Commit | Line | Data |
---|---|---|
4588ec20 | 1 | /* Updating of data structures for redisplay. |
9311dcff | 2 | |
ab422c4d PE |
3 | Copyright (C) 1985-1988, 1993-1995, 1997-2013 Free Software Foundation, |
4 | Inc. | |
4588ec20 JB |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
9ec0b715 | 8 | GNU Emacs is free software: you can redistribute it and/or modify |
4588ec20 | 9 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
10 | the Free Software Foundation, either version 3 of the License, or |
11 | (at your option) any later version. | |
4588ec20 JB |
12 | |
13 | GNU Emacs is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
4588ec20 | 20 | |
18160b98 | 21 | #include <config.h> |
f162bcc3 | 22 | |
406af475 | 23 | #include "sysstdio.h" |
dfcf069d | 24 | #include <unistd.h> |
dfcf069d | 25 | |
47099d6f | 26 | #include "lisp.h" |
4588ec20 | 27 | #include "termchar.h" |
a0879520 | 28 | /* cm.h must come after dispextern.h on Windows. */ |
fd2e066a GV |
29 | #include "dispextern.h" |
30 | #include "cm.h" | |
83be827a | 31 | #include "character.h" |
e5560ff7 | 32 | #include "buffer.h" |
d43721a2 | 33 | #include "keyboard.h" |
502b9b64 | 34 | #include "frame.h" |
428a555e | 35 | #include "termhooks.h" |
4588ec20 JB |
36 | #include "window.h" |
37 | #include "commands.h" | |
38 | #include "disptab.h" | |
39 | #include "indent.h" | |
d169fe39 | 40 | #include "intervals.h" |
97cf50e7 | 41 | #include "blockinput.h" |
dfcf069d | 42 | #include "process.h" |
4588ec20 | 43 | |
58b2bb63 | 44 | #include "syssignal.h" |
a41f8bed | 45 | |
17a2cbbd DC |
46 | #ifdef HAVE_WINDOW_SYSTEM |
47 | #include TERM_HEADER | |
48 | #endif /* HAVE_WINDOW_SYSTEM */ | |
edfda783 | 49 | |
3883a901 RS |
50 | #include <errno.h> |
51 | ||
8148369c | 52 | #include <fpending.h> |
43aac990 | 53 | #include <timespec.h> |
c59592b3 | 54 | |
9311dcff | 55 | #if defined (HAVE_TERM_H) && defined (GNU_LINUX) |
fa0ec9f4 DL |
56 | #include <term.h> /* for tgetent */ |
57 | #endif | |
a68089e4 EZ |
58 | |
59 | #ifdef WINDOWSNT | |
60 | #include "w32.h" | |
61 | #endif | |
5f5c8ee5 GM |
62 | \f |
63 | /* Structure to pass dimensions around. Used for character bounding | |
64 | boxes, glyph matrix dimensions and alike. */ | |
65 | ||
66 | struct dim | |
67 | { | |
68 | int width; | |
69 | int height; | |
70 | }; | |
71 | ||
72 | \f | |
73 | /* Function prototypes. */ | |
74 | ||
f57e2426 | 75 | static void update_frame_line (struct frame *, int); |
2f7c71a1 AS |
76 | static int required_matrix_height (struct window *); |
77 | static int required_matrix_width (struct window *); | |
59ea14cd | 78 | static void change_frame_size_1 (struct frame *, int, int, bool, bool, bool); |
d311d28c | 79 | static void increment_row_positions (struct glyph_row *, ptrdiff_t, ptrdiff_t); |
f57e2426 J |
80 | static void fill_up_frame_row_with_spaces (struct glyph_row *, int); |
81 | static void build_frame_matrix_from_window_tree (struct glyph_matrix *, | |
82 | struct window *); | |
83 | static void build_frame_matrix_from_leaf_window (struct glyph_matrix *, | |
84 | struct window *); | |
f57e2426 J |
85 | static void adjust_decode_mode_spec_buffer (struct frame *); |
86 | static void fill_up_glyph_row_with_spaces (struct glyph_row *); | |
59ea14cd | 87 | static void clear_window_matrices (struct window *, bool); |
f57e2426 | 88 | static void fill_up_glyph_row_area_with_spaces (struct glyph_row *, int); |
59ea14cd PE |
89 | static int scrolling_window (struct window *, bool); |
90 | static bool update_window_line (struct window *, int, bool *); | |
f57e2426 | 91 | static void mirror_make_current (struct window *, int); |
e509cfa6 | 92 | #ifdef GLYPH_DEBUG |
f57e2426 J |
93 | static void check_matrix_pointers (struct glyph_matrix *, |
94 | struct glyph_matrix *); | |
b96fd3e8 | 95 | #endif |
f57e2426 | 96 | static void mirror_line_dance (struct window *, int, int, int *, char *); |
59ea14cd PE |
97 | static bool update_window_tree (struct window *, bool); |
98 | static bool update_window (struct window *, bool); | |
99 | static bool update_frame_1 (struct frame *, bool, bool); | |
100 | static bool scrolling (struct frame *); | |
f57e2426 | 101 | static void set_window_cursor_after_update (struct window *); |
f57e2426 J |
102 | static void adjust_frame_glyphs_for_window_redisplay (struct frame *); |
103 | static void adjust_frame_glyphs_for_frame_redisplay (struct frame *); | |
5f5c8ee5 | 104 | |
59ea14cd | 105 | /* True means last display completed. False means it was preempted. */ |
4588ec20 | 106 | |
59ea14cd | 107 | bool display_completed; |
4588ec20 | 108 | |
e7067d00 | 109 | Lisp_Object Qdisplay_table, Qredisplay_dont_pause; |
5f5c8ee5 | 110 | |
59ea14cd | 111 | /* True means SIGWINCH happened when not safe. */ |
4588ec20 | 112 | |
59ea14cd | 113 | static bool delayed_size_change; |
4588ec20 | 114 | |
5f5c8ee5 | 115 | /* A glyph for a space. */ |
4588ec20 | 116 | |
5f5c8ee5 | 117 | struct glyph space_glyph; |
4588ec20 | 118 | |
f0b79313 DA |
119 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
120 | ||
5f5c8ee5 GM |
121 | /* Counts of allocated structures. These counts serve to diagnose |
122 | memory leaks and double frees. */ | |
4588ec20 | 123 | |
5bf46f05 PE |
124 | static int glyph_matrix_count; |
125 | static int glyph_pool_count; | |
4588ec20 | 126 | |
f0b79313 DA |
127 | #endif /* GLYPH_DEBUG and ENABLE_CHECKING */ |
128 | ||
5f5c8ee5 GM |
129 | /* If non-null, the frame whose frame matrices are manipulated. If |
130 | null, window matrices are worked on. */ | |
4588ec20 | 131 | |
5f5c8ee5 | 132 | static struct frame *frame_matrix_frame; |
4588ec20 | 133 | |
177c0ea7 | 134 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 135 | This may only be used for terminal frames. */ |
836d2cde | 136 | |
e509cfa6 | 137 | #ifdef GLYPH_DEBUG |
4588ec20 | 138 | |
f57e2426 J |
139 | static int window_to_frame_vpos (struct window *, int); |
140 | static int window_to_frame_hpos (struct window *, int); | |
5f5c8ee5 GM |
141 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) |
142 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 143 | |
9b0e97aa GM |
144 | /* One element of the ring buffer containing redisplay history |
145 | information. */ | |
146 | ||
147 | struct redisplay_history | |
148 | { | |
149 | char trace[512 + 100]; | |
150 | }; | |
151 | ||
152 | /* The size of the history buffer. */ | |
153 | ||
154 | #define REDISPLAY_HISTORY_SIZE 30 | |
155 | ||
156 | /* The redisplay history buffer. */ | |
157 | ||
158 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
159 | ||
160 | /* Next free entry in redisplay_history. */ | |
161 | ||
162 | static int history_idx; | |
163 | ||
164 | /* A tick that's incremented each time something is added to the | |
165 | history. */ | |
166 | ||
dfd153ae | 167 | static uprintmax_t history_tick; |
6a8aec41 | 168 | \f |
9b0e97aa GM |
169 | /* Add to the redisplay history how window W has been displayed. |
170 | MSG is a trace containing the information how W's glyph matrix | |
59ea14cd | 171 | has been constructed. PAUSED_P means that the update |
9b0e97aa GM |
172 | has been interrupted for pending input. */ |
173 | ||
174 | static void | |
59ea14cd | 175 | add_window_display_history (struct window *w, const char *msg, bool paused_p) |
9b0e97aa GM |
176 | { |
177 | char *buf; | |
29abe551 | 178 | void *ptr = w; |
177c0ea7 | 179 | |
9b0e97aa GM |
180 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
181 | history_idx = 0; | |
182 | buf = redisplay_history[history_idx].trace; | |
183 | ++history_idx; | |
177c0ea7 | 184 | |
8666506e PE |
185 | snprintf (buf, sizeof redisplay_history[0].trace, |
186 | "%"pMu": window %p (`%s')%s\n%s", | |
187 | history_tick++, | |
29abe551 | 188 | ptr, |
e74aeda8 DA |
189 | ((BUFFERP (w->contents) |
190 | && STRINGP (BVAR (XBUFFER (w->contents), name))) | |
191 | ? SSDATA (BVAR (XBUFFER (w->contents), name)) | |
8666506e PE |
192 | : "???"), |
193 | paused_p ? " ***paused***" : "", | |
194 | msg); | |
9b0e97aa GM |
195 | } |
196 | ||
197 | ||
198 | /* Add to the redisplay history that frame F has been displayed. | |
59ea14cd | 199 | PAUSED_P means that the update has been interrupted for |
9b0e97aa GM |
200 | pending input. */ |
201 | ||
202 | static void | |
59ea14cd | 203 | add_frame_display_history (struct frame *f, bool paused_p) |
9b0e97aa GM |
204 | { |
205 | char *buf; | |
29abe551 | 206 | void *ptr = f; |
177c0ea7 | 207 | |
9b0e97aa GM |
208 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
209 | history_idx = 0; | |
210 | buf = redisplay_history[history_idx].trace; | |
211 | ++history_idx; | |
177c0ea7 | 212 | |
dfd153ae | 213 | sprintf (buf, "%"pMu": update frame %p%s", |
9b0e97aa | 214 | history_tick++, |
29abe551 | 215 | ptr, paused_p ? " ***paused***" : ""); |
9b0e97aa GM |
216 | } |
217 | ||
218 | ||
a7ca3326 | 219 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, |
9b0e97aa | 220 | Sdump_redisplay_history, 0, 0, "", |
7ee72033 | 221 | doc: /* Dump redisplay history to stderr. */) |
5842a27b | 222 | (void) |
9b0e97aa GM |
223 | { |
224 | int i; | |
225 | ||
226 | for (i = history_idx - 1; i != history_idx; --i) | |
227 | { | |
228 | if (i < 0) | |
229 | i = REDISPLAY_HISTORY_SIZE - 1; | |
230 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
231 | } | |
232 | ||
233 | return Qnil; | |
234 | } | |
235 | ||
236 | ||
e509cfa6 | 237 | #else /* not GLYPH_DEBUG */ |
4588ec20 | 238 | |
7df02016 KS |
239 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
240 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 241 | |
e509cfa6 | 242 | #endif /* GLYPH_DEBUG */ |
4588ec20 | 243 | |
4588ec20 | 244 | |
9e4bf381 PE |
245 | #if (defined PROFILING \ |
246 | && (defined __FreeBSD__ || defined GNU_LINUX || defined __MINGW32__) \ | |
247 | && !HAVE___EXECUTABLE_START) | |
248 | /* This function comes first in the Emacs executable and is used only | |
249 | to estimate the text start for profiling. */ | |
4588ec20 | 250 | void |
9e4bf381 | 251 | __executable_start (void) |
4588ec20 | 252 | { |
1088b922 | 253 | emacs_abort (); |
177c0ea7 | 254 | } |
72af86bd | 255 | #endif |
5f5c8ee5 GM |
256 | \f |
257 | /*********************************************************************** | |
258 | Glyph Matrices | |
259 | ***********************************************************************/ | |
260 | ||
261 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
262 | pool from which memory for the matrix should be allocated, or null | |
263 | for window-based redisplay where no glyph pools are used. The | |
264 | member `pool' of the glyph matrix structure returned is set to | |
265 | POOL, the structure is otherwise zeroed. */ | |
266 | ||
5bf46f05 | 267 | static struct glyph_matrix * |
971de7fb | 268 | new_glyph_matrix (struct glyph_pool *pool) |
4588ec20 | 269 | { |
23f86fce | 270 | struct glyph_matrix *result = xzalloc (sizeof *result); |
4588ec20 | 271 | |
f0b79313 | 272 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
5f5c8ee5 GM |
273 | /* Increment number of allocated matrices. This count is used |
274 | to detect memory leaks. */ | |
275 | ++glyph_matrix_count; | |
f0b79313 | 276 | #endif |
4588ec20 | 277 | |
5f5c8ee5 GM |
278 | /* Set pool and return. */ |
279 | result->pool = pool; | |
280 | return result; | |
4588ec20 JB |
281 | } |
282 | ||
4588ec20 | 283 | |
5f5c8ee5 GM |
284 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
285 | ||
f0b79313 DA |
286 | If GLYPH_DEBUG and ENABLE_CHECKING are in effect, the global counter |
287 | glyph_matrix_count is decremented when a matrix is freed. If the count | |
288 | gets negative, more structures were freed than allocated, i.e. one matrix | |
289 | was freed more than once or a bogus pointer was passed to this function. | |
177c0ea7 | 290 | |
5f5c8ee5 GM |
291 | If MATRIX->pool is null, this means that the matrix manages its own |
292 | glyph memory---this is done for matrices on X frames. Freeing the | |
293 | matrix also frees the glyph memory in this case. */ | |
294 | ||
295 | static void | |
971de7fb | 296 | free_glyph_matrix (struct glyph_matrix *matrix) |
4588ec20 | 297 | { |
5f5c8ee5 GM |
298 | if (matrix) |
299 | { | |
300 | int i; | |
301 | ||
f0b79313 | 302 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
5f5c8ee5 GM |
303 | /* Detect the case that more matrices are freed than were |
304 | allocated. */ | |
f0b79313 DA |
305 | --glyph_matrix_count; |
306 | eassert (glyph_matrix_count >= 0); | |
307 | #endif | |
5f5c8ee5 GM |
308 | |
309 | /* Free glyph memory if MATRIX owns it. */ | |
310 | if (matrix->pool == NULL) | |
311 | for (i = 0; i < matrix->rows_allocated; ++i) | |
312 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 313 | |
5f5c8ee5 GM |
314 | /* Free row structures and the matrix itself. */ |
315 | xfree (matrix->rows); | |
316 | xfree (matrix); | |
317 | } | |
318 | } | |
4588ec20 | 319 | |
4588ec20 | 320 | |
5f5c8ee5 GM |
321 | /* Return the number of glyphs to reserve for a marginal area of |
322 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
323 | display line of window W. MARGIN gives the width of the marginal | |
eeaf9bf3 | 324 | area in canonical character units. */ |
5f5c8ee5 GM |
325 | |
326 | static int | |
eeaf9bf3 | 327 | margin_glyphs_to_reserve (struct window *w, int total_glyphs, int margin) |
5f5c8ee5 | 328 | { |
eeaf9bf3 | 329 | if (margin > 0) |
4588ec20 | 330 | { |
5f24fa51 | 331 | int width = w->total_cols; |
eeaf9bf3 | 332 | double d = max (0, margin); |
5f5c8ee5 | 333 | d = min (width / 2 - 1, d); |
eeaf9bf3 | 334 | return (int) ((double) total_glyphs / width * d); |
5f5c8ee5 | 335 | } |
eeaf9bf3 | 336 | return 0; |
5f5c8ee5 GM |
337 | } |
338 | ||
59ea14cd | 339 | /* Return true if ROW's hash value is correct. |
e509cfa6 DA |
340 | Optimized away if ENABLE_CHECKING is not defined. */ |
341 | ||
59ea14cd | 342 | static bool |
7a7270dd EZ |
343 | verify_row_hash (struct glyph_row *row) |
344 | { | |
015137db | 345 | return row->hash == row_hash (row); |
7a7270dd | 346 | } |
4588ec20 | 347 | |
5f5c8ee5 GM |
348 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
349 | window sizes. | |
4588ec20 | 350 | |
5f5c8ee5 GM |
351 | W is null if the function is called for a frame glyph matrix. |
352 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
353 | indices of the first column and row of MATRIX within the frame | |
354 | matrix, if such a matrix exists. They are zero for purely | |
355 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 356 | |
5f5c8ee5 GM |
357 | In window-based redisplay, where no frame matrices exist, glyph |
358 | matrices manage their own glyph storage. Otherwise, they allocate | |
359 | storage from a common frame glyph pool which can be found in | |
360 | MATRIX->pool. | |
23b0200c | 361 | |
5f5c8ee5 GM |
362 | The reason for this memory management strategy is to avoid complete |
363 | frame redraws if possible. When we allocate from a common pool, a | |
364 | change of the location or size of a sub-matrix within the pool | |
365 | requires a complete redisplay of the frame because we cannot easily | |
366 | make sure that the current matrices of all windows still agree with | |
367 | what is displayed on the screen. While this is usually fast, it | |
368 | leads to screen flickering. */ | |
23b0200c | 369 | |
5f5c8ee5 | 370 | static void |
971de7fb | 371 | adjust_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int x, int y, struct dim dim) |
5f5c8ee5 GM |
372 | { |
373 | int i; | |
374 | int new_rows; | |
59ea14cd PE |
375 | bool marginal_areas_changed_p = 0; |
376 | bool header_line_changed_p = 0; | |
377 | bool header_line_p = 0; | |
5f5c8ee5 | 378 | int left = -1, right = -1; |
ca8a12a7 | 379 | int window_width = -1, window_height = -1; |
5f5c8ee5 | 380 | |
6b61353c KH |
381 | /* See if W had a header line that has disappeared now, or vice versa. |
382 | Get W's size. */ | |
5f5c8ee5 GM |
383 | if (w) |
384 | { | |
c3c4768d | 385 | window_box (w, ANY_AREA, 0, 0, &window_width, &window_height); |
6b61353c | 386 | |
045dee35 GM |
387 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
388 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 389 | } |
045dee35 | 390 | matrix->header_line_p = header_line_p; |
23b0200c | 391 | |
6b61353c KH |
392 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
393 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
394 | haven't changed. This optimization is important because preserving |
395 | the matrix means preventing redisplay. */ | |
396 | if (matrix->pool == NULL) | |
397 | { | |
d3d50620 DA |
398 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
399 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
a54e2c05 | 400 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
401 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs |
402 | || right != matrix->right_margin_glyphs); | |
403 | ||
404 | if (!marginal_areas_changed_p | |
bd0443bb | 405 | && !XFRAME (w->frame)->fonts_changed |
045dee35 | 406 | && !header_line_changed_p |
7df02016 KS |
407 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
408 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
409 | && matrix->window_height == window_height |
410 | && matrix->window_vscroll == w->vscroll | |
411 | && matrix->window_width == window_width) | |
412 | return; | |
413 | } | |
177c0ea7 | 414 | |
5f5c8ee5 GM |
415 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
416 | if (matrix->rows_allocated < dim.height) | |
417 | { | |
0065d054 | 418 | int old_alloc = matrix->rows_allocated; |
5f5c8ee5 | 419 | new_rows = dim.height - matrix->rows_allocated; |
0065d054 PE |
420 | matrix->rows = xpalloc (matrix->rows, &matrix->rows_allocated, |
421 | new_rows, INT_MAX, sizeof *matrix->rows); | |
422 | memset (matrix->rows + old_alloc, 0, | |
423 | (matrix->rows_allocated - old_alloc) * sizeof *matrix->rows); | |
5f5c8ee5 GM |
424 | } |
425 | else | |
426 | new_rows = 0; | |
60a8948a | 427 | |
5f5c8ee5 GM |
428 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
429 | on a frame not using window-based redisplay. Set up pointers for | |
430 | each row into the glyph pool. */ | |
431 | if (matrix->pool) | |
432 | { | |
a54e2c05 | 433 | eassert (matrix->pool->glyphs); |
177c0ea7 | 434 | |
5f5c8ee5 | 435 | if (w) |
60a8948a | 436 | { |
5f5c8ee5 | 437 | left = margin_glyphs_to_reserve (w, dim.width, |
d3d50620 | 438 | w->left_margin_cols); |
5f5c8ee5 | 439 | right = margin_glyphs_to_reserve (w, dim.width, |
d3d50620 | 440 | w->right_margin_cols); |
60a8948a | 441 | } |
5f5c8ee5 GM |
442 | else |
443 | left = right = 0; | |
177c0ea7 | 444 | |
5f5c8ee5 | 445 | for (i = 0; i < dim.height; ++i) |
60a8948a | 446 | { |
5f5c8ee5 | 447 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
448 | |
449 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
450 | = (matrix->pool->glyphs |
451 | + (y + i) * matrix->pool->ncolumns | |
452 | + x); | |
177c0ea7 | 453 | |
5f5c8ee5 GM |
454 | if (w == NULL |
455 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 456 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
457 | { |
458 | row->glyphs[TEXT_AREA] | |
459 | = row->glyphs[LEFT_MARGIN_AREA]; | |
460 | row->glyphs[RIGHT_MARGIN_AREA] | |
461 | = row->glyphs[TEXT_AREA] + dim.width; | |
462 | row->glyphs[LAST_AREA] | |
463 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
464 | } | |
465 | else | |
466 | { | |
467 | row->glyphs[TEXT_AREA] | |
468 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
469 | row->glyphs[RIGHT_MARGIN_AREA] | |
470 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
471 | row->glyphs[LAST_AREA] | |
472 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
473 | } | |
60a8948a | 474 | } |
177c0ea7 | 475 | |
5f5c8ee5 GM |
476 | matrix->left_margin_glyphs = left; |
477 | matrix->right_margin_glyphs = right; | |
478 | } | |
479 | else | |
480 | { | |
481 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
6b61353c KH |
482 | its own memory. It is a window matrix for window-based redisplay. |
483 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
484 | if (dim.width > matrix->matrix_w |
485 | || new_rows | |
045dee35 | 486 | || header_line_changed_p |
5f5c8ee5 | 487 | || marginal_areas_changed_p) |
4588ec20 | 488 | { |
5f5c8ee5 GM |
489 | struct glyph_row *row = matrix->rows; |
490 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 491 | |
5f5c8ee5 GM |
492 | while (row < end) |
493 | { | |
494 | row->glyphs[LEFT_MARGIN_AREA] | |
0065d054 PE |
495 | = xnrealloc (row->glyphs[LEFT_MARGIN_AREA], |
496 | dim.width, sizeof (struct glyph)); | |
177c0ea7 | 497 | |
5f5c8ee5 GM |
498 | /* The mode line never has marginal areas. */ |
499 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 500 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
501 | { |
502 | row->glyphs[TEXT_AREA] | |
503 | = row->glyphs[LEFT_MARGIN_AREA]; | |
504 | row->glyphs[RIGHT_MARGIN_AREA] | |
505 | = row->glyphs[TEXT_AREA] + dim.width; | |
506 | row->glyphs[LAST_AREA] | |
507 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
508 | } | |
509 | else | |
510 | { | |
511 | row->glyphs[TEXT_AREA] | |
512 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
513 | row->glyphs[RIGHT_MARGIN_AREA] | |
514 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
515 | row->glyphs[LAST_AREA] | |
516 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
517 | } | |
518 | ++row; | |
519 | } | |
4588ec20 JB |
520 | } |
521 | ||
a54e2c05 | 522 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
523 | matrix->left_margin_glyphs = left; |
524 | matrix->right_margin_glyphs = right; | |
525 | } | |
177c0ea7 | 526 | |
5f5c8ee5 GM |
527 | /* Number of rows to be used by MATRIX. */ |
528 | matrix->nrows = dim.height; | |
a54e2c05 | 529 | eassert (matrix->nrows >= 0); |
5f5c8ee5 | 530 | |
b7b20fbd | 531 | if (w) |
5f5c8ee5 | 532 | { |
b7b20fbd | 533 | if (matrix == w->current_matrix) |
4588ec20 | 534 | { |
b7b20fbd GM |
535 | /* Mark rows in a current matrix of a window as not having |
536 | valid contents. It's important to not do this for | |
537 | desired matrices. When Emacs starts, it may already be | |
538 | building desired matrices when this function runs. */ | |
539 | if (window_width < 0) | |
540 | window_width = window_box_width (w, -1); | |
177c0ea7 | 541 | |
b7b20fbd GM |
542 | /* Optimize the case that only the height has changed (C-x 2, |
543 | upper window). Invalidate all rows that are no longer part | |
544 | of the window. */ | |
545 | if (!marginal_areas_changed_p | |
73d75a62 GM |
546 | && !header_line_changed_p |
547 | && new_rows == 0 | |
548 | && dim.width == matrix->matrix_w | |
7df02016 KS |
549 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
550 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 551 | && matrix->window_width == window_width) |
b7b20fbd | 552 | { |
dd42b31a GM |
553 | /* Find the last row in the window. */ |
554 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
555 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
556 | { | |
26447967 | 557 | ++i; |
dd42b31a GM |
558 | break; |
559 | } | |
b7b20fbd GM |
560 | |
561 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 562 | are invalidated below. */ |
02455cb6 | 563 | if (w->window_end_vpos >= i) |
9d93ce29 | 564 | w->window_end_valid = 0; |
177c0ea7 | 565 | |
b7b20fbd GM |
566 | while (i < matrix->nrows) |
567 | matrix->rows[i++].enabled_p = 0; | |
568 | } | |
569 | else | |
570 | { | |
571 | for (i = 0; i < matrix->nrows; ++i) | |
572 | matrix->rows[i].enabled_p = 0; | |
573 | } | |
5f5c8ee5 | 574 | } |
b7b20fbd | 575 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 576 | { |
b7b20fbd GM |
577 | /* Rows in desired matrices always have to be cleared; |
578 | redisplay expects this is the case when it runs, so it | |
579 | had better be the case when we adjust matrices between | |
580 | redisplays. */ | |
5f5c8ee5 GM |
581 | for (i = 0; i < matrix->nrows; ++i) |
582 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 583 | } |
4588ec20 | 584 | } |
177c0ea7 JB |
585 | |
586 | ||
5f5c8ee5 GM |
587 | /* Remember last values to be able to optimize frame redraws. */ |
588 | matrix->matrix_x = x; | |
589 | matrix->matrix_y = y; | |
590 | matrix->matrix_w = dim.width; | |
591 | matrix->matrix_h = dim.height; | |
592 | ||
593 | /* Record the top y location and height of W at the time the matrix | |
594 | was last adjusted. This is used to optimize redisplay above. */ | |
595 | if (w) | |
4588ec20 | 596 | { |
7df02016 KS |
597 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
598 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
599 | matrix->window_height = window_height; |
600 | matrix->window_width = window_width; | |
601 | matrix->window_vscroll = w->vscroll; | |
602 | } | |
603 | } | |
4588ec20 | 604 | |
4588ec20 | 605 | |
5f5c8ee5 GM |
606 | /* Reverse the contents of rows in MATRIX between START and END. The |
607 | contents of the row at END - 1 end up at START, END - 2 at START + | |
608 | 1 etc. This is part of the implementation of rotate_matrix (see | |
609 | below). */ | |
d52bad65 | 610 | |
5f5c8ee5 | 611 | static void |
971de7fb | 612 | reverse_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 GM |
613 | { |
614 | int i, j; | |
23b0200c | 615 | |
5f5c8ee5 GM |
616 | for (i = start, j = end - 1; i < j; ++i, --j) |
617 | { | |
618 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
619 | initialization. */ | |
620 | struct glyph_row temp; | |
621 | temp = matrix->rows[i]; | |
622 | matrix->rows[i] = matrix->rows[j]; | |
623 | matrix->rows[j] = temp; | |
624 | } | |
625 | } | |
23b0200c | 626 | |
23b0200c | 627 | |
5f5c8ee5 GM |
628 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
629 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
630 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
631 | row structures are moved around). | |
60a8948a | 632 | |
5f5c8ee5 GM |
633 | The algorithm used for rotating the vector was, I believe, first |
634 | described by Kernighan. See the vector R as consisting of two | |
635 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
636 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
637 | and reverse the result to get (ArBr)r which is BA. Similar for | |
638 | rotating right. */ | |
639 | ||
640 | void | |
971de7fb | 641 | rotate_matrix (struct glyph_matrix *matrix, int first, int last, int by) |
5f5c8ee5 GM |
642 | { |
643 | if (by < 0) | |
644 | { | |
645 | /* Up (rotate left, i.e. towards lower indices). */ | |
646 | by = -by; | |
647 | reverse_rows (matrix, first, first + by); | |
648 | reverse_rows (matrix, first + by, last); | |
649 | reverse_rows (matrix, first, last); | |
650 | } | |
651 | else if (by > 0) | |
652 | { | |
653 | /* Down (rotate right, i.e. towards higher indices). */ | |
654 | reverse_rows (matrix, last - by, last); | |
655 | reverse_rows (matrix, first, last - by); | |
656 | reverse_rows (matrix, first, last); | |
657 | } | |
658 | } | |
659 | ||
660 | ||
661 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
662 | with indices START <= index < END. Increment positions by DELTA/ | |
663 | DELTA_BYTES. */ | |
664 | ||
665 | void | |
ace1712c | 666 | increment_matrix_positions (struct glyph_matrix *matrix, int start, int end, |
d311d28c | 667 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
668 | { |
669 | /* Check that START and END are reasonable values. */ | |
a54e2c05 DA |
670 | eassert (start >= 0 && start <= matrix->nrows); |
671 | eassert (end >= 0 && end <= matrix->nrows); | |
672 | eassert (start <= end); | |
5f5c8ee5 GM |
673 | |
674 | for (; start < end; ++start) | |
86c11ba1 | 675 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
676 | } |
677 | ||
678 | ||
59ea14cd PE |
679 | /* Clear the enable_p flags in a range of rows in glyph matrix MATRIX. |
680 | START and END are the row indices of the first and last + 1 row to clear. */ | |
5f5c8ee5 GM |
681 | |
682 | void | |
59ea14cd | 683 | clear_glyph_matrix_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 | 684 | { |
a54e2c05 DA |
685 | eassert (start <= end); |
686 | eassert (start >= 0 && start < matrix->nrows); | |
687 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 688 | |
5f5c8ee5 | 689 | for (; start < end; ++start) |
59ea14cd | 690 | matrix->rows[start].enabled_p = 0; |
5f5c8ee5 GM |
691 | } |
692 | ||
693 | ||
694 | /* Clear MATRIX. | |
695 | ||
59ea14cd PE |
696 | Empty all rows in MATRIX by clearing their enabled_p flags. |
697 | The function prepare_desired_row will eventually really clear a row | |
698 | when it sees one with a false enabled_p flag. | |
5f5c8ee5 | 699 | |
59ea14cd | 700 | Reset update hints to default values. The only update hint |
5f5c8ee5 GM |
701 | currently present is the flag MATRIX->no_scrolling_p. */ |
702 | ||
703 | void | |
971de7fb | 704 | clear_glyph_matrix (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
705 | { |
706 | if (matrix) | |
707 | { | |
59ea14cd | 708 | clear_glyph_matrix_rows (matrix, 0, matrix->nrows); |
5f5c8ee5 GM |
709 | matrix->no_scrolling_p = 0; |
710 | } | |
711 | } | |
177c0ea7 | 712 | |
5f5c8ee5 GM |
713 | |
714 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
715 | Increment y-positions in glyph rows between START and END by DY, | |
716 | and recompute their visible height. */ | |
717 | ||
718 | void | |
971de7fb | 719 | shift_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int start, int end, int dy) |
5f5c8ee5 GM |
720 | { |
721 | int min_y, max_y; | |
177c0ea7 | 722 | |
a54e2c05 DA |
723 | eassert (start <= end); |
724 | eassert (start >= 0 && start < matrix->nrows); | |
725 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 726 | |
7df02016 KS |
727 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
728 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 729 | |
5f5c8ee5 GM |
730 | for (; start < end; ++start) |
731 | { | |
732 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 733 | |
5f5c8ee5 | 734 | row->y += dy; |
d6c747a4 | 735 | row->visible_height = row->height; |
177c0ea7 | 736 | |
5f5c8ee5 | 737 | if (row->y < min_y) |
d6c747a4 GM |
738 | row->visible_height -= min_y - row->y; |
739 | if (row->y + row->height > max_y) | |
740 | row->visible_height -= row->y + row->height - max_y; | |
e61124cd YM |
741 | if (row->fringe_bitmap_periodic_p) |
742 | row->redraw_fringe_bitmaps_p = 1; | |
5f5c8ee5 GM |
743 | } |
744 | } | |
745 | ||
746 | ||
747 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
748 | invalid is done by setting enabled_p to zero for all rows in a | |
749 | current matrix. */ | |
750 | ||
751 | void | |
971de7fb | 752 | clear_current_matrices (register struct frame *f) |
5f5c8ee5 GM |
753 | { |
754 | /* Clear frame current matrix, if we have one. */ | |
755 | if (f->current_matrix) | |
756 | clear_glyph_matrix (f->current_matrix); | |
757 | ||
5a49b79c | 758 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
759 | /* Clear the matrix of the menu bar window, if such a window exists. |
760 | The menu bar window is currently used to display menus on X when | |
761 | no toolkit support is compiled in. */ | |
e69b0960 DA |
762 | if (WINDOWP (f->menu_bar_window)) |
763 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
5a49b79c | 764 | #endif |
5f5c8ee5 | 765 | |
742516e0 | 766 | #if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS) |
9ea173e8 | 767 | /* Clear the matrix of the tool-bar window, if any. */ |
e69b0960 DA |
768 | if (WINDOWP (f->tool_bar_window)) |
769 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
742516e0 | 770 | #endif |
5f5c8ee5 GM |
771 | |
772 | /* Clear current window matrices. */ | |
a54e2c05 | 773 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
774 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); |
775 | } | |
776 | ||
777 | ||
778 | /* Clear out all display lines of F for a coming redisplay. */ | |
779 | ||
780 | void | |
971de7fb | 781 | clear_desired_matrices (register struct frame *f) |
5f5c8ee5 GM |
782 | { |
783 | if (f->desired_matrix) | |
784 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 785 | |
5a49b79c | 786 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
e69b0960 DA |
787 | if (WINDOWP (f->menu_bar_window)) |
788 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
5a49b79c | 789 | #endif |
5f5c8ee5 | 790 | |
742516e0 | 791 | #if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS) |
e69b0960 DA |
792 | if (WINDOWP (f->tool_bar_window)) |
793 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
