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> |
f162bcc3 PE |
21 | |
22 | #define DISPEXTERN_INLINE EXTERN_INLINE | |
23 | ||
68c45bf0 | 24 | #include <signal.h> |
565620a5 | 25 | #include <stdio.h> |
d7306fe6 | 26 | #include <setjmp.h> |
dfcf069d | 27 | #include <unistd.h> |
dfcf069d | 28 | |
47099d6f | 29 | #include "lisp.h" |
4588ec20 JB |
30 | #include "termchar.h" |
31 | #include "termopts.h" | |
a0879520 | 32 | /* cm.h must come after dispextern.h on Windows. */ |
fd2e066a GV |
33 | #include "dispextern.h" |
34 | #include "cm.h" | |
83be827a | 35 | #include "character.h" |
e5560ff7 | 36 | #include "buffer.h" |
d43721a2 | 37 | #include "keyboard.h" |
502b9b64 | 38 | #include "frame.h" |
428a555e | 39 | #include "termhooks.h" |
4588ec20 JB |
40 | #include "window.h" |
41 | #include "commands.h" | |
42 | #include "disptab.h" | |
43 | #include "indent.h" | |
d169fe39 | 44 | #include "intervals.h" |
97cf50e7 | 45 | #include "blockinput.h" |
dfcf069d | 46 | #include "process.h" |
4588ec20 | 47 | |
58b2bb63 | 48 | #include "syssignal.h" |
a41f8bed | 49 | |
17a2cbbd DC |
50 | #ifdef HAVE_WINDOW_SYSTEM |
51 | #include TERM_HEADER | |
52 | #endif /* HAVE_WINDOW_SYSTEM */ | |
edfda783 | 53 | |
5f5c8ee5 | 54 | /* Include systime.h after xterm.h to avoid double inclusion of time.h. */ |
6cbd1643 | 55 | |
5f5c8ee5 | 56 | #include "systime.h" |
3883a901 RS |
57 | #include <errno.h> |
58 | ||
1c6f11f4 | 59 | #ifdef DISPNEW_NEEDS_STDIO_EXT |
68c45bf0 | 60 | #include <stdio_ext.h> |
4588ec20 | 61 | #endif |
c59592b3 | 62 | |
9311dcff | 63 | #if defined (HAVE_TERM_H) && defined (GNU_LINUX) |
fa0ec9f4 DL |
64 | #include <term.h> /* for tgetent */ |
65 | #endif | |
5f5c8ee5 GM |
66 | \f |
67 | /* Structure to pass dimensions around. Used for character bounding | |
68 | boxes, glyph matrix dimensions and alike. */ | |
69 | ||
70 | struct dim | |
71 | { | |
72 | int width; | |
73 | int height; | |
74 | }; | |
75 | ||
76 | \f | |
77 | /* Function prototypes. */ | |
78 | ||
f57e2426 | 79 | static void update_frame_line (struct frame *, int); |
2f7c71a1 AS |
80 | static int required_matrix_height (struct window *); |
81 | static int required_matrix_width (struct window *); | |
f57e2426 | 82 | static void adjust_frame_glyphs (struct frame *); |
59ea14cd | 83 | static void change_frame_size_1 (struct frame *, int, int, bool, bool, bool); |
d311d28c | 84 | static void increment_row_positions (struct glyph_row *, ptrdiff_t, ptrdiff_t); |
f57e2426 J |
85 | static void fill_up_frame_row_with_spaces (struct glyph_row *, int); |
86 | static void build_frame_matrix_from_window_tree (struct glyph_matrix *, | |
87 | struct window *); | |
88 | static void build_frame_matrix_from_leaf_window (struct glyph_matrix *, | |
89 | struct window *); | |
f57e2426 J |
90 | static void adjust_frame_message_buffer (struct frame *); |
91 | static void adjust_decode_mode_spec_buffer (struct frame *); | |
92 | static void fill_up_glyph_row_with_spaces (struct glyph_row *); | |
59ea14cd | 93 | static void clear_window_matrices (struct window *, bool); |
f57e2426 | 94 | static void fill_up_glyph_row_area_with_spaces (struct glyph_row *, int); |
59ea14cd PE |
95 | static int scrolling_window (struct window *, bool); |
96 | static bool update_window_line (struct window *, int, bool *); | |
f57e2426 | 97 | static void mirror_make_current (struct window *, int); |
e509cfa6 | 98 | #ifdef GLYPH_DEBUG |
f57e2426 J |
99 | static void check_matrix_pointers (struct glyph_matrix *, |
100 | struct glyph_matrix *); | |
b96fd3e8 | 101 | #endif |
f57e2426 | 102 | static void mirror_line_dance (struct window *, int, int, int *, char *); |
59ea14cd PE |
103 | static bool update_window_tree (struct window *, bool); |
104 | static bool update_window (struct window *, bool); | |
105 | static bool update_frame_1 (struct frame *, bool, bool); | |
106 | static bool scrolling (struct frame *); | |
f57e2426 | 107 | static void set_window_cursor_after_update (struct window *); |
f57e2426 J |
108 | static void adjust_frame_glyphs_for_window_redisplay (struct frame *); |
109 | static void adjust_frame_glyphs_for_frame_redisplay (struct frame *); | |
5f5c8ee5 | 110 | |
5f5c8ee5 | 111 | \f |
d012c62b KS |
112 | /* Redisplay preemption timers. */ |
113 | ||
114 | static EMACS_TIME preemption_period; | |
115 | static EMACS_TIME preemption_next_check; | |
116 | ||
59ea14cd | 117 | /* True upon entry to redisplay means do not assume anything about |
502b9b64 | 118 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 119 | |
59ea14cd | 120 | bool frame_garbaged; |
4588ec20 | 121 | |
59ea14cd | 122 | /* True means last display completed. False means it was preempted. */ |
4588ec20 | 123 | |
59ea14cd | 124 | bool display_completed; |
4588ec20 | 125 | |
e7067d00 | 126 | Lisp_Object Qdisplay_table, Qredisplay_dont_pause; |
5f5c8ee5 | 127 | |
4588ec20 | 128 | \f |
5f5c8ee5 | 129 | /* The currently selected frame. In a single-frame version, this |
91fb7e1b | 130 | variable always equals the_only_frame. */ |
4588ec20 | 131 | |
91fb7e1b | 132 | Lisp_Object selected_frame; |
4588ec20 | 133 | |
5f5c8ee5 | 134 | /* A frame which is not just a mini-buffer, or 0 if there are no such |
502b9b64 | 135 | frames. This is usually the most recent such frame that was |
87485d6f MW |
136 | selected. In a single-frame version, this variable always holds |
137 | the address of the_only_frame. */ | |
4588ec20 | 138 | |
5f5c8ee5 | 139 | struct frame *last_nonminibuf_frame; |
d52bad65 | 140 | |
59ea14cd | 141 | /* True means SIGWINCH happened when not safe. */ |
4588ec20 | 142 | |
59ea14cd | 143 | static bool delayed_size_change; |
4588ec20 | 144 | |
5f5c8ee5 | 145 | /* 1 means glyph initialization has been completed at startup. */ |
4588ec20 | 146 | |
59ea14cd | 147 | static bool glyphs_initialized_initially_p; |
4588ec20 | 148 | |
5f5c8ee5 | 149 | /* Updated window if != 0. Set by update_window. */ |
4588ec20 | 150 | |
5f5c8ee5 | 151 | struct window *updated_window; |
4588ec20 | 152 | |
5f5c8ee5 | 153 | /* Glyph row updated in update_window_line, and area that is updated. */ |
4588ec20 | 154 | |
5f5c8ee5 GM |
155 | struct glyph_row *updated_row; |
156 | int updated_area; | |
4588ec20 | 157 | |
5f5c8ee5 | 158 | /* A glyph for a space. */ |
4588ec20 | 159 | |
5f5c8ee5 | 160 | struct glyph space_glyph; |
4588ec20 | 161 | |
5f5c8ee5 GM |
162 | /* Counts of allocated structures. These counts serve to diagnose |
163 | memory leaks and double frees. */ | |
4588ec20 | 164 | |
5bf46f05 PE |
165 | static int glyph_matrix_count; |
166 | static int glyph_pool_count; | |
4588ec20 | 167 | |
5f5c8ee5 GM |
168 | /* If non-null, the frame whose frame matrices are manipulated. If |
169 | null, window matrices are worked on. */ | |
4588ec20 | 170 | |
5f5c8ee5 | 171 | static struct frame *frame_matrix_frame; |
4588ec20 | 172 | |
59ea14cd | 173 | /* True means that fonts have been loaded since the last glyph |
5f5c8ee5 | 174 | matrix adjustments. Redisplay must stop, and glyph matrices must |
59ea14cd | 175 | be adjusted when this flag becomes true during display. The |
5f5c8ee5 | 176 | reason fonts can be loaded so late is that fonts of fontsets are |
3aa9f0c4 KH |
177 | loaded on demand. Another reason is that a line contains many |
178 | characters displayed by zero width or very narrow glyphs of | |
179 | variable-width fonts. */ | |
836d2cde | 180 | |
59ea14cd | 181 | bool fonts_changed_p; |
836d2cde | 182 | |
177c0ea7 | 183 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 184 | This may only be used for terminal frames. */ |
836d2cde | 185 | |
e509cfa6 | 186 | #ifdef GLYPH_DEBUG |
4588ec20 | 187 | |
f57e2426 J |
188 | static int window_to_frame_vpos (struct window *, int); |
189 | static int window_to_frame_hpos (struct window *, int); | |
5f5c8ee5 GM |
190 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) |
191 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 192 | |
9b0e97aa GM |
193 | /* One element of the ring buffer containing redisplay history |
194 | information. */ | |
195 | ||
196 | struct redisplay_history | |
197 | { | |
198 | char trace[512 + 100]; | |
199 | }; | |
200 | ||
201 | /* The size of the history buffer. */ | |
202 | ||
203 | #define REDISPLAY_HISTORY_SIZE 30 | |
204 | ||
205 | /* The redisplay history buffer. */ | |
206 | ||
207 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
208 | ||
209 | /* Next free entry in redisplay_history. */ | |
210 | ||
211 | static int history_idx; | |
212 | ||
213 | /* A tick that's incremented each time something is added to the | |
214 | history. */ | |
215 | ||
dfd153ae | 216 | static uprintmax_t history_tick; |
6a8aec41 | 217 | \f |
9b0e97aa GM |
218 | /* Add to the redisplay history how window W has been displayed. |
219 | MSG is a trace containing the information how W's glyph matrix | |
59ea14cd | 220 | has been constructed. PAUSED_P means that the update |
9b0e97aa GM |
221 | has been interrupted for pending input. */ |
222 | ||
223 | static void | |
59ea14cd | 224 | add_window_display_history (struct window *w, const char *msg, bool paused_p) |
9b0e97aa GM |
225 | { |
226 | char *buf; | |
177c0ea7 | 227 | |
9b0e97aa GM |
228 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
229 | history_idx = 0; | |
230 | buf = redisplay_history[history_idx].trace; | |
231 | ++history_idx; | |
177c0ea7 | 232 | |
8666506e PE |
233 | snprintf (buf, sizeof redisplay_history[0].trace, |
234 | "%"pMu": window %p (`%s')%s\n%s", | |
235 | history_tick++, | |
236 | w, | |
d3d50620 DA |
237 | ((BUFFERP (w->buffer) |
238 | && STRINGP (BVAR (XBUFFER (w->buffer), name))) | |
239 | ? SSDATA (BVAR (XBUFFER (w->buffer), name)) | |
8666506e PE |
240 | : "???"), |
241 | paused_p ? " ***paused***" : "", | |
242 | msg); | |
9b0e97aa GM |
243 | } |
244 | ||
245 | ||
246 | /* Add to the redisplay history that frame F has been displayed. | |
59ea14cd | 247 | PAUSED_P means that the update has been interrupted for |
9b0e97aa GM |
248 | pending input. */ |
249 | ||
250 | static void | |
59ea14cd | 251 | add_frame_display_history (struct frame *f, bool paused_p) |
9b0e97aa GM |
252 | { |
253 | char *buf; | |
177c0ea7 | 254 | |
9b0e97aa GM |
255 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
256 | history_idx = 0; | |
257 | buf = redisplay_history[history_idx].trace; | |
258 | ++history_idx; | |
177c0ea7 | 259 | |
dfd153ae | 260 | sprintf (buf, "%"pMu": update frame %p%s", |
9b0e97aa GM |
261 | history_tick++, |
262 | f, paused_p ? " ***paused***" : ""); | |
263 | } | |
264 | ||
265 | ||
a7ca3326 | 266 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, |
9b0e97aa | 267 | Sdump_redisplay_history, 0, 0, "", |
7ee72033 | 268 | doc: /* Dump redisplay history to stderr. */) |
5842a27b | 269 | (void) |
9b0e97aa GM |
270 | { |
271 | int i; | |
272 | ||
273 | for (i = history_idx - 1; i != history_idx; --i) | |
274 | { | |
275 | if (i < 0) | |
276 | i = REDISPLAY_HISTORY_SIZE - 1; | |
277 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
278 | } | |
279 | ||
280 | return Qnil; | |
281 | } | |
282 | ||
283 | ||
e509cfa6 | 284 | #else /* not GLYPH_DEBUG */ |
4588ec20 | 285 | |
7df02016 KS |
286 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
287 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 288 | |
e509cfa6 | 289 | #endif /* GLYPH_DEBUG */ |
4588ec20 | 290 | |
4588ec20 | 291 | |
9e4bf381 PE |
292 | #if (defined PROFILING \ |
293 | && (defined __FreeBSD__ || defined GNU_LINUX || defined __MINGW32__) \ | |
294 | && !HAVE___EXECUTABLE_START) | |
295 | /* This function comes first in the Emacs executable and is used only | |
296 | to estimate the text start for profiling. */ | |
4588ec20 | 297 | void |
9e4bf381 | 298 | __executable_start (void) |
4588ec20 | 299 | { |
1088b922 | 300 | emacs_abort (); |
177c0ea7 | 301 | } |
72af86bd | 302 | #endif |
5f5c8ee5 GM |
303 | \f |
304 | /*********************************************************************** | |
305 | Glyph Matrices | |
306 | ***********************************************************************/ | |
307 | ||
308 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
309 | pool from which memory for the matrix should be allocated, or null | |
310 | for window-based redisplay where no glyph pools are used. The | |
311 | member `pool' of the glyph matrix structure returned is set to | |
312 | POOL, the structure is otherwise zeroed. */ | |
313 | ||
5bf46f05 | 314 | static struct glyph_matrix * |
971de7fb | 315 | new_glyph_matrix (struct glyph_pool *pool) |
4588ec20 | 316 | { |
23f86fce | 317 | struct glyph_matrix *result = xzalloc (sizeof *result); |
4588ec20 | 318 | |
5f5c8ee5 GM |
319 | /* Increment number of allocated matrices. This count is used |
320 | to detect memory leaks. */ | |
321 | ++glyph_matrix_count; | |
4588ec20 | 322 | |
5f5c8ee5 GM |
323 | /* Set pool and return. */ |
324 | result->pool = pool; | |
325 | return result; | |
4588ec20 JB |
326 | } |
327 | ||
4588ec20 | 328 | |
5f5c8ee5 GM |
329 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
330 | ||
331 | The global counter glyph_matrix_count is decremented when a matrix | |
332 | is freed. If the count gets negative, more structures were freed | |
333 | than allocated, i.e. one matrix was freed more than once or a bogus | |
334 | pointer was passed to this function. | |
177c0ea7 | 335 | |
5f5c8ee5 GM |
336 | If MATRIX->pool is null, this means that the matrix manages its own |
337 | glyph memory---this is done for matrices on X frames. Freeing the | |
338 | matrix also frees the glyph memory in this case. */ | |
339 | ||
340 | static void | |
971de7fb | 341 | free_glyph_matrix (struct glyph_matrix *matrix) |
4588ec20 | 342 | { |
5f5c8ee5 GM |
343 | if (matrix) |
344 | { | |
345 | int i; | |
346 | ||
347 | /* Detect the case that more matrices are freed than were | |
348 | allocated. */ | |
349 | if (--glyph_matrix_count < 0) | |
1088b922 | 350 | emacs_abort (); |
5f5c8ee5 GM |
351 | |
352 | /* Free glyph memory if MATRIX owns it. */ | |
353 | if (matrix->pool == NULL) | |
354 | for (i = 0; i < matrix->rows_allocated; ++i) | |
355 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 356 | |
5f5c8ee5 GM |
357 | /* Free row structures and the matrix itself. */ |
358 | xfree (matrix->rows); | |
359 | xfree (matrix); | |
360 | } | |
361 | } | |
4588ec20 | 362 | |
4588ec20 | 363 | |
5f5c8ee5 GM |
364 | /* Return the number of glyphs to reserve for a marginal area of |
365 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
366 | display line of window W. MARGIN gives the width of the marginal | |
367 | area in canonical character units. MARGIN should be an integer | |
368 | or a float. */ | |
369 | ||
370 | static int | |
971de7fb | 371 | margin_glyphs_to_reserve (struct window *w, int total_glyphs, Lisp_Object margin) |
5f5c8ee5 GM |
372 | { |
373 | int n; | |
4588ec20 | 374 | |
5f5c8ee5 | 375 | if (NUMBERP (margin)) |
4588ec20 | 376 | { |
d3d50620 | 377 | int width = XFASTINT (w->total_cols); |
5f5c8ee5 GM |
378 | double d = max (0, XFLOATINT (margin)); |
379 | d = min (width / 2 - 1, d); | |
35ec832e | 380 | n = (int) ((double) total_glyphs / width * d); |
5f5c8ee5 GM |
381 | } |
382 | else | |
383 | n = 0; | |
384 | ||
385 | return n; | |
386 | } | |
387 | ||
59ea14cd | 388 | /* Return true if ROW's hash value is correct. |
e509cfa6 DA |
389 | Optimized away if ENABLE_CHECKING is not defined. */ |
390 | ||
59ea14cd | 391 | static bool |
7a7270dd EZ |
392 | verify_row_hash (struct glyph_row *row) |
393 | { | |
015137db | 394 | return row->hash == row_hash (row); |
7a7270dd | 395 | } |
4588ec20 | 396 | |
5f5c8ee5 GM |
397 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
398 | window sizes. | |
4588ec20 | 399 | |
5f5c8ee5 GM |
400 | W is null if the function is called for a frame glyph matrix. |
401 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
402 | indices of the first column and row of MATRIX within the frame | |
403 | matrix, if such a matrix exists. They are zero for purely | |
404 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 405 | |
5f5c8ee5 GM |
406 | In window-based redisplay, where no frame matrices exist, glyph |
407 | matrices manage their own glyph storage. Otherwise, they allocate | |
408 | storage from a common frame glyph pool which can be found in | |
409 | MATRIX->pool. | |
23b0200c | 410 | |
5f5c8ee5 GM |
411 | The reason for this memory management strategy is to avoid complete |
412 | frame redraws if possible. When we allocate from a common pool, a | |
413 | change of the location or size of a sub-matrix within the pool | |
414 | requires a complete redisplay of the frame because we cannot easily | |
415 | make sure that the current matrices of all windows still agree with | |
416 | what is displayed on the screen. While this is usually fast, it | |
417 | leads to screen flickering. */ | |
23b0200c | 418 | |
5f5c8ee5 | 419 | static void |
971de7fb | 420 | adjust_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int x, int y, struct dim dim) |
5f5c8ee5 GM |
421 | { |
422 | int i; | |
423 | int new_rows; | |
59ea14cd PE |
424 | bool marginal_areas_changed_p = 0; |
425 | bool header_line_changed_p = 0; | |
426 | bool header_line_p = 0; | |
5f5c8ee5 | 427 | int left = -1, right = -1; |
ca8a12a7 | 428 | int window_width = -1, window_height = -1; |
5f5c8ee5 | 429 | |
6b61353c KH |
430 | /* See if W had a header line that has disappeared now, or vice versa. |
431 | Get W's size. */ | |
5f5c8ee5 GM |
432 | if (w) |
433 | { | |
6b61353c KH |
434 | window_box (w, -1, 0, 0, &window_width, &window_height); |
435 | ||
045dee35 GM |
436 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
437 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 438 | } |
045dee35 | 439 | matrix->header_line_p = header_line_p; |
23b0200c | 440 | |
6b61353c KH |
441 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
442 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
443 | haven't changed. This optimization is important because preserving |
444 | the matrix means preventing redisplay. */ | |
445 | if (matrix->pool == NULL) | |
446 | { | |
d3d50620 DA |
447 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
448 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
a54e2c05 | 449 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
450 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs |
451 | || right != matrix->right_margin_glyphs); | |
452 | ||
453 | if (!marginal_areas_changed_p | |
454 | && !fonts_changed_p | |
045dee35 | 455 | && !header_line_changed_p |
7df02016 KS |
456 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
457 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
458 | && matrix->window_height == window_height |
459 | && matrix->window_vscroll == w->vscroll | |
460 | && matrix->window_width == window_width) | |
461 | return; | |
462 | } | |
177c0ea7 | 463 | |
5f5c8ee5 GM |
464 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
465 | if (matrix->rows_allocated < dim.height) | |
466 | { | |
0065d054 | 467 | int old_alloc = matrix->rows_allocated; |
5f5c8ee5 | 468 | new_rows = dim.height - matrix->rows_allocated; |
0065d054 PE |
469 | matrix->rows = xpalloc (matrix->rows, &matrix->rows_allocated, |
470 | new_rows, INT_MAX, sizeof *matrix->rows); | |
471 | memset (matrix->rows + old_alloc, 0, | |
472 | (matrix->rows_allocated - old_alloc) * sizeof *matrix->rows); | |
5f5c8ee5 GM |
473 | } |
474 | else | |
475 | new_rows = 0; | |
60a8948a | 476 | |
5f5c8ee5 GM |
477 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
478 | on a frame not using window-based redisplay. Set up pointers for | |
479 | each row into the glyph pool. */ | |
480 | if (matrix->pool) | |
481 | { | |
a54e2c05 | 482 | eassert (matrix->pool->glyphs); |
177c0ea7 | 483 | |
5f5c8ee5 | 484 | if (w) |
60a8948a | 485 | { |
5f5c8ee5 | 486 | left = margin_glyphs_to_reserve (w, dim.width, |
d3d50620 | 487 | w->left_margin_cols); |
5f5c8ee5 | 488 | right = margin_glyphs_to_reserve (w, dim.width, |
d3d50620 | 489 | w->right_margin_cols); |
60a8948a | 490 | } |
5f5c8ee5 GM |
491 | else |
492 | left = right = 0; | |
177c0ea7 | 493 | |
5f5c8ee5 | 494 | for (i = 0; i < dim.height; ++i) |
60a8948a | 495 | { |
5f5c8ee5 | 496 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
497 | |
498 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
499 | = (matrix->pool->glyphs |
500 | + (y + i) * matrix->pool->ncolumns | |
501 | + x); | |
177c0ea7 | 502 | |
5f5c8ee5 GM |
503 | if (w == NULL |
504 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 505 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
506 | { |
507 | row->glyphs[TEXT_AREA] | |
508 | = row->glyphs[LEFT_MARGIN_AREA]; | |
509 | row->glyphs[RIGHT_MARGIN_AREA] | |
510 | = row->glyphs[TEXT_AREA] + dim.width; | |
511 | row->glyphs[LAST_AREA] | |
512 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
513 | } | |
514 | else | |
515 | { | |
516 | row->glyphs[TEXT_AREA] | |
517 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
518 | row->glyphs[RIGHT_MARGIN_AREA] | |
519 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
520 | row->glyphs[LAST_AREA] | |
521 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
522 | } | |
60a8948a | 523 | } |
177c0ea7 | 524 | |
5f5c8ee5 GM |
525 | matrix->left_margin_glyphs = left; |
526 | matrix->right_margin_glyphs = right; | |
527 | } | |
528 | else | |
529 | { | |
530 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
6b61353c KH |
531 | its own memory. It is a window matrix for window-based redisplay. |
532 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
533 | if (dim.width > matrix->matrix_w |
534 | || new_rows | |
045dee35 | 535 | || header_line_changed_p |
5f5c8ee5 | 536 | || marginal_areas_changed_p) |
4588ec20 | 537 | { |
5f5c8ee5 GM |
538 | struct glyph_row *row = matrix->rows; |
539 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 540 | |
5f5c8ee5 GM |
541 | while (row < end) |
542 | { | |
543 | row->glyphs[LEFT_MARGIN_AREA] | |
0065d054 PE |
544 | = xnrealloc (row->glyphs[LEFT_MARGIN_AREA], |
545 | dim.width, sizeof (struct glyph)); | |
177c0ea7 | 546 | |
5f5c8ee5 GM |
547 | /* The mode line never has marginal areas. */ |
548 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 549 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
550 | { |
551 | row->glyphs[TEXT_AREA] | |
552 | = row->glyphs[LEFT_MARGIN_AREA]; | |
553 | row->glyphs[RIGHT_MARGIN_AREA] | |
554 | = row->glyphs[TEXT_AREA] + dim.width; | |
555 | row->glyphs[LAST_AREA] | |
556 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
557 | } | |
558 | else | |
559 | { | |
560 | row->glyphs[TEXT_AREA] | |
561 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
562 | row->glyphs[RIGHT_MARGIN_AREA] | |
563 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
564 | row->glyphs[LAST_AREA] | |
565 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
566 | } | |
567 | ++row; | |
568 | } | |
4588ec20 JB |
569 | } |
570 | ||
a54e2c05 | 571 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
572 | matrix->left_margin_glyphs = left; |
573 | matrix->right_margin_glyphs = right; | |
574 | } | |
177c0ea7 | 575 | |
5f5c8ee5 GM |
576 | /* Number of rows to be used by MATRIX. */ |
577 | matrix->nrows = dim.height; | |
a54e2c05 | 578 | eassert (matrix->nrows >= 0); |
5f5c8ee5 | 579 | |
b7b20fbd | 580 | if (w) |
5f5c8ee5 | 581 | { |
b7b20fbd | 582 | if (matrix == w->current_matrix) |
4588ec20 | 583 | { |
b7b20fbd GM |
584 | /* Mark rows in a current matrix of a window as not having |
585 | valid contents. It's important to not do this for | |
586 | desired matrices. When Emacs starts, it may already be | |
587 | building desired matrices when this function runs. */ | |
588 | if (window_width < 0) | |
589 | window_width = window_box_width (w, -1); | |
177c0ea7 | 590 | |
b7b20fbd GM |
591 | /* Optimize the case that only the height has changed (C-x 2, |
592 | upper window). Invalidate all rows that are no longer part | |
593 | of the window. */ | |
594 | if (!marginal_areas_changed_p | |
73d75a62 GM |
595 | && !header_line_changed_p |
596 | && new_rows == 0 | |
597 | && dim.width == matrix->matrix_w | |
7df02016 KS |
598 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
599 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 600 | && matrix->window_width == window_width) |
b7b20fbd | 601 | { |
dd42b31a GM |
602 | /* Find the last row in the window. */ |
603 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
604 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
605 | { | |
26447967 | 606 | ++i; |
dd42b31a GM |
607 | break; |
608 | } | |
b7b20fbd GM |
609 | |
610 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 611 | are invalidated below. */ |
d3d50620 DA |
612 | if (INTEGERP (w->window_end_vpos) |
613 | && XFASTINT (w->window_end_vpos) >= i) | |
e8c17b81 | 614 | wset_window_end_valid (w, Qnil); |
177c0ea7 | 615 | |
b7b20fbd GM |
616 | while (i < matrix->nrows) |
617 | matrix->rows[i++].enabled_p = 0; | |
618 | } | |
619 | else | |
620 | { | |
621 | for (i = 0; i < matrix->nrows; ++i) | |
622 | matrix->rows[i].enabled_p = 0; | |
623 | } | |
5f5c8ee5 | 624 | } |
b7b20fbd | 625 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 626 | { |
b7b20fbd GM |
627 | /* Rows in desired matrices always have to be cleared; |
628 | redisplay expects this is the case when it runs, so it | |
629 | had better be the case when we adjust matrices between | |
630 | redisplays. */ | |
5f5c8ee5 GM |
631 | for (i = 0; i < matrix->nrows; ++i) |
632 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 633 | } |
4588ec20 | 634 | } |
177c0ea7 JB |
635 | |
636 | ||
5f5c8ee5 GM |
637 | /* Remember last values to be able to optimize frame redraws. */ |
638 | matrix->matrix_x = x; | |
639 | matrix->matrix_y = y; | |
640 | matrix->matrix_w = dim.width; | |
641 | matrix->matrix_h = dim.height; | |
642 | ||
643 | /* Record the top y location and height of W at the time the matrix | |
644 | was last adjusted. This is used to optimize redisplay above. */ | |
645 | if (w) | |
4588ec20 | 646 | { |
7df02016 KS |
647 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
648 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
649 | matrix->window_height = window_height; |
650 | matrix->window_width = window_width; | |
651 | matrix->window_vscroll = w->vscroll; | |
652 | } | |
653 | } | |
4588ec20 | 654 | |
4588ec20 | 655 | |
5f5c8ee5 GM |
656 | /* Reverse the contents of rows in MATRIX between START and END. The |
657 | contents of the row at END - 1 end up at START, END - 2 at START + | |
658 | 1 etc. This is part of the implementation of rotate_matrix (see | |
659 | below). */ | |
d52bad65 | 660 | |
5f5c8ee5 | 661 | static void |
971de7fb | 662 | reverse_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 GM |
663 | { |
664 | int i, j; | |
23b0200c | 665 | |
5f5c8ee5 GM |
666 | for (i = start, j = end - 1; i < j; ++i, --j) |
667 | { | |
668 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
669 | initialization. */ | |
670 | struct glyph_row temp; | |
671 | temp = matrix->rows[i]; | |
672 | matrix->rows[i] = matrix->rows[j]; | |
673 | matrix->rows[j] = temp; | |
674 | } | |
675 | } | |
23b0200c | 676 | |
23b0200c | 677 | |
5f5c8ee5 GM |
678 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
679 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
680 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
681 | row structures are moved around). | |
60a8948a | 682 | |
5f5c8ee5 GM |
683 | The algorithm used for rotating the vector was, I believe, first |
684 | described by Kernighan. See the vector R as consisting of two | |
685 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
686 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
687 | and reverse the result to get (ArBr)r which is BA. Similar for | |
688 | rotating right. */ | |
689 | ||
690 | void | |
971de7fb | 691 | rotate_matrix (struct glyph_matrix *matrix, int first, int last, int by) |
5f5c8ee5 GM |
692 | { |
693 | if (by < 0) | |
694 | { | |
695 | /* Up (rotate left, i.e. towards lower indices). */ | |
696 | by = -by; | |
697 | reverse_rows (matrix, first, first + by); | |
698 | reverse_rows (matrix, first + by, last); | |
699 | reverse_rows (matrix, first, last); | |
700 | } | |
701 | else if (by > 0) | |
702 | { | |
703 | /* Down (rotate right, i.e. towards higher indices). */ | |
704 | reverse_rows (matrix, last - by, last); | |
705 | reverse_rows (matrix, first, last - by); | |
706 | reverse_rows (matrix, first, last); | |
707 | } | |
708 | } | |
709 | ||
710 | ||
711 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
712 | with indices START <= index < END. Increment positions by DELTA/ | |
713 | DELTA_BYTES. */ | |
714 | ||
715 | void | |
ace1712c | 716 | increment_matrix_positions (struct glyph_matrix *matrix, int start, int end, |
d311d28c | 717 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
718 | { |
719 | /* Check that START and END are reasonable values. */ | |
a54e2c05 DA |
720 | eassert (start >= 0 && start <= matrix->nrows); |
721 | eassert (end >= 0 && end <= matrix->nrows); | |
722 | eassert (start <= end); | |
5f5c8ee5 GM |
723 | |
724 | for (; start < end; ++start) | |
86c11ba1 | 725 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
726 | } |
727 | ||
728 | ||
59ea14cd PE |
729 | /* Clear the enable_p flags in a range of rows in glyph matrix MATRIX. |
730 | START and END are the row indices of the first and last + 1 row to clear. */ | |
5f5c8ee5 GM |
731 | |
732 | void | |
59ea14cd | 733 | clear_glyph_matrix_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 | 734 | { |
a54e2c05 DA |
735 | eassert (start <= end); |
736 | eassert (start >= 0 && start < matrix->nrows); | |
737 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 738 | |
5f5c8ee5 | 739 | for (; start < end; ++start) |
59ea14cd | 740 | matrix->rows[start].enabled_p = 0; |
5f5c8ee5 GM |
741 | } |
742 | ||
743 | ||
744 | /* Clear MATRIX. | |
745 | ||
59ea14cd PE |
746 | Empty all rows in MATRIX by clearing their enabled_p flags. |
747 | The function prepare_desired_row will eventually really clear a row | |
748 | when it sees one with a false enabled_p flag. | |
5f5c8ee5 | 749 | |
59ea14cd | 750 | Reset update hints to default values. The only update hint |
5f5c8ee5 GM |
751 | currently present is the flag MATRIX->no_scrolling_p. */ |
752 | ||
753 | void | |
971de7fb | 754 | clear_glyph_matrix (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
755 | { |
756 | if (matrix) | |
757 | { | |
59ea14cd | 758 | clear_glyph_matrix_rows (matrix, 0, matrix->nrows); |
5f5c8ee5 GM |
759 | matrix->no_scrolling_p = 0; |
760 | } | |
761 | } | |
177c0ea7 | 762 | |
5f5c8ee5 GM |
763 | |
764 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
765 | Increment y-positions in glyph rows between START and END by DY, | |
766 | and recompute their visible height. */ | |
767 | ||
768 | void | |
971de7fb | 769 | shift_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int start, int end, int dy) |
5f5c8ee5 GM |
770 | { |
771 | int min_y, max_y; | |
177c0ea7 | 772 | |
a54e2c05 DA |
773 | eassert (start <= end); |
774 | eassert (start >= 0 && start < matrix->nrows); | |
775 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 776 | |
7df02016 KS |
777 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
778 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 779 | |
5f5c8ee5 GM |
780 | for (; start < end; ++start) |
781 | { | |
782 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 783 | |
5f5c8ee5 | 784 | row->y += dy; |
d6c747a4 | 785 | row->visible_height = row->height; |
177c0ea7 | 786 | |
5f5c8ee5 | 787 | if (row->y < min_y) |
d6c747a4 GM |
788 | row->visible_height -= min_y - row->y; |
789 | if (row->y + row->height > max_y) | |
790 | row->visible_height -= row->y + row->height - max_y; | |
e61124cd YM |
791 | if (row->fringe_bitmap_periodic_p) |
792 | row->redraw_fringe_bitmaps_p = 1; | |
5f5c8ee5 GM |
793 | } |
794 | } | |
795 | ||
796 | ||
797 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
798 | invalid is done by setting enabled_p to zero for all rows in a | |
799 | current matrix. */ | |
800 | ||
801 | void | |
971de7fb | 802 | clear_current_matrices (register struct frame *f) |
5f5c8ee5 GM |
803 | { |
804 | /* Clear frame current matrix, if we have one. */ | |
805 | if (f->current_matrix) | |
806 | clear_glyph_matrix (f->current_matrix); | |
807 | ||
808 | /* Clear the matrix of the menu bar window, if such a window exists. | |
809 | The menu bar window is currently used to display menus on X when | |
810 | no toolkit support is compiled in. */ | |
e69b0960 DA |
811 | if (WINDOWP (f->menu_bar_window)) |
812 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
5f5c8ee5 | 813 | |
9ea173e8 | 814 | /* Clear the matrix of the tool-bar window, if any. */ |
e69b0960 DA |
815 | if (WINDOWP (f->tool_bar_window)) |
816 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
5f5c8ee5 GM |
817 | |
818 | /* Clear current window matrices. */ | |
a54e2c05 | 819 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
820 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); |
821 | } | |
822 | ||
823 | ||
824 | /* Clear out all display lines of F for a coming redisplay. */ | |
825 | ||
826 | void | |
971de7fb | 827 | clear_desired_matrices (register struct frame *f) |
5f5c8ee5 GM |
828 | { |
829 | if (f->desired_matrix) | |
830 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 831 | |
e69b0960 DA |
832 | if (WINDOWP (f->menu_bar_window)) |
833 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
5f5c8ee5 | 834 | |
e69b0960 DA |
835 | if (WINDOWP (f->tool_bar_window)) |
836 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
5f5c8ee5 GM |
837 | |
838 | /* Do it for window matrices. */ | |
a54e2c05 | 839 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
840 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); |
841 | } | |
842 | ||
843 | ||
59ea14cd PE |
844 | /* Clear matrices in window tree rooted in W. If DESIRED_P, |
845 | clear desired matrices, otherwise clear current matrices. */ | |
5f5c8ee5 GM |
846 | |
847 | static void | |
59ea14cd | 848 | clear_window_matrices (struct window *w, bool desired_p) |
5f5c8ee5 GM |
849 | { |
850 | while (w) | |
851 | { | |
d3d50620 | 852 | if (!NILP (w->hchild)) |
5f5c8ee5 | 853 | { |
d3d50620 DA |
854 | eassert (WINDOWP (w->hchild)); |
855 | clear_window_matrices (XWINDOW (w->hchild), desired_p); | |
5f5c8ee5 | 856 | } |
d3d50620 | 857 | else if (!NILP (w->vchild)) |
5f5c8ee5 | 858 | { |
d3d50620 DA |
859 | eassert (WINDOWP (w->vchild)); |
860 | clear_window_matrices (XWINDOW (w->vchild), desired_p); | |
5f5c8ee5 GM |
861 | } |
862 | else | |
863 | { | |
864 | if (desired_p) | |
865 | clear_glyph_matrix (w->desired_matrix); | |
866 | else | |
867 | { | |
868 | clear_glyph_matrix (w->current_matrix); | |
e8c17b81 | 869 | wset_window_end_valid (w, Qnil); |
5f5c8ee5 GM |
870 | } |
871 | } | |
872 | ||
d3d50620 | 873 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
874 | } |
875 | } | |
876 | ||
877 | ||
878 | \f | |
879 | /*********************************************************************** | |
880 | Glyph Rows | |
881 | ||
882 | See dispextern.h for an overall explanation of glyph rows. | |
883 | ***********************************************************************/ | |
884 | ||
885 | /* Clear glyph row ROW. Do it in a way that makes it robust against | |
886 | changes in the glyph_row structure, i.e. addition or removal of | |
887 | structure members. */ | |
888 | ||
2cca872d KH |
889 | static struct glyph_row null_row; |
890 | ||
5f5c8ee5 | 891 | void |
971de7fb | 892 | clear_glyph_row (struct glyph_row *row) |
5f5c8ee5 GM |
893 | { |
894 | struct glyph *p[1 + LAST_AREA]; | |
5f5c8ee5 GM |
895 | |
896 | /* Save pointers. */ | |
897 | p[LEFT_MARGIN_AREA] = row->glyphs[LEFT_MARGIN_AREA]; | |
898 | p[TEXT_AREA] = row->glyphs[TEXT_AREA]; | |
899 | p[RIGHT_MARGIN_AREA] = row->glyphs[RIGHT_MARGIN_AREA]; | |
900 | p[LAST_AREA] = row->glyphs[LAST_AREA]; | |
901 | ||
902 | /* Clear. */ | |
903 | *row = null_row; | |
904 | ||
905 | /* Restore pointers. */ | |
906 | row->glyphs[LEFT_MARGIN_AREA] = p[LEFT_MARGIN_AREA]; | |
907 | row->glyphs[TEXT_AREA] = p[TEXT_AREA]; | |
908 | row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA]; | |
909 | row->glyphs[LAST_AREA] = p[LAST_AREA]; | |
45560b1a GM |
910 | |
911 | #if 0 /* At some point, some bit-fields of struct glyph were not set, | |
912 | which made glyphs unequal when compared with GLYPH_EQUAL_P. | |
913 | Redisplay outputs such glyphs, and flickering effects were | |
914 | the result. This also depended on the contents of memory | |
915 | returned by xmalloc. If flickering happens again, activate | |
153a073c | 916 | the code below. If the flickering is gone with that, chances |
45560b1a | 917 | are that the flickering has the same reason as here. */ |
72af86bd | 918 | memset (p[0], 0, (char *) p[LAST_AREA] - (char *) p[0]); |
45560b1a | 919 | #endif |
5f5c8ee5 GM |
920 | } |
921 | ||
922 | ||
923 | /* Make ROW an empty, enabled row of canonical character height, | |
924 | in window W starting at y-position Y. */ | |
925 | ||
926 | void | |
971de7fb | 927 | blank_row (struct window *w, struct glyph_row *row, int y) |
5f5c8ee5 GM |
928 | { |
929 | int min_y, max_y; | |
177c0ea7 | 930 | |
7df02016 KS |
931 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
932 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 933 | |
5f5c8ee5 GM |
934 | clear_glyph_row (row); |
935 | row->y = y; | |
408f5064 | 936 | row->ascent = row->phys_ascent = 0; |
d3d50620 | 937 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 938 | row->visible_height = row->height; |
177c0ea7 | 939 | |
5f5c8ee5 | 940 | if (row->y < min_y) |
d6c747a4 GM |
941 | row->visible_height -= min_y - row->y; |
942 | if (row->y + row->height > max_y) | |
943 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
944 | |
945 | row->enabled_p = 1; | |
946 | } | |
947 | ||
948 | ||
949 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
950 | are the amounts by which to change positions. Note that the first | |
951 | glyph of the text area of a row can have a buffer position even if | |
952 | the used count of the text area is zero. Such rows display line | |
953 | ends. */ | |
954 | ||
5bf46f05 | 955 | static void |
ace1712c | 956 | increment_row_positions (struct glyph_row *row, |
d311d28c | 957 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
958 | { |
959 | int area, i; | |
960 | ||
961 | /* Increment start and end positions. */ | |
962 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
963 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
964 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
965 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
d36fe237 EZ |
966 | CHARPOS (row->start.pos) += delta; |
967 | BYTEPOS (row->start.pos) += delta_bytes; | |
968 | CHARPOS (row->end.pos) += delta; | |
969 | BYTEPOS (row->end.pos) += delta_bytes; | |
5f5c8ee5 | 970 | |
5cacdcfd KS |
971 | if (!row->enabled_p) |
972 | return; | |
973 | ||
5f5c8ee5 GM |
974 | /* Increment positions in glyphs. */ |
975 | for (area = 0; area < LAST_AREA; ++area) | |
976 | for (i = 0; i < row->used[area]; ++i) | |
977 | if (BUFFERP (row->glyphs[area][i].object) | |
978 | && row->glyphs[area][i].charpos > 0) | |
979 | row->glyphs[area][i].charpos += delta; | |
980 | ||
981 | /* Capture the case of rows displaying a line end. */ | |
982 | if (row->used[TEXT_AREA] == 0 | |
983 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
984 | row->glyphs[TEXT_AREA]->charpos += delta; | |
985 | } | |
986 | ||
987 | ||
9af3e742 | 988 | #if 0 |
5f5c8ee5 GM |
989 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
990 | contents, i.e. glyph structure contents are exchanged between A and | |
991 | B without changing glyph pointers in A and B. */ | |
992 | ||
993 | static void | |
1dae0f0a | 994 | swap_glyphs_in_rows (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
995 | { |
996 | int area; | |
997 | ||
998 | for (area = 0; area < LAST_AREA; ++area) | |
999 | { | |
1000 | /* Number of glyphs to swap. */ | |
1001 | int max_used = max (a->used[area], b->used[area]); | |
1002 | ||
1003 | /* Start of glyphs in area of row A. */ | |
1004 | struct glyph *glyph_a = a->glyphs[area]; | |
1005 | ||
1006 | /* End + 1 of glyphs in area of row A. */ | |
1007 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
1008 | ||
1009 | /* Start of glyphs in area of row B. */ | |
1010 | struct glyph *glyph_b = b->glyphs[area]; | |
1011 | ||
1012 | while (glyph_a < glyph_a_end) | |
1013 | { | |
1014 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
1015 | initialization. */ | |
1016 | struct glyph temp; | |
1017 | temp = *glyph_a; | |
1018 | *glyph_a = *glyph_b; | |
1019 | *glyph_b = temp; | |
1020 | ++glyph_a; | |
1021 | ++glyph_b; | |
1022 | } | |
1023 | } | |
1024 | } | |
1025 | ||
9af3e742 | 1026 | #endif /* 0 */ |
5f5c8ee5 | 1027 | |
015137db EZ |
1028 | /* Exchange pointers to glyph memory between glyph rows A and B. Also |
1029 | exchange the used[] array and the hash values of the rows, because | |
1030 | these should all go together for the row's hash value to be | |
1031 | correct. */ | |
5f5c8ee5 | 1032 | |
55d4c1b2 | 1033 | static inline void |
971de7fb | 1034 | swap_glyph_pointers (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1035 | { |
1036 | int i; | |
015137db EZ |
1037 | unsigned hash_tem = a->hash; |
1038 | ||
5f5c8ee5 GM |
1039 | for (i = 0; i < LAST_AREA + 1; ++i) |
1040 | { | |
1041 | struct glyph *temp = a->glyphs[i]; | |
015137db | 1042 | |
5f5c8ee5 GM |
1043 | a->glyphs[i] = b->glyphs[i]; |
1044 | b->glyphs[i] = temp; | |
73055685 EZ |
1045 | if (i < LAST_AREA) |
1046 | { | |
1047 | short used_tem = a->used[i]; | |
1048 | ||
1049 | a->used[i] = b->used[i]; | |
1050 | b->used[i] = used_tem; | |
1051 | } | |
5f5c8ee5 | 1052 | } |
015137db EZ |
1053 | a->hash = b->hash; |
1054 | b->hash = hash_tem; | |
5f5c8ee5 GM |
1055 | } |
1056 | ||
1057 | ||
1058 | /* Copy glyph row structure FROM to glyph row structure TO, except | |
015137db EZ |
1059 | that glyph pointers, the `used' counts, and the hash values in the |
1060 | structures are left unchanged. */ | |
5f5c8ee5 | 1061 | |
55d4c1b2 | 1062 | static inline void |
971de7fb | 1063 | copy_row_except_pointers (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1064 | { |
1065 | struct glyph *pointers[1 + LAST_AREA]; | |
73055685 | 1066 | short used[LAST_AREA]; |
015137db | 1067 | unsigned hashval; |
5f5c8ee5 GM |
1068 | |
1069 | /* Save glyph pointers of TO. */ | |
72af86bd | 1070 | memcpy (pointers, to->glyphs, sizeof to->glyphs); |
015137db EZ |
1071 | memcpy (used, to->used, sizeof to->used); |
1072 | hashval = to->hash; | |
5f5c8ee5 GM |
1073 | |
1074 | /* Do a structure assignment. */ | |
1075 | *to = *from; | |
1076 | ||
1077 | /* Restore original pointers of TO. */ | |
72af86bd | 1078 | memcpy (to->glyphs, pointers, sizeof to->glyphs); |
015137db EZ |
1079 | memcpy (to->used, used, sizeof to->used); |
1080 | to->hash = hashval; | |
5f5c8ee5 GM |
1081 | } |
1082 | ||
1083 | ||
5f5c8ee5 GM |
1084 | /* Assign glyph row FROM to glyph row TO. This works like a structure |
1085 | assignment TO = FROM, except that glyph pointers are not copied but | |
1086 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1087 | a memory leak. */ | |
1088 | ||
55d4c1b2 | 1089 | static inline void |
971de7fb | 1090 | assign_row (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1091 | { |
1092 | swap_glyph_pointers (to, from); | |
1093 | copy_row_except_pointers (to, from); | |
1094 | } | |
1095 | ||
1096 | ||
1097 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1098 | a row in a window matrix, is a slice of the glyph memory of the | |
1099 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
59ea14cd | 1100 | is true if the glyph memory of WINDOW_ROW is part of the glyph |
5f5c8ee5 GM |
1101 | memory of FRAME_ROW. */ |
1102 | ||
e509cfa6 | 1103 | #ifdef GLYPH_DEBUG |
9339e87f | 1104 | |
59ea14cd | 1105 | static bool |
59fc5cf9 | 1106 | glyph_row_slice_p (struct glyph_row *window_row, struct glyph_row *frame_row) |
5f5c8ee5 GM |
1107 | { |
1108 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1109 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1110 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1111 | ||
1112 | return (frame_glyph_start <= window_glyph_start | |
1113 | && window_glyph_start < frame_glyph_end); | |
1114 | } | |
1115 | ||
9339e87f | 1116 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1117 | |
9af3e742 GM |
1118 | #if 0 |
1119 | ||
5f5c8ee5 GM |
1120 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1121 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1122 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1123 | ||
1124 | static struct glyph_row * | |
59fc5cf9 AS |
1125 | find_glyph_row_slice (struct glyph_matrix *window_matrix, |
1126 | struct glyph_matrix *frame_matrix, int row) | |
5f5c8ee5 GM |
1127 | { |
1128 | int i; | |
1129 | ||
a54e2c05 | 1130 | eassert (row >= 0 && row < frame_matrix->nrows); |
5f5c8ee5 GM |
1131 | |
1132 | for (i = 0; i < window_matrix->nrows; ++i) | |
1133 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1134 | frame_matrix->rows + row)) | |
1135 | break; | |
1136 | ||
1137 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1138 | } | |
1139 | ||
9af3e742 | 1140 | #endif /* 0 */ |
5f5c8ee5 GM |
1141 | |
1142 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1143 | i.e. they are only marked as to be cleared by setting their | |
1144 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1145 | call to this function really clears it. */ | |
1146 | ||
1147 | void | |
971de7fb | 1148 | prepare_desired_row (struct glyph_row *row) |
5f5c8ee5 GM |
1149 | { |
1150 | if (!row->enabled_p) | |
1151 | { | |
59ea14cd | 1152 | bool rp = row->reversed_p; |
5009f85e | 1153 | |
5f5c8ee5 GM |
1154 | clear_glyph_row (row); |
1155 | row->enabled_p = 1; | |
5009f85e | 1156 | row->reversed_p = rp; |
5f5c8ee5 GM |
1157 | } |
1158 | } | |
1159 | ||
1160 | ||
1161 | /* Return a hash code for glyph row ROW. */ | |
1162 | ||
2f7c71a1 | 1163 | static int |
971de7fb | 1164 | line_hash_code (struct glyph_row *row) |
5f5c8ee5 GM |
1165 | { |
1166 | int hash = 0; | |
177c0ea7 | 1167 | |
5f5c8ee5 GM |
1168 | if (row->enabled_p) |
1169 | { | |
4cecaab8 MB |
1170 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1171 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1172 | ||
1173 | while (glyph < end) | |
1174 | { | |
1175 | int c = glyph->u.ch; | |
1176 | int face_id = glyph->face_id; | |
daf01701 | 1177 | if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
4cecaab8 MB |
1178 | c -= SPACEGLYPH; |
1179 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1180 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1181 | ++glyph; | |
1182 | } | |
5f5c8ee5 | 1183 | |
4cecaab8 MB |
1184 | if (hash == 0) |
1185 | hash = 1; | |
5f5c8ee5 GM |
1186 | } |
1187 | ||
1188 | return hash; | |
1189 | } | |
1190 | ||
1191 | ||
153a073c | 1192 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1193 | the number of characters in the line. If must_write_spaces is |
1194 | zero, leading and trailing spaces are ignored. */ | |
1195 | ||
dfd153ae | 1196 | static int |
971de7fb | 1197 | line_draw_cost (struct glyph_matrix *matrix, int vpos) |
5f5c8ee5 GM |
1198 | { |
1199 | struct glyph_row *row = matrix->rows + vpos; | |
1200 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1201 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1202 | int len; | |
1203 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
ca9ce8f2 | 1204 | ptrdiff_t glyph_table_len = GLYPH_TABLE_LENGTH; |
5f5c8ee5 GM |
1205 | |
1206 | /* Ignore trailing and leading spaces if we can. */ | |
daf01701 | 1207 | if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
5f5c8ee5 GM |
1208 | { |
1209 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1210 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1211 | --end; |
1212 | ||
177c0ea7 | 1213 | /* All blank line. */ |
5f5c8ee5 GM |
1214 | if (end == beg) |
1215 | return 0; | |
1216 | ||
1217 | /* Skip over leading spaces. */ | |
1218 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1219 | ++beg; | |
1220 | } | |
1221 | ||
1222 | /* If we don't have a glyph-table, each glyph is one character, | |
1223 | so return the number of glyphs. */ | |
1224 | if (glyph_table_base == 0) | |
1225 | len = end - beg; | |
1226 | else | |
1227 | { | |
1228 | /* Otherwise, scan the glyphs and accumulate their total length | |
1229 | in LEN. */ | |
1230 | len = 0; | |
1231 | while (beg < end) | |
1232 | { | |
3fc809e2 | 1233 | GLYPH g; |
177c0ea7 | 1234 | |
3fc809e2 KS |
1235 | SET_GLYPH_FROM_CHAR_GLYPH (g, *beg); |
1236 | ||
565b39a8 | 1237 | if (GLYPH_INVALID_P (g) |
42186983 | 1238 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) |
5f5c8ee5 GM |
1239 | len += 1; |
1240 | else | |
1241 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1242 | |
5f5c8ee5 GM |
1243 | ++beg; |
1244 | } | |
1245 | } | |
177c0ea7 | 1246 | |
5f5c8ee5 GM |
1247 | return len; |
1248 | } | |
1249 | ||
1250 | ||
59ea14cd PE |
1251 | /* Return true if the glyph rows A and B have equal contents. |
1252 | MOUSE_FACE_P means compare the mouse_face_p flags of A and B, too. */ | |
5f5c8ee5 | 1253 | |
59ea14cd PE |
1254 | static inline bool |
1255 | row_equal_p (struct glyph_row *a, struct glyph_row *b, bool mouse_face_p) | |
5f5c8ee5 | 1256 | { |
a54e2c05 DA |
1257 | eassert (verify_row_hash (a)); |
1258 | eassert (verify_row_hash (b)); | |
7a7270dd | 1259 | |
5f5c8ee5 GM |
1260 | if (a == b) |
1261 | return 1; | |
1262 | else if (a->hash != b->hash) | |
1263 | return 0; | |
1264 | else | |
1265 | { | |
1266 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1267 | int area; | |
1268 | ||
e4e0bee9 GM |
1269 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1270 | return 0; | |
1271 | ||
5f5c8ee5 GM |
1272 | /* Compare glyphs. */ |
1273 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1274 | { | |
1275 | if (a->used[area] != b->used[area]) | |
1276 | return 0; | |
177c0ea7 | 1277 | |
5f5c8ee5 GM |
1278 | a_glyph = a->glyphs[area]; |
1279 | a_end = a_glyph + a->used[area]; | |
1280 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1281 | |
5f5c8ee5 GM |
1282 | while (a_glyph < a_end |
1283 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1284 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1285 | |
5f5c8ee5 GM |
1286 | if (a_glyph != a_end) |
1287 | return 0; | |
1288 | } | |
1289 | ||
6b61353c KH |
1290 | if (a->fill_line_p != b->fill_line_p |
1291 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1292 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
1293 | || a->left_fringe_face_id != b->left_fringe_face_id | |
e61124cd | 1294 | || a->left_fringe_offset != b->left_fringe_offset |
6b61353c KH |
1295 | || a->right_fringe_bitmap != b->right_fringe_bitmap |
1296 | || a->right_fringe_face_id != b->right_fringe_face_id | |
e61124cd YM |
1297 | || a->right_fringe_offset != b->right_fringe_offset |
1298 | || a->fringe_bitmap_periodic_p != b->fringe_bitmap_periodic_p | |
3d4a365f | 1299 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
6b61353c | 1300 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1301 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1302 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1303 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
918f4159 | 1304 | || a->reversed_p != b->reversed_p |
5f5c8ee5 GM |
1305 | /* Different partially visible characters on left margin. */ |
1306 | || a->x != b->x | |
1307 | /* Different height. */ | |
1308 | || a->ascent != b->ascent | |
408f5064 GM |
1309 | || a->phys_ascent != b->phys_ascent |
1310 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1311 | || a->visible_height != b->visible_height) |
1312 | return 0; | |
1313 | } | |
1314 | ||
1315 | return 1; | |
1316 | } | |
1317 | ||
1318 | ||
1319 | \f | |
1320 | /*********************************************************************** | |
1321 | Glyph Pool | |
1322 | ||
1323 | See dispextern.h for an overall explanation of glyph pools. | |
1324 | ***********************************************************************/ | |
1325 | ||
1326 | /* Allocate a glyph_pool structure. The structure returned is | |
1327 | initialized with zeros. The global variable glyph_pool_count is | |
1328 | incremented for each pool allocated. */ | |
1329 | ||
1330 | static struct glyph_pool * | |
971de7fb | 1331 | new_glyph_pool (void) |
5f5c8ee5 | 1332 | { |
23f86fce | 1333 | struct glyph_pool *result = xzalloc (sizeof *result); |
177c0ea7 | 1334 | |
5f5c8ee5 GM |
1335 | /* For memory leak and double deletion checking. */ |
1336 | ++glyph_pool_count; | |
177c0ea7 | 1337 | |
5f5c8ee5 GM |
1338 | return result; |
1339 | } | |
1340 | ||
1341 | ||
1342 | /* Free a glyph_pool structure POOL. The function may be called with | |
1343 | a null POOL pointer. The global variable glyph_pool_count is | |
1344 | decremented with every pool structure freed. If this count gets | |
1345 | negative, more structures were freed than allocated, i.e. one | |
1346 | structure must have been freed more than once or a bogus pointer | |
1347 | was passed to free_glyph_pool. */ | |
1348 | ||
1349 | static void | |
971de7fb | 1350 | free_glyph_pool (struct glyph_pool *pool) |
5f5c8ee5 GM |
1351 | { |
1352 | if (pool) | |
1353 | { | |
153a073c | 1354 | /* More freed than allocated? */ |
5f5c8ee5 | 1355 | --glyph_pool_count; |
a54e2c05 | 1356 | eassert (glyph_pool_count >= 0); |
5f5c8ee5 GM |
1357 | |
1358 | xfree (pool->glyphs); | |
1359 | xfree (pool); | |
1360 | } | |
1361 | } | |
1362 | ||
1363 | ||
1364 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1365 | columns we need. This function never shrinks a pool. The only | |
1366 | case in which this would make sense, would be when a frame's size | |
1367 | is changed from a large value to a smaller one. But, if someone | |
1368 | does it once, we can expect that he will do it again. | |
1369 | ||
59ea14cd | 1370 | Return true if the pool changed in a way which makes |
5f5c8ee5 GM |
1371 | re-adjusting window glyph matrices necessary. */ |
1372 | ||
59ea14cd | 1373 | static bool |
971de7fb | 1374 | realloc_glyph_pool (struct glyph_pool *pool, struct dim matrix_dim) |
5f5c8ee5 | 1375 | { |
ca9ce8f2 | 1376 | ptrdiff_t needed; |
59ea14cd | 1377 | bool changed_p; |
5f5c8ee5 GM |
1378 | |
1379 | changed_p = (pool->glyphs == 0 | |
1380 | || matrix_dim.height != pool->nrows | |
1381 | || matrix_dim.width != pool->ncolumns); | |
1382 | ||
1383 | /* Enlarge the glyph pool. */ | |
ca9ce8f2 | 1384 | needed = matrix_dim.width; |
0065d054 PE |
1385 | if (INT_MULTIPLY_OVERFLOW (needed, matrix_dim.height)) |
1386 | memory_full (SIZE_MAX); | |
ca9ce8f2 | 1387 | needed *= matrix_dim.height; |
5f5c8ee5 GM |
1388 | if (needed > pool->nglyphs) |
1389 | { | |
0065d054 PE |
1390 | ptrdiff_t old_nglyphs = pool->nglyphs; |
1391 | pool->glyphs = xpalloc (pool->glyphs, &pool->nglyphs, | |
1392 | needed - old_nglyphs, -1, sizeof *pool->glyphs); | |
1393 | memset (pool->glyphs + old_nglyphs, 0, | |
1394 | (pool->nglyphs - old_nglyphs) * sizeof *pool->glyphs); | |
5f5c8ee5 GM |
1395 | } |
1396 | ||
153a073c | 1397 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1398 | to do sanity checks, and (b) the number of columns determines |
1399 | where rows in the frame matrix start---this must be available to | |
1400 | determine pointers to rows of window sub-matrices. */ | |
1401 | pool->nrows = matrix_dim.height; | |
1402 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1403 | |
5f5c8ee5 GM |
1404 | return changed_p; |
1405 | } | |
1406 | ||
1407 | ||
1408 | \f | |
1409 | /*********************************************************************** | |
1410 | Debug Code | |
1411 | ***********************************************************************/ | |
1412 | ||
e509cfa6 | 1413 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 1414 | |
a13396c9 | 1415 | |
28d440ab KL |
1416 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1417 | XXX Maybe this should be changed to flush the current terminal instead of | |
1418 | stdout. | |
1419 | */ | |
a13396c9 | 1420 | |
85fece3e PE |
1421 | void flush_stdout (void) EXTERNALLY_VISIBLE; |
1422 | ||
a13396c9 | 1423 | void |
59fc5cf9 | 1424 | flush_stdout (void) |
a13396c9 GM |
1425 | { |
1426 | fflush (stdout); | |
1427 | } | |
1428 | ||
1429 | ||
5f5c8ee5 GM |
1430 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1431 | pointer has been lost, e.g. by using a structure assignment between | |
1432 | rows, at least one pointer must occur more than once in the rows of | |
1433 | MATRIX. */ | |
1434 | ||
1435 | void | |
59fc5cf9 | 1436 | check_matrix_pointer_lossage (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
1437 | { |
1438 | int i, j; | |
177c0ea7 | 1439 | |
5f5c8ee5 GM |
1440 | for (i = 0; i < matrix->nrows; ++i) |
1441 | for (j = 0; j < matrix->nrows; ++j) | |
a54e2c05 | 1442 | eassert (i == j |
5f5c8ee5 GM |
1443 | || (matrix->rows[i].glyphs[TEXT_AREA] |
1444 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1445 | } | |
1446 | ||
1447 | ||
1448 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1449 | ||
1450 | struct glyph_row * | |
59fc5cf9 | 1451 | matrix_row (struct glyph_matrix *matrix, int row) |
5f5c8ee5 | 1452 | { |
a54e2c05 DA |
1453 | eassert (matrix && matrix->rows); |
1454 | eassert (row >= 0 && row < matrix->nrows); | |
5f5c8ee5 GM |
1455 | |
1456 | /* That's really too slow for normal testing because this function | |
1457 | is called almost everywhere. Although---it's still astonishingly | |
1458 | fast, so it is valuable to have for debugging purposes. */ | |
1459 | #if 0 | |
1460 | check_matrix_pointer_lossage (matrix); | |
1461 | #endif | |
177c0ea7 | 1462 | |
5f5c8ee5 GM |
1463 | return matrix->rows + row; |
1464 | } | |
1465 | ||
1466 | ||
1467 | #if 0 /* This function makes invalid assumptions when text is | |
1468 | partially invisible. But it might come handy for debugging | |
1469 | nevertheless. */ | |
1470 | ||
1471 | /* Check invariants that must hold for an up to date current matrix of | |
1472 | window W. */ | |
1473 | ||
1474 | static void | |
59fc5cf9 | 1475 | check_matrix_invariants (struct window *w) |
5f5c8ee5 GM |
1476 | { |
1477 | struct glyph_matrix *matrix = w->current_matrix; | |
1478 | int yb = window_text_bottom_y (w); | |
1479 | struct glyph_row *row = matrix->rows; | |
1480 | struct glyph_row *last_text_row = NULL; | |
1481 | struct buffer *saved = current_buffer; | |
d3d50620 | 1482 | struct buffer *buffer = XBUFFER (w->buffer); |
5f5c8ee5 | 1483 | int c; |
177c0ea7 | 1484 | |
5f5c8ee5 GM |
1485 | /* This can sometimes happen for a fresh window. */ |
1486 | if (matrix->nrows < 2) | |
1487 | return; | |
1488 | ||
1489 | set_buffer_temp (buffer); | |
1490 | ||
1491 | /* Note: last row is always reserved for the mode line. */ | |
1492 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1493 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1494 | { | |
1495 | struct glyph_row *next = row + 1; | |
1496 | ||
1497 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1498 | last_text_row = row; | |
1499 | ||
1500 | /* Check that character and byte positions are in sync. */ | |
a54e2c05 | 1501 | eassert (MATRIX_ROW_START_BYTEPOS (row) |
5f5c8ee5 | 1502 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); |
a54e2c05 | 1503 | eassert (BYTEPOS (row->start.pos) |
d36fe237 | 1504 | == CHAR_TO_BYTE (CHARPOS (row->start.pos))); |
5f5c8ee5 GM |
1505 | |
1506 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1507 | have such a position temporarily in case of a minibuffer | |
1508 | displaying something like `[Sole completion]' at its end. */ | |
1509 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
d36fe237 | 1510 | { |
a54e2c05 | 1511 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
d36fe237 | 1512 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); |
a54e2c05 | 1513 | eassert (BYTEPOS (row->end.pos) |
d36fe237 EZ |
1514 | == CHAR_TO_BYTE (CHARPOS (row->end.pos))); |
1515 | } | |
5f5c8ee5 GM |
1516 | |
1517 | /* Check that end position of `row' is equal to start position | |
1518 | of next row. */ | |
1519 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1520 | { | |
a54e2c05 | 1521 | eassert (MATRIX_ROW_END_CHARPOS (row) |
5f5c8ee5 | 1522 | == MATRIX_ROW_START_CHARPOS (next)); |
a54e2c05 | 1523 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
5f5c8ee5 | 1524 | == MATRIX_ROW_START_BYTEPOS (next)); |
a54e2c05 DA |
1525 | eassert (CHARPOS (row->end.pos) == CHARPOS (next->start.pos)); |
1526 | eassert (BYTEPOS (row->end.pos) == BYTEPOS (next->start.pos)); | |
5f5c8ee5 GM |
1527 | } |
1528 | row = next; | |
1529 | } | |
1530 | ||
a54e2c05 DA |
1531 | eassert (w->current_matrix->nrows == w->desired_matrix->nrows); |
1532 | eassert (w->desired_matrix->rows != NULL); | |
5f5c8ee5 GM |
1533 | set_buffer_temp (saved); |
1534 | } | |
1535 | ||
1536 | #endif /* 0 */ | |
1537 | ||
e509cfa6 | 1538 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
1539 | |
1540 | ||
1541 | \f | |
1542 | /********************************************************************** | |
1543 | Allocating/ Adjusting Glyph Matrices | |
1544 | **********************************************************************/ | |
1545 | ||
1546 | /* Allocate glyph matrices over a window tree for a frame-based | |
1547 | redisplay | |
1548 | ||
1549 | X and Y are column/row within the frame glyph matrix where | |
1550 | sub-matrices for the window tree rooted at WINDOW must be | |
59ea14cd | 1551 | allocated. DIM_ONLY_P means that the caller of this |
8ce2650d YM |
1552 | function is only interested in the result matrix dimension, and |
1553 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1554 | |
1555 | The function returns the total width/height of the sub-matrices of | |
1556 | the window tree. If called on a frame root window, the computation | |
1557 | will take the mini-buffer window into account. | |
1558 | ||
1559 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1560 | ||
1561 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1562 | glyph matrices yet, and | |
1563 | ||
1564 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1565 | any window in the tree will be changed or have been changed (see | |
153a073c | 1566 | DIM_ONLY_P) |
5f5c8ee5 GM |
1567 | |
1568 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1569 | function. | |
1570 | ||
1571 | Windows are arranged into chains of windows on the same level | |
1572 | through the next fields of window structures. Such a level can be | |
1573 | either a sequence of horizontally adjacent windows from left to | |
1574 | right, or a sequence of vertically adjacent windows from top to | |
1575 | bottom. Each window in a horizontal sequence can be either a leaf | |
1576 | window or a vertical sequence; a window in a vertical sequence can | |
1577 | be either a leaf or a horizontal sequence. All windows in a | |
1578 | horizontal sequence have the same height, and all windows in a | |
1579 | vertical sequence have the same width. | |
1580 | ||
1581 | This function uses, for historical reasons, a more general | |
1582 | algorithm to determine glyph matrix dimensions that would be | |
1583 | necessary. | |
1584 | ||
1585 | The matrix height of a horizontal sequence is determined by the | |
1586 | maximum height of any matrix in the sequence. The matrix width of | |
1587 | a horizontal sequence is computed by adding up matrix widths of | |
1588 | windows in the sequence. | |
1589 | ||
1590 | |<------- result width ------->| | |
1591 | +---------+----------+---------+ --- | |
1592 | | | | | | | |
1593 | | | | | | |
1594 | +---------+ | | result height | |
1595 | | +---------+ | |
1596 | | | | | |
1597 | +----------+ --- | |
1598 | ||
1599 | The matrix width of a vertical sequence is the maximum matrix width | |
1600 | of any window in the sequence. Its height is computed by adding up | |
1601 | matrix heights of windows in the sequence. | |
1602 | ||
1603 | |<---- result width -->| | |
1604 | +---------+ --- | |
1605 | | | | | |
1606 | | | | | |
1607 | +---------+--+ | | |
1608 | | | | | |
1609 | | | result height | |
1610 | | | | |
1611 | +------------+---------+ | | |
1612 | | | | | |
1613 | | | | | |
1614 | +------------+---------+ --- */ | |
1615 | ||
1616 | /* Bit indicating that a new matrix will be allocated or has been | |
1617 | allocated. */ | |
1618 | ||
1619 | #define NEW_LEAF_MATRIX (1 << 0) | |
1620 | ||
1621 | /* Bit indicating that a matrix will or has changed its location or | |
1622 | size. */ | |
1623 | ||
1624 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1625 | ||
1626 | static struct dim | |
6f704c76 | 1627 | allocate_matrices_for_frame_redisplay (Lisp_Object window, int x, int y, |
59ea14cd | 1628 | bool dim_only_p, int *window_change_flags) |
5f5c8ee5 GM |
1629 | { |
1630 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1631 | int x0 = x, y0 = y; | |
1632 | int wmax = 0, hmax = 0; | |
1633 | struct dim total; | |
1634 | struct dim dim; | |
1635 | struct window *w; | |
59ea14cd | 1636 | bool in_horz_combination_p; |
5f5c8ee5 GM |
1637 | |
1638 | /* What combination is WINDOW part of? Compute this once since the | |
1639 | result is the same for all windows in the `next' chain. The | |
1640 | special case of a root window (parent equal to nil) is treated | |
1641 | like a vertical combination because a root window's `next' | |
1642 | points to the mini-buffer window, if any, which is arranged | |
1643 | vertically below other windows. */ | |
1644 | in_horz_combination_p | |
d3d50620 DA |
1645 | = (!NILP (XWINDOW (window)->parent) |
1646 | && !NILP (XWINDOW (XWINDOW (window)->parent)->hchild)); | |
5f5c8ee5 GM |
1647 | |
1648 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1649 | do |
5f5c8ee5 GM |
1650 | { |
1651 | w = XWINDOW (window); | |
1652 | ||
1653 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1654 | on whether this is a combination or a leaf window. */ |
d3d50620 DA |
1655 | if (!NILP (w->hchild)) |
1656 | dim = allocate_matrices_for_frame_redisplay (w->hchild, x, y, | |
5f5c8ee5 GM |
1657 | dim_only_p, |
1658 | window_change_flags); | |
d3d50620 DA |
1659 | else if (!NILP (w->vchild)) |
1660 | dim = allocate_matrices_for_frame_redisplay (w->vchild, x, y, | |
5f5c8ee5 GM |
1661 | dim_only_p, |
1662 | window_change_flags); | |
1663 | else | |
1664 | { | |
1665 | /* If not already done, allocate sub-matrix structures. */ | |
1666 | if (w->desired_matrix == NULL) | |
1667 | { | |
1668 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1669 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1670 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1671 | } | |
177c0ea7 | 1672 | |
5f5c8ee5 GM |
1673 | /* Width and height MUST be chosen so that there are no |
1674 | holes in the frame matrix. */ | |
5d3cc43c GM |
1675 | dim.width = required_matrix_width (w); |
1676 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1677 | |
1678 | /* Will matrix be re-allocated? */ | |
1679 | if (x != w->desired_matrix->matrix_x | |
1680 | || y != w->desired_matrix->matrix_y | |
1681 | || dim.width != w->desired_matrix->matrix_w | |
1682 | || dim.height != w->desired_matrix->matrix_h | |
1683 | || (margin_glyphs_to_reserve (w, dim.width, | |
d3d50620 | 1684 | w->left_margin_cols) |
5f5c8ee5 GM |
1685 | != w->desired_matrix->left_margin_glyphs) |
1686 | || (margin_glyphs_to_reserve (w, dim.width, | |
d3d50620 | 1687 | w->right_margin_cols) |
5f5c8ee5 GM |
1688 | != w->desired_matrix->right_margin_glyphs)) |
1689 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1690 | ||
1691 | /* Actually change matrices, if allowed. Do not consider | |
1692 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1693 | may have been changed which we don't now here. We trust | |
59ea14cd | 1694 | that we only will be called with DIM_ONLY_P when |
5f5c8ee5 GM |
1695 | necessary. */ |
1696 | if (!dim_only_p) | |
1697 | { | |
1698 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1699 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1700 | } | |
1701 | } | |
1702 | ||
1703 | /* If we are part of a horizontal combination, advance x for | |
1704 | windows to the right of W; otherwise advance y for windows | |
1705 | below W. */ | |
1706 | if (in_horz_combination_p) | |
1707 | x += dim.width; | |
177c0ea7 | 1708 | else |
5f5c8ee5 GM |
1709 | y += dim.height; |
1710 | ||
1711 | /* Remember maximum glyph matrix dimensions. */ | |
1712 | wmax = max (wmax, dim.width); | |
1713 | hmax = max (hmax, dim.height); | |
1714 | ||
1715 | /* Next window on same level. */ | |
d3d50620 | 1716 | window = w->next; |
5f5c8ee5 GM |
1717 | } |
1718 | while (!NILP (window)); | |
1719 | ||
1720 | /* Set `total' to the total glyph matrix dimension of this window | |
1721 | level. In a vertical combination, the width is the width of the | |
1722 | widest window; the height is the y we finally reached, corrected | |
1723 | by the y we started with. In a horizontal combination, the total | |
1724 | height is the height of the tallest window, and the width is the | |
1725 | x we finally reached, corrected by the x we started with. */ | |
1726 | if (in_horz_combination_p) | |
1727 | { | |
1728 | total.width = x - x0; | |
1729 | total.height = hmax; | |
1730 | } | |
177c0ea7 | 1731 | else |
5f5c8ee5 GM |
1732 | { |
1733 | total.width = wmax; | |
1734 | total.height = y - y0; | |
1735 | } | |
1736 | ||
1737 | return total; | |
1738 | } | |
1739 | ||
1740 | ||
5d3cc43c GM |
1741 | /* Return the required height of glyph matrices for window W. */ |
1742 | ||
2f7c71a1 | 1743 | static int |
971de7fb | 1744 | required_matrix_height (struct window *w) |
5d3cc43c GM |
1745 | { |
1746 | #ifdef HAVE_WINDOW_SYSTEM | |
d3d50620 | 1747 | struct frame *f = XFRAME (w->frame); |
177c0ea7 | 1748 | |
5d3cc43c GM |
1749 | if (FRAME_WINDOW_P (f)) |
1750 | { | |
1751 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1ea40aa2 | 1752 | int window_pixel_height = window_box_height (w) + eabs (w->vscroll); |
5d3cc43c | 1753 | return (((window_pixel_height + ch_height - 1) |
cc834cf9 | 1754 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
1755 | /* One partially visible line at the top and |
1756 | bottom of the window. */ | |
1757 | + 2 | |
153a073c | 1758 | /* 2 for header and mode line. */ |
5d3cc43c GM |
1759 | + 2); |
1760 | } | |
1761 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 1762 | |
7df02016 | 1763 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
1764 | } |
1765 | ||
1766 | ||
1767 | /* Return the required width of glyph matrices for window W. */ | |
1768 | ||
2f7c71a1 | 1769 | static int |
971de7fb | 1770 | required_matrix_width (struct window *w) |
5d3cc43c GM |
1771 | { |
1772 | #ifdef HAVE_WINDOW_SYSTEM | |
d3d50620 | 1773 | struct frame *f = XFRAME (w->frame); |
5d3cc43c GM |
1774 | if (FRAME_WINDOW_P (f)) |
1775 | { | |
1776 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 1777 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 1778 | |
5d3cc43c GM |
1779 | /* Compute number of glyphs needed in a glyph row. */ |
1780 | return (((window_pixel_width + ch_width - 1) | |
cc834cf9 | 1781 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
1782 | /* 2 partially visible columns in the text area. */ |
1783 | + 2 | |
1784 | /* One partially visible column at the right | |
1785 | edge of each marginal area. */ | |
1786 | + 1 + 1); | |
1787 | } | |
1788 | #endif /* HAVE_WINDOW_SYSTEM */ | |
1789 | ||
d3d50620 | 1790 | return XINT (w->total_cols); |
5d3cc43c GM |
1791 | } |
1792 | ||
1793 | ||
5f5c8ee5 | 1794 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 1795 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 1796 | |
5f5c8ee5 | 1797 | static void |
971de7fb | 1798 | allocate_matrices_for_window_redisplay (struct window *w) |
5f5c8ee5 | 1799 | { |
5f5c8ee5 GM |
1800 | while (w) |
1801 | { | |
d3d50620 DA |
1802 | if (!NILP (w->vchild)) |
1803 | allocate_matrices_for_window_redisplay (XWINDOW (w->vchild)); | |
1804 | else if (!NILP (w->hchild)) | |
1805 | allocate_matrices_for_window_redisplay (XWINDOW (w->hchild)); | |
5f5c8ee5 GM |
1806 | else |
1807 | { | |
1808 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
1809 | struct dim dim; |
1810 | ||
1811 | /* If matrices are not yet allocated, allocate them now. */ | |
1812 | if (w->desired_matrix == NULL) | |
1813 | { | |
1814 | w->desired_matrix = new_glyph_matrix (NULL); | |
1815 | w->current_matrix = new_glyph_matrix (NULL); | |
1816 | } | |
1817 | ||
5d3cc43c GM |
1818 | dim.width = required_matrix_width (w); |
1819 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1820 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
1821 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
1822 | } | |
177c0ea7 | 1823 | |
d3d50620 | 1824 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
5f5c8ee5 GM |
1825 | } |
1826 | } | |
1827 | ||
1828 | ||
1829 | /* Re-allocate/ re-compute glyph matrices on frame F. If F is null, | |
1830 | do it for all frames; otherwise do it just for the given frame. | |
1831 | This function must be called when a new frame is created, its size | |
1832 | changes, or its window configuration changes. */ | |
1833 | ||
1834 | void | |
971de7fb | 1835 | adjust_glyphs (struct frame *f) |
5f5c8ee5 | 1836 | { |
408f5064 GM |
1837 | /* Block input so that expose events and other events that access |
1838 | glyph matrices are not processed while we are changing them. */ | |
1839 | BLOCK_INPUT; | |
1840 | ||
5f5c8ee5 GM |
1841 | if (f) |
1842 | adjust_frame_glyphs (f); | |
1843 | else | |
1844 | { | |
1845 | Lisp_Object tail, lisp_frame; | |
177c0ea7 | 1846 | |
5f5c8ee5 GM |
1847 | FOR_EACH_FRAME (tail, lisp_frame) |
1848 | adjust_frame_glyphs (XFRAME (lisp_frame)); | |
1849 | } | |
408f5064 GM |
1850 | |
1851 | UNBLOCK_INPUT; | |
5f5c8ee5 GM |
1852 | } |
1853 | ||
1854 | ||
1855 | /* Adjust frame glyphs when Emacs is initialized. | |
177c0ea7 JB |
1856 | |
1857 | To be called from init_display. | |
1858 | ||
5f5c8ee5 GM |
1859 | We need a glyph matrix because redraw will happen soon. |
1860 | Unfortunately, window sizes on selected_frame are not yet set to | |
1861 | meaningful values. I believe we can assume that there are only two | |
1862 | windows on the frame---the mini-buffer and the root window. Frame | |
1863 | height and width seem to be correct so far. So, set the sizes of | |
1864 | windows to estimated values. */ | |
1865 | ||
1866 | static void | |
971de7fb | 1867 | adjust_frame_glyphs_initially (void) |
5f5c8ee5 | 1868 | { |
91fb7e1b | 1869 | struct frame *sf = SELECTED_FRAME (); |
e69b0960 | 1870 | struct window *root = XWINDOW (sf->root_window); |
d3d50620 | 1871 | struct window *mini = XWINDOW (root->next); |
7df02016 KS |
1872 | int frame_lines = FRAME_LINES (sf); |
1873 | int frame_cols = FRAME_COLS (sf); | |
91fb7e1b | 1874 | int top_margin = FRAME_TOP_MARGIN (sf); |
5f5c8ee5 GM |
1875 | |
1876 | /* Do it for the root window. */ | |
e8c17b81 PE |
1877 | wset_top_line (root, make_number (top_margin)); |
1878 | wset_total_lines (root, make_number (frame_lines - 1 - top_margin)); | |
1879 | wset_total_cols (root, make_number (frame_cols)); | |
5f5c8ee5 GM |
1880 | |
1881 | /* Do it for the mini-buffer window. */ | |
e8c17b81 PE |
1882 | wset_top_line (mini, make_number (frame_lines - 1)); |
1883 | wset_total_lines (mini, make_number (1)); | |
1884 | wset_total_cols (mini, make_number (frame_cols)); | |
5f5c8ee5 | 1885 | |
91fb7e1b | 1886 | adjust_frame_glyphs (sf); |
5f5c8ee5 GM |
1887 | glyphs_initialized_initially_p = 1; |
1888 | } | |
177c0ea7 | 1889 | |
5f5c8ee5 GM |
1890 | |
1891 | /* Allocate/reallocate glyph matrices of a single frame F. */ | |
1892 | ||
1893 | static void | |
971de7fb | 1894 | adjust_frame_glyphs (struct frame *f) |
5f5c8ee5 GM |
1895 | { |
1896 | if (FRAME_WINDOW_P (f)) | |
1897 | adjust_frame_glyphs_for_window_redisplay (f); | |
1898 | else | |
1899 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 1900 | |
5f5c8ee5 GM |
1901 | /* Don't forget the message buffer and the buffer for |
1902 | decode_mode_spec. */ | |
1903 | adjust_frame_message_buffer (f); | |
1904 | adjust_decode_mode_spec_buffer (f); | |
1905 | ||
1906 | f->glyphs_initialized_p = 1; | |
1907 | } | |
1908 | ||
59ea14cd | 1909 | /* Return true if any window in the tree has nonzero window margins. See |
075757cc | 1910 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ |
59ea14cd | 1911 | static bool |
971de7fb | 1912 | showing_window_margins_p (struct window *w) |
075757cc CY |
1913 | { |
1914 | while (w) | |
1915 | { | |
d3d50620 | 1916 | if (!NILP (w->hchild)) |
075757cc | 1917 | { |
d3d50620 | 1918 | if (showing_window_margins_p (XWINDOW (w->hchild))) |
075757cc CY |
1919 | return 1; |
1920 | } | |
d3d50620 | 1921 | else if (!NILP (w->vchild)) |
075757cc | 1922 | { |
d3d50620 | 1923 | if (showing_window_margins_p (XWINDOW (w->vchild))) |
075757cc CY |
1924 | return 1; |
1925 | } | |
d3d50620 DA |
1926 | else if (!NILP (w->left_margin_cols) |
1927 | || !NILP (w->right_margin_cols)) | |
075757cc | 1928 | return 1; |
3fc809e2 | 1929 | |
d3d50620 | 1930 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
075757cc CY |
1931 | } |
1932 | return 0; | |
1933 | } | |
1934 | ||
5f5c8ee5 | 1935 | |
c9f00270 GM |
1936 | /* In the window tree with root W, build current matrices of leaf |
1937 | windows from the frame's current matrix. */ | |
1938 | ||
1939 | static void | |
971de7fb | 1940 | fake_current_matrices (Lisp_Object window) |
c9f00270 GM |
1941 | { |
1942 | struct window *w; | |
177c0ea7 | 1943 | |
d3d50620 | 1944 | for (; !NILP (window); window = w->next) |
c9f00270 GM |
1945 | { |
1946 | w = XWINDOW (window); | |
177c0ea7 | 1947 | |
d3d50620 DA |
1948 | if (!NILP (w->hchild)) |
1949 | fake_current_matrices (w->hchild); | |
1950 | else if (!NILP (w->vchild)) | |
1951 | fake_current_matrices (w->vchild); | |
c9f00270 GM |
1952 | else |
1953 | { | |
1954 | int i; | |
d3d50620 | 1955 | struct frame *f = XFRAME (w->frame); |
c9f00270 GM |
1956 | struct glyph_matrix *m = w->current_matrix; |
1957 | struct glyph_matrix *fm = f->current_matrix; | |
1958 | ||
a54e2c05 DA |
1959 | eassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
1960 | eassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 1961 | |
c9f00270 GM |
1962 | for (i = 0; i < m->matrix_h; ++i) |
1963 | { | |
1964 | struct glyph_row *r = m->rows + i; | |
7df02016 | 1965 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 | 1966 | |
a54e2c05 | 1967 | eassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] |
c9f00270 GM |
1968 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); |
1969 | ||
1970 | r->enabled_p = fr->enabled_p; | |
1971 | if (r->enabled_p) | |
1972 | { | |
1973 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
1974 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
1975 | r->used[TEXT_AREA] = (m->matrix_w | |
1976 | - r->used[LEFT_MARGIN_AREA] | |
1977 | - r->used[RIGHT_MARGIN_AREA]); | |
1978 | r->mode_line_p = 0; | |
c9f00270 GM |
1979 | } |
1980 | } | |
1981 | } | |
1982 | } | |
1983 | } | |
1984 | ||
1985 | ||
bccee4f2 | 1986 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 1987 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 1988 | |
bccee4f2 | 1989 | static struct glyph_matrix * |
971de7fb | 1990 | save_current_matrix (struct frame *f) |
c9f00270 | 1991 | { |
bccee4f2 | 1992 | int i; |
38182d90 | 1993 | struct glyph_matrix *saved = xzalloc (sizeof *saved); |
bccee4f2 | 1994 | saved->nrows = f->current_matrix->nrows; |
23f86fce | 1995 | saved->rows = xzalloc (saved->nrows * sizeof *saved->rows); |
bccee4f2 GM |
1996 | |
1997 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 1998 | { |
bccee4f2 GM |
1999 | struct glyph_row *from = f->current_matrix->rows + i; |
2000 | struct glyph_row *to = saved->rows + i; | |
dfd153ae | 2001 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
23f86fce | 2002 | to->glyphs[TEXT_AREA] = xmalloc (nbytes); |
72af86bd | 2003 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
bccee4f2 | 2004 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
e797dea6 | 2005 | } |
bccee4f2 GM |
2006 | |
2007 | return saved; | |
2008 | } | |
2009 | ||
2010 | ||
2011 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
2012 | and free memory associated with SAVED. */ | |
2013 | ||
2014 | static void | |
971de7fb | 2015 | restore_current_matrix (struct frame *f, struct glyph_matrix *saved) |
bccee4f2 GM |
2016 | { |
2017 | int i; | |
2018 | ||
2019 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 2020 | { |
bccee4f2 GM |
2021 | struct glyph_row *from = saved->rows + i; |
2022 | struct glyph_row *to = f->current_matrix->rows + i; | |
dfd153ae | 2023 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
72af86bd | 2024 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
e797dea6 | 2025 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
bccee4f2 | 2026 | xfree (from->glyphs[TEXT_AREA]); |
e797dea6 | 2027 | } |
177c0ea7 | 2028 | |
bccee4f2 GM |
2029 | xfree (saved->rows); |
2030 | xfree (saved); | |
c9f00270 GM |
2031 | } |
2032 | ||
2033 | ||
bccee4f2 | 2034 | |
5f5c8ee5 GM |
2035 | /* Allocate/reallocate glyph matrices of a single frame F for |
2036 | frame-based redisplay. */ | |
2037 | ||
2038 | static void | |
971de7fb | 2039 | adjust_frame_glyphs_for_frame_redisplay (struct frame *f) |
5f5c8ee5 | 2040 | { |
5f5c8ee5 | 2041 | struct dim matrix_dim; |
59ea14cd | 2042 | bool pool_changed_p; |
5f5c8ee5 GM |
2043 | int window_change_flags; |
2044 | int top_window_y; | |
2045 | ||
2046 | if (!FRAME_LIVE_P (f)) | |
2047 | return; | |
2048 | ||
5f5c8ee5 GM |
2049 | top_window_y = FRAME_TOP_MARGIN (f); |
2050 | ||
2051 | /* Allocate glyph pool structures if not already done. */ | |
2052 | if (f->desired_pool == NULL) | |
2053 | { | |
2054 | f->desired_pool = new_glyph_pool (); | |
2055 | f->current_pool = new_glyph_pool (); | |
2056 | } | |
2057 | ||
2058 | /* Allocate frames matrix structures if needed. */ | |
2059 | if (f->desired_matrix == NULL) | |
2060 | { | |
2061 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
2062 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
2063 | } | |
177c0ea7 | 2064 | |
5f5c8ee5 GM |
2065 | /* Compute window glyph matrices. (This takes the mini-buffer |
2066 | window into account). The result is the size of the frame glyph | |
2067 | matrix needed. The variable window_change_flags is set to a bit | |
2068 | mask indicating whether new matrices will be allocated or | |
2069 | existing matrices change their size or location within the frame | |
2070 | matrix. */ | |
2071 | window_change_flags = 0; | |
2072 | matrix_dim | |
2073 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
2074 | 0, top_window_y, | |
5d3cc43c | 2075 | 1, |
5f5c8ee5 GM |
2076 | &window_change_flags); |
2077 | ||
2078 | /* Add in menu bar lines, if any. */ | |
2079 | matrix_dim.height += top_window_y; | |
2080 | ||
2081 | /* Enlarge pools as necessary. */ | |
2082 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
2083 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
2084 | ||
177c0ea7 | 2085 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
2086 | absolutely necessary since it requires a frame redraw. */ |
2087 | if (pool_changed_p || window_change_flags) | |
2088 | { | |
2089 | /* Do it for window matrices. */ | |
2090 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 2091 | 0, top_window_y, 0, |
5f5c8ee5 GM |
2092 | &window_change_flags); |
2093 | ||
2094 | /* Size of frame matrices must equal size of frame. Note | |
2095 | that we are called for X frames with window widths NOT equal | |
2096 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
a54e2c05 | 2097 | eassert (matrix_dim.width == FRAME_COLS (f) |
7df02016 | 2098 | && matrix_dim.height == FRAME_LINES (f)); |
177c0ea7 | 2099 | |
e797dea6 GM |
2100 | /* Pointers to glyph memory in glyph rows are exchanged during |
2101 | the update phase of redisplay, which means in general that a | |
2102 | frame's current matrix consists of pointers into both the | |
2103 | desired and current glyph pool of the frame. Adjusting a | |
2104 | matrix sets the frame matrix up so that pointers are all into | |
2105 | the same pool. If we want to preserve glyph contents of the | |
2106 | current matrix over a call to adjust_glyph_matrix, we must | |
2107 | make a copy of the current glyphs, and restore the current | |
2108 | matrix' contents from that copy. */ | |
2109 | if (display_completed | |
2110 | && !FRAME_GARBAGED_P (f) | |
2111 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
2112 | && matrix_dim.height == f->current_matrix->matrix_h |
2113 | /* For some reason, the frame glyph matrix gets corrupted if | |
2114 | any of the windows contain margins. I haven't been able | |
2115 | to hunt down the reason, but for the moment this prevents | |
2116 | the problem from manifesting. -- cyd */ | |
d5c20fe8 | 2117 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) |
e797dea6 | 2118 | { |
bccee4f2 GM |
2119 | struct glyph_matrix *copy = save_current_matrix (f); |
2120 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2121 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2122 | restore_current_matrix (f, copy); |
e797dea6 GM |
2123 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2124 | } | |
c9f00270 | 2125 | else |
e797dea6 | 2126 | { |
bccee4f2 | 2127 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2128 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2129 | SET_FRAME_GARBAGED (f); | |
2130 | } | |
5f5c8ee5 GM |
2131 | } |
2132 | } | |
2133 | ||
2134 | ||
2135 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2136 | window-based redisplay. */ | |
2137 | ||
2138 | static void | |
971de7fb | 2139 | adjust_frame_glyphs_for_window_redisplay (struct frame *f) |
5f5c8ee5 | 2140 | { |
a54e2c05 | 2141 | eassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); |
177c0ea7 | 2142 | |
5f5c8ee5 | 2143 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2144 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2145 | |
8ce2650d | 2146 | #ifdef HAVE_X_WINDOWS |
5f5c8ee5 GM |
2147 | /* Allocate/ reallocate matrices of the dummy window used to display |
2148 | the menu bar under X when no X toolkit support is available. */ | |
488dd4c4 | 2149 | #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2150 | { |
2151 | /* Allocate a dummy window if not already done. */ | |
d2d37ddc | 2152 | struct window *w; |
e69b0960 | 2153 | if (NILP (f->menu_bar_window)) |
5f5c8ee5 | 2154 | { |
077288cf | 2155 | Lisp_Object frame; |
f00af5b1 | 2156 | fset_menu_bar_window (f, make_window ()); |
e69b0960 | 2157 | w = XWINDOW (f->menu_bar_window); |
077288cf | 2158 | XSETFRAME (frame, f); |
e8c17b81 | 2159 | wset_frame (w, frame); |
5f5c8ee5 GM |
2160 | w->pseudo_window_p = 1; |
2161 | } | |
2162 | else | |
e69b0960 | 2163 | w = XWINDOW (f->menu_bar_window); |
5f5c8ee5 GM |
2164 | |
2165 | /* Set window dimensions to frame dimensions and allocate or | |
2166 | adjust glyph matrices of W. */ | |
e8c17b81 PE |
2167 | wset_top_line (w, make_number (0)); |
2168 | wset_left_col (w, make_number (0)); | |
2169 | wset_total_lines (w, make_number (FRAME_MENU_BAR_LINES (f))); | |
2170 | wset_total_cols (w, make_number (FRAME_TOTAL_COLS (f))); | |
5d3cc43c | 2171 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2172 | } |
57714a86 YM |
2173 | #endif /* not USE_X_TOOLKIT && not USE_GTK */ |
2174 | #endif /* HAVE_X_WINDOWS */ | |
5f5c8ee5 | 2175 | |
488dd4c4 | 2176 | #ifndef USE_GTK |
d2d37ddc PE |
2177 | { |
2178 | /* Allocate/ reallocate matrices of the tool bar window. If we | |
2179 | don't have a tool bar window yet, make one. */ | |
2180 | struct window *w; | |
e69b0960 | 2181 | if (NILP (f->tool_bar_window)) |
d2d37ddc | 2182 | { |
077288cf | 2183 | Lisp_Object frame; |
f00af5b1 | 2184 | fset_tool_bar_window (f, make_window ()); |
e69b0960 | 2185 | w = XWINDOW (f->tool_bar_window); |
077288cf | 2186 | XSETFRAME (frame, f); |
e8c17b81 | 2187 | wset_frame (w, frame); |
d2d37ddc PE |
2188 | w->pseudo_window_p = 1; |
2189 | } | |
2190 | else | |
e69b0960 | 2191 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2192 | |
e8c17b81 PE |
2193 | wset_top_line (w, make_number (FRAME_MENU_BAR_LINES (f))); |
2194 | wset_left_col (w, make_number (0)); | |
2195 | wset_total_lines (w, make_number (FRAME_TOOL_BAR_LINES (f))); | |
2196 | wset_total_cols (w, make_number (FRAME_TOTAL_COLS (f))); | |
d2d37ddc PE |
2197 | allocate_matrices_for_window_redisplay (w); |
2198 | } | |
488dd4c4 | 2199 | #endif |
5f5c8ee5 GM |
2200 | } |
2201 | ||
2202 | ||
177c0ea7 | 2203 | /* Adjust/ allocate message buffer of frame F. |
5f5c8ee5 | 2204 | |
5f5c8ee5 GM |
2205 | Note that the message buffer is never freed. Since I could not |
2206 | find a free in 19.34, I assume that freeing it would be | |
2207 | problematic in some way and don't do it either. | |
2208 | ||
2209 | (Implementation note: It should be checked if we can free it | |
2210 | eventually without causing trouble). */ | |
2211 | ||
2212 | static void | |
971de7fb | 2213 | adjust_frame_message_buffer (struct frame *f) |
5f5c8ee5 | 2214 | { |
38182d90 PE |
2215 | FRAME_MESSAGE_BUF (f) = xrealloc (FRAME_MESSAGE_BUF (f), |
2216 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
5f5c8ee5 GM |
2217 | } |
2218 | ||
2219 | ||
2220 | /* Re-allocate buffer for decode_mode_spec on frame F. */ | |
2221 | ||
2222 | static void | |
971de7fb | 2223 | adjust_decode_mode_spec_buffer (struct frame *f) |
5f5c8ee5 | 2224 | { |
38182d90 PE |
2225 | f->decode_mode_spec_buffer = xrealloc (f->decode_mode_spec_buffer, |
2226 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
5f5c8ee5 GM |
2227 | } |
2228 | ||
2229 | ||
2230 | \f | |
2231 | /********************************************************************** | |
2232 | Freeing Glyph Matrices | |
2233 | **********************************************************************/ | |
2234 | ||
2235 | /* Free glyph memory for a frame F. F may be null. This function can | |
2236 | be called for the same frame more than once. The root window of | |
2237 | F may be nil when this function is called. This is the case when | |
2238 | the function is called when F is destroyed. */ | |
2239 | ||
2240 | void | |
971de7fb | 2241 | free_glyphs (struct frame *f) |
5f5c8ee5 GM |
2242 | { |
2243 | if (f && f->glyphs_initialized_p) | |
2244 | { | |
42f55fe0 GM |
2245 | /* Block interrupt input so that we don't get surprised by an X |
2246 | event while we're in an inconsistent state. */ | |
2247 | BLOCK_INPUT; | |
5f5c8ee5 | 2248 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2249 | |
5f5c8ee5 | 2250 | /* Release window sub-matrices. */ |
e69b0960 DA |
2251 | if (!NILP (f->root_window)) |
2252 | free_window_matrices (XWINDOW (f->root_window)); | |
5f5c8ee5 GM |
2253 | |
2254 | /* Free the dummy window for menu bars without X toolkit and its | |
2255 | glyph matrices. */ | |
e69b0960 | 2256 | if (!NILP (f->menu_bar_window)) |
5f5c8ee5 | 2257 | { |
e69b0960 | 2258 | struct window *w = XWINDOW (f->menu_bar_window); |
5f5c8ee5 GM |
2259 | free_glyph_matrix (w->desired_matrix); |
2260 | free_glyph_matrix (w->current_matrix); | |
2261 | w->desired_matrix = w->current_matrix = NULL; | |
f00af5b1 | 2262 | fset_menu_bar_window (f, Qnil); |
5f5c8ee5 GM |
2263 | } |
2264 | ||
9ea173e8 | 2265 | /* Free the tool bar window and its glyph matrices. */ |
e69b0960 | 2266 | if (!NILP (f->tool_bar_window)) |
5f5c8ee5 | 2267 | { |
e69b0960 | 2268 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2269 | free_glyph_matrix (w->desired_matrix); |
2270 | free_glyph_matrix (w->current_matrix); | |
2271 | w->desired_matrix = w->current_matrix = NULL; | |
f00af5b1 | 2272 | fset_tool_bar_window (f, Qnil); |
5f5c8ee5 GM |
2273 | } |
2274 | ||
2275 | /* Release frame glyph matrices. Reset fields to zero in | |
2276 | case we are called a second time. */ | |
2277 | if (f->desired_matrix) | |
2278 | { | |
2279 | free_glyph_matrix (f->desired_matrix); | |
2280 | free_glyph_matrix (f->current_matrix); | |
2281 | f->desired_matrix = f->current_matrix = NULL; | |
2282 | } | |
2283 | ||
2284 | /* Release glyph pools. */ | |
2285 | if (f->desired_pool) | |
2286 | { | |
2287 | free_glyph_pool (f->desired_pool); | |
2288 | free_glyph_pool (f->current_pool); | |
2289 | f->desired_pool = f->current_pool = NULL; | |
2290 | } | |
177c0ea7 | 2291 | |
42f55fe0 | 2292 | UNBLOCK_INPUT; |
5f5c8ee5 GM |
2293 | } |
2294 | } | |
2295 | ||
2296 | ||
2297 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2298 | function may be called with a null pointer, and it may be called on | |
2299 | the same tree more than once. */ | |
2300 | ||
2301 | void | |
971de7fb | 2302 | free_window_matrices (struct window *w) |
5f5c8ee5 GM |
2303 | { |
2304 | while (w) | |
2305 | { | |
d3d50620 DA |
2306 | if (!NILP (w->hchild)) |
2307 | free_window_matrices (XWINDOW (w->hchild)); | |
2308 | else if (!NILP (w->vchild)) | |
2309 | free_window_matrices (XWINDOW (w->vchild)); | |
177c0ea7 | 2310 | else |
5f5c8ee5 GM |
2311 | { |
2312 | /* This is a leaf window. Free its memory and reset fields | |
2313 | to zero in case this function is called a second time for | |
2314 | W. */ | |
2315 | free_glyph_matrix (w->current_matrix); | |
2316 | free_glyph_matrix (w->desired_matrix); | |
2317 | w->current_matrix = w->desired_matrix = NULL; | |
2318 | } | |
2319 | ||
2320 | /* Next window on same level. */ | |
d3d50620 | 2321 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2322 | } |
2323 | } | |
2324 | ||
2325 | ||
2326 | /* Check glyph memory leaks. This function is called from | |
2327 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2328 | exits. We therefore free all glyph memory for all active frames | |
2329 | explicitly and check that nothing is left allocated. */ | |
2330 | ||
2331 | void | |
971de7fb | 2332 | check_glyph_memory (void) |
5f5c8ee5 GM |
2333 | { |
2334 | Lisp_Object tail, frame; | |
2335 | ||
2336 | /* Free glyph memory for all frames. */ | |
2337 | FOR_EACH_FRAME (tail, frame) | |
2338 | free_glyphs (XFRAME (frame)); | |
2339 | ||
2340 | /* Check that nothing is left allocated. */ | |
2341 | if (glyph_matrix_count) | |
1088b922 | 2342 | emacs_abort (); |
5f5c8ee5 | 2343 | if (glyph_pool_count) |
1088b922 | 2344 | emacs_abort (); |
5f5c8ee5 GM |
2345 | } |
2346 | ||
2347 | ||
2348 | \f | |
2349 | /********************************************************************** | |
2350 | Building a Frame Matrix | |
2351 | **********************************************************************/ | |
2352 | ||
2353 | /* Most of the redisplay code works on glyph matrices attached to | |
2354 | windows. This is a good solution most of the time, but it is not | |
2355 | suitable for terminal code. Terminal output functions cannot rely | |
2356 | on being able to set an arbitrary terminal window. Instead they | |
2357 | must be provided with a view of the whole frame, i.e. the whole | |
2358 | screen. We build such a view by constructing a frame matrix from | |
2359 | window matrices in this section. | |
2360 | ||
2361 | Windows that must be updated have their must_be_update_p flag set. | |
2362 | For all such windows, their desired matrix is made part of the | |
2363 | desired frame matrix. For other windows, their current matrix is | |
2364 | made part of the desired frame matrix. | |
2365 | ||
2366 | +-----------------+----------------+ | |
2367 | | desired | desired | | |
2368 | | | | | |
2369 | +-----------------+----------------+ | |
2370 | | current | | |
2371 | | | | |
2372 | +----------------------------------+ | |
2373 | ||
2374 | Desired window matrices can be made part of the frame matrix in a | |
2375 | cheap way: We exploit the fact that the desired frame matrix and | |
2376 | desired window matrices share their glyph memory. This is not | |
2377 | possible for current window matrices. Their glyphs are copied to | |
2378 | the desired frame matrix. The latter is equivalent to | |
2379 | preserve_other_columns in the old redisplay. | |
2380 | ||
2381 | Used glyphs counters for frame matrix rows are the result of adding | |
2382 | up glyph lengths of the window matrices. A line in the frame | |
2383 | matrix is enabled, if a corresponding line in a window matrix is | |
2384 | enabled. | |
177c0ea7 | 2385 | |
5f5c8ee5 GM |
2386 | After building the desired frame matrix, it will be passed to |
2387 | terminal code, which will manipulate both the desired and current | |
2388 | frame matrix. Changes applied to the frame's current matrix have | |
2389 | to be visible in current window matrices afterwards, of course. | |
2390 | ||
2391 | This problem is solved like this: | |
2392 | ||
2393 | 1. Window and frame matrices share glyphs. Window matrices are | |
2394 | constructed in a way that their glyph contents ARE the glyph | |
2395 | contents needed in a frame matrix. Thus, any modification of | |
2396 | glyphs done in terminal code will be reflected in window matrices | |
2397 | automatically. | |
177c0ea7 | 2398 | |
5f5c8ee5 GM |
2399 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2400 | intercepted by hook functions so that corresponding row operations | |
2401 | on window matrices can be performed. This is necessary because we | |
2402 | use pointers to glyphs in glyph row structures. To satisfy the | |
2403 | assumption of point 1 above that glyphs are updated implicitly in | |
2404 | window matrices when they are manipulated via the frame matrix, | |
2405 | window and frame matrix must of course agree where to find the | |
2406 | glyphs for their rows. Possible manipulations that must be | |
2407 | mirrored are assignments of rows of the desired frame matrix to the | |
2408 | current frame matrix and scrolling the current frame matrix. */ | |
2409 | ||
2410 | /* Build frame F's desired matrix from window matrices. Only windows | |
2411 | which have the flag must_be_updated_p set have to be updated. Menu | |
2412 | bar lines of a frame are not covered by window matrices, so make | |
2413 | sure not to touch them in this function. */ | |
2414 | ||
2415 | static void | |
971de7fb | 2416 | build_frame_matrix (struct frame *f) |
5f5c8ee5 GM |
2417 | { |
2418 | int i; | |
2419 | ||
2420 | /* F must have a frame matrix when this function is called. */ | |
a54e2c05 | 2421 | eassert (!FRAME_WINDOW_P (f)); |
177c0ea7 | 2422 | |
5f5c8ee5 GM |
2423 | /* Clear all rows in the frame matrix covered by window matrices. |
2424 | Menu bar lines are not covered by windows. */ | |
2425 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2426 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2427 | ||
2428 | /* Build the matrix by walking the window tree. */ | |
2429 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2430 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2431 | } | |
2432 | ||
2433 | ||
2434 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2435 | matrices. W is the root of a window tree. */ | |
2436 | ||
2437 | static void | |
971de7fb | 2438 | build_frame_matrix_from_window_tree (struct glyph_matrix *matrix, struct window *w) |
5f5c8ee5 GM |
2439 | { |
2440 | while (w) | |
2441 | { | |
d3d50620 DA |
2442 | if (!NILP (w->hchild)) |
2443 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->hchild)); | |
2444 | else if (!NILP (w->vchild)) | |
2445 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->vchild)); | |
5f5c8ee5 GM |
2446 | else |
2447 | build_frame_matrix_from_leaf_window (matrix, w); | |
2448 | ||
d3d50620 | 2449 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2450 | } |
2451 | } | |
2452 | ||
2453 | ||
2454 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2455 | desired frame matrix built. W is a leaf window whose desired or | |
2456 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2457 | must_be_updated_p determines which matrix it contributes to | |
59ea14cd | 2458 | FRAME_MATRIX. If W->must_be_updated_p, W's desired matrix |
5f5c8ee5 GM |
2459 | is added to FRAME_MATRIX, otherwise W's current matrix is added. |
2460 | Adding a desired matrix means setting up used counters and such in | |
2461 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2462 | means copying glyphs. The latter case corresponds to | |
2463 | preserve_other_columns in the old redisplay. */ | |
2464 | ||
2465 | static void | |
971de7fb | 2466 | build_frame_matrix_from_leaf_window (struct glyph_matrix *frame_matrix, struct window *w) |
5f5c8ee5 GM |
2467 | { |
2468 | struct glyph_matrix *window_matrix; | |
2469 | int window_y, frame_y; | |
2470 | /* If non-zero, a glyph to insert at the right border of W. */ | |
3fc809e2 KS |
2471 | GLYPH right_border_glyph; |
2472 | ||
2473 | SET_GLYPH_FROM_CHAR (right_border_glyph, 0); | |
5f5c8ee5 GM |
2474 | |
2475 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2476 | if (w->must_be_updated_p) | |
2477 | { | |
2478 | window_matrix = w->desired_matrix; | |
2479 | ||
2480 | /* Decide whether we want to add a vertical border glyph. */ | |
2481 | if (!WINDOW_RIGHTMOST_P (w)) | |
2482 | { | |
2483 | struct Lisp_Char_Table *dp = window_display_table (w); | |
3fc809e2 | 2484 | Lisp_Object gc; |
b4e49aee | 2485 | |
3fc809e2 KS |
2486 | SET_GLYPH_FROM_CHAR (right_border_glyph, '|'); |
2487 | if (dp | |
d311d28c | 2488 | && (gc = DISP_BORDER_GLYPH (dp), GLYPH_CODE_P (gc))) |
3fc809e2 KS |
2489 | { |
2490 | SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph, gc); | |
2491 | spec_glyph_lookup_face (w, &right_border_glyph); | |
2492 | } | |
b4e49aee | 2493 | |
3fc809e2 KS |
2494 | if (GLYPH_FACE (right_border_glyph) <= 0) |
2495 | SET_GLYPH_FACE (right_border_glyph, VERTICAL_BORDER_FACE_ID); | |
5f5c8ee5 GM |
2496 | } |
2497 | } | |
2498 | else | |
2499 | window_matrix = w->current_matrix; | |
2500 | ||
2501 | /* For all rows in the window matrix and corresponding rows in the | |
2502 | frame matrix. */ | |
2503 | window_y = 0; | |
2504 | frame_y = window_matrix->matrix_y; | |
2505 | while (window_y < window_matrix->nrows) | |
2506 | { | |
2507 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2508 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
59ea14cd | 2509 | bool current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2510 | |
2511 | /* Fill up the frame row with spaces up to the left margin of the | |
2512 | window row. */ | |
2513 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2514 | ||
2515 | /* Fill up areas in the window matrix row with spaces. */ | |
2516 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2517 | |
2518 | /* If only part of W's desired matrix has been built, and | |
2519 | window_row wasn't displayed, use the corresponding current | |
2520 | row instead. */ | |
2521 | if (window_matrix == w->desired_matrix | |
2522 | && !window_row->enabled_p) | |
2523 | { | |
2524 | window_row = w->current_matrix->rows + window_y; | |
2525 | current_row_p = 1; | |
2526 | } | |
177c0ea7 | 2527 | |
2a8bd25f | 2528 | if (current_row_p) |
5f5c8ee5 | 2529 | { |
2a8bd25f | 2530 | /* Copy window row to frame row. */ |
72af86bd AS |
2531 | memcpy (frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, |
2532 | window_row->glyphs[0], | |
2533 | window_matrix->matrix_w * sizeof (struct glyph)); | |
5f5c8ee5 GM |
2534 | } |
2535 | else | |
2536 | { | |
a54e2c05 | 2537 | eassert (window_row->enabled_p); |
177c0ea7 | 2538 | |
2a8bd25f GM |
2539 | /* Only when a desired row has been displayed, we want |
2540 | the corresponding frame row to be updated. */ | |
2541 | frame_row->enabled_p = 1; | |
177c0ea7 | 2542 | |
5f5c8ee5 GM |
2543 | /* Maybe insert a vertical border between horizontally adjacent |
2544 | windows. */ | |
3fc809e2 | 2545 | if (GLYPH_CHAR (right_border_glyph) != 0) |
5f5c8ee5 GM |
2546 | { |
2547 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2548 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2549 | } | |
2550 | ||
e509cfa6 | 2551 | #ifdef GLYPH_DEBUG |
a13396c9 GM |
2552 | /* Window row window_y must be a slice of frame row |
2553 | frame_y. */ | |
a54e2c05 | 2554 | eassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2555 | |
5f5c8ee5 GM |
2556 | /* If rows are in sync, we don't have to copy glyphs because |
2557 | frame and window share glyphs. */ | |
177c0ea7 | 2558 | |
a38634ff | 2559 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2560 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2561 | #endif |
5f5c8ee5 GM |
2562 | } |
2563 | ||
2564 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2565 | up with spaces, and visit leaf windows from left to right it | |
2566 | can be done simply. */ | |
177c0ea7 | 2567 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2568 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2569 | ||
5f5c8ee5 GM |
2570 | /* Next row. */ |
2571 | ++window_y; | |
2572 | ++frame_y; | |
2573 | } | |
2574 | } | |
2575 | ||
5f81871e RS |
2576 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2577 | ID, return a glyph that has a realized face ID. | |
2578 | This is used for glyphs displayed specially and not part of the text; | |
2579 | for instance, vertical separators, truncation markers, etc. */ | |
2580 | ||
3fc809e2 | 2581 | void |
971de7fb | 2582 | spec_glyph_lookup_face (struct window *w, GLYPH *glyph) |
5f81871e | 2583 | { |
3fc809e2 | 2584 | int lface_id = GLYPH_FACE (*glyph); |
5f81871e RS |
2585 | /* Convert the glyph's specified face to a realized (cache) face. */ |
2586 | if (lface_id > 0) | |
2587 | { | |
d3d50620 | 2588 | int face_id = merge_faces (XFRAME (w->frame), |
5f81871e | 2589 | Qt, lface_id, DEFAULT_FACE_ID); |
3fc809e2 | 2590 | SET_GLYPH_FACE (*glyph, face_id); |
5f81871e | 2591 | } |
5f81871e | 2592 | } |
5f5c8ee5 GM |
2593 | |
2594 | /* Add spaces to a glyph row ROW in a window matrix. | |
2595 | ||
2596 | Each row has the form: | |
2597 | ||
2598 | +---------+-----------------------------+------------+ | |
2599 | | left | text | right | | |
2600 | +---------+-----------------------------+------------+ | |
2601 | ||
2602 | Left and right marginal areas are optional. This function adds | |
2603 | spaces to areas so that there are no empty holes between areas. | |
2604 | In other words: If the right area is not empty, the text area | |
2605 | is filled up with spaces up to the right area. If the text area | |
2606 | is not empty, the left area is filled up. | |
2607 | ||
2608 | To be called for frame-based redisplay, only. */ | |
2609 | ||
2610 | static void | |
971de7fb | 2611 | fill_up_glyph_row_with_spaces (struct glyph_row *row) |
5f5c8ee5 GM |
2612 | { |
2613 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2614 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2615 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2616 | } | |
2617 | ||
2618 | ||
2619 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2620 | frame-based redisplay only. */ | |
2621 | ||
2622 | static void | |
971de7fb | 2623 | fill_up_glyph_row_area_with_spaces (struct glyph_row *row, int area) |
5f5c8ee5 GM |
2624 | { |
2625 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2626 | { | |
2627 | struct glyph *end = row->glyphs[area + 1]; | |
2628 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2629 | ||
2630 | while (text < end) | |
2631 | *text++ = space_glyph; | |
2632 | row->used[area] = text - row->glyphs[area]; | |
2633 | } | |
2634 | } | |
2635 | ||
2636 | ||
2637 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2638 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2639 | ||
2640 | static void | |
971de7fb | 2641 | fill_up_frame_row_with_spaces (struct glyph_row *row, int upto) |
5f5c8ee5 GM |
2642 | { |
2643 | int i = row->used[TEXT_AREA]; | |
2644 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2645 | |
5f5c8ee5 GM |
2646 | while (i < upto) |
2647 | glyph[i++] = space_glyph; | |
2648 | ||
2649 | row->used[TEXT_AREA] = i; | |
2650 | } | |
2651 | ||
2652 | ||
2653 | \f | |
2654 | /********************************************************************** | |
2655 | Mirroring operations on frame matrices in window matrices | |
2656 | **********************************************************************/ | |
2657 | ||
2658 | /* Set frame being updated via frame-based redisplay to F. This | |
2659 | function must be called before updates to make explicit that we are | |
2660 | working on frame matrices or not. */ | |
2661 | ||
55d4c1b2 | 2662 | static inline void |
971de7fb | 2663 | set_frame_matrix_frame (struct frame *f) |
5f5c8ee5 GM |
2664 | { |
2665 | frame_matrix_frame = f; | |
2666 | } | |
2667 | ||
2668 | ||
2669 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2670 | DESIRED_MATRIX is the desired matrix corresponding to | |
2671 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2672 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2673 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2674 | done in frame matrices, and that we have to perform analogous | |
2675 | operations in window matrices of frame_matrix_frame. */ | |
2676 | ||
55d4c1b2 | 2677 | static inline void |
971de7fb | 2678 | make_current (struct glyph_matrix *desired_matrix, struct glyph_matrix *current_matrix, int row) |
5f5c8ee5 GM |
2679 | { |
2680 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2681 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
59ea14cd | 2682 | bool mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2683 | |
2684 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2685 | between both rows, and does a structure assignment otherwise. */ | |
2686 | assign_row (current_row, desired_row); | |
2687 | ||
2688 | /* Enable current_row to mark it as valid. */ | |
2689 | current_row->enabled_p = 1; | |
e876ff42 | 2690 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2691 | |
2692 | /* If we are called on frame matrices, perform analogous operations | |
2693 | for window matrices. */ | |
2694 | if (frame_matrix_frame) | |
e69b0960 | 2695 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); |
5f5c8ee5 GM |
2696 | } |
2697 | ||
2698 | ||
2699 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2700 | W's frame which has been made current (by swapping pointers between | |
2701 | current and desired matrix). Perform analogous operations in the | |
2702 | matrices of leaf windows in the window tree rooted at W. */ | |
2703 | ||
2704 | static void | |
971de7fb | 2705 | mirror_make_current (struct window *w, int frame_row) |
5f5c8ee5 GM |
2706 | { |
2707 | while (w) | |
2708 | { | |
d3d50620 DA |
2709 | if (!NILP (w->hchild)) |
2710 | mirror_make_current (XWINDOW (w->hchild), frame_row); | |
2711 | else if (!NILP (w->vchild)) | |
2712 | mirror_make_current (XWINDOW (w->vchild), frame_row); | |
5f5c8ee5 GM |
2713 | else |
2714 | { | |
2715 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2716 | here because the checks performed in debug mode there | |
2717 | will not allow the conversion. */ | |
2718 | int row = frame_row - w->desired_matrix->matrix_y; | |
2719 | ||
2720 | /* If FRAME_ROW is within W, assign the desired row to the | |
2721 | current row (exchanging glyph pointers). */ | |
2722 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
2723 | { | |
2724 | struct glyph_row *current_row | |
2725 | = MATRIX_ROW (w->current_matrix, row); | |
2726 | struct glyph_row *desired_row | |
2727 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
2728 | |
2729 | if (desired_row->enabled_p) | |
2730 | assign_row (current_row, desired_row); | |
2731 | else | |
2732 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 | 2733 | current_row->enabled_p = 1; |
d009ae66 EZ |
2734 | |
2735 | /* Set the Y coordinate of the mode/header line's row. | |
2736 | It is needed in draw_row_with_mouse_face to find the | |
2737 | screen coordinates. (Window-based redisplay sets | |
2738 | this in update_window, but no one seems to do that | |
2739 | for frame-based redisplay.) */ | |
2740 | if (current_row->mode_line_p) | |
2741 | current_row->y = row; | |
5f5c8ee5 GM |
2742 | } |
2743 | } | |
177c0ea7 | 2744 | |
d3d50620 | 2745 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2746 | } |
2747 | } | |
2748 | ||
2749 | ||
2750 | /* Perform row dance after scrolling. We are working on the range of | |
2751 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
2752 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
2753 | row I in the range 0 <= I < NLINES, the index of the original line | |
2754 | to move to I. This index is relative to the row range, i.e. 0 <= | |
2755 | index < NLINES. RETAINED_P is a vector containing zero for each | |
2756 | row 0 <= I < NLINES which is empty. | |
2757 | ||
2758 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 2759 | |
5f5c8ee5 | 2760 | void |
6f704c76 DN |
2761 | mirrored_line_dance (struct glyph_matrix *matrix, int unchanged_at_top, int nlines, |
2762 | int *copy_from, char *retained_p) | |
5f5c8ee5 GM |
2763 | { |
2764 | /* A copy of original rows. */ | |
2765 | struct glyph_row *old_rows; | |
2766 | ||
2767 | /* Rows to assign to. */ | |
2768 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 2769 | |
5f5c8ee5 GM |
2770 | int i; |
2771 | ||
2772 | /* Make a copy of the original rows. */ | |
38182d90 | 2773 | old_rows = alloca (nlines * sizeof *old_rows); |
72af86bd | 2774 | memcpy (old_rows, new_rows, nlines * sizeof *old_rows); |
5f5c8ee5 GM |
2775 | |
2776 | /* Assign new rows, maybe clear lines. */ | |
2777 | for (i = 0; i < nlines; ++i) | |
2778 | { | |
59ea14cd | 2779 | bool enabled_before_p = new_rows[i].enabled_p; |
5f5c8ee5 | 2780 | |
a54e2c05 DA |
2781 | eassert (i + unchanged_at_top < matrix->nrows); |
2782 | eassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
5f5c8ee5 GM |
2783 | new_rows[i] = old_rows[copy_from[i]]; |
2784 | new_rows[i].enabled_p = enabled_before_p; | |
2785 | ||
2786 | /* RETAINED_P is zero for empty lines. */ | |
2787 | if (!retained_p[copy_from[i]]) | |
2788 | new_rows[i].enabled_p = 0; | |
2789 | } | |
2790 | ||
153a073c | 2791 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 | 2792 | if (frame_matrix_frame) |
e69b0960 | 2793 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), |
5f5c8ee5 GM |
2794 | unchanged_at_top, nlines, copy_from, retained_p); |
2795 | } | |
2796 | ||
2797 | ||
a13396c9 | 2798 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 2799 | the current frame matrix. */ |
a13396c9 GM |
2800 | |
2801 | static void | |
971de7fb | 2802 | sync_window_with_frame_matrix_rows (struct window *w) |
a13396c9 | 2803 | { |
d3d50620 | 2804 | struct frame *f = XFRAME (w->frame); |
a13396c9 | 2805 | struct glyph_row *window_row, *window_row_end, *frame_row; |
075c507b | 2806 | int left, right, x, width; |
a13396c9 | 2807 | |
5cb88111 | 2808 | /* Preconditions: W must be a leaf window on a tty frame. */ |
d3d50620 | 2809 | eassert (NILP (w->hchild) && NILP (w->vchild)); |
a54e2c05 | 2810 | eassert (!FRAME_WINDOW_P (f)); |
a13396c9 | 2811 | |
d3d50620 DA |
2812 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
2813 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
2814 | x = w->current_matrix->matrix_x; |
2815 | width = w->current_matrix->matrix_w; | |
2816 | ||
a13396c9 GM |
2817 | window_row = w->current_matrix->rows; |
2818 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 2819 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 2820 | |
5cb88111 | 2821 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 2822 | { |
5cb88111 GM |
2823 | window_row->glyphs[LEFT_MARGIN_AREA] |
2824 | = frame_row->glyphs[0] + x; | |
2825 | window_row->glyphs[TEXT_AREA] | |
2826 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
2827 | window_row->glyphs[LAST_AREA] | |
2828 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
2829 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
2830 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
2831 | } |
2832 | } | |
2833 | ||
2834 | ||
2835 | /* Return the window in the window tree rooted in W containing frame | |
2836 | row ROW. Value is null if none is found. */ | |
2837 | ||
09ad5a91 | 2838 | static struct window * |
971de7fb | 2839 | frame_row_to_window (struct window *w, int row) |
a13396c9 GM |
2840 | { |
2841 | struct window *found = NULL; | |
177c0ea7 | 2842 | |
a13396c9 GM |
2843 | while (w && !found) |
2844 | { | |
d3d50620 DA |
2845 | if (!NILP (w->hchild)) |
2846 | found = frame_row_to_window (XWINDOW (w->hchild), row); | |
2847 | else if (!NILP (w->vchild)) | |
2848 | found = frame_row_to_window (XWINDOW (w->vchild), row); | |
7df02016 KS |
2849 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
2850 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 2851 | found = w; |
177c0ea7 | 2852 | |
d3d50620 | 2853 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
a13396c9 GM |
2854 | } |
2855 | ||
2856 | return found; | |
2857 | } | |
2858 | ||
2859 | ||
5f5c8ee5 GM |
2860 | /* Perform a line dance in the window tree rooted at W, after |
2861 | scrolling a frame matrix in mirrored_line_dance. | |
2862 | ||
2863 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
2864 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
2865 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
2866 | I < NLINES, the index of the original line to move to I. This | |
2867 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
2868 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
2869 | which is empty. */ | |
2870 | ||
2871 | static void | |
971de7fb | 2872 | mirror_line_dance (struct window *w, int unchanged_at_top, int nlines, int *copy_from, char *retained_p) |
5f5c8ee5 GM |
2873 | { |
2874 | while (w) | |
2875 | { | |
d3d50620 DA |
2876 | if (!NILP (w->hchild)) |
2877 | mirror_line_dance (XWINDOW (w->hchild), unchanged_at_top, | |
5f5c8ee5 | 2878 | nlines, copy_from, retained_p); |
d3d50620 DA |
2879 | else if (!NILP (w->vchild)) |
2880 | mirror_line_dance (XWINDOW (w->vchild), unchanged_at_top, | |
5f5c8ee5 GM |
2881 | nlines, copy_from, retained_p); |
2882 | else | |
2883 | { | |
2884 | /* W is a leaf window, and we are working on its current | |
2885 | matrix m. */ | |
2886 | struct glyph_matrix *m = w->current_matrix; | |
59ea14cd PE |
2887 | int i; |
2888 | bool sync_p = 0; | |
5f5c8ee5 GM |
2889 | struct glyph_row *old_rows; |
2890 | ||
2891 | /* Make a copy of the original rows of matrix m. */ | |
38182d90 | 2892 | old_rows = alloca (m->nrows * sizeof *old_rows); |
72af86bd | 2893 | memcpy (old_rows, m->rows, m->nrows * sizeof *old_rows); |
5f5c8ee5 GM |
2894 | |
2895 | for (i = 0; i < nlines; ++i) | |
2896 | { | |
2897 | /* Frame relative line assigned to. */ | |
2898 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 2899 | |
5f5c8ee5 GM |
2900 | /* Frame relative line assigned. */ |
2901 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 2902 | |
5f5c8ee5 GM |
2903 | /* Window relative line assigned to. */ |
2904 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 2905 | |
5f5c8ee5 GM |
2906 | /* Window relative line assigned. */ |
2907 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 2908 | |
5f5c8ee5 | 2909 | /* Is assigned line inside window? */ |
59ea14cd | 2910 | bool from_inside_window_p |
5f5c8ee5 | 2911 | = window_from >= 0 && window_from < m->matrix_h; |
177c0ea7 | 2912 | |
a13396c9 | 2913 | /* Is assigned to line inside window? */ |
59ea14cd | 2914 | bool to_inside_window_p |
a13396c9 | 2915 | = window_to >= 0 && window_to < m->matrix_h; |
177c0ea7 | 2916 | |
a13396c9 | 2917 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 2918 | { |
5f5c8ee5 GM |
2919 | /* Do the assignment. The enabled_p flag is saved |
2920 | over the assignment because the old redisplay did | |
2921 | that. */ | |
59ea14cd | 2922 | bool enabled_before_p = m->rows[window_to].enabled_p; |
5f5c8ee5 GM |
2923 | m->rows[window_to] = old_rows[window_from]; |
2924 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 2925 | |
5f5c8ee5 GM |
2926 | /* If frame line is empty, window line is empty, too. */ |
2927 | if (!retained_p[copy_from[i]]) | |
2928 | m->rows[window_to].enabled_p = 0; | |
2929 | } | |
a13396c9 GM |
2930 | else if (to_inside_window_p) |
2931 | { | |
2932 | /* A copy between windows. This is an infrequent | |
2933 | case not worth optimizing. */ | |
d3d50620 | 2934 | struct frame *f = XFRAME (w->frame); |
a13396c9 GM |
2935 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
2936 | struct window *w2; | |
2937 | struct glyph_matrix *m2; | |
2938 | int m2_from; | |
2939 | ||
fe8b8401 | 2940 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
2941 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
2942 | -nw', FROM_FRAME sometimes has no associated window. | |
2943 | This check avoids a segfault if W2 is null. */ | |
2944 | if (w2) | |
2945 | { | |
2946 | m2 = w2->current_matrix; | |
2947 | m2_from = frame_from - m2->matrix_y; | |
2948 | copy_row_except_pointers (m->rows + window_to, | |
2949 | m2->rows + m2_from); | |
2950 | ||
2951 | /* If frame line is empty, window line is empty, too. */ | |
2952 | if (!retained_p[copy_from[i]]) | |
2953 | m->rows[window_to].enabled_p = 0; | |
2954 | } | |
a13396c9 GM |
2955 | sync_p = 1; |
2956 | } | |
2957 | else if (from_inside_window_p) | |
2958 | sync_p = 1; | |
5f5c8ee5 | 2959 | } |
a13396c9 GM |
2960 | |
2961 | /* If there was a copy between windows, make sure glyph | |
2962 | pointers are in sync with the frame matrix. */ | |
2963 | if (sync_p) | |
2964 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 2965 | |
5f5c8ee5 GM |
2966 | /* Check that no pointers are lost. */ |
2967 | CHECK_MATRIX (m); | |
2968 | } | |
2969 | ||
2970 | /* Next window on same level. */ | |
d3d50620 | 2971 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2972 | } |
2973 | } | |
2974 | ||
2975 | ||
e509cfa6 | 2976 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
2977 | |
2978 | /* Check that window and frame matrices agree about their | |
2979 | understanding where glyphs of the rows are to find. For each | |
2980 | window in the window tree rooted at W, check that rows in the | |
2981 | matrices of leaf window agree with their frame matrices about | |
2982 | glyph pointers. */ | |
2983 | ||
85fece3e | 2984 | static void |
59fc5cf9 | 2985 | check_window_matrix_pointers (struct window *w) |
5f5c8ee5 GM |
2986 | { |
2987 | while (w) | |
2988 | { | |
d3d50620 DA |
2989 | if (!NILP (w->hchild)) |
2990 | check_window_matrix_pointers (XWINDOW (w->hchild)); | |
2991 | else if (!NILP (w->vchild)) | |
2992 | check_window_matrix_pointers (XWINDOW (w->vchild)); | |
5f5c8ee5 | 2993 | else |
60a8948a | 2994 | { |
d3d50620 | 2995 | struct frame *f = XFRAME (w->frame); |
5f5c8ee5 GM |
2996 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); |
2997 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 2998 | } |
177c0ea7 | 2999 | |
d3d50620 | 3000 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
3001 | } |
3002 | } | |
3003 | ||
3004 | ||
3005 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
3006 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
3007 | each row in WINDOW_MATRIX check that it's a slice of the | |
3008 | corresponding frame row. If it isn't, abort. */ | |
3009 | ||
3010 | static void | |
59fc5cf9 AS |
3011 | check_matrix_pointers (struct glyph_matrix *window_matrix, |
3012 | struct glyph_matrix *frame_matrix) | |
5f5c8ee5 GM |
3013 | { |
3014 | /* Row number in WINDOW_MATRIX. */ | |
3015 | int i = 0; | |
3016 | ||
3017 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
3018 | int j = window_matrix->matrix_y; | |
3019 | ||
177c0ea7 | 3020 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
3021 | slice of the row in the frame matrix. If it isn't we didn't |
3022 | mirror an operation on the frame matrix correctly. */ | |
3023 | while (i < window_matrix->nrows) | |
3024 | { | |
3025 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
3026 | frame_matrix->rows + j)) | |
1088b922 | 3027 | emacs_abort (); |
5f5c8ee5 GM |
3028 | ++i, ++j; |
3029 | } | |
3030 | } | |
3031 | ||
e509cfa6 | 3032 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
3033 | |
3034 | ||
3035 | \f | |
3036 | /********************************************************************** | |
3037 | VPOS and HPOS translations | |
3038 | **********************************************************************/ | |
3039 | ||
e509cfa6 | 3040 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
3041 | |
3042 | /* Translate vertical position VPOS which is relative to window W to a | |
3043 | vertical position relative to W's frame. */ | |
3044 | ||
3045 | static int | |
59fc5cf9 | 3046 | window_to_frame_vpos (struct window *w, int vpos) |
5f5c8ee5 | 3047 | { |
d3d50620 | 3048 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
a54e2c05 | 3049 | eassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); |
7df02016 | 3050 | vpos += WINDOW_TOP_EDGE_LINE (w); |
d3d50620 | 3051 | eassert (vpos >= 0 && vpos <= FRAME_LINES (XFRAME (w->frame))); |
5f5c8ee5 GM |
3052 | return vpos; |
3053 | } | |
3054 | ||
3055 | ||
3056 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 3057 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
3058 | |
3059 | static int | |
59fc5cf9 | 3060 | window_to_frame_hpos (struct window *w, int hpos) |
5f5c8ee5 | 3061 | { |
d3d50620 | 3062 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 3063 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
3064 | return hpos; |
3065 | } | |
177c0ea7 | 3066 | |
5f5c8ee5 GM |
3067 | #endif /* GLYPH_DEBUG */ |
3068 | ||
3069 | ||
3070 | \f | |
3071 | /********************************************************************** | |
3072 | Redrawing Frames | |
3073 | **********************************************************************/ | |
3074 | ||
a7ca3326 | 3075 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
7ee72033 | 3076 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. */) |
5842a27b | 3077 | (Lisp_Object frame) |
5f5c8ee5 GM |
3078 | { |
3079 | struct frame *f; | |
3080 | ||
b7826503 | 3081 | CHECK_LIVE_FRAME (frame); |
5f5c8ee5 GM |
3082 | f = XFRAME (frame); |
3083 | ||
3084 | /* Ignore redraw requests, if frame has no glyphs yet. | |
3085 | (Implementation note: It still has to be checked why we are | |
3086 | called so early here). */ | |
3087 | if (!glyphs_initialized_initially_p) | |
3088 | return Qnil; | |
3089 | ||
3090 | update_begin (f); | |
3224dac1 | 3091 | #ifdef MSDOS |
f2adda5e | 3092 | if (FRAME_MSDOS_P (f)) |
79d39b69 | 3093 | FRAME_TERMINAL (f)->set_terminal_modes_hook (FRAME_TERMINAL (f)); |
3224dac1 | 3094 | #endif |
385ed61f | 3095 | clear_frame (f); |
5f5c8ee5 GM |
3096 | clear_current_matrices (f); |
3097 | update_end (f); | |
daf01701 | 3098 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3099 | fflush (FRAME_TTY (f)->output); |
5f5c8ee5 GM |
3100 | windows_or_buffers_changed++; |
3101 | /* Mark all windows as inaccurate, so that every window will have | |
3102 | its redisplay done. */ | |
3103 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
3104 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
3105 | f->garbaged = 0; | |
3106 | return Qnil; | |
3107 | } | |
3108 | ||
3109 | ||
3110 | /* Redraw frame F. This is nothing more than a call to the Lisp | |
3111 | function redraw-frame. */ | |
3112 | ||
3113 | void | |
971de7fb | 3114 | redraw_frame (struct frame *f) |
5f5c8ee5 GM |
3115 | { |
3116 | Lisp_Object frame; | |
3117 | XSETFRAME (frame, f); | |
3118 | Fredraw_frame (frame); | |
3119 | } | |
3120 | ||
3121 | ||
3122 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
7ee72033 | 3123 | doc: /* Clear and redisplay all visible frames. */) |
5842a27b | 3124 | (void) |
5f5c8ee5 GM |
3125 | { |
3126 | Lisp_Object tail, frame; | |
3127 | ||
3128 | FOR_EACH_FRAME (tail, frame) | |
3129 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
3130 | Fredraw_frame (frame); | |
3131 | ||
3132 | return Qnil; | |
3133 | } | |
3134 | ||
3135 | ||
5f5c8ee5 | 3136 | \f |
5f5c8ee5 GM |
3137 | /*********************************************************************** |
3138 | Frame Update | |
3139 | ***********************************************************************/ | |
4588ec20 | 3140 | |
5f5c8ee5 | 3141 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 3142 | |
59ea14cd PE |
3143 | If FORCE_P, don't let redisplay be stopped by detecting pending input. |
3144 | If INHIBIT_HAIRY_ID_P, don't try scrolling. | |
177c0ea7 | 3145 | |
59ea14cd | 3146 | Value is true if redisplay was stopped due to pending input. */ |
4588ec20 | 3147 | |
59ea14cd PE |
3148 | bool |
3149 | update_frame (struct frame *f, bool force_p, bool inhibit_hairy_id_p) | |
5f5c8ee5 | 3150 | { |
59ea14cd PE |
3151 | /* True means display has been paused because of pending input. */ |
3152 | bool paused_p; | |
e69b0960 | 3153 | struct window *root_window = XWINDOW (f->root_window); |
5f5c8ee5 | 3154 | |
a2130dbb KS |
3155 | if (redisplay_dont_pause) |
3156 | force_p = 1; | |
a2130dbb KS |
3157 | else if (NILP (Vredisplay_preemption_period)) |
3158 | force_p = 1; | |
3159 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b | 3160 | { |
d012c62b | 3161 | double p = XFLOATINT (Vredisplay_preemption_period); |
d012c62b | 3162 | |
993d4ab6 KS |
3163 | if (detect_input_pending_ignore_squeezables ()) |
3164 | { | |
3165 | paused_p = 1; | |
3166 | goto do_pause; | |
3167 | } | |
3168 | ||
d35af63c | 3169 | preemption_period = EMACS_TIME_FROM_DOUBLE (p); |
e9a9ae03 PE |
3170 | preemption_next_check = add_emacs_time (current_emacs_time (), |
3171 | preemption_period); | |
d012c62b | 3172 | } |
d012c62b | 3173 | |
5f5c8ee5 | 3174 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3175 | { |
5f5c8ee5 GM |
3176 | /* We are working on window matrix basis. All windows whose |
3177 | flag must_be_updated_p is set have to be updated. */ | |
3178 | ||
3179 | /* Record that we are not working on frame matrices. */ | |
3180 | set_frame_matrix_frame (NULL); | |
3181 | ||
3182 | /* Update all windows in the window tree of F, maybe stopping | |
3183 | when pending input is detected. */ | |
3184 | update_begin (f); | |
3185 | ||
3186 | /* Update the menu bar on X frames that don't have toolkit | |
3187 | support. */ | |
e69b0960 DA |
3188 | if (WINDOWP (f->menu_bar_window)) |
3189 | update_window (XWINDOW (f->menu_bar_window), 1); | |
5f5c8ee5 GM |
3190 | |
3191 | /* Update the tool-bar window, if present. */ | |
e69b0960 | 3192 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3193 | { |
e69b0960 | 3194 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3195 | |
3196 | /* Update tool-bar window. */ | |
3197 | if (w->must_be_updated_p) | |
4588ec20 | 3198 | { |
153a073c PJ |
3199 | Lisp_Object tem; |
3200 | ||
5f5c8ee5 GM |
3201 | update_window (w, 1); |
3202 | w->must_be_updated_p = 0; | |
3203 | ||
3204 | /* Swap tool-bar strings. We swap because we want to | |
3205 | reuse strings. */ | |
e69b0960 | 3206 | tem = f->current_tool_bar_string; |
f00af5b1 PE |
3207 | fset_current_tool_bar_string (f, f->desired_tool_bar_string); |
3208 | fset_desired_tool_bar_string (f, tem); | |
4588ec20 JB |
3209 | } |
3210 | } | |
177c0ea7 | 3211 | |
5f5c8ee5 GM |
3212 | |
3213 | /* Update windows. */ | |
3214 | paused_p = update_window_tree (root_window, force_p); | |
3215 | update_end (f); | |
177c0ea7 | 3216 | |
6b61353c | 3217 | /* This flush is a performance bottleneck under X, |
e581a466 | 3218 | and it doesn't seem to be necessary anyway (in general). |
6b61353c | 3219 | It is necessary when resizing the window with the mouse, or |
e581a466 | 3220 | at least the fringes are not redrawn in a timely manner. ++kfs */ |
6b61353c | 3221 | if (f->force_flush_display_p) |
e581a466 KL |
3222 | { |
3223 | FRAME_RIF (f)->flush_display (f); | |
3224 | f->force_flush_display_p = 0; | |
3225 | } | |
4588ec20 | 3226 | } |
5f5c8ee5 GM |
3227 | else |
3228 | { | |
3229 | /* We are working on frame matrix basis. Set the frame on whose | |
3230 | frame matrix we operate. */ | |
3231 | set_frame_matrix_frame (f); | |
3232 | ||
868dd24b | 3233 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3234 | build_frame_matrix (f); |
177c0ea7 | 3235 | |
868dd24b GM |
3236 | /* Update the display */ |
3237 | update_begin (f); | |
5f5c8ee5 | 3238 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3239 | update_end (f); |
3240 | ||
7d2f1216 | 3241 | if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f)) |
3224dac1 | 3242 | { |
0b0d3e0b KL |
3243 | if (FRAME_TTY (f)->termscript) |
3244 | fflush (FRAME_TTY (f)->termscript); | |
7d2f1216 EZ |
3245 | if (FRAME_TERMCAP_P (f)) |
3246 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3247 | } |
868dd24b | 3248 | |
5f5c8ee5 | 3249 | /* Check window matrices for lost pointers. */ |
e509cfa6 | 3250 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
3251 | check_window_matrix_pointers (root_window); |
3252 | add_frame_display_history (f, paused_p); | |
3253 | #endif | |
5f5c8ee5 GM |
3254 | } |
3255 | ||
993d4ab6 | 3256 | do_pause: |
5f5c8ee5 GM |
3257 | /* Reset flags indicating that a window should be updated. */ |
3258 | set_window_update_flags (root_window, 0); | |
177c0ea7 | 3259 | |
868dd24b | 3260 | display_completed = !paused_p; |
5f5c8ee5 | 3261 | return paused_p; |
4588ec20 | 3262 | } |
5f5c8ee5 GM |
3263 | |
3264 | ||
4588ec20 | 3265 | \f |
5f5c8ee5 GM |
3266 | /************************************************************************ |
3267 | Window-based updates | |
3268 | ************************************************************************/ | |
3269 | ||
59ea14cd PE |
3270 | /* Perform updates in window tree rooted at W. |
3271 | If FORCE_P, don't stop updating if input is pending. */ | |
5f5c8ee5 | 3272 | |
59ea14cd PE |
3273 | static bool |
3274 | update_window_tree (struct window *w, bool force_p) | |
5f5c8ee5 | 3275 | { |
59ea14cd | 3276 | bool paused_p = 0; |
177c0ea7 | 3277 | |
5f5c8ee5 GM |
3278 | while (w && !paused_p) |
3279 | { | |
d3d50620 DA |
3280 | if (!NILP (w->hchild)) |
3281 | paused_p |= update_window_tree (XWINDOW (w->hchild), force_p); | |
3282 | else if (!NILP (w->vchild)) | |
3283 | paused_p |= update_window_tree (XWINDOW (w->vchild), force_p); | |
5f5c8ee5 GM |
3284 | else if (w->must_be_updated_p) |
3285 | paused_p |= update_window (w, force_p); | |
3286 | ||
d3d50620 | 3287 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
3288 | } |
3289 | ||
3290 | return paused_p; | |
3291 | } | |
3292 | ||
3293 | ||
59ea14cd PE |
3294 | /* Update window W if its flag must_be_updated_p is set. |
3295 | If FORCE_P, don't stop updating if input is pending. */ | |
5f5c8ee5 GM |
3296 | |
3297 | void | |
59ea14cd | 3298 | update_single_window (struct window *w, bool force_p) |
5f5c8ee5 GM |
3299 | { |
3300 | if (w->must_be_updated_p) | |
3301 | { | |
3302 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
3303 | ||
3304 | /* Record that this is not a frame-based redisplay. */ | |
3305 | set_frame_matrix_frame (NULL); | |
3306 | ||
a2130dbb KS |
3307 | if (redisplay_dont_pause) |
3308 | force_p = 1; | |
a2130dbb KS |
3309 | else if (NILP (Vredisplay_preemption_period)) |
3310 | force_p = 1; | |
3311 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b | 3312 | { |
d012c62b | 3313 | double p = XFLOATINT (Vredisplay_preemption_period); |
d35af63c | 3314 | preemption_period = EMACS_TIME_FROM_DOUBLE (p); |
e9a9ae03 PE |
3315 | preemption_next_check = add_emacs_time (current_emacs_time (), |
3316 | preemption_period); | |
d012c62b | 3317 | } |
d012c62b | 3318 | |
5f5c8ee5 GM |
3319 | /* Update W. */ |
3320 | update_begin (f); | |
3321 | update_window (w, force_p); | |
3322 | update_end (f); | |
4588ec20 | 3323 | |
5f5c8ee5 GM |
3324 | /* Reset flag in W. */ |
3325 | w->must_be_updated_p = 0; | |
3326 | } | |
3327 | } | |
4588ec20 | 3328 | |
93e023fc | 3329 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 3330 | |
408f5064 GM |
3331 | /* Redraw lines from the current matrix of window W that are |
3332 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
3333 | ||
3334 | static void | |
971de7fb | 3335 | redraw_overlapped_rows (struct window *w, int yb) |
408f5064 | 3336 | { |
d8ee7803 | 3337 | int i; |
fa971ac3 | 3338 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3fc809e2 | 3339 | |
408f5064 GM |
3340 | /* If rows overlapping others have been changed, the rows being |
3341 | overlapped have to be redrawn. This won't draw lines that have | |
3342 | already been drawn in update_window_line because overlapped_p in | |
3343 | desired rows is 0, so after row assignment overlapped_p in | |
3344 | current rows is 0. */ | |
3345 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
3346 | { | |
e876ff42 | 3347 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
3348 | |
3349 | if (!row->enabled_p) | |
3350 | break; | |
3351 | else if (row->mode_line_p) | |
3352 | continue; | |
177c0ea7 | 3353 | |
408f5064 GM |
3354 | if (row->overlapped_p) |
3355 | { | |
3356 | enum glyph_row_area area; | |
177c0ea7 | 3357 | |
408f5064 GM |
3358 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
3359 | { | |
3360 | updated_row = row; | |
3361 | updated_area = area; | |
fa971ac3 KL |
3362 | FRAME_RIF (f)->cursor_to (i, 0, row->y, |
3363 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 3364 | if (row->used[area]) |
fa971ac3 KL |
3365 | FRAME_RIF (f)->write_glyphs (row->glyphs[area], |
3366 | row->used[area]); | |
3367 | FRAME_RIF (f)->clear_end_of_line (-1); | |
408f5064 | 3368 | } |
177c0ea7 | 3369 | |
408f5064 GM |
3370 | row->overlapped_p = 0; |
3371 | } | |
3372 | ||
e876ff42 | 3373 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
3374 | break; |
3375 | } | |
3376 | } | |
3377 | ||
3378 | ||
3379 | /* Redraw lines from the current matrix of window W that overlap | |
3380 | others. YB is bottom-most y-position in W. */ | |
3381 | ||
3382 | static void | |
971de7fb | 3383 | redraw_overlapping_rows (struct window *w, int yb) |
408f5064 GM |
3384 | { |
3385 | int i, bottom_y; | |
3386 | struct glyph_row *row; | |
fa971ac3 | 3387 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
3fc809e2 | 3388 | |
408f5064 GM |
3389 | for (i = 0; i < w->current_matrix->nrows; ++i) |
3390 | { | |
3391 | row = w->current_matrix->rows + i; | |
3392 | ||
3393 | if (!row->enabled_p) | |
3394 | break; | |
3395 | else if (row->mode_line_p) | |
3396 | continue; | |
177c0ea7 | 3397 | |
408f5064 GM |
3398 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
3399 | ||
b4b2c2ca | 3400 | if (row->overlapping_p) |
408f5064 | 3401 | { |
41124e06 YM |
3402 | int overlaps = 0; |
3403 | ||
b4b2c2ca | 3404 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) && i > 0 |
41124e06 YM |
3405 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) |
3406 | overlaps |= OVERLAPS_PRED; | |
b4b2c2ca | 3407 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) && bottom_y < yb |
41124e06 YM |
3408 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) |
3409 | overlaps |= OVERLAPS_SUCC; | |
3410 | ||
3411 | if (overlaps) | |
3412 | { | |
3413 | if (row->used[LEFT_MARGIN_AREA]) | |
3414 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
3415 | ||
3416 | if (row->used[TEXT_AREA]) | |
3417 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
3418 | ||
3419 | if (row->used[RIGHT_MARGIN_AREA]) | |
3420 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
3421 | ||
c5e87d10 | 3422 | /* Record in neighbor rows that ROW overwrites part of |
41124e06 YM |
3423 | their display. */ |
3424 | if (overlaps & OVERLAPS_PRED) | |
3425 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
3426 | if (overlaps & OVERLAPS_SUCC) | |
3427 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
3428 | } | |
408f5064 GM |
3429 | } |
3430 | ||
3431 | if (bottom_y >= yb) | |
3432 | break; | |
3433 | } | |
3434 | } | |
3435 | ||
93e023fc KS |
3436 | #endif /* HAVE_WINDOW_SYSTEM */ |
3437 | ||
408f5064 | 3438 | |
09ad5a91 | 3439 | #if defined GLYPH_DEBUG && 0 |
93962bfa GM |
3440 | |
3441 | /* Check that no row in the current matrix of window W is enabled | |
3442 | which is below what's displayed in the window. */ | |
3443 | ||
09ad5a91 | 3444 | static void |
971de7fb | 3445 | check_current_matrix_flags (struct window *w) |
93962bfa | 3446 | { |
59ea14cd | 3447 | bool last_seen_p = 0; |
93962bfa GM |
3448 | int i, yb = window_text_bottom_y (w); |
3449 | ||
3450 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
3451 | { | |
3452 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
3453 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3454 | last_seen_p = 1; | |
3455 | else if (last_seen_p && row->enabled_p) | |
1088b922 | 3456 | emacs_abort (); |
93962bfa GM |
3457 | } |
3458 | } | |
3459 | ||
3460 | #endif /* GLYPH_DEBUG */ | |
3461 | ||
3462 | ||
59ea14cd PE |
3463 | /* Update display of window W. |
3464 | If FORCE_P, don't stop updating when input is pending. */ | |
5f5c8ee5 | 3465 | |
59ea14cd PE |
3466 | static bool |
3467 | update_window (struct window *w, bool force_p) | |
4588ec20 | 3468 | { |
5f5c8ee5 | 3469 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
59ea14cd | 3470 | bool paused_p; |
d012c62b | 3471 | #if !PERIODIC_PREEMPTION_CHECKING |
5f5c8ee5 | 3472 | int preempt_count = baud_rate / 2400 + 1; |
d012c62b | 3473 | #endif |
597cfb3f | 3474 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
e509cfa6 | 3475 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 3476 | /* Check that W's frame doesn't have glyph matrices. */ |
a54e2c05 | 3477 | eassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 3478 | #endif |
5f5c8ee5 GM |
3479 | |
3480 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb KS |
3481 | #if !PERIODIC_PREEMPTION_CHECKING |
3482 | if (!force_p) | |
a2d5fca0 | 3483 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3484 | #endif |
4588ec20 | 3485 | |
5f5c8ee5 GM |
3486 | /* If forced to complete the update, or if no input is pending, do |
3487 | the update. */ | |
8fd9a666 | 3488 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 3489 | { |
5f5c8ee5 GM |
3490 | struct glyph_row *row, *end; |
3491 | struct glyph_row *mode_line_row; | |
56974e03 | 3492 | struct glyph_row *header_line_row; |
59ea14cd PE |
3493 | int yb; |
3494 | bool changed_p = 0, mouse_face_overwritten_p = 0; | |
0bc32927 PE |
3495 | #if ! PERIODIC_PREEMPTION_CHECKING |
3496 | int n_updated = 0; | |
3497 | #endif | |
5f5c8ee5 GM |
3498 | |
3499 | rif->update_window_begin_hook (w); | |
3500 | yb = window_text_bottom_y (w); | |
5f5c8ee5 GM |
3501 | row = desired_matrix->rows; |
3502 | end = row + desired_matrix->nrows - 1; | |
177c0ea7 | 3503 | |
394305db EZ |
3504 | /* Take note of the header line, if there is one. We will |
3505 | update it below, after updating all of the window's lines. */ | |
5f5c8ee5 | 3506 | if (row->mode_line_p) |
56974e03 GM |
3507 | { |
3508 | header_line_row = row; | |
3509 | ++row; | |
3510 | } | |
3511 | else | |
3512 | header_line_row = NULL; | |
5f5c8ee5 GM |
3513 | |
3514 | /* Update the mode line, if necessary. */ | |
3515 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
3516 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
3517 | { | |
3518 | mode_line_row->y = yb; | |
3519 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
3520 | desired_matrix), |
3521 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3522 | } |
3523 | ||
3524 | /* Find first enabled row. Optimizations in redisplay_internal | |
3525 | may lead to an update with only one row enabled. There may | |
3526 | be also completely empty matrices. */ | |
3527 | while (row < end && !row->enabled_p) | |
3528 | ++row; | |
177c0ea7 | 3529 | |
bfdcafe1 | 3530 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 3531 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
3532 | { |
3533 | int rc = scrolling_window (w, header_line_row != NULL); | |
3534 | if (rc < 0) | |
3535 | { | |
3536 | /* All rows were found to be equal. */ | |
3537 | paused_p = 0; | |
3538 | goto set_cursor; | |
3539 | } | |
3540 | else if (rc > 0) | |
6b61353c KH |
3541 | { |
3542 | /* We've scrolled the display. */ | |
3543 | force_p = 1; | |
3544 | changed_p = 1; | |
3545 | } | |
5f5c8ee5 GM |
3546 | } |
3547 | ||
3548 | /* Update the rest of the lines. */ | |
0bc32927 | 3549 | for (; row < end && (force_p || !input_pending); ++row) |
394305db EZ |
3550 | /* scrolling_window resets the enabled_p flag of the rows it |
3551 | reuses from current_matrix. */ | |
b7412313 | 3552 | if (row->enabled_p) |
5f5c8ee5 GM |
3553 | { |
3554 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
3555 | int i; | |
177c0ea7 | 3556 | |
153a073c | 3557 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
3558 | detect_input_pending. If it's done too often, |
3559 | scrolling large windows with repeated scroll-up | |
3560 | commands will too quickly pause redisplay. */ | |
d012c62b KS |
3561 | #if PERIODIC_PREEMPTION_CHECKING |
3562 | if (!force_p) | |
3563 | { | |
e9a9ae03 | 3564 | EMACS_TIME tm = current_emacs_time (); |
d35af63c | 3565 | if (EMACS_TIME_LT (preemption_next_check, tm)) |
d012c62b | 3566 | { |
e9a9ae03 PE |
3567 | preemption_next_check = add_emacs_time (tm, |
3568 | preemption_period); | |
993d4ab6 KS |
3569 | if (detect_input_pending_ignore_squeezables ()) |
3570 | break; | |
d012c62b KS |
3571 | } |
3572 | } | |
3573 | #else | |
e87b8809 | 3574 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 3575 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3576 | #endif |
e876ff42 GM |
3577 | changed_p |= update_window_line (w, vpos, |
3578 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3579 | |
3580 | /* Mark all rows below the last visible one in the current | |
3581 | matrix as invalid. This is necessary because of | |
3582 | variable line heights. Consider the case of three | |
3583 | successive redisplays, where the first displays 5 | |
3584 | lines, the second 3 lines, and the third 5 lines again. | |
3585 | If the second redisplay wouldn't mark rows in the | |
3586 | current matrix invalid, the third redisplay might be | |
3587 | tempted to optimize redisplay based on lines displayed | |
3588 | in the first redisplay. */ | |
3589 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3590 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
3591 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
3592 | } | |
3593 | ||
3594 | /* Was display preempted? */ | |
3595 | paused_p = row < end; | |
177c0ea7 | 3596 | |
56974e03 | 3597 | set_cursor: |
177c0ea7 | 3598 | |
6b61353c KH |
3599 | /* Update the header line after scrolling because a new header |
3600 | line would otherwise overwrite lines at the top of the window | |
3601 | that can be scrolled. */ | |
3602 | if (header_line_row && header_line_row->enabled_p) | |
3603 | { | |
3604 | header_line_row->y = 0; | |
3605 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
6b61353c KH |
3606 | } |
3607 | ||
153a073c | 3608 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
3609 | if (!paused_p && !w->pseudo_window_p) |
3610 | { | |
93e023fc | 3611 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
3612 | if (changed_p && rif->fix_overlapping_area) |
3613 | { | |
3614 | redraw_overlapped_rows (w, yb); | |
3615 | redraw_overlapping_rows (w, yb); | |
3616 | } | |
93e023fc | 3617 | #endif |
177c0ea7 | 3618 | |
5f5c8ee5 GM |
3619 | /* Make cursor visible at cursor position of W. */ |
3620 | set_window_cursor_after_update (w); | |
3621 | ||
e876ff42 GM |
3622 | #if 0 /* Check that current matrix invariants are satisfied. This is |
3623 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
3624 | IF_DEBUG (check_matrix_invariants (w)); |
3625 | #endif | |
4588ec20 | 3626 | } |
5f5c8ee5 | 3627 | |
e509cfa6 | 3628 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
3629 | /* Remember the redisplay method used to display the matrix. */ |
3630 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
3631 | #endif | |
408f5064 | 3632 | |
6b61353c KH |
3633 | #ifdef HAVE_WINDOW_SYSTEM |
3634 | update_window_fringes (w, 0); | |
3635 | #endif | |
3636 | ||
56974e03 GM |
3637 | /* End the update of window W. Don't set the cursor if we |
3638 | paused updating the display because in this case, | |
3639 | set_window_cursor_after_update hasn't been called, and | |
3640 | output_cursor doesn't contain the cursor location. */ | |
3641 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); | |
4588ec20 | 3642 | } |
5f5c8ee5 GM |
3643 | else |
3644 | paused_p = 1; | |
3645 | ||
e509cfa6 | 3646 | #ifdef GLYPH_DEBUG |
0cffd9d8 | 3647 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
3648 | add_window_display_history (w, w->current_matrix->method, paused_p); |
3649 | #endif | |
177c0ea7 | 3650 | |
5f5c8ee5 | 3651 | clear_glyph_matrix (desired_matrix); |
408f5064 | 3652 | |
5f5c8ee5 | 3653 | return paused_p; |
4588ec20 JB |
3654 | } |
3655 | ||
b64b3980 | 3656 | |
5f5c8ee5 GM |
3657 | /* Update the display of area AREA in window W, row number VPOS. |
3658 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
3659 | ||
3660 | static void | |
971de7fb | 3661 | update_marginal_area (struct window *w, int area, int vpos) |
b64b3980 | 3662 | { |
5f5c8ee5 | 3663 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 3664 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
3665 | |
3666 | /* Let functions in xterm.c know what area subsequent X positions | |
3667 | will be relative to. */ | |
3668 | updated_area = area; | |
3669 | ||
3670 | /* Set cursor to start of glyphs, write them, and clear to the end | |
3671 | of the area. I don't think that something more sophisticated is | |
3672 | necessary here, since marginal areas will not be the default. */ | |
3673 | rif->cursor_to (vpos, 0, desired_row->y, 0); | |
3674 | if (desired_row->used[area]) | |
3675 | rif->write_glyphs (desired_row->glyphs[area], desired_row->used[area]); | |
3676 | rif->clear_end_of_line (-1); | |
b64b3980 | 3677 | } |
23b0200c | 3678 | |
352f1545 | 3679 | |
408f5064 | 3680 | /* Update the display of the text area of row VPOS in window W. |
59ea14cd | 3681 | Value is true if display has changed. */ |
5f5c8ee5 | 3682 | |
59ea14cd | 3683 | static bool |
971de7fb | 3684 | update_text_area (struct window *w, int vpos) |
23b0200c | 3685 | { |
5f5c8ee5 GM |
3686 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
3687 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3688 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
59ea14cd | 3689 | bool changed_p = 0; |
5f5c8ee5 GM |
3690 | |
3691 | /* Let functions in xterm.c know what area subsequent X positions | |
3692 | will be relative to. */ | |
3693 | updated_area = TEXT_AREA; | |
177c0ea7 | 3694 | |
5f5c8ee5 GM |
3695 | /* If rows are at different X or Y, or rows have different height, |
3696 | or the current row is marked invalid, write the entire line. */ | |
3697 | if (!current_row->enabled_p | |
3698 | || desired_row->y != current_row->y | |
3699 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
3700 | || desired_row->phys_ascent != current_row->phys_ascent |
3701 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 3702 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 3703 | || current_row->overlapped_p |
fee8b690 CY |
3704 | /* This next line is necessary for correctly redrawing |
3705 | mouse-face areas after scrolling and other operations. | |
3706 | However, it causes excessive flickering when mouse is moved | |
3707 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
3708 | line doesn't seem to hurt anything. -- cyd. |
3709 | But it is still needed for the header line. -- kfs. */ | |
3710 | || (current_row->mouse_face_p | |
3711 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
3712 | || current_row->x != desired_row->x) |
3713 | { | |
3714 | rif->cursor_to (vpos, 0, desired_row->y, desired_row->x); | |
177c0ea7 | 3715 | |
5f5c8ee5 GM |
3716 | if (desired_row->used[TEXT_AREA]) |
3717 | rif->write_glyphs (desired_row->glyphs[TEXT_AREA], | |
3718 | desired_row->used[TEXT_AREA]); | |
177c0ea7 | 3719 | |
5f5c8ee5 GM |
3720 | /* Clear to end of window. */ |
3721 | rif->clear_end_of_line (-1); | |
408f5064 | 3722 | changed_p = 1; |
60f2f3f1 GM |
3723 | |
3724 | /* This erases the cursor. We do this here because | |
3725 | notice_overwritten_cursor cannot easily check this, which | |
3726 | might indicate that the whole functionality of | |
3727 | notice_overwritten_cursor would better be implemented here. | |
3728 | On the other hand, we need notice_overwritten_cursor as long | |
3729 | as mouse highlighting is done asynchronously outside of | |
3730 | redisplay. */ | |
3731 | if (vpos == w->phys_cursor.vpos) | |
3732 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
3733 | } |
3734 | else | |
3735 | { | |
3736 | int stop, i, x; | |
3737 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
3738 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
59ea14cd | 3739 | bool overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 3740 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
59ea14cd | 3741 | bool abort_skipping = 0; |
5f5c8ee5 | 3742 | |
78897758 YM |
3743 | /* If the desired row extends its face to the text area end, and |
3744 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
3745 | make sure we write at least one glyph, so that the face |
3746 | extension actually takes place. */ | |
78897758 YM |
3747 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
3748 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
3749 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
3750 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 3751 | --desired_stop_pos; |
177c0ea7 | 3752 | |
5f5c8ee5 GM |
3753 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
3754 | i = 0; | |
3755 | x = desired_row->x; | |
8399f8a0 GM |
3756 | |
3757 | /* Loop over glyphs that current and desired row may have | |
3758 | in common. */ | |
5f5c8ee5 | 3759 | while (i < stop) |
352f1545 | 3760 | { |
59ea14cd | 3761 | bool can_skip_p = !abort_skipping; |
177c0ea7 | 3762 | |
5f5c8ee5 | 3763 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
3764 | don't have to be written. We can't skip if the last |
3765 | current glyph overlaps the glyph to its right. For | |
3766 | example, consider a current row of `if ' with the `f' in | |
3767 | Courier bold so that it overlaps the ` ' to its right. | |
3768 | If the desired row is ` ', we would skip over the space | |
3769 | after the `if' and there would remain a pixel from the | |
3770 | `f' on the screen. */ | |
3771 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 3772 | { |
e47306e6 GM |
3773 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
3774 | int left, right; | |
177c0ea7 | 3775 | |
d3d50620 | 3776 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
e47306e6 | 3777 | &left, &right); |
91d227d9 | 3778 | can_skip_p = (right == 0 && !abort_skipping); |
352f1545 | 3779 | } |
177c0ea7 | 3780 | |
6d950f4c | 3781 | if (can_skip_p) |
352f1545 | 3782 | { |
91d227d9 CY |
3783 | int start_hpos = i; |
3784 | ||
6d950f4c GM |
3785 | while (i < stop |
3786 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
3787 | { | |
3788 | x += desired_glyph->pixel_width; | |
3789 | ++desired_glyph, ++current_glyph, ++i; | |
3790 | } | |
3791 | ||
3792 | /* Consider the case that the current row contains "xxx | |
3793 | ppp ggg" in italic Courier font, and the desired row | |
3794 | is "xxx ggg". The character `p' has lbearing, `g' | |
3795 | has not. The loop above will stop in front of the | |
3796 | first `p' in the current row. If we would start | |
3797 | writing glyphs there, we wouldn't erase the lbearing | |
3798 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 3799 | taken care of by draw_glyphs. */ |
6d950f4c GM |
3800 | if (overlapping_glyphs_p |
3801 | && i > 0 | |
3802 | && i < current_row->used[TEXT_AREA] | |
3803 | && (current_row->used[TEXT_AREA] | |
3804 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 3805 | { |
6d950f4c | 3806 | int left, right; |
177c0ea7 | 3807 | |
3a45383a | 3808 | rif->get_glyph_overhangs (current_glyph, |
d3d50620 | 3809 | XFRAME (w->frame), |
6d950f4c GM |
3810 | &left, &right); |
3811 | while (left > 0 && i > 0) | |
3812 | { | |
3813 | --i, --desired_glyph, --current_glyph; | |
3814 | x -= desired_glyph->pixel_width; | |
3815 | left -= desired_glyph->pixel_width; | |
3816 | } | |
91d227d9 CY |
3817 | |
3818 | /* Abort the skipping algorithm if we end up before | |
3819 | our starting point, to avoid looping (bug#1070). | |
3820 | This can happen when the lbearing is larger than | |
3821 | the pixel width. */ | |
3822 | abort_skipping = (i < start_hpos); | |
5f5c8ee5 | 3823 | } |
352f1545 | 3824 | } |
177c0ea7 | 3825 | |
5f5c8ee5 GM |
3826 | /* Try to avoid writing the entire rest of the desired row |
3827 | by looking for a resync point. This mainly prevents | |
3828 | mode line flickering in the case the mode line is in | |
3829 | fixed-pitch font, which it usually will be. */ | |
3830 | if (i < desired_row->used[TEXT_AREA]) | |
3831 | { | |
3832 | int start_x = x, start_hpos = i; | |
3833 | struct glyph *start = desired_glyph; | |
3834 | int current_x = x; | |
59ea14cd | 3835 | bool skip_first_p = !can_skip_p; |
6d950f4c | 3836 | |
5f5c8ee5 GM |
3837 | /* Find the next glyph that's equal again. */ |
3838 | while (i < stop | |
6d950f4c GM |
3839 | && (skip_first_p |
3840 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
3841 | && x == current_x) |
3842 | { | |
3843 | x += desired_glyph->pixel_width; | |
3844 | current_x += current_glyph->pixel_width; | |
3845 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 3846 | skip_first_p = 0; |
5f5c8ee5 | 3847 | } |
23b0200c | 3848 | |
5f5c8ee5 GM |
3849 | if (i == start_hpos || x != current_x) |
3850 | { | |
3851 | i = start_hpos; | |
3852 | x = start_x; | |
3853 | desired_glyph = start; | |
3854 | break; | |
3855 | } | |
e47306e6 | 3856 | |
5f5c8ee5 GM |
3857 | rif->cursor_to (vpos, start_hpos, desired_row->y, start_x); |
3858 | rif->write_glyphs (start, i - start_hpos); | |
408f5064 | 3859 | changed_p = 1; |
5f5c8ee5 GM |
3860 | } |
3861 | } | |
177c0ea7 | 3862 | |
5f5c8ee5 GM |
3863 | /* Write the rest. */ |
3864 | if (i < desired_row->used[TEXT_AREA]) | |
3865 | { | |
3866 | rif->cursor_to (vpos, i, desired_row->y, x); | |
3867 | rif->write_glyphs (desired_glyph, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 3868 | changed_p = 1; |
5f5c8ee5 | 3869 | } |
177c0ea7 | 3870 | |
5f5c8ee5 GM |
3871 | /* Maybe clear to end of line. */ |
3872 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
3873 | { | |
3874 | /* If new row extends to the end of the text area, nothing | |
3875 | has to be cleared, if and only if we did a write_glyphs | |
3876 | above. This is made sure by setting desired_stop_pos | |
3877 | appropriately above. */ | |
a54e2c05 | 3878 | eassert (i < desired_row->used[TEXT_AREA] |
78897758 YM |
3879 | || ((desired_row->used[TEXT_AREA] |
3880 | == current_row->used[TEXT_AREA]) | |
3881 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
3882 | } |
3883 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
3884 | { | |
3885 | /* If old row extends to the end of the text area, clear. */ | |
3886 | if (i >= desired_row->used[TEXT_AREA]) | |
3887 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3888 | desired_row->pixel_width); |
5f5c8ee5 | 3889 | rif->clear_end_of_line (-1); |
408f5064 | 3890 | changed_p = 1; |
5f5c8ee5 GM |
3891 | } |
3892 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 3893 | { |
5f5c8ee5 GM |
3894 | /* Otherwise clear to the end of the old row. Everything |
3895 | after that position should be clear already. */ | |
27786b2f | 3896 | int xlim; |
177c0ea7 | 3897 | |
5f5c8ee5 GM |
3898 | if (i >= desired_row->used[TEXT_AREA]) |
3899 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3900 | desired_row->pixel_width); |
5f5c8ee5 GM |
3901 | |
3902 | /* If cursor is displayed at the end of the line, make sure | |
3903 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
3904 | with which to erase the cursor (because this method | |
3905 | doesn't work with lbearing/rbearing), so we must do it | |
3906 | this way. */ | |
3907 | if (vpos == w->phys_cursor.vpos | |
f951a506 EZ |
3908 | && (desired_row->reversed_p |
3909 | ? (w->phys_cursor.hpos < 0) | |
3910 | : (w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]))) | |
5f5c8ee5 GM |
3911 | { |
3912 | w->phys_cursor_on_p = 0; | |
27786b2f | 3913 | xlim = -1; |
5f5c8ee5 GM |
3914 | } |
3915 | else | |
27786b2f PE |
3916 | xlim = current_row->pixel_width; |
3917 | rif->clear_end_of_line (xlim); | |
408f5064 | 3918 | changed_p = 1; |
2e8907d3 | 3919 | } |
23b0200c | 3920 | } |
408f5064 GM |
3921 | |
3922 | return changed_p; | |
23b0200c | 3923 | } |
4588ec20 | 3924 | |
5f5c8ee5 | 3925 | |
59ea14cd | 3926 | /* Update row VPOS in window W. Value is true if display has been changed. */ |
5f5c8ee5 | 3927 | |
59ea14cd PE |
3928 | static bool |
3929 | update_window_line (struct window *w, int vpos, bool *mouse_face_overwritten_p) | |
5f5c8ee5 GM |
3930 | { |
3931 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
3932 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3933 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
59ea14cd | 3934 | bool changed_p = 0; |
5f5c8ee5 | 3935 | |
5f5c8ee5 GM |
3936 | /* Set the row being updated. This is important to let xterm.c |
3937 | know what line height values are in effect. */ | |
3938 | updated_row = desired_row; | |
3939 | ||
177c0ea7 JB |
3940 | /* A row can be completely invisible in case a desired matrix was |
3941 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
3942 | the matrix. Make sure to make such rows current anyway, since |
3943 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
3944 | if (desired_row->mode_line_p |
3945 | || desired_row->visible_height > 0) | |
408f5064 | 3946 | { |
a54e2c05 | 3947 | eassert (desired_row->enabled_p); |
504805ac GM |
3948 | |
3949 | /* Update display of the left margin area, if there is one. */ | |
3950 | if (!desired_row->full_width_p | |
d3d50620 | 3951 | && !NILP (w->left_margin_cols)) |
504805ac GM |
3952 | { |
3953 | changed_p = 1; | |
3954 | update_marginal_area (w, LEFT_MARGIN_AREA, vpos); | |
3955 | } | |
177c0ea7 | 3956 | |
504805ac GM |
3957 | /* Update the display of the text area. */ |
3958 | if (update_text_area (w, vpos)) | |
3959 | { | |
3960 | changed_p = 1; | |
3961 | if (current_row->mouse_face_p) | |
3962 | *mouse_face_overwritten_p = 1; | |
3963 | } | |
177c0ea7 | 3964 | |
504805ac GM |
3965 | /* Update display of the right margin area, if there is one. */ |
3966 | if (!desired_row->full_width_p | |
d3d50620 | 3967 | && !NILP (w->right_margin_cols)) |
504805ac GM |
3968 | { |
3969 | changed_p = 1; | |
3970 | update_marginal_area (w, RIGHT_MARGIN_AREA, vpos); | |
3971 | } | |
177c0ea7 | 3972 | |
504805ac GM |
3973 | /* Draw truncation marks etc. */ |
3974 | if (!current_row->enabled_p | |
3975 | || desired_row->y != current_row->y | |
3976 | || desired_row->visible_height != current_row->visible_height | |
6b61353c | 3977 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 3978 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
6b61353c | 3979 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 3980 | || desired_row->mode_line_p != current_row->mode_line_p |
6b61353c | 3981 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
3982 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
3983 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
3984 | rif->after_update_window_line_hook (desired_row); | |
408f5064 | 3985 | } |
177c0ea7 | 3986 | |
5f5c8ee5 GM |
3987 | /* Update current_row from desired_row. */ |
3988 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
3989 | updated_row = NULL; | |
408f5064 | 3990 | return changed_p; |
5f5c8ee5 GM |
3991 | } |
3992 | ||
3993 | ||
3994 | /* Set the cursor after an update of window W. This function may only | |
3995 | be called from update_window. */ | |
3996 | ||
3997 | static void | |
971de7fb | 3998 | set_window_cursor_after_update (struct window *w) |
4588ec20 | 3999 | { |
d3d50620 | 4000 | struct frame *f = XFRAME (w->frame); |
fa971ac3 | 4001 | struct redisplay_interface *rif = FRAME_RIF (f); |
5f5c8ee5 GM |
4002 | int cx, cy, vpos, hpos; |
4003 | ||
4004 | /* Not intended for frame matrix updates. */ | |
a54e2c05 | 4005 | eassert (FRAME_WINDOW_P (f)); |
177c0ea7 | 4006 | |
b96fd3e8 GM |
4007 | if (cursor_in_echo_area |
4008 | && !NILP (echo_area_buffer[0]) | |
4009 | /* If we are showing a message instead of the mini-buffer, | |
4010 | show the cursor for the message instead. */ | |
4011 | && XWINDOW (minibuf_window) == w | |
4012 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
4013 | /* These cases apply only to the frame that contains |
4014 | the active mini-buffer window. */ | |
4015 | && FRAME_HAS_MINIBUF_P (f) | |
4016 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
4017 | { | |
4018 | cx = cy = vpos = hpos = 0; | |
4019 | ||
4020 | if (cursor_in_echo_area >= 0) | |
4021 | { | |
4022 | /* If the mini-buffer is several lines high, find the last | |
4023 | line that has any text on it. Note: either all lines | |
4024 | are enabled or none. Otherwise we wouldn't be able to | |
4025 | determine Y. */ | |
862b4790 GM |
4026 | struct glyph_row *row, *last_row; |
4027 | struct glyph *glyph; | |
4028 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 4029 | |
862b4790 | 4030 | last_row = NULL; |
6206f8ce GM |
4031 | row = w->current_matrix->rows; |
4032 | while (row->enabled_p | |
4033 | && (last_row == NULL | |
4034 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 4035 | { |
862b4790 GM |
4036 | if (row->used[TEXT_AREA] |
4037 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
4038 | last_row = row; | |
6206f8ce | 4039 | ++row; |
862b4790 | 4040 | } |
177c0ea7 | 4041 | |
5f5c8ee5 GM |
4042 | if (last_row) |
4043 | { | |
6206f8ce GM |
4044 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
4045 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 4046 | |
b96fd3e8 | 4047 | while (last > start && last->charpos < 0) |
862b4790 | 4048 | --last; |
177c0ea7 | 4049 | |
862b4790 GM |
4050 | for (glyph = start; glyph < last; ++glyph) |
4051 | { | |
4052 | cx += glyph->pixel_width; | |
4053 | ++hpos; | |
4054 | } | |
4055 | ||
5f5c8ee5 | 4056 | cy = last_row->y; |
862b4790 | 4057 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
4058 | } |
4059 | } | |
4060 | } | |
4061 | else | |
4062 | { | |
4063 | cx = w->cursor.x; | |
4064 | cy = w->cursor.y; | |
4065 | hpos = w->cursor.hpos; | |
4066 | vpos = w->cursor.vpos; | |
4067 | } | |
4588ec20 | 4068 | |
5f5c8ee5 | 4069 | /* Window cursor can be out of sync for horizontally split windows. */ |
f951a506 | 4070 | hpos = max (-1, hpos); /* -1 is for when cursor is on the left fringe */ |
5f5c8ee5 GM |
4071 | hpos = min (w->current_matrix->matrix_w - 1, hpos); |
4072 | vpos = max (0, vpos); | |
4073 | vpos = min (w->current_matrix->nrows - 1, vpos); | |
4074 | rif->cursor_to (vpos, hpos, cy, cx); | |
4588ec20 | 4075 | } |
4588ec20 | 4076 | |
5f5c8ee5 | 4077 | |
6df5d75f GM |
4078 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window |
4079 | tree rooted at W. */ | |
4080 | ||
4081 | void | |
59ea14cd | 4082 | set_window_update_flags (struct window *w, bool on_p) |
6df5d75f GM |
4083 | { |
4084 | while (w) | |
4085 | { | |
d3d50620 DA |
4086 | if (!NILP (w->hchild)) |
4087 | set_window_update_flags (XWINDOW (w->hchild), on_p); | |
4088 | else if (!NILP (w->vchild)) | |
4089 | set_window_update_flags (XWINDOW (w->vchild), on_p); | |
6df5d75f GM |
4090 | else |
4091 | w->must_be_updated_p = on_p; | |
4092 | ||
d3d50620 | 4093 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
6df5d75f | 4094 | } |
177c0ea7 | 4095 | } |
6df5d75f GM |
4096 | |
4097 | ||
4098 | \f | |
4099 | /*********************************************************************** | |
4100 | Window-Based Scrolling | |
4101 | ***********************************************************************/ | |
4102 | ||
4103 | /* Structure describing rows in scrolling_window. */ | |
4104 | ||
4105 | struct row_entry | |
4106 | { | |
4107 | /* Number of occurrences of this row in desired and current matrix. */ | |
4108 | int old_uses, new_uses; | |
177c0ea7 | 4109 | |
6df5d75f GM |
4110 | /* Vpos of row in new matrix. */ |
4111 | int new_line_number; | |
4112 | ||
4113 | /* Bucket index of this row_entry in the hash table row_table. */ | |
ca9ce8f2 | 4114 | ptrdiff_t bucket; |
177c0ea7 | 4115 | |
6df5d75f GM |
4116 | /* The row described by this entry. */ |
4117 | struct glyph_row *row; | |
177c0ea7 | 4118 | |
6df5d75f GM |
4119 | /* Hash collision chain. */ |
4120 | struct row_entry *next; | |
4121 | }; | |
4122 | ||
4123 | /* A pool to allocate row_entry structures from, and the size of the | |
4124 | pool. The pool is reallocated in scrolling_window when we find | |
4125 | that we need a larger one. */ | |
4126 | ||
4127 | static struct row_entry *row_entry_pool; | |
ca9ce8f2 | 4128 | static ptrdiff_t row_entry_pool_size; |
6df5d75f GM |
4129 | |
4130 | /* Index of next free entry in row_entry_pool. */ | |
4131 | ||
ca9ce8f2 | 4132 | static ptrdiff_t row_entry_idx; |
6df5d75f GM |
4133 | |
4134 | /* The hash table used during scrolling, and the table's size. This | |
4135 | table is used to quickly identify equal rows in the desired and | |
4136 | current matrix. */ | |
4137 | ||
4138 | static struct row_entry **row_table; | |
ca9ce8f2 | 4139 | static ptrdiff_t row_table_size; |
6df5d75f GM |
4140 | |
4141 | /* Vectors of pointers to row_entry structures belonging to the | |
4142 | current and desired matrix, and the size of the vectors. */ | |
4143 | ||
4144 | static struct row_entry **old_lines, **new_lines; | |
0065d054 | 4145 | static ptrdiff_t old_lines_size, new_lines_size; |
6df5d75f GM |
4146 | |
4147 | /* A pool to allocate run structures from, and its size. */ | |
4148 | ||
4149 | static struct run *run_pool; | |
0065d054 | 4150 | static ptrdiff_t runs_size; |
6df5d75f GM |
4151 | |
4152 | /* A vector of runs of lines found during scrolling. */ | |
4153 | ||
4154 | static struct run **runs; | |
4155 | ||
6b1f9ba4 | 4156 | /* Add glyph row ROW to the scrolling hash table. */ |
6df5d75f | 4157 | |
55d4c1b2 | 4158 | static inline struct row_entry * |
6b1f9ba4 | 4159 | add_row_entry (struct glyph_row *row) |
6df5d75f GM |
4160 | { |
4161 | struct row_entry *entry; | |
ca9ce8f2 | 4162 | ptrdiff_t i = row->hash % row_table_size; |
177c0ea7 | 4163 | |
6df5d75f | 4164 | entry = row_table[i]; |
a54e2c05 | 4165 | eassert (entry || verify_row_hash (row)); |
6b1f9ba4 | 4166 | while (entry && !row_equal_p (entry->row, row, 1)) |
6df5d75f | 4167 | entry = entry->next; |
177c0ea7 | 4168 | |
6df5d75f GM |
4169 | if (entry == NULL) |
4170 | { | |
4171 | entry = row_entry_pool + row_entry_idx++; | |
4172 | entry->row = row; | |
4173 | entry->old_uses = entry->new_uses = 0; | |
4174 | entry->new_line_number = 0; | |
4175 | entry->bucket = i; | |
4176 | entry->next = row_table[i]; | |
4177 | row_table[i] = entry; | |
4178 | } | |
4179 | ||
4180 | return entry; | |
4181 | } | |
4182 | ||
4183 | ||
5f5c8ee5 | 4184 | /* Try to reuse part of the current display of W by scrolling lines. |
59ea14cd | 4185 | HEADER_LINE_P means W has a header line. |
5f5c8ee5 GM |
4186 | |
4187 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4188 | Technique for Isolating Differences Between Files." It should take | |
4189 | O(N) time. | |
4190 | ||
4191 | A short outline of the steps of the algorithm | |
4192 | ||
4193 | 1. Skip lines equal at the start and end of both matrices. | |
4194 | ||
4195 | 2. Enter rows in the current and desired matrix into a symbol | |
4196 | table, counting how often they appear in both matrices. | |
4197 | ||
4198 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4199 | i.e. we assume that such lines are likely to have been moved. | |
4200 | ||
4201 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4202 | forward and backward. | |
4203 | ||
4204 | Value is | |
4205 | ||
4206 | -1 if all rows were found to be equal. | |
4207 | 0 to indicate that we did not scroll the display, or | |
4208 | 1 if we did scroll. */ | |
4209 | ||
4210 | static int | |
59ea14cd | 4211 | scrolling_window (struct window *w, bool header_line_p) |
4588ec20 | 4212 | { |
5f5c8ee5 GM |
4213 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4214 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4215 | int yb = window_text_bottom_y (w); | |
ca9ce8f2 PE |
4216 | ptrdiff_t i; |
4217 | int j, first_old, first_new, last_old, last_new; | |
4218 | int nruns, run_idx; | |
0065d054 | 4219 | ptrdiff_t n; |
6df5d75f | 4220 | struct row_entry *entry; |
fa971ac3 | 4221 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4222 | |
4223 | /* Skip over rows equal at the start. */ | |
59ea14cd | 4224 | for (i = header_line_p; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4225 | { |
bfdcafe1 GM |
4226 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4227 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4228 | ||
4229 | if (c->enabled_p | |
4230 | && d->enabled_p | |
6b61353c | 4231 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4232 | && c->y == d->y |
4233 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4234 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
6b1f9ba4 | 4235 | && row_equal_p (c, d, 1)) |
bfdcafe1 GM |
4236 | { |
4237 | assign_row (c, d); | |
4238 | d->enabled_p = 0; | |
4239 | } | |
4240 | else | |
4241 | break; | |
5f5c8ee5 | 4242 | } |
4588ec20 | 4243 | |
5f5c8ee5 GM |
4244 | /* Give up if some rows in the desired matrix are not enabled. */ |
4245 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4246 | return -1; | |
177c0ea7 | 4247 | |
5f5c8ee5 GM |
4248 | first_old = first_new = i; |
4249 | ||
4d8ade89 YM |
4250 | /* Set last_new to the index + 1 of the row that reaches the |
4251 | bottom boundary in the desired matrix. Give up if we find a | |
4252 | disabled row before we reach the bottom boundary. */ | |
5f5c8ee5 | 4253 | i = first_new + 1; |
4d8ade89 YM |
4254 | while (i < desired_matrix->nrows - 1) |
4255 | { | |
4256 | int bottom; | |
5f5c8ee5 | 4257 | |
4d8ade89 YM |
4258 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) |
4259 | return 0; | |
4260 | bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)); | |
4261 | if (bottom <= yb) | |
4262 | ++i; | |
4263 | if (bottom >= yb) | |
4264 | break; | |
4265 | } | |
5f5c8ee5 GM |
4266 | |
4267 | last_new = i; | |
4268 | ||
4d8ade89 YM |
4269 | /* Set last_old to the index + 1 of the row that reaches the bottom |
4270 | boundary in the current matrix. We don't look at the enabled | |
4271 | flag here because we plan to reuse part of the display even if | |
4272 | other parts are disabled. */ | |
5f5c8ee5 | 4273 | i = first_old + 1; |
93962bfa GM |
4274 | while (i < current_matrix->nrows - 1) |
4275 | { | |
4276 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4277 | if (bottom <= yb) | |
4278 | ++i; | |
4279 | if (bottom >= yb) | |
4280 | break; | |
4281 | } | |
4282 | ||
5f5c8ee5 GM |
4283 | last_old = i; |
4284 | ||
4285 | /* Skip over rows equal at the bottom. */ | |
4286 | i = last_new; | |
4287 | j = last_old; | |
4288 | while (i - 1 > first_new | |
4289 | && j - 1 > first_old | |
1e5b2111 EZ |
4290 | && MATRIX_ROW (current_matrix, j - 1)->enabled_p |
4291 | && (MATRIX_ROW (current_matrix, j - 1)->y | |
4292 | == MATRIX_ROW (desired_matrix, i - 1)->y) | |
4293 | && !MATRIX_ROW (desired_matrix, i - 1)->redraw_fringe_bitmaps_p | |
6b1f9ba4 | 4294 | && row_equal_p (MATRIX_ROW (desired_matrix, i - 1), |
e4e0bee9 | 4295 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
4296 | --i, --j; |
4297 | last_new = i; | |
4298 | last_old = j; | |
4299 | ||
4300 | /* Nothing to do if all rows are equal. */ | |
4301 | if (last_new == first_new) | |
4302 | return 0; | |
4303 | ||
0065d054 | 4304 | /* Check for integer overflow in size calculation. |
ca9ce8f2 PE |
4305 | |
4306 | If next_almost_prime checks (N) for divisibility by 2..10, then | |
4307 | it can return at most N + 10, e.g., next_almost_prime (1) == 11. | |
4308 | So, set next_almost_prime_increment_max to 10. | |
4309 | ||
4310 | It's just a coincidence that next_almost_prime_increment_max == | |
4311 | NEXT_ALMOST_PRIME_LIMIT - 1. If NEXT_ALMOST_PRIME_LIMIT were | |
4312 | 13, then next_almost_prime_increment_max would be 14, e.g., | |
4313 | because next_almost_prime (113) would be 127. */ | |
4314 | { | |
4315 | verify (NEXT_ALMOST_PRIME_LIMIT == 11); | |
4316 | enum { next_almost_prime_increment_max = 10 }; | |
ca9ce8f2 | 4317 | ptrdiff_t row_table_max = |
0065d054 PE |
4318 | (min (PTRDIFF_MAX, SIZE_MAX) / (3 * sizeof *row_table) |
4319 | - next_almost_prime_increment_max); | |
4320 | ptrdiff_t current_nrows_max = row_table_max - desired_matrix->nrows; | |
4321 | if (current_nrows_max < current_matrix->nrows) | |
ca9ce8f2 PE |
4322 | memory_full (SIZE_MAX); |
4323 | } | |
4324 | ||
6df5d75f | 4325 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 4326 | |
6df5d75f | 4327 | if (current_matrix->nrows > old_lines_size) |
0065d054 PE |
4328 | old_lines = xpalloc (old_lines, &old_lines_size, |
4329 | current_matrix->nrows - old_lines_size, | |
4330 | INT_MAX, sizeof *old_lines); | |
177c0ea7 | 4331 | |
6df5d75f | 4332 | if (desired_matrix->nrows > new_lines_size) |
0065d054 PE |
4333 | new_lines = xpalloc (new_lines, &new_lines_size, |
4334 | desired_matrix->nrows - new_lines_size, | |
4335 | INT_MAX, sizeof *new_lines); | |
6df5d75f | 4336 | |
ca9ce8f2 PE |
4337 | n = desired_matrix->nrows; |
4338 | n += current_matrix->nrows; | |
0065d054 | 4339 | if (row_table_size < 3 * n) |
6df5d75f | 4340 | { |
ca9ce8f2 | 4341 | ptrdiff_t size = next_almost_prime (3 * n); |
0065d054 | 4342 | row_table = xnrealloc (row_table, size, sizeof *row_table); |
ca9ce8f2 | 4343 | row_table_size = size; |
0065d054 | 4344 | memset (row_table, 0, size * sizeof *row_table); |
6df5d75f GM |
4345 | } |
4346 | ||
4347 | if (n > row_entry_pool_size) | |
0065d054 PE |
4348 | row_entry_pool = xpalloc (row_entry_pool, &row_entry_pool_size, |
4349 | n - row_entry_pool_size, | |
4350 | -1, sizeof *row_entry_pool); | |
6df5d75f GM |
4351 | |
4352 | if (desired_matrix->nrows > runs_size) | |
4353 | { | |
0065d054 PE |
4354 | runs = xnrealloc (runs, desired_matrix->nrows, sizeof *runs); |
4355 | run_pool = xnrealloc (run_pool, desired_matrix->nrows, sizeof *run_pool); | |
ca9ce8f2 | 4356 | runs_size = desired_matrix->nrows; |
6df5d75f GM |
4357 | } |
4358 | ||
4359 | nruns = run_idx = 0; | |
4360 | row_entry_idx = 0; | |
4361 | ||
4362 | /* Add rows from the current and desired matrix to the hash table | |
4363 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 4364 | |
5f5c8ee5 GM |
4365 | for (i = first_old; i < last_old; ++i) |
4366 | { | |
4367 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
4368 | { | |
6b1f9ba4 | 4369 | entry = add_row_entry (MATRIX_ROW (current_matrix, i)); |
6df5d75f GM |
4370 | old_lines[i] = entry; |
4371 | ++entry->old_uses; | |
5f5c8ee5 GM |
4372 | } |
4373 | else | |
6df5d75f | 4374 | old_lines[i] = NULL; |
5f5c8ee5 GM |
4375 | } |
4376 | ||
5f5c8ee5 GM |
4377 | for (i = first_new; i < last_new; ++i) |
4378 | { | |
a54e2c05 | 4379 | eassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); |
6b1f9ba4 | 4380 | entry = add_row_entry (MATRIX_ROW (desired_matrix, i)); |
6df5d75f GM |
4381 | ++entry->new_uses; |
4382 | entry->new_line_number = i; | |
4383 | new_lines[i] = entry; | |
5f5c8ee5 | 4384 | } |
4588ec20 | 4385 | |
5f5c8ee5 GM |
4386 | /* Identify moves based on lines that are unique and equal |
4387 | in both matrices. */ | |
4388 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
4389 | if (old_lines[i] |
4390 | && old_lines[i]->old_uses == 1 | |
4391 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 | 4392 | { |
27786b2f | 4393 | int p, q; |
6df5d75f GM |
4394 | int new_line = old_lines[i]->new_line_number; |
4395 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
4396 | |
4397 | /* Record move. */ | |
4398 | run->current_vpos = i; | |
4399 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
4400 | run->desired_vpos = new_line; | |
4401 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
4402 | run->nrows = 1; | |
4403 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
4404 | ||
4405 | /* Extend backward. */ | |
27786b2f PE |
4406 | p = i - 1; |
4407 | q = new_line - 1; | |
4408 | while (p > first_old | |
4409 | && q > first_new | |
4410 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4411 | { |
27786b2f | 4412 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 JB |
4413 | --run->current_vpos; |
4414 | --run->desired_vpos; | |
5f5c8ee5 GM |
4415 | ++run->nrows; |
4416 | run->height += h; | |
4417 | run->desired_y -= h; | |
4418 | run->current_y -= h; | |
27786b2f | 4419 | --p, --q; |
5f5c8ee5 | 4420 | } |
4588ec20 | 4421 | |
5f5c8ee5 | 4422 | /* Extend forward. */ |
27786b2f PE |
4423 | p = i + 1; |
4424 | q = new_line + 1; | |
4425 | while (p < last_old | |
4426 | && q < last_new | |
4427 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4428 | { |
27786b2f | 4429 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 | 4430 | ++run->nrows; |
5f5c8ee5 | 4431 | run->height += h; |
27786b2f | 4432 | ++p, ++q; |
5f5c8ee5 | 4433 | } |
19dff8dc | 4434 | |
5f5c8ee5 GM |
4435 | /* Insert run into list of all runs. Order runs by copied |
4436 | pixel lines. Note that we record runs that don't have to | |
4437 | be copied because they are already in place. This is done | |
4438 | because we can avoid calling update_window_line in this | |
4439 | case. */ | |
27786b2f | 4440 | for (p = 0; p < nruns && runs[p]->height > run->height; ++p) |
5f5c8ee5 | 4441 | ; |
27786b2f PE |
4442 | for (q = nruns; q > p; --q) |
4443 | runs[q] = runs[q - 1]; | |
4444 | runs[p] = run; | |
5f5c8ee5 GM |
4445 | ++nruns; |
4446 | ||
4447 | i += run->nrows; | |
4448 | } | |
4449 | else | |
4450 | ++i; | |
4588ec20 | 4451 | |
5f5c8ee5 GM |
4452 | /* Do the moves. Do it in a way that we don't overwrite something |
4453 | we want to copy later on. This is not solvable in general | |
4454 | because there is only one display and we don't have a way to | |
4455 | exchange areas on this display. Example: | |
4588ec20 | 4456 | |
5f5c8ee5 GM |
4457 | +-----------+ +-----------+ |
4458 | | A | | B | | |
4459 | +-----------+ --> +-----------+ | |
4460 | | B | | A | | |
4461 | +-----------+ +-----------+ | |
4588ec20 | 4462 | |
5f5c8ee5 GM |
4463 | Instead, prefer bigger moves, and invalidate moves that would |
4464 | copy from where we copied to. */ | |
ea0d86af | 4465 | |
5f5c8ee5 GM |
4466 | for (i = 0; i < nruns; ++i) |
4467 | if (runs[i]->nrows > 0) | |
4468 | { | |
4469 | struct run *r = runs[i]; | |
24e86043 | 4470 | |
5f5c8ee5 GM |
4471 | /* Copy on the display. */ |
4472 | if (r->current_y != r->desired_y) | |
4473 | { | |
989b42d2 | 4474 | rif->clear_window_mouse_face (w); |
5f5c8ee5 | 4475 | rif->scroll_run_hook (w, r); |
1305621b | 4476 | } |
5f5c8ee5 | 4477 | |
1305621b YM |
4478 | /* Truncate runs that copy to where we copied to, and |
4479 | invalidate runs that copy from where we copied to. */ | |
4480 | for (j = nruns - 1; j > i; --j) | |
4481 | { | |
4482 | struct run *p = runs[j]; | |
59ea14cd | 4483 | bool truncated_p = 0; |
5f5c8ee5 | 4484 | |
1305621b YM |
4485 | if (p->nrows > 0 |
4486 | && p->desired_y < r->desired_y + r->height | |
4487 | && p->desired_y + p->height > r->desired_y) | |
5f5c8ee5 | 4488 | { |
1305621b YM |
4489 | if (p->desired_y < r->desired_y) |
4490 | { | |
4491 | p->nrows = r->desired_vpos - p->desired_vpos; | |
4492 | p->height = r->desired_y - p->desired_y; | |
4493 | truncated_p = 1; | |
4494 | } | |
4495 | else | |
4496 | { | |
4497 | int nrows_copied = (r->desired_vpos + r->nrows | |
4498 | - p->desired_vpos); | |
4499 | ||
4500 | if (p->nrows <= nrows_copied) | |
4501 | p->nrows = 0; | |
4502 | else | |
4503 | { | |
4504 | int height_copied = (r->desired_y + r->height | |
4505 | - p->desired_y); | |
4506 | ||
4507 | p->current_vpos += nrows_copied; | |
4508 | p->desired_vpos += nrows_copied; | |
4509 | p->nrows -= nrows_copied; | |
4510 | p->current_y += height_copied; | |
4511 | p->desired_y += height_copied; | |
4512 | p->height -= height_copied; | |
4513 | truncated_p = 1; | |
4514 | } | |
4515 | } | |
4516 | } | |
177c0ea7 | 4517 | |
1305621b YM |
4518 | if (r->current_y != r->desired_y |
4519 | /* The condition below is equivalent to | |
4520 | ((p->current_y >= r->desired_y | |
5f5c8ee5 | 4521 | && p->current_y < r->desired_y + r->height) |
1305621b | 4522 | || (p->current_y + p->height > r->desired_y |
5f5c8ee5 | 4523 | && (p->current_y + p->height |
1305621b YM |
4524 | <= r->desired_y + r->height))) |
4525 | because we have 0 < p->height <= r->height. */ | |
4526 | && p->current_y < r->desired_y + r->height | |
4527 | && p->current_y + p->height > r->desired_y) | |
4528 | p->nrows = 0; | |
4529 | ||
4530 | /* Reorder runs by copied pixel lines if truncated. */ | |
4531 | if (truncated_p && p->nrows > 0) | |
4532 | { | |
4533 | int k = nruns - 1; | |
4534 | ||
4535 | while (runs[k]->nrows == 0 || runs[k]->height < p->height) | |
4536 | k--; | |
4537 | memmove (runs + j, runs + j + 1, (k - j) * sizeof (*runs)); | |
4538 | runs[k] = p; | |
5f5c8ee5 GM |
4539 | } |
4540 | } | |
ea0d86af | 4541 | |
5f5c8ee5 GM |
4542 | /* Assign matrix rows. */ |
4543 | for (j = 0; j < r->nrows; ++j) | |
4544 | { | |
4545 | struct glyph_row *from, *to; | |
59ea14cd | 4546 | bool to_overlapped_p; |
e876ff42 | 4547 | |
5f5c8ee5 GM |
4548 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
4549 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 4550 | to_overlapped_p = to->overlapped_p; |
e61124cd | 4551 | from->redraw_fringe_bitmaps_p = from->fringe_bitmap_periodic_p; |
5f5c8ee5 | 4552 | assign_row (to, from); |
1305621b YM |
4553 | /* The above `assign_row' actually does swap, so if we had |
4554 | an overlap in the copy destination of two runs, then | |
4555 | the second run would assign a previously disabled bogus | |
4556 | row. But thanks to the truncation code in the | |
4557 | preceding for-loop, we no longer have such an overlap, | |
4558 | and thus the assigned row should always be enabled. */ | |
a54e2c05 | 4559 | eassert (to->enabled_p); |
1305621b | 4560 | from->enabled_p = 0; |
408f5064 | 4561 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
4562 | } |
4563 | } | |
15874c59 | 4564 | |
6df5d75f GM |
4565 | /* Clear the hash table, for the next time. */ |
4566 | for (i = 0; i < row_entry_idx; ++i) | |
4567 | row_table[row_entry_pool[i].bucket] = NULL; | |
4568 | ||
aec1708a PE |
4569 | /* Value is 1 to indicate that we scrolled the display. */ |
4570 | return 0 < nruns; | |
5f5c8ee5 | 4571 | } |
de83c314 | 4572 | |
15874c59 | 4573 | |
4588ec20 | 4574 | \f |
5f5c8ee5 GM |
4575 | /************************************************************************ |
4576 | Frame-Based Updates | |
4577 | ************************************************************************/ | |
4588ec20 | 4578 | |
5f5c8ee5 | 4579 | /* Update the desired frame matrix of frame F. |
4588ec20 | 4580 | |
59ea14cd PE |
4581 | FORCE_P means that the update should not be stopped by pending input. |
4582 | INHIBIT_HAIRY_ID_P means that scrolling should not be tried. | |
5f5c8ee5 | 4583 | |
59ea14cd | 4584 | Value is true if update was stopped due to pending input. */ |
5f5c8ee5 | 4585 | |
59ea14cd PE |
4586 | static bool |
4587 | update_frame_1 (struct frame *f, bool force_p, bool inhibit_id_p) | |
4588ec20 | 4588 | { |
5f5c8ee5 GM |
4589 | /* Frame matrices to work on. */ |
4590 | struct glyph_matrix *current_matrix = f->current_matrix; | |
4591 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
4592 | int i; | |
59ea14cd | 4593 | bool pause_p; |
4588ec20 | 4594 | int preempt_count = baud_rate / 2400 + 1; |
5f5c8ee5 | 4595 | |
a54e2c05 | 4596 | eassert (current_matrix && desired_matrix); |
4588ec20 | 4597 | |
c37e4889 RS |
4598 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
4599 | calculate_costs (f); | |
4600 | ||
d88c2b9e RS |
4601 | if (preempt_count <= 0) |
4602 | preempt_count = 1; | |
4603 | ||
a2130dbb KS |
4604 | #if !PERIODIC_PREEMPTION_CHECKING |
4605 | if (!force_p && detect_input_pending_ignore_squeezables ()) | |
4588ec20 | 4606 | { |
27786b2f | 4607 | pause_p = 1; |
4588ec20 JB |
4608 | goto do_pause; |
4609 | } | |
d012c62b | 4610 | #endif |
4588ec20 | 4611 | |
5f5c8ee5 | 4612 | /* If we cannot insert/delete lines, it's no use trying it. */ |
daf01701 | 4613 | if (!FRAME_LINE_INS_DEL_OK (f)) |
5f5c8ee5 | 4614 | inhibit_id_p = 1; |
7098a0fa | 4615 | |
efb859b4 | 4616 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
4617 | i/d line if just want cursor motion. */ |
4618 | for (i = 0; i < desired_matrix->nrows; i++) | |
4619 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
4620 | break; |
4621 | ||
4622 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
4623 | if (!inhibit_id_p && i < desired_matrix->nrows) |
4624 | force_p |= scrolling (f); | |
4588ec20 JB |
4625 | |
4626 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
4627 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
4628 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 4629 | |
5f5c8ee5 GM |
4630 | /* Now update the rest of the lines. */ |
4631 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 4632 | { |
5f5c8ee5 | 4633 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 4634 | { |
b6a65ac2 | 4635 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
4636 | { |
4637 | /* Flush out every so many lines. | |
4638 | Also flush out if likely to have more than 1k buffered | |
4639 | otherwise. I'm told that some telnet connections get | |
4640 | really screwed by more than 1k output at once. */ | |
fced92f1 CY |
4641 | FILE *display_output = FRAME_TTY (f)->output; |
4642 | if (display_output) | |
4588ec20 | 4643 | { |
fced92f1 CY |
4644 | int outq = PENDING_OUTPUT_COUNT (display_output); |
4645 | if (outq > 900 | |
4646 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
4588ec20 | 4647 | { |
fced92f1 CY |
4648 | fflush (display_output); |
4649 | if (preempt_count == 1) | |
4650 | { | |
a41f8bed | 4651 | #ifdef EMACS_OUTQSIZE |
fced92f1 CY |
4652 | if (EMACS_OUTQSIZE (0, &outq) < 0) |
4653 | /* Probably not a tty. Ignore the error and reset | |
4654 | the outq count. */ | |
4655 | outq = PENDING_OUTPUT_COUNT (FRAME_TTY (f->output)); | |
4588ec20 | 4656 | #endif |
fced92f1 CY |
4657 | outq *= 10; |
4658 | if (baud_rate <= outq && baud_rate > 0) | |
4659 | sleep (outq / baud_rate); | |
4660 | } | |
4588ec20 JB |
4661 | } |
4662 | } | |
4588ec20 JB |
4663 | } |
4664 | ||
d012c62b KS |
4665 | #if PERIODIC_PREEMPTION_CHECKING |
4666 | if (!force_p) | |
4667 | { | |
e9a9ae03 | 4668 | EMACS_TIME tm = current_emacs_time (); |
d35af63c | 4669 | if (EMACS_TIME_LT (preemption_next_check, tm)) |
d012c62b | 4670 | { |
e9a9ae03 | 4671 | preemption_next_check = add_emacs_time (tm, preemption_period); |
993d4ab6 KS |
4672 | if (detect_input_pending_ignore_squeezables ()) |
4673 | break; | |
d012c62b KS |
4674 | } |
4675 | } | |
4676 | #else | |
4677 | if (!force_p && (i - 1) % preempt_count == 0) | |
a2d5fca0 | 4678 | detect_input_pending_ignore_squeezables (); |
d012c62b | 4679 | #endif |
a2960116 | 4680 | |
5f5c8ee5 | 4681 | update_frame_line (f, i); |
4588ec20 | 4682 | } |
4588ec20 | 4683 | } |
177c0ea7 | 4684 | |
b98521db | 4685 | lint_assume (0 <= FRAME_LINES (f)); |
59ea14cd | 4686 | pause_p = 0 < i && i < FRAME_LINES (f) - 1; |
4588ec20 JB |
4687 | |
4688 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
27786b2f | 4689 | if (!pause_p) |
4588ec20 | 4690 | { |
48cf7030 | 4691 | if ((cursor_in_echo_area |
5f5c8ee5 | 4692 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 4693 | show the cursor for the message instead of for the |
5f5c8ee5 | 4694 | (now hidden) mini-buffer contents. */ |
2577053b RS |
4695 | || (EQ (minibuf_window, selected_window) |
4696 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 4697 | && !NILP (echo_area_buffer[0]))) |
2577053b | 4698 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 4699 | the active mini-buffer window. */ |
2577053b | 4700 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 4701 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 4702 | { |
7df02016 | 4703 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
4704 | int row, col; |
4705 | ||
4706 | if (cursor_in_echo_area < 0) | |
4707 | { | |
5f5c8ee5 GM |
4708 | /* Negative value of cursor_in_echo_area means put |
4709 | cursor at beginning of line. */ | |
648fa17d JB |
4710 | row = top; |
4711 | col = 0; | |
4712 | } | |
1113d9db | 4713 | else |
648fa17d | 4714 | { |
5f5c8ee5 GM |
4715 | /* Positive value of cursor_in_echo_area means put |
4716 | cursor at the end of the prompt. If the mini-buffer | |
4717 | is several lines high, find the last line that has | |
4718 | any text on it. */ | |
7df02016 | 4719 | row = FRAME_LINES (f); |
177c0ea7 | 4720 | do |
648fa17d | 4721 | { |
5f5c8ee5 GM |
4722 | --row; |
4723 | col = 0; | |
177c0ea7 | 4724 | |
5f5c8ee5 GM |
4725 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
4726 | { | |
4727 | /* Frame rows are filled up with spaces that | |
4728 | must be ignored here. */ | |
5f5c8ee5 GM |
4729 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
4730 | row); | |
4731 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
4732 | struct glyph *last = start + r->used[TEXT_AREA]; | |
4733 | ||
4734 | while (last > start | |
4735 | && (last - 1)->charpos < 0) | |
4736 | --last; | |
177c0ea7 | 4737 | |
5f5c8ee5 GM |
4738 | col = last - start; |
4739 | } | |
648fa17d JB |
4740 | } |
4741 | while (row > top && col == 0); | |
4742 | ||
6395da5c | 4743 | /* Make sure COL is not out of range. */ |
868e640e | 4744 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 4745 | { |
6395da5c | 4746 | /* If we have another row, advance cursor into it. */ |
7df02016 | 4747 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 4748 | { |
7df02016 | 4749 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
4750 | row++; |
4751 | } | |
4752 | /* Otherwise move it back in range. */ | |
4753 | else | |
868e640e | 4754 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
4755 | } |
4756 | } | |
4757 | ||
385ed61f | 4758 | cursor_to (f, row, col); |
1113d9db | 4759 | } |
4588ec20 | 4760 | else |
5f5c8ee5 GM |
4761 | { |
4762 | /* We have only one cursor on terminal frames. Use it to | |
4763 | display the cursor of the selected window. */ | |
4764 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
4765 | if (w->cursor.vpos >= 0 |
4766 | /* The cursor vpos may be temporarily out of bounds | |
4767 | in the following situation: There is one window, | |
4768 | with the cursor in the lower half of it. The window | |
4769 | is split, and a message causes a redisplay before | |
4770 | a new cursor position has been computed. */ | |
7df02016 | 4771 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
4772 | { |
4773 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
4774 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
4775 | ||
d3d50620 DA |
4776 | if (INTEGERP (w->left_margin_cols)) |
4777 | x += XFASTINT (w->left_margin_cols); | |
177c0ea7 | 4778 | |
7df02016 | 4779 | /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */ |
385ed61f | 4780 | cursor_to (f, y, x); |
5f5c8ee5 GM |
4781 | } |
4782 | } | |
4588ec20 JB |
4783 | } |
4784 | ||
ef1b0ba7 | 4785 | #if !PERIODIC_PREEMPTION_CHECKING |
4588ec20 | 4786 | do_pause: |
ef1b0ba7 | 4787 | #endif |
4588ec20 | 4788 | |
5f5c8ee5 | 4789 | clear_desired_matrices (f); |
27786b2f | 4790 | return pause_p; |
4588ec20 JB |
4791 | } |
4792 | ||
4588ec20 | 4793 | |
5f5c8ee5 | 4794 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 4795 | |
59ea14cd | 4796 | static bool |
971de7fb | 4797 | scrolling (struct frame *frame) |
4588ec20 JB |
4798 | { |
4799 | int unchanged_at_top, unchanged_at_bottom; | |
4800 | int window_size; | |
4801 | int changed_lines; | |
38182d90 PE |
4802 | int *old_hash = alloca (FRAME_LINES (frame) * sizeof (int)); |
4803 | int *new_hash = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4804 | int *draw_cost = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4805 | int *old_draw_cost = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 4806 | register int i; |
7df02016 | 4807 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
4808 | struct glyph_matrix *current_matrix = frame->current_matrix; |
4809 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 4810 | |
5f5c8ee5 | 4811 | if (!current_matrix) |
1088b922 | 4812 | emacs_abort (); |
4588ec20 | 4813 | |
5f5c8ee5 GM |
4814 | /* Compute hash codes of all the lines. Also calculate number of |
4815 | changed lines, number of unchanged lines at the beginning, and | |
4816 | number of unchanged lines at the end. */ | |
4588ec20 JB |
4817 | changed_lines = 0; |
4818 | unchanged_at_top = 0; | |
7df02016 KS |
4819 | unchanged_at_bottom = FRAME_LINES (frame); |
4820 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
4821 | { |
4822 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 4823 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 4824 | return 0; |
5f5c8ee5 GM |
4825 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
4826 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
4827 | { |
4828 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
4829 | new_hash[i] = old_hash[i]; | |
4830 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
4831 | draw_cost[i] = INFINITY; | |
4832 | } | |
4588ec20 | 4833 | else |
f188b3c4 | 4834 | { |
5f5c8ee5 GM |
4835 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
4836 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 4837 | } |
4588ec20 JB |
4838 | |
4839 | if (old_hash[i] != new_hash[i]) | |
4840 | { | |
4841 | changed_lines++; | |
7df02016 | 4842 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
4843 | } |
4844 | else if (i == unchanged_at_top) | |
4845 | unchanged_at_top++; | |
5f5c8ee5 | 4846 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
4847 | } |
4848 | ||
4849 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
daf01701 | 4850 | if ((!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4851 | && changed_lines < baud_rate / 2400) |
7df02016 | 4852 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
4853 | return 1; |
4854 | ||
7df02016 | 4855 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
4856 | - unchanged_at_bottom); |
4857 | ||
daf01701 | 4858 | if (FRAME_SCROLL_REGION_OK (frame)) |
4588ec20 | 4859 | free_at_end_vpos -= unchanged_at_bottom; |
daf01701 | 4860 | else if (FRAME_MEMORY_BELOW_FRAME (frame)) |
4588ec20 JB |
4861 | free_at_end_vpos = -1; |
4862 | ||
4863 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 4864 | current frame and desired frame, don't bother with i/d calc. */ |
daf01701 | 4865 | if (!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4866 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
4867 | && (window_size >= |
4868 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 4869 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
4870 | old_hash, new_hash, draw_cost))) |
4871 | return 0; | |
4872 | ||
5f5c8ee5 GM |
4873 | if (window_size < 2) |
4874 | return 0; | |
4875 | ||
502b9b64 | 4876 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 4877 | draw_cost + unchanged_at_top - 1, |
190bb91a | 4878 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
4879 | old_hash + unchanged_at_top - 1, |
4880 | new_hash + unchanged_at_top - 1, | |
4881 | free_at_end_vpos - unchanged_at_top); | |
4882 | ||
4883 | return 0; | |
4884 | } | |
4588ec20 | 4885 | |
4588ec20 | 4886 | |
5f5c8ee5 GM |
4887 | /* Count the number of blanks at the start of the vector of glyphs R |
4888 | which is LEN glyphs long. */ | |
4588ec20 | 4889 | |
4588ec20 | 4890 | static int |
971de7fb | 4891 | count_blanks (struct glyph *r, int len) |
4588ec20 | 4892 | { |
5f5c8ee5 | 4893 | int i; |
177c0ea7 | 4894 | |
5f5c8ee5 GM |
4895 | for (i = 0; i < len; ++i) |
4896 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
4897 | break; | |
4898 | ||
4899 | return i; | |
4588ec20 JB |
4900 | } |
4901 | ||
5f5c8ee5 GM |
4902 | |
4903 | /* Count the number of glyphs in common at the start of the glyph | |
4904 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
4905 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
4906 | ||
4588ec20 | 4907 | static int |
971de7fb | 4908 | count_match (struct glyph *str1, struct glyph *end1, struct glyph *str2, struct glyph *end2) |
4588ec20 | 4909 | { |
5f5c8ee5 GM |
4910 | struct glyph *p1 = str1; |
4911 | struct glyph *p2 = str2; | |
177c0ea7 | 4912 | |
5f5c8ee5 GM |
4913 | while (p1 < end1 |
4914 | && p2 < end2 | |
42186983 | 4915 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 4916 | ++p1, ++p2; |
177c0ea7 | 4917 | |
5f5c8ee5 | 4918 | return p1 - str1; |
4588ec20 JB |
4919 | } |
4920 | ||
5f5c8ee5 | 4921 | |
4588ec20 | 4922 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 4923 | |
5e617bc2 | 4924 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS ((f))]) |
4588ec20 | 4925 | |
5f5c8ee5 GM |
4926 | |
4927 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
4928 | ||
4588ec20 | 4929 | static void |
971de7fb | 4930 | update_frame_line (struct frame *f, int vpos) |
4588ec20 | 4931 | { |
5f5c8ee5 | 4932 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
4933 | int tem; |
4934 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
4935 | struct glyph_matrix *current_matrix = f->current_matrix; |
4936 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
4937 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
4938 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
59ea14cd PE |
4939 | bool must_write_whole_line_p; |
4940 | bool write_spaces_p = FRAME_MUST_WRITE_SPACES (f); | |
4941 | bool colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background | |
4942 | != FACE_TTY_DEFAULT_BG_COLOR); | |
0a894bad GM |
4943 | |
4944 | if (colored_spaces_p) | |
4945 | write_spaces_p = 1; | |
5f5c8ee5 | 4946 | |
26c63686 GM |
4947 | /* Current row not enabled means it has unknown contents. We must |
4948 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
4949 | must_write_whole_line_p = !current_row->enabled_p; |
4950 | if (must_write_whole_line_p) | |
4588ec20 | 4951 | { |
5f5c8ee5 | 4952 | obody = 0; |
4588ec20 JB |
4953 | olen = 0; |
4954 | } | |
4955 | else | |
4956 | { | |
5f5c8ee5 GM |
4957 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
4958 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 4959 | |
4cecaab8 MB |
4960 | /* Ignore trailing spaces, if we can. */ |
4961 | if (!write_spaces_p) | |
4962 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
4963 | olen--; | |
4588ec20 JB |
4964 | } |
4965 | ||
5f5c8ee5 GM |
4966 | current_row->enabled_p = 1; |
4967 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 4968 | |
5f5c8ee5 GM |
4969 | /* If desired line is empty, just clear the line. */ |
4970 | if (!desired_row->enabled_p) | |
4588ec20 JB |
4971 | { |
4972 | nlen = 0; | |
4973 | goto just_erase; | |
4974 | } | |
4975 | ||
5f5c8ee5 GM |
4976 | nbody = desired_row->glyphs[TEXT_AREA]; |
4977 | nlen = desired_row->used[TEXT_AREA]; | |
4978 | nend = nbody + nlen; | |
4979 | ||
4980 | /* If display line has unknown contents, write the whole line. */ | |
4981 | if (must_write_whole_line_p) | |
4982 | { | |
26c63686 | 4983 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 4984 | if (!write_spaces_p) |
74ca462f GM |
4985 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
4986 | --nlen; | |
4987 | ||
26c63686 | 4988 | /* Write the contents of the desired line. */ |
74ca462f | 4989 | if (nlen) |
26c63686 | 4990 | { |
385ed61f KL |
4991 | cursor_to (f, vpos, 0); |
4992 | write_glyphs (f, nbody, nlen); | |
26c63686 | 4993 | } |
177c0ea7 | 4994 | |
26c63686 GM |
4995 | /* Don't call clear_end_of_line if we already wrote the whole |
4996 | line. The cursor will not be at the right margin in that | |
4997 | case but in the line below. */ | |
7df02016 | 4998 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 | 4999 | { |
385ed61f KL |
5000 | cursor_to (f, vpos, nlen); |
5001 | clear_end_of_line (f, FRAME_TOTAL_COLS (f)); | |
26c63686 | 5002 | } |
58827478 GM |
5003 | else |
5004 | /* Make sure we are in the right row, otherwise cursor movement | |
5005 | with cmgoto might use `ch' in the wrong row. */ | |
385ed61f | 5006 | cursor_to (f, vpos, 0); |
177c0ea7 | 5007 | |
5f5c8ee5 GM |
5008 | make_current (desired_matrix, current_matrix, vpos); |
5009 | return; | |
5010 | } | |
4588ec20 JB |
5011 | |
5012 | /* Pretend trailing spaces are not there at all, | |
5013 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
5014 | if (!write_spaces_p) |
5015 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
5016 | nlen--; | |
4588ec20 JB |
5017 | |
5018 | /* If there's no i/d char, quickly do the best we can without it. */ | |
daf01701 | 5019 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
4588ec20 | 5020 | { |
5f5c8ee5 | 5021 | int i, j; |
4588ec20 | 5022 | |
5f5c8ee5 GM |
5023 | /* Find the first glyph in desired row that doesn't agree with |
5024 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
5025 | for (i = 0; i < nlen; i++) |
5026 | { | |
5f5c8ee5 | 5027 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 5028 | { |
5f5c8ee5 GM |
5029 | /* Find the end of the run of different glyphs. */ |
5030 | j = i + 1; | |
5031 | while (j < nlen | |
5032 | && (j >= olen | |
5033 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
5034 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
5035 | ++j; | |
177c0ea7 JB |
5036 | |
5037 | /* Output this run of non-matching chars. */ | |
385ed61f KL |
5038 | cursor_to (f, vpos, i); |
5039 | write_glyphs (f, nbody + i, j - i); | |
5f5c8ee5 | 5040 | i = j - 1; |
4588ec20 JB |
5041 | |
5042 | /* Now find the next non-match. */ | |
5043 | } | |
5044 | } | |
5045 | ||
5046 | /* Clear the rest of the line, or the non-clear part of it. */ | |
5047 | if (olen > nlen) | |
5048 | { | |
385ed61f KL |
5049 | cursor_to (f, vpos, nlen); |
5050 | clear_end_of_line (f, olen); | |
4588ec20 JB |
5051 | } |
5052 | ||
5f5c8ee5 GM |
5053 | /* Make current row = desired row. */ |
5054 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
5055 | return; |
5056 | } | |
5057 | ||
5f5c8ee5 GM |
5058 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
5059 | characters in a row. */ | |
5060 | ||
4588ec20 JB |
5061 | if (!olen) |
5062 | { | |
5f5c8ee5 GM |
5063 | /* If current line is blank, skip over initial spaces, if |
5064 | possible, and write the rest. */ | |
4cecaab8 | 5065 | if (write_spaces_p) |
5f5c8ee5 GM |
5066 | nsp = 0; |
5067 | else | |
5068 | nsp = count_blanks (nbody, nlen); | |
5069 | ||
4588ec20 JB |
5070 | if (nlen > nsp) |
5071 | { | |
385ed61f KL |
5072 | cursor_to (f, vpos, nsp); |
5073 | write_glyphs (f, nbody + nsp, nlen - nsp); | |
4588ec20 JB |
5074 | } |
5075 | ||
502b9b64 | 5076 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 5077 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
5078 | return; |
5079 | } | |
5080 | ||
4588ec20 | 5081 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 5082 | osp = count_blanks (obody, olen); |
4cecaab8 | 5083 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 5084 | |
5f5c8ee5 GM |
5085 | /* Compute number of matching chars starting with first non-blank. */ |
5086 | begmatch = count_match (obody + osp, obody + olen, | |
5087 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
5088 | |
5089 | /* Spaces in new match implicit space past the end of old. */ | |
5090 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 5091 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
5092 | { |
5093 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
5094 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
5095 | ++begmatch; | |
4588ec20 JB |
5096 | } |
5097 | ||
5098 | /* Avoid doing insert/delete char | |
5099 | just cause number of leading spaces differs | |
5f5c8ee5 | 5100 | when the following text does not match. */ |
4588ec20 JB |
5101 | if (begmatch == 0 && osp != nsp) |
5102 | osp = nsp = min (osp, nsp); | |
5103 | ||
5104 | /* Find matching characters at end of line */ | |
5105 | op1 = obody + olen; | |
5106 | np1 = nbody + nlen; | |
5107 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
5108 | while (op1 > op2 |
5109 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
5110 | { |
5111 | op1--; | |
5112 | np1--; | |
5113 | } | |
5114 | endmatch = obody + olen - op1; | |
5115 | ||
4588ec20 JB |
5116 | /* tem gets the distance to insert or delete. |
5117 | endmatch is how many characters we save by doing so. | |
5118 | Is it worth it? */ | |
5119 | ||
5120 | tem = (nlen - nsp) - (olen - osp); | |
5121 | if (endmatch && tem | |
daf01701 | 5122 | && (!FRAME_CHAR_INS_DEL_OK (f) |
8a56675d | 5123 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
5124 | endmatch = 0; |
5125 | ||
5126 | /* nsp - osp is the distance to insert or delete. | |
5127 | If that is nonzero, begmatch is known to be nonzero also. | |
5128 | begmatch + endmatch is how much we save by doing the ins/del. | |
5129 | Is it worth it? */ | |
5130 | ||
5131 | if (nsp != osp | |
daf01701 | 5132 | && (!FRAME_CHAR_INS_DEL_OK (f) |
c363a1d6 | 5133 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
5134 | { |
5135 | begmatch = 0; | |
5136 | endmatch = 0; | |
5137 | osp = nsp = min (osp, nsp); | |
5138 | } | |
5139 | ||
5140 | /* Now go through the line, inserting, writing and | |
5141 | deleting as appropriate. */ | |
5142 | ||
5143 | if (osp > nsp) | |
5144 | { | |
385ed61f KL |
5145 | cursor_to (f, vpos, nsp); |
5146 | delete_glyphs (f, osp - nsp); | |
4588ec20 JB |
5147 | } |
5148 | else if (nsp > osp) | |
5149 | { | |
5150 | /* If going to delete chars later in line | |
5151 | and insert earlier in the line, | |
5152 | must delete first to avoid losing data in the insert */ | |
5153 | if (endmatch && nlen < olen + nsp - osp) | |
5154 | { | |
385ed61f KL |
5155 | cursor_to (f, vpos, nlen - endmatch + osp - nsp); |
5156 | delete_glyphs (f, olen + nsp - osp - nlen); | |
4588ec20 JB |
5157 | olen = nlen - (nsp - osp); |
5158 | } | |
385ed61f KL |
5159 | cursor_to (f, vpos, osp); |
5160 | insert_glyphs (f, 0, nsp - osp); | |
4588ec20 JB |
5161 | } |
5162 | olen += nsp - osp; | |
5163 | ||
5164 | tem = nsp + begmatch + endmatch; | |
5165 | if (nlen != tem || olen != tem) | |
5166 | { | |
4588ec20 JB |
5167 | if (!endmatch || nlen == olen) |
5168 | { | |
c363a1d6 GM |
5169 | /* If new text being written reaches right margin, there is |
5170 | no need to do clear-to-eol at the end of this function | |
5171 | (and it would not be safe, since cursor is not going to | |
5172 | be "at the margin" after the text is done). */ | |
7df02016 | 5173 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 5174 | olen = 0; |
c363a1d6 GM |
5175 | |
5176 | /* Function write_glyphs is prepared to do nothing | |
5177 | if passed a length <= 0. Check it here to avoid | |
5178 | unnecessary cursor movement. */ | |
5179 | if (nlen - tem > 0) | |
5180 | { | |
385ed61f KL |
5181 | cursor_to (f, vpos, nsp + begmatch); |
5182 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
c363a1d6 | 5183 | } |
4588ec20 JB |
5184 | } |
5185 | else if (nlen > olen) | |
5186 | { | |
24e86043 KH |
5187 | /* Here, we used to have the following simple code: |
5188 | ---------------------------------------- | |
5189 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
5190 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
5191 | ---------------------------------------- | |
5192 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
5193 | is a padding glyph. */ | |
5194 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
5195 | int del; | |
5f5c8ee5 | 5196 | |
385ed61f | 5197 | cursor_to (f, vpos, nsp + begmatch); |
177c0ea7 | 5198 | |
5f5c8ee5 | 5199 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
5200 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
5201 | out--; | |
385ed61f | 5202 | write_glyphs (f, nbody + nsp + begmatch, out); |
177c0ea7 | 5203 | |
5f5c8ee5 GM |
5204 | /* If we left columns to be overwritten, we must delete them. */ |
5205 | del = olen - tem - out; | |
c363a1d6 | 5206 | if (del > 0) |
385ed61f | 5207 | delete_glyphs (f, del); |
177c0ea7 | 5208 | |
5f5c8ee5 | 5209 | /* At last, we insert columns not yet written out. */ |
385ed61f | 5210 | insert_glyphs (f, nbody + nsp + begmatch + out, nlen - olen + del); |
5f5c8ee5 GM |
5211 | olen = nlen; |
5212 | } | |
5213 | else if (olen > nlen) | |
5214 | { | |
385ed61f KL |
5215 | cursor_to (f, vpos, nsp + begmatch); |
5216 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
5217 | delete_glyphs (f, olen - nlen); | |
5f5c8ee5 GM |
5218 | olen = nlen; |
5219 | } | |
bd9e3e75 | 5220 | } |
5f5c8ee5 GM |
5221 | |
5222 | just_erase: | |
5223 | /* If any unerased characters remain after the new line, erase them. */ | |
5224 | if (olen > nlen) | |
078b3696 | 5225 | { |
385ed61f KL |
5226 | cursor_to (f, vpos, nlen); |
5227 | clear_end_of_line (f, olen); | |
078b3696 | 5228 | } |
5f5c8ee5 GM |
5229 | |
5230 | /* Exchange contents between current_frame and new_frame. */ | |
5231 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5232 | } |
5f5c8ee5 GM |
5233 | |
5234 | ||
078b3696 | 5235 | \f |
5f5c8ee5 GM |
5236 | /*********************************************************************** |
5237 | X/Y Position -> Buffer Position | |
5238 | ***********************************************************************/ | |
5239 | ||
a1b0a6db | 5240 | /* Determine what's under window-relative pixel position (*X, *Y). |
2396cbba | 5241 | Return the OBJECT (string or buffer) that's there. |
6b61353c | 5242 | Return in *POS the position in that object. |
2396cbba EZ |
5243 | Adjust *X and *Y to character positions. |
5244 | Return in *DX and *DY the pixel coordinates of the click, | |
5245 | relative to the top left corner of OBJECT, or relative to | |
5246 | the top left corner of the character glyph at (*X, *Y) | |
5247 | if OBJECT is nil. | |
5248 | Return WIDTH and HEIGHT of the object at (*X, *Y), or zero | |
5249 | if the coordinates point to an empty area of the display. */ | |
5f5c8ee5 | 5250 | |
6b61353c | 5251 | Lisp_Object |
971de7fb | 5252 | 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 | 5253 | { |
5f5c8ee5 | 5254 | struct it it; |
707ea971 | 5255 | Lisp_Object old_current_buffer = Fcurrent_buffer (); |
5f5c8ee5 | 5256 | struct text_pos startp; |
6b61353c KH |
5257 | Lisp_Object string; |
5258 | struct glyph_row *row; | |
cedd7cd9 KS |
5259 | #ifdef HAVE_WINDOW_SYSTEM |
5260 | struct image *img = 0; | |
5261 | #endif | |
2396cbba | 5262 | int x0, x1, to_x; |
57b3e30b | 5263 | void *itdata = NULL; |
5f5c8ee5 | 5264 | |
707ea971 CY |
5265 | /* We used to set current_buffer directly here, but that does the |
5266 | wrong thing with `face-remapping-alist' (bug#2044). */ | |
d3d50620 | 5267 | Fset_buffer (w->buffer); |
57b3e30b | 5268 | itdata = bidi_shelve_cache (); |
d3d50620 | 5269 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
5f5c8ee5 GM |
5270 | CHARPOS (startp) = min (ZV, max (BEGV, CHARPOS (startp))); |
5271 | BYTEPOS (startp) = min (ZV_BYTE, max (BEGV_BYTE, BYTEPOS (startp))); | |
5272 | start_display (&it, w, startp); | |
352ec8ff EZ |
5273 | /* start_display takes into account the header-line row, but IT's |
5274 | vpos still counts from the glyph row that includes the window's | |
5275 | start position. Adjust for a possible header-line row. */ | |
59ea14cd | 5276 | it.vpos += WINDOW_WANTS_HEADER_LINE_P (w); |
177c0ea7 | 5277 | |
9173a8fb | 5278 | x0 = *x; |
2396cbba EZ |
5279 | |
5280 | /* First, move to the beginning of the row corresponding to *Y. We | |
5281 | need to be in that row to get the correct value of base paragraph | |
40629f17 | 5282 | direction for the text at (*X, *Y). */ |
2396cbba EZ |
5283 | move_it_to (&it, -1, 0, *y, -1, MOVE_TO_X | MOVE_TO_Y); |
5284 | ||
5285 | /* TO_X is the pixel position that the iterator will compute for the | |
40629f17 EZ |
5286 | glyph at *X. We add it.first_visible_x because iterator |
5287 | positions include the hscroll. */ | |
2396cbba EZ |
5288 | to_x = x0 + it.first_visible_x; |
5289 | if (it.bidi_it.paragraph_dir == R2L) | |
5290 | /* For lines in an R2L paragraph, we need to mirror TO_X wrt the | |
5291 | text area. This is because the iterator, even in R2L | |
5292 | paragraphs, delivers glyphs as if they started at the left | |
5293 | margin of the window. (When we actually produce glyphs for | |
5294 | display, we reverse their order in PRODUCE_GLYPHS, but the | |
5295 | iterator doesn't know about that.) The following line adjusts | |
5296 | the pixel position to the iterator geometry, which is what | |
40629f17 EZ |
5297 | move_it_* routines use. (The -1 is because in a window whose |
5298 | text-area width is W, the rightmost pixel position is W-1, and | |
5299 | it should be mirrored into zero pixel position.) */ | |
5300 | to_x = window_box_width (w, TEXT_AREA) - to_x - 1; | |
5301 | ||
5302 | /* Now move horizontally in the row to the glyph under *X. Second | |
5303 | argument is ZV to prevent move_it_in_display_line from matching | |
5304 | based on buffer positions. */ | |
2396cbba | 5305 | move_it_in_display_line (&it, ZV, to_x, MOVE_TO_X); |
35928349 | 5306 | bidi_unshelve_cache (itdata, 0); |
177c0ea7 | 5307 | |
707ea971 | 5308 | Fset_buffer (old_current_buffer); |
a1b0a6db | 5309 | |
6b61353c KH |
5310 | *dx = x0 + it.first_visible_x - it.current_x; |
5311 | *dy = *y - it.current_y; | |
5312 | ||
d3d50620 | 5313 | string = w->buffer; |
6b61353c KH |
5314 | if (STRINGP (it.string)) |
5315 | string = it.string; | |
a1b0a6db | 5316 | *pos = it.current; |
86282aab KH |
5317 | if (it.what == IT_COMPOSITION |
5318 | && it.cmp_it.nchars > 1 | |
5319 | && it.cmp_it.reversed_p) | |
5320 | { | |
5321 | /* The current display element is a grapheme cluster in a | |
5322 | composition. In that case, we need the position of the first | |
5323 | character of the cluster. But, as it.cmp_it.reversed_p is 1, | |
5324 | it.current points to the last character of the cluster, thus | |
5325 | we must move back to the first character of the same | |
5326 | cluster. */ | |
5327 | CHARPOS (pos->pos) -= it.cmp_it.nchars - 1; | |
5328 | if (STRINGP (it.string)) | |
5329 | BYTEPOS (pos->pos) = string_char_to_byte (string, CHARPOS (pos->pos)); | |
5330 | else | |
d3d50620 | 5331 | BYTEPOS (pos->pos) = buf_charpos_to_bytepos (XBUFFER (w->buffer), |
425cc014 | 5332 | CHARPOS (pos->pos)); |
86282aab | 5333 | } |
6b61353c KH |
5334 | |
5335 | #ifdef HAVE_WINDOW_SYSTEM | |
5336 | if (it.what == IT_IMAGE) | |
5337 | { | |
6b61353c KH |
5338 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5339 | && !NILP (img->spec)) | |
5340 | *object = img->spec; | |
5341 | } | |
5342 | #endif | |
5343 | ||
b70d98e1 KS |
5344 | if (it.vpos < w->current_matrix->nrows |
5345 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5346 | row->enabled_p)) | |
6b61353c KH |
5347 | { |
5348 | if (it.hpos < row->used[TEXT_AREA]) | |
5349 | { | |
5350 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6b61353c | 5351 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5352 | if (img) |
5353 | { | |
5354 | *dy -= row->ascent - glyph->ascent; | |
4be9765d KH |
5355 | *dx += glyph->slice.img.x; |
5356 | *dy += glyph->slice.img.y; | |
cedd7cd9 KS |
5357 | /* Image slices positions are still relative to the entire image */ |
5358 | *width = img->width; | |
5359 | *height = img->height; | |
5360 | } | |
5361 | else | |
6b61353c | 5362 | #endif |
cedd7cd9 KS |
5363 | { |
5364 | *width = glyph->pixel_width; | |
5365 | *height = glyph->ascent + glyph->descent; | |
5366 | } | |
6b61353c KH |
5367 | } |
5368 | else | |
5369 | { | |
5370 | *width = 0; | |
5371 | *height = row->height; | |
5372 | } | |
5373 | } | |
5374 | else | |
5375 | { | |
5376 | *width = *height = 0; | |
5377 | } | |
5378 | ||
5379 | /* Add extra (default width) columns if clicked after EOL. */ | |
5e617bc2 | 5380 | x1 = max (0, it.current_x + it.pixel_width - it.first_visible_x); |
6b61353c KH |
5381 | if (x0 > x1) |
5382 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5383 | ||
5384 | *x = it.hpos; | |
5385 | *y = it.vpos; | |
5386 | ||
5387 | return string; | |
5f5c8ee5 | 5388 | } |
4588ec20 | 5389 | |
5f5c8ee5 GM |
5390 | |
5391 | /* Value is the string under window-relative coordinates X/Y in the | |
6b61353c KH |
5392 | mode line or header line (PART says which) of window W, or nil if none. |
5393 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
5394 | |
5395 | Lisp_Object | |
ace1712c | 5396 | mode_line_string (struct window *w, enum window_part part, |
d311d28c | 5397 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5398 | int *dx, int *dy, int *width, int *height) |
5f5c8ee5 GM |
5399 | { |
5400 | struct glyph_row *row; | |
5401 | struct glyph *glyph, *end; | |
6b61353c | 5402 | int x0, y0; |
5f5c8ee5 GM |
5403 | Lisp_Object string = Qnil; |
5404 | ||
641bdbf3 | 5405 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
5406 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
5407 | else | |
045dee35 | 5408 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
6b61353c KH |
5409 | y0 = *y - row->y; |
5410 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
5f5c8ee5 GM |
5411 | |
5412 | if (row->mode_line_p && row->enabled_p) | |
4588ec20 | 5413 | { |
5f5c8ee5 GM |
5414 | /* Find the glyph under X. If we find one with a string object, |
5415 | it's the one we were looking for. */ | |
5416 | glyph = row->glyphs[TEXT_AREA]; | |
5417 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 5418 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5419 | x0 -= glyph->pixel_width; |
5420 | *x = glyph - row->glyphs[TEXT_AREA]; | |
5421 | if (glyph < end) | |
5422 | { | |
5423 | string = glyph->object; | |
5424 | *charpos = glyph->charpos; | |
5425 | *width = glyph->pixel_width; | |
5426 | *height = glyph->ascent + glyph->descent; | |
5427 | #ifdef HAVE_WINDOW_SYSTEM | |
5428 | if (glyph->type == IMAGE_GLYPH) | |
5429 | { | |
5430 | struct image *img; | |
5431 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5432 | if (img != NULL) | |
5433 | *object = img->spec; | |
5434 | y0 -= row->ascent - glyph->ascent; | |
5435 | } | |
5436 | #endif | |
5437 | } | |
5438 | else | |
5439 | { | |
5440 | /* Add extra (default width) columns if clicked after EOL. */ | |
5441 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5442 | *width = 0; | |
5443 | *height = row->height; | |
5444 | } | |
5445 | } | |
5446 | else | |
5447 | { | |
5448 | *x = 0; | |
5449 | x0 = 0; | |
5450 | *width = *height = 0; | |
4588ec20 | 5451 | } |
5f5c8ee5 | 5452 | |
6b61353c KH |
5453 | *dx = x0; |
5454 | *dy = y0; | |
5455 | ||
5f5c8ee5 | 5456 | return string; |
4588ec20 | 5457 | } |
5f5c8ee5 GM |
5458 | |
5459 | ||
db1db309 GM |
5460 | /* Value is the string under window-relative coordinates X/Y in either |
5461 | marginal area, or nil if none. *CHARPOS is set to the position in | |
5462 | the string returned. */ | |
5463 | ||
5464 | Lisp_Object | |
ace1712c | 5465 | marginal_area_string (struct window *w, enum window_part part, |
d311d28c | 5466 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5467 | int *dx, int *dy, int *width, int *height) |
db1db309 GM |
5468 | { |
5469 | struct glyph_row *row = w->current_matrix->rows; | |
5470 | struct glyph *glyph, *end; | |
6b61353c | 5471 | int x0, y0, i, wy = *y; |
641bdbf3 | 5472 | int area; |
db1db309 GM |
5473 | Lisp_Object string = Qnil; |
5474 | ||
641bdbf3 | 5475 | if (part == ON_LEFT_MARGIN) |
db1db309 | 5476 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 5477 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
5478 | area = RIGHT_MARGIN_AREA; |
5479 | else | |
1088b922 | 5480 | emacs_abort (); |
db1db309 GM |
5481 | |
5482 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
5483 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
5484 | break; | |
6b61353c KH |
5485 | y0 = *y - row->y; |
5486 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
db1db309 GM |
5487 | |
5488 | if (row->enabled_p) | |
5489 | { | |
5490 | /* Find the glyph under X. If we find one with a string object, | |
5491 | it's the one we were looking for. */ | |
db1db309 | 5492 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 5493 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5494 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5495 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) |
5496 | + window_box_width (w, LEFT_MARGIN_AREA) | |
5497 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 5498 | else |
7df02016 | 5499 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5500 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5501 | : 0); |
5502 | ||
6b61353c KH |
5503 | glyph = row->glyphs[area]; |
5504 | end = glyph + row->used[area]; | |
cfde341f | 5505 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5506 | x0 -= glyph->pixel_width; |
5507 | *x = glyph - row->glyphs[area]; | |
5508 | if (glyph < end) | |
5509 | { | |
5510 | string = glyph->object; | |
5511 | *charpos = glyph->charpos; | |
5512 | *width = glyph->pixel_width; | |
5513 | *height = glyph->ascent + glyph->descent; | |
5514 | #ifdef HAVE_WINDOW_SYSTEM | |
5515 | if (glyph->type == IMAGE_GLYPH) | |
5516 | { | |
5517 | struct image *img; | |
5518 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5519 | if (img != NULL) | |
5520 | *object = img->spec; | |
5521 | y0 -= row->ascent - glyph->ascent; | |
4be9765d KH |
5522 | x0 += glyph->slice.img.x; |
5523 | y0 += glyph->slice.img.y; | |
6b61353c KH |
5524 | } |
5525 | #endif | |
5526 | } | |
5527 | else | |
5528 | { | |
5529 | /* Add extra (default width) columns if clicked after EOL. */ | |
5530 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5531 | *width = 0; | |
5532 | *height = row->height; | |
5533 | } | |
db1db309 | 5534 | } |
6b61353c KH |
5535 | else |
5536 | { | |
5537 | x0 = 0; | |
5538 | *x = 0; | |
5539 | *width = *height = 0; | |
5540 | } | |
5541 | ||
5542 | *dx = x0; | |
5543 | *dy = y0; | |
db1db309 GM |
5544 | |
5545 | return string; | |
5546 | } | |
5547 | ||
5548 | ||
5f5c8ee5 GM |
5549 | /*********************************************************************** |
5550 | Changing Frame Sizes | |
5551 | ***********************************************************************/ | |
4588ec20 JB |
5552 | |
5553 | #ifdef SIGWINCH | |
5f5c8ee5 | 5554 | |
9af30bdf | 5555 | static void |
971de7fb DN |
5556 | window_change_signal (int signalnum) /* If we don't have an argument, */ |
5557 | /* some compilers complain in signal calls. */ | |
4588ec20 JB |
5558 | { |
5559 | int width, height; | |
4588ec20 JB |
5560 | int old_errno = errno; |
5561 | ||
28d7d09f | 5562 | struct tty_display_info *tty; |
4d553a13 | 5563 | |
333f1b6f JD |
5564 | signal (SIGWINCH, window_change_signal); |
5565 | SIGNAL_THREAD_CHECK (signalnum); | |
5566 | ||
9628b887 KL |
5567 | /* The frame size change obviously applies to a single |
5568 | termcap-controlled terminal, but we can't decide which. | |
5569 | Therefore, we resize the frames corresponding to each tty. | |
9628b887 KL |
5570 | */ |
5571 | for (tty = tty_list; tty; tty = tty->next) { | |
4588ec20 | 5572 | |
0a125897 KL |
5573 | if (! tty->term_initted) |
5574 | continue; | |
4588ec20 | 5575 | |
db878925 DN |
5576 | /* Suspended tty frames have tty->input == NULL avoid trying to |
5577 | use it. */ | |
5578 | if (!tty->input) | |
5579 | continue; | |
5580 | ||
0b0d3e0b | 5581 | get_tty_size (fileno (tty->input), &width, &height); |
3fc809e2 | 5582 | |
bedeffcf | 5583 | if (width > 5 && height > 2) { |
9628b887 | 5584 | Lisp_Object tail, frame; |
3fc809e2 | 5585 | |
9628b887 | 5586 | FOR_EACH_FRAME (tail, frame) |
4d553a13 KL |
5587 | if (FRAME_TERMCAP_P (XFRAME (frame)) && FRAME_TTY (XFRAME (frame)) == tty) |
5588 | /* Record the new sizes, but don't reallocate the data | |
5589 | structures now. Let that be done later outside of the | |
5590 | signal handler. */ | |
5591 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); | |
9628b887 | 5592 | } |
4588ec20 | 5593 | } |
3fc809e2 | 5594 | |
4588ec20 JB |
5595 | errno = old_errno; |
5596 | } | |
5597 | #endif /* SIGWINCH */ | |
5598 | ||
5599 | ||
59ea14cd PE |
5600 | /* Do any change in frame size that was requested by a signal. |
5601 | SAFE means this function is called from a place where it is | |
5602 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 5603 | |
dfcf069d | 5604 | void |
59ea14cd | 5605 | do_pending_window_change (bool safe) |
4588ec20 JB |
5606 | { |
5607 | /* If window_change_signal should have run before, run it now. */ | |
b96fd3e8 GM |
5608 | if (redisplaying_p && !safe) |
5609 | return; | |
177c0ea7 | 5610 | |
4588ec20 JB |
5611 | while (delayed_size_change) |
5612 | { | |
35f56f96 | 5613 | Lisp_Object tail, frame; |
4588ec20 JB |
5614 | |
5615 | delayed_size_change = 0; | |
5616 | ||
35f56f96 | 5617 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5618 | { |
5f5c8ee5 | 5619 | struct frame *f = XFRAME (frame); |
35f56f96 | 5620 | |
7df02016 KS |
5621 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
5622 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
5623 | 0, 0, safe); | |
4588ec20 JB |
5624 | } |
5625 | } | |
5626 | } | |
5627 | ||
5628 | ||
502b9b64 | 5629 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 5630 | indicate no change is to take place. |
4588ec20 | 5631 | |
59ea14cd PE |
5632 | If DELAY, assume we're being called from a signal handler, and |
5633 | queue the change for later - perhaps the next redisplay. | |
5634 | Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
5635 | from a signal handler. |
5636 | ||
59ea14cd | 5637 | SAFE means this function is called from a place where it's |
b96fd3e8 | 5638 | safe to change frame sizes while a redisplay is in progress. */ |
b6a65ac2 | 5639 | |
dfcf069d | 5640 | void |
59ea14cd PE |
5641 | change_frame_size (struct frame *f, int newheight, int newwidth, |
5642 | bool pretend, bool delay, bool safe) | |
45140e01 RS |
5643 | { |
5644 | Lisp_Object tail, frame; | |
3826ea1a | 5645 | |
9628b887 | 5646 | if (FRAME_MSDOS_P (f)) |
45140e01 | 5647 | { |
9628b887 KL |
5648 | /* On MS-DOS, all frames use the same screen, so a change in |
5649 | size affects all frames. Termcap now supports multiple | |
5650 | ttys. */ | |
45140e01 | 5651 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 5652 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 5653 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 5654 | pretend, delay, safe); |
45140e01 RS |
5655 | } |
5656 | else | |
b96fd3e8 | 5657 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
5658 | } |
5659 | ||
5660 | static void | |
59ea14cd PE |
5661 | change_frame_size_1 (struct frame *f, int newheight, int newwidth, |
5662 | bool pretend, bool delay, bool safe) | |
4588ec20 | 5663 | { |
7df02016 | 5664 | int new_frame_total_cols; |
d311d28c | 5665 | ptrdiff_t count = SPECPDL_INDEX (); |
3826ea1a | 5666 | |
4588ec20 | 5667 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 5668 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 5669 | { |
7df02016 KS |
5670 | f->new_text_lines = newheight; |
5671 | f->new_text_cols = newwidth; | |
4588ec20 JB |
5672 | delayed_size_change = 1; |
5673 | return; | |
5674 | } | |
5675 | ||
502b9b64 | 5676 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
5677 | f->new_text_lines = 0; |
5678 | f->new_text_cols = 0; | |
b6a65ac2 | 5679 | |
08f7aa3e | 5680 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 5681 | if (newheight == 0) |
7df02016 | 5682 | newheight = FRAME_LINES (f); |
ae19c6f2 | 5683 | if (newwidth == 0) |
7df02016 | 5684 | newwidth = FRAME_COLS (f); |
3826ea1a | 5685 | |
3b95a6f9 | 5686 | /* Compute width of windows in F. */ |
b6a65ac2 | 5687 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 5688 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 | 5689 | |
3b95a6f9 MR |
5690 | /* This is the width of the frame with vertical scroll bars and fringe |
5691 | columns. Do this after rounding - see discussion of bug#9723. */ | |
5692 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); | |
5693 | ||
b6a65ac2 | 5694 | /* If we're not changing the frame size, quit now. */ |
3b95a6f9 MR |
5695 | /* Frame width may be unchanged but the text portion may change, for |
5696 | example, fullscreen and remove/add scroll bar. */ | |
7df02016 | 5697 | if (newheight == FRAME_LINES (f) |
3b95a6f9 MR |
5698 | /* Text portion unchanged? */ |
5699 | && newwidth == FRAME_COLS (f) | |
5700 | /* Frame width unchanged? */ | |
5701 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) | |
4588ec20 JB |
5702 | return; |
5703 | ||
cbb95688 RS |
5704 | BLOCK_INPUT; |
5705 | ||
886a8a6c KH |
5706 | #ifdef MSDOS |
5707 | /* We only can set screen dimensions to certain values supported | |
5708 | by our video hardware. Try to find the smallest size greater | |
5709 | or equal to the requested dimensions. */ | |
5710 | dos_set_window_size (&newheight, &newwidth); | |
5711 | #endif | |
5712 | ||
7df02016 | 5713 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 5714 | { |
562dd5e9 | 5715 | resize_frame_windows (f, newheight, 0); |
b6a65ac2 | 5716 | |
48e482e6 EZ |
5717 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5718 | manipulating video hardware. */ | |
5719 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5720 | FrameRows (FRAME_TTY (f)) = newheight; |
4588ec20 JB |
5721 | } |
5722 | ||
7df02016 | 5723 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 5724 | { |
562dd5e9 | 5725 | resize_frame_windows (f, new_frame_total_cols, 1); |
4588ec20 | 5726 | |
48e482e6 EZ |
5727 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5728 | manipulating video hardware. */ | |
5729 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5730 | FrameCols (FRAME_TTY (f)) = newwidth; |
5f5c8ee5 | 5731 | |
e69b0960 | 5732 | if (WINDOWP (f->tool_bar_window)) |
e8c17b81 | 5733 | wset_total_cols (XWINDOW (f->tool_bar_window), make_number (newwidth)); |
4588ec20 JB |
5734 | } |
5735 | ||
7df02016 KS |
5736 | FRAME_LINES (f) = newheight; |
5737 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 5738 | |
5f5c8ee5 GM |
5739 | { |
5740 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
5741 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 5742 | |
5f5c8ee5 GM |
5743 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
5744 | &text_area_height); | |
5745 | if (w->cursor.x >= text_area_x + text_area_width) | |
5746 | w->cursor.hpos = w->cursor.x = 0; | |
5747 | if (w->cursor.y >= text_area_y + text_area_height) | |
5748 | w->cursor.vpos = w->cursor.y = 0; | |
5749 | } | |
986e61b8 | 5750 | |
5f5c8ee5 | 5751 | adjust_glyphs (f); |
5f5c8ee5 | 5752 | calculate_costs (f); |
cb02fa39 GM |
5753 | SET_FRAME_GARBAGED (f); |
5754 | f->resized_p = 1; | |
97cf50e7 RS |
5755 | |
5756 | UNBLOCK_INPUT; | |
61730a69 | 5757 | |
66322887 | 5758 | record_unwind_current_buffer (); |
e523f7e5 | 5759 | |
ef264c42 | 5760 | run_window_configuration_change_hook (f); |
e523f7e5 RS |
5761 | |
5762 | unbind_to (count, Qnil); | |
4588ec20 | 5763 | } |
5f5c8ee5 GM |
5764 | |
5765 | ||
4588ec20 | 5766 | \f |
5f5c8ee5 GM |
5767 | /*********************************************************************** |
5768 | Terminal Related Lisp Functions | |
5769 | ***********************************************************************/ | |
5770 | ||
5771 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 5772 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
5773 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
5774 | FILE = nil means just close any termscript file currently open. */) | |
5842a27b | 5775 | (Lisp_Object file) |
5f5c8ee5 | 5776 | { |
0b0d3e0b KL |
5777 | struct tty_display_info *tty; |
5778 | ||
7d2f1216 EZ |
5779 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ()) |
5780 | && ! FRAME_MSDOS_P (SELECTED_FRAME ())) | |
0b0d3e0b KL |
5781 | error ("Current frame is not on a tty device"); |
5782 | ||
5783 | tty = CURTTY (); | |
5784 | ||
5785 | if (tty->termscript != 0) | |
e18c7093 KL |
5786 | { |
5787 | BLOCK_INPUT; | |
0b0d3e0b | 5788 | fclose (tty->termscript); |
e18c7093 KL |
5789 | UNBLOCK_INPUT; |
5790 | } | |
0b0d3e0b | 5791 | tty->termscript = 0; |
5f5c8ee5 GM |
5792 | |
5793 | if (! NILP (file)) | |
5794 | { | |
5795 | file = Fexpand_file_name (file, Qnil); | |
42a5b22f | 5796 | tty->termscript = fopen (SSDATA (file), "w"); |
0b0d3e0b | 5797 | if (tty->termscript == 0) |
5f5c8ee5 GM |
5798 | report_file_error ("Opening termscript", Fcons (file, Qnil)); |
5799 | } | |
5800 | return Qnil; | |
5801 | } | |
5802 | ||
5803 | ||
4588ec20 | 5804 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
62af879c | 5805 | Ssend_string_to_terminal, 1, 2, 0, |
7ee72033 | 5806 | doc: /* Send STRING to the terminal without alteration. |
62af879c KL |
5807 | Control characters in STRING will have terminal-dependent effects. |
5808 | ||
6ed8eeff | 5809 | Optional parameter TERMINAL specifies the tty terminal device to use. |
558759e4 AM |
5810 | It may be a terminal object, a frame, or nil for the terminal used by |
5811 | the currently selected frame. In batch mode, STRING is sent to stdout | |
5812 | when TERMINAL is nil. */) | |
5842a27b | 5813 | (Lisp_Object string, Lisp_Object terminal) |
4588ec20 | 5814 | { |
7cef7ce3 SM |
5815 | struct terminal *t = get_terminal (terminal, 1); |
5816 | FILE *out; | |
0b0d3e0b | 5817 | |
94f3db62 | 5818 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 5819 | CHECK_STRING (string); |
2c1e4409 | 5820 | BLOCK_INPUT; |
0b0d3e0b | 5821 | |
6ed8eeff KL |
5822 | if (!t) |
5823 | error ("Unknown terminal device"); | |
0b0d3e0b | 5824 | |
7cef7ce3 SM |
5825 | if (t->type == output_initial) |
5826 | out = stdout; | |
5827 | else if (t->type != output_termcap && t->type != output_msdos_raw) | |
5828 | error ("Device %d is not a termcap terminal device", t->id); | |
5829 | else | |
5830 | { | |
5831 | struct tty_display_info *tty = t->display_info.tty; | |
3fc809e2 | 5832 | |
7cef7ce3 SM |
5833 | if (! tty->output) |
5834 | error ("Terminal is currently suspended"); | |
cecfdea6 | 5835 | |
7cef7ce3 SM |
5836 | if (tty->termscript) |
5837 | { | |
5838 | fwrite (SDATA (string), 1, SBYTES (string), tty->termscript); | |
5839 | fflush (tty->termscript); | |
5840 | } | |
5841 | out = tty->output; | |
4588ec20 | 5842 | } |
7cef7ce3 SM |
5843 | fwrite (SDATA (string), 1, SBYTES (string), out); |
5844 | fflush (out); | |
2c1e4409 | 5845 | UNBLOCK_INPUT; |
4588ec20 JB |
5846 | return Qnil; |
5847 | } | |
5848 | ||
5f5c8ee5 | 5849 | |
a7ca3326 | 5850 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 5851 | doc: /* Beep, or flash the screen. |
228299fa | 5852 | Also, unless an argument is given, |
7ee72033 | 5853 | terminate any keyboard macro currently executing. */) |
5842a27b | 5854 | (Lisp_Object arg) |
4588ec20 | 5855 | { |
efb859b4 | 5856 | if (!NILP (arg)) |
4588ec20 | 5857 | { |
7fa788da RS |
5858 | if (noninteractive) |
5859 | putchar (07); | |
5860 | else | |
385ed61f | 5861 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5862 | } |
5863 | else | |
5864 | bitch_at_user (); | |
5865 | ||
5866 | return Qnil; | |
5867 | } | |
5868 | ||
dfcf069d | 5869 | void |
971de7fb | 5870 | bitch_at_user (void) |
4588ec20 JB |
5871 | { |
5872 | if (noninteractive) | |
5873 | putchar (07); | |
5f5c8ee5 | 5874 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
4588ec20 JB |
5875 | error ("Keyboard macro terminated by a command ringing the bell"); |
5876 | else | |
385ed61f | 5877 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5878 | } |
5879 | ||
5f5c8ee5 GM |
5880 | |
5881 | \f | |
5882 | /*********************************************************************** | |
5883 | Sleeping, Waiting | |
5884 | ***********************************************************************/ | |
5885 | ||
a7ca3326 | 5886 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 5887 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
5888 | SECONDS may be a floating-point value, meaning that you can wait for a |
5889 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
d35af63c | 5890 | additional wait period, in milliseconds; this is for backwards compatibility. |
7ee72033 | 5891 | \(Not all operating systems support waiting for a fraction of a second.) */) |
5842a27b | 5892 | (Lisp_Object seconds, Lisp_Object milliseconds) |
4588ec20 | 5893 | { |
d311d28c | 5894 | double duration = extract_float (seconds); |
4588ec20 | 5895 | |
d311d28c PE |
5896 | if (!NILP (milliseconds)) |
5897 | { | |
5898 | CHECK_NUMBER (milliseconds); | |
5899 | duration += XINT (milliseconds) / 1000.0; | |
5900 | } | |
b07646f5 | 5901 | |
d35af63c PE |
5902 | if (0 < duration) |
5903 | { | |
5904 | EMACS_TIME t = EMACS_TIME_FROM_DOUBLE (duration); | |
f1dd8073 | 5905 | wait_reading_process_output (min (EMACS_SECS (t), WAIT_READING_MAX), |
d35af63c PE |
5906 | EMACS_NSECS (t), 0, 0, Qnil, NULL, 0); |
5907 | } | |
4588ec20 JB |
5908 | |
5909 | return Qnil; | |
5910 | } | |
5911 | ||
5f5c8ee5 | 5912 | |
dcd1ca45 | 5913 | /* This is just like wait_reading_process_output, except that |
902b9b6d | 5914 | it does redisplay. |
f76475ad | 5915 | |
2bcac766 CY |
5916 | TIMEOUT is number of seconds to wait (float or integer), |
5917 | or t to wait forever. | |
59ea14cd | 5918 | READING is true if reading input. |
902b9b6d KS |
5919 | If DO_DISPLAY is >0 display process output while waiting. |
5920 | If DO_DISPLAY is >1 perform an initial redisplay before waiting. | |
5921 | */ | |
4588ec20 | 5922 | |
f76475ad | 5923 | Lisp_Object |
59ea14cd | 5924 | sit_for (Lisp_Object timeout, bool reading, int do_display) |
f76475ad | 5925 | { |
d35af63c PE |
5926 | intmax_t sec; |
5927 | int nsec; | |
f222369e | 5928 | |
902b9b6d | 5929 | swallow_events (do_display); |
ccddf474 | 5930 | |
902b9b6d | 5931 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 5932 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 5933 | return Qnil; |
4588ec20 | 5934 | |
902b9b6d KS |
5935 | if (do_display >= 2) |
5936 | redisplay_preserve_echo_area (2); | |
5937 | ||
d35af63c | 5938 | if (INTEGERP (timeout)) |
2bcac766 | 5939 | { |
d35af63c PE |
5940 | sec = XINT (timeout); |
5941 | if (! (0 < sec)) | |
5942 | return Qt; | |
5943 | nsec = 0; | |
2bcac766 | 5944 | } |
d35af63c | 5945 | else if (FLOATP (timeout)) |
d311d28c | 5946 | { |
d35af63c PE |
5947 | double seconds = XFLOAT_DATA (timeout); |
5948 | if (! (0 < seconds)) | |
d311d28c | 5949 | return Qt; |
d35af63c PE |
5950 | else |
5951 | { | |
5952 | EMACS_TIME t = EMACS_TIME_FROM_DOUBLE (seconds); | |
f1dd8073 | 5953 | sec = min (EMACS_SECS (t), WAIT_READING_MAX); |
d35af63c PE |
5954 | nsec = EMACS_NSECS (t); |
5955 | } | |
5956 | } | |
5957 | else if (EQ (timeout, Qt)) | |
5958 | { | |
5959 | sec = 0; | |
5960 | nsec = 0; | |
d311d28c | 5961 | } |
d35af63c PE |
5962 | else |
5963 | wrong_type_argument (Qnumberp, timeout); | |
5964 | ||
dfdb645c | 5965 | |
4588ec20 | 5966 | #ifdef SIGIO |
8fc798e9 | 5967 | gobble_input (0); |
f76475ad JB |
5968 | #endif |
5969 | ||
d35af63c | 5970 | wait_reading_process_output (sec, nsec, reading ? -1 : 1, do_display, |
dcd1ca45 | 5971 | Qnil, NULL, 0); |
f76475ad | 5972 | |
4588ec20 JB |
5973 | return detect_input_pending () ? Qnil : Qt; |
5974 | } | |
5975 | ||
5f5c8ee5 | 5976 | |
a7ca3326 | 5977 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
025de85b CY |
5978 | doc: /* Perform redisplay. |
5979 | Optional arg FORCE, if non-nil, prevents redisplay from being | |
5980 | preempted by arriving input, even if `redisplay-dont-pause' is nil. | |
5981 | If `redisplay-dont-pause' is non-nil (the default), redisplay is never | |
5982 | preempted by arriving input, so FORCE does nothing. | |
5983 | ||
5984 | Return t if redisplay was performed, nil if redisplay was preempted | |
5985 | immediately by pending input. */) | |
5842a27b | 5986 | (Lisp_Object force) |
f76475ad | 5987 | { |
d311d28c | 5988 | ptrdiff_t count; |
659d9874 | 5989 | |
902b9b6d KS |
5990 | swallow_events (1); |
5991 | if ((detect_input_pending_run_timers (1) | |
01327edf | 5992 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
5993 | || !NILP (Vexecuting_kbd_macro)) |
5994 | return Qnil; | |
f76475ad | 5995 | |
01327edf KS |
5996 | count = SPECPDL_INDEX (); |
5997 | if (!NILP (force) && !redisplay_dont_pause) | |
5998 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 5999 | redisplay_preserve_echo_area (2); |
01327edf | 6000 | unbind_to (count, Qnil); |
7ba07a1a | 6001 | return Qt; |
f76475ad | 6002 | } |
5f5c8ee5 GM |
6003 | |
6004 | ||
6005 | \f | |
6006 | /*********************************************************************** | |
6007 | Other Lisp Functions | |
6008 | ***********************************************************************/ | |
6009 | ||
6010 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
6011 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 6012 | buffer-modified-flags. */ |
5f5c8ee5 GM |
6013 | |
6014 | static Lisp_Object frame_and_buffer_state; | |
6015 | ||
6016 | ||
6017 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 6018 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 6019 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
6020 | VARIABLE is a variable name whose value is either nil or a state vector |
6021 | that will be updated to contain all frames and buffers, | |
228299fa | 6022 | aside from buffers whose names start with space, |
44edd521 RS |
6023 | along with the buffers' read-only and modified flags. This allows a fast |
6024 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 6025 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
6026 | the current state. |
6027 | ||
6028 | If VARIABLE is nil, an internal variable is used. Users should not | |
6029 | pass nil for VARIABLE. */) | |
5842a27b | 6030 | (Lisp_Object variable) |
5f5c8ee5 | 6031 | { |
44edd521 | 6032 | Lisp_Object state, tail, frame, buf; |
086ca913 | 6033 | ptrdiff_t n, idx; |
5f5c8ee5 | 6034 | |
44edd521 RS |
6035 | if (! NILP (variable)) |
6036 | { | |
6037 | CHECK_SYMBOL (variable); | |
6038 | state = Fsymbol_value (variable); | |
6039 | if (! VECTORP (state)) | |
6040 | goto changed; | |
6041 | } | |
6042 | else | |
6043 | state = frame_and_buffer_state; | |
6044 | ||
086ca913 | 6045 | idx = 0; |
5f5c8ee5 GM |
6046 | FOR_EACH_FRAME (tail, frame) |
6047 | { | |
086ca913 | 6048 | if (idx == ASIZE (state)) |
44edd521 | 6049 | goto changed; |
086ca913 | 6050 | if (!EQ (AREF (state, idx++), frame)) |
5f5c8ee5 | 6051 | goto changed; |
086ca913 | 6052 | if (idx == ASIZE (state)) |
44edd521 | 6053 | goto changed; |
086ca913 | 6054 | if (!EQ (AREF (state, idx++), XFRAME (frame)->name)) |
5f5c8ee5 GM |
6055 | goto changed; |
6056 | } | |
44edd521 | 6057 | /* Check that the buffer info matches. */ |
7539e11f | 6058 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6059 | { |
7539e11f | 6060 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6061 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 6062 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 6063 | continue; |
086ca913 | 6064 | if (idx == ASIZE (state)) |
44edd521 | 6065 | goto changed; |
086ca913 | 6066 | if (!EQ (AREF (state, idx++), buf)) |
5f5c8ee5 | 6067 | goto changed; |
086ca913 | 6068 | if (idx == ASIZE (state)) |
44edd521 | 6069 | goto changed; |
086ca913 | 6070 | if (!EQ (AREF (state, idx++), BVAR (XBUFFER (buf), read_only))) |
5f5c8ee5 | 6071 | goto changed; |
086ca913 | 6072 | if (idx == ASIZE (state)) |
44edd521 | 6073 | goto changed; |
086ca913 | 6074 | if (!EQ (AREF (state, idx++), Fbuffer_modified_p (buf))) |
5f5c8ee5 GM |
6075 | goto changed; |
6076 | } | |
086ca913 | 6077 | if (idx == ASIZE (state)) |
44edd521 | 6078 | goto changed; |
5f5c8ee5 | 6079 | /* Detect deletion of a buffer at the end of the list. */ |
086ca913 | 6080 | if (EQ (AREF (state, idx), Qlambda)) |
5f5c8ee5 | 6081 | return Qnil; |
44edd521 RS |
6082 | |
6083 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 6084 | changed: |
44edd521 RS |
6085 | /* Count the size we will need. |
6086 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
6087 | n = 1; |
6088 | FOR_EACH_FRAME (tail, frame) | |
6089 | n += 2; | |
7539e11f | 6090 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6091 | n += 3; |
44edd521 RS |
6092 | /* Reallocate the vector if data has grown to need it, |
6093 | or if it has shrunk a lot. */ | |
6094 | if (! VECTORP (state) | |
77b37c05 PE |
6095 | || n > ASIZE (state) |
6096 | || n + 20 < ASIZE (state) / 2) | |
5f5c8ee5 | 6097 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
6098 | { |
6099 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
6100 | if (! NILP (variable)) | |
6101 | Fset (variable, state); | |
6102 | else | |
6103 | frame_and_buffer_state = state; | |
6104 | } | |
6105 | ||
6106 | /* Record the new data in the (possibly reallocated) vector. */ | |
086ca913 | 6107 | idx = 0; |
5f5c8ee5 GM |
6108 | FOR_EACH_FRAME (tail, frame) |
6109 | { | |
086ca913 DA |
6110 | ASET (state, idx, frame); |
6111 | idx++; | |
6112 | ASET (state, idx, XFRAME (frame)->name); | |
6113 | idx++; | |
5f5c8ee5 | 6114 | } |
7539e11f | 6115 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6116 | { |
7539e11f | 6117 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6118 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 6119 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 6120 | continue; |
086ca913 DA |
6121 | ASET (state, idx, buf); |
6122 | idx++; | |
6123 | ASET (state, idx, BVAR (XBUFFER (buf), read_only)); | |
6124 | idx++; | |
6125 | ASET (state, idx, Fbuffer_modified_p (buf)); | |
6126 | idx++; | |
5f5c8ee5 GM |
6127 | } |
6128 | /* Fill up the vector with lambdas (always at least one). */ | |
086ca913 DA |
6129 | ASET (state, idx, Qlambda); |
6130 | idx++; | |
6131 | while (idx < ASIZE (state)) | |
6132 | { | |
6133 | ASET (state, idx, Qlambda); | |
6134 | idx++; | |
6135 | } | |
5f5c8ee5 | 6136 | /* Make sure we didn't overflow the vector. */ |
086ca913 | 6137 | eassert (idx <= ASIZE (state)); |
5f5c8ee5 GM |
6138 | return Qt; |
6139 | } | |
6140 | ||
6141 | ||
4588ec20 | 6142 | \f |
5f5c8ee5 GM |
6143 | /*********************************************************************** |
6144 | Initialization | |
6145 | ***********************************************************************/ | |
6146 | ||
5f5c8ee5 GM |
6147 | /* Initialization done when Emacs fork is started, before doing stty. |
6148 | Determine terminal type and set terminal_driver. Then invoke its | |
6149 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 6150 | |
dfcf069d | 6151 | void |
971de7fb | 6152 | init_display (void) |
4588ec20 | 6153 | { |
28d440ab KL |
6154 | char *terminal_type; |
6155 | ||
5f5c8ee5 GM |
6156 | /* Construct the space glyph. */ |
6157 | space_glyph.type = CHAR_GLYPH; | |
3fc809e2 | 6158 | SET_CHAR_GLYPH (space_glyph, ' ', DEFAULT_FACE_ID, 0); |
5f5c8ee5 GM |
6159 | space_glyph.charpos = -1; |
6160 | ||
4588ec20 JB |
6161 | inverse_video = 0; |
6162 | cursor_in_echo_area = 0; | |
6163 | terminal_type = (char *) 0; | |
6164 | ||
1315c181 JB |
6165 | /* Now is the time to initialize this; it's used by init_sys_modes |
6166 | during startup. */ | |
2246281f | 6167 | Vinitial_window_system = Qnil; |
4588ec20 | 6168 | |
4181ad9c KL |
6169 | /* SIGWINCH needs to be handled no matter what display we start |
6170 | with. Otherwise newly opened tty frames will not resize | |
6171 | automatically. */ | |
6172 | #ifdef SIGWINCH | |
6173 | #ifndef CANNOT_DUMP | |
6174 | if (initialized) | |
6175 | #endif /* CANNOT_DUMP */ | |
6176 | signal (SIGWINCH, window_change_signal); | |
6177 | #endif /* SIGWINCH */ | |
4588ec20 | 6178 | |
d6ef42b9 | 6179 | /* If running as a daemon, no need to initialize any frames/terminal. */ |
ff808935 DN |
6180 | if (IS_DAEMON) |
6181 | return; | |
d6ef42b9 | 6182 | |
1315c181 JB |
6183 | /* If the user wants to use a window system, we shouldn't bother |
6184 | initializing the terminal. This is especially important when the | |
6185 | terminal is so dumb that emacs gives up before and doesn't bother | |
6186 | using the window system. | |
4588ec20 | 6187 | |
36bbad1d KH |
6188 | If the DISPLAY environment variable is set and nonempty, |
6189 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6190 | |
6191 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 6192 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 6193 | { |
36bbad1d | 6194 | char *display; |
36bbad1d | 6195 | display = getenv ("DISPLAY"); |
36bbad1d | 6196 | display_arg = (display != 0 && *display != 0); |
c1fc674b AS |
6197 | |
6198 | if (display_arg && !x_display_ok (display)) | |
6199 | { | |
6200 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
6201 | display); | |
6202 | inhibit_window_system = 1; | |
6203 | } | |
f040093a | 6204 | } |
d460af17 | 6205 | |
4fcc2638 | 6206 | if (!inhibit_window_system && display_arg) |
4588ec20 | 6207 | { |
111d9af3 | 6208 | Vinitial_window_system = Qx; |
4588ec20 JB |
6209 | #ifdef HAVE_X11 |
6210 | Vwindow_system_version = make_number (11); | |
039e5d71 | 6211 | #endif |
9311dcff | 6212 | #ifdef GNU_LINUX |
039e5d71 | 6213 | /* In some versions of ncurses, |
6a428f77 | 6214 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6215 | So call tgetent. */ |
6216 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 | 6217 | #endif |
5f5c8ee5 | 6218 | adjust_frame_glyphs_initially (); |
4588ec20 JB |
6219 | return; |
6220 | } | |
6221 | #endif /* HAVE_X_WINDOWS */ | |
6222 | ||
fd2e066a | 6223 | #ifdef HAVE_NTGUI |
177c0ea7 | 6224 | if (!inhibit_window_system) |
fd2e066a | 6225 | { |
111d9af3 | 6226 | Vinitial_window_system = Qw32; |
fd2e066a | 6227 | Vwindow_system_version = make_number (1); |
5f5c8ee5 | 6228 | adjust_frame_glyphs_initially (); |
fd2e066a GV |
6229 | return; |
6230 | } | |
6231 | #endif /* HAVE_NTGUI */ | |
6232 | ||
edfda783 AR |
6233 | #ifdef HAVE_NS |
6234 | if (!inhibit_window_system | |
6235 | #ifndef CANNOT_DUMP | |
6236 | && initialized | |
6237 | #endif | |
6238 | ) | |
6239 | { | |
111d9af3 | 6240 | Vinitial_window_system = Qns; |
5e617bc2 | 6241 | Vwindow_system_version = make_number (10); |
edfda783 AR |
6242 | adjust_frame_glyphs_initially (); |
6243 | return; | |
6244 | } | |
6245 | #endif | |
6246 | ||
4588ec20 JB |
6247 | /* If no window system has been specified, try to use the terminal. */ |
6248 | if (! isatty (0)) | |
6249 | { | |
1559a86d | 6250 | fatal ("standard input is not a tty"); |
4588ec20 JB |
6251 | exit (1); |
6252 | } | |
6253 | ||
6152361f JR |
6254 | #ifdef WINDOWSNT |
6255 | terminal_type = "w32console"; | |
6256 | #else | |
153a073c | 6257 | /* Look at the TERM variable. */ |
4588ec20 | 6258 | terminal_type = (char *) getenv ("TERM"); |
6152361f | 6259 | #endif |
4588ec20 JB |
6260 | if (!terminal_type) |
6261 | { | |
5d12ff0b | 6262 | #ifdef HAVE_WINDOW_SYSTEM |
b9e590fc RS |
6263 | if (! inhibit_window_system) |
6264 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6265 | else |
6266 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6267 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
4588ec20 JB |
6268 | exit (1); |
6269 | } | |
6270 | ||
0a125897 | 6271 | { |
6ed8eeff | 6272 | struct terminal *t; |
3224dac1 KL |
6273 | struct frame *f = XFRAME (selected_frame); |
6274 | ||
6275 | /* Open a display on the controlling tty. */ | |
6ed8eeff | 6276 | t = init_tty (0, terminal_type, 1); /* Errors are fatal. */ |
3224dac1 KL |
6277 | |
6278 | /* Convert the initial frame to use the new display. */ | |
b04f5ad2 | 6279 | if (f->output_method != output_initial) |
1088b922 | 6280 | emacs_abort (); |
6ed8eeff KL |
6281 | f->output_method = t->type; |
6282 | f->terminal = t; | |
3224dac1 | 6283 | |
6ed8eeff | 6284 | t->reference_count++; |
7ac5dac9 EZ |
6285 | #ifdef MSDOS |
6286 | f->output_data.tty->display_info = &the_only_display_info; | |
6287 | #else | |
6288 | if (f->output_method == output_termcap) | |
6289 | create_tty_output (f); | |
6290 | #endif | |
6ed8eeff | 6291 | t->display_info.tty->top_frame = selected_frame; |
5b65d888 | 6292 | change_frame_size (XFRAME (selected_frame), |
6ed8eeff KL |
6293 | FrameRows (t->display_info.tty), |
6294 | FrameCols (t->display_info.tty), 0, 0, 1); | |
3224dac1 | 6295 | |
6ed8eeff KL |
6296 | /* Delete the initial terminal. */ |
6297 | if (--initial_terminal->reference_count == 0 | |
6298 | && initial_terminal->delete_terminal_hook) | |
6299 | (*initial_terminal->delete_terminal_hook) (initial_terminal); | |
2666355c KL |
6300 | |
6301 | /* Update frame parameters to reflect the new type. */ | |
6302 | Fmodify_frame_parameters | |
6303 | (selected_frame, Fcons (Fcons (Qtty_type, | |
6ed8eeff | 6304 | Ftty_type (selected_frame)), Qnil)); |
657ceaa0 EZ |
6305 | if (t->display_info.tty->name) |
6306 | Fmodify_frame_parameters (selected_frame, | |
6307 | Fcons (Fcons (Qtty, build_string (t->display_info.tty->name)), | |
6308 | Qnil)); | |
6309 | else | |
6310 | Fmodify_frame_parameters (selected_frame, Fcons (Fcons (Qtty, Qnil), | |
6311 | Qnil)); | |
0a125897 | 6312 | } |
3fc809e2 | 6313 | |
d86c299a | 6314 | { |
91fb7e1b | 6315 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6316 | int width = FRAME_TOTAL_COLS (sf); |
6317 | int height = FRAME_LINES (sf); | |
d86c299a | 6318 | |
5f5c8ee5 | 6319 | /* If these sizes are so big they cause overflow, just ignore the |
dfd153ae PE |
6320 | change. It's not clear what better we could do. The rest of |
6321 | the code assumes that (width + 2) * height * sizeof (struct glyph) | |
6322 | does not overflow and does not exceed PTRDIFF_MAX or SIZE_MAX. */ | |
e3c25c68 PE |
6323 | if (INT_ADD_RANGE_OVERFLOW (width, 2, INT_MIN, INT_MAX) |
6324 | || INT_MULTIPLY_RANGE_OVERFLOW (width + 2, height, INT_MIN, INT_MAX) | |
dfd153ae PE |
6325 | || (min (PTRDIFF_MAX, SIZE_MAX) / sizeof (struct glyph) |
6326 | < (width + 2) * height)) | |
1559a86d | 6327 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6328 | } |
6329 | ||
5f5c8ee5 | 6330 | adjust_frame_glyphs_initially (); |
91fb7e1b | 6331 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6332 | |
5f5c8ee5 GM |
6333 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ |
6334 | if (initialized | |
6335 | && !noninteractive | |
2246281f | 6336 | && NILP (Vinitial_window_system)) |
2d764c78 EZ |
6337 | { |
6338 | /* For the initial frame, we don't have any way of knowing what | |
6339 | are the foreground and background colors of the terminal. */ | |
5e617bc2 | 6340 | struct frame *sf = SELECTED_FRAME (); |
2d764c78 | 6341 | |
f9d2fdc4 EZ |
6342 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
6343 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
6344 | call0 (intern ("tty-set-up-initial-frame-faces")); |
6345 | } | |
5f5c8ee5 GM |
6346 | } |
6347 | ||
6348 | ||
6349 | \f | |
6350 | /*********************************************************************** | |
6351 | Blinking cursor | |
6352 | ***********************************************************************/ | |
6353 | ||
c3f13540 | 6354 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 6355 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 6356 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
6357 | WINDOW nil means use the selected window. SHOW non-nil means |
6358 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 | 6359 | don't show a cursor. */) |
5842a27b | 6360 | (Lisp_Object window, Lisp_Object show) |
5f5c8ee5 | 6361 | { |
5f5c8ee5 GM |
6362 | /* Don't change cursor state while redisplaying. This could confuse |
6363 | output routines. */ | |
6364 | if (!redisplaying_p) | |
6365 | { | |
6366 | if (NILP (window)) | |
6367 | window = selected_window; | |
6368 | else | |
b7826503 | 6369 | CHECK_WINDOW (window); |
177c0ea7 | 6370 | |
5d7791b3 | 6371 | XWINDOW (window)->cursor_off_p = NILP (show); |
5f5c8ee5 GM |
6372 | } |
6373 | ||
6374 | return Qnil; | |
4588ec20 | 6375 | } |
5f5c8ee5 GM |
6376 | |
6377 | ||
5d7791b3 GM |
6378 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
6379 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 6380 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 | 6381 | WINDOW nil or omitted means report on the selected window. */) |
5842a27b | 6382 | (Lisp_Object window) |
5d7791b3 GM |
6383 | { |
6384 | struct window *w; | |
177c0ea7 | 6385 | |
5d7791b3 GM |
6386 | if (NILP (window)) |
6387 | window = selected_window; | |
6388 | else | |
b7826503 | 6389 | CHECK_WINDOW (window); |
177c0ea7 | 6390 | |
5d7791b3 | 6391 | w = XWINDOW (window); |
177c0ea7 | 6392 | return w->cursor_off_p ? Qnil : Qt; |
5d7791b3 GM |
6393 | } |
6394 | ||
87478b52 SM |
6395 | DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame, |
6396 | Slast_nonminibuf_frame, 0, 0, 0, | |
6397 | doc: /* Value is last nonminibuffer frame. */) | |
5842a27b | 6398 | (void) |
87478b52 | 6399 | { |
4958ed94 | 6400 | Lisp_Object frame = Qnil; |
87478b52 | 6401 | |
4958ed94 SM |
6402 | if (last_nonminibuf_frame) |
6403 | XSETFRAME (frame, last_nonminibuf_frame); | |
87478b52 SM |
6404 | |
6405 | return frame; | |
6406 | } | |
4588ec20 | 6407 | \f |
5f5c8ee5 GM |
6408 | /*********************************************************************** |
6409 | Initialization | |
6410 | ***********************************************************************/ | |
6411 | ||
dfcf069d | 6412 | void |
971de7fb | 6413 | syms_of_display (void) |
4588ec20 | 6414 | { |
502b9b64 | 6415 | defsubr (&Sredraw_frame); |
4588ec20 | 6416 | defsubr (&Sredraw_display); |
078b3696 | 6417 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
6418 | defsubr (&Sopen_termscript); |
6419 | defsubr (&Sding); | |
7ba07a1a | 6420 | defsubr (&Sredisplay); |
4588ec20 JB |
6421 | defsubr (&Ssleep_for); |
6422 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 6423 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 6424 | defsubr (&Sinternal_show_cursor_p); |
87478b52 | 6425 | defsubr (&Slast_nonminibuf_frame); |
4588ec20 | 6426 | |
e509cfa6 | 6427 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
6428 | defsubr (&Sdump_redisplay_history); |
6429 | #endif | |
6430 | ||
d1dad759 | 6431 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
6432 | staticpro (&frame_and_buffer_state); |
6433 | ||
cd3520a4 JB |
6434 | DEFSYM (Qdisplay_table, "display-table"); |
6435 | DEFSYM (Qredisplay_dont_pause, "redisplay-dont-pause"); | |
9cda4f7c | 6436 | |
29208e82 | 6437 | DEFVAR_INT ("baud-rate", baud_rate, |
025de85b | 6438 | doc: /* The output baud rate of the terminal. |
228299fa GM |
6439 | On most systems, changing this value will affect the amount of padding |
6440 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 6441 | |
29208e82 | 6442 | DEFVAR_BOOL ("inverse-video", inverse_video, |
025de85b | 6443 | doc: /* Non-nil means invert the entire frame display. |
228299fa | 6444 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 6445 | |
29208e82 | 6446 | DEFVAR_BOOL ("visible-bell", visible_bell, |
025de85b | 6447 | doc: /* Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
6448 | |
6449 | See also `ring-bell-function'. */); | |
177c0ea7 | 6450 | |
29208e82 | 6451 | DEFVAR_BOOL ("no-redraw-on-reenter", no_redraw_on_reenter, |
025de85b | 6452 | doc: /* Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
6453 | A non-nil value is useful if the terminal can automatically preserve |
6454 | Emacs's frame display when you reenter Emacs. | |
6455 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 6456 | |
29208e82 | 6457 | DEFVAR_LISP ("initial-window-system", Vinitial_window_system, |
2246281f | 6458 | doc: /* Name of the window system that Emacs uses for the first frame. |
89baa1df EZ |
6459 | The value is a symbol: |
6460 | nil for a termcap frame (a character-only terminal), | |
6461 | 'x' for an Emacs frame that is really an X window, | |
6462 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6463 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6464 | 'pc' for a direct-write MS-DOS frame. | |
6465 | ||
6466 | Use of this variable as a boolean is deprecated. Instead, | |
6467 | use `display-graphic-p' or any of the other `display-*-p' | |
6468 | predicates which report frame's specific UI-related capabilities. */); | |
177c0ea7 | 6469 | |
70b8d0a4 SM |
6470 | DEFVAR_KBOARD ("window-system", Vwindow_system, |
6471 | doc: /* Name of window system through which the selected frame is displayed. | |
89baa1df EZ |
6472 | The value is a symbol: |
6473 | nil for a termcap frame (a character-only terminal), | |
6474 | 'x' for an Emacs frame that is really an X window, | |
6475 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6476 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6477 | 'pc' for a direct-write MS-DOS frame. | |
6478 | ||
6479 | Use of this variable as a boolean is deprecated. Instead, | |
6480 | use `display-graphic-p' or any of the other `display-*-p' | |
6481 | predicates which report frame's specific UI-related capabilities. */); | |
70b8d0a4 | 6482 | |
29208e82 | 6483 | DEFVAR_LISP ("window-system-version", Vwindow_system_version, |
bacf09b4 | 6484 | doc: /* The version number of the window system in use. |
c22140f6 | 6485 | For X windows, this is 11. */); |
177c0ea7 | 6486 | |
29208e82 | 6487 | DEFVAR_BOOL ("cursor-in-echo-area", cursor_in_echo_area, |
bacf09b4 | 6488 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 6489 | |
29208e82 | 6490 | DEFVAR_LISP ("glyph-table", Vglyph_table, |
bacf09b4 | 6491 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
6492 | If not nil, this is a vector indexed by glyph code to define the glyph. |
6493 | Each element can be: | |
6494 | integer: a glyph code which this glyph is an alias for. | |
6495 | string: output this glyph using that string (not impl. in X windows). | |
6496 | nil: this glyph mod 524288 is the code of a character to output, | |
6497 | and this glyph / 524288 is the face number (see `face-id') to use | |
6498 | while outputting it. */); | |
4588ec20 JB |
6499 | Vglyph_table = Qnil; |
6500 | ||
29208e82 | 6501 | DEFVAR_LISP ("standard-display-table", Vstandard_display_table, |
bacf09b4 | 6502 | doc: /* Display table to use for buffers that specify none. |
228299fa | 6503 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
6504 | Vstandard_display_table = Qnil; |
6505 | ||
29208e82 | 6506 | DEFVAR_BOOL ("redisplay-dont-pause", redisplay_dont_pause, |
025de85b | 6507 | doc: /* Non-nil means display update isn't paused when input is detected. */); |
6bf7006f | 6508 | redisplay_dont_pause = 1; |
5f5c8ee5 | 6509 | |
d012c62b | 6510 | #if PERIODIC_PREEMPTION_CHECKING |
29208e82 | 6511 | DEFVAR_LISP ("redisplay-preemption-period", Vredisplay_preemption_period, |
025de85b CY |
6512 | doc: /* Period in seconds between checking for input during redisplay. |
6513 | This has an effect only if `redisplay-dont-pause' is nil; in that | |
6514 | case, arriving input preempts redisplay until the input is processed. | |
6515 | If the value is nil, redisplay is never preempted. */); | |
d012c62b KS |
6516 | Vredisplay_preemption_period = make_float (0.10); |
6517 | #endif | |
6518 | ||
4588ec20 JB |
6519 | #ifdef CANNOT_DUMP |
6520 | if (noninteractive) | |
6521 | #endif | |
6522 | { | |
2246281f | 6523 | Vinitial_window_system = Qnil; |
4588ec20 JB |
6524 | Vwindow_system_version = Qnil; |
6525 | } | |
6526 | } |