Commit | Line | Data |
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4588ec20 | 1 | /* Updating of data structures for redisplay. |
9311dcff | 2 | |
ab422c4d PE |
3 | Copyright (C) 1985-1988, 1993-1995, 1997-2013 Free Software Foundation, |
4 | Inc. | |
4588ec20 JB |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
9ec0b715 | 8 | GNU Emacs is free software: you can redistribute it and/or modify |
4588ec20 | 9 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
10 | the Free Software Foundation, either version 3 of the License, or |
11 | (at your option) any later version. | |
4588ec20 JB |
12 | |
13 | GNU Emacs is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
4588ec20 | 20 | |
18160b98 | 21 | #include <config.h> |
f162bcc3 | 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" |
91f2d272 | 45 | #include "tparam.h" |
a41f8bed | 46 | |
17a2cbbd DC |
47 | #ifdef HAVE_WINDOW_SYSTEM |
48 | #include TERM_HEADER | |
49 | #endif /* HAVE_WINDOW_SYSTEM */ | |
edfda783 | 50 | |
3883a901 RS |
51 | #include <errno.h> |
52 | ||
8148369c | 53 | #include <fpending.h> |
43aac990 | 54 | #include <timespec.h> |
c59592b3 | 55 | |
a68089e4 EZ |
56 | #ifdef WINDOWSNT |
57 | #include "w32.h" | |
58 | #endif | |
5f5c8ee5 GM |
59 | \f |
60 | /* Structure to pass dimensions around. Used for character bounding | |
61 | boxes, glyph matrix dimensions and alike. */ | |
62 | ||
63 | struct dim | |
64 | { | |
65 | int width; | |
66 | int height; | |
67 | }; | |
68 | ||
69 | \f | |
70 | /* Function prototypes. */ | |
71 | ||
f57e2426 | 72 | static void update_frame_line (struct frame *, int); |
2f7c71a1 AS |
73 | static int required_matrix_height (struct window *); |
74 | static int required_matrix_width (struct window *); | |
59ea14cd | 75 | static void change_frame_size_1 (struct frame *, int, int, bool, bool, bool); |
d311d28c | 76 | static void increment_row_positions (struct glyph_row *, ptrdiff_t, ptrdiff_t); |
f57e2426 J |
77 | static void build_frame_matrix_from_window_tree (struct glyph_matrix *, |
78 | struct window *); | |
79 | static void build_frame_matrix_from_leaf_window (struct glyph_matrix *, | |
80 | struct window *); | |
f57e2426 J |
81 | static void adjust_decode_mode_spec_buffer (struct frame *); |
82 | static void fill_up_glyph_row_with_spaces (struct glyph_row *); | |
59ea14cd | 83 | static void clear_window_matrices (struct window *, bool); |
f57e2426 | 84 | static void fill_up_glyph_row_area_with_spaces (struct glyph_row *, int); |
59ea14cd PE |
85 | static int scrolling_window (struct window *, bool); |
86 | static bool update_window_line (struct window *, int, bool *); | |
f57e2426 | 87 | static void mirror_make_current (struct window *, int); |
e509cfa6 | 88 | #ifdef GLYPH_DEBUG |
f57e2426 J |
89 | static void check_matrix_pointers (struct glyph_matrix *, |
90 | struct glyph_matrix *); | |
b96fd3e8 | 91 | #endif |
f57e2426 | 92 | static void mirror_line_dance (struct window *, int, int, int *, char *); |
59ea14cd PE |
93 | static bool update_window_tree (struct window *, bool); |
94 | static bool update_window (struct window *, bool); | |
95 | static bool update_frame_1 (struct frame *, bool, bool); | |
96 | static bool scrolling (struct frame *); | |
f57e2426 | 97 | static void set_window_cursor_after_update (struct window *); |
f57e2426 J |
98 | static void adjust_frame_glyphs_for_window_redisplay (struct frame *); |
99 | static void adjust_frame_glyphs_for_frame_redisplay (struct frame *); | |
44ad1cf7 | 100 | static void set_window_update_flags (struct window *w, bool on_p); |
5f5c8ee5 | 101 | |
59ea14cd | 102 | /* True means last display completed. False means it was preempted. */ |
4588ec20 | 103 | |
59ea14cd | 104 | bool display_completed; |
4588ec20 | 105 | |
e7067d00 | 106 | Lisp_Object Qdisplay_table, Qredisplay_dont_pause; |
5f5c8ee5 | 107 | |
59ea14cd | 108 | /* True means SIGWINCH happened when not safe. */ |
4588ec20 | 109 | |
59ea14cd | 110 | static bool delayed_size_change; |
4588ec20 | 111 | |
5f5c8ee5 | 112 | /* A glyph for a space. */ |
4588ec20 | 113 | |
5f5c8ee5 | 114 | struct glyph space_glyph; |
4588ec20 | 115 | |
f0b79313 DA |
116 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
117 | ||
5f5c8ee5 GM |
118 | /* Counts of allocated structures. These counts serve to diagnose |
119 | memory leaks and double frees. */ | |
4588ec20 | 120 | |
5bf46f05 PE |
121 | static int glyph_matrix_count; |
122 | static int glyph_pool_count; | |
4588ec20 | 123 | |
f0b79313 DA |
124 | #endif /* GLYPH_DEBUG and ENABLE_CHECKING */ |
125 | ||
5f5c8ee5 GM |
126 | /* If non-null, the frame whose frame matrices are manipulated. If |
127 | null, window matrices are worked on. */ | |
4588ec20 | 128 | |
5f5c8ee5 | 129 | static struct frame *frame_matrix_frame; |
4588ec20 | 130 | |
177c0ea7 | 131 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 132 | This may only be used for terminal frames. */ |
836d2cde | 133 | |
e509cfa6 | 134 | #ifdef GLYPH_DEBUG |
4588ec20 | 135 | |
f57e2426 J |
136 | static int window_to_frame_vpos (struct window *, int); |
137 | static int window_to_frame_hpos (struct window *, int); | |
5f5c8ee5 GM |
138 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) |
139 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 140 | |
9b0e97aa GM |
141 | /* One element of the ring buffer containing redisplay history |
142 | information. */ | |
143 | ||
144 | struct redisplay_history | |
145 | { | |
146 | char trace[512 + 100]; | |
147 | }; | |
148 | ||
149 | /* The size of the history buffer. */ | |
150 | ||
151 | #define REDISPLAY_HISTORY_SIZE 30 | |
152 | ||
153 | /* The redisplay history buffer. */ | |
154 | ||
155 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
156 | ||
157 | /* Next free entry in redisplay_history. */ | |
158 | ||
159 | static int history_idx; | |
160 | ||
161 | /* A tick that's incremented each time something is added to the | |
162 | history. */ | |
163 | ||
dfd153ae | 164 | static uprintmax_t history_tick; |
6a8aec41 | 165 | \f |
9b0e97aa GM |
166 | /* Add to the redisplay history how window W has been displayed. |
167 | MSG is a trace containing the information how W's glyph matrix | |
59ea14cd | 168 | has been constructed. PAUSED_P means that the update |
9b0e97aa GM |
169 | has been interrupted for pending input. */ |
170 | ||
171 | static void | |
59ea14cd | 172 | add_window_display_history (struct window *w, const char *msg, bool paused_p) |
9b0e97aa GM |
173 | { |
174 | char *buf; | |
29abe551 | 175 | void *ptr = w; |
177c0ea7 | 176 | |
9b0e97aa GM |
177 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
178 | history_idx = 0; | |
179 | buf = redisplay_history[history_idx].trace; | |
180 | ++history_idx; | |
177c0ea7 | 181 | |
8666506e PE |
182 | snprintf (buf, sizeof redisplay_history[0].trace, |
183 | "%"pMu": window %p (`%s')%s\n%s", | |
184 | history_tick++, | |
29abe551 | 185 | ptr, |
e74aeda8 DA |
186 | ((BUFFERP (w->contents) |
187 | && STRINGP (BVAR (XBUFFER (w->contents), name))) | |
188 | ? SSDATA (BVAR (XBUFFER (w->contents), name)) | |
8666506e PE |
189 | : "???"), |
190 | paused_p ? " ***paused***" : "", | |
191 | msg); | |
9b0e97aa GM |
192 | } |
193 | ||
194 | ||
195 | /* Add to the redisplay history that frame F has been displayed. | |
59ea14cd | 196 | PAUSED_P means that the update has been interrupted for |
9b0e97aa GM |
197 | pending input. */ |
198 | ||
199 | static void | |
59ea14cd | 200 | add_frame_display_history (struct frame *f, bool paused_p) |
9b0e97aa GM |
201 | { |
202 | char *buf; | |
29abe551 | 203 | void *ptr = f; |
177c0ea7 | 204 | |
9b0e97aa GM |
205 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
206 | history_idx = 0; | |
207 | buf = redisplay_history[history_idx].trace; | |
208 | ++history_idx; | |
177c0ea7 | 209 | |
dfd153ae | 210 | sprintf (buf, "%"pMu": update frame %p%s", |
9b0e97aa | 211 | history_tick++, |
29abe551 | 212 | ptr, paused_p ? " ***paused***" : ""); |
9b0e97aa GM |
213 | } |
214 | ||
215 | ||
a7ca3326 | 216 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, |
9b0e97aa | 217 | Sdump_redisplay_history, 0, 0, "", |
7ee72033 | 218 | doc: /* Dump redisplay history to stderr. */) |
5842a27b | 219 | (void) |
9b0e97aa GM |
220 | { |
221 | int i; | |
222 | ||
223 | for (i = history_idx - 1; i != history_idx; --i) | |
224 | { | |
225 | if (i < 0) | |
226 | i = REDISPLAY_HISTORY_SIZE - 1; | |
227 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
228 | } | |
229 | ||
230 | return Qnil; | |
231 | } | |
232 | ||
233 | ||
e509cfa6 | 234 | #else /* not GLYPH_DEBUG */ |
4588ec20 | 235 | |
7df02016 KS |
236 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
237 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 238 | |
e509cfa6 | 239 | #endif /* GLYPH_DEBUG */ |
4588ec20 | 240 | |
4588ec20 | 241 | |
9e4bf381 PE |
242 | #if (defined PROFILING \ |
243 | && (defined __FreeBSD__ || defined GNU_LINUX || defined __MINGW32__) \ | |
244 | && !HAVE___EXECUTABLE_START) | |
245 | /* This function comes first in the Emacs executable and is used only | |
246 | to estimate the text start for profiling. */ | |
4588ec20 | 247 | void |
9e4bf381 | 248 | __executable_start (void) |
4588ec20 | 249 | { |
1088b922 | 250 | emacs_abort (); |
177c0ea7 | 251 | } |
72af86bd | 252 | #endif |
5f5c8ee5 GM |
253 | \f |
254 | /*********************************************************************** | |
255 | Glyph Matrices | |
256 | ***********************************************************************/ | |
257 | ||
258 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
259 | pool from which memory for the matrix should be allocated, or null | |
260 | for window-based redisplay where no glyph pools are used. The | |
261 | member `pool' of the glyph matrix structure returned is set to | |
262 | POOL, the structure is otherwise zeroed. */ | |
263 | ||
5bf46f05 | 264 | static struct glyph_matrix * |
971de7fb | 265 | new_glyph_matrix (struct glyph_pool *pool) |
4588ec20 | 266 | { |
23f86fce | 267 | struct glyph_matrix *result = xzalloc (sizeof *result); |
4588ec20 | 268 | |
f0b79313 | 269 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
5f5c8ee5 GM |
270 | /* Increment number of allocated matrices. This count is used |
271 | to detect memory leaks. */ | |
272 | ++glyph_matrix_count; | |
f0b79313 | 273 | #endif |
4588ec20 | 274 | |
5f5c8ee5 GM |
275 | /* Set pool and return. */ |
276 | result->pool = pool; | |
277 | return result; | |
4588ec20 JB |
278 | } |
279 | ||
4588ec20 | 280 | |
5f5c8ee5 GM |
281 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
282 | ||
f0b79313 DA |
283 | If GLYPH_DEBUG and ENABLE_CHECKING are in effect, the global counter |
284 | glyph_matrix_count is decremented when a matrix is freed. If the count | |
285 | gets negative, more structures were freed than allocated, i.e. one matrix | |
286 | was freed more than once or a bogus pointer was passed to this function. | |
177c0ea7 | 287 | |
5f5c8ee5 GM |
288 | If MATRIX->pool is null, this means that the matrix manages its own |
289 | glyph memory---this is done for matrices on X frames. Freeing the | |
290 | matrix also frees the glyph memory in this case. */ | |
291 | ||
292 | static void | |
971de7fb | 293 | free_glyph_matrix (struct glyph_matrix *matrix) |
4588ec20 | 294 | { |
5f5c8ee5 GM |
295 | if (matrix) |
296 | { | |
297 | int i; | |
298 | ||
f0b79313 | 299 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
5f5c8ee5 GM |
300 | /* Detect the case that more matrices are freed than were |
301 | allocated. */ | |
f0b79313 DA |
302 | --glyph_matrix_count; |
303 | eassert (glyph_matrix_count >= 0); | |
304 | #endif | |
5f5c8ee5 GM |
305 | |
306 | /* Free glyph memory if MATRIX owns it. */ | |
307 | if (matrix->pool == NULL) | |
308 | for (i = 0; i < matrix->rows_allocated; ++i) | |
309 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 310 | |
5f5c8ee5 GM |
311 | /* Free row structures and the matrix itself. */ |
312 | xfree (matrix->rows); | |
313 | xfree (matrix); | |
314 | } | |
315 | } | |
4588ec20 | 316 | |
4588ec20 | 317 | |
5f5c8ee5 GM |
318 | /* Return the number of glyphs to reserve for a marginal area of |
319 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
320 | display line of window W. MARGIN gives the width of the marginal | |
eeaf9bf3 | 321 | area in canonical character units. */ |
5f5c8ee5 GM |
322 | |
323 | static int | |
eeaf9bf3 | 324 | margin_glyphs_to_reserve (struct window *w, int total_glyphs, int margin) |
5f5c8ee5 | 325 | { |
eeaf9bf3 | 326 | if (margin > 0) |
4588ec20 | 327 | { |
5f24fa51 | 328 | int width = w->total_cols; |
eeaf9bf3 | 329 | double d = max (0, margin); |
5f5c8ee5 | 330 | d = min (width / 2 - 1, d); |
eeaf9bf3 | 331 | return (int) ((double) total_glyphs / width * d); |
5f5c8ee5 | 332 | } |
eeaf9bf3 | 333 | return 0; |
5f5c8ee5 GM |
334 | } |
335 | ||
59ea14cd | 336 | /* Return true if ROW's hash value is correct. |
e509cfa6 DA |
337 | Optimized away if ENABLE_CHECKING is not defined. */ |
338 | ||
59ea14cd | 339 | static bool |
7a7270dd EZ |
340 | verify_row_hash (struct glyph_row *row) |
341 | { | |
015137db | 342 | return row->hash == row_hash (row); |
7a7270dd | 343 | } |
4588ec20 | 344 | |
5f5c8ee5 GM |
345 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
346 | window sizes. | |
4588ec20 | 347 | |
5f5c8ee5 GM |
348 | W is null if the function is called for a frame glyph matrix. |
349 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
350 | indices of the first column and row of MATRIX within the frame | |
351 | matrix, if such a matrix exists. They are zero for purely | |
352 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 353 | |
5f5c8ee5 GM |
354 | In window-based redisplay, where no frame matrices exist, glyph |
355 | matrices manage their own glyph storage. Otherwise, they allocate | |
356 | storage from a common frame glyph pool which can be found in | |
357 | MATRIX->pool. | |
23b0200c | 358 | |
5f5c8ee5 GM |
359 | The reason for this memory management strategy is to avoid complete |
360 | frame redraws if possible. When we allocate from a common pool, a | |
361 | change of the location or size of a sub-matrix within the pool | |
362 | requires a complete redisplay of the frame because we cannot easily | |
363 | make sure that the current matrices of all windows still agree with | |
364 | what is displayed on the screen. While this is usually fast, it | |
365 | leads to screen flickering. */ | |
23b0200c | 366 | |
5f5c8ee5 | 367 | static void |
971de7fb | 368 | adjust_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int x, int y, struct dim dim) |
5f5c8ee5 GM |
369 | { |
370 | int i; | |
371 | int new_rows; | |
59ea14cd PE |
372 | bool marginal_areas_changed_p = 0; |
373 | bool header_line_changed_p = 0; | |
374 | bool header_line_p = 0; | |
5f5c8ee5 | 375 | int left = -1, right = -1; |
ca8a12a7 | 376 | int window_width = -1, window_height = -1; |
5f5c8ee5 | 377 | |
6b61353c KH |
378 | /* See if W had a header line that has disappeared now, or vice versa. |
379 | Get W's size. */ | |
5f5c8ee5 GM |
380 | if (w) |
381 | { | |
c3c4768d | 382 | window_box (w, ANY_AREA, 0, 0, &window_width, &window_height); |
6b61353c | 383 | |
045dee35 GM |
384 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
385 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 386 | } |
045dee35 | 387 | matrix->header_line_p = header_line_p; |
23b0200c | 388 | |
6b61353c KH |
389 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
390 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
391 | haven't changed. This optimization is important because preserving |
392 | the matrix means preventing redisplay. */ | |
393 | if (matrix->pool == NULL) | |
394 | { | |
d3d50620 DA |
395 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
396 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
a54e2c05 | 397 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
398 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs |
399 | || right != matrix->right_margin_glyphs); | |
400 | ||
401 | if (!marginal_areas_changed_p | |
bd0443bb | 402 | && !XFRAME (w->frame)->fonts_changed |
045dee35 | 403 | && !header_line_changed_p |
7df02016 KS |
404 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
405 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
406 | && matrix->window_height == window_height |
407 | && matrix->window_vscroll == w->vscroll | |
408 | && matrix->window_width == window_width) | |
409 | return; | |
410 | } | |
177c0ea7 | 411 | |
5f5c8ee5 GM |
412 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
413 | if (matrix->rows_allocated < dim.height) | |
414 | { | |
0065d054 | 415 | int old_alloc = matrix->rows_allocated; |
5f5c8ee5 | 416 | new_rows = dim.height - matrix->rows_allocated; |
0065d054 PE |
417 | matrix->rows = xpalloc (matrix->rows, &matrix->rows_allocated, |
418 | new_rows, INT_MAX, sizeof *matrix->rows); | |
419 | memset (matrix->rows + old_alloc, 0, | |
420 | (matrix->rows_allocated - old_alloc) * sizeof *matrix->rows); | |
5f5c8ee5 GM |
421 | } |
422 | else | |
423 | new_rows = 0; | |
60a8948a | 424 | |
5f5c8ee5 GM |
425 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
426 | on a frame not using window-based redisplay. Set up pointers for | |
427 | each row into the glyph pool. */ | |
428 | if (matrix->pool) | |
429 | { | |
a54e2c05 | 430 | eassert (matrix->pool->glyphs); |
177c0ea7 | 431 | |
5f5c8ee5 | 432 | if (w) |
60a8948a | 433 | { |
5f5c8ee5 | 434 | left = margin_glyphs_to_reserve (w, dim.width, |
d3d50620 | 435 | w->left_margin_cols); |
5f5c8ee5 | 436 | right = margin_glyphs_to_reserve (w, dim.width, |
d3d50620 | 437 | w->right_margin_cols); |
60a8948a | 438 | } |
5f5c8ee5 GM |
439 | else |
440 | left = right = 0; | |
177c0ea7 | 441 | |
5f5c8ee5 | 442 | for (i = 0; i < dim.height; ++i) |
60a8948a | 443 | { |
5f5c8ee5 | 444 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
445 | |
446 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
447 | = (matrix->pool->glyphs |
448 | + (y + i) * matrix->pool->ncolumns | |
449 | + x); | |
177c0ea7 | 450 | |
5f5c8ee5 GM |
451 | if (w == NULL |
452 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 453 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
454 | { |
455 | row->glyphs[TEXT_AREA] | |
456 | = row->glyphs[LEFT_MARGIN_AREA]; | |
457 | row->glyphs[RIGHT_MARGIN_AREA] | |
458 | = row->glyphs[TEXT_AREA] + dim.width; | |
459 | row->glyphs[LAST_AREA] | |
460 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
461 | } | |
462 | else | |
463 | { | |
464 | row->glyphs[TEXT_AREA] | |
465 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
466 | row->glyphs[RIGHT_MARGIN_AREA] | |
467 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
468 | row->glyphs[LAST_AREA] | |
469 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
470 | } | |
60a8948a | 471 | } |
177c0ea7 | 472 | |
5f5c8ee5 GM |
473 | matrix->left_margin_glyphs = left; |
474 | matrix->right_margin_glyphs = right; | |
475 | } | |
476 | else | |
477 | { | |
478 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
6b61353c KH |
479 | its own memory. It is a window matrix for window-based redisplay. |
480 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
481 | if (dim.width > matrix->matrix_w |
482 | || new_rows | |
045dee35 | 483 | || header_line_changed_p |
5f5c8ee5 | 484 | || marginal_areas_changed_p) |
4588ec20 | 485 | { |
5f5c8ee5 GM |
486 | struct glyph_row *row = matrix->rows; |
487 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 488 | |
5f5c8ee5 GM |
489 | while (row < end) |
490 | { | |
491 | row->glyphs[LEFT_MARGIN_AREA] | |
0065d054 PE |
492 | = xnrealloc (row->glyphs[LEFT_MARGIN_AREA], |
493 | dim.width, sizeof (struct glyph)); | |
177c0ea7 | 494 | |
5f5c8ee5 GM |
495 | /* The mode line never has marginal areas. */ |
496 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 497 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
498 | { |
499 | row->glyphs[TEXT_AREA] | |
500 | = row->glyphs[LEFT_MARGIN_AREA]; | |
501 | row->glyphs[RIGHT_MARGIN_AREA] | |
502 | = row->glyphs[TEXT_AREA] + dim.width; | |
503 | row->glyphs[LAST_AREA] | |
504 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
505 | } | |
506 | else | |
507 | { | |
508 | row->glyphs[TEXT_AREA] | |
509 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
510 | row->glyphs[RIGHT_MARGIN_AREA] | |
511 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
512 | row->glyphs[LAST_AREA] | |
513 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
514 | } | |
515 | ++row; | |
516 | } | |
4588ec20 JB |
517 | } |
518 | ||
a54e2c05 | 519 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
520 | matrix->left_margin_glyphs = left; |
521 | matrix->right_margin_glyphs = right; | |
522 | } | |
177c0ea7 | 523 | |
5f5c8ee5 GM |
524 | /* Number of rows to be used by MATRIX. */ |
525 | matrix->nrows = dim.height; | |
a54e2c05 | 526 | eassert (matrix->nrows >= 0); |
5f5c8ee5 | 527 | |
b7b20fbd | 528 | if (w) |
5f5c8ee5 | 529 | { |
b7b20fbd | 530 | if (matrix == w->current_matrix) |
4588ec20 | 531 | { |
b7b20fbd GM |
532 | /* Mark rows in a current matrix of a window as not having |
533 | valid contents. It's important to not do this for | |
534 | desired matrices. When Emacs starts, it may already be | |
535 | building desired matrices when this function runs. */ | |
536 | if (window_width < 0) | |
537 | window_width = window_box_width (w, -1); | |
177c0ea7 | 538 | |
b7b20fbd GM |
539 | /* Optimize the case that only the height has changed (C-x 2, |
540 | upper window). Invalidate all rows that are no longer part | |
541 | of the window. */ | |
542 | if (!marginal_areas_changed_p | |
73d75a62 GM |
543 | && !header_line_changed_p |
544 | && new_rows == 0 | |
545 | && dim.width == matrix->matrix_w | |
7df02016 KS |
546 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
547 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 548 | && matrix->window_width == window_width) |
b7b20fbd | 549 | { |
dd42b31a GM |
550 | /* Find the last row in the window. */ |
551 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
552 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
553 | { | |
26447967 | 554 | ++i; |
dd42b31a GM |
555 | break; |
556 | } | |
b7b20fbd GM |
557 | |
558 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 559 | are invalidated below. */ |
02455cb6 | 560 | if (w->window_end_vpos >= i) |
9d93ce29 | 561 | w->window_end_valid = 0; |
177c0ea7 | 562 | |
b7b20fbd GM |
563 | while (i < matrix->nrows) |
564 | matrix->rows[i++].enabled_p = 0; | |
565 | } | |
566 | else | |
567 | { | |
568 | for (i = 0; i < matrix->nrows; ++i) | |
569 | matrix->rows[i].enabled_p = 0; | |
570 | } | |
5f5c8ee5 | 571 | } |
b7b20fbd | 572 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 573 | { |
b7b20fbd GM |
574 | /* Rows in desired matrices always have to be cleared; |
575 | redisplay expects this is the case when it runs, so it | |
576 | had better be the case when we adjust matrices between | |
577 | redisplays. */ | |
5f5c8ee5 GM |
578 | for (i = 0; i < matrix->nrows; ++i) |
579 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 580 | } |
4588ec20 | 581 | } |
177c0ea7 JB |
582 | |
583 | ||
5f5c8ee5 GM |
584 | /* Remember last values to be able to optimize frame redraws. */ |
585 | matrix->matrix_x = x; | |
586 | matrix->matrix_y = y; | |
587 | matrix->matrix_w = dim.width; | |
588 | matrix->matrix_h = dim.height; | |
589 | ||
590 | /* Record the top y location and height of W at the time the matrix | |
591 | was last adjusted. This is used to optimize redisplay above. */ | |
592 | if (w) | |
4588ec20 | 593 | { |
7df02016 KS |
594 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
595 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
596 | matrix->window_height = window_height; |
597 | matrix->window_width = window_width; | |
598 | matrix->window_vscroll = w->vscroll; | |
599 | } | |
600 | } | |
4588ec20 | 601 | |
4588ec20 | 602 | |
5f5c8ee5 GM |
603 | /* Reverse the contents of rows in MATRIX between START and END. The |
604 | contents of the row at END - 1 end up at START, END - 2 at START + | |
605 | 1 etc. This is part of the implementation of rotate_matrix (see | |
606 | below). */ | |
d52bad65 | 607 | |
5f5c8ee5 | 608 | static void |
971de7fb | 609 | reverse_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 GM |
610 | { |
611 | int i, j; | |
23b0200c | 612 | |
5f5c8ee5 GM |
613 | for (i = start, j = end - 1; i < j; ++i, --j) |
614 | { | |
615 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
616 | initialization. */ | |
617 | struct glyph_row temp; | |
618 | temp = matrix->rows[i]; | |
619 | matrix->rows[i] = matrix->rows[j]; | |
620 | matrix->rows[j] = temp; | |
621 | } | |
622 | } | |
23b0200c | 623 | |
23b0200c | 624 | |
5f5c8ee5 GM |
625 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
626 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
627 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
628 | row structures are moved around). | |
60a8948a | 629 | |
5f5c8ee5 GM |
630 | The algorithm used for rotating the vector was, I believe, first |
631 | described by Kernighan. See the vector R as consisting of two | |
632 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
633 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
634 | and reverse the result to get (ArBr)r which is BA. Similar for | |
635 | rotating right. */ | |
636 | ||
637 | void | |
971de7fb | 638 | rotate_matrix (struct glyph_matrix *matrix, int first, int last, int by) |
5f5c8ee5 GM |
639 | { |
640 | if (by < 0) | |
641 | { | |
642 | /* Up (rotate left, i.e. towards lower indices). */ | |
643 | by = -by; | |
644 | reverse_rows (matrix, first, first + by); | |
645 | reverse_rows (matrix, first + by, last); | |
646 | reverse_rows (matrix, first, last); | |
647 | } | |
648 | else if (by > 0) | |
649 | { | |
650 | /* Down (rotate right, i.e. towards higher indices). */ | |
651 | reverse_rows (matrix, last - by, last); | |
652 | reverse_rows (matrix, first, last - by); | |
653 | reverse_rows (matrix, first, last); | |
654 | } | |
655 | } | |
656 | ||
657 | ||
658 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
659 | with indices START <= index < END. Increment positions by DELTA/ | |
660 | DELTA_BYTES. */ | |
661 | ||
662 | void | |
ace1712c | 663 | increment_matrix_positions (struct glyph_matrix *matrix, int start, int end, |
d311d28c | 664 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
665 | { |
666 | /* Check that START and END are reasonable values. */ | |
a54e2c05 DA |
667 | eassert (start >= 0 && start <= matrix->nrows); |
668 | eassert (end >= 0 && end <= matrix->nrows); | |
669 | eassert (start <= end); | |
5f5c8ee5 GM |
670 | |
671 | for (; start < end; ++start) | |
86c11ba1 | 672 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
673 | } |
674 | ||
675 | ||
59ea14cd PE |
676 | /* Clear the enable_p flags in a range of rows in glyph matrix MATRIX. |
677 | START and END are the row indices of the first and last + 1 row to clear. */ | |
5f5c8ee5 GM |
678 | |
679 | void | |
59ea14cd | 680 | clear_glyph_matrix_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 | 681 | { |
a54e2c05 DA |
682 | eassert (start <= end); |
683 | eassert (start >= 0 && start < matrix->nrows); | |
684 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 685 | |
5f5c8ee5 | 686 | for (; start < end; ++start) |
59ea14cd | 687 | matrix->rows[start].enabled_p = 0; |
5f5c8ee5 GM |
688 | } |
689 | ||
690 | ||
691 | /* Clear MATRIX. | |
692 | ||
59ea14cd PE |
693 | Empty all rows in MATRIX by clearing their enabled_p flags. |
694 | The function prepare_desired_row will eventually really clear a row | |
695 | when it sees one with a false enabled_p flag. | |
5f5c8ee5 | 696 | |
59ea14cd | 697 | Reset update hints to default values. The only update hint |
5f5c8ee5 GM |
698 | currently present is the flag MATRIX->no_scrolling_p. */ |
699 | ||
700 | void | |
971de7fb | 701 | clear_glyph_matrix (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
702 | { |
703 | if (matrix) | |
704 | { | |
59ea14cd | 705 | clear_glyph_matrix_rows (matrix, 0, matrix->nrows); |
5f5c8ee5 GM |
706 | matrix->no_scrolling_p = 0; |
707 | } | |
708 | } | |
177c0ea7 | 709 | |
5f5c8ee5 GM |
710 | |
711 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
712 | Increment y-positions in glyph rows between START and END by DY, | |
713 | and recompute their visible height. */ | |
714 | ||
715 | void | |
971de7fb | 716 | shift_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int start, int end, int dy) |
5f5c8ee5 GM |
717 | { |
718 | int min_y, max_y; | |
177c0ea7 | 719 | |
a54e2c05 DA |
720 | eassert (start <= end); |
721 | eassert (start >= 0 && start < matrix->nrows); | |
722 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 723 | |
7df02016 KS |
724 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
725 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 726 | |
5f5c8ee5 GM |
727 | for (; start < end; ++start) |
728 | { | |
729 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 730 | |
5f5c8ee5 | 731 | row->y += dy; |
d6c747a4 | 732 | row->visible_height = row->height; |
177c0ea7 | 733 | |
5f5c8ee5 | 734 | if (row->y < min_y) |
d6c747a4 GM |
735 | row->visible_height -= min_y - row->y; |
736 | if (row->y + row->height > max_y) | |
737 | row->visible_height -= row->y + row->height - max_y; | |
e61124cd YM |
738 | if (row->fringe_bitmap_periodic_p) |
739 | row->redraw_fringe_bitmaps_p = 1; | |
5f5c8ee5 GM |
740 | } |
741 | } | |
742 | ||
743 | ||
744 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
745 | invalid is done by setting enabled_p to zero for all rows in a | |
746 | current matrix. */ | |
747 | ||
748 | void | |
971de7fb | 749 | clear_current_matrices (register struct frame *f) |
5f5c8ee5 GM |
750 | { |
751 | /* Clear frame current matrix, if we have one. */ | |
752 | if (f->current_matrix) | |
753 | clear_glyph_matrix (f->current_matrix); | |
754 | ||
5a49b79c | 755 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
756 | /* Clear the matrix of the menu bar window, if such a window exists. |
757 | The menu bar window is currently used to display menus on X when | |
758 | no toolkit support is compiled in. */ | |
e69b0960 DA |
759 | if (WINDOWP (f->menu_bar_window)) |
760 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
5a49b79c | 761 | #endif |
5f5c8ee5 | 762 | |
742516e0 | 763 | #if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS) |
9ea173e8 | 764 | /* Clear the matrix of the tool-bar window, if any. */ |
e69b0960 DA |
765 | if (WINDOWP (f->tool_bar_window)) |
766 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
742516e0 | 767 | #endif |
5f5c8ee5 GM |
768 | |
769 | /* Clear current window matrices. */ | |
a54e2c05 | 770 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
771 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); |
772 | } | |
773 | ||
774 | ||
775 | /* Clear out all display lines of F for a coming redisplay. */ | |
776 | ||
777 | void | |
971de7fb | 778 | clear_desired_matrices (register struct frame *f) |
5f5c8ee5 GM |
779 | { |
780 | if (f->desired_matrix) | |
781 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 782 | |
5a49b79c | 783 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
e69b0960 DA |
784 | if (WINDOWP (f->menu_bar_window)) |
785 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
5a49b79c | 786 | #endif |
5f5c8ee5 | 787 | |
742516e0 | 788 | #if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS) |
e69b0960 DA |
789 | if (WINDOWP (f->tool_bar_window)) |
790 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
742516e0 | 791 | #endif |
5f5c8ee5 GM |
792 | |
793 | /* Do it for window matrices. */ | |
a54e2c05 | 794 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
795 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); |
796 | } | |
797 | ||
798 | ||
59ea14cd PE |
799 | /* Clear matrices in window tree rooted in W. If DESIRED_P, |
800 | clear desired matrices, otherwise clear current matrices. */ | |
5f5c8ee5 GM |
801 | |
802 | static void | |
59ea14cd | 803 | clear_window_matrices (struct window *w, bool desired_p) |
5f5c8ee5 GM |
804 | { |
805 | while (w) | |
806 | { | |
e74aeda8 DA |
807 | if (WINDOWP (w->contents)) |
808 | clear_window_matrices (XWINDOW (w->contents), desired_p); | |
5f5c8ee5 GM |
809 | else |