742516e0 | 794 | #endif |
5f5c8ee5 GM |
795 | |
796 | /* Do it for window matrices. */ | |
a54e2c05 | 797 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
798 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); |
799 | } | |
800 | ||
801 | ||
59ea14cd PE |
802 | /* Clear matrices in window tree rooted in W. If DESIRED_P, |
803 | clear desired matrices, otherwise clear current matrices. */ | |
5f5c8ee5 GM |
804 | |
805 | static void | |
59ea14cd | 806 | clear_window_matrices (struct window *w, bool desired_p) |
5f5c8ee5 GM |
807 | { |
808 | while (w) | |
809 | { | |
e74aeda8 DA |
810 | if (WINDOWP (w->contents)) |
811 | clear_window_matrices (XWINDOW (w->contents), desired_p); | |
5f5c8ee5 GM |
812 | else |
813 | { | |
814 | if (desired_p) | |
815 | clear_glyph_matrix (w->desired_matrix); | |
816 | else | |
817 | { | |
818 | clear_glyph_matrix (w->current_matrix); | |
9d93ce29 | 819 | w->window_end_valid = 0; |
5f5c8ee5 GM |
820 | } |
821 | } | |
822 | ||
d3d50620 | 823 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
824 | } |
825 | } | |
826 | ||
827 | ||
828 | \f | |
829 | /*********************************************************************** | |
830 | Glyph Rows | |
831 | ||
832 | See dispextern.h for an overall explanation of glyph rows. | |
833 | ***********************************************************************/ | |
834 | ||
ec7bc82f DA |
835 | /* Clear glyph row ROW. NOTE: this code relies on the current |
836 | layout of `glyphs' and `used' fields of `struct glyph_row'. */ | |
2cca872d | 837 | |
5f5c8ee5 | 838 | void |
971de7fb | 839 | clear_glyph_row (struct glyph_row *row) |
5f5c8ee5 | 840 | { |
cf647d93 | 841 | enum { off = offsetof (struct glyph_row, used) }; |
ec7bc82f | 842 | |
ec7bc82f | 843 | /* Zero everything except pointers in `glyphs'. */ |
9da0f50e | 844 | memset (row->used, 0, sizeof *row - off); |
5f5c8ee5 GM |
845 | } |
846 | ||
847 | ||
848 | /* Make ROW an empty, enabled row of canonical character height, | |
849 | in window W starting at y-position Y. */ | |
850 | ||
851 | void | |
971de7fb | 852 | blank_row (struct window *w, struct glyph_row *row, int y) |
5f5c8ee5 GM |
853 | { |
854 | int min_y, max_y; | |
177c0ea7 | 855 | |
7df02016 KS |
856 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
857 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 858 | |
5f5c8ee5 GM |
859 | clear_glyph_row (row); |
860 | row->y = y; | |
408f5064 | 861 | row->ascent = row->phys_ascent = 0; |
d3d50620 | 862 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 863 | row->visible_height = row->height; |
177c0ea7 | 864 | |
5f5c8ee5 | 865 | if (row->y < min_y) |
d6c747a4 GM |
866 | row->visible_height -= min_y - row->y; |
867 | if (row->y + row->height > max_y) | |
868 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
869 | |
870 | row->enabled_p = 1; | |
871 | } | |
872 | ||
873 | ||
874 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
875 | are the amounts by which to change positions. Note that the first | |
876 | glyph of the text area of a row can have a buffer position even if | |
877 | the used count of the text area is zero. Such rows display line | |
878 | ends. */ | |
879 | ||
5bf46f05 | 880 | static void |
ace1712c | 881 | increment_row_positions (struct glyph_row *row, |
d311d28c | 882 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
883 | { |
884 | int area, i; | |
885 | ||
886 | /* Increment start and end positions. */ | |
887 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
888 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
889 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
890 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
d36fe237 EZ |
891 | CHARPOS (row->start.pos) += delta; |
892 | BYTEPOS (row->start.pos) += delta_bytes; | |
893 | CHARPOS (row->end.pos) += delta; | |
894 | BYTEPOS (row->end.pos) += delta_bytes; | |
5f5c8ee5 | 895 | |
5cacdcfd KS |
896 | if (!row->enabled_p) |
897 | return; | |
898 | ||
5f5c8ee5 GM |
899 | /* Increment positions in glyphs. */ |
900 | for (area = 0; area < LAST_AREA; ++area) | |
901 | for (i = 0; i < row->used[area]; ++i) | |
902 | if (BUFFERP (row->glyphs[area][i].object) | |
903 | && row->glyphs[area][i].charpos > 0) | |
904 | row->glyphs[area][i].charpos += delta; | |
905 | ||
906 | /* Capture the case of rows displaying a line end. */ | |
907 | if (row->used[TEXT_AREA] == 0 | |
908 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
909 | row->glyphs[TEXT_AREA]->charpos += delta; | |
910 | } | |
911 | ||
912 | ||
9af3e742 | 913 | #if 0 |
5f5c8ee5 GM |
914 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
915 | contents, i.e. glyph structure contents are exchanged between A and | |
916 | B without changing glyph pointers in A and B. */ | |
917 | ||
918 | static void | |
1dae0f0a | 919 | swap_glyphs_in_rows (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
920 | { |
921 | int area; | |
922 | ||
923 | for (area = 0; area < LAST_AREA; ++area) | |
924 | { | |
925 | /* Number of glyphs to swap. */ | |
926 | int max_used = max (a->used[area], b->used[area]); | |
927 | ||
928 | /* Start of glyphs in area of row A. */ | |
929 | struct glyph *glyph_a = a->glyphs[area]; | |
930 | ||
931 | /* End + 1 of glyphs in area of row A. */ | |
932 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
933 | ||
934 | /* Start of glyphs in area of row B. */ | |
935 | struct glyph *glyph_b = b->glyphs[area]; | |
936 | ||
937 | while (glyph_a < glyph_a_end) | |
938 | { | |
939 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
940 | initialization. */ | |
941 | struct glyph temp; | |
942 | temp = *glyph_a; | |
943 | *glyph_a = *glyph_b; | |
944 | *glyph_b = temp; | |
945 | ++glyph_a; | |
946 | ++glyph_b; | |
947 | } | |
948 | } | |
949 | } | |
950 | ||
9af3e742 | 951 | #endif /* 0 */ |
5f5c8ee5 | 952 | |
015137db EZ |
953 | /* Exchange pointers to glyph memory between glyph rows A and B. Also |
954 | exchange the used[] array and the hash values of the rows, because | |
955 | these should all go together for the row's hash value to be | |
956 | correct. */ | |
5f5c8ee5 | 957 | |
b0ab8123 | 958 | static void |
971de7fb | 959 | swap_glyph_pointers (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
960 | { |
961 | int i; | |
015137db EZ |
962 | unsigned hash_tem = a->hash; |
963 | ||
5f5c8ee5 GM |
964 | for (i = 0; i < LAST_AREA + 1; ++i) |
965 | { | |
966 | struct glyph *temp = a->glyphs[i]; | |
015137db | 967 | |
5f5c8ee5 GM |
968 | a->glyphs[i] = b->glyphs[i]; |
969 | b->glyphs[i] = temp; | |
73055685 EZ |
970 | if (i < LAST_AREA) |
971 | { | |
972 | short used_tem = a->used[i]; | |
973 | ||
974 | a->used[i] = b->used[i]; | |
975 | b->used[i] = used_tem; | |
976 | } | |
5f5c8ee5 | 977 | } |
015137db EZ |
978 | a->hash = b->hash; |
979 | b->hash = hash_tem; | |
5f5c8ee5 GM |
980 | } |
981 | ||
982 | ||
ec7bc82f DA |
983 | /* Copy glyph row structure FROM to glyph row structure TO, except that |
984 | glyph pointers, the `used' counts, and the hash values in the structures | |
985 | are left unchanged. NOTE: this code relies on the current layout of | |
986 | `glyphs', `used', `hash' and `x' fields of `struct glyph_row'. */ | |
5f5c8ee5 | 987 | |
b0ab8123 | 988 | static void |
971de7fb | 989 | copy_row_except_pointers (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 | 990 | { |
cf647d93 | 991 | enum { off = offsetof (struct glyph_row, x) }; |
ec7bc82f | 992 | |
9da0f50e | 993 | memcpy (&to->x, &from->x, sizeof *to - off); |
5f5c8ee5 GM |
994 | } |
995 | ||
996 | ||
5f5c8ee5 GM |
997 | /* Assign glyph row FROM to glyph row TO. This works like a structure |
998 | assignment TO = FROM, except that glyph pointers are not copied but | |
999 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1000 | a memory leak. */ | |
1001 | ||
b0ab8123 | 1002 | static void |
971de7fb | 1003 | assign_row (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1004 | { |
1005 | swap_glyph_pointers (to, from); | |
1006 | copy_row_except_pointers (to, from); | |
1007 | } | |
1008 | ||
1009 | ||
1010 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1011 | a row in a window matrix, is a slice of the glyph memory of the | |
1012 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
59ea14cd | 1013 | is true if the glyph memory of WINDOW_ROW is part of the glyph |
5f5c8ee5 GM |
1014 | memory of FRAME_ROW. */ |
1015 | ||
e509cfa6 | 1016 | #ifdef GLYPH_DEBUG |
9339e87f | 1017 | |
59ea14cd | 1018 | static bool |
59fc5cf9 | 1019 | glyph_row_slice_p (struct glyph_row *window_row, struct glyph_row *frame_row) |
5f5c8ee5 GM |
1020 | { |
1021 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1022 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1023 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1024 | ||
1025 | return (frame_glyph_start <= window_glyph_start | |
1026 | && window_glyph_start < frame_glyph_end); | |
1027 | } | |
1028 | ||
9339e87f | 1029 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1030 | |
9af3e742 GM |
1031 | #if 0 |
1032 | ||
5f5c8ee5 GM |
1033 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1034 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1035 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1036 | ||
1037 | static struct glyph_row * | |
59fc5cf9 AS |
1038 | find_glyph_row_slice (struct glyph_matrix *window_matrix, |
1039 | struct glyph_matrix *frame_matrix, int row) | |
5f5c8ee5 GM |
1040 | { |
1041 | int i; | |
1042 | ||
a54e2c05 | 1043 | eassert (row >= 0 && row < frame_matrix->nrows); |
5f5c8ee5 GM |
1044 | |
1045 | for (i = 0; i < window_matrix->nrows; ++i) | |
1046 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1047 | frame_matrix->rows + row)) | |
1048 | break; | |
1049 | ||
1050 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1051 | } | |
1052 | ||
9af3e742 | 1053 | #endif /* 0 */ |
5f5c8ee5 GM |
1054 | |
1055 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1056 | i.e. they are only marked as to be cleared by setting their | |
1057 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1058 | call to this function really clears it. */ | |
1059 | ||
1060 | void | |
971de7fb | 1061 | prepare_desired_row (struct glyph_row *row) |
5f5c8ee5 GM |
1062 | { |
1063 | if (!row->enabled_p) | |
1064 | { | |
59ea14cd | 1065 | bool rp = row->reversed_p; |
5009f85e | 1066 | |
5f5c8ee5 GM |
1067 | clear_glyph_row (row); |
1068 | row->enabled_p = 1; | |
5009f85e | 1069 | row->reversed_p = rp; |
5f5c8ee5 GM |
1070 | } |
1071 | } | |
1072 | ||
1073 | ||
1074 | /* Return a hash code for glyph row ROW. */ | |
1075 | ||
2f7c71a1 | 1076 | static int |
971de7fb | 1077 | line_hash_code (struct glyph_row *row) |
5f5c8ee5 GM |
1078 | { |
1079 | int hash = 0; | |
177c0ea7 | 1080 | |
5f5c8ee5 GM |
1081 | if (row->enabled_p) |
1082 | { | |
4cecaab8 MB |
1083 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1084 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1085 | ||
1086 | while (glyph < end) | |
1087 | { | |
1088 | int c = glyph->u.ch; | |
1089 | int face_id = glyph->face_id; | |
daf01701 | 1090 | if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
4cecaab8 MB |
1091 | c -= SPACEGLYPH; |
1092 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1093 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1094 | ++glyph; | |
1095 | } | |
5f5c8ee5 | 1096 | |
4cecaab8 MB |
1097 | if (hash == 0) |
1098 | hash = 1; | |
5f5c8ee5 GM |
1099 | } |
1100 | ||
1101 | return hash; | |
1102 | } | |
1103 | ||
1104 | ||
153a073c | 1105 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1106 | the number of characters in the line. If must_write_spaces is |
1107 | zero, leading and trailing spaces are ignored. */ | |
1108 | ||
dfd153ae | 1109 | static int |
971de7fb | 1110 | line_draw_cost (struct glyph_matrix *matrix, int vpos) |
5f5c8ee5 GM |
1111 | { |
1112 | struct glyph_row *row = matrix->rows + vpos; | |
1113 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1114 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1115 | int len; | |
1116 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
ca9ce8f2 | 1117 | ptrdiff_t glyph_table_len = GLYPH_TABLE_LENGTH; |
5f5c8ee5 GM |
1118 | |
1119 | /* Ignore trailing and leading spaces if we can. */ | |
daf01701 | 1120 | if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
5f5c8ee5 GM |
1121 | { |
1122 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1123 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1124 | --end; |
1125 | ||
177c0ea7 | 1126 | /* All blank line. */ |
5f5c8ee5 GM |
1127 | if (end == beg) |
1128 | return 0; | |
1129 | ||
1130 | /* Skip over leading spaces. */ | |
1131 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1132 | ++beg; | |
1133 | } | |
1134 | ||
1135 | /* If we don't have a glyph-table, each glyph is one character, | |
1136 | so return the number of glyphs. */ | |
1137 | if (glyph_table_base == 0) | |
1138 | len = end - beg; | |
1139 | else | |
1140 | { | |
1141 | /* Otherwise, scan the glyphs and accumulate their total length | |
1142 | in LEN. */ | |
1143 | len = 0; | |
1144 | while (beg < end) | |
1145 | { | |
3fc809e2 | 1146 | GLYPH g; |
177c0ea7 | 1147 | |
3fc809e2 KS |
1148 | SET_GLYPH_FROM_CHAR_GLYPH (g, *beg); |
1149 | ||
565b39a8 | 1150 | if (GLYPH_INVALID_P (g) |
42186983 | 1151 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) |
5f5c8ee5 GM |
1152 | len += 1; |
1153 | else | |
1154 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1155 | |
5f5c8ee5 GM |
1156 | ++beg; |
1157 | } | |
1158 | } | |
177c0ea7 | 1159 | |
5f5c8ee5 GM |
1160 | return len; |
1161 | } | |
1162 | ||
1163 | ||
59ea14cd PE |
1164 | /* Return true if the glyph rows A and B have equal contents. |
1165 | MOUSE_FACE_P means compare the mouse_face_p flags of A and B, too. */ | |
5f5c8ee5 | 1166 | |
b0ab8123 | 1167 | static bool |
59ea14cd | 1168 | row_equal_p (struct glyph_row *a, struct glyph_row *b, bool mouse_face_p) |
5f5c8ee5 | 1169 | { |
a54e2c05 DA |
1170 | eassert (verify_row_hash (a)); |
1171 | eassert (verify_row_hash (b)); | |
7a7270dd | 1172 | |
5f5c8ee5 GM |
1173 | if (a == b) |
1174 | return 1; | |
1175 | else if (a->hash != b->hash) | |
1176 | return 0; | |
1177 | else | |
1178 | { | |
1179 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1180 | int area; | |
1181 | ||
e4e0bee9 GM |
1182 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1183 | return 0; | |
1184 | ||
5f5c8ee5 GM |
1185 | /* Compare glyphs. */ |
1186 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1187 | { | |
1188 | if (a->used[area] != b->used[area]) | |
1189 | return 0; | |
177c0ea7 | 1190 | |
5f5c8ee5 GM |
1191 | a_glyph = a->glyphs[area]; |
1192 | a_end = a_glyph + a->used[area]; | |
1193 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1194 | |
5f5c8ee5 GM |
1195 | while (a_glyph < a_end |
1196 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1197 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1198 | |
5f5c8ee5 GM |
1199 | if (a_glyph != a_end) |
1200 | return 0; | |
1201 | } | |
1202 | ||
6b61353c KH |
1203 | if (a->fill_line_p != b->fill_line_p |
1204 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1205 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
1206 | || a->left_fringe_face_id != b->left_fringe_face_id | |
e61124cd | 1207 | || a->left_fringe_offset != b->left_fringe_offset |
6b61353c KH |
1208 | || a->right_fringe_bitmap != b->right_fringe_bitmap |
1209 | || a->right_fringe_face_id != b->right_fringe_face_id | |
e61124cd YM |
1210 | || a->right_fringe_offset != b->right_fringe_offset |
1211 | || a->fringe_bitmap_periodic_p != b->fringe_bitmap_periodic_p | |
3d4a365f | 1212 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
6b61353c | 1213 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1214 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1215 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1216 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
918f4159 | 1217 | || a->reversed_p != b->reversed_p |
5f5c8ee5 GM |
1218 | /* Different partially visible characters on left margin. */ |
1219 | || a->x != b->x | |
1220 | /* Different height. */ | |
1221 | || a->ascent != b->ascent | |
408f5064 GM |
1222 | || a->phys_ascent != b->phys_ascent |
1223 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1224 | || a->visible_height != b->visible_height) |
1225 | return 0; | |
1226 | } | |
1227 | ||
1228 | return 1; | |
1229 | } | |
1230 | ||
1231 | ||
1232 | \f | |
1233 | /*********************************************************************** | |
1234 | Glyph Pool | |
1235 | ||
1236 | See dispextern.h for an overall explanation of glyph pools. | |
1237 | ***********************************************************************/ | |
1238 | ||
f0b79313 DA |
1239 | /* Allocate a glyph_pool structure. The structure returned is initialized |
1240 | with zeros. If GLYPH_DEBUG and ENABLE_CHECKING are in effect, the global | |
1241 | variable glyph_pool_count is incremented for each pool allocated. */ | |
5f5c8ee5 GM |
1242 | |
1243 | static struct glyph_pool * | |
971de7fb | 1244 | new_glyph_pool (void) |
5f5c8ee5 | 1245 | { |
23f86fce | 1246 | struct glyph_pool *result = xzalloc (sizeof *result); |
177c0ea7 | 1247 | |
f0b79313 | 1248 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
5f5c8ee5 GM |
1249 | /* For memory leak and double deletion checking. */ |
1250 | ++glyph_pool_count; | |
f0b79313 | 1251 | #endif |
177c0ea7 | 1252 | |
5f5c8ee5 GM |
1253 | return result; |
1254 | } | |
1255 | ||
1256 | ||
1257 | /* Free a glyph_pool structure POOL. The function may be called with | |
f0b79313 DA |
1258 | a null POOL pointer. If GLYPH_DEBUG and ENABLE_CHECKING are in effect, |
1259 | global variable glyph_pool_count is decremented with every pool structure | |
1260 | freed. If this count gets negative, more structures were freed than | |
1261 | allocated, i.e. one structure must have been freed more than once or | |
1262 | a bogus pointer was passed to free_glyph_pool. */ | |
5f5c8ee5 GM |
1263 | |
1264 | static void | |
971de7fb | 1265 | free_glyph_pool (struct glyph_pool *pool) |
5f5c8ee5 GM |
1266 | { |
1267 | if (pool) | |
1268 | { | |
f0b79313 | 1269 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
153a073c | 1270 | /* More freed than allocated? */ |
5f5c8ee5 | 1271 | --glyph_pool_count; |
a54e2c05 | 1272 | eassert (glyph_pool_count >= 0); |
f0b79313 | 1273 | #endif |
5f5c8ee5 GM |
1274 | xfree (pool->glyphs); |
1275 | xfree (pool); | |
1276 | } | |
1277 | } | |
1278 | ||
1279 | ||
1280 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1281 | columns we need. This function never shrinks a pool. The only | |
1282 | case in which this would make sense, would be when a frame's size | |
1283 | is changed from a large value to a smaller one. But, if someone | |
1284 | does it once, we can expect that he will do it again. | |
1285 | ||
59ea14cd | 1286 | Return true if the pool changed in a way which makes |
5f5c8ee5 GM |
1287 | re-adjusting window glyph matrices necessary. */ |
1288 | ||
59ea14cd | 1289 | static bool |
971de7fb | 1290 | realloc_glyph_pool (struct glyph_pool *pool, struct dim matrix_dim) |
5f5c8ee5 | 1291 | { |
ca9ce8f2 | 1292 | ptrdiff_t needed; |
59ea14cd | 1293 | bool changed_p; |
5f5c8ee5 GM |
1294 | |
1295 | changed_p = (pool->glyphs == 0 | |
1296 | || matrix_dim.height != pool->nrows | |
1297 | || matrix_dim.width != pool->ncolumns); | |
1298 | ||
1299 | /* Enlarge the glyph pool. */ | |
ca9ce8f2 | 1300 | needed = matrix_dim.width; |
0065d054 PE |
1301 | if (INT_MULTIPLY_OVERFLOW (needed, matrix_dim.height)) |
1302 | memory_full (SIZE_MAX); | |
ca9ce8f2 | 1303 | needed *= matrix_dim.height; |
5f5c8ee5 GM |
1304 | if (needed > pool->nglyphs) |
1305 | { | |
0065d054 PE |
1306 | ptrdiff_t old_nglyphs = pool->nglyphs; |
1307 | pool->glyphs = xpalloc (pool->glyphs, &pool->nglyphs, | |
1308 | needed - old_nglyphs, -1, sizeof *pool->glyphs); | |
1309 | memset (pool->glyphs + old_nglyphs, 0, | |
1310 | (pool->nglyphs - old_nglyphs) * sizeof *pool->glyphs); | |
5f5c8ee5 GM |
1311 | } |
1312 | ||
153a073c | 1313 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1314 | to do sanity checks, and (b) the number of columns determines |
1315 | where rows in the frame matrix start---this must be available to | |
1316 | determine pointers to rows of window sub-matrices. */ | |
1317 | pool->nrows = matrix_dim.height; | |
1318 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1319 | |
5f5c8ee5 GM |
1320 | return changed_p; |
1321 | } | |
1322 | ||
1323 | ||
1324 | \f | |
1325 | /*********************************************************************** | |
1326 | Debug Code | |
1327 | ***********************************************************************/ | |
1328 | ||
e509cfa6 | 1329 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 1330 | |
a13396c9 | 1331 | |
28d440ab KL |
1332 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1333 | XXX Maybe this should be changed to flush the current terminal instead of | |
1334 | stdout. | |
1335 | */ | |
a13396c9 | 1336 | |
85fece3e PE |
1337 | void flush_stdout (void) EXTERNALLY_VISIBLE; |
1338 | ||
a13396c9 | 1339 | void |
59fc5cf9 | 1340 | flush_stdout (void) |
a13396c9 GM |
1341 | { |
1342 | fflush (stdout); | |
1343 | } | |
1344 | ||
1345 | ||
5f5c8ee5 GM |
1346 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1347 | pointer has been lost, e.g. by using a structure assignment between | |
1348 | rows, at least one pointer must occur more than once in the rows of | |
1349 | MATRIX. */ | |
1350 | ||
1351 | void | |
59fc5cf9 | 1352 | check_matrix_pointer_lossage (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
1353 | { |
1354 | int i, j; | |
177c0ea7 | 1355 | |
5f5c8ee5 GM |
1356 | for (i = 0; i < matrix->nrows; ++i) |
1357 | for (j = 0; j < matrix->nrows; ++j) | |
a54e2c05 | 1358 | eassert (i == j |
5f5c8ee5 GM |
1359 | || (matrix->rows[i].glyphs[TEXT_AREA] |
1360 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1361 | } | |
1362 | ||
1363 | ||
1364 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1365 | ||
1366 | struct glyph_row * | |
59fc5cf9 | 1367 | matrix_row (struct glyph_matrix *matrix, int row) |
5f5c8ee5 | 1368 | { |
a54e2c05 DA |
1369 | eassert (matrix && matrix->rows); |
1370 | eassert (row >= 0 && row < matrix->nrows); | |
5f5c8ee5 GM |
1371 | |
1372 | /* That's really too slow for normal testing because this function | |
1373 | is called almost everywhere. Although---it's still astonishingly | |
1374 | fast, so it is valuable to have for debugging purposes. */ | |
1375 | #if 0 | |
1376 | check_matrix_pointer_lossage (matrix); | |
1377 | #endif | |
177c0ea7 | 1378 | |
5f5c8ee5 GM |
1379 | return matrix->rows + row; |
1380 | } | |
1381 | ||
1382 | ||
1383 | #if 0 /* This function makes invalid assumptions when text is | |
1384 | partially invisible. But it might come handy for debugging | |
1385 | nevertheless. */ | |
1386 | ||
1387 | /* Check invariants that must hold for an up to date current matrix of | |
1388 | window W. */ | |
1389 | ||
1390 | static void | |
59fc5cf9 | 1391 | check_matrix_invariants (struct window *w) |
5f5c8ee5 GM |
1392 | { |
1393 | struct glyph_matrix *matrix = w->current_matrix; | |
1394 | int yb = window_text_bottom_y (w); | |
1395 | struct glyph_row *row = matrix->rows; | |
1396 | struct glyph_row *last_text_row = NULL; | |
1397 | struct buffer *saved = current_buffer; | |
e74aeda8 | 1398 | struct buffer *buffer = XBUFFER (w->contents); |
5f5c8ee5 | 1399 | int c; |
177c0ea7 | 1400 | |
5f5c8ee5 GM |
1401 | /* This can sometimes happen for a fresh window. */ |
1402 | if (matrix->nrows < 2) | |
1403 | return; | |
1404 | ||
1405 | set_buffer_temp (buffer); | |
1406 | ||
1407 | /* Note: last row is always reserved for the mode line. */ | |
1408 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1409 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1410 | { | |
1411 | struct glyph_row *next = row + 1; | |
1412 | ||
1413 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1414 | last_text_row = row; | |
1415 | ||
1416 | /* Check that character and byte positions are in sync. */ | |
a54e2c05 | 1417 | eassert (MATRIX_ROW_START_BYTEPOS (row) |
5f5c8ee5 | 1418 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); |
a54e2c05 | 1419 | eassert (BYTEPOS (row->start.pos) |
d36fe237 | 1420 | == CHAR_TO_BYTE (CHARPOS (row->start.pos))); |
5f5c8ee5 GM |
1421 | |
1422 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1423 | have such a position temporarily in case of a minibuffer | |
1424 | displaying something like `[Sole completion]' at its end. */ | |
1425 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
d36fe237 | 1426 | { |
a54e2c05 | 1427 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
d36fe237 | 1428 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); |
a54e2c05 | 1429 | eassert (BYTEPOS (row->end.pos) |
d36fe237 EZ |
1430 | == CHAR_TO_BYTE (CHARPOS (row->end.pos))); |
1431 | } | |
5f5c8ee5 GM |
1432 | |
1433 | /* Check that end position of `row' is equal to start position | |
1434 | of next row. */ | |
1435 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1436 | { | |
a54e2c05 | 1437 | eassert (MATRIX_ROW_END_CHARPOS (row) |
5f5c8ee5 | 1438 | == MATRIX_ROW_START_CHARPOS (next)); |
a54e2c05 | 1439 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
5f5c8ee5 | 1440 | == MATRIX_ROW_START_BYTEPOS (next)); |
a54e2c05 DA |
1441 | eassert (CHARPOS (row->end.pos) == CHARPOS (next->start.pos)); |
1442 | eassert (BYTEPOS (row->end.pos) == BYTEPOS (next->start.pos)); | |
5f5c8ee5 GM |
1443 | } |
1444 | row = next; | |
1445 | } | |
1446 | ||
a54e2c05 DA |
1447 | eassert (w->current_matrix->nrows == w->desired_matrix->nrows); |
1448 | eassert (w->desired_matrix->rows != NULL); | |
5f5c8ee5 GM |
1449 | set_buffer_temp (saved); |
1450 | } | |
1451 | ||
1452 | #endif /* 0 */ | |
1453 | ||
e509cfa6 | 1454 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
1455 | |
1456 | ||
1457 | \f | |
1458 | /********************************************************************** | |
1459 | Allocating/ Adjusting Glyph Matrices | |
1460 | **********************************************************************/ | |
1461 | ||
1462 | /* Allocate glyph matrices over a window tree for a frame-based | |
1463 | redisplay | |
1464 | ||
1465 | X and Y are column/row within the frame glyph matrix where | |
1466 | sub-matrices for the window tree rooted at WINDOW must be | |
59ea14cd | 1467 | allocated. DIM_ONLY_P means that the caller of this |
8ce2650d YM |
1468 | function is only interested in the result matrix dimension, and |
1469 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1470 | |
1471 | The function returns the total width/height of the sub-matrices of | |
1472 | the window tree. If called on a frame root window, the computation | |
1473 | will take the mini-buffer window into account. | |
1474 | ||
1475 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1476 | ||
1477 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1478 | glyph matrices yet, and | |
1479 | ||
1480 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1481 | any window in the tree will be changed or have been changed (see | |
153a073c | 1482 | DIM_ONLY_P) |
5f5c8ee5 GM |
1483 | |
1484 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1485 | function. | |
1486 | ||
1487 | Windows are arranged into chains of windows on the same level | |
1488 | through the next fields of window structures. Such a level can be | |
1489 | either a sequence of horizontally adjacent windows from left to | |
1490 | right, or a sequence of vertically adjacent windows from top to | |
1491 | bottom. Each window in a horizontal sequence can be either a leaf | |
1492 | window or a vertical sequence; a window in a vertical sequence can | |
1493 | be either a leaf or a horizontal sequence. All windows in a | |
1494 | horizontal sequence have the same height, and all windows in a | |
1495 | vertical sequence have the same width. | |
1496 | ||
1497 | This function uses, for historical reasons, a more general | |
1498 | algorithm to determine glyph matrix dimensions that would be | |
1499 | necessary. | |
1500 | ||
1501 | The matrix height of a horizontal sequence is determined by the | |
1502 | maximum height of any matrix in the sequence. The matrix width of | |
1503 | a horizontal sequence is computed by adding up matrix widths of | |
1504 | windows in the sequence. | |
1505 | ||
1506 | |<------- result width ------->| | |
1507 | +---------+----------+---------+ --- | |
1508 | | | | | | | |
1509 | | | | | | |
1510 | +---------+ | | result height | |
1511 | | +---------+ | |
1512 | | | | | |
1513 | +----------+ --- | |
1514 | ||
1515 | The matrix width of a vertical sequence is the maximum matrix width | |
1516 | of any window in the sequence. Its height is computed by adding up | |
1517 | matrix heights of windows in the sequence. | |
1518 | ||
1519 | |<---- result width -->| | |
1520 | +---------+ --- | |
1521 | | | | | |
1522 | | | | | |
1523 | +---------+--+ | | |
1524 | | | | | |
1525 | | | result height | |
1526 | | | | |
1527 | +------------+---------+ | | |
1528 | | | | | |
1529 | | | | | |
1530 | +------------+---------+ --- */ | |
1531 | ||
1532 | /* Bit indicating that a new matrix will be allocated or has been | |
1533 | allocated. */ | |
1534 | ||
1535 | #define NEW_LEAF_MATRIX (1 << 0) | |
1536 | ||
1537 | /* Bit indicating that a matrix will or has changed its location or | |
1538 | size. */ | |
1539 | ||
1540 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1541 | ||
1542 | static struct dim | |
6f704c76 | 1543 | allocate_matrices_for_frame_redisplay (Lisp_Object window, int x, int y, |
59ea14cd | 1544 | bool dim_only_p, int *window_change_flags) |
5f5c8ee5 GM |
1545 | { |
1546 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1547 | int x0 = x, y0 = y; | |
1548 | int wmax = 0, hmax = 0; | |
1549 | struct dim total; | |
1550 | struct dim dim; | |
1551 | struct window *w; | |
59ea14cd | 1552 | bool in_horz_combination_p; |
5f5c8ee5 GM |
1553 | |
1554 | /* What combination is WINDOW part of? Compute this once since the | |
1555 | result is the same for all windows in the `next' chain. The | |
1556 | special case of a root window (parent equal to nil) is treated | |
1557 | like a vertical combination because a root window's `next' | |
1558 | points to the mini-buffer window, if any, which is arranged | |
1559 | vertically below other windows. */ | |
1560 | in_horz_combination_p | |
d3d50620 | 1561 | = (!NILP (XWINDOW (window)->parent) |
e74aeda8 | 1562 | && WINDOW_HORIZONTAL_COMBINATION_P (XWINDOW (XWINDOW (window)->parent))); |
5f5c8ee5 GM |
1563 | |
1564 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1565 | do |
5f5c8ee5 GM |
1566 | { |
1567 | w = XWINDOW (window); | |
1568 | ||
1569 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1570 | on whether this is a combination or a leaf window. */ |
e74aeda8 DA |
1571 | if (WINDOWP (w->contents)) |
1572 | dim = allocate_matrices_for_frame_redisplay (w->contents, x, y, | |
5f5c8ee5 GM |
1573 | dim_only_p, |
1574 | window_change_flags); | |
1575 | else | |
1576 | { | |
1577 | /* If not already done, allocate sub-matrix structures. */ | |
1578 | if (w->desired_matrix == NULL) | |
1579 | { | |
1580 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1581 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1582 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1583 | } | |
177c0ea7 | 1584 | |
5f5c8ee5 GM |
1585 | /* Width and height MUST be chosen so that there are no |
1586 | holes in the frame matrix. */ | |
5d3cc43c GM |
1587 | dim.width = required_matrix_width (w); |
1588 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1589 | |
1590 | /* Will matrix be re-allocated? */ | |
1591 | if (x != w->desired_matrix->matrix_x | |
1592 | || y != w->desired_matrix->matrix_y | |
1593 | || dim.width != w->desired_matrix->matrix_w | |
1594 | || dim.height != w->desired_matrix->matrix_h | |
1595 | || (margin_glyphs_to_reserve (w, dim.width, | |
d3d50620 | 1596 | w->left_margin_cols) |
5f5c8ee5 GM |
1597 | != w->desired_matrix->left_margin_glyphs) |
1598 | || (margin_glyphs_to_reserve (w, dim.width, | |
d3d50620 | 1599 | w->right_margin_cols) |
5f5c8ee5 GM |
1600 | != w->desired_matrix->right_margin_glyphs)) |
1601 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1602 | ||
