Commit | Line | Data |
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4588ec20 | 1 | /* Updating of data structures for redisplay. |
9311dcff GM |
2 | |
3 | Copyright (C) 1985-1988, 1993-1995, 1997-2012 Free Software Foundation, Inc. | |
4588ec20 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
9ec0b715 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
4588ec20 | 8 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
4588ec20 JB |
11 | |
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
4588ec20 | 19 | |
18160b98 | 20 | #include <config.h> |
68c45bf0 | 21 | #include <signal.h> |
565620a5 | 22 | #include <stdio.h> |
4588ec20 | 23 | #include <ctype.h> |
d7306fe6 | 24 | #include <setjmp.h> |
dfcf069d | 25 | #include <unistd.h> |
dfcf069d | 26 | |
47099d6f | 27 | #include "lisp.h" |
4588ec20 JB |
28 | #include "termchar.h" |
29 | #include "termopts.h" | |
a0879520 | 30 | /* cm.h must come after dispextern.h on Windows. */ |
fd2e066a GV |
31 | #include "dispextern.h" |
32 | #include "cm.h" | |
4588ec20 | 33 | #include "buffer.h" |
83be827a | 34 | #include "character.h" |
d43721a2 | 35 | #include "keyboard.h" |
502b9b64 | 36 | #include "frame.h" |
428a555e | 37 | #include "termhooks.h" |
4588ec20 JB |
38 | #include "window.h" |
39 | #include "commands.h" | |
40 | #include "disptab.h" | |
41 | #include "indent.h" | |
d169fe39 | 42 | #include "intervals.h" |
97cf50e7 | 43 | #include "blockinput.h" |
dfcf069d | 44 | #include "process.h" |
4588ec20 | 45 | |
58b2bb63 | 46 | #include "syssignal.h" |
a41f8bed | 47 | |
4588ec20 JB |
48 | #ifdef HAVE_X_WINDOWS |
49 | #include "xterm.h" | |
5f5c8ee5 | 50 | #endif /* HAVE_X_WINDOWS */ |
4588ec20 | 51 | |
fd2e066a GV |
52 | #ifdef HAVE_NTGUI |
53 | #include "w32term.h" | |
54 | #endif /* HAVE_NTGUI */ | |
55 | ||
edfda783 AR |
56 | #ifdef HAVE_NS |
57 | #include "nsterm.h" | |
58 | #endif | |
59 | ||
5f5c8ee5 | 60 | /* Include systime.h after xterm.h to avoid double inclusion of time.h. */ |
6cbd1643 | 61 | |
5f5c8ee5 | 62 | #include "systime.h" |
3883a901 RS |
63 | #include <errno.h> |
64 | ||
4588ec20 | 65 | /* Get number of chars of output now in the buffer of a stdio stream. |
5a5fa834 | 66 | This ought to be built in stdio, but it isn't. Some s- files |
5f5c8ee5 GM |
67 | override this because their stdio internals differ. */ |
68 | ||
e3271ae5 | 69 | #ifdef __GNU_LIBRARY__ |
5f5c8ee5 GM |
70 | |
71 | /* The s- file might have overridden the definition with one that | |
72 | works for the system's C library. But we are using the GNU C | |
73 | library, so this is the right definition for every system. */ | |
74 | ||
3883a901 RS |
75 | #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT |
76 | #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT | |
77 | #else | |
cb5558ff | 78 | #undef PENDING_OUTPUT_COUNT |
e3271ae5 | 79 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer) |
3883a901 RS |
80 | #endif |
81 | #else /* not __GNU_LIBRARY__ */ | |
68c45bf0 PE |
82 | #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING |
83 | #include <stdio_ext.h> | |
84 | #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE) | |
85 | #endif | |
cb5558ff | 86 | #ifndef PENDING_OUTPUT_COUNT |
4588ec20 JB |
87 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) |
88 | #endif | |
5f5c8ee5 GM |
89 | #endif /* not __GNU_LIBRARY__ */ |
90 | ||
9311dcff | 91 | #if defined (HAVE_TERM_H) && defined (GNU_LINUX) |
fa0ec9f4 DL |
92 | #include <term.h> /* for tgetent */ |
93 | #endif | |
5f5c8ee5 GM |
94 | \f |
95 | /* Structure to pass dimensions around. Used for character bounding | |
96 | boxes, glyph matrix dimensions and alike. */ | |
97 | ||
98 | struct dim | |
99 | { | |
100 | int width; | |
101 | int height; | |
102 | }; | |
103 | ||
104 | \f | |
105 | /* Function prototypes. */ | |
106 | ||
f57e2426 | 107 | static void update_frame_line (struct frame *, int); |
2f7c71a1 AS |
108 | static int required_matrix_height (struct window *); |
109 | static int required_matrix_width (struct window *); | |
f57e2426 | 110 | static void adjust_frame_glyphs (struct frame *); |
f57e2426 | 111 | static void change_frame_size_1 (struct frame *, int, int, int, int, int); |
d311d28c | 112 | static void increment_row_positions (struct glyph_row *, ptrdiff_t, ptrdiff_t); |
f57e2426 J |
113 | static void fill_up_frame_row_with_spaces (struct glyph_row *, int); |
114 | static void build_frame_matrix_from_window_tree (struct glyph_matrix *, | |
115 | struct window *); | |
116 | static void build_frame_matrix_from_leaf_window (struct glyph_matrix *, | |
117 | struct window *); | |
f57e2426 J |
118 | static void adjust_frame_message_buffer (struct frame *); |
119 | static void adjust_decode_mode_spec_buffer (struct frame *); | |
120 | static void fill_up_glyph_row_with_spaces (struct glyph_row *); | |
f57e2426 J |
121 | static void clear_window_matrices (struct window *, int); |
122 | static void fill_up_glyph_row_area_with_spaces (struct glyph_row *, int); | |
123 | static int scrolling_window (struct window *, int); | |
124 | static int update_window_line (struct window *, int, int *); | |
f57e2426 | 125 | static void mirror_make_current (struct window *, int); |
b96fd3e8 | 126 | #if GLYPH_DEBUG |
f57e2426 J |
127 | static void check_matrix_pointers (struct glyph_matrix *, |
128 | struct glyph_matrix *); | |
b96fd3e8 | 129 | #endif |
f57e2426 J |
130 | static void mirror_line_dance (struct window *, int, int, int *, char *); |
131 | static int update_window_tree (struct window *, int); | |
132 | static int update_window (struct window *, int); | |
133 | static int update_frame_1 (struct frame *, int, int); | |
5bf46f05 | 134 | static int scrolling (struct frame *); |
f57e2426 | 135 | static void set_window_cursor_after_update (struct window *); |
f57e2426 J |
136 | static void adjust_frame_glyphs_for_window_redisplay (struct frame *); |
137 | static void adjust_frame_glyphs_for_frame_redisplay (struct frame *); | |
5f5c8ee5 | 138 | |
5f5c8ee5 | 139 | \f |
d012c62b KS |
140 | /* Define PERIODIC_PREEMPTION_CHECKING to 1, if micro-second timers |
141 | are supported, so we can check for input during redisplay at | |
142 | regular intervals. */ | |
143 | #ifdef EMACS_HAS_USECS | |
144 | #define PERIODIC_PREEMPTION_CHECKING 1 | |
145 | #else | |
146 | #define PERIODIC_PREEMPTION_CHECKING 0 | |
147 | #endif | |
148 | ||
149 | #if PERIODIC_PREEMPTION_CHECKING | |
150 | ||
d012c62b KS |
151 | /* Redisplay preemption timers. */ |
152 | ||
153 | static EMACS_TIME preemption_period; | |
154 | static EMACS_TIME preemption_next_check; | |
155 | ||
156 | #endif | |
157 | ||
a41f8bed | 158 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 159 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 160 | |
502b9b64 | 161 | int frame_garbaged; |
4588ec20 | 162 | |
5f5c8ee5 | 163 | /* Nonzero means last display completed. Zero means it was preempted. */ |
4588ec20 JB |
164 | |
165 | int display_completed; | |
166 | ||
e7067d00 | 167 | Lisp_Object Qdisplay_table, Qredisplay_dont_pause; |
5f5c8ee5 | 168 | |
4588ec20 | 169 | \f |
5f5c8ee5 | 170 | /* The currently selected frame. In a single-frame version, this |
91fb7e1b | 171 | variable always equals the_only_frame. */ |
4588ec20 | 172 | |
91fb7e1b | 173 | Lisp_Object selected_frame; |
4588ec20 | 174 | |
5f5c8ee5 | 175 | /* A frame which is not just a mini-buffer, or 0 if there are no such |
502b9b64 | 176 | frames. This is usually the most recent such frame that was |
87485d6f MW |
177 | selected. In a single-frame version, this variable always holds |
178 | the address of the_only_frame. */ | |
4588ec20 | 179 | |
5f5c8ee5 | 180 | struct frame *last_nonminibuf_frame; |
d52bad65 | 181 | |
5f5c8ee5 | 182 | /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 183 | |
5bf46f05 | 184 | static int delayed_size_change; |
4588ec20 | 185 | |
5f5c8ee5 | 186 | /* 1 means glyph initialization has been completed at startup. */ |
4588ec20 | 187 | |
5f5c8ee5 | 188 | static int glyphs_initialized_initially_p; |
4588ec20 | 189 | |
5f5c8ee5 | 190 | /* Updated window if != 0. Set by update_window. */ |
4588ec20 | 191 | |
5f5c8ee5 | 192 | struct window *updated_window; |
4588ec20 | 193 | |
5f5c8ee5 | 194 | /* Glyph row updated in update_window_line, and area that is updated. */ |
4588ec20 | 195 | |
5f5c8ee5 GM |
196 | struct glyph_row *updated_row; |
197 | int updated_area; | |
4588ec20 | 198 | |
5f5c8ee5 | 199 | /* A glyph for a space. */ |
4588ec20 | 200 | |
5f5c8ee5 | 201 | struct glyph space_glyph; |
4588ec20 | 202 | |
5f5c8ee5 GM |
203 | /* Counts of allocated structures. These counts serve to diagnose |
204 | memory leaks and double frees. */ | |
4588ec20 | 205 | |
5bf46f05 PE |
206 | static int glyph_matrix_count; |
207 | static int glyph_pool_count; | |
4588ec20 | 208 | |
5f5c8ee5 GM |
209 | /* If non-null, the frame whose frame matrices are manipulated. If |
210 | null, window matrices are worked on. */ | |
4588ec20 | 211 | |
5f5c8ee5 | 212 | static struct frame *frame_matrix_frame; |
4588ec20 | 213 | |
5f5c8ee5 GM |
214 | /* Non-zero means that fonts have been loaded since the last glyph |
215 | matrix adjustments. Redisplay must stop, and glyph matrices must | |
216 | be adjusted when this flag becomes non-zero during display. The | |
217 | reason fonts can be loaded so late is that fonts of fontsets are | |
3aa9f0c4 KH |
218 | loaded on demand. Another reason is that a line contains many |
219 | characters displayed by zero width or very narrow glyphs of | |
220 | variable-width fonts. */ | |
836d2cde | 221 | |
5f5c8ee5 | 222 | int fonts_changed_p; |
836d2cde | 223 | |
177c0ea7 | 224 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 225 | This may only be used for terminal frames. */ |
836d2cde | 226 | |
5f5c8ee5 | 227 | #if GLYPH_DEBUG |
4588ec20 | 228 | |
f57e2426 J |
229 | static int window_to_frame_vpos (struct window *, int); |
230 | static int window_to_frame_hpos (struct window *, int); | |
5f5c8ee5 GM |
231 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) |
232 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 233 | |
9b0e97aa GM |
234 | /* One element of the ring buffer containing redisplay history |
235 | information. */ | |
236 | ||
237 | struct redisplay_history | |
238 | { | |
239 | char trace[512 + 100]; | |
240 | }; | |
241 | ||
242 | /* The size of the history buffer. */ | |
243 | ||
244 | #define REDISPLAY_HISTORY_SIZE 30 | |
245 | ||
246 | /* The redisplay history buffer. */ | |
247 | ||
248 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
249 | ||
250 | /* Next free entry in redisplay_history. */ | |
251 | ||
252 | static int history_idx; | |
253 | ||
254 | /* A tick that's incremented each time something is added to the | |
255 | history. */ | |
256 | ||
dfd153ae | 257 | static uprintmax_t history_tick; |
9b0e97aa | 258 | |
f57e2426 | 259 | static void add_frame_display_history (struct frame *, int); |
6a8aec41 | 260 | \f |
9b0e97aa GM |
261 | /* Add to the redisplay history how window W has been displayed. |
262 | MSG is a trace containing the information how W's glyph matrix | |
153a073c | 263 | has been constructed. PAUSED_P non-zero means that the update |
9b0e97aa GM |
264 | has been interrupted for pending input. */ |
265 | ||
266 | static void | |
c56e0fd5 | 267 | add_window_display_history (struct window *w, const char *msg, int paused_p) |
9b0e97aa GM |
268 | { |
269 | char *buf; | |
177c0ea7 | 270 | |
9b0e97aa GM |
271 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
272 | history_idx = 0; | |
273 | buf = redisplay_history[history_idx].trace; | |
274 | ++history_idx; | |
177c0ea7 | 275 | |
8666506e PE |
276 | snprintf (buf, sizeof redisplay_history[0].trace, |
277 | "%"pMu": window %p (`%s')%s\n%s", | |
278 | history_tick++, | |
279 | w, | |
280 | ((BUFFERP (w->buffer) | |
281 | && STRINGP (BVAR (XBUFFER (w->buffer), name))) | |
282 | ? SSDATA (BVAR (XBUFFER (w->buffer), name)) | |
283 | : "???"), | |
284 | paused_p ? " ***paused***" : "", | |
285 | msg); | |
9b0e97aa GM |
286 | } |
287 | ||
288 | ||
289 | /* Add to the redisplay history that frame F has been displayed. | |
290 | PAUSED_P non-zero means that the update has been interrupted for | |
291 | pending input. */ | |
292 | ||
293 | static void | |
59fc5cf9 | 294 | add_frame_display_history (struct frame *f, int paused_p) |
9b0e97aa GM |
295 | { |
296 | char *buf; | |
177c0ea7 | 297 | |
9b0e97aa GM |
298 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
299 | history_idx = 0; | |
300 | buf = redisplay_history[history_idx].trace; | |
301 | ++history_idx; | |
177c0ea7 | 302 | |
dfd153ae | 303 | sprintf (buf, "%"pMu": update frame %p%s", |
9b0e97aa GM |
304 | history_tick++, |
305 | f, paused_p ? " ***paused***" : ""); | |
306 | } | |
307 | ||
308 | ||
a7ca3326 | 309 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, |
9b0e97aa | 310 | Sdump_redisplay_history, 0, 0, "", |
7ee72033 | 311 | doc: /* Dump redisplay history to stderr. */) |
5842a27b | 312 | (void) |
9b0e97aa GM |
313 | { |
314 | int i; | |
315 | ||
316 | for (i = history_idx - 1; i != history_idx; --i) | |
317 | { | |
318 | if (i < 0) | |
319 | i = REDISPLAY_HISTORY_SIZE - 1; | |
320 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
321 | } | |
322 | ||
323 | return Qnil; | |
324 | } | |
325 | ||
326 | ||
5f5c8ee5 | 327 | #else /* GLYPH_DEBUG == 0 */ |
4588ec20 | 328 | |
7df02016 KS |
329 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
330 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 331 | |
5f5c8ee5 | 332 | #endif /* GLYPH_DEBUG == 0 */ |
4588ec20 | 333 | |
4588ec20 | 334 | |
9e4bf381 PE |
335 | #if (defined PROFILING \ |
336 | && (defined __FreeBSD__ || defined GNU_LINUX || defined __MINGW32__) \ | |
337 | && !HAVE___EXECUTABLE_START) | |
338 | /* This function comes first in the Emacs executable and is used only | |
339 | to estimate the text start for profiling. */ | |
4588ec20 | 340 | void |
9e4bf381 | 341 | __executable_start (void) |
4588ec20 | 342 | { |
72af86bd | 343 | abort (); |
177c0ea7 | 344 | } |
72af86bd | 345 | #endif |
5f5c8ee5 GM |
346 | \f |
347 | /*********************************************************************** | |
348 | Glyph Matrices | |
349 | ***********************************************************************/ | |
350 | ||
351 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
352 | pool from which memory for the matrix should be allocated, or null | |
353 | for window-based redisplay where no glyph pools are used. The | |
354 | member `pool' of the glyph matrix structure returned is set to | |
355 | POOL, the structure is otherwise zeroed. */ | |
356 | ||
5bf46f05 | 357 | static struct glyph_matrix * |
971de7fb | 358 | new_glyph_matrix (struct glyph_pool *pool) |
4588ec20 | 359 | { |
5f5c8ee5 GM |
360 | struct glyph_matrix *result; |
361 | ||
362 | /* Allocate and clear. */ | |
363 | result = (struct glyph_matrix *) xmalloc (sizeof *result); | |
72af86bd | 364 | memset (result, 0, sizeof *result); |
4588ec20 | 365 | |
5f5c8ee5 GM |
366 | /* Increment number of allocated matrices. This count is used |
367 | to detect memory leaks. */ | |
368 | ++glyph_matrix_count; | |
4588ec20 | 369 | |
5f5c8ee5 GM |
370 | /* Set pool and return. */ |
371 | result->pool = pool; | |
372 | return result; | |
4588ec20 JB |
373 | } |
374 | ||
4588ec20 | 375 | |
5f5c8ee5 GM |
376 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
377 | ||
378 | The global counter glyph_matrix_count is decremented when a matrix | |
379 | is freed. If the count gets negative, more structures were freed | |
380 | than allocated, i.e. one matrix was freed more than once or a bogus | |
381 | pointer was passed to this function. | |
177c0ea7 | 382 | |
5f5c8ee5 GM |
383 | If MATRIX->pool is null, this means that the matrix manages its own |
384 | glyph memory---this is done for matrices on X frames. Freeing the | |
385 | matrix also frees the glyph memory in this case. */ | |
386 | ||
387 | static void | |
971de7fb | 388 | free_glyph_matrix (struct glyph_matrix *matrix) |
4588ec20 | 389 | { |
5f5c8ee5 GM |
390 | if (matrix) |
391 | { | |
392 | int i; | |
393 | ||
394 | /* Detect the case that more matrices are freed than were | |
395 | allocated. */ | |
396 | if (--glyph_matrix_count < 0) | |
397 | abort (); | |
398 | ||
399 | /* Free glyph memory if MATRIX owns it. */ | |
400 | if (matrix->pool == NULL) | |
401 | for (i = 0; i < matrix->rows_allocated; ++i) | |
402 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 403 | |
5f5c8ee5 GM |
404 | /* Free row structures and the matrix itself. */ |
405 | xfree (matrix->rows); | |
406 | xfree (matrix); | |
407 | } | |
408 | } | |
4588ec20 | 409 | |
4588ec20 | 410 | |
5f5c8ee5 GM |
411 | /* Return the number of glyphs to reserve for a marginal area of |
412 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
413 | display line of window W. MARGIN gives the width of the marginal | |
414 | area in canonical character units. MARGIN should be an integer | |
415 | or a float. */ | |
416 | ||
417 | static int | |
971de7fb | 418 | margin_glyphs_to_reserve (struct window *w, int total_glyphs, Lisp_Object margin) |
5f5c8ee5 GM |
419 | { |
420 | int n; | |
4588ec20 | 421 | |
5f5c8ee5 | 422 | if (NUMBERP (margin)) |
4588ec20 | 423 | { |
7df02016 | 424 | int width = XFASTINT (w->total_cols); |
5f5c8ee5 GM |
425 | double d = max (0, XFLOATINT (margin)); |
426 | d = min (width / 2 - 1, d); | |
35ec832e | 427 | n = (int) ((double) total_glyphs / width * d); |
5f5c8ee5 GM |
428 | } |
429 | else | |
430 | n = 0; | |
431 | ||
432 | return n; | |
433 | } | |
434 | ||
7a7270dd EZ |
435 | #if XASSERTS |
436 | /* Return non-zero if ROW's hash value is correct, zero if not. */ | |
7430c2a1 | 437 | int |
7a7270dd EZ |
438 | verify_row_hash (struct glyph_row *row) |
439 | { | |
015137db | 440 | return row->hash == row_hash (row); |
7a7270dd EZ |
441 | } |
442 | #endif | |
4588ec20 | 443 | |
5f5c8ee5 GM |
444 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
445 | window sizes. | |
4588ec20 | 446 | |
5f5c8ee5 GM |
447 | W is null if the function is called for a frame glyph matrix. |
448 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
449 | indices of the first column and row of MATRIX within the frame | |
450 | matrix, if such a matrix exists. They are zero for purely | |
451 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 452 | |
5f5c8ee5 GM |
453 | In window-based redisplay, where no frame matrices exist, glyph |
454 | matrices manage their own glyph storage. Otherwise, they allocate | |
455 | storage from a common frame glyph pool which can be found in | |
456 | MATRIX->pool. | |
23b0200c | 457 | |
5f5c8ee5 GM |
458 | The reason for this memory management strategy is to avoid complete |
459 | frame redraws if possible. When we allocate from a common pool, a | |
460 | change of the location or size of a sub-matrix within the pool | |
461 | requires a complete redisplay of the frame because we cannot easily | |
462 | make sure that the current matrices of all windows still agree with | |
463 | what is displayed on the screen. While this is usually fast, it | |
464 | leads to screen flickering. */ | |
23b0200c | 465 | |
5f5c8ee5 | 466 | static void |
971de7fb | 467 | adjust_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int x, int y, struct dim dim) |
5f5c8ee5 GM |
468 | { |
469 | int i; | |
470 | int new_rows; | |
471 | int marginal_areas_changed_p = 0; | |
045dee35 GM |
472 | int header_line_changed_p = 0; |
473 | int header_line_p = 0; | |
5f5c8ee5 | 474 | int left = -1, right = -1; |
ca8a12a7 | 475 | int window_width = -1, window_height = -1; |
5f5c8ee5 | 476 | |
6b61353c KH |
477 | /* See if W had a header line that has disappeared now, or vice versa. |
478 | Get W's size. */ | |
5f5c8ee5 GM |
479 | if (w) |
480 | { | |
6b61353c KH |
481 | window_box (w, -1, 0, 0, &window_width, &window_height); |
482 | ||
045dee35 GM |
483 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
484 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 485 | } |
045dee35 | 486 | matrix->header_line_p = header_line_p; |
23b0200c | 487 | |
6b61353c KH |
488 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
489 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
490 | haven't changed. This optimization is important because preserving |
491 | the matrix means preventing redisplay. */ | |
492 | if (matrix->pool == NULL) | |
493 | { | |
7df02016 KS |
494 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
495 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
5f5c8ee5 GM |
496 | xassert (left >= 0 && right >= 0); |
497 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs | |
498 | || right != matrix->right_margin_glyphs); | |
499 | ||
500 | if (!marginal_areas_changed_p | |
501 | && !fonts_changed_p | |
045dee35 | 502 | && !header_line_changed_p |
7df02016 KS |
503 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
504 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
505 | && matrix->window_height == window_height |
506 | && matrix->window_vscroll == w->vscroll | |
507 | && matrix->window_width == window_width) | |
508 | return; | |
509 | } | |
177c0ea7 | 510 | |
5f5c8ee5 GM |
511 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
512 | if (matrix->rows_allocated < dim.height) | |
513 | { | |
0065d054 | 514 | int old_alloc = matrix->rows_allocated; |
5f5c8ee5 | 515 | new_rows = dim.height - matrix->rows_allocated; |
0065d054 PE |
516 | matrix->rows = xpalloc (matrix->rows, &matrix->rows_allocated, |
517 | new_rows, INT_MAX, sizeof *matrix->rows); | |
518 | memset (matrix->rows + old_alloc, 0, | |
519 | (matrix->rows_allocated - old_alloc) * sizeof *matrix->rows); | |
5f5c8ee5 GM |
520 | } |
521 | else | |
522 | new_rows = 0; | |
60a8948a | 523 | |
5f5c8ee5 GM |
524 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
525 | on a frame not using window-based redisplay. Set up pointers for | |
526 | each row into the glyph pool. */ | |
527 | if (matrix->pool) | |
528 | { | |
529 | xassert (matrix->pool->glyphs); | |
177c0ea7 | 530 | |
5f5c8ee5 | 531 | if (w) |
60a8948a | 532 | { |
5f5c8ee5 | 533 | left = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 534 | w->left_margin_cols); |
5f5c8ee5 | 535 | right = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 536 | w->right_margin_cols); |
60a8948a | 537 | } |
5f5c8ee5 GM |
538 | else |
539 | left = right = 0; | |
177c0ea7 | 540 | |
5f5c8ee5 | 541 | for (i = 0; i < dim.height; ++i) |
60a8948a | 542 | { |
5f5c8ee5 | 543 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
544 | |
545 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
546 | = (matrix->pool->glyphs |
547 | + (y + i) * matrix->pool->ncolumns | |
548 | + x); | |
177c0ea7 | 549 | |
5f5c8ee5 GM |
550 | if (w == NULL |
551 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 552 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
553 | { |
554 | row->glyphs[TEXT_AREA] | |
555 | = row->glyphs[LEFT_MARGIN_AREA]; | |
556 | row->glyphs[RIGHT_MARGIN_AREA] | |
557 | = row->glyphs[TEXT_AREA] + dim.width; | |
558 | row->glyphs[LAST_AREA] | |
559 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
560 | } | |
561 | else | |
562 | { | |
563 | row->glyphs[TEXT_AREA] | |
564 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
565 | row->glyphs[RIGHT_MARGIN_AREA] | |
566 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
567 | row->glyphs[LAST_AREA] | |
568 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
569 | } | |
60a8948a | 570 | } |
177c0ea7 | 571 | |
5f5c8ee5 GM |
572 | matrix->left_margin_glyphs = left; |
573 | matrix->right_margin_glyphs = right; | |
574 | } | |
575 | else | |
576 | { | |
577 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
6b61353c KH |
578 | its own memory. It is a window matrix for window-based redisplay. |
579 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
580 | if (dim.width > matrix->matrix_w |
581 | || new_rows | |
045dee35 | 582 | || header_line_changed_p |
5f5c8ee5 | 583 | || marginal_areas_changed_p) |
4588ec20 | 584 | { |
5f5c8ee5 GM |
585 | struct glyph_row *row = matrix->rows; |
586 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 587 | |
5f5c8ee5 GM |
588 | while (row < end) |
589 | { | |
590 | row->glyphs[LEFT_MARGIN_AREA] | |
0065d054 PE |
591 | = xnrealloc (row->glyphs[LEFT_MARGIN_AREA], |
592 | dim.width, sizeof (struct glyph)); | |
177c0ea7 | 593 | |
5f5c8ee5 GM |
594 | /* The mode line never has marginal areas. */ |
595 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 596 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
597 | { |
598 | row->glyphs[TEXT_AREA] | |
599 | = row->glyphs[LEFT_MARGIN_AREA]; | |
600 | row->glyphs[RIGHT_MARGIN_AREA] | |
601 | = row->glyphs[TEXT_AREA] + dim.width; | |
602 | row->glyphs[LAST_AREA] | |
603 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
604 | } | |
605 | else | |
606 | { | |
607 | row->glyphs[TEXT_AREA] | |
608 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
609 | row->glyphs[RIGHT_MARGIN_AREA] | |
610 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
611 | row->glyphs[LAST_AREA] | |
612 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
613 | } | |
614 | ++row; | |
615 | } | |
4588ec20 JB |
616 | } |
617 | ||
5f5c8ee5 GM |
618 | xassert (left >= 0 && right >= 0); |
619 | matrix->left_margin_glyphs = left; | |
620 | matrix->right_margin_glyphs = right; | |
621 | } | |
177c0ea7 | 622 | |
5f5c8ee5 GM |
623 | /* Number of rows to be used by MATRIX. */ |
624 | matrix->nrows = dim.height; | |
3ed36514 | 625 | xassert (matrix->nrows >= 0); |
5f5c8ee5 | 626 | |
b7b20fbd | 627 | if (w) |
5f5c8ee5 | 628 | { |
b7b20fbd | 629 | if (matrix == w->current_matrix) |
4588ec20 | 630 | { |
b7b20fbd GM |
631 | /* Mark rows in a current matrix of a window as not having |
632 | valid contents. It's important to not do this for | |
633 | desired matrices. When Emacs starts, it may already be | |
634 | building desired matrices when this function runs. */ | |
635 | if (window_width < 0) | |
636 | window_width = window_box_width (w, -1); | |
177c0ea7 | 637 | |
b7b20fbd GM |
638 | /* Optimize the case that only the height has changed (C-x 2, |
639 | upper window). Invalidate all rows that are no longer part | |
640 | of the window. */ | |
641 | if (!marginal_areas_changed_p | |
73d75a62 GM |
642 | && !header_line_changed_p |
643 | && new_rows == 0 | |
644 | && dim.width == matrix->matrix_w | |
7df02016 KS |
645 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
646 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 647 | && matrix->window_width == window_width) |
b7b20fbd | 648 | { |
dd42b31a GM |
649 | /* Find the last row in the window. */ |
650 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
651 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
652 | { | |
26447967 | 653 | ++i; |
dd42b31a GM |
654 | break; |
655 | } | |
b7b20fbd GM |
656 | |
657 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 658 | are invalidated below. */ |
b7b20fbd GM |
659 | if (INTEGERP (w->window_end_vpos) |
660 | && XFASTINT (w->window_end_vpos) >= i) | |
661 | w->window_end_valid = Qnil; | |
177c0ea7 | 662 | |
b7b20fbd GM |
663 | while (i < matrix->nrows) |
664 | matrix->rows[i++].enabled_p = 0; | |
665 | } | |
666 | else | |
667 | { | |
668 | for (i = 0; i < matrix->nrows; ++i) | |
669 | matrix->rows[i].enabled_p = 0; | |
670 | } | |
5f5c8ee5 | 671 | } |
b7b20fbd | 672 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 673 | { |
b7b20fbd GM |
674 | /* Rows in desired matrices always have to be cleared; |
675 | redisplay expects this is the case when it runs, so it | |
676 | had better be the case when we adjust matrices between | |
677 | redisplays. */ | |
5f5c8ee5 GM |
678 | for (i = 0; i < matrix->nrows; ++i) |
679 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 680 | } |
4588ec20 | 681 | } |
177c0ea7 JB |
682 | |
683 | ||
5f5c8ee5 GM |
684 | /* Remember last values to be able to optimize frame redraws. */ |
685 | matrix->matrix_x = x; | |
686 | matrix->matrix_y = y; | |
687 | matrix->matrix_w = dim.width; | |
688 | matrix->matrix_h = dim.height; | |
689 | ||
690 | /* Record the top y location and height of W at the time the matrix | |
