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 *); | |
5f5c8ee5 | 100 | |
59ea14cd | 101 | /* True means last display completed. False means it was preempted. */ |
4588ec20 | 102 | |
59ea14cd | 103 | bool display_completed; |
4588ec20 | 104 | |
e7067d00 | 105 | Lisp_Object Qdisplay_table, Qredisplay_dont_pause; |
5f5c8ee5 | 106 | |
59ea14cd | 107 | /* True means SIGWINCH happened when not safe. */ |
4588ec20 | 108 | |
59ea14cd | 109 | static bool delayed_size_change; |
4588ec20 | 110 | |
5f5c8ee5 | 111 | /* A glyph for a space. */ |
4588ec20 | 112 | |
5f5c8ee5 | 113 | struct glyph space_glyph; |
4588ec20 | 114 | |
f0b79313 DA |
115 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
116 | ||
5f5c8ee5 GM |
117 | /* Counts of allocated structures. These counts serve to diagnose |
118 | memory leaks and double frees. */ | |
4588ec20 | 119 | |
5bf46f05 PE |
120 | static int glyph_matrix_count; |
121 | static int glyph_pool_count; | |
4588ec20 | 122 | |
f0b79313 DA |
123 | #endif /* GLYPH_DEBUG and ENABLE_CHECKING */ |
124 | ||
5f5c8ee5 GM |
125 | /* If non-null, the frame whose frame matrices are manipulated. If |
126 | null, window matrices are worked on. */ | |
4588ec20 | 127 | |
5f5c8ee5 | 128 | static struct frame *frame_matrix_frame; |
4588ec20 | 129 | |
177c0ea7 | 130 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 131 | This may only be used for terminal frames. */ |
836d2cde | 132 | |
e509cfa6 | 133 | #ifdef GLYPH_DEBUG |
4588ec20 | 134 | |
f57e2426 J |
135 | static int window_to_frame_vpos (struct window *, int); |
136 | static int window_to_frame_hpos (struct window *, int); | |
5f5c8ee5 GM |
137 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) |
138 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 139 | |
9b0e97aa GM |
140 | /* One element of the ring buffer containing redisplay history |
141 | information. */ | |
142 | ||
143 | struct redisplay_history | |
144 | { | |
145 | char trace[512 + 100]; | |
146 | }; | |
147 | ||
148 | /* The size of the history buffer. */ | |
149 | ||
150 | #define REDISPLAY_HISTORY_SIZE 30 | |
151 | ||
152 | /* The redisplay history buffer. */ | |
153 | ||
154 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
155 | ||
156 | /* Next free entry in redisplay_history. */ | |
157 | ||
158 | static int history_idx; | |
159 | ||
160 | /* A tick that's incremented each time something is added to the | |
161 | history. */ | |
162 | ||
dfd153ae | 163 | static uprintmax_t history_tick; |
6a8aec41 | 164 | \f |
9b0e97aa GM |
165 | /* Add to the redisplay history how window W has been displayed. |
166 | MSG is a trace containing the information how W's glyph matrix | |
59ea14cd | 167 | has been constructed. PAUSED_P means that the update |
9b0e97aa GM |
168 | has been interrupted for pending input. */ |
169 | ||
170 | static void | |
59ea14cd | 171 | add_window_display_history (struct window *w, const char *msg, bool paused_p) |
9b0e97aa GM |
172 | { |
173 | char *buf; | |
29abe551 | 174 | void *ptr = w; |
177c0ea7 | 175 | |
9b0e97aa GM |
176 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
177 | history_idx = 0; | |
178 | buf = redisplay_history[history_idx].trace; | |
179 | ++history_idx; | |
177c0ea7 | 180 | |
8666506e PE |
181 | snprintf (buf, sizeof redisplay_history[0].trace, |
182 | "%"pMu": window %p (`%s')%s\n%s", | |
183 | history_tick++, | |
29abe551 | 184 | ptr, |
e74aeda8 DA |
185 | ((BUFFERP (w->contents) |
186 | && STRINGP (BVAR (XBUFFER (w->contents), name))) | |
187 | ? SSDATA (BVAR (XBUFFER (w->contents), name)) | |
8666506e PE |
188 | : "???"), |
189 | paused_p ? " ***paused***" : "", | |
190 | msg); | |
9b0e97aa GM |
191 | } |
192 | ||
193 | ||
194 | /* Add to the redisplay history that frame F has been displayed. | |
59ea14cd | 195 | PAUSED_P means that the update has been interrupted for |
9b0e97aa GM |
196 | pending input. */ |
197 | ||
198 | static void | |
59ea14cd | 199 | add_frame_display_history (struct frame *f, bool paused_p) |
9b0e97aa GM |
200 | { |
201 | char *buf; | |
29abe551 | 202 | void *ptr = f; |
177c0ea7 | 203 | |
9b0e97aa GM |
204 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
205 | history_idx = 0; | |
206 | buf = redisplay_history[history_idx].trace; | |
207 | ++history_idx; | |
177c0ea7 | 208 | |
dfd153ae | 209 | sprintf (buf, "%"pMu": update frame %p%s", |
9b0e97aa | 210 | history_tick++, |
29abe551 | 211 | ptr, paused_p ? " ***paused***" : ""); |
9b0e97aa GM |
212 | } |
213 | ||
214 | ||
a7ca3326 | 215 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, |
9b0e97aa | 216 | Sdump_redisplay_history, 0, 0, "", |
7ee72033 | 217 | doc: /* Dump redisplay history to stderr. */) |
5842a27b | 218 | (void) |
9b0e97aa GM |
219 | { |
220 | int i; | |
221 | ||
222 | for (i = history_idx - 1; i != history_idx; --i) | |
223 | { | |
224 | if (i < 0) | |
225 | i = REDISPLAY_HISTORY_SIZE - 1; | |
226 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
227 | } | |
228 | ||
229 | return Qnil; | |
230 | } | |
231 | ||
232 | ||
e509cfa6 | 233 | #else /* not GLYPH_DEBUG */ |
4588ec20 | 234 | |
7df02016 KS |
235 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
236 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 237 | |
e509cfa6 | 238 | #endif /* GLYPH_DEBUG */ |
4588ec20 | 239 | |
4588ec20 | 240 | |
9e4bf381 PE |
241 | #if (defined PROFILING \ |
242 | && (defined __FreeBSD__ || defined GNU_LINUX || defined __MINGW32__) \ | |
243 | && !HAVE___EXECUTABLE_START) | |
244 | /* This function comes first in the Emacs executable and is used only | |
245 | to estimate the text start for profiling. */ | |
4588ec20 | 246 | void |
9e4bf381 | 247 | __executable_start (void) |
4588ec20 | 248 | { |
1088b922 | 249 | emacs_abort (); |
177c0ea7 | 250 | } |
72af86bd | 251 | #endif |
5f5c8ee5 GM |
252 | \f |
253 | /*********************************************************************** | |
254 | Glyph Matrices | |
255 | ***********************************************************************/ | |
256 | ||
257 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
258 | pool from which memory for the matrix should be allocated, or null | |
259 | for window-based redisplay where no glyph pools are used. The | |
260 | member `pool' of the glyph matrix structure returned is set to | |
261 | POOL, the structure is otherwise zeroed. */ | |
262 | ||
5bf46f05 | 263 | static struct glyph_matrix * |
971de7fb | 264 | new_glyph_matrix (struct glyph_pool *pool) |
4588ec20 | 265 | { |
23f86fce | 266 | struct glyph_matrix *result = xzalloc (sizeof *result); |
4588ec20 | 267 | |
f0b79313 | 268 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
5f5c8ee5 GM |
269 | /* Increment number of allocated matrices. This count is used |
270 | to detect memory leaks. */ | |
271 | ++glyph_matrix_count; | |
f0b79313 | 272 | #endif |
4588ec20 | 273 | |
5f5c8ee5 GM |
274 | /* Set pool and return. */ |
275 | result->pool = pool; | |
276 | return result; | |
4588ec20 JB |
277 | } |
278 | ||
4588ec20 | 279 | |
5f5c8ee5 GM |
280 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
281 | ||
f0b79313 DA |
282 | If GLYPH_DEBUG and ENABLE_CHECKING are in effect, the global counter |
283 | glyph_matrix_count is decremented when a matrix is freed. If the count | |
284 | gets negative, more structures were freed than allocated, i.e. one matrix | |
285 | was freed more than once or a bogus pointer was passed to this function. | |
177c0ea7 | 286 | |
5f5c8ee5 GM |
287 | If MATRIX->pool is null, this means that the matrix manages its own |
288 | glyph memory---this is done for matrices on X frames. Freeing the | |
289 | matrix also frees the glyph memory in this case. */ | |
290 | ||
291 | static void | |
971de7fb | 292 | free_glyph_matrix (struct glyph_matrix *matrix) |
4588ec20 | 293 | { |
5f5c8ee5 GM |
294 | if (matrix) |
295 | { | |
296 | int i; | |
297 | ||
f0b79313 | 298 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
5f5c8ee5 GM |
299 | /* Detect the case that more matrices are freed than were |
300 | allocated. */ | |
f0b79313 DA |
301 | --glyph_matrix_count; |
302 | eassert (glyph_matrix_count >= 0); | |
303 | #endif | |
5f5c8ee5 GM |
304 | |
305 | /* Free glyph memory if MATRIX owns it. */ | |
306 | if (matrix->pool == NULL) | |
307 | for (i = 0; i < matrix->rows_allocated; ++i) | |
308 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 309 | |
5f5c8ee5 GM |
310 | /* Free row structures and the matrix itself. */ |
311 | xfree (matrix->rows); | |
312 | xfree (matrix); | |
313 | } | |
314 | } | |
4588ec20 | 315 | |
4588ec20 | 316 | |
5f5c8ee5 GM |
317 | /* Return the number of glyphs to reserve for a marginal area of |
318 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
319 | display line of window W. MARGIN gives the width of the marginal | |
eeaf9bf3 | 320 | area in canonical character units. */ |
5f5c8ee5 GM |
321 | |
322 | static int | |
eeaf9bf3 | 323 | margin_glyphs_to_reserve (struct window *w, int total_glyphs, int margin) |
5f5c8ee5 | 324 | { |
eeaf9bf3 | 325 | if (margin > 0) |
4588ec20 | 326 | { |
5f24fa51 | 327 | int width = w->total_cols; |
eeaf9bf3 | 328 | double d = max (0, margin); |
5f5c8ee5 | 329 | d = min (width / 2 - 1, d); |
eeaf9bf3 | 330 | return (int) ((double) total_glyphs / width * d); |
5f5c8ee5 | 331 | } |
eeaf9bf3 | 332 | return 0; |
5f5c8ee5 GM |
333 | } |
334 | ||
59ea14cd | 335 | /* Return true if ROW's hash value is correct. |
e509cfa6 DA |
336 | Optimized away if ENABLE_CHECKING is not defined. */ |
337 | ||
59ea14cd | 338 | static bool |
7a7270dd EZ |
339 | verify_row_hash (struct glyph_row *row) |
340 | { | |
015137db | 341 | return row->hash == row_hash (row); |
7a7270dd | 342 | } |
4588ec20 | 343 | |
5f5c8ee5 GM |
344 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
345 | window sizes. | |
4588ec20 | 346 | |
5f5c8ee5 GM |
347 | W is null if the function is called for a frame glyph matrix. |
348 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
349 | indices of the first column and row of MATRIX within the frame | |
350 | matrix, if such a matrix exists. They are zero for purely | |
351 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 352 | |
5f5c8ee5 GM |
353 | In window-based redisplay, where no frame matrices exist, glyph |
354 | matrices manage their own glyph storage. Otherwise, they allocate | |
355 | storage from a common frame glyph pool which can be found in | |
356 | MATRIX->pool. | |
23b0200c | 357 | |
5f5c8ee5 GM |
358 | The reason for this memory management strategy is to avoid complete |
359 | frame redraws if possible. When we allocate from a common pool, a | |
360 | change of the location or size of a sub-matrix within the pool | |
361 | requires a complete redisplay of the frame because we cannot easily | |
362 | make sure that the current matrices of all windows still agree with | |
363 | what is displayed on the screen. While this is usually fast, it | |
364 | leads to screen flickering. */ | |
23b0200c | 365 | |
5f5c8ee5 | 366 | static void |
971de7fb | 367 | adjust_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int x, int y, struct dim dim) |
5f5c8ee5 GM |
368 | { |
369 | int i; | |
370 | int new_rows; | |
59ea14cd PE |
371 | bool marginal_areas_changed_p = 0; |
372 | bool header_line_changed_p = 0; | |
373 | bool header_line_p = 0; | |
5f5c8ee5 | 374 | int left = -1, right = -1; |
ca8a12a7 | 375 | int window_width = -1, window_height = -1; |
5f5c8ee5 | 376 | |
6b61353c KH |
377 | /* See if W had a header line that has disappeared now, or vice versa. |
378 | Get W's size. */ | |
5f5c8ee5 GM |
379 | if (w) |
380 | { | |
c3c4768d | 381 | window_box (w, ANY_AREA, 0, 0, &window_width, &window_height); |
6b61353c | 382 | |
045dee35 GM |
383 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
384 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 385 | } |
045dee35 | 386 | matrix->header_line_p = header_line_p; |
23b0200c | 387 | |
6b61353c KH |
388 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
389 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
390 | haven't changed. This optimization is important because preserving |
391 | the matrix means preventing redisplay. */ | |
392 | if (matrix->pool == NULL) | |
393 | { | |
d3d50620 DA |
394 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
395 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
a54e2c05 | 396 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
397 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs |
398 | || right != matrix->right_margin_glyphs); | |
399 | ||
400 | if (!marginal_areas_changed_p | |
bd0443bb | 401 | && !XFRAME (w->frame)->fonts_changed |
045dee35 | 402 | && !header_line_changed_p |
7df02016 KS |
403 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
404 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
405 | && matrix->window_height == window_height |
406 | && matrix->window_vscroll == w->vscroll | |
407 | && matrix->window_width == window_width) | |
408 | return; | |
409 | } | |
177c0ea7 | 410 | |
5f5c8ee5 GM |
411 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
412 | if (matrix->rows_allocated < dim.height) | |
413 | { | |
0065d054 | 414 | int old_alloc = matrix->rows_allocated; |
5f5c8ee5 | 415 | new_rows = dim.height - matrix->rows_allocated; |
0065d054 PE |
416 | matrix->rows = xpalloc (matrix->rows, &matrix->rows_allocated, |
417 | new_rows, INT_MAX, sizeof *matrix->rows); | |
418 | memset (matrix->rows + old_alloc, 0, | |
419 | (matrix->rows_allocated - old_alloc) * sizeof *matrix->rows); | |
5f5c8ee5 GM |
420 | } |
421 | else | |
422 | new_rows = 0; | |
60a8948a | 423 | |
5f5c8ee5 GM |
424 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
425 | on a frame not using window-based redisplay. Set up pointers for | |
426 | each row into the glyph pool. */ | |
427 | if (matrix->pool) | |
428 | { | |
a54e2c05 | 429 | eassert (matrix->pool->glyphs); |
177c0ea7 | 430 | |
5f5c8ee5 | 431 | if (w) |
60a8948a | 432 | { |
5f5c8ee5 | 433 | left = margin_glyphs_to_reserve (w, dim.width, |
d3d50620 | 434 | w->left_margin_cols); |
5f5c8ee5 | 435 | right = margin_glyphs_to_reserve (w, dim.width, |
d3d50620 | 436 | w->right_margin_cols); |
60a8948a | 437 | } |
5f5c8ee5 GM |
438 | else |
439 | left = right = 0; | |
177c0ea7 | 440 | |
5f5c8ee5 | 441 | for (i = 0; i < dim.height; ++i) |
60a8948a | 442 | { |
5f5c8ee5 | 443 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
444 | |
445 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
446 | = (matrix->pool->glyphs |
447 | + (y + i) * matrix->pool->ncolumns | |
448 | + x); | |
177c0ea7 | 449 | |
5f5c8ee5 GM |
450 | if (w == NULL |
451 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 452 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
453 | { |
454 | row->glyphs[TEXT_AREA] | |
455 | = row->glyphs[LEFT_MARGIN_AREA]; | |
456 | row->glyphs[RIGHT_MARGIN_AREA] | |
457 | = row->glyphs[TEXT_AREA] + dim.width; | |
458 | row->glyphs[LAST_AREA] | |
459 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
460 | } | |
461 | else | |
462 | { | |
463 | row->glyphs[TEXT_AREA] | |
464 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
465 | row->glyphs[RIGHT_MARGIN_AREA] | |
466 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
467 | row->glyphs[LAST_AREA] | |
468 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
469 | } | |
60a8948a | 470 | } |
177c0ea7 | 471 | |
5f5c8ee5 GM |
472 | matrix->left_margin_glyphs = left; |
473 | matrix->right_margin_glyphs = right; | |
474 | } | |
475 | else | |
476 | { | |
477 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
6b61353c KH |
478 | its own memory. It is a window matrix for window-based redisplay. |
479 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
480 | if (dim.width > matrix->matrix_w |
481 | || new_rows | |
045dee35 | 482 | || header_line_changed_p |
5f5c8ee5 | 483 | || marginal_areas_changed_p) |
4588ec20 | 484 | { |
5f5c8ee5 GM |
485 | struct glyph_row *row = matrix->rows; |
486 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 487 | |
5f5c8ee5 GM |
488 | while (row < end) |
489 | { | |
490 | row->glyphs[LEFT_MARGIN_AREA] | |
0065d054 PE |
491 | = xnrealloc (row->glyphs[LEFT_MARGIN_AREA], |
492 | dim.width, sizeof (struct glyph)); | |
177c0ea7 | 493 | |
5f5c8ee5 GM |
494 | /* The mode line never has marginal areas. */ |
495 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 496 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
497 | { |
498 | row->glyphs[TEXT_AREA] | |
499 | = row->glyphs[LEFT_MARGIN_AREA]; | |
500 | row->glyphs[RIGHT_MARGIN_AREA] | |
501 | = row->glyphs[TEXT_AREA] + dim.width; | |
502 | row->glyphs[LAST_AREA] | |
503 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
504 | } | |
505 | else | |
506 | { | |
507 | row->glyphs[TEXT_AREA] | |
508 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
509 | row->glyphs[RIGHT_MARGIN_AREA] | |
510 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
511 | row->glyphs[LAST_AREA] | |
512 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
513 | } | |
514 | ++row; | |
515 | } | |
4588ec20 JB |
516 | } |
517 | ||
a54e2c05 | 518 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
519 | matrix->left_margin_glyphs = left; |
520 | matrix->right_margin_glyphs = right; | |
521 | } | |
177c0ea7 | 522 | |
5f5c8ee5 GM |
523 | /* Number of rows to be used by MATRIX. */ |
524 | matrix->nrows = dim.height; | |
a54e2c05 | 525 | eassert (matrix->nrows >= 0); |
5f5c8ee5 | 526 | |
b7b20fbd | 527 | if (w) |
5f5c8ee5 | 528 | { |
b7b20fbd | 529 | if (matrix == w->current_matrix) |
4588ec20 | 530 | { |
b7b20fbd GM |
531 | /* Mark rows in a current matrix of a window as not having |
532 | valid contents. It's important to not do this for | |
533 | desired matrices. When Emacs starts, it may already be | |
534 | building desired matrices when this function runs. */ | |
535 | if (window_width < 0) | |
536 | window_width = window_box_width (w, -1); | |
177c0ea7 | 537 | |
b7b20fbd GM |
538 | /* Optimize the case that only the height has changed (C-x 2, |
539 | upper window). Invalidate all rows that are no longer part | |
540 | of the window. */ | |
541 | if (!marginal_areas_changed_p | |
73d75a62 GM |
542 | && !header_line_changed_p |
543 | && new_rows == 0 | |
544 | && dim.width == matrix->matrix_w | |
7df02016 KS |
545 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
546 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 547 | && matrix->window_width == window_width) |
b7b20fbd | 548 | { |
dd42b31a GM |
549 | /* Find the last row in the window. */ |
550 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
551 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
552 | { | |
26447967 | 553 | ++i; |
dd42b31a GM |
554 | break; |
555 | } | |
b7b20fbd GM |
556 | |
557 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 558 | are invalidated below. */ |
02455cb6 | 559 | if (w->window_end_vpos >= i) |
9d93ce29 | 560 | w->window_end_valid = 0; |
177c0ea7 | 561 | |
b7b20fbd GM |
562 | while (i < matrix->nrows) |
563 | matrix->rows[i++].enabled_p = 0; | |
564 | } | |
565 | else | |
566 | { | |
567 | for (i = 0; i < matrix->nrows; ++i) | |
568 | matrix->rows[i].enabled_p = 0; | |
569 | } | |
5f5c8ee5 | 570 | } |
b7b20fbd | 571 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 572 | { |
b7b20fbd GM |
573 | /* Rows in desired matrices always have to be cleared; |
574 | redisplay expects this is the case when it runs, so it | |
575 | had better be the case when we adjust matrices between | |
576 | redisplays. */ | |
5f5c8ee5 GM |
577 | for (i = 0; i < matrix->nrows; ++i) |
578 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 579 | } |
4588ec20 | 580 | } |
177c0ea7 JB |
581 | |
582 | ||
5f5c8ee5 GM |
583 | /* Remember last values to be able to optimize frame redraws. */ |