1603 | /* Actually change matrices, if allowed. Do not consider | |
1604 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1605 | may have been changed which we don't now here. We trust | |
59ea14cd | 1606 | that we only will be called with DIM_ONLY_P when |
5f5c8ee5 GM |
1607 | necessary. */ |
1608 | if (!dim_only_p) | |
1609 | { | |
1610 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1611 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1612 | } | |
1613 | } | |
1614 | ||
1615 | /* If we are part of a horizontal combination, advance x for | |
1616 | windows to the right of W; otherwise advance y for windows | |
1617 | below W. */ | |
1618 | if (in_horz_combination_p) | |
1619 | x += dim.width; | |
177c0ea7 | 1620 | else |
5f5c8ee5 GM |
1621 | y += dim.height; |
1622 | ||
1623 | /* Remember maximum glyph matrix dimensions. */ | |
1624 | wmax = max (wmax, dim.width); | |
1625 | hmax = max (hmax, dim.height); | |
1626 | ||
1627 | /* Next window on same level. */ | |
d3d50620 | 1628 | window = w->next; |
5f5c8ee5 GM |
1629 | } |
1630 | while (!NILP (window)); | |
1631 | ||
1632 | /* Set `total' to the total glyph matrix dimension of this window | |
1633 | level. In a vertical combination, the width is the width of the | |
1634 | widest window; the height is the y we finally reached, corrected | |
1635 | by the y we started with. In a horizontal combination, the total | |
1636 | height is the height of the tallest window, and the width is the | |
1637 | x we finally reached, corrected by the x we started with. */ | |
1638 | if (in_horz_combination_p) | |
1639 | { | |
1640 | total.width = x - x0; | |
1641 | total.height = hmax; | |
1642 | } | |
177c0ea7 | 1643 | else |
5f5c8ee5 GM |
1644 | { |
1645 | total.width = wmax; | |
1646 | total.height = y - y0; | |
1647 | } | |
1648 | ||
1649 | return total; | |
1650 | } | |
1651 | ||
1652 | ||
5d3cc43c GM |
1653 | /* Return the required height of glyph matrices for window W. */ |
1654 | ||
2f7c71a1 | 1655 | static int |
971de7fb | 1656 | required_matrix_height (struct window *w) |
5d3cc43c GM |
1657 | { |
1658 | #ifdef HAVE_WINDOW_SYSTEM | |
d3d50620 | 1659 | struct frame *f = XFRAME (w->frame); |
177c0ea7 | 1660 | |
5d3cc43c GM |
1661 | if (FRAME_WINDOW_P (f)) |
1662 | { | |
1663 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1ea40aa2 | 1664 | int window_pixel_height = window_box_height (w) + eabs (w->vscroll); |
5d3cc43c | 1665 | return (((window_pixel_height + ch_height - 1) |
cc834cf9 | 1666 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
1667 | /* One partially visible line at the top and |
1668 | bottom of the window. */ | |
1669 | + 2 | |
153a073c | 1670 | /* 2 for header and mode line. */ |
5d3cc43c GM |
1671 | + 2); |
1672 | } | |
1673 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 1674 | |
7df02016 | 1675 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
1676 | } |
1677 | ||
1678 | ||
1679 | /* Return the required width of glyph matrices for window W. */ | |
1680 | ||
2f7c71a1 | 1681 | static int |
971de7fb | 1682 | required_matrix_width (struct window *w) |
5d3cc43c GM |
1683 | { |
1684 | #ifdef HAVE_WINDOW_SYSTEM | |
d3d50620 | 1685 | struct frame *f = XFRAME (w->frame); |
5d3cc43c GM |
1686 | if (FRAME_WINDOW_P (f)) |
1687 | { | |
1688 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 1689 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 1690 | |
5d3cc43c GM |
1691 | /* Compute number of glyphs needed in a glyph row. */ |
1692 | return (((window_pixel_width + ch_width - 1) | |
cc834cf9 | 1693 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
1694 | /* 2 partially visible columns in the text area. */ |
1695 | + 2 | |
1696 | /* One partially visible column at the right | |
1697 | edge of each marginal area. */ | |
1698 | + 1 + 1); | |
1699 | } | |
1700 | #endif /* HAVE_WINDOW_SYSTEM */ | |
1701 | ||
5f24fa51 | 1702 | return w->total_cols; |
5d3cc43c GM |
1703 | } |
1704 | ||
1705 | ||
5f5c8ee5 | 1706 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 1707 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 1708 | |
5f5c8ee5 | 1709 | static void |
971de7fb | 1710 | allocate_matrices_for_window_redisplay (struct window *w) |
5f5c8ee5 | 1711 | { |
5f5c8ee5 GM |
1712 | while (w) |
1713 | { | |
e74aeda8 DA |
1714 | if (WINDOWP (w->contents)) |
1715 | allocate_matrices_for_window_redisplay (XWINDOW (w->contents)); | |
5f5c8ee5 GM |
1716 | else |
1717 | { | |
1718 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
1719 | struct dim dim; |
1720 | ||
1721 | /* If matrices are not yet allocated, allocate them now. */ | |
1722 | if (w->desired_matrix == NULL) | |
1723 | { | |
1724 | w->desired_matrix = new_glyph_matrix (NULL); | |
1725 | w->current_matrix = new_glyph_matrix (NULL); | |
1726 | } | |
1727 | ||
5d3cc43c GM |
1728 | dim.width = required_matrix_width (w); |
1729 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1730 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
1731 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
1732 | } | |
177c0ea7 | 1733 | |
d3d50620 | 1734 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
5f5c8ee5 GM |
1735 | } |
1736 | } | |
1737 | ||
bd0443bb DA |
1738 | /* Allocate/reallocate glyph matrices of a single frame F. |
1739 | This function must be called when a new frame is created, | |
1740 | its size changes, or its window configuration changes. */ | |
5f5c8ee5 GM |
1741 | |
1742 | void | |
bd0443bb | 1743 | adjust_frame_glyphs (struct frame *f) |
5f5c8ee5 | 1744 | { |
408f5064 GM |
1745 | /* Block input so that expose events and other events that access |
1746 | glyph matrices are not processed while we are changing them. */ | |
4d7e6e51 | 1747 | block_input (); |
408f5064 | 1748 | |
5f5c8ee5 GM |
1749 | if (FRAME_WINDOW_P (f)) |
1750 | adjust_frame_glyphs_for_window_redisplay (f); | |
1751 | else | |
1752 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 1753 | |
b09cca6a | 1754 | /* Don't forget the buffer for decode_mode_spec. */ |
5f5c8ee5 GM |
1755 | adjust_decode_mode_spec_buffer (f); |
1756 | ||
1757 | f->glyphs_initialized_p = 1; | |
bd0443bb DA |
1758 | |
1759 | unblock_input (); | |
5f5c8ee5 GM |
1760 | } |
1761 | ||
59ea14cd | 1762 | /* Return true if any window in the tree has nonzero window margins. See |
075757cc | 1763 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ |
59ea14cd | 1764 | static bool |
971de7fb | 1765 | showing_window_margins_p (struct window *w) |
075757cc CY |
1766 | { |
1767 | while (w) | |
1768 | { | |
e74aeda8 | 1769 | if (WINDOWP (w->contents)) |
075757cc | 1770 | { |
e74aeda8 | 1771 | if (showing_window_margins_p (XWINDOW (w->contents))) |
075757cc CY |
1772 | return 1; |
1773 | } | |
eeaf9bf3 | 1774 | else if (w->left_margin_cols > 0 || w->right_margin_cols > 0) |
075757cc | 1775 | return 1; |
3fc809e2 | 1776 | |
d3d50620 | 1777 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
075757cc CY |
1778 | } |
1779 | return 0; | |
1780 | } | |
1781 | ||
5f5c8ee5 | 1782 | |
c9f00270 GM |
1783 | /* In the window tree with root W, build current matrices of leaf |
1784 | windows from the frame's current matrix. */ | |
1785 | ||
1786 | static void | |
971de7fb | 1787 | fake_current_matrices (Lisp_Object window) |
c9f00270 GM |
1788 | { |
1789 | struct window *w; | |
177c0ea7 | 1790 | |
d3d50620 | 1791 | for (; !NILP (window); window = w->next) |
c9f00270 GM |
1792 | { |
1793 | w = XWINDOW (window); | |
177c0ea7 | 1794 | |
e74aeda8 DA |
1795 | if (WINDOWP (w->contents)) |
1796 | fake_current_matrices (w->contents); | |
c9f00270 GM |
1797 | else |
1798 | { | |
1799 | int i; | |
d3d50620 | 1800 | struct frame *f = XFRAME (w->frame); |
c9f00270 GM |
1801 | struct glyph_matrix *m = w->current_matrix; |
1802 | struct glyph_matrix *fm = f->current_matrix; | |
1803 | ||
a54e2c05 DA |
1804 | eassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
1805 | eassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 1806 | |
c9f00270 GM |
1807 | for (i = 0; i < m->matrix_h; ++i) |
1808 | { | |
1809 | struct glyph_row *r = m->rows + i; | |
7df02016 | 1810 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 | 1811 | |
a54e2c05 | 1812 | eassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] |
c9f00270 GM |
1813 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); |
1814 | ||
1815 | r->enabled_p = fr->enabled_p; | |
1816 | if (r->enabled_p) | |
1817 | { | |
1818 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
1819 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
1820 | r->used[TEXT_AREA] = (m->matrix_w | |
1821 | - r->used[LEFT_MARGIN_AREA] | |
1822 | - r->used[RIGHT_MARGIN_AREA]); | |
1823 | r->mode_line_p = 0; | |
c9f00270 GM |
1824 | } |
1825 | } | |
1826 | } | |
1827 | } | |
1828 | } | |
1829 | ||
1830 | ||
bccee4f2 | 1831 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 1832 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 1833 | |
bccee4f2 | 1834 | static struct glyph_matrix * |
971de7fb | 1835 | save_current_matrix (struct frame *f) |
c9f00270 | 1836 | { |
bccee4f2 | 1837 | int i; |
38182d90 | 1838 | struct glyph_matrix *saved = xzalloc (sizeof *saved); |
bccee4f2 | 1839 | saved->nrows = f->current_matrix->nrows; |
23f86fce | 1840 | saved->rows = xzalloc (saved->nrows * sizeof *saved->rows); |
bccee4f2 GM |
1841 | |
1842 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 1843 | { |
bccee4f2 GM |
1844 | struct glyph_row *from = f->current_matrix->rows + i; |
1845 | struct glyph_row *to = saved->rows + i; | |
dfd153ae | 1846 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
141f1ff7 | 1847 | |
23f86fce | 1848 | to->glyphs[TEXT_AREA] = xmalloc (nbytes); |
72af86bd | 1849 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
bccee4f2 | 1850 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
fa93733d EZ |
1851 | to->enabled_p = from->enabled_p; |
1852 | to->hash = from->hash; | |
141f1ff7 EZ |
1853 | if (from->used[LEFT_MARGIN_AREA]) |
1854 | { | |
1855 | nbytes = from->used[LEFT_MARGIN_AREA] * sizeof (struct glyph); | |
3b158d11 | 1856 | to->glyphs[LEFT_MARGIN_AREA] = xmalloc (nbytes); |
141f1ff7 EZ |
1857 | memcpy (to->glyphs[LEFT_MARGIN_AREA], |
1858 | from->glyphs[LEFT_MARGIN_AREA], nbytes); | |
1859 | to->used[LEFT_MARGIN_AREA] = from->used[LEFT_MARGIN_AREA]; | |
1860 | } | |
1861 | if (from->used[RIGHT_MARGIN_AREA]) | |
1862 | { | |
1863 | nbytes = from->used[RIGHT_MARGIN_AREA] * sizeof (struct glyph); | |
3b158d11 | 1864 | to->glyphs[RIGHT_MARGIN_AREA] = xmalloc (nbytes); |
141f1ff7 EZ |
1865 | memcpy (to->glyphs[RIGHT_MARGIN_AREA], |
1866 | from->glyphs[RIGHT_MARGIN_AREA], nbytes); | |
1867 | to->used[RIGHT_MARGIN_AREA] = from->used[RIGHT_MARGIN_AREA]; | |
1868 | } | |
e797dea6 | 1869 | } |
bccee4f2 GM |
1870 | |
1871 | return saved; | |
1872 | } | |
1873 | ||
1874 | ||
1875 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
1876 | and free memory associated with SAVED. */ | |
1877 | ||
1878 | static void | |
971de7fb | 1879 | restore_current_matrix (struct frame *f, struct glyph_matrix *saved) |
bccee4f2 GM |
1880 | { |
1881 | int i; | |
1882 | ||
1883 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 1884 | { |
bccee4f2 GM |
1885 | struct glyph_row *from = saved->rows + i; |
1886 | struct glyph_row *to = f->current_matrix->rows + i; | |
dfd153ae | 1887 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
141f1ff7 | 1888 | |
72af86bd | 1889 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
e797dea6 | 1890 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
bccee4f2 | 1891 | xfree (from->glyphs[TEXT_AREA]); |
2fa833da | 1892 | nbytes = from->used[LEFT_MARGIN_AREA] * sizeof (struct glyph); |
141f1ff7 EZ |
1893 | if (nbytes) |
1894 | { | |
1895 | memcpy (to->glyphs[LEFT_MARGIN_AREA], | |
1896 | from->glyphs[LEFT_MARGIN_AREA], nbytes); | |
1897 | to->used[LEFT_MARGIN_AREA] = from->used[LEFT_MARGIN_AREA]; | |
1898 | xfree (from->glyphs[LEFT_MARGIN_AREA]); | |
1899 | } | |
1900 | else | |
1901 | to->used[LEFT_MARGIN_AREA] = 0; | |
2fa833da | 1902 | nbytes = from->used[RIGHT_MARGIN_AREA] * sizeof (struct glyph); |
141f1ff7 EZ |
1903 | if (nbytes) |
1904 | { | |
1905 | memcpy (to->glyphs[RIGHT_MARGIN_AREA], | |
1906 | from->glyphs[RIGHT_MARGIN_AREA], nbytes); | |
1907 | to->used[RIGHT_MARGIN_AREA] = from->used[RIGHT_MARGIN_AREA]; | |
1908 | xfree (from->glyphs[RIGHT_MARGIN_AREA]); | |
1909 | } | |
1910 | else | |
1911 | to->used[RIGHT_MARGIN_AREA] = 0; | |
e797dea6 | 1912 | } |
177c0ea7 | 1913 | |
bccee4f2 GM |
1914 | xfree (saved->rows); |
1915 | xfree (saved); | |
c9f00270 GM |
1916 | } |
1917 | ||
1918 | ||
bccee4f2 | 1919 | |
5f5c8ee5 GM |
1920 | /* Allocate/reallocate glyph matrices of a single frame F for |
1921 | frame-based redisplay. */ | |
1922 | ||
1923 | static void | |
971de7fb | 1924 | adjust_frame_glyphs_for_frame_redisplay (struct frame *f) |
5f5c8ee5 | 1925 | { |
5f5c8ee5 | 1926 | struct dim matrix_dim; |
59ea14cd | 1927 | bool pool_changed_p; |
5f5c8ee5 GM |
1928 | int window_change_flags; |
1929 | int top_window_y; | |
1930 | ||
1931 | if (!FRAME_LIVE_P (f)) | |
1932 | return; | |
1933 | ||
5f5c8ee5 GM |
1934 | top_window_y = FRAME_TOP_MARGIN (f); |
1935 | ||
1936 | /* Allocate glyph pool structures if not already done. */ | |
1937 | if (f->desired_pool == NULL) | |
1938 | { | |
1939 | f->desired_pool = new_glyph_pool (); | |
1940 | f->current_pool = new_glyph_pool (); | |
1941 | } | |
1942 | ||
1943 | /* Allocate frames matrix structures if needed. */ | |
1944 | if (f->desired_matrix == NULL) | |
1945 | { | |
1946 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1947 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
1948 | } | |
177c0ea7 | 1949 | |
5f5c8ee5 GM |
1950 | /* Compute window glyph matrices. (This takes the mini-buffer |
1951 | window into account). The result is the size of the frame glyph | |
1952 | matrix needed. The variable window_change_flags is set to a bit | |
1953 | mask indicating whether new matrices will be allocated or | |
1954 | existing matrices change their size or location within the frame | |
1955 | matrix. */ | |
1956 | window_change_flags = 0; | |
1957 | matrix_dim | |
1958 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
1959 | 0, top_window_y, | |
5d3cc43c | 1960 | 1, |
5f5c8ee5 GM |
1961 | &window_change_flags); |
1962 | ||
1963 | /* Add in menu bar lines, if any. */ | |
1964 | matrix_dim.height += top_window_y; | |
1965 | ||
1966 | /* Enlarge pools as necessary. */ | |
1967 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
1968 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
1969 | ||
177c0ea7 | 1970 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
1971 | absolutely necessary since it requires a frame redraw. */ |
1972 | if (pool_changed_p || window_change_flags) | |
1973 | { | |
1974 | /* Do it for window matrices. */ | |
1975 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 1976 | 0, top_window_y, 0, |
5f5c8ee5 GM |
1977 | &window_change_flags); |
1978 | ||
1979 | /* Size of frame matrices must equal size of frame. Note | |
1980 | that we are called for X frames with window widths NOT equal | |
1981 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
a54e2c05 | 1982 | eassert (matrix_dim.width == FRAME_COLS (f) |
7df02016 | 1983 | && matrix_dim.height == FRAME_LINES (f)); |
177c0ea7 | 1984 | |
e797dea6 GM |
1985 | /* Pointers to glyph memory in glyph rows are exchanged during |
1986 | the update phase of redisplay, which means in general that a | |
1987 | frame's current matrix consists of pointers into both the | |
1988 | desired and current glyph pool of the frame. Adjusting a | |
1989 | matrix sets the frame matrix up so that pointers are all into | |
1990 | the same pool. If we want to preserve glyph contents of the | |
1991 | current matrix over a call to adjust_glyph_matrix, we must | |
1992 | make a copy of the current glyphs, and restore the current | |
1993 | matrix' contents from that copy. */ | |
1994 | if (display_completed | |
1995 | && !FRAME_GARBAGED_P (f) | |
1996 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
1997 | && matrix_dim.height == f->current_matrix->matrix_h |
1998 | /* For some reason, the frame glyph matrix gets corrupted if | |
1999 | any of the windows contain margins. I haven't been able | |
2000 | to hunt down the reason, but for the moment this prevents | |
2001 | the problem from manifesting. -- cyd */ | |
d5c20fe8 | 2002 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) |
e797dea6 | 2003 | { |
bccee4f2 GM |
2004 | struct glyph_matrix *copy = save_current_matrix (f); |
2005 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2006 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2007 | restore_current_matrix (f, copy); |
e797dea6 GM |
2008 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2009 | } | |
c9f00270 | 2010 | else |
e797dea6 | 2011 | { |
bccee4f2 | 2012 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2013 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2014 | SET_FRAME_GARBAGED (f); | |
2015 | } | |
5f5c8ee5 GM |
2016 | } |
2017 | } | |
2018 | ||
2019 | ||
2020 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2021 | window-based redisplay. */ | |
2022 | ||
2023 | static void | |
971de7fb | 2024 | adjust_frame_glyphs_for_window_redisplay (struct frame *f) |
5f5c8ee5 | 2025 | { |
a54e2c05 | 2026 | eassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); |
177c0ea7 | 2027 | |
5f5c8ee5 | 2028 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2029 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2030 | |
742516e0 | 2031 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2032 | /* Allocate/ reallocate matrices of the dummy window used to display |
2033 | the menu bar under X when no X toolkit support is available. */ | |
5f5c8ee5 GM |
2034 | { |
2035 | /* Allocate a dummy window if not already done. */ | |
d2d37ddc | 2036 | struct window *w; |
e69b0960 | 2037 | if (NILP (f->menu_bar_window)) |
5f5c8ee5 | 2038 | { |
077288cf | 2039 | Lisp_Object frame; |
f00af5b1 | 2040 | fset_menu_bar_window (f, make_window ()); |
e69b0960 | 2041 | w = XWINDOW (f->menu_bar_window); |
077288cf | 2042 | XSETFRAME (frame, f); |
e8c17b81 | 2043 | wset_frame (w, frame); |
5f5c8ee5 GM |
2044 | w->pseudo_window_p = 1; |
2045 | } | |
2046 | else | |
e69b0960 | 2047 | w = XWINDOW (f->menu_bar_window); |
5f5c8ee5 GM |
2048 | |
2049 | /* Set window dimensions to frame dimensions and allocate or | |
2050 | adjust glyph matrices of W. */ | |
5f24fa51 DA |
2051 | w->top_line = 0; |
2052 | w->left_col = 0; | |
2053 | w->total_lines = FRAME_MENU_BAR_LINES (f); | |
2054 | w->total_cols = FRAME_TOTAL_COLS (f); | |
5d3cc43c | 2055 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2056 | } |
742516e0 | 2057 | #endif |
5f5c8ee5 | 2058 | |
742516e0 | 2059 | #if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS) |
d2d37ddc PE |
2060 | { |
2061 | /* Allocate/ reallocate matrices of the tool bar window. If we | |
2062 | don't have a tool bar window yet, make one. */ | |
2063 | struct window *w; | |
e69b0960 | 2064 | if (NILP (f->tool_bar_window)) |
d2d37ddc | 2065 | { |
077288cf | 2066 | Lisp_Object frame; |
f00af5b1 | 2067 | fset_tool_bar_window (f, make_window ()); |
e69b0960 | 2068 | w = XWINDOW (f->tool_bar_window); |
077288cf | 2069 | XSETFRAME (frame, f); |
e8c17b81 | 2070 | wset_frame (w, frame); |
d2d37ddc PE |
2071 | w->pseudo_window_p = 1; |
2072 | } | |
2073 | else | |
e69b0960 | 2074 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2075 | |
5f24fa51 DA |
2076 | w->top_line = FRAME_MENU_BAR_LINES (f); |
2077 | w->left_col = 0; | |
2078 | w->total_lines = FRAME_TOOL_BAR_LINES (f); | |
2079 | w->total_cols = FRAME_TOTAL_COLS (f); | |
d2d37ddc PE |
2080 | allocate_matrices_for_window_redisplay (w); |
2081 | } | |
488dd4c4 | 2082 | #endif |
5f5c8ee5 GM |
2083 | } |
2084 | ||
2085 | ||
5f5c8ee5 GM |
2086 | /* Re-allocate buffer for decode_mode_spec on frame F. */ |
2087 | ||
2088 | static void | |
971de7fb | 2089 | adjust_decode_mode_spec_buffer (struct frame *f) |
5f5c8ee5 | 2090 | { |
38182d90 PE |
2091 | f->decode_mode_spec_buffer = xrealloc (f->decode_mode_spec_buffer, |
2092 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
5f5c8ee5 GM |
2093 | } |
2094 | ||
2095 | ||
2096 | \f | |
2097 | /********************************************************************** | |
2098 | Freeing Glyph Matrices | |
2099 | **********************************************************************/ | |
2100 | ||
2101 | /* Free glyph memory for a frame F. F may be null. This function can | |
2102 | be called for the same frame more than once. The root window of | |
2103 | F may be nil when this function is called. This is the case when | |
2104 | the function is called when F is destroyed. */ | |
2105 | ||
2106 | void | |
971de7fb | 2107 | free_glyphs (struct frame *f) |
5f5c8ee5 GM |
2108 | { |
2109 | if (f && f->glyphs_initialized_p) | |
2110 | { | |
42f55fe0 GM |
2111 | /* Block interrupt input so that we don't get surprised by an X |
2112 | event while we're in an inconsistent state. */ | |
4d7e6e51 | 2113 | block_input (); |
5f5c8ee5 | 2114 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2115 | |
5f5c8ee5 | 2116 | /* Release window sub-matrices. */ |
e69b0960 DA |
2117 | if (!NILP (f->root_window)) |
2118 | free_window_matrices (XWINDOW (f->root_window)); | |
5f5c8ee5 | 2119 | |
5a49b79c | 2120 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2121 | /* Free the dummy window for menu bars without X toolkit and its |
2122 | glyph matrices. */ | |
e69b0960 | 2123 | if (!NILP (f->menu_bar_window)) |
5f5c8ee5 | 2124 | { |
e69b0960 | 2125 | struct window *w = XWINDOW (f->menu_bar_window); |
5f5c8ee5 GM |
2126 | free_glyph_matrix (w->desired_matrix); |
2127 | free_glyph_matrix (w->current_matrix); | |
2128 | w->desired_matrix = w->current_matrix = NULL; | |
f00af5b1 | 2129 | fset_menu_bar_window (f, Qnil); |
5f5c8ee5 | 2130 | } |
5a49b79c | 2131 | #endif |
5f5c8ee5 | 2132 | |
742516e0 | 2133 | #if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS) |
9ea173e8 | 2134 | /* Free the tool bar window and its glyph matrices. */ |
e69b0960 | 2135 | if (!NILP (f->tool_bar_window)) |
5f5c8ee5 | 2136 | { |
e69b0960 | 2137 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2138 | free_glyph_matrix (w->desired_matrix); |
2139 | free_glyph_matrix (w->current_matrix); | |
2140 | w->desired_matrix = w->current_matrix = NULL; | |
f00af5b1 | 2141 | fset_tool_bar_window (f, Qnil); |
5f5c8ee5 | 2142 | } |
742516e0 | 2143 | #endif |
5f5c8ee5 GM |
2144 | |
2145 | /* Release frame glyph matrices. Reset fields to zero in | |
2146 | case we are called a second time. */ | |
2147 | if (f->desired_matrix) | |
2148 | { | |
2149 | free_glyph_matrix (f->desired_matrix); | |
2150 | free_glyph_matrix (f->current_matrix); | |
2151 | f->desired_matrix = f->current_matrix = NULL; | |
2152 | } | |
2153 | ||
2154 | /* Release glyph pools. */ | |
2155 | if (f->desired_pool) | |
2156 | { | |
2157 | free_glyph_pool (f->desired_pool); | |
2158 | free_glyph_pool (f->current_pool); | |
2159 | f->desired_pool = f->current_pool = NULL; | |
2160 | } | |
177c0ea7 | 2161 | |
4d7e6e51 | 2162 | unblock_input (); |
5f5c8ee5 GM |
2163 | } |
2164 | } | |
2165 | ||
2166 | ||
2167 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2168 | function may be called with a null pointer, and it may be called on | |
2169 | the same tree more than once. */ | |
2170 | ||
2171 | void | |
971de7fb | 2172 | free_window_matrices (struct window *w) |
5f5c8ee5 GM |
2173 | { |
2174 | while (w) | |
2175 | { | |
e74aeda8 DA |
2176 | if (WINDOWP (w->contents)) |
2177 | free_window_matrices (XWINDOW (w->contents)); | |
177c0ea7 | 2178 | else |
5f5c8ee5 GM |
2179 | { |
2180 | /* This is a leaf window. Free its memory and reset fields | |
2181 | to zero in case this function is called a second time for | |
2182 | W. */ | |
2183 | free_glyph_matrix (w->current_matrix); | |
2184 | free_glyph_matrix (w->desired_matrix); | |
2185 | w->current_matrix = w->desired_matrix = NULL; | |
2186 | } | |
2187 | ||
2188 | /* Next window on same level. */ | |
d3d50620 | 2189 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2190 | } |
2191 | } | |
2192 | ||
2193 | ||
2194 | /* Check glyph memory leaks. This function is called from | |
2195 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2196 | exits. We therefore free all glyph memory for all active frames | |
2197 | explicitly and check that nothing is left allocated. */ | |
2198 | ||
2199 | void | |
971de7fb | 2200 | check_glyph_memory (void) |
5f5c8ee5 GM |
2201 | { |
2202 | Lisp_Object tail, frame; | |
2203 | ||
2204 | /* Free glyph memory for all frames. */ | |
2205 | FOR_EACH_FRAME (tail, frame) | |
2206 | free_glyphs (XFRAME (frame)); | |
2207 | ||
f0b79313 | 2208 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
5f5c8ee5 | 2209 | /* Check that nothing is left allocated. */ |
f0b79313 DA |
2210 | eassert (glyph_matrix_count == 0); |
2211 | eassert (glyph_pool_count == 0); | |
2212 | #endif | |
5f5c8ee5 GM |
2213 | } |
2214 | ||
2215 | ||
2216 | \f | |
2217 | /********************************************************************** | |
2218 | Building a Frame Matrix | |
2219 | **********************************************************************/ | |
2220 | ||
2221 | /* Most of the redisplay code works on glyph matrices attached to | |
2222 | windows. This is a good solution most of the time, but it is not | |
2223 | suitable for terminal code. Terminal output functions cannot rely | |
2224 | on being able to set an arbitrary terminal window. Instead they | |
2225 | must be provided with a view of the whole frame, i.e. the whole | |
2226 | screen. We build such a view by constructing a frame matrix from | |
2227 | window matrices in this section. | |
2228 | ||
65620264 | 2229 | Windows that must be updated have their must_be_updated_p flag set. |
5f5c8ee5 GM |
2230 | For all such windows, their desired matrix is made part of the |
2231 | desired frame matrix. For other windows, their current matrix is | |
2232 | made part of the desired frame matrix. | |
2233 | ||
2234 | +-----------------+----------------+ | |
2235 | | desired | desired | | |
2236 | | | | | |
2237 | +-----------------+----------------+ | |
2238 | | current | | |
2239 | | | | |
2240 | +----------------------------------+ | |
2241 | ||
2242 | Desired window matrices can be made part of the frame matrix in a | |
2243 | cheap way: We exploit the fact that the desired frame matrix and | |
2244 | desired window matrices share their glyph memory. This is not | |
2245 | possible for current window matrices. Their glyphs are copied to | |
2246 | the desired frame matrix. The latter is equivalent to | |
2247 | preserve_other_columns in the old redisplay. | |
2248 | ||
2249 | Used glyphs counters for frame matrix rows are the result of adding | |
2250 | up glyph lengths of the window matrices. A line in the frame | |
2251 | matrix is enabled, if a corresponding line in a window matrix is | |
2252 | enabled. | |
177c0ea7 | 2253 | |
5f5c8ee5 GM |
2254 | After building the desired frame matrix, it will be passed to |
2255 | terminal code, which will manipulate both the desired and current | |
2256 | frame matrix. Changes applied to the frame's current matrix have | |
2257 | to be visible in current window matrices afterwards, of course. | |
2258 | ||
2259 | This problem is solved like this: | |
2260 | ||
2261 | 1. Window and frame matrices share glyphs. Window matrices are | |
2262 | constructed in a way that their glyph contents ARE the glyph | |
2263 | contents needed in a frame matrix. Thus, any modification of | |
2264 | glyphs done in terminal code will be reflected in window matrices | |
2265 | automatically. | |
177c0ea7 | 2266 | |
5f5c8ee5 GM |
2267 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2268 | intercepted by hook functions so that corresponding row operations | |
2269 | on window matrices can be performed. This is necessary because we | |
2270 | use pointers to glyphs in glyph row structures. To satisfy the | |
2271 | assumption of point 1 above that glyphs are updated implicitly in | |
2272 | window matrices when they are manipulated via the frame matrix, | |
2273 | window and frame matrix must of course agree where to find the | |
2274 | glyphs for their rows. Possible manipulations that must be | |
2275 | mirrored are assignments of rows of the desired frame matrix to the | |
2276 | current frame matrix and scrolling the current frame matrix. */ | |
2277 | ||
2278 | /* Build frame F's desired matrix from window matrices. Only windows | |
2279 | which have the flag must_be_updated_p set have to be updated. Menu | |
2280 | bar lines of a frame are not covered by window matrices, so make | |
2281 | sure not to touch them in this function. */ | |
2282 | ||
2283 | static void | |
971de7fb | 2284 | build_frame_matrix (struct frame *f) |
5f5c8ee5 GM |
2285 | { |
2286 | int i; | |
2287 | ||
2288 | /* F must have a frame matrix when this function is called. */ | |
a54e2c05 | 2289 | eassert (!FRAME_WINDOW_P (f)); |
177c0ea7 | 2290 | |
5f5c8ee5 GM |
2291 | /* Clear all rows in the frame matrix covered by window matrices. |
2292 | Menu bar lines are not covered by windows. */ | |
2293 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2294 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2295 | ||
2296 | /* Build the matrix by walking the window tree. */ | |
2297 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2298 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2299 | } | |
2300 | ||
2301 | ||
2302 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2303 | matrices. W is the root of a window tree. */ | |
2304 | ||
2305 | static void | |
971de7fb | 2306 | build_frame_matrix_from_window_tree (struct glyph_matrix *matrix, struct window *w) |
5f5c8ee5 GM |
2307 | { |
2308 | while (w) | |
2309 | { | |
e74aeda8 DA |
2310 | if (WINDOWP (w->contents)) |
2311 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->contents)); | |
5f5c8ee5 GM |
2312 | else |
2313 | build_frame_matrix_from_leaf_window (matrix, w); | |
2314 | ||
d3d50620 | 2315 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2316 | } |
2317 | } | |
2318 | ||
2319 | ||
2320 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2321 | desired frame matrix built. W is a leaf window whose desired or | |
2322 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2323 | must_be_updated_p determines which matrix it contributes to | |
59ea14cd | 2324 | FRAME_MATRIX. If W->must_be_updated_p, W's desired matrix |
5f5c8ee5 GM |
2325 | is added to FRAME_MATRIX, otherwise W's current matrix is added. |
2326 | Adding a desired matrix means setting up used counters and such in | |
2327 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2328 | means copying glyphs. The latter case corresponds to | |
2329 | preserve_other_columns in the old redisplay. */ | |
2330 | ||
2331 | static void | |
971de7fb | 2332 | build_frame_matrix_from_leaf_window (struct glyph_matrix *frame_matrix, struct window *w) |
5f5c8ee5 GM |
2333 | { |
2334 | struct glyph_matrix *window_matrix; | |
2335 | int window_y, frame_y; | |
2336 | /* If non-zero, a glyph to insert at the right border of W. */ | |
3fc809e2 KS |
2337 | GLYPH right_border_glyph; |
2338 | ||
2339 | SET_GLYPH_FROM_CHAR (right_border_glyph, 0); | |
5f5c8ee5 GM |
2340 | |
2341 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2342 | if (w->must_be_updated_p) | |
2343 | { | |
2344 | window_matrix = w->desired_matrix; | |
2345 | ||
2346 | /* Decide whether we want to add a vertical border glyph. */ | |
2347 | if (!WINDOW_RIGHTMOST_P (w)) | |
2348 | { | |
2349 | struct Lisp_Char_Table *dp = window_display_table (w); | |
3fc809e2 | 2350 | Lisp_Object gc; |
b4e49aee | 2351 | |
3fc809e2 KS |
2352 | SET_GLYPH_FROM_CHAR (right_border_glyph, '|'); |
2353 | if (dp | |
d311d28c | 2354 | && (gc = DISP_BORDER_GLYPH (dp), GLYPH_CODE_P (gc))) |
3fc809e2 KS |
2355 | { |
2356 | SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph, gc); | |
2357 | spec_glyph_lookup_face (w, &right_border_glyph); | |
2358 | } | |
b4e49aee | 2359 | |
3fc809e2 KS |
2360 | if (GLYPH_FACE (right_border_glyph) <= 0) |
2361 | SET_GLYPH_FACE (right_border_glyph, VERTICAL_BORDER_FACE_ID); | |
5f5c8ee5 GM |
2362 | } |
2363 | } | |
2364 | else | |
2365 | window_matrix = w->current_matrix; | |
2366 | ||
2367 | /* For all rows in the window matrix and corresponding rows in the | |
