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 PE |
22 | |
23 | #define DISPEXTERN_INLINE EXTERN_INLINE | |
24 | ||
406af475 | 25 | #include "sysstdio.h" |
dfcf069d | 26 | #include <unistd.h> |
dfcf069d | 27 | |
47099d6f | 28 | #include "lisp.h" |
4588ec20 | 29 | #include "termchar.h" |
a0879520 | 30 | /* cm.h must come after dispextern.h on Windows. */ |
fd2e066a GV |
31 | #include "dispextern.h" |
32 | #include "cm.h" | |
83be827a | 33 | #include "character.h" |
e5560ff7 | 34 | #include "buffer.h" |
d43721a2 | 35 | #include "keyboard.h" |
502b9b64 | 36 | #include "frame.h" |
428a555e | 37 | #include "termhooks.h" |
4588ec20 JB |
38 | #include "window.h" |
39 | #include "commands.h" | |
40 | #include "disptab.h" | |
41 | #include "indent.h" | |
d169fe39 | 42 | #include "intervals.h" |
97cf50e7 | 43 | #include "blockinput.h" |
dfcf069d | 44 | #include "process.h" |
4588ec20 | 45 | |
58b2bb63 | 46 | #include "syssignal.h" |
a41f8bed | 47 | |
17a2cbbd DC |
48 | #ifdef HAVE_WINDOW_SYSTEM |
49 | #include TERM_HEADER | |
50 | #endif /* HAVE_WINDOW_SYSTEM */ | |
6cbd1643 | 51 | |
3883a901 RS |
52 | #include <errno.h> |
53 | ||
8148369c | 54 | #include <fpending.h> |
43aac990 | 55 | #include <timespec.h> |
5f5c8ee5 | 56 | |
9311dcff | 57 | #if defined (HAVE_TERM_H) && defined (GNU_LINUX) |
fa0ec9f4 DL |
58 | #include <term.h> /* for tgetent */ |
59 | #endif | |
a68089e4 EZ |
60 | |
61 | #ifdef WINDOWSNT | |
62 | #include "w32.h" | |
63 | #endif | |
5f5c8ee5 GM |
64 | \f |
65 | /* Structure to pass dimensions around. Used for character bounding | |
66 | boxes, glyph matrix dimensions and alike. */ | |
67 | ||
68 | struct dim | |
69 | { | |
70 | int width; | |
71 | int height; | |
72 | }; | |
73 | ||
74 | \f | |
75 | /* Function prototypes. */ | |
76 | ||
f57e2426 | 77 | static void update_frame_line (struct frame *, int); |
2f7c71a1 AS |
78 | static int required_matrix_height (struct window *); |
79 | static int required_matrix_width (struct window *); | |
f57e2426 | 80 | static void adjust_frame_glyphs (struct frame *); |
59ea14cd | 81 | static void change_frame_size_1 (struct frame *, int, int, bool, bool, bool); |
d311d28c | 82 | static void increment_row_positions (struct glyph_row *, ptrdiff_t, ptrdiff_t); |
f57e2426 J |
83 | static void fill_up_frame_row_with_spaces (struct glyph_row *, int); |
84 | static void build_frame_matrix_from_window_tree (struct glyph_matrix *, | |
85 | struct window *); | |
86 | static void build_frame_matrix_from_leaf_window (struct glyph_matrix *, | |
87 | struct window *); | |
f57e2426 J |
88 | static void adjust_decode_mode_spec_buffer (struct frame *); |
89 | static void fill_up_glyph_row_with_spaces (struct glyph_row *); | |
59ea14cd | 90 | static void clear_window_matrices (struct window *, bool); |
f57e2426 | 91 | static void fill_up_glyph_row_area_with_spaces (struct glyph_row *, int); |
59ea14cd PE |
92 | static int scrolling_window (struct window *, bool); |
93 | static bool update_window_line (struct window *, int, bool *); | |
f57e2426 | 94 | static void mirror_make_current (struct window *, int); |
e509cfa6 | 95 | #ifdef GLYPH_DEBUG |
f57e2426 J |
96 | static void check_matrix_pointers (struct glyph_matrix *, |
97 | struct glyph_matrix *); | |
b96fd3e8 | 98 | #endif |
f57e2426 | 99 | static void mirror_line_dance (struct window *, int, int, int *, char *); |
59ea14cd PE |
100 | static bool update_window_tree (struct window *, bool); |
101 | static bool update_window (struct window *, bool); | |
102 | static bool update_frame_1 (struct frame *, bool, bool); | |
103 | static bool scrolling (struct frame *); | |
f57e2426 | 104 | static void set_window_cursor_after_update (struct window *); |
