), so we must do it | |
4003 | this way. */ | |
4004 | if (vpos == w->phys_cursor.vpos | |
f951a506 EZ |
4005 | && (desired_row->reversed_p |
4006 | ? (w->phys_cursor.hpos < 0) | |
4007 | : (w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]))) | |
5f5c8ee5 GM |
4008 | { |
4009 | w->phys_cursor_on_p = 0; | |
4010 | x = -1; | |
4011 | } | |
4012 | else | |
6b61353c | 4013 | x = current_row->pixel_width; |
5f5c8ee5 | 4014 | rif->clear_end_of_line (x); |
408f5064 | 4015 | changed_p = 1; |
2e8907d3 | 4016 | } |
23b0200c | 4017 | } |
408f5064 GM |
4018 | |
4019 | return changed_p; | |
23b0200c | 4020 | } |
4588ec20 | 4021 | |
5f5c8ee5 | 4022 | |
408f5064 GM |
4023 | /* Update row VPOS in window W. Value is non-zero if display has been |
4024 | changed. */ | |
5f5c8ee5 | 4025 | |
408f5064 | 4026 | static int |
971de7fb | 4027 | update_window_line (struct window *w, int vpos, int *mouse_face_overwritten_p) |
5f5c8ee5 GM |
4028 | { |
4029 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
4030 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 4031 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 4032 | int changed_p = 0; |
5f5c8ee5 | 4033 | |
5f5c8ee5 GM |
4034 | /* Set the row being updated. This is important to let xterm.c |
4035 | know what line height values are in effect. */ | |
4036 | updated_row = desired_row; | |
4037 | ||
177c0ea7 JB |
4038 | /* A row can be completely invisible in case a desired matrix was |
4039 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
4040 | the matrix. Make sure to make such rows current anyway, since |
4041 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
4042 | if (desired_row->mode_line_p |
4043 | || desired_row->visible_height > 0) | |
408f5064 | 4044 | { |
504805ac GM |
4045 | xassert (desired_row->enabled_p); |
4046 | ||
4047 | /* Update display of the left margin area, if there is one. */ | |
4048 | if (!desired_row->full_width_p | |
7df02016 | 4049 | && !NILP (w->left_margin_cols)) |
504805ac GM |
4050 | { |
4051 | changed_p = 1; | |
4052 | update_marginal_area (w, LEFT_MARGIN_AREA, vpos); | |
4053 | } | |
177c0ea7 | 4054 | |
504805ac GM |
4055 | /* Update the display of the text area. */ |
4056 | if (update_text_area (w, vpos)) | |
4057 | { | |
4058 | changed_p = 1; | |
4059 | if (current_row->mouse_face_p) | |
4060 | *mouse_face_overwritten_p = 1; | |
4061 | } | |
177c0ea7 | 4062 | |
504805ac GM |
4063 | /* Update display of the right margin area, if there is one. */ |
4064 | if (!desired_row->full_width_p | |
7df02016 | 4065 | && !NILP (w->right_margin_cols)) |
504805ac GM |
4066 | { |
4067 | changed_p = 1; | |
4068 | update_marginal_area (w, RIGHT_MARGIN_AREA, vpos); | |
4069 | } | |
177c0ea7 | 4070 | |
504805ac GM |
4071 | /* Draw truncation marks etc. */ |
4072 | if (!current_row->enabled_p | |
4073 | || desired_row->y != current_row->y | |
4074 | || desired_row->visible_height != current_row->visible_height | |
6b61353c | 4075 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 4076 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
6b61353c | 4077 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 4078 | || desired_row->mode_line_p != current_row->mode_line_p |
6b61353c | 4079 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
4080 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
4081 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
4082 | rif->after_update_window_line_hook (desired_row); | |
408f5064 | 4083 | } |
177c0ea7 | 4084 | |
5f5c8ee5 GM |
4085 | /* Update current_row from desired_row. */ |
4086 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
4087 | updated_row = NULL; | |
408f5064 | 4088 | return changed_p; |
5f5c8ee5 GM |
4089 | } |
4090 | ||
4091 | ||
4092 | /* Set the cursor after an update of window W. This function may only | |
4093 | be called from update_window. */ | |
4094 | ||
4095 | static void | |
971de7fb | 4096 | set_window_cursor_after_update (struct window *w) |
4588ec20 | 4097 | { |
5f5c8ee5 | 4098 | struct frame *f = XFRAME (w->frame); |
fa971ac3 | 4099 | struct redisplay_interface *rif = FRAME_RIF (f); |
5f5c8ee5 GM |
4100 | int cx, cy, vpos, hpos; |
4101 | ||
4102 | /* Not intended for frame matrix updates. */ | |
4103 | xassert (FRAME_WINDOW_P (f)); | |
177c0ea7 | 4104 | |
b96fd3e8 GM |
4105 | if (cursor_in_echo_area |
4106 | && !NILP (echo_area_buffer[0]) | |
4107 | /* If we are showing a message instead of the mini-buffer, | |
4108 | show the cursor for the message instead. */ | |
4109 | && XWINDOW (minibuf_window) == w | |
4110 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
4111 | /* These cases apply only to the frame that contains |
4112 | the active mini-buffer window. */ | |
4113 | && FRAME_HAS_MINIBUF_P (f) | |
4114 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
4115 | { | |
4116 | cx = cy = vpos = hpos = 0; | |
4117 | ||
4118 | if (cursor_in_echo_area >= 0) | |
4119 | { | |
4120 | /* If the mini-buffer is several lines high, find the last | |
4121 | line that has any text on it. Note: either all lines | |
4122 | are enabled or none. Otherwise we wouldn't be able to | |
4123 | determine Y. */ | |
862b4790 GM |
4124 | struct glyph_row *row, *last_row; |
4125 | struct glyph *glyph; | |
4126 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 4127 | |
862b4790 | 4128 | last_row = NULL; |
6206f8ce GM |
4129 | row = w->current_matrix->rows; |
4130 | while (row->enabled_p | |
4131 | && (last_row == NULL | |
4132 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 4133 | { |
862b4790 GM |
4134 | if (row->used[TEXT_AREA] |
4135 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
4136 | last_row = row; | |
6206f8ce | 4137 | ++row; |
862b4790 | 4138 | } |
177c0ea7 | 4139 | |
5f5c8ee5 GM |
4140 | if (last_row) |
4141 | { | |
6206f8ce GM |
4142 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
4143 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 4144 | |
b96fd3e8 | 4145 | while (last > start && last->charpos < 0) |
862b4790 | 4146 | --last; |
177c0ea7 | 4147 | |
862b4790 GM |
4148 | for (glyph = start; glyph < last; ++glyph) |
4149 | { | |
4150 | cx += glyph->pixel_width; | |
4151 | ++hpos; | |
4152 | } | |
4153 | ||
5f5c8ee5 | 4154 | cy = last_row->y; |
862b4790 | 4155 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
4156 | } |
4157 | } | |
4158 | } | |
4159 | else | |
4160 | { | |
4161 | cx = w->cursor.x; | |
4162 | cy = w->cursor.y; | |
4163 | hpos = w->cursor.hpos; | |
4164 | vpos = w->cursor.vpos; | |
4165 | } | |
4588ec20 | 4166 | |
5f5c8ee5 | 4167 | /* Window cursor can be out of sync for horizontally split windows. */ |
f951a506 | 4168 | hpos = max (-1, hpos); /* -1 is for when cursor is on the left fringe */ |
5f5c8ee5 GM |
4169 | hpos = min (w->current_matrix->matrix_w - 1, hpos); |
4170 | vpos = max (0, vpos); | |
4171 | vpos = min (w->current_matrix->nrows - 1, vpos); | |
4172 | rif->cursor_to (vpos, hpos, cy, cx); | |
4588ec20 | 4173 | } |
4588ec20 | 4174 | |
5f5c8ee5 | 4175 | |
6df5d75f GM |
4176 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window |
4177 | tree rooted at W. */ | |
4178 | ||
4179 | void | |
971de7fb | 4180 | set_window_update_flags (struct window *w, int on_p) |
6df5d75f GM |
4181 | { |
4182 | while (w) | |
4183 | { | |
4184 | if (!NILP (w->hchild)) | |
4185 | set_window_update_flags (XWINDOW (w->hchild), on_p); | |
4186 | else if (!NILP (w->vchild)) | |
4187 | set_window_update_flags (XWINDOW (w->vchild), on_p); | |
4188 | else | |
4189 | w->must_be_updated_p = on_p; | |
4190 | ||
4191 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
4192 | } | |
177c0ea7 | 4193 | } |
6df5d75f GM |
4194 | |
4195 | ||
4196 | \f | |
4197 | /*********************************************************************** | |
4198 | Window-Based Scrolling | |
4199 | ***********************************************************************/ | |
4200 | ||
4201 | /* Structure describing rows in scrolling_window. */ | |
4202 | ||
4203 | struct row_entry | |
4204 | { | |
4205 | /* Number of occurrences of this row in desired and current matrix. */ | |
4206 | int old_uses, new_uses; | |
177c0ea7 | 4207 | |
6df5d75f GM |
4208 | /* Vpos of row in new matrix. */ |
4209 | int new_line_number; | |
4210 | ||
4211 | /* Bucket index of this row_entry in the hash table row_table. */ | |
4212 | int bucket; | |
177c0ea7 | 4213 | |
6df5d75f GM |
4214 | /* The row described by this entry. */ |
4215 | struct glyph_row *row; | |
177c0ea7 | 4216 | |
6df5d75f GM |
4217 | /* Hash collision chain. */ |
4218 | struct row_entry *next; | |
4219 | }; | |
4220 | ||
4221 | /* A pool to allocate row_entry structures from, and the size of the | |
4222 | pool. The pool is reallocated in scrolling_window when we find | |
4223 | that we need a larger one. */ | |
4224 | ||
4225 | static struct row_entry *row_entry_pool; | |
4226 | static int row_entry_pool_size; | |
4227 | ||
4228 | /* Index of next free entry in row_entry_pool. */ | |
4229 | ||
4230 | static int row_entry_idx; | |
4231 | ||
4232 | /* The hash table used during scrolling, and the table's size. This | |
4233 | table is used to quickly identify equal rows in the desired and | |
4234 | current matrix. */ | |
4235 | ||
4236 | static struct row_entry **row_table; | |
4237 | static int row_table_size; | |
4238 | ||
4239 | /* Vectors of pointers to row_entry structures belonging to the | |
4240 | current and desired matrix, and the size of the vectors. */ | |
4241 | ||
4242 | static struct row_entry **old_lines, **new_lines; | |
4243 | static int old_lines_size, new_lines_size; | |
4244 | ||
4245 | /* A pool to allocate run structures from, and its size. */ | |
4246 | ||
4247 | static struct run *run_pool; | |
4248 | static int runs_size; | |
4249 | ||
4250 | /* A vector of runs of lines found during scrolling. */ | |
4251 | ||
4252 | static struct run **runs; | |
4253 | ||
6df5d75f GM |
4254 | /* Add glyph row ROW to the scrolling hash table during the scrolling |
4255 | of window W. */ | |
4256 | ||
4257 | static INLINE struct row_entry * | |
971de7fb | 4258 | add_row_entry (struct window *w, struct glyph_row *row) |
6df5d75f GM |
4259 | { |
4260 | struct row_entry *entry; | |
4261 | int i = row->hash % row_table_size; | |
177c0ea7 | 4262 | |
6df5d75f | 4263 | entry = row_table[i]; |
e4e0bee9 | 4264 | while (entry && !row_equal_p (w, entry->row, row, 1)) |
6df5d75f | 4265 | entry = entry->next; |
177c0ea7 | 4266 | |
6df5d75f GM |
4267 | if (entry == NULL) |
4268 | { | |
4269 | entry = row_entry_pool + row_entry_idx++; | |
4270 | entry->row = row; | |
4271 | entry->old_uses = entry->new_uses = 0; | |
4272 | entry->new_line_number = 0; | |
4273 | entry->bucket = i; | |
4274 | entry->next = row_table[i]; | |
4275 | row_table[i] = entry; | |
4276 | } | |
4277 | ||
4278 | return entry; | |
4279 | } | |
4280 | ||
4281 | ||
5f5c8ee5 | 4282 | /* Try to reuse part of the current display of W by scrolling lines. |
153a073c | 4283 | HEADER_LINE_P non-zero means W has a header line. |
5f5c8ee5 GM |
4284 | |
4285 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4286 | Technique for Isolating Differences Between Files." It should take | |
4287 | O(N) time. | |
4288 | ||
4289 | A short outline of the steps of the algorithm | |
4290 | ||
4291 | 1. Skip lines equal at the start and end of both matrices. | |
4292 | ||
4293 | 2. Enter rows in the current and desired matrix into a symbol | |
4294 | table, counting how often they appear in both matrices. | |
4295 | ||
4296 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4297 | i.e. we assume that such lines are likely to have been moved. | |
4298 | ||
4299 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4300 | forward and backward. | |
4301 | ||
4302 | Value is | |
4303 | ||
4304 | -1 if all rows were found to be equal. | |
4305 | 0 to indicate that we did not scroll the display, or | |
4306 | 1 if we did scroll. */ | |
4307 | ||
4308 | static int | |
971de7fb | 4309 | scrolling_window (struct window *w, int header_line_p) |
4588ec20 | 4310 | { |
5f5c8ee5 GM |
4311 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4312 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4313 | int yb = window_text_bottom_y (w); | |
6df5d75f GM |
4314 | int i, j, first_old, first_new, last_old, last_new; |
4315 | int nruns, nbytes, n, run_idx; | |
4316 | struct row_entry *entry; | |
fa971ac3 | 4317 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4318 | |
4319 | /* Skip over rows equal at the start. */ | |
bfdcafe1 | 4320 | for (i = header_line_p ? 1 : 0; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4321 | { |
bfdcafe1 GM |
4322 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4323 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4324 | ||
4325 | if (c->enabled_p | |
4326 | && d->enabled_p | |
6b61353c | 4327 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4328 | && c->y == d->y |
4329 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4330 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
4331 | && row_equal_p (w, c, d, 1)) | |