2368 | frame matrix. */ | |
2369 | window_y = 0; | |
2370 | frame_y = window_matrix->matrix_y; | |
2371 | while (window_y < window_matrix->nrows) | |
2372 | { | |
2373 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2374 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
59ea14cd | 2375 | bool current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2376 | |
2377 | /* Fill up the frame row with spaces up to the left margin of the | |
2378 | window row. */ | |
2379 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2380 | ||
2381 | /* Fill up areas in the window matrix row with spaces. */ | |
2382 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2383 | |
2384 | /* If only part of W's desired matrix has been built, and | |
2385 | window_row wasn't displayed, use the corresponding current | |
2386 | row instead. */ | |
2387 | if (window_matrix == w->desired_matrix | |
2388 | && !window_row->enabled_p) | |
2389 | { | |
2390 | window_row = w->current_matrix->rows + window_y; | |
2391 | current_row_p = 1; | |
2392 | } | |
177c0ea7 | 2393 | |
2a8bd25f | 2394 | if (current_row_p) |
5f5c8ee5 | 2395 | { |
2a8bd25f | 2396 | /* Copy window row to frame row. */ |
72af86bd AS |
2397 | memcpy (frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, |
2398 | window_row->glyphs[0], | |
2399 | window_matrix->matrix_w * sizeof (struct glyph)); | |
5f5c8ee5 GM |
2400 | } |
2401 | else | |
2402 | { | |
a54e2c05 | 2403 | eassert (window_row->enabled_p); |
177c0ea7 | 2404 | |
2a8bd25f GM |
2405 | /* Only when a desired row has been displayed, we want |
2406 | the corresponding frame row to be updated. */ | |
2407 | frame_row->enabled_p = 1; | |
177c0ea7 | 2408 | |
5f5c8ee5 GM |
2409 | /* Maybe insert a vertical border between horizontally adjacent |
2410 | windows. */ | |
3fc809e2 | 2411 | if (GLYPH_CHAR (right_border_glyph) != 0) |
5f5c8ee5 GM |
2412 | { |
2413 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2414 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2415 | } | |
2416 | ||
e509cfa6 | 2417 | #ifdef GLYPH_DEBUG |
a13396c9 GM |
2418 | /* Window row window_y must be a slice of frame row |
2419 | frame_y. */ | |
a54e2c05 | 2420 | eassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2421 | |
5f5c8ee5 GM |
2422 | /* If rows are in sync, we don't have to copy glyphs because |
2423 | frame and window share glyphs. */ | |
177c0ea7 | 2424 | |
a38634ff | 2425 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2426 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2427 | #endif |
5f5c8ee5 GM |
2428 | } |
2429 | ||
2430 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2431 | up with spaces, and visit leaf windows from left to right it | |
2432 | can be done simply. */ | |
177c0ea7 | 2433 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2434 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2435 | ||
5f5c8ee5 GM |
2436 | /* Next row. */ |
2437 | ++window_y; | |
2438 | ++frame_y; | |
2439 | } | |
2440 | } | |
2441 | ||
5f81871e RS |
2442 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2443 | ID, return a glyph that has a realized face ID. | |
2444 | This is used for glyphs displayed specially and not part of the text; | |
2445 | for instance, vertical separators, truncation markers, etc. */ | |
2446 | ||
3fc809e2 | 2447 | void |
971de7fb | 2448 | spec_glyph_lookup_face (struct window *w, GLYPH *glyph) |
5f81871e | 2449 | { |
3fc809e2 | 2450 | int lface_id = GLYPH_FACE (*glyph); |
5f81871e RS |
2451 | /* Convert the glyph's specified face to a realized (cache) face. */ |
2452 | if (lface_id > 0) | |
2453 | { | |
d3d50620 | 2454 | int face_id = merge_faces (XFRAME (w->frame), |
5f81871e | 2455 | Qt, lface_id, DEFAULT_FACE_ID); |
3fc809e2 | 2456 | SET_GLYPH_FACE (*glyph, face_id); |
5f81871e | 2457 | } |
5f81871e | 2458 | } |
5f5c8ee5 GM |
2459 | |
2460 | /* Add spaces to a glyph row ROW in a window matrix. | |
2461 | ||
2462 | Each row has the form: | |
2463 | ||
2464 | +---------+-----------------------------+------------+ | |
2465 | | left | text | right | | |
2466 | +---------+-----------------------------+------------+ | |
2467 | ||
2468 | Left and right marginal areas are optional. This function adds | |
2469 | spaces to areas so that there are no empty holes between areas. | |
2470 | In other words: If the right area is not empty, the text area | |
2471 | is filled up with spaces up to the right area. If the text area | |
2472 | is not empty, the left area is filled up. | |
2473 | ||
2474 | To be called for frame-based redisplay, only. */ | |
2475 | ||
2476 | static void | |
971de7fb | 2477 | fill_up_glyph_row_with_spaces (struct glyph_row *row) |
5f5c8ee5 GM |
2478 | { |
2479 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2480 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2481 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2482 | } | |
2483 | ||
2484 | ||
2485 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2486 | frame-based redisplay only. */ | |
2487 | ||
2488 | static void | |
971de7fb | 2489 | fill_up_glyph_row_area_with_spaces (struct glyph_row *row, int area) |
5f5c8ee5 GM |
2490 | { |
2491 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2492 | { | |
2493 | struct glyph *end = row->glyphs[area + 1]; | |
2494 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2495 | ||
2496 | while (text < end) | |
2497 | *text++ = space_glyph; | |
2498 | row->used[area] = text - row->glyphs[area]; | |
2499 | } | |
2500 | } | |
2501 | ||
2502 | ||
2503 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2504 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2505 | ||
2506 | static void | |
971de7fb | 2507 | fill_up_frame_row_with_spaces (struct glyph_row *row, int upto) |
5f5c8ee5 GM |
2508 | { |
2509 | int i = row->used[TEXT_AREA]; | |
2510 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2511 | |
5f5c8ee5 GM |
2512 | while (i < upto) |
2513 | glyph[i++] = space_glyph; | |
2514 | ||
2515 | row->used[TEXT_AREA] = i; | |
2516 | } | |
2517 | ||
2518 | ||
2519 | \f | |
2520 | /********************************************************************** | |
2521 | Mirroring operations on frame matrices in window matrices | |
2522 | **********************************************************************/ | |
2523 | ||
2524 | /* Set frame being updated via frame-based redisplay to F. This | |
2525 | function must be called before updates to make explicit that we are | |
2526 | working on frame matrices or not. */ | |
2527 | ||
b0ab8123 | 2528 | static void |
971de7fb | 2529 | set_frame_matrix_frame (struct frame *f) |
5f5c8ee5 GM |
2530 | { |
2531 | frame_matrix_frame = f; | |
2532 | } | |
2533 | ||
2534 | ||
2535 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2536 | DESIRED_MATRIX is the desired matrix corresponding to | |
2537 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2538 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2539 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2540 | done in frame matrices, and that we have to perform analogous | |
2541 | operations in window matrices of frame_matrix_frame. */ | |
2542 | ||
b0ab8123 | 2543 | static void |
971de7fb | 2544 | make_current (struct glyph_matrix *desired_matrix, struct glyph_matrix *current_matrix, int row) |
5f5c8ee5 GM |
2545 | { |
2546 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2547 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
59ea14cd | 2548 | bool mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2549 | |
2550 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2551 | between both rows, and does a structure assignment otherwise. */ | |
2552 | assign_row (current_row, desired_row); | |
2553 | ||
2554 | /* Enable current_row to mark it as valid. */ | |
2555 | current_row->enabled_p = 1; | |
e876ff42 | 2556 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2557 | |
2558 | /* If we are called on frame matrices, perform analogous operations | |
2559 | for window matrices. */ | |
2560 | if (frame_matrix_frame) | |
e69b0960 | 2561 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); |
5f5c8ee5 GM |
2562 | } |
2563 | ||
2564 | ||
2565 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2566 | W's frame which has been made current (by swapping pointers between | |
2567 | current and desired matrix). Perform analogous operations in the | |
2568 | matrices of leaf windows in the window tree rooted at W. */ | |
2569 | ||
2570 | static void | |
971de7fb | 2571 | mirror_make_current (struct window *w, int frame_row) |
5f5c8ee5 GM |
2572 | { |
2573 | while (w) | |
2574 | { | |
e74aeda8 DA |
2575 | if (WINDOWP (w->contents)) |
2576 | mirror_make_current (XWINDOW (w->contents), frame_row); | |
5f5c8ee5 GM |
2577 | else |
2578 | { | |
2579 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2580 | here because the checks performed in debug mode there | |
2581 | will not allow the conversion. */ | |
2582 | int row = frame_row - w->desired_matrix->matrix_y; | |
2583 | ||
2584 | /* If FRAME_ROW is within W, assign the desired row to the | |
2585 | current row (exchanging glyph pointers). */ | |
2586 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
2587 | { | |
2588 | struct glyph_row *current_row | |
2589 | = MATRIX_ROW (w->current_matrix, row); | |
2590 | struct glyph_row *desired_row | |
2591 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
2592 | |
2593 | if (desired_row->enabled_p) | |
2594 | assign_row (current_row, desired_row); | |
2595 | else | |
2596 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 | 2597 | current_row->enabled_p = 1; |
d009ae66 EZ |
2598 | |
2599 | /* Set the Y coordinate of the mode/header line's row. | |
2600 | It is needed in draw_row_with_mouse_face to find the | |
2601 | screen coordinates. (Window-based redisplay sets | |
2602 | this in update_window, but no one seems to do that | |
2603 | for frame-based redisplay.) */ | |
2604 | if (current_row->mode_line_p) | |
2605 | current_row->y = row; | |
5f5c8ee5 GM |
2606 | } |
2607 | } | |
177c0ea7 | 2608 | |
d3d50620 | 2609 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2610 | } |
2611 | } | |
2612 | ||
2613 | ||
2614 | /* Perform row dance after scrolling. We are working on the range of | |
2615 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
2616 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
2617 | row I in the range 0 <= I < NLINES, the index of the original line | |
2618 | to move to I. This index is relative to the row range, i.e. 0 <= | |
2619 | index < NLINES. RETAINED_P is a vector containing zero for each | |
2620 | row 0 <= I < NLINES which is empty. | |
2621 | ||
2622 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 2623 | |
5f5c8ee5 | 2624 | void |
6f704c76 DN |
2625 | mirrored_line_dance (struct glyph_matrix *matrix, int unchanged_at_top, int nlines, |
2626 | int *copy_from, char *retained_p) | |
5f5c8ee5 GM |
2627 | { |
2628 | /* A copy of original rows. */ | |
2629 | struct glyph_row *old_rows; | |
2630 | ||
2631 | /* Rows to assign to. */ | |
2632 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 2633 | |
5f5c8ee5 GM |
2634 | int i; |
2635 | ||
2636 | /* Make a copy of the original rows. */ | |
38182d90 | 2637 | old_rows = alloca (nlines * sizeof *old_rows); |
72af86bd | 2638 | memcpy (old_rows, new_rows, nlines * sizeof *old_rows); |
5f5c8ee5 GM |
2639 | |
2640 | /* Assign new rows, maybe clear lines. */ | |
2641 | for (i = 0; i < nlines; ++i) | |
2642 | { | |
59ea14cd | 2643 | bool enabled_before_p = new_rows[i].enabled_p; |
5f5c8ee5 | 2644 | |
a54e2c05 DA |
2645 | eassert (i + unchanged_at_top < matrix->nrows); |
2646 | eassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
5f5c8ee5 GM |
2647 | new_rows[i] = old_rows[copy_from[i]]; |
2648 | new_rows[i].enabled_p = enabled_before_p; | |
2649 | ||
2650 | /* RETAINED_P is zero for empty lines. */ | |
2651 | if (!retained_p[copy_from[i]]) | |
2652 | new_rows[i].enabled_p = 0; | |
2653 | } | |
2654 | ||
153a073c | 2655 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 | 2656 | if (frame_matrix_frame) |
e69b0960 | 2657 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), |
5f5c8ee5 GM |
2658 | unchanged_at_top, nlines, copy_from, retained_p); |
2659 | } | |
2660 | ||
2661 | ||
a13396c9 | 2662 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 2663 | the current frame matrix. */ |
a13396c9 GM |
2664 | |
2665 | static void | |
971de7fb | 2666 | sync_window_with_frame_matrix_rows (struct window *w) |
a13396c9 | 2667 | { |
d3d50620 | 2668 | struct frame *f = XFRAME (w->frame); |
a13396c9 | 2669 | struct glyph_row *window_row, *window_row_end, *frame_row; |
075c507b | 2670 | int left, right, x, width; |
a13396c9 | 2671 | |
e74aeda8 DA |
2672 | /* Preconditions: W must be a live window on a tty frame. */ |
2673 | eassert (BUFFERP (w->contents)); | |
a54e2c05 | 2674 | eassert (!FRAME_WINDOW_P (f)); |
a13396c9 | 2675 | |
d3d50620 DA |
2676 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
2677 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
2678 | x = w->current_matrix->matrix_x; |
2679 | width = w->current_matrix->matrix_w; | |
2680 | ||
a13396c9 GM |
2681 | window_row = w->current_matrix->rows; |
2682 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 2683 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 2684 | |
5cb88111 | 2685 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 2686 | { |
5cb88111 GM |
2687 | window_row->glyphs[LEFT_MARGIN_AREA] |
2688 | = frame_row->glyphs[0] + x; | |
2689 | window_row->glyphs[TEXT_AREA] | |
2690 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
2691 | window_row->glyphs[LAST_AREA] | |
2692 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
2693 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
2694 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
2695 | } |
2696 | } | |
2697 | ||
2698 | ||
2699 | /* Return the window in the window tree rooted in W containing frame | |
2700 | row ROW. Value is null if none is found. */ | |
2701 | ||
09ad5a91 | 2702 | static struct window * |
971de7fb | 2703 | frame_row_to_window (struct window *w, int row) |
a13396c9 GM |
2704 | { |
2705 | struct window *found = NULL; | |
177c0ea7 | 2706 | |
a13396c9 GM |
2707 | while (w && !found) |
2708 | { | |
e74aeda8 DA |
2709 | if (WINDOWP (w->contents)) |
2710 | found = frame_row_to_window (XWINDOW (w->contents), row); | |
7df02016 KS |
2711 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
2712 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 2713 | found = w; |
177c0ea7 | 2714 | |
d3d50620 | 2715 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
a13396c9 GM |
2716 | } |
2717 | ||
2718 | return found; | |
2719 | } | |
2720 | ||
2721 | ||
5f5c8ee5 GM |
2722 | /* Perform a line dance in the window tree rooted at W, after |
2723 | scrolling a frame matrix in mirrored_line_dance. | |
2724 | ||
2725 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
2726 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
2727 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
2728 | I < NLINES, the index of the original line to move to I. This | |
2729 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
2730 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
2731 | which is empty. */ | |
2732 | ||
2733 | static void | |
971de7fb | 2734 | mirror_line_dance (struct window *w, int unchanged_at_top, int nlines, int *copy_from, char *retained_p) |
5f5c8ee5 GM |
2735 | { |
2736 | while (w) | |
2737 | { | |
e74aeda8 DA |
2738 | if (WINDOWP (w->contents)) |
2739 | mirror_line_dance (XWINDOW (w->contents), unchanged_at_top, | |
5f5c8ee5 GM |
2740 | nlines, copy_from, retained_p); |
2741 | else | |
2742 | { | |
2743 | /* W is a leaf window, and we are working on its current | |
2744 | matrix m. */ | |
2745 | struct glyph_matrix *m = w->current_matrix; | |
59ea14cd PE |
2746 | int i; |
2747 | bool sync_p = 0; | |
5f5c8ee5 GM |
2748 | struct glyph_row *old_rows; |
2749 | ||
2750 | /* Make a copy of the original rows of matrix m. */ | |
38182d90 | 2751 | old_rows = alloca (m->nrows * sizeof *old_rows); |
72af86bd | 2752 | memcpy (old_rows, m->rows, m->nrows * sizeof *old_rows); |
5f5c8ee5 GM |
2753 | |
2754 | for (i = 0; i < nlines; ++i) | |
2755 | { | |
2756 | /* Frame relative line assigned to. */ | |
2757 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 2758 | |
5f5c8ee5 GM |
2759 | /* Frame relative line assigned. */ |
2760 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 2761 | |
5f5c8ee5 GM |
2762 | /* Window relative line assigned to. */ |
2763 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 2764 | |
5f5c8ee5 GM |
2765 | /* Window relative line assigned. */ |
2766 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 2767 | |
5f5c8ee5 | 2768 | /* Is assigned line inside window? */ |
59ea14cd | 2769 | bool from_inside_window_p |
5f5c8ee5 | 2770 | = window_from >= 0 && window_from < m->matrix_h; |
177c0ea7 | 2771 | |
a13396c9 | 2772 | /* Is assigned to line inside window? */ |
59ea14cd | 2773 | bool to_inside_window_p |
a13396c9 | 2774 | = window_to >= 0 && window_to < m->matrix_h; |
177c0ea7 | 2775 | |
a13396c9 | 2776 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 2777 | { |
5f5c8ee5 GM |
2778 | /* Do the assignment. The enabled_p flag is saved |
2779 | over the assignment because the old redisplay did | |
2780 | that. */ | |
59ea14cd | 2781 | bool enabled_before_p = m->rows[window_to].enabled_p; |
5f5c8ee5 GM |
2782 | m->rows[window_to] = old_rows[window_from]; |
2783 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 2784 | |
5f5c8ee5 GM |
2785 | /* If frame line is empty, window line is empty, too. */ |
2786 | if (!retained_p[copy_from[i]]) | |
2787 | m->rows[window_to].enabled_p = 0; | |
2788 | } | |
a13396c9 GM |
2789 | else if (to_inside_window_p) |
2790 | { | |
2791 | /* A copy between windows. This is an infrequent | |
2792 | case not worth optimizing. */ | |
d3d50620 | 2793 | struct frame *f = XFRAME (w->frame); |
a13396c9 GM |
2794 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
2795 | struct window *w2; | |
2796 | struct glyph_matrix *m2; | |
2797 | int m2_from; | |
2798 | ||
fe8b8401 | 2799 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
2800 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
2801 | -nw', FROM_FRAME sometimes has no associated window. | |
2802 | This check avoids a segfault if W2 is null. */ | |
2803 | if (w2) | |
2804 | { | |
2805 | m2 = w2->current_matrix; | |
2806 | m2_from = frame_from - m2->matrix_y; | |
2807 | copy_row_except_pointers (m->rows + window_to, | |
2808 | m2->rows + m2_from); | |
2809 | ||
2810 | /* If frame line is empty, window line is empty, too. */ | |
2811 | if (!retained_p[copy_from[i]]) | |
2812 | m->rows[window_to].enabled_p = 0; | |
2813 | } | |
a13396c9 GM |
2814 | sync_p = 1; |
2815 | } | |
2816 | else if (from_inside_window_p) | |
2817 | sync_p = 1; | |
5f5c8ee5 | 2818 | } |
a13396c9 GM |
2819 | |
2820 | /* If there was a copy between windows, make sure glyph | |
2821 | pointers are in sync with the frame matrix. */ | |
2822 | if (sync_p) | |
2823 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 2824 | |
5f5c8ee5 GM |
2825 | /* Check that no pointers are lost. */ |
2826 | CHECK_MATRIX (m); | |
2827 | } | |
2828 | ||
2829 | /* Next window on same level. */ | |
d3d50620 | 2830 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2831 | } |
2832 | } | |
2833 | ||
2834 | ||
e509cfa6 | 2835 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
2836 | |
2837 | /* Check that window and frame matrices agree about their | |
2838 | understanding where glyphs of the rows are to find. For each | |
2839 | window in the window tree rooted at W, check that rows in the | |
2840 | matrices of leaf window agree with their frame matrices about | |
2841 | glyph pointers. */ | |
2842 | ||
85fece3e | 2843 | static void |
59fc5cf9 | 2844 | check_window_matrix_pointers (struct window *w) |
5f5c8ee5 GM |
2845 | { |
2846 | while (w) | |
2847 | { | |
e74aeda8 DA |
2848 | if (WINDOWP (w->contents)) |
2849 | check_window_matrix_pointers (XWINDOW (w->contents)); | |
5f5c8ee5 | 2850 | else |
60a8948a | 2851 | { |
d3d50620 | 2852 | struct frame *f = XFRAME (w->frame); |
5f5c8ee5 GM |
2853 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); |
2854 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 2855 | } |
177c0ea7 | 2856 | |
d3d50620 | 2857 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2858 | } |
2859 | } | |
2860 | ||
2861 | ||
2862 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
2863 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
2864 | each row in WINDOW_MATRIX check that it's a slice of the | |
2865 | corresponding frame row. If it isn't, abort. */ | |
2866 | ||
2867 | static void | |
59fc5cf9 AS |
2868 | check_matrix_pointers (struct glyph_matrix *window_matrix, |
2869 | struct glyph_matrix *frame_matrix) | |
5f5c8ee5 GM |
2870 | { |
2871 | /* Row number in WINDOW_MATRIX. */ | |
2872 | int i = 0; | |
2873 | ||
2874 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
2875 | int j = window_matrix->matrix_y; | |
2876 | ||
177c0ea7 | 2877 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
2878 | slice of the row in the frame matrix. If it isn't we didn't |
2879 | mirror an operation on the frame matrix correctly. */ | |
2880 | while (i < window_matrix->nrows) | |
2881 | { | |
2882 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
2883 | frame_matrix->rows + j)) | |
1088b922 | 2884 | emacs_abort (); |
5f5c8ee5 GM |
2885 | ++i, ++j; |
2886 | } | |
2887 | } | |
2888 | ||
e509cfa6 | 2889 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
2890 | |
2891 | ||
2892 | \f | |
2893 | /********************************************************************** | |
2894 | VPOS and HPOS translations | |
2895 | **********************************************************************/ | |
2896 | ||
e509cfa6 | 2897 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
2898 | |
2899 | /* Translate vertical position VPOS which is relative to window W to a | |
2900 | vertical position relative to W's frame. */ | |
2901 | ||
2902 | static int | |
59fc5cf9 | 2903 | window_to_frame_vpos (struct window *w, int vpos) |
5f5c8ee5 | 2904 | { |
d3d50620 | 2905 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
a54e2c05 | 2906 | eassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); |
7df02016 | 2907 | vpos += WINDOW_TOP_EDGE_LINE (w); |
d3d50620 | 2908 | eassert (vpos >= 0 && vpos <= FRAME_LINES (XFRAME (w->frame))); |
5f5c8ee5 GM |
2909 | return vpos; |
2910 | } | |
2911 | ||
2912 | ||
2913 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 2914 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
2915 | |
2916 | static int | |
59fc5cf9 | 2917 | window_to_frame_hpos (struct window *w, int hpos) |
5f5c8ee5 | 2918 | { |
d3d50620 | 2919 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 2920 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
2921 | return hpos; |
2922 | } | |
177c0ea7 | 2923 | |
5f5c8ee5 GM |
2924 | #endif /* GLYPH_DEBUG */ |
2925 | ||
2926 | ||
2927 | \f | |
2928 | /********************************************************************** | |
2929 | Redrawing Frames | |
2930 | **********************************************************************/ | |
2931 | ||
2a14f83b | 2932 | /* Redraw frame F. */ |
5f5c8ee5 | 2933 | |
2a14f83b DA |
2934 | void |
2935 | redraw_frame (struct frame *f) | |
2936 | { | |
2937 | /* Error if F has no glyphs. */ | |
2938 | eassert (f->glyphs_initialized_p); | |
5f5c8ee5 | 2939 | update_begin (f); |
f2adda5e | 2940 | if (FRAME_MSDOS_P (f)) |
79d39b69 | 2941 | FRAME_TERMINAL (f)->set_terminal_modes_hook (FRAME_TERMINAL (f)); |
385ed61f | 2942 | clear_frame (f); |
5f5c8ee5 GM |
2943 | clear_current_matrices (f); |
2944 | update_end (f); | |
5f5c8ee5 GM |
2945 | windows_or_buffers_changed++; |
2946 | /* Mark all windows as inaccurate, so that every window will have | |
2947 | its redisplay done. */ | |
2948 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
ecab13d4 | 2949 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), NULL, 1); |
5f5c8ee5 | 2950 | f->garbaged = 0; |
5f5c8ee5 GM |
2951 | } |
2952 | ||
2a14f83b DA |
2953 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 0, 1, 0, |
2954 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. | |
2955 | If FRAME is omitted or nil, the selected frame is used. */) | |
2956 | (Lisp_Object frame) | |
5f5c8ee5 | 2957 | { |
2a14f83b DA |
2958 | redraw_frame (decode_live_frame (frame)); |
2959 | return Qnil; | |
5f5c8ee5 GM |
2960 | } |
2961 | ||
5f5c8ee5 | 2962 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", |
7ee72033 | 2963 | doc: /* Clear and redisplay all visible frames. */) |
5842a27b | 2964 | (void) |
5f5c8ee5 GM |
2965 | { |
2966 | Lisp_Object tail, frame; | |
2967 | ||
2968 | FOR_EACH_FRAME (tail, frame) | |
2969 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
2a14f83b | 2970 | redraw_frame (XFRAME (frame)); |
5f5c8ee5 GM |
2971 | |
2972 | return Qnil; | |
2973 | } | |
2974 | ||
2975 | ||
5f5c8ee5 | 2976 | \f |
5f5c8ee5 GM |
2977 | /*********************************************************************** |
2978 | Frame Update | |
2979 | ***********************************************************************/ | |
4588ec20 | 2980 | |
5f5c8ee5 | 2981 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 2982 | |
59ea14cd PE |
2983 | If FORCE_P, don't let redisplay be stopped by detecting pending input. |
2984 | If INHIBIT_HAIRY_ID_P, don't try scrolling. | |
177c0ea7 | 2985 | |
59ea14cd | 2986 | Value is true if redisplay was stopped due to pending input. */ |
4588ec20 | 2987 | |
59ea14cd PE |
2988 | bool |
2989 | update_frame (struct frame *f, bool force_p, bool inhibit_hairy_id_p) | |
5f5c8ee5 | 2990 | { |
59ea14cd PE |
2991 | /* True means display has been paused because of pending input. */ |
2992 | bool paused_p; | |
e69b0960 | 2993 | struct window *root_window = XWINDOW (f->root_window); |
5f5c8ee5 | 2994 | |
a2130dbb KS |
2995 | if (redisplay_dont_pause) |
2996 | force_p = 1; | |
6fd326b7 | 2997 | else if (!force_p && detect_input_pending_ignore_squeezables ()) |
d012c62b | 2998 | { |
6fd326b7 DA |
2999 | paused_p = 1; |
3000 | goto do_pause; | |
d012c62b | 3001 | } |
d012c62b | 3002 | |
5f5c8ee5 | 3003 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3004 | { |
5f5c8ee5 GM |
3005 | /* We are working on window matrix basis. All windows whose |
3006 | flag must_be_updated_p is set have to be updated. */ | |
3007 | ||
3008 | /* Record that we are not working on frame matrices. */ | |
3009 | set_frame_matrix_frame (NULL); | |
3010 | ||
3011 | /* Update all windows in the window tree of F, maybe stopping | |
3012 | when pending input is detected. */ | |
3013 | update_begin (f); | |
3014 | ||
5a49b79c | 3015 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
3016 | /* Update the menu bar on X frames that don't have toolkit |
3017 | support. */ | |
e69b0960 DA |
3018 | if (WINDOWP (f->menu_bar_window)) |
3019 | update_window (XWINDOW (f->menu_bar_window), 1); | |
5a49b79c | 3020 | #endif |
5f5c8ee5 | 3021 | |
742516e0 | 3022 | #if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS) |
5f5c8ee5 | 3023 | /* Update the tool-bar window, if present. */ |
e69b0960 | 3024 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3025 | { |
e69b0960 | 3026 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3027 | |
3028 | /* Update tool-bar window. */ | |
3029 | if (w->must_be_updated_p) | |
4588ec20 | 3030 | { |
153a073c PJ |
3031 | Lisp_Object tem; |
3032 | ||
5f5c8ee5 GM |
3033 | update_window (w, 1); |
3034 | w->must_be_updated_p = 0; | |
3035 | ||
3036 | /* Swap tool-bar strings. We swap because we want to | |
3037 | reuse strings. */ | |
e69b0960 | 3038 | tem = f->current_tool_bar_string; |
f00af5b1 PE |
3039 | fset_current_tool_bar_string (f, f->desired_tool_bar_string); |
3040 | fset_desired_tool_bar_string (f, tem); | |
4588ec20 JB |
3041 | } |
3042 | } | |
742516e0 | 3043 | #endif |
5f5c8ee5 GM |
3044 | |
3045 | /* Update windows. */ | |
3046 | paused_p = update_window_tree (root_window, force_p); | |
3047 | update_end (f); | |
4588ec20 | 3048 | } |
5f5c8ee5 GM |
3049 | else |
3050 | { | |
3051 | /* We are working on frame matrix basis. Set the frame on whose | |
3052 | frame matrix we operate. */ | |
3053 | set_frame_matrix_frame (f); | |
3054 | ||
868dd24b | 3055 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3056 | build_frame_matrix (f); |
177c0ea7 | 3057 | |
868dd24b GM |
3058 | /* Update the display */ |
3059 | update_begin (f); | |
5f5c8ee5 | 3060 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3061 | update_end (f); |
3062 | ||
7d2f1216 | 3063 | if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f)) |
3224dac1 | 3064 | { |
0b0d3e0b KL |
3065 | if (FRAME_TTY (f)->termscript) |
3066 | fflush (FRAME_TTY (f)->termscript); | |
7d2f1216 EZ |
3067 | if (FRAME_TERMCAP_P (f)) |
3068 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3069 | } |
868dd24b | 3070 | |
5f5c8ee5 | 3071 | /* Check window matrices for lost pointers. */ |
e509cfa6 | 3072 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
3073 | check_window_matrix_pointers (root_window); |
3074 | add_frame_display_history (f, paused_p); | |
3075 | #endif | |
5f5c8ee5 GM |
3076 | } |
3077 | ||
993d4ab6 | 3078 | do_pause: |
5f5c8ee5 | 3079 | /* Reset flags indicating that a window should be updated. */ |
ecab13d4 | 3080 | set_window_update_flags (root_window, NULL, 0); |
177c0ea7 | 3081 | |
868dd24b | 3082 | display_completed = !paused_p; |
5f5c8ee5 | 3083 | return paused_p; |
4588ec20 | 3084 | } |
5f5c8ee5 | 3085 | |
b5e9cbb6 EZ |
3086 | /* Update a TTY frame F that has a menu dropped down over some of its |
3087 | glyphs. This is like the second part of update_frame, but it | |
3088 | doesn't call build_frame_matrix, because we already have the | |
3089 | desired matrix prepared, and don't want it to be overwritten by the | |
3090 | text of the normal display. */ | |
3091 | void | |
3092 | update_frame_with_menu (struct frame *f) | |
3093 | { | |
3094 | struct window *root_window = XWINDOW (f->root_window); | |
e7873136 | 3095 | bool paused_p; |
b5e9cbb6 | 3096 | |
e7873136 | 3097 | eassert (FRAME_TERMCAP_P (f)); |
b5e9cbb6 EZ |
3098 | |
3099 | /* We are working on frame matrix basis. Set the frame on whose | |
3100 | frame matrix we operate. */ | |
3101 | set_frame_matrix_frame (f); | |
3102 | ||
3103 | /* Update the display */ | |
3104 | update_begin (f); | |
141f1ff7 EZ |
3105 | /* Force update_frame_1 not to stop due to pending input, and not |
3106 | try scrolling. */ | |
b5e9cbb6 EZ |
3107 | paused_p = update_frame_1 (f, 1, 1); |
3108 | update_end (f); | |
3109 | ||
3110 | if (FRAME_TTY (f)->termscript) | |
3111 | fflush (FRAME_TTY (f)->termscript); | |
3112 | fflush (FRAME_TTY (f)->output); | |
3113 | /* Check window matrices for lost pointers. */ | |
3114 | #if GLYPH_DEBUG | |
ffc3882f EZ |
3115 | #if 0 |
3116 | /* We cannot possibly survive the matrix pointers check, since | |
3117 | we have overwritten parts of the frame glyph matrix without | |
3118 | making any updates to the window matrices. */ | |
b5e9cbb6 | 3119 | check_window_matrix_pointers (root_window); |
ffc3882f | 3120 | #endif |
b5e9cbb6 | 3121 | add_frame_display_history (f, paused_p); |
3b158d11 PE |
3122 | #else |
3123 | IF_LINT ((void) paused_p); | |
b5e9cbb6 EZ |
3124 | #endif |
3125 | ||
3126 | /* Reset flags indicating that a window should be updated. */ | |
4ed77415 | 3127 | set_window_update_flags (root_window, NULL, 0); |
b5e9cbb6 | 3128 | } |
5f5c8ee5 | 3129 | |
4588ec20 | 3130 | \f |
5f5c8ee5 GM |
3131 | /************************************************************************ |
3132 | Window-based updates | |
3133 | ************************************************************************/ | |
3134 | ||
59ea14cd PE |
3135 | /* Perform updates in window tree rooted at W. |
3136 | If FORCE_P, don't stop updating if input is pending. */ | |
5f5c8ee5 | 3137 | |
59ea14cd PE |
3138 | static bool |
3139 | update_window_tree (struct window *w, bool force_p) | |
5f5c8ee5 | 3140 | { |
59ea14cd | 3141 | bool paused_p = 0; |
177c0ea7 | 3142 | |
5f5c8ee5 GM |
3143 | while (w && !paused_p) |
3144 | { | |
e74aeda8 DA |
3145 | if (WINDOWP (w->contents)) |
3146 | paused_p |= update_window_tree (XWINDOW (w->contents), force_p); | |
5f5c8ee5 GM |