584 | matrix->matrix_x = x; | |
585 | matrix->matrix_y = y; | |
586 | matrix->matrix_w = dim.width; | |
587 | matrix->matrix_h = dim.height; | |
588 | ||
589 | /* Record the top y location and height of W at the time the matrix | |
590 | was last adjusted. This is used to optimize redisplay above. */ | |
591 | if (w) | |
4588ec20 | 592 | { |
7df02016 KS |
593 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
594 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
595 | matrix->window_height = window_height; |
596 | matrix->window_width = window_width; | |
597 | matrix->window_vscroll = w->vscroll; | |
598 | } | |
599 | } | |
4588ec20 | 600 | |
4588ec20 | 601 | |
5f5c8ee5 GM |
602 | /* Reverse the contents of rows in MATRIX between START and END. The |
603 | contents of the row at END - 1 end up at START, END - 2 at START + | |
604 | 1 etc. This is part of the implementation of rotate_matrix (see | |
605 | below). */ | |
d52bad65 | 606 | |
5f5c8ee5 | 607 | static void |
971de7fb | 608 | reverse_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 GM |
609 | { |
610 | int i, j; | |
23b0200c | 611 | |
5f5c8ee5 GM |
612 | for (i = start, j = end - 1; i < j; ++i, --j) |
613 | { | |
614 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
615 | initialization. */ | |
616 | struct glyph_row temp; | |
617 | temp = matrix->rows[i]; | |
618 | matrix->rows[i] = matrix->rows[j]; | |
619 | matrix->rows[j] = temp; | |
620 | } | |
621 | } | |
23b0200c | 622 | |
23b0200c | 623 | |
5f5c8ee5 GM |
624 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
625 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
626 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
627 | row structures are moved around). | |
60a8948a | 628 | |
5f5c8ee5 GM |
629 | The algorithm used for rotating the vector was, I believe, first |
630 | described by Kernighan. See the vector R as consisting of two | |
631 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
632 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
633 | and reverse the result to get (ArBr)r which is BA. Similar for | |
634 | rotating right. */ | |
635 | ||
636 | void | |
971de7fb | 637 | rotate_matrix (struct glyph_matrix *matrix, int first, int last, int by) |
5f5c8ee5 GM |
638 | { |
639 | if (by < 0) | |
640 | { | |
641 | /* Up (rotate left, i.e. towards lower indices). */ | |
642 | by = -by; | |
643 | reverse_rows (matrix, first, first + by); | |
644 | reverse_rows (matrix, first + by, last); | |
645 | reverse_rows (matrix, first, last); | |
646 | } | |
647 | else if (by > 0) | |
648 | { | |
649 | /* Down (rotate right, i.e. towards higher indices). */ | |
650 | reverse_rows (matrix, last - by, last); | |
651 | reverse_rows (matrix, first, last - by); | |
652 | reverse_rows (matrix, first, last); | |
653 | } | |
654 | } | |
655 | ||
656 | ||
657 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
658 | with indices START <= index < END. Increment positions by DELTA/ | |
659 | DELTA_BYTES. */ | |
660 | ||
661 | void | |
ace1712c | 662 | increment_matrix_positions (struct glyph_matrix *matrix, int start, int end, |
d311d28c | 663 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
664 | { |
665 | /* Check that START and END are reasonable values. */ | |
a54e2c05 DA |
666 | eassert (start >= 0 && start <= matrix->nrows); |
667 | eassert (end >= 0 && end <= matrix->nrows); | |
668 | eassert (start <= end); | |
5f5c8ee5 GM |
669 | |
670 | for (; start < end; ++start) | |
86c11ba1 | 671 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
672 | } |
673 | ||
674 | ||
59ea14cd PE |
675 | /* Clear the enable_p flags in a range of rows in glyph matrix MATRIX. |
676 | START and END are the row indices of the first and last + 1 row to clear. */ | |
5f5c8ee5 GM |
677 | |
678 | void | |
59ea14cd | 679 | clear_glyph_matrix_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 | 680 | { |
a54e2c05 DA |
681 | eassert (start <= end); |
682 | eassert (start >= 0 && start < matrix->nrows); | |
683 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 684 | |
5f5c8ee5 | 685 | for (; start < end; ++start) |
59ea14cd | 686 | matrix->rows[start].enabled_p = 0; |
5f5c8ee5 GM |
687 | } |
688 | ||
689 | ||
690 | /* Clear MATRIX. | |
691 | ||
59ea14cd PE |
692 | Empty all rows in MATRIX by clearing their enabled_p flags. |
693 | The function prepare_desired_row will eventually really clear a row | |
694 | when it sees one with a false enabled_p flag. | |
5f5c8ee5 | 695 | |
59ea14cd | 696 | Reset update hints to default values. The only update hint |
5f5c8ee5 GM |
697 | currently present is the flag MATRIX->no_scrolling_p. */ |
698 | ||
699 | void | |
971de7fb | 700 | clear_glyph_matrix (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
701 | { |
702 | if (matrix) | |
703 | { | |
59ea14cd | 704 | clear_glyph_matrix_rows (matrix, 0, matrix->nrows); |
5f5c8ee5 GM |
705 | matrix->no_scrolling_p = 0; |
706 | } | |
707 | } | |
177c0ea7 | 708 | |
5f5c8ee5 GM |
709 | |
710 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
711 | Increment y-positions in glyph rows between START and END by DY, | |
712 | and recompute their visible height. */ | |
713 | ||
714 | void | |
971de7fb | 715 | shift_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int start, int end, int dy) |
5f5c8ee5 GM |
716 | { |
717 | int min_y, max_y; | |
177c0ea7 | 718 | |
a54e2c05 DA |
719 | eassert (start <= end); |
720 | eassert (start >= 0 && start < matrix->nrows); | |
721 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 722 | |
7df02016 KS |
723 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
724 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 725 | |
5f5c8ee5 GM |
726 | for (; start < end; ++start) |
727 | { | |
728 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 729 | |
5f5c8ee5 | 730 | row->y += dy; |
d6c747a4 | 731 | row->visible_height = row->height; |
177c0ea7 | 732 | |
5f5c8ee5 | 733 | if (row->y < min_y) |
d6c747a4 GM |
734 | row->visible_height -= min_y - row->y; |
735 | if (row->y + row->height > max_y) | |
736 | row->visible_height -= row->y + row->height - max_y; | |
e61124cd YM |
737 | if (row->fringe_bitmap_periodic_p) |
738 | row->redraw_fringe_bitmaps_p = 1; | |
5f5c8ee5 GM |
739 | } |
740 | } | |
741 | ||
742 | ||
743 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
744 | invalid is done by setting enabled_p to zero for all rows in a | |
745 | current matrix. */ | |
746 | ||
747 | void | |
971de7fb | 748 | clear_current_matrices (register struct frame *f) |
5f5c8ee5 GM |
749 | { |
750 | /* Clear frame current matrix, if we have one. */ | |
751 | if (f->current_matrix) | |
752 | clear_glyph_matrix (f->current_matrix); | |
753 | ||
5a49b79c | 754 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
755 | /* Clear the matrix of the menu bar window, if such a window exists. |
756 | The menu bar window is currently used to display menus on X when | |
757 | no toolkit support is compiled in. */ | |
e69b0960 DA |
758 | if (WINDOWP (f->menu_bar_window)) |
759 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
5a49b79c | 760 | #endif |
5f5c8ee5 | 761 | |
742516e0 | 762 | #if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS) |
9ea173e8 | 763 | /* Clear the matrix of the tool-bar window, if any. */ |
e69b0960 DA |
764 | if (WINDOWP (f->tool_bar_window)) |
765 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
742516e0 | 766 | #endif |
5f5c8ee5 GM |
767 | |
768 | /* Clear current window matrices. */ | |
a54e2c05 | 769 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
770 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); |
771 | } | |
772 | ||
773 | ||
774 | /* Clear out all display lines of F for a coming redisplay. */ | |
775 | ||
776 | void | |
971de7fb | 777 | clear_desired_matrices (register struct frame *f) |
5f5c8ee5 GM |
778 | { |
779 | if (f->desired_matrix) | |
780 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 781 | |
5a49b79c | 782 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
e69b0960 DA |
783 | if (WINDOWP (f->menu_bar_window)) |
784 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
5a49b79c | 785 | #endif |
5f5c8ee5 | 786 | |
742516e0 | 787 | #if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS) |
e69b0960 DA |
788 | if (WINDOWP (f->tool_bar_window)) |
789 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
742516e0 | 790 | #endif |
5f5c8ee5 GM |
791 | |
792 | /* Do it for window matrices. */ | |
a54e2c05 | 793 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
794 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); |
795 | } | |
796 | ||
797 | ||
59ea14cd PE |
798 | /* Clear matrices in window tree rooted in W. If DESIRED_P, |
799 | clear desired matrices, otherwise clear current matrices. */ | |
5f5c8ee5 GM |
800 | |
801 | static void | |
59ea14cd | 802 | clear_window_matrices (struct window *w, bool desired_p) |
5f5c8ee5 GM |
803 | { |
804 | while (w) | |
805 | { | |
e74aeda8 DA |
806 | if (WINDOWP (w->contents)) |
807 | clear_window_matrices (XWINDOW (w->contents), desired_p); | |
5f5c8ee5 GM |
808 | else |
809 | { | |
810 | if (desired_p) | |
811 | clear_glyph_matrix (w->desired_matrix); | |
812 | else | |
813 | { | |
814 | clear_glyph_matrix (w->current_matrix); | |
9d93ce29 | 815 | w->window_end_valid = 0; |
5f5c8ee5 GM |
816 | } |
817 | } | |
818 | ||
d3d50620 | 819 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
820 | } |
821 | } | |
822 | ||
823 | ||
824 | \f | |
825 | /*********************************************************************** | |
826 | Glyph Rows | |
827 | ||
828 | See dispextern.h for an overall explanation of glyph rows. | |
829 | ***********************************************************************/ | |
830 | ||
ec7bc82f DA |
831 | /* Clear glyph row ROW. NOTE: this code relies on the current |
832 | layout of `glyphs' and `used' fields of `struct glyph_row'. */ | |
2cca872d | 833 | |
5f5c8ee5 | 834 | void |
971de7fb | 835 | clear_glyph_row (struct glyph_row *row) |
5f5c8ee5 | 836 | { |
cf647d93 | 837 | enum { off = offsetof (struct glyph_row, used) }; |
ec7bc82f | 838 | |
ec7bc82f | 839 | /* Zero everything except pointers in `glyphs'. */ |
9da0f50e | 840 | memset (row->used, 0, sizeof *row - off); |
5f5c8ee5 GM |
841 | } |
842 | ||
843 | ||
844 | /* Make ROW an empty, enabled row of canonical character height, | |
845 | in window W starting at y-position Y. */ | |
846 | ||
847 | void | |
971de7fb | 848 | blank_row (struct window *w, struct glyph_row *row, int y) |
5f5c8ee5 GM |
849 | { |
850 | int min_y, max_y; | |
177c0ea7 | 851 | |
7df02016 KS |
852 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
853 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 854 | |
5f5c8ee5 GM |
855 | clear_glyph_row (row); |
856 | row->y = y; | |
408f5064 | 857 | row->ascent = row->phys_ascent = 0; |
d3d50620 | 858 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 859 | row->visible_height = row->height; |
177c0ea7 | 860 | |
5f5c8ee5 | 861 | if (row->y < min_y) |
d6c747a4 GM |
862 | row->visible_height -= min_y - row->y; |
863 | if (row->y + row->height > max_y) | |
864 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
865 | |
866 | row->enabled_p = 1; | |
867 | } | |
868 | ||
869 | ||
870 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
871 | are the amounts by which to change positions. Note that the first | |
872 | glyph of the text area of a row can have a buffer position even if | |
873 | the used count of the text area is zero. Such rows display line | |
874 | ends. */ | |
875 | ||
5bf46f05 | 876 | static void |
ace1712c | 877 | increment_row_positions (struct glyph_row *row, |
d311d28c | 878 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
879 | { |
880 | int area, i; | |
881 | ||
882 | /* Increment start and end positions. */ | |
883 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
884 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
885 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
886 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
d36fe237 EZ |
887 | CHARPOS (row->start.pos) += delta; |
888 | BYTEPOS (row->start.pos) += delta_bytes; | |
889 | CHARPOS (row->end.pos) += delta; | |
890 | BYTEPOS (row->end.pos) += delta_bytes; | |
5f5c8ee5 | 891 | |
5cacdcfd KS |
892 | if (!row->enabled_p) |
893 | return; | |
894 | ||
5f5c8ee5 GM |
895 | /* Increment positions in glyphs. */ |
896 | for (area = 0; area < LAST_AREA; ++area) | |
897 | for (i = 0; i < row->used[area]; ++i) | |
898 | if (BUFFERP (row->glyphs[area][i].object) | |
899 | && row->glyphs[area][i].charpos > 0) | |
900 | row->glyphs[area][i].charpos += delta; | |
901 | ||
902 | /* Capture the case of rows displaying a line end. */ | |
903 | if (row->used[TEXT_AREA] == 0 | |
904 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
905 | row->glyphs[TEXT_AREA]->charpos += delta; | |
906 | } | |
907 | ||
908 | ||
9af3e742 | 909 | #if 0 |
5f5c8ee5 GM |
910 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
911 | contents, i.e. glyph structure contents are exchanged between A and | |
912 | B without changing glyph pointers in A and B. */ | |
913 | ||
914 | static void | |
1dae0f0a | 915 | swap_glyphs_in_rows (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
916 | { |
917 | int area; | |
918 | ||
919 | for (area = 0; area < LAST_AREA; ++area) | |
920 | { | |
921 | /* Number of glyphs to swap. */ | |
922 | int max_used = max (a->used[area], b->used[area]); | |
923 | ||
924 | /* Start of glyphs in area of row A. */ | |
925 | struct glyph *glyph_a = a->glyphs[area]; | |
926 | ||
927 | /* End + 1 of glyphs in area of row A. */ | |
928 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
929 | ||
930 | /* Start of glyphs in area of row B. */ | |
931 | struct glyph *glyph_b = b->glyphs[area]; | |
932 | ||
933 | while (glyph_a < glyph_a_end) | |
934 | { | |
935 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
936 | initialization. */ | |
937 | struct glyph temp; | |
938 | temp = *glyph_a; | |
939 | *glyph_a = *glyph_b; | |
940 | *glyph_b = temp; | |
941 | ++glyph_a; | |
942 | ++glyph_b; | |
943 | } | |
944 | } | |
945 | } | |
946 | ||
9af3e742 | 947 | #endif /* 0 */ |
5f5c8ee5 | 948 | |
015137db EZ |
949 | /* Exchange pointers to glyph memory between glyph rows A and B. Also |
950 | exchange the used[] array and the hash values of the rows, because | |
951 | these should all go together for the row's hash value to be | |
952 | correct. */ | |
5f5c8ee5 | 953 | |
b0ab8123 | 954 | static void |
971de7fb | 955 | swap_glyph_pointers (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
956 | { |
957 | int i; | |
015137db EZ |
958 | unsigned hash_tem = a->hash; |
959 | ||
5f5c8ee5 GM |
960 | for (i = 0; i < LAST_AREA + 1; ++i) |
961 | { | |
962 | struct glyph *temp = a->glyphs[i]; | |
015137db | 963 | |
5f5c8ee5 GM |
964 | a->glyphs[i] = b->glyphs[i]; |
965 | b->glyphs[i] = temp; | |
73055685 EZ |
966 | if (i < LAST_AREA) |
967 | { | |
968 | short used_tem = a->used[i]; | |
969 | ||
970 | a->used[i] = b->used[i]; | |
971 | b->used[i] = used_tem; | |
972 | } | |
5f5c8ee5 | 973 | } |
015137db EZ |
974 | a->hash = b->hash; |
975 | b->hash = hash_tem; | |
5f5c8ee5 GM |
976 | } |
977 | ||
978 | ||
ec7bc82f DA |
979 | /* Copy glyph row structure FROM to glyph row structure TO, except that |
980 | glyph pointers, the `used' counts, and the hash values in the structures | |
981 | are left unchanged. NOTE: this code relies on the current layout of | |
982 | `glyphs', `used', `hash' and `x' fields of `struct glyph_row'. */ | |
5f5c8ee5 | 983 | |
b0ab8123 | 984 | static void |
971de7fb | 985 | copy_row_except_pointers (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 | 986 | { |
cf647d93 | 987 | enum { off = offsetof (struct glyph_row, x) }; |
ec7bc82f | 988 | |
9da0f50e | 989 | memcpy (&to->x, &from->x, sizeof *to - off); |
5f5c8ee5 GM |
990 | } |
991 | ||
992 | ||
5f5c8ee5 GM |
993 | /* Assign glyph row FROM to glyph row TO. This works like a structure |
994 | assignment TO = FROM, except that glyph pointers are not copied but | |
995 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
996 | a memory leak. */ | |
997 | ||
b0ab8123 | 998 | static void |
971de7fb | 999 | assign_row (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1000 | { |
1001 | swap_glyph_pointers (to, from); | |
1002 | copy_row_except_pointers (to, from); | |
1003 | } | |
1004 | ||
1005 | ||
1006 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1007 | a row in a window matrix, is a slice of the glyph memory of the | |
1008 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
59ea14cd | 1009 | is true if the glyph memory of WINDOW_ROW is part of the glyph |
5f5c8ee5 GM |
1010 | memory of FRAME_ROW. */ |
1011 | ||
e509cfa6 | 1012 | #ifdef GLYPH_DEBUG |
9339e87f | 1013 | |
59ea14cd | 1014 | static bool |
59fc5cf9 | 1015 | glyph_row_slice_p (struct glyph_row *window_row, struct glyph_row *frame_row) |
5f5c8ee5 GM |
1016 | { |
1017 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1018 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1019 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1020 | ||
1021 | return (frame_glyph_start <= window_glyph_start | |
1022 | && window_glyph_start < frame_glyph_end); | |
1023 | } | |
1024 | ||
9339e87f | 1025 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1026 | |
9af3e742 GM |
1027 | #if 0 |
1028 | ||
5f5c8ee5 GM |
1029 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1030 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1031 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1032 | ||
1033 | static struct glyph_row * | |
59fc5cf9 AS |
1034 | find_glyph_row_slice (struct glyph_matrix *window_matrix, |
1035 | struct glyph_matrix *frame_matrix, int row) | |
5f5c8ee5 GM |
1036 | { |
1037 | int i; | |
1038 | ||
a54e2c05 | 1039 | eassert (row >= 0 && row < frame_matrix->nrows); |
5f5c8ee5 GM |
1040 | |
1041 | for (i = 0; i < window_matrix->nrows; ++i) | |
1042 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1043 | frame_matrix->rows + row)) | |
1044 | break; | |
1045 | ||
1046 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1047 | } | |
1048 | ||
9af3e742 | 1049 | #endif /* 0 */ |
5f5c8ee5 GM |
1050 | |
1051 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1052 | i.e. they are only marked as to be cleared by setting their | |
1053 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1054 | call to this function really clears it. */ | |
1055 | ||
1056 | void | |
971de7fb | 1057 | prepare_desired_row (struct glyph_row *row) |
5f5c8ee5 GM |
1058 | { |
1059 | if (!row->enabled_p) | |
1060 | { | |
59ea14cd | 1061 | bool rp = row->reversed_p; |
5009f85e | 1062 | |
5f5c8ee5 GM |
1063 | clear_glyph_row (row); |
1064 | row->enabled_p = 1; | |
5009f85e | 1065 | row->reversed_p = rp; |
5f5c8ee5 GM |
1066 | } |
1067 | } | |
1068 | ||
1069 | ||
77e3b1b7 DA |
1070 | /* Return a hash code for glyph row ROW, which may |
1071 | be from current or desired matrix of frame F. */ | |
5f5c8ee5 | 1072 | |
2f7c71a1 | 1073 | static int |
77e3b1b7 | 1074 | line_hash_code (struct frame *f, struct glyph_row *row) |
5f5c8ee5 GM |
1075 | { |
1076 | int hash = 0; | |
177c0ea7 | 1077 | |
5f5c8ee5 GM |
1078 | if (row->enabled_p) |
1079 | { | |
4cecaab8 MB |
1080 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1081 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1082 | ||
1083 | while (glyph < end) | |
1084 | { | |
1085 | int c = glyph->u.ch; | |
1086 | int face_id = glyph->face_id; | |
77e3b1b7 | 1087 | if (FRAME_MUST_WRITE_SPACES (f)) |
4cecaab8 MB |
1088 | c -= SPACEGLYPH; |
1089 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1090 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1091 | ++glyph; | |
1092 | } | |
5f5c8ee5 | 1093 | |
4cecaab8 MB |