691 | was last adjusted. This is used to optimize redisplay above. */ | |
692 | if (w) | |
4588ec20 | 693 | { |
7df02016 KS |
694 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
695 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
696 | matrix->window_height = window_height; |
697 | matrix->window_width = window_width; | |
698 | matrix->window_vscroll = w->vscroll; | |
699 | } | |
700 | } | |
4588ec20 | 701 | |
4588ec20 | 702 | |
5f5c8ee5 GM |
703 | /* Reverse the contents of rows in MATRIX between START and END. The |
704 | contents of the row at END - 1 end up at START, END - 2 at START + | |
705 | 1 etc. This is part of the implementation of rotate_matrix (see | |
706 | below). */ | |
d52bad65 | 707 | |
5f5c8ee5 | 708 | static void |
971de7fb | 709 | reverse_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 GM |
710 | { |
711 | int i, j; | |
23b0200c | 712 | |
5f5c8ee5 GM |
713 | for (i = start, j = end - 1; i < j; ++i, --j) |
714 | { | |
715 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
716 | initialization. */ | |
717 | struct glyph_row temp; | |
718 | temp = matrix->rows[i]; | |
719 | matrix->rows[i] = matrix->rows[j]; | |
720 | matrix->rows[j] = temp; | |
721 | } | |
722 | } | |
23b0200c | 723 | |
23b0200c | 724 | |
5f5c8ee5 GM |
725 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
726 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
727 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
728 | row structures are moved around). | |
60a8948a | 729 | |
5f5c8ee5 GM |
730 | The algorithm used for rotating the vector was, I believe, first |
731 | described by Kernighan. See the vector R as consisting of two | |
732 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
733 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
734 | and reverse the result to get (ArBr)r which is BA. Similar for | |
735 | rotating right. */ | |
736 | ||
737 | void | |
971de7fb | 738 | rotate_matrix (struct glyph_matrix *matrix, int first, int last, int by) |
5f5c8ee5 GM |
739 | { |
740 | if (by < 0) | |
741 | { | |
742 | /* Up (rotate left, i.e. towards lower indices). */ | |
743 | by = -by; | |
744 | reverse_rows (matrix, first, first + by); | |
745 | reverse_rows (matrix, first + by, last); | |
746 | reverse_rows (matrix, first, last); | |
747 | } | |
748 | else if (by > 0) | |
749 | { | |
750 | /* Down (rotate right, i.e. towards higher indices). */ | |
751 | reverse_rows (matrix, last - by, last); | |
752 | reverse_rows (matrix, first, last - by); | |
753 | reverse_rows (matrix, first, last); | |
754 | } | |
755 | } | |
756 | ||
757 | ||
758 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
759 | with indices START <= index < END. Increment positions by DELTA/ | |
760 | DELTA_BYTES. */ | |
761 | ||
762 | void | |
ace1712c | 763 | increment_matrix_positions (struct glyph_matrix *matrix, int start, int end, |
d311d28c | 764 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
765 | { |
766 | /* Check that START and END are reasonable values. */ | |
767 | xassert (start >= 0 && start <= matrix->nrows); | |
768 | xassert (end >= 0 && end <= matrix->nrows); | |
769 | xassert (start <= end); | |
770 | ||
771 | for (; start < end; ++start) | |
86c11ba1 | 772 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
773 | } |
774 | ||
775 | ||
776 | /* Enable a range of rows in glyph matrix MATRIX. START and END are | |
777 | the row indices of the first and last + 1 row to enable. If | |
778 | ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */ | |
779 | ||
780 | void | |
971de7fb | 781 | enable_glyph_matrix_rows (struct glyph_matrix *matrix, int start, int end, int enabled_p) |
5f5c8ee5 | 782 | { |
3ed36514 GM |
783 | xassert (start <= end); |
784 | xassert (start >= 0 && start < matrix->nrows); | |
785 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 786 | |
5f5c8ee5 GM |
787 | for (; start < end; ++start) |
788 | matrix->rows[start].enabled_p = enabled_p != 0; | |
789 | } | |
790 | ||
791 | ||
792 | /* Clear MATRIX. | |
793 | ||
794 | This empties all rows in MATRIX by setting the enabled_p flag for | |
795 | all rows of the matrix to zero. The function prepare_desired_row | |
796 | will eventually really clear a row when it sees one with a zero | |
797 | enabled_p flag. | |
798 | ||
799 | Resets update hints to defaults value. The only update hint | |
800 | currently present is the flag MATRIX->no_scrolling_p. */ | |
801 | ||
802 | void | |
971de7fb | 803 | clear_glyph_matrix (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
804 | { |
805 | if (matrix) | |
806 | { | |
807 | enable_glyph_matrix_rows (matrix, 0, matrix->nrows, 0); | |
808 | matrix->no_scrolling_p = 0; | |
809 | } | |
810 | } | |
177c0ea7 | 811 | |
5f5c8ee5 GM |
812 | |
813 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
814 | Increment y-positions in glyph rows between START and END by DY, | |
815 | and recompute their visible height. */ | |
816 | ||
817 | void | |
971de7fb | 818 | shift_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int start, int end, int dy) |
5f5c8ee5 GM |
819 | { |
820 | int min_y, max_y; | |
177c0ea7 | 821 | |
5f5c8ee5 GM |
822 | xassert (start <= end); |
823 | xassert (start >= 0 && start < matrix->nrows); | |
824 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 825 | |
7df02016 KS |
826 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
827 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 828 | |
5f5c8ee5 GM |
829 | for (; start < end; ++start) |
830 | { | |
831 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 832 | |
5f5c8ee5 | 833 | row->y += dy; |
d6c747a4 | 834 | row->visible_height = row->height; |
177c0ea7 | 835 | |
5f5c8ee5 | 836 | if (row->y < min_y) |
d6c747a4 GM |
837 | row->visible_height -= min_y - row->y; |
838 | if (row->y + row->height > max_y) | |
839 | row->visible_height -= row->y + row->height - max_y; | |
e61124cd YM |
840 | if (row->fringe_bitmap_periodic_p) |
841 | row->redraw_fringe_bitmaps_p = 1; | |
5f5c8ee5 GM |
842 | } |
843 | } | |
844 | ||
845 | ||
846 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
847 | invalid is done by setting enabled_p to zero for all rows in a | |
848 | current matrix. */ | |
849 | ||
850 | void | |
971de7fb | 851 | clear_current_matrices (register struct frame *f) |
5f5c8ee5 GM |
852 | { |
853 | /* Clear frame current matrix, if we have one. */ | |
854 | if (f->current_matrix) | |
855 | clear_glyph_matrix (f->current_matrix); | |
856 | ||
857 | /* Clear the matrix of the menu bar window, if such a window exists. | |
858 | The menu bar window is currently used to display menus on X when | |
859 | no toolkit support is compiled in. */ | |
860 | if (WINDOWP (f->menu_bar_window)) | |
861 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
862 | ||
9ea173e8 GM |
863 | /* Clear the matrix of the tool-bar window, if any. */ |
864 | if (WINDOWP (f->tool_bar_window)) | |
865 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
5f5c8ee5 GM |
866 | |
867 | /* Clear current window matrices. */ | |
868 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
869 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); | |
870 | } | |
871 | ||
872 | ||
873 | /* Clear out all display lines of F for a coming redisplay. */ | |
874 | ||
875 | void | |
971de7fb | 876 | clear_desired_matrices (register struct frame *f) |
5f5c8ee5 GM |
877 | { |
878 | if (f->desired_matrix) | |
879 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 880 | |
5f5c8ee5 GM |
881 | if (WINDOWP (f->menu_bar_window)) |
882 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
883 | ||
9ea173e8 GM |
884 | if (WINDOWP (f->tool_bar_window)) |
885 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
5f5c8ee5 GM |
886 | |
887 | /* Do it for window matrices. */ | |
888 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
889 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
890 | } | |
891 | ||
892 | ||
893 | /* Clear matrices in window tree rooted in W. If DESIRED_P is | |
894 | non-zero clear desired matrices, otherwise clear current matrices. */ | |
895 | ||
896 | static void | |
971de7fb | 897 | clear_window_matrices (struct window *w, int desired_p) |
5f5c8ee5 GM |
898 | { |
899 | while (w) | |
900 | { | |
901 | if (!NILP (w->hchild)) | |
902 | { | |
903 | xassert (WINDOWP (w->hchild)); | |
904 | clear_window_matrices (XWINDOW (w->hchild), desired_p); | |
905 | } | |
906 | else if (!NILP (w->vchild)) | |
907 | { | |
908 | xassert (WINDOWP (w->vchild)); | |
909 | clear_window_matrices (XWINDOW (w->vchild), desired_p); | |
910 | } | |
911 | else | |
912 | { | |
913 | if (desired_p) | |
914 | clear_glyph_matrix (w->desired_matrix); | |
915 | else | |
916 | { | |
917 | clear_glyph_matrix (w->current_matrix); | |
918 | w->window_end_valid = Qnil; | |
919 | } | |
920 | } | |
921 | ||
922 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
923 | } | |
924 | } | |
925 | ||
926 | ||
927 | \f | |
928 | /*********************************************************************** | |
929 | Glyph Rows | |
930 | ||
931 | See dispextern.h for an overall explanation of glyph rows. | |
932 | ***********************************************************************/ | |
933 | ||
934 | /* Clear glyph row ROW. Do it in a way that makes it robust against | |
935 | changes in the glyph_row structure, i.e. addition or removal of | |
936 | structure members. */ | |
937 | ||
2cca872d KH |
938 | static struct glyph_row null_row; |
939 | ||
5f5c8ee5 | 940 | void |
971de7fb | 941 | clear_glyph_row (struct glyph_row *row) |
5f5c8ee5 GM |
942 | { |
943 | struct glyph *p[1 + LAST_AREA]; | |
5f5c8ee5 GM |
944 | |
945 | /* Save pointers. */ | |
946 | p[LEFT_MARGIN_AREA] = row->glyphs[LEFT_MARGIN_AREA]; | |
947 | p[TEXT_AREA] = row->glyphs[TEXT_AREA]; | |
948 | p[RIGHT_MARGIN_AREA] = row->glyphs[RIGHT_MARGIN_AREA]; | |
949 | p[LAST_AREA] = row->glyphs[LAST_AREA]; | |
950 | ||
951 | /* Clear. */ | |
952 | *row = null_row; | |
953 | ||
954 | /* Restore pointers. */ | |
955 | row->glyphs[LEFT_MARGIN_AREA] = p[LEFT_MARGIN_AREA]; | |
956 | row->glyphs[TEXT_AREA] = p[TEXT_AREA]; | |
957 | row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA]; | |
958 | row->glyphs[LAST_AREA] = p[LAST_AREA]; | |
45560b1a GM |
959 | |
960 | #if 0 /* At some point, some bit-fields of struct glyph were not set, | |
961 | which made glyphs unequal when compared with GLYPH_EQUAL_P. | |
962 | Redisplay outputs such glyphs, and flickering effects were | |
963 | the result. This also depended on the contents of memory | |
964 | returned by xmalloc. If flickering happens again, activate | |
153a073c | 965 | the code below. If the flickering is gone with that, chances |
45560b1a | 966 | are that the flickering has the same reason as here. */ |
72af86bd | 967 | memset (p[0], 0, (char *) p[LAST_AREA] - (char *) p[0]); |
45560b1a | 968 | #endif |
5f5c8ee5 GM |
969 | } |
970 | ||
971 | ||
972 | /* Make ROW an empty, enabled row of canonical character height, | |
973 | in window W starting at y-position Y. */ | |
974 | ||
975 | void | |
971de7fb | 976 | blank_row (struct window *w, struct glyph_row *row, int y) |
5f5c8ee5 GM |
977 | { |
978 | int min_y, max_y; | |
177c0ea7 | 979 | |
7df02016 KS |
980 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
981 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 982 | |
5f5c8ee5 GM |
983 | clear_glyph_row (row); |
984 | row->y = y; | |
408f5064 | 985 | row->ascent = row->phys_ascent = 0; |
7df02016 | 986 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 987 | row->visible_height = row->height; |
177c0ea7 | 988 | |
5f5c8ee5 | 989 | if (row->y < min_y) |
d6c747a4 GM |
990 | row->visible_height -= min_y - row->y; |
991 | if (row->y + row->height > max_y) | |
992 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
993 | |
994 | row->enabled_p = 1; | |
995 | } | |
996 | ||
997 | ||
998 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
999 | are the amounts by which to change positions. Note that the first | |
1000 | glyph of the text area of a row can have a buffer position even if | |
1001 | the used count of the text area is zero. Such rows display line | |
1002 | ends. */ | |
1003 | ||
5bf46f05 | 1004 | static void |
ace1712c | 1005 | increment_row_positions (struct glyph_row *row, |
d311d28c | 1006 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
1007 | { |
1008 | int area, i; | |
1009 | ||
1010 | /* Increment start and end positions. */ | |
1011 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
1012 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
1013 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
1014 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
d36fe237 EZ |
1015 | CHARPOS (row->start.pos) += delta; |
1016 | BYTEPOS (row->start.pos) += delta_bytes; | |
1017 | CHARPOS (row->end.pos) += delta; | |
1018 | BYTEPOS (row->end.pos) += delta_bytes; | |
5f5c8ee5 | 1019 | |
5cacdcfd KS |
1020 | if (!row->enabled_p) |
1021 | return; | |
1022 | ||
5f5c8ee5 GM |
1023 | /* Increment positions in glyphs. */ |
1024 | for (area = 0; area < LAST_AREA; ++area) | |
1025 | for (i = 0; i < row->used[area]; ++i) | |
1026 | if (BUFFERP (row->glyphs[area][i].object) | |
1027 | && row->glyphs[area][i].charpos > 0) | |
1028 | row->glyphs[area][i].charpos += delta; | |
1029 | ||
1030 | /* Capture the case of rows displaying a line end. */ | |
1031 | if (row->used[TEXT_AREA] == 0 | |
1032 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1033 | row->glyphs[TEXT_AREA]->charpos += delta; | |
1034 | } | |
1035 | ||
1036 | ||
9af3e742 | 1037 | #if 0 |
5f5c8ee5 GM |
1038 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
1039 | contents, i.e. glyph structure contents are exchanged between A and | |
1040 | B without changing glyph pointers in A and B. */ | |
1041 | ||
1042 | static void | |
1dae0f0a | 1043 | swap_glyphs_in_rows (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1044 | { |
1045 | int area; | |
1046 | ||
1047 | for (area = 0; area < LAST_AREA; ++area) | |
1048 | { | |
1049 | /* Number of glyphs to swap. */ | |
1050 | int max_used = max (a->used[area], b->used[area]); | |
1051 | ||
1052 | /* Start of glyphs in area of row A. */ | |
1053 | struct glyph *glyph_a = a->glyphs[area]; | |
1054 | ||
1055 | /* End + 1 of glyphs in area of row A. */ | |
1056 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
1057 | ||
1058 | /* Start of glyphs in area of row B. */ | |
1059 | struct glyph *glyph_b = b->glyphs[area]; | |
1060 | ||
1061 | while (glyph_a < glyph_a_end) | |
1062 | { | |
1063 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
1064 | initialization. */ | |
1065 | struct glyph temp; | |
1066 | temp = *glyph_a; | |
1067 | *glyph_a = *glyph_b; | |
1068 | *glyph_b = temp; | |
1069 | ++glyph_a; | |
1070 | ++glyph_b; | |
1071 | } | |
1072 | } | |
1073 | } | |
1074 | ||
9af3e742 | 1075 | #endif /* 0 */ |
5f5c8ee5 | 1076 | |
015137db EZ |
1077 | /* Exchange pointers to glyph memory between glyph rows A and B. Also |
1078 | exchange the used[] array and the hash values of the rows, because | |
1079 | these should all go together for the row's hash value to be | |
1080 | correct. */ | |
5f5c8ee5 | 1081 | |
55d4c1b2 | 1082 | static inline void |
971de7fb | 1083 | swap_glyph_pointers (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1084 | { |
1085 | int i; | |
015137db EZ |
1086 | unsigned hash_tem = a->hash; |
1087 | ||
5f5c8ee5 GM |
1088 | for (i = 0; i < LAST_AREA + 1; ++i) |
1089 | { | |
1090 | struct glyph *temp = a->glyphs[i]; | |
015137db | 1091 | |
5f5c8ee5 GM |
1092 | a->glyphs[i] = b->glyphs[i]; |
1093 | b->glyphs[i] = temp; | |
73055685 EZ |
1094 | if (i < LAST_AREA) |
1095 | { | |
1096 | short used_tem = a->used[i]; | |
1097 | ||
1098 | a->used[i] = b->used[i]; | |
1099 | b->used[i] = used_tem; | |
1100 | } | |
5f5c8ee5 | 1101 | } |
015137db EZ |
1102 | a->hash = b->hash; |
1103 | b->hash = hash_tem; | |
5f5c8ee5 GM |
1104 | } |
1105 | ||
1106 | ||
1107 | /* Copy glyph row structure FROM to glyph row structure TO, except | |
015137db EZ |
1108 | that glyph pointers, the `used' counts, and the hash values in the |
1109 | structures are left unchanged. */ | |
5f5c8ee5 | 1110 | |
55d4c1b2 | 1111 | static inline void |
971de7fb | 1112 | copy_row_except_pointers (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1113 | { |
1114 | struct glyph *pointers[1 + LAST_AREA]; | |
73055685 | 1115 | short used[LAST_AREA]; |
015137db | 1116 | unsigned hashval; |
5f5c8ee5 GM |
1117 | |
1118 | /* Save glyph pointers of TO. */ | |
72af86bd | 1119 | memcpy (pointers, to->glyphs, sizeof to->glyphs); |
015137db EZ |
1120 | memcpy (used, to->used, sizeof to->used); |
1121 | hashval = to->hash; | |
5f5c8ee5 GM |
1122 | |
1123 | /* Do a structure assignment. */ | |
1124 | *to = *from; | |
1125 | ||
1126 | /* Restore original pointers of TO. */ | |
72af86bd | 1127 | memcpy (to->glyphs, pointers, sizeof to->glyphs); |
015137db EZ |
1128 | memcpy (to->used, used, sizeof to->used); |
1129 | to->hash = hashval; | |
5f5c8ee5 GM |
1130 | } |
1131 | ||
1132 | ||
5f5c8ee5 GM |
1133 | /* Assign glyph row FROM to glyph row TO. This works like a structure |
1134 | assignment TO = FROM, except that glyph pointers are not copied but | |
1135 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1136 | a memory leak. */ | |
1137 | ||
55d4c1b2 | 1138 | static inline void |
971de7fb | 1139 | assign_row (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1140 | { |
1141 | swap_glyph_pointers (to, from); | |
1142 | copy_row_except_pointers (to, from); | |
1143 | } | |
1144 | ||
1145 | ||
1146 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1147 | a row in a window matrix, is a slice of the glyph memory of the | |
1148 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
1149 | is non-zero if the glyph memory of WINDOW_ROW is part of the glyph | |
1150 | memory of FRAME_ROW. */ | |
1151 | ||
2d5912c1 | 1152 | #if GLYPH_DEBUG |
9339e87f | 1153 | |
5f5c8ee5 | 1154 | static int |
59fc5cf9 | 1155 | glyph_row_slice_p (struct glyph_row *window_row, struct glyph_row *frame_row) |
5f5c8ee5 GM |
1156 | { |
1157 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1158 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1159 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1160 | ||
1161 | return (frame_glyph_start <= window_glyph_start | |
1162 | && window_glyph_start < frame_glyph_end); | |
1163 | } | |
1164 | ||
9339e87f | 1165 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1166 | |
9af3e742 GM |
1167 | #if 0 |
1168 | ||
5f5c8ee5 GM |
1169 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1170 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1171 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1172 | ||
1173 | static struct glyph_row * | |
59fc5cf9 AS |
1174 | find_glyph_row_slice (struct glyph_matrix *window_matrix, |
1175 | struct glyph_matrix *frame_matrix, int row) | |
5f5c8ee5 GM |
1176 | { |
1177 | int i; | |
1178 | ||
1179 | xassert (row >= 0 && row < frame_matrix->nrows); | |
1180 | ||
1181 | for (i = 0; i < window_matrix->nrows; ++i) | |
1182 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1183 | frame_matrix->rows + row)) | |
1184 | break; | |
1185 | ||
1186 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1187 | } | |
1188 | ||
9af3e742 | 1189 | #endif /* 0 */ |
5f5c8ee5 GM |
1190 | |
1191 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1192 | i.e. they are only marked as to be cleared by setting their | |
1193 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1194 | call to this function really clears it. */ | |
1195 | ||
1196 | void | |
971de7fb | 1197 | prepare_desired_row (struct glyph_row *row) |
5f5c8ee5 GM |
1198 | { |
1199 | if (!row->enabled_p) | |
1200 | { | |
dfd153ae | 1201 | int rp = row->reversed_p; |
5009f85e | 1202 | |
5f5c8ee5 GM |
1203 | clear_glyph_row (row); |
1204 | row->enabled_p = 1; | |
5009f85e | 1205 | row->reversed_p = rp; |
5f5c8ee5 GM |
1206 | } |
1207 | } | |
1208 | ||
1209 | ||
1210 | /* Return a hash code for glyph row ROW. */ | |
1211 | ||
2f7c71a1 | 1212 | static int |
971de7fb | 1213 | line_hash_code (struct glyph_row *row) |
5f5c8ee5 GM |
1214 | { |
1215 | int hash = 0; | |
177c0ea7 | 1216 | |
5f5c8ee5 GM |
1217 | if (row->enabled_p) |
1218 | { | |
4cecaab8 MB |
1219 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1220 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1221 | ||
1222 | while (glyph < end) | |
1223 | { | |
1224 | int c = glyph->u.ch; | |
1225 | int face_id = glyph->face_id; | |
daf01701 | 1226 | if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
4cecaab8 MB |
1227 | c -= SPACEGLYPH; |
1228 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1229 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1230 | ++glyph; | |
1231 | } | |
5f5c8ee5 | 1232 | |
4cecaab8 MB |
1233 | if (hash == 0) |
1234 | hash = 1; | |
5f5c8ee5 GM |
1235 | } |
1236 | ||
1237 | return hash; | |
1238 | } | |
1239 | ||
1240 | ||
153a073c | 1241 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1242 | the number of characters in the line. If must_write_spaces is |
1243 | zero, leading and trailing spaces are ignored. */ | |
1244 | ||
dfd153ae | 1245 | static int |
971de7fb | 1246 | line_draw_cost (struct glyph_matrix *matrix, int vpos) |
5f5c8ee5 GM |
1247 | { |
1248 | struct glyph_row *row = matrix->rows + vpos; | |
1249 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1250 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1251 | int len; | |
1252 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
ca9ce8f2 | 1253 | ptrdiff_t glyph_table_len = GLYPH_TABLE_LENGTH; |
5f5c8ee5 GM |
1254 | |
1255 | /* Ignore trailing and leading spaces if we can. */ | |
daf01701 | 1256 | if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
5f5c8ee5 GM |
1257 | { |
1258 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1259 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1260 | --end; |
1261 | ||
177c0ea7 | 1262 | /* All blank line. */ |
5f5c8ee5 GM |
1263 | if (end == beg) |
1264 | return 0; | |
1265 | ||
1266 | /* Skip over leading spaces. */ | |
1267 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1268 | ++beg; | |
1269 | } | |
1270 | ||
1271 | /* If we don't have a glyph-table, each glyph is one character, | |
1272 | so return the number of glyphs. */ | |
1273 | if (glyph_table_base == 0) | |
1274 | len = end - beg; | |
1275 | else | |
1276 | { | |
1277 | /* Otherwise, scan the glyphs and accumulate their total length | |
1278 | in LEN. */ | |
1279 | len = 0; | |
1280 | while (beg < end) | |
1281 | { | |
3fc809e2 | 1282 | GLYPH g; |
177c0ea7 | 1283 | |
3fc809e2 KS |
1284 | SET_GLYPH_FROM_CHAR_GLYPH (g, *beg); |
1285 | ||
565b39a8 | 1286 | if (GLYPH_INVALID_P (g) |
42186983 | 1287 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) |
5f5c8ee5 GM |
1288 | len += 1; |
1289 | else | |
1290 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1291 | |
5f5c8ee5 GM |
1292 | ++beg; |
1293 | } | |
1294 | } | |
177c0ea7 | 1295 | |
5f5c8ee5 GM |
1296 | return len; |
1297 | } | |
1298 | ||
1299 | ||
1300 | /* Test two glyph rows A and B for equality. Value is non-zero if A | |
6b1f9ba4 JB |
1301 | and B have equal contents. MOUSE_FACE_P non-zero means compare the |
1302 | mouse_face_p flags of A and B, too. */ | |
5f5c8ee5 | 1303 | |
55d4c1b2 | 1304 | static inline int |
6b1f9ba4 | 1305 | row_equal_p (struct glyph_row *a, struct glyph_row *b, int mouse_face_p) |
5f5c8ee5 | 1306 | { |
7a7270dd EZ |
1307 | xassert (verify_row_hash (a)); |
1308 | xassert (verify_row_hash (b)); | |
1309 | ||
5f5c8ee5 GM |
1310 | if (a == b) |
1311 | return 1; | |
1312 | else if (a->hash != b->hash) | |
1313 | return 0; | |
1314 | else | |
1315 | { | |
1316 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1317 | int area; | |
1318 | ||
e4e0bee9 GM |
1319 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1320 | return 0; | |
1321 | ||
5f5c8ee5 GM |
1322 | /* Compare glyphs. */ |
1323 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1324 | { | |
1325 | if (a->used[area] != b->used[area]) | |
1326 | return 0; | |
177c0ea7 | 1327 | |
5f5c8ee5 GM |
1328 | a_glyph = a->glyphs[area]; |
1329 | a_end = a_glyph + a->used[area]; | |
1330 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1331 | |
5f5c8ee5 GM |
1332 | while (a_glyph < a_end |
1333 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1334 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1335 | |
5f5c8ee5 GM |
1336 | if (a_glyph != a_end) |
1337 | return 0; | |
1338 | } | |
1339 | ||
6b61353c KH |
1340 | if (a->fill_line_p != b->fill_line_p |
1341 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1342 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
1343 | || a->left_fringe_face_id != b->left_fringe_face_id | |
e61124cd | 1344 | || a->left_fringe_offset != b->left_fringe_offset |
6b61353c KH |
1345 | || a->right_fringe_bitmap != b->right_fringe_bitmap |
1346 | || a->right_fringe_face_id != b->right_fringe_face_id | |
e61124cd YM |
1347 | || a->right_fringe_offset != b->right_fringe_offset |
1348 | || a->fringe_bitmap_periodic_p != b->fringe_bitmap_periodic_p | |
3d4a365f | 1349 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
6b61353c | 1350 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1351 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1352 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1353 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
918f4159 | 1354 | || a->reversed_p != b->reversed_p |
5f5c8ee5 GM |
1355 | /* Different partially visible characters on left margin. */ |
1356 | || a->x != b->x | |
1357 | /* Different height. */ | |
1358 | || a->ascent != b->ascent | |
408f5064 GM |
1359 | || a->phys_ascent != b->phys_ascent |
1360 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1361 | || a->visible_height != b->visible_height) |
1362 | return 0; | |
1363 | } | |
1364 | ||
1365 | return 1; | |
1366 | } | |
1367 | ||
1368 | ||
1369 | \f | |
1370 | /*********************************************************************** | |
1371 | Glyph Pool | |
1372 | ||
1373 | See dispextern.h for an overall explanation of glyph pools. | |
1374 | ***********************************************************************/ | |
1375 | ||
1376 | /* Allocate a glyph_pool structure. The structure returned is | |
1377 | initialized with zeros. The global variable glyph_pool_count is | |
1378 | incremented for each pool allocated. */ | |
1379 | ||
1380 | static struct glyph_pool * | |
971de7fb | 1381 | new_glyph_pool (void) |
5f5c8ee5 GM |
1382 | { |
1383 | struct glyph_pool *result; | |
1384 | ||
1385 | /* Allocate a new glyph_pool and clear it. */ | |
1386 | result = (struct glyph_pool *) xmalloc (sizeof *result); | |
72af86bd | 1387 | memset (result, 0, sizeof *result); |
177c0ea7 | 1388 | |
5f5c8ee5 GM |
1389 | /* For memory leak and double deletion checking. */ |
1390 | ++glyph_pool_count; | |
177c0ea7 | 1391 | |
5f5c8ee5 GM |
1392 | return result; |
1393 | } | |
1394 | ||
1395 | ||
1396 | /* Free a glyph_pool structure POOL. The function may be called with | |
1397 | a null POOL pointer. The global variable glyph_pool_count is | |
1398 | decremented with every pool structure freed. If this count gets | |
1399 | negative, more structures were freed than allocated, i.e. one | |
1400 | structure must have been freed more than once or a bogus pointer | |
1401 | was passed to free_glyph_pool. */ | |
1402 | ||
1403 | static void | |
971de7fb | 1404 | free_glyph_pool (struct glyph_pool *pool) |
5f5c8ee5 GM |
1405 | { |
1406 | if (pool) | |
1407 | { | |
153a073c | 1408 | /* More freed than allocated? */ |
5f5c8ee5 GM |
1409 | --glyph_pool_count; |
1410 | xassert (glyph_pool_count >= 0); | |
1411 | ||
1412 | xfree (pool->glyphs); | |
1413 | xfree (pool); | |
1414 | } | |
1415 | } | |
1416 | ||
1417 | ||
1418 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1419 | columns we need. This function never shrinks a pool. The only | |
1420 | case in which this would make sense, would be when a frame's size | |
1421 | is changed from a large value to a smaller one. But, if someone | |
1422 | does it once, we can expect that he will do it again. | |
1423 | ||
1424 | Value is non-zero if the pool changed in a way which makes | |