3147 | else if (w->must_be_updated_p) |
3148 | paused_p |= update_window (w, force_p); | |
3149 | ||
d3d50620 | 3150 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
3151 | } |
3152 | ||
3153 | return paused_p; | |
3154 | } | |
3155 | ||
3156 | ||
59ea14cd PE |
3157 | /* Update window W if its flag must_be_updated_p is set. |
3158 | If FORCE_P, don't stop updating if input is pending. */ | |
5f5c8ee5 GM |
3159 | |
3160 | void | |
59ea14cd | 3161 | update_single_window (struct window *w, bool force_p) |
5f5c8ee5 GM |
3162 | { |
3163 | if (w->must_be_updated_p) | |
3164 | { | |
3165 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
3166 | ||
3167 | /* Record that this is not a frame-based redisplay. */ | |
3168 | set_frame_matrix_frame (NULL); | |
3169 | ||
a2130dbb KS |
3170 | if (redisplay_dont_pause) |
3171 | force_p = 1; | |
d012c62b | 3172 | |
5f5c8ee5 GM |
3173 | /* Update W. */ |
3174 | update_begin (f); | |
3175 | update_window (w, force_p); | |
3176 | update_end (f); | |
4588ec20 | 3177 | |
5f5c8ee5 GM |
3178 | /* Reset flag in W. */ |
3179 | w->must_be_updated_p = 0; | |
3180 | } | |
3181 | } | |
4588ec20 | 3182 | |
93e023fc | 3183 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 3184 | |
408f5064 GM |
3185 | /* Redraw lines from the current matrix of window W that are |
3186 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
3187 | ||
3188 | static void | |
971de7fb | 3189 | redraw_overlapped_rows (struct window *w, int yb) |
408f5064 | 3190 | { |
d8ee7803 | 3191 | int i; |
fa971ac3 | 3192 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3fc809e2 | 3193 | |
408f5064 GM |
3194 | /* If rows overlapping others have been changed, the rows being |
3195 | overlapped have to be redrawn. This won't draw lines that have | |
3196 | already been drawn in update_window_line because overlapped_p in | |
3197 | desired rows is 0, so after row assignment overlapped_p in | |
3198 | current rows is 0. */ | |
3199 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
3200 | { | |
e876ff42 | 3201 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
3202 | |
3203 | if (!row->enabled_p) | |
3204 | break; | |
3205 | else if (row->mode_line_p) | |
3206 | continue; | |
177c0ea7 | 3207 | |
408f5064 GM |
3208 | if (row->overlapped_p) |
3209 | { | |
3210 | enum glyph_row_area area; | |
177c0ea7 | 3211 | |
408f5064 GM |
3212 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
3213 | { | |
f60e429a DA |
3214 | output_cursor_to (w, i, 0, row->y, |
3215 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 3216 | if (row->used[area]) |
7f780da6 DA |
3217 | FRAME_RIF (f)->write_glyphs (w, row, row->glyphs[area], |
3218 | area, row->used[area]); | |
3219 | FRAME_RIF (f)->clear_end_of_line (w, row, area, -1); | |
408f5064 | 3220 | } |
177c0ea7 | 3221 | |
408f5064 GM |
3222 | row->overlapped_p = 0; |
3223 | } | |
3224 | ||
e876ff42 | 3225 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
3226 | break; |
3227 | } | |
3228 | } | |
3229 | ||
3230 | ||
3231 | /* Redraw lines from the current matrix of window W that overlap | |
3232 | others. YB is bottom-most y-position in W. */ | |
3233 | ||
3234 | static void | |
971de7fb | 3235 | redraw_overlapping_rows (struct window *w, int yb) |
408f5064 GM |
3236 | { |
3237 | int i, bottom_y; | |
3238 | struct glyph_row *row; | |
fa971ac3 | 3239 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
3fc809e2 | 3240 | |
408f5064 GM |
3241 | for (i = 0; i < w->current_matrix->nrows; ++i) |
3242 | { | |
3243 | row = w->current_matrix->rows + i; | |
3244 | ||
3245 | if (!row->enabled_p) | |
3246 | break; | |
3247 | else if (row->mode_line_p) | |
3248 | continue; | |
177c0ea7 | 3249 | |
408f5064 GM |
3250 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
3251 | ||
b4b2c2ca | 3252 | if (row->overlapping_p) |
408f5064 | 3253 | { |
41124e06 YM |
3254 | int overlaps = 0; |
3255 | ||
b4b2c2ca | 3256 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) && i > 0 |
41124e06 YM |
3257 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) |
3258 | overlaps |= OVERLAPS_PRED; | |
b4b2c2ca | 3259 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) && bottom_y < yb |
41124e06 YM |
3260 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) |
3261 | overlaps |= OVERLAPS_SUCC; | |
3262 | ||
3263 | if (overlaps) | |
3264 | { | |
3265 | if (row->used[LEFT_MARGIN_AREA]) | |
3266 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
3267 | ||
3268 | if (row->used[TEXT_AREA]) | |
3269 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
3270 | ||
3271 | if (row->used[RIGHT_MARGIN_AREA]) | |
3272 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
3273 | ||
c5e87d10 | 3274 | /* Record in neighbor rows that ROW overwrites part of |
41124e06 YM |
3275 | their display. */ |
3276 | if (overlaps & OVERLAPS_PRED) | |
3277 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
3278 | if (overlaps & OVERLAPS_SUCC) | |
3279 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
3280 | } | |
408f5064 GM |
3281 | } |
3282 | ||
3283 | if (bottom_y >= yb) | |
3284 | break; | |
3285 | } | |
3286 | } | |
3287 | ||
93e023fc KS |
3288 | #endif /* HAVE_WINDOW_SYSTEM */ |
3289 | ||
408f5064 | 3290 | |
09ad5a91 | 3291 | #if defined GLYPH_DEBUG && 0 |
93962bfa GM |
3292 | |
3293 | /* Check that no row in the current matrix of window W is enabled | |
3294 | which is below what's displayed in the window. */ | |
3295 | ||
09ad5a91 | 3296 | static void |
971de7fb | 3297 | check_current_matrix_flags (struct window *w) |
93962bfa | 3298 | { |
59ea14cd | 3299 | bool last_seen_p = 0; |
93962bfa GM |
3300 | int i, yb = window_text_bottom_y (w); |
3301 | ||
3302 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
3303 | { | |
3304 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
3305 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3306 | last_seen_p = 1; | |
3307 | else if (last_seen_p && row->enabled_p) | |
1088b922 | 3308 | emacs_abort (); |
93962bfa GM |
3309 | } |
3310 | } | |
3311 | ||
3312 | #endif /* GLYPH_DEBUG */ | |
3313 | ||
3314 | ||
59ea14cd PE |
3315 | /* Update display of window W. |
3316 | If FORCE_P, don't stop updating when input is pending. */ | |
5f5c8ee5 | 3317 | |
59ea14cd PE |
3318 | static bool |
3319 | update_window (struct window *w, bool force_p) | |
4588ec20 | 3320 | { |
5f5c8ee5 | 3321 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
59ea14cd | 3322 | bool paused_p; |
5f5c8ee5 | 3323 | int preempt_count = baud_rate / 2400 + 1; |
597cfb3f | 3324 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
e509cfa6 | 3325 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 3326 | /* Check that W's frame doesn't have glyph matrices. */ |
a54e2c05 | 3327 | eassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 3328 | #endif |
5f5c8ee5 GM |
3329 | |
3330 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb | 3331 | if (!force_p) |
a2d5fca0 | 3332 | detect_input_pending_ignore_squeezables (); |
4588ec20 | 3333 | |
5f5c8ee5 GM |
3334 | /* If forced to complete the update, or if no input is pending, do |
3335 | the update. */ | |
8fd9a666 | 3336 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 3337 | { |
5f5c8ee5 GM |
3338 | struct glyph_row *row, *end; |
3339 | struct glyph_row *mode_line_row; | |
56974e03 | 3340 | struct glyph_row *header_line_row; |
59ea14cd PE |
3341 | int yb; |
3342 | bool changed_p = 0, mouse_face_overwritten_p = 0; | |
0bc32927 | 3343 | int n_updated = 0; |
5f5c8ee5 GM |
3344 | |
3345 | rif->update_window_begin_hook (w); | |
3346 | yb = window_text_bottom_y (w); | |
138c0ae8 EZ |
3347 | row = MATRIX_ROW (desired_matrix, 0); |
3348 | end = MATRIX_MODE_LINE_ROW (desired_matrix); | |
177c0ea7 | 3349 | |
394305db EZ |
3350 | /* Take note of the header line, if there is one. We will |
3351 | update it below, after updating all of the window's lines. */ | |
5f5c8ee5 | 3352 | if (row->mode_line_p) |
56974e03 GM |
3353 | { |
3354 | header_line_row = row; | |
3355 | ++row; | |
3356 | } | |
3357 | else | |
3358 | header_line_row = NULL; | |
5f5c8ee5 GM |
3359 | |
3360 | /* Update the mode line, if necessary. */ | |
3361 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
3362 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
3363 | { | |
3364 | mode_line_row->y = yb; | |
3365 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
3366 | desired_matrix), |
3367 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3368 | } |
3369 | ||
3370 | /* Find first enabled row. Optimizations in redisplay_internal | |
3371 | may lead to an update with only one row enabled. There may | |
3372 | be also completely empty matrices. */ | |
3373 | while (row < end && !row->enabled_p) | |
3374 | ++row; | |
177c0ea7 | 3375 | |
bfdcafe1 | 3376 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 3377 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
3378 | { |
3379 | int rc = scrolling_window (w, header_line_row != NULL); | |
3380 | if (rc < 0) | |
3381 | { | |
3382 | /* All rows were found to be equal. */ | |
3383 | paused_p = 0; | |
3384 | goto set_cursor; | |
3385 | } | |
3386 | else if (rc > 0) | |
6b61353c KH |
3387 | { |
3388 | /* We've scrolled the display. */ | |
3389 | force_p = 1; | |
3390 | changed_p = 1; | |
3391 | } | |
5f5c8ee5 GM |
3392 | } |
3393 | ||
3394 | /* Update the rest of the lines. */ | |
0bc32927 | 3395 | for (; row < end && (force_p || !input_pending); ++row) |
394305db EZ |
3396 | /* scrolling_window resets the enabled_p flag of the rows it |
3397 | reuses from current_matrix. */ | |
b7412313 | 3398 | if (row->enabled_p) |
5f5c8ee5 GM |
3399 | { |
3400 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
3401 | int i; | |
177c0ea7 | 3402 | |
153a073c | 3403 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
3404 | detect_input_pending. If it's done too often, |
3405 | scrolling large windows with repeated scroll-up | |
3406 | commands will too quickly pause redisplay. */ | |
e87b8809 | 3407 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 3408 | detect_input_pending_ignore_squeezables (); |
e876ff42 GM |
3409 | changed_p |= update_window_line (w, vpos, |
3410 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3411 | |
3412 | /* Mark all rows below the last visible one in the current | |
3413 | matrix as invalid. This is necessary because of | |
3414 | variable line heights. Consider the case of three | |
3415 | successive redisplays, where the first displays 5 | |
3416 | lines, the second 3 lines, and the third 5 lines again. | |
3417 | If the second redisplay wouldn't mark rows in the | |
3418 | current matrix invalid, the third redisplay might be | |
3419 | tempted to optimize redisplay based on lines displayed | |
3420 | in the first redisplay. */ | |
3421 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3422 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
3423 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
3424 | } | |
3425 | ||
3426 | /* Was display preempted? */ | |
3427 | paused_p = row < end; | |
177c0ea7 | 3428 | |
56974e03 | 3429 | set_cursor: |
177c0ea7 | 3430 | |
6b61353c KH |
3431 | /* Update the header line after scrolling because a new header |
3432 | line would otherwise overwrite lines at the top of the window | |
3433 | that can be scrolled. */ | |
3434 | if (header_line_row && header_line_row->enabled_p) | |
3435 | { | |
3436 | header_line_row->y = 0; | |
3437 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
6b61353c KH |
3438 | } |
3439 | ||
153a073c | 3440 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
3441 | if (!paused_p && !w->pseudo_window_p) |
3442 | { | |
93e023fc | 3443 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
3444 | if (changed_p && rif->fix_overlapping_area) |
3445 | { | |
3446 | redraw_overlapped_rows (w, yb); | |
3447 | redraw_overlapping_rows (w, yb); | |
3448 | } | |
93e023fc | 3449 | #endif |
177c0ea7 | 3450 | |
5f5c8ee5 GM |
3451 | /* Make cursor visible at cursor position of W. */ |
3452 | set_window_cursor_after_update (w); | |
3453 | ||
e876ff42 GM |
3454 | #if 0 /* Check that current matrix invariants are satisfied. This is |
3455 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
3456 | IF_DEBUG (check_matrix_invariants (w)); |
3457 | #endif | |
4588ec20 | 3458 | } |
5f5c8ee5 | 3459 | |
e509cfa6 | 3460 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
3461 | /* Remember the redisplay method used to display the matrix. */ |
3462 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
3463 | #endif | |
408f5064 | 3464 | |
6b61353c KH |
3465 | #ifdef HAVE_WINDOW_SYSTEM |
3466 | update_window_fringes (w, 0); | |
3467 | #endif | |
3468 | ||
56974e03 GM |
3469 | /* End the update of window W. Don't set the cursor if we |
3470 | paused updating the display because in this case, | |
3471 | set_window_cursor_after_update hasn't been called, and | |
f60e429a | 3472 | W->output_cursor doesn't contain the cursor location. */ |
56974e03 | 3473 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); |
4588ec20 | 3474 | } |
5f5c8ee5 GM |
3475 | else |
3476 | paused_p = 1; | |
3477 | ||
e509cfa6 | 3478 | #ifdef GLYPH_DEBUG |
0cffd9d8 | 3479 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
3480 | add_window_display_history (w, w->current_matrix->method, paused_p); |
3481 | #endif | |
177c0ea7 | 3482 | |
5f5c8ee5 | 3483 | clear_glyph_matrix (desired_matrix); |
408f5064 | 3484 | |
5f5c8ee5 | 3485 | return paused_p; |
4588ec20 JB |
3486 | } |
3487 | ||
b64b3980 | 3488 | |
5f5c8ee5 GM |
3489 | /* Update the display of area AREA in window W, row number VPOS. |
3490 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
3491 | ||
3492 | static void | |
7f780da6 DA |
3493 | update_marginal_area (struct window *w, struct glyph_row *updated_row, |
3494 | enum glyph_row_area area, int vpos) | |
b64b3980 | 3495 | { |
5f5c8ee5 | 3496 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 3497 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 | 3498 | |
5f5c8ee5 GM |
3499 | /* Set cursor to start of glyphs, write them, and clear to the end |
3500 | of the area. I don't think that something more sophisticated is | |
3501 | necessary here, since marginal areas will not be the default. */ | |
f60e429a | 3502 | output_cursor_to (w, vpos, 0, desired_row->y, 0); |
5f5c8ee5 | 3503 | if (desired_row->used[area]) |
7f780da6 DA |
3504 | rif->write_glyphs (w, updated_row, desired_row->glyphs[area], |
3505 | area, desired_row->used[area]); | |
3506 | rif->clear_end_of_line (w, updated_row, area, -1); | |
b64b3980 | 3507 | } |
23b0200c | 3508 | |
352f1545 | 3509 | |
408f5064 | 3510 | /* Update the display of the text area of row VPOS in window W. |
59ea14cd | 3511 | Value is true if display has changed. */ |
5f5c8ee5 | 3512 | |
59ea14cd | 3513 | static bool |
7f780da6 | 3514 | update_text_area (struct window *w, struct glyph_row *updated_row, int vpos) |
23b0200c | 3515 | { |
5f5c8ee5 GM |
3516 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
3517 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3518 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
59ea14cd | 3519 | bool changed_p = 0; |
5f5c8ee5 | 3520 | |
5f5c8ee5 GM |
3521 | /* If rows are at different X or Y, or rows have different height, |
3522 | or the current row is marked invalid, write the entire line. */ | |
3523 | if (!current_row->enabled_p | |
3524 | || desired_row->y != current_row->y | |
3525 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
3526 | || desired_row->phys_ascent != current_row->phys_ascent |
3527 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 3528 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 3529 | || current_row->overlapped_p |
fee8b690 CY |
3530 | /* This next line is necessary for correctly redrawing |
3531 | mouse-face areas after scrolling and other operations. | |
3532 | However, it causes excessive flickering when mouse is moved | |
3533 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
3534 | line doesn't seem to hurt anything. -- cyd. |
3535 | But it is still needed for the header line. -- kfs. */ | |
3536 | || (current_row->mouse_face_p | |
3537 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
3538 | || current_row->x != desired_row->x) |
3539 | { | |
f60e429a | 3540 | output_cursor_to (w, vpos, 0, desired_row->y, desired_row->x); |
177c0ea7 | 3541 | |
5f5c8ee5 | 3542 | if (desired_row->used[TEXT_AREA]) |
7f780da6 DA |
3543 | rif->write_glyphs (w, updated_row, desired_row->glyphs[TEXT_AREA], |
3544 | TEXT_AREA, desired_row->used[TEXT_AREA]); | |
177c0ea7 | 3545 | |
5f5c8ee5 | 3546 | /* Clear to end of window. */ |
7f780da6 | 3547 | rif->clear_end_of_line (w, updated_row, TEXT_AREA, -1); |
408f5064 | 3548 | changed_p = 1; |
60f2f3f1 GM |
3549 | |
3550 | /* This erases the cursor. We do this here because | |
3551 | notice_overwritten_cursor cannot easily check this, which | |
3552 | might indicate that the whole functionality of | |
3553 | notice_overwritten_cursor would better be implemented here. | |
3554 | On the other hand, we need notice_overwritten_cursor as long | |
3555 | as mouse highlighting is done asynchronously outside of | |
3556 | redisplay. */ | |
3557 | if (vpos == w->phys_cursor.vpos) | |
3558 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
3559 | } |
3560 | else | |
3561 | { | |
3562 | int stop, i, x; | |
3563 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
3564 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
59ea14cd | 3565 | bool overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 3566 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
59ea14cd | 3567 | bool abort_skipping = 0; |
5f5c8ee5 | 3568 | |
78897758 YM |
3569 | /* If the desired row extends its face to the text area end, and |
3570 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
3571 | make sure we write at least one glyph, so that the face |
3572 | extension actually takes place. */ | |
78897758 YM |
3573 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
3574 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
3575 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
3576 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 3577 | --desired_stop_pos; |
177c0ea7 | 3578 | |
5f5c8ee5 GM |
3579 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
3580 | i = 0; | |
3581 | x = desired_row->x; | |
8399f8a0 GM |
3582 | |
3583 | /* Loop over glyphs that current and desired row may have | |
3584 | in common. */ | |
5f5c8ee5 | 3585 | while (i < stop) |
352f1545 | 3586 | { |
59ea14cd | 3587 | bool can_skip_p = !abort_skipping; |
177c0ea7 | 3588 | |
5f5c8ee5 | 3589 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
3590 | don't have to be written. We can't skip if the last |
3591 | current glyph overlaps the glyph to its right. For | |
3592 | example, consider a current row of `if ' with the `f' in | |
3593 | Courier bold so that it overlaps the ` ' to its right. | |
3594 | If the desired row is ` ', we would skip over the space | |
3595 | after the `if' and there would remain a pixel from the | |
3596 | `f' on the screen. */ | |
3597 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 3598 | { |
e47306e6 GM |
3599 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
3600 | int left, right; | |
177c0ea7 | 3601 | |
d3d50620 | 3602 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
e47306e6 | 3603 | &left, &right); |
91d227d9 | 3604 | can_skip_p = (right == 0 && !abort_skipping); |
352f1545 | 3605 | } |
177c0ea7 | 3606 | |
6d950f4c | 3607 | if (can_skip_p) |
352f1545 | 3608 | { |
91d227d9 CY |
3609 | int start_hpos = i; |
3610 | ||
6d950f4c GM |
3611 | while (i < stop |
3612 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
3613 | { | |
3614 | x += desired_glyph->pixel_width; | |
3615 | ++desired_glyph, ++current_glyph, ++i; | |
3616 | } | |
3617 | ||
3618 | /* Consider the case that the current row contains "xxx | |
3619 | ppp ggg" in italic Courier font, and the desired row | |
3620 | is "xxx ggg". The character `p' has lbearing, `g' | |
3621 | has not. The loop above will stop in front of the | |
3622 | first `p' in the current row. If we would start | |
3623 | writing glyphs there, we wouldn't erase the lbearing | |
3624 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 3625 | taken care of by draw_glyphs. */ |
6d950f4c GM |
3626 | if (overlapping_glyphs_p |
3627 | && i > 0 | |
3628 | && i < current_row->used[TEXT_AREA] | |
3629 | && (current_row->used[TEXT_AREA] | |
3630 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 3631 | { |
6d950f4c | 3632 | int left, right; |
177c0ea7 | 3633 | |
3a45383a | 3634 | rif->get_glyph_overhangs (current_glyph, |
d3d50620 | 3635 | XFRAME (w->frame), |
6d950f4c GM |
3636 | &left, &right); |
3637 | while (left > 0 && i > 0) | |
3638 | { | |
3639 | --i, --desired_glyph, --current_glyph; | |
3640 | x -= desired_glyph->pixel_width; | |
3641 | left -= desired_glyph->pixel_width; | |
3642 | } | |
91d227d9 CY |
3643 | |
3644 | /* Abort the skipping algorithm if we end up before | |
3645 | our starting point, to avoid looping (bug#1070). | |
3646 | This can happen when the lbearing is larger than | |
3647 | the pixel width. */ | |
3648 | abort_skipping = (i < start_hpos); | |
5f5c8ee5 | 3649 | } |
352f1545 | 3650 | } |
177c0ea7 | 3651 | |
5f5c8ee5 GM |
3652 | /* Try to avoid writing the entire rest of the desired row |
3653 | by looking for a resync point. This mainly prevents | |
3654 | mode line flickering in the case the mode line is in | |
3655 | fixed-pitch font, which it usually will be. */ | |
3656 | if (i < desired_row->used[TEXT_AREA]) | |
3657 | { | |
3658 | int start_x = x, start_hpos = i; | |
3659 | struct glyph *start = desired_glyph; | |
3660 | int current_x = x; | |
59ea14cd | 3661 | bool skip_first_p = !can_skip_p; |
6d950f4c | 3662 | |
5f5c8ee5 GM |
3663 | /* Find the next glyph that's equal again. */ |
3664 | while (i < stop | |
6d950f4c GM |
3665 | && (skip_first_p |
3666 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
3667 | && x == current_x) |
3668 | { | |
3669 | x += desired_glyph->pixel_width; | |
3670 | current_x += current_glyph->pixel_width; | |
3671 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 3672 | skip_first_p = 0; |
5f5c8ee5 | 3673 | } |
23b0200c | 3674 | |
5f5c8ee5 GM |
3675 | if (i == start_hpos || x != current_x) |
3676 | { | |
3677 | i = start_hpos; | |
3678 | x = start_x; | |
3679 | desired_glyph = start; | |
3680 | break; | |
3681 | } | |
e47306e6 | 3682 | |
f60e429a | 3683 | output_cursor_to (w, vpos, start_hpos, desired_row->y, start_x); |
7f780da6 DA |
3684 | rif->write_glyphs (w, updated_row, start, |
3685 | TEXT_AREA, i - start_hpos); | |
408f5064 | 3686 | changed_p = 1; |
5f5c8ee5 GM |
3687 | } |
3688 | } | |
177c0ea7 | 3689 | |
5f5c8ee5 GM |
3690 | /* Write the rest. */ |
3691 | if (i < desired_row->used[TEXT_AREA]) | |
3692 | { | |
f60e429a | 3693 | output_cursor_to (w, vpos, i, desired_row->y, x); |
7f780da6 DA |
3694 | rif->write_glyphs (w, updated_row, desired_glyph, |
3695 | TEXT_AREA, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 3696 | changed_p = 1; |
5f5c8ee5 | 3697 | } |
177c0ea7 | 3698 | |
5f5c8ee5 GM |
3699 | /* Maybe clear to end of line. */ |
3700 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
3701 | { | |
3702 | /* If new row extends to the end of the text area, nothing | |
3703 | has to be cleared, if and only if we did a write_glyphs | |
3704 | above. This is made sure by setting desired_stop_pos | |
3705 | appropriately above. */ | |
a54e2c05 | 3706 | eassert (i < desired_row->used[TEXT_AREA] |
78897758 YM |
3707 | || ((desired_row->used[TEXT_AREA] |
3708 | == current_row->used[TEXT_AREA]) | |
3709 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
3710 | } |
3711 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
3712 | { | |
3713 | /* If old row extends to the end of the text area, clear. */ | |
3714 | if (i >= desired_row->used[TEXT_AREA]) | |
f60e429a DA |
3715 | output_cursor_to (w, vpos, i, desired_row->y, |
3716 | desired_row->pixel_width); | |
7f780da6 | 3717 | rif->clear_end_of_line (w, updated_row, TEXT_AREA, -1); |
408f5064 | 3718 | changed_p = 1; |
5f5c8ee5 GM |
3719 | } |
3720 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 3721 | { |
5f5c8ee5 GM |
3722 | /* Otherwise clear to the end of the old row. Everything |
3723 | after that position should be clear already. */ | |
27786b2f | 3724 | int xlim; |
177c0ea7 | 3725 | |
5f5c8ee5 | 3726 | if (i >= desired_row->used[TEXT_AREA]) |
f60e429a DA |
3727 | output_cursor_to (w, vpos, i, desired_row->y, |
3728 | desired_row->pixel_width); | |
5f5c8ee5 GM |
3729 | |
3730 | /* If cursor is displayed at the end of the line, make sure | |
3731 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
3732 | with which to erase the cursor (because this method | |
3733 | doesn't work with lbearing/rbearing), so we must do it | |
3734 | this way. */ | |
3735 | if (vpos == w->phys_cursor.vpos | |
f951a506 EZ |
3736 | && (desired_row->reversed_p |
3737 | ? (w->phys_cursor.hpos < 0) | |
3738 | : (w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]))) | |
5f5c8ee5 GM |
3739 | { |
3740 | w->phys_cursor_on_p = 0; | |
27786b2f | 3741 | xlim = -1; |
5f5c8ee5 GM |
3742 | } |
3743 | else | |
27786b2f | 3744 | xlim = current_row->pixel_width; |
7f780da6 | 3745 | rif->clear_end_of_line (w, updated_row, TEXT_AREA, xlim); |
408f5064 | 3746 | changed_p = 1; |
2e8907d3 | 3747 | } |
23b0200c | 3748 | } |
408f5064 GM |
3749 | |
3750 | return changed_p; | |
23b0200c | 3751 | } |
4588ec20 | 3752 | |
5f5c8ee5 | 3753 | |
59ea14cd | 3754 | /* Update row VPOS in window W. Value is true if display has been changed. */ |
5f5c8ee5 | 3755 | |
59ea14cd PE |
3756 | static bool |
3757 | update_window_line (struct window *w, int vpos, bool *mouse_face_overwritten_p) | |
5f5c8ee5 GM |
3758 | { |
3759 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
3760 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3761 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
59ea14cd | 3762 | bool changed_p = 0; |
5f5c8ee5 | 3763 | |
177c0ea7 JB |
3764 | /* A row can be completely invisible in case a desired matrix was |
3765 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
3766 | the matrix. Make sure to make such rows current anyway, since |
3767 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
3768 | if (desired_row->mode_line_p |
3769 | || desired_row->visible_height > 0) | |
408f5064 | 3770 | { |
a54e2c05 | 3771 | eassert (desired_row->enabled_p); |
504805ac GM |
3772 | |
3773 | /* Update display of the left margin area, if there is one. */ | |
eeaf9bf3 | 3774 | if (!desired_row->full_width_p && w->left_margin_cols > 0) |
504805ac GM |
3775 | { |
3776 | changed_p = 1; | |
7f780da6 | 3777 | update_marginal_area (w, desired_row, LEFT_MARGIN_AREA, vpos); |
e9957956 EZ |
3778 | /* Setting this flag will ensure the vertical border, if |
3779 | any, between this window and the one on its left will be | |
3780 | redrawn. This is necessary because updating the left | |
3781 | margin area can potentially draw over the border. */ | |
3782 | current_row->redraw_fringe_bitmaps_p = 1; | |
504805ac | 3783 | } |
177c0ea7 | 3784 | |
504805ac | 3785 | /* Update the display of the text area. */ |
7f780da6 | 3786 | if (update_text_area (w, desired_row, vpos)) |
504805ac GM |
3787 | { |
3788 | changed_p = 1; | |
3789 | if (current_row->mouse_face_p) | |
3790 | *mouse_face_overwritten_p = 1; | |
3791 | } | |
177c0ea7 | 3792 | |
504805ac | 3793 | /* Update display of the right margin area, if there is one. */ |
eeaf9bf3 | 3794 | if (!desired_row->full_width_p && w->right_margin_cols > 0) |
504805ac GM |
3795 | { |
3796 | changed_p = 1; | |
7f780da6 | 3797 | update_marginal_area (w, desired_row, RIGHT_MARGIN_AREA, vpos); |
504805ac | 3798 | } |
177c0ea7 | 3799 | |
504805ac GM |
3800 | /* Draw truncation marks etc. */ |
3801 | if (!current_row->enabled_p | |
3802 | || desired_row->y != current_row->y | |
3803 | || desired_row->visible_height != current_row->visible_height | |
6b61353c | 3804 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 3805 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
6b61353c | 3806 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 3807 | || desired_row->mode_line_p != current_row->mode_line_p |
6b61353c | 3808 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
3809 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
3810 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
65620264 | 3811 | rif->after_update_window_line_hook (w, desired_row); |
408f5064 | 3812 | } |
177c0ea7 | 3813 | |
5f5c8ee5 GM |
3814 | /* Update current_row from desired_row. */ |
3815 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
408f5064 | 3816 | return changed_p; |
5f5c8ee5 GM |
3817 | } |
3818 | ||
3819 | ||
3820 | /* Set the cursor after an update of window W. This function may only | |
3821 | be called from update_window. */ | |
3822 | ||
3823 | static void | |
971de7fb | 3824 | set_window_cursor_after_update (struct window *w) |
4588ec20 | 3825 | { |
d3d50620 | 3826 | struct frame *f = XFRAME (w->frame); |
5f5c8ee5 GM |
3827 | int cx, cy, vpos, hpos; |
3828 | ||
3829 | /* Not intended for frame matrix updates. */ | |
a54e2c05 | 3830 | eassert (FRAME_WINDOW_P (f)); |
177c0ea7 | 3831 | |
b96fd3e8 GM |
3832 | if (cursor_in_echo_area |
3833 | && !NILP (echo_area_buffer[0]) | |
3834 | /* If we are showing a message instead of the mini-buffer, | |
3835 | show the cursor for the message instead. */ | |
3836 | && XWINDOW (minibuf_window) == w | |
3837 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
3838 | /* These cases apply only to the frame that contains |
3839 | the active mini-buffer window. */ | |
3840 | && FRAME_HAS_MINIBUF_P (f) | |
3841 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
3842 | { | |
3843 | cx = cy = vpos = hpos = 0; | |
3844 | ||
3845 | if (cursor_in_echo_area >= 0) | |
3846 | { | |
3847 | /* If the mini-buffer is several lines high, find the last | |
3848 | line that has any text on it. Note: either all lines | |
3849 | are enabled or none. Otherwise we wouldn't be able to | |
3850 | determine Y. */ | |
862b4790 GM |
3851 | struct glyph_row *row, *last_row; |
3852 | struct glyph *glyph; | |
3853 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 3854 | |
862b4790 | 3855 | last_row = NULL; |
6206f8ce GM |
3856 | row = w->current_matrix->rows; |
3857 | while (row->enabled_p | |
3858 | && (last_row == NULL | |
3859 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 3860 | { |
862b4790 GM |
3861 | if (row->used[TEXT_AREA] |
3862 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
3863 | last_row = row; | |
6206f8ce | 3864 | ++row; |
862b4790 | 3865 | } |
177c0ea7 | 3866 | |
5f5c8ee5 GM |
3867 | if (last_row) |
3868 | { | |
6206f8ce GM |
3869 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
3870 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 3871 | |
b96fd3e8 | 3872 | while (last > start && last->charpos < 0) |
862b4790 | 3873 | --last; |
177c0ea7 | 3874 | |
862b4790 GM |
3875 | for (glyph = start; glyph < last; ++glyph) |
3876 | { | |
3877 | cx += glyph->pixel_width; | |
3878 | ++hpos; | |
3879 | } | |
3880 | ||
5f5c8ee5 | 3881 | cy = last_row->y; |
862b4790 | 3882 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
3883 | } |
3884 | } | |
3885 | } | |
3886 | else | |
3887 | { | |
3888 | cx = w->cursor.x; | |
3889 | cy = w->cursor.y; | |
3890 | hpos = w->cursor.hpos; | |
3891 | vpos = w->cursor.vpos; | |
3892 | } | |
4588ec20 | 3893 | |
2dd61a9b | 3894 | /* Window cursor can be out of sync for horizontally split windows. |
cccaebd2 | 3895 | Horizontal position is -1 when cursor is on the left fringe. */ |
2dd61a9b DA |
3896 | hpos = clip_to_bounds (-1, hpos, w->current_matrix->matrix_w - 1); |
3897 | vpos = clip_to_bounds (0, vpos, w->current_matrix->nrows - 1); | |
f60e429a | 3898 | output_cursor_to (w, vpos, hpos, cy, cx); |
4588ec20 | 3899 | } |
4588ec20 | 3900 | |
5f5c8ee5 | 3901 | |
ecab13d4 DA |
3902 | /* If B is NULL, set WINDOW->must_be_updated_p to ON_P for all windows in |
3903 | the window tree rooted at W. Otherwise set WINDOW->must_be_updated_p | |
3904 | to ON_P only for windows that displays B. */ | |
6df5d75f GM |
3905 | |
3906 | void | |
ecab13d4 | 3907 | set_window_update_flags (struct window *w, struct buffer *b, bool on_p) |
6df5d75f GM |
3908 | { |
3909 | while (w) | |
3910 | { | |
e74aeda8 | 3911 | if (WINDOWP (w->contents)) |