1094 | if (hash == 0) |
1095 | hash = 1; | |
5f5c8ee5 GM |
1096 | } |
1097 | ||
1098 | return hash; | |
1099 | } | |
1100 | ||
1101 | ||
77e3b1b7 DA |
1102 | /* Return the cost of drawing line VPOS in MATRIX, which may |
1103 | be current or desired matrix of frame F. The cost equals | |
1104 | the number of characters in the line. If must_write_spaces | |
1105 | is zero, leading and trailing spaces are ignored. */ | |
5f5c8ee5 | 1106 | |
dfd153ae | 1107 | static int |
77e3b1b7 | 1108 | line_draw_cost (struct frame *f, struct glyph_matrix *matrix, int vpos) |
5f5c8ee5 GM |
1109 | { |
1110 | struct glyph_row *row = matrix->rows + vpos; | |
1111 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1112 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1113 | int len; | |
1114 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
ca9ce8f2 | 1115 | ptrdiff_t glyph_table_len = GLYPH_TABLE_LENGTH; |
5f5c8ee5 GM |
1116 | |
1117 | /* Ignore trailing and leading spaces if we can. */ | |
77e3b1b7 | 1118 | if (!FRAME_MUST_WRITE_SPACES (f)) |
5f5c8ee5 GM |
1119 | { |
1120 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1121 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1122 | --end; |
1123 | ||
177c0ea7 | 1124 | /* All blank line. */ |
5f5c8ee5 GM |
1125 | if (end == beg) |
1126 | return 0; | |
1127 | ||
1128 | /* Skip over leading spaces. */ | |
1129 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1130 | ++beg; | |
1131 | } | |
1132 | ||
1133 | /* If we don't have a glyph-table, each glyph is one character, | |
1134 | so return the number of glyphs. */ | |
1135 | if (glyph_table_base == 0) | |
1136 | len = end - beg; | |
1137 | else | |
1138 | { | |
1139 | /* Otherwise, scan the glyphs and accumulate their total length | |
1140 | in LEN. */ | |
1141 | len = 0; | |
1142 | while (beg < end) | |
1143 | { | |
3fc809e2 | 1144 | GLYPH g; |
177c0ea7 | 1145 | |
3fc809e2 KS |
1146 | SET_GLYPH_FROM_CHAR_GLYPH (g, *beg); |
1147 | ||
565b39a8 | 1148 | if (GLYPH_INVALID_P (g) |
42186983 | 1149 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) |
5f5c8ee5 GM |
1150 | len += 1; |
1151 | else | |
1152 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1153 | |
5f5c8ee5 GM |
1154 | ++beg; |
1155 | } | |
1156 | } | |
177c0ea7 | 1157 | |
5f5c8ee5 GM |
1158 | return len; |
1159 | } | |
1160 | ||
1161 | ||
59ea14cd PE |
1162 | /* Return true if the glyph rows A and B have equal contents. |
1163 | MOUSE_FACE_P means compare the mouse_face_p flags of A and B, too. */ | |
5f5c8ee5 | 1164 | |
b0ab8123 | 1165 | static bool |
59ea14cd | 1166 | row_equal_p (struct glyph_row *a, struct glyph_row *b, bool mouse_face_p) |
5f5c8ee5 | 1167 | { |
a54e2c05 DA |
1168 | eassert (verify_row_hash (a)); |
1169 | eassert (verify_row_hash (b)); | |
7a7270dd | 1170 | |
5f5c8ee5 GM |
1171 | if (a == b) |
1172 | return 1; | |
1173 | else if (a->hash != b->hash) | |
1174 | return 0; | |
1175 | else | |
1176 | { | |
1177 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1178 | int area; | |
1179 | ||
e4e0bee9 GM |
1180 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1181 | return 0; | |
1182 | ||
5f5c8ee5 GM |
1183 | /* Compare glyphs. */ |
1184 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1185 | { | |
1186 | if (a->used[area] != b->used[area]) | |
1187 | return 0; | |
177c0ea7 | 1188 | |
5f5c8ee5 GM |
1189 | a_glyph = a->glyphs[area]; |
1190 | a_end = a_glyph + a->used[area]; | |
1191 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1192 | |
5f5c8ee5 GM |
1193 | while (a_glyph < a_end |
1194 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1195 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1196 | |
5f5c8ee5 GM |
1197 | if (a_glyph != a_end) |
1198 | return 0; | |
1199 | } | |
1200 | ||
6b61353c KH |
1201 | if (a->fill_line_p != b->fill_line_p |
1202 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1203 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
1204 | || a->left_fringe_face_id != b->left_fringe_face_id | |
e61124cd | 1205 | || a->left_fringe_offset != b->left_fringe_offset |
6b61353c KH |
1206 | || a->right_fringe_bitmap != b->right_fringe_bitmap |
1207 | || a->right_fringe_face_id != b->right_fringe_face_id | |
e61124cd YM |
1208 | || a->right_fringe_offset != b->right_fringe_offset |
1209 | || a->fringe_bitmap_periodic_p != b->fringe_bitmap_periodic_p | |
3d4a365f | 1210 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
6b61353c | 1211 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1212 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1213 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1214 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
918f4159 | 1215 | || a->reversed_p != b->reversed_p |
5f5c8ee5 GM |
1216 | /* Different partially visible characters on left margin. */ |
1217 | || a->x != b->x | |
1218 | /* Different height. */ | |
1219 | || a->ascent != b->ascent | |
408f5064 GM |
1220 | || a->phys_ascent != b->phys_ascent |
1221 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1222 | || a->visible_height != b->visible_height) |
1223 | return 0; | |
1224 | } | |
1225 | ||
1226 | return 1; | |
1227 | } | |
1228 | ||
1229 | ||
1230 | \f | |
1231 | /*********************************************************************** | |
1232 | Glyph Pool | |
1233 | ||
1234 | See dispextern.h for an overall explanation of glyph pools. | |
1235 | ***********************************************************************/ | |
1236 | ||
f0b79313 DA |
1237 | /* Allocate a glyph_pool structure. The structure returned is initialized |
1238 | with zeros. If GLYPH_DEBUG and ENABLE_CHECKING are in effect, the global | |
1239 | variable glyph_pool_count is incremented for each pool allocated. */ | |
5f5c8ee5 GM |
1240 | |
1241 | static struct glyph_pool * | |
971de7fb | 1242 | new_glyph_pool (void) |
5f5c8ee5 | 1243 | { |
23f86fce | 1244 | struct glyph_pool *result = xzalloc (sizeof *result); |
177c0ea7 | 1245 | |
f0b79313 | 1246 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
5f5c8ee5 GM |
1247 | /* For memory leak and double deletion checking. */ |
1248 | ++glyph_pool_count; | |
f0b79313 | 1249 | #endif |
177c0ea7 | 1250 | |
5f5c8ee5 GM |
1251 | return result; |
1252 | } | |
1253 | ||
1254 | ||
1255 | /* Free a glyph_pool structure POOL. The function may be called with | |
f0b79313 DA |
1256 | a null POOL pointer. If GLYPH_DEBUG and ENABLE_CHECKING are in effect, |
1257 | global variable glyph_pool_count is decremented with every pool structure | |
1258 | freed. If this count gets negative, more structures were freed than | |
1259 | allocated, i.e. one structure must have been freed more than once or | |
1260 | a bogus pointer was passed to free_glyph_pool. */ | |
5f5c8ee5 GM |
1261 | |
1262 | static void | |
971de7fb | 1263 | free_glyph_pool (struct glyph_pool *pool) |
5f5c8ee5 GM |
1264 | { |
1265 | if (pool) | |
1266 | { | |
f0b79313 | 1267 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
153a073c | 1268 | /* More freed than allocated? */ |
5f5c8ee5 | 1269 | --glyph_pool_count; |
a54e2c05 | 1270 | eassert (glyph_pool_count >= 0); |
f0b79313 | 1271 | #endif |
5f5c8ee5 GM |
1272 | xfree (pool->glyphs); |
1273 | xfree (pool); | |
1274 | } | |
1275 | } | |
1276 | ||
1277 | ||
1278 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1279 | columns we need. This function never shrinks a pool. The only | |
1280 | case in which this would make sense, would be when a frame's size | |
1281 | is changed from a large value to a smaller one. But, if someone | |
1282 | does it once, we can expect that he will do it again. | |
1283 | ||
59ea14cd | 1284 | Return true if the pool changed in a way which makes |
5f5c8ee5 GM |
1285 | re-adjusting window glyph matrices necessary. */ |
1286 | ||
59ea14cd | 1287 | static bool |
971de7fb | 1288 | realloc_glyph_pool (struct glyph_pool *pool, struct dim matrix_dim) |
5f5c8ee5 | 1289 | { |
ca9ce8f2 | 1290 | ptrdiff_t needed; |
59ea14cd | 1291 | bool changed_p; |
5f5c8ee5 GM |
1292 | |
1293 | changed_p = (pool->glyphs == 0 | |
1294 | || matrix_dim.height != pool->nrows | |
1295 | || matrix_dim.width != pool->ncolumns); | |
1296 | ||
1297 | /* Enlarge the glyph pool. */ | |
ca9ce8f2 | 1298 | needed = matrix_dim.width; |
0065d054 PE |
1299 | if (INT_MULTIPLY_OVERFLOW (needed, matrix_dim.height)) |
1300 | memory_full (SIZE_MAX); | |
ca9ce8f2 | 1301 | needed *= matrix_dim.height; |
5f5c8ee5 GM |
1302 | if (needed > pool->nglyphs) |
1303 | { | |
0065d054 PE |
1304 | ptrdiff_t old_nglyphs = pool->nglyphs; |
1305 | pool->glyphs = xpalloc (pool->glyphs, &pool->nglyphs, | |
1306 | needed - old_nglyphs, -1, sizeof *pool->glyphs); | |
1307 | memset (pool->glyphs + old_nglyphs, 0, | |
1308 | (pool->nglyphs - old_nglyphs) * sizeof *pool->glyphs); | |
5f5c8ee5 GM |
1309 | } |
1310 | ||
153a073c | 1311 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1312 | to do sanity checks, and (b) the number of columns determines |
1313 | where rows in the frame matrix start---this must be available to | |
1314 | determine pointers to rows of window sub-matrices. */ | |
1315 | pool->nrows = matrix_dim.height; | |
1316 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1317 | |
5f5c8ee5 GM |
1318 | return changed_p; |
1319 | } | |
1320 | ||
1321 | ||
1322 | \f | |
1323 | /*********************************************************************** | |
1324 | Debug Code | |
1325 | ***********************************************************************/ | |
1326 | ||
e509cfa6 | 1327 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 1328 | |
a13396c9 | 1329 | |
28d440ab KL |
1330 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1331 | XXX Maybe this should be changed to flush the current terminal instead of | |
1332 | stdout. | |
1333 | */ | |
a13396c9 | 1334 | |
85fece3e PE |
1335 | void flush_stdout (void) EXTERNALLY_VISIBLE; |
1336 | ||
a13396c9 | 1337 | void |
59fc5cf9 | 1338 | flush_stdout (void) |
a13396c9 GM |
1339 | { |
1340 | fflush (stdout); | |
1341 | } | |
1342 | ||
1343 | ||
5f5c8ee5 GM |
1344 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1345 | pointer has been lost, e.g. by using a structure assignment between | |
1346 | rows, at least one pointer must occur more than once in the rows of | |
1347 | MATRIX. */ | |
1348 | ||
1349 | void | |
59fc5cf9 | 1350 | check_matrix_pointer_lossage (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
1351 | { |
1352 | int i, j; | |
177c0ea7 | 1353 | |
5f5c8ee5 GM |
1354 | for (i = 0; i < matrix->nrows; ++i) |
1355 | for (j = 0; j < matrix->nrows; ++j) | |
a54e2c05 | 1356 | eassert (i == j |
5f5c8ee5 GM |
1357 | || (matrix->rows[i].glyphs[TEXT_AREA] |
1358 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1359 | } | |
1360 | ||
1361 | ||
1362 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1363 | ||
1364 | struct glyph_row * | |
59fc5cf9 | 1365 | matrix_row (struct glyph_matrix *matrix, int row) |
5f5c8ee5 | 1366 | { |
a54e2c05 DA |
1367 | eassert (matrix && matrix->rows); |
1368 | eassert (row >= 0 && row < matrix->nrows); | |
5f5c8ee5 GM |
1369 | |
1370 | /* That's really too slow for normal testing because this function | |
1371 | is called almost everywhere. Although---it's still astonishingly | |
1372 | fast, so it is valuable to have for debugging purposes. */ | |
1373 | #if 0 | |
1374 | check_matrix_pointer_lossage (matrix); | |
1375 | #endif | |
177c0ea7 | 1376 | |
5f5c8ee5 GM |
1377 | return matrix->rows + row; |
1378 | } | |
1379 | ||
1380 | ||
1381 | #if 0 /* This function makes invalid assumptions when text is | |
1382 | partially invisible. But it might come handy for debugging | |
1383 | nevertheless. */ | |
1384 | ||
1385 | /* Check invariants that must hold for an up to date current matrix of | |
1386 | window W. */ | |
1387 | ||
1388 | static void | |
59fc5cf9 | 1389 | check_matrix_invariants (struct window *w) |
5f5c8ee5 GM |
1390 | { |
1391 | struct glyph_matrix *matrix = w->current_matrix; | |
1392 | int yb = window_text_bottom_y (w); | |
1393 | struct glyph_row *row = matrix->rows; | |
1394 | struct glyph_row *last_text_row = NULL; | |
1395 | struct buffer *saved = current_buffer; | |
e74aeda8 | 1396 | struct buffer *buffer = XBUFFER (w->contents); |
5f5c8ee5 | 1397 | int c; |
177c0ea7 | 1398 | |
5f5c8ee5 GM |
1399 | /* This can sometimes happen for a fresh window. */ |
1400 | if (matrix->nrows < 2) | |
1401 | return; | |
1402 | ||
1403 | set_buffer_temp (buffer); | |
1404 | ||
1405 | /* Note: last row is always reserved for the mode line. */ | |
1406 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1407 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1408 | { | |
1409 | struct glyph_row *next = row + 1; | |
1410 | ||
1411 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1412 | last_text_row = row; | |
1413 | ||
1414 | /* Check that character and byte positions are in sync. */ | |
a54e2c05 | 1415 | eassert (MATRIX_ROW_START_BYTEPOS (row) |
5f5c8ee5 | 1416 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); |
a54e2c05 | 1417 | eassert (BYTEPOS (row->start.pos) |
d36fe237 | 1418 | == CHAR_TO_BYTE (CHARPOS (row->start.pos))); |
5f5c8ee5 GM |
1419 | |
1420 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1421 | have such a position temporarily in case of a minibuffer | |
1422 | displaying something like `[Sole completion]' at its end. */ | |
1423 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
d36fe237 | 1424 | { |
a54e2c05 | 1425 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
d36fe237 | 1426 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); |
a54e2c05 | 1427 | eassert (BYTEPOS (row->end.pos) |
d36fe237 EZ |
1428 | == CHAR_TO_BYTE (CHARPOS (row->end.pos))); |
1429 | } | |
5f5c8ee5 GM |
1430 | |
1431 | /* Check that end position of `row' is equal to start position | |
1432 | of next row. */ | |
1433 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1434 | { | |
a54e2c05 | 1435 | eassert (MATRIX_ROW_END_CHARPOS (row) |
5f5c8ee5 | 1436 | == MATRIX_ROW_START_CHARPOS (next)); |
a54e2c05 | 1437 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
5f5c8ee5 | 1438 | == MATRIX_ROW_START_BYTEPOS (next)); |
a54e2c05 DA |
1439 | eassert (CHARPOS (row->end.pos) == CHARPOS (next->start.pos)); |
1440 | eassert (BYTEPOS (row->end.pos) == BYTEPOS (next->start.pos)); | |
5f5c8ee5 GM |
1441 | } |
1442 | row = next; | |
1443 | } | |
1444 | ||
a54e2c05 DA |
1445 | eassert (w->current_matrix->nrows == w->desired_matrix->nrows); |
1446 | eassert (w->desired_matrix->rows != NULL); | |
5f5c8ee5 GM |
1447 | set_buffer_temp (saved); |
1448 | } | |
1449 | ||
1450 | #endif /* 0 */ | |
1451 | ||
e509cfa6 | 1452 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
1453 | |
1454 | ||
1455 | \f | |
1456 | /********************************************************************** | |
1457 | Allocating/ Adjusting Glyph Matrices | |
1458 | **********************************************************************/ | |
1459 | ||
1460 | /* Allocate glyph matrices over a window tree for a frame-based | |
1461 | redisplay | |
1462 | ||
1463 | X and Y are column/row within the frame glyph matrix where | |
1464 | sub-matrices for the window tree rooted at WINDOW must be | |
59ea14cd | 1465 | allocated. DIM_ONLY_P means that the caller of this |
8ce2650d YM |
1466 | function is only interested in the result matrix dimension, and |
1467 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1468 | |
1469 | The function returns the total width/height of the sub-matrices of | |
1470 | the window tree. If called on a frame root window, the computation | |
1471 | will take the mini-buffer window into account. | |
1472 | ||
1473 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1474 | ||
1475 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1476 | glyph matrices yet, and | |
1477 | ||
1478 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1479 | any window in the tree will be changed or have been changed (see | |
153a073c | 1480 | DIM_ONLY_P) |
5f5c8ee5 GM |
1481 | |
1482 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1483 | function. | |
1484 | ||
1485 | Windows are arranged into chains of windows on the same level | |
1486 | through the next fields of window structures. Such a level can be | |
1487 | either a sequence of horizontally adjacent windows from left to | |
1488 | right, or a sequence of vertically adjacent windows from top to | |
1489 | bottom. Each window in a horizontal sequence can be either a leaf | |
1490 | window or a vertical sequence; a window in a vertical sequence can | |
1491 | be either a leaf or a horizontal sequence. All windows in a | |
1492 | horizontal sequence have the same height, and all windows in a | |
1493 | vertical sequence have the same width. | |
1494 | ||
1495 | This function uses, for historical reasons, a more general | |
1496 | algorithm to determine glyph matrix dimensions that would be | |
1497 | necessary. | |
1498 | ||
1499 | The matrix height of a horizontal sequence is determined by the | |
1500 | maximum height of any matrix in the sequence. The matrix width of | |
1501 | a horizontal sequence is computed by adding up matrix widths of | |
1502 | windows in the sequence. | |
1503 | ||
1504 | |<------- result width ------->| | |
1505 | +---------+----------+---------+ --- | |
1506 | | | | | | | |
1507 | | | | | | |
1508 | +---------+ | | result height | |
1509 | | +---------+ | |
1510 | | | | | |
1511 | +----------+ --- | |
1512 | ||
1513 | The matrix width of a vertical sequence is the maximum matrix width | |
1514 | of any window in the sequence. Its height is computed by adding up | |
1515 | matrix heights of windows in the sequence. | |
1516 | ||
1517 | |<---- result width -->| | |
1518 | +---------+ --- | |
1519 | | | | | |
1520 | | | | | |
1521 | +---------+--+ | | |
1522 | | | | | |
1523 | | | result height | |
1524 | | | | |
1525 | +------------+---------+ | | |
1526 | | | | | |
1527 | | | | | |
1528 | +------------+---------+ --- */ | |
1529 | ||
1530 | /* Bit indicating that a new matrix will be allocated or has been | |
1531 | allocated. */ | |
1532 | ||
1533 | #define NEW_LEAF_MATRIX (1 << 0) | |
1534 | ||
1535 | /* Bit indicating that a matrix will or has changed its location or | |
1536 | size. */ | |
1537 | ||
1538 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1539 | ||
1540 | static struct dim | |
6f704c76 | 1541 | allocate_matrices_for_frame_redisplay (Lisp_Object window, int x, int y, |
59ea14cd | 1542 | bool dim_only_p, int *window_change_flags) |
5f5c8ee5 GM |
1543 | { |
1544 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1545 | int x0 = x, y0 = y; | |
1546 | int wmax = 0, hmax = 0; | |
1547 | struct dim total; | |
1548 | struct dim dim; | |
1549 | struct window *w; | |
59ea14cd | 1550 | bool in_horz_combination_p; |
5f5c8ee5 GM |
1551 | |
1552 | /* What combination is WINDOW part of? Compute this once since the | |
1553 | result is the same for all windows in the `next' chain. The | |
1554 | special case of a root window (parent equal to nil) is treated | |
1555 | like a vertical combination because a root window's `next' | |
1556 | points to the mini-buffer window, if any, which is arranged | |
1557 | vertically below other windows. */ | |
1558 | in_horz_combination_p | |
d3d50620 | 1559 | = (!NILP (XWINDOW (window)->parent) |
e74aeda8 | 1560 | && WINDOW_HORIZONTAL_COMBINATION_P (XWINDOW (XWINDOW (window)->parent))); |
5f5c8ee5 GM |
1561 | |
1562 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1563 | do |
5f5c8ee5 GM |
1564 | { |
1565 | w = XWINDOW (window); | |
1566 | ||
1567 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1568 | on whether this is a combination or a leaf window. */ |
e74aeda8 DA |
1569 | if (WINDOWP (w->contents)) |
1570 | dim = allocate_matrices_for_frame_redisplay (w->contents, x, y, | |