4332 | { | |
4333 | assign_row (c, d); | |
4334 | d->enabled_p = 0; | |
4335 | } | |
4336 | else | |
4337 | break; | |
5f5c8ee5 | 4338 | } |
4588ec20 | 4339 | |
5f5c8ee5 GM |
4340 | /* Give up if some rows in the desired matrix are not enabled. */ |
4341 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4342 | return -1; | |
177c0ea7 | 4343 | |
5f5c8ee5 GM |
4344 | first_old = first_new = i; |
4345 | ||
4346 | /* Set last_new to the index + 1 of the last enabled row in the | |
4347 | desired matrix. */ | |
4348 | i = first_new + 1; | |
4349 | while (i < desired_matrix->nrows - 1 | |
4350 | && MATRIX_ROW (desired_matrix, i)->enabled_p | |
6df5d75f | 4351 | && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)) <= yb) |
5f5c8ee5 GM |
4352 | ++i; |
4353 | ||
4354 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4355 | return 0; | |
4356 | ||
4357 | last_new = i; | |
4358 | ||
4359 | /* Set last_old to the index + 1 of the last enabled row in the | |
4360 | current matrix. We don't look at the enabled flag here because | |
4361 | we plan to reuse part of the display even if other parts are | |
4362 | disabled. */ | |
4363 | i = first_old + 1; | |
93962bfa GM |
4364 | while (i < current_matrix->nrows - 1) |
4365 | { | |
4366 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4367 | if (bottom <= yb) | |
4368 | ++i; | |
4369 | if (bottom >= yb) | |
4370 | break; | |
4371 | } | |
4372 | ||
5f5c8ee5 GM |
4373 | last_old = i; |
4374 | ||
4375 | /* Skip over rows equal at the bottom. */ | |
4376 | i = last_new; | |
4377 | j = last_old; | |
4378 | while (i - 1 > first_new | |
4379 | && j - 1 > first_old | |
4380 | && MATRIX_ROW (current_matrix, i - 1)->enabled_p | |
4381 | && (MATRIX_ROW (current_matrix, i - 1)->y | |
4382 | == MATRIX_ROW (desired_matrix, j - 1)->y) | |
6b61353c | 4383 | && !MATRIX_ROW (desired_matrix, j - 1)->redraw_fringe_bitmaps_p |
5f5c8ee5 GM |
4384 | && row_equal_p (w, |
4385 | MATRIX_ROW (desired_matrix, i - 1), | |
e4e0bee9 | 4386 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
4387 | --i, --j; |
4388 | last_new = i; | |
4389 | last_old = j; | |
4390 | ||
4391 | /* Nothing to do if all rows are equal. */ | |
4392 | if (last_new == first_new) | |
4393 | return 0; | |
4394 | ||
6df5d75f | 4395 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 4396 | |
6df5d75f GM |
4397 | if (current_matrix->nrows > old_lines_size) |
4398 | { | |
4399 | old_lines_size = current_matrix->nrows; | |
4400 | nbytes = old_lines_size * sizeof *old_lines; | |
4401 | old_lines = (struct row_entry **) xrealloc (old_lines, nbytes); | |
4402 | } | |
177c0ea7 | 4403 | |
6df5d75f GM |
4404 | if (desired_matrix->nrows > new_lines_size) |
4405 | { | |
4406 | new_lines_size = desired_matrix->nrows; | |
4407 | nbytes = new_lines_size * sizeof *new_lines; | |
4408 | new_lines = (struct row_entry **) xrealloc (new_lines, nbytes); | |
4409 | } | |
4410 | ||
4411 | n = desired_matrix->nrows + current_matrix->nrows; | |
4412 | if (3 * n > row_table_size) | |
4413 | { | |
4414 | row_table_size = next_almost_prime (3 * n); | |
4415 | nbytes = row_table_size * sizeof *row_table; | |
4416 | row_table = (struct row_entry **) xrealloc (row_table, nbytes); | |
72af86bd | 4417 | memset (row_table, 0, nbytes); |
6df5d75f GM |
4418 | } |
4419 | ||
4420 | if (n > row_entry_pool_size) | |
4421 | { | |
4422 | row_entry_pool_size = n; | |
4423 | nbytes = row_entry_pool_size * sizeof *row_entry_pool; | |
4424 | row_entry_pool = (struct row_entry *) xrealloc (row_entry_pool, nbytes); | |
4425 | } | |
4426 | ||
4427 | if (desired_matrix->nrows > runs_size) | |
4428 | { | |
4429 | runs_size = desired_matrix->nrows; | |
4430 | nbytes = runs_size * sizeof *runs; | |
4431 | runs = (struct run **) xrealloc (runs, nbytes); | |
4432 | nbytes = runs_size * sizeof *run_pool; | |
4433 | run_pool = (struct run *) xrealloc (run_pool, nbytes); | |
4434 | } | |
4435 | ||
4436 | nruns = run_idx = 0; | |
4437 | row_entry_idx = 0; | |
4438 | ||
4439 | /* Add rows from the current and desired matrix to the hash table | |
4440 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 4441 | |
5f5c8ee5 GM |
4442 | for (i = first_old; i < last_old; ++i) |
4443 | { | |
4444 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
4445 | { | |
6df5d75f GM |
4446 | entry = add_row_entry (w, MATRIX_ROW (current_matrix, i)); |
4447 | old_lines[i] = entry; | |
4448 | ++entry->old_uses; | |
5f5c8ee5 GM |
4449 | } |
4450 | else | |
6df5d75f | 4451 | old_lines[i] = NULL; |
5f5c8ee5 GM |
4452 | } |
4453 | ||
5f5c8ee5 GM |
4454 | for (i = first_new; i < last_new; ++i) |
4455 | { | |
4456 | xassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); | |
6df5d75f GM |
4457 | entry = add_row_entry (w, MATRIX_ROW (desired_matrix, i)); |
4458 | ++entry->new_uses; | |
4459 | entry->new_line_number = i; | |
4460 | new_lines[i] = entry; | |
5f5c8ee5 | 4461 | } |
4588ec20 | 4462 | |
5f5c8ee5 GM |
4463 | /* Identify moves based on lines that are unique and equal |
4464 | in both matrices. */ | |
4465 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
4466 | if (old_lines[i] |
4467 | && old_lines[i]->old_uses == 1 | |
4468 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 GM |
4469 | { |
4470 | int j, k; | |
6df5d75f GM |
4471 | int new_line = old_lines[i]->new_line_number; |
4472 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
4473 | |
4474 | /* Record move. */ | |
4475 | run->current_vpos = i; | |
4476 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
4477 | run->desired_vpos = new_line; | |
4478 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
4479 | run->nrows = 1; | |
4480 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
4481 | ||
4482 | /* Extend backward. */ | |
4483 | j = i - 1; | |
4484 | k = new_line - 1; | |
4485 | while (j > first_old | |
4486 | && k > first_new | |
6df5d75f | 4487 | && old_lines[j] == new_lines[k]) |
5f5c8ee5 GM |
4488 | { |
4489 | int h = MATRIX_ROW (current_matrix, j)->height; | |
177c0ea7 JB |
4490 | --run->current_vpos; |
4491 | --run->desired_vpos; | |
5f5c8ee5 GM |
4492 | ++run->nrows; |
4493 | run->height += h; | |
4494 | run->desired_y -= h; | |
4495 | run->current_y -= h; | |
4496 | --j, --k; | |
4497 | } | |
4588ec20 | 4498 | |
5f5c8ee5 GM |
4499 | /* Extend forward. */ |
4500 | j = i + 1; | |
4501 | k = new_line + 1; | |
4502 | while (j < last_old | |
4503 | && k < last_new | |
6df5d75f | 4504 | && old_lines[j] == new_lines[k]) |
5f5c8ee5 GM |
4505 | { |
4506 | int h = MATRIX_ROW (current_matrix, j)->height; | |
177c0ea7 | 4507 | ++run->nrows; |
5f5c8ee5 GM |
4508 | run->height += h; |
4509 | ++j, ++k; | |
4510 | } | |
19dff8dc | 4511 | |
5f5c8ee5 GM |
4512 | /* Insert run into list of all runs. Order runs by copied |
4513 | pixel lines. Note that we record runs that don't have to | |
4514 | be copied because they are already in place. This is done | |
4515 | because we can avoid calling update_window_line in this | |
4516 | case. */ | |
4517 | for (j = 0; j < nruns && runs[j]->height > run->height; ++j) | |
4518 | ; | |
2b4ec4d7 | 4519 | for (k = nruns; k > j; --k) |
5f5c8ee5 GM |
4520 | runs[k] = runs[k - 1]; |
4521 | runs[j] = run; | |
4522 | ++nruns; | |
4523 | ||
4524 | i += run->nrows; | |
4525 | } | |
4526 | else | |
4527 | ++i; | |
4588ec20 | 4528 | |
5f5c8ee5 GM |
4529 | /* Do the moves. Do it in a way that we don't overwrite something |
4530 | we want to copy later on. This is not solvable in general | |
4531 | because there is only one display and we don't have a way to | |
4532 | exchange areas on this display. Example: | |
4588ec20 | 4533 | |
5f5c8ee5 GM |
4534 | +-----------+ +-----------+ |
4535 | | A | | B | | |
4536 | +-----------+ --> +-----------+ | |
4537 | | B | | A | | |
4538 | +-----------+ +-----------+ | |
4588ec20 | 4539 | |
5f5c8ee5 GM |
4540 | Instead, prefer bigger moves, and invalidate moves that would |
4541 | copy from where we copied to. */ | |
ea0d86af | 4542 | |
5f5c8ee5 GM |
4543 | for (i = 0; i < nruns; ++i) |
4544 | if (runs[i]->nrows > 0) | |
4545 | { | |
4546 | struct run *r = runs[i]; | |
24e86043 | 4547 | |
5f5c8ee5 GM |
4548 | /* Copy on the display. */ |
4549 | if (r->current_y != r->desired_y) | |
4550 | { | |
4551 | rif->scroll_run_hook (w, r); | |
4552 | ||
4553 | /* Invalidate runs that copy from where we copied to. */ | |
4554 | for (j = i + 1; j < nruns; ++j) | |
4555 | { | |
4556 | struct run *p = runs[j]; | |
177c0ea7 | 4557 | |
5f5c8ee5 GM |
4558 | if ((p->current_y >= r->desired_y |
4559 | && p->current_y < r->desired_y + r->height) | |
4560 | || (p->current_y + p->height >= r->desired_y | |
4561 | && (p->current_y + p->height | |
4562 | < r->desired_y + r->height))) | |
4563 | p->nrows = 0; | |
4564 | } | |
4565 | } | |
ea0d86af | 4566 | |
5f5c8ee5 GM |
4567 | /* Assign matrix rows. */ |
4568 | for (j = 0; j < r->nrows; ++j) | |
4569 | { | |
4570 | struct glyph_row *from, *to; | |
408f5064 | 4571 | int to_overlapped_p; |
e876ff42 | 4572 | |
5f5c8ee5 GM |
4573 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
4574 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 4575 | to_overlapped_p = to->overlapped_p; |
6b61353c KH |
4576 | if (!from->mode_line_p && !w->pseudo_window_p |
4577 | && (to->left_fringe_bitmap != from->left_fringe_bitmap | |
4578 | || to->right_fringe_bitmap != from->right_fringe_bitmap | |
4579 | || to->left_fringe_face_id != from->left_fringe_face_id | |
4580 | || to->right_fringe_face_id != from->right_fringe_face_id | |
3d4a365f | 4581 | || to->overlay_arrow_bitmap != from->overlay_arrow_bitmap)) |
6b61353c | 4582 | from->redraw_fringe_bitmaps_p = 1; |
5f5c8ee5 GM |
4583 | assign_row (to, from); |
4584 | to->enabled_p = 1, from->enabled_p = 0; | |
408f5064 | 4585 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
4586 | } |
4587 | } | |
15874c59 | 4588 | |
6df5d75f GM |
4589 | /* Clear the hash table, for the next time. */ |
4590 | for (i = 0; i < row_entry_idx; ++i) | |
4591 | row_table[row_entry_pool[i].bucket] = NULL; | |
4592 | ||
6b61353c KH |
4593 | /* Value is > 0 to indicate that we scrolled the display. */ |
4594 | return nruns; | |
5f5c8ee5 | 4595 | } |
de83c314 | 4596 | |
15874c59 | 4597 | |
4588ec20 | 4598 | \f |
5f5c8ee5 GM |
4599 | /************************************************************************ |
4600 | Frame-Based Updates | |
4601 | ************************************************************************/ | |
4588ec20 | 4602 | |
5f5c8ee5 | 4603 | /* Update the desired frame matrix of frame F. |
4588ec20 | 4604 | |
5f5c8ee5 GM |
4605 | FORCE_P non-zero means that the update should not be stopped by |
4606 | pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling | |
4607 | should not be tried. | |
4608 | ||
4609 | Value is non-zero if update was stopped due to pending input. */ | |
4610 | ||
4611 | static int | |
971de7fb | 4612 | update_frame_1 (struct frame *f, int force_p, int inhibit_id_p) |
4588ec20 | 4613 | { |
5f5c8ee5 GM |
4614 | /* Frame matrices to work on. */ |
4615 | struct glyph_matrix *current_matrix = f->current_matrix; | |
4616 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
4617 | int i; | |
4588ec20 JB |
4618 | int pause; |
4619 | int preempt_count = baud_rate / 2400 + 1; | |
5f5c8ee5 GM |
4620 | |
4621 | xassert (current_matrix && desired_matrix); | |
4588ec20 | 4622 | |
c37e4889 RS |
4623 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
4624 | calculate_costs (f); | |
4625 | ||
d88c2b9e RS |
4626 | if (preempt_count <= 0) |
4627 | preempt_count = 1; | |
4628 | ||
a2130dbb KS |
4629 | #if !PERIODIC_PREEMPTION_CHECKING |
4630 | if (!force_p && detect_input_pending_ignore_squeezables ()) | |
4588ec20 JB |
4631 | { |
4632 | pause = 1; | |
4633 | goto do_pause; | |
4634 | } | |
d012c62b | 4635 | #endif |
4588ec20 | 4636 | |
5f5c8ee5 | 4637 | /* If we cannot insert/delete lines, it's no use trying it. */ |
daf01701 | 4638 | if (!FRAME_LINE_INS_DEL_OK (f)) |
5f5c8ee5 | 4639 | inhibit_id_p = 1; |
7098a0fa | 4640 | |
efb859b4 | 4641 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
4642 | i/d line if just want cursor motion. */ |
4643 | for (i = 0; i < desired_matrix->nrows; i++) | |
4644 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
4645 | break; |
4646 | ||
4647 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
4648 | if (!inhibit_id_p && i < desired_matrix->nrows) |
4649 | force_p |= scrolling (f); | |
4588ec20 JB |
4650 | |
4651 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
4652 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
4653 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 4654 | |
5f5c8ee5 GM |
4655 | /* Now update the rest of the lines. */ |
4656 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 4657 | { |
5f5c8ee5 | 4658 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 4659 | { |
b6a65ac2 | 4660 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
4661 | { |
4662 | /* Flush out every so many lines. | |
4663 | Also flush out if likely to have more than 1k buffered | |