ecab13d4 DA |
3912 | set_window_update_flags (XWINDOW (w->contents), b, on_p); |
3913 | else if (!(b && b != XBUFFER (w->contents))) | |
6df5d75f GM |
3914 | w->must_be_updated_p = on_p; |
3915 | ||
d3d50620 | 3916 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
6df5d75f | 3917 | } |
177c0ea7 | 3918 | } |
6df5d75f GM |
3919 | |
3920 | ||
3921 | \f | |
3922 | /*********************************************************************** | |
3923 | Window-Based Scrolling | |
3924 | ***********************************************************************/ | |
3925 | ||
3926 | /* Structure describing rows in scrolling_window. */ | |
3927 | ||
3928 | struct row_entry | |
3929 | { | |
3930 | /* Number of occurrences of this row in desired and current matrix. */ | |
3931 | int old_uses, new_uses; | |
177c0ea7 | 3932 | |
6df5d75f GM |
3933 | /* Vpos of row in new matrix. */ |
3934 | int new_line_number; | |
3935 | ||
3936 | /* Bucket index of this row_entry in the hash table row_table. */ | |
ca9ce8f2 | 3937 | ptrdiff_t bucket; |
177c0ea7 | 3938 | |
6df5d75f GM |
3939 | /* The row described by this entry. */ |
3940 | struct glyph_row *row; | |
177c0ea7 | 3941 | |
6df5d75f GM |
3942 | /* Hash collision chain. */ |
3943 | struct row_entry *next; | |
3944 | }; | |
3945 | ||
3946 | /* A pool to allocate row_entry structures from, and the size of the | |
3947 | pool. The pool is reallocated in scrolling_window when we find | |
3948 | that we need a larger one. */ | |
3949 | ||
3950 | static struct row_entry *row_entry_pool; | |
ca9ce8f2 | 3951 | static ptrdiff_t row_entry_pool_size; |
6df5d75f GM |
3952 | |
3953 | /* Index of next free entry in row_entry_pool. */ | |
3954 | ||
ca9ce8f2 | 3955 | static ptrdiff_t row_entry_idx; |
6df5d75f GM |
3956 | |
3957 | /* The hash table used during scrolling, and the table's size. This | |
3958 | table is used to quickly identify equal rows in the desired and | |
3959 | current matrix. */ | |
3960 | ||
3961 | static struct row_entry **row_table; | |
ca9ce8f2 | 3962 | static ptrdiff_t row_table_size; |
6df5d75f GM |
3963 | |
3964 | /* Vectors of pointers to row_entry structures belonging to the | |
3965 | current and desired matrix, and the size of the vectors. */ | |
3966 | ||
3967 | static struct row_entry **old_lines, **new_lines; | |
0065d054 | 3968 | static ptrdiff_t old_lines_size, new_lines_size; |
6df5d75f GM |
3969 | |
3970 | /* A pool to allocate run structures from, and its size. */ | |
3971 | ||
3972 | static struct run *run_pool; | |
0065d054 | 3973 | static ptrdiff_t runs_size; |
6df5d75f GM |
3974 | |
3975 | /* A vector of runs of lines found during scrolling. */ | |
3976 | ||
3977 | static struct run **runs; | |
3978 | ||
6b1f9ba4 | 3979 | /* Add glyph row ROW to the scrolling hash table. */ |
6df5d75f | 3980 | |
b0ab8123 | 3981 | static struct row_entry * |
6b1f9ba4 | 3982 | add_row_entry (struct glyph_row *row) |
6df5d75f GM |
3983 | { |
3984 | struct row_entry *entry; | |
ca9ce8f2 | 3985 | ptrdiff_t i = row->hash % row_table_size; |
177c0ea7 | 3986 | |
6df5d75f | 3987 | entry = row_table[i]; |
a54e2c05 | 3988 | eassert (entry || verify_row_hash (row)); |
6b1f9ba4 | 3989 | while (entry && !row_equal_p (entry->row, row, 1)) |
6df5d75f | 3990 | entry = entry->next; |
177c0ea7 | 3991 | |
6df5d75f GM |
3992 | if (entry == NULL) |
3993 | { | |
3994 | entry = row_entry_pool + row_entry_idx++; | |
3995 | entry->row = row; | |
3996 | entry->old_uses = entry->new_uses = 0; | |
3997 | entry->new_line_number = 0; | |
3998 | entry->bucket = i; | |
3999 | entry->next = row_table[i]; | |
4000 | row_table[i] = entry; | |
4001 | } | |
4002 | ||
4003 | return entry; | |
4004 | } | |
4005 | ||
4006 | ||
5f5c8ee5 | 4007 | /* Try to reuse part of the current display of W by scrolling lines. |
59ea14cd | 4008 | HEADER_LINE_P means W has a header line. |
5f5c8ee5 GM |
4009 | |
4010 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4011 | Technique for Isolating Differences Between Files." It should take | |
4012 | O(N) time. | |
4013 | ||
4014 | A short outline of the steps of the algorithm | |
4015 | ||
4016 | 1. Skip lines equal at the start and end of both matrices. | |
4017 | ||
4018 | 2. Enter rows in the current and desired matrix into a symbol | |
4019 | table, counting how often they appear in both matrices. | |
4020 | ||
4021 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4022 | i.e. we assume that such lines are likely to have been moved. | |
4023 | ||
4024 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4025 | forward and backward. | |
4026 | ||
4027 | Value is | |
4028 | ||
4029 | -1 if all rows were found to be equal. | |
4030 | 0 to indicate that we did not scroll the display, or | |
4031 | 1 if we did scroll. */ | |
4032 | ||
4033 | static int | |
59ea14cd | 4034 | scrolling_window (struct window *w, bool header_line_p) |
4588ec20 | 4035 | { |
5f5c8ee5 GM |
4036 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4037 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4038 | int yb = window_text_bottom_y (w); | |
ca9ce8f2 PE |
4039 | ptrdiff_t i; |
4040 | int j, first_old, first_new, last_old, last_new; | |
4041 | int nruns, run_idx; | |
0065d054 | 4042 | ptrdiff_t n; |
6df5d75f | 4043 | struct row_entry *entry; |
fa971ac3 | 4044 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4045 | |
4046 | /* Skip over rows equal at the start. */ | |
59ea14cd | 4047 | for (i = header_line_p; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4048 | { |
bfdcafe1 GM |
4049 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4050 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4051 | ||
4052 | if (c->enabled_p | |
4053 | && d->enabled_p | |
6b61353c | 4054 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4055 | && c->y == d->y |
4056 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4057 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
6b1f9ba4 | 4058 | && row_equal_p (c, d, 1)) |
bfdcafe1 GM |
4059 | { |
4060 | assign_row (c, d); | |
4061 | d->enabled_p = 0; | |
4062 | } | |
4063 | else | |
4064 | break; | |
5f5c8ee5 | 4065 | } |
4588ec20 | 4066 | |
5f5c8ee5 GM |
4067 | /* Give up if some rows in the desired matrix are not enabled. */ |
4068 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4069 | return -1; | |
177c0ea7 | 4070 | |
5f5c8ee5 GM |
4071 | first_old = first_new = i; |
4072 | ||
4d8ade89 YM |
4073 | /* Set last_new to the index + 1 of the row that reaches the |
4074 | bottom boundary in the desired matrix. Give up if we find a | |
4075 | disabled row before we reach the bottom boundary. */ | |
5f5c8ee5 | 4076 | i = first_new + 1; |
4d8ade89 YM |
4077 | while (i < desired_matrix->nrows - 1) |
4078 | { | |
4079 | int bottom; | |
5f5c8ee5 | 4080 | |
4d8ade89 YM |
4081 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) |
4082 | return 0; | |
4083 | bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)); | |
4084 | if (bottom <= yb) | |
4085 | ++i; | |
4086 | if (bottom >= yb) | |
4087 | break; | |
4088 | } | |
5f5c8ee5 GM |
4089 | |
4090 | last_new = i; | |
4091 | ||
4d8ade89 YM |
4092 | /* Set last_old to the index + 1 of the row that reaches the bottom |
4093 | boundary in the current matrix. We don't look at the enabled | |
4094 | flag here because we plan to reuse part of the display even if | |
4095 | other parts are disabled. */ | |
5f5c8ee5 | 4096 | i = first_old + 1; |
93962bfa GM |
4097 | while (i < current_matrix->nrows - 1) |
4098 | { | |
4099 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4100 | if (bottom <= yb) | |
4101 | ++i; | |
4102 | if (bottom >= yb) | |
4103 | break; | |
4104 | } | |
4105 | ||
5f5c8ee5 GM |
4106 | last_old = i; |
4107 | ||
4108 | /* Skip over rows equal at the bottom. */ | |
4109 | i = last_new; | |
4110 | j = last_old; | |
4111 | while (i - 1 > first_new | |
4112 | && j - 1 > first_old | |
1e5b2111 EZ |
4113 | && MATRIX_ROW (current_matrix, j - 1)->enabled_p |
4114 | && (MATRIX_ROW (current_matrix, j - 1)->y | |
4115 | == MATRIX_ROW (desired_matrix, i - 1)->y) | |
4116 | && !MATRIX_ROW (desired_matrix, i - 1)->redraw_fringe_bitmaps_p | |
6b1f9ba4 | 4117 | && row_equal_p (MATRIX_ROW (desired_matrix, i - 1), |
e4e0bee9 | 4118 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
4119 | --i, --j; |
4120 | last_new = i; | |
4121 | last_old = j; | |
4122 | ||
4123 | /* Nothing to do if all rows are equal. */ | |
4124 | if (last_new == first_new) | |
4125 | return 0; | |
4126 | ||
0065d054 | 4127 | /* Check for integer overflow in size calculation. |
ca9ce8f2 PE |
4128 | |
4129 | If next_almost_prime checks (N) for divisibility by 2..10, then | |
4130 | it can return at most N + 10, e.g., next_almost_prime (1) == 11. | |
4131 | So, set next_almost_prime_increment_max to 10. | |
4132 | ||
4133 | It's just a coincidence that next_almost_prime_increment_max == | |
4134 | NEXT_ALMOST_PRIME_LIMIT - 1. If NEXT_ALMOST_PRIME_LIMIT were | |
4135 | 13, then next_almost_prime_increment_max would be 14, e.g., | |
4136 | because next_almost_prime (113) would be 127. */ | |
4137 | { | |
4138 | verify (NEXT_ALMOST_PRIME_LIMIT == 11); | |
4139 | enum { next_almost_prime_increment_max = 10 }; | |
ca9ce8f2 | 4140 | ptrdiff_t row_table_max = |
0065d054 PE |
4141 | (min (PTRDIFF_MAX, SIZE_MAX) / (3 * sizeof *row_table) |
4142 | - next_almost_prime_increment_max); | |
4143 | ptrdiff_t current_nrows_max = row_table_max - desired_matrix->nrows; | |
4144 | if (current_nrows_max < current_matrix->nrows) | |
ca9ce8f2 PE |
4145 | memory_full (SIZE_MAX); |
4146 | } | |
4147 | ||
6df5d75f | 4148 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 4149 | |
6df5d75f | 4150 | if (current_matrix->nrows > old_lines_size) |
0065d054 PE |
4151 | old_lines = xpalloc (old_lines, &old_lines_size, |
4152 | current_matrix->nrows - old_lines_size, | |
4153 | INT_MAX, sizeof *old_lines); | |
177c0ea7 | 4154 | |
6df5d75f | 4155 | if (desired_matrix->nrows > new_lines_size) |
0065d054 PE |
4156 | new_lines = xpalloc (new_lines, &new_lines_size, |
4157 | desired_matrix->nrows - new_lines_size, | |
4158 | INT_MAX, sizeof *new_lines); | |
6df5d75f | 4159 | |
ca9ce8f2 PE |
4160 | n = desired_matrix->nrows; |
4161 | n += current_matrix->nrows; | |
0065d054 | 4162 | if (row_table_size < 3 * n) |
6df5d75f | 4163 | { |
ca9ce8f2 | 4164 | ptrdiff_t size = next_almost_prime (3 * n); |
0065d054 | 4165 | row_table = xnrealloc (row_table, size, sizeof *row_table); |
ca9ce8f2 | 4166 | row_table_size = size; |
0065d054 | 4167 | memset (row_table, 0, size * sizeof *row_table); |
6df5d75f GM |
4168 | } |
4169 | ||
4170 | if (n > row_entry_pool_size) | |
0065d054 PE |
4171 | row_entry_pool = xpalloc (row_entry_pool, &row_entry_pool_size, |
4172 | n - row_entry_pool_size, | |
4173 | -1, sizeof *row_entry_pool); | |
6df5d75f GM |
4174 | |
4175 | if (desired_matrix->nrows > runs_size) | |
4176 | { | |
0065d054 PE |
4177 | runs = xnrealloc (runs, desired_matrix->nrows, sizeof *runs); |
4178 | run_pool = xnrealloc (run_pool, desired_matrix->nrows, sizeof *run_pool); | |
ca9ce8f2 | 4179 | runs_size = desired_matrix->nrows; |
6df5d75f GM |
4180 | } |
4181 | ||
4182 | nruns = run_idx = 0; | |
4183 | row_entry_idx = 0; | |
4184 | ||
4185 | /* Add rows from the current and desired matrix to the hash table | |
4186 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 4187 | |
5f5c8ee5 GM |
4188 | for (i = first_old; i < last_old; ++i) |
4189 | { | |
4190 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
4191 | { | |
6b1f9ba4 | 4192 | entry = add_row_entry (MATRIX_ROW (current_matrix, i)); |
6df5d75f GM |
4193 | old_lines[i] = entry; |
4194 | ++entry->old_uses; | |
5f5c8ee5 GM |
4195 | } |
4196 | else | |
6df5d75f | 4197 | old_lines[i] = NULL; |
5f5c8ee5 GM |
4198 | } |
4199 | ||
5f5c8ee5 GM |
4200 | for (i = first_new; i < last_new; ++i) |
4201 | { | |
a54e2c05 | 4202 | eassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); |
6b1f9ba4 | 4203 | entry = add_row_entry (MATRIX_ROW (desired_matrix, i)); |
6df5d75f GM |
4204 | ++entry->new_uses; |
4205 | entry->new_line_number = i; | |
4206 | new_lines[i] = entry; | |
5f5c8ee5 | 4207 | } |
4588ec20 | 4208 | |
5f5c8ee5 GM |
4209 | /* Identify moves based on lines that are unique and equal |
4210 | in both matrices. */ | |
4211 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
4212 | if (old_lines[i] |
4213 | && old_lines[i]->old_uses == 1 | |
4214 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 | 4215 | { |
27786b2f | 4216 | int p, q; |
6df5d75f GM |
4217 | int new_line = old_lines[i]->new_line_number; |
4218 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
4219 | |
4220 | /* Record move. */ | |
4221 | run->current_vpos = i; | |
4222 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
4223 | run->desired_vpos = new_line; | |
4224 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
4225 | run->nrows = 1; | |
4226 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
4227 | ||
4228 | /* Extend backward. */ | |
27786b2f PE |
4229 | p = i - 1; |
4230 | q = new_line - 1; | |
4231 | while (p > first_old | |
4232 | && q > first_new | |
4233 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4234 | { |
27786b2f | 4235 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 JB |
4236 | --run->current_vpos; |
4237 | --run->desired_vpos; | |
5f5c8ee5 GM |
4238 | ++run->nrows; |
4239 | run->height += h; | |
4240 | run->desired_y -= h; | |
4241 | run->current_y -= h; | |
27786b2f | 4242 | --p, --q; |
5f5c8ee5 | 4243 | } |
4588ec20 | 4244 | |
5f5c8ee5 | 4245 | /* Extend forward. */ |
27786b2f PE |
4246 | p = i + 1; |
4247 | q = new_line + 1; | |
4248 | while (p < last_old | |
4249 | && q < last_new | |
4250 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4251 | { |
27786b2f | 4252 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 | 4253 | ++run->nrows; |
5f5c8ee5 | 4254 | run->height += h; |
27786b2f | 4255 | ++p, ++q; |
5f5c8ee5 | 4256 | } |
19dff8dc | 4257 | |
5f5c8ee5 GM |
4258 | /* Insert run into list of all runs. Order runs by copied |
4259 | pixel lines. Note that we record runs that don't have to | |
4260 | be copied because they are already in place. This is done | |
4261 | because we can avoid calling update_window_line in this | |
4262 | case. */ | |
27786b2f | 4263 | for (p = 0; p < nruns && runs[p]->height > run->height; ++p) |
5f5c8ee5 | 4264 | ; |
27786b2f PE |
4265 | for (q = nruns; q > p; --q) |
4266 | runs[q] = runs[q - 1]; | |
4267 | runs[p] = run; | |
5f5c8ee5 GM |
4268 | ++nruns; |
4269 | ||
4270 | i += run->nrows; | |
4271 | } | |
4272 | else | |
4273 | ++i; | |
4588ec20 | 4274 | |
5f5c8ee5 GM |
4275 | /* Do the moves. Do it in a way that we don't overwrite something |
4276 | we want to copy later on. This is not solvable in general | |
4277 | because there is only one display and we don't have a way to | |
4278 | exchange areas on this display. Example: | |
4588ec20 | 4279 | |
5f5c8ee5 GM |
4280 | +-----------+ +-----------+ |
4281 | | A | | B | | |
4282 | +-----------+ --> +-----------+ | |
4283 | | B | | A | | |
4284 | +-----------+ +-----------+ | |
4588ec20 | 4285 | |
5f5c8ee5 GM |
4286 | Instead, prefer bigger moves, and invalidate moves that would |
4287 | copy from where we copied to. */ | |
ea0d86af | 4288 | |
5f5c8ee5 GM |
4289 | for (i = 0; i < nruns; ++i) |
4290 | if (runs[i]->nrows > 0) | |
4291 | { | |
4292 | struct run *r = runs[i]; | |
24e86043 | 4293 | |
5f5c8ee5 GM |
4294 | /* Copy on the display. */ |
4295 | if (r->current_y != r->desired_y) | |
4296 | { | |
989b42d2 | 4297 | rif->clear_window_mouse_face (w); |
5f5c8ee5 | 4298 | rif->scroll_run_hook (w, r); |
1305621b | 4299 | } |
5f5c8ee5 | 4300 | |
1305621b YM |
4301 | /* Truncate runs that copy to where we copied to, and |
4302 | invalidate runs that copy from where we copied to. */ | |
4303 | for (j = nruns - 1; j > i; --j) | |
4304 | { | |
4305 | struct run *p = runs[j]; | |
59ea14cd | 4306 | bool truncated_p = 0; |
5f5c8ee5 | 4307 | |
1305621b YM |
4308 | if (p->nrows > 0 |
4309 | && p->desired_y < r->desired_y + r->height | |
4310 | && p->desired_y + p->height > r->desired_y) | |
5f5c8ee5 | 4311 | { |
1305621b YM |
4312 | if (p->desired_y < r->desired_y) |
4313 | { | |
4314 | p->nrows = r->desired_vpos - p->desired_vpos; | |
4315 | p->height = r->desired_y - p->desired_y; | |
4316 | truncated_p = 1; | |
4317 | } | |
4318 | else | |
4319 | { | |
4320 | int nrows_copied = (r->desired_vpos + r->nrows | |
4321 | - p->desired_vpos); | |
4322 | ||
4323 | if (p->nrows <= nrows_copied) | |
4324 | p->nrows = 0; | |
4325 | else | |
4326 | { | |
4327 | int height_copied = (r->desired_y + r->height | |
4328 | - p->desired_y); | |
4329 | ||
4330 | p->current_vpos += nrows_copied; | |
4331 | p->desired_vpos += nrows_copied; | |
4332 | p->nrows -= nrows_copied; | |
4333 | p->current_y += height_copied; | |
4334 | p->desired_y += height_copied; | |
4335 | p->height -= height_copied; | |
4336 | truncated_p = 1; | |
4337 | } | |
4338 | } | |
4339 | } | |
177c0ea7 | 4340 | |
1305621b YM |
4341 | if (r->current_y != r->desired_y |
4342 | /* The condition below is equivalent to | |
4343 | ((p->current_y >= r->desired_y | |
5f5c8ee5 | 4344 | && p->current_y < r->desired_y + r->height) |
1305621b | 4345 | || (p->current_y + p->height > r->desired_y |
5f5c8ee5 | 4346 | && (p->current_y + p->height |
1305621b YM |
4347 | <= r->desired_y + r->height))) |
4348 | because we have 0 < p->height <= r->height. */ | |
4349 | && p->current_y < r->desired_y + r->height | |
4350 | && p->current_y + p->height > r->desired_y) | |
4351 | p->nrows = 0; | |
4352 | ||
4353 | /* Reorder runs by copied pixel lines if truncated. */ | |
4354 | if (truncated_p && p->nrows > 0) | |
4355 | { | |
4356 | int k = nruns - 1; | |
4357 | ||
4358 | while (runs[k]->nrows == 0 || runs[k]->height < p->height) | |
4359 | k--; | |
4360 | memmove (runs + j, runs + j + 1, (k - j) * sizeof (*runs)); | |
4361 | runs[k] = p; | |
5f5c8ee5 GM |
4362 | } |
4363 | } | |
ea0d86af | 4364 | |
5f5c8ee5 GM |
4365 | /* Assign matrix rows. */ |
4366 | for (j = 0; j < r->nrows; ++j) | |
4367 | { | |
4368 | struct glyph_row *from, *to; | |
59ea14cd | 4369 | bool to_overlapped_p; |
e876ff42 | 4370 | |
5f5c8ee5 GM |
4371 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
4372 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 4373 | to_overlapped_p = to->overlapped_p; |
e61124cd | 4374 | from->redraw_fringe_bitmaps_p = from->fringe_bitmap_periodic_p; |
5f5c8ee5 | 4375 | assign_row (to, from); |
1305621b YM |
4376 | /* The above `assign_row' actually does swap, so if we had |
4377 | an overlap in the copy destination of two runs, then | |
4378 | the second run would assign a previously disabled bogus | |
4379 | row. But thanks to the truncation code in the | |
4380 | preceding for-loop, we no longer have such an overlap, | |
4381 | and thus the assigned row should always be enabled. */ | |
a54e2c05 | 4382 | eassert (to->enabled_p); |
1305621b | 4383 | from->enabled_p = 0; |
408f5064 | 4384 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
4385 | } |
4386 | } | |
15874c59 | 4387 | |
6df5d75f GM |
4388 | /* Clear the hash table, for the next time. */ |
4389 | for (i = 0; i < row_entry_idx; ++i) | |
4390 | row_table[row_entry_pool[i].bucket] = NULL; | |
4391 | ||
aec1708a | 4392 | /* Value is 1 to indicate that we scrolled the display. */ |
908589fd | 4393 | return nruns > 0; |
5f5c8ee5 | 4394 | } |
de83c314 | 4395 | |
15874c59 | 4396 | |
4588ec20 | 4397 | \f |
5f5c8ee5 GM |
4398 | /************************************************************************ |
4399 | Frame-Based Updates | |
4400 | ************************************************************************/ | |
4588ec20 | 4401 | |
5f5c8ee5 | 4402 | /* Update the desired frame matrix of frame F. |
4588ec20 | 4403 | |
59ea14cd PE |
4404 | FORCE_P means that the update should not be stopped by pending input. |
4405 | INHIBIT_HAIRY_ID_P means that scrolling should not be tried. | |
5f5c8ee5 | 4406 | |
59ea14cd | 4407 | Value is true if update was stopped due to pending input. */ |
5f5c8ee5 | 4408 | |
59ea14cd PE |
4409 | static bool |
4410 | update_frame_1 (struct frame *f, bool force_p, bool inhibit_id_p) | |
4588ec20 | 4411 | { |
5f5c8ee5 GM |
4412 | /* Frame matrices to work on. */ |
4413 | struct glyph_matrix *current_matrix = f->current_matrix; | |
4414 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
4415 | int i; | |
59ea14cd | 4416 | bool pause_p; |
4588ec20 | 4417 | int preempt_count = baud_rate / 2400 + 1; |
5f5c8ee5 | 4418 | |
a54e2c05 | 4419 | eassert (current_matrix && desired_matrix); |
4588ec20 | 4420 | |
c37e4889 RS |
4421 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
4422 | calculate_costs (f); | |
4423 | ||
d88c2b9e RS |
4424 | if (preempt_count <= 0) |
4425 | preempt_count = 1; | |
4426 | ||
a2130dbb | 4427 | if (!force_p && detect_input_pending_ignore_squeezables ()) |
4588ec20 | 4428 | { |
27786b2f | 4429 | pause_p = 1; |
4588ec20 JB |
4430 | goto do_pause; |
4431 | } | |
4432 | ||
5f5c8ee5 | 4433 | /* If we cannot insert/delete lines, it's no use trying it. */ |
daf01701 | 4434 | if (!FRAME_LINE_INS_DEL_OK (f)) |
5f5c8ee5 | 4435 | inhibit_id_p = 1; |
7098a0fa | 4436 | |
efb859b4 | 4437 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
4438 | i/d line if just want cursor motion. */ |
4439 | for (i = 0; i < desired_matrix->nrows; i++) | |
4440 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
4441 | break; |
4442 | ||
4443 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
4444 | if (!inhibit_id_p && i < desired_matrix->nrows) |
4445 | force_p |= scrolling (f); | |
4588ec20 JB |
4446 | |
4447 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
4448 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
4449 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 4450 | |
5f5c8ee5 GM |
4451 | /* Now update the rest of the lines. */ |
4452 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 4453 | { |
5f5c8ee5 | 4454 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 4455 | { |
b6a65ac2 | 4456 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
4457 | { |
4458 | /* Flush out every so many lines. | |
4459 | Also flush out if likely to have more than 1k buffered | |
4460 | otherwise. I'm told that some telnet connections get | |
4461 | really screwed by more than 1k output at once. */ | |
fced92f1 CY |
4462 | FILE *display_output = FRAME_TTY (f)->output; |
4463 | if (display_output) | |
4588ec20 | 4464 | { |
8148369c | 4465 | ptrdiff_t outq = __fpending (display_output); |
fced92f1 CY |
4466 | if (outq > 900 |
4467 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
06b63c9b | 4468 | fflush (display_output); |
4588ec20 | 4469 | } |
4588ec20 JB |
4470 | } |
4471 | ||
d012c62b | 4472 | if (!force_p && (i - 1) % preempt_count == 0) |
a2d5fca0 | 4473 | detect_input_pending_ignore_squeezables (); |
a2960116 | 4474 | |
5f5c8ee5 | 4475 | update_frame_line (f, i); |
4588ec20 | 4476 | } |
4588ec20 | 4477 | } |
177c0ea7 | 4478 | |
59ea14cd | 4479 | pause_p = 0 < i && i < FRAME_LINES (f) - 1; |
4588ec20 JB |
4480 | |
4481 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
27786b2f | 4482 | if (!pause_p) |
4588ec20 | 4483 | { |
48cf7030 | 4484 | if ((cursor_in_echo_area |
5f5c8ee5 | 4485 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 4486 | show the cursor for the message instead of for the |
5f5c8ee5 | 4487 | (now hidden) mini-buffer contents. */ |
2577053b RS |
4488 | || (EQ (minibuf_window, selected_window) |
4489 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 4490 | && !NILP (echo_area_buffer[0]))) |
2577053b | 4491 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 4492 | the active mini-buffer window. */ |
2577053b | 4493 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 4494 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 4495 | { |
7df02016 | 4496 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
4497 | int row, col; |
4498 | ||
4499 | if (cursor_in_echo_area < 0) | |
4500 | { | |
5f5c8ee5 GM |
4501 | /* Negative value of cursor_in_echo_area means put |
4502 | cursor at beginning of line. */ | |
648fa17d JB |
4503 | row = top; |
4504 | col = 0; | |
4505 | } | |
1113d9db | 4506 | else |
648fa17d | 4507 | { |
5f5c8ee5 GM |
4508 | /* Positive value of cursor_in_echo_area means put |
4509 | cursor at the end of the prompt. If the mini-buffer | |
4510 | is several lines high, find the last line that has | |
4511 | any text on it. */ | |
7df02016 | 4512 | row = FRAME_LINES (f); |
177c0ea7 | 4513 | do |
648fa17d | 4514 | { |
5f5c8ee5 GM |
4515 | --row; |
4516 | col = 0; | |
177c0ea7 | 4517 | |
5f5c8ee5 GM |
4518 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
4519 | { | |
4520 | /* Frame rows are filled up with spaces that | |
4521 | must be ignored here. */ | |
5f5c8ee5 GM |
4522 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
4523 | row); | |
4524 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
4525 | struct glyph *last = start + r->used[TEXT_AREA]; | |
4526 | ||
4527 | while (last > start | |
4528 | && (last - 1)->charpos < 0) | |
4529 | --last; | |
177c0ea7 | 4530 | |
5f5c8ee5 GM |
4531 | col = last - start; |
4532 | } | |
648fa17d JB |
4533 | } |
4534 | while (row > top && col == 0); | |
4535 | ||
6395da5c | 4536 | /* Make sure COL is not out of range. */ |
868e640e | 4537 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 4538 | { |
6395da5c | 4539 | /* If we have another row, advance cursor into it. */ |
7df02016 | 4540 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 4541 | { |
7df02016 | 4542 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
4543 | row++; |
4544 | } | |
4545 | /* Otherwise move it back in range. */ | |
4546 | else | |
868e640e | 4547 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
4548 | } |
4549 | } | |
4550 | ||
385ed61f | 4551 | cursor_to (f, row, col); |
1113d9db | 4552 | } |
4588ec20 | 4553 | else |
5f5c8ee5 GM |
4554 | { |
4555 | /* We have only one cursor on terminal frames. Use it to | |
4556 | display the cursor of the selected window. */ | |
4557 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
4558 | if (w->cursor.vpos >= 0 |
4559 | /* The cursor vpos may be temporarily out of bounds | |
4560 | in the following situation: There is one window, | |
4561 | with the cursor in the lower half of it. The window | |
4562 | is split, and a message causes a redisplay before | |
4563 | a new cursor position has been computed. */ | |
7df02016 | 4564 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
4565 | { |
4566 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
4567 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
4568 | ||
eeaf9bf3 | 4569 | x += max (0, w->left_margin_cols); |
385ed61f | 4570 | cursor_to (f, y, x); |
5f5c8ee5 GM |
4571 | } |
4572 | } | |
4588ec20 JB |
4573 | } |
4574 | ||
4588ec20 JB |
4575 | do_pause: |
4576 | ||
5f5c8ee5 | 4577 | clear_desired_matrices (f); |
27786b2f | 4578 | return pause_p; |
4588ec20 JB |
4579 | } |
4580 | ||
4588ec20 | 4581 | |
5f5c8ee5 | 4582 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 4583 | |
59ea14cd | 4584 | static bool |
971de7fb | 4585 | scrolling (struct frame *frame) |
4588ec20 JB |
4586 | { |
4587 | int unchanged_at_top, unchanged_at_bottom; | |
4588 | int window_size; | |
4589 | int changed_lines; | |
38182d90 PE |
4590 | int *old_hash = alloca (FRAME_LINES (frame) * sizeof (int)); |
4591 | int *new_hash = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4592 | int *draw_cost = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4593 | int *old_draw_cost = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 4594 | register int i; |
7df02016 | 4595 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
4596 | struct glyph_matrix *current_matrix = frame->current_matrix; |
4597 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 4598 | |
5f5c8ee5 | 4599 | if (!current_matrix) |
1088b922 | 4600 | emacs_abort (); |
4588ec20 | 4601 | |
5f5c8ee5 GM |
4602 | /* Compute hash codes of all the lines. Also calculate number of |
4603 | changed lines, number of unchanged lines at the beginning, and | |
4604 | number of unchanged lines at the end. */ | |
4588ec20 JB |
4605 | changed_lines = 0; |
4606 | unchanged_at_top = 0; | |
7df02016 KS |
4607 | unchanged_at_bottom = FRAME_LINES (frame); |
4608 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
4609 | { |
4610 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 4611 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 4612 | return 0; |
5f5c8ee5 GM |
4613 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
4614 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
4615 | { |
4616 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
4617 | new_hash[i] = old_hash[i]; | |
4618 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
4619 | draw_cost[i] = INFINITY; | |
4620 | } | |
4588ec20 | 4621 | else |
f188b3c4 | 4622 | { |
5f5c8ee5 GM |
4623 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
4624 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 4625 | } |
4588ec20 JB |
4626 | |
4627 | if (old_hash[i] != new_hash[i]) | |
4628 | { | |
4629 | changed_lines++; | |
7df02016 | 4630 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
4631 | } |
4632 | else if (i == unchanged_at_top) | |
4633 | unchanged_at_top++; | |
5f5c8ee5 | 4634 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
4635 | } |
4636 | ||
4637 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
daf01701 | 4638 | if ((!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4639 | && changed_lines < baud_rate / 2400) |
7df02016 | 4640 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
4641 | return 1; |
4642 | ||
7df02016 | 4643 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
4644 | - unchanged_at_bottom); |
4645 | ||
daf01701 | 4646 | if (FRAME_SCROLL_REGION_OK (frame)) |
4588ec20 | 4647 | free_at_end_vpos -= unchanged_at_bottom; |
daf01701 | 4648 | else if (FRAME_MEMORY_BELOW_FRAME (frame)) |
4588ec20 JB |
4649 | free_at_end_vpos = -1; |
4650 | ||
4651 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 4652 | current frame and desired frame, don't bother with i/d calc. */ |
daf01701 | 4653 | if (!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4654 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
4655 | && (window_size >= |
4656 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 4657 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
4658 | old_hash, new_hash, draw_cost))) |
4659 | return 0; | |
4660 | ||
5f5c8ee5 GM |
4661 | if (window_size < 2) |
4662 | return 0; | |
4663 | ||
502b9b64 | 4664 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 4665 | draw_cost + unchanged_at_top - 1, |
190bb91a | 4666 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
4667 | old_hash + unchanged_at_top - 1, |
4668 | new_hash + unchanged_at_top - 1, | |
4669 | free_at_end_vpos - unchanged_at_top); | |
4670 | ||
4671 | return 0; | |
4672 | } | |
4588ec20 | 4673 | |
4588ec20 | 4674 | |
5f5c8ee5 GM |
4675 | /* Count the number of blanks at the start of the vector of glyphs R |
4676 | which is LEN glyphs long. */ | |
4588ec20 | 4677 | |
4588ec20 | 4678 | static int |
971de7fb | 4679 | count_blanks (struct glyph *r, int len) |
4588ec20 | 4680 | { |
5f5c8ee5 | 4681 | int i; |
177c0ea7 | 4682 | |
5f5c8ee5 GM |
4683 | for (i = 0; i < len; ++i) |
4684 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
4685 | break; | |
4686 | ||
4687 | return i; | |
4588ec20 JB |
4688 | } |
4689 | ||
5f5c8ee5 GM |
4690 | |
4691 | /* Count the number of glyphs in common at the start of the glyph | |
4692 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
4693 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
4694 | ||
4588ec20 | 4695 | static int |
971de7fb | 4696 | count_match (struct glyph *str1, struct glyph *end1, struct glyph *str2, struct glyph *end2) |
4588ec20 | 4697 | { |
5f5c8ee5 GM |
4698 | struct glyph *p1 = str1; |
4699 | struct glyph *p2 = str2; | |
177c0ea7 | 4700 | |
5f5c8ee5 GM |
4701 | while (p1 < end1 |
4702 | && p2 < end2 | |
42186983 | 4703 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 4704 | ++p1, ++p2; |
177c0ea7 | 4705 | |
5f5c8ee5 | 4706 | return p1 - str1; |
4588ec20 JB |
4707 | } |
4708 | ||
5f5c8ee5 | 4709 | |
4588ec20 | 4710 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 4711 | |
5e617bc2 | 4712 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS ((f))]) |