810 | { | |
811 | if (desired_p) | |
812 | clear_glyph_matrix (w->desired_matrix); | |
813 | else | |
814 | { | |
815 | clear_glyph_matrix (w->current_matrix); | |
9d93ce29 | 816 | w->window_end_valid = 0; |
5f5c8ee5 GM |
817 | } |
818 | } | |
819 | ||
d3d50620 | 820 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
821 | } |
822 | } | |
823 | ||
824 | ||
825 | \f | |
826 | /*********************************************************************** | |
827 | Glyph Rows | |
828 | ||
829 | See dispextern.h for an overall explanation of glyph rows. | |
830 | ***********************************************************************/ | |
831 | ||
ec7bc82f DA |
832 | /* Clear glyph row ROW. NOTE: this code relies on the current |
833 | layout of `glyphs' and `used' fields of `struct glyph_row'. */ | |
2cca872d | 834 | |
5f5c8ee5 | 835 | void |
971de7fb | 836 | clear_glyph_row (struct glyph_row *row) |
5f5c8ee5 | 837 | { |
cf647d93 | 838 | enum { off = offsetof (struct glyph_row, used) }; |
ec7bc82f | 839 | |
ec7bc82f | 840 | /* Zero everything except pointers in `glyphs'. */ |
9da0f50e | 841 | memset (row->used, 0, sizeof *row - off); |
5f5c8ee5 GM |
842 | } |
843 | ||
844 | ||
845 | /* Make ROW an empty, enabled row of canonical character height, | |
846 | in window W starting at y-position Y. */ | |
847 | ||
848 | void | |
971de7fb | 849 | blank_row (struct window *w, struct glyph_row *row, int y) |
5f5c8ee5 GM |
850 | { |
851 | int min_y, max_y; | |
177c0ea7 | 852 | |
7df02016 KS |
853 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
854 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 855 | |
5f5c8ee5 GM |
856 | clear_glyph_row (row); |
857 | row->y = y; | |
408f5064 | 858 | row->ascent = row->phys_ascent = 0; |
d3d50620 | 859 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 860 | row->visible_height = row->height; |
177c0ea7 | 861 | |
5f5c8ee5 | 862 | if (row->y < min_y) |
d6c747a4 GM |
863 | row->visible_height -= min_y - row->y; |
864 | if (row->y + row->height > max_y) | |
865 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
866 | |
867 | row->enabled_p = 1; | |
868 | } | |
869 | ||
870 | ||
871 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
872 | are the amounts by which to change positions. Note that the first | |
873 | glyph of the text area of a row can have a buffer position even if | |
874 | the used count of the text area is zero. Such rows display line | |
875 | ends. */ | |
876 | ||
5bf46f05 | 877 | static void |
ace1712c | 878 | increment_row_positions (struct glyph_row *row, |
d311d28c | 879 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
880 | { |
881 | int area, i; | |
882 | ||
883 | /* Increment start and end positions. */ | |
884 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
885 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
886 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
887 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
d36fe237 EZ |
888 | CHARPOS (row->start.pos) += delta; |
889 | BYTEPOS (row->start.pos) += delta_bytes; | |
890 | CHARPOS (row->end.pos) += delta; | |
891 | BYTEPOS (row->end.pos) += delta_bytes; | |
5f5c8ee5 | 892 | |
5cacdcfd KS |
893 | if (!row->enabled_p) |
894 | return; | |
895 | ||
5f5c8ee5 GM |
896 | /* Increment positions in glyphs. */ |
897 | for (area = 0; area < LAST_AREA; ++area) | |
898 | for (i = 0; i < row->used[area]; ++i) | |
899 | if (BUFFERP (row->glyphs[area][i].object) | |
900 | && row->glyphs[area][i].charpos > 0) | |
901 | row->glyphs[area][i].charpos += delta; | |
902 | ||
903 | /* Capture the case of rows displaying a line end. */ | |
904 | if (row->used[TEXT_AREA] == 0 | |
905 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
906 | row->glyphs[TEXT_AREA]->charpos += delta; | |
907 | } | |
908 | ||
909 | ||
9af3e742 | 910 | #if 0 |
5f5c8ee5 GM |
911 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
912 | contents, i.e. glyph structure contents are exchanged between A and | |
913 | B without changing glyph pointers in A and B. */ | |
914 | ||
915 | static void | |
1dae0f0a | 916 | swap_glyphs_in_rows (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
917 | { |
918 | int area; | |
919 | ||
920 | for (area = 0; area < LAST_AREA; ++area) | |
921 | { | |
922 | /* Number of glyphs to swap. */ | |
923 | int max_used = max (a->used[area], b->used[area]); | |
924 | ||
925 | /* Start of glyphs in area of row A. */ | |
926 | struct glyph *glyph_a = a->glyphs[area]; | |
927 | ||
928 | /* End + 1 of glyphs in area of row A. */ | |
929 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
930 | ||
931 | /* Start of glyphs in area of row B. */ | |
932 | struct glyph *glyph_b = b->glyphs[area]; | |
933 | ||
934 | while (glyph_a < glyph_a_end) | |
935 | { | |
936 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
937 | initialization. */ | |
938 | struct glyph temp; | |
939 | temp = *glyph_a; | |
940 | *glyph_a = *glyph_b; | |
941 | *glyph_b = temp; | |
942 | ++glyph_a; | |
943 | ++glyph_b; | |
944 | } | |
945 | } | |
946 | } | |
947 | ||
9af3e742 | 948 | #endif /* 0 */ |
5f5c8ee5 | 949 | |
015137db EZ |
950 | /* Exchange pointers to glyph memory between glyph rows A and B. Also |
951 | exchange the used[] array and the hash values of the rows, because | |
952 | these should all go together for the row's hash value to be | |
953 | correct. */ | |
5f5c8ee5 | 954 | |
b0ab8123 | 955 | static void |
971de7fb | 956 | swap_glyph_pointers (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
957 | { |
958 | int i; | |
015137db EZ |
959 | unsigned hash_tem = a->hash; |
960 | ||
5f5c8ee5 GM |
961 | for (i = 0; i < LAST_AREA + 1; ++i) |
962 | { | |
963 | struct glyph *temp = a->glyphs[i]; | |
015137db | 964 | |
5f5c8ee5 GM |
965 | a->glyphs[i] = b->glyphs[i]; |
966 | b->glyphs[i] = temp; | |
73055685 EZ |
967 | if (i < LAST_AREA) |
968 | { | |
969 | short used_tem = a->used[i]; | |
970 | ||
971 | a->used[i] = b->used[i]; | |
972 | b->used[i] = used_tem; | |
973 | } | |
5f5c8ee5 | 974 | } |
015137db EZ |
975 | a->hash = b->hash; |
976 | b->hash = hash_tem; | |
5f5c8ee5 GM |
977 | } |
978 | ||
979 | ||
ec7bc82f DA |
980 | /* Copy glyph row structure FROM to glyph row structure TO, except that |
981 | glyph pointers, the `used' counts, and the hash values in the structures | |
982 | are left unchanged. NOTE: this code relies on the current layout of | |
983 | `glyphs', `used', `hash' and `x' fields of `struct glyph_row'. */ | |
5f5c8ee5 | 984 | |
b0ab8123 | 985 | static void |
971de7fb | 986 | copy_row_except_pointers (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 | 987 | { |
cf647d93 | 988 | enum { off = offsetof (struct glyph_row, x) }; |
ec7bc82f | 989 | |
9da0f50e | 990 | memcpy (&to->x, &from->x, sizeof *to - off); |
5f5c8ee5 GM |
991 | } |
992 | ||
993 | ||
5f5c8ee5 GM |
994 | /* Assign glyph row FROM to glyph row TO. This works like a structure |
995 | assignment TO = FROM, except that glyph pointers are not copied but | |
996 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
997 | a memory leak. */ | |
998 | ||
b0ab8123 | 999 | static void |
971de7fb | 1000 | assign_row (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1001 | { |
1002 | swap_glyph_pointers (to, from); | |
1003 | copy_row_except_pointers (to, from); | |
1004 | } | |
1005 | ||
1006 | ||
1007 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1008 | a row in a window matrix, is a slice of the glyph memory of the | |
1009 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
59ea14cd | 1010 | is true if the glyph memory of WINDOW_ROW is part of the glyph |
5f5c8ee5 GM |
1011 | memory of FRAME_ROW. */ |
1012 | ||
e509cfa6 | 1013 | #ifdef GLYPH_DEBUG |
9339e87f | 1014 | |
59ea14cd | 1015 | static bool |
59fc5cf9 | 1016 | glyph_row_slice_p (struct glyph_row *window_row, struct glyph_row *frame_row) |
5f5c8ee5 GM |
1017 | { |
1018 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1019 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1020 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1021 | ||
1022 | return (frame_glyph_start <= window_glyph_start | |
1023 | && window_glyph_start < frame_glyph_end); | |
1024 | } | |
1025 | ||
9339e87f | 1026 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1027 | |
9af3e742 GM |
1028 | #if 0 |
1029 | ||
5f5c8ee5 GM |
1030 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1031 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1032 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1033 | ||
1034 | static struct glyph_row * | |
59fc5cf9 AS |
1035 | find_glyph_row_slice (struct glyph_matrix *window_matrix, |
1036 | struct glyph_matrix *frame_matrix, int row) | |
5f5c8ee5 GM |
1037 | { |
1038 | int i; | |
1039 | ||
a54e2c05 | 1040 | eassert (row >= 0 && row < frame_matrix->nrows); |
5f5c8ee5 GM |
1041 | |
1042 | for (i = 0; i < window_matrix->nrows; ++i) | |
1043 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1044 | frame_matrix->rows + row)) | |
1045 | break; | |
1046 | ||
1047 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1048 | } | |
1049 | ||
9af3e742 | 1050 | #endif /* 0 */ |
5f5c8ee5 GM |
1051 | |
1052 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1053 | i.e. they are only marked as to be cleared by setting their | |
1054 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1055 | call to this function really clears it. */ | |
1056 | ||
1057 | void | |
971de7fb | 1058 | prepare_desired_row (struct glyph_row *row) |
5f5c8ee5 GM |
1059 | { |
1060 | if (!row->enabled_p) | |
1061 | { | |
59ea14cd | 1062 | bool rp = row->reversed_p; |
5009f85e | 1063 | |
5f5c8ee5 GM |
1064 | clear_glyph_row (row); |
1065 | row->enabled_p = 1; | |
5009f85e | 1066 | row->reversed_p = rp; |
5f5c8ee5 GM |
1067 | } |
1068 | } | |
1069 | ||
1070 | ||
77e3b1b7 DA |
1071 | /* Return a hash code for glyph row ROW, which may |
1072 | be from current or desired matrix of frame F. */ | |
5f5c8ee5 | 1073 | |
2f7c71a1 | 1074 | static int |
77e3b1b7 | 1075 | line_hash_code (struct frame *f, struct glyph_row *row) |
5f5c8ee5 GM |
1076 | { |
1077 | int hash = 0; | |
177c0ea7 | 1078 | |
5f5c8ee5 GM |
1079 | if (row->enabled_p) |
1080 | { | |
4cecaab8 MB |
1081 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1082 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1083 | ||
1084 | while (glyph < end) | |
1085 | { | |
1086 | int c = glyph->u.ch; | |
1087 | int face_id = glyph->face_id; | |
77e3b1b7 | 1088 | if (FRAME_MUST_WRITE_SPACES (f)) |
4cecaab8 MB |
1089 | c -= SPACEGLYPH; |
1090 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1091 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1092 | ++glyph; | |
1093 | } | |
5f5c8ee5 | 1094 | |
4cecaab8 MB |
1095 | if (hash == 0) |
1096 | hash = 1; | |
5f5c8ee5 GM |
1097 | } |
1098 | ||
1099 | return hash; | |
1100 | } | |
1101 | ||
1102 | ||
77e3b1b7 DA |
1103 | /* Return the cost of drawing line VPOS in MATRIX, which may |
1104 | be current or desired matrix of frame F. The cost equals | |
1105 | the number of characters in the line. If must_write_spaces | |
1106 | is zero, leading and trailing spaces are ignored. */ | |
5f5c8ee5 | 1107 | |
dfd153ae | 1108 | static int |
77e3b1b7 | 1109 | line_draw_cost (struct frame *f, struct glyph_matrix *matrix, int vpos) |
5f5c8ee5 GM |
1110 | { |
1111 | struct glyph_row *row = matrix->rows + vpos; | |
1112 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1113 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1114 | int len; | |
1115 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
ca9ce8f2 | 1116 | ptrdiff_t glyph_table_len = GLYPH_TABLE_LENGTH; |
5f5c8ee5 GM |
1117 | |
1118 | /* Ignore trailing and leading spaces if we can. */ | |
77e3b1b7 | 1119 | if (!FRAME_MUST_WRITE_SPACES (f)) |
5f5c8ee5 GM |
1120 | { |
1121 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1122 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1123 | --end; |
1124 | ||
177c0ea7 | 1125 | /* All blank line. */ |
5f5c8ee5 GM |
1126 | if (end == beg) |
1127 | return 0; | |
1128 | ||
1129 | /* Skip over leading spaces. */ | |
1130 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1131 | ++beg; | |
1132 | } | |
1133 | ||
1134 | /* If we don't have a glyph-table, each glyph is one character, | |
1135 | so return the number of glyphs. */ | |
1136 | if (glyph_table_base == 0) | |
1137 | len = end - beg; | |
1138 | else | |
1139 | { | |
1140 | /* Otherwise, scan the glyphs and accumulate their total length | |
1141 | in LEN. */ | |
1142 | len = 0; | |
1143 | while (beg < end) | |
1144 | { | |
3fc809e2 | 1145 | GLYPH g; |
177c0ea7 | 1146 | |
3fc809e2 KS |
1147 | SET_GLYPH_FROM_CHAR_GLYPH (g, *beg); |
1148 | ||
565b39a8 | 1149 | if (GLYPH_INVALID_P (g) |
42186983 | 1150 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) |
5f5c8ee5 GM |
1151 | len += 1; |
1152 | else | |
1153 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1154 | |
5f5c8ee5 GM |
1155 | ++beg; |
1156 | } | |
1157 | } | |
177c0ea7 | 1158 | |
5f5c8ee5 GM |
1159 | return len; |
1160 | } | |
1161 | ||
1162 | ||
59ea14cd PE |
1163 | /* Return true if the glyph rows A and B have equal contents. |
1164 | MOUSE_FACE_P means compare the mouse_face_p flags of A and B, too. */ | |
5f5c8ee5 | 1165 | |
b0ab8123 | 1166 | static bool |
59ea14cd | 1167 | row_equal_p (struct glyph_row *a, struct glyph_row *b, bool mouse_face_p) |
5f5c8ee5 | 1168 | { |
a54e2c05 DA |
1169 | eassert (verify_row_hash (a)); |
1170 | eassert (verify_row_hash (b)); | |
7a7270dd | 1171 | |
5f5c8ee5 GM |
1172 | if (a == b) |
1173 | return 1; | |
1174 | else if (a->hash != b->hash) | |
1175 | return 0; | |
1176 | else | |
1177 | { | |
1178 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1179 | int area; | |
1180 | ||
e4e0bee9 GM |
1181 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1182 | return 0; | |
1183 | ||
5f5c8ee5 GM |
1184 | /* Compare glyphs. */ |
1185 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1186 | { | |
1187 | if (a->used[area] != b->used[area]) | |
1188 | return 0; | |
177c0ea7 | 1189 | |
5f5c8ee5 GM |
1190 | a_glyph = a->glyphs[area]; |
1191 | a_end = a_glyph + a->used[area]; | |
1192 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1193 | |
5f5c8ee5 GM |
1194 | while (a_glyph < a_end |
1195 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1196 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1197 | |
5f5c8ee5 GM |
1198 | if (a_glyph != a_end) |
1199 | return 0; | |
1200 | } | |
1201 | ||
6b61353c KH |
1202 | if (a->fill_line_p != b->fill_line_p |
1203 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1204 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
1205 | || a->left_fringe_face_id != b->left_fringe_face_id | |
e61124cd | 1206 | || a->left_fringe_offset != b->left_fringe_offset |
6b61353c KH |
1207 | || a->right_fringe_bitmap != b->right_fringe_bitmap |
1208 | || a->right_fringe_face_id != b->right_fringe_face_id | |
e61124cd YM |
1209 | || a->right_fringe_offset != b->right_fringe_offset |
1210 | || a->fringe_bitmap_periodic_p != b->fringe_bitmap_periodic_p | |
3d4a365f | 1211 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
6b61353c | 1212 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1213 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1214 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1215 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
918f4159 | 1216 | || a->reversed_p != b->reversed_p |
5f5c8ee5 GM |
1217 | /* Different partially visible characters on left margin. */ |
1218 | || a->x != b->x | |
1219 | /* Different height. */ | |
1220 | || a->ascent != b->ascent | |
408f5064 GM |
1221 | || a->phys_ascent != b->phys_ascent |
1222 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1223 | || a->visible_height != b->visible_height) |
1224 | return 0; | |
1225 | } | |
1226 | ||
1227 | return 1; | |
1228 | } | |
1229 | ||
1230 | ||
1231 | \f | |
1232 | /*********************************************************************** | |
1233 | Glyph Pool | |
1234 | ||
1235 | See dispextern.h for an overall explanation of glyph pools. | |
1236 | ***********************************************************************/ | |
1237 | ||
f0b79313 DA |
1238 | /* Allocate a glyph_pool structure. The structure returned is initialized |
1239 | with zeros. If GLYPH_DEBUG and ENABLE_CHECKING are in effect, the global | |
1240 | variable glyph_pool_count is incremented for each pool allocated. */ | |
5f5c8ee5 GM |
1241 | |
1242 | static struct glyph_pool * | |
971de7fb | 1243 | new_glyph_pool (void) |
5f5c8ee5 | 1244 | { |
23f86fce | 1245 | struct glyph_pool *result = xzalloc (sizeof *result); |
177c0ea7 | 1246 | |
f0b79313 | 1247 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
5f5c8ee5 GM |
1248 | /* For memory leak and double deletion checking. */ |
1249 | ++glyph_pool_count; | |
f0b79313 | 1250 | #endif |
177c0ea7 | 1251 | |
5f5c8ee5 GM |
1252 | return result; |
1253 | } | |
1254 | ||
1255 | ||
1256 | /* Free a glyph_pool structure POOL. The function may be called with | |
f0b79313 DA |
1257 | a null POOL pointer. If GLYPH_DEBUG and ENABLE_CHECKING are in effect, |
1258 | global variable glyph_pool_count is decremented with every pool structure | |
1259 | freed. If this count gets negative, more structures were freed than | |
1260 | allocated, i.e. one structure must have been freed more than once or | |
1261 | a bogus pointer was passed to free_glyph_pool. */ | |
5f5c8ee5 GM |
1262 | |
1263 | static void | |
971de7fb | 1264 | free_glyph_pool (struct glyph_pool *pool) |
5f5c8ee5 GM |
1265 | { |
1266 | if (pool) | |
1267 | { | |
f0b79313 | 1268 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
153a073c | 1269 | /* More freed than allocated? */ |
5f5c8ee5 | 1270 | --glyph_pool_count; |
a54e2c05 | 1271 | eassert (glyph_pool_count >= 0); |
f0b79313 | 1272 | #endif |
5f5c8ee5 GM |
1273 | xfree (pool->glyphs); |
1274 | xfree (pool); | |
1275 | } | |
1276 | } | |
1277 | ||
1278 | ||
1279 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1280 | columns we need. This function never shrinks a pool. The only | |
1281 | case in which this would make sense, would be when a frame's size | |
1282 | is changed from a large value to a smaller one. But, if someone | |
1283 | does it once, we can expect that he will do it again. | |
1284 | ||
59ea14cd | 1285 | Return true if the pool changed in a way which makes |
5f5c8ee5 GM |
1286 | re-adjusting window glyph matrices necessary. */ |
1287 | ||
59ea14cd | 1288 | static bool |
971de7fb | 1289 | realloc_glyph_pool (struct glyph_pool *pool, struct dim matrix_dim) |
5f5c8ee5 | 1290 | { |
ca9ce8f2 | 1291 | ptrdiff_t needed; |
59ea14cd | 1292 | bool changed_p; |
5f5c8ee5 GM |
1293 | |
1294 | changed_p = (pool->glyphs == 0 | |
1295 | || matrix_dim.height != pool->nrows | |
1296 | || matrix_dim.width != pool->ncolumns); | |
1297 | ||
1298 | /* Enlarge the glyph pool. */ | |
ca9ce8f2 | 1299 | needed = matrix_dim.width; |
0065d054 PE |
1300 | if (INT_MULTIPLY_OVERFLOW (needed, matrix_dim.height)) |
1301 | memory_full (SIZE_MAX); | |
ca9ce8f2 | 1302 | needed *= matrix_dim.height; |
5f5c8ee5 GM |
1303 | if (needed > pool->nglyphs) |
1304 | { | |
0065d054 PE |
1305 | ptrdiff_t old_nglyphs = pool->nglyphs; |
1306 | pool->glyphs = xpalloc (pool->glyphs, &pool->nglyphs, | |
1307 | needed - old_nglyphs, -1, sizeof *pool->glyphs); | |
1308 | memset (pool->glyphs + old_nglyphs, 0, | |
1309 | (pool->nglyphs - old_nglyphs) * sizeof *pool->glyphs); | |
5f5c8ee5 GM |
1310 | } |
1311 | ||
153a073c | 1312 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1313 | to do sanity checks, and (b) the number of columns determines |
1314 | where rows in the frame matrix start---this must be available to | |
1315 | determine pointers to rows of window sub-matrices. */ | |
1316 | pool->nrows = matrix_dim.height; | |
1317 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1318 | |
5f5c8ee5 GM |
1319 | return changed_p; |
1320 | } | |
1321 | ||
1322 | ||
1323 | \f | |
1324 | /*********************************************************************** | |
1325 | Debug Code | |
1326 | ***********************************************************************/ | |
1327 | ||
e509cfa6 | 1328 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 1329 | |
a13396c9 | 1330 | |
28d440ab KL |
1331 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1332 | XXX Maybe this should be changed to flush the current terminal instead of | |
1333 | stdout. | |
1334 | */ | |
a13396c9 | 1335 | |
85fece3e PE |
1336 | void flush_stdout (void) EXTERNALLY_VISIBLE; |
1337 | ||
a13396c9 | 1338 | void |
59fc5cf9 | 1339 | flush_stdout (void) |
a13396c9 GM |
1340 | { |
1341 | fflush (stdout); | |
1342 | } | |
1343 | ||
1344 | ||
5f5c8ee5 GM |
1345 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1346 | pointer has been lost, e.g. by using a structure assignment between | |
1347 | rows, at least one pointer must occur more than once in the rows of | |
1348 | MATRIX. */ | |
1349 | ||
1350 | void | |
59fc5cf9 | 1351 | check_matrix_pointer_lossage (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
1352 | { |
1353 | int i, j; | |
177c0ea7 | 1354 | |
5f5c8ee5 GM |
1355 | for (i = 0; i < matrix->nrows; ++i) |
1356 | for (j = 0; j < matrix->nrows; ++j) | |
a54e2c05 | 1357 | eassert (i == j |
5f5c8ee5 GM |
1358 | || (matrix->rows[i].glyphs[TEXT_AREA] |
1359 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1360 | } | |
1361 | ||
1362 | ||
1363 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1364 | ||
1365 | struct glyph_row * | |
59fc5cf9 | 1366 | matrix_row (struct glyph_matrix *matrix, int row) |
5f5c8ee5 | 1367 | { |
a54e2c05 DA |
1368 | eassert (matrix && matrix->rows); |
1369 | eassert (row >= 0 && row < matrix->nrows); | |
5f5c8ee5 GM |
1370 | |
1371 | /* That's really too slow for normal testing because this function | |
1372 | is called almost everywhere. Although---it's still astonishingly | |
1373 | fast, so it is valuable to have for debugging purposes. */ | |
1374 | #if 0 | |
1375 | check_matrix_pointer_lossage (matrix); | |
1376 | #endif | |
177c0ea7 | 1377 | |
5f5c8ee5 GM |
1378 | return matrix->rows + row; |
1379 | } | |
1380 | ||
1381 | ||
1382 | #if 0 /* This function makes invalid assumptions when text is | |
1383 | partially invisible. But it might come handy for debugging | |
1384 | nevertheless. */ | |
1385 | ||
1386 | /* Check invariants that must hold for an up to date current matrix of | |
1387 | window W. */ | |
1388 | ||
1389 | static void | |
59fc5cf9 | 1390 | check_matrix_invariants (struct window *w) |
5f5c8ee5 GM |
1391 | { |
1392 | struct glyph_matrix *matrix = w->current_matrix; | |
1393 | int yb = window_text_bottom_y (w); | |
1394 | struct glyph_row *row = matrix->rows; | |
1395 | struct glyph_row *last_text_row = NULL; | |
1396 | struct buffer *saved = current_buffer; | |
e74aeda8 | 1397 | struct buffer *buffer = XBUFFER (w->contents); |
5f5c8ee5 | 1398 | int c; |
177c0ea7 | 1399 | |
5f5c8ee5 GM |
1400 | /* This can sometimes happen for a fresh window. */ |
1401 | if (matrix->nrows < 2) | |
1402 | return; | |
1403 | ||
1404 | set_buffer_temp (buffer); | |
1405 | ||
1406 | /* Note: last row is always reserved for the mode line. */ | |
1407 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1408 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1409 | { | |
1410 | struct glyph_row *next = row + 1; | |
1411 | ||
1412 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1413 | last_text_row = row; | |
1414 | ||
1415 | /* Check that character and byte positions are in sync. */ | |
a54e2c05 | 1416 | eassert (MATRIX_ROW_START_BYTEPOS (row) |
5f5c8ee5 | 1417 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); |
a54e2c05 | 1418 | eassert (BYTEPOS (row->start.pos) |
d36fe237 | 1419 | == CHAR_TO_BYTE (CHARPOS (row->start.pos))); |
5f5c8ee5 GM |
1420 | |
1421 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1422 | have such a position temporarily in case of a minibuffer | |
1423 | displaying something like `[Sole completion]' at its end. */ | |
1424 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
d36fe237 | 1425 | { |
a54e2c05 | 1426 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
d36fe237 | 1427 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); |
a54e2c05 | 1428 | eassert (BYTEPOS (row->end.pos) |
d36fe237 EZ |
1429 | == CHAR_TO_BYTE (CHARPOS (row->end.pos))); |
1430 | } | |
5f5c8ee5 GM |
1431 | |
1432 | /* Check that end position of `row' is equal to start position | |
1433 | of next row. */ | |
1434 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1435 | { | |
a54e2c05 | 1436 | eassert (MATRIX_ROW_END_CHARPOS (row) |
5f5c8ee5 | 1437 | == MATRIX_ROW_START_CHARPOS (next)); |
a54e2c05 | 1438 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
5f5c8ee5 | 1439 | == MATRIX_ROW_START_BYTEPOS (next)); |
a54e2c05 DA |
1440 | eassert (CHARPOS (row->end.pos) == CHARPOS (next->start.pos)); |
1441 | eassert (BYTEPOS (row->end.pos) == BYTEPOS (next->start.pos)); | |
5f5c8ee5 GM |
1442 | } |
1443 | row = next; | |
1444 | } | |
1445 | ||
a54e2c05 DA |
1446 | eassert (w->current_matrix->nrows == w->desired_matrix->nrows); |
1447 | eassert (w->desired_matrix->rows != NULL); | |
5f5c8ee5 GM |
1448 | set_buffer_temp (saved); |
1449 | } | |
1450 | ||
1451 | #endif /* 0 */ | |
1452 | ||
e509cfa6 | 1453 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
1454 | |
1455 | ||
1456 | \f | |
1457 | /********************************************************************** | |
1458 | Allocating/ Adjusting Glyph Matrices | |
1459 | **********************************************************************/ | |
1460 | ||
1461 | /* Allocate glyph matrices over a window tree for a frame-based | |
1462 | redisplay | |
1463 | ||
1464 | X and Y are column/row within the frame glyph matrix where | |
1465 | sub-matrices for the window tree rooted at WINDOW must be | |
59ea14cd | 1466 | allocated. DIM_ONLY_P means that the caller of this |
8ce2650d YM |
1467 | function is only interested in the result matrix dimension, and |
1468 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1469 | |
1470 | The function returns the total width/height of the sub-matrices of | |
1471 | the window tree. If called on a frame root window, the computation | |
1472 | will take the mini-buffer window into account. | |
1473 | ||
1474 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1475 | ||
1476 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1477 | glyph matrices yet, and | |
1478 | ||
1479 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1480 | any window in the tree will be changed or have been changed (see | |
153a073c | 1481 | DIM_ONLY_P) |
5f5c8ee5 GM |
1482 | |
1483 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1484 | function. | |
1485 | ||
1486 | Windows are arranged into chains of windows on the same level | |
1487 | through the next fields of window structures. Such a level can be | |
1488 | either a sequence of horizontally adjacent windows from left to | |
1489 | right, or a sequence of vertically adjacent windows from top to | |
1490 | bottom. Each window in a horizontal sequence can be either a leaf | |
1491 | window or a vertical sequence; a window in a vertical sequence can | |
1492 | be either a leaf or a horizontal sequence. All windows in a | |
1493 | horizontal sequence have the same height, and all windows in a | |
1494 | vertical sequence have the same width. | |
1495 | ||
1496 | This function uses, for historical reasons, a more general | |
1497 | algorithm to determine glyph matrix dimensions that would be | |
1498 | necessary. | |
1499 | ||
1500 | The matrix height of a horizontal sequence is determined by the | |
1501 | maximum height of any matrix in the sequence. The matrix width of | |
1502 | a horizontal sequence is computed by adding up matrix widths of | |
1503 | windows in the sequence. | |
1504 | ||
1505 | |<------- result width ------->| | |
1506 | +---------+----------+---------+ --- | |
1507 | | | | | | | |
1508 | | | | | | |
1509 | +---------+ | | result height | |
1510 | | +---------+ | |
1511 | | | | | |
1512 | +----------+ --- | |
1513 | ||
1514 | The matrix width of a vertical sequence is the maximum matrix width | |
1515 | of any window in the sequence. Its height is computed by adding up | |
1516 | matrix heights of windows in the sequence. | |
1517 | ||
1518 | |<---- result width -->| | |
1519 | +---------+ --- | |
1520 | | | | | |
1521 | | | | | |
1522 | +---------+--+ | | |
1523 | | | | | |
1524 | | | result height | |
1525 | | | | |
1526 | +------------+---------+ | | |
1527 | | | | | |
1528 | | | | | |
1529 | +------------+---------+ --- */ | |
1530 | ||
1531 | /* Bit indicating that a new matrix will be allocated or has been | |
1532 | allocated. */ | |
1533 | ||
1534 | #define NEW_LEAF_MATRIX (1 << 0) | |
1535 | ||
1536 | /* Bit indicating that a matrix will or has changed its location or | |
1537 | size. */ | |
1538 | ||
1539 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1540 | ||
1541 | static struct dim | |
6f704c76 | 1542 | allocate_matrices_for_frame_redisplay (Lisp_Object window, int x, int y, |
59ea14cd | 1543 | bool dim_only_p, int *window_change_flags) |
5f5c8ee5 GM |
1544 | { |
1545 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1546 | int x0 = x, y0 = y; | |
1547 | int wmax = 0, hmax = 0; | |
1548 | struct dim total; | |
1549 | struct dim dim; | |
1550 | struct window *w; | |
59ea14cd | 1551 | bool in_horz_combination_p; |
5f5c8ee5 GM |
1552 | |
1553 | /* What combination is WINDOW part of? Compute this once since the | |
1554 | result is the same for all windows in the `next' chain. The | |
1555 | special case of a root window (parent equal to nil) is treated | |
1556 | like a vertical combination because a root window's `next' | |
1557 | points to the mini-buffer window, if any, which is arranged | |
1558 | vertically below other windows. */ | |
1559 | in_horz_combination_p | |
d3d50620 | 1560 | = (!NILP (XWINDOW (window)->parent) |
e74aeda8 | 1561 | && WINDOW_HORIZONTAL_COMBINATION_P (XWINDOW (XWINDOW (window)->parent))); |
5f5c8ee5 GM |
1562 | |
1563 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1564 | do |
5f5c8ee5 GM |
1565 | { |
1566 | w = XWINDOW (window); | |
1567 | ||
1568 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1569 | on whether this is a combination or a leaf window. */ |
e74aeda8 DA |
1570 | if (WINDOWP (w->contents)) |
1571 | dim = allocate_matrices_for_frame_redisplay (w->contents, x, y, | |
5f5c8ee5 GM |
1572 | dim_only_p, |
1573 | window_change_flags); | |
1574 | else | |
1575 | { | |
1576 | /* If not already done, allocate sub-matrix structures. */ | |
1577 | if (w->desired_matrix == NULL) | |
1578 | { | |
1579 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1580 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1581 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1582 | } | |
177c0ea7 | 1583 | |
5f5c8ee5 GM |
1584 | /* Width and height MUST be chosen so that there are no |
1585 | holes in the frame matrix. */ | |
5d3cc43c GM |
1586 | dim.width = required_matrix_width (w); |
1587 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1588 | |
1589 | /* Will matrix be re-allocated? */ | |
1590 | if (x != w->desired_matrix->matrix_x | |
1591 | || y != w->desired_matrix->matrix_y | |
1592 | || dim.width != w->desired_matrix->matrix_w | |
1593 | || dim.height != w->desired_matrix->matrix_h | |
1594 | || (margin_glyphs_to_reserve (w, dim.width, | |
d3d50620 | 1595 | w->left_margin_cols) |
5f5c8ee5 GM |
1596 | != w->desired_matrix->left_margin_glyphs) |
1597 | || (margin_glyphs_to_reserve (w, dim.width, | |
d3d50620 | 1598 | w->right_margin_cols) |
5f5c8ee5 GM |
1599 | != w->desired_matrix->right_margin_glyphs)) |
1600 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1601 | ||
1602 | /* Actually change matrices, if allowed. Do not consider | |
1603 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1604 | may have been changed which we don't now here. We trust | |
59ea14cd | 1605 | that we only will be called with DIM_ONLY_P when |
5f5c8ee5 GM |
1606 | necessary. */ |
1607 | if (!dim_only_p) | |
1608 | { | |
1609 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1610 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1611 | } | |
1612 | } | |
1613 | ||