1425 | re-adjusting window glyph matrices necessary. */ | |
1426 | ||
1427 | static int | |
971de7fb | 1428 | realloc_glyph_pool (struct glyph_pool *pool, struct dim matrix_dim) |
5f5c8ee5 | 1429 | { |
ca9ce8f2 | 1430 | ptrdiff_t needed; |
5f5c8ee5 GM |
1431 | int changed_p; |
1432 | ||
1433 | changed_p = (pool->glyphs == 0 | |
1434 | || matrix_dim.height != pool->nrows | |
1435 | || matrix_dim.width != pool->ncolumns); | |
1436 | ||
1437 | /* Enlarge the glyph pool. */ | |
ca9ce8f2 | 1438 | needed = matrix_dim.width; |
0065d054 PE |
1439 | if (INT_MULTIPLY_OVERFLOW (needed, matrix_dim.height)) |
1440 | memory_full (SIZE_MAX); | |
ca9ce8f2 | 1441 | needed *= matrix_dim.height; |
5f5c8ee5 GM |
1442 | if (needed > pool->nglyphs) |
1443 | { | |
0065d054 PE |
1444 | ptrdiff_t old_nglyphs = pool->nglyphs; |
1445 | pool->glyphs = xpalloc (pool->glyphs, &pool->nglyphs, | |
1446 | needed - old_nglyphs, -1, sizeof *pool->glyphs); | |
1447 | memset (pool->glyphs + old_nglyphs, 0, | |
1448 | (pool->nglyphs - old_nglyphs) * sizeof *pool->glyphs); | |
5f5c8ee5 GM |
1449 | } |
1450 | ||
153a073c | 1451 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1452 | to do sanity checks, and (b) the number of columns determines |
1453 | where rows in the frame matrix start---this must be available to | |
1454 | determine pointers to rows of window sub-matrices. */ | |
1455 | pool->nrows = matrix_dim.height; | |
1456 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1457 | |
5f5c8ee5 GM |
1458 | return changed_p; |
1459 | } | |
1460 | ||
1461 | ||
1462 | \f | |
1463 | /*********************************************************************** | |
1464 | Debug Code | |
1465 | ***********************************************************************/ | |
1466 | ||
1467 | #if GLYPH_DEBUG | |
1468 | ||
a13396c9 | 1469 | |
28d440ab KL |
1470 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1471 | XXX Maybe this should be changed to flush the current terminal instead of | |
1472 | stdout. | |
1473 | */ | |
a13396c9 | 1474 | |
85fece3e PE |
1475 | void flush_stdout (void) EXTERNALLY_VISIBLE; |
1476 | ||
a13396c9 | 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 | 1931 | XSETFASTINT (root->top_line, top_margin); |
562dd5e9 | 1932 | XSETFASTINT (root->total_lines, frame_lines - 1 - top_margin); |
7df02016 | 1933 | XSETFASTINT (root->total_cols, frame_cols); |
5f5c8ee5 GM |
1934 | |
1935 | /* Do it for the mini-buffer window. */ | |
7df02016 | 1936 | XSETFASTINT (mini->top_line, frame_lines - 1); |
562dd5e9 | 1937 | XSETFASTINT (mini->total_lines, 1); |
7df02016 | 1938 | XSETFASTINT (mini->total_cols, frame_cols); |
5f5c8ee5 | 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; | |
dfd153ae | 2060 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
bccee4f2 | 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; | |
dfd153ae | 2082 | ptrdiff_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 */ | |
d5c20fe8 | 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 | 2269 | { |
dfd153ae | 2270 | ptrdiff_t size = FRAME_MESSAGE_BUF_SIZE (f) + 1; |
5f5c8ee5 GM |
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 | |
d311d28c | 2552 | && (gc = DISP_BORDER_GLYPH (dp), GLYPH_CODE_P (gc))) |
3fc809e2 KS |
2553 | { |
2554 | SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph, gc); | |
2555 | spec_glyph_lookup_face (w, &right_border_glyph); | |
2556 | } | |
b4e49aee | 2557 | |
3fc809e2 KS |
2558 | if (GLYPH_FACE (right_border_glyph) <= 0) |
2559 | SET_GLYPH_FACE (right_border_glyph, VERTICAL_BORDER_FACE_ID); | |
5f5c8ee5 GM |
2560 | } |
2561 | } | |
2562 | else | |
2563 | window_matrix = w->current_matrix; | |
2564 | ||
2565 | /* For all rows in the window matrix and corresponding rows in the | |
2566 | frame matrix. */ | |
2567 | window_y = 0; | |
2568 | frame_y = window_matrix->matrix_y; | |
2569 | while (window_y < window_matrix->nrows) | |
2570 | { | |
2571 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2572 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
2a8bd25f | 2573 | int current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2574 | |
2575 | /* Fill up the frame row with spaces up to the left margin of the | |
2576 | window row. */ | |
2577 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2578 | ||
2579 | /* Fill up areas in the window matrix row with spaces. */ | |
2580 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2581 | |
2582 | /* If only part of W's desired matrix has been built, and | |
2583 | window_row wasn't displayed, use the corresponding current | |
2584 | row instead. */ | |
2585 | if (window_matrix == w->desired_matrix | |
2586 | && !window_row->enabled_p) | |
2587 | { | |
2588 | window_row = w->current_matrix->rows + window_y; | |
2589 | current_row_p = 1; | |
2590 | } | |
177c0ea7 | 2591 | |
2a8bd25f | 2592 | if (current_row_p) |
5f5c8ee5 | 2593 | { |
2a8bd25f | 2594 | /* Copy window row to frame row. */ |
72af86bd AS |
2595 | memcpy (frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, |
2596 | window_row->glyphs[0], | |
2597 | window_matrix->matrix_w * sizeof (struct glyph)); | |
5f5c8ee5 GM |
2598 | } |
2599 | else | |
2600 | { | |
2a8bd25f | 2601 | xassert (window_row->enabled_p); |
177c0ea7 | 2602 | |
2a8bd25f GM |
2603 | /* Only when a desired row has been displayed, we want |
2604 | the corresponding frame row to be updated. */ | |
2605 | frame_row->enabled_p = 1; | |
177c0ea7 | 2606 | |
5f5c8ee5 GM |
2607 | /* Maybe insert a vertical border between horizontally adjacent |
2608 | windows. */ | |
3fc809e2 | 2609 | if (GLYPH_CHAR (right_border_glyph) != 0) |
5f5c8ee5 GM |
2610 | { |
2611 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2612 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2613 | } | |
2614 | ||
498c08ea | 2615 | #if GLYPH_DEBUG |
a13396c9 GM |
2616 | /* Window row window_y must be a slice of frame row |
2617 | frame_y. */ | |
5f5c8ee5 | 2618 | xassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2619 | |
5f5c8ee5 GM |
2620 | /* If rows are in sync, we don't have to copy glyphs because |
2621 | frame and window share glyphs. */ | |
177c0ea7 | 2622 | |
a38634ff | 2623 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2624 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2625 | #endif |
5f5c8ee5 GM |
2626 | } |
2627 | ||
2628 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2629 | up with spaces, and visit leaf windows from left to right it | |
2630 | can be done simply. */ | |
177c0ea7 | 2631 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2632 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2633 | ||
5f5c8ee5 GM |
2634 | /* Next row. */ |
2635 | ++window_y; | |
2636 | ++frame_y; | |
2637 | } | |
2638 | } | |
2639 | ||
5f81871e RS |
2640 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2641 | ID, return a glyph that has a realized face ID. | |
2642 | This is used for glyphs displayed specially and not part of the text; | |
2643 | for instance, vertical separators, truncation markers, etc. */ | |
2644 | ||
3fc809e2 | 2645 | void |
971de7fb | 2646 | spec_glyph_lookup_face (struct window *w, GLYPH *glyph) |
5f81871e | 2647 | { |
3fc809e2 | 2648 | int lface_id = GLYPH_FACE (*glyph); |
5f81871e RS |
2649 | /* Convert the glyph's specified face to a realized (cache) face. */ |
2650 | if (lface_id > 0) | |
2651 | { | |
2652 | int face_id = merge_faces (XFRAME (w->frame), | |
2653 | Qt, lface_id, DEFAULT_FACE_ID); | |
3fc809e2 | 2654 | SET_GLYPH_FACE (*glyph, face_id); |
5f81871e | 2655 | } |
5f81871e | 2656 | } |
5f5c8ee5 GM |
2657 | |
2658 | /* Add spaces to a glyph row ROW in a window matrix. | |
2659 | ||
2660 | Each row has the form: | |
2661 | ||
2662 | +---------+-----------------------------+------------+ | |
2663 | | left | text | right | | |
2664 | +---------+-----------------------------+------------+ | |
2665 | ||
2666 | Left and right marginal areas are optional. This function adds | |
2667 | spaces to areas so that there are no empty holes between areas. | |
2668 | In other words: If the right area is not empty, the text area | |
2669 | is filled up with spaces up to the right area. If the text area | |
2670 | is not empty, the left area is filled up. | |
2671 | ||
2672 | To be called for frame-based redisplay, only. */ | |
2673 | ||
2674 | static void | |
971de7fb | 2675 | fill_up_glyph_row_with_spaces (struct glyph_row *row) |
5f5c8ee5 GM |
2676 | { |
2677 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2678 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2679 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2680 | } | |
2681 | ||
2682 | ||
2683 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2684 | frame-based redisplay only. */ | |
2685 | ||
2686 | static void | |
971de7fb | 2687 | fill_up_glyph_row_area_with_spaces (struct glyph_row *row, int area) |
5f5c8ee5 GM |
2688 | { |
2689 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2690 | { | |
2691 | struct glyph *end = row->glyphs[area + 1]; | |
2692 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2693 | ||
2694 | while (text < end) | |
2695 | *text++ = space_glyph; | |
2696 | row->used[area] = text - row->glyphs[area]; | |
2697 | } | |
2698 | } | |
2699 | ||
2700 | ||
2701 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2702 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2703 | ||
2704 | static void | |
971de7fb | 2705 | fill_up_frame_row_with_spaces (struct glyph_row *row, int upto) |
5f5c8ee5 GM |
2706 | { |
2707 | int i = row->used[TEXT_AREA]; | |
2708 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2709 | |
5f5c8ee5 GM |
2710 | while (i < upto) |
2711 | glyph[i++] = space_glyph; | |
2712 | ||
2713 | row->used[TEXT_AREA] = i; | |
2714 | } | |
2715 | ||
2716 | ||
2717 | \f | |
2718 | /********************************************************************** | |
2719 | Mirroring operations on frame matrices in window matrices | |
2720 | **********************************************************************/ | |
2721 | ||
2722 | /* Set frame being updated via frame-based redisplay to F. This | |
2723 | function must be called before updates to make explicit that we are | |
2724 | working on frame matrices or not. */ | |
2725 | ||
55d4c1b2 | 2726 | static inline void |
971de7fb | 2727 | set_frame_matrix_frame (struct frame *f) |
5f5c8ee5 GM |
2728 | { |
2729 | frame_matrix_frame = f; | |
2730 | } | |
2731 | ||
2732 | ||
2733 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2734 | DESIRED_MATRIX is the desired matrix corresponding to | |
2735 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2736 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2737 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2738 | done in frame matrices, and that we have to perform analogous | |
2739 | operations in window matrices of frame_matrix_frame. */ | |
2740 | ||
55d4c1b2 | 2741 | static inline void |
971de7fb | 2742 | make_current (struct glyph_matrix *desired_matrix, struct glyph_matrix *current_matrix, int row) |
5f5c8ee5 GM |
2743 | { |
2744 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2745 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
e876ff42 | 2746 | int mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2747 | |
2748 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2749 | between both rows, and does a structure assignment otherwise. */ | |
2750 | assign_row (current_row, desired_row); | |
2751 | ||
2752 | /* Enable current_row to mark it as valid. */ | |
2753 | current_row->enabled_p = 1; | |
e876ff42 | 2754 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2755 | |
2756 | /* If we are called on frame matrices, perform analogous operations | |
2757 | for window matrices. */ | |
2758 | if (frame_matrix_frame) | |
2759 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); | |
2760 | } | |
2761 | ||
2762 | ||
2763 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2764 | W's frame which has been made current (by swapping pointers between | |
2765 | current and desired matrix). Perform analogous operations in the | |
2766 | matrices of leaf windows in the window tree rooted at W. */ | |
2767 | ||
2768 | static void | |
971de7fb | 2769 | mirror_make_current (struct window *w, int frame_row) |
5f5c8ee5 GM |
2770 | { |
2771 | while (w) | |
2772 | { | |
2773 | if (!NILP (w->hchild)) | |
2774 | mirror_make_current (XWINDOW (w->hchild), frame_row); | |
2775 | else if (!NILP (w->vchild)) | |
2776 | mirror_make_current (XWINDOW (w->vchild), frame_row); | |
2777 | else | |
2778 | { | |
2779 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2780 | here because the checks performed in debug mode there | |
2781 | will not allow the conversion. */ | |
2782 | int row = frame_row - w->desired_matrix->matrix_y; | |
2783 | ||
2784 | /* If FRAME_ROW is within W, assign the desired row to the | |
2785 | current row (exchanging glyph pointers). */ | |
2786 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
2787 | { | |
2788 | struct glyph_row *current_row | |
2789 | = MATRIX_ROW (w->current_matrix, row); | |
2790 | struct glyph_row *desired_row | |
2791 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
2792 | |
2793 | if (desired_row->enabled_p) | |
2794 | assign_row (current_row, desired_row); | |
2795 | else | |
2796 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 | 2797 | current_row->enabled_p = 1; |
d009ae66 EZ |
2798 | |
2799 | /* Set the Y coordinate of the mode/header line's row. | |
2800 | It is needed in draw_row_with_mouse_face to find the | |
2801 | screen coordinates. (Window-based redisplay sets | |
2802 | this in update_window, but no one seems to do that | |
2803 | for frame-based redisplay.) */ | |
2804 | if (current_row->mode_line_p) | |
2805 | current_row->y = row; | |
5f5c8ee5 GM |
2806 | } |
2807 | } | |
177c0ea7 | 2808 | |
5f5c8ee5 GM |
2809 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2810 | } | |
2811 | } | |
2812 | ||
2813 | ||
2814 | /* Perform row dance after scrolling. We are working on the range of | |
2815 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
2816 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
2817 | row I in the range 0 <= I < NLINES, the index of the original line | |
2818 | to move to I. This index is relative to the row range, i.e. 0 <= | |
2819 | index < NLINES. RETAINED_P is a vector containing zero for each | |
2820 | row 0 <= I < NLINES which is empty. | |
2821 | ||
2822 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 2823 | |
5f5c8ee5 | 2824 | void |
6f704c76 DN |
2825 | mirrored_line_dance (struct glyph_matrix *matrix, int unchanged_at_top, int nlines, |
2826 | int *copy_from, char *retained_p) | |
5f5c8ee5 GM |
2827 | { |
2828 | /* A copy of original rows. */ | |
2829 | struct glyph_row *old_rows; | |
2830 | ||
2831 | /* Rows to assign to. */ | |
2832 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 2833 | |
5f5c8ee5 GM |
2834 | int i; |
2835 | ||
2836 | /* Make a copy of the original rows. */ | |
2837 | old_rows = (struct glyph_row *) alloca (nlines * sizeof *old_rows); | |
72af86bd | 2838 | memcpy (old_rows, new_rows, nlines * sizeof *old_rows); |
5f5c8ee5 GM |
2839 | |
2840 | /* Assign new rows, maybe clear lines. */ | |
2841 | for (i = 0; i < nlines; ++i) | |
2842 | { | |
2843 | int enabled_before_p = new_rows[i].enabled_p; | |
2844 | ||
2845 | xassert (i + unchanged_at_top < matrix->nrows); | |
2846 | xassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
2847 | new_rows[i] = old_rows[copy_from[i]]; | |
2848 | new_rows[i].enabled_p = enabled_before_p; | |
2849 | ||
2850 | /* RETAINED_P is zero for empty lines. */ | |
2851 | if (!retained_p[copy_from[i]]) | |
2852 | new_rows[i].enabled_p = 0; | |
2853 | } | |
2854 | ||
153a073c | 2855 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 GM |
2856 | if (frame_matrix_frame) |
2857 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), | |
2858 | unchanged_at_top, nlines, copy_from, retained_p); | |
2859 | } | |
2860 | ||
2861 | ||
a13396c9 | 2862 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 2863 | the current frame matrix. */ |
a13396c9 GM |
2864 | |
2865 | static void | |
971de7fb | 2866 | sync_window_with_frame_matrix_rows (struct window *w) |
a13396c9 GM |
2867 | { |
2868 | struct frame *f = XFRAME (w->frame); | |
2869 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
075c507b | 2870 | int left, right, x, width; |
a13396c9 | 2871 | |
5cb88111 | 2872 | /* Preconditions: W must be a leaf window on a tty frame. */ |
a13396c9 | 2873 | xassert (NILP (w->hchild) && NILP (w->vchild)); |
a13396c9 GM |
2874 | xassert (!FRAME_WINDOW_P (f)); |
2875 | ||
7df02016 KS |
2876 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
2877 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
2878 | x = w->current_matrix->matrix_x; |
2879 | width = w->current_matrix->matrix_w; | |
2880 | ||
a13396c9 GM |
2881 | window_row = w->current_matrix->rows; |
2882 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 2883 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 2884 | |
5cb88111 | 2885 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 2886 | { |
5cb88111 GM |
2887 | window_row->glyphs[LEFT_MARGIN_AREA] |
2888 | = frame_row->glyphs[0] + x; | |
2889 | window_row->glyphs[TEXT_AREA] | |
2890 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
2891 | window_row->glyphs[LAST_AREA] | |
2892 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
2893 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
2894 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
2895 | } |
2896 | } | |
2897 | ||
2898 | ||
2899 | /* Return the window in the window tree rooted in W containing frame | |
2900 | row ROW. Value is null if none is found. */ | |
2901 | ||
09ad5a91 | 2902 | static struct window * |
971de7fb | 2903 | frame_row_to_window (struct window *w, int row) |
a13396c9 GM |
2904 | { |
2905 | struct window *found = NULL; | |
177c0ea7 | 2906 | |
a13396c9 GM |
2907 | while (w && !found) |
2908 | { | |
2909 | if (!NILP (w->hchild)) | |
2910 | found = frame_row_to_window (XWINDOW (w->hchild), row); | |
2911 | else if (!NILP (w->vchild)) | |
2912 | found = frame_row_to_window (XWINDOW (w->vchild), row); | |
7df02016 KS |
2913 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
2914 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 2915 | found = w; |
177c0ea7 | 2916 | |
a13396c9 GM |
2917 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2918 | } | |
2919 | ||
2920 | return found; | |
2921 | } | |
2922 | ||
2923 | ||
5f5c8ee5 GM |
2924 | /* Perform a line dance in the window tree rooted at W, after |
2925 | scrolling a frame matrix in mirrored_line_dance. | |
2926 | ||
2927 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
2928 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
2929 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
2930 | I < NLINES, the index of the original line to move to I. This | |
2931 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
2932 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
2933 | which is empty. */ | |
2934 | ||
2935 | static void | |
971de7fb | 2936 | mirror_line_dance (struct window *w, int unchanged_at_top, int nlines, int *copy_from, char *retained_p) |
5f5c8ee5 GM |
2937 | { |
2938 | while (w) | |
2939 | { | |
2940 | if (!NILP (w->hchild)) | |
2941 | mirror_line_dance (XWINDOW (w->hchild), unchanged_at_top, | |
2942 | nlines, copy_from, retained_p); | |
2943 | else if (!NILP (w->vchild)) | |
2944 | mirror_line_dance (XWINDOW (w->vchild), unchanged_at_top, | |
2945 | nlines, copy_from, retained_p); | |
2946 | else | |
2947 | { | |
2948 | /* W is a leaf window, and we are working on its current | |
2949 | matrix m. */ | |
2950 | struct glyph_matrix *m = w->current_matrix; | |
a13396c9 | 2951 | int i, sync_p = 0; |
5f5c8ee5 GM |
2952 | struct glyph_row *old_rows; |
2953 | ||
2954 | /* Make a copy of the original rows of matrix m. */ | |
2955 | old_rows = (struct glyph_row *) alloca (m->nrows * sizeof *old_rows); | |
72af86bd | 2956 | memcpy (old_rows, m->rows, m->nrows * sizeof *old_rows); |
5f5c8ee5 GM |
2957 | |
2958 | for (i = 0; i < nlines; ++i) | |
2959 | { | |
2960 | /* Frame relative line assigned to. */ | |
2961 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 2962 | |
5f5c8ee5 GM |
2963 | /* Frame relative line assigned. */ |
2964 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 2965 | |
5f5c8ee5 GM |
2966 | /* Window relative line assigned to. */ |
2967 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 2968 | |
5f5c8ee5 GM |
2969 | /* Window relative line assigned. */ |
2970 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 2971 | |
5f5c8ee5 GM |
2972 | /* Is assigned line inside window? */ |
2973 | int from_inside_window_p | |
2974 | = window_from >= 0 && window_from < m->matrix_h; | |
177c0ea7 | 2975 | |
a13396c9 GM |
2976 | /* Is assigned to line inside window? */ |
2977 | int to_inside_window_p | |
2978 | = window_to >= 0 && window_to < m->matrix_h; | |
177c0ea7 | 2979 | |
a13396c9 | 2980 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 2981 | { |
5f5c8ee5 GM |
2982 | /* Enabled setting before assignment. */ |
2983 | int enabled_before_p; | |
177c0ea7 | 2984 | |
5f5c8ee5 GM |
2985 | /* Do the assignment. The enabled_p flag is saved |
2986 | over the assignment because the old redisplay did | |
2987 | that. */ | |
2988 | enabled_before_p = m->rows[window_to].enabled_p; | |
2989 | m->rows[window_to] = old_rows[window_from]; | |
2990 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 2991 | |
5f5c8ee5 GM |
2992 | /* If frame line is empty, window line is empty, too. */ |
2993 | if (!retained_p[copy_from[i]]) | |
2994 | m->rows[window_to].enabled_p = 0; | |
2995 | } | |
a13396c9 GM |
2996 | else if (to_inside_window_p) |
2997 | { | |
2998 | /* A copy between windows. This is an infrequent | |
2999 | case not worth optimizing. */ | |
3000 | struct frame *f = XFRAME (w->frame); | |
3001 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); | |
3002 | struct window *w2; | |
3003 | struct glyph_matrix *m2; | |
3004 | int m2_from; | |
3005 | ||
fe8b8401 | 3006 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
3007 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
3008 | -nw', FROM_FRAME sometimes has no associated window. | |
3009 | This check avoids a segfault if W2 is null. */ | |
3010 | if (w2) | |
3011 | { | |
3012 | m2 = w2->current_matrix; | |
3013 | m2_from = frame_from - m2->matrix_y; | |
3014 | copy_row_except_pointers (m->rows + window_to, | |
3015 | m2->rows + m2_from); | |
3016 | ||
3017 | /* If frame line is empty, window line is empty, too. */ | |
3018 | if (!retained_p[copy_from[i]]) | |
3019 | m->rows[window_to].enabled_p = 0; | |
3020 | } | |
a13396c9 GM |
3021 | sync_p = 1; |
3022 | } | |
3023 | else if (from_inside_window_p) | |
3024 | sync_p = 1; | |
5f5c8ee5 | 3025 | } |
a13396c9 GM |
3026 | |
3027 | /* If there was a copy between windows, make sure glyph | |
3028 | pointers are in sync with the frame matrix. */ | |
3029 | if (sync_p) | |
3030 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 3031 | |
5f5c8ee5 GM |
3032 | /* Check that no pointers are lost. */ |
3033 | CHECK_MATRIX (m); | |
3034 | } | |
3035 | ||
3036 | /* Next window on same level. */ | |
3037 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3038 | } | |
3039 | } | |
3040 | ||
3041 | ||
3042 | #if GLYPH_DEBUG | |
3043 | ||
3044 | /* Check that window and frame matrices agree about their | |
3045 | understanding where glyphs of the rows are to find. For each | |
3046 | window in the window tree rooted at W, check that rows in the | |
3047 | matrices of leaf window agree with their frame matrices about | |
3048 | glyph pointers. */ | |
3049 | ||
85fece3e | 3050 | static void |
59fc5cf9 | 3051 | check_window_matrix_pointers (struct window *w) |
5f5c8ee5 GM |
3052 | { |
3053 | while (w) | |
3054 | { | |
3055 | if (!NILP (w->hchild)) | |
3056 | check_window_matrix_pointers (XWINDOW (w->hchild)); | |
3057 | else if (!NILP (w->vchild)) | |
3058 | check_window_matrix_pointers (XWINDOW (w->vchild)); | |
3059 | else | |
60a8948a | 3060 | { |
5f5c8ee5 GM |
3061 | struct frame *f = XFRAME (w->frame); |
3062 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); | |
3063 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 3064 | } |
177c0ea7 | 3065 | |
5f5c8ee5 GM |
3066 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3067 | } | |
3068 | } | |
3069 | ||
3070 | ||
3071 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
3072 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
3073 | each row in WINDOW_MATRIX check that it's a slice of the | |
3074 | corresponding frame row. If it isn't, abort. */ | |
3075 | ||
3076 | static void | |
59fc5cf9 AS |
3077 | check_matrix_pointers (struct glyph_matrix *window_matrix, |
3078 | struct glyph_matrix *frame_matrix) | |
5f5c8ee5 GM |
3079 | { |
3080 | /* Row number in WINDOW_MATRIX. */ | |
3081 | int i = 0; | |
3082 | ||
3083 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
3084 | int j = window_matrix->matrix_y; | |
3085 | ||
177c0ea7 | 3086 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
3087 | slice of the row in the frame matrix. If it isn't we didn't |
3088 | mirror an operation on the frame matrix correctly. */ | |
3089 | while (i < window_matrix->nrows) | |
3090 | { | |
3091 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
3092 | frame_matrix->rows + j)) | |
3093 | abort (); | |
3094 | ++i, ++j; | |
3095 | } | |
3096 | } | |
3097 | ||
3098 | #endif /* GLYPH_DEBUG != 0 */ | |
3099 | ||
3100 | ||
3101 | \f | |
3102 | /********************************************************************** | |
3103 | VPOS and HPOS translations | |
3104 | **********************************************************************/ | |
3105 | ||
3106 | #if GLYPH_DEBUG | |
3107 | ||
3108 | /* Translate vertical position VPOS which is relative to window W to a | |
3109 | vertical position relative to W's frame. */ | |
3110 | ||
3111 | static int | |
59fc5cf9 | 3112 | window_to_frame_vpos (struct window *w, int vpos) |
5f5c8ee5 | 3113 | { |
85fece3e | 3114 | xassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
5f5c8ee5 | 3115 | xassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); |
7df02016 | 3116 | vpos += WINDOW_TOP_EDGE_LINE (w); |
85fece3e | 3117 | xassert (vpos >= 0 && vpos <= FRAME_LINES (XFRAME (w->frame))); |
5f5c8ee5 GM |
3118 | return vpos; |
3119 | } | |
3120 | ||
3121 | ||
3122 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 3123 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
3124 | |
3125 | static int | |
59fc5cf9 | 3126 | window_to_frame_hpos (struct window *w, int hpos) |
5f5c8ee5 | 3127 | { |
82f4a138 | 3128 | xassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 3129 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
3130 | return hpos; |
3131 | } | |
177c0ea7 | 3132 | |
5f5c8ee5 GM |
3133 | #endif /* GLYPH_DEBUG */ |
3134 | ||
3135 | ||
3136 | \f | |
3137 | /********************************************************************** | |
3138 | Redrawing Frames | |
3139 | **********************************************************************/ | |
3140 | ||
a7ca3326 | 3141 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
7ee72033 | 3142 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. */) |
5842a27b | 3143 | (Lisp_Object frame) |
5f5c8ee5 GM |
3144 | { |
3145 | struct frame *f; | |
3146 | ||
b7826503 | 3147 | CHECK_LIVE_FRAME (frame); |
5f5c8ee5 GM |
3148 | f = XFRAME (frame); |
3149 | ||
3150 | /* Ignore redraw requests, if frame has no glyphs yet. | |
3151 | (Implementation note: It still has to be checked why we are | |
3152 | called so early here). */ | |
3153 | if (!glyphs_initialized_initially_p) | |
3154 | return Qnil; | |
3155 | ||
3156 | update_begin (f); | |
3224dac1 | 3157 | #ifdef MSDOS |
f2adda5e | 3158 | if (FRAME_MSDOS_P (f)) |
79d39b69 | 3159 | FRAME_TERMINAL (f)->set_terminal_modes_hook (FRAME_TERMINAL (f)); |
3224dac1 | 3160 | #endif |
385ed61f | 3161 | clear_frame (f); |
5f5c8ee5 GM |
3162 | clear_current_matrices (f); |
3163 | update_end (f); | |
daf01701 | 3164 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3165 | fflush (FRAME_TTY (f)->output); |