4588ec20 | 4713 | |
5f5c8ee5 GM |
4714 | |
4715 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
4716 | ||
4588ec20 | 4717 | static void |
971de7fb | 4718 | update_frame_line (struct frame *f, int vpos) |
4588ec20 | 4719 | { |
5f5c8ee5 | 4720 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
4721 | int tem; |
4722 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
4723 | struct glyph_matrix *current_matrix = f->current_matrix; |
4724 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
4725 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
4726 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
59ea14cd PE |
4727 | bool must_write_whole_line_p; |
4728 | bool write_spaces_p = FRAME_MUST_WRITE_SPACES (f); | |
4729 | bool colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background | |
4730 | != FACE_TTY_DEFAULT_BG_COLOR); | |
0a894bad GM |
4731 | |
4732 | if (colored_spaces_p) | |
4733 | write_spaces_p = 1; | |
5f5c8ee5 | 4734 | |
26c63686 GM |
4735 | /* Current row not enabled means it has unknown contents. We must |
4736 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
4737 | must_write_whole_line_p = !current_row->enabled_p; |
4738 | if (must_write_whole_line_p) | |
4588ec20 | 4739 | { |
5f5c8ee5 | 4740 | obody = 0; |
4588ec20 JB |
4741 | olen = 0; |
4742 | } | |
4743 | else | |
4744 | { | |
5f5c8ee5 GM |
4745 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
4746 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 4747 | |
4cecaab8 MB |
4748 | /* Ignore trailing spaces, if we can. */ |
4749 | if (!write_spaces_p) | |
4750 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
4751 | olen--; | |
4588ec20 JB |
4752 | } |
4753 | ||
5f5c8ee5 GM |
4754 | current_row->enabled_p = 1; |
4755 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 4756 | |
5f5c8ee5 GM |
4757 | /* If desired line is empty, just clear the line. */ |
4758 | if (!desired_row->enabled_p) | |
4588ec20 JB |
4759 | { |
4760 | nlen = 0; | |
4761 | goto just_erase; | |
4762 | } | |
4763 | ||
5f5c8ee5 GM |
4764 | nbody = desired_row->glyphs[TEXT_AREA]; |
4765 | nlen = desired_row->used[TEXT_AREA]; | |
4766 | nend = nbody + nlen; | |
4767 | ||
4768 | /* If display line has unknown contents, write the whole line. */ | |
4769 | if (must_write_whole_line_p) | |
4770 | { | |
26c63686 | 4771 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 4772 | if (!write_spaces_p) |
74ca462f GM |
4773 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
4774 | --nlen; | |
4775 | ||
26c63686 | 4776 | /* Write the contents of the desired line. */ |
74ca462f | 4777 | if (nlen) |
26c63686 | 4778 | { |
385ed61f KL |
4779 | cursor_to (f, vpos, 0); |
4780 | write_glyphs (f, nbody, nlen); | |
26c63686 | 4781 | } |
177c0ea7 | 4782 | |
26c63686 GM |
4783 | /* Don't call clear_end_of_line if we already wrote the whole |
4784 | line. The cursor will not be at the right margin in that | |
4785 | case but in the line below. */ | |
7df02016 | 4786 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 | 4787 | { |
385ed61f KL |
4788 | cursor_to (f, vpos, nlen); |
4789 | clear_end_of_line (f, FRAME_TOTAL_COLS (f)); | |
26c63686 | 4790 | } |
58827478 GM |
4791 | else |
4792 | /* Make sure we are in the right row, otherwise cursor movement | |
4793 | with cmgoto might use `ch' in the wrong row. */ | |
385ed61f | 4794 | cursor_to (f, vpos, 0); |
177c0ea7 | 4795 | |
5f5c8ee5 GM |
4796 | make_current (desired_matrix, current_matrix, vpos); |
4797 | return; | |
4798 | } | |
4588ec20 JB |
4799 | |
4800 | /* Pretend trailing spaces are not there at all, | |
4801 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
4802 | if (!write_spaces_p) |
4803 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
4804 | nlen--; | |
4588ec20 JB |
4805 | |
4806 | /* If there's no i/d char, quickly do the best we can without it. */ | |
daf01701 | 4807 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
4588ec20 | 4808 | { |
5f5c8ee5 | 4809 | int i, j; |
4588ec20 | 4810 | |
5f5c8ee5 GM |
4811 | /* Find the first glyph in desired row that doesn't agree with |
4812 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
4813 | for (i = 0; i < nlen; i++) |
4814 | { | |
5f5c8ee5 | 4815 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 4816 | { |
5f5c8ee5 GM |
4817 | /* Find the end of the run of different glyphs. */ |
4818 | j = i + 1; | |
4819 | while (j < nlen | |
4820 | && (j >= olen | |
4821 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
4822 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
4823 | ++j; | |
177c0ea7 JB |
4824 | |
4825 | /* Output this run of non-matching chars. */ | |
385ed61f KL |
4826 | cursor_to (f, vpos, i); |
4827 | write_glyphs (f, nbody + i, j - i); | |
5f5c8ee5 | 4828 | i = j - 1; |
4588ec20 JB |
4829 | |
4830 | /* Now find the next non-match. */ | |
4831 | } | |
4832 | } | |
4833 | ||
4834 | /* Clear the rest of the line, or the non-clear part of it. */ | |
4835 | if (olen > nlen) | |
4836 | { | |
385ed61f KL |
4837 | cursor_to (f, vpos, nlen); |
4838 | clear_end_of_line (f, olen); | |
4588ec20 JB |
4839 | } |
4840 | ||
5f5c8ee5 GM |
4841 | /* Make current row = desired row. */ |
4842 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
4843 | return; |
4844 | } | |
4845 | ||
5f5c8ee5 GM |
4846 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
4847 | characters in a row. */ | |
4848 | ||
4588ec20 JB |
4849 | if (!olen) |
4850 | { | |
5f5c8ee5 GM |
4851 | /* If current line is blank, skip over initial spaces, if |
4852 | possible, and write the rest. */ | |
4cecaab8 | 4853 | if (write_spaces_p) |
5f5c8ee5 GM |
4854 | nsp = 0; |
4855 | else | |
4856 | nsp = count_blanks (nbody, nlen); | |
4857 | ||
4588ec20 JB |
4858 | if (nlen > nsp) |
4859 | { | |
385ed61f KL |
4860 | cursor_to (f, vpos, nsp); |
4861 | write_glyphs (f, nbody + nsp, nlen - nsp); | |
4588ec20 JB |
4862 | } |
4863 | ||
502b9b64 | 4864 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 4865 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
4866 | return; |
4867 | } | |
4868 | ||
4588ec20 | 4869 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 4870 | osp = count_blanks (obody, olen); |
4cecaab8 | 4871 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 4872 | |
5f5c8ee5 GM |
4873 | /* Compute number of matching chars starting with first non-blank. */ |
4874 | begmatch = count_match (obody + osp, obody + olen, | |
4875 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
4876 | |
4877 | /* Spaces in new match implicit space past the end of old. */ | |
4878 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 4879 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
4880 | { |
4881 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
4882 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
4883 | ++begmatch; | |
4588ec20 JB |
4884 | } |
4885 | ||
4886 | /* Avoid doing insert/delete char | |
4887 | just cause number of leading spaces differs | |
5f5c8ee5 | 4888 | when the following text does not match. */ |
4588ec20 JB |
4889 | if (begmatch == 0 && osp != nsp) |
4890 | osp = nsp = min (osp, nsp); | |
4891 | ||
4892 | /* Find matching characters at end of line */ | |
4893 | op1 = obody + olen; | |
4894 | np1 = nbody + nlen; | |
4895 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
4896 | while (op1 > op2 |
4897 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
4898 | { |
4899 | op1--; | |
4900 | np1--; | |
4901 | } | |
4902 | endmatch = obody + olen - op1; | |
4903 | ||
4588ec20 JB |
4904 | /* tem gets the distance to insert or delete. |
4905 | endmatch is how many characters we save by doing so. | |
4906 | Is it worth it? */ | |
4907 | ||
4908 | tem = (nlen - nsp) - (olen - osp); | |
4909 | if (endmatch && tem | |
daf01701 | 4910 | && (!FRAME_CHAR_INS_DEL_OK (f) |
8a56675d | 4911 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
4912 | endmatch = 0; |
4913 | ||
4914 | /* nsp - osp is the distance to insert or delete. | |
4915 | If that is nonzero, begmatch is known to be nonzero also. | |
4916 | begmatch + endmatch is how much we save by doing the ins/del. | |
4917 | Is it worth it? */ | |
4918 | ||
4919 | if (nsp != osp | |
daf01701 | 4920 | && (!FRAME_CHAR_INS_DEL_OK (f) |
c363a1d6 | 4921 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
4922 | { |
4923 | begmatch = 0; | |
4924 | endmatch = 0; | |
4925 | osp = nsp = min (osp, nsp); | |
4926 | } | |
4927 | ||
4928 | /* Now go through the line, inserting, writing and | |
4929 | deleting as appropriate. */ | |
4930 | ||
4931 | if (osp > nsp) | |
4932 | { | |
385ed61f KL |
4933 | cursor_to (f, vpos, nsp); |
4934 | delete_glyphs (f, osp - nsp); | |
4588ec20 JB |
4935 | } |
4936 | else if (nsp > osp) | |
4937 | { | |
4938 | /* If going to delete chars later in line | |
4939 | and insert earlier in the line, | |
4940 | must delete first to avoid losing data in the insert */ | |
4941 | if (endmatch && nlen < olen + nsp - osp) | |
4942 | { | |
385ed61f KL |
4943 | cursor_to (f, vpos, nlen - endmatch + osp - nsp); |
4944 | delete_glyphs (f, olen + nsp - osp - nlen); | |
4588ec20 JB |
4945 | olen = nlen - (nsp - osp); |
4946 | } | |
385ed61f KL |
4947 | cursor_to (f, vpos, osp); |
4948 | insert_glyphs (f, 0, nsp - osp); | |
4588ec20 JB |
4949 | } |
4950 | olen += nsp - osp; | |
4951 | ||
4952 | tem = nsp + begmatch + endmatch; | |
4953 | if (nlen != tem || olen != tem) | |
4954 | { | |
4588ec20 JB |
4955 | if (!endmatch || nlen == olen) |
4956 | { | |
c363a1d6 GM |
4957 | /* If new text being written reaches right margin, there is |
4958 | no need to do clear-to-eol at the end of this function | |
4959 | (and it would not be safe, since cursor is not going to | |
4960 | be "at the margin" after the text is done). */ | |
7df02016 | 4961 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 4962 | olen = 0; |
c363a1d6 GM |
4963 | |
4964 | /* Function write_glyphs is prepared to do nothing | |
4965 | if passed a length <= 0. Check it here to avoid | |
4966 | unnecessary cursor movement. */ | |
4967 | if (nlen - tem > 0) | |
4968 | { | |
385ed61f KL |
4969 | cursor_to (f, vpos, nsp + begmatch); |
4970 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
c363a1d6 | 4971 | } |
4588ec20 JB |
4972 | } |
4973 | else if (nlen > olen) | |
4974 | { | |
24e86043 KH |
4975 | /* Here, we used to have the following simple code: |
4976 | ---------------------------------------- | |
4977 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
4978 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
4979 | ---------------------------------------- | |
4980 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
4981 | is a padding glyph. */ | |
4982 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
4983 | int del; | |
5f5c8ee5 | 4984 | |
385ed61f | 4985 | cursor_to (f, vpos, nsp + begmatch); |
177c0ea7 | 4986 | |
5f5c8ee5 | 4987 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
4988 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
4989 | out--; | |
385ed61f | 4990 | write_glyphs (f, nbody + nsp + begmatch, out); |
177c0ea7 | 4991 | |
5f5c8ee5 GM |
4992 | /* If we left columns to be overwritten, we must delete them. */ |
4993 | del = olen - tem - out; | |
c363a1d6 | 4994 | if (del > 0) |
385ed61f | 4995 | delete_glyphs (f, del); |
177c0ea7 | 4996 | |
5f5c8ee5 | 4997 | /* At last, we insert columns not yet written out. */ |
385ed61f | 4998 | insert_glyphs (f, nbody + nsp + begmatch + out, nlen - olen + del); |
5f5c8ee5 GM |
4999 | olen = nlen; |
5000 | } | |
5001 | else if (olen > nlen) | |
5002 | { | |
385ed61f KL |
5003 | cursor_to (f, vpos, nsp + begmatch); |
5004 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
5005 | delete_glyphs (f, olen - nlen); | |
5f5c8ee5 GM |
5006 | olen = nlen; |
5007 | } | |
bd9e3e75 | 5008 | } |
5f5c8ee5 GM |
5009 | |
5010 | just_erase: | |
5011 | /* If any unerased characters remain after the new line, erase them. */ | |
5012 | if (olen > nlen) | |
078b3696 | 5013 | { |
385ed61f KL |
5014 | cursor_to (f, vpos, nlen); |
5015 | clear_end_of_line (f, olen); | |
078b3696 | 5016 | } |
5f5c8ee5 GM |
5017 | |
5018 | /* Exchange contents between current_frame and new_frame. */ | |
5019 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5020 | } |
5f5c8ee5 GM |
5021 | |
5022 | ||
078b3696 | 5023 | \f |
5f5c8ee5 GM |
5024 | /*********************************************************************** |
5025 | X/Y Position -> Buffer Position | |
5026 | ***********************************************************************/ | |
5027 | ||
a1b0a6db | 5028 | /* Determine what's under window-relative pixel position (*X, *Y). |
2396cbba | 5029 | Return the OBJECT (string or buffer) that's there. |
6b61353c | 5030 | Return in *POS the position in that object. |
2396cbba EZ |
5031 | Adjust *X and *Y to character positions. |
5032 | Return in *DX and *DY the pixel coordinates of the click, | |
5033 | relative to the top left corner of OBJECT, or relative to | |
5034 | the top left corner of the character glyph at (*X, *Y) | |
5035 | if OBJECT is nil. | |
5036 | Return WIDTH and HEIGHT of the object at (*X, *Y), or zero | |
5037 | if the coordinates point to an empty area of the display. */ | |
5f5c8ee5 | 5038 | |
6b61353c | 5039 | Lisp_Object |
971de7fb | 5040 | 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 | 5041 | { |
5f5c8ee5 | 5042 | struct it it; |
707ea971 | 5043 | Lisp_Object old_current_buffer = Fcurrent_buffer (); |
5f5c8ee5 | 5044 | struct text_pos startp; |
6b61353c KH |
5045 | Lisp_Object string; |
5046 | struct glyph_row *row; | |
cedd7cd9 KS |
5047 | #ifdef HAVE_WINDOW_SYSTEM |
5048 | struct image *img = 0; | |
5049 | #endif | |
2396cbba | 5050 | int x0, x1, to_x; |
57b3e30b | 5051 | void *itdata = NULL; |
5f5c8ee5 | 5052 | |
707ea971 CY |
5053 | /* We used to set current_buffer directly here, but that does the |
5054 | wrong thing with `face-remapping-alist' (bug#2044). */ | |
e74aeda8 | 5055 | Fset_buffer (w->contents); |
57b3e30b | 5056 | itdata = bidi_shelve_cache (); |
cf91889a | 5057 | CLIP_TEXT_POS_FROM_MARKER (startp, w->start); |
5f5c8ee5 | 5058 | start_display (&it, w, startp); |
352ec8ff EZ |
5059 | /* start_display takes into account the header-line row, but IT's |
5060 | vpos still counts from the glyph row that includes the window's | |
5061 | start position. Adjust for a possible header-line row. */ | |
59ea14cd | 5062 | it.vpos += WINDOW_WANTS_HEADER_LINE_P (w); |
177c0ea7 | 5063 | |
9173a8fb | 5064 | x0 = *x; |
2396cbba EZ |
5065 | |
5066 | /* First, move to the beginning of the row corresponding to *Y. We | |
5067 | need to be in that row to get the correct value of base paragraph | |
40629f17 | 5068 | direction for the text at (*X, *Y). */ |
2396cbba EZ |
5069 | move_it_to (&it, -1, 0, *y, -1, MOVE_TO_X | MOVE_TO_Y); |
5070 | ||
5071 | /* TO_X is the pixel position that the iterator will compute for the | |
40629f17 EZ |
5072 | glyph at *X. We add it.first_visible_x because iterator |
5073 | positions include the hscroll. */ | |
2396cbba EZ |
5074 | to_x = x0 + it.first_visible_x; |
5075 | if (it.bidi_it.paragraph_dir == R2L) | |
5076 | /* For lines in an R2L paragraph, we need to mirror TO_X wrt the | |
5077 | text area. This is because the iterator, even in R2L | |
5078 | paragraphs, delivers glyphs as if they started at the left | |
5079 | margin of the window. (When we actually produce glyphs for | |
5080 | display, we reverse their order in PRODUCE_GLYPHS, but the | |
5081 | iterator doesn't know about that.) The following line adjusts | |
5082 | the pixel position to the iterator geometry, which is what | |
40629f17 EZ |
5083 | move_it_* routines use. (The -1 is because in a window whose |
5084 | text-area width is W, the rightmost pixel position is W-1, and | |
5085 | it should be mirrored into zero pixel position.) */ | |
5086 | to_x = window_box_width (w, TEXT_AREA) - to_x - 1; | |
5087 | ||
5088 | /* Now move horizontally in the row to the glyph under *X. Second | |
5089 | argument is ZV to prevent move_it_in_display_line from matching | |
5090 | based on buffer positions. */ | |
2396cbba | 5091 | move_it_in_display_line (&it, ZV, to_x, MOVE_TO_X); |
35928349 | 5092 | bidi_unshelve_cache (itdata, 0); |
177c0ea7 | 5093 | |
707ea971 | 5094 | Fset_buffer (old_current_buffer); |
a1b0a6db | 5095 | |
6b61353c KH |
5096 | *dx = x0 + it.first_visible_x - it.current_x; |
5097 | *dy = *y - it.current_y; | |
5098 | ||
e74aeda8 | 5099 | string = w->contents; |
6b61353c KH |
5100 | if (STRINGP (it.string)) |
5101 | string = it.string; | |
a1b0a6db | 5102 | *pos = it.current; |
86282aab KH |
5103 | if (it.what == IT_COMPOSITION |
5104 | && it.cmp_it.nchars > 1 | |
5105 | && it.cmp_it.reversed_p) | |
5106 | { | |
5107 | /* The current display element is a grapheme cluster in a | |
5108 | composition. In that case, we need the position of the first | |
5109 | character of the cluster. But, as it.cmp_it.reversed_p is 1, | |
5110 | it.current points to the last character of the cluster, thus | |
5111 | we must move back to the first character of the same | |
5112 | cluster. */ | |
5113 | CHARPOS (pos->pos) -= it.cmp_it.nchars - 1; | |
5114 | if (STRINGP (it.string)) | |
5115 | BYTEPOS (pos->pos) = string_char_to_byte (string, CHARPOS (pos->pos)); | |
5116 | else | |
e74aeda8 | 5117 | BYTEPOS (pos->pos) = buf_charpos_to_bytepos (XBUFFER (w->contents), |
425cc014 | 5118 | CHARPOS (pos->pos)); |
86282aab | 5119 | } |
6b61353c KH |
5120 | |
5121 | #ifdef HAVE_WINDOW_SYSTEM | |
5122 | if (it.what == IT_IMAGE) | |
5123 | { | |
6b61353c KH |
5124 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5125 | && !NILP (img->spec)) | |
5126 | *object = img->spec; | |
5127 | } | |
5128 | #endif | |
5129 | ||
b70d98e1 KS |
5130 | if (it.vpos < w->current_matrix->nrows |
5131 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5132 | row->enabled_p)) | |
6b61353c KH |
5133 | { |
5134 | if (it.hpos < row->used[TEXT_AREA]) | |
5135 | { | |
5136 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6b61353c | 5137 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5138 | if (img) |
5139 | { | |
5140 | *dy -= row->ascent - glyph->ascent; | |
4be9765d KH |
5141 | *dx += glyph->slice.img.x; |
5142 | *dy += glyph->slice.img.y; | |
cedd7cd9 KS |
5143 | /* Image slices positions are still relative to the entire image */ |
5144 | *width = img->width; | |
5145 | *height = img->height; | |
5146 | } | |
5147 | else | |
6b61353c | 5148 | #endif |
cedd7cd9 KS |
5149 | { |
5150 | *width = glyph->pixel_width; | |
5151 | *height = glyph->ascent + glyph->descent; | |
5152 | } | |
6b61353c KH |
5153 | } |
5154 | else | |
5155 | { | |
5156 | *width = 0; | |
5157 | *height = row->height; | |
5158 | } | |
5159 | } | |
5160 | else | |
5161 | { | |
5162 | *width = *height = 0; | |
5163 | } | |
5164 | ||
5165 | /* Add extra (default width) columns if clicked after EOL. */ | |
5e617bc2 | 5166 | x1 = max (0, it.current_x + it.pixel_width - it.first_visible_x); |
6b61353c KH |
5167 | if (x0 > x1) |
5168 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5169 | ||
5170 | *x = it.hpos; | |
5171 | *y = it.vpos; | |
5172 | ||
5173 | return string; | |
5f5c8ee5 | 5174 | } |
4588ec20 | 5175 | |
5f5c8ee5 GM |
5176 | |
5177 | /* Value is the string under window-relative coordinates X/Y in the | |
6b61353c KH |
5178 | mode line or header line (PART says which) of window W, or nil if none. |
5179 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
5180 | |
5181 | Lisp_Object | |
ace1712c | 5182 | mode_line_string (struct window *w, enum window_part part, |
d311d28c | 5183 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5184 | int *dx, int *dy, int *width, int *height) |
5f5c8ee5 GM |
5185 | { |
5186 | struct glyph_row *row; | |
5187 | struct glyph *glyph, *end; | |
6b61353c | 5188 | int x0, y0; |
5f5c8ee5 GM |
5189 | Lisp_Object string = Qnil; |
5190 | ||
641bdbf3 | 5191 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
5192 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
5193 | else | |
045dee35 | 5194 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
6b61353c KH |
5195 | y0 = *y - row->y; |
5196 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
5f5c8ee5 GM |
5197 | |
5198 | if (row->mode_line_p && row->enabled_p) | |
4588ec20 | 5199 | { |
5f5c8ee5 GM |
5200 | /* Find the glyph under X. If we find one with a string object, |
5201 | it's the one we were looking for. */ | |
5202 | glyph = row->glyphs[TEXT_AREA]; | |
5203 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 5204 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5205 | x0 -= glyph->pixel_width; |
5206 | *x = glyph - row->glyphs[TEXT_AREA]; | |
5207 | if (glyph < end) | |
5208 | { | |
5209 | string = glyph->object; | |
5210 | *charpos = glyph->charpos; | |
5211 | *width = glyph->pixel_width; | |
5212 | *height = glyph->ascent + glyph->descent; | |
5213 | #ifdef HAVE_WINDOW_SYSTEM | |
5214 | if (glyph->type == IMAGE_GLYPH) | |
5215 | { | |
5216 | struct image *img; | |
5217 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5218 | if (img != NULL) | |
5219 | *object = img->spec; | |
5220 | y0 -= row->ascent - glyph->ascent; | |
5221 | } | |
5222 | #endif | |
5223 | } | |
5224 | else | |
5225 | { | |
5226 | /* Add extra (default width) columns if clicked after EOL. */ | |
5227 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5228 | *width = 0; | |
5229 | *height = row->height; | |
5230 | } | |
5231 | } | |
5232 | else | |
5233 | { | |
5234 | *x = 0; | |
5235 | x0 = 0; | |
5236 | *width = *height = 0; | |
4588ec20 | 5237 | } |
5f5c8ee5 | 5238 | |
6b61353c KH |
5239 | *dx = x0; |
5240 | *dy = y0; | |
5241 | ||
5f5c8ee5 | 5242 | return string; |
4588ec20 | 5243 | } |
5f5c8ee5 GM |
5244 | |
5245 | ||
db1db309 GM |
5246 | /* Value is the string under window-relative coordinates X/Y in either |
5247 | marginal area, or nil if none. *CHARPOS is set to the position in | |
5248 | the string returned. */ | |
5249 | ||
5250 | Lisp_Object | |
ace1712c | 5251 | marginal_area_string (struct window *w, enum window_part part, |
d311d28c | 5252 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5253 | int *dx, int *dy, int *width, int *height) |
db1db309 GM |
5254 | { |
5255 | struct glyph_row *row = w->current_matrix->rows; | |
5256 | struct glyph *glyph, *end; | |
6b61353c | 5257 | int x0, y0, i, wy = *y; |
641bdbf3 | 5258 | int area; |
db1db309 GM |
5259 | Lisp_Object string = Qnil; |
5260 | ||
641bdbf3 | 5261 | if (part == ON_LEFT_MARGIN) |
db1db309 | 5262 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 5263 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
5264 | area = RIGHT_MARGIN_AREA; |
5265 | else | |
1088b922 | 5266 | emacs_abort (); |
db1db309 GM |
5267 | |
5268 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
5269 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
5270 | break; | |
6b61353c KH |
5271 | y0 = *y - row->y; |
5272 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
db1db309 GM |
5273 | |
5274 | if (row->enabled_p) | |
5275 | { | |
5276 | /* Find the glyph under X. If we find one with a string object, | |
5277 | it's the one we were looking for. */ | |
db1db309 | 5278 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 5279 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5280 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5281 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) |
5282 | + window_box_width (w, LEFT_MARGIN_AREA) | |
5283 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 5284 | else |
7df02016 | 5285 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5286 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5287 | : 0); |
5288 | ||
6b61353c KH |
5289 | glyph = row->glyphs[area]; |
5290 | end = glyph + row->used[area]; | |
cfde341f | 5291 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5292 | x0 -= glyph->pixel_width; |
5293 | *x = glyph - row->glyphs[area]; | |
5294 | if (glyph < end) | |
5295 | { | |
5296 | string = glyph->object; | |
5297 | *charpos = glyph->charpos; | |
5298 | *width = glyph->pixel_width; | |
5299 | *height = glyph->ascent + glyph->descent; | |
5300 | #ifdef HAVE_WINDOW_SYSTEM | |
5301 | if (glyph->type == IMAGE_GLYPH) | |
5302 | { | |
5303 | struct image *img; | |
5304 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5305 | if (img != NULL) | |
5306 | *object = img->spec; | |
5307 | y0 -= row->ascent - glyph->ascent; | |
4be9765d KH |
5308 | x0 += glyph->slice.img.x; |
5309 | y0 += glyph->slice.img.y; | |
6b61353c KH |
5310 | } |
5311 | #endif | |
5312 | } | |
5313 | else | |
5314 | { | |
5315 | /* Add extra (default width) columns if clicked after EOL. */ | |
5316 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5317 | *width = 0; | |
5318 | *height = row->height; | |
5319 | } | |
db1db309 | 5320 | } |
6b61353c KH |
5321 | else |
5322 | { | |
5323 | x0 = 0; | |
5324 | *x = 0; | |
5325 | *width = *height = 0; | |
5326 | } | |
5327 | ||
5328 | *dx = x0; | |
5329 | *dy = y0; | |
db1db309 GM |
5330 | |
5331 | return string; | |
5332 | } | |
5333 | ||
5334 | ||
5f5c8ee5 GM |
5335 | /*********************************************************************** |
5336 | Changing Frame Sizes | |
5337 | ***********************************************************************/ | |
4588ec20 JB |
5338 | |
5339 | #ifdef SIGWINCH | |
5f5c8ee5 | 5340 | |
20ef56db PE |
5341 | static void deliver_window_change_signal (int); |
5342 | ||
9af30bdf | 5343 | static void |
20ef56db | 5344 | handle_window_change_signal (int sig) |
4588ec20 JB |
5345 | { |
5346 | int width, height; | |
28d7d09f | 5347 | struct tty_display_info *tty; |
4d553a13 | 5348 | |
9628b887 KL |
5349 | /* The frame size change obviously applies to a single |
5350 | termcap-controlled terminal, but we can't decide which. | |
5351 | Therefore, we resize the frames corresponding to each tty. | |
9628b887 KL |
5352 | */ |
5353 | for (tty = tty_list; tty; tty = tty->next) { | |
4588ec20 | 5354 | |
0a125897 KL |
5355 | if (! tty->term_initted) |
5356 | continue; | |
4588ec20 | 5357 | |
db878925 DN |
5358 | /* Suspended tty frames have tty->input == NULL avoid trying to |
5359 | use it. */ | |
5360 | if (!tty->input) | |
5361 | continue; | |
5362 | ||
0b0d3e0b | 5363 | get_tty_size (fileno (tty->input), &width, &height); |
3fc809e2 | 5364 | |
bedeffcf | 5365 | if (width > 5 && height > 2) { |
9628b887 | 5366 | Lisp_Object tail, frame; |
3fc809e2 | 5367 | |
9628b887 | 5368 | FOR_EACH_FRAME (tail, frame) |
4d553a13 KL |
5369 | if (FRAME_TERMCAP_P (XFRAME (frame)) && FRAME_TTY (XFRAME (frame)) == tty) |
5370 | /* Record the new sizes, but don't reallocate the data | |
5371 | structures now. Let that be done later outside of the | |
5372 | signal handler. */ | |
5373 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); | |
9628b887 | 5374 | } |
4588ec20 | 5375 | } |
20ef56db | 5376 | } |
3fc809e2 | 5377 | |
20ef56db PE |
5378 | static void |
5379 | deliver_window_change_signal (int sig) | |
5380 | { | |
4d7e6e51 | 5381 | deliver_process_signal (sig, handle_window_change_signal); |
4588ec20 JB |
5382 | } |
5383 | #endif /* SIGWINCH */ | |
5384 | ||
5385 | ||
59ea14cd PE |
5386 | /* Do any change in frame size that was requested by a signal. |
5387 | SAFE means this function is called from a place where it is | |
5388 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 5389 | |
dfcf069d | 5390 | void |
59ea14cd | 5391 | do_pending_window_change (bool safe) |
4588ec20 | 5392 | { |
20ef56db | 5393 | /* If window change signal handler should have run before, run it now. */ |
b96fd3e8 GM |
5394 | if (redisplaying_p && !safe) |
5395 | return; | |
177c0ea7 | 5396 | |
4588ec20 JB |
5397 | while (delayed_size_change) |
5398 | { | |
35f56f96 | 5399 | Lisp_Object tail, frame; |
4588ec20 JB |
5400 | |
5401 | delayed_size_change = 0; | |
5402 | ||
35f56f96 | 5403 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5404 | { |
5f5c8ee5 | 5405 | struct frame *f = XFRAME (frame); |
35f56f96 | 5406 | |
7df02016 KS |
5407 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
5408 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
5409 | 0, 0, safe); | |
4588ec20 JB |
5410 | } |
5411 | } | |
5412 | } | |
5413 | ||
5414 | ||
502b9b64 | 5415 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 5416 | indicate no change is to take place. |
4588ec20 | 5417 | |
59ea14cd PE |
5418 | If DELAY, assume we're being called from a signal handler, and |
5419 | queue the change for later - perhaps the next redisplay. | |
5420 | Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
5421 | from a signal handler. |
5422 | ||
59ea14cd | 5423 | SAFE means this function is called from a place where it's |
b96fd3e8 | 5424 | safe to change frame sizes while a redisplay is in progress. */ |
b6a65ac2 | 5425 | |
dfcf069d | 5426 | void |
59ea14cd PE |
5427 | change_frame_size (struct frame *f, int newheight, int newwidth, |
5428 | bool pretend, bool delay, bool safe) | |
45140e01 RS |
5429 | { |
5430 | Lisp_Object tail, frame; | |
3826ea1a | 5431 | |
9628b887 | 5432 | if (FRAME_MSDOS_P (f)) |
45140e01 | 5433 | { |
9628b887 KL |
5434 | /* On MS-DOS, all frames use the same screen, so a change in |
5435 | size affects all frames. Termcap now supports multiple | |
5436 | ttys. */ | |
45140e01 | 5437 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 5438 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 5439 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 5440 | pretend, delay, safe); |
45140e01 RS |
5441 | } |
5442 | else | |
b96fd3e8 | 5443 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
5444 | } |
5445 | ||
5446 | static void | |
59ea14cd PE |
5447 | change_frame_size_1 (struct frame *f, int newheight, int newwidth, |
5448 | bool pretend, bool delay, bool safe) | |
4588ec20 | 5449 | { |
7df02016 | 5450 | int new_frame_total_cols; |
d311d28c | 5451 | ptrdiff_t count = SPECPDL_INDEX (); |
3826ea1a | 5452 | |
4588ec20 | 5453 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 5454 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 5455 | { |
7df02016 KS |
5456 | f->new_text_lines = newheight; |
5457 | f->new_text_cols = newwidth; | |
4588ec20 JB |
5458 | delayed_size_change = 1; |
5459 | return; | |
5460 | } | |
5461 | ||
502b9b64 | 5462 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
5463 | f->new_text_lines = 0; |
5464 | f->new_text_cols = 0; | |
b6a65ac2 | 5465 | |
08f7aa3e | 5466 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 5467 | if (newheight == 0) |
7df02016 | 5468 | newheight = FRAME_LINES (f); |
ae19c6f2 | 5469 | if (newwidth == 0) |
7df02016 | 5470 | newwidth = FRAME_COLS (f); |
3826ea1a | 5471 | |
3b95a6f9 | 5472 | /* Compute width of windows in F. */ |
b6a65ac2 | 5473 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 5474 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 | 5475 | |
3b95a6f9 MR |
5476 | /* This is the width of the frame with vertical scroll bars and fringe |
5477 | columns. Do this after rounding - see discussion of bug#9723. */ | |
5478 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); | |
5479 | ||
b6a65ac2 | 5480 | /* If we're not changing the frame size, quit now. */ |
3b95a6f9 MR |
5481 | /* Frame width may be unchanged but the text portion may change, for |
5482 | example, fullscreen and remove/add scroll bar. */ | |
7df02016 | 5483 | if (newheight == FRAME_LINES (f) |
3b95a6f9 MR |
5484 | /* Text portion unchanged? */ |
5485 | && newwidth == FRAME_COLS (f) | |
5486 | /* Frame width unchanged? */ | |
5487 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) | |
4588ec20 JB |
5488 | return; |
5489 | ||
4d7e6e51 | 5490 | block_input (); |
cbb95688 | 5491 | |
886a8a6c KH |
5492 | #ifdef MSDOS |
5493 | /* We only can set screen dimensions to certain values supported | |
5494 | by our video hardware. Try to find the smallest size greater | |
5495 | or equal to the requested dimensions. */ | |
5496 | dos_set_window_size (&newheight, &newwidth); | |
5497 | #endif | |
5498 | ||
7df02016 | 5499 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 5500 | { |
562dd5e9 | 5501 | resize_frame_windows (f, newheight, 0); |
b6a65ac2 | 5502 | |
48e482e6 EZ |
5503 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5504 | manipulating video hardware. */ | |
5505 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5506 | FrameRows (FRAME_TTY (f)) = newheight; |
4588ec20 JB |
5507 | } |
5508 | ||