4664 | otherwise. I'm told that some telnet connections get | |
4665 | really screwed by more than 1k output at once. */ | |
fced92f1 CY |
4666 | FILE *display_output = FRAME_TTY (f)->output; |
4667 | if (display_output) | |
4588ec20 | 4668 | { |
fced92f1 CY |
4669 | int outq = PENDING_OUTPUT_COUNT (display_output); |
4670 | if (outq > 900 | |
4671 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
4588ec20 | 4672 | { |
fced92f1 CY |
4673 | fflush (display_output); |
4674 | if (preempt_count == 1) | |
4675 | { | |
a41f8bed | 4676 | #ifdef EMACS_OUTQSIZE |
fced92f1 CY |
4677 | if (EMACS_OUTQSIZE (0, &outq) < 0) |
4678 | /* Probably not a tty. Ignore the error and reset | |
4679 | the outq count. */ | |
4680 | outq = PENDING_OUTPUT_COUNT (FRAME_TTY (f->output)); | |
4588ec20 | 4681 | #endif |
fced92f1 CY |
4682 | outq *= 10; |
4683 | if (baud_rate <= outq && baud_rate > 0) | |
4684 | sleep (outq / baud_rate); | |
4685 | } | |
4588ec20 JB |
4686 | } |
4687 | } | |
4588ec20 JB |
4688 | } |
4689 | ||
d012c62b KS |
4690 | #if PERIODIC_PREEMPTION_CHECKING |
4691 | if (!force_p) | |
4692 | { | |
4693 | EMACS_TIME tm, dif; | |
4694 | EMACS_GET_TIME (tm); | |
4695 | EMACS_SUB_TIME (dif, preemption_next_check, tm); | |
4696 | if (EMACS_TIME_NEG_P (dif)) | |
4697 | { | |
4698 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
4699 | if (detect_input_pending_ignore_squeezables ()) |
4700 | break; | |
d012c62b KS |
4701 | } |
4702 | } | |
4703 | #else | |
4704 | if (!force_p && (i - 1) % preempt_count == 0) | |
a2d5fca0 | 4705 | detect_input_pending_ignore_squeezables (); |
d012c62b | 4706 | #endif |
a2960116 | 4707 | |
5f5c8ee5 | 4708 | update_frame_line (f, i); |
4588ec20 | 4709 | } |
4588ec20 | 4710 | } |
177c0ea7 | 4711 | |
7df02016 | 4712 | pause = (i < FRAME_LINES (f) - 1) ? i : 0; |
4588ec20 JB |
4713 | |
4714 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
4715 | if (!pause) | |
4716 | { | |
48cf7030 | 4717 | if ((cursor_in_echo_area |
5f5c8ee5 | 4718 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 4719 | show the cursor for the message instead of for the |
5f5c8ee5 | 4720 | (now hidden) mini-buffer contents. */ |
2577053b RS |
4721 | || (EQ (minibuf_window, selected_window) |
4722 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 4723 | && !NILP (echo_area_buffer[0]))) |
2577053b | 4724 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 4725 | the active mini-buffer window. */ |
2577053b | 4726 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 4727 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 4728 | { |
7df02016 | 4729 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
4730 | int row, col; |
4731 | ||
4732 | if (cursor_in_echo_area < 0) | |
4733 | { | |
5f5c8ee5 GM |
4734 | /* Negative value of cursor_in_echo_area means put |
4735 | cursor at beginning of line. */ | |
648fa17d JB |
4736 | row = top; |
4737 | col = 0; | |
4738 | } | |
1113d9db | 4739 | else |
648fa17d | 4740 | { |
5f5c8ee5 GM |
4741 | /* Positive value of cursor_in_echo_area means put |
4742 | cursor at the end of the prompt. If the mini-buffer | |
4743 | is several lines high, find the last line that has | |
4744 | any text on it. */ | |
7df02016 | 4745 | row = FRAME_LINES (f); |
177c0ea7 | 4746 | do |
648fa17d | 4747 | { |
5f5c8ee5 GM |
4748 | --row; |
4749 | col = 0; | |
177c0ea7 | 4750 | |
5f5c8ee5 GM |
4751 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
4752 | { | |
4753 | /* Frame rows are filled up with spaces that | |
4754 | must be ignored here. */ | |
5f5c8ee5 GM |
4755 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
4756 | row); | |
4757 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
4758 | struct glyph *last = start + r->used[TEXT_AREA]; | |
4759 | ||
4760 | while (last > start | |
4761 | && (last - 1)->charpos < 0) | |
4762 | --last; | |
177c0ea7 | 4763 | |
5f5c8ee5 GM |
4764 | col = last - start; |
4765 | } | |
648fa17d JB |
4766 | } |
4767 | while (row > top && col == 0); | |
4768 | ||
6395da5c | 4769 | /* Make sure COL is not out of range. */ |
868e640e | 4770 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 4771 | { |
6395da5c | 4772 | /* If we have another row, advance cursor into it. */ |
7df02016 | 4773 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 4774 | { |
7df02016 | 4775 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
4776 | row++; |
4777 | } | |
4778 | /* Otherwise move it back in range. */ | |
4779 | else | |
868e640e | 4780 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
4781 | } |
4782 | } | |
4783 | ||
385ed61f | 4784 | cursor_to (f, row, col); |
1113d9db | 4785 | } |
4588ec20 | 4786 | else |
5f5c8ee5 GM |
4787 | { |
4788 | /* We have only one cursor on terminal frames. Use it to | |
4789 | display the cursor of the selected window. */ | |
4790 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
4791 | if (w->cursor.vpos >= 0 |
4792 | /* The cursor vpos may be temporarily out of bounds | |
4793 | in the following situation: There is one window, | |
4794 | with the cursor in the lower half of it. The window | |
4795 | is split, and a message causes a redisplay before | |
4796 | a new cursor position has been computed. */ | |
7df02016 | 4797 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
4798 | { |
4799 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
4800 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
4801 | ||
7df02016 KS |
4802 | if (INTEGERP (w->left_margin_cols)) |
4803 | x += XFASTINT (w->left_margin_cols); | |
177c0ea7 | 4804 | |
7df02016 | 4805 | /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */ |
385ed61f | 4806 | cursor_to (f, y, x); |
5f5c8ee5 GM |
4807 | } |
4808 | } | |
4588ec20 JB |
4809 | } |
4810 | ||
ef1b0ba7 | 4811 | #if !PERIODIC_PREEMPTION_CHECKING |
4588ec20 | 4812 | do_pause: |
ef1b0ba7 | 4813 | #endif |
4588ec20 | 4814 | |
5f5c8ee5 | 4815 | clear_desired_matrices (f); |
4588ec20 JB |
4816 | return pause; |
4817 | } | |
4818 | ||
4588ec20 | 4819 | |
5f5c8ee5 | 4820 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 4821 | |
dfcf069d | 4822 | int |
971de7fb | 4823 | scrolling (struct frame *frame) |
4588ec20 JB |
4824 | { |
4825 | int unchanged_at_top, unchanged_at_bottom; | |
4826 | int window_size; | |
4827 | int changed_lines; | |
7df02016 KS |
4828 | int *old_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); |
4829 | int *new_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4830 | int *draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4831 | int *old_draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 4832 | register int i; |
7df02016 | 4833 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
4834 | struct glyph_matrix *current_matrix = frame->current_matrix; |
4835 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 4836 | |
5f5c8ee5 GM |
4837 | if (!current_matrix) |
4838 | abort (); | |
4588ec20 | 4839 | |
5f5c8ee5 GM |
4840 | /* Compute hash codes of all the lines. Also calculate number of |
4841 | changed lines, number of unchanged lines at the beginning, and | |
4842 | number of unchanged lines at the end. */ | |
4588ec20 JB |
4843 | changed_lines = 0; |
4844 | unchanged_at_top = 0; | |
7df02016 KS |
4845 | unchanged_at_bottom = FRAME_LINES (frame); |
4846 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
4847 | { |
4848 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 4849 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 4850 | return 0; |
5f5c8ee5 GM |
4851 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
4852 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
4853 | { |
4854 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
4855 | new_hash[i] = old_hash[i]; | |
4856 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
4857 | draw_cost[i] = INFINITY; | |
4858 | } | |
4588ec20 | 4859 | else |
f188b3c4 | 4860 | { |
5f5c8ee5 GM |
4861 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
4862 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 4863 | } |
4588ec20 JB |
4864 | |
4865 | if (old_hash[i] != new_hash[i]) | |
4866 | { | |
4867 | changed_lines++; | |
7df02016 | 4868 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
4869 | } |
4870 | else if (i == unchanged_at_top) | |
4871 | unchanged_at_top++; | |
5f5c8ee5 | 4872 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
4873 | } |
4874 | ||
4875 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
daf01701 | 4876 | if ((!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4877 | && changed_lines < baud_rate / 2400) |
7df02016 | 4878 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
4879 | return 1; |
4880 | ||
7df02016 | 4881 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
4882 | - unchanged_at_bottom); |
4883 | ||
daf01701 | 4884 | if (FRAME_SCROLL_REGION_OK (frame)) |
4588ec20 | 4885 | free_at_end_vpos -= unchanged_at_bottom; |
daf01701 | 4886 | else if (FRAME_MEMORY_BELOW_FRAME (frame)) |
4588ec20 JB |
4887 | free_at_end_vpos = -1; |
4888 | ||
4889 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 4890 | current frame and desired frame, don't bother with i/d calc. */ |
daf01701 | 4891 | if (!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4892 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
4893 | && (window_size >= |
4894 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 4895 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
4896 | old_hash, new_hash, draw_cost))) |
4897 | return 0; | |
4898 | ||
5f5c8ee5 GM |
4899 | if (window_size < 2) |
4900 | return 0; | |
4901 | ||
502b9b64 | 4902 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 4903 | draw_cost + unchanged_at_top - 1, |
190bb91a | 4904 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
4905 | old_hash + unchanged_at_top - 1, |
4906 | new_hash + unchanged_at_top - 1, | |
4907 | free_at_end_vpos - unchanged_at_top); | |
4908 | ||
4909 | return 0; | |
4910 | } | |
4588ec20 | 4911 | |
4588ec20 | 4912 | |
5f5c8ee5 GM |
4913 | /* Count the number of blanks at the start of the vector of glyphs R |
4914 | which is LEN glyphs long. */ | |
4588ec20 | 4915 | |
4588ec20 | 4916 | static int |
971de7fb | 4917 | count_blanks (struct glyph *r, int len) |
4588ec20 | 4918 | { |
5f5c8ee5 | 4919 | int i; |
177c0ea7 | 4920 | |
5f5c8ee5 GM |
4921 | for (i = 0; i < len; ++i) |
4922 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
4923 | break; | |
4924 | ||
4925 | return i; | |
4588ec20 JB |
4926 | } |
4927 | ||
5f5c8ee5 GM |
4928 | |
4929 | /* Count the number of glyphs in common at the start of the glyph | |
4930 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
4931 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
4932 | ||
4588ec20 | 4933 | static int |
971de7fb | 4934 | count_match (struct glyph *str1, struct glyph *end1, struct glyph *str2, struct glyph *end2) |
4588ec20 | 4935 | { |
5f5c8ee5 GM |
4936 | struct glyph *p1 = str1; |
4937 | struct glyph *p2 = str2; | |
177c0ea7 | 4938 | |
5f5c8ee5 GM |
4939 | while (p1 < end1 |
4940 | && p2 < end2 | |
42186983 | 4941 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 4942 | ++p1, ++p2; |
177c0ea7 | 4943 | |
5f5c8ee5 | 4944 | return p1 - str1; |
4588ec20 JB |
4945 | } |
4946 | ||
5f5c8ee5 | 4947 | |
4588ec20 | 4948 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 4949 | |
7df02016 | 4950 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))]) |
4588ec20 | 4951 | |
5f5c8ee5 GM |
4952 | |
4953 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
4954 | ||
4588ec20 | 4955 | static void |
971de7fb | 4956 | update_frame_line (struct frame *f, int vpos) |
4588ec20 | 4957 | { |
5f5c8ee5 | 4958 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
4959 | int tem; |
4960 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
4961 | struct glyph_matrix *current_matrix = f->current_matrix; |
4962 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
4963 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
4964 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
4965 | int must_write_whole_line_p; | |
daf01701 | 4966 | int write_spaces_p = FRAME_MUST_WRITE_SPACES (f); |
c363a1d6 | 4967 | int colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background |
0a894bad GM |
4968 | != FACE_TTY_DEFAULT_BG_COLOR); |
4969 | ||
4970 | if (colored_spaces_p) | |
4971 | write_spaces_p = 1; | |
5f5c8ee5 | 4972 | |
26c63686 GM |
4973 | /* Current row not enabled means it has unknown contents. We must |
4974 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
4975 | must_write_whole_line_p = !current_row->enabled_p; |
4976 | if (must_write_whole_line_p) | |
4588ec20 | 4977 | { |
5f5c8ee5 | 4978 | obody = 0; |
4588ec20 JB |
4979 | olen = 0; |
4980 | } | |
4981 | else | |
4982 | { | |
5f5c8ee5 GM |
4983 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
4984 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 4985 | |
4cecaab8 MB |
4986 | /* Ignore trailing spaces, if we can. */ |
4987 | if (!write_spaces_p) | |
4988 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
4989 | olen--; | |
4588ec20 JB |
4990 | } |
4991 | ||