5f5c8ee5 GM |
1571 | dim_only_p, |
1572 | window_change_flags); | |
1573 | else | |
1574 | { | |
1575 | /* If not already done, allocate sub-matrix structures. */ | |
1576 | if (w->desired_matrix == NULL) | |
1577 | { | |
1578 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1579 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1580 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1581 | } | |
177c0ea7 | 1582 | |
5f5c8ee5 GM |
1583 | /* Width and height MUST be chosen so that there are no |
1584 | holes in the frame matrix. */ | |
5d3cc43c GM |
1585 | dim.width = required_matrix_width (w); |
1586 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1587 | |
1588 | /* Will matrix be re-allocated? */ | |
1589 | if (x != w->desired_matrix->matrix_x | |
1590 | || y != w->desired_matrix->matrix_y | |
1591 | || dim.width != w->desired_matrix->matrix_w | |
1592 | || dim.height != w->desired_matrix->matrix_h | |
1593 | || (margin_glyphs_to_reserve (w, dim.width, | |
d3d50620 | 1594 | w->left_margin_cols) |
5f5c8ee5 GM |
1595 | != w->desired_matrix->left_margin_glyphs) |
1596 | || (margin_glyphs_to_reserve (w, dim.width, | |
d3d50620 | 1597 | w->right_margin_cols) |
5f5c8ee5 GM |
1598 | != w->desired_matrix->right_margin_glyphs)) |
1599 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1600 | ||
1601 | /* Actually change matrices, if allowed. Do not consider | |
1602 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1603 | may have been changed which we don't now here. We trust | |
59ea14cd | 1604 | that we only will be called with DIM_ONLY_P when |
5f5c8ee5 GM |
1605 | necessary. */ |
1606 | if (!dim_only_p) | |
1607 | { | |
1608 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1609 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1610 | } | |
1611 | } | |
1612 | ||
1613 | /* If we are part of a horizontal combination, advance x for | |
1614 | windows to the right of W; otherwise advance y for windows | |
1615 | below W. */ | |
1616 | if (in_horz_combination_p) | |
1617 | x += dim.width; | |
177c0ea7 | 1618 | else |
5f5c8ee5 GM |
1619 | y += dim.height; |
1620 | ||
1621 | /* Remember maximum glyph matrix dimensions. */ | |
1622 | wmax = max (wmax, dim.width); | |
1623 | hmax = max (hmax, dim.height); | |
1624 | ||
1625 | /* Next window on same level. */ | |
d3d50620 | 1626 | window = w->next; |
5f5c8ee5 GM |
1627 | } |
1628 | while (!NILP (window)); | |
1629 | ||
1630 | /* Set `total' to the total glyph matrix dimension of this window | |
1631 | level. In a vertical combination, the width is the width of the | |
1632 | widest window; the height is the y we finally reached, corrected | |
1633 | by the y we started with. In a horizontal combination, the total | |
1634 | height is the height of the tallest window, and the width is the | |
1635 | x we finally reached, corrected by the x we started with. */ | |
1636 | if (in_horz_combination_p) | |
1637 | { | |
1638 | total.width = x - x0; | |
1639 | total.height = hmax; | |
1640 | } | |
177c0ea7 | 1641 | else |
5f5c8ee5 GM |
1642 | { |
1643 | total.width = wmax; | |
1644 | total.height = y - y0; | |
1645 | } | |
1646 | ||
1647 | return total; | |
1648 | } | |
1649 | ||
1650 | ||
5d3cc43c GM |
1651 | /* Return the required height of glyph matrices for window W. */ |
1652 | ||
2f7c71a1 | 1653 | static int |
971de7fb | 1654 | required_matrix_height (struct window *w) |
5d3cc43c GM |
1655 | { |
1656 | #ifdef HAVE_WINDOW_SYSTEM | |
d3d50620 | 1657 | struct frame *f = XFRAME (w->frame); |
177c0ea7 | 1658 | |
5d3cc43c GM |
1659 | if (FRAME_WINDOW_P (f)) |
1660 | { | |
1661 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1ea40aa2 | 1662 | int window_pixel_height = window_box_height (w) + eabs (w->vscroll); |
5d3cc43c | 1663 | return (((window_pixel_height + ch_height - 1) |
cc834cf9 | 1664 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
1665 | /* One partially visible line at the top and |
1666 | bottom of the window. */ | |
1667 | + 2 | |
153a073c | 1668 | /* 2 for header and mode line. */ |
5d3cc43c GM |
1669 | + 2); |
1670 | } | |
1671 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 1672 | |
7df02016 | 1673 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
1674 | } |
1675 | ||
1676 | ||
1677 | /* Return the required width of glyph matrices for window W. */ | |
1678 | ||
2f7c71a1 | 1679 | static int |
971de7fb | 1680 | required_matrix_width (struct window *w) |
5d3cc43c GM |
1681 | { |
1682 | #ifdef HAVE_WINDOW_SYSTEM | |
d3d50620 | 1683 | struct frame *f = XFRAME (w->frame); |
5d3cc43c GM |
1684 | if (FRAME_WINDOW_P (f)) |
1685 | { | |
1686 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 1687 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 1688 | |
5d3cc43c GM |
1689 | /* Compute number of glyphs needed in a glyph row. */ |
1690 | return (((window_pixel_width + ch_width - 1) | |
cc834cf9 | 1691 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
1692 | /* 2 partially visible columns in the text area. */ |
1693 | + 2 | |
1694 | /* One partially visible column at the right | |
1695 | edge of each marginal area. */ | |
1696 | + 1 + 1); | |
1697 | } | |
1698 | #endif /* HAVE_WINDOW_SYSTEM */ | |
1699 | ||
5f24fa51 | 1700 | return w->total_cols; |
5d3cc43c GM |
1701 | } |
1702 | ||
1703 | ||
5f5c8ee5 | 1704 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 1705 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 1706 | |
5f5c8ee5 | 1707 | static void |
971de7fb | 1708 | allocate_matrices_for_window_redisplay (struct window *w) |
5f5c8ee5 | 1709 | { |
5f5c8ee5 GM |
1710 | while (w) |
1711 | { | |
e74aeda8 DA |
1712 | if (WINDOWP (w->contents)) |
1713 | allocate_matrices_for_window_redisplay (XWINDOW (w->contents)); | |
5f5c8ee5 GM |
1714 | else |
1715 | { | |
1716 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
1717 | struct dim dim; |
1718 | ||
1719 | /* If matrices are not yet allocated, allocate them now. */ | |
1720 | if (w->desired_matrix == NULL) | |
1721 | { | |
1722 | w->desired_matrix = new_glyph_matrix (NULL); | |
1723 | w->current_matrix = new_glyph_matrix (NULL); | |
1724 | } | |
1725 | ||
5d3cc43c GM |
1726 | dim.width = required_matrix_width (w); |
1727 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1728 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
1729 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
1730 | } | |
177c0ea7 | 1731 | |
d3d50620 | 1732 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
5f5c8ee5 GM |
1733 | } |
1734 | } | |
1735 | ||
bd0443bb DA |
1736 | /* Allocate/reallocate glyph matrices of a single frame F. |
1737 | This function must be called when a new frame is created, | |
1738 | its size changes, or its window configuration changes. */ | |
5f5c8ee5 GM |
1739 | |
1740 | void | |
bd0443bb | 1741 | adjust_frame_glyphs (struct frame *f) |
5f5c8ee5 | 1742 | { |
408f5064 GM |
1743 | /* Block input so that expose events and other events that access |
1744 | glyph matrices are not processed while we are changing them. */ | |
4d7e6e51 | 1745 | block_input (); |
408f5064 | 1746 | |
5f5c8ee5 GM |
1747 | if (FRAME_WINDOW_P (f)) |
1748 | adjust_frame_glyphs_for_window_redisplay (f); | |
1749 | else | |
1750 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 1751 | |
b09cca6a | 1752 | /* Don't forget the buffer for decode_mode_spec. */ |
5f5c8ee5 GM |
1753 | adjust_decode_mode_spec_buffer (f); |
1754 | ||
1755 | f->glyphs_initialized_p = 1; | |
bd0443bb DA |
1756 | |
1757 | unblock_input (); | |
5f5c8ee5 GM |
1758 | } |
1759 | ||
59ea14cd | 1760 | /* Return true if any window in the tree has nonzero window margins. See |
075757cc | 1761 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ |
59ea14cd | 1762 | static bool |
971de7fb | 1763 | showing_window_margins_p (struct window *w) |
075757cc CY |
1764 | { |
1765 | while (w) | |
1766 | { | |
e74aeda8 | 1767 | if (WINDOWP (w->contents)) |
075757cc | 1768 | { |
e74aeda8 | 1769 | if (showing_window_margins_p (XWINDOW (w->contents))) |
075757cc CY |
1770 | return 1; |
1771 | } | |
eeaf9bf3 | 1772 | else if (w->left_margin_cols > 0 || w->right_margin_cols > 0) |
075757cc | 1773 | return 1; |
3fc809e2 | 1774 | |
d3d50620 | 1775 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
075757cc CY |
1776 | } |
1777 | return 0; | |
1778 | } | |
1779 | ||
5f5c8ee5 | 1780 | |
c9f00270 GM |
1781 | /* In the window tree with root W, build current matrices of leaf |
1782 | windows from the frame's current matrix. */ | |
1783 | ||
1784 | static void | |
971de7fb | 1785 | fake_current_matrices (Lisp_Object window) |
c9f00270 GM |
1786 | { |
1787 | struct window *w; | |
177c0ea7 | 1788 | |
d3d50620 | 1789 | for (; !NILP (window); window = w->next) |
c9f00270 GM |
1790 | { |
1791 | w = XWINDOW (window); | |
177c0ea7 | 1792 | |
e74aeda8 DA |
1793 | if (WINDOWP (w->contents)) |
1794 | fake_current_matrices (w->contents); | |
c9f00270 GM |
1795 | else |
1796 | { | |
1797 | int i; | |
d3d50620 | 1798 | struct frame *f = XFRAME (w->frame); |
c9f00270 GM |
1799 | struct glyph_matrix *m = w->current_matrix; |
1800 | struct glyph_matrix *fm = f->current_matrix; | |
1801 | ||
a54e2c05 DA |
1802 | eassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
1803 | eassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 1804 | |
c9f00270 GM |
1805 | for (i = 0; i < m->matrix_h; ++i) |
1806 | { | |
1807 | struct glyph_row *r = m->rows + i; | |
7df02016 | 1808 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 | 1809 | |
a54e2c05 | 1810 | eassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] |
c9f00270 GM |
1811 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); |
1812 | ||
1813 | r->enabled_p = fr->enabled_p; | |
1814 | if (r->enabled_p) | |
1815 | { | |
1816 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
1817 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
1818 | r->used[TEXT_AREA] = (m->matrix_w | |
1819 | - r->used[LEFT_MARGIN_AREA] | |
1820 | - r->used[RIGHT_MARGIN_AREA]); | |
1821 | r->mode_line_p = 0; | |
c9f00270 GM |
1822 | } |
1823 | } | |
1824 | } | |
1825 | } | |
1826 | } | |
1827 | ||
1828 | ||
bccee4f2 | 1829 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 1830 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 1831 | |
bccee4f2 | 1832 | static struct glyph_matrix * |
971de7fb | 1833 | save_current_matrix (struct frame *f) |
c9f00270 | 1834 | { |
bccee4f2 | 1835 | int i; |
38182d90 | 1836 | struct glyph_matrix *saved = xzalloc (sizeof *saved); |
bccee4f2 | 1837 | saved->nrows = f->current_matrix->nrows; |
23f86fce | 1838 | saved->rows = xzalloc (saved->nrows * sizeof *saved->rows); |
bccee4f2 GM |
1839 | |
1840 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 1841 | { |
bccee4f2 GM |
1842 | struct glyph_row *from = f->current_matrix->rows + i; |
1843 | struct glyph_row *to = saved->rows + i; | |
dfd153ae | 1844 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
141f1ff7 | 1845 | |
23f86fce | 1846 | to->glyphs[TEXT_AREA] = xmalloc (nbytes); |
72af86bd | 1847 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
bccee4f2 | 1848 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
fa93733d EZ |
1849 | to->enabled_p = from->enabled_p; |
1850 | to->hash = from->hash; | |
141f1ff7 EZ |
1851 | if (from->used[LEFT_MARGIN_AREA]) |
1852 | { | |
1853 | nbytes = from->used[LEFT_MARGIN_AREA] * sizeof (struct glyph); | |
3b158d11 | 1854 | to->glyphs[LEFT_MARGIN_AREA] = xmalloc (nbytes); |
141f1ff7 EZ |
1855 | memcpy (to->glyphs[LEFT_MARGIN_AREA], |
1856 | from->glyphs[LEFT_MARGIN_AREA], nbytes); | |
1857 | to->used[LEFT_MARGIN_AREA] = from->used[LEFT_MARGIN_AREA]; | |
1858 | } | |
1859 | if (from->used[RIGHT_MARGIN_AREA]) | |
1860 | { | |
1861 | nbytes = from->used[RIGHT_MARGIN_AREA] * sizeof (struct glyph); | |
3b158d11 | 1862 | to->glyphs[RIGHT_MARGIN_AREA] = xmalloc (nbytes); |
141f1ff7 EZ |
1863 | memcpy (to->glyphs[RIGHT_MARGIN_AREA], |
1864 | from->glyphs[RIGHT_MARGIN_AREA], nbytes); | |
1865 | to->used[RIGHT_MARGIN_AREA] = from->used[RIGHT_MARGIN_AREA]; | |
1866 | } | |
e797dea6 | 1867 | } |
bccee4f2 GM |
1868 | |
1869 | return saved; | |
1870 | } | |
1871 | ||
1872 | ||
1873 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
1874 | and free memory associated with SAVED. */ | |
1875 | ||
1876 | static void | |
971de7fb | 1877 | restore_current_matrix (struct frame *f, struct glyph_matrix *saved) |
bccee4f2 GM |
1878 | { |
1879 | int i; | |
1880 | ||
1881 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 1882 | { |
bccee4f2 GM |
1883 | struct glyph_row *from = saved->rows + i; |
1884 | struct glyph_row *to = f->current_matrix->rows + i; | |
dfd153ae | 1885 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
141f1ff7 | 1886 | |
72af86bd | 1887 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
e797dea6 | 1888 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
bccee4f2 | 1889 | xfree (from->glyphs[TEXT_AREA]); |
2fa833da | 1890 | nbytes = from->used[LEFT_MARGIN_AREA] * sizeof (struct glyph); |
141f1ff7 EZ |
1891 | if (nbytes) |
1892 | { | |
1893 | memcpy (to->glyphs[LEFT_MARGIN_AREA], | |
1894 | from->glyphs[LEFT_MARGIN_AREA], nbytes); | |
1895 | to->used[LEFT_MARGIN_AREA] = from->used[LEFT_MARGIN_AREA]; | |
1896 | xfree (from->glyphs[LEFT_MARGIN_AREA]); | |
1897 | } | |
1898 | else | |
1899 | to->used[LEFT_MARGIN_AREA] = 0; | |
2fa833da | 1900 | nbytes = from->used[RIGHT_MARGIN_AREA] * sizeof (struct glyph); |
141f1ff7 EZ |
1901 | if (nbytes) |
1902 | { | |
1903 | memcpy (to->glyphs[RIGHT_MARGIN_AREA], | |
1904 | from->glyphs[RIGHT_MARGIN_AREA], nbytes); | |
1905 | to->used[RIGHT_MARGIN_AREA] = from->used[RIGHT_MARGIN_AREA]; | |
1906 | xfree (from->glyphs[RIGHT_MARGIN_AREA]); | |
1907 | } | |
1908 | else | |
1909 | to->used[RIGHT_MARGIN_AREA] = 0; | |
e797dea6 | 1910 | } |
177c0ea7 | 1911 | |
bccee4f2 GM |
1912 | xfree (saved->rows); |
1913 | xfree (saved); | |
c9f00270 GM |
1914 | } |
1915 | ||
1916 | ||
bccee4f2 | 1917 | |
5f5c8ee5 GM |
1918 | /* Allocate/reallocate glyph matrices of a single frame F for |
1919 | frame-based redisplay. */ | |
1920 | ||
1921 | static void | |
971de7fb | 1922 | adjust_frame_glyphs_for_frame_redisplay (struct frame *f) |
5f5c8ee5 | 1923 | { |
5f5c8ee5 | 1924 | struct dim matrix_dim; |
59ea14cd | 1925 | bool pool_changed_p; |
5f5c8ee5 GM |
1926 | int window_change_flags; |
1927 | int top_window_y; | |
1928 | ||
1929 | if (!FRAME_LIVE_P (f)) | |
1930 | return; | |
1931 | ||
5f5c8ee5 GM |
1932 | top_window_y = FRAME_TOP_MARGIN (f); |
1933 | ||
1934 | /* Allocate glyph pool structures if not already done. */ | |
1935 | if (f->desired_pool == NULL) | |
1936 | { | |
1937 | f->desired_pool = new_glyph_pool (); | |
1938 | f->current_pool = new_glyph_pool (); | |
1939 | } | |
1940 | ||
1941 | /* Allocate frames matrix structures if needed. */ | |
1942 | if (f->desired_matrix == NULL) | |
1943 | { | |
1944 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1945 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
1946 | } | |
177c0ea7 | 1947 | |
5f5c8ee5 GM |
1948 | /* Compute window glyph matrices. (This takes the mini-buffer |
1949 | window into account). The result is the size of the frame glyph | |
1950 | matrix needed. The variable window_change_flags is set to a bit | |
1951 | mask indicating whether new matrices will be allocated or | |
1952 | existing matrices change their size or location within the frame | |
1953 | matrix. */ | |
1954 | window_change_flags = 0; | |
1955 | matrix_dim | |
1956 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
1957 | 0, top_window_y, | |
5d3cc43c | 1958 | 1, |
5f5c8ee5 GM |
1959 | &window_change_flags); |
1960 | ||
1961 | /* Add in menu bar lines, if any. */ | |
1962 | matrix_dim.height += top_window_y; | |
1963 | ||
1964 | /* Enlarge pools as necessary. */ | |
1965 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
1966 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
1967 | ||
177c0ea7 | 1968 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
1969 | absolutely necessary since it requires a frame redraw. */ |
1970 | if (pool_changed_p || window_change_flags) | |
1971 | { | |
1972 | /* Do it for window matrices. */ | |
1973 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 1974 | 0, top_window_y, 0, |
5f5c8ee5 GM |
1975 | &window_change_flags); |
1976 | ||
1977 | /* Size of frame matrices must equal size of frame. Note | |
1978 | that we are called for X frames with window widths NOT equal | |
1979 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
a54e2c05 | 1980 | eassert (matrix_dim.width == FRAME_COLS (f) |
7df02016 | 1981 | && matrix_dim.height == FRAME_LINES (f)); |
177c0ea7 | 1982 | |
e797dea6 GM |
1983 | /* Pointers to glyph memory in glyph rows are exchanged during |
1984 | the update phase of redisplay, which means in general that a | |
1985 | frame's current matrix consists of pointers into both the | |
1986 | desired and current glyph pool of the frame. Adjusting a | |
1987 | matrix sets the frame matrix up so that pointers are all into | |
1988 | the same pool. If we want to preserve glyph contents of the | |
1989 | current matrix over a call to adjust_glyph_matrix, we must | |
1990 | make a copy of the current glyphs, and restore the current | |
1991 | matrix' contents from that copy. */ | |
1992 | if (display_completed | |
1993 | && !FRAME_GARBAGED_P (f) | |
1994 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
1995 | && matrix_dim.height == f->current_matrix->matrix_h |
1996 | /* For some reason, the frame glyph matrix gets corrupted if | |
1997 | any of the windows contain margins. I haven't been able | |
1998 | to hunt down the reason, but for the moment this prevents | |
1999 | the problem from manifesting. -- cyd */ | |
d5c20fe8 | 2000 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) |
e797dea6 | 2001 | { |
bccee4f2 GM |
2002 | struct glyph_matrix *copy = save_current_matrix (f); |
2003 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2004 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2005 | restore_current_matrix (f, copy); |
e797dea6 GM |
2006 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2007 | } | |
c9f00270 | 2008 | else |
e797dea6 | 2009 | { |
bccee4f2 | 2010 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2011 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2012 | SET_FRAME_GARBAGED (f); | |
2013 | } | |
5f5c8ee5 GM |
2014 | } |
2015 | } | |
2016 | ||
2017 | ||
2018 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2019 | window-based redisplay. */ | |
2020 | ||
2021 | static void | |
971de7fb | 2022 | adjust_frame_glyphs_for_window_redisplay (struct frame *f) |
5f5c8ee5 | 2023 | { |
a54e2c05 | 2024 | eassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); |
177c0ea7 | 2025 | |
5f5c8ee5 | 2026 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2027 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2028 | |
742516e0 | 2029 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2030 | /* Allocate/ reallocate matrices of the dummy window used to display |
2031 | the menu bar under X when no X toolkit support is available. */ | |
5f5c8ee5 GM |
2032 | { |
2033 | /* Allocate a dummy window if not already done. */ | |
d2d37ddc | 2034 | struct window *w; |
e69b0960 | 2035 | if (NILP (f->menu_bar_window)) |
5f5c8ee5 | 2036 | { |
077288cf | 2037 | Lisp_Object frame; |
f00af5b1 | 2038 | fset_menu_bar_window (f, make_window ()); |
e69b0960 | 2039 | w = XWINDOW (f->menu_bar_window); |
077288cf | 2040 | XSETFRAME (frame, f); |
e8c17b81 | 2041 | wset_frame (w, frame); |
5f5c8ee5 GM |
2042 | w->pseudo_window_p = 1; |
2043 | } | |
2044 | else | |
e69b0960 | 2045 | w = XWINDOW (f->menu_bar_window); |
5f5c8ee5 GM |
2046 | |
2047 | /* Set window dimensions to frame dimensions and allocate or | |