7df02016 | 5509 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 5510 | { |
562dd5e9 | 5511 | resize_frame_windows (f, new_frame_total_cols, 1); |
4588ec20 | 5512 | |
48e482e6 EZ |
5513 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5514 | manipulating video hardware. */ | |
5515 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5516 | FrameCols (FRAME_TTY (f)) = newwidth; |
5f5c8ee5 | 5517 | |
742516e0 | 5518 | #if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS) |
e69b0960 | 5519 | if (WINDOWP (f->tool_bar_window)) |
5f24fa51 | 5520 | XWINDOW (f->tool_bar_window)->total_cols = newwidth; |
742516e0 | 5521 | #endif |
4588ec20 JB |
5522 | } |
5523 | ||
7df02016 KS |
5524 | FRAME_LINES (f) = newheight; |
5525 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 5526 | |
5f5c8ee5 GM |
5527 | { |
5528 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
5529 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 5530 | |
5f5c8ee5 GM |
5531 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
5532 | &text_area_height); | |
5533 | if (w->cursor.x >= text_area_x + text_area_width) | |
5534 | w->cursor.hpos = w->cursor.x = 0; | |
5535 | if (w->cursor.y >= text_area_y + text_area_height) | |
5536 | w->cursor.vpos = w->cursor.y = 0; | |
5537 | } | |
986e61b8 | 5538 | |
bd0443bb | 5539 | adjust_frame_glyphs (f); |
5f5c8ee5 | 5540 | calculate_costs (f); |
cb02fa39 GM |
5541 | SET_FRAME_GARBAGED (f); |
5542 | f->resized_p = 1; | |
97cf50e7 | 5543 | |
4d7e6e51 | 5544 | unblock_input (); |
61730a69 | 5545 | |
66322887 | 5546 | record_unwind_current_buffer (); |
e523f7e5 | 5547 | |
ef264c42 | 5548 | run_window_configuration_change_hook (f); |
e523f7e5 RS |
5549 | |
5550 | unbind_to (count, Qnil); | |
4588ec20 | 5551 | } |
5f5c8ee5 GM |
5552 | |
5553 | ||
4588ec20 | 5554 | \f |
5f5c8ee5 GM |
5555 | /*********************************************************************** |
5556 | Terminal Related Lisp Functions | |
5557 | ***********************************************************************/ | |
5558 | ||
5559 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 5560 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
5561 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
5562 | FILE = nil means just close any termscript file currently open. */) | |
5842a27b | 5563 | (Lisp_Object file) |
5f5c8ee5 | 5564 | { |
0b0d3e0b KL |
5565 | struct tty_display_info *tty; |
5566 | ||
7d2f1216 EZ |
5567 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ()) |
5568 | && ! FRAME_MSDOS_P (SELECTED_FRAME ())) | |
0b0d3e0b KL |
5569 | error ("Current frame is not on a tty device"); |
5570 | ||
5571 | tty = CURTTY (); | |
5572 | ||
5573 | if (tty->termscript != 0) | |
406af475 PE |
5574 | { |
5575 | block_input (); | |
5576 | fclose (tty->termscript); | |
5577 | tty->termscript = 0; | |
5578 | unblock_input (); | |
5579 | } | |
5f5c8ee5 GM |
5580 | |
5581 | if (! NILP (file)) | |
5582 | { | |
5583 | file = Fexpand_file_name (file, Qnil); | |
406af475 | 5584 | tty->termscript = emacs_fopen (SSDATA (file), "w"); |
0b0d3e0b | 5585 | if (tty->termscript == 0) |
a9757f6a | 5586 | report_file_error ("Opening termscript", file); |
5f5c8ee5 GM |
5587 | } |
5588 | return Qnil; | |
5589 | } | |
5590 | ||
5591 | ||
4588ec20 | 5592 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
62af879c | 5593 | Ssend_string_to_terminal, 1, 2, 0, |
7ee72033 | 5594 | doc: /* Send STRING to the terminal without alteration. |
62af879c KL |
5595 | Control characters in STRING will have terminal-dependent effects. |
5596 | ||
6ed8eeff | 5597 | Optional parameter TERMINAL specifies the tty terminal device to use. |
558759e4 AM |
5598 | It may be a terminal object, a frame, or nil for the terminal used by |
5599 | the currently selected frame. In batch mode, STRING is sent to stdout | |
5600 | when TERMINAL is nil. */) | |
5842a27b | 5601 | (Lisp_Object string, Lisp_Object terminal) |
4588ec20 | 5602 | { |
7cef7ce3 SM |
5603 | struct terminal *t = get_terminal (terminal, 1); |
5604 | FILE *out; | |
0b0d3e0b | 5605 | |
94f3db62 | 5606 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 5607 | CHECK_STRING (string); |
4d7e6e51 | 5608 | block_input (); |
0b0d3e0b | 5609 | |
6ed8eeff KL |
5610 | if (!t) |
5611 | error ("Unknown terminal device"); | |
0b0d3e0b | 5612 | |
7cef7ce3 SM |
5613 | if (t->type == output_initial) |
5614 | out = stdout; | |
5615 | else if (t->type != output_termcap && t->type != output_msdos_raw) | |
5616 | error ("Device %d is not a termcap terminal device", t->id); | |
5617 | else | |
5618 | { | |
5619 | struct tty_display_info *tty = t->display_info.tty; | |
3fc809e2 | 5620 | |
7cef7ce3 SM |
5621 | if (! tty->output) |
5622 | error ("Terminal is currently suspended"); | |
cecfdea6 | 5623 | |
7cef7ce3 SM |
5624 | if (tty->termscript) |
5625 | { | |
5626 | fwrite (SDATA (string), 1, SBYTES (string), tty->termscript); | |
5627 | fflush (tty->termscript); | |
5628 | } | |
5629 | out = tty->output; | |
4588ec20 | 5630 | } |
7cef7ce3 SM |
5631 | fwrite (SDATA (string), 1, SBYTES (string), out); |
5632 | fflush (out); | |
4d7e6e51 | 5633 | unblock_input (); |
4588ec20 JB |
5634 | return Qnil; |
5635 | } | |
5636 | ||
5f5c8ee5 | 5637 | |
a7ca3326 | 5638 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 5639 | doc: /* Beep, or flash the screen. |
228299fa | 5640 | Also, unless an argument is given, |
7ee72033 | 5641 | terminate any keyboard macro currently executing. */) |
5842a27b | 5642 | (Lisp_Object arg) |
4588ec20 | 5643 | { |
efb859b4 | 5644 | if (!NILP (arg)) |
4588ec20 | 5645 | { |
7fa788da RS |
5646 | if (noninteractive) |
5647 | putchar (07); | |
5648 | else | |
385ed61f | 5649 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5650 | } |
5651 | else | |
5652 | bitch_at_user (); | |
5653 | ||
5654 | return Qnil; | |
5655 | } | |
5656 | ||
dfcf069d | 5657 | void |
971de7fb | 5658 | bitch_at_user (void) |
4588ec20 JB |
5659 | { |
5660 | if (noninteractive) | |
5661 | putchar (07); | |
5f5c8ee5 | 5662 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
81519fd2 SM |
5663 | { |
5664 | const char *msg | |
5665 | = "Keyboard macro terminated by a command ringing the bell"; | |
6c6f1994 | 5666 | Fsignal (Quser_error, list1 (build_string (msg))); |
81519fd2 | 5667 | } |
4588ec20 | 5668 | else |
385ed61f | 5669 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5670 | } |
5671 | ||
5f5c8ee5 GM |
5672 | |
5673 | \f | |
5674 | /*********************************************************************** | |
5675 | Sleeping, Waiting | |
5676 | ***********************************************************************/ | |
5677 | ||
a7ca3326 | 5678 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 5679 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
5680 | SECONDS may be a floating-point value, meaning that you can wait for a |
5681 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
d35af63c | 5682 | additional wait period, in milliseconds; this is for backwards compatibility. |
7ee72033 | 5683 | \(Not all operating systems support waiting for a fraction of a second.) */) |
5842a27b | 5684 | (Lisp_Object seconds, Lisp_Object milliseconds) |
4588ec20 | 5685 | { |
d311d28c | 5686 | double duration = extract_float (seconds); |
4588ec20 | 5687 | |
d311d28c PE |
5688 | if (!NILP (milliseconds)) |
5689 | { | |
5690 | CHECK_NUMBER (milliseconds); | |
5691 | duration += XINT (milliseconds) / 1000.0; | |
5692 | } | |
b07646f5 | 5693 | |
908589fd | 5694 | if (duration > 0) |
d35af63c | 5695 | { |
43aac990 PE |
5696 | struct timespec t = dtotimespec (duration); |
5697 | wait_reading_process_output (min (t.tv_sec, WAIT_READING_MAX), | |
5698 | t.tv_nsec, 0, 0, Qnil, NULL, 0); | |
d35af63c | 5699 | } |
4588ec20 JB |
5700 | |
5701 | return Qnil; | |
5702 | } | |
5703 | ||
5f5c8ee5 | 5704 | |
dcd1ca45 | 5705 | /* This is just like wait_reading_process_output, except that |
902b9b6d | 5706 | it does redisplay. |
f76475ad | 5707 | |
2bcac766 CY |
5708 | TIMEOUT is number of seconds to wait (float or integer), |
5709 | or t to wait forever. | |
59ea14cd | 5710 | READING is true if reading input. |
9fa1de30 PE |
5711 | If DISPLAY_OPTION is >0 display process output while waiting. |
5712 | If DISPLAY_OPTION is >1 perform an initial redisplay before waiting. | |
902b9b6d | 5713 | */ |
4588ec20 | 5714 | |
f76475ad | 5715 | Lisp_Object |
9fa1de30 | 5716 | sit_for (Lisp_Object timeout, bool reading, int display_option) |
f76475ad | 5717 | { |
d35af63c PE |
5718 | intmax_t sec; |
5719 | int nsec; | |
9fa1de30 | 5720 | bool do_display = display_option > 0; |
f222369e | 5721 | |
902b9b6d | 5722 | swallow_events (do_display); |
ccddf474 | 5723 | |
902b9b6d | 5724 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 5725 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 5726 | return Qnil; |
4588ec20 | 5727 | |
9fa1de30 | 5728 | if (display_option > 1) |
902b9b6d KS |
5729 | redisplay_preserve_echo_area (2); |
5730 | ||
d35af63c | 5731 | if (INTEGERP (timeout)) |
2bcac766 | 5732 | { |
d35af63c | 5733 | sec = XINT (timeout); |
908589fd | 5734 | if (sec <= 0) |
d35af63c PE |
5735 | return Qt; |
5736 | nsec = 0; | |
2bcac766 | 5737 | } |
d35af63c | 5738 | else if (FLOATP (timeout)) |
d311d28c | 5739 | { |
d35af63c | 5740 | double seconds = XFLOAT_DATA (timeout); |
7216e43b | 5741 | if (! (0 < seconds)) |
d311d28c | 5742 | return Qt; |
d35af63c PE |
5743 | else |
5744 | { | |
43aac990 PE |
5745 | struct timespec t = dtotimespec (seconds); |
5746 | sec = min (t.tv_sec, WAIT_READING_MAX); | |
5747 | nsec = t.tv_nsec; | |
d35af63c PE |
5748 | } |
5749 | } | |
5750 | else if (EQ (timeout, Qt)) | |
5751 | { | |
5752 | sec = 0; | |
5753 | nsec = 0; | |
d311d28c | 5754 | } |
d35af63c PE |
5755 | else |
5756 | wrong_type_argument (Qnumberp, timeout); | |
5757 | ||
dfdb645c | 5758 | |
4a4bbad2 | 5759 | #ifdef USABLE_SIGIO |
f75beb47 | 5760 | gobble_input (); |
f76475ad JB |
5761 | #endif |
5762 | ||
d35af63c | 5763 | wait_reading_process_output (sec, nsec, reading ? -1 : 1, do_display, |
dcd1ca45 | 5764 | Qnil, NULL, 0); |
f76475ad | 5765 | |
4588ec20 JB |
5766 | return detect_input_pending () ? Qnil : Qt; |
5767 | } | |
5768 | ||
5f5c8ee5 | 5769 | |
a7ca3326 | 5770 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
025de85b CY |
5771 | doc: /* Perform redisplay. |
5772 | Optional arg FORCE, if non-nil, prevents redisplay from being | |
5773 | preempted by arriving input, even if `redisplay-dont-pause' is nil. | |
5774 | If `redisplay-dont-pause' is non-nil (the default), redisplay is never | |
5775 | preempted by arriving input, so FORCE does nothing. | |
5776 | ||
5777 | Return t if redisplay was performed, nil if redisplay was preempted | |
5778 | immediately by pending input. */) | |
5842a27b | 5779 | (Lisp_Object force) |
f76475ad | 5780 | { |
d311d28c | 5781 | ptrdiff_t count; |
659d9874 | 5782 | |
902b9b6d KS |
5783 | swallow_events (1); |
5784 | if ((detect_input_pending_run_timers (1) | |
01327edf | 5785 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
5786 | || !NILP (Vexecuting_kbd_macro)) |
5787 | return Qnil; | |
f76475ad | 5788 | |
01327edf KS |
5789 | count = SPECPDL_INDEX (); |
5790 | if (!NILP (force) && !redisplay_dont_pause) | |
5791 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 5792 | redisplay_preserve_echo_area (2); |
01327edf | 5793 | unbind_to (count, Qnil); |
7ba07a1a | 5794 | return Qt; |
f76475ad | 5795 | } |
5f5c8ee5 GM |
5796 | |
5797 | ||
5798 | \f | |
5799 | /*********************************************************************** | |
5800 | Other Lisp Functions | |
5801 | ***********************************************************************/ | |
5802 | ||
5803 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
5804 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 5805 | buffer-modified-flags. */ |
5f5c8ee5 GM |
5806 | |
5807 | static Lisp_Object frame_and_buffer_state; | |
5808 | ||
5809 | ||
5810 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 5811 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 5812 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
5813 | VARIABLE is a variable name whose value is either nil or a state vector |
5814 | that will be updated to contain all frames and buffers, | |
228299fa | 5815 | aside from buffers whose names start with space, |
44edd521 RS |
5816 | along with the buffers' read-only and modified flags. This allows a fast |
5817 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 5818 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
5819 | the current state. |
5820 | ||
5821 | If VARIABLE is nil, an internal variable is used. Users should not | |
5822 | pass nil for VARIABLE. */) | |
5842a27b | 5823 | (Lisp_Object variable) |
5f5c8ee5 | 5824 | { |
44edd521 | 5825 | Lisp_Object state, tail, frame, buf; |
086ca913 | 5826 | ptrdiff_t n, idx; |
5f5c8ee5 | 5827 | |
44edd521 RS |
5828 | if (! NILP (variable)) |
5829 | { | |
5830 | CHECK_SYMBOL (variable); | |
5831 | state = Fsymbol_value (variable); | |
5832 | if (! VECTORP (state)) | |
5833 | goto changed; | |
5834 | } | |
5835 | else | |
5836 | state = frame_and_buffer_state; | |
5837 | ||
086ca913 | 5838 | idx = 0; |
5f5c8ee5 GM |
5839 | FOR_EACH_FRAME (tail, frame) |
5840 | { | |
086ca913 | 5841 | if (idx == ASIZE (state)) |
44edd521 | 5842 | goto changed; |
086ca913 | 5843 | if (!EQ (AREF (state, idx++), frame)) |
5f5c8ee5 | 5844 | goto changed; |
086ca913 | 5845 | if (idx == ASIZE (state)) |
44edd521 | 5846 | goto changed; |
086ca913 | 5847 | if (!EQ (AREF (state, idx++), XFRAME (frame)->name)) |
5f5c8ee5 GM |
5848 | goto changed; |
5849 | } | |
44edd521 | 5850 | /* Check that the buffer info matches. */ |
8f3a2c26 | 5851 | FOR_EACH_LIVE_BUFFER (tail, buf) |
5f5c8ee5 | 5852 | { |
5f5c8ee5 | 5853 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 5854 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 5855 | continue; |
086ca913 | 5856 | if (idx == ASIZE (state)) |
44edd521 | 5857 | goto changed; |
086ca913 | 5858 | if (!EQ (AREF (state, idx++), buf)) |
5f5c8ee5 | 5859 | goto changed; |
086ca913 | 5860 | if (idx == ASIZE (state)) |
44edd521 | 5861 | goto changed; |
086ca913 | 5862 | if (!EQ (AREF (state, idx++), BVAR (XBUFFER (buf), read_only))) |
5f5c8ee5 | 5863 | goto changed; |
086ca913 | 5864 | if (idx == ASIZE (state)) |
44edd521 | 5865 | goto changed; |
086ca913 | 5866 | if (!EQ (AREF (state, idx++), Fbuffer_modified_p (buf))) |
5f5c8ee5 GM |
5867 | goto changed; |
5868 | } | |
086ca913 | 5869 | if (idx == ASIZE (state)) |
44edd521 | 5870 | goto changed; |
5f5c8ee5 | 5871 | /* Detect deletion of a buffer at the end of the list. */ |
086ca913 | 5872 | if (EQ (AREF (state, idx), Qlambda)) |
5f5c8ee5 | 5873 | return Qnil; |
44edd521 RS |
5874 | |
5875 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 5876 | changed: |
44edd521 RS |
5877 | /* Count the size we will need. |
5878 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
5879 | n = 1; |
5880 | FOR_EACH_FRAME (tail, frame) | |
5881 | n += 2; | |
8f3a2c26 | 5882 | FOR_EACH_LIVE_BUFFER (tail, buf) |
5f5c8ee5 | 5883 | n += 3; |
44edd521 RS |
5884 | /* Reallocate the vector if data has grown to need it, |
5885 | or if it has shrunk a lot. */ | |
5886 | if (! VECTORP (state) | |
77b37c05 PE |
5887 | || n > ASIZE (state) |
5888 | || n + 20 < ASIZE (state) / 2) | |
5f5c8ee5 | 5889 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
5890 | { |
5891 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
5892 | if (! NILP (variable)) | |
5893 | Fset (variable, state); | |
5894 | else | |
5895 | frame_and_buffer_state = state; | |
5896 | } | |
5897 | ||
5898 | /* Record the new data in the (possibly reallocated) vector. */ | |
086ca913 | 5899 | idx = 0; |
5f5c8ee5 GM |
5900 | FOR_EACH_FRAME (tail, frame) |
5901 | { | |
086ca913 DA |
5902 | ASET (state, idx, frame); |
5903 | idx++; | |
5904 | ASET (state, idx, XFRAME (frame)->name); | |
5905 | idx++; | |
5f5c8ee5 | 5906 | } |
8f3a2c26 | 5907 | FOR_EACH_LIVE_BUFFER (tail, buf) |
5f5c8ee5 | 5908 | { |
5f5c8ee5 | 5909 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 5910 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 5911 | continue; |
086ca913 DA |
5912 | ASET (state, idx, buf); |
5913 | idx++; | |
5914 | ASET (state, idx, BVAR (XBUFFER (buf), read_only)); | |
5915 | idx++; | |
5916 | ASET (state, idx, Fbuffer_modified_p (buf)); | |
5917 | idx++; | |
5f5c8ee5 GM |
5918 | } |
5919 | /* Fill up the vector with lambdas (always at least one). */ | |
086ca913 DA |
5920 | ASET (state, idx, Qlambda); |
5921 | idx++; | |
5922 | while (idx < ASIZE (state)) | |
5923 | { | |
5924 | ASET (state, idx, Qlambda); | |
5925 | idx++; | |
5926 | } | |
5f5c8ee5 | 5927 | /* Make sure we didn't overflow the vector. */ |
086ca913 | 5928 | eassert (idx <= ASIZE (state)); |
5f5c8ee5 GM |
5929 | return Qt; |
5930 | } | |
5931 | ||
5932 | ||
4588ec20 | 5933 | \f |
5f5c8ee5 GM |
5934 | /*********************************************************************** |
5935 | Initialization | |
5936 | ***********************************************************************/ | |
5937 | ||
5f5c8ee5 GM |
5938 | /* Initialization done when Emacs fork is started, before doing stty. |
5939 | Determine terminal type and set terminal_driver. Then invoke its | |
5940 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 5941 | |
dfcf069d | 5942 | void |
971de7fb | 5943 | init_display (void) |
4588ec20 | 5944 | { |
28d440ab KL |
5945 | char *terminal_type; |
5946 | ||
5f5c8ee5 GM |
5947 | /* Construct the space glyph. */ |
5948 | space_glyph.type = CHAR_GLYPH; | |
3fc809e2 | 5949 | SET_CHAR_GLYPH (space_glyph, ' ', DEFAULT_FACE_ID, 0); |
5f5c8ee5 GM |
5950 | space_glyph.charpos = -1; |
5951 | ||
4588ec20 JB |
5952 | inverse_video = 0; |
5953 | cursor_in_echo_area = 0; | |
4588ec20 | 5954 | |
1315c181 JB |
5955 | /* Now is the time to initialize this; it's used by init_sys_modes |
5956 | during startup. */ | |
2246281f | 5957 | Vinitial_window_system = Qnil; |
4588ec20 | 5958 | |
4181ad9c KL |
5959 | /* SIGWINCH needs to be handled no matter what display we start |
5960 | with. Otherwise newly opened tty frames will not resize | |
5961 | automatically. */ | |
5962 | #ifdef SIGWINCH | |
5963 | #ifndef CANNOT_DUMP | |
5964 | if (initialized) | |
5965 | #endif /* CANNOT_DUMP */ | |
2fe28299 PE |
5966 | { |
5967 | struct sigaction action; | |
5968 | emacs_sigaction_init (&action, deliver_window_change_signal); | |
5969 | sigaction (SIGWINCH, &action, 0); | |
5970 | } | |
4181ad9c | 5971 | #endif /* SIGWINCH */ |
4588ec20 | 5972 | |
d6ef42b9 | 5973 | /* If running as a daemon, no need to initialize any frames/terminal. */ |
ff808935 DN |
5974 | if (IS_DAEMON) |
5975 | return; | |
d6ef42b9 | 5976 | |
1315c181 JB |
5977 | /* If the user wants to use a window system, we shouldn't bother |
5978 | initializing the terminal. This is especially important when the | |
5979 | terminal is so dumb that emacs gives up before and doesn't bother | |
5980 | using the window system. | |
4588ec20 | 5981 | |
36bbad1d KH |
5982 | If the DISPLAY environment variable is set and nonempty, |
5983 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
5984 | |
5985 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 5986 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 5987 | { |
36bbad1d | 5988 | char *display; |
36bbad1d | 5989 | display = getenv ("DISPLAY"); |
36bbad1d | 5990 | display_arg = (display != 0 && *display != 0); |
c1fc674b AS |
5991 | |
5992 | if (display_arg && !x_display_ok (display)) | |
5993 | { | |
5994 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
5995 | display); | |
5996 | inhibit_window_system = 1; | |
5997 | } | |
f040093a | 5998 | } |
d460af17 | 5999 | |
4fcc2638 | 6000 | if (!inhibit_window_system && display_arg) |
4588ec20 | 6001 | { |
111d9af3 | 6002 | Vinitial_window_system = Qx; |
4588ec20 JB |
6003 | #ifdef HAVE_X11 |
6004 | Vwindow_system_version = make_number (11); | |
039e5d71 | 6005 | #endif |
a29c3e6d | 6006 | #ifdef USE_NCURSES |
039e5d71 | 6007 | /* In some versions of ncurses, |
6a428f77 | 6008 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6009 | So call tgetent. */ |
6010 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 JB |
6011 | #endif |
6012 | return; | |
6013 | } | |
6014 | #endif /* HAVE_X_WINDOWS */ | |
6015 | ||
fd2e066a | 6016 | #ifdef HAVE_NTGUI |
177c0ea7 | 6017 | if (!inhibit_window_system) |
fd2e066a | 6018 | { |
111d9af3 | 6019 | Vinitial_window_system = Qw32; |
fd2e066a GV |
6020 | Vwindow_system_version = make_number (1); |
6021 | return; | |
6022 | } | |
6023 | #endif /* HAVE_NTGUI */ | |
6024 | ||
edfda783 AR |
6025 | #ifdef HAVE_NS |
6026 | if (!inhibit_window_system | |
6027 | #ifndef CANNOT_DUMP | |
6028 | && initialized | |
6029 | #endif | |
6030 | ) | |
6031 | { | |
111d9af3 | 6032 | Vinitial_window_system = Qns; |
5e617bc2 | 6033 | Vwindow_system_version = make_number (10); |
edfda783 AR |
6034 | return; |
6035 | } | |
6036 | #endif | |
6037 | ||
4588ec20 JB |
6038 | /* If no window system has been specified, try to use the terminal. */ |
6039 | if (! isatty (0)) | |
d9df6f40 | 6040 | fatal ("standard input is not a tty"); |
4588ec20 | 6041 | |
6152361f JR |
6042 | #ifdef WINDOWSNT |
6043 | terminal_type = "w32console"; | |
6044 | #else | |
83be8524 | 6045 | terminal_type = getenv ("TERM"); |
6152361f | 6046 | #endif |
4588ec20 JB |
6047 | if (!terminal_type) |
6048 | { | |
5d12ff0b | 6049 | #ifdef HAVE_WINDOW_SYSTEM |
b9e590fc RS |
6050 | if (! inhibit_window_system) |
6051 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6052 | else |
6053 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6054 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
4588ec20 JB |
6055 | exit (1); |
6056 | } | |
6057 | ||
0a125897 | 6058 | { |
6ed8eeff | 6059 | struct terminal *t; |
3224dac1 KL |
6060 | struct frame *f = XFRAME (selected_frame); |
6061 | ||
322aea6d PE |
6062 | init_foreground_group (); |
6063 | ||
3224dac1 | 6064 | /* Open a display on the controlling tty. */ |
6ed8eeff | 6065 | t = init_tty (0, terminal_type, 1); /* Errors are fatal. */ |
3224dac1 KL |
6066 | |
6067 | /* Convert the initial frame to use the new display. */ | |
b04f5ad2 | 6068 | if (f->output_method != output_initial) |
1088b922 | 6069 | emacs_abort (); |
6ed8eeff KL |
6070 | f->output_method = t->type; |
6071 | f->terminal = t; | |
3224dac1 | 6072 | |
6ed8eeff | 6073 | t->reference_count++; |
7ac5dac9 EZ |
6074 | #ifdef MSDOS |
6075 | f->output_data.tty->display_info = &the_only_display_info; | |
6076 | #else | |
6077 | if (f->output_method == output_termcap) | |
6078 | create_tty_output (f); | |
6079 | #endif | |
6ed8eeff | 6080 | t->display_info.tty->top_frame = selected_frame; |
5b65d888 | 6081 | change_frame_size (XFRAME (selected_frame), |
6ed8eeff KL |
6082 | FrameRows (t->display_info.tty), |
6083 | FrameCols (t->display_info.tty), 0, 0, 1); | |
3224dac1 | 6084 | |
6ed8eeff KL |
6085 | /* Delete the initial terminal. */ |
6086 | if (--initial_terminal->reference_count == 0 | |
6087 | && initial_terminal->delete_terminal_hook) | |
6088 | (*initial_terminal->delete_terminal_hook) (initial_terminal); | |
2666355c KL |
6089 | |
6090 | /* Update frame parameters to reflect the new type. */ | |
6091 | Fmodify_frame_parameters | |
6c6f1994 PE |
6092 | (selected_frame, list1 (Fcons (Qtty_type, |
6093 | Ftty_type (selected_frame)))); | |
657ceaa0 | 6094 | if (t->display_info.tty->name) |
6c6f1994 PE |
6095 | Fmodify_frame_parameters |
6096 | (selected_frame, | |
6097 | list1 (Fcons (Qtty, build_string (t->display_info.tty->name)))); | |
657ceaa0 | 6098 | else |
6c6f1994 | 6099 | Fmodify_frame_parameters (selected_frame, list1 (Fcons (Qtty, Qnil))); |
0a125897 | 6100 | } |
3fc809e2 | 6101 | |
d86c299a | 6102 | { |
91fb7e1b | 6103 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6104 | int width = FRAME_TOTAL_COLS (sf); |
6105 | int height = FRAME_LINES (sf); | |
d86c299a | 6106 | |
5f5c8ee5 | 6107 | /* If these sizes are so big they cause overflow, just ignore the |
dfd153ae PE |
6108 | change. It's not clear what better we could do. The rest of |
6109 | the code assumes that (width + 2) * height * sizeof (struct glyph) | |
6110 | does not overflow and does not exceed PTRDIFF_MAX or SIZE_MAX. */ | |
e3c25c68 PE |
6111 | if (INT_ADD_RANGE_OVERFLOW (width, 2, INT_MIN, INT_MAX) |
6112 | || INT_MULTIPLY_RANGE_OVERFLOW (width + 2, height, INT_MIN, INT_MAX) | |
dfd153ae PE |
6113 | || (min (PTRDIFF_MAX, SIZE_MAX) / sizeof (struct glyph) |
6114 | < (width + 2) * height)) | |
1559a86d | 6115 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6116 | } |
6117 | ||
91fb7e1b | 6118 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6119 | |
5f5c8ee5 GM |
6120 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ |
6121 | if (initialized | |
6122 | && !noninteractive | |
2246281f | 6123 | && NILP (Vinitial_window_system)) |
2d764c78 EZ |
6124 | { |
6125 | /* For the initial frame, we don't have any way of knowing what | |
6126 | are the foreground and background colors of the terminal. */ | |
5e617bc2 | 6127 | struct frame *sf = SELECTED_FRAME (); |
2d764c78 | 6128 | |
f9d2fdc4 EZ |
6129 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
6130 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
6131 | call0 (intern ("tty-set-up-initial-frame-faces")); |
6132 | } | |
5f5c8ee5 GM |
6133 | } |
6134 | ||
6135 | ||
6136 | \f | |
6137 | /*********************************************************************** | |
6138 | Blinking cursor | |
6139 | ***********************************************************************/ | |
6140 | ||
c3f13540 | 6141 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 6142 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 6143 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
6144 | WINDOW nil means use the selected window. SHOW non-nil means |
6145 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 | 6146 | don't show a cursor. */) |
5842a27b | 6147 | (Lisp_Object window, Lisp_Object show) |
5f5c8ee5 | 6148 | { |
5f5c8ee5 GM |
6149 | /* Don't change cursor state while redisplaying. This could confuse |
6150 | output routines. */ | |
6151 | if (!redisplaying_p) | |
b9e9df47 | 6152 | decode_any_window (window)->cursor_off_p = NILP (show); |
5f5c8ee5 | 6153 | return Qnil; |
4588ec20 | 6154 | } |
5f5c8ee5 GM |
6155 | |
6156 | ||
5d7791b3 GM |
6157 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
6158 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 6159 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 | 6160 | WINDOW nil or omitted means report on the selected window. */) |
5842a27b | 6161 | (Lisp_Object window) |
5d7791b3 | 6162 | { |
b9e9df47 | 6163 | return decode_any_window (window)->cursor_off_p ? Qnil : Qt; |
5d7791b3 | 6164 | } |
4588ec20 | 6165 | \f |
5f5c8ee5 GM |
6166 | /*********************************************************************** |
6167 | Initialization | |
6168 | ***********************************************************************/ | |
6169 | ||
dfcf069d | 6170 | void |
971de7fb | 6171 | syms_of_display (void) |
4588ec20 | 6172 | { |
502b9b64 | 6173 | defsubr (&Sredraw_frame); |
4588ec20 | 6174 | defsubr (&Sredraw_display); |
078b3696 | 6175 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
6176 | defsubr (&Sopen_termscript); |
6177 | defsubr (&Sding); | |
7ba07a1a | 6178 | defsubr (&Sredisplay); |
4588ec20 JB |
6179 | defsubr (&Ssleep_for); |
6180 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 6181 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 6182 | defsubr (&Sinternal_show_cursor_p); |
4588ec20 | 6183 | |
e509cfa6 | 6184 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
6185 | defsubr (&Sdump_redisplay_history); |
6186 | #endif | |
6187 | ||
d1dad759 | 6188 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
6189 | staticpro (&frame_and_buffer_state); |
6190 | ||
cd3520a4 JB |
6191 | DEFSYM (Qdisplay_table, "display-table"); |
6192 | DEFSYM (Qredisplay_dont_pause, "redisplay-dont-pause"); | |
9cda4f7c | 6193 | |
29208e82 | 6194 | DEFVAR_INT ("baud-rate", baud_rate, |
025de85b | 6195 | doc: /* The output baud rate of the terminal. |
228299fa GM |
6196 | On most systems, changing this value will affect the amount of padding |
6197 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 6198 | |
29208e82 | 6199 | DEFVAR_BOOL ("inverse-video", inverse_video, |
025de85b | 6200 | doc: /* Non-nil means invert the entire frame display. |
228299fa | 6201 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 6202 | |
29208e82 | 6203 | DEFVAR_BOOL ("visible-bell", visible_bell, |
025de85b | 6204 | doc: /* Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
6205 | |
6206 | See also `ring-bell-function'. */); | |
177c0ea7 | 6207 | |
29208e82 | 6208 | DEFVAR_BOOL ("no-redraw-on-reenter", no_redraw_on_reenter, |
025de85b | 6209 | doc: /* Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
6210 | A non-nil value is useful if the terminal can automatically preserve |
6211 | Emacs's frame display when you reenter Emacs. | |
6212 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 6213 | |
29208e82 | 6214 | DEFVAR_LISP ("initial-window-system", Vinitial_window_system, |
2246281f | 6215 | doc: /* Name of the window system that Emacs uses for the first frame. |
89baa1df EZ |
6216 | The value is a symbol: |
6217 | nil for a termcap frame (a character-only terminal), | |
6218 | 'x' for an Emacs frame that is really an X window, | |
6219 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6220 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6221 | 'pc' for a direct-write MS-DOS frame. | |
6222 | ||
6223 | Use of this variable as a boolean is deprecated. Instead, | |
6224 | use `display-graphic-p' or any of the other `display-*-p' | |
6225 | predicates which report frame's specific UI-related capabilities. */); | |
177c0ea7 | 6226 | |
70b8d0a4 SM |
6227 | DEFVAR_KBOARD ("window-system", Vwindow_system, |
6228 | doc: /* Name of window system through which the selected frame is displayed. | |
89baa1df EZ |
6229 | The value is a symbol: |
6230 | nil for a termcap frame (a character-only terminal), | |
6231 | 'x' for an Emacs frame that is really an X window, | |
6232 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6233 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6234 | 'pc' for a direct-write MS-DOS frame. | |
6235 | ||
6236 | Use of this variable as a boolean is deprecated. Instead, | |
6237 | use `display-graphic-p' or any of the other `display-*-p' | |
6238 | predicates which report frame's specific UI-related capabilities. */); | |
70b8d0a4 | 6239 | |
29208e82 | 6240 | DEFVAR_LISP ("window-system-version", Vwindow_system_version, |
bacf09b4 | 6241 | doc: /* The version number of the window system in use. |
c22140f6 | 6242 | For X windows, this is 11. */); |
177c0ea7 | 6243 | |
29208e82 | 6244 | DEFVAR_BOOL ("cursor-in-echo-area", cursor_in_echo_area, |
bacf09b4 | 6245 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 6246 | |
29208e82 | 6247 | DEFVAR_LISP ("glyph-table", Vglyph_table, |
bacf09b4 | 6248 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
6249 | If not nil, this is a vector indexed by glyph code to define the glyph. |
6250 | Each element can be: | |
6251 | integer: a glyph code which this glyph is an alias for. | |
6252 | string: output this glyph using that string (not impl. in X windows). | |
6253 | nil: this glyph mod 524288 is the code of a character to output, | |
6254 | and this glyph / 524288 is the face number (see `face-id') to use | |
6255 | while outputting it. */); | |
4588ec20 JB |
6256 | Vglyph_table = Qnil; |
6257 | ||
29208e82 | 6258 | DEFVAR_LISP ("standard-display-table", Vstandard_display_table, |
bacf09b4 | 6259 | doc: /* Display table to use for buffers that specify none. |
228299fa | 6260 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
6261 | Vstandard_display_table = Qnil; |
6262 | ||
29208e82 | 6263 | DEFVAR_BOOL ("redisplay-dont-pause", redisplay_dont_pause, |
025de85b | 6264 | doc: /* Non-nil means display update isn't paused when input is detected. */); |
6bf7006f | 6265 | redisplay_dont_pause = 1; |
5f5c8ee5 | 6266 | |
4588ec20 JB |
6267 | #ifdef CANNOT_DUMP |
6268 | if (noninteractive) | |
6269 | #endif | |
6270 | { | |
2246281f | 6271 | Vinitial_window_system = Qnil; |
4588ec20 JB |
6272 | Vwindow_system_version = Qnil; |
6273 | } | |
6274 | } |