5f5c8ee5 GM |
4992 | current_row->enabled_p = 1; |
4993 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 4994 | |
5f5c8ee5 GM |
4995 | /* If desired line is empty, just clear the line. */ |
4996 | if (!desired_row->enabled_p) | |
4588ec20 JB |
4997 | { |
4998 | nlen = 0; | |
4999 | goto just_erase; | |
5000 | } | |
5001 | ||
5f5c8ee5 GM |
5002 | nbody = desired_row->glyphs[TEXT_AREA]; |
5003 | nlen = desired_row->used[TEXT_AREA]; | |
5004 | nend = nbody + nlen; | |
5005 | ||
5006 | /* If display line has unknown contents, write the whole line. */ | |
5007 | if (must_write_whole_line_p) | |
5008 | { | |
26c63686 | 5009 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 5010 | if (!write_spaces_p) |
74ca462f GM |
5011 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
5012 | --nlen; | |
5013 | ||
26c63686 | 5014 | /* Write the contents of the desired line. */ |
74ca462f | 5015 | if (nlen) |
26c63686 | 5016 | { |
385ed61f KL |
5017 | cursor_to (f, vpos, 0); |
5018 | write_glyphs (f, nbody, nlen); | |
26c63686 | 5019 | } |
177c0ea7 | 5020 | |
26c63686 GM |
5021 | /* Don't call clear_end_of_line if we already wrote the whole |
5022 | line. The cursor will not be at the right margin in that | |
5023 | case but in the line below. */ | |
7df02016 | 5024 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 | 5025 | { |
385ed61f KL |
5026 | cursor_to (f, vpos, nlen); |
5027 | clear_end_of_line (f, FRAME_TOTAL_COLS (f)); | |
26c63686 | 5028 | } |
58827478 GM |
5029 | else |
5030 | /* Make sure we are in the right row, otherwise cursor movement | |
5031 | with cmgoto might use `ch' in the wrong row. */ | |
385ed61f | 5032 | cursor_to (f, vpos, 0); |
177c0ea7 | 5033 | |
5f5c8ee5 GM |
5034 | make_current (desired_matrix, current_matrix, vpos); |
5035 | return; | |
5036 | } | |
4588ec20 JB |
5037 | |
5038 | /* Pretend trailing spaces are not there at all, | |
5039 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
5040 | if (!write_spaces_p) |
5041 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
5042 | nlen--; | |
4588ec20 JB |
5043 | |
5044 | /* If there's no i/d char, quickly do the best we can without it. */ | |
daf01701 | 5045 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
4588ec20 | 5046 | { |
5f5c8ee5 | 5047 | int i, j; |
4588ec20 | 5048 | |
5f5c8ee5 GM |
5049 | /* Find the first glyph in desired row that doesn't agree with |
5050 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
5051 | for (i = 0; i < nlen; i++) |
5052 | { | |
5f5c8ee5 | 5053 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 5054 | { |
5f5c8ee5 GM |
5055 | /* Find the end of the run of different glyphs. */ |
5056 | j = i + 1; | |
5057 | while (j < nlen | |
5058 | && (j >= olen | |
5059 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
5060 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
5061 | ++j; | |
177c0ea7 JB |
5062 | |
5063 | /* Output this run of non-matching chars. */ | |
385ed61f KL |
5064 | cursor_to (f, vpos, i); |
5065 | write_glyphs (f, nbody + i, j - i); | |
5f5c8ee5 | 5066 | i = j - 1; |
4588ec20 JB |
5067 | |
5068 | /* Now find the next non-match. */ | |
5069 | } | |
5070 | } | |
5071 | ||
5072 | /* Clear the rest of the line, or the non-clear part of it. */ | |
5073 | if (olen > nlen) | |
5074 | { | |
385ed61f KL |
5075 | cursor_to (f, vpos, nlen); |
5076 | clear_end_of_line (f, olen); | |
4588ec20 JB |
5077 | } |
5078 | ||
5f5c8ee5 GM |
5079 | /* Make current row = desired row. */ |
5080 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
5081 | return; |
5082 | } | |
5083 | ||
5f5c8ee5 GM |
5084 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
5085 | characters in a row. */ | |
5086 | ||
4588ec20 JB |
5087 | if (!olen) |
5088 | { | |
5f5c8ee5 GM |
5089 | /* If current line is blank, skip over initial spaces, if |
5090 | possible, and write the rest. */ | |
4cecaab8 | 5091 | if (write_spaces_p) |
5f5c8ee5 GM |
5092 | nsp = 0; |
5093 | else | |
5094 | nsp = count_blanks (nbody, nlen); | |
5095 | ||
4588ec20 JB |
5096 | if (nlen > nsp) |
5097 | { | |
385ed61f KL |
5098 | cursor_to (f, vpos, nsp); |
5099 | write_glyphs (f, nbody + nsp, nlen - nsp); | |
4588ec20 JB |
5100 | } |
5101 | ||
502b9b64 | 5102 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 5103 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
5104 | return; |
5105 | } | |
5106 | ||
4588ec20 | 5107 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 5108 | osp = count_blanks (obody, olen); |
4cecaab8 | 5109 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 5110 | |
5f5c8ee5 GM |
5111 | /* Compute number of matching chars starting with first non-blank. */ |
5112 | begmatch = count_match (obody + osp, obody + olen, | |
5113 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
5114 | |
5115 | /* Spaces in new match implicit space past the end of old. */ | |
5116 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 5117 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
5118 | { |
5119 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
5120 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
5121 | ++begmatch; | |
4588ec20 JB |
5122 | } |
5123 | ||
5124 | /* Avoid doing insert/delete char | |
5125 | just cause number of leading spaces differs | |
5f5c8ee5 | 5126 | when the following text does not match. */ |
4588ec20 JB |
5127 | if (begmatch == 0 && osp != nsp) |
5128 | osp = nsp = min (osp, nsp); | |
5129 | ||
5130 | /* Find matching characters at end of line */ | |
5131 | op1 = obody + olen; | |
5132 | np1 = nbody + nlen; | |
5133 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
5134 | while (op1 > op2 |
5135 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
5136 | { |
5137 | op1--; | |
5138 | np1--; | |
5139 | } | |
5140 | endmatch = obody + olen - op1; | |
5141 | ||
4588ec20 JB |
5142 | /* tem gets the distance to insert or delete. |
5143 | endmatch is how many characters we save by doing so. | |
5144 | Is it worth it? */ | |
5145 | ||
5146 | tem = (nlen - nsp) - (olen - osp); | |
5147 | if (endmatch && tem | |
daf01701 | 5148 | && (!FRAME_CHAR_INS_DEL_OK (f) |
8a56675d | 5149 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
5150 | endmatch = 0; |
5151 | ||
5152 | /* nsp - osp is the distance to insert or delete. | |
5153 | If that is nonzero, begmatch is known to be nonzero also. | |
5154 | begmatch + endmatch is how much we save by doing the ins/del. | |
5155 | Is it worth it? */ | |
5156 | ||
5157 | if (nsp != osp | |
daf01701 | 5158 | && (!FRAME_CHAR_INS_DEL_OK (f) |
c363a1d6 | 5159 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
5160 | { |
5161 | begmatch = 0; | |
5162 | endmatch = 0; | |
5163 | osp = nsp = min (osp, nsp); | |
5164 | } | |
5165 | ||
5166 | /* Now go through the line, inserting, writing and | |
5167 | deleting as appropriate. */ | |
5168 | ||
5169 | if (osp > nsp) | |
5170 | { | |
385ed61f KL |
5171 | cursor_to (f, vpos, nsp); |
5172 | delete_glyphs (f, osp - nsp); | |
4588ec20 JB |
5173 | } |
5174 | else if (nsp > osp) | |
5175 | { | |
5176 | /* If going to delete chars later in line | |
5177 | and insert earlier in the line, | |
5178 | must delete first to avoid losing data in the insert */ | |
5179 | if (endmatch && nlen < olen + nsp - osp) | |
5180 | { | |
385ed61f KL |
5181 | cursor_to (f, vpos, nlen - endmatch + osp - nsp); |
5182 | delete_glyphs (f, olen + nsp - osp - nlen); | |
4588ec20 JB |
5183 | olen = nlen - (nsp - osp); |
5184 | } | |
385ed61f KL |
5185 | cursor_to (f, vpos, osp); |
5186 | insert_glyphs (f, 0, nsp - osp); | |
4588ec20 JB |
5187 | } |
5188 | olen += nsp - osp; | |
5189 | ||
5190 | tem = nsp + begmatch + endmatch; | |
5191 | if (nlen != tem || olen != tem) | |
5192 | { | |
4588ec20 JB |
5193 | if (!endmatch || nlen == olen) |
5194 | { | |
c363a1d6 GM |
5195 | /* If new text being written reaches right margin, there is |
5196 | no need to do clear-to-eol at the end of this function | |
5197 | (and it would not be safe, since cursor is not going to | |
5198 | be "at the margin" after the text is done). */ | |
7df02016 | 5199 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 5200 | olen = 0; |
c363a1d6 GM |
5201 | |
5202 | /* Function write_glyphs is prepared to do nothing | |
5203 | if passed a length <= 0. Check it here to avoid | |
5204 | unnecessary cursor movement. */ | |
5205 | if (nlen - tem > 0) | |
5206 | { | |
385ed61f KL |
5207 | cursor_to (f, vpos, nsp + begmatch); |
5208 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
c363a1d6 | 5209 | } |
4588ec20 JB |
5210 | } |
5211 | else if (nlen > olen) | |
5212 | { | |
24e86043 KH |
5213 | /* Here, we used to have the following simple code: |
5214 | ---------------------------------------- | |
5215 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
5216 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
5217 | ---------------------------------------- | |
5218 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
5219 | is a padding glyph. */ | |
5220 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
5221 | int del; | |
5f5c8ee5 | 5222 | |
385ed61f | 5223 | cursor_to (f, vpos, nsp + begmatch); |
177c0ea7 | 5224 | |
5f5c8ee5 | 5225 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
5226 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
5227 | out--; | |
385ed61f | 5228 | write_glyphs (f, nbody + nsp + begmatch, out); |
177c0ea7 | 5229 | |
5f5c8ee5 GM |
5230 | /* If we left columns to be overwritten, we must delete them. */ |
5231 | del = olen - tem - out; | |
c363a1d6 | 5232 | if (del > 0) |
385ed61f | 5233 | delete_glyphs (f, del); |
177c0ea7 | 5234 | |
5f5c8ee5 | 5235 | /* At last, we insert columns not yet written out. */ |
385ed61f | 5236 | insert_glyphs (f, nbody + nsp + begmatch + out, nlen - olen + del); |
5f5c8ee5 GM |
5237 | olen = nlen; |
5238 | } | |
5239 | else if (olen > nlen) | |
5240 | { | |
385ed61f KL |
5241 | cursor_to (f, vpos, nsp + begmatch); |
5242 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
5243 | delete_glyphs (f, olen - nlen); | |
5f5c8ee5 GM |
5244 | olen = nlen; |
5245 | } | |
bd9e3e75 | 5246 | } |
5f5c8ee5 GM |
5247 | |
5248 | just_erase: | |
5249 | /* If any unerased characters remain after the new line, erase them. */ | |
5250 | if (olen > nlen) | |
078b3696 | 5251 | { |
385ed61f KL |
5252 | cursor_to (f, vpos, nlen); |
5253 | clear_end_of_line (f, olen); | |
078b3696 | 5254 | } |
5f5c8ee5 GM |
5255 | |
5256 | /* Exchange contents between current_frame and new_frame. */ | |
5257 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5258 | } |
5f5c8ee5 GM |
5259 | |
5260 | ||
078b3696 | 5261 | \f |
5f5c8ee5 GM |
5262 | /*********************************************************************** |
5263 | X/Y Position -> Buffer Position | |
5264 | ***********************************************************************/ | |
5265 | ||
a1b0a6db | 5266 | /* Determine what's under window-relative pixel position (*X, *Y). |
2396cbba | 5267 | Return the OBJECT (string or buffer) that's there. |
6b61353c | 5268 | Return in *POS the position in that object. |
2396cbba EZ |
5269 | Adjust *X and *Y to character positions. |
5270 | Return in *DX and *DY the pixel coordinates of the click, | |
5271 | relative to the top left corner of OBJECT, or relative to | |
5272 | the top left corner of the character glyph at (*X, *Y) | |
5273 | if OBJECT is nil. | |
5274 | Return WIDTH and HEIGHT of the object at (*X, *Y), or zero | |
5275 | if the coordinates point to an empty area of the display. */ | |
5f5c8ee5 | 5276 | |
6b61353c | 5277 | Lisp_Object |
971de7fb | 5278 | 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 | 5279 | { |
5f5c8ee5 | 5280 | struct it it; |
707ea971 | 5281 | Lisp_Object old_current_buffer = Fcurrent_buffer (); |
5f5c8ee5 | 5282 | struct text_pos startp; |
6b61353c KH |
5283 | Lisp_Object string; |
5284 | struct glyph_row *row; | |
cedd7cd9 KS |
5285 | #ifdef HAVE_WINDOW_SYSTEM |
5286 | struct image *img = 0; | |
5287 | #endif | |
2396cbba | 5288 | int x0, x1, to_x; |
5f5c8ee5 | 5289 | |
707ea971 CY |
5290 | /* We used to set current_buffer directly here, but that does the |
5291 | wrong thing with `face-remapping-alist' (bug#2044). */ | |
5292 | Fset_buffer (w->buffer); | |
5f5c8ee5 GM |
5293 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
5294 | CHARPOS (startp) = min (ZV, max (BEGV, CHARPOS (startp))); | |
5295 | BYTEPOS (startp) = min (ZV_BYTE, max (BEGV_BYTE, BYTEPOS (startp))); | |
5296 | start_display (&it, w, startp); | |
177c0ea7 | 5297 | |
9173a8fb | 5298 | x0 = *x; |
2396cbba EZ |
5299 | |
5300 | /* First, move to the beginning of the row corresponding to *Y. We | |
5301 | need to be in that row to get the correct value of base paragraph | |
40629f17 | 5302 | direction for the text at (*X, *Y). */ |
2396cbba EZ |
5303 | move_it_to (&it, -1, 0, *y, -1, MOVE_TO_X | MOVE_TO_Y); |
5304 | ||
5305 | /* TO_X is the pixel position that the iterator will compute for the | |
40629f17 EZ |
5306 | glyph at *X. We add it.first_visible_x because iterator |
5307 | positions include the hscroll. */ | |