f57e2426 J |
105 | static void adjust_frame_glyphs_for_window_redisplay (struct frame *); |
106 | static void adjust_frame_glyphs_for_frame_redisplay (struct frame *); | |
5f5c8ee5 | 107 | |
59ea14cd | 108 | /* True upon entry to redisplay means do not assume anything about |
502b9b64 | 109 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 110 | |
59ea14cd | 111 | bool frame_garbaged; |
4588ec20 | 112 | |
59ea14cd | 113 | /* True means last display completed. False means it was preempted. */ |
4588ec20 | 114 | |
59ea14cd | 115 | bool display_completed; |
4588ec20 | 116 | |
e7067d00 | 117 | Lisp_Object Qdisplay_table, Qredisplay_dont_pause; |
5f5c8ee5 | 118 | |
4588ec20 | 119 | \f |
5f5c8ee5 | 120 | /* The currently selected frame. In a single-frame version, this |
91fb7e1b | 121 | variable always equals the_only_frame. */ |
4588ec20 | 122 | |
91fb7e1b | 123 | Lisp_Object selected_frame; |
4588ec20 | 124 | |
5f5c8ee5 | 125 | /* A frame which is not just a mini-buffer, or 0 if there are no such |
502b9b64 | 126 | frames. This is usually the most recent such frame that was |
87485d6f MW |
127 | selected. In a single-frame version, this variable always holds |
128 | the address of the_only_frame. */ | |
4588ec20 | 129 | |
5f5c8ee5 | 130 | struct frame *last_nonminibuf_frame; |
d52bad65 | 131 | |
59ea14cd | 132 | /* True means SIGWINCH happened when not safe. */ |
4588ec20 | 133 | |
59ea14cd | 134 | static bool delayed_size_change; |
4588ec20 | 135 | |
5f5c8ee5 | 136 | /* A glyph for a space. */ |
4588ec20 | 137 | |
5f5c8ee5 | 138 | struct glyph space_glyph; |
4588ec20 | 139 | |
f0b79313 DA |
140 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
141 | ||
5f5c8ee5 GM |
142 | /* Counts of allocated structures. These counts serve to diagnose |
143 | memory leaks and double frees. */ | |
4588ec20 | 144 | |
5bf46f05 PE |
145 | static int glyph_matrix_count; |
146 | static int glyph_pool_count; | |
4588ec20 | 147 | |
f0b79313 DA |
148 | #endif /* GLYPH_DEBUG and ENABLE_CHECKING */ |
149 | ||
5f5c8ee5 GM |
150 | /* If non-null, the frame whose frame matrices are manipulated. If |
151 | null, window matrices are worked on. */ | |
4588ec20 | 152 | |
5f5c8ee5 | 153 | static struct frame *frame_matrix_frame; |
4588ec20 | 154 | |
59ea14cd | 155 | /* True means that fonts have been loaded since the last glyph |
5f5c8ee5 | 156 | matrix adjustments. Redisplay must stop, and glyph matrices must |
59ea14cd | 157 | be adjusted when this flag becomes true during display. The |
5f5c8ee5 | 158 | reason fonts can be loaded so late is that fonts of fontsets are |
3aa9f0c4 KH |
159 | loaded on demand. Another reason is that a line contains many |
160 | characters displayed by zero width or very narrow glyphs of | |
161 | variable-width fonts. */ | |
836d2cde | 162 | |
59ea14cd | 163 | bool fonts_changed_p; |
836d2cde | 164 | |
177c0ea7 | 165 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 166 | This may only be used for terminal frames. */ |
836d2cde | 167 | |
e509cfa6 | 168 | #ifdef GLYPH_DEBUG |
4588ec20 | 169 | |
f57e2426 J |
170 | static int window_to_frame_vpos (struct window *, int); |
171 | static int window_to_frame_hpos (struct window *, int); | |
5f5c8ee5 GM |
172 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) |
173 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 174 | |
9b0e97aa GM |
175 | /* One element of the ring buffer containing redisplay history |
176 | information. */ | |
177 | ||
178 | struct redisplay_history | |
179 | { | |
180 | char trace[512 + 100]; | |
181 | }; | |
182 | ||
183 | /* The size of the history buffer. */ | |
184 | ||