2048 | adjust glyph matrices of W. */ | |
5f24fa51 DA |
2049 | w->top_line = 0; |
2050 | w->left_col = 0; | |
2051 | w->total_lines = FRAME_MENU_BAR_LINES (f); | |
2052 | w->total_cols = FRAME_TOTAL_COLS (f); | |
5d3cc43c | 2053 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2054 | } |
742516e0 | 2055 | #endif |
5f5c8ee5 | 2056 | |
742516e0 | 2057 | #if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS) |
d2d37ddc PE |
2058 | { |
2059 | /* Allocate/ reallocate matrices of the tool bar window. If we | |
2060 | don't have a tool bar window yet, make one. */ | |
2061 | struct window *w; | |
e69b0960 | 2062 | if (NILP (f->tool_bar_window)) |
d2d37ddc | 2063 | { |
077288cf | 2064 | Lisp_Object frame; |
f00af5b1 | 2065 | fset_tool_bar_window (f, make_window ()); |
e69b0960 | 2066 | w = XWINDOW (f->tool_bar_window); |
077288cf | 2067 | XSETFRAME (frame, f); |
e8c17b81 | 2068 | wset_frame (w, frame); |
d2d37ddc PE |
2069 | w->pseudo_window_p = 1; |
2070 | } | |
2071 | else | |
e69b0960 | 2072 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2073 | |
5f24fa51 DA |
2074 | w->top_line = FRAME_MENU_BAR_LINES (f); |
2075 | w->left_col = 0; | |
2076 | w->total_lines = FRAME_TOOL_BAR_LINES (f); | |
2077 | w->total_cols = FRAME_TOTAL_COLS (f); | |
d2d37ddc PE |
2078 | allocate_matrices_for_window_redisplay (w); |
2079 | } | |
488dd4c4 | 2080 | #endif |
5f5c8ee5 GM |
2081 | } |
2082 | ||
2083 | ||
5f5c8ee5 GM |
2084 | /* Re-allocate buffer for decode_mode_spec on frame F. */ |
2085 | ||
2086 | static void | |
971de7fb | 2087 | adjust_decode_mode_spec_buffer (struct frame *f) |
5f5c8ee5 | 2088 | { |
38182d90 PE |
2089 | f->decode_mode_spec_buffer = xrealloc (f->decode_mode_spec_buffer, |
2090 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
5f5c8ee5 GM |
2091 | } |
2092 | ||
2093 | ||
2094 | \f | |
2095 | /********************************************************************** | |
2096 | Freeing Glyph Matrices | |
2097 | **********************************************************************/ | |
2098 | ||
2099 | /* Free glyph memory for a frame F. F may be null. This function can | |
2100 | be called for the same frame more than once. The root window of | |
2101 | F may be nil when this function is called. This is the case when | |
2102 | the function is called when F is destroyed. */ | |
2103 | ||
2104 | void | |
971de7fb | 2105 | free_glyphs (struct frame *f) |
5f5c8ee5 GM |
2106 | { |
2107 | if (f && f->glyphs_initialized_p) | |
2108 | { | |
42f55fe0 GM |
2109 | /* Block interrupt input so that we don't get surprised by an X |
2110 | event while we're in an inconsistent state. */ | |
4d7e6e51 | 2111 | block_input (); |
5f5c8ee5 | 2112 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2113 | |
5f5c8ee5 | 2114 | /* Release window sub-matrices. */ |
e69b0960 DA |
2115 | if (!NILP (f->root_window)) |
2116 | free_window_matrices (XWINDOW (f->root_window)); | |
5f5c8ee5 | 2117 | |
5a49b79c | 2118 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2119 | /* Free the dummy window for menu bars without X toolkit and its |
2120 | glyph matrices. */ | |
e69b0960 | 2121 | if (!NILP (f->menu_bar_window)) |
5f5c8ee5 | 2122 | { |
e69b0960 | 2123 | struct window *w = XWINDOW (f->menu_bar_window); |
5f5c8ee5 GM |
2124 | free_glyph_matrix (w->desired_matrix); |
2125 | free_glyph_matrix (w->current_matrix); | |
2126 | w->desired_matrix = w->current_matrix = NULL; | |
f00af5b1 | 2127 | fset_menu_bar_window (f, Qnil); |
5f5c8ee5 | 2128 | } |
5a49b79c | 2129 | #endif |
5f5c8ee5 | 2130 | |
742516e0 | 2131 | #if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS) |
9ea173e8 | 2132 | /* Free the tool bar window and its glyph matrices. */ |
e69b0960 | 2133 | if (!NILP (f->tool_bar_window)) |
5f5c8ee5 | 2134 | { |
e69b0960 | 2135 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2136 | free_glyph_matrix (w->desired_matrix); |
2137 | free_glyph_matrix (w->current_matrix); | |
2138 | w->desired_matrix = w->current_matrix = NULL; | |
f00af5b1 | 2139 | fset_tool_bar_window (f, Qnil); |
5f5c8ee5 | 2140 | } |
742516e0 | 2141 | #endif |
5f5c8ee5 GM |
2142 | |
2143 | /* Release frame glyph matrices. Reset fields to zero in | |
2144 | case we are called a second time. */ | |
2145 | if (f->desired_matrix) | |
2146 | { | |
2147 | free_glyph_matrix (f->desired_matrix); | |
2148 | free_glyph_matrix (f->current_matrix); | |
2149 | f->desired_matrix = f->current_matrix = NULL; | |
2150 | } | |
2151 | ||
2152 | /* Release glyph pools. */ | |
2153 | if (f->desired_pool) | |
2154 | { | |
2155 | free_glyph_pool (f->desired_pool); | |
2156 | free_glyph_pool (f->current_pool); | |
2157 | f->desired_pool = f->current_pool = NULL; | |
2158 | } | |
177c0ea7 | 2159 | |
4d7e6e51 | 2160 | unblock_input (); |
5f5c8ee5 GM |
2161 | } |
2162 | } | |
2163 | ||
2164 | ||
2165 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2166 | function may be called with a null pointer, and it may be called on | |
2167 | the same tree more than once. */ | |
2168 | ||
2169 | void | |
971de7fb | 2170 | free_window_matrices (struct window *w) |
5f5c8ee5 GM |
2171 | { |
2172 | while (w) | |
2173 | { | |
e74aeda8 DA |
2174 | if (WINDOWP (w->contents)) |
2175 | free_window_matrices (XWINDOW (w->contents)); | |
177c0ea7 | 2176 | else |
5f5c8ee5 GM |
2177 | { |
2178 | /* This is a leaf window. Free its memory and reset fields | |
2179 | to zero in case this function is called a second time for | |
2180 | W. */ | |
2181 | free_glyph_matrix (w->current_matrix); | |
2182 | free_glyph_matrix (w->desired_matrix); | |
2183 | w->current_matrix = w->desired_matrix = NULL; | |
2184 | } | |
2185 | ||
2186 | /* Next window on same level. */ | |
d3d50620 | 2187 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2188 | } |
2189 | } | |
2190 | ||
2191 | ||
2192 | /* Check glyph memory leaks. This function is called from | |
2193 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2194 | exits. We therefore free all glyph memory for all active frames | |
2195 | explicitly and check that nothing is left allocated. */ | |
2196 | ||
2197 | void | |
971de7fb | 2198 | check_glyph_memory (void) |
5f5c8ee5 GM |
2199 | { |
2200 | Lisp_Object tail, frame; | |
2201 | ||
2202 | /* Free glyph memory for all frames. */ | |
2203 | FOR_EACH_FRAME (tail, frame) | |
2204 | free_glyphs (XFRAME (frame)); | |
2205 | ||
f0b79313 | 2206 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
5f5c8ee5 | 2207 | /* Check that nothing is left allocated. */ |
f0b79313 DA |
2208 | eassert (glyph_matrix_count == 0); |
2209 | eassert (glyph_pool_count == 0); | |
2210 | #endif | |
5f5c8ee5 GM |
2211 | } |
2212 | ||
2213 | ||
2214 | \f | |
2215 | /********************************************************************** | |
2216 | Building a Frame Matrix | |
2217 | **********************************************************************/ | |
2218 | ||
2219 | /* Most of the redisplay code works on glyph matrices attached to | |
2220 | windows. This is a good solution most of the time, but it is not | |
2221 | suitable for terminal code. Terminal output functions cannot rely | |
2222 | on being able to set an arbitrary terminal window. Instead they | |
2223 | must be provided with a view of the whole frame, i.e. the whole | |
2224 | screen. We build such a view by constructing a frame matrix from | |
2225 | window matrices in this section. | |
2226 | ||
65620264 | 2227 | Windows that must be updated have their must_be_updated_p flag set. |
5f5c8ee5 GM |
2228 | For all such windows, their desired matrix is made part of the |
2229 | desired frame matrix. For other windows, their current matrix is | |
2230 | made part of the desired frame matrix. | |
2231 | ||
2232 | +-----------------+----------------+ | |
2233 | | desired | desired | | |
2234 | | | | | |
2235 | +-----------------+----------------+ | |
2236 | | current | | |
2237 | | | | |
2238 | +----------------------------------+ | |
2239 | ||
2240 | Desired window matrices can be made part of the frame matrix in a | |
2241 | cheap way: We exploit the fact that the desired frame matrix and | |
2242 | desired window matrices share their glyph memory. This is not | |
2243 | possible for current window matrices. Their glyphs are copied to | |
2244 | the desired frame matrix. The latter is equivalent to | |
2245 | preserve_other_columns in the old redisplay. | |
2246 | ||
2247 | Used glyphs counters for frame matrix rows are the result of adding | |
2248 | up glyph lengths of the window matrices. A line in the frame | |
2249 | matrix is enabled, if a corresponding line in a window matrix is | |
2250 | enabled. | |
177c0ea7 | 2251 | |
5f5c8ee5 GM |
2252 | After building the desired frame matrix, it will be passed to |
2253 | terminal code, which will manipulate both the desired and current | |
2254 | frame matrix. Changes applied to the frame's current matrix have | |
2255 | to be visible in current window matrices afterwards, of course. | |
2256 | ||
2257 | This problem is solved like this: | |
2258 | ||
2259 | 1. Window and frame matrices share glyphs. Window matrices are | |
2260 | constructed in a way that their glyph contents ARE the glyph | |
2261 | contents needed in a frame matrix. Thus, any modification of | |
2262 | glyphs done in terminal code will be reflected in window matrices | |
2263 | automatically. | |
177c0ea7 | 2264 | |
5f5c8ee5 GM |
2265 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2266 | intercepted by hook functions so that corresponding row operations | |
2267 | on window matrices can be performed. This is necessary because we | |
2268 | use pointers to glyphs in glyph row structures. To satisfy the | |
2269 | assumption of point 1 above that glyphs are updated implicitly in | |
2270 | window matrices when they are manipulated via the frame matrix, | |
2271 | window and frame matrix must of course agree where to find the | |
2272 | glyphs for their rows. Possible manipulations that must be | |
2273 | mirrored are assignments of rows of the desired frame matrix to the | |
2274 | current frame matrix and scrolling the current frame matrix. */ | |
2275 | ||
2276 | /* Build frame F's desired matrix from window matrices. Only windows | |
2277 | which have the flag must_be_updated_p set have to be updated. Menu | |
2278 | bar lines of a frame are not covered by window matrices, so make | |
2279 | sure not to touch them in this function. */ | |
2280 | ||
2281 | static void | |
971de7fb | 2282 | build_frame_matrix (struct frame *f) |
5f5c8ee5 GM |
2283 | { |
2284 | int i; | |
2285 | ||
2286 | /* F must have a frame matrix when this function is called. */ | |
a54e2c05 | 2287 | eassert (!FRAME_WINDOW_P (f)); |
177c0ea7 | 2288 | |
5f5c8ee5 GM |
2289 | /* Clear all rows in the frame matrix covered by window matrices. |
2290 | Menu bar lines are not covered by windows. */ | |
2291 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2292 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2293 | ||
2294 | /* Build the matrix by walking the window tree. */ | |
2295 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2296 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2297 | } | |
2298 | ||
2299 | ||
2300 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2301 | matrices. W is the root of a window tree. */ | |
2302 | ||
2303 | static void | |
971de7fb | 2304 | build_frame_matrix_from_window_tree (struct glyph_matrix *matrix, struct window *w) |
5f5c8ee5 GM |
2305 | { |
2306 | while (w) | |
2307 | { | |
e74aeda8 DA |
2308 | if (WINDOWP (w->contents)) |
2309 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->contents)); | |
5f5c8ee5 GM |
2310 | else |
2311 | build_frame_matrix_from_leaf_window (matrix, w); | |
2312 | ||
d3d50620 | 2313 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2314 | } |
2315 | } | |
2316 | ||
2317 | ||
2318 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2319 | desired frame matrix built. W is a leaf window whose desired or | |
2320 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2321 | must_be_updated_p determines which matrix it contributes to | |
59ea14cd | 2322 | FRAME_MATRIX. If W->must_be_updated_p, W's desired matrix |
5f5c8ee5 GM |
2323 | is added to FRAME_MATRIX, otherwise W's current matrix is added. |
2324 | Adding a desired matrix means setting up used counters and such in | |
2325 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2326 | means copying glyphs. The latter case corresponds to | |
2327 | preserve_other_columns in the old redisplay. */ | |
2328 | ||
2329 | static void | |
971de7fb | 2330 | build_frame_matrix_from_leaf_window (struct glyph_matrix *frame_matrix, struct window *w) |
5f5c8ee5 GM |
2331 | { |
2332 | struct glyph_matrix *window_matrix; | |
2333 | int window_y, frame_y; | |
2334 | /* If non-zero, a glyph to insert at the right border of W. */ | |
3fc809e2 KS |
2335 | GLYPH right_border_glyph; |
2336 | ||
2337 | SET_GLYPH_FROM_CHAR (right_border_glyph, 0); | |
5f5c8ee5 GM |
2338 | |
2339 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2340 | if (w->must_be_updated_p) | |
2341 | { | |
2342 | window_matrix = w->desired_matrix; | |
2343 | ||
2344 | /* Decide whether we want to add a vertical border glyph. */ | |
2345 | if (!WINDOW_RIGHTMOST_P (w)) | |
2346 | { | |
2347 | struct Lisp_Char_Table *dp = window_display_table (w); | |
3fc809e2 | 2348 | Lisp_Object gc; |
b4e49aee | 2349 | |
3fc809e2 KS |
2350 | SET_GLYPH_FROM_CHAR (right_border_glyph, '|'); |
2351 | if (dp | |
d311d28c | 2352 | && (gc = DISP_BORDER_GLYPH (dp), GLYPH_CODE_P (gc))) |
3fc809e2 KS |
2353 | { |
2354 | SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph, gc); | |
2355 | spec_glyph_lookup_face (w, &right_border_glyph); | |
2356 | } | |
b4e49aee | 2357 | |
3fc809e2 KS |
2358 | if (GLYPH_FACE (right_border_glyph) <= 0) |
2359 | SET_GLYPH_FACE (right_border_glyph, VERTICAL_BORDER_FACE_ID); | |
5f5c8ee5 GM |
2360 | } |
2361 | } | |
2362 | else | |
2363 | window_matrix = w->current_matrix; | |
2364 | ||
2365 | /* For all rows in the window matrix and corresponding rows in the | |
2366 | frame matrix. */ | |
2367 | window_y = 0; | |
2368 | frame_y = window_matrix->matrix_y; | |
2369 | while (window_y < window_matrix->nrows) | |
2370 | { | |
2371 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2372 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
59ea14cd | 2373 | bool current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2374 | |
2375 | /* Fill up the frame row with spaces up to the left margin of the | |
2376 | window row. */ | |
2377 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2378 | ||
2379 | /* Fill up areas in the window matrix row with spaces. */ | |
2380 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2381 | |
2382 | /* If only part of W's desired matrix has been built, and | |
2383 | window_row wasn't displayed, use the corresponding current | |
2384 | row instead. */ | |
2385 | if (window_matrix == w->desired_matrix | |
2386 | && !window_row->enabled_p) | |
2387 | { | |
2388 | window_row = w->current_matrix->rows + window_y; | |
2389 | current_row_p = 1; | |
2390 | } | |
177c0ea7 | 2391 | |
2a8bd25f | 2392 | if (current_row_p) |
5f5c8ee5 | 2393 | { |
2a8bd25f | 2394 | /* Copy window row to frame row. */ |
72af86bd AS |
2395 | memcpy (frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, |
2396 | window_row->glyphs[0], | |
2397 | window_matrix->matrix_w * sizeof (struct glyph)); | |
5f5c8ee5 GM |
2398 | } |
2399 | else | |
2400 | { | |
a54e2c05 | 2401 | eassert (window_row->enabled_p); |
177c0ea7 | 2402 | |
2a8bd25f GM |
2403 | /* Only when a desired row has been displayed, we want |
2404 | the corresponding frame row to be updated. */ | |
2405 | frame_row->enabled_p = 1; | |
177c0ea7 | 2406 | |
5f5c8ee5 GM |
2407 | /* Maybe insert a vertical border between horizontally adjacent |
2408 | windows. */ | |
3fc809e2 | 2409 | if (GLYPH_CHAR (right_border_glyph) != 0) |
5f5c8ee5 GM |
2410 | { |
2411 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2412 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2413 | } | |
2414 | ||
e509cfa6 | 2415 | #ifdef GLYPH_DEBUG |
a13396c9 GM |
2416 | /* Window row window_y must be a slice of frame row |
2417 | frame_y. */ | |
a54e2c05 | 2418 | eassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2419 | |
5f5c8ee5 GM |
2420 | /* If rows are in sync, we don't have to copy glyphs because |
2421 | frame and window share glyphs. */ | |
177c0ea7 | 2422 | |
a38634ff | 2423 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2424 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2425 | #endif |
5f5c8ee5 GM |
2426 | } |
2427 | ||
2428 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2429 | up with spaces, and visit leaf windows from left to right it | |
2430 | can be done simply. */ | |
177c0ea7 | 2431 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2432 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2433 | ||
5f5c8ee5 GM |
2434 | /* Next row. */ |
2435 | ++window_y; | |
2436 | ++frame_y; | |
2437 | } | |
2438 | } | |
2439 | ||
5f81871e RS |
2440 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2441 | ID, return a glyph that has a realized face ID. | |
2442 | This is used for glyphs displayed specially and not part of the text; | |
2443 | for instance, vertical separators, truncation markers, etc. */ | |
2444 | ||
3fc809e2 | 2445 | void |
971de7fb | 2446 | spec_glyph_lookup_face (struct window *w, GLYPH *glyph) |
5f81871e | 2447 | { |
3fc809e2 | 2448 | int lface_id = GLYPH_FACE (*glyph); |
5f81871e RS |
2449 | /* Convert the glyph's specified face to a realized (cache) face. */ |
2450 | if (lface_id > 0) | |
2451 | { | |
d3d50620 | 2452 | int face_id = merge_faces (XFRAME (w->frame), |
5f81871e | 2453 | Qt, lface_id, DEFAULT_FACE_ID); |
3fc809e2 | 2454 | SET_GLYPH_FACE (*glyph, face_id); |
5f81871e | 2455 | } |
5f81871e | 2456 | } |
5f5c8ee5 GM |
2457 | |
2458 | /* Add spaces to a glyph row ROW in a window matrix. | |
2459 | ||
2460 | Each row has the form: | |
2461 | ||
2462 | +---------+-----------------------------+------------+ | |
2463 | | left | text | right | | |
2464 | +---------+-----------------------------+------------+ | |
2465 | ||
2466 | Left and right marginal areas are optional. This function adds | |
2467 | spaces to areas so that there are no empty holes between areas. | |
2468 | In other words: If the right area is not empty, the text area | |
2469 | is filled up with spaces up to the right area. If the text area | |
2470 | is not empty, the left area is filled up. | |
2471 | ||
2472 | To be called for frame-based redisplay, only. */ | |
2473 | ||
2474 | static void | |
971de7fb | 2475 | fill_up_glyph_row_with_spaces (struct glyph_row *row) |
5f5c8ee5 GM |
2476 | { |
2477 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2478 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2479 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2480 | } | |
2481 | ||
2482 | ||
2483 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2484 | frame-based redisplay only. */ | |
2485 | ||
2486 | static void | |
971de7fb | 2487 | fill_up_glyph_row_area_with_spaces (struct glyph_row *row, int area) |
5f5c8ee5 GM |
2488 | { |
2489 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2490 | { | |
2491 | struct glyph *end = row->glyphs[area + 1]; | |
2492 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2493 | ||
2494 | while (text < end) | |
2495 | *text++ = space_glyph; | |
2496 | row->used[area] = text - row->glyphs[area]; | |
2497 | } | |
2498 | } | |
2499 | ||
2500 | ||
2501 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2502 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2503 | ||
abe02020 | 2504 | void |
971de7fb | 2505 | fill_up_frame_row_with_spaces (struct glyph_row *row, int upto) |
5f5c8ee5 GM |