2396cbba EZ |
5308 | to_x = x0 + it.first_visible_x; |
5309 | if (it.bidi_it.paragraph_dir == R2L) | |
5310 | /* For lines in an R2L paragraph, we need to mirror TO_X wrt the | |
5311 | text area. This is because the iterator, even in R2L | |
5312 | paragraphs, delivers glyphs as if they started at the left | |
5313 | margin of the window. (When we actually produce glyphs for | |
5314 | display, we reverse their order in PRODUCE_GLYPHS, but the | |
5315 | iterator doesn't know about that.) The following line adjusts | |
5316 | the pixel position to the iterator geometry, which is what | |
40629f17 EZ |
5317 | move_it_* routines use. (The -1 is because in a window whose |
5318 | text-area width is W, the rightmost pixel position is W-1, and | |
5319 | it should be mirrored into zero pixel position.) */ | |
5320 | to_x = window_box_width (w, TEXT_AREA) - to_x - 1; | |
5321 | ||
5322 | /* Now move horizontally in the row to the glyph under *X. Second | |
5323 | argument is ZV to prevent move_it_in_display_line from matching | |
5324 | based on buffer positions. */ | |
2396cbba | 5325 | move_it_in_display_line (&it, ZV, to_x, MOVE_TO_X); |
177c0ea7 | 5326 | |
707ea971 | 5327 | Fset_buffer (old_current_buffer); |
a1b0a6db | 5328 | |
6b61353c KH |
5329 | *dx = x0 + it.first_visible_x - it.current_x; |
5330 | *dy = *y - it.current_y; | |
5331 | ||
5332 | string = w->buffer; | |
5333 | if (STRINGP (it.string)) | |
5334 | string = it.string; | |
a1b0a6db | 5335 | *pos = it.current; |
86282aab KH |
5336 | if (it.what == IT_COMPOSITION |
5337 | && it.cmp_it.nchars > 1 | |
5338 | && it.cmp_it.reversed_p) | |
5339 | { | |
5340 | /* The current display element is a grapheme cluster in a | |
5341 | composition. In that case, we need the position of the first | |
5342 | character of the cluster. But, as it.cmp_it.reversed_p is 1, | |
5343 | it.current points to the last character of the cluster, thus | |
5344 | we must move back to the first character of the same | |
5345 | cluster. */ | |
5346 | CHARPOS (pos->pos) -= it.cmp_it.nchars - 1; | |
5347 | if (STRINGP (it.string)) | |
5348 | BYTEPOS (pos->pos) = string_char_to_byte (string, CHARPOS (pos->pos)); | |
5349 | else | |
5350 | BYTEPOS (pos->pos) = CHAR_TO_BYTE (CHARPOS (pos->pos)); | |
5351 | } | |
6b61353c KH |
5352 | |
5353 | #ifdef HAVE_WINDOW_SYSTEM | |
5354 | if (it.what == IT_IMAGE) | |
5355 | { | |
6b61353c KH |
5356 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5357 | && !NILP (img->spec)) | |
5358 | *object = img->spec; | |
5359 | } | |
5360 | #endif | |
5361 | ||
b70d98e1 KS |
5362 | if (it.vpos < w->current_matrix->nrows |
5363 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5364 | row->enabled_p)) | |
6b61353c KH |
5365 | { |
5366 | if (it.hpos < row->used[TEXT_AREA]) | |
5367 | { | |
5368 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6b61353c | 5369 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5370 | if (img) |
5371 | { | |
5372 | *dy -= row->ascent - glyph->ascent; | |
4be9765d KH |
5373 | *dx += glyph->slice.img.x; |
5374 | *dy += glyph->slice.img.y; | |
cedd7cd9 KS |
5375 | /* Image slices positions are still relative to the entire image */ |
5376 | *width = img->width; | |
5377 | *height = img->height; | |
5378 | } | |
5379 | else | |
6b61353c | 5380 | #endif |
cedd7cd9 KS |
5381 | { |
5382 | *width = glyph->pixel_width; | |
5383 | *height = glyph->ascent + glyph->descent; | |
5384 | } | |
6b61353c KH |
5385 | } |
5386 | else | |
5387 | { | |
5388 | *width = 0; | |
5389 | *height = row->height; | |
5390 | } | |
5391 | } | |
5392 | else | |
5393 | { | |
5394 | *width = *height = 0; | |
5395 | } | |
5396 | ||
5397 | /* Add extra (default width) columns if clicked after EOL. */ | |
5398 | x1 = max(0, it.current_x + it.pixel_width - it.first_visible_x); | |
5399 | if (x0 > x1) | |
5400 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5401 | ||
5402 | *x = it.hpos; | |
5403 | *y = it.vpos; | |
5404 | ||
5405 | return string; | |
5f5c8ee5 | 5406 | } |
4588ec20 | 5407 | |
5f5c8ee5 GM |
5408 | |
5409 | /* Value is the string under window-relative coordinates X/Y in the | |
6b61353c KH |
5410 | mode line or header line (PART says which) of window W, or nil if none. |
5411 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
5412 | |
5413 | Lisp_Object | |
ace1712c EZ |
5414 | mode_line_string (struct window *w, enum window_part part, |
5415 | int *x, int *y, EMACS_INT *charpos, Lisp_Object *object, | |
5416 | int *dx, int *dy, int *width, int *height) | |
5f5c8ee5 GM |
5417 | { |
5418 | struct glyph_row *row; | |
5419 | struct glyph *glyph, *end; | |
6b61353c | 5420 | int x0, y0; |
5f5c8ee5 GM |
5421 | Lisp_Object string = Qnil; |
5422 | ||
641bdbf3 | 5423 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
5424 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
5425 | else | |
045dee35 | 5426 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
6b61353c KH |
5427 | y0 = *y - row->y; |
5428 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
5f5c8ee5 GM |
5429 | |
5430 | if (row->mode_line_p && row->enabled_p) | |
4588ec20 | 5431 | { |
5f5c8ee5 GM |
5432 | /* Find the glyph under X. If we find one with a string object, |
5433 | it's the one we were looking for. */ | |
5434 | glyph = row->glyphs[TEXT_AREA]; | |
5435 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 5436 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5437 | x0 -= glyph->pixel_width; |
5438 | *x = glyph - row->glyphs[TEXT_AREA]; | |
5439 | if (glyph < end) | |
5440 | { | |
5441 | string = glyph->object; | |
5442 | *charpos = glyph->charpos; | |
5443 | *width = glyph->pixel_width; | |
5444 | *height = glyph->ascent + glyph->descent; | |
5445 | #ifdef HAVE_WINDOW_SYSTEM | |
5446 | if (glyph->type == IMAGE_GLYPH) | |
5447 | { | |
5448 | struct image *img; | |
5449 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5450 | if (img != NULL) | |
5451 | *object = img->spec; | |
5452 | y0 -= row->ascent - glyph->ascent; | |
5453 | } | |
5454 | #endif | |
5455 | } | |
5456 | else | |
5457 | { | |
5458 | /* Add extra (default width) columns if clicked after EOL. */ | |
5459 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5460 | *width = 0; | |
5461 | *height = row->height; | |
5462 | } | |
5463 | } | |
5464 | else | |
5465 | { | |
5466 | *x = 0; | |
5467 | x0 = 0; | |
5468 | *width = *height = 0; | |
4588ec20 | 5469 | } |
5f5c8ee5 | 5470 | |
6b61353c KH |
5471 | *dx = x0; |
5472 | *dy = y0; | |
5473 | ||
5f5c8ee5 | 5474 | return string; |
4588ec20 | 5475 | } |
5f5c8ee5 GM |
5476 | |
5477 | ||
db1db309 GM |
5478 | /* Value is the string under window-relative coordinates X/Y in either |
5479 | marginal area, or nil if none. *CHARPOS is set to the position in | |
5480 | the string returned. */ | |
5481 | ||
5482 | Lisp_Object | |
ace1712c EZ |
5483 | marginal_area_string (struct window *w, enum window_part part, |
5484 | int *x, int *y, EMACS_INT *charpos, Lisp_Object *object, | |
5485 | int *dx, int *dy, int *width, int *height) | |
db1db309 GM |
5486 | { |
5487 | struct glyph_row *row = w->current_matrix->rows; | |
5488 | struct glyph *glyph, *end; | |
6b61353c | 5489 | int x0, y0, i, wy = *y; |
641bdbf3 | 5490 | int area; |
db1db309 GM |
5491 | Lisp_Object string = Qnil; |
5492 | ||
641bdbf3 | 5493 | if (part == ON_LEFT_MARGIN) |
db1db309 | 5494 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 5495 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
5496 | area = RIGHT_MARGIN_AREA; |
5497 | else | |
5498 | abort (); | |
5499 | ||
5500 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
5501 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
5502 | break; | |
6b61353c KH |
5503 | y0 = *y - row->y; |
5504 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
db1db309 GM |
5505 | |
5506 | if (row->enabled_p) | |
5507 | { | |
5508 | /* Find the glyph under X. If we find one with a string object, | |
5509 | it's the one we were looking for. */ | |
db1db309 | 5510 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 5511 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5512 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5513 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) |
5514 | + window_box_width (w, LEFT_MARGIN_AREA) | |
5515 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 5516 | else |
7df02016 | 5517 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5518 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5519 | : 0); |
5520 | ||
6b61353c KH |
5521 | glyph = row->glyphs[area]; |
5522 | end = glyph + row->used[area]; | |
cfde341f | 5523 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5524 | x0 -= glyph->pixel_width; |
5525 | *x = glyph - row->glyphs[area]; | |
5526 | if (glyph < end) | |
5527 | { | |
5528 | string = glyph->object; | |
5529 | *charpos = glyph->charpos; | |
5530 | *width = glyph->pixel_width; | |
5531 | *height = glyph->ascent + glyph->descent; | |
5532 | #ifdef HAVE_WINDOW_SYSTEM | |
5533 | if (glyph->type == IMAGE_GLYPH) | |
5534 | { | |
5535 | struct image *img; | |
5536 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5537 | if (img != NULL) | |
5538 | *object = img->spec; | |
5539 | y0 -= row->ascent - glyph->ascent; | |
4be9765d KH |
5540 | x0 += glyph->slice.img.x; |
5541 | y0 += glyph->slice.img.y; | |
6b61353c KH |
5542 | } |
5543 | #endif | |
5544 | } | |
5545 | else | |
5546 | { | |
5547 | /* Add extra (default width) columns if clicked after EOL. */ | |
5548 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5549 | *width = 0; | |
5550 | *height = row->height; | |
5551 | } | |
db1db309 | 5552 | } |
6b61353c KH |
5553 | else |
5554 | { | |
5555 | x0 = 0; | |
5556 | *x = 0; | |
5557 | *width = *height = 0; | |
5558 | } | |
5559 | ||
5560 | *dx = x0; | |
5561 | *dy = y0; | |
db1db309 GM |
5562 | |
5563 | return string; | |
5564 | } | |
5565 | ||
5566 | ||
5f5c8ee5 GM |
5567 | /*********************************************************************** |
5568 | Changing Frame Sizes | |
5569 | ***********************************************************************/ | |
4588ec20 JB |
5570 | |
5571 | #ifdef SIGWINCH | |
5f5c8ee5 | 5572 | |
09ad5a91 | 5573 | static SIGTYPE |
971de7fb DN |
5574 | window_change_signal (int signalnum) /* If we don't have an argument, */ |
5575 | /* some compilers complain in signal calls. */ | |
4588ec20 JB |
5576 | { |
5577 | int width, height; | |
4588ec20 JB |
5578 | int old_errno = errno; |
5579 | ||
28d7d09f | 5580 | struct tty_display_info *tty; |
4d553a13 | 5581 | |
333f1b6f JD |
5582 | signal (SIGWINCH, window_change_signal); |
5583 | SIGNAL_THREAD_CHECK (signalnum); | |
5584 | ||
9628b887 KL |
5585 | /* The frame size change obviously applies to a single |
5586 | termcap-controlled terminal, but we can't decide which. | |
5587 | Therefore, we resize the frames corresponding to each tty. | |
9628b887 KL |
5588 | */ |
5589 | for (tty = tty_list; tty; tty = tty->next) { | |
4588ec20 | 5590 | |
0a125897 KL |
5591 | if (! tty->term_initted) |
5592 | continue; | |
4588ec20 | 5593 | |
db878925 DN |
5594 | /* Suspended tty frames have tty->input == NULL avoid trying to |
5595 | use it. */ | |
5596 | if (!tty->input) | |
5597 | continue; | |
5598 | ||
0b0d3e0b | 5599 | get_tty_size (fileno (tty->input), &width, &height); |
3fc809e2 | 5600 | |
bedeffcf | 5601 | if (width > 5 && height > 2) { |
9628b887 | 5602 | Lisp_Object tail, frame; |
3fc809e2 | 5603 | |
9628b887 | 5604 | FOR_EACH_FRAME (tail, frame) |
4d553a13 KL |
5605 | if (FRAME_TERMCAP_P (XFRAME (frame)) && FRAME_TTY (XFRAME (frame)) == tty) |
5606 | /* Record the new sizes, but don't reallocate the data | |
5607 | structures now. Let that be done later outside of the | |
5608 | signal handler. */ | |
5609 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); | |
9628b887 | 5610 | } |
4588ec20 | 5611 | } |
3fc809e2 | 5612 | |
4588ec20 JB |
5613 | errno = old_errno; |
5614 | } | |
5615 | #endif /* SIGWINCH */ | |
5616 | ||
5617 | ||
b96fd3e8 GM |
5618 | /* Do any change in frame size that was requested by a signal. SAFE |
5619 | non-zero means this function is called from a place where it is | |
5620 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 5621 | |
dfcf069d | 5622 | void |
971de7fb | 5623 | do_pending_window_change (int safe) |
4588ec20 JB |
5624 | { |
5625 | /* If window_change_signal should have run before, run it now. */ | |
b96fd3e8 GM |
5626 | if (redisplaying_p && !safe) |
5627 | return; | |
177c0ea7 | 5628 | |
4588ec20 JB |
5629 | while (delayed_size_change) |
5630 | { | |
35f56f96 | 5631 | Lisp_Object tail, frame; |
4588ec20 JB |
5632 | |
5633 | delayed_size_change = 0; | |
5634 | ||
35f56f96 | 5635 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5636 | { |
5f5c8ee5 | 5637 | struct frame *f = XFRAME (frame); |
35f56f96 | 5638 | |
7df02016 KS |
5639 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
5640 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
5641 | 0, 0, safe); | |
4588ec20 JB |
5642 | } |
5643 | } | |
5644 | } | |