5f5c8ee5 GM |
3166 | windows_or_buffers_changed++; |
3167 | /* Mark all windows as inaccurate, so that every window will have | |
3168 | its redisplay done. */ | |
3169 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
3170 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
3171 | f->garbaged = 0; | |
3172 | return Qnil; | |
3173 | } | |
3174 | ||
3175 | ||
3176 | /* Redraw frame F. This is nothing more than a call to the Lisp | |
3177 | function redraw-frame. */ | |
3178 | ||
3179 | void | |
971de7fb | 3180 | redraw_frame (struct frame *f) |
5f5c8ee5 GM |
3181 | { |
3182 | Lisp_Object frame; | |
3183 | XSETFRAME (frame, f); | |
3184 | Fredraw_frame (frame); | |
3185 | } | |
3186 | ||
3187 | ||
3188 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
7ee72033 | 3189 | doc: /* Clear and redisplay all visible frames. */) |
5842a27b | 3190 | (void) |
5f5c8ee5 GM |
3191 | { |
3192 | Lisp_Object tail, frame; | |
3193 | ||
3194 | FOR_EACH_FRAME (tail, frame) | |
3195 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
3196 | Fredraw_frame (frame); | |
3197 | ||
3198 | return Qnil; | |
3199 | } | |
3200 | ||
3201 | ||
5f5c8ee5 | 3202 | \f |
5f5c8ee5 GM |
3203 | /*********************************************************************** |
3204 | Frame Update | |
3205 | ***********************************************************************/ | |
4588ec20 | 3206 | |
5f5c8ee5 | 3207 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 3208 | |
5f5c8ee5 GM |
3209 | If FORCE_P is non-zero, don't let redisplay be stopped by detecting |
3210 | pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try | |
3211 | scrolling. | |
177c0ea7 | 3212 | |
5f5c8ee5 | 3213 | Value is non-zero if redisplay was stopped due to pending input. */ |
4588ec20 | 3214 | |
5f5c8ee5 | 3215 | int |
971de7fb | 3216 | update_frame (struct frame *f, int force_p, int inhibit_hairy_id_p) |
5f5c8ee5 GM |
3217 | { |
3218 | /* 1 means display has been paused because of pending input. */ | |
3219 | int paused_p; | |
3220 | struct window *root_window = XWINDOW (f->root_window); | |
3221 | ||
a2130dbb KS |
3222 | if (redisplay_dont_pause) |
3223 | force_p = 1; | |
d012c62b | 3224 | #if PERIODIC_PREEMPTION_CHECKING |
a2130dbb KS |
3225 | else if (NILP (Vredisplay_preemption_period)) |
3226 | force_p = 1; | |
3227 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
3228 | { |
3229 | EMACS_TIME tm; | |
3230 | double p = XFLOATINT (Vredisplay_preemption_period); | |
3231 | int sec, usec; | |
3232 | ||
993d4ab6 KS |
3233 | if (detect_input_pending_ignore_squeezables ()) |
3234 | { | |
3235 | paused_p = 1; | |
3236 | goto do_pause; | |
3237 | } | |
3238 | ||
d012c62b KS |
3239 | sec = (int) p; |
3240 | usec = (p - sec) * 1000000; | |
3241 | ||
3242 | EMACS_GET_TIME (tm); | |
3243 | EMACS_SET_SECS_USECS (preemption_period, sec, usec); | |
3244 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
3245 | } | |
3246 | #endif | |
3247 | ||
5f5c8ee5 | 3248 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3249 | { |
5f5c8ee5 GM |
3250 | /* We are working on window matrix basis. All windows whose |
3251 | flag must_be_updated_p is set have to be updated. */ | |
3252 | ||
3253 | /* Record that we are not working on frame matrices. */ | |
3254 | set_frame_matrix_frame (NULL); | |
3255 | ||
3256 | /* Update all windows in the window tree of F, maybe stopping | |
3257 | when pending input is detected. */ | |
3258 | update_begin (f); | |
3259 | ||
3260 | /* Update the menu bar on X frames that don't have toolkit | |
3261 | support. */ | |
3262 | if (WINDOWP (f->menu_bar_window)) | |
3263 | update_window (XWINDOW (f->menu_bar_window), 1); | |
3264 | ||
3265 | /* Update the tool-bar window, if present. */ | |
9ea173e8 | 3266 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3267 | { |
9ea173e8 | 3268 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3269 | |
3270 | /* Update tool-bar window. */ | |
3271 | if (w->must_be_updated_p) | |
4588ec20 | 3272 | { |
153a073c PJ |
3273 | Lisp_Object tem; |
3274 | ||
5f5c8ee5 GM |
3275 | update_window (w, 1); |
3276 | w->must_be_updated_p = 0; | |
3277 | ||
3278 | /* Swap tool-bar strings. We swap because we want to | |
3279 | reuse strings. */ | |
9ea173e8 GM |
3280 | tem = f->current_tool_bar_string; |
3281 | f->current_tool_bar_string = f->desired_tool_bar_string; | |
3282 | f->desired_tool_bar_string = tem; | |
4588ec20 JB |
3283 | } |
3284 | } | |
177c0ea7 | 3285 | |
5f5c8ee5 GM |
3286 | |
3287 | /* Update windows. */ | |
3288 | paused_p = update_window_tree (root_window, force_p); | |
3289 | update_end (f); | |
177c0ea7 | 3290 | |
6b61353c | 3291 | /* This flush is a performance bottleneck under X, |
e581a466 | 3292 | and it doesn't seem to be necessary anyway (in general). |
6b61353c | 3293 | It is necessary when resizing the window with the mouse, or |
e581a466 | 3294 | at least the fringes are not redrawn in a timely manner. ++kfs */ |
6b61353c | 3295 | if (f->force_flush_display_p) |
e581a466 KL |
3296 | { |
3297 | FRAME_RIF (f)->flush_display (f); | |
3298 | f->force_flush_display_p = 0; | |
3299 | } | |
4588ec20 | 3300 | } |
5f5c8ee5 GM |
3301 | else |
3302 | { | |
3303 | /* We are working on frame matrix basis. Set the frame on whose | |
3304 | frame matrix we operate. */ | |
3305 | set_frame_matrix_frame (f); | |
3306 | ||
868dd24b | 3307 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3308 | build_frame_matrix (f); |
177c0ea7 | 3309 | |
868dd24b GM |
3310 | /* Update the display */ |
3311 | update_begin (f); | |
5f5c8ee5 | 3312 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3313 | update_end (f); |
3314 | ||
7d2f1216 | 3315 | if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f)) |
3224dac1 | 3316 | { |
0b0d3e0b KL |
3317 | if (FRAME_TTY (f)->termscript) |
3318 | fflush (FRAME_TTY (f)->termscript); | |
7d2f1216 EZ |
3319 | if (FRAME_TERMCAP_P (f)) |
3320 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3321 | } |
868dd24b | 3322 | |
5f5c8ee5 | 3323 | /* Check window matrices for lost pointers. */ |
2d5912c1 | 3324 | #if GLYPH_DEBUG |
9b0e97aa GM |
3325 | check_window_matrix_pointers (root_window); |
3326 | add_frame_display_history (f, paused_p); | |
3327 | #endif | |
5f5c8ee5 GM |
3328 | } |
3329 | ||
ef1b0ba7 | 3330 | #if PERIODIC_PREEMPTION_CHECKING |
993d4ab6 | 3331 | do_pause: |
ef1b0ba7 | 3332 | #endif |
5f5c8ee5 GM |
3333 | /* Reset flags indicating that a window should be updated. */ |
3334 | set_window_update_flags (root_window, 0); | |
177c0ea7 | 3335 | |
868dd24b | 3336 | display_completed = !paused_p; |
5f5c8ee5 | 3337 | return paused_p; |
4588ec20 | 3338 | } |
5f5c8ee5 GM |
3339 | |
3340 | ||
4588ec20 | 3341 | \f |
5f5c8ee5 GM |
3342 | /************************************************************************ |
3343 | Window-based updates | |
3344 | ************************************************************************/ | |
3345 | ||
3346 | /* Perform updates in window tree rooted at W. FORCE_P non-zero means | |
3347 | don't stop updating when input is pending. */ | |
3348 | ||
3349 | static int | |
971de7fb | 3350 | update_window_tree (struct window *w, int force_p) |
5f5c8ee5 GM |
3351 | { |
3352 | int paused_p = 0; | |
177c0ea7 | 3353 | |
5f5c8ee5 GM |
3354 | while (w && !paused_p) |
3355 | { | |
3356 | if (!NILP (w->hchild)) | |
3357 | paused_p |= update_window_tree (XWINDOW (w->hchild), force_p); | |
3358 | else if (!NILP (w->vchild)) | |
3359 | paused_p |= update_window_tree (XWINDOW (w->vchild), force_p); | |
3360 | else if (w->must_be_updated_p) | |
3361 | paused_p |= update_window (w, force_p); | |
3362 | ||
3363 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3364 | } | |
3365 | ||
3366 | return paused_p; | |
3367 | } | |
3368 | ||
3369 | ||
3370 | /* Update window W if its flag must_be_updated_p is non-zero. If | |
3371 | FORCE_P is non-zero, don't stop updating if input is pending. */ | |
3372 | ||
3373 | void | |
971de7fb | 3374 | update_single_window (struct window *w, int force_p) |
5f5c8ee5 GM |
3375 | { |
3376 | if (w->must_be_updated_p) | |
3377 | { | |
3378 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
3379 | ||
3380 | /* Record that this is not a frame-based redisplay. */ | |
3381 | set_frame_matrix_frame (NULL); | |
3382 | ||
a2130dbb KS |
3383 | if (redisplay_dont_pause) |
3384 | force_p = 1; | |
d012c62b | 3385 | #if PERIODIC_PREEMPTION_CHECKING |
a2130dbb KS |
3386 | else if (NILP (Vredisplay_preemption_period)) |
3387 | force_p = 1; | |
3388 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
3389 | { |
3390 | EMACS_TIME tm; | |
3391 | double p = XFLOATINT (Vredisplay_preemption_period); | |
3392 | int sec, usec; | |
3393 | ||
3394 | sec = (int) p; | |
3395 | usec = (p - sec) * 1000000; | |
3396 | ||
3397 | EMACS_GET_TIME (tm); | |
3398 | EMACS_SET_SECS_USECS (preemption_period, sec, usec); | |
3399 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
3400 | } | |
3401 | #endif | |
3402 | ||
5f5c8ee5 GM |
3403 | /* Update W. */ |
3404 | update_begin (f); | |
3405 | update_window (w, force_p); | |
3406 | update_end (f); | |
4588ec20 | 3407 | |
5f5c8ee5 GM |
3408 | /* Reset flag in W. */ |
3409 | w->must_be_updated_p = 0; | |
3410 | } | |
3411 | } | |
4588ec20 | 3412 | |
93e023fc | 3413 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 3414 | |
408f5064 GM |
3415 | /* Redraw lines from the current matrix of window W that are |
3416 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
3417 | ||
3418 | static void | |
971de7fb | 3419 | redraw_overlapped_rows (struct window *w, int yb) |
408f5064 | 3420 | { |
d8ee7803 | 3421 | int i; |
fa971ac3 | 3422 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3fc809e2 | 3423 | |
408f5064 GM |
3424 | /* If rows overlapping others have been changed, the rows being |
3425 | overlapped have to be redrawn. This won't draw lines that have | |
3426 | already been drawn in update_window_line because overlapped_p in | |
3427 | desired rows is 0, so after row assignment overlapped_p in | |
3428 | current rows is 0. */ | |
3429 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
3430 | { | |
e876ff42 | 3431 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
3432 | |
3433 | if (!row->enabled_p) | |
3434 | break; | |
3435 | else if (row->mode_line_p) | |
3436 | continue; | |
177c0ea7 | 3437 | |
408f5064 GM |
3438 | if (row->overlapped_p) |
3439 | { | |
3440 | enum glyph_row_area area; | |
177c0ea7 | 3441 | |
408f5064 GM |
3442 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
3443 | { | |
3444 | updated_row = row; | |
3445 | updated_area = area; | |
fa971ac3 KL |
3446 | FRAME_RIF (f)->cursor_to (i, 0, row->y, |
3447 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 3448 | if (row->used[area]) |
fa971ac3 KL |
3449 | FRAME_RIF (f)->write_glyphs (row->glyphs[area], |
3450 | row->used[area]); | |
3451 | FRAME_RIF (f)->clear_end_of_line (-1); | |
408f5064 | 3452 | } |
177c0ea7 | 3453 | |
408f5064 GM |
3454 | row->overlapped_p = 0; |
3455 | } | |
3456 | ||
e876ff42 | 3457 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
3458 | break; |
3459 | } | |
3460 | } | |
3461 | ||
3462 | ||
3463 | /* Redraw lines from the current matrix of window W that overlap | |
3464 | others. YB is bottom-most y-position in W. */ | |
3465 | ||
3466 | static void | |
971de7fb | 3467 | redraw_overlapping_rows (struct window *w, int yb) |
408f5064 GM |
3468 | { |
3469 | int i, bottom_y; | |
3470 | struct glyph_row *row; | |
fa971ac3 | 3471 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
3fc809e2 | 3472 | |
408f5064 GM |
3473 | for (i = 0; i < w->current_matrix->nrows; ++i) |
3474 | { | |
3475 | row = w->current_matrix->rows + i; | |
3476 | ||
3477 | if (!row->enabled_p) | |
3478 | break; | |
3479 | else if (row->mode_line_p) | |
3480 | continue; | |
177c0ea7 | 3481 | |
408f5064 GM |
3482 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
3483 | ||
b4b2c2ca | 3484 | if (row->overlapping_p) |
408f5064 | 3485 | { |
41124e06 YM |
3486 | int overlaps = 0; |
3487 | ||
b4b2c2ca | 3488 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) && i > 0 |
41124e06 YM |
3489 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) |
3490 | overlaps |= OVERLAPS_PRED; | |
b4b2c2ca | 3491 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) && bottom_y < yb |
41124e06 YM |
3492 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) |
3493 | overlaps |= OVERLAPS_SUCC; | |
3494 | ||
3495 | if (overlaps) | |
3496 | { | |
3497 | if (row->used[LEFT_MARGIN_AREA]) | |
3498 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
3499 | ||
3500 | if (row->used[TEXT_AREA]) | |
3501 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
3502 | ||
3503 | if (row->used[RIGHT_MARGIN_AREA]) | |
3504 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
3505 | ||
c5e87d10 | 3506 | /* Record in neighbor rows that ROW overwrites part of |
41124e06 YM |
3507 | their display. */ |
3508 | if (overlaps & OVERLAPS_PRED) | |
3509 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
3510 | if (overlaps & OVERLAPS_SUCC) | |
3511 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
3512 | } | |
408f5064 GM |
3513 | } |
3514 | ||
3515 | if (bottom_y >= yb) | |
3516 | break; | |
3517 | } | |
3518 | } | |
3519 | ||
93e023fc KS |
3520 | #endif /* HAVE_WINDOW_SYSTEM */ |
3521 | ||
408f5064 | 3522 | |
09ad5a91 | 3523 | #if defined GLYPH_DEBUG && 0 |
93962bfa GM |
3524 | |
3525 | /* Check that no row in the current matrix of window W is enabled | |
3526 | which is below what's displayed in the window. */ | |
3527 | ||
09ad5a91 | 3528 | static void |
971de7fb | 3529 | check_current_matrix_flags (struct window *w) |
93962bfa GM |
3530 | { |
3531 | int last_seen_p = 0; | |
3532 | int i, yb = window_text_bottom_y (w); | |
3533 | ||
3534 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
3535 | { | |
3536 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
3537 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3538 | last_seen_p = 1; | |
3539 | else if (last_seen_p && row->enabled_p) | |
3540 | abort (); | |
3541 | } | |
3542 | } | |
3543 | ||
3544 | #endif /* GLYPH_DEBUG */ | |
3545 | ||
3546 | ||
5f5c8ee5 GM |
3547 | /* Update display of window W. FORCE_P non-zero means that we should |
3548 | not stop when detecting pending input. */ | |
3549 | ||
3550 | static int | |
971de7fb | 3551 | update_window (struct window *w, int force_p) |
4588ec20 | 3552 | { |
5f5c8ee5 GM |
3553 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
3554 | int paused_p; | |
d012c62b | 3555 | #if !PERIODIC_PREEMPTION_CHECKING |
5f5c8ee5 | 3556 | int preempt_count = baud_rate / 2400 + 1; |
d012c62b | 3557 | #endif |
597cfb3f | 3558 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
b96fd3e8 | 3559 | #if GLYPH_DEBUG |
5f5c8ee5 | 3560 | /* Check that W's frame doesn't have glyph matrices. */ |
82f4a138 | 3561 | xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 3562 | #endif |
5f5c8ee5 GM |
3563 | |
3564 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb KS |
3565 | #if !PERIODIC_PREEMPTION_CHECKING |
3566 | if (!force_p) | |
a2d5fca0 | 3567 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3568 | #endif |
4588ec20 | 3569 | |
5f5c8ee5 GM |
3570 | /* If forced to complete the update, or if no input is pending, do |
3571 | the update. */ | |
8fd9a666 | 3572 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 3573 | { |
5f5c8ee5 GM |
3574 | struct glyph_row *row, *end; |
3575 | struct glyph_row *mode_line_row; | |
56974e03 | 3576 | struct glyph_row *header_line_row; |
0bc32927 PE |
3577 | int yb, changed_p = 0, mouse_face_overwritten_p = 0; |
3578 | #if ! PERIODIC_PREEMPTION_CHECKING | |
3579 | int n_updated = 0; | |
3580 | #endif | |
5f5c8ee5 GM |
3581 | |
3582 | rif->update_window_begin_hook (w); | |
3583 | yb = window_text_bottom_y (w); | |
5f5c8ee5 GM |
3584 | row = desired_matrix->rows; |
3585 | end = row + desired_matrix->nrows - 1; | |
177c0ea7 | 3586 | |
394305db EZ |
3587 | /* Take note of the header line, if there is one. We will |
3588 | update it below, after updating all of the window's lines. */ | |
5f5c8ee5 | 3589 | if (row->mode_line_p) |
56974e03 GM |
3590 | { |
3591 | header_line_row = row; | |
3592 | ++row; | |
3593 | } | |
3594 | else | |
3595 | header_line_row = NULL; | |
5f5c8ee5 GM |
3596 | |
3597 | /* Update the mode line, if necessary. */ | |
3598 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
3599 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
3600 | { | |
3601 | mode_line_row->y = yb; | |
3602 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
3603 | desired_matrix), |
3604 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3605 | } |
3606 | ||
3607 | /* Find first enabled row. Optimizations in redisplay_internal | |
3608 | may lead to an update with only one row enabled. There may | |
3609 | be also completely empty matrices. */ | |
3610 | while (row < end && !row->enabled_p) | |
3611 | ++row; | |
177c0ea7 | 3612 | |
bfdcafe1 | 3613 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 3614 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
3615 | { |
3616 | int rc = scrolling_window (w, header_line_row != NULL); | |
3617 | if (rc < 0) | |
3618 | { | |
3619 | /* All rows were found to be equal. */ | |
3620 | paused_p = 0; | |
3621 | goto set_cursor; | |
3622 | } | |
3623 | else if (rc > 0) | |
6b61353c KH |
3624 | { |
3625 | /* We've scrolled the display. */ | |
3626 | force_p = 1; | |
3627 | changed_p = 1; | |
3628 | } | |
5f5c8ee5 GM |
3629 | } |
3630 | ||
3631 | /* Update the rest of the lines. */ | |
0bc32927 | 3632 | for (; row < end && (force_p || !input_pending); ++row) |
394305db EZ |
3633 | /* scrolling_window resets the enabled_p flag of the rows it |
3634 | reuses from current_matrix. */ | |
b7412313 | 3635 | if (row->enabled_p) |
5f5c8ee5 GM |
3636 | { |
3637 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
3638 | int i; | |
177c0ea7 | 3639 | |
153a073c | 3640 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
3641 | detect_input_pending. If it's done too often, |
3642 | scrolling large windows with repeated scroll-up | |
3643 | commands will too quickly pause redisplay. */ | |
d012c62b KS |
3644 | #if PERIODIC_PREEMPTION_CHECKING |
3645 | if (!force_p) | |
3646 | { | |
3647 | EMACS_TIME tm, dif; | |
3648 | EMACS_GET_TIME (tm); | |
3649 | EMACS_SUB_TIME (dif, preemption_next_check, tm); | |
3650 | if (EMACS_TIME_NEG_P (dif)) | |
3651 | { | |
3652 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
3653 | if (detect_input_pending_ignore_squeezables ()) |
3654 | break; | |
d012c62b KS |
3655 | } |
3656 | } | |
3657 | #else | |
e87b8809 | 3658 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 3659 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3660 | #endif |
e876ff42 GM |
3661 | changed_p |= update_window_line (w, vpos, |
3662 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3663 | |
3664 | /* Mark all rows below the last visible one in the current | |
3665 | matrix as invalid. This is necessary because of | |
3666 | variable line heights. Consider the case of three | |
3667 | successive redisplays, where the first displays 5 | |
3668 | lines, the second 3 lines, and the third 5 lines again. | |
3669 | If the second redisplay wouldn't mark rows in the | |
3670 | current matrix invalid, the third redisplay might be | |
3671 | tempted to optimize redisplay based on lines displayed | |
3672 | in the first redisplay. */ | |
3673 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3674 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
3675 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
3676 | } | |
3677 | ||
3678 | /* Was display preempted? */ | |
3679 | paused_p = row < end; | |
177c0ea7 | 3680 | |
56974e03 | 3681 | set_cursor: |
177c0ea7 | 3682 | |
6b61353c KH |
3683 | /* Update the header line after scrolling because a new header |
3684 | line would otherwise overwrite lines at the top of the window | |
3685 | that can be scrolled. */ | |
3686 | if (header_line_row && header_line_row->enabled_p) | |
3687 | { | |
3688 | header_line_row->y = 0; | |
3689 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
6b61353c KH |
3690 | } |
3691 | ||
153a073c | 3692 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
3693 | if (!paused_p && !w->pseudo_window_p) |
3694 | { | |
93e023fc | 3695 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
3696 | if (changed_p && rif->fix_overlapping_area) |
3697 | { | |
3698 | redraw_overlapped_rows (w, yb); | |
3699 | redraw_overlapping_rows (w, yb); | |
3700 | } | |
93e023fc | 3701 | #endif |
177c0ea7 | 3702 | |
5f5c8ee5 GM |
3703 | /* Make cursor visible at cursor position of W. */ |
3704 | set_window_cursor_after_update (w); | |
3705 | ||
e876ff42 GM |
3706 | #if 0 /* Check that current matrix invariants are satisfied. This is |
3707 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
3708 | IF_DEBUG (check_matrix_invariants (w)); |
3709 | #endif | |
4588ec20 | 3710 | } |
5f5c8ee5 GM |
3711 | |
3712 | #if GLYPH_DEBUG | |
3713 | /* Remember the redisplay method used to display the matrix. */ | |
3714 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
3715 | #endif | |
408f5064 | 3716 | |
6b61353c KH |
3717 | #ifdef HAVE_WINDOW_SYSTEM |
3718 | update_window_fringes (w, 0); | |
3719 | #endif | |
3720 | ||
56974e03 GM |
3721 | /* End the update of window W. Don't set the cursor if we |
3722 | paused updating the display because in this case, | |
3723 | set_window_cursor_after_update hasn't been called, and | |
3724 | output_cursor doesn't contain the cursor location. */ | |
3725 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); | |
4588ec20 | 3726 | } |
5f5c8ee5 GM |
3727 | else |
3728 | paused_p = 1; | |
3729 | ||
2d5912c1 | 3730 | #if GLYPH_DEBUG |
0cffd9d8 | 3731 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
3732 | add_window_display_history (w, w->current_matrix->method, paused_p); |
3733 | #endif | |
177c0ea7 | 3734 | |
5f5c8ee5 | 3735 | clear_glyph_matrix (desired_matrix); |
408f5064 | 3736 | |
5f5c8ee5 | 3737 | return paused_p; |
4588ec20 JB |
3738 | } |
3739 | ||
b64b3980 | 3740 | |
5f5c8ee5 GM |
3741 | /* Update the display of area AREA in window W, row number VPOS. |
3742 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
3743 | ||
3744 | static void | |
971de7fb | 3745 | update_marginal_area (struct window *w, int area, int vpos) |
b64b3980 | 3746 | { |
5f5c8ee5 | 3747 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 3748 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
3749 | |
3750 | /* Let functions in xterm.c know what area subsequent X positions | |
3751 | will be relative to. */ | |
3752 | updated_area = area; | |
3753 | ||
3754 | /* Set cursor to start of glyphs, write them, and clear to the end | |
3755 | of the area. I don't think that something more sophisticated is | |
3756 | necessary here, since marginal areas will not be the default. */ | |
3757 | rif->cursor_to (vpos, 0, desired_row->y, 0); | |
3758 | if (desired_row->used[area]) | |
3759 | rif->write_glyphs (desired_row->glyphs[area], desired_row->used[area]); | |
3760 | rif->clear_end_of_line (-1); | |
b64b3980 | 3761 | } |
23b0200c | 3762 | |
352f1545 | 3763 | |
408f5064 GM |
3764 | /* Update the display of the text area of row VPOS in window W. |
3765 | Value is non-zero if display has changed. */ | |
5f5c8ee5 | 3766 | |
408f5064 | 3767 | static int |
971de7fb | 3768 | update_text_area (struct window *w, int vpos) |
23b0200c | 3769 | { |
5f5c8ee5 GM |
3770 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
3771 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3772 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 3773 | int changed_p = 0; |
5f5c8ee5 GM |
3774 | |
3775 | /* Let functions in xterm.c know what area subsequent X positions | |
3776 | will be relative to. */ | |
3777 | updated_area = TEXT_AREA; | |
177c0ea7 | 3778 | |
5f5c8ee5 GM |
3779 | /* If rows are at different X or Y, or rows have different height, |
3780 | or the current row is marked invalid, write the entire line. */ | |
3781 | if (!current_row->enabled_p | |
3782 | || desired_row->y != current_row->y | |
3783 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
3784 | || desired_row->phys_ascent != current_row->phys_ascent |
3785 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 3786 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 3787 | || current_row->overlapped_p |
fee8b690 CY |
3788 | /* This next line is necessary for correctly redrawing |
3789 | mouse-face areas after scrolling and other operations. | |
3790 | However, it causes excessive flickering when mouse is moved | |
3791 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
3792 | line doesn't seem to hurt anything. -- cyd. |
3793 | But it is still needed for the header line. -- kfs. */ | |
3794 | || (current_row->mouse_face_p | |
3795 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
3796 | || current_row->x != desired_row->x) |
3797 | { | |
3798 | rif->cursor_to (vpos, 0, desired_row->y, desired_row->x); | |
177c0ea7 | 3799 | |
5f5c8ee5 GM |
3800 | if (desired_row->used[TEXT_AREA]) |
3801 | rif->write_glyphs (desired_row->glyphs[TEXT_AREA], | |
3802 | desired_row->used[TEXT_AREA]); | |
177c0ea7 | 3803 | |
5f5c8ee5 GM |
3804 | /* Clear to end of window. */ |
3805 | rif->clear_end_of_line (-1); | |
408f5064 | 3806 | changed_p = 1; |
60f2f3f1 GM |
3807 | |
3808 | /* This erases the cursor. We do this here because | |
3809 | notice_overwritten_cursor cannot easily check this, which | |
3810 | might indicate that the whole functionality of | |
3811 | notice_overwritten_cursor would better be implemented here. | |
3812 | On the other hand, we need notice_overwritten_cursor as long | |
3813 | as mouse highlighting is done asynchronously outside of | |
3814 | redisplay. */ | |
3815 | if (vpos == w->phys_cursor.vpos) | |
3816 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
3817 | } |
3818 | else | |
3819 | { | |
3820 | int stop, i, x; | |
3821 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
3822 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
e47306e6 | 3823 | int overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 3824 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
91d227d9 | 3825 | int abort_skipping = 0; |
5f5c8ee5 | 3826 | |
78897758 YM |
3827 | /* If the desired row extends its face to the text area end, and |
3828 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
3829 | make sure we write at least one glyph, so that the face |
3830 | extension actually takes place. */ | |
78897758 YM |
3831 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
3832 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
3833 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
3834 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 3835 | --desired_stop_pos; |
177c0ea7 | 3836 | |
5f5c8ee5 GM |
3837 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
3838 | i = 0; | |
3839 | x = desired_row->x; | |
8399f8a0 GM |
3840 | |
3841 | /* Loop over glyphs that current and desired row may have | |
3842 | in common. */ | |
5f5c8ee5 | 3843 | while (i < stop) |
352f1545 | 3844 | { |
91d227d9 | 3845 | int can_skip_p = !abort_skipping; |
177c0ea7 | 3846 | |
5f5c8ee5 | 3847 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
3848 | don't have to be written. We can't skip if the last |
3849 | current glyph overlaps the glyph to its right. For | |
3850 | example, consider a current row of `if ' with the `f' in | |
3851 | Courier bold so that it overlaps the ` ' to its right. | |
3852 | If the desired row is ` ', we would skip over the space | |
3853 | after the `if' and there would remain a pixel from the | |
3854 | `f' on the screen. */ | |
3855 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 3856 | { |
e47306e6 GM |
3857 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
3858 | int left, right; | |
177c0ea7 | 3859 | |
e47306e6 GM |
3860 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
3861 | &left, &right); | |
91d227d9 | 3862 | can_skip_p = (right == 0 && !abort_skipping); |
352f1545 | 3863 | } |
177c0ea7 | 3864 | |
6d950f4c | 3865 | if (can_skip_p) |
352f1545 | 3866 | { |
91d227d9 CY |
3867 | int start_hpos = i; |