2506 | { |
2507 | int i = row->used[TEXT_AREA]; | |
2508 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2509 | |
5f5c8ee5 GM |
2510 | while (i < upto) |
2511 | glyph[i++] = space_glyph; | |
2512 | ||
2513 | row->used[TEXT_AREA] = i; | |
2514 | } | |
2515 | ||
2516 | ||
2517 | \f | |
2518 | /********************************************************************** | |
2519 | Mirroring operations on frame matrices in window matrices | |
2520 | **********************************************************************/ | |
2521 | ||
2522 | /* Set frame being updated via frame-based redisplay to F. This | |
2523 | function must be called before updates to make explicit that we are | |
2524 | working on frame matrices or not. */ | |
2525 | ||
b0ab8123 | 2526 | static void |
971de7fb | 2527 | set_frame_matrix_frame (struct frame *f) |
5f5c8ee5 GM |
2528 | { |
2529 | frame_matrix_frame = f; | |
2530 | } | |
2531 | ||
2532 | ||
2533 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2534 | DESIRED_MATRIX is the desired matrix corresponding to | |
2535 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2536 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2537 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2538 | done in frame matrices, and that we have to perform analogous | |
2539 | operations in window matrices of frame_matrix_frame. */ | |
2540 | ||
b0ab8123 | 2541 | static void |
971de7fb | 2542 | make_current (struct glyph_matrix *desired_matrix, struct glyph_matrix *current_matrix, int row) |
5f5c8ee5 GM |
2543 | { |
2544 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2545 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
59ea14cd | 2546 | bool mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2547 | |
2548 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2549 | between both rows, and does a structure assignment otherwise. */ | |
2550 | assign_row (current_row, desired_row); | |
2551 | ||
2552 | /* Enable current_row to mark it as valid. */ | |
2553 | current_row->enabled_p = 1; | |
e876ff42 | 2554 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2555 | |
2556 | /* If we are called on frame matrices, perform analogous operations | |
2557 | for window matrices. */ | |
2558 | if (frame_matrix_frame) | |
e69b0960 | 2559 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); |
5f5c8ee5 GM |
2560 | } |
2561 | ||
2562 | ||
2563 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2564 | W's frame which has been made current (by swapping pointers between | |
2565 | current and desired matrix). Perform analogous operations in the | |
2566 | matrices of leaf windows in the window tree rooted at W. */ | |
2567 | ||
2568 | static void | |
971de7fb | 2569 | mirror_make_current (struct window *w, int frame_row) |
5f5c8ee5 GM |
2570 | { |
2571 | while (w) | |
2572 | { | |
e74aeda8 DA |
2573 | if (WINDOWP (w->contents)) |
2574 | mirror_make_current (XWINDOW (w->contents), frame_row); | |
5f5c8ee5 GM |
2575 | else |
2576 | { | |
2577 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2578 | here because the checks performed in debug mode there | |
2579 | will not allow the conversion. */ | |
2580 | int row = frame_row - w->desired_matrix->matrix_y; | |
2581 | ||
2582 | /* If FRAME_ROW is within W, assign the desired row to the | |
2583 | current row (exchanging glyph pointers). */ | |
2584 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
2585 | { | |
2586 | struct glyph_row *current_row | |
2587 | = MATRIX_ROW (w->current_matrix, row); | |
2588 | struct glyph_row *desired_row | |
2589 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
2590 | |
2591 | if (desired_row->enabled_p) | |
2592 | assign_row (current_row, desired_row); | |
2593 | else | |
2594 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 | 2595 | current_row->enabled_p = 1; |
d009ae66 EZ |
2596 | |
2597 | /* Set the Y coordinate of the mode/header line's row. | |
2598 | It is needed in draw_row_with_mouse_face to find the | |
2599 | screen coordinates. (Window-based redisplay sets | |
2600 | this in update_window, but no one seems to do that | |
2601 | for frame-based redisplay.) */ | |
2602 | if (current_row->mode_line_p) | |
2603 | current_row->y = row; | |
5f5c8ee5 GM |
2604 | } |
2605 | } | |
177c0ea7 | 2606 | |
d3d50620 | 2607 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2608 | } |
2609 | } | |
2610 | ||
2611 | ||
2612 | /* Perform row dance after scrolling. We are working on the range of | |
2613 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
2614 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
2615 | row I in the range 0 <= I < NLINES, the index of the original line | |
2616 | to move to I. This index is relative to the row range, i.e. 0 <= | |
2617 | index < NLINES. RETAINED_P is a vector containing zero for each | |
2618 | row 0 <= I < NLINES which is empty. | |
2619 | ||
2620 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 2621 | |
5f5c8ee5 | 2622 | void |
6f704c76 DN |
2623 | mirrored_line_dance (struct glyph_matrix *matrix, int unchanged_at_top, int nlines, |
2624 | int *copy_from, char *retained_p) | |
5f5c8ee5 GM |
2625 | { |
2626 | /* A copy of original rows. */ | |
2627 | struct glyph_row *old_rows; | |
2628 | ||
2629 | /* Rows to assign to. */ | |
2630 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 2631 | |
5f5c8ee5 GM |
2632 | int i; |
2633 | ||
2634 | /* Make a copy of the original rows. */ | |
38182d90 | 2635 | old_rows = alloca (nlines * sizeof *old_rows); |
72af86bd | 2636 | memcpy (old_rows, new_rows, nlines * sizeof *old_rows); |
5f5c8ee5 GM |
2637 | |
2638 | /* Assign new rows, maybe clear lines. */ | |
2639 | for (i = 0; i < nlines; ++i) | |
2640 | { | |
59ea14cd | 2641 | bool enabled_before_p = new_rows[i].enabled_p; |
5f5c8ee5 | 2642 | |
a54e2c05 DA |
2643 | eassert (i + unchanged_at_top < matrix->nrows); |
2644 | eassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
5f5c8ee5 GM |
2645 | new_rows[i] = old_rows[copy_from[i]]; |
2646 | new_rows[i].enabled_p = enabled_before_p; | |
2647 | ||
2648 | /* RETAINED_P is zero for empty lines. */ | |
2649 | if (!retained_p[copy_from[i]]) | |
2650 | new_rows[i].enabled_p = 0; | |
2651 | } | |
2652 | ||
153a073c | 2653 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 | 2654 | if (frame_matrix_frame) |
e69b0960 | 2655 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), |
5f5c8ee5 GM |
2656 | unchanged_at_top, nlines, copy_from, retained_p); |
2657 | } | |
2658 | ||
2659 | ||
a13396c9 | 2660 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 2661 | the current frame matrix. */ |
a13396c9 GM |
2662 | |
2663 | static void | |
971de7fb | 2664 | sync_window_with_frame_matrix_rows (struct window *w) |
a13396c9 | 2665 | { |
d3d50620 | 2666 | struct frame *f = XFRAME (w->frame); |
a13396c9 | 2667 | struct glyph_row *window_row, *window_row_end, *frame_row; |
075c507b | 2668 | int left, right, x, width; |
a13396c9 | 2669 | |
e74aeda8 DA |
2670 | /* Preconditions: W must be a live window on a tty frame. */ |
2671 | eassert (BUFFERP (w->contents)); | |
a54e2c05 | 2672 | eassert (!FRAME_WINDOW_P (f)); |
a13396c9 | 2673 | |
d3d50620 DA |
2674 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
2675 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
2676 | x = w->current_matrix->matrix_x; |
2677 | width = w->current_matrix->matrix_w; | |
2678 | ||
a13396c9 GM |
2679 | window_row = w->current_matrix->rows; |
2680 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 2681 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 2682 | |
5cb88111 | 2683 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 2684 | { |
5cb88111 GM |
2685 | window_row->glyphs[LEFT_MARGIN_AREA] |
2686 | = frame_row->glyphs[0] + x; | |
2687 | window_row->glyphs[TEXT_AREA] | |
2688 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
2689 | window_row->glyphs[LAST_AREA] | |
2690 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
2691 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
2692 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
2693 | } |
2694 | } | |
2695 | ||
2696 | ||
2697 | /* Return the window in the window tree rooted in W containing frame | |
2698 | row ROW. Value is null if none is found. */ | |
2699 | ||
09ad5a91 | 2700 | static struct window * |
971de7fb | 2701 | frame_row_to_window (struct window *w, int row) |
a13396c9 GM |
2702 | { |
2703 | struct window *found = NULL; | |
177c0ea7 | 2704 | |
a13396c9 GM |
2705 | while (w && !found) |
2706 | { | |
e74aeda8 DA |
2707 | if (WINDOWP (w->contents)) |
2708 | found = frame_row_to_window (XWINDOW (w->contents), row); | |
7df02016 KS |
2709 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
2710 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 2711 | found = w; |
177c0ea7 | 2712 | |
d3d50620 | 2713 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
a13396c9 GM |
2714 | } |
2715 | ||
2716 | return found; | |
2717 | } | |
2718 | ||
2719 | ||
5f5c8ee5 GM |
2720 | /* Perform a line dance in the window tree rooted at W, after |
2721 | scrolling a frame matrix in mirrored_line_dance. | |
2722 | ||
2723 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
2724 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
2725 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
2726 | I < NLINES, the index of the original line to move to I. This | |
2727 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
2728 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
2729 | which is empty. */ | |
2730 | ||
2731 | static void | |
971de7fb | 2732 | mirror_line_dance (struct window *w, int unchanged_at_top, int nlines, int *copy_from, char *retained_p) |
5f5c8ee5 GM |
2733 | { |
2734 | while (w) | |
2735 | { | |
e74aeda8 DA |
2736 | if (WINDOWP (w->contents)) |
2737 | mirror_line_dance (XWINDOW (w->contents), unchanged_at_top, | |
5f5c8ee5 GM |
2738 | nlines, copy_from, retained_p); |
2739 | else | |
2740 | { | |
2741 | /* W is a leaf window, and we are working on its current | |
2742 | matrix m. */ | |
2743 | struct glyph_matrix *m = w->current_matrix; | |
59ea14cd PE |
2744 | int i; |
2745 | bool sync_p = 0; | |
5f5c8ee5 GM |
2746 | struct glyph_row *old_rows; |
2747 | ||
2748 | /* Make a copy of the original rows of matrix m. */ | |
38182d90 | 2749 | old_rows = alloca (m->nrows * sizeof *old_rows); |
72af86bd | 2750 | memcpy (old_rows, m->rows, m->nrows * sizeof *old_rows); |
5f5c8ee5 GM |
2751 | |
2752 | for (i = 0; i < nlines; ++i) | |
2753 | { | |
2754 | /* Frame relative line assigned to. */ | |
2755 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 2756 | |
5f5c8ee5 GM |
2757 | /* Frame relative line assigned. */ |
2758 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 2759 | |
5f5c8ee5 GM |
2760 | /* Window relative line assigned to. */ |
2761 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 2762 | |
5f5c8ee5 GM |
2763 | /* Window relative line assigned. */ |
2764 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 2765 | |
5f5c8ee5 | 2766 | /* Is assigned line inside window? */ |
59ea14cd | 2767 | bool from_inside_window_p |
5f5c8ee5 | 2768 | = window_from >= 0 && window_from < m->matrix_h; |
177c0ea7 | 2769 | |
a13396c9 | 2770 | /* Is assigned to line inside window? */ |
59ea14cd | 2771 | bool to_inside_window_p |
a13396c9 | 2772 | = window_to >= 0 && window_to < m->matrix_h; |
177c0ea7 | 2773 | |
a13396c9 | 2774 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 2775 | { |
5f5c8ee5 GM |
2776 | /* Do the assignment. The enabled_p flag is saved |
2777 | over the assignment because the old redisplay did | |
2778 | that. */ | |
59ea14cd | 2779 | bool enabled_before_p = m->rows[window_to].enabled_p; |
5f5c8ee5 GM |
2780 | m->rows[window_to] = old_rows[window_from]; |
2781 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 2782 | |
5f5c8ee5 GM |
2783 | /* If frame line is empty, window line is empty, too. */ |
2784 | if (!retained_p[copy_from[i]]) | |
2785 | m->rows[window_to].enabled_p = 0; | |
2786 | } | |
a13396c9 GM |
2787 | else if (to_inside_window_p) |
2788 | { | |
2789 | /* A copy between windows. This is an infrequent | |
2790 | case not worth optimizing. */ | |
d3d50620 | 2791 | struct frame *f = XFRAME (w->frame); |
a13396c9 GM |
2792 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
2793 | struct window *w2; | |
2794 | struct glyph_matrix *m2; | |
2795 | int m2_from; | |
2796 | ||
fe8b8401 | 2797 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
2798 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
2799 | -nw', FROM_FRAME sometimes has no associated window. | |
2800 | This check avoids a segfault if W2 is null. */ | |
2801 | if (w2) | |
2802 | { | |
2803 | m2 = w2->current_matrix; | |
2804 | m2_from = frame_from - m2->matrix_y; | |
2805 | copy_row_except_pointers (m->rows + window_to, | |
2806 | m2->rows + m2_from); | |
2807 | ||
2808 | /* If frame line is empty, window line is empty, too. */ | |
2809 | if (!retained_p[copy_from[i]]) | |
2810 | m->rows[window_to].enabled_p = 0; | |
2811 | } | |
a13396c9 GM |
2812 | sync_p = 1; |
2813 | } | |
2814 | else if (from_inside_window_p) | |
2815 | sync_p = 1; | |
5f5c8ee5 | 2816 | } |
a13396c9 GM |
2817 | |
2818 | /* If there was a copy between windows, make sure glyph | |
2819 | pointers are in sync with the frame matrix. */ | |
2820 | if (sync_p) | |
2821 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 2822 | |
5f5c8ee5 GM |
2823 | /* Check that no pointers are lost. */ |
2824 | CHECK_MATRIX (m); | |
2825 | } | |
2826 | ||
2827 | /* Next window on same level. */ | |
d3d50620 | 2828 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2829 | } |
2830 | } | |
2831 | ||
2832 | ||
e509cfa6 | 2833 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
2834 | |
2835 | /* Check that window and frame matrices agree about their | |
2836 | understanding where glyphs of the rows are to find. For each | |
2837 | window in the window tree rooted at W, check that rows in the | |
2838 | matrices of leaf window agree with their frame matrices about | |
2839 | glyph pointers. */ | |
2840 | ||
85fece3e | 2841 | static void |
59fc5cf9 | 2842 | check_window_matrix_pointers (struct window *w) |
5f5c8ee5 GM |
2843 | { |
2844 | while (w) | |
2845 | { | |
e74aeda8 DA |
2846 | if (WINDOWP (w->contents)) |
2847 | check_window_matrix_pointers (XWINDOW (w->contents)); | |
5f5c8ee5 | 2848 | else |
60a8948a | 2849 | { |
d3d50620 | 2850 | struct frame *f = XFRAME (w->frame); |
5f5c8ee5 GM |
2851 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); |
2852 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 2853 | } |
177c0ea7 | 2854 | |
d3d50620 | 2855 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2856 | } |
2857 | } | |
2858 | ||
2859 | ||
2860 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
2861 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
2862 | each row in WINDOW_MATRIX check that it's a slice of the | |
2863 | corresponding frame row. If it isn't, abort. */ | |
2864 | ||
2865 | static void | |
59fc5cf9 AS |
2866 | check_matrix_pointers (struct glyph_matrix *window_matrix, |
2867 | struct glyph_matrix *frame_matrix) | |
5f5c8ee5 GM |
2868 | { |
2869 | /* Row number in WINDOW_MATRIX. */ | |
2870 | int i = 0; | |
2871 | ||
2872 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
2873 | int j = window_matrix->matrix_y; | |
2874 | ||
177c0ea7 | 2875 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
2876 | slice of the row in the frame matrix. If it isn't we didn't |
2877 | mirror an operation on the frame matrix correctly. */ | |
2878 | while (i < window_matrix->nrows) | |
2879 | { | |
2880 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
2881 | frame_matrix->rows + j)) | |
1088b922 | 2882 | emacs_abort (); |
5f5c8ee5 GM |
2883 | ++i, ++j; |
2884 | } | |
2885 | } | |
2886 | ||
e509cfa6 | 2887 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
2888 | |
2889 | ||
2890 | \f | |
2891 | /********************************************************************** | |
2892 | VPOS and HPOS translations | |
2893 | **********************************************************************/ | |
2894 | ||
e509cfa6 | 2895 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
2896 | |
2897 | /* Translate vertical position VPOS which is relative to window W to a | |
2898 | vertical position relative to W's frame. */ | |
2899 | ||
2900 | static int | |
59fc5cf9 | 2901 | window_to_frame_vpos (struct window *w, int vpos) |
5f5c8ee5 | 2902 | { |
d3d50620 | 2903 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
a54e2c05 | 2904 | eassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); |
7df02016 | 2905 | vpos += WINDOW_TOP_EDGE_LINE (w); |
d3d50620 | 2906 | eassert (vpos >= 0 && vpos <= FRAME_LINES (XFRAME (w->frame))); |
5f5c8ee5 GM |
2907 | return vpos; |
2908 | } | |
2909 | ||
2910 | ||
2911 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 2912 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
2913 | |
2914 | static int | |
59fc5cf9 | 2915 | window_to_frame_hpos (struct window *w, int hpos) |
5f5c8ee5 | 2916 | { |
d3d50620 | 2917 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 2918 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
2919 | return hpos; |
2920 | } | |
177c0ea7 | 2921 | |
5f5c8ee5 GM |
2922 | #endif /* GLYPH_DEBUG */ |
2923 | ||
2924 | ||
2925 | \f | |
2926 | /********************************************************************** | |
2927 | Redrawing Frames | |
2928 | **********************************************************************/ | |
2929 | ||
2a14f83b | 2930 | /* Redraw frame F. */ |
5f5c8ee5 | 2931 | |
2a14f83b DA |
2932 | void |
2933 | redraw_frame (struct frame *f) | |
2934 | { | |
2935 | /* Error if F has no glyphs. */ | |
2936 | eassert (f->glyphs_initialized_p); | |
5f5c8ee5 | 2937 | update_begin (f); |
f2adda5e | 2938 | if (FRAME_MSDOS_P (f)) |
79d39b69 | 2939 | FRAME_TERMINAL (f)->set_terminal_modes_hook (FRAME_TERMINAL (f)); |
385ed61f | 2940 | clear_frame (f); |
5f5c8ee5 GM |
2941 | clear_current_matrices (f); |
2942 | update_end (f); | |
94ae2ad4 | 2943 | windows_or_buffers_changed = 13; |
5f5c8ee5 GM |
2944 | /* Mark all windows as inaccurate, so that every window will have |
2945 | its redisplay done. */ | |
2946 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
ecab13d4 | 2947 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), NULL, 1); |
5f5c8ee5 | 2948 | f->garbaged = 0; |
5f5c8ee5 GM |
2949 | } |
2950 | ||
2a14f83b DA |
2951 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 0, 1, 0, |
2952 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. | |
2953 | If FRAME is omitted or nil, the selected frame is used. */) | |
2954 | (Lisp_Object frame) | |
5f5c8ee5 | 2955 | { |
2a14f83b DA |
2956 | redraw_frame (decode_live_frame (frame)); |
2957 | return Qnil; | |
5f5c8ee5 GM |
2958 | } |
2959 | ||
5f5c8ee5 | 2960 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", |
7ee72033 | 2961 | doc: /* Clear and redisplay all visible frames. */) |
5842a27b | 2962 | (void) |
5f5c8ee5 GM |
2963 | { |
2964 | Lisp_Object tail, frame; | |
2965 | ||
2966 | FOR_EACH_FRAME (tail, frame) | |
2967 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
2a14f83b | 2968 | redraw_frame (XFRAME (frame)); |
5f5c8ee5 GM |
2969 | |
2970 | return Qnil; | |
2971 | } | |
2972 | ||
2973 | ||
5f5c8ee5 | 2974 | \f |
5f5c8ee5 GM |
2975 | /*********************************************************************** |
2976 | Frame Update | |
2977 | ***********************************************************************/ | |
4588ec20 | 2978 | |
5f5c8ee5 | 2979 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 2980 | |
59ea14cd PE |
2981 | If FORCE_P, don't let redisplay be stopped by detecting pending input. |