1614 | /* If we are part of a horizontal combination, advance x for | |
1615 | windows to the right of W; otherwise advance y for windows | |
1616 | below W. */ | |
1617 | if (in_horz_combination_p) | |
1618 | x += dim.width; | |
177c0ea7 | 1619 | else |
5f5c8ee5 GM |
1620 | y += dim.height; |
1621 | ||
1622 | /* Remember maximum glyph matrix dimensions. */ | |
1623 | wmax = max (wmax, dim.width); | |
1624 | hmax = max (hmax, dim.height); | |
1625 | ||
1626 | /* Next window on same level. */ | |
d3d50620 | 1627 | window = w->next; |
5f5c8ee5 GM |
1628 | } |
1629 | while (!NILP (window)); | |
1630 | ||
1631 | /* Set `total' to the total glyph matrix dimension of this window | |
1632 | level. In a vertical combination, the width is the width of the | |
1633 | widest window; the height is the y we finally reached, corrected | |
1634 | by the y we started with. In a horizontal combination, the total | |
1635 | height is the height of the tallest window, and the width is the | |
1636 | x we finally reached, corrected by the x we started with. */ | |
1637 | if (in_horz_combination_p) | |
1638 | { | |
1639 | total.width = x - x0; | |
1640 | total.height = hmax; | |
1641 | } | |
177c0ea7 | 1642 | else |
5f5c8ee5 GM |
1643 | { |
1644 | total.width = wmax; | |
1645 | total.height = y - y0; | |
1646 | } | |
1647 | ||
1648 | return total; | |
1649 | } | |
1650 | ||
1651 | ||
5d3cc43c GM |
1652 | /* Return the required height of glyph matrices for window W. */ |
1653 | ||
2f7c71a1 | 1654 | static int |
971de7fb | 1655 | required_matrix_height (struct window *w) |
5d3cc43c GM |
1656 | { |
1657 | #ifdef HAVE_WINDOW_SYSTEM | |
d3d50620 | 1658 | struct frame *f = XFRAME (w->frame); |
177c0ea7 | 1659 | |
5d3cc43c GM |
1660 | if (FRAME_WINDOW_P (f)) |
1661 | { | |
1662 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1ea40aa2 | 1663 | int window_pixel_height = window_box_height (w) + eabs (w->vscroll); |
5d3cc43c | 1664 | return (((window_pixel_height + ch_height - 1) |
cc834cf9 | 1665 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
1666 | /* One partially visible line at the top and |
1667 | bottom of the window. */ | |
1668 | + 2 | |
153a073c | 1669 | /* 2 for header and mode line. */ |
5d3cc43c GM |
1670 | + 2); |
1671 | } | |
1672 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 1673 | |
7df02016 | 1674 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
1675 | } |
1676 | ||
1677 | ||
1678 | /* Return the required width of glyph matrices for window W. */ | |
1679 | ||
2f7c71a1 | 1680 | static int |
971de7fb | 1681 | required_matrix_width (struct window *w) |
5d3cc43c GM |
1682 | { |
1683 | #ifdef HAVE_WINDOW_SYSTEM | |
d3d50620 | 1684 | struct frame *f = XFRAME (w->frame); |
5d3cc43c GM |
1685 | if (FRAME_WINDOW_P (f)) |
1686 | { | |
1687 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 1688 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 1689 | |
5d3cc43c GM |
1690 | /* Compute number of glyphs needed in a glyph row. */ |
1691 | return (((window_pixel_width + ch_width - 1) | |
cc834cf9 | 1692 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
1693 | /* 2 partially visible columns in the text area. */ |
1694 | + 2 | |
1695 | /* One partially visible column at the right | |
1696 | edge of each marginal area. */ | |
1697 | + 1 + 1); | |
1698 | } | |
1699 | #endif /* HAVE_WINDOW_SYSTEM */ | |
1700 | ||
5f24fa51 | 1701 | return w->total_cols; |
5d3cc43c GM |
1702 | } |
1703 | ||
1704 | ||
5f5c8ee5 | 1705 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 1706 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 1707 | |
5f5c8ee5 | 1708 | static void |
971de7fb | 1709 | allocate_matrices_for_window_redisplay (struct window *w) |
5f5c8ee5 | 1710 | { |
5f5c8ee5 GM |
1711 | while (w) |
1712 | { | |
e74aeda8 DA |
1713 | if (WINDOWP (w->contents)) |
1714 | allocate_matrices_for_window_redisplay (XWINDOW (w->contents)); | |
5f5c8ee5 GM |
1715 | else |
1716 | { | |
1717 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
1718 | struct dim dim; |
1719 | ||
1720 | /* If matrices are not yet allocated, allocate them now. */ | |
1721 | if (w->desired_matrix == NULL) | |
1722 | { | |
1723 | w->desired_matrix = new_glyph_matrix (NULL); | |
1724 | w->current_matrix = new_glyph_matrix (NULL); | |
1725 | } | |
1726 | ||
5d3cc43c GM |
1727 | dim.width = required_matrix_width (w); |
1728 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1729 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
1730 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
1731 | } | |
177c0ea7 | 1732 | |
d3d50620 | 1733 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
5f5c8ee5 GM |
1734 | } |
1735 | } | |
1736 | ||
bd0443bb DA |
1737 | /* Allocate/reallocate glyph matrices of a single frame F. |
1738 | This function must be called when a new frame is created, | |
1739 | its size changes, or its window configuration changes. */ | |
5f5c8ee5 GM |
1740 | |
1741 | void | |
bd0443bb | 1742 | adjust_frame_glyphs (struct frame *f) |
5f5c8ee5 | 1743 | { |
408f5064 GM |
1744 | /* Block input so that expose events and other events that access |
1745 | glyph matrices are not processed while we are changing them. */ | |
4d7e6e51 | 1746 | block_input (); |
408f5064 | 1747 | |
5f5c8ee5 GM |
1748 | if (FRAME_WINDOW_P (f)) |
1749 | adjust_frame_glyphs_for_window_redisplay (f); | |
1750 | else | |
1751 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 1752 | |
b09cca6a | 1753 | /* Don't forget the buffer for decode_mode_spec. */ |
5f5c8ee5 GM |
1754 | adjust_decode_mode_spec_buffer (f); |
1755 | ||
1756 | f->glyphs_initialized_p = 1; | |
bd0443bb DA |
1757 | |
1758 | unblock_input (); | |
5f5c8ee5 GM |
1759 | } |
1760 | ||
59ea14cd | 1761 | /* Return true if any window in the tree has nonzero window margins. See |
075757cc | 1762 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ |
59ea14cd | 1763 | static bool |
971de7fb | 1764 | showing_window_margins_p (struct window *w) |
075757cc CY |
1765 | { |
1766 | while (w) | |
1767 | { | |
e74aeda8 | 1768 | if (WINDOWP (w->contents)) |
075757cc | 1769 | { |
e74aeda8 | 1770 | if (showing_window_margins_p (XWINDOW (w->contents))) |
075757cc CY |
1771 | return 1; |
1772 | } | |
eeaf9bf3 | 1773 | else if (w->left_margin_cols > 0 || w->right_margin_cols > 0) |
075757cc | 1774 | return 1; |
3fc809e2 | 1775 | |
d3d50620 | 1776 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
075757cc CY |
1777 | } |
1778 | return 0; | |
1779 | } | |
1780 | ||
5f5c8ee5 | 1781 | |
c9f00270 GM |
1782 | /* In the window tree with root W, build current matrices of leaf |
1783 | windows from the frame's current matrix. */ | |
1784 | ||
1785 | static void | |
971de7fb | 1786 | fake_current_matrices (Lisp_Object window) |
c9f00270 GM |
1787 | { |
1788 | struct window *w; | |
177c0ea7 | 1789 | |
d3d50620 | 1790 | for (; !NILP (window); window = w->next) |
c9f00270 GM |
1791 | { |
1792 | w = XWINDOW (window); | |
177c0ea7 | 1793 | |
e74aeda8 DA |
1794 | if (WINDOWP (w->contents)) |
1795 | fake_current_matrices (w->contents); | |
c9f00270 GM |
1796 | else |
1797 | { | |
1798 | int i; | |
d3d50620 | 1799 | struct frame *f = XFRAME (w->frame); |
c9f00270 GM |
1800 | struct glyph_matrix *m = w->current_matrix; |
1801 | struct glyph_matrix *fm = f->current_matrix; | |
1802 | ||
a54e2c05 DA |
1803 | eassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
1804 | eassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 1805 | |
c9f00270 GM |
1806 | for (i = 0; i < m->matrix_h; ++i) |
1807 | { | |
1808 | struct glyph_row *r = m->rows + i; | |
7df02016 | 1809 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 | 1810 | |
a54e2c05 | 1811 | eassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] |
c9f00270 GM |
1812 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); |
1813 | ||
1814 | r->enabled_p = fr->enabled_p; | |
1815 | if (r->enabled_p) | |
1816 | { | |
1817 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
1818 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
1819 | r->used[TEXT_AREA] = (m->matrix_w | |
1820 | - r->used[LEFT_MARGIN_AREA] | |
1821 | - r->used[RIGHT_MARGIN_AREA]); | |
1822 | r->mode_line_p = 0; | |
c9f00270 GM |
1823 | } |
1824 | } | |
1825 | } | |
1826 | } | |
1827 | } | |
1828 | ||
1829 | ||
bccee4f2 | 1830 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 1831 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 1832 | |
bccee4f2 | 1833 | static struct glyph_matrix * |
971de7fb | 1834 | save_current_matrix (struct frame *f) |
c9f00270 | 1835 | { |
bccee4f2 | 1836 | int i; |
38182d90 | 1837 | struct glyph_matrix *saved = xzalloc (sizeof *saved); |
bccee4f2 | 1838 | saved->nrows = f->current_matrix->nrows; |
23f86fce | 1839 | saved->rows = xzalloc (saved->nrows * sizeof *saved->rows); |
bccee4f2 GM |
1840 | |
1841 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 1842 | { |
bccee4f2 GM |
1843 | struct glyph_row *from = f->current_matrix->rows + i; |
1844 | struct glyph_row *to = saved->rows + i; | |
dfd153ae | 1845 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
141f1ff7 | 1846 | |
23f86fce | 1847 | to->glyphs[TEXT_AREA] = xmalloc (nbytes); |
72af86bd | 1848 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
bccee4f2 | 1849 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
fa93733d EZ |
1850 | to->enabled_p = from->enabled_p; |
1851 | to->hash = from->hash; | |
141f1ff7 EZ |
1852 | if (from->used[LEFT_MARGIN_AREA]) |
1853 | { | |
1854 | nbytes = from->used[LEFT_MARGIN_AREA] * sizeof (struct glyph); | |
3b158d11 | 1855 | to->glyphs[LEFT_MARGIN_AREA] = xmalloc (nbytes); |
141f1ff7 EZ |
1856 | memcpy (to->glyphs[LEFT_MARGIN_AREA], |
1857 | from->glyphs[LEFT_MARGIN_AREA], nbytes); | |
1858 | to->used[LEFT_MARGIN_AREA] = from->used[LEFT_MARGIN_AREA]; | |
1859 | } | |
1860 | if (from->used[RIGHT_MARGIN_AREA]) | |
1861 | { | |
1862 | nbytes = from->used[RIGHT_MARGIN_AREA] * sizeof (struct glyph); | |
3b158d11 | 1863 | to->glyphs[RIGHT_MARGIN_AREA] = xmalloc (nbytes); |
141f1ff7 EZ |
1864 | memcpy (to->glyphs[RIGHT_MARGIN_AREA], |
1865 | from->glyphs[RIGHT_MARGIN_AREA], nbytes); | |
1866 | to->used[RIGHT_MARGIN_AREA] = from->used[RIGHT_MARGIN_AREA]; | |
1867 | } | |
e797dea6 | 1868 | } |
bccee4f2 GM |
1869 | |
1870 | return saved; | |
1871 | } | |
1872 | ||
1873 | ||
1874 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
1875 | and free memory associated with SAVED. */ | |
1876 | ||
1877 | static void | |
971de7fb | 1878 | restore_current_matrix (struct frame *f, struct glyph_matrix *saved) |
bccee4f2 GM |
1879 | { |
1880 | int i; | |
1881 | ||
1882 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 1883 | { |
bccee4f2 GM |
1884 | struct glyph_row *from = saved->rows + i; |
1885 | struct glyph_row *to = f->current_matrix->rows + i; | |
dfd153ae | 1886 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
141f1ff7 | 1887 | |
72af86bd | 1888 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
e797dea6 | 1889 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
bccee4f2 | 1890 | xfree (from->glyphs[TEXT_AREA]); |
2fa833da | 1891 | nbytes = from->used[LEFT_MARGIN_AREA] * sizeof (struct glyph); |
141f1ff7 EZ |
1892 | if (nbytes) |
1893 | { | |
1894 | memcpy (to->glyphs[LEFT_MARGIN_AREA], | |
1895 | from->glyphs[LEFT_MARGIN_AREA], nbytes); | |
1896 | to->used[LEFT_MARGIN_AREA] = from->used[LEFT_MARGIN_AREA]; | |
1897 | xfree (from->glyphs[LEFT_MARGIN_AREA]); | |
1898 | } | |
1899 | else | |
1900 | to->used[LEFT_MARGIN_AREA] = 0; | |
2fa833da | 1901 | nbytes = from->used[RIGHT_MARGIN_AREA] * sizeof (struct glyph); |
141f1ff7 EZ |
1902 | if (nbytes) |
1903 | { | |
1904 | memcpy (to->glyphs[RIGHT_MARGIN_AREA], | |
1905 | from->glyphs[RIGHT_MARGIN_AREA], nbytes); | |
1906 | to->used[RIGHT_MARGIN_AREA] = from->used[RIGHT_MARGIN_AREA]; | |
1907 | xfree (from->glyphs[RIGHT_MARGIN_AREA]); | |
1908 | } | |
1909 | else | |
1910 | to->used[RIGHT_MARGIN_AREA] = 0; | |
e797dea6 | 1911 | } |
177c0ea7 | 1912 | |
bccee4f2 GM |
1913 | xfree (saved->rows); |
1914 | xfree (saved); | |
c9f00270 GM |
1915 | } |
1916 | ||
1917 | ||
bccee4f2 | 1918 | |
5f5c8ee5 GM |
1919 | /* Allocate/reallocate glyph matrices of a single frame F for |
1920 | frame-based redisplay. */ | |
1921 | ||
1922 | static void | |
971de7fb | 1923 | adjust_frame_glyphs_for_frame_redisplay (struct frame *f) |
5f5c8ee5 | 1924 | { |
5f5c8ee5 | 1925 | struct dim matrix_dim; |
59ea14cd | 1926 | bool pool_changed_p; |
5f5c8ee5 GM |
1927 | int window_change_flags; |
1928 | int top_window_y; | |
1929 | ||
1930 | if (!FRAME_LIVE_P (f)) | |
1931 | return; | |
1932 | ||
5f5c8ee5 GM |
1933 | top_window_y = FRAME_TOP_MARGIN (f); |
1934 | ||
1935 | /* Allocate glyph pool structures if not already done. */ | |
1936 | if (f->desired_pool == NULL) | |
1937 | { | |
1938 | f->desired_pool = new_glyph_pool (); | |
1939 | f->current_pool = new_glyph_pool (); | |
1940 | } | |
1941 | ||
1942 | /* Allocate frames matrix structures if needed. */ | |
1943 | if (f->desired_matrix == NULL) | |
1944 | { | |
1945 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1946 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
1947 | } | |
177c0ea7 | 1948 | |
5f5c8ee5 GM |
1949 | /* Compute window glyph matrices. (This takes the mini-buffer |
1950 | window into account). The result is the size of the frame glyph | |
1951 | matrix needed. The variable window_change_flags is set to a bit | |
1952 | mask indicating whether new matrices will be allocated or | |
1953 | existing matrices change their size or location within the frame | |
1954 | matrix. */ | |
1955 | window_change_flags = 0; | |
1956 | matrix_dim | |
1957 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
1958 | 0, top_window_y, | |
5d3cc43c | 1959 | 1, |
5f5c8ee5 GM |
1960 | &window_change_flags); |
1961 | ||
1962 | /* Add in menu bar lines, if any. */ | |
1963 | matrix_dim.height += top_window_y; | |
1964 | ||
1965 | /* Enlarge pools as necessary. */ | |
1966 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
1967 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
1968 | ||
177c0ea7 | 1969 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
1970 | absolutely necessary since it requires a frame redraw. */ |
1971 | if (pool_changed_p || window_change_flags) | |
1972 | { | |
1973 | /* Do it for window matrices. */ | |
1974 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 1975 | 0, top_window_y, 0, |
5f5c8ee5 GM |
1976 | &window_change_flags); |
1977 | ||
1978 | /* Size of frame matrices must equal size of frame. Note | |
1979 | that we are called for X frames with window widths NOT equal | |
1980 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
a54e2c05 | 1981 | eassert (matrix_dim.width == FRAME_COLS (f) |
7df02016 | 1982 | && matrix_dim.height == FRAME_LINES (f)); |
177c0ea7 | 1983 | |
e797dea6 GM |
1984 | /* Pointers to glyph memory in glyph rows are exchanged during |
1985 | the update phase of redisplay, which means in general that a | |
1986 | frame's current matrix consists of pointers into both the | |
1987 | desired and current glyph pool of the frame. Adjusting a | |
1988 | matrix sets the frame matrix up so that pointers are all into | |
1989 | the same pool. If we want to preserve glyph contents of the | |
1990 | current matrix over a call to adjust_glyph_matrix, we must | |
1991 | make a copy of the current glyphs, and restore the current | |
1992 | matrix' contents from that copy. */ | |
1993 | if (display_completed | |
1994 | && !FRAME_GARBAGED_P (f) | |
1995 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
1996 | && matrix_dim.height == f->current_matrix->matrix_h |
1997 | /* For some reason, the frame glyph matrix gets corrupted if | |
1998 | any of the windows contain margins. I haven't been able | |
1999 | to hunt down the reason, but for the moment this prevents | |
2000 | the problem from manifesting. -- cyd */ | |
d5c20fe8 | 2001 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) |
e797dea6 | 2002 | { |
bccee4f2 GM |
2003 | struct glyph_matrix *copy = save_current_matrix (f); |
2004 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2005 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2006 | restore_current_matrix (f, copy); |
e797dea6 GM |
2007 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2008 | } | |
c9f00270 | 2009 | else |
e797dea6 | 2010 | { |
bccee4f2 | 2011 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2012 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2013 | SET_FRAME_GARBAGED (f); | |
2014 | } | |
5f5c8ee5 GM |
2015 | } |
2016 | } | |
2017 | ||
2018 | ||
2019 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2020 | window-based redisplay. */ | |
2021 | ||
2022 | static void | |
971de7fb | 2023 | adjust_frame_glyphs_for_window_redisplay (struct frame *f) |
5f5c8ee5 | 2024 | { |
a54e2c05 | 2025 | eassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); |
177c0ea7 | 2026 | |
5f5c8ee5 | 2027 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2028 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2029 | |
742516e0 | 2030 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2031 | /* Allocate/ reallocate matrices of the dummy window used to display |
2032 | the menu bar under X when no X toolkit support is available. */ | |
5f5c8ee5 GM |
2033 | { |
2034 | /* Allocate a dummy window if not already done. */ | |
d2d37ddc | 2035 | struct window *w; |
e69b0960 | 2036 | if (NILP (f->menu_bar_window)) |
5f5c8ee5 | 2037 | { |
077288cf | 2038 | Lisp_Object frame; |
f00af5b1 | 2039 | fset_menu_bar_window (f, make_window ()); |
e69b0960 | 2040 | w = XWINDOW (f->menu_bar_window); |
077288cf | 2041 | XSETFRAME (frame, f); |
e8c17b81 | 2042 | wset_frame (w, frame); |
5f5c8ee5 GM |
2043 | w->pseudo_window_p = 1; |
2044 | } | |
2045 | else | |
e69b0960 | 2046 | w = XWINDOW (f->menu_bar_window); |
5f5c8ee5 GM |
2047 | |
2048 | /* Set window dimensions to frame dimensions and allocate or | |
2049 | adjust glyph matrices of W. */ | |
5f24fa51 DA |
2050 | w->top_line = 0; |
2051 | w->left_col = 0; | |
2052 | w->total_lines = FRAME_MENU_BAR_LINES (f); | |
2053 | w->total_cols = FRAME_TOTAL_COLS (f); | |
5d3cc43c | 2054 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2055 | } |
742516e0 | 2056 | #endif |
5f5c8ee5 | 2057 | |
742516e0 | 2058 | #if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS) |
d2d37ddc PE |
2059 | { |
2060 | /* Allocate/ reallocate matrices of the tool bar window. If we | |
2061 | don't have a tool bar window yet, make one. */ | |
2062 | struct window *w; | |
e69b0960 | 2063 | if (NILP (f->tool_bar_window)) |
d2d37ddc | 2064 | { |
077288cf | 2065 | Lisp_Object frame; |
f00af5b1 | 2066 | fset_tool_bar_window (f, make_window ()); |
e69b0960 | 2067 | w = XWINDOW (f->tool_bar_window); |
077288cf | 2068 | XSETFRAME (frame, f); |
e8c17b81 | 2069 | wset_frame (w, frame); |
d2d37ddc PE |
2070 | w->pseudo_window_p = 1; |
2071 | } | |
2072 | else | |
e69b0960 | 2073 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2074 | |
5f24fa51 DA |
2075 | w->top_line = FRAME_MENU_BAR_LINES (f); |
2076 | w->left_col = 0; | |
2077 | w->total_lines = FRAME_TOOL_BAR_LINES (f); | |
2078 | w->total_cols = FRAME_TOTAL_COLS (f); | |
d2d37ddc PE |
2079 | allocate_matrices_for_window_redisplay (w); |
2080 | } | |
488dd4c4 | 2081 | #endif |
5f5c8ee5 GM |
2082 | } |
2083 | ||
2084 | ||
5f5c8ee5 GM |
2085 | /* Re-allocate buffer for decode_mode_spec on frame F. */ |
2086 | ||
2087 | static void | |
971de7fb | 2088 | adjust_decode_mode_spec_buffer (struct frame *f) |
5f5c8ee5 | 2089 | { |
38182d90 PE |
2090 | f->decode_mode_spec_buffer = xrealloc (f->decode_mode_spec_buffer, |
2091 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
5f5c8ee5 GM |
2092 | } |
2093 | ||
2094 | ||
2095 | \f | |
2096 | /********************************************************************** | |
2097 | Freeing Glyph Matrices | |
2098 | **********************************************************************/ | |
2099 | ||
2100 | /* Free glyph memory for a frame F. F may be null. This function can | |
2101 | be called for the same frame more than once. The root window of | |
2102 | F may be nil when this function is called. This is the case when | |
2103 | the function is called when F is destroyed. */ | |
2104 | ||
2105 | void | |
971de7fb | 2106 | free_glyphs (struct frame *f) |
5f5c8ee5 GM |
2107 | { |
2108 | if (f && f->glyphs_initialized_p) | |
2109 | { | |
42f55fe0 GM |
2110 | /* Block interrupt input so that we don't get surprised by an X |
2111 | event while we're in an inconsistent state. */ | |
4d7e6e51 | 2112 | block_input (); |
5f5c8ee5 | 2113 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2114 | |
5f5c8ee5 | 2115 | /* Release window sub-matrices. */ |
e69b0960 DA |
2116 | if (!NILP (f->root_window)) |
2117 | free_window_matrices (XWINDOW (f->root_window)); | |
5f5c8ee5 | 2118 | |
5a49b79c | 2119 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2120 | /* Free the dummy window for menu bars without X toolkit and its |
2121 | glyph matrices. */ | |
e69b0960 | 2122 | if (!NILP (f->menu_bar_window)) |
5f5c8ee5 | 2123 | { |
e69b0960 | 2124 | struct window *w = XWINDOW (f->menu_bar_window); |
5f5c8ee5 GM |
2125 | free_glyph_matrix (w->desired_matrix); |
2126 | free_glyph_matrix (w->current_matrix); | |
2127 | w->desired_matrix = w->current_matrix = NULL; | |
f00af5b1 | 2128 | fset_menu_bar_window (f, Qnil); |
5f5c8ee5 | 2129 | } |
5a49b79c | 2130 | #endif |
5f5c8ee5 | 2131 | |
742516e0 | 2132 | #if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS) |
9ea173e8 | 2133 | /* Free the tool bar window and its glyph matrices. */ |
e69b0960 | 2134 | if (!NILP (f->tool_bar_window)) |
5f5c8ee5 | 2135 | { |
e69b0960 | 2136 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2137 | free_glyph_matrix (w->desired_matrix); |
2138 | free_glyph_matrix (w->current_matrix); | |
2139 | w->desired_matrix = w->current_matrix = NULL; | |
f00af5b1 | 2140 | fset_tool_bar_window (f, Qnil); |
5f5c8ee5 | 2141 | } |
742516e0 | 2142 | #endif |
5f5c8ee5 GM |
2143 | |
2144 | /* Release frame glyph matrices. Reset fields to zero in | |
2145 | case we are called a second time. */ | |
2146 | if (f->desired_matrix) | |
2147 | { | |
2148 | free_glyph_matrix (f->desired_matrix); | |
2149 | free_glyph_matrix (f->current_matrix); | |
2150 | f->desired_matrix = f->current_matrix = NULL; | |
2151 | } | |
2152 | ||
2153 | /* Release glyph pools. */ | |
2154 | if (f->desired_pool) | |
2155 | { | |
2156 | free_glyph_pool (f->desired_pool); | |
2157 | free_glyph_pool (f->current_pool); | |
2158 | f->desired_pool = f->current_pool = NULL; | |
2159 | } | |
177c0ea7 | 2160 | |
4d7e6e51 | 2161 | unblock_input (); |
5f5c8ee5 GM |
2162 | } |
2163 | } | |
2164 | ||
2165 | ||
2166 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2167 | function may be called with a null pointer, and it may be called on | |
2168 | the same tree more than once. */ | |
2169 | ||
2170 | void | |
971de7fb | 2171 | free_window_matrices (struct window *w) |
5f5c8ee5 GM |
2172 | { |
2173 | while (w) | |
2174 | { | |
e74aeda8 DA |
2175 | if (WINDOWP (w->contents)) |
2176 | free_window_matrices (XWINDOW (w->contents)); | |
177c0ea7 | 2177 | else |
5f5c8ee5 GM |
2178 | { |
2179 | /* This is a leaf window. Free its memory and reset fields | |
2180 | to zero in case this function is called a second time for | |
2181 | W. */ | |
2182 | free_glyph_matrix (w->current_matrix); | |
2183 | free_glyph_matrix (w->desired_matrix); | |
2184 | w->current_matrix = w->desired_matrix = NULL; | |
2185 | } | |
2186 | ||
2187 | /* Next window on same level. */ | |
d3d50620 | 2188 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2189 | } |
2190 | } | |
2191 | ||
2192 | ||
2193 | /* Check glyph memory leaks. This function is called from | |
2194 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2195 | exits. We therefore free all glyph memory for all active frames | |
2196 | explicitly and check that nothing is left allocated. */ | |
2197 | ||
2198 | void | |
971de7fb | 2199 | check_glyph_memory (void) |
5f5c8ee5 GM |
2200 | { |
2201 | Lisp_Object tail, frame; | |
2202 | ||
2203 | /* Free glyph memory for all frames. */ | |
2204 | FOR_EACH_FRAME (tail, frame) | |
2205 | free_glyphs (XFRAME (frame)); | |
2206 | ||
f0b79313 | 2207 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
5f5c8ee5 | 2208 | /* Check that nothing is left allocated. */ |
f0b79313 DA |
2209 | eassert (glyph_matrix_count == 0); |
2210 | eassert (glyph_pool_count == 0); | |
2211 | #endif | |
5f5c8ee5 GM |
2212 | } |
2213 | ||
2214 | ||
2215 | \f | |
2216 | /********************************************************************** | |
2217 | Building a Frame Matrix | |
2218 | **********************************************************************/ | |
2219 | ||
2220 | /* Most of the redisplay code works on glyph matrices attached to | |
2221 | windows. This is a good solution most of the time, but it is not | |
2222 | suitable for terminal code. Terminal output functions cannot rely | |
2223 | on being able to set an arbitrary terminal window. Instead they | |
2224 | must be provided with a view of the whole frame, i.e. the whole | |
2225 | screen. We build such a view by constructing a frame matrix from | |
2226 | window matrices in this section. | |
2227 | ||
65620264 | 2228 | Windows that must be updated have their must_be_updated_p flag set. |
5f5c8ee5 GM |
2229 | For all such windows, their desired matrix is made part of the |
2230 | desired frame matrix. For other windows, their current matrix is | |
2231 | made part of the desired frame matrix. | |
2232 | ||
2233 | +-----------------+----------------+ | |
2234 | | desired | desired | | |
2235 | | | | | |
2236 | +-----------------+----------------+ | |
2237 | | current | | |
2238 | | | | |
2239 | +----------------------------------+ | |
2240 | ||
2241 | Desired window matrices can be made part of the frame matrix in a | |
2242 | cheap way: We exploit the fact that the desired frame matrix and | |
2243 | desired window matrices share their glyph memory. This is not | |
2244 | possible for current window matrices. Their glyphs are copied to | |
2245 | the desired frame matrix. The latter is equivalent to | |
2246 | preserve_other_columns in the old redisplay. | |
2247 | ||
2248 | Used glyphs counters for frame matrix rows are the result of adding | |
2249 | up glyph lengths of the window matrices. A line in the frame | |
2250 | matrix is enabled, if a corresponding line in a window matrix is | |
2251 | enabled. | |
177c0ea7 | 2252 | |
5f5c8ee5 GM |
2253 | After building the desired frame matrix, it will be passed to |
2254 | terminal code, which will manipulate both the desired and current | |
2255 | frame matrix. Changes applied to the frame's current matrix have | |
2256 | to be visible in current window matrices afterwards, of course. | |
2257 | ||
2258 | This problem is solved like this: | |
2259 | ||
2260 | 1. Window and frame matrices share glyphs. Window matrices are | |
2261 | constructed in a way that their glyph contents ARE the glyph | |
2262 | contents needed in a frame matrix. Thus, any modification of | |
2263 | glyphs done in terminal code will be reflected in window matrices | |
2264 | automatically. | |
177c0ea7 | 2265 | |
5f5c8ee5 GM |
2266 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2267 | intercepted by hook functions so that corresponding row operations | |
2268 | on window matrices can be performed. This is necessary because we | |
2269 | use pointers to glyphs in glyph row structures. To satisfy the | |
2270 | assumption of point 1 above that glyphs are updated implicitly in | |
2271 | window matrices when they are manipulated via the frame matrix, | |
2272 | window and frame matrix must of course agree where to find the | |
2273 | glyphs for their rows. Possible manipulations that must be | |
2274 | mirrored are assignments of rows of the desired frame matrix to the | |
2275 | current frame matrix and scrolling the current frame matrix. */ | |
2276 | ||
2277 | /* Build frame F's desired matrix from window matrices. Only windows | |
2278 | which have the flag must_be_updated_p set have to be updated. Menu | |
2279 | bar lines of a frame are not covered by window matrices, so make | |
2280 | sure not to touch them in this function. */ | |
2281 | ||
2282 | static void | |
971de7fb | 2283 | build_frame_matrix (struct frame *f) |
5f5c8ee5 GM |
2284 | { |
2285 | int i; | |
2286 | ||
2287 | /* F must have a frame matrix when this function is called. */ | |
a54e2c05 | 2288 | eassert (!FRAME_WINDOW_P (f)); |
177c0ea7 | 2289 | |
5f5c8ee5 GM |
2290 | /* Clear all rows in the frame matrix covered by window matrices. |
2291 | Menu bar lines are not covered by windows. */ | |
2292 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2293 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2294 | ||
2295 | /* Build the matrix by walking the window tree. */ | |
2296 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2297 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2298 | } | |
2299 | ||
2300 | ||
2301 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2302 | matrices. W is the root of a window tree. */ | |
2303 | ||
2304 | static void | |
971de7fb | 2305 | build_frame_matrix_from_window_tree (struct glyph_matrix *matrix, struct window *w) |
5f5c8ee5 GM |
2306 | { |
2307 | while (w) | |
2308 | { | |
e74aeda8 DA |
2309 | if (WINDOWP (w->contents)) |
2310 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->contents)); | |
5f5c8ee5 GM |
2311 | else |
2312 | build_frame_matrix_from_leaf_window (matrix, w); | |
2313 | ||
d3d50620 | 2314 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2315 | } |
2316 | } | |
2317 | ||
2318 | ||
2319 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2320 | desired frame matrix built. W is a leaf window whose desired or | |
2321 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2322 | must_be_updated_p determines which matrix it contributes to | |
59ea14cd | 2323 | FRAME_MATRIX. If W->must_be_updated_p, W's desired matrix |
5f5c8ee5 GM |
2324 | is added to FRAME_MATRIX, otherwise W's current matrix is added. |
2325 | Adding a desired matrix means setting up used counters and such in | |
2326 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2327 | means copying glyphs. The latter case corresponds to | |
2328 | preserve_other_columns in the old redisplay. */ | |
2329 | ||
2330 | static void | |
971de7fb | 2331 | build_frame_matrix_from_leaf_window (struct glyph_matrix *frame_matrix, struct window *w) |
5f5c8ee5 GM |
2332 | { |
2333 | struct glyph_matrix *window_matrix; | |
2334 | int window_y, frame_y; | |
2335 | /* If non-zero, a glyph to insert at the right border of W. */ | |
3fc809e2 KS |
2336 | GLYPH right_border_glyph; |
2337 | ||
2338 | SET_GLYPH_FROM_CHAR (right_border_glyph, 0); | |
5f5c8ee5 GM |
2339 | |
2340 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2341 | if (w->must_be_updated_p) | |
2342 | { | |
2343 | window_matrix = w->desired_matrix; | |
2344 | ||
2345 | /* Decide whether we want to add a vertical border glyph. */ | |
2346 | if (!WINDOW_RIGHTMOST_P (w)) | |
2347 | { | |
2348 | struct Lisp_Char_Table *dp = window_display_table (w); | |
3fc809e2 | 2349 | Lisp_Object gc; |
b4e49aee | 2350 | |
3fc809e2 KS |
2351 | SET_GLYPH_FROM_CHAR (right_border_glyph, '|'); |
2352 | if (dp | |
d311d28c | 2353 | && (gc = DISP_BORDER_GLYPH (dp), GLYPH_CODE_P (gc))) |
3fc809e2 KS |
2354 | { |
2355 | SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph, gc); | |
2356 | spec_glyph_lookup_face (w, &right_border_glyph); | |
2357 | } | |
b4e49aee | 2358 | |
3fc809e2 KS |
2359 | if (GLYPH_FACE (right_border_glyph) <= 0) |
2360 | SET_GLYPH_FACE (right_border_glyph, VERTICAL_BORDER_FACE_ID); | |
5f5c8ee5 GM |
2361 | } |
2362 | } | |
2363 | else | |
2364 | window_matrix = w->current_matrix; | |
2365 | ||
2366 | /* For all rows in the window matrix and corresponding rows in the | |
2367 | frame matrix. */ | |
2368 | window_y = 0; | |
2369 | frame_y = window_matrix->matrix_y; | |
2370 | while (window_y < window_matrix->nrows) | |
2371 | { | |
2372 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2373 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
59ea14cd | 2374 | bool current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2375 | |