3868 | ||
6d950f4c GM |
3869 | while (i < stop |
3870 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
3871 | { | |
3872 | x += desired_glyph->pixel_width; | |
3873 | ++desired_glyph, ++current_glyph, ++i; | |
3874 | } | |
3875 | ||
3876 | /* Consider the case that the current row contains "xxx | |
3877 | ppp ggg" in italic Courier font, and the desired row | |
3878 | is "xxx ggg". The character `p' has lbearing, `g' | |
3879 | has not. The loop above will stop in front of the | |
3880 | first `p' in the current row. If we would start | |
3881 | writing glyphs there, we wouldn't erase the lbearing | |
3882 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 3883 | taken care of by draw_glyphs. */ |
6d950f4c GM |
3884 | if (overlapping_glyphs_p |
3885 | && i > 0 | |
3886 | && i < current_row->used[TEXT_AREA] | |
3887 | && (current_row->used[TEXT_AREA] | |
3888 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 3889 | { |
6d950f4c | 3890 | int left, right; |
177c0ea7 | 3891 | |
6d950f4c GM |
3892 | rif->get_glyph_overhangs (current_glyph, XFRAME (w->frame), |
3893 | &left, &right); | |
3894 | while (left > 0 && i > 0) | |
3895 | { | |
3896 | --i, --desired_glyph, --current_glyph; | |
3897 | x -= desired_glyph->pixel_width; | |
3898 | left -= desired_glyph->pixel_width; | |
3899 | } | |
91d227d9 CY |
3900 | |
3901 | /* Abort the skipping algorithm if we end up before | |
3902 | our starting point, to avoid looping (bug#1070). | |
3903 | This can happen when the lbearing is larger than | |
3904 | the pixel width. */ | |
3905 | abort_skipping = (i < start_hpos); | |
5f5c8ee5 | 3906 | } |
352f1545 | 3907 | } |
177c0ea7 | 3908 | |
5f5c8ee5 GM |
3909 | /* Try to avoid writing the entire rest of the desired row |
3910 | by looking for a resync point. This mainly prevents | |
3911 | mode line flickering in the case the mode line is in | |
3912 | fixed-pitch font, which it usually will be. */ | |
3913 | if (i < desired_row->used[TEXT_AREA]) | |
3914 | { | |
3915 | int start_x = x, start_hpos = i; | |
3916 | struct glyph *start = desired_glyph; | |
3917 | int current_x = x; | |
6d950f4c GM |
3918 | int skip_first_p = !can_skip_p; |
3919 | ||
5f5c8ee5 GM |
3920 | /* Find the next glyph that's equal again. */ |
3921 | while (i < stop | |
6d950f4c GM |
3922 | && (skip_first_p |
3923 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
3924 | && x == current_x) |
3925 | { | |
3926 | x += desired_glyph->pixel_width; | |
3927 | current_x += current_glyph->pixel_width; | |
3928 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 3929 | skip_first_p = 0; |
5f5c8ee5 | 3930 | } |
23b0200c | 3931 | |
5f5c8ee5 GM |
3932 | if (i == start_hpos || x != current_x) |
3933 | { | |
3934 | i = start_hpos; | |
3935 | x = start_x; | |
3936 | desired_glyph = start; | |
3937 | break; | |
3938 | } | |
e47306e6 | 3939 | |
5f5c8ee5 GM |
3940 | rif->cursor_to (vpos, start_hpos, desired_row->y, start_x); |
3941 | rif->write_glyphs (start, i - start_hpos); | |
408f5064 | 3942 | changed_p = 1; |
5f5c8ee5 GM |
3943 | } |
3944 | } | |
177c0ea7 | 3945 | |
5f5c8ee5 GM |
3946 | /* Write the rest. */ |
3947 | if (i < desired_row->used[TEXT_AREA]) | |
3948 | { | |
3949 | rif->cursor_to (vpos, i, desired_row->y, x); | |
3950 | rif->write_glyphs (desired_glyph, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 3951 | changed_p = 1; |
5f5c8ee5 | 3952 | } |
177c0ea7 | 3953 | |
5f5c8ee5 GM |
3954 | /* Maybe clear to end of line. */ |
3955 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
3956 | { | |
3957 | /* If new row extends to the end of the text area, nothing | |
3958 | has to be cleared, if and only if we did a write_glyphs | |
3959 | above. This is made sure by setting desired_stop_pos | |
3960 | appropriately above. */ | |
78897758 YM |
3961 | xassert (i < desired_row->used[TEXT_AREA] |
3962 | || ((desired_row->used[TEXT_AREA] | |
3963 | == current_row->used[TEXT_AREA]) | |
3964 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
3965 | } |
3966 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
3967 | { | |
3968 | /* If old row extends to the end of the text area, clear. */ | |
3969 | if (i >= desired_row->used[TEXT_AREA]) | |
3970 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3971 | desired_row->pixel_width); |
5f5c8ee5 | 3972 | rif->clear_end_of_line (-1); |
408f5064 | 3973 | changed_p = 1; |
5f5c8ee5 GM |
3974 | } |
3975 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 3976 | { |
5f5c8ee5 GM |
3977 | /* Otherwise clear to the end of the old row. Everything |
3978 | after that position should be clear already. */ | |
27786b2f | 3979 | int xlim; |
177c0ea7 | 3980 | |
5f5c8ee5 GM |
3981 | if (i >= desired_row->used[TEXT_AREA]) |
3982 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3983 | desired_row->pixel_width); |
5f5c8ee5 GM |
3984 | |
3985 | /* If cursor is displayed at the end of the line, make sure | |
3986 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
3987 | with which to erase the cursor (because this method | |
3988 | doesn't work with lbearing/rbearing), so we must do it | |
3989 | this way. */ | |
3990 | if (vpos == w->phys_cursor.vpos | |
f951a506 EZ |
3991 | && (desired_row->reversed_p |
3992 | ? (w->phys_cursor.hpos < 0) | |
3993 | : (w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]))) | |
5f5c8ee5 GM |
3994 | { |
3995 | w->phys_cursor_on_p = 0; | |
27786b2f | 3996 | xlim = -1; |
5f5c8ee5 GM |
3997 | } |
3998 | else | |
27786b2f PE |
3999 | xlim = current_row->pixel_width; |
4000 | rif->clear_end_of_line (xlim); | |
408f5064 | 4001 | changed_p = 1; |
2e8907d3 | 4002 | } |
23b0200c | 4003 | } |
408f5064 GM |
4004 | |
4005 | return changed_p; | |
23b0200c | 4006 | } |
4588ec20 | 4007 | |
5f5c8ee5 | 4008 | |
408f5064 GM |
4009 | /* Update row VPOS in window W. Value is non-zero if display has been |
4010 | changed. */ | |
5f5c8ee5 | 4011 | |
408f5064 | 4012 | static int |
971de7fb | 4013 | update_window_line (struct window *w, int vpos, int *mouse_face_overwritten_p) |
5f5c8ee5 GM |
4014 | { |
4015 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
4016 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 4017 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 4018 | int changed_p = 0; |
5f5c8ee5 | 4019 | |
5f5c8ee5 GM |
4020 | /* Set the row being updated. This is important to let xterm.c |
4021 | know what line height values are in effect. */ | |
4022 | updated_row = desired_row; | |
4023 | ||
177c0ea7 JB |
4024 | /* A row can be completely invisible in case a desired matrix was |
4025 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
4026 | the matrix. Make sure to make such rows current anyway, since |
4027 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
4028 | if (desired_row->mode_line_p |
4029 | || desired_row->visible_height > 0) | |
408f5064 | 4030 | { |
504805ac GM |
4031 | xassert (desired_row->enabled_p); |
4032 | ||
4033 | /* Update display of the left margin area, if there is one. */ | |
4034 | if (!desired_row->full_width_p | |
7df02016 | 4035 | && !NILP (w->left_margin_cols)) |
504805ac GM |
4036 | { |
4037 | changed_p = 1; | |
4038 | update_marginal_area (w, LEFT_MARGIN_AREA, vpos); | |
4039 | } | |
177c0ea7 | 4040 | |
504805ac GM |
4041 | /* Update the display of the text area. */ |
4042 | if (update_text_area (w, vpos)) | |
4043 | { | |
4044 | changed_p = 1; | |
4045 | if (current_row->mouse_face_p) | |
4046 | *mouse_face_overwritten_p = 1; | |
4047 | } | |
177c0ea7 | 4048 | |
504805ac GM |
4049 | /* Update display of the right margin area, if there is one. */ |
4050 | if (!desired_row->full_width_p | |
7df02016 | 4051 | && !NILP (w->right_margin_cols)) |
504805ac GM |
4052 | { |
4053 | changed_p = 1; | |
4054 | update_marginal_area (w, RIGHT_MARGIN_AREA, vpos); | |
4055 | } | |
177c0ea7 | 4056 | |
504805ac GM |
4057 | /* Draw truncation marks etc. */ |
4058 | if (!current_row->enabled_p | |
4059 | || desired_row->y != current_row->y | |
4060 | || desired_row->visible_height != current_row->visible_height | |
6b61353c | 4061 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 4062 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
6b61353c | 4063 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 4064 | || desired_row->mode_line_p != current_row->mode_line_p |
6b61353c | 4065 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
4066 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
4067 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
4068 | rif->after_update_window_line_hook (desired_row); | |
408f5064 | 4069 | } |
177c0ea7 | 4070 | |
5f5c8ee5 GM |
4071 | /* Update current_row from desired_row. */ |
4072 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
4073 | updated_row = NULL; | |
408f5064 | 4074 | return changed_p; |
5f5c8ee5 GM |
4075 | } |
4076 | ||
4077 | ||
4078 | /* Set the cursor after an update of window W. This function may only | |
4079 | be called from update_window. */ | |
4080 | ||
4081 | static void | |
971de7fb | 4082 | set_window_cursor_after_update (struct window *w) |
4588ec20 | 4083 | { |
5f5c8ee5 | 4084 | struct frame *f = XFRAME (w->frame); |
fa971ac3 | 4085 | struct redisplay_interface *rif = FRAME_RIF (f); |
5f5c8ee5 GM |
4086 | int cx, cy, vpos, hpos; |
4087 | ||
4088 | /* Not intended for frame matrix updates. */ | |
4089 | xassert (FRAME_WINDOW_P (f)); | |
177c0ea7 | 4090 | |
b96fd3e8 GM |
4091 | if (cursor_in_echo_area |
4092 | && !NILP (echo_area_buffer[0]) | |
4093 | /* If we are showing a message instead of the mini-buffer, | |
4094 | show the cursor for the message instead. */ | |
4095 | && XWINDOW (minibuf_window) == w | |
4096 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
4097 | /* These cases apply only to the frame that contains |
4098 | the active mini-buffer window. */ | |
4099 | && FRAME_HAS_MINIBUF_P (f) | |
4100 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
4101 | { | |
4102 | cx = cy = vpos = hpos = 0; | |
4103 | ||
4104 | if (cursor_in_echo_area >= 0) | |
4105 | { | |
4106 | /* If the mini-buffer is several lines high, find the last | |
4107 | line that has any text on it. Note: either all lines | |
4108 | are enabled or none. Otherwise we wouldn't be able to | |
4109 | determine Y. */ | |
862b4790 GM |
4110 | struct glyph_row *row, *last_row; |
4111 | struct glyph *glyph; | |
4112 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 4113 | |
862b4790 | 4114 | last_row = NULL; |
6206f8ce GM |
4115 | row = w->current_matrix->rows; |
4116 | while (row->enabled_p | |
4117 | && (last_row == NULL | |
4118 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 4119 | { |
862b4790 GM |
4120 | if (row->used[TEXT_AREA] |
4121 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
4122 | last_row = row; | |
6206f8ce | 4123 | ++row; |
862b4790 | 4124 | } |
177c0ea7 | 4125 | |
5f5c8ee5 GM |
4126 | if (last_row) |
4127 | { | |
6206f8ce GM |
4128 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
4129 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 4130 | |
b96fd3e8 | 4131 | while (last > start && last->charpos < 0) |
862b4790 | 4132 | --last; |
177c0ea7 | 4133 | |
862b4790 GM |
4134 | for (glyph = start; glyph < last; ++glyph) |
4135 | { | |
4136 | cx += glyph->pixel_width; | |
4137 | ++hpos; | |
4138 | } | |
4139 | ||
5f5c8ee5 | 4140 | cy = last_row->y; |
862b4790 | 4141 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
4142 | } |
4143 | } | |
4144 | } | |
4145 | else | |
4146 | { | |
4147 | cx = w->cursor.x; | |
4148 | cy = w->cursor.y; | |
4149 | hpos = w->cursor.hpos; | |
4150 | vpos = w->cursor.vpos; | |
4151 | } | |
4588ec20 | 4152 | |
5f5c8ee5 | 4153 | /* Window cursor can be out of sync for horizontally split windows. */ |
f951a506 | 4154 | hpos = max (-1, hpos); /* -1 is for when cursor is on the left fringe */ |
5f5c8ee5 GM |
4155 | hpos = min (w->current_matrix->matrix_w - 1, hpos); |
4156 | vpos = max (0, vpos); | |
4157 | vpos = min (w->current_matrix->nrows - 1, vpos); | |
4158 | rif->cursor_to (vpos, hpos, cy, cx); | |
4588ec20 | 4159 | } |
4588ec20 | 4160 | |
5f5c8ee5 | 4161 | |
6df5d75f GM |
4162 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window |
4163 | tree rooted at W. */ | |
4164 | ||
4165 | void | |
971de7fb | 4166 | set_window_update_flags (struct window *w, int on_p) |
6df5d75f GM |
4167 | { |
4168 | while (w) | |
4169 | { | |
4170 | if (!NILP (w->hchild)) | |
4171 | set_window_update_flags (XWINDOW (w->hchild), on_p); | |
4172 | else if (!NILP (w->vchild)) | |
4173 | set_window_update_flags (XWINDOW (w->vchild), on_p); | |
4174 | else | |
4175 | w->must_be_updated_p = on_p; | |
4176 | ||
4177 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
4178 | } | |
177c0ea7 | 4179 | } |
6df5d75f GM |
4180 | |
4181 | ||
4182 | \f | |
4183 | /*********************************************************************** | |
4184 | Window-Based Scrolling | |
4185 | ***********************************************************************/ | |
4186 | ||
4187 | /* Structure describing rows in scrolling_window. */ | |
4188 | ||
4189 | struct row_entry | |
4190 | { | |
4191 | /* Number of occurrences of this row in desired and current matrix. */ | |
4192 | int old_uses, new_uses; | |
177c0ea7 | 4193 | |
6df5d75f GM |
4194 | /* Vpos of row in new matrix. */ |
4195 | int new_line_number; | |
4196 | ||
4197 | /* Bucket index of this row_entry in the hash table row_table. */ | |
ca9ce8f2 | 4198 | ptrdiff_t bucket; |
177c0ea7 | 4199 | |
6df5d75f GM |
4200 | /* The row described by this entry. */ |
4201 | struct glyph_row *row; | |
177c0ea7 | 4202 | |
6df5d75f GM |
4203 | /* Hash collision chain. */ |
4204 | struct row_entry *next; | |
4205 | }; | |
4206 | ||
4207 | /* A pool to allocate row_entry structures from, and the size of the | |
4208 | pool. The pool is reallocated in scrolling_window when we find | |
4209 | that we need a larger one. */ | |
4210 | ||
4211 | static struct row_entry *row_entry_pool; | |
ca9ce8f2 | 4212 | static ptrdiff_t row_entry_pool_size; |
6df5d75f GM |
4213 | |
4214 | /* Index of next free entry in row_entry_pool. */ | |
4215 | ||
ca9ce8f2 | 4216 | static ptrdiff_t row_entry_idx; |
6df5d75f GM |
4217 | |
4218 | /* The hash table used during scrolling, and the table's size. This | |
4219 | table is used to quickly identify equal rows in the desired and | |
4220 | current matrix. */ | |
4221 | ||
4222 | static struct row_entry **row_table; | |
ca9ce8f2 | 4223 | static ptrdiff_t row_table_size; |
6df5d75f GM |
4224 | |
4225 | /* Vectors of pointers to row_entry structures belonging to the | |
4226 | current and desired matrix, and the size of the vectors. */ | |
4227 | ||
4228 | static struct row_entry **old_lines, **new_lines; | |
0065d054 | 4229 | static ptrdiff_t old_lines_size, new_lines_size; |
6df5d75f GM |
4230 | |
4231 | /* A pool to allocate run structures from, and its size. */ | |
4232 | ||
4233 | static struct run *run_pool; | |
0065d054 | 4234 | static ptrdiff_t runs_size; |
6df5d75f GM |
4235 | |
4236 | /* A vector of runs of lines found during scrolling. */ | |
4237 | ||
4238 | static struct run **runs; | |
4239 | ||
6b1f9ba4 | 4240 | /* Add glyph row ROW to the scrolling hash table. */ |
6df5d75f | 4241 | |
55d4c1b2 | 4242 | static inline struct row_entry * |
6b1f9ba4 | 4243 | add_row_entry (struct glyph_row *row) |
6df5d75f GM |
4244 | { |
4245 | struct row_entry *entry; | |
ca9ce8f2 | 4246 | ptrdiff_t i = row->hash % row_table_size; |
177c0ea7 | 4247 | |
6df5d75f | 4248 | entry = row_table[i]; |
68c95424 | 4249 | xassert (entry || verify_row_hash (row)); |
6b1f9ba4 | 4250 | while (entry && !row_equal_p (entry->row, row, 1)) |
6df5d75f | 4251 | entry = entry->next; |
177c0ea7 | 4252 | |
6df5d75f GM |
4253 | if (entry == NULL) |
4254 | { | |
4255 | entry = row_entry_pool + row_entry_idx++; | |
4256 | entry->row = row; | |
4257 | entry->old_uses = entry->new_uses = 0; | |
4258 | entry->new_line_number = 0; | |
4259 | entry->bucket = i; | |
4260 | entry->next = row_table[i]; | |
4261 | row_table[i] = entry; | |
4262 | } | |
4263 | ||
4264 | return entry; | |
4265 | } | |
4266 | ||
4267 | ||
5f5c8ee5 | 4268 | /* Try to reuse part of the current display of W by scrolling lines. |
153a073c | 4269 | HEADER_LINE_P non-zero means W has a header line. |
5f5c8ee5 GM |
4270 | |
4271 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4272 | Technique for Isolating Differences Between Files." It should take | |
4273 | O(N) time. | |
4274 | ||
4275 | A short outline of the steps of the algorithm | |
4276 | ||
4277 | 1. Skip lines equal at the start and end of both matrices. | |
4278 | ||
4279 | 2. Enter rows in the current and desired matrix into a symbol | |
4280 | table, counting how often they appear in both matrices. | |
4281 | ||
4282 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4283 | i.e. we assume that such lines are likely to have been moved. | |
4284 | ||
4285 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4286 | forward and backward. | |
4287 | ||
4288 | Value is | |
4289 | ||
4290 | -1 if all rows were found to be equal. | |
4291 | 0 to indicate that we did not scroll the display, or | |
4292 | 1 if we did scroll. */ | |
4293 | ||
4294 | static int | |
971de7fb | 4295 | scrolling_window (struct window *w, int header_line_p) |
4588ec20 | 4296 | { |
5f5c8ee5 GM |
4297 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4298 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4299 | int yb = window_text_bottom_y (w); | |
ca9ce8f2 PE |
4300 | ptrdiff_t i; |
4301 | int j, first_old, first_new, last_old, last_new; | |
4302 | int nruns, run_idx; | |
0065d054 | 4303 | ptrdiff_t n; |
6df5d75f | 4304 | struct row_entry *entry; |
fa971ac3 | 4305 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4306 | |
4307 | /* Skip over rows equal at the start. */ | |
bfdcafe1 | 4308 | for (i = header_line_p ? 1 : 0; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4309 | { |
bfdcafe1 GM |
4310 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4311 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4312 | ||
4313 | if (c->enabled_p | |
4314 | && d->enabled_p | |
6b61353c | 4315 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4316 | && c->y == d->y |
4317 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4318 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
6b1f9ba4 | 4319 | && row_equal_p (c, d, 1)) |
bfdcafe1 GM |
4320 | { |
4321 | assign_row (c, d); | |
4322 | d->enabled_p = 0; | |
4323 | } | |
4324 | else | |
4325 | break; | |
5f5c8ee5 | 4326 | } |
4588ec20 | 4327 | |
5f5c8ee5 GM |
4328 | /* Give up if some rows in the desired matrix are not enabled. */ |
4329 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4330 | return -1; | |
177c0ea7 | 4331 | |
5f5c8ee5 GM |
4332 | first_old = first_new = i; |
4333 | ||
4d8ade89 YM |
4334 | /* Set last_new to the index + 1 of the row that reaches the |
4335 | bottom boundary in the desired matrix. Give up if we find a | |
4336 | disabled row before we reach the bottom boundary. */ | |
5f5c8ee5 | 4337 | i = first_new + 1; |
4d8ade89 YM |
4338 | while (i < desired_matrix->nrows - 1) |
4339 | { | |
4340 | int bottom; | |
5f5c8ee5 | 4341 | |
4d8ade89 YM |
4342 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) |
4343 | return 0; | |
4344 | bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)); | |
4345 | if (bottom <= yb) | |
4346 | ++i; | |
4347 | if (bottom >= yb) | |
4348 | break; | |
4349 | } | |
5f5c8ee5 GM |
4350 | |
4351 | last_new = i; | |
4352 | ||
4d8ade89 YM |
4353 | /* Set last_old to the index + 1 of the row that reaches the bottom |
4354 | boundary in the current matrix. We don't look at the enabled | |
4355 | flag here because we plan to reuse part of the display even if | |
4356 | other parts are disabled. */ | |
5f5c8ee5 | 4357 | i = first_old + 1; |
93962bfa GM |
4358 | while (i < current_matrix->nrows - 1) |
4359 | { | |
4360 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4361 | if (bottom <= yb) | |
4362 | ++i; | |
4363 | if (bottom >= yb) | |
4364 | break; | |
4365 | } | |
4366 | ||
5f5c8ee5 GM |
4367 | last_old = i; |
4368 | ||
4369 | /* Skip over rows equal at the bottom. */ | |
4370 | i = last_new; | |
4371 | j = last_old; | |
4372 | while (i - 1 > first_new | |
4373 | && j - 1 > first_old | |
1e5b2111 EZ |
4374 | && MATRIX_ROW (current_matrix, j - 1)->enabled_p |
4375 | && (MATRIX_ROW (current_matrix, j - 1)->y | |
4376 | == MATRIX_ROW (desired_matrix, i - 1)->y) | |
4377 | && !MATRIX_ROW (desired_matrix, i - 1)->redraw_fringe_bitmaps_p | |
6b1f9ba4 | 4378 | && row_equal_p (MATRIX_ROW (desired_matrix, i - 1), |
e4e0bee9 | 4379 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
4380 | --i, --j; |
4381 | last_new = i; | |
4382 | last_old = j; | |
4383 | ||
4384 | /* Nothing to do if all rows are equal. */ | |
4385 | if (last_new == first_new) | |
4386 | return 0; | |
4387 | ||
0065d054 | 4388 | /* Check for integer overflow in size calculation. |
ca9ce8f2 PE |
4389 | |
4390 | If next_almost_prime checks (N) for divisibility by 2..10, then | |
4391 | it can return at most N + 10, e.g., next_almost_prime (1) == 11. | |
4392 | So, set next_almost_prime_increment_max to 10. | |
4393 | ||
4394 | It's just a coincidence that next_almost_prime_increment_max == | |
4395 | NEXT_ALMOST_PRIME_LIMIT - 1. If NEXT_ALMOST_PRIME_LIMIT were | |
4396 | 13, then next_almost_prime_increment_max would be 14, e.g., | |
4397 | because next_almost_prime (113) would be 127. */ | |
4398 | { | |
4399 | verify (NEXT_ALMOST_PRIME_LIMIT == 11); | |
4400 | enum { next_almost_prime_increment_max = 10 }; | |
ca9ce8f2 | 4401 | ptrdiff_t row_table_max = |
0065d054 PE |
4402 | (min (PTRDIFF_MAX, SIZE_MAX) / (3 * sizeof *row_table) |
4403 | - next_almost_prime_increment_max); | |
4404 | ptrdiff_t current_nrows_max = row_table_max - desired_matrix->nrows; | |
4405 | if (current_nrows_max < current_matrix->nrows) | |
ca9ce8f2 PE |
4406 | memory_full (SIZE_MAX); |
4407 | } | |
4408 | ||
6df5d75f | 4409 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 4410 | |
6df5d75f | 4411 | if (current_matrix->nrows > old_lines_size) |
0065d054 PE |
4412 | old_lines = xpalloc (old_lines, &old_lines_size, |
4413 | current_matrix->nrows - old_lines_size, | |
4414 | INT_MAX, sizeof *old_lines); | |
177c0ea7 | 4415 | |
6df5d75f | 4416 | if (desired_matrix->nrows > new_lines_size) |
0065d054 PE |
4417 | new_lines = xpalloc (new_lines, &new_lines_size, |
4418 | desired_matrix->nrows - new_lines_size, | |
4419 | INT_MAX, sizeof *new_lines); | |
6df5d75f | 4420 | |
ca9ce8f2 PE |
4421 | n = desired_matrix->nrows; |
4422 | n += current_matrix->nrows; | |
0065d054 | 4423 | if (row_table_size < 3 * n) |
6df5d75f | 4424 | { |
ca9ce8f2 | 4425 | ptrdiff_t size = next_almost_prime (3 * n); |
0065d054 | 4426 | row_table = xnrealloc (row_table, size, sizeof *row_table); |
ca9ce8f2 | 4427 | row_table_size = size; |
0065d054 | 4428 | memset (row_table, 0, size * sizeof *row_table); |
6df5d75f GM |
4429 | } |
4430 | ||
4431 | if (n > row_entry_pool_size) | |
0065d054 PE |
4432 | row_entry_pool = xpalloc (row_entry_pool, &row_entry_pool_size, |
4433 | n - row_entry_pool_size, | |
4434 | -1, sizeof *row_entry_pool); | |
6df5d75f GM |
4435 | |
4436 | if (desired_matrix->nrows > runs_size) | |
4437 | { | |
0065d054 PE |
4438 | runs = xnrealloc (runs, desired_matrix->nrows, sizeof *runs); |
4439 | run_pool = xnrealloc (run_pool, desired_matrix->nrows, sizeof *run_pool); | |
ca9ce8f2 | 4440 | runs_size = desired_matrix->nrows; |
6df5d75f GM |
4441 | } |
4442 | ||
4443 | nruns = run_idx = 0; | |
4444 | row_entry_idx = 0; | |
4445 | ||
4446 | /* Add rows from the current and desired matrix to the hash table | |
4447 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 4448 | |
5f5c8ee5 GM |
4449 | for (i = first_old; i < last_old; ++i) |
4450 | { | |
4451 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
4452 | { | |
6b1f9ba4 | 4453 | entry = add_row_entry (MATRIX_ROW (current_matrix, i)); |
6df5d75f GM |
4454 | old_lines[i] = entry; |
4455 | ++entry->old_uses; | |
5f5c8ee5 GM |
4456 | } |
4457 | else | |
6df5d75f | 4458 | old_lines[i] = NULL; |
5f5c8ee5 GM |
4459 | } |
4460 | ||
5f5c8ee5 GM |
4461 | for (i = first_new; i < last_new; ++i) |
4462 | { | |
4463 | xassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); | |
6b1f9ba4 | 4464 | entry = add_row_entry (MATRIX_ROW (desired_matrix, i)); |
6df5d75f GM |
4465 | ++entry->new_uses; |
4466 | entry->new_line_number = i; | |
4467 | new_lines[i] = entry; | |
5f5c8ee5 | 4468 | } |
4588ec20 | 4469 | |
5f5c8ee5 GM |
4470 | /* Identify moves based on lines that are unique and equal |
4471 | in both matrices. */ | |
4472 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
4473 | if (old_lines[i] |
4474 | && old_lines[i]->old_uses == 1 | |
4475 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 | 4476 | { |
27786b2f | 4477 | int p, q; |
6df5d75f GM |
4478 | int new_line = old_lines[i]->new_line_number; |
4479 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
4480 | |
4481 | /* Record move. */ | |
4482 | run->current_vpos = i; | |
4483 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
4484 | run->desired_vpos = new_line; | |
4485 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
4486 | run->nrows = 1; | |
4487 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
4488 | ||
4489 | /* Extend backward. */ | |
27786b2f PE |
4490 | p = i - 1; |
4491 | q = new_line - 1; | |
4492 | while (p > first_old | |
4493 | && q > first_new | |
4494 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4495 | { |
27786b2f | 4496 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 JB |
4497 | --run->current_vpos; |
4498 | --run->desired_vpos; | |
5f5c8ee5 GM |
4499 | ++run->nrows; |
4500 | run->height += h; | |
4501 | run->desired_y -= h; | |
4502 | run->current_y -= h; | |
27786b2f | 4503 | --p, --q; |
5f5c8ee5 | 4504 | } |
4588ec20 | 4505 | |
5f5c8ee5 | 4506 | /* Extend forward. */ |
27786b2f PE |
4507 | p = i + 1; |
4508 | q = new_line + 1; | |
4509 | while (p < last_old | |
4510 | && q < last_new | |
4511 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4512 | { |
27786b2f | 4513 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 | 4514 | ++run->nrows; |
5f5c8ee5 | 4515 | run->height += h; |
27786b2f | 4516 | ++p, ++q; |
5f5c8ee5 | 4517 | } |
19dff8dc | 4518 | |
5f5c8ee5 GM |
4519 | /* Insert run into list of all runs. Order runs by copied |
4520 | pixel lines. Note that we record runs that don't have to | |
4521 | be copied because they are already in place. This is done | |
4522 | because we can avoid calling update_window_line in this | |
4523 | case. */ | |
27786b2f | 4524 | for (p = 0; p < nruns && runs[p]->height > run->height; ++p) |
5f5c8ee5 | 4525 | ; |
27786b2f PE |
4526 | for (q = nruns; q > p; --q) |
4527 | runs[q] = runs[q - 1]; | |
4528 | runs[p] = run; | |
5f5c8ee5 GM |
4529 | ++nruns; |
4530 | ||
4531 | i += run->nrows; | |
4532 | } | |
4533 | else | |
4534 | ++i; | |
4588ec20 | 4535 | |
5f5c8ee5 GM |
4536 | /* Do the moves. Do it in a way that we don't overwrite something |
4537 | we want to copy later on. This is not solvable in general | |
4538 | because there is only one display and we don't have a way to | |
4539 | exchange areas on this display. Example: | |
4588ec20 | 4540 | |
5f5c8ee5 GM |
4541 | +-----------+ +-----------+ |
4542 | | A | | B | | |
4543 | +-----------+ --> +-----------+ | |
4544 | | B | | A | | |
4545 | +-----------+ +-----------+ | |
4588ec20 | 4546 | |
5f5c8ee5 GM |
4547 | Instead, prefer bigger moves, and invalidate moves that would |
4548 | copy from where we copied to. */ | |
ea0d86af | 4549 | |
5f5c8ee5 GM |
4550 | for (i = 0; i < nruns; ++i) |
4551 | if (runs[i]->nrows > 0) | |
4552 | { | |
4553 | struct run *r = runs[i]; | |
24e86043 | 4554 | |
5f5c8ee5 GM |
4555 | /* Copy on the display. */ |
4556 | if (r->current_y != r->desired_y) | |
4557 | { | |
989b42d2 | 4558 | rif->clear_window_mouse_face (w); |
5f5c8ee5 | 4559 | rif->scroll_run_hook (w, r); |
1305621b | 4560 | } |
5f5c8ee5 | 4561 | |
1305621b YM |
4562 | /* Truncate runs that copy to where we copied to, and |
4563 | invalidate runs that copy from where we copied to. */ | |
4564 | for (j = nruns - 1; j > i; --j) | |
4565 | { | |