185 | #define REDISPLAY_HISTORY_SIZE 30 | |
186 | ||
187 | /* The redisplay history buffer. */ | |
188 | ||
189 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
190 | ||
191 | /* Next free entry in redisplay_history. */ | |
192 | ||
193 | static int history_idx; | |
194 | ||
195 | /* A tick that's incremented each time something is added to the | |
196 | history. */ | |
197 | ||
dfd153ae | 198 | static uprintmax_t history_tick; |
6a8aec41 | 199 | \f |
9b0e97aa GM |
200 | /* Add to the redisplay history how window W has been displayed. |
201 | MSG is a trace containing the information how W's glyph matrix | |
59ea14cd | 202 | has been constructed. PAUSED_P means that the update |
9b0e97aa GM |
203 | has been interrupted for pending input. */ |
204 | ||
205 | static void | |
59ea14cd | 206 | add_window_display_history (struct window *w, const char *msg, bool paused_p) |
9b0e97aa GM |
207 | { |
208 | char *buf; | |
29abe551 | 209 | void *ptr = w; |
177c0ea7 | 210 | |
9b0e97aa GM |
211 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
212 | history_idx = 0; | |
213 | buf = redisplay_history[history_idx].trace; | |
214 | ++history_idx; | |
177c0ea7 | 215 | |
8666506e PE |
216 | snprintf (buf, sizeof redisplay_history[0].trace, |
217 | "%"pMu": window %p (`%s')%s\n%s", | |
218 | history_tick++, | |
29abe551 | 219 | ptr, |
e74aeda8 DA |
220 | ((BUFFERP (w->contents) |
221 | && STRINGP (BVAR (XBUFFER (w->contents), name))) | |
222 | ? SSDATA (BVAR (XBUFFER (w->contents), name)) | |
8666506e PE |
223 | : "???"), |
224 | paused_p ? " ***paused***" : "", | |
225 | msg); | |
9b0e97aa GM |
226 | } |
227 | ||
228 | ||
229 | /* Add to the redisplay history that frame F has been displayed. | |
59ea14cd | 230 | PAUSED_P means that the update has been interrupted for |
9b0e97aa GM |
231 | pending input. */ |
232 | ||
233 | static void | |
59ea14cd | 234 | add_frame_display_history (struct frame *f, bool paused_p) |
9b0e97aa GM |
235 | { |
236 | char *buf; | |
29abe551 | 237 | void *ptr = f; |
177c0ea7 | 238 | |
9b0e97aa GM |
239 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
240 | history_idx = 0; | |
241 | buf = redisplay_history[history_idx].trace; | |
242 | ++history_idx; | |
177c0ea7 | 243 | |
dfd153ae | 244 | sprintf (buf, "%"pMu": update frame %p%s", |
9b0e97aa | 245 | history_tick++, |
29abe551 | 246 | ptr, paused_p ? " ***paused***" : ""); |
9b0e97aa GM |
247 | } |
248 | ||
249 | ||
a7ca3326 | 250 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, |
9b0e97aa | 251 | Sdump_redisplay_history, 0, 0, "", |
7ee72033 | 252 | doc: /* Dump redisplay history to stderr. */) |
5842a27b | 253 | (void) |
9b0e97aa GM |
254 | { |
255 | int i; | |
256 | ||
257 | for (i = history_idx - 1; i != history_idx; --i) | |
258 | { | |
259 | if (i < 0) | |
260 | i = REDISPLAY_HISTORY_SIZE - 1; | |
261 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
262 | } | |
263 | ||
264 | return Qnil; | |
265 | } | |
266 | ||
267 | ||
e509cfa6 | 268 | #else /* not GLYPH_DEBUG */ |
4588ec20 | 269 | |
7df02016 KS |
270 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
271 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 272 | |
e509cfa6 | 273 | #endif /* GLYPH_DEBUG */ |
4588ec20 | 274 | |
4588ec20 | 275 | |
9e4bf381 PE |
276 | #if (defined PROFILING \ |
277 | && (defined __FreeBSD__ || defined GNU_LINUX || defined __MINGW32__) \ | |
278 | && !HAVE___EXECUTABLE_START) | |
279 | /* This function comes first in the Emacs executable and is used only | |
280 | to estimate the text start for profiling. */ | |
4588ec20 | 281 | void |
9e4bf381 | 282 | __executable_start (void) |
4588ec20 | 283 | { |
1088b922 | 284 | emacs_abort (); |
177c