2376 | /* Fill up the frame row with spaces up to the left margin of the | |
2377 | window row. */ | |
2378 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2379 | ||
2380 | /* Fill up areas in the window matrix row with spaces. */ | |
2381 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2382 | |
2383 | /* If only part of W's desired matrix has been built, and | |
2384 | window_row wasn't displayed, use the corresponding current | |
2385 | row instead. */ | |
2386 | if (window_matrix == w->desired_matrix | |
2387 | && !window_row->enabled_p) | |
2388 | { | |
2389 | window_row = w->current_matrix->rows + window_y; | |
2390 | current_row_p = 1; | |
2391 | } | |
177c0ea7 | 2392 | |
2a8bd25f | 2393 | if (current_row_p) |
5f5c8ee5 | 2394 | { |
2a8bd25f | 2395 | /* Copy window row to frame row. */ |
72af86bd AS |
2396 | memcpy (frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, |
2397 | window_row->glyphs[0], | |
2398 | window_matrix->matrix_w * sizeof (struct glyph)); | |
5f5c8ee5 GM |
2399 | } |
2400 | else | |
2401 | { | |
a54e2c05 | 2402 | eassert (window_row->enabled_p); |
177c0ea7 | 2403 | |
2a8bd25f GM |
2404 | /* Only when a desired row has been displayed, we want |
2405 | the corresponding frame row to be updated. */ | |
2406 | frame_row->enabled_p = 1; | |
177c0ea7 | 2407 | |
5f5c8ee5 GM |
2408 | /* Maybe insert a vertical border between horizontally adjacent |
2409 | windows. */ | |
3fc809e2 | 2410 | if (GLYPH_CHAR (right_border_glyph) != 0) |
5f5c8ee5 GM |
2411 | { |
2412 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2413 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2414 | } | |
2415 | ||
e509cfa6 | 2416 | #ifdef GLYPH_DEBUG |
a13396c9 GM |
2417 | /* Window row window_y must be a slice of frame row |
2418 | frame_y. */ | |
a54e2c05 | 2419 | eassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2420 | |
5f5c8ee5 GM |
2421 | /* If rows are in sync, we don't have to copy glyphs because |
2422 | frame and window share glyphs. */ | |
177c0ea7 | 2423 | |
a38634ff | 2424 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2425 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2426 | #endif |
5f5c8ee5 GM |
2427 | } |
2428 | ||
2429 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2430 | up with spaces, and visit leaf windows from left to right it | |
2431 | can be done simply. */ | |
177c0ea7 | 2432 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2433 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2434 | ||
5f5c8ee5 GM |
2435 | /* Next row. */ |
2436 | ++window_y; | |
2437 | ++frame_y; | |
2438 | } | |
2439 | } | |
2440 | ||
5f81871e RS |
2441 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2442 | ID, return a glyph that has a realized face ID. | |
2443 | This is used for glyphs displayed specially and not part of the text; | |
2444 | for instance, vertical separators, truncation markers, etc. */ | |
2445 | ||
3fc809e2 | 2446 | void |
971de7fb | 2447 | spec_glyph_lookup_face (struct window *w, GLYPH *glyph) |
5f81871e | 2448 | { |
3fc809e2 | 2449 | int lface_id = GLYPH_FACE (*glyph); |
5f81871e RS |
2450 | /* Convert the glyph's specified face to a realized (cache) face. */ |
2451 | if (lface_id > 0) | |
2452 | { | |
d3d50620 | 2453 | int face_id = merge_faces (XFRAME (w->frame), |
5f81871e | 2454 | Qt, lface_id, DEFAULT_FACE_ID); |
3fc809e2 | 2455 | SET_GLYPH_FACE (*glyph, face_id); |
5f81871e | 2456 | } |
5f81871e | 2457 | } |
5f5c8ee5 GM |
2458 | |
2459 | /* Add spaces to a glyph row ROW in a window matrix. | |
2460 | ||
2461 | Each row has the form: | |
2462 | ||
2463 | +---------+-----------------------------+------------+ | |
2464 | | left | text | right | | |
2465 | +---------+-----------------------------+------------+ | |
2466 | ||
2467 | Left and right marginal areas are optional. This function adds | |
2468 | spaces to areas so that there are no empty holes between areas. | |
2469 | In other words: If the right area is not empty, the text area | |
2470 | is filled up with spaces up to the right area. If the text area | |
2471 | is not empty, the left area is filled up. | |
2472 | ||
2473 | To be called for frame-based redisplay, only. */ | |
2474 | ||
2475 | static void | |
971de7fb | 2476 | fill_up_glyph_row_with_spaces (struct glyph_row *row) |
5f5c8ee5 GM |
2477 | { |
2478 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2479 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2480 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2481 | } | |
2482 | ||
2483 | ||
2484 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2485 | frame-based redisplay only. */ | |
2486 | ||
2487 | static void | |
971de7fb | 2488 | fill_up_glyph_row_area_with_spaces (struct glyph_row *row, int area) |
5f5c8ee5 GM |
2489 | { |
2490 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2491 | { | |
2492 | struct glyph *end = row->glyphs[area + 1]; | |
2493 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2494 | ||
2495 | while (text < end) | |
2496 | *text++ = space_glyph; | |
2497 | row->used[area] = text - row->glyphs[area]; | |
2498 | } | |
2499 | } | |
2500 | ||
2501 | ||
2502 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2503 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2504 | ||
abe02020 | 2505 | void |
971de7fb | 2506 | fill_up_frame_row_with_spaces (struct glyph_row *row, int upto) |
5f5c8ee5 GM |
2507 | { |
2508 | int i = row->used[TEXT_AREA]; | |
2509 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2510 | |
5f5c8ee5 GM |
2511 | while (i < upto) |
2512 | glyph[i++] = space_glyph; | |
2513 | ||
2514 | row->used[TEXT_AREA] = i; | |
2515 | } | |
2516 | ||
2517 | ||
2518 | \f | |
2519 | /********************************************************************** | |
2520 | Mirroring operations on frame matrices in window matrices | |
2521 | **********************************************************************/ | |
2522 | ||
2523 | /* Set frame being updated via frame-based redisplay to F. This | |
2524 | function must be called before updates to make explicit that we are | |
2525 | working on frame matrices or not. */ | |
2526 | ||
b0ab8123 | 2527 | static void |
971de7fb | 2528 | set_frame_matrix_frame (struct frame *f) |
5f5c8ee5 GM |
2529 | { |
2530 | frame_matrix_frame = f; | |
2531 | } | |
2532 | ||
2533 | ||
2534 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2535 | DESIRED_MATRIX is the desired matrix corresponding to | |
2536 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2537 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2538 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2539 | done in frame matrices, and that we have to perform analogous | |
2540 | operations in window matrices of frame_matrix_frame. */ | |
2541 | ||
b0ab8123 | 2542 | static void |
971de7fb | 2543 | make_current (struct glyph_matrix *desired_matrix, struct glyph_matrix *current_matrix, int row) |
5f5c8ee5 GM |
2544 | { |
2545 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2546 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
59ea14cd | 2547 | bool mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2548 | |
2549 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2550 | between both rows, and does a structure assignment otherwise. */ | |
2551 | assign_row (current_row, desired_row); | |
2552 | ||
2553 | /* Enable current_row to mark it as valid. */ | |
2554 | current_row->enabled_p = 1; | |
e876ff42 | 2555 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2556 | |
2557 | /* If we are called on frame matrices, perform analogous operations | |
2558 | for window matrices. */ | |
2559 | if (frame_matrix_frame) | |
e69b0960 | 2560 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); |
5f5c8ee5 GM |
2561 | } |
2562 | ||
2563 | ||
2564 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2565 | W's frame which has been made current (by swapping pointers between | |
2566 | current and desired matrix). Perform analogous operations in the | |
2567 | matrices of leaf windows in the window tree rooted at W. */ | |
2568 | ||
2569 | static void | |
971de7fb | 2570 | mirror_make_current (struct window *w, int frame_row) |
5f5c8ee5 GM |
2571 | { |
2572 | while (w) | |
2573 | { | |
e74aeda8 DA |
2574 | if (WINDOWP (w->contents)) |
2575 | mirror_make_current (XWINDOW (w->contents), frame_row); | |
5f5c8ee5 GM |
2576 | else |
2577 | { | |
2578 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2579 | here because the checks performed in debug mode there | |
2580 | will not allow the conversion. */ | |
2581 | int row = frame_row - w->desired_matrix->matrix_y; | |
2582 | ||
2583 | /* If FRAME_ROW is within W, assign the desired row to the | |
2584 | current row (exchanging glyph pointers). */ | |
2585 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
2586 | { | |
2587 | struct glyph_row *current_row | |
2588 | = MATRIX_ROW (w->current_matrix, row); | |
2589 | struct glyph_row *desired_row | |
2590 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
2591 | |
2592 | if (desired_row->enabled_p) | |
2593 | assign_row (current_row, desired_row); | |
2594 | else | |
2595 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 | 2596 | current_row->enabled_p = 1; |
d009ae66 EZ |
2597 | |
2598 | /* Set the Y coordinate of the mode/header line's row. | |
2599 | It is needed in draw_row_with_mouse_face to find the | |
2600 | screen coordinates. (Window-based redisplay sets | |
2601 | this in update_window, but no one seems to do that | |
2602 | for frame-based redisplay.) */ | |
2603 | if (current_row->mode_line_p) | |
2604 | current_row->y = row; | |
5f5c8ee5 GM |
2605 | } |
2606 | } | |
177c0ea7 | 2607 | |
d3d50620 | 2608 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2609 | } |
2610 | } | |
2611 | ||
2612 | ||
2613 | /* Perform row dance after scrolling. We are working on the range of | |
2614 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
2615 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
2616 | row I in the range 0 <= I < NLINES, the index of the original line | |
2617 | to move to I. This index is relative to the row range, i.e. 0 <= | |
2618 | index < NLINES. RETAINED_P is a vector containing zero for each | |
2619 | row 0 <= I < NLINES which is empty. | |
2620 | ||
2621 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 2622 | |
5f5c8ee5 | 2623 | void |
6f704c76 DN |
2624 | mirrored_line_dance (struct glyph_matrix *matrix, int unchanged_at_top, int nlines, |
2625 | int *copy_from, char *retained_p) | |
5f5c8ee5 GM |
2626 | { |
2627 | /* A copy of original rows. */ | |
2628 | struct glyph_row *old_rows; | |
2629 | ||
2630 | /* Rows to assign to. */ | |
2631 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 2632 | |
5f5c8ee5 GM |
2633 | int i; |
2634 | ||
2635 | /* Make a copy of the original rows. */ | |
38182d90 | 2636 | old_rows = alloca (nlines * sizeof *old_rows); |
72af86bd | 2637 | memcpy (old_rows, new_rows, nlines * sizeof *old_rows); |
5f5c8ee5 GM |
2638 | |
2639 | /* Assign new rows, maybe clear lines. */ | |
2640 | for (i = 0; i < nlines; ++i) | |
2641 | { | |
59ea14cd | 2642 | bool enabled_before_p = new_rows[i].enabled_p; |
5f5c8ee5 | 2643 | |
a54e2c05 DA |
2644 | eassert (i + unchanged_at_top < matrix->nrows); |
2645 | eassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
5f5c8ee5 GM |
2646 | new_rows[i] = old_rows[copy_from[i]]; |
2647 | new_rows[i].enabled_p = enabled_before_p; | |
2648 | ||
2649 | /* RETAINED_P is zero for empty lines. */ | |
2650 | if (!retained_p[copy_from[i]]) | |
2651 | new_rows[i].enabled_p = 0; | |
2652 | } | |
2653 | ||
153a073c | 2654 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 | 2655 | if (frame_matrix_frame) |
e69b0960 | 2656 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), |
5f5c8ee5 GM |
2657 | unchanged_at_top, nlines, copy_from, retained_p); |
2658 | } | |
2659 | ||
2660 | ||
a13396c9 | 2661 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 2662 | the current frame matrix. */ |
a13396c9 GM |
2663 | |
2664 | static void | |
971de7fb | 2665 | sync_window_with_frame_matrix_rows (struct window *w) |
a13396c9 | 2666 | { |
d3d50620 | 2667 | struct frame *f = XFRAME (w->frame); |
a13396c9 | 2668 | struct glyph_row *window_row, *window_row_end, *frame_row; |
075c507b | 2669 | int left, right, x, width; |
a13396c9 | 2670 | |
e74aeda8 DA |
2671 | /* Preconditions: W must be a live window on a tty frame. */ |
2672 | eassert (BUFFERP (w->contents)); | |
a54e2c05 | 2673 | eassert (!FRAME_WINDOW_P (f)); |
a13396c9 | 2674 | |
d3d50620 DA |
2675 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
2676 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
2677 | x = w->current_matrix->matrix_x; |
2678 | width = w->current_matrix->matrix_w; | |
2679 | ||
a13396c9 GM |
2680 | window_row = w->current_matrix->rows; |
2681 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 2682 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 2683 | |
5cb88111 | 2684 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 2685 | { |
5cb88111 GM |
2686 | window_row->glyphs[LEFT_MARGIN_AREA] |
2687 | = frame_row->glyphs[0] + x; | |
2688 | window_row->glyphs[TEXT_AREA] | |
2689 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
2690 | window_row->glyphs[LAST_AREA] | |
2691 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
2692 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
2693 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
2694 | } |
2695 | } | |
2696 | ||
2697 | ||
2698 | /* Return the window in the window tree rooted in W containing frame | |
2699 | row ROW. Value is null if none is found. */ | |
2700 | ||
09ad5a91 | 2701 | static struct window * |
971de7fb | 2702 | frame_row_to_window (struct window *w, int row) |
a13396c9 GM |
2703 | { |
2704 | struct window *found = NULL; | |
177c0ea7 | 2705 | |
a13396c9 GM |
2706 | while (w && !found) |
2707 | { | |
e74aeda8 DA |
2708 | if (WINDOWP (w->contents)) |
2709 | found = frame_row_to_window (XWINDOW (w->contents), row); | |
7df02016 KS |
2710 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
2711 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 2712 | found = w; |
177c0ea7 | 2713 | |
d3d50620 | 2714 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
a13396c9 GM |
2715 | } |
2716 | ||
2717 | return found; | |
2718 | } | |
2719 | ||
2720 | ||
5f5c8ee5 GM |
2721 | /* Perform a line dance in the window tree rooted at W, after |
2722 | scrolling a frame matrix in mirrored_line_dance. | |
2723 | ||
2724 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
2725 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
2726 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
2727 | I < NLINES, the index of the original line to move to I. This | |
2728 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
2729 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
2730 | which is empty. */ | |
2731 | ||
2732 | static void | |
971de7fb | 2733 | mirror_line_dance (struct window *w, int unchanged_at_top, int nlines, int *copy_from, char *retained_p) |
5f5c8ee5 GM |
2734 | { |
2735 | while (w) | |
2736 | { | |
e74aeda8 DA |
2737 | if (WINDOWP (w->contents)) |
2738 | mirror_line_dance (XWINDOW (w->contents), unchanged_at_top, | |
5f5c8ee5 GM |
2739 | nlines, copy_from, retained_p); |
2740 | else | |
2741 | { | |
2742 | /* W is a leaf window, and we are working on its current | |
2743 | matrix m. */ | |
2744 | struct glyph_matrix *m = w->current_matrix; | |
59ea14cd PE |
2745 | int i; |
2746 | bool sync_p = 0; | |
5f5c8ee5 GM |
2747 | struct glyph_row *old_rows; |
2748 | ||
2749 | /* Make a copy of the original rows of matrix m. */ | |
38182d90 | 2750 | old_rows = alloca (m->nrows * sizeof *old_rows); |
72af86bd | 2751 | memcpy (old_rows, m->rows, m->nrows * sizeof *old_rows); |
5f5c8ee5 GM |
2752 | |
2753 | for (i = 0; i < nlines; ++i) | |
2754 | { | |
2755 | /* Frame relative line assigned to. */ | |
2756 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 2757 | |
5f5c8ee5 GM |
2758 | /* Frame relative line assigned. */ |
2759 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 2760 | |
5f5c8ee5 GM |
2761 | /* Window relative line assigned to. */ |
2762 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 2763 | |
5f5c8ee5 GM |
2764 | /* Window relative line assigned. */ |
2765 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 2766 | |
5f5c8ee5 | 2767 | /* Is assigned line inside window? */ |
59ea14cd | 2768 | bool from_inside_window_p |
5f5c8ee5 | 2769 | = window_from >= 0 && window_from < m->matrix_h; |
177c0ea7 | 2770 | |
a13396c9 | 2771 | /* Is assigned to line inside window? */ |
59ea14cd | 2772 | bool to_inside_window_p |
a13396c9 | 2773 | = window_to >= 0 && window_to < m->matrix_h; |
177c0ea7 | 2774 | |
a13396c9 | 2775 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 2776 | { |
5f5c8ee5 GM |
2777 | /* Do the assignment. The enabled_p flag is saved |
2778 | over the assignment because the old redisplay did | |
2779 | that. */ | |
59ea14cd | 2780 | bool enabled_before_p = m->rows[window_to].enabled_p; |
5f5c8ee5 GM |
2781 | m->rows[window_to] = old_rows[window_from]; |
2782 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 2783 | |
5f5c8ee5 GM |
2784 | /* If frame line is empty, window line is empty, too. */ |
2785 | if (!retained_p[copy_from[i]]) | |
2786 | m->rows[window_to].enabled_p = 0; | |
2787 | } | |
a13396c9 GM |
2788 | else if (to_inside_window_p) |
2789 | { | |
2790 | /* A copy between windows. This is an infrequent | |
2791 | case not worth optimizing. */ | |
d3d50620 | 2792 | struct frame *f = XFRAME (w->frame); |
a13396c9 GM |
2793 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
2794 | struct window *w2; | |
2795 | struct glyph_matrix *m2; | |
2796 | int m2_from; | |
2797 | ||
fe8b8401 | 2798 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
2799 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
2800 | -nw', FROM_FRAME sometimes has no associated window. | |
2801 | This check avoids a segfault if W2 is null. */ | |
2802 | if (w2) | |
2803 | { | |
2804 | m2 = w2->current_matrix; | |
2805 | m2_from = frame_from - m2->matrix_y; | |
2806 | copy_row_except_pointers (m->rows + window_to, | |
2807 | m2->rows + m2_from); | |
2808 | ||
2809 | /* If frame line is empty, window line is empty, too. */ | |
2810 | if (!retained_p[copy_from[i]]) | |
2811 | m->rows[window_to].enabled_p = 0; | |
2812 | } | |
a13396c9 GM |
2813 | sync_p = 1; |
2814 | } | |
2815 | else if (from_inside_window_p) | |
2816 | sync_p = 1; | |
5f5c8ee5 | 2817 | } |
a13396c9 GM |
2818 | |
2819 | /* If there was a copy between windows, make sure glyph | |
2820 | pointers are in sync with the frame matrix. */ | |
2821 | if (sync_p) | |
2822 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 2823 | |
5f5c8ee5 GM |
2824 | /* Check that no pointers are lost. */ |
2825 | CHECK_MATRIX (m); | |
2826 | } | |
2827 | ||
2828 | /* Next window on same level. */ | |
d3d50620 | 2829 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2830 | } |
2831 | } | |
2832 | ||
2833 | ||
e509cfa6 | 2834 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
2835 | |
2836 | /* Check that window and frame matrices agree about their | |
2837 | understanding where glyphs of the rows are to find. For each | |
2838 | window in the window tree rooted at W, check that rows in the | |
2839 | matrices of leaf window agree with their frame matrices about | |
2840 | glyph pointers. */ | |
2841 | ||
85fece3e | 2842 | static void |
59fc5cf9 | 2843 | check_window_matrix_pointers (struct window *w) |
5f5c8ee5 GM |
2844 | { |
2845 | while (w) | |
2846 | { | |
e74aeda8 DA |
2847 | if (WINDOWP (w->contents)) |
2848 | check_window_matrix_pointers (XWINDOW (w->contents)); | |
5f5c8ee5 | 2849 | else |
60a8948a | 2850 | { |
d3d50620 | 2851 | struct frame *f = XFRAME (w->frame); |
5f5c8ee5 GM |
2852 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); |
2853 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 2854 | } |
177c0ea7 | 2855 | |
d3d50620 | 2856 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2857 | } |
2858 | } | |
2859 | ||
2860 | ||
2861 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
2862 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
2863 | each row in WINDOW_MATRIX check that it's a slice of the | |
2864 | corresponding frame row. If it isn't, abort. */ | |
2865 | ||
2866 | static void | |
59fc5cf9 AS |
2867 | check_matrix_pointers (struct glyph_matrix *window_matrix, |
2868 | struct glyph_matrix *frame_matrix) | |
5f5c8ee5 GM |
2869 | { |
2870 | /* Row number in WINDOW_MATRIX. */ | |
2871 | int i = 0; | |
2872 | ||
2873 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
2874 | int j = window_matrix->matrix_y; | |
2875 | ||
177c0ea7 | 2876 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
2877 | slice of the row in the frame matrix. If it isn't we didn't |
2878 | mirror an operation on the frame matrix correctly. */ | |
2879 | while (i < window_matrix->nrows) | |
2880 | { | |
2881 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
2882 | frame_matrix->rows + j)) | |
1088b922 | 2883 | emacs_abort (); |
5f5c8ee5 GM |
2884 | ++i, ++j; |
2885 | } | |
2886 | } | |
2887 | ||
e509cfa6 | 2888 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
2889 | |
2890 | ||
2891 | \f | |
2892 | /********************************************************************** | |
2893 | VPOS and HPOS translations | |
2894 | **********************************************************************/ | |
2895 | ||
e509cfa6 | 2896 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
2897 | |
2898 | /* Translate vertical position VPOS which is relative to window W to a | |
2899 | vertical position relative to W's frame. */ | |
2900 | ||
2901 | static int | |
59fc5cf9 | 2902 | window_to_frame_vpos (struct window *w, int vpos) |
5f5c8ee5 | 2903 | { |
d3d50620 | 2904 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
a54e2c05 | 2905 | eassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); |
7df02016 | 2906 | vpos += WINDOW_TOP_EDGE_LINE (w); |
d3d50620 | 2907 | eassert (vpos >= 0 && vpos <= FRAME_LINES (XFRAME (w->frame))); |
5f5c8ee5 GM |
2908 | return vpos; |
2909 | } | |
2910 | ||
2911 | ||
2912 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 2913 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
2914 | |
2915 | static int | |
59fc5cf9 | 2916 | window_to_frame_hpos (struct window *w, int hpos) |
5f5c8ee5 | 2917 | { |
d3d50620 | 2918 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 2919 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
2920 | return hpos; |
2921 | } | |
177c0ea7 | 2922 | |
5f5c8ee5 GM |
2923 | #endif /* GLYPH_DEBUG */ |
2924 | ||
2925 | ||
2926 | \f | |
2927 | /********************************************************************** | |
2928 | Redrawing Frames | |
2929 | **********************************************************************/ | |
2930 | ||
2a14f83b | 2931 | /* Redraw frame F. */ |
5f5c8ee5 | 2932 | |
2a14f83b DA |
2933 | void |
2934 | redraw_frame (struct frame *f) | |
2935 | { | |
2936 | /* Error if F has no glyphs. */ | |
2937 | eassert (f->glyphs_initialized_p); | |
5f5c8ee5 | 2938 | update_begin (f); |
f2adda5e | 2939 | if (FRAME_MSDOS_P (f)) |
79d39b69 | 2940 | FRAME_TERMINAL (f)->set_terminal_modes_hook (FRAME_TERMINAL (f)); |
385ed61f | 2941 | clear_frame (f); |
5f5c8ee5 GM |
2942 | clear_current_matrices (f); |
2943 | update_end (f); | |
94ae2ad4 | 2944 | windows_or_buffers_changed = 13; |
5f5c8ee5 GM |
2945 | /* Mark all windows as inaccurate, so that every window will have |
2946 | its redisplay done. */ | |
2947 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
44ad1cf7 SM |
2948 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), true); |
2949 | f->garbaged = false; | |
5f5c8ee5 GM |
2950 | } |
2951 | ||
2a14f83b DA |
2952 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 0, 1, 0, |
2953 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. | |
2954 | If FRAME is omitted or nil, the selected frame is used. */) | |
2955 | (Lisp_Object frame) | |
5f5c8ee5 | 2956 | { |
2a14f83b DA |
2957 | redraw_frame (decode_live_frame (frame)); |
2958 | return Qnil; | |
5f5c8ee5 GM |
2959 | } |
2960 | ||
5f5c8ee5 | 2961 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", |
7ee72033 | 2962 | doc: /* Clear and redisplay all visible frames. */) |
5842a27b | 2963 | (void) |
5f5c8ee5 GM |
2964 | { |
2965 | Lisp_Object tail, frame; | |
2966 | ||
2967 | FOR_EACH_FRAME (tail, frame) | |
2968 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
2a14f83b | 2969 | redraw_frame (XFRAME (frame)); |
5f5c8ee5 GM |
2970 | |
2971 | return Qnil; | |
2972 | } | |
2973 | ||
2974 | ||
5f5c8ee5 | 2975 | \f |
5f5c8ee5 GM |
2976 | /*********************************************************************** |
2977 | Frame Update | |
2978 | ***********************************************************************/ | |
4588ec20 | 2979 | |
5f5c8ee5 | 2980 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 2981 | |
59ea14cd PE |
2982 | If FORCE_P, don't let redisplay be stopped by detecting pending input. |
2983 | If INHIBIT_HAIRY_ID_P, don't try scrolling. | |
177c0ea7 | 2984 | |
59ea14cd | 2985 | Value is true if redisplay was stopped due to pending input. */ |
4588ec20 | 2986 | |
59ea14cd PE |
2987 | bool |
2988 | update_frame (struct frame *f, bool force_p, bool inhibit_hairy_id_p) | |
5f5c8ee5 | 2989 | { |
59ea14cd PE |
2990 | /* True means display has been paused because of pending input. */ |
2991 | bool paused_p; | |
e69b0960 | 2992 | struct window *root_window = XWINDOW (f->root_window); |
5f5c8ee5 | 2993 | |
a2130dbb KS |
2994 | if (redisplay_dont_pause) |
2995 | force_p = 1; | |
6fd326b7 | 2996 | else if (!force_p && detect_input_pending_ignore_squeezables ()) |
d012c62b | 2997 | { |
6fd326b7 DA |
2998 | paused_p = 1; |
2999 | goto do_pause; | |
d012c62b | 3000 | } |
d012c62b | 3001 | |
5f5c8ee5 | 3002 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3003 | { |
5f5c8ee5 GM |
3004 | /* We are working on window matrix basis. All windows whose |
3005 | flag must_be_updated_p is set have to be updated. */ | |
3006 | ||
3007 | /* Record that we are not working on frame matrices. */ | |
3008 | set_frame_matrix_frame (NULL); | |
3009 | ||
3010 | /* Update all windows in the window tree of F, maybe stopping | |
3011 | when pending input is detected. */ | |
3012 | update_begin (f); | |
3013 | ||
5a49b79c | 3014 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
3015 | /* Update the menu bar on X frames that don't have toolkit |
3016 | support. */ | |
e69b0960 DA |
3017 | if (WINDOWP (f->menu_bar_window)) |
3018 | update_window (XWINDOW (f->menu_bar_window), 1); | |
5a49b79c | 3019 | #endif |
5f5c8ee5 | 3020 | |
742516e0 | 3021 | #if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS) |
5f5c8ee5 | 3022 | /* Update the tool-bar window, if present. */ |
e69b0960 | 3023 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3024 | { |
e69b0960 | 3025 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3026 | |
3027 | /* Update tool-bar window. */ | |
3028 | if (w->must_be_updated_p) | |
4588ec20 | 3029 | { |
153a073c PJ |
3030 | Lisp_Object tem; |
3031 | ||
5f5c8ee5 | 3032 | update_window (w, 1); |
44ad1cf7 | 3033 | w->must_be_updated_p = false; |
5f5c8ee5 GM |
3034 | |
3035 | /* Swap tool-bar strings. We swap because we want to | |
3036 | reuse strings. */ | |
e69b0960 | 3037 | tem = f->current_tool_bar_string; |
f00af5b1 PE |
3038 | fset_current_tool_bar_string (f, f->desired_tool_bar_string); |
3039 | fset_desired_tool_bar_string (f, tem); | |
4588ec20 JB |
3040 | } |
3041 | } | |
742516e0 | 3042 | #endif |
5f5c8ee5 GM |
3043 | |
3044 | /* Update windows. */ | |
3045 | paused_p = update_window_tree (root_window, force_p); | |
3046 | update_end (f); | |
4588ec20 | 3047 | } |
5f5c8ee5 GM |
3048 | else |
3049 | { | |
3050 | /* We are working on frame matrix basis. Set the frame on whose | |
3051 | frame matrix we operate. */ | |
3052 | set_frame_matrix_frame (f); | |
3053 | ||
868dd24b | 3054 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3055 | build_frame_matrix (f); |
177c0ea7 | 3056 | |
868dd24b GM |
3057 | /* Update the display */ |
3058 | update_begin (f); | |
5f5c8ee5 | 3059 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3060 | update_end (f); |
3061 | ||
7d2f1216 | 3062 | if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f)) |
3224dac1 | 3063 | { |
0b0d3e0b KL |
3064 | if (FRAME_TTY (f)->termscript) |
3065 | fflush (FRAME_TTY (f)->termscript); | |
7d2f1216 EZ |
3066 | if (FRAME_TERMCAP_P (f)) |
3067 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3068 | } |
868dd24b | 3069 | |
5f5c8ee5 | 3070 | /* Check window matrices for lost pointers. */ |
e509cfa6 | 3071 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
3072 | check_window_matrix_pointers (root_window); |
3073 | add_frame_display_history (f, paused_p); | |
3074 | #endif | |
5f5c8ee5 GM |
3075 | } |
3076 | ||
993d4ab6 | 3077 | do_pause: |
5f5c8ee5 | 3078 | /* Reset flags indicating that a window should be updated. */ |
44ad1cf7 | 3079 | set_window_update_flags (root_window, false); |
177c0ea7 | 3080 | |
868dd24b | 3081 | display_completed = !paused_p; |
5f5c8ee5 | 3082 | return paused_p; |
4588ec20 | 3083 | } |
5f5c8ee5 | 3084 | |
b5e9cbb6 EZ |
3085 | /* Update a TTY frame F that has a menu dropped down over some of its |
3086 | glyphs. This is like the second part of update_frame, but it | |
3087 | doesn't call build_frame_matrix, because we already have the | |
3088 | desired matrix prepared, and don't want it to be overwritten by the | |
3089 | text of the normal display. */ | |
3090 | void | |
3091 | update_frame_with_menu (struct frame *f) | |
3092 | { | |
3093 | struct window *root_window = XWINDOW (f->root_window); | |
e7873136 | 3094 | bool paused_p; |
b5e9cbb6 | 3095 | |
e7873136 | 3096 | eassert (FRAME_TERMCAP_P (f)); |
b5e9cbb6 EZ |
3097 | |
3098 | /* We are working on frame matrix basis. Set the frame on whose | |
3099 | frame matrix we operate. */ | |
3100 | set_frame_matrix_frame (f); | |
3101 | ||
44ad1cf7 | 3102 | /* Update the display. */ |
b5e9cbb6 | 3103 | update_begin (f); |
141f1ff7 EZ |
3104 | /* Force update_frame_1 not to stop due to pending input, and not |
3105 | try scrolling. */ | |
b5e9cbb6 EZ |
3106 | paused_p = update_frame_1 (f, 1, 1); |
3107 | update_end (f); | |
3108 | ||
3109 | if (FRAME_TTY (f)->termscript) | |
3110 | fflush (FRAME_TTY (f)->termscript); | |
3111 | fflush (FRAME_TTY (f)->output); | |
3112 | /* Check window matrices for lost pointers. */ | |
3113 | #if GLYPH_DEBUG | |
ffc3882f EZ |
3114 | #if 0 |
3115 | /* We cannot possibly survive the matrix pointers check, since | |
3116 | we have overwritten parts of the frame glyph matrix without | |
3117 | making any updates to the window matrices. */ | |
b5e9cbb6 | 3118 | check_window_matrix_pointers (root_window); |
ffc3882f | 3119 | #endif |
b5e9cbb6 | 3120 | add_frame_display_history (f, paused_p); |
3b158d11 PE |
3121 | #else |
3122 | IF_LINT ((void) paused_p); | |
b5e9cbb6 EZ |
3123 | #endif |
3124 | ||
3125 | /* Reset flags indicating that a window should be updated. */ | |
44ad1cf7 | 3126 | set_window_update_flags (root_window, false); |
b5e9cbb6 | 3127 | } |
5f5c8ee5 | 3128 | |
4588ec20 | 3129 | \f |
5f5c8ee5 GM |
3130 | /************************************************************************ |
3131 | Window-based updates | |
3132 | ************************************************************************/ | |
3133 | ||
59ea14cd PE |
3134 | /* Perform updates in window tree rooted at W. |
3135 | If FORCE_P, don't stop updating if input is pending. */ | |
5f5c8ee5 | 3136 | |
59ea14cd PE |
3137 | static bool |
3138 | update_window_tree (struct window *w, bool force_p) | |
5f5c8ee5 | 3139 | { |
59ea14cd | 3140 | bool paused_p = 0; |
177c0ea7 | 3141 | |
5f5c8ee5 GM |
3142 | while (w && !paused_p) |
3143 | { | |
e74aeda8 DA |
3144 | if (WINDOWP (w->contents)) |
3145 | paused_p |= update_window_tree (XWINDOW (w->contents), force_p); | |
5f5c8ee5 GM |
3146 | else if (w->must_be_updated_p) |
3147 | paused_p |= update_window (w, force_p); | |
3148 | ||
d3d50620 | 3149 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
3150 | } |
3151 | ||
3152 | return paused_p; | |
3153 | } | |
3154 | ||
3155 | ||
59ea14cd PE |