4566 | struct run *p = runs[j]; | |
4567 | int truncated_p = 0; | |
5f5c8ee5 | 4568 | |
1305621b YM |
4569 | if (p->nrows > 0 |
4570 | && p->desired_y < r->desired_y + r->height | |
4571 | && p->desired_y + p->height > r->desired_y) | |
5f5c8ee5 | 4572 | { |
1305621b YM |
4573 | if (p->desired_y < r->desired_y) |
4574 | { | |
4575 | p->nrows = r->desired_vpos - p->desired_vpos; | |
4576 | p->height = r->desired_y - p->desired_y; | |
4577 | truncated_p = 1; | |
4578 | } | |
4579 | else | |
4580 | { | |
4581 | int nrows_copied = (r->desired_vpos + r->nrows | |
4582 | - p->desired_vpos); | |
4583 | ||
4584 | if (p->nrows <= nrows_copied) | |
4585 | p->nrows = 0; | |
4586 | else | |
4587 | { | |
4588 | int height_copied = (r->desired_y + r->height | |
4589 | - p->desired_y); | |
4590 | ||
4591 | p->current_vpos += nrows_copied; | |
4592 | p->desired_vpos += nrows_copied; | |
4593 | p->nrows -= nrows_copied; | |
4594 | p->current_y += height_copied; | |
4595 | p->desired_y += height_copied; | |
4596 | p->height -= height_copied; | |
4597 | truncated_p = 1; | |
4598 | } | |
4599 | } | |
4600 | } | |
177c0ea7 | 4601 | |
1305621b YM |
4602 | if (r->current_y != r->desired_y |
4603 | /* The condition below is equivalent to | |
4604 | ((p->current_y >= r->desired_y | |
5f5c8ee5 | 4605 | && p->current_y < r->desired_y + r->height) |
1305621b | 4606 | || (p->current_y + p->height > r->desired_y |
5f5c8ee5 | 4607 | && (p->current_y + p->height |
1305621b YM |
4608 | <= r->desired_y + r->height))) |
4609 | because we have 0 < p->height <= r->height. */ | |
4610 | && p->current_y < r->desired_y + r->height | |
4611 | && p->current_y + p->height > r->desired_y) | |
4612 | p->nrows = 0; | |
4613 | ||
4614 | /* Reorder runs by copied pixel lines if truncated. */ | |
4615 | if (truncated_p && p->nrows > 0) | |
4616 | { | |
4617 | int k = nruns - 1; | |
4618 | ||
4619 | while (runs[k]->nrows == 0 || runs[k]->height < p->height) | |
4620 | k--; | |
4621 | memmove (runs + j, runs + j + 1, (k - j) * sizeof (*runs)); | |
4622 | runs[k] = p; | |
5f5c8ee5 GM |
4623 | } |
4624 | } | |
ea0d86af | 4625 | |
5f5c8ee5 GM |
4626 | /* Assign matrix rows. */ |
4627 | for (j = 0; j < r->nrows; ++j) | |
4628 | { | |
4629 | struct glyph_row *from, *to; | |
408f5064 | 4630 | int to_overlapped_p; |
e876ff42 | 4631 | |
5f5c8ee5 GM |
4632 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
4633 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 4634 | to_overlapped_p = to->overlapped_p; |
e61124cd | 4635 | from->redraw_fringe_bitmaps_p = from->fringe_bitmap_periodic_p; |
5f5c8ee5 | 4636 | assign_row (to, from); |
1305621b YM |
4637 | /* The above `assign_row' actually does swap, so if we had |
4638 | an overlap in the copy destination of two runs, then | |
4639 | the second run would assign a previously disabled bogus | |
4640 | row. But thanks to the truncation code in the | |
4641 | preceding for-loop, we no longer have such an overlap, | |
4642 | and thus the assigned row should always be enabled. */ | |
4643 | xassert (to->enabled_p); | |
4644 | from->enabled_p = 0; | |
408f5064 | 4645 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
4646 | } |
4647 | } | |
15874c59 | 4648 | |
6df5d75f GM |
4649 | /* Clear the hash table, for the next time. */ |
4650 | for (i = 0; i < row_entry_idx; ++i) | |
4651 | row_table[row_entry_pool[i].bucket] = NULL; | |
4652 | ||
aec1708a PE |
4653 | /* Value is 1 to indicate that we scrolled the display. */ |
4654 | return 0 < nruns; | |
5f5c8ee5 | 4655 | } |
de83c314 | 4656 | |
15874c59 | 4657 | |
4588ec20 | 4658 | \f |
5f5c8ee5 GM |
4659 | /************************************************************************ |
4660 | Frame-Based Updates | |
4661 | ************************************************************************/ | |
4588ec20 | 4662 | |
5f5c8ee5 | 4663 | /* Update the desired frame matrix of frame F. |
4588ec20 | 4664 | |
5f5c8ee5 GM |
4665 | FORCE_P non-zero means that the update should not be stopped by |
4666 | pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling | |
4667 | should not be tried. | |
4668 | ||
4669 | Value is non-zero if update was stopped due to pending input. */ | |
4670 | ||
4671 | static int | |
971de7fb | 4672 | update_frame_1 (struct frame *f, int force_p, int inhibit_id_p) |
4588ec20 | 4673 | { |
5f5c8ee5 GM |
4674 | /* Frame matrices to work on. */ |
4675 | struct glyph_matrix *current_matrix = f->current_matrix; | |
4676 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
4677 | int i; | |
27786b2f | 4678 | int pause_p; |
4588ec20 | 4679 | int preempt_count = baud_rate / 2400 + 1; |
5f5c8ee5 GM |
4680 | |
4681 | xassert (current_matrix && desired_matrix); | |
4588ec20 | 4682 | |
c37e4889 RS |
4683 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
4684 | calculate_costs (f); | |
4685 | ||
d88c2b9e RS |
4686 | if (preempt_count <= 0) |
4687 | preempt_count = 1; | |
4688 | ||
a2130dbb KS |
4689 | #if !PERIODIC_PREEMPTION_CHECKING |
4690 | if (!force_p && detect_input_pending_ignore_squeezables ()) | |
4588ec20 | 4691 | { |
27786b2f | 4692 | pause_p = 1; |
4588ec20 JB |
4693 | goto do_pause; |
4694 | } | |
d012c62b | 4695 | #endif |
4588ec20 | 4696 | |
5f5c8ee5 | 4697 | /* If we cannot insert/delete lines, it's no use trying it. */ |
daf01701 | 4698 | if (!FRAME_LINE_INS_DEL_OK (f)) |
5f5c8ee5 | 4699 | inhibit_id_p = 1; |
7098a0fa | 4700 | |
efb859b4 | 4701 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
4702 | i/d line if just want cursor motion. */ |
4703 | for (i = 0; i < desired_matrix->nrows; i++) | |
4704 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
4705 | break; |
4706 | ||
4707 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
4708 | if (!inhibit_id_p && i < desired_matrix->nrows) |
4709 | force_p |= scrolling (f); | |
4588ec20 JB |
4710 | |
4711 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
4712 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
4713 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 4714 | |
5f5c8ee5 GM |
4715 | /* Now update the rest of the lines. */ |
4716 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 4717 | { |
5f5c8ee5 | 4718 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 4719 | { |
b6a65ac2 | 4720 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
4721 | { |
4722 | /* Flush out every so many lines. | |
4723 | Also flush out if likely to have more than 1k buffered | |
4724 | otherwise. I'm told that some telnet connections get | |
4725 | really screwed by more than 1k output at once. */ | |
fced92f1 CY |
4726 | FILE *display_output = FRAME_TTY (f)->output; |
4727 | if (display_output) | |
4588ec20 | 4728 | { |
fced92f1 CY |
4729 | int outq = PENDING_OUTPUT_COUNT (display_output); |
4730 | if (outq > 900 | |
4731 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
4588ec20 | 4732 | { |
fced92f1 CY |
4733 | fflush (display_output); |
4734 | if (preempt_count == 1) | |
4735 | { | |
a41f8bed | 4736 | #ifdef EMACS_OUTQSIZE |
fced92f1 CY |
4737 | if (EMACS_OUTQSIZE (0, &outq) < 0) |
4738 | /* Probably not a tty. Ignore the error and reset | |
4739 | the outq count. */ | |
4740 | outq = PENDING_OUTPUT_COUNT (FRAME_TTY (f->output)); | |
4588ec20 | 4741 | #endif |
fced92f1 CY |
4742 | outq *= 10; |
4743 | if (baud_rate <= outq && baud_rate > 0) | |
4744 | sleep (outq / baud_rate); | |
4745 | } | |
4588ec20 JB |
4746 | } |
4747 | } | |
4588ec20 JB |
4748 | } |
4749 | ||
d012c62b KS |
4750 | #if PERIODIC_PREEMPTION_CHECKING |
4751 | if (!force_p) | |
4752 | { | |
4753 | EMACS_TIME tm, dif; | |
4754 | EMACS_GET_TIME (tm); | |
4755 | EMACS_SUB_TIME (dif, preemption_next_check, tm); | |
4756 | if (EMACS_TIME_NEG_P (dif)) | |
4757 | { | |
4758 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
4759 | if (detect_input_pending_ignore_squeezables ()) |
4760 | break; | |
d012c62b KS |
4761 | } |
4762 | } | |
4763 | #else | |
4764 | if (!force_p && (i - 1) % preempt_count == 0) | |
a2d5fca0 | 4765 | detect_input_pending_ignore_squeezables (); |
d012c62b | 4766 | #endif |
a2960116 | 4767 | |
5f5c8ee5 | 4768 | update_frame_line (f, i); |
4588ec20 | 4769 | } |
4588ec20 | 4770 | } |
177c0ea7 | 4771 | |
27786b2f | 4772 | pause_p = (i < FRAME_LINES (f) - 1) ? i : 0; |
4588ec20 JB |
4773 | |
4774 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
27786b2f | 4775 | if (!pause_p) |
4588ec20 | 4776 | { |
48cf7030 | 4777 | if ((cursor_in_echo_area |
5f5c8ee5 | 4778 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 4779 | show the cursor for the message instead of for the |
5f5c8ee5 | 4780 | (now hidden) mini-buffer contents. */ |
2577053b RS |
4781 | || (EQ (minibuf_window, selected_window) |
4782 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 4783 | && !NILP (echo_area_buffer[0]))) |
2577053b | 4784 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 4785 | the active mini-buffer window. */ |
2577053b | 4786 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 4787 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 4788 | { |
7df02016 | 4789 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
4790 | int row, col; |
4791 | ||
4792 | if (cursor_in_echo_area < 0) | |
4793 | { | |
5f5c8ee5 GM |
4794 | /* Negative value of cursor_in_echo_area means put |
4795 | cursor at beginning of line. */ | |
648fa17d JB |
4796 | row = top; |
4797 | col = 0; | |
4798 | } | |
1113d9db | 4799 | else |
648fa17d | 4800 | { |
5f5c8ee5 GM |
4801 | /* Positive value of cursor_in_echo_area means put |
4802 | cursor at the end of the prompt. If the mini-buffer | |
4803 | is several lines high, find the last line that has | |
4804 | any text on it. */ | |
7df02016 | 4805 | row = FRAME_LINES (f); |
177c0ea7 | 4806 | do |
648fa17d | 4807 | { |
5f5c8ee5 GM |
4808 | --row; |
4809 | col = 0; | |
177c0ea7 | 4810 | |
5f5c8ee5 GM |
4811 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
4812 | { | |
4813 | /* Frame rows are filled up with spaces that | |
4814 | must be ignored here. */ | |
5f5c8ee5 GM |
4815 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
4816 | row); | |
4817 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
4818 | struct glyph *last = start + r->used[TEXT_AREA]; | |
4819 | ||
4820 | while (last > start | |
4821 | && (last - 1)->charpos < 0) | |
4822 | --last; | |
177c0ea7 | 4823 | |
5f5c8ee5 GM |
4824 | col = last - start; |
4825 | } | |
648fa17d JB |
4826 | } |
4827 | while (row > top && col == 0); | |
4828 | ||
6395da5c | 4829 | /* Make sure COL is not out of range. */ |
868e640e | 4830 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 4831 | { |
6395da5c | 4832 | /* If we have another row, advance cursor into it. */ |
7df02016 | 4833 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 4834 | { |
7df02016 | 4835 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
4836 | row++; |
4837 | } | |
4838 | /* Otherwise move it back in range. */ | |
4839 | else | |
868e640e | 4840 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
4841 | } |
4842 | } | |
4843 | ||
385ed61f | 4844 | cursor_to (f, row, col); |
1113d9db | 4845 | } |
4588ec20 | 4846 | else |
5f5c8ee5 GM |
4847 | { |
4848 | /* We have only one cursor on terminal frames. Use it to | |
4849 | display the cursor of the selected window. */ | |
4850 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
4851 | if (w->cursor.vpos >= 0 |
4852 | /* The cursor vpos may be temporarily out of bounds | |
4853 | in the following situation: There is one window, | |
4854 | with the cursor in the lower half of it. The window | |
4855 | is split, and a message causes a redisplay before | |
4856 | a new cursor position has been computed. */ | |
7df02016 | 4857 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
4858 | { |
4859 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
4860 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
4861 | ||
7df02016 KS |
4862 | if (INTEGERP (w->left_margin_cols)) |
4863 | x += XFASTINT (w->left_margin_cols); | |
177c0ea7 | 4864 | |
7df02016 | 4865 | /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */ |
385ed61f | 4866 | cursor_to (f, y, x); |
5f5c8ee5 GM |
4867 | } |
4868 | } | |
4588ec20 JB |
4869 | } |
4870 | ||
ef1b0ba7 | 4871 | #if !PERIODIC_PREEMPTION_CHECKING |
4588ec20 | 4872 | do_pause: |
ef1b0ba7 | 4873 | #endif |
4588ec20 | 4874 | |
5f5c8ee5 | 4875 | clear_desired_matrices (f); |
27786b2f | 4876 | return pause_p; |
4588ec20 JB |
4877 | } |
4878 | ||
4588ec20 | 4879 | |
5f5c8ee5 | 4880 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 4881 | |
5bf46f05 | 4882 | static int |
971de7fb | 4883 | scrolling (struct frame *frame) |
4588ec20 JB |
4884 | { |
4885 | int unchanged_at_top, unchanged_at_bottom; | |
4886 | int window_size; | |
4887 | int changed_lines; | |
7df02016 KS |
4888 | int *old_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); |
4889 | int *new_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4890 | int *draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4891 | int *old_draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 4892 | register int i; |
7df02016 | 4893 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
4894 | struct glyph_matrix *current_matrix = frame->current_matrix; |
4895 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 4896 | |
5f5c8ee5 GM |
4897 | if (!current_matrix) |
4898 | abort (); | |
4588ec20 | 4899 | |
5f5c8ee5 GM |
4900 | /* Compute hash codes of all the lines. Also calculate number of |
4901 | changed lines, number of unchanged lines at the beginning, and | |
4902 | number of unchanged lines at the end. */ | |
4588ec20 JB |
4903 | changed_lines = 0; |
4904 | unchanged_at_top = 0; | |
7df02016 KS |
4905 | unchanged_at_bottom = FRAME_LINES (frame); |
4906 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
4907 | { |
4908 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 4909 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 4910 | return 0; |
5f5c8ee5 GM |
4911 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
4912 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
4913 | { |
4914 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
4915 | new_hash[i] = old_hash[i]; | |
4916 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
4917 | draw_cost[i] = INFINITY; | |
4918 | } | |
4588ec20 | 4919 | else |
f188b3c4 | 4920 | { |
5f5c8ee5 GM |
4921 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
4922 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 4923 | } |
4588ec20 JB |
4924 | |
4925 | if (old_hash[i] != new_hash[i]) | |
4926 | { | |
4927 | changed_lines++; | |
7df02016 | 4928 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
4929 | } |
4930 | else if (i == unchanged_at_top) | |
4931 | unchanged_at_top++; | |
5f5c8ee5 | 4932 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
4933 | } |
4934 | ||
4935 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
daf01701 | 4936 | if ((!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4937 | && changed_lines < baud_rate / 2400) |
7df02016 | 4938 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
4939 | return 1; |
4940 | ||
7df02016 | 4941 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
4942 | - unchanged_at_bottom); |
4943 | ||
daf01701 | 4944 | if (FRAME_SCROLL_REGION_OK (frame)) |
4588ec20 | 4945 | free_at_end_vpos -= unchanged_at_bottom; |
daf01701 | 4946 | else if (FRAME_MEMORY_BELOW_FRAME (frame)) |
4588ec20 JB |
4947 | free_at_end_vpos = -1; |
4948 | ||
4949 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 4950 | current frame and desired frame, don't bother with i/d calc. */ |
daf01701 | 4951 | if (!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4952 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
4953 | && (window_size >= |
4954 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 4955 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
4956 | old_hash, new_hash, draw_cost))) |
4957 | return 0; | |
4958 | ||
5f5c8ee5 GM |
4959 | if (window_size < 2) |
4960 | return 0; | |
4961 | ||
502b9b64 | 4962 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 4963 | draw_cost + unchanged_at_top - 1, |
190bb91a | 4964 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
4965 | old_hash + unchanged_at_top - 1, |
4966 | new_hash + unchanged_at_top - 1, | |
4967 | free_at_end_vpos - unchanged_at_top); | |
4968 | ||
4969 | return 0; | |
4970 | } | |
4588ec20 | 4971 | |
4588ec20 | 4972 | |
5f5c8ee5 GM |
4973 | /* Count the number of blanks at the start of the vector of glyphs R |
4974 | which is LEN glyphs long. */ | |
4588ec20 | 4975 | |
4588ec20 | 4976 | static int |
971de7fb | 4977 | count_blanks (struct glyph *r, int len) |
4588ec20 | 4978 | { |
5f5c8ee5 | 4979 | int i; |
177c0ea7 | 4980 | |
5f5c8ee5 GM |
4981 | for (i = 0; i < len; ++i) |
4982 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
4983 | break; | |
4984 | ||
4985 | return i; | |
4588ec20 JB |
4986 | } |
4987 | ||
5f5c8ee5 GM |
4988 | |
4989 | /* Count the number of glyphs in common at the start of the glyph | |
4990 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
4991 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
4992 | ||
4588ec20 | 4993 | static int |
971de7fb | 4994 | count_match (struct glyph *str1, struct glyph *end1, struct glyph *str2, struct glyph *end2) |
4588ec20 | 4995 | { |
5f5c8ee5 GM |
4996 | struct glyph *p1 = str1; |
4997 | struct glyph *p2 = str2; | |
177c0ea7 | 4998 | |
5f5c8ee5 GM |
4999 | while (p1 < end1 |
5000 | && p2 < end2 | |
42186983 | 5001 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 5002 | ++p1, ++p2; |
177c0ea7 | 5003 | |
5f5c8ee5 | 5004 | return p1 - str1; |
4588ec20 JB |
5005 | } |
5006 | ||
5f5c8ee5 | 5007 | |
4588ec20 | 5008 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 5009 | |
5e617bc2 | 5010 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS ((f))]) |
4588ec20 | 5011 | |
5f5c8ee5 GM |
5012 | |
5013 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
5014 | ||
4588ec20 | 5015 | static void |
971de7fb | 5016 | update_frame_line (struct frame *f, int vpos) |
4588ec20 | 5017 | { |
5f5c8ee5 | 5018 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
5019 | int tem; |
5020 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
5021 | struct glyph_matrix *current_matrix = f->current_matrix; |
5022 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
5023 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
5024 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
5025 | int must_write_whole_line_p; | |
daf01701 | 5026 | int write_spaces_p = FRAME_MUST_WRITE_SPACES (f); |
c363a1d6 | 5027 | int colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background |
0a894bad GM |
5028 | != FACE_TTY_DEFAULT_BG_COLOR); |
5029 | ||
5030 | if (colored_spaces_p) | |
5031 | write_spaces_p = 1; | |
5f5c8ee5 | 5032 | |
26c63686 GM |
5033 | /* Current row not enabled means it has unknown contents. We must |
5034 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
5035 | must_write_whole_line_p = !current_row->enabled_p; |
5036 | if (must_write_whole_line_p) | |
4588ec20 | 5037 | { |
5f5c8ee5 | 5038 | obody = 0; |
4588ec20 JB |
5039 | olen = 0; |
5040 | } | |
5041 | else | |
5042 | { | |
5f5c8ee5 GM |
5043 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
5044 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 5045 | |
4cecaab8 MB |
5046 | /* Ignore trailing spaces, if we can. */ |
5047 | if (!write_spaces_p) | |
5048 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
5049 | olen--; | |
4588ec20 JB |
5050 | } |
5051 | ||
5f5c8ee5 GM |
5052 | current_row->enabled_p = 1; |
5053 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 5054 | |
5f5c8ee5 GM |
5055 | /* If desired line is empty, just clear the line. */ |
5056 | if (!desired_row->enabled_p) | |
4588ec20 JB |
5057 | { |
5058 | nlen = 0; | |
5059 | goto just_erase; | |
5060 | } | |
5061 | ||
5f5c8ee5 GM |
5062 | nbody = desired_row->glyphs[TEXT_AREA]; |
5063 | nlen = desired_row->used[TEXT_AREA]; | |
5064 | nend = nbody + nlen; | |
5065 | ||
5066 | /* If display line has unknown contents, write the whole line. */ | |
5067 | if (must_write_whole_line_p) | |
5068 | { | |
26c63686 | 5069 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 5070 | if (!write_spaces_p) |
74ca462f GM |
5071 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
5072 | --nlen; | |
5073 | ||
26c63686 | 5074 | /* Write the contents of the desired line. */ |
74ca462f | 5075 | if (nlen) |
26c63686 | 5076 | { |
385ed61f KL |
5077 | cursor_to (f, vpos, 0); |
5078 | write_glyphs (f, nbody, nlen); | |
26c63686 | 5079 | } |
177c0ea7 | 5080 | |
26c63686 GM |
5081 | /* Don't call clear_end_of_line if we already wrote the whole |
5082 | line. The cursor will not be at the right margin in that | |
5083 | case but in the line below. */ | |
7df02016 | 5084 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 | 5085 | { |
385ed61f KL |
5086 | cursor_to (f, vpos, nlen); |
5087 | clear_end_of_line (f, FRAME_TOTAL_COLS (f)); | |
26c63686 | 5088 | } |
58827478 GM |
5089 | else |
5090 | /* Make sure we are in the right row, otherwise cursor movement | |
5091 | with cmgoto might use `ch' in the wrong row. */ | |
385ed61f | 5092 | cursor_to (f, vpos, 0); |
177c0ea7 | 5093 | |
5f5c8ee5 GM |
5094 | make_current (desired_matrix, current_matrix, vpos); |
5095 | return; | |
5096 | } | |
4588ec20 JB |
5097 | |
5098 | /* Pretend trailing spaces are not there at all, | |
5099 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
5100 | if (!write_spaces_p) |
5101 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
5102 | nlen--; | |
4588ec20 JB |
5103 | |
5104 | /* If there's no i/d char, quickly do the best we can without it. */ | |
daf01701 | 5105 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
4588ec20 | 5106 | { |
5f5c8ee5 | 5107 | int i, j; |
4588ec20 | 5108 | |
5f5c8ee5 GM |
5109 | /* Find the first glyph in desired row that doesn't agree with |
5110 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
5111 | for (i = 0; i < nlen; i++) |
5112 | { | |
5f5c8ee5 | 5113 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 5114 | { |
5f5c8ee5 GM |
5115 | /* Find the end of the run of different glyphs. */ |
5116 | j = i + 1; | |
5117 | while (j < nlen | |
5118 | && (j >= olen | |
5119 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
5120 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
5121 | ++j; | |
177c0ea7 JB |
5122 | |
5123 | /* Output this run of non-matching chars. */ | |
385ed61f KL |
5124 | cursor_to (f, vpos, i); |
5125 | write_glyphs (f, nbody + i, j - i); | |
5f5c8ee5 | 5126 | i = j - 1; |
4588ec20 JB |
5127 | |
5128 | /* Now find the next non-match. */ | |
5129 | } | |
5130 | } | |
5131 | ||
5132 | /* Clear the rest of the line, or the non-clear part of it. */ | |
5133 | if (olen > nlen) | |
5134 | { | |
385ed61f KL |
5135 | cursor_to (f, vpos, nlen); |
5136 | clear_end_of_line (f, olen); | |
4588ec20 JB |
5137 | } |
5138 | ||
5f5c8ee5 GM |
5139 | /* Make current row = desired row. */ |
5140 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
5141 | return; |
5142 | } | |
5143 | ||
5f5c8ee5 GM |
5144 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
5145 | characters in a row. */ | |
5146 | ||
4588ec20 JB |
5147 | if (!olen) |
5148 | { | |
5f5c8ee5 GM |
5149 | /* If current line is blank, skip over initial spaces, if |
5150 | possible, and write the rest. */ | |
4cecaab8 | 5151 | if (write_spaces_p) |
5f5c8ee5 GM |
5152 | nsp = 0; |
5153 | else | |
5154 | nsp = count_blanks (nbody, nlen); | |
5155 | ||
4588ec20 JB |
5156 | if (nlen > nsp) |
5157 | { | |
385ed61f KL |
5158 | cursor_to (f, vpos, nsp); |
5159 | write_glyphs (f, nbody + nsp, nlen - nsp); | |
4588ec20 JB |
5160 | } |
5161 | ||
502b9b64 | 5162 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 5163 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
5164 | return; |
5165 | } | |
5166 | ||
4588ec20 | 5167 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 5168 | osp = count_blanks (obody, olen); |
4cecaab8 | 5169 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 5170 | |
5f5c8ee5 GM |
5171 | /* Compute number of matching chars starting with first non-blank. */ |
5172 | begmatch = count_match (obody + osp, obody + olen, | |
5173 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
5174 | |
5175 | /* Spaces in new match implicit space past the end of old. */ | |
5176 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 5177 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
5178 | { |
5179 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
5180 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
5181 | ++begmatch; | |
4588ec20 JB |
5182 | } |
5183 | ||
5184 | /* Avoid doing insert/delete char | |
5185 | just cause number of leading spaces differs | |
5f5c8ee5 | 5186 | when the following text does not match. */ |
4588ec20 JB |
5187 | if (begmatch == 0 && osp != nsp) |
5188 | osp = nsp = min (osp, nsp); | |
5189 | ||
5190 | /* Find matching characters at end of line */ | |
5191 | op1 = obody + olen; | |
5192 | np1 = nbody + nlen; | |
5193 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
5194 | while (op1 > op2 |
5195 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
5196 | { |
5197 | op1--; | |
5198 | np1--; | |
5199 | } | |
5200 | endmatch = obody + olen - op1; | |
5201 | ||
4588ec20 JB |
5202 | /* tem gets the distance to insert or delete. |
5203 | endmatch is how many characters we save by doing so. | |
5204 | Is it worth it? */ | |
5205 | ||
5206 | tem = (nlen - nsp) - (olen - osp); | |
5207 | if (endmatch && tem | |
daf01701 | 5208 | && (!FRAME_CHAR_INS_DEL_OK (f) |
8a56675d | 5209 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
5210 | endmatch = 0; |
5211 | ||
5212 | /* nsp - osp is the distance to insert or delete. | |
5213 | If that is nonzero, begmatch is known to be nonzero also. | |
5214 | begmatch + endmatch is how much we save by doing the ins/del. | |
5215 | Is it worth it? */ | |
5216 | ||
5217 | if (nsp != osp | |
daf01701 | 5218 | && (!FRAME_CHAR_INS_DEL_OK (f) |
c363a1d6 | 5219 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
5220 | { |
5221 | begmatch = 0; | |
5222 | endmatch = 0; | |
5223 | osp = nsp = min (osp, nsp); | |
5224 | } | |
5225 | ||
5226 | /* Now go through the line, inserting, writing and | |
5227 | deleting as appropriate. */ | |
5228 | ||
5229 | if (osp > nsp) | |
5230 | { | |
385ed61f KL |
5231 | cursor_to (f, vpos, nsp); |
5232 | delete_glyphs (f, osp - nsp); | |
4588ec20 JB |
5233 | } |
5234 | else if (nsp > osp) | |
5235 | { | |
5236 | /* If going to delete chars later in line | |
5237 | and insert earlier in the line, | |
5238 | must delete first to avoid losing data in the insert */ | |
5239 | if (endmatch && nlen < olen + nsp - osp) | |
5240 | { | |
385ed61f KL |
5241 | cursor_to (f, vpos, nlen - endmatch + osp - nsp); |
5242 | delete_glyphs (f, olen + nsp - osp - nlen); | |
4588ec20 JB |
5243 | olen = nlen - (nsp - osp); |
5244 | } | |
385ed61f KL |
5245 | cursor_to (f, vpos, osp); |
5246 | insert_glyphs (f, 0, nsp - osp); | |
4588ec20 JB |
5247 | } |
5248 | olen += nsp - osp; | |
5249 | ||
5250 | tem = nsp + begmatch + endmatch; | |
5251 | if (nlen != tem || olen != tem) | |
5252 | { | |
4588ec20 JB |
5253 | if (!endmatch || nlen == olen) |
5254 | { | |
c363a1d6 GM |
5255 | /* If new text being written reaches right margin, there is |
5256 | no need to do clear-to-eol at the end of this function | |
5257 | (and it would not be safe, since cursor is not going to | |
5258 | be "at the margin" after the text is done). */ | |
7df02016 | 5259 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 5260 | olen = 0; |
c363a1d6 GM |
5261 | |
5262 | /* Function write_glyphs is prepared to do nothing | |
5263 | if passed a length <= 0. Check it here to avoid | |
5264 | unnecessary cursor movement. */ | |
5265 | if (nlen - tem > 0) | |
5266 | { | |
385ed61f KL |
5267 | cursor_to (f, vpos, nsp + begmatch); |
5268 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
c363a1d6 | 5269 | } |
4588ec20 JB |
5270 | } |
5271 | else if (nlen > olen) | |
5272 | { | |
24e86043 KH |
5273 | /* Here, we used to have the following simple code: |
5274 | ---------------------------------------- | |
5275 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
5276 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
5277 | ---------------------------------------- | |
5278 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
5279 | is a padding glyph. */ | |
5280 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
5281 | int del; | |
5f5c8ee5 | 5282 | |
385ed61f | 5283 | cursor_to (f, vpos, nsp + begmatch); |
177c0ea7 | 5284 | |
5f5c8ee5 | 5285 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
5286 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
5287 | out--; | |
385ed61f | 5288 | write_glyphs (f, nbody + nsp + begmatch, out); |
177c0ea7 | 5289 | |
5f5c8ee5 GM |
5290 | /* If we left columns to be overwritten, we must delete them. */ |
5291 | del = olen - tem - out; | |
c363a1d6 | 5292 | if (del > 0) |
385ed61f | 5293 | delete_glyphs (f, del); |
177c0ea7 | 5294 | |
5f5c8ee5 | 5295 | /* At last, we insert columns not yet written out. */ |
385ed61f | 5296 | insert_glyphs (f, nbody + nsp + begmatch + out, nlen - olen + del); |
5f5c8ee5 GM |
5297 | olen = nlen; |
5298 | } | |
5299 | else if (olen > nlen) | |
5300 | { | |
385ed61f KL |
5301 | cursor_to (f, vpos, nsp + begmatch); |
5302 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
5303 | delete_glyphs (f, olen - nlen); | |
5f5c8ee5 GM |
5304 | olen = nlen; |
5305 | } | |
bd9e3e75 | 5306 | } |
5f5c8ee5 GM |
5307 | |
5308 | just_erase: | |
5309 | /* If any unerased characters remain after the new line, erase them. */ | |
5310 | if (olen > nlen) | |
078b3696 | 5311 | { |
385ed61f KL |
5312 | cursor_to (f, vpos, nlen); |
5313 | clear_end_of_line (f, olen); | |
078b3696 | 5314 | } |
5f5c8ee5 GM |
5315 | |
5316 | /* Exchange contents between current_frame and new_frame. */ | |
5317 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5318 | } |
5f5c8ee5 GM |
5319 | |
5320 | ||
078b3696 | 5321 | \f |
5f5c8ee5 GM |
5322 | /*********************************************************************** |
5323 | X/Y Position -> Buffer Position | |
5324 | ***********************************************************************/ | |
5325 | ||
a1b0a6db | 5326 | /* Determine what's under window-relative pixel position (*X, *Y). |
2396cbba | 5327 | Return the OBJECT (string or buffer) that's there. |
6b61353c | 5328 | Return in *POS the position in that object. |
2396cbba EZ |
5329 | Adjust *X and *Y to character positions. |
5330 | Return in *DX and *DY the pixel coordinates of the click, | |
5331 | relative to the top left corner of OBJECT, or relative to | |
5332 | the top left corner of the character glyph at (*X, *Y) | |
5333 | if OBJECT is nil. | |
5334 | Return WIDTH and HEIGHT of the object at (*X, *Y), or zero | |
5335 | if the coordinates point to an empty area of the display. */ | |
5f5c8ee5 | 5336 | |
6b61353c | 5337 | Lisp_Object |
971de7fb | 5338 | 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 | 5339 | { |
5f5c8ee5 | 5340 | struct it it; |
707ea971 | 5341 | Lisp_Object old_current_buffer = Fcurrent_buffer (); |
5f5c8ee5 | 5342 | struct text_pos startp; |
6b61353c KH |
5343 | Lisp_Object string; |
5344 | struct glyph_row *row; | |
cedd7cd9 KS |
5345 | #ifdef HAVE_WINDOW_SYSTEM |
5346 | struct image *img = 0; | |
5347 | #endif | |
2396cbba | 5348 | int x0, x1, to_x; |
57b3e30b | 5349 | void *itdata = NULL; |
5f5c8ee5 | 5350 | |
707ea971 CY |
5351 | /* We used to set current_buffer directly here, but that does the |
5352 | wrong thing with `face-remapping-alist' (bug#2044). */ | |
5353 | Fset_buffer (w->buffer); | |
57b3e30b | 5354 | itdata = bidi_shelve_cache (); |
5f5c8ee5 GM |
5355 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
5356 | CHARPOS (startp) = min (ZV, max (BEGV, CHARPOS (startp))); | |
5357 | BYTEPOS (startp) = min (ZV_BYTE, max (BEGV_BYTE, BYTEPOS (startp))); | |
5358 | start_display (&it, w, startp); | |
352ec8ff EZ |
5359 | /* start_display takes into account the header-line row, but IT's |
5360 | vpos still counts from the glyph row that includes the window's | |
5361 | start position. Adjust for a possible header-line row. */ | |
5362 | it.vpos += WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; | |
177c0ea7 | 5363 | |
9173a8fb | 5364 | x0 = *x; |
2396cbba EZ |
5365 | |
5366 | /* First, move to the beginning of the row corresponding to *Y. We | |
5367 | need to be in that row to get the correct value of base paragraph | |
40629f17 | 5368 | direction for the text at (*X, *Y). */ |
2396cbba EZ |
5369 | move_it_to (&it, -1, 0, *y, -1, MOVE_TO_X | MOVE_TO_Y); |
5370 | ||
5371 | /* TO_X is the pixel position that the iterator will compute for the | |
40629f17 EZ |
5372 | glyph at *X. We add it.first_visible_x because iterator |
5373 | positions include the hscroll. */ | |
2396cbba EZ |
5374 | to_x = x0 + it.first_visible_x; |
5375 | if (it.bidi_it.paragraph_dir == R2L) | |
5376 | /* For lines in an R2L paragraph, we need to mirror TO_X wrt the | |
5377 | text area. This is because the iterator, even in R2L | |
5378 | paragraphs, delivers glyphs as if they started at the left | |
5379 | margin of the window. (When we actually produce glyphs for | |
5380 | display, we reverse their order in PRODUCE_GLYPHS, but the | |
5381 | iterator doesn't know about that.) The following line adjusts | |
5382 | the pixel position to the iterator geometry, which is what | |
40629f17 EZ |
5383 | move_it_* routines use. (The -1 is because in a window whose |
5384 | text-area width is W, the rightmost pixel position is W-1, and | |
5385 | it should be mirrored into zero pixel position.) */ | |
5386 | to_x = window_box_width (w, TEXT_AREA) - to_x - 1; | |
5387 | ||
5388 | /* Now move horizontally in the row to the glyph under *X. Second | |
5389 | argument is ZV to prevent move_it_in_display_line from matching | |
5390 | based on buffer positions. */ | |
2396cbba | 5391 | move_it_in_display_line (&it, ZV, to_x, MOVE_TO_X); |
35928349 | 5392 | bidi_unshelve_cache (itdata, 0); |
177c0ea7 | 5393 | |
707ea971 | 5394 | Fset_buffer (old_current_buffer); |
a1b0a6db | 5395 | |
6b61353c KH |
5396 | *dx = x0 + it.first_visible_x - it.current_x; |
5397 | *dy = *y - it.current_y; | |
5398 | ||
5399 | string = w->buffer; | |
5400 | if (STRINGP (it.string)) | |
5401 | string = it.string; | |
a1b0a6db | 5402 | *pos = it.current; |
86282aab KH |
5403 | if (it.what == IT_COMPOSITION |
5404 | && it.cmp_it.nchars > 1 | |
5405 | && it.cmp_it.reversed_p) | |
5406 | { | |
5407 | /* The current display element is a grapheme cluster in a | |
5408 | composition. In that case, we need the position of the first | |
5409 | character of the cluster. But, as it.cmp_it.reversed_p is 1, | |
5410 | it.current points to the last character of the cluster, thus | |
5411 | we must move back to the first character of the same | |
5412 | cluster. */ | |
5413 | CHARPOS (pos->pos) -= it.cmp_it.nchars - 1; | |
5414 | if (STRINGP (it.string)) | |
5415 | BYTEPOS (pos->pos) = string_char_to_byte (string, CHARPOS (pos->pos)); | |
5416 | else | |
425cc014 EZ |
5417 | BYTEPOS (pos->pos) = buf_charpos_to_bytepos (XBUFFER (w->buffer), |
5418 | CHARPOS (pos->pos)); | |
86282aab | 5419 | } |
6b61353c KH |
5420 | |
5421 | #ifdef HAVE_WINDOW_SYSTEM | |
5422 | if (it.what == IT_IMAGE) | |
5423 | { | |
6b61353c KH |
5424 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5425 | && !NILP (img->spec)) | |
5426 | *object = img->spec; | |
5427 | } | |
5428 | #endif | |
5429 | ||
b70d98e1 KS |
5430 | if (it.vpos < w->current_matrix->nrows |
5431 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5432 | row->enabled_p)) | |
6b61353c KH |
5433 | { |
5434 | if (it.hpos < row->used[TEXT_AREA]) | |
5435 | { | |
5436 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6b61353c | 5437 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5438 | if (img) |
5439 | { | |
5440 | *dy -= row->ascent - glyph->ascent; | |
4be9765d KH |
5441 | *dx += glyph->slice.img.x; |
5442 | *dy += glyph->slice.img.y; | |
cedd7cd9 KS |
5443 | /* Image slices positions are still relative to the entire image */ |
5444 | *width = img->width; | |
5445 | *height = img->height; | |
5446 | } | |
5447 | else | |
6b61353c | 5448 | #endif |
cedd7cd9 KS |
5449 | { |
5450 | *width = glyph->pixel_width; | |
5451 | *height = glyph->ascent + glyph->descent; | |
5452 | } | |
6b61353c KH |
5453 | } |
5454 | else | |
5455 | { | |
5456 | *width = 0; | |
5457 | *height = row->height; | |
5458 | } | |
5459 | } | |
5460 | else | |
5461 | { | |
5462 | *width = *height = 0; | |
5463 | } | |
5464 | ||
5465 | /* Add extra (default width) columns if clicked after EOL. */ | |
5e617bc2 | 5466 | x1 = max (0, it.current_x + it.pixel_width - it.first_visible_x); |
6b61353c KH |
5467 | if (x0 > x1) |
5468 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5469 | ||
5470 | *x = it.hpos; | |
5471 | *y = it.vpos; | |
5472 | ||
5473 | return string; | |
5f5c8ee5 | 5474 | } |
4588ec20 | 5475 | |
5f5c8ee5 GM |
5476 | |
5477 | /* Value is the string under window-relative coordinates X/Y in the | |
6b61353c KH |
5478 | mode line or header line (PART says which) of window W, or nil if none. |
5479 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
5480 | |
5481 | Lisp_Object | |
ace1712c | 5482 | mode_line_string (struct window *w, enum window_part part, |
d311d28c | 5483 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5484 | int *dx, int *dy, int *width, int *height) |
5f5c8ee5 GM |
5485 | { |
5486 | struct glyph_row *row; | |
5487 | struct glyph *glyph, *end; | |
6b61353c | 5488 | int x0, y0; |
5f5c8ee5 GM |
5489 | Lisp_Object string = Qnil; |
5490 | ||
641bdbf3 | 5491 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
5492 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
5493 | else | |
045dee35 | 5494 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
6b61353c KH |
5495 | y0 = *y - row->y; |
5496 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
5f5c8ee5 GM |
5497 | |
5498 | if (row->mode_line_p && row->enabled_p) | |
4588ec20 | 5499 | { |
5f5c8ee5 GM |
5500 | /* Find the glyph under X. If we find one with a string object, |
5501 | it's the one we were looking for. */ | |
5502 | glyph = row->glyphs[TEXT_AREA]; | |
5503 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 5504 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5505 | x0 -= glyph->pixel_width; |
5506 | *x = glyph - row->glyphs[TEXT_AREA]; | |
5507 | if (glyph < end) | |
5508 | { | |
5509 | string = glyph->object; | |
5510 | *charpos = glyph->charpos; | |
5511 | *width = glyph->pixel_width; | |
5512 | *height = glyph->ascent + glyph->descent; | |
5513 | #ifdef HAVE_WINDOW_SYSTEM | |
5514 | if (glyph->type == IMAGE_GLYPH) | |
5515 | { | |
5516 | struct image *img; | |
5517 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5518 | if (img != NULL) | |
5519 | *object = img->spec; | |
5520 | y0 -= row->ascent - glyph->ascent; | |
5521 | } | |
5522 | #endif | |
5523 | } | |
5524 | else | |
5525 | { | |
5526 | /* Add extra (default width) columns if clicked after EOL. */ | |
5527 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5528 | *width = 0; | |
5529 | *height = row->height; | |
5530 | } | |
5531 | } | |
5532 | else | |
5533 | { | |
5534 | *x = 0; | |
5535 | x0 = 0; | |
5536 | *width = *height = 0; | |
4588ec20 | 5537 | } |
5f5c8ee5 | 5538 | |
6b61353c KH |
5539 | *dx = x0; |
5540 | *dy = y0; | |
5541 | ||
5f5c8ee5 | 5542 | return string; |
4588ec20 | 5543 | } |
5f5c8ee5 GM |
5544 | |
5545 | ||
db1db309 GM |
5546 | /* Value is the string under window-relative coordinates X/Y in either |
5547 | marginal area, or nil if none. *CHARPOS is set to the position in | |
5548 | the string returned. */ | |
5549 | ||
5550 | Lisp_Object | |
ace1712c | 5551 | marginal_area_string (struct window *w, enum window_part part, |
d311d28c | 5552 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5553 | int *dx, int *dy, int *width, int *height) |
db1db309 GM |
5554 | { |
5555 | struct glyph_row *row = w->current_matrix->rows; | |
5556 | struct glyph *glyph, *end; | |
6b61353c | 5557 | int x0, y0, i, wy = *y; |
641bdbf3 | 5558 | int area; |
db1db309 GM |
5559 | Lisp_Object string = Qnil; |
5560 | ||
641bdbf3 | 5561 | if (part == ON_LEFT_MARGIN) |
db1db309 | 5562 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 5563 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
5564 | area = RIGHT_MARGIN_AREA; |
5565 | else | |
5566 | abort (); | |
5567 | ||
5568 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
5569 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
5570 | break; | |
6b61353c KH |
5571 | y0 = *y - row->y; |
5572 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
db1db309 GM |
5573 | |
5574 | if (row->enabled_p) | |
5575 | { | |
5576 | /* Find the glyph under X. If we find one with a string object, | |
5577 | it's the one we were looking for. */ | |
db1db309 | 5578 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 5579 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5580 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5581 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) |
5582 | + window_box_width (w, LEFT_MARGIN_AREA) | |
5583 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 5584 | else |
7df02016 | 5585 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5586 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5587 | : 0); |
5588 | ||
6b61353c KH |
5589 | glyph = row->glyphs[area]; |
5590 | end = glyph + row->used[area]; | |
cfde341f | 5591 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5592 | x0 -= glyph->pixel_width; |
5593 | *x = glyph - row->glyphs[area]; | |
5594 | if (glyph < end) | |
5595 | { | |
5596 | string = glyph->object; | |
5597 | *charpos = glyph->charpos; | |
5598 | *width = glyph->pixel_width; | |
5599 | *height = glyph->ascent + glyph->descent; | |
5600 | #ifdef HAVE_WINDOW_SYSTEM | |
5601 | if (glyph->type == IMAGE_GLYPH) | |
5602 | { | |
5603 | struct image *img; | |
5604 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5605 | if (img != NULL) | |
5606 | *object = img->spec; | |
5607 | y0 -= row->ascent - glyph->ascent; | |
4be9765d KH |
5608 | x0 += glyph->slice.img.x; |
5609 | y0 += glyph->slice.img.y; | |
6b61353c KH |
5610 | } |
5611 | #endif | |
5612 | } | |
5613 | else | |
5614 | { | |
5615 | /* Add extra (default width) columns if clicked after EOL. */ | |
5616 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5617 | *width = 0; | |
5618 | *height = row->height; | |
5619 | } | |
db1db309 | 5620 | } |
6b61353c KH |
5621 | else |
5622 | { | |
5623 | x0 = 0; | |
5624 | *x = 0; | |
5625 | *width = *height = 0; | |
5626 | } | |
5627 | ||
5628 | *dx = x0; | |
5629 | *dy = y0; | |
db1db309 GM |
5630 | |
5631 | return string; | |
5632 | } | |
5633 | ||
5634 | ||
5f5c8ee5 GM |
5635 | /*********************************************************************** |
5636 | Changing Frame Sizes | |
5637 | ***********************************************************************/ | |
4588ec20 JB |
5638 | |
5639 | #ifdef SIGWINCH | |
5f5c8ee5 | 5640 | |
9af30bdf | 5641 | static void |
971de7fb DN |
5642 | window_change_signal (int signalnum) /* If we don't have an argument, */ |
5643 | /* some compilers complain in signal calls. */ | |
4588ec20 JB |
5644 | { |
5645 | int width, height; | |
4588ec20 JB |
5646 | int old_errno = errno; |
5647 | ||
28d7d09f | 5648 | struct tty_display_info *tty; |
4d553a13 | 5649 | |
333f1b6f JD |
5650 | signal (SIGWINCH, window_change_signal); |
5651 | SIGNAL_THREAD_CHECK (signalnum); | |
5652 | ||
9628b887 KL |
5653 | /* The frame size change obviously applies to a single |
5654 | termcap-controlled terminal, but we can't decide which. | |
5655 | Therefore, we resize the frames corresponding to each tty. | |
9628b887 KL |
5656 | */ |
5657 | for (tty = tty_list; tty; tty = tty->next) { | |
4588ec20 | 5658 | |
0a125897 KL |
5659 | if (! tty->term_initted) |
5660 | continue; | |
4588ec20 | 5661 | |
db878925 DN |
5662 | /* Suspended tty frames have tty->input == NULL avoid trying to |
5663 | use it. */ | |
5664 | if (!tty->input) | |
5665 | continue; | |
5666 | ||
0b0d3e0b | 5667 | get_tty_size (fileno (tty->input), &width, &height); |
3fc809e2 | 5668 | |
bedeffcf | 5669 | if (width > 5 && height > 2) { |
9628b887 | 5670 | Lisp_Object tail, frame; |
3fc809e2 | 5671 | |
9628b887 | 5672 | FOR_EACH_FRAME (tail, frame) |
4d553a13 KL |
5673 | if (FRAME_TERMCAP_P (XFRAME (frame)) && FRAME_TTY (XFRAME (frame)) == tty) |
5674 | /* Record the new sizes, but don't reallocate the data | |
5675 | structures now. Let that be done later outside of the | |
5676 | signal handler. */ | |
5677 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); | |
9628b887 | 5678 | } |
4588ec20 | 5679 | } |
3fc809e2 | 5680 | |
4588ec20 JB |
5681 | errno = old_errno; |
5682 | } | |
5683 | #endif /* SIGWINCH */ | |
5684 | ||
5685 | ||
b96fd3e8 GM |
5686 | /* Do any change in frame size that was requested by a signal. SAFE |
5687 | non-zero means this function is called from a place where it is | |
5688 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 5689 | |
dfcf069d | 5690 | void |
971de7fb | 5691 | do_pending_window_change (int safe) |
4588ec20 JB |
5692 | { |
5693 | /* If window_change_signal should have run before, run it now. */ | |
b96fd3e8 GM |
5694 | if (redisplaying_p && !safe) |
5695 | return; | |
177c0ea7 | 5696 | |
4588ec20 JB |
5697 | while (delayed_size_change) |
5698 | { | |
35f56f96 | 5699 | Lisp_Object tail, frame; |
4588ec20 JB |
5700 | |
5701 | delayed_size_change = 0; | |
5702 | ||
35f56f96 | 5703 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5704 | { |
5f5c8ee5 | 5705 | struct frame *f = XFRAME (frame); |
35f56f96 | 5706 | |
7df02016 KS |
5707 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
5708 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
5709 | 0, 0, safe); | |
4588ec20 JB |
5710 | } |
5711 | } | |
5712 | } | |
5713 | ||
5714 | ||
502b9b64 | 5715 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 5716 | indicate no change is to take place. |
4588ec20 | 5717 | |
b6a65ac2 JB |
5718 | If DELAY is non-zero, then assume we're being called from a signal |
5719 | handler, and queue the change for later - perhaps the next | |
5720 | redisplay. Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
5721 | from a signal handler. |
5722 | ||
5723 | SAFE non-zero means this function is called from a place where it's | |
5724 | safe to change frame sizes while a redisplay is in progress. */ | |
b6a65ac2 | 5725 | |
dfcf069d | 5726 | void |
971de7fb | 5727 | change_frame_size (register struct frame *f, int newheight, int newwidth, int pretend, int delay, int safe) |
45140e01 RS |
5728 | { |
5729 | Lisp_Object tail, frame; | |
3826ea1a | 5730 | |
9628b887 | 5731 | if (FRAME_MSDOS_P (f)) |
45140e01 | 5732 | { |
9628b887 KL |
5733 | /* On MS-DOS, all frames use the same screen, so a change in |
5734 | size affects all frames. Termcap now supports multiple | |
5735 | ttys. */ | |
45140e01 | 5736 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 5737 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 5738 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 5739 | pretend, delay, safe); |
45140e01 RS |
5740 | } |
5741 | else | |
b96fd3e8 | 5742 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
5743 | } |
5744 | ||
5745 | static void | |
971de7fb | 5746 | change_frame_size_1 (register struct frame *f, int newheight, int newwidth, int pretend, int delay, int safe) |
4588ec20 | 5747 | { |
7df02016 | 5748 | int new_frame_total_cols; |
d311d28c | 5749 | ptrdiff_t count = SPECPDL_INDEX (); |
3826ea1a | 5750 | |
4588ec20 | 5751 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 5752 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 5753 | { |
7df02016 KS |
5754 | f->new_text_lines = newheight; |
5755 | f->new_text_cols = newwidth; | |
4588ec20 JB |
5756 | delayed_size_change = 1; |
5757 | return; | |
5758 | } | |
5759 | ||
502b9b64 | 5760 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
5761 | f->new_text_lines = 0; |
5762 | f->new_text_cols = 0; | |
b6a65ac2 | 5763 | |
08f7aa3e | 5764 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 5765 | if (newheight == 0) |
7df02016 | 5766 | newheight = FRAME_LINES (f); |
ae19c6f2 | 5767 | if (newwidth == 0) |
7df02016 | 5768 | newwidth = FRAME_COLS (f); |
3826ea1a | 5769 | |
3b95a6f9 | 5770 | /* Compute width of windows in F. */ |
b6a65ac2 | 5771 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 5772 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 | 5773 | |
3b95a6f9 MR |
5774 | /* This is the width of the frame with vertical scroll bars and fringe |
5775 | columns. Do this after rounding - see discussion of bug#9723. */ | |
5776 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); | |
5777 | ||
b6a65ac2 | 5778 | /* If we're not changing the frame size, quit now. */ |
3b95a6f9 MR |
5779 | /* Frame width may be unchanged but the text portion may change, for |
5780 | example, fullscreen and remove/add scroll bar. */ | |
7df02016 | 5781 | if (newheight == FRAME_LINES (f) |
3b95a6f9 MR |
5782 | /* Text portion unchanged? */ |
5783 | && newwidth == FRAME_COLS (f) | |
5784 | /* Frame width unchanged? */ | |
5785 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) | |
4588ec20 JB |
5786 | return; |
5787 | ||
cbb95688 RS |
5788 | BLOCK_INPUT; |
5789 | ||
886a8a6c KH |
5790 | #ifdef MSDOS |
5791 | /* We only can set screen dimensions to certain values supported | |
5792 | by our video hardware. Try to find the smallest size greater | |
5793 | or equal to the requested dimensions. */ | |
5794 | dos_set_window_size (&newheight, &newwidth); | |
5795 | #endif | |
5796 | ||
7df02016 | 5797 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 5798 | { |
562dd5e9 | 5799 | resize_frame_windows (f, newheight, 0); |
b6a65ac2 | 5800 | |
48e482e6 EZ |
5801 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5802 | manipulating video hardware. */ | |
5803 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5804 | FrameRows (FRAME_TTY (f)) = newheight; |
4588ec20 JB |
5805 | } |
5806 | ||
7df02016 | 5807 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 5808 | { |
562dd5e9 | 5809 | resize_frame_windows (f, new_frame_total_cols, 1); |
4588ec20 | 5810 | |
48e482e6 EZ |
5811 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5812 | manipulating video hardware. */ | |
5813 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5814 | FrameCols (FRAME_TTY (f)) = newwidth; |
5f5c8ee5 | 5815 | |
9ea173e8 | 5816 | if (WINDOWP (f->tool_bar_window)) |
7df02016 | 5817 | XSETFASTINT (XWINDOW (f->tool_bar_window)->total_cols, newwidth); |
4588ec20 JB |
5818 | } |
5819 | ||
7df02016 KS |
5820 | FRAME_LINES (f) = newheight; |
5821 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 5822 | |
5f5c8ee5 GM |
5823 | { |
5824 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
5825 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 5826 | |
5f5c8ee5 GM |
5827 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
5828 | &text_area_height); | |
5829 | if (w->cursor.x >= text_area_x + text_area_width) | |
5830 | w->cursor.hpos = w->cursor.x = 0; | |
5831 | if (w->cursor.y >= text_area_y + text_area_height) | |
5832 | w->cursor.vpos = w->cursor.y = 0; | |
5833 | } | |
986e61b8 | 5834 | |
5f5c8ee5 | 5835 | adjust_glyphs (f); |
5f5c8ee5 | 5836 | calculate_costs (f); |
cb02fa39 GM |
5837 | SET_FRAME_GARBAGED (f); |
5838 | f->resized_p = 1; | |
97cf50e7 RS |
5839 | |
5840 | UNBLOCK_INPUT; | |
61730a69 | 5841 | |
e523f7e5 RS |
5842 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); |
5843 | ||
ef264c42 | 5844 | run_window_configuration_change_hook (f); |
e523f7e5 RS |
5845 | |
5846 | unbind_to (count, Qnil); | |
4588ec20 | 5847 | } |
5f5c8ee5 GM |
5848 | |
5849 | ||
4588ec20 | 5850 | \f |
5f5c8ee5 GM |
5851 | /*********************************************************************** |
5852 | Terminal Related Lisp Functions | |
5853 | ***********************************************************************/ | |
5854 | ||
5855 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 5856 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
5857 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
5858 | FILE = nil means just close any termscript file currently open. */) | |
5842a27b | 5859 | (Lisp_Object file) |
5f5c8ee5 | 5860 | { |
0b0d3e0b KL |
5861 | struct tty_display_info *tty; |
5862 | ||
7d2f1216 EZ |
5863 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ()) |
5864 | && ! FRAME_MSDOS_P (SELECTED_FRAME ())) | |
0b0d3e0b KL |
5865 | error ("Current frame is not on a tty device"); |
5866 | ||
5867 | tty = CURTTY (); | |
5868 | ||
5869 | if (tty->termscript != 0) | |
e18c7093 KL |
5870 | { |
5871 | BLOCK_INPUT; | |
0b0d3e0b | 5872 | fclose (tty->termscript); |
e18c7093 KL |
5873 | UNBLOCK_INPUT; |
5874 | } | |
0b0d3e0b | 5875 | tty->termscript = 0; |
5f5c8ee5 GM |
5876 | |
5877 | if (! NILP (file)) | |
5878 | { | |
5879 | file = Fexpand_file_name (file, Qnil); | |
42a5b22f | 5880 | tty->termscript = fopen (SSDATA (file), "w"); |
0b0d3e0b | 5881 | if (tty->termscript == 0) |
5f5c8ee5 GM |
5882 | report_file_error ("Opening termscript", Fcons (file, Qnil)); |
5883 | } | |
5884 | return Qnil; | |
5885 | } | |
5886 | ||
5887 | ||
4588ec20 | 5888 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
62af879c | 5889 | Ssend_string_to_terminal, 1, 2, 0, |
7ee72033 | 5890 | doc: /* Send STRING to the terminal without alteration. |
62af879c KL |
5891 | Control characters in STRING will have terminal-dependent effects. |
5892 | ||
6ed8eeff | 5893 | Optional parameter TERMINAL specifies the tty terminal device to use. |
558759e4 AM |
5894 | It may be a terminal object, a frame, or nil for the terminal used by |
5895 | the currently selected frame. In batch mode, STRING is sent to stdout | |
5896 | when TERMINAL is nil. */) | |
5842a27b | 5897 | (Lisp_Object string, Lisp_Object terminal) |
4588ec20 | 5898 | { |
7cef7ce3 SM |
5899 | struct terminal *t = get_terminal (terminal, 1); |
5900 | FILE *out; | |
0b0d3e0b | 5901 | |
94f3db62 | 5902 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 5903 | CHECK_STRING (string); |
2c1e4409 | 5904 | BLOCK_INPUT; |
0b0d3e0b | 5905 | |
6ed8eeff KL |
5906 | if (!t) |
5907 | error ("Unknown terminal device"); | |
0b0d3e0b | 5908 | |
7cef7ce3 SM |
5909 | if (t->type == output_initial) |
5910 | out = stdout; | |
5911 | else if (t->type != output_termcap && t->type != output_msdos_raw) | |
5912 | error ("Device %d is not a termcap terminal device", t->id); | |
5913 | else | |
5914 | { | |
5915 | struct tty_display_info *tty = t->display_info.tty; | |
3fc809e2 | 5916 | |
7cef7ce3 SM |
5917 | if (! tty->output) |
5918 | error ("Terminal is currently suspended"); | |
cecfdea6 | 5919 | |
7cef7ce3 SM |
5920 | if (tty->termscript) |
5921 | { | |
5922 | fwrite (SDATA (string), 1, SBYTES (string), tty->termscript); | |
5923 | fflush (tty->termscript); | |
5924 | } | |
5925 | out = tty->output; | |
4588ec20 | 5926 | } |
7cef7ce3 SM |
5927 | fwrite (SDATA (string), 1, SBYTES (string), out); |
5928 | fflush (out); | |
2c1e4409 | 5929 | UNBLOCK_INPUT; |
4588ec20 JB |
5930 | return Qnil; |
5931 | } | |
5932 | ||
5f5c8ee5 | 5933 | |
a7ca3326 | 5934 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 5935 | doc: /* Beep, or flash the screen. |
228299fa | 5936 | Also, unless an argument is given, |
7ee72033 | 5937 | terminate any keyboard macro currently executing. */) |
5842a27b | 5938 | (Lisp_Object arg) |
4588ec20 | 5939 | { |
efb859b4 | 5940 | if (!NILP (arg)) |
4588ec20 | 5941 | { |
7fa788da RS |
5942 | if (noninteractive) |
5943 | putchar (07); | |
5944 | else | |
385ed61f | 5945 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5946 | } |
5947 | else | |
5948 | bitch_at_user (); | |
5949 | ||
5950 | return Qnil; | |
5951 | } | |
5952 | ||
dfcf069d | 5953 | void |
971de7fb | 5954 | bitch_at_user (void) |
4588ec20 JB |
5955 | { |
5956 | if (noninteractive) | |
5957 | putchar (07); | |
5f5c8ee5 | 5958 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
4588ec20 JB |
5959 | error ("Keyboard macro terminated by a command ringing the bell"); |
5960 | else | |
385ed61f | 5961 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5962 | } |
5963 | ||
5f5c8ee5 GM |
5964 | |
5965 | \f | |
5966 | /*********************************************************************** | |
5967 | Sleeping, Waiting | |
5968 | ***********************************************************************/ | |
5969 | ||
d311d28c PE |
5970 | /* Convert a positive value DURATION to a seconds count *PSEC plus a |
5971 | microseconds count *PUSEC, rounding up. On overflow return the | |
5972 | maximal value. */ | |
5973 | void | |
5974 | duration_to_sec_usec (double duration, int *psec, int *pusec) | |
5975 | { | |
5976 | int MILLION = 1000000; | |
5977 | int sec = INT_MAX, usec = MILLION - 1; | |
5978 | ||
5979 | if (duration < INT_MAX + 1.0) | |
5980 | { | |
5981 | int s = duration; | |
5982 | double usdouble = (duration - s) * MILLION; | |
5983 | int usfloor = usdouble; | |
5984 | int usceil = usfloor + (usfloor < usdouble); | |
5985 | ||
5986 | if (usceil < MILLION) | |
5987 | { | |
5988 | sec = s; | |
5989 | usec = usceil; | |
5990 | } | |
5991 | else if (sec < INT_MAX) | |
5992 | { | |
5993 | sec = s + 1; | |
5994 | usec = 0; | |
5995 | } | |
5996 | } | |
5997 | ||
5998 | *psec = sec; | |
5999 | *pusec = usec; | |
6000 | } | |
6001 | ||
a7ca3326 | 6002 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 6003 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
6004 | SECONDS may be a floating-point value, meaning that you can wait for a |
6005 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
6006 | additional wait period, in milliseconds; this may be useful if your | |
6007 | Emacs was built without floating point support. | |
7ee72033 | 6008 | \(Not all operating systems support waiting for a fraction of a second.) */) |
5842a27b | 6009 | (Lisp_Object seconds, Lisp_Object milliseconds) |
4588ec20 | 6010 | { |
767229f8 | 6011 | int sec, usec; |
d311d28c | 6012 | double duration = extract_float (seconds); |
4588ec20 | 6013 | |
d311d28c PE |
6014 | if (!NILP (milliseconds)) |
6015 | { | |
6016 | CHECK_NUMBER (milliseconds); | |
6017 | duration += XINT (milliseconds) / 1000.0; | |
6018 | } | |
b07646f5 | 6019 | |
d311d28c PE |
6020 | if (! (0 < duration)) |
6021 | return Qnil; | |
6022 | ||
6023 | duration_to_sec_usec (duration, &sec, &usec); | |
4588ec20 | 6024 | |
a41f8bed | 6025 | #ifndef EMACS_HAS_USECS |
767229f8 | 6026 | if (sec == 0 && usec != 0) |
861e19b9 | 6027 | error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); |
4588ec20 | 6028 | #endif |
767229f8 | 6029 | |
dcd1ca45 | 6030 | wait_reading_process_output (sec, usec, 0, 0, Qnil, NULL, 0); |
4588ec20 JB |
6031 | |
6032 | return Qnil; | |
6033 | } | |
6034 | ||
5f5c8ee5 | 6035 | |
dcd1ca45 | 6036 | /* This is just like wait_reading_process_output, except that |
902b9b6d | 6037 | it does redisplay. |
f76475ad | 6038 | |
2bcac766 CY |
6039 | TIMEOUT is number of seconds to wait (float or integer), |
6040 | or t to wait forever. | |
902b9b6d KS |
6041 | READING is 1 if reading input. |
6042 | If DO_DISPLAY is >0 display process output while waiting. | |
6043 | If DO_DISPLAY is >1 perform an initial redisplay before waiting. | |
6044 | */ | |
4588ec20 | 6045 | |
f76475ad | 6046 | Lisp_Object |
971de7fb | 6047 | sit_for (Lisp_Object timeout, int reading, int do_display) |
f76475ad | 6048 | { |
902b9b6d | 6049 | int sec, usec; |
f222369e | 6050 | |
902b9b6d | 6051 | swallow_events (do_display); |
ccddf474 | 6052 | |
902b9b6d | 6053 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 6054 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 6055 | return Qnil; |
4588ec20 | 6056 | |
902b9b6d KS |
6057 | if (do_display >= 2) |
6058 | redisplay_preserve_echo_area (2); | |
6059 | ||
d311d28c | 6060 | if (EQ (timeout, Qt)) |
2bcac766 CY |
6061 | { |
6062 | sec = 0; | |
6063 | usec = 0; | |
6064 | } | |
902b9b6d | 6065 | else |
d311d28c PE |
6066 | { |
6067 | double duration = extract_float (timeout); | |
4588ec20 | 6068 | |
d311d28c PE |
6069 | if (! (0 < duration)) |
6070 | return Qt; | |
6071 | ||
6072 | duration_to_sec_usec (duration, &sec, &usec); | |
6073 | } | |
dfdb645c | 6074 | |
4588ec20 | 6075 | #ifdef SIGIO |
8fc798e9 | 6076 | gobble_input (0); |
f76475ad JB |
6077 | #endif |
6078 | ||
902b9b6d | 6079 | wait_reading_process_output (sec, usec, reading ? -1 : 1, do_display, |
dcd1ca45 | 6080 | Qnil, NULL, 0); |
f76475ad | 6081 | |
4588ec20 JB |
6082 | return detect_input_pending () ? Qnil : Qt; |
6083 | } | |
6084 | ||
5f5c8ee5 | 6085 | |
a7ca3326 | 6086 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
025de85b CY |
6087 | doc: /* Perform redisplay. |
6088 | Optional arg FORCE, if non-nil, prevents redisplay from being | |
6089 | preempted by arriving input, even if `redisplay-dont-pause' is nil. | |
6090 | If `redisplay-dont-pause' is non-nil (the default), redisplay is never | |
6091 | preempted by arriving input, so FORCE does nothing. | |
6092 | ||
6093 | Return t if redisplay was performed, nil if redisplay was preempted | |
6094 | immediately by pending input. */) | |
5842a27b | 6095 | (Lisp_Object force) |
f76475ad | 6096 | { |
d311d28c | 6097 | ptrdiff_t count; |
659d9874 | 6098 | |
902b9b6d KS |
6099 | swallow_events (1); |
6100 | if ((detect_input_pending_run_timers (1) | |
01327edf | 6101 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
6102 | || !NILP (Vexecuting_kbd_macro)) |
6103 | return Qnil; | |
f76475ad | 6104 | |
01327edf KS |
6105 | count = SPECPDL_INDEX (); |
6106 | if (!NILP (force) && !redisplay_dont_pause) | |
6107 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 6108 | redisplay_preserve_echo_area (2); |
01327edf | 6109 | unbind_to (count, Qnil); |
7ba07a1a | 6110 | return Qt; |
f76475ad | 6111 | } |
5f5c8ee5 GM |
6112 | |
6113 | ||
6114 | \f | |
6115 | /*********************************************************************** | |
6116 | Other Lisp Functions | |
6117 | ***********************************************************************/ | |
6118 | ||
6119 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
6120 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 6121 | buffer-modified-flags. */ |
5f5c8ee5 GM |
6122 | |
6123 | static Lisp_Object frame_and_buffer_state; | |
6124 | ||
6125 | ||
6126 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 6127 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 6128 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
6129 | VARIABLE is a variable name whose value is either nil or a state vector |
6130 | that will be updated to contain all frames and buffers, | |
228299fa | 6131 | aside from buffers whose names start with space, |
44edd521 RS |
6132 | along with the buffers' read-only and modified flags. This allows a fast |
6133 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 6134 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
6135 | the current state. |
6136 | ||
6137 | If VARIABLE is nil, an internal variable is used. Users should not | |
6138 | pass nil for VARIABLE. */) | |
5842a27b | 6139 | (Lisp_Object variable) |
5f5c8ee5 | 6140 | { |
44edd521 RS |
6141 | Lisp_Object state, tail, frame, buf; |
6142 | Lisp_Object *vecp, *end; | |
54e1617f | 6143 | ptrdiff_t n; |
5f5c8ee5 | 6144 | |
44edd521 RS |
6145 | if (! NILP (variable)) |
6146 | { | |
6147 | CHECK_SYMBOL (variable); | |
6148 | state = Fsymbol_value (variable); | |
6149 | if (! VECTORP (state)) | |
6150 | goto changed; | |
6151 | } | |
6152 | else | |
6153 | state = frame_and_buffer_state; | |
6154 | ||
6155 | vecp = XVECTOR (state)->contents; | |
77b37c05 | 6156 | end = vecp + ASIZE (state); |
44edd521 | 6157 | |
5f5c8ee5 GM |
6158 | FOR_EACH_FRAME (tail, frame) |
6159 | { | |
44edd521 RS |
6160 | if (vecp == end) |
6161 | goto changed; | |
5f5c8ee5 GM |
6162 | if (!EQ (*vecp++, frame)) |
6163 | goto changed; | |
44edd521 RS |
6164 | if (vecp == end) |
6165 | goto changed; | |
5f5c8ee5 GM |
6166 | if (!EQ (*vecp++, XFRAME (frame)->name)) |
6167 | goto changed; | |
6168 | } | |
44edd521 | 6169 | /* Check that the buffer info matches. */ |
7539e11f | 6170 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6171 | { |
7539e11f | 6172 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6173 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 6174 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 6175 | continue; |
44edd521 RS |
6176 | if (vecp == end) |
6177 | goto changed; | |
5f5c8ee5 GM |
6178 | if (!EQ (*vecp++, buf)) |
6179 | goto changed; | |
44edd521 RS |
6180 | if (vecp == end) |
6181 | goto changed; | |
4b4deea2 | 6182 | if (!EQ (*vecp++, BVAR (XBUFFER (buf), read_only))) |
5f5c8ee5 | 6183 | goto changed; |
44edd521 RS |
6184 | if (vecp == end) |
6185 | goto changed; | |
5f5c8ee5 GM |
6186 | if (!EQ (*vecp++, Fbuffer_modified_p (buf))) |
6187 | goto changed; | |
6188 | } | |
44edd521 RS |
6189 | if (vecp == end) |
6190 | goto changed; | |
5f5c8ee5 GM |
6191 | /* Detect deletion of a buffer at the end of the list. */ |
6192 | if (EQ (*vecp, Qlambda)) | |
6193 | return Qnil; | |
44edd521 RS |
6194 | |
6195 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 6196 | changed: |
44edd521 RS |
6197 | /* Count the size we will need. |
6198 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
6199 | n = 1; |
6200 | FOR_EACH_FRAME (tail, frame) | |
6201 | n += 2; | |
7539e11f | 6202 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6203 | n += 3; |
44edd521 RS |
6204 | /* Reallocate the vector if data has grown to need it, |
6205 | or if it has shrunk a lot. */ | |
6206 | if (! VECTORP (state) | |
77b37c05 PE |
6207 | || n > ASIZE (state) |
6208 | || n + 20 < ASIZE (state) / 2) | |
5f5c8ee5 | 6209 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
6210 | { |
6211 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
6212 | if (! NILP (variable)) | |
6213 | Fset (variable, state); | |
6214 | else | |
6215 | frame_and_buffer_state = state; | |
6216 | } | |
6217 | ||
6218 | /* Record the new data in the (possibly reallocated) vector. */ | |
6219 | vecp = XVECTOR (state)->contents; | |
5f5c8ee5 GM |
6220 | FOR_EACH_FRAME (tail, frame) |
6221 | { | |
6222 | *vecp++ = frame; | |
6223 | *vecp++ = XFRAME (frame)->name; | |
6224 | } | |
7539e11f | 6225 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6226 | { |
7539e11f | 6227 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6228 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 6229 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 GM |
6230 | continue; |
6231 | *vecp++ = buf; | |
4b4deea2 | 6232 | *vecp++ = BVAR (XBUFFER (buf), read_only); |
5f5c8ee5 GM |
6233 | *vecp++ = Fbuffer_modified_p (buf); |
6234 | } | |
6235 | /* Fill up the vector with lambdas (always at least one). */ | |
6236 | *vecp++ = Qlambda; | |
44edd521 | 6237 | while (vecp - XVECTOR (state)->contents |
77b37c05 | 6238 | < ASIZE (state)) |
5f5c8ee5 GM |
6239 | *vecp++ = Qlambda; |
6240 | /* Make sure we didn't overflow the vector. */ | |
44edd521 | 6241 | if (vecp - XVECTOR (state)->contents |
77b37c05 | 6242 | > ASIZE (state)) |
5f5c8ee5 GM |
6243 | abort (); |
6244 | return Qt; | |
6245 | } | |
6246 | ||
6247 | ||
4588ec20 | 6248 | \f |
5f5c8ee5 GM |
6249 | /*********************************************************************** |
6250 | Initialization | |
6251 | ***********************************************************************/ | |
6252 | ||
5f5c8ee5 GM |
6253 | /* Initialization done when Emacs fork is started, before doing stty. |
6254 | Determine terminal type and set terminal_driver. Then invoke its | |
6255 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 6256 | |
dfcf069d | 6257 | void |
971de7fb | 6258 | init_display (void) |
4588ec20 | 6259 | { |
28d440ab KL |
6260 | char *terminal_type; |
6261 | ||
5f5c8ee5 GM |
6262 | /* Construct the space glyph. */ |
6263 | space_glyph.type = CHAR_GLYPH; | |
3fc809e2 | 6264 | SET_CHAR_GLYPH (space_glyph, ' ', DEFAULT_FACE_ID, 0); |
5f5c8ee5 GM |
6265 | space_glyph.charpos = -1; |
6266 | ||
4588ec20 JB |
6267 | inverse_video = 0; |
6268 | cursor_in_echo_area = 0; | |
6269 | terminal_type = (char *) 0; | |
6270 | ||
1315c181 JB |
6271 | /* Now is the time to initialize this; it's used by init_sys_modes |
6272 | during startup. */ | |
2246281f | 6273 | Vinitial_window_system = Qnil; |
4588ec20 | 6274 | |
4181ad9c KL |
6275 | /* SIGWINCH needs to be handled no matter what display we start |
6276 | with. Otherwise newly opened tty frames will not resize | |
6277 | automatically. */ | |
6278 | #ifdef SIGWINCH | |
6279 | #ifndef CANNOT_DUMP | |
6280 | if (initialized) | |
6281 | #endif /* CANNOT_DUMP */ | |
6282 | signal (SIGWINCH, window_change_signal); | |
6283 | #endif /* SIGWINCH */ | |
4588ec20 | 6284 | |
d6ef42b9 | 6285 | /* If running as a daemon, no need to initialize any frames/terminal. */ |
ff808935 DN |
6286 | if (IS_DAEMON) |
6287 | return; | |
d6ef42b9 | 6288 | |
1315c181 JB |
6289 | /* If the user wants to use a window system, we shouldn't bother |
6290 | initializing the terminal. This is especially important when the | |
6291 | terminal is so dumb that emacs gives up before and doesn't bother | |
6292 | using the window system. | |
4588ec20 | 6293 | |
36bbad1d KH |
6294 | If the DISPLAY environment variable is set and nonempty, |
6295 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6296 | |
6297 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 6298 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 6299 | { |
36bbad1d | 6300 | char *display; |
36bbad1d | 6301 | display = getenv ("DISPLAY"); |
36bbad1d | 6302 | display_arg = (display != 0 && *display != 0); |
c1fc674b AS |
6303 | |
6304 | if (display_arg && !x_display_ok (display)) | |
6305 | { | |
6306 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
6307 | display); | |
6308 | inhibit_window_system = 1; | |
6309 | } | |
f040093a | 6310 | } |
d460af17 | 6311 | |
4fcc2638 | 6312 | if (!inhibit_window_system && display_arg) |
4588ec20 | 6313 | { |
111d9af3 | 6314 | Vinitial_window_system = Qx; |
4588ec20 JB |
6315 | #ifdef HAVE_X11 |
6316 | Vwindow_system_version = make_number (11); | |
039e5d71 | 6317 | #endif |
9311dcff | 6318 | #ifdef GNU_LINUX |
039e5d71 | 6319 | /* In some versions of ncurses, |
6a428f77 | 6320 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6321 | So call tgetent. */ |
6322 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 | 6323 | #endif |
5f5c8ee5 | 6324 | adjust_frame_glyphs_initially (); |
4588ec20 JB |
6325 | return; |
6326 | } | |
6327 | #endif /* HAVE_X_WINDOWS */ | |
6328 | ||
fd2e066a | 6329 | #ifdef HAVE_NTGUI |
177c0ea7 | 6330 | if (!inhibit_window_system) |
fd2e066a | 6331 | { |
111d9af3 | 6332 | Vinitial_window_system = Qw32; |
fd2e066a | 6333 | Vwindow_system_version = make_number (1); |
5f5c8ee5 | 6334 | adjust_frame_glyphs_initially (); |
fd2e066a GV |
6335 | return; |
6336 | } | |
6337 | #endif /* HAVE_NTGUI */ | |
6338 | ||
edfda783 AR |
6339 | #ifdef HAVE_NS |
6340 | if (!inhibit_window_system | |
6341 | #ifndef CANNOT_DUMP | |
6342 | && initialized | |
6343 | #endif | |
6344 | ) | |
6345 | { | |
111d9af3 | 6346 | Vinitial_window_system = Qns; |
5e617bc2 | 6347 | Vwindow_system_version = make_number (10); |
edfda783 AR |
6348 | adjust_frame_glyphs_initially (); |
6349 | return; | |
6350 | } | |
6351 | #endif | |
6352 | ||
4588ec20 JB |
6353 | /* If no window system has been specified, try to use the terminal. */ |
6354 | if (! isatty (0)) | |
6355 | { | |
1559a86d | 6356 | fatal ("standard input is not a tty"); |
4588ec20 JB |
6357 | exit (1); |
6358 | } | |
6359 | ||
6152361f JR |
6360 | #ifdef WINDOWSNT |
6361 | terminal_type = "w32console"; | |
6362 | #else | |
153a073c | 6363 | /* Look at the TERM variable. */ |
4588ec20 | 6364 | terminal_type = (char *) getenv ("TERM"); |
6152361f | 6365 | #endif |
4588ec20 JB |
6366 | if (!terminal_type) |
6367 | { | |
5d12ff0b | 6368 | #ifdef HAVE_WINDOW_SYSTEM |
b9e590fc RS |
6369 | if (! inhibit_window_system) |
6370 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6371 | else |
6372 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6373 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
4588ec20 JB |
6374 | exit (1); |
6375 | } | |
6376 | ||
0a125897 | 6377 | { |
6ed8eeff | 6378 | struct terminal *t; |
3224dac1 KL |
6379 | struct frame *f = XFRAME (selected_frame); |
6380 | ||
6381 | /* Open a display on the controlling tty. */ | |
6ed8eeff | 6382 | t = init_tty (0, terminal_type, 1); /* Errors are fatal. */ |
3224dac1 KL |
6383 | |
6384 | /* Convert the initial frame to use the new display. */ | |
b04f5ad2 | 6385 | if (f->output_method != output_initial) |
3224dac1 | 6386 | abort (); |
6ed8eeff KL |
6387 | f->output_method = t->type; |
6388 | f->terminal = t; | |
3224dac1 | 6389 | |
6ed8eeff | 6390 | t->reference_count++; |
7ac5dac9 EZ |
6391 | #ifdef MSDOS |
6392 | f->output_data.tty->display_info = &the_only_display_info; | |
6393 | #else | |
6394 | if (f->output_method == output_termcap) | |
6395 | create_tty_output (f); | |
6396 | #endif | |
6ed8eeff | 6397 | t->display_info.tty->top_frame = selected_frame; |
5b65d888 | 6398 | change_frame_size (XFRAME (selected_frame), |
6ed8eeff KL |
6399 | FrameRows (t->display_info.tty), |
6400 | FrameCols (t->display_info.tty), 0, 0, 1); | |
3224dac1 | 6401 | |
6ed8eeff KL |
6402 | /* Delete the initial terminal. */ |
6403 | if (--initial_terminal->reference_count == 0 | |
6404 | && initial_terminal->delete_terminal_hook) | |
6405 | (*initial_terminal->delete_terminal_hook) (initial_terminal); | |
2666355c KL |
6406 | |
6407 | /* Update frame parameters to reflect the new type. */ | |
6408 | Fmodify_frame_parameters | |
6409 | (selected_frame, Fcons (Fcons (Qtty_type, | |
6ed8eeff | 6410 | Ftty_type (selected_frame)), Qnil)); |
657ceaa0 EZ |
6411 | if (t->display_info.tty->name) |
6412 | Fmodify_frame_parameters (selected_frame, | |
6413 | Fcons (Fcons (Qtty, build_string (t->display_info.tty->name)), | |
6414 | Qnil)); | |
6415 | else | |
6416 | Fmodify_frame_parameters (selected_frame, Fcons (Fcons (Qtty, Qnil), | |
6417 | Qnil)); | |
0a125897 | 6418 | } |
3fc809e2 | 6419 | |
d86c299a | 6420 | { |
91fb7e1b | 6421 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6422 | int width = FRAME_TOTAL_COLS (sf); |
6423 | int height = FRAME_LINES (sf); | |
d86c299a | 6424 | |
5f5c8ee5 | 6425 | /* If these sizes are so big they cause overflow, just ignore the |
dfd153ae PE |
6426 | change. It's not clear what better we could do. The rest of |
6427 | the code assumes that (width + 2) * height * sizeof (struct glyph) | |
6428 | does not overflow and does not exceed PTRDIFF_MAX or SIZE_MAX. */ | |
e3c25c68 PE |
6429 | if (INT_ADD_RANGE_OVERFLOW (width, 2, INT_MIN, INT_MAX) |
6430 | || INT_MULTIPLY_RANGE_OVERFLOW (width + 2, height, INT_MIN, INT_MAX) | |
dfd153ae PE |
6431 | || (min (PTRDIFF_MAX, SIZE_MAX) / sizeof (struct glyph) |
6432 | < (width + 2) * height)) | |
1559a86d | 6433 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6434 | } |
6435 | ||
5f5c8ee5 | 6436 | adjust_frame_glyphs_initially (); |
91fb7e1b | 6437 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6438 | |
5f5c8ee5 GM |
6439 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ |
6440 | if (initialized | |
6441 | && !noninteractive | |
2246281f | 6442 | && NILP (Vinitial_window_system)) |
2d764c78 EZ |
6443 | { |
6444 | /* For the initial frame, we don't have any way of knowing what | |
6445 | are the foreground and background colors of the terminal. */ | |
5e617bc2 | 6446 | struct frame *sf = SELECTED_FRAME (); |
2d764c78 | 6447 | |
f9d2fdc4 EZ |
6448 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
6449 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
6450 | call0 (intern ("tty-set-up-initial-frame-faces")); |
6451 | } | |
5f5c8ee5 GM |
6452 | } |
6453 | ||
6454 | ||
6455 | \f | |
6456 | /*********************************************************************** | |
6457 | Blinking cursor | |
6458 | ***********************************************************************/ | |
6459 | ||
c3f13540 | 6460 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 6461 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 6462 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
6463 | WINDOW nil means use the selected window. SHOW non-nil means |
6464 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 | 6465 | don't show a cursor. */) |
5842a27b | 6466 | (Lisp_Object window, Lisp_Object show) |
5f5c8ee5 | 6467 | { |
5f5c8ee5 GM |
6468 | /* Don't change cursor state while redisplaying. This could confuse |
6469 | output routines. */ | |
6470 | if (!redisplaying_p) | |
6471 | { | |
6472 | if (NILP (window)) | |
6473 | window = selected_window; | |
6474 | else | |
b7826503 | 6475 | CHECK_WINDOW (window); |
177c0ea7 | 6476 | |
5d7791b3 | 6477 | XWINDOW (window)->cursor_off_p = NILP (show); |
5f5c8ee5 GM |
6478 | } |
6479 | ||
6480 | return Qnil; | |
4588ec20 | 6481 | } |
5f5c8ee5 GM |
6482 | |
6483 | ||
5d7791b3 GM |
6484 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
6485 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 6486 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 | 6487 | WINDOW nil or omitted means report on the selected window. */) |
5842a27b | 6488 | (Lisp_Object window) |
5d7791b3 GM |
6489 | { |
6490 | struct window *w; | |
177c0ea7 | 6491 | |
5d7791b3 GM |
6492 | if (NILP (window)) |
6493 | window = selected_window; | |
6494 | else | |
b7826503 | 6495 | CHECK_WINDOW (window); |
177c0ea7 | 6496 | |
5d7791b3 | 6497 | w = XWINDOW (window); |
177c0ea7 | 6498 | return w->cursor_off_p ? Qnil : Qt; |
5d7791b3 GM |
6499 | } |
6500 | ||
87478b52 SM |
6501 | DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame, |
6502 | Slast_nonminibuf_frame, 0, 0, 0, | |
6503 | doc: /* Value is last nonminibuffer frame. */) | |
5842a27b | 6504 | (void) |
87478b52 | 6505 | { |
4958ed94 | 6506 | Lisp_Object frame = Qnil; |
87478b52 | 6507 | |
4958ed94 SM |
6508 | if (last_nonminibuf_frame) |
6509 | XSETFRAME (frame, last_nonminibuf_frame); | |
87478b52 SM |
6510 | |
6511 | return frame; | |
6512 | } | |
4588ec20 | 6513 | \f |
5f5c8ee5 GM |
6514 | /*********************************************************************** |
6515 | Initialization | |
6516 | ***********************************************************************/ | |
6517 | ||
dfcf069d | 6518 | void |
971de7fb | 6519 | syms_of_display (void) |
4588ec20 | 6520 | { |
502b9b64 | 6521 | defsubr (&Sredraw_frame); |
4588ec20 | 6522 | defsubr (&Sredraw_display); |
078b3696 | 6523 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
6524 | defsubr (&Sopen_termscript); |
6525 | defsubr (&Sding); | |
7ba07a1a | 6526 | defsubr (&Sredisplay); |
4588ec20 JB |
6527 | defsubr (&Ssleep_for); |
6528 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 6529 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 6530 | defsubr (&Sinternal_show_cursor_p); |
87478b52 | 6531 | defsubr (&Slast_nonminibuf_frame); |
4588ec20 | 6532 | |
2d5912c1 | 6533 | #if GLYPH_DEBUG |
9b0e97aa GM |
6534 | defsubr (&Sdump_redisplay_history); |
6535 | #endif | |
6536 | ||
d1dad759 | 6537 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
6538 | staticpro (&frame_and_buffer_state); |
6539 | ||
cd3520a4 JB |
6540 | DEFSYM (Qdisplay_table, "display-table"); |
6541 | DEFSYM (Qredisplay_dont_pause, "redisplay-dont-pause"); | |
9cda4f7c | 6542 | |
29208e82 | 6543 | DEFVAR_INT ("baud-rate", baud_rate, |
025de85b | 6544 | doc: /* The output baud rate of the terminal. |
228299fa GM |
6545 | On most systems, changing this value will affect the amount of padding |
6546 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 6547 | |
29208e82 | 6548 | DEFVAR_BOOL ("inverse-video", inverse_video, |
025de85b | 6549 | doc: /* Non-nil means invert the entire frame display. |
228299fa | 6550 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 6551 | |
29208e82 | 6552 | DEFVAR_BOOL ("visible-bell", visible_bell, |
025de85b | 6553 | doc: /* Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
6554 | |
6555 | See also `ring-bell-function'. */); | |
177c0ea7 | 6556 | |
29208e82 | 6557 | DEFVAR_BOOL ("no-redraw-on-reenter", no_redraw_on_reenter, |
025de85b | 6558 | doc: /* Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
6559 | A non-nil value is useful if the terminal can automatically preserve |
6560 | Emacs's frame display when you reenter Emacs. | |
6561 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 6562 | |
29208e82 | 6563 | DEFVAR_LISP ("initial-window-system", Vinitial_window_system, |
2246281f | 6564 | doc: /* Name of the window system that Emacs uses for the first frame. |
89baa1df EZ |
6565 | The value is a symbol: |
6566 | nil for a termcap frame (a character-only terminal), | |
6567 | 'x' for an Emacs frame that is really an X window, | |
6568 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6569 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6570 | 'pc' for a direct-write MS-DOS frame. | |
6571 | ||
6572 | Use of this variable as a boolean is deprecated. Instead, | |
6573 | use `display-graphic-p' or any of the other `display-*-p' | |
6574 | predicates which report frame's specific UI-related capabilities. */); | |
177c0ea7 | 6575 | |
70b8d0a4 SM |
6576 | DEFVAR_KBOARD ("window-system", Vwindow_system, |
6577 | doc: /* Name of window system through which the selected frame is displayed. | |
89baa1df EZ |
6578 | The value is a symbol: |
6579 | nil for a termcap frame (a character-only terminal), | |
6580 | 'x' for an Emacs frame that is really an X window, | |
6581 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6582 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6583 | 'pc' for a direct-write MS-DOS frame. | |
6584 | ||
6585 | Use of this variable as a boolean is deprecated. Instead, | |
6586 | use `display-graphic-p' or any of the other `display-*-p' | |
6587 | predicates which report frame's specific UI-related capabilities. */); | |
70b8d0a4 | 6588 | |
29208e82 | 6589 | DEFVAR_LISP ("window-system-version", Vwindow_system_version, |
bacf09b4 | 6590 | doc: /* The version number of the window system in use. |
c22140f6 | 6591 | For X windows, this is 11. */); |
177c0ea7 | 6592 | |
29208e82 | 6593 | DEFVAR_BOOL ("cursor-in-echo-area", cursor_in_echo_area, |
bacf09b4 | 6594 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 6595 | |
29208e82 | 6596 | DEFVAR_LISP ("glyph-table", Vglyph_table, |
bacf09b4 | 6597 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
6598 | If not nil, this is a vector indexed by glyph code to define the glyph. |
6599 | Each element can be: | |
6600 | integer: a glyph code which this glyph is an alias for. | |
6601 | string: output this glyph using that string (not impl. in X windows). | |
6602 | nil: this glyph mod 524288 is the code of a character to output, | |
6603 | and this glyph / 524288 is the face number (see `face-id') to use | |
6604 | while outputting it. */); | |
4588ec20 JB |
6605 | Vglyph_table = Qnil; |
6606 | ||
29208e82 | 6607 | DEFVAR_LISP ("standard-display-table", Vstandard_display_table, |
bacf09b4 | 6608 | doc: /* Display table to use for buffers that specify none. |
228299fa | 6609 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
6610 | Vstandard_display_table = Qnil; |
6611 | ||
29208e82 | 6612 | DEFVAR_BOOL ("redisplay-dont-pause", redisplay_dont_pause, |
025de85b | 6613 | doc: /* Non-nil means display update isn't paused when input is detected. */); |
6bf7006f | 6614 | redisplay_dont_pause = 1; |
5f5c8ee5 | 6615 | |
d012c62b | 6616 | #if PERIODIC_PREEMPTION_CHECKING |
29208e82 | 6617 | DEFVAR_LISP ("redisplay-preemption-period", Vredisplay_preemption_period, |
025de85b CY |
6618 | doc: /* Period in seconds between checking for input during redisplay. |
6619 | This has an effect only if `redisplay-dont-pause' is nil; in that | |
6620 | case, arriving input preempts redisplay until the input is processed. | |
6621 | If the value is nil, redisplay is never preempted. */); | |
d012c62b KS |
6622 | Vredisplay_preemption_period = make_float (0.10); |
6623 | #endif | |
6624 | ||
4588ec20 JB |
6625 | #ifdef CANNOT_DUMP |
6626 | if (noninteractive) | |
6627 | #endif | |
6628 | { | |
2246281f | 6629 | Vinitial_window_system = Qnil; |
4588ec20 JB |
6630 | Vwindow_system_version = Qnil; |
6631 | } | |
6632 | } |