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 *); | |
880e6158 | 75 | static void change_frame_size_1 (struct frame *, int, int, bool, bool, bool, bool); |
d311d28c | 76 | static void increment_row_positions (struct glyph_row *, ptrdiff_t, ptrdiff_t); |
f57e2426 J |
77 | static void build_frame_matrix_from_window_tree (struct glyph_matrix *, |
78 | struct window *); | |
79 | static void build_frame_matrix_from_leaf_window (struct glyph_matrix *, | |
80 | struct window *); | |
f57e2426 J |
81 | static void adjust_decode_mode_spec_buffer (struct frame *); |
82 | static void fill_up_glyph_row_with_spaces (struct glyph_row *); | |
59ea14cd | 83 | static void clear_window_matrices (struct window *, bool); |
f57e2426 | 84 | static void fill_up_glyph_row_area_with_spaces (struct glyph_row *, int); |
59ea14cd PE |
85 | static int scrolling_window (struct window *, bool); |
86 | static bool update_window_line (struct window *, int, bool *); | |
f57e2426 | 87 | static void mirror_make_current (struct window *, int); |
e509cfa6 | 88 | #ifdef GLYPH_DEBUG |
f57e2426 J |
89 | static void check_matrix_pointers (struct glyph_matrix *, |
90 | struct glyph_matrix *); | |
b96fd3e8 | 91 | #endif |
f57e2426 | 92 | static void mirror_line_dance (struct window *, int, int, int *, char *); |
59ea14cd PE |
93 | static bool update_window_tree (struct window *, bool); |
94 | static bool update_window (struct window *, bool); | |
95 | static bool update_frame_1 (struct frame *, bool, bool); | |
96 | static bool scrolling (struct frame *); | |
f57e2426 | 97 | static void set_window_cursor_after_update (struct window *); |
f57e2426 J |
98 | static void adjust_frame_glyphs_for_window_redisplay (struct frame *); |
99 | static void adjust_frame_glyphs_for_frame_redisplay (struct frame *); | |
44ad1cf7 | 100 | static void set_window_update_flags (struct window *w, bool on_p); |
5f5c8ee5 | 101 | |
59ea14cd | 102 | /* True means last display completed. False means it was preempted. */ |
4588ec20 | 103 | |
59ea14cd | 104 | bool display_completed; |
4588ec20 | 105 | |
e7067d00 | 106 | Lisp_Object Qdisplay_table, Qredisplay_dont_pause; |
5f5c8ee5 | 107 | |
59ea14cd | 108 | /* True means SIGWINCH happened when not safe. */ |
4588ec20 | 109 | |
59ea14cd | 110 | static bool delayed_size_change; |
4588ec20 | 111 | |
5f5c8ee5 | 112 | /* A glyph for a space. */ |
4588ec20 | 113 | |
5f5c8ee5 | 114 | struct glyph space_glyph; |
4588ec20 | 115 | |
f0b79313 DA |
116 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
117 | ||
5f5c8ee5 GM |
118 | /* Counts of allocated structures. These counts serve to diagnose |
119 | memory leaks and double frees. */ | |
4588ec20 | 120 | |
5bf46f05 PE |
121 | static int glyph_matrix_count; |
122 | static int glyph_pool_count; | |
4588ec20 | 123 | |
f0b79313 DA |
124 | #endif /* GLYPH_DEBUG and ENABLE_CHECKING */ |
125 | ||
5f5c8ee5 GM |
126 | /* If non-null, the frame whose frame matrices are manipulated. If |
127 | null, window matrices are worked on. */ | |
4588ec20 | 128 | |
5f5c8ee5 | 129 | static struct frame *frame_matrix_frame; |
4588ec20 | 130 | |
177c0ea7 | 131 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 132 | This may only be used for terminal frames. */ |
836d2cde | 133 | |
e509cfa6 | 134 | #ifdef GLYPH_DEBUG |
4588ec20 | 135 | |
f57e2426 J |
136 | static int window_to_frame_vpos (struct window *, int); |
137 | static int window_to_frame_hpos (struct window *, int); | |
5f5c8ee5 GM |
138 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) |
139 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 140 | |
9b0e97aa GM |
141 | /* One element of the ring buffer containing redisplay history |
142 | information. */ | |
143 | ||
144 | struct redisplay_history | |
145 | { | |
146 | char trace[512 + 100]; | |
147 | }; | |
148 | ||
149 | /* The size of the history buffer. */ | |
150 | ||
151 | #define REDISPLAY_HISTORY_SIZE 30 | |
152 | ||
153 | /* The redisplay history buffer. */ | |
154 | ||
155 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
156 | ||
157 | /* Next free entry in redisplay_history. */ | |
158 | ||
159 | static int history_idx; | |
160 | ||
161 | /* A tick that's incremented each time something is added to the | |
162 | history. */ | |
163 | ||
dfd153ae | 164 | static uprintmax_t history_tick; |
6a8aec41 | 165 | \f |
9b0e97aa GM |
166 | /* Add to the redisplay history how window W has been displayed. |
167 | MSG is a trace containing the information how W's glyph matrix | |
59ea14cd | 168 | has been constructed. PAUSED_P means that the update |
9b0e97aa GM |
169 | has been interrupted for pending input. */ |
170 | ||
171 | static void | |
59ea14cd | 172 | add_window_display_history (struct window *w, const char *msg, bool paused_p) |
9b0e97aa GM |
173 | { |
174 | char *buf; | |
29abe551 | 175 | void *ptr = w; |
177c0ea7 | 176 | |
9b0e97aa GM |
177 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
178 | history_idx = 0; | |
179 | buf = redisplay_history[history_idx].trace; | |
180 | ++history_idx; | |
177c0ea7 | 181 | |
8666506e PE |
182 | snprintf (buf, sizeof redisplay_history[0].trace, |
183 | "%"pMu": window %p (`%s')%s\n%s", | |
184 | history_tick++, | |
29abe551 | 185 | ptr, |
e74aeda8 DA |
186 | ((BUFFERP (w->contents) |
187 | && STRINGP (BVAR (XBUFFER (w->contents), name))) | |
188 | ? SSDATA (BVAR (XBUFFER (w->contents), name)) | |
8666506e PE |
189 | : "???"), |
190 | paused_p ? " ***paused***" : "", | |
191 | msg); | |
9b0e97aa GM |
192 | } |
193 | ||
194 | ||
195 | /* Add to the redisplay history that frame F has been displayed. | |
59ea14cd | 196 | PAUSED_P means that the update has been interrupted for |
9b0e97aa GM |
197 | pending input. */ |
198 | ||
199 | static void | |
59ea14cd | 200 | add_frame_display_history (struct frame *f, bool paused_p) |
9b0e97aa GM |
201 | { |
202 | char *buf; | |
29abe551 | 203 | void *ptr = f; |
177c0ea7 | 204 | |
9b0e97aa GM |
205 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
206 | history_idx = 0; | |
207 | buf = redisplay_history[history_idx].trace; | |
208 | ++history_idx; | |
177c0ea7 | 209 | |
dfd153ae | 210 | sprintf (buf, "%"pMu": update frame %p%s", |
9b0e97aa | 211 | history_tick++, |
29abe551 | 212 | ptr, paused_p ? " ***paused***" : ""); |
9b0e97aa GM |
213 | } |
214 | ||
215 | ||
a7ca3326 | 216 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, |
9b0e97aa | 217 | Sdump_redisplay_history, 0, 0, "", |
7ee72033 | 218 | doc: /* Dump redisplay history to stderr. */) |
5842a27b | 219 | (void) |
9b0e97aa GM |
220 | { |
221 | int i; | |
222 | ||
223 | for (i = history_idx - 1; i != history_idx; --i) | |
224 | { | |
225 | if (i < 0) | |
226 | i = REDISPLAY_HISTORY_SIZE - 1; | |
227 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
228 | } | |
229 | ||
230 | return Qnil; | |
231 | } | |
232 | ||
233 | ||
e509cfa6 | 234 | #else /* not GLYPH_DEBUG */ |
4588ec20 | 235 | |
7df02016 KS |
236 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
237 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 238 | |
e509cfa6 | 239 | #endif /* GLYPH_DEBUG */ |
4588ec20 | 240 | |
4588ec20 | 241 | |
9e4bf381 PE |
242 | #if (defined PROFILING \ |
243 | && (defined __FreeBSD__ || defined GNU_LINUX || defined __MINGW32__) \ | |
244 | && !HAVE___EXECUTABLE_START) | |
245 | /* This function comes first in the Emacs executable and is used only | |
246 | to estimate the text start for profiling. */ | |
4588ec20 | 247 | void |
9e4bf381 | 248 | __executable_start (void) |
4588ec20 | 249 | { |
1088b922 | 250 | emacs_abort (); |
177c0ea7 | 251 | } |
72af86bd | 252 | #endif |
5f5c8ee5 GM |
253 | \f |
254 | /*********************************************************************** | |
255 | Glyph Matrices | |
256 | ***********************************************************************/ | |
257 | ||
258 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
259 | pool from which memory for the matrix should be allocated, or null | |
260 | for window-based redisplay where no glyph pools are used. The | |
261 | member `pool' of the glyph matrix structure returned is set to | |
262 | POOL, the structure is otherwise zeroed. */ | |
263 | ||
5bf46f05 | 264 | static struct glyph_matrix * |
971de7fb | 265 | new_glyph_matrix (struct glyph_pool *pool) |
4588ec20 | 266 | { |
23f86fce | 267 | struct glyph_matrix *result = xzalloc (sizeof *result); |
4588ec20 | 268 | |
f0b79313 | 269 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
5f5c8ee5 GM |
270 | /* Increment number of allocated matrices. This count is used |
271 | to detect memory leaks. */ | |
272 | ++glyph_matrix_count; | |
f0b79313 | 273 | #endif |
4588ec20 | 274 | |
5f5c8ee5 GM |
275 | /* Set pool and return. */ |
276 | result->pool = pool; | |
277 | return result; | |
4588ec20 JB |
278 | } |
279 | ||
4588ec20 | 280 | |
5f5c8ee5 GM |
281 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
282 | ||
f0b79313 DA |
283 | If GLYPH_DEBUG and ENABLE_CHECKING are in effect, the global counter |
284 | glyph_matrix_count is decremented when a matrix is freed. If the count | |
285 | gets negative, more structures were freed than allocated, i.e. one matrix | |
286 | was freed more than once or a bogus pointer was passed to this function. | |
177c0ea7 | 287 | |
5f5c8ee5 GM |
288 | If MATRIX->pool is null, this means that the matrix manages its own |
289 | glyph memory---this is done for matrices on X frames. Freeing the | |
290 | matrix also frees the glyph memory in this case. */ | |
291 | ||
292 | static void | |
971de7fb | 293 | free_glyph_matrix (struct glyph_matrix *matrix) |
4588ec20 | 294 | { |
5f5c8ee5 GM |
295 | if (matrix) |
296 | { | |
297 | int i; | |
298 | ||
f0b79313 | 299 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
5f5c8ee5 GM |
300 | /* Detect the case that more matrices are freed than were |
301 | allocated. */ | |
f0b79313 DA |
302 | --glyph_matrix_count; |
303 | eassert (glyph_matrix_count >= 0); | |
304 | #endif | |
5f5c8ee5 GM |
305 | |
306 | /* Free glyph memory if MATRIX owns it. */ | |
307 | if (matrix->pool == NULL) | |
308 | for (i = 0; i < matrix->rows_allocated; ++i) | |
309 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 310 | |
5f5c8ee5 GM |
311 | /* Free row structures and the matrix itself. */ |
312 | xfree (matrix->rows); | |
313 | xfree (matrix); | |
314 | } | |
315 | } | |
4588ec20 | 316 | |
4588ec20 | 317 | |
5f5c8ee5 GM |
318 | /* Return the number of glyphs to reserve for a marginal area of |
319 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
320 | display line of window W. MARGIN gives the width of the marginal | |
eeaf9bf3 | 321 | area in canonical character units. */ |
5f5c8ee5 GM |
322 | |
323 | static int | |
eeaf9bf3 | 324 | margin_glyphs_to_reserve (struct window *w, int total_glyphs, int margin) |
5f5c8ee5 | 325 | { |
eeaf9bf3 | 326 | if (margin > 0) |
4588ec20 | 327 | { |
5f24fa51 | 328 | int width = w->total_cols; |
eeaf9bf3 | 329 | double d = max (0, margin); |
5f5c8ee5 | 330 | d = min (width / 2 - 1, d); |
eeaf9bf3 | 331 | return (int) ((double) total_glyphs / width * d); |
5f5c8ee5 | 332 | } |
eeaf9bf3 | 333 | return 0; |
5f5c8ee5 GM |
334 | } |
335 | ||
59ea14cd | 336 | /* Return true if ROW's hash value is correct. |
e509cfa6 DA |
337 | Optimized away if ENABLE_CHECKING is not defined. */ |
338 | ||
59ea14cd | 339 | static bool |
7a7270dd EZ |
340 | verify_row_hash (struct glyph_row *row) |
341 | { | |
015137db | 342 | return row->hash == row_hash (row); |
7a7270dd | 343 | } |
4588ec20 | 344 | |
5f5c8ee5 GM |
345 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
346 | window sizes. | |
4588ec20 | 347 | |
5f5c8ee5 GM |
348 | W is null if the function is called for a frame glyph matrix. |
349 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
350 | indices of the first column and row of MATRIX within the frame | |
351 | matrix, if such a matrix exists. They are zero for purely | |
352 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 353 | |
5f5c8ee5 GM |
354 | In window-based redisplay, where no frame matrices exist, glyph |
355 | matrices manage their own glyph storage. Otherwise, they allocate | |
356 | storage from a common frame glyph pool which can be found in | |
357 | MATRIX->pool. | |
23b0200c | 358 | |
5f5c8ee5 GM |
359 | The reason for this memory management strategy is to avoid complete |
360 | frame redraws if possible. When we allocate from a common pool, a | |
361 | change of the location or size of a sub-matrix within the pool | |
362 | requires a complete redisplay of the frame because we cannot easily | |
363 | make sure that the current matrices of all windows still agree with | |
364 | what is displayed on the screen. While this is usually fast, it | |
365 | leads to screen flickering. */ | |
23b0200c | 366 | |
5f5c8ee5 | 367 | static void |
971de7fb | 368 | adjust_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int x, int y, struct dim dim) |
5f5c8ee5 GM |
369 | { |
370 | int i; | |
371 | int new_rows; | |
59ea14cd PE |
372 | bool marginal_areas_changed_p = 0; |
373 | bool header_line_changed_p = 0; | |
374 | bool header_line_p = 0; | |
5f5c8ee5 | 375 | int left = -1, right = -1; |
ca8a12a7 | 376 | int window_width = -1, window_height = -1; |
5f5c8ee5 | 377 | |
6b61353c KH |
378 | /* See if W had a header line that has disappeared now, or vice versa. |
379 | Get W's size. */ | |
5f5c8ee5 GM |
380 | if (w) |
381 | { | |
c3c4768d | 382 | window_box (w, ANY_AREA, 0, 0, &window_width, &window_height); |
6b61353c | 383 | |
045dee35 GM |
384 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
385 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 386 | } |
045dee35 | 387 | matrix->header_line_p = header_line_p; |
23b0200c | 388 | |
6b61353c KH |
389 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
390 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
391 | haven't changed. This optimization is important because preserving |
392 | the matrix means preventing redisplay. */ | |
393 | if (matrix->pool == NULL) | |
394 | { | |
d3d50620 DA |
395 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
396 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
a54e2c05 | 397 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
398 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs |
399 | || right != matrix->right_margin_glyphs); | |
400 | ||
401 | if (!marginal_areas_changed_p | |
bd0443bb | 402 | && !XFRAME (w->frame)->fonts_changed |
045dee35 | 403 | && !header_line_changed_p |
880e6158 MR |
404 | && matrix->window_pixel_left == WINDOW_LEFT_PIXEL_EDGE (w) |
405 | && matrix->window_pixel_top == WINDOW_TOP_PIXEL_EDGE (w) | |
5f5c8ee5 GM |
406 | && matrix->window_height == window_height |
407 | && matrix->window_vscroll == w->vscroll | |
408 | && matrix->window_width == window_width) | |
409 | return; | |
410 | } | |
177c0ea7 | 411 | |
5f5c8ee5 GM |
412 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
413 | if (matrix->rows_allocated < dim.height) | |
414 | { | |
0065d054 | 415 | int old_alloc = matrix->rows_allocated; |
5f5c8ee5 | 416 | new_rows = dim.height - matrix->rows_allocated; |
0065d054 PE |
417 | matrix->rows = xpalloc (matrix->rows, &matrix->rows_allocated, |
418 | new_rows, INT_MAX, sizeof *matrix->rows); | |
419 | memset (matrix->rows + old_alloc, 0, | |
420 | (matrix->rows_allocated - old_alloc) * sizeof *matrix->rows); | |
5f5c8ee5 GM |
421 | } |
422 | else | |
423 | new_rows = 0; | |
60a8948a | 424 | |
5f5c8ee5 GM |
425 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
426 | on a frame not using window-based redisplay. Set up pointers for | |
427 | each row into the glyph pool. */ | |
428 | if (matrix->pool) | |
429 | { | |
a54e2c05 | 430 | eassert (matrix->pool->glyphs); |
177c0ea7 | 431 | |
5f5c8ee5 | 432 | if (w) |
60a8948a | 433 | { |
5f5c8ee5 | 434 | left = margin_glyphs_to_reserve (w, dim.width, |
d3d50620 | 435 | w->left_margin_cols); |
5f5c8ee5 | 436 | right = margin_glyphs_to_reserve (w, dim.width, |
d3d50620 | 437 | w->right_margin_cols); |
60a8948a | 438 | } |
5f5c8ee5 GM |
439 | else |
440 | left = right = 0; | |
177c0ea7 | 441 | |
5f5c8ee5 | 442 | for (i = 0; i < dim.height; ++i) |
60a8948a | 443 | { |
5f5c8ee5 | 444 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
445 | |
446 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
447 | = (matrix->pool->glyphs |
448 | + (y + i) * matrix->pool->ncolumns | |
449 | + x); | |
177c0ea7 | 450 | |
5f5c8ee5 GM |
451 | if (w == NULL |
452 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 453 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
454 | { |
455 | row->glyphs[TEXT_AREA] | |
456 | = row->glyphs[LEFT_MARGIN_AREA]; | |
457 | row->glyphs[RIGHT_MARGIN_AREA] | |
458 | = row->glyphs[TEXT_AREA] + dim.width; | |
459 | row->glyphs[LAST_AREA] | |
460 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
461 | } | |
462 | else | |
463 | { | |
464 | row->glyphs[TEXT_AREA] | |
465 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
466 | row->glyphs[RIGHT_MARGIN_AREA] | |
467 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
468 | row->glyphs[LAST_AREA] | |
469 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
470 | } | |
60a8948a | 471 | } |
177c0ea7 | 472 | |
5f5c8ee5 GM |
473 | matrix->left_margin_glyphs = left; |
474 | matrix->right_margin_glyphs = right; | |
475 | } | |
476 | else | |
477 | { | |
478 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
6b61353c KH |
479 | its own memory. It is a window matrix for window-based redisplay. |
480 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
481 | if (dim.width > matrix->matrix_w |
482 | || new_rows | |
045dee35 | 483 | || header_line_changed_p |
5f5c8ee5 | 484 | || marginal_areas_changed_p) |
4588ec20 | 485 | { |
5f5c8ee5 GM |
486 | struct glyph_row *row = matrix->rows; |
487 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 488 | |
5f5c8ee5 GM |
489 | while (row < end) |
490 | { | |
491 | row->glyphs[LEFT_MARGIN_AREA] | |
0065d054 PE |
492 | = xnrealloc (row->glyphs[LEFT_MARGIN_AREA], |
493 | dim.width, sizeof (struct glyph)); | |
177c0ea7 | 494 | |
5f5c8ee5 GM |
495 | /* The mode line never has marginal areas. */ |
496 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 497 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
498 | { |
499 | row->glyphs[TEXT_AREA] | |
500 | = row->glyphs[LEFT_MARGIN_AREA]; | |
501 | row->glyphs[RIGHT_MARGIN_AREA] | |
502 | = row->glyphs[TEXT_AREA] + dim.width; | |
503 | row->glyphs[LAST_AREA] | |
504 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
505 | } | |
506 | else | |
507 | { | |
508 | row->glyphs[TEXT_AREA] | |
509 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
510 | row->glyphs[RIGHT_MARGIN_AREA] | |
511 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
512 | row->glyphs[LAST_AREA] | |
513 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
514 | } | |
515 | ++row; | |
516 | } | |
4588ec20 JB |
517 | } |
518 | ||
a54e2c05 | 519 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
520 | matrix->left_margin_glyphs = left; |
521 | matrix->right_margin_glyphs = right; | |
522 | } | |
177c0ea7 | 523 | |
5f5c8ee5 GM |
524 | /* Number of rows to be used by MATRIX. */ |
525 | matrix->nrows = dim.height; | |
a54e2c05 | 526 | eassert (matrix->nrows >= 0); |
5f5c8ee5 | 527 | |
b7b20fbd | 528 | if (w) |
5f5c8ee5 | 529 | { |
b7b20fbd | 530 | if (matrix == w->current_matrix) |
4588ec20 | 531 | { |
b7b20fbd GM |
532 | /* Mark rows in a current matrix of a window as not having |
533 | valid contents. It's important to not do this for | |
534 | desired matrices. When Emacs starts, it may already be | |
535 | building desired matrices when this function runs. */ | |
536 | if (window_width < 0) | |
537 | window_width = window_box_width (w, -1); | |
177c0ea7 | 538 | |
b7b20fbd GM |
539 | /* Optimize the case that only the height has changed (C-x 2, |
540 | upper window). Invalidate all rows that are no longer part | |
541 | of the window. */ | |
542 | if (!marginal_areas_changed_p | |
73d75a62 GM |
543 | && !header_line_changed_p |
544 | && new_rows == 0 | |
545 | && dim.width == matrix->matrix_w | |
880e6158 MR |
546 | && matrix->window_pixel_left == WINDOW_LEFT_PIXEL_EDGE (w) |
547 | && matrix->window_pixel_top == WINDOW_TOP_PIXEL_EDGE (w) | |
73d75a62 | 548 | && matrix->window_width == window_width) |
b7b20fbd | 549 | { |
dd42b31a GM |
550 | /* Find the last row in the window. */ |
551 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
552 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
553 | { | |
26447967 | 554 | ++i; |
dd42b31a GM |
555 | break; |
556 | } | |
b7b20fbd GM |
557 | |
558 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 559 | are invalidated below. */ |
02455cb6 | 560 | if (w->window_end_vpos >= i) |
9d93ce29 | 561 | w->window_end_valid = 0; |
177c0ea7 | 562 | |
b7b20fbd | 563 | while (i < matrix->nrows) |
96c06863 | 564 | matrix->rows[i++].enabled_p = false; |
b7b20fbd GM |
565 | } |
566 | else | |
567 | { | |
568 | for (i = 0; i < matrix->nrows; ++i) | |
96c06863 | 569 | matrix->rows[i].enabled_p = false; |
b7b20fbd | 570 | } |
5f5c8ee5 | 571 | } |
b7b20fbd | 572 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 573 | { |
b7b20fbd GM |
574 | /* Rows in desired matrices always have to be cleared; |
575 | redisplay expects this is the case when it runs, so it | |
576 | had better be the case when we adjust matrices between | |
577 | redisplays. */ | |
5f5c8ee5 | 578 | for (i = 0; i < matrix->nrows; ++i) |
96c06863 | 579 | matrix->rows[i].enabled_p = false; |
4588ec20 | 580 | } |
4588ec20 | 581 | } |
177c0ea7 JB |
582 | |
583 | ||
5f5c8ee5 GM |
584 | /* Remember last values to be able to optimize frame redraws. */ |
585 | matrix->matrix_x = x; | |
586 | matrix->matrix_y = y; | |
587 | matrix->matrix_w = dim.width; | |
588 | matrix->matrix_h = dim.height; | |
589 | ||
590 | /* Record the top y location and height of W at the time the matrix | |
591 | was last adjusted. This is used to optimize redisplay above. */ | |
592 | if (w) | |
4588ec20 | 593 | { |
880e6158 MR |
594 | matrix->window_pixel_left = WINDOW_LEFT_PIXEL_EDGE (w); |
595 | matrix->window_pixel_top = WINDOW_TOP_PIXEL_EDGE (w); | |
5f5c8ee5 GM |
596 | matrix->window_height = window_height; |
597 | matrix->window_width = window_width; | |
598 | matrix->window_vscroll = w->vscroll; | |
599 | } | |
600 | } | |
4588ec20 | 601 | |
4588ec20 | 602 | |
5f5c8ee5 GM |
603 | /* Reverse the contents of rows in MATRIX between START and END. The |
604 | contents of the row at END - 1 end up at START, END - 2 at START + | |
605 | 1 etc. This is part of the implementation of rotate_matrix (see | |
606 | below). */ | |
d52bad65 | 607 | |
5f5c8ee5 | 608 | static void |
971de7fb | 609 | reverse_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 GM |
610 | { |
611 | int i, j; | |
23b0200c | 612 | |
5f5c8ee5 GM |
613 | for (i = start, j = end - 1; i < j; ++i, --j) |
614 | { | |
615 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
616 | initialization. */ | |
617 | struct glyph_row temp; | |
618 | temp = matrix->rows[i]; | |
619 | matrix->rows[i] = matrix->rows[j]; | |
620 | matrix->rows[j] = temp; | |
621 | } | |
622 | } | |
23b0200c | 623 | |
23b0200c | 624 | |
5f5c8ee5 GM |
625 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
626 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
627 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
628 | row structures are moved around). | |
60a8948a | 629 | |
5f5c8ee5 GM |
630 | The algorithm used for rotating the vector was, I believe, first |
631 | described by Kernighan. See the vector R as consisting of two | |
632 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
633 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
634 | and reverse the result to get (ArBr)r which is BA. Similar for | |
635 | rotating right. */ | |
636 | ||
637 | void | |
971de7fb | 638 | rotate_matrix (struct glyph_matrix *matrix, int first, int last, int by) |
5f5c8ee5 GM |
639 | { |
640 | if (by < 0) | |
641 | { | |
642 | /* Up (rotate left, i.e. towards lower indices). */ | |
643 | by = -by; | |
644 | reverse_rows (matrix, first, first + by); | |
645 | reverse_rows (matrix, first + by, last); | |
646 | reverse_rows (matrix, first, last); | |
647 | } | |
648 | else if (by > 0) | |
649 | { | |
650 | /* Down (rotate right, i.e. towards higher indices). */ | |
651 | reverse_rows (matrix, last - by, last); | |
652 | reverse_rows (matrix, first, last - by); | |
653 | reverse_rows (matrix, first, last); | |
654 | } | |
655 | } | |
656 | ||
657 | ||
658 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
659 | with indices START <= index < END. Increment positions by DELTA/ | |
660 | DELTA_BYTES. */ | |
661 | ||
662 | void | |
ace1712c | 663 | increment_matrix_positions (struct glyph_matrix *matrix, int start, int end, |
d311d28c | 664 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
665 | { |
666 | /* Check that START and END are reasonable values. */ | |
a54e2c05 DA |
667 | eassert (start >= 0 && start <= matrix->nrows); |
668 | eassert (end >= 0 && end <= matrix->nrows); | |
669 | eassert (start <= end); | |
5f5c8ee5 GM |
670 | |
671 | for (; start < end; ++start) | |
86c11ba1 | 672 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
673 | } |
674 | ||
675 | ||
59ea14cd PE |
676 | /* Clear the enable_p flags in a range of rows in glyph matrix MATRIX. |
677 | START and END are the row indices of the first and last + 1 row to clear. */ | |
5f5c8ee5 GM |
678 | |
679 | void | |
59ea14cd | 680 | clear_glyph_matrix_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 | 681 | { |
a54e2c05 DA |
682 | eassert (start <= end); |
683 | eassert (start >= 0 && start < matrix->nrows); | |
684 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 685 | |
5f5c8ee5 | 686 | for (; start < end; ++start) |
96c06863 | 687 | matrix->rows[start].enabled_p = false; |
5f5c8ee5 GM |
688 | } |
689 | ||
690 | ||
691 | /* Clear MATRIX. | |
692 | ||
59ea14cd PE |
693 | Empty all rows in MATRIX by clearing their enabled_p flags. |
694 | The function prepare_desired_row will eventually really clear a row | |
695 | when it sees one with a false enabled_p flag. | |
5f5c8ee5 | 696 | |
59ea14cd | 697 | Reset update hints to default values. The only update hint |
5f5c8ee5 GM |
698 | currently present is the flag MATRIX->no_scrolling_p. */ |
699 | ||
700 | void | |
971de7fb | 701 | clear_glyph_matrix (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
702 | { |
703 | if (matrix) | |
704 | { | |
59ea14cd | 705 | clear_glyph_matrix_rows (matrix, 0, matrix->nrows); |
5f5c8ee5 GM |
706 | matrix->no_scrolling_p = 0; |
707 | } | |
708 | } | |
177c0ea7 | 709 | |
5f5c8ee5 GM |
710 | |
711 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
712 | Increment y-positions in glyph rows between START and END by DY, | |
713 | and recompute their visible height. */ | |
714 | ||
715 | void | |
971de7fb | 716 | shift_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int start, int end, int dy) |
5f5c8ee5 GM |
717 | { |
718 | int min_y, max_y; | |
177c0ea7 | 719 | |
a54e2c05 DA |
720 | eassert (start <= end); |
721 | eassert (start >= 0 && start < matrix->nrows); | |
722 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 723 | |
7df02016 KS |
724 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
725 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 726 | |
5f5c8ee5 GM |
727 | for (; start < end; ++start) |
728 | { | |
729 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 730 | |
5f5c8ee5 | 731 | row->y += dy; |
d6c747a4 | 732 | row->visible_height = row->height; |
177c0ea7 | 733 | |
5f5c8ee5 | 734 | if (row->y < min_y) |
d6c747a4 GM |
735 | row->visible_height -= min_y - row->y; |
736 | if (row->y + row->height > max_y) | |
737 | row->visible_height -= row->y + row->height - max_y; | |
e61124cd YM |
738 | if (row->fringe_bitmap_periodic_p) |
739 | row->redraw_fringe_bitmaps_p = 1; | |
5f5c8ee5 GM |
740 | } |
741 | } | |
742 | ||
743 | ||
744 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
745 | invalid is done by setting enabled_p to zero for all rows in a | |
746 | current matrix. */ | |
747 | ||
748 | void | |
971de7fb | 749 | clear_current_matrices (register struct frame *f) |
5f5c8ee5 GM |
750 | { |
751 | /* Clear frame current matrix, if we have one. */ | |
752 | if (f->current_matrix) | |
753 | clear_glyph_matrix (f->current_matrix); | |
754 | ||
5a49b79c | 755 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
756 | /* Clear the matrix of the menu bar window, if such a window exists. |
757 | The menu bar window is currently used to display menus on X when | |
758 | no toolkit support is compiled in. */ | |
e69b0960 DA |
759 | if (WINDOWP (f->menu_bar_window)) |
760 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
5a49b79c | 761 | #endif |
5f5c8ee5 | 762 | |
742516e0 | 763 | #if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS) |
9ea173e8 | 764 | /* Clear the matrix of the tool-bar window, if any. */ |
e69b0960 DA |
765 | if (WINDOWP (f->tool_bar_window)) |
766 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
742516e0 | 767 | #endif |
5f5c8ee5 GM |
768 | |
769 | /* Clear current window matrices. */ | |
a54e2c05 | 770 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
771 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); |
772 | } | |
773 | ||
774 | ||
775 | /* Clear out all display lines of F for a coming redisplay. */ | |
776 | ||
777 | void | |
971de7fb | 778 | clear_desired_matrices (register struct frame *f) |
5f5c8ee5 GM |
779 | { |
780 | if (f->desired_matrix) | |
781 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 782 | |
5a49b79c | 783 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
e69b0960 DA |
784 | if (WINDOWP (f->menu_bar_window)) |
785 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
5a49b79c | 786 | #endif |
5f5c8ee5 | 787 | |
742516e0 | 788 | #if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS) |
e69b0960 DA |
789 | if (WINDOWP (f->tool_bar_window)) |
790 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
742516e0 | 791 | #endif |
5f5c8ee5 GM |
792 | |
793 | /* Do it for window matrices. */ | |
a54e2c05 | 794 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
795 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); |
796 | } | |
797 | ||
798 | ||
59ea14cd PE |
799 | /* Clear matrices in window tree rooted in W. If DESIRED_P, |
800 | clear desired matrices, otherwise clear current matrices. */ | |
5f5c8ee5 GM |
801 | |
802 | static void | |
59ea14cd | 803 | clear_window_matrices (struct window *w, bool desired_p) |
5f5c8ee5 GM |
804 | { |
805 | while (w) | |
806 | { | |
e74aeda8 DA |
807 | if (WINDOWP (w->contents)) |
808 | clear_window_matrices (XWINDOW (w->contents), desired_p); | |
5f5c8ee5 GM |
809 | else |
810 | { | |
811 | if (desired_p) | |
812 | clear_glyph_matrix (w->desired_matrix); | |
813 | else | |
814 | { | |
815 | clear_glyph_matrix (w->current_matrix); | |
9d93ce29 | 816 | w->window_end_valid = 0; |
5f5c8ee5 GM |
817 | } |
818 | } | |
819 | ||
d3d50620 | 820 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
821 | } |
822 | } | |
823 | ||
824 | ||
825 | \f | |
826 | /*********************************************************************** | |
827 | Glyph Rows | |
828 | ||
829 | See dispextern.h for an overall explanation of glyph rows. | |
830 | ***********************************************************************/ | |
831 | ||
ec7bc82f DA |
832 | /* Clear glyph row ROW. NOTE: this code relies on the current |
833 | layout of `glyphs' and `used' fields of `struct glyph_row'. */ | |
2cca872d | 834 | |
5f5c8ee5 | 835 | void |
971de7fb | 836 | clear_glyph_row (struct glyph_row *row) |
5f5c8ee5 | 837 | { |
cf647d93 | 838 | enum { off = offsetof (struct glyph_row, used) }; |
ec7bc82f | 839 | |
ec7bc82f | 840 | /* Zero everything except pointers in `glyphs'. */ |
9da0f50e | 841 | memset (row->used, 0, sizeof *row - off); |
5f5c8ee5 GM |
842 | } |
843 | ||
844 | ||
845 | /* Make ROW an empty, enabled row of canonical character height, | |
846 | in window W starting at y-position Y. */ | |
847 | ||
848 | void | |
971de7fb | 849 | blank_row (struct window *w, struct glyph_row *row, int y) |
5f5c8ee5 GM |
850 | { |
851 | int min_y, max_y; | |
177c0ea7 | 852 | |
7df02016 KS |
853 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
854 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 855 | |
5f5c8ee5 GM |
856 | clear_glyph_row (row); |
857 | row->y = y; | |