3156 | /* Update window W if its flag must_be_updated_p is set. |
3157 | If FORCE_P, don't stop updating if input is pending. */ | |
5f5c8ee5 GM |
3158 | |
3159 | void | |
59ea14cd | 3160 | update_single_window (struct window *w, bool force_p) |
5f5c8ee5 GM |
3161 | { |
3162 | if (w->must_be_updated_p) | |
3163 | { | |
3164 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
3165 | ||
3166 | /* Record that this is not a frame-based redisplay. */ | |
3167 | set_frame_matrix_frame (NULL); | |
3168 | ||
a2130dbb KS |
3169 | if (redisplay_dont_pause) |
3170 | force_p = 1; | |
d012c62b | 3171 | |
5f5c8ee5 GM |
3172 | /* Update W. */ |
3173 | update_begin (f); | |
3174 | update_window (w, force_p); | |
3175 | update_end (f); | |
4588ec20 | 3176 | |
5f5c8ee5 | 3177 | /* Reset flag in W. */ |
44ad1cf7 | 3178 | w->must_be_updated_p = false; |
5f5c8ee5 GM |
3179 | } |
3180 | } | |
4588ec20 | 3181 | |
93e023fc | 3182 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 3183 | |
408f5064 GM |
3184 | /* Redraw lines from the current matrix of window W that are |
3185 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
3186 | ||
3187 | static void | |
971de7fb | 3188 | redraw_overlapped_rows (struct window *w, int yb) |
408f5064 | 3189 | { |
d8ee7803 | 3190 | int i; |
fa971ac3 | 3191 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3fc809e2 | 3192 | |
408f5064 GM |
3193 | /* If rows overlapping others have been changed, the rows being |
3194 | overlapped have to be redrawn. This won't draw lines that have | |
3195 | already been drawn in update_window_line because overlapped_p in | |
3196 | desired rows is 0, so after row assignment overlapped_p in | |
3197 | current rows is 0. */ | |
3198 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
3199 | { | |
e876ff42 | 3200 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
3201 | |
3202 | if (!row->enabled_p) | |
3203 | break; | |
3204 | else if (row->mode_line_p) | |
3205 | continue; | |
177c0ea7 | 3206 | |
408f5064 GM |
3207 | if (row->overlapped_p) |
3208 | { | |
3209 | enum glyph_row_area area; | |
177c0ea7 | 3210 | |
408f5064 GM |
3211 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
3212 | { | |
f60e429a DA |
3213 | output_cursor_to (w, i, 0, row->y, |
3214 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 3215 | if (row->used[area]) |
7f780da6 DA |
3216 | FRAME_RIF (f)->write_glyphs (w, row, row->glyphs[area], |
3217 | area, row->used[area]); | |
3218 | FRAME_RIF (f)->clear_end_of_line (w, row, area, -1); | |
408f5064 | 3219 | } |
177c0ea7 | 3220 | |
408f5064 GM |
3221 | row->overlapped_p = 0; |
3222 | } | |
3223 | ||
e876ff42 | 3224 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
3225 | break; |
3226 | } | |
3227 | } | |
3228 | ||
3229 | ||
3230 | /* Redraw lines from the current matrix of window W that overlap | |
3231 | others. YB is bottom-most y-position in W. */ | |
3232 | ||
3233 | static void | |
971de7fb | 3234 | redraw_overlapping_rows (struct window *w, int yb) |
408f5064 GM |
3235 | { |
3236 | int i, bottom_y; | |
3237 | struct glyph_row *row; | |
fa971ac3 | 3238 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
3fc809e2 | 3239 | |
408f5064 GM |
3240 | for (i = 0; i < w->current_matrix->nrows; ++i) |
3241 | { | |
3242 | row = w->current_matrix->rows + i; | |
3243 | ||
3244 | if (!row->enabled_p) | |
3245 | break; | |
3246 | else if (row->mode_line_p) | |
3247 | continue; | |
177c0ea7 | 3248 | |
408f5064 GM |
3249 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
3250 | ||
b4b2c2ca | 3251 | if (row->overlapping_p) |
408f5064 | 3252 | { |
41124e06 YM |
3253 | int overlaps = 0; |
3254 | ||
b4b2c2ca | 3255 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) && i > 0 |
41124e06 YM |
3256 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) |
3257 | overlaps |= OVERLAPS_PRED; | |
b4b2c2ca | 3258 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) && bottom_y < yb |
41124e06 YM |
3259 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) |
3260 | overlaps |= OVERLAPS_SUCC; | |
3261 | ||
3262 | if (overlaps) | |
3263 | { | |
3264 | if (row->used[LEFT_MARGIN_AREA]) | |
3265 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
3266 | ||
3267 | if (row->used[TEXT_AREA]) | |
3268 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
3269 | ||
3270 | if (row->used[RIGHT_MARGIN_AREA]) | |
3271 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
3272 | ||
c5e87d10 | 3273 | /* Record in neighbor rows that ROW overwrites part of |
41124e06 YM |
3274 | their display. */ |
3275 | if (overlaps & OVERLAPS_PRED) | |
3276 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
3277 | if (overlaps & OVERLAPS_SUCC) | |
3278 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
3279 | } | |
408f5064 GM |
3280 | } |
3281 | ||
3282 | if (bottom_y >= yb) | |
3283 | break; | |
3284 | } | |
3285 | } | |
3286 | ||
93e023fc KS |
3287 | #endif /* HAVE_WINDOW_SYSTEM */ |
3288 | ||
408f5064 | 3289 | |
09ad5a91 | 3290 | #if defined GLYPH_DEBUG && 0 |
93962bfa GM |
3291 | |
3292 | /* Check that no row in the current matrix of window W is enabled | |
3293 | which is below what's displayed in the window. */ | |
3294 | ||
09ad5a91 | 3295 | static void |
971de7fb | 3296 | check_current_matrix_flags (struct window *w) |
93962bfa | 3297 | { |
59ea14cd | 3298 | bool last_seen_p = 0; |
93962bfa GM |
3299 | int i, yb = window_text_bottom_y (w); |
3300 | ||
3301 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
3302 | { | |
3303 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
3304 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3305 | last_seen_p = 1; | |
3306 | else if (last_seen_p && row->enabled_p) | |
1088b922 | 3307 | emacs_abort (); |
93962bfa GM |
3308 | } |
3309 | } | |
3310 | ||
3311 | #endif /* GLYPH_DEBUG */ | |
3312 | ||
3313 | ||
59ea14cd PE |
3314 | /* Update display of window W. |
3315 | If FORCE_P, don't stop updating when input is pending. */ | |
5f5c8ee5 | 3316 | |
59ea14cd PE |
3317 | static bool |
3318 | update_window (struct window *w, bool force_p) | |
4588ec20 | 3319 | { |
5f5c8ee5 | 3320 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
59ea14cd | 3321 | bool paused_p; |
5f5c8ee5 | 3322 | int preempt_count = baud_rate / 2400 + 1; |
597cfb3f | 3323 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
e509cfa6 | 3324 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 3325 | /* Check that W's frame doesn't have glyph matrices. */ |
a54e2c05 | 3326 | eassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 3327 | #endif |
5f5c8ee5 GM |
3328 | |
3329 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb | 3330 | if (!force_p) |
a2d5fca0 | 3331 | detect_input_pending_ignore_squeezables (); |
4588ec20 | 3332 | |
5f5c8ee5 GM |
3333 | /* If forced to complete the update, or if no input is pending, do |
3334 | the update. */ | |
8fd9a666 | 3335 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 3336 | { |
5f5c8ee5 GM |
3337 | struct glyph_row *row, *end; |
3338 | struct glyph_row *mode_line_row; | |
56974e03 | 3339 | struct glyph_row *header_line_row; |
59ea14cd PE |
3340 | int yb; |
3341 | bool changed_p = 0, mouse_face_overwritten_p = 0; | |
0bc32927 | 3342 | int n_updated = 0; |
5f5c8ee5 GM |
3343 | |
3344 | rif->update_window_begin_hook (w); | |
3345 | yb = window_text_bottom_y (w); | |
138c0ae8 EZ |
3346 | row = MATRIX_ROW (desired_matrix, 0); |
3347 | end = MATRIX_MODE_LINE_ROW (desired_matrix); | |
177c0ea7 | 3348 | |
394305db EZ |
3349 | /* Take note of the header line, if there is one. We will |
3350 | update it below, after updating all of the window's lines. */ | |
5f5c8ee5 | 3351 | if (row->mode_line_p) |
56974e03 GM |
3352 | { |
3353 | header_line_row = row; | |
3354 | ++row; | |
3355 | } | |
3356 | else | |
3357 | header_line_row = NULL; | |
5f5c8ee5 GM |
3358 | |
3359 | /* Update the mode line, if necessary. */ | |
3360 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
3361 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
3362 | { | |
3363 | mode_line_row->y = yb; | |
3364 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
3365 | desired_matrix), |
3366 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3367 | } |
3368 | ||
3369 | /* Find first enabled row. Optimizations in redisplay_internal | |
3370 | may lead to an update with only one row enabled. There may | |
3371 | be also completely empty matrices. */ | |
3372 | while (row < end && !row->enabled_p) | |
3373 | ++row; | |
177c0ea7 | 3374 | |
bfdcafe1 | 3375 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 3376 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
3377 | { |
3378 | int rc = scrolling_window (w, header_line_row != NULL); | |
3379 | if (rc < 0) | |
3380 | { | |
3381 | /* All rows were found to be equal. */ | |
3382 | paused_p = 0; | |
3383 | goto set_cursor; | |
3384 | } | |
3385 | else if (rc > 0) | |
6b61353c KH |
3386 | { |
3387 | /* We've scrolled the display. */ | |
3388 | force_p = 1; | |
3389 | changed_p = 1; | |
3390 | } | |
5f5c8ee5 GM |
3391 | } |
3392 | ||
3393 | /* Update the rest of the lines. */ | |
0bc32927 | 3394 | for (; row < end && (force_p || !input_pending); ++row) |
394305db EZ |
3395 | /* scrolling_window resets the enabled_p flag of the rows it |
3396 | reuses from current_matrix. */ | |
b7412313 | 3397 | if (row->enabled_p) |
5f5c8ee5 GM |
3398 | { |
3399 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
3400 | int i; | |
177c0ea7 | 3401 | |
153a073c | 3402 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
3403 | detect_input_pending. If it's done too often, |
3404 | scrolling large windows with repeated scroll-up | |
3405 | commands will too quickly pause redisplay. */ | |
e87b8809 | 3406 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 3407 | detect_input_pending_ignore_squeezables (); |
e876ff42 GM |
3408 | changed_p |= update_window_line (w, vpos, |
3409 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3410 | |
3411 | /* Mark all rows below the last visible one in the current | |
3412 | matrix as invalid. This is necessary because of | |
3413 | variable line heights. Consider the case of three | |
3414 | successive redisplays, where the first displays 5 | |
3415 | lines, the second 3 lines, and the third 5 lines again. | |
3416 | If the second redisplay wouldn't mark rows in the | |
3417 | current matrix invalid, the third redisplay might be | |
3418 | tempted to optimize redisplay based on lines displayed | |
3419 | in the first redisplay. */ | |
3420 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3421 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
3422 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
3423 | } | |
3424 | ||
3425 | /* Was display preempted? */ | |
3426 | paused_p = row < end; | |
177c0ea7 | 3427 | |
56974e03 | 3428 | set_cursor: |
177c0ea7 | 3429 | |
6b61353c KH |
3430 | /* Update the header line after scrolling because a new header |
3431 | line would otherwise overwrite lines at the top of the window | |
3432 | that can be scrolled. */ | |
3433 | if (header_line_row && header_line_row->enabled_p) | |
3434 | { | |
3435 | header_line_row->y = 0; | |
3436 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
6b61353c KH |
3437 | } |
3438 | ||
153a073c | 3439 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
3440 | if (!paused_p && !w->pseudo_window_p) |
3441 | { | |
93e023fc | 3442 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
3443 | if (changed_p && rif->fix_overlapping_area) |
3444 | { | |
3445 | redraw_overlapped_rows (w, yb); | |
3446 | redraw_overlapping_rows (w, yb); | |
3447 | } | |
93e023fc | 3448 | #endif |
177c0ea7 | 3449 | |
5f5c8ee5 GM |
3450 | /* Make cursor visible at cursor position of W. */ |
3451 | set_window_cursor_after_update (w); | |
3452 | ||
e876ff42 GM |
3453 | #if 0 /* Check that current matrix invariants are satisfied. This is |
3454 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
3455 | IF_DEBUG (check_matrix_invariants (w)); |
3456 | #endif | |
4588ec20 | 3457 | } |
5f5c8ee5 | 3458 | |
e509cfa6 | 3459 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
3460 | /* Remember the redisplay method used to display the matrix. */ |
3461 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
3462 | #endif | |
408f5064 | 3463 | |
6b61353c KH |
3464 | #ifdef HAVE_WINDOW_SYSTEM |
3465 | update_window_fringes (w, 0); | |
3466 | #endif | |
3467 | ||
56974e03 GM |
3468 | /* End the update of window W. Don't set the cursor if we |
3469 | paused updating the display because in this case, | |
3470 | set_window_cursor_after_update hasn't been called, and | |
f60e429a | 3471 | W->output_cursor doesn't contain the cursor location. */ |
56974e03 | 3472 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); |
4588ec20 | 3473 | } |
5f5c8ee5 GM |
3474 | else |
3475 | paused_p = 1; | |
3476 | ||
e509cfa6 | 3477 | #ifdef GLYPH_DEBUG |
0cffd9d8 | 3478 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
3479 | add_window_display_history (w, w->current_matrix->method, paused_p); |
3480 | #endif | |
177c0ea7 | 3481 | |
5f5c8ee5 | 3482 | clear_glyph_matrix (desired_matrix); |
408f5064 | 3483 | |
5f5c8ee5 | 3484 | return paused_p; |
4588ec20 JB |
3485 | } |
3486 | ||
b64b3980 | 3487 | |
5f5c8ee5 GM |
3488 | /* Update the display of area AREA in window W, row number VPOS. |
3489 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
3490 | ||
3491 | static void | |
7f780da6 DA |
3492 | update_marginal_area (struct window *w, struct glyph_row *updated_row, |
3493 | enum glyph_row_area area, int vpos) | |
b64b3980 | 3494 | { |
5f5c8ee5 | 3495 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 3496 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 | 3497 | |
5f5c8ee5 GM |
3498 | /* Set cursor to start of glyphs, write them, and clear to the end |
3499 | of the area. I don't think that something more sophisticated is | |
3500 | necessary here, since marginal areas will not be the default. */ | |
f60e429a | 3501 | output_cursor_to (w, vpos, 0, desired_row->y, 0); |
5f5c8ee5 | 3502 | if (desired_row->used[area]) |
7f780da6 DA |
3503 | rif->write_glyphs (w, updated_row, desired_row->glyphs[area], |
3504 | area, desired_row->used[area]); | |
3505 | rif->clear_end_of_line (w, updated_row, area, -1); | |
b64b3980 | 3506 | } |
23b0200c | 3507 | |
352f1545 | 3508 | |
408f5064 | 3509 | /* Update the display of the text area of row VPOS in window W. |
59ea14cd | 3510 | Value is true if display has changed. */ |
5f5c8ee5 | 3511 | |
59ea14cd | 3512 | static bool |
7f780da6 | 3513 | update_text_area (struct window *w, struct glyph_row *updated_row, int vpos) |
23b0200c | 3514 | { |
5f5c8ee5 GM |
3515 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
3516 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3517 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
59ea14cd | 3518 | bool changed_p = 0; |
5f5c8ee5 | 3519 | |
5f5c8ee5 GM |
3520 | /* If rows are at different X or Y, or rows have different height, |
3521 | or the current row is marked invalid, write the entire line. */ | |
3522 | if (!current_row->enabled_p | |
3523 | || desired_row->y != current_row->y | |
3524 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
3525 | || desired_row->phys_ascent != current_row->phys_ascent |
3526 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 3527 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 3528 | || current_row->overlapped_p |
fee8b690 CY |
3529 | /* This next line is necessary for correctly redrawing |
3530 | mouse-face areas after scrolling and other operations. | |
3531 | However, it causes excessive flickering when mouse is moved | |
3532 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
3533 | line doesn't seem to hurt anything. -- cyd. |
3534 | But it is still needed for the header line. -- kfs. */ | |
3535 | || (current_row->mouse_face_p | |
3536 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
3537 | || current_row->x != desired_row->x) |
3538 | { | |
f60e429a | 3539 | output_cursor_to (w, vpos, 0, desired_row->y, desired_row->x); |
177c0ea7 | 3540 | |
5f5c8ee5 | 3541 | if (desired_row->used[TEXT_AREA]) |
7f780da6 DA |
3542 | rif->write_glyphs (w, updated_row, desired_row->glyphs[TEXT_AREA], |
3543 | TEXT_AREA, desired_row->used[TEXT_AREA]); | |
177c0ea7 | 3544 | |
5f5c8ee5 | 3545 | /* Clear to end of window. */ |
7f780da6 | 3546 | rif->clear_end_of_line (w, updated_row, TEXT_AREA, -1); |
408f5064 | 3547 | changed_p = 1; |
60f2f3f1 GM |
3548 | |
3549 | /* This erases the cursor. We do this here because | |
3550 | notice_overwritten_cursor cannot easily check this, which | |
3551 | might indicate that the whole functionality of | |
3552 | notice_overwritten_cursor would better be implemented here. | |
3553 | On the other hand, we need notice_overwritten_cursor as long | |
3554 | as mouse highlighting is done asynchronously outside of | |
3555 | redisplay. */ | |
3556 | if (vpos == w->phys_cursor.vpos) | |
3557 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
3558 | } |
3559 | else | |
3560 | { | |
3561 | int stop, i, x; | |
3562 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
3563 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
59ea14cd | 3564 | bool overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 3565 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
59ea14cd | 3566 | bool abort_skipping = 0; |
5f5c8ee5 | 3567 | |
78897758 YM |
3568 | /* If the desired row extends its face to the text area end, and |
3569 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
3570 | make sure we write at least one glyph, so that the face |
3571 | extension actually takes place. */ | |
78897758 YM |
3572 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
3573 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
3574 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
3575 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 3576 | --desired_stop_pos; |
177c0ea7 | 3577 | |
5f5c8ee5 GM |
3578 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
3579 | i = 0; | |
3580 | x = desired_row->x; | |
8399f8a0 GM |
3581 | |
3582 | /* Loop over glyphs that current and desired row may have | |
3583 | in common. */ | |
5f5c8ee5 | 3584 | while (i < stop) |
352f1545 | 3585 | { |
59ea14cd | 3586 | bool can_skip_p = !abort_skipping; |
177c0ea7 | 3587 | |
5f5c8ee5 | 3588 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
3589 | don't have to be written. We can't skip if the last |
3590 | current glyph overlaps the glyph to its right. For | |
3591 | example, consider a current row of `if ' with the `f' in | |
3592 | Courier bold so that it overlaps the ` ' to its right. | |
3593 | If the desired row is ` ', we would skip over the space | |
3594 | after the `if' and there would remain a pixel from the | |
3595 | `f' on the screen. */ | |
3596 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 3597 | { |
e47306e6 GM |
3598 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
3599 | int left, right; | |
177c0ea7 | 3600 | |
d3d50620 | 3601 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
e47306e6 | 3602 | &left, &right); |
91d227d9 | 3603 | can_skip_p = (right == 0 && !abort_skipping); |
352f1545 | 3604 | } |
177c0ea7 | 3605 | |
6d950f4c | 3606 | if (can_skip_p) |
352f1545 | 3607 | { |
91d227d9 CY |
3608 | int start_hpos = i; |
3609 | ||
6d950f4c GM |
3610 | while (i < stop |
3611 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
3612 | { | |
3613 | x += desired_glyph->pixel_width; | |
3614 | ++desired_glyph, ++current_glyph, ++i; | |
3615 | } | |
3616 | ||
3617 | /* Consider the case that the current row contains "xxx | |
3618 | ppp ggg" in italic Courier font, and the desired row | |
3619 | is "xxx ggg". The character `p' has lbearing, `g' | |
3620 | has not. The loop above will stop in front of the | |
3621 | first `p' in the current row. If we would start | |
3622 | writing glyphs there, we wouldn't erase the lbearing | |
3623 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 3624 | taken care of by draw_glyphs. */ |
6d950f4c GM |
3625 | if (overlapping_glyphs_p |
3626 | && i > 0 | |
3627 | && i < current_row->used[TEXT_AREA] | |
3628 | && (current_row->used[TEXT_AREA] | |
3629 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 3630 | { |
6d950f4c | 3631 | int left, right; |
177c0ea7 | 3632 | |
3a45383a | 3633 | rif->get_glyph_overhangs (current_glyph, |
d3d50620 | 3634 | XFRAME (w->frame), |
6d950f4c GM |
3635 | &left, &right); |
3636 | while (left > 0 && i > 0) | |
3637 | { | |
3638 | --i, --desired_glyph, --current_glyph; | |
3639 | x -= desired_glyph->pixel_width; | |
3640 | left -= desired_glyph->pixel_width; | |
3641 | } | |
91d227d9 CY |
3642 | |
3643 | /* Abort the skipping algorithm if we end up before | |
3644 | our starting point, to avoid looping (bug#1070). | |
3645 | This can happen when the lbearing is larger than | |
3646 | the pixel width. */ | |
3647 | abort_skipping = (i < start_hpos); | |
5f5c8ee5 | 3648 | } |
352f1545 | 3649 | } |
177c0ea7 | 3650 | |
5f5c8ee5 GM |
3651 | /* Try to avoid writing the entire rest of the desired row |
3652 | by looking for a resync point. This mainly prevents | |
3653 | mode line flickering in the case the mode line is in | |
3654 | fixed-pitch font, which it usually will be. */ | |
3655 | if (i < desired_row->used[TEXT_AREA]) | |
3656 | { | |
3657 | int start_x = x, start_hpos = i; | |
3658 | struct glyph *start = desired_glyph; | |
3659 | int current_x = x; | |
59ea14cd | 3660 | bool skip_first_p = !can_skip_p; |
6d950f4c | 3661 | |
5f5c8ee5 GM |
3662 | /* Find the next glyph that's equal again. */ |
3663 | while (i < stop | |
6d950f4c GM |
3664 | && (skip_first_p |
3665 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
3666 | && x == current_x) |
3667 | { | |
3668 | x += desired_glyph->pixel_width; | |
3669 | current_x += current_glyph->pixel_width; | |
3670 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 3671 | skip_first_p = 0; |
5f5c8ee5 | 3672 | } |
23b0200c | 3673 | |
5f5c8ee5 GM |
3674 | if (i == start_hpos || x != current_x) |
3675 | { | |
3676 | i = start_hpos; | |
3677 | x = start_x; | |
3678 | desired_glyph = start; | |
3679 | break; | |
3680 | } | |
e47306e6 | 3681 | |
f60e429a | 3682 | output_cursor_to (w, vpos, start_hpos, desired_row->y, start_x); |
7f780da6 DA |
3683 | rif->write_glyphs (w, updated_row, start, |
3684 | TEXT_AREA, i - start_hpos); | |
408f5064 | 3685 | changed_p = 1; |
5f5c8ee5 GM |
3686 | } |
3687 | } | |
177c0ea7 | 3688 | |
5f5c8ee5 GM |
3689 | /* Write the rest. */ |
3690 | if (i < desired_row->used[TEXT_AREA]) | |
3691 | { | |
f60e429a | 3692 | output_cursor_to (w, vpos, i, desired_row->y, x); |
7f780da6 DA |
3693 | rif->write_glyphs (w, updated_row, desired_glyph, |
3694 | TEXT_AREA, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 3695 | changed_p = 1; |
5f5c8ee5 | 3696 | } |
177c0ea7 | 3697 | |
5f5c8ee5 GM |
3698 | /* Maybe clear to end of line. */ |
3699 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
3700 | { | |
3701 | /* If new row extends to the end of the text area, nothing | |
3702 | has to be cleared, if and only if we did a write_glyphs | |
3703 | above. This is made sure by setting desired_stop_pos | |
3704 | appropriately above. */ | |
a54e2c05 | 3705 | eassert (i < desired_row->used[TEXT_AREA] |
78897758 YM |
3706 | || ((desired_row->used[TEXT_AREA] |
3707 | == current_row->used[TEXT_AREA]) | |
3708 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
3709 | } |
3710 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
3711 | { | |
3712 | /* If old row extends to the end of the text area, clear. */ | |
3713 | if (i >= desired_row->used[TEXT_AREA]) | |
f60e429a DA |
3714 | output_cursor_to (w, vpos, i, desired_row->y, |
3715 | desired_row->pixel_width); | |
7f780da6 | 3716 | rif->clear_end_of_line (w, updated_row, TEXT_AREA, -1); |
408f5064 | 3717 | changed_p = 1; |
5f5c8ee5 GM |
3718 | } |
3719 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 3720 | { |
5f5c8ee5 GM |
3721 | /* Otherwise clear to the end of the old row. Everything |
3722 | after that position should be clear already. */ | |
27786b2f | 3723 | int xlim; |
177c0ea7 | 3724 | |
5f5c8ee5 | 3725 | if (i >= desired_row->used[TEXT_AREA]) |
f60e429a DA |
3726 | output_cursor_to (w, vpos, i, desired_row->y, |
3727 | desired_row->pixel_width); | |
5f5c8ee5 GM |
3728 | |
3729 | /* If cursor is displayed at the end of the line, make sure | |
3730 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
3731 | with which to erase the cursor (because this method | |
3732 | doesn't work with lbearing/rbearing), so we must do it | |
3733 | this way. */ | |
3734 | if (vpos == w->phys_cursor.vpos | |
f951a506 EZ |
3735 | && (desired_row->reversed_p |
3736 | ? (w->phys_cursor.hpos < 0) | |
3737 | : (w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]))) | |
5f5c8ee5 GM |
3738 | { |
3739 | w->phys_cursor_on_p = 0; | |
27786b2f | 3740 | xlim = -1; |
5f5c8ee5 GM |
3741 | } |
3742 | else | |
27786b2f | 3743 | xlim = current_row->pixel_width; |
7f780da6 | 3744 | rif->clear_end_of_line (w, updated_row, TEXT_AREA, xlim); |
408f5064 | 3745 | changed_p = 1; |
2e8907d3 | 3746 | } |
23b0200c | 3747 | } |
408f5064 GM |
3748 | |
3749 | return changed_p; | |
23b0200c | 3750 | } |
4588ec20 | 3751 | |
5f5c8ee5 | 3752 | |
59ea14cd | 3753 | /* Update row VPOS in window W. Value is true if display has been changed. */ |
5f5c8ee5 | 3754 | |
59ea14cd PE |
3755 | static bool |
3756 | update_window_line (struct window *w, int vpos, bool *mouse_face_overwritten_p) | |
5f5c8ee5 GM |
3757 | { |
3758 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
3759 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3760 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
59ea14cd | 3761 | bool changed_p = 0; |
5f5c8ee5 | 3762 | |
177c0ea7 JB |
3763 | /* A row can be completely invisible in case a desired matrix was |
3764 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
3765 | the matrix. Make sure to make such rows current anyway, since |
3766 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
3767 | if (desired_row->mode_line_p |
3768 | || desired_row->visible_height > 0) | |
408f5064 | 3769 | { |
a54e2c05 | 3770 | eassert (desired_row->enabled_p); |
504805ac GM |
3771 | |
3772 | /* Update display of the left margin area, if there is one. */ | |
eeaf9bf3 | 3773 | if (!desired_row->full_width_p && w->left_margin_cols > 0) |
504805ac GM |
3774 | { |
3775 | changed_p = 1; | |
7f780da6 | 3776 | update_marginal_area (w, desired_row, LEFT_MARGIN_AREA, vpos); |
e9957956 EZ |
3777 | /* Setting this flag will ensure the vertical border, if |
3778 | any, between this window and the one on its left will be | |
3779 | redrawn. This is necessary because updating the left | |
3780 | margin area can potentially draw over the border. */ | |
3781 | current_row->redraw_fringe_bitmaps_p = 1; | |
504805ac | 3782 | } |
177c0ea7 | 3783 | |
504805ac | 3784 | /* Update the display of the text area. */ |
7f780da6 | 3785 | if (update_text_area (w, desired_row, vpos)) |
504805ac GM |
3786 | { |
3787 | changed_p = 1; | |
3788 | if (current_row->mouse_face_p) | |
3789 | *mouse_face_overwritten_p = 1; | |
3790 | } | |
177c0ea7 | 3791 | |
504805ac | 3792 | /* Update display of the right margin area, if there is one. */ |
eeaf9bf3 | 3793 | if (!desired_row->full_width_p && w->right_margin_cols > 0) |
504805ac GM |
3794 | { |
3795 | changed_p = 1; | |
7f780da6 | 3796 | update_marginal_area (w, desired_row, RIGHT_MARGIN_AREA, vpos); |
504805ac | 3797 | } |
177c0ea7 | 3798 | |
504805ac GM |
3799 | /* Draw truncation marks etc. */ |
3800 | if (!current_row->enabled_p | |
3801 | || desired_row->y != current_row->y | |
3802 | || desired_row->visible_height != current_row->visible_height | |
6b61353c | 3803 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 3804 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
6b61353c | 3805 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 3806 | || desired_row->mode_line_p != current_row->mode_line_p |
6b61353c | 3807 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
3808 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
3809 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
65620264 | 3810 | rif->after_update_window_line_hook (w, desired_row); |
408f5064 | 3811 | } |
177c0ea7 | 3812 | |
5f5c8ee5 GM |
3813 | /* Update current_row from desired_row. */ |
3814 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
408f5064 | 3815 | return changed_p; |
5f5c8ee5 GM |
3816 | } |
3817 | ||
3818 | ||
3819 | /* Set the cursor after an update of window W. This function may only | |
3820 | be called from update_window. */ | |
3821 | ||
3822 | static void | |
971de7fb | 3823 | set_window_cursor_after_update (struct window *w) |
4588ec20 | 3824 | { |
d3d50620 | 3825 | struct frame *f = XFRAME (w->frame); |
5f5c8ee5 GM |
3826 | int cx, cy, vpos, hpos; |
3827 | ||
3828 | /* Not intended for frame matrix updates. */ | |
a54e2c05 | 3829 | eassert (FRAME_WINDOW_P (f)); |
177c0ea7 | 3830 | |
b96fd3e8 GM |
3831 | if (cursor_in_echo_area |
3832 | && !NILP (echo_area_buffer[0]) | |
3833 | /* If we are showing a message instead of the mini-buffer, | |
3834 | show the cursor for the message instead. */ | |
3835 | && XWINDOW (minibuf_window) == w | |
3836 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
3837 | /* These cases apply only to the frame that contains |
3838 | the active mini-buffer window. */ | |
3839 | && FRAME_HAS_MINIBUF_P (f) | |
3840 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
3841 | { | |
3842 | cx = cy = vpos = hpos = 0; | |
3843 | ||
3844 | if (cursor_in_echo_area >= 0) | |
3845 | { | |
3846 | /* If the mini-buffer is several lines high, find the last | |
3847 | line that has any text on it. Note: either all lines | |
3848 | are enabled or none. Otherwise we wouldn't be able to | |
3849 | determine Y. */ | |
862b4790 GM |
3850 | struct glyph_row *row, *last_row; |
3851 | struct glyph *glyph; | |
3852 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 3853 | |
862b4790 | 3854 | last_row = NULL; |
6206f8ce GM |
3855 | row = w->current_matrix->rows; |
3856 | while (row->enabled_p | |
3857 | && (last_row == NULL | |
3858 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 3859 | { |
862b4790 GM |
3860 | if (row->used[TEXT_AREA] |
3861 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
3862 | last_row = row; | |
6206f8ce | 3863 | ++row; |
862b4790 | 3864 | } |
177c0ea7 | 3865 | |
5f5c8ee5 GM |
3866 | if (last_row) |
3867 | { | |
6206f8ce GM |
3868 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
3869 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 3870 | |
b96fd3e8 | 3871 | while (last > start && last->charpos < 0) |
862b4790 | 3872 | --last; |
177c0ea7 | 3873 | |
862b4790 GM |
3874 | for (glyph = start; glyph < last; ++glyph) |
3875 | { | |
3876 | cx += glyph->pixel_width; | |
3877 | ++hpos; | |
3878 | } | |
3879 | ||
5f5c8ee5 | 3880 | cy = last_row->y; |
862b4790 | 3881 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
3882 | } |
3883 | } | |
3884 | } | |
3885 | else | |
3886 | { | |
3887 | cx = w->cursor.x; | |
3888 | cy = w->cursor.y; | |
3889 | hpos = w->cursor.hpos; | |
3890 | vpos = w->cursor.vpos; | |
3891 | } | |
4588ec20 | 3892 | |
2dd61a9b | 3893 | /* Window cursor can be out of sync for horizontally split windows. |
cccaebd2 | 3894 | Horizontal position is -1 when cursor is on the left fringe. */ |
2dd61a9b DA |
3895 | hpos = clip_to_bounds (-1, hpos, w->current_matrix->matrix_w - 1); |
3896 | vpos = clip_to_bounds (0, vpos, w->current_matrix->nrows - 1); | |
f60e429a | 3897 | output_cursor_to (w, vpos, hpos, cy, cx); |
4588ec20 | 3898 | } |
4588ec20 | 3899 | |
5f5c8ee5 | 3900 | |
44ad1cf7 SM |
3901 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in |
3902 | the window tree rooted at W. */ | |
6df5d75f | 3903 | |
44ad1cf7 SM |
3904 | static void |
3905 | set_window_update_flags (struct window *w, bool on_p) | |
6df5d75f GM |
3906 | { |
3907 | while (w) | |
3908 | { | |
e74aeda8 | 3909 | if (WINDOWP (w->contents)) |
44ad1cf7 SM |
3910 | set_window_update_flags (XWINDOW (w->contents), on_p); |
3911 | else | |
6df5d75f GM |
3912 | w->must_be_updated_p = on_p; |
3913 | ||
d3d50620 | 3914 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
6df5d75f | 3915 | } |
177c0ea7 | 3916 | } |