2982 | If INHIBIT_HAIRY_ID_P, don't try scrolling. | |
177c0ea7 | 2983 | |
59ea14cd | 2984 | Value is true if redisplay was stopped due to pending input. */ |
4588ec20 | 2985 | |
59ea14cd PE |
2986 | bool |
2987 | update_frame (struct frame *f, bool force_p, bool inhibit_hairy_id_p) | |
5f5c8ee5 | 2988 | { |
59ea14cd PE |
2989 | /* True means display has been paused because of pending input. */ |
2990 | bool paused_p; | |
e69b0960 | 2991 | struct window *root_window = XWINDOW (f->root_window); |
5f5c8ee5 | 2992 | |
a2130dbb KS |
2993 | if (redisplay_dont_pause) |
2994 | force_p = 1; | |
6fd326b7 | 2995 | else if (!force_p && detect_input_pending_ignore_squeezables ()) |
d012c62b | 2996 | { |
6fd326b7 DA |
2997 | paused_p = 1; |
2998 | goto do_pause; | |
d012c62b | 2999 | } |
d012c62b | 3000 | |
5f5c8ee5 | 3001 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3002 | { |
5f5c8ee5 GM |
3003 | /* We are working on window matrix basis. All windows whose |
3004 | flag must_be_updated_p is set have to be updated. */ | |
3005 | ||
3006 | /* Record that we are not working on frame matrices. */ | |
3007 | set_frame_matrix_frame (NULL); | |
3008 | ||
3009 | /* Update all windows in the window tree of F, maybe stopping | |
3010 | when pending input is detected. */ | |
3011 | update_begin (f); | |
3012 | ||
5a49b79c | 3013 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
3014 | /* Update the menu bar on X frames that don't have toolkit |
3015 | support. */ | |
e69b0960 DA |
3016 | if (WINDOWP (f->menu_bar_window)) |
3017 | update_window (XWINDOW (f->menu_bar_window), 1); | |
5a49b79c | 3018 | #endif |
5f5c8ee5 | 3019 | |
742516e0 | 3020 | #if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS) |
5f5c8ee5 | 3021 | /* Update the tool-bar window, if present. */ |
e69b0960 | 3022 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3023 | { |
e69b0960 | 3024 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3025 | |
3026 | /* Update tool-bar window. */ | |
3027 | if (w->must_be_updated_p) | |
4588ec20 | 3028 | { |
153a073c PJ |
3029 | Lisp_Object tem; |
3030 | ||
5f5c8ee5 GM |
3031 | update_window (w, 1); |
3032 | w->must_be_updated_p = 0; | |
3033 | ||
3034 | /* Swap tool-bar strings. We swap because we want to | |
3035 | reuse strings. */ | |
e69b0960 | 3036 | tem = f->current_tool_bar_string; |
f00af5b1 PE |
3037 | fset_current_tool_bar_string (f, f->desired_tool_bar_string); |
3038 | fset_desired_tool_bar_string (f, tem); | |
4588ec20 JB |
3039 | } |
3040 | } | |
742516e0 | 3041 | #endif |
5f5c8ee5 GM |
3042 | |
3043 | /* Update windows. */ | |
3044 | paused_p = update_window_tree (root_window, force_p); | |
3045 | update_end (f); | |
4588ec20 | 3046 | } |
5f5c8ee5 GM |
3047 | else |
3048 | { | |
3049 | /* We are working on frame matrix basis. Set the frame on whose | |
3050 | frame matrix we operate. */ | |
3051 | set_frame_matrix_frame (f); | |
3052 | ||
868dd24b | 3053 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3054 | build_frame_matrix (f); |
177c0ea7 | 3055 | |
868dd24b GM |
3056 | /* Update the display */ |
3057 | update_begin (f); | |
5f5c8ee5 | 3058 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3059 | update_end (f); |
3060 | ||
7d2f1216 | 3061 | if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f)) |
3224dac1 | 3062 | { |
0b0d3e0b KL |
3063 | if (FRAME_TTY (f)->termscript) |
3064 | fflush (FRAME_TTY (f)->termscript); | |
7d2f1216 EZ |
3065 | if (FRAME_TERMCAP_P (f)) |
3066 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3067 | } |
868dd24b | 3068 | |
5f5c8ee5 | 3069 | /* Check window matrices for lost pointers. */ |
e509cfa6 | 3070 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
3071 | check_window_matrix_pointers (root_window); |
3072 | add_frame_display_history (f, paused_p); | |
3073 | #endif | |
5f5c8ee5 GM |
3074 | } |
3075 | ||
993d4ab6 | 3076 | do_pause: |
5f5c8ee5 | 3077 | /* Reset flags indicating that a window should be updated. */ |
ecab13d4 | 3078 | set_window_update_flags (root_window, NULL, 0); |
177c0ea7 | 3079 | |
868dd24b | 3080 | display_completed = !paused_p; |
5f5c8ee5 | 3081 | return paused_p; |
4588ec20 | 3082 | } |
5f5c8ee5 | 3083 | |
b5e9cbb6 EZ |
3084 | /* Update a TTY frame F that has a menu dropped down over some of its |
3085 | glyphs. This is like the second part of update_frame, but it | |
3086 | doesn't call build_frame_matrix, because we already have the | |
3087 | desired matrix prepared, and don't want it to be overwritten by the | |
3088 | text of the normal display. */ | |
3089 | void | |
3090 | update_frame_with_menu (struct frame *f) | |
3091 | { | |
3092 | struct window *root_window = XWINDOW (f->root_window); | |
e7873136 | 3093 | bool paused_p; |
b5e9cbb6 | 3094 | |
e7873136 | 3095 | eassert (FRAME_TERMCAP_P (f)); |
b5e9cbb6 EZ |
3096 | |
3097 | /* We are working on frame matrix basis. Set the frame on whose | |
3098 | frame matrix we operate. */ | |
3099 | set_frame_matrix_frame (f); | |
3100 | ||
3101 | /* Update the display */ | |
3102 | update_begin (f); | |
141f1ff7 EZ |
3103 | /* Force update_frame_1 not to stop due to pending input, and not |
3104 | try scrolling. */ | |
b5e9cbb6 EZ |
3105 | paused_p = update_frame_1 (f, 1, 1); |
3106 | update_end (f); | |
3107 | ||
3108 | if (FRAME_TTY (f)->termscript) | |
3109 | fflush (FRAME_TTY (f)->termscript); | |
3110 | fflush (FRAME_TTY (f)->output); | |
3111 | /* Check window matrices for lost pointers. */ | |
3112 | #if GLYPH_DEBUG | |
ffc3882f EZ |
3113 | #if 0 |
3114 | /* We cannot possibly survive the matrix pointers check, since | |
3115 | we have overwritten parts of the frame glyph matrix without | |
3116 | making any updates to the window matrices. */ | |
b5e9cbb6 | 3117 | check_window_matrix_pointers (root_window); |
ffc3882f | 3118 | #endif |
b5e9cbb6 | 3119 | add_frame_display_history (f, paused_p); |
3b158d11 PE |
3120 | #else |
3121 | IF_LINT ((void) paused_p); | |
b5e9cbb6 EZ |
3122 | #endif |
3123 | ||
3124 | /* Reset flags indicating that a window should be updated. */ | |
4ed77415 | 3125 | set_window_update_flags (root_window, NULL, 0); |
b5e9cbb6 | 3126 | } |
5f5c8ee5 | 3127 | |
4588ec20 | 3128 | \f |
5f5c8ee5 GM |
3129 | /************************************************************************ |
3130 | Window-based updates | |
3131 | ************************************************************************/ | |
3132 | ||
59ea14cd PE |
3133 | /* Perform updates in window tree rooted at W. |
3134 | If FORCE_P, don't stop updating if input is pending. */ | |
5f5c8ee5 | 3135 | |
59ea14cd PE |
3136 | static bool |
3137 | update_window_tree (struct window *w, bool force_p) | |
5f5c8ee5 | 3138 | { |
59ea14cd | 3139 | bool paused_p = 0; |
177c0ea7 | 3140 | |
5f5c8ee5 GM |
3141 | while (w && !paused_p) |
3142 | { | |
e74aeda8 DA |
3143 | if (WINDOWP (w->contents)) |
3144 | paused_p |= update_window_tree (XWINDOW (w->contents), force_p); | |
5f5c8ee5 GM |
3145 | else if (w->must_be_updated_p) |
3146 | paused_p |= update_window (w, force_p); | |
3147 | ||
d3d50620 | 3148 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
3149 | } |
3150 | ||
3151 | return paused_p; | |
3152 | } | |
3153 | ||
3154 | ||
59ea14cd PE |
3155 | /* Update window W if its flag must_be_updated_p is set. |
3156 | If FORCE_P, don't stop updating if input is pending. */ | |
5f5c8ee5 GM |
3157 | |
3158 | void | |
59ea14cd | 3159 | update_single_window (struct window *w, bool force_p) |
5f5c8ee5 GM |
3160 | { |
3161 | if (w->must_be_updated_p) | |
3162 | { | |
3163 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
3164 | ||
3165 | /* Record that this is not a frame-based redisplay. */ | |
3166 | set_frame_matrix_frame (NULL); | |
3167 | ||
a2130dbb KS |
3168 | if (redisplay_dont_pause) |
3169 | force_p = 1; | |
d012c62b | 3170 | |
5f5c8ee5 GM |
3171 | /* Update W. */ |
3172 | update_begin (f); | |
3173 | update_window (w, force_p); | |
3174 | update_end (f); | |
4588ec20 | 3175 | |
5f5c8ee5 GM |
3176 | /* Reset flag in W. */ |
3177 | w->must_be_updated_p = 0; | |
3178 | } | |
3179 | } | |
4588ec20 | 3180 | |
93e023fc | 3181 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 3182 | |
408f5064 GM |
3183 | /* Redraw lines from the current matrix of window W that are |
3184 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
3185 | ||
3186 | static void | |
971de7fb | 3187 | redraw_overlapped_rows (struct window *w, int yb) |
408f5064 | 3188 | { |
d8ee7803 | 3189 | int i; |
fa971ac3 | 3190 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3fc809e2 | 3191 | |
408f5064 GM |
3192 | /* If rows overlapping others have been changed, the rows being |
3193 | overlapped have to be redrawn. This won't draw lines that have | |
3194 | already been drawn in update_window_line because overlapped_p in | |
3195 | desired rows is 0, so after row assignment overlapped_p in | |
3196 | current rows is 0. */ | |
3197 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
3198 | { | |
e876ff42 | 3199 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
3200 | |
3201 | if (!row->enabled_p) | |
3202 | break; | |
3203 | else if (row->mode_line_p) | |
3204 | continue; | |
177c0ea7 | 3205 | |
408f5064 GM |
3206 | if (row->overlapped_p) |
3207 | { | |
3208 | enum glyph_row_area area; | |
177c0ea7 | 3209 | |
408f5064 GM |
3210 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
3211 | { | |
f60e429a DA |
3212 | output_cursor_to (w, i, 0, row->y, |
3213 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 3214 | if (row->used[area]) |
7f780da6 DA |
3215 | FRAME_RIF (f)->write_glyphs (w, row, row->glyphs[area], |
3216 | area, row->used[area]); | |
3217 | FRAME_RIF (f)->clear_end_of_line (w, row, area, -1); | |
408f5064 | 3218 | } |
177c0ea7 | 3219 | |
408f5064 GM |
3220 | row->overlapped_p = 0; |
3221 | } | |
3222 | ||
e876ff42 | 3223 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
3224 | break; |
3225 | } | |
3226 | } | |
3227 | ||
3228 | ||
3229 | /* Redraw lines from the current matrix of window W that overlap | |
3230 | others. YB is bottom-most y-position in W. */ | |
3231 | ||
3232 | static void | |
971de7fb | 3233 | redraw_overlapping_rows (struct window *w, int yb) |
408f5064 GM |
3234 | { |
3235 | int i, bottom_y; | |
3236 | struct glyph_row *row; | |
fa971ac3 | 3237 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
3fc809e2 | 3238 | |
408f5064 GM |
3239 | for (i = 0; i < w->current_matrix->nrows; ++i) |
3240 | { | |
3241 | row = w->current_matrix->rows + i; | |
3242 | ||
3243 | if (!row->enabled_p) | |
3244 | break; | |
3245 | else if (row->mode_line_p) | |
3246 | continue; | |
177c0ea7 | 3247 | |
408f5064 GM |
3248 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
3249 | ||
b4b2c2ca | 3250 | if (row->overlapping_p) |
408f5064 | 3251 | { |
41124e06 YM |
3252 | int overlaps = 0; |
3253 | ||
b4b2c2ca | 3254 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) && i > 0 |
41124e06 YM |
3255 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) |
3256 | overlaps |= OVERLAPS_PRED; | |
b4b2c2ca | 3257 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) && bottom_y < yb |
41124e06 YM |
3258 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) |
3259 | overlaps |= OVERLAPS_SUCC; | |
3260 | ||
3261 | if (overlaps) | |
3262 | { | |
3263 | if (row->used[LEFT_MARGIN_AREA]) | |
3264 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
3265 | ||
3266 | if (row->used[TEXT_AREA]) | |
3267 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
3268 | ||
3269 | if (row->used[RIGHT_MARGIN_AREA]) | |
3270 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
3271 | ||
c5e87d10 | 3272 | /* Record in neighbor rows that ROW overwrites part of |
41124e06 YM |
3273 | their display. */ |
3274 | if (overlaps & OVERLAPS_PRED) | |
3275 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
3276 | if (overlaps & OVERLAPS_SUCC) | |
3277 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
3278 | } | |
408f5064 GM |
3279 | } |
3280 | ||
3281 | if (bottom_y >= yb) | |
3282 | break; | |
3283 | } | |
3284 | } | |
3285 | ||
93e023fc KS |
3286 | #endif /* HAVE_WINDOW_SYSTEM */ |
3287 | ||
408f5064 | 3288 | |
09ad5a91 | 3289 | #if defined GLYPH_DEBUG && 0 |
93962bfa GM |
3290 | |
3291 | /* Check that no row in the current matrix of window W is enabled | |
3292 | which is below what's displayed in the window. */ | |
3293 | ||
09ad5a91 | 3294 | static void |
971de7fb | 3295 | check_current_matrix_flags (struct window *w) |
93962bfa | 3296 | { |
59ea14cd | 3297 | bool last_seen_p = 0; |
93962bfa GM |
3298 | int i, yb = window_text_bottom_y (w); |
3299 | ||
3300 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
3301 | { | |
3302 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
3303 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3304 | last_seen_p = 1; | |
3305 | else if (last_seen_p && row->enabled_p) | |
1088b922 | 3306 | emacs_abort (); |
93962bfa GM |
3307 | } |
3308 | } | |
3309 | ||
3310 | #endif /* GLYPH_DEBUG */ | |
3311 | ||
3312 | ||
59ea14cd PE |
3313 | /* Update display of window W. |
3314 | If FORCE_P, don't stop updating when input is pending. */ | |
5f5c8ee5 | 3315 | |
59ea14cd PE |
3316 | static bool |
3317 | update_window (struct window *w, bool force_p) | |
4588ec20 | 3318 | { |
5f5c8ee5 | 3319 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
59ea14cd | 3320 | bool paused_p; |
5f5c8ee5 | 3321 | int preempt_count = baud_rate / 2400 + 1; |
597cfb3f | 3322 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
e509cfa6 | 3323 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 3324 | /* Check that W's frame doesn't have glyph matrices. */ |
a54e2c05 | 3325 | eassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 3326 | #endif |
5f5c8ee5 GM |
3327 | |
3328 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb | 3329 | if (!force_p) |
a2d5fca0 | 3330 | detect_input_pending_ignore_squeezables (); |
4588ec20 | 3331 | |
5f5c8ee5 GM |
3332 | /* If forced to complete the update, or if no input is pending, do |
3333 | the update. */ | |
8fd9a666 | 3334 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 3335 | { |
5f5c8ee5 GM |
3336 | struct glyph_row *row, *end; |
3337 | struct glyph_row *mode_line_row; | |
56974e03 | 3338 | struct glyph_row *header_line_row; |
59ea14cd PE |
3339 | int yb; |
3340 | bool changed_p = 0, mouse_face_overwritten_p = 0; | |
0bc32927 | 3341 | int n_updated = 0; |
5f5c8ee5 GM |
3342 | |
3343 | rif->update_window_begin_hook (w); | |
3344 | yb = window_text_bottom_y (w); | |
138c0ae8 EZ |
3345 | row = MATRIX_ROW (desired_matrix, 0); |
3346 | end = MATRIX_MODE_LINE_ROW (desired_matrix); | |
177c0ea7 | 3347 | |
394305db EZ |
3348 | /* Take note of the header line, if there is one. We will |
3349 | update it below, after updating all of the window's lines. */ | |
5f5c8ee5 | 3350 | if (row->mode_line_p) |
56974e03 GM |
3351 | { |
3352 | header_line_row = row; | |
3353 | ++row; | |
3354 | } | |
3355 | else | |
3356 | header_line_row = NULL; | |
5f5c8ee5 GM |
3357 | |
3358 | /* Update the mode line, if necessary. */ | |
3359 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
3360 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
3361 | { | |
3362 | mode_line_row->y = yb; | |
3363 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
3364 | desired_matrix), |
3365 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3366 | } |
3367 | ||
3368 | /* Find first enabled row. Optimizations in redisplay_internal | |
3369 | may lead to an update with only one row enabled. There may | |
3370 | be also completely empty matrices. */ | |
3371 | while (row < end && !row->enabled_p) | |
3372 | ++row; | |
177c0ea7 | 3373 | |
bfdcafe1 | 3374 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 3375 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
3376 | { |
3377 | int rc = scrolling_window (w, header_line_row != NULL); | |
3378 | if (rc < 0) | |
3379 | { | |
3380 | /* All rows were found to be equal. */ | |
3381 | paused_p = 0; | |
3382 | goto set_cursor; | |
3383 | } | |
3384 | else if (rc > 0) | |
6b61353c KH |
3385 | { |
3386 | /* We've scrolled the display. */ | |
3387 | force_p = 1; | |
3388 | changed_p = 1; | |
3389 | } | |
5f5c8ee5 GM |
3390 | } |
3391 | ||
3392 | /* Update the rest of the lines. */ | |
0bc32927 | 3393 | for (; row < end && (force_p || !input_pending); ++row) |
394305db EZ |
3394 | /* scrolling_window resets the enabled_p flag of the rows it |
3395 | reuses from current_matrix. */ | |
b7412313 | 3396 | if (row->enabled_p) |
5f5c8ee5 GM |
3397 | { |
3398 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
3399 | int i; | |
177c0ea7 | 3400 | |
153a073c | 3401 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
3402 | detect_input_pending. If it's done too often, |
3403 | scrolling large windows with repeated scroll-up | |
3404 | commands will too quickly pause redisplay. */ | |
e87b8809 | 3405 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 3406 | detect_input_pending_ignore_squeezables (); |
e876ff42 GM |
3407 | changed_p |= update_window_line (w, vpos, |
3408 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3409 | |
3410 | /* Mark all rows below the last visible one in the current | |
3411 | matrix as invalid. This is necessary because of | |
3412 | variable line heights. Consider the case of three | |
3413 | successive redisplays, where the first displays 5 | |
3414 | lines, the second 3 lines, and the third 5 lines again. | |
3415 | If the second redisplay wouldn't mark rows in the | |
3416 | current matrix invalid, the third redisplay might be | |
3417 | tempted to optimize redisplay based on lines displayed | |
3418 | in the first redisplay. */ | |
3419 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3420 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
3421 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
3422 | } | |
3423 | ||
3424 | /* Was display preempted? */ | |
3425 | paused_p = row < end; | |
177c0ea7 | 3426 | |
56974e03 | 3427 | set_cursor: |
177c0ea7 | 3428 | |
6b61353c KH |
3429 | /* Update the header line after scrolling because a new header |
3430 | line would otherwise overwrite lines at the top of the window | |
3431 | that can be scrolled. */ | |
3432 | if (header_line_row && header_line_row->enabled_p) | |
3433 | { | |
3434 | header_line_row->y = 0; | |
3435 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
6b61353c KH |
3436 | } |
3437 | ||
153a073c | 3438 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
3439 | if (!paused_p && !w->pseudo_window_p) |
3440 | { | |
93e023fc | 3441 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
3442 | if (changed_p && rif->fix_overlapping_area) |
3443 | { | |
3444 | redraw_overlapped_rows (w, yb); | |
3445 | redraw_overlapping_rows (w, yb); | |
3446 | } | |
93e023fc | 3447 | #endif |
177c0ea7 | 3448 | |
5f5c8ee5 GM |
3449 | /* Make cursor visible at cursor position of W. */ |
3450 | set_window_cursor_after_update (w); | |
3451 | ||
e876ff42 GM |
3452 | #if 0 /* Check that current matrix invariants are satisfied. This is |
3453 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
3454 | IF_DEBUG (check_matrix_invariants (w)); |
3455 | #endif | |
4588ec20 | 3456 | } |
5f5c8ee5 | 3457 | |
e509cfa6 | 3458 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
3459 | /* Remember the redisplay method used to display the matrix. */ |
3460 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
3461 | #endif | |
408f5064 | 3462 | |
6b61353c KH |
3463 | #ifdef HAVE_WINDOW_SYSTEM |
3464 | update_window_fringes (w, 0); | |
3465 | #endif | |
3466 | ||
56974e03 GM |
3467 | /* End the update of window W. Don't set the cursor if we |
3468 | paused updating the display because in this case, | |
3469 | set_window_cursor_after_update hasn't been called, and | |