408f5064 | 858 | row->ascent = row->phys_ascent = 0; |
d3d50620 | 859 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 860 | row->visible_height = row->height; |
177c0ea7 | 861 | |
5f5c8ee5 | 862 | if (row->y < min_y) |
d6c747a4 GM |
863 | row->visible_height -= min_y - row->y; |
864 | if (row->y + row->height > max_y) | |
865 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 | 866 | |
96c06863 | 867 | row->enabled_p = true; |
5f5c8ee5 GM |
868 | } |
869 | ||
870 | ||
871 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
872 | are the amounts by which to change positions. Note that the first | |
873 | glyph of the text area of a row can have a buffer position even if | |
874 | the used count of the text area is zero. Such rows display line | |
875 | ends. */ | |
876 | ||
5bf46f05 | 877 | static void |
ace1712c | 878 | increment_row_positions (struct glyph_row *row, |
d311d28c | 879 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
880 | { |
881 | int area, i; | |
882 | ||
883 | /* Increment start and end positions. */ | |
884 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
885 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
886 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
887 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
d36fe237 EZ |
888 | CHARPOS (row->start.pos) += delta; |
889 | BYTEPOS (row->start.pos) += delta_bytes; | |
890 | CHARPOS (row->end.pos) += delta; | |
891 | BYTEPOS (row->end.pos) += delta_bytes; | |
5f5c8ee5 | 892 | |
5cacdcfd KS |
893 | if (!row->enabled_p) |
894 | return; | |
895 | ||
5f5c8ee5 GM |
896 | /* Increment positions in glyphs. */ |
897 | for (area = 0; area < LAST_AREA; ++area) | |
898 | for (i = 0; i < row->used[area]; ++i) | |
899 | if (BUFFERP (row->glyphs[area][i].object) | |
900 | && row->glyphs[area][i].charpos > 0) | |
901 | row->glyphs[area][i].charpos += delta; | |
902 | ||
903 | /* Capture the case of rows displaying a line end. */ | |
904 | if (row->used[TEXT_AREA] == 0 | |
905 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
906 | row->glyphs[TEXT_AREA]->charpos += delta; | |
907 | } | |
908 | ||
909 | ||
9af3e742 | 910 | #if 0 |
5f5c8ee5 GM |
911 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
912 | contents, i.e. glyph structure contents are exchanged between A and | |
913 | B without changing glyph pointers in A and B. */ | |
914 | ||
915 | static void | |
1dae0f0a | 916 | swap_glyphs_in_rows (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
917 | { |
918 | int area; | |
919 | ||
920 | for (area = 0; area < LAST_AREA; ++area) | |
921 | { | |
922 | /* Number of glyphs to swap. */ | |
923 | int max_used = max (a->used[area], b->used[area]); | |
924 | ||
925 | /* Start of glyphs in area of row A. */ | |
926 | struct glyph *glyph_a = a->glyphs[area]; | |
927 | ||
928 | /* End + 1 of glyphs in area of row A. */ | |
929 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
930 | ||
931 | /* Start of glyphs in area of row B. */ | |
932 | struct glyph *glyph_b = b->glyphs[area]; | |
933 | ||
934 | while (glyph_a < glyph_a_end) | |
935 | { | |
936 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
937 | initialization. */ | |
938 | struct glyph temp; | |
939 | temp = *glyph_a; | |
940 | *glyph_a = *glyph_b; | |
941 | *glyph_b = temp; | |
942 | ++glyph_a; | |
943 | ++glyph_b; | |
944 | } | |
945 | } | |
946 | } | |
947 | ||
9af3e742 | 948 | #endif /* 0 */ |
5f5c8ee5 | 949 | |
015137db EZ |
950 | /* Exchange pointers to glyph memory between glyph rows A and B. Also |
951 | exchange the used[] array and the hash values of the rows, because | |
952 | these should all go together for the row's hash value to be | |
953 | correct. */ | |
5f5c8ee5 | 954 | |
b0ab8123 | 955 | static void |
971de7fb | 956 | swap_glyph_pointers (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
957 | { |
958 | int i; | |
015137db EZ |
959 | unsigned hash_tem = a->hash; |
960 | ||
5f5c8ee5 GM |
961 | for (i = 0; i < LAST_AREA + 1; ++i) |
962 | { | |
963 | struct glyph *temp = a->glyphs[i]; | |
015137db | 964 | |
5f5c8ee5 GM |
965 | a->glyphs[i] = b->glyphs[i]; |
966 | b->glyphs[i] = temp; | |
73055685 EZ |
967 | if (i < LAST_AREA) |
968 | { | |
969 | short used_tem = a->used[i]; | |
970 | ||
971 | a->used[i] = b->used[i]; | |
972 | b->used[i] = used_tem; | |
973 | } | |
5f5c8ee5 | 974 | } |
015137db EZ |
975 | a->hash = b->hash; |
976 | b->hash = hash_tem; | |
5f5c8ee5 GM |
977 | } |
978 | ||
979 | ||
ec7bc82f DA |
980 | /* Copy glyph row structure FROM to glyph row structure TO, except that |
981 | glyph pointers, the `used' counts, and the hash values in the structures | |
982 | are left unchanged. NOTE: this code relies on the current layout of | |
983 | `glyphs', `used', `hash' and `x' fields of `struct glyph_row'. */ | |
5f5c8ee5 | 984 | |
b0ab8123 | 985 | static void |
971de7fb | 986 | copy_row_except_pointers (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 | 987 | { |
cf647d93 | 988 | enum { off = offsetof (struct glyph_row, x) }; |
ec7bc82f | 989 | |
9da0f50e | 990 | memcpy (&to->x, &from->x, sizeof *to - off); |
5f5c8ee5 GM |
991 | } |
992 | ||
993 | ||
5f5c8ee5 GM |
994 | /* Assign glyph row FROM to glyph row TO. This works like a structure |
995 | assignment TO = FROM, except that glyph pointers are not copied but | |
996 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
997 | a memory leak. */ | |
998 | ||
b0ab8123 | 999 | static void |
971de7fb | 1000 | assign_row (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1001 | { |
1002 | swap_glyph_pointers (to, from); | |
1003 | copy_row_except_pointers (to, from); | |
1004 | } | |
1005 | ||
1006 | ||
1007 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1008 | a row in a window matrix, is a slice of the glyph memory of the | |
1009 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
59ea14cd | 1010 | is true if the glyph memory of WINDOW_ROW is part of the glyph |
5f5c8ee5 GM |
1011 | memory of FRAME_ROW. */ |
1012 | ||
e509cfa6 | 1013 | #ifdef GLYPH_DEBUG |
9339e87f | 1014 | |
59ea14cd | 1015 | static bool |
59fc5cf9 | 1016 | glyph_row_slice_p (struct glyph_row *window_row, struct glyph_row *frame_row) |
5f5c8ee5 GM |
1017 | { |
1018 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1019 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1020 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1021 | ||
1022 | return (frame_glyph_start <= window_glyph_start | |
1023 | && window_glyph_start < frame_glyph_end); | |
1024 | } | |
1025 | ||
9339e87f | 1026 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1027 | |
9af3e742 GM |
1028 | #if 0 |
1029 | ||
5f5c8ee5 GM |
1030 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1031 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1032 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1033 | ||
1034 | static struct glyph_row * | |
59fc5cf9 AS |
1035 | find_glyph_row_slice (struct glyph_matrix *window_matrix, |
1036 | struct glyph_matrix *frame_matrix, int row) | |
5f5c8ee5 GM |
1037 | { |
1038 | int i; | |
1039 | ||
a54e2c05 | 1040 | eassert (row >= 0 && row < frame_matrix->nrows); |
5f5c8ee5 GM |
1041 | |
1042 | for (i = 0; i < window_matrix->nrows; ++i) | |
1043 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1044 | frame_matrix->rows + row)) | |
1045 | break; | |
1046 | ||
1047 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1048 | } | |
1049 | ||
9af3e742 | 1050 | #endif /* 0 */ |
5f5c8ee5 GM |
1051 | |
1052 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1053 | i.e. they are only marked as to be cleared by setting their | |
1054 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1055 | call to this function really clears it. */ | |
1056 | ||
1057 | void | |
971de7fb | 1058 | prepare_desired_row (struct glyph_row *row) |
5f5c8ee5 GM |
1059 | { |
1060 | if (!row->enabled_p) | |
1061 | { | |
59ea14cd | 1062 | bool rp = row->reversed_p; |
5009f85e | 1063 | |
5f5c8ee5 | 1064 | clear_glyph_row (row); |
96c06863 | 1065 | row->enabled_p = true; |
5009f85e | 1066 | row->reversed_p = rp; |
5f5c8ee5 GM |
1067 | } |
1068 | } | |
1069 | ||
1070 | ||
77e3b1b7 DA |
1071 | /* Return a hash code for glyph row ROW, which may |
1072 | be from current or desired matrix of frame F. */ | |
5f5c8ee5 | 1073 | |
2f7c71a1 | 1074 | static int |
77e3b1b7 | 1075 | line_hash_code (struct frame *f, struct glyph_row *row) |
5f5c8ee5 GM |
1076 | { |
1077 | int hash = 0; | |
177c0ea7 | 1078 | |
5f5c8ee5 GM |
1079 | if (row->enabled_p) |
1080 | { | |
4cecaab8 MB |
1081 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1082 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1083 | ||
1084 | while (glyph < end) | |
1085 | { | |
1086 | int c = glyph->u.ch; | |
1087 | int face_id = glyph->face_id; | |
77e3b1b7 | 1088 | if (FRAME_MUST_WRITE_SPACES (f)) |
4cecaab8 MB |
1089 | c -= SPACEGLYPH; |
1090 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1091 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1092 | ++glyph; | |
1093 | } | |
5f5c8ee5 | 1094 | |
4cecaab8 MB |
1095 | if (hash == 0) |
1096 | hash = 1; | |
5f5c8ee5 GM |
1097 | } |
1098 | ||
1099 | return hash; | |
1100 | } | |
1101 | ||
1102 | ||
77e3b1b7 DA |
1103 | /* Return the cost of drawing line VPOS in MATRIX, which may |
1104 | be current or desired matrix of frame F. The cost equals | |
1105 | the number of characters in the line. If must_write_spaces | |
1106 | is zero, leading and trailing spaces are ignored. */ | |
5f5c8ee5 | 1107 | |
dfd153ae | 1108 | static int |
77e3b1b7 | 1109 | line_draw_cost (struct frame *f, struct glyph_matrix *matrix, int vpos) |
5f5c8ee5 GM |
1110 | { |
1111 | struct glyph_row *row = matrix->rows + vpos; | |
1112 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1113 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1114 | int len; | |
1115 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
ca9ce8f2 | 1116 | ptrdiff_t glyph_table_len = GLYPH_TABLE_LENGTH; |
5f5c8ee5 GM |
1117 | |
1118 | /* Ignore trailing and leading spaces if we can. */ | |
77e3b1b7 | 1119 | if (!FRAME_MUST_WRITE_SPACES (f)) |
5f5c8ee5 GM |
1120 | { |
1121 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1122 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1123 | --end; |
1124 | ||
177c0ea7 | 1125 | /* All blank line. */ |
5f5c8ee5 GM |
1126 | if (end == beg) |
1127 | return 0; | |
1128 | ||
1129 | /* Skip over leading spaces. */ | |
1130 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1131 | ++beg; | |
1132 | } | |
1133 | ||
1134 | /* If we don't have a glyph-table, each glyph is one character, | |
1135 | so return the number of glyphs. */ | |
1136 | if (glyph_table_base == 0) | |
1137 | len = end - beg; | |
1138 | else | |
1139 | { | |
1140 | /* Otherwise, scan the glyphs and accumulate their total length | |
1141 | in LEN. */ | |
1142 | len = 0; | |
1143 | while (beg < end) | |
1144 | { | |
3fc809e2 | 1145 | GLYPH g; |
177c0ea7 | 1146 | |
3fc809e2 KS |
1147 | SET_GLYPH_FROM_CHAR_GLYPH (g, *beg); |
1148 | ||
565b39a8 | 1149 | if (GLYPH_INVALID_P (g) |
42186983 | 1150 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) |
5f5c8ee5 GM |
1151 | len += 1; |
1152 | else | |
1153 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1154 | |
5f5c8ee5 GM |
1155 | ++beg; |
1156 | } | |
1157 | } | |
177c0ea7 | 1158 | |
5f5c8ee5 GM |
1159 | return len; |
1160 | } | |
1161 | ||
1162 | ||
59ea14cd PE |
1163 | /* Return true if the glyph rows A and B have equal contents. |
1164 | MOUSE_FACE_P means compare the mouse_face_p flags of A and B, too. */ | |
5f5c8ee5 | 1165 | |
b0ab8123 | 1166 | static bool |
59ea14cd | 1167 | row_equal_p (struct glyph_row *a, struct glyph_row *b, bool mouse_face_p) |
5f5c8ee5 | 1168 | { |
a54e2c05 DA |
1169 | eassert (verify_row_hash (a)); |
1170 | eassert (verify_row_hash (b)); | |
7a7270dd | 1171 | |
5f5c8ee5 GM |
1172 | if (a == b) |
1173 | return 1; | |
1174 | else if (a->hash != b->hash) | |
1175 | return 0; | |
1176 | else | |
1177 | { | |
1178 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1179 | int area; | |
1180 | ||
e4e0bee9 GM |
1181 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1182 | return 0; | |
1183 | ||
5f5c8ee5 GM |
1184 | /* Compare glyphs. */ |
1185 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1186 | { | |
1187 | if (a->used[area] != b->used[area]) | |
1188 | return 0; | |
177c0ea7 | 1189 | |
5f5c8ee5 GM |
1190 | a_glyph = a->glyphs[area]; |
1191 | a_end = a_glyph + a->used[area]; | |
1192 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1193 | |
5f5c8ee5 GM |
1194 | while (a_glyph < a_end |
1195 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1196 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1197 | |
5f5c8ee5 GM |
1198 | if (a_glyph != a_end) |
1199 | return 0; | |
1200 | } | |
1201 | ||
6b61353c KH |
1202 | if (a->fill_line_p != b->fill_line_p |
1203 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1204 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
1205 | || a->left_fringe_face_id != b->left_fringe_face_id | |
e61124cd | 1206 | || a->left_fringe_offset != b->left_fringe_offset |
6b61353c KH |
1207 | || a->right_fringe_bitmap != b->right_fringe_bitmap |
1208 | || a->right_fringe_face_id != b->right_fringe_face_id | |
e61124cd YM |
1209 | || a->right_fringe_offset != b->right_fringe_offset |
1210 | || a->fringe_bitmap_periodic_p != b->fringe_bitmap_periodic_p | |
3d4a365f | 1211 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
6b61353c | 1212 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1213 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1214 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1215 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
918f4159 | 1216 | || a->reversed_p != b->reversed_p |
5f5c8ee5 GM |
1217 | /* Different partially visible characters on left margin. */ |
1218 | || a->x != b->x | |
1219 | /* Different height. */ | |
1220 | || a->ascent != b->ascent | |
408f5064 GM |
1221 | || a->phys_ascent != b->phys_ascent |
1222 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1223 | || a->visible_height != b->visible_height) |
1224 | return 0; | |
1225 | } | |
1226 | ||
1227 | return 1; | |
1228 | } | |
1229 | ||
1230 | ||
1231 | \f | |
1232 | /*********************************************************************** | |
1233 | Glyph Pool | |
1234 | ||
1235 | See dispextern.h for an overall explanation of glyph pools. | |
1236 | ***********************************************************************/ | |
1237 | ||
f0b79313 DA |
1238 | /* Allocate a glyph_pool structure. The structure returned is initialized |
1239 | with zeros. If GLYPH_DEBUG and ENABLE_CHECKING are in effect, the global | |
1240 | variable glyph_pool_count is incremented for each pool allocated. */ | |
5f5c8ee5 GM |
1241 | |
1242 | static struct glyph_pool * | |
971de7fb | 1243 | new_glyph_pool (void) |
5f5c8ee5 | 1244 | { |
23f86fce | 1245 | struct glyph_pool *result = xzalloc (sizeof *result); |
177c0ea7 | 1246 | |
f0b79313 | 1247 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
5f5c8ee5 GM |
1248 | /* For memory leak and double deletion checking. */ |
1249 | ++glyph_pool_count; | |
f0b79313 | 1250 | #endif |
177c0ea7 | 1251 | |
5f5c8ee5 GM |
1252 | return result; |
1253 | } | |
1254 | ||
1255 | ||
1256 | /* Free a glyph_pool structure POOL. The function may be called with | |
f0b79313 DA |
1257 | a null POOL pointer. If GLYPH_DEBUG and ENABLE_CHECKING are in effect, |
1258 | global variable glyph_pool_count is decremented with every pool structure | |
1259 | freed. If this count gets negative, more structures were freed than | |
1260 | allocated, i.e. one structure must have been freed more than once or | |
1261 | a bogus pointer was passed to free_glyph_pool. */ | |
5f5c8ee5 GM |
1262 | |
1263 | static void | |
971de7fb | 1264 | free_glyph_pool (struct glyph_pool *pool) |
5f5c8ee5 GM |
1265 | { |
1266 | if (pool) | |
1267 | { | |
f0b79313 | 1268 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
153a073c | 1269 | /* More freed than allocated? */ |
5f5c8ee5 | 1270 | --glyph_pool_count; |
a54e2c05 | 1271 | eassert (glyph_pool_count >= 0); |
f0b79313 | 1272 | #endif |
5f5c8ee5 GM |
1273 | xfree (pool->glyphs); |
1274 | xfree (pool); | |
1275 | } | |
1276 | } | |
1277 | ||
1278 | ||
1279 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1280 | columns we need. This function never shrinks a pool. The only | |
1281 | case in which this would make sense, would be when a frame's size | |
1282 | is changed from a large value to a smaller one. But, if someone | |
1283 | does it once, we can expect that he will do it again. | |
1284 | ||
59ea14cd | 1285 | Return true if the pool changed in a way which makes |
5f5c8ee5 GM |
1286 | re-adjusting window glyph matrices necessary. */ |
1287 | ||
59ea14cd | 1288 | static bool |
971de7fb | 1289 | realloc_glyph_pool (struct glyph_pool *pool, struct dim matrix_dim) |
5f5c8ee5 | 1290 | { |
ca9ce8f2 | 1291 | ptrdiff_t needed; |
59ea14cd | 1292 | bool changed_p; |
5f5c8ee5 GM |
1293 | |
1294 | changed_p = (pool->glyphs == 0 | |
1295 | || matrix_dim.height != pool->nrows | |
1296 | || matrix_dim.width != pool->ncolumns); | |
1297 | ||
1298 | /* Enlarge the glyph pool. */ | |
ca9ce8f2 | 1299 | needed = matrix_dim.width; |
0065d054 PE |
1300 | if (INT_MULTIPLY_OVERFLOW (needed, matrix_dim.height)) |
1301 | memory_full (SIZE_MAX); | |
ca9ce8f2 | 1302 | needed *= matrix_dim.height; |
5f5c8ee5 GM |
1303 | if (needed > pool->nglyphs) |
1304 | { | |
0065d054 PE |
1305 | ptrdiff_t old_nglyphs = pool->nglyphs; |
1306 | pool->glyphs = xpalloc (pool->glyphs, &pool->nglyphs, | |
1307 | needed - old_nglyphs, -1, sizeof *pool->glyphs); | |
1308 | memset (pool->glyphs + old_nglyphs, 0, | |
1309 | (pool->nglyphs - old_nglyphs) * sizeof *pool->glyphs); | |
5f5c8ee5 GM |
1310 | } |
1311 | ||
153a073c | 1312 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1313 | to do sanity checks, and (b) the number of columns determines |
1314 | where rows in the frame matrix start---this must be available to | |
1315 | determine pointers to rows of window sub-matrices. */ | |
1316 | pool->nrows = matrix_dim.height; | |
1317 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1318 | |
5f5c8ee5 GM |
1319 | return changed_p; |
1320 | } | |
1321 | ||
1322 | ||
1323 | \f | |
1324 | /*********************************************************************** | |
1325 | Debug Code | |
1326 | ***********************************************************************/ | |
1327 | ||
e509cfa6 | 1328 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 1329 | |
a13396c9 | 1330 | |
28d440ab KL |
1331 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1332 | XXX Maybe this should be changed to flush the current terminal instead of | |
1333 | stdout. | |
1334 | */ | |
a13396c9 | 1335 | |
85fece3e PE |
1336 | void flush_stdout (void) EXTERNALLY_VISIBLE; |
1337 | ||
a13396c9 | 1338 | void |
59fc5cf9 | 1339 | flush_stdout (void) |
a13396c9 GM |
1340 | { |
1341 | fflush (stdout); | |
1342 | } | |
1343 | ||
1344 | ||
5f5c8ee5 GM |
1345 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1346 | pointer has been lost, e.g. by using a structure assignment between | |
1347 | rows, at least one pointer must occur more than once in the rows of | |
1348 | MATRIX. */ | |
1349 | ||
1350 | void | |
59fc5cf9 | 1351 | check_matrix_pointer_lossage (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
1352 | { |
1353 | int i, j; | |
177c0ea7 | 1354 | |
5f5c8ee5 GM |
1355 | for (i = 0; i < matrix->nrows; ++i) |
1356 | for (j = 0; j < matrix->nrows; ++j) | |
a54e2c05 | 1357 | eassert (i == j |
5f5c8ee5 GM |
1358 | || (matrix->rows[i].glyphs[TEXT_AREA] |
1359 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1360 | } | |
1361 | ||
1362 | ||
1363 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1364 | ||
1365 | struct glyph_row * | |
59fc5cf9 | 1366 | matrix_row (struct glyph_matrix *matrix, int row) |
5f5c8ee5 | 1367 | { |
a54e2c05 DA |
1368 | eassert (matrix && matrix->rows); |
1369 | eassert (row >= 0 && row < matrix->nrows); | |
5f5c8ee5 GM |
1370 | |
1371 | /* That's really too slow for normal testing because this function | |
1372 | is called almost everywhere. Although---it's still astonishingly | |
1373 | fast, so it is valuable to have for debugging purposes. */ | |
1374 | #if 0 | |
1375 | check_matrix_pointer_lossage (matrix); | |
1376 | #endif | |
177c0ea7 | 1377 | |
5f5c8ee5 GM |
1378 | return matrix->rows + row; |
1379 | } | |
1380 | ||
1381 | ||
1382 | #if 0 /* This function makes invalid assumptions when text is | |
1383 | partially invisible. But it might come handy for debugging | |
1384 | nevertheless. */ | |
1385 | ||
1386 | /* Check invariants that must hold for an up to date current matrix of | |
1387 | window W. */ | |
1388 | ||
1389 | static void | |
59fc5cf9 | 1390 | check_matrix_invariants (struct window *w) |
5f5c8ee5 GM |
1391 | { |
1392 | struct glyph_matrix *matrix = w->current_matrix; | |
1393 | int yb = window_text_bottom_y (w); | |
1394 | struct glyph_row *row = matrix->rows; | |
1395 | struct glyph_row *last_text_row = NULL; | |
1396 | struct buffer *saved = current_buffer; | |
e74aeda8 | 1397 | struct buffer *buffer = XBUFFER (w->contents); |
5f5c8ee5 | 1398 | int c; |
177c0ea7 | 1399 | |
5f5c8ee5 GM |
1400 | /* This can sometimes happen for a fresh window. */ |
1401 | if (matrix->nrows < 2) | |
1402 | return; | |
1403 | ||
1404 | set_buffer_temp (buffer); | |
1405 | ||
1406 | /* Note: last row is always reserved for the mode line. */ | |
1407 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1408 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1409 | { | |
1410 | struct glyph_row *next = row + 1; | |
1411 | ||
1412 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1413 | last_text_row = row; | |
1414 | ||
1415 | /* Check that character and byte positions are in sync. */ | |
a54e2c05 | 1416 | eassert (MATRIX_ROW_START_BYTEPOS (row) |
5f5c8ee5 | 1417 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); |
a54e2c05 | 1418 | eassert (BYTEPOS (row->start.pos) |
d36fe237 | 1419 | == CHAR_TO_BYTE (CHARPOS (row->start.pos))); |
5f5c8ee5 GM |
1420 | |
1421 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1422 | have such a position temporarily in case of a minibuffer | |
1423 | displaying something like `[Sole completion]' at its end. */ | |
1424 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
d36fe237 | 1425 | { |
a54e2c05 | 1426 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
d36fe237 | 1427 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); |
a54e2c05 | 1428 | eassert (BYTEPOS (row->end.pos) |
d36fe237 EZ |
1429 | == CHAR_TO_BYTE (CHARPOS (row->end.pos))); |
1430 | } | |
5f5c8ee5 GM |
1431 | |
1432 | /* Check that end position of `row' is equal to start position | |
1433 | of next row. */ | |
1434 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1435 | { | |
a54e2c05 | 1436 | eassert (MATRIX_ROW_END_CHARPOS (row) |
5f5c8ee5 | 1437 | == MATRIX_ROW_START_CHARPOS (next)); |
a54e2c05 | 1438 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
5f5c8ee5 | 1439 | == MATRIX_ROW_START_BYTEPOS (next)); |
a54e2c05 DA |
1440 | eassert (CHARPOS (row->end.pos) == CHARPOS (next->start.pos)); |
1441 | eassert (BYTEPOS (row->end.pos) == BYTEPOS (next->start.pos)); | |
5f5c8ee5 GM |
1442 | } |
1443 | row = next; | |
1444 | } | |
1445 | ||
a54e2c05 DA |
1446 | eassert (w->current_matrix->nrows == w->desired_matrix->nrows); |
1447 | eassert (w->desired_matrix->rows != NULL); | |
5f5c8ee5 GM |
1448 | set_buffer_temp (saved); |
1449 | } | |
1450 | ||
1451 | #endif /* 0 */ | |
1452 | ||
e509cfa6 | 1453 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
1454 | |
1455 | ||
1456 | \f | |
1457 | /********************************************************************** | |
1458 | Allocating/ Adjusting Glyph Matrices | |
1459 | **********************************************************************/ | |
1460 | ||
1461 | /* Allocate glyph matrices over a window tree for a frame-based | |
1462 | redisplay | |
1463 | ||
1464 | X and Y are column/row within the frame glyph matrix where | |
1465 | sub-matrices for the window tree rooted at WINDOW must be | |
59ea14cd | 1466 | allocated. DIM_ONLY_P means that the caller of this |
8ce2650d YM |
1467 | function is only interested in the result matrix dimension, and |
1468 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1469 | |
1470 | The function returns the total width/height of the sub-matrices of | |
1471 | the window tree. If called on a frame root window, the computation | |
1472 | will take the mini-buffer window into account. | |
1473 | ||
1474 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1475 | ||
1476 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1477 | glyph matrices yet, and | |
1478 | ||
1479 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1480 | any window in the tree will be changed or have been changed (see | |
153a073c | 1481 | DIM_ONLY_P) |
5f5c8ee5 GM |
1482 | |
1483 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1484 | function. | |
1485 | ||
1486 | Windows are arranged into chains of windows on the same level | |
1487 | through the next fields of window structures. Such a level can be | |
1488 | either a sequence of horizontally adjacent windows from left to | |
1489 | right, or a sequence of vertically adjacent windows from top to | |
1490 | bottom. Each window in a horizontal sequence can be either a leaf | |
1491 | window or a vertical sequence; a window in a vertical sequence can | |
1492 | be either a leaf or a horizontal sequence. All windows in a | |
1493 | horizontal sequence have the same height, and all windows in a | |
1494 | vertical sequence have the same width. | |
1495 | ||
1496 | This function uses, for historical reasons, a more general | |
1497 | algorithm to determine glyph matrix dimensions that would be | |
1498 | necessary. | |
1499 | ||
1500 | The matrix height of a horizontal sequence is determined by the | |
1501 | maximum height of any matrix in the sequence. The matrix width of | |
1502 | a horizontal sequence is computed by adding up matrix widths of | |
1503 | windows in the sequence. | |
1504 | ||
1505 | |<------- result width ------->| | |
1506 | +---------+----------+---------+ --- | |
1507 | | | | | | | |
1508 | | | | | | |
1509 | +---------+ | | result height | |
1510 | | +---------+ | |
1511 | | | | | |
1512 | +----------+ --- | |
1513 | ||
1514 | The matrix width of a vertical sequence is the maximum matrix width | |
1515 | of any window in the sequence. Its height is computed by adding up | |
1516 | matrix heights of windows in the sequence. | |
1517 | ||
1518 | |<---- result width -->| | |
1519 | +---------+ --- | |
1520 | | | | | |
1521 | | | | | |
1522 | +---------+--+ | | |
1523 | | | | | |
1524 | | | result height | |
1525 | | | | |
1526 | +------------+---------+ | | |
1527 | | | | | |
1528 | | | | | |
1529 | +------------+---------+ --- */ | |
1530 | ||
1531 | /* Bit indicating that a new matrix will be allocated or has been | |
1532 | allocated. */ | |
1533 | ||
1534 | #define NEW_LEAF_MATRIX (1 << 0) | |
1535 | ||
1536 | /* Bit indicating that a matrix will or has changed its location or | |
1537 | size. */ | |
1538 | ||
1539 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1540 | ||
1541 | static struct dim | |
6f704c76 | 1542 | allocate_matrices_for_frame_redisplay (Lisp_Object window, int x, int y, |
59ea14cd | 1543 | bool dim_only_p, int *window_change_flags) |
5f5c8ee5 GM |
1544 | { |
1545 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1546 | int x0 = x, y0 = y; | |
1547 | int wmax = 0, hmax = 0; | |
1548 | struct dim total; | |
1549 | struct dim dim; | |
1550 | struct window *w; | |
59ea14cd | 1551 | bool in_horz_combination_p; |
5f5c8ee5 GM |
1552 | |
1553 | /* What combination is WINDOW part of? Compute this once since the | |
1554 | result is the same for all windows in the `next' chain. The | |
1555 | special case of a root window (parent equal to nil) is treated | |
1556 | like a vertical combination because a root window's `next' | |
1557 | points to the mini-buffer window, if any, which is arranged | |
1558 | vertically below other windows. */ | |
1559 | in_horz_combination_p | |
d3d50620 | 1560 | = (!NILP (XWINDOW (window)->parent) |
e74aeda8 | 1561 | && WINDOW_HORIZONTAL_COMBINATION_P (XWINDOW (XWINDOW (window)->parent))); |
5f5c8ee5 GM |
1562 | |
1563 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1564 | do |
5f5c8ee5 GM |
1565 | { |
1566 | w = XWINDOW (window); | |
1567 | ||
1568 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1569 | on whether this is a combination or a leaf window. */ |
e74aeda8 DA |
1570 | if (WINDOWP (w->contents)) |
1571 | dim = allocate_matrices_for_frame_redisplay (w->contents, x, y, | |
5f5c8ee5 GM |
1572 | dim_only_p, |
1573 | window_change_flags); | |
1574 | else | |
1575 | { | |
1576 | /* If not already done, allocate sub-matrix structures. */ | |
1577 | if (w->desired_matrix == NULL) | |
1578 | { | |
1579 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1580 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1581 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1582 | } | |
177c0ea7 | 1583 | |
5f5c8ee5 GM |
1584 | /* Width and height MUST be chosen so that there are no |
1585 | holes in the frame matrix. */ | |
5d3cc43c GM |
1586 | dim.width = required_matrix_width (w); |
1587 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1588 | |
1589 | /* Will matrix be re-allocated? */ | |
1590 | if (x != w->desired_matrix->matrix_x | |
1591 | || y != w->desired_matrix->matrix_y | |
1592 | || dim.width != w->desired_matrix->matrix_w | |
1593 | || dim.height != w->desired_matrix->matrix_h | |
1594 | || (margin_glyphs_to_reserve (w, dim.width, | |
d3d50620 | 1595 | w->left_margin_cols) |
5f5c8ee5 GM |
1596 | != w->desired_matrix->left_margin_glyphs) |
1597 | || (margin_glyphs_to_reserve (w, dim.width, | |
d3d50620 | 1598 | w->right_margin_cols) |
5f5c8ee5 GM |
1599 | != w->desired_matrix->right_margin_glyphs)) |
1600 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1601 | ||
1602 | /* Actually change matrices, if allowed. Do not consider | |
1603 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1604 | may have been changed which we don't now here. We trust | |
59ea14cd | 1605 | that we only will be called with DIM_ONLY_P when |
5f5c8ee5 GM |
1606 | necessary. */ |
1607 | if (!dim_only_p) | |
1608 | { | |
1609 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1610 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1611 | } | |
1612 | } | |
1613 | ||
1614 | /* If we are part of a horizontal combination, advance x for | |
1615 | windows to the right of W; otherwise advance y for windows | |
1616 | below W. */ | |
1617 | if (in_horz_combination_p) | |
1618 | x += dim.width; | |
177c0ea7 | 1619 | else |
5f5c8ee5 GM |
1620 | y += dim.height; |
1621 | ||
1622 | /* Remember maximum glyph matrix dimensions. */ | |
1623 | wmax = max (wmax, dim.width); | |
1624 | hmax = max (hmax, dim.height); | |
1625 | ||
1626 | /* Next window on same level. */ | |
d3d50620 | 1627 | window = w->next; |
5f5c8ee5 GM |
1628 | } |
1629 | while (!NILP (window)); | |
1630 | ||
1631 | /* Set `total' to the total glyph matrix dimension of this window | |
1632 | level. In a vertical combination, the width is the width of the | |
1633 | widest window; the height is the y we finally reached, corrected | |
1634 | by the y we started with. In a horizontal combination, the total | |
1635 | height is the height of the tallest window, and the width is the | |
1636 | x we finally reached, corrected by the x we started with. */ | |
1637 | if (in_horz_combination_p) | |
1638 | { | |
1639 | total.width = x - x0; | |
1640 | total.height = hmax; | |
1641 | } | |
177c0ea7 | 1642 | else |
5f5c8ee5 GM |
1643 | { |
1644 | total.width = wmax; | |
1645 | total.height = y - y0; | |
1646 | } | |
1647 | ||
1648 | return total; | |
1649 | } | |
1650 | ||
1651 | ||
5d3cc43c GM |
1652 | /* Return the required height of glyph matrices for window W. */ |
1653 | ||
2f7c71a1 | 1654 | static int |
971de7fb | 1655 | required_matrix_height (struct window *w) |
5d3cc43c GM |
1656 | { |
1657 | #ifdef HAVE_WINDOW_SYSTEM | |
d3d50620 | 1658 | struct frame *f = XFRAME (w->frame); |
177c0ea7 | 1659 | |
5d3cc43c GM |
1660 | if (FRAME_WINDOW_P (f)) |
1661 | { | |