6df5d75f GM |
3917 | |
3918 | ||
3919 | \f | |
3920 | /*********************************************************************** | |
3921 | Window-Based Scrolling | |
3922 | ***********************************************************************/ | |
3923 | ||
3924 | /* Structure describing rows in scrolling_window. */ | |
3925 | ||
3926 | struct row_entry | |
3927 | { | |
3928 | /* Number of occurrences of this row in desired and current matrix. */ | |
3929 | int old_uses, new_uses; | |
177c0ea7 | 3930 | |
6df5d75f GM |
3931 | /* Vpos of row in new matrix. */ |
3932 | int new_line_number; | |
3933 | ||
3934 | /* Bucket index of this row_entry in the hash table row_table. */ | |
ca9ce8f2 | 3935 | ptrdiff_t bucket; |
177c0ea7 | 3936 | |
6df5d75f GM |
3937 | /* The row described by this entry. */ |
3938 | struct glyph_row *row; | |
177c0ea7 | 3939 | |
6df5d75f GM |
3940 | /* Hash collision chain. */ |
3941 | struct row_entry *next; | |
3942 | }; | |
3943 | ||
3944 | /* A pool to allocate row_entry structures from, and the size of the | |
3945 | pool. The pool is reallocated in scrolling_window when we find | |
3946 | that we need a larger one. */ | |
3947 | ||
3948 | static struct row_entry *row_entry_pool; | |
ca9ce8f2 | 3949 | static ptrdiff_t row_entry_pool_size; |
6df5d75f GM |
3950 | |
3951 | /* Index of next free entry in row_entry_pool. */ | |
3952 | ||
ca9ce8f2 | 3953 | static ptrdiff_t row_entry_idx; |
6df5d75f GM |
3954 | |
3955 | /* The hash table used during scrolling, and the table's size. This | |
3956 | table is used to quickly identify equal rows in the desired and | |
3957 | current matrix. */ | |
3958 | ||
3959 | static struct row_entry **row_table; | |
ca9ce8f2 | 3960 | static ptrdiff_t row_table_size; |
6df5d75f GM |
3961 | |
3962 | /* Vectors of pointers to row_entry structures belonging to the | |
3963 | current and desired matrix, and the size of the vectors. */ | |
3964 | ||
3965 | static struct row_entry **old_lines, **new_lines; | |
0065d054 | 3966 | static ptrdiff_t old_lines_size, new_lines_size; |
6df5d75f GM |
3967 | |
3968 | /* A pool to allocate run structures from, and its size. */ | |
3969 | ||
3970 | static struct run *run_pool; | |
0065d054 | 3971 | static ptrdiff_t runs_size; |
6df5d75f GM |
3972 | |
3973 | /* A vector of runs of lines found during scrolling. */ | |
3974 | ||
3975 | static struct run **runs; | |
3976 | ||
6b1f9ba4 | 3977 | /* Add glyph row ROW to the scrolling hash table. */ |
6df5d75f | 3978 | |
b0ab8123 | 3979 | static struct row_entry * |
6b1f9ba4 | 3980 | add_row_entry (struct glyph_row *row) |
6df5d75f GM |
3981 | { |
3982 | struct row_entry *entry; | |
ca9ce8f2 | 3983 | ptrdiff_t i = row->hash % row_table_size; |
177c0ea7 | 3984 | |
6df5d75f | 3985 | entry = row_table[i]; |
a54e2c05 | 3986 | eassert (entry || verify_row_hash (row)); |
6b1f9ba4 | 3987 | while (entry && !row_equal_p (entry->row, row, 1)) |
6df5d75f | 3988 | entry = entry->next; |
177c0ea7 | 3989 | |
6df5d75f GM |
3990 | if (entry == NULL) |
3991 | { | |
3992 | entry = row_entry_pool + row_entry_idx++; | |
3993 | entry->row = row; | |
3994 | entry->old_uses = entry->new_uses = 0; | |
3995 | entry->new_line_number = 0; | |
3996 | entry->bucket = i; | |
3997 | entry->next = row_table[i]; | |
3998 | row_table[i] = entry; | |
3999 | } | |
4000 | ||
4001 | return entry; | |
4002 | } | |
4003 | ||
4004 | ||
5f5c8ee5 | 4005 | /* Try to reuse part of the current display of W by scrolling lines. |
59ea14cd | 4006 | HEADER_LINE_P means W has a header line. |
5f5c8ee5 GM |
4007 | |
4008 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4009 | Technique for Isolating Differences Between Files." It should take | |
4010 | O(N) time. | |
4011 | ||
4012 | A short outline of the steps of the algorithm | |
4013 | ||
4014 | 1. Skip lines equal at the start and end of both matrices. | |
4015 | ||
4016 | 2. Enter rows in the current and desired matrix into a symbol | |
4017 | table, counting how often they appear in both matrices. | |
4018 | ||
4019 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4020 | i.e. we assume that such lines are likely to have been moved. | |
4021 | ||
4022 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4023 | forward and backward. | |
4024 | ||
4025 | Value is | |
4026 | ||
4027 | -1 if all rows were found to be equal. | |
4028 | 0 to indicate that we did not scroll the display, or | |
4029 | 1 if we did scroll. */ | |
4030 | ||
4031 | static int | |
59ea14cd | 4032 | scrolling_window (struct window *w, bool header_line_p) |
4588ec20 | 4033 | { |
5f5c8ee5 GM |
4034 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4035 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4036 | int yb = window_text_bottom_y (w); | |
ca9ce8f2 PE |
4037 | ptrdiff_t i; |
4038 | int j, first_old, first_new, last_old, last_new; | |
4039 | int nruns, run_idx; | |
0065d054 | 4040 | ptrdiff_t n; |
6df5d75f | 4041 | struct row_entry *entry; |
fa971ac3 | 4042 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4043 | |
4044 | /* Skip over rows equal at the start. */ | |
59ea14cd | 4045 | for (i = header_line_p; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4046 | { |
bfdcafe1 GM |
4047 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4048 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4049 | ||
4050 | if (c->enabled_p | |
4051 | && d->enabled_p | |
6b61353c | 4052 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4053 | && c->y == d->y |
4054 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4055 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
6b1f9ba4 | 4056 | && row_equal_p (c, d, 1)) |
bfdcafe1 GM |
4057 | { |
4058 | assign_row (c, d); | |
4059 | d->enabled_p = 0; | |
4060 | } | |
4061 | else | |
4062 | break; | |
5f5c8ee5 | 4063 | } |
4588ec20 | 4064 | |
5f5c8ee5 GM |
4065 | /* Give up if some rows in the desired matrix are not enabled. */ |
4066 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4067 | return -1; | |
177c0ea7 | 4068 | |
5f5c8ee5 GM |
4069 | first_old = first_new = i; |
4070 | ||
4d8ade89 YM |
4071 | /* Set last_new to the index + 1 of the row that reaches the |
4072 | bottom boundary in the desired matrix. Give up if we find a | |
4073 | disabled row before we reach the bottom boundary. */ | |
5f5c8ee5 | 4074 | i = first_new + 1; |
4d8ade89 YM |
4075 | while (i < desired_matrix->nrows - 1) |
4076 | { | |
4077 | int bottom; | |
5f5c8ee5 | 4078 | |
4d8ade89 YM |
4079 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) |
4080 | return 0; | |
4081 | bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)); | |
4082 | if (bottom <= yb) | |
4083 | ++i; | |
4084 | if (bottom >= yb) | |
4085 | break; | |
4086 | } | |
5f5c8ee5 GM |
4087 | |
4088 | last_new = i; | |
4089 | ||
4d8ade89 YM |
4090 | /* Set last_old to the index + 1 of the row that reaches the bottom |
4091 | boundary in the current matrix. We don't look at the enabled | |
4092 | flag here because we plan to reuse part of the display even if | |
4093 | other parts are disabled. */ | |
5f5c8ee5 | 4094 | i = first_old + 1; |
93962bfa GM |
4095 | while (i < current_matrix->nrows - 1) |
4096 | { | |
4097 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4098 | if (bottom <= yb) | |
4099 | ++i; | |
4100 | if (bottom >= yb) | |
4101 | break; | |
4102 | } | |
4103 | ||
5f5c8ee5 GM |
4104 | last_old = i; |
4105 | ||
4106 | /* Skip over rows equal at the bottom. */ | |
4107 | i = last_new; | |
4108 | j = last_old; | |
4109 | while (i - 1 > first_new | |
4110 | && j - 1 > first_old | |
1e5b2111 EZ |
4111 | && MATRIX_ROW (current_matrix, j - 1)->enabled_p |
4112 | && (MATRIX_ROW (current_matrix, j - 1)->y | |
4113 | == MATRIX_ROW (desired_matrix, i - 1)->y) | |
4114 | && !MATRIX_ROW (desired_matrix, i - 1)->redraw_fringe_bitmaps_p | |
6b1f9ba4 | 4115 | && row_equal_p (MATRIX_ROW (desired_matrix, i - 1), |
e4e0bee9 | 4116 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
4117 | --i, --j; |
4118 | last_new = i; | |
4119 | last_old = j; | |
4120 | ||
4121 | /* Nothing to do if all rows are equal. */ | |
4122 | if (last_new == first_new) | |
4123 | return 0; | |
4124 | ||
0065d054 | 4125 | /* Check for integer overflow in size calculation. |
ca9ce8f2 PE |
4126 | |
4127 | If next_almost_prime checks (N) for divisibility by 2..10, then | |
4128 | it can return at most N + 10, e.g., next_almost_prime (1) == 11. | |
4129 | So, set next_almost_prime_increment_max to 10. | |
4130 | ||
4131 | It's just a coincidence that next_almost_prime_increment_max == | |
4132 | NEXT_ALMOST_PRIME_LIMIT - 1. If NEXT_ALMOST_PRIME_LIMIT were | |
4133 | 13, then next_almost_prime_increment_max would be 14, e.g., | |
4134 | because next_almost_prime (113) would be 127. */ | |
4135 | { | |
4136 | verify (NEXT_ALMOST_PRIME_LIMIT == 11); | |
4137 | enum { next_almost_prime_increment_max = 10 }; | |
ca9ce8f2 | 4138 | ptrdiff_t row_table_max = |
0065d054 PE |
4139 | (min (PTRDIFF_MAX, SIZE_MAX) / (3 * sizeof *row_table) |
4140 | - next_almost_prime_increment_max); | |
4141 | ptrdiff_t current_nrows_max = row_table_max - desired_matrix->nrows; | |
4142 | if (current_nrows_max < current_matrix->nrows) | |
ca9ce8f2 PE |
4143 | memory_full (SIZE_MAX); |
4144 | } | |
4145 | ||
6df5d75f | 4146 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 4147 | |
6df5d75f | 4148 | if (current_matrix->nrows > old_lines_size) |
0065d054 PE |
4149 | old_lines = xpalloc (old_lines, &old_lines_size, |
4150 | current_matrix->nrows - old_lines_size, | |
4151 | INT_MAX, sizeof *old_lines); | |
177c0ea7 | 4152 | |
6df5d75f | 4153 | if (desired_matrix->nrows > new_lines_size) |
0065d054 PE |
4154 | new_lines = xpalloc (new_lines, &new_lines_size, |
4155 | desired_matrix->nrows - new_lines_size, | |
4156 | INT_MAX, sizeof *new_lines); | |
6df5d75f | 4157 | |
ca9ce8f2 PE |
4158 | n = desired_matrix->nrows; |
4159 | n += current_matrix->nrows; | |
0065d054 | 4160 | if (row_table_size < 3 * n) |
6df5d75f | 4161 | { |
ca9ce8f2 | 4162 | ptrdiff_t size = next_almost_prime (3 * n); |
0065d054 | 4163 | row_table = xnrealloc (row_table, size, sizeof *row_table); |
ca9ce8f2 | 4164 | row_table_size = size; |
0065d054 | 4165 | memset (row_table, 0, size * sizeof *row_table); |
6df5d75f GM |
4166 | } |
4167 | ||
4168 | if (n > row_entry_pool_size) | |
0065d054 PE |
4169 | row_entry_pool = xpalloc (row_entry_pool, &row_entry_pool_size, |
4170 | n - row_entry_pool_size, | |
4171 | -1, sizeof *row_entry_pool); | |
6df5d75f GM |
4172 | |
4173 | if (desired_matrix->nrows > runs_size) | |
4174 | { | |
0065d054 PE |
4175 | runs = xnrealloc (runs, desired_matrix->nrows, sizeof *runs); |
4176 | run_pool = xnrealloc (run_pool, desired_matrix->nrows, sizeof *run_pool); | |
ca9ce8f2 | 4177 | runs_size = desired_matrix->nrows; |
6df5d75f GM |
4178 | } |
4179 | ||
4180 | nruns = run_idx = 0; | |
4181 | row_entry_idx = 0; | |
4182 | ||
4183 | /* Add rows from the current and desired matrix to the hash table | |
4184 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 4185 | |
5f5c8ee5 GM |
4186 | for (i = first_old; i < last_old; ++i) |
4187 | { | |
4188 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
4189 | { | |
6b1f9ba4 | 4190 | entry = add_row_entry (MATRIX_ROW (current_matrix, i)); |
6df5d75f GM |
4191 | old_lines[i] = entry; |
4192 | ++entry->old_uses; | |
5f5c8ee5 GM |
4193 | } |
4194 | else | |
6df5d75f | 4195 | old_lines[i] = NULL; |
5f5c8ee5 GM |
4196 | } |
4197 | ||
5f5c8ee5 GM |
4198 | for (i = first_new; i < last_new; ++i) |
4199 | { | |
a54e2c05 | 4200 | eassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); |
6b1f9ba4 | 4201 | entry = add_row_entry (MATRIX_ROW (desired_matrix, i)); |
6df5d75f GM |
4202 | ++entry->new_uses; |
4203 | entry->new_line_number = i; | |
4204 | new_lines[i] = entry; | |
5f5c8ee5 | 4205 | } |
4588ec20 | 4206 | |
5f5c8ee5 GM |
4207 | /* Identify moves based on lines that are unique and equal |
4208 | in both matrices. */ | |
4209 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
4210 | if (old_lines[i] |
4211 | && old_lines[i]->old_uses == 1 | |
4212 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 | 4213 | { |
27786b2f | 4214 | int p, q; |
6df5d75f GM |
4215 | int new_line = old_lines[i]->new_line_number; |
4216 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
4217 | |
4218 | /* Record move. */ | |
4219 | run->current_vpos = i; | |
4220 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
4221 | run->desired_vpos = new_line; | |
4222 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
4223 | run->nrows = 1; | |
4224 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
4225 | ||
4226 | /* Extend backward. */ | |
27786b2f PE |
4227 | p = i - 1; |
4228 | q = new_line - 1; | |
4229 | while (p > first_old | |
4230 | && q > first_new | |
4231 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4232 | { |
27786b2f | 4233 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 JB |
4234 | --run->current_vpos; |
4235 | --run->desired_vpos; | |
5f5c8ee5 GM |
4236 | ++run->nrows; |
4237 | run->height += h; | |
4238 | run->desired_y -= h; | |
4239 | run->current_y -= h; | |
27786b2f | 4240 | --p, --q; |
5f5c8ee5 | 4241 | } |
4588ec20 | 4242 | |
5f5c8ee5 | 4243 | /* Extend forward. */ |
27786b2f PE |
4244 | p = i + 1; |
4245 | q = new_line + 1; | |
4246 | while (p < last_old | |
4247 | && q < last_new | |
4248 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4249 | { |
27786b2f | 4250 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 | 4251 | ++run->nrows; |
5f5c8ee5 | 4252 | run->height += h; |
27786b2f | 4253 | ++p, ++q; |
5f5c8ee5 | 4254 | } |
19dff8dc | 4255 | |
5f5c8ee5 GM |
4256 | /* Insert run into list of all runs. Order runs by copied |
4257 | pixel lines. Note that we record runs that don't have to | |
4258 | be copied because they are already in place. This is done | |
4259 | because we can avoid calling update_window_line in this | |
4260 | case. */ | |
27786b2f | 4261 | for (p = 0; p < nruns && runs[p]->height > run->height; ++p) |
5f5c8ee5 | 4262 | ; |
27786b2f PE |
4263 | for (q = nruns; q > p; --q) |
4264 | runs[q] = runs[q - 1]; | |
4265 | runs[p] = run; | |
5f5c8ee5 GM |
4266 | ++nruns; |
4267 | ||
4268 | i += run->nrows; | |
4269 | } | |
4270 | else | |
4271 | ++i; | |
4588ec20 | 4272 | |
5f5c8ee5 GM |
4273 | /* Do the moves. Do it in a way that we don't overwrite something |
4274 | we want to copy later on. This is not solvable in general | |
4275 | because there is only one display and we don't have a way to | |
4276 | exchange areas on this display. Example: | |
4588ec20 | 4277 | |
5f5c8ee5 GM |
4278 | +-----------+ +-----------+ |
4279 | | A | | B | | |
4280 | +-----------+ --> +-----------+ | |
4281 | | B | | A | | |
4282 | +-----------+ +-----------+ | |
4588ec20 | 4283 | |
5f5c8ee5 GM |
4284 | Instead, prefer bigger moves, and invalidate moves that would |
4285 | copy from where we copied to. */ | |
ea0d86af | 4286 | |
5f5c8ee5 GM |
4287 | for (i = 0; i < nruns; ++i) |
4288 | if (runs[i]->nrows > 0) | |
4289 | { | |
4290 | struct run *r = runs[i]; | |
24e86043 | 4291 | |
5f5c8ee5 GM |
4292 | /* Copy on the display. */ |
4293 | if (r->current_y != r->desired_y) | |
4294 | { | |
989b42d2 | 4295 | rif->clear_window_mouse_face (w); |
5f5c8ee5 | 4296 | rif->scroll_run_hook (w, r); |
1305621b | 4297 | } |
5f5c8ee5 | 4298 | |
1305621b YM |
4299 | /* Truncate runs that copy to where we copied to, and |
4300 | invalidate runs that copy from where we copied to. */ | |
4301 | for (j = nruns - 1; j > i; --j) | |
4302 | { | |
4303 | struct run *p = runs[j]; | |
59ea14cd | 4304 | bool truncated_p = 0; |
5f5c8ee5 | 4305 | |
1305621b YM |
4306 | if (p->nrows > 0 |
4307 | && p->desired_y < r->desired_y + r->height | |
4308 | && p->desired_y + p->height > r->desired_y) | |
5f5c8ee5 | 4309 | { |
1305621b YM |
4310 | if (p->desired_y < r->desired_y) |
4311 | { | |
4312 | p->nrows = r->desired_vpos - p->desired_vpos; | |
4313 | p->height = r->desired_y - p->desired_y; | |
4314 | truncated_p = 1; | |
4315 | } | |
4316 | else | |
4317 | { | |
4318 | int nrows_copied = (r->desired_vpos + r->nrows | |
4319 | - p->desired_vpos); | |
4320 | ||
4321 | if (p->nrows <= nrows_copied) | |
4322 | p->nrows = 0; | |
4323 | else | |
4324 | { | |
4325 | int height_copied = (r->desired_y + r->height | |
4326 | - p->desired_y); | |
4327 | ||
4328 | p->current_vpos += nrows_copied; | |
4329 | p->desired_vpos += nrows_copied; | |
4330 | p->nrows -= nrows_copied; | |
4331 | p->current_y += height_copied; | |
4332 | p->desired_y += height_copied; | |
4333 | p->height -= height_copied; | |
4334 | truncated_p = 1; | |
4335 | } | |
4336 | } | |
4337 | } | |
177c0ea7 | 4338 | |
1305621b YM |
4339 | if (r->current_y != r->desired_y |
4340 | /* The condition below is equivalent to | |
4341 | ((p->current_y >= r->desired_y | |
5f5c8ee5 | 4342 | && p->current_y < r->desired_y + r->height) |
1305621b | 4343 | || (p->current_y + p->height > r->desired_y |
5f5c8ee5 | 4344 | && (p->current_y + p->height |
1305621b YM |
4345 | <= r->desired_y + r->height))) |
4346 | because we have 0 < p->height <= r->height. */ | |
4347 | && p->current_y < r->desired_y + r->height | |
4348 | && p->current_y + p->height > r->desired_y) | |
4349 | p->nrows = 0; | |
4350 | ||
4351 | /* Reorder runs by copied pixel lines if truncated. */ | |
4352 | if (truncated_p && p->nrows > 0) | |
4353 | { | |
4354 | int k = nruns - 1; | |
4355 | ||
4356 | while (runs[k]->nrows == 0 || runs[k]->height < p->height) | |
4357 | k--; | |
4358 | memmove (runs + j, runs + j + 1, (k - j) * sizeof (*runs)); | |
4359 | runs[k] = p; | |
5f5c8ee5 GM |
4360 | } |
4361 | } | |
ea0d86af | 4362 | |
5f5c8ee5 GM |
4363 | /* Assign matrix rows. */ |
4364 | for (j = 0; j < r->nrows; ++j) | |
4365 | { | |
4366 | struct glyph_row *from, *to; | |
59ea14cd | 4367 | bool to_overlapped_p; |
e876ff42 | 4368 | |
5f5c8ee5 GM |
4369 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
4370 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 4371 | to_overlapped_p = to->overlapped_p; |
e61124cd | 4372 | from->redraw_fringe_bitmaps_p = from->fringe_bitmap_periodic_p; |
5f5c8ee5 | 4373 | assign_row (to, from); |
1305621b YM |
4374 | /* The above `assign_row' actually does swap, so if we had |
4375 | an overlap in the copy destination of two runs, then | |
4376 | the second run would assign a previously disabled bogus | |
4377 | row. But thanks to the truncation code in the | |
4378 | preceding for-loop, we no longer have such an overlap, | |
4379 | and thus the assigned row should always be enabled. */ | |
a54e2c05 | 4380 | eassert (to->enabled_p); |
1305621b | 4381 | from->enabled_p = 0; |
408f5064 | 4382 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
4383 | } |
4384 | } | |
15874c59 | 4385 | |
6df5d75f GM |
4386 | /* Clear the hash table, for the next time. */ |
4387 | for (i = 0; i < row_entry_idx; ++i) | |
4388 | row_table[row_entry_pool[i].bucket] = NULL; | |
4389 | ||
aec1708a | 4390 | /* Value is 1 to indicate that we scrolled the display. */ |
908589fd | 4391 | return nruns > 0; |
5f5c8ee5 | 4392 | } |
de83c314 | 4393 | |
15874c59 | 4394 | |
4588ec20 | 4395 | \f |
5f5c8ee5 GM |
4396 | /************************************************************************ |
4397 | Frame-Based Updates | |
4398 | ************************************************************************/ | |
4588ec20 | 4399 | |
5f5c8ee5 | 4400 | /* Update the desired frame matrix of frame F. |
4588ec20 | 4401 | |
59ea14cd PE |
4402 | FORCE_P means that the update should not be stopped by pending input. |
4403 | INHIBIT_HAIRY_ID_P means that scrolling should not be tried. | |
5f5c8ee5 | 4404 | |
59ea14cd | 4405 | Value is true if update was stopped due to pending input. */ |
5f5c8ee5 | 4406 | |
59ea14cd PE |
4407 | static bool |
4408 | update_frame_1 (struct frame *f, bool force_p, bool inhibit_id_p) | |
4588ec20 | 4409 | { |
5f5c8ee5 GM |
4410 | /* Frame matrices to work on. */ |
4411 | struct glyph_matrix *current_matrix = f->current_matrix; | |
4412 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
4413 | int i; | |
59ea14cd | 4414 | bool pause_p; |
4588ec20 | 4415 | int preempt_count = baud_rate / 2400 + 1; |
5f5c8ee5 | 4416 | |
a54e2c05 | 4417 | eassert (current_matrix && desired_matrix); |
4588ec20 | 4418 | |
c37e4889 RS |
4419 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
4420 | calculate_costs (f); | |
4421 | ||
d88c2b9e RS |
4422 | if (preempt_count <= 0) |
4423 | preempt_count = 1; | |
4424 | ||
a2130dbb | 4425 | if (!force_p && detect_input_pending_ignore_squeezables ()) |
4588ec20 | 4426 | { |
27786b2f | 4427 | pause_p = 1; |
4588ec20 JB |
4428 | goto do_pause; |
4429 | } | |
4430 | ||
5f5c8ee5 | 4431 | /* If we cannot insert/delete lines, it's no use trying it. */ |
daf01701 | 4432 | if (!FRAME_LINE_INS_DEL_OK (f)) |
5f5c8ee5 | 4433 | inhibit_id_p = 1; |
7098a0fa | 4434 | |
efb859b4 | 4435 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
4436 | i/d line if just want cursor motion. */ |
4437 | for (i = 0; i < desired_matrix->nrows; i++) | |
4438 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
4439 | break; |
4440 | ||
4441 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
4442 | if (!inhibit_id_p && i < desired_matrix->nrows) |
4443 | force_p |= scrolling (f); | |
4588ec20 JB |
4444 | |
4445 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
4446 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
4447 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 4448 | |
5f5c8ee5 GM |
4449 | /* Now update the rest of the lines. */ |
4450 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 4451 | { |
5f5c8ee5 | 4452 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 4453 | { |
b6a65ac2 | 4454 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
4455 | { |
4456 | /* Flush out every so many lines. | |
4457 | Also flush out if likely to have more than 1k buffered | |
4458 | otherwise. I'm told that some telnet connections get | |
4459 | really screwed by more than 1k output at once. */ | |
fced92f1 CY |
4460 | FILE *display_output = FRAME_TTY (f)->output; |
4461 | if (display_output) | |
4588ec20 | 4462 | { |
8148369c | 4463 | ptrdiff_t outq = __fpending (display_output); |
fced92f1 CY |
4464 | if (outq > 900 |
4465 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
06b63c9b | 4466 | fflush (display_output); |
4588ec20 | 4467 | } |
4588ec20 JB |
4468 | } |
4469 | ||
d012c62b | 4470 | if (!force_p && (i - 1) % preempt_count == 0) |
a2d5fca0 | 4471 | detect_input_pending_ignore_squeezables (); |
a2960116 | 4472 | |
5f5c8ee5 | 4473 | update_frame_line (f, i); |
4588ec20 | 4474 | } |
4588ec20 | 4475 | } |
177c0ea7 | 4476 | |
59ea14cd | 4477 | pause_p = 0 < i && i < FRAME_LINES (f) - 1; |
4588ec20 JB |
4478 | |
4479 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
27786b2f | 4480 | if (!pause_p) |
4588ec20 | 4481 | { |
48cf7030 | 4482 | if ((cursor_in_echo_area |
5f5c8ee5 | 4483 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 4484 | show the cursor for the message instead of for the |
5f5c8ee5 | 4485 | (now hidden) mini-buffer contents. */ |
2577053b RS |
4486 | || (EQ (minibuf_window, selected_window) |
4487 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 4488 | && !NILP (echo_area_buffer[0]))) |
2577053b | 4489 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 4490 | the active mini-buffer window. */ |
2577053b | 4491 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 4492 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 4493 | { |
7df02016 | 4494 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
4495 | int row, col; |
4496 | ||
4497 | if (cursor_in_echo_area < 0) | |
4498 | { | |
5f5c8ee5 GM |
4499 | /* Negative value of cursor_in_echo_area means put |
4500 | cursor at beginning of line. */ | |
648fa17d JB |
4501 | row = top; |
4502 | col = 0; | |
4503 | } | |
1113d9db | 4504 | else |
648fa17d | 4505 | { |
5f5c8ee5 GM |
4506 | /* Positive value of cursor_in_echo_area means put |
4507 | cursor at the end of the prompt. If the mini-buffer | |
4508 | is several lines high, find the last line that has | |
4509 | any text on it. */ | |
7df02016 | 4510 | row = FRAME_LINES (f); |
177c0ea7 | 4511 | do |
648fa17d | 4512 | { |
5f5c8ee5 GM |
4513 | --row; |
4514 | col = 0; | |
177c0ea7 | 4515 | |
5f5c8ee5 GM |
4516 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
4517 | { | |
4518 | /* Frame rows are filled up with spaces that | |
4519 | must be ignored here. */ | |
5f5c8ee5 GM |
4520 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
4521 | row); | |
4522 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
4523 | struct glyph *last = start + r->used[TEXT_AREA]; | |
4524 | ||
4525 | while (last > start | |
4526 | && (last - 1)->charpos < 0) | |
4527 | --last; | |
177c0ea7 | 4528 | |
5f5c8ee5 GM |
4529 | col = last - start; |
4530 | } | |
648fa17d JB |
4531 | } |
4532 | while (row > top && col == 0); | |
4533 | ||
6395da5c | 4534 | /* Make sure COL is not out of range. */ |
868e640e | 4535 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 4536 | { |
6395da5c | 4537 | /* If we have another row, advance cursor into it. */ |
7df02016 | 4538 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 4539 | { |
7df02016 | 4540 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
4541 | row++; |
4542 | } | |
4543 | /* Otherwise move it back in range. */ | |
4544 | else | |
868e640e | 4545 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
4546 | } |
4547 | } | |
4548 | ||
385ed61f | 4549 | cursor_to (f, row, col); |
1113d9db | 4550 | } |
4588ec20 | 4551 | else |
5f5c8ee5 GM |
4552 | { |
4553 | /* We have only one cursor on terminal frames. Use it to | |
4554 | display the cursor of the selected window. */ | |
4555 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
4556 | if (w->cursor.vpos >= 0 |
4557 | /* The cursor vpos may be temporarily out of bounds | |
4558 | in the following situation: There is one window, | |
4559 | with the cursor in the lower half of it. The window | |
4560 | is split, and a message causes a redisplay before | |
4561 | a new cursor position has been computed. */ | |
7df02016 | 4562 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
4563 | { |
4564 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
4565 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
4566 | ||
eeaf9bf3 | 4567 | x += max (0, w->left_margin_cols); |
385ed61f | 4568 | cursor_to (f, y, x); |
5f5c8ee5 GM |
4569 | } |
4570 | } | |
4588ec20 JB |
4571 | } |
4572 | ||
4588ec20 JB |
4573 | do_pause: |
4574 | ||
5f5c8ee5 | 4575 | clear_desired_matrices (f); |
27786b2f | 4576 | return pause_p; |
4588ec20 JB |
4577 | } |
4578 | ||
4588ec20 | 4579 | |
5f5c8ee5 | 4580 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 4581 | |
59ea14cd | 4582 | static bool |
971de7fb | 4583 | scrolling (struct frame *frame) |
4588ec20 JB |
4584 | { |
4585 | int unchanged_at_top, unchanged_at_bottom; | |
4586 | int window_size; | |
4587 | int changed_lines; | |
38182d90 PE |
4588 | int *old_hash = alloca (FRAME_LINES (frame) * sizeof (int)); |
4589 | int *new_hash = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4590 | int *draw_cost = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4591 | int *old_draw_cost = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 4592 | register int i; |
7df02016 | 4593 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
4594 | struct glyph_matrix *current_matrix = frame->current_matrix; |
4595 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 4596 | |
77e3b1b7 | 4597 | eassert (current_matrix); |
4588ec20 | 4598 | |
5f5c8ee5 GM |
4599 | /* Compute hash codes of all the lines. Also calculate number of |
4600 | changed lines, number of unchanged lines at the beginning, and | |
4601 | number of unchanged lines at the end. */ | |
4588ec20 JB |
4602 | changed_lines = 0; |
4603 | unchanged_at_top = 0; | |
7df02016 KS |
4604 | unchanged_at_bottom = FRAME_LINES (frame); |
4605 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
4606 | { |
4607 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 4608 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 4609 | return 0; |
77e3b1b7 | 4610 | old_hash[i] = line_hash_code (frame, MATRIX_ROW (current_matrix, i)); |
5f5c8ee5 | 4611 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
f188b3c4 RS |
4612 | { |
4613 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
4614 | new_hash[i] = old_hash[i]; | |
4615 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
4616 | draw_cost[i] = INFINITY; | |
4617 | } | |
4588ec20 | 4618 | else |
f188b3c4 | 4619 | { |
77e3b1b7 DA |
4620 | new_hash[i] = line_hash_code (frame, MATRIX_ROW (desired_matrix, i)); |
4621 | draw_cost[i] = line_draw_cost (frame, desired_matrix, i); | |
f188b3c4 | 4622 | } |
4588ec20 JB |
4623 | |
4624 | if (old_hash[i] != new_hash[i]) | |
4625 | { | |
4626 | changed_lines++; | |
7df02016 | 4627 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
4628 | } |
4629 | else if (i == unchanged_at_top) | |
4630 | unchanged_at_top++; | |
77e3b1b7 | 4631 | old_draw_cost[i] = line_draw_cost (frame, current_matrix, i); |
4588ec20 JB |
4632 | } |
4633 | ||
4634 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
daf01701 | 4635 | if ((!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4636 | && changed_lines < baud_rate / 2400) |
7df02016 | 4637 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
4638 | return 1; |
4639 | ||
7df02016 | 4640 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
4641 | - unchanged_at_bottom); |
4642 | ||
daf01701 | 4643 | if (FRAME_SCROLL_REGION_OK (frame)) |
4588ec20 | 4644 | free_at_end_vpos -= unchanged_at_bottom; |
daf01701 | 4645 | else if (FRAME_MEMORY_BELOW_FRAME (frame)) |
4588ec20 JB |
4646 | free_at_end_vpos = -1; |
4647 | ||
4648 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 4649 | current frame and desired frame, don't bother with i/d calc. */ |
daf01701 | 4650 | if (!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4651 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
4652 | && (window_size >= |
4653 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 4654 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
4655 | old_hash, new_hash, draw_cost))) |
4656 | return 0; | |
4657 | ||
5f5c8ee5 GM |
4658 | if (window_size < 2) |
4659 | return 0; | |
4660 | ||
502b9b64 | 4661 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 4662 | draw_cost + unchanged_at_top - 1, |
190bb91a | 4663 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
4664 | old_hash + unchanged_at_top - 1, |
4665 | new_hash + unchanged_at_top - 1, | |
4666 | free_at_end_vpos - unchanged_at_top); | |
4667 | ||
4668 | return 0; | |
4669 | } | |
4588ec20 | 4670 | |
4588ec20 | 4671 | |
5f5c8ee5 GM |
4672 | /* Count the number of blanks at the start of the vector of glyphs R |
4673 | which is LEN glyphs long. */ | |
4588ec20 | 4674 | |
4588ec20 | 4675 | static int |
971de7fb | 4676 | count_blanks (struct glyph *r, int len) |
4588ec20 | 4677 | { |
5f5c8ee5 | 4678 | int i; |
177c0ea7 | 4679 | |
5f5c8ee5 GM |
4680 | for (i = 0; i < len; ++i) |
4681 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
4682 | break; | |
4683 | ||
4684 | return i; | |
4588ec20 JB |
4685 | } |
4686 | ||
5f5c8ee5 GM |
4687 | |
4688 | /* Count the number of glyphs in common at the start of the glyph | |
4689 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
4690 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
4691 | ||
4588ec20 | 4692 | static int |
971de7fb | 4693 | count_match (struct glyph *str1, struct glyph *end1, struct glyph *str2, struct glyph *end2) |
4588ec20 | 4694 | { |
5f5c8ee5 GM |
4695 | struct glyph *p1 = str1; |
4696 | struct glyph *p2 = str2; | |
177c0ea7 | 4697 | |
5f5c8ee5 GM |
4698 | while (p1 < end1 |
4699 | && p2 < end2 | |
42186983 | 4700 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 4701 | ++p1, ++p2; |
177c0ea7 | 4702 | |
5f5c8ee5 | 4703 | return p1 - str1; |
4588ec20 JB |
4704 | } |
4705 | ||
5f5c8ee5 | 4706 | |
4588ec20 | 4707 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 4708 | |
5e617bc2 | 4709 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS ((f))]) |
4588ec20 | 4710 | |
5f5c8ee5 GM |
4711 | |
4712 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
4713 | ||
4588ec20 | 4714 | static void |