f60e429a | 3470 | W->output_cursor doesn't contain the cursor location. */ |
56974e03 | 3471 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); |
4588ec20 | 3472 | } |
5f5c8ee5 GM |
3473 | else |
3474 | paused_p = 1; | |
3475 | ||
e509cfa6 | 3476 | #ifdef GLYPH_DEBUG |
0cffd9d8 | 3477 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
3478 | add_window_display_history (w, w->current_matrix->method, paused_p); |
3479 | #endif | |
177c0ea7 | 3480 | |
5f5c8ee5 | 3481 | clear_glyph_matrix (desired_matrix); |
408f5064 | 3482 | |
5f5c8ee5 | 3483 | return paused_p; |
4588ec20 JB |
3484 | } |
3485 | ||
b64b3980 | 3486 | |
5f5c8ee5 GM |
3487 | /* Update the display of area AREA in window W, row number VPOS. |
3488 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
3489 | ||
3490 | static void | |
7f780da6 DA |
3491 | update_marginal_area (struct window *w, struct glyph_row *updated_row, |
3492 | enum glyph_row_area area, int vpos) | |
b64b3980 | 3493 | { |
5f5c8ee5 | 3494 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 3495 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 | 3496 | |
5f5c8ee5 GM |
3497 | /* Set cursor to start of glyphs, write them, and clear to the end |
3498 | of the area. I don't think that something more sophisticated is | |
3499 | necessary here, since marginal areas will not be the default. */ | |
f60e429a | 3500 | output_cursor_to (w, vpos, 0, desired_row->y, 0); |
5f5c8ee5 | 3501 | if (desired_row->used[area]) |
7f780da6 DA |
3502 | rif->write_glyphs (w, updated_row, desired_row->glyphs[area], |
3503 | area, desired_row->used[area]); | |
3504 | rif->clear_end_of_line (w, updated_row, area, -1); | |
b64b3980 | 3505 | } |
23b0200c | 3506 | |
352f1545 | 3507 | |
408f5064 | 3508 | /* Update the display of the text area of row VPOS in window W. |
59ea14cd | 3509 | Value is true if display has changed. */ |
5f5c8ee5 | 3510 | |
59ea14cd | 3511 | static bool |
7f780da6 | 3512 | update_text_area (struct window *w, struct glyph_row *updated_row, int vpos) |
23b0200c | 3513 | { |
5f5c8ee5 GM |
3514 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
3515 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3516 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
59ea14cd | 3517 | bool changed_p = 0; |
5f5c8ee5 | 3518 | |
5f5c8ee5 GM |
3519 | /* If rows are at different X or Y, or rows have different height, |
3520 | or the current row is marked invalid, write the entire line. */ | |
3521 | if (!current_row->enabled_p | |
3522 | || desired_row->y != current_row->y | |
3523 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
3524 | || desired_row->phys_ascent != current_row->phys_ascent |
3525 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 3526 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 3527 | || current_row->overlapped_p |
fee8b690 CY |
3528 | /* This next line is necessary for correctly redrawing |
3529 | mouse-face areas after scrolling and other operations. | |
3530 | However, it causes excessive flickering when mouse is moved | |
3531 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
3532 | line doesn't seem to hurt anything. -- cyd. |
3533 | But it is still needed for the header line. -- kfs. */ | |
3534 | || (current_row->mouse_face_p | |
3535 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
3536 | || current_row->x != desired_row->x) |
3537 | { | |
f60e429a | 3538 | output_cursor_to (w, vpos, 0, desired_row->y, desired_row->x); |
177c0ea7 | 3539 | |
5f5c8ee5 | 3540 | if (desired_row->used[TEXT_AREA]) |
7f780da6 DA |
3541 | rif->write_glyphs (w, updated_row, desired_row->glyphs[TEXT_AREA], |
3542 | TEXT_AREA, desired_row->used[TEXT_AREA]); | |
177c0ea7 | 3543 | |
5f5c8ee5 | 3544 | /* Clear to end of window. */ |
7f780da6 | 3545 | rif->clear_end_of_line (w, updated_row, TEXT_AREA, -1); |
408f5064 | 3546 | changed_p = 1; |
60f2f3f1 GM |
3547 | |
3548 | /* This erases the cursor. We do this here because | |
3549 | notice_overwritten_cursor cannot easily check this, which | |
3550 | might indicate that the whole functionality of | |
3551 | notice_overwritten_cursor would better be implemented here. | |
3552 | On the other hand, we need notice_overwritten_cursor as long | |
3553 | as mouse highlighting is done asynchronously outside of | |
3554 | redisplay. */ | |
3555 | if (vpos == w->phys_cursor.vpos) | |
3556 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
3557 | } |
3558 | else | |
3559 | { | |
3560 | int stop, i, x; | |
3561 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
3562 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
59ea14cd | 3563 | bool overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 3564 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
59ea14cd | 3565 | bool abort_skipping = 0; |
5f5c8ee5 | 3566 | |
78897758 YM |
3567 | /* If the desired row extends its face to the text area end, and |
3568 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
3569 | make sure we write at least one glyph, so that the face |
3570 | extension actually takes place. */ | |
78897758 YM |
3571 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
3572 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
3573 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
3574 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 3575 | --desired_stop_pos; |
177c0ea7 | 3576 | |
5f5c8ee5 GM |
3577 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
3578 | i = 0; | |
3579 | x = desired_row->x; | |
8399f8a0 GM |
3580 | |
3581 | /* Loop over glyphs that current and desired row may have | |
3582 | in common. */ | |
5f5c8ee5 | 3583 | while (i < stop) |
352f1545 | 3584 | { |
59ea14cd | 3585 | bool can_skip_p = !abort_skipping; |
177c0ea7 | 3586 | |
5f5c8ee5 | 3587 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
3588 | don't have to be written. We can't skip if the last |
3589 | current glyph overlaps the glyph to its right. For | |
3590 | example, consider a current row of `if ' with the `f' in | |
3591 | Courier bold so that it overlaps the ` ' to its right. | |
3592 | If the desired row is ` ', we would skip over the space | |
3593 | after the `if' and there would remain a pixel from the | |
3594 | `f' on the screen. */ | |
3595 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 3596 | { |
e47306e6 GM |
3597 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
3598 | int left, right; | |
177c0ea7 | 3599 | |
d3d50620 | 3600 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
e47306e6 | 3601 | &left, &right); |
91d227d9 | 3602 | can_skip_p = (right == 0 && !abort_skipping); |
352f1545 | 3603 | } |
177c0ea7 | 3604 | |
6d950f4c | 3605 | if (can_skip_p) |
352f1545 | 3606 | { |
91d227d9 CY |
3607 | int start_hpos = i; |
3608 | ||
6d950f4c GM |
3609 | while (i < stop |
3610 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
3611 | { | |
3612 | x += desired_glyph->pixel_width; | |
3613 | ++desired_glyph, ++current_glyph, ++i; | |
3614 | } | |
3615 | ||
3616 | /* Consider the case that the current row contains "xxx | |
3617 | ppp ggg" in italic Courier font, and the desired row | |
3618 | is "xxx ggg". The character `p' has lbearing, `g' | |
3619 | has not. The loop above will stop in front of the | |
3620 | first `p' in the current row. If we would start | |
3621 | writing glyphs there, we wouldn't erase the lbearing | |
3622 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 3623 | taken care of by draw_glyphs. */ |
6d950f4c GM |
3624 | if (overlapping_glyphs_p |
3625 | && i > 0 | |
3626 | && i < current_row->used[TEXT_AREA] | |
3627 | && (current_row->used[TEXT_AREA] | |
3628 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 3629 | { |
6d950f4c | 3630 | int left, right; |
177c0ea7 | 3631 | |
3a45383a | 3632 | rif->get_glyph_overhangs (current_glyph, |
d3d50620 | 3633 | XFRAME (w->frame), |
6d950f4c GM |
3634 | &left, &right); |
3635 | while (left > 0 && i > 0) | |
3636 | { | |
3637 | --i, --desired_glyph, --current_glyph; | |
3638 | x -= desired_glyph->pixel_width; | |
3639 | left -= desired_glyph->pixel_width; | |
3640 | } | |
91d227d9 CY |
3641 | |
3642 | /* Abort the skipping algorithm if we end up before | |
3643 | our starting point, to avoid looping (bug#1070). | |
3644 | This can happen when the lbearing is larger than | |
3645 | the pixel width. */ | |
3646 | abort_skipping = (i < start_hpos); | |
5f5c8ee5 | 3647 | } |
352f1545 | 3648 | } |
177c0ea7 | 3649 | |
5f5c8ee5 GM |
3650 | /* Try to avoid writing the entire rest of the desired row |
3651 | by looking for a resync point. This mainly prevents | |
3652 | mode line flickering in the case the mode line is in | |
3653 | fixed-pitch font, which it usually will be. */ | |
3654 | if (i < desired_row->used[TEXT_AREA]) | |
3655 | { | |
3656 | int start_x = x, start_hpos = i; | |
3657 | struct glyph *start = desired_glyph; | |
3658 | int current_x = x; | |
59ea14cd | 3659 | bool skip_first_p = !can_skip_p; |
6d950f4c | 3660 | |
5f5c8ee5 GM |
3661 | /* Find the next glyph that's equal again. */ |
3662 | while (i < stop | |
6d950f4c GM |
3663 | && (skip_first_p |
3664 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
3665 | && x == current_x) |
3666 | { | |
3667 | x += desired_glyph->pixel_width; | |
3668 | current_x += current_glyph->pixel_width; | |
3669 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 3670 | skip_first_p = 0; |
5f5c8ee5 | 3671 | } |
23b0200c | 3672 | |
5f5c8ee5 GM |
3673 | if (i == start_hpos || x != current_x) |
3674 | { | |
3675 | i = start_hpos; | |
3676 | x = start_x; | |
3677 | desired_glyph = start; | |
3678 | break; | |
3679 | } | |
e47306e6 | 3680 | |
f60e429a | 3681 | output_cursor_to (w, vpos, start_hpos, desired_row->y, start_x); |
7f780da6 DA |
3682 | rif->write_glyphs (w, updated_row, start, |
3683 | TEXT_AREA, i - start_hpos); | |
408f5064 | 3684 | changed_p = 1; |
5f5c8ee5 GM |
3685 | } |
3686 | } | |
177c0ea7 | 3687 | |
5f5c8ee5 GM |
3688 | /* Write the rest. */ |
3689 | if (i < desired_row->used[TEXT_AREA]) | |
3690 | { | |
f60e429a | 3691 | output_cursor_to (w, vpos, i, desired_row->y, x); |
7f780da6 DA |
3692 | rif->write_glyphs (w, updated_row, desired_glyph, |
3693 | TEXT_AREA, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 3694 | changed_p = 1; |
5f5c8ee5 | 3695 | } |
177c0ea7 | 3696 | |
5f5c8ee5 GM |
3697 | /* Maybe clear to end of line. */ |
3698 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
3699 | { | |
3700 | /* If new row extends to the end of the text area, nothing | |
3701 | has to be cleared, if and only if we did a write_glyphs | |
3702 | above. This is made sure by setting desired_stop_pos | |
3703 | appropriately above. */ | |
a54e2c05 | 3704 | eassert (i < desired_row->used[TEXT_AREA] |
78897758 YM |
3705 | || ((desired_row->used[TEXT_AREA] |
3706 | == current_row->used[TEXT_AREA]) | |
3707 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
3708 | } |
3709 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
3710 | { | |
3711 | /* If old row extends to the end of the text area, clear. */ | |
3712 | if (i >= desired_row->used[TEXT_AREA]) | |
f60e429a DA |
3713 | output_cursor_to (w, vpos, i, desired_row->y, |
3714 | desired_row->pixel_width); | |
7f780da6 | 3715 | rif->clear_end_of_line (w, updated_row, TEXT_AREA, -1); |
408f5064 | 3716 | changed_p = 1; |
5f5c8ee5 GM |
3717 | } |
3718 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 3719 | { |
5f5c8ee5 GM |
3720 | /* Otherwise clear to the end of the old row. Everything |
3721 | after that position should be clear already. */ | |
27786b2f | 3722 | int xlim; |
177c0ea7 | 3723 | |
5f5c8ee5 | 3724 | if (i >= desired_row->used[TEXT_AREA]) |
f60e429a DA |
3725 | output_cursor_to (w, vpos, i, desired_row->y, |
3726 | desired_row->pixel_width); | |
5f5c8ee5 GM |
3727 | |
3728 | /* If cursor is displayed at the end of the line, make sure | |
3729 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
3730 | with which to erase the cursor (because this method | |
3731 | doesn't work with lbearing/rbearing), so we must do it | |
3732 | this way. */ | |
3733 | if (vpos == w->phys_cursor.vpos | |
f951a506 EZ |
3734 | && (desired_row->reversed_p |
3735 | ? (w->phys_cursor.hpos < 0) | |
3736 | : (w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]))) | |
5f5c8ee5 GM |
3737 | { |
3738 | w->phys_cursor_on_p = 0; | |
27786b2f | 3739 | xlim = -1; |
5f5c8ee5 GM |
3740 | } |
3741 | else | |
27786b2f | 3742 | xlim = current_row->pixel_width; |
7f780da6 | 3743 | rif->clear_end_of_line (w, updated_row, TEXT_AREA, xlim); |
408f5064 | 3744 | changed_p = 1; |
2e8907d3 | 3745 | } |
23b0200c | 3746 | } |
408f5064 GM |
3747 | |
3748 | return changed_p; | |
23b0200c | 3749 | } |
4588ec20 | 3750 | |
5f5c8ee5 | 3751 | |
59ea14cd | 3752 | /* Update row VPOS in window W. Value is true if display has been changed. */ |
5f5c8ee5 | 3753 | |
59ea14cd PE |
3754 | static bool |
3755 | update_window_line (struct window *w, int vpos, bool *mouse_face_overwritten_p) | |
5f5c8ee5 GM |
3756 | { |
3757 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
3758 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3759 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
59ea14cd | 3760 | bool changed_p = 0; |
5f5c8ee5 | 3761 | |
177c0ea7 JB |
3762 | /* A row can be completely invisible in case a desired matrix was |
3763 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
3764 | the matrix. Make sure to make such rows current anyway, since |
3765 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
3766 | if (desired_row->mode_line_p |
3767 | || desired_row->visible_height > 0) | |
408f5064 | 3768 | { |
a54e2c05 | 3769 | eassert (desired_row->enabled_p); |
504805ac GM |
3770 | |
3771 | /* Update display of the left margin area, if there is one. */ | |
eeaf9bf3 | 3772 | if (!desired_row->full_width_p && w->left_margin_cols > 0) |
504805ac GM |
3773 | { |
3774 | changed_p = 1; | |
7f780da6 | 3775 | update_marginal_area (w, desired_row, LEFT_MARGIN_AREA, vpos); |
e9957956 EZ |
3776 | /* Setting this flag will ensure the vertical border, if |
3777 | any, between this window and the one on its left will be | |
3778 | redrawn. This is necessary because updating the left | |
3779 | margin area can potentially draw over the border. */ | |
3780 | current_row->redraw_fringe_bitmaps_p = 1; | |
504805ac | 3781 | } |
177c0ea7 | 3782 | |
504805ac | 3783 | /* Update the display of the text area. */ |
7f780da6 | 3784 | if (update_text_area (w, desired_row, vpos)) |
504805ac GM |
3785 | { |
3786 | changed_p = 1; | |
3787 | if (current_row->mouse_face_p) | |
3788 | *mouse_face_overwritten_p = 1; | |
3789 | } | |
177c0ea7 | 3790 | |
504805ac | 3791 | /* Update display of the right margin area, if there is one. */ |
eeaf9bf3 | 3792 | if (!desired_row->full_width_p && w->right_margin_cols > 0) |
504805ac GM |
3793 | { |
3794 | changed_p = 1; | |
7f780da6 | 3795 | update_marginal_area (w, desired_row, RIGHT_MARGIN_AREA, vpos); |
504805ac | 3796 | } |
177c0ea7 | 3797 | |
504805ac GM |
3798 | /* Draw truncation marks etc. */ |
3799 | if (!current_row->enabled_p | |
3800 | || desired_row->y != current_row->y | |
3801 | || desired_row->visible_height != current_row->visible_height | |
6b61353c | 3802 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 3803 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
6b61353c | 3804 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 3805 | || desired_row->mode_line_p != current_row->mode_line_p |
6b61353c | 3806 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
3807 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
3808 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
65620264 | 3809 | rif->after_update_window_line_hook (w, desired_row); |
408f5064 | 3810 | } |
177c0ea7 | 3811 | |
5f5c8ee5 GM |
3812 | /* Update current_row from desired_row. */ |
3813 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
408f5064 | 3814 | return changed_p; |
5f5c8ee5 GM |
3815 | } |
3816 | ||
3817 | ||
3818 | /* Set the cursor after an update of window W. This function may only | |
3819 | be called from update_window. */ | |
3820 | ||
3821 | static void | |
971de7fb | 3822 | set_window_cursor_after_update (struct window *w) |
4588ec20 | 3823 | { |
d3d50620 | 3824 | struct frame *f = XFRAME (w->frame); |
5f5c8ee5 GM |
3825 | int cx, cy, vpos, hpos; |
3826 | ||
3827 | /* Not intended for frame matrix updates. */ | |
a54e2c05 | 3828 | eassert (FRAME_WINDOW_P (f)); |
177c0ea7 | 3829 | |
b96fd3e8 GM |
3830 | if (cursor_in_echo_area |
3831 | && !NILP (echo_area_buffer[0]) | |
3832 | /* If we are showing a message instead of the mini-buffer, | |
3833 | show the cursor for the message instead. */ | |
3834 | && XWINDOW (minibuf_window) == w | |
3835 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
3836 | /* These cases apply only to the frame that contains |
3837 | the active mini-buffer window. */ | |
3838 | && FRAME_HAS_MINIBUF_P (f) | |
3839 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
3840 | { | |
3841 | cx = cy = vpos = hpos = 0; | |
3842 | ||
3843 | if (cursor_in_echo_area >= 0) | |
3844 | { | |
3845 | /* If the mini-buffer is several lines high, find the last | |
3846 | line that has any text on it. Note: either all lines | |
3847 | are enabled or none. Otherwise we wouldn't be able to | |
3848 | determine Y. */ | |
862b4790 GM |
3849 | struct glyph_row *row, *last_row; |
3850 | struct glyph *glyph; | |
3851 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 3852 | |
862b4790 | 3853 | last_row = NULL; |
6206f8ce GM |
3854 | row = w->current_matrix->rows; |
3855 | while (row->enabled_p | |
3856 | && (last_row == NULL | |
3857 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 3858 | { |
862b4790 GM |
3859 | if (row->used[TEXT_AREA] |
3860 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
3861 | last_row = row; | |
6206f8ce | 3862 | ++row; |
862b4790 | 3863 | } |
177c0ea7 | 3864 | |
5f5c8ee5 GM |
3865 | if (last_row) |
3866 | { | |
6206f8ce GM |
3867 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
3868 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 3869 | |
b96fd3e8 | 3870 | while (last > start && last->charpos < 0) |
862b4790 | 3871 | --last; |
177c0ea7 | 3872 | |
862b4790 GM |
3873 | for (glyph = start; glyph < last; ++glyph) |
3874 | { | |
3875 | cx += glyph->pixel_width; | |
3876 | ++hpos; | |
3877 | } | |
3878 | ||
5f5c8ee5 | 3879 | cy = last_row->y; |
862b4790 | 3880 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
3881 | } |
3882 | } | |
3883 | } | |
3884 | else | |
3885 | { | |
3886 | cx = w->cursor.x; | |
3887 | cy = w->cursor.y; | |
3888 | hpos = w->cursor.hpos; | |
3889 | vpos = w->cursor.vpos; | |
3890 | } | |
4588ec20 | 3891 | |
2dd61a9b | 3892 | /* Window cursor can be out of sync for horizontally split windows. |
cccaebd2 | 3893 | Horizontal position is -1 when cursor is on the left fringe. */ |
2dd61a9b DA |
3894 | hpos = clip_to_bounds (-1, hpos, w->current_matrix->matrix_w - 1); |
3895 | vpos = clip_to_bounds (0, vpos, w->current_matrix->nrows - 1); | |
f60e429a | 3896 | output_cursor_to (w, vpos, hpos, cy, cx); |
4588ec20 | 3897 | } |
4588ec20 | 3898 | |
5f5c8ee5 | 3899 | |
ecab13d4 DA |
3900 | /* If B is NULL, set WINDOW->must_be_updated_p to ON_P for all windows in |
3901 | the window tree rooted at W. Otherwise set WINDOW->must_be_updated_p | |
3902 | to ON_P only for windows that displays B. */ | |
6df5d75f GM |
3903 | |
3904 | void | |
ecab13d4 | 3905 | set_window_update_flags (struct window *w, struct buffer *b, bool on_p) |
6df5d75f GM |
3906 | { |
3907 | while (w) | |
3908 | { | |
e74aeda8 | 3909 | if (WINDOWP (w->contents)) |
ecab13d4 DA |
3910 | set_window_update_flags (XWINDOW (w->contents), b, on_p); |
3911 | else if (!(b && b != XBUFFER (w->contents))) | |
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 | } |