1662 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1ea40aa2 | 1663 | int window_pixel_height = window_box_height (w) + eabs (w->vscroll); |
880e6158 | 1664 | |
5d3cc43c | 1665 | return (((window_pixel_height + ch_height - 1) |
cc834cf9 | 1666 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
1667 | /* One partially visible line at the top and |
1668 | bottom of the window. */ | |
1669 | + 2 | |
153a073c | 1670 | /* 2 for header and mode line. */ |
5d3cc43c GM |
1671 | + 2); |
1672 | } | |
1673 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 1674 | |
7df02016 | 1675 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
1676 | } |
1677 | ||
1678 | ||
1679 | /* Return the required width of glyph matrices for window W. */ | |
1680 | ||
2f7c71a1 | 1681 | static int |
971de7fb | 1682 | required_matrix_width (struct window *w) |
5d3cc43c GM |
1683 | { |
1684 | #ifdef HAVE_WINDOW_SYSTEM | |
d3d50620 | 1685 | struct frame *f = XFRAME (w->frame); |
5d3cc43c GM |
1686 | if (FRAME_WINDOW_P (f)) |
1687 | { | |
1688 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
177c0ea7 | 1689 | |
5d3cc43c | 1690 | /* Compute number of glyphs needed in a glyph row. */ |
880e6158 | 1691 | return (((WINDOW_PIXEL_WIDTH (w) + ch_width - 1) |
cc834cf9 | 1692 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
1693 | /* 2 partially visible columns in the text area. */ |
1694 | + 2 | |
1695 | /* One partially visible column at the right | |
1696 | edge of each marginal area. */ | |
1697 | + 1 + 1); | |
1698 | } | |
1699 | #endif /* HAVE_WINDOW_SYSTEM */ | |
1700 | ||
5f24fa51 | 1701 | return w->total_cols; |
5d3cc43c GM |
1702 | } |
1703 | ||
1704 | ||
5f5c8ee5 | 1705 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 1706 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 1707 | |
5f5c8ee5 | 1708 | static void |
971de7fb | 1709 | allocate_matrices_for_window_redisplay (struct window *w) |
5f5c8ee5 | 1710 | { |
5f5c8ee5 GM |
1711 | while (w) |
1712 | { | |
e74aeda8 DA |
1713 | if (WINDOWP (w->contents)) |
1714 | allocate_matrices_for_window_redisplay (XWINDOW (w->contents)); | |
5f5c8ee5 GM |
1715 | else |
1716 | { | |
1717 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
1718 | struct dim dim; |
1719 | ||
1720 | /* If matrices are not yet allocated, allocate them now. */ | |
1721 | if (w->desired_matrix == NULL) | |
1722 | { | |
1723 | w->desired_matrix = new_glyph_matrix (NULL); | |
1724 | w->current_matrix = new_glyph_matrix (NULL); | |
1725 | } | |
1726 | ||
5d3cc43c GM |
1727 | dim.width = required_matrix_width (w); |
1728 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1729 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
1730 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
1731 | } | |
177c0ea7 | 1732 | |
d3d50620 | 1733 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
5f5c8ee5 GM |
1734 | } |
1735 | } | |
1736 | ||
bd0443bb DA |
1737 | /* Allocate/reallocate glyph matrices of a single frame F. |
1738 | This function must be called when a new frame is created, | |
1739 | its size changes, or its window configuration changes. */ | |
5f5c8ee5 GM |
1740 | |
1741 | void | |
bd0443bb | 1742 | adjust_frame_glyphs (struct frame *f) |
5f5c8ee5 | 1743 | { |
408f5064 GM |
1744 | /* Block input so that expose events and other events that access |
1745 | glyph matrices are not processed while we are changing them. */ | |
4d7e6e51 | 1746 | block_input (); |
408f5064 | 1747 | |
5f5c8ee5 GM |
1748 | if (FRAME_WINDOW_P (f)) |
1749 | adjust_frame_glyphs_for_window_redisplay (f); | |
1750 | else | |
1751 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 1752 | |
b09cca6a | 1753 | /* Don't forget the buffer for decode_mode_spec. */ |
5f5c8ee5 GM |
1754 | adjust_decode_mode_spec_buffer (f); |
1755 | ||
1756 | f->glyphs_initialized_p = 1; | |
bd0443bb DA |
1757 | |
1758 | unblock_input (); | |
5f5c8ee5 GM |
1759 | } |
1760 | ||
59ea14cd | 1761 | /* Return true if any window in the tree has nonzero window margins. See |
075757cc | 1762 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ |
59ea14cd | 1763 | static bool |
971de7fb | 1764 | showing_window_margins_p (struct window *w) |
075757cc CY |
1765 | { |
1766 | while (w) | |
1767 | { | |
e74aeda8 | 1768 | if (WINDOWP (w->contents)) |
075757cc | 1769 | { |
e74aeda8 | 1770 | if (showing_window_margins_p (XWINDOW (w->contents))) |
075757cc CY |
1771 | return 1; |
1772 | } | |
eeaf9bf3 | 1773 | else if (w->left_margin_cols > 0 || w->right_margin_cols > 0) |
075757cc | 1774 | return 1; |
3fc809e2 | 1775 | |
d3d50620 | 1776 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
075757cc CY |
1777 | } |
1778 | return 0; | |
1779 | } | |
1780 | ||
5f5c8ee5 | 1781 | |
c9f00270 GM |
1782 | /* In the window tree with root W, build current matrices of leaf |
1783 | windows from the frame's current matrix. */ | |
1784 | ||
1785 | static void | |
971de7fb | 1786 | fake_current_matrices (Lisp_Object window) |
c9f00270 GM |
1787 | { |
1788 | struct window *w; | |
177c0ea7 | 1789 | |
d3d50620 | 1790 | for (; !NILP (window); window = w->next) |
c9f00270 GM |
1791 | { |
1792 | w = XWINDOW (window); | |
177c0ea7 | 1793 | |
e74aeda8 DA |
1794 | if (WINDOWP (w->contents)) |
1795 | fake_current_matrices (w->contents); | |
c9f00270 GM |
1796 | else |
1797 | { | |
1798 | int i; | |
d3d50620 | 1799 | struct frame *f = XFRAME (w->frame); |
c9f00270 GM |
1800 | struct glyph_matrix *m = w->current_matrix; |
1801 | struct glyph_matrix *fm = f->current_matrix; | |
1802 | ||
a54e2c05 DA |
1803 | eassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
1804 | eassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 1805 | |
c9f00270 GM |
1806 | for (i = 0; i < m->matrix_h; ++i) |
1807 | { | |
1808 | struct glyph_row *r = m->rows + i; | |
7df02016 | 1809 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 | 1810 | |
a54e2c05 | 1811 | eassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] |
c9f00270 GM |
1812 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); |
1813 | ||
1814 | r->enabled_p = fr->enabled_p; | |
1815 | if (r->enabled_p) | |
1816 | { | |
1817 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
1818 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
1819 | r->used[TEXT_AREA] = (m->matrix_w | |
1820 | - r->used[LEFT_MARGIN_AREA] | |
1821 | - r->used[RIGHT_MARGIN_AREA]); | |
1822 | r->mode_line_p = 0; | |
c9f00270 GM |
1823 | } |
1824 | } | |
1825 | } | |
1826 | } | |
1827 | } | |
1828 | ||
1829 | ||
bccee4f2 | 1830 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 1831 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 1832 | |
bccee4f2 | 1833 | static struct glyph_matrix * |
971de7fb | 1834 | save_current_matrix (struct frame *f) |
c9f00270 | 1835 | { |
bccee4f2 | 1836 | int i; |
38182d90 | 1837 | struct glyph_matrix *saved = xzalloc (sizeof *saved); |
bccee4f2 | 1838 | saved->nrows = f->current_matrix->nrows; |
23f86fce | 1839 | saved->rows = xzalloc (saved->nrows * sizeof *saved->rows); |
bccee4f2 GM |
1840 | |
1841 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 1842 | { |
bccee4f2 GM |
1843 | struct glyph_row *from = f->current_matrix->rows + i; |
1844 | struct glyph_row *to = saved->rows + i; | |
dfd153ae | 1845 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
141f1ff7 | 1846 | |
23f86fce | 1847 | to->glyphs[TEXT_AREA] = xmalloc (nbytes); |
72af86bd | 1848 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
bccee4f2 | 1849 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
fa93733d EZ |
1850 | to->enabled_p = from->enabled_p; |
1851 | to->hash = from->hash; | |
141f1ff7 EZ |
1852 | if (from->used[LEFT_MARGIN_AREA]) |
1853 | { | |
1854 | nbytes = from->used[LEFT_MARGIN_AREA] * sizeof (struct glyph); | |
3b158d11 | 1855 | to->glyphs[LEFT_MARGIN_AREA] = xmalloc (nbytes); |
141f1ff7 EZ |
1856 | memcpy (to->glyphs[LEFT_MARGIN_AREA], |
1857 | from->glyphs[LEFT_MARGIN_AREA], nbytes); | |
1858 | to->used[LEFT_MARGIN_AREA] = from->used[LEFT_MARGIN_AREA]; | |
1859 | } | |
1860 | if (from->used[RIGHT_MARGIN_AREA]) | |
1861 | { | |
1862 | nbytes = from->used[RIGHT_MARGIN_AREA] * sizeof (struct glyph); | |
3b158d11 | 1863 | to->glyphs[RIGHT_MARGIN_AREA] = xmalloc (nbytes); |
141f1ff7 EZ |
1864 | memcpy (to->glyphs[RIGHT_MARGIN_AREA], |
1865 | from->glyphs[RIGHT_MARGIN_AREA], nbytes); | |
1866 | to->used[RIGHT_MARGIN_AREA] = from->used[RIGHT_MARGIN_AREA]; | |
1867 | } | |
e797dea6 | 1868 | } |
bccee4f2 GM |
1869 | |
1870 | return saved; | |
1871 | } | |
1872 | ||
1873 | ||
1874 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
1875 | and free memory associated with SAVED. */ | |
1876 | ||
1877 | static void | |
971de7fb | 1878 | restore_current_matrix (struct frame *f, struct glyph_matrix *saved) |
bccee4f2 GM |
1879 | { |
1880 | int i; | |
1881 | ||
1882 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 1883 | { |
bccee4f2 GM |
1884 | struct glyph_row *from = saved->rows + i; |
1885 | struct glyph_row *to = f->current_matrix->rows + i; | |
dfd153ae | 1886 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
141f1ff7 | 1887 | |
72af86bd | 1888 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
e797dea6 | 1889 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
bccee4f2 | 1890 | xfree (from->glyphs[TEXT_AREA]); |
2fa833da | 1891 | nbytes = from->used[LEFT_MARGIN_AREA] * sizeof (struct glyph); |
141f1ff7 EZ |
1892 | if (nbytes) |
1893 | { | |
1894 | memcpy (to->glyphs[LEFT_MARGIN_AREA], | |
1895 | from->glyphs[LEFT_MARGIN_AREA], nbytes); | |
1896 | to->used[LEFT_MARGIN_AREA] = from->used[LEFT_MARGIN_AREA]; | |
1897 | xfree (from->glyphs[LEFT_MARGIN_AREA]); | |
1898 | } | |
1899 | else | |
1900 | to->used[LEFT_MARGIN_AREA] = 0; | |
2fa833da | 1901 | nbytes = from->used[RIGHT_MARGIN_AREA] * sizeof (struct glyph); |
141f1ff7 EZ |
1902 | if (nbytes) |
1903 | { | |
1904 | memcpy (to->glyphs[RIGHT_MARGIN_AREA], | |
1905 | from->glyphs[RIGHT_MARGIN_AREA], nbytes); | |
1906 | to->used[RIGHT_MARGIN_AREA] = from->used[RIGHT_MARGIN_AREA]; | |
1907 | xfree (from->glyphs[RIGHT_MARGIN_AREA]); | |
1908 | } | |
1909 | else | |
1910 | to->used[RIGHT_MARGIN_AREA] = 0; | |
e797dea6 | 1911 | } |
177c0ea7 | 1912 | |
bccee4f2 GM |
1913 | xfree (saved->rows); |
1914 | xfree (saved); | |
c9f00270 GM |
1915 | } |
1916 | ||
1917 | ||
bccee4f2 | 1918 | |
5f5c8ee5 GM |
1919 | /* Allocate/reallocate glyph matrices of a single frame F for |
1920 | frame-based redisplay. */ | |
1921 | ||
1922 | static void | |
971de7fb | 1923 | adjust_frame_glyphs_for_frame_redisplay (struct frame *f) |
5f5c8ee5 | 1924 | { |
5f5c8ee5 | 1925 | struct dim matrix_dim; |
59ea14cd | 1926 | bool pool_changed_p; |
5f5c8ee5 GM |
1927 | int window_change_flags; |
1928 | int top_window_y; | |
1929 | ||
1930 | if (!FRAME_LIVE_P (f)) | |
1931 | return; | |
1932 | ||
5f5c8ee5 GM |
1933 | top_window_y = FRAME_TOP_MARGIN (f); |
1934 | ||
1935 | /* Allocate glyph pool structures if not already done. */ | |
1936 | if (f->desired_pool == NULL) | |
1937 | { | |
1938 | f->desired_pool = new_glyph_pool (); | |
1939 | f->current_pool = new_glyph_pool (); | |
1940 | } | |
1941 | ||
1942 | /* Allocate frames matrix structures if needed. */ | |
1943 | if (f->desired_matrix == NULL) | |
1944 | { | |
1945 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1946 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
1947 | } | |
177c0ea7 | 1948 | |
5f5c8ee5 GM |
1949 | /* Compute window glyph matrices. (This takes the mini-buffer |
1950 | window into account). The result is the size of the frame glyph | |
1951 | matrix needed. The variable window_change_flags is set to a bit | |
1952 | mask indicating whether new matrices will be allocated or | |
1953 | existing matrices change their size or location within the frame | |
1954 | matrix. */ | |
1955 | window_change_flags = 0; | |
1956 | matrix_dim | |
1957 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
1958 | 0, top_window_y, | |
5d3cc43c | 1959 | 1, |
5f5c8ee5 GM |
1960 | &window_change_flags); |
1961 | ||
1962 | /* Add in menu bar lines, if any. */ | |
1963 | matrix_dim.height += top_window_y; | |
1964 | ||
1965 | /* Enlarge pools as necessary. */ | |
1966 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
1967 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
1968 | ||
177c0ea7 | 1969 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
1970 | absolutely necessary since it requires a frame redraw. */ |
1971 | if (pool_changed_p || window_change_flags) | |
1972 | { | |
1973 | /* Do it for window matrices. */ | |
1974 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 1975 | 0, top_window_y, 0, |
5f5c8ee5 GM |
1976 | &window_change_flags); |
1977 | ||
1978 | /* Size of frame matrices must equal size of frame. Note | |
1979 | that we are called for X frames with window widths NOT equal | |
1980 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
880e6158 MR |
1981 | if (matrix_dim.width != FRAME_COLS (f) |
1982 | || matrix_dim.height != FRAME_LINES (f)) | |
1983 | return; | |
1984 | ||
a54e2c05 | 1985 | eassert (matrix_dim.width == FRAME_COLS (f) |
7df02016 | 1986 | && matrix_dim.height == FRAME_LINES (f)); |
177c0ea7 | 1987 | |
e797dea6 GM |
1988 | /* Pointers to glyph memory in glyph rows are exchanged during |
1989 | the update phase of redisplay, which means in general that a | |
1990 | frame's current matrix consists of pointers into both the | |
1991 | desired and current glyph pool of the frame. Adjusting a | |
1992 | matrix sets the frame matrix up so that pointers are all into | |
1993 | the same pool. If we want to preserve glyph contents of the | |
1994 | current matrix over a call to adjust_glyph_matrix, we must | |
1995 | make a copy of the current glyphs, and restore the current | |
1996 | matrix' contents from that copy. */ | |
1997 | if (display_completed | |
1998 | && !FRAME_GARBAGED_P (f) | |
1999 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
2000 | && matrix_dim.height == f->current_matrix->matrix_h |
2001 | /* For some reason, the frame glyph matrix gets corrupted if | |
2002 | any of the windows contain margins. I haven't been able | |
2003 | to hunt down the reason, but for the moment this prevents | |
2004 | the problem from manifesting. -- cyd */ | |
d5c20fe8 | 2005 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) |
e797dea6 | 2006 | { |
bccee4f2 GM |
2007 | struct glyph_matrix *copy = save_current_matrix (f); |
2008 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2009 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2010 | restore_current_matrix (f, copy); |
e797dea6 GM |
2011 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2012 | } | |
c9f00270 | 2013 | else |
e797dea6 | 2014 | { |
bccee4f2 | 2015 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2016 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2017 | SET_FRAME_GARBAGED (f); | |
2018 | } | |
5f5c8ee5 GM |
2019 | } |
2020 | } | |
2021 | ||
2022 | ||
2023 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2024 | window-based redisplay. */ | |
2025 | ||
2026 | static void | |
971de7fb | 2027 | adjust_frame_glyphs_for_window_redisplay (struct frame *f) |
5f5c8ee5 | 2028 | { |
a54e2c05 | 2029 | eassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); |
177c0ea7 | 2030 | |
5f5c8ee5 | 2031 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2032 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2033 | |
742516e0 | 2034 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2035 | /* Allocate/ reallocate matrices of the dummy window used to display |
2036 | the menu bar under X when no X toolkit support is available. */ | |
5f5c8ee5 GM |
2037 | { |
2038 | /* Allocate a dummy window if not already done. */ | |
d2d37ddc | 2039 | struct window *w; |
e69b0960 | 2040 | if (NILP (f->menu_bar_window)) |
5f5c8ee5 | 2041 | { |
077288cf | 2042 | Lisp_Object frame; |
f00af5b1 | 2043 | fset_menu_bar_window (f, make_window ()); |
e69b0960 | 2044 | w = XWINDOW (f->menu_bar_window); |
077288cf | 2045 | XSETFRAME (frame, f); |
e8c17b81 | 2046 | wset_frame (w, frame); |
5f5c8ee5 GM |
2047 | w->pseudo_window_p = 1; |
2048 | } | |
2049 | else | |
e69b0960 | 2050 | w = XWINDOW (f->menu_bar_window); |
5f5c8ee5 GM |
2051 | |
2052 | /* Set window dimensions to frame dimensions and allocate or | |
2053 | adjust glyph matrices of W. */ | |
880e6158 | 2054 | w->pixel_left = 0; |
5f24fa51 | 2055 | w->left_col = 0; |
880e6158 MR |
2056 | w->pixel_top = 0; |
2057 | w->top_line = 0; | |
2058 | w->pixel_width = FRAME_PIXEL_WIDTH (f); | |
5f24fa51 | 2059 | w->total_cols = FRAME_TOTAL_COLS (f); |
880e6158 MR |
2060 | w->pixel_height = FRAME_MENU_BAR_HEIGHT (f); |
2061 | w->total_lines = FRAME_MENU_BAR_LINES (f); | |
5d3cc43c | 2062 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2063 | } |
742516e0 | 2064 | #endif |
5f5c8ee5 | 2065 | |
742516e0 | 2066 | #if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS) |
d2d37ddc PE |
2067 | { |
2068 | /* Allocate/ reallocate matrices of the tool bar window. If we | |
2069 | don't have a tool bar window yet, make one. */ | |
2070 | struct window *w; | |
e69b0960 | 2071 | if (NILP (f->tool_bar_window)) |
d2d37ddc | 2072 | { |
077288cf | 2073 | Lisp_Object frame; |
f00af5b1 | 2074 | fset_tool_bar_window (f, make_window ()); |
e69b0960 | 2075 | w = XWINDOW (f->tool_bar_window); |
077288cf | 2076 | XSETFRAME (frame, f); |
e8c17b81 | 2077 | wset_frame (w, frame); |
d2d37ddc PE |
2078 | w->pseudo_window_p = 1; |
2079 | } | |
2080 | else | |
e69b0960 | 2081 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2082 | |
880e6158 | 2083 | w->pixel_left = 0; |
5f24fa51 | 2084 | w->left_col = 0; |
880e6158 MR |
2085 | w->pixel_top = FRAME_MENU_BAR_HEIGHT (f); |
2086 | w->top_line = FRAME_MENU_BAR_LINES (f); | |
2087 | w->pixel_width = (FRAME_PIXEL_WIDTH (f) | |
2088 | - 2 * FRAME_INTERNAL_BORDER_WIDTH (f)); | |
5f24fa51 | 2089 | w->total_cols = FRAME_TOTAL_COLS (f); |
880e6158 MR |
2090 | w->pixel_height = FRAME_TOOL_BAR_HEIGHT (f); |
2091 | w->total_lines = FRAME_TOOL_BAR_LINES (f); | |
d2d37ddc PE |
2092 | allocate_matrices_for_window_redisplay (w); |
2093 | } | |
488dd4c4 | 2094 | #endif |
5f5c8ee5 GM |
2095 | } |
2096 | ||
2097 | ||
5f5c8ee5 GM |
2098 | /* Re-allocate buffer for decode_mode_spec on frame F. */ |
2099 | ||
2100 | static void | |
971de7fb | 2101 | adjust_decode_mode_spec_buffer (struct frame *f) |
5f5c8ee5 | 2102 | { |
38182d90 PE |
2103 | f->decode_mode_spec_buffer = xrealloc (f->decode_mode_spec_buffer, |
2104 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
5f5c8ee5 GM |
2105 | } |
2106 | ||
2107 | ||
2108 | \f | |
2109 | /********************************************************************** | |
2110 | Freeing Glyph Matrices | |
2111 | **********************************************************************/ | |
2112 | ||
2113 | /* Free glyph memory for a frame F. F may be null. This function can | |
2114 | be called for the same frame more than once. The root window of | |
2115 | F may be nil when this function is called. This is the case when | |
2116 | the function is called when F is destroyed. */ | |
2117 | ||
2118 | void | |
971de7fb | 2119 | free_glyphs (struct frame *f) |
5f5c8ee5 GM |
2120 | { |
2121 | if (f && f->glyphs_initialized_p) | |
2122 | { | |
42f55fe0 GM |
2123 | /* Block interrupt input so that we don't get surprised by an X |
2124 | event while we're in an inconsistent state. */ | |
4d7e6e51 | 2125 | block_input (); |
5f5c8ee5 | 2126 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2127 | |
5f5c8ee5 | 2128 | /* Release window sub-matrices. */ |
e69b0960 DA |
2129 | if (!NILP (f->root_window)) |
2130 | free_window_matrices (XWINDOW (f->root_window)); | |
5f5c8ee5 | 2131 | |
5a49b79c | 2132 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2133 | /* Free the dummy window for menu bars without X toolkit and its |
2134 | glyph matrices. */ | |
e69b0960 | 2135 | if (!NILP (f->menu_bar_window)) |
5f5c8ee5 | 2136 | { |
e69b0960 | 2137 | struct window *w = XWINDOW (f->menu_bar_window); |
5f5c8ee5 GM |
2138 | free_glyph_matrix (w->desired_matrix); |
2139 | free_glyph_matrix (w->current_matrix); | |
2140 | w->desired_matrix = w->current_matrix = NULL; | |
f00af5b1 | 2141 | fset_menu_bar_window (f, Qnil); |
5f5c8ee5 | 2142 | } |
5a49b79c | 2143 | #endif |
5f5c8ee5 | 2144 | |
742516e0 | 2145 | #if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS) |
9ea173e8 | 2146 | /* Free the tool bar window and its glyph matrices. */ |
e69b0960 | 2147 | if (!NILP (f->tool_bar_window)) |
5f5c8ee5 | 2148 | { |
e69b0960 | 2149 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2150 | free_glyph_matrix (w->desired_matrix); |
2151 | free_glyph_matrix (w->current_matrix); | |
2152 | w->desired_matrix = w->current_matrix = NULL; | |
f00af5b1 | 2153 | fset_tool_bar_window (f, Qnil); |
5f5c8ee5 | 2154 | } |
742516e0 | 2155 | #endif |
5f5c8ee5 GM |
2156 | |
2157 | /* Release frame glyph matrices. Reset fields to zero in | |
2158 | case we are called a second time. */ | |
2159 | if (f->desired_matrix) | |
2160 | { | |
2161 | free_glyph_matrix (f->desired_matrix); | |
2162 | free_glyph_matrix (f->current_matrix); | |
2163 | f->desired_matrix = f->current_matrix = NULL; | |
2164 | } | |
2165 | ||
2166 | /* Release glyph pools. */ | |
2167 | if (f->desired_pool) | |
2168 | { | |
2169 | free_glyph_pool (f->desired_pool); | |
2170 | free_glyph_pool (f->current_pool); | |
2171 | f->desired_pool = f->current_pool = NULL; | |
2172 | } | |
177c0ea7 | 2173 | |
4d7e6e51 | 2174 | unblock_input (); |
5f5c8ee5 GM |
2175 | } |
2176 | } | |
2177 | ||
2178 | ||
2179 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2180 | function may be called with a null pointer, and it may be called on | |
2181 | the same tree more than once. */ | |
2182 | ||
2183 | void | |
971de7fb | 2184 | free_window_matrices (struct window *w) |
5f5c8ee5 GM |
2185 | { |
2186 | while (w) | |
2187 | { | |
e74aeda8 DA |
2188 | if (WINDOWP (w->contents)) |
2189 | free_window_matrices (XWINDOW (w->contents)); | |
177c0ea7 | 2190 | else |
5f5c8ee5 GM |
2191 | { |
2192 | /* This is a leaf window. Free its memory and reset fields | |
2193 | to zero in case this function is called a second time for | |
2194 | W. */ | |
2195 | free_glyph_matrix (w->current_matrix); | |
2196 | free_glyph_matrix (w->desired_matrix); | |
2197 | w->current_matrix = w->desired_matrix = NULL; | |
2198 | } | |
2199 | ||
2200 | /* Next window on same level. */ | |
d3d50620 | 2201 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2202 | } |
2203 | } | |
2204 | ||
2205 | ||
2206 | /* Check glyph memory leaks. This function is called from | |
2207 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2208 | exits. We therefore free all glyph memory for all active frames | |
2209 | explicitly and check that nothing is left allocated. */ | |
2210 | ||
2211 | void | |
971de7fb | 2212 | check_glyph_memory (void) |
5f5c8ee5 GM |
2213 | { |
2214 | Lisp_Object tail, frame; | |
2215 | ||
2216 | /* Free glyph memory for all frames. */ | |
2217 | FOR_EACH_FRAME (tail, frame) | |
2218 | free_glyphs (XFRAME (frame)); | |
2219 | ||
f0b79313 | 2220 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
5f5c8ee5 | 2221 | /* Check that nothing is left allocated. */ |
f0b79313 DA |
2222 | eassert (glyph_matrix_count == 0); |
2223 | eassert (glyph_pool_count == 0); | |
2224 | #endif | |
5f5c8ee5 GM |
2225 | } |
2226 | ||
2227 | ||
2228 | \f | |
2229 | /********************************************************************** | |
2230 | Building a Frame Matrix | |
2231 | **********************************************************************/ | |
2232 | ||
2233 | /* Most of the redisplay code works on glyph matrices attached to | |
2234 | windows. This is a good solution most of the time, but it is not | |
2235 | suitable for terminal code. Terminal output functions cannot rely | |
2236 | on being able to set an arbitrary terminal window. Instead they | |
2237 | must be provided with a view of the whole frame, i.e. the whole | |
2238 | screen. We build such a view by constructing a frame matrix from | |
2239 | window matrices in this section. | |
2240 | ||
65620264 | 2241 | Windows that must be updated have their must_be_updated_p flag set. |
5f5c8ee5 GM |
2242 | For all such windows, their desired matrix is made part of the |
2243 | desired frame matrix. For other windows, their current matrix is | |
2244 | made part of the desired frame matrix. | |
2245 | ||
2246 | +-----------------+----------------+ | |
2247 | | desired | desired | | |
2248 | | | | | |
2249 | +-----------------+----------------+ | |
2250 | | current | | |
2251 | | | | |
2252 | +----------------------------------+ | |
2253 | ||
2254 | Desired window matrices can be made part of the frame matrix in a | |
2255 | cheap way: We exploit the fact that the desired frame matrix and | |
2256 | desired window matrices share their glyph memory. This is not | |
2257 | possible for current window matrices. Their glyphs are copied to | |
2258 | the desired frame matrix. The latter is equivalent to | |
2259 | preserve_other_columns in the old redisplay. | |
2260 | ||
2261 | Used glyphs counters for frame matrix rows are the result of adding | |
2262 | up glyph lengths of the window matrices. A line in the frame | |
2263 | matrix is enabled, if a corresponding line in a window matrix is | |
2264 | enabled. | |
177c0ea7 | 2265 | |
5f5c8ee5 GM |
2266 | After building the desired frame matrix, it will be passed to |
2267 | terminal code, which will manipulate both the desired and current | |
2268 | frame matrix. Changes applied to the frame's current matrix have | |
2269 | to be visible in current window matrices afterwards, of course. | |
2270 | ||
2271 | This problem is solved like this: | |
2272 | ||
2273 | 1. Window and frame matrices share glyphs. Window matrices are | |
2274 | constructed in a way that their glyph contents ARE the glyph | |
2275 | contents needed in a frame matrix. Thus, any modification of | |
2276 | glyphs done in terminal code will be reflected in window matrices | |
2277 | automatically. | |
177c0ea7 | 2278 | |
5f5c8ee5 GM |
2279 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2280 | intercepted by hook functions so that corresponding row operations | |
2281 | on window matrices can be performed. This is necessary because we | |
2282 | use pointers to glyphs in glyph row structures. To satisfy the | |
2283 | assumption of point 1 above that glyphs are updated implicitly in | |
2284 | window matrices when they are manipulated via the frame matrix, | |
2285 | window and frame matrix must of course agree where to find the | |
2286 | glyphs for their rows. Possible manipulations that must be | |
2287 | mirrored are assignments of rows of the desired frame matrix to the | |
2288 | current frame matrix and scrolling the current frame matrix. */ | |
2289 | ||
2290 | /* Build frame F's desired matrix from window matrices. Only windows | |
2291 | which have the flag must_be_updated_p set have to be updated. Menu | |
2292 | bar lines of a frame are not covered by window matrices, so make | |
2293 | sure not to touch them in this function. */ | |
2294 | ||
2295 | static void | |
971de7fb | 2296 | build_frame_matrix (struct frame *f) |
5f5c8ee5 GM |
2297 | { |
2298 | int i; | |
2299 | ||
2300 | /* F must have a frame matrix when this function is called. */ | |
a54e2c05 | 2301 | eassert (!FRAME_WINDOW_P (f)); |
177c0ea7 | 2302 | |
5f5c8ee5 GM |
2303 | /* Clear all rows in the frame matrix covered by window matrices. |
2304 | Menu bar lines are not covered by windows. */ | |
2305 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2306 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2307 | ||
2308 | /* Build the matrix by walking the window tree. */ | |
2309 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2310 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2311 | } | |
2312 | ||
2313 | ||
2314 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2315 | matrices. W is the root of a window tree. */ | |
2316 | ||
2317 | static void | |
971de7fb | 2318 | build_frame_matrix_from_window_tree (struct glyph_matrix *matrix, struct window *w) |
5f5c8ee5 GM |
2319 | { |
2320 | while (w) | |
2321 | { | |
e74aeda8 DA |
2322 | if (WINDOWP (w->contents)) |
2323 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->contents)); | |
5f5c8ee5 GM |
2324 | else |
2325 | build_frame_matrix_from_leaf_window (matrix, w); | |
2326 | ||
d3d50620 | 2327 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2328 | } |
2329 | } | |
2330 | ||
2331 | ||
2332 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2333 | desired frame matrix built. W is a leaf window whose desired or | |
2334 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2335 | must_be_updated_p determines which matrix it contributes to | |
59ea14cd | 2336 | FRAME_MATRIX. If W->must_be_updated_p, W's desired matrix |
5f5c8ee5 GM |
2337 | is added to FRAME_MATRIX, otherwise W's current matrix is added. |
2338 | Adding a desired matrix means setting up used counters and such in | |
2339 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2340 | means copying glyphs. The latter case corresponds to | |
2341 | preserve_other_columns in the old redisplay. */ | |
2342 | ||
2343 | static void | |
971de7fb | 2344 | build_frame_matrix_from_leaf_window (struct glyph_matrix *frame_matrix, struct window *w) |
5f5c8ee5 GM |
2345 | { |
2346 | struct glyph_matrix *window_matrix; | |
2347 | int window_y, frame_y; | |
2348 | /* If non-zero, a glyph to insert at the right border of W. */ | |
3fc809e2 KS |
2349 | GLYPH right_border_glyph; |
2350 | ||
2351 | SET_GLYPH_FROM_CHAR (right_border_glyph, 0); | |
5f5c8ee5 GM |
2352 | |
2353 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2354 | if (w->must_be_updated_p) | |
2355 | { | |
2356 | window_matrix = w->desired_matrix; | |
2357 | ||
2358 | /* Decide whether we want to add a vertical border glyph. */ | |
2359 | if (!WINDOW_RIGHTMOST_P (w)) | |
2360 | { | |
2361 | struct Lisp_Char_Table *dp = window_display_table (w); | |
3fc809e2 | 2362 | Lisp_Object gc; |
b4e49aee | 2363 | |
3fc809e2 KS |
2364 | SET_GLYPH_FROM_CHAR (right_border_glyph, '|'); |
2365 | if (dp | |
d311d28c | 2366 | && (gc = DISP_BORDER_GLYPH (dp), GLYPH_CODE_P (gc))) |
3fc809e2 KS |
2367 | { |
2368 | SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph, gc); | |
2369 | spec_glyph_lookup_face (w, &right_border_glyph); | |
2370 | } | |
b4e49aee | 2371 | |
3fc809e2 KS |
2372 | if (GLYPH_FACE (right_border_glyph) <= 0) |
2373 | SET_GLYPH_FACE (right_border_glyph, VERTICAL_BORDER_FACE_ID); | |
5f5c8ee5 GM |
2374 | } |
2375 | } | |
2376 | else | |
2377 | window_matrix = w->current_matrix; | |
2378 | ||
2379 | /* For all rows in the window matrix and corresponding rows in the | |
2380 | frame matrix. */ | |
2381 | window_y = 0; | |
2382 | frame_y = window_matrix->matrix_y; | |
2383 | while (window_y < window_matrix->nrows) | |
2384 | { | |
2385 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2386 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
59ea14cd | 2387 | bool current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2388 | |
2389 | /* Fill up the frame row with spaces up to the left margin of the | |
2390 | window row. */ | |
2391 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2392 | ||
2393 | /* Fill up areas in the window matrix row with spaces. */ | |
2394 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2395 | |
2396 | /* If only part of W's desired matrix has been built, and | |
2397 | window_row wasn't displayed, use the corresponding current | |
2398 | row instead. */ | |
2399 | if (window_matrix == w->desired_matrix | |
2400 | && !window_row->enabled_p) | |
2401 | { | |
2402 | window_row = w->current_matrix->rows + window_y; | |
2403 | current_row_p = 1; | |
2404 | } | |
177c0ea7 | 2405 | |
2a8bd25f | 2406 | if (current_row_p) |
5f5c8ee5 | 2407 | { |
2a8bd25f | 2408 | /* Copy window row to frame row. */ |
72af86bd AS |
2409 | memcpy (frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, |
2410 | window_row->glyphs[0], | |
2411 | window_matrix->matrix_w * sizeof (struct glyph)); | |
5f5c8ee5 GM |
2412 | } |
2413 | else | |
2414 | { | |
a54e2c05 | 2415 | eassert (window_row->enabled_p); |
177c0ea7 | 2416 | |
2a8bd25f GM |
2417 | /* Only when a desired row has been displayed, we want |
2418 | the corresponding frame row to be updated. */ | |
96c06863 | 2419 | frame_row->enabled_p = true; |
177c0ea7 | 2420 | |
5f5c8ee5 GM |
2421 | /* Maybe insert a vertical border between horizontally adjacent |
2422 | windows. */ | |
3fc809e2 | 2423 | if (GLYPH_CHAR (right_border_glyph) != 0) |
5f5c8ee5 GM |
2424 | { |
2425 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2426 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2427 | } | |
2428 | ||
e509cfa6 | 2429 | #ifdef GLYPH_DEBUG |
a13396c9 GM |
2430 | /* Window row window_y must be a slice of frame row |
2431 | frame_y. */ | |
a54e2c05 | 2432 | eassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2433 | |
5f5c8ee5 GM |
2434 | /* If rows are in sync, we don't have to copy glyphs because |
2435 | frame and window share glyphs. */ | |
177c0ea7 | 2436 | |
a38634ff | 2437 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2438 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2439 | #endif |
5f5c8ee5 GM |
2440 | } |
2441 | ||
2442 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2443 | up with spaces, and visit leaf windows from left to right it | |
2444 | can be done simply. */ | |
177c0ea7 | 2445 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2446 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2447 | ||
5f5c8ee5 GM |
2448 | /* Next row. */ |
2449 | ++window_y; | |
2450 | ++frame_y; | |
2451 | } | |
2452 | } | |
2453 | ||
5f81871e RS |
2454 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2455 | ID, return a glyph that has a realized face ID. | |
2456 | This is used for glyphs displayed specially and not part of the text; | |
2457 | for instance, vertical separators, truncation markers, etc. */ | |
2458 | ||
3fc809e2 | 2459 | void |
971de7fb | 2460 | spec_glyph_lookup_face (struct window *w, GLYPH *glyph) |
5f81871e | 2461 | { |
3fc809e2 | 2462 | int lface_id = GLYPH_FACE (*glyph); |
5f81871e RS |
2463 | /* Convert the glyph's specified face to a realized (cache) face. */ |
2464 | if (lface_id > 0) | |
2465 | { | |
d3d50620 | 2466 | int face_id = merge_faces (XFRAME (w->frame), |
5f81871e | 2467 | Qt, lface_id, DEFAULT_FACE_ID); |
3fc809e2 | 2468 | SET_GLYPH_FACE (*glyph, face_id); |
5f81871e | 2469 | } |
5f81871e | 2470 | } |
5f5c8ee5 GM |
2471 | |
2472 | /* Add spaces to a glyph row ROW in a window matrix. | |
2473 | ||
2474 | Each row has the form: | |
2475 | ||
2476 | +---------+-----------------------------+------------+ | |
2477 | | left | text | right | | |
2478 | +---------+-----------------------------+------------+ | |
2479 | ||
2480 | Left and right marginal areas are optional. This function adds | |
2481 | spaces to areas so that there are no empty holes between areas. | |
2482 | In other words: If the right area is not empty, the text area | |
2483 | is filled up with spaces up to the right area. If the text area | |
2484 | is not empty, the left area is filled up. | |
2485 | ||
2486 | To be called for frame-based redisplay, only. */ | |
2487 | ||
2488 | static void | |
971de7fb | 2489 | fill_up_glyph_row_with_spaces (struct glyph_row *row) |
5f5c8ee5 GM |
2490 | { |
2491 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2492 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2493 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2494 | } | |
2495 | ||
2496 | ||
2497 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2498 | frame-based redisplay only. */ | |
2499 | ||
2500 | static void | |
971de7fb | 2501 | fill_up_glyph_row_area_with_spaces (struct glyph_row *row, int area) |
5f5c8ee5 GM |
2502 | { |
2503 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2504 | { | |
2505 | struct glyph *end = row->glyphs[area + 1]; | |
2506 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2507 | ||
2508 | while (text < end) | |
2509 | *text++ = space_glyph; | |
2510 | row->used[area] = text - row->glyphs[area]; | |
2511 | } | |
2512 | } | |
2513 | ||
2514 | ||
2515 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2516 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2517 | ||
abe02020 | 2518 | void |
971de7fb | 2519 | fill_up_frame_row_with_spaces (struct glyph_row *row, int upto) |
5f5c8ee5 GM |
2520 | { |
2521 | int i = row->used[TEXT_AREA]; | |
2522 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2523 | |
5f5c8ee5 GM |
2524 | while (i < upto) |
2525 | glyph[i++] = space_glyph; | |
2526 | ||
2527 | row->used[TEXT_AREA] = i; | |
2528 | } | |
2529 | ||
2530 | ||
2531 | \f | |
2532 | /********************************************************************** | |
2533 | Mirroring operations on frame matrices in window matrices | |
2534 | **********************************************************************/ | |
2535 | ||
2536 | /* Set frame being updated via frame-based redisplay to F. This | |
2537 | function must be called before updates to make explicit that we are | |
2538 | working on frame matrices or not. */ | |
2539 | ||
b0ab8123 | 2540 | static void |
971de7fb | 2541 | set_frame_matrix_frame (struct frame *f) |
5f5c8ee5 GM |
2542 | { |
2543 | frame_matrix_frame = f; | |
2544 | } | |
2545 | ||
2546 | ||
2547 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2548 | DESIRED_MATRIX is the desired matrix corresponding to | |
2549 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2550 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2551 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2552 | done in frame matrices, and that we have to perform analogous | |
2553 | operations in window matrices of frame_matrix_frame. */ | |
2554 | ||
b0ab8123 | 2555 | static void |
971de7fb | 2556 | make_current (struct glyph_matrix *desired_matrix, struct glyph_matrix *current_matrix, int row) |
5f5c8ee5 GM |
2557 | { |
2558 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2559 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
59ea14cd | 2560 | bool mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2561 | |
2562 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2563 | between both rows, and does a structure assignment otherwise. */ | |
2564 | assign_row (current_row, desired_row); | |
2565 | ||
2566 | /* Enable current_row to mark it as valid. */ | |
96c06863 | 2567 | current_row->enabled_p = true; |
e876ff42 | 2568 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2569 | |
2570 | /* If we are called on frame matrices, perform analogous operations | |
2571 | for window matrices. */ | |
2572 | if (frame_matrix_frame) | |
e69b0960 | 2573 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); |
5f5c8ee5 GM |
2574 | } |
2575 | ||
2576 | ||
2577 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2578 | W's frame which has been made current (by swapping pointers between | |
2579 | current and desired matrix). Perform analogous operations in the | |
2580 | matrices of leaf windows in the window tree rooted at W. */ | |
2581 | ||
2582 | static void | |
971de7fb | 2583 | mirror_make_current (struct window *w, int frame_row) |
5f5c8ee5 GM |
2584 | { |
2585 | while (w) | |
2586 | { | |
e74aeda8 DA |
2587 | if (WINDOWP (w->contents)) |
2588 | mirror_make_current (XWINDOW (w->contents), frame_row); | |
5f5c8ee5 GM |
2589 | else |
2590 | { | |
2591 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2592 | here because the checks performed in debug mode there | |
2593 | will not allow the conversion. */ | |
2594 | int row = frame_row - w->desired_matrix->matrix_y; | |
2595 | ||
2596 | /* If FRAME_ROW is within W, assign the desired row to the | |
2597 | current row (exchanging glyph pointers). */ | |
2598 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
2599 | { | |
2600 | struct glyph_row *current_row | |
2601 | = MATRIX_ROW (w->current_matrix, row); | |
2602 | struct glyph_row *desired_row | |
2603 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
2604 | |
2605 | if (desired_row->enabled_p) | |
2606 | assign_row (current_row, desired_row); | |
2607 | else | |
2608 | swap_glyph_pointers (desired_row, current_row); | |
96c06863 | 2609 | current_row->enabled_p = true; |
d009ae66 EZ |
2610 | |
2611 | /* Set the Y coordinate of the mode/header line's row. | |
2612 | It is needed in draw_row_with_mouse_face to find the | |
2613 | screen coordinates. (Window-based redisplay sets | |
2614 | this in update_window, but no one seems to do that | |
2615 | for frame-based redisplay.) */ | |
2616 | if (current_row->mode_line_p) | |
2617 | current_row->y = row; | |
5f5c8ee5 GM |
2618 | } |
2619 | } | |
177c0ea7 | 2620 | |
d3d50620 | 2621 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2622 | } |
2623 | } | |
2624 | ||
2625 | ||
2626 | /* Perform row dance after scrolling. We are working on the range of | |
2627 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
2628 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
2629 | row I in the range 0 <= I < NLINES, the index of the original line | |
2630 | to move to I. This index is relative to the row range, i.e. 0 <= | |
2631 | index < NLINES. RETAINED_P is a vector containing zero for each | |
2632 | row 0 <= I < NLINES which is empty. | |
2633 | ||
2634 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 2635 | |
5f5c8ee5 | 2636 | void |
6f704c76 DN |
2637 | mirrored_line_dance (struct glyph_matrix *matrix, int unchanged_at_top, int nlines, |
2638 | int *copy_from, char *retained_p) | |
5f5c8ee5 GM |
2639 | { |
2640 | /* A copy of original rows. */ | |
2641 | struct glyph_row *old_rows; | |
2642 | ||
2643 | /* Rows to assign to. */ | |
2644 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 2645 | |
5f5c8ee5 GM |
2646 | int i; |
2647 | ||
2648 | /* Make a copy of the original rows. */ | |
38182d90 | 2649 | old_rows = alloca (nlines * sizeof *old_rows); |
72af86bd | 2650 | memcpy (old_rows, new_rows, nlines * sizeof *old_rows); |
5f5c8ee5 GM |
2651 | |
2652 | /* Assign new rows, maybe clear lines. */ | |
2653 | for (i = 0; i < nlines; ++i) | |
2654 | { | |
59ea14cd | 2655 | bool enabled_before_p = new_rows[i].enabled_p; |
5f5c8ee5 | 2656 | |
a54e2c05 DA |
2657 | eassert (i + unchanged_at_top < matrix->nrows); |
2658 | eassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
5f5c8ee5 GM |
2659 | new_rows[i] = old_rows[copy_from[i]]; |
2660 | new_rows[i].enabled_p = enabled_before_p; | |
2661 | ||
2662 | /* RETAINED_P is zero for empty lines. */ | |
2663 | if (!retained_p[copy_from[i]]) | |
96c06863 | 2664 | new_rows[i].enabled_p = false; |
5f5c8ee5 GM |
2665 | } |
2666 | ||
153a073c | 2667 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 | 2668 | if (frame_matrix_frame) |
e69b0960 | 2669 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), |
5f5c8ee5 GM |
2670 | unchanged_at_top, nlines, copy_from, retained_p); |
2671 | } | |
2672 | ||
2673 | ||
a13396c9 | 2674 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 2675 | the current frame matrix. */ |
a13396c9 GM |
2676 | |
2677 | static void | |
971de7fb | 2678 | sync_window_with_frame_matrix_rows (struct window *w) |
a13396c9 | 2679 | { |
d3d50620 | 2680 | struct frame *f = XFRAME (w->frame); |
a13396c9 | 2681 | struct glyph_row *window_row, *window_row_end, *frame_row; |
075c507b | 2682 | int left, right, x, width; |
a13396c9 | 2683 | |
e74aeda8 DA |
2684 | /* Preconditions: W must be a live window on a tty frame. */ |
2685 | eassert (BUFFERP (w->contents)); | |
a54e2c05 | 2686 | eassert (!FRAME_WINDOW_P (f)); |
a13396c9 | 2687 | |
d3d50620 DA |
2688 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
2689 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
2690 | x = w->current_matrix->matrix_x; |
2691 | width = w->current_matrix->matrix_w; | |
2692 | ||
a13396c9 GM |
2693 | window_row = w->current_matrix->rows; |
2694 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 2695 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 2696 | |
5cb88111 | 2697 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 2698 | { |
5cb88111 GM |
2699 | window_row->glyphs[LEFT_MARGIN_AREA] |
2700 | = frame_row->glyphs[0] + x; | |
2701 | window_row->glyphs[TEXT_AREA] | |
2702 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
2703 | window_row->glyphs[LAST_AREA] | |
2704 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
2705 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
2706 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
2707 | } |
2708 | } | |
2709 | ||
2710 | ||
2711 | /* Return the window in the window tree rooted in W containing frame | |
2712 | row ROW. Value is null if none is found. */ | |
2713 | ||
09ad5a91 | 2714 | static struct window * |
971de7fb | 2715 | frame_row_to_window (struct window *w, int row) |
a13396c9 GM |
2716 | { |
2717 | struct window *found = NULL; | |
177c0ea7 | 2718 | |
a13396c9 GM |
2719 | while (w && !found) |
2720 | { | |
e74aeda8 DA |
2721 | if (WINDOWP (w->contents)) |
2722 | found = frame_row_to_window (XWINDOW (w->contents), row); | |
7df02016 KS |
2723 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
2724 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 2725 | found = w; |
177c0ea7 | 2726 | |
d3d50620 | 2727 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
a13396c9 GM |
2728 | } |
2729 | ||
2730 | return found; | |
2731 | } | |
2732 | ||
2733 | ||
5f5c8ee5 GM |
2734 | /* Perform a line dance in the window tree rooted at W, after |
2735 | scrolling a frame matrix in mirrored_line_dance. | |
2736 | ||
2737 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
2738 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
2739 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
2740 | I < NLINES, the index of the original line to move to I. This | |
2741 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
2742 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
2743 | which is empty. */ | |
2744 | ||
2745 | static void | |
971de7fb | 2746 | mirror_line_dance (struct window *w, int unchanged_at_top, int nlines, int *copy_from, char *retained_p) |
5f5c8ee5 GM |
2747 | { |
2748 | while (w) | |
2749 | { | |
e74aeda8 DA |
2750 | if (WINDOWP (w->contents)) |
2751 | mirror_line_dance (XWINDOW (w->contents), unchanged_at_top, | |
5f5c8ee5 GM |
2752 | nlines, copy_from, retained_p); |
2753 | else | |
2754 | { | |
2755 | /* W is a leaf window, and we are working on its current | |
2756 | matrix m. */ | |
2757 | struct glyph_matrix *m = w->current_matrix; | |
59ea14cd PE |
2758 | int i; |
2759 | bool sync_p = 0; | |
5f5c8ee5 GM |
2760 | struct glyph_row *old_rows; |
2761 | ||
2762 | /* Make a copy of the original rows of matrix m. */ | |
38182d90 | 2763 | old_rows = alloca (m->nrows * sizeof *old_rows); |
72af86bd | 2764 | memcpy (old_rows, m->rows, m->nrows * sizeof *old_rows); |
5f5c8ee5 GM |
2765 | |
2766 | for (i = 0; i < nlines; ++i) | |
2767 | { | |
2768 | /* Frame relative line assigned to. */ | |
2769 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 2770 | |
5f5c8ee5 GM |
2771 | /* Frame relative line assigned. */ |
2772 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 2773 | |
5f5c8ee5 GM |
2774 | /* Window relative line assigned to. */ |
2775 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 2776 | |
5f5c8ee5 GM |
2777 | /* Window relative line assigned. */ |
2778 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 2779 | |
5f5c8ee5 | 2780 | /* Is assigned line inside window? */ |
59ea14cd | 2781 | bool from_inside_window_p |
5f5c8ee5 | 2782 | = window_from >= 0 && window_from < m->matrix_h; |
177c0ea7 | 2783 | |
a13396c9 | 2784 | /* Is assigned to line inside window? */ |
59ea14cd | 2785 | bool to_inside_window_p |
a13396c9 | 2786 | = window_to >= 0 && window_to < m->matrix_h; |
177c0ea7 | 2787 | |
a13396c9 | 2788 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 2789 | { |
5f5c8ee5 GM |
2790 | /* Do the assignment. The enabled_p flag is saved |
2791 | over the assignment because the old redisplay did | |
2792 | that. */ | |
59ea14cd | 2793 | bool enabled_before_p = m->rows[window_to].enabled_p; |
5f5c8ee5 GM |
2794 | m->rows[window_to] = old_rows[window_from]; |
2795 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 2796 | |
5f5c8ee5 GM |
2797 | /* If frame line is empty, window line is empty, too. */ |
2798 | if (!retained_p[copy_from[i]]) | |
96c06863 | 2799 | m->rows[window_to].enabled_p = false; |
5f5c8ee5 | 2800 | } |
a13396c9 GM |
2801 | else if (to_inside_window_p) |
2802 | { | |
2803 | /* A copy between windows. This is an infrequent | |
2804 | case not worth optimizing. */ | |
d3d50620 | 2805 | struct frame *f = XFRAME (w->frame); |
a13396c9 GM |
2806 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
2807 | struct window *w2; | |
2808 | struct glyph_matrix *m2; | |
2809 | int m2_from; | |
2810 | ||
fe8b8401 | 2811 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
2812 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
2813 | -nw', FROM_FRAME sometimes has no associated window. | |
2814 | This check avoids a segfault if W2 is null. */ | |
2815 | if (w2) | |
2816 | { | |
2817 | m2 = w2->current_matrix; | |
2818 | m2_from = frame_from - m2->matrix_y; | |
2819 | copy_row_except_pointers (m->rows + window_to, | |
2820 | m2->rows + m2_from); | |
2821 | ||
2822 | /* If frame line is empty, window line is empty, too. */ | |
2823 | if (!retained_p[copy_from[i]]) | |
96c06863 | 2824 | m->rows[window_to].enabled_p = false; |
6183d842 | 2825 | } |
a13396c9 GM |
2826 | sync_p = 1; |
2827 | } | |
2828 | else if (from_inside_window_p) | |
2829 | sync_p = 1; | |
5f5c8ee5 | 2830 | } |
a13396c9 GM |
2831 | |
2832 | /* If there was a copy between windows, make sure glyph | |
2833 | pointers are in sync with the frame matrix. */ | |
2834 | if (sync_p) | |
2835 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 2836 | |
5f5c8ee5 GM |
2837 | /* Check that no pointers are lost. */ |
2838 | CHECK_MATRIX (m); | |
2839 | } | |
2840 | ||
2841 | /* Next window on same level. */ | |
d3d50620 | 2842 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2843 | } |
2844 | } | |
2845 | ||
2846 | ||
e509cfa6 | 2847 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
2848 | |
2849 | /* Check that window and frame matrices agree about their | |
2850 | understanding where glyphs of the rows are to find. For each | |
2851 | window in the window tree rooted at W, check that rows in the | |
2852 | matrices of leaf window agree with their frame matrices about | |
2853 | glyph pointers. */ | |
2854 | ||
85fece3e | 2855 | static void |
59fc5cf9 | 2856 | check_window_matrix_pointers (struct window *w) |
5f5c8ee5 GM |
2857 | { |
2858 | while (w) | |
2859 | { | |
e74aeda8 DA |
2860 | if (WINDOWP (w->contents)) |
2861 | check_window_matrix_pointers (XWINDOW (w->contents)); | |
5f5c8ee5 | 2862 | else |
60a8948a | 2863 | { |
d3d50620 | 2864 | struct frame *f = XFRAME (w->frame); |
5f5c8ee5 GM |
2865 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); |
2866 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 2867 | } |
177c0ea7 | 2868 | |
d3d50620 | 2869 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2870 | } |
2871 | } | |
2872 | ||
2873 | ||
2874 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
2875 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
2876 | each row in WINDOW_MATRIX check that it's a slice of the | |
2877 | corresponding frame row. If it isn't, abort. */ | |
2878 | ||
2879 | static void | |
59fc5cf9 AS |
2880 | check_matrix_pointers (struct glyph_matrix *window_matrix, |
2881 | struct glyph_matrix *frame_matrix) | |
5f5c8ee5 GM |
2882 | { |
2883 | /* Row number in WINDOW_MATRIX. */ | |
2884 | int i = 0; | |
2885 | ||
2886 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
2887 | int j = window_matrix->matrix_y; | |
2888 | ||
177c0ea7 | 2889 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
2890 | slice of the row in the frame matrix. If it isn't we didn't |
2891 | mirror an operation on the frame matrix correctly. */ | |
2892 | while (i < window_matrix->nrows) | |
2893 | { | |
2894 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
2895 | frame_matrix->rows + j)) | |
1088b922 | 2896 | emacs_abort (); |
5f5c8ee5 GM |
2897 | ++i, ++j; |
2898 | } | |
2899 | } | |
2900 | ||
e509cfa6 | 2901 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
2902 | |
2903 | ||
2904 | \f | |
2905 | /********************************************************************** | |
2906 | VPOS and HPOS translations | |
2907 | **********************************************************************/ | |
2908 | ||
e509cfa6 | 2909 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
2910 | |
2911 | /* Translate vertical position VPOS which is relative to window W to a | |
2912 | vertical position relative to W's frame. */ | |
2913 | ||
2914 | static int | |
59fc5cf9 | 2915 | window_to_frame_vpos (struct window *w, int vpos) |
5f5c8ee5 | 2916 | { |
d3d50620 | 2917 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
a54e2c05 | 2918 | eassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); |
7df02016 | 2919 | vpos += WINDOW_TOP_EDGE_LINE (w); |
d3d50620 | 2920 | eassert (vpos >= 0 && vpos <= FRAME_LINES (XFRAME (w->frame))); |
5f5c8ee5 GM |
2921 | return vpos; |
2922 | } | |
2923 | ||
2924 | ||
2925 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 2926 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
2927 | |
2928 | static int | |
59fc5cf9 | 2929 | window_to_frame_hpos (struct window *w, int hpos) |
5f5c8ee5 | 2930 | { |
d3d50620 | 2931 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 2932 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
2933 | return hpos; |
2934 | } | |
177c0ea7 | 2935 | |
5f5c8ee5 GM |
2936 | #endif /* GLYPH_DEBUG */ |
2937 | ||
2938 | ||
2939 | \f | |
2940 | /********************************************************************** | |
2941 | Redrawing Frames | |
2942 | **********************************************************************/ | |
2943 | ||
2a14f83b | 2944 | /* Redraw frame F. */ |
5f5c8ee5 | 2945 | |
2a14f83b DA |
2946 | void |
2947 | redraw_frame (struct frame *f) | |
2948 | { | |
2949 | /* Error if F has no glyphs. */ | |
2950 | eassert (f->glyphs_initialized_p); | |
5f5c8ee5 | 2951 | update_begin (f); |
f2adda5e | 2952 | if (FRAME_MSDOS_P (f)) |
79d39b69 | 2953 | FRAME_TERMINAL (f)->set_terminal_modes_hook (FRAME_TERMINAL (f)); |
385ed61f | 2954 | clear_frame (f); |
5f5c8ee5 GM |
2955 | clear_current_matrices (f); |
2956 | update_end (f); | |
94ae2ad4 | 2957 | windows_or_buffers_changed = 13; |
5f5c8ee5 GM |
2958 | /* Mark all windows as inaccurate, so that every window will have |
2959 | its redisplay done. */ | |
2960 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
44ad1cf7 SM |
2961 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), true); |
2962 | f->garbaged = false; | |
5f5c8ee5 GM |
2963 | } |
2964 | ||
2a14f83b DA |
2965 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 0, 1, 0, |
2966 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. | |
2967 | If FRAME is omitted or nil, the selected frame is used. */) | |
2968 | (Lisp_Object frame) | |
5f5c8ee5 | 2969 | { |
2a14f83b DA |
2970 | redraw_frame (decode_live_frame (frame)); |
2971 | return Qnil; | |
5f5c8ee5 GM |
2972 | } |
2973 | ||
5f5c8ee5 | 2974 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", |
7ee72033 | 2975 | doc: /* Clear and redisplay all visible frames. */) |
5842a27b | 2976 | (void) |
5f5c8ee5 GM |
2977 | { |
2978 | Lisp_Object tail, frame; | |
2979 | ||
2980 | FOR_EACH_FRAME (tail, frame) | |
2981 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
2a14f83b | 2982 | redraw_frame (XFRAME (frame)); |
5f5c8ee5 GM |
2983 | |
2984 | return Qnil; | |
2985 | } | |
2986 | ||
2987 | ||
5f5c8ee5 | 2988 | \f |
5f5c8ee5 GM |
2989 | /*********************************************************************** |
2990 | Frame Update | |
2991 | ***********************************************************************/ | |
4588ec20 | 2992 | |
5f5c8ee5 | 2993 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 2994 | |
59ea14cd PE |
2995 | If FORCE_P, don't let redisplay be stopped by detecting pending input. |
2996 | If INHIBIT_HAIRY_ID_P, don't try scrolling. | |
177c0ea7 | 2997 | |
59ea14cd | 2998 | Value is true if redisplay was stopped due to pending input. */ |
4588ec20 | 2999 | |
59ea14cd PE |
3000 | bool |
3001 | update_frame (struct frame *f, bool force_p, bool inhibit_hairy_id_p) | |
5f5c8ee5 | 3002 | { |
59ea14cd PE |
3003 | /* True means display has been paused because of pending input. */ |
3004 | bool paused_p; | |
e69b0960 | 3005 | struct window *root_window = XWINDOW (f->root_window); |
5f5c8ee5 | 3006 | |
a2130dbb KS |
3007 | if (redisplay_dont_pause) |
3008 | force_p = 1; | |
6fd326b7 | 3009 | else if (!force_p && detect_input_pending_ignore_squeezables ()) |
d012c62b | 3010 | { |
6fd326b7 DA |
3011 | paused_p = 1; |
3012 | goto do_pause; | |
d012c62b | 3013 | } |
d012c62b | 3014 | |
5f5c8ee5 | 3015 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3016 | { |
5f5c8ee5 GM |
3017 | /* We are working on window matrix basis. All windows whose |
3018 | flag must_be_updated_p is set have to be updated. */ | |
3019 | ||
3020 | /* Record that we are not working on frame matrices. */ | |
3021 | set_frame_matrix_frame (NULL); | |
3022 | ||
3023 | /* Update all windows in the window tree of F, maybe stopping | |
3024 | when pending input is detected. */ | |
3025 | update_begin (f); | |
3026 | ||
5a49b79c | 3027 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
3028 | /* Update the menu bar on X frames that don't have toolkit |
3029 | support. */ | |
e69b0960 DA |
3030 | if (WINDOWP (f->menu_bar_window)) |
3031 | update_window (XWINDOW (f->menu_bar_window), 1); | |
5a49b79c | 3032 | #endif |
5f5c8ee5 | 3033 | |
742516e0 | 3034 | #if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS) |
5f5c8ee5 | 3035 | /* Update the tool-bar window, if present. */ |
e69b0960 | 3036 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3037 | { |
e69b0960 | 3038 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3039 | |
3040 | /* Update tool-bar window. */ | |
3041 | if (w->must_be_updated_p) | |
4588ec20 | 3042 | { |
153a073c PJ |
3043 | Lisp_Object tem; |
3044 | ||
5f5c8ee5 | 3045 | update_window (w, 1); |
44ad1cf7 | 3046 | w->must_be_updated_p = false; |
5f5c8ee5 GM |
3047 | |
3048 | /* Swap tool-bar strings. We swap because we want to | |
3049 | reuse strings. */ | |
e69b0960 | 3050 | tem = f->current_tool_bar_string; |
f00af5b1 PE |
3051 | fset_current_tool_bar_string (f, f->desired_tool_bar_string); |
3052 | fset_desired_tool_bar_string (f, tem); | |
4588ec20 JB |
3053 | } |
3054 | } | |
742516e0 | 3055 | #endif |
5f5c8ee5 GM |
3056 | |
3057 | /* Update windows. */ | |
3058 | paused_p = update_window_tree (root_window, force_p); | |
3059 | update_end (f); | |
4588ec20 | 3060 | } |
5f5c8ee5 GM |
3061 | else |
3062 | { | |
3063 | /* We are working on frame matrix basis. Set the frame on whose | |
3064 | frame matrix we operate. */ | |
3065 | set_frame_matrix_frame (f); | |
3066 | ||
868dd24b | 3067 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3068 | build_frame_matrix (f); |
177c0ea7 | 3069 | |
868dd24b GM |
3070 | /* Update the display */ |
3071 | update_begin (f); | |
5f5c8ee5 | 3072 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3073 | update_end (f); |
3074 | ||
7d2f1216 | 3075 | if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f)) |
3224dac1 | 3076 | { |
0b0d3e0b KL |
3077 | if (FRAME_TTY (f)->termscript) |
3078 | fflush (FRAME_TTY (f)->termscript); | |
7d2f1216 EZ |
3079 | if (FRAME_TERMCAP_P (f)) |
3080 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3081 | } |
868dd24b | 3082 | |
5f5c8ee5 | 3083 | /* Check window matrices for lost pointers. */ |
e509cfa6 | 3084 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
3085 | check_window_matrix_pointers (root_window); |
3086 | add_frame_display_history (f, paused_p); | |
3087 | #endif | |
5f5c8ee5 GM |
3088 | } |
3089 | ||
993d4ab6 | 3090 | do_pause: |
5f5c8ee5 | 3091 | /* Reset flags indicating that a window should be updated. */ |
44ad1cf7 | 3092 | set_window_update_flags (root_window, false); |
177c0ea7 | 3093 | |
868dd24b | 3094 | display_completed = !paused_p; |
5f5c8ee5 | 3095 | return paused_p; |
4588ec20 | 3096 | } |
5f5c8ee5 | 3097 | |
b5e9cbb6 EZ |
3098 | /* Update a TTY frame F that has a menu dropped down over some of its |
3099 | glyphs. This is like the second part of update_frame, but it | |
3100 | doesn't call build_frame_matrix, because we already have the | |
3101 | desired matrix prepared, and don't want it to be overwritten by the | |
3102 | text of the normal display. */ | |
3103 | void | |
3104 | update_frame_with_menu (struct frame *f) | |
3105 | { | |
3106 | struct window *root_window = XWINDOW (f->root_window); | |
e7873136 | 3107 | bool paused_p; |
b5e9cbb6 | 3108 | |
e7873136 | 3109 | eassert (FRAME_TERMCAP_P (f)); |
b5e9cbb6 EZ |
3110 | |
3111 | /* We are working on frame matrix basis. Set the frame on whose | |
3112 | frame matrix we operate. */ | |
3113 | set_frame_matrix_frame (f); | |
3114 | ||
44ad1cf7 | 3115 | /* Update the display. */ |
b5e9cbb6 | 3116 | update_begin (f); |
141f1ff7 EZ |
3117 | /* Force update_frame_1 not to stop due to pending input, and not |
3118 | try scrolling. */ | |
b5e9cbb6 EZ |
3119 | paused_p = update_frame_1 (f, 1, 1); |
3120 | update_end (f); | |
3121 | ||
3122 | if (FRAME_TTY (f)->termscript) | |
3123 | fflush (FRAME_TTY (f)->termscript); | |
3124 | fflush (FRAME_TTY (f)->output); | |
3125 | /* Check window matrices for lost pointers. */ | |
3126 | #if GLYPH_DEBUG | |
ffc3882f EZ |
3127 | #if 0 |
3128 | /* We cannot possibly survive the matrix pointers check, since | |
3129 | we have overwritten parts of the frame glyph matrix without | |
3130 | making any updates to the window matrices. */ | |
b5e9cbb6 | 3131 | check_window_matrix_pointers (root_window); |
ffc3882f | 3132 | #endif |
b5e9cbb6 | 3133 | add_frame_display_history (f, paused_p); |
3b158d11 PE |
3134 | #else |
3135 | IF_LINT ((void) paused_p); | |
b5e9cbb6 EZ |
3136 | #endif |
3137 | ||
3138 | /* Reset flags indicating that a window should be updated. */ | |
44ad1cf7 | 3139 | set_window_update_flags (root_window, false); |
b5e9cbb6 | 3140 | } |
5f5c8ee5 | 3141 | |
4588ec20 | 3142 | \f |
5f5c8ee5 GM |
3143 | /************************************************************************ |
3144 | Window-based updates | |
3145 | ************************************************************************/ | |
3146 | ||
59ea14cd PE |
3147 | /* Perform updates in window tree rooted at W. |
3148 | If FORCE_P, don't stop updating if input is pending. */ | |
5f5c8ee5 | 3149 | |
59ea14cd PE |
3150 | static bool |
3151 | update_window_tree (struct window *w, bool force_p) | |
5f5c8ee5 | 3152 | { |
59ea14cd | 3153 | bool paused_p = 0; |
177c0ea7 | 3154 | |
5f5c8ee5 GM |
3155 | while (w && !paused_p) |
3156 | { | |
e74aeda8 DA |
3157 | if (WINDOWP (w->contents)) |
3158 | paused_p |= update_window_tree (XWINDOW (w->contents), force_p); | |
5f5c8ee5 GM |
3159 | else if (w->must_be_updated_p) |
3160 | paused_p |= update_window (w, force_p); | |
3161 | ||
d3d50620 | 3162 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
3163 | } |
3164 | ||
3165 | return paused_p; | |
3166 | } | |
3167 | ||
3168 | ||
59ea14cd PE |
3169 | /* Update window W if its flag must_be_updated_p is set. |
3170 | If FORCE_P, don't stop updating if input is pending. */ | |
5f5c8ee5 GM |
3171 | |
3172 | void | |
59ea14cd | 3173 | update_single_window (struct window *w, bool force_p) |
5f5c8ee5 GM |
3174 | { |
3175 | if (w->must_be_updated_p) | |
3176 | { | |
3177 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
3178 | ||
3179 | /* Record that this is not a frame-based redisplay. */ | |
3180 | set_frame_matrix_frame (NULL); | |
3181 | ||
a2130dbb KS |
3182 | if (redisplay_dont_pause) |
3183 | force_p = 1; | |
d012c62b | 3184 | |
5f5c8ee5 GM |
3185 | /* Update W. */ |
3186 | update_begin (f); | |
3187 | update_window (w, force_p); | |
3188 | update_end (f); | |
4588ec20 | 3189 | |
5f5c8ee5 | 3190 | /* Reset flag in W. */ |
44ad1cf7 | 3191 | w->must_be_updated_p = false; |
5f5c8ee5 GM |
3192 | } |
3193 | } | |
4588ec20 | 3194 | |
93e023fc | 3195 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 3196 | |
408f5064 GM |
3197 | /* Redraw lines from the current matrix of window W that are |
3198 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
3199 | ||
3200 | static void | |
971de7fb | 3201 | redraw_overlapped_rows (struct window *w, int yb) |
408f5064 | 3202 | { |
d8ee7803 | 3203 | int i; |
fa971ac3 | 3204 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3fc809e2 | 3205 | |
408f5064 GM |
3206 | /* If rows overlapping others have been changed, the rows being |
3207 | overlapped have to be redrawn. This won't draw lines that have | |
3208 | already been drawn in update_window_line because overlapped_p in | |
3209 | desired rows is 0, so after row assignment overlapped_p in | |
3210 | current rows is 0. */ | |
3211 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
3212 | { | |
e876ff42 | 3213 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
3214 | |
3215 | if (!row->enabled_p) | |
3216 | break; | |
3217 | else if (row->mode_line_p) | |
3218 | continue; | |
177c0ea7 | 3219 | |
408f5064 GM |
3220 | if (row->overlapped_p) |
3221 | { | |
3222 | enum glyph_row_area area; | |
177c0ea7 | 3223 | |
408f5064 GM |
3224 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
3225 | { | |
f60e429a DA |
3226 | output_cursor_to (w, i, 0, row->y, |
3227 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 3228 | if (row->used[area]) |
7f780da6 DA |
3229 | FRAME_RIF (f)->write_glyphs (w, row, row->glyphs[area], |
3230 | area, row->used[area]); | |
3231 | FRAME_RIF (f)->clear_end_of_line (w, row, area, -1); | |
408f5064 | 3232 | } |
177c0ea7 | 3233 | |
408f5064 GM |
3234 | row->overlapped_p = 0; |
3235 | } | |
3236 | ||
e876ff42 | 3237 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
3238 | break; |
3239 | } | |
3240 | } | |
3241 | ||
3242 | ||
3243 | /* Redraw lines from the current matrix of window W that overlap | |
3244 | others. YB is bottom-most y-position in W. */ | |
3245 | ||
3246 | static void | |
971de7fb | 3247 | redraw_overlapping_rows (struct window *w, int yb) |
408f5064 GM |
3248 | { |
3249 | int i, bottom_y; | |
3250 | struct glyph_row *row; | |
fa971ac3 | 3251 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
3fc809e2 | 3252 | |
408f5064 GM |
3253 | for (i = 0; i < w->current_matrix->nrows; ++i) |
3254 | { | |
3255 | row = w->current_matrix->rows + i; | |
3256 | ||
3257 | if (!row->enabled_p) | |
3258 | break; | |
3259 | else if (row->mode_line_p) | |
3260 | continue; | |
177c0ea7 | 3261 | |
408f5064 GM |
3262 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
3263 | ||
b4b2c2ca | 3264 | if (row->overlapping_p) |
408f5064 | 3265 | { |
41124e06 YM |
3266 | int overlaps = 0; |
3267 | ||
b4b2c2ca | 3268 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) && i > 0 |
41124e06 YM |
3269 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) |
3270 | overlaps |= OVERLAPS_PRED; | |
b4b2c2ca | 3271 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) && bottom_y < yb |
41124e06 YM |
3272 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) |
3273 | overlaps |= OVERLAPS_SUCC; | |
3274 | ||
3275 | if (overlaps) | |
3276 | { | |
3277 | if (row->used[LEFT_MARGIN_AREA]) | |
3278 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
3279 | ||
3280 | if (row->used[TEXT_AREA]) | |
3281 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
3282 | ||
3283 | if (row->used[RIGHT_MARGIN_AREA]) | |
3284 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
3285 | ||
c5e87d10 | 3286 | /* Record in neighbor rows that ROW overwrites part of |
41124e06 YM |
3287 | their display. */ |
3288 | if (overlaps & OVERLAPS_PRED) | |
3289 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
3290 | if (overlaps & OVERLAPS_SUCC) | |
3291 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
3292 | } | |
408f5064 GM |
3293 | } |
3294 | ||
3295 | if (bottom_y >= yb) | |
3296 | break; | |
3297 | } | |
3298 | } | |
3299 | ||
93e023fc KS |
3300 | #endif /* HAVE_WINDOW_SYSTEM */ |
3301 | ||
408f5064 | 3302 | |
09ad5a91 | 3303 | #if defined GLYPH_DEBUG && 0 |
93962bfa GM |
3304 | |
3305 | /* Check that no row in the current matrix of window W is enabled | |
3306 | which is below what's displayed in the window. */ | |
3307 | ||
09ad5a91 | 3308 | static void |
971de7fb | 3309 | check_current_matrix_flags (struct window *w) |
93962bfa | 3310 | { |
59ea14cd | 3311 | bool last_seen_p = 0; |
93962bfa GM |
3312 | int i, yb = window_text_bottom_y (w); |
3313 | ||
3314 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
3315 | { | |
3316 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
3317 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3318 | last_seen_p = 1; | |
3319 | else if (last_seen_p && row->enabled_p) | |
1088b922 | 3320 | emacs_abort (); |
93962bfa GM |
3321 | } |
3322 | } | |
3323 | ||
3324 | #endif /* GLYPH_DEBUG */ | |
3325 | ||
3326 | ||
59ea14cd PE |
3327 | /* Update display of window W. |
3328 | If FORCE_P, don't stop updating when input is pending. */ | |
5f5c8ee5 | 3329 | |
59ea14cd PE |
3330 | static bool |
3331 | update_window (struct window *w, bool force_p) | |
4588ec20 | 3332 | { |
5f5c8ee5 | 3333 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
59ea14cd | 3334 | bool paused_p; |
5f5c8ee5 | 3335 | int preempt_count = baud_rate / 2400 + 1; |
597cfb3f | 3336 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
e509cfa6 | 3337 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 3338 | /* Check that W's frame doesn't have glyph matrices. */ |
a54e2c05 | 3339 | eassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 3340 | #endif |
5f5c8ee5 GM |
3341 | |
3342 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb | 3343 | if (!force_p) |
a2d5fca0 | 3344 | detect_input_pending_ignore_squeezables (); |
4588ec20 | 3345 | |
5f5c8ee5 GM |
3346 | /* If forced to complete the update, or if no input is pending, do |
3347 | the update. */ | |
8fd9a666 | 3348 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 3349 | { |
5f5c8ee5 GM |
3350 | struct glyph_row *row, *end; |
3351 | struct glyph_row *mode_line_row; | |
56974e03 | 3352 | struct glyph_row *header_line_row; |
59ea14cd PE |
3353 | int yb; |
3354 | bool changed_p = 0, mouse_face_overwritten_p = 0; | |
0bc32927 | 3355 | int n_updated = 0; |
5f5c8ee5 GM |
3356 | |
3357 | rif->update_window_begin_hook (w); | |
3358 | yb = window_text_bottom_y (w); | |
138c0ae8 EZ |
3359 | row = MATRIX_ROW (desired_matrix, 0); |
3360 | end = MATRIX_MODE_LINE_ROW (desired_matrix); | |
177c0ea7 | 3361 | |
394305db EZ |
3362 | /* Take note of the header line, if there is one. We will |
3363 | update it below, after updating all of the window's lines. */ | |
5f5c8ee5 | 3364 | if (row->mode_line_p) |
56974e03 GM |
3365 | { |
3366 | header_line_row = row; | |
3367 | ++row; | |
3368 | } | |
3369 | else | |
3370 | header_line_row = NULL; | |
5f5c8ee5 GM |
3371 | |
3372 | /* Update the mode line, if necessary. */ | |
3373 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
3374 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
3375 | { | |
3376 | mode_line_row->y = yb; | |
3377 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
3378 | desired_matrix), |
3379 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3380 | } |
3381 | ||
3382 | /* Find first enabled row. Optimizations in redisplay_internal | |
3383 | may lead to an update with only one row enabled. There may | |
3384 | be also completely empty matrices. */ | |
3385 | while (row < end && !row->enabled_p) | |
3386 | ++row; | |
177c0ea7 | 3387 | |
bfdcafe1 | 3388 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 3389 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
3390 | { |
3391 | int rc = scrolling_window (w, header_line_row != NULL); | |
3392 | if (rc < 0) | |
3393 | { | |
3394 | /* All rows were found to be equal. */ | |
3395 | paused_p = 0; | |
3396 | goto set_cursor; | |
3397 | } | |
3398 | else if (rc > 0) | |
6b61353c KH |
3399 | { |
3400 | /* We've scrolled the display. */ | |
3401 | force_p = 1; | |
3402 | changed_p = 1; | |
3403 | } | |
5f5c8ee5 GM |
3404 | } |
3405 | ||
3406 | /* Update the rest of the lines. */ | |
0bc32927 | 3407 | for (; row < end && (force_p || !input_pending); ++row) |
394305db EZ |
3408 | /* scrolling_window resets the enabled_p flag of the rows it |
3409 | reuses from current_matrix. */ | |
b7412313 | 3410 | if (row->enabled_p) |
5f5c8ee5 GM |
3411 | { |
3412 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
3413 | int i; | |
177c0ea7 | 3414 | |
153a073c | 3415 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
3416 | detect_input_pending. If it's done too often, |
3417 | scrolling large windows with repeated scroll-up | |
3418 | commands will too quickly pause redisplay. */ | |
e87b8809 | 3419 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 3420 | detect_input_pending_ignore_squeezables (); |
e876ff42 GM |
3421 | changed_p |= update_window_line (w, vpos, |
3422 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3423 | |
3424 | /* Mark all rows below the last visible one in the current | |
3425 | matrix as invalid. This is necessary because of | |
3426 | variable line heights. Consider the case of three | |
3427 | successive redisplays, where the first displays 5 | |
3428 | lines, the second 3 lines, and the third 5 lines again. | |
3429 | If the second redisplay wouldn't mark rows in the | |
3430 | current matrix invalid, the third redisplay might be | |
3431 | tempted to optimize redisplay based on lines displayed | |
3432 | in the first redisplay. */ | |
3433 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3434 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
96c06863 | 3435 | SET_MATRIX_ROW_ENABLED_P (w->current_matrix, i, false); |
5f5c8ee5 GM |
3436 | } |
3437 | ||
3438 | /* Was display preempted? */ | |
3439 | paused_p = row < end; | |
177c0ea7 | 3440 | |
56974e03 | 3441 | set_cursor: |
177c0ea7 | 3442 | |
6b61353c KH |
3443 | /* Update the header line after scrolling because a new header |
3444 | line would otherwise overwrite lines at the top of the window | |
3445 | that can be scrolled. */ | |
3446 | if (header_line_row && header_line_row->enabled_p) | |
3447 | { | |
3448 | header_line_row->y = 0; | |
3449 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
6b61353c KH |
3450 | } |
3451 | ||
153a073c | 3452 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
3453 | if (!paused_p && !w->pseudo_window_p) |
3454 | { | |
93e023fc | 3455 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
3456 | if (changed_p && rif->fix_overlapping_area) |
3457 | { | |
3458 | redraw_overlapped_rows (w, yb); | |
3459 | redraw_overlapping_rows (w, yb); | |
3460 | } | |
93e023fc | 3461 | #endif |
177c0ea7 | 3462 | |
5f5c8ee5 GM |
3463 | /* Make cursor visible at cursor position of W. */ |
3464 | set_window_cursor_after_update (w); | |
3465 | ||
e876ff42 GM |
3466 | #if 0 /* Check that current matrix invariants are satisfied. This is |
3467 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
3468 | IF_DEBUG (check_matrix_invariants (w)); |
3469 | #endif | |
4588ec20 | 3470 | } |
5f5c8ee5 | 3471 | |
e509cfa6 | 3472 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
3473 | /* Remember the redisplay method used to display the matrix. */ |
3474 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
3475 | #endif | |
408f5064 | 3476 | |
6b61353c KH |
3477 | #ifdef HAVE_WINDOW_SYSTEM |
3478 | update_window_fringes (w, 0); | |
3479 | #endif | |
3480 | ||
56974e03 GM |
3481 | /* End the update of window W. Don't set the cursor if we |
3482 | paused updating the display because in this case, | |
3483 | set_window_cursor_after_update hasn't been called, and | |
f60e429a | 3484 | W->output_cursor doesn't contain the cursor location. */ |
56974e03 | 3485 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); |
4588ec20 | 3486 | } |
5f5c8ee5 GM |
3487 | else |
3488 | paused_p = 1; | |
3489 | ||
e509cfa6 | 3490 | #ifdef GLYPH_DEBUG |
0cffd9d8 | 3491 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
3492 | add_window_display_history (w, w->current_matrix->method, paused_p); |
3493 | #endif | |
177c0ea7 | 3494 | |
5f5c8ee5 | 3495 | clear_glyph_matrix (desired_matrix); |
408f5064 | 3496 | |
5f5c8ee5 | 3497 | return paused_p; |
4588ec20 JB |
3498 | } |
3499 | ||
b64b3980 | 3500 | |
5f5c8ee5 GM |
3501 | /* Update the display of area AREA in window W, row number VPOS. |
3502 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
3503 | ||
3504 | static void | |
7f780da6 DA |
3505 | update_marginal_area (struct window *w, struct glyph_row *updated_row, |
3506 | enum glyph_row_area area, int vpos) | |
b64b3980 | 3507 | { |
5f5c8ee5 | 3508 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 3509 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 | 3510 | |
5f5c8ee5 GM |
3511 | /* Set cursor to start of glyphs, write them, and clear to the end |
3512 | of the area. I don't think that something more sophisticated is | |
3513 | necessary here, since marginal areas will not be the default. */ | |
f60e429a | 3514 | output_cursor_to (w, vpos, 0, desired_row->y, 0); |
5f5c8ee5 | 3515 | if (desired_row->used[area]) |
7f780da6 DA |
3516 | rif->write_glyphs (w, updated_row, desired_row->glyphs[area], |
3517 | area, desired_row->used[area]); | |
3518 | rif->clear_end_of_line (w, updated_row, area, -1); | |
b64b3980 | 3519 | } |
23b0200c | 3520 | |
352f1545 | 3521 | |
408f5064 | 3522 | /* Update the display of the text area of row VPOS in window W. |
59ea14cd | 3523 | Value is true if display has changed. */ |
5f5c8ee5 | 3524 | |
59ea14cd | 3525 | static bool |
7f780da6 | 3526 | update_text_area (struct window *w, struct glyph_row *updated_row, int vpos) |
23b0200c | 3527 | { |
5f5c8ee5 GM |
3528 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
3529 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3530 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
59ea14cd | 3531 | bool changed_p = 0; |
5f5c8ee5 | 3532 | |
5f5c8ee5 GM |
3533 | /* If rows are at different X or Y, or rows have different height, |
3534 | or the current row is marked invalid, write the entire line. */ | |
3535 | if (!current_row->enabled_p | |
3536 | || desired_row->y != current_row->y | |
3537 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
3538 | || desired_row->phys_ascent != current_row->phys_ascent |
3539 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 3540 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 3541 | || current_row->overlapped_p |
fee8b690 CY |
3542 | /* This next line is necessary for correctly redrawing |
3543 | mouse-face areas after scrolling and other operations. | |
3544 | However, it causes excessive flickering when mouse is moved | |
3545 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
3546 | line doesn't seem to hurt anything. -- cyd. |
3547 | But it is still needed for the header line. -- kfs. */ | |
3548 | || (current_row->mouse_face_p | |
3549 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
3550 | || current_row->x != desired_row->x) |
3551 | { | |
f60e429a | 3552 | output_cursor_to (w, vpos, 0, desired_row->y, desired_row->x); |
177c0ea7 | 3553 | |
5f5c8ee5 | 3554 | if (desired_row->used[TEXT_AREA]) |
7f780da6 DA |
3555 | rif->write_glyphs (w, updated_row, desired_row->glyphs[TEXT_AREA], |
3556 | TEXT_AREA, desired_row->used[TEXT_AREA]); | |
177c0ea7 | 3557 | |
5f5c8ee5 | 3558 | /* Clear to end of window. */ |
7f780da6 | 3559 | rif->clear_end_of_line (w, updated_row, TEXT_AREA, -1); |
408f5064 | 3560 | changed_p = 1; |
60f2f3f1 GM |
3561 | |
3562 | /* This erases the cursor. We do this here because | |
3563 | notice_overwritten_cursor cannot easily check this, which | |
3564 | might indicate that the whole functionality of | |
3565 | notice_overwritten_cursor would better be implemented here. | |
3566 | On the other hand, we need notice_overwritten_cursor as long | |
3567 | as mouse highlighting is done asynchronously outside of | |
3568 | redisplay. */ | |
3569 | if (vpos == w->phys_cursor.vpos) | |
3570 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
3571 | } |
3572 | else | |
3573 | { | |
3574 | int stop, i, x; | |
3575 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
3576 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
59ea14cd | 3577 | bool overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 3578 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
59ea14cd | 3579 | bool abort_skipping = 0; |
5f5c8ee5 | 3580 | |
78897758 YM |
3581 | /* If the desired row extends its face to the text area end, and |
3582 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
3583 | make sure we write at least one glyph, so that the face |
3584 | extension actually takes place. */ | |
78897758 YM |
3585 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
3586 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
3587 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
3588 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 3589 | --desired_stop_pos; |
177c0ea7 | 3590 | |
5f5c8ee5 GM |
3591 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
3592 | i = 0; | |
3593 | x = desired_row->x; | |
8399f8a0 GM |
3594 | |
3595 | /* Loop over glyphs that current and desired row may have | |
3596 | in common. */ | |
5f5c8ee5 | 3597 | while (i < stop) |
352f1545 | 3598 | { |
59ea14cd | 3599 | bool can_skip_p = !abort_skipping; |
177c0ea7 | 3600 | |
5f5c8ee5 | 3601 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
3602 | don't have to be written. We can't skip if the last |
3603 | current glyph overlaps the glyph to its right. For | |
3604 | example, consider a current row of `if ' with the `f' in | |
3605 | Courier bold so that it overlaps the ` ' to its right. | |
3606 | If the desired row is ` ', we would skip over the space | |
3607 | after the `if' and there would remain a pixel from the | |
3608 | `f' on the screen. */ | |
3609 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 3610 | { |
e47306e6 GM |
3611 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
3612 | int left, right; | |
177c0ea7 | 3613 | |
d3d50620 | 3614 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
e47306e6 | 3615 | &left, &right); |
91d227d9 | 3616 | can_skip_p = (right == 0 && !abort_skipping); |
352f1545 | 3617 | } |
177c0ea7 | 3618 | |
6d950f4c | 3619 | if (can_skip_p) |
352f1545 | 3620 | { |
91d227d9 CY |
3621 | int start_hpos = i; |
3622 | ||
6d950f4c GM |
3623 | while (i < stop |
3624 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
3625 | { | |
3626 | x += desired_glyph->pixel_width; | |
3627 | ++desired_glyph, ++current_glyph, ++i; | |
3628 | } | |
3629 | ||
3630 | /* Consider the case that the current row contains "xxx | |
3631 | ppp ggg" in italic Courier font, and the desired row | |
3632 | is "xxx ggg". The character `p' has lbearing, `g' | |
3633 | has not. The loop above will stop in front of the | |
3634 | first `p' in the current row. If we would start | |
3635 | writing glyphs there, we wouldn't erase the lbearing | |
3636 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 3637 | taken care of by draw_glyphs. */ |
6d950f4c GM |
3638 | if (overlapping_glyphs_p |
3639 | && i > 0 | |
3640 | && i < current_row->used[TEXT_AREA] | |
3641 | && (current_row->used[TEXT_AREA] | |
3642 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 3643 | { |
6d950f4c | 3644 | int left, right; |
177c0ea7 | 3645 | |
3a45383a | 3646 | rif->get_glyph_overhangs (current_glyph, |
d3d50620 | 3647 | XFRAME (w->frame), |
6d950f4c GM |
3648 | &left, &right); |
3649 | while (left > 0 && i > 0) | |
3650 | { | |
3651 | --i, --desired_glyph, --current_glyph; | |
3652 | x -= desired_glyph->pixel_width; | |
3653 | left -= desired_glyph->pixel_width; | |
3654 | } | |
91d227d9 CY |
3655 | |
3656 | /* Abort the skipping algorithm if we end up before | |
3657 | our starting point, to avoid looping (bug#1070). | |
3658 | This can happen when the lbearing is larger than | |
3659 | the pixel width. */ | |
3660 | abort_skipping = (i < start_hpos); | |
5f5c8ee5 | 3661 | } |
352f1545 | 3662 | } |
177c0ea7 | 3663 | |
5f5c8ee5 GM |
3664 | /* Try to avoid writing the entire rest of the desired row |
3665 | by looking for a resync point. This mainly prevents | |
3666 | mode line flickering in the case the mode line is in | |
3667 | fixed-pitch font, which it usually will be. */ | |
3668 | if (i < desired_row->used[TEXT_AREA]) | |
3669 | { | |
3670 | int start_x = x, start_hpos = i; | |
3671 | struct glyph *start = desired_glyph; | |
3672 | int current_x = x; | |
59ea14cd | 3673 | bool skip_first_p = !can_skip_p; |
6d950f4c | 3674 | |
5f5c8ee5 GM |
3675 | /* Find the next glyph that's equal again. */ |
3676 | while (i < stop | |
6d950f4c GM |
3677 | && (skip_first_p |
3678 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
3679 | && x == current_x) |
3680 | { | |
3681 | x += desired_glyph->pixel_width; | |
3682 | current_x += current_glyph->pixel_width; | |
3683 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 3684 | skip_first_p = 0; |
5f5c8ee5 | 3685 | } |
23b0200c | 3686 | |
5f5c8ee5 GM |
3687 | if (i == start_hpos || x != current_x) |
3688 | { | |
3689 | i = start_hpos; | |
3690 | x = start_x; | |
3691 | desired_glyph = start; | |
3692 | break; | |
3693 | } | |
e47306e6 | 3694 | |
f60e429a | 3695 | output_cursor_to (w, vpos, start_hpos, desired_row->y, start_x); |
7f780da6 DA |
3696 | rif->write_glyphs (w, updated_row, start, |
3697 | TEXT_AREA, i - start_hpos); | |
408f5064 | 3698 | changed_p = 1; |
5f5c8ee5 GM |
3699 | } |
3700 | } | |
177c0ea7 | 3701 | |
5f5c8ee5 GM |
3702 | /* Write the rest. */ |
3703 | if (i < desired_row->used[TEXT_AREA]) | |
3704 | { | |
f60e429a | 3705 | output_cursor_to (w, vpos, i, desired_row->y, x); |
7f780da6 DA |
3706 | rif->write_glyphs (w, updated_row, desired_glyph, |
3707 | TEXT_AREA, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 3708 | changed_p = 1; |
5f5c8ee5 | 3709 | } |
177c0ea7 | 3710 | |
5f5c8ee5 GM |
3711 | /* Maybe clear to end of line. */ |
3712 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
3713 | { | |
3714 | /* If new row extends to the end of the text area, nothing | |
3715 | has to be cleared, if and only if we did a write_glyphs | |
3716 | above. This is made sure by setting desired_stop_pos | |
3717 | appropriately above. */ | |
a54e2c05 | 3718 | eassert (i < desired_row->used[TEXT_AREA] |
78897758 YM |
3719 | || ((desired_row->used[TEXT_AREA] |
3720 | == current_row->used[TEXT_AREA]) | |
3721 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
3722 | } |
3723 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
3724 | { | |
3725 | /* If old row extends to the end of the text area, clear. */ | |
3726 | if (i >= desired_row->used[TEXT_AREA]) | |
f60e429a DA |
3727 | output_cursor_to (w, vpos, i, desired_row->y, |
3728 | desired_row->pixel_width); | |
7f780da6 | 3729 | rif->clear_end_of_line (w, updated_row, TEXT_AREA, -1); |
408f5064 | 3730 | changed_p = 1; |
5f5c8ee5 GM |
3731 | } |
3732 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 3733 | { |
5f5c8ee5 GM |
3734 | /* Otherwise clear to the end of the old row. Everything |
3735 | after that position should be clear already. */ | |
27786b2f | 3736 | int xlim; |
177c0ea7 | 3737 | |
5f5c8ee5 | 3738 | if (i >= desired_row->used[TEXT_AREA]) |
f60e429a DA |
3739 | output_cursor_to (w, vpos, i, desired_row->y, |
3740 | desired_row->pixel_width); | |
5f5c8ee5 GM |
3741 | |
3742 | /* If cursor is displayed at the end of the line, make sure | |
3743 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
3744 | with which to erase the cursor (because this method | |
3745 | doesn't work with lbearing/rbearing), so we must do it | |
3746 | this way. */ | |
3747 | if (vpos == w->phys_cursor.vpos | |
f951a506 EZ |
3748 | && (desired_row->reversed_p |
3749 | ? (w->phys_cursor.hpos < 0) | |
3750 | : (w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]))) | |
5f5c8ee5 GM |
3751 | { |
3752 | w->phys_cursor_on_p = 0; | |
27786b2f | 3753 | xlim = -1; |
5f5c8ee5 GM |
3754 | } |
3755 | else | |
27786b2f | 3756 | xlim = current_row->pixel_width; |
7f780da6 | 3757 | rif->clear_end_of_line (w, updated_row, TEXT_AREA, xlim); |
408f5064 | 3758 | changed_p = 1; |
2e8907d3 | 3759 | } |
23b0200c | 3760 | } |
408f5064 GM |
3761 | |
3762 | return changed_p; | |
23b0200c | 3763 | } |
4588ec20 | 3764 | |
5f5c8ee5 | 3765 | |
59ea14cd | 3766 | /* Update row VPOS in window W. Value is true if display has been changed. */ |
5f5c8ee5 | 3767 | |
59ea14cd PE |
3768 | static bool |
3769 | update_window_line (struct window *w, int vpos, bool *mouse_face_overwritten_p) | |
5f5c8ee5 GM |
3770 | { |
3771 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
3772 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3773 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
59ea14cd | 3774 | bool changed_p = 0; |
5f5c8ee5 | 3775 | |
177c0ea7 JB |
3776 | /* A row can be completely invisible in case a desired matrix was |
3777 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
3778 | the matrix. Make sure to make such rows current anyway, since |
3779 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
3780 | if (desired_row->mode_line_p |
3781 | || desired_row->visible_height > 0) | |
408f5064 | 3782 | { |
a54e2c05 | 3783 | eassert (desired_row->enabled_p); |
504805ac GM |
3784 | |
3785 | /* Update display of the left margin area, if there is one. */ | |
eeaf9bf3 | 3786 | if (!desired_row->full_width_p && w->left_margin_cols > 0) |
504805ac GM |
3787 | { |
3788 | changed_p = 1; | |
7f780da6 | 3789 | update_marginal_area (w, desired_row, LEFT_MARGIN_AREA, vpos); |
e9957956 EZ |
3790 | /* Setting this flag will ensure the vertical border, if |
3791 | any, between this window and the one on its left will be | |
3792 | redrawn. This is necessary because updating the left | |
3793 | margin area can potentially draw over the border. */ | |
3794 | current_row->redraw_fringe_bitmaps_p = 1; | |
504805ac | 3795 | } |
177c0ea7 | 3796 | |
504805ac | 3797 | /* Update the display of the text area. */ |
7f780da6 | 3798 | if (update_text_area (w, desired_row, vpos)) |
504805ac GM |
3799 | { |
3800 | changed_p = 1; | |
3801 | if (current_row->mouse_face_p) | |
3802 | *mouse_face_overwritten_p = 1; | |
3803 | } | |
177c0ea7 | 3804 | |
504805ac | 3805 | /* Update display of the right margin area, if there is one. */ |
eeaf9bf3 | 3806 | if (!desired_row->full_width_p && w->right_margin_cols > 0) |
504805ac GM |
3807 | { |
3808 | changed_p = 1; | |
7f780da6 | 3809 | update_marginal_area (w, desired_row, RIGHT_MARGIN_AREA, vpos); |
504805ac | 3810 | } |
177c0ea7 | 3811 | |
504805ac GM |
3812 | /* Draw truncation marks etc. */ |
3813 | if (!current_row->enabled_p | |
3814 | || desired_row->y != current_row->y | |
3815 | || desired_row->visible_height != current_row->visible_height | |
6b61353c | 3816 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 3817 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
6b61353c | 3818 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 3819 | || desired_row->mode_line_p != current_row->mode_line_p |
6b61353c | 3820 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
3821 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
3822 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
65620264 | 3823 | rif->after_update_window_line_hook (w, desired_row); |
408f5064 | 3824 | } |
177c0ea7 | 3825 | |
5f5c8ee5 GM |
3826 | /* Update current_row from desired_row. */ |
3827 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
408f5064 | 3828 | return changed_p; |
5f5c8ee5 GM |
3829 | } |
3830 | ||
3831 | ||
3832 | /* Set the cursor after an update of window W. This function may only | |
3833 | be called from update_window. */ | |
3834 | ||
3835 | static void | |
971de7fb | 3836 | set_window_cursor_after_update (struct window *w) |
4588ec20 | 3837 | { |
d3d50620 | 3838 | struct frame *f = XFRAME (w->frame); |
5f5c8ee5 GM |
3839 | int cx, cy, vpos, hpos; |
3840 | ||
3841 | /* Not intended for frame matrix updates. */ | |
a54e2c05 | 3842 | eassert (FRAME_WINDOW_P (f)); |
177c0ea7 | 3843 | |
b96fd3e8 GM |
3844 | if (cursor_in_echo_area |
3845 | && !NILP (echo_area_buffer[0]) | |
3846 | /* If we are showing a message instead of the mini-buffer, | |
3847 | show the cursor for the message instead. */ | |
3848 | && XWINDOW (minibuf_window) == w | |
3849 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
3850 | /* These cases apply only to the frame that contains |
3851 | the active mini-buffer window. */ | |
3852 | && FRAME_HAS_MINIBUF_P (f) | |
3853 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
3854 | { | |
3855 | cx = cy = vpos = hpos = 0; | |
3856 | ||
3857 | if (cursor_in_echo_area >= 0) | |
3858 | { | |
3859 | /* If the mini-buffer is several lines high, find the last | |
3860 | line that has any text on it. Note: either all lines | |
3861 | are enabled or none. Otherwise we wouldn't be able to | |
3862 | determine Y. */ | |
862b4790 GM |
3863 | struct glyph_row *row, *last_row; |
3864 | struct glyph *glyph; | |
3865 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 3866 | |
862b4790 | 3867 | last_row = NULL; |
6206f8ce GM |
3868 | row = w->current_matrix->rows; |
3869 | while (row->enabled_p | |
3870 | && (last_row == NULL | |
3871 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 3872 | { |
862b4790 GM |
3873 | if (row->used[TEXT_AREA] |
3874 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
3875 | last_row = row; | |
6206f8ce | 3876 | ++row; |
862b4790 | 3877 | } |
177c0ea7 | 3878 | |
5f5c8ee5 GM |
3879 | if (last_row) |
3880 | { | |
6206f8ce GM |
3881 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
3882 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 3883 | |
b96fd3e8 | 3884 | while (last > start && last->charpos < 0) |
862b4790 | 3885 | --last; |
177c0ea7 | 3886 | |
862b4790 GM |
3887 | for (glyph = start; glyph < last; ++glyph) |
3888 | { | |
3889 | cx += glyph->pixel_width; | |
3890 | ++hpos; | |
3891 | } | |
3892 | ||
5f5c8ee5 | 3893 | cy = last_row->y; |
862b4790 | 3894 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
3895 | } |
3896 | } | |
3897 | } | |
3898 | else | |
3899 | { | |
3900 | cx = w->cursor.x; | |
3901 | cy = w->cursor.y; | |
3902 | hpos = w->cursor.hpos; | |
3903 | vpos = w->cursor.vpos; | |
3904 | } | |
4588ec20 | 3905 | |
2dd61a9b | 3906 | /* Window cursor can be out of sync for horizontally split windows. |
cccaebd2 | 3907 | Horizontal position is -1 when cursor is on the left fringe. */ |
2dd61a9b DA |
3908 | hpos = clip_to_bounds (-1, hpos, w->current_matrix->matrix_w - 1); |
3909 | vpos = clip_to_bounds (0, vpos, w->current_matrix->nrows - 1); | |
f60e429a | 3910 | output_cursor_to (w, vpos, hpos, cy, cx); |
4588ec20 | 3911 | } |
4588ec20 | 3912 | |
5f5c8ee5 | 3913 | |
44ad1cf7 SM |
3914 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in |
3915 | the window tree rooted at W. */ | |
6df5d75f | 3916 | |
44ad1cf7 SM |
3917 | static void |
3918 | set_window_update_flags (struct window *w, bool on_p) | |
6df5d75f GM |
3919 | { |
3920 | while (w) | |
3921 | { | |
e74aeda8 | 3922 | if (WINDOWP (w->contents)) |
44ad1cf7 SM |
3923 | set_window_update_flags (XWINDOW (w->contents), on_p); |
3924 | else | |
6df5d75f GM |
3925 | w->must_be_updated_p = on_p; |
3926 | ||
d3d50620 | 3927 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
6df5d75f | 3928 | } |
177c0ea7 | 3929 | } |
6df5d75f GM |
3930 | |
3931 | ||
3932 | \f | |
3933 | /*********************************************************************** | |
3934 | Window-Based Scrolling | |
3935 | ***********************************************************************/ | |
3936 | ||
3937 | /* Structure describing rows in scrolling_window. */ | |
3938 | ||
3939 | struct row_entry | |
3940 | { | |
3941 | /* Number of occurrences of this row in desired and current matrix. */ | |
3942 | int old_uses, new_uses; | |
177c0ea7 | 3943 | |
6df5d75f GM |
3944 | /* Vpos of row in new matrix. */ |
3945 | int new_line_number; | |
3946 | ||
3947 | /* Bucket index of this row_entry in the hash table row_table. */ | |
ca9ce8f2 | 3948 | ptrdiff_t bucket; |
177c0ea7 | 3949 | |
6df5d75f GM |
3950 | /* The row described by this entry. */ |
3951 | struct glyph_row *row; | |
177c0ea7 | 3952 | |
6df5d75f GM |
3953 | /* Hash collision chain. */ |
3954 | struct row_entry *next; | |
3955 | }; | |
3956 | ||
3957 | /* A pool to allocate row_entry structures from, and the size of the | |
3958 | pool. The pool is reallocated in scrolling_window when we find | |
3959 | that we need a larger one. */ | |
3960 | ||
3961 | static struct row_entry *row_entry_pool; | |
ca9ce8f2 | 3962 | static ptrdiff_t row_entry_pool_size; |
6df5d75f GM |
3963 | |
3964 | /* Index of next free entry in row_entry_pool. */ | |
3965 | ||
ca9ce8f2 | 3966 | static ptrdiff_t row_entry_idx; |
6df5d75f GM |
3967 | |
3968 | /* The hash table used during scrolling, and the table's size. This | |
3969 | table is used to quickly identify equal rows in the desired and | |
3970 | current matrix. */ | |
3971 | ||
3972 | static struct row_entry **row_table; | |
ca9ce8f2 | 3973 | static ptrdiff_t row_table_size; |
6df5d75f GM |
3974 | |
3975 | /* Vectors of pointers to row_entry structures belonging to the | |
3976 | current and desired matrix, and the size of the vectors. */ | |
3977 | ||
3978 | static struct row_entry **old_lines, **new_lines; | |
0065d054 | 3979 | static ptrdiff_t old_lines_size, new_lines_size; |
6df5d75f GM |
3980 | |
3981 | /* A pool to allocate run structures from, and its size. */ | |
3982 | ||
3983 | static struct run *run_pool; | |
0065d054 | 3984 | static ptrdiff_t runs_size; |
6df5d75f GM |
3985 | |
3986 | /* A vector of runs of lines found during scrolling. */ | |
3987 | ||
3988 | static struct run **runs; | |
3989 | ||
6b1f9ba4 | 3990 | /* Add glyph row ROW to the scrolling hash table. */ |
6df5d75f | 3991 | |
b0ab8123 | 3992 | static struct row_entry * |
6b1f9ba4 | 3993 | add_row_entry (struct glyph_row *row) |
6df5d75f GM |
3994 | { |
3995 | struct row_entry *entry; | |
ca9ce8f2 | 3996 | ptrdiff_t i = row->hash % row_table_size; |
177c0ea7 | 3997 | |
6df5d75f | 3998 | entry = row_table[i]; |
a54e2c05 | 3999 | eassert (entry || verify_row_hash (row)); |
6b1f9ba4 | 4000 | while (entry && !row_equal_p (entry->row, row, 1)) |
6df5d75f | 4001 | entry = entry->next; |
177c0ea7 | 4002 | |
6df5d75f GM |
4003 | if (entry == NULL) |
4004 | { | |
4005 | entry = row_entry_pool + row_entry_idx++; | |
4006 | entry->row = row; | |
4007 | entry->old_uses = entry->new_uses = 0; | |
4008 | entry->new_line_number = 0; | |
4009 | entry->bucket = i; | |
4010 | entry->next = row_table[i]; | |
4011 | row_table[i] = entry; | |
4012 | } | |
4013 | ||
4014 | return entry; | |
4015 | } | |
4016 | ||
4017 | ||
5f5c8ee5 | 4018 | /* Try to reuse part of the current display of W by scrolling lines. |
59ea14cd | 4019 | HEADER_LINE_P means W has a header line. |
5f5c8ee5 GM |
4020 | |
4021 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4022 | Technique for Isolating Differences Between Files." It should take | |
4023 | O(N) time. | |
4024 | ||
4025 | A short outline of the steps of the algorithm | |
4026 | ||
4027 | 1. Skip lines equal at the start and end of both matrices. | |
4028 | ||
4029 | 2. Enter rows in the current and desired matrix into a symbol | |
4030 | table, counting how often they appear in both matrices. | |
4031 | ||
4032 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4033 | i.e. we assume that such lines are likely to have been moved. | |
4034 | ||
4035 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4036 | forward and backward. | |
4037 | ||
4038 | Value is | |
4039 | ||
4040 | -1 if all rows were found to be equal. | |
4041 | 0 to indicate that we did not scroll the display, or | |
4042 | 1 if we did scroll. */ | |
4043 | ||
4044 | static int | |
59ea14cd | 4045 | scrolling_window (struct window *w, bool header_line_p) |
4588ec20 | 4046 | { |
5f5c8ee5 GM |
4047 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4048 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4049 | int yb = window_text_bottom_y (w); | |
ca9ce8f2 PE |
4050 | ptrdiff_t i; |
4051 | int j, first_old, first_new, last_old, last_new; | |
4052 | int nruns, run_idx; | |
0065d054 | 4053 | ptrdiff_t n; |
6df5d75f | 4054 | struct row_entry *entry; |
fa971ac3 | 4055 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4056 | |
4057 | /* Skip over rows equal at the start. */ | |
59ea14cd | 4058 | for (i = header_line_p; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4059 | { |
bfdcafe1 GM |
4060 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4061 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4062 | ||
4063 | if (c->enabled_p | |
4064 | && d->enabled_p | |
6b61353c | 4065 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4066 | && c->y == d->y |
4067 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4068 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
6b1f9ba4 | 4069 | && row_equal_p (c, d, 1)) |
bfdcafe1 GM |
4070 | { |
4071 | assign_row (c, d); | |
96c06863 | 4072 | d->enabled_p = false; |
bfdcafe1 GM |
4073 | } |
4074 | else | |
4075 | break; | |
5f5c8ee5 | 4076 | } |
4588ec20 | 4077 | |
5f5c8ee5 | 4078 | /* Give up if some rows in the desired matrix are not enabled. */ |
96c06863 | 4079 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
5f5c8ee5 | 4080 | return -1; |
177c0ea7 | 4081 | |
5f5c8ee5 GM |
4082 | first_old = first_new = i; |
4083 | ||
4d8ade89 YM |
4084 | /* Set last_new to the index + 1 of the row that reaches the |
4085 | bottom boundary in the desired matrix. Give up if we find a | |
4086 | disabled row before we reach the bottom boundary. */ | |
5f5c8ee5 | 4087 | i = first_new + 1; |
4d8ade89 YM |
4088 | while (i < desired_matrix->nrows - 1) |
4089 | { | |
4090 | int bottom; | |
5f5c8ee5 | 4091 | |
96c06863 | 4092 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4d8ade89 YM |
4093 | return 0; |
4094 | bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)); | |
4095 | if (bottom <= yb) | |
4096 | ++i; | |
4097 | if (bottom >= yb) | |
4098 | break; | |
4099 | } | |
5f5c8ee5 GM |
4100 | |
4101 | last_new = i; | |
4102 | ||
4d8ade89 YM |
4103 | /* Set last_old to the index + 1 of the row that reaches the bottom |
4104 | boundary in the current matrix. We don't look at the enabled | |
4105 | flag here because we plan to reuse part of the display even if | |
4106 | other parts are disabled. */ | |
5f5c8ee5 | 4107 | i = first_old + 1; |
93962bfa GM |
4108 | while (i < current_matrix->nrows - 1) |
4109 | { | |
4110 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4111 | if (bottom <= yb) | |
4112 | ++i; | |
4113 | if (bottom >= yb) | |
4114 | break; | |
4115 | } | |
4116 | ||
5f5c8ee5 GM |
4117 | last_old = i; |
4118 | ||
4119 | /* Skip over rows equal at the bottom. */ | |
4120 | i = last_new; | |
4121 | j = last_old; | |
4122 | while (i - 1 > first_new | |
4123 | && j - 1 > first_old | |
96c06863 | 4124 | && MATRIX_ROW_ENABLED_P (current_matrix, j - 1) |
1e5b2111 EZ |
4125 | && (MATRIX_ROW (current_matrix, j - 1)->y |
4126 | == MATRIX_ROW (desired_matrix, i - 1)->y) | |
4127 | && !MATRIX_ROW (desired_matrix, i - 1)->redraw_fringe_bitmaps_p | |
6b1f9ba4 | 4128 | && row_equal_p (MATRIX_ROW (desired_matrix, i - 1), |
e4e0bee9 | 4129 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
4130 | --i, --j; |
4131 | last_new = i; | |
4132 | last_old = j; | |
4133 | ||
4134 | /* Nothing to do if all rows are equal. */ | |
4135 | if (last_new == first_new) | |
4136 | return 0; | |
4137 | ||
0065d054 | 4138 | /* Check for integer overflow in size calculation. |
ca9ce8f2 PE |
4139 | |
4140 | If next_almost_prime checks (N) for divisibility by 2..10, then | |
4141 | it can return at most N + 10, e.g., next_almost_prime (1) == 11. | |
4142 | So, set next_almost_prime_increment_max to 10. | |
4143 | ||
4144 | It's just a coincidence that next_almost_prime_increment_max == | |
4145 | NEXT_ALMOST_PRIME_LIMIT - 1. If NEXT_ALMOST_PRIME_LIMIT were | |
4146 | 13, then next_almost_prime_increment_max would be 14, e.g., | |
4147 | because next_almost_prime (113) would be 127. */ | |
4148 | { | |
4149 | verify (NEXT_ALMOST_PRIME_LIMIT == 11); | |
4150 | enum { next_almost_prime_increment_max = 10 }; | |
ca9ce8f2 | 4151 | ptrdiff_t row_table_max = |
0065d054 PE |
4152 | (min (PTRDIFF_MAX, SIZE_MAX) / (3 * sizeof *row_table) |
4153 | - next_almost_prime_increment_max); | |
4154 | ptrdiff_t current_nrows_max = row_table_max - desired_matrix->nrows; | |
4155 | if (current_nrows_max < current_matrix->nrows) | |
ca9ce8f2 PE |
4156 | memory_full (SIZE_MAX); |
4157 | } | |
4158 | ||
6df5d75f | 4159 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 4160 | |
6df5d75f | 4161 | if (current_matrix->nrows > old_lines_size) |
0065d054 PE |
4162 | old_lines = xpalloc (old_lines, &old_lines_size, |
4163 | current_matrix->nrows - old_lines_size, | |
4164 | INT_MAX, sizeof *old_lines); | |
177c0ea7 | 4165 | |
6df5d75f | 4166 | if (desired_matrix->nrows > new_lines_size) |
0065d054 PE |
4167 | new_lines = xpalloc (new_lines, &new_lines_size, |
4168 | desired_matrix->nrows - new_lines_size, | |
4169 | INT_MAX, sizeof *new_lines); | |
6df5d75f | 4170 | |
ca9ce8f2 PE |
4171 | n = desired_matrix->nrows; |
4172 | n += current_matrix->nrows; | |
0065d054 | 4173 | if (row_table_size < 3 * n) |
6df5d75f | 4174 | { |
ca9ce8f2 | 4175 | ptrdiff_t size = next_almost_prime (3 * n); |
0065d054 | 4176 | row_table = xnrealloc (row_table, size, sizeof *row_table); |
ca9ce8f2 | 4177 | row_table_size = size; |
0065d054 | 4178 | memset (row_table, 0, size * sizeof *row_table); |
6df5d75f GM |
4179 | } |
4180 | ||
4181 | if (n > row_entry_pool_size) | |
0065d054 PE |
4182 | row_entry_pool = xpalloc (row_entry_pool, &row_entry_pool_size, |
4183 | n - row_entry_pool_size, | |
4184 | -1, sizeof *row_entry_pool); | |
6df5d75f GM |
4185 | |
4186 | if (desired_matrix->nrows > runs_size) | |
4187 | { | |
0065d054 PE |
4188 | runs = xnrealloc (runs, desired_matrix->nrows, sizeof *runs); |
4189 | run_pool = xnrealloc (run_pool, desired_matrix->nrows, sizeof *run_pool); | |
ca9ce8f2 | 4190 | runs_size = desired_matrix->nrows; |
6df5d75f GM |
4191 | } |
4192 | ||
4193 | nruns = run_idx = 0; | |
4194 | row_entry_idx = 0; | |
4195 | ||
4196 | /* Add rows from the current and desired matrix to the hash table | |
4197 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 4198 | |
5f5c8ee5 GM |
4199 | for (i = first_old; i < last_old; ++i) |
4200 | { | |
96c06863 | 4201 | if (MATRIX_ROW_ENABLED_P (current_matrix, i)) |
5f5c8ee5 | 4202 | { |
6b1f9ba4 | 4203 | entry = add_row_entry (MATRIX_ROW (current_matrix, i)); |
6df5d75f GM |
4204 | old_lines[i] = entry; |
4205 | ++entry->old_uses; | |
5f5c8ee5 GM |
4206 | } |
4207 | else | |
6df5d75f | 4208 | old_lines[i] = NULL; |
5f5c8ee5 GM |
4209 | } |
4210 | ||
5f5c8ee5 GM |
4211 | for (i = first_new; i < last_new; ++i) |
4212 | { | |
a54e2c05 | 4213 | eassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); |
6b1f9ba4 | 4214 | entry = add_row_entry (MATRIX_ROW (desired_matrix, i)); |
6df5d75f GM |
4215 | ++entry->new_uses; |
4216 | entry->new_line_number = i; | |
4217 | new_lines[i] = entry; | |
5f5c8ee5 | 4218 | } |
4588ec20 | 4219 | |
5f5c8ee5 GM |
4220 | /* Identify moves based on lines that are unique and equal |
4221 | in both matrices. */ | |
4222 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
4223 | if (old_lines[i] |
4224 | && old_lines[i]->old_uses == 1 | |
4225 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 | 4226 | { |
27786b2f | 4227 | int p, q; |
6df5d75f GM |
4228 | int new_line = old_lines[i]->new_line_number; |
4229 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
4230 | |
4231 | /* Record move. */ | |
4232 | run->current_vpos = i; | |
4233 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
4234 | run->desired_vpos = new_line; | |
4235 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
4236 | run->nrows = 1; | |
4237 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
4238 | ||
4239 | /* Extend backward. */ | |
27786b2f PE |
4240 | p = i - 1; |
4241 | q = new_line - 1; | |
4242 | while (p > first_old | |
4243 | && q > first_new | |
4244 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4245 | { |
27786b2f | 4246 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 JB |
4247 | --run->current_vpos; |
4248 | --run->desired_vpos; | |
5f5c8ee5 GM |
4249 | ++run->nrows; |
4250 | run->height += h; | |
4251 | run->desired_y -= h; | |
4252 | run->current_y -= h; | |
27786b2f | 4253 | --p, --q; |
5f5c8ee5 | 4254 | } |
4588ec20 | 4255 | |
5f5c8ee5 | 4256 | /* Extend forward. */ |
27786b2f PE |
4257 | p = i + 1; |
4258 | q = new_line + 1; | |
4259 | while (p < last_old | |
4260 | && q < last_new | |
4261 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4262 | { |
27786b2f | 4263 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 | 4264 | ++run->nrows; |
5f5c8ee5 | 4265 | run->height += h; |
27786b2f | 4266 | ++p, ++q; |
5f5c8ee5 | 4267 | } |
19dff8dc | 4268 | |
5f5c8ee5 GM |
4269 | /* Insert run into list of all runs. Order runs by copied |
4270 | pixel lines. Note that we record runs that don't have to | |
4271 | be copied because they are already in place. This is done | |
4272 | because we can avoid calling update_window_line in this | |
4273 | case. */ | |
27786b2f | 4274 | for (p = 0; p < nruns && runs[p]->height > run->height; ++p) |
5f5c8ee5 | 4275 | ; |
27786b2f PE |
4276 | for (q = nruns; q > p; --q) |
4277 | runs[q] = runs[q - 1]; | |
4278 | runs[p] = run; | |
5f5c8ee5 GM |
4279 | ++nruns; |
4280 | ||
4281 | i += run->nrows; | |
4282 | } | |
4283 | else | |
4284 | ++i; | |
4588ec20 | 4285 | |
5f5c8ee5 GM |
4286 | /* Do the moves. Do it in a way that we don't overwrite something |
4287 | we want to copy later on. This is not solvable in general | |
4288 | because there is only one display and we don't have a way to | |
4289 | exchange areas on this display. Example: | |
4588ec20 | 4290 | |
5f5c8ee5 GM |
4291 | +-----------+ +-----------+ |
4292 | | A | | B | | |
4293 | +-----------+ --> +-----------+ | |
4294 | | B | | A | | |
4295 | +-----------+ +-----------+ | |
4588ec20 | 4296 | |
5f5c8ee5 GM |
4297 | Instead, prefer bigger moves, and invalidate moves that would |
4298 | copy from where we copied to. */ | |
ea0d86af | 4299 | |
5f5c8ee5 GM |
4300 | for (i = 0; i < nruns; ++i) |
4301 | if (runs[i]->nrows > 0) | |
4302 | { | |
4303 | struct run *r = runs[i]; | |
24e86043 | 4304 | |
5f5c8ee5 GM |
4305 | /* Copy on the display. */ |
4306 | if (r->current_y != r->desired_y) | |
4307 | { | |
989b42d2 | 4308 | rif->clear_window_mouse_face (w); |
5f5c8ee5 | 4309 | rif->scroll_run_hook (w, r); |
1305621b | 4310 | } |
5f5c8ee5 | 4311 | |
1305621b YM |
4312 | /* Truncate runs that copy to where we copied to, and |
4313 | invalidate runs that copy from where we copied to. */ | |
4314 | for (j = nruns - 1; j > i; --j) | |
4315 | { | |
4316 | struct run *p = runs[j]; | |
59ea14cd | 4317 | bool truncated_p = 0; |
5f5c8ee5 | 4318 | |
1305621b YM |
4319 | if (p->nrows > 0 |
4320 | && p->desired_y < r->desired_y + r->height | |
4321 | && p->desired_y + p->height > r->desired_y) | |
5f5c8ee5 | 4322 | { |
1305621b YM |
4323 | if (p->desired_y < r->desired_y) |
4324 | { | |
4325 | p->nrows = r->desired_vpos - p->desired_vpos; | |
4326 | p->height = r->desired_y - p->desired_y; | |
4327 | truncated_p = 1; | |
4328 | } | |
4329 | else | |
4330 | { | |
4331 | int nrows_copied = (r->desired_vpos + r->nrows | |
4332 | - p->desired_vpos); | |
4333 | ||
4334 | if (p->nrows <= nrows_copied) | |
4335 | p->nrows = 0; | |
4336 | else | |
4337 | { | |
4338 | int height_copied = (r->desired_y + r->height | |
4339 | - p->desired_y); | |
4340 | ||
4341 | p->current_vpos += nrows_copied; | |
4342 | p->desired_vpos += nrows_copied; | |
4343 | p->nrows -= nrows_copied; | |
4344 | p->current_y += height_copied; | |
4345 | p->desired_y += height_copied; | |
4346 | p->height -= height_copied; | |
4347 | truncated_p = 1; | |
4348 | } | |
4349 | } | |
4350 | } | |
177c0ea7 | 4351 | |
1305621b YM |
4352 | if (r->current_y != r->desired_y |
4353 | /* The condition below is equivalent to | |
4354 | ((p->current_y >= r->desired_y | |
5f5c8ee5 | 4355 | && p->current_y < r->desired_y + r->height) |
1305621b | 4356 | || (p->current_y + p->height > r->desired_y |
5f5c8ee5 | 4357 | && (p->current_y + p->height |
1305621b YM |
4358 | <= r->desired_y + r->height))) |
4359 | because we have 0 < p->height <= r->height. */ | |
4360 | && p->current_y < r->desired_y + r->height | |
4361 | && p->current_y + p->height > r->desired_y) | |
4362 | p->nrows = 0; | |
4363 | ||
4364 | /* Reorder runs by copied pixel lines if truncated. */ | |
4365 | if (truncated_p && p->nrows > 0) | |
4366 | { | |
4367 | int k = nruns - 1; | |
4368 | ||
4369 | while (runs[k]->nrows == 0 || runs[k]->height < p->height) | |
4370 | k--; | |
4371 | memmove (runs + j, runs + j + 1, (k - j) * sizeof (*runs)); | |
4372 | runs[k] = p; | |
5f5c8ee5 GM |
4373 | } |
4374 | } | |
ea0d86af | 4375 | |
5f5c8ee5 GM |
4376 | /* Assign matrix rows. */ |
4377 | for (j = 0; j < r->nrows; ++j) | |
4378 | { | |
4379 | struct glyph_row *from, *to; | |
59ea14cd | 4380 | bool to_overlapped_p; |
e876ff42 | 4381 | |
5f5c8ee5 GM |
4382 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
4383 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 4384 | to_overlapped_p = to->overlapped_p; |
e61124cd | 4385 | from->redraw_fringe_bitmaps_p = from->fringe_bitmap_periodic_p; |
5f5c8ee5 | 4386 | assign_row (to, from); |
1305621b YM |
4387 | /* The above `assign_row' actually does swap, so if we had |
4388 | an overlap in the copy destination of two runs, then | |
4389 | the second run would assign a previously disabled bogus | |
4390 | row. But thanks to the truncation code in the | |
4391 | preceding for-loop, we no longer have such an overlap, | |
4392 | and thus the assigned row should always be enabled. */ | |
a54e2c05 | 4393 | eassert (to->enabled_p); |
96c06863 | 4394 | from->enabled_p = false; |
408f5064 | 4395 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
4396 | } |
4397 | } | |
15874c59 | 4398 | |
6df5d75f GM |
4399 | /* Clear the hash table, for the next time. */ |
4400 | for (i = 0; i < row_entry_idx; ++i) | |
4401 | row_table[row_entry_pool[i].bucket] = NULL; | |
4402 | ||
aec1708a | 4403 | /* Value is 1 to indicate that we scrolled the display. */ |
908589fd | 4404 | return nruns > 0; |
5f5c8ee5 | 4405 | } |
de83c314 | 4406 | |
15874c59 | 4407 | |
4588ec20 | 4408 | \f |
5f5c8ee5 GM |
4409 | /************************************************************************ |
4410 | Frame-Based Updates | |
4411 | ************************************************************************/ | |
4588ec20 | 4412 | |
5f5c8ee5 | 4413 | /* Update the desired frame matrix of frame F. |
4588ec20 | 4414 | |
59ea14cd PE |
4415 | FORCE_P means that the update should not be stopped by pending input. |
4416 | INHIBIT_HAIRY_ID_P means that scrolling should not be tried. | |
5f5c8ee5 | 4417 | |
59ea14cd | 4418 | Value is true if update was stopped due to pending input. */ |
5f5c8ee5 | 4419 | |
59ea14cd PE |
4420 | static bool |
4421 | update_frame_1 (struct frame *f, bool force_p, bool inhibit_id_p) | |
4588ec20 | 4422 | { |
5f5c8ee5 GM |
4423 | /* Frame matrices to work on. */ |
4424 | struct glyph_matrix *current_matrix = f->current_matrix; | |
4425 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
4426 | int i; | |
59ea14cd | 4427 | bool pause_p; |
4588ec20 | 4428 | int preempt_count = baud_rate / 2400 + 1; |
5f5c8ee5 | 4429 | |
a54e2c05 | 4430 | eassert (current_matrix && desired_matrix); |
4588ec20 | 4431 | |
c37e4889 RS |
4432 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
4433 | calculate_costs (f); | |
4434 | ||
d88c2b9e RS |
4435 | if (preempt_count <= 0) |
4436 | preempt_count = 1; | |
4437 | ||
a2130dbb | 4438 | if (!force_p && detect_input_pending_ignore_squeezables ()) |
4588ec20 | 4439 | { |
27786b2f | 4440 | pause_p = 1; |
4588ec20 JB |
4441 | goto do_pause; |
4442 | } | |
4443 | ||
5f5c8ee5 | 4444 | /* If we cannot insert/delete lines, it's no use trying it. */ |
daf01701 | 4445 | if (!FRAME_LINE_INS_DEL_OK (f)) |
5f5c8ee5 | 4446 | inhibit_id_p = 1; |
7098a0fa | 4447 | |
efb859b4 | 4448 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
4449 | i/d line if just want cursor motion. */ |
4450 | for (i = 0; i < desired_matrix->nrows; i++) | |
4451 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
4452 | break; |
4453 | ||
4454 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
4455 | if (!inhibit_id_p && i < desired_matrix->nrows) |
4456 | force_p |= scrolling (f); | |
4588ec20 JB |
4457 | |
4458 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
4459 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
4460 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 4461 | |
5f5c8ee5 GM |
4462 | /* Now update the rest of the lines. */ |
4463 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 4464 | { |
5f5c8ee5 | 4465 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 4466 | { |
b6a65ac2 | 4467 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
4468 | { |
4469 | /* Flush out every so many lines. | |
4470 | Also flush out if likely to have more than 1k buffered | |
4471 | otherwise. I'm told that some telnet connections get | |
4472 | really screwed by more than 1k output at once. */ | |
fced92f1 CY |
4473 | FILE *display_output = FRAME_TTY (f)->output; |
4474 | if (display_output) | |
4588ec20 | 4475 | { |
8148369c | 4476 | ptrdiff_t outq = __fpending (display_output); |
fced92f1 CY |
4477 | if (outq > 900 |
4478 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
06b63c9b | 4479 | fflush (display_output); |
4588ec20 | 4480 | } |
4588ec20 JB |
4481 | } |
4482 | ||
d012c62b | 4483 | if (!force_p && (i - 1) % preempt_count == 0) |
a2d5fca0 | 4484 | detect_input_pending_ignore_squeezables (); |
a2960116 | 4485 | |
5f5c8ee5 | 4486 | update_frame_line (f, i); |
4588ec20 | 4487 | } |
4588ec20 | 4488 | } |
177c0ea7 | 4489 | |
59ea14cd | 4490 | pause_p = 0 < i && i < FRAME_LINES (f) - 1; |
4588ec20 JB |
4491 | |
4492 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
27786b2f | 4493 | if (!pause_p) |
4588ec20 | 4494 | { |
48cf7030 | 4495 | if ((cursor_in_echo_area |
5f5c8ee5 | 4496 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 4497 | show the cursor for the message instead of for the |
5f5c8ee5 | 4498 | (now hidden) mini-buffer contents. */ |
2577053b RS |
4499 | || (EQ (minibuf_window, selected_window) |
4500 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 4501 | && !NILP (echo_area_buffer[0]))) |
2577053b | 4502 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 4503 | the active mini-buffer window. */ |
2577053b | 4504 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 4505 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 4506 | { |
7df02016 | 4507 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
4508 | int row, col; |
4509 | ||
4510 | if (cursor_in_echo_area < 0) | |
4511 | { | |
5f5c8ee5 GM |
4512 | /* Negative value of cursor_in_echo_area means put |
4513 | cursor at beginning of line. */ | |
648fa17d JB |
4514 | row = top; |
4515 | col = 0; | |
4516 | } | |
1113d9db | 4517 | else |
648fa17d | 4518 | { |
5f5c8ee5 GM |
4519 | /* Positive value of cursor_in_echo_area means put |
4520 | cursor at the end of the prompt. If the mini-buffer | |
4521 | is several lines high, find the last line that has | |
4522 | any text on it. */ | |
7df02016 | 4523 | row = FRAME_LINES (f); |
177c0ea7 | 4524 | do |
648fa17d | 4525 | { |
5f5c8ee5 GM |
4526 | --row; |
4527 | col = 0; | |
177c0ea7 | 4528 | |
5f5c8ee5 GM |
4529 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
4530 | { | |
4531 | /* Frame rows are filled up with spaces that | |
4532 | must be ignored here. */ | |
5f5c8ee5 GM |
4533 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
4534 | row); | |
4535 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
4536 | struct glyph *last = start + r->used[TEXT_AREA]; | |
4537 | ||
4538 | while (last > start | |
4539 | && (last - 1)->charpos < 0) | |
4540 | --last; | |
177c0ea7 | 4541 | |
5f5c8ee5 GM |
4542 | col = last - start; |
4543 | } | |
648fa17d JB |
4544 | } |
4545 | while (row > top && col == 0); | |
4546 | ||
6395da5c | 4547 | /* Make sure COL is not out of range. */ |
868e640e | 4548 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 4549 | { |
6395da5c | 4550 | /* If we have another row, advance cursor into it. */ |
7df02016 | 4551 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 4552 | { |
7df02016 | 4553 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
4554 | row++; |
4555 | } | |
4556 | /* Otherwise move it back in range. */ | |
4557 | else | |
868e640e | 4558 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
4559 | } |
4560 | } | |
4561 | ||
385ed61f | 4562 | cursor_to (f, row, col); |
1113d9db | 4563 | } |
4588ec20 | 4564 | else |
5f5c8ee5 GM |
4565 | { |
4566 | /* We have only one cursor on terminal frames. Use it to | |
4567 | display the cursor of the selected window. */ | |
4568 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
4569 | if (w->cursor.vpos >= 0 |
4570 | /* The cursor vpos may be temporarily out of bounds | |
4571 | in the following situation: There is one window, | |
4572 | with the cursor in the lower half of it. The window | |
4573 | is split, and a message causes a redisplay before | |
4574 | a new cursor position has been computed. */ | |
7df02016 | 4575 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
4576 | { |
4577 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
4578 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
4579 | ||
eeaf9bf3 | 4580 | x += max (0, w->left_margin_cols); |
385ed61f | 4581 | cursor_to (f, y, x); |
5f5c8ee5 GM |
4582 | } |
4583 | } | |
4588ec20 JB |
4584 | } |
4585 | ||
4588ec20 JB |
4586 | do_pause: |
4587 | ||
5f5c8ee5 | 4588 | clear_desired_matrices (f); |
27786b2f | 4589 | return pause_p; |
4588ec20 JB |
4590 | } |
4591 | ||
4588ec20 | 4592 | |
5f5c8ee5 | 4593 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 4594 | |
59ea14cd | 4595 | static bool |
971de7fb | 4596 | scrolling (struct frame *frame) |
4588ec20 JB |
4597 | { |
4598 | int unchanged_at_top, unchanged_at_bottom; | |
4599 | int window_size; | |
4600 | int changed_lines; | |
38182d90 PE |
4601 | int *old_hash = alloca (FRAME_LINES (frame) * sizeof (int)); |
4602 | int *new_hash = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4603 | int *draw_cost = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4604 | int *old_draw_cost = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 4605 | register int i; |
7df02016 | 4606 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
4607 | struct glyph_matrix *current_matrix = frame->current_matrix; |
4608 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 4609 | |
77e3b1b7 | 4610 | eassert (current_matrix); |
4588ec20 | 4611 | |
5f5c8ee5 GM |
4612 | /* Compute hash codes of all the lines. Also calculate number of |
4613 | changed lines, number of unchanged lines at the beginning, and | |
4614 | number of unchanged lines at the end. */ | |
4588ec20 JB |
4615 | changed_lines = 0; |
4616 | unchanged_at_top = 0; | |
7df02016 KS |
4617 | unchanged_at_bottom = FRAME_LINES (frame); |
4618 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
4619 | { |
4620 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 4621 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 4622 | return 0; |
77e3b1b7 | 4623 | old_hash[i] = line_hash_code (frame, MATRIX_ROW (current_matrix, i)); |
5f5c8ee5 | 4624 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
f188b3c4 RS |
4625 | { |
4626 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
4627 | new_hash[i] = old_hash[i]; | |
4628 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
4629 | draw_cost[i] = INFINITY; | |
4630 | } | |
4588ec20 | 4631 | else |
f188b3c4 | 4632 | { |
77e3b1b7 DA |
4633 | new_hash[i] = line_hash_code (frame, MATRIX_ROW (desired_matrix, i)); |
4634 | draw_cost[i] = line_draw_cost (frame, desired_matrix, i); | |
f188b3c4 | 4635 | } |
4588ec20 JB |
4636 | |
4637 | if (old_hash[i] != new_hash[i]) | |
4638 | { | |
4639 | changed_lines++; | |
7df02016 | 4640 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
4641 | } |
4642 | else if (i == unchanged_at_top) | |
4643 | unchanged_at_top++; | |
77e3b1b7 | 4644 | old_draw_cost[i] = line_draw_cost (frame, current_matrix, i); |
4588ec20 JB |
4645 | } |
4646 | ||
4647 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
daf01701 | 4648 | if ((!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4649 | && changed_lines < baud_rate / 2400) |
7df02016 | 4650 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
4651 | return 1; |
4652 | ||
7df02016 | 4653 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
4654 | - unchanged_at_bottom); |
4655 | ||
daf01701 | 4656 | if (FRAME_SCROLL_REGION_OK (frame)) |
4588ec20 | 4657 | free_at_end_vpos -= unchanged_at_bottom; |
daf01701 | 4658 | else if (FRAME_MEMORY_BELOW_FRAME (frame)) |
4588ec20 JB |
4659 | free_at_end_vpos = -1; |
4660 | ||
4661 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 4662 | current frame and desired frame, don't bother with i/d calc. */ |
daf01701 | 4663 | if (!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4664 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
4665 | && (window_size >= |
4666 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 4667 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
4668 | old_hash, new_hash, draw_cost))) |
4669 | return 0; | |
4670 | ||
5f5c8ee5 GM |
4671 | if (window_size < 2) |
4672 | return 0; | |
4673 | ||
502b9b64 | 4674 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 4675 | draw_cost + unchanged_at_top - 1, |
190bb91a | 4676 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
4677 | old_hash + unchanged_at_top - 1, |
4678 | new_hash + unchanged_at_top - 1, | |
4679 | free_at_end_vpos - unchanged_at_top); | |
4680 | ||
4681 | return 0; | |
4682 | } | |
4588ec20 | 4683 | |
4588ec20 | 4684 | |
5f5c8ee5 GM |
4685 | /* Count the number of blanks at the start of the vector of glyphs R |
4686 | which is LEN glyphs long. */ | |
4588ec20 | 4687 | |
4588ec20 | 4688 | static int |
971de7fb | 4689 | count_blanks (struct glyph *r, int len) |
4588ec20 | 4690 | { |
5f5c8ee5 | 4691 | int i; |
177c0ea7 | 4692 | |
5f5c8ee5 GM |
4693 | for (i = 0; i < len; ++i) |
4694 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
4695 | break; | |
4696 | ||
4697 | return i; | |
4588ec20 JB |
4698 | } |
4699 | ||
5f5c8ee5 GM |
4700 | |
4701 | /* Count the number of glyphs in common at the start of the glyph | |
4702 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
4703 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
4704 | ||
4588ec20 | 4705 | static int |
971de7fb | 4706 | count_match (struct glyph *str1, struct glyph *end1, struct glyph *str2, struct glyph *end2) |
4588ec20 | 4707 | { |
5f5c8ee5 GM |
4708 | struct glyph *p1 = str1; |
4709 | struct glyph *p2 = str2; | |
177c0ea7 | 4710 | |
5f5c8ee5 GM |
4711 | while (p1 < end1 |
4712 | && p2 < end2 | |
42186983 | 4713 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 4714 | ++p1, ++p2; |
177c0ea7 | 4715 | |
5f5c8ee5 | 4716 | return p1 - str1; |
4588ec20 JB |
4717 | } |
4718 | ||
5f5c8ee5 | 4719 | |
4588ec20 | 4720 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 4721 | |
5e617bc2 | 4722 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS ((f))]) |
4588ec20 | 4723 | |
5f5c8ee5 GM |
4724 | |
4725 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
4726 | ||
4588ec20 | 4727 | static void |
971de7fb | 4728 | update_frame_line (struct frame *f, int vpos) |
4588ec20 | 4729 | { |
5f5c8ee5 | 4730 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
4731 | int tem; |
4732 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
4733 | struct glyph_matrix *current_matrix = f->current_matrix; |
4734 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
4735 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
4736 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
59ea14cd PE |
4737 | bool must_write_whole_line_p; |
4738 | bool write_spaces_p = FRAME_MUST_WRITE_SPACES (f); | |
4739 | bool colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background | |
4740 | != FACE_TTY_DEFAULT_BG_COLOR); | |
0a894bad GM |
4741 | |
4742 | if (colored_spaces_p) | |
4743 | write_spaces_p = 1; | |
5f5c8ee5 | 4744 | |
26c63686 GM |
4745 | /* Current row not enabled means it has unknown contents. We must |
4746 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
4747 | must_write_whole_line_p = !current_row->enabled_p; |
4748 | if (must_write_whole_line_p) | |
4588ec20 | 4749 | { |
5f5c8ee5 | 4750 | obody = 0; |
4588ec20 JB |
4751 | olen = 0; |
4752 | } | |
4753 | else | |
4754 | { | |
5f5c8ee5 GM |
4755 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
4756 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 4757 | |
4cecaab8 MB |
4758 | /* Ignore trailing spaces, if we can. */ |
4759 | if (!write_spaces_p) | |
4760 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
4761 | olen--; | |
4588ec20 JB |
4762 | } |
4763 | ||
96c06863 | 4764 | current_row->enabled_p = true; |
5f5c8ee5 | 4765 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; |
4588ec20 | 4766 | |
5f5c8ee5 GM |
4767 | /* If desired line is empty, just clear the line. */ |
4768 | if (!desired_row->enabled_p) | |
4588ec20 JB |
4769 | { |
4770 | nlen = 0; | |
4771 | goto just_erase; | |
4772 | } | |
4773 | ||
5f5c8ee5 GM |
4774 | nbody = desired_row->glyphs[TEXT_AREA]; |
4775 | nlen = desired_row->used[TEXT_AREA]; | |
4776 | nend = nbody + nlen; | |
4777 | ||
4778 | /* If display line has unknown contents, write the whole line. */ | |
4779 | if (must_write_whole_line_p) | |
4780 | { | |
26c63686 | 4781 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 4782 | if (!write_spaces_p) |
74ca462f GM |
4783 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
4784 | --nlen; | |
4785 | ||
26c63686 | 4786 | /* Write the contents of the desired line. */ |
74ca462f | 4787 | if (nlen) |
26c63686 | 4788 | { |
385ed61f KL |
4789 | cursor_to (f, vpos, 0); |
4790 | write_glyphs (f, nbody, nlen); | |
26c63686 | 4791 | } |
177c0ea7 | 4792 | |
26c63686 GM |
4793 | /* Don't call clear_end_of_line if we already wrote the whole |
4794 | line. The cursor will not be at the right margin in that | |
4795 | case but in the line below. */ | |
7df02016 | 4796 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 | 4797 | { |
385ed61f KL |
4798 | cursor_to (f, vpos, nlen); |
4799 | clear_end_of_line (f, FRAME_TOTAL_COLS (f)); | |
26c63686 | 4800 | } |
58827478 GM |
4801 | else |
4802 | /* Make sure we are in the right row, otherwise cursor movement | |
4803 | with cmgoto might use `ch' in the wrong row. */ | |
385ed61f | 4804 | cursor_to (f, vpos, 0); |
177c0ea7 | 4805 | |
5f5c8ee5 GM |
4806 | make_current (desired_matrix, current_matrix, vpos); |
4807 | return; | |
4808 | } | |
4588ec20 JB |
4809 | |
4810 | /* Pretend trailing spaces are not there at all, | |
4811 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
4812 | if (!write_spaces_p) |
4813 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
4814 | nlen--; | |
4588ec20 JB |
4815 | |
4816 | /* If there's no i/d char, quickly do the best we can without it. */ | |
daf01701 | 4817 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
4588ec20 | 4818 | { |
5f5c8ee5 | 4819 | int i, j; |
4588ec20 | 4820 | |
5f5c8ee5 GM |
4821 | /* Find the first glyph in desired row that doesn't agree with |
4822 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
4823 | for (i = 0; i < nlen; i++) |
4824 | { | |
5f5c8ee5 | 4825 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 4826 | { |
5f5c8ee5 GM |
4827 | /* Find the end of the run of different glyphs. */ |
4828 | j = i + 1; | |
4829 | while (j < nlen | |
4830 | && (j >= olen | |
4831 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
4832 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
4833 | ++j; | |
177c0ea7 JB |
4834 | |
4835 | /* Output this run of non-matching chars. */ | |
385ed61f KL |
4836 | cursor_to (f, vpos, i); |
4837 | write_glyphs (f, nbody + i, j - i); | |
5f5c8ee5 | 4838 | i = j - 1; |
4588ec20 JB |
4839 | |
4840 | /* Now find the next non-match. */ | |
4841 | } | |
4842 | } | |
4843 | ||
4844 | /* Clear the rest of the line, or the non-clear part of it. */ | |
4845 | if (olen > nlen) | |
4846 | { | |
385ed61f KL |
4847 | cursor_to (f, vpos, nlen); |
4848 | clear_end_of_line (f, olen); | |
4588ec20 JB |
4849 | } |
4850 | ||
5f5c8ee5 GM |
4851 | /* Make current row = desired row. */ |
4852 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
4853 | return; |
4854 | } | |
4855 | ||
5f5c8ee5 GM |
4856 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
4857 | characters in a row. */ | |
4858 | ||
4588ec20 JB |
4859 | if (!olen) |
4860 | { | |
5f5c8ee5 GM |
4861 | /* If current line is blank, skip over initial spaces, if |
4862 | possible, and write the rest. */ | |
4cecaab8 | 4863 | if (write_spaces_p) |
5f5c8ee5 GM |
4864 | nsp = 0; |
4865 | else | |
4866 | nsp = count_blanks (nbody, nlen); | |
4867 | ||
4588ec20 JB |
4868 | if (nlen > nsp) |
4869 | { | |
385ed61f KL |
4870 | cursor_to (f, vpos, nsp); |
4871 | write_glyphs (f, nbody + nsp, nlen - nsp); | |
4588ec20 JB |
4872 | } |
4873 | ||
502b9b64 | 4874 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 4875 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
4876 | return; |
4877 | } | |
4878 | ||
4588ec20 | 4879 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 4880 | osp = count_blanks (obody, olen); |
4cecaab8 | 4881 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 4882 | |
5f5c8ee5 GM |
4883 | /* Compute number of matching chars starting with first non-blank. */ |
4884 | begmatch = count_match (obody + osp, obody + olen, | |
4885 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
4886 | |
4887 | /* Spaces in new match implicit space past the end of old. */ | |
4888 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 4889 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
4890 | { |
4891 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
4892 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
4893 | ++begmatch; | |
4588ec20 JB |
4894 | } |
4895 | ||
4896 | /* Avoid doing insert/delete char | |
4897 | just cause number of leading spaces differs | |
5f5c8ee5 | 4898 | when the following text does not match. */ |
4588ec20 JB |
4899 | if (begmatch == 0 && osp != nsp) |
4900 | osp = nsp = min (osp, nsp); | |
4901 | ||
4902 | /* Find matching characters at end of line */ | |
4903 | op1 = obody + olen; | |
4904 | np1 = nbody + nlen; | |
4905 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
4906 | while (op1 > op2 |
4907 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
4908 | { |
4909 | op1--; | |
4910 | np1--; | |
4911 | } | |
4912 | endmatch = obody + olen - op1; | |
4913 | ||
4588ec20 JB |
4914 | /* tem gets the distance to insert or delete. |
4915 | endmatch is how many characters we save by doing so. | |
4916 | Is it worth it? */ | |
4917 | ||
4918 | tem = (nlen - nsp) - (olen - osp); | |
4919 | if (endmatch && tem | |
daf01701 | 4920 | && (!FRAME_CHAR_INS_DEL_OK (f) |
8a56675d | 4921 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
4922 | endmatch = 0; |
4923 | ||
4924 | /* nsp - osp is the distance to insert or delete. | |
4925 | If that is nonzero, begmatch is known to be nonzero also. | |
4926 | begmatch + endmatch is how much we save by doing the ins/del. | |
4927 | Is it worth it? */ | |
4928 | ||
4929 | if (nsp != osp | |
daf01701 | 4930 | && (!FRAME_CHAR_INS_DEL_OK (f) |
c363a1d6 | 4931 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
4932 | { |
4933 | begmatch = 0; | |
4934 | endmatch = 0; | |
4935 | osp = nsp = min (osp, nsp); | |
4936 | } | |
4937 | ||
4938 | /* Now go through the line, inserting, writing and | |
4939 | deleting as appropriate. */ | |
4940 | ||
4941 | if (osp > nsp) | |
4942 | { | |
385ed61f KL |
4943 | cursor_to (f, vpos, nsp); |
4944 | delete_glyphs (f, osp - nsp); | |
4588ec20 JB |
4945 | } |
4946 | else if (nsp > osp) | |
4947 | { | |
4948 | /* If going to delete chars later in line | |
4949 | and insert earlier in the line, | |
4950 | must delete first to avoid losing data in the insert */ | |
4951 | if (endmatch && nlen < olen + nsp - osp) | |
4952 | { | |
385ed61f KL |
4953 | cursor_to (f, vpos, nlen - endmatch + osp - nsp); |
4954 | delete_glyphs (f, olen + nsp - osp - nlen); | |
4588ec20 JB |
4955 | olen = nlen - (nsp - osp); |
4956 | } | |
385ed61f KL |
4957 | cursor_to (f, vpos, osp); |
4958 | insert_glyphs (f, 0, nsp - osp); | |
4588ec20 JB |
4959 | } |
4960 | olen += nsp - osp; | |
4961 | ||
4962 | tem = nsp + begmatch + endmatch; | |
4963 | if (nlen != tem || olen != tem) | |
4964 | { | |
4588ec20 JB |
4965 | if (!endmatch || nlen == olen) |
4966 | { | |
c363a1d6 GM |
4967 | /* If new text being written reaches right margin, there is |
4968 | no need to do clear-to-eol at the end of this function | |
4969 | (and it would not be safe, since cursor is not going to | |
4970 | be "at the margin" after the text is done). */ | |
7df02016 | 4971 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 4972 | olen = 0; |
c363a1d6 GM |
4973 | |
4974 | /* Function write_glyphs is prepared to do nothing | |
4975 | if passed a length <= 0. Check it here to avoid | |
4976 | unnecessary cursor movement. */ | |
4977 | if (nlen - tem > 0) | |
4978 | { | |
385ed61f KL |
4979 | cursor_to (f, vpos, nsp + begmatch); |
4980 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
c363a1d6 | 4981 | } |
4588ec20 JB |
4982 | } |
4983 | else if (nlen > olen) | |
4984 | { | |
24e86043 KH |
4985 | /* Here, we used to have the following simple code: |
4986 | ---------------------------------------- | |
4987 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
4988 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
4989 | ---------------------------------------- | |
4990 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
4991 | is a padding glyph. */ | |
4992 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
4993 | int del; | |
5f5c8ee5 | 4994 | |
385ed61f | 4995 | cursor_to (f, vpos, nsp + begmatch); |
177c0ea7 | 4996 | |
5f5c8ee5 | 4997 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
4998 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
4999 | out--; | |
385ed61f | 5000 | write_glyphs (f, nbody + nsp + begmatch, out); |
177c0ea7 | 5001 | |
5f5c8ee5 GM |
5002 | /* If we left columns to be overwritten, we must delete them. */ |
5003 | del = olen - tem - out; | |
c363a1d6 | 5004 | if (del > 0) |
385ed61f | 5005 | delete_glyphs (f, del); |
177c0ea7 | 5006 | |
5f5c8ee5 | 5007 | /* At last, we insert columns not yet written out. */ |
385ed61f | 5008 | insert_glyphs (f, nbody + nsp + begmatch + out, nlen - olen + del); |
5f5c8ee5 GM |
5009 | olen = nlen; |
5010 | } | |
5011 | else if (olen > nlen) | |
5012 | { | |
385ed61f KL |
5013 | cursor_to (f, vpos, nsp + begmatch); |
5014 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
5015 | delete_glyphs (f, olen - nlen); | |
5f5c8ee5 GM |
5016 | olen = nlen; |
5017 | } | |
bd9e3e75 | 5018 | } |
5f5c8ee5 GM |
5019 | |
5020 | just_erase: | |
5021 | /* If any unerased characters remain after the new line, erase them. */ | |
5022 | if (olen > nlen) | |
078b3696 | 5023 | { |
385ed61f KL |
5024 | cursor_to (f, vpos, nlen); |
5025 | clear_end_of_line (f, olen); | |
078b3696 | 5026 | } |
5f5c8ee5 GM |
5027 | |
5028 | /* Exchange contents between current_frame and new_frame. */ | |
5029 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5030 | } |
5f5c8ee5 GM |
5031 | |
5032 | ||
078b3696 | 5033 | \f |
5f5c8ee5 GM |
5034 | /*********************************************************************** |
5035 | X/Y Position -> Buffer Position | |
5036 | ***********************************************************************/ | |
5037 | ||
a1b0a6db | 5038 | /* Determine what's under window-relative pixel position (*X, *Y). |
2396cbba | 5039 | Return the OBJECT (string or buffer) that's there. |
6b61353c | 5040 | Return in *POS the position in that object. |
2396cbba EZ |
5041 | Adjust *X and *Y to character positions. |
5042 | Return in *DX and *DY the pixel coordinates of the click, | |
5043 | relative to the top left corner of OBJECT, or relative to | |
5044 | the top left corner of the character glyph at (*X, *Y) | |
5045 | if OBJECT is nil. | |
5046 | Return WIDTH and HEIGHT of the object at (*X, *Y), or zero | |
5047 | if the coordinates point to an empty area of the display. */ | |
5f5c8ee5 | 5048 | |
6b61353c | 5049 | Lisp_Object |
971de7fb | 5050 | 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 | 5051 | { |
5f5c8ee5 | 5052 | struct it it; |
707ea971 | 5053 | Lisp_Object old_current_buffer = Fcurrent_buffer (); |
5f5c8ee5 | 5054 | struct text_pos startp; |
6b61353c KH |
5055 | Lisp_Object string; |
5056 | struct glyph_row *row; | |
cedd7cd9 KS |
5057 | #ifdef HAVE_WINDOW_SYSTEM |
5058 | struct image *img = 0; | |
5059 | #endif | |
2396cbba | 5060 | int x0, x1, to_x; |
57b3e30b | 5061 | void *itdata = NULL; |
5f5c8ee5 | 5062 | |
707ea971 CY |
5063 | /* We used to set current_buffer directly here, but that does the |
5064 | wrong thing with `face-remapping-alist' (bug#2044). */ | |
e74aeda8 | 5065 | Fset_buffer (w->contents); |
57b3e30b | 5066 | itdata = bidi_shelve_cache (); |
cf91889a | 5067 | CLIP_TEXT_POS_FROM_MARKER (startp, w->start); |
5f5c8ee5 | 5068 | start_display (&it, w, startp); |
352ec8ff EZ |
5069 | /* start_display takes into account the header-line row, but IT's |
5070 | vpos still counts from the glyph row that includes the window's | |
5071 | start position. Adjust for a possible header-line row. */ | |
59ea14cd | 5072 | it.vpos += WINDOW_WANTS_HEADER_LINE_P (w); |
177c0ea7 | 5073 | |
9173a8fb | 5074 | x0 = *x; |
2396cbba EZ |
5075 | |
5076 | /* First, move to the beginning of the row corresponding to *Y. We | |
5077 | need to be in that row to get the correct value of base paragraph | |
40629f17 | 5078 | direction for the text at (*X, *Y). */ |
2396cbba EZ |
5079 | move_it_to (&it, -1, 0, *y, -1, MOVE_TO_X | MOVE_TO_Y); |
5080 | ||
5081 | /* TO_X is the pixel position that the iterator will compute for the | |
40629f17 EZ |
5082 | glyph at *X. We add it.first_visible_x because iterator |
5083 | positions include the hscroll. */ | |
2396cbba EZ |
5084 | to_x = x0 + it.first_visible_x; |
5085 | if (it.bidi_it.paragraph_dir == R2L) | |
5086 | /* For lines in an R2L paragraph, we need to mirror TO_X wrt the | |
5087 | text area. This is because the iterator, even in R2L | |
5088 | paragraphs, delivers glyphs as if they started at the left | |
5089 | margin of the window. (When we actually produce glyphs for | |
5090 | display, we reverse their order in PRODUCE_GLYPHS, but the | |
5091 | iterator doesn't know about that.) The following line adjusts | |
5092 | the pixel position to the iterator geometry, which is what | |
40629f17 EZ |
5093 | move_it_* routines use. (The -1 is because in a window whose |
5094 | text-area width is W, the rightmost pixel position is W-1, and | |
5095 | it should be mirrored into zero pixel position.) */ | |
5096 | to_x = window_box_width (w, TEXT_AREA) - to_x - 1; | |
5097 | ||
5098 | /* Now move horizontally in the row to the glyph under *X. Second | |
5099 | argument is ZV to prevent move_it_in_display_line from matching | |
5100 | based on buffer positions. */ | |
2396cbba | 5101 | move_it_in_display_line (&it, ZV, to_x, MOVE_TO_X); |
35928349 | 5102 | bidi_unshelve_cache (itdata, 0); |
177c0ea7 | 5103 | |
707ea971 | 5104 | Fset_buffer (old_current_buffer); |
a1b0a6db | 5105 | |
6b61353c KH |
5106 | *dx = x0 + it.first_visible_x - it.current_x; |
5107 | *dy = *y - it.current_y; | |
5108 | ||
e74aeda8 | 5109 | string = w->contents; |
6b61353c KH |
5110 | if (STRINGP (it.string)) |
5111 | string = it.string; | |
a1b0a6db | 5112 | *pos = it.current; |
86282aab KH |
5113 | if (it.what == IT_COMPOSITION |
5114 | && it.cmp_it.nchars > 1 | |
5115 | && it.cmp_it.reversed_p) | |
5116 | { | |
5117 | /* The current display element is a grapheme cluster in a | |
5118 | composition. In that case, we need the position of the first | |
5119 | character of the cluster. But, as it.cmp_it.reversed_p is 1, | |
5120 | it.current points to the last character of the cluster, thus | |
5121 | we must move back to the first character of the same | |
5122 | cluster. */ | |
5123 | CHARPOS (pos->pos) -= it.cmp_it.nchars - 1; | |
5124 | if (STRINGP (it.string)) | |
5125 | BYTEPOS (pos->pos) = string_char_to_byte (string, CHARPOS (pos->pos)); | |
5126 | else | |
e74aeda8 | 5127 | BYTEPOS (pos->pos) = buf_charpos_to_bytepos (XBUFFER (w->contents), |
425cc014 | 5128 | CHARPOS (pos->pos)); |
86282aab | 5129 | } |
6b61353c KH |
5130 | |
5131 | #ifdef HAVE_WINDOW_SYSTEM | |
5132 | if (it.what == IT_IMAGE) | |
5133 | { | |
6b61353c KH |
5134 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5135 | && !NILP (img->spec)) | |
5136 | *object = img->spec; | |
5137 | } | |
5138 | #endif | |
5139 | ||
b70d98e1 KS |
5140 | if (it.vpos < w->current_matrix->nrows |
5141 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5142 | row->enabled_p)) | |
6b61353c KH |
5143 | { |
5144 | if (it.hpos < row->used[TEXT_AREA]) | |
5145 | { | |
5146 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6b61353c | 5147 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5148 | if (img) |
5149 | { | |
5150 | *dy -= row->ascent - glyph->ascent; | |
4be9765d KH |
5151 | *dx += glyph->slice.img.x; |
5152 | *dy += glyph->slice.img.y; | |
cedd7cd9 KS |
5153 | /* Image slices positions are still relative to the entire image */ |
5154 | *width = img->width; | |
5155 | *height = img->height; | |
5156 | } | |
5157 | else | |
6b61353c | 5158 | #endif |
cedd7cd9 KS |
5159 | { |
5160 | *width = glyph->pixel_width; | |
5161 | *height = glyph->ascent + glyph->descent; | |
5162 | } | |
6b61353c KH |
5163 | } |
5164 | else | |
5165 | { | |
5166 | *width = 0; | |
5167 | *height = row->height; | |
5168 | } | |
5169 | } | |
5170 | else | |
5171 | { | |
5172 | *width = *height = 0; | |
5173 | } | |
5174 | ||
5175 | /* Add extra (default width) columns if clicked after EOL. */ | |
5e617bc2 | 5176 | x1 = max (0, it.current_x + it.pixel_width - it.first_visible_x); |
6b61353c KH |
5177 | if (x0 > x1) |
5178 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5179 | ||
5180 | *x = it.hpos; | |
5181 | *y = it.vpos; | |
5182 | ||
5183 | return string; | |
5f5c8ee5 | 5184 | } |
4588ec20 | 5185 | |
5f5c8ee5 GM |
5186 | |
5187 | /* Value is the string under window-relative coordinates X/Y in the | |
6b61353c KH |
5188 | mode line or header line (PART says which) of window W, or nil if none. |
5189 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
5190 | |
5191 | Lisp_Object | |
ace1712c | 5192 | mode_line_string (struct window *w, enum window_part part, |
d311d28c | 5193 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5194 | int *dx, int *dy, int *width, int *height) |
5f5c8ee5 GM |
5195 | { |
5196 | struct glyph_row *row; | |
5197 | struct glyph *glyph, *end; | |
6b61353c | 5198 | int x0, y0; |
5f5c8ee5 GM |
5199 | Lisp_Object string = Qnil; |
5200 | ||
641bdbf3 | 5201 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
5202 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
5203 | else | |
045dee35 | 5204 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
6b61353c KH |
5205 | y0 = *y - row->y; |
5206 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
5f5c8ee5 GM |
5207 | |
5208 | if (row->mode_line_p && row->enabled_p) | |
4588ec20 | 5209 | { |
5f5c8ee5 GM |
5210 | /* Find the glyph under X. If we find one with a string object, |
5211 | it's the one we were looking for. */ | |
5212 | glyph = row->glyphs[TEXT_AREA]; | |
5213 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 5214 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5215 | x0 -= glyph->pixel_width; |
5216 | *x = glyph - row->glyphs[TEXT_AREA]; | |
5217 | if (glyph < end) | |
5218 | { | |
5219 | string = glyph->object; | |
5220 | *charpos = glyph->charpos; | |
5221 | *width = glyph->pixel_width; | |
5222 | *height = glyph->ascent + glyph->descent; | |
5223 | #ifdef HAVE_WINDOW_SYSTEM | |
5224 | if (glyph->type == IMAGE_GLYPH) | |
5225 | { | |
5226 | struct image *img; | |
5227 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5228 | if (img != NULL) | |
5229 | *object = img->spec; | |
5230 | y0 -= row->ascent - glyph->ascent; | |
5231 | } | |
5232 | #endif | |
5233 | } | |
5234 | else | |
5235 | { | |
5236 | /* Add extra (default width) columns if clicked after EOL. */ | |
5237 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5238 | *width = 0; | |
5239 | *height = row->height; | |
5240 | } | |
5241 | } | |
5242 | else | |
5243 | { | |
5244 | *x = 0; | |
5245 | x0 = 0; | |
5246 | *width = *height = 0; | |
4588ec20 | 5247 | } |
5f5c8ee5 | 5248 | |
6b61353c KH |
5249 | *dx = x0; |
5250 | *dy = y0; | |
5251 | ||
5f5c8ee5 | 5252 | return string; |
4588ec20 | 5253 | } |
5f5c8ee5 GM |
5254 | |
5255 | ||
db1db309 GM |
5256 | /* Value is the string under window-relative coordinates X/Y in either |
5257 | marginal area, or nil if none. *CHARPOS is set to the position in | |
5258 | the string returned. */ | |
5259 | ||
5260 | Lisp_Object | |
ace1712c | 5261 | marginal_area_string (struct window *w, enum window_part part, |
d311d28c | 5262 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5263 | int *dx, int *dy, int *width, int *height) |
db1db309 GM |
5264 | { |
5265 | struct glyph_row *row = w->current_matrix->rows; | |
5266 | struct glyph *glyph, *end; | |
6b61353c | 5267 | int x0, y0, i, wy = *y; |
641bdbf3 | 5268 | int area; |
db1db309 GM |
5269 | Lisp_Object string = Qnil; |
5270 | ||
641bdbf3 | 5271 | if (part == ON_LEFT_MARGIN) |
db1db309 | 5272 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 5273 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
5274 | area = RIGHT_MARGIN_AREA; |
5275 | else | |
1088b922 | 5276 | emacs_abort (); |
db1db309 GM |
5277 | |
5278 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
5279 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
5280 | break; | |
6b61353c KH |
5281 | y0 = *y - row->y; |
5282 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
db1db309 GM |
5283 | |
5284 | if (row->enabled_p) | |
5285 | { | |
5286 | /* Find the glyph under X. If we find one with a string object, | |
5287 | it's the one we were looking for. */ | |
db1db309 | 5288 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 5289 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5290 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
880e6158 | 5291 | : WINDOW_FRINGES_WIDTH (w)) |
7df02016 KS |
5292 | + window_box_width (w, LEFT_MARGIN_AREA) |
5293 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 5294 | else |
7df02016 | 5295 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5296 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5297 | : 0); |
5298 | ||
6b61353c KH |
5299 | glyph = row->glyphs[area]; |
5300 | end = glyph + row->used[area]; | |
cfde341f | 5301 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5302 | x0 -= glyph->pixel_width; |
5303 | *x = glyph - row->glyphs[area]; | |
5304 | if (glyph < end) | |
5305 | { | |
5306 | string = glyph->object; | |
5307 | *charpos = glyph->charpos; | |
5308 | *width = glyph->pixel_width; | |
5309 | *height = glyph->ascent + glyph->descent; | |
5310 | #ifdef HAVE_WINDOW_SYSTEM | |
5311 | if (glyph->type == IMAGE_GLYPH) | |
5312 | { | |
5313 | struct image *img; | |
5314 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5315 | if (img != NULL) | |
5316 | *object = img->spec; | |
5317 | y0 -= row->ascent - glyph->ascent; | |
4be9765d KH |
5318 | x0 += glyph->slice.img.x; |
5319 | y0 += glyph->slice.img.y; | |
6b61353c KH |
5320 | } |
5321 | #endif | |
5322 | } | |
5323 | else | |
5324 | { | |
5325 | /* Add extra (default width) columns if clicked after EOL. */ | |
5326 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5327 | *width = 0; | |
5328 | *height = row->height; | |
5329 | } | |
db1db309 | 5330 | } |
6b61353c KH |
5331 | else |
5332 | { | |
5333 | x0 = 0; | |
5334 | *x = 0; | |
5335 | *width = *height = 0; | |
5336 | } | |
5337 | ||
5338 | *dx = x0; | |
5339 | *dy = y0; | |
db1db309 GM |
5340 | |
5341 | return string; | |
5342 | } | |
5343 | ||
5344 | ||
5f5c8ee5 GM |
5345 | /*********************************************************************** |
5346 | Changing Frame Sizes | |
5347 | ***********************************************************************/ | |
4588ec20 JB |
5348 | |
5349 | #ifdef SIGWINCH | |
5f5c8ee5 | 5350 | |
20ef56db PE |
5351 | static void deliver_window_change_signal (int); |
5352 | ||
9af30bdf | 5353 | static void |
20ef56db | 5354 | handle_window_change_signal (int sig) |
4588ec20 JB |
5355 | { |
5356 | int width, height; | |
28d7d09f | 5357 | struct tty_display_info *tty; |
4d553a13 | 5358 | |
9628b887 KL |
5359 | /* The frame size change obviously applies to a single |
5360 | termcap-controlled terminal, but we can't decide which. | |
5361 | Therefore, we resize the frames corresponding to each tty. | |
9628b887 KL |
5362 | */ |
5363 | for (tty = tty_list; tty; tty = tty->next) { | |
4588ec20 | 5364 | |
0a125897 KL |
5365 | if (! tty->term_initted) |
5366 | continue; | |
4588ec20 | 5367 | |
db878925 DN |
5368 | /* Suspended tty frames have tty->input == NULL avoid trying to |
5369 | use it. */ | |
5370 | if (!tty->input) | |
5371 | continue; | |
5372 | ||
0b0d3e0b | 5373 | get_tty_size (fileno (tty->input), &width, &height); |
3fc809e2 | 5374 | |
bedeffcf | 5375 | if (width > 5 && height > 2) { |
9628b887 | 5376 | Lisp_Object tail, frame; |
3fc809e2 | 5377 | |
9628b887 | 5378 | FOR_EACH_FRAME (tail, frame) |
4d553a13 KL |
5379 | if (FRAME_TERMCAP_P (XFRAME (frame)) && FRAME_TTY (XFRAME (frame)) == tty) |
5380 | /* Record the new sizes, but don't reallocate the data | |
5381 | structures now. Let that be done later outside of the | |
5382 | signal handler. */ | |
880e6158 | 5383 | change_frame_size (XFRAME (frame), width, height, 0, 1, 0, 0); |
9628b887 | 5384 | } |
4588ec20 | 5385 | } |
20ef56db | 5386 | } |
3fc809e2 | 5387 | |
20ef56db PE |
5388 | static void |
5389 | deliver_window_change_signal (int sig) | |
5390 | { | |
4d7e6e51 | 5391 | deliver_process_signal (sig, handle_window_change_signal); |
4588ec20 JB |
5392 | } |
5393 | #endif /* SIGWINCH */ | |
5394 | ||
5395 | ||
59ea14cd PE |
5396 | /* Do any change in frame size that was requested by a signal. |
5397 | SAFE means this function is called from a place where it is | |
5398 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 5399 | |
dfcf069d | 5400 | void |
59ea14cd | 5401 | do_pending_window_change (bool safe) |
4588ec20 | 5402 | { |
20ef56db | 5403 | /* If window change signal handler should have run before, run it now. */ |
b96fd3e8 GM |
5404 | if (redisplaying_p && !safe) |
5405 | return; | |
177c0ea7 | 5406 | |
4588ec20 JB |
5407 | while (delayed_size_change) |
5408 | { | |
35f56f96 | 5409 | Lisp_Object tail, frame; |
4588ec20 JB |
5410 | |
5411 | delayed_size_change = 0; | |
5412 | ||
35f56f96 | 5413 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5414 | { |
5f5c8ee5 | 5415 | struct frame *f = XFRAME (frame); |
35f56f96 | 5416 | |
880e6158 MR |
5417 | if (f->new_height != 0 || f->new_width != 0) |
5418 | change_frame_size (f, f->new_width, f->new_height, | |
5419 | 0, 0, safe, f->new_pixelwise); | |
4588ec20 JB |
5420 | } |
5421 | } | |
5422 | } | |
5423 | ||
502b9b64 | 5424 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 5425 | indicate no change is to take place. |
4588ec20 | 5426 | |
880e6158 MR |
5427 | new_height and new_width refer to the text portion of the frame. It |
5428 | doesn't matter for new_height, since text and total portion are the | |
5429 | same in that case. But new_width must be enlarged to get the total | |
5430 | width of the frame. | |
5431 | ||
59ea14cd PE |
5432 | If DELAY, assume we're being called from a signal handler, and |
5433 | queue the change for later - perhaps the next redisplay. | |
5434 | Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
5435 | from a signal handler. |
5436 | ||
59ea14cd | 5437 | SAFE means this function is called from a place where it's |
b96fd3e8 | 5438 | safe to change frame sizes while a redisplay is in progress. */ |
b6a65ac2 | 5439 | |
dfcf069d | 5440 | void |
880e6158 MR |
5441 | change_frame_size (struct frame *f, int new_width, int new_height, |
5442 | bool pretend, bool delay, bool safe, bool pixelwise) | |
45140e01 RS |
5443 | { |
5444 | Lisp_Object tail, frame; | |
3826ea1a | 5445 | |
9628b887 | 5446 | if (FRAME_MSDOS_P (f)) |
45140e01 | 5447 | { |
9628b887 KL |
5448 | /* On MS-DOS, all frames use the same screen, so a change in |
5449 | size affects all frames. Termcap now supports multiple | |
5450 | ttys. */ | |
45140e01 | 5451 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 5452 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
880e6158 MR |
5453 | change_frame_size_1 (XFRAME (frame), new_width, new_height, |
5454 | pretend, delay, safe, pixelwise); | |
45140e01 RS |
5455 | } |
5456 | else | |
880e6158 MR |
5457 | change_frame_size_1 (f, new_width, new_height, pretend, delay, safe, |
5458 | pixelwise); | |
45140e01 RS |
5459 | } |
5460 | ||
5461 | static void | |
880e6158 MR |
5462 | change_frame_size_1 (struct frame *f, int new_width, int new_height, |
5463 | bool pretend, bool delay, bool safe, bool pixelwise) | |
4588ec20 | 5464 | { |
880e6158 | 5465 | int new_text_width, new_text_height, new_root_width; |
564eb533 | 5466 | int old_root_width = WINDOW_PIXEL_WIDTH (XWINDOW (FRAME_ROOT_WINDOW (f))); |
880e6158 | 5467 | int new_cols, new_lines; |
d311d28c | 5468 | ptrdiff_t count = SPECPDL_INDEX (); |
3826ea1a | 5469 | |
4588ec20 | 5470 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 5471 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 5472 | { |
880e6158 MR |
5473 | f->new_width = new_width; |
5474 | f->new_height = new_height; | |
5475 | f->new_pixelwise = pixelwise; | |
4588ec20 JB |
5476 | delayed_size_change = 1; |
5477 | return; | |
5478 | } | |
5479 | ||
502b9b64 | 5480 | /* This size-change overrides any pending one for this frame. */ |
880e6158 MR |
5481 | f->new_height = 0; |
5482 | f->new_width = 0; | |
5483 | f->new_pixelwise = 0; | |
b6a65ac2 | 5484 | |
08f7aa3e | 5485 | /* If an argument is zero, set it to the current value. */ |
880e6158 MR |
5486 | if (pixelwise) |
5487 | { | |
5488 | new_text_width = (new_width == 0) ? FRAME_TEXT_WIDTH (f) : new_width; | |
5489 | new_text_height = (new_height == 0) ? FRAME_TEXT_HEIGHT (f) : new_height; | |
c44de18d MR |
5490 | /* Consider rounding here: Currently, the root window can be |
5491 | larger than the frame in terms of columns/lines. */ | |
880e6158 MR |
5492 | new_cols = new_text_width / FRAME_COLUMN_WIDTH (f); |
5493 | new_lines = new_text_height / FRAME_LINE_HEIGHT (f); | |
5494 | } | |
5495 | else | |
5496 | { | |
5497 | new_cols = (new_width == 0) ? FRAME_COLS (f) : new_width; | |
5498 | new_lines = (new_height == 0) ? FRAME_LINES (f) : new_height; | |
5499 | new_text_width = new_cols * FRAME_COLUMN_WIDTH (f); | |
5500 | new_text_height = new_lines * FRAME_LINE_HEIGHT (f); | |
5501 | } | |
3826ea1a | 5502 | |
3b95a6f9 | 5503 | /* Compute width of windows in F. */ |
b6a65ac2 | 5504 | /* Round up to the smallest acceptable size. */ |
880e6158 MR |
5505 | check_frame_size (f, &new_text_width, &new_text_height, 1); |
5506 | ||
5507 | /* This is the width of the frame without vertical scroll bars and | |
5508 | fringe columns. Do this after rounding - see discussion of | |
5509 | bug#9723. */ | |
5510 | new_root_width = (new_text_width | |
880e6158 MR |
5511 | + FRAME_SCROLL_BAR_AREA_WIDTH (f) |
5512 | + FRAME_TOTAL_FRINGE_WIDTH (f)); | |
b6a65ac2 | 5513 | /* If we're not changing the frame size, quit now. */ |
3b95a6f9 MR |
5514 | /* Frame width may be unchanged but the text portion may change, for |
5515 | example, fullscreen and remove/add scroll bar. */ | |
880e6158 MR |
5516 | if (new_text_height == FRAME_TEXT_HEIGHT (f) |
5517 | && new_text_width == FRAME_TEXT_WIDTH (f) | |
5518 | && new_root_width == old_root_width) | |
4588ec20 JB |
5519 | return; |
5520 | ||
4d7e6e51 | 5521 | block_input (); |
cbb95688 | 5522 | |
886a8a6c KH |
5523 | #ifdef MSDOS |
5524 | /* We only can set screen dimensions to certain values supported | |
5525 | by our video hardware. Try to find the smallest size greater | |
5526 | or equal to the requested dimensions. */ | |
880e6158 | 5527 | dos_set_window_size (&new_lines, &new_cols); |
886a8a6c KH |
5528 | #endif |
5529 | ||
880e6158 | 5530 | if (new_text_height != FRAME_TEXT_HEIGHT (f)) |
4588ec20 | 5531 | { |
880e6158 | 5532 | resize_frame_windows (f, new_text_height, 0, 1); |
b6a65ac2 | 5533 | |
48e482e6 EZ |
5534 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5535 | manipulating video hardware. */ | |
5536 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
880e6158 | 5537 | FrameRows (FRAME_TTY (f)) = new_height; |
4588ec20 JB |
5538 | } |
5539 | ||
880e6158 MR |
5540 | if (new_text_width != FRAME_TEXT_WIDTH (f) |
5541 | || new_root_width != old_root_width) | |
4588ec20 | 5542 | { |
880e6158 | 5543 | resize_frame_windows (f, new_root_width, 1, 1); |
4588ec20 | 5544 | |
48e482e6 EZ |
5545 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5546 | manipulating video hardware. */ | |
5547 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
880e6158 | 5548 | FrameCols (FRAME_TTY (f)) = new_cols; |
5f5c8ee5 | 5549 | |
742516e0 | 5550 | #if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS) |
e69b0960 | 5551 | if (WINDOWP (f->tool_bar_window)) |
880e6158 MR |
5552 | { |
5553 | XWINDOW (f->tool_bar_window)->total_cols = new_cols; | |
5554 | XWINDOW (f->tool_bar_window)->pixel_width = new_root_width; | |
5555 | } | |
742516e0 | 5556 | #endif |
4588ec20 JB |
5557 | } |
5558 | ||
880e6158 MR |
5559 | SET_FRAME_COLS (f, new_cols); |
5560 | FRAME_LINES (f) = new_lines; | |
5561 | FRAME_TEXT_WIDTH (f) = new_text_width; | |
5562 | FRAME_TEXT_HEIGHT (f) = new_text_height; | |
5563 | FRAME_PIXEL_WIDTH (f) = FRAME_TEXT_TO_PIXEL_WIDTH (f, new_text_width); | |
5564 | FRAME_PIXEL_HEIGHT (f) = FRAME_TEXT_TO_PIXEL_HEIGHT (f, new_text_height); | |
986e61b8 | 5565 | |
5f5c8ee5 GM |
5566 | { |
5567 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
5568 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 5569 | |
5f5c8ee5 GM |
5570 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
5571 | &text_area_height); | |
5572 | if (w->cursor.x >= text_area_x + text_area_width) | |
5573 | w->cursor.hpos = w->cursor.x = 0; | |
5574 | if (w->cursor.y >= text_area_y + text_area_height) | |
5575 | w->cursor.vpos = w->cursor.y = 0; | |
5576 | } | |
986e61b8 | 5577 | |
bd0443bb | 5578 | adjust_frame_glyphs (f); |
5f5c8ee5 | 5579 | calculate_costs (f); |
cb02fa39 GM |
5580 | SET_FRAME_GARBAGED (f); |
5581 | f->resized_p = 1; | |
97cf50e7 | 5582 | |
4d7e6e51 | 5583 | unblock_input (); |
61730a69 | 5584 | |
66322887 | 5585 | record_unwind_current_buffer (); |
e523f7e5 | 5586 | |
ef264c42 | 5587 | run_window_configuration_change_hook (f); |
e523f7e5 RS |
5588 | |
5589 | unbind_to (count, Qnil); | |
4588ec20 JB |
5590 | } |
5591 | \f | |
5f5c8ee5 GM |
5592 | /*********************************************************************** |
5593 | Terminal Related Lisp Functions | |
5594 | ***********************************************************************/ | |
5595 | ||
5596 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 5597 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
5598 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
5599 | FILE = nil means just close any termscript file currently open. */) | |
5842a27b | 5600 | (Lisp_Object file) |
5f5c8ee5 | 5601 | { |
0b0d3e0b KL |
5602 | struct tty_display_info *tty; |
5603 | ||
7d2f1216 EZ |
5604 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ()) |
5605 | && ! FRAME_MSDOS_P (SELECTED_FRAME ())) | |
0b0d3e0b KL |
5606 | error ("Current frame is not on a tty device"); |
5607 | ||
5608 | tty = CURTTY (); | |
5609 | ||
5610 | if (tty->termscript != 0) | |
406af475 PE |
5611 | { |
5612 | block_input (); | |
5613 | fclose (tty->termscript); | |
5614 | tty->termscript = 0; | |
5615 | unblock_input (); | |
5616 | } | |
5f5c8ee5 GM |
5617 | |
5618 | if (! NILP (file)) | |
5619 | { | |
5620 | file = Fexpand_file_name (file, Qnil); | |
406af475 | 5621 | tty->termscript = emacs_fopen (SSDATA (file), "w"); |
0b0d3e0b | 5622 | if (tty->termscript == 0) |
a9757f6a | 5623 | report_file_error ("Opening termscript", file); |
5f5c8ee5 GM |
5624 | } |
5625 | return Qnil; | |
5626 | } | |
5627 | ||
5628 | ||
4588ec20 | 5629 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
62af879c | 5630 | Ssend_string_to_terminal, 1, 2, 0, |
7ee72033 | 5631 | doc: /* Send STRING to the terminal without alteration. |
62af879c KL |
5632 | Control characters in STRING will have terminal-dependent effects. |
5633 | ||
6ed8eeff | 5634 | Optional parameter TERMINAL specifies the tty terminal device to use. |
558759e4 AM |
5635 | It may be a terminal object, a frame, or nil for the terminal used by |
5636 | the currently selected frame. In batch mode, STRING is sent to stdout | |
5637 | when TERMINAL is nil. */) | |
5842a27b | 5638 | (Lisp_Object string, Lisp_Object terminal) |
4588ec20 | 5639 | { |
7cef7ce3 SM |
5640 | struct terminal *t = get_terminal (terminal, 1); |
5641 | FILE *out; | |
0b0d3e0b | 5642 | |
94f3db62 | 5643 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 5644 | CHECK_STRING (string); |
4d7e6e51 | 5645 | block_input (); |
0b0d3e0b | 5646 | |
6ed8eeff KL |
5647 | if (!t) |
5648 | error ("Unknown terminal device"); | |
0b0d3e0b | 5649 | |
7cef7ce3 SM |
5650 | if (t->type == output_initial) |
5651 | out = stdout; | |
5652 | else if (t->type != output_termcap && t->type != output_msdos_raw) | |
5653 | error ("Device %d is not a termcap terminal device", t->id); | |
5654 | else | |
5655 | { | |
5656 | struct tty_display_info *tty = t->display_info.tty; | |
3fc809e2 | 5657 | |
7cef7ce3 SM |
5658 | if (! tty->output) |
5659 | error ("Terminal is currently suspended"); | |
cecfdea6 | 5660 | |
7cef7ce3 SM |
5661 | if (tty->termscript) |
5662 | { | |
5663 | fwrite (SDATA (string), 1, SBYTES (string), tty->termscript); | |
5664 | fflush (tty->termscript); | |
5665 | } | |
5666 | out = tty->output; | |
4588ec20 | 5667 | } |
7cef7ce3 SM |
5668 | fwrite (SDATA (string), 1, SBYTES (string), out); |
5669 | fflush (out); | |
4d7e6e51 | 5670 | unblock_input (); |
4588ec20 JB |
5671 | return Qnil; |
5672 | } | |
5673 | ||
5f5c8ee5 | 5674 | |
a7ca3326 | 5675 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 5676 | doc: /* Beep, or flash the screen. |
228299fa | 5677 | Also, unless an argument is given, |
7ee72033 | 5678 | terminate any keyboard macro currently executing. */) |
5842a27b | 5679 | (Lisp_Object arg) |
4588ec20 | 5680 | { |
efb859b4 | 5681 | if (!NILP (arg)) |
4588ec20 | 5682 | { |
7fa788da RS |
5683 | if (noninteractive) |
5684 | putchar (07); | |
5685 | else | |
385ed61f | 5686 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5687 | } |
5688 | else | |
5689 | bitch_at_user (); | |
5690 | ||
5691 | return Qnil; | |
5692 | } | |
5693 | ||
dfcf069d | 5694 | void |
971de7fb | 5695 | bitch_at_user (void) |
4588ec20 JB |
5696 | { |
5697 | if (noninteractive) | |
5698 | putchar (07); | |
5f5c8ee5 | 5699 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
81519fd2 SM |
5700 | { |
5701 | const char *msg | |
5702 | = "Keyboard macro terminated by a command ringing the bell"; | |
6c6f1994 | 5703 | Fsignal (Quser_error, list1 (build_string (msg))); |
81519fd2 | 5704 | } |
4588ec20 | 5705 | else |
385ed61f | 5706 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5707 | } |
5708 | ||
5f5c8ee5 GM |
5709 | |
5710 | \f | |
5711 | /*********************************************************************** | |
5712 | Sleeping, Waiting | |
5713 | ***********************************************************************/ | |
5714 | ||
a7ca3326 | 5715 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 5716 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
5717 | SECONDS may be a floating-point value, meaning that you can wait for a |
5718 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
d35af63c | 5719 | additional wait period, in milliseconds; this is for backwards compatibility. |
7ee72033 | 5720 | \(Not all operating systems support waiting for a fraction of a second.) */) |
5842a27b | 5721 | (Lisp_Object seconds, Lisp_Object milliseconds) |
4588ec20 | 5722 | { |
d311d28c | 5723 | double duration = extract_float (seconds); |
4588ec20 | 5724 | |
d311d28c PE |
5725 | if (!NILP (milliseconds)) |
5726 | { | |
5727 | CHECK_NUMBER (milliseconds); | |
5728 | duration += XINT (milliseconds) / 1000.0; | |
5729 | } | |
b07646f5 | 5730 | |
908589fd | 5731 | if (duration > 0) |
d35af63c | 5732 | { |
43aac990 PE |
5733 | struct timespec t = dtotimespec (duration); |
5734 | wait_reading_process_output (min (t.tv_sec, WAIT_READING_MAX), | |
5735 | t.tv_nsec, 0, 0, Qnil, NULL, 0); | |
d35af63c | 5736 | } |
4588ec20 JB |
5737 | |
5738 | return Qnil; | |
5739 | } | |
5740 | ||
5f5c8ee5 | 5741 | |
dcd1ca45 | 5742 | /* This is just like wait_reading_process_output, except that |
902b9b6d | 5743 | it does redisplay. |
f76475ad | 5744 | |
2bcac766 CY |
5745 | TIMEOUT is number of seconds to wait (float or integer), |
5746 | or t to wait forever. | |
59ea14cd | 5747 | READING is true if reading input. |
9fa1de30 PE |
5748 | If DISPLAY_OPTION is >0 display process output while waiting. |
5749 | If DISPLAY_OPTION is >1 perform an initial redisplay before waiting. | |
902b9b6d | 5750 | */ |
4588ec20 | 5751 | |
f76475ad | 5752 | Lisp_Object |
9fa1de30 | 5753 | sit_for (Lisp_Object timeout, bool reading, int display_option) |
f76475ad | 5754 | { |
d35af63c PE |
5755 | intmax_t sec; |
5756 | int nsec; | |
9fa1de30 | 5757 | bool do_display = display_option > 0; |
f222369e | 5758 | |
902b9b6d | 5759 | swallow_events (do_display); |
ccddf474 | 5760 | |
902b9b6d | 5761 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 5762 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 5763 | return Qnil; |
4588ec20 | 5764 | |
9fa1de30 | 5765 | if (display_option > 1) |
902b9b6d KS |
5766 | redisplay_preserve_echo_area (2); |
5767 | ||
d35af63c | 5768 | if (INTEGERP (timeout)) |
2bcac766 | 5769 | { |
d35af63c | 5770 | sec = XINT (timeout); |
908589fd | 5771 | if (sec <= 0) |
d35af63c PE |
5772 | return Qt; |
5773 | nsec = 0; | |
2bcac766 | 5774 | } |
d35af63c | 5775 | else if (FLOATP (timeout)) |
d311d28c | 5776 | { |
d35af63c | 5777 | double seconds = XFLOAT_DATA (timeout); |
7216e43b | 5778 | if (! (0 < seconds)) |
d311d28c | 5779 | return Qt; |
d35af63c PE |
5780 | else |
5781 | { | |
43aac990 PE |
5782 | struct timespec t = dtotimespec (seconds); |
5783 | sec = min (t.tv_sec, WAIT_READING_MAX); | |
5784 | nsec = t.tv_nsec; | |
d35af63c PE |
5785 | } |
5786 | } | |
5787 | else if (EQ (timeout, Qt)) | |
5788 | { | |
5789 | sec = 0; | |
5790 | nsec = 0; | |
d311d28c | 5791 | } |
d35af63c PE |
5792 | else |
5793 | wrong_type_argument (Qnumberp, timeout); | |
5794 | ||
dfdb645c | 5795 | |
4a4bbad2 | 5796 | #ifdef USABLE_SIGIO |
f75beb47 | 5797 | gobble_input (); |
f76475ad JB |
5798 | #endif |
5799 | ||
d35af63c | 5800 | wait_reading_process_output (sec, nsec, reading ? -1 : 1, do_display, |
dcd1ca45 | 5801 | Qnil, NULL, 0); |
f76475ad | 5802 | |
4588ec20 JB |
5803 | return detect_input_pending () ? Qnil : Qt; |
5804 | } | |
5805 | ||
5f5c8ee5 | 5806 | |
a7ca3326 | 5807 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
025de85b CY |
5808 | doc: /* Perform redisplay. |
5809 | Optional arg FORCE, if non-nil, prevents redisplay from being | |
5810 | preempted by arriving input, even if `redisplay-dont-pause' is nil. | |
5811 | If `redisplay-dont-pause' is non-nil (the default), redisplay is never | |
5812 | preempted by arriving input, so FORCE does nothing. | |
5813 | ||
5814 | Return t if redisplay was performed, nil if redisplay was preempted | |
5815 | immediately by pending input. */) | |
5842a27b | 5816 | (Lisp_Object force) |
f76475ad | 5817 | { |
d311d28c | 5818 | ptrdiff_t count; |
659d9874 | 5819 | |
902b9b6d KS |
5820 | swallow_events (1); |
5821 | if ((detect_input_pending_run_timers (1) | |
01327edf | 5822 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
5823 | || !NILP (Vexecuting_kbd_macro)) |
5824 | return Qnil; | |
f76475ad | 5825 | |
01327edf KS |
5826 | count = SPECPDL_INDEX (); |
5827 | if (!NILP (force) && !redisplay_dont_pause) | |
5828 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 5829 | redisplay_preserve_echo_area (2); |
01327edf | 5830 | unbind_to (count, Qnil); |
7ba07a1a | 5831 | return Qt; |
f76475ad | 5832 | } |
5f5c8ee5 GM |
5833 | |
5834 | ||
5835 | \f | |
5836 | /*********************************************************************** | |
5837 | Other Lisp Functions | |
5838 | ***********************************************************************/ | |
5839 | ||
5840 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
5841 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 5842 | buffer-modified-flags. */ |
5f5c8ee5 GM |
5843 | |
5844 | static Lisp_Object frame_and_buffer_state; | |
5845 | ||
5846 | ||
5847 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 5848 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 5849 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
5850 | VARIABLE is a variable name whose value is either nil or a state vector |
5851 | that will be updated to contain all frames and buffers, | |
228299fa | 5852 | aside from buffers whose names start with space, |
44edd521 RS |
5853 | along with the buffers' read-only and modified flags. This allows a fast |
5854 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 5855 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
5856 | the current state. |
5857 | ||
5858 | If VARIABLE is nil, an internal variable is used. Users should not | |
5859 | pass nil for VARIABLE. */) | |
5842a27b | 5860 | (Lisp_Object variable) |
5f5c8ee5 | 5861 | { |
44edd521 | 5862 | Lisp_Object state, tail, frame, buf; |
086ca913 | 5863 | ptrdiff_t n, idx; |
5f5c8ee5 | 5864 | |
44edd521 RS |
5865 | if (! NILP (variable)) |
5866 | { | |
5867 | CHECK_SYMBOL (variable); | |
5868 | state = Fsymbol_value (variable); | |
5869 | if (! VECTORP (state)) | |
5870 | goto changed; | |
5871 | } | |
5872 | else | |
5873 | state = frame_and_buffer_state; | |
5874 | ||
086ca913 | 5875 | idx = 0; |
5f5c8ee5 GM |
5876 | FOR_EACH_FRAME (tail, frame) |
5877 | { | |
086ca913 | 5878 | if (idx == ASIZE (state)) |
44edd521 | 5879 | goto changed; |
086ca913 | 5880 | if (!EQ (AREF (state, idx++), frame)) |
5f5c8ee5 | 5881 | goto changed; |
086ca913 | 5882 | if (idx == ASIZE (state)) |
44edd521 | 5883 | goto changed; |
086ca913 | 5884 | if (!EQ (AREF (state, idx++), XFRAME (frame)->name)) |
5f5c8ee5 GM |
5885 | goto changed; |
5886 | } | |
44edd521 | 5887 | /* Check that the buffer info matches. */ |
8f3a2c26 | 5888 | FOR_EACH_LIVE_BUFFER (tail, buf) |
5f5c8ee5 | 5889 | { |
5f5c8ee5 | 5890 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 5891 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 5892 | continue; |
086ca913 | 5893 | if (idx == ASIZE (state)) |
44edd521 | 5894 | goto changed; |
086ca913 | 5895 | if (!EQ (AREF (state, idx++), buf)) |
5f5c8ee5 | 5896 | goto changed; |
086ca913 | 5897 | if (idx == ASIZE (state)) |
44edd521 | 5898 | goto changed; |
086ca913 | 5899 | if (!EQ (AREF (state, idx++), BVAR (XBUFFER (buf), read_only))) |
5f5c8ee5 | 5900 | goto changed; |
086ca913 | 5901 | if (idx == ASIZE (state)) |
44edd521 | 5902 | goto changed; |
086ca913 | 5903 | if (!EQ (AREF (state, idx++), Fbuffer_modified_p (buf))) |
5f5c8ee5 GM |
5904 | goto changed; |
5905 | } | |
086ca913 | 5906 | if (idx == ASIZE (state)) |
44edd521 | 5907 | goto changed; |
5f5c8ee5 | 5908 | /* Detect deletion of a buffer at the end of the list. */ |
086ca913 | 5909 | if (EQ (AREF (state, idx), Qlambda)) |
5f5c8ee5 | 5910 | return Qnil; |
44edd521 RS |
5911 | |
5912 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 5913 | changed: |
44edd521 RS |
5914 | /* Count the size we will need. |
5915 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
5916 | n = 1; |
5917 | FOR_EACH_FRAME (tail, frame) | |
5918 | n += 2; | |
8f3a2c26 | 5919 | FOR_EACH_LIVE_BUFFER (tail, buf) |
5f5c8ee5 | 5920 | n += 3; |
44edd521 RS |
5921 | /* Reallocate the vector if data has grown to need it, |
5922 | or if it has shrunk a lot. */ | |
5923 | if (! VECTORP (state) | |
77b37c05 PE |
5924 | || n > ASIZE (state) |
5925 | || n + 20 < ASIZE (state) / 2) | |
5f5c8ee5 | 5926 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
5927 | { |
5928 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
5929 | if (! NILP (variable)) | |
5930 | Fset (variable, state); | |
5931 | else | |
5932 | frame_and_buffer_state = state; | |
5933 | } | |
5934 | ||
5935 | /* Record the new data in the (possibly reallocated) vector. */ | |
086ca913 | 5936 | idx = 0; |
5f5c8ee5 GM |
5937 | FOR_EACH_FRAME (tail, frame) |
5938 | { | |
086ca913 DA |
5939 | ASET (state, idx, frame); |
5940 | idx++; | |
5941 | ASET (state, idx, XFRAME (frame)->name); | |
5942 | idx++; | |
5f5c8ee5 | 5943 | } |
8f3a2c26 | 5944 | FOR_EACH_LIVE_BUFFER (tail, buf) |
5f5c8ee5 | 5945 | { |
5f5c8ee5 | 5946 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 5947 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 5948 | continue; |
086ca913 DA |
5949 | ASET (state, idx, buf); |
5950 | idx++; | |
5951 | ASET (state, idx, BVAR (XBUFFER (buf), read_only)); | |
5952 | idx++; | |
5953 | ASET (state, idx, Fbuffer_modified_p (buf)); | |
5954 | idx++; | |
5f5c8ee5 GM |
5955 | } |
5956 | /* Fill up the vector with lambdas (always at least one). */ | |
086ca913 DA |
5957 | ASET (state, idx, Qlambda); |
5958 | idx++; | |
5959 | while (idx < ASIZE (state)) | |
5960 | { | |
5961 | ASET (state, idx, Qlambda); | |
5962 | idx++; | |
5963 | } | |
5f5c8ee5 | 5964 | /* Make sure we didn't overflow the vector. */ |
086ca913 | 5965 | eassert (idx <= ASIZE (state)); |
5f5c8ee5 GM |
5966 | return Qt; |
5967 | } | |
5968 | ||
5969 | ||
4588ec20 | 5970 | \f |
5f5c8ee5 GM |
5971 | /*********************************************************************** |
5972 | Initialization | |
5973 | ***********************************************************************/ | |
5974 | ||
5f5c8ee5 GM |
5975 | /* Initialization done when Emacs fork is started, before doing stty. |
5976 | Determine terminal type and set terminal_driver. Then invoke its | |
5977 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 5978 | |
dfcf069d | 5979 | void |
971de7fb | 5980 | init_display (void) |
4588ec20 | 5981 | { |
28d440ab KL |
5982 | char *terminal_type; |
5983 | ||
5f5c8ee5 GM |
5984 | /* Construct the space glyph. */ |
5985 | space_glyph.type = CHAR_GLYPH; | |
3fc809e2 | 5986 | SET_CHAR_GLYPH (space_glyph, ' ', DEFAULT_FACE_ID, 0); |
5f5c8ee5 GM |
5987 | space_glyph.charpos = -1; |
5988 | ||
4588ec20 JB |
5989 | inverse_video = 0; |
5990 | cursor_in_echo_area = 0; | |
4588ec20 | 5991 | |
1315c181 JB |
5992 | /* Now is the time to initialize this; it's used by init_sys_modes |
5993 | during startup. */ | |
2246281f | 5994 | Vinitial_window_system = Qnil; |
4588ec20 | 5995 | |
4181ad9c KL |
5996 | /* SIGWINCH needs to be handled no matter what display we start |
5997 | with. Otherwise newly opened tty frames will not resize | |
5998 | automatically. */ | |
5999 | #ifdef SIGWINCH | |
6000 | #ifndef CANNOT_DUMP | |
6001 | if (initialized) | |
6002 | #endif /* CANNOT_DUMP */ | |
2fe28299 PE |
6003 | { |
6004 | struct sigaction action; | |
6005 | emacs_sigaction_init (&action, deliver_window_change_signal); | |
6006 | sigaction (SIGWINCH, &action, 0); | |
6007 | } | |
4181ad9c | 6008 | #endif /* SIGWINCH */ |
4588ec20 | 6009 | |
d6ef42b9 | 6010 | /* If running as a daemon, no need to initialize any frames/terminal. */ |
ff808935 DN |
6011 | if (IS_DAEMON) |
6012 | return; | |
d6ef42b9 | 6013 | |
1315c181 JB |
6014 | /* If the user wants to use a window system, we shouldn't bother |
6015 | initializing the terminal. This is especially important when the | |
6016 | terminal is so dumb that emacs gives up before and doesn't bother | |
6017 | using the window system. | |
4588ec20 | 6018 | |
36bbad1d KH |
6019 | If the DISPLAY environment variable is set and nonempty, |
6020 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6021 | |
6022 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 6023 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 6024 | { |
36bbad1d | 6025 | char *display; |
36bbad1d | 6026 | display = getenv ("DISPLAY"); |
36bbad1d | 6027 | display_arg = (display != 0 && *display != 0); |
c1fc674b AS |
6028 | |
6029 | if (display_arg && !x_display_ok (display)) | |
6030 | { | |
6031 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
6032 | display); | |
6033 | inhibit_window_system = 1; | |
6034 | } | |
f040093a | 6035 | } |
d460af17 | 6036 | |
4fcc2638 | 6037 | if (!inhibit_window_system && display_arg) |
4588ec20 | 6038 | { |
111d9af3 | 6039 | Vinitial_window_system = Qx; |
4588ec20 JB |
6040 | #ifdef HAVE_X11 |
6041 | Vwindow_system_version = make_number (11); | |
039e5d71 | 6042 | #endif |
a29c3e6d | 6043 | #ifdef USE_NCURSES |
039e5d71 | 6044 | /* In some versions of ncurses, |
6a428f77 | 6045 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6046 | So call tgetent. */ |
6047 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 JB |
6048 | #endif |
6049 | return; | |
6050 | } | |
6051 | #endif /* HAVE_X_WINDOWS */ | |
6052 | ||
fd2e066a | 6053 | #ifdef HAVE_NTGUI |
177c0ea7 | 6054 | if (!inhibit_window_system) |
fd2e066a | 6055 | { |
111d9af3 | 6056 | Vinitial_window_system = Qw32; |
fd2e066a GV |
6057 | Vwindow_system_version = make_number (1); |
6058 | return; | |
6059 | } | |
6060 | #endif /* HAVE_NTGUI */ | |
6061 | ||
edfda783 AR |
6062 | #ifdef HAVE_NS |
6063 | if (!inhibit_window_system | |
6064 | #ifndef CANNOT_DUMP | |
6065 | && initialized | |
6066 | #endif | |
6067 | ) | |
6068 | { | |
111d9af3 | 6069 | Vinitial_window_system = Qns; |
5e617bc2 | 6070 | Vwindow_system_version = make_number (10); |
edfda783 AR |
6071 | return; |
6072 | } | |
6073 | #endif | |
6074 | ||
4588ec20 JB |
6075 | /* If no window system has been specified, try to use the terminal. */ |
6076 | if (! isatty (0)) | |
d9df6f40 | 6077 | fatal ("standard input is not a tty"); |
4588ec20 | 6078 | |
6152361f JR |
6079 | #ifdef WINDOWSNT |
6080 | terminal_type = "w32console"; | |
6081 | #else | |
83be8524 | 6082 | terminal_type = getenv ("TERM"); |
6152361f | 6083 | #endif |
4588ec20 JB |
6084 | if (!terminal_type) |
6085 | { | |
5d12ff0b | 6086 | #ifdef HAVE_WINDOW_SYSTEM |
b9e590fc RS |
6087 | if (! inhibit_window_system) |
6088 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6089 | else |
6090 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6091 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
4588ec20 JB |
6092 | exit (1); |
6093 | } | |
6094 | ||
0a125897 | 6095 | { |
6ed8eeff | 6096 | struct terminal *t; |
3224dac1 KL |
6097 | struct frame *f = XFRAME (selected_frame); |
6098 | ||
322aea6d PE |
6099 | init_foreground_group (); |
6100 | ||
3224dac1 | 6101 | /* Open a display on the controlling tty. */ |
6ed8eeff | 6102 | t = init_tty (0, terminal_type, 1); /* Errors are fatal. */ |
3224dac1 KL |
6103 | |
6104 | /* Convert the initial frame to use the new display. */ | |
b04f5ad2 | 6105 | if (f->output_method != output_initial) |
1088b922 | 6106 | emacs_abort (); |
6ed8eeff KL |
6107 | f->output_method = t->type; |
6108 | f->terminal = t; | |
3224dac1 | 6109 | |
6ed8eeff | 6110 | t->reference_count++; |
7ac5dac9 EZ |
6111 | #ifdef MSDOS |
6112 | f->output_data.tty->display_info = &the_only_display_info; | |
6113 | #else | |
6114 | if (f->output_method == output_termcap) | |
6115 | create_tty_output (f); | |
6116 | #endif | |
6ed8eeff | 6117 | t->display_info.tty->top_frame = selected_frame; |
5b65d888 | 6118 | change_frame_size (XFRAME (selected_frame), |
880e6158 MR |
6119 | FrameCols (t->display_info.tty), |
6120 | FrameRows (t->display_info.tty), 0, 0, 1, 0); | |
3224dac1 | 6121 | |
6ed8eeff KL |
6122 | /* Delete the initial terminal. */ |
6123 | if (--initial_terminal->reference_count == 0 | |
6124 | && initial_terminal->delete_terminal_hook) | |
6125 | (*initial_terminal->delete_terminal_hook) (initial_terminal); | |
2666355c KL |
6126 | |
6127 | /* Update frame parameters to reflect the new type. */ | |
6128 | Fmodify_frame_parameters | |
6c6f1994 PE |
6129 | (selected_frame, list1 (Fcons (Qtty_type, |
6130 | Ftty_type (selected_frame)))); | |
657ceaa0 | 6131 | if (t->display_info.tty->name) |
6c6f1994 PE |
6132 | Fmodify_frame_parameters |
6133 | (selected_frame, | |
6134 | list1 (Fcons (Qtty, build_string (t->display_info.tty->name)))); | |
657ceaa0 | 6135 | else |
6c6f1994 | 6136 | Fmodify_frame_parameters (selected_frame, list1 (Fcons (Qtty, Qnil))); |
0a125897 | 6137 | } |
3fc809e2 | 6138 | |
d86c299a | 6139 | { |
91fb7e1b | 6140 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6141 | int width = FRAME_TOTAL_COLS (sf); |
6142 | int height = FRAME_LINES (sf); | |
d86c299a | 6143 | |
5f5c8ee5 | 6144 | /* If these sizes are so big they cause overflow, just ignore the |
dfd153ae PE |
6145 | change. It's not clear what better we could do. The rest of |
6146 | the code assumes that (width + 2) * height * sizeof (struct glyph) | |
6147 | does not overflow and does not exceed PTRDIFF_MAX or SIZE_MAX. */ | |
e3c25c68 PE |
6148 | if (INT_ADD_RANGE_OVERFLOW (width, 2, INT_MIN, INT_MAX) |
6149 | || INT_MULTIPLY_RANGE_OVERFLOW (width + 2, height, INT_MIN, INT_MAX) | |
dfd153ae PE |
6150 | || (min (PTRDIFF_MAX, SIZE_MAX) / sizeof (struct glyph) |
6151 | < (width + 2) * height)) | |
1559a86d | 6152 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6153 | } |
6154 | ||
91fb7e1b | 6155 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6156 | |
5f5c8ee5 GM |
6157 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ |
6158 | if (initialized | |
6159 | && !noninteractive | |
2246281f | 6160 | && NILP (Vinitial_window_system)) |
2d764c78 EZ |
6161 | { |
6162 | /* For the initial frame, we don't have any way of knowing what | |
6163 | are the foreground and background colors of the terminal. */ | |
5e617bc2 | 6164 | struct frame *sf = SELECTED_FRAME (); |
2d764c78 | 6165 | |
f9d2fdc4 EZ |
6166 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
6167 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
6168 | call0 (intern ("tty-set-up-initial-frame-faces")); |
6169 | } | |
5f5c8ee5 GM |
6170 | } |
6171 | ||
6172 | ||
6173 | \f | |
6174 | /*********************************************************************** | |
6175 | Blinking cursor | |
6176 | ***********************************************************************/ | |
6177 | ||
c3f13540 | 6178 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 6179 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 6180 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
6181 | WINDOW nil means use the selected window. SHOW non-nil means |
6182 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 | 6183 | don't show a cursor. */) |
5842a27b | 6184 | (Lisp_Object window, Lisp_Object show) |
5f5c8ee5 | 6185 | { |
5f5c8ee5 GM |
6186 | /* Don't change cursor state while redisplaying. This could confuse |
6187 | output routines. */ | |
6188 | if (!redisplaying_p) | |
b9e9df47 | 6189 | decode_any_window (window)->cursor_off_p = NILP (show); |
5f5c8ee5 | 6190 | return Qnil; |
4588ec20 | 6191 | } |
5f5c8ee5 GM |
6192 | |
6193 | ||
5d7791b3 GM |
6194 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
6195 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 6196 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 | 6197 | WINDOW nil or omitted means report on the selected window. */) |
5842a27b | 6198 | (Lisp_Object window) |
5d7791b3 | 6199 | { |
b9e9df47 | 6200 | return decode_any_window (window)->cursor_off_p ? Qnil : Qt; |
5d7791b3 | 6201 | } |
4588ec20 | 6202 | \f |
5f5c8ee5 GM |
6203 | /*********************************************************************** |
6204 | Initialization | |
6205 | ***********************************************************************/ | |
6206 | ||
dfcf069d | 6207 | void |
971de7fb | 6208 | syms_of_display (void) |
4588ec20 | 6209 | { |
502b9b64 | 6210 | defsubr (&Sredraw_frame); |
4588ec20 | 6211 | defsubr (&Sredraw_display); |
078b3696 | 6212 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
6213 | defsubr (&Sopen_termscript); |
6214 | defsubr (&Sding); | |
7ba07a1a | 6215 | defsubr (&Sredisplay); |
4588ec20 JB |
6216 | defsubr (&Ssleep_for); |
6217 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 6218 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 6219 | defsubr (&Sinternal_show_cursor_p); |
4588ec20 | 6220 | |
e509cfa6 | 6221 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
6222 | defsubr (&Sdump_redisplay_history); |
6223 | #endif | |
6224 | ||
d1dad759 | 6225 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
6226 | staticpro (&frame_and_buffer_state); |
6227 | ||
cd3520a4 JB |
6228 | DEFSYM (Qdisplay_table, "display-table"); |
6229 | DEFSYM (Qredisplay_dont_pause, "redisplay-dont-pause"); | |
9cda4f7c | 6230 | |
29208e82 | 6231 | DEFVAR_INT ("baud-rate", baud_rate, |
025de85b | 6232 | doc: /* The output baud rate of the terminal. |
228299fa GM |
6233 | On most systems, changing this value will affect the amount of padding |
6234 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 6235 | |
29208e82 | 6236 | DEFVAR_BOOL ("inverse-video", inverse_video, |
025de85b | 6237 | doc: /* Non-nil means invert the entire frame display. |
228299fa | 6238 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 6239 | |
29208e82 | 6240 | DEFVAR_BOOL ("visible-bell", visible_bell, |
025de85b | 6241 | doc: /* Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
6242 | |
6243 | See also `ring-bell-function'. */); | |
177c0ea7 | 6244 | |
29208e82 | 6245 | DEFVAR_BOOL ("no-redraw-on-reenter", no_redraw_on_reenter, |
025de85b | 6246 | doc: /* Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
6247 | A non-nil value is useful if the terminal can automatically preserve |
6248 | Emacs's frame display when you reenter Emacs. | |
6249 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 6250 | |
29208e82 | 6251 | DEFVAR_LISP ("initial-window-system", Vinitial_window_system, |
2246281f | 6252 | doc: /* Name of the window system that Emacs uses for the first frame. |
89baa1df EZ |
6253 | The value is a symbol: |
6254 | nil for a termcap frame (a character-only terminal), | |
6255 | 'x' for an Emacs frame that is really an X window, | |
6256 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6257 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6258 | 'pc' for a direct-write MS-DOS frame. | |
6259 | ||
6260 | Use of this variable as a boolean is deprecated. Instead, | |
6261 | use `display-graphic-p' or any of the other `display-*-p' | |
6262 | predicates which report frame's specific UI-related capabilities. */); | |
177c0ea7 | 6263 | |
70b8d0a4 SM |
6264 | DEFVAR_KBOARD ("window-system", Vwindow_system, |
6265 | doc: /* Name of window system through which the selected frame is displayed. | |
89baa1df EZ |
6266 | The value is a symbol: |
6267 | nil for a termcap frame (a character-only terminal), | |
6268 | 'x' for an Emacs frame that is really an X window, | |
6269 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6270 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6271 | 'pc' for a direct-write MS-DOS frame. | |
6272 | ||
6273 | Use of this variable as a boolean is deprecated. Instead, | |
6274 | use `display-graphic-p' or any of the other `display-*-p' | |
6275 | predicates which report frame's specific UI-related capabilities. */); | |
70b8d0a4 | 6276 | |
29208e82 | 6277 | DEFVAR_LISP ("window-system-version", Vwindow_system_version, |
bacf09b4 | 6278 | doc: /* The version number of the window system in use. |
c22140f6 | 6279 | For X windows, this is 11. */); |
177c0ea7 | 6280 | |
29208e82 | 6281 | DEFVAR_BOOL ("cursor-in-echo-area", cursor_in_echo_area, |
bacf09b4 | 6282 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 6283 | |
29208e82 | 6284 | DEFVAR_LISP ("glyph-table", Vglyph_table, |
bacf09b4 | 6285 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
6286 | If not nil, this is a vector indexed by glyph code to define the glyph. |
6287 | Each element can be: | |
6288 | integer: a glyph code which this glyph is an alias for. | |
6289 | string: output this glyph using that string (not impl. in X windows). | |
6290 | nil: this glyph mod 524288 is the code of a character to output, | |
6291 | and this glyph / 524288 is the face number (see `face-id') to use | |
6292 | while outputting it. */); | |
4588ec20 JB |
6293 | Vglyph_table = Qnil; |
6294 | ||
29208e82 | 6295 | DEFVAR_LISP ("standard-display-table", Vstandard_display_table, |
bacf09b4 | 6296 | doc: /* Display table to use for buffers that specify none. |
228299fa | 6297 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
6298 | Vstandard_display_table = Qnil; |
6299 | ||
29208e82 | 6300 | DEFVAR_BOOL ("redisplay-dont-pause", redisplay_dont_pause, |
025de85b | 6301 | doc: /* Non-nil means display update isn't paused when input is detected. */); |
6bf7006f | 6302 | redisplay_dont_pause = 1; |
5f5c8ee5 | 6303 | |
4588ec20 JB |
6304 | #ifdef CANNOT_DUMP |
6305 | if (noninteractive) | |
6306 | #endif | |
6307 | { | |
2246281f | 6308 | Vinitial_window_system = Qnil; |
4588ec20 JB |
6309 | Vwindow_system_version = Qnil; |
6310 | } | |
6311 | } |