971de7fb | 4715 | update_frame_line (struct frame *f, int vpos) |
4588ec20 | 4716 | { |
5f5c8ee5 | 4717 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
4718 | int tem; |
4719 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
4720 | struct glyph_matrix *current_matrix = f->current_matrix; |
4721 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
4722 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
4723 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
59ea14cd PE |
4724 | bool must_write_whole_line_p; |
4725 | bool write_spaces_p = FRAME_MUST_WRITE_SPACES (f); | |
4726 | bool colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background | |
4727 | != FACE_TTY_DEFAULT_BG_COLOR); | |
0a894bad GM |
4728 | |
4729 | if (colored_spaces_p) | |
4730 | write_spaces_p = 1; | |
5f5c8ee5 | 4731 | |
26c63686 GM |
4732 | /* Current row not enabled means it has unknown contents. We must |
4733 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
4734 | must_write_whole_line_p = !current_row->enabled_p; |
4735 | if (must_write_whole_line_p) | |
4588ec20 | 4736 | { |
5f5c8ee5 | 4737 | obody = 0; |
4588ec20 JB |
4738 | olen = 0; |
4739 | } | |
4740 | else | |
4741 | { | |
5f5c8ee5 GM |
4742 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
4743 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 4744 | |
4cecaab8 MB |
4745 | /* Ignore trailing spaces, if we can. */ |
4746 | if (!write_spaces_p) | |
4747 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
4748 | olen--; | |
4588ec20 JB |
4749 | } |
4750 | ||
5f5c8ee5 GM |
4751 | current_row->enabled_p = 1; |
4752 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 4753 | |
5f5c8ee5 GM |
4754 | /* If desired line is empty, just clear the line. */ |
4755 | if (!desired_row->enabled_p) | |
4588ec20 JB |
4756 | { |
4757 | nlen = 0; | |
4758 | goto just_erase; | |
4759 | } | |
4760 | ||
5f5c8ee5 GM |
4761 | nbody = desired_row->glyphs[TEXT_AREA]; |
4762 | nlen = desired_row->used[TEXT_AREA]; | |
4763 | nend = nbody + nlen; | |
4764 | ||
4765 | /* If display line has unknown contents, write the whole line. */ | |
4766 | if (must_write_whole_line_p) | |
4767 | { | |
26c63686 | 4768 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 4769 | if (!write_spaces_p) |
74ca462f GM |
4770 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
4771 | --nlen; | |
4772 | ||
26c63686 | 4773 | /* Write the contents of the desired line. */ |
74ca462f | 4774 | if (nlen) |
26c63686 | 4775 | { |
385ed61f KL |
4776 | cursor_to (f, vpos, 0); |
4777 | write_glyphs (f, nbody, nlen); | |
26c63686 | 4778 | } |
177c0ea7 | 4779 | |
26c63686 GM |
4780 | /* Don't call clear_end_of_line if we already wrote the whole |
4781 | line. The cursor will not be at the right margin in that | |
4782 | case but in the line below. */ | |
7df02016 | 4783 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 | 4784 | { |
385ed61f KL |
4785 | cursor_to (f, vpos, nlen); |
4786 | clear_end_of_line (f, FRAME_TOTAL_COLS (f)); | |
26c63686 | 4787 | } |
58827478 GM |
4788 | else |
4789 | /* Make sure we are in the right row, otherwise cursor movement | |
4790 | with cmgoto might use `ch' in the wrong row. */ | |
385ed61f | 4791 | cursor_to (f, vpos, 0); |
177c0ea7 | 4792 | |
5f5c8ee5 GM |
4793 | make_current (desired_matrix, current_matrix, vpos); |
4794 | return; | |
4795 | } | |
4588ec20 JB |
4796 | |
4797 | /* Pretend trailing spaces are not there at all, | |
4798 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
4799 | if (!write_spaces_p) |
4800 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
4801 | nlen--; | |
4588ec20 JB |
4802 | |
4803 | /* If there's no i/d char, quickly do the best we can without it. */ | |
daf01701 | 4804 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
4588ec20 | 4805 | { |
5f5c8ee5 | 4806 | int i, j; |
4588ec20 | 4807 | |
5f5c8ee5 GM |
4808 | /* Find the first glyph in desired row that doesn't agree with |
4809 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
4810 | for (i = 0; i < nlen; i++) |
4811 | { | |
5f5c8ee5 | 4812 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 4813 | { |
5f5c8ee5 GM |
4814 | /* Find the end of the run of different glyphs. */ |
4815 | j = i + 1; | |
4816 | while (j < nlen | |
4817 | && (j >= olen | |
4818 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
4819 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
4820 | ++j; | |
177c0ea7 JB |
4821 | |
4822 | /* Output this run of non-matching chars. */ | |
385ed61f KL |
4823 | cursor_to (f, vpos, i); |
4824 | write_glyphs (f, nbody + i, j - i); | |
5f5c8ee5 | 4825 | i = j - 1; |
4588ec20 JB |
4826 | |
4827 | /* Now find the next non-match. */ | |
4828 | } | |
4829 | } | |
4830 | ||
4831 | /* Clear the rest of the line, or the non-clear part of it. */ | |
4832 | if (olen > nlen) | |
4833 | { | |
385ed61f KL |
4834 | cursor_to (f, vpos, nlen); |
4835 | clear_end_of_line (f, olen); | |
4588ec20 JB |
4836 | } |
4837 | ||
5f5c8ee5 GM |
4838 | /* Make current row = desired row. */ |
4839 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
4840 | return; |
4841 | } | |
4842 | ||
5f5c8ee5 GM |
4843 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
4844 | characters in a row. */ | |
4845 | ||
4588ec20 JB |
4846 | if (!olen) |
4847 | { | |
5f5c8ee5 GM |
4848 | /* If current line is blank, skip over initial spaces, if |
4849 | possible, and write the rest. */ | |
4cecaab8 | 4850 | if (write_spaces_p) |
5f5c8ee5 GM |
4851 | nsp = 0; |
4852 | else | |
4853 | nsp = count_blanks (nbody, nlen); | |
4854 | ||
4588ec20 JB |
4855 | if (nlen > nsp) |
4856 | { | |
385ed61f KL |
4857 | cursor_to (f, vpos, nsp); |
4858 | write_glyphs (f, nbody + nsp, nlen - nsp); | |
4588ec20 JB |
4859 | } |
4860 | ||
502b9b64 | 4861 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 4862 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
4863 | return; |
4864 | } | |
4865 | ||
4588ec20 | 4866 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 4867 | osp = count_blanks (obody, olen); |
4cecaab8 | 4868 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 4869 | |
5f5c8ee5 GM |
4870 | /* Compute number of matching chars starting with first non-blank. */ |
4871 | begmatch = count_match (obody + osp, obody + olen, | |
4872 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
4873 | |
4874 | /* Spaces in new match implicit space past the end of old. */ | |
4875 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 4876 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
4877 | { |
4878 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
4879 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
4880 | ++begmatch; | |
4588ec20 JB |
4881 | } |
4882 | ||
4883 | /* Avoid doing insert/delete char | |
4884 | just cause number of leading spaces differs | |
5f5c8ee5 | 4885 | when the following text does not match. */ |
4588ec20 JB |
4886 | if (begmatch == 0 && osp != nsp) |
4887 | osp = nsp = min (osp, nsp); | |
4888 | ||
4889 | /* Find matching characters at end of line */ | |
4890 | op1 = obody + olen; | |
4891 | np1 = nbody + nlen; | |
4892 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
4893 | while (op1 > op2 |
4894 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
4895 | { |
4896 | op1--; | |
4897 | np1--; | |
4898 | } | |
4899 | endmatch = obody + olen - op1; | |
4900 | ||
4588ec20 JB |
4901 | /* tem gets the distance to insert or delete. |
4902 | endmatch is how many characters we save by doing so. | |
4903 | Is it worth it? */ | |
4904 | ||
4905 | tem = (nlen - nsp) - (olen - osp); | |
4906 | if (endmatch && tem | |
daf01701 | 4907 | && (!FRAME_CHAR_INS_DEL_OK (f) |
8a56675d | 4908 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
4909 | endmatch = 0; |
4910 | ||
4911 | /* nsp - osp is the distance to insert or delete. | |
4912 | If that is nonzero, begmatch is known to be nonzero also. | |
4913 | begmatch + endmatch is how much we save by doing the ins/del. | |
4914 | Is it worth it? */ | |
4915 | ||
4916 | if (nsp != osp | |
daf01701 | 4917 | && (!FRAME_CHAR_INS_DEL_OK (f) |
c363a1d6 | 4918 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
4919 | { |
4920 | begmatch = 0; | |
4921 | endmatch = 0; | |
4922 | osp = nsp = min (osp, nsp); | |
4923 | } | |
4924 | ||
4925 | /* Now go through the line, inserting, writing and | |
4926 | deleting as appropriate. */ | |
4927 | ||
4928 | if (osp > nsp) | |
4929 | { | |
385ed61f KL |
4930 | cursor_to (f, vpos, nsp); |
4931 | delete_glyphs (f, osp - nsp); | |
4588ec20 JB |
4932 | } |
4933 | else if (nsp > osp) | |
4934 | { | |
4935 | /* If going to delete chars later in line | |
4936 | and insert earlier in the line, | |
4937 | must delete first to avoid losing data in the insert */ | |
4938 | if (endmatch && nlen < olen + nsp - osp) | |
4939 | { | |
385ed61f KL |
4940 | cursor_to (f, vpos, nlen - endmatch + osp - nsp); |
4941 | delete_glyphs (f, olen + nsp - osp - nlen); | |
4588ec20 JB |
4942 | olen = nlen - (nsp - osp); |
4943 | } | |
385ed61f KL |
4944 | cursor_to (f, vpos, osp); |
4945 | insert_glyphs (f, 0, nsp - osp); | |
4588ec20 JB |
4946 | } |
4947 | olen += nsp - osp; | |
4948 | ||
4949 | tem = nsp + begmatch + endmatch; | |
4950 | if (nlen != tem || olen != tem) | |
4951 | { | |
4588ec20 JB |
4952 | if (!endmatch || nlen == olen) |
4953 | { | |
c363a1d6 GM |
4954 | /* If new text being written reaches right margin, there is |
4955 | no need to do clear-to-eol at the end of this function | |
4956 | (and it would not be safe, since cursor is not going to | |
4957 | be "at the margin" after the text is done). */ | |
7df02016 | 4958 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 4959 | olen = 0; |
c363a1d6 GM |
4960 | |
4961 | /* Function write_glyphs is prepared to do nothing | |
4962 | if passed a length <= 0. Check it here to avoid | |
4963 | unnecessary cursor movement. */ | |
4964 | if (nlen - tem > 0) | |
4965 | { | |
385ed61f KL |
4966 | cursor_to (f, vpos, nsp + begmatch); |
4967 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
c363a1d6 | 4968 | } |
4588ec20 JB |
4969 | } |
4970 | else if (nlen > olen) | |
4971 | { | |
24e86043 KH |
4972 | /* Here, we used to have the following simple code: |
4973 | ---------------------------------------- | |
4974 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
4975 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
4976 | ---------------------------------------- | |
4977 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
4978 | is a padding glyph. */ | |
4979 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
4980 | int del; | |
5f5c8ee5 | 4981 | |
385ed61f | 4982 | cursor_to (f, vpos, nsp + begmatch); |
177c0ea7 | 4983 | |
5f5c8ee5 | 4984 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
4985 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
4986 | out--; | |
385ed61f | 4987 | write_glyphs (f, nbody + nsp + begmatch, out); |
177c0ea7 | 4988 | |
5f5c8ee5 GM |
4989 | /* If we left columns to be overwritten, we must delete them. */ |
4990 | del = olen - tem - out; | |
c363a1d6 | 4991 | if (del > 0) |
385ed61f | 4992 | delete_glyphs (f, del); |
177c0ea7 | 4993 | |
5f5c8ee5 | 4994 | /* At last, we insert columns not yet written out. */ |
385ed61f | 4995 | insert_glyphs (f, nbody + nsp + begmatch + out, nlen - olen + del); |
5f5c8ee5 GM |
4996 | olen = nlen; |
4997 | } | |
4998 | else if (olen > nlen) | |
4999 | { | |
385ed61f KL |
5000 | cursor_to (f, vpos, nsp + begmatch); |
5001 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
5002 | delete_glyphs (f, olen - nlen); | |
5f5c8ee5 GM |
5003 | olen = nlen; |
5004 | } | |
bd9e3e75 | 5005 | } |
5f5c8ee5 GM |
5006 | |
5007 | just_erase: | |
5008 | /* If any unerased characters remain after the new line, erase them. */ | |
5009 | if (olen > nlen) | |
078b3696 | 5010 | { |
385ed61f KL |
5011 | cursor_to (f, vpos, nlen); |
5012 | clear_end_of_line (f, olen); | |
078b3696 | 5013 | } |
5f5c8ee5 GM |
5014 | |
5015 | /* Exchange contents between current_frame and new_frame. */ | |
5016 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5017 | } |
5f5c8ee5 GM |
5018 | |
5019 | ||
078b3696 | 5020 | \f |
5f5c8ee5 GM |
5021 | /*********************************************************************** |
5022 | X/Y Position -> Buffer Position | |
5023 | ***********************************************************************/ | |
5024 | ||
a1b0a6db | 5025 | /* Determine what's under window-relative pixel position (*X, *Y). |
2396cbba | 5026 | Return the OBJECT (string or buffer) that's there. |
6b61353c | 5027 | Return in *POS the position in that object. |
2396cbba EZ |
5028 | Adjust *X and *Y to character positions. |
5029 | Return in *DX and *DY the pixel coordinates of the click, | |
5030 | relative to the top left corner of OBJECT, or relative to | |
5031 | the top left corner of the character glyph at (*X, *Y) | |
5032 | if OBJECT is nil. | |
5033 | Return WIDTH and HEIGHT of the object at (*X, *Y), or zero | |
5034 | if the coordinates point to an empty area of the display. */ | |
5f5c8ee5 | 5035 | |
6b61353c | 5036 | Lisp_Object |
971de7fb | 5037 | 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 | 5038 | { |
5f5c8ee5 | 5039 | struct it it; |
707ea971 | 5040 | Lisp_Object old_current_buffer = Fcurrent_buffer (); |
5f5c8ee5 | 5041 | struct text_pos startp; |
6b61353c KH |
5042 | Lisp_Object string; |
5043 | struct glyph_row *row; | |
cedd7cd9 KS |
5044 | #ifdef HAVE_WINDOW_SYSTEM |
5045 | struct image *img = 0; | |
5046 | #endif | |
2396cbba | 5047 | int x0, x1, to_x; |
57b3e30b | 5048 | void *itdata = NULL; |
5f5c8ee5 | 5049 | |
707ea971 CY |
5050 | /* We used to set current_buffer directly here, but that does the |
5051 | wrong thing with `face-remapping-alist' (bug#2044). */ | |
e74aeda8 | 5052 | Fset_buffer (w->contents); |
57b3e30b | 5053 | itdata = bidi_shelve_cache (); |
cf91889a | 5054 | CLIP_TEXT_POS_FROM_MARKER (startp, w->start); |
5f5c8ee5 | 5055 | start_display (&it, w, startp); |
352ec8ff EZ |
5056 | /* start_display takes into account the header-line row, but IT's |
5057 | vpos still counts from the glyph row that includes the window's | |
5058 | start position. Adjust for a possible header-line row. */ | |
59ea14cd | 5059 | it.vpos += WINDOW_WANTS_HEADER_LINE_P (w); |
177c0ea7 | 5060 | |
9173a8fb | 5061 | x0 = *x; |
2396cbba EZ |
5062 | |
5063 | /* First, move to the beginning of the row corresponding to *Y. We | |
5064 | need to be in that row to get the correct value of base paragraph | |
40629f17 | 5065 | direction for the text at (*X, *Y). */ |
2396cbba EZ |
5066 | move_it_to (&it, -1, 0, *y, -1, MOVE_TO_X | MOVE_TO_Y); |
5067 | ||
5068 | /* TO_X is the pixel position that the iterator will compute for the | |
40629f17 EZ |
5069 | glyph at *X. We add it.first_visible_x because iterator |
5070 | positions include the hscroll. */ | |
2396cbba EZ |
5071 | to_x = x0 + it.first_visible_x; |
5072 | if (it.bidi_it.paragraph_dir == R2L) | |
5073 | /* For lines in an R2L paragraph, we need to mirror TO_X wrt the | |
5074 | text area. This is because the iterator, even in R2L | |
5075 | paragraphs, delivers glyphs as if they started at the left | |
5076 | margin of the window. (When we actually produce glyphs for | |
5077 | display, we reverse their order in PRODUCE_GLYPHS, but the | |
5078 | iterator doesn't know about that.) The following line adjusts | |
5079 | the pixel position to the iterator geometry, which is what | |
40629f17 EZ |
5080 | move_it_* routines use. (The -1 is because in a window whose |
5081 | text-area width is W, the rightmost pixel position is W-1, and | |
5082 | it should be mirrored into zero pixel position.) */ | |
5083 | to_x = window_box_width (w, TEXT_AREA) - to_x - 1; | |
5084 | ||
5085 | /* Now move horizontally in the row to the glyph under *X. Second | |
5086 | argument is ZV to prevent move_it_in_display_line from matching | |
5087 | based on buffer positions. */ | |
2396cbba | 5088 | move_it_in_display_line (&it, ZV, to_x, MOVE_TO_X); |
35928349 | 5089 | bidi_unshelve_cache (itdata, 0); |
177c0ea7 | 5090 | |
707ea971 | 5091 | Fset_buffer (old_current_buffer); |
a1b0a6db | 5092 | |
6b61353c KH |
5093 | *dx = x0 + it.first_visible_x - it.current_x; |
5094 | *dy = *y - it.current_y; | |
5095 | ||
e74aeda8 | 5096 | string = w->contents; |
6b61353c KH |
5097 | if (STRINGP (it.string)) |
5098 | string = it.string; | |
a1b0a6db | 5099 | *pos = it.current; |
86282aab KH |
5100 | if (it.what == IT_COMPOSITION |
5101 | && it.cmp_it.nchars > 1 | |
5102 | && it.cmp_it.reversed_p) | |
5103 | { | |
5104 | /* The current display element is a grapheme cluster in a | |
5105 | composition. In that case, we need the position of the first | |
5106 | character of the cluster. But, as it.cmp_it.reversed_p is 1, | |
5107 | it.current points to the last character of the cluster, thus | |
5108 | we must move back to the first character of the same | |
5109 | cluster. */ | |
5110 | CHARPOS (pos->pos) -= it.cmp_it.nchars - 1; | |
5111 | if (STRINGP (it.string)) | |
5112 | BYTEPOS (pos->pos) = string_char_to_byte (string, CHARPOS (pos->pos)); | |
5113 | else | |
e74aeda8 | 5114 | BYTEPOS (pos->pos) = buf_charpos_to_bytepos (XBUFFER (w->contents), |
425cc014 | 5115 | CHARPOS (pos->pos)); |
86282aab | 5116 | } |
6b61353c KH |
5117 | |
5118 | #ifdef HAVE_WINDOW_SYSTEM | |
5119 | if (it.what == IT_IMAGE) | |
5120 | { | |
6b61353c KH |
5121 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5122 | && !NILP (img->spec)) | |
5123 | *object = img->spec; | |
5124 | } | |
5125 | #endif | |
5126 | ||
b70d98e1 KS |
5127 | if (it.vpos < w->current_matrix->nrows |
5128 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5129 | row->enabled_p)) | |
6b61353c KH |
5130 | { |
5131 | if (it.hpos < row->used[TEXT_AREA]) | |
5132 | { | |
5133 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6b61353c | 5134 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5135 | if (img) |
5136 | { | |
5137 | *dy -= row->ascent - glyph->ascent; | |
4be9765d KH |
5138 | *dx += glyph->slice.img.x; |
5139 | *dy += glyph->slice.img.y; | |
cedd7cd9 KS |
5140 | /* Image slices positions are still relative to the entire image */ |
5141 | *width = img->width; | |
5142 | *height = img->height; | |
5143 | } | |
5144 | else | |
6b61353c | 5145 | #endif |
cedd7cd9 KS |
5146 | { |
5147 | *width = glyph->pixel_width; | |
5148 | *height = glyph->ascent + glyph->descent; | |
5149 | } | |
6b61353c KH |
5150 | } |
5151 | else | |
5152 | { | |
5153 | *width = 0; | |
5154 | *height = row->height; | |
5155 | } | |
5156 | } | |
5157 | else | |
5158 | { | |
5159 | *width = *height = 0; | |
5160 | } | |
5161 | ||
5162 | /* Add extra (default width) columns if clicked after EOL. */ | |
5e617bc2 | 5163 | x1 = max (0, it.current_x + it.pixel_width - it.first_visible_x); |
6b61353c KH |
5164 | if (x0 > x1) |
5165 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5166 | ||
5167 | *x = it.hpos; | |
5168 | *y = it.vpos; | |
5169 | ||
5170 | return string; | |
5f5c8ee5 | 5171 | } |
4588ec20 | 5172 | |
5f5c8ee5 GM |
5173 | |
5174 | /* Value is the string under window-relative coordinates X/Y in the | |
6b61353c KH |
5175 | mode line or header line (PART says which) of window W, or nil if none. |
5176 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
5177 | |
5178 | Lisp_Object | |
ace1712c | 5179 | mode_line_string (struct window *w, enum window_part part, |
d311d28c | 5180 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5181 | int *dx, int *dy, int *width, int *height) |
5f5c8ee5 GM |
5182 | { |
5183 | struct glyph_row *row; | |
5184 | struct glyph *glyph, *end; | |
6b61353c | 5185 | int x0, y0; |
5f5c8ee5 GM |
5186 | Lisp_Object string = Qnil; |
5187 | ||
641bdbf3 | 5188 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
5189 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
5190 | else | |
045dee35 | 5191 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
6b61353c KH |
5192 | y0 = *y - row->y; |
5193 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
5f5c8ee5 GM |
5194 | |
5195 | if (row->mode_line_p && row->enabled_p) | |
4588ec20 | 5196 | { |
5f5c8ee5 GM |
5197 | /* Find the glyph under X. If we find one with a string object, |
5198 | it's the one we were looking for. */ | |
5199 | glyph = row->glyphs[TEXT_AREA]; | |
5200 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 5201 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5202 | x0 -= glyph->pixel_width; |
5203 | *x = glyph - row->glyphs[TEXT_AREA]; | |
5204 | if (glyph < end) | |
5205 | { | |
5206 | string = glyph->object; | |
5207 | *charpos = glyph->charpos; | |
5208 | *width = glyph->pixel_width; | |
5209 | *height = glyph->ascent + glyph->descent; | |
5210 | #ifdef HAVE_WINDOW_SYSTEM | |
5211 | if (glyph->type == IMAGE_GLYPH) | |
5212 | { | |
5213 | struct image *img; | |
5214 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5215 | if (img != NULL) | |
5216 | *object = img->spec; | |
5217 | y0 -= row->ascent - glyph->ascent; | |
5218 | } | |
5219 | #endif | |
5220 | } | |
5221 | else | |
5222 | { | |
5223 | /* Add extra (default width) columns if clicked after EOL. */ | |
5224 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5225 | *width = 0; | |
5226 | *height = row->height; | |
5227 | } | |
5228 | } | |
5229 | else | |
5230 | { | |
5231 | *x = 0; | |
5232 | x0 = 0; | |
5233 | *width = *height = 0; | |
4588ec20 | 5234 | } |
5f5c8ee5 | 5235 | |
6b61353c KH |
5236 | *dx = x0; |
5237 | *dy = y0; | |
5238 | ||
5f5c8ee5 | 5239 | return string; |
4588ec20 | 5240 | } |
5f5c8ee5 GM |
5241 | |
5242 | ||
db1db309 GM |
5243 | /* Value is the string under window-relative coordinates X/Y in either |
5244 | marginal area, or nil if none. *CHARPOS is set to the position in | |
5245 | the string returned. */ | |
5246 | ||
5247 | Lisp_Object | |
ace1712c | 5248 | marginal_area_string (struct window *w, enum window_part part, |
d311d28c | 5249 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5250 | int *dx, int *dy, int *width, int *height) |
db1db309 GM |
5251 | { |
5252 | struct glyph_row *row = w->current_matrix->rows; | |
5253 | struct glyph *glyph, *end; | |
6b61353c | 5254 | int x0, y0, i, wy = *y; |
641bdbf3 | 5255 | int area; |
db1db309 GM |
5256 | Lisp_Object string = Qnil; |
5257 | ||
641bdbf3 | 5258 | if (part == ON_LEFT_MARGIN) |
db1db309 | 5259 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 5260 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
5261 | area = RIGHT_MARGIN_AREA; |
5262 | else | |
1088b922 | 5263 | emacs_abort (); |
db1db309 GM |
5264 | |
5265 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
5266 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
5267 | break; | |
6b61353c KH |
5268 | y0 = *y - row->y; |
5269 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
db1db309 GM |
5270 | |
5271 | if (row->enabled_p) | |
5272 | { | |
5273 | /* Find the glyph under X. If we find one with a string object, | |
5274 | it's the one we were looking for. */ | |
db1db309 | 5275 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 5276 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5277 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5278 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) |
5279 | + window_box_width (w, LEFT_MARGIN_AREA) | |
5280 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 5281 | else |
7df02016 | 5282 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5283 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5284 | : 0); |
5285 | ||
6b61353c KH |
5286 | glyph = row->glyphs[area]; |
5287 | end = glyph + row->used[area]; | |
cfde341f | 5288 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5289 | x0 -= glyph->pixel_width; |
5290 | *x = glyph - row->glyphs[area]; | |
5291 | if (glyph < end) | |
5292 | { | |
5293 | string = glyph->object; | |
5294 | *charpos = glyph->charpos; | |
5295 | *width = glyph->pixel_width; | |
5296 | *height = glyph->ascent + glyph->descent; | |
5297 | #ifdef HAVE_WINDOW_SYSTEM | |
5298 | if (glyph->type == IMAGE_GLYPH) | |
5299 | { | |
5300 | struct image *img; | |
5301 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5302 | if (img != NULL) | |
5303 | *object = img->spec; | |
5304 | y0 -= row->ascent - glyph->ascent; | |
4be9765d KH |
5305 | x0 += glyph->slice.img.x; |
5306 | y0 += glyph->slice.img.y; | |
6b61353c KH |
5307 | } |
5308 | #endif | |
5309 | } | |
5310 | else | |
5311 | { | |
5312 | /* Add extra (default width) columns if clicked after EOL. */ | |
5313 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5314 | *width = 0; | |
5315 | *height = row->height; | |
5316 | } | |
db1db309 | 5317 | } |
6b61353c KH |
5318 | else |
5319 | { | |
5320 | x0 = 0; | |
5321 | *x = 0; | |
5322 | *width = *height = 0; | |
5323 | } | |
5324 | ||
5325 | *dx = x0; | |
5326 | *dy = y0; | |
db1db309 GM |
5327 | |
5328 | return string; | |
5329 | } | |
5330 | ||
5331 | ||
5f5c8ee5 GM |
5332 | /*********************************************************************** |
5333 | Changing Frame Sizes | |
5334 | ***********************************************************************/ | |
4588ec20 JB |
5335 | |
5336 | #ifdef SIGWINCH | |
5f5c8ee5 | 5337 | |
20ef56db PE |
5338 | static void deliver_window_change_signal (int); |
5339 | ||
9af30bdf | 5340 | static void |
20ef56db | 5341 | handle_window_change_signal (int sig) |
4588ec20 JB |
5342 | { |
5343 | int width, height; | |
28d7d09f | 5344 | struct tty_display_info *tty; |
4d553a13 | 5345 | |
9628b887 KL |
5346 | /* The frame size change obviously applies to a single |
5347 | termcap-controlled terminal, but we can't decide which. | |
5348 | Therefore, we resize the frames corresponding to each tty. | |
9628b887 KL |
5349 | */ |
5350 | for (tty = tty_list; tty; tty = tty->next) { | |
4588ec20 | 5351 | |
0a125897 KL |
5352 | if (! tty->term_initted) |
5353 | continue; | |
4588ec20 | 5354 | |
db878925 DN |
5355 | /* Suspended tty frames have tty->input == NULL avoid trying to |
5356 | use it. */ | |
5357 | if (!tty->input) | |
5358 | continue; | |
5359 | ||
0b0d3e0b | 5360 | get_tty_size (fileno (tty->input), &width, &height); |
3fc809e2 | 5361 | |
bedeffcf | 5362 | if (width > 5 && height > 2) { |
9628b887 | 5363 | Lisp_Object tail, frame; |
3fc809e2 | 5364 | |
9628b887 | 5365 | FOR_EACH_FRAME (tail, frame) |
4d553a13 KL |
5366 | if (FRAME_TERMCAP_P (XFRAME (frame)) && FRAME_TTY (XFRAME (frame)) == tty) |
5367 | /* Record the new sizes, but don't reallocate the data | |
5368 | structures now. Let that be done later outside of the | |
5369 | signal handler. */ | |
5370 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); | |
9628b887 | 5371 | } |
4588ec20 | 5372 | } |
20ef56db | 5373 | } |
3fc809e2 | 5374 | |
20ef56db PE |
5375 | static void |
5376 | deliver_window_change_signal (int sig) | |
5377 | { | |
4d7e6e51 | 5378 | deliver_process_signal (sig, handle_window_change_signal); |
4588ec20 JB |
5379 | } |
5380 | #endif /* SIGWINCH */ | |
5381 | ||
5382 | ||
59ea14cd PE |
5383 | /* Do any change in frame size that was requested by a signal. |
5384 | SAFE means this function is called from a place where it is | |
5385 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 5386 | |
dfcf069d | 5387 | void |
59ea14cd | 5388 | do_pending_window_change (bool safe) |
4588ec20 | 5389 | { |
20ef56db | 5390 | /* If window change signal handler should have run before, run it now. */ |
b96fd3e8 GM |
5391 | if (redisplaying_p && !safe) |
5392 | return; | |
177c0ea7 | 5393 | |
4588ec20 JB |
5394 | while (delayed_size_change) |
5395 | { | |
35f56f96 | 5396 | Lisp_Object tail, frame; |
4588ec20 JB |
5397 | |
5398 | delayed_size_change = 0; | |
5399 | ||
35f56f96 | 5400 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5401 | { |
5f5c8ee5 | 5402 | struct frame *f = XFRAME (frame); |
35f56f96 | 5403 | |
7df02016 KS |
5404 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
5405 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
5406 | 0, 0, safe); | |
4588ec20 JB |
5407 | } |
5408 | } | |
5409 | } | |
5410 | ||
5411 | ||
502b9b64 | 5412 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 5413 | indicate no change is to take place. |
4588ec20 | 5414 | |
59ea14cd PE |
5415 | If DELAY, assume we're being called from a signal handler, and |
5416 | queue the change for later - perhaps the next redisplay. | |
5417 | Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
5418 | from a signal handler. |
5419 | ||
59ea14cd | 5420 | SAFE means this function is called from a place where it's |
b96fd3e8 | 5421 | safe to change frame sizes while a redisplay is in progress. */ |
b6a65ac2 | 5422 | |
dfcf069d | 5423 | void |
59ea14cd PE |
5424 | change_frame_size (struct frame *f, int newheight, int newwidth, |
5425 | bool pretend, bool delay, bool safe) | |
45140e01 RS |
5426 | { |
5427 | Lisp_Object tail, frame; | |
3826ea1a | 5428 | |
9628b887 | 5429 | if (FRAME_MSDOS_P (f)) |
45140e01 | 5430 | { |
9628b887 KL |
5431 | /* On MS-DOS, all frames use the same screen, so a change in |
5432 | size affects all frames. Termcap now supports multiple | |
5433 | ttys. */ | |
45140e01 | 5434 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 5435 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 5436 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 5437 | pretend, delay, safe); |
45140e01 RS |
5438 | } |
5439 | else | |
b96fd3e8 | 5440 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
5441 | } |
5442 | ||
5443 | static void | |
59ea14cd PE |
5444 | change_frame_size_1 (struct frame *f, int newheight, int newwidth, |
5445 | bool pretend, bool delay, bool safe) | |
4588ec20 | 5446 | { |
7df02016 | 5447 | int new_frame_total_cols; |
d311d28c | 5448 | ptrdiff_t count = SPECPDL_INDEX (); |
3826ea1a | 5449 | |
4588ec20 | 5450 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 5451 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 5452 | { |
7df02016 KS |
5453 | f->new_text_lines = newheight; |
5454 | f->new_text_cols = newwidth; | |
4588ec20 JB |
5455 | delayed_size_change = 1; |
5456 | return; | |
5457 | } | |
5458 | ||
502b9b64 | 5459 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
5460 | f->new_text_lines = 0; |
5461 | f->new_text_cols = 0; | |
b6a65ac2 | 5462 | |
08f7aa3e | 5463 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 5464 | if (newheight == 0) |
7df02016 | 5465 | newheight = FRAME_LINES (f); |
ae19c6f2 | 5466 | if (newwidth == 0) |
7df02016 | 5467 | newwidth = FRAME_COLS (f); |
3826ea1a | 5468 | |
3b95a6f9 | 5469 | /* Compute width of windows in F. */ |
b6a65ac2 | 5470 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 5471 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 | 5472 | |
3b95a6f9 MR |
5473 | /* This is the width of the frame with vertical scroll bars and fringe |
5474 | columns. Do this after rounding - see discussion of bug#9723. */ | |
5475 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); | |
5476 | ||
b6a65ac2 | 5477 | /* If we're not changing the frame size, quit now. */ |
3b95a6f9 MR |
5478 | /* Frame width may be unchanged but the text portion may change, for |
5479 | example, fullscreen and remove/add scroll bar. */ | |
7df02016 | 5480 | if (newheight == FRAME_LINES (f) |
3b95a6f9 MR |
5481 | /* Text portion unchanged? */ |
5482 | && newwidth == FRAME_COLS (f) | |
5483 | /* Frame width unchanged? */ | |
5484 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) | |
4588ec20 JB |
5485 | return; |
5486 | ||
4d7e6e51 | 5487 | block_input (); |
cbb95688 | 5488 | |
886a8a6c KH |
5489 | #ifdef MSDOS |
5490 | /* We only can set screen dimensions to certain values supported | |
5491 | by our video hardware. Try to find the smallest size greater | |
5492 | or equal to the requested dimensions. */ | |
5493 | dos_set_window_size (&newheight, &newwidth); | |
5494 | #endif | |
5495 | ||
7df02016 | 5496 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 5497 | { |
562dd5e9 | 5498 | resize_frame_windows (f, newheight, 0); |
b6a65ac2 | 5499 | |
48e482e6 EZ |
5500 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5501 | manipulating video hardware. */ | |
5502 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5503 | FrameRows (FRAME_TTY (f)) = newheight; |
4588ec20 JB |
5504 | } |
5505 | ||
7df02016 | 5506 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 5507 | { |
