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 | ||
565620a5 | 24 | #include <stdio.h> |
dfcf069d | 25 | #include <unistd.h> |
dfcf069d | 26 | |
47099d6f | 27 | #include "lisp.h" |
4588ec20 | 28 | #include "termchar.h" |
a0879520 | 29 | /* cm.h must come after dispextern.h on Windows. */ |
fd2e066a GV |
30 | #include "dispextern.h" |
31 | #include "cm.h" | |
83be827a | 32 | #include "character.h" |
e5560ff7 | 33 | #include "buffer.h" |
d43721a2 | 34 | #include "keyboard.h" |
502b9b64 | 35 | #include "frame.h" |
428a555e | 36 | #include "termhooks.h" |
4588ec20 JB |
37 | #include "window.h" |
38 | #include "commands.h" | |
39 | #include "disptab.h" | |
40 | #include "indent.h" | |
d169fe39 | 41 | #include "intervals.h" |
97cf50e7 | 42 | #include "blockinput.h" |
dfcf069d | 43 | #include "process.h" |
4588ec20 | 44 | |
58b2bb63 | 45 | #include "syssignal.h" |
a41f8bed | 46 | |
17a2cbbd DC |
47 | #ifdef HAVE_WINDOW_SYSTEM |
48 | #include TERM_HEADER | |
49 | #endif /* HAVE_WINDOW_SYSTEM */ | |
edfda783 | 50 | |
5f5c8ee5 | 51 | /* Include systime.h after xterm.h to avoid double inclusion of time.h. */ |
6cbd1643 | 52 | |
5f5c8ee5 | 53 | #include "systime.h" |
3883a901 RS |
54 | #include <errno.h> |
55 | ||
1c6f11f4 | 56 | #ifdef DISPNEW_NEEDS_STDIO_EXT |
68c45bf0 | 57 | #include <stdio_ext.h> |
4588ec20 | 58 | #endif |
c59592b3 | 59 | |
9311dcff | 60 | #if defined (HAVE_TERM_H) && defined (GNU_LINUX) |
fa0ec9f4 DL |
61 | #include <term.h> /* for tgetent */ |
62 | #endif | |
a68089e4 EZ |
63 | |
64 | #ifdef WINDOWSNT | |
65 | #include "w32.h" | |
66 | #endif | |
5f5c8ee5 GM |
67 | \f |
68 | /* Structure to pass dimensions around. Used for character bounding | |
69 | boxes, glyph matrix dimensions and alike. */ | |
70 | ||
71 | struct dim | |
72 | { | |
73 | int width; | |
74 | int height; | |
75 | }; | |
76 | ||
77 | \f | |
78 | /* Function prototypes. */ | |
79 | ||
f57e2426 | 80 | static void update_frame_line (struct frame *, int); |
2f7c71a1 AS |
81 | static int required_matrix_height (struct window *); |
82 | static int required_matrix_width (struct window *); | |
f57e2426 | 83 | static void adjust_frame_glyphs (struct frame *); |
59ea14cd | 84 | static void change_frame_size_1 (struct frame *, int, int, bool, bool, bool); |
d311d28c | 85 | static void increment_row_positions (struct glyph_row *, ptrdiff_t, ptrdiff_t); |
f57e2426 J |
86 | static void fill_up_frame_row_with_spaces (struct glyph_row *, int); |
87 | static void build_frame_matrix_from_window_tree (struct glyph_matrix *, | |
88 | struct window *); | |
89 | static void build_frame_matrix_from_leaf_window (struct glyph_matrix *, | |
90 | struct window *); | |
f57e2426 J |
91 | static void adjust_frame_message_buffer (struct frame *); |
92 | static void adjust_decode_mode_spec_buffer (struct frame *); | |
93 | static void fill_up_glyph_row_with_spaces (struct glyph_row *); | |
59ea14cd | 94 | static void clear_window_matrices (struct window *, bool); |
f57e2426 | 95 | static void fill_up_glyph_row_area_with_spaces (struct glyph_row *, int); |
59ea14cd PE |
96 | static int scrolling_window (struct window *, bool); |
97 | static bool update_window_line (struct window *, int, bool *); | |
f57e2426 | 98 | static void mirror_make_current (struct window *, int); |
e509cfa6 | 99 | #ifdef GLYPH_DEBUG |
f57e2426 J |
100 | static void check_matrix_pointers (struct glyph_matrix *, |
101 | struct glyph_matrix *); | |
b96fd3e8 | 102 | #endif |
f57e2426 | 103 | static void mirror_line_dance (struct window *, int, int, int *, char *); |
59ea14cd PE |
104 | static bool update_window_tree (struct window *, bool); |
105 | static bool update_window (struct window *, bool); | |
106 | static bool update_frame_1 (struct frame *, bool, bool); | |
107 | static bool scrolling (struct frame *); | |
f57e2426 | 108 | static void set_window_cursor_after_update (struct window *); |
f57e2426 J |
109 | static void adjust_frame_glyphs_for_window_redisplay (struct frame *); |
110 | static void adjust_frame_glyphs_for_frame_redisplay (struct frame *); | |
5f5c8ee5 | 111 | |
5f5c8ee5 | 112 | \f |
d012c62b KS |
113 | /* Redisplay preemption timers. */ |
114 | ||
115 | static EMACS_TIME preemption_period; | |
116 | static EMACS_TIME preemption_next_check; | |
117 | ||
59ea14cd | 118 | /* True upon entry to redisplay means do not assume anything about |
502b9b64 | 119 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 120 | |
59ea14cd | 121 | bool frame_garbaged; |
4588ec20 | 122 | |
59ea14cd | 123 | /* True means last display completed. False means it was preempted. */ |
4588ec20 | 124 | |
59ea14cd | 125 | bool display_completed; |
4588ec20 | 126 | |
e7067d00 | 127 | Lisp_Object Qdisplay_table, Qredisplay_dont_pause; |
5f5c8ee5 | 128 | |
4588ec20 | 129 | \f |
5f5c8ee5 | 130 | /* The currently selected frame. In a single-frame version, this |
91fb7e1b | 131 | variable always equals the_only_frame. */ |
4588ec20 | 132 | |
91fb7e1b | 133 | Lisp_Object selected_frame; |
4588ec20 | 134 | |
5f5c8ee5 | 135 | /* A frame which is not just a mini-buffer, or 0 if there are no such |
502b9b64 | 136 | frames. This is usually the most recent such frame that was |
87485d6f MW |
137 | selected. In a single-frame version, this variable always holds |
138 | the address of the_only_frame. */ | |
4588ec20 | 139 | |
5f5c8ee5 | 140 | struct frame *last_nonminibuf_frame; |
d52bad65 | 141 | |
59ea14cd | 142 | /* True means SIGWINCH happened when not safe. */ |
4588ec20 | 143 | |
59ea14cd | 144 | static bool delayed_size_change; |
4588ec20 | 145 | |
5f5c8ee5 | 146 | /* 1 means glyph initialization has been completed at startup. */ |
4588ec20 | 147 | |
59ea14cd | 148 | static bool glyphs_initialized_initially_p; |
4588ec20 | 149 | |
5f5c8ee5 | 150 | /* Updated window if != 0. Set by update_window. */ |
4588ec20 | 151 | |
5f5c8ee5 | 152 | struct window *updated_window; |
4588ec20 | 153 | |
5f5c8ee5 | 154 | /* Glyph row updated in update_window_line, and area that is updated. */ |
4588ec20 | 155 | |
5f5c8ee5 GM |
156 | struct glyph_row *updated_row; |
157 | int updated_area; | |
4588ec20 | 158 | |
5f5c8ee5 | 159 | /* A glyph for a space. */ |
4588ec20 | 160 | |
5f5c8ee5 | 161 | struct glyph space_glyph; |
4588ec20 | 162 | |
5f5c8ee5 GM |
163 | /* Counts of allocated structures. These counts serve to diagnose |
164 | memory leaks and double frees. */ | |
4588ec20 | 165 | |
5bf46f05 PE |
166 | static int glyph_matrix_count; |
167 | static int glyph_pool_count; | |
4588ec20 | 168 | |
5f5c8ee5 GM |
169 | /* If non-null, the frame whose frame matrices are manipulated. If |
170 | null, window matrices are worked on. */ | |
4588ec20 | 171 | |
5f5c8ee5 | 172 | static struct frame *frame_matrix_frame; |
4588ec20 | 173 | |
59ea14cd | 174 | /* True means that fonts have been loaded since the last glyph |
5f5c8ee5 | 175 | matrix adjustments. Redisplay must stop, and glyph matrices must |
59ea14cd | 176 | be adjusted when this flag becomes true during display. The |
5f5c8ee5 | 177 | reason fonts can be loaded so late is that fonts of fontsets are |
3aa9f0c4 KH |
178 | loaded on demand. Another reason is that a line contains many |
179 | characters displayed by zero width or very narrow glyphs of | |
180 | variable-width fonts. */ | |
836d2cde | 181 | |
59ea14cd | 182 | bool fonts_changed_p; |
836d2cde | 183 | |
177c0ea7 | 184 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 185 | This may only be used for terminal frames. */ |
836d2cde | 186 | |
e509cfa6 | 187 | #ifdef GLYPH_DEBUG |
4588ec20 | 188 | |
f57e2426 J |
189 | static int window_to_frame_vpos (struct window *, int); |
190 | static int window_to_frame_hpos (struct window *, int); | |
5f5c8ee5 GM |
191 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) |
192 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 193 | |
9b0e97aa GM |
194 | /* One element of the ring buffer containing redisplay history |
195 | information. */ | |
196 | ||
197 | struct redisplay_history | |
198 | { | |
199 | char trace[512 + 100]; | |
200 | }; | |
201 | ||
202 | /* The size of the history buffer. */ | |
203 | ||
204 | #define REDISPLAY_HISTORY_SIZE 30 | |
205 | ||
206 | /* The redisplay history buffer. */ | |
207 | ||
208 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
209 | ||
210 | /* Next free entry in redisplay_history. */ | |
211 | ||
212 | static int history_idx; | |
213 | ||
214 | /* A tick that's incremented each time something is added to the | |
215 | history. */ | |
216 | ||
dfd153ae | 217 | static uprintmax_t history_tick; |
6a8aec41 | 218 | \f |
9b0e97aa GM |
219 | /* Add to the redisplay history how window W has been displayed. |
220 | MSG is a trace containing the information how W's glyph matrix | |
59ea14cd | 221 | has been constructed. PAUSED_P means that the update |
9b0e97aa GM |
222 | has been interrupted for pending input. */ |
223 | ||
224 | static void | |
59ea14cd | 225 | add_window_display_history (struct window *w, const char *msg, bool paused_p) |
9b0e97aa GM |
226 | { |
227 | char *buf; | |
177c0ea7 | 228 | |
9b0e97aa GM |
229 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
230 | history_idx = 0; | |
231 | buf = redisplay_history[history_idx].trace; | |
232 | ++history_idx; | |
177c0ea7 | 233 | |
8666506e PE |
234 | snprintf (buf, sizeof redisplay_history[0].trace, |
235 | "%"pMu": window %p (`%s')%s\n%s", | |
236 | history_tick++, | |
237 | w, | |
d3d50620 DA |
238 | ((BUFFERP (w->buffer) |
239 | && STRINGP (BVAR (XBUFFER (w->buffer), name))) | |
240 | ? SSDATA (BVAR (XBUFFER (w->buffer), name)) | |
8666506e PE |
241 | : "???"), |
242 | paused_p ? " ***paused***" : "", | |
243 | msg); | |
9b0e97aa GM |
244 | } |
245 | ||
246 | ||
247 | /* Add to the redisplay history that frame F has been displayed. | |
59ea14cd | 248 | PAUSED_P means that the update has been interrupted for |
9b0e97aa GM |
249 | pending input. */ |
250 | ||
251 | static void | |
59ea14cd | 252 | add_frame_display_history (struct frame *f, bool paused_p) |
9b0e97aa GM |
253 | { |
254 | char *buf; | |
177c0ea7 | 255 | |
9b0e97aa GM |
256 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
257 | history_idx = 0; | |
258 | buf = redisplay_history[history_idx].trace; | |
259 | ++history_idx; | |
177c0ea7 | 260 | |
dfd153ae | 261 | sprintf (buf, "%"pMu": update frame %p%s", |
9b0e97aa GM |
262 | history_tick++, |
263 | f, paused_p ? " ***paused***" : ""); | |
264 | } | |
265 | ||
266 | ||
a7ca3326 | 267 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, |
9b0e97aa | 268 | Sdump_redisplay_history, 0, 0, "", |
7ee72033 | 269 | doc: /* Dump redisplay history to stderr. */) |
5842a27b | 270 | (void) |
9b0e97aa GM |
271 | { |
272 | int i; | |
273 | ||
274 | for (i = history_idx - 1; i != history_idx; --i) | |
275 | { | |
276 | if (i < 0) | |
277 | i = REDISPLAY_HISTORY_SIZE - 1; | |
278 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
279 | } | |
280 | ||
281 | return Qnil; | |
282 | } | |
283 | ||
284 | ||
e509cfa6 | 285 | #else /* not GLYPH_DEBUG */ |
4588ec20 | 286 | |
7df02016 KS |
287 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
288 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 289 | |
e509cfa6 | 290 | #endif /* GLYPH_DEBUG */ |
4588ec20 | 291 | |
4588ec20 | 292 | |
9e4bf381 PE |
293 | #if (defined PROFILING \ |
294 | && (defined __FreeBSD__ || defined GNU_LINUX || defined __MINGW32__) \ | |
295 | && !HAVE___EXECUTABLE_START) | |
296 | /* This function comes first in the Emacs executable and is used only | |
297 | to estimate the text start for profiling. */ | |
4588ec20 | 298 | void |
9e4bf381 | 299 | __executable_start (void) |
4588ec20 | 300 | { |
1088b922 | 301 | emacs_abort (); |
177c0ea7 | 302 | } |
72af86bd | 303 | #endif |
5f5c8ee5 GM |
304 | \f |
305 | /*********************************************************************** | |
306 | Glyph Matrices | |
307 | ***********************************************************************/ | |
308 | ||
309 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
310 | pool from which memory for the matrix should be allocated, or null | |
311 | for window-based redisplay where no glyph pools are used. The | |
312 | member `pool' of the glyph matrix structure returned is set to | |
313 | POOL, the structure is otherwise zeroed. */ | |
314 | ||
5bf46f05 | 315 | static struct glyph_matrix * |
971de7fb | 316 | new_glyph_matrix (struct glyph_pool *pool) |
4588ec20 | 317 | { |
23f86fce | 318 | struct glyph_matrix *result = xzalloc (sizeof *result); |
4588ec20 | 319 | |
5f5c8ee5 GM |
320 | /* Increment number of allocated matrices. This count is used |
321 | to detect memory leaks. */ | |
322 | ++glyph_matrix_count; | |
4588ec20 | 323 | |
5f5c8ee5 GM |
324 | /* Set pool and return. */ |
325 | result->pool = pool; | |
326 | return result; | |
4588ec20 JB |
327 | } |
328 | ||
4588ec20 | 329 | |
5f5c8ee5 GM |
330 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
331 | ||
332 | The global counter glyph_matrix_count is decremented when a matrix | |
333 | is freed. If the count gets negative, more structures were freed | |
334 | than allocated, i.e. one matrix was freed more than once or a bogus | |
335 | pointer was passed to this function. | |
177c0ea7 | 336 | |
5f5c8ee5 GM |
337 | If MATRIX->pool is null, this means that the matrix manages its own |
338 | glyph memory---this is done for matrices on X frames. Freeing the | |
339 | matrix also frees the glyph memory in this case. */ | |
340 | ||
341 | static void | |
971de7fb | 342 | free_glyph_matrix (struct glyph_matrix *matrix) |
4588ec20 | 343 | { |
5f5c8ee5 GM |
344 | if (matrix) |
345 | { | |
346 | int i; | |
347 | ||
348 | /* Detect the case that more matrices are freed than were | |
349 | allocated. */ | |
350 | if (--glyph_matrix_count < 0) | |
1088b922 | 351 | emacs_abort (); |
5f5c8ee5 GM |
352 | |
353 | /* Free glyph memory if MATRIX owns it. */ | |
354 | if (matrix->pool == NULL) | |
355 | for (i = 0; i < matrix->rows_allocated; ++i) | |
356 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 357 | |
5f5c8ee5 GM |
358 | /* Free row structures and the matrix itself. */ |
359 | xfree (matrix->rows); | |
360 | xfree (matrix); | |
361 | } | |
362 | } | |
4588ec20 | 363 | |
4588ec20 | 364 | |
5f5c8ee5 GM |
365 | /* Return the number of glyphs to reserve for a marginal area of |
366 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
367 | display line of window W. MARGIN gives the width of the marginal | |
368 | area in canonical character units. MARGIN should be an integer | |
369 | or a float. */ | |
370 | ||
371 | static int | |
971de7fb | 372 | margin_glyphs_to_reserve (struct window *w, int total_glyphs, Lisp_Object margin) |
5f5c8ee5 GM |
373 | { |
374 | int n; | |
4588ec20 | 375 | |
5f5c8ee5 | 376 | if (NUMBERP (margin)) |
4588ec20 | 377 | { |
d3d50620 | 378 | int width = XFASTINT (w->total_cols); |
5f5c8ee5 GM |
379 | double d = max (0, XFLOATINT (margin)); |
380 | d = min (width / 2 - 1, d); | |
35ec832e | 381 | n = (int) ((double) total_glyphs / width * d); |
5f5c8ee5 GM |
382 | } |
383 | else | |
384 | n = 0; | |
385 | ||
386 | return n; | |
387 | } | |
388 | ||
59ea14cd | 389 | /* Return true if ROW's hash value is correct. |
e509cfa6 DA |
390 | Optimized away if ENABLE_CHECKING is not defined. */ |
391 | ||
59ea14cd | 392 | static bool |
7a7270dd EZ |
393 | verify_row_hash (struct glyph_row *row) |
394 | { | |
015137db | 395 | return row->hash == row_hash (row); |
7a7270dd | 396 | } |
4588ec20 | 397 | |
5f5c8ee5 GM |
398 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
399 | window sizes. | |
4588ec20 | 400 | |
5f5c8ee5 GM |
401 | W is null if the function is called for a frame glyph matrix. |
402 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
403 | indices of the first column and row of MATRIX within the frame | |
404 | matrix, if such a matrix exists. They are zero for purely | |
405 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 406 | |
5f5c8ee5 GM |
407 | In window-based redisplay, where no frame matrices exist, glyph |
408 | matrices manage their own glyph storage. Otherwise, they allocate | |
409 | storage from a common frame glyph pool which can be found in | |
410 | MATRIX->pool. | |
23b0200c | 411 | |
5f5c8ee5 GM |
412 | The reason for this memory management strategy is to avoid complete |
413 | frame redraws if possible. When we allocate from a common pool, a | |
414 | change of the location or size of a sub-matrix within the pool | |
415 | requires a complete redisplay of the frame because we cannot easily | |
416 | make sure that the current matrices of all windows still agree with | |
417 | what is displayed on the screen. While this is usually fast, it | |
418 | leads to screen flickering. */ | |
23b0200c | 419 | |
5f5c8ee5 | 420 | static void |
971de7fb | 421 | adjust_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int x, int y, struct dim dim) |
5f5c8ee5 GM |
422 | { |
423 | int i; | |
424 | int new_rows; | |
59ea14cd PE |
425 | bool marginal_areas_changed_p = 0; |
426 | bool header_line_changed_p = 0; | |
427 | bool header_line_p = 0; | |
5f5c8ee5 | 428 | int left = -1, right = -1; |
ca8a12a7 | 429 | int window_width = -1, window_height = -1; |
5f5c8ee5 | 430 | |
6b61353c KH |
431 | /* See if W had a header line that has disappeared now, or vice versa. |
432 | Get W's size. */ | |
5f5c8ee5 GM |
433 | if (w) |
434 | { | |
6b61353c KH |
435 | window_box (w, -1, 0, 0, &window_width, &window_height); |
436 | ||
045dee35 GM |
437 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
438 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 439 | } |
045dee35 | 440 | matrix->header_line_p = header_line_p; |
23b0200c | 441 | |
6b61353c KH |
442 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
443 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
444 | haven't changed. This optimization is important because preserving |
445 | the matrix means preventing redisplay. */ | |
446 | if (matrix->pool == NULL) | |
447 | { | |
d3d50620 DA |
448 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
449 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
a54e2c05 | 450 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
451 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs |
452 | || right != matrix->right_margin_glyphs); | |
453 | ||
454 | if (!marginal_areas_changed_p | |
455 | && !fonts_changed_p | |
045dee35 | 456 | && !header_line_changed_p |
7df02016 KS |
457 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
458 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
459 | && matrix->window_height == window_height |
460 | && matrix->window_vscroll == w->vscroll | |
461 | && matrix->window_width == window_width) | |
462 | return; | |
463 | } | |
177c0ea7 | 464 | |
5f5c8ee5 GM |
465 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
466 | if (matrix->rows_allocated < dim.height) | |
467 | { | |
0065d054 | 468 | int old_alloc = matrix->rows_allocated; |
5f5c8ee5 | 469 | new_rows = dim.height - matrix->rows_allocated; |
0065d054 PE |
470 | matrix->rows = xpalloc (matrix->rows, &matrix->rows_allocated, |
471 | new_rows, INT_MAX, sizeof *matrix->rows); | |
472 | memset (matrix->rows + old_alloc, 0, | |
473 | (matrix->rows_allocated - old_alloc) * sizeof *matrix->rows); | |
5f5c8ee5 GM |
474 | } |
475 | else | |
476 | new_rows = 0; | |
60a8948a | 477 | |
5f5c8ee5 GM |
478 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
479 | on a frame not using window-based redisplay. Set up pointers for | |
480 | each row into the glyph pool. */ | |
481 | if (matrix->pool) | |
482 | { | |
a54e2c05 | 483 | eassert (matrix->pool->glyphs); |
177c0ea7 | 484 | |
5f5c8ee5 | 485 | if (w) |
60a8948a | 486 | { |
5f5c8ee5 | 487 | left = margin_glyphs_to_reserve (w, dim.width, |
d3d50620 | 488 | w->left_margin_cols); |
5f5c8ee5 | 489 | right = margin_glyphs_to_reserve (w, dim.width, |
d3d50620 | 490 | w->right_margin_cols); |
60a8948a | 491 | } |
5f5c8ee5 GM |
492 | else |
493 | left = right = 0; | |
177c0ea7 | 494 | |
5f5c8ee5 | 495 | for (i = 0; i < dim.height; ++i) |
60a8948a | 496 | { |
5f5c8ee5 | 497 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
498 | |
499 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
500 | = (matrix->pool->glyphs |
501 | + (y + i) * matrix->pool->ncolumns | |
502 | + x); | |
177c0ea7 | 503 | |
5f5c8ee5 GM |
504 | if (w == NULL |
505 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 506 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
507 | { |
508 | row->glyphs[TEXT_AREA] | |
509 | = row->glyphs[LEFT_MARGIN_AREA]; | |
510 | row->glyphs[RIGHT_MARGIN_AREA] | |
511 | = row->glyphs[TEXT_AREA] + dim.width; | |
512 | row->glyphs[LAST_AREA] | |
513 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
514 | } | |
515 | else | |
516 | { | |
517 | row->glyphs[TEXT_AREA] | |
518 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
519 | row->glyphs[RIGHT_MARGIN_AREA] | |
520 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
521 | row->glyphs[LAST_AREA] | |
522 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
523 | } | |
60a8948a | 524 | } |
177c0ea7 | 525 | |
5f5c8ee5 GM |
526 | matrix->left_margin_glyphs = left; |
527 | matrix->right_margin_glyphs = right; | |
528 | } | |
529 | else | |
530 | { | |
531 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
6b61353c KH |
532 | its own memory. It is a window matrix for window-based redisplay. |
533 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
534 | if (dim.width > matrix->matrix_w |
535 | || new_rows | |
045dee35 | 536 | || header_line_changed_p |
5f5c8ee5 | 537 | || marginal_areas_changed_p) |
4588ec20 | 538 | { |
5f5c8ee5 GM |
539 | struct glyph_row *row = matrix->rows; |
540 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 541 | |
5f5c8ee5 GM |
542 | while (row < end) |
543 | { | |
544 | row->glyphs[LEFT_MARGIN_AREA] | |
0065d054 PE |
545 | = xnrealloc (row->glyphs[LEFT_MARGIN_AREA], |
546 | dim.width, sizeof (struct glyph)); | |
177c0ea7 | 547 | |
5f5c8ee5 GM |
548 | /* The mode line never has marginal areas. */ |
549 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 550 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
551 | { |
552 | row->glyphs[TEXT_AREA] | |
553 | = row->glyphs[LEFT_MARGIN_AREA]; | |
554 | row->glyphs[RIGHT_MARGIN_AREA] | |
555 | = row->glyphs[TEXT_AREA] + dim.width; | |
556 | row->glyphs[LAST_AREA] | |
557 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
558 | } | |
559 | else | |
560 | { | |
561 | row->glyphs[TEXT_AREA] | |
562 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
563 | row->glyphs[RIGHT_MARGIN_AREA] | |
564 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
565 | row->glyphs[LAST_AREA] | |
566 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
567 | } | |
568 | ++row; | |
569 | } | |
4588ec20 JB |
570 | } |
571 | ||
a54e2c05 | 572 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
573 | matrix->left_margin_glyphs = left; |
574 | matrix->right_margin_glyphs = right; | |
575 | } | |
177c0ea7 | 576 | |
5f5c8ee5 GM |
577 | /* Number of rows to be used by MATRIX. */ |
578 | matrix->nrows = dim.height; | |
a54e2c05 | 579 | eassert (matrix->nrows >= 0); |
5f5c8ee5 | 580 | |
b7b20fbd | 581 | if (w) |
5f5c8ee5 | 582 | { |
b7b20fbd | 583 | if (matrix == w->current_matrix) |
4588ec20 | 584 | { |
b7b20fbd GM |
585 | /* Mark rows in a current matrix of a window as not having |
586 | valid contents. It's important to not do this for | |
587 | desired matrices. When Emacs starts, it may already be | |
588 | building desired matrices when this function runs. */ | |
589 | if (window_width < 0) | |
590 | window_width = window_box_width (w, -1); | |
177c0ea7 | 591 | |
b7b20fbd GM |
592 | /* Optimize the case that only the height has changed (C-x 2, |
593 | upper window). Invalidate all rows that are no longer part | |
594 | of the window. */ | |
595 | if (!marginal_areas_changed_p | |
73d75a62 GM |
596 | && !header_line_changed_p |
597 | && new_rows == 0 | |
598 | && dim.width == matrix->matrix_w | |
7df02016 KS |
599 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
600 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 601 | && matrix->window_width == window_width) |
b7b20fbd | 602 | { |
dd42b31a GM |
603 | /* Find the last row in the window. */ |
604 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
605 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
606 | { | |
26447967 | 607 | ++i; |
dd42b31a GM |
608 | break; |
609 | } | |
b7b20fbd GM |
610 | |
611 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 612 | are invalidated below. */ |
d3d50620 DA |
613 | if (INTEGERP (w->window_end_vpos) |
614 | && XFASTINT (w->window_end_vpos) >= i) | |
e8c17b81 | 615 | wset_window_end_valid (w, Qnil); |
177c0ea7 | 616 | |
b7b20fbd GM |
617 | while (i < matrix->nrows) |
618 | matrix->rows[i++].enabled_p = 0; | |
619 | } | |
620 | else | |
621 | { | |
622 | for (i = 0; i < matrix->nrows; ++i) | |
623 | matrix->rows[i].enabled_p = 0; | |
624 | } | |
5f5c8ee5 | 625 | } |
b7b20fbd | 626 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 627 | { |
b7b20fbd GM |
628 | /* Rows in desired matrices always have to be cleared; |
629 | redisplay expects this is the case when it runs, so it | |
630 | had better be the case when we adjust matrices between | |
631 | redisplays. */ | |
5f5c8ee5 GM |
632 | for (i = 0; i < matrix->nrows; ++i) |
633 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 634 | } |
4588ec20 | 635 | } |
177c0ea7 JB |
636 | |
637 | ||
5f5c8ee5 GM |
638 | /* Remember last values to be able to optimize frame redraws. */ |
639 | matrix->matrix_x = x; | |
640 | matrix->matrix_y = y; | |
641 | matrix->matrix_w = dim.width; | |
642 | matrix->matrix_h = dim.height; | |
643 | ||
644 | /* Record the top y location and height of W at the time the matrix | |
645 | was last adjusted. This is used to optimize redisplay above. */ | |
646 | if (w) | |
4588ec20 | 647 | { |
7df02016 KS |
648 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
649 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
650 | matrix->window_height = window_height; |
651 | matrix->window_width = window_width; | |
652 | matrix->window_vscroll = w->vscroll; | |
653 | } | |
654 | } | |
4588ec20 | 655 | |
4588ec20 | 656 | |
5f5c8ee5 GM |
657 | /* Reverse the contents of rows in MATRIX between START and END. The |
658 | contents of the row at END - 1 end up at START, END - 2 at START + | |
659 | 1 etc. This is part of the implementation of rotate_matrix (see | |
660 | below). */ | |
d52bad65 | 661 | |
5f5c8ee5 | 662 | static void |
971de7fb | 663 | reverse_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 GM |
664 | { |
665 | int i, j; | |
23b0200c | 666 | |
5f5c8ee5 GM |
667 | for (i = start, j = end - 1; i < j; ++i, --j) |
668 | { | |
669 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
670 | initialization. */ | |
671 | struct glyph_row temp; | |
672 | temp = matrix->rows[i]; | |
673 | matrix->rows[i] = matrix->rows[j]; | |
674 | matrix->rows[j] = temp; | |
675 | } | |
676 | } | |
23b0200c | 677 | |
23b0200c | 678 | |
5f5c8ee5 GM |
679 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
680 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
681 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
682 | row structures are moved around). | |
60a8948a | 683 | |
5f5c8ee5 GM |
684 | The algorithm used for rotating the vector was, I believe, first |
685 | described by Kernighan. See the vector R as consisting of two | |
686 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
687 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
688 | and reverse the result to get (ArBr)r which is BA. Similar for | |
689 | rotating right. */ | |
690 | ||
691 | void | |
971de7fb | 692 | rotate_matrix (struct glyph_matrix *matrix, int first, int last, int by) |
5f5c8ee5 GM |
693 | { |
694 | if (by < 0) | |
695 | { | |
696 | /* Up (rotate left, i.e. towards lower indices). */ | |
697 | by = -by; | |
698 | reverse_rows (matrix, first, first + by); | |
699 | reverse_rows (matrix, first + by, last); | |
700 | reverse_rows (matrix, first, last); | |
701 | } | |
702 | else if (by > 0) | |
703 | { | |
704 | /* Down (rotate right, i.e. towards higher indices). */ | |
705 | reverse_rows (matrix, last - by, last); | |
706 | reverse_rows (matrix, first, last - by); | |
707 | reverse_rows (matrix, first, last); | |
708 | } | |
709 | } | |
710 | ||
711 | ||
712 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
713 | with indices START <= index < END. Increment positions by DELTA/ | |
714 | DELTA_BYTES. */ | |
715 | ||
716 | void | |
ace1712c | 717 | increment_matrix_positions (struct glyph_matrix *matrix, int start, int end, |
d311d28c | 718 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
719 | { |
720 | /* Check that START and END are reasonable values. */ | |
a54e2c05 DA |
721 | eassert (start >= 0 && start <= matrix->nrows); |
722 | eassert (end >= 0 && end <= matrix->nrows); | |
723 | eassert (start <= end); | |
5f5c8ee5 GM |
724 | |
725 | for (; start < end; ++start) | |
86c11ba1 | 726 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
727 | } |
728 | ||
729 | ||
59ea14cd PE |
730 | /* Clear the enable_p flags in a range of rows in glyph matrix MATRIX. |
731 | START and END are the row indices of the first and last + 1 row to clear. */ | |
5f5c8ee5 GM |
732 | |
733 | void | |
59ea14cd | 734 | clear_glyph_matrix_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 | 735 | { |
a54e2c05 DA |
736 | eassert (start <= end); |
737 | eassert (start >= 0 && start < matrix->nrows); | |
738 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 739 | |
5f5c8ee5 | 740 | for (; start < end; ++start) |
59ea14cd | 741 | matrix->rows[start].enabled_p = 0; |
5f5c8ee5 GM |
742 | } |
743 | ||
744 | ||
745 | /* Clear MATRIX. | |
746 | ||
59ea14cd PE |
747 | Empty all rows in MATRIX by clearing their enabled_p flags. |
748 | The function prepare_desired_row will eventually really clear a row | |
749 | when it sees one with a false enabled_p flag. | |
5f5c8ee5 | 750 | |
59ea14cd | 751 | Reset update hints to default values. The only update hint |
5f5c8ee5 GM |
752 | currently present is the flag MATRIX->no_scrolling_p. */ |
753 | ||
754 | void | |
971de7fb | 755 | clear_glyph_matrix (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
756 | { |
757 | if (matrix) | |
758 | { | |
59ea14cd | 759 | clear_glyph_matrix_rows (matrix, 0, matrix->nrows); |
5f5c8ee5 GM |
760 | matrix->no_scrolling_p = 0; |
761 | } | |
762 | } | |
177c0ea7 | 763 | |
5f5c8ee5 GM |
764 | |
765 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
766 | Increment y-positions in glyph rows between START and END by DY, | |
767 | and recompute their visible height. */ | |
768 | ||
769 | void | |
971de7fb | 770 | shift_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int start, int end, int dy) |
5f5c8ee5 GM |
771 | { |
772 | int min_y, max_y; | |
177c0ea7 | 773 | |
a54e2c05 DA |
774 | eassert (start <= end); |
775 | eassert (start >= 0 && start < matrix->nrows); | |
776 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 777 | |
7df02016 KS |
778 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
779 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 780 | |
5f5c8ee5 GM |
781 | for (; start < end; ++start) |
782 | { | |
783 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 784 | |
5f5c8ee5 | 785 | row->y += dy; |
d6c747a4 | 786 | row->visible_height = row->height; |
177c0ea7 | 787 | |
5f5c8ee5 | 788 | if (row->y < min_y) |
d6c747a4 GM |
789 | row->visible_height -= min_y - row->y; |
790 | if (row->y + row->height > max_y) | |
791 | row->visible_height -= row->y + row->height - max_y; | |
e61124cd YM |
792 | if (row->fringe_bitmap_periodic_p) |
793 | row->redraw_fringe_bitmaps_p = 1; | |
5f5c8ee5 GM |
794 | } |
795 | } | |
796 | ||
797 | ||
798 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
799 | invalid is done by setting enabled_p to zero for all rows in a | |
800 | current matrix. */ | |
801 | ||
802 | void | |
971de7fb | 803 | clear_current_matrices (register struct frame *f) |
5f5c8ee5 GM |
804 | { |
805 | /* Clear frame current matrix, if we have one. */ | |
806 | if (f->current_matrix) | |
807 | clear_glyph_matrix (f->current_matrix); | |
808 | ||
809 | /* Clear the matrix of the menu bar window, if such a window exists. | |
810 | The menu bar window is currently used to display menus on X when | |
811 | no toolkit support is compiled in. */ | |
e69b0960 DA |
812 | if (WINDOWP (f->menu_bar_window)) |
813 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
5f5c8ee5 | 814 | |
9ea173e8 | 815 | /* Clear the matrix of the tool-bar window, if any. */ |
e69b0960 DA |
816 | if (WINDOWP (f->tool_bar_window)) |
817 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
5f5c8ee5 GM |
818 | |
819 | /* Clear current window matrices. */ | |
a54e2c05 | 820 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
821 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); |
822 | } | |
823 | ||
824 | ||
825 | /* Clear out all display lines of F for a coming redisplay. */ | |
826 | ||
827 | void | |
971de7fb | 828 | clear_desired_matrices (register struct frame *f) |
5f5c8ee5 GM |
829 | { |
830 | if (f->desired_matrix) | |
831 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 832 | |
e69b0960 DA |
833 | if (WINDOWP (f->menu_bar_window)) |
834 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
5f5c8ee5 | 835 | |
e69b0960 DA |
836 | if (WINDOWP (f->tool_bar_window)) |
837 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
5f5c8ee5 GM |
838 | |
839 | /* Do it for window matrices. */ | |
a54e2c05 | 840 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
841 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); |
842 | } | |
843 | ||
844 | ||
59ea14cd PE |
845 | /* Clear matrices in window tree rooted in W. If DESIRED_P, |
846 | clear desired matrices, otherwise clear current matrices. */ | |
5f5c8ee5 GM |
847 | |
848 | static void | |
59ea14cd | 849 | clear_window_matrices (struct window *w, bool desired_p) |
5f5c8ee5 GM |
850 | { |
851 | while (w) | |
852 | { | |
d3d50620 | 853 | if (!NILP (w->hchild)) |
5f5c8ee5 | 854 | { |
d3d50620 DA |
855 | eassert (WINDOWP (w->hchild)); |
856 | clear_window_matrices (XWINDOW (w->hchild), desired_p); | |
5f5c8ee5 | 857 | } |
d3d50620 | 858 | else if (!NILP (w->vchild)) |
5f5c8ee5 | 859 | { |
d3d50620 DA |
860 | eassert (WINDOWP (w->vchild)); |
861 | clear_window_matrices (XWINDOW (w->vchild), desired_p); | |
5f5c8ee5 GM |
862 | } |
863 | else | |
864 | { | |
865 | if (desired_p) | |
866 | clear_glyph_matrix (w->desired_matrix); | |
867 | else | |
868 | { | |
869 | clear_glyph_matrix (w->current_matrix); | |
e8c17b81 | 870 | wset_window_end_valid (w, Qnil); |
5f5c8ee5 GM |
871 | } |
872 | } | |
873 | ||
d3d50620 | 874 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
875 | } |
876 | } | |
877 | ||
878 | ||
879 | \f | |
880 | /*********************************************************************** | |
881 | Glyph Rows | |
882 | ||
883 | See dispextern.h for an overall explanation of glyph rows. | |
884 | ***********************************************************************/ | |
885 | ||
886 | /* Clear glyph row ROW. Do it in a way that makes it robust against | |
887 | changes in the glyph_row structure, i.e. addition or removal of | |
888 | structure members. */ | |
889 | ||
2cca872d KH |
890 | static struct glyph_row null_row; |
891 | ||
5f5c8ee5 | 892 | void |
971de7fb | 893 | clear_glyph_row (struct glyph_row *row) |
5f5c8ee5 GM |
894 | { |
895 | struct glyph *p[1 + LAST_AREA]; | |
5f5c8ee5 GM |
896 | |
897 | /* Save pointers. */ | |
898 | p[LEFT_MARGIN_AREA] = row->glyphs[LEFT_MARGIN_AREA]; | |
899 | p[TEXT_AREA] = row->glyphs[TEXT_AREA]; | |
900 | p[RIGHT_MARGIN_AREA] = row->glyphs[RIGHT_MARGIN_AREA]; | |
901 | p[LAST_AREA] = row->glyphs[LAST_AREA]; | |
902 | ||
903 | /* Clear. */ | |
904 | *row = null_row; | |
905 | ||
906 | /* Restore pointers. */ | |
907 | row->glyphs[LEFT_MARGIN_AREA] = p[LEFT_MARGIN_AREA]; | |
908 | row->glyphs[TEXT_AREA] = p[TEXT_AREA]; | |
909 | row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA]; | |
910 | row->glyphs[LAST_AREA] = p[LAST_AREA]; | |
45560b1a GM |
911 | |
912 | #if 0 /* At some point, some bit-fields of struct glyph were not set, | |
913 | which made glyphs unequal when compared with GLYPH_EQUAL_P. | |
914 | Redisplay outputs such glyphs, and flickering effects were | |
915 | the result. This also depended on the contents of memory | |
916 | returned by xmalloc. If flickering happens again, activate | |
153a073c | 917 | the code below. If the flickering is gone with that, chances |
45560b1a | 918 | are that the flickering has the same reason as here. */ |
72af86bd | 919 | memset (p[0], 0, (char *) p[LAST_AREA] - (char *) p[0]); |
45560b1a | 920 | #endif |
5f5c8ee5 GM |
921 | } |
922 | ||
923 | ||
924 | /* Make ROW an empty, enabled row of canonical character height, | |
925 | in window W starting at y-position Y. */ | |
926 | ||
927 | void | |
971de7fb | 928 | blank_row (struct window *w, struct glyph_row *row, int y) |
5f5c8ee5 GM |
929 | { |
930 | int min_y, max_y; | |
177c0ea7 | 931 | |
7df02016 KS |
932 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
933 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 934 | |
5f5c8ee5 GM |
935 | clear_glyph_row (row); |
936 | row->y = y; | |
408f5064 | 937 | row->ascent = row->phys_ascent = 0; |
d3d50620 | 938 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 939 | row->visible_height = row->height; |
177c0ea7 | 940 | |
5f5c8ee5 | 941 | if (row->y < min_y) |
d6c747a4 GM |
942 | row->visible_height -= min_y - row->y; |
943 | if (row->y + row->height > max_y) | |
944 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
945 | |
946 | row->enabled_p = 1; | |
947 | } | |
948 | ||
949 | ||
950 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
951 | are the amounts by which to change positions. Note that the first | |
952 | glyph of the text area of a row can have a buffer position even if | |
953 | the used count of the text area is zero. Such rows display line | |
954 | ends. */ | |
955 | ||
5bf46f05 | 956 | static void |
ace1712c | 957 | increment_row_positions (struct glyph_row *row, |
d311d28c | 958 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
959 | { |
960 | int area, i; | |
961 | ||
962 | /* Increment start and end positions. */ | |
963 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
964 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
965 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
966 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
d36fe237 EZ |
967 | CHARPOS (row->start.pos) += delta; |
968 | BYTEPOS (row->start.pos) += delta_bytes; | |
969 | CHARPOS (row->end.pos) += delta; | |
970 | BYTEPOS (row->end.pos) += delta_bytes; | |
5f5c8ee5 | 971 | |
5cacdcfd KS |
972 | if (!row->enabled_p) |
973 | return; | |
974 | ||
5f5c8ee5 GM |
975 | /* Increment positions in glyphs. */ |
976 | for (area = 0; area < LAST_AREA; ++area) | |
977 | for (i = 0; i < row->used[area]; ++i) | |
978 | if (BUFFERP (row->glyphs[area][i].object) | |
979 | && row->glyphs[area][i].charpos > 0) | |
980 | row->glyphs[area][i].charpos += delta; | |
981 | ||
982 | /* Capture the case of rows displaying a line end. */ | |
983 | if (row->used[TEXT_AREA] == 0 | |
984 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
985 | row->glyphs[TEXT_AREA]->charpos += delta; | |
986 | } | |
987 | ||
988 | ||
9af3e742 | 989 | #if 0 |
5f5c8ee5 GM |
990 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
991 | contents, i.e. glyph structure contents are exchanged between A and | |
992 | B without changing glyph pointers in A and B. */ | |
993 | ||
994 | static void | |
1dae0f0a | 995 | swap_glyphs_in_rows (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
996 | { |
997 | int area; | |
998 | ||
999 | for (area = 0; area < LAST_AREA; ++area) | |
1000 | { | |
1001 | /* Number of glyphs to swap. */ | |
1002 | int max_used = max (a->used[area], b->used[area]); | |
1003 | ||
1004 | /* Start of glyphs in area of row A. */ | |
1005 | struct glyph *glyph_a = a->glyphs[area]; | |
1006 | ||
1007 | /* End + 1 of glyphs in area of row A. */ | |
1008 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
1009 | ||
1010 | /* Start of glyphs in area of row B. */ | |
1011 | struct glyph *glyph_b = b->glyphs[area]; | |
1012 | ||
1013 | while (glyph_a < glyph_a_end) | |
1014 | { | |
1015 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
1016 | initialization. */ | |
1017 | struct glyph temp; | |
1018 | temp = *glyph_a; | |
1019 | *glyph_a = *glyph_b; | |
1020 | *glyph_b = temp; | |
1021 | ++glyph_a; | |
1022 | ++glyph_b; | |
1023 | } | |
1024 | } | |
1025 | } | |
1026 | ||
9af3e742 | 1027 | #endif /* 0 */ |
5f5c8ee5 | 1028 | |
015137db EZ |
1029 | /* Exchange pointers to glyph memory between glyph rows A and B. Also |
1030 | exchange the used[] array and the hash values of the rows, because | |
1031 | these should all go together for the row's hash value to be | |
1032 | correct. */ | |
5f5c8ee5 | 1033 | |
b0ab8123 | 1034 | static void |
971de7fb | 1035 | swap_glyph_pointers (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1036 | { |
1037 | int i; | |
015137db EZ |
1038 | unsigned hash_tem = a->hash; |
1039 | ||
5f5c8ee5 GM |
1040 | for (i = 0; i < LAST_AREA + 1; ++i) |
1041 | { | |
1042 | struct glyph *temp = a->glyphs[i]; | |
015137db | 1043 | |
5f5c8ee5 GM |
1044 | a->glyphs[i] = b->glyphs[i]; |
1045 | b->glyphs[i] = temp; | |
73055685 EZ |
1046 | if (i < LAST_AREA) |
1047 | { | |
1048 | short used_tem = a->used[i]; | |
1049 | ||
1050 | a->used[i] = b->used[i]; | |
1051 | b->used[i] = used_tem; | |
1052 | } | |
5f5c8ee5 | 1053 | } |
015137db EZ |
1054 | a->hash = b->hash; |
1055 | b->hash = hash_tem; | |
5f5c8ee5 GM |
1056 | } |
1057 | ||
1058 | ||
1059 | /* Copy glyph row structure FROM to glyph row structure TO, except | |
015137db EZ |
1060 | that glyph pointers, the `used' counts, and the hash values in the |
1061 | structures are left unchanged. */ | |
5f5c8ee5 | 1062 | |
b0ab8123 | 1063 | static void |
971de7fb | 1064 | copy_row_except_pointers (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1065 | { |
1066 | struct glyph *pointers[1 + LAST_AREA]; | |
73055685 | 1067 | short used[LAST_AREA]; |
015137db | 1068 | unsigned hashval; |
5f5c8ee5 GM |
1069 | |
1070 | /* Save glyph pointers of TO. */ | |
72af86bd | 1071 | memcpy (pointers, to->glyphs, sizeof to->glyphs); |
015137db EZ |
1072 | memcpy (used, to->used, sizeof to->used); |
1073 | hashval = to->hash; | |
5f5c8ee5 GM |
1074 | |
1075 | /* Do a structure assignment. */ | |
1076 | *to = *from; | |
1077 | ||
1078 | /* Restore original pointers of TO. */ | |
72af86bd | 1079 | memcpy (to->glyphs, pointers, sizeof to->glyphs); |
015137db EZ |
1080 | memcpy (to->used, used, sizeof to->used); |
1081 | to->hash = hashval; | |
5f5c8ee5 GM |
1082 | } |
1083 | ||
1084 | ||
5f5c8ee5 GM |
1085 | /* Assign glyph row FROM to glyph row TO. This works like a structure |
1086 | assignment TO = FROM, except that glyph pointers are not copied but | |
1087 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1088 | a memory leak. */ | |
1089 | ||
b0ab8123 | 1090 | static void |
971de7fb | 1091 | assign_row (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1092 | { |
1093 | swap_glyph_pointers (to, from); | |
1094 | copy_row_except_pointers (to, from); | |
1095 | } | |
1096 | ||
1097 | ||
1098 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1099 | a row in a window matrix, is a slice of the glyph memory of the | |
1100 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
59ea14cd | 1101 | is true if the glyph memory of WINDOW_ROW is part of the glyph |
5f5c8ee5 GM |
1102 | memory of FRAME_ROW. */ |
1103 | ||
e509cfa6 | 1104 | #ifdef GLYPH_DEBUG |
9339e87f | 1105 | |
59ea14cd | 1106 | static bool |
59fc5cf9 | 1107 | glyph_row_slice_p (struct glyph_row *window_row, struct glyph_row *frame_row) |
5f5c8ee5 GM |
1108 | { |
1109 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1110 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1111 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1112 | ||
1113 | return (frame_glyph_start <= window_glyph_start | |
1114 | && window_glyph_start < frame_glyph_end); | |
1115 | } | |
1116 | ||
9339e87f | 1117 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1118 | |
9af3e742 GM |
1119 | #if 0 |
1120 | ||
5f5c8ee5 GM |
1121 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1122 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1123 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1124 | ||
1125 | static struct glyph_row * | |
59fc5cf9 AS |
1126 | find_glyph_row_slice (struct glyph_matrix *window_matrix, |
1127 | struct glyph_matrix *frame_matrix, int row) | |
5f5c8ee5 GM |
1128 | { |
1129 | int i; | |
1130 | ||
a54e2c05 | 1131 | eassert (row >= 0 && row < frame_matrix->nrows); |
5f5c8ee5 GM |
1132 | |
1133 | for (i = 0; i < window_matrix->nrows; ++i) | |
1134 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1135 | frame_matrix->rows + row)) | |
1136 | break; | |
1137 | ||
1138 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1139 | } | |
1140 | ||
9af3e742 | 1141 | #endif /* 0 */ |
5f5c8ee5 GM |
1142 | |
1143 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1144 | i.e. they are only marked as to be cleared by setting their | |
1145 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1146 | call to this function really clears it. */ | |
1147 | ||
1148 | void | |
971de7fb | 1149 | prepare_desired_row (struct glyph_row *row) |
5f5c8ee5 GM |
1150 | { |
1151 | if (!row->enabled_p) | |
1152 | { | |
59ea14cd | 1153 | bool rp = row->reversed_p; |
5009f85e | 1154 | |
5f5c8ee5 GM |
1155 | clear_glyph_row (row); |
1156 | row->enabled_p = 1; | |
5009f85e | 1157 | row->reversed_p = rp; |
5f5c8ee5 GM |
1158 | } |
1159 | } | |
1160 | ||
1161 | ||
1162 | /* Return a hash code for glyph row ROW. */ | |
1163 | ||
2f7c71a1 | 1164 | static int |
971de7fb | 1165 | line_hash_code (struct glyph_row *row) |
5f5c8ee5 GM |
1166 | { |
1167 | int hash = 0; | |
177c0ea7 | 1168 | |
5f5c8ee5 GM |
1169 | if (row->enabled_p) |
1170 | { | |
4cecaab8 MB |
1171 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1172 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1173 | ||
1174 | while (glyph < end) | |
1175 | { | |
1176 | int c = glyph->u.ch; | |
1177 | int face_id = glyph->face_id; | |
daf01701 | 1178 | if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
4cecaab8 MB |
1179 | c -= SPACEGLYPH; |
1180 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1181 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1182 | ++glyph; | |
1183 | } | |
5f5c8ee5 | 1184 | |
4cecaab8 MB |
1185 | if (hash == 0) |
1186 | hash = 1; | |
5f5c8ee5 GM |
1187 | } |
1188 | ||
1189 | return hash; | |
1190 | } | |
1191 | ||
1192 | ||
153a073c | 1193 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1194 | the number of characters in the line. If must_write_spaces is |
1195 | zero, leading and trailing spaces are ignored. */ | |
1196 | ||
dfd153ae | 1197 | static int |
971de7fb | 1198 | line_draw_cost (struct glyph_matrix *matrix, int vpos) |
5f5c8ee5 GM |
1199 | { |
1200 | struct glyph_row *row = matrix->rows + vpos; | |
1201 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1202 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1203 | int len; | |
1204 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
ca9ce8f2 | 1205 | ptrdiff_t glyph_table_len = GLYPH_TABLE_LENGTH; |
5f5c8ee5 GM |
1206 | |
1207 | /* Ignore trailing and leading spaces if we can. */ | |
daf01701 | 1208 | if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
5f5c8ee5 GM |
1209 | { |
1210 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1211 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1212 | --end; |
1213 | ||
177c0ea7 | 1214 | /* All blank line. */ |
5f5c8ee5 GM |
1215 | if (end == beg) |
1216 | return 0; | |
1217 | ||
1218 | /* Skip over leading spaces. */ | |
1219 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1220 | ++beg; | |
1221 | } | |
1222 | ||
1223 | /* If we don't have a glyph-table, each glyph is one character, | |
1224 | so return the number of glyphs. */ | |
1225 | if (glyph_table_base == 0) | |
1226 | len = end - beg; | |
1227 | else | |
1228 | { | |
1229 | /* Otherwise, scan the glyphs and accumulate their total length | |
1230 | in LEN. */ | |
1231 | len = 0; | |
1232 | while (beg < end) | |
1233 | { | |
3fc809e2 | 1234 | GLYPH g; |
177c0ea7 | 1235 | |
3fc809e2 KS |
1236 | SET_GLYPH_FROM_CHAR_GLYPH (g, *beg); |
1237 | ||
565b39a8 | 1238 | if (GLYPH_INVALID_P (g) |
42186983 | 1239 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) |
5f5c8ee5 GM |
1240 | len += 1; |
1241 | else | |
1242 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1243 | |
5f5c8ee5 GM |
1244 | ++beg; |
1245 | } | |
1246 | } | |
177c0ea7 | 1247 | |
5f5c8ee5 GM |
1248 | return len; |
1249 | } | |
1250 | ||
1251 | ||
59ea14cd PE |
1252 | /* Return true if the glyph rows A and B have equal contents. |
1253 | MOUSE_FACE_P means compare the mouse_face_p flags of A and B, too. */ | |
5f5c8ee5 | 1254 | |
b0ab8123 | 1255 | static bool |
59ea14cd | 1256 | row_equal_p (struct glyph_row *a, struct glyph_row *b, bool mouse_face_p) |
5f5c8ee5 | 1257 | { |
a54e2c05 DA |
1258 | eassert (verify_row_hash (a)); |
1259 | eassert (verify_row_hash (b)); | |
7a7270dd | 1260 | |
5f5c8ee5 GM |
1261 | if (a == b) |
1262 | return 1; | |
1263 | else if (a->hash != b->hash) | |
1264 | return 0; | |
1265 | else | |
1266 | { | |
1267 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1268 | int area; | |
1269 | ||
e4e0bee9 GM |
1270 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1271 | return 0; | |
1272 | ||
5f5c8ee5 GM |
1273 | /* Compare glyphs. */ |
1274 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1275 | { | |
1276 | if (a->used[area] != b->used[area]) | |
1277 | return 0; | |
177c0ea7 | 1278 | |
5f5c8ee5 GM |
1279 | a_glyph = a->glyphs[area]; |
1280 | a_end = a_glyph + a->used[area]; | |
1281 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1282 | |
5f5c8ee5 GM |
1283 | while (a_glyph < a_end |
1284 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1285 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1286 | |
5f5c8ee5 GM |
1287 | if (a_glyph != a_end) |
1288 | return 0; | |
1289 | } | |
1290 | ||
6b61353c KH |
1291 | if (a->fill_line_p != b->fill_line_p |
1292 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1293 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
1294 | || a->left_fringe_face_id != b->left_fringe_face_id | |
e61124cd | 1295 | || a->left_fringe_offset != b->left_fringe_offset |
6b61353c KH |
1296 | || a->right_fringe_bitmap != b->right_fringe_bitmap |
1297 | || a->right_fringe_face_id != b->right_fringe_face_id | |
e61124cd YM |
1298 | || a->right_fringe_offset != b->right_fringe_offset |
1299 | || a->fringe_bitmap_periodic_p != b->fringe_bitmap_periodic_p | |
3d4a365f | 1300 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
6b61353c | 1301 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1302 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1303 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1304 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
918f4159 | 1305 | || a->reversed_p != b->reversed_p |
5f5c8ee5 GM |
1306 | /* Different partially visible characters on left margin. */ |
1307 | || a->x != b->x | |
1308 | /* Different height. */ | |
1309 | || a->ascent != b->ascent | |
408f5064 GM |
1310 | || a->phys_ascent != b->phys_ascent |
1311 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1312 | || a->visible_height != b->visible_height) |
1313 | return 0; | |
1314 | } | |
1315 | ||
1316 | return 1; | |
1317 | } | |
1318 | ||
1319 | ||
1320 | \f | |
1321 | /*********************************************************************** | |
1322 | Glyph Pool | |
1323 | ||
1324 | See dispextern.h for an overall explanation of glyph pools. | |
1325 | ***********************************************************************/ | |
1326 | ||
1327 | /* Allocate a glyph_pool structure. The structure returned is | |
1328 | initialized with zeros. The global variable glyph_pool_count is | |
1329 | incremented for each pool allocated. */ | |
1330 | ||
1331 | static struct glyph_pool * | |
971de7fb | 1332 | new_glyph_pool (void) |
5f5c8ee5 | 1333 | { |
23f86fce | 1334 | struct glyph_pool *result = xzalloc (sizeof *result); |
177c0ea7 | 1335 | |
5f5c8ee5 GM |
1336 | /* For memory leak and double deletion checking. */ |
1337 | ++glyph_pool_count; | |
177c0ea7 | 1338 | |
5f5c8ee5 GM |
1339 | return result; |
1340 | } | |
1341 | ||
1342 | ||
1343 | /* Free a glyph_pool structure POOL. The function may be called with | |
1344 | a null POOL pointer. The global variable glyph_pool_count is | |
1345 | decremented with every pool structure freed. If this count gets | |
1346 | negative, more structures were freed than allocated, i.e. one | |
1347 | structure must have been freed more than once or a bogus pointer | |
1348 | was passed to free_glyph_pool. */ | |
1349 | ||
1350 | static void | |
971de7fb | 1351 | free_glyph_pool (struct glyph_pool *pool) |
5f5c8ee5 GM |
1352 | { |
1353 | if (pool) | |
1354 | { | |
153a073c | 1355 | /* More freed than allocated? */ |
5f5c8ee5 | 1356 | --glyph_pool_count; |
a54e2c05 | 1357 | eassert (glyph_pool_count >= 0); |
5f5c8ee5 GM |
1358 | |
1359 | xfree (pool->glyphs); | |
1360 | xfree (pool); | |
1361 | } | |
1362 | } | |
1363 | ||
1364 | ||
1365 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1366 | columns we need. This function never shrinks a pool. The only | |
1367 | case in which this would make sense, would be when a frame's size | |
1368 | is changed from a large value to a smaller one. But, if someone | |
1369 | does it once, we can expect that he will do it again. | |
1370 | ||
59ea14cd | 1371 | Return true if the pool changed in a way which makes |
5f5c8ee5 GM |
1372 | re-adjusting window glyph matrices necessary. */ |
1373 | ||
59ea14cd | 1374 | static bool |
971de7fb | 1375 | realloc_glyph_pool (struct glyph_pool *pool, struct dim matrix_dim) |
5f5c8ee5 | 1376 | { |
ca9ce8f2 | 1377 | ptrdiff_t needed; |
59ea14cd | 1378 | bool changed_p; |
5f5c8ee5 GM |
1379 | |
1380 | changed_p = (pool->glyphs == 0 | |
1381 | || matrix_dim.height != pool->nrows | |
1382 | || matrix_dim.width != pool->ncolumns); | |
1383 | ||
1384 | /* Enlarge the glyph pool. */ | |
ca9ce8f2 | 1385 | needed = matrix_dim.width; |
0065d054 PE |
1386 | if (INT_MULTIPLY_OVERFLOW (needed, matrix_dim.height)) |
1387 | memory_full (SIZE_MAX); | |
ca9ce8f2 | 1388 | needed *= matrix_dim.height; |
5f5c8ee5 GM |
1389 | if (needed > pool->nglyphs) |
1390 | { | |
0065d054 PE |
1391 | ptrdiff_t old_nglyphs = pool->nglyphs; |
1392 | pool->glyphs = xpalloc (pool->glyphs, &pool->nglyphs, | |
1393 | needed - old_nglyphs, -1, sizeof *pool->glyphs); | |
1394 | memset (pool->glyphs + old_nglyphs, 0, | |
1395 | (pool->nglyphs - old_nglyphs) * sizeof *pool->glyphs); | |
5f5c8ee5 GM |
1396 | } |
1397 | ||
153a073c | 1398 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1399 | to do sanity checks, and (b) the number of columns determines |
1400 | where rows in the frame matrix start---this must be available to | |
1401 | determine pointers to rows of window sub-matrices. */ | |
1402 | pool->nrows = matrix_dim.height; | |
1403 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1404 | |
5f5c8ee5 GM |
1405 | return changed_p; |
1406 | } | |
1407 | ||
1408 | ||
1409 | \f | |
1410 | /*********************************************************************** | |
1411 | Debug Code | |
1412 | ***********************************************************************/ | |
1413 | ||
e509cfa6 | 1414 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 1415 | |
a13396c9 | 1416 | |
28d440ab KL |
1417 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1418 | XXX Maybe this should be changed to flush the current terminal instead of | |
1419 | stdout. | |
1420 | */ | |
a13396c9 | 1421 | |
85fece3e PE |
1422 | void flush_stdout (void) EXTERNALLY_VISIBLE; |
1423 | ||
a13396c9 | 1424 | void |
59fc5cf9 | 1425 | flush_stdout (void) |
a13396c9 GM |
1426 | { |
1427 | fflush (stdout); | |
1428 | } | |
1429 | ||
1430 | ||
5f5c8ee5 GM |
1431 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1432 | pointer has been lost, e.g. by using a structure assignment between | |
1433 | rows, at least one pointer must occur more than once in the rows of | |
1434 | MATRIX. */ | |
1435 | ||
1436 | void | |
59fc5cf9 | 1437 | check_matrix_pointer_lossage (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
1438 | { |
1439 | int i, j; | |
177c0ea7 | 1440 | |
5f5c8ee5 GM |
1441 | for (i = 0; i < matrix->nrows; ++i) |
1442 | for (j = 0; j < matrix->nrows; ++j) | |
a54e2c05 | 1443 | eassert (i == j |
5f5c8ee5 GM |
1444 | || (matrix->rows[i].glyphs[TEXT_AREA] |
1445 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1446 | } | |
1447 | ||
1448 | ||
1449 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1450 | ||
1451 | struct glyph_row * | |
59fc5cf9 | 1452 | matrix_row (struct glyph_matrix *matrix, int row) |
5f5c8ee5 | 1453 | { |
a54e2c05 DA |
1454 | eassert (matrix && matrix->rows); |
1455 | eassert (row >= 0 && row < matrix->nrows); | |
5f5c8ee5 GM |
1456 | |
1457 | /* That's really too slow for normal testing because this function | |
1458 | is called almost everywhere. Although---it's still astonishingly | |
1459 | fast, so it is valuable to have for debugging purposes. */ | |
1460 | #if 0 | |
1461 | check_matrix_pointer_lossage (matrix); | |
1462 | #endif | |
177c0ea7 | 1463 | |
5f5c8ee5 GM |
1464 | return matrix->rows + row; |
1465 | } | |
1466 | ||
1467 | ||
1468 | #if 0 /* This function makes invalid assumptions when text is | |
1469 | partially invisible. But it might come handy for debugging | |
1470 | nevertheless. */ | |
1471 | ||
1472 | /* Check invariants that must hold for an up to date current matrix of | |
1473 | window W. */ | |
1474 | ||
1475 | static void | |
59fc5cf9 | 1476 | check_matrix_invariants (struct window *w) |
5f5c8ee5 GM |
1477 | { |
1478 | struct glyph_matrix *matrix = w->current_matrix; | |
1479 | int yb = window_text_bottom_y (w); | |
1480 | struct glyph_row *row = matrix->rows; | |
1481 | struct glyph_row *last_text_row = NULL; | |
1482 | struct buffer *saved = current_buffer; | |
d3d50620 | 1483 | struct buffer *buffer = XBUFFER (w->buffer); |
5f5c8ee5 | 1484 | int c; |
177c0ea7 | 1485 | |
5f5c8ee5 GM |
1486 | /* This can sometimes happen for a fresh window. */ |
1487 | if (matrix->nrows < 2) | |
1488 | return; | |
1489 | ||
1490 | set_buffer_temp (buffer); | |
1491 | ||
1492 | /* Note: last row is always reserved for the mode line. */ | |
1493 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1494 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1495 | { | |
1496 | struct glyph_row *next = row + 1; | |
1497 | ||
1498 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1499 | last_text_row = row; | |
1500 | ||
1501 | /* Check that character and byte positions are in sync. */ | |
a54e2c05 | 1502 | eassert (MATRIX_ROW_START_BYTEPOS (row) |
5f5c8ee5 | 1503 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); |
a54e2c05 | 1504 | eassert (BYTEPOS (row->start.pos) |
d36fe237 | 1505 | == CHAR_TO_BYTE (CHARPOS (row->start.pos))); |
5f5c8ee5 GM |
1506 | |
1507 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1508 | have such a position temporarily in case of a minibuffer | |
1509 | displaying something like `[Sole completion]' at its end. */ | |
1510 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
d36fe237 | 1511 | { |
a54e2c05 | 1512 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
d36fe237 | 1513 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); |
a54e2c05 | 1514 | eassert (BYTEPOS (row->end.pos) |
d36fe237 EZ |
1515 | == CHAR_TO_BYTE (CHARPOS (row->end.pos))); |
1516 | } | |
5f5c8ee5 GM |
1517 | |
1518 | /* Check that end position of `row' is equal to start position | |
1519 | of next row. */ | |
1520 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1521 | { | |
a54e2c05 | 1522 | eassert (MATRIX_ROW_END_CHARPOS (row) |
5f5c8ee5 | 1523 | == MATRIX_ROW_START_CHARPOS (next)); |
a54e2c05 | 1524 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
5f5c8ee5 | 1525 | == MATRIX_ROW_START_BYTEPOS (next)); |
a54e2c05 DA |
1526 | eassert (CHARPOS (row->end.pos) == CHARPOS (next->start.pos)); |
1527 | eassert (BYTEPOS (row->end.pos) == BYTEPOS (next->start.pos)); | |
5f5c8ee5 GM |
1528 | } |
1529 | row = next; | |
1530 | } | |
1531 | ||
a54e2c05 DA |
1532 | eassert (w->current_matrix->nrows == w->desired_matrix->nrows); |
1533 | eassert (w->desired_matrix->rows != NULL); | |
5f5c8ee5 GM |
1534 | set_buffer_temp (saved); |
1535 | } | |
1536 | ||
1537 | #endif /* 0 */ | |
1538 | ||
e509cfa6 | 1539 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
1540 | |
1541 | ||
1542 | \f | |
1543 | /********************************************************************** | |
1544 | Allocating/ Adjusting Glyph Matrices | |
1545 | **********************************************************************/ | |
1546 | ||
1547 | /* Allocate glyph matrices over a window tree for a frame-based | |
1548 | redisplay | |
1549 | ||
1550 | X and Y are column/row within the frame glyph matrix where | |
1551 | sub-matrices for the window tree rooted at WINDOW must be | |
59ea14cd | 1552 | allocated. DIM_ONLY_P means that the caller of this |
8ce2650d YM |
1553 | function is only interested in the result matrix dimension, and |
1554 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1555 | |
1556 | The function returns the total width/height of the sub-matrices of | |
1557 | the window tree. If called on a frame root window, the computation | |
1558 | will take the mini-buffer window into account. | |
1559 | ||
1560 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1561 | ||
1562 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1563 | glyph matrices yet, and | |
1564 | ||
1565 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1566 | any window in the tree will be changed or have been changed (see | |
153a073c | 1567 | DIM_ONLY_P) |
5f5c8ee5 GM |
1568 | |
1569 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1570 | function. | |
1571 | ||
1572 | Windows are arranged into chains of windows on the same level | |
1573 | through the next fields of window structures. Such a level can be | |
1574 | either a sequence of horizontally adjacent windows from left to | |
1575 | right, or a sequence of vertically adjacent windows from top to | |
1576 | bottom. Each window in a horizontal sequence can be either a leaf | |
1577 | window or a vertical sequence; a window in a vertical sequence can | |
1578 | be either a leaf or a horizontal sequence. All windows in a | |
1579 | horizontal sequence have the same height, and all windows in a | |
1580 | vertical sequence have the same width. | |
1581 | ||
1582 | This function uses, for historical reasons, a more general | |
1583 | algorithm to determine glyph matrix dimensions that would be | |
1584 | necessary. | |
1585 | ||
1586 | The matrix height of a horizontal sequence is determined by the | |
1587 | maximum height of any matrix in the sequence. The matrix width of | |
1588 | a horizontal sequence is computed by adding up matrix widths of | |
1589 | windows in the sequence. | |
1590 | ||
1591 | |<------- result width ------->| | |
1592 | +---------+----------+---------+ --- | |
1593 | | | | | | | |
1594 | | | | | | |
1595 | +---------+ | | result height | |
1596 | | +---------+ | |
1597 | | | | | |
1598 | +----------+ --- | |
1599 | ||
1600 | The matrix width of a vertical sequence is the maximum matrix width | |
1601 | of any window in the sequence. Its height is computed by adding up | |
1602 | matrix heights of windows in the sequence. | |
1603 | ||
1604 | |<---- result width -->| | |
1605 | +---------+ --- | |
1606 | | | | | |
1607 | | | | | |
1608 | +---------+--+ | | |
1609 | | | | | |
1610 | | | result height | |
1611 | | | | |
1612 | +------------+---------+ | | |
1613 | | | | | |
1614 | | | | | |
1615 | +------------+---------+ --- */ | |
1616 | ||
1617 | /* Bit indicating that a new matrix will be allocated or has been | |
1618 | allocated. */ | |
1619 | ||
1620 | #define NEW_LEAF_MATRIX (1 << 0) | |
1621 | ||
1622 | /* Bit indicating that a matrix will or has changed its location or | |
1623 | size. */ | |
1624 | ||
1625 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1626 | ||
1627 | static struct dim | |
6f704c76 | 1628 | allocate_matrices_for_frame_redisplay (Lisp_Object window, int x, int y, |
59ea14cd | 1629 | bool dim_only_p, int *window_change_flags) |
5f5c8ee5 GM |
1630 | { |
1631 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1632 | int x0 = x, y0 = y; | |
1633 | int wmax = 0, hmax = 0; | |
1634 | struct dim total; | |
1635 | struct dim dim; | |
1636 | struct window *w; | |
59ea14cd | 1637 | bool in_horz_combination_p; |
5f5c8ee5 GM |
1638 | |
1639 | /* What combination is WINDOW part of? Compute this once since the | |
1640 | result is the same for all windows in the `next' chain. The | |
1641 | special case of a root window (parent equal to nil) is treated | |
1642 | like a vertical combination because a root window's `next' | |
1643 | points to the mini-buffer window, if any, which is arranged | |
1644 | vertically below other windows. */ | |
1645 | in_horz_combination_p | |
d3d50620 DA |
1646 | = (!NILP (XWINDOW (window)->parent) |
1647 | && !NILP (XWINDOW (XWINDOW (window)->parent)->hchild)); | |
5f5c8ee5 GM |
1648 | |
1649 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1650 | do |
5f5c8ee5 GM |
1651 | { |
1652 | w = XWINDOW (window); | |
1653 | ||
1654 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1655 | on whether this is a combination or a leaf window. */ |
d3d50620 DA |
1656 | if (!NILP (w->hchild)) |
1657 | dim = allocate_matrices_for_frame_redisplay (w->hchild, x, y, | |
5f5c8ee5 GM |
1658 | dim_only_p, |
1659 | window_change_flags); | |
d3d50620 DA |
1660 | else if (!NILP (w->vchild)) |
1661 | dim = allocate_matrices_for_frame_redisplay (w->vchild, x, y, | |
5f5c8ee5 GM |
1662 | dim_only_p, |
1663 | window_change_flags); | |
1664 | else | |
1665 | { | |
1666 | /* If not already done, allocate sub-matrix structures. */ | |
1667 | if (w->desired_matrix == NULL) | |
1668 | { | |
1669 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1670 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1671 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1672 | } | |
177c0ea7 | 1673 | |
5f5c8ee5 GM |
1674 | /* Width and height MUST be chosen so that there are no |
1675 | holes in the frame matrix. */ | |
5d3cc43c GM |
1676 | dim.width = required_matrix_width (w); |
1677 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1678 | |
1679 | /* Will matrix be re-allocated? */ | |
1680 | if (x != w->desired_matrix->matrix_x | |
1681 | || y != w->desired_matrix->matrix_y | |
1682 | || dim.width != w->desired_matrix->matrix_w | |
1683 | || dim.height != w->desired_matrix->matrix_h | |
1684 | || (margin_glyphs_to_reserve (w, dim.width, | |
d3d50620 | 1685 | w->left_margin_cols) |
5f5c8ee5 GM |
1686 | != w->desired_matrix->left_margin_glyphs) |
1687 | || (margin_glyphs_to_reserve (w, dim.width, | |
d3d50620 | 1688 | w->right_margin_cols) |
5f5c8ee5 GM |
1689 | != w->desired_matrix->right_margin_glyphs)) |
1690 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1691 | ||
1692 | /* Actually change matrices, if allowed. Do not consider | |
1693 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1694 | may have been changed which we don't now here. We trust | |
59ea14cd | 1695 | that we only will be called with DIM_ONLY_P when |
5f5c8ee5 GM |
1696 | necessary. */ |
1697 | if (!dim_only_p) | |
1698 | { | |
1699 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1700 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1701 | } | |
1702 | } | |
1703 | ||
1704 | /* If we are part of a horizontal combination, advance x for | |
1705 | windows to the right of W; otherwise advance y for windows | |
1706 | below W. */ | |
1707 | if (in_horz_combination_p) | |
1708 | x += dim.width; | |
177c0ea7 | 1709 | else |
5f5c8ee5 GM |
1710 | y += dim.height; |
1711 | ||
1712 | /* Remember maximum glyph matrix dimensions. */ | |
1713 | wmax = max (wmax, dim.width); | |
1714 | hmax = max (hmax, dim.height); | |
1715 | ||
1716 | /* Next window on same level. */ | |
d3d50620 | 1717 | window = w->next; |
5f5c8ee5 GM |
1718 | } |
1719 | while (!NILP (window)); | |
1720 | ||
1721 | /* Set `total' to the total glyph matrix dimension of this window | |
1722 | level. In a vertical combination, the width is the width of the | |
1723 | widest window; the height is the y we finally reached, corrected | |
1724 | by the y we started with. In a horizontal combination, the total | |
1725 | height is the height of the tallest window, and the width is the | |
1726 | x we finally reached, corrected by the x we started with. */ | |
1727 | if (in_horz_combination_p) | |
1728 | { | |
1729 | total.width = x - x0; | |
1730 | total.height = hmax; | |
1731 | } | |
177c0ea7 | 1732 | else |
5f5c8ee5 GM |
1733 | { |
1734 | total.width = wmax; | |
1735 | total.height = y - y0; | |
1736 | } | |
1737 | ||
1738 | return total; | |
1739 | } | |
1740 | ||
1741 | ||
5d3cc43c GM |
1742 | /* Return the required height of glyph matrices for window W. */ |
1743 | ||
2f7c71a1 | 1744 | static int |
971de7fb | 1745 | required_matrix_height (struct window *w) |
5d3cc43c GM |
1746 | { |
1747 | #ifdef HAVE_WINDOW_SYSTEM | |
d3d50620 | 1748 | struct frame *f = XFRAME (w->frame); |
177c0ea7 | 1749 | |
5d3cc43c GM |
1750 | if (FRAME_WINDOW_P (f)) |
1751 | { | |
1752 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1ea40aa2 | 1753 | int window_pixel_height = window_box_height (w) + eabs (w->vscroll); |
5d3cc43c | 1754 | return (((window_pixel_height + ch_height - 1) |
cc834cf9 | 1755 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
1756 | /* One partially visible line at the top and |
1757 | bottom of the window. */ | |
1758 | + 2 | |
153a073c | 1759 | /* 2 for header and mode line. */ |
5d3cc43c GM |
1760 | + 2); |
1761 | } | |
1762 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 1763 | |
7df02016 | 1764 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
1765 | } |
1766 | ||
1767 | ||
1768 | /* Return the required width of glyph matrices for window W. */ | |
1769 | ||
2f7c71a1 | 1770 | static int |
971de7fb | 1771 | required_matrix_width (struct window *w) |
5d3cc43c GM |
1772 | { |
1773 | #ifdef HAVE_WINDOW_SYSTEM | |
d3d50620 | 1774 | struct frame *f = XFRAME (w->frame); |
5d3cc43c GM |
1775 | if (FRAME_WINDOW_P (f)) |
1776 | { | |
1777 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 1778 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 1779 | |
5d3cc43c GM |
1780 | /* Compute number of glyphs needed in a glyph row. */ |
1781 | return (((window_pixel_width + ch_width - 1) | |
cc834cf9 | 1782 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
1783 | /* 2 partially visible columns in the text area. */ |
1784 | + 2 | |
1785 | /* One partially visible column at the right | |
1786 | edge of each marginal area. */ | |
1787 | + 1 + 1); | |
1788 | } | |
1789 | #endif /* HAVE_WINDOW_SYSTEM */ | |
1790 | ||
d3d50620 | 1791 | return XINT (w->total_cols); |
5d3cc43c GM |
1792 | } |
1793 | ||
1794 | ||
5f5c8ee5 | 1795 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 1796 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 1797 | |
5f5c8ee5 | 1798 | static void |
971de7fb | 1799 | allocate_matrices_for_window_redisplay (struct window *w) |
5f5c8ee5 | 1800 | { |
5f5c8ee5 GM |
1801 | while (w) |
1802 | { | |
d3d50620 DA |
1803 | if (!NILP (w->vchild)) |
1804 | allocate_matrices_for_window_redisplay (XWINDOW (w->vchild)); | |
1805 | else if (!NILP (w->hchild)) | |
1806 | allocate_matrices_for_window_redisplay (XWINDOW (w->hchild)); | |
5f5c8ee5 GM |
1807 | else |
1808 | { | |
1809 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
1810 | struct dim dim; |
1811 | ||
1812 | /* If matrices are not yet allocated, allocate them now. */ | |
1813 | if (w->desired_matrix == NULL) | |
1814 | { | |
1815 | w->desired_matrix = new_glyph_matrix (NULL); | |
1816 | w->current_matrix = new_glyph_matrix (NULL); | |
1817 | } | |
1818 | ||
5d3cc43c GM |
1819 | dim.width = required_matrix_width (w); |
1820 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1821 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
1822 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
1823 | } | |
177c0ea7 | 1824 | |
d3d50620 | 1825 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
5f5c8ee5 GM |
1826 | } |
1827 | } | |
1828 | ||
1829 | ||
1830 | /* Re-allocate/ re-compute glyph matrices on frame F. If F is null, | |
1831 | do it for all frames; otherwise do it just for the given frame. | |
1832 | This function must be called when a new frame is created, its size | |
1833 | changes, or its window configuration changes. */ | |
1834 | ||
1835 | void | |
971de7fb | 1836 | adjust_glyphs (struct frame *f) |
5f5c8ee5 | 1837 | { |
408f5064 GM |
1838 | /* Block input so that expose events and other events that access |
1839 | glyph matrices are not processed while we are changing them. */ | |
4d7e6e51 | 1840 | block_input (); |
408f5064 | 1841 | |
5f5c8ee5 GM |
1842 | if (f) |
1843 | adjust_frame_glyphs (f); | |
1844 | else | |
1845 | { | |
1846 | Lisp_Object tail, lisp_frame; | |
177c0ea7 | 1847 | |
5f5c8ee5 GM |
1848 | FOR_EACH_FRAME (tail, lisp_frame) |
1849 | adjust_frame_glyphs (XFRAME (lisp_frame)); | |
1850 | } | |
408f5064 | 1851 | |
4d7e6e51 | 1852 | unblock_input (); |
5f5c8ee5 GM |
1853 | } |
1854 | ||
1855 | ||
1856 | /* Adjust frame glyphs when Emacs is initialized. | |
177c0ea7 JB |
1857 | |
1858 | To be called from init_display. | |
1859 | ||
5f5c8ee5 GM |
1860 | We need a glyph matrix because redraw will happen soon. |
1861 | Unfortunately, window sizes on selected_frame are not yet set to | |
1862 | meaningful values. I believe we can assume that there are only two | |
1863 | windows on the frame---the mini-buffer and the root window. Frame | |
1864 | height and width seem to be correct so far. So, set the sizes of | |
1865 | windows to estimated values. */ | |
1866 | ||
1867 | static void | |
971de7fb | 1868 | adjust_frame_glyphs_initially (void) |
5f5c8ee5 | 1869 | { |
91fb7e1b | 1870 | struct frame *sf = SELECTED_FRAME (); |
e69b0960 | 1871 | struct window *root = XWINDOW (sf->root_window); |
d3d50620 | 1872 | struct window *mini = XWINDOW (root->next); |
7df02016 KS |
1873 | int frame_lines = FRAME_LINES (sf); |
1874 | int frame_cols = FRAME_COLS (sf); | |
91fb7e1b | 1875 | int top_margin = FRAME_TOP_MARGIN (sf); |
5f5c8ee5 GM |
1876 | |
1877 | /* Do it for the root window. */ | |
e8c17b81 PE |
1878 | wset_top_line (root, make_number (top_margin)); |
1879 | wset_total_lines (root, make_number (frame_lines - 1 - top_margin)); | |
1880 | wset_total_cols (root, make_number (frame_cols)); | |
5f5c8ee5 GM |
1881 | |
1882 | /* Do it for the mini-buffer window. */ | |
e8c17b81 PE |
1883 | wset_top_line (mini, make_number (frame_lines - 1)); |
1884 | wset_total_lines (mini, make_number (1)); | |
1885 | wset_total_cols (mini, make_number (frame_cols)); | |
5f5c8ee5 | 1886 | |
91fb7e1b | 1887 | adjust_frame_glyphs (sf); |
5f5c8ee5 GM |
1888 | glyphs_initialized_initially_p = 1; |
1889 | } | |
177c0ea7 | 1890 | |
5f5c8ee5 GM |
1891 | |
1892 | /* Allocate/reallocate glyph matrices of a single frame F. */ | |
1893 | ||
1894 | static void | |
971de7fb | 1895 | adjust_frame_glyphs (struct frame *f) |
5f5c8ee5 GM |
1896 | { |
1897 | if (FRAME_WINDOW_P (f)) | |
1898 | adjust_frame_glyphs_for_window_redisplay (f); | |
1899 | else | |
1900 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 1901 | |
5f5c8ee5 GM |
1902 | /* Don't forget the message buffer and the buffer for |
1903 | decode_mode_spec. */ | |
1904 | adjust_frame_message_buffer (f); | |
1905 | adjust_decode_mode_spec_buffer (f); | |
1906 | ||
1907 | f->glyphs_initialized_p = 1; | |
1908 | } | |
1909 | ||
59ea14cd | 1910 | /* Return true if any window in the tree has nonzero window margins. See |
075757cc | 1911 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ |
59ea14cd | 1912 | static bool |
971de7fb | 1913 | showing_window_margins_p (struct window *w) |
075757cc CY |
1914 | { |
1915 | while (w) | |
1916 | { | |
d3d50620 | 1917 | if (!NILP (w->hchild)) |
075757cc | 1918 | { |
d3d50620 | 1919 | if (showing_window_margins_p (XWINDOW (w->hchild))) |
075757cc CY |
1920 | return 1; |
1921 | } | |
d3d50620 | 1922 | else if (!NILP (w->vchild)) |
075757cc | 1923 | { |
d3d50620 | 1924 | if (showing_window_margins_p (XWINDOW (w->vchild))) |
075757cc CY |
1925 | return 1; |
1926 | } | |
d3d50620 DA |
1927 | else if (!NILP (w->left_margin_cols) |
1928 | || !NILP (w->right_margin_cols)) | |
075757cc | 1929 | return 1; |
3fc809e2 | 1930 | |
d3d50620 | 1931 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
075757cc CY |
1932 | } |
1933 | return 0; | |
1934 | } | |
1935 | ||
5f5c8ee5 | 1936 | |
c9f00270 GM |
1937 | /* In the window tree with root W, build current matrices of leaf |
1938 | windows from the frame's current matrix. */ | |
1939 | ||
1940 | static void | |
971de7fb | 1941 | fake_current_matrices (Lisp_Object window) |
c9f00270 GM |
1942 | { |
1943 | struct window *w; | |
177c0ea7 | 1944 | |
d3d50620 | 1945 | for (; !NILP (window); window = w->next) |
c9f00270 GM |
1946 | { |
1947 | w = XWINDOW (window); | |
177c0ea7 | 1948 | |
d3d50620 DA |
1949 | if (!NILP (w->hchild)) |
1950 | fake_current_matrices (w->hchild); | |
1951 | else if (!NILP (w->vchild)) | |
1952 | fake_current_matrices (w->vchild); | |
c9f00270 GM |
1953 | else |
1954 | { | |
1955 | int i; | |
d3d50620 | 1956 | struct frame *f = XFRAME (w->frame); |
c9f00270 GM |
1957 | struct glyph_matrix *m = w->current_matrix; |
1958 | struct glyph_matrix *fm = f->current_matrix; | |
1959 | ||
a54e2c05 DA |
1960 | eassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
1961 | eassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 1962 | |
c9f00270 GM |
1963 | for (i = 0; i < m->matrix_h; ++i) |
1964 | { | |
1965 | struct glyph_row *r = m->rows + i; | |
7df02016 | 1966 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 | 1967 | |
a54e2c05 | 1968 | eassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] |
c9f00270 GM |
1969 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); |
1970 | ||
1971 | r->enabled_p = fr->enabled_p; | |
1972 | if (r->enabled_p) | |
1973 | { | |
1974 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
1975 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
1976 | r->used[TEXT_AREA] = (m->matrix_w | |
1977 | - r->used[LEFT_MARGIN_AREA] | |
1978 | - r->used[RIGHT_MARGIN_AREA]); | |
1979 | r->mode_line_p = 0; | |
c9f00270 GM |
1980 | } |
1981 | } | |
1982 | } | |
1983 | } | |
1984 | } | |
1985 | ||
1986 | ||
bccee4f2 | 1987 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 1988 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 1989 | |
bccee4f2 | 1990 | static struct glyph_matrix * |
971de7fb | 1991 | save_current_matrix (struct frame *f) |
c9f00270 | 1992 | { |
bccee4f2 | 1993 | int i; |
38182d90 | 1994 | struct glyph_matrix *saved = xzalloc (sizeof *saved); |
bccee4f2 | 1995 | saved->nrows = f->current_matrix->nrows; |
23f86fce | 1996 | saved->rows = xzalloc (saved->nrows * sizeof *saved->rows); |
bccee4f2 GM |
1997 | |
1998 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 1999 | { |
bccee4f2 GM |
2000 | struct glyph_row *from = f->current_matrix->rows + i; |
2001 | struct glyph_row *to = saved->rows + i; | |
dfd153ae | 2002 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
23f86fce | 2003 | to->glyphs[TEXT_AREA] = xmalloc (nbytes); |
72af86bd | 2004 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
bccee4f2 | 2005 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
e797dea6 | 2006 | } |
bccee4f2 GM |
2007 | |
2008 | return saved; | |
2009 | } | |
2010 | ||
2011 | ||
2012 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
2013 | and free memory associated with SAVED. */ | |
2014 | ||
2015 | static void | |
971de7fb | 2016 | restore_current_matrix (struct frame *f, struct glyph_matrix *saved) |
bccee4f2 GM |
2017 | { |
2018 | int i; | |
2019 | ||
2020 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 2021 | { |
bccee4f2 GM |
2022 | struct glyph_row *from = saved->rows + i; |
2023 | struct glyph_row *to = f->current_matrix->rows + i; | |
dfd153ae | 2024 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
72af86bd | 2025 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
e797dea6 | 2026 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
bccee4f2 | 2027 | xfree (from->glyphs[TEXT_AREA]); |
e797dea6 | 2028 | } |
177c0ea7 | 2029 | |
bccee4f2 GM |
2030 | xfree (saved->rows); |
2031 | xfree (saved); | |
c9f00270 GM |
2032 | } |
2033 | ||
2034 | ||
bccee4f2 | 2035 | |
5f5c8ee5 GM |
2036 | /* Allocate/reallocate glyph matrices of a single frame F for |
2037 | frame-based redisplay. */ | |
2038 | ||
2039 | static void | |
971de7fb | 2040 | adjust_frame_glyphs_for_frame_redisplay (struct frame *f) |
5f5c8ee5 | 2041 | { |
5f5c8ee5 | 2042 | struct dim matrix_dim; |
59ea14cd | 2043 | bool pool_changed_p; |
5f5c8ee5 GM |
2044 | int window_change_flags; |
2045 | int top_window_y; | |
2046 | ||
2047 | if (!FRAME_LIVE_P (f)) | |
2048 | return; | |
2049 | ||
5f5c8ee5 GM |
2050 | top_window_y = FRAME_TOP_MARGIN (f); |
2051 | ||
2052 | /* Allocate glyph pool structures if not already done. */ | |
2053 | if (f->desired_pool == NULL) | |
2054 | { | |
2055 | f->desired_pool = new_glyph_pool (); | |
2056 | f->current_pool = new_glyph_pool (); | |
2057 | } | |
2058 | ||
2059 | /* Allocate frames matrix structures if needed. */ | |
2060 | if (f->desired_matrix == NULL) | |
2061 | { | |
2062 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
2063 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
2064 | } | |
177c0ea7 | 2065 | |
5f5c8ee5 GM |
2066 | /* Compute window glyph matrices. (This takes the mini-buffer |
2067 | window into account). The result is the size of the frame glyph | |
2068 | matrix needed. The variable window_change_flags is set to a bit | |
2069 | mask indicating whether new matrices will be allocated or | |
2070 | existing matrices change their size or location within the frame | |
2071 | matrix. */ | |
2072 | window_change_flags = 0; | |
2073 | matrix_dim | |
2074 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
2075 | 0, top_window_y, | |
5d3cc43c | 2076 | 1, |
5f5c8ee5 GM |
2077 | &window_change_flags); |
2078 | ||
2079 | /* Add in menu bar lines, if any. */ | |
2080 | matrix_dim.height += top_window_y; | |
2081 | ||
2082 | /* Enlarge pools as necessary. */ | |
2083 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
2084 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
2085 | ||
177c0ea7 | 2086 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
2087 | absolutely necessary since it requires a frame redraw. */ |
2088 | if (pool_changed_p || window_change_flags) | |
2089 | { | |
2090 | /* Do it for window matrices. */ | |
2091 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 2092 | 0, top_window_y, 0, |
5f5c8ee5 GM |
2093 | &window_change_flags); |
2094 | ||
2095 | /* Size of frame matrices must equal size of frame. Note | |
2096 | that we are called for X frames with window widths NOT equal | |
2097 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
a54e2c05 | 2098 | eassert (matrix_dim.width == FRAME_COLS (f) |
7df02016 | 2099 | && matrix_dim.height == FRAME_LINES (f)); |
177c0ea7 | 2100 | |
e797dea6 GM |
2101 | /* Pointers to glyph memory in glyph rows are exchanged during |
2102 | the update phase of redisplay, which means in general that a | |
2103 | frame's current matrix consists of pointers into both the | |
2104 | desired and current glyph pool of the frame. Adjusting a | |
2105 | matrix sets the frame matrix up so that pointers are all into | |
2106 | the same pool. If we want to preserve glyph contents of the | |
2107 | current matrix over a call to adjust_glyph_matrix, we must | |
2108 | make a copy of the current glyphs, and restore the current | |
2109 | matrix' contents from that copy. */ | |
2110 | if (display_completed | |
2111 | && !FRAME_GARBAGED_P (f) | |
2112 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
2113 | && matrix_dim.height == f->current_matrix->matrix_h |
2114 | /* For some reason, the frame glyph matrix gets corrupted if | |
2115 | any of the windows contain margins. I haven't been able | |
2116 | to hunt down the reason, but for the moment this prevents | |
2117 | the problem from manifesting. -- cyd */ | |
d5c20fe8 | 2118 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) |
e797dea6 | 2119 | { |
bccee4f2 GM |
2120 | struct glyph_matrix *copy = save_current_matrix (f); |
2121 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2122 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2123 | restore_current_matrix (f, copy); |
e797dea6 GM |
2124 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2125 | } | |
c9f00270 | 2126 | else |
e797dea6 | 2127 | { |
bccee4f2 | 2128 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2129 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2130 | SET_FRAME_GARBAGED (f); | |
2131 | } | |
5f5c8ee5 GM |
2132 | } |
2133 | } | |
2134 | ||
2135 | ||
2136 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2137 | window-based redisplay. */ | |
2138 | ||
2139 | static void | |
971de7fb | 2140 | adjust_frame_glyphs_for_window_redisplay (struct frame *f) |
5f5c8ee5 | 2141 | { |
a54e2c05 | 2142 | eassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); |
177c0ea7 | 2143 | |
5f5c8ee5 | 2144 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2145 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2146 | |
8ce2650d | 2147 | #ifdef HAVE_X_WINDOWS |
5f5c8ee5 GM |
2148 | /* Allocate/ reallocate matrices of the dummy window used to display |
2149 | the menu bar under X when no X toolkit support is available. */ | |
488dd4c4 | 2150 | #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2151 | { |
2152 | /* Allocate a dummy window if not already done. */ | |
d2d37ddc | 2153 | struct window *w; |
e69b0960 | 2154 | if (NILP (f->menu_bar_window)) |
5f5c8ee5 | 2155 | { |
077288cf | 2156 | Lisp_Object frame; |
f00af5b1 | 2157 | fset_menu_bar_window (f, make_window ()); |
e69b0960 | 2158 | w = XWINDOW (f->menu_bar_window); |
077288cf | 2159 | XSETFRAME (frame, f); |
e8c17b81 | 2160 | wset_frame (w, frame); |
5f5c8ee5 GM |
2161 | w->pseudo_window_p = 1; |
2162 | } | |
2163 | else | |
e69b0960 | 2164 | w = XWINDOW (f->menu_bar_window); |
5f5c8ee5 GM |
2165 | |
2166 | /* Set window dimensions to frame dimensions and allocate or | |
2167 | adjust glyph matrices of W. */ | |
e8c17b81 PE |
2168 | wset_top_line (w, make_number (0)); |
2169 | wset_left_col (w, make_number (0)); | |
2170 | wset_total_lines (w, make_number (FRAME_MENU_BAR_LINES (f))); | |
2171 | wset_total_cols (w, make_number (FRAME_TOTAL_COLS (f))); | |
5d3cc43c | 2172 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2173 | } |
57714a86 YM |
2174 | #endif /* not USE_X_TOOLKIT && not USE_GTK */ |
2175 | #endif /* HAVE_X_WINDOWS */ | |
5f5c8ee5 | 2176 | |
488dd4c4 | 2177 | #ifndef USE_GTK |
d2d37ddc PE |
2178 | { |
2179 | /* Allocate/ reallocate matrices of the tool bar window. If we | |
2180 | don't have a tool bar window yet, make one. */ | |
2181 | struct window *w; | |
e69b0960 | 2182 | if (NILP (f->tool_bar_window)) |
d2d37ddc | 2183 | { |
077288cf | 2184 | Lisp_Object frame; |
f00af5b1 | 2185 | fset_tool_bar_window (f, make_window ()); |
e69b0960 | 2186 | w = XWINDOW (f->tool_bar_window); |
077288cf | 2187 | XSETFRAME (frame, f); |
e8c17b81 | 2188 | wset_frame (w, frame); |
d2d37ddc PE |
2189 | w->pseudo_window_p = 1; |
2190 | } | |
2191 | else | |
e69b0960 | 2192 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2193 | |
e8c17b81 PE |
2194 | wset_top_line (w, make_number (FRAME_MENU_BAR_LINES (f))); |
2195 | wset_left_col (w, make_number (0)); | |
2196 | wset_total_lines (w, make_number (FRAME_TOOL_BAR_LINES (f))); | |
2197 | wset_total_cols (w, make_number (FRAME_TOTAL_COLS (f))); | |
d2d37ddc PE |
2198 | allocate_matrices_for_window_redisplay (w); |
2199 | } | |
488dd4c4 | 2200 | #endif |
5f5c8ee5 GM |
2201 | } |
2202 | ||
2203 | ||
177c0ea7 | 2204 | /* Adjust/ allocate message buffer of frame F. |
5f5c8ee5 | 2205 | |
5f5c8ee5 GM |
2206 | Note that the message buffer is never freed. Since I could not |
2207 | find a free in 19.34, I assume that freeing it would be | |
2208 | problematic in some way and don't do it either. | |
2209 | ||
2210 | (Implementation note: It should be checked if we can free it | |
2211 | eventually without causing trouble). */ | |
2212 | ||
2213 | static void | |
971de7fb | 2214 | adjust_frame_message_buffer (struct frame *f) |
5f5c8ee5 | 2215 | { |
38182d90 PE |
2216 | FRAME_MESSAGE_BUF (f) = xrealloc (FRAME_MESSAGE_BUF (f), |
2217 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
5f5c8ee5 GM |
2218 | } |
2219 | ||
2220 | ||
2221 | /* Re-allocate buffer for decode_mode_spec on frame F. */ | |
2222 | ||
2223 | static void | |
971de7fb | 2224 | adjust_decode_mode_spec_buffer (struct frame *f) |
5f5c8ee5 | 2225 | { |
38182d90 PE |
2226 | f->decode_mode_spec_buffer = xrealloc (f->decode_mode_spec_buffer, |
2227 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
5f5c8ee5 GM |
2228 | } |
2229 | ||
2230 | ||
2231 | \f | |
2232 | /********************************************************************** | |
2233 | Freeing Glyph Matrices | |
2234 | **********************************************************************/ | |
2235 | ||
2236 | /* Free glyph memory for a frame F. F may be null. This function can | |
2237 | be called for the same frame more than once. The root window of | |
2238 | F may be nil when this function is called. This is the case when | |
2239 | the function is called when F is destroyed. */ | |
2240 | ||
2241 | void | |
971de7fb | 2242 | free_glyphs (struct frame *f) |
5f5c8ee5 GM |
2243 | { |
2244 | if (f && f->glyphs_initialized_p) | |
2245 | { | |
42f55fe0 GM |
2246 | /* Block interrupt input so that we don't get surprised by an X |
2247 | event while we're in an inconsistent state. */ | |
4d7e6e51 | 2248 | block_input (); |
5f5c8ee5 | 2249 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2250 | |
5f5c8ee5 | 2251 | /* Release window sub-matrices. */ |
e69b0960 DA |
2252 | if (!NILP (f->root_window)) |
2253 | free_window_matrices (XWINDOW (f->root_window)); | |
5f5c8ee5 GM |
2254 | |
2255 | /* Free the dummy window for menu bars without X toolkit and its | |
2256 | glyph matrices. */ | |
e69b0960 | 2257 | if (!NILP (f->menu_bar_window)) |
5f5c8ee5 | 2258 | { |
e69b0960 | 2259 | struct window *w = XWINDOW (f->menu_bar_window); |
5f5c8ee5 GM |
2260 | free_glyph_matrix (w->desired_matrix); |
2261 | free_glyph_matrix (w->current_matrix); | |
2262 | w->desired_matrix = w->current_matrix = NULL; | |
f00af5b1 | 2263 | fset_menu_bar_window (f, Qnil); |
5f5c8ee5 GM |
2264 | } |
2265 | ||
9ea173e8 | 2266 | /* Free the tool bar window and its glyph matrices. */ |
e69b0960 | 2267 | if (!NILP (f->tool_bar_window)) |
5f5c8ee5 | 2268 | { |
e69b0960 | 2269 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2270 | free_glyph_matrix (w->desired_matrix); |
2271 | free_glyph_matrix (w->current_matrix); | |
2272 | w->desired_matrix = w->current_matrix = NULL; | |
f00af5b1 | 2273 | fset_tool_bar_window (f, Qnil); |
5f5c8ee5 GM |
2274 | } |
2275 | ||
2276 | /* Release frame glyph matrices. Reset fields to zero in | |
2277 | case we are called a second time. */ | |
2278 | if (f->desired_matrix) | |
2279 | { | |
2280 | free_glyph_matrix (f->desired_matrix); | |
2281 | free_glyph_matrix (f->current_matrix); | |
2282 | f->desired_matrix = f->current_matrix = NULL; | |
2283 | } | |
2284 | ||
2285 | /* Release glyph pools. */ | |
2286 | if (f->desired_pool) | |
2287 | { | |
2288 | free_glyph_pool (f->desired_pool); | |
2289 | free_glyph_pool (f->current_pool); | |
2290 | f->desired_pool = f->current_pool = NULL; | |
2291 | } | |
177c0ea7 | 2292 | |
4d7e6e51 | 2293 | unblock_input (); |
5f5c8ee5 GM |
2294 | } |
2295 | } | |
2296 | ||
2297 | ||
2298 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2299 | function may be called with a null pointer, and it may be called on | |
2300 | the same tree more than once. */ | |
2301 | ||
2302 | void | |
971de7fb | 2303 | free_window_matrices (struct window *w) |
5f5c8ee5 GM |
2304 | { |
2305 | while (w) | |
2306 | { | |
d3d50620 DA |
2307 | if (!NILP (w->hchild)) |
2308 | free_window_matrices (XWINDOW (w->hchild)); | |
2309 | else if (!NILP (w->vchild)) | |
2310 | free_window_matrices (XWINDOW (w->vchild)); | |
177c0ea7 | 2311 | else |
5f5c8ee5 GM |
2312 | { |
2313 | /* This is a leaf window. Free its memory and reset fields | |
2314 | to zero in case this function is called a second time for | |
2315 | W. */ | |
2316 | free_glyph_matrix (w->current_matrix); | |
2317 | free_glyph_matrix (w->desired_matrix); | |
2318 | w->current_matrix = w->desired_matrix = NULL; | |
2319 | } | |
2320 | ||
2321 | /* Next window on same level. */ | |
d3d50620 | 2322 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2323 | } |
2324 | } | |
2325 | ||
2326 | ||
2327 | /* Check glyph memory leaks. This function is called from | |
2328 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2329 | exits. We therefore free all glyph memory for all active frames | |
2330 | explicitly and check that nothing is left allocated. */ | |
2331 | ||
2332 | void | |
971de7fb | 2333 | check_glyph_memory (void) |
5f5c8ee5 GM |
2334 | { |
2335 | Lisp_Object tail, frame; | |
2336 | ||
2337 | /* Free glyph memory for all frames. */ | |
2338 | FOR_EACH_FRAME (tail, frame) | |
2339 | free_glyphs (XFRAME (frame)); | |
2340 | ||
2341 | /* Check that nothing is left allocated. */ | |
2342 | if (glyph_matrix_count) | |
1088b922 | 2343 | emacs_abort (); |
5f5c8ee5 | 2344 | if (glyph_pool_count) |
1088b922 | 2345 | emacs_abort (); |
5f5c8ee5 GM |
2346 | } |
2347 | ||
2348 | ||
2349 | \f | |
2350 | /********************************************************************** | |
2351 | Building a Frame Matrix | |
2352 | **********************************************************************/ | |
2353 | ||
2354 | /* Most of the redisplay code works on glyph matrices attached to | |
2355 | windows. This is a good solution most of the time, but it is not | |
2356 | suitable for terminal code. Terminal output functions cannot rely | |
2357 | on being able to set an arbitrary terminal window. Instead they | |
2358 | must be provided with a view of the whole frame, i.e. the whole | |
2359 | screen. We build such a view by constructing a frame matrix from | |
2360 | window matrices in this section. | |
2361 | ||
2362 | Windows that must be updated have their must_be_update_p flag set. | |
2363 | For all such windows, their desired matrix is made part of the | |
2364 | desired frame matrix. For other windows, their current matrix is | |
2365 | made part of the desired frame matrix. | |
2366 | ||
2367 | +-----------------+----------------+ | |
2368 | | desired | desired | | |
2369 | | | | | |
2370 | +-----------------+----------------+ | |
2371 | | current | | |
2372 | | | | |
2373 | +----------------------------------+ | |
2374 | ||
2375 | Desired window matrices can be made part of the frame matrix in a | |
2376 | cheap way: We exploit the fact that the desired frame matrix and | |
2377 | desired window matrices share their glyph memory. This is not | |
2378 | possible for current window matrices. Their glyphs are copied to | |
2379 | the desired frame matrix. The latter is equivalent to | |
2380 | preserve_other_columns in the old redisplay. | |
2381 | ||
2382 | Used glyphs counters for frame matrix rows are the result of adding | |
2383 | up glyph lengths of the window matrices. A line in the frame | |
2384 | matrix is enabled, if a corresponding line in a window matrix is | |
2385 | enabled. | |
177c0ea7 | 2386 | |
5f5c8ee5 GM |
2387 | After building the desired frame matrix, it will be passed to |
2388 | terminal code, which will manipulate both the desired and current | |
2389 | frame matrix. Changes applied to the frame's current matrix have | |
2390 | to be visible in current window matrices afterwards, of course. | |
2391 | ||
2392 | This problem is solved like this: | |
2393 | ||
2394 | 1. Window and frame matrices share glyphs. Window matrices are | |
2395 | constructed in a way that their glyph contents ARE the glyph | |
2396 | contents needed in a frame matrix. Thus, any modification of | |
2397 | glyphs done in terminal code will be reflected in window matrices | |
2398 | automatically. | |
177c0ea7 | 2399 | |
5f5c8ee5 GM |
2400 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2401 | intercepted by hook functions so that corresponding row operations | |
2402 | on window matrices can be performed. This is necessary because we | |
2403 | use pointers to glyphs in glyph row structures. To satisfy the | |
2404 | assumption of point 1 above that glyphs are updated implicitly in | |
2405 | window matrices when they are manipulated via the frame matrix, | |
2406 | window and frame matrix must of course agree where to find the | |
2407 | glyphs for their rows. Possible manipulations that must be | |
2408 | mirrored are assignments of rows of the desired frame matrix to the | |
2409 | current frame matrix and scrolling the current frame matrix. */ | |
2410 | ||
2411 | /* Build frame F's desired matrix from window matrices. Only windows | |
2412 | which have the flag must_be_updated_p set have to be updated. Menu | |
2413 | bar lines of a frame are not covered by window matrices, so make | |
2414 | sure not to touch them in this function. */ | |
2415 | ||
2416 | static void | |
971de7fb | 2417 | build_frame_matrix (struct frame *f) |
5f5c8ee5 GM |
2418 | { |
2419 | int i; | |
2420 | ||
2421 | /* F must have a frame matrix when this function is called. */ | |
a54e2c05 | 2422 | eassert (!FRAME_WINDOW_P (f)); |
177c0ea7 | 2423 | |
5f5c8ee5 GM |
2424 | /* Clear all rows in the frame matrix covered by window matrices. |
2425 | Menu bar lines are not covered by windows. */ | |
2426 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2427 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2428 | ||
2429 | /* Build the matrix by walking the window tree. */ | |
2430 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2431 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2432 | } | |
2433 | ||
2434 | ||
2435 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2436 | matrices. W is the root of a window tree. */ | |
2437 | ||
2438 | static void | |
971de7fb | 2439 | build_frame_matrix_from_window_tree (struct glyph_matrix *matrix, struct window *w) |
5f5c8ee5 GM |
2440 | { |
2441 | while (w) | |
2442 | { | |
d3d50620 DA |
2443 | if (!NILP (w->hchild)) |
2444 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->hchild)); | |
2445 | else if (!NILP (w->vchild)) | |
2446 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->vchild)); | |
5f5c8ee5 GM |
2447 | else |
2448 | build_frame_matrix_from_leaf_window (matrix, w); | |
2449 | ||
d3d50620 | 2450 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2451 | } |
2452 | } | |
2453 | ||
2454 | ||
2455 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2456 | desired frame matrix built. W is a leaf window whose desired or | |
2457 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2458 | must_be_updated_p determines which matrix it contributes to | |
59ea14cd | 2459 | FRAME_MATRIX. If W->must_be_updated_p, W's desired matrix |
5f5c8ee5 GM |
2460 | is added to FRAME_MATRIX, otherwise W's current matrix is added. |
2461 | Adding a desired matrix means setting up used counters and such in | |
2462 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2463 | means copying glyphs. The latter case corresponds to | |
2464 | preserve_other_columns in the old redisplay. */ | |
2465 | ||
2466 | static void | |
971de7fb | 2467 | build_frame_matrix_from_leaf_window (struct glyph_matrix *frame_matrix, struct window *w) |
5f5c8ee5 GM |
2468 | { |
2469 | struct glyph_matrix *window_matrix; | |
2470 | int window_y, frame_y; | |
2471 | /* If non-zero, a glyph to insert at the right border of W. */ | |
3fc809e2 KS |
2472 | GLYPH right_border_glyph; |
2473 | ||
2474 | SET_GLYPH_FROM_CHAR (right_border_glyph, 0); | |
5f5c8ee5 GM |
2475 | |
2476 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2477 | if (w->must_be_updated_p) | |
2478 | { | |
2479 | window_matrix = w->desired_matrix; | |
2480 | ||
2481 | /* Decide whether we want to add a vertical border glyph. */ | |
2482 | if (!WINDOW_RIGHTMOST_P (w)) | |
2483 | { | |
2484 | struct Lisp_Char_Table *dp = window_display_table (w); | |
3fc809e2 | 2485 | Lisp_Object gc; |
b4e49aee | 2486 | |
3fc809e2 KS |
2487 | SET_GLYPH_FROM_CHAR (right_border_glyph, '|'); |
2488 | if (dp | |
d311d28c | 2489 | && (gc = DISP_BORDER_GLYPH (dp), GLYPH_CODE_P (gc))) |
3fc809e2 KS |
2490 | { |
2491 | SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph, gc); | |
2492 | spec_glyph_lookup_face (w, &right_border_glyph); | |
2493 | } | |
b4e49aee | 2494 | |
3fc809e2 KS |
2495 | if (GLYPH_FACE (right_border_glyph) <= 0) |
2496 | SET_GLYPH_FACE (right_border_glyph, VERTICAL_BORDER_FACE_ID); | |
5f5c8ee5 GM |
2497 | } |
2498 | } | |
2499 | else | |
2500 | window_matrix = w->current_matrix; | |
2501 | ||
2502 | /* For all rows in the window matrix and corresponding rows in the | |
2503 | frame matrix. */ | |
2504 | window_y = 0; | |
2505 | frame_y = window_matrix->matrix_y; | |
2506 | while (window_y < window_matrix->nrows) | |
2507 | { | |
2508 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2509 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
59ea14cd | 2510 | bool current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2511 | |
2512 | /* Fill up the frame row with spaces up to the left margin of the | |
2513 | window row. */ | |
2514 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2515 | ||
2516 | /* Fill up areas in the window matrix row with spaces. */ | |
2517 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2518 | |
2519 | /* If only part of W's desired matrix has been built, and | |
2520 | window_row wasn't displayed, use the corresponding current | |
2521 | row instead. */ | |
2522 | if (window_matrix == w->desired_matrix | |
2523 | && !window_row->enabled_p) | |
2524 | { | |
2525 | window_row = w->current_matrix->rows + window_y; | |
2526 | current_row_p = 1; | |
2527 | } | |
177c0ea7 | 2528 | |
2a8bd25f | 2529 | if (current_row_p) |
5f5c8ee5 | 2530 | { |
2a8bd25f | 2531 | /* Copy window row to frame row. */ |
72af86bd AS |
2532 | memcpy (frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, |
2533 | window_row->glyphs[0], | |
2534 | window_matrix->matrix_w * sizeof (struct glyph)); | |
5f5c8ee5 GM |
2535 | } |
2536 | else | |
2537 | { | |
a54e2c05 | 2538 | eassert (window_row->enabled_p); |
177c0ea7 | 2539 | |
2a8bd25f GM |
2540 | /* Only when a desired row has been displayed, we want |
2541 | the corresponding frame row to be updated. */ | |
2542 | frame_row->enabled_p = 1; | |
177c0ea7 | 2543 | |
5f5c8ee5 GM |
2544 | /* Maybe insert a vertical border between horizontally adjacent |
2545 | windows. */ | |
3fc809e2 | 2546 | if (GLYPH_CHAR (right_border_glyph) != 0) |
5f5c8ee5 GM |
2547 | { |
2548 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2549 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2550 | } | |
2551 | ||
e509cfa6 | 2552 | #ifdef GLYPH_DEBUG |
a13396c9 GM |
2553 | /* Window row window_y must be a slice of frame row |
2554 | frame_y. */ | |
a54e2c05 | 2555 | eassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2556 | |
5f5c8ee5 GM |
2557 | /* If rows are in sync, we don't have to copy glyphs because |
2558 | frame and window share glyphs. */ | |
177c0ea7 | 2559 | |
a38634ff | 2560 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2561 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2562 | #endif |
5f5c8ee5 GM |
2563 | } |
2564 | ||
2565 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2566 | up with spaces, and visit leaf windows from left to right it | |
2567 | can be done simply. */ | |
177c0ea7 | 2568 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2569 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2570 | ||
5f5c8ee5 GM |
2571 | /* Next row. */ |
2572 | ++window_y; | |
2573 | ++frame_y; | |
2574 | } | |
2575 | } | |
2576 | ||
5f81871e RS |
2577 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2578 | ID, return a glyph that has a realized face ID. | |
2579 | This is used for glyphs displayed specially and not part of the text; | |
2580 | for instance, vertical separators, truncation markers, etc. */ | |
2581 | ||
3fc809e2 | 2582 | void |
971de7fb | 2583 | spec_glyph_lookup_face (struct window *w, GLYPH *glyph) |
5f81871e | 2584 | { |
3fc809e2 | 2585 | int lface_id = GLYPH_FACE (*glyph); |
5f81871e RS |
2586 | /* Convert the glyph's specified face to a realized (cache) face. */ |
2587 | if (lface_id > 0) | |
2588 | { | |
d3d50620 | 2589 | int face_id = merge_faces (XFRAME (w->frame), |
5f81871e | 2590 | Qt, lface_id, DEFAULT_FACE_ID); |
3fc809e2 | 2591 | SET_GLYPH_FACE (*glyph, face_id); |
5f81871e | 2592 | } |
5f81871e | 2593 | } |
5f5c8ee5 GM |
2594 | |
2595 | /* Add spaces to a glyph row ROW in a window matrix. | |
2596 | ||
2597 | Each row has the form: | |
2598 | ||
2599 | +---------+-----------------------------+------------+ | |
2600 | | left | text | right | | |
2601 | +---------+-----------------------------+------------+ | |
2602 | ||
2603 | Left and right marginal areas are optional. This function adds | |
2604 | spaces to areas so that there are no empty holes between areas. | |
2605 | In other words: If the right area is not empty, the text area | |
2606 | is filled up with spaces up to the right area. If the text area | |
2607 | is not empty, the left area is filled up. | |
2608 | ||
2609 | To be called for frame-based redisplay, only. */ | |
2610 | ||
2611 | static void | |
971de7fb | 2612 | fill_up_glyph_row_with_spaces (struct glyph_row *row) |
5f5c8ee5 GM |
2613 | { |
2614 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2615 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2616 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2617 | } | |
2618 | ||
2619 | ||
2620 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2621 | frame-based redisplay only. */ | |
2622 | ||
2623 | static void | |
971de7fb | 2624 | fill_up_glyph_row_area_with_spaces (struct glyph_row *row, int area) |
5f5c8ee5 GM |
2625 | { |
2626 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2627 | { | |
2628 | struct glyph *end = row->glyphs[area + 1]; | |
2629 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2630 | ||
2631 | while (text < end) | |
2632 | *text++ = space_glyph; | |
2633 | row->used[area] = text - row->glyphs[area]; | |
2634 | } | |
2635 | } | |
2636 | ||
2637 | ||
2638 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2639 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2640 | ||
2641 | static void | |
971de7fb | 2642 | fill_up_frame_row_with_spaces (struct glyph_row *row, int upto) |
5f5c8ee5 GM |
2643 | { |
2644 | int i = row->used[TEXT_AREA]; | |
2645 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2646 | |
5f5c8ee5 GM |
2647 | while (i < upto) |
2648 | glyph[i++] = space_glyph; | |
2649 | ||
2650 | row->used[TEXT_AREA] = i; | |
2651 | } | |
2652 | ||
2653 | ||
2654 | \f | |
2655 | /********************************************************************** | |
2656 | Mirroring operations on frame matrices in window matrices | |
2657 | **********************************************************************/ | |
2658 | ||
2659 | /* Set frame being updated via frame-based redisplay to F. This | |
2660 | function must be called before updates to make explicit that we are | |
2661 | working on frame matrices or not. */ | |
2662 | ||
b0ab8123 | 2663 | static void |
971de7fb | 2664 | set_frame_matrix_frame (struct frame *f) |
5f5c8ee5 GM |
2665 | { |
2666 | frame_matrix_frame = f; | |
2667 | } | |
2668 | ||
2669 | ||
2670 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2671 | DESIRED_MATRIX is the desired matrix corresponding to | |
2672 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2673 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2674 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2675 | done in frame matrices, and that we have to perform analogous | |
2676 | operations in window matrices of frame_matrix_frame. */ | |
2677 | ||
b0ab8123 | 2678 | static void |
971de7fb | 2679 | make_current (struct glyph_matrix *desired_matrix, struct glyph_matrix *current_matrix, int row) |
5f5c8ee5 GM |
2680 | { |
2681 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2682 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
59ea14cd | 2683 | bool mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2684 | |
2685 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2686 | between both rows, and does a structure assignment otherwise. */ | |
2687 | assign_row (current_row, desired_row); | |
2688 | ||
2689 | /* Enable current_row to mark it as valid. */ | |
2690 | current_row->enabled_p = 1; | |
e876ff42 | 2691 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2692 | |
2693 | /* If we are called on frame matrices, perform analogous operations | |
2694 | for window matrices. */ | |
2695 | if (frame_matrix_frame) | |
e69b0960 | 2696 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); |
5f5c8ee5 GM |
2697 | } |
2698 | ||
2699 | ||
2700 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2701 | W's frame which has been made current (by swapping pointers between | |
2702 | current and desired matrix). Perform analogous operations in the | |
2703 | matrices of leaf windows in the window tree rooted at W. */ | |
2704 | ||
2705 | static void | |
971de7fb | 2706 | mirror_make_current (struct window *w, int frame_row) |
5f5c8ee5 GM |
2707 | { |
2708 | while (w) | |
2709 | { | |
d3d50620 DA |
2710 | if (!NILP (w->hchild)) |
2711 | mirror_make_current (XWINDOW (w->hchild), frame_row); | |
2712 | else if (!NILP (w->vchild)) | |
2713 | mirror_make_current (XWINDOW (w->vchild), frame_row); | |
5f5c8ee5 GM |
2714 | else |
2715 | { | |
2716 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2717 | here because the checks performed in debug mode there | |
2718 | will not allow the conversion. */ | |
2719 | int row = frame_row - w->desired_matrix->matrix_y; | |
2720 | ||
2721 | /* If FRAME_ROW is within W, assign the desired row to the | |
2722 | current row (exchanging glyph pointers). */ | |
2723 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
2724 | { | |
2725 | struct glyph_row *current_row | |
2726 | = MATRIX_ROW (w->current_matrix, row); | |
2727 | struct glyph_row *desired_row | |
2728 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
2729 | |
2730 | if (desired_row->enabled_p) | |
2731 | assign_row (current_row, desired_row); | |
2732 | else | |
2733 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 | 2734 | current_row->enabled_p = 1; |
d009ae66 EZ |
2735 | |
2736 | /* Set the Y coordinate of the mode/header line's row. | |
2737 | It is needed in draw_row_with_mouse_face to find the | |
2738 | screen coordinates. (Window-based redisplay sets | |
2739 | this in update_window, but no one seems to do that | |
2740 | for frame-based redisplay.) */ | |
2741 | if (current_row->mode_line_p) | |
2742 | current_row->y = row; | |
5f5c8ee5 GM |
2743 | } |
2744 | } | |
177c0ea7 | 2745 | |
d3d50620 | 2746 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2747 | } |
2748 | } | |
2749 | ||
2750 | ||
2751 | /* Perform row dance after scrolling. We are working on the range of | |
2752 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
2753 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
2754 | row I in the range 0 <= I < NLINES, the index of the original line | |
2755 | to move to I. This index is relative to the row range, i.e. 0 <= | |
2756 | index < NLINES. RETAINED_P is a vector containing zero for each | |
2757 | row 0 <= I < NLINES which is empty. | |
2758 | ||
2759 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 2760 | |
5f5c8ee5 | 2761 | void |
6f704c76 DN |
2762 | mirrored_line_dance (struct glyph_matrix *matrix, int unchanged_at_top, int nlines, |
2763 | int *copy_from, char *retained_p) | |
5f5c8ee5 GM |
2764 | { |
2765 | /* A copy of original rows. */ | |
2766 | struct glyph_row *old_rows; | |
2767 | ||
2768 | /* Rows to assign to. */ | |
2769 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 2770 | |
5f5c8ee5 GM |
2771 | int i; |
2772 | ||
2773 | /* Make a copy of the original rows. */ | |
38182d90 | 2774 | old_rows = alloca (nlines * sizeof *old_rows); |
72af86bd | 2775 | memcpy (old_rows, new_rows, nlines * sizeof *old_rows); |
5f5c8ee5 GM |
2776 | |
2777 | /* Assign new rows, maybe clear lines. */ | |
2778 | for (i = 0; i < nlines; ++i) | |
2779 | { | |
59ea14cd | 2780 | bool enabled_before_p = new_rows[i].enabled_p; |
5f5c8ee5 | 2781 | |
a54e2c05 DA |
2782 | eassert (i + unchanged_at_top < matrix->nrows); |
2783 | eassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
5f5c8ee5 GM |
2784 | new_rows[i] = old_rows[copy_from[i]]; |
2785 | new_rows[i].enabled_p = enabled_before_p; | |
2786 | ||
2787 | /* RETAINED_P is zero for empty lines. */ | |
2788 | if (!retained_p[copy_from[i]]) | |
2789 | new_rows[i].enabled_p = 0; | |
2790 | } | |
2791 | ||
153a073c | 2792 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 | 2793 | if (frame_matrix_frame) |
e69b0960 | 2794 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), |
5f5c8ee5 GM |
2795 | unchanged_at_top, nlines, copy_from, retained_p); |
2796 | } | |
2797 | ||
2798 | ||
a13396c9 | 2799 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 2800 | the current frame matrix. */ |
a13396c9 GM |
2801 | |
2802 | static void | |
971de7fb | 2803 | sync_window_with_frame_matrix_rows (struct window *w) |
a13396c9 | 2804 | { |
d3d50620 | 2805 | struct frame *f = XFRAME (w->frame); |
a13396c9 | 2806 | struct glyph_row *window_row, *window_row_end, *frame_row; |
075c507b | 2807 | int left, right, x, width; |
a13396c9 | 2808 | |
5cb88111 | 2809 | /* Preconditions: W must be a leaf window on a tty frame. */ |
d3d50620 | 2810 | eassert (NILP (w->hchild) && NILP (w->vchild)); |
a54e2c05 | 2811 | eassert (!FRAME_WINDOW_P (f)); |
a13396c9 | 2812 | |
d3d50620 DA |
2813 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
2814 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
2815 | x = w->current_matrix->matrix_x; |
2816 | width = w->current_matrix->matrix_w; | |
2817 | ||
a13396c9 GM |
2818 | window_row = w->current_matrix->rows; |
2819 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 2820 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 2821 | |
5cb88111 | 2822 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 2823 | { |
5cb88111 GM |
2824 | window_row->glyphs[LEFT_MARGIN_AREA] |
2825 | = frame_row->glyphs[0] + x; | |
2826 | window_row->glyphs[TEXT_AREA] | |
2827 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
2828 | window_row->glyphs[LAST_AREA] | |
2829 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
2830 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
2831 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
2832 | } |
2833 | } | |
2834 | ||
2835 | ||
2836 | /* Return the window in the window tree rooted in W containing frame | |
2837 | row ROW. Value is null if none is found. */ | |
2838 | ||
09ad5a91 | 2839 | static struct window * |
971de7fb | 2840 | frame_row_to_window (struct window *w, int row) |
a13396c9 GM |
2841 | { |
2842 | struct window *found = NULL; | |
177c0ea7 | 2843 | |
a13396c9 GM |
2844 | while (w && !found) |
2845 | { | |
d3d50620 DA |
2846 | if (!NILP (w->hchild)) |
2847 | found = frame_row_to_window (XWINDOW (w->hchild), row); | |
2848 | else if (!NILP (w->vchild)) | |
2849 | found = frame_row_to_window (XWINDOW (w->vchild), row); | |
7df02016 KS |
2850 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
2851 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 2852 | found = w; |
177c0ea7 | 2853 | |
d3d50620 | 2854 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
a13396c9 GM |
2855 | } |
2856 | ||
2857 | return found; | |
2858 | } | |
2859 | ||
2860 | ||
5f5c8ee5 GM |
2861 | /* Perform a line dance in the window tree rooted at W, after |
2862 | scrolling a frame matrix in mirrored_line_dance. | |
2863 | ||
2864 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
2865 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
2866 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
2867 | I < NLINES, the index of the original line to move to I. This | |
2868 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
2869 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
2870 | which is empty. */ | |
2871 | ||
2872 | static void | |
971de7fb | 2873 | mirror_line_dance (struct window *w, int unchanged_at_top, int nlines, int *copy_from, char *retained_p) |
5f5c8ee5 GM |
2874 | { |
2875 | while (w) | |
2876 | { | |
d3d50620 DA |
2877 | if (!NILP (w->hchild)) |
2878 | mirror_line_dance (XWINDOW (w->hchild), unchanged_at_top, | |
5f5c8ee5 | 2879 | nlines, copy_from, retained_p); |
d3d50620 DA |
2880 | else if (!NILP (w->vchild)) |
2881 | mirror_line_dance (XWINDOW (w->vchild), unchanged_at_top, | |
5f5c8ee5 GM |
2882 | nlines, copy_from, retained_p); |
2883 | else | |
2884 | { | |
2885 | /* W is a leaf window, and we are working on its current | |
2886 | matrix m. */ | |
2887 | struct glyph_matrix *m = w->current_matrix; | |
59ea14cd PE |
2888 | int i; |
2889 | bool sync_p = 0; | |
5f5c8ee5 GM |
2890 | struct glyph_row *old_rows; |
2891 | ||
2892 | /* Make a copy of the original rows of matrix m. */ | |
38182d90 | 2893 | old_rows = alloca (m->nrows * sizeof *old_rows); |
72af86bd | 2894 | memcpy (old_rows, m->rows, m->nrows * sizeof *old_rows); |
5f5c8ee5 GM |
2895 | |
2896 | for (i = 0; i < nlines; ++i) | |
2897 | { | |
2898 | /* Frame relative line assigned to. */ | |
2899 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 2900 | |
5f5c8ee5 GM |
2901 | /* Frame relative line assigned. */ |
2902 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 2903 | |
5f5c8ee5 GM |
2904 | /* Window relative line assigned to. */ |
2905 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 2906 | |
5f5c8ee5 GM |
2907 | /* Window relative line assigned. */ |
2908 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 2909 | |
5f5c8ee5 | 2910 | /* Is assigned line inside window? */ |
59ea14cd | 2911 | bool from_inside_window_p |
5f5c8ee5 | 2912 | = window_from >= 0 && window_from < m->matrix_h; |
177c0ea7 | 2913 | |
a13396c9 | 2914 | /* Is assigned to line inside window? */ |
59ea14cd | 2915 | bool to_inside_window_p |
a13396c9 | 2916 | = window_to >= 0 && window_to < m->matrix_h; |
177c0ea7 | 2917 | |
a13396c9 | 2918 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 2919 | { |
5f5c8ee5 GM |
2920 | /* Do the assignment. The enabled_p flag is saved |
2921 | over the assignment because the old redisplay did | |
2922 | that. */ | |
59ea14cd | 2923 | bool enabled_before_p = m->rows[window_to].enabled_p; |
5f5c8ee5 GM |
2924 | m->rows[window_to] = old_rows[window_from]; |
2925 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 2926 | |
5f5c8ee5 GM |
2927 | /* If frame line is empty, window line is empty, too. */ |
2928 | if (!retained_p[copy_from[i]]) | |
2929 | m->rows[window_to].enabled_p = 0; | |
2930 | } | |
a13396c9 GM |
2931 | else if (to_inside_window_p) |
2932 | { | |
2933 | /* A copy between windows. This is an infrequent | |
2934 | case not worth optimizing. */ | |
d3d50620 | 2935 | struct frame *f = XFRAME (w->frame); |
a13396c9 GM |
2936 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
2937 | struct window *w2; | |
2938 | struct glyph_matrix *m2; | |
2939 | int m2_from; | |
2940 | ||
fe8b8401 | 2941 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
2942 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
2943 | -nw', FROM_FRAME sometimes has no associated window. | |
2944 | This check avoids a segfault if W2 is null. */ | |
2945 | if (w2) | |
2946 | { | |
2947 | m2 = w2->current_matrix; | |
2948 | m2_from = frame_from - m2->matrix_y; | |
2949 | copy_row_except_pointers (m->rows + window_to, | |
2950 | m2->rows + m2_from); | |
2951 | ||
2952 | /* If frame line is empty, window line is empty, too. */ | |
2953 | if (!retained_p[copy_from[i]]) | |
2954 | m->rows[window_to].enabled_p = 0; | |
2955 | } | |
a13396c9 GM |
2956 | sync_p = 1; |
2957 | } | |
2958 | else if (from_inside_window_p) | |
2959 | sync_p = 1; | |
5f5c8ee5 | 2960 | } |
a13396c9 GM |
2961 | |
2962 | /* If there was a copy between windows, make sure glyph | |
2963 | pointers are in sync with the frame matrix. */ | |
2964 | if (sync_p) | |
2965 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 2966 | |
5f5c8ee5 GM |
2967 | /* Check that no pointers are lost. */ |
2968 | CHECK_MATRIX (m); | |
2969 | } | |
2970 | ||
2971 | /* Next window on same level. */ | |
d3d50620 | 2972 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2973 | } |
2974 | } | |
2975 | ||
2976 | ||
e509cfa6 | 2977 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
2978 | |
2979 | /* Check that window and frame matrices agree about their | |
2980 | understanding where glyphs of the rows are to find. For each | |
2981 | window in the window tree rooted at W, check that rows in the | |
2982 | matrices of leaf window agree with their frame matrices about | |
2983 | glyph pointers. */ | |
2984 | ||
85fece3e | 2985 | static void |
59fc5cf9 | 2986 | check_window_matrix_pointers (struct window *w) |
5f5c8ee5 GM |
2987 | { |
2988 | while (w) | |
2989 | { | |
d3d50620 DA |
2990 | if (!NILP (w->hchild)) |
2991 | check_window_matrix_pointers (XWINDOW (w->hchild)); | |
2992 | else if (!NILP (w->vchild)) | |
2993 | check_window_matrix_pointers (XWINDOW (w->vchild)); | |
5f5c8ee5 | 2994 | else |
60a8948a | 2995 | { |
d3d50620 | 2996 | struct frame *f = XFRAME (w->frame); |
5f5c8ee5 GM |
2997 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); |
2998 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 2999 | } |
177c0ea7 | 3000 | |
d3d50620 | 3001 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
3002 | } |
3003 | } | |
3004 | ||
3005 | ||
3006 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
3007 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
3008 | each row in WINDOW_MATRIX check that it's a slice of the | |
3009 | corresponding frame row. If it isn't, abort. */ | |
3010 | ||
3011 | static void | |
59fc5cf9 AS |
3012 | check_matrix_pointers (struct glyph_matrix *window_matrix, |
3013 | struct glyph_matrix *frame_matrix) | |
5f5c8ee5 GM |
3014 | { |
3015 | /* Row number in WINDOW_MATRIX. */ | |
3016 | int i = 0; | |
3017 | ||
3018 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
3019 | int j = window_matrix->matrix_y; | |
3020 | ||
177c0ea7 | 3021 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
3022 | slice of the row in the frame matrix. If it isn't we didn't |
3023 | mirror an operation on the frame matrix correctly. */ | |
3024 | while (i < window_matrix->nrows) | |
3025 | { | |
3026 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
3027 | frame_matrix->rows + j)) | |
1088b922 | 3028 | emacs_abort (); |
5f5c8ee5 GM |
3029 | ++i, ++j; |
3030 | } | |
3031 | } | |
3032 | ||
e509cfa6 | 3033 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
3034 | |
3035 | ||
3036 | \f | |
3037 | /********************************************************************** | |
3038 | VPOS and HPOS translations | |
3039 | **********************************************************************/ | |
3040 | ||
e509cfa6 | 3041 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
3042 | |
3043 | /* Translate vertical position VPOS which is relative to window W to a | |
3044 | vertical position relative to W's frame. */ | |
3045 | ||
3046 | static int | |
59fc5cf9 | 3047 | window_to_frame_vpos (struct window *w, int vpos) |
5f5c8ee5 | 3048 | { |
d3d50620 | 3049 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
a54e2c05 | 3050 | eassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); |
7df02016 | 3051 | vpos += WINDOW_TOP_EDGE_LINE (w); |
d3d50620 | 3052 | eassert (vpos >= 0 && vpos <= FRAME_LINES (XFRAME (w->frame))); |
5f5c8ee5 GM |
3053 | return vpos; |
3054 | } | |
3055 | ||
3056 | ||
3057 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 3058 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
3059 | |
3060 | static int | |
59fc5cf9 | 3061 | window_to_frame_hpos (struct window *w, int hpos) |
5f5c8ee5 | 3062 | { |
d3d50620 | 3063 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 3064 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
3065 | return hpos; |
3066 | } | |
177c0ea7 | 3067 | |
5f5c8ee5 GM |
3068 | #endif /* GLYPH_DEBUG */ |
3069 | ||
3070 | ||
3071 | \f | |
3072 | /********************************************************************** | |
3073 | Redrawing Frames | |
3074 | **********************************************************************/ | |
3075 | ||
a7ca3326 | 3076 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
7ee72033 | 3077 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. */) |
5842a27b | 3078 | (Lisp_Object frame) |
5f5c8ee5 GM |
3079 | { |
3080 | struct frame *f; | |
3081 | ||
b7826503 | 3082 | CHECK_LIVE_FRAME (frame); |
5f5c8ee5 GM |
3083 | f = XFRAME (frame); |
3084 | ||
3085 | /* Ignore redraw requests, if frame has no glyphs yet. | |
3086 | (Implementation note: It still has to be checked why we are | |
3087 | called so early here). */ | |
3088 | if (!glyphs_initialized_initially_p) | |
3089 | return Qnil; | |
3090 | ||
3091 | update_begin (f); | |
3224dac1 | 3092 | #ifdef MSDOS |
f2adda5e | 3093 | if (FRAME_MSDOS_P (f)) |
79d39b69 | 3094 | FRAME_TERMINAL (f)->set_terminal_modes_hook (FRAME_TERMINAL (f)); |
3224dac1 | 3095 | #endif |
385ed61f | 3096 | clear_frame (f); |
5f5c8ee5 GM |
3097 | clear_current_matrices (f); |
3098 | update_end (f); | |
daf01701 | 3099 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3100 | fflush (FRAME_TTY (f)->output); |
5f5c8ee5 GM |
3101 | windows_or_buffers_changed++; |
3102 | /* Mark all windows as inaccurate, so that every window will have | |
3103 | its redisplay done. */ | |
3104 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
3105 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
3106 | f->garbaged = 0; | |
3107 | return Qnil; | |
3108 | } | |
3109 | ||
3110 | ||
3111 | /* Redraw frame F. This is nothing more than a call to the Lisp | |
3112 | function redraw-frame. */ | |
3113 | ||
3114 | void | |
971de7fb | 3115 | redraw_frame (struct frame *f) |
5f5c8ee5 GM |
3116 | { |
3117 | Lisp_Object frame; | |
3118 | XSETFRAME (frame, f); | |
3119 | Fredraw_frame (frame); | |
3120 | } | |
3121 | ||
3122 | ||
3123 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
7ee72033 | 3124 | doc: /* Clear and redisplay all visible frames. */) |
5842a27b | 3125 | (void) |
5f5c8ee5 GM |
3126 | { |
3127 | Lisp_Object tail, frame; | |
3128 | ||
3129 | FOR_EACH_FRAME (tail, frame) | |
3130 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
3131 | Fredraw_frame (frame); | |
3132 | ||
3133 | return Qnil; | |
3134 | } | |
3135 | ||
3136 | ||
5f5c8ee5 | 3137 | \f |
5f5c8ee5 GM |
3138 | /*********************************************************************** |
3139 | Frame Update | |
3140 | ***********************************************************************/ | |
4588ec20 | 3141 | |
5f5c8ee5 | 3142 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 3143 | |
59ea14cd PE |
3144 | If FORCE_P, don't let redisplay be stopped by detecting pending input. |
3145 | If INHIBIT_HAIRY_ID_P, don't try scrolling. | |
177c0ea7 | 3146 | |
59ea14cd | 3147 | Value is true if redisplay was stopped due to pending input. */ |
4588ec20 | 3148 | |
59ea14cd PE |
3149 | bool |
3150 | update_frame (struct frame *f, bool force_p, bool inhibit_hairy_id_p) | |
5f5c8ee5 | 3151 | { |
59ea14cd PE |
3152 | /* True means display has been paused because of pending input. */ |
3153 | bool paused_p; | |
e69b0960 | 3154 | struct window *root_window = XWINDOW (f->root_window); |
5f5c8ee5 | 3155 | |
a2130dbb KS |
3156 | if (redisplay_dont_pause) |
3157 | force_p = 1; | |
a2130dbb KS |
3158 | else if (NILP (Vredisplay_preemption_period)) |
3159 | force_p = 1; | |
3160 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b | 3161 | { |
d012c62b | 3162 | double p = XFLOATINT (Vredisplay_preemption_period); |
d012c62b | 3163 | |
993d4ab6 KS |
3164 | if (detect_input_pending_ignore_squeezables ()) |
3165 | { | |
3166 | paused_p = 1; | |
3167 | goto do_pause; | |
3168 | } | |
3169 | ||
d35af63c | 3170 | preemption_period = EMACS_TIME_FROM_DOUBLE (p); |
e9a9ae03 PE |
3171 | preemption_next_check = add_emacs_time (current_emacs_time (), |
3172 | preemption_period); | |
d012c62b | 3173 | } |
d012c62b | 3174 | |
5f5c8ee5 | 3175 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3176 | { |
5f5c8ee5 GM |
3177 | /* We are working on window matrix basis. All windows whose |
3178 | flag must_be_updated_p is set have to be updated. */ | |
3179 | ||
3180 | /* Record that we are not working on frame matrices. */ | |
3181 | set_frame_matrix_frame (NULL); | |
3182 | ||
3183 | /* Update all windows in the window tree of F, maybe stopping | |
3184 | when pending input is detected. */ | |
3185 | update_begin (f); | |
3186 | ||
3187 | /* Update the menu bar on X frames that don't have toolkit | |
3188 | support. */ | |
e69b0960 DA |
3189 | if (WINDOWP (f->menu_bar_window)) |
3190 | update_window (XWINDOW (f->menu_bar_window), 1); | |
5f5c8ee5 GM |
3191 | |
3192 | /* Update the tool-bar window, if present. */ | |
e69b0960 | 3193 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3194 | { |
e69b0960 | 3195 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3196 | |
3197 | /* Update tool-bar window. */ | |
3198 | if (w->must_be_updated_p) | |
4588ec20 | 3199 | { |
153a073c PJ |
3200 | Lisp_Object tem; |
3201 | ||
5f5c8ee5 GM |
3202 | update_window (w, 1); |
3203 | w->must_be_updated_p = 0; | |
3204 | ||
3205 | /* Swap tool-bar strings. We swap because we want to | |
3206 | reuse strings. */ | |
e69b0960 | 3207 | tem = f->current_tool_bar_string; |
f00af5b1 PE |
3208 | fset_current_tool_bar_string (f, f->desired_tool_bar_string); |
3209 | fset_desired_tool_bar_string (f, tem); | |
4588ec20 JB |
3210 | } |
3211 | } | |
177c0ea7 | 3212 | |
5f5c8ee5 GM |
3213 | |
3214 | /* Update windows. */ | |
3215 | paused_p = update_window_tree (root_window, force_p); | |
3216 | update_end (f); | |
177c0ea7 | 3217 | |
6b61353c | 3218 | /* This flush is a performance bottleneck under X, |
e581a466 | 3219 | and it doesn't seem to be necessary anyway (in general). |
6b61353c | 3220 | It is necessary when resizing the window with the mouse, or |
e581a466 | 3221 | at least the fringes are not redrawn in a timely manner. ++kfs */ |
6b61353c | 3222 | if (f->force_flush_display_p) |
e581a466 KL |
3223 | { |
3224 | FRAME_RIF (f)->flush_display (f); | |
3225 | f->force_flush_display_p = 0; | |
3226 | } | |
4588ec20 | 3227 | } |
5f5c8ee5 GM |
3228 | else |
3229 | { | |
3230 | /* We are working on frame matrix basis. Set the frame on whose | |
3231 | frame matrix we operate. */ | |
3232 | set_frame_matrix_frame (f); | |
3233 | ||
868dd24b | 3234 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3235 | build_frame_matrix (f); |
177c0ea7 | 3236 | |
868dd24b GM |
3237 | /* Update the display */ |
3238 | update_begin (f); | |
5f5c8ee5 | 3239 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3240 | update_end (f); |
3241 | ||
7d2f1216 | 3242 | if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f)) |
3224dac1 | 3243 | { |
0b0d3e0b KL |
3244 | if (FRAME_TTY (f)->termscript) |
3245 | fflush (FRAME_TTY (f)->termscript); | |
7d2f1216 EZ |
3246 | if (FRAME_TERMCAP_P (f)) |
3247 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3248 | } |
868dd24b | 3249 | |
5f5c8ee5 | 3250 | /* Check window matrices for lost pointers. */ |
e509cfa6 | 3251 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
3252 | check_window_matrix_pointers (root_window); |
3253 | add_frame_display_history (f, paused_p); | |
3254 | #endif | |
5f5c8ee5 GM |
3255 | } |
3256 | ||
993d4ab6 | 3257 | do_pause: |
5f5c8ee5 GM |
3258 | /* Reset flags indicating that a window should be updated. */ |
3259 | set_window_update_flags (root_window, 0); | |
177c0ea7 | 3260 | |
868dd24b | 3261 | display_completed = !paused_p; |
5f5c8ee5 | 3262 | return paused_p; |
4588ec20 | 3263 | } |
5f5c8ee5 GM |
3264 | |
3265 | ||
4588ec20 | 3266 | \f |
5f5c8ee5 GM |
3267 | /************************************************************************ |
3268 | Window-based updates | |
3269 | ************************************************************************/ | |
3270 | ||
59ea14cd PE |
3271 | /* Perform updates in window tree rooted at W. |
3272 | If FORCE_P, don't stop updating if input is pending. */ | |
5f5c8ee5 | 3273 | |
59ea14cd PE |
3274 | static bool |
3275 | update_window_tree (struct window *w, bool force_p) | |
5f5c8ee5 | 3276 | { |
59ea14cd | 3277 | bool paused_p = 0; |
177c0ea7 | 3278 | |
5f5c8ee5 GM |
3279 | while (w && !paused_p) |
3280 | { | |
d3d50620 DA |
3281 | if (!NILP (w->hchild)) |
3282 | paused_p |= update_window_tree (XWINDOW (w->hchild), force_p); | |
3283 | else if (!NILP (w->vchild)) | |
3284 | paused_p |= update_window_tree (XWINDOW (w->vchild), force_p); | |
5f5c8ee5 GM |
3285 | else if (w->must_be_updated_p) |
3286 | paused_p |= update_window (w, force_p); | |
3287 | ||
d3d50620 | 3288 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
3289 | } |
3290 | ||
3291 | return paused_p; | |
3292 | } | |
3293 | ||
3294 | ||
59ea14cd PE |
3295 | /* Update window W if its flag must_be_updated_p is set. |
3296 | If FORCE_P, don't stop updating if input is pending. */ | |
5f5c8ee5 GM |
3297 | |
3298 | void | |
59ea14cd | 3299 | update_single_window (struct window *w, bool force_p) |
5f5c8ee5 GM |
3300 | { |
3301 | if (w->must_be_updated_p) | |
3302 | { | |
3303 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
3304 | ||
3305 | /* Record that this is not a frame-based redisplay. */ | |
3306 | set_frame_matrix_frame (NULL); | |
3307 | ||
a2130dbb KS |
3308 | if (redisplay_dont_pause) |
3309 | force_p = 1; | |
a2130dbb KS |
3310 | else if (NILP (Vredisplay_preemption_period)) |
3311 | force_p = 1; | |
3312 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b | 3313 | { |
d012c62b | 3314 | double p = XFLOATINT (Vredisplay_preemption_period); |
d35af63c | 3315 | preemption_period = EMACS_TIME_FROM_DOUBLE (p); |
e9a9ae03 PE |
3316 | preemption_next_check = add_emacs_time (current_emacs_time (), |
3317 | preemption_period); | |
d012c62b | 3318 | } |
d012c62b | 3319 | |
5f5c8ee5 GM |
3320 | /* Update W. */ |
3321 | update_begin (f); | |
3322 | update_window (w, force_p); | |
3323 | update_end (f); | |
4588ec20 | 3324 | |
5f5c8ee5 GM |
3325 | /* Reset flag in W. */ |
3326 | w->must_be_updated_p = 0; | |
3327 | } | |
3328 | } | |
4588ec20 | 3329 | |
93e023fc | 3330 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 3331 | |
408f5064 GM |
3332 | /* Redraw lines from the current matrix of window W that are |
3333 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
3334 | ||
3335 | static void | |
971de7fb | 3336 | redraw_overlapped_rows (struct window *w, int yb) |
408f5064 | 3337 | { |
d8ee7803 | 3338 | int i; |
fa971ac3 | 3339 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3fc809e2 | 3340 | |
408f5064 GM |
3341 | /* If rows overlapping others have been changed, the rows being |
3342 | overlapped have to be redrawn. This won't draw lines that have | |
3343 | already been drawn in update_window_line because overlapped_p in | |
3344 | desired rows is 0, so after row assignment overlapped_p in | |
3345 | current rows is 0. */ | |
3346 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
3347 | { | |
e876ff42 | 3348 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
3349 | |
3350 | if (!row->enabled_p) | |
3351 | break; | |
3352 | else if (row->mode_line_p) | |
3353 | continue; | |
177c0ea7 | 3354 | |
408f5064 GM |
3355 | if (row->overlapped_p) |
3356 | { | |
3357 | enum glyph_row_area area; | |
177c0ea7 | 3358 | |
408f5064 GM |
3359 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
3360 | { | |
3361 | updated_row = row; | |
3362 | updated_area = area; | |
fa971ac3 KL |
3363 | FRAME_RIF (f)->cursor_to (i, 0, row->y, |
3364 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 3365 | if (row->used[area]) |
fa971ac3 KL |
3366 | FRAME_RIF (f)->write_glyphs (row->glyphs[area], |
3367 | row->used[area]); | |
3368 | FRAME_RIF (f)->clear_end_of_line (-1); | |
408f5064 | 3369 | } |
177c0ea7 | 3370 | |
408f5064 GM |
3371 | row->overlapped_p = 0; |
3372 | } | |
3373 | ||
e876ff42 | 3374 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
3375 | break; |
3376 | } | |
3377 | } | |
3378 | ||
3379 | ||
3380 | /* Redraw lines from the current matrix of window W that overlap | |
3381 | others. YB is bottom-most y-position in W. */ | |
3382 | ||
3383 | static void | |
971de7fb | 3384 | redraw_overlapping_rows (struct window *w, int yb) |
408f5064 GM |
3385 | { |
3386 | int i, bottom_y; | |
3387 | struct glyph_row *row; | |
fa971ac3 | 3388 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
3fc809e2 | 3389 | |
408f5064 GM |
3390 | for (i = 0; i < w->current_matrix->nrows; ++i) |
3391 | { | |
3392 | row = w->current_matrix->rows + i; | |
3393 | ||
3394 | if (!row->enabled_p) | |
3395 | break; | |
3396 | else if (row->mode_line_p) | |
3397 | continue; | |
177c0ea7 | 3398 | |
408f5064 GM |
3399 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
3400 | ||
b4b2c2ca | 3401 | if (row->overlapping_p) |
408f5064 | 3402 | { |
41124e06 YM |
3403 | int overlaps = 0; |
3404 | ||
b4b2c2ca | 3405 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) && i > 0 |
41124e06 YM |
3406 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) |
3407 | overlaps |= OVERLAPS_PRED; | |
b4b2c2ca | 3408 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) && bottom_y < yb |
41124e06 YM |
3409 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) |
3410 | overlaps |= OVERLAPS_SUCC; | |
3411 | ||
3412 | if (overlaps) | |
3413 | { | |
3414 | if (row->used[LEFT_MARGIN_AREA]) | |
3415 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
3416 | ||
3417 | if (row->used[TEXT_AREA]) | |
3418 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
3419 | ||
3420 | if (row->used[RIGHT_MARGIN_AREA]) | |
3421 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
3422 | ||
c5e87d10 | 3423 | /* Record in neighbor rows that ROW overwrites part of |
41124e06 YM |
3424 | their display. */ |
3425 | if (overlaps & OVERLAPS_PRED) | |
3426 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
3427 | if (overlaps & OVERLAPS_SUCC) | |
3428 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
3429 | } | |
408f5064 GM |
3430 | } |
3431 | ||
3432 | if (bottom_y >= yb) | |
3433 | break; | |
3434 | } | |
3435 | } | |
3436 | ||
93e023fc KS |
3437 | #endif /* HAVE_WINDOW_SYSTEM */ |
3438 | ||
408f5064 | 3439 | |
09ad5a91 | 3440 | #if defined GLYPH_DEBUG && 0 |
93962bfa GM |
3441 | |
3442 | /* Check that no row in the current matrix of window W is enabled | |
3443 | which is below what's displayed in the window. */ | |
3444 | ||
09ad5a91 | 3445 | static void |
971de7fb | 3446 | check_current_matrix_flags (struct window *w) |
93962bfa | 3447 | { |
59ea14cd | 3448 | bool last_seen_p = 0; |
93962bfa GM |
3449 | int i, yb = window_text_bottom_y (w); |
3450 | ||
3451 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
3452 | { | |
3453 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
3454 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3455 | last_seen_p = 1; | |
3456 | else if (last_seen_p && row->enabled_p) | |
1088b922 | 3457 | emacs_abort (); |
93962bfa GM |
3458 | } |
3459 | } | |
3460 | ||
3461 | #endif /* GLYPH_DEBUG */ | |
3462 | ||
3463 | ||
59ea14cd PE |
3464 | /* Update display of window W. |
3465 | If FORCE_P, don't stop updating when input is pending. */ | |
5f5c8ee5 | 3466 | |
59ea14cd PE |
3467 | static bool |
3468 | update_window (struct window *w, bool force_p) | |
4588ec20 | 3469 | { |
5f5c8ee5 | 3470 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
59ea14cd | 3471 | bool paused_p; |
d012c62b | 3472 | #if !PERIODIC_PREEMPTION_CHECKING |
5f5c8ee5 | 3473 | int preempt_count = baud_rate / 2400 + 1; |
d012c62b | 3474 | #endif |
597cfb3f | 3475 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
e509cfa6 | 3476 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 3477 | /* Check that W's frame doesn't have glyph matrices. */ |
a54e2c05 | 3478 | eassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 3479 | #endif |
5f5c8ee5 GM |
3480 | |
3481 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb KS |
3482 | #if !PERIODIC_PREEMPTION_CHECKING |
3483 | if (!force_p) | |
a2d5fca0 | 3484 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3485 | #endif |
4588ec20 | 3486 | |
5f5c8ee5 GM |
3487 | /* If forced to complete the update, or if no input is pending, do |
3488 | the update. */ | |
8fd9a666 | 3489 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 3490 | { |
5f5c8ee5 GM |
3491 | struct glyph_row *row, *end; |
3492 | struct glyph_row *mode_line_row; | |
56974e03 | 3493 | struct glyph_row *header_line_row; |
59ea14cd PE |
3494 | int yb; |
3495 | bool changed_p = 0, mouse_face_overwritten_p = 0; | |
0bc32927 PE |
3496 | #if ! PERIODIC_PREEMPTION_CHECKING |
3497 | int n_updated = 0; | |
3498 | #endif | |
5f5c8ee5 GM |
3499 | |
3500 | rif->update_window_begin_hook (w); | |
3501 | yb = window_text_bottom_y (w); | |
5f5c8ee5 GM |
3502 | row = desired_matrix->rows; |
3503 | end = row + desired_matrix->nrows - 1; | |
177c0ea7 | 3504 | |
394305db EZ |
3505 | /* Take note of the header line, if there is one. We will |
3506 | update it below, after updating all of the window's lines. */ | |
5f5c8ee5 | 3507 | if (row->mode_line_p) |
56974e03 GM |
3508 | { |
3509 | header_line_row = row; | |
3510 | ++row; | |
3511 | } | |
3512 | else | |
3513 | header_line_row = NULL; | |
5f5c8ee5 GM |
3514 | |
3515 | /* Update the mode line, if necessary. */ | |
3516 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
3517 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
3518 | { | |
3519 | mode_line_row->y = yb; | |
3520 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
3521 | desired_matrix), |
3522 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3523 | } |
3524 | ||
3525 | /* Find first enabled row. Optimizations in redisplay_internal | |
3526 | may lead to an update with only one row enabled. There may | |
3527 | be also completely empty matrices. */ | |
3528 | while (row < end && !row->enabled_p) | |
3529 | ++row; | |
177c0ea7 | 3530 | |
bfdcafe1 | 3531 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 3532 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
3533 | { |
3534 | int rc = scrolling_window (w, header_line_row != NULL); | |
3535 | if (rc < 0) | |
3536 | { | |
3537 | /* All rows were found to be equal. */ | |
3538 | paused_p = 0; | |
3539 | goto set_cursor; | |
3540 | } | |
3541 | else if (rc > 0) | |
6b61353c KH |
3542 | { |
3543 | /* We've scrolled the display. */ | |
3544 | force_p = 1; | |
3545 | changed_p = 1; | |
3546 | } | |
5f5c8ee5 GM |
3547 | } |
3548 | ||
3549 | /* Update the rest of the lines. */ | |
0bc32927 | 3550 | for (; row < end && (force_p || !input_pending); ++row) |
394305db EZ |
3551 | /* scrolling_window resets the enabled_p flag of the rows it |
3552 | reuses from current_matrix. */ | |
b7412313 | 3553 | if (row->enabled_p) |
5f5c8ee5 GM |
3554 | { |
3555 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
3556 | int i; | |
177c0ea7 | 3557 | |
153a073c | 3558 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
3559 | detect_input_pending. If it's done too often, |
3560 | scrolling large windows with repeated scroll-up | |
3561 | commands will too quickly pause redisplay. */ | |
d012c62b KS |
3562 | #if PERIODIC_PREEMPTION_CHECKING |
3563 | if (!force_p) | |
3564 | { | |
e9a9ae03 | 3565 | EMACS_TIME tm = current_emacs_time (); |
d35af63c | 3566 | if (EMACS_TIME_LT (preemption_next_check, tm)) |
d012c62b | 3567 | { |
e9a9ae03 PE |
3568 | preemption_next_check = add_emacs_time (tm, |
3569 | preemption_period); | |
993d4ab6 KS |
3570 | if (detect_input_pending_ignore_squeezables ()) |
3571 | break; | |
d012c62b KS |
3572 | } |
3573 | } | |
3574 | #else | |
e87b8809 | 3575 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 3576 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3577 | #endif |
e876ff42 GM |
3578 | changed_p |= update_window_line (w, vpos, |
3579 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3580 | |
3581 | /* Mark all rows below the last visible one in the current | |
3582 | matrix as invalid. This is necessary because of | |
3583 | variable line heights. Consider the case of three | |
3584 | successive redisplays, where the first displays 5 | |
3585 | lines, the second 3 lines, and the third 5 lines again. | |
3586 | If the second redisplay wouldn't mark rows in the | |
3587 | current matrix invalid, the third redisplay might be | |
3588 | tempted to optimize redisplay based on lines displayed | |
3589 | in the first redisplay. */ | |
3590 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3591 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
3592 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
3593 | } | |
3594 | ||
3595 | /* Was display preempted? */ | |
3596 | paused_p = row < end; | |
177c0ea7 | 3597 | |
56974e03 | 3598 | set_cursor: |
177c0ea7 | 3599 | |
6b61353c KH |
3600 | /* Update the header line after scrolling because a new header |
3601 | line would otherwise overwrite lines at the top of the window | |
3602 | that can be scrolled. */ | |
3603 | if (header_line_row && header_line_row->enabled_p) | |
3604 | { | |
3605 | header_line_row->y = 0; | |
3606 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
6b61353c KH |
3607 | } |
3608 | ||
153a073c | 3609 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
3610 | if (!paused_p && !w->pseudo_window_p) |
3611 | { | |
93e023fc | 3612 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
3613 | if (changed_p && rif->fix_overlapping_area) |
3614 | { | |
3615 | redraw_overlapped_rows (w, yb); | |
3616 | redraw_overlapping_rows (w, yb); | |
3617 | } | |
93e023fc | 3618 | #endif |
177c0ea7 | 3619 | |
5f5c8ee5 GM |
3620 | /* Make cursor visible at cursor position of W. */ |
3621 | set_window_cursor_after_update (w); | |
3622 | ||
e876ff42 GM |
3623 | #if 0 /* Check that current matrix invariants are satisfied. This is |
3624 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
3625 | IF_DEBUG (check_matrix_invariants (w)); |
3626 | #endif | |
4588ec20 | 3627 | } |
5f5c8ee5 | 3628 | |
e509cfa6 | 3629 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
3630 | /* Remember the redisplay method used to display the matrix. */ |
3631 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
3632 | #endif | |
408f5064 | 3633 | |
6b61353c KH |
3634 | #ifdef HAVE_WINDOW_SYSTEM |
3635 | update_window_fringes (w, 0); | |
3636 | #endif | |
3637 | ||
56974e03 GM |
3638 | /* End the update of window W. Don't set the cursor if we |
3639 | paused updating the display because in this case, | |
3640 | set_window_cursor_after_update hasn't been called, and | |
3641 | output_cursor doesn't contain the cursor location. */ | |
3642 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); | |
4588ec20 | 3643 | } |
5f5c8ee5 GM |
3644 | else |
3645 | paused_p = 1; | |
3646 | ||
e509cfa6 | 3647 | #ifdef GLYPH_DEBUG |
0cffd9d8 | 3648 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
3649 | add_window_display_history (w, w->current_matrix->method, paused_p); |
3650 | #endif | |
177c0ea7 | 3651 | |
5f5c8ee5 | 3652 | clear_glyph_matrix (desired_matrix); |
408f5064 | 3653 | |
5f5c8ee5 | 3654 | return paused_p; |
4588ec20 JB |
3655 | } |
3656 | ||
b64b3980 | 3657 | |
5f5c8ee5 GM |
3658 | /* Update the display of area AREA in window W, row number VPOS. |
3659 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
3660 | ||
3661 | static void | |
971de7fb | 3662 | update_marginal_area (struct window *w, int area, int vpos) |
b64b3980 | 3663 | { |
5f5c8ee5 | 3664 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 3665 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
3666 | |
3667 | /* Let functions in xterm.c know what area subsequent X positions | |
3668 | will be relative to. */ | |
3669 | updated_area = area; | |
3670 | ||
3671 | /* Set cursor to start of glyphs, write them, and clear to the end | |
3672 | of the area. I don't think that something more sophisticated is | |
3673 | necessary here, since marginal areas will not be the default. */ | |
3674 | rif->cursor_to (vpos, 0, desired_row->y, 0); | |
3675 | if (desired_row->used[area]) | |
3676 | rif->write_glyphs (desired_row->glyphs[area], desired_row->used[area]); | |
3677 | rif->clear_end_of_line (-1); | |
b64b3980 | 3678 | } |
23b0200c | 3679 | |
352f1545 | 3680 | |
408f5064 | 3681 | /* Update the display of the text area of row VPOS in window W. |
59ea14cd | 3682 | Value is true if display has changed. */ |
5f5c8ee5 | 3683 | |
59ea14cd | 3684 | static bool |
971de7fb | 3685 | update_text_area (struct window *w, int vpos) |
23b0200c | 3686 | { |
5f5c8ee5 GM |
3687 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
3688 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3689 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
59ea14cd | 3690 | bool changed_p = 0; |
5f5c8ee5 GM |
3691 | |
3692 | /* Let functions in xterm.c know what area subsequent X positions | |
3693 | will be relative to. */ | |
3694 | updated_area = TEXT_AREA; | |
177c0ea7 | 3695 | |
5f5c8ee5 GM |
3696 | /* If rows are at different X or Y, or rows have different height, |
3697 | or the current row is marked invalid, write the entire line. */ | |
3698 | if (!current_row->enabled_p | |
3699 | || desired_row->y != current_row->y | |
3700 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
3701 | || desired_row->phys_ascent != current_row->phys_ascent |
3702 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 3703 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 3704 | || current_row->overlapped_p |
fee8b690 CY |
3705 | /* This next line is necessary for correctly redrawing |
3706 | mouse-face areas after scrolling and other operations. | |
3707 | However, it causes excessive flickering when mouse is moved | |
3708 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
3709 | line doesn't seem to hurt anything. -- cyd. |
3710 | But it is still needed for the header line. -- kfs. */ | |
3711 | || (current_row->mouse_face_p | |
3712 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
3713 | || current_row->x != desired_row->x) |
3714 | { | |
3715 | rif->cursor_to (vpos, 0, desired_row->y, desired_row->x); | |
177c0ea7 | 3716 | |
5f5c8ee5 GM |
3717 | if (desired_row->used[TEXT_AREA]) |
3718 | rif->write_glyphs (desired_row->glyphs[TEXT_AREA], | |
3719 | desired_row->used[TEXT_AREA]); | |
177c0ea7 | 3720 | |
5f5c8ee5 GM |
3721 | /* Clear to end of window. */ |
3722 | rif->clear_end_of_line (-1); | |
408f5064 | 3723 | changed_p = 1; |
60f2f3f1 GM |
3724 | |
3725 | /* This erases the cursor. We do this here because | |
3726 | notice_overwritten_cursor cannot easily check this, which | |
3727 | might indicate that the whole functionality of | |
3728 | notice_overwritten_cursor would better be implemented here. | |
3729 | On the other hand, we need notice_overwritten_cursor as long | |
3730 | as mouse highlighting is done asynchronously outside of | |
3731 | redisplay. */ | |
3732 | if (vpos == w->phys_cursor.vpos) | |
3733 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
3734 | } |
3735 | else | |
3736 | { | |
3737 | int stop, i, x; | |
3738 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
3739 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
59ea14cd | 3740 | bool overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 3741 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
59ea14cd | 3742 | bool abort_skipping = 0; |
5f5c8ee5 | 3743 | |
78897758 YM |
3744 | /* If the desired row extends its face to the text area end, and |
3745 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
3746 | make sure we write at least one glyph, so that the face |
3747 | extension actually takes place. */ | |
78897758 YM |
3748 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
3749 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
3750 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
3751 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 3752 | --desired_stop_pos; |
177c0ea7 | 3753 | |
5f5c8ee5 GM |
3754 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
3755 | i = 0; | |
3756 | x = desired_row->x; | |
8399f8a0 GM |
3757 | |
3758 | /* Loop over glyphs that current and desired row may have | |
3759 | in common. */ | |
5f5c8ee5 | 3760 | while (i < stop) |
352f1545 | 3761 | { |
59ea14cd | 3762 | bool can_skip_p = !abort_skipping; |
177c0ea7 | 3763 | |
5f5c8ee5 | 3764 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
3765 | don't have to be written. We can't skip if the last |
3766 | current glyph overlaps the glyph to its right. For | |
3767 | example, consider a current row of `if ' with the `f' in | |
3768 | Courier bold so that it overlaps the ` ' to its right. | |
3769 | If the desired row is ` ', we would skip over the space | |
3770 | after the `if' and there would remain a pixel from the | |
3771 | `f' on the screen. */ | |
3772 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 3773 | { |
e47306e6 GM |
3774 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
3775 | int left, right; | |
177c0ea7 | 3776 | |
d3d50620 | 3777 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
e47306e6 | 3778 | &left, &right); |
91d227d9 | 3779 | can_skip_p = (right == 0 && !abort_skipping); |
352f1545 | 3780 | } |
177c0ea7 | 3781 | |
6d950f4c | 3782 | if (can_skip_p) |
352f1545 | 3783 | { |
91d227d9 CY |
3784 | int start_hpos = i; |
3785 | ||
6d950f4c GM |
3786 | while (i < stop |
3787 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
3788 | { | |
3789 | x += desired_glyph->pixel_width; | |
3790 | ++desired_glyph, ++current_glyph, ++i; | |
3791 | } | |
3792 | ||
3793 | /* Consider the case that the current row contains "xxx | |
3794 | ppp ggg" in italic Courier font, and the desired row | |
3795 | is "xxx ggg". The character `p' has lbearing, `g' | |
3796 | has not. The loop above will stop in front of the | |
3797 | first `p' in the current row. If we would start | |
3798 | writing glyphs there, we wouldn't erase the lbearing | |
3799 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 3800 | taken care of by draw_glyphs. */ |
6d950f4c GM |
3801 | if (overlapping_glyphs_p |
3802 | && i > 0 | |
3803 | && i < current_row->used[TEXT_AREA] | |
3804 | && (current_row->used[TEXT_AREA] | |
3805 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 3806 | { |
6d950f4c | 3807 | int left, right; |
177c0ea7 | 3808 | |
3a45383a | 3809 | rif->get_glyph_overhangs (current_glyph, |
d3d50620 | 3810 | XFRAME (w->frame), |
6d950f4c GM |
3811 | &left, &right); |
3812 | while (left > 0 && i > 0) | |
3813 | { | |
3814 | --i, --desired_glyph, --current_glyph; | |
3815 | x -= desired_glyph->pixel_width; | |
3816 | left -= desired_glyph->pixel_width; | |
3817 | } | |
91d227d9 CY |
3818 | |
3819 | /* Abort the skipping algorithm if we end up before | |
3820 | our starting point, to avoid looping (bug#1070). | |
3821 | This can happen when the lbearing is larger than | |
3822 | the pixel width. */ | |
3823 | abort_skipping = (i < start_hpos); | |
5f5c8ee5 | 3824 | } |
352f1545 | 3825 | } |
177c0ea7 | 3826 | |
5f5c8ee5 GM |
3827 | /* Try to avoid writing the entire rest of the desired row |
3828 | by looking for a resync point. This mainly prevents | |
3829 | mode line flickering in the case the mode line is in | |
3830 | fixed-pitch font, which it usually will be. */ | |
3831 | if (i < desired_row->used[TEXT_AREA]) | |
3832 | { | |
3833 | int start_x = x, start_hpos = i; | |
3834 | struct glyph *start = desired_glyph; | |
3835 | int current_x = x; | |
59ea14cd | 3836 | bool skip_first_p = !can_skip_p; |
6d950f4c | 3837 | |
5f5c8ee5 GM |
3838 | /* Find the next glyph that's equal again. */ |
3839 | while (i < stop | |
6d950f4c GM |
3840 | && (skip_first_p |
3841 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
3842 | && x == current_x) |
3843 | { | |
3844 | x += desired_glyph->pixel_width; | |
3845 | current_x += current_glyph->pixel_width; | |
3846 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 3847 | skip_first_p = 0; |
5f5c8ee5 | 3848 | } |
23b0200c | 3849 | |
5f5c8ee5 GM |
3850 | if (i == start_hpos || x != current_x) |
3851 | { | |
3852 | i = start_hpos; | |
3853 | x = start_x; | |
3854 | desired_glyph = start; | |
3855 | break; | |
3856 | } | |
e47306e6 | 3857 | |
5f5c8ee5 GM |
3858 | rif->cursor_to (vpos, start_hpos, desired_row->y, start_x); |
3859 | rif->write_glyphs (start, i - start_hpos); | |
408f5064 | 3860 | changed_p = 1; |
5f5c8ee5 GM |
3861 | } |
3862 | } | |
177c0ea7 | 3863 | |
5f5c8ee5 GM |
3864 | /* Write the rest. */ |
3865 | if (i < desired_row->used[TEXT_AREA]) | |
3866 | { | |
3867 | rif->cursor_to (vpos, i, desired_row->y, x); | |
3868 | rif->write_glyphs (desired_glyph, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 3869 | changed_p = 1; |
5f5c8ee5 | 3870 | } |
177c0ea7 | 3871 | |
5f5c8ee5 GM |
3872 | /* Maybe clear to end of line. */ |
3873 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
3874 | { | |
3875 | /* If new row extends to the end of the text area, nothing | |
3876 | has to be cleared, if and only if we did a write_glyphs | |
3877 | above. This is made sure by setting desired_stop_pos | |
3878 | appropriately above. */ | |
a54e2c05 | 3879 | eassert (i < desired_row->used[TEXT_AREA] |
78897758 YM |
3880 | || ((desired_row->used[TEXT_AREA] |
3881 | == current_row->used[TEXT_AREA]) | |
3882 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
3883 | } |
3884 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
3885 | { | |
3886 | /* If old row extends to the end of the text area, clear. */ | |
3887 | if (i >= desired_row->used[TEXT_AREA]) | |
3888 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3889 | desired_row->pixel_width); |
5f5c8ee5 | 3890 | rif->clear_end_of_line (-1); |
408f5064 | 3891 | changed_p = 1; |
5f5c8ee5 GM |
3892 | } |
3893 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 3894 | { |
5f5c8ee5 GM |
3895 | /* Otherwise clear to the end of the old row. Everything |
3896 | after that position should be clear already. */ | |
27786b2f | 3897 | int xlim; |
177c0ea7 | 3898 | |
5f5c8ee5 GM |
3899 | if (i >= desired_row->used[TEXT_AREA]) |
3900 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3901 | desired_row->pixel_width); |
5f5c8ee5 GM |
3902 | |
3903 | /* If cursor is displayed at the end of the line, make sure | |
3904 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
3905 | with which to erase the cursor (because this method | |
3906 | doesn't work with lbearing/rbearing), so we must do it | |
3907 | this way. */ | |
3908 | if (vpos == w->phys_cursor.vpos | |
f951a506 EZ |
3909 | && (desired_row->reversed_p |
3910 | ? (w->phys_cursor.hpos < 0) | |
3911 | : (w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]))) | |
5f5c8ee5 GM |
3912 | { |
3913 | w->phys_cursor_on_p = 0; | |
27786b2f | 3914 | xlim = -1; |
5f5c8ee5 GM |
3915 | } |
3916 | else | |
27786b2f PE |
3917 | xlim = current_row->pixel_width; |
3918 | rif->clear_end_of_line (xlim); | |
408f5064 | 3919 | changed_p = 1; |
2e8907d3 | 3920 | } |
23b0200c | 3921 | } |
408f5064 GM |
3922 | |
3923 | return changed_p; | |
23b0200c | 3924 | } |
4588ec20 | 3925 | |
5f5c8ee5 | 3926 | |
59ea14cd | 3927 | /* Update row VPOS in window W. Value is true if display has been changed. */ |
5f5c8ee5 | 3928 | |
59ea14cd PE |
3929 | static bool |
3930 | update_window_line (struct window *w, int vpos, bool *mouse_face_overwritten_p) | |
5f5c8ee5 GM |
3931 | { |
3932 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
3933 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3934 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
59ea14cd | 3935 | bool changed_p = 0; |
5f5c8ee5 | 3936 | |
5f5c8ee5 GM |
3937 | /* Set the row being updated. This is important to let xterm.c |
3938 | know what line height values are in effect. */ | |
3939 | updated_row = desired_row; | |
3940 | ||
177c0ea7 JB |
3941 | /* A row can be completely invisible in case a desired matrix was |
3942 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
3943 | the matrix. Make sure to make such rows current anyway, since |
3944 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
3945 | if (desired_row->mode_line_p |
3946 | || desired_row->visible_height > 0) | |
408f5064 | 3947 | { |
a54e2c05 | 3948 | eassert (desired_row->enabled_p); |
504805ac GM |
3949 | |
3950 | /* Update display of the left margin area, if there is one. */ | |
3951 | if (!desired_row->full_width_p | |
d3d50620 | 3952 | && !NILP (w->left_margin_cols)) |
504805ac GM |
3953 | { |
3954 | changed_p = 1; | |
3955 | update_marginal_area (w, LEFT_MARGIN_AREA, vpos); | |
e9957956 EZ |
3956 | /* Setting this flag will ensure the vertical border, if |
3957 | any, between this window and the one on its left will be | |
3958 | redrawn. This is necessary because updating the left | |
3959 | margin area can potentially draw over the border. */ | |
3960 | current_row->redraw_fringe_bitmaps_p = 1; | |
504805ac | 3961 | } |
177c0ea7 | 3962 | |
504805ac GM |
3963 | /* Update the display of the text area. */ |
3964 | if (update_text_area (w, vpos)) | |
3965 | { | |
3966 | changed_p = 1; | |
3967 | if (current_row->mouse_face_p) | |
3968 | *mouse_face_overwritten_p = 1; | |
3969 | } | |
177c0ea7 | 3970 | |
504805ac GM |
3971 | /* Update display of the right margin area, if there is one. */ |
3972 | if (!desired_row->full_width_p | |
d3d50620 | 3973 | && !NILP (w->right_margin_cols)) |
504805ac GM |
3974 | { |
3975 | changed_p = 1; | |
3976 | update_marginal_area (w, RIGHT_MARGIN_AREA, vpos); | |
3977 | } | |
177c0ea7 | 3978 | |
504805ac GM |
3979 | /* Draw truncation marks etc. */ |
3980 | if (!current_row->enabled_p | |
3981 | || desired_row->y != current_row->y | |
3982 | || desired_row->visible_height != current_row->visible_height | |
6b61353c | 3983 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 3984 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
6b61353c | 3985 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 3986 | || desired_row->mode_line_p != current_row->mode_line_p |
6b61353c | 3987 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
3988 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
3989 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
3990 | rif->after_update_window_line_hook (desired_row); | |
408f5064 | 3991 | } |
177c0ea7 | 3992 | |
5f5c8ee5 GM |
3993 | /* Update current_row from desired_row. */ |
3994 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
3995 | updated_row = NULL; | |
408f5064 | 3996 | return changed_p; |
5f5c8ee5 GM |
3997 | } |
3998 | ||
3999 | ||
4000 | /* Set the cursor after an update of window W. This function may only | |
4001 | be called from update_window. */ | |
4002 | ||
4003 | static void | |
971de7fb | 4004 | set_window_cursor_after_update (struct window *w) |
4588ec20 | 4005 | { |
d3d50620 | 4006 | struct frame *f = XFRAME (w->frame); |
fa971ac3 | 4007 | struct redisplay_interface *rif = FRAME_RIF (f); |
5f5c8ee5 GM |
4008 | int cx, cy, vpos, hpos; |
4009 | ||
4010 | /* Not intended for frame matrix updates. */ | |
a54e2c05 | 4011 | eassert (FRAME_WINDOW_P (f)); |
177c0ea7 | 4012 | |
b96fd3e8 GM |
4013 | if (cursor_in_echo_area |
4014 | && !NILP (echo_area_buffer[0]) | |
4015 | /* If we are showing a message instead of the mini-buffer, | |
4016 | show the cursor for the message instead. */ | |
4017 | && XWINDOW (minibuf_window) == w | |
4018 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
4019 | /* These cases apply only to the frame that contains |
4020 | the active mini-buffer window. */ | |
4021 | && FRAME_HAS_MINIBUF_P (f) | |
4022 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
4023 | { | |
4024 | cx = cy = vpos = hpos = 0; | |
4025 | ||
4026 | if (cursor_in_echo_area >= 0) | |
4027 | { | |
4028 | /* If the mini-buffer is several lines high, find the last | |
4029 | line that has any text on it. Note: either all lines | |
4030 | are enabled or none. Otherwise we wouldn't be able to | |
4031 | determine Y. */ | |
862b4790 GM |
4032 | struct glyph_row *row, *last_row; |
4033 | struct glyph *glyph; | |
4034 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 4035 | |
862b4790 | 4036 | last_row = NULL; |
6206f8ce GM |
4037 | row = w->current_matrix->rows; |
4038 | while (row->enabled_p | |
4039 | && (last_row == NULL | |
4040 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 4041 | { |
862b4790 GM |
4042 | if (row->used[TEXT_AREA] |
4043 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
4044 | last_row = row; | |
6206f8ce | 4045 | ++row; |
862b4790 | 4046 | } |
177c0ea7 | 4047 | |
5f5c8ee5 GM |
4048 | if (last_row) |
4049 | { | |
6206f8ce GM |
4050 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
4051 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 4052 | |
b96fd3e8 | 4053 | while (last > start && last->charpos < 0) |
862b4790 | 4054 | --last; |
177c0ea7 | 4055 | |
862b4790 GM |
4056 | for (glyph = start; glyph < last; ++glyph) |
4057 | { | |
4058 | cx += glyph->pixel_width; | |
4059 | ++hpos; | |
4060 | } | |
4061 | ||
5f5c8ee5 | 4062 | cy = last_row->y; |
862b4790 | 4063 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
4064 | } |
4065 | } | |
4066 | } | |
4067 | else | |
4068 | { | |
4069 | cx = w->cursor.x; | |
4070 | cy = w->cursor.y; | |
4071 | hpos = w->cursor.hpos; | |
4072 | vpos = w->cursor.vpos; | |
4073 | } | |
4588ec20 | 4074 | |
5f5c8ee5 | 4075 | /* Window cursor can be out of sync for horizontally split windows. */ |
f951a506 | 4076 | hpos = max (-1, hpos); /* -1 is for when cursor is on the left fringe */ |
5f5c8ee5 GM |
4077 | hpos = min (w->current_matrix->matrix_w - 1, hpos); |
4078 | vpos = max (0, vpos); | |
4079 | vpos = min (w->current_matrix->nrows - 1, vpos); | |
4080 | rif->cursor_to (vpos, hpos, cy, cx); | |
4588ec20 | 4081 | } |
4588ec20 | 4082 | |
5f5c8ee5 | 4083 | |
6df5d75f GM |
4084 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window |
4085 | tree rooted at W. */ | |
4086 | ||
4087 | void | |
59ea14cd | 4088 | set_window_update_flags (struct window *w, bool on_p) |
6df5d75f GM |
4089 | { |
4090 | while (w) | |
4091 | { | |
d3d50620 DA |
4092 | if (!NILP (w->hchild)) |
4093 | set_window_update_flags (XWINDOW (w->hchild), on_p); | |
4094 | else if (!NILP (w->vchild)) | |
4095 | set_window_update_flags (XWINDOW (w->vchild), on_p); | |
6df5d75f GM |
4096 | else |
4097 | w->must_be_updated_p = on_p; | |
4098 | ||
d3d50620 | 4099 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
6df5d75f | 4100 | } |
177c0ea7 | 4101 | } |
6df5d75f GM |
4102 | |
4103 | ||
4104 | \f | |
4105 | /*********************************************************************** | |
4106 | Window-Based Scrolling | |
4107 | ***********************************************************************/ | |
4108 | ||
4109 | /* Structure describing rows in scrolling_window. */ | |
4110 | ||
4111 | struct row_entry | |
4112 | { | |
4113 | /* Number of occurrences of this row in desired and current matrix. */ | |
4114 | int old_uses, new_uses; | |
177c0ea7 | 4115 | |
6df5d75f GM |
4116 | /* Vpos of row in new matrix. */ |
4117 | int new_line_number; | |
4118 | ||
4119 | /* Bucket index of this row_entry in the hash table row_table. */ | |
ca9ce8f2 | 4120 | ptrdiff_t bucket; |
177c0ea7 | 4121 | |
6df5d75f GM |
4122 | /* The row described by this entry. */ |
4123 | struct glyph_row *row; | |
177c0ea7 | 4124 | |
6df5d75f GM |
4125 | /* Hash collision chain. */ |
4126 | struct row_entry *next; | |
4127 | }; | |
4128 | ||
4129 | /* A pool to allocate row_entry structures from, and the size of the | |
4130 | pool. The pool is reallocated in scrolling_window when we find | |
4131 | that we need a larger one. */ | |
4132 | ||
4133 | static struct row_entry *row_entry_pool; | |
ca9ce8f2 | 4134 | static ptrdiff_t row_entry_pool_size; |
6df5d75f GM |
4135 | |
4136 | /* Index of next free entry in row_entry_pool. */ | |
4137 | ||
ca9ce8f2 | 4138 | static ptrdiff_t row_entry_idx; |
6df5d75f GM |
4139 | |
4140 | /* The hash table used during scrolling, and the table's size. This | |
4141 | table is used to quickly identify equal rows in the desired and | |
4142 | current matrix. */ | |
4143 | ||
4144 | static struct row_entry **row_table; | |
ca9ce8f2 | 4145 | static ptrdiff_t row_table_size; |
6df5d75f GM |
4146 | |
4147 | /* Vectors of pointers to row_entry structures belonging to the | |
4148 | current and desired matrix, and the size of the vectors. */ | |
4149 | ||
4150 | static struct row_entry **old_lines, **new_lines; | |
0065d054 | 4151 | static ptrdiff_t old_lines_size, new_lines_size; |
6df5d75f GM |
4152 | |
4153 | /* A pool to allocate run structures from, and its size. */ | |
4154 | ||
4155 | static struct run *run_pool; | |
0065d054 | 4156 | static ptrdiff_t runs_size; |
6df5d75f GM |
4157 | |
4158 | /* A vector of runs of lines found during scrolling. */ | |
4159 | ||
4160 | static struct run **runs; | |
4161 | ||
6b1f9ba4 | 4162 | /* Add glyph row ROW to the scrolling hash table. */ |
6df5d75f | 4163 | |
b0ab8123 | 4164 | static struct row_entry * |
6b1f9ba4 | 4165 | add_row_entry (struct glyph_row *row) |
6df5d75f GM |
4166 | { |
4167 | struct row_entry *entry; | |
ca9ce8f2 | 4168 | ptrdiff_t i = row->hash % row_table_size; |
177c0ea7 | 4169 | |
6df5d75f | 4170 | entry = row_table[i]; |
a54e2c05 | 4171 | eassert (entry || verify_row_hash (row)); |
6b1f9ba4 | 4172 | while (entry && !row_equal_p (entry->row, row, 1)) |
6df5d75f | 4173 | entry = entry->next; |
177c0ea7 | 4174 | |
6df5d75f GM |
4175 | if (entry == NULL) |
4176 | { | |
4177 | entry = row_entry_pool + row_entry_idx++; | |
4178 | entry->row = row; | |
4179 | entry->old_uses = entry->new_uses = 0; | |
4180 | entry->new_line_number = 0; | |
4181 | entry->bucket = i; | |
4182 | entry->next = row_table[i]; | |
4183 | row_table[i] = entry; | |
4184 | } | |
4185 | ||
4186 | return entry; | |
4187 | } | |
4188 | ||
4189 | ||
5f5c8ee5 | 4190 | /* Try to reuse part of the current display of W by scrolling lines. |
59ea14cd | 4191 | HEADER_LINE_P means W has a header line. |
5f5c8ee5 GM |
4192 | |
4193 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4194 | Technique for Isolating Differences Between Files." It should take | |
4195 | O(N) time. | |
4196 | ||
4197 | A short outline of the steps of the algorithm | |
4198 | ||
4199 | 1. Skip lines equal at the start and end of both matrices. | |
4200 | ||
4201 | 2. Enter rows in the current and desired matrix into a symbol | |
4202 | table, counting how often they appear in both matrices. | |
4203 | ||
4204 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4205 | i.e. we assume that such lines are likely to have been moved. | |
4206 | ||
4207 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4208 | forward and backward. | |
4209 | ||
4210 | Value is | |
4211 | ||
4212 | -1 if all rows were found to be equal. | |
4213 | 0 to indicate that we did not scroll the display, or | |
4214 | 1 if we did scroll. */ | |
4215 | ||
4216 | static int | |
59ea14cd | 4217 | scrolling_window (struct window *w, bool header_line_p) |
4588ec20 | 4218 | { |
5f5c8ee5 GM |
4219 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4220 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4221 | int yb = window_text_bottom_y (w); | |
ca9ce8f2 PE |
4222 | ptrdiff_t i; |
4223 | int j, first_old, first_new, last_old, last_new; | |
4224 | int nruns, run_idx; | |
0065d054 | 4225 | ptrdiff_t n; |
6df5d75f | 4226 | struct row_entry *entry; |
fa971ac3 | 4227 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4228 | |
4229 | /* Skip over rows equal at the start. */ | |
59ea14cd | 4230 | for (i = header_line_p; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4231 | { |
bfdcafe1 GM |
4232 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4233 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4234 | ||
4235 | if (c->enabled_p | |
4236 | && d->enabled_p | |
6b61353c | 4237 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4238 | && c->y == d->y |
4239 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4240 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
6b1f9ba4 | 4241 | && row_equal_p (c, d, 1)) |
bfdcafe1 GM |
4242 | { |
4243 | assign_row (c, d); | |
4244 | d->enabled_p = 0; | |
4245 | } | |
4246 | else | |
4247 | break; | |
5f5c8ee5 | 4248 | } |
4588ec20 | 4249 | |
5f5c8ee5 GM |
4250 | /* Give up if some rows in the desired matrix are not enabled. */ |
4251 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4252 | return -1; | |
177c0ea7 | 4253 | |
5f5c8ee5 GM |
4254 | first_old = first_new = i; |
4255 | ||
4d8ade89 YM |
4256 | /* Set last_new to the index + 1 of the row that reaches the |
4257 | bottom boundary in the desired matrix. Give up if we find a | |
4258 | disabled row before we reach the bottom boundary. */ | |
5f5c8ee5 | 4259 | i = first_new + 1; |
4d8ade89 YM |
4260 | while (i < desired_matrix->nrows - 1) |
4261 | { | |
4262 | int bottom; | |
5f5c8ee5 | 4263 | |
4d8ade89 YM |
4264 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) |
4265 | return 0; | |
4266 | bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)); | |
4267 | if (bottom <= yb) | |
4268 | ++i; | |
4269 | if (bottom >= yb) | |
4270 | break; | |
4271 | } | |
5f5c8ee5 GM |
4272 | |
4273 | last_new = i; | |
4274 | ||
4d8ade89 YM |
4275 | /* Set last_old to the index + 1 of the row that reaches the bottom |
4276 | boundary in the current matrix. We don't look at the enabled | |
4277 | flag here because we plan to reuse part of the display even if | |
4278 | other parts are disabled. */ | |
5f5c8ee5 | 4279 | i = first_old + 1; |
93962bfa GM |
4280 | while (i < current_matrix->nrows - 1) |
4281 | { | |
4282 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4283 | if (bottom <= yb) | |
4284 | ++i; | |
4285 | if (bottom >= yb) | |
4286 | break; | |
4287 | } | |
4288 | ||
5f5c8ee5 GM |
4289 | last_old = i; |
4290 | ||
4291 | /* Skip over rows equal at the bottom. */ | |
4292 | i = last_new; | |
4293 | j = last_old; | |
4294 | while (i - 1 > first_new | |
4295 | && j - 1 > first_old | |
1e5b2111 EZ |
4296 | && MATRIX_ROW (current_matrix, j - 1)->enabled_p |
4297 | && (MATRIX_ROW (current_matrix, j - 1)->y | |
4298 | == MATRIX_ROW (desired_matrix, i - 1)->y) | |
4299 | && !MATRIX_ROW (desired_matrix, i - 1)->redraw_fringe_bitmaps_p | |
6b1f9ba4 | 4300 | && row_equal_p (MATRIX_ROW (desired_matrix, i - 1), |
e4e0bee9 | 4301 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
4302 | --i, --j; |
4303 | last_new = i; | |
4304 | last_old = j; | |
4305 | ||
4306 | /* Nothing to do if all rows are equal. */ | |
4307 | if (last_new == first_new) | |
4308 | return 0; | |
4309 | ||
0065d054 | 4310 | /* Check for integer overflow in size calculation. |
ca9ce8f2 PE |
4311 | |
4312 | If next_almost_prime checks (N) for divisibility by 2..10, then | |
4313 | it can return at most N + 10, e.g., next_almost_prime (1) == 11. | |
4314 | So, set next_almost_prime_increment_max to 10. | |
4315 | ||
4316 | It's just a coincidence that next_almost_prime_increment_max == | |
4317 | NEXT_ALMOST_PRIME_LIMIT - 1. If NEXT_ALMOST_PRIME_LIMIT were | |
4318 | 13, then next_almost_prime_increment_max would be 14, e.g., | |
4319 | because next_almost_prime (113) would be 127. */ | |
4320 | { | |
4321 | verify (NEXT_ALMOST_PRIME_LIMIT == 11); | |
4322 | enum { next_almost_prime_increment_max = 10 }; | |
ca9ce8f2 | 4323 | ptrdiff_t row_table_max = |
0065d054 PE |
4324 | (min (PTRDIFF_MAX, SIZE_MAX) / (3 * sizeof *row_table) |
4325 | - next_almost_prime_increment_max); | |
4326 | ptrdiff_t current_nrows_max = row_table_max - desired_matrix->nrows; | |
4327 | if (current_nrows_max < current_matrix->nrows) | |
ca9ce8f2 PE |
4328 | memory_full (SIZE_MAX); |
4329 | } | |
4330 | ||
6df5d75f | 4331 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 4332 | |
6df5d75f | 4333 | if (current_matrix->nrows > old_lines_size) |
0065d054 PE |
4334 | old_lines = xpalloc (old_lines, &old_lines_size, |
4335 | current_matrix->nrows - old_lines_size, | |
4336 | INT_MAX, sizeof *old_lines); | |
177c0ea7 | 4337 | |
6df5d75f | 4338 | if (desired_matrix->nrows > new_lines_size) |
0065d054 PE |
4339 | new_lines = xpalloc (new_lines, &new_lines_size, |
4340 | desired_matrix->nrows - new_lines_size, | |
4341 | INT_MAX, sizeof *new_lines); | |
6df5d75f | 4342 | |
ca9ce8f2 PE |
4343 | n = desired_matrix->nrows; |
4344 | n += current_matrix->nrows; | |
0065d054 | 4345 | if (row_table_size < 3 * n) |
6df5d75f | 4346 | { |
ca9ce8f2 | 4347 | ptrdiff_t size = next_almost_prime (3 * n); |
0065d054 | 4348 | row_table = xnrealloc (row_table, size, sizeof *row_table); |
ca9ce8f2 | 4349 | row_table_size = size; |
0065d054 | 4350 | memset (row_table, 0, size * sizeof *row_table); |
6df5d75f GM |
4351 | } |
4352 | ||
4353 | if (n > row_entry_pool_size) | |
0065d054 PE |
4354 | row_entry_pool = xpalloc (row_entry_pool, &row_entry_pool_size, |
4355 | n - row_entry_pool_size, | |
4356 | -1, sizeof *row_entry_pool); | |
6df5d75f GM |
4357 | |
4358 | if (desired_matrix->nrows > runs_size) | |
4359 | { | |
0065d054 PE |
4360 | runs = xnrealloc (runs, desired_matrix->nrows, sizeof *runs); |
4361 | run_pool = xnrealloc (run_pool, desired_matrix->nrows, sizeof *run_pool); | |
ca9ce8f2 | 4362 | runs_size = desired_matrix->nrows; |
6df5d75f GM |
4363 | } |
4364 | ||
4365 | nruns = run_idx = 0; | |
4366 | row_entry_idx = 0; | |
4367 | ||
4368 | /* Add rows from the current and desired matrix to the hash table | |
4369 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 4370 | |
5f5c8ee5 GM |
4371 | for (i = first_old; i < last_old; ++i) |
4372 | { | |
4373 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
4374 | { | |
6b1f9ba4 | 4375 | entry = add_row_entry (MATRIX_ROW (current_matrix, i)); |
6df5d75f GM |
4376 | old_lines[i] = entry; |
4377 | ++entry->old_uses; | |
5f5c8ee5 GM |
4378 | } |
4379 | else | |
6df5d75f | 4380 | old_lines[i] = NULL; |
5f5c8ee5 GM |
4381 | } |
4382 | ||
5f5c8ee5 GM |
4383 | for (i = first_new; i < last_new; ++i) |
4384 | { | |
a54e2c05 | 4385 | eassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); |
6b1f9ba4 | 4386 | entry = add_row_entry (MATRIX_ROW (desired_matrix, i)); |
6df5d75f GM |
4387 | ++entry->new_uses; |
4388 | entry->new_line_number = i; | |
4389 | new_lines[i] = entry; | |
5f5c8ee5 | 4390 | } |
4588ec20 | 4391 | |
5f5c8ee5 GM |
4392 | /* Identify moves based on lines that are unique and equal |
4393 | in both matrices. */ | |
4394 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
4395 | if (old_lines[i] |
4396 | && old_lines[i]->old_uses == 1 | |
4397 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 | 4398 | { |
27786b2f | 4399 | int p, q; |
6df5d75f GM |
4400 | int new_line = old_lines[i]->new_line_number; |
4401 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
4402 | |
4403 | /* Record move. */ | |
4404 | run->current_vpos = i; | |
4405 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
4406 | run->desired_vpos = new_line; | |
4407 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
4408 | run->nrows = 1; | |
4409 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
4410 | ||
4411 | /* Extend backward. */ | |
27786b2f PE |
4412 | p = i - 1; |
4413 | q = new_line - 1; | |
4414 | while (p > first_old | |
4415 | && q > first_new | |
4416 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4417 | { |
27786b2f | 4418 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 JB |
4419 | --run->current_vpos; |
4420 | --run->desired_vpos; | |
5f5c8ee5 GM |
4421 | ++run->nrows; |
4422 | run->height += h; | |
4423 | run->desired_y -= h; | |
4424 | run->current_y -= h; | |
27786b2f | 4425 | --p, --q; |
5f5c8ee5 | 4426 | } |
4588ec20 | 4427 | |
5f5c8ee5 | 4428 | /* Extend forward. */ |
27786b2f PE |
4429 | p = i + 1; |
4430 | q = new_line + 1; | |
4431 | while (p < last_old | |
4432 | && q < last_new | |
4433 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4434 | { |
27786b2f | 4435 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 | 4436 | ++run->nrows; |
5f5c8ee5 | 4437 | run->height += h; |
27786b2f | 4438 | ++p, ++q; |
5f5c8ee5 | 4439 | } |
19dff8dc | 4440 | |
5f5c8ee5 GM |
4441 | /* Insert run into list of all runs. Order runs by copied |
4442 | pixel lines. Note that we record runs that don't have to | |
4443 | be copied because they are already in place. This is done | |
4444 | because we can avoid calling update_window_line in this | |
4445 | case. */ | |
27786b2f | 4446 | for (p = 0; p < nruns && runs[p]->height > run->height; ++p) |
5f5c8ee5 | 4447 | ; |
27786b2f PE |
4448 | for (q = nruns; q > p; --q) |
4449 | runs[q] = runs[q - 1]; | |
4450 | runs[p] = run; | |
5f5c8ee5 GM |
4451 | ++nruns; |
4452 | ||
4453 | i += run->nrows; | |
4454 | } | |
4455 | else | |
4456 | ++i; | |
4588ec20 | 4457 | |
5f5c8ee5 GM |
4458 | /* Do the moves. Do it in a way that we don't overwrite something |
4459 | we want to copy later on. This is not solvable in general | |
4460 | because there is only one display and we don't have a way to | |
4461 | exchange areas on this display. Example: | |
4588ec20 | 4462 | |
5f5c8ee5 GM |
4463 | +-----------+ +-----------+ |
4464 | | A | | B | | |
4465 | +-----------+ --> +-----------+ | |
4466 | | B | | A | | |
4467 | +-----------+ +-----------+ | |
4588ec20 | 4468 | |
5f5c8ee5 GM |
4469 | Instead, prefer bigger moves, and invalidate moves that would |
4470 | copy from where we copied to. */ | |
ea0d86af | 4471 | |
5f5c8ee5 GM |
4472 | for (i = 0; i < nruns; ++i) |
4473 | if (runs[i]->nrows > 0) | |
4474 | { | |
4475 | struct run *r = runs[i]; | |
24e86043 | 4476 | |
5f5c8ee5 GM |
4477 | /* Copy on the display. */ |
4478 | if (r->current_y != r->desired_y) | |
4479 | { | |
989b42d2 | 4480 | rif->clear_window_mouse_face (w); |
5f5c8ee5 | 4481 | rif->scroll_run_hook (w, r); |
1305621b | 4482 | } |
5f5c8ee5 | 4483 | |
1305621b YM |
4484 | /* Truncate runs that copy to where we copied to, and |
4485 | invalidate runs that copy from where we copied to. */ | |
4486 | for (j = nruns - 1; j > i; --j) | |
4487 | { | |
4488 | struct run *p = runs[j]; | |
59ea14cd | 4489 | bool truncated_p = 0; |
5f5c8ee5 | 4490 | |
1305621b YM |
4491 | if (p->nrows > 0 |
4492 | && p->desired_y < r->desired_y + r->height | |
4493 | && p->desired_y + p->height > r->desired_y) | |
5f5c8ee5 | 4494 | { |
1305621b YM |
4495 | if (p->desired_y < r->desired_y) |
4496 | { | |
4497 | p->nrows = r->desired_vpos - p->desired_vpos; | |
4498 | p->height = r->desired_y - p->desired_y; | |
4499 | truncated_p = 1; | |
4500 | } | |
4501 | else | |
4502 | { | |
4503 | int nrows_copied = (r->desired_vpos + r->nrows | |
4504 | - p->desired_vpos); | |
4505 | ||
4506 | if (p->nrows <= nrows_copied) | |
4507 | p->nrows = 0; | |
4508 | else | |
4509 | { | |
4510 | int height_copied = (r->desired_y + r->height | |
4511 | - p->desired_y); | |
4512 | ||
4513 | p->current_vpos += nrows_copied; | |
4514 | p->desired_vpos += nrows_copied; | |
4515 | p->nrows -= nrows_copied; | |
4516 | p->current_y += height_copied; | |
4517 | p->desired_y += height_copied; | |
4518 | p->height -= height_copied; | |
4519 | truncated_p = 1; | |
4520 | } | |
4521 | } | |
4522 | } | |
177c0ea7 | 4523 | |
1305621b YM |
4524 | if (r->current_y != r->desired_y |
4525 | /* The condition below is equivalent to | |
4526 | ((p->current_y >= r->desired_y | |
5f5c8ee5 | 4527 | && p->current_y < r->desired_y + r->height) |
1305621b | 4528 | || (p->current_y + p->height > r->desired_y |
5f5c8ee5 | 4529 | && (p->current_y + p->height |
1305621b YM |
4530 | <= r->desired_y + r->height))) |
4531 | because we have 0 < p->height <= r->height. */ | |
4532 | && p->current_y < r->desired_y + r->height | |
4533 | && p->current_y + p->height > r->desired_y) | |
4534 | p->nrows = 0; | |
4535 | ||
4536 | /* Reorder runs by copied pixel lines if truncated. */ | |
4537 | if (truncated_p && p->nrows > 0) | |
4538 | { | |
4539 | int k = nruns - 1; | |
4540 | ||
4541 | while (runs[k]->nrows == 0 || runs[k]->height < p->height) | |
4542 | k--; | |
4543 | memmove (runs + j, runs + j + 1, (k - j) * sizeof (*runs)); | |
4544 | runs[k] = p; | |
5f5c8ee5 GM |
4545 | } |
4546 | } | |
ea0d86af | 4547 | |
5f5c8ee5 GM |
4548 | /* Assign matrix rows. */ |
4549 | for (j = 0; j < r->nrows; ++j) | |
4550 | { | |
4551 | struct glyph_row *from, *to; | |
59ea14cd | 4552 | bool to_overlapped_p; |
e876ff42 | 4553 | |
5f5c8ee5 GM |
4554 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
4555 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 4556 | to_overlapped_p = to->overlapped_p; |
e61124cd | 4557 | from->redraw_fringe_bitmaps_p = from->fringe_bitmap_periodic_p; |
5f5c8ee5 | 4558 | assign_row (to, from); |
1305621b YM |
4559 | /* The above `assign_row' actually does swap, so if we had |
4560 | an overlap in the copy destination of two runs, then | |
4561 | the second run would assign a previously disabled bogus | |
4562 | row. But thanks to the truncation code in the | |
4563 | preceding for-loop, we no longer have such an overlap, | |
4564 | and thus the assigned row should always be enabled. */ | |
a54e2c05 | 4565 | eassert (to->enabled_p); |
1305621b | 4566 | from->enabled_p = 0; |
408f5064 | 4567 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
4568 | } |
4569 | } | |
15874c59 | 4570 | |
6df5d75f GM |
4571 | /* Clear the hash table, for the next time. */ |
4572 | for (i = 0; i < row_entry_idx; ++i) | |
4573 | row_table[row_entry_pool[i].bucket] = NULL; | |
4574 | ||
aec1708a PE |
4575 | /* Value is 1 to indicate that we scrolled the display. */ |
4576 | return 0 < nruns; | |
5f5c8ee5 | 4577 | } |
de83c314 | 4578 | |
15874c59 | 4579 | |
4588ec20 | 4580 | \f |
5f5c8ee5 GM |
4581 | /************************************************************************ |
4582 | Frame-Based Updates | |
4583 | ************************************************************************/ | |
4588ec20 | 4584 | |
5f5c8ee5 | 4585 | /* Update the desired frame matrix of frame F. |
4588ec20 | 4586 | |
59ea14cd PE |
4587 | FORCE_P means that the update should not be stopped by pending input. |
4588 | INHIBIT_HAIRY_ID_P means that scrolling should not be tried. | |
5f5c8ee5 | 4589 | |
59ea14cd | 4590 | Value is true if update was stopped due to pending input. */ |
5f5c8ee5 | 4591 | |
59ea14cd PE |
4592 | static bool |
4593 | update_frame_1 (struct frame *f, bool force_p, bool inhibit_id_p) | |
4588ec20 | 4594 | { |
5f5c8ee5 GM |
4595 | /* Frame matrices to work on. */ |
4596 | struct glyph_matrix *current_matrix = f->current_matrix; | |
4597 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
4598 | int i; | |
59ea14cd | 4599 | bool pause_p; |
4588ec20 | 4600 | int preempt_count = baud_rate / 2400 + 1; |
5f5c8ee5 | 4601 | |
a54e2c05 | 4602 | eassert (current_matrix && desired_matrix); |
4588ec20 | 4603 | |
c37e4889 RS |
4604 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
4605 | calculate_costs (f); | |
4606 | ||
d88c2b9e RS |
4607 | if (preempt_count <= 0) |
4608 | preempt_count = 1; | |
4609 | ||
a2130dbb KS |
4610 | #if !PERIODIC_PREEMPTION_CHECKING |
4611 | if (!force_p && detect_input_pending_ignore_squeezables ()) | |
4588ec20 | 4612 | { |
27786b2f | 4613 | pause_p = 1; |
4588ec20 JB |
4614 | goto do_pause; |
4615 | } | |
d012c62b | 4616 | #endif |
4588ec20 | 4617 | |
5f5c8ee5 | 4618 | /* If we cannot insert/delete lines, it's no use trying it. */ |
daf01701 | 4619 | if (!FRAME_LINE_INS_DEL_OK (f)) |
5f5c8ee5 | 4620 | inhibit_id_p = 1; |
7098a0fa | 4621 | |
efb859b4 | 4622 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
4623 | i/d line if just want cursor motion. */ |
4624 | for (i = 0; i < desired_matrix->nrows; i++) | |
4625 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
4626 | break; |
4627 | ||
4628 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
4629 | if (!inhibit_id_p && i < desired_matrix->nrows) |
4630 | force_p |= scrolling (f); | |
4588ec20 JB |
4631 | |
4632 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
4633 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
4634 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 4635 | |
5f5c8ee5 GM |
4636 | /* Now update the rest of the lines. */ |
4637 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 4638 | { |
5f5c8ee5 | 4639 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 4640 | { |
b6a65ac2 | 4641 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
4642 | { |
4643 | /* Flush out every so many lines. | |
4644 | Also flush out if likely to have more than 1k buffered | |
4645 | otherwise. I'm told that some telnet connections get | |
4646 | really screwed by more than 1k output at once. */ | |
fced92f1 CY |
4647 | FILE *display_output = FRAME_TTY (f)->output; |
4648 | if (display_output) | |
4588ec20 | 4649 | { |
fced92f1 CY |
4650 | int outq = PENDING_OUTPUT_COUNT (display_output); |
4651 | if (outq > 900 | |
4652 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
4588ec20 | 4653 | { |
fced92f1 CY |
4654 | fflush (display_output); |
4655 | if (preempt_count == 1) | |
4656 | { | |
a41f8bed | 4657 | #ifdef EMACS_OUTQSIZE |
fced92f1 CY |
4658 | if (EMACS_OUTQSIZE (0, &outq) < 0) |
4659 | /* Probably not a tty. Ignore the error and reset | |
4660 | the outq count. */ | |
4661 | outq = PENDING_OUTPUT_COUNT (FRAME_TTY (f->output)); | |
4588ec20 | 4662 | #endif |
fced92f1 CY |
4663 | outq *= 10; |
4664 | if (baud_rate <= outq && baud_rate > 0) | |
4665 | sleep (outq / baud_rate); | |
4666 | } | |
4588ec20 JB |
4667 | } |
4668 | } | |
4588ec20 JB |
4669 | } |
4670 | ||
d012c62b KS |
4671 | #if PERIODIC_PREEMPTION_CHECKING |
4672 | if (!force_p) | |
4673 | { | |
e9a9ae03 | 4674 | EMACS_TIME tm = current_emacs_time (); |
d35af63c | 4675 | if (EMACS_TIME_LT (preemption_next_check, tm)) |
d012c62b | 4676 | { |
e9a9ae03 | 4677 | preemption_next_check = add_emacs_time (tm, preemption_period); |
993d4ab6 KS |
4678 | if (detect_input_pending_ignore_squeezables ()) |
4679 | break; | |
d012c62b KS |
4680 | } |
4681 | } | |
4682 | #else | |
4683 | if (!force_p && (i - 1) % preempt_count == 0) | |
a2d5fca0 | 4684 | detect_input_pending_ignore_squeezables (); |
d012c62b | 4685 | #endif |
a2960116 | 4686 | |
5f5c8ee5 | 4687 | update_frame_line (f, i); |
4588ec20 | 4688 | } |
4588ec20 | 4689 | } |
177c0ea7 | 4690 | |
b98521db | 4691 | lint_assume (0 <= FRAME_LINES (f)); |
59ea14cd | 4692 | pause_p = 0 < i && i < FRAME_LINES (f) - 1; |
4588ec20 JB |
4693 | |
4694 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
27786b2f | 4695 | if (!pause_p) |
4588ec20 | 4696 | { |
48cf7030 | 4697 | if ((cursor_in_echo_area |
5f5c8ee5 | 4698 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 4699 | show the cursor for the message instead of for the |
5f5c8ee5 | 4700 | (now hidden) mini-buffer contents. */ |
2577053b RS |
4701 | || (EQ (minibuf_window, selected_window) |
4702 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 4703 | && !NILP (echo_area_buffer[0]))) |
2577053b | 4704 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 4705 | the active mini-buffer window. */ |
2577053b | 4706 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 4707 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 4708 | { |
7df02016 | 4709 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
4710 | int row, col; |
4711 | ||
4712 | if (cursor_in_echo_area < 0) | |
4713 | { | |
5f5c8ee5 GM |
4714 | /* Negative value of cursor_in_echo_area means put |
4715 | cursor at beginning of line. */ | |
648fa17d JB |
4716 | row = top; |
4717 | col = 0; | |
4718 | } | |
1113d9db | 4719 | else |
648fa17d | 4720 | { |
5f5c8ee5 GM |
4721 | /* Positive value of cursor_in_echo_area means put |
4722 | cursor at the end of the prompt. If the mini-buffer | |
4723 | is several lines high, find the last line that has | |
4724 | any text on it. */ | |
7df02016 | 4725 | row = FRAME_LINES (f); |
177c0ea7 | 4726 | do |
648fa17d | 4727 | { |
5f5c8ee5 GM |
4728 | --row; |
4729 | col = 0; | |
177c0ea7 | 4730 | |
5f5c8ee5 GM |
4731 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
4732 | { | |
4733 | /* Frame rows are filled up with spaces that | |
4734 | must be ignored here. */ | |
5f5c8ee5 GM |
4735 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
4736 | row); | |
4737 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
4738 | struct glyph *last = start + r->used[TEXT_AREA]; | |
4739 | ||
4740 | while (last > start | |
4741 | && (last - 1)->charpos < 0) | |
4742 | --last; | |
177c0ea7 | 4743 | |
5f5c8ee5 GM |
4744 | col = last - start; |
4745 | } | |
648fa17d JB |
4746 | } |
4747 | while (row > top && col == 0); | |
4748 | ||
6395da5c | 4749 | /* Make sure COL is not out of range. */ |
868e640e | 4750 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 4751 | { |
6395da5c | 4752 | /* If we have another row, advance cursor into it. */ |
7df02016 | 4753 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 4754 | { |
7df02016 | 4755 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
4756 | row++; |
4757 | } | |
4758 | /* Otherwise move it back in range. */ | |
4759 | else | |
868e640e | 4760 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
4761 | } |
4762 | } | |
4763 | ||
385ed61f | 4764 | cursor_to (f, row, col); |
1113d9db | 4765 | } |
4588ec20 | 4766 | else |
5f5c8ee5 GM |
4767 | { |
4768 | /* We have only one cursor on terminal frames. Use it to | |
4769 | display the cursor of the selected window. */ | |
4770 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
4771 | if (w->cursor.vpos >= 0 |
4772 | /* The cursor vpos may be temporarily out of bounds | |
4773 | in the following situation: There is one window, | |
4774 | with the cursor in the lower half of it. The window | |
4775 | is split, and a message causes a redisplay before | |
4776 | a new cursor position has been computed. */ | |
7df02016 | 4777 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
4778 | { |
4779 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
4780 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
4781 | ||
d3d50620 DA |
4782 | if (INTEGERP (w->left_margin_cols)) |
4783 | x += XFASTINT (w->left_margin_cols); | |
177c0ea7 | 4784 | |
7df02016 | 4785 | /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */ |
385ed61f | 4786 | cursor_to (f, y, x); |
5f5c8ee5 GM |
4787 | } |
4788 | } | |
4588ec20 JB |
4789 | } |
4790 | ||
ef1b0ba7 | 4791 | #if !PERIODIC_PREEMPTION_CHECKING |
4588ec20 | 4792 | do_pause: |
ef1b0ba7 | 4793 | #endif |
4588ec20 | 4794 | |
5f5c8ee5 | 4795 | clear_desired_matrices (f); |
27786b2f | 4796 | return pause_p; |
4588ec20 JB |
4797 | } |
4798 | ||
4588ec20 | 4799 | |
5f5c8ee5 | 4800 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 4801 | |
59ea14cd | 4802 | static bool |
971de7fb | 4803 | scrolling (struct frame *frame) |
4588ec20 JB |
4804 | { |
4805 | int unchanged_at_top, unchanged_at_bottom; | |
4806 | int window_size; | |
4807 | int changed_lines; | |
38182d90 PE |
4808 | int *old_hash = alloca (FRAME_LINES (frame) * sizeof (int)); |
4809 | int *new_hash = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4810 | int *draw_cost = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4811 | int *old_draw_cost = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 4812 | register int i; |
7df02016 | 4813 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
4814 | struct glyph_matrix *current_matrix = frame->current_matrix; |
4815 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 4816 | |
5f5c8ee5 | 4817 | if (!current_matrix) |
1088b922 | 4818 | emacs_abort (); |
4588ec20 | 4819 | |
5f5c8ee5 GM |
4820 | /* Compute hash codes of all the lines. Also calculate number of |
4821 | changed lines, number of unchanged lines at the beginning, and | |
4822 | number of unchanged lines at the end. */ | |
4588ec20 JB |
4823 | changed_lines = 0; |
4824 | unchanged_at_top = 0; | |
7df02016 KS |
4825 | unchanged_at_bottom = FRAME_LINES (frame); |
4826 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
4827 | { |
4828 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 4829 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 4830 | return 0; |
5f5c8ee5 GM |
4831 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
4832 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
4833 | { |
4834 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
4835 | new_hash[i] = old_hash[i]; | |
4836 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
4837 | draw_cost[i] = INFINITY; | |
4838 | } | |
4588ec20 | 4839 | else |
f188b3c4 | 4840 | { |
5f5c8ee5 GM |
4841 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
4842 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 4843 | } |
4588ec20 JB |
4844 | |
4845 | if (old_hash[i] != new_hash[i]) | |
4846 | { | |
4847 | changed_lines++; | |
7df02016 | 4848 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
4849 | } |
4850 | else if (i == unchanged_at_top) | |
4851 | unchanged_at_top++; | |
5f5c8ee5 | 4852 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
4853 | } |
4854 | ||
4855 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
daf01701 | 4856 | if ((!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4857 | && changed_lines < baud_rate / 2400) |
7df02016 | 4858 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
4859 | return 1; |
4860 | ||
7df02016 | 4861 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
4862 | - unchanged_at_bottom); |
4863 | ||
daf01701 | 4864 | if (FRAME_SCROLL_REGION_OK (frame)) |
4588ec20 | 4865 | free_at_end_vpos -= unchanged_at_bottom; |
daf01701 | 4866 | else if (FRAME_MEMORY_BELOW_FRAME (frame)) |
4588ec20 JB |
4867 | free_at_end_vpos = -1; |
4868 | ||
4869 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 4870 | current frame and desired frame, don't bother with i/d calc. */ |
daf01701 | 4871 | if (!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4872 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
4873 | && (window_size >= |
4874 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 4875 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
4876 | old_hash, new_hash, draw_cost))) |
4877 | return 0; | |
4878 | ||
5f5c8ee5 GM |
4879 | if (window_size < 2) |
4880 | return 0; | |
4881 | ||
502b9b64 | 4882 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 4883 | draw_cost + unchanged_at_top - 1, |
190bb91a | 4884 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
4885 | old_hash + unchanged_at_top - 1, |
4886 | new_hash + unchanged_at_top - 1, | |
4887 | free_at_end_vpos - unchanged_at_top); | |
4888 | ||
4889 | return 0; | |
4890 | } | |
4588ec20 | 4891 | |
4588ec20 | 4892 | |
5f5c8ee5 GM |
4893 | /* Count the number of blanks at the start of the vector of glyphs R |
4894 | which is LEN glyphs long. */ | |
4588ec20 | 4895 | |
4588ec20 | 4896 | static int |
971de7fb | 4897 | count_blanks (struct glyph *r, int len) |
4588ec20 | 4898 | { |
5f5c8ee5 | 4899 | int i; |
177c0ea7 | 4900 | |
5f5c8ee5 GM |
4901 | for (i = 0; i < len; ++i) |
4902 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
4903 | break; | |
4904 | ||
4905 | return i; | |
4588ec20 JB |
4906 | } |
4907 | ||
5f5c8ee5 GM |
4908 | |
4909 | /* Count the number of glyphs in common at the start of the glyph | |
4910 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
4911 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
4912 | ||
4588ec20 | 4913 | static int |
971de7fb | 4914 | count_match (struct glyph *str1, struct glyph *end1, struct glyph *str2, struct glyph *end2) |
4588ec20 | 4915 | { |
5f5c8ee5 GM |
4916 | struct glyph *p1 = str1; |
4917 | struct glyph *p2 = str2; | |
177c0ea7 | 4918 | |
5f5c8ee5 GM |
4919 | while (p1 < end1 |
4920 | && p2 < end2 | |
42186983 | 4921 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 4922 | ++p1, ++p2; |
177c0ea7 | 4923 | |
5f5c8ee5 | 4924 | return p1 - str1; |
4588ec20 JB |
4925 | } |
4926 | ||
5f5c8ee5 | 4927 | |
4588ec20 | 4928 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 4929 | |
5e617bc2 | 4930 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS ((f))]) |
4588ec20 | 4931 | |
5f5c8ee5 GM |
4932 | |
4933 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
4934 | ||
4588ec20 | 4935 | static void |
971de7fb | 4936 | update_frame_line (struct frame *f, int vpos) |
4588ec20 | 4937 | { |
5f5c8ee5 | 4938 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
4939 | int tem; |
4940 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
4941 | struct glyph_matrix *current_matrix = f->current_matrix; |
4942 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
4943 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
4944 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
59ea14cd PE |
4945 | bool must_write_whole_line_p; |
4946 | bool write_spaces_p = FRAME_MUST_WRITE_SPACES (f); | |
4947 | bool colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background | |
4948 | != FACE_TTY_DEFAULT_BG_COLOR); | |
0a894bad GM |
4949 | |
4950 | if (colored_spaces_p) | |
4951 | write_spaces_p = 1; | |
5f5c8ee5 | 4952 | |
26c63686 GM |
4953 | /* Current row not enabled means it has unknown contents. We must |
4954 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
4955 | must_write_whole_line_p = !current_row->enabled_p; |
4956 | if (must_write_whole_line_p) | |
4588ec20 | 4957 | { |
5f5c8ee5 | 4958 | obody = 0; |
4588ec20 JB |
4959 | olen = 0; |
4960 | } | |
4961 | else | |
4962 | { | |
5f5c8ee5 GM |
4963 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
4964 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 4965 | |
4cecaab8 MB |
4966 | /* Ignore trailing spaces, if we can. */ |
4967 | if (!write_spaces_p) | |
4968 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
4969 | olen--; | |
4588ec20 JB |
4970 | } |
4971 | ||
5f5c8ee5 GM |
4972 | current_row->enabled_p = 1; |
4973 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 4974 | |
5f5c8ee5 GM |
4975 | /* If desired line is empty, just clear the line. */ |
4976 | if (!desired_row->enabled_p) | |
4588ec20 JB |
4977 | { |
4978 | nlen = 0; | |
4979 | goto just_erase; | |
4980 | } | |
4981 | ||
5f5c8ee5 GM |
4982 | nbody = desired_row->glyphs[TEXT_AREA]; |
4983 | nlen = desired_row->used[TEXT_AREA]; | |
4984 | nend = nbody + nlen; | |
4985 | ||
4986 | /* If display line has unknown contents, write the whole line. */ | |
4987 | if (must_write_whole_line_p) | |
4988 | { | |
26c63686 | 4989 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 4990 | if (!write_spaces_p) |
74ca462f GM |
4991 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
4992 | --nlen; | |
4993 | ||
26c63686 | 4994 | /* Write the contents of the desired line. */ |
74ca462f | 4995 | if (nlen) |
26c63686 | 4996 | { |
385ed61f KL |
4997 | cursor_to (f, vpos, 0); |
4998 | write_glyphs (f, nbody, nlen); | |
26c63686 | 4999 | } |
177c0ea7 | 5000 | |
26c63686 GM |
5001 | /* Don't call clear_end_of_line if we already wrote the whole |
5002 | line. The cursor will not be at the right margin in that | |
5003 | case but in the line below. */ | |
7df02016 | 5004 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 | 5005 | { |
385ed61f KL |
5006 | cursor_to (f, vpos, nlen); |
5007 | clear_end_of_line (f, FRAME_TOTAL_COLS (f)); | |
26c63686 | 5008 | } |
58827478 GM |
5009 | else |
5010 | /* Make sure we are in the right row, otherwise cursor movement | |
5011 | with cmgoto might use `ch' in the wrong row. */ | |
385ed61f | 5012 | cursor_to (f, vpos, 0); |
177c0ea7 | 5013 | |
5f5c8ee5 GM |
5014 | make_current (desired_matrix, current_matrix, vpos); |
5015 | return; | |
5016 | } | |
4588ec20 JB |
5017 | |
5018 | /* Pretend trailing spaces are not there at all, | |
5019 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
5020 | if (!write_spaces_p) |
5021 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
5022 | nlen--; | |
4588ec20 JB |
5023 | |
5024 | /* If there's no i/d char, quickly do the best we can without it. */ | |
daf01701 | 5025 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
4588ec20 | 5026 | { |
5f5c8ee5 | 5027 | int i, j; |
4588ec20 | 5028 | |
5f5c8ee5 GM |
5029 | /* Find the first glyph in desired row that doesn't agree with |
5030 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
5031 | for (i = 0; i < nlen; i++) |
5032 | { | |
5f5c8ee5 | 5033 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 5034 | { |
5f5c8ee5 GM |
5035 | /* Find the end of the run of different glyphs. */ |
5036 | j = i + 1; | |
5037 | while (j < nlen | |
5038 | && (j >= olen | |
5039 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
5040 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
5041 | ++j; | |
177c0ea7 JB |
5042 | |
5043 | /* Output this run of non-matching chars. */ | |
385ed61f KL |
5044 | cursor_to (f, vpos, i); |
5045 | write_glyphs (f, nbody + i, j - i); | |
5f5c8ee5 | 5046 | i = j - 1; |
4588ec20 JB |
5047 | |
5048 | /* Now find the next non-match. */ | |
5049 | } | |
5050 | } | |
5051 | ||
5052 | /* Clear the rest of the line, or the non-clear part of it. */ | |
5053 | if (olen > nlen) | |
5054 | { | |
385ed61f KL |
5055 | cursor_to (f, vpos, nlen); |
5056 | clear_end_of_line (f, olen); | |
4588ec20 JB |
5057 | } |
5058 | ||
5f5c8ee5 GM |
5059 | /* Make current row = desired row. */ |
5060 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
5061 | return; |
5062 | } | |
5063 | ||
5f5c8ee5 GM |
5064 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
5065 | characters in a row. */ | |
5066 | ||
4588ec20 JB |
5067 | if (!olen) |
5068 | { | |
5f5c8ee5 GM |
5069 | /* If current line is blank, skip over initial spaces, if |
5070 | possible, and write the rest. */ | |
4cecaab8 | 5071 | if (write_spaces_p) |
5f5c8ee5 GM |
5072 | nsp = 0; |
5073 | else | |
5074 | nsp = count_blanks (nbody, nlen); | |
5075 | ||
4588ec20 JB |
5076 | if (nlen > nsp) |
5077 | { | |
385ed61f KL |
5078 | cursor_to (f, vpos, nsp); |
5079 | write_glyphs (f, nbody + nsp, nlen - nsp); | |
4588ec20 JB |
5080 | } |
5081 | ||
502b9b64 | 5082 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 5083 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
5084 | return; |
5085 | } | |
5086 | ||
4588ec20 | 5087 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 5088 | osp = count_blanks (obody, olen); |
4cecaab8 | 5089 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 5090 | |
5f5c8ee5 GM |
5091 | /* Compute number of matching chars starting with first non-blank. */ |
5092 | begmatch = count_match (obody + osp, obody + olen, | |
5093 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
5094 | |
5095 | /* Spaces in new match implicit space past the end of old. */ | |
5096 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 5097 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
5098 | { |
5099 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
5100 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
5101 | ++begmatch; | |
4588ec20 JB |
5102 | } |
5103 | ||
5104 | /* Avoid doing insert/delete char | |
5105 | just cause number of leading spaces differs | |
5f5c8ee5 | 5106 | when the following text does not match. */ |
4588ec20 JB |
5107 | if (begmatch == 0 && osp != nsp) |
5108 | osp = nsp = min (osp, nsp); | |
5109 | ||
5110 | /* Find matching characters at end of line */ | |
5111 | op1 = obody + olen; | |
5112 | np1 = nbody + nlen; | |
5113 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
5114 | while (op1 > op2 |
5115 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
5116 | { |
5117 | op1--; | |
5118 | np1--; | |
5119 | } | |
5120 | endmatch = obody + olen - op1; | |
5121 | ||
4588ec20 JB |
5122 | /* tem gets the distance to insert or delete. |
5123 | endmatch is how many characters we save by doing so. | |
5124 | Is it worth it? */ | |
5125 | ||
5126 | tem = (nlen - nsp) - (olen - osp); | |
5127 | if (endmatch && tem | |
daf01701 | 5128 | && (!FRAME_CHAR_INS_DEL_OK (f) |
8a56675d | 5129 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
5130 | endmatch = 0; |
5131 | ||
5132 | /* nsp - osp is the distance to insert or delete. | |
5133 | If that is nonzero, begmatch is known to be nonzero also. | |
5134 | begmatch + endmatch is how much we save by doing the ins/del. | |
5135 | Is it worth it? */ | |
5136 | ||
5137 | if (nsp != osp | |
daf01701 | 5138 | && (!FRAME_CHAR_INS_DEL_OK (f) |
c363a1d6 | 5139 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
5140 | { |
5141 | begmatch = 0; | |
5142 | endmatch = 0; | |
5143 | osp = nsp = min (osp, nsp); | |
5144 | } | |
5145 | ||
5146 | /* Now go through the line, inserting, writing and | |
5147 | deleting as appropriate. */ | |
5148 | ||
5149 | if (osp > nsp) | |
5150 | { | |
385ed61f KL |
5151 | cursor_to (f, vpos, nsp); |
5152 | delete_glyphs (f, osp - nsp); | |
4588ec20 JB |
5153 | } |
5154 | else if (nsp > osp) | |
5155 | { | |
5156 | /* If going to delete chars later in line | |
5157 | and insert earlier in the line, | |
5158 | must delete first to avoid losing data in the insert */ | |
5159 | if (endmatch && nlen < olen + nsp - osp) | |
5160 | { | |
385ed61f KL |
5161 | cursor_to (f, vpos, nlen - endmatch + osp - nsp); |
5162 | delete_glyphs (f, olen + nsp - osp - nlen); | |
4588ec20 JB |
5163 | olen = nlen - (nsp - osp); |
5164 | } | |
385ed61f KL |
5165 | cursor_to (f, vpos, osp); |
5166 | insert_glyphs (f, 0, nsp - osp); | |
4588ec20 JB |
5167 | } |
5168 | olen += nsp - osp; | |
5169 | ||
5170 | tem = nsp + begmatch + endmatch; | |
5171 | if (nlen != tem || olen != tem) | |
5172 | { | |
4588ec20 JB |
5173 | if (!endmatch || nlen == olen) |
5174 | { | |
c363a1d6 GM |
5175 | /* If new text being written reaches right margin, there is |
5176 | no need to do clear-to-eol at the end of this function | |
5177 | (and it would not be safe, since cursor is not going to | |
5178 | be "at the margin" after the text is done). */ | |
7df02016 | 5179 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 5180 | olen = 0; |
c363a1d6 GM |
5181 | |
5182 | /* Function write_glyphs is prepared to do nothing | |
5183 | if passed a length <= 0. Check it here to avoid | |
5184 | unnecessary cursor movement. */ | |
5185 | if (nlen - tem > 0) | |
5186 | { | |
385ed61f KL |
5187 | cursor_to (f, vpos, nsp + begmatch); |
5188 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
c363a1d6 | 5189 | } |
4588ec20 JB |
5190 | } |
5191 | else if (nlen > olen) | |
5192 | { | |
24e86043 KH |
5193 | /* Here, we used to have the following simple code: |
5194 | ---------------------------------------- | |
5195 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
5196 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
5197 | ---------------------------------------- | |
5198 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
5199 | is a padding glyph. */ | |
5200 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
5201 | int del; | |
5f5c8ee5 | 5202 | |
385ed61f | 5203 | cursor_to (f, vpos, nsp + begmatch); |
177c0ea7 | 5204 | |
5f5c8ee5 | 5205 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
5206 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
5207 | out--; | |
385ed61f | 5208 | write_glyphs (f, nbody + nsp + begmatch, out); |
177c0ea7 | 5209 | |
5f5c8ee5 GM |
5210 | /* If we left columns to be overwritten, we must delete them. */ |
5211 | del = olen - tem - out; | |
c363a1d6 | 5212 | if (del > 0) |
385ed61f | 5213 | delete_glyphs (f, del); |
177c0ea7 | 5214 | |
5f5c8ee5 | 5215 | /* At last, we insert columns not yet written out. */ |
385ed61f | 5216 | insert_glyphs (f, nbody + nsp + begmatch + out, nlen - olen + del); |
5f5c8ee5 GM |
5217 | olen = nlen; |
5218 | } | |
5219 | else if (olen > nlen) | |
5220 | { | |
385ed61f KL |
5221 | cursor_to (f, vpos, nsp + begmatch); |
5222 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
5223 | delete_glyphs (f, olen - nlen); | |
5f5c8ee5 GM |
5224 | olen = nlen; |
5225 | } | |
bd9e3e75 | 5226 | } |
5f5c8ee5 GM |
5227 | |
5228 | just_erase: | |
5229 | /* If any unerased characters remain after the new line, erase them. */ | |
5230 | if (olen > nlen) | |
078b3696 | 5231 | { |
385ed61f KL |
5232 | cursor_to (f, vpos, nlen); |
5233 | clear_end_of_line (f, olen); | |
078b3696 | 5234 | } |
5f5c8ee5 GM |
5235 | |
5236 | /* Exchange contents between current_frame and new_frame. */ | |
5237 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5238 | } |
5f5c8ee5 GM |
5239 | |
5240 | ||
078b3696 | 5241 | \f |
5f5c8ee5 GM |
5242 | /*********************************************************************** |
5243 | X/Y Position -> Buffer Position | |
5244 | ***********************************************************************/ | |
5245 | ||
a1b0a6db | 5246 | /* Determine what's under window-relative pixel position (*X, *Y). |
2396cbba | 5247 | Return the OBJECT (string or buffer) that's there. |
6b61353c | 5248 | Return in *POS the position in that object. |
2396cbba EZ |
5249 | Adjust *X and *Y to character positions. |
5250 | Return in *DX and *DY the pixel coordinates of the click, | |
5251 | relative to the top left corner of OBJECT, or relative to | |
5252 | the top left corner of the character glyph at (*X, *Y) | |
5253 | if OBJECT is nil. | |
5254 | Return WIDTH and HEIGHT of the object at (*X, *Y), or zero | |
5255 | if the coordinates point to an empty area of the display. */ | |
5f5c8ee5 | 5256 | |
6b61353c | 5257 | Lisp_Object |
971de7fb | 5258 | 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 | 5259 | { |
5f5c8ee5 | 5260 | struct it it; |
707ea971 | 5261 | Lisp_Object old_current_buffer = Fcurrent_buffer (); |
5f5c8ee5 | 5262 | struct text_pos startp; |
6b61353c KH |
5263 | Lisp_Object string; |
5264 | struct glyph_row *row; | |
cedd7cd9 KS |
5265 | #ifdef HAVE_WINDOW_SYSTEM |
5266 | struct image *img = 0; | |
5267 | #endif | |
2396cbba | 5268 | int x0, x1, to_x; |
57b3e30b | 5269 | void *itdata = NULL; |
5f5c8ee5 | 5270 | |
707ea971 CY |
5271 | /* We used to set current_buffer directly here, but that does the |
5272 | wrong thing with `face-remapping-alist' (bug#2044). */ | |
d3d50620 | 5273 | Fset_buffer (w->buffer); |
57b3e30b | 5274 | itdata = bidi_shelve_cache (); |
d3d50620 | 5275 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
5f5c8ee5 GM |
5276 | CHARPOS (startp) = min (ZV, max (BEGV, CHARPOS (startp))); |
5277 | BYTEPOS (startp) = min (ZV_BYTE, max (BEGV_BYTE, BYTEPOS (startp))); | |
5278 | start_display (&it, w, startp); | |
352ec8ff EZ |
5279 | /* start_display takes into account the header-line row, but IT's |
5280 | vpos still counts from the glyph row that includes the window's | |
5281 | start position. Adjust for a possible header-line row. */ | |
59ea14cd | 5282 | it.vpos += WINDOW_WANTS_HEADER_LINE_P (w); |
177c0ea7 | 5283 | |
9173a8fb | 5284 | x0 = *x; |
2396cbba EZ |
5285 | |
5286 | /* First, move to the beginning of the row corresponding to *Y. We | |
5287 | need to be in that row to get the correct value of base paragraph | |
40629f17 | 5288 | direction for the text at (*X, *Y). */ |
2396cbba EZ |
5289 | move_it_to (&it, -1, 0, *y, -1, MOVE_TO_X | MOVE_TO_Y); |
5290 | ||
5291 | /* TO_X is the pixel position that the iterator will compute for the | |
40629f17 EZ |
5292 | glyph at *X. We add it.first_visible_x because iterator |
5293 | positions include the hscroll. */ | |
2396cbba EZ |
5294 | to_x = x0 + it.first_visible_x; |
5295 | if (it.bidi_it.paragraph_dir == R2L) | |
5296 | /* For lines in an R2L paragraph, we need to mirror TO_X wrt the | |
5297 | text area. This is because the iterator, even in R2L | |
5298 | paragraphs, delivers glyphs as if they started at the left | |
5299 | margin of the window. (When we actually produce glyphs for | |
5300 | display, we reverse their order in PRODUCE_GLYPHS, but the | |
5301 | iterator doesn't know about that.) The following line adjusts | |
5302 | the pixel position to the iterator geometry, which is what | |
40629f17 EZ |
5303 | move_it_* routines use. (The -1 is because in a window whose |
5304 | text-area width is W, the rightmost pixel position is W-1, and | |
5305 | it should be mirrored into zero pixel position.) */ | |
5306 | to_x = window_box_width (w, TEXT_AREA) - to_x - 1; | |
5307 | ||
5308 | /* Now move horizontally in the row to the glyph under *X. Second | |
5309 | argument is ZV to prevent move_it_in_display_line from matching | |
5310 | based on buffer positions. */ | |
2396cbba | 5311 | move_it_in_display_line (&it, ZV, to_x, MOVE_TO_X); |
35928349 | 5312 | bidi_unshelve_cache (itdata, 0); |
177c0ea7 | 5313 | |
707ea971 | 5314 | Fset_buffer (old_current_buffer); |
a1b0a6db | 5315 | |
6b61353c KH |
5316 | *dx = x0 + it.first_visible_x - it.current_x; |
5317 | *dy = *y - it.current_y; | |
5318 | ||
d3d50620 | 5319 | string = w->buffer; |
6b61353c KH |
5320 | if (STRINGP (it.string)) |
5321 | string = it.string; | |
a1b0a6db | 5322 | *pos = it.current; |
86282aab KH |
5323 | if (it.what == IT_COMPOSITION |
5324 | && it.cmp_it.nchars > 1 | |
5325 | && it.cmp_it.reversed_p) | |
5326 | { | |
5327 | /* The current display element is a grapheme cluster in a | |
5328 | composition. In that case, we need the position of the first | |
5329 | character of the cluster. But, as it.cmp_it.reversed_p is 1, | |
5330 | it.current points to the last character of the cluster, thus | |
5331 | we must move back to the first character of the same | |
5332 | cluster. */ | |
5333 | CHARPOS (pos->pos) -= it.cmp_it.nchars - 1; | |
5334 | if (STRINGP (it.string)) | |
5335 | BYTEPOS (pos->pos) = string_char_to_byte (string, CHARPOS (pos->pos)); | |
5336 | else | |
d3d50620 | 5337 | BYTEPOS (pos->pos) = buf_charpos_to_bytepos (XBUFFER (w->buffer), |
425cc014 | 5338 | CHARPOS (pos->pos)); |
86282aab | 5339 | } |
6b61353c KH |
5340 | |
5341 | #ifdef HAVE_WINDOW_SYSTEM | |
5342 | if (it.what == IT_IMAGE) | |
5343 | { | |
6b61353c KH |
5344 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5345 | && !NILP (img->spec)) | |
5346 | *object = img->spec; | |
5347 | } | |
5348 | #endif | |
5349 | ||
b70d98e1 KS |
5350 | if (it.vpos < w->current_matrix->nrows |
5351 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5352 | row->enabled_p)) | |
6b61353c KH |
5353 | { |
5354 | if (it.hpos < row->used[TEXT_AREA]) | |
5355 | { | |
5356 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6b61353c | 5357 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5358 | if (img) |
5359 | { | |
5360 | *dy -= row->ascent - glyph->ascent; | |
4be9765d KH |
5361 | *dx += glyph->slice.img.x; |
5362 | *dy += glyph->slice.img.y; | |
cedd7cd9 KS |
5363 | /* Image slices positions are still relative to the entire image */ |
5364 | *width = img->width; | |
5365 | *height = img->height; | |
5366 | } | |
5367 | else | |
6b61353c | 5368 | #endif |
cedd7cd9 KS |
5369 | { |
5370 | *width = glyph->pixel_width; | |
5371 | *height = glyph->ascent + glyph->descent; | |
5372 | } | |
6b61353c KH |
5373 | } |
5374 | else | |
5375 | { | |
5376 | *width = 0; | |
5377 | *height = row->height; | |
5378 | } | |
5379 | } | |
5380 | else | |
5381 | { | |
5382 | *width = *height = 0; | |
5383 | } | |
5384 | ||
5385 | /* Add extra (default width) columns if clicked after EOL. */ | |
5e617bc2 | 5386 | x1 = max (0, it.current_x + it.pixel_width - it.first_visible_x); |
6b61353c KH |
5387 | if (x0 > x1) |
5388 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5389 | ||
5390 | *x = it.hpos; | |
5391 | *y = it.vpos; | |
5392 | ||
5393 | return string; | |
5f5c8ee5 | 5394 | } |
4588ec20 | 5395 | |
5f5c8ee5 GM |
5396 | |
5397 | /* Value is the string under window-relative coordinates X/Y in the | |
6b61353c KH |
5398 | mode line or header line (PART says which) of window W, or nil if none. |
5399 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
5400 | |
5401 | Lisp_Object | |
ace1712c | 5402 | mode_line_string (struct window *w, enum window_part part, |
d311d28c | 5403 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5404 | int *dx, int *dy, int *width, int *height) |
5f5c8ee5 GM |
5405 | { |
5406 | struct glyph_row *row; | |
5407 | struct glyph *glyph, *end; | |
6b61353c | 5408 | int x0, y0; |
5f5c8ee5 GM |
5409 | Lisp_Object string = Qnil; |
5410 | ||
641bdbf3 | 5411 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
5412 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
5413 | else | |
045dee35 | 5414 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
6b61353c KH |
5415 | y0 = *y - row->y; |
5416 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
5f5c8ee5 GM |
5417 | |
5418 | if (row->mode_line_p && row->enabled_p) | |
4588ec20 | 5419 | { |
5f5c8ee5 GM |
5420 | /* Find the glyph under X. If we find one with a string object, |
5421 | it's the one we were looking for. */ | |
5422 | glyph = row->glyphs[TEXT_AREA]; | |
5423 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 5424 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5425 | x0 -= glyph->pixel_width; |
5426 | *x = glyph - row->glyphs[TEXT_AREA]; | |
5427 | if (glyph < end) | |
5428 | { | |
5429 | string = glyph->object; | |
5430 | *charpos = glyph->charpos; | |
5431 | *width = glyph->pixel_width; | |
5432 | *height = glyph->ascent + glyph->descent; | |
5433 | #ifdef HAVE_WINDOW_SYSTEM | |
5434 | if (glyph->type == IMAGE_GLYPH) | |
5435 | { | |
5436 | struct image *img; | |
5437 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5438 | if (img != NULL) | |
5439 | *object = img->spec; | |
5440 | y0 -= row->ascent - glyph->ascent; | |
5441 | } | |
5442 | #endif | |
5443 | } | |
5444 | else | |
5445 | { | |
5446 | /* Add extra (default width) columns if clicked after EOL. */ | |
5447 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5448 | *width = 0; | |
5449 | *height = row->height; | |
5450 | } | |
5451 | } | |
5452 | else | |
5453 | { | |
5454 | *x = 0; | |
5455 | x0 = 0; | |
5456 | *width = *height = 0; | |
4588ec20 | 5457 | } |
5f5c8ee5 | 5458 | |
6b61353c KH |
5459 | *dx = x0; |
5460 | *dy = y0; | |
5461 | ||
5f5c8ee5 | 5462 | return string; |
4588ec20 | 5463 | } |
5f5c8ee5 GM |
5464 | |
5465 | ||
db1db309 GM |
5466 | /* Value is the string under window-relative coordinates X/Y in either |
5467 | marginal area, or nil if none. *CHARPOS is set to the position in | |
5468 | the string returned. */ | |
5469 | ||
5470 | Lisp_Object | |
ace1712c | 5471 | marginal_area_string (struct window *w, enum window_part part, |
d311d28c | 5472 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5473 | int *dx, int *dy, int *width, int *height) |
db1db309 GM |
5474 | { |
5475 | struct glyph_row *row = w->current_matrix->rows; | |
5476 | struct glyph *glyph, *end; | |
6b61353c | 5477 | int x0, y0, i, wy = *y; |
641bdbf3 | 5478 | int area; |
db1db309 GM |
5479 | Lisp_Object string = Qnil; |
5480 | ||
641bdbf3 | 5481 | if (part == ON_LEFT_MARGIN) |
db1db309 | 5482 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 5483 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
5484 | area = RIGHT_MARGIN_AREA; |
5485 | else | |
1088b922 | 5486 | emacs_abort (); |
db1db309 GM |
5487 | |
5488 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
5489 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
5490 | break; | |
6b61353c KH |
5491 | y0 = *y - row->y; |
5492 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
db1db309 GM |
5493 | |
5494 | if (row->enabled_p) | |
5495 | { | |
5496 | /* Find the glyph under X. If we find one with a string object, | |
5497 | it's the one we were looking for. */ | |
db1db309 | 5498 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 5499 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5500 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5501 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) |
5502 | + window_box_width (w, LEFT_MARGIN_AREA) | |
5503 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 5504 | else |
7df02016 | 5505 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5506 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5507 | : 0); |
5508 | ||
6b61353c KH |
5509 | glyph = row->glyphs[area]; |
5510 | end = glyph + row->used[area]; | |
cfde341f | 5511 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5512 | x0 -= glyph->pixel_width; |
5513 | *x = glyph - row->glyphs[area]; | |
5514 | if (glyph < end) | |
5515 | { | |
5516 | string = glyph->object; | |
5517 | *charpos = glyph->charpos; | |
5518 | *width = glyph->pixel_width; | |
5519 | *height = glyph->ascent + glyph->descent; | |
5520 | #ifdef HAVE_WINDOW_SYSTEM | |
5521 | if (glyph->type == IMAGE_GLYPH) | |
5522 | { | |
5523 | struct image *img; | |
5524 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5525 | if (img != NULL) | |
5526 | *object = img->spec; | |
5527 | y0 -= row->ascent - glyph->ascent; | |
4be9765d KH |
5528 | x0 += glyph->slice.img.x; |
5529 | y0 += glyph->slice.img.y; | |
6b61353c KH |
5530 | } |
5531 | #endif | |
5532 | } | |
5533 | else | |
5534 | { | |
5535 | /* Add extra (default width) columns if clicked after EOL. */ | |
5536 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5537 | *width = 0; | |
5538 | *height = row->height; | |
5539 | } | |
db1db309 | 5540 | } |
6b61353c KH |
5541 | else |
5542 | { | |
5543 | x0 = 0; | |
5544 | *x = 0; | |
5545 | *width = *height = 0; | |
5546 | } | |
5547 | ||
5548 | *dx = x0; | |
5549 | *dy = y0; | |
db1db309 GM |
5550 | |
5551 | return string; | |
5552 | } | |
5553 | ||
5554 | ||
5f5c8ee5 GM |
5555 | /*********************************************************************** |
5556 | Changing Frame Sizes | |
5557 | ***********************************************************************/ | |
4588ec20 JB |
5558 | |
5559 | #ifdef SIGWINCH | |
5f5c8ee5 | 5560 | |
20ef56db PE |
5561 | static void deliver_window_change_signal (int); |
5562 | ||
9af30bdf | 5563 | static void |
20ef56db | 5564 | handle_window_change_signal (int sig) |
4588ec20 JB |
5565 | { |
5566 | int width, height; | |
28d7d09f | 5567 | struct tty_display_info *tty; |
4d553a13 | 5568 | |
9628b887 KL |
5569 | /* The frame size change obviously applies to a single |
5570 | termcap-controlled terminal, but we can't decide which. | |
5571 | Therefore, we resize the frames corresponding to each tty. | |
9628b887 KL |
5572 | */ |
5573 | for (tty = tty_list; tty; tty = tty->next) { | |
4588ec20 | 5574 | |
0a125897 KL |
5575 | if (! tty->term_initted) |
5576 | continue; | |
4588ec20 | 5577 | |
db878925 DN |
5578 | /* Suspended tty frames have tty->input == NULL avoid trying to |
5579 | use it. */ | |
5580 | if (!tty->input) | |
5581 | continue; | |
5582 | ||
0b0d3e0b | 5583 | get_tty_size (fileno (tty->input), &width, &height); |
3fc809e2 | 5584 | |
bedeffcf | 5585 | if (width > 5 && height > 2) { |
9628b887 | 5586 | Lisp_Object tail, frame; |
3fc809e2 | 5587 | |
9628b887 | 5588 | FOR_EACH_FRAME (tail, frame) |
4d553a13 KL |
5589 | if (FRAME_TERMCAP_P (XFRAME (frame)) && FRAME_TTY (XFRAME (frame)) == tty) |
5590 | /* Record the new sizes, but don't reallocate the data | |
5591 | structures now. Let that be done later outside of the | |
5592 | signal handler. */ | |
5593 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); | |
9628b887 | 5594 | } |
4588ec20 | 5595 | } |
20ef56db | 5596 | } |
3fc809e2 | 5597 | |
20ef56db PE |
5598 | static void |
5599 | deliver_window_change_signal (int sig) | |
5600 | { | |
4d7e6e51 | 5601 | deliver_process_signal (sig, handle_window_change_signal); |
4588ec20 JB |
5602 | } |
5603 | #endif /* SIGWINCH */ | |
5604 | ||
5605 | ||
59ea14cd PE |
5606 | /* Do any change in frame size that was requested by a signal. |
5607 | SAFE means this function is called from a place where it is | |
5608 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 5609 | |
dfcf069d | 5610 | void |
59ea14cd | 5611 | do_pending_window_change (bool safe) |
4588ec20 | 5612 | { |
20ef56db | 5613 | /* If window change signal handler should have run before, run it now. */ |
b96fd3e8 GM |
5614 | if (redisplaying_p && !safe) |
5615 | return; | |
177c0ea7 | 5616 | |
4588ec20 JB |
5617 | while (delayed_size_change) |
5618 | { | |
35f56f96 | 5619 | Lisp_Object tail, frame; |
4588ec20 JB |
5620 | |
5621 | delayed_size_change = 0; | |
5622 | ||
35f56f96 | 5623 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5624 | { |
5f5c8ee5 | 5625 | struct frame *f = XFRAME (frame); |
35f56f96 | 5626 | |
7df02016 KS |
5627 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
5628 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
5629 | 0, 0, safe); | |
4588ec20 JB |
5630 | } |
5631 | } | |
5632 | } | |
5633 | ||
5634 | ||
502b9b64 | 5635 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 5636 | indicate no change is to take place. |
4588ec20 | 5637 | |
59ea14cd PE |
5638 | If DELAY, assume we're being called from a signal handler, and |
5639 | queue the change for later - perhaps the next redisplay. | |
5640 | Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
5641 | from a signal handler. |
5642 | ||
59ea14cd | 5643 | SAFE means this function is called from a place where it's |
b96fd3e8 | 5644 | safe to change frame sizes while a redisplay is in progress. */ |
b6a65ac2 | 5645 | |
dfcf069d | 5646 | void |
59ea14cd PE |
5647 | change_frame_size (struct frame *f, int newheight, int newwidth, |
5648 | bool pretend, bool delay, bool safe) | |
45140e01 RS |
5649 | { |
5650 | Lisp_Object tail, frame; | |
3826ea1a | 5651 | |
9628b887 | 5652 | if (FRAME_MSDOS_P (f)) |
45140e01 | 5653 | { |
9628b887 KL |
5654 | /* On MS-DOS, all frames use the same screen, so a change in |
5655 | size affects all frames. Termcap now supports multiple | |
5656 | ttys. */ | |
45140e01 | 5657 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 5658 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 5659 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 5660 | pretend, delay, safe); |
45140e01 RS |
5661 | } |
5662 | else | |
b96fd3e8 | 5663 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
5664 | } |
5665 | ||
5666 | static void | |
59ea14cd PE |
5667 | change_frame_size_1 (struct frame *f, int newheight, int newwidth, |
5668 | bool pretend, bool delay, bool safe) | |
4588ec20 | 5669 | { |
7df02016 | 5670 | int new_frame_total_cols; |
d311d28c | 5671 | ptrdiff_t count = SPECPDL_INDEX (); |
3826ea1a | 5672 | |
4588ec20 | 5673 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 5674 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 5675 | { |
7df02016 KS |
5676 | f->new_text_lines = newheight; |
5677 | f->new_text_cols = newwidth; | |
4588ec20 JB |
5678 | delayed_size_change = 1; |
5679 | return; | |
5680 | } | |
5681 | ||
502b9b64 | 5682 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
5683 | f->new_text_lines = 0; |
5684 | f->new_text_cols = 0; | |
b6a65ac2 | 5685 | |
08f7aa3e | 5686 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 5687 | if (newheight == 0) |
7df02016 | 5688 | newheight = FRAME_LINES (f); |
ae19c6f2 | 5689 | if (newwidth == 0) |
7df02016 | 5690 | newwidth = FRAME_COLS (f); |
3826ea1a | 5691 | |
3b95a6f9 | 5692 | /* Compute width of windows in F. */ |
b6a65ac2 | 5693 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 5694 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 | 5695 | |
3b95a6f9 MR |
5696 | /* This is the width of the frame with vertical scroll bars and fringe |
5697 | columns. Do this after rounding - see discussion of bug#9723. */ | |
5698 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); | |
5699 | ||
b6a65ac2 | 5700 | /* If we're not changing the frame size, quit now. */ |
3b95a6f9 MR |
5701 | /* Frame width may be unchanged but the text portion may change, for |
5702 | example, fullscreen and remove/add scroll bar. */ | |
7df02016 | 5703 | if (newheight == FRAME_LINES (f) |
3b95a6f9 MR |
5704 | /* Text portion unchanged? */ |
5705 | && newwidth == FRAME_COLS (f) | |
5706 | /* Frame width unchanged? */ | |
5707 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) | |
4588ec20 JB |
5708 | return; |
5709 | ||
4d7e6e51 | 5710 | block_input (); |
cbb95688 | 5711 | |
886a8a6c KH |
5712 | #ifdef MSDOS |
5713 | /* We only can set screen dimensions to certain values supported | |
5714 | by our video hardware. Try to find the smallest size greater | |
5715 | or equal to the requested dimensions. */ | |
5716 | dos_set_window_size (&newheight, &newwidth); | |
5717 | #endif | |
5718 | ||
7df02016 | 5719 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 5720 | { |
562dd5e9 | 5721 | resize_frame_windows (f, newheight, 0); |
b6a65ac2 | 5722 | |
48e482e6 EZ |
5723 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5724 | manipulating video hardware. */ | |
5725 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5726 | FrameRows (FRAME_TTY (f)) = newheight; |
4588ec20 JB |
5727 | } |
5728 | ||
7df02016 | 5729 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 5730 | { |
562dd5e9 | 5731 | resize_frame_windows (f, new_frame_total_cols, 1); |
4588ec20 | 5732 | |
48e482e6 EZ |
5733 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5734 | manipulating video hardware. */ | |
5735 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5736 | FrameCols (FRAME_TTY (f)) = newwidth; |
5f5c8ee5 | 5737 | |
e69b0960 | 5738 | if (WINDOWP (f->tool_bar_window)) |
e8c17b81 | 5739 | wset_total_cols (XWINDOW (f->tool_bar_window), make_number (newwidth)); |
4588ec20 JB |
5740 | } |
5741 | ||
7df02016 KS |
5742 | FRAME_LINES (f) = newheight; |
5743 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 5744 | |
5f5c8ee5 GM |
5745 | { |
5746 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
5747 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 5748 | |
5f5c8ee5 GM |
5749 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
5750 | &text_area_height); | |
5751 | if (w->cursor.x >= text_area_x + text_area_width) | |
5752 | w->cursor.hpos = w->cursor.x = 0; | |
5753 | if (w->cursor.y >= text_area_y + text_area_height) | |
5754 | w->cursor.vpos = w->cursor.y = 0; | |
5755 | } | |
986e61b8 | 5756 | |
5f5c8ee5 | 5757 | adjust_glyphs (f); |
5f5c8ee5 | 5758 | calculate_costs (f); |
cb02fa39 GM |
5759 | SET_FRAME_GARBAGED (f); |
5760 | f->resized_p = 1; | |
97cf50e7 | 5761 | |
4d7e6e51 | 5762 | unblock_input (); |
61730a69 | 5763 | |
66322887 | 5764 | record_unwind_current_buffer (); |
e523f7e5 | 5765 | |
ef264c42 | 5766 | run_window_configuration_change_hook (f); |
e523f7e5 RS |
5767 | |
5768 | unbind_to (count, Qnil); | |
4588ec20 | 5769 | } |
5f5c8ee5 GM |
5770 | |
5771 | ||
4588ec20 | 5772 | \f |
5f5c8ee5 GM |
5773 | /*********************************************************************** |
5774 | Terminal Related Lisp Functions | |
5775 | ***********************************************************************/ | |
5776 | ||
5777 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 5778 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
5779 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
5780 | FILE = nil means just close any termscript file currently open. */) | |
5842a27b | 5781 | (Lisp_Object file) |
5f5c8ee5 | 5782 | { |
0b0d3e0b KL |
5783 | struct tty_display_info *tty; |
5784 | ||
7d2f1216 EZ |
5785 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ()) |
5786 | && ! FRAME_MSDOS_P (SELECTED_FRAME ())) | |
0b0d3e0b KL |
5787 | error ("Current frame is not on a tty device"); |
5788 | ||
5789 | tty = CURTTY (); | |
5790 | ||
5791 | if (tty->termscript != 0) | |
e18c7093 | 5792 | { |
4d7e6e51 | 5793 | block_input (); |
0b0d3e0b | 5794 | fclose (tty->termscript); |
4d7e6e51 | 5795 | unblock_input (); |
e18c7093 | 5796 | } |
0b0d3e0b | 5797 | tty->termscript = 0; |
5f5c8ee5 GM |
5798 | |
5799 | if (! NILP (file)) | |
5800 | { | |
5801 | file = Fexpand_file_name (file, Qnil); | |
42a5b22f | 5802 | tty->termscript = fopen (SSDATA (file), "w"); |
0b0d3e0b | 5803 | if (tty->termscript == 0) |
5f5c8ee5 GM |
5804 | report_file_error ("Opening termscript", Fcons (file, Qnil)); |
5805 | } | |
5806 | return Qnil; | |
5807 | } | |
5808 | ||
5809 | ||
4588ec20 | 5810 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
62af879c | 5811 | Ssend_string_to_terminal, 1, 2, 0, |
7ee72033 | 5812 | doc: /* Send STRING to the terminal without alteration. |
62af879c KL |
5813 | Control characters in STRING will have terminal-dependent effects. |
5814 | ||
6ed8eeff | 5815 | Optional parameter TERMINAL specifies the tty terminal device to use. |
558759e4 AM |
5816 | It may be a terminal object, a frame, or nil for the terminal used by |
5817 | the currently selected frame. In batch mode, STRING is sent to stdout | |
5818 | when TERMINAL is nil. */) | |
5842a27b | 5819 | (Lisp_Object string, Lisp_Object terminal) |
4588ec20 | 5820 | { |
7cef7ce3 SM |
5821 | struct terminal *t = get_terminal (terminal, 1); |
5822 | FILE *out; | |
0b0d3e0b | 5823 | |
94f3db62 | 5824 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 5825 | CHECK_STRING (string); |
4d7e6e51 | 5826 | block_input (); |
0b0d3e0b | 5827 | |
6ed8eeff KL |
5828 | if (!t) |
5829 | error ("Unknown terminal device"); | |
0b0d3e0b | 5830 | |
7cef7ce3 SM |
5831 | if (t->type == output_initial) |
5832 | out = stdout; | |
5833 | else if (t->type != output_termcap && t->type != output_msdos_raw) | |
5834 | error ("Device %d is not a termcap terminal device", t->id); | |
5835 | else | |
5836 | { | |
5837 | struct tty_display_info *tty = t->display_info.tty; | |
3fc809e2 | 5838 | |
7cef7ce3 SM |
5839 | if (! tty->output) |
5840 | error ("Terminal is currently suspended"); | |
cecfdea6 | 5841 | |
7cef7ce3 SM |
5842 | if (tty->termscript) |
5843 | { | |
5844 | fwrite (SDATA (string), 1, SBYTES (string), tty->termscript); | |
5845 | fflush (tty->termscript); | |
5846 | } | |
5847 | out = tty->output; | |
4588ec20 | 5848 | } |
7cef7ce3 SM |
5849 | fwrite (SDATA (string), 1, SBYTES (string), out); |
5850 | fflush (out); | |
4d7e6e51 | 5851 | unblock_input (); |
4588ec20 JB |
5852 | return Qnil; |
5853 | } | |
5854 | ||
5f5c8ee5 | 5855 | |
a7ca3326 | 5856 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 5857 | doc: /* Beep, or flash the screen. |
228299fa | 5858 | Also, unless an argument is given, |
7ee72033 | 5859 | terminate any keyboard macro currently executing. */) |
5842a27b | 5860 | (Lisp_Object arg) |
4588ec20 | 5861 | { |
efb859b4 | 5862 | if (!NILP (arg)) |
4588ec20 | 5863 | { |
7fa788da RS |
5864 | if (noninteractive) |
5865 | putchar (07); | |
5866 | else | |
385ed61f | 5867 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5868 | } |
5869 | else | |
5870 | bitch_at_user (); | |
5871 | ||
5872 | return Qnil; | |
5873 | } | |
5874 | ||
dfcf069d | 5875 | void |
971de7fb | 5876 | bitch_at_user (void) |
4588ec20 JB |
5877 | { |
5878 | if (noninteractive) | |
5879 | putchar (07); | |
5f5c8ee5 | 5880 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
4588ec20 JB |
5881 | error ("Keyboard macro terminated by a command ringing the bell"); |
5882 | else | |
385ed61f | 5883 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5884 | } |
5885 | ||
5f5c8ee5 GM |
5886 | |
5887 | \f | |
5888 | /*********************************************************************** | |
5889 | Sleeping, Waiting | |
5890 | ***********************************************************************/ | |
5891 | ||
a7ca3326 | 5892 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 5893 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
5894 | SECONDS may be a floating-point value, meaning that you can wait for a |
5895 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
d35af63c | 5896 | additional wait period, in milliseconds; this is for backwards compatibility. |
7ee72033 | 5897 | \(Not all operating systems support waiting for a fraction of a second.) */) |
5842a27b | 5898 | (Lisp_Object seconds, Lisp_Object milliseconds) |
4588ec20 | 5899 | { |
d311d28c | 5900 | double duration = extract_float (seconds); |
4588ec20 | 5901 | |
d311d28c PE |
5902 | if (!NILP (milliseconds)) |
5903 | { | |
5904 | CHECK_NUMBER (milliseconds); | |
5905 | duration += XINT (milliseconds) / 1000.0; | |
5906 | } | |
b07646f5 | 5907 | |
d35af63c PE |
5908 | if (0 < duration) |
5909 | { | |
5910 | EMACS_TIME t = EMACS_TIME_FROM_DOUBLE (duration); | |
f1dd8073 | 5911 | wait_reading_process_output (min (EMACS_SECS (t), WAIT_READING_MAX), |
d35af63c PE |
5912 | EMACS_NSECS (t), 0, 0, Qnil, NULL, 0); |
5913 | } | |
4588ec20 JB |
5914 | |
5915 | return Qnil; | |
5916 | } | |
5917 | ||
5f5c8ee5 | 5918 | |
dcd1ca45 | 5919 | /* This is just like wait_reading_process_output, except that |
902b9b6d | 5920 | it does redisplay. |
f76475ad | 5921 | |
2bcac766 CY |
5922 | TIMEOUT is number of seconds to wait (float or integer), |
5923 | or t to wait forever. | |
59ea14cd | 5924 | READING is true if reading input. |
9fa1de30 PE |
5925 | If DISPLAY_OPTION is >0 display process output while waiting. |
5926 | If DISPLAY_OPTION is >1 perform an initial redisplay before waiting. | |
902b9b6d | 5927 | */ |
4588ec20 | 5928 | |
f76475ad | 5929 | Lisp_Object |
9fa1de30 | 5930 | sit_for (Lisp_Object timeout, bool reading, int display_option) |
f76475ad | 5931 | { |
d35af63c PE |
5932 | intmax_t sec; |
5933 | int nsec; | |
9fa1de30 | 5934 | bool do_display = display_option > 0; |
f222369e | 5935 | |
902b9b6d | 5936 | swallow_events (do_display); |
ccddf474 | 5937 | |
902b9b6d | 5938 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 5939 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 5940 | return Qnil; |
4588ec20 | 5941 | |
9fa1de30 | 5942 | if (display_option > 1) |
902b9b6d KS |
5943 | redisplay_preserve_echo_area (2); |
5944 | ||
d35af63c | 5945 | if (INTEGERP (timeout)) |
2bcac766 | 5946 | { |
d35af63c PE |
5947 | sec = XINT (timeout); |
5948 | if (! (0 < sec)) | |
5949 | return Qt; | |
5950 | nsec = 0; | |
2bcac766 | 5951 | } |
d35af63c | 5952 | else if (FLOATP (timeout)) |
d311d28c | 5953 | { |
d35af63c PE |
5954 | double seconds = XFLOAT_DATA (timeout); |
5955 | if (! (0 < seconds)) | |
d311d28c | 5956 | return Qt; |
d35af63c PE |
5957 | else |
5958 | { | |
5959 | EMACS_TIME t = EMACS_TIME_FROM_DOUBLE (seconds); | |
f1dd8073 | 5960 | sec = min (EMACS_SECS (t), WAIT_READING_MAX); |
d35af63c PE |
5961 | nsec = EMACS_NSECS (t); |
5962 | } | |
5963 | } | |
5964 | else if (EQ (timeout, Qt)) | |
5965 | { | |
5966 | sec = 0; | |
5967 | nsec = 0; | |
d311d28c | 5968 | } |
d35af63c PE |
5969 | else |
5970 | wrong_type_argument (Qnumberp, timeout); | |
5971 | ||
dfdb645c | 5972 | |
4a4bbad2 | 5973 | #ifdef USABLE_SIGIO |
f75beb47 | 5974 | gobble_input (); |
f76475ad JB |
5975 | #endif |
5976 | ||
d35af63c | 5977 | wait_reading_process_output (sec, nsec, reading ? -1 : 1, do_display, |
dcd1ca45 | 5978 | Qnil, NULL, 0); |
f76475ad | 5979 | |
4588ec20 JB |
5980 | return detect_input_pending () ? Qnil : Qt; |
5981 | } | |
5982 | ||
5f5c8ee5 | 5983 | |
a7ca3326 | 5984 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
025de85b CY |
5985 | doc: /* Perform redisplay. |
5986 | Optional arg FORCE, if non-nil, prevents redisplay from being | |
5987 | preempted by arriving input, even if `redisplay-dont-pause' is nil. | |
5988 | If `redisplay-dont-pause' is non-nil (the default), redisplay is never | |
5989 | preempted by arriving input, so FORCE does nothing. | |
5990 | ||
5991 | Return t if redisplay was performed, nil if redisplay was preempted | |
5992 | immediately by pending input. */) | |
5842a27b | 5993 | (Lisp_Object force) |
f76475ad | 5994 | { |
d311d28c | 5995 | ptrdiff_t count; |
659d9874 | 5996 | |
902b9b6d KS |
5997 | swallow_events (1); |
5998 | if ((detect_input_pending_run_timers (1) | |
01327edf | 5999 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
6000 | || !NILP (Vexecuting_kbd_macro)) |
6001 | return Qnil; | |
f76475ad | 6002 | |
01327edf KS |
6003 | count = SPECPDL_INDEX (); |
6004 | if (!NILP (force) && !redisplay_dont_pause) | |
6005 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 6006 | redisplay_preserve_echo_area (2); |
01327edf | 6007 | unbind_to (count, Qnil); |
7ba07a1a | 6008 | return Qt; |
f76475ad | 6009 | } |
5f5c8ee5 GM |
6010 | |
6011 | ||
6012 | \f | |
6013 | /*********************************************************************** | |
6014 | Other Lisp Functions | |
6015 | ***********************************************************************/ | |
6016 | ||
6017 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
6018 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 6019 | buffer-modified-flags. */ |
5f5c8ee5 GM |
6020 | |
6021 | static Lisp_Object frame_and_buffer_state; | |
6022 | ||
6023 | ||
6024 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 6025 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 6026 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
6027 | VARIABLE is a variable name whose value is either nil or a state vector |
6028 | that will be updated to contain all frames and buffers, | |
228299fa | 6029 | aside from buffers whose names start with space, |
44edd521 RS |
6030 | along with the buffers' read-only and modified flags. This allows a fast |
6031 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 6032 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
6033 | the current state. |
6034 | ||
6035 | If VARIABLE is nil, an internal variable is used. Users should not | |
6036 | pass nil for VARIABLE. */) | |
5842a27b | 6037 | (Lisp_Object variable) |
5f5c8ee5 | 6038 | { |
44edd521 | 6039 | Lisp_Object state, tail, frame, buf; |
086ca913 | 6040 | ptrdiff_t n, idx; |
5f5c8ee5 | 6041 | |
44edd521 RS |
6042 | if (! NILP (variable)) |
6043 | { | |
6044 | CHECK_SYMBOL (variable); | |
6045 | state = Fsymbol_value (variable); | |
6046 | if (! VECTORP (state)) | |
6047 | goto changed; | |
6048 | } | |
6049 | else | |
6050 | state = frame_and_buffer_state; | |
6051 | ||
086ca913 | 6052 | idx = 0; |
5f5c8ee5 GM |
6053 | FOR_EACH_FRAME (tail, frame) |
6054 | { | |
086ca913 | 6055 | if (idx == ASIZE (state)) |
44edd521 | 6056 | goto changed; |
086ca913 | 6057 | if (!EQ (AREF (state, idx++), frame)) |
5f5c8ee5 | 6058 | goto changed; |
086ca913 | 6059 | if (idx == ASIZE (state)) |
44edd521 | 6060 | goto changed; |
086ca913 | 6061 | if (!EQ (AREF (state, idx++), XFRAME (frame)->name)) |
5f5c8ee5 GM |
6062 | goto changed; |
6063 | } | |
44edd521 | 6064 | /* Check that the buffer info matches. */ |
7539e11f | 6065 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6066 | { |
7539e11f | 6067 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6068 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 6069 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 6070 | continue; |
086ca913 | 6071 | if (idx == ASIZE (state)) |
44edd521 | 6072 | goto changed; |
086ca913 | 6073 | if (!EQ (AREF (state, idx++), buf)) |
5f5c8ee5 | 6074 | goto changed; |
086ca913 | 6075 | if (idx == ASIZE (state)) |
44edd521 | 6076 | goto changed; |
086ca913 | 6077 | if (!EQ (AREF (state, idx++), BVAR (XBUFFER (buf), read_only))) |
5f5c8ee5 | 6078 | goto changed; |
086ca913 | 6079 | if (idx == ASIZE (state)) |
44edd521 | 6080 | goto changed; |
086ca913 | 6081 | if (!EQ (AREF (state, idx++), Fbuffer_modified_p (buf))) |
5f5c8ee5 GM |
6082 | goto changed; |
6083 | } | |
086ca913 | 6084 | if (idx == ASIZE (state)) |
44edd521 | 6085 | goto changed; |
5f5c8ee5 | 6086 | /* Detect deletion of a buffer at the end of the list. */ |
086ca913 | 6087 | if (EQ (AREF (state, idx), Qlambda)) |
5f5c8ee5 | 6088 | return Qnil; |
44edd521 RS |
6089 | |
6090 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 6091 | changed: |
44edd521 RS |
6092 | /* Count the size we will need. |
6093 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
6094 | n = 1; |
6095 | FOR_EACH_FRAME (tail, frame) | |
6096 | n += 2; | |
7539e11f | 6097 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6098 | n += 3; |
44edd521 RS |
6099 | /* Reallocate the vector if data has grown to need it, |
6100 | or if it has shrunk a lot. */ | |
6101 | if (! VECTORP (state) | |
77b37c05 PE |
6102 | || n > ASIZE (state) |
6103 | || n + 20 < ASIZE (state) / 2) | |
5f5c8ee5 | 6104 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
6105 | { |
6106 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
6107 | if (! NILP (variable)) | |
6108 | Fset (variable, state); | |
6109 | else | |
6110 | frame_and_buffer_state = state; | |
6111 | } | |
6112 | ||
6113 | /* Record the new data in the (possibly reallocated) vector. */ | |
086ca913 | 6114 | idx = 0; |
5f5c8ee5 GM |
6115 | FOR_EACH_FRAME (tail, frame) |
6116 | { | |
086ca913 DA |
6117 | ASET (state, idx, frame); |
6118 | idx++; | |
6119 | ASET (state, idx, XFRAME (frame)->name); | |
6120 | idx++; | |
5f5c8ee5 | 6121 | } |
7539e11f | 6122 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6123 | { |
7539e11f | 6124 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6125 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 6126 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 6127 | continue; |
086ca913 DA |
6128 | ASET (state, idx, buf); |
6129 | idx++; | |
6130 | ASET (state, idx, BVAR (XBUFFER (buf), read_only)); | |
6131 | idx++; | |
6132 | ASET (state, idx, Fbuffer_modified_p (buf)); | |
6133 | idx++; | |
5f5c8ee5 GM |
6134 | } |
6135 | /* Fill up the vector with lambdas (always at least one). */ | |
086ca913 DA |
6136 | ASET (state, idx, Qlambda); |
6137 | idx++; | |
6138 | while (idx < ASIZE (state)) | |
6139 | { | |
6140 | ASET (state, idx, Qlambda); | |
6141 | idx++; | |
6142 | } | |
5f5c8ee5 | 6143 | /* Make sure we didn't overflow the vector. */ |
086ca913 | 6144 | eassert (idx <= ASIZE (state)); |
5f5c8ee5 GM |
6145 | return Qt; |
6146 | } | |
6147 | ||
6148 | ||
4588ec20 | 6149 | \f |
5f5c8ee5 GM |
6150 | /*********************************************************************** |
6151 | Initialization | |
6152 | ***********************************************************************/ | |
6153 | ||
5f5c8ee5 GM |
6154 | /* Initialization done when Emacs fork is started, before doing stty. |
6155 | Determine terminal type and set terminal_driver. Then invoke its | |
6156 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 6157 | |
dfcf069d | 6158 | void |
971de7fb | 6159 | init_display (void) |
4588ec20 | 6160 | { |
28d440ab KL |
6161 | char *terminal_type; |
6162 | ||
5f5c8ee5 GM |
6163 | /* Construct the space glyph. */ |
6164 | space_glyph.type = CHAR_GLYPH; | |
3fc809e2 | 6165 | SET_CHAR_GLYPH (space_glyph, ' ', DEFAULT_FACE_ID, 0); |
5f5c8ee5 GM |
6166 | space_glyph.charpos = -1; |
6167 | ||
4588ec20 JB |
6168 | inverse_video = 0; |
6169 | cursor_in_echo_area = 0; | |
6170 | terminal_type = (char *) 0; | |
6171 | ||
1315c181 JB |
6172 | /* Now is the time to initialize this; it's used by init_sys_modes |
6173 | during startup. */ | |
2246281f | 6174 | Vinitial_window_system = Qnil; |
4588ec20 | 6175 | |
4181ad9c KL |
6176 | /* SIGWINCH needs to be handled no matter what display we start |
6177 | with. Otherwise newly opened tty frames will not resize | |
6178 | automatically. */ | |
6179 | #ifdef SIGWINCH | |
6180 | #ifndef CANNOT_DUMP | |
6181 | if (initialized) | |
6182 | #endif /* CANNOT_DUMP */ | |
2fe28299 PE |
6183 | { |
6184 | struct sigaction action; | |
6185 | emacs_sigaction_init (&action, deliver_window_change_signal); | |
6186 | sigaction (SIGWINCH, &action, 0); | |
6187 | } | |
4181ad9c | 6188 | #endif /* SIGWINCH */ |
4588ec20 | 6189 | |
d6ef42b9 | 6190 | /* If running as a daemon, no need to initialize any frames/terminal. */ |
ff808935 DN |
6191 | if (IS_DAEMON) |
6192 | return; | |
d6ef42b9 | 6193 | |
1315c181 JB |
6194 | /* If the user wants to use a window system, we shouldn't bother |
6195 | initializing the terminal. This is especially important when the | |
6196 | terminal is so dumb that emacs gives up before and doesn't bother | |
6197 | using the window system. | |
4588ec20 | 6198 | |
36bbad1d KH |
6199 | If the DISPLAY environment variable is set and nonempty, |
6200 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6201 | |
6202 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 6203 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 6204 | { |
36bbad1d | 6205 | char *display; |
36bbad1d | 6206 | display = getenv ("DISPLAY"); |
36bbad1d | 6207 | display_arg = (display != 0 && *display != 0); |
c1fc674b AS |
6208 | |
6209 | if (display_arg && !x_display_ok (display)) | |
6210 | { | |
6211 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
6212 | display); | |
6213 | inhibit_window_system = 1; | |
6214 | } | |
f040093a | 6215 | } |
d460af17 | 6216 | |
4fcc2638 | 6217 | if (!inhibit_window_system && display_arg) |
4588ec20 | 6218 | { |
111d9af3 | 6219 | Vinitial_window_system = Qx; |
4588ec20 JB |
6220 | #ifdef HAVE_X11 |
6221 | Vwindow_system_version = make_number (11); | |
039e5d71 | 6222 | #endif |
9311dcff | 6223 | #ifdef GNU_LINUX |
039e5d71 | 6224 | /* In some versions of ncurses, |
6a428f77 | 6225 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6226 | So call tgetent. */ |
6227 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 | 6228 | #endif |
5f5c8ee5 | 6229 | adjust_frame_glyphs_initially (); |
4588ec20 JB |
6230 | return; |
6231 | } | |
6232 | #endif /* HAVE_X_WINDOWS */ | |
6233 | ||
fd2e066a | 6234 | #ifdef HAVE_NTGUI |
177c0ea7 | 6235 | if (!inhibit_window_system) |
fd2e066a | 6236 | { |
111d9af3 | 6237 | Vinitial_window_system = Qw32; |
fd2e066a | 6238 | Vwindow_system_version = make_number (1); |
5f5c8ee5 | 6239 | adjust_frame_glyphs_initially (); |
fd2e066a GV |
6240 | return; |
6241 | } | |
6242 | #endif /* HAVE_NTGUI */ | |
6243 | ||
edfda783 AR |
6244 | #ifdef HAVE_NS |
6245 | if (!inhibit_window_system | |
6246 | #ifndef CANNOT_DUMP | |
6247 | && initialized | |
6248 | #endif | |
6249 | ) | |
6250 | { | |
111d9af3 | 6251 | Vinitial_window_system = Qns; |
5e617bc2 | 6252 | Vwindow_system_version = make_number (10); |
edfda783 AR |
6253 | adjust_frame_glyphs_initially (); |
6254 | return; | |
6255 | } | |
6256 | #endif | |
6257 | ||
4588ec20 JB |
6258 | /* If no window system has been specified, try to use the terminal. */ |
6259 | if (! isatty (0)) | |
6260 | { | |
1559a86d | 6261 | fatal ("standard input is not a tty"); |
4588ec20 JB |
6262 | exit (1); |
6263 | } | |
6264 | ||
6152361f JR |
6265 | #ifdef WINDOWSNT |
6266 | terminal_type = "w32console"; | |
6267 | #else | |
153a073c | 6268 | /* Look at the TERM variable. */ |
4588ec20 | 6269 | terminal_type = (char *) getenv ("TERM"); |
6152361f | 6270 | #endif |
4588ec20 JB |
6271 | if (!terminal_type) |
6272 | { | |
5d12ff0b | 6273 | #ifdef HAVE_WINDOW_SYSTEM |
b9e590fc RS |
6274 | if (! inhibit_window_system) |
6275 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6276 | else |
6277 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6278 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
4588ec20 JB |
6279 | exit (1); |
6280 | } | |
6281 | ||
0a125897 | 6282 | { |
6ed8eeff | 6283 | struct terminal *t; |
3224dac1 KL |
6284 | struct frame *f = XFRAME (selected_frame); |
6285 | ||
6286 | /* Open a display on the controlling tty. */ | |
6ed8eeff | 6287 | t = init_tty (0, terminal_type, 1); /* Errors are fatal. */ |
3224dac1 KL |
6288 | |
6289 | /* Convert the initial frame to use the new display. */ | |
b04f5ad2 | 6290 | if (f->output_method != output_initial) |
1088b922 | 6291 | emacs_abort (); |
6ed8eeff KL |
6292 | f->output_method = t->type; |
6293 | f->terminal = t; | |
3224dac1 | 6294 | |
6ed8eeff | 6295 | t->reference_count++; |
7ac5dac9 EZ |
6296 | #ifdef MSDOS |
6297 | f->output_data.tty->display_info = &the_only_display_info; | |
6298 | #else | |
6299 | if (f->output_method == output_termcap) | |
6300 | create_tty_output (f); | |
6301 | #endif | |
6ed8eeff | 6302 | t->display_info.tty->top_frame = selected_frame; |
5b65d888 | 6303 | change_frame_size (XFRAME (selected_frame), |
6ed8eeff KL |
6304 | FrameRows (t->display_info.tty), |
6305 | FrameCols (t->display_info.tty), 0, 0, 1); | |
3224dac1 | 6306 | |
6ed8eeff KL |
6307 | /* Delete the initial terminal. */ |
6308 | if (--initial_terminal->reference_count == 0 | |
6309 | && initial_terminal->delete_terminal_hook) | |
6310 | (*initial_terminal->delete_terminal_hook) (initial_terminal); | |
2666355c KL |
6311 | |
6312 | /* Update frame parameters to reflect the new type. */ | |
6313 | Fmodify_frame_parameters | |
6314 | (selected_frame, Fcons (Fcons (Qtty_type, | |
6ed8eeff | 6315 | Ftty_type (selected_frame)), Qnil)); |
657ceaa0 EZ |
6316 | if (t->display_info.tty->name) |
6317 | Fmodify_frame_parameters (selected_frame, | |
6318 | Fcons (Fcons (Qtty, build_string (t->display_info.tty->name)), | |
6319 | Qnil)); | |
6320 | else | |
6321 | Fmodify_frame_parameters (selected_frame, Fcons (Fcons (Qtty, Qnil), | |
6322 | Qnil)); | |
0a125897 | 6323 | } |
3fc809e2 | 6324 | |
d86c299a | 6325 | { |
91fb7e1b | 6326 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6327 | int width = FRAME_TOTAL_COLS (sf); |
6328 | int height = FRAME_LINES (sf); | |
d86c299a | 6329 | |
5f5c8ee5 | 6330 | /* If these sizes are so big they cause overflow, just ignore the |
dfd153ae PE |
6331 | change. It's not clear what better we could do. The rest of |
6332 | the code assumes that (width + 2) * height * sizeof (struct glyph) | |
6333 | does not overflow and does not exceed PTRDIFF_MAX or SIZE_MAX. */ | |
e3c25c68 PE |
6334 | if (INT_ADD_RANGE_OVERFLOW (width, 2, INT_MIN, INT_MAX) |
6335 | || INT_MULTIPLY_RANGE_OVERFLOW (width + 2, height, INT_MIN, INT_MAX) | |
dfd153ae PE |
6336 | || (min (PTRDIFF_MAX, SIZE_MAX) / sizeof (struct glyph) |
6337 | < (width + 2) * height)) | |
1559a86d | 6338 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6339 | } |
6340 | ||
5f5c8ee5 | 6341 | adjust_frame_glyphs_initially (); |
91fb7e1b | 6342 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6343 | |
5f5c8ee5 GM |
6344 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ |
6345 | if (initialized | |
6346 | && !noninteractive | |
2246281f | 6347 | && NILP (Vinitial_window_system)) |
2d764c78 EZ |
6348 | { |
6349 | /* For the initial frame, we don't have any way of knowing what | |
6350 | are the foreground and background colors of the terminal. */ | |
5e617bc2 | 6351 | struct frame *sf = SELECTED_FRAME (); |
2d764c78 | 6352 | |
f9d2fdc4 EZ |
6353 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
6354 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
6355 | call0 (intern ("tty-set-up-initial-frame-faces")); |
6356 | } | |
5f5c8ee5 GM |
6357 | } |
6358 | ||
6359 | ||
6360 | \f | |
6361 | /*********************************************************************** | |
6362 | Blinking cursor | |
6363 | ***********************************************************************/ | |
6364 | ||
c3f13540 | 6365 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 6366 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 6367 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
6368 | WINDOW nil means use the selected window. SHOW non-nil means |
6369 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 | 6370 | don't show a cursor. */) |
5842a27b | 6371 | (Lisp_Object window, Lisp_Object show) |
5f5c8ee5 | 6372 | { |
5f5c8ee5 GM |
6373 | /* Don't change cursor state while redisplaying. This could confuse |
6374 | output routines. */ | |
6375 | if (!redisplaying_p) | |
6376 | { | |
6377 | if (NILP (window)) | |
6378 | window = selected_window; | |
6379 | else | |
b7826503 | 6380 | CHECK_WINDOW (window); |
177c0ea7 | 6381 | |
5d7791b3 | 6382 | XWINDOW (window)->cursor_off_p = NILP (show); |
5f5c8ee5 GM |
6383 | } |
6384 | ||
6385 | return Qnil; | |
4588ec20 | 6386 | } |
5f5c8ee5 GM |
6387 | |
6388 | ||
5d7791b3 GM |
6389 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
6390 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 6391 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 | 6392 | WINDOW nil or omitted means report on the selected window. */) |
5842a27b | 6393 | (Lisp_Object window) |
5d7791b3 GM |
6394 | { |
6395 | struct window *w; | |
177c0ea7 | 6396 | |
5d7791b3 GM |
6397 | if (NILP (window)) |
6398 | window = selected_window; | |
6399 | else | |
b7826503 | 6400 | CHECK_WINDOW (window); |
177c0ea7 | 6401 | |
5d7791b3 | 6402 | w = XWINDOW (window); |
177c0ea7 | 6403 | return w->cursor_off_p ? Qnil : Qt; |
5d7791b3 GM |
6404 | } |
6405 | ||
87478b52 SM |
6406 | DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame, |
6407 | Slast_nonminibuf_frame, 0, 0, 0, | |
6408 | doc: /* Value is last nonminibuffer frame. */) | |
5842a27b | 6409 | (void) |
87478b52 | 6410 | { |
4958ed94 | 6411 | Lisp_Object frame = Qnil; |
87478b52 | 6412 | |
4958ed94 SM |
6413 | if (last_nonminibuf_frame) |
6414 | XSETFRAME (frame, last_nonminibuf_frame); | |
87478b52 SM |
6415 | |
6416 | return frame; | |
6417 | } | |
4588ec20 | 6418 | \f |
5f5c8ee5 GM |
6419 | /*********************************************************************** |
6420 | Initialization | |
6421 | ***********************************************************************/ | |
6422 | ||
dfcf069d | 6423 | void |
971de7fb | 6424 | syms_of_display (void) |
4588ec20 | 6425 | { |
502b9b64 | 6426 | defsubr (&Sredraw_frame); |
4588ec20 | 6427 | defsubr (&Sredraw_display); |
078b3696 | 6428 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
6429 | defsubr (&Sopen_termscript); |
6430 | defsubr (&Sding); | |
7ba07a1a | 6431 | defsubr (&Sredisplay); |
4588ec20 JB |
6432 | defsubr (&Ssleep_for); |
6433 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 6434 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 6435 | defsubr (&Sinternal_show_cursor_p); |
87478b52 | 6436 | defsubr (&Slast_nonminibuf_frame); |
4588ec20 | 6437 | |
e509cfa6 | 6438 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
6439 | defsubr (&Sdump_redisplay_history); |
6440 | #endif | |
6441 | ||
d1dad759 | 6442 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
6443 | staticpro (&frame_and_buffer_state); |
6444 | ||
cd3520a4 JB |
6445 | DEFSYM (Qdisplay_table, "display-table"); |
6446 | DEFSYM (Qredisplay_dont_pause, "redisplay-dont-pause"); | |
9cda4f7c | 6447 | |
29208e82 | 6448 | DEFVAR_INT ("baud-rate", baud_rate, |
025de85b | 6449 | doc: /* The output baud rate of the terminal. |
228299fa GM |
6450 | On most systems, changing this value will affect the amount of padding |
6451 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 6452 | |
29208e82 | 6453 | DEFVAR_BOOL ("inverse-video", inverse_video, |
025de85b | 6454 | doc: /* Non-nil means invert the entire frame display. |
228299fa | 6455 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 6456 | |
29208e82 | 6457 | DEFVAR_BOOL ("visible-bell", visible_bell, |
025de85b | 6458 | doc: /* Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
6459 | |
6460 | See also `ring-bell-function'. */); | |
177c0ea7 | 6461 | |
29208e82 | 6462 | DEFVAR_BOOL ("no-redraw-on-reenter", no_redraw_on_reenter, |
025de85b | 6463 | doc: /* Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
6464 | A non-nil value is useful if the terminal can automatically preserve |
6465 | Emacs's frame display when you reenter Emacs. | |
6466 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 6467 | |
29208e82 | 6468 | DEFVAR_LISP ("initial-window-system", Vinitial_window_system, |
2246281f | 6469 | doc: /* Name of the window system that Emacs uses for the first frame. |
89baa1df EZ |
6470 | The value is a symbol: |
6471 | nil for a termcap frame (a character-only terminal), | |
6472 | 'x' for an Emacs frame that is really an X window, | |
6473 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6474 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6475 | 'pc' for a direct-write MS-DOS frame. | |
6476 | ||
6477 | Use of this variable as a boolean is deprecated. Instead, | |
6478 | use `display-graphic-p' or any of the other `display-*-p' | |
6479 | predicates which report frame's specific UI-related capabilities. */); | |
177c0ea7 | 6480 | |
70b8d0a4 SM |
6481 | DEFVAR_KBOARD ("window-system", Vwindow_system, |
6482 | doc: /* Name of window system through which the selected frame is displayed. | |
89baa1df EZ |
6483 | The value is a symbol: |
6484 | nil for a termcap frame (a character-only terminal), | |
6485 | 'x' for an Emacs frame that is really an X window, | |
6486 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6487 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6488 | 'pc' for a direct-write MS-DOS frame. | |
6489 | ||
6490 | Use of this variable as a boolean is deprecated. Instead, | |
6491 | use `display-graphic-p' or any of the other `display-*-p' | |
6492 | predicates which report frame's specific UI-related capabilities. */); | |
70b8d0a4 | 6493 | |
29208e82 | 6494 | DEFVAR_LISP ("window-system-version", Vwindow_system_version, |
bacf09b4 | 6495 | doc: /* The version number of the window system in use. |
c22140f6 | 6496 | For X windows, this is 11. */); |
177c0ea7 | 6497 | |
29208e82 | 6498 | DEFVAR_BOOL ("cursor-in-echo-area", cursor_in_echo_area, |
bacf09b4 | 6499 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 6500 | |
29208e82 | 6501 | DEFVAR_LISP ("glyph-table", Vglyph_table, |
bacf09b4 | 6502 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
6503 | If not nil, this is a vector indexed by glyph code to define the glyph. |
6504 | Each element can be: | |
6505 | integer: a glyph code which this glyph is an alias for. | |
6506 | string: output this glyph using that string (not impl. in X windows). | |
6507 | nil: this glyph mod 524288 is the code of a character to output, | |
6508 | and this glyph / 524288 is the face number (see `face-id') to use | |
6509 | while outputting it. */); | |
4588ec20 JB |
6510 | Vglyph_table = Qnil; |
6511 | ||
29208e82 | 6512 | DEFVAR_LISP ("standard-display-table", Vstandard_display_table, |
bacf09b4 | 6513 | doc: /* Display table to use for buffers that specify none. |
228299fa | 6514 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
6515 | Vstandard_display_table = Qnil; |
6516 | ||
29208e82 | 6517 | DEFVAR_BOOL ("redisplay-dont-pause", redisplay_dont_pause, |
025de85b | 6518 | doc: /* Non-nil means display update isn't paused when input is detected. */); |
6bf7006f | 6519 | redisplay_dont_pause = 1; |
5f5c8ee5 | 6520 | |
d012c62b | 6521 | #if PERIODIC_PREEMPTION_CHECKING |
29208e82 | 6522 | DEFVAR_LISP ("redisplay-preemption-period", Vredisplay_preemption_period, |
025de85b CY |
6523 | doc: /* Period in seconds between checking for input during redisplay. |
6524 | This has an effect only if `redisplay-dont-pause' is nil; in that | |
6525 | case, arriving input preempts redisplay until the input is processed. | |
6526 | If the value is nil, redisplay is never preempted. */); | |
d012c62b KS |
6527 | Vredisplay_preemption_period = make_float (0.10); |
6528 | #endif | |
6529 | ||
4588ec20 JB |
6530 | #ifdef CANNOT_DUMP |
6531 | if (noninteractive) | |
6532 | #endif | |
6533 | { | |
2246281f | 6534 | Vinitial_window_system = Qnil; |
4588ec20 JB |
6535 | Vwindow_system_version = Qnil; |
6536 | } | |
6537 | } |