5645 | ||
5646 | ||
502b9b64 | 5647 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 5648 | indicate no change is to take place. |
4588ec20 | 5649 | |
b6a65ac2 JB |
5650 | If DELAY is non-zero, then assume we're being called from a signal |
5651 | handler, and queue the change for later - perhaps the next | |
5652 | redisplay. Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
5653 | from a signal handler. |
5654 | ||
5655 | SAFE non-zero means this function is called from a place where it's | |
5656 | safe to change frame sizes while a redisplay is in progress. */ | |
b6a65ac2 | 5657 | |
dfcf069d | 5658 | void |
971de7fb | 5659 | change_frame_size (register struct frame *f, int newheight, int newwidth, int pretend, int delay, int safe) |
45140e01 RS |
5660 | { |
5661 | Lisp_Object tail, frame; | |
3826ea1a | 5662 | |
9628b887 | 5663 | if (FRAME_MSDOS_P (f)) |
45140e01 | 5664 | { |
9628b887 KL |
5665 | /* On MS-DOS, all frames use the same screen, so a change in |
5666 | size affects all frames. Termcap now supports multiple | |
5667 | ttys. */ | |
45140e01 | 5668 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 5669 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 5670 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 5671 | pretend, delay, safe); |
45140e01 RS |
5672 | } |
5673 | else | |
b96fd3e8 | 5674 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
5675 | } |
5676 | ||
5677 | static void | |
971de7fb | 5678 | change_frame_size_1 (register struct frame *f, int newheight, int newwidth, int pretend, int delay, int safe) |
4588ec20 | 5679 | { |
7df02016 | 5680 | int new_frame_total_cols; |
aed13378 | 5681 | int count = SPECPDL_INDEX (); |
3826ea1a | 5682 | |
4588ec20 | 5683 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 5684 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 5685 | { |
7df02016 KS |
5686 | f->new_text_lines = newheight; |
5687 | f->new_text_cols = newwidth; | |
4588ec20 JB |
5688 | delayed_size_change = 1; |
5689 | return; | |
5690 | } | |
5691 | ||
502b9b64 | 5692 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
5693 | f->new_text_lines = 0; |
5694 | f->new_text_cols = 0; | |
b6a65ac2 | 5695 | |
08f7aa3e | 5696 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 5697 | if (newheight == 0) |
7df02016 | 5698 | newheight = FRAME_LINES (f); |
ae19c6f2 | 5699 | if (newwidth == 0) |
7df02016 | 5700 | newwidth = FRAME_COLS (f); |
3826ea1a | 5701 | |
5f5c8ee5 GM |
5702 | /* Compute width of windows in F. |
5703 | This is the width of the frame without vertical scroll bars. */ | |
7df02016 | 5704 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); |
3826ea1a | 5705 | |
b6a65ac2 | 5706 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 5707 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 JB |
5708 | |
5709 | /* If we're not changing the frame size, quit now. */ | |
5075d853 JD |
5710 | /* Frame width may be unchanged but the text portion may change, for example, |
5711 | fullscreen and remove/add scroll bar. */ | |
7df02016 | 5712 | if (newheight == FRAME_LINES (f) |
5075d853 JD |
5713 | && newwidth == FRAME_COLS (f) // text portion unchanged |
5714 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) // frame width unchanged | |
4588ec20 JB |
5715 | return; |
5716 | ||
cbb95688 RS |
5717 | BLOCK_INPUT; |
5718 | ||
886a8a6c KH |
5719 | #ifdef MSDOS |
5720 | /* We only can set screen dimensions to certain values supported | |
5721 | by our video hardware. Try to find the smallest size greater | |
5722 | or equal to the requested dimensions. */ | |
5723 | dos_set_window_size (&newheight, &newwidth); | |
5724 | #endif | |
5725 | ||
7df02016 | 5726 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 5727 | { |
5f5c8ee5 | 5728 | if (FRAME_HAS_MINIBUF_P (f) && !FRAME_MINIBUF_ONLY_P (f)) |
4588ec20 | 5729 | { |
5f5c8ee5 | 5730 | /* Frame has both root and mini-buffer. */ |
7df02016 | 5731 | XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f))->top_line, |
5f5c8ee5 GM |
5732 | FRAME_TOP_MARGIN (f)); |
5733 | set_window_height (FRAME_ROOT_WINDOW (f), | |
5734 | (newheight | |
5735 | - 1 | |
5736 | - FRAME_TOP_MARGIN (f)), | |
f8748f0f | 5737 | 2); |
7df02016 | 5738 | XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top_line, |
a5d8b611 | 5739 | newheight - 1); |
5f5c8ee5 | 5740 | set_window_height (FRAME_MINIBUF_WINDOW (f), 1, 0); |
4588ec20 JB |
5741 | } |
5742 | else | |
502b9b64 | 5743 | /* Frame has just one top-level window. */ |
5f5c8ee5 | 5744 | set_window_height (FRAME_ROOT_WINDOW (f), |
f8748f0f | 5745 | newheight - FRAME_TOP_MARGIN (f), 2); |
b6a65ac2 | 5746 | |
48e482e6 EZ |
5747 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5748 | manipulating video hardware. */ | |
5749 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5750 | FrameRows (FRAME_TTY (f)) = newheight; |
4588ec20 JB |
5751 | } |
5752 | ||
7df02016 | 5753 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 5754 | { |
f8748f0f | 5755 | set_window_width (FRAME_ROOT_WINDOW (f), new_frame_total_cols, 2); |
5f5c8ee5 | 5756 | if (FRAME_HAS_MINIBUF_P (f)) |
7df02016 | 5757 | set_window_width (FRAME_MINIBUF_WINDOW (f), new_frame_total_cols, 0); |
4588ec20 | 5758 | |
48e482e6 EZ |
5759 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5760 | manipulating video hardware. */ | |
5761 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5762 | FrameCols (FRAME_TTY (f)) = newwidth; |
5f5c8ee5 | 5763 | |
9ea173e8 | 5764 | if (WINDOWP (f->tool_bar_window)) |
7df02016 | 5765 | XSETFASTINT (XWINDOW (f->tool_bar_window)->total_cols, newwidth); |
4588ec20 JB |
5766 | } |
5767 | ||
7df02016 KS |
5768 | FRAME_LINES (f) = newheight; |
5769 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 5770 | |
5f5c8ee5 GM |
5771 | { |
5772 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
5773 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 5774 | |
5f5c8ee5 GM |
5775 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
5776 | &text_area_height); | |
5777 | if (w->cursor.x >= text_area_x + text_area_width) | |
5778 | w->cursor.hpos = w->cursor.x = 0; | |
5779 | if (w->cursor.y >= text_area_y + text_area_height) | |
5780 | w->cursor.vpos = w->cursor.y = 0; | |
5781 | } | |
986e61b8 | 5782 | |
5f5c8ee5 | 5783 | adjust_glyphs (f); |
5f5c8ee5 | 5784 | calculate_costs (f); |
cb02fa39 GM |
5785 | SET_FRAME_GARBAGED (f); |
5786 | f->resized_p = 1; | |
97cf50e7 RS |
5787 | |
5788 | UNBLOCK_INPUT; | |
61730a69 | 5789 | |
e523f7e5 RS |
5790 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); |
5791 | ||
ef264c42 | 5792 | run_window_configuration_change_hook (f); |
e523f7e5 RS |
5793 | |
5794 | unbind_to (count, Qnil); | |
4588ec20 | 5795 | } |
5f5c8ee5 GM |
5796 | |
5797 | ||
4588ec20 | 5798 | \f |
5f5c8ee5 GM |
5799 | /*********************************************************************** |
5800 | Terminal Related Lisp Functions | |
5801 | ***********************************************************************/ | |
5802 | ||
5803 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 5804 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
5805 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
5806 | FILE = nil means just close any termscript file currently open. */) | |
5842a27b | 5807 | (Lisp_Object file) |
5f5c8ee5 | 5808 | { |
0b0d3e0b KL |
5809 | struct tty_display_info *tty; |
5810 | ||
7d2f1216 EZ |
5811 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ()) |
5812 | && ! FRAME_MSDOS_P (SELECTED_FRAME ())) | |
0b0d3e0b KL |
5813 | error ("Current frame is not on a tty device"); |
5814 | ||
5815 | tty = CURTTY (); | |
5816 | ||
5817 | if (tty->termscript != 0) | |
e18c7093 KL |
5818 | { |
5819 | BLOCK_INPUT; | |
0b0d3e0b | 5820 | fclose (tty->termscript); |
e18c7093 KL |
5821 | UNBLOCK_INPUT; |
5822 | } | |
0b0d3e0b | 5823 | tty->termscript = 0; |
5f5c8ee5 GM |
5824 | |
5825 | if (! NILP (file)) | |
5826 | { | |
5827 | file = Fexpand_file_name (file, Qnil); | |
42a5b22f | 5828 | tty->termscript = fopen (SSDATA (file), "w"); |
0b0d3e0b | 5829 | if (tty->termscript == 0) |
5f5c8ee5 GM |
5830 | report_file_error ("Opening termscript", Fcons (file, Qnil)); |
5831 | } | |
5832 | return Qnil; | |
5833 | } | |
5834 | ||
5835 | ||
4588ec20 | 5836 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
62af879c | 5837 | Ssend_string_to_terminal, 1, 2, 0, |
7ee72033 | 5838 | doc: /* Send STRING to the terminal without alteration. |
62af879c KL |
5839 | Control characters in STRING will have terminal-dependent effects. |
5840 | ||
6ed8eeff | 5841 | Optional parameter TERMINAL specifies the tty terminal device to use. |
558759e4 AM |
5842 | It may be a terminal object, a frame, or nil for the terminal used by |
5843 | the currently selected frame. In batch mode, STRING is sent to stdout | |
5844 | when TERMINAL is nil. */) | |
5842a27b | 5845 | (Lisp_Object string, Lisp_Object terminal) |
4588ec20 | 5846 | { |
7cef7ce3 SM |
5847 | struct terminal *t = get_terminal (terminal, 1); |
5848 | FILE *out; | |
0b0d3e0b | 5849 | |
94f3db62 | 5850 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 5851 | CHECK_STRING (string); |
2c1e4409 | 5852 | BLOCK_INPUT; |
0b0d3e0b | 5853 | |
6ed8eeff KL |
5854 | if (!t) |
5855 | error ("Unknown terminal device"); | |
0b0d3e0b | 5856 | |
7cef7ce3 SM |
5857 | if (t->type == output_initial) |
5858 | out = stdout; | |
5859 | else if (t->type != output_termcap && t->type != output_msdos_raw) | |
5860 | error ("Device %d is not a termcap terminal device", t->id); | |
5861 | else | |
5862 | { | |
5863 | struct tty_display_info *tty = t->display_info.tty; | |
3fc809e2 | 5864 | |
7cef7ce3 SM |
5865 | if (! tty->output) |
5866 | error ("Terminal is currently suspended"); | |
cecfdea6 | 5867 | |
7cef7ce3 SM |
5868 | if (tty->termscript) |
5869 | { | |
5870 | fwrite (SDATA (string), 1, SBYTES (string), tty->termscript); | |
5871 | fflush (tty->termscript); | |
5872 | } | |
5873 | out = tty->output; | |
4588ec20 | 5874 | } |
7cef7ce3 SM |
5875 | fwrite (SDATA (string), 1, SBYTES (string), out); |
5876 | fflush (out); | |
2c1e4409 | 5877 | UNBLOCK_INPUT; |
4588ec20 JB |
5878 | return Qnil; |
5879 | } | |
5880 | ||
5f5c8ee5 | 5881 | |
4588ec20 | 5882 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 5883 | doc: /* Beep, or flash the screen. |
228299fa | 5884 | Also, unless an argument is given, |
7ee72033 | 5885 | terminate any keyboard macro currently executing. */) |
5842a27b | 5886 | (Lisp_Object arg) |
4588ec20 | 5887 | { |
efb859b4 | 5888 | if (!NILP (arg)) |
4588ec20 | 5889 | { |
7fa788da RS |
5890 | if (noninteractive) |
5891 | putchar (07); | |
5892 | else | |
385ed61f | 5893 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5894 | } |
5895 | else | |
5896 | bitch_at_user (); | |
5897 | ||
5898 | return Qnil; | |
5899 | } | |
5900 | ||
dfcf069d | 5901 | void |
971de7fb | 5902 | bitch_at_user (void) |
4588ec20 JB |
5903 | { |
5904 | if (noninteractive) | |
5905 | putchar (07); | |
5f5c8ee5 | 5906 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
4588ec20 JB |
5907 | error ("Keyboard macro terminated by a command ringing the bell"); |
5908 | else | |
385ed61f | 5909 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5910 | } |
5911 | ||
5f5c8ee5 GM |
5912 | |
5913 | \f | |
5914 | /*********************************************************************** | |
5915 | Sleeping, Waiting | |
5916 | ***********************************************************************/ | |
5917 | ||
4588ec20 | 5918 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 5919 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
5920 | SECONDS may be a floating-point value, meaning that you can wait for a |
5921 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
5922 | additional wait period, in milliseconds; this may be useful if your | |
5923 | Emacs was built without floating point support. | |
7ee72033 | 5924 | \(Not all operating systems support waiting for a fraction of a second.) */) |
5842a27b | 5925 | (Lisp_Object seconds, Lisp_Object milliseconds) |
4588ec20 | 5926 | { |
767229f8 | 5927 | int sec, usec; |
4588ec20 | 5928 | |
767229f8 | 5929 | if (NILP (milliseconds)) |
e9c9a718 | 5930 | XSETINT (milliseconds, 0); |
767229f8 | 5931 | else |
b7826503 | 5932 | CHECK_NUMBER (milliseconds); |
b07646f5 JB |
5933 | usec = XINT (milliseconds) * 1000; |
5934 | ||
b07646f5 JB |
5935 | { |
5936 | double duration = extract_float (seconds); | |
5937 | sec = (int) duration; | |
5938 | usec += (duration - sec) * 1000000; | |
5939 | } | |
4588ec20 | 5940 | |
a41f8bed | 5941 | #ifndef EMACS_HAS_USECS |
767229f8 | 5942 | if (sec == 0 && usec != 0) |
861e19b9 | 5943 | error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); |
4588ec20 | 5944 | #endif |
767229f8 JB |
5945 | |
5946 | /* Assure that 0 <= usec < 1000000. */ | |
5947 | if (usec < 0) | |
5948 | { | |
153a073c | 5949 | /* We can't rely on the rounding being correct if usec is negative. */ |
767229f8 JB |
5950 | if (-1000000 < usec) |
5951 | sec--, usec += 1000000; | |
5952 | else | |
5953 | sec -= -usec / 1000000, usec = 1000000 - (-usec % 1000000); | |
4588ec20 | 5954 | } |
767229f8 JB |
5955 | else |
5956 | sec += usec / 1000000, usec %= 1000000; | |
5957 | ||
6b5153b1 | 5958 | if (sec < 0 || (sec == 0 && usec == 0)) |
767229f8 | 5959 | return Qnil; |
4588ec20 | 5960 | |
dcd1ca45 | 5961 | wait_reading_process_output (sec, usec, 0, 0, Qnil, NULL, 0); |
4588ec20 JB |
5962 | |
5963 | return Qnil; | |
5964 | } | |
5965 | ||
5f5c8ee5 | 5966 | |
dcd1ca45 | 5967 | /* This is just like wait_reading_process_output, except that |
902b9b6d | 5968 | it does redisplay. |
f76475ad | 5969 | |
2bcac766 CY |
5970 | TIMEOUT is number of seconds to wait (float or integer), |
5971 | or t to wait forever. | |
902b9b6d KS |
5972 | READING is 1 if reading input. |
5973 | If DO_DISPLAY is >0 display process output while waiting. | |
5974 | If DO_DISPLAY is >1 perform an initial redisplay before waiting. | |
5975 | */ | |
4588ec20 | 5976 | |
f76475ad | 5977 | Lisp_Object |
971de7fb | 5978 | sit_for (Lisp_Object timeout, int reading, int do_display) |
f76475ad | 5979 | { |
902b9b6d | 5980 | int sec, usec; |
f222369e | 5981 | |
902b9b6d | 5982 | swallow_events (do_display); |
ccddf474 | 5983 | |
902b9b6d | 5984 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 5985 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 5986 | return Qnil; |
4588ec20 | 5987 | |
902b9b6d KS |
5988 | if (do_display >= 2) |
5989 | redisplay_preserve_echo_area (2); | |
5990 | ||
8e09f23f | 5991 | if (INTEGERP (timeout)) |
f222369e | 5992 | { |
7ff14773 | 5993 | sec = XINT (timeout); |
8e09f23f | 5994 | usec = 0; |
f222369e | 5995 | } |
8e09f23f KS |
5996 | else if (FLOATP (timeout)) |
5997 | { | |
99a20368 | 5998 | double seconds = XFLOAT_DATA (timeout); |
902b9b6d KS |
5999 | sec = (int) seconds; |
6000 | usec = (int) ((seconds - sec) * 1000000); | |
6001 | } | |
2bcac766 CY |
6002 | else if (EQ (timeout, Qt)) |
6003 | { | |
6004 | sec = 0; | |
6005 | usec = 0; | |
6006 | } | |
902b9b6d | 6007 | else |
8e09f23f | 6008 | wrong_type_argument (Qnumberp, timeout); |
4588ec20 | 6009 | |
2bcac766 | 6010 | if (sec == 0 && usec == 0 && !EQ (timeout, Qt)) |
dfdb645c JB |
6011 | return Qt; |
6012 | ||
4588ec20 | 6013 | #ifdef SIGIO |
8fc798e9 | 6014 | gobble_input (0); |
f76475ad JB |
6015 | #endif |
6016 | ||
902b9b6d | 6017 | wait_reading_process_output (sec, usec, reading ? -1 : 1, do_display, |
dcd1ca45 | 6018 | Qnil, NULL, 0); |
f76475ad | 6019 | |
4588ec20 JB |
6020 | return detect_input_pending () ? Qnil : Qt; |
6021 | } | |
6022 | ||
5f5c8ee5 | 6023 | |
01327edf KS |
6024 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
6025 | doc: /* Perform redisplay if no input is available. | |
a5c2c707 | 6026 | If optional arg FORCE is non-nil or `redisplay-dont-pause' is non-nil, |
03240971 KS |
6027 | perform a full redisplay even if input is available. |
6028 | Return t if redisplay was performed, nil otherwise. */) | |
5842a27b | 6029 | (Lisp_Object force) |
f76475ad | 6030 | { |
01327edf | 6031 | int count; |
659d9874 | 6032 | |
902b9b6d KS |
6033 | swallow_events (1); |
6034 | if ((detect_input_pending_run_timers (1) | |
01327edf | 6035 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
6036 | || !NILP (Vexecuting_kbd_macro)) |
6037 | return Qnil; | |
f76475ad | 6038 | |
01327edf KS |
6039 | count = SPECPDL_INDEX (); |
6040 | if (!NILP (force) && !redisplay_dont_pause) | |
6041 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 6042 | redisplay_preserve_echo_area (2); |
01327edf | 6043 | unbind_to (count, Qnil); |
7ba07a1a | 6044 | return Qt; |
f76475ad | 6045 | } |
5f5c8ee5 GM |
6046 | |
6047 | ||
6048 | \f | |
6049 | /*********************************************************************** | |
6050 | Other Lisp Functions | |
6051 | ***********************************************************************/ | |
6052 | ||
6053 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
6054 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 6055 | buffer-modified-flags. */ |
5f5c8ee5 GM |
6056 | |
6057 | static Lisp_Object frame_and_buffer_state; | |
6058 | ||
6059 | ||
6060 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 6061 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 6062 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
6063 | VARIABLE is a variable name whose value is either nil or a state vector |
6064 | that will be updated to contain all frames and buffers, | |
228299fa | 6065 | aside from buffers whose names start with space, |
44edd521 RS |
6066 | along with the buffers' read-only and modified flags. This allows a fast |
6067 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 6068 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
6069 | the current state. |
6070 | ||
6071 | If VARIABLE is nil, an internal variable is used. Users should not | |
6072 | pass nil for VARIABLE. */) | |
5842a27b | 6073 | (Lisp_Object variable) |
5f5c8ee5 | 6074 | { |
44edd521 RS |
6075 | Lisp_Object state, tail, frame, buf; |
6076 | Lisp_Object *vecp, *end; | |
5f5c8ee5 GM |
6077 | int n; |
6078 | ||
44edd521 RS |
6079 | if (! NILP (variable)) |
6080 | { | |
6081 | CHECK_SYMBOL (variable); | |
6082 | state = Fsymbol_value (variable); | |
6083 | if (! VECTORP (state)) | |
6084 | goto changed; | |
6085 | } | |
6086 | else | |
6087 | state = frame_and_buffer_state; | |
6088 | ||
6089 | vecp = XVECTOR (state)->contents; | |
6090 | end = vecp + XVECTOR (state)->size; | |
6091 | ||
5f5c8ee5 GM |
6092 | FOR_EACH_FRAME (tail, frame) |
6093 | { | |
44edd521 RS |
6094 | if (vecp == end) |
6095 | goto changed; | |
5f5c8ee5 GM |
6096 | if (!EQ (*vecp++, frame)) |
6097 | goto changed; | |
44edd521 RS |
6098 | if (vecp == end) |
6099 | goto changed; | |
5f5c8ee5 GM |
6100 | if (!EQ (*vecp++, XFRAME (frame)->name)) |
6101 | goto changed; | |
6102 | } | |
44edd521 | 6103 | /* Check that the buffer info matches. */ |
7539e11f | 6104 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6105 | { |
7539e11f | 6106 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6107 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 6108 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 6109 | continue; |
44edd521 RS |
6110 | if (vecp == end) |
6111 | goto changed; | |
5f5c8ee5 GM |
6112 | if (!EQ (*vecp++, buf)) |
6113 | goto changed; | |
44edd521 RS |
6114 | if (vecp == end) |
6115 | goto changed; | |
4b4deea2 | 6116 | if (!EQ (*vecp++, BVAR (XBUFFER (buf), read_only))) |
5f5c8ee5 | 6117 | goto changed; |
44edd521 RS |
6118 | if (vecp == end) |
6119 | goto changed; | |
5f5c8ee5 GM |
6120 | if (!EQ (*vecp++, Fbuffer_modified_p (buf))) |
6121 | goto changed; | |
6122 | } | |
44edd521 RS |
6123 | if (vecp == end) |
6124 | goto changed; | |
5f5c8ee5 GM |
6125 | /* Detect deletion of a buffer at the end of the list. */ |
6126 | if (EQ (*vecp, Qlambda)) | |
6127 | return Qnil; | |
44edd521 RS |
6128 | |
6129 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 6130 | changed: |
44edd521 RS |
6131 | /* Count the size we will need. |
6132 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
6133 | n = 1; |
6134 | FOR_EACH_FRAME (tail, frame) | |
6135 | n += 2; | |
7539e11f | 6136 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6137 | n += 3; |
44edd521 RS |
6138 | /* Reallocate the vector if data has grown to need it, |
6139 | or if it has shrunk a lot. */ | |
6140 | if (! VECTORP (state) | |
6141 | || n > XVECTOR (state)->size | |
6142 | || n + 20 < XVECTOR (state)->size / 2) | |
5f5c8ee5 | 6143 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
6144 | { |
6145 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
6146 | if (! NILP (variable)) | |
6147 | Fset (variable, state); | |
6148 | else | |
6149 | frame_and_buffer_state = state; | |
6150 | } | |
6151 | ||
6152 | /* Record the new data in the (possibly reallocated) vector. */ | |
6153 | vecp = XVECTOR (state)->contents; | |
5f5c8ee5 GM |
6154 | FOR_EACH_FRAME (tail, frame) |
6155 | { | |
6156 | *vecp++ = frame; | |
6157 | *vecp++ = XFRAME (frame)->name; | |
6158 | } | |
7539e11f | 6159 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6160 | { |
7539e11f | 6161 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6162 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 6163 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 GM |
6164 | continue; |
6165 | *vecp++ = buf; | |
4b4deea2 | 6166 | *vecp++ = BVAR (XBUFFER (buf), read_only); |
5f5c8ee5 GM |
6167 | *vecp++ = Fbuffer_modified_p (buf); |
6168 | } | |
6169 | /* Fill up the vector with lambdas (always at least one). */ | |
6170 | *vecp++ = Qlambda; | |
44edd521 RS |
6171 | while (vecp - XVECTOR (state)->contents |
6172 | < XVECTOR (state)->size) | |
5f5c8ee5 GM |
6173 | *vecp++ = Qlambda; |
6174 | /* Make sure we didn't overflow the vector. */ | |
44edd521 RS |
6175 | if (vecp - XVECTOR (state)->contents |
6176 | > XVECTOR (state)->size) | |
5f5c8ee5 GM |
6177 | abort (); |
6178 | return Qt; | |
6179 | } | |
6180 | ||
6181 | ||
4588ec20 | 6182 | \f |
5f5c8ee5 GM |
6183 | /*********************************************************************** |
6184 | Initialization | |
6185 | ***********************************************************************/ | |
6186 | ||
5f5c8ee5 GM |
6187 | /* Initialization done when Emacs fork is started, before doing stty. |
6188 | Determine terminal type and set terminal_driver. Then invoke its | |
6189 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 6190 | |
dfcf069d | 6191 | void |
971de7fb | 6192 | init_display (void) |
4588ec20 | 6193 | { |
28d440ab KL |
6194 | char *terminal_type; |
6195 | ||
5f5c8ee5 GM |
6196 | /* Construct the space glyph. */ |
6197 | space_glyph.type = CHAR_GLYPH; | |
3fc809e2 | 6198 | SET_CHAR_GLYPH (space_glyph, ' ', DEFAULT_FACE_ID, 0); |
5f5c8ee5 GM |
6199 | space_glyph.charpos = -1; |
6200 | ||
4588ec20 JB |
6201 | inverse_video = 0; |
6202 | cursor_in_echo_area = 0; | |
6203 | terminal_type = (char *) 0; | |
6204 | ||
1315c181 JB |
6205 | /* Now is the time to initialize this; it's used by init_sys_modes |
6206 | during startup. */ | |
2246281f | 6207 | Vinitial_window_system = Qnil; |
4588ec20 | 6208 | |
4181ad9c KL |
6209 | /* SIGWINCH needs to be handled no matter what display we start |
6210 | with. Otherwise newly opened tty frames will not resize | |
6211 | automatically. */ | |
6212 | #ifdef SIGWINCH | |
6213 | #ifndef CANNOT_DUMP | |
6214 | if (initialized) | |
6215 | #endif /* CANNOT_DUMP */ | |
6216 | signal (SIGWINCH, window_change_signal); | |
6217 | #endif /* SIGWINCH */ | |
4588ec20 | 6218 | |
d6ef42b9 | 6219 | /* If running as a daemon, no need to initialize any frames/terminal. */ |
ff808935 DN |
6220 | if (IS_DAEMON) |
6221 | return; | |
d6ef42b9 | 6222 | |
1315c181 JB |
6223 | /* If the user wants to use a window system, we shouldn't bother |
6224 | initializing the terminal. This is especially important when the | |
6225 | terminal is so dumb that emacs gives up before and doesn't bother | |
6226 | using the window system. | |
4588ec20 | 6227 | |
36bbad1d KH |
6228 | If the DISPLAY environment variable is set and nonempty, |
6229 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6230 | |
6231 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 6232 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 6233 | { |
36bbad1d | 6234 | char *display; |
36bbad1d | 6235 | display = getenv ("DISPLAY"); |
36bbad1d | 6236 | display_arg = (display != 0 && *display != 0); |
c1fc674b AS |
6237 | |
6238 | if (display_arg && !x_display_ok (display)) | |
6239 | { | |
6240 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
6241 | display); | |
6242 | inhibit_window_system = 1; | |
6243 | } | |
f040093a | 6244 | } |
d460af17 | 6245 | |
177c0ea7 | 6246 | if (!inhibit_window_system && display_arg |
9e4555e8 RS |
6247 | #ifndef CANNOT_DUMP |
6248 | && initialized | |
6249 | #endif | |
6250 | ) | |
4588ec20 | 6251 | { |
111d9af3 | 6252 | Vinitial_window_system = Qx; |
4588ec20 JB |
6253 | #ifdef HAVE_X11 |
6254 | Vwindow_system_version = make_number (11); | |
039e5d71 | 6255 | #endif |
8a2a6032 | 6256 | #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES) |
039e5d71 | 6257 | /* In some versions of ncurses, |
6a428f77 | 6258 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6259 | So call tgetent. */ |
6260 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 | 6261 | #endif |
5f5c8ee5 | 6262 | adjust_frame_glyphs_initially (); |
4588ec20 JB |
6263 | return; |
6264 | } | |
6265 | #endif /* HAVE_X_WINDOWS */ | |
6266 | ||
fd2e066a | 6267 | #ifdef HAVE_NTGUI |
177c0ea7 | 6268 | if (!inhibit_window_system) |
fd2e066a | 6269 | { |
111d9af3 | 6270 | Vinitial_window_system = Qw32; |
fd2e066a | 6271 | Vwindow_system_version = make_number (1); |
5f5c8ee5 | 6272 | adjust_frame_glyphs_initially (); |
fd2e066a GV |
6273 | return; |
6274 | } | |
6275 | #endif /* HAVE_NTGUI */ | |
6276 | ||
edfda783 AR |
6277 | #ifdef HAVE_NS |
6278 | if (!inhibit_window_system | |
6279 | #ifndef CANNOT_DUMP | |
6280 | && initialized | |
6281 | #endif | |
6282 | ) | |
6283 | { | |
111d9af3 | 6284 | Vinitial_window_system = Qns; |
edfda783 AR |
6285 | Vwindow_system_version = make_number(10); |
6286 | adjust_frame_glyphs_initially (); | |
6287 | return; | |
6288 | } | |
6289 | #endif | |
6290 | ||
4588ec20 JB |
6291 | /* If no window system has been specified, try to use the terminal. */ |
6292 | if (! isatty (0)) | |
6293 | { | |
1559a86d | 6294 | fatal ("standard input is not a tty"); |
4588ec20 JB |
6295 | exit (1); |
6296 | } | |
6297 | ||
6152361f JR |
6298 | #ifdef WINDOWSNT |
6299 | terminal_type = "w32console"; | |
6300 | #else | |
153a073c | 6301 | /* Look at the TERM variable. */ |
4588ec20 | 6302 | terminal_type = (char *) getenv ("TERM"); |
6152361f | 6303 | #endif |
4588ec20 JB |
6304 | if (!terminal_type) |
6305 | { | |
5d12ff0b | 6306 | #ifdef HAVE_WINDOW_SYSTEM |
b9e590fc RS |
6307 | if (! inhibit_window_system) |
6308 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6309 | else |
6310 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6311 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
4588ec20 JB |
6312 | exit (1); |
6313 | } | |
6314 | ||
0a125897 | 6315 | { |
6ed8eeff | 6316 | struct terminal *t; |
3224dac1 KL |
6317 | struct frame *f = XFRAME (selected_frame); |
6318 | ||
6319 | /* Open a display on the controlling tty. */ | |
6ed8eeff | 6320 | t = init_tty (0, terminal_type, 1); /* Errors are fatal. */ |
3224dac1 KL |
6321 | |
6322 | /* Convert the initial frame to use the new display. */ | |
b04f5ad2 | 6323 | if (f->output_method != output_initial) |
3224dac1 | 6324 | abort (); |
6ed8eeff KL |
6325 | f->output_method = t->type; |
6326 | f->terminal = t; | |
3224dac1 | 6327 | |
6ed8eeff | 6328 | t->reference_count++; |
7ac5dac9 EZ |
6329 | #ifdef MSDOS |
6330 | f->output_data.tty->display_info = &the_only_display_info; | |
6331 | #else | |
6332 | if (f->output_method == output_termcap) | |
6333 | create_tty_output (f); | |
6334 | #endif | |
6ed8eeff | 6335 | t->display_info.tty->top_frame = selected_frame; |
5b65d888 | 6336 | change_frame_size (XFRAME (selected_frame), |
6ed8eeff KL |
6337 | FrameRows (t->display_info.tty), |
6338 | FrameCols (t->display_info.tty), 0, 0, 1); | |
3224dac1 | 6339 | |
6ed8eeff KL |
6340 | /* Delete the initial terminal. */ |
6341 | if (--initial_terminal->reference_count == 0 | |
6342 | && initial_terminal->delete_terminal_hook) | |
6343 | (*initial_terminal->delete_terminal_hook) (initial_terminal); | |
2666355c KL |
6344 | |
6345 | /* Update frame parameters to reflect the new type. */ | |
6346 | Fmodify_frame_parameters | |
6347 | (selected_frame, Fcons (Fcons (Qtty_type, | |
6ed8eeff | 6348 | Ftty_type (selected_frame)), Qnil)); |
657ceaa0 EZ |
6349 | if (t->display_info.tty->name) |
6350 | Fmodify_frame_parameters (selected_frame, | |
6351 | Fcons (Fcons (Qtty, build_string (t->display_info.tty->name)), | |
6352 | Qnil)); | |
6353 | else | |
6354 | Fmodify_frame_parameters (selected_frame, Fcons (Fcons (Qtty, Qnil), | |
6355 | Qnil)); | |
0a125897 | 6356 | } |
3fc809e2 | 6357 | |
d86c299a | 6358 | { |
91fb7e1b | 6359 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6360 | int width = FRAME_TOTAL_COLS (sf); |
6361 | int height = FRAME_LINES (sf); | |
d86c299a | 6362 | |
5f5c8ee5 | 6363 | unsigned int total_glyphs = height * (width + 2) * sizeof (struct glyph); |
d86c299a | 6364 | |
5f5c8ee5 GM |
6365 | /* If these sizes are so big they cause overflow, just ignore the |
6366 | change. It's not clear what better we could do. */ | |
6367 | if (total_glyphs / sizeof (struct glyph) / height != width + 2) | |
1559a86d | 6368 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6369 | } |
6370 | ||
5f5c8ee5 | 6371 | adjust_frame_glyphs_initially (); |
91fb7e1b | 6372 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6373 | |
5f5c8ee5 GM |
6374 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ |
6375 | if (initialized | |
6376 | && !noninteractive | |
2246281f | 6377 | && NILP (Vinitial_window_system)) |
2d764c78 EZ |
6378 | { |
6379 | /* For the initial frame, we don't have any way of knowing what | |
6380 | are the foreground and background colors of the terminal. */ | |
6381 | struct frame *sf = SELECTED_FRAME(); | |
6382 | ||
f9d2fdc4 EZ |
6383 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
6384 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
6385 | call0 (intern ("tty-set-up-initial-frame-faces")); |
6386 | } | |
5f5c8ee5 GM |
6387 | } |
6388 | ||
6389 | ||
6390 | \f | |
6391 | /*********************************************************************** | |
6392 | Blinking cursor | |
6393 | ***********************************************************************/ | |
6394 | ||
c3f13540 | 6395 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 6396 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 6397 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
6398 | WINDOW nil means use the selected window. SHOW non-nil means |
6399 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 | 6400 | don't show a cursor. */) |
5842a27b | 6401 | (Lisp_Object window, Lisp_Object show) |
5f5c8ee5 | 6402 | { |
5f5c8ee5 GM |
6403 | /* Don't change cursor state while redisplaying. This could confuse |
6404 | output routines. */ | |
6405 | if (!redisplaying_p) | |
6406 | { | |
6407 | if (NILP (window)) | |
6408 | window = selected_window; | |
6409 | else | |
b7826503 | 6410 | CHECK_WINDOW (window); |
177c0ea7 | 6411 | |
5d7791b3 | 6412 | XWINDOW (window)->cursor_off_p = NILP (show); |
5f5c8ee5 GM |
6413 | } |
6414 | ||
6415 | return Qnil; | |
4588ec20 | 6416 | } |
5f5c8ee5 GM |
6417 | |
6418 | ||
5d7791b3 GM |
6419 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
6420 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 6421 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 | 6422 | WINDOW nil or omitted means report on the selected window. */) |
5842a27b | 6423 | (Lisp_Object window) |
5d7791b3 GM |
6424 | { |
6425 | struct window *w; | |
177c0ea7 | 6426 | |
5d7791b3 GM |
6427 | if (NILP (window)) |
6428 | window = selected_window; | |
6429 | else | |
b7826503 | 6430 | CHECK_WINDOW (window); |
177c0ea7 | 6431 | |
5d7791b3 | 6432 | w = XWINDOW (window); |
177c0ea7 | 6433 | return w->cursor_off_p ? Qnil : Qt; |
5d7791b3 GM |
6434 | } |
6435 | ||
87478b52 SM |
6436 | DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame, |
6437 | Slast_nonminibuf_frame, 0, 0, 0, | |
6438 | doc: /* Value is last nonminibuffer frame. */) | |
5842a27b | 6439 | (void) |
87478b52 | 6440 | { |
4958ed94 | 6441 | Lisp_Object frame = Qnil; |
87478b52 | 6442 | |
4958ed94 SM |
6443 | if (last_nonminibuf_frame) |
6444 | XSETFRAME (frame, last_nonminibuf_frame); | |
87478b52 SM |
6445 | |
6446 | return frame; | |
6447 | } | |
4588ec20 | 6448 | \f |
5f5c8ee5 GM |
6449 | /*********************************************************************** |
6450 | Initialization | |
6451 | ***********************************************************************/ | |
6452 | ||
dfcf069d | 6453 | void |
971de7fb | 6454 | syms_of_display (void) |
4588ec20 | 6455 | { |
502b9b64 | 6456 | defsubr (&Sredraw_frame); |
4588ec20 | 6457 | defsubr (&Sredraw_display); |
078b3696 | 6458 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
6459 | defsubr (&Sopen_termscript); |
6460 | defsubr (&Sding); | |
7ba07a1a | 6461 | defsubr (&Sredisplay); |
4588ec20 JB |
6462 | defsubr (&Ssleep_for); |
6463 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 6464 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 6465 | defsubr (&Sinternal_show_cursor_p); |
87478b52 | 6466 | defsubr (&Slast_nonminibuf_frame); |
4588ec20 | 6467 | |
2d5912c1 | 6468 | #if GLYPH_DEBUG |
9b0e97aa GM |
6469 | defsubr (&Sdump_redisplay_history); |
6470 | #endif | |
6471 | ||
d1dad759 | 6472 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
6473 | staticpro (&frame_and_buffer_state); |
6474 | ||
d67b4f80 | 6475 | Qdisplay_table = intern_c_string ("display-table"); |
9cda4f7c | 6476 | staticpro (&Qdisplay_table); |
d67b4f80 | 6477 | Qredisplay_dont_pause = intern_c_string ("redisplay-dont-pause"); |
e7067d00 | 6478 | staticpro (&Qredisplay_dont_pause); |
9cda4f7c | 6479 | |
29208e82 | 6480 | DEFVAR_INT ("baud-rate", baud_rate, |
bacf09b4 | 6481 | doc: /* *The output baud rate of the terminal. |
228299fa GM |
6482 | On most systems, changing this value will affect the amount of padding |
6483 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 6484 | |
29208e82 | 6485 | DEFVAR_BOOL ("inverse-video", inverse_video, |
bacf09b4 | 6486 | doc: /* *Non-nil means invert the entire frame display. |
228299fa | 6487 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 6488 | |
29208e82 | 6489 | DEFVAR_BOOL ("visible-bell", visible_bell, |
bacf09b4 | 6490 | doc: /* *Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
6491 | |
6492 | See also `ring-bell-function'. */); | |
177c0ea7 | 6493 | |
29208e82 | 6494 | DEFVAR_BOOL ("no-redraw-on-reenter", no_redraw_on_reenter, |
bacf09b4 | 6495 | doc: /* *Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
6496 | A non-nil value is useful if the terminal can automatically preserve |
6497 | Emacs's frame display when you reenter Emacs. | |
6498 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 6499 | |
29208e82 | 6500 | DEFVAR_LISP ("initial-window-system", Vinitial_window_system, |
2246281f | 6501 | doc: /* Name of the window system that Emacs uses for the first frame. |
89baa1df EZ |
6502 | The value is a symbol: |
6503 | nil for a termcap frame (a character-only terminal), | |
6504 | 'x' for an Emacs frame that is really an X window, | |
6505 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6506 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6507 | 'pc' for a direct-write MS-DOS frame. | |
6508 | ||
6509 | Use of this variable as a boolean is deprecated. Instead, | |
6510 | use `display-graphic-p' or any of the other `display-*-p' | |
6511 | predicates which report frame's specific UI-related capabilities. */); | |
177c0ea7 | 6512 | |
70b8d0a4 SM |
6513 | DEFVAR_KBOARD ("window-system", Vwindow_system, |
6514 | doc: /* Name of window system through which the selected frame is displayed. | |
89baa1df EZ |
6515 | The value is a symbol: |
6516 | nil for a termcap frame (a character-only terminal), | |
6517 | 'x' for an Emacs frame that is really an X window, | |
6518 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6519 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6520 | 'pc' for a direct-write MS-DOS frame. | |
6521 | ||
6522 | Use of this variable as a boolean is deprecated. Instead, | |
6523 | use `display-graphic-p' or any of the other `display-*-p' | |
6524 | predicates which report frame's specific UI-related capabilities. */); | |
70b8d0a4 | 6525 | |
29208e82 | 6526 | DEFVAR_LISP ("window-system-version", Vwindow_system_version, |
bacf09b4 | 6527 | doc: /* The version number of the window system in use. |
c22140f6 | 6528 | For X windows, this is 11. */); |
177c0ea7 | 6529 | |
29208e82 | 6530 | DEFVAR_BOOL ("cursor-in-echo-area", cursor_in_echo_area, |
bacf09b4 | 6531 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 6532 | |
29208e82 | 6533 | DEFVAR_LISP ("glyph-table", Vglyph_table, |
bacf09b4 | 6534 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
6535 | If not nil, this is a vector indexed by glyph code to define the glyph. |
6536 | Each element can be: | |
6537 | integer: a glyph code which this glyph is an alias for. | |
6538 | string: output this glyph using that string (not impl. in X windows). | |
6539 | nil: this glyph mod 524288 is the code of a character to output, | |
6540 | and this glyph / 524288 is the face number (see `face-id') to use | |
6541 | while outputting it. */); | |
4588ec20 JB |
6542 | Vglyph_table = Qnil; |
6543 | ||
29208e82 | 6544 | DEFVAR_LISP ("standard-display-table", Vstandard_display_table, |
bacf09b4 | 6545 | doc: /* Display table to use for buffers that specify none. |
228299fa | 6546 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
6547 | Vstandard_display_table = Qnil; |
6548 | ||
29208e82 | 6549 | DEFVAR_BOOL ("redisplay-dont-pause", redisplay_dont_pause, |
bacf09b4 | 6550 | doc: /* *Non-nil means update isn't paused when input is detected. */); |
5f5c8ee5 GM |
6551 | redisplay_dont_pause = 0; |
6552 | ||
d012c62b | 6553 | #if PERIODIC_PREEMPTION_CHECKING |
29208e82 | 6554 | DEFVAR_LISP ("redisplay-preemption-period", Vredisplay_preemption_period, |
d012c62b KS |
6555 | doc: /* *The period in seconds between checking for input during redisplay. |
6556 | If input is detected, redisplay is pre-empted, and the input is processed. | |
6557 | If nil, never pre-empt redisplay. */); | |
6558 | Vredisplay_preemption_period = make_float (0.10); | |
6559 | #endif | |
6560 | ||
4588ec20 JB |
6561 | #ifdef CANNOT_DUMP |
6562 | if (noninteractive) | |
6563 | #endif | |
6564 | { | |
2246281f | 6565 | Vinitial_window_system = Qnil; |
4588ec20 JB |
6566 | Vwindow_system_version = Qnil; |
6567 | } | |
6568 | } |