562dd5e9 | 5508 | resize_frame_windows (f, new_frame_total_cols, 1); |
4588ec20 | 5509 | |
48e482e6 EZ |
5510 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5511 | manipulating video hardware. */ | |
5512 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5513 | FrameCols (FRAME_TTY (f)) = newwidth; |
5f5c8ee5 | 5514 | |
742516e0 | 5515 | #if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS) |
e69b0960 | 5516 | if (WINDOWP (f->tool_bar_window)) |
5f24fa51 | 5517 | XWINDOW (f->tool_bar_window)->total_cols = newwidth; |
742516e0 | 5518 | #endif |
4588ec20 JB |
5519 | } |
5520 | ||
7df02016 KS |
5521 | FRAME_LINES (f) = newheight; |
5522 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 5523 | |
5f5c8ee5 GM |
5524 | { |
5525 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
5526 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 5527 | |
5f5c8ee5 GM |
5528 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
5529 | &text_area_height); | |
5530 | if (w->cursor.x >= text_area_x + text_area_width) | |
5531 | w->cursor.hpos = w->cursor.x = 0; | |
5532 | if (w->cursor.y >= text_area_y + text_area_height) | |
5533 | w->cursor.vpos = w->cursor.y = 0; | |
5534 | } | |
986e61b8 | 5535 | |
bd0443bb | 5536 | adjust_frame_glyphs (f); |
5f5c8ee5 | 5537 | calculate_costs (f); |
cb02fa39 GM |
5538 | SET_FRAME_GARBAGED (f); |
5539 | f->resized_p = 1; | |
97cf50e7 | 5540 | |
4d7e6e51 | 5541 | unblock_input (); |
61730a69 | 5542 | |
66322887 | 5543 | record_unwind_current_buffer (); |
e523f7e5 | 5544 | |
ef264c42 | 5545 | run_window_configuration_change_hook (f); |
e523f7e5 RS |
5546 | |
5547 | unbind_to (count, Qnil); | |
4588ec20 | 5548 | } |
5f5c8ee5 GM |
5549 | |
5550 | ||
4588ec20 | 5551 | \f |
5f5c8ee5 GM |
5552 | /*********************************************************************** |
5553 | Terminal Related Lisp Functions | |
5554 | ***********************************************************************/ | |
5555 | ||
5556 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 5557 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
5558 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
5559 | FILE = nil means just close any termscript file currently open. */) | |
5842a27b | 5560 | (Lisp_Object file) |
5f5c8ee5 | 5561 | { |
0b0d3e0b KL |
5562 | struct tty_display_info *tty; |
5563 | ||
7d2f1216 EZ |
5564 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ()) |
5565 | && ! FRAME_MSDOS_P (SELECTED_FRAME ())) | |
0b0d3e0b KL |
5566 | error ("Current frame is not on a tty device"); |
5567 | ||
5568 | tty = CURTTY (); | |
5569 | ||
5570 | if (tty->termscript != 0) | |
406af475 PE |
5571 | { |
5572 | block_input (); | |
5573 | fclose (tty->termscript); | |
5574 | tty->termscript = 0; | |
5575 | unblock_input (); | |
5576 | } | |
5f5c8ee5 GM |
5577 | |
5578 | if (! NILP (file)) | |
5579 | { | |
5580 | file = Fexpand_file_name (file, Qnil); | |
406af475 | 5581 | tty->termscript = emacs_fopen (SSDATA (file), "w"); |
0b0d3e0b | 5582 | if (tty->termscript == 0) |
a9757f6a | 5583 | report_file_error ("Opening termscript", file); |
5f5c8ee5 GM |
5584 | } |
5585 | return Qnil; | |
5586 | } | |
5587 | ||
5588 | ||
4588ec20 | 5589 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
62af879c | 5590 | Ssend_string_to_terminal, 1, 2, 0, |
7ee72033 | 5591 | doc: /* Send STRING to the terminal without alteration. |
62af879c KL |
5592 | Control characters in STRING will have terminal-dependent effects. |
5593 | ||
6ed8eeff | 5594 | Optional parameter TERMINAL specifies the tty terminal device to use. |
558759e4 AM |
5595 | It may be a terminal object, a frame, or nil for the terminal used by |
5596 | the currently selected frame. In batch mode, STRING is sent to stdout | |
5597 | when TERMINAL is nil. */) | |
5842a27b | 5598 | (Lisp_Object string, Lisp_Object terminal) |
4588ec20 | 5599 | { |
7cef7ce3 SM |
5600 | struct terminal *t = get_terminal (terminal, 1); |
5601 | FILE *out; | |
0b0d3e0b | 5602 | |
94f3db62 | 5603 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 5604 | CHECK_STRING (string); |
4d7e6e51 | 5605 | block_input (); |
0b0d3e0b | 5606 | |
6ed8eeff KL |
5607 | if (!t) |
5608 | error ("Unknown terminal device"); | |
0b0d3e0b | 5609 | |
7cef7ce3 SM |
5610 | if (t->type == output_initial) |
5611 | out = stdout; | |
5612 | else if (t->type != output_termcap && t->type != output_msdos_raw) | |
5613 | error ("Device %d is not a termcap terminal device", t->id); | |
5614 | else | |
5615 | { | |
5616 | struct tty_display_info *tty = t->display_info.tty; | |
3fc809e2 | 5617 | |
7cef7ce3 SM |
5618 | if (! tty->output) |
5619 | error ("Terminal is currently suspended"); | |
cecfdea6 | 5620 | |
7cef7ce3 SM |
5621 | if (tty->termscript) |
5622 | { | |
5623 | fwrite (SDATA (string), 1, SBYTES (string), tty->termscript); | |
5624 | fflush (tty->termscript); | |
5625 | } | |
5626 | out = tty->output; | |
4588ec20 | 5627 | } |
7cef7ce3 SM |
5628 | fwrite (SDATA (string), 1, SBYTES (string), out); |
5629 | fflush (out); | |
4d7e6e51 | 5630 | unblock_input (); |
4588ec20 JB |
5631 | return Qnil; |
5632 | } | |
5633 | ||
5f5c8ee5 | 5634 | |
a7ca3326 | 5635 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 5636 | doc: /* Beep, or flash the screen. |
228299fa | 5637 | Also, unless an argument is given, |
7ee72033 | 5638 | terminate any keyboard macro currently executing. */) |
5842a27b | 5639 | (Lisp_Object arg) |
4588ec20 | 5640 | { |
efb859b4 | 5641 | if (!NILP (arg)) |
4588ec20 | 5642 | { |
7fa788da RS |
5643 | if (noninteractive) |
5644 | putchar (07); | |
5645 | else | |
385ed61f | 5646 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5647 | } |
5648 | else | |
5649 | bitch_at_user (); | |
5650 | ||
5651 | return Qnil; | |
5652 | } | |
5653 | ||
dfcf069d | 5654 | void |
971de7fb | 5655 | bitch_at_user (void) |
4588ec20 JB |
5656 | { |
5657 | if (noninteractive) | |
5658 | putchar (07); | |
5f5c8ee5 | 5659 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
81519fd2 SM |
5660 | { |
5661 | const char *msg | |
5662 | = "Keyboard macro terminated by a command ringing the bell"; | |
6c6f1994 | 5663 | Fsignal (Quser_error, list1 (build_string (msg))); |
81519fd2 | 5664 | } |
4588ec20 | 5665 | else |
385ed61f | 5666 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5667 | } |
5668 | ||
5f5c8ee5 GM |
5669 | |
5670 | \f | |
5671 | /*********************************************************************** | |
5672 | Sleeping, Waiting | |
5673 | ***********************************************************************/ | |
5674 | ||
a7ca3326 | 5675 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 5676 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
5677 | SECONDS may be a floating-point value, meaning that you can wait for a |
5678 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
d35af63c | 5679 | additional wait period, in milliseconds; this is for backwards compatibility. |
7ee72033 | 5680 | \(Not all operating systems support waiting for a fraction of a second.) */) |
5842a27b | 5681 | (Lisp_Object seconds, Lisp_Object milliseconds) |
4588ec20 | 5682 | { |
d311d28c | 5683 | double duration = extract_float (seconds); |
4588ec20 | 5684 | |
d311d28c PE |
5685 | if (!NILP (milliseconds)) |
5686 | { | |
5687 | CHECK_NUMBER (milliseconds); | |
5688 | duration += XINT (milliseconds) / 1000.0; | |
5689 | } | |
b07646f5 | 5690 | |
908589fd | 5691 | if (duration > 0) |
d35af63c | 5692 | { |
43aac990 PE |
5693 | struct timespec t = dtotimespec (duration); |
5694 | wait_reading_process_output (min (t.tv_sec, WAIT_READING_MAX), | |
5695 | t.tv_nsec, 0, 0, Qnil, NULL, 0); | |
d35af63c | 5696 | } |
4588ec20 JB |
5697 | |
5698 | return Qnil; | |
5699 | } | |
5700 | ||
5f5c8ee5 | 5701 | |
dcd1ca45 | 5702 | /* This is just like wait_reading_process_output, except that |
902b9b6d | 5703 | it does redisplay. |
f76475ad | 5704 | |
2bcac766 CY |
5705 | TIMEOUT is number of seconds to wait (float or integer), |
5706 | or t to wait forever. | |
59ea14cd | 5707 | READING is true if reading input. |
9fa1de30 PE |
5708 | If DISPLAY_OPTION is >0 display process output while waiting. |
5709 | If DISPLAY_OPTION is >1 perform an initial redisplay before waiting. | |
902b9b6d | 5710 | */ |
4588ec20 | 5711 | |
f76475ad | 5712 | Lisp_Object |
9fa1de30 | 5713 | sit_for (Lisp_Object timeout, bool reading, int display_option) |
f76475ad | 5714 | { |
d35af63c PE |
5715 | intmax_t sec; |
5716 | int nsec; | |
9fa1de30 | 5717 | bool do_display = display_option > 0; |
f222369e | 5718 | |
902b9b6d | 5719 | swallow_events (do_display); |
ccddf474 | 5720 | |
902b9b6d | 5721 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 5722 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 5723 | return Qnil; |
4588ec20 | 5724 | |
9fa1de30 | 5725 | if (display_option > 1) |
902b9b6d KS |
5726 | redisplay_preserve_echo_area (2); |
5727 | ||
d35af63c | 5728 | if (INTEGERP (timeout)) |
2bcac766 | 5729 | { |
d35af63c | 5730 | sec = XINT (timeout); |
908589fd | 5731 | if (sec <= 0) |
d35af63c PE |
5732 | return Qt; |
5733 | nsec = 0; | |
2bcac766 | 5734 | } |
d35af63c | 5735 | else if (FLOATP (timeout)) |
d311d28c | 5736 | { |
d35af63c | 5737 | double seconds = XFLOAT_DATA (timeout); |
7216e43b | 5738 | if (! (0 < seconds)) |
d311d28c | 5739 | return Qt; |
d35af63c PE |
5740 | else |
5741 | { | |
43aac990 PE |
5742 | struct timespec t = dtotimespec (seconds); |
5743 | sec = min (t.tv_sec, WAIT_READING_MAX); | |
5744 | nsec = t.tv_nsec; | |
d35af63c PE |
5745 | } |
5746 | } | |
5747 | else if (EQ (timeout, Qt)) | |
5748 | { | |
5749 | sec = 0; | |
5750 | nsec = 0; | |
d311d28c | 5751 | } |
d35af63c PE |
5752 | else |
5753 | wrong_type_argument (Qnumberp, timeout); | |
5754 | ||
dfdb645c | 5755 | |
4a4bbad2 | 5756 | #ifdef USABLE_SIGIO |
f75beb47 | 5757 | gobble_input (); |
f76475ad JB |
5758 | #endif |
5759 | ||
d35af63c | 5760 | wait_reading_process_output (sec, nsec, reading ? -1 : 1, do_display, |
dcd1ca45 | 5761 | Qnil, NULL, 0); |
f76475ad | 5762 | |
4588ec20 JB |
5763 | return detect_input_pending () ? Qnil : Qt; |
5764 | } | |
5765 | ||
5f5c8ee5 | 5766 | |
a7ca3326 | 5767 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
025de85b CY |
5768 | doc: /* Perform redisplay. |
5769 | Optional arg FORCE, if non-nil, prevents redisplay from being | |
5770 | preempted by arriving input, even if `redisplay-dont-pause' is nil. | |
5771 | If `redisplay-dont-pause' is non-nil (the default), redisplay is never | |
5772 | preempted by arriving input, so FORCE does nothing. | |
5773 | ||
5774 | Return t if redisplay was performed, nil if redisplay was preempted | |
5775 | immediately by pending input. */) | |
5842a27b | 5776 | (Lisp_Object force) |
f76475ad | 5777 | { |
d311d28c | 5778 | ptrdiff_t count; |
659d9874 | 5779 | |
902b9b6d KS |
5780 | swallow_events (1); |
5781 | if ((detect_input_pending_run_timers (1) | |
01327edf | 5782 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
5783 | || !NILP (Vexecuting_kbd_macro)) |
5784 | return Qnil; | |
f76475ad | 5785 | |
01327edf KS |
5786 | count = SPECPDL_INDEX (); |
5787 | if (!NILP (force) && !redisplay_dont_pause) | |
5788 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 5789 | redisplay_preserve_echo_area (2); |
01327edf | 5790 | unbind_to (count, Qnil); |
7ba07a1a | 5791 | return Qt; |
f76475ad | 5792 | } |
5f5c8ee5 GM |
5793 | |
5794 | ||
5795 | \f | |
5796 | /*********************************************************************** | |
5797 | Other Lisp Functions | |
5798 | ***********************************************************************/ | |
5799 | ||
5800 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
5801 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 5802 | buffer-modified-flags. */ |
5f5c8ee5 GM |
5803 | |
5804 | static Lisp_Object frame_and_buffer_state; | |
5805 | ||
5806 | ||
5807 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 5808 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 5809 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
5810 | VARIABLE is a variable name whose value is either nil or a state vector |
5811 | that will be updated to contain all frames and buffers, | |
228299fa | 5812 | aside from buffers whose names start with space, |
44edd521 RS |
5813 | along with the buffers' read-only and modified flags. This allows a fast |
5814 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 5815 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
5816 | the current state. |
5817 | ||
5818 | If VARIABLE is nil, an internal variable is used. Users should not | |
5819 | pass nil for VARIABLE. */) | |
5842a27b | 5820 | (Lisp_Object variable) |
5f5c8ee5 | 5821 | { |
44edd521 | 5822 | Lisp_Object state, tail, frame, buf; |
086ca913 | 5823 | ptrdiff_t n, idx; |
5f5c8ee5 | 5824 | |
44edd521 RS |
5825 | if (! NILP (variable)) |
5826 | { | |
5827 | CHECK_SYMBOL (variable); | |
5828 | state = Fsymbol_value (variable); | |
5829 | if (! VECTORP (state)) | |
5830 | goto changed; | |
5831 | } | |
5832 | else | |
5833 | state = frame_and_buffer_state; | |
5834 | ||
086ca913 | 5835 | idx = 0; |
5f5c8ee5 GM |
5836 | FOR_EACH_FRAME (tail, frame) |
5837 | { | |
086ca913 | 5838 | if (idx == ASIZE (state)) |
44edd521 | 5839 | goto changed; |
086ca913 | 5840 | if (!EQ (AREF (state, idx++), frame)) |
5f5c8ee5 | 5841 | goto changed; |
086ca913 | 5842 | if (idx == ASIZE (state)) |
44edd521 | 5843 | goto changed; |
086ca913 | 5844 | if (!EQ (AREF (state, idx++), XFRAME (frame)->name)) |
5f5c8ee5 GM |
5845 | goto changed; |
5846 | } | |
44edd521 | 5847 | /* Check that the buffer info matches. */ |
8f3a2c26 | 5848 | FOR_EACH_LIVE_BUFFER (tail, buf) |
5f5c8ee5 | 5849 | { |
5f5c8ee5 | 5850 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 5851 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 5852 | continue; |
086ca913 | 5853 | if (idx == ASIZE (state)) |
44edd521 | 5854 | goto changed; |
086ca913 | 5855 | if (!EQ (AREF (state, idx++), buf)) |
5f5c8ee5 | 5856 | goto changed; |
086ca913 | 5857 | if (idx == ASIZE (state)) |
44edd521 | 5858 | goto changed; |
086ca913 | 5859 | if (!EQ (AREF (state, idx++), BVAR (XBUFFER (buf), read_only))) |
5f5c8ee5 | 5860 | goto changed; |
086ca913 | 5861 | if (idx == ASIZE (state)) |
44edd521 | 5862 | goto changed; |
086ca913 | 5863 | if (!EQ (AREF (state, idx++), Fbuffer_modified_p (buf))) |
5f5c8ee5 GM |
5864 | goto changed; |
5865 | } | |
086ca913 | 5866 | if (idx == ASIZE (state)) |
44edd521 | 5867 | goto changed; |
5f5c8ee5 | 5868 | /* Detect deletion of a buffer at the end of the list. */ |
086ca913 | 5869 | if (EQ (AREF (state, idx), Qlambda)) |
5f5c8ee5 | 5870 | return Qnil; |
44edd521 RS |
5871 | |
5872 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 5873 | changed: |
44edd521 RS |
5874 | /* Count the size we will need. |
5875 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
5876 | n = 1; |
5877 | FOR_EACH_FRAME (tail, frame) | |
5878 | n += 2; | |
8f3a2c26 | 5879 | FOR_EACH_LIVE_BUFFER (tail, buf) |
5f5c8ee5 | 5880 | n += 3; |
44edd521 RS |
5881 | /* Reallocate the vector if data has grown to need it, |
5882 | or if it has shrunk a lot. */ | |
5883 | if (! VECTORP (state) | |
77b37c05 PE |
5884 | || n > ASIZE (state) |
5885 | || n + 20 < ASIZE (state) / 2) | |
5f5c8ee5 | 5886 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
5887 | { |
5888 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
5889 | if (! NILP (variable)) | |
5890 | Fset (variable, state); | |
5891 | else | |
5892 | frame_and_buffer_state = state; | |
5893 | } | |
5894 | ||
5895 | /* Record the new data in the (possibly reallocated) vector. */ | |
086ca913 | 5896 | idx = 0; |
5f5c8ee5 GM |
5897 | FOR_EACH_FRAME (tail, frame) |
5898 | { | |
086ca913 DA |
5899 | ASET (state, idx, frame); |
5900 | idx++; | |
5901 | ASET (state, idx, XFRAME (frame)->name); | |
5902 | idx++; | |
5f5c8ee5 | 5903 | } |
8f3a2c26 | 5904 | FOR_EACH_LIVE_BUFFER (tail, buf) |
5f5c8ee5 | 5905 | { |
5f5c8ee5 | 5906 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 5907 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 5908 | continue; |
086ca913 DA |
5909 | ASET (state, idx, buf); |
5910 | idx++; | |
5911 | ASET (state, idx, BVAR (XBUFFER (buf), read_only)); | |
5912 | idx++; | |
5913 | ASET (state, idx, Fbuffer_modified_p (buf)); | |
5914 | idx++; | |
5f5c8ee5 GM |
5915 | } |
5916 | /* Fill up the vector with lambdas (always at least one). */ | |
086ca913 DA |
5917 | ASET (state, idx, Qlambda); |
5918 | idx++; | |
5919 | while (idx < ASIZE (state)) | |
5920 | { | |
5921 | ASET (state, idx, Qlambda); | |
5922 | idx++; | |
5923 | } | |
5f5c8ee5 | 5924 | /* Make sure we didn't overflow the vector. */ |
086ca913 | 5925 | eassert (idx <= ASIZE (state)); |
5f5c8ee5 GM |
5926 | return Qt; |
5927 | } | |
5928 | ||
5929 | ||
4588ec20 | 5930 | \f |
5f5c8ee5 GM |
5931 | /*********************************************************************** |
5932 | Initialization | |
5933 | ***********************************************************************/ | |
5934 | ||
5f5c8ee5 GM |
5935 | /* Initialization done when Emacs fork is started, before doing stty. |
5936 | Determine terminal type and set terminal_driver. Then invoke its | |
5937 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 5938 | |
dfcf069d | 5939 | void |
971de7fb | 5940 | init_display (void) |
4588ec20 | 5941 | { |
28d440ab KL |
5942 | char *terminal_type; |
5943 | ||
5f5c8ee5 GM |
5944 | /* Construct the space glyph. */ |
5945 | space_glyph.type = CHAR_GLYPH; | |
3fc809e2 | 5946 | SET_CHAR_GLYPH (space_glyph, ' ', DEFAULT_FACE_ID, 0); |
5f5c8ee5 GM |
5947 | space_glyph.charpos = -1; |
5948 | ||
4588ec20 JB |
5949 | inverse_video = 0; |
5950 | cursor_in_echo_area = 0; | |
4588ec20 | 5951 | |
1315c181 JB |
5952 | /* Now is the time to initialize this; it's used by init_sys_modes |
5953 | during startup. */ | |
2246281f | 5954 | Vinitial_window_system = Qnil; |
4588ec20 | 5955 | |
4181ad9c KL |
5956 | /* SIGWINCH needs to be handled no matter what display we start |
5957 | with. Otherwise newly opened tty frames will not resize | |
5958 | automatically. */ | |
5959 | #ifdef SIGWINCH | |
5960 | #ifndef CANNOT_DUMP | |
5961 | if (initialized) | |
5962 | #endif /* CANNOT_DUMP */ | |
2fe28299 PE |
5963 | { |
5964 | struct sigaction action; | |
5965 | emacs_sigaction_init (&action, deliver_window_change_signal); | |
5966 | sigaction (SIGWINCH, &action, 0); | |
5967 | } | |
4181ad9c | 5968 | #endif /* SIGWINCH */ |
4588ec20 | 5969 | |
d6ef42b9 | 5970 | /* If running as a daemon, no need to initialize any frames/terminal. */ |
ff808935 DN |
5971 | if (IS_DAEMON) |
5972 | return; | |
d6ef42b9 | 5973 | |
1315c181 JB |
5974 | /* If the user wants to use a window system, we shouldn't bother |
5975 | initializing the terminal. This is especially important when the | |
5976 | terminal is so dumb that emacs gives up before and doesn't bother | |
5977 | using the window system. | |
4588ec20 | 5978 | |
36bbad1d KH |
5979 | If the DISPLAY environment variable is set and nonempty, |
5980 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
5981 | |
5982 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 5983 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 5984 | { |
36bbad1d | 5985 | char *display; |
36bbad1d | 5986 | display = getenv ("DISPLAY"); |
36bbad1d | 5987 | display_arg = (display != 0 && *display != 0); |
c1fc674b AS |
5988 | |
5989 | if (display_arg && !x_display_ok (display)) | |
5990 | { | |
5991 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
5992 | display); | |
5993 | inhibit_window_system = 1; | |
5994 | } | |
f040093a | 5995 | } |
d460af17 | 5996 | |
4fcc2638 | 5997 | if (!inhibit_window_system && display_arg) |
4588ec20 | 5998 | { |
111d9af3 | 5999 | Vinitial_window_system = Qx; |
4588ec20 JB |
6000 | #ifdef HAVE_X11 |
6001 | Vwindow_system_version = make_number (11); | |
039e5d71 | 6002 | #endif |
a29c3e6d | 6003 | #ifdef USE_NCURSES |
039e5d71 | 6004 | /* In some versions of ncurses, |
6a428f77 | 6005 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6006 | So call tgetent. */ |
6007 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 JB |
6008 | #endif |
6009 | return; | |
6010 | } | |
6011 | #endif /* HAVE_X_WINDOWS */ | |
6012 | ||
fd2e066a | 6013 | #ifdef HAVE_NTGUI |
177c0ea7 | 6014 | if (!inhibit_window_system) |
fd2e066a | 6015 | { |
111d9af3 | 6016 | Vinitial_window_system = Qw32; |
fd2e066a GV |
6017 | Vwindow_system_version = make_number (1); |
6018 | return; | |
6019 | } | |
6020 | #endif /* HAVE_NTGUI */ | |
6021 | ||
edfda783 AR |
6022 | #ifdef HAVE_NS |
6023 | if (!inhibit_window_system | |
6024 | #ifndef CANNOT_DUMP | |
6025 | && initialized | |
6026 | #endif | |
6027 | ) | |
6028 | { | |
111d9af3 | 6029 | Vinitial_window_system = Qns; |
5e617bc2 | 6030 | Vwindow_system_version = make_number (10); |
edfda783 AR |
6031 | return; |
6032 | } | |
6033 | #endif | |
6034 | ||
4588ec20 JB |
6035 | /* If no window system has been specified, try to use the terminal. */ |
6036 | if (! isatty (0)) | |
d9df6f40 | 6037 | fatal ("standard input is not a tty"); |
4588ec20 | 6038 | |
6152361f JR |
6039 | #ifdef WINDOWSNT |
6040 | terminal_type = "w32console"; | |
6041 | #else | |
83be8524 | 6042 | terminal_type = getenv ("TERM"); |
6152361f | 6043 | #endif |
4588ec20 JB |
6044 | if (!terminal_type) |
6045 | { | |
5d12ff0b | 6046 | #ifdef HAVE_WINDOW_SYSTEM |
b9e590fc RS |
6047 | if (! inhibit_window_system) |
6048 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6049 | else |
6050 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6051 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
4588ec20 JB |
6052 | exit (1); |
6053 | } | |
6054 | ||
0a125897 | 6055 | { |
6ed8eeff | 6056 | struct terminal *t; |
3224dac1 KL |
6057 | struct frame *f = XFRAME (selected_frame); |
6058 | ||
322aea6d PE |
6059 | init_foreground_group (); |
6060 | ||
3224dac1 | 6061 | /* Open a display on the controlling tty. */ |
6ed8eeff | 6062 | t = init_tty (0, terminal_type, 1); /* Errors are fatal. */ |
3224dac1 KL |
6063 | |
6064 | /* Convert the initial frame to use the new display. */ | |
b04f5ad2 | 6065 | if (f->output_method != output_initial) |
1088b922 | 6066 | emacs_abort (); |
6ed8eeff KL |
6067 | f->output_method = t->type; |
6068 | f->terminal = t; | |
3224dac1 | 6069 | |
6ed8eeff | 6070 | t->reference_count++; |
7ac5dac9 EZ |
6071 | #ifdef MSDOS |
6072 | f->output_data.tty->display_info = &the_only_display_info; | |
6073 | #else | |
6074 | if (f->output_method == output_termcap) | |
6075 | create_tty_output (f); | |
6076 | #endif | |
6ed8eeff | 6077 | t->display_info.tty->top_frame = selected_frame; |
5b65d888 | 6078 | change_frame_size (XFRAME (selected_frame), |
6ed8eeff KL |
6079 | FrameRows (t->display_info.tty), |
6080 | FrameCols (t->display_info.tty), 0, 0, 1); | |
3224dac1 | 6081 | |
6ed8eeff KL |
6082 | /* Delete the initial terminal. */ |
6083 | if (--initial_terminal->reference_count == 0 | |
6084 | && initial_terminal->delete_terminal_hook) | |
6085 | (*initial_terminal->delete_terminal_hook) (initial_terminal); | |
2666355c KL |
6086 | |
6087 | /* Update frame parameters to reflect the new type. */ | |
6088 | Fmodify_frame_parameters | |
6c6f1994 PE |
6089 | (selected_frame, list1 (Fcons (Qtty_type, |
6090 | Ftty_type (selected_frame)))); | |
657ceaa0 | 6091 | if (t->display_info.tty->name) |
6c6f1994 PE |
6092 | Fmodify_frame_parameters |
6093 | (selected_frame, | |
6094 | list1 (Fcons (Qtty, build_string (t->display_info.tty->name)))); | |
657ceaa0 | 6095 | else |
6c6f1994 | 6096 | Fmodify_frame_parameters (selected_frame, list1 (Fcons (Qtty, Qnil))); |
0a125897 | 6097 | } |
3fc809e2 | 6098 | |
d86c299a | 6099 | { |
91fb7e1b | 6100 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6101 | int width = FRAME_TOTAL_COLS (sf); |
6102 | int height = FRAME_LINES (sf); | |
d86c299a | 6103 | |
5f5c8ee5 | 6104 | /* If these sizes are so big they cause overflow, just ignore the |
dfd153ae PE |
6105 | change. It's not clear what better we could do. The rest of |
6106 | the code assumes that (width + 2) * height * sizeof (struct glyph) | |
6107 | does not overflow and does not exceed PTRDIFF_MAX or SIZE_MAX. */ | |
e3c25c68 PE |
6108 | if (INT_ADD_RANGE_OVERFLOW (width, 2, INT_MIN, INT_MAX) |
6109 | || INT_MULTIPLY_RANGE_OVERFLOW (width + 2, height, INT_MIN, INT_MAX) | |
dfd153ae PE |
6110 | || (min (PTRDIFF_MAX, SIZE_MAX) / sizeof (struct glyph) |
6111 | < (width + 2) * height)) | |
1559a86d | 6112 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6113 | } |
6114 | ||
91fb7e1b | 6115 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6116 | |
5f5c8ee5 GM |
6117 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ |
6118 | if (initialized | |
6119 | && !noninteractive | |
2246281f | 6120 | && NILP (Vinitial_window_system)) |
2d764c78 EZ |
6121 | { |
6122 | /* For the initial frame, we don't have any way of knowing what | |
6123 | are the foreground and background colors of the terminal. */ | |
5e617bc2 | 6124 | struct frame *sf = SELECTED_FRAME (); |
2d764c78 | 6125 | |
f9d2fdc4 EZ |
6126 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
6127 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
6128 | call0 (intern ("tty-set-up-initial-frame-faces")); |
6129 | } | |
5f5c8ee5 GM |
6130 | } |
6131 | ||
6132 | ||
6133 | \f | |
6134 | /*********************************************************************** | |
6135 | Blinking cursor | |
6136 | ***********************************************************************/ | |
6137 | ||
c3f13540 | 6138 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 6139 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 6140 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
6141 | WINDOW nil means use the selected window. SHOW non-nil means |
6142 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 | 6143 | don't show a cursor. */) |
5842a27b | 6144 | (Lisp_Object window, Lisp_Object show) |
5f5c8ee5 | 6145 | { |
5f5c8ee5 GM |
6146 | /* Don't change cursor state while redisplaying. This could confuse |
6147 | output routines. */ | |
6148 | if (!redisplaying_p) | |
b9e9df47 | 6149 | decode_any_window (window)->cursor_off_p = NILP (show); |
5f5c8ee5 | 6150 | return Qnil; |
4588ec20 | 6151 | } |
5f5c8ee5 GM |
6152 | |
6153 | ||
5d7791b3 GM |
6154 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
6155 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 6156 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 | 6157 | WINDOW nil or omitted means report on the selected window. */) |
5842a27b | 6158 | (Lisp_Object window) |
5d7791b3 | 6159 | { |
b9e9df47 | 6160 | return decode_any_window (window)->cursor_off_p ? Qnil : Qt; |
5d7791b3 | 6161 | } |
4588ec20 | 6162 | \f |
5f5c8ee5 GM |
6163 | /*********************************************************************** |
6164 | Initialization | |
6165 | ***********************************************************************/ | |
6166 | ||
dfcf069d | 6167 | void |
971de7fb | 6168 | syms_of_display (void) |
4588ec20 | 6169 | { |
502b9b64 | 6170 | defsubr (&Sredraw_frame); |
4588ec20 | 6171 | defsubr (&Sredraw_display); |
078b3696 | 6172 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
6173 | defsubr (&Sopen_termscript); |
6174 | defsubr (&Sding); | |
7ba07a1a | 6175 | defsubr (&Sredisplay); |
4588ec20 JB |
6176 | defsubr (&Ssleep_for); |
6177 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 6178 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 6179 | defsubr (&Sinternal_show_cursor_p); |
4588ec20 | 6180 | |
e509cfa6 | 6181 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
6182 | defsubr (&Sdump_redisplay_history); |
6183 | #endif | |
6184 | ||
d1dad759 | 6185 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
6186 | staticpro (&frame_and_buffer_state); |
6187 | ||
cd3520a4 JB |
6188 | DEFSYM (Qdisplay_table, "display-table"); |
6189 | DEFSYM (Qredisplay_dont_pause, "redisplay-dont-pause"); | |
9cda4f7c | 6190 | |
29208e82 | 6191 | DEFVAR_INT ("baud-rate", baud_rate, |
025de85b | 6192 | doc: /* The output baud rate of the terminal. |
228299fa GM |
6193 | On most systems, changing this value will affect the amount of padding |
6194 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 6195 | |
29208e82 | 6196 | DEFVAR_BOOL ("inverse-video", inverse_video, |
025de85b | 6197 | doc: /* Non-nil means invert the entire frame display. |
228299fa | 6198 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 6199 | |
29208e82 | 6200 | DEFVAR_BOOL ("visible-bell", visible_bell, |
025de85b | 6201 | doc: /* Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
6202 | |
6203 | See also `ring-bell-function'. */); | |
177c0ea7 | 6204 | |
29208e82 | 6205 | DEFVAR_BOOL ("no-redraw-on-reenter", no_redraw_on_reenter, |
025de85b | 6206 | doc: /* Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
6207 | A non-nil value is useful if the terminal can automatically preserve |
6208 | Emacs's frame display when you reenter Emacs. | |
6209 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 6210 | |
29208e82 | 6211 | DEFVAR_LISP ("initial-window-system", Vinitial_window_system, |
2246281f | 6212 | doc: /* Name of the window system that Emacs uses for the first frame. |
89baa1df EZ |
6213 | The value is a symbol: |
6214 | nil for a termcap frame (a character-only terminal), | |
6215 | 'x' for an Emacs frame that is really an X window, | |
6216 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6217 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6218 | 'pc' for a direct-write MS-DOS frame. | |
6219 | ||
6220 | Use of this variable as a boolean is deprecated. Instead, | |
6221 | use `display-graphic-p' or any of the other `display-*-p' | |
6222 | predicates which report frame's specific UI-related capabilities. */); | |
177c0ea7 | 6223 | |
70b8d0a4 SM |
6224 | DEFVAR_KBOARD ("window-system", Vwindow_system, |
6225 | doc: /* Name of window system through which the selected frame is displayed. | |
89baa1df EZ |
6226 | The value is a symbol: |
6227 | nil for a termcap frame (a character-only terminal), | |
6228 | 'x' for an Emacs frame that is really an X window, | |
6229 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6230 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6231 | 'pc' for a direct-write MS-DOS frame. | |
6232 | ||
6233 | Use of this variable as a boolean is deprecated. Instead, | |
6234 | use `display-graphic-p' or any of the other `display-*-p' | |
6235 | predicates which report frame's specific UI-related capabilities. */); | |
70b8d0a4 | 6236 | |
29208e82 | 6237 | DEFVAR_LISP ("window-system-version", Vwindow_system_version, |
bacf09b4 | 6238 | doc: /* The version number of the window system in use. |
c22140f6 | 6239 | For X windows, this is 11. */); |
177c0ea7 | 6240 | |
29208e82 | 6241 | DEFVAR_BOOL ("cursor-in-echo-area", cursor_in_echo_area, |
bacf09b4 | 6242 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 6243 | |
29208e82 | 6244 | DEFVAR_LISP ("glyph-table", Vglyph_table, |
bacf09b4 | 6245 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
6246 | If not nil, this is a vector indexed by glyph code to define the glyph. |
6247 | Each element can be: | |
6248 | integer: a glyph code which this glyph is an alias for. | |
6249 | string: output this glyph using that string (not impl. in X windows). | |
6250 | nil: this glyph mod 524288 is the code of a character to output, | |
6251 | and this glyph / 524288 is the face number (see `face-id') to use | |
6252 | while outputting it. */); | |
4588ec20 JB |
6253 | Vglyph_table = Qnil; |
6254 | ||
29208e82 | 6255 | DEFVAR_LISP ("standard-display-table", Vstandard_display_table, |
bacf09b4 | 6256 | doc: /* Display table to use for buffers that specify none. |
228299fa | 6257 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
6258 | Vstandard_display_table = Qnil; |
6259 | ||
29208e82 | 6260 | DEFVAR_BOOL ("redisplay-dont-pause", redisplay_dont_pause, |
025de85b | 6261 | doc: /* Non-nil means display update isn't paused when input is detected. */); |
6bf7006f | 6262 | redisplay_dont_pause = 1; |
5f5c8ee5 | 6263 | |
4588ec20 JB |
6264 | #ifdef CANNOT_DUMP |
6265 | if (noninteractive) | |
6266 | #endif | |
6267 | { | |
2246281f | 6268 | Vinitial_window_system = Qnil; |
4588ec20 JB |
6269 | Vwindow_system_version = Qnil; |
6270 | } | |
6271 | } |