Commit | Line | Data |
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4588ec20 | 1 | /* Updating of data structures for redisplay. |
9311dcff GM |
2 | |
3 | Copyright (C) 1985-1988, 1993-1995, 1997-2012 Free Software Foundation, Inc. | |
4588ec20 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
9ec0b715 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
4588ec20 | 8 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
4588ec20 JB |
11 | |
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
4588ec20 | 19 | |
18160b98 | 20 | #include <config.h> |
f162bcc3 PE |
21 | |
22 | #define DISPEXTERN_INLINE EXTERN_INLINE | |
23 | ||
565620a5 | 24 | #include <stdio.h> |
dfcf069d | 25 | #include <unistd.h> |
dfcf069d | 26 | |
47099d6f | 27 | #include "lisp.h" |
4588ec20 JB |
28 | #include "termchar.h" |
29 | #include "termopts.h" | |
a0879520 | 30 | /* cm.h must come after dispextern.h on Windows. */ |
fd2e066a GV |
31 | #include "dispextern.h" |
32 | #include "cm.h" | |
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 | ||
1c6f11f4 | 57 | #ifdef DISPNEW_NEEDS_STDIO_EXT |
68c45bf0 | 58 | #include <stdio_ext.h> |
4588ec20 | 59 | #endif |
c59592b3 | 60 | |
9311dcff | 61 | #if defined (HAVE_TERM_H) && defined (GNU_LINUX) |
fa0ec9f4 DL |
62 | #include <term.h> /* for tgetent */ |
63 | #endif | |
5f5c8ee5 GM |
64 | \f |
65 | /* Structure to pass dimensions around. Used for character bounding | |
66 | boxes, glyph matrix dimensions and alike. */ | |
67 | ||
68 | struct dim | |
69 | { | |
70 | int width; | |
71 | int height; | |
72 | }; | |
73 | ||
74 | \f | |
75 | /* Function prototypes. */ | |
76 | ||
f57e2426 | 77 | static void update_frame_line (struct frame *, int); |
2f7c71a1 AS |
78 | static int required_matrix_height (struct window *); |
79 | static int required_matrix_width (struct window *); | |
f57e2426 | 80 | static void adjust_frame_glyphs (struct frame *); |
59ea14cd | 81 | static void change_frame_size_1 (struct frame *, int, int, bool, bool, bool); |
d311d28c | 82 | static void increment_row_positions (struct glyph_row *, ptrdiff_t, ptrdiff_t); |
f57e2426 J |
83 | static void fill_up_frame_row_with_spaces (struct glyph_row *, int); |
84 | static void build_frame_matrix_from_window_tree (struct glyph_matrix *, | |
85 | struct window *); | |
86 | static void build_frame_matrix_from_leaf_window (struct glyph_matrix *, | |
87 | struct window *); | |
f57e2426 J |
88 | static void adjust_frame_message_buffer (struct frame *); |
89 | static void adjust_decode_mode_spec_buffer (struct frame *); | |
90 | static void fill_up_glyph_row_with_spaces (struct glyph_row *); | |
59ea14cd | 91 | static void clear_window_matrices (struct window *, bool); |
f57e2426 | 92 | static void fill_up_glyph_row_area_with_spaces (struct glyph_row *, int); |
59ea14cd PE |
93 | static int scrolling_window (struct window *, bool); |
94 | static bool update_window_line (struct window *, int, bool *); | |
f57e2426 | 95 | static void mirror_make_current (struct window *, int); |
e509cfa6 | 96 | #ifdef GLYPH_DEBUG |
f57e2426 J |
97 | static void check_matrix_pointers (struct glyph_matrix *, |
98 | struct glyph_matrix *); | |
b96fd3e8 | 99 | #endif |
f57e2426 | 100 | static void mirror_line_dance (struct window *, int, int, int *, char *); |
59ea14cd PE |
101 | static bool update_window_tree (struct window *, bool); |
102 | static bool update_window (struct window *, bool); | |
103 | static bool update_frame_1 (struct frame *, bool, bool); | |
104 | static bool scrolling (struct frame *); | |
f57e2426 | 105 | static void set_window_cursor_after_update (struct window *); |
f57e2426 J |
106 | static void adjust_frame_glyphs_for_window_redisplay (struct frame *); |
107 | static void adjust_frame_glyphs_for_frame_redisplay (struct frame *); | |
5f5c8ee5 | 108 | |
5f5c8ee5 | 109 | \f |
d012c62b KS |
110 | /* Redisplay preemption timers. */ |
111 | ||
112 | static EMACS_TIME preemption_period; | |
113 | static EMACS_TIME preemption_next_check; | |
114 | ||
59ea14cd | 115 | /* True upon entry to redisplay means do not assume anything about |
502b9b64 | 116 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 117 | |
59ea14cd | 118 | bool frame_garbaged; |
4588ec20 | 119 | |
59ea14cd | 120 | /* True means last display completed. False means it was preempted. */ |
4588ec20 | 121 | |
59ea14cd | 122 | bool display_completed; |
4588ec20 | 123 | |
e7067d00 | 124 | Lisp_Object Qdisplay_table, Qredisplay_dont_pause; |
5f5c8ee5 | 125 | |
4588ec20 | 126 | \f |
5f5c8ee5 | 127 | /* The currently selected frame. In a single-frame version, this |
91fb7e1b | 128 | variable always equals the_only_frame. */ |
4588ec20 | 129 | |
91fb7e1b | 130 | Lisp_Object selected_frame; |
4588ec20 | 131 | |
5f5c8ee5 | 132 | /* A frame which is not just a mini-buffer, or 0 if there are no such |
502b9b64 | 133 | frames. This is usually the most recent such frame that was |
87485d6f MW |
134 | selected. In a single-frame version, this variable always holds |
135 | the address of the_only_frame. */ | |
4588ec20 | 136 | |
5f5c8ee5 | 137 | struct frame *last_nonminibuf_frame; |
d52bad65 | 138 | |
59ea14cd | 139 | /* True means SIGWINCH happened when not safe. */ |
4588ec20 | 140 | |
59ea14cd | 141 | static bool delayed_size_change; |
4588ec20 | 142 | |
5f5c8ee5 | 143 | /* 1 means glyph initialization has been completed at startup. */ |
4588ec20 | 144 | |
59ea14cd | 145 | static bool glyphs_initialized_initially_p; |
4588ec20 | 146 | |
5f5c8ee5 | 147 | /* Updated window if != 0. Set by update_window. */ |
4588ec20 | 148 | |
5f5c8ee5 | 149 | struct window *updated_window; |
4588ec20 | 150 | |
5f5c8ee5 | 151 | /* Glyph row updated in update_window_line, and area that is updated. */ |
4588ec20 | 152 | |
5f5c8ee5 GM |
153 | struct glyph_row *updated_row; |
154 | int updated_area; | |
4588ec20 | 155 | |
5f5c8ee5 | 156 | /* A glyph for a space. */ |
4588ec20 | 157 | |
5f5c8ee5 | 158 | struct glyph space_glyph; |
4588ec20 | 159 | |
5f5c8ee5 GM |
160 | /* Counts of allocated structures. These counts serve to diagnose |
161 | memory leaks and double frees. */ | |
4588ec20 | 162 | |
5bf46f05 PE |
163 | static int glyph_matrix_count; |
164 | static int glyph_pool_count; | |
4588ec20 | 165 | |
5f5c8ee5 GM |
166 | /* If non-null, the frame whose frame matrices are manipulated. If |
167 | null, window matrices are worked on. */ | |
4588ec20 | 168 | |
5f5c8ee5 | 169 | static struct frame *frame_matrix_frame; |
4588ec20 | 170 | |
59ea14cd | 171 | /* True means that fonts have been loaded since the last glyph |
5f5c8ee5 | 172 | matrix adjustments. Redisplay must stop, and glyph matrices must |
59ea14cd | 173 | be adjusted when this flag becomes true during display. The |
5f5c8ee5 | 174 | reason fonts can be loaded so late is that fonts of fontsets are |
3aa9f0c4 KH |
175 | loaded on demand. Another reason is that a line contains many |
176 | characters displayed by zero width or very narrow glyphs of | |
177 | variable-width fonts. */ | |
836d2cde | 178 | |
59ea14cd | 179 | bool fonts_changed_p; |
836d2cde | 180 | |
177c0ea7 | 181 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 182 | This may only be used for terminal frames. */ |
836d2cde | 183 | |
e509cfa6 | 184 | #ifdef GLYPH_DEBUG |
4588ec20 | 185 | |
f57e2426 J |
186 | static int window_to_frame_vpos (struct window *, int); |
187 | static int window_to_frame_hpos (struct window *, int); | |
5f5c8ee5 GM |
188 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) |
189 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 190 | |
9b0e97aa GM |
191 | /* One element of the ring buffer containing redisplay history |
192 | information. */ | |
193 | ||
194 | struct redisplay_history | |
195 | { | |
196 | char trace[512 + 100]; | |
197 | }; | |
198 | ||
199 | /* The size of the history buffer. */ | |
200 | ||
201 | #define REDISPLAY_HISTORY_SIZE 30 | |
202 | ||
203 | /* The redisplay history buffer. */ | |
204 | ||
205 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
206 | ||
207 | /* Next free entry in redisplay_history. */ | |
208 | ||
209 | static int history_idx; | |
210 | ||
211 | /* A tick that's incremented each time something is added to the | |
212 | history. */ | |
213 | ||
dfd153ae | 214 | static uprintmax_t history_tick; |
6a8aec41 | 215 | \f |
9b0e97aa GM |
216 | /* Add to the redisplay history how window W has been displayed. |
217 | MSG is a trace containing the information how W's glyph matrix | |
59ea14cd | 218 | has been constructed. PAUSED_P means that the update |
9b0e97aa GM |
219 | has been interrupted for pending input. */ |
220 | ||
221 | static void | |
59ea14cd | 222 | add_window_display_history (struct window *w, const char *msg, bool paused_p) |
9b0e97aa GM |
223 | { |
224 | char *buf; | |
177c0ea7 | 225 | |
9b0e97aa GM |
226 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
227 | history_idx = 0; | |
228 | buf = redisplay_history[history_idx].trace; | |
229 | ++history_idx; | |
177c0ea7 | 230 | |
8666506e PE |
231 | snprintf (buf, sizeof redisplay_history[0].trace, |
232 | "%"pMu": window %p (`%s')%s\n%s", | |
233 | history_tick++, | |
234 | w, | |
d3d50620 DA |
235 | ((BUFFERP (w->buffer) |
236 | && STRINGP (BVAR (XBUFFER (w->buffer), name))) | |
237 | ? SSDATA (BVAR (XBUFFER (w->buffer), name)) | |
8666506e PE |
238 | : "???"), |
239 | paused_p ? " ***paused***" : "", | |
240 | msg); | |
9b0e97aa GM |
241 | } |
242 | ||
243 | ||
244 | /* Add to the redisplay history that frame F has been displayed. | |
59ea14cd | 245 | PAUSED_P means that the update has been interrupted for |
9b0e97aa GM |
246 | pending input. */ |
247 | ||
248 | static void | |
59ea14cd | 249 | add_frame_display_history (struct frame *f, bool paused_p) |
9b0e97aa GM |
250 | { |
251 | char *buf; | |
177c0ea7 | 252 | |
9b0e97aa GM |
253 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
254 | history_idx = 0; | |
255 | buf = redisplay_history[history_idx].trace; | |
256 | ++history_idx; | |
177c0ea7 | 257 | |
dfd153ae | 258 | sprintf (buf, "%"pMu": update frame %p%s", |
9b0e97aa GM |
259 | history_tick++, |
260 | f, paused_p ? " ***paused***" : ""); | |
261 | } | |
262 | ||
263 | ||
a7ca3326 | 264 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, |
9b0e97aa | 265 | Sdump_redisplay_history, 0, 0, "", |
7ee72033 | 266 | doc: /* Dump redisplay history to stderr. */) |
5842a27b | 267 | (void) |
9b0e97aa GM |
268 | { |
269 | int i; | |
270 | ||
271 | for (i = history_idx - 1; i != history_idx; --i) | |
272 | { | |
273 | if (i < 0) | |
274 | i = REDISPLAY_HISTORY_SIZE - 1; | |
275 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
276 | } | |
277 | ||
278 | return Qnil; | |
279 | } | |
280 | ||
281 | ||
e509cfa6 | 282 | #else /* not GLYPH_DEBUG */ |
4588ec20 | 283 | |
7df02016 KS |
284 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
285 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 286 | |
e509cfa6 | 287 | #endif /* GLYPH_DEBUG */ |
4588ec20 | 288 | |
4588ec20 | 289 | |
9e4bf381 PE |
290 | #if (defined PROFILING \ |
291 | && (defined __FreeBSD__ || defined GNU_LINUX || defined __MINGW32__) \ | |
292 | && !HAVE___EXECUTABLE_START) | |
293 | /* This function comes first in the Emacs executable and is used only | |
294 | to estimate the text start for profiling. */ | |
4588ec20 | 295 | void |
9e4bf381 | 296 | __executable_start (void) |
4588ec20 | 297 | { |
1088b922 | 298 | emacs_abort (); |
177c0ea7 | 299 | } |
72af86bd | 300 | #endif |
5f5c8ee5 GM |
301 | \f |
302 | /*********************************************************************** | |
303 | Glyph Matrices | |
304 | ***********************************************************************/ | |
305 | ||
306 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
307 | pool from which memory for the matrix should be allocated, or null | |
308 | for window-based redisplay where no glyph pools are used. The | |
309 | member `pool' of the glyph matrix structure returned is set to | |
310 | POOL, the structure is otherwise zeroed. */ | |
311 | ||
5bf46f05 | 312 | static struct glyph_matrix * |
971de7fb | 313 | new_glyph_matrix (struct glyph_pool *pool) |
4588ec20 | 314 | { |
23f86fce | 315 | struct glyph_matrix *result = xzalloc (sizeof *result); |
4588ec20 | 316 | |
5f5c8ee5 GM |
317 | /* Increment number of allocated matrices. This count is used |
318 | to detect memory leaks. */ | |
319 | ++glyph_matrix_count; | |
4588ec20 | 320 | |
5f5c8ee5 GM |
321 | /* Set pool and return. */ |
322 | result->pool = pool; | |
323 | return result; | |
4588ec20 JB |
324 | } |
325 | ||
4588ec20 | 326 | |
5f5c8ee5 GM |
327 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
328 | ||
329 | The global counter glyph_matrix_count is decremented when a matrix | |
330 | is freed. If the count gets negative, more structures were freed | |
331 | than allocated, i.e. one matrix was freed more than once or a bogus | |
332 | pointer was passed to this function. | |
177c0ea7 | 333 | |
5f5c8ee5 GM |
334 | If MATRIX->pool is null, this means that the matrix manages its own |
335 | glyph memory---this is done for matrices on X frames. Freeing the | |
336 | matrix also frees the glyph memory in this case. */ | |
337 | ||
338 | static void | |
971de7fb | 339 | free_glyph_matrix (struct glyph_matrix *matrix) |
4588ec20 | 340 | { |
5f5c8ee5 GM |
341 | if (matrix) |
342 | { | |
343 | int i; | |
344 | ||
345 | /* Detect the case that more matrices are freed than were | |
346 | allocated. */ | |
347 | if (--glyph_matrix_count < 0) | |
1088b922 | 348 | emacs_abort (); |
5f5c8ee5 GM |
349 | |
350 | /* Free glyph memory if MATRIX owns it. */ | |
351 | if (matrix->pool == NULL) | |
352 | for (i = 0; i < matrix->rows_allocated; ++i) | |
353 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 354 | |
5f5c8ee5 GM |
355 | /* Free row structures and the matrix itself. */ |
356 | xfree (matrix->rows); | |
357 | xfree (matrix); | |
358 | } | |
359 | } | |
4588ec20 | 360 | |
4588ec20 | 361 | |
5f5c8ee5 GM |
362 | /* Return the number of glyphs to reserve for a marginal area of |
363 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
364 | display line of window W. MARGIN gives the width of the marginal | |
365 | area in canonical character units. MARGIN should be an integer | |
366 | or a float. */ | |
367 | ||
368 | static int | |
971de7fb | 369 | margin_glyphs_to_reserve (struct window *w, int total_glyphs, Lisp_Object margin) |
5f5c8ee5 GM |
370 | { |
371 | int n; | |
4588ec20 | 372 | |
5f5c8ee5 | 373 | if (NUMBERP (margin)) |
4588ec20 | 374 | { |
d3d50620 | 375 | int width = XFASTINT (w->total_cols); |
5f5c8ee5 GM |
376 | double d = max (0, XFLOATINT (margin)); |
377 | d = min (width / 2 - 1, d); | |
35ec832e | 378 | n = (int) ((double) total_glyphs / width * d); |
5f5c8ee5 GM |
379 | } |
380 | else | |
381 | n = 0; | |
382 | ||
383 | return n; | |
384 | } | |
385 | ||
59ea14cd | 386 | /* Return true if ROW's hash value is correct. |
e509cfa6 DA |
387 | Optimized away if ENABLE_CHECKING is not defined. */ |
388 | ||
59ea14cd | 389 | static bool |
7a7270dd EZ |
390 | verify_row_hash (struct glyph_row *row) |
391 | { | |
015137db | 392 | return row->hash == row_hash (row); |
7a7270dd | 393 | } |
4588ec20 | 394 | |
5f5c8ee5 GM |
395 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
396 | window sizes. | |
4588ec20 | 397 | |
5f5c8ee5 GM |
398 | W is null if the function is called for a frame glyph matrix. |
399 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
400 | indices of the first column and row of MATRIX within the frame | |
401 | matrix, if such a matrix exists. They are zero for purely | |
402 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 403 | |
5f5c8ee5 GM |
404 | In window-based redisplay, where no frame matrices exist, glyph |
405 | matrices manage their own glyph storage. Otherwise, they allocate | |
406 | storage from a common frame glyph pool which can be found in | |
407 | MATRIX->pool. | |
23b0200c | 408 | |
5f5c8ee5 GM |
409 | The reason for this memory management strategy is to avoid complete |
410 | frame redraws if possible. When we allocate from a common pool, a | |
411 | change of the location or size of a sub-matrix within the pool | |
412 | requires a complete redisplay of the frame because we cannot easily | |
413 | make sure that the current matrices of all windows still agree with | |
414 | what is displayed on the screen. While this is usually fast, it | |
415 | leads to screen flickering. */ | |
23b0200c | 416 | |
5f5c8ee5 | 417 | static void |
971de7fb | 418 | adjust_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int x, int y, struct dim dim) |
5f5c8ee5 GM |
419 | { |
420 | int i; | |
421 | int new_rows; | |
59ea14cd PE |
422 | bool marginal_areas_changed_p = 0; |
423 | bool header_line_changed_p = 0; | |
424 | bool header_line_p = 0; | |
5f5c8ee5 | 425 | int left = -1, right = -1; |
ca8a12a7 | 426 | int window_width = -1, window_height = -1; |
5f5c8ee5 | 427 | |
6b61353c KH |
428 | /* See if W had a header line that has disappeared now, or vice versa. |
429 | Get W's size. */ | |
5f5c8ee5 GM |
430 | if (w) |
431 | { | |
6b61353c KH |
432 | window_box (w, -1, 0, 0, &window_width, &window_height); |
433 | ||
045dee35 GM |
434 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
435 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 436 | } |
045dee35 | 437 | matrix->header_line_p = header_line_p; |
23b0200c | 438 | |
6b61353c KH |
439 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
440 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
441 | haven't changed. This optimization is important because preserving |
442 | the matrix means preventing redisplay. */ | |
443 | if (matrix->pool == NULL) | |
444 | { | |
d3d50620 DA |
445 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
446 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
a54e2c05 | 447 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
448 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs |
449 | || right != matrix->right_margin_glyphs); | |
450 | ||
451 | if (!marginal_areas_changed_p | |
452 | && !fonts_changed_p | |
045dee35 | 453 | && !header_line_changed_p |
7df02016 KS |
454 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
455 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
456 | && matrix->window_height == window_height |
457 | && matrix->window_vscroll == w->vscroll | |
458 | && matrix->window_width == window_width) | |
459 | return; | |
460 | } | |
177c0ea7 | 461 | |
5f5c8ee5 GM |
462 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
463 | if (matrix->rows_allocated < dim.height) | |
464 | { | |
0065d054 | 465 | int old_alloc = matrix->rows_allocated; |
5f5c8ee5 | 466 | new_rows = dim.height - matrix->rows_allocated; |
0065d054 PE |
467 | matrix->rows = xpalloc (matrix->rows, &matrix->rows_allocated, |
468 | new_rows, INT_MAX, sizeof *matrix->rows); | |
469 | memset (matrix->rows + old_alloc, 0, | |
470 | (matrix->rows_allocated - old_alloc) * sizeof *matrix->rows); | |
5f5c8ee5 GM |
471 | } |
472 | else | |
473 | new_rows = 0; | |
60a8948a | 474 | |
5f5c8ee5 GM |
475 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
476 | on a frame not using window-based redisplay. Set up pointers for | |
477 | each row into the glyph pool. */ | |
478 | if (matrix->pool) | |
479 | { | |
a54e2c05 | 480 | eassert (matrix->pool->glyphs); |
177c0ea7 | 481 | |
5f5c8ee5 | 482 | if (w) |
60a8948a | 483 | { |
5f5c8ee5 | 484 | left = margin_glyphs_to_reserve (w, dim.width, |
d3d50620 | 485 | w->left_margin_cols); |
5f5c8ee5 | 486 | right = margin_glyphs_to_reserve (w, dim.width, |
d3d50620 | 487 | w->right_margin_cols); |
60a8948a | 488 | } |
5f5c8ee5 GM |
489 | else |
490 | left = right = 0; | |
177c0ea7 | 491 | |
5f5c8ee5 | 492 | for (i = 0; i < dim.height; ++i) |
60a8948a | 493 | { |
5f5c8ee5 | 494 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
495 | |
496 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
497 | = (matrix->pool->glyphs |
498 | + (y + i) * matrix->pool->ncolumns | |
499 | + x); | |
177c0ea7 | 500 | |
5f5c8ee5 GM |
501 | if (w == NULL |
502 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 503 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
504 | { |
505 | row->glyphs[TEXT_AREA] | |
506 | = row->glyphs[LEFT_MARGIN_AREA]; | |
507 | row->glyphs[RIGHT_MARGIN_AREA] | |
508 | = row->glyphs[TEXT_AREA] + dim.width; | |
509 | row->glyphs[LAST_AREA] | |
510 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
511 | } | |
512 | else | |
513 | { | |
514 | row->glyphs[TEXT_AREA] | |
515 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
516 | row->glyphs[RIGHT_MARGIN_AREA] | |
517 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
518 | row->glyphs[LAST_AREA] | |
519 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
520 | } | |
60a8948a | 521 | } |
177c0ea7 | 522 | |
5f5c8ee5 GM |
523 | matrix->left_margin_glyphs = left; |
524 | matrix->right_margin_glyphs = right; | |
525 | } | |
526 | else | |
527 | { | |
528 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
6b61353c KH |
529 | its own memory. It is a window matrix for window-based redisplay. |
530 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
531 | if (dim.width > matrix->matrix_w |
532 | || new_rows | |
045dee35 | 533 | || header_line_changed_p |
5f5c8ee5 | 534 | || marginal_areas_changed_p) |
4588ec20 | 535 | { |
5f5c8ee5 GM |
536 | struct glyph_row *row = matrix->rows; |
537 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 538 | |
5f5c8ee5 GM |
539 | while (row < end) |
540 | { | |
541 | row->glyphs[LEFT_MARGIN_AREA] | |
0065d054 PE |
542 | = xnrealloc (row->glyphs[LEFT_MARGIN_AREA], |
543 | dim.width, sizeof (struct glyph)); | |
177c0ea7 | 544 | |
5f5c8ee5 GM |
545 | /* The mode line never has marginal areas. */ |
546 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 547 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
548 | { |
549 | row->glyphs[TEXT_AREA] | |
550 | = row->glyphs[LEFT_MARGIN_AREA]; | |
551 | row->glyphs[RIGHT_MARGIN_AREA] | |
552 | = row->glyphs[TEXT_AREA] + dim.width; | |
553 | row->glyphs[LAST_AREA] | |
554 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
555 | } | |
556 | else | |
557 | { | |
558 | row->glyphs[TEXT_AREA] | |
559 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
560 | row->glyphs[RIGHT_MARGIN_AREA] | |
561 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
562 | row->glyphs[LAST_AREA] | |
563 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
564 | } | |
565 | ++row; | |
566 | } | |
4588ec20 JB |
567 | } |
568 | ||
a54e2c05 | 569 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
570 | matrix->left_margin_glyphs = left; |
571 | matrix->right_margin_glyphs = right; | |
572 | } | |
177c0ea7 | 573 | |
5f5c8ee5 GM |
574 | /* Number of rows to be used by MATRIX. */ |
575 | matrix->nrows = dim.height; | |
a54e2c05 | 576 | eassert (matrix->nrows >= 0); |
5f5c8ee5 | 577 | |
b7b20fbd | 578 | if (w) |
5f5c8ee5 | 579 | { |
b7b20fbd | 580 | if (matrix == w->current_matrix) |
4588ec20 | 581 | { |
b7b20fbd GM |
582 | /* Mark rows in a current matrix of a window as not having |
583 | valid contents. It's important to not do this for | |
584 | desired matrices. When Emacs starts, it may already be | |
585 | building desired matrices when this function runs. */ | |
586 | if (window_width < 0) | |
587 | window_width = window_box_width (w, -1); | |
177c0ea7 | 588 | |
b7b20fbd GM |
589 | /* Optimize the case that only the height has changed (C-x 2, |
590 | upper window). Invalidate all rows that are no longer part | |
591 | of the window. */ | |
592 | if (!marginal_areas_changed_p | |
73d75a62 GM |
593 | && !header_line_changed_p |
594 | && new_rows == 0 | |
595 | && dim.width == matrix->matrix_w | |
7df02016 KS |
596 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
597 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 598 | && matrix->window_width == window_width) |
b7b20fbd | 599 | { |
dd42b31a GM |
600 | /* Find the last row in the window. */ |
601 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
602 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
603 | { | |
26447967 | 604 | ++i; |
dd42b31a GM |
605 | break; |
606 | } | |
b7b20fbd GM |
607 | |
608 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 609 | are invalidated below. */ |
d3d50620 DA |
610 | if (INTEGERP (w->window_end_vpos) |
611 | && XFASTINT (w->window_end_vpos) >= i) | |
e8c17b81 | 612 | wset_window_end_valid (w, Qnil); |
177c0ea7 | 613 | |
b7b20fbd GM |
614 | while (i < matrix->nrows) |
615 | matrix->rows[i++].enabled_p = 0; | |
616 | } | |
617 | else | |
618 | { | |
619 | for (i = 0; i < matrix->nrows; ++i) | |
620 | matrix->rows[i].enabled_p = 0; | |
621 | } | |
5f5c8ee5 | 622 | } |
b7b20fbd | 623 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 624 | { |
b7b20fbd GM |
625 | /* Rows in desired matrices always have to be cleared; |
626 | redisplay expects this is the case when it runs, so it | |
627 | had better be the case when we adjust matrices between | |
628 | redisplays. */ | |
5f5c8ee5 GM |
629 | for (i = 0; i < matrix->nrows; ++i) |
630 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 631 | } |
4588ec20 | 632 | } |
177c0ea7 JB |
633 | |
634 | ||
5f5c8ee5 GM |
635 | /* Remember last values to be able to optimize frame redraws. */ |
636 | matrix->matrix_x = x; | |
637 | matrix->matrix_y = y; | |
638 | matrix->matrix_w = dim.width; | |
639 | matrix->matrix_h = dim.height; | |
640 | ||
641 | /* Record the top y location and height of W at the time the matrix | |
642 | was last adjusted. This is used to optimize redisplay above. */ | |
643 | if (w) | |
4588ec20 | 644 | { |
7df02016 KS |
645 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
646 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
647 | matrix->window_height = window_height; |
648 | matrix->window_width = window_width; | |
649 | matrix->window_vscroll = w->vscroll; | |
650 | } | |
651 | } | |
4588ec20 | 652 | |
4588ec20 | 653 | |
5f5c8ee5 GM |
654 | /* Reverse the contents of rows in MATRIX between START and END. The |
655 | contents of the row at END - 1 end up at START, END - 2 at START + | |
656 | 1 etc. This is part of the implementation of rotate_matrix (see | |
657 | below). */ | |
d52bad65 | 658 | |
5f5c8ee5 | 659 | static void |
971de7fb | 660 | reverse_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 GM |
661 | { |
662 | int i, j; | |
23b0200c | 663 | |
5f5c8ee5 GM |
664 | for (i = start, j = end - 1; i < j; ++i, --j) |
665 | { | |
666 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
667 | initialization. */ | |
668 | struct glyph_row temp; | |
669 | temp = matrix->rows[i]; | |
670 | matrix->rows[i] = matrix->rows[j]; | |
671 | matrix->rows[j] = temp; | |
672 | } | |
673 | } | |
23b0200c | 674 | |
23b0200c | 675 | |
5f5c8ee5 GM |
676 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
677 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
678 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
679 | row structures are moved around). | |
60a8948a | 680 | |
5f5c8ee5 GM |
681 | The algorithm used for rotating the vector was, I believe, first |
682 | described by Kernighan. See the vector R as consisting of two | |
683 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
684 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
685 | and reverse the result to get (ArBr)r which is BA. Similar for | |
686 | rotating right. */ | |
687 | ||
688 | void | |
971de7fb | 689 | rotate_matrix (struct glyph_matrix *matrix, int first, int last, int by) |
5f5c8ee5 GM |
690 | { |
691 | if (by < 0) | |
692 | { | |
693 | /* Up (rotate left, i.e. towards lower indices). */ | |
694 | by = -by; | |
695 | reverse_rows (matrix, first, first + by); | |
696 | reverse_rows (matrix, first + by, last); | |
697 | reverse_rows (matrix, first, last); | |
698 | } | |
699 | else if (by > 0) | |
700 | { | |
701 | /* Down (rotate right, i.e. towards higher indices). */ | |
702 | reverse_rows (matrix, last - by, last); | |
703 | reverse_rows (matrix, first, last - by); | |
704 | reverse_rows (matrix, first, last); | |
705 | } | |
706 | } | |
707 | ||
708 | ||
709 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
710 | with indices START <= index < END. Increment positions by DELTA/ | |
711 | DELTA_BYTES. */ | |
712 | ||
713 | void | |
ace1712c | 714 | increment_matrix_positions (struct glyph_matrix *matrix, int start, int end, |
d311d28c | 715 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
716 | { |
717 | /* Check that START and END are reasonable values. */ | |
a54e2c05 DA |
718 | eassert (start >= 0 && start <= matrix->nrows); |
719 | eassert (end >= 0 && end <= matrix->nrows); | |
720 | eassert (start <= end); | |
5f5c8ee5 GM |
721 | |
722 | for (; start < end; ++start) | |
86c11ba1 | 723 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
724 | } |
725 | ||
726 | ||
59ea14cd PE |
727 | /* Clear the enable_p flags in a range of rows in glyph matrix MATRIX. |
728 | START and END are the row indices of the first and last + 1 row to clear. */ | |
5f5c8ee5 GM |
729 | |
730 | void | |
59ea14cd | 731 | clear_glyph_matrix_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 | 732 | { |
a54e2c05 DA |
733 | eassert (start <= end); |
734 | eassert (start >= 0 && start < matrix->nrows); | |
735 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 736 | |
5f5c8ee5 | 737 | for (; start < end; ++start) |
59ea14cd | 738 | matrix->rows[start].enabled_p = 0; |
5f5c8ee5 GM |
739 | } |
740 | ||
741 | ||
742 | /* Clear MATRIX. | |
743 | ||
59ea14cd PE |
744 | Empty all rows in MATRIX by clearing their enabled_p flags. |
745 | The function prepare_desired_row will eventually really clear a row | |
746 | when it sees one with a false enabled_p flag. | |
5f5c8ee5 | 747 | |
59ea14cd | 748 | Reset update hints to default values. The only update hint |
5f5c8ee5 GM |
749 | currently present is the flag MATRIX->no_scrolling_p. */ |
750 | ||
751 | void | |
971de7fb | 752 | clear_glyph_matrix (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
753 | { |
754 | if (matrix) | |
755 | { | |
59ea14cd | 756 | clear_glyph_matrix_rows (matrix, 0, matrix->nrows); |
5f5c8ee5 GM |
757 | matrix->no_scrolling_p = 0; |
758 | } | |
759 | } | |
177c0ea7 | 760 | |
5f5c8ee5 GM |
761 | |
762 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
763 | Increment y-positions in glyph rows between START and END by DY, | |
764 | and recompute their visible height. */ | |
765 | ||
766 | void | |
971de7fb | 767 | shift_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int start, int end, int dy) |
5f5c8ee5 GM |
768 | { |
769 | int min_y, max_y; | |
177c0ea7 | 770 | |
a54e2c05 DA |
771 | eassert (start <= end); |
772 | eassert (start >= 0 && start < matrix->nrows); | |
773 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 774 | |
7df02016 KS |
775 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
776 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 777 | |
5f5c8ee5 GM |
778 | for (; start < end; ++start) |
779 | { | |
780 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 781 | |
5f5c8ee5 | 782 | row->y += dy; |
d6c747a4 | 783 | row->visible_height = row->height; |
177c0ea7 | 784 | |
5f5c8ee5 | 785 | if (row->y < min_y) |
d6c747a4 GM |
786 | row->visible_height -= min_y - row->y; |
787 | if (row->y + row->height > max_y) | |
788 | row->visible_height -= row->y + row->height - max_y; | |
e61124cd YM |
789 | if (row->fringe_bitmap_periodic_p) |
790 | row->redraw_fringe_bitmaps_p = 1; | |
5f5c8ee5 GM |
791 | } |
792 | } | |
793 | ||
794 | ||
795 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
796 | invalid is done by setting enabled_p to zero for all rows in a | |
797 | current matrix. */ | |
798 | ||
799 | void | |
971de7fb | 800 | clear_current_matrices (register struct frame *f) |
5f5c8ee5 GM |
801 | { |
802 | /* Clear frame current matrix, if we have one. */ | |
803 | if (f->current_matrix) | |
804 | clear_glyph_matrix (f->current_matrix); | |
805 | ||
806 | /* Clear the matrix of the menu bar window, if such a window exists. | |
807 | The menu bar window is currently used to display menus on X when | |
808 | no toolkit support is compiled in. */ | |
e69b0960 DA |
809 | if (WINDOWP (f->menu_bar_window)) |
810 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
5f5c8ee5 | 811 | |
9ea173e8 | 812 | /* Clear the matrix of the tool-bar window, if any. */ |
e69b0960 DA |
813 | if (WINDOWP (f->tool_bar_window)) |
814 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
5f5c8ee5 GM |
815 | |
816 | /* Clear current window matrices. */ | |
a54e2c05 | 817 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
818 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); |
819 | } | |
820 | ||
821 | ||
822 | /* Clear out all display lines of F for a coming redisplay. */ | |
823 | ||
824 | void | |
971de7fb | 825 | clear_desired_matrices (register struct frame *f) |
5f5c8ee5 GM |
826 | { |
827 | if (f->desired_matrix) | |
828 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 829 | |
e69b0960 DA |
830 | if (WINDOWP (f->menu_bar_window)) |
831 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
5f5c8ee5 | 832 | |
e69b0960 DA |
833 | if (WINDOWP (f->tool_bar_window)) |
834 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
5f5c8ee5 GM |
835 | |
836 | /* Do it for window matrices. */ | |
a54e2c05 | 837 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
838 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); |
839 | } | |
840 | ||
841 | ||
59ea14cd PE |
842 | /* Clear matrices in window tree rooted in W. If DESIRED_P, |
843 | clear desired matrices, otherwise clear current matrices. */ | |
5f5c8ee5 GM |
844 | |
845 | static void | |
59ea14cd | 846 | clear_window_matrices (struct window *w, bool desired_p) |
5f5c8ee5 GM |
847 | { |
848 | while (w) | |
849 | { | |
d3d50620 | 850 | if (!NILP (w->hchild)) |
5f5c8ee5 | 851 | { |
d3d50620 DA |
852 | eassert (WINDOWP (w->hchild)); |
853 | clear_window_matrices (XWINDOW (w->hchild), desired_p); | |
5f5c8ee5 | 854 | } |
d3d50620 | 855 | else if (!NILP (w->vchild)) |
5f5c8ee5 | 856 | { |
d3d50620 DA |
857 | eassert (WINDOWP (w->vchild)); |
858 | clear_window_matrices (XWINDOW (w->vchild), desired_p); | |
5f5c8ee5 GM |
859 | } |
860 | else | |
861 | { | |
862 | if (desired_p) | |
863 | clear_glyph_matrix (w->desired_matrix); | |
864 | else | |
865 | { | |
866 | clear_glyph_matrix (w->current_matrix); | |
e8c17b81 | 867 | wset_window_end_valid (w, Qnil); |
5f5c8ee5 GM |
868 | } |
869 | } | |
870 | ||
d3d50620 | 871 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
872 | } |
873 | } | |
874 | ||
875 | ||
876 | \f | |
877 | /*********************************************************************** | |
878 | Glyph Rows | |
879 | ||
880 | See dispextern.h for an overall explanation of glyph rows. | |
881 | ***********************************************************************/ | |
882 | ||
883 | /* Clear glyph row ROW. Do it in a way that makes it robust against | |
884 | changes in the glyph_row structure, i.e. addition or removal of | |
885 | structure members. */ | |
886 | ||
2cca872d KH |
887 | static struct glyph_row null_row; |
888 | ||
5f5c8ee5 | 889 | void |
971de7fb | 890 | clear_glyph_row (struct glyph_row *row) |
5f5c8ee5 GM |
891 | { |
892 | struct glyph *p[1 + LAST_AREA]; | |
5f5c8ee5 GM |
893 | |
894 | /* Save pointers. */ | |
895 | p[LEFT_MARGIN_AREA] = row->glyphs[LEFT_MARGIN_AREA]; | |
896 | p[TEXT_AREA] = row->glyphs[TEXT_AREA]; | |
897 | p[RIGHT_MARGIN_AREA] = row->glyphs[RIGHT_MARGIN_AREA]; | |
898 | p[LAST_AREA] = row->glyphs[LAST_AREA]; | |
899 | ||
900 | /* Clear. */ | |
901 | *row = null_row; | |
902 | ||
903 | /* Restore pointers. */ | |
904 | row->glyphs[LEFT_MARGIN_AREA] = p[LEFT_MARGIN_AREA]; | |
905 | row->glyphs[TEXT_AREA] = p[TEXT_AREA]; | |
906 | row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA]; | |
907 | row->glyphs[LAST_AREA] = p[LAST_AREA]; | |
45560b1a GM |
908 | |
909 | #if 0 /* At some point, some bit-fields of struct glyph were not set, | |
910 | which made glyphs unequal when compared with GLYPH_EQUAL_P. | |
911 | Redisplay outputs such glyphs, and flickering effects were | |
912 | the result. This also depended on the contents of memory | |
913 | returned by xmalloc. If flickering happens again, activate | |
153a073c | 914 | the code below. If the flickering is gone with that, chances |
45560b1a | 915 | are that the flickering has the same reason as here. */ |
72af86bd | 916 | memset (p[0], 0, (char *) p[LAST_AREA] - (char *) p[0]); |
45560b1a | 917 | #endif |
5f5c8ee5 GM |
918 | } |
919 | ||
920 | ||
921 | /* Make ROW an empty, enabled row of canonical character height, | |
922 | in window W starting at y-position Y. */ | |
923 | ||
924 | void | |
971de7fb | 925 | blank_row (struct window *w, struct glyph_row *row, int y) |
5f5c8ee5 GM |
926 | { |
927 | int min_y, max_y; | |
177c0ea7 | 928 | |
7df02016 KS |
929 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
930 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 931 | |
5f5c8ee5 GM |
932 | clear_glyph_row (row); |
933 | row->y = y; | |
408f5064 | 934 | row->ascent = row->phys_ascent = 0; |
d3d50620 | 935 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 936 | row->visible_height = row->height; |
177c0ea7 | 937 | |
5f5c8ee5 | 938 | if (row->y < min_y) |
d6c747a4 GM |
939 | row->visible_height -= min_y - row->y; |
940 | if (row->y + row->height > max_y) | |
941 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
942 | |
943 | row->enabled_p = 1; | |
944 | } | |
945 | ||
946 | ||
947 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
948 | are the amounts by which to change positions. Note that the first | |
949 | glyph of the text area of a row can have a buffer position even if | |
950 | the used count of the text area is zero. Such rows display line | |
951 | ends. */ | |
952 | ||
5bf46f05 | 953 | static void |
ace1712c | 954 | increment_row_positions (struct glyph_row *row, |
d311d28c | 955 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
956 | { |
957 | int area, i; | |
958 | ||
959 | /* Increment start and end positions. */ | |
960 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
961 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
962 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
963 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
d36fe237 EZ |
964 | CHARPOS (row->start.pos) += delta; |
965 | BYTEPOS (row->start.pos) += delta_bytes; | |
966 | CHARPOS (row->end.pos) += delta; | |
967 | BYTEPOS (row->end.pos) += delta_bytes; | |
5f5c8ee5 | 968 | |
5cacdcfd KS |
969 | if (!row->enabled_p) |
970 | return; | |
971 | ||
5f5c8ee5 GM |
972 | /* Increment positions in glyphs. */ |
973 | for (area = 0; area < LAST_AREA; ++area) | |
974 | for (i = 0; i < row->used[area]; ++i) | |
975 | if (BUFFERP (row->glyphs[area][i].object) | |
976 | && row->glyphs[area][i].charpos > 0) | |
977 | row->glyphs[area][i].charpos += delta; | |
978 | ||
979 | /* Capture the case of rows displaying a line end. */ | |
980 | if (row->used[TEXT_AREA] == 0 | |
981 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
982 | row->glyphs[TEXT_AREA]->charpos += delta; | |
983 | } | |
984 | ||
985 | ||
9af3e742 | 986 | #if 0 |
5f5c8ee5 GM |
987 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
988 | contents, i.e. glyph structure contents are exchanged between A and | |
989 | B without changing glyph pointers in A and B. */ | |
990 | ||
991 | static void | |
1dae0f0a | 992 | swap_glyphs_in_rows (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
993 | { |
994 | int area; | |
995 | ||
996 | for (area = 0; area < LAST_AREA; ++area) | |
997 | { | |
998 | /* Number of glyphs to swap. */ | |
999 | int max_used = max (a->used[area], b->used[area]); | |
1000 | ||
1001 | /* Start of glyphs in area of row A. */ | |
1002 | struct glyph *glyph_a = a->glyphs[area]; | |
1003 | ||
1004 | /* End + 1 of glyphs in area of row A. */ | |
1005 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
1006 | ||
1007 | /* Start of glyphs in area of row B. */ | |
1008 | struct glyph *glyph_b = b->glyphs[area]; | |
1009 | ||
1010 | while (glyph_a < glyph_a_end) | |
1011 | { | |
1012 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
1013 | initialization. */ | |
1014 | struct glyph temp; | |
1015 | temp = *glyph_a; | |
1016 | *glyph_a = *glyph_b; | |
1017 | *glyph_b = temp; | |
1018 | ++glyph_a; | |
1019 | ++glyph_b; | |
1020 | } | |
1021 | } | |
1022 | } | |
1023 | ||
9af3e742 | 1024 | #endif /* 0 */ |
5f5c8ee5 | 1025 | |
015137db EZ |
1026 | /* Exchange pointers to glyph memory between glyph rows A and B. Also |
1027 | exchange the used[] array and the hash values of the rows, because | |
1028 | these should all go together for the row's hash value to be | |
1029 | correct. */ | |
5f5c8ee5 | 1030 | |
b0ab8123 | 1031 | static void |
971de7fb | 1032 | swap_glyph_pointers (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1033 | { |
1034 | int i; | |
015137db EZ |
1035 | unsigned hash_tem = a->hash; |
1036 | ||
5f5c8ee5 GM |
1037 | for (i = 0; i < LAST_AREA + 1; ++i) |
1038 | { | |
1039 | struct glyph *temp = a->glyphs[i]; | |
015137db | 1040 | |
5f5c8ee5 GM |
1041 | a->glyphs[i] = b->glyphs[i]; |
1042 | b->glyphs[i] = temp; | |
73055685 EZ |
1043 | if (i < LAST_AREA) |
1044 | { | |
1045 | short used_tem = a->used[i]; | |
1046 | ||
1047 | a->used[i] = b->used[i]; | |
1048 | b->used[i] = used_tem; | |
1049 | } | |
5f5c8ee5 | 1050 | } |
015137db EZ |
1051 | a->hash = b->hash; |
1052 | b->hash = hash_tem; | |
5f5c8ee5 GM |
1053 | } |
1054 | ||
1055 | ||
1056 | /* Copy glyph row structure FROM to glyph row structure TO, except | |
015137db EZ |
1057 | that glyph pointers, the `used' counts, and the hash values in the |
1058 | structures are left unchanged. */ | |
5f5c8ee5 | 1059 | |
b0ab8123 | 1060 | static void |
971de7fb | 1061 | copy_row_except_pointers (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1062 | { |
1063 | struct glyph *pointers[1 + LAST_AREA]; | |
73055685 | 1064 | short used[LAST_AREA]; |
015137db | 1065 | unsigned hashval; |
5f5c8ee5 GM |
1066 | |
1067 | /* Save glyph pointers of TO. */ | |
72af86bd | 1068 | memcpy (pointers, to->glyphs, sizeof to->glyphs); |
015137db EZ |
1069 | memcpy (used, to->used, sizeof to->used); |
1070 | hashval = to->hash; | |
5f5c8ee5 GM |
1071 | |
1072 | /* Do a structure assignment. */ | |
1073 | *to = *from; | |
1074 | ||
1075 | /* Restore original pointers of TO. */ | |
72af86bd | 1076 | memcpy (to->glyphs, pointers, sizeof to->glyphs); |
015137db EZ |
1077 | memcpy (to->used, used, sizeof to->used); |
1078 | to->hash = hashval; | |
5f5c8ee5 GM |
1079 | } |
1080 | ||
1081 | ||
5f5c8ee5 GM |
1082 | /* Assign glyph row FROM to glyph row TO. This works like a structure |
1083 | assignment TO = FROM, except that glyph pointers are not copied but | |
1084 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1085 | a memory leak. */ | |
1086 | ||
b0ab8123 | 1087 | static void |
971de7fb | 1088 | assign_row (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1089 | { |
1090 | swap_glyph_pointers (to, from); | |
1091 | copy_row_except_pointers (to, from); | |
1092 | } | |
1093 | ||
1094 | ||
1095 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1096 | a row in a window matrix, is a slice of the glyph memory of the | |
1097 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
59ea14cd | 1098 | is true if the glyph memory of WINDOW_ROW is part of the glyph |
5f5c8ee5 GM |
1099 | memory of FRAME_ROW. */ |
1100 | ||
e509cfa6 | 1101 | #ifdef GLYPH_DEBUG |
9339e87f | 1102 | |
59ea14cd | 1103 | static bool |
59fc5cf9 | 1104 | glyph_row_slice_p (struct glyph_row *window_row, struct glyph_row *frame_row) |
5f5c8ee5 GM |
1105 | { |
1106 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1107 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1108 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1109 | ||
1110 | return (frame_glyph_start <= window_glyph_start | |
1111 | && window_glyph_start < frame_glyph_end); | |
1112 | } | |
1113 | ||
9339e87f | 1114 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1115 | |
9af3e742 GM |
1116 | #if 0 |
1117 | ||
5f5c8ee5 GM |
1118 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1119 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1120 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1121 | ||
1122 | static struct glyph_row * | |
59fc5cf9 AS |
1123 | find_glyph_row_slice (struct glyph_matrix *window_matrix, |
1124 | struct glyph_matrix *frame_matrix, int row) | |
5f5c8ee5 GM |
1125 | { |
1126 | int i; | |
1127 | ||
a54e2c05 | 1128 | eassert (row >= 0 && row < frame_matrix->nrows); |
5f5c8ee5 GM |
1129 | |
1130 | for (i = 0; i < window_matrix->nrows; ++i) | |
1131 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1132 | frame_matrix->rows + row)) | |
1133 | break; | |
1134 | ||
1135 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1136 | } | |
1137 | ||
9af3e742 | 1138 | #endif /* 0 */ |
5f5c8ee5 GM |
1139 | |
1140 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1141 | i.e. they are only marked as to be cleared by setting their | |
1142 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1143 | call to this function really clears it. */ | |
1144 | ||
1145 | void | |
971de7fb | 1146 | prepare_desired_row (struct glyph_row *row) |
5f5c8ee5 GM |
1147 | { |
1148 | if (!row->enabled_p) | |
1149 | { | |
59ea14cd | 1150 | bool rp = row->reversed_p; |
5009f85e | 1151 | |
5f5c8ee5 GM |
1152 | clear_glyph_row (row); |
1153 | row->enabled_p = 1; | |
5009f85e | 1154 | row->reversed_p = rp; |
5f5c8ee5 GM |
1155 | } |
1156 | } | |
1157 | ||
1158 | ||
1159 | /* Return a hash code for glyph row ROW. */ | |
1160 | ||
2f7c71a1 | 1161 | static int |
971de7fb | 1162 | line_hash_code (struct glyph_row *row) |
5f5c8ee5 GM |
1163 | { |
1164 | int hash = 0; | |
177c0ea7 | 1165 | |
5f5c8ee5 GM |
1166 | if (row->enabled_p) |
1167 | { | |
4cecaab8 MB |
1168 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1169 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1170 | ||
1171 | while (glyph < end) | |
1172 | { | |
1173 | int c = glyph->u.ch; | |
1174 | int face_id = glyph->face_id; | |
daf01701 | 1175 | if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
4cecaab8 MB |
1176 | c -= SPACEGLYPH; |
1177 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1178 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1179 | ++glyph; | |
1180 | } | |
5f5c8ee5 | 1181 | |
4cecaab8 MB |
1182 | if (hash == 0) |
1183 | hash = 1; | |
5f5c8ee5 GM |
1184 | } |
1185 | ||
1186 | return hash; | |
1187 | } | |
1188 | ||
1189 | ||
153a073c | 1190 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1191 | the number of characters in the line. If must_write_spaces is |
1192 | zero, leading and trailing spaces are ignored. */ | |
1193 | ||
dfd153ae | 1194 | static int |
971de7fb | 1195 | line_draw_cost (struct glyph_matrix *matrix, int vpos) |
5f5c8ee5 GM |
1196 | { |
1197 | struct glyph_row *row = matrix->rows + vpos; | |
1198 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1199 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1200 | int len; | |
1201 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
ca9ce8f2 | 1202 | ptrdiff_t glyph_table_len = GLYPH_TABLE_LENGTH; |
5f5c8ee5 GM |
1203 | |
1204 | /* Ignore trailing and leading spaces if we can. */ | |
daf01701 | 1205 | if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
5f5c8ee5 GM |
1206 | { |
1207 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1208 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1209 | --end; |
1210 | ||
177c0ea7 | 1211 | /* All blank line. */ |
5f5c8ee5 GM |
1212 | if (end == beg) |
1213 | return 0; | |
1214 | ||
1215 | /* Skip over leading spaces. */ | |
1216 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1217 | ++beg; | |
1218 | } | |
1219 | ||
1220 | /* If we don't have a glyph-table, each glyph is one character, | |
1221 | so return the number of glyphs. */ | |
1222 | if (glyph_table_base == 0) | |
1223 | len = end - beg; | |
1224 | else | |
1225 | { | |
1226 | /* Otherwise, scan the glyphs and accumulate their total length | |
1227 | in LEN. */ | |
1228 | len = 0; | |
1229 | while (beg < end) | |
1230 | { | |
3fc809e2 | 1231 | GLYPH g; |
177c0ea7 | 1232 | |
3fc809e2 KS |
1233 | SET_GLYPH_FROM_CHAR_GLYPH (g, *beg); |
1234 | ||
565b39a8 | 1235 | if (GLYPH_INVALID_P (g) |
42186983 | 1236 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) |
5f5c8ee5 GM |
1237 | len += 1; |
1238 | else | |
1239 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1240 | |
5f5c8ee5 GM |
1241 | ++beg; |
1242 | } | |
1243 | } | |
177c0ea7 | 1244 | |
5f5c8ee5 GM |
1245 | return len; |
1246 | } | |
1247 | ||
1248 | ||
59ea14cd PE |
1249 | /* Return true if the glyph rows A and B have equal contents. |
1250 | MOUSE_FACE_P means compare the mouse_face_p flags of A and B, too. */ | |
5f5c8ee5 | 1251 | |
b0ab8123 | 1252 | static bool |
59ea14cd | 1253 | row_equal_p (struct glyph_row *a, struct glyph_row *b, bool mouse_face_p) |
5f5c8ee5 | 1254 | { |
a54e2c05 DA |
1255 | eassert (verify_row_hash (a)); |
1256 | eassert (verify_row_hash (b)); | |
7a7270dd | 1257 | |
5f5c8ee5 GM |
1258 | if (a == b) |
1259 | return 1; | |
1260 | else if (a->hash != b->hash) | |
1261 | return 0; | |
1262 | else | |
1263 | { | |
1264 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1265 | int area; | |
1266 | ||
e4e0bee9 GM |
1267 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1268 | return 0; | |
1269 | ||
5f5c8ee5 GM |
1270 | /* Compare glyphs. */ |
1271 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1272 | { | |
1273 | if (a->used[area] != b->used[area]) | |
1274 | return 0; | |
177c0ea7 | 1275 | |
5f5c8ee5 GM |
1276 | a_glyph = a->glyphs[area]; |
1277 | a_end = a_glyph + a->used[area]; | |
1278 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1279 | |
5f5c8ee5 GM |
1280 | while (a_glyph < a_end |
1281 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1282 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1283 | |
5f5c8ee5 GM |
1284 | if (a_glyph != a_end) |
1285 | return 0; | |
1286 | } | |
1287 | ||
6b61353c KH |
1288 | if (a->fill_line_p != b->fill_line_p |
1289 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1290 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
1291 | || a->left_fringe_face_id != b->left_fringe_face_id | |
e61124cd | 1292 | || a->left_fringe_offset != b->left_fringe_offset |
6b61353c KH |
1293 | || a->right_fringe_bitmap != b->right_fringe_bitmap |
1294 | || a->right_fringe_face_id != b->right_fringe_face_id | |
e61124cd YM |
1295 | || a->right_fringe_offset != b->right_fringe_offset |
1296 | || a->fringe_bitmap_periodic_p != b->fringe_bitmap_periodic_p | |
3d4a365f | 1297 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
6b61353c | 1298 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1299 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1300 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1301 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
918f4159 | 1302 | || a->reversed_p != b->reversed_p |
5f5c8ee5 GM |
1303 | /* Different partially visible characters on left margin. */ |
1304 | || a->x != b->x | |
1305 | /* Different height. */ | |
1306 | || a->ascent != b->ascent | |
408f5064 GM |
1307 | || a->phys_ascent != b->phys_ascent |
1308 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1309 | || a->visible_height != b->visible_height) |
1310 | return 0; | |
1311 | } | |
1312 | ||
1313 | return 1; | |
1314 | } | |
1315 | ||
1316 | ||
1317 | \f | |
1318 | /*********************************************************************** | |
1319 | Glyph Pool | |
1320 | ||
1321 | See dispextern.h for an overall explanation of glyph pools. | |
1322 | ***********************************************************************/ | |
1323 | ||
1324 | /* Allocate a glyph_pool structure. The structure returned is | |
1325 | initialized with zeros. The global variable glyph_pool_count is | |
1326 | incremented for each pool allocated. */ | |
1327 | ||
1328 | static struct glyph_pool * | |
971de7fb | 1329 | new_glyph_pool (void) |
5f5c8ee5 | 1330 | { |
23f86fce | 1331 | struct glyph_pool *result = xzalloc (sizeof *result); |
177c0ea7 | 1332 | |
5f5c8ee5 GM |
1333 | /* For memory leak and double deletion checking. */ |
1334 | ++glyph_pool_count; | |
177c0ea7 | 1335 | |
5f5c8ee5 GM |
1336 | return result; |
1337 | } | |
1338 | ||
1339 | ||
1340 | /* Free a glyph_pool structure POOL. The function may be called with | |
1341 | a null POOL pointer. The global variable glyph_pool_count is | |
1342 | decremented with every pool structure freed. If this count gets | |
1343 | negative, more structures were freed than allocated, i.e. one | |
1344 | structure must have been freed more than once or a bogus pointer | |
1345 | was passed to free_glyph_pool. */ | |
1346 | ||
1347 | static void | |
971de7fb | 1348 | free_glyph_pool (struct glyph_pool *pool) |
5f5c8ee5 GM |
1349 | { |
1350 | if (pool) | |
1351 | { | |
153a073c | 1352 | /* More freed than allocated? */ |
5f5c8ee5 | 1353 | --glyph_pool_count; |
a54e2c05 | 1354 | eassert (glyph_pool_count >= 0); |
5f5c8ee5 GM |
1355 | |
1356 | xfree (pool->glyphs); | |
1357 | xfree (pool); | |
1358 | } | |
1359 | } | |
1360 | ||
1361 | ||
1362 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1363 | columns we need. This function never shrinks a pool. The only | |
1364 | case in which this would make sense, would be when a frame's size | |
1365 | is changed from a large value to a smaller one. But, if someone | |
1366 | does it once, we can expect that he will do it again. | |
1367 | ||
59ea14cd | 1368 | Return true if the pool changed in a way which makes |
5f5c8ee5 GM |
1369 | re-adjusting window glyph matrices necessary. */ |
1370 | ||
59ea14cd | 1371 | static bool |
971de7fb | 1372 | realloc_glyph_pool (struct glyph_pool *pool, struct dim matrix_dim) |
5f5c8ee5 | 1373 | { |
ca9ce8f2 | 1374 | ptrdiff_t needed; |
59ea14cd | 1375 | bool changed_p; |
5f5c8ee5 GM |
1376 | |
1377 | changed_p = (pool->glyphs == 0 | |
1378 | || matrix_dim.height != pool->nrows | |
1379 | || matrix_dim.width != pool->ncolumns); | |
1380 | ||
1381 | /* Enlarge the glyph pool. */ | |
ca9ce8f2 | 1382 | needed = matrix_dim.width; |
0065d054 PE |
1383 | if (INT_MULTIPLY_OVERFLOW (needed, matrix_dim.height)) |
1384 | memory_full (SIZE_MAX); | |
ca9ce8f2 | 1385 | needed *= matrix_dim.height; |
5f5c8ee5 GM |
1386 | if (needed > pool->nglyphs) |
1387 | { | |
0065d054 PE |
1388 | ptrdiff_t old_nglyphs = pool->nglyphs; |
1389 | pool->glyphs = xpalloc (pool->glyphs, &pool->nglyphs, | |
1390 | needed - old_nglyphs, -1, sizeof *pool->glyphs); | |
1391 | memset (pool->glyphs + old_nglyphs, 0, | |
1392 | (pool->nglyphs - old_nglyphs) * sizeof *pool->glyphs); | |
5f5c8ee5 GM |
1393 | } |
1394 | ||
153a073c | 1395 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1396 | to do sanity checks, and (b) the number of columns determines |
1397 | where rows in the frame matrix start---this must be available to | |
1398 | determine pointers to rows of window sub-matrices. */ | |
1399 | pool->nrows = matrix_dim.height; | |
1400 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1401 | |
5f5c8ee5 GM |
1402 | return changed_p; |
1403 | } | |
1404 | ||
1405 | ||
1406 | \f | |
1407 | /*********************************************************************** | |
1408 | Debug Code | |
1409 | ***********************************************************************/ | |
1410 | ||
e509cfa6 | 1411 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 1412 | |
a13396c9 | 1413 | |
28d440ab KL |
1414 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1415 | XXX Maybe this should be changed to flush the current terminal instead of | |
1416 | stdout. | |
1417 | */ | |
a13396c9 | 1418 | |
85fece3e PE |
1419 | void flush_stdout (void) EXTERNALLY_VISIBLE; |
1420 | ||
a13396c9 | 1421 | void |
59fc5cf9 | 1422 | flush_stdout (void) |
a13396c9 GM |
1423 | { |
1424 | fflush (stdout); | |
1425 | } | |
1426 | ||
1427 | ||
5f5c8ee5 GM |
1428 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1429 | pointer has been lost, e.g. by using a structure assignment between | |
1430 | rows, at least one pointer must occur more than once in the rows of | |
1431 | MATRIX. */ | |
1432 | ||
1433 | void | |
59fc5cf9 | 1434 | check_matrix_pointer_lossage (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
1435 | { |
1436 | int i, j; | |
177c0ea7 | 1437 | |
5f5c8ee5 GM |
1438 | for (i = 0; i < matrix->nrows; ++i) |
1439 | for (j = 0; j < matrix->nrows; ++j) | |
a54e2c05 | 1440 | eassert (i == j |
5f5c8ee5 GM |
1441 | || (matrix->rows[i].glyphs[TEXT_AREA] |
1442 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1443 | } | |
1444 | ||
1445 | ||
1446 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1447 | ||
1448 | struct glyph_row * | |
59fc5cf9 | 1449 | matrix_row (struct glyph_matrix *matrix, int row) |
5f5c8ee5 | 1450 | { |
a54e2c05 DA |
1451 | eassert (matrix && matrix->rows); |
1452 | eassert (row >= 0 && row < matrix->nrows); | |
5f5c8ee5 GM |
1453 | |
1454 | /* That's really too slow for normal testing because this function | |
1455 | is called almost everywhere. Although---it's still astonishingly | |
1456 | fast, so it is valuable to have for debugging purposes. */ | |
1457 | #if 0 | |
1458 | check_matrix_pointer_lossage (matrix); | |
1459 | #endif | |
177c0ea7 | 1460 | |
5f5c8ee5 GM |
1461 | return matrix->rows + row; |
1462 | } | |
1463 | ||
1464 | ||
1465 | #if 0 /* This function makes invalid assumptions when text is | |
1466 | partially invisible. But it might come handy for debugging | |
1467 | nevertheless. */ | |
1468 | ||
1469 | /* Check invariants that must hold for an up to date current matrix of | |
1470 | window W. */ | |
1471 | ||
1472 | static void | |
59fc5cf9 | 1473 | check_matrix_invariants (struct window *w) |
5f5c8ee5 GM |
1474 | { |
1475 | struct glyph_matrix *matrix = w->current_matrix; | |
1476 | int yb = window_text_bottom_y (w); | |
1477 | struct glyph_row *row = matrix->rows; | |
1478 | struct glyph_row *last_text_row = NULL; | |
1479 | struct buffer *saved = current_buffer; | |
d3d50620 | 1480 | struct buffer *buffer = XBUFFER (w->buffer); |
5f5c8ee5 | 1481 | int c; |
177c0ea7 | 1482 | |
5f5c8ee5 GM |
1483 | /* This can sometimes happen for a fresh window. */ |
1484 | if (matrix->nrows < 2) | |
1485 | return; | |
1486 | ||
1487 | set_buffer_temp (buffer); | |
1488 | ||
1489 | /* Note: last row is always reserved for the mode line. */ | |
1490 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1491 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1492 | { | |
1493 | struct glyph_row *next = row + 1; | |
1494 | ||
1495 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1496 | last_text_row = row; | |
1497 | ||
1498 | /* Check that character and byte positions are in sync. */ | |
a54e2c05 | 1499 | eassert (MATRIX_ROW_START_BYTEPOS (row) |
5f5c8ee5 | 1500 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); |
a54e2c05 | 1501 | eassert (BYTEPOS (row->start.pos) |
d36fe237 | 1502 | == CHAR_TO_BYTE (CHARPOS (row->start.pos))); |
5f5c8ee5 GM |
1503 | |
1504 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1505 | have such a position temporarily in case of a minibuffer | |
1506 | displaying something like `[Sole completion]' at its end. */ | |
1507 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
d36fe237 | 1508 | { |
a54e2c05 | 1509 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
d36fe237 | 1510 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); |
a54e2c05 | 1511 | eassert (BYTEPOS (row->end.pos) |
d36fe237 EZ |
1512 | == CHAR_TO_BYTE (CHARPOS (row->end.pos))); |
1513 | } | |
5f5c8ee5 GM |
1514 | |
1515 | /* Check that end position of `row' is equal to start position | |
1516 | of next row. */ | |
1517 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1518 | { | |
a54e2c05 | 1519 | eassert (MATRIX_ROW_END_CHARPOS (row) |
5f5c8ee5 | 1520 | == MATRIX_ROW_START_CHARPOS (next)); |
a54e2c05 | 1521 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
5f5c8ee5 | 1522 | == MATRIX_ROW_START_BYTEPOS (next)); |
a54e2c05 DA |
1523 | eassert (CHARPOS (row->end.pos) == CHARPOS (next->start.pos)); |
1524 | eassert (BYTEPOS (row->end.pos) == BYTEPOS (next->start.pos)); | |
5f5c8ee5 GM |
1525 | } |
1526 | row = next; | |
1527 | } | |
1528 | ||
a54e2c05 DA |
1529 | eassert (w->current_matrix->nrows == w->desired_matrix->nrows); |
1530 | eassert (w->desired_matrix->rows != NULL); | |
5f5c8ee5 GM |
1531 | set_buffer_temp (saved); |
1532 | } | |
1533 | ||
1534 | #endif /* 0 */ | |
1535 | ||
e509cfa6 | 1536 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
1537 | |
1538 | ||
1539 | \f | |
1540 | /********************************************************************** | |
1541 | Allocating/ Adjusting Glyph Matrices | |
1542 | **********************************************************************/ | |
1543 | ||
1544 | /* Allocate glyph matrices over a window tree for a frame-based | |
1545 | redisplay | |
1546 | ||
1547 | X and Y are column/row within the frame glyph matrix where | |
1548 | sub-matrices for the window tree rooted at WINDOW must be | |
59ea14cd | 1549 | allocated. DIM_ONLY_P means that the caller of this |
8ce2650d YM |
1550 | function is only interested in the result matrix dimension, and |
1551 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1552 | |
1553 | The function returns the total width/height of the sub-matrices of | |
1554 | the window tree. If called on a frame root window, the computation | |
1555 | will take the mini-buffer window into account. | |
1556 | ||
1557 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1558 | ||
1559 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1560 | glyph matrices yet, and | |
1561 | ||
1562 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1563 | any window in the tree will be changed or have been changed (see | |
153a073c | 1564 | DIM_ONLY_P) |
5f5c8ee5 GM |
1565 | |
1566 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1567 | function. | |
1568 | ||
1569 | Windows are arranged into chains of windows on the same level | |
1570 | through the next fields of window structures. Such a level can be | |
1571 | either a sequence of horizontally adjacent windows from left to | |
1572 | right, or a sequence of vertically adjacent windows from top to | |
1573 | bottom. Each window in a horizontal sequence can be either a leaf | |
1574 | window or a vertical sequence; a window in a vertical sequence can | |
1575 | be either a leaf or a horizontal sequence. All windows in a | |
1576 | horizontal sequence have the same height, and all windows in a | |
1577 | vertical sequence have the same width. | |
1578 | ||
1579 | This function uses, for historical reasons, a more general | |
1580 | algorithm to determine glyph matrix dimensions that would be | |
1581 | necessary. | |
1582 | ||
1583 | The matrix height of a horizontal sequence is determined by the | |
1584 | maximum height of any matrix in the sequence. The matrix width of | |
1585 | a horizontal sequence is computed by adding up matrix widths of | |
1586 | windows in the sequence. | |
1587 | ||
1588 | |<------- result width ------->| | |
1589 | +---------+----------+---------+ --- | |
1590 | | | | | | | |
1591 | | | | | | |
1592 | +---------+ | | result height | |
1593 | | +---------+ | |
1594 | | | | | |
1595 | +----------+ --- | |
1596 | ||
1597 | The matrix width of a vertical sequence is the maximum matrix width | |
1598 | of any window in the sequence. Its height is computed by adding up | |
1599 | matrix heights of windows in the sequence. | |
1600 | ||
1601 | |<---- result width -->| | |
1602 | +---------+ --- | |
1603 | | | | | |
1604 | | | | | |
1605 | +---------+--+ | | |
1606 | | | | | |
1607 | | | result height | |
1608 | | | | |
1609 | +------------+---------+ | | |
1610 | | | | | |
1611 | | | | | |
1612 | +------------+---------+ --- */ | |
1613 | ||
1614 | /* Bit indicating that a new matrix will be allocated or has been | |
1615 | allocated. */ | |
1616 | ||
1617 | #define NEW_LEAF_MATRIX (1 << 0) | |
1618 | ||
1619 | /* Bit indicating that a matrix will or has changed its location or | |
1620 | size. */ | |
1621 | ||
1622 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1623 | ||
1624 | static struct dim | |
6f704c76 | 1625 | allocate_matrices_for_frame_redisplay (Lisp_Object window, int x, int y, |
59ea14cd | 1626 | bool dim_only_p, int *window_change_flags) |
5f5c8ee5 GM |
1627 | { |
1628 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1629 | int x0 = x, y0 = y; | |
1630 | int wmax = 0, hmax = 0; | |
1631 | struct dim total; | |
1632 | struct dim dim; | |
1633 | struct window *w; | |
59ea14cd | 1634 | bool in_horz_combination_p; |
5f5c8ee5 GM |
1635 | |
1636 | /* What combination is WINDOW part of? Compute this once since the | |
1637 | result is the same for all windows in the `next' chain. The | |
1638 | special case of a root window (parent equal to nil) is treated | |
1639 | like a vertical combination because a root window's `next' | |
1640 | points to the mini-buffer window, if any, which is arranged | |
1641 | vertically below other windows. */ | |
1642 | in_horz_combination_p | |
d3d50620 DA |
1643 | = (!NILP (XWINDOW (window)->parent) |
1644 | && !NILP (XWINDOW (XWINDOW (window)->parent)->hchild)); | |
5f5c8ee5 GM |
1645 | |
1646 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1647 | do |
5f5c8ee5 GM |
1648 | { |
1649 | w = XWINDOW (window); | |
1650 | ||
1651 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1652 | on whether this is a combination or a leaf window. */ |
d3d50620 DA |
1653 | if (!NILP (w->hchild)) |
1654 | dim = allocate_matrices_for_frame_redisplay (w->hchild, x, y, | |
5f5c8ee5 GM |
1655 | dim_only_p, |
1656 | window_change_flags); | |
d3d50620 DA |
1657 | else if (!NILP (w->vchild)) |
1658 | dim = allocate_matrices_for_frame_redisplay (w->vchild, x, y, | |
5f5c8ee5 GM |
1659 | dim_only_p, |
1660 | window_change_flags); | |
1661 | else | |
1662 | { | |
1663 | /* If not already done, allocate sub-matrix structures. */ | |
1664 | if (w->desired_matrix == NULL) | |
1665 | { | |
1666 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1667 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1668 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1669 | } | |
177c0ea7 | 1670 | |
5f5c8ee5 GM |
1671 | /* Width and height MUST be chosen so that there are no |
1672 | holes in the frame matrix. */ | |
5d3cc43c GM |
1673 | dim.width = required_matrix_width (w); |
1674 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1675 | |
1676 | /* Will matrix be re-allocated? */ | |
1677 | if (x != w->desired_matrix->matrix_x | |
1678 | || y != w->desired_matrix->matrix_y | |
1679 | || dim.width != w->desired_matrix->matrix_w | |
1680 | || dim.height != w->desired_matrix->matrix_h | |
1681 | || (margin_glyphs_to_reserve (w, dim.width, | |
d3d50620 | 1682 | w->left_margin_cols) |
5f5c8ee5 GM |
1683 | != w->desired_matrix->left_margin_glyphs) |
1684 | || (margin_glyphs_to_reserve (w, dim.width, | |
d3d50620 | 1685 | w->right_margin_cols) |
5f5c8ee5 GM |
1686 | != w->desired_matrix->right_margin_glyphs)) |
1687 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1688 | ||
1689 | /* Actually change matrices, if allowed. Do not consider | |
1690 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1691 | may have been changed which we don't now here. We trust | |
59ea14cd | 1692 | that we only will be called with DIM_ONLY_P when |
5f5c8ee5 GM |
1693 | necessary. */ |
1694 | if (!dim_only_p) | |
1695 | { | |
1696 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1697 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1698 | } | |
1699 | } | |
1700 | ||
1701 | /* If we are part of a horizontal combination, advance x for | |
1702 | windows to the right of W; otherwise advance y for windows | |
1703 | below W. */ | |
1704 | if (in_horz_combination_p) | |
1705 | x += dim.width; | |
177c0ea7 | 1706 | else |
5f5c8ee5 GM |
1707 | y += dim.height; |
1708 | ||
1709 | /* Remember maximum glyph matrix dimensions. */ | |
1710 | wmax = max (wmax, dim.width); | |
1711 | hmax = max (hmax, dim.height); | |
1712 | ||
1713 | /* Next window on same level. */ | |
d3d50620 | 1714 | window = w->next; |
5f5c8ee5 GM |
1715 | } |
1716 | while (!NILP (window)); | |
1717 | ||
1718 | /* Set `total' to the total glyph matrix dimension of this window | |
1719 | level. In a vertical combination, the width is the width of the | |
1720 | widest window; the height is the y we finally reached, corrected | |
1721 | by the y we started with. In a horizontal combination, the total | |
1722 | height is the height of the tallest window, and the width is the | |
1723 | x we finally reached, corrected by the x we started with. */ | |
1724 | if (in_horz_combination_p) | |
1725 | { | |
1726 | total.width = x - x0; | |
1727 | total.height = hmax; | |
1728 | } | |
177c0ea7 | 1729 | else |
5f5c8ee5 GM |
1730 | { |
1731 | total.width = wmax; | |
1732 | total.height = y - y0; | |
1733 | } | |
1734 | ||
1735 | return total; | |
1736 | } | |
1737 | ||
1738 | ||
5d3cc43c GM |
1739 | /* Return the required height of glyph matrices for window W. */ |
1740 | ||
2f7c71a1 | 1741 | static int |
971de7fb | 1742 | required_matrix_height (struct window *w) |
5d3cc43c GM |
1743 | { |
1744 | #ifdef HAVE_WINDOW_SYSTEM | |
d3d50620 | 1745 | struct frame *f = XFRAME (w->frame); |
177c0ea7 | 1746 | |
5d3cc43c GM |
1747 | if (FRAME_WINDOW_P (f)) |
1748 | { | |
1749 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1ea40aa2 | 1750 | int window_pixel_height = window_box_height (w) + eabs (w->vscroll); |
5d3cc43c | 1751 | return (((window_pixel_height + ch_height - 1) |
cc834cf9 | 1752 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
1753 | /* One partially visible line at the top and |
1754 | bottom of the window. */ | |
1755 | + 2 | |
153a073c | 1756 | /* 2 for header and mode line. */ |
5d3cc43c GM |
1757 | + 2); |
1758 | } | |
1759 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 1760 | |
7df02016 | 1761 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
1762 | } |
1763 | ||
1764 | ||
1765 | /* Return the required width of glyph matrices for window W. */ | |
1766 | ||
2f7c71a1 | 1767 | static int |
971de7fb | 1768 | required_matrix_width (struct window *w) |
5d3cc43c GM |
1769 | { |
1770 | #ifdef HAVE_WINDOW_SYSTEM | |
d3d50620 | 1771 | struct frame *f = XFRAME (w->frame); |
5d3cc43c GM |
1772 | if (FRAME_WINDOW_P (f)) |
1773 | { | |
1774 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 1775 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 1776 | |
5d3cc43c GM |
1777 | /* Compute number of glyphs needed in a glyph row. */ |
1778 | return (((window_pixel_width + ch_width - 1) | |
cc834cf9 | 1779 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
1780 | /* 2 partially visible columns in the text area. */ |
1781 | + 2 | |
1782 | /* One partially visible column at the right | |
1783 | edge of each marginal area. */ | |
1784 | + 1 + 1); | |
1785 | } | |
1786 | #endif /* HAVE_WINDOW_SYSTEM */ | |
1787 | ||
d3d50620 | 1788 | return XINT (w->total_cols); |
5d3cc43c GM |
1789 | } |
1790 | ||
1791 | ||
5f5c8ee5 | 1792 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 1793 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 1794 | |
5f5c8ee5 | 1795 | static void |
971de7fb | 1796 | allocate_matrices_for_window_redisplay (struct window *w) |
5f5c8ee5 | 1797 | { |
5f5c8ee5 GM |
1798 | while (w) |
1799 | { | |
d3d50620 DA |
1800 | if (!NILP (w->vchild)) |
1801 | allocate_matrices_for_window_redisplay (XWINDOW (w->vchild)); | |
1802 | else if (!NILP (w->hchild)) | |
1803 | allocate_matrices_for_window_redisplay (XWINDOW (w->hchild)); | |
5f5c8ee5 GM |
1804 | else |
1805 | { | |
1806 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
1807 | struct dim dim; |
1808 | ||
1809 | /* If matrices are not yet allocated, allocate them now. */ | |
1810 | if (w->desired_matrix == NULL) | |
1811 | { | |
1812 | w->desired_matrix = new_glyph_matrix (NULL); | |
1813 | w->current_matrix = new_glyph_matrix (NULL); | |
1814 | } | |
1815 | ||
5d3cc43c GM |
1816 | dim.width = required_matrix_width (w); |
1817 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1818 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
1819 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
1820 | } | |
177c0ea7 | 1821 | |
d3d50620 | 1822 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
5f5c8ee5 GM |
1823 | } |
1824 | } | |
1825 | ||
1826 | ||
1827 | /* Re-allocate/ re-compute glyph matrices on frame F. If F is null, | |
1828 | do it for all frames; otherwise do it just for the given frame. | |
1829 | This function must be called when a new frame is created, its size | |
1830 | changes, or its window configuration changes. */ | |
1831 | ||
1832 | void | |
971de7fb | 1833 | adjust_glyphs (struct frame *f) |
5f5c8ee5 | 1834 | { |
408f5064 GM |
1835 | /* Block input so that expose events and other events that access |
1836 | glyph matrices are not processed while we are changing them. */ | |
4d7e6e51 | 1837 | block_input (); |
408f5064 | 1838 | |
5f5c8ee5 GM |
1839 | if (f) |
1840 | adjust_frame_glyphs (f); | |
1841 | else | |
1842 | { | |
1843 | Lisp_Object tail, lisp_frame; | |
177c0ea7 | 1844 | |
5f5c8ee5 GM |
1845 | FOR_EACH_FRAME (tail, lisp_frame) |
1846 | adjust_frame_glyphs (XFRAME (lisp_frame)); | |
1847 | } | |
408f5064 | 1848 | |
4d7e6e51 | 1849 | unblock_input (); |
5f5c8ee5 GM |
1850 | } |
1851 | ||
1852 | ||
1853 | /* Adjust frame glyphs when Emacs is initialized. | |
177c0ea7 JB |
1854 | |
1855 | To be called from init_display. | |
1856 | ||
5f5c8ee5 GM |
1857 | We need a glyph matrix because redraw will happen soon. |
1858 | Unfortunately, window sizes on selected_frame are not yet set to | |
1859 | meaningful values. I believe we can assume that there are only two | |
1860 | windows on the frame---the mini-buffer and the root window. Frame | |
1861 | height and width seem to be correct so far. So, set the sizes of | |
1862 | windows to estimated values. */ | |
1863 | ||
1864 | static void | |
971de7fb | 1865 | adjust_frame_glyphs_initially (void) |
5f5c8ee5 | 1866 | { |
91fb7e1b | 1867 | struct frame *sf = SELECTED_FRAME (); |
e69b0960 | 1868 | struct window *root = XWINDOW (sf->root_window); |
d3d50620 | 1869 | struct window *mini = XWINDOW (root->next); |
7df02016 KS |
1870 | int frame_lines = FRAME_LINES (sf); |
1871 | int frame_cols = FRAME_COLS (sf); | |
91fb7e1b | 1872 | int top_margin = FRAME_TOP_MARGIN (sf); |
5f5c8ee5 GM |
1873 | |
1874 | /* Do it for the root window. */ | |
e8c17b81 PE |
1875 | wset_top_line (root, make_number (top_margin)); |
1876 | wset_total_lines (root, make_number (frame_lines - 1 - top_margin)); | |
1877 | wset_total_cols (root, make_number (frame_cols)); | |
5f5c8ee5 GM |
1878 | |
1879 | /* Do it for the mini-buffer window. */ | |
e8c17b81 PE |
1880 | wset_top_line (mini, make_number (frame_lines - 1)); |
1881 | wset_total_lines (mini, make_number (1)); | |
1882 | wset_total_cols (mini, make_number (frame_cols)); | |
5f5c8ee5 | 1883 | |
91fb7e1b | 1884 | adjust_frame_glyphs (sf); |
5f5c8ee5 GM |
1885 | glyphs_initialized_initially_p = 1; |
1886 | } | |
177c0ea7 | 1887 | |
5f5c8ee5 GM |
1888 | |
1889 | /* Allocate/reallocate glyph matrices of a single frame F. */ | |
1890 | ||
1891 | static void | |
971de7fb | 1892 | adjust_frame_glyphs (struct frame *f) |
5f5c8ee5 GM |
1893 | { |
1894 | if (FRAME_WINDOW_P (f)) | |
1895 | adjust_frame_glyphs_for_window_redisplay (f); | |
1896 | else | |
1897 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 1898 | |
5f5c8ee5 GM |
1899 | /* Don't forget the message buffer and the buffer for |
1900 | decode_mode_spec. */ | |
1901 | adjust_frame_message_buffer (f); | |
1902 | adjust_decode_mode_spec_buffer (f); | |
1903 | ||
1904 | f->glyphs_initialized_p = 1; | |
1905 | } | |
1906 | ||
59ea14cd | 1907 | /* Return true if any window in the tree has nonzero window margins. See |
075757cc | 1908 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ |
59ea14cd | 1909 | static bool |
971de7fb | 1910 | showing_window_margins_p (struct window *w) |
075757cc CY |
1911 | { |
1912 | while (w) | |
1913 | { | |
d3d50620 | 1914 | if (!NILP (w->hchild)) |
075757cc | 1915 | { |
d3d50620 | 1916 | if (showing_window_margins_p (XWINDOW (w->hchild))) |
075757cc CY |
1917 | return 1; |
1918 | } | |
d3d50620 | 1919 | else if (!NILP (w->vchild)) |
075757cc | 1920 | { |
d3d50620 | 1921 | if (showing_window_margins_p (XWINDOW (w->vchild))) |
075757cc CY |
1922 | return 1; |
1923 | } | |
d3d50620 DA |
1924 | else if (!NILP (w->left_margin_cols) |
1925 | || !NILP (w->right_margin_cols)) | |
075757cc | 1926 | return 1; |
3fc809e2 | 1927 | |
d3d50620 | 1928 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
075757cc CY |
1929 | } |
1930 | return 0; | |
1931 | } | |
1932 | ||
5f5c8ee5 | 1933 | |
c9f00270 GM |
1934 | /* In the window tree with root W, build current matrices of leaf |
1935 | windows from the frame's current matrix. */ | |
1936 | ||
1937 | static void | |
971de7fb | 1938 | fake_current_matrices (Lisp_Object window) |
c9f00270 GM |
1939 | { |
1940 | struct window *w; | |
177c0ea7 | 1941 | |
d3d50620 | 1942 | for (; !NILP (window); window = w->next) |
c9f00270 GM |
1943 | { |
1944 | w = XWINDOW (window); | |
177c0ea7 | 1945 | |
d3d50620 DA |
1946 | if (!NILP (w->hchild)) |
1947 | fake_current_matrices (w->hchild); | |
1948 | else if (!NILP (w->vchild)) | |
1949 | fake_current_matrices (w->vchild); | |
c9f00270 GM |
1950 | else |
1951 | { | |
1952 | int i; | |
d3d50620 | 1953 | struct frame *f = XFRAME (w->frame); |
c9f00270 GM |
1954 | struct glyph_matrix *m = w->current_matrix; |
1955 | struct glyph_matrix *fm = f->current_matrix; | |
1956 | ||
a54e2c05 DA |
1957 | eassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
1958 | eassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 1959 | |
c9f00270 GM |
1960 | for (i = 0; i < m->matrix_h; ++i) |
1961 | { | |
1962 | struct glyph_row *r = m->rows + i; | |
7df02016 | 1963 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 | 1964 | |
a54e2c05 | 1965 | eassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] |
c9f00270 GM |
1966 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); |
1967 | ||
1968 | r->enabled_p = fr->enabled_p; | |
1969 | if (r->enabled_p) | |
1970 | { | |
1971 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
1972 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
1973 | r->used[TEXT_AREA] = (m->matrix_w | |
1974 | - r->used[LEFT_MARGIN_AREA] | |
1975 | - r->used[RIGHT_MARGIN_AREA]); | |
1976 | r->mode_line_p = 0; | |
c9f00270 GM |
1977 | } |
1978 | } | |
1979 | } | |
1980 | } | |
1981 | } | |
1982 | ||
1983 | ||
bccee4f2 | 1984 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 1985 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 1986 | |
bccee4f2 | 1987 | static struct glyph_matrix * |
971de7fb | 1988 | save_current_matrix (struct frame *f) |
c9f00270 | 1989 | { |
bccee4f2 | 1990 | int i; |
38182d90 | 1991 | struct glyph_matrix *saved = xzalloc (sizeof *saved); |
bccee4f2 | 1992 | saved->nrows = f->current_matrix->nrows; |
23f86fce | 1993 | saved->rows = xzalloc (saved->nrows * sizeof *saved->rows); |
bccee4f2 GM |
1994 | |
1995 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 1996 | { |
bccee4f2 GM |
1997 | struct glyph_row *from = f->current_matrix->rows + i; |
1998 | struct glyph_row *to = saved->rows + i; | |
dfd153ae | 1999 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
23f86fce | 2000 | to->glyphs[TEXT_AREA] = xmalloc (nbytes); |
72af86bd | 2001 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
bccee4f2 | 2002 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
e797dea6 | 2003 | } |
bccee4f2 GM |
2004 | |
2005 | return saved; | |
2006 | } | |
2007 | ||
2008 | ||
2009 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
2010 | and free memory associated with SAVED. */ | |
2011 | ||
2012 | static void | |
971de7fb | 2013 | restore_current_matrix (struct frame *f, struct glyph_matrix *saved) |
bccee4f2 GM |
2014 | { |
2015 | int i; | |
2016 | ||
2017 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 2018 | { |
bccee4f2 GM |
2019 | struct glyph_row *from = saved->rows + i; |
2020 | struct glyph_row *to = f->current_matrix->rows + i; | |
dfd153ae | 2021 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
72af86bd | 2022 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
e797dea6 | 2023 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
bccee4f2 | 2024 | xfree (from->glyphs[TEXT_AREA]); |
e797dea6 | 2025 | } |
177c0ea7 | 2026 | |
bccee4f2 GM |
2027 | xfree (saved->rows); |
2028 | xfree (saved); | |
c9f00270 GM |
2029 | } |
2030 | ||
2031 | ||
bccee4f2 | 2032 | |
5f5c8ee5 GM |
2033 | /* Allocate/reallocate glyph matrices of a single frame F for |
2034 | frame-based redisplay. */ | |
2035 | ||
2036 | static void | |
971de7fb | 2037 | adjust_frame_glyphs_for_frame_redisplay (struct frame *f) |
5f5c8ee5 | 2038 | { |
5f5c8ee5 | 2039 | struct dim matrix_dim; |
59ea14cd | 2040 | bool pool_changed_p; |
5f5c8ee5 GM |
2041 | int window_change_flags; |
2042 | int top_window_y; | |
2043 | ||
2044 | if (!FRAME_LIVE_P (f)) | |
2045 | return; | |
2046 | ||
5f5c8ee5 GM |
2047 | top_window_y = FRAME_TOP_MARGIN (f); |
2048 | ||
2049 | /* Allocate glyph pool structures if not already done. */ | |
2050 | if (f->desired_pool == NULL) | |
2051 | { | |
2052 | f->desired_pool = new_glyph_pool (); | |
2053 | f->current_pool = new_glyph_pool (); | |
2054 | } | |
2055 | ||
2056 | /* Allocate frames matrix structures if needed. */ | |
2057 | if (f->desired_matrix == NULL) | |
2058 | { | |
2059 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
2060 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
2061 | } | |
177c0ea7 | 2062 | |
5f5c8ee5 GM |
2063 | /* Compute window glyph matrices. (This takes the mini-buffer |
2064 | window into account). The result is the size of the frame glyph | |
2065 | matrix needed. The variable window_change_flags is set to a bit | |
2066 | mask indicating whether new matrices will be allocated or | |
2067 | existing matrices change their size or location within the frame | |
2068 | matrix. */ | |
2069 | window_change_flags = 0; | |
2070 | matrix_dim | |
2071 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
2072 | 0, top_window_y, | |
5d3cc43c | 2073 | 1, |
5f5c8ee5 GM |
2074 | &window_change_flags); |
2075 | ||
2076 | /* Add in menu bar lines, if any. */ | |
2077 | matrix_dim.height += top_window_y; | |
2078 | ||
2079 | /* Enlarge pools as necessary. */ | |
2080 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
2081 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
2082 | ||
177c0ea7 | 2083 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
2084 | absolutely necessary since it requires a frame redraw. */ |
2085 | if (pool_changed_p || window_change_flags) | |
2086 | { | |
2087 | /* Do it for window matrices. */ | |
2088 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 2089 | 0, top_window_y, 0, |
5f5c8ee5 GM |
2090 | &window_change_flags); |
2091 | ||
2092 | /* Size of frame matrices must equal size of frame. Note | |
2093 | that we are called for X frames with window widths NOT equal | |
2094 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
a54e2c05 | 2095 | eassert (matrix_dim.width == FRAME_COLS (f) |
7df02016 | 2096 | && matrix_dim.height == FRAME_LINES (f)); |
177c0ea7 | 2097 | |
e797dea6 GM |
2098 | /* Pointers to glyph memory in glyph rows are exchanged during |
2099 | the update phase of redisplay, which means in general that a | |
2100 | frame's current matrix consists of pointers into both the | |
2101 | desired and current glyph pool of the frame. Adjusting a | |
2102 | matrix sets the frame matrix up so that pointers are all into | |
2103 | the same pool. If we want to preserve glyph contents of the | |
2104 | current matrix over a call to adjust_glyph_matrix, we must | |
2105 | make a copy of the current glyphs, and restore the current | |
2106 | matrix' contents from that copy. */ | |
2107 | if (display_completed | |
2108 | && !FRAME_GARBAGED_P (f) | |
2109 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
2110 | && matrix_dim.height == f->current_matrix->matrix_h |
2111 | /* For some reason, the frame glyph matrix gets corrupted if | |
2112 | any of the windows contain margins. I haven't been able | |
2113 | to hunt down the reason, but for the moment this prevents | |
2114 | the problem from manifesting. -- cyd */ | |
d5c20fe8 | 2115 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) |
e797dea6 | 2116 | { |
bccee4f2 GM |
2117 | struct glyph_matrix *copy = save_current_matrix (f); |
2118 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2119 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2120 | restore_current_matrix (f, copy); |
e797dea6 GM |
2121 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2122 | } | |
c9f00270 | 2123 | else |
e797dea6 | 2124 | { |
bccee4f2 | 2125 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2126 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2127 | SET_FRAME_GARBAGED (f); | |
2128 | } | |
5f5c8ee5 GM |
2129 | } |
2130 | } | |
2131 | ||
2132 | ||
2133 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2134 | window-based redisplay. */ | |
2135 | ||
2136 | static void | |
971de7fb | 2137 | adjust_frame_glyphs_for_window_redisplay (struct frame *f) |
5f5c8ee5 | 2138 | { |
a54e2c05 | 2139 | eassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); |
177c0ea7 | 2140 | |
5f5c8ee5 | 2141 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2142 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2143 | |
8ce2650d | 2144 | #ifdef HAVE_X_WINDOWS |
5f5c8ee5 GM |
2145 | /* Allocate/ reallocate matrices of the dummy window used to display |
2146 | the menu bar under X when no X toolkit support is available. */ | |
488dd4c4 | 2147 | #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2148 | { |
2149 | /* Allocate a dummy window if not already done. */ | |
d2d37ddc | 2150 | struct window *w; |
e69b0960 | 2151 | if (NILP (f->menu_bar_window)) |
5f5c8ee5 | 2152 | { |
077288cf | 2153 | Lisp_Object frame; |
f00af5b1 | 2154 | fset_menu_bar_window (f, make_window ()); |
e69b0960 | 2155 | w = XWINDOW (f->menu_bar_window); |
077288cf | 2156 | XSETFRAME (frame, f); |
e8c17b81 | 2157 | wset_frame (w, frame); |
5f5c8ee5 GM |
2158 | w->pseudo_window_p = 1; |
2159 | } | |
2160 | else | |
e69b0960 | 2161 | w = XWINDOW (f->menu_bar_window); |
5f5c8ee5 GM |
2162 | |
2163 | /* Set window dimensions to frame dimensions and allocate or | |
2164 | adjust glyph matrices of W. */ | |
e8c17b81 PE |
2165 | wset_top_line (w, make_number (0)); |
2166 | wset_left_col (w, make_number (0)); | |
2167 | wset_total_lines (w, make_number (FRAME_MENU_BAR_LINES (f))); | |
2168 | wset_total_cols (w, make_number (FRAME_TOTAL_COLS (f))); | |
5d3cc43c | 2169 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2170 | } |
57714a86 YM |
2171 | #endif /* not USE_X_TOOLKIT && not USE_GTK */ |
2172 | #endif /* HAVE_X_WINDOWS */ | |
5f5c8ee5 | 2173 | |
488dd4c4 | 2174 | #ifndef USE_GTK |
d2d37ddc PE |
2175 | { |
2176 | /* Allocate/ reallocate matrices of the tool bar window. If we | |
2177 | don't have a tool bar window yet, make one. */ | |
2178 | struct window *w; | |
e69b0960 | 2179 | if (NILP (f->tool_bar_window)) |
d2d37ddc | 2180 | { |
077288cf | 2181 | Lisp_Object frame; |
f00af5b1 | 2182 | fset_tool_bar_window (f, make_window ()); |
e69b0960 | 2183 | w = XWINDOW (f->tool_bar_window); |
077288cf | 2184 | XSETFRAME (frame, f); |
e8c17b81 | 2185 | wset_frame (w, frame); |
d2d37ddc PE |
2186 | w->pseudo_window_p = 1; |
2187 | } | |
2188 | else | |
e69b0960 | 2189 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2190 | |
e8c17b81 PE |
2191 | wset_top_line (w, make_number (FRAME_MENU_BAR_LINES (f))); |
2192 | wset_left_col (w, make_number (0)); | |
2193 | wset_total_lines (w, make_number (FRAME_TOOL_BAR_LINES (f))); | |
2194 | wset_total_cols (w, make_number (FRAME_TOTAL_COLS (f))); | |
d2d37ddc PE |
2195 | allocate_matrices_for_window_redisplay (w); |
2196 | } | |
488dd4c4 | 2197 | #endif |
5f5c8ee5 GM |
2198 | } |
2199 | ||
2200 | ||
177c0ea7 | 2201 | /* Adjust/ allocate message buffer of frame F. |
5f5c8ee5 | 2202 | |
5f5c8ee5 GM |
2203 | Note that the message buffer is never freed. Since I could not |
2204 | find a free in 19.34, I assume that freeing it would be | |
2205 | problematic in some way and don't do it either. | |
2206 | ||
2207 | (Implementation note: It should be checked if we can free it | |
2208 | eventually without causing trouble). */ | |
2209 | ||
2210 | static void | |
971de7fb | 2211 | adjust_frame_message_buffer (struct frame *f) |
5f5c8ee5 | 2212 | { |
38182d90 PE |
2213 | FRAME_MESSAGE_BUF (f) = xrealloc (FRAME_MESSAGE_BUF (f), |
2214 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
5f5c8ee5 GM |
2215 | } |
2216 | ||
2217 | ||
2218 | /* Re-allocate buffer for decode_mode_spec on frame F. */ | |
2219 | ||
2220 | static void | |
971de7fb | 2221 | adjust_decode_mode_spec_buffer (struct frame *f) |
5f5c8ee5 | 2222 | { |
38182d90 PE |
2223 | f->decode_mode_spec_buffer = xrealloc (f->decode_mode_spec_buffer, |
2224 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
5f5c8ee5 GM |
2225 | } |
2226 | ||
2227 | ||
2228 | \f | |
2229 | /********************************************************************** | |
2230 | Freeing Glyph Matrices | |
2231 | **********************************************************************/ | |
2232 | ||
2233 | /* Free glyph memory for a frame F. F may be null. This function can | |
2234 | be called for the same frame more than once. The root window of | |
2235 | F may be nil when this function is called. This is the case when | |
2236 | the function is called when F is destroyed. */ | |
2237 | ||
2238 | void | |
971de7fb | 2239 | free_glyphs (struct frame *f) |
5f5c8ee5 GM |
2240 | { |
2241 | if (f && f->glyphs_initialized_p) | |
2242 | { | |
42f55fe0 GM |
2243 | /* Block interrupt input so that we don't get surprised by an X |
2244 | event while we're in an inconsistent state. */ | |
4d7e6e51 | 2245 | block_input (); |
5f5c8ee5 | 2246 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2247 | |
5f5c8ee5 | 2248 | /* Release window sub-matrices. */ |
e69b0960 DA |
2249 | if (!NILP (f->root_window)) |
2250 | free_window_matrices (XWINDOW (f->root_window)); | |
5f5c8ee5 GM |
2251 | |
2252 | /* Free the dummy window for menu bars without X toolkit and its | |
2253 | glyph matrices. */ | |
e69b0960 | 2254 | if (!NILP (f->menu_bar_window)) |
5f5c8ee5 | 2255 | { |
e69b0960 | 2256 | struct window *w = XWINDOW (f->menu_bar_window); |
5f5c8ee5 GM |
2257 | free_glyph_matrix (w->desired_matrix); |
2258 | free_glyph_matrix (w->current_matrix); | |
2259 | w->desired_matrix = w->current_matrix = NULL; | |
f00af5b1 | 2260 | fset_menu_bar_window (f, Qnil); |
5f5c8ee5 GM |
2261 | } |
2262 | ||
9ea173e8 | 2263 | /* Free the tool bar window and its glyph matrices. */ |
e69b0960 | 2264 | if (!NILP (f->tool_bar_window)) |
5f5c8ee5 | 2265 | { |
e69b0960 | 2266 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2267 | free_glyph_matrix (w->desired_matrix); |
2268 | free_glyph_matrix (w->current_matrix); | |
2269 | w->desired_matrix = w->current_matrix = NULL; | |
f00af5b1 | 2270 | fset_tool_bar_window (f, Qnil); |
5f5c8ee5 GM |
2271 | } |
2272 | ||
2273 | /* Release frame glyph matrices. Reset fields to zero in | |
2274 | case we are called a second time. */ | |
2275 | if (f->desired_matrix) | |
2276 | { | |
2277 | free_glyph_matrix (f->desired_matrix); | |
2278 | free_glyph_matrix (f->current_matrix); | |
2279 | f->desired_matrix = f->current_matrix = NULL; | |
2280 | } | |
2281 | ||
2282 | /* Release glyph pools. */ | |
2283 | if (f->desired_pool) | |
2284 | { | |
2285 | free_glyph_pool (f->desired_pool); | |
2286 | free_glyph_pool (f->current_pool); | |
2287 | f->desired_pool = f->current_pool = NULL; | |
2288 | } | |
177c0ea7 | 2289 | |
4d7e6e51 | 2290 | unblock_input (); |
5f5c8ee5 GM |
2291 | } |
2292 | } | |
2293 | ||
2294 | ||
2295 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2296 | function may be called with a null pointer, and it may be called on | |
2297 | the same tree more than once. */ | |
2298 | ||
2299 | void | |
971de7fb | 2300 | free_window_matrices (struct window *w) |
5f5c8ee5 GM |
2301 | { |
2302 | while (w) | |
2303 | { | |
d3d50620 DA |
2304 | if (!NILP (w->hchild)) |
2305 | free_window_matrices (XWINDOW (w->hchild)); | |
2306 | else if (!NILP (w->vchild)) | |
2307 | free_window_matrices (XWINDOW (w->vchild)); | |
177c0ea7 | 2308 | else |
5f5c8ee5 GM |
2309 | { |
2310 | /* This is a leaf window. Free its memory and reset fields | |
2311 | to zero in case this function is called a second time for | |
2312 | W. */ | |
2313 | free_glyph_matrix (w->current_matrix); | |
2314 | free_glyph_matrix (w->desired_matrix); | |
2315 | w->current_matrix = w->desired_matrix = NULL; | |
2316 | } | |
2317 | ||
2318 | /* Next window on same level. */ | |
d3d50620 | 2319 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2320 | } |
2321 | } | |
2322 | ||
2323 | ||
2324 | /* Check glyph memory leaks. This function is called from | |
2325 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2326 | exits. We therefore free all glyph memory for all active frames | |
2327 | explicitly and check that nothing is left allocated. */ | |
2328 | ||
2329 | void | |
971de7fb | 2330 | check_glyph_memory (void) |
5f5c8ee5 GM |
2331 | { |
2332 | Lisp_Object tail, frame; | |
2333 | ||
2334 | /* Free glyph memory for all frames. */ | |
2335 | FOR_EACH_FRAME (tail, frame) | |
2336 | free_glyphs (XFRAME (frame)); | |
2337 | ||
2338 | /* Check that nothing is left allocated. */ | |
2339 | if (glyph_matrix_count) | |
1088b922 | 2340 | emacs_abort (); |
5f5c8ee5 | 2341 | if (glyph_pool_count) |
1088b922 | 2342 | emacs_abort (); |
5f5c8ee5 GM |
2343 | } |
2344 | ||
2345 | ||
2346 | \f | |
2347 | /********************************************************************** | |
2348 | Building a Frame Matrix | |
2349 | **********************************************************************/ | |
2350 | ||
2351 | /* Most of the redisplay code works on glyph matrices attached to | |
2352 | windows. This is a good solution most of the time, but it is not | |
2353 | suitable for terminal code. Terminal output functions cannot rely | |
2354 | on being able to set an arbitrary terminal window. Instead they | |
2355 | must be provided with a view of the whole frame, i.e. the whole | |
2356 | screen. We build such a view by constructing a frame matrix from | |
2357 | window matrices in this section. | |
2358 | ||
2359 | Windows that must be updated have their must_be_update_p flag set. | |
2360 | For all such windows, their desired matrix is made part of the | |
2361 | desired frame matrix. For other windows, their current matrix is | |
2362 | made part of the desired frame matrix. | |
2363 | ||
2364 | +-----------------+----------------+ | |
2365 | | desired | desired | | |
2366 | | | | | |
2367 | +-----------------+----------------+ | |
2368 | | current | | |
2369 | | | | |
2370 | +----------------------------------+ | |
2371 | ||
2372 | Desired window matrices can be made part of the frame matrix in a | |
2373 | cheap way: We exploit the fact that the desired frame matrix and | |
2374 | desired window matrices share their glyph memory. This is not | |
2375 | possible for current window matrices. Their glyphs are copied to | |
2376 | the desired frame matrix. The latter is equivalent to | |
2377 | preserve_other_columns in the old redisplay. | |
2378 | ||
2379 | Used glyphs counters for frame matrix rows are the result of adding | |
2380 | up glyph lengths of the window matrices. A line in the frame | |
2381 | matrix is enabled, if a corresponding line in a window matrix is | |
2382 | enabled. | |
177c0ea7 | 2383 | |
5f5c8ee5 GM |
2384 | After building the desired frame matrix, it will be passed to |
2385 | terminal code, which will manipulate both the desired and current | |
2386 | frame matrix. Changes applied to the frame's current matrix have | |
2387 | to be visible in current window matrices afterwards, of course. | |
2388 | ||
2389 | This problem is solved like this: | |
2390 | ||
2391 | 1. Window and frame matrices share glyphs. Window matrices are | |
2392 | constructed in a way that their glyph contents ARE the glyph | |
2393 | contents needed in a frame matrix. Thus, any modification of | |
2394 | glyphs done in terminal code will be reflected in window matrices | |
2395 | automatically. | |
177c0ea7 | 2396 | |
5f5c8ee5 GM |
2397 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2398 | intercepted by hook functions so that corresponding row operations | |
2399 | on window matrices can be performed. This is necessary because we | |
2400 | use pointers to glyphs in glyph row structures. To satisfy the | |
2401 | assumption of point 1 above that glyphs are updated implicitly in | |
2402 | window matrices when they are manipulated via the frame matrix, | |
2403 | window and frame matrix must of course agree where to find the | |
2404 | glyphs for their rows. Possible manipulations that must be | |
2405 | mirrored are assignments of rows of the desired frame matrix to the | |
2406 | current frame matrix and scrolling the current frame matrix. */ | |
2407 | ||
2408 | /* Build frame F's desired matrix from window matrices. Only windows | |
2409 | which have the flag must_be_updated_p set have to be updated. Menu | |
2410 | bar lines of a frame are not covered by window matrices, so make | |
2411 | sure not to touch them in this function. */ | |
2412 | ||
2413 | static void | |
971de7fb | 2414 | build_frame_matrix (struct frame *f) |
5f5c8ee5 GM |
2415 | { |
2416 | int i; | |
2417 | ||
2418 | /* F must have a frame matrix when this function is called. */ | |
a54e2c05 | 2419 | eassert (!FRAME_WINDOW_P (f)); |
177c0ea7 | 2420 | |
5f5c8ee5 GM |
2421 | /* Clear all rows in the frame matrix covered by window matrices. |
2422 | Menu bar lines are not covered by windows. */ | |
2423 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2424 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2425 | ||
2426 | /* Build the matrix by walking the window tree. */ | |
2427 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2428 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2429 | } | |
2430 | ||
2431 | ||
2432 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2433 | matrices. W is the root of a window tree. */ | |
2434 | ||
2435 | static void | |
971de7fb | 2436 | build_frame_matrix_from_window_tree (struct glyph_matrix *matrix, struct window *w) |
5f5c8ee5 GM |
2437 | { |
2438 | while (w) | |
2439 | { | |
d3d50620 DA |
2440 | if (!NILP (w->hchild)) |
2441 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->hchild)); | |
2442 | else if (!NILP (w->vchild)) | |
2443 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->vchild)); | |
5f5c8ee5 GM |
2444 | else |
2445 | build_frame_matrix_from_leaf_window (matrix, w); | |
2446 | ||
d3d50620 | 2447 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2448 | } |
2449 | } | |
2450 | ||
2451 | ||
2452 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2453 | desired frame matrix built. W is a leaf window whose desired or | |
2454 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2455 | must_be_updated_p determines which matrix it contributes to | |
59ea14cd | 2456 | FRAME_MATRIX. If W->must_be_updated_p, W's desired matrix |
5f5c8ee5 GM |
2457 | is added to FRAME_MATRIX, otherwise W's current matrix is added. |
2458 | Adding a desired matrix means setting up used counters and such in | |
2459 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2460 | means copying glyphs. The latter case corresponds to | |
2461 | preserve_other_columns in the old redisplay. */ | |
2462 | ||
2463 | static void | |
971de7fb | 2464 | build_frame_matrix_from_leaf_window (struct glyph_matrix *frame_matrix, struct window *w) |
5f5c8ee5 GM |
2465 | { |
2466 | struct glyph_matrix *window_matrix; | |
2467 | int window_y, frame_y; | |
2468 | /* If non-zero, a glyph to insert at the right border of W. */ | |
3fc809e2 KS |
2469 | GLYPH right_border_glyph; |
2470 | ||
2471 | SET_GLYPH_FROM_CHAR (right_border_glyph, 0); | |
5f5c8ee5 GM |
2472 | |
2473 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2474 | if (w->must_be_updated_p) | |
2475 | { | |
2476 | window_matrix = w->desired_matrix; | |
2477 | ||
2478 | /* Decide whether we want to add a vertical border glyph. */ | |
2479 | if (!WINDOW_RIGHTMOST_P (w)) | |
2480 | { | |
2481 | struct Lisp_Char_Table *dp = window_display_table (w); | |
3fc809e2 | 2482 | Lisp_Object gc; |
b4e49aee | 2483 | |
3fc809e2 KS |
2484 | SET_GLYPH_FROM_CHAR (right_border_glyph, '|'); |
2485 | if (dp | |
d311d28c | 2486 | && (gc = DISP_BORDER_GLYPH (dp), GLYPH_CODE_P (gc))) |
3fc809e2 KS |
2487 | { |
2488 | SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph, gc); | |
2489 | spec_glyph_lookup_face (w, &right_border_glyph); | |
2490 | } | |
b4e49aee | 2491 | |
3fc809e2 KS |
2492 | if (GLYPH_FACE (right_border_glyph) <= 0) |
2493 | SET_GLYPH_FACE (right_border_glyph, VERTICAL_BORDER_FACE_ID); | |
5f5c8ee5 GM |
2494 | } |
2495 | } | |
2496 | else | |
2497 | window_matrix = w->current_matrix; | |
2498 | ||
2499 | /* For all rows in the window matrix and corresponding rows in the | |
2500 | frame matrix. */ | |
2501 | window_y = 0; | |
2502 | frame_y = window_matrix->matrix_y; | |
2503 | while (window_y < window_matrix->nrows) | |
2504 | { | |
2505 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2506 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
59ea14cd | 2507 | bool current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2508 | |
2509 | /* Fill up the frame row with spaces up to the left margin of the | |
2510 | window row. */ | |
2511 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2512 | ||
2513 | /* Fill up areas in the window matrix row with spaces. */ | |
2514 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2515 | |
2516 | /* If only part of W's desired matrix has been built, and | |
2517 | window_row wasn't displayed, use the corresponding current | |
2518 | row instead. */ | |
2519 | if (window_matrix == w->desired_matrix | |
2520 | && !window_row->enabled_p) | |
2521 | { | |
2522 | window_row = w->current_matrix->rows + window_y; | |
2523 | current_row_p = 1; | |
2524 | } | |
177c0ea7 | 2525 | |
2a8bd25f | 2526 | if (current_row_p) |
5f5c8ee5 | 2527 | { |
2a8bd25f | 2528 | /* Copy window row to frame row. */ |
72af86bd AS |
2529 | memcpy (frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, |
2530 | window_row->glyphs[0], | |
2531 | window_matrix->matrix_w * sizeof (struct glyph)); | |
5f5c8ee5 GM |
2532 | } |
2533 | else | |
2534 | { | |
a54e2c05 | 2535 | eassert (window_row->enabled_p); |
177c0ea7 | 2536 | |
2a8bd25f GM |
2537 | /* Only when a desired row has been displayed, we want |
2538 | the corresponding frame row to be updated. */ | |
2539 | frame_row->enabled_p = 1; | |
177c0ea7 | 2540 | |
5f5c8ee5 GM |
2541 | /* Maybe insert a vertical border between horizontally adjacent |
2542 | windows. */ | |
3fc809e2 | 2543 | if (GLYPH_CHAR (right_border_glyph) != 0) |
5f5c8ee5 GM |
2544 | { |
2545 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2546 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2547 | } | |
2548 | ||
e509cfa6 | 2549 | #ifdef GLYPH_DEBUG |
a13396c9 GM |
2550 | /* Window row window_y must be a slice of frame row |
2551 | frame_y. */ | |
a54e2c05 | 2552 | eassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2553 | |
5f5c8ee5 GM |
2554 | /* If rows are in sync, we don't have to copy glyphs because |
2555 | frame and window share glyphs. */ | |
177c0ea7 | 2556 | |
a38634ff | 2557 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2558 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2559 | #endif |
5f5c8ee5 GM |
2560 | } |
2561 | ||
2562 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2563 | up with spaces, and visit leaf windows from left to right it | |
2564 | can be done simply. */ | |
177c0ea7 | 2565 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2566 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2567 | ||
5f5c8ee5 GM |
2568 | /* Next row. */ |
2569 | ++window_y; | |
2570 | ++frame_y; | |
2571 | } | |
2572 | } | |
2573 | ||
5f81871e RS |
2574 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2575 | ID, return a glyph that has a realized face ID. | |
2576 | This is used for glyphs displayed specially and not part of the text; | |
2577 | for instance, vertical separators, truncation markers, etc. */ | |
2578 | ||
3fc809e2 | 2579 | void |
971de7fb | 2580 | spec_glyph_lookup_face (struct window *w, GLYPH *glyph) |
5f81871e | 2581 | { |
3fc809e2 | 2582 | int lface_id = GLYPH_FACE (*glyph); |
5f81871e RS |
2583 | /* Convert the glyph's specified face to a realized (cache) face. */ |
2584 | if (lface_id > 0) | |
2585 | { | |
d3d50620 | 2586 | int face_id = merge_faces (XFRAME (w->frame), |
5f81871e | 2587 | Qt, lface_id, DEFAULT_FACE_ID); |
3fc809e2 | 2588 | SET_GLYPH_FACE (*glyph, face_id); |
5f81871e | 2589 | } |
5f81871e | 2590 | } |
5f5c8ee5 GM |
2591 | |
2592 | /* Add spaces to a glyph row ROW in a window matrix. | |
2593 | ||
2594 | Each row has the form: | |
2595 | ||
2596 | +---------+-----------------------------+------------+ | |
2597 | | left | text | right | | |
2598 | +---------+-----------------------------+------------+ | |
2599 | ||
2600 | Left and right marginal areas are optional. This function adds | |
2601 | spaces to areas so that there are no empty holes between areas. | |
2602 | In other words: If the right area is not empty, the text area | |
2603 | is filled up with spaces up to the right area. If the text area | |
2604 | is not empty, the left area is filled up. | |
2605 | ||
2606 | To be called for frame-based redisplay, only. */ | |
2607 | ||
2608 | static void | |
971de7fb | 2609 | fill_up_glyph_row_with_spaces (struct glyph_row *row) |
5f5c8ee5 GM |
2610 | { |
2611 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2612 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2613 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2614 | } | |
2615 | ||
2616 | ||
2617 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2618 | frame-based redisplay only. */ | |
2619 | ||
2620 | static void | |
971de7fb | 2621 | fill_up_glyph_row_area_with_spaces (struct glyph_row *row, int area) |
5f5c8ee5 GM |
2622 | { |
2623 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2624 | { | |
2625 | struct glyph *end = row->glyphs[area + 1]; | |
2626 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2627 | ||
2628 | while (text < end) | |
2629 | *text++ = space_glyph; | |
2630 | row->used[area] = text - row->glyphs[area]; | |
2631 | } | |
2632 | } | |
2633 | ||
2634 | ||
2635 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2636 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2637 | ||
2638 | static void | |
971de7fb | 2639 | fill_up_frame_row_with_spaces (struct glyph_row *row, int upto) |
5f5c8ee5 GM |
2640 | { |
2641 | int i = row->used[TEXT_AREA]; | |
2642 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2643 | |
5f5c8ee5 GM |
2644 | while (i < upto) |
2645 | glyph[i++] = space_glyph; | |
2646 | ||
2647 | row->used[TEXT_AREA] = i; | |
2648 | } | |
2649 | ||
2650 | ||
2651 | \f | |
2652 | /********************************************************************** | |
2653 | Mirroring operations on frame matrices in window matrices | |
2654 | **********************************************************************/ | |
2655 | ||
2656 | /* Set frame being updated via frame-based redisplay to F. This | |
2657 | function must be called before updates to make explicit that we are | |
2658 | working on frame matrices or not. */ | |
2659 | ||
b0ab8123 | 2660 | static void |
971de7fb | 2661 | set_frame_matrix_frame (struct frame *f) |
5f5c8ee5 GM |
2662 | { |
2663 | frame_matrix_frame = f; | |
2664 | } | |
2665 | ||
2666 | ||
2667 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2668 | DESIRED_MATRIX is the desired matrix corresponding to | |
2669 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2670 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2671 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2672 | done in frame matrices, and that we have to perform analogous | |
2673 | operations in window matrices of frame_matrix_frame. */ | |
2674 | ||
b0ab8123 | 2675 | static void |
971de7fb | 2676 | make_current (struct glyph_matrix *desired_matrix, struct glyph_matrix *current_matrix, int row) |
5f5c8ee5 GM |
2677 | { |
2678 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2679 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
59ea14cd | 2680 | bool mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2681 | |
2682 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2683 | between both rows, and does a structure assignment otherwise. */ | |
2684 | assign_row (current_row, desired_row); | |
2685 | ||
2686 | /* Enable current_row to mark it as valid. */ | |
2687 | current_row->enabled_p = 1; | |
e876ff42 | 2688 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2689 | |
2690 | /* If we are called on frame matrices, perform analogous operations | |
2691 | for window matrices. */ | |
2692 | if (frame_matrix_frame) | |
e69b0960 | 2693 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); |
5f5c8ee5 GM |
2694 | } |
2695 | ||
2696 | ||
2697 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2698 | W's frame which has been made current (by swapping pointers between | |
2699 | current and desired matrix). Perform analogous operations in the | |
2700 | matrices of leaf windows in the window tree rooted at W. */ | |
2701 | ||
2702 | static void | |
971de7fb | 2703 | mirror_make_current (struct window *w, int frame_row) |
5f5c8ee5 GM |
2704 | { |
2705 | while (w) | |
2706 | { | |
d3d50620 DA |
2707 | if (!NILP (w->hchild)) |
2708 | mirror_make_current (XWINDOW (w->hchild), frame_row); | |
2709 | else if (!NILP (w->vchild)) | |
2710 | mirror_make_current (XWINDOW (w->vchild), frame_row); | |
5f5c8ee5 GM |
2711 | else |
2712 | { | |
2713 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2714 | here because the checks performed in debug mode there | |
2715 | will not allow the conversion. */ | |
2716 | int row = frame_row - w->desired_matrix->matrix_y; | |
2717 | ||
2718 | /* If FRAME_ROW is within W, assign the desired row to the | |
2719 | current row (exchanging glyph pointers). */ | |
2720 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
2721 | { | |
2722 | struct glyph_row *current_row | |
2723 | = MATRIX_ROW (w->current_matrix, row); | |
2724 | struct glyph_row *desired_row | |
2725 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
2726 | |
2727 | if (desired_row->enabled_p) | |
2728 | assign_row (current_row, desired_row); | |
2729 | else | |
2730 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 | 2731 | current_row->enabled_p = 1; |
d009ae66 EZ |
2732 | |
2733 | /* Set the Y coordinate of the mode/header line's row. | |
2734 | It is needed in draw_row_with_mouse_face to find the | |
2735 | screen coordinates. (Window-based redisplay sets | |
2736 | this in update_window, but no one seems to do that | |
2737 | for frame-based redisplay.) */ | |
2738 | if (current_row->mode_line_p) | |
2739 | current_row->y = row; | |
5f5c8ee5 GM |
2740 | } |
2741 | } | |
177c0ea7 | 2742 | |
d3d50620 | 2743 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2744 | } |
2745 | } | |
2746 | ||
2747 | ||
2748 | /* Perform row dance after scrolling. We are working on the range of | |
2749 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
2750 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
2751 | row I in the range 0 <= I < NLINES, the index of the original line | |
2752 | to move to I. This index is relative to the row range, i.e. 0 <= | |
2753 | index < NLINES. RETAINED_P is a vector containing zero for each | |
2754 | row 0 <= I < NLINES which is empty. | |
2755 | ||
2756 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 2757 | |
5f5c8ee5 | 2758 | void |
6f704c76 DN |
2759 | mirrored_line_dance (struct glyph_matrix *matrix, int unchanged_at_top, int nlines, |
2760 | int *copy_from, char *retained_p) | |
5f5c8ee5 GM |
2761 | { |
2762 | /* A copy of original rows. */ | |
2763 | struct glyph_row *old_rows; | |
2764 | ||
2765 | /* Rows to assign to. */ | |
2766 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 2767 | |
5f5c8ee5 GM |
2768 | int i; |
2769 | ||
2770 | /* Make a copy of the original rows. */ | |
38182d90 | 2771 | old_rows = alloca (nlines * sizeof *old_rows); |
72af86bd | 2772 | memcpy (old_rows, new_rows, nlines * sizeof *old_rows); |
5f5c8ee5 GM |
2773 | |
2774 | /* Assign new rows, maybe clear lines. */ | |
2775 | for (i = 0; i < nlines; ++i) | |
2776 | { | |
59ea14cd | 2777 | bool enabled_before_p = new_rows[i].enabled_p; |
5f5c8ee5 | 2778 | |
a54e2c05 DA |
2779 | eassert (i + unchanged_at_top < matrix->nrows); |
2780 | eassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
5f5c8ee5 GM |
2781 | new_rows[i] = old_rows[copy_from[i]]; |
2782 | new_rows[i].enabled_p = enabled_before_p; | |
2783 | ||
2784 | /* RETAINED_P is zero for empty lines. */ | |
2785 | if (!retained_p[copy_from[i]]) | |
2786 | new_rows[i].enabled_p = 0; | |
2787 | } | |
2788 | ||
153a073c | 2789 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 | 2790 | if (frame_matrix_frame) |
e69b0960 | 2791 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), |
5f5c8ee5 GM |
2792 | unchanged_at_top, nlines, copy_from, retained_p); |
2793 | } | |
2794 | ||
2795 | ||
a13396c9 | 2796 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 2797 | the current frame matrix. */ |
a13396c9 GM |
2798 | |
2799 | static void | |
971de7fb | 2800 | sync_window_with_frame_matrix_rows (struct window *w) |
a13396c9 | 2801 | { |
d3d50620 | 2802 | struct frame *f = XFRAME (w->frame); |
a13396c9 | 2803 | struct glyph_row *window_row, *window_row_end, *frame_row; |
075c507b | 2804 | int left, right, x, width; |
a13396c9 | 2805 | |
5cb88111 | 2806 | /* Preconditions: W must be a leaf window on a tty frame. */ |
d3d50620 | 2807 | eassert (NILP (w->hchild) && NILP (w->vchild)); |
a54e2c05 | 2808 | eassert (!FRAME_WINDOW_P (f)); |
a13396c9 | 2809 | |
d3d50620 DA |
2810 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
2811 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
2812 | x = w->current_matrix->matrix_x; |
2813 | width = w->current_matrix->matrix_w; | |
2814 | ||
a13396c9 GM |
2815 | window_row = w->current_matrix->rows; |
2816 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 2817 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 2818 | |
5cb88111 | 2819 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 2820 | { |
5cb88111 GM |
2821 | window_row->glyphs[LEFT_MARGIN_AREA] |
2822 | = frame_row->glyphs[0] + x; | |
2823 | window_row->glyphs[TEXT_AREA] | |
2824 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
2825 | window_row->glyphs[LAST_AREA] | |
2826 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
2827 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
2828 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
2829 | } |
2830 | } | |
2831 | ||
2832 | ||
2833 | /* Return the window in the window tree rooted in W containing frame | |
2834 | row ROW. Value is null if none is found. */ | |
2835 | ||
09ad5a91 | 2836 | static struct window * |
971de7fb | 2837 | frame_row_to_window (struct window *w, int row) |
a13396c9 GM |
2838 | { |
2839 | struct window *found = NULL; | |
177c0ea7 | 2840 | |
a13396c9 GM |
2841 | while (w && !found) |
2842 | { | |
d3d50620 DA |
2843 | if (!NILP (w->hchild)) |
2844 | found = frame_row_to_window (XWINDOW (w->hchild), row); | |
2845 | else if (!NILP (w->vchild)) | |
2846 | found = frame_row_to_window (XWINDOW (w->vchild), row); | |
7df02016 KS |
2847 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
2848 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 2849 | found = w; |
177c0ea7 | 2850 | |
d3d50620 | 2851 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
a13396c9 GM |
2852 | } |
2853 | ||
2854 | return found; | |
2855 | } | |
2856 | ||
2857 | ||
5f5c8ee5 GM |
2858 | /* Perform a line dance in the window tree rooted at W, after |
2859 | scrolling a frame matrix in mirrored_line_dance. | |
2860 | ||
2861 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
2862 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
2863 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
2864 | I < NLINES, the index of the original line to move to I. This | |
2865 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
2866 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
2867 | which is empty. */ | |
2868 | ||
2869 | static void | |
971de7fb | 2870 | mirror_line_dance (struct window *w, int unchanged_at_top, int nlines, int *copy_from, char *retained_p) |
5f5c8ee5 GM |
2871 | { |
2872 | while (w) | |
2873 | { | |
d3d50620 DA |
2874 | if (!NILP (w->hchild)) |
2875 | mirror_line_dance (XWINDOW (w->hchild), unchanged_at_top, | |
5f5c8ee5 | 2876 | nlines, copy_from, retained_p); |
d3d50620 DA |
2877 | else if (!NILP (w->vchild)) |
2878 | mirror_line_dance (XWINDOW (w->vchild), unchanged_at_top, | |
5f5c8ee5 GM |
2879 | nlines, copy_from, retained_p); |
2880 | else | |
2881 | { | |
2882 | /* W is a leaf window, and we are working on its current | |
2883 | matrix m. */ | |
2884 | struct glyph_matrix *m = w->current_matrix; | |
59ea14cd PE |
2885 | int i; |
2886 | bool sync_p = 0; | |
5f5c8ee5 GM |
2887 | struct glyph_row *old_rows; |
2888 | ||
2889 | /* Make a copy of the original rows of matrix m. */ | |
38182d90 | 2890 | old_rows = alloca (m->nrows * sizeof *old_rows); |
72af86bd | 2891 | memcpy (old_rows, m->rows, m->nrows * sizeof *old_rows); |
5f5c8ee5 GM |
2892 | |
2893 | for (i = 0; i < nlines; ++i) | |
2894 | { | |
2895 | /* Frame relative line assigned to. */ | |
2896 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 2897 | |
5f5c8ee5 GM |
2898 | /* Frame relative line assigned. */ |
2899 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 2900 | |
5f5c8ee5 GM |
2901 | /* Window relative line assigned to. */ |
2902 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 2903 | |
5f5c8ee5 GM |
2904 | /* Window relative line assigned. */ |
2905 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 2906 | |
5f5c8ee5 | 2907 | /* Is assigned line inside window? */ |
59ea14cd | 2908 | bool from_inside_window_p |
5f5c8ee5 | 2909 | = window_from >= 0 && window_from < m->matrix_h; |
177c0ea7 | 2910 | |
a13396c9 | 2911 | /* Is assigned to line inside window? */ |
59ea14cd | 2912 | bool to_inside_window_p |
a13396c9 | 2913 | = window_to >= 0 && window_to < m->matrix_h; |
177c0ea7 | 2914 | |
a13396c9 | 2915 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 2916 | { |
5f5c8ee5 GM |
2917 | /* Do the assignment. The enabled_p flag is saved |
2918 | over the assignment because the old redisplay did | |
2919 | that. */ | |
59ea14cd | 2920 | bool enabled_before_p = m->rows[window_to].enabled_p; |
5f5c8ee5 GM |
2921 | m->rows[window_to] = old_rows[window_from]; |
2922 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 2923 | |
5f5c8ee5 GM |
2924 | /* If frame line is empty, window line is empty, too. */ |
2925 | if (!retained_p[copy_from[i]]) | |
2926 | m->rows[window_to].enabled_p = 0; | |
2927 | } | |
a13396c9 GM |
2928 | else if (to_inside_window_p) |
2929 | { | |
2930 | /* A copy between windows. This is an infrequent | |
2931 | case not worth optimizing. */ | |
d3d50620 | 2932 | struct frame *f = XFRAME (w->frame); |
a13396c9 GM |
2933 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
2934 | struct window *w2; | |
2935 | struct glyph_matrix *m2; | |
2936 | int m2_from; | |
2937 | ||
fe8b8401 | 2938 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
2939 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
2940 | -nw', FROM_FRAME sometimes has no associated window. | |
2941 | This check avoids a segfault if W2 is null. */ | |
2942 | if (w2) | |
2943 | { | |
2944 | m2 = w2->current_matrix; | |
2945 | m2_from = frame_from - m2->matrix_y; | |
2946 | copy_row_except_pointers (m->rows + window_to, | |
2947 | m2->rows + m2_from); | |
2948 | ||
2949 | /* If frame line is empty, window line is empty, too. */ | |
2950 | if (!retained_p[copy_from[i]]) | |
2951 | m->rows[window_to].enabled_p = 0; | |
2952 | } | |
a13396c9 GM |
2953 | sync_p = 1; |
2954 | } | |
2955 | else if (from_inside_window_p) | |
2956 | sync_p = 1; | |
5f5c8ee5 | 2957 | } |
a13396c9 GM |
2958 | |
2959 | /* If there was a copy between windows, make sure glyph | |
2960 | pointers are in sync with the frame matrix. */ | |
2961 | if (sync_p) | |
2962 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 2963 | |
5f5c8ee5 GM |
2964 | /* Check that no pointers are lost. */ |
2965 | CHECK_MATRIX (m); | |
2966 | } | |
2967 | ||
2968 | /* Next window on same level. */ | |
d3d50620 | 2969 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2970 | } |
2971 | } | |
2972 | ||
2973 | ||
e509cfa6 | 2974 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
2975 | |
2976 | /* Check that window and frame matrices agree about their | |
2977 | understanding where glyphs of the rows are to find. For each | |
2978 | window in the window tree rooted at W, check that rows in the | |
2979 | matrices of leaf window agree with their frame matrices about | |
2980 | glyph pointers. */ | |
2981 | ||
85fece3e | 2982 | static void |
59fc5cf9 | 2983 | check_window_matrix_pointers (struct window *w) |
5f5c8ee5 GM |
2984 | { |
2985 | while (w) | |
2986 | { | |
d3d50620 DA |
2987 | if (!NILP (w->hchild)) |
2988 | check_window_matrix_pointers (XWINDOW (w->hchild)); | |
2989 | else if (!NILP (w->vchild)) | |
2990 | check_window_matrix_pointers (XWINDOW (w->vchild)); | |
5f5c8ee5 | 2991 | else |
60a8948a | 2992 | { |
d3d50620 | 2993 | struct frame *f = XFRAME (w->frame); |
5f5c8ee5 GM |
2994 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); |
2995 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 2996 | } |
177c0ea7 | 2997 | |
d3d50620 | 2998 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2999 | } |
3000 | } | |
3001 | ||
3002 | ||
3003 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
3004 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
3005 | each row in WINDOW_MATRIX check that it's a slice of the | |
3006 | corresponding frame row. If it isn't, abort. */ | |
3007 | ||
3008 | static void | |
59fc5cf9 AS |
3009 | check_matrix_pointers (struct glyph_matrix *window_matrix, |
3010 | struct glyph_matrix *frame_matrix) | |
5f5c8ee5 GM |
3011 | { |
3012 | /* Row number in WINDOW_MATRIX. */ | |
3013 | int i = 0; | |
3014 | ||
3015 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
3016 | int j = window_matrix->matrix_y; | |
3017 | ||
177c0ea7 | 3018 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
3019 | slice of the row in the frame matrix. If it isn't we didn't |
3020 | mirror an operation on the frame matrix correctly. */ | |
3021 | while (i < window_matrix->nrows) | |
3022 | { | |
3023 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
3024 | frame_matrix->rows + j)) | |
1088b922 | 3025 | emacs_abort (); |
5f5c8ee5 GM |
3026 | ++i, ++j; |
3027 | } | |
3028 | } | |
3029 | ||
e509cfa6 | 3030 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
3031 | |
3032 | ||
3033 | \f | |
3034 | /********************************************************************** | |
3035 | VPOS and HPOS translations | |
3036 | **********************************************************************/ | |
3037 | ||
e509cfa6 | 3038 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
3039 | |
3040 | /* Translate vertical position VPOS which is relative to window W to a | |
3041 | vertical position relative to W's frame. */ | |
3042 | ||
3043 | static int | |
59fc5cf9 | 3044 | window_to_frame_vpos (struct window *w, int vpos) |
5f5c8ee5 | 3045 | { |
d3d50620 | 3046 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
a54e2c05 | 3047 | eassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); |
7df02016 | 3048 | vpos += WINDOW_TOP_EDGE_LINE (w); |
d3d50620 | 3049 | eassert (vpos >= 0 && vpos <= FRAME_LINES (XFRAME (w->frame))); |
5f5c8ee5 GM |
3050 | return vpos; |
3051 | } | |
3052 | ||
3053 | ||
3054 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 3055 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
3056 | |
3057 | static int | |
59fc5cf9 | 3058 | window_to_frame_hpos (struct window *w, int hpos) |
5f5c8ee5 | 3059 | { |
d3d50620 | 3060 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 3061 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
3062 | return hpos; |
3063 | } | |
177c0ea7 | 3064 | |
5f5c8ee5 GM |
3065 | #endif /* GLYPH_DEBUG */ |
3066 | ||
3067 | ||
3068 | \f | |
3069 | /********************************************************************** | |
3070 | Redrawing Frames | |
3071 | **********************************************************************/ | |
3072 | ||
a7ca3326 | 3073 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
7ee72033 | 3074 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. */) |
5842a27b | 3075 | (Lisp_Object frame) |
5f5c8ee5 GM |
3076 | { |
3077 | struct frame *f; | |
3078 | ||
b7826503 | 3079 | CHECK_LIVE_FRAME (frame); |
5f5c8ee5 GM |
3080 | f = XFRAME (frame); |
3081 | ||
3082 | /* Ignore redraw requests, if frame has no glyphs yet. | |
3083 | (Implementation note: It still has to be checked why we are | |
3084 | called so early here). */ | |
3085 | if (!glyphs_initialized_initially_p) | |
3086 | return Qnil; | |
3087 | ||
3088 | update_begin (f); | |
3224dac1 | 3089 | #ifdef MSDOS |
f2adda5e | 3090 | if (FRAME_MSDOS_P (f)) |
79d39b69 | 3091 | FRAME_TERMINAL (f)->set_terminal_modes_hook (FRAME_TERMINAL (f)); |
3224dac1 | 3092 | #endif |
385ed61f | 3093 | clear_frame (f); |
5f5c8ee5 GM |
3094 | clear_current_matrices (f); |
3095 | update_end (f); | |
daf01701 | 3096 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3097 | fflush (FRAME_TTY (f)->output); |
5f5c8ee5 GM |
3098 | windows_or_buffers_changed++; |
3099 | /* Mark all windows as inaccurate, so that every window will have | |
3100 | its redisplay done. */ | |
3101 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
3102 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
3103 | f->garbaged = 0; | |
3104 | return Qnil; | |
3105 | } | |
3106 | ||
3107 | ||
3108 | /* Redraw frame F. This is nothing more than a call to the Lisp | |
3109 | function redraw-frame. */ | |
3110 | ||
3111 | void | |
971de7fb | 3112 | redraw_frame (struct frame *f) |
5f5c8ee5 GM |
3113 | { |
3114 | Lisp_Object frame; | |
3115 | XSETFRAME (frame, f); | |
3116 | Fredraw_frame (frame); | |
3117 | } | |
3118 | ||
3119 | ||
3120 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
7ee72033 | 3121 | doc: /* Clear and redisplay all visible frames. */) |
5842a27b | 3122 | (void) |
5f5c8ee5 GM |
3123 | { |
3124 | Lisp_Object tail, frame; | |
3125 | ||
3126 | FOR_EACH_FRAME (tail, frame) | |
3127 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
3128 | Fredraw_frame (frame); | |
3129 | ||
3130 | return Qnil; | |
3131 | } | |
3132 | ||
3133 | ||
5f5c8ee5 | 3134 | \f |
5f5c8ee5 GM |
3135 | /*********************************************************************** |
3136 | Frame Update | |
3137 | ***********************************************************************/ | |
4588ec20 | 3138 | |
5f5c8ee5 | 3139 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 3140 | |
59ea14cd PE |
3141 | If FORCE_P, don't let redisplay be stopped by detecting pending input. |
3142 | If INHIBIT_HAIRY_ID_P, don't try scrolling. | |
177c0ea7 | 3143 | |
59ea14cd | 3144 | Value is true if redisplay was stopped due to pending input. */ |
4588ec20 | 3145 | |
59ea14cd PE |
3146 | bool |
3147 | update_frame (struct frame *f, bool force_p, bool inhibit_hairy_id_p) | |
5f5c8ee5 | 3148 | { |
59ea14cd PE |
3149 | /* True means display has been paused because of pending input. */ |
3150 | bool paused_p; | |
e69b0960 | 3151 | struct window *root_window = XWINDOW (f->root_window); |
5f5c8ee5 | 3152 | |
a2130dbb KS |
3153 | if (redisplay_dont_pause) |
3154 | force_p = 1; | |
a2130dbb KS |
3155 | else if (NILP (Vredisplay_preemption_period)) |
3156 | force_p = 1; | |
3157 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b | 3158 | { |
d012c62b | 3159 | double p = XFLOATINT (Vredisplay_preemption_period); |
d012c62b | 3160 | |
993d4ab6 KS |
3161 | if (detect_input_pending_ignore_squeezables ()) |
3162 | { | |
3163 | paused_p = 1; | |
3164 | goto do_pause; | |
3165 | } | |
3166 | ||
d35af63c | 3167 | preemption_period = EMACS_TIME_FROM_DOUBLE (p); |
e9a9ae03 PE |
3168 | preemption_next_check = add_emacs_time (current_emacs_time (), |
3169 | preemption_period); | |
d012c62b | 3170 | } |
d012c62b | 3171 | |
5f5c8ee5 | 3172 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3173 | { |
5f5c8ee5 GM |
3174 | /* We are working on window matrix basis. All windows whose |
3175 | flag must_be_updated_p is set have to be updated. */ | |
3176 | ||
3177 | /* Record that we are not working on frame matrices. */ | |
3178 | set_frame_matrix_frame (NULL); | |
3179 | ||
3180 | /* Update all windows in the window tree of F, maybe stopping | |
3181 | when pending input is detected. */ | |
3182 | update_begin (f); | |
3183 | ||
3184 | /* Update the menu bar on X frames that don't have toolkit | |
3185 | support. */ | |
e69b0960 DA |
3186 | if (WINDOWP (f->menu_bar_window)) |
3187 | update_window (XWINDOW (f->menu_bar_window), 1); | |
5f5c8ee5 GM |
3188 | |
3189 | /* Update the tool-bar window, if present. */ | |
e69b0960 | 3190 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3191 | { |
e69b0960 | 3192 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3193 | |
3194 | /* Update tool-bar window. */ | |
3195 | if (w->must_be_updated_p) | |
4588ec20 | 3196 | { |
153a073c PJ |
3197 | Lisp_Object tem; |
3198 | ||
5f5c8ee5 GM |
3199 | update_window (w, 1); |
3200 | w->must_be_updated_p = 0; | |
3201 | ||
3202 | /* Swap tool-bar strings. We swap because we want to | |
3203 | reuse strings. */ | |
e69b0960 | 3204 | tem = f->current_tool_bar_string; |
f00af5b1 PE |
3205 | fset_current_tool_bar_string (f, f->desired_tool_bar_string); |
3206 | fset_desired_tool_bar_string (f, tem); | |
4588ec20 JB |
3207 | } |
3208 | } | |
177c0ea7 | 3209 | |
5f5c8ee5 GM |
3210 | |
3211 | /* Update windows. */ | |
3212 | paused_p = update_window_tree (root_window, force_p); | |
3213 | update_end (f); | |
177c0ea7 | 3214 | |
6b61353c | 3215 | /* This flush is a performance bottleneck under X, |
e581a466 | 3216 | and it doesn't seem to be necessary anyway (in general). |
6b61353c | 3217 | It is necessary when resizing the window with the mouse, or |
e581a466 | 3218 | at least the fringes are not redrawn in a timely manner. ++kfs */ |
6b61353c | 3219 | if (f->force_flush_display_p) |
e581a466 KL |
3220 | { |
3221 | FRAME_RIF (f)->flush_display (f); | |
3222 | f->force_flush_display_p = 0; | |
3223 | } | |
4588ec20 | 3224 | } |
5f5c8ee5 GM |
3225 | else |
3226 | { | |
3227 | /* We are working on frame matrix basis. Set the frame on whose | |
3228 | frame matrix we operate. */ | |
3229 | set_frame_matrix_frame (f); | |
3230 | ||
868dd24b | 3231 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3232 | build_frame_matrix (f); |
177c0ea7 | 3233 | |
868dd24b GM |
3234 | /* Update the display */ |
3235 | update_begin (f); | |
5f5c8ee5 | 3236 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3237 | update_end (f); |
3238 | ||
7d2f1216 | 3239 | if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f)) |
3224dac1 | 3240 | { |
0b0d3e0b KL |
3241 | if (FRAME_TTY (f)->termscript) |
3242 | fflush (FRAME_TTY (f)->termscript); | |
7d2f1216 EZ |
3243 | if (FRAME_TERMCAP_P (f)) |
3244 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3245 | } |
868dd24b | 3246 | |
5f5c8ee5 | 3247 | /* Check window matrices for lost pointers. */ |
e509cfa6 | 3248 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
3249 | check_window_matrix_pointers (root_window); |
3250 | add_frame_display_history (f, paused_p); | |
3251 | #endif | |
5f5c8ee5 GM |
3252 | } |
3253 | ||
993d4ab6 | 3254 | do_pause: |
5f5c8ee5 GM |
3255 | /* Reset flags indicating that a window should be updated. */ |
3256 | set_window_update_flags (root_window, 0); | |
177c0ea7 | 3257 | |
868dd24b | 3258 | display_completed = !paused_p; |
5f5c8ee5 | 3259 | return paused_p; |
4588ec20 | 3260 | } |
5f5c8ee5 GM |
3261 | |
3262 | ||
4588ec20 | 3263 | \f |
5f5c8ee5 GM |
3264 | /************************************************************************ |
3265 | Window-based updates | |
3266 | ************************************************************************/ | |
3267 | ||
59ea14cd PE |
3268 | /* Perform updates in window tree rooted at W. |
3269 | If FORCE_P, don't stop updating if input is pending. */ | |
5f5c8ee5 | 3270 | |
59ea14cd PE |
3271 | static bool |
3272 | update_window_tree (struct window *w, bool force_p) | |
5f5c8ee5 | 3273 | { |
59ea14cd | 3274 | bool paused_p = 0; |
177c0ea7 | 3275 | |
5f5c8ee5 GM |
3276 | while (w && !paused_p) |
3277 | { | |
d3d50620 DA |
3278 | if (!NILP (w->hchild)) |
3279 | paused_p |= update_window_tree (XWINDOW (w->hchild), force_p); | |
3280 | else if (!NILP (w->vchild)) | |
3281 | paused_p |= update_window_tree (XWINDOW (w->vchild), force_p); | |
5f5c8ee5 GM |
3282 | else if (w->must_be_updated_p) |
3283 | paused_p |= update_window (w, force_p); | |
3284 | ||
d3d50620 | 3285 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
3286 | } |
3287 | ||
3288 | return paused_p; | |
3289 | } | |
3290 | ||
3291 | ||
59ea14cd PE |
3292 | /* Update window W if its flag must_be_updated_p is set. |
3293 | If FORCE_P, don't stop updating if input is pending. */ | |
5f5c8ee5 GM |
3294 | |
3295 | void | |
59ea14cd | 3296 | update_single_window (struct window *w, bool force_p) |
5f5c8ee5 GM |
3297 | { |
3298 | if (w->must_be_updated_p) | |
3299 | { | |
3300 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
3301 | ||
3302 | /* Record that this is not a frame-based redisplay. */ | |
3303 | set_frame_matrix_frame (NULL); | |
3304 | ||
a2130dbb KS |
3305 | if (redisplay_dont_pause) |
3306 | force_p = 1; | |
a2130dbb KS |
3307 | else if (NILP (Vredisplay_preemption_period)) |
3308 | force_p = 1; | |
3309 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b | 3310 | { |
d012c62b | 3311 | double p = XFLOATINT (Vredisplay_preemption_period); |
d35af63c | 3312 | preemption_period = EMACS_TIME_FROM_DOUBLE (p); |
e9a9ae03 PE |
3313 | preemption_next_check = add_emacs_time (current_emacs_time (), |
3314 | preemption_period); | |
d012c62b | 3315 | } |
d012c62b | 3316 | |
5f5c8ee5 GM |
3317 | /* Update W. */ |
3318 | update_begin (f); | |
3319 | update_window (w, force_p); | |
3320 | update_end (f); | |
4588ec20 | 3321 | |
5f5c8ee5 GM |
3322 | /* Reset flag in W. */ |
3323 | w->must_be_updated_p = 0; | |
3324 | } | |
3325 | } | |
4588ec20 | 3326 | |
93e023fc | 3327 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 3328 | |
408f5064 GM |
3329 | /* Redraw lines from the current matrix of window W that are |
3330 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
3331 | ||
3332 | static void | |
971de7fb | 3333 | redraw_overlapped_rows (struct window *w, int yb) |
408f5064 | 3334 | { |
d8ee7803 | 3335 | int i; |
fa971ac3 | 3336 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3fc809e2 | 3337 | |
408f5064 GM |
3338 | /* If rows overlapping others have been changed, the rows being |
3339 | overlapped have to be redrawn. This won't draw lines that have | |
3340 | already been drawn in update_window_line because overlapped_p in | |
3341 | desired rows is 0, so after row assignment overlapped_p in | |
3342 | current rows is 0. */ | |
3343 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
3344 | { | |
e876ff42 | 3345 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
3346 | |
3347 | if (!row->enabled_p) | |
3348 | break; | |
3349 | else if (row->mode_line_p) | |
3350 | continue; | |
177c0ea7 | 3351 | |
408f5064 GM |
3352 | if (row->overlapped_p) |
3353 | { | |
3354 | enum glyph_row_area area; | |
177c0ea7 | 3355 | |
408f5064 GM |
3356 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
3357 | { | |
3358 | updated_row = row; | |
3359 | updated_area = area; | |
fa971ac3 KL |
3360 | FRAME_RIF (f)->cursor_to (i, 0, row->y, |
3361 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 3362 | if (row->used[area]) |
fa971ac3 KL |
3363 | FRAME_RIF (f)->write_glyphs (row->glyphs[area], |
3364 | row->used[area]); | |
3365 | FRAME_RIF (f)->clear_end_of_line (-1); | |
408f5064 | 3366 | } |
177c0ea7 | 3367 | |
408f5064 GM |
3368 | row->overlapped_p = 0; |
3369 | } | |
3370 | ||
e876ff42 | 3371 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
3372 | break; |
3373 | } | |
3374 | } | |
3375 | ||
3376 | ||
3377 | /* Redraw lines from the current matrix of window W that overlap | |
3378 | others. YB is bottom-most y-position in W. */ | |
3379 | ||
3380 | static void | |
971de7fb | 3381 | redraw_overlapping_rows (struct window *w, int yb) |
408f5064 GM |
3382 | { |
3383 | int i, bottom_y; | |
3384 | struct glyph_row *row; | |
fa971ac3 | 3385 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
3fc809e2 | 3386 | |
408f5064 GM |
3387 | for (i = 0; i < w->current_matrix->nrows; ++i) |
3388 | { | |
3389 | row = w->current_matrix->rows + i; | |
3390 | ||
3391 | if (!row->enabled_p) | |
3392 | break; | |
3393 | else if (row->mode_line_p) | |
3394 | continue; | |
177c0ea7 | 3395 | |
408f5064 GM |
3396 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
3397 | ||
b4b2c2ca | 3398 | if (row->overlapping_p) |
408f5064 | 3399 | { |
41124e06 YM |
3400 | int overlaps = 0; |
3401 | ||
b4b2c2ca | 3402 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) && i > 0 |
41124e06 YM |
3403 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) |
3404 | overlaps |= OVERLAPS_PRED; | |
b4b2c2ca | 3405 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) && bottom_y < yb |
41124e06 YM |
3406 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) |
3407 | overlaps |= OVERLAPS_SUCC; | |
3408 | ||
3409 | if (overlaps) | |
3410 | { | |
3411 | if (row->used[LEFT_MARGIN_AREA]) | |
3412 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
3413 | ||
3414 | if (row->used[TEXT_AREA]) | |
3415 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
3416 | ||
3417 | if (row->used[RIGHT_MARGIN_AREA]) | |
3418 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
3419 | ||
c5e87d10 | 3420 | /* Record in neighbor rows that ROW overwrites part of |
41124e06 YM |
3421 | their display. */ |
3422 | if (overlaps & OVERLAPS_PRED) | |
3423 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
3424 | if (overlaps & OVERLAPS_SUCC) | |
3425 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
3426 | } | |
408f5064 GM |
3427 | } |
3428 | ||
3429 | if (bottom_y >= yb) | |
3430 | break; | |
3431 | } | |
3432 | } | |
3433 | ||
93e023fc KS |
3434 | #endif /* HAVE_WINDOW_SYSTEM */ |
3435 | ||
408f5064 | 3436 | |
09ad5a91 | 3437 | #if defined GLYPH_DEBUG && 0 |
93962bfa GM |
3438 | |
3439 | /* Check that no row in the current matrix of window W is enabled | |
3440 | which is below what's displayed in the window. */ | |
3441 | ||
09ad5a91 | 3442 | static void |
971de7fb | 3443 | check_current_matrix_flags (struct window *w) |
93962bfa | 3444 | { |
59ea14cd | 3445 | bool last_seen_p = 0; |
93962bfa GM |
3446 | int i, yb = window_text_bottom_y (w); |
3447 | ||
3448 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
3449 | { | |
3450 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
3451 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3452 | last_seen_p = 1; | |
3453 | else if (last_seen_p && row->enabled_p) | |
1088b922 | 3454 | emacs_abort (); |
93962bfa GM |
3455 | } |
3456 | } | |
3457 | ||
3458 | #endif /* GLYPH_DEBUG */ | |
3459 | ||
3460 | ||
59ea14cd PE |
3461 | /* Update display of window W. |
3462 | If FORCE_P, don't stop updating when input is pending. */ | |
5f5c8ee5 | 3463 | |
59ea14cd PE |
3464 | static bool |
3465 | update_window (struct window *w, bool force_p) | |
4588ec20 | 3466 | { |
5f5c8ee5 | 3467 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
59ea14cd | 3468 | bool paused_p; |
d012c62b | 3469 | #if !PERIODIC_PREEMPTION_CHECKING |
5f5c8ee5 | 3470 | int preempt_count = baud_rate / 2400 + 1; |
d012c62b | 3471 | #endif |
597cfb3f | 3472 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
e509cfa6 | 3473 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 3474 | /* Check that W's frame doesn't have glyph matrices. */ |
a54e2c05 | 3475 | eassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 3476 | #endif |
5f5c8ee5 GM |
3477 | |
3478 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb KS |
3479 | #if !PERIODIC_PREEMPTION_CHECKING |
3480 | if (!force_p) | |
a2d5fca0 | 3481 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3482 | #endif |
4588ec20 | 3483 | |
5f5c8ee5 GM |
3484 | /* If forced to complete the update, or if no input is pending, do |
3485 | the update. */ | |
8fd9a666 | 3486 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 3487 | { |
5f5c8ee5 GM |
3488 | struct glyph_row *row, *end; |
3489 | struct glyph_row *mode_line_row; | |
56974e03 | 3490 | struct glyph_row *header_line_row; |
59ea14cd PE |
3491 | int yb; |
3492 | bool changed_p = 0, mouse_face_overwritten_p = 0; | |
0bc32927 PE |
3493 | #if ! PERIODIC_PREEMPTION_CHECKING |
3494 | int n_updated = 0; | |
3495 | #endif | |
5f5c8ee5 GM |
3496 | |
3497 | rif->update_window_begin_hook (w); | |
3498 | yb = window_text_bottom_y (w); | |
5f5c8ee5 GM |
3499 | row = desired_matrix->rows; |
3500 | end = row + desired_matrix->nrows - 1; | |
177c0ea7 | 3501 | |
394305db EZ |
3502 | /* Take note of the header line, if there is one. We will |
3503 | update it below, after updating all of the window's lines. */ | |
5f5c8ee5 | 3504 | if (row->mode_line_p) |
56974e03 GM |
3505 | { |
3506 | header_line_row = row; | |
3507 | ++row; | |
3508 | } | |
3509 | else | |
3510 | header_line_row = NULL; | |
5f5c8ee5 GM |
3511 | |
3512 | /* Update the mode line, if necessary. */ | |
3513 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
3514 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
3515 | { | |
3516 | mode_line_row->y = yb; | |
3517 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
3518 | desired_matrix), |
3519 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3520 | } |
3521 | ||
3522 | /* Find first enabled row. Optimizations in redisplay_internal | |
3523 | may lead to an update with only one row enabled. There may | |
3524 | be also completely empty matrices. */ | |
3525 | while (row < end && !row->enabled_p) | |
3526 | ++row; | |
177c0ea7 | 3527 | |
bfdcafe1 | 3528 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 3529 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
3530 | { |
3531 | int rc = scrolling_window (w, header_line_row != NULL); | |
3532 | if (rc < 0) | |
3533 | { | |
3534 | /* All rows were found to be equal. */ | |
3535 | paused_p = 0; | |
3536 | goto set_cursor; | |
3537 | } | |
3538 | else if (rc > 0) | |
6b61353c KH |
3539 | { |
3540 | /* We've scrolled the display. */ | |
3541 | force_p = 1; | |
3542 | changed_p = 1; | |
3543 | } | |
5f5c8ee5 GM |
3544 | } |
3545 | ||
3546 | /* Update the rest of the lines. */ | |
0bc32927 | 3547 | for (; row < end && (force_p || !input_pending); ++row) |
394305db EZ |
3548 | /* scrolling_window resets the enabled_p flag of the rows it |
3549 | reuses from current_matrix. */ | |
b7412313 | 3550 | if (row->enabled_p) |
5f5c8ee5 GM |
3551 | { |
3552 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
3553 | int i; | |
177c0ea7 | 3554 | |
153a073c | 3555 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
3556 | detect_input_pending. If it's done too often, |
3557 | scrolling large windows with repeated scroll-up | |
3558 | commands will too quickly pause redisplay. */ | |
d012c62b KS |
3559 | #if PERIODIC_PREEMPTION_CHECKING |
3560 | if (!force_p) | |
3561 | { | |
e9a9ae03 | 3562 | EMACS_TIME tm = current_emacs_time (); |
d35af63c | 3563 | if (EMACS_TIME_LT (preemption_next_check, tm)) |
d012c62b | 3564 | { |
e9a9ae03 PE |
3565 | preemption_next_check = add_emacs_time (tm, |
3566 | preemption_period); | |
993d4ab6 KS |
3567 | if (detect_input_pending_ignore_squeezables ()) |
3568 | break; | |
d012c62b KS |
3569 | } |
3570 | } | |
3571 | #else | |
e87b8809 | 3572 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 3573 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3574 | #endif |
e876ff42 GM |
3575 | changed_p |= update_window_line (w, vpos, |
3576 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3577 | |
3578 | /* Mark all rows below the last visible one in the current | |
3579 | matrix as invalid. This is necessary because of | |
3580 | variable line heights. Consider the case of three | |
3581 | successive redisplays, where the first displays 5 | |
3582 | lines, the second 3 lines, and the third 5 lines again. | |
3583 | If the second redisplay wouldn't mark rows in the | |
3584 | current matrix invalid, the third redisplay might be | |
3585 | tempted to optimize redisplay based on lines displayed | |
3586 | in the first redisplay. */ | |
3587 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3588 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
3589 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
3590 | } | |
3591 | ||
3592 | /* Was display preempted? */ | |
3593 | paused_p = row < end; | |
177c0ea7 | 3594 | |
56974e03 | 3595 | set_cursor: |
177c0ea7 | 3596 | |
6b61353c KH |
3597 | /* Update the header line after scrolling because a new header |
3598 | line would otherwise overwrite lines at the top of the window | |
3599 | that can be scrolled. */ | |
3600 | if (header_line_row && header_line_row->enabled_p) | |
3601 | { | |
3602 | header_line_row->y = 0; | |
3603 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
6b61353c KH |
3604 | } |
3605 | ||
153a073c | 3606 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
3607 | if (!paused_p && !w->pseudo_window_p) |
3608 | { | |
93e023fc | 3609 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
3610 | if (changed_p && rif->fix_overlapping_area) |
3611 | { | |
3612 | redraw_overlapped_rows (w, yb); | |
3613 | redraw_overlapping_rows (w, yb); | |
3614 | } | |
93e023fc | 3615 | #endif |
177c0ea7 | 3616 | |
5f5c8ee5 GM |
3617 | /* Make cursor visible at cursor position of W. */ |
3618 | set_window_cursor_after_update (w); | |
3619 | ||
e876ff42 GM |
3620 | #if 0 /* Check that current matrix invariants are satisfied. This is |
3621 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
3622 | IF_DEBUG (check_matrix_invariants (w)); |
3623 | #endif | |
4588ec20 | 3624 | } |
5f5c8ee5 | 3625 | |
e509cfa6 | 3626 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
3627 | /* Remember the redisplay method used to display the matrix. */ |
3628 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
3629 | #endif | |
408f5064 | 3630 | |
6b61353c KH |
3631 | #ifdef HAVE_WINDOW_SYSTEM |
3632 | update_window_fringes (w, 0); | |
3633 | #endif | |
3634 | ||
56974e03 GM |
3635 | /* End the update of window W. Don't set the cursor if we |
3636 | paused updating the display because in this case, | |
3637 | set_window_cursor_after_update hasn't been called, and | |
3638 | output_cursor doesn't contain the cursor location. */ | |
3639 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); | |
4588ec20 | 3640 | } |
5f5c8ee5 GM |
3641 | else |
3642 | paused_p = 1; | |
3643 | ||
e509cfa6 | 3644 | #ifdef GLYPH_DEBUG |
0cffd9d8 | 3645 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
3646 | add_window_display_history (w, w->current_matrix->method, paused_p); |
3647 | #endif | |
177c0ea7 | 3648 | |
5f5c8ee5 | 3649 | clear_glyph_matrix (desired_matrix); |
408f5064 | 3650 | |
5f5c8ee5 | 3651 | return paused_p; |
4588ec20 JB |
3652 | } |
3653 | ||
b64b3980 | 3654 | |
5f5c8ee5 GM |
3655 | /* Update the display of area AREA in window W, row number VPOS. |
3656 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
3657 | ||
3658 | static void | |
971de7fb | 3659 | update_marginal_area (struct window *w, int area, int vpos) |
b64b3980 | 3660 | { |
5f5c8ee5 | 3661 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 3662 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
3663 | |
3664 | /* Let functions in xterm.c know what area subsequent X positions | |
3665 | will be relative to. */ | |
3666 | updated_area = area; | |
3667 | ||
3668 | /* Set cursor to start of glyphs, write them, and clear to the end | |
3669 | of the area. I don't think that something more sophisticated is | |
3670 | necessary here, since marginal areas will not be the default. */ | |
3671 | rif->cursor_to (vpos, 0, desired_row->y, 0); | |
3672 | if (desired_row->used[area]) | |
3673 | rif->write_glyphs (desired_row->glyphs[area], desired_row->used[area]); | |
3674 | rif->clear_end_of_line (-1); | |
b64b3980 | 3675 | } |
23b0200c | 3676 | |
352f1545 | 3677 | |
408f5064 | 3678 | /* Update the display of the text area of row VPOS in window W. |
59ea14cd | 3679 | Value is true if display has changed. */ |
5f5c8ee5 | 3680 | |
59ea14cd | 3681 | static bool |
971de7fb | 3682 | update_text_area (struct window *w, int vpos) |
23b0200c | 3683 | { |
5f5c8ee5 GM |
3684 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
3685 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3686 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
59ea14cd | 3687 | bool changed_p = 0; |
5f5c8ee5 GM |
3688 | |
3689 | /* Let functions in xterm.c know what area subsequent X positions | |
3690 | will be relative to. */ | |
3691 | updated_area = TEXT_AREA; | |
177c0ea7 | 3692 | |
5f5c8ee5 GM |
3693 | /* If rows are at different X or Y, or rows have different height, |
3694 | or the current row is marked invalid, write the entire line. */ | |
3695 | if (!current_row->enabled_p | |
3696 | || desired_row->y != current_row->y | |
3697 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
3698 | || desired_row->phys_ascent != current_row->phys_ascent |
3699 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 3700 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 3701 | || current_row->overlapped_p |
fee8b690 CY |
3702 | /* This next line is necessary for correctly redrawing |
3703 | mouse-face areas after scrolling and other operations. | |
3704 | However, it causes excessive flickering when mouse is moved | |
3705 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
3706 | line doesn't seem to hurt anything. -- cyd. |
3707 | But it is still needed for the header line. -- kfs. */ | |
3708 | || (current_row->mouse_face_p | |
3709 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
3710 | || current_row->x != desired_row->x) |
3711 | { | |
3712 | rif->cursor_to (vpos, 0, desired_row->y, desired_row->x); | |
177c0ea7 | 3713 | |
5f5c8ee5 GM |
3714 | if (desired_row->used[TEXT_AREA]) |
3715 | rif->write_glyphs (desired_row->glyphs[TEXT_AREA], | |
3716 | desired_row->used[TEXT_AREA]); | |
177c0ea7 | 3717 | |
5f5c8ee5 GM |
3718 | /* Clear to end of window. */ |
3719 | rif->clear_end_of_line (-1); | |
408f5064 | 3720 | changed_p = 1; |
60f2f3f1 GM |
3721 | |
3722 | /* This erases the cursor. We do this here because | |
3723 | notice_overwritten_cursor cannot easily check this, which | |
3724 | might indicate that the whole functionality of | |
3725 | notice_overwritten_cursor would better be implemented here. | |
3726 | On the other hand, we need notice_overwritten_cursor as long | |
3727 | as mouse highlighting is done asynchronously outside of | |
3728 | redisplay. */ | |
3729 | if (vpos == w->phys_cursor.vpos) | |
3730 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
3731 | } |
3732 | else | |
3733 | { | |
3734 | int stop, i, x; | |
3735 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
3736 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
59ea14cd | 3737 | bool overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 3738 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
59ea14cd | 3739 | bool abort_skipping = 0; |
5f5c8ee5 | 3740 | |
78897758 YM |
3741 | /* If the desired row extends its face to the text area end, and |
3742 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
3743 | make sure we write at least one glyph, so that the face |
3744 | extension actually takes place. */ | |
78897758 YM |
3745 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
3746 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
3747 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
3748 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 3749 | --desired_stop_pos; |
177c0ea7 | 3750 | |
5f5c8ee5 GM |
3751 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
3752 | i = 0; | |
3753 | x = desired_row->x; | |
8399f8a0 GM |
3754 | |
3755 | /* Loop over glyphs that current and desired row may have | |
3756 | in common. */ | |
5f5c8ee5 | 3757 | while (i < stop) |
352f1545 | 3758 | { |
59ea14cd | 3759 | bool can_skip_p = !abort_skipping; |
177c0ea7 | 3760 | |
5f5c8ee5 | 3761 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
3762 | don't have to be written. We can't skip if the last |
3763 | current glyph overlaps the glyph to its right. For | |
3764 | example, consider a current row of `if ' with the `f' in | |
3765 | Courier bold so that it overlaps the ` ' to its right. | |
3766 | If the desired row is ` ', we would skip over the space | |
3767 | after the `if' and there would remain a pixel from the | |
3768 | `f' on the screen. */ | |
3769 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 3770 | { |
e47306e6 GM |
3771 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
3772 | int left, right; | |
177c0ea7 | 3773 | |
d3d50620 | 3774 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
e47306e6 | 3775 | &left, &right); |
91d227d9 | 3776 | can_skip_p = (right == 0 && !abort_skipping); |
352f1545 | 3777 | } |
177c0ea7 | 3778 | |
6d950f4c | 3779 | if (can_skip_p) |
352f1545 | 3780 | { |
91d227d9 CY |
3781 | int start_hpos = i; |
3782 | ||
6d950f4c GM |
3783 | while (i < stop |
3784 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
3785 | { | |
3786 | x += desired_glyph->pixel_width; | |
3787 | ++desired_glyph, ++current_glyph, ++i; | |
3788 | } | |
3789 | ||
3790 | /* Consider the case that the current row contains "xxx | |
3791 | ppp ggg" in italic Courier font, and the desired row | |
3792 | is "xxx ggg". The character `p' has lbearing, `g' | |
3793 | has not. The loop above will stop in front of the | |
3794 | first `p' in the current row. If we would start | |
3795 | writing glyphs there, we wouldn't erase the lbearing | |
3796 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 3797 | taken care of by draw_glyphs. */ |
6d950f4c GM |
3798 | if (overlapping_glyphs_p |
3799 | && i > 0 | |
3800 | && i < current_row->used[TEXT_AREA] | |
3801 | && (current_row->used[TEXT_AREA] | |
3802 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 3803 | { |
6d950f4c | 3804 | int left, right; |
177c0ea7 | 3805 | |
3a45383a | 3806 | rif->get_glyph_overhangs (current_glyph, |
d3d50620 | 3807 | XFRAME (w->frame), |
6d950f4c GM |
3808 | &left, &right); |
3809 | while (left > 0 && i > 0) | |
3810 | { | |
3811 | --i, --desired_glyph, --current_glyph; | |
3812 | x -= desired_glyph->pixel_width; | |
3813 | left -= desired_glyph->pixel_width; | |
3814 | } | |
91d227d9 CY |
3815 | |
3816 | /* Abort the skipping algorithm if we end up before | |
3817 | our starting point, to avoid looping (bug#1070). | |
3818 | This can happen when the lbearing is larger than | |
3819 | the pixel width. */ | |
3820 | abort_skipping = (i < start_hpos); | |
5f5c8ee5 | 3821 | } |
352f1545 | 3822 | } |
177c0ea7 | 3823 | |
5f5c8ee5 GM |
3824 | /* Try to avoid writing the entire rest of the desired row |
3825 | by looking for a resync point. This mainly prevents | |
3826 | mode line flickering in the case the mode line is in | |
3827 | fixed-pitch font, which it usually will be. */ | |
3828 | if (i < desired_row->used[TEXT_AREA]) | |
3829 | { | |
3830 | int start_x = x, start_hpos = i; | |
3831 | struct glyph *start = desired_glyph; | |
3832 | int current_x = x; | |
59ea14cd | 3833 | bool skip_first_p = !can_skip_p; |
6d950f4c | 3834 | |
5f5c8ee5 GM |
3835 | /* Find the next glyph that's equal again. */ |
3836 | while (i < stop | |
6d950f4c GM |
3837 | && (skip_first_p |
3838 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
3839 | && x == current_x) |
3840 | { | |
3841 | x += desired_glyph->pixel_width; | |
3842 | current_x += current_glyph->pixel_width; | |
3843 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 3844 | skip_first_p = 0; |
5f5c8ee5 | 3845 | } |
23b0200c | 3846 | |
5f5c8ee5 GM |
3847 | if (i == start_hpos || x != current_x) |
3848 | { | |
3849 | i = start_hpos; | |
3850 | x = start_x; | |
3851 | desired_glyph = start; | |
3852 | break; | |
3853 | } | |
e47306e6 | 3854 | |
5f5c8ee5 GM |
3855 | rif->cursor_to (vpos, start_hpos, desired_row->y, start_x); |
3856 | rif->write_glyphs (start, i - start_hpos); | |
408f5064 | 3857 | changed_p = 1; |
5f5c8ee5 GM |
3858 | } |
3859 | } | |
177c0ea7 | 3860 | |
5f5c8ee5 GM |
3861 | /* Write the rest. */ |
3862 | if (i < desired_row->used[TEXT_AREA]) | |
3863 | { | |
3864 | rif->cursor_to (vpos, i, desired_row->y, x); | |
3865 | rif->write_glyphs (desired_glyph, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 3866 | changed_p = 1; |
5f5c8ee5 | 3867 | } |
177c0ea7 | 3868 | |
5f5c8ee5 GM |
3869 | /* Maybe clear to end of line. */ |
3870 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
3871 | { | |
3872 | /* If new row extends to the end of the text area, nothing | |
3873 | has to be cleared, if and only if we did a write_glyphs | |
3874 | above. This is made sure by setting desired_stop_pos | |
3875 | appropriately above. */ | |
a54e2c05 | 3876 | eassert (i < desired_row->used[TEXT_AREA] |
78897758 YM |
3877 | || ((desired_row->used[TEXT_AREA] |
3878 | == current_row->used[TEXT_AREA]) | |
3879 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
3880 | } |
3881 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
3882 | { | |
3883 | /* If old row extends to the end of the text area, clear. */ | |
3884 | if (i >= desired_row->used[TEXT_AREA]) | |
3885 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3886 | desired_row->pixel_width); |
5f5c8ee5 | 3887 | rif->clear_end_of_line (-1); |
408f5064 | 3888 | changed_p = 1; |
5f5c8ee5 GM |
3889 | } |
3890 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 3891 | { |
5f5c8ee5 GM |
3892 | /* Otherwise clear to the end of the old row. Everything |
3893 | after that position should be clear already. */ | |
27786b2f | 3894 | int xlim; |
177c0ea7 | 3895 | |
5f5c8ee5 GM |
3896 | if (i >= desired_row->used[TEXT_AREA]) |
3897 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3898 | desired_row->pixel_width); |
5f5c8ee5 GM |
3899 | |
3900 | /* If cursor is displayed at the end of the line, make sure | |
3901 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
3902 | with which to erase the cursor (because this method | |
3903 | doesn't work with lbearing/rbearing), so we must do it | |
3904 | this way. */ | |
3905 | if (vpos == w->phys_cursor.vpos | |
f951a506 EZ |
3906 | && (desired_row->reversed_p |
3907 | ? (w->phys_cursor.hpos < 0) | |
3908 | : (w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]))) | |
5f5c8ee5 GM |
3909 | { |
3910 | w->phys_cursor_on_p = 0; | |
27786b2f | 3911 | xlim = -1; |
5f5c8ee5 GM |
3912 | } |
3913 | else | |
27786b2f PE |
3914 | xlim = current_row->pixel_width; |
3915 | rif->clear_end_of_line (xlim); | |
408f5064 | 3916 | changed_p = 1; |
2e8907d3 | 3917 | } |
23b0200c | 3918 | } |
408f5064 GM |
3919 | |
3920 | return changed_p; | |
23b0200c | 3921 | } |
4588ec20 | 3922 | |
5f5c8ee5 | 3923 | |
59ea14cd | 3924 | /* Update row VPOS in window W. Value is true if display has been changed. */ |
5f5c8ee5 | 3925 | |
59ea14cd PE |
3926 | static bool |
3927 | update_window_line (struct window *w, int vpos, bool *mouse_face_overwritten_p) | |
5f5c8ee5 GM |
3928 | { |
3929 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
3930 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3931 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
59ea14cd | 3932 | bool changed_p = 0; |
5f5c8ee5 | 3933 | |
5f5c8ee5 GM |
3934 | /* Set the row being updated. This is important to let xterm.c |
3935 | know what line height values are in effect. */ | |
3936 | updated_row = desired_row; | |
3937 | ||
177c0ea7 JB |
3938 | /* A row can be completely invisible in case a desired matrix was |
3939 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
3940 | the matrix. Make sure to make such rows current anyway, since |
3941 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
3942 | if (desired_row->mode_line_p |
3943 | || desired_row->visible_height > 0) | |
408f5064 | 3944 | { |
a54e2c05 | 3945 | eassert (desired_row->enabled_p); |
504805ac GM |
3946 | |
3947 | /* Update display of the left margin area, if there is one. */ | |
3948 | if (!desired_row->full_width_p | |
d3d50620 | 3949 | && !NILP (w->left_margin_cols)) |
504805ac GM |
3950 | { |
3951 | changed_p = 1; | |
3952 | update_marginal_area (w, LEFT_MARGIN_AREA, vpos); | |
e9957956 EZ |
3953 | /* Setting this flag will ensure the vertical border, if |
3954 | any, between this window and the one on its left will be | |
3955 | redrawn. This is necessary because updating the left | |
3956 | margin area can potentially draw over the border. */ | |
3957 | current_row->redraw_fringe_bitmaps_p = 1; | |
504805ac | 3958 | } |
177c0ea7 | 3959 | |
504805ac GM |
3960 | /* Update the display of the text area. */ |
3961 | if (update_text_area (w, vpos)) | |
3962 | { | |
3963 | changed_p = 1; | |
3964 | if (current_row->mouse_face_p) | |
3965 | *mouse_face_overwritten_p = 1; | |
3966 | } | |
177c0ea7 | 3967 | |
504805ac GM |
3968 | /* Update display of the right margin area, if there is one. */ |
3969 | if (!desired_row->full_width_p | |
d3d50620 | 3970 | && !NILP (w->right_margin_cols)) |
504805ac GM |
3971 | { |
3972 | changed_p = 1; | |
3973 | update_marginal_area (w, RIGHT_MARGIN_AREA, vpos); | |
3974 | } | |
177c0ea7 | 3975 | |
504805ac GM |
3976 | /* Draw truncation marks etc. */ |
3977 | if (!current_row->enabled_p | |
3978 | || desired_row->y != current_row->y | |
3979 | || desired_row->visible_height != current_row->visible_height | |
6b61353c | 3980 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 3981 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
6b61353c | 3982 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 3983 | || desired_row->mode_line_p != current_row->mode_line_p |
6b61353c | 3984 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
3985 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
3986 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
3987 | rif->after_update_window_line_hook (desired_row); | |
408f5064 | 3988 | } |
177c0ea7 | 3989 | |
5f5c8ee5 GM |
3990 | /* Update current_row from desired_row. */ |
3991 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
3992 | updated_row = NULL; | |
408f5064 | 3993 | return changed_p; |
5f5c8ee5 GM |
3994 | } |
3995 | ||
3996 | ||
3997 | /* Set the cursor after an update of window W. This function may only | |
3998 | be called from update_window. */ | |
3999 | ||
4000 | static void | |
971de7fb | 4001 | set_window_cursor_after_update (struct window *w) |
4588ec20 | 4002 | { |
d3d50620 | 4003 | struct frame *f = XFRAME (w->frame); |
fa971ac3 | 4004 | struct redisplay_interface *rif = FRAME_RIF (f); |
5f5c8ee5 GM |
4005 | int cx, cy, vpos, hpos; |
4006 | ||
4007 | /* Not intended for frame matrix updates. */ | |
a54e2c05 | 4008 | eassert (FRAME_WINDOW_P (f)); |
177c0ea7 | 4009 | |
b96fd3e8 GM |
4010 | if (cursor_in_echo_area |
4011 | && !NILP (echo_area_buffer[0]) | |
4012 | /* If we are showing a message instead of the mini-buffer, | |
4013 | show the cursor for the message instead. */ | |
4014 | && XWINDOW (minibuf_window) == w | |
4015 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
4016 | /* These cases apply only to the frame that contains |
4017 | the active mini-buffer window. */ | |
4018 | && FRAME_HAS_MINIBUF_P (f) | |
4019 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
4020 | { | |
4021 | cx = cy = vpos = hpos = 0; | |
4022 | ||
4023 | if (cursor_in_echo_area >= 0) | |
4024 | { | |
4025 | /* If the mini-buffer is several lines high, find the last | |
4026 | line that has any text on it. Note: either all lines | |
4027 | are enabled or none. Otherwise we wouldn't be able to | |
4028 | determine Y. */ | |
862b4790 GM |
4029 | struct glyph_row *row, *last_row; |
4030 | struct glyph *glyph; | |
4031 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 4032 | |
862b4790 | 4033 | last_row = NULL; |
6206f8ce GM |
4034 | row = w->current_matrix->rows; |
4035 | while (row->enabled_p | |
4036 | && (last_row == NULL | |
4037 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 4038 | { |
862b4790 GM |
4039 | if (row->used[TEXT_AREA] |
4040 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
4041 | last_row = row; | |
6206f8ce | 4042 | ++row; |
862b4790 | 4043 | } |
177c0ea7 | 4044 | |
5f5c8ee5 GM |
4045 | if (last_row) |
4046 | { | |
6206f8ce GM |
4047 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
4048 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 4049 | |
b96fd3e8 | 4050 | while (last > start && last->charpos < 0) |
862b4790 | 4051 | --last; |
177c0ea7 | 4052 | |
862b4790 GM |
4053 | for (glyph = start; glyph < last; ++glyph) |
4054 | { | |
4055 | cx += glyph->pixel_width; | |
4056 | ++hpos; | |
4057 | } | |
4058 | ||
5f5c8ee5 | 4059 | cy = last_row->y; |
862b4790 | 4060 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
4061 | } |
4062 | } | |
4063 | } | |
4064 | else | |
4065 | { | |
4066 | cx = w->cursor.x; | |
4067 | cy = w->cursor.y; | |
4068 | hpos = w->cursor.hpos; | |
4069 | vpos = w->cursor.vpos; | |
4070 | } | |
4588ec20 | 4071 | |
5f5c8ee5 | 4072 | /* Window cursor can be out of sync for horizontally split windows. */ |
f951a506 | 4073 | hpos = max (-1, hpos); /* -1 is for when cursor is on the left fringe */ |
5f5c8ee5 GM |
4074 | hpos = min (w->current_matrix->matrix_w - 1, hpos); |
4075 | vpos = max (0, vpos); | |
4076 | vpos = min (w->current_matrix->nrows - 1, vpos); | |
4077 | rif->cursor_to (vpos, hpos, cy, cx); | |
4588ec20 | 4078 | } |
4588ec20 | 4079 | |
5f5c8ee5 | 4080 | |
6df5d75f GM |
4081 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window |
4082 | tree rooted at W. */ | |
4083 | ||
4084 | void | |
59ea14cd | 4085 | set_window_update_flags (struct window *w, bool on_p) |
6df5d75f GM |
4086 | { |
4087 | while (w) | |
4088 | { | |
d3d50620 DA |
4089 | if (!NILP (w->hchild)) |
4090 | set_window_update_flags (XWINDOW (w->hchild), on_p); | |
4091 | else if (!NILP (w->vchild)) | |
4092 | set_window_update_flags (XWINDOW (w->vchild), on_p); | |
6df5d75f GM |
4093 | else |
4094 | w->must_be_updated_p = on_p; | |
4095 | ||
d3d50620 | 4096 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
6df5d75f | 4097 | } |
177c0ea7 | 4098 | } |
6df5d75f GM |
4099 | |
4100 | ||
4101 | \f | |
4102 | /*********************************************************************** | |
4103 | Window-Based Scrolling | |
4104 | ***********************************************************************/ | |
4105 | ||
4106 | /* Structure describing rows in scrolling_window. */ | |
4107 | ||
4108 | struct row_entry | |
4109 | { | |
4110 | /* Number of occurrences of this row in desired and current matrix. */ | |
4111 | int old_uses, new_uses; | |
177c0ea7 | 4112 | |
6df5d75f GM |
4113 | /* Vpos of row in new matrix. */ |
4114 | int new_line_number; | |
4115 | ||
4116 | /* Bucket index of this row_entry in the hash table row_table. */ | |
ca9ce8f2 | 4117 | ptrdiff_t bucket; |
177c0ea7 | 4118 | |
6df5d75f GM |
4119 | /* The row described by this entry. */ |
4120 | struct glyph_row *row; | |
177c0ea7 | 4121 | |
6df5d75f GM |
4122 | /* Hash collision chain. */ |
4123 | struct row_entry *next; | |
4124 | }; | |
4125 | ||
4126 | /* A pool to allocate row_entry structures from, and the size of the | |
4127 | pool. The pool is reallocated in scrolling_window when we find | |
4128 | that we need a larger one. */ | |
4129 | ||
4130 | static struct row_entry *row_entry_pool; | |
ca9ce8f2 | 4131 | static ptrdiff_t row_entry_pool_size; |
6df5d75f GM |
4132 | |
4133 | /* Index of next free entry in row_entry_pool. */ | |
4134 | ||
ca9ce8f2 | 4135 | static ptrdiff_t row_entry_idx; |
6df5d75f GM |
4136 | |
4137 | /* The hash table used during scrolling, and the table's size. This | |
4138 | table is used to quickly identify equal rows in the desired and | |
4139 | current matrix. */ | |
4140 | ||
4141 | static struct row_entry **row_table; | |
ca9ce8f2 | 4142 | static ptrdiff_t row_table_size; |
6df5d75f GM |
4143 | |
4144 | /* Vectors of pointers to row_entry structures belonging to the | |
4145 | current and desired matrix, and the size of the vectors. */ | |
4146 | ||
4147 | static struct row_entry **old_lines, **new_lines; | |
0065d054 | 4148 | static ptrdiff_t old_lines_size, new_lines_size; |
6df5d75f GM |
4149 | |
4150 | /* A pool to allocate run structures from, and its size. */ | |
4151 | ||
4152 | static struct run *run_pool; | |
0065d054 | 4153 | static ptrdiff_t runs_size; |
6df5d75f GM |
4154 | |
4155 | /* A vector of runs of lines found during scrolling. */ | |
4156 | ||
4157 | static struct run **runs; | |
4158 | ||
6b1f9ba4 | 4159 | /* Add glyph row ROW to the scrolling hash table. */ |
6df5d75f | 4160 | |
b0ab8123 | 4161 | static struct row_entry * |
6b1f9ba4 | 4162 | add_row_entry (struct glyph_row *row) |
6df5d75f GM |
4163 | { |
4164 | struct row_entry *entry; | |
ca9ce8f2 | 4165 | ptrdiff_t i = row->hash % row_table_size; |
177c0ea7 | 4166 | |
6df5d75f | 4167 | entry = row_table[i]; |
a54e2c05 | 4168 | eassert (entry || verify_row_hash (row)); |
6b1f9ba4 | 4169 | while (entry && !row_equal_p (entry->row, row, 1)) |
6df5d75f | 4170 | entry = entry->next; |
177c0ea7 | 4171 | |
6df5d75f GM |
4172 | if (entry == NULL) |
4173 | { | |
4174 | entry = row_entry_pool + row_entry_idx++; | |
4175 | entry->row = row; | |
4176 | entry->old_uses = entry->new_uses = 0; | |
4177 | entry->new_line_number = 0; | |
4178 | entry->bucket = i; | |
4179 | entry->next = row_table[i]; | |
4180 | row_table[i] = entry; | |
4181 | } | |
4182 | ||
4183 | return entry; | |
4184 | } | |
4185 | ||
4186 | ||
5f5c8ee5 | 4187 | /* Try to reuse part of the current display of W by scrolling lines. |
59ea14cd | 4188 | HEADER_LINE_P means W has a header line. |
5f5c8ee5 GM |
4189 | |
4190 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4191 | Technique for Isolating Differences Between Files." It should take | |
4192 | O(N) time. | |
4193 | ||
4194 | A short outline of the steps of the algorithm | |
4195 | ||
4196 | 1. Skip lines equal at the start and end of both matrices. | |
4197 | ||
4198 | 2. Enter rows in the current and desired matrix into a symbol | |
4199 | table, counting how often they appear in both matrices. | |
4200 | ||
4201 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4202 | i.e. we assume that such lines are likely to have been moved. | |
4203 | ||
4204 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4205 | forward and backward. | |
4206 | ||
4207 | Value is | |
4208 | ||
4209 | -1 if all rows were found to be equal. | |
4210 | 0 to indicate that we did not scroll the display, or | |
4211 | 1 if we did scroll. */ | |
4212 | ||
4213 | static int | |
59ea14cd | 4214 | scrolling_window (struct window *w, bool header_line_p) |
4588ec20 | 4215 | { |
5f5c8ee5 GM |
4216 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4217 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4218 | int yb = window_text_bottom_y (w); | |
ca9ce8f2 PE |
4219 | ptrdiff_t i; |
4220 | int j, first_old, first_new, last_old, last_new; | |
4221 | int nruns, run_idx; | |
0065d054 | 4222 | ptrdiff_t n; |
6df5d75f | 4223 | struct row_entry *entry; |
fa971ac3 | 4224 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4225 | |
4226 | /* Skip over rows equal at the start. */ | |
59ea14cd | 4227 | for (i = header_line_p; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4228 | { |
bfdcafe1 GM |
4229 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4230 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4231 | ||
4232 | if (c->enabled_p | |
4233 | && d->enabled_p | |
6b61353c | 4234 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4235 | && c->y == d->y |
4236 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4237 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
6b1f9ba4 | 4238 | && row_equal_p (c, d, 1)) |
bfdcafe1 GM |
4239 | { |
4240 | assign_row (c, d); | |
4241 | d->enabled_p = 0; | |
4242 | } | |
4243 | else | |
4244 | break; | |
5f5c8ee5 | 4245 | } |
4588ec20 | 4246 | |
5f5c8ee5 GM |
4247 | /* Give up if some rows in the desired matrix are not enabled. */ |
4248 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4249 | return -1; | |
177c0ea7 | 4250 | |
5f5c8ee5 GM |
4251 | first_old = first_new = i; |
4252 | ||
4d8ade89 YM |
4253 | /* Set last_new to the index + 1 of the row that reaches the |
4254 | bottom boundary in the desired matrix. Give up if we find a | |
4255 | disabled row before we reach the bottom boundary. */ | |
5f5c8ee5 | 4256 | i = first_new + 1; |
4d8ade89 YM |
4257 | while (i < desired_matrix->nrows - 1) |
4258 | { | |
4259 | int bottom; | |
5f5c8ee5 | 4260 | |
4d8ade89 YM |
4261 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) |
4262 | return 0; | |
4263 | bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)); | |
4264 | if (bottom <= yb) | |
4265 | ++i; | |
4266 | if (bottom >= yb) | |
4267 | break; | |
4268 | } | |
5f5c8ee5 GM |
4269 | |
4270 | last_new = i; | |
4271 | ||
4d8ade89 YM |
4272 | /* Set last_old to the index + 1 of the row that reaches the bottom |
4273 | boundary in the current matrix. We don't look at the enabled | |
4274 | flag here because we plan to reuse part of the display even if | |
4275 | other parts are disabled. */ | |
5f5c8ee5 | 4276 | i = first_old + 1; |
93962bfa GM |
4277 | while (i < current_matrix->nrows - 1) |
4278 | { | |
4279 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4280 | if (bottom <= yb) | |
4281 | ++i; | |
4282 | if (bottom >= yb) | |
4283 | break; | |
4284 | } | |
4285 | ||
5f5c8ee5 GM |
4286 | last_old = i; |
4287 | ||
4288 | /* Skip over rows equal at the bottom. */ | |
4289 | i = last_new; | |
4290 | j = last_old; | |
4291 | while (i - 1 > first_new | |
4292 | && j - 1 > first_old | |
1e5b2111 EZ |
4293 | && MATRIX_ROW (current_matrix, j - 1)->enabled_p |
4294 | && (MATRIX_ROW (current_matrix, j - 1)->y | |
4295 | == MATRIX_ROW (desired_matrix, i - 1)->y) | |
4296 | && !MATRIX_ROW (desired_matrix, i - 1)->redraw_fringe_bitmaps_p | |
6b1f9ba4 | 4297 | && row_equal_p (MATRIX_ROW (desired_matrix, i - 1), |
e4e0bee9 | 4298 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
4299 | --i, --j; |
4300 | last_new = i; | |
4301 | last_old = j; | |
4302 | ||
4303 | /* Nothing to do if all rows are equal. */ | |
4304 | if (last_new == first_new) | |
4305 | return 0; | |
4306 | ||
0065d054 | 4307 | /* Check for integer overflow in size calculation. |
ca9ce8f2 PE |
4308 | |
4309 | If next_almost_prime checks (N) for divisibility by 2..10, then | |
4310 | it can return at most N + 10, e.g., next_almost_prime (1) == 11. | |
4311 | So, set next_almost_prime_increment_max to 10. | |
4312 | ||
4313 | It's just a coincidence that next_almost_prime_increment_max == | |
4314 | NEXT_ALMOST_PRIME_LIMIT - 1. If NEXT_ALMOST_PRIME_LIMIT were | |
4315 | 13, then next_almost_prime_increment_max would be 14, e.g., | |
4316 | because next_almost_prime (113) would be 127. */ | |
4317 | { | |
4318 | verify (NEXT_ALMOST_PRIME_LIMIT == 11); | |
4319 | enum { next_almost_prime_increment_max = 10 }; | |
ca9ce8f2 | 4320 | ptrdiff_t row_table_max = |
0065d054 PE |
4321 | (min (PTRDIFF_MAX, SIZE_MAX) / (3 * sizeof *row_table) |
4322 | - next_almost_prime_increment_max); | |
4323 | ptrdiff_t current_nrows_max = row_table_max - desired_matrix->nrows; | |
4324 | if (current_nrows_max < current_matrix->nrows) | |
ca9ce8f2 PE |
4325 | memory_full (SIZE_MAX); |
4326 | } | |
4327 | ||
6df5d75f | 4328 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 4329 | |
6df5d75f | 4330 | if (current_matrix->nrows > old_lines_size) |
0065d054 PE |
4331 | old_lines = xpalloc (old_lines, &old_lines_size, |
4332 | current_matrix->nrows - old_lines_size, | |
4333 | INT_MAX, sizeof *old_lines); | |
177c0ea7 | 4334 | |
6df5d75f | 4335 | if (desired_matrix->nrows > new_lines_size) |
0065d054 PE |
4336 | new_lines = xpalloc (new_lines, &new_lines_size, |
4337 | desired_matrix->nrows - new_lines_size, | |
4338 | INT_MAX, sizeof *new_lines); | |
6df5d75f | 4339 | |
ca9ce8f2 PE |
4340 | n = desired_matrix->nrows; |
4341 | n += current_matrix->nrows; | |
0065d054 | 4342 | if (row_table_size < 3 * n) |
6df5d75f | 4343 | { |
ca9ce8f2 | 4344 | ptrdiff_t size = next_almost_prime (3 * n); |
0065d054 | 4345 | row_table = xnrealloc (row_table, size, sizeof *row_table); |
ca9ce8f2 | 4346 | row_table_size = size; |
0065d054 | 4347 | memset (row_table, 0, size * sizeof *row_table); |
6df5d75f GM |
4348 | } |
4349 | ||
4350 | if (n > row_entry_pool_size) | |
0065d054 PE |
4351 | row_entry_pool = xpalloc (row_entry_pool, &row_entry_pool_size, |
4352 | n - row_entry_pool_size, | |
4353 | -1, sizeof *row_entry_pool); | |
6df5d75f GM |
4354 | |
4355 | if (desired_matrix->nrows > runs_size) | |
4356 | { | |
0065d054 PE |
4357 | runs = xnrealloc (runs, desired_matrix->nrows, sizeof *runs); |
4358 | run_pool = xnrealloc (run_pool, desired_matrix->nrows, sizeof *run_pool); | |
ca9ce8f2 | 4359 | runs_size = desired_matrix->nrows; |
6df5d75f GM |
4360 | } |
4361 | ||
4362 | nruns = run_idx = 0; | |
4363 | row_entry_idx = 0; | |
4364 | ||
4365 | /* Add rows from the current and desired matrix to the hash table | |
4366 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 4367 | |
5f5c8ee5 GM |
4368 | for (i = first_old; i < last_old; ++i) |
4369 | { | |
4370 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
4371 | { | |
6b1f9ba4 | 4372 | entry = add_row_entry (MATRIX_ROW (current_matrix, i)); |
6df5d75f GM |
4373 | old_lines[i] = entry; |
4374 | ++entry->old_uses; | |
5f5c8ee5 GM |
4375 | } |
4376 | else | |
6df5d75f | 4377 | old_lines[i] = NULL; |
5f5c8ee5 GM |
4378 | } |
4379 | ||
5f5c8ee5 GM |
4380 | for (i = first_new; i < last_new; ++i) |
4381 | { | |
a54e2c05 | 4382 | eassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); |
6b1f9ba4 | 4383 | entry = add_row_entry (MATRIX_ROW (desired_matrix, i)); |
6df5d75f GM |
4384 | ++entry->new_uses; |
4385 | entry->new_line_number = i; | |
4386 | new_lines[i] = entry; | |
5f5c8ee5 | 4387 | } |
4588ec20 | 4388 | |
5f5c8ee5 GM |
4389 | /* Identify moves based on lines that are unique and equal |
4390 | in both matrices. */ | |
4391 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
4392 | if (old_lines[i] |
4393 | && old_lines[i]->old_uses == 1 | |
4394 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 | 4395 | { |
27786b2f | 4396 | int p, q; |
6df5d75f GM |
4397 | int new_line = old_lines[i]->new_line_number; |
4398 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
4399 | |
4400 | /* Record move. */ | |
4401 | run->current_vpos = i; | |
4402 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
4403 | run->desired_vpos = new_line; | |
4404 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
4405 | run->nrows = 1; | |
4406 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
4407 | ||
4408 | /* Extend backward. */ | |
27786b2f PE |
4409 | p = i - 1; |
4410 | q = new_line - 1; | |
4411 | while (p > first_old | |
4412 | && q > first_new | |
4413 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4414 | { |
27786b2f | 4415 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 JB |
4416 | --run->current_vpos; |
4417 | --run->desired_vpos; | |
5f5c8ee5 GM |
4418 | ++run->nrows; |
4419 | run->height += h; | |
4420 | run->desired_y -= h; | |
4421 | run->current_y -= h; | |
27786b2f | 4422 | --p, --q; |
5f5c8ee5 | 4423 | } |
4588ec20 | 4424 | |
5f5c8ee5 | 4425 | /* Extend forward. */ |
27786b2f PE |
4426 | p = i + 1; |
4427 | q = new_line + 1; | |
4428 | while (p < last_old | |
4429 | && q < last_new | |
4430 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4431 | { |
27786b2f | 4432 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 | 4433 | ++run->nrows; |
5f5c8ee5 | 4434 | run->height += h; |
27786b2f | 4435 | ++p, ++q; |
5f5c8ee5 | 4436 | } |
19dff8dc | 4437 | |
5f5c8ee5 GM |
4438 | /* Insert run into list of all runs. Order runs by copied |
4439 | pixel lines. Note that we record runs that don't have to | |
4440 | be copied because they are already in place. This is done | |
4441 | because we can avoid calling update_window_line in this | |
4442 | case. */ | |
27786b2f | 4443 | for (p = 0; p < nruns && runs[p]->height > run->height; ++p) |
5f5c8ee5 | 4444 | ; |
27786b2f PE |
4445 | for (q = nruns; q > p; --q) |
4446 | runs[q] = runs[q - 1]; | |
4447 | runs[p] = run; | |
5f5c8ee5 GM |
4448 | ++nruns; |
4449 | ||
4450 | i += run->nrows; | |
4451 | } | |
4452 | else | |
4453 | ++i; | |
4588ec20 | 4454 | |
5f5c8ee5 GM |
4455 | /* Do the moves. Do it in a way that we don't overwrite something |
4456 | we want to copy later on. This is not solvable in general | |
4457 | because there is only one display and we don't have a way to | |
4458 | exchange areas on this display. Example: | |
4588ec20 | 4459 | |
5f5c8ee5 GM |
4460 | +-----------+ +-----------+ |
4461 | | A | | B | | |
4462 | +-----------+ --> +-----------+ | |
4463 | | B | | A | | |
4464 | +-----------+ +-----------+ | |
4588ec20 | 4465 | |
5f5c8ee5 GM |
4466 | Instead, prefer bigger moves, and invalidate moves that would |
4467 | copy from where we copied to. */ | |
ea0d86af | 4468 | |
5f5c8ee5 GM |
4469 | for (i = 0; i < nruns; ++i) |
4470 | if (runs[i]->nrows > 0) | |
4471 | { | |
4472 | struct run *r = runs[i]; | |
24e86043 | 4473 | |
5f5c8ee5 GM |
4474 | /* Copy on the display. */ |
4475 | if (r->current_y != r->desired_y) | |
4476 | { | |
989b42d2 | 4477 | rif->clear_window_mouse_face (w); |
5f5c8ee5 | 4478 | rif->scroll_run_hook (w, r); |
1305621b | 4479 | } |
5f5c8ee5 | 4480 | |
1305621b YM |
4481 | /* Truncate runs that copy to where we copied to, and |
4482 | invalidate runs that copy from where we copied to. */ | |
4483 | for (j = nruns - 1; j > i; --j) | |
4484 | { | |
4485 | struct run *p = runs[j]; | |
59ea14cd | 4486 | bool truncated_p = 0; |
5f5c8ee5 | 4487 | |
1305621b YM |
4488 | if (p->nrows > 0 |
4489 | && p->desired_y < r->desired_y + r->height | |
4490 | && p->desired_y + p->height > r->desired_y) | |
5f5c8ee5 | 4491 | { |
1305621b YM |
4492 | if (p->desired_y < r->desired_y) |
4493 | { | |
4494 | p->nrows = r->desired_vpos - p->desired_vpos; | |
4495 | p->height = r->desired_y - p->desired_y; | |
4496 | truncated_p = 1; | |
4497 | } | |
4498 | else | |
4499 | { | |
4500 | int nrows_copied = (r->desired_vpos + r->nrows | |
4501 | - p->desired_vpos); | |
4502 | ||
4503 | if (p->nrows <= nrows_copied) | |
4504 | p->nrows = 0; | |
4505 | else | |
4506 | { | |
4507 | int height_copied = (r->desired_y + r->height | |
4508 | - p->desired_y); | |
4509 | ||
4510 | p->current_vpos += nrows_copied; | |
4511 | p->desired_vpos += nrows_copied; | |
4512 | p->nrows -= nrows_copied; | |
4513 | p->current_y += height_copied; | |
4514 | p->desired_y += height_copied; | |
4515 | p->height -= height_copied; | |
4516 | truncated_p = 1; | |
4517 | } | |
4518 | } | |
4519 | } | |
177c0ea7 | 4520 | |
1305621b YM |
4521 | if (r->current_y != r->desired_y |
4522 | /* The condition below is equivalent to | |
4523 | ((p->current_y >= r->desired_y | |
5f5c8ee5 | 4524 | && p->current_y < r->desired_y + r->height) |
1305621b | 4525 | || (p->current_y + p->height > r->desired_y |
5f5c8ee5 | 4526 | && (p->current_y + p->height |
1305621b YM |
4527 | <= r->desired_y + r->height))) |
4528 | because we have 0 < p->height <= r->height. */ | |
4529 | && p->current_y < r->desired_y + r->height | |
4530 | && p->current_y + p->height > r->desired_y) | |
4531 | p->nrows = 0; | |
4532 | ||
4533 | /* Reorder runs by copied pixel lines if truncated. */ | |
4534 | if (truncated_p && p->nrows > 0) | |
4535 | { | |
4536 | int k = nruns - 1; | |
4537 | ||
4538 | while (runs[k]->nrows == 0 || runs[k]->height < p->height) | |
4539 | k--; | |
4540 | memmove (runs + j, runs + j + 1, (k - j) * sizeof (*runs)); | |
4541 | runs[k] = p; | |
5f5c8ee5 GM |
4542 | } |
4543 | } | |
ea0d86af | 4544 | |
5f5c8ee5 GM |
4545 | /* Assign matrix rows. */ |
4546 | for (j = 0; j < r->nrows; ++j) | |
4547 | { | |
4548 | struct glyph_row *from, *to; | |
59ea14cd | 4549 | bool to_overlapped_p; |
e876ff42 | 4550 | |
5f5c8ee5 GM |
4551 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
4552 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 4553 | to_overlapped_p = to->overlapped_p; |
e61124cd | 4554 | from->redraw_fringe_bitmaps_p = from->fringe_bitmap_periodic_p; |
5f5c8ee5 | 4555 | assign_row (to, from); |
1305621b YM |
4556 | /* The above `assign_row' actually does swap, so if we had |
4557 | an overlap in the copy destination of two runs, then | |
4558 | the second run would assign a previously disabled bogus | |
4559 | row. But thanks to the truncation code in the | |
4560 | preceding for-loop, we no longer have such an overlap, | |
4561 | and thus the assigned row should always be enabled. */ | |
a54e2c05 | 4562 | eassert (to->enabled_p); |
1305621b | 4563 | from->enabled_p = 0; |
408f5064 | 4564 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
4565 | } |
4566 | } | |
15874c59 | 4567 | |
6df5d75f GM |
4568 | /* Clear the hash table, for the next time. */ |
4569 | for (i = 0; i < row_entry_idx; ++i) | |
4570 | row_table[row_entry_pool[i].bucket] = NULL; | |
4571 | ||
aec1708a PE |
4572 | /* Value is 1 to indicate that we scrolled the display. */ |
4573 | return 0 < nruns; | |
5f5c8ee5 | 4574 | } |
de83c314 | 4575 | |
15874c59 | 4576 | |
4588ec20 | 4577 | \f |
5f5c8ee5 GM |
4578 | /************************************************************************ |
4579 | Frame-Based Updates | |
4580 | ************************************************************************/ | |
4588ec20 | 4581 | |
5f5c8ee5 | 4582 | /* Update the desired frame matrix of frame F. |
4588ec20 | 4583 | |
59ea14cd PE |
4584 | FORCE_P means that the update should not be stopped by pending input. |
4585 | INHIBIT_HAIRY_ID_P means that scrolling should not be tried. | |
5f5c8ee5 | 4586 | |
59ea14cd | 4587 | Value is true if update was stopped due to pending input. */ |
5f5c8ee5 | 4588 | |
59ea14cd PE |
4589 | static bool |
4590 | update_frame_1 (struct frame *f, bool force_p, bool inhibit_id_p) | |
4588ec20 | 4591 | { |
5f5c8ee5 GM |
4592 | /* Frame matrices to work on. */ |
4593 | struct glyph_matrix *current_matrix = f->current_matrix; | |
4594 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
4595 | int i; | |
59ea14cd | 4596 | bool pause_p; |
4588ec20 | 4597 | int preempt_count = baud_rate / 2400 + 1; |
5f5c8ee5 | 4598 | |
a54e2c05 | 4599 | eassert (current_matrix && desired_matrix); |
4588ec20 | 4600 | |
c37e4889 RS |
4601 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
4602 | calculate_costs (f); | |
4603 | ||
d88c2b9e RS |
4604 | if (preempt_count <= 0) |
4605 | preempt_count = 1; | |
4606 | ||
a2130dbb KS |
4607 | #if !PERIODIC_PREEMPTION_CHECKING |
4608 | if (!force_p && detect_input_pending_ignore_squeezables ()) | |
4588ec20 | 4609 | { |
27786b2f | 4610 | pause_p = 1; |
4588ec20 JB |
4611 | goto do_pause; |
4612 | } | |
d012c62b | 4613 | #endif |
4588ec20 | 4614 | |
5f5c8ee5 | 4615 | /* If we cannot insert/delete lines, it's no use trying it. */ |
daf01701 | 4616 | if (!FRAME_LINE_INS_DEL_OK (f)) |
5f5c8ee5 | 4617 | inhibit_id_p = 1; |
7098a0fa | 4618 | |
efb859b4 | 4619 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
4620 | i/d line if just want cursor motion. */ |
4621 | for (i = 0; i < desired_matrix->nrows; i++) | |
4622 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
4623 | break; |
4624 | ||
4625 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
4626 | if (!inhibit_id_p && i < desired_matrix->nrows) |
4627 | force_p |= scrolling (f); | |
4588ec20 JB |
4628 | |
4629 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
4630 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
4631 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 4632 | |
5f5c8ee5 GM |
4633 | /* Now update the rest of the lines. */ |
4634 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 4635 | { |
5f5c8ee5 | 4636 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 4637 | { |
b6a65ac2 | 4638 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
4639 | { |
4640 | /* Flush out every so many lines. | |
4641 | Also flush out if likely to have more than 1k buffered | |
4642 | otherwise. I'm told that some telnet connections get | |
4643 | really screwed by more than 1k output at once. */ | |
fced92f1 CY |
4644 | FILE *display_output = FRAME_TTY (f)->output; |
4645 | if (display_output) | |
4588ec20 | 4646 | { |
fced92f1 CY |
4647 | int outq = PENDING_OUTPUT_COUNT (display_output); |
4648 | if (outq > 900 | |
4649 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
4588ec20 | 4650 | { |
fced92f1 CY |
4651 | fflush (display_output); |
4652 | if (preempt_count == 1) | |
4653 | { | |
a41f8bed | 4654 | #ifdef EMACS_OUTQSIZE |
fced92f1 CY |
4655 | if (EMACS_OUTQSIZE (0, &outq) < 0) |
4656 | /* Probably not a tty. Ignore the error and reset | |
4657 | the outq count. */ | |
4658 | outq = PENDING_OUTPUT_COUNT (FRAME_TTY (f->output)); | |
4588ec20 | 4659 | #endif |
fced92f1 CY |
4660 | outq *= 10; |
4661 | if (baud_rate <= outq && baud_rate > 0) | |
4662 | sleep (outq / baud_rate); | |
4663 | } | |
4588ec20 JB |
4664 | } |
4665 | } | |
4588ec20 JB |
4666 | } |
4667 | ||
d012c62b KS |
4668 | #if PERIODIC_PREEMPTION_CHECKING |
4669 | if (!force_p) | |
4670 | { | |
e9a9ae03 | 4671 | EMACS_TIME tm = current_emacs_time (); |
d35af63c | 4672 | if (EMACS_TIME_LT (preemption_next_check, tm)) |
d012c62b | 4673 | { |
e9a9ae03 | 4674 | preemption_next_check = add_emacs_time (tm, preemption_period); |
993d4ab6 KS |
4675 | if (detect_input_pending_ignore_squeezables ()) |
4676 | break; | |
d012c62b KS |
4677 | } |
4678 | } | |
4679 | #else | |
4680 | if (!force_p && (i - 1) % preempt_count == 0) | |
a2d5fca0 | 4681 | detect_input_pending_ignore_squeezables (); |
d012c62b | 4682 | #endif |
a2960116 | 4683 | |
5f5c8ee5 | 4684 | update_frame_line (f, i); |
4588ec20 | 4685 | } |
4588ec20 | 4686 | } |
177c0ea7 | 4687 | |
b98521db | 4688 | lint_assume (0 <= FRAME_LINES (f)); |
59ea14cd | 4689 | pause_p = 0 < i && i < FRAME_LINES (f) - 1; |
4588ec20 JB |
4690 | |
4691 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
27786b2f | 4692 | if (!pause_p) |
4588ec20 | 4693 | { |
48cf7030 | 4694 | if ((cursor_in_echo_area |
5f5c8ee5 | 4695 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 4696 | show the cursor for the message instead of for the |
5f5c8ee5 | 4697 | (now hidden) mini-buffer contents. */ |
2577053b RS |
4698 | || (EQ (minibuf_window, selected_window) |
4699 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 4700 | && !NILP (echo_area_buffer[0]))) |
2577053b | 4701 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 4702 | the active mini-buffer window. */ |
2577053b | 4703 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 4704 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 4705 | { |
7df02016 | 4706 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
4707 | int row, col; |
4708 | ||
4709 | if (cursor_in_echo_area < 0) | |
4710 | { | |
5f5c8ee5 GM |
4711 | /* Negative value of cursor_in_echo_area means put |
4712 | cursor at beginning of line. */ | |
648fa17d JB |
4713 | row = top; |
4714 | col = 0; | |
4715 | } | |
1113d9db | 4716 | else |
648fa17d | 4717 | { |
5f5c8ee5 GM |
4718 | /* Positive value of cursor_in_echo_area means put |
4719 | cursor at the end of the prompt. If the mini-buffer | |
4720 | is several lines high, find the last line that has | |
4721 | any text on it. */ | |
7df02016 | 4722 | row = FRAME_LINES (f); |
177c0ea7 | 4723 | do |
648fa17d | 4724 | { |
5f5c8ee5 GM |
4725 | --row; |
4726 | col = 0; | |
177c0ea7 | 4727 | |
5f5c8ee5 GM |
4728 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
4729 | { | |
4730 | /* Frame rows are filled up with spaces that | |
4731 | must be ignored here. */ | |
5f5c8ee5 GM |
4732 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
4733 | row); | |
4734 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
4735 | struct glyph *last = start + r->used[TEXT_AREA]; | |
4736 | ||
4737 | while (last > start | |
4738 | && (last - 1)->charpos < 0) | |
4739 | --last; | |
177c0ea7 | 4740 | |
5f5c8ee5 GM |
4741 | col = last - start; |
4742 | } | |
648fa17d JB |
4743 | } |
4744 | while (row > top && col == 0); | |
4745 | ||
6395da5c | 4746 | /* Make sure COL is not out of range. */ |
868e640e | 4747 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 4748 | { |
6395da5c | 4749 | /* If we have another row, advance cursor into it. */ |
7df02016 | 4750 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 4751 | { |
7df02016 | 4752 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
4753 | row++; |
4754 | } | |
4755 | /* Otherwise move it back in range. */ | |
4756 | else | |
868e640e | 4757 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
4758 | } |
4759 | } | |
4760 | ||
385ed61f | 4761 | cursor_to (f, row, col); |
1113d9db | 4762 | } |
4588ec20 | 4763 | else |
5f5c8ee5 GM |
4764 | { |
4765 | /* We have only one cursor on terminal frames. Use it to | |
4766 | display the cursor of the selected window. */ | |
4767 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
4768 | if (w->cursor.vpos >= 0 |
4769 | /* The cursor vpos may be temporarily out of bounds | |
4770 | in the following situation: There is one window, | |
4771 | with the cursor in the lower half of it. The window | |
4772 | is split, and a message causes a redisplay before | |
4773 | a new cursor position has been computed. */ | |
7df02016 | 4774 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
4775 | { |
4776 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
4777 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
4778 | ||
d3d50620 DA |
4779 | if (INTEGERP (w->left_margin_cols)) |
4780 | x += XFASTINT (w->left_margin_cols); | |
177c0ea7 | 4781 | |
7df02016 | 4782 | /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */ |
385ed61f | 4783 | cursor_to (f, y, x); |
5f5c8ee5 GM |
4784 | } |
4785 | } | |
4588ec20 JB |
4786 | } |
4787 | ||
ef1b0ba7 | 4788 | #if !PERIODIC_PREEMPTION_CHECKING |
4588ec20 | 4789 | do_pause: |
ef1b0ba7 | 4790 | #endif |
4588ec20 | 4791 | |
5f5c8ee5 | 4792 | clear_desired_matrices (f); |
27786b2f | 4793 | return pause_p; |
4588ec20 JB |
4794 | } |
4795 | ||
4588ec20 | 4796 | |
5f5c8ee5 | 4797 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 4798 | |
59ea14cd | 4799 | static bool |
971de7fb | 4800 | scrolling (struct frame *frame) |
4588ec20 JB |
4801 | { |
4802 | int unchanged_at_top, unchanged_at_bottom; | |
4803 | int window_size; | |
4804 | int changed_lines; | |
38182d90 PE |
4805 | int *old_hash = alloca (FRAME_LINES (frame) * sizeof (int)); |
4806 | int *new_hash = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4807 | int *draw_cost = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4808 | int *old_draw_cost = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 4809 | register int i; |
7df02016 | 4810 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
4811 | struct glyph_matrix *current_matrix = frame->current_matrix; |
4812 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 4813 | |
5f5c8ee5 | 4814 | if (!current_matrix) |
1088b922 | 4815 | emacs_abort (); |
4588ec20 | 4816 | |
5f5c8ee5 GM |
4817 | /* Compute hash codes of all the lines. Also calculate number of |
4818 | changed lines, number of unchanged lines at the beginning, and | |
4819 | number of unchanged lines at the end. */ | |
4588ec20 JB |
4820 | changed_lines = 0; |
4821 | unchanged_at_top = 0; | |
7df02016 KS |
4822 | unchanged_at_bottom = FRAME_LINES (frame); |
4823 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
4824 | { |
4825 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 4826 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 4827 | return 0; |
5f5c8ee5 GM |
4828 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
4829 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
4830 | { |
4831 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
4832 | new_hash[i] = old_hash[i]; | |
4833 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
4834 | draw_cost[i] = INFINITY; | |
4835 | } | |
4588ec20 | 4836 | else |
f188b3c4 | 4837 | { |
5f5c8ee5 GM |
4838 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
4839 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 4840 | } |
4588ec20 JB |
4841 | |
4842 | if (old_hash[i] != new_hash[i]) | |
4843 | { | |
4844 | changed_lines++; | |
7df02016 | 4845 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
4846 | } |
4847 | else if (i == unchanged_at_top) | |
4848 | unchanged_at_top++; | |
5f5c8ee5 | 4849 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
4850 | } |
4851 | ||
4852 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
daf01701 | 4853 | if ((!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4854 | && changed_lines < baud_rate / 2400) |
7df02016 | 4855 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
4856 | return 1; |
4857 | ||
7df02016 | 4858 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
4859 | - unchanged_at_bottom); |
4860 | ||
daf01701 | 4861 | if (FRAME_SCROLL_REGION_OK (frame)) |
4588ec20 | 4862 | free_at_end_vpos -= unchanged_at_bottom; |
daf01701 | 4863 | else if (FRAME_MEMORY_BELOW_FRAME (frame)) |
4588ec20 JB |
4864 | free_at_end_vpos = -1; |
4865 | ||
4866 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 4867 | current frame and desired frame, don't bother with i/d calc. */ |
daf01701 | 4868 | if (!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4869 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
4870 | && (window_size >= |
4871 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 4872 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
4873 | old_hash, new_hash, draw_cost))) |
4874 | return 0; | |
4875 | ||
5f5c8ee5 GM |
4876 | if (window_size < 2) |
4877 | return 0; | |
4878 | ||
502b9b64 | 4879 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 4880 | draw_cost + unchanged_at_top - 1, |
190bb91a | 4881 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
4882 | old_hash + unchanged_at_top - 1, |
4883 | new_hash + unchanged_at_top - 1, | |
4884 | free_at_end_vpos - unchanged_at_top); | |
4885 | ||
4886 | return 0; | |
4887 | } | |
4588ec20 | 4888 | |
4588ec20 | 4889 | |
5f5c8ee5 GM |
4890 | /* Count the number of blanks at the start of the vector of glyphs R |
4891 | which is LEN glyphs long. */ | |
4588ec20 | 4892 | |
4588ec20 | 4893 | static int |
971de7fb | 4894 | count_blanks (struct glyph *r, int len) |
4588ec20 | 4895 | { |
5f5c8ee5 | 4896 | int i; |
177c0ea7 | 4897 | |
5f5c8ee5 GM |
4898 | for (i = 0; i < len; ++i) |
4899 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
4900 | break; | |
4901 | ||
4902 | return i; | |
4588ec20 JB |
4903 | } |
4904 | ||
5f5c8ee5 GM |
4905 | |
4906 | /* Count the number of glyphs in common at the start of the glyph | |
4907 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
4908 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
4909 | ||
4588ec20 | 4910 | static int |
971de7fb | 4911 | count_match (struct glyph *str1, struct glyph *end1, struct glyph *str2, struct glyph *end2) |
4588ec20 | 4912 | { |
5f5c8ee5 GM |
4913 | struct glyph *p1 = str1; |
4914 | struct glyph *p2 = str2; | |
177c0ea7 | 4915 | |
5f5c8ee5 GM |
4916 | while (p1 < end1 |
4917 | && p2 < end2 | |
42186983 | 4918 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 4919 | ++p1, ++p2; |
177c0ea7 | 4920 | |
5f5c8ee5 | 4921 | return p1 - str1; |
4588ec20 JB |
4922 | } |
4923 | ||
5f5c8ee5 | 4924 | |
4588ec20 | 4925 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 4926 | |
5e617bc2 | 4927 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS ((f))]) |
4588ec20 | 4928 | |
5f5c8ee5 GM |
4929 | |
4930 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
4931 | ||
4588ec20 | 4932 | static void |
971de7fb | 4933 | update_frame_line (struct frame *f, int vpos) |
4588ec20 | 4934 | { |
5f5c8ee5 | 4935 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
4936 | int tem; |
4937 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
4938 | struct glyph_matrix *current_matrix = f->current_matrix; |
4939 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
4940 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
4941 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
59ea14cd PE |
4942 | bool must_write_whole_line_p; |
4943 | bool write_spaces_p = FRAME_MUST_WRITE_SPACES (f); | |
4944 | bool colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background | |
4945 | != FACE_TTY_DEFAULT_BG_COLOR); | |
0a894bad GM |
4946 | |
4947 | if (colored_spaces_p) | |
4948 | write_spaces_p = 1; | |
5f5c8ee5 | 4949 | |
26c63686 GM |
4950 | /* Current row not enabled means it has unknown contents. We must |
4951 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
4952 | must_write_whole_line_p = !current_row->enabled_p; |
4953 | if (must_write_whole_line_p) | |
4588ec20 | 4954 | { |
5f5c8ee5 | 4955 | obody = 0; |
4588ec20 JB |
4956 | olen = 0; |
4957 | } | |
4958 | else | |
4959 | { | |
5f5c8ee5 GM |
4960 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
4961 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 4962 | |
4cecaab8 MB |
4963 | /* Ignore trailing spaces, if we can. */ |
4964 | if (!write_spaces_p) | |
4965 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
4966 | olen--; | |
4588ec20 JB |
4967 | } |
4968 | ||
5f5c8ee5 GM |
4969 | current_row->enabled_p = 1; |
4970 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 4971 | |
5f5c8ee5 GM |
4972 | /* If desired line is empty, just clear the line. */ |
4973 | if (!desired_row->enabled_p) | |
4588ec20 JB |
4974 | { |
4975 | nlen = 0; | |
4976 | goto just_erase; | |
4977 | } | |
4978 | ||
5f5c8ee5 GM |
4979 | nbody = desired_row->glyphs[TEXT_AREA]; |
4980 | nlen = desired_row->used[TEXT_AREA]; | |
4981 | nend = nbody + nlen; | |
4982 | ||
4983 | /* If display line has unknown contents, write the whole line. */ | |
4984 | if (must_write_whole_line_p) | |
4985 | { | |
26c63686 | 4986 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 4987 | if (!write_spaces_p) |
74ca462f GM |
4988 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
4989 | --nlen; | |
4990 | ||
26c63686 | 4991 | /* Write the contents of the desired line. */ |
74ca462f | 4992 | if (nlen) |
26c63686 | 4993 | { |
385ed61f KL |
4994 | cursor_to (f, vpos, 0); |
4995 | write_glyphs (f, nbody, nlen); | |
26c63686 | 4996 | } |
177c0ea7 | 4997 | |
26c63686 GM |
4998 | /* Don't call clear_end_of_line if we already wrote the whole |
4999 | line. The cursor will not be at the right margin in that | |
5000 | case but in the line below. */ | |
7df02016 | 5001 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 | 5002 | { |
385ed61f KL |
5003 | cursor_to (f, vpos, nlen); |
5004 | clear_end_of_line (f, FRAME_TOTAL_COLS (f)); | |
26c63686 | 5005 | } |
58827478 GM |
5006 | else |
5007 | /* Make sure we are in the right row, otherwise cursor movement | |
5008 | with cmgoto might use `ch' in the wrong row. */ | |
385ed61f | 5009 | cursor_to (f, vpos, 0); |
177c0ea7 | 5010 | |
5f5c8ee5 GM |
5011 | make_current (desired_matrix, current_matrix, vpos); |
5012 | return; | |
5013 | } | |
4588ec20 JB |
5014 | |
5015 | /* Pretend trailing spaces are not there at all, | |
5016 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
5017 | if (!write_spaces_p) |
5018 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
5019 | nlen--; | |
4588ec20 JB |
5020 | |
5021 | /* If there's no i/d char, quickly do the best we can without it. */ | |
daf01701 | 5022 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
4588ec20 | 5023 | { |
5f5c8ee5 | 5024 | int i, j; |
4588ec20 | 5025 | |
5f5c8ee5 GM |
5026 | /* Find the first glyph in desired row that doesn't agree with |
5027 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
5028 | for (i = 0; i < nlen; i++) |
5029 | { | |
5f5c8ee5 | 5030 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 5031 | { |
5f5c8ee5 GM |
5032 | /* Find the end of the run of different glyphs. */ |
5033 | j = i + 1; | |
5034 | while (j < nlen | |
5035 | && (j >= olen | |
5036 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
5037 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
5038 | ++j; | |
177c0ea7 JB |
5039 | |
5040 | /* Output this run of non-matching chars. */ | |
385ed61f KL |
5041 | cursor_to (f, vpos, i); |
5042 | write_glyphs (f, nbody + i, j - i); | |
5f5c8ee5 | 5043 | i = j - 1; |
4588ec20 JB |
5044 | |
5045 | /* Now find the next non-match. */ | |
5046 | } | |
5047 | } | |
5048 | ||
5049 | /* Clear the rest of the line, or the non-clear part of it. */ | |
5050 | if (olen > nlen) | |
5051 | { | |
385ed61f KL |
5052 | cursor_to (f, vpos, nlen); |
5053 | clear_end_of_line (f, olen); | |
4588ec20 JB |
5054 | } |
5055 | ||
5f5c8ee5 GM |
5056 | /* Make current row = desired row. */ |
5057 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
5058 | return; |
5059 | } | |
5060 | ||
5f5c8ee5 GM |
5061 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
5062 | characters in a row. */ | |
5063 | ||
4588ec20 JB |
5064 | if (!olen) |
5065 | { | |
5f5c8ee5 GM |
5066 | /* If current line is blank, skip over initial spaces, if |
5067 | possible, and write the rest. */ | |
4cecaab8 | 5068 | if (write_spaces_p) |
5f5c8ee5 GM |
5069 | nsp = 0; |
5070 | else | |
5071 | nsp = count_blanks (nbody, nlen); | |
5072 | ||
4588ec20 JB |
5073 | if (nlen > nsp) |
5074 | { | |
385ed61f KL |
5075 | cursor_to (f, vpos, nsp); |
5076 | write_glyphs (f, nbody + nsp, nlen - nsp); | |
4588ec20 JB |
5077 | } |
5078 | ||
502b9b64 | 5079 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 5080 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
5081 | return; |
5082 | } | |
5083 | ||
4588ec20 | 5084 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 5085 | osp = count_blanks (obody, olen); |
4cecaab8 | 5086 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 5087 | |
5f5c8ee5 GM |
5088 | /* Compute number of matching chars starting with first non-blank. */ |
5089 | begmatch = count_match (obody + osp, obody + olen, | |
5090 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
5091 | |
5092 | /* Spaces in new match implicit space past the end of old. */ | |
5093 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 5094 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
5095 | { |
5096 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
5097 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
5098 | ++begmatch; | |
4588ec20 JB |
5099 | } |
5100 | ||
5101 | /* Avoid doing insert/delete char | |
5102 | just cause number of leading spaces differs | |
5f5c8ee5 | 5103 | when the following text does not match. */ |
4588ec20 JB |
5104 | if (begmatch == 0 && osp != nsp) |
5105 | osp = nsp = min (osp, nsp); | |
5106 | ||
5107 | /* Find matching characters at end of line */ | |
5108 | op1 = obody + olen; | |
5109 | np1 = nbody + nlen; | |
5110 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
5111 | while (op1 > op2 |
5112 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
5113 | { |
5114 | op1--; | |
5115 | np1--; | |
5116 | } | |
5117 | endmatch = obody + olen - op1; | |
5118 | ||
4588ec20 JB |
5119 | /* tem gets the distance to insert or delete. |
5120 | endmatch is how many characters we save by doing so. | |
5121 | Is it worth it? */ | |
5122 | ||
5123 | tem = (nlen - nsp) - (olen - osp); | |
5124 | if (endmatch && tem | |
daf01701 | 5125 | && (!FRAME_CHAR_INS_DEL_OK (f) |
8a56675d | 5126 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
5127 | endmatch = 0; |
5128 | ||
5129 | /* nsp - osp is the distance to insert or delete. | |
5130 | If that is nonzero, begmatch is known to be nonzero also. | |
5131 | begmatch + endmatch is how much we save by doing the ins/del. | |
5132 | Is it worth it? */ | |
5133 | ||
5134 | if (nsp != osp | |
daf01701 | 5135 | && (!FRAME_CHAR_INS_DEL_OK (f) |
c363a1d6 | 5136 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
5137 | { |
5138 | begmatch = 0; | |
5139 | endmatch = 0; | |
5140 | osp = nsp = min (osp, nsp); | |
5141 | } | |
5142 | ||
5143 | /* Now go through the line, inserting, writing and | |
5144 | deleting as appropriate. */ | |
5145 | ||
5146 | if (osp > nsp) | |
5147 | { | |
385ed61f KL |
5148 | cursor_to (f, vpos, nsp); |
5149 | delete_glyphs (f, osp - nsp); | |
4588ec20 JB |
5150 | } |
5151 | else if (nsp > osp) | |
5152 | { | |
5153 | /* If going to delete chars later in line | |
5154 | and insert earlier in the line, | |
5155 | must delete first to avoid losing data in the insert */ | |
5156 | if (endmatch && nlen < olen + nsp - osp) | |
5157 | { | |
385ed61f KL |
5158 | cursor_to (f, vpos, nlen - endmatch + osp - nsp); |
5159 | delete_glyphs (f, olen + nsp - osp - nlen); | |
4588ec20 JB |
5160 | olen = nlen - (nsp - osp); |
5161 | } | |
385ed61f KL |
5162 | cursor_to (f, vpos, osp); |
5163 | insert_glyphs (f, 0, nsp - osp); | |
4588ec20 JB |
5164 | } |
5165 | olen += nsp - osp; | |
5166 | ||
5167 | tem = nsp + begmatch + endmatch; | |
5168 | if (nlen != tem || olen != tem) | |
5169 | { | |
4588ec20 JB |
5170 | if (!endmatch || nlen == olen) |
5171 | { | |
c363a1d6 GM |
5172 | /* If new text being written reaches right margin, there is |
5173 | no need to do clear-to-eol at the end of this function | |
5174 | (and it would not be safe, since cursor is not going to | |
5175 | be "at the margin" after the text is done). */ | |
7df02016 | 5176 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 5177 | olen = 0; |
c363a1d6 GM |
5178 | |
5179 | /* Function write_glyphs is prepared to do nothing | |
5180 | if passed a length <= 0. Check it here to avoid | |
5181 | unnecessary cursor movement. */ | |
5182 | if (nlen - tem > 0) | |
5183 | { | |
385ed61f KL |
5184 | cursor_to (f, vpos, nsp + begmatch); |
5185 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
c363a1d6 | 5186 | } |
4588ec20 JB |
5187 | } |
5188 | else if (nlen > olen) | |
5189 | { | |
24e86043 KH |
5190 | /* Here, we used to have the following simple code: |
5191 | ---------------------------------------- | |
5192 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
5193 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
5194 | ---------------------------------------- | |
5195 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
5196 | is a padding glyph. */ | |
5197 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
5198 | int del; | |
5f5c8ee5 | 5199 | |
385ed61f | 5200 | cursor_to (f, vpos, nsp + begmatch); |
177c0ea7 | 5201 | |
5f5c8ee5 | 5202 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
5203 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
5204 | out--; | |
385ed61f | 5205 | write_glyphs (f, nbody + nsp + begmatch, out); |
177c0ea7 | 5206 | |
5f5c8ee5 GM |
5207 | /* If we left columns to be overwritten, we must delete them. */ |
5208 | del = olen - tem - out; | |
c363a1d6 | 5209 | if (del > 0) |
385ed61f | 5210 | delete_glyphs (f, del); |
177c0ea7 | 5211 | |
5f5c8ee5 | 5212 | /* At last, we insert columns not yet written out. */ |
385ed61f | 5213 | insert_glyphs (f, nbody + nsp + begmatch + out, nlen - olen + del); |
5f5c8ee5 GM |
5214 | olen = nlen; |
5215 | } | |
5216 | else if (olen > nlen) | |
5217 | { | |
385ed61f KL |
5218 | cursor_to (f, vpos, nsp + begmatch); |
5219 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
5220 | delete_glyphs (f, olen - nlen); | |
5f5c8ee5 GM |
5221 | olen = nlen; |
5222 | } | |
bd9e3e75 | 5223 | } |
5f5c8ee5 GM |
5224 | |
5225 | just_erase: | |
5226 | /* If any unerased characters remain after the new line, erase them. */ | |
5227 | if (olen > nlen) | |
078b3696 | 5228 | { |
385ed61f KL |
5229 | cursor_to (f, vpos, nlen); |
5230 | clear_end_of_line (f, olen); | |
078b3696 | 5231 | } |
5f5c8ee5 GM |
5232 | |
5233 | /* Exchange contents between current_frame and new_frame. */ | |
5234 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5235 | } |
5f5c8ee5 GM |
5236 | |
5237 | ||
078b3696 | 5238 | \f |
5f5c8ee5 GM |
5239 | /*********************************************************************** |
5240 | X/Y Position -> Buffer Position | |
5241 | ***********************************************************************/ | |
5242 | ||
a1b0a6db | 5243 | /* Determine what's under window-relative pixel position (*X, *Y). |
2396cbba | 5244 | Return the OBJECT (string or buffer) that's there. |
6b61353c | 5245 | Return in *POS the position in that object. |
2396cbba EZ |
5246 | Adjust *X and *Y to character positions. |
5247 | Return in *DX and *DY the pixel coordinates of the click, | |
5248 | relative to the top left corner of OBJECT, or relative to | |
5249 | the top left corner of the character glyph at (*X, *Y) | |
5250 | if OBJECT is nil. | |
5251 | Return WIDTH and HEIGHT of the object at (*X, *Y), or zero | |
5252 | if the coordinates point to an empty area of the display. */ | |
5f5c8ee5 | 5253 | |
6b61353c | 5254 | Lisp_Object |
971de7fb | 5255 | 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 | 5256 | { |
5f5c8ee5 | 5257 | struct it it; |
707ea971 | 5258 | Lisp_Object old_current_buffer = Fcurrent_buffer (); |
5f5c8ee5 | 5259 | struct text_pos startp; |
6b61353c KH |
5260 | Lisp_Object string; |
5261 | struct glyph_row *row; | |
cedd7cd9 KS |
5262 | #ifdef HAVE_WINDOW_SYSTEM |
5263 | struct image *img = 0; | |
5264 | #endif | |
2396cbba | 5265 | int x0, x1, to_x; |
57b3e30b | 5266 | void *itdata = NULL; |
5f5c8ee5 | 5267 | |
707ea971 CY |
5268 | /* We used to set current_buffer directly here, but that does the |
5269 | wrong thing with `face-remapping-alist' (bug#2044). */ | |
d3d50620 | 5270 | Fset_buffer (w->buffer); |
57b3e30b | 5271 | itdata = bidi_shelve_cache (); |
d3d50620 | 5272 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
5f5c8ee5 GM |
5273 | CHARPOS (startp) = min (ZV, max (BEGV, CHARPOS (startp))); |
5274 | BYTEPOS (startp) = min (ZV_BYTE, max (BEGV_BYTE, BYTEPOS (startp))); | |
5275 | start_display (&it, w, startp); | |
352ec8ff EZ |
5276 | /* start_display takes into account the header-line row, but IT's |
5277 | vpos still counts from the glyph row that includes the window's | |
5278 | start position. Adjust for a possible header-line row. */ | |
59ea14cd | 5279 | it.vpos += WINDOW_WANTS_HEADER_LINE_P (w); |
177c0ea7 | 5280 | |
9173a8fb | 5281 | x0 = *x; |
2396cbba EZ |
5282 | |
5283 | /* First, move to the beginning of the row corresponding to *Y. We | |
5284 | need to be in that row to get the correct value of base paragraph | |
40629f17 | 5285 | direction for the text at (*X, *Y). */ |
2396cbba EZ |
5286 | move_it_to (&it, -1, 0, *y, -1, MOVE_TO_X | MOVE_TO_Y); |
5287 | ||
5288 | /* TO_X is the pixel position that the iterator will compute for the | |
40629f17 EZ |
5289 | glyph at *X. We add it.first_visible_x because iterator |
5290 | positions include the hscroll. */ | |
2396cbba EZ |
5291 | to_x = x0 + it.first_visible_x; |
5292 | if (it.bidi_it.paragraph_dir == R2L) | |
5293 | /* For lines in an R2L paragraph, we need to mirror TO_X wrt the | |
5294 | text area. This is because the iterator, even in R2L | |
5295 | paragraphs, delivers glyphs as if they started at the left | |
5296 | margin of the window. (When we actually produce glyphs for | |
5297 | display, we reverse their order in PRODUCE_GLYPHS, but the | |
5298 | iterator doesn't know about that.) The following line adjusts | |
5299 | the pixel position to the iterator geometry, which is what | |
40629f17 EZ |
5300 | move_it_* routines use. (The -1 is because in a window whose |
5301 | text-area width is W, the rightmost pixel position is W-1, and | |
5302 | it should be mirrored into zero pixel position.) */ | |
5303 | to_x = window_box_width (w, TEXT_AREA) - to_x - 1; | |
5304 | ||
5305 | /* Now move horizontally in the row to the glyph under *X. Second | |
5306 | argument is ZV to prevent move_it_in_display_line from matching | |
5307 | based on buffer positions. */ | |
2396cbba | 5308 | move_it_in_display_line (&it, ZV, to_x, MOVE_TO_X); |
35928349 | 5309 | bidi_unshelve_cache (itdata, 0); |
177c0ea7 | 5310 | |
707ea971 | 5311 | Fset_buffer (old_current_buffer); |
a1b0a6db | 5312 | |
6b61353c KH |
5313 | *dx = x0 + it.first_visible_x - it.current_x; |
5314 | *dy = *y - it.current_y; | |
5315 | ||
d3d50620 | 5316 | string = w->buffer; |
6b61353c KH |
5317 | if (STRINGP (it.string)) |
5318 | string = it.string; | |
a1b0a6db | 5319 | *pos = it.current; |
86282aab KH |
5320 | if (it.what == IT_COMPOSITION |
5321 | && it.cmp_it.nchars > 1 | |
5322 | && it.cmp_it.reversed_p) | |
5323 | { | |
5324 | /* The current display element is a grapheme cluster in a | |
5325 | composition. In that case, we need the position of the first | |
5326 | character of the cluster. But, as it.cmp_it.reversed_p is 1, | |
5327 | it.current points to the last character of the cluster, thus | |
5328 | we must move back to the first character of the same | |
5329 | cluster. */ | |
5330 | CHARPOS (pos->pos) -= it.cmp_it.nchars - 1; | |
5331 | if (STRINGP (it.string)) | |
5332 | BYTEPOS (pos->pos) = string_char_to_byte (string, CHARPOS (pos->pos)); | |
5333 | else | |
d3d50620 | 5334 | BYTEPOS (pos->pos) = buf_charpos_to_bytepos (XBUFFER (w->buffer), |
425cc014 | 5335 | CHARPOS (pos->pos)); |
86282aab | 5336 | } |
6b61353c KH |
5337 | |
5338 | #ifdef HAVE_WINDOW_SYSTEM | |
5339 | if (it.what == IT_IMAGE) | |
5340 | { | |
6b61353c KH |
5341 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5342 | && !NILP (img->spec)) | |
5343 | *object = img->spec; | |
5344 | } | |
5345 | #endif | |
5346 | ||
b70d98e1 KS |
5347 | if (it.vpos < w->current_matrix->nrows |
5348 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5349 | row->enabled_p)) | |
6b61353c KH |
5350 | { |
5351 | if (it.hpos < row->used[TEXT_AREA]) | |
5352 | { | |
5353 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6b61353c | 5354 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5355 | if (img) |
5356 | { | |
5357 | *dy -= row->ascent - glyph->ascent; | |
4be9765d KH |
5358 | *dx += glyph->slice.img.x; |
5359 | *dy += glyph->slice.img.y; | |
cedd7cd9 KS |
5360 | /* Image slices positions are still relative to the entire image */ |
5361 | *width = img->width; | |
5362 | *height = img->height; | |
5363 | } | |
5364 | else | |
6b61353c | 5365 | #endif |
cedd7cd9 KS |
5366 | { |
5367 | *width = glyph->pixel_width; | |
5368 | *height = glyph->ascent + glyph->descent; | |
5369 | } | |
6b61353c KH |
5370 | } |
5371 | else | |
5372 | { | |
5373 | *width = 0; | |
5374 | *height = row->height; | |
5375 | } | |
5376 | } | |
5377 | else | |
5378 | { | |
5379 | *width = *height = 0; | |
5380 | } | |
5381 | ||
5382 | /* Add extra (default width) columns if clicked after EOL. */ | |
5e617bc2 | 5383 | x1 = max (0, it.current_x + it.pixel_width - it.first_visible_x); |
6b61353c KH |
5384 | if (x0 > x1) |
5385 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5386 | ||
5387 | *x = it.hpos; | |
5388 | *y = it.vpos; | |
5389 | ||
5390 | return string; | |
5f5c8ee5 | 5391 | } |
4588ec20 | 5392 | |
5f5c8ee5 GM |
5393 | |
5394 | /* Value is the string under window-relative coordinates X/Y in the | |
6b61353c KH |
5395 | mode line or header line (PART says which) of window W, or nil if none. |
5396 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
5397 | |
5398 | Lisp_Object | |
ace1712c | 5399 | mode_line_string (struct window *w, enum window_part part, |
d311d28c | 5400 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5401 | int *dx, int *dy, int *width, int *height) |
5f5c8ee5 GM |
5402 | { |
5403 | struct glyph_row *row; | |
5404 | struct glyph *glyph, *end; | |
6b61353c | 5405 | int x0, y0; |
5f5c8ee5 GM |
5406 | Lisp_Object string = Qnil; |
5407 | ||
641bdbf3 | 5408 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
5409 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
5410 | else | |
045dee35 | 5411 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
6b61353c KH |
5412 | y0 = *y - row->y; |
5413 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
5f5c8ee5 GM |
5414 | |
5415 | if (row->mode_line_p && row->enabled_p) | |
4588ec20 | 5416 | { |
5f5c8ee5 GM |
5417 | /* Find the glyph under X. If we find one with a string object, |
5418 | it's the one we were looking for. */ | |
5419 | glyph = row->glyphs[TEXT_AREA]; | |
5420 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 5421 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5422 | x0 -= glyph->pixel_width; |
5423 | *x = glyph - row->glyphs[TEXT_AREA]; | |
5424 | if (glyph < end) | |
5425 | { | |
5426 | string = glyph->object; | |
5427 | *charpos = glyph->charpos; | |
5428 | *width = glyph->pixel_width; | |
5429 | *height = glyph->ascent + glyph->descent; | |
5430 | #ifdef HAVE_WINDOW_SYSTEM | |
5431 | if (glyph->type == IMAGE_GLYPH) | |
5432 | { | |
5433 | struct image *img; | |
5434 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5435 | if (img != NULL) | |
5436 | *object = img->spec; | |
5437 | y0 -= row->ascent - glyph->ascent; | |
5438 | } | |
5439 | #endif | |
5440 | } | |
5441 | else | |
5442 | { | |
5443 | /* Add extra (default width) columns if clicked after EOL. */ | |
5444 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5445 | *width = 0; | |
5446 | *height = row->height; | |
5447 | } | |
5448 | } | |
5449 | else | |
5450 | { | |
5451 | *x = 0; | |
5452 | x0 = 0; | |
5453 | *width = *height = 0; | |
4588ec20 | 5454 | } |
5f5c8ee5 | 5455 | |
6b61353c KH |
5456 | *dx = x0; |
5457 | *dy = y0; | |
5458 | ||
5f5c8ee5 | 5459 | return string; |
4588ec20 | 5460 | } |
5f5c8ee5 GM |
5461 | |
5462 | ||
db1db309 GM |
5463 | /* Value is the string under window-relative coordinates X/Y in either |
5464 | marginal area, or nil if none. *CHARPOS is set to the position in | |
5465 | the string returned. */ | |
5466 | ||
5467 | Lisp_Object | |
ace1712c | 5468 | marginal_area_string (struct window *w, enum window_part part, |
d311d28c | 5469 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5470 | int *dx, int *dy, int *width, int *height) |
db1db309 GM |
5471 | { |
5472 | struct glyph_row *row = w->current_matrix->rows; | |
5473 | struct glyph *glyph, *end; | |
6b61353c | 5474 | int x0, y0, i, wy = *y; |
641bdbf3 | 5475 | int area; |
db1db309 GM |
5476 | Lisp_Object string = Qnil; |
5477 | ||
641bdbf3 | 5478 | if (part == ON_LEFT_MARGIN) |
db1db309 | 5479 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 5480 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
5481 | area = RIGHT_MARGIN_AREA; |
5482 | else | |
1088b922 | 5483 | emacs_abort (); |
db1db309 GM |
5484 | |
5485 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
5486 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
5487 | break; | |
6b61353c KH |
5488 | y0 = *y - row->y; |
5489 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
db1db309 GM |
5490 | |
5491 | if (row->enabled_p) | |
5492 | { | |
5493 | /* Find the glyph under X. If we find one with a string object, | |
5494 | it's the one we were looking for. */ | |
db1db309 | 5495 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 5496 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5497 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5498 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) |
5499 | + window_box_width (w, LEFT_MARGIN_AREA) | |
5500 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 5501 | else |
7df02016 | 5502 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5503 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5504 | : 0); |
5505 | ||
6b61353c KH |
5506 | glyph = row->glyphs[area]; |
5507 | end = glyph + row->used[area]; | |
cfde341f | 5508 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5509 | x0 -= glyph->pixel_width; |
5510 | *x = glyph - row->glyphs[area]; | |
5511 | if (glyph < end) | |
5512 | { | |
5513 | string = glyph->object; | |
5514 | *charpos = glyph->charpos; | |
5515 | *width = glyph->pixel_width; | |
5516 | *height = glyph->ascent + glyph->descent; | |
5517 | #ifdef HAVE_WINDOW_SYSTEM | |
5518 | if (glyph->type == IMAGE_GLYPH) | |
5519 | { | |
5520 | struct image *img; | |
5521 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5522 | if (img != NULL) | |
5523 | *object = img->spec; | |
5524 | y0 -= row->ascent - glyph->ascent; | |
4be9765d KH |
5525 | x0 += glyph->slice.img.x; |
5526 | y0 += glyph->slice.img.y; | |
6b61353c KH |
5527 | } |
5528 | #endif | |
5529 | } | |
5530 | else | |
5531 | { | |
5532 | /* Add extra (default width) columns if clicked after EOL. */ | |
5533 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5534 | *width = 0; | |
5535 | *height = row->height; | |
5536 | } | |
db1db309 | 5537 | } |
6b61353c KH |
5538 | else |
5539 | { | |
5540 | x0 = 0; | |
5541 | *x = 0; | |
5542 | *width = *height = 0; | |
5543 | } | |
5544 | ||
5545 | *dx = x0; | |
5546 | *dy = y0; | |
db1db309 GM |
5547 | |
5548 | return string; | |
5549 | } | |
5550 | ||
5551 | ||
5f5c8ee5 GM |
5552 | /*********************************************************************** |
5553 | Changing Frame Sizes | |
5554 | ***********************************************************************/ | |
4588ec20 JB |
5555 | |
5556 | #ifdef SIGWINCH | |
5f5c8ee5 | 5557 | |
20ef56db PE |
5558 | static void deliver_window_change_signal (int); |
5559 | ||
9af30bdf | 5560 | static void |
20ef56db | 5561 | handle_window_change_signal (int sig) |
4588ec20 JB |
5562 | { |
5563 | int width, height; | |
28d7d09f | 5564 | struct tty_display_info *tty; |
4d553a13 | 5565 | |
9628b887 KL |
5566 | /* The frame size change obviously applies to a single |
5567 | termcap-controlled terminal, but we can't decide which. | |
5568 | Therefore, we resize the frames corresponding to each tty. | |
9628b887 KL |
5569 | */ |
5570 | for (tty = tty_list; tty; tty = tty->next) { | |
4588ec20 | 5571 | |
0a125897 KL |
5572 | if (! tty->term_initted) |
5573 | continue; | |
4588ec20 | 5574 | |
db878925 DN |
5575 | /* Suspended tty frames have tty->input == NULL avoid trying to |
5576 | use it. */ | |
5577 | if (!tty->input) | |
5578 | continue; | |
5579 | ||
0b0d3e0b | 5580 | get_tty_size (fileno (tty->input), &width, &height); |
3fc809e2 | 5581 | |
bedeffcf | 5582 | if (width > 5 && height > 2) { |
9628b887 | 5583 | Lisp_Object tail, frame; |
3fc809e2 | 5584 | |
9628b887 | 5585 | FOR_EACH_FRAME (tail, frame) |
4d553a13 KL |
5586 | if (FRAME_TERMCAP_P (XFRAME (frame)) && FRAME_TTY (XFRAME (frame)) == tty) |
5587 | /* Record the new sizes, but don't reallocate the data | |
5588 | structures now. Let that be done later outside of the | |
5589 | signal handler. */ | |
5590 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); | |
9628b887 | 5591 | } |
4588ec20 | 5592 | } |
20ef56db | 5593 | } |
3fc809e2 | 5594 | |
20ef56db PE |
5595 | static void |
5596 | deliver_window_change_signal (int sig) | |
5597 | { | |
4d7e6e51 | 5598 | deliver_process_signal (sig, handle_window_change_signal); |
4588ec20 JB |
5599 | } |
5600 | #endif /* SIGWINCH */ | |
5601 | ||
5602 | ||
59ea14cd PE |
5603 | /* Do any change in frame size that was requested by a signal. |
5604 | SAFE means this function is called from a place where it is | |
5605 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 5606 | |
dfcf069d | 5607 | void |
59ea14cd | 5608 | do_pending_window_change (bool safe) |
4588ec20 | 5609 | { |
20ef56db | 5610 | /* If window change signal handler should have run before, run it now. */ |
b96fd3e8 GM |
5611 | if (redisplaying_p && !safe) |
5612 | return; | |
177c0ea7 | 5613 | |
4588ec20 JB |
5614 | while (delayed_size_change) |
5615 | { | |
35f56f96 | 5616 | Lisp_Object tail, frame; |
4588ec20 JB |
5617 | |
5618 | delayed_size_change = 0; | |
5619 | ||
35f56f96 | 5620 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5621 | { |
5f5c8ee5 | 5622 | struct frame *f = XFRAME (frame); |
35f56f96 | 5623 | |
7df02016 KS |
5624 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
5625 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
5626 | 0, 0, safe); | |
4588ec20 JB |
5627 | } |
5628 | } | |
5629 | } | |
5630 | ||
5631 | ||
502b9b64 | 5632 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 5633 | indicate no change is to take place. |
4588ec20 | 5634 | |
59ea14cd PE |
5635 | If DELAY, assume we're being called from a signal handler, and |
5636 | queue the change for later - perhaps the next redisplay. | |
5637 | Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
5638 | from a signal handler. |
5639 | ||
59ea14cd | 5640 | SAFE means this function is called from a place where it's |
b96fd3e8 | 5641 | safe to change frame sizes while a redisplay is in progress. */ |
b6a65ac2 | 5642 | |
dfcf069d | 5643 | void |
59ea14cd PE |
5644 | change_frame_size (struct frame *f, int newheight, int newwidth, |
5645 | bool pretend, bool delay, bool safe) | |
45140e01 RS |
5646 | { |
5647 | Lisp_Object tail, frame; | |
3826ea1a | 5648 | |
9628b887 | 5649 | if (FRAME_MSDOS_P (f)) |
45140e01 | 5650 | { |
9628b887 KL |
5651 | /* On MS-DOS, all frames use the same screen, so a change in |
5652 | size affects all frames. Termcap now supports multiple | |
5653 | ttys. */ | |
45140e01 | 5654 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 5655 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 5656 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 5657 | pretend, delay, safe); |
45140e01 RS |
5658 | } |
5659 | else | |
b96fd3e8 | 5660 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
5661 | } |
5662 | ||
5663 | static void | |
59ea14cd PE |
5664 | change_frame_size_1 (struct frame *f, int newheight, int newwidth, |
5665 | bool pretend, bool delay, bool safe) | |
4588ec20 | 5666 | { |
7df02016 | 5667 | int new_frame_total_cols; |
d311d28c | 5668 | ptrdiff_t count = SPECPDL_INDEX (); |
3826ea1a | 5669 | |
4588ec20 | 5670 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 5671 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 5672 | { |
7df02016 KS |
5673 | f->new_text_lines = newheight; |
5674 | f->new_text_cols = newwidth; | |
4588ec20 JB |
5675 | delayed_size_change = 1; |
5676 | return; | |
5677 | } | |
5678 | ||
502b9b64 | 5679 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
5680 | f->new_text_lines = 0; |
5681 | f->new_text_cols = 0; | |
b6a65ac2 | 5682 | |
08f7aa3e | 5683 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 5684 | if (newheight == 0) |
7df02016 | 5685 | newheight = FRAME_LINES (f); |
ae19c6f2 | 5686 | if (newwidth == 0) |
7df02016 | 5687 | newwidth = FRAME_COLS (f); |
3826ea1a | 5688 | |
3b95a6f9 | 5689 | /* Compute width of windows in F. */ |
b6a65ac2 | 5690 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 5691 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 | 5692 | |
3b95a6f9 MR |
5693 | /* This is the width of the frame with vertical scroll bars and fringe |
5694 | columns. Do this after rounding - see discussion of bug#9723. */ | |
5695 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); | |
5696 | ||
b6a65ac2 | 5697 | /* If we're not changing the frame size, quit now. */ |
3b95a6f9 MR |
5698 | /* Frame width may be unchanged but the text portion may change, for |
5699 | example, fullscreen and remove/add scroll bar. */ | |
7df02016 | 5700 | if (newheight == FRAME_LINES (f) |
3b95a6f9 MR |
5701 | /* Text portion unchanged? */ |
5702 | && newwidth == FRAME_COLS (f) | |
5703 | /* Frame width unchanged? */ | |
5704 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) | |
4588ec20 JB |
5705 | return; |
5706 | ||
4d7e6e51 | 5707 | block_input (); |
cbb95688 | 5708 | |
886a8a6c KH |
5709 | #ifdef MSDOS |
5710 | /* We only can set screen dimensions to certain values supported | |
5711 | by our video hardware. Try to find the smallest size greater | |
5712 | or equal to the requested dimensions. */ | |
5713 | dos_set_window_size (&newheight, &newwidth); | |
5714 | #endif | |
5715 | ||
7df02016 | 5716 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 5717 | { |
562dd5e9 | 5718 | resize_frame_windows (f, newheight, 0); |
b6a65ac2 | 5719 | |
48e482e6 EZ |
5720 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5721 | manipulating video hardware. */ | |
5722 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5723 | FrameRows (FRAME_TTY (f)) = newheight; |
4588ec20 JB |
5724 | } |
5725 | ||
7df02016 | 5726 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 5727 | { |
562dd5e9 | 5728 | resize_frame_windows (f, new_frame_total_cols, 1); |
4588ec20 | 5729 | |
48e482e6 EZ |
5730 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5731 | manipulating video hardware. */ | |
5732 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5733 | FrameCols (FRAME_TTY (f)) = newwidth; |
5f5c8ee5 | 5734 | |
e69b0960 | 5735 | if (WINDOWP (f->tool_bar_window)) |
e8c17b81 | 5736 | wset_total_cols (XWINDOW (f->tool_bar_window), make_number (newwidth)); |
4588ec20 JB |
5737 | } |
5738 | ||
7df02016 KS |
5739 | FRAME_LINES (f) = newheight; |
5740 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 5741 | |
5f5c8ee5 GM |
5742 | { |
5743 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
5744 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 5745 | |
5f5c8ee5 GM |
5746 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
5747 | &text_area_height); | |
5748 | if (w->cursor.x >= text_area_x + text_area_width) | |
5749 | w->cursor.hpos = w->cursor.x = 0; | |
5750 | if (w->cursor.y >= text_area_y + text_area_height) | |
5751 | w->cursor.vpos = w->cursor.y = 0; | |
5752 | } | |
986e61b8 | 5753 | |
5f5c8ee5 | 5754 | adjust_glyphs (f); |
5f5c8ee5 | 5755 | calculate_costs (f); |
cb02fa39 GM |
5756 | SET_FRAME_GARBAGED (f); |
5757 | f->resized_p = 1; | |
97cf50e7 | 5758 | |
4d7e6e51 | 5759 | unblock_input (); |
61730a69 | 5760 | |
66322887 | 5761 | record_unwind_current_buffer (); |
e523f7e5 | 5762 | |
ef264c42 | 5763 | run_window_configuration_change_hook (f); |
e523f7e5 RS |
5764 | |
5765 | unbind_to (count, Qnil); | |
4588ec20 | 5766 | } |
5f5c8ee5 GM |
5767 | |
5768 | ||
4588ec20 | 5769 | \f |
5f5c8ee5 GM |
5770 | /*********************************************************************** |
5771 | Terminal Related Lisp Functions | |
5772 | ***********************************************************************/ | |
5773 | ||
5774 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 5775 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
5776 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
5777 | FILE = nil means just close any termscript file currently open. */) | |
5842a27b | 5778 | (Lisp_Object file) |
5f5c8ee5 | 5779 | { |
0b0d3e0b KL |
5780 | struct tty_display_info *tty; |
5781 | ||
7d2f1216 EZ |
5782 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ()) |
5783 | && ! FRAME_MSDOS_P (SELECTED_FRAME ())) | |
0b0d3e0b KL |
5784 | error ("Current frame is not on a tty device"); |
5785 | ||
5786 | tty = CURTTY (); | |
5787 | ||
5788 | if (tty->termscript != 0) | |
e18c7093 | 5789 | { |
4d7e6e51 | 5790 | block_input (); |
0b0d3e0b | 5791 | fclose (tty->termscript); |
4d7e6e51 | 5792 | unblock_input (); |
e18c7093 | 5793 | } |
0b0d3e0b | 5794 | tty->termscript = 0; |
5f5c8ee5 GM |
5795 | |
5796 | if (! NILP (file)) | |
5797 | { | |
5798 | file = Fexpand_file_name (file, Qnil); | |
42a5b22f | 5799 | tty->termscript = fopen (SSDATA (file), "w"); |
0b0d3e0b | 5800 | if (tty->termscript == 0) |
5f5c8ee5 GM |
5801 | report_file_error ("Opening termscript", Fcons (file, Qnil)); |
5802 | } | |
5803 | return Qnil; | |
5804 | } | |
5805 | ||
5806 | ||
4588ec20 | 5807 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
62af879c | 5808 | Ssend_string_to_terminal, 1, 2, 0, |
7ee72033 | 5809 | doc: /* Send STRING to the terminal without alteration. |
62af879c KL |
5810 | Control characters in STRING will have terminal-dependent effects. |
5811 | ||
6ed8eeff | 5812 | Optional parameter TERMINAL specifies the tty terminal device to use. |
558759e4 AM |
5813 | It may be a terminal object, a frame, or nil for the terminal used by |
5814 | the currently selected frame. In batch mode, STRING is sent to stdout | |
5815 | when TERMINAL is nil. */) | |
5842a27b | 5816 | (Lisp_Object string, Lisp_Object terminal) |
4588ec20 | 5817 | { |
7cef7ce3 SM |
5818 | struct terminal *t = get_terminal (terminal, 1); |
5819 | FILE *out; | |
0b0d3e0b | 5820 | |
94f3db62 | 5821 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 5822 | CHECK_STRING (string); |
4d7e6e51 | 5823 | block_input (); |
0b0d3e0b | 5824 | |
6ed8eeff KL |
5825 | if (!t) |
5826 | error ("Unknown terminal device"); | |
0b0d3e0b | 5827 | |
7cef7ce3 SM |
5828 | if (t->type == output_initial) |
5829 | out = stdout; | |
5830 | else if (t->type != output_termcap && t->type != output_msdos_raw) | |
5831 | error ("Device %d is not a termcap terminal device", t->id); | |
5832 | else | |
5833 | { | |
5834 | struct tty_display_info *tty = t->display_info.tty; | |
3fc809e2 | 5835 | |
7cef7ce3 SM |
5836 | if (! tty->output) |
5837 | error ("Terminal is currently suspended"); | |
cecfdea6 | 5838 | |
7cef7ce3 SM |
5839 | if (tty->termscript) |
5840 | { | |
5841 | fwrite (SDATA (string), 1, SBYTES (string), tty->termscript); | |
5842 | fflush (tty->termscript); | |
5843 | } | |
5844 | out = tty->output; | |
4588ec20 | 5845 | } |
7cef7ce3 SM |
5846 | fwrite (SDATA (string), 1, SBYTES (string), out); |
5847 | fflush (out); | |
4d7e6e51 | 5848 | unblock_input (); |
4588ec20 JB |
5849 | return Qnil; |
5850 | } | |
5851 | ||
5f5c8ee5 | 5852 | |
a7ca3326 | 5853 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 5854 | doc: /* Beep, or flash the screen. |
228299fa | 5855 | Also, unless an argument is given, |
7ee72033 | 5856 | terminate any keyboard macro currently executing. */) |
5842a27b | 5857 | (Lisp_Object arg) |
4588ec20 | 5858 | { |
efb859b4 | 5859 | if (!NILP (arg)) |
4588ec20 | 5860 | { |
7fa788da RS |
5861 | if (noninteractive) |
5862 | putchar (07); | |
5863 | else | |
385ed61f | 5864 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5865 | } |
5866 | else | |
5867 | bitch_at_user (); | |
5868 | ||
5869 | return Qnil; | |
5870 | } | |
5871 | ||
dfcf069d | 5872 | void |
971de7fb | 5873 | bitch_at_user (void) |
4588ec20 JB |
5874 | { |
5875 | if (noninteractive) | |
5876 | putchar (07); | |
5f5c8ee5 | 5877 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
4588ec20 JB |
5878 | error ("Keyboard macro terminated by a command ringing the bell"); |
5879 | else | |
385ed61f | 5880 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5881 | } |
5882 | ||
5f5c8ee5 GM |
5883 | |
5884 | \f | |
5885 | /*********************************************************************** | |
5886 | Sleeping, Waiting | |
5887 | ***********************************************************************/ | |
5888 | ||
a7ca3326 | 5889 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 5890 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
5891 | SECONDS may be a floating-point value, meaning that you can wait for a |
5892 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
d35af63c | 5893 | additional wait period, in milliseconds; this is for backwards compatibility. |
7ee72033 | 5894 | \(Not all operating systems support waiting for a fraction of a second.) */) |
5842a27b | 5895 | (Lisp_Object seconds, Lisp_Object milliseconds) |
4588ec20 | 5896 | { |
d311d28c | 5897 | double duration = extract_float (seconds); |
4588ec20 | 5898 | |
d311d28c PE |
5899 | if (!NILP (milliseconds)) |
5900 | { | |
5901 | CHECK_NUMBER (milliseconds); | |
5902 | duration += XINT (milliseconds) / 1000.0; | |
5903 | } | |
b07646f5 | 5904 | |
d35af63c PE |
5905 | if (0 < duration) |
5906 | { | |
5907 | EMACS_TIME t = EMACS_TIME_FROM_DOUBLE (duration); | |
f1dd8073 | 5908 | wait_reading_process_output (min (EMACS_SECS (t), WAIT_READING_MAX), |
d35af63c PE |
5909 | EMACS_NSECS (t), 0, 0, Qnil, NULL, 0); |
5910 | } | |
4588ec20 JB |
5911 | |
5912 | return Qnil; | |
5913 | } | |
5914 | ||
5f5c8ee5 | 5915 | |
dcd1ca45 | 5916 | /* This is just like wait_reading_process_output, except that |
902b9b6d | 5917 | it does redisplay. |
f76475ad | 5918 | |
2bcac766 CY |
5919 | TIMEOUT is number of seconds to wait (float or integer), |
5920 | or t to wait forever. | |
59ea14cd | 5921 | READING is true if reading input. |
902b9b6d KS |
5922 | If DO_DISPLAY is >0 display process output while waiting. |
5923 | If DO_DISPLAY is >1 perform an initial redisplay before waiting. | |
5924 | */ | |
4588ec20 | 5925 | |
f76475ad | 5926 | Lisp_Object |
59ea14cd | 5927 | sit_for (Lisp_Object timeout, bool reading, int do_display) |
f76475ad | 5928 | { |
d35af63c PE |
5929 | intmax_t sec; |
5930 | int nsec; | |
f222369e | 5931 | |
902b9b6d | 5932 | swallow_events (do_display); |
ccddf474 | 5933 | |
902b9b6d | 5934 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 5935 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 5936 | return Qnil; |
4588ec20 | 5937 | |
902b9b6d KS |
5938 | if (do_display >= 2) |
5939 | redisplay_preserve_echo_area (2); | |
5940 | ||
d35af63c | 5941 | if (INTEGERP (timeout)) |
2bcac766 | 5942 | { |
d35af63c PE |
5943 | sec = XINT (timeout); |
5944 | if (! (0 < sec)) | |
5945 | return Qt; | |
5946 | nsec = 0; | |
2bcac766 | 5947 | } |
d35af63c | 5948 | else if (FLOATP (timeout)) |
d311d28c | 5949 | { |
d35af63c PE |
5950 | double seconds = XFLOAT_DATA (timeout); |
5951 | if (! (0 < seconds)) | |
d311d28c | 5952 | return Qt; |
d35af63c PE |
5953 | else |
5954 | { | |
5955 | EMACS_TIME t = EMACS_TIME_FROM_DOUBLE (seconds); | |
f1dd8073 | 5956 | sec = min (EMACS_SECS (t), WAIT_READING_MAX); |
d35af63c PE |
5957 | nsec = EMACS_NSECS (t); |
5958 | } | |
5959 | } | |
5960 | else if (EQ (timeout, Qt)) | |
5961 | { | |
5962 | sec = 0; | |
5963 | nsec = 0; | |
d311d28c | 5964 | } |
d35af63c PE |
5965 | else |
5966 | wrong_type_argument (Qnumberp, timeout); | |
5967 | ||
dfdb645c | 5968 | |
4a4bbad2 | 5969 | #ifdef USABLE_SIGIO |
f75beb47 | 5970 | gobble_input (); |
f76475ad JB |
5971 | #endif |
5972 | ||
d35af63c | 5973 | wait_reading_process_output (sec, nsec, reading ? -1 : 1, do_display, |
dcd1ca45 | 5974 | Qnil, NULL, 0); |
f76475ad | 5975 | |
4588ec20 JB |
5976 | return detect_input_pending () ? Qnil : Qt; |
5977 | } | |
5978 | ||
5f5c8ee5 | 5979 | |
a7ca3326 | 5980 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
025de85b CY |
5981 | doc: /* Perform redisplay. |
5982 | Optional arg FORCE, if non-nil, prevents redisplay from being | |
5983 | preempted by arriving input, even if `redisplay-dont-pause' is nil. | |
5984 | If `redisplay-dont-pause' is non-nil (the default), redisplay is never | |
5985 | preempted by arriving input, so FORCE does nothing. | |
5986 | ||
5987 | Return t if redisplay was performed, nil if redisplay was preempted | |
5988 | immediately by pending input. */) | |
5842a27b | 5989 | (Lisp_Object force) |
f76475ad | 5990 | { |
d311d28c | 5991 | ptrdiff_t count; |
659d9874 | 5992 | |
902b9b6d KS |
5993 | swallow_events (1); |
5994 | if ((detect_input_pending_run_timers (1) | |
01327edf | 5995 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
5996 | || !NILP (Vexecuting_kbd_macro)) |
5997 | return Qnil; | |
f76475ad | 5998 | |
01327edf KS |
5999 | count = SPECPDL_INDEX (); |
6000 | if (!NILP (force) && !redisplay_dont_pause) | |
6001 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 6002 | redisplay_preserve_echo_area (2); |
01327edf | 6003 | unbind_to (count, Qnil); |
7ba07a1a | 6004 | return Qt; |
f76475ad | 6005 | } |
5f5c8ee5 GM |
6006 | |
6007 | ||
6008 | \f | |
6009 | /*********************************************************************** | |
6010 | Other Lisp Functions | |
6011 | ***********************************************************************/ | |
6012 | ||
6013 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
6014 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 6015 | buffer-modified-flags. */ |
5f5c8ee5 GM |
6016 | |
6017 | static Lisp_Object frame_and_buffer_state; | |
6018 | ||
6019 | ||
6020 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 6021 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 6022 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
6023 | VARIABLE is a variable name whose value is either nil or a state vector |
6024 | that will be updated to contain all frames and buffers, | |
228299fa | 6025 | aside from buffers whose names start with space, |
44edd521 RS |
6026 | along with the buffers' read-only and modified flags. This allows a fast |
6027 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 6028 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
6029 | the current state. |
6030 | ||
6031 | If VARIABLE is nil, an internal variable is used. Users should not | |
6032 | pass nil for VARIABLE. */) | |
5842a27b | 6033 | (Lisp_Object variable) |
5f5c8ee5 | 6034 | { |
44edd521 | 6035 | Lisp_Object state, tail, frame, buf; |
086ca913 | 6036 | ptrdiff_t n, idx; |
5f5c8ee5 | 6037 | |
44edd521 RS |
6038 | if (! NILP (variable)) |
6039 | { | |
6040 | CHECK_SYMBOL (variable); | |
6041 | state = Fsymbol_value (variable); | |
6042 | if (! VECTORP (state)) | |
6043 | goto changed; | |
6044 | } | |
6045 | else | |
6046 | state = frame_and_buffer_state; | |
6047 | ||
086ca913 | 6048 | idx = 0; |
5f5c8ee5 GM |
6049 | FOR_EACH_FRAME (tail, frame) |
6050 | { | |
086ca913 | 6051 | if (idx == ASIZE (state)) |
44edd521 | 6052 | goto changed; |
086ca913 | 6053 | if (!EQ (AREF (state, idx++), frame)) |
5f5c8ee5 | 6054 | goto changed; |
086ca913 | 6055 | if (idx == ASIZE (state)) |
44edd521 | 6056 | goto changed; |
086ca913 | 6057 | if (!EQ (AREF (state, idx++), XFRAME (frame)->name)) |
5f5c8ee5 GM |
6058 | goto changed; |
6059 | } | |
44edd521 | 6060 | /* Check that the buffer info matches. */ |
7539e11f | 6061 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6062 | { |
7539e11f | 6063 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6064 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 6065 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 6066 | continue; |
086ca913 | 6067 | if (idx == ASIZE (state)) |
44edd521 | 6068 | goto changed; |
086ca913 | 6069 | if (!EQ (AREF (state, idx++), buf)) |
5f5c8ee5 | 6070 | goto changed; |
086ca913 | 6071 | if (idx == ASIZE (state)) |
44edd521 | 6072 | goto changed; |
086ca913 | 6073 | if (!EQ (AREF (state, idx++), BVAR (XBUFFER (buf), read_only))) |
5f5c8ee5 | 6074 | goto changed; |
086ca913 | 6075 | if (idx == ASIZE (state)) |
44edd521 | 6076 | goto changed; |
086ca913 | 6077 | if (!EQ (AREF (state, idx++), Fbuffer_modified_p (buf))) |
5f5c8ee5 GM |
6078 | goto changed; |
6079 | } | |
086ca913 | 6080 | if (idx == ASIZE (state)) |
44edd521 | 6081 | goto changed; |
5f5c8ee5 | 6082 | /* Detect deletion of a buffer at the end of the list. */ |
086ca913 | 6083 | if (EQ (AREF (state, idx), Qlambda)) |
5f5c8ee5 | 6084 | return Qnil; |
44edd521 RS |
6085 | |
6086 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 6087 | changed: |
44edd521 RS |
6088 | /* Count the size we will need. |
6089 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
6090 | n = 1; |
6091 | FOR_EACH_FRAME (tail, frame) | |
6092 | n += 2; | |
7539e11f | 6093 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6094 | n += 3; |
44edd521 RS |
6095 | /* Reallocate the vector if data has grown to need it, |
6096 | or if it has shrunk a lot. */ | |
6097 | if (! VECTORP (state) | |
77b37c05 PE |
6098 | || n > ASIZE (state) |
6099 | || n + 20 < ASIZE (state) / 2) | |
5f5c8ee5 | 6100 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
6101 | { |
6102 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
6103 | if (! NILP (variable)) | |
6104 | Fset (variable, state); | |
6105 | else | |
6106 | frame_and_buffer_state = state; | |
6107 | } | |
6108 | ||
6109 | /* Record the new data in the (possibly reallocated) vector. */ | |
086ca913 | 6110 | idx = 0; |
5f5c8ee5 GM |
6111 | FOR_EACH_FRAME (tail, frame) |
6112 | { | |
086ca913 DA |
6113 | ASET (state, idx, frame); |
6114 | idx++; | |
6115 | ASET (state, idx, XFRAME (frame)->name); | |
6116 | idx++; | |
5f5c8ee5 | 6117 | } |
7539e11f | 6118 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6119 | { |
7539e11f | 6120 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6121 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 6122 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 6123 | continue; |
086ca913 DA |
6124 | ASET (state, idx, buf); |
6125 | idx++; | |
6126 | ASET (state, idx, BVAR (XBUFFER (buf), read_only)); | |
6127 | idx++; | |
6128 | ASET (state, idx, Fbuffer_modified_p (buf)); | |
6129 | idx++; | |
5f5c8ee5 GM |
6130 | } |
6131 | /* Fill up the vector with lambdas (always at least one). */ | |
086ca913 DA |
6132 | ASET (state, idx, Qlambda); |
6133 | idx++; | |
6134 | while (idx < ASIZE (state)) | |
6135 | { | |
6136 | ASET (state, idx, Qlambda); | |
6137 | idx++; | |
6138 | } | |
5f5c8ee5 | 6139 | /* Make sure we didn't overflow the vector. */ |
086ca913 | 6140 | eassert (idx <= ASIZE (state)); |
5f5c8ee5 GM |
6141 | return Qt; |
6142 | } | |
6143 | ||
6144 | ||
4588ec20 | 6145 | \f |
5f5c8ee5 GM |
6146 | /*********************************************************************** |
6147 | Initialization | |
6148 | ***********************************************************************/ | |
6149 | ||
5f5c8ee5 GM |
6150 | /* Initialization done when Emacs fork is started, before doing stty. |
6151 | Determine terminal type and set terminal_driver. Then invoke its | |
6152 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 6153 | |
dfcf069d | 6154 | void |
971de7fb | 6155 | init_display (void) |
4588ec20 | 6156 | { |
28d440ab KL |
6157 | char *terminal_type; |
6158 | ||
5f5c8ee5 GM |
6159 | /* Construct the space glyph. */ |
6160 | space_glyph.type = CHAR_GLYPH; | |
3fc809e2 | 6161 | SET_CHAR_GLYPH (space_glyph, ' ', DEFAULT_FACE_ID, 0); |
5f5c8ee5 GM |
6162 | space_glyph.charpos = -1; |
6163 | ||
4588ec20 JB |
6164 | inverse_video = 0; |
6165 | cursor_in_echo_area = 0; | |
6166 | terminal_type = (char *) 0; | |
6167 | ||
1315c181 JB |
6168 | /* Now is the time to initialize this; it's used by init_sys_modes |
6169 | during startup. */ | |
2246281f | 6170 | Vinitial_window_system = Qnil; |
4588ec20 | 6171 | |
4181ad9c KL |
6172 | /* SIGWINCH needs to be handled no matter what display we start |
6173 | with. Otherwise newly opened tty frames will not resize | |
6174 | automatically. */ | |
6175 | #ifdef SIGWINCH | |
6176 | #ifndef CANNOT_DUMP | |
6177 | if (initialized) | |
6178 | #endif /* CANNOT_DUMP */ | |
2fe28299 PE |
6179 | { |
6180 | struct sigaction action; | |
6181 | emacs_sigaction_init (&action, deliver_window_change_signal); | |
6182 | sigaction (SIGWINCH, &action, 0); | |
6183 | } | |
4181ad9c | 6184 | #endif /* SIGWINCH */ |
4588ec20 | 6185 | |
d6ef42b9 | 6186 | /* If running as a daemon, no need to initialize any frames/terminal. */ |
ff808935 DN |
6187 | if (IS_DAEMON) |
6188 | return; | |
d6ef42b9 | 6189 | |
1315c181 JB |
6190 | /* If the user wants to use a window system, we shouldn't bother |
6191 | initializing the terminal. This is especially important when the | |
6192 | terminal is so dumb that emacs gives up before and doesn't bother | |
6193 | using the window system. | |
4588ec20 | 6194 | |
36bbad1d KH |
6195 | If the DISPLAY environment variable is set and nonempty, |
6196 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6197 | |
6198 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 6199 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 6200 | { |
36bbad1d | 6201 | char *display; |
36bbad1d | 6202 | display = getenv ("DISPLAY"); |
36bbad1d | 6203 | display_arg = (display != 0 && *display != 0); |
c1fc674b AS |
6204 | |
6205 | if (display_arg && !x_display_ok (display)) | |
6206 | { | |
6207 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
6208 | display); | |
6209 | inhibit_window_system = 1; | |
6210 | } | |
f040093a | 6211 | } |
d460af17 | 6212 | |
4fcc2638 | 6213 | if (!inhibit_window_system && display_arg) |
4588ec20 | 6214 | { |
111d9af3 | 6215 | Vinitial_window_system = Qx; |
4588ec20 JB |
6216 | #ifdef HAVE_X11 |
6217 | Vwindow_system_version = make_number (11); | |
039e5d71 | 6218 | #endif |
9311dcff | 6219 | #ifdef GNU_LINUX |
039e5d71 | 6220 | /* In some versions of ncurses, |
6a428f77 | 6221 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6222 | So call tgetent. */ |
6223 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 | 6224 | #endif |
5f5c8ee5 | 6225 | adjust_frame_glyphs_initially (); |
4588ec20 JB |
6226 | return; |
6227 | } | |
6228 | #endif /* HAVE_X_WINDOWS */ | |
6229 | ||
fd2e066a | 6230 | #ifdef HAVE_NTGUI |
177c0ea7 | 6231 | if (!inhibit_window_system) |
fd2e066a | 6232 | { |
111d9af3 | 6233 | Vinitial_window_system = Qw32; |
fd2e066a | 6234 | Vwindow_system_version = make_number (1); |
5f5c8ee5 | 6235 | adjust_frame_glyphs_initially (); |
fd2e066a GV |
6236 | return; |
6237 | } | |
6238 | #endif /* HAVE_NTGUI */ | |
6239 | ||
edfda783 AR |
6240 | #ifdef HAVE_NS |
6241 | if (!inhibit_window_system | |
6242 | #ifndef CANNOT_DUMP | |
6243 | && initialized | |
6244 | #endif | |
6245 | ) | |
6246 | { | |
111d9af3 | 6247 | Vinitial_window_system = Qns; |
5e617bc2 | 6248 | Vwindow_system_version = make_number (10); |
edfda783 AR |
6249 | adjust_frame_glyphs_initially (); |
6250 | return; | |
6251 | } | |
6252 | #endif | |
6253 | ||
4588ec20 JB |
6254 | /* If no window system has been specified, try to use the terminal. */ |
6255 | if (! isatty (0)) | |
6256 | { | |
1559a86d | 6257 | fatal ("standard input is not a tty"); |
4588ec20 JB |
6258 | exit (1); |
6259 | } | |
6260 | ||
6152361f JR |
6261 | #ifdef WINDOWSNT |
6262 | terminal_type = "w32console"; | |
6263 | #else | |
153a073c | 6264 | /* Look at the TERM variable. */ |
4588ec20 | 6265 | terminal_type = (char *) getenv ("TERM"); |
6152361f | 6266 | #endif |
4588ec20 JB |
6267 | if (!terminal_type) |
6268 | { | |
5d12ff0b | 6269 | #ifdef HAVE_WINDOW_SYSTEM |
b9e590fc RS |
6270 | if (! inhibit_window_system) |
6271 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6272 | else |
6273 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6274 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
4588ec20 JB |
6275 | exit (1); |
6276 | } | |
6277 | ||
0a125897 | 6278 | { |
6ed8eeff | 6279 | struct terminal *t; |
3224dac1 KL |
6280 | struct frame *f = XFRAME (selected_frame); |
6281 | ||
6282 | /* Open a display on the controlling tty. */ | |
6ed8eeff | 6283 | t = init_tty (0, terminal_type, 1); /* Errors are fatal. */ |
3224dac1 KL |
6284 | |
6285 | /* Convert the initial frame to use the new display. */ | |
b04f5ad2 | 6286 | if (f->output_method != output_initial) |
1088b922 | 6287 | emacs_abort (); |
6ed8eeff KL |
6288 | f->output_method = t->type; |
6289 | f->terminal = t; | |
3224dac1 | 6290 | |
6ed8eeff | 6291 | t->reference_count++; |
7ac5dac9 EZ |
6292 | #ifdef MSDOS |
6293 | f->output_data.tty->display_info = &the_only_display_info; | |
6294 | #else | |
6295 | if (f->output_method == output_termcap) | |
6296 | create_tty_output (f); | |
6297 | #endif | |
6ed8eeff | 6298 | t->display_info.tty->top_frame = selected_frame; |
5b65d888 | 6299 | change_frame_size (XFRAME (selected_frame), |
6ed8eeff KL |
6300 | FrameRows (t->display_info.tty), |
6301 | FrameCols (t->display_info.tty), 0, 0, 1); | |
3224dac1 | 6302 | |
6ed8eeff KL |
6303 | /* Delete the initial terminal. */ |
6304 | if (--initial_terminal->reference_count == 0 | |
6305 | && initial_terminal->delete_terminal_hook) | |
6306 | (*initial_terminal->delete_terminal_hook) (initial_terminal); | |
2666355c KL |
6307 | |
6308 | /* Update frame parameters to reflect the new type. */ | |
6309 | Fmodify_frame_parameters | |
6310 | (selected_frame, Fcons (Fcons (Qtty_type, | |
6ed8eeff | 6311 | Ftty_type (selected_frame)), Qnil)); |
657ceaa0 EZ |
6312 | if (t->display_info.tty->name) |
6313 | Fmodify_frame_parameters (selected_frame, | |
6314 | Fcons (Fcons (Qtty, build_string (t->display_info.tty->name)), | |
6315 | Qnil)); | |
6316 | else | |
6317 | Fmodify_frame_parameters (selected_frame, Fcons (Fcons (Qtty, Qnil), | |
6318 | Qnil)); | |
0a125897 | 6319 | } |
3fc809e2 | 6320 | |
d86c299a | 6321 | { |
91fb7e1b | 6322 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6323 | int width = FRAME_TOTAL_COLS (sf); |
6324 | int height = FRAME_LINES (sf); | |
d86c299a | 6325 | |
5f5c8ee5 | 6326 | /* If these sizes are so big they cause overflow, just ignore the |
dfd153ae PE |
6327 | change. It's not clear what better we could do. The rest of |
6328 | the code assumes that (width + 2) * height * sizeof (struct glyph) | |
6329 | does not overflow and does not exceed PTRDIFF_MAX or SIZE_MAX. */ | |
e3c25c68 PE |
6330 | if (INT_ADD_RANGE_OVERFLOW (width, 2, INT_MIN, INT_MAX) |
6331 | || INT_MULTIPLY_RANGE_OVERFLOW (width + 2, height, INT_MIN, INT_MAX) | |
dfd153ae PE |
6332 | || (min (PTRDIFF_MAX, SIZE_MAX) / sizeof (struct glyph) |
6333 | < (width + 2) * height)) | |
1559a86d | 6334 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6335 | } |
6336 | ||
5f5c8ee5 | 6337 | adjust_frame_glyphs_initially (); |
91fb7e1b | 6338 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6339 | |
5f5c8ee5 GM |
6340 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ |
6341 | if (initialized | |
6342 | && !noninteractive | |
2246281f | 6343 | && NILP (Vinitial_window_system)) |
2d764c78 EZ |
6344 | { |
6345 | /* For the initial frame, we don't have any way of knowing what | |
6346 | are the foreground and background colors of the terminal. */ | |
5e617bc2 | 6347 | struct frame *sf = SELECTED_FRAME (); |
2d764c78 | 6348 | |
f9d2fdc4 EZ |
6349 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
6350 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
6351 | call0 (intern ("tty-set-up-initial-frame-faces")); |
6352 | } | |
5f5c8ee5 GM |
6353 | } |
6354 | ||
6355 | ||
6356 | \f | |
6357 | /*********************************************************************** | |
6358 | Blinking cursor | |
6359 | ***********************************************************************/ | |
6360 | ||
c3f13540 | 6361 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 6362 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 6363 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
6364 | WINDOW nil means use the selected window. SHOW non-nil means |
6365 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 | 6366 | don't show a cursor. */) |
5842a27b | 6367 | (Lisp_Object window, Lisp_Object show) |
5f5c8ee5 | 6368 | { |
5f5c8ee5 GM |
6369 | /* Don't change cursor state while redisplaying. This could confuse |
6370 | output routines. */ | |
6371 | if (!redisplaying_p) | |
6372 | { | |
6373 | if (NILP (window)) | |
6374 | window = selected_window; | |
6375 | else | |
b7826503 | 6376 | CHECK_WINDOW (window); |
177c0ea7 | 6377 | |
5d7791b3 | 6378 | XWINDOW (window)->cursor_off_p = NILP (show); |
5f5c8ee5 GM |
6379 | } |
6380 | ||
6381 | return Qnil; | |
4588ec20 | 6382 | } |
5f5c8ee5 GM |
6383 | |
6384 | ||
5d7791b3 GM |
6385 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
6386 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 6387 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 | 6388 | WINDOW nil or omitted means report on the selected window. */) |
5842a27b | 6389 | (Lisp_Object window) |
5d7791b3 GM |
6390 | { |
6391 | struct window *w; | |
177c0ea7 | 6392 | |
5d7791b3 GM |
6393 | if (NILP (window)) |
6394 | window = selected_window; | |
6395 | else | |
b7826503 | 6396 | CHECK_WINDOW (window); |
177c0ea7 | 6397 | |
5d7791b3 | 6398 | w = XWINDOW (window); |
177c0ea7 | 6399 | return w->cursor_off_p ? Qnil : Qt; |
5d7791b3 GM |
6400 | } |
6401 | ||
87478b52 SM |
6402 | DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame, |
6403 | Slast_nonminibuf_frame, 0, 0, 0, | |
6404 | doc: /* Value is last nonminibuffer frame. */) | |
5842a27b | 6405 | (void) |
87478b52 | 6406 | { |
4958ed94 | 6407 | Lisp_Object frame = Qnil; |
87478b52 | 6408 | |
4958ed94 SM |
6409 | if (last_nonminibuf_frame) |
6410 | XSETFRAME (frame, last_nonminibuf_frame); | |
87478b52 SM |
6411 | |
6412 | return frame; | |
6413 | } | |
4588ec20 | 6414 | \f |
5f5c8ee5 GM |
6415 | /*********************************************************************** |
6416 | Initialization | |
6417 | ***********************************************************************/ | |
6418 | ||
dfcf069d | 6419 | void |
971de7fb | 6420 | syms_of_display (void) |
4588ec20 | 6421 | { |
502b9b64 | 6422 | defsubr (&Sredraw_frame); |
4588ec20 | 6423 | defsubr (&Sredraw_display); |
078b3696 | 6424 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
6425 | defsubr (&Sopen_termscript); |
6426 | defsubr (&Sding); | |
7ba07a1a | 6427 | defsubr (&Sredisplay); |
4588ec20 JB |
6428 | defsubr (&Ssleep_for); |
6429 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 6430 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 6431 | defsubr (&Sinternal_show_cursor_p); |
87478b52 | 6432 | defsubr (&Slast_nonminibuf_frame); |
4588ec20 | 6433 | |
e509cfa6 | 6434 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
6435 | defsubr (&Sdump_redisplay_history); |
6436 | #endif | |
6437 | ||
d1dad759 | 6438 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
6439 | staticpro (&frame_and_buffer_state); |
6440 | ||
cd3520a4 JB |
6441 | DEFSYM (Qdisplay_table, "display-table"); |
6442 | DEFSYM (Qredisplay_dont_pause, "redisplay-dont-pause"); | |
9cda4f7c | 6443 | |
29208e82 | 6444 | DEFVAR_INT ("baud-rate", baud_rate, |
025de85b | 6445 | doc: /* The output baud rate of the terminal. |
228299fa GM |
6446 | On most systems, changing this value will affect the amount of padding |
6447 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 6448 | |
29208e82 | 6449 | DEFVAR_BOOL ("inverse-video", inverse_video, |
025de85b | 6450 | doc: /* Non-nil means invert the entire frame display. |
228299fa | 6451 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 6452 | |
29208e82 | 6453 | DEFVAR_BOOL ("visible-bell", visible_bell, |
025de85b | 6454 | doc: /* Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
6455 | |
6456 | See also `ring-bell-function'. */); | |
177c0ea7 | 6457 | |
29208e82 | 6458 | DEFVAR_BOOL ("no-redraw-on-reenter", no_redraw_on_reenter, |
025de85b | 6459 | doc: /* Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
6460 | A non-nil value is useful if the terminal can automatically preserve |
6461 | Emacs's frame display when you reenter Emacs. | |
6462 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 6463 | |
29208e82 | 6464 | DEFVAR_LISP ("initial-window-system", Vinitial_window_system, |
2246281f | 6465 | doc: /* Name of the window system that Emacs uses for the first frame. |
89baa1df EZ |
6466 | The value is a symbol: |
6467 | nil for a termcap frame (a character-only terminal), | |
6468 | 'x' for an Emacs frame that is really an X window, | |
6469 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6470 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6471 | 'pc' for a direct-write MS-DOS frame. | |
6472 | ||
6473 | Use of this variable as a boolean is deprecated. Instead, | |
6474 | use `display-graphic-p' or any of the other `display-*-p' | |
6475 | predicates which report frame's specific UI-related capabilities. */); | |
177c0ea7 | 6476 | |
70b8d0a4 SM |
6477 | DEFVAR_KBOARD ("window-system", Vwindow_system, |
6478 | doc: /* Name of window system through which the selected frame is displayed. | |
89baa1df EZ |
6479 | The value is a symbol: |
6480 | nil for a termcap frame (a character-only terminal), | |
6481 | 'x' for an Emacs frame that is really an X window, | |
6482 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6483 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6484 | 'pc' for a direct-write MS-DOS frame. | |
6485 | ||
6486 | Use of this variable as a boolean is deprecated. Instead, | |
6487 | use `display-graphic-p' or any of the other `display-*-p' | |
6488 | predicates which report frame's specific UI-related capabilities. */); | |
70b8d0a4 | 6489 | |
29208e82 | 6490 | DEFVAR_LISP ("window-system-version", Vwindow_system_version, |
bacf09b4 | 6491 | doc: /* The version number of the window system in use. |
c22140f6 | 6492 | For X windows, this is 11. */); |
177c0ea7 | 6493 | |
29208e82 | 6494 | DEFVAR_BOOL ("cursor-in-echo-area", cursor_in_echo_area, |
bacf09b4 | 6495 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 6496 | |
29208e82 | 6497 | DEFVAR_LISP ("glyph-table", Vglyph_table, |
bacf09b4 | 6498 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
6499 | If not nil, this is a vector indexed by glyph code to define the glyph. |
6500 | Each element can be: | |
6501 | integer: a glyph code which this glyph is an alias for. | |
6502 | string: output this glyph using that string (not impl. in X windows). | |
6503 | nil: this glyph mod 524288 is the code of a character to output, | |
6504 | and this glyph / 524288 is the face number (see `face-id') to use | |
6505 | while outputting it. */); | |
4588ec20 JB |
6506 | Vglyph_table = Qnil; |
6507 | ||
29208e82 | 6508 | DEFVAR_LISP ("standard-display-table", Vstandard_display_table, |
bacf09b4 | 6509 | doc: /* Display table to use for buffers that specify none. |
228299fa | 6510 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
6511 | Vstandard_display_table = Qnil; |
6512 | ||
29208e82 | 6513 | DEFVAR_BOOL ("redisplay-dont-pause", redisplay_dont_pause, |
025de85b | 6514 | doc: /* Non-nil means display update isn't paused when input is detected. */); |
6bf7006f | 6515 | redisplay_dont_pause = 1; |
5f5c8ee5 | 6516 | |
d012c62b | 6517 | #if PERIODIC_PREEMPTION_CHECKING |
29208e82 | 6518 | DEFVAR_LISP ("redisplay-preemption-period", Vredisplay_preemption_period, |
025de85b CY |
6519 | doc: /* Period in seconds between checking for input during redisplay. |
6520 | This has an effect only if `redisplay-dont-pause' is nil; in that | |
6521 | case, arriving input preempts redisplay until the input is processed. | |
6522 | If the value is nil, redisplay is never preempted. */); | |
d012c62b KS |
6523 | Vredisplay_preemption_period = make_float (0.10); |
6524 | #endif | |
6525 | ||
4588ec20 JB |
6526 | #ifdef CANNOT_DUMP |
6527 | if (noninteractive) | |
6528 | #endif | |
6529 | { | |
2246281f | 6530 | Vinitial_window_system = Qnil; |
4588ec20 JB |
6531 | Vwindow_system_version = Qnil; |
6532 | } | |
6533 | } |