Commit | Line | Data |
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4588ec20 | 1 | /* Updating of data structures for redisplay. |
9311dcff | 2 | |
ab422c4d PE |
3 | Copyright (C) 1985-1988, 1993-1995, 1997-2013 Free Software Foundation, |
4 | Inc. | |
4588ec20 JB |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
9ec0b715 | 8 | GNU Emacs is free software: you can redistribute it and/or modify |
4588ec20 | 9 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
10 | the Free Software Foundation, either version 3 of the License, or |
11 | (at your option) any later version. | |
4588ec20 JB |
12 | |
13 | GNU Emacs is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
4588ec20 | 20 | |
18160b98 | 21 | #include <config.h> |
f162bcc3 PE |
22 | |
23 | #define DISPEXTERN_INLINE EXTERN_INLINE | |
24 | ||
565620a5 | 25 | #include <stdio.h> |
dfcf069d | 26 | #include <unistd.h> |
dfcf069d | 27 | |
47099d6f | 28 | #include "lisp.h" |
4588ec20 | 29 | #include "termchar.h" |
a0879520 | 30 | /* cm.h must come after dispextern.h on Windows. */ |
fd2e066a GV |
31 | #include "dispextern.h" |
32 | #include "cm.h" | |
83be827a | 33 | #include "character.h" |
e5560ff7 | 34 | #include "buffer.h" |
d43721a2 | 35 | #include "keyboard.h" |
502b9b64 | 36 | #include "frame.h" |
428a555e | 37 | #include "termhooks.h" |
4588ec20 JB |
38 | #include "window.h" |
39 | #include "commands.h" | |
40 | #include "disptab.h" | |
41 | #include "indent.h" | |
d169fe39 | 42 | #include "intervals.h" |
97cf50e7 | 43 | #include "blockinput.h" |
dfcf069d | 44 | #include "process.h" |
4588ec20 | 45 | |
58b2bb63 | 46 | #include "syssignal.h" |
a41f8bed | 47 | |
17a2cbbd DC |
48 | #ifdef HAVE_WINDOW_SYSTEM |
49 | #include TERM_HEADER | |
50 | #endif /* HAVE_WINDOW_SYSTEM */ | |
edfda783 | 51 | |
5f5c8ee5 | 52 | /* Include systime.h after xterm.h to avoid double inclusion of time.h. */ |
6cbd1643 | 53 | |
5f5c8ee5 | 54 | #include "systime.h" |
3883a901 RS |
55 | #include <errno.h> |
56 | ||
8148369c | 57 | #include <fpending.h> |
c59592b3 | 58 | |
9311dcff | 59 | #if defined (HAVE_TERM_H) && defined (GNU_LINUX) |
fa0ec9f4 DL |
60 | #include <term.h> /* for tgetent */ |
61 | #endif | |
a68089e4 EZ |
62 | |
63 | #ifdef WINDOWSNT | |
64 | #include "w32.h" | |
65 | #endif | |
5f5c8ee5 GM |
66 | \f |
67 | /* Structure to pass dimensions around. Used for character bounding | |
68 | boxes, glyph matrix dimensions and alike. */ | |
69 | ||
70 | struct dim | |
71 | { | |
72 | int width; | |
73 | int height; | |
74 | }; | |
75 | ||
76 | \f | |
77 | /* Function prototypes. */ | |
78 | ||
f57e2426 | 79 | static void update_frame_line (struct frame *, int); |
2f7c71a1 AS |
80 | static int required_matrix_height (struct window *); |
81 | static int required_matrix_width (struct window *); | |
f57e2426 | 82 | static void adjust_frame_glyphs (struct frame *); |
59ea14cd | 83 | static void change_frame_size_1 (struct frame *, int, int, bool, bool, bool); |
d311d28c | 84 | static void increment_row_positions (struct glyph_row *, ptrdiff_t, ptrdiff_t); |
f57e2426 J |
85 | static void fill_up_frame_row_with_spaces (struct glyph_row *, int); |
86 | static void build_frame_matrix_from_window_tree (struct glyph_matrix *, | |
87 | struct window *); | |
88 | static void build_frame_matrix_from_leaf_window (struct glyph_matrix *, | |
89 | struct window *); | |
f57e2426 J |
90 | static void adjust_frame_message_buffer (struct frame *); |
91 | static void adjust_decode_mode_spec_buffer (struct frame *); | |
92 | static void fill_up_glyph_row_with_spaces (struct glyph_row *); | |
59ea14cd | 93 | static void clear_window_matrices (struct window *, bool); |
f57e2426 | 94 | static void fill_up_glyph_row_area_with_spaces (struct glyph_row *, int); |
59ea14cd PE |
95 | static int scrolling_window (struct window *, bool); |
96 | static bool update_window_line (struct window *, int, bool *); | |
f57e2426 | 97 | static void mirror_make_current (struct window *, int); |
e509cfa6 | 98 | #ifdef GLYPH_DEBUG |
f57e2426 J |
99 | static void check_matrix_pointers (struct glyph_matrix *, |
100 | struct glyph_matrix *); | |
b96fd3e8 | 101 | #endif |
f57e2426 | 102 | static void mirror_line_dance (struct window *, int, int, int *, char *); |
59ea14cd PE |
103 | static bool update_window_tree (struct window *, bool); |
104 | static bool update_window (struct window *, bool); | |
105 | static bool update_frame_1 (struct frame *, bool, bool); | |
106 | static bool scrolling (struct frame *); | |
f57e2426 | 107 | static void set_window_cursor_after_update (struct window *); |
f57e2426 J |
108 | static void adjust_frame_glyphs_for_window_redisplay (struct frame *); |
109 | static void adjust_frame_glyphs_for_frame_redisplay (struct frame *); | |
5f5c8ee5 | 110 | |
5f5c8ee5 | 111 | \f |
d012c62b KS |
112 | /* Redisplay preemption timers. */ |
113 | ||
114 | static EMACS_TIME preemption_period; | |
115 | static EMACS_TIME preemption_next_check; | |
116 | ||
59ea14cd | 117 | /* True upon entry to redisplay means do not assume anything about |
502b9b64 | 118 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 119 | |
59ea14cd | 120 | bool frame_garbaged; |
4588ec20 | 121 | |
59ea14cd | 122 | /* True means last display completed. False means it was preempted. */ |
4588ec20 | 123 | |
59ea14cd | 124 | bool display_completed; |
4588ec20 | 125 | |
e7067d00 | 126 | Lisp_Object Qdisplay_table, Qredisplay_dont_pause; |
5f5c8ee5 | 127 | |
4588ec20 | 128 | \f |
5f5c8ee5 | 129 | /* The currently selected frame. In a single-frame version, this |
91fb7e1b | 130 | variable always equals the_only_frame. */ |
4588ec20 | 131 | |
91fb7e1b | 132 | Lisp_Object selected_frame; |
4588ec20 | 133 | |
5f5c8ee5 | 134 | /* A frame which is not just a mini-buffer, or 0 if there are no such |
502b9b64 | 135 | frames. This is usually the most recent such frame that was |
87485d6f MW |
136 | selected. In a single-frame version, this variable always holds |
137 | the address of the_only_frame. */ | |
4588ec20 | 138 | |
5f5c8ee5 | 139 | struct frame *last_nonminibuf_frame; |
d52bad65 | 140 | |
59ea14cd | 141 | /* True means SIGWINCH happened when not safe. */ |
4588ec20 | 142 | |
59ea14cd | 143 | static bool delayed_size_change; |
4588ec20 | 144 | |
5f5c8ee5 | 145 | /* Updated window if != 0. Set by update_window. */ |
4588ec20 | 146 | |
5f5c8ee5 | 147 | struct window *updated_window; |
4588ec20 | 148 | |
5f5c8ee5 | 149 | /* Glyph row updated in update_window_line, and area that is updated. */ |
4588ec20 | 150 | |
5f5c8ee5 GM |
151 | struct glyph_row *updated_row; |
152 | int updated_area; | |
4588ec20 | 153 | |
5f5c8ee5 | 154 | /* A glyph for a space. */ |
4588ec20 | 155 | |
5f5c8ee5 | 156 | struct glyph space_glyph; |
4588ec20 | 157 | |
5f5c8ee5 GM |
158 | /* Counts of allocated structures. These counts serve to diagnose |
159 | memory leaks and double frees. */ | |
4588ec20 | 160 | |
5bf46f05 PE |
161 | static int glyph_matrix_count; |
162 | static int glyph_pool_count; | |
4588ec20 | 163 | |
5f5c8ee5 GM |
164 | /* If non-null, the frame whose frame matrices are manipulated. If |
165 | null, window matrices are worked on. */ | |
4588ec20 | 166 | |
5f5c8ee5 | 167 | static struct frame *frame_matrix_frame; |
4588ec20 | 168 | |
59ea14cd | 169 | /* True means that fonts have been loaded since the last glyph |
5f5c8ee5 | 170 | matrix adjustments. Redisplay must stop, and glyph matrices must |
59ea14cd | 171 | be adjusted when this flag becomes true during display. The |
5f5c8ee5 | 172 | reason fonts can be loaded so late is that fonts of fontsets are |
3aa9f0c4 KH |
173 | loaded on demand. Another reason is that a line contains many |
174 | characters displayed by zero width or very narrow glyphs of | |
175 | variable-width fonts. */ | |
836d2cde | 176 | |
59ea14cd | 177 | bool fonts_changed_p; |
836d2cde | 178 | |
177c0ea7 | 179 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 180 | This may only be used for terminal frames. */ |
836d2cde | 181 | |
e509cfa6 | 182 | #ifdef GLYPH_DEBUG |
4588ec20 | 183 | |
f57e2426 J |
184 | static int window_to_frame_vpos (struct window *, int); |
185 | static int window_to_frame_hpos (struct window *, int); | |
5f5c8ee5 GM |
186 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) |
187 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 188 | |
9b0e97aa GM |
189 | /* One element of the ring buffer containing redisplay history |
190 | information. */ | |
191 | ||
192 | struct redisplay_history | |
193 | { | |
194 | char trace[512 + 100]; | |
195 | }; | |
196 | ||
197 | /* The size of the history buffer. */ | |
198 | ||
199 | #define REDISPLAY_HISTORY_SIZE 30 | |
200 | ||
201 | /* The redisplay history buffer. */ | |
202 | ||
203 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
204 | ||
205 | /* Next free entry in redisplay_history. */ | |
206 | ||
207 | static int history_idx; | |
208 | ||
209 | /* A tick that's incremented each time something is added to the | |
210 | history. */ | |
211 | ||
dfd153ae | 212 | static uprintmax_t history_tick; |
6a8aec41 | 213 | \f |
9b0e97aa GM |
214 | /* Add to the redisplay history how window W has been displayed. |
215 | MSG is a trace containing the information how W's glyph matrix | |
59ea14cd | 216 | has been constructed. PAUSED_P means that the update |
9b0e97aa GM |
217 | has been interrupted for pending input. */ |
218 | ||
219 | static void | |
59ea14cd | 220 | add_window_display_history (struct window *w, const char *msg, bool paused_p) |
9b0e97aa GM |
221 | { |
222 | char *buf; | |
177c0ea7 | 223 | |
9b0e97aa GM |
224 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
225 | history_idx = 0; | |
226 | buf = redisplay_history[history_idx].trace; | |
227 | ++history_idx; | |
177c0ea7 | 228 | |
8666506e PE |
229 | snprintf (buf, sizeof redisplay_history[0].trace, |
230 | "%"pMu": window %p (`%s')%s\n%s", | |
231 | history_tick++, | |
232 | w, | |
d3d50620 DA |
233 | ((BUFFERP (w->buffer) |
234 | && STRINGP (BVAR (XBUFFER (w->buffer), name))) | |
235 | ? SSDATA (BVAR (XBUFFER (w->buffer), name)) | |
8666506e PE |
236 | : "???"), |
237 | paused_p ? " ***paused***" : "", | |
238 | msg); | |
9b0e97aa GM |
239 | } |
240 | ||
241 | ||
242 | /* Add to the redisplay history that frame F has been displayed. | |
59ea14cd | 243 | PAUSED_P means that the update has been interrupted for |
9b0e97aa GM |
244 | pending input. */ |
245 | ||
246 | static void | |
59ea14cd | 247 | add_frame_display_history (struct frame *f, bool paused_p) |
9b0e97aa GM |
248 | { |
249 | char *buf; | |
177c0ea7 | 250 | |
9b0e97aa GM |
251 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
252 | history_idx = 0; | |
253 | buf = redisplay_history[history_idx].trace; | |
254 | ++history_idx; | |
177c0ea7 | 255 | |
dfd153ae | 256 | sprintf (buf, "%"pMu": update frame %p%s", |
9b0e97aa GM |
257 | history_tick++, |
258 | f, paused_p ? " ***paused***" : ""); | |
259 | } | |
260 | ||
261 | ||
a7ca3326 | 262 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, |
9b0e97aa | 263 | Sdump_redisplay_history, 0, 0, "", |
7ee72033 | 264 | doc: /* Dump redisplay history to stderr. */) |
5842a27b | 265 | (void) |
9b0e97aa GM |
266 | { |
267 | int i; | |
268 | ||
269 | for (i = history_idx - 1; i != history_idx; --i) | |
270 | { | |
271 | if (i < 0) | |
272 | i = REDISPLAY_HISTORY_SIZE - 1; | |
273 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
274 | } | |
275 | ||
276 | return Qnil; | |
277 | } | |
278 | ||
279 | ||
e509cfa6 | 280 | #else /* not GLYPH_DEBUG */ |
4588ec20 | 281 | |
7df02016 KS |
282 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
283 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 284 | |
e509cfa6 | 285 | #endif /* GLYPH_DEBUG */ |
4588ec20 | 286 | |
4588ec20 | 287 | |
9e4bf381 PE |
288 | #if (defined PROFILING \ |
289 | && (defined __FreeBSD__ || defined GNU_LINUX || defined __MINGW32__) \ | |
290 | && !HAVE___EXECUTABLE_START) | |
291 | /* This function comes first in the Emacs executable and is used only | |
292 | to estimate the text start for profiling. */ | |
4588ec20 | 293 | void |
9e4bf381 | 294 | __executable_start (void) |
4588ec20 | 295 | { |
1088b922 | 296 | emacs_abort (); |
177c0ea7 | 297 | } |
72af86bd | 298 | #endif |
5f5c8ee5 GM |
299 | \f |
300 | /*********************************************************************** | |
301 | Glyph Matrices | |
302 | ***********************************************************************/ | |
303 | ||
304 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
305 | pool from which memory for the matrix should be allocated, or null | |
306 | for window-based redisplay where no glyph pools are used. The | |
307 | member `pool' of the glyph matrix structure returned is set to | |
308 | POOL, the structure is otherwise zeroed. */ | |
309 | ||
5bf46f05 | 310 | static struct glyph_matrix * |
971de7fb | 311 | new_glyph_matrix (struct glyph_pool *pool) |
4588ec20 | 312 | { |
23f86fce | 313 | struct glyph_matrix *result = xzalloc (sizeof *result); |
4588ec20 | 314 | |
5f5c8ee5 GM |
315 | /* Increment number of allocated matrices. This count is used |
316 | to detect memory leaks. */ | |
317 | ++glyph_matrix_count; | |
4588ec20 | 318 | |
5f5c8ee5 GM |
319 | /* Set pool and return. */ |
320 | result->pool = pool; | |
321 | return result; | |
4588ec20 JB |
322 | } |
323 | ||
4588ec20 | 324 | |
5f5c8ee5 GM |
325 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
326 | ||
327 | The global counter glyph_matrix_count is decremented when a matrix | |
328 | is freed. If the count gets negative, more structures were freed | |
329 | than allocated, i.e. one matrix was freed more than once or a bogus | |
330 | pointer was passed to this function. | |
177c0ea7 | 331 | |
5f5c8ee5 GM |
332 | If MATRIX->pool is null, this means that the matrix manages its own |
333 | glyph memory---this is done for matrices on X frames. Freeing the | |
334 | matrix also frees the glyph memory in this case. */ | |
335 | ||
336 | static void | |
971de7fb | 337 | free_glyph_matrix (struct glyph_matrix *matrix) |
4588ec20 | 338 | { |
5f5c8ee5 GM |
339 | if (matrix) |
340 | { | |
341 | int i; | |
342 | ||
343 | /* Detect the case that more matrices are freed than were | |
344 | allocated. */ | |
345 | if (--glyph_matrix_count < 0) | |
1088b922 | 346 | emacs_abort (); |
5f5c8ee5 GM |
347 | |
348 | /* Free glyph memory if MATRIX owns it. */ | |
349 | if (matrix->pool == NULL) | |
350 | for (i = 0; i < matrix->rows_allocated; ++i) | |
351 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 352 | |
5f5c8ee5 GM |
353 | /* Free row structures and the matrix itself. */ |
354 | xfree (matrix->rows); | |
355 | xfree (matrix); | |
356 | } | |
357 | } | |
4588ec20 | 358 | |
4588ec20 | 359 | |
5f5c8ee5 GM |
360 | /* Return the number of glyphs to reserve for a marginal area of |
361 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
362 | display line of window W. MARGIN gives the width of the marginal | |
363 | area in canonical character units. MARGIN should be an integer | |
364 | or a float. */ | |
365 | ||
366 | static int | |
971de7fb | 367 | margin_glyphs_to_reserve (struct window *w, int total_glyphs, Lisp_Object margin) |
5f5c8ee5 GM |
368 | { |
369 | int n; | |
4588ec20 | 370 | |
5f5c8ee5 | 371 | if (NUMBERP (margin)) |
4588ec20 | 372 | { |
d3d50620 | 373 | int width = XFASTINT (w->total_cols); |
5f5c8ee5 GM |
374 | double d = max (0, XFLOATINT (margin)); |
375 | d = min (width / 2 - 1, d); | |
35ec832e | 376 | n = (int) ((double) total_glyphs / width * d); |
5f5c8ee5 GM |
377 | } |
378 | else | |
379 | n = 0; | |
380 | ||
381 | return n; | |
382 | } | |
383 | ||
59ea14cd | 384 | /* Return true if ROW's hash value is correct. |
e509cfa6 DA |
385 | Optimized away if ENABLE_CHECKING is not defined. */ |
386 | ||
59ea14cd | 387 | static bool |
7a7270dd EZ |
388 | verify_row_hash (struct glyph_row *row) |
389 | { | |
015137db | 390 | return row->hash == row_hash (row); |
7a7270dd | 391 | } |
4588ec20 | 392 | |
5f5c8ee5 GM |
393 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
394 | window sizes. | |
4588ec20 | 395 | |
5f5c8ee5 GM |
396 | W is null if the function is called for a frame glyph matrix. |
397 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
398 | indices of the first column and row of MATRIX within the frame | |
399 | matrix, if such a matrix exists. They are zero for purely | |
400 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 401 | |
5f5c8ee5 GM |
402 | In window-based redisplay, where no frame matrices exist, glyph |
403 | matrices manage their own glyph storage. Otherwise, they allocate | |
404 | storage from a common frame glyph pool which can be found in | |
405 | MATRIX->pool. | |
23b0200c | 406 | |
5f5c8ee5 GM |
407 | The reason for this memory management strategy is to avoid complete |
408 | frame redraws if possible. When we allocate from a common pool, a | |
409 | change of the location or size of a sub-matrix within the pool | |
410 | requires a complete redisplay of the frame because we cannot easily | |
411 | make sure that the current matrices of all windows still agree with | |
412 | what is displayed on the screen. While this is usually fast, it | |
413 | leads to screen flickering. */ | |
23b0200c | 414 | |
5f5c8ee5 | 415 | static void |
971de7fb | 416 | adjust_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int x, int y, struct dim dim) |
5f5c8ee5 GM |
417 | { |
418 | int i; | |
419 | int new_rows; | |
59ea14cd PE |
420 | bool marginal_areas_changed_p = 0; |
421 | bool header_line_changed_p = 0; | |
422 | bool header_line_p = 0; | |
5f5c8ee5 | 423 | int left = -1, right = -1; |
ca8a12a7 | 424 | int window_width = -1, window_height = -1; |
5f5c8ee5 | 425 | |
6b61353c KH |
426 | /* See if W had a header line that has disappeared now, or vice versa. |
427 | Get W's size. */ | |
5f5c8ee5 GM |
428 | if (w) |
429 | { | |
6b61353c KH |
430 | window_box (w, -1, 0, 0, &window_width, &window_height); |
431 | ||
045dee35 GM |
432 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
433 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 434 | } |
045dee35 | 435 | matrix->header_line_p = header_line_p; |
23b0200c | 436 | |
6b61353c KH |
437 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
438 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
439 | haven't changed. This optimization is important because preserving |
440 | the matrix means preventing redisplay. */ | |
441 | if (matrix->pool == NULL) | |
442 | { | |
d3d50620 DA |
443 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
444 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
a54e2c05 | 445 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
446 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs |
447 | || right != matrix->right_margin_glyphs); | |
448 | ||
449 | if (!marginal_areas_changed_p | |
450 | && !fonts_changed_p | |
045dee35 | 451 | && !header_line_changed_p |
7df02016 KS |
452 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
453 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
454 | && matrix->window_height == window_height |
455 | && matrix->window_vscroll == w->vscroll | |
456 | && matrix->window_width == window_width) | |
457 | return; | |
458 | } | |
177c0ea7 | 459 | |
5f5c8ee5 GM |
460 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
461 | if (matrix->rows_allocated < dim.height) | |
462 | { | |
0065d054 | 463 | int old_alloc = matrix->rows_allocated; |
5f5c8ee5 | 464 | new_rows = dim.height - matrix->rows_allocated; |
0065d054 PE |
465 | matrix->rows = xpalloc (matrix->rows, &matrix->rows_allocated, |
466 | new_rows, INT_MAX, sizeof *matrix->rows); | |
467 | memset (matrix->rows + old_alloc, 0, | |
468 | (matrix->rows_allocated - old_alloc) * sizeof *matrix->rows); | |
5f5c8ee5 GM |
469 | } |
470 | else | |
471 | new_rows = 0; | |
60a8948a | 472 | |
5f5c8ee5 GM |
473 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
474 | on a frame not using window-based redisplay. Set up pointers for | |
475 | each row into the glyph pool. */ | |
476 | if (matrix->pool) | |
477 | { | |
a54e2c05 | 478 | eassert (matrix->pool->glyphs); |
177c0ea7 | 479 | |
5f5c8ee5 | 480 | if (w) |
60a8948a | 481 | { |
5f5c8ee5 | 482 | left = margin_glyphs_to_reserve (w, dim.width, |
d3d50620 | 483 | w->left_margin_cols); |
5f5c8ee5 | 484 | right = margin_glyphs_to_reserve (w, dim.width, |
d3d50620 | 485 | w->right_margin_cols); |
60a8948a | 486 | } |
5f5c8ee5 GM |
487 | else |
488 | left = right = 0; | |
177c0ea7 | 489 | |
5f5c8ee5 | 490 | for (i = 0; i < dim.height; ++i) |
60a8948a | 491 | { |
5f5c8ee5 | 492 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
493 | |
494 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
495 | = (matrix->pool->glyphs |
496 | + (y + i) * matrix->pool->ncolumns | |
497 | + x); | |
177c0ea7 | 498 | |
5f5c8ee5 GM |
499 | if (w == NULL |
500 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 501 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
502 | { |
503 | row->glyphs[TEXT_AREA] | |
504 | = row->glyphs[LEFT_MARGIN_AREA]; | |
505 | row->glyphs[RIGHT_MARGIN_AREA] | |
506 | = row->glyphs[TEXT_AREA] + dim.width; | |
507 | row->glyphs[LAST_AREA] | |
508 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
509 | } | |
510 | else | |
511 | { | |
512 | row->glyphs[TEXT_AREA] | |
513 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
514 | row->glyphs[RIGHT_MARGIN_AREA] | |
515 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
516 | row->glyphs[LAST_AREA] | |
517 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
518 | } | |
60a8948a | 519 | } |
177c0ea7 | 520 | |
5f5c8ee5 GM |
521 | matrix->left_margin_glyphs = left; |
522 | matrix->right_margin_glyphs = right; | |
523 | } | |
524 | else | |
525 | { | |
526 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
6b61353c KH |
527 | its own memory. It is a window matrix for window-based redisplay. |
528 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
529 | if (dim.width > matrix->matrix_w |
530 | || new_rows | |
045dee35 | 531 | || header_line_changed_p |
5f5c8ee5 | 532 | || marginal_areas_changed_p) |
4588ec20 | 533 | { |
5f5c8ee5 GM |
534 | struct glyph_row *row = matrix->rows; |
535 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 536 | |
5f5c8ee5 GM |
537 | while (row < end) |
538 | { | |
539 | row->glyphs[LEFT_MARGIN_AREA] | |
0065d054 PE |
540 | = xnrealloc (row->glyphs[LEFT_MARGIN_AREA], |
541 | dim.width, sizeof (struct glyph)); | |
177c0ea7 | 542 | |
5f5c8ee5 GM |
543 | /* The mode line never has marginal areas. */ |
544 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 545 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
546 | { |
547 | row->glyphs[TEXT_AREA] | |
548 | = row->glyphs[LEFT_MARGIN_AREA]; | |
549 | row->glyphs[RIGHT_MARGIN_AREA] | |
550 | = row->glyphs[TEXT_AREA] + dim.width; | |
551 | row->glyphs[LAST_AREA] | |
552 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
553 | } | |
554 | else | |
555 | { | |
556 | row->glyphs[TEXT_AREA] | |
557 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
558 | row->glyphs[RIGHT_MARGIN_AREA] | |
559 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
560 | row->glyphs[LAST_AREA] | |
561 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
562 | } | |
563 | ++row; | |
564 | } | |
4588ec20 JB |
565 | } |
566 | ||
a54e2c05 | 567 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
568 | matrix->left_margin_glyphs = left; |
569 | matrix->right_margin_glyphs = right; | |
570 | } | |
177c0ea7 | 571 | |
5f5c8ee5 GM |
572 | /* Number of rows to be used by MATRIX. */ |
573 | matrix->nrows = dim.height; | |
a54e2c05 | 574 | eassert (matrix->nrows >= 0); |
5f5c8ee5 | 575 | |
b7b20fbd | 576 | if (w) |
5f5c8ee5 | 577 | { |
b7b20fbd | 578 | if (matrix == w->current_matrix) |
4588ec20 | 579 | { |
b7b20fbd GM |
580 | /* Mark rows in a current matrix of a window as not having |
581 | valid contents. It's important to not do this for | |
582 | desired matrices. When Emacs starts, it may already be | |
583 | building desired matrices when this function runs. */ | |
584 | if (window_width < 0) | |
585 | window_width = window_box_width (w, -1); | |
177c0ea7 | 586 | |
b7b20fbd GM |
587 | /* Optimize the case that only the height has changed (C-x 2, |
588 | upper window). Invalidate all rows that are no longer part | |
589 | of the window. */ | |
590 | if (!marginal_areas_changed_p | |
73d75a62 GM |
591 | && !header_line_changed_p |
592 | && new_rows == 0 | |
593 | && dim.width == matrix->matrix_w | |
7df02016 KS |
594 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
595 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 596 | && matrix->window_width == window_width) |
b7b20fbd | 597 | { |
dd42b31a GM |
598 | /* Find the last row in the window. */ |
599 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
600 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
601 | { | |
26447967 | 602 | ++i; |
dd42b31a GM |
603 | break; |
604 | } | |
b7b20fbd GM |
605 | |
606 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 607 | are invalidated below. */ |
d3d50620 DA |
608 | if (INTEGERP (w->window_end_vpos) |
609 | && XFASTINT (w->window_end_vpos) >= i) | |
e8c17b81 | 610 | wset_window_end_valid (w, Qnil); |
177c0ea7 | 611 | |
b7b20fbd GM |
612 | while (i < matrix->nrows) |
613 | matrix->rows[i++].enabled_p = 0; | |
614 | } | |
615 | else | |
616 | { | |
617 | for (i = 0; i < matrix->nrows; ++i) | |
618 | matrix->rows[i].enabled_p = 0; | |
619 | } | |
5f5c8ee5 | 620 | } |
b7b20fbd | 621 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 622 | { |
b7b20fbd GM |
623 | /* Rows in desired matrices always have to be cleared; |
624 | redisplay expects this is the case when it runs, so it | |
625 | had better be the case when we adjust matrices between | |
626 | redisplays. */ | |
5f5c8ee5 GM |
627 | for (i = 0; i < matrix->nrows; ++i) |
628 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 629 | } |
4588ec20 | 630 | } |
177c0ea7 JB |
631 | |
632 | ||
5f5c8ee5 GM |
633 | /* Remember last values to be able to optimize frame redraws. */ |
634 | matrix->matrix_x = x; | |
635 | matrix->matrix_y = y; | |
636 | matrix->matrix_w = dim.width; | |
637 | matrix->matrix_h = dim.height; | |
638 | ||
639 | /* Record the top y location and height of W at the time the matrix | |
640 | was last adjusted. This is used to optimize redisplay above. */ | |
641 | if (w) | |
4588ec20 | 642 | { |
7df02016 KS |
643 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
644 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
645 | matrix->window_height = window_height; |
646 | matrix->window_width = window_width; | |
647 | matrix->window_vscroll = w->vscroll; | |
648 | } | |
649 | } | |
4588ec20 | 650 | |
4588ec20 | 651 | |
5f5c8ee5 GM |
652 | /* Reverse the contents of rows in MATRIX between START and END. The |
653 | contents of the row at END - 1 end up at START, END - 2 at START + | |
654 | 1 etc. This is part of the implementation of rotate_matrix (see | |
655 | below). */ | |
d52bad65 | 656 | |
5f5c8ee5 | 657 | static void |
971de7fb | 658 | reverse_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 GM |
659 | { |
660 | int i, j; | |
23b0200c | 661 | |
5f5c8ee5 GM |
662 | for (i = start, j = end - 1; i < j; ++i, --j) |
663 | { | |
664 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
665 | initialization. */ | |
666 | struct glyph_row temp; | |
667 | temp = matrix->rows[i]; | |
668 | matrix->rows[i] = matrix->rows[j]; | |
669 | matrix->rows[j] = temp; | |
670 | } | |
671 | } | |
23b0200c | 672 | |
23b0200c | 673 | |
5f5c8ee5 GM |
674 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
675 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
676 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
677 | row structures are moved around). | |
60a8948a | 678 | |
5f5c8ee5 GM |
679 | The algorithm used for rotating the vector was, I believe, first |
680 | described by Kernighan. See the vector R as consisting of two | |
681 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
682 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
683 | and reverse the result to get (ArBr)r which is BA. Similar for | |
684 | rotating right. */ | |
685 | ||
686 | void | |
971de7fb | 687 | rotate_matrix (struct glyph_matrix *matrix, int first, int last, int by) |
5f5c8ee5 GM |
688 | { |
689 | if (by < 0) | |
690 | { | |
691 | /* Up (rotate left, i.e. towards lower indices). */ | |
692 | by = -by; | |
693 | reverse_rows (matrix, first, first + by); | |
694 | reverse_rows (matrix, first + by, last); | |
695 | reverse_rows (matrix, first, last); | |
696 | } | |
697 | else if (by > 0) | |
698 | { | |
699 | /* Down (rotate right, i.e. towards higher indices). */ | |
700 | reverse_rows (matrix, last - by, last); | |
701 | reverse_rows (matrix, first, last - by); | |
702 | reverse_rows (matrix, first, last); | |
703 | } | |
704 | } | |
705 | ||
706 | ||
707 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
708 | with indices START <= index < END. Increment positions by DELTA/ | |
709 | DELTA_BYTES. */ | |
710 | ||
711 | void | |
ace1712c | 712 | increment_matrix_positions (struct glyph_matrix *matrix, int start, int end, |
d311d28c | 713 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
714 | { |
715 | /* Check that START and END are reasonable values. */ | |
a54e2c05 DA |
716 | eassert (start >= 0 && start <= matrix->nrows); |
717 | eassert (end >= 0 && end <= matrix->nrows); | |
718 | eassert (start <= end); | |
5f5c8ee5 GM |
719 | |
720 | for (; start < end; ++start) | |
86c11ba1 | 721 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
722 | } |
723 | ||
724 | ||
59ea14cd PE |
725 | /* Clear the enable_p flags in a range of rows in glyph matrix MATRIX. |
726 | START and END are the row indices of the first and last + 1 row to clear. */ | |
5f5c8ee5 GM |
727 | |
728 | void | |
59ea14cd | 729 | clear_glyph_matrix_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 | 730 | { |
a54e2c05 DA |
731 | eassert (start <= end); |
732 | eassert (start >= 0 && start < matrix->nrows); | |
733 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 734 | |
5f5c8ee5 | 735 | for (; start < end; ++start) |
59ea14cd | 736 | matrix->rows[start].enabled_p = 0; |
5f5c8ee5 GM |
737 | } |
738 | ||
739 | ||
740 | /* Clear MATRIX. | |
741 | ||
59ea14cd PE |
742 | Empty all rows in MATRIX by clearing their enabled_p flags. |
743 | The function prepare_desired_row will eventually really clear a row | |
744 | when it sees one with a false enabled_p flag. | |
5f5c8ee5 | 745 | |
59ea14cd | 746 | Reset update hints to default values. The only update hint |
5f5c8ee5 GM |
747 | currently present is the flag MATRIX->no_scrolling_p. */ |
748 | ||
749 | void | |
971de7fb | 750 | clear_glyph_matrix (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
751 | { |
752 | if (matrix) | |
753 | { | |
59ea14cd | 754 | clear_glyph_matrix_rows (matrix, 0, matrix->nrows); |
5f5c8ee5 GM |
755 | matrix->no_scrolling_p = 0; |
756 | } | |
757 | } | |
177c0ea7 | 758 | |
5f5c8ee5 GM |
759 | |
760 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
761 | Increment y-positions in glyph rows between START and END by DY, | |
762 | and recompute their visible height. */ | |
763 | ||
764 | void | |
971de7fb | 765 | shift_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int start, int end, int dy) |
5f5c8ee5 GM |
766 | { |
767 | int min_y, max_y; | |
177c0ea7 | 768 | |
a54e2c05 DA |
769 | eassert (start <= end); |
770 | eassert (start >= 0 && start < matrix->nrows); | |
771 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 772 | |
7df02016 KS |
773 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
774 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 775 | |
5f5c8ee5 GM |
776 | for (; start < end; ++start) |
777 | { | |
778 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 779 | |
5f5c8ee5 | 780 | row->y += dy; |
d6c747a4 | 781 | row->visible_height = row->height; |
177c0ea7 | 782 | |
5f5c8ee5 | 783 | if (row->y < min_y) |
d6c747a4 GM |
784 | row->visible_height -= min_y - row->y; |
785 | if (row->y + row->height > max_y) | |
786 | row->visible_height -= row->y + row->height - max_y; | |
e61124cd YM |
787 | if (row->fringe_bitmap_periodic_p) |
788 | row->redraw_fringe_bitmaps_p = 1; | |
5f5c8ee5 GM |
789 | } |
790 | } | |
791 | ||
792 | ||
793 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
794 | invalid is done by setting enabled_p to zero for all rows in a | |
795 | current matrix. */ | |
796 | ||
797 | void | |
971de7fb | 798 | clear_current_matrices (register struct frame *f) |
5f5c8ee5 GM |
799 | { |
800 | /* Clear frame current matrix, if we have one. */ | |
801 | if (f->current_matrix) | |
802 | clear_glyph_matrix (f->current_matrix); | |
803 | ||
804 | /* Clear the matrix of the menu bar window, if such a window exists. | |
805 | The menu bar window is currently used to display menus on X when | |
806 | no toolkit support is compiled in. */ | |
e69b0960 DA |
807 | if (WINDOWP (f->menu_bar_window)) |
808 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
5f5c8ee5 | 809 | |
9ea173e8 | 810 | /* Clear the matrix of the tool-bar window, if any. */ |
e69b0960 DA |
811 | if (WINDOWP (f->tool_bar_window)) |
812 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
5f5c8ee5 GM |
813 | |
814 | /* Clear current window matrices. */ | |
a54e2c05 | 815 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
816 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); |
817 | } | |
818 | ||
819 | ||
820 | /* Clear out all display lines of F for a coming redisplay. */ | |
821 | ||
822 | void | |
971de7fb | 823 | clear_desired_matrices (register struct frame *f) |
5f5c8ee5 GM |
824 | { |
825 | if (f->desired_matrix) | |
826 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 827 | |
e69b0960 DA |
828 | if (WINDOWP (f->menu_bar_window)) |
829 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
5f5c8ee5 | 830 | |
e69b0960 DA |
831 | if (WINDOWP (f->tool_bar_window)) |
832 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
5f5c8ee5 GM |
833 | |
834 | /* Do it for window matrices. */ | |
a54e2c05 | 835 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
836 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); |
837 | } | |
838 | ||
839 | ||
59ea14cd PE |
840 | /* Clear matrices in window tree rooted in W. If DESIRED_P, |
841 | clear desired matrices, otherwise clear current matrices. */ | |
5f5c8ee5 GM |
842 | |
843 | static void | |
59ea14cd | 844 | clear_window_matrices (struct window *w, bool desired_p) |
5f5c8ee5 GM |
845 | { |
846 | while (w) | |
847 | { | |
d3d50620 | 848 | if (!NILP (w->hchild)) |
5f5c8ee5 | 849 | { |
d3d50620 DA |
850 | eassert (WINDOWP (w->hchild)); |
851 | clear_window_matrices (XWINDOW (w->hchild), desired_p); | |
5f5c8ee5 | 852 | } |
d3d50620 | 853 | else if (!NILP (w->vchild)) |
5f5c8ee5 | 854 | { |
d3d50620 DA |
855 | eassert (WINDOWP (w->vchild)); |
856 | clear_window_matrices (XWINDOW (w->vchild), desired_p); | |
5f5c8ee5 GM |
857 | } |
858 | else | |
859 | { | |
860 | if (desired_p) | |
861 | clear_glyph_matrix (w->desired_matrix); | |
862 | else | |
863 | { | |
864 | clear_glyph_matrix (w->current_matrix); | |
e8c17b81 | 865 | wset_window_end_valid (w, Qnil); |
5f5c8ee5 GM |
866 | } |
867 | } | |
868 | ||
d3d50620 | 869 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
870 | } |
871 | } | |
872 | ||
873 | ||
874 | \f | |
875 | /*********************************************************************** | |
876 | Glyph Rows | |
877 | ||
878 | See dispextern.h for an overall explanation of glyph rows. | |
879 | ***********************************************************************/ | |
880 | ||
881 | /* Clear glyph row ROW. Do it in a way that makes it robust against | |
882 | changes in the glyph_row structure, i.e. addition or removal of | |
883 | structure members. */ | |
884 | ||
2cca872d KH |
885 | static struct glyph_row null_row; |
886 | ||
5f5c8ee5 | 887 | void |
971de7fb | 888 | clear_glyph_row (struct glyph_row *row) |
5f5c8ee5 GM |
889 | { |
890 | struct glyph *p[1 + LAST_AREA]; | |
5f5c8ee5 GM |
891 | |
892 | /* Save pointers. */ | |
893 | p[LEFT_MARGIN_AREA] = row->glyphs[LEFT_MARGIN_AREA]; | |
894 | p[TEXT_AREA] = row->glyphs[TEXT_AREA]; | |
895 | p[RIGHT_MARGIN_AREA] = row->glyphs[RIGHT_MARGIN_AREA]; | |
896 | p[LAST_AREA] = row->glyphs[LAST_AREA]; | |
897 | ||
898 | /* Clear. */ | |
899 | *row = null_row; | |
900 | ||
901 | /* Restore pointers. */ | |
902 | row->glyphs[LEFT_MARGIN_AREA] = p[LEFT_MARGIN_AREA]; | |
903 | row->glyphs[TEXT_AREA] = p[TEXT_AREA]; | |
904 | row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA]; | |
905 | row->glyphs[LAST_AREA] = p[LAST_AREA]; | |
45560b1a GM |
906 | |
907 | #if 0 /* At some point, some bit-fields of struct glyph were not set, | |
908 | which made glyphs unequal when compared with GLYPH_EQUAL_P. | |
909 | Redisplay outputs such glyphs, and flickering effects were | |
910 | the result. This also depended on the contents of memory | |
911 | returned by xmalloc. If flickering happens again, activate | |
153a073c | 912 | the code below. If the flickering is gone with that, chances |
45560b1a | 913 | are that the flickering has the same reason as here. */ |
72af86bd | 914 | memset (p[0], 0, (char *) p[LAST_AREA] - (char *) p[0]); |
45560b1a | 915 | #endif |
5f5c8ee5 GM |
916 | } |
917 | ||
918 | ||
919 | /* Make ROW an empty, enabled row of canonical character height, | |
920 | in window W starting at y-position Y. */ | |
921 | ||
922 | void | |
971de7fb | 923 | blank_row (struct window *w, struct glyph_row *row, int y) |
5f5c8ee5 GM |
924 | { |
925 | int min_y, max_y; | |
177c0ea7 | 926 | |
7df02016 KS |
927 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
928 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 929 | |
5f5c8ee5 GM |
930 | clear_glyph_row (row); |
931 | row->y = y; | |
408f5064 | 932 | row->ascent = row->phys_ascent = 0; |
d3d50620 | 933 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 934 | row->visible_height = row->height; |
177c0ea7 | 935 | |
5f5c8ee5 | 936 | if (row->y < min_y) |
d6c747a4 GM |
937 | row->visible_height -= min_y - row->y; |
938 | if (row->y + row->height > max_y) | |
939 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
940 | |
941 | row->enabled_p = 1; | |
942 | } | |
943 | ||
944 | ||
945 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
946 | are the amounts by which to change positions. Note that the first | |
947 | glyph of the text area of a row can have a buffer position even if | |
948 | the used count of the text area is zero. Such rows display line | |
949 | ends. */ | |
950 | ||
5bf46f05 | 951 | static void |
ace1712c | 952 | increment_row_positions (struct glyph_row *row, |
d311d28c | 953 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
954 | { |
955 | int area, i; | |
956 | ||
957 | /* Increment start and end positions. */ | |
958 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
959 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
960 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
961 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
d36fe237 EZ |
962 | CHARPOS (row->start.pos) += delta; |
963 | BYTEPOS (row->start.pos) += delta_bytes; | |
964 | CHARPOS (row->end.pos) += delta; | |
965 | BYTEPOS (row->end.pos) += delta_bytes; | |
5f5c8ee5 | 966 | |
5cacdcfd KS |
967 | if (!row->enabled_p) |
968 | return; | |
969 | ||
5f5c8ee5 GM |
970 | /* Increment positions in glyphs. */ |
971 | for (area = 0; area < LAST_AREA; ++area) | |
972 | for (i = 0; i < row->used[area]; ++i) | |
973 | if (BUFFERP (row->glyphs[area][i].object) | |
974 | && row->glyphs[area][i].charpos > 0) | |
975 | row->glyphs[area][i].charpos += delta; | |
976 | ||
977 | /* Capture the case of rows displaying a line end. */ | |
978 | if (row->used[TEXT_AREA] == 0 | |
979 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
980 | row->glyphs[TEXT_AREA]->charpos += delta; | |
981 | } | |
982 | ||
983 | ||
9af3e742 | 984 | #if 0 |
5f5c8ee5 GM |
985 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
986 | contents, i.e. glyph structure contents are exchanged between A and | |
987 | B without changing glyph pointers in A and B. */ | |
988 | ||
989 | static void | |
1dae0f0a | 990 | swap_glyphs_in_rows (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
991 | { |
992 | int area; | |
993 | ||
994 | for (area = 0; area < LAST_AREA; ++area) | |
995 | { | |
996 | /* Number of glyphs to swap. */ | |
997 | int max_used = max (a->used[area], b->used[area]); | |
998 | ||
999 | /* Start of glyphs in area of row A. */ | |
1000 | struct glyph *glyph_a = a->glyphs[area]; | |
1001 | ||
1002 | /* End + 1 of glyphs in area of row A. */ | |
1003 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
1004 | ||
1005 | /* Start of glyphs in area of row B. */ | |
1006 | struct glyph *glyph_b = b->glyphs[area]; | |
1007 | ||
1008 | while (glyph_a < glyph_a_end) | |
1009 | { | |
1010 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
1011 | initialization. */ | |
1012 | struct glyph temp; | |
1013 | temp = *glyph_a; | |
1014 | *glyph_a = *glyph_b; | |
1015 | *glyph_b = temp; | |
1016 | ++glyph_a; | |
1017 | ++glyph_b; | |
1018 | } | |
1019 | } | |
1020 | } | |
1021 | ||
9af3e742 | 1022 | #endif /* 0 */ |
5f5c8ee5 | 1023 | |
015137db EZ |
1024 | /* Exchange pointers to glyph memory between glyph rows A and B. Also |
1025 | exchange the used[] array and the hash values of the rows, because | |
1026 | these should all go together for the row's hash value to be | |
1027 | correct. */ | |
5f5c8ee5 | 1028 | |
b0ab8123 | 1029 | static void |
971de7fb | 1030 | swap_glyph_pointers (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1031 | { |
1032 | int i; | |
015137db EZ |
1033 | unsigned hash_tem = a->hash; |
1034 | ||
5f5c8ee5 GM |
1035 | for (i = 0; i < LAST_AREA + 1; ++i) |
1036 | { | |
1037 | struct glyph *temp = a->glyphs[i]; | |
015137db | 1038 | |
5f5c8ee5 GM |
1039 | a->glyphs[i] = b->glyphs[i]; |
1040 | b->glyphs[i] = temp; | |
73055685 EZ |
1041 | if (i < LAST_AREA) |
1042 | { | |
1043 | short used_tem = a->used[i]; | |
1044 | ||
1045 | a->used[i] = b->used[i]; | |
1046 | b->used[i] = used_tem; | |
1047 | } | |
5f5c8ee5 | 1048 | } |
015137db EZ |
1049 | a->hash = b->hash; |
1050 | b->hash = hash_tem; | |
5f5c8ee5 GM |
1051 | } |
1052 | ||
1053 | ||
1054 | /* Copy glyph row structure FROM to glyph row structure TO, except | |
015137db EZ |
1055 | that glyph pointers, the `used' counts, and the hash values in the |
1056 | structures are left unchanged. */ | |
5f5c8ee5 | 1057 | |
b0ab8123 | 1058 | static void |
971de7fb | 1059 | copy_row_except_pointers (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1060 | { |
1061 | struct glyph *pointers[1 + LAST_AREA]; | |
73055685 | 1062 | short used[LAST_AREA]; |
015137db | 1063 | unsigned hashval; |
5f5c8ee5 GM |
1064 | |
1065 | /* Save glyph pointers of TO. */ | |
72af86bd | 1066 | memcpy (pointers, to->glyphs, sizeof to->glyphs); |
015137db EZ |
1067 | memcpy (used, to->used, sizeof to->used); |
1068 | hashval = to->hash; | |
5f5c8ee5 GM |
1069 | |
1070 | /* Do a structure assignment. */ | |
1071 | *to = *from; | |
1072 | ||
1073 | /* Restore original pointers of TO. */ | |
72af86bd | 1074 | memcpy (to->glyphs, pointers, sizeof to->glyphs); |
015137db EZ |
1075 | memcpy (to->used, used, sizeof to->used); |
1076 | to->hash = hashval; | |
5f5c8ee5 GM |
1077 | } |
1078 | ||
1079 | ||
5f5c8ee5 GM |
1080 | /* Assign glyph row FROM to glyph row TO. This works like a structure |
1081 | assignment TO = FROM, except that glyph pointers are not copied but | |
1082 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1083 | a memory leak. */ | |
1084 | ||
b0ab8123 | 1085 | static void |
971de7fb | 1086 | assign_row (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1087 | { |
1088 | swap_glyph_pointers (to, from); | |
1089 | copy_row_except_pointers (to, from); | |
1090 | } | |
1091 | ||
1092 | ||
1093 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1094 | a row in a window matrix, is a slice of the glyph memory of the | |
1095 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
59ea14cd | 1096 | is true if the glyph memory of WINDOW_ROW is part of the glyph |
5f5c8ee5 GM |
1097 | memory of FRAME_ROW. */ |
1098 | ||
e509cfa6 | 1099 | #ifdef GLYPH_DEBUG |
9339e87f | 1100 | |
59ea14cd | 1101 | static bool |
59fc5cf9 | 1102 | glyph_row_slice_p (struct glyph_row *window_row, struct glyph_row *frame_row) |
5f5c8ee5 GM |
1103 | { |
1104 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1105 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1106 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1107 | ||
1108 | return (frame_glyph_start <= window_glyph_start | |
1109 | && window_glyph_start < frame_glyph_end); | |
1110 | } | |
1111 | ||
9339e87f | 1112 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1113 | |
9af3e742 GM |
1114 | #if 0 |
1115 | ||
5f5c8ee5 GM |
1116 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1117 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1118 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1119 | ||
1120 | static struct glyph_row * | |
59fc5cf9 AS |
1121 | find_glyph_row_slice (struct glyph_matrix *window_matrix, |
1122 | struct glyph_matrix *frame_matrix, int row) | |
5f5c8ee5 GM |
1123 | { |
1124 | int i; | |
1125 | ||
a54e2c05 | 1126 | eassert (row >= 0 && row < frame_matrix->nrows); |
5f5c8ee5 GM |
1127 | |
1128 | for (i = 0; i < window_matrix->nrows; ++i) | |
1129 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1130 | frame_matrix->rows + row)) | |
1131 | break; | |
1132 | ||
1133 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1134 | } | |
1135 | ||
9af3e742 | 1136 | #endif /* 0 */ |
5f5c8ee5 GM |
1137 | |
1138 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1139 | i.e. they are only marked as to be cleared by setting their | |
1140 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1141 | call to this function really clears it. */ | |
1142 | ||
1143 | void | |
971de7fb | 1144 | prepare_desired_row (struct glyph_row *row) |
5f5c8ee5 GM |
1145 | { |
1146 | if (!row->enabled_p) | |
1147 | { | |
59ea14cd | 1148 | bool rp = row->reversed_p; |
5009f85e | 1149 | |
5f5c8ee5 GM |
1150 | clear_glyph_row (row); |
1151 | row->enabled_p = 1; | |
5009f85e | 1152 | row->reversed_p = rp; |
5f5c8ee5 GM |
1153 | } |
1154 | } | |
1155 | ||
1156 | ||
1157 | /* Return a hash code for glyph row ROW. */ | |
1158 | ||
2f7c71a1 | 1159 | static int |
971de7fb | 1160 | line_hash_code (struct glyph_row *row) |
5f5c8ee5 GM |
1161 | { |
1162 | int hash = 0; | |
177c0ea7 | 1163 | |
5f5c8ee5 GM |
1164 | if (row->enabled_p) |
1165 | { | |
4cecaab8 MB |
1166 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1167 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1168 | ||
1169 | while (glyph < end) | |
1170 | { | |
1171 | int c = glyph->u.ch; | |
1172 | int face_id = glyph->face_id; | |
daf01701 | 1173 | if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
4cecaab8 MB |
1174 | c -= SPACEGLYPH; |
1175 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1176 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1177 | ++glyph; | |
1178 | } | |
5f5c8ee5 | 1179 | |
4cecaab8 MB |
1180 | if (hash == 0) |
1181 | hash = 1; | |
5f5c8ee5 GM |
1182 | } |
1183 | ||
1184 | return hash; | |
1185 | } | |
1186 | ||
1187 | ||
153a073c | 1188 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1189 | the number of characters in the line. If must_write_spaces is |
1190 | zero, leading and trailing spaces are ignored. */ | |
1191 | ||
dfd153ae | 1192 | static int |
971de7fb | 1193 | line_draw_cost (struct glyph_matrix *matrix, int vpos) |
5f5c8ee5 GM |
1194 | { |
1195 | struct glyph_row *row = matrix->rows + vpos; | |
1196 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1197 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1198 | int len; | |
1199 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
ca9ce8f2 | 1200 | ptrdiff_t glyph_table_len = GLYPH_TABLE_LENGTH; |
5f5c8ee5 GM |
1201 | |
1202 | /* Ignore trailing and leading spaces if we can. */ | |
daf01701 | 1203 | if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
5f5c8ee5 GM |
1204 | { |
1205 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1206 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1207 | --end; |
1208 | ||
177c0ea7 | 1209 | /* All blank line. */ |
5f5c8ee5 GM |
1210 | if (end == beg) |
1211 | return 0; | |
1212 | ||
1213 | /* Skip over leading spaces. */ | |
1214 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1215 | ++beg; | |
1216 | } | |
1217 | ||
1218 | /* If we don't have a glyph-table, each glyph is one character, | |
1219 | so return the number of glyphs. */ | |
1220 | if (glyph_table_base == 0) | |
1221 | len = end - beg; | |
1222 | else | |
1223 | { | |
1224 | /* Otherwise, scan the glyphs and accumulate their total length | |
1225 | in LEN. */ | |
1226 | len = 0; | |
1227 | while (beg < end) | |
1228 | { | |
3fc809e2 | 1229 | GLYPH g; |
177c0ea7 | 1230 | |
3fc809e2 KS |
1231 | SET_GLYPH_FROM_CHAR_GLYPH (g, *beg); |
1232 | ||
565b39a8 | 1233 | if (GLYPH_INVALID_P (g) |
42186983 | 1234 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) |
5f5c8ee5 GM |
1235 | len += 1; |
1236 | else | |
1237 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1238 | |
5f5c8ee5 GM |
1239 | ++beg; |
1240 | } | |
1241 | } | |
177c0ea7 | 1242 | |
5f5c8ee5 GM |
1243 | return len; |
1244 | } | |
1245 | ||
1246 | ||
59ea14cd PE |
1247 | /* Return true if the glyph rows A and B have equal contents. |
1248 | MOUSE_FACE_P means compare the mouse_face_p flags of A and B, too. */ | |
5f5c8ee5 | 1249 | |
b0ab8123 | 1250 | static bool |
59ea14cd | 1251 | row_equal_p (struct glyph_row *a, struct glyph_row *b, bool mouse_face_p) |
5f5c8ee5 | 1252 | { |
a54e2c05 DA |
1253 | eassert (verify_row_hash (a)); |
1254 | eassert (verify_row_hash (b)); | |
7a7270dd | 1255 | |
5f5c8ee5 GM |
1256 | if (a == b) |
1257 | return 1; | |
1258 | else if (a->hash != b->hash) | |
1259 | return 0; | |
1260 | else | |
1261 | { | |
1262 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1263 | int area; | |
1264 | ||
e4e0bee9 GM |
1265 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1266 | return 0; | |
1267 | ||
5f5c8ee5 GM |
1268 | /* Compare glyphs. */ |
1269 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1270 | { | |
1271 | if (a->used[area] != b->used[area]) | |
1272 | return 0; | |
177c0ea7 | 1273 | |
5f5c8ee5 GM |
1274 | a_glyph = a->glyphs[area]; |
1275 | a_end = a_glyph + a->used[area]; | |
1276 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1277 | |
5f5c8ee5 GM |
1278 | while (a_glyph < a_end |
1279 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1280 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1281 | |
5f5c8ee5 GM |
1282 | if (a_glyph != a_end) |
1283 | return 0; | |
1284 | } | |
1285 | ||
6b61353c KH |
1286 | if (a->fill_line_p != b->fill_line_p |
1287 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1288 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
1289 | || a->left_fringe_face_id != b->left_fringe_face_id | |
e61124cd | 1290 | || a->left_fringe_offset != b->left_fringe_offset |
6b61353c KH |
1291 | || a->right_fringe_bitmap != b->right_fringe_bitmap |
1292 | || a->right_fringe_face_id != b->right_fringe_face_id | |
e61124cd YM |
1293 | || a->right_fringe_offset != b->right_fringe_offset |
1294 | || a->fringe_bitmap_periodic_p != b->fringe_bitmap_periodic_p | |
3d4a365f | 1295 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
6b61353c | 1296 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1297 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1298 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1299 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
918f4159 | 1300 | || a->reversed_p != b->reversed_p |
5f5c8ee5 GM |
1301 | /* Different partially visible characters on left margin. */ |
1302 | || a->x != b->x | |
1303 | /* Different height. */ | |
1304 | || a->ascent != b->ascent | |
408f5064 GM |
1305 | || a->phys_ascent != b->phys_ascent |
1306 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1307 | || a->visible_height != b->visible_height) |
1308 | return 0; | |
1309 | } | |
1310 | ||
1311 | return 1; | |
1312 | } | |
1313 | ||
1314 | ||
1315 | \f | |
1316 | /*********************************************************************** | |
1317 | Glyph Pool | |
1318 | ||
1319 | See dispextern.h for an overall explanation of glyph pools. | |
1320 | ***********************************************************************/ | |
1321 | ||
1322 | /* Allocate a glyph_pool structure. The structure returned is | |
1323 | initialized with zeros. The global variable glyph_pool_count is | |
1324 | incremented for each pool allocated. */ | |
1325 | ||
1326 | static struct glyph_pool * | |
971de7fb | 1327 | new_glyph_pool (void) |
5f5c8ee5 | 1328 | { |
23f86fce | 1329 | struct glyph_pool *result = xzalloc (sizeof *result); |
177c0ea7 | 1330 | |
5f5c8ee5 GM |
1331 | /* For memory leak and double deletion checking. */ |
1332 | ++glyph_pool_count; | |
177c0ea7 | 1333 | |
5f5c8ee5 GM |
1334 | return result; |
1335 | } | |
1336 | ||
1337 | ||
1338 | /* Free a glyph_pool structure POOL. The function may be called with | |
1339 | a null POOL pointer. The global variable glyph_pool_count is | |
1340 | decremented with every pool structure freed. If this count gets | |
1341 | negative, more structures were freed than allocated, i.e. one | |
1342 | structure must have been freed more than once or a bogus pointer | |
1343 | was passed to free_glyph_pool. */ | |
1344 | ||
1345 | static void | |
971de7fb | 1346 | free_glyph_pool (struct glyph_pool *pool) |
5f5c8ee5 GM |
1347 | { |
1348 | if (pool) | |
1349 | { | |
153a073c | 1350 | /* More freed than allocated? */ |
5f5c8ee5 | 1351 | --glyph_pool_count; |
a54e2c05 | 1352 | eassert (glyph_pool_count >= 0); |
5f5c8ee5 GM |
1353 | |
1354 | xfree (pool->glyphs); | |
1355 | xfree (pool); | |
1356 | } | |
1357 | } | |
1358 | ||
1359 | ||
1360 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1361 | columns we need. This function never shrinks a pool. The only | |
1362 | case in which this would make sense, would be when a frame's size | |
1363 | is changed from a large value to a smaller one. But, if someone | |
1364 | does it once, we can expect that he will do it again. | |
1365 | ||
59ea14cd | 1366 | Return true if the pool changed in a way which makes |
5f5c8ee5 GM |
1367 | re-adjusting window glyph matrices necessary. */ |
1368 | ||
59ea14cd | 1369 | static bool |
971de7fb | 1370 | realloc_glyph_pool (struct glyph_pool *pool, struct dim matrix_dim) |
5f5c8ee5 | 1371 | { |
ca9ce8f2 | 1372 | ptrdiff_t needed; |
59ea14cd | 1373 | bool changed_p; |
5f5c8ee5 GM |
1374 | |
1375 | changed_p = (pool->glyphs == 0 | |
1376 | || matrix_dim.height != pool->nrows | |
1377 | || matrix_dim.width != pool->ncolumns); | |
1378 | ||
1379 | /* Enlarge the glyph pool. */ | |
ca9ce8f2 | 1380 | needed = matrix_dim.width; |
0065d054 PE |
1381 | if (INT_MULTIPLY_OVERFLOW (needed, matrix_dim.height)) |
1382 | memory_full (SIZE_MAX); | |
ca9ce8f2 | 1383 | needed *= matrix_dim.height; |
5f5c8ee5 GM |
1384 | if (needed > pool->nglyphs) |
1385 | { | |
0065d054 PE |
1386 | ptrdiff_t old_nglyphs = pool->nglyphs; |
1387 | pool->glyphs = xpalloc (pool->glyphs, &pool->nglyphs, | |
1388 | needed - old_nglyphs, -1, sizeof *pool->glyphs); | |
1389 | memset (pool->glyphs + old_nglyphs, 0, | |
1390 | (pool->nglyphs - old_nglyphs) * sizeof *pool->glyphs); | |
5f5c8ee5 GM |
1391 | } |
1392 | ||
153a073c | 1393 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1394 | to do sanity checks, and (b) the number of columns determines |
1395 | where rows in the frame matrix start---this must be available to | |
1396 | determine pointers to rows of window sub-matrices. */ | |
1397 | pool->nrows = matrix_dim.height; | |
1398 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1399 | |
5f5c8ee5 GM |
1400 | return changed_p; |
1401 | } | |
1402 | ||
1403 | ||
1404 | \f | |
1405 | /*********************************************************************** | |
1406 | Debug Code | |
1407 | ***********************************************************************/ | |
1408 | ||
e509cfa6 | 1409 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 1410 | |
a13396c9 | 1411 | |
28d440ab KL |
1412 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1413 | XXX Maybe this should be changed to flush the current terminal instead of | |
1414 | stdout. | |
1415 | */ | |
a13396c9 | 1416 | |
85fece3e PE |
1417 | void flush_stdout (void) EXTERNALLY_VISIBLE; |
1418 | ||
a13396c9 | 1419 | void |
59fc5cf9 | 1420 | flush_stdout (void) |
a13396c9 GM |
1421 | { |
1422 | fflush (stdout); | |
1423 | } | |
1424 | ||
1425 | ||
5f5c8ee5 GM |
1426 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1427 | pointer has been lost, e.g. by using a structure assignment between | |
1428 | rows, at least one pointer must occur more than once in the rows of | |
1429 | MATRIX. */ | |
1430 | ||
1431 | void | |
59fc5cf9 | 1432 | check_matrix_pointer_lossage (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
1433 | { |
1434 | int i, j; | |
177c0ea7 | 1435 | |
5f5c8ee5 GM |
1436 | for (i = 0; i < matrix->nrows; ++i) |
1437 | for (j = 0; j < matrix->nrows; ++j) | |
a54e2c05 | 1438 | eassert (i == j |
5f5c8ee5 GM |
1439 | || (matrix->rows[i].glyphs[TEXT_AREA] |
1440 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1441 | } | |
1442 | ||
1443 | ||
1444 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1445 | ||
1446 | struct glyph_row * | |
59fc5cf9 | 1447 | matrix_row (struct glyph_matrix *matrix, int row) |
5f5c8ee5 | 1448 | { |
a54e2c05 DA |
1449 | eassert (matrix && matrix->rows); |
1450 | eassert (row >= 0 && row < matrix->nrows); | |
5f5c8ee5 GM |
1451 | |
1452 | /* That's really too slow for normal testing because this function | |
1453 | is called almost everywhere. Although---it's still astonishingly | |
1454 | fast, so it is valuable to have for debugging purposes. */ | |
1455 | #if 0 | |
1456 | check_matrix_pointer_lossage (matrix); | |
1457 | #endif | |
177c0ea7 | 1458 | |
5f5c8ee5 GM |
1459 | return matrix->rows + row; |
1460 | } | |
1461 | ||
1462 | ||
1463 | #if 0 /* This function makes invalid assumptions when text is | |
1464 | partially invisible. But it might come handy for debugging | |
1465 | nevertheless. */ | |
1466 | ||
1467 | /* Check invariants that must hold for an up to date current matrix of | |
1468 | window W. */ | |
1469 | ||
1470 | static void | |
59fc5cf9 | 1471 | check_matrix_invariants (struct window *w) |
5f5c8ee5 GM |
1472 | { |
1473 | struct glyph_matrix *matrix = w->current_matrix; | |
1474 | int yb = window_text_bottom_y (w); | |
1475 | struct glyph_row *row = matrix->rows; | |
1476 | struct glyph_row *last_text_row = NULL; | |
1477 | struct buffer *saved = current_buffer; | |
d3d50620 | 1478 | struct buffer *buffer = XBUFFER (w->buffer); |
5f5c8ee5 | 1479 | int c; |
177c0ea7 | 1480 | |
5f5c8ee5 GM |
1481 | /* This can sometimes happen for a fresh window. */ |
1482 | if (matrix->nrows < 2) | |
1483 | return; | |
1484 | ||
1485 | set_buffer_temp (buffer); | |
1486 | ||
1487 | /* Note: last row is always reserved for the mode line. */ | |
1488 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1489 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1490 | { | |
1491 | struct glyph_row *next = row + 1; | |
1492 | ||
1493 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1494 | last_text_row = row; | |
1495 | ||
1496 | /* Check that character and byte positions are in sync. */ | |
a54e2c05 | 1497 | eassert (MATRIX_ROW_START_BYTEPOS (row) |
5f5c8ee5 | 1498 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); |
a54e2c05 | 1499 | eassert (BYTEPOS (row->start.pos) |
d36fe237 | 1500 | == CHAR_TO_BYTE (CHARPOS (row->start.pos))); |
5f5c8ee5 GM |
1501 | |
1502 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1503 | have such a position temporarily in case of a minibuffer | |
1504 | displaying something like `[Sole completion]' at its end. */ | |
1505 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
d36fe237 | 1506 | { |
a54e2c05 | 1507 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
d36fe237 | 1508 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); |
a54e2c05 | 1509 | eassert (BYTEPOS (row->end.pos) |
d36fe237 EZ |
1510 | == CHAR_TO_BYTE (CHARPOS (row->end.pos))); |
1511 | } | |
5f5c8ee5 GM |
1512 | |
1513 | /* Check that end position of `row' is equal to start position | |
1514 | of next row. */ | |
1515 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1516 | { | |
a54e2c05 | 1517 | eassert (MATRIX_ROW_END_CHARPOS (row) |
5f5c8ee5 | 1518 | == MATRIX_ROW_START_CHARPOS (next)); |
a54e2c05 | 1519 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
5f5c8ee5 | 1520 | == MATRIX_ROW_START_BYTEPOS (next)); |
a54e2c05 DA |
1521 | eassert (CHARPOS (row->end.pos) == CHARPOS (next->start.pos)); |
1522 | eassert (BYTEPOS (row->end.pos) == BYTEPOS (next->start.pos)); | |
5f5c8ee5 GM |
1523 | } |
1524 | row = next; | |
1525 | } | |
1526 | ||
a54e2c05 DA |
1527 | eassert (w->current_matrix->nrows == w->desired_matrix->nrows); |
1528 | eassert (w->desired_matrix->rows != NULL); | |
5f5c8ee5 GM |
1529 | set_buffer_temp (saved); |
1530 | } | |
1531 | ||
1532 | #endif /* 0 */ | |
1533 | ||
e509cfa6 | 1534 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
1535 | |
1536 | ||
1537 | \f | |
1538 | /********************************************************************** | |
1539 | Allocating/ Adjusting Glyph Matrices | |
1540 | **********************************************************************/ | |
1541 | ||
1542 | /* Allocate glyph matrices over a window tree for a frame-based | |
1543 | redisplay | |
1544 | ||
1545 | X and Y are column/row within the frame glyph matrix where | |
1546 | sub-matrices for the window tree rooted at WINDOW must be | |
59ea14cd | 1547 | allocated. DIM_ONLY_P means that the caller of this |
8ce2650d YM |
1548 | function is only interested in the result matrix dimension, and |
1549 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1550 | |
1551 | The function returns the total width/height of the sub-matrices of | |
1552 | the window tree. If called on a frame root window, the computation | |
1553 | will take the mini-buffer window into account. | |
1554 | ||
1555 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1556 | ||
1557 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1558 | glyph matrices yet, and | |
1559 | ||
1560 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1561 | any window in the tree will be changed or have been changed (see | |
153a073c | 1562 | DIM_ONLY_P) |
5f5c8ee5 GM |
1563 | |
1564 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1565 | function. | |
1566 | ||
1567 | Windows are arranged into chains of windows on the same level | |
1568 | through the next fields of window structures. Such a level can be | |
1569 | either a sequence of horizontally adjacent windows from left to | |
1570 | right, or a sequence of vertically adjacent windows from top to | |
1571 | bottom. Each window in a horizontal sequence can be either a leaf | |
1572 | window or a vertical sequence; a window in a vertical sequence can | |
1573 | be either a leaf or a horizontal sequence. All windows in a | |
1574 | horizontal sequence have the same height, and all windows in a | |
1575 | vertical sequence have the same width. | |
1576 | ||
1577 | This function uses, for historical reasons, a more general | |
1578 | algorithm to determine glyph matrix dimensions that would be | |
1579 | necessary. | |
1580 | ||
1581 | The matrix height of a horizontal sequence is determined by the | |
1582 | maximum height of any matrix in the sequence. The matrix width of | |
1583 | a horizontal sequence is computed by adding up matrix widths of | |
1584 | windows in the sequence. | |
1585 | ||
1586 | |<------- result width ------->| | |
1587 | +---------+----------+---------+ --- | |
1588 | | | | | | | |
1589 | | | | | | |
1590 | +---------+ | | result height | |
1591 | | +---------+ | |
1592 | | | | | |
1593 | +----------+ --- | |
1594 | ||
1595 | The matrix width of a vertical sequence is the maximum matrix width | |
1596 | of any window in the sequence. Its height is computed by adding up | |
1597 | matrix heights of windows in the sequence. | |
1598 | ||
1599 | |<---- result width -->| | |
1600 | +---------+ --- | |
1601 | | | | | |
1602 | | | | | |
1603 | +---------+--+ | | |
1604 | | | | | |
1605 | | | result height | |
1606 | | | | |
1607 | +------------+---------+ | | |
1608 | | | | | |
1609 | | | | | |
1610 | +------------+---------+ --- */ | |
1611 | ||
1612 | /* Bit indicating that a new matrix will be allocated or has been | |
1613 | allocated. */ | |
1614 | ||
1615 | #define NEW_LEAF_MATRIX (1 << 0) | |
1616 | ||
1617 | /* Bit indicating that a matrix will or has changed its location or | |
1618 | size. */ | |
1619 | ||
1620 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1621 | ||
1622 | static struct dim | |
6f704c76 | 1623 | allocate_matrices_for_frame_redisplay (Lisp_Object window, int x, int y, |
59ea14cd | 1624 | bool dim_only_p, int *window_change_flags) |
5f5c8ee5 GM |
1625 | { |
1626 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1627 | int x0 = x, y0 = y; | |
1628 | int wmax = 0, hmax = 0; | |
1629 | struct dim total; | |
1630 | struct dim dim; | |
1631 | struct window *w; | |
59ea14cd | 1632 | bool in_horz_combination_p; |
5f5c8ee5 GM |
1633 | |
1634 | /* What combination is WINDOW part of? Compute this once since the | |
1635 | result is the same for all windows in the `next' chain. The | |
1636 | special case of a root window (parent equal to nil) is treated | |
1637 | like a vertical combination because a root window's `next' | |
1638 | points to the mini-buffer window, if any, which is arranged | |
1639 | vertically below other windows. */ | |
1640 | in_horz_combination_p | |
d3d50620 DA |
1641 | = (!NILP (XWINDOW (window)->parent) |
1642 | && !NILP (XWINDOW (XWINDOW (window)->parent)->hchild)); | |
5f5c8ee5 GM |
1643 | |
1644 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1645 | do |
5f5c8ee5 GM |
1646 | { |
1647 | w = XWINDOW (window); | |
1648 | ||
1649 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1650 | on whether this is a combination or a leaf window. */ |
d3d50620 DA |
1651 | if (!NILP (w->hchild)) |
1652 | dim = allocate_matrices_for_frame_redisplay (w->hchild, x, y, | |
5f5c8ee5 GM |
1653 | dim_only_p, |
1654 | window_change_flags); | |
d3d50620 DA |
1655 | else if (!NILP (w->vchild)) |
1656 | dim = allocate_matrices_for_frame_redisplay (w->vchild, x, y, | |
5f5c8ee5 GM |
1657 | dim_only_p, |
1658 | window_change_flags); | |
1659 | else | |
1660 | { | |
1661 | /* If not already done, allocate sub-matrix structures. */ | |
1662 | if (w->desired_matrix == NULL) | |
1663 | { | |
1664 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1665 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1666 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1667 | } | |
177c0ea7 | 1668 | |
5f5c8ee5 GM |
1669 | /* Width and height MUST be chosen so that there are no |
1670 | holes in the frame matrix. */ | |
5d3cc43c GM |
1671 | dim.width = required_matrix_width (w); |
1672 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1673 | |
1674 | /* Will matrix be re-allocated? */ | |
1675 | if (x != w->desired_matrix->matrix_x | |
1676 | || y != w->desired_matrix->matrix_y | |
1677 | || dim.width != w->desired_matrix->matrix_w | |
1678 | || dim.height != w->desired_matrix->matrix_h | |
1679 | || (margin_glyphs_to_reserve (w, dim.width, | |
d3d50620 | 1680 | w->left_margin_cols) |
5f5c8ee5 GM |
1681 | != w->desired_matrix->left_margin_glyphs) |
1682 | || (margin_glyphs_to_reserve (w, dim.width, | |
d3d50620 | 1683 | w->right_margin_cols) |
5f5c8ee5 GM |
1684 | != w->desired_matrix->right_margin_glyphs)) |
1685 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1686 | ||
1687 | /* Actually change matrices, if allowed. Do not consider | |
1688 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1689 | may have been changed which we don't now here. We trust | |
59ea14cd | 1690 | that we only will be called with DIM_ONLY_P when |
5f5c8ee5 GM |
1691 | necessary. */ |
1692 | if (!dim_only_p) | |
1693 | { | |
1694 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1695 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1696 | } | |
1697 | } | |
1698 | ||
1699 | /* If we are part of a horizontal combination, advance x for | |
1700 | windows to the right of W; otherwise advance y for windows | |
1701 | below W. */ | |
1702 | if (in_horz_combination_p) | |
1703 | x += dim.width; | |
177c0ea7 | 1704 | else |
5f5c8ee5 GM |
1705 | y += dim.height; |
1706 | ||
1707 | /* Remember maximum glyph matrix dimensions. */ | |
1708 | wmax = max (wmax, dim.width); | |
1709 | hmax = max (hmax, dim.height); | |
1710 | ||
1711 | /* Next window on same level. */ | |
d3d50620 | 1712 | window = w->next; |
5f5c8ee5 GM |
1713 | } |
1714 | while (!NILP (window)); | |
1715 | ||
1716 | /* Set `total' to the total glyph matrix dimension of this window | |
1717 | level. In a vertical combination, the width is the width of the | |
1718 | widest window; the height is the y we finally reached, corrected | |
1719 | by the y we started with. In a horizontal combination, the total | |
1720 | height is the height of the tallest window, and the width is the | |
1721 | x we finally reached, corrected by the x we started with. */ | |
1722 | if (in_horz_combination_p) | |
1723 | { | |
1724 | total.width = x - x0; | |
1725 | total.height = hmax; | |
1726 | } | |
177c0ea7 | 1727 | else |
5f5c8ee5 GM |
1728 | { |
1729 | total.width = wmax; | |
1730 | total.height = y - y0; | |
1731 | } | |
1732 | ||
1733 | return total; | |
1734 | } | |
1735 | ||
1736 | ||
5d3cc43c GM |
1737 | /* Return the required height of glyph matrices for window W. */ |
1738 | ||
2f7c71a1 | 1739 | static int |
971de7fb | 1740 | required_matrix_height (struct window *w) |
5d3cc43c GM |
1741 | { |
1742 | #ifdef HAVE_WINDOW_SYSTEM | |
d3d50620 | 1743 | struct frame *f = XFRAME (w->frame); |
177c0ea7 | 1744 | |
5d3cc43c GM |
1745 | if (FRAME_WINDOW_P (f)) |
1746 | { | |
1747 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1ea40aa2 | 1748 | int window_pixel_height = window_box_height (w) + eabs (w->vscroll); |
5d3cc43c | 1749 | return (((window_pixel_height + ch_height - 1) |
cc834cf9 | 1750 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
1751 | /* One partially visible line at the top and |
1752 | bottom of the window. */ | |
1753 | + 2 | |
153a073c | 1754 | /* 2 for header and mode line. */ |
5d3cc43c GM |
1755 | + 2); |
1756 | } | |
1757 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 1758 | |
7df02016 | 1759 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
1760 | } |
1761 | ||
1762 | ||
1763 | /* Return the required width of glyph matrices for window W. */ | |
1764 | ||
2f7c71a1 | 1765 | static int |
971de7fb | 1766 | required_matrix_width (struct window *w) |
5d3cc43c GM |
1767 | { |
1768 | #ifdef HAVE_WINDOW_SYSTEM | |
d3d50620 | 1769 | struct frame *f = XFRAME (w->frame); |
5d3cc43c GM |
1770 | if (FRAME_WINDOW_P (f)) |
1771 | { | |
1772 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 1773 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 1774 | |
5d3cc43c GM |
1775 | /* Compute number of glyphs needed in a glyph row. */ |
1776 | return (((window_pixel_width + ch_width - 1) | |
cc834cf9 | 1777 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
1778 | /* 2 partially visible columns in the text area. */ |
1779 | + 2 | |
1780 | /* One partially visible column at the right | |
1781 | edge of each marginal area. */ | |
1782 | + 1 + 1); | |
1783 | } | |
1784 | #endif /* HAVE_WINDOW_SYSTEM */ | |
1785 | ||
d3d50620 | 1786 | return XINT (w->total_cols); |
5d3cc43c GM |
1787 | } |
1788 | ||
1789 | ||
5f5c8ee5 | 1790 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 1791 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 1792 | |
5f5c8ee5 | 1793 | static void |
971de7fb | 1794 | allocate_matrices_for_window_redisplay (struct window *w) |
5f5c8ee5 | 1795 | { |
5f5c8ee5 GM |
1796 | while (w) |
1797 | { | |
d3d50620 DA |
1798 | if (!NILP (w->vchild)) |
1799 | allocate_matrices_for_window_redisplay (XWINDOW (w->vchild)); | |
1800 | else if (!NILP (w->hchild)) | |
1801 | allocate_matrices_for_window_redisplay (XWINDOW (w->hchild)); | |
5f5c8ee5 GM |
1802 | else |
1803 | { | |
1804 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
1805 | struct dim dim; |
1806 | ||
1807 | /* If matrices are not yet allocated, allocate them now. */ | |
1808 | if (w->desired_matrix == NULL) | |
1809 | { | |
1810 | w->desired_matrix = new_glyph_matrix (NULL); | |
1811 | w->current_matrix = new_glyph_matrix (NULL); | |
1812 | } | |
1813 | ||
5d3cc43c GM |
1814 | dim.width = required_matrix_width (w); |
1815 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1816 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
1817 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
1818 | } | |
177c0ea7 | 1819 | |
d3d50620 | 1820 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
5f5c8ee5 GM |
1821 | } |
1822 | } | |
1823 | ||
1824 | ||
1825 | /* Re-allocate/ re-compute glyph matrices on frame F. If F is null, | |
1826 | do it for all frames; otherwise do it just for the given frame. | |
1827 | This function must be called when a new frame is created, its size | |
1828 | changes, or its window configuration changes. */ | |
1829 | ||
1830 | void | |
971de7fb | 1831 | adjust_glyphs (struct frame *f) |
5f5c8ee5 | 1832 | { |
408f5064 GM |
1833 | /* Block input so that expose events and other events that access |
1834 | glyph matrices are not processed while we are changing them. */ | |
4d7e6e51 | 1835 | block_input (); |
408f5064 | 1836 | |
5f5c8ee5 GM |
1837 | if (f) |
1838 | adjust_frame_glyphs (f); | |
1839 | else | |
1840 | { | |
1841 | Lisp_Object tail, lisp_frame; | |
177c0ea7 | 1842 | |
5f5c8ee5 GM |
1843 | FOR_EACH_FRAME (tail, lisp_frame) |
1844 | adjust_frame_glyphs (XFRAME (lisp_frame)); | |
1845 | } | |
408f5064 | 1846 | |
4d7e6e51 | 1847 | unblock_input (); |
5f5c8ee5 GM |
1848 | } |
1849 | ||
5f5c8ee5 GM |
1850 | /* Allocate/reallocate glyph matrices of a single frame F. */ |
1851 | ||
1852 | static void | |
971de7fb | 1853 | adjust_frame_glyphs (struct frame *f) |
5f5c8ee5 GM |
1854 | { |
1855 | if (FRAME_WINDOW_P (f)) | |
1856 | adjust_frame_glyphs_for_window_redisplay (f); | |
1857 | else | |
1858 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 1859 | |
5f5c8ee5 GM |
1860 | /* Don't forget the message buffer and the buffer for |
1861 | decode_mode_spec. */ | |
1862 | adjust_frame_message_buffer (f); | |
1863 | adjust_decode_mode_spec_buffer (f); | |
1864 | ||
1865 | f->glyphs_initialized_p = 1; | |
1866 | } | |
1867 | ||
59ea14cd | 1868 | /* Return true if any window in the tree has nonzero window margins. See |
075757cc | 1869 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ |
59ea14cd | 1870 | static bool |
971de7fb | 1871 | showing_window_margins_p (struct window *w) |
075757cc CY |
1872 | { |
1873 | while (w) | |
1874 | { | |
d3d50620 | 1875 | if (!NILP (w->hchild)) |
075757cc | 1876 | { |
d3d50620 | 1877 | if (showing_window_margins_p (XWINDOW (w->hchild))) |
075757cc CY |
1878 | return 1; |
1879 | } | |
d3d50620 | 1880 | else if (!NILP (w->vchild)) |
075757cc | 1881 | { |
d3d50620 | 1882 | if (showing_window_margins_p (XWINDOW (w->vchild))) |
075757cc CY |
1883 | return 1; |
1884 | } | |
d3d50620 DA |
1885 | else if (!NILP (w->left_margin_cols) |
1886 | || !NILP (w->right_margin_cols)) | |
075757cc | 1887 | return 1; |
3fc809e2 | 1888 | |
d3d50620 | 1889 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
075757cc CY |
1890 | } |
1891 | return 0; | |
1892 | } | |
1893 | ||
5f5c8ee5 | 1894 | |
c9f00270 GM |
1895 | /* In the window tree with root W, build current matrices of leaf |
1896 | windows from the frame's current matrix. */ | |
1897 | ||
1898 | static void | |
971de7fb | 1899 | fake_current_matrices (Lisp_Object window) |
c9f00270 GM |
1900 | { |
1901 | struct window *w; | |
177c0ea7 | 1902 | |
d3d50620 | 1903 | for (; !NILP (window); window = w->next) |
c9f00270 GM |
1904 | { |
1905 | w = XWINDOW (window); | |
177c0ea7 | 1906 | |
d3d50620 DA |
1907 | if (!NILP (w->hchild)) |
1908 | fake_current_matrices (w->hchild); | |
1909 | else if (!NILP (w->vchild)) | |
1910 | fake_current_matrices (w->vchild); | |
c9f00270 GM |
1911 | else |
1912 | { | |
1913 | int i; | |
d3d50620 | 1914 | struct frame *f = XFRAME (w->frame); |
c9f00270 GM |
1915 | struct glyph_matrix *m = w->current_matrix; |
1916 | struct glyph_matrix *fm = f->current_matrix; | |
1917 | ||
a54e2c05 DA |
1918 | eassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
1919 | eassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 1920 | |
c9f00270 GM |
1921 | for (i = 0; i < m->matrix_h; ++i) |
1922 | { | |
1923 | struct glyph_row *r = m->rows + i; | |
7df02016 | 1924 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 | 1925 | |
a54e2c05 | 1926 | eassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] |
c9f00270 GM |
1927 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); |
1928 | ||
1929 | r->enabled_p = fr->enabled_p; | |
1930 | if (r->enabled_p) | |
1931 | { | |
1932 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
1933 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
1934 | r->used[TEXT_AREA] = (m->matrix_w | |
1935 | - r->used[LEFT_MARGIN_AREA] | |
1936 | - r->used[RIGHT_MARGIN_AREA]); | |
1937 | r->mode_line_p = 0; | |
c9f00270 GM |
1938 | } |
1939 | } | |
1940 | } | |
1941 | } | |
1942 | } | |
1943 | ||
1944 | ||
bccee4f2 | 1945 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 1946 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 1947 | |
bccee4f2 | 1948 | static struct glyph_matrix * |
971de7fb | 1949 | save_current_matrix (struct frame *f) |
c9f00270 | 1950 | { |
bccee4f2 | 1951 | int i; |
38182d90 | 1952 | struct glyph_matrix *saved = xzalloc (sizeof *saved); |
bccee4f2 | 1953 | saved->nrows = f->current_matrix->nrows; |
23f86fce | 1954 | saved->rows = xzalloc (saved->nrows * sizeof *saved->rows); |
bccee4f2 GM |
1955 | |
1956 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 1957 | { |
bccee4f2 GM |
1958 | struct glyph_row *from = f->current_matrix->rows + i; |
1959 | struct glyph_row *to = saved->rows + i; | |
dfd153ae | 1960 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
23f86fce | 1961 | to->glyphs[TEXT_AREA] = xmalloc (nbytes); |
72af86bd | 1962 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
bccee4f2 | 1963 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
e797dea6 | 1964 | } |
bccee4f2 GM |
1965 | |
1966 | return saved; | |
1967 | } | |
1968 | ||
1969 | ||
1970 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
1971 | and free memory associated with SAVED. */ | |
1972 | ||
1973 | static void | |
971de7fb | 1974 | restore_current_matrix (struct frame *f, struct glyph_matrix *saved) |
bccee4f2 GM |
1975 | { |
1976 | int i; | |
1977 | ||
1978 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 1979 | { |
bccee4f2 GM |
1980 | struct glyph_row *from = saved->rows + i; |
1981 | struct glyph_row *to = f->current_matrix->rows + i; | |
dfd153ae | 1982 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
72af86bd | 1983 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
e797dea6 | 1984 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
bccee4f2 | 1985 | xfree (from->glyphs[TEXT_AREA]); |
e797dea6 | 1986 | } |
177c0ea7 | 1987 | |
bccee4f2 GM |
1988 | xfree (saved->rows); |
1989 | xfree (saved); | |
c9f00270 GM |
1990 | } |
1991 | ||
1992 | ||
bccee4f2 | 1993 | |
5f5c8ee5 GM |
1994 | /* Allocate/reallocate glyph matrices of a single frame F for |
1995 | frame-based redisplay. */ | |
1996 | ||
1997 | static void | |
971de7fb | 1998 | adjust_frame_glyphs_for_frame_redisplay (struct frame *f) |
5f5c8ee5 | 1999 | { |
5f5c8ee5 | 2000 | struct dim matrix_dim; |
59ea14cd | 2001 | bool pool_changed_p; |
5f5c8ee5 GM |
2002 | int window_change_flags; |
2003 | int top_window_y; | |
2004 | ||
2005 | if (!FRAME_LIVE_P (f)) | |
2006 | return; | |
2007 | ||
5f5c8ee5 GM |
2008 | top_window_y = FRAME_TOP_MARGIN (f); |
2009 | ||
2010 | /* Allocate glyph pool structures if not already done. */ | |
2011 | if (f->desired_pool == NULL) | |
2012 | { | |
2013 | f->desired_pool = new_glyph_pool (); | |
2014 | f->current_pool = new_glyph_pool (); | |
2015 | } | |
2016 | ||
2017 | /* Allocate frames matrix structures if needed. */ | |
2018 | if (f->desired_matrix == NULL) | |
2019 | { | |
2020 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
2021 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
2022 | } | |
177c0ea7 | 2023 | |
5f5c8ee5 GM |
2024 | /* Compute window glyph matrices. (This takes the mini-buffer |
2025 | window into account). The result is the size of the frame glyph | |
2026 | matrix needed. The variable window_change_flags is set to a bit | |
2027 | mask indicating whether new matrices will be allocated or | |
2028 | existing matrices change their size or location within the frame | |
2029 | matrix. */ | |
2030 | window_change_flags = 0; | |
2031 | matrix_dim | |
2032 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
2033 | 0, top_window_y, | |
5d3cc43c | 2034 | 1, |
5f5c8ee5 GM |
2035 | &window_change_flags); |
2036 | ||
2037 | /* Add in menu bar lines, if any. */ | |
2038 | matrix_dim.height += top_window_y; | |
2039 | ||
2040 | /* Enlarge pools as necessary. */ | |
2041 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
2042 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
2043 | ||
177c0ea7 | 2044 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
2045 | absolutely necessary since it requires a frame redraw. */ |
2046 | if (pool_changed_p || window_change_flags) | |
2047 | { | |
2048 | /* Do it for window matrices. */ | |
2049 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 2050 | 0, top_window_y, 0, |
5f5c8ee5 GM |
2051 | &window_change_flags); |
2052 | ||
2053 | /* Size of frame matrices must equal size of frame. Note | |
2054 | that we are called for X frames with window widths NOT equal | |
2055 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
a54e2c05 | 2056 | eassert (matrix_dim.width == FRAME_COLS (f) |
7df02016 | 2057 | && matrix_dim.height == FRAME_LINES (f)); |
177c0ea7 | 2058 | |
e797dea6 GM |
2059 | /* Pointers to glyph memory in glyph rows are exchanged during |
2060 | the update phase of redisplay, which means in general that a | |
2061 | frame's current matrix consists of pointers into both the | |
2062 | desired and current glyph pool of the frame. Adjusting a | |
2063 | matrix sets the frame matrix up so that pointers are all into | |
2064 | the same pool. If we want to preserve glyph contents of the | |
2065 | current matrix over a call to adjust_glyph_matrix, we must | |
2066 | make a copy of the current glyphs, and restore the current | |
2067 | matrix' contents from that copy. */ | |
2068 | if (display_completed | |
2069 | && !FRAME_GARBAGED_P (f) | |
2070 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
2071 | && matrix_dim.height == f->current_matrix->matrix_h |
2072 | /* For some reason, the frame glyph matrix gets corrupted if | |
2073 | any of the windows contain margins. I haven't been able | |
2074 | to hunt down the reason, but for the moment this prevents | |
2075 | the problem from manifesting. -- cyd */ | |
d5c20fe8 | 2076 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) |
e797dea6 | 2077 | { |
bccee4f2 GM |
2078 | struct glyph_matrix *copy = save_current_matrix (f); |
2079 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2080 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2081 | restore_current_matrix (f, copy); |
e797dea6 GM |
2082 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2083 | } | |
c9f00270 | 2084 | else |
e797dea6 | 2085 | { |
bccee4f2 | 2086 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2087 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2088 | SET_FRAME_GARBAGED (f); | |
2089 | } | |
5f5c8ee5 GM |
2090 | } |
2091 | } | |
2092 | ||
2093 | ||
2094 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2095 | window-based redisplay. */ | |
2096 | ||
2097 | static void | |
971de7fb | 2098 | adjust_frame_glyphs_for_window_redisplay (struct frame *f) |
5f5c8ee5 | 2099 | { |
a54e2c05 | 2100 | eassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); |
177c0ea7 | 2101 | |
5f5c8ee5 | 2102 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2103 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2104 | |
8ce2650d | 2105 | #ifdef HAVE_X_WINDOWS |
5f5c8ee5 GM |
2106 | /* Allocate/ reallocate matrices of the dummy window used to display |
2107 | the menu bar under X when no X toolkit support is available. */ | |
488dd4c4 | 2108 | #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2109 | { |
2110 | /* Allocate a dummy window if not already done. */ | |
d2d37ddc | 2111 | struct window *w; |
e69b0960 | 2112 | if (NILP (f->menu_bar_window)) |
5f5c8ee5 | 2113 | { |
077288cf | 2114 | Lisp_Object frame; |
f00af5b1 | 2115 | fset_menu_bar_window (f, make_window ()); |
e69b0960 | 2116 | w = XWINDOW (f->menu_bar_window); |
077288cf | 2117 | XSETFRAME (frame, f); |
e8c17b81 | 2118 | wset_frame (w, frame); |
5f5c8ee5 GM |
2119 | w->pseudo_window_p = 1; |
2120 | } | |
2121 | else | |
e69b0960 | 2122 | w = XWINDOW (f->menu_bar_window); |
5f5c8ee5 GM |
2123 | |
2124 | /* Set window dimensions to frame dimensions and allocate or | |
2125 | adjust glyph matrices of W. */ | |
e8c17b81 PE |
2126 | wset_top_line (w, make_number (0)); |
2127 | wset_left_col (w, make_number (0)); | |
2128 | wset_total_lines (w, make_number (FRAME_MENU_BAR_LINES (f))); | |
2129 | wset_total_cols (w, make_number (FRAME_TOTAL_COLS (f))); | |
5d3cc43c | 2130 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2131 | } |
57714a86 YM |
2132 | #endif /* not USE_X_TOOLKIT && not USE_GTK */ |
2133 | #endif /* HAVE_X_WINDOWS */ | |
5f5c8ee5 | 2134 | |
488dd4c4 | 2135 | #ifndef USE_GTK |
d2d37ddc PE |
2136 | { |
2137 | /* Allocate/ reallocate matrices of the tool bar window. If we | |
2138 | don't have a tool bar window yet, make one. */ | |
2139 | struct window *w; | |
e69b0960 | 2140 | if (NILP (f->tool_bar_window)) |
d2d37ddc | 2141 | { |
077288cf | 2142 | Lisp_Object frame; |
f00af5b1 | 2143 | fset_tool_bar_window (f, make_window ()); |
e69b0960 | 2144 | w = XWINDOW (f->tool_bar_window); |
077288cf | 2145 | XSETFRAME (frame, f); |
e8c17b81 | 2146 | wset_frame (w, frame); |
d2d37ddc PE |
2147 | w->pseudo_window_p = 1; |
2148 | } | |
2149 | else | |
e69b0960 | 2150 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2151 | |
e8c17b81 PE |
2152 | wset_top_line (w, make_number (FRAME_MENU_BAR_LINES (f))); |
2153 | wset_left_col (w, make_number (0)); | |
2154 | wset_total_lines (w, make_number (FRAME_TOOL_BAR_LINES (f))); | |
2155 | wset_total_cols (w, make_number (FRAME_TOTAL_COLS (f))); | |
d2d37ddc PE |
2156 | allocate_matrices_for_window_redisplay (w); |
2157 | } | |
488dd4c4 | 2158 | #endif |
5f5c8ee5 GM |
2159 | } |
2160 | ||
2161 | ||
177c0ea7 | 2162 | /* Adjust/ allocate message buffer of frame F. |
5f5c8ee5 | 2163 | |
5f5c8ee5 GM |
2164 | Note that the message buffer is never freed. Since I could not |
2165 | find a free in 19.34, I assume that freeing it would be | |
2166 | problematic in some way and don't do it either. | |
2167 | ||
2168 | (Implementation note: It should be checked if we can free it | |
2169 | eventually without causing trouble). */ | |
2170 | ||
2171 | static void | |
971de7fb | 2172 | adjust_frame_message_buffer (struct frame *f) |
5f5c8ee5 | 2173 | { |
38182d90 PE |
2174 | FRAME_MESSAGE_BUF (f) = xrealloc (FRAME_MESSAGE_BUF (f), |
2175 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
5f5c8ee5 GM |
2176 | } |
2177 | ||
2178 | ||
2179 | /* Re-allocate buffer for decode_mode_spec on frame F. */ | |
2180 | ||
2181 | static void | |
971de7fb | 2182 | adjust_decode_mode_spec_buffer (struct frame *f) |
5f5c8ee5 | 2183 | { |
38182d90 PE |
2184 | f->decode_mode_spec_buffer = xrealloc (f->decode_mode_spec_buffer, |
2185 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
5f5c8ee5 GM |
2186 | } |
2187 | ||
2188 | ||
2189 | \f | |
2190 | /********************************************************************** | |
2191 | Freeing Glyph Matrices | |
2192 | **********************************************************************/ | |
2193 | ||
2194 | /* Free glyph memory for a frame F. F may be null. This function can | |
2195 | be called for the same frame more than once. The root window of | |
2196 | F may be nil when this function is called. This is the case when | |
2197 | the function is called when F is destroyed. */ | |
2198 | ||
2199 | void | |
971de7fb | 2200 | free_glyphs (struct frame *f) |
5f5c8ee5 GM |
2201 | { |
2202 | if (f && f->glyphs_initialized_p) | |
2203 | { | |
42f55fe0 GM |
2204 | /* Block interrupt input so that we don't get surprised by an X |
2205 | event while we're in an inconsistent state. */ | |
4d7e6e51 | 2206 | block_input (); |
5f5c8ee5 | 2207 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2208 | |
5f5c8ee5 | 2209 | /* Release window sub-matrices. */ |
e69b0960 DA |
2210 | if (!NILP (f->root_window)) |
2211 | free_window_matrices (XWINDOW (f->root_window)); | |
5f5c8ee5 GM |
2212 | |
2213 | /* Free the dummy window for menu bars without X toolkit and its | |
2214 | glyph matrices. */ | |
e69b0960 | 2215 | if (!NILP (f->menu_bar_window)) |
5f5c8ee5 | 2216 | { |
e69b0960 | 2217 | struct window *w = XWINDOW (f->menu_bar_window); |
5f5c8ee5 GM |
2218 | free_glyph_matrix (w->desired_matrix); |
2219 | free_glyph_matrix (w->current_matrix); | |
2220 | w->desired_matrix = w->current_matrix = NULL; | |
f00af5b1 | 2221 | fset_menu_bar_window (f, Qnil); |
5f5c8ee5 GM |
2222 | } |
2223 | ||
9ea173e8 | 2224 | /* Free the tool bar window and its glyph matrices. */ |
e69b0960 | 2225 | if (!NILP (f->tool_bar_window)) |
5f5c8ee5 | 2226 | { |
e69b0960 | 2227 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2228 | free_glyph_matrix (w->desired_matrix); |
2229 | free_glyph_matrix (w->current_matrix); | |
2230 | w->desired_matrix = w->current_matrix = NULL; | |
f00af5b1 | 2231 | fset_tool_bar_window (f, Qnil); |
5f5c8ee5 GM |
2232 | } |
2233 | ||
2234 | /* Release frame glyph matrices. Reset fields to zero in | |
2235 | case we are called a second time. */ | |
2236 | if (f->desired_matrix) | |
2237 | { | |
2238 | free_glyph_matrix (f->desired_matrix); | |
2239 | free_glyph_matrix (f->current_matrix); | |
2240 | f->desired_matrix = f->current_matrix = NULL; | |
2241 | } | |
2242 | ||
2243 | /* Release glyph pools. */ | |
2244 | if (f->desired_pool) | |
2245 | { | |
2246 | free_glyph_pool (f->desired_pool); | |
2247 | free_glyph_pool (f->current_pool); | |
2248 | f->desired_pool = f->current_pool = NULL; | |
2249 | } | |
177c0ea7 | 2250 | |
4d7e6e51 | 2251 | unblock_input (); |
5f5c8ee5 GM |
2252 | } |
2253 | } | |
2254 | ||
2255 | ||
2256 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2257 | function may be called with a null pointer, and it may be called on | |
2258 | the same tree more than once. */ | |
2259 | ||
2260 | void | |
971de7fb | 2261 | free_window_matrices (struct window *w) |
5f5c8ee5 GM |
2262 | { |
2263 | while (w) | |
2264 | { | |
d3d50620 DA |
2265 | if (!NILP (w->hchild)) |
2266 | free_window_matrices (XWINDOW (w->hchild)); | |
2267 | else if (!NILP (w->vchild)) | |
2268 | free_window_matrices (XWINDOW (w->vchild)); | |
177c0ea7 | 2269 | else |
5f5c8ee5 GM |
2270 | { |
2271 | /* This is a leaf window. Free its memory and reset fields | |
2272 | to zero in case this function is called a second time for | |
2273 | W. */ | |
2274 | free_glyph_matrix (w->current_matrix); | |
2275 | free_glyph_matrix (w->desired_matrix); | |
2276 | w->current_matrix = w->desired_matrix = NULL; | |
2277 | } | |
2278 | ||
2279 | /* Next window on same level. */ | |
d3d50620 | 2280 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2281 | } |
2282 | } | |
2283 | ||
2284 | ||
2285 | /* Check glyph memory leaks. This function is called from | |
2286 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2287 | exits. We therefore free all glyph memory for all active frames | |
2288 | explicitly and check that nothing is left allocated. */ | |
2289 | ||
2290 | void | |
971de7fb | 2291 | check_glyph_memory (void) |
5f5c8ee5 GM |
2292 | { |
2293 | Lisp_Object tail, frame; | |
2294 | ||
2295 | /* Free glyph memory for all frames. */ | |
2296 | FOR_EACH_FRAME (tail, frame) | |
2297 | free_glyphs (XFRAME (frame)); | |
2298 | ||
2299 | /* Check that nothing is left allocated. */ | |
2300 | if (glyph_matrix_count) | |
1088b922 | 2301 | emacs_abort (); |
5f5c8ee5 | 2302 | if (glyph_pool_count) |
1088b922 | 2303 | emacs_abort (); |
5f5c8ee5 GM |
2304 | } |
2305 | ||
2306 | ||
2307 | \f | |
2308 | /********************************************************************** | |
2309 | Building a Frame Matrix | |
2310 | **********************************************************************/ | |
2311 | ||
2312 | /* Most of the redisplay code works on glyph matrices attached to | |
2313 | windows. This is a good solution most of the time, but it is not | |
2314 | suitable for terminal code. Terminal output functions cannot rely | |
2315 | on being able to set an arbitrary terminal window. Instead they | |
2316 | must be provided with a view of the whole frame, i.e. the whole | |
2317 | screen. We build such a view by constructing a frame matrix from | |
2318 | window matrices in this section. | |
2319 | ||
2320 | Windows that must be updated have their must_be_update_p flag set. | |
2321 | For all such windows, their desired matrix is made part of the | |
2322 | desired frame matrix. For other windows, their current matrix is | |
2323 | made part of the desired frame matrix. | |
2324 | ||
2325 | +-----------------+----------------+ | |
2326 | | desired | desired | | |
2327 | | | | | |
2328 | +-----------------+----------------+ | |
2329 | | current | | |
2330 | | | | |
2331 | +----------------------------------+ | |
2332 | ||
2333 | Desired window matrices can be made part of the frame matrix in a | |
2334 | cheap way: We exploit the fact that the desired frame matrix and | |
2335 | desired window matrices share their glyph memory. This is not | |
2336 | possible for current window matrices. Their glyphs are copied to | |
2337 | the desired frame matrix. The latter is equivalent to | |
2338 | preserve_other_columns in the old redisplay. | |
2339 | ||
2340 | Used glyphs counters for frame matrix rows are the result of adding | |
2341 | up glyph lengths of the window matrices. A line in the frame | |
2342 | matrix is enabled, if a corresponding line in a window matrix is | |
2343 | enabled. | |
177c0ea7 | 2344 | |
5f5c8ee5 GM |
2345 | After building the desired frame matrix, it will be passed to |
2346 | terminal code, which will manipulate both the desired and current | |
2347 | frame matrix. Changes applied to the frame's current matrix have | |
2348 | to be visible in current window matrices afterwards, of course. | |
2349 | ||
2350 | This problem is solved like this: | |
2351 | ||
2352 | 1. Window and frame matrices share glyphs. Window matrices are | |
2353 | constructed in a way that their glyph contents ARE the glyph | |
2354 | contents needed in a frame matrix. Thus, any modification of | |
2355 | glyphs done in terminal code will be reflected in window matrices | |
2356 | automatically. | |
177c0ea7 | 2357 | |
5f5c8ee5 GM |
2358 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2359 | intercepted by hook functions so that corresponding row operations | |
2360 | on window matrices can be performed. This is necessary because we | |
2361 | use pointers to glyphs in glyph row structures. To satisfy the | |
2362 | assumption of point 1 above that glyphs are updated implicitly in | |
2363 | window matrices when they are manipulated via the frame matrix, | |
2364 | window and frame matrix must of course agree where to find the | |
2365 | glyphs for their rows. Possible manipulations that must be | |
2366 | mirrored are assignments of rows of the desired frame matrix to the | |
2367 | current frame matrix and scrolling the current frame matrix. */ | |
2368 | ||
2369 | /* Build frame F's desired matrix from window matrices. Only windows | |
2370 | which have the flag must_be_updated_p set have to be updated. Menu | |
2371 | bar lines of a frame are not covered by window matrices, so make | |
2372 | sure not to touch them in this function. */ | |
2373 | ||
2374 | static void | |
971de7fb | 2375 | build_frame_matrix (struct frame *f) |
5f5c8ee5 GM |
2376 | { |
2377 | int i; | |
2378 | ||
2379 | /* F must have a frame matrix when this function is called. */ | |
a54e2c05 | 2380 | eassert (!FRAME_WINDOW_P (f)); |
177c0ea7 | 2381 | |
5f5c8ee5 GM |
2382 | /* Clear all rows in the frame matrix covered by window matrices. |
2383 | Menu bar lines are not covered by windows. */ | |
2384 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2385 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2386 | ||
2387 | /* Build the matrix by walking the window tree. */ | |
2388 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2389 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2390 | } | |
2391 | ||
2392 | ||
2393 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2394 | matrices. W is the root of a window tree. */ | |
2395 | ||
2396 | static void | |
971de7fb | 2397 | build_frame_matrix_from_window_tree (struct glyph_matrix *matrix, struct window *w) |
5f5c8ee5 GM |
2398 | { |
2399 | while (w) | |
2400 | { | |
d3d50620 DA |
2401 | if (!NILP (w->hchild)) |
2402 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->hchild)); | |
2403 | else if (!NILP (w->vchild)) | |
2404 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->vchild)); | |
5f5c8ee5 GM |
2405 | else |
2406 | build_frame_matrix_from_leaf_window (matrix, w); | |
2407 | ||
d3d50620 | 2408 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2409 | } |
2410 | } | |
2411 | ||
2412 | ||
2413 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2414 | desired frame matrix built. W is a leaf window whose desired or | |
2415 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2416 | must_be_updated_p determines which matrix it contributes to | |
59ea14cd | 2417 | FRAME_MATRIX. If W->must_be_updated_p, W's desired matrix |
5f5c8ee5 GM |
2418 | is added to FRAME_MATRIX, otherwise W's current matrix is added. |
2419 | Adding a desired matrix means setting up used counters and such in | |
2420 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2421 | means copying glyphs. The latter case corresponds to | |
2422 | preserve_other_columns in the old redisplay. */ | |
2423 | ||
2424 | static void | |
971de7fb | 2425 | build_frame_matrix_from_leaf_window (struct glyph_matrix *frame_matrix, struct window *w) |
5f5c8ee5 GM |
2426 | { |
2427 | struct glyph_matrix *window_matrix; | |
2428 | int window_y, frame_y; | |
2429 | /* If non-zero, a glyph to insert at the right border of W. */ | |
3fc809e2 KS |
2430 | GLYPH right_border_glyph; |
2431 | ||
2432 | SET_GLYPH_FROM_CHAR (right_border_glyph, 0); | |
5f5c8ee5 GM |
2433 | |
2434 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2435 | if (w->must_be_updated_p) | |
2436 | { | |
2437 | window_matrix = w->desired_matrix; | |
2438 | ||
2439 | /* Decide whether we want to add a vertical border glyph. */ | |
2440 | if (!WINDOW_RIGHTMOST_P (w)) | |
2441 | { | |
2442 | struct Lisp_Char_Table *dp = window_display_table (w); | |
3fc809e2 | 2443 | Lisp_Object gc; |
b4e49aee | 2444 | |
3fc809e2 KS |
2445 | SET_GLYPH_FROM_CHAR (right_border_glyph, '|'); |
2446 | if (dp | |
d311d28c | 2447 | && (gc = DISP_BORDER_GLYPH (dp), GLYPH_CODE_P (gc))) |
3fc809e2 KS |
2448 | { |
2449 | SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph, gc); | |
2450 | spec_glyph_lookup_face (w, &right_border_glyph); | |
2451 | } | |
b4e49aee | 2452 | |
3fc809e2 KS |
2453 | if (GLYPH_FACE (right_border_glyph) <= 0) |
2454 | SET_GLYPH_FACE (right_border_glyph, VERTICAL_BORDER_FACE_ID); | |
5f5c8ee5 GM |
2455 | } |
2456 | } | |
2457 | else | |
2458 | window_matrix = w->current_matrix; | |
2459 | ||
2460 | /* For all rows in the window matrix and corresponding rows in the | |
2461 | frame matrix. */ | |
2462 | window_y = 0; | |
2463 | frame_y = window_matrix->matrix_y; | |
2464 | while (window_y < window_matrix->nrows) | |
2465 | { | |
2466 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2467 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
59ea14cd | 2468 | bool current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2469 | |
2470 | /* Fill up the frame row with spaces up to the left margin of the | |
2471 | window row. */ | |
2472 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2473 | ||
2474 | /* Fill up areas in the window matrix row with spaces. */ | |
2475 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2476 | |
2477 | /* If only part of W's desired matrix has been built, and | |
2478 | window_row wasn't displayed, use the corresponding current | |
2479 | row instead. */ | |
2480 | if (window_matrix == w->desired_matrix | |
2481 | && !window_row->enabled_p) | |
2482 | { | |
2483 | window_row = w->current_matrix->rows + window_y; | |
2484 | current_row_p = 1; | |
2485 | } | |
177c0ea7 | 2486 | |
2a8bd25f | 2487 | if (current_row_p) |
5f5c8ee5 | 2488 | { |
2a8bd25f | 2489 | /* Copy window row to frame row. */ |
72af86bd AS |
2490 | memcpy (frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, |
2491 | window_row->glyphs[0], | |
2492 | window_matrix->matrix_w * sizeof (struct glyph)); | |
5f5c8ee5 GM |
2493 | } |
2494 | else | |
2495 | { | |
a54e2c05 | 2496 | eassert (window_row->enabled_p); |
177c0ea7 | 2497 | |
2a8bd25f GM |
2498 | /* Only when a desired row has been displayed, we want |
2499 | the corresponding frame row to be updated. */ | |
2500 | frame_row->enabled_p = 1; | |
177c0ea7 | 2501 | |
5f5c8ee5 GM |
2502 | /* Maybe insert a vertical border between horizontally adjacent |
2503 | windows. */ | |
3fc809e2 | 2504 | if (GLYPH_CHAR (right_border_glyph) != 0) |
5f5c8ee5 GM |
2505 | { |
2506 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2507 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2508 | } | |
2509 | ||
e509cfa6 | 2510 | #ifdef GLYPH_DEBUG |
a13396c9 GM |
2511 | /* Window row window_y must be a slice of frame row |
2512 | frame_y. */ | |
a54e2c05 | 2513 | eassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2514 | |
5f5c8ee5 GM |
2515 | /* If rows are in sync, we don't have to copy glyphs because |
2516 | frame and window share glyphs. */ | |
177c0ea7 | 2517 | |
a38634ff | 2518 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2519 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2520 | #endif |
5f5c8ee5 GM |
2521 | } |
2522 | ||
2523 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2524 | up with spaces, and visit leaf windows from left to right it | |
2525 | can be done simply. */ | |
177c0ea7 | 2526 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2527 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2528 | ||
5f5c8ee5 GM |
2529 | /* Next row. */ |
2530 | ++window_y; | |
2531 | ++frame_y; | |
2532 | } | |
2533 | } | |
2534 | ||
5f81871e RS |
2535 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2536 | ID, return a glyph that has a realized face ID. | |
2537 | This is used for glyphs displayed specially and not part of the text; | |
2538 | for instance, vertical separators, truncation markers, etc. */ | |
2539 | ||
3fc809e2 | 2540 | void |
971de7fb | 2541 | spec_glyph_lookup_face (struct window *w, GLYPH *glyph) |
5f81871e | 2542 | { |
3fc809e2 | 2543 | int lface_id = GLYPH_FACE (*glyph); |
5f81871e RS |
2544 | /* Convert the glyph's specified face to a realized (cache) face. */ |
2545 | if (lface_id > 0) | |
2546 | { | |
d3d50620 | 2547 | int face_id = merge_faces (XFRAME (w->frame), |
5f81871e | 2548 | Qt, lface_id, DEFAULT_FACE_ID); |
3fc809e2 | 2549 | SET_GLYPH_FACE (*glyph, face_id); |
5f81871e | 2550 | } |
5f81871e | 2551 | } |
5f5c8ee5 GM |
2552 | |
2553 | /* Add spaces to a glyph row ROW in a window matrix. | |
2554 | ||
2555 | Each row has the form: | |
2556 | ||
2557 | +---------+-----------------------------+------------+ | |
2558 | | left | text | right | | |
2559 | +---------+-----------------------------+------------+ | |
2560 | ||
2561 | Left and right marginal areas are optional. This function adds | |
2562 | spaces to areas so that there are no empty holes between areas. | |
2563 | In other words: If the right area is not empty, the text area | |
2564 | is filled up with spaces up to the right area. If the text area | |
2565 | is not empty, the left area is filled up. | |
2566 | ||
2567 | To be called for frame-based redisplay, only. */ | |
2568 | ||
2569 | static void | |
971de7fb | 2570 | fill_up_glyph_row_with_spaces (struct glyph_row *row) |
5f5c8ee5 GM |
2571 | { |
2572 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2573 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2574 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2575 | } | |
2576 | ||
2577 | ||
2578 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2579 | frame-based redisplay only. */ | |
2580 | ||
2581 | static void | |
971de7fb | 2582 | fill_up_glyph_row_area_with_spaces (struct glyph_row *row, int area) |
5f5c8ee5 GM |
2583 | { |
2584 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2585 | { | |
2586 | struct glyph *end = row->glyphs[area + 1]; | |
2587 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2588 | ||
2589 | while (text < end) | |
2590 | *text++ = space_glyph; | |
2591 | row->used[area] = text - row->glyphs[area]; | |
2592 | } | |
2593 | } | |
2594 | ||
2595 | ||
2596 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2597 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2598 | ||
2599 | static void | |
971de7fb | 2600 | fill_up_frame_row_with_spaces (struct glyph_row *row, int upto) |
5f5c8ee5 GM |
2601 | { |
2602 | int i = row->used[TEXT_AREA]; | |
2603 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2604 | |
5f5c8ee5 GM |
2605 | while (i < upto) |
2606 | glyph[i++] = space_glyph; | |
2607 | ||
2608 | row->used[TEXT_AREA] = i; | |
2609 | } | |
2610 | ||
2611 | ||
2612 | \f | |
2613 | /********************************************************************** | |
2614 | Mirroring operations on frame matrices in window matrices | |
2615 | **********************************************************************/ | |
2616 | ||
2617 | /* Set frame being updated via frame-based redisplay to F. This | |
2618 | function must be called before updates to make explicit that we are | |
2619 | working on frame matrices or not. */ | |
2620 | ||
b0ab8123 | 2621 | static void |
971de7fb | 2622 | set_frame_matrix_frame (struct frame *f) |
5f5c8ee5 GM |
2623 | { |
2624 | frame_matrix_frame = f; | |
2625 | } | |
2626 | ||
2627 | ||
2628 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2629 | DESIRED_MATRIX is the desired matrix corresponding to | |
2630 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2631 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2632 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2633 | done in frame matrices, and that we have to perform analogous | |
2634 | operations in window matrices of frame_matrix_frame. */ | |
2635 | ||
b0ab8123 | 2636 | static void |
971de7fb | 2637 | make_current (struct glyph_matrix *desired_matrix, struct glyph_matrix *current_matrix, int row) |
5f5c8ee5 GM |
2638 | { |
2639 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2640 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
59ea14cd | 2641 | bool mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2642 | |
2643 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2644 | between both rows, and does a structure assignment otherwise. */ | |
2645 | assign_row (current_row, desired_row); | |
2646 | ||
2647 | /* Enable current_row to mark it as valid. */ | |
2648 | current_row->enabled_p = 1; | |
e876ff42 | 2649 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2650 | |
2651 | /* If we are called on frame matrices, perform analogous operations | |
2652 | for window matrices. */ | |
2653 | if (frame_matrix_frame) | |
e69b0960 | 2654 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); |
5f5c8ee5 GM |
2655 | } |
2656 | ||
2657 | ||
2658 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2659 | W's frame which has been made current (by swapping pointers between | |
2660 | current and desired matrix). Perform analogous operations in the | |
2661 | matrices of leaf windows in the window tree rooted at W. */ | |
2662 | ||
2663 | static void | |
971de7fb | 2664 | mirror_make_current (struct window *w, int frame_row) |
5f5c8ee5 GM |
2665 | { |
2666 | while (w) | |
2667 | { | |
d3d50620 DA |
2668 | if (!NILP (w->hchild)) |
2669 | mirror_make_current (XWINDOW (w->hchild), frame_row); | |
2670 | else if (!NILP (w->vchild)) | |
2671 | mirror_make_current (XWINDOW (w->vchild), frame_row); | |
5f5c8ee5 GM |
2672 | else |
2673 | { | |
2674 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2675 | here because the checks performed in debug mode there | |
2676 | will not allow the conversion. */ | |
2677 | int row = frame_row - w->desired_matrix->matrix_y; | |
2678 | ||
2679 | /* If FRAME_ROW is within W, assign the desired row to the | |
2680 | current row (exchanging glyph pointers). */ | |
2681 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
2682 | { | |
2683 | struct glyph_row *current_row | |
2684 | = MATRIX_ROW (w->current_matrix, row); | |
2685 | struct glyph_row *desired_row | |
2686 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
2687 | |
2688 | if (desired_row->enabled_p) | |
2689 | assign_row (current_row, desired_row); | |
2690 | else | |
2691 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 | 2692 | current_row->enabled_p = 1; |
d009ae66 EZ |
2693 | |
2694 | /* Set the Y coordinate of the mode/header line's row. | |
2695 | It is needed in draw_row_with_mouse_face to find the | |
2696 | screen coordinates. (Window-based redisplay sets | |
2697 | this in update_window, but no one seems to do that | |
2698 | for frame-based redisplay.) */ | |
2699 | if (current_row->mode_line_p) | |
2700 | current_row->y = row; | |
5f5c8ee5 GM |
2701 | } |
2702 | } | |
177c0ea7 | 2703 | |
d3d50620 | 2704 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2705 | } |
2706 | } | |
2707 | ||
2708 | ||
2709 | /* Perform row dance after scrolling. We are working on the range of | |
2710 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
2711 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
2712 | row I in the range 0 <= I < NLINES, the index of the original line | |
2713 | to move to I. This index is relative to the row range, i.e. 0 <= | |
2714 | index < NLINES. RETAINED_P is a vector containing zero for each | |
2715 | row 0 <= I < NLINES which is empty. | |
2716 | ||
2717 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 2718 | |
5f5c8ee5 | 2719 | void |
6f704c76 DN |
2720 | mirrored_line_dance (struct glyph_matrix *matrix, int unchanged_at_top, int nlines, |
2721 | int *copy_from, char *retained_p) | |
5f5c8ee5 GM |
2722 | { |
2723 | /* A copy of original rows. */ | |
2724 | struct glyph_row *old_rows; | |
2725 | ||
2726 | /* Rows to assign to. */ | |
2727 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 2728 | |
5f5c8ee5 GM |
2729 | int i; |
2730 | ||
2731 | /* Make a copy of the original rows. */ | |
38182d90 | 2732 | old_rows = alloca (nlines * sizeof *old_rows); |
72af86bd | 2733 | memcpy (old_rows, new_rows, nlines * sizeof *old_rows); |
5f5c8ee5 GM |
2734 | |
2735 | /* Assign new rows, maybe clear lines. */ | |
2736 | for (i = 0; i < nlines; ++i) | |
2737 | { | |
59ea14cd | 2738 | bool enabled_before_p = new_rows[i].enabled_p; |
5f5c8ee5 | 2739 | |
a54e2c05 DA |
2740 | eassert (i + unchanged_at_top < matrix->nrows); |
2741 | eassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
5f5c8ee5 GM |
2742 | new_rows[i] = old_rows[copy_from[i]]; |
2743 | new_rows[i].enabled_p = enabled_before_p; | |
2744 | ||
2745 | /* RETAINED_P is zero for empty lines. */ | |
2746 | if (!retained_p[copy_from[i]]) | |
2747 | new_rows[i].enabled_p = 0; | |
2748 | } | |
2749 | ||
153a073c | 2750 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 | 2751 | if (frame_matrix_frame) |
e69b0960 | 2752 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), |
5f5c8ee5 GM |
2753 | unchanged_at_top, nlines, copy_from, retained_p); |
2754 | } | |
2755 | ||
2756 | ||
a13396c9 | 2757 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 2758 | the current frame matrix. */ |
a13396c9 GM |
2759 | |
2760 | static void | |
971de7fb | 2761 | sync_window_with_frame_matrix_rows (struct window *w) |
a13396c9 | 2762 | { |
d3d50620 | 2763 | struct frame *f = XFRAME (w->frame); |
a13396c9 | 2764 | struct glyph_row *window_row, *window_row_end, *frame_row; |
075c507b | 2765 | int left, right, x, width; |
a13396c9 | 2766 | |
5cb88111 | 2767 | /* Preconditions: W must be a leaf window on a tty frame. */ |
d3d50620 | 2768 | eassert (NILP (w->hchild) && NILP (w->vchild)); |
a54e2c05 | 2769 | eassert (!FRAME_WINDOW_P (f)); |
a13396c9 | 2770 | |
d3d50620 DA |
2771 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
2772 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
2773 | x = w->current_matrix->matrix_x; |
2774 | width = w->current_matrix->matrix_w; | |
2775 | ||
a13396c9 GM |
2776 | window_row = w->current_matrix->rows; |
2777 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 2778 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 2779 | |
5cb88111 | 2780 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 2781 | { |
5cb88111 GM |
2782 | window_row->glyphs[LEFT_MARGIN_AREA] |
2783 | = frame_row->glyphs[0] + x; | |
2784 | window_row->glyphs[TEXT_AREA] | |
2785 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
2786 | window_row->glyphs[LAST_AREA] | |
2787 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
2788 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
2789 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
2790 | } |
2791 | } | |
2792 | ||
2793 | ||
2794 | /* Return the window in the window tree rooted in W containing frame | |
2795 | row ROW. Value is null if none is found. */ | |
2796 | ||
09ad5a91 | 2797 | static struct window * |
971de7fb | 2798 | frame_row_to_window (struct window *w, int row) |
a13396c9 GM |
2799 | { |
2800 | struct window *found = NULL; | |
177c0ea7 | 2801 | |
a13396c9 GM |
2802 | while (w && !found) |
2803 | { | |
d3d50620 DA |
2804 | if (!NILP (w->hchild)) |
2805 | found = frame_row_to_window (XWINDOW (w->hchild), row); | |
2806 | else if (!NILP (w->vchild)) | |
2807 | found = frame_row_to_window (XWINDOW (w->vchild), row); | |
7df02016 KS |
2808 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
2809 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 2810 | found = w; |
177c0ea7 | 2811 | |
d3d50620 | 2812 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
a13396c9 GM |
2813 | } |
2814 | ||
2815 | return found; | |
2816 | } | |
2817 | ||
2818 | ||
5f5c8ee5 GM |
2819 | /* Perform a line dance in the window tree rooted at W, after |
2820 | scrolling a frame matrix in mirrored_line_dance. | |
2821 | ||
2822 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
2823 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
2824 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
2825 | I < NLINES, the index of the original line to move to I. This | |
2826 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
2827 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
2828 | which is empty. */ | |
2829 | ||
2830 | static void | |
971de7fb | 2831 | mirror_line_dance (struct window *w, int unchanged_at_top, int nlines, int *copy_from, char *retained_p) |
5f5c8ee5 GM |
2832 | { |
2833 | while (w) | |
2834 | { | |
d3d50620 DA |
2835 | if (!NILP (w->hchild)) |
2836 | mirror_line_dance (XWINDOW (w->hchild), unchanged_at_top, | |
5f5c8ee5 | 2837 | nlines, copy_from, retained_p); |
d3d50620 DA |
2838 | else if (!NILP (w->vchild)) |
2839 | mirror_line_dance (XWINDOW (w->vchild), unchanged_at_top, | |
5f5c8ee5 GM |
2840 | nlines, copy_from, retained_p); |
2841 | else | |
2842 | { | |
2843 | /* W is a leaf window, and we are working on its current | |
2844 | matrix m. */ | |
2845 | struct glyph_matrix *m = w->current_matrix; | |
59ea14cd PE |
2846 | int i; |
2847 | bool sync_p = 0; | |
5f5c8ee5 GM |
2848 | struct glyph_row *old_rows; |
2849 | ||
2850 | /* Make a copy of the original rows of matrix m. */ | |
38182d90 | 2851 | old_rows = alloca (m->nrows * sizeof *old_rows); |
72af86bd | 2852 | memcpy (old_rows, m->rows, m->nrows * sizeof *old_rows); |
5f5c8ee5 GM |
2853 | |
2854 | for (i = 0; i < nlines; ++i) | |
2855 | { | |
2856 | /* Frame relative line assigned to. */ | |
2857 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 2858 | |
5f5c8ee5 GM |
2859 | /* Frame relative line assigned. */ |
2860 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 2861 | |
5f5c8ee5 GM |
2862 | /* Window relative line assigned to. */ |
2863 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 2864 | |
5f5c8ee5 GM |
2865 | /* Window relative line assigned. */ |
2866 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 2867 | |
5f5c8ee5 | 2868 | /* Is assigned line inside window? */ |
59ea14cd | 2869 | bool from_inside_window_p |
5f5c8ee5 | 2870 | = window_from >= 0 && window_from < m->matrix_h; |
177c0ea7 | 2871 | |
a13396c9 | 2872 | /* Is assigned to line inside window? */ |
59ea14cd | 2873 | bool to_inside_window_p |
a13396c9 | 2874 | = window_to >= 0 && window_to < m->matrix_h; |
177c0ea7 | 2875 | |
a13396c9 | 2876 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 2877 | { |
5f5c8ee5 GM |
2878 | /* Do the assignment. The enabled_p flag is saved |
2879 | over the assignment because the old redisplay did | |
2880 | that. */ | |
59ea14cd | 2881 | bool enabled_before_p = m->rows[window_to].enabled_p; |
5f5c8ee5 GM |
2882 | m->rows[window_to] = old_rows[window_from]; |
2883 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 2884 | |
5f5c8ee5 GM |
2885 | /* If frame line is empty, window line is empty, too. */ |
2886 | if (!retained_p[copy_from[i]]) | |
2887 | m->rows[window_to].enabled_p = 0; | |
2888 | } | |
a13396c9 GM |
2889 | else if (to_inside_window_p) |
2890 | { | |
2891 | /* A copy between windows. This is an infrequent | |
2892 | case not worth optimizing. */ | |
d3d50620 | 2893 | struct frame *f = XFRAME (w->frame); |
a13396c9 GM |
2894 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
2895 | struct window *w2; | |
2896 | struct glyph_matrix *m2; | |
2897 | int m2_from; | |
2898 | ||
fe8b8401 | 2899 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
2900 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
2901 | -nw', FROM_FRAME sometimes has no associated window. | |
2902 | This check avoids a segfault if W2 is null. */ | |
2903 | if (w2) | |
2904 | { | |
2905 | m2 = w2->current_matrix; | |
2906 | m2_from = frame_from - m2->matrix_y; | |
2907 | copy_row_except_pointers (m->rows + window_to, | |
2908 | m2->rows + m2_from); | |
2909 | ||
2910 | /* If frame line is empty, window line is empty, too. */ | |
2911 | if (!retained_p[copy_from[i]]) | |
2912 | m->rows[window_to].enabled_p = 0; | |
2913 | } | |
a13396c9 GM |
2914 | sync_p = 1; |
2915 | } | |
2916 | else if (from_inside_window_p) | |
2917 | sync_p = 1; | |
5f5c8ee5 | 2918 | } |
a13396c9 GM |
2919 | |
2920 | /* If there was a copy between windows, make sure glyph | |
2921 | pointers are in sync with the frame matrix. */ | |
2922 | if (sync_p) | |
2923 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 2924 | |
5f5c8ee5 GM |
2925 | /* Check that no pointers are lost. */ |
2926 | CHECK_MATRIX (m); | |
2927 | } | |
2928 | ||
2929 | /* Next window on same level. */ | |
d3d50620 | 2930 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2931 | } |
2932 | } | |
2933 | ||
2934 | ||
e509cfa6 | 2935 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
2936 | |
2937 | /* Check that window and frame matrices agree about their | |
2938 | understanding where glyphs of the rows are to find. For each | |
2939 | window in the window tree rooted at W, check that rows in the | |
2940 | matrices of leaf window agree with their frame matrices about | |
2941 | glyph pointers. */ | |
2942 | ||
85fece3e | 2943 | static void |
59fc5cf9 | 2944 | check_window_matrix_pointers (struct window *w) |
5f5c8ee5 GM |
2945 | { |
2946 | while (w) | |
2947 | { | |
d3d50620 DA |
2948 | if (!NILP (w->hchild)) |
2949 | check_window_matrix_pointers (XWINDOW (w->hchild)); | |
2950 | else if (!NILP (w->vchild)) | |
2951 | check_window_matrix_pointers (XWINDOW (w->vchild)); | |
5f5c8ee5 | 2952 | else |
60a8948a | 2953 | { |
d3d50620 | 2954 | struct frame *f = XFRAME (w->frame); |
5f5c8ee5 GM |
2955 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); |
2956 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 2957 | } |
177c0ea7 | 2958 | |
d3d50620 | 2959 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2960 | } |
2961 | } | |
2962 | ||
2963 | ||
2964 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
2965 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
2966 | each row in WINDOW_MATRIX check that it's a slice of the | |
2967 | corresponding frame row. If it isn't, abort. */ | |
2968 | ||
2969 | static void | |
59fc5cf9 AS |
2970 | check_matrix_pointers (struct glyph_matrix *window_matrix, |
2971 | struct glyph_matrix *frame_matrix) | |
5f5c8ee5 GM |
2972 | { |
2973 | /* Row number in WINDOW_MATRIX. */ | |
2974 | int i = 0; | |
2975 | ||
2976 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
2977 | int j = window_matrix->matrix_y; | |
2978 | ||
177c0ea7 | 2979 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
2980 | slice of the row in the frame matrix. If it isn't we didn't |
2981 | mirror an operation on the frame matrix correctly. */ | |
2982 | while (i < window_matrix->nrows) | |
2983 | { | |
2984 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
2985 | frame_matrix->rows + j)) | |
1088b922 | 2986 | emacs_abort (); |
5f5c8ee5 GM |
2987 | ++i, ++j; |
2988 | } | |
2989 | } | |
2990 | ||
e509cfa6 | 2991 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
2992 | |
2993 | ||
2994 | \f | |
2995 | /********************************************************************** | |
2996 | VPOS and HPOS translations | |
2997 | **********************************************************************/ | |
2998 | ||
e509cfa6 | 2999 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
3000 | |
3001 | /* Translate vertical position VPOS which is relative to window W to a | |
3002 | vertical position relative to W's frame. */ | |
3003 | ||
3004 | static int | |
59fc5cf9 | 3005 | window_to_frame_vpos (struct window *w, int vpos) |
5f5c8ee5 | 3006 | { |
d3d50620 | 3007 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
a54e2c05 | 3008 | eassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); |
7df02016 | 3009 | vpos += WINDOW_TOP_EDGE_LINE (w); |
d3d50620 | 3010 | eassert (vpos >= 0 && vpos <= FRAME_LINES (XFRAME (w->frame))); |
5f5c8ee5 GM |
3011 | return vpos; |
3012 | } | |
3013 | ||
3014 | ||
3015 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 3016 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
3017 | |
3018 | static int | |
59fc5cf9 | 3019 | window_to_frame_hpos (struct window *w, int hpos) |
5f5c8ee5 | 3020 | { |
d3d50620 | 3021 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 3022 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
3023 | return hpos; |
3024 | } | |
177c0ea7 | 3025 | |
5f5c8ee5 GM |
3026 | #endif /* GLYPH_DEBUG */ |
3027 | ||
3028 | ||
3029 | \f | |
3030 | /********************************************************************** | |
3031 | Redrawing Frames | |
3032 | **********************************************************************/ | |
3033 | ||
2a14f83b | 3034 | /* Redraw frame F. */ |
5f5c8ee5 | 3035 | |
2a14f83b DA |
3036 | void |
3037 | redraw_frame (struct frame *f) | |
3038 | { | |
3039 | /* Error if F has no glyphs. */ | |
3040 | eassert (f->glyphs_initialized_p); | |
5f5c8ee5 | 3041 | update_begin (f); |
3224dac1 | 3042 | #ifdef MSDOS |
f2adda5e | 3043 | if (FRAME_MSDOS_P (f)) |
79d39b69 | 3044 | FRAME_TERMINAL (f)->set_terminal_modes_hook (FRAME_TERMINAL (f)); |
3224dac1 | 3045 | #endif |
385ed61f | 3046 | clear_frame (f); |
5f5c8ee5 GM |
3047 | clear_current_matrices (f); |
3048 | update_end (f); | |
daf01701 | 3049 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3050 | fflush (FRAME_TTY (f)->output); |
5f5c8ee5 GM |
3051 | windows_or_buffers_changed++; |
3052 | /* Mark all windows as inaccurate, so that every window will have | |
3053 | its redisplay done. */ | |
3054 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
3055 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
3056 | f->garbaged = 0; | |
5f5c8ee5 GM |
3057 | } |
3058 | ||
2a14f83b DA |
3059 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 0, 1, 0, |
3060 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. | |
3061 | If FRAME is omitted or nil, the selected frame is used. */) | |
3062 | (Lisp_Object frame) | |
5f5c8ee5 | 3063 | { |
2a14f83b DA |
3064 | redraw_frame (decode_live_frame (frame)); |
3065 | return Qnil; | |
5f5c8ee5 GM |
3066 | } |
3067 | ||
5f5c8ee5 | 3068 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", |
7ee72033 | 3069 | doc: /* Clear and redisplay all visible frames. */) |
5842a27b | 3070 | (void) |
5f5c8ee5 GM |
3071 | { |
3072 | Lisp_Object tail, frame; | |
3073 | ||
3074 | FOR_EACH_FRAME (tail, frame) | |
3075 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
2a14f83b | 3076 | redraw_frame (XFRAME (frame)); |
5f5c8ee5 GM |
3077 | |
3078 | return Qnil; | |
3079 | } | |
3080 | ||
3081 | ||
5f5c8ee5 | 3082 | \f |
5f5c8ee5 GM |
3083 | /*********************************************************************** |
3084 | Frame Update | |
3085 | ***********************************************************************/ | |
4588ec20 | 3086 | |
5f5c8ee5 | 3087 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 3088 | |
59ea14cd PE |
3089 | If FORCE_P, don't let redisplay be stopped by detecting pending input. |
3090 | If INHIBIT_HAIRY_ID_P, don't try scrolling. | |
177c0ea7 | 3091 | |
59ea14cd | 3092 | Value is true if redisplay was stopped due to pending input. */ |
4588ec20 | 3093 | |
59ea14cd PE |
3094 | bool |
3095 | update_frame (struct frame *f, bool force_p, bool inhibit_hairy_id_p) | |
5f5c8ee5 | 3096 | { |
59ea14cd PE |
3097 | /* True means display has been paused because of pending input. */ |
3098 | bool paused_p; | |
e69b0960 | 3099 | struct window *root_window = XWINDOW (f->root_window); |
5f5c8ee5 | 3100 | |
a2130dbb KS |
3101 | if (redisplay_dont_pause) |
3102 | force_p = 1; | |
a2130dbb KS |
3103 | else if (NILP (Vredisplay_preemption_period)) |
3104 | force_p = 1; | |
3105 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b | 3106 | { |
d012c62b | 3107 | double p = XFLOATINT (Vredisplay_preemption_period); |
d012c62b | 3108 | |
993d4ab6 KS |
3109 | if (detect_input_pending_ignore_squeezables ()) |
3110 | { | |
3111 | paused_p = 1; | |
3112 | goto do_pause; | |
3113 | } | |
3114 | ||
d35af63c | 3115 | preemption_period = EMACS_TIME_FROM_DOUBLE (p); |
e9a9ae03 PE |
3116 | preemption_next_check = add_emacs_time (current_emacs_time (), |
3117 | preemption_period); | |
d012c62b | 3118 | } |
d012c62b | 3119 | |
5f5c8ee5 | 3120 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3121 | { |
5f5c8ee5 GM |
3122 | /* We are working on window matrix basis. All windows whose |
3123 | flag must_be_updated_p is set have to be updated. */ | |
3124 | ||
3125 | /* Record that we are not working on frame matrices. */ | |
3126 | set_frame_matrix_frame (NULL); | |
3127 | ||
3128 | /* Update all windows in the window tree of F, maybe stopping | |
3129 | when pending input is detected. */ | |
3130 | update_begin (f); | |
3131 | ||
3132 | /* Update the menu bar on X frames that don't have toolkit | |
3133 | support. */ | |
e69b0960 DA |
3134 | if (WINDOWP (f->menu_bar_window)) |
3135 | update_window (XWINDOW (f->menu_bar_window), 1); | |
5f5c8ee5 GM |
3136 | |
3137 | /* Update the tool-bar window, if present. */ | |
e69b0960 | 3138 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3139 | { |
e69b0960 | 3140 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3141 | |
3142 | /* Update tool-bar window. */ | |
3143 | if (w->must_be_updated_p) | |
4588ec20 | 3144 | { |
153a073c PJ |
3145 | Lisp_Object tem; |
3146 | ||
5f5c8ee5 GM |
3147 | update_window (w, 1); |
3148 | w->must_be_updated_p = 0; | |
3149 | ||
3150 | /* Swap tool-bar strings. We swap because we want to | |
3151 | reuse strings. */ | |
e69b0960 | 3152 | tem = f->current_tool_bar_string; |
f00af5b1 PE |
3153 | fset_current_tool_bar_string (f, f->desired_tool_bar_string); |
3154 | fset_desired_tool_bar_string (f, tem); | |
4588ec20 JB |
3155 | } |
3156 | } | |
177c0ea7 | 3157 | |
5f5c8ee5 GM |
3158 | |
3159 | /* Update windows. */ | |
3160 | paused_p = update_window_tree (root_window, force_p); | |
3161 | update_end (f); | |
177c0ea7 | 3162 | |
6b61353c | 3163 | /* This flush is a performance bottleneck under X, |
e581a466 | 3164 | and it doesn't seem to be necessary anyway (in general). |
6b61353c | 3165 | It is necessary when resizing the window with the mouse, or |
e581a466 | 3166 | at least the fringes are not redrawn in a timely manner. ++kfs */ |
6b61353c | 3167 | if (f->force_flush_display_p) |
e581a466 KL |
3168 | { |
3169 | FRAME_RIF (f)->flush_display (f); | |
3170 | f->force_flush_display_p = 0; | |
3171 | } | |
4588ec20 | 3172 | } |
5f5c8ee5 GM |
3173 | else |
3174 | { | |
3175 | /* We are working on frame matrix basis. Set the frame on whose | |
3176 | frame matrix we operate. */ | |
3177 | set_frame_matrix_frame (f); | |
3178 | ||
868dd24b | 3179 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3180 | build_frame_matrix (f); |
177c0ea7 | 3181 | |
868dd24b GM |
3182 | /* Update the display */ |
3183 | update_begin (f); | |
5f5c8ee5 | 3184 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3185 | update_end (f); |
3186 | ||
7d2f1216 | 3187 | if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f)) |
3224dac1 | 3188 | { |
0b0d3e0b KL |
3189 | if (FRAME_TTY (f)->termscript) |
3190 | fflush (FRAME_TTY (f)->termscript); | |
7d2f1216 EZ |
3191 | if (FRAME_TERMCAP_P (f)) |
3192 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3193 | } |
868dd24b | 3194 | |
5f5c8ee5 | 3195 | /* Check window matrices for lost pointers. */ |
e509cfa6 | 3196 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
3197 | check_window_matrix_pointers (root_window); |
3198 | add_frame_display_history (f, paused_p); | |
3199 | #endif | |
5f5c8ee5 GM |
3200 | } |
3201 | ||
993d4ab6 | 3202 | do_pause: |
5f5c8ee5 GM |
3203 | /* Reset flags indicating that a window should be updated. */ |
3204 | set_window_update_flags (root_window, 0); | |
177c0ea7 | 3205 | |
868dd24b | 3206 | display_completed = !paused_p; |
5f5c8ee5 | 3207 | return paused_p; |
4588ec20 | 3208 | } |
5f5c8ee5 GM |
3209 | |
3210 | ||
4588ec20 | 3211 | \f |
5f5c8ee5 GM |
3212 | /************************************************************************ |
3213 | Window-based updates | |
3214 | ************************************************************************/ | |
3215 | ||
59ea14cd PE |
3216 | /* Perform updates in window tree rooted at W. |
3217 | If FORCE_P, don't stop updating if input is pending. */ | |
5f5c8ee5 | 3218 | |
59ea14cd PE |
3219 | static bool |
3220 | update_window_tree (struct window *w, bool force_p) | |
5f5c8ee5 | 3221 | { |
59ea14cd | 3222 | bool paused_p = 0; |
177c0ea7 | 3223 | |
5f5c8ee5 GM |
3224 | while (w && !paused_p) |
3225 | { | |
d3d50620 DA |
3226 | if (!NILP (w->hchild)) |
3227 | paused_p |= update_window_tree (XWINDOW (w->hchild), force_p); | |
3228 | else if (!NILP (w->vchild)) | |
3229 | paused_p |= update_window_tree (XWINDOW (w->vchild), force_p); | |
5f5c8ee5 GM |
3230 | else if (w->must_be_updated_p) |
3231 | paused_p |= update_window (w, force_p); | |
3232 | ||
d3d50620 | 3233 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
3234 | } |
3235 | ||
3236 | return paused_p; | |
3237 | } | |
3238 | ||
3239 | ||
59ea14cd PE |
3240 | /* Update window W if its flag must_be_updated_p is set. |
3241 | If FORCE_P, don't stop updating if input is pending. */ | |
5f5c8ee5 GM |
3242 | |
3243 | void | |
59ea14cd | 3244 | update_single_window (struct window *w, bool force_p) |
5f5c8ee5 GM |
3245 | { |
3246 | if (w->must_be_updated_p) | |
3247 | { | |
3248 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
3249 | ||
3250 | /* Record that this is not a frame-based redisplay. */ | |
3251 | set_frame_matrix_frame (NULL); | |
3252 | ||
a2130dbb KS |
3253 | if (redisplay_dont_pause) |
3254 | force_p = 1; | |
a2130dbb KS |
3255 | else if (NILP (Vredisplay_preemption_period)) |
3256 | force_p = 1; | |
3257 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b | 3258 | { |
d012c62b | 3259 | double p = XFLOATINT (Vredisplay_preemption_period); |
d35af63c | 3260 | preemption_period = EMACS_TIME_FROM_DOUBLE (p); |
e9a9ae03 PE |
3261 | preemption_next_check = add_emacs_time (current_emacs_time (), |
3262 | preemption_period); | |
d012c62b | 3263 | } |
d012c62b | 3264 | |
5f5c8ee5 GM |
3265 | /* Update W. */ |
3266 | update_begin (f); | |
3267 | update_window (w, force_p); | |
3268 | update_end (f); | |
4588ec20 | 3269 | |
5f5c8ee5 GM |
3270 | /* Reset flag in W. */ |
3271 | w->must_be_updated_p = 0; | |
3272 | } | |
3273 | } | |
4588ec20 | 3274 | |
93e023fc | 3275 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 3276 | |
408f5064 GM |
3277 | /* Redraw lines from the current matrix of window W that are |
3278 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
3279 | ||
3280 | static void | |
971de7fb | 3281 | redraw_overlapped_rows (struct window *w, int yb) |
408f5064 | 3282 | { |
d8ee7803 | 3283 | int i; |
fa971ac3 | 3284 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3fc809e2 | 3285 | |
408f5064 GM |
3286 | /* If rows overlapping others have been changed, the rows being |
3287 | overlapped have to be redrawn. This won't draw lines that have | |
3288 | already been drawn in update_window_line because overlapped_p in | |
3289 | desired rows is 0, so after row assignment overlapped_p in | |
3290 | current rows is 0. */ | |
3291 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
3292 | { | |
e876ff42 | 3293 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
3294 | |
3295 | if (!row->enabled_p) | |
3296 | break; | |
3297 | else if (row->mode_line_p) | |
3298 | continue; | |
177c0ea7 | 3299 | |
408f5064 GM |
3300 | if (row->overlapped_p) |
3301 | { | |
3302 | enum glyph_row_area area; | |
177c0ea7 | 3303 | |
408f5064 GM |
3304 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
3305 | { | |
3306 | updated_row = row; | |
3307 | updated_area = area; | |
fa971ac3 KL |
3308 | FRAME_RIF (f)->cursor_to (i, 0, row->y, |
3309 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 3310 | if (row->used[area]) |
fa971ac3 KL |
3311 | FRAME_RIF (f)->write_glyphs (row->glyphs[area], |
3312 | row->used[area]); | |
3313 | FRAME_RIF (f)->clear_end_of_line (-1); | |
408f5064 | 3314 | } |
177c0ea7 | 3315 | |
408f5064 GM |
3316 | row->overlapped_p = 0; |
3317 | } | |
3318 | ||
e876ff42 | 3319 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
3320 | break; |
3321 | } | |
3322 | } | |
3323 | ||
3324 | ||
3325 | /* Redraw lines from the current matrix of window W that overlap | |
3326 | others. YB is bottom-most y-position in W. */ | |
3327 | ||
3328 | static void | |
971de7fb | 3329 | redraw_overlapping_rows (struct window *w, int yb) |
408f5064 GM |
3330 | { |
3331 | int i, bottom_y; | |
3332 | struct glyph_row *row; | |
fa971ac3 | 3333 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
3fc809e2 | 3334 | |
408f5064 GM |
3335 | for (i = 0; i < w->current_matrix->nrows; ++i) |
3336 | { | |
3337 | row = w->current_matrix->rows + i; | |
3338 | ||
3339 | if (!row->enabled_p) | |
3340 | break; | |
3341 | else if (row->mode_line_p) | |
3342 | continue; | |
177c0ea7 | 3343 | |
408f5064 GM |
3344 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
3345 | ||
b4b2c2ca | 3346 | if (row->overlapping_p) |
408f5064 | 3347 | { |
41124e06 YM |
3348 | int overlaps = 0; |
3349 | ||
b4b2c2ca | 3350 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) && i > 0 |
41124e06 YM |
3351 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) |
3352 | overlaps |= OVERLAPS_PRED; | |
b4b2c2ca | 3353 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) && bottom_y < yb |
41124e06 YM |
3354 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) |
3355 | overlaps |= OVERLAPS_SUCC; | |
3356 | ||
3357 | if (overlaps) | |
3358 | { | |
3359 | if (row->used[LEFT_MARGIN_AREA]) | |
3360 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
3361 | ||
3362 | if (row->used[TEXT_AREA]) | |
3363 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
3364 | ||
3365 | if (row->used[RIGHT_MARGIN_AREA]) | |
3366 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
3367 | ||
c5e87d10 | 3368 | /* Record in neighbor rows that ROW overwrites part of |
41124e06 YM |
3369 | their display. */ |
3370 | if (overlaps & OVERLAPS_PRED) | |
3371 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
3372 | if (overlaps & OVERLAPS_SUCC) | |
3373 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
3374 | } | |
408f5064 GM |
3375 | } |
3376 | ||
3377 | if (bottom_y >= yb) | |
3378 | break; | |
3379 | } | |
3380 | } | |
3381 | ||
93e023fc KS |
3382 | #endif /* HAVE_WINDOW_SYSTEM */ |
3383 | ||
408f5064 | 3384 | |
09ad5a91 | 3385 | #if defined GLYPH_DEBUG && 0 |
93962bfa GM |
3386 | |
3387 | /* Check that no row in the current matrix of window W is enabled | |
3388 | which is below what's displayed in the window. */ | |
3389 | ||
09ad5a91 | 3390 | static void |
971de7fb | 3391 | check_current_matrix_flags (struct window *w) |
93962bfa | 3392 | { |
59ea14cd | 3393 | bool last_seen_p = 0; |
93962bfa GM |
3394 | int i, yb = window_text_bottom_y (w); |
3395 | ||
3396 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
3397 | { | |
3398 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
3399 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3400 | last_seen_p = 1; | |
3401 | else if (last_seen_p && row->enabled_p) | |
1088b922 | 3402 | emacs_abort (); |
93962bfa GM |
3403 | } |
3404 | } | |
3405 | ||
3406 | #endif /* GLYPH_DEBUG */ | |
3407 | ||
3408 | ||
59ea14cd PE |
3409 | /* Update display of window W. |
3410 | If FORCE_P, don't stop updating when input is pending. */ | |
5f5c8ee5 | 3411 | |
59ea14cd PE |
3412 | static bool |
3413 | update_window (struct window *w, bool force_p) | |
4588ec20 | 3414 | { |
5f5c8ee5 | 3415 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
59ea14cd | 3416 | bool paused_p; |
d012c62b | 3417 | #if !PERIODIC_PREEMPTION_CHECKING |
5f5c8ee5 | 3418 | int preempt_count = baud_rate / 2400 + 1; |
d012c62b | 3419 | #endif |
597cfb3f | 3420 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
e509cfa6 | 3421 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 3422 | /* Check that W's frame doesn't have glyph matrices. */ |
a54e2c05 | 3423 | eassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 3424 | #endif |
5f5c8ee5 GM |
3425 | |
3426 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb KS |
3427 | #if !PERIODIC_PREEMPTION_CHECKING |
3428 | if (!force_p) | |
a2d5fca0 | 3429 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3430 | #endif |
4588ec20 | 3431 | |
5f5c8ee5 GM |
3432 | /* If forced to complete the update, or if no input is pending, do |
3433 | the update. */ | |
8fd9a666 | 3434 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 3435 | { |
5f5c8ee5 GM |
3436 | struct glyph_row *row, *end; |
3437 | struct glyph_row *mode_line_row; | |
56974e03 | 3438 | struct glyph_row *header_line_row; |
59ea14cd PE |
3439 | int yb; |
3440 | bool changed_p = 0, mouse_face_overwritten_p = 0; | |
0bc32927 PE |
3441 | #if ! PERIODIC_PREEMPTION_CHECKING |
3442 | int n_updated = 0; | |
3443 | #endif | |
5f5c8ee5 GM |
3444 | |
3445 | rif->update_window_begin_hook (w); | |
3446 | yb = window_text_bottom_y (w); | |
5f5c8ee5 GM |
3447 | row = desired_matrix->rows; |
3448 | end = row + desired_matrix->nrows - 1; | |
177c0ea7 | 3449 | |
394305db EZ |
3450 | /* Take note of the header line, if there is one. We will |
3451 | update it below, after updating all of the window's lines. */ | |
5f5c8ee5 | 3452 | if (row->mode_line_p) |
56974e03 GM |
3453 | { |
3454 | header_line_row = row; | |
3455 | ++row; | |
3456 | } | |
3457 | else | |
3458 | header_line_row = NULL; | |
5f5c8ee5 GM |
3459 | |
3460 | /* Update the mode line, if necessary. */ | |
3461 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
3462 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
3463 | { | |
3464 | mode_line_row->y = yb; | |
3465 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
3466 | desired_matrix), |
3467 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3468 | } |
3469 | ||
3470 | /* Find first enabled row. Optimizations in redisplay_internal | |
3471 | may lead to an update with only one row enabled. There may | |
3472 | be also completely empty matrices. */ | |
3473 | while (row < end && !row->enabled_p) | |
3474 | ++row; | |
177c0ea7 | 3475 | |
bfdcafe1 | 3476 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 3477 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
3478 | { |
3479 | int rc = scrolling_window (w, header_line_row != NULL); | |
3480 | if (rc < 0) | |
3481 | { | |
3482 | /* All rows were found to be equal. */ | |
3483 | paused_p = 0; | |
3484 | goto set_cursor; | |
3485 | } | |
3486 | else if (rc > 0) | |
6b61353c KH |
3487 | { |
3488 | /* We've scrolled the display. */ | |
3489 | force_p = 1; | |
3490 | changed_p = 1; | |
3491 | } | |
5f5c8ee5 GM |
3492 | } |
3493 | ||
3494 | /* Update the rest of the lines. */ | |
0bc32927 | 3495 | for (; row < end && (force_p || !input_pending); ++row) |
394305db EZ |
3496 | /* scrolling_window resets the enabled_p flag of the rows it |
3497 | reuses from current_matrix. */ | |
b7412313 | 3498 | if (row->enabled_p) |
5f5c8ee5 GM |
3499 | { |
3500 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
3501 | int i; | |
177c0ea7 | 3502 | |
153a073c | 3503 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
3504 | detect_input_pending. If it's done too often, |
3505 | scrolling large windows with repeated scroll-up | |
3506 | commands will too quickly pause redisplay. */ | |
d012c62b KS |
3507 | #if PERIODIC_PREEMPTION_CHECKING |
3508 | if (!force_p) | |
3509 | { | |
e9a9ae03 | 3510 | EMACS_TIME tm = current_emacs_time (); |
d35af63c | 3511 | if (EMACS_TIME_LT (preemption_next_check, tm)) |
d012c62b | 3512 | { |
e9a9ae03 PE |
3513 | preemption_next_check = add_emacs_time (tm, |
3514 | preemption_period); | |
993d4ab6 KS |
3515 | if (detect_input_pending_ignore_squeezables ()) |
3516 | break; | |
d012c62b KS |
3517 | } |
3518 | } | |
3519 | #else | |
e87b8809 | 3520 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 3521 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3522 | #endif |
e876ff42 GM |
3523 | changed_p |= update_window_line (w, vpos, |
3524 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3525 | |
3526 | /* Mark all rows below the last visible one in the current | |
3527 | matrix as invalid. This is necessary because of | |
3528 | variable line heights. Consider the case of three | |
3529 | successive redisplays, where the first displays 5 | |
3530 | lines, the second 3 lines, and the third 5 lines again. | |
3531 | If the second redisplay wouldn't mark rows in the | |
3532 | current matrix invalid, the third redisplay might be | |
3533 | tempted to optimize redisplay based on lines displayed | |
3534 | in the first redisplay. */ | |
3535 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3536 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
3537 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
3538 | } | |
3539 | ||
3540 | /* Was display preempted? */ | |
3541 | paused_p = row < end; | |
177c0ea7 | 3542 | |
56974e03 | 3543 | set_cursor: |
177c0ea7 | 3544 | |
6b61353c KH |
3545 | /* Update the header line after scrolling because a new header |
3546 | line would otherwise overwrite lines at the top of the window | |
3547 | that can be scrolled. */ | |
3548 | if (header_line_row && header_line_row->enabled_p) | |
3549 | { | |
3550 | header_line_row->y = 0; | |
3551 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
6b61353c KH |
3552 | } |
3553 | ||
153a073c | 3554 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
3555 | if (!paused_p && !w->pseudo_window_p) |
3556 | { | |
93e023fc | 3557 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
3558 | if (changed_p && rif->fix_overlapping_area) |
3559 | { | |
3560 | redraw_overlapped_rows (w, yb); | |
3561 | redraw_overlapping_rows (w, yb); | |
3562 | } | |
93e023fc | 3563 | #endif |
177c0ea7 | 3564 | |
5f5c8ee5 GM |
3565 | /* Make cursor visible at cursor position of W. */ |
3566 | set_window_cursor_after_update (w); | |
3567 | ||
e876ff42 GM |
3568 | #if 0 /* Check that current matrix invariants are satisfied. This is |
3569 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
3570 | IF_DEBUG (check_matrix_invariants (w)); |
3571 | #endif | |
4588ec20 | 3572 | } |
5f5c8ee5 | 3573 | |
e509cfa6 | 3574 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
3575 | /* Remember the redisplay method used to display the matrix. */ |
3576 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
3577 | #endif | |
408f5064 | 3578 | |
6b61353c KH |
3579 | #ifdef HAVE_WINDOW_SYSTEM |
3580 | update_window_fringes (w, 0); | |
3581 | #endif | |
3582 | ||
56974e03 GM |
3583 | /* End the update of window W. Don't set the cursor if we |
3584 | paused updating the display because in this case, | |
3585 | set_window_cursor_after_update hasn't been called, and | |
3586 | output_cursor doesn't contain the cursor location. */ | |
3587 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); | |
4588ec20 | 3588 | } |
5f5c8ee5 GM |
3589 | else |
3590 | paused_p = 1; | |
3591 | ||
e509cfa6 | 3592 | #ifdef GLYPH_DEBUG |
0cffd9d8 | 3593 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
3594 | add_window_display_history (w, w->current_matrix->method, paused_p); |
3595 | #endif | |
177c0ea7 | 3596 | |
5f5c8ee5 | 3597 | clear_glyph_matrix (desired_matrix); |
408f5064 | 3598 | |
5f5c8ee5 | 3599 | return paused_p; |
4588ec20 JB |
3600 | } |
3601 | ||
b64b3980 | 3602 | |
5f5c8ee5 GM |
3603 | /* Update the display of area AREA in window W, row number VPOS. |
3604 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
3605 | ||
3606 | static void | |
971de7fb | 3607 | update_marginal_area (struct window *w, int area, int vpos) |
b64b3980 | 3608 | { |
5f5c8ee5 | 3609 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 3610 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
3611 | |
3612 | /* Let functions in xterm.c know what area subsequent X positions | |
3613 | will be relative to. */ | |
3614 | updated_area = area; | |
3615 | ||
3616 | /* Set cursor to start of glyphs, write them, and clear to the end | |
3617 | of the area. I don't think that something more sophisticated is | |
3618 | necessary here, since marginal areas will not be the default. */ | |
3619 | rif->cursor_to (vpos, 0, desired_row->y, 0); | |
3620 | if (desired_row->used[area]) | |
3621 | rif->write_glyphs (desired_row->glyphs[area], desired_row->used[area]); | |
3622 | rif->clear_end_of_line (-1); | |
b64b3980 | 3623 | } |
23b0200c | 3624 | |
352f1545 | 3625 | |
408f5064 | 3626 | /* Update the display of the text area of row VPOS in window W. |
59ea14cd | 3627 | Value is true if display has changed. */ |
5f5c8ee5 | 3628 | |
59ea14cd | 3629 | static bool |
971de7fb | 3630 | update_text_area (struct window *w, int vpos) |
23b0200c | 3631 | { |
5f5c8ee5 GM |
3632 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
3633 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3634 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
59ea14cd | 3635 | bool changed_p = 0; |
5f5c8ee5 GM |
3636 | |
3637 | /* Let functions in xterm.c know what area subsequent X positions | |
3638 | will be relative to. */ | |
3639 | updated_area = TEXT_AREA; | |
177c0ea7 | 3640 | |
5f5c8ee5 GM |
3641 | /* If rows are at different X or Y, or rows have different height, |
3642 | or the current row is marked invalid, write the entire line. */ | |
3643 | if (!current_row->enabled_p | |
3644 | || desired_row->y != current_row->y | |
3645 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
3646 | || desired_row->phys_ascent != current_row->phys_ascent |
3647 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 3648 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 3649 | || current_row->overlapped_p |
fee8b690 CY |
3650 | /* This next line is necessary for correctly redrawing |
3651 | mouse-face areas after scrolling and other operations. | |
3652 | However, it causes excessive flickering when mouse is moved | |
3653 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
3654 | line doesn't seem to hurt anything. -- cyd. |
3655 | But it is still needed for the header line. -- kfs. */ | |
3656 | || (current_row->mouse_face_p | |
3657 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
3658 | || current_row->x != desired_row->x) |
3659 | { | |
3660 | rif->cursor_to (vpos, 0, desired_row->y, desired_row->x); | |
177c0ea7 | 3661 | |
5f5c8ee5 GM |
3662 | if (desired_row->used[TEXT_AREA]) |
3663 | rif->write_glyphs (desired_row->glyphs[TEXT_AREA], | |
3664 | desired_row->used[TEXT_AREA]); | |
177c0ea7 | 3665 | |
5f5c8ee5 GM |
3666 | /* Clear to end of window. */ |
3667 | rif->clear_end_of_line (-1); | |
408f5064 | 3668 | changed_p = 1; |
60f2f3f1 GM |
3669 | |
3670 | /* This erases the cursor. We do this here because | |
3671 | notice_overwritten_cursor cannot easily check this, which | |
3672 | might indicate that the whole functionality of | |
3673 | notice_overwritten_cursor would better be implemented here. | |
3674 | On the other hand, we need notice_overwritten_cursor as long | |
3675 | as mouse highlighting is done asynchronously outside of | |
3676 | redisplay. */ | |
3677 | if (vpos == w->phys_cursor.vpos) | |
3678 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
3679 | } |
3680 | else | |
3681 | { | |
3682 | int stop, i, x; | |
3683 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
3684 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
59ea14cd | 3685 | bool overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 3686 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
59ea14cd | 3687 | bool abort_skipping = 0; |
5f5c8ee5 | 3688 | |
78897758 YM |
3689 | /* If the desired row extends its face to the text area end, and |
3690 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
3691 | make sure we write at least one glyph, so that the face |
3692 | extension actually takes place. */ | |
78897758 YM |
3693 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
3694 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
3695 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
3696 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 3697 | --desired_stop_pos; |
177c0ea7 | 3698 | |
5f5c8ee5 GM |
3699 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
3700 | i = 0; | |
3701 | x = desired_row->x; | |
8399f8a0 GM |
3702 | |
3703 | /* Loop over glyphs that current and desired row may have | |
3704 | in common. */ | |
5f5c8ee5 | 3705 | while (i < stop) |
352f1545 | 3706 | { |
59ea14cd | 3707 | bool can_skip_p = !abort_skipping; |
177c0ea7 | 3708 | |
5f5c8ee5 | 3709 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
3710 | don't have to be written. We can't skip if the last |
3711 | current glyph overlaps the glyph to its right. For | |
3712 | example, consider a current row of `if ' with the `f' in | |
3713 | Courier bold so that it overlaps the ` ' to its right. | |
3714 | If the desired row is ` ', we would skip over the space | |
3715 | after the `if' and there would remain a pixel from the | |
3716 | `f' on the screen. */ | |
3717 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 3718 | { |
e47306e6 GM |
3719 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
3720 | int left, right; | |
177c0ea7 | 3721 | |
d3d50620 | 3722 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
e47306e6 | 3723 | &left, &right); |
91d227d9 | 3724 | can_skip_p = (right == 0 && !abort_skipping); |
352f1545 | 3725 | } |
177c0ea7 | 3726 | |
6d950f4c | 3727 | if (can_skip_p) |
352f1545 | 3728 | { |
91d227d9 CY |
3729 | int start_hpos = i; |
3730 | ||
6d950f4c GM |
3731 | while (i < stop |
3732 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
3733 | { | |
3734 | x += desired_glyph->pixel_width; | |
3735 | ++desired_glyph, ++current_glyph, ++i; | |
3736 | } | |
3737 | ||
3738 | /* Consider the case that the current row contains "xxx | |
3739 | ppp ggg" in italic Courier font, and the desired row | |
3740 | is "xxx ggg". The character `p' has lbearing, `g' | |
3741 | has not. The loop above will stop in front of the | |
3742 | first `p' in the current row. If we would start | |
3743 | writing glyphs there, we wouldn't erase the lbearing | |
3744 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 3745 | taken care of by draw_glyphs. */ |
6d950f4c GM |
3746 | if (overlapping_glyphs_p |
3747 | && i > 0 | |
3748 | && i < current_row->used[TEXT_AREA] | |
3749 | && (current_row->used[TEXT_AREA] | |
3750 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 3751 | { |
6d950f4c | 3752 | int left, right; |
177c0ea7 | 3753 | |
3a45383a | 3754 | rif->get_glyph_overhangs (current_glyph, |
d3d50620 | 3755 | XFRAME (w->frame), |
6d950f4c GM |
3756 | &left, &right); |
3757 | while (left > 0 && i > 0) | |
3758 | { | |
3759 | --i, --desired_glyph, --current_glyph; | |
3760 | x -= desired_glyph->pixel_width; | |
3761 | left -= desired_glyph->pixel_width; | |
3762 | } | |
91d227d9 CY |
3763 | |
3764 | /* Abort the skipping algorithm if we end up before | |
3765 | our starting point, to avoid looping (bug#1070). | |
3766 | This can happen when the lbearing is larger than | |
3767 | the pixel width. */ | |
3768 | abort_skipping = (i < start_hpos); | |
5f5c8ee5 | 3769 | } |
352f1545 | 3770 | } |
177c0ea7 | 3771 | |
5f5c8ee5 GM |
3772 | /* Try to avoid writing the entire rest of the desired row |
3773 | by looking for a resync point. This mainly prevents | |
3774 | mode line flickering in the case the mode line is in | |
3775 | fixed-pitch font, which it usually will be. */ | |
3776 | if (i < desired_row->used[TEXT_AREA]) | |
3777 | { | |
3778 | int start_x = x, start_hpos = i; | |
3779 | struct glyph *start = desired_glyph; | |
3780 | int current_x = x; | |
59ea14cd | 3781 | bool skip_first_p = !can_skip_p; |
6d950f4c | 3782 | |
5f5c8ee5 GM |
3783 | /* Find the next glyph that's equal again. */ |
3784 | while (i < stop | |
6d950f4c GM |
3785 | && (skip_first_p |
3786 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
3787 | && x == current_x) |
3788 | { | |
3789 | x += desired_glyph->pixel_width; | |
3790 | current_x += current_glyph->pixel_width; | |
3791 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 3792 | skip_first_p = 0; |
5f5c8ee5 | 3793 | } |
23b0200c | 3794 | |
5f5c8ee5 GM |
3795 | if (i == start_hpos || x != current_x) |
3796 | { | |
3797 | i = start_hpos; | |
3798 | x = start_x; | |
3799 | desired_glyph = start; | |
3800 | break; | |
3801 | } | |
e47306e6 | 3802 | |
5f5c8ee5 GM |
3803 | rif->cursor_to (vpos, start_hpos, desired_row->y, start_x); |
3804 | rif->write_glyphs (start, i - start_hpos); | |
408f5064 | 3805 | changed_p = 1; |
5f5c8ee5 GM |
3806 | } |
3807 | } | |
177c0ea7 | 3808 | |
5f5c8ee5 GM |
3809 | /* Write the rest. */ |
3810 | if (i < desired_row->used[TEXT_AREA]) | |
3811 | { | |
3812 | rif->cursor_to (vpos, i, desired_row->y, x); | |
3813 | rif->write_glyphs (desired_glyph, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 3814 | changed_p = 1; |
5f5c8ee5 | 3815 | } |
177c0ea7 | 3816 | |
5f5c8ee5 GM |
3817 | /* Maybe clear to end of line. */ |
3818 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
3819 | { | |
3820 | /* If new row extends to the end of the text area, nothing | |
3821 | has to be cleared, if and only if we did a write_glyphs | |
3822 | above. This is made sure by setting desired_stop_pos | |
3823 | appropriately above. */ | |
a54e2c05 | 3824 | eassert (i < desired_row->used[TEXT_AREA] |
78897758 YM |
3825 | || ((desired_row->used[TEXT_AREA] |
3826 | == current_row->used[TEXT_AREA]) | |
3827 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
3828 | } |
3829 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
3830 | { | |
3831 | /* If old row extends to the end of the text area, clear. */ | |
3832 | if (i >= desired_row->used[TEXT_AREA]) | |
3833 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3834 | desired_row->pixel_width); |
5f5c8ee5 | 3835 | rif->clear_end_of_line (-1); |
408f5064 | 3836 | changed_p = 1; |
5f5c8ee5 GM |
3837 | } |
3838 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 3839 | { |
5f5c8ee5 GM |
3840 | /* Otherwise clear to the end of the old row. Everything |
3841 | after that position should be clear already. */ | |
27786b2f | 3842 | int xlim; |
177c0ea7 | 3843 | |
5f5c8ee5 GM |
3844 | if (i >= desired_row->used[TEXT_AREA]) |
3845 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3846 | desired_row->pixel_width); |
5f5c8ee5 GM |
3847 | |
3848 | /* If cursor is displayed at the end of the line, make sure | |
3849 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
3850 | with which to erase the cursor (because this method | |
3851 | doesn't work with lbearing/rbearing), so we must do it | |
3852 | this way. */ | |
3853 | if (vpos == w->phys_cursor.vpos | |
f951a506 EZ |
3854 | && (desired_row->reversed_p |
3855 | ? (w->phys_cursor.hpos < 0) | |
3856 | : (w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]))) | |
5f5c8ee5 GM |
3857 | { |
3858 | w->phys_cursor_on_p = 0; | |
27786b2f | 3859 | xlim = -1; |
5f5c8ee5 GM |
3860 | } |
3861 | else | |
27786b2f PE |
3862 | xlim = current_row->pixel_width; |
3863 | rif->clear_end_of_line (xlim); | |
408f5064 | 3864 | changed_p = 1; |
2e8907d3 | 3865 | } |
23b0200c | 3866 | } |
408f5064 GM |
3867 | |
3868 | return changed_p; | |
23b0200c | 3869 | } |
4588ec20 | 3870 | |
5f5c8ee5 | 3871 | |
59ea14cd | 3872 | /* Update row VPOS in window W. Value is true if display has been changed. */ |
5f5c8ee5 | 3873 | |
59ea14cd PE |
3874 | static bool |
3875 | update_window_line (struct window *w, int vpos, bool *mouse_face_overwritten_p) | |
5f5c8ee5 GM |
3876 | { |
3877 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
3878 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3879 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
59ea14cd | 3880 | bool changed_p = 0; |
5f5c8ee5 | 3881 | |
5f5c8ee5 GM |
3882 | /* Set the row being updated. This is important to let xterm.c |
3883 | know what line height values are in effect. */ | |
3884 | updated_row = desired_row; | |
3885 | ||
177c0ea7 JB |
3886 | /* A row can be completely invisible in case a desired matrix was |
3887 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
3888 | the matrix. Make sure to make such rows current anyway, since |
3889 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
3890 | if (desired_row->mode_line_p |
3891 | || desired_row->visible_height > 0) | |
408f5064 | 3892 | { |
a54e2c05 | 3893 | eassert (desired_row->enabled_p); |
504805ac GM |
3894 | |
3895 | /* Update display of the left margin area, if there is one. */ | |
3896 | if (!desired_row->full_width_p | |
d3d50620 | 3897 | && !NILP (w->left_margin_cols)) |
504805ac GM |
3898 | { |
3899 | changed_p = 1; | |
3900 | update_marginal_area (w, LEFT_MARGIN_AREA, vpos); | |
e9957956 EZ |
3901 | /* Setting this flag will ensure the vertical border, if |
3902 | any, between this window and the one on its left will be | |
3903 | redrawn. This is necessary because updating the left | |
3904 | margin area can potentially draw over the border. */ | |
3905 | current_row->redraw_fringe_bitmaps_p = 1; | |
504805ac | 3906 | } |
177c0ea7 | 3907 | |
504805ac GM |
3908 | /* Update the display of the text area. */ |
3909 | if (update_text_area (w, vpos)) | |
3910 | { | |
3911 | changed_p = 1; | |
3912 | if (current_row->mouse_face_p) | |
3913 | *mouse_face_overwritten_p = 1; | |
3914 | } | |
177c0ea7 | 3915 | |
504805ac GM |
3916 | /* Update display of the right margin area, if there is one. */ |
3917 | if (!desired_row->full_width_p | |
d3d50620 | 3918 | && !NILP (w->right_margin_cols)) |
504805ac GM |
3919 | { |
3920 | changed_p = 1; | |
3921 | update_marginal_area (w, RIGHT_MARGIN_AREA, vpos); | |
3922 | } | |
177c0ea7 | 3923 | |
504805ac GM |
3924 | /* Draw truncation marks etc. */ |
3925 | if (!current_row->enabled_p | |
3926 | || desired_row->y != current_row->y | |
3927 | || desired_row->visible_height != current_row->visible_height | |
6b61353c | 3928 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 3929 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
6b61353c | 3930 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 3931 | || desired_row->mode_line_p != current_row->mode_line_p |
6b61353c | 3932 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
3933 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
3934 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
3935 | rif->after_update_window_line_hook (desired_row); | |
408f5064 | 3936 | } |
177c0ea7 | 3937 | |
5f5c8ee5 GM |
3938 | /* Update current_row from desired_row. */ |
3939 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
3940 | updated_row = NULL; | |
408f5064 | 3941 | return changed_p; |
5f5c8ee5 GM |
3942 | } |
3943 | ||
3944 | ||
3945 | /* Set the cursor after an update of window W. This function may only | |
3946 | be called from update_window. */ | |
3947 | ||
3948 | static void | |
971de7fb | 3949 | set_window_cursor_after_update (struct window *w) |
4588ec20 | 3950 | { |
d3d50620 | 3951 | struct frame *f = XFRAME (w->frame); |
fa971ac3 | 3952 | struct redisplay_interface *rif = FRAME_RIF (f); |
5f5c8ee5 GM |
3953 | int cx, cy, vpos, hpos; |
3954 | ||
3955 | /* Not intended for frame matrix updates. */ | |
a54e2c05 | 3956 | eassert (FRAME_WINDOW_P (f)); |
177c0ea7 | 3957 | |
b96fd3e8 GM |
3958 | if (cursor_in_echo_area |
3959 | && !NILP (echo_area_buffer[0]) | |
3960 | /* If we are showing a message instead of the mini-buffer, | |
3961 | show the cursor for the message instead. */ | |
3962 | && XWINDOW (minibuf_window) == w | |
3963 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
3964 | /* These cases apply only to the frame that contains |
3965 | the active mini-buffer window. */ | |
3966 | && FRAME_HAS_MINIBUF_P (f) | |
3967 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
3968 | { | |
3969 | cx = cy = vpos = hpos = 0; | |
3970 | ||
3971 | if (cursor_in_echo_area >= 0) | |
3972 | { | |
3973 | /* If the mini-buffer is several lines high, find the last | |
3974 | line that has any text on it. Note: either all lines | |
3975 | are enabled or none. Otherwise we wouldn't be able to | |
3976 | determine Y. */ | |
862b4790 GM |
3977 | struct glyph_row *row, *last_row; |
3978 | struct glyph *glyph; | |
3979 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 3980 | |
862b4790 | 3981 | last_row = NULL; |
6206f8ce GM |
3982 | row = w->current_matrix->rows; |
3983 | while (row->enabled_p | |
3984 | && (last_row == NULL | |
3985 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 3986 | { |
862b4790 GM |
3987 | if (row->used[TEXT_AREA] |
3988 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
3989 | last_row = row; | |
6206f8ce | 3990 | ++row; |
862b4790 | 3991 | } |
177c0ea7 | 3992 | |
5f5c8ee5 GM |
3993 | if (last_row) |
3994 | { | |
6206f8ce GM |
3995 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
3996 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 3997 | |
b96fd3e8 | 3998 | while (last > start && last->charpos < 0) |
862b4790 | 3999 | --last; |
177c0ea7 | 4000 | |
862b4790 GM |
4001 | for (glyph = start; glyph < last; ++glyph) |
4002 | { | |
4003 | cx += glyph->pixel_width; | |
4004 | ++hpos; | |
4005 | } | |
4006 | ||
5f5c8ee5 | 4007 | cy = last_row->y; |
862b4790 | 4008 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
4009 | } |
4010 | } | |
4011 | } | |
4012 | else | |
4013 | { | |
4014 | cx = w->cursor.x; | |
4015 | cy = w->cursor.y; | |
4016 | hpos = w->cursor.hpos; | |
4017 | vpos = w->cursor.vpos; | |
4018 | } | |
4588ec20 | 4019 | |
2dd61a9b | 4020 | /* Window cursor can be out of sync for horizontally split windows. |
cccaebd2 | 4021 | Horizontal position is -1 when cursor is on the left fringe. */ |
2dd61a9b DA |
4022 | hpos = clip_to_bounds (-1, hpos, w->current_matrix->matrix_w - 1); |
4023 | vpos = clip_to_bounds (0, vpos, w->current_matrix->nrows - 1); | |
5f5c8ee5 | 4024 | rif->cursor_to (vpos, hpos, cy, cx); |
4588ec20 | 4025 | } |
4588ec20 | 4026 | |
5f5c8ee5 | 4027 | |
6df5d75f GM |
4028 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window |
4029 | tree rooted at W. */ | |
4030 | ||
4031 | void | |
59ea14cd | 4032 | set_window_update_flags (struct window *w, bool on_p) |
6df5d75f GM |
4033 | { |
4034 | while (w) | |
4035 | { | |
d3d50620 DA |
4036 | if (!NILP (w->hchild)) |
4037 | set_window_update_flags (XWINDOW (w->hchild), on_p); | |
4038 | else if (!NILP (w->vchild)) | |
4039 | set_window_update_flags (XWINDOW (w->vchild), on_p); | |
6df5d75f GM |
4040 | else |
4041 | w->must_be_updated_p = on_p; | |
4042 | ||
d3d50620 | 4043 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
6df5d75f | 4044 | } |
177c0ea7 | 4045 | } |
6df5d75f GM |
4046 | |
4047 | ||
4048 | \f | |
4049 | /*********************************************************************** | |
4050 | Window-Based Scrolling | |
4051 | ***********************************************************************/ | |
4052 | ||
4053 | /* Structure describing rows in scrolling_window. */ | |
4054 | ||
4055 | struct row_entry | |
4056 | { | |
4057 | /* Number of occurrences of this row in desired and current matrix. */ | |
4058 | int old_uses, new_uses; | |
177c0ea7 | 4059 | |
6df5d75f GM |
4060 | /* Vpos of row in new matrix. */ |
4061 | int new_line_number; | |
4062 | ||
4063 | /* Bucket index of this row_entry in the hash table row_table. */ | |
ca9ce8f2 | 4064 | ptrdiff_t bucket; |
177c0ea7 | 4065 | |
6df5d75f GM |
4066 | /* The row described by this entry. */ |
4067 | struct glyph_row *row; | |
177c0ea7 | 4068 | |
6df5d75f GM |
4069 | /* Hash collision chain. */ |
4070 | struct row_entry *next; | |
4071 | }; | |
4072 | ||
4073 | /* A pool to allocate row_entry structures from, and the size of the | |
4074 | pool. The pool is reallocated in scrolling_window when we find | |
4075 | that we need a larger one. */ | |
4076 | ||
4077 | static struct row_entry *row_entry_pool; | |
ca9ce8f2 | 4078 | static ptrdiff_t row_entry_pool_size; |
6df5d75f GM |
4079 | |
4080 | /* Index of next free entry in row_entry_pool. */ | |
4081 | ||
ca9ce8f2 | 4082 | static ptrdiff_t row_entry_idx; |
6df5d75f GM |
4083 | |
4084 | /* The hash table used during scrolling, and the table's size. This | |
4085 | table is used to quickly identify equal rows in the desired and | |
4086 | current matrix. */ | |
4087 | ||
4088 | static struct row_entry **row_table; | |
ca9ce8f2 | 4089 | static ptrdiff_t row_table_size; |
6df5d75f GM |
4090 | |
4091 | /* Vectors of pointers to row_entry structures belonging to the | |
4092 | current and desired matrix, and the size of the vectors. */ | |
4093 | ||
4094 | static struct row_entry **old_lines, **new_lines; | |
0065d054 | 4095 | static ptrdiff_t old_lines_size, new_lines_size; |
6df5d75f GM |
4096 | |
4097 | /* A pool to allocate run structures from, and its size. */ | |
4098 | ||
4099 | static struct run *run_pool; | |
0065d054 | 4100 | static ptrdiff_t runs_size; |
6df5d75f GM |
4101 | |
4102 | /* A vector of runs of lines found during scrolling. */ | |
4103 | ||
4104 | static struct run **runs; | |
4105 | ||
6b1f9ba4 | 4106 | /* Add glyph row ROW to the scrolling hash table. */ |
6df5d75f | 4107 | |
b0ab8123 | 4108 | static struct row_entry * |
6b1f9ba4 | 4109 | add_row_entry (struct glyph_row *row) |
6df5d75f GM |
4110 | { |
4111 | struct row_entry *entry; | |
ca9ce8f2 | 4112 | ptrdiff_t i = row->hash % row_table_size; |
177c0ea7 | 4113 | |
6df5d75f | 4114 | entry = row_table[i]; |
a54e2c05 | 4115 | eassert (entry || verify_row_hash (row)); |
6b1f9ba4 | 4116 | while (entry && !row_equal_p (entry->row, row, 1)) |
6df5d75f | 4117 | entry = entry->next; |
177c0ea7 | 4118 | |
6df5d75f GM |
4119 | if (entry == NULL) |
4120 | { | |
4121 | entry = row_entry_pool + row_entry_idx++; | |
4122 | entry->row = row; | |
4123 | entry->old_uses = entry->new_uses = 0; | |
4124 | entry->new_line_number = 0; | |
4125 | entry->bucket = i; | |
4126 | entry->next = row_table[i]; | |
4127 | row_table[i] = entry; | |
4128 | } | |
4129 | ||
4130 | return entry; | |
4131 | } | |
4132 | ||
4133 | ||
5f5c8ee5 | 4134 | /* Try to reuse part of the current display of W by scrolling lines. |
59ea14cd | 4135 | HEADER_LINE_P means W has a header line. |
5f5c8ee5 GM |
4136 | |
4137 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4138 | Technique for Isolating Differences Between Files." It should take | |
4139 | O(N) time. | |
4140 | ||
4141 | A short outline of the steps of the algorithm | |
4142 | ||
4143 | 1. Skip lines equal at the start and end of both matrices. | |
4144 | ||
4145 | 2. Enter rows in the current and desired matrix into a symbol | |
4146 | table, counting how often they appear in both matrices. | |
4147 | ||
4148 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4149 | i.e. we assume that such lines are likely to have been moved. | |
4150 | ||
4151 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4152 | forward and backward. | |
4153 | ||
4154 | Value is | |
4155 | ||
4156 | -1 if all rows were found to be equal. | |
4157 | 0 to indicate that we did not scroll the display, or | |
4158 | 1 if we did scroll. */ | |
4159 | ||
4160 | static int | |
59ea14cd | 4161 | scrolling_window (struct window *w, bool header_line_p) |
4588ec20 | 4162 | { |
5f5c8ee5 GM |
4163 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4164 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4165 | int yb = window_text_bottom_y (w); | |
ca9ce8f2 PE |
4166 | ptrdiff_t i; |
4167 | int j, first_old, first_new, last_old, last_new; | |
4168 | int nruns, run_idx; | |
0065d054 | 4169 | ptrdiff_t n; |
6df5d75f | 4170 | struct row_entry *entry; |
fa971ac3 | 4171 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4172 | |
4173 | /* Skip over rows equal at the start. */ | |
59ea14cd | 4174 | for (i = header_line_p; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4175 | { |
bfdcafe1 GM |
4176 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4177 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4178 | ||
4179 | if (c->enabled_p | |
4180 | && d->enabled_p | |
6b61353c | 4181 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4182 | && c->y == d->y |
4183 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4184 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
6b1f9ba4 | 4185 | && row_equal_p (c, d, 1)) |
bfdcafe1 GM |
4186 | { |
4187 | assign_row (c, d); | |
4188 | d->enabled_p = 0; | |
4189 | } | |
4190 | else | |
4191 | break; | |
5f5c8ee5 | 4192 | } |
4588ec20 | 4193 | |
5f5c8ee5 GM |
4194 | /* Give up if some rows in the desired matrix are not enabled. */ |
4195 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4196 | return -1; | |
177c0ea7 | 4197 | |
5f5c8ee5 GM |
4198 | first_old = first_new = i; |
4199 | ||
4d8ade89 YM |
4200 | /* Set last_new to the index + 1 of the row that reaches the |
4201 | bottom boundary in the desired matrix. Give up if we find a | |
4202 | disabled row before we reach the bottom boundary. */ | |
5f5c8ee5 | 4203 | i = first_new + 1; |
4d8ade89 YM |
4204 | while (i < desired_matrix->nrows - 1) |
4205 | { | |
4206 | int bottom; | |
5f5c8ee5 | 4207 | |
4d8ade89 YM |
4208 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) |
4209 | return 0; | |
4210 | bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)); | |
4211 | if (bottom <= yb) | |
4212 | ++i; | |
4213 | if (bottom >= yb) | |
4214 | break; | |
4215 | } | |
5f5c8ee5 GM |
4216 | |
4217 | last_new = i; | |
4218 | ||
4d8ade89 YM |
4219 | /* Set last_old to the index + 1 of the row that reaches the bottom |
4220 | boundary in the current matrix. We don't look at the enabled | |
4221 | flag here because we plan to reuse part of the display even if | |
4222 | other parts are disabled. */ | |
5f5c8ee5 | 4223 | i = first_old + 1; |
93962bfa GM |
4224 | while (i < current_matrix->nrows - 1) |
4225 | { | |
4226 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4227 | if (bottom <= yb) | |
4228 | ++i; | |
4229 | if (bottom >= yb) | |
4230 | break; | |
4231 | } | |
4232 | ||
5f5c8ee5 GM |
4233 | last_old = i; |
4234 | ||
4235 | /* Skip over rows equal at the bottom. */ | |
4236 | i = last_new; | |
4237 | j = last_old; | |
4238 | while (i - 1 > first_new | |
4239 | && j - 1 > first_old | |
1e5b2111 EZ |
4240 | && MATRIX_ROW (current_matrix, j - 1)->enabled_p |
4241 | && (MATRIX_ROW (current_matrix, j - 1)->y | |
4242 | == MATRIX_ROW (desired_matrix, i - 1)->y) | |
4243 | && !MATRIX_ROW (desired_matrix, i - 1)->redraw_fringe_bitmaps_p | |
6b1f9ba4 | 4244 | && row_equal_p (MATRIX_ROW (desired_matrix, i - 1), |
e4e0bee9 | 4245 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
4246 | --i, --j; |
4247 | last_new = i; | |
4248 | last_old = j; | |
4249 | ||
4250 | /* Nothing to do if all rows are equal. */ | |
4251 | if (last_new == first_new) | |
4252 | return 0; | |
4253 | ||
0065d054 | 4254 | /* Check for integer overflow in size calculation. |
ca9ce8f2 PE |
4255 | |
4256 | If next_almost_prime checks (N) for divisibility by 2..10, then | |
4257 | it can return at most N + 10, e.g., next_almost_prime (1) == 11. | |
4258 | So, set next_almost_prime_increment_max to 10. | |
4259 | ||
4260 | It's just a coincidence that next_almost_prime_increment_max == | |
4261 | NEXT_ALMOST_PRIME_LIMIT - 1. If NEXT_ALMOST_PRIME_LIMIT were | |
4262 | 13, then next_almost_prime_increment_max would be 14, e.g., | |
4263 | because next_almost_prime (113) would be 127. */ | |
4264 | { | |
4265 | verify (NEXT_ALMOST_PRIME_LIMIT == 11); | |
4266 | enum { next_almost_prime_increment_max = 10 }; | |
ca9ce8f2 | 4267 | ptrdiff_t row_table_max = |
0065d054 PE |
4268 | (min (PTRDIFF_MAX, SIZE_MAX) / (3 * sizeof *row_table) |
4269 | - next_almost_prime_increment_max); | |
4270 | ptrdiff_t current_nrows_max = row_table_max - desired_matrix->nrows; | |
4271 | if (current_nrows_max < current_matrix->nrows) | |
ca9ce8f2 PE |
4272 | memory_full (SIZE_MAX); |
4273 | } | |
4274 | ||
6df5d75f | 4275 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 4276 | |
6df5d75f | 4277 | if (current_matrix->nrows > old_lines_size) |
0065d054 PE |
4278 | old_lines = xpalloc (old_lines, &old_lines_size, |
4279 | current_matrix->nrows - old_lines_size, | |
4280 | INT_MAX, sizeof *old_lines); | |
177c0ea7 | 4281 | |
6df5d75f | 4282 | if (desired_matrix->nrows > new_lines_size) |
0065d054 PE |
4283 | new_lines = xpalloc (new_lines, &new_lines_size, |
4284 | desired_matrix->nrows - new_lines_size, | |
4285 | INT_MAX, sizeof *new_lines); | |
6df5d75f | 4286 | |
ca9ce8f2 PE |
4287 | n = desired_matrix->nrows; |
4288 | n += current_matrix->nrows; | |
0065d054 | 4289 | if (row_table_size < 3 * n) |
6df5d75f | 4290 | { |
ca9ce8f2 | 4291 | ptrdiff_t size = next_almost_prime (3 * n); |
0065d054 | 4292 | row_table = xnrealloc (row_table, size, sizeof *row_table); |
ca9ce8f2 | 4293 | row_table_size = size; |
0065d054 | 4294 | memset (row_table, 0, size * sizeof *row_table); |
6df5d75f GM |
4295 | } |
4296 | ||
4297 | if (n > row_entry_pool_size) | |
0065d054 PE |
4298 | row_entry_pool = xpalloc (row_entry_pool, &row_entry_pool_size, |
4299 | n - row_entry_pool_size, | |
4300 | -1, sizeof *row_entry_pool); | |
6df5d75f GM |
4301 | |
4302 | if (desired_matrix->nrows > runs_size) | |
4303 | { | |
0065d054 PE |
4304 | runs = xnrealloc (runs, desired_matrix->nrows, sizeof *runs); |
4305 | run_pool = xnrealloc (run_pool, desired_matrix->nrows, sizeof *run_pool); | |
ca9ce8f2 | 4306 | runs_size = desired_matrix->nrows; |
6df5d75f GM |
4307 | } |
4308 | ||
4309 | nruns = run_idx = 0; | |
4310 | row_entry_idx = 0; | |
4311 | ||
4312 | /* Add rows from the current and desired matrix to the hash table | |
4313 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 4314 | |
5f5c8ee5 GM |
4315 | for (i = first_old; i < last_old; ++i) |
4316 | { | |
4317 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
4318 | { | |
6b1f9ba4 | 4319 | entry = add_row_entry (MATRIX_ROW (current_matrix, i)); |
6df5d75f GM |
4320 | old_lines[i] = entry; |
4321 | ++entry->old_uses; | |
5f5c8ee5 GM |
4322 | } |
4323 | else | |
6df5d75f | 4324 | old_lines[i] = NULL; |
5f5c8ee5 GM |
4325 | } |
4326 | ||
5f5c8ee5 GM |
4327 | for (i = first_new; i < last_new; ++i) |
4328 | { | |
a54e2c05 | 4329 | eassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); |
6b1f9ba4 | 4330 | entry = add_row_entry (MATRIX_ROW (desired_matrix, i)); |
6df5d75f GM |
4331 | ++entry->new_uses; |
4332 | entry->new_line_number = i; | |
4333 | new_lines[i] = entry; | |
5f5c8ee5 | 4334 | } |
4588ec20 | 4335 | |
5f5c8ee5 GM |
4336 | /* Identify moves based on lines that are unique and equal |
4337 | in both matrices. */ | |
4338 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
4339 | if (old_lines[i] |
4340 | && old_lines[i]->old_uses == 1 | |
4341 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 | 4342 | { |
27786b2f | 4343 | int p, q; |
6df5d75f GM |
4344 | int new_line = old_lines[i]->new_line_number; |
4345 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
4346 | |
4347 | /* Record move. */ | |
4348 | run->current_vpos = i; | |
4349 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
4350 | run->desired_vpos = new_line; | |
4351 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
4352 | run->nrows = 1; | |
4353 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
4354 | ||
4355 | /* Extend backward. */ | |
27786b2f PE |
4356 | p = i - 1; |
4357 | q = new_line - 1; | |
4358 | while (p > first_old | |
4359 | && q > first_new | |
4360 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4361 | { |
27786b2f | 4362 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 JB |
4363 | --run->current_vpos; |
4364 | --run->desired_vpos; | |
5f5c8ee5 GM |
4365 | ++run->nrows; |
4366 | run->height += h; | |
4367 | run->desired_y -= h; | |
4368 | run->current_y -= h; | |
27786b2f | 4369 | --p, --q; |
5f5c8ee5 | 4370 | } |
4588ec20 | 4371 | |
5f5c8ee5 | 4372 | /* Extend forward. */ |
27786b2f PE |
4373 | p = i + 1; |
4374 | q = new_line + 1; | |
4375 | while (p < last_old | |
4376 | && q < last_new | |
4377 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4378 | { |
27786b2f | 4379 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 | 4380 | ++run->nrows; |
5f5c8ee5 | 4381 | run->height += h; |
27786b2f | 4382 | ++p, ++q; |
5f5c8ee5 | 4383 | } |
19dff8dc | 4384 | |
5f5c8ee5 GM |
4385 | /* Insert run into list of all runs. Order runs by copied |
4386 | pixel lines. Note that we record runs that don't have to | |
4387 | be copied because they are already in place. This is done | |
4388 | because we can avoid calling update_window_line in this | |
4389 | case. */ | |
27786b2f | 4390 | for (p = 0; p < nruns && runs[p]->height > run->height; ++p) |
5f5c8ee5 | 4391 | ; |
27786b2f PE |
4392 | for (q = nruns; q > p; --q) |
4393 | runs[q] = runs[q - 1]; | |
4394 | runs[p] = run; | |
5f5c8ee5 GM |
4395 | ++nruns; |
4396 | ||
4397 | i += run->nrows; | |
4398 | } | |
4399 | else | |
4400 | ++i; | |
4588ec20 | 4401 | |
5f5c8ee5 GM |
4402 | /* Do the moves. Do it in a way that we don't overwrite something |
4403 | we want to copy later on. This is not solvable in general | |
4404 | because there is only one display and we don't have a way to | |
4405 | exchange areas on this display. Example: | |
4588ec20 | 4406 | |
5f5c8ee5 GM |
4407 | +-----------+ +-----------+ |
4408 | | A | | B | | |
4409 | +-----------+ --> +-----------+ | |
4410 | | B | | A | | |
4411 | +-----------+ +-----------+ | |
4588ec20 | 4412 | |
5f5c8ee5 GM |
4413 | Instead, prefer bigger moves, and invalidate moves that would |
4414 | copy from where we copied to. */ | |
ea0d86af | 4415 | |
5f5c8ee5 GM |
4416 | for (i = 0; i < nruns; ++i) |
4417 | if (runs[i]->nrows > 0) | |
4418 | { | |
4419 | struct run *r = runs[i]; | |
24e86043 | 4420 | |
5f5c8ee5 GM |
4421 | /* Copy on the display. */ |
4422 | if (r->current_y != r->desired_y) | |
4423 | { | |
989b42d2 | 4424 | rif->clear_window_mouse_face (w); |
5f5c8ee5 | 4425 | rif->scroll_run_hook (w, r); |
1305621b | 4426 | } |
5f5c8ee5 | 4427 | |
1305621b YM |
4428 | /* Truncate runs that copy to where we copied to, and |
4429 | invalidate runs that copy from where we copied to. */ | |
4430 | for (j = nruns - 1; j > i; --j) | |
4431 | { | |
4432 | struct run *p = runs[j]; | |
59ea14cd | 4433 | bool truncated_p = 0; |
5f5c8ee5 | 4434 | |
1305621b YM |
4435 | if (p->nrows > 0 |
4436 | && p->desired_y < r->desired_y + r->height | |
4437 | && p->desired_y + p->height > r->desired_y) | |
5f5c8ee5 | 4438 | { |
1305621b YM |
4439 | if (p->desired_y < r->desired_y) |
4440 | { | |
4441 | p->nrows = r->desired_vpos - p->desired_vpos; | |
4442 | p->height = r->desired_y - p->desired_y; | |
4443 | truncated_p = 1; | |
4444 | } | |
4445 | else | |
4446 | { | |
4447 | int nrows_copied = (r->desired_vpos + r->nrows | |
4448 | - p->desired_vpos); | |
4449 | ||
4450 | if (p->nrows <= nrows_copied) | |
4451 | p->nrows = 0; | |
4452 | else | |
4453 | { | |
4454 | int height_copied = (r->desired_y + r->height | |
4455 | - p->desired_y); | |
4456 | ||
4457 | p->current_vpos += nrows_copied; | |
4458 | p->desired_vpos += nrows_copied; | |
4459 | p->nrows -= nrows_copied; | |
4460 | p->current_y += height_copied; | |
4461 | p->desired_y += height_copied; | |
4462 | p->height -= height_copied; | |
4463 | truncated_p = 1; | |
4464 | } | |
4465 | } | |
4466 | } | |
177c0ea7 | 4467 | |
1305621b YM |
4468 | if (r->current_y != r->desired_y |
4469 | /* The condition below is equivalent to | |
4470 | ((p->current_y >= r->desired_y | |
5f5c8ee5 | 4471 | && p->current_y < r->desired_y + r->height) |
1305621b | 4472 | || (p->current_y + p->height > r->desired_y |
5f5c8ee5 | 4473 | && (p->current_y + p->height |
1305621b YM |
4474 | <= r->desired_y + r->height))) |
4475 | because we have 0 < p->height <= r->height. */ | |
4476 | && p->current_y < r->desired_y + r->height | |
4477 | && p->current_y + p->height > r->desired_y) | |
4478 | p->nrows = 0; | |
4479 | ||
4480 | /* Reorder runs by copied pixel lines if truncated. */ | |
4481 | if (truncated_p && p->nrows > 0) | |
4482 | { | |
4483 | int k = nruns - 1; | |
4484 | ||
4485 | while (runs[k]->nrows == 0 || runs[k]->height < p->height) | |
4486 | k--; | |
4487 | memmove (runs + j, runs + j + 1, (k - j) * sizeof (*runs)); | |
4488 | runs[k] = p; | |
5f5c8ee5 GM |
4489 | } |
4490 | } | |
ea0d86af | 4491 | |
5f5c8ee5 GM |
4492 | /* Assign matrix rows. */ |
4493 | for (j = 0; j < r->nrows; ++j) | |
4494 | { | |
4495 | struct glyph_row *from, *to; | |
59ea14cd | 4496 | bool to_overlapped_p; |
e876ff42 | 4497 | |
5f5c8ee5 GM |
4498 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
4499 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 4500 | to_overlapped_p = to->overlapped_p; |
e61124cd | 4501 | from->redraw_fringe_bitmaps_p = from->fringe_bitmap_periodic_p; |
5f5c8ee5 | 4502 | assign_row (to, from); |
1305621b YM |
4503 | /* The above `assign_row' actually does swap, so if we had |
4504 | an overlap in the copy destination of two runs, then | |
4505 | the second run would assign a previously disabled bogus | |
4506 | row. But thanks to the truncation code in the | |
4507 | preceding for-loop, we no longer have such an overlap, | |
4508 | and thus the assigned row should always be enabled. */ | |
a54e2c05 | 4509 | eassert (to->enabled_p); |
1305621b | 4510 | from->enabled_p = 0; |
408f5064 | 4511 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
4512 | } |
4513 | } | |
15874c59 | 4514 | |
6df5d75f GM |
4515 | /* Clear the hash table, for the next time. */ |
4516 | for (i = 0; i < row_entry_idx; ++i) | |
4517 | row_table[row_entry_pool[i].bucket] = NULL; | |
4518 | ||
aec1708a PE |
4519 | /* Value is 1 to indicate that we scrolled the display. */ |
4520 | return 0 < nruns; | |
5f5c8ee5 | 4521 | } |
de83c314 | 4522 | |
15874c59 | 4523 | |
4588ec20 | 4524 | \f |
5f5c8ee5 GM |
4525 | /************************************************************************ |
4526 | Frame-Based Updates | |
4527 | ************************************************************************/ | |
4588ec20 | 4528 | |
5f5c8ee5 | 4529 | /* Update the desired frame matrix of frame F. |
4588ec20 | 4530 | |
59ea14cd PE |
4531 | FORCE_P means that the update should not be stopped by pending input. |
4532 | INHIBIT_HAIRY_ID_P means that scrolling should not be tried. | |
5f5c8ee5 | 4533 | |
59ea14cd | 4534 | Value is true if update was stopped due to pending input. */ |
5f5c8ee5 | 4535 | |
59ea14cd PE |
4536 | static bool |
4537 | update_frame_1 (struct frame *f, bool force_p, bool inhibit_id_p) | |
4588ec20 | 4538 | { |
5f5c8ee5 GM |
4539 | /* Frame matrices to work on. */ |
4540 | struct glyph_matrix *current_matrix = f->current_matrix; | |
4541 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
4542 | int i; | |
59ea14cd | 4543 | bool pause_p; |
4588ec20 | 4544 | int preempt_count = baud_rate / 2400 + 1; |
5f5c8ee5 | 4545 | |
a54e2c05 | 4546 | eassert (current_matrix && desired_matrix); |
4588ec20 | 4547 | |
c37e4889 RS |
4548 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
4549 | calculate_costs (f); | |
4550 | ||
d88c2b9e RS |
4551 | if (preempt_count <= 0) |
4552 | preempt_count = 1; | |
4553 | ||
a2130dbb KS |
4554 | #if !PERIODIC_PREEMPTION_CHECKING |
4555 | if (!force_p && detect_input_pending_ignore_squeezables ()) | |
4588ec20 | 4556 | { |
27786b2f | 4557 | pause_p = 1; |
4588ec20 JB |
4558 | goto do_pause; |
4559 | } | |
d012c62b | 4560 | #endif |
4588ec20 | 4561 | |
5f5c8ee5 | 4562 | /* If we cannot insert/delete lines, it's no use trying it. */ |
daf01701 | 4563 | if (!FRAME_LINE_INS_DEL_OK (f)) |
5f5c8ee5 | 4564 | inhibit_id_p = 1; |
7098a0fa | 4565 | |
efb859b4 | 4566 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
4567 | i/d line if just want cursor motion. */ |
4568 | for (i = 0; i < desired_matrix->nrows; i++) | |
4569 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
4570 | break; |
4571 | ||
4572 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
4573 | if (!inhibit_id_p && i < desired_matrix->nrows) |
4574 | force_p |= scrolling (f); | |
4588ec20 JB |
4575 | |
4576 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
4577 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
4578 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 4579 | |
5f5c8ee5 GM |
4580 | /* Now update the rest of the lines. */ |
4581 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 4582 | { |
5f5c8ee5 | 4583 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 4584 | { |
b6a65ac2 | 4585 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
4586 | { |
4587 | /* Flush out every so many lines. | |
4588 | Also flush out if likely to have more than 1k buffered | |
4589 | otherwise. I'm told that some telnet connections get | |
4590 | really screwed by more than 1k output at once. */ | |
fced92f1 CY |
4591 | FILE *display_output = FRAME_TTY (f)->output; |
4592 | if (display_output) | |
4588ec20 | 4593 | { |
8148369c | 4594 | ptrdiff_t outq = __fpending (display_output); |
fced92f1 CY |
4595 | if (outq > 900 |
4596 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
06b63c9b | 4597 | fflush (display_output); |
4588ec20 | 4598 | } |
4588ec20 JB |
4599 | } |
4600 | ||
d012c62b KS |
4601 | #if PERIODIC_PREEMPTION_CHECKING |
4602 | if (!force_p) | |
4603 | { | |
e9a9ae03 | 4604 | EMACS_TIME tm = current_emacs_time (); |
d35af63c | 4605 | if (EMACS_TIME_LT (preemption_next_check, tm)) |
d012c62b | 4606 | { |
e9a9ae03 | 4607 | preemption_next_check = add_emacs_time (tm, preemption_period); |
993d4ab6 KS |
4608 | if (detect_input_pending_ignore_squeezables ()) |
4609 | break; | |
d012c62b KS |
4610 | } |
4611 | } | |
4612 | #else | |
4613 | if (!force_p && (i - 1) % preempt_count == 0) | |
a2d5fca0 | 4614 | detect_input_pending_ignore_squeezables (); |
d012c62b | 4615 | #endif |
a2960116 | 4616 | |
5f5c8ee5 | 4617 | update_frame_line (f, i); |
4588ec20 | 4618 | } |
4588ec20 | 4619 | } |
177c0ea7 | 4620 | |
b98521db | 4621 | lint_assume (0 <= FRAME_LINES (f)); |
59ea14cd | 4622 | pause_p = 0 < i && i < FRAME_LINES (f) - 1; |
4588ec20 JB |
4623 | |
4624 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
27786b2f | 4625 | if (!pause_p) |
4588ec20 | 4626 | { |
48cf7030 | 4627 | if ((cursor_in_echo_area |
5f5c8ee5 | 4628 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 4629 | show the cursor for the message instead of for the |
5f5c8ee5 | 4630 | (now hidden) mini-buffer contents. */ |
2577053b RS |
4631 | || (EQ (minibuf_window, selected_window) |
4632 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 4633 | && !NILP (echo_area_buffer[0]))) |
2577053b | 4634 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 4635 | the active mini-buffer window. */ |
2577053b | 4636 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 4637 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 4638 | { |
7df02016 | 4639 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
4640 | int row, col; |
4641 | ||
4642 | if (cursor_in_echo_area < 0) | |
4643 | { | |
5f5c8ee5 GM |
4644 | /* Negative value of cursor_in_echo_area means put |
4645 | cursor at beginning of line. */ | |
648fa17d JB |
4646 | row = top; |
4647 | col = 0; | |
4648 | } | |
1113d9db | 4649 | else |
648fa17d | 4650 | { |
5f5c8ee5 GM |
4651 | /* Positive value of cursor_in_echo_area means put |
4652 | cursor at the end of the prompt. If the mini-buffer | |
4653 | is several lines high, find the last line that has | |
4654 | any text on it. */ | |
7df02016 | 4655 | row = FRAME_LINES (f); |
177c0ea7 | 4656 | do |
648fa17d | 4657 | { |
5f5c8ee5 GM |
4658 | --row; |
4659 | col = 0; | |
177c0ea7 | 4660 | |
5f5c8ee5 GM |
4661 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
4662 | { | |
4663 | /* Frame rows are filled up with spaces that | |
4664 | must be ignored here. */ | |
5f5c8ee5 GM |
4665 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
4666 | row); | |
4667 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
4668 | struct glyph *last = start + r->used[TEXT_AREA]; | |
4669 | ||
4670 | while (last > start | |
4671 | && (last - 1)->charpos < 0) | |
4672 | --last; | |
177c0ea7 | 4673 | |
5f5c8ee5 GM |
4674 | col = last - start; |
4675 | } | |
648fa17d JB |
4676 | } |
4677 | while (row > top && col == 0); | |
4678 | ||
6395da5c | 4679 | /* Make sure COL is not out of range. */ |
868e640e | 4680 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 4681 | { |
6395da5c | 4682 | /* If we have another row, advance cursor into it. */ |
7df02016 | 4683 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 4684 | { |
7df02016 | 4685 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
4686 | row++; |
4687 | } | |
4688 | /* Otherwise move it back in range. */ | |
4689 | else | |
868e640e | 4690 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
4691 | } |
4692 | } | |
4693 | ||
385ed61f | 4694 | cursor_to (f, row, col); |
1113d9db | 4695 | } |
4588ec20 | 4696 | else |
5f5c8ee5 GM |
4697 | { |
4698 | /* We have only one cursor on terminal frames. Use it to | |
4699 | display the cursor of the selected window. */ | |
4700 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
4701 | if (w->cursor.vpos >= 0 |
4702 | /* The cursor vpos may be temporarily out of bounds | |
4703 | in the following situation: There is one window, | |
4704 | with the cursor in the lower half of it. The window | |
4705 | is split, and a message causes a redisplay before | |
4706 | a new cursor position has been computed. */ | |
7df02016 | 4707 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
4708 | { |
4709 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
4710 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
4711 | ||
d3d50620 DA |
4712 | if (INTEGERP (w->left_margin_cols)) |
4713 | x += XFASTINT (w->left_margin_cols); | |
177c0ea7 | 4714 | |
7df02016 | 4715 | /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */ |
385ed61f | 4716 | cursor_to (f, y, x); |
5f5c8ee5 GM |
4717 | } |
4718 | } | |
4588ec20 JB |
4719 | } |
4720 | ||
ef1b0ba7 | 4721 | #if !PERIODIC_PREEMPTION_CHECKING |
4588ec20 | 4722 | do_pause: |
ef1b0ba7 | 4723 | #endif |
4588ec20 | 4724 | |
5f5c8ee5 | 4725 | clear_desired_matrices (f); |
27786b2f | 4726 | return pause_p; |
4588ec20 JB |
4727 | } |
4728 | ||
4588ec20 | 4729 | |
5f5c8ee5 | 4730 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 4731 | |
59ea14cd | 4732 | static bool |
971de7fb | 4733 | scrolling (struct frame *frame) |
4588ec20 JB |
4734 | { |
4735 | int unchanged_at_top, unchanged_at_bottom; | |
4736 | int window_size; | |
4737 | int changed_lines; | |
38182d90 PE |
4738 | int *old_hash = alloca (FRAME_LINES (frame) * sizeof (int)); |
4739 | int *new_hash = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4740 | int *draw_cost = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4741 | int *old_draw_cost = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 4742 | register int i; |
7df02016 | 4743 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
4744 | struct glyph_matrix *current_matrix = frame->current_matrix; |
4745 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 4746 | |
5f5c8ee5 | 4747 | if (!current_matrix) |
1088b922 | 4748 | emacs_abort (); |
4588ec20 | 4749 | |
5f5c8ee5 GM |
4750 | /* Compute hash codes of all the lines. Also calculate number of |
4751 | changed lines, number of unchanged lines at the beginning, and | |
4752 | number of unchanged lines at the end. */ | |
4588ec20 JB |
4753 | changed_lines = 0; |
4754 | unchanged_at_top = 0; | |
7df02016 KS |
4755 | unchanged_at_bottom = FRAME_LINES (frame); |
4756 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
4757 | { |
4758 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 4759 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 4760 | return 0; |
5f5c8ee5 GM |
4761 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
4762 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
4763 | { |
4764 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
4765 | new_hash[i] = old_hash[i]; | |
4766 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
4767 | draw_cost[i] = INFINITY; | |
4768 | } | |
4588ec20 | 4769 | else |
f188b3c4 | 4770 | { |
5f5c8ee5 GM |
4771 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
4772 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 4773 | } |
4588ec20 JB |
4774 | |
4775 | if (old_hash[i] != new_hash[i]) | |
4776 | { | |
4777 | changed_lines++; | |
7df02016 | 4778 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
4779 | } |
4780 | else if (i == unchanged_at_top) | |
4781 | unchanged_at_top++; | |
5f5c8ee5 | 4782 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
4783 | } |
4784 | ||
4785 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
daf01701 | 4786 | if ((!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4787 | && changed_lines < baud_rate / 2400) |
7df02016 | 4788 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
4789 | return 1; |
4790 | ||
7df02016 | 4791 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
4792 | - unchanged_at_bottom); |
4793 | ||
daf01701 | 4794 | if (FRAME_SCROLL_REGION_OK (frame)) |
4588ec20 | 4795 | free_at_end_vpos -= unchanged_at_bottom; |
daf01701 | 4796 | else if (FRAME_MEMORY_BELOW_FRAME (frame)) |
4588ec20 JB |
4797 | free_at_end_vpos = -1; |
4798 | ||
4799 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 4800 | current frame and desired frame, don't bother with i/d calc. */ |
daf01701 | 4801 | if (!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4802 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
4803 | && (window_size >= |
4804 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 4805 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
4806 | old_hash, new_hash, draw_cost))) |
4807 | return 0; | |
4808 | ||
5f5c8ee5 GM |
4809 | if (window_size < 2) |
4810 | return 0; | |
4811 | ||
502b9b64 | 4812 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 4813 | draw_cost + unchanged_at_top - 1, |
190bb91a | 4814 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
4815 | old_hash + unchanged_at_top - 1, |
4816 | new_hash + unchanged_at_top - 1, | |
4817 | free_at_end_vpos - unchanged_at_top); | |
4818 | ||
4819 | return 0; | |
4820 | } | |
4588ec20 | 4821 | |
4588ec20 | 4822 | |
5f5c8ee5 GM |
4823 | /* Count the number of blanks at the start of the vector of glyphs R |
4824 | which is LEN glyphs long. */ | |
4588ec20 | 4825 | |
4588ec20 | 4826 | static int |
971de7fb | 4827 | count_blanks (struct glyph *r, int len) |
4588ec20 | 4828 | { |
5f5c8ee5 | 4829 | int i; |
177c0ea7 | 4830 | |
5f5c8ee5 GM |
4831 | for (i = 0; i < len; ++i) |
4832 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
4833 | break; | |
4834 | ||
4835 | return i; | |
4588ec20 JB |
4836 | } |
4837 | ||
5f5c8ee5 GM |
4838 | |
4839 | /* Count the number of glyphs in common at the start of the glyph | |
4840 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
4841 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
4842 | ||
4588ec20 | 4843 | static int |
971de7fb | 4844 | count_match (struct glyph *str1, struct glyph *end1, struct glyph *str2, struct glyph *end2) |
4588ec20 | 4845 | { |
5f5c8ee5 GM |
4846 | struct glyph *p1 = str1; |
4847 | struct glyph *p2 = str2; | |
177c0ea7 | 4848 | |
5f5c8ee5 GM |
4849 | while (p1 < end1 |
4850 | && p2 < end2 | |
42186983 | 4851 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 4852 | ++p1, ++p2; |
177c0ea7 | 4853 | |
5f5c8ee5 | 4854 | return p1 - str1; |
4588ec20 JB |
4855 | } |
4856 | ||
5f5c8ee5 | 4857 | |
4588ec20 | 4858 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 4859 | |
5e617bc2 | 4860 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS ((f))]) |
4588ec20 | 4861 | |
5f5c8ee5 GM |
4862 | |
4863 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
4864 | ||
4588ec20 | 4865 | static void |
971de7fb | 4866 | update_frame_line (struct frame *f, int vpos) |
4588ec20 | 4867 | { |
5f5c8ee5 | 4868 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
4869 | int tem; |
4870 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
4871 | struct glyph_matrix *current_matrix = f->current_matrix; |
4872 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
4873 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
4874 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
59ea14cd PE |
4875 | bool must_write_whole_line_p; |
4876 | bool write_spaces_p = FRAME_MUST_WRITE_SPACES (f); | |
4877 | bool colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background | |
4878 | != FACE_TTY_DEFAULT_BG_COLOR); | |
0a894bad GM |
4879 | |
4880 | if (colored_spaces_p) | |
4881 | write_spaces_p = 1; | |
5f5c8ee5 | 4882 | |
26c63686 GM |
4883 | /* Current row not enabled means it has unknown contents. We must |
4884 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
4885 | must_write_whole_line_p = !current_row->enabled_p; |
4886 | if (must_write_whole_line_p) | |
4588ec20 | 4887 | { |
5f5c8ee5 | 4888 | obody = 0; |
4588ec20 JB |
4889 | olen = 0; |
4890 | } | |
4891 | else | |
4892 | { | |
5f5c8ee5 GM |
4893 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
4894 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 4895 | |
4cecaab8 MB |
4896 | /* Ignore trailing spaces, if we can. */ |
4897 | if (!write_spaces_p) | |
4898 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
4899 | olen--; | |
4588ec20 JB |
4900 | } |
4901 | ||
5f5c8ee5 GM |
4902 | current_row->enabled_p = 1; |
4903 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 4904 | |
5f5c8ee5 GM |
4905 | /* If desired line is empty, just clear the line. */ |
4906 | if (!desired_row->enabled_p) | |
4588ec20 JB |
4907 | { |
4908 | nlen = 0; | |
4909 | goto just_erase; | |
4910 | } | |
4911 | ||
5f5c8ee5 GM |
4912 | nbody = desired_row->glyphs[TEXT_AREA]; |
4913 | nlen = desired_row->used[TEXT_AREA]; | |
4914 | nend = nbody + nlen; | |
4915 | ||
4916 | /* If display line has unknown contents, write the whole line. */ | |
4917 | if (must_write_whole_line_p) | |
4918 | { | |
26c63686 | 4919 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 4920 | if (!write_spaces_p) |
74ca462f GM |
4921 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
4922 | --nlen; | |
4923 | ||
26c63686 | 4924 | /* Write the contents of the desired line. */ |
74ca462f | 4925 | if (nlen) |
26c63686 | 4926 | { |
385ed61f KL |
4927 | cursor_to (f, vpos, 0); |
4928 | write_glyphs (f, nbody, nlen); | |
26c63686 | 4929 | } |
177c0ea7 | 4930 | |
26c63686 GM |
4931 | /* Don't call clear_end_of_line if we already wrote the whole |
4932 | line. The cursor will not be at the right margin in that | |
4933 | case but in the line below. */ | |
7df02016 | 4934 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 | 4935 | { |
385ed61f KL |
4936 | cursor_to (f, vpos, nlen); |
4937 | clear_end_of_line (f, FRAME_TOTAL_COLS (f)); | |
26c63686 | 4938 | } |
58827478 GM |
4939 | else |
4940 | /* Make sure we are in the right row, otherwise cursor movement | |
4941 | with cmgoto might use `ch' in the wrong row. */ | |
385ed61f | 4942 | cursor_to (f, vpos, 0); |
177c0ea7 | 4943 | |
5f5c8ee5 GM |
4944 | make_current (desired_matrix, current_matrix, vpos); |
4945 | return; | |
4946 | } | |
4588ec20 JB |
4947 | |
4948 | /* Pretend trailing spaces are not there at all, | |
4949 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
4950 | if (!write_spaces_p) |
4951 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
4952 | nlen--; | |
4588ec20 JB |
4953 | |
4954 | /* If there's no i/d char, quickly do the best we can without it. */ | |
daf01701 | 4955 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
4588ec20 | 4956 | { |
5f5c8ee5 | 4957 | int i, j; |
4588ec20 | 4958 | |
5f5c8ee5 GM |
4959 | /* Find the first glyph in desired row that doesn't agree with |
4960 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
4961 | for (i = 0; i < nlen; i++) |
4962 | { | |
5f5c8ee5 | 4963 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 4964 | { |
5f5c8ee5 GM |
4965 | /* Find the end of the run of different glyphs. */ |
4966 | j = i + 1; | |
4967 | while (j < nlen | |
4968 | && (j >= olen | |
4969 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
4970 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
4971 | ++j; | |
177c0ea7 JB |
4972 | |
4973 | /* Output this run of non-matching chars. */ | |
385ed61f KL |
4974 | cursor_to (f, vpos, i); |
4975 | write_glyphs (f, nbody + i, j - i); | |
5f5c8ee5 | 4976 | i = j - 1; |
4588ec20 JB |
4977 | |
4978 | /* Now find the next non-match. */ | |
4979 | } | |
4980 | } | |
4981 | ||
4982 | /* Clear the rest of the line, or the non-clear part of it. */ | |
4983 | if (olen > nlen) | |
4984 | { | |
385ed61f KL |
4985 | cursor_to (f, vpos, nlen); |
4986 | clear_end_of_line (f, olen); | |
4588ec20 JB |
4987 | } |
4988 | ||
5f5c8ee5 GM |
4989 | /* Make current row = desired row. */ |
4990 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
4991 | return; |
4992 | } | |
4993 | ||
5f5c8ee5 GM |
4994 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
4995 | characters in a row. */ | |
4996 | ||
4588ec20 JB |
4997 | if (!olen) |
4998 | { | |
5f5c8ee5 GM |
4999 | /* If current line is blank, skip over initial spaces, if |
5000 | possible, and write the rest. */ | |
4cecaab8 | 5001 | if (write_spaces_p) |
5f5c8ee5 GM |
5002 | nsp = 0; |
5003 | else | |
5004 | nsp = count_blanks (nbody, nlen); | |
5005 | ||
4588ec20 JB |
5006 | if (nlen > nsp) |
5007 | { | |
385ed61f KL |
5008 | cursor_to (f, vpos, nsp); |
5009 | write_glyphs (f, nbody + nsp, nlen - nsp); | |
4588ec20 JB |
5010 | } |
5011 | ||
502b9b64 | 5012 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 5013 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
5014 | return; |
5015 | } | |
5016 | ||
4588ec20 | 5017 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 5018 | osp = count_blanks (obody, olen); |
4cecaab8 | 5019 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 5020 | |
5f5c8ee5 GM |
5021 | /* Compute number of matching chars starting with first non-blank. */ |
5022 | begmatch = count_match (obody + osp, obody + olen, | |
5023 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
5024 | |
5025 | /* Spaces in new match implicit space past the end of old. */ | |
5026 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 5027 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
5028 | { |
5029 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
5030 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
5031 | ++begmatch; | |
4588ec20 JB |
5032 | } |
5033 | ||
5034 | /* Avoid doing insert/delete char | |
5035 | just cause number of leading spaces differs | |
5f5c8ee5 | 5036 | when the following text does not match. */ |
4588ec20 JB |
5037 | if (begmatch == 0 && osp != nsp) |
5038 | osp = nsp = min (osp, nsp); | |
5039 | ||
5040 | /* Find matching characters at end of line */ | |
5041 | op1 = obody + olen; | |
5042 | np1 = nbody + nlen; | |
5043 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
5044 | while (op1 > op2 |
5045 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
5046 | { |
5047 | op1--; | |
5048 | np1--; | |
5049 | } | |
5050 | endmatch = obody + olen - op1; | |
5051 | ||
4588ec20 JB |
5052 | /* tem gets the distance to insert or delete. |
5053 | endmatch is how many characters we save by doing so. | |
5054 | Is it worth it? */ | |
5055 | ||
5056 | tem = (nlen - nsp) - (olen - osp); | |
5057 | if (endmatch && tem | |
daf01701 | 5058 | && (!FRAME_CHAR_INS_DEL_OK (f) |
8a56675d | 5059 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
5060 | endmatch = 0; |
5061 | ||
5062 | /* nsp - osp is the distance to insert or delete. | |
5063 | If that is nonzero, begmatch is known to be nonzero also. | |
5064 | begmatch + endmatch is how much we save by doing the ins/del. | |
5065 | Is it worth it? */ | |
5066 | ||
5067 | if (nsp != osp | |
daf01701 | 5068 | && (!FRAME_CHAR_INS_DEL_OK (f) |
c363a1d6 | 5069 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
5070 | { |
5071 | begmatch = 0; | |
5072 | endmatch = 0; | |
5073 | osp = nsp = min (osp, nsp); | |
5074 | } | |
5075 | ||
5076 | /* Now go through the line, inserting, writing and | |
5077 | deleting as appropriate. */ | |
5078 | ||
5079 | if (osp > nsp) | |
5080 | { | |
385ed61f KL |
5081 | cursor_to (f, vpos, nsp); |
5082 | delete_glyphs (f, osp - nsp); | |
4588ec20 JB |
5083 | } |
5084 | else if (nsp > osp) | |
5085 | { | |
5086 | /* If going to delete chars later in line | |
5087 | and insert earlier in the line, | |
5088 | must delete first to avoid losing data in the insert */ | |
5089 | if (endmatch && nlen < olen + nsp - osp) | |
5090 | { | |
385ed61f KL |
5091 | cursor_to (f, vpos, nlen - endmatch + osp - nsp); |
5092 | delete_glyphs (f, olen + nsp - osp - nlen); | |
4588ec20 JB |
5093 | olen = nlen - (nsp - osp); |
5094 | } | |
385ed61f KL |
5095 | cursor_to (f, vpos, osp); |
5096 | insert_glyphs (f, 0, nsp - osp); | |
4588ec20 JB |
5097 | } |
5098 | olen += nsp - osp; | |
5099 | ||
5100 | tem = nsp + begmatch + endmatch; | |
5101 | if (nlen != tem || olen != tem) | |
5102 | { | |
4588ec20 JB |
5103 | if (!endmatch || nlen == olen) |
5104 | { | |
c363a1d6 GM |
5105 | /* If new text being written reaches right margin, there is |
5106 | no need to do clear-to-eol at the end of this function | |
5107 | (and it would not be safe, since cursor is not going to | |
5108 | be "at the margin" after the text is done). */ | |
7df02016 | 5109 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 5110 | olen = 0; |
c363a1d6 GM |
5111 | |
5112 | /* Function write_glyphs is prepared to do nothing | |
5113 | if passed a length <= 0. Check it here to avoid | |
5114 | unnecessary cursor movement. */ | |
5115 | if (nlen - tem > 0) | |
5116 | { | |
385ed61f KL |
5117 | cursor_to (f, vpos, nsp + begmatch); |
5118 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
c363a1d6 | 5119 | } |
4588ec20 JB |
5120 | } |
5121 | else if (nlen > olen) | |
5122 | { | |
24e86043 KH |
5123 | /* Here, we used to have the following simple code: |
5124 | ---------------------------------------- | |
5125 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
5126 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
5127 | ---------------------------------------- | |
5128 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
5129 | is a padding glyph. */ | |
5130 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
5131 | int del; | |
5f5c8ee5 | 5132 | |
385ed61f | 5133 | cursor_to (f, vpos, nsp + begmatch); |
177c0ea7 | 5134 | |
5f5c8ee5 | 5135 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
5136 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
5137 | out--; | |
385ed61f | 5138 | write_glyphs (f, nbody + nsp + begmatch, out); |
177c0ea7 | 5139 | |
5f5c8ee5 GM |
5140 | /* If we left columns to be overwritten, we must delete them. */ |
5141 | del = olen - tem - out; | |
c363a1d6 | 5142 | if (del > 0) |
385ed61f | 5143 | delete_glyphs (f, del); |
177c0ea7 | 5144 | |
5f5c8ee5 | 5145 | /* At last, we insert columns not yet written out. */ |
385ed61f | 5146 | insert_glyphs (f, nbody + nsp + begmatch + out, nlen - olen + del); |
5f5c8ee5 GM |
5147 | olen = nlen; |
5148 | } | |
5149 | else if (olen > nlen) | |
5150 | { | |
385ed61f KL |
5151 | cursor_to (f, vpos, nsp + begmatch); |
5152 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
5153 | delete_glyphs (f, olen - nlen); | |
5f5c8ee5 GM |
5154 | olen = nlen; |
5155 | } | |
bd9e3e75 | 5156 | } |
5f5c8ee5 GM |
5157 | |
5158 | just_erase: | |
5159 | /* If any unerased characters remain after the new line, erase them. */ | |
5160 | if (olen > nlen) | |
078b3696 | 5161 | { |
385ed61f KL |
5162 | cursor_to (f, vpos, nlen); |
5163 | clear_end_of_line (f, olen); | |
078b3696 | 5164 | } |
5f5c8ee5 GM |
5165 | |
5166 | /* Exchange contents between current_frame and new_frame. */ | |
5167 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5168 | } |
5f5c8ee5 GM |
5169 | |
5170 | ||
078b3696 | 5171 | \f |
5f5c8ee5 GM |
5172 | /*********************************************************************** |
5173 | X/Y Position -> Buffer Position | |
5174 | ***********************************************************************/ | |
5175 | ||
a1b0a6db | 5176 | /* Determine what's under window-relative pixel position (*X, *Y). |
2396cbba | 5177 | Return the OBJECT (string or buffer) that's there. |
6b61353c | 5178 | Return in *POS the position in that object. |
2396cbba EZ |
5179 | Adjust *X and *Y to character positions. |
5180 | Return in *DX and *DY the pixel coordinates of the click, | |
5181 | relative to the top left corner of OBJECT, or relative to | |
5182 | the top left corner of the character glyph at (*X, *Y) | |
5183 | if OBJECT is nil. | |
5184 | Return WIDTH and HEIGHT of the object at (*X, *Y), or zero | |
5185 | if the coordinates point to an empty area of the display. */ | |
5f5c8ee5 | 5186 | |
6b61353c | 5187 | Lisp_Object |
971de7fb | 5188 | 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 | 5189 | { |
5f5c8ee5 | 5190 | struct it it; |
707ea971 | 5191 | Lisp_Object old_current_buffer = Fcurrent_buffer (); |
5f5c8ee5 | 5192 | struct text_pos startp; |
6b61353c KH |
5193 | Lisp_Object string; |
5194 | struct glyph_row *row; | |
cedd7cd9 KS |
5195 | #ifdef HAVE_WINDOW_SYSTEM |
5196 | struct image *img = 0; | |
5197 | #endif | |
2396cbba | 5198 | int x0, x1, to_x; |
57b3e30b | 5199 | void *itdata = NULL; |
5f5c8ee5 | 5200 | |
707ea971 CY |
5201 | /* We used to set current_buffer directly here, but that does the |
5202 | wrong thing with `face-remapping-alist' (bug#2044). */ | |
d3d50620 | 5203 | Fset_buffer (w->buffer); |
57b3e30b | 5204 | itdata = bidi_shelve_cache (); |
d3d50620 | 5205 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
5f5c8ee5 GM |
5206 | CHARPOS (startp) = min (ZV, max (BEGV, CHARPOS (startp))); |
5207 | BYTEPOS (startp) = min (ZV_BYTE, max (BEGV_BYTE, BYTEPOS (startp))); | |
5208 | start_display (&it, w, startp); | |
352ec8ff EZ |
5209 | /* start_display takes into account the header-line row, but IT's |
5210 | vpos still counts from the glyph row that includes the window's | |
5211 | start position. Adjust for a possible header-line row. */ | |
59ea14cd | 5212 | it.vpos += WINDOW_WANTS_HEADER_LINE_P (w); |
177c0ea7 | 5213 | |
9173a8fb | 5214 | x0 = *x; |
2396cbba EZ |
5215 | |
5216 | /* First, move to the beginning of the row corresponding to *Y. We | |
5217 | need to be in that row to get the correct value of base paragraph | |
40629f17 | 5218 | direction for the text at (*X, *Y). */ |
2396cbba EZ |
5219 | move_it_to (&it, -1, 0, *y, -1, MOVE_TO_X | MOVE_TO_Y); |
5220 | ||
5221 | /* TO_X is the pixel position that the iterator will compute for the | |
40629f17 EZ |
5222 | glyph at *X. We add it.first_visible_x because iterator |
5223 | positions include the hscroll. */ | |
2396cbba EZ |
5224 | to_x = x0 + it.first_visible_x; |
5225 | if (it.bidi_it.paragraph_dir == R2L) | |
5226 | /* For lines in an R2L paragraph, we need to mirror TO_X wrt the | |
5227 | text area. This is because the iterator, even in R2L | |
5228 | paragraphs, delivers glyphs as if they started at the left | |
5229 | margin of the window. (When we actually produce glyphs for | |
5230 | display, we reverse their order in PRODUCE_GLYPHS, but the | |
5231 | iterator doesn't know about that.) The following line adjusts | |
5232 | the pixel position to the iterator geometry, which is what | |
40629f17 EZ |
5233 | move_it_* routines use. (The -1 is because in a window whose |
5234 | text-area width is W, the rightmost pixel position is W-1, and | |
5235 | it should be mirrored into zero pixel position.) */ | |
5236 | to_x = window_box_width (w, TEXT_AREA) - to_x - 1; | |
5237 | ||
5238 | /* Now move horizontally in the row to the glyph under *X. Second | |
5239 | argument is ZV to prevent move_it_in_display_line from matching | |
5240 | based on buffer positions. */ | |
2396cbba | 5241 | move_it_in_display_line (&it, ZV, to_x, MOVE_TO_X); |
35928349 | 5242 | bidi_unshelve_cache (itdata, 0); |
177c0ea7 | 5243 | |
707ea971 | 5244 | Fset_buffer (old_current_buffer); |
a1b0a6db | 5245 | |
6b61353c KH |
5246 | *dx = x0 + it.first_visible_x - it.current_x; |
5247 | *dy = *y - it.current_y; | |
5248 | ||
d3d50620 | 5249 | string = w->buffer; |
6b61353c KH |
5250 | if (STRINGP (it.string)) |
5251 | string = it.string; | |
a1b0a6db | 5252 | *pos = it.current; |
86282aab KH |
5253 | if (it.what == IT_COMPOSITION |
5254 | && it.cmp_it.nchars > 1 | |
5255 | && it.cmp_it.reversed_p) | |
5256 | { | |
5257 | /* The current display element is a grapheme cluster in a | |
5258 | composition. In that case, we need the position of the first | |
5259 | character of the cluster. But, as it.cmp_it.reversed_p is 1, | |
5260 | it.current points to the last character of the cluster, thus | |
5261 | we must move back to the first character of the same | |
5262 | cluster. */ | |
5263 | CHARPOS (pos->pos) -= it.cmp_it.nchars - 1; | |
5264 | if (STRINGP (it.string)) | |
5265 | BYTEPOS (pos->pos) = string_char_to_byte (string, CHARPOS (pos->pos)); | |
5266 | else | |
d3d50620 | 5267 | BYTEPOS (pos->pos) = buf_charpos_to_bytepos (XBUFFER (w->buffer), |
425cc014 | 5268 | CHARPOS (pos->pos)); |
86282aab | 5269 | } |
6b61353c KH |
5270 | |
5271 | #ifdef HAVE_WINDOW_SYSTEM | |
5272 | if (it.what == IT_IMAGE) | |
5273 | { | |
6b61353c KH |
5274 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5275 | && !NILP (img->spec)) | |
5276 | *object = img->spec; | |
5277 | } | |
5278 | #endif | |
5279 | ||
b70d98e1 KS |
5280 | if (it.vpos < w->current_matrix->nrows |
5281 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5282 | row->enabled_p)) | |
6b61353c KH |
5283 | { |
5284 | if (it.hpos < row->used[TEXT_AREA]) | |
5285 | { | |
5286 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6b61353c | 5287 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5288 | if (img) |
5289 | { | |
5290 | *dy -= row->ascent - glyph->ascent; | |
4be9765d KH |
5291 | *dx += glyph->slice.img.x; |
5292 | *dy += glyph->slice.img.y; | |
cedd7cd9 KS |
5293 | /* Image slices positions are still relative to the entire image */ |
5294 | *width = img->width; | |
5295 | *height = img->height; | |
5296 | } | |
5297 | else | |
6b61353c | 5298 | #endif |
cedd7cd9 KS |
5299 | { |
5300 | *width = glyph->pixel_width; | |
5301 | *height = glyph->ascent + glyph->descent; | |
5302 | } | |
6b61353c KH |
5303 | } |
5304 | else | |
5305 | { | |
5306 | *width = 0; | |
5307 | *height = row->height; | |
5308 | } | |
5309 | } | |
5310 | else | |
5311 | { | |
5312 | *width = *height = 0; | |
5313 | } | |
5314 | ||
5315 | /* Add extra (default width) columns if clicked after EOL. */ | |
5e617bc2 | 5316 | x1 = max (0, it.current_x + it.pixel_width - it.first_visible_x); |
6b61353c KH |
5317 | if (x0 > x1) |
5318 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5319 | ||
5320 | *x = it.hpos; | |
5321 | *y = it.vpos; | |
5322 | ||
5323 | return string; | |
5f5c8ee5 | 5324 | } |
4588ec20 | 5325 | |
5f5c8ee5 GM |
5326 | |
5327 | /* Value is the string under window-relative coordinates X/Y in the | |
6b61353c KH |
5328 | mode line or header line (PART says which) of window W, or nil if none. |
5329 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
5330 | |
5331 | Lisp_Object | |
ace1712c | 5332 | mode_line_string (struct window *w, enum window_part part, |
d311d28c | 5333 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5334 | int *dx, int *dy, int *width, int *height) |
5f5c8ee5 GM |
5335 | { |
5336 | struct glyph_row *row; | |
5337 | struct glyph *glyph, *end; | |
6b61353c | 5338 | int x0, y0; |
5f5c8ee5 GM |
5339 | Lisp_Object string = Qnil; |
5340 | ||
641bdbf3 | 5341 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
5342 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
5343 | else | |
045dee35 | 5344 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
6b61353c KH |
5345 | y0 = *y - row->y; |
5346 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
5f5c8ee5 GM |
5347 | |
5348 | if (row->mode_line_p && row->enabled_p) | |
4588ec20 | 5349 | { |
5f5c8ee5 GM |
5350 | /* Find the glyph under X. If we find one with a string object, |
5351 | it's the one we were looking for. */ | |
5352 | glyph = row->glyphs[TEXT_AREA]; | |
5353 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 5354 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5355 | x0 -= glyph->pixel_width; |
5356 | *x = glyph - row->glyphs[TEXT_AREA]; | |
5357 | if (glyph < end) | |
5358 | { | |
5359 | string = glyph->object; | |
5360 | *charpos = glyph->charpos; | |
5361 | *width = glyph->pixel_width; | |
5362 | *height = glyph->ascent + glyph->descent; | |
5363 | #ifdef HAVE_WINDOW_SYSTEM | |
5364 | if (glyph->type == IMAGE_GLYPH) | |
5365 | { | |
5366 | struct image *img; | |
5367 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5368 | if (img != NULL) | |
5369 | *object = img->spec; | |
5370 | y0 -= row->ascent - glyph->ascent; | |
5371 | } | |
5372 | #endif | |
5373 | } | |
5374 | else | |
5375 | { | |
5376 | /* Add extra (default width) columns if clicked after EOL. */ | |
5377 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5378 | *width = 0; | |
5379 | *height = row->height; | |
5380 | } | |
5381 | } | |
5382 | else | |
5383 | { | |
5384 | *x = 0; | |
5385 | x0 = 0; | |
5386 | *width = *height = 0; | |
4588ec20 | 5387 | } |
5f5c8ee5 | 5388 | |
6b61353c KH |
5389 | *dx = x0; |
5390 | *dy = y0; | |
5391 | ||
5f5c8ee5 | 5392 | return string; |
4588ec20 | 5393 | } |
5f5c8ee5 GM |
5394 | |
5395 | ||
db1db309 GM |
5396 | /* Value is the string under window-relative coordinates X/Y in either |
5397 | marginal area, or nil if none. *CHARPOS is set to the position in | |
5398 | the string returned. */ | |
5399 | ||
5400 | Lisp_Object | |
ace1712c | 5401 | marginal_area_string (struct window *w, enum window_part part, |
d311d28c | 5402 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5403 | int *dx, int *dy, int *width, int *height) |
db1db309 GM |
5404 | { |
5405 | struct glyph_row *row = w->current_matrix->rows; | |
5406 | struct glyph *glyph, *end; | |
6b61353c | 5407 | int x0, y0, i, wy = *y; |
641bdbf3 | 5408 | int area; |
db1db309 GM |
5409 | Lisp_Object string = Qnil; |
5410 | ||
641bdbf3 | 5411 | if (part == ON_LEFT_MARGIN) |
db1db309 | 5412 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 5413 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
5414 | area = RIGHT_MARGIN_AREA; |
5415 | else | |
1088b922 | 5416 | emacs_abort (); |
db1db309 GM |
5417 | |
5418 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
5419 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
5420 | break; | |
6b61353c KH |
5421 | y0 = *y - row->y; |
5422 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
db1db309 GM |
5423 | |
5424 | if (row->enabled_p) | |
5425 | { | |
5426 | /* Find the glyph under X. If we find one with a string object, | |
5427 | it's the one we were looking for. */ | |
db1db309 | 5428 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 5429 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5430 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5431 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) |
5432 | + window_box_width (w, LEFT_MARGIN_AREA) | |
5433 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 5434 | else |
7df02016 | 5435 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5436 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5437 | : 0); |
5438 | ||
6b61353c KH |
5439 | glyph = row->glyphs[area]; |
5440 | end = glyph + row->used[area]; | |
cfde341f | 5441 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5442 | x0 -= glyph->pixel_width; |
5443 | *x = glyph - row->glyphs[area]; | |
5444 | if (glyph < end) | |
5445 | { | |
5446 | string = glyph->object; | |
5447 | *charpos = glyph->charpos; | |
5448 | *width = glyph->pixel_width; | |
5449 | *height = glyph->ascent + glyph->descent; | |
5450 | #ifdef HAVE_WINDOW_SYSTEM | |
5451 | if (glyph->type == IMAGE_GLYPH) | |
5452 | { | |
5453 | struct image *img; | |
5454 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5455 | if (img != NULL) | |
5456 | *object = img->spec; | |
5457 | y0 -= row->ascent - glyph->ascent; | |
4be9765d KH |
5458 | x0 += glyph->slice.img.x; |
5459 | y0 += glyph->slice.img.y; | |
6b61353c KH |
5460 | } |
5461 | #endif | |
5462 | } | |
5463 | else | |
5464 | { | |
5465 | /* Add extra (default width) columns if clicked after EOL. */ | |
5466 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5467 | *width = 0; | |
5468 | *height = row->height; | |
5469 | } | |
db1db309 | 5470 | } |
6b61353c KH |
5471 | else |
5472 | { | |
5473 | x0 = 0; | |
5474 | *x = 0; | |
5475 | *width = *height = 0; | |
5476 | } | |
5477 | ||
5478 | *dx = x0; | |
5479 | *dy = y0; | |
db1db309 GM |
5480 | |
5481 | return string; | |
5482 | } | |
5483 | ||
5484 | ||
5f5c8ee5 GM |
5485 | /*********************************************************************** |
5486 | Changing Frame Sizes | |
5487 | ***********************************************************************/ | |
4588ec20 JB |
5488 | |
5489 | #ifdef SIGWINCH | |
5f5c8ee5 | 5490 | |
20ef56db PE |
5491 | static void deliver_window_change_signal (int); |
5492 | ||
9af30bdf | 5493 | static void |
20ef56db | 5494 | handle_window_change_signal (int sig) |
4588ec20 JB |
5495 | { |
5496 | int width, height; | |
28d7d09f | 5497 | struct tty_display_info *tty; |
4d553a13 | 5498 | |
9628b887 KL |
5499 | /* The frame size change obviously applies to a single |
5500 | termcap-controlled terminal, but we can't decide which. | |
5501 | Therefore, we resize the frames corresponding to each tty. | |
9628b887 KL |
5502 | */ |
5503 | for (tty = tty_list; tty; tty = tty->next) { | |
4588ec20 | 5504 | |
0a125897 KL |
5505 | if (! tty->term_initted) |
5506 | continue; | |
4588ec20 | 5507 | |
db878925 DN |
5508 | /* Suspended tty frames have tty->input == NULL avoid trying to |
5509 | use it. */ | |
5510 | if (!tty->input) | |
5511 | continue; | |
5512 | ||
0b0d3e0b | 5513 | get_tty_size (fileno (tty->input), &width, &height); |
3fc809e2 | 5514 | |
bedeffcf | 5515 | if (width > 5 && height > 2) { |
9628b887 | 5516 | Lisp_Object tail, frame; |
3fc809e2 | 5517 | |
9628b887 | 5518 | FOR_EACH_FRAME (tail, frame) |
4d553a13 KL |
5519 | if (FRAME_TERMCAP_P (XFRAME (frame)) && FRAME_TTY (XFRAME (frame)) == tty) |
5520 | /* Record the new sizes, but don't reallocate the data | |
5521 | structures now. Let that be done later outside of the | |
5522 | signal handler. */ | |
5523 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); | |
9628b887 | 5524 | } |
4588ec20 | 5525 | } |
20ef56db | 5526 | } |
3fc809e2 | 5527 | |
20ef56db PE |
5528 | static void |
5529 | deliver_window_change_signal (int sig) | |
5530 | { | |
4d7e6e51 | 5531 | deliver_process_signal (sig, handle_window_change_signal); |
4588ec20 JB |
5532 | } |
5533 | #endif /* SIGWINCH */ | |
5534 | ||
5535 | ||
59ea14cd PE |
5536 | /* Do any change in frame size that was requested by a signal. |
5537 | SAFE means this function is called from a place where it is | |
5538 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 5539 | |
dfcf069d | 5540 | void |
59ea14cd | 5541 | do_pending_window_change (bool safe) |
4588ec20 | 5542 | { |
20ef56db | 5543 | /* If window change signal handler should have run before, run it now. */ |
b96fd3e8 GM |
5544 | if (redisplaying_p && !safe) |
5545 | return; | |
177c0ea7 | 5546 | |
4588ec20 JB |
5547 | while (delayed_size_change) |
5548 | { | |
35f56f96 | 5549 | Lisp_Object tail, frame; |
4588ec20 JB |
5550 | |
5551 | delayed_size_change = 0; | |
5552 | ||
35f56f96 | 5553 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5554 | { |
5f5c8ee5 | 5555 | struct frame *f = XFRAME (frame); |
35f56f96 | 5556 | |
7df02016 KS |
5557 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
5558 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
5559 | 0, 0, safe); | |
4588ec20 JB |
5560 | } |
5561 | } | |
5562 | } | |
5563 | ||
5564 | ||
502b9b64 | 5565 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 5566 | indicate no change is to take place. |
4588ec20 | 5567 | |
59ea14cd PE |
5568 | If DELAY, assume we're being called from a signal handler, and |
5569 | queue the change for later - perhaps the next redisplay. | |
5570 | Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
5571 | from a signal handler. |
5572 | ||
59ea14cd | 5573 | SAFE means this function is called from a place where it's |
b96fd3e8 | 5574 | safe to change frame sizes while a redisplay is in progress. */ |
b6a65ac2 | 5575 | |
dfcf069d | 5576 | void |
59ea14cd PE |
5577 | change_frame_size (struct frame *f, int newheight, int newwidth, |
5578 | bool pretend, bool delay, bool safe) | |
45140e01 RS |
5579 | { |
5580 | Lisp_Object tail, frame; | |
3826ea1a | 5581 | |
9628b887 | 5582 | if (FRAME_MSDOS_P (f)) |
45140e01 | 5583 | { |
9628b887 KL |
5584 | /* On MS-DOS, all frames use the same screen, so a change in |
5585 | size affects all frames. Termcap now supports multiple | |
5586 | ttys. */ | |
45140e01 | 5587 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 5588 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 5589 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 5590 | pretend, delay, safe); |
45140e01 RS |
5591 | } |
5592 | else | |
b96fd3e8 | 5593 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
5594 | } |
5595 | ||
5596 | static void | |
59ea14cd PE |
5597 | change_frame_size_1 (struct frame *f, int newheight, int newwidth, |
5598 | bool pretend, bool delay, bool safe) | |
4588ec20 | 5599 | { |
7df02016 | 5600 | int new_frame_total_cols; |
d311d28c | 5601 | ptrdiff_t count = SPECPDL_INDEX (); |
3826ea1a | 5602 | |
4588ec20 | 5603 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 5604 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 5605 | { |
7df02016 KS |
5606 | f->new_text_lines = newheight; |
5607 | f->new_text_cols = newwidth; | |
4588ec20 JB |
5608 | delayed_size_change = 1; |
5609 | return; | |
5610 | } | |
5611 | ||
502b9b64 | 5612 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
5613 | f->new_text_lines = 0; |
5614 | f->new_text_cols = 0; | |
b6a65ac2 | 5615 | |
08f7aa3e | 5616 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 5617 | if (newheight == 0) |
7df02016 | 5618 | newheight = FRAME_LINES (f); |
ae19c6f2 | 5619 | if (newwidth == 0) |
7df02016 | 5620 | newwidth = FRAME_COLS (f); |
3826ea1a | 5621 | |
3b95a6f9 | 5622 | /* Compute width of windows in F. */ |
b6a65ac2 | 5623 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 5624 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 | 5625 | |
3b95a6f9 MR |
5626 | /* This is the width of the frame with vertical scroll bars and fringe |
5627 | columns. Do this after rounding - see discussion of bug#9723. */ | |
5628 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); | |
5629 | ||
b6a65ac2 | 5630 | /* If we're not changing the frame size, quit now. */ |
3b95a6f9 MR |
5631 | /* Frame width may be unchanged but the text portion may change, for |
5632 | example, fullscreen and remove/add scroll bar. */ | |
7df02016 | 5633 | if (newheight == FRAME_LINES (f) |
3b95a6f9 MR |
5634 | /* Text portion unchanged? */ |
5635 | && newwidth == FRAME_COLS (f) | |
5636 | /* Frame width unchanged? */ | |
5637 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) | |
4588ec20 JB |
5638 | return; |
5639 | ||
4d7e6e51 | 5640 | block_input (); |
cbb95688 | 5641 | |
886a8a6c KH |
5642 | #ifdef MSDOS |
5643 | /* We only can set screen dimensions to certain values supported | |
5644 | by our video hardware. Try to find the smallest size greater | |
5645 | or equal to the requested dimensions. */ | |
5646 | dos_set_window_size (&newheight, &newwidth); | |
5647 | #endif | |
5648 | ||
7df02016 | 5649 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 5650 | { |
562dd5e9 | 5651 | resize_frame_windows (f, newheight, 0); |
b6a65ac2 | 5652 | |
48e482e6 EZ |
5653 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5654 | manipulating video hardware. */ | |
5655 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5656 | FrameRows (FRAME_TTY (f)) = newheight; |
4588ec20 JB |
5657 | } |
5658 | ||
7df02016 | 5659 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 5660 | { |
562dd5e9 | 5661 | resize_frame_windows (f, new_frame_total_cols, 1); |
4588ec20 | 5662 | |
48e482e6 EZ |
5663 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5664 | manipulating video hardware. */ | |
5665 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5666 | FrameCols (FRAME_TTY (f)) = newwidth; |
5f5c8ee5 | 5667 | |
e69b0960 | 5668 | if (WINDOWP (f->tool_bar_window)) |
e8c17b81 | 5669 | wset_total_cols (XWINDOW (f->tool_bar_window), make_number (newwidth)); |
4588ec20 JB |
5670 | } |
5671 | ||
7df02016 KS |
5672 | FRAME_LINES (f) = newheight; |
5673 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 5674 | |
5f5c8ee5 GM |
5675 | { |
5676 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
5677 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 5678 | |
5f5c8ee5 GM |
5679 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
5680 | &text_area_height); | |
5681 | if (w->cursor.x >= text_area_x + text_area_width) | |
5682 | w->cursor.hpos = w->cursor.x = 0; | |
5683 | if (w->cursor.y >= text_area_y + text_area_height) | |
5684 | w->cursor.vpos = w->cursor.y = 0; | |
5685 | } | |
986e61b8 | 5686 | |
5f5c8ee5 | 5687 | adjust_glyphs (f); |
5f5c8ee5 | 5688 | calculate_costs (f); |
cb02fa39 GM |
5689 | SET_FRAME_GARBAGED (f); |
5690 | f->resized_p = 1; | |
97cf50e7 | 5691 | |
4d7e6e51 | 5692 | unblock_input (); |
61730a69 | 5693 | |
66322887 | 5694 | record_unwind_current_buffer (); |
e523f7e5 | 5695 | |
ef264c42 | 5696 | run_window_configuration_change_hook (f); |
e523f7e5 RS |
5697 | |
5698 | unbind_to (count, Qnil); | |
4588ec20 | 5699 | } |
5f5c8ee5 GM |
5700 | |
5701 | ||
4588ec20 | 5702 | \f |
5f5c8ee5 GM |
5703 | /*********************************************************************** |
5704 | Terminal Related Lisp Functions | |
5705 | ***********************************************************************/ | |
5706 | ||
5707 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 5708 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
5709 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
5710 | FILE = nil means just close any termscript file currently open. */) | |
5842a27b | 5711 | (Lisp_Object file) |
5f5c8ee5 | 5712 | { |
0b0d3e0b KL |
5713 | struct tty_display_info *tty; |
5714 | ||
7d2f1216 EZ |
5715 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ()) |
5716 | && ! FRAME_MSDOS_P (SELECTED_FRAME ())) | |
0b0d3e0b KL |
5717 | error ("Current frame is not on a tty device"); |
5718 | ||
5719 | tty = CURTTY (); | |
5720 | ||
5721 | if (tty->termscript != 0) | |
e18c7093 | 5722 | { |
4d7e6e51 | 5723 | block_input (); |
0b0d3e0b | 5724 | fclose (tty->termscript); |
4d7e6e51 | 5725 | unblock_input (); |
e18c7093 | 5726 | } |
0b0d3e0b | 5727 | tty->termscript = 0; |
5f5c8ee5 GM |
5728 | |
5729 | if (! NILP (file)) | |
5730 | { | |
5731 | file = Fexpand_file_name (file, Qnil); | |
42a5b22f | 5732 | tty->termscript = fopen (SSDATA (file), "w"); |
0b0d3e0b | 5733 | if (tty->termscript == 0) |
5f5c8ee5 GM |
5734 | report_file_error ("Opening termscript", Fcons (file, Qnil)); |
5735 | } | |
5736 | return Qnil; | |
5737 | } | |
5738 | ||
5739 | ||
4588ec20 | 5740 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
62af879c | 5741 | Ssend_string_to_terminal, 1, 2, 0, |
7ee72033 | 5742 | doc: /* Send STRING to the terminal without alteration. |
62af879c KL |
5743 | Control characters in STRING will have terminal-dependent effects. |
5744 | ||
6ed8eeff | 5745 | Optional parameter TERMINAL specifies the tty terminal device to use. |
558759e4 AM |
5746 | It may be a terminal object, a frame, or nil for the terminal used by |
5747 | the currently selected frame. In batch mode, STRING is sent to stdout | |
5748 | when TERMINAL is nil. */) | |
5842a27b | 5749 | (Lisp_Object string, Lisp_Object terminal) |
4588ec20 | 5750 | { |
7cef7ce3 SM |
5751 | struct terminal *t = get_terminal (terminal, 1); |
5752 | FILE *out; | |
0b0d3e0b | 5753 | |
94f3db62 | 5754 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 5755 | CHECK_STRING (string); |
4d7e6e51 | 5756 | block_input (); |
0b0d3e0b | 5757 | |
6ed8eeff KL |
5758 | if (!t) |
5759 | error ("Unknown terminal device"); | |
0b0d3e0b | 5760 | |
7cef7ce3 SM |
5761 | if (t->type == output_initial) |
5762 | out = stdout; | |
5763 | else if (t->type != output_termcap && t->type != output_msdos_raw) | |
5764 | error ("Device %d is not a termcap terminal device", t->id); | |
5765 | else | |
5766 | { | |
5767 | struct tty_display_info *tty = t->display_info.tty; | |
3fc809e2 | 5768 | |
7cef7ce3 SM |
5769 | if (! tty->output) |
5770 | error ("Terminal is currently suspended"); | |
cecfdea6 | 5771 | |
7cef7ce3 SM |
5772 | if (tty->termscript) |
5773 | { | |
5774 | fwrite (SDATA (string), 1, SBYTES (string), tty->termscript); | |
5775 | fflush (tty->termscript); | |
5776 | } | |
5777 | out = tty->output; | |
4588ec20 | 5778 | } |
7cef7ce3 SM |
5779 | fwrite (SDATA (string), 1, SBYTES (string), out); |
5780 | fflush (out); | |
4d7e6e51 | 5781 | unblock_input (); |
4588ec20 JB |
5782 | return Qnil; |
5783 | } | |
5784 | ||
5f5c8ee5 | 5785 | |
a7ca3326 | 5786 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 5787 | doc: /* Beep, or flash the screen. |
228299fa | 5788 | Also, unless an argument is given, |
7ee72033 | 5789 | terminate any keyboard macro currently executing. */) |
5842a27b | 5790 | (Lisp_Object arg) |
4588ec20 | 5791 | { |
efb859b4 | 5792 | if (!NILP (arg)) |
4588ec20 | 5793 | { |
7fa788da RS |
5794 | if (noninteractive) |
5795 | putchar (07); | |
5796 | else | |
385ed61f | 5797 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5798 | } |
5799 | else | |
5800 | bitch_at_user (); | |
5801 | ||
5802 | return Qnil; | |
5803 | } | |
5804 | ||
dfcf069d | 5805 | void |
971de7fb | 5806 | bitch_at_user (void) |
4588ec20 JB |
5807 | { |
5808 | if (noninteractive) | |
5809 | putchar (07); | |
5f5c8ee5 | 5810 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
4588ec20 JB |
5811 | error ("Keyboard macro terminated by a command ringing the bell"); |
5812 | else | |
385ed61f | 5813 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5814 | } |
5815 | ||
5f5c8ee5 GM |
5816 | |
5817 | \f | |
5818 | /*********************************************************************** | |
5819 | Sleeping, Waiting | |
5820 | ***********************************************************************/ | |
5821 | ||
a7ca3326 | 5822 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 5823 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
5824 | SECONDS may be a floating-point value, meaning that you can wait for a |
5825 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
d35af63c | 5826 | additional wait period, in milliseconds; this is for backwards compatibility. |
7ee72033 | 5827 | \(Not all operating systems support waiting for a fraction of a second.) */) |
5842a27b | 5828 | (Lisp_Object seconds, Lisp_Object milliseconds) |
4588ec20 | 5829 | { |
d311d28c | 5830 | double duration = extract_float (seconds); |
4588ec20 | 5831 | |
d311d28c PE |
5832 | if (!NILP (milliseconds)) |
5833 | { | |
5834 | CHECK_NUMBER (milliseconds); | |
5835 | duration += XINT (milliseconds) / 1000.0; | |
5836 | } | |
b07646f5 | 5837 | |
d35af63c PE |
5838 | if (0 < duration) |
5839 | { | |
5840 | EMACS_TIME t = EMACS_TIME_FROM_DOUBLE (duration); | |
f1dd8073 | 5841 | wait_reading_process_output (min (EMACS_SECS (t), WAIT_READING_MAX), |
d35af63c PE |
5842 | EMACS_NSECS (t), 0, 0, Qnil, NULL, 0); |
5843 | } | |
4588ec20 JB |
5844 | |
5845 | return Qnil; | |
5846 | } | |
5847 | ||
5f5c8ee5 | 5848 | |
dcd1ca45 | 5849 | /* This is just like wait_reading_process_output, except that |
902b9b6d | 5850 | it does redisplay. |
f76475ad | 5851 | |
2bcac766 CY |
5852 | TIMEOUT is number of seconds to wait (float or integer), |
5853 | or t to wait forever. | |
59ea14cd | 5854 | READING is true if reading input. |
9fa1de30 PE |
5855 | If DISPLAY_OPTION is >0 display process output while waiting. |
5856 | If DISPLAY_OPTION is >1 perform an initial redisplay before waiting. | |
902b9b6d | 5857 | */ |
4588ec20 | 5858 | |
f76475ad | 5859 | Lisp_Object |
9fa1de30 | 5860 | sit_for (Lisp_Object timeout, bool reading, int display_option) |
f76475ad | 5861 | { |
d35af63c PE |
5862 | intmax_t sec; |
5863 | int nsec; | |
9fa1de30 | 5864 | bool do_display = display_option > 0; |
f222369e | 5865 | |
902b9b6d | 5866 | swallow_events (do_display); |
ccddf474 | 5867 | |
902b9b6d | 5868 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 5869 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 5870 | return Qnil; |
4588ec20 | 5871 | |
9fa1de30 | 5872 | if (display_option > 1) |
902b9b6d KS |
5873 | redisplay_preserve_echo_area (2); |
5874 | ||
d35af63c | 5875 | if (INTEGERP (timeout)) |
2bcac766 | 5876 | { |
d35af63c PE |
5877 | sec = XINT (timeout); |
5878 | if (! (0 < sec)) | |
5879 | return Qt; | |
5880 | nsec = 0; | |
2bcac766 | 5881 | } |
d35af63c | 5882 | else if (FLOATP (timeout)) |
d311d28c | 5883 | { |
d35af63c PE |
5884 | double seconds = XFLOAT_DATA (timeout); |
5885 | if (! (0 < seconds)) | |
d311d28c | 5886 | return Qt; |
d35af63c PE |
5887 | else |
5888 | { | |
5889 | EMACS_TIME t = EMACS_TIME_FROM_DOUBLE (seconds); | |
f1dd8073 | 5890 | sec = min (EMACS_SECS (t), WAIT_READING_MAX); |
d35af63c PE |
5891 | nsec = EMACS_NSECS (t); |
5892 | } | |
5893 | } | |
5894 | else if (EQ (timeout, Qt)) | |
5895 | { | |
5896 | sec = 0; | |
5897 | nsec = 0; | |
d311d28c | 5898 | } |
d35af63c PE |
5899 | else |
5900 | wrong_type_argument (Qnumberp, timeout); | |
5901 | ||
dfdb645c | 5902 | |
4a4bbad2 | 5903 | #ifdef USABLE_SIGIO |
f75beb47 | 5904 | gobble_input (); |
f76475ad JB |
5905 | #endif |
5906 | ||
d35af63c | 5907 | wait_reading_process_output (sec, nsec, reading ? -1 : 1, do_display, |
dcd1ca45 | 5908 | Qnil, NULL, 0); |
f76475ad | 5909 | |
4588ec20 JB |
5910 | return detect_input_pending () ? Qnil : Qt; |
5911 | } | |
5912 | ||
5f5c8ee5 | 5913 | |
a7ca3326 | 5914 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
025de85b CY |
5915 | doc: /* Perform redisplay. |
5916 | Optional arg FORCE, if non-nil, prevents redisplay from being | |
5917 | preempted by arriving input, even if `redisplay-dont-pause' is nil. | |
5918 | If `redisplay-dont-pause' is non-nil (the default), redisplay is never | |
5919 | preempted by arriving input, so FORCE does nothing. | |
5920 | ||
5921 | Return t if redisplay was performed, nil if redisplay was preempted | |
5922 | immediately by pending input. */) | |
5842a27b | 5923 | (Lisp_Object force) |
f76475ad | 5924 | { |
d311d28c | 5925 | ptrdiff_t count; |
659d9874 | 5926 | |
902b9b6d KS |
5927 | swallow_events (1); |
5928 | if ((detect_input_pending_run_timers (1) | |
01327edf | 5929 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
5930 | || !NILP (Vexecuting_kbd_macro)) |
5931 | return Qnil; | |
f76475ad | 5932 | |
01327edf KS |
5933 | count = SPECPDL_INDEX (); |
5934 | if (!NILP (force) && !redisplay_dont_pause) | |
5935 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 5936 | redisplay_preserve_echo_area (2); |
01327edf | 5937 | unbind_to (count, Qnil); |
7ba07a1a | 5938 | return Qt; |
f76475ad | 5939 | } |
5f5c8ee5 GM |
5940 | |
5941 | ||
5942 | \f | |
5943 | /*********************************************************************** | |
5944 | Other Lisp Functions | |
5945 | ***********************************************************************/ | |
5946 | ||
5947 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
5948 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 5949 | buffer-modified-flags. */ |
5f5c8ee5 GM |
5950 | |
5951 | static Lisp_Object frame_and_buffer_state; | |
5952 | ||
5953 | ||
5954 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 5955 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 5956 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
5957 | VARIABLE is a variable name whose value is either nil or a state vector |
5958 | that will be updated to contain all frames and buffers, | |
228299fa | 5959 | aside from buffers whose names start with space, |
44edd521 RS |
5960 | along with the buffers' read-only and modified flags. This allows a fast |
5961 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 5962 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
5963 | the current state. |
5964 | ||
5965 | If VARIABLE is nil, an internal variable is used. Users should not | |
5966 | pass nil for VARIABLE. */) | |
5842a27b | 5967 | (Lisp_Object variable) |
5f5c8ee5 | 5968 | { |
44edd521 | 5969 | Lisp_Object state, tail, frame, buf; |
086ca913 | 5970 | ptrdiff_t n, idx; |
5f5c8ee5 | 5971 | |
44edd521 RS |
5972 | if (! NILP (variable)) |
5973 | { | |
5974 | CHECK_SYMBOL (variable); | |
5975 | state = Fsymbol_value (variable); | |
5976 | if (! VECTORP (state)) | |
5977 | goto changed; | |
5978 | } | |
5979 | else | |
5980 | state = frame_and_buffer_state; | |
5981 | ||
086ca913 | 5982 | idx = 0; |
5f5c8ee5 GM |
5983 | FOR_EACH_FRAME (tail, frame) |
5984 | { | |
086ca913 | 5985 | if (idx == ASIZE (state)) |
44edd521 | 5986 | goto changed; |
086ca913 | 5987 | if (!EQ (AREF (state, idx++), frame)) |
5f5c8ee5 | 5988 | goto changed; |
086ca913 | 5989 | if (idx == ASIZE (state)) |
44edd521 | 5990 | goto changed; |
086ca913 | 5991 | if (!EQ (AREF (state, idx++), XFRAME (frame)->name)) |
5f5c8ee5 GM |
5992 | goto changed; |
5993 | } | |
44edd521 | 5994 | /* Check that the buffer info matches. */ |
7539e11f | 5995 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 5996 | { |
7539e11f | 5997 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 5998 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 5999 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 6000 | continue; |
086ca913 | 6001 | if (idx == ASIZE (state)) |
44edd521 | 6002 | goto changed; |
086ca913 | 6003 | if (!EQ (AREF (state, idx++), buf)) |
5f5c8ee5 | 6004 | goto changed; |
086ca913 | 6005 | if (idx == ASIZE (state)) |
44edd521 | 6006 | goto changed; |
086ca913 | 6007 | if (!EQ (AREF (state, idx++), BVAR (XBUFFER (buf), read_only))) |
5f5c8ee5 | 6008 | goto changed; |
086ca913 | 6009 | if (idx == ASIZE (state)) |
44edd521 | 6010 | goto changed; |
086ca913 | 6011 | if (!EQ (AREF (state, idx++), Fbuffer_modified_p (buf))) |
5f5c8ee5 GM |
6012 | goto changed; |
6013 | } | |
086ca913 | 6014 | if (idx == ASIZE (state)) |
44edd521 | 6015 | goto changed; |
5f5c8ee5 | 6016 | /* Detect deletion of a buffer at the end of the list. */ |
086ca913 | 6017 | if (EQ (AREF (state, idx), Qlambda)) |
5f5c8ee5 | 6018 | return Qnil; |
44edd521 RS |
6019 | |
6020 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 6021 | changed: |
44edd521 RS |
6022 | /* Count the size we will need. |
6023 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
6024 | n = 1; |
6025 | FOR_EACH_FRAME (tail, frame) | |
6026 | n += 2; | |
7539e11f | 6027 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6028 | n += 3; |
44edd521 RS |
6029 | /* Reallocate the vector if data has grown to need it, |
6030 | or if it has shrunk a lot. */ | |
6031 | if (! VECTORP (state) | |
77b37c05 PE |
6032 | || n > ASIZE (state) |
6033 | || n + 20 < ASIZE (state) / 2) | |
5f5c8ee5 | 6034 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
6035 | { |
6036 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
6037 | if (! NILP (variable)) | |
6038 | Fset (variable, state); | |
6039 | else | |
6040 | frame_and_buffer_state = state; | |
6041 | } | |
6042 | ||
6043 | /* Record the new data in the (possibly reallocated) vector. */ | |
086ca913 | 6044 | idx = 0; |
5f5c8ee5 GM |
6045 | FOR_EACH_FRAME (tail, frame) |
6046 | { | |
086ca913 DA |
6047 | ASET (state, idx, frame); |
6048 | idx++; | |
6049 | ASET (state, idx, XFRAME (frame)->name); | |
6050 | idx++; | |
5f5c8ee5 | 6051 | } |
7539e11f | 6052 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6053 | { |
7539e11f | 6054 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6055 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 6056 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 6057 | continue; |
086ca913 DA |
6058 | ASET (state, idx, buf); |
6059 | idx++; | |
6060 | ASET (state, idx, BVAR (XBUFFER (buf), read_only)); | |
6061 | idx++; | |
6062 | ASET (state, idx, Fbuffer_modified_p (buf)); | |
6063 | idx++; | |
5f5c8ee5 GM |
6064 | } |
6065 | /* Fill up the vector with lambdas (always at least one). */ | |
086ca913 DA |
6066 | ASET (state, idx, Qlambda); |
6067 | idx++; | |
6068 | while (idx < ASIZE (state)) | |
6069 | { | |
6070 | ASET (state, idx, Qlambda); | |
6071 | idx++; | |
6072 | } | |
5f5c8ee5 | 6073 | /* Make sure we didn't overflow the vector. */ |
086ca913 | 6074 | eassert (idx <= ASIZE (state)); |
5f5c8ee5 GM |
6075 | return Qt; |
6076 | } | |
6077 | ||
6078 | ||
4588ec20 | 6079 | \f |
5f5c8ee5 GM |
6080 | /*********************************************************************** |
6081 | Initialization | |
6082 | ***********************************************************************/ | |
6083 | ||
5f5c8ee5 GM |
6084 | /* Initialization done when Emacs fork is started, before doing stty. |
6085 | Determine terminal type and set terminal_driver. Then invoke its | |
6086 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 6087 | |
dfcf069d | 6088 | void |
971de7fb | 6089 | init_display (void) |
4588ec20 | 6090 | { |
28d440ab KL |
6091 | char *terminal_type; |
6092 | ||
5f5c8ee5 GM |
6093 | /* Construct the space glyph. */ |
6094 | space_glyph.type = CHAR_GLYPH; | |
3fc809e2 | 6095 | SET_CHAR_GLYPH (space_glyph, ' ', DEFAULT_FACE_ID, 0); |
5f5c8ee5 GM |
6096 | space_glyph.charpos = -1; |
6097 | ||
4588ec20 JB |
6098 | inverse_video = 0; |
6099 | cursor_in_echo_area = 0; | |
6100 | terminal_type = (char *) 0; | |
6101 | ||
1315c181 JB |
6102 | /* Now is the time to initialize this; it's used by init_sys_modes |
6103 | during startup. */ | |
2246281f | 6104 | Vinitial_window_system = Qnil; |
4588ec20 | 6105 | |
4181ad9c KL |
6106 | /* SIGWINCH needs to be handled no matter what display we start |
6107 | with. Otherwise newly opened tty frames will not resize | |
6108 | automatically. */ | |
6109 | #ifdef SIGWINCH | |
6110 | #ifndef CANNOT_DUMP | |
6111 | if (initialized) | |
6112 | #endif /* CANNOT_DUMP */ | |
2fe28299 PE |
6113 | { |
6114 | struct sigaction action; | |
6115 | emacs_sigaction_init (&action, deliver_window_change_signal); | |
6116 | sigaction (SIGWINCH, &action, 0); | |
6117 | } | |
4181ad9c | 6118 | #endif /* SIGWINCH */ |
4588ec20 | 6119 | |
d6ef42b9 | 6120 | /* If running as a daemon, no need to initialize any frames/terminal. */ |
ff808935 DN |
6121 | if (IS_DAEMON) |
6122 | return; | |
d6ef42b9 | 6123 | |
1315c181 JB |
6124 | /* If the user wants to use a window system, we shouldn't bother |
6125 | initializing the terminal. This is especially important when the | |
6126 | terminal is so dumb that emacs gives up before and doesn't bother | |
6127 | using the window system. | |
4588ec20 | 6128 | |
36bbad1d KH |
6129 | If the DISPLAY environment variable is set and nonempty, |
6130 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6131 | |
6132 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 6133 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 6134 | { |
36bbad1d | 6135 | char *display; |
36bbad1d | 6136 | display = getenv ("DISPLAY"); |
36bbad1d | 6137 | display_arg = (display != 0 && *display != 0); |
c1fc674b AS |
6138 | |
6139 | if (display_arg && !x_display_ok (display)) | |
6140 | { | |
6141 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
6142 | display); | |
6143 | inhibit_window_system = 1; | |
6144 | } | |
f040093a | 6145 | } |
d460af17 | 6146 | |
4fcc2638 | 6147 | if (!inhibit_window_system && display_arg) |
4588ec20 | 6148 | { |
111d9af3 | 6149 | Vinitial_window_system = Qx; |
4588ec20 JB |
6150 | #ifdef HAVE_X11 |
6151 | Vwindow_system_version = make_number (11); | |
039e5d71 | 6152 | #endif |
9311dcff | 6153 | #ifdef GNU_LINUX |
039e5d71 | 6154 | /* In some versions of ncurses, |
6a428f77 | 6155 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6156 | So call tgetent. */ |
6157 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 JB |
6158 | #endif |
6159 | return; | |
6160 | } | |
6161 | #endif /* HAVE_X_WINDOWS */ | |
6162 | ||
fd2e066a | 6163 | #ifdef HAVE_NTGUI |
177c0ea7 | 6164 | if (!inhibit_window_system) |
fd2e066a | 6165 | { |
111d9af3 | 6166 | Vinitial_window_system = Qw32; |
fd2e066a GV |
6167 | Vwindow_system_version = make_number (1); |
6168 | return; | |
6169 | } | |
6170 | #endif /* HAVE_NTGUI */ | |
6171 | ||
edfda783 AR |
6172 | #ifdef HAVE_NS |
6173 | if (!inhibit_window_system | |
6174 | #ifndef CANNOT_DUMP | |
6175 | && initialized | |
6176 | #endif | |
6177 | ) | |
6178 | { | |
111d9af3 | 6179 | Vinitial_window_system = Qns; |
5e617bc2 | 6180 | Vwindow_system_version = make_number (10); |
edfda783 AR |
6181 | return; |
6182 | } | |
6183 | #endif | |
6184 | ||
4588ec20 JB |
6185 | /* If no window system has been specified, try to use the terminal. */ |
6186 | if (! isatty (0)) | |
6187 | { | |
1559a86d | 6188 | fatal ("standard input is not a tty"); |
4588ec20 JB |
6189 | exit (1); |
6190 | } | |
6191 | ||
6152361f JR |
6192 | #ifdef WINDOWSNT |
6193 | terminal_type = "w32console"; | |
6194 | #else | |
153a073c | 6195 | /* Look at the TERM variable. */ |
4588ec20 | 6196 | terminal_type = (char *) getenv ("TERM"); |
6152361f | 6197 | #endif |
4588ec20 JB |
6198 | if (!terminal_type) |
6199 | { | |
5d12ff0b | 6200 | #ifdef HAVE_WINDOW_SYSTEM |
b9e590fc RS |
6201 | if (! inhibit_window_system) |
6202 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6203 | else |
6204 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6205 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
4588ec20 JB |
6206 | exit (1); |
6207 | } | |
6208 | ||
0a125897 | 6209 | { |
6ed8eeff | 6210 | struct terminal *t; |
3224dac1 KL |
6211 | struct frame *f = XFRAME (selected_frame); |
6212 | ||
322aea6d PE |
6213 | init_foreground_group (); |
6214 | ||
3224dac1 | 6215 | /* Open a display on the controlling tty. */ |
6ed8eeff | 6216 | t = init_tty (0, terminal_type, 1); /* Errors are fatal. */ |
3224dac1 KL |
6217 | |
6218 | /* Convert the initial frame to use the new display. */ | |
b04f5ad2 | 6219 | if (f->output_method != output_initial) |
1088b922 | 6220 | emacs_abort (); |
6ed8eeff KL |
6221 | f->output_method = t->type; |
6222 | f->terminal = t; | |
3224dac1 | 6223 | |
6ed8eeff | 6224 | t->reference_count++; |
7ac5dac9 EZ |
6225 | #ifdef MSDOS |
6226 | f->output_data.tty->display_info = &the_only_display_info; | |
6227 | #else | |
6228 | if (f->output_method == output_termcap) | |
6229 | create_tty_output (f); | |
6230 | #endif | |
6ed8eeff | 6231 | t->display_info.tty->top_frame = selected_frame; |
5b65d888 | 6232 | change_frame_size (XFRAME (selected_frame), |
6ed8eeff KL |
6233 | FrameRows (t->display_info.tty), |
6234 | FrameCols (t->display_info.tty), 0, 0, 1); | |
3224dac1 | 6235 | |
6ed8eeff KL |
6236 | /* Delete the initial terminal. */ |
6237 | if (--initial_terminal->reference_count == 0 | |
6238 | && initial_terminal->delete_terminal_hook) | |
6239 | (*initial_terminal->delete_terminal_hook) (initial_terminal); | |
2666355c KL |
6240 | |
6241 | /* Update frame parameters to reflect the new type. */ | |
6242 | Fmodify_frame_parameters | |
6243 | (selected_frame, Fcons (Fcons (Qtty_type, | |
6ed8eeff | 6244 | Ftty_type (selected_frame)), Qnil)); |
657ceaa0 EZ |
6245 | if (t->display_info.tty->name) |
6246 | Fmodify_frame_parameters (selected_frame, | |
6247 | Fcons (Fcons (Qtty, build_string (t->display_info.tty->name)), | |
6248 | Qnil)); | |
6249 | else | |
6250 | Fmodify_frame_parameters (selected_frame, Fcons (Fcons (Qtty, Qnil), | |
6251 | Qnil)); | |
0a125897 | 6252 | } |
3fc809e2 | 6253 | |
d86c299a | 6254 | { |
91fb7e1b | 6255 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6256 | int width = FRAME_TOTAL_COLS (sf); |
6257 | int height = FRAME_LINES (sf); | |
d86c299a | 6258 | |
5f5c8ee5 | 6259 | /* If these sizes are so big they cause overflow, just ignore the |
dfd153ae PE |
6260 | change. It's not clear what better we could do. The rest of |
6261 | the code assumes that (width + 2) * height * sizeof (struct glyph) | |
6262 | does not overflow and does not exceed PTRDIFF_MAX or SIZE_MAX. */ | |
e3c25c68 PE |
6263 | if (INT_ADD_RANGE_OVERFLOW (width, 2, INT_MIN, INT_MAX) |
6264 | || INT_MULTIPLY_RANGE_OVERFLOW (width + 2, height, INT_MIN, INT_MAX) | |
dfd153ae PE |
6265 | || (min (PTRDIFF_MAX, SIZE_MAX) / sizeof (struct glyph) |
6266 | < (width + 2) * height)) | |
1559a86d | 6267 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6268 | } |
6269 | ||
91fb7e1b | 6270 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6271 | |
5f5c8ee5 GM |
6272 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ |
6273 | if (initialized | |
6274 | && !noninteractive | |
2246281f | 6275 | && NILP (Vinitial_window_system)) |
2d764c78 EZ |
6276 | { |
6277 | /* For the initial frame, we don't have any way of knowing what | |
6278 | are the foreground and background colors of the terminal. */ | |
5e617bc2 | 6279 | struct frame *sf = SELECTED_FRAME (); |
2d764c78 | 6280 | |
f9d2fdc4 EZ |
6281 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
6282 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
6283 | call0 (intern ("tty-set-up-initial-frame-faces")); |
6284 | } | |
5f5c8ee5 GM |
6285 | } |
6286 | ||
6287 | ||
6288 | \f | |
6289 | /*********************************************************************** | |
6290 | Blinking cursor | |
6291 | ***********************************************************************/ | |
6292 | ||
c3f13540 | 6293 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 6294 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 6295 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
6296 | WINDOW nil means use the selected window. SHOW non-nil means |
6297 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 | 6298 | don't show a cursor. */) |
5842a27b | 6299 | (Lisp_Object window, Lisp_Object show) |
5f5c8ee5 | 6300 | { |
5f5c8ee5 GM |
6301 | /* Don't change cursor state while redisplaying. This could confuse |
6302 | output routines. */ | |
6303 | if (!redisplaying_p) | |
b9e9df47 | 6304 | decode_any_window (window)->cursor_off_p = NILP (show); |
5f5c8ee5 | 6305 | return Qnil; |
4588ec20 | 6306 | } |
5f5c8ee5 GM |
6307 | |
6308 | ||
5d7791b3 GM |
6309 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
6310 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 6311 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 | 6312 | WINDOW nil or omitted means report on the selected window. */) |
5842a27b | 6313 | (Lisp_Object window) |
5d7791b3 | 6314 | { |
b9e9df47 | 6315 | return decode_any_window (window)->cursor_off_p ? Qnil : Qt; |
5d7791b3 GM |
6316 | } |
6317 | ||
87478b52 SM |
6318 | DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame, |
6319 | Slast_nonminibuf_frame, 0, 0, 0, | |
6320 | doc: /* Value is last nonminibuffer frame. */) | |
5842a27b | 6321 | (void) |
87478b52 | 6322 | { |
4958ed94 | 6323 | Lisp_Object frame = Qnil; |
87478b52 | 6324 | |
4958ed94 SM |
6325 | if (last_nonminibuf_frame) |
6326 | XSETFRAME (frame, last_nonminibuf_frame); | |
87478b52 SM |
6327 | |
6328 | return frame; | |
6329 | } | |
4588ec20 | 6330 | \f |
5f5c8ee5 GM |
6331 | /*********************************************************************** |
6332 | Initialization | |
6333 | ***********************************************************************/ | |
6334 | ||
dfcf069d | 6335 | void |
971de7fb | 6336 | syms_of_display (void) |
4588ec20 | 6337 | { |
502b9b64 | 6338 | defsubr (&Sredraw_frame); |
4588ec20 | 6339 | defsubr (&Sredraw_display); |
078b3696 | 6340 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
6341 | defsubr (&Sopen_termscript); |
6342 | defsubr (&Sding); | |
7ba07a1a | 6343 | defsubr (&Sredisplay); |
4588ec20 JB |
6344 | defsubr (&Ssleep_for); |
6345 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 6346 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 6347 | defsubr (&Sinternal_show_cursor_p); |
87478b52 | 6348 | defsubr (&Slast_nonminibuf_frame); |
4588ec20 | 6349 | |
e509cfa6 | 6350 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
6351 | defsubr (&Sdump_redisplay_history); |
6352 | #endif | |
6353 | ||
d1dad759 | 6354 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
6355 | staticpro (&frame_and_buffer_state); |
6356 | ||
cd3520a4 JB |
6357 | DEFSYM (Qdisplay_table, "display-table"); |
6358 | DEFSYM (Qredisplay_dont_pause, "redisplay-dont-pause"); | |
9cda4f7c | 6359 | |
29208e82 | 6360 | DEFVAR_INT ("baud-rate", baud_rate, |
025de85b | 6361 | doc: /* The output baud rate of the terminal. |
228299fa GM |
6362 | On most systems, changing this value will affect the amount of padding |
6363 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 6364 | |
29208e82 | 6365 | DEFVAR_BOOL ("inverse-video", inverse_video, |
025de85b | 6366 | doc: /* Non-nil means invert the entire frame display. |
228299fa | 6367 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 6368 | |
29208e82 | 6369 | DEFVAR_BOOL ("visible-bell", visible_bell, |
025de85b | 6370 | doc: /* Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
6371 | |
6372 | See also `ring-bell-function'. */); | |
177c0ea7 | 6373 | |
29208e82 | 6374 | DEFVAR_BOOL ("no-redraw-on-reenter", no_redraw_on_reenter, |
025de85b | 6375 | doc: /* Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
6376 | A non-nil value is useful if the terminal can automatically preserve |
6377 | Emacs's frame display when you reenter Emacs. | |
6378 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 6379 | |
29208e82 | 6380 | DEFVAR_LISP ("initial-window-system", Vinitial_window_system, |
2246281f | 6381 | doc: /* Name of the window system that Emacs uses for the first frame. |
89baa1df EZ |
6382 | The value is a symbol: |
6383 | nil for a termcap frame (a character-only terminal), | |
6384 | 'x' for an Emacs frame that is really an X window, | |
6385 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6386 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6387 | 'pc' for a direct-write MS-DOS frame. | |
6388 | ||
6389 | Use of this variable as a boolean is deprecated. Instead, | |
6390 | use `display-graphic-p' or any of the other `display-*-p' | |
6391 | predicates which report frame's specific UI-related capabilities. */); | |
177c0ea7 | 6392 | |
70b8d0a4 SM |
6393 | DEFVAR_KBOARD ("window-system", Vwindow_system, |
6394 | doc: /* Name of window system through which the selected frame is displayed. | |
89baa1df EZ |
6395 | The value is a symbol: |
6396 | nil for a termcap frame (a character-only terminal), | |
6397 | 'x' for an Emacs frame that is really an X window, | |
6398 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6399 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6400 | 'pc' for a direct-write MS-DOS frame. | |
6401 | ||
6402 | Use of this variable as a boolean is deprecated. Instead, | |
6403 | use `display-graphic-p' or any of the other `display-*-p' | |
6404 | predicates which report frame's specific UI-related capabilities. */); | |
70b8d0a4 | 6405 | |
29208e82 | 6406 | DEFVAR_LISP ("window-system-version", Vwindow_system_version, |
bacf09b4 | 6407 | doc: /* The version number of the window system in use. |
c22140f6 | 6408 | For X windows, this is 11. */); |
177c0ea7 | 6409 | |
29208e82 | 6410 | DEFVAR_BOOL ("cursor-in-echo-area", cursor_in_echo_area, |
bacf09b4 | 6411 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 6412 | |
29208e82 | 6413 | DEFVAR_LISP ("glyph-table", Vglyph_table, |
bacf09b4 | 6414 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
6415 | If not nil, this is a vector indexed by glyph code to define the glyph. |
6416 | Each element can be: | |
6417 | integer: a glyph code which this glyph is an alias for. | |
6418 | string: output this glyph using that string (not impl. in X windows). | |
6419 | nil: this glyph mod 524288 is the code of a character to output, | |
6420 | and this glyph / 524288 is the face number (see `face-id') to use | |
6421 | while outputting it. */); | |
4588ec20 JB |
6422 | Vglyph_table = Qnil; |
6423 | ||
29208e82 | 6424 | DEFVAR_LISP ("standard-display-table", Vstandard_display_table, |
bacf09b4 | 6425 | doc: /* Display table to use for buffers that specify none. |
228299fa | 6426 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
6427 | Vstandard_display_table = Qnil; |
6428 | ||
29208e82 | 6429 | DEFVAR_BOOL ("redisplay-dont-pause", redisplay_dont_pause, |
025de85b | 6430 | doc: /* Non-nil means display update isn't paused when input is detected. */); |
6bf7006f | 6431 | redisplay_dont_pause = 1; |
5f5c8ee5 | 6432 | |
d012c62b | 6433 | #if PERIODIC_PREEMPTION_CHECKING |
29208e82 | 6434 | DEFVAR_LISP ("redisplay-preemption-period", Vredisplay_preemption_period, |
025de85b CY |
6435 | doc: /* Period in seconds between checking for input during redisplay. |
6436 | This has an effect only if `redisplay-dont-pause' is nil; in that | |
6437 | case, arriving input preempts redisplay until the input is processed. | |
6438 | If the value is nil, redisplay is never preempted. */); | |
d012c62b KS |
6439 | Vredisplay_preemption_period = make_float (0.10); |
6440 | #endif | |
6441 | ||
4588ec20 JB |
6442 | #ifdef CANNOT_DUMP |
6443 | if (noninteractive) | |
6444 | #endif | |
6445 | { | |
2246281f | 6446 | Vinitial_window_system = Qnil; |
4588ec20 JB |
6447 | Vwindow_system_version = Qnil; |
6448 | } | |
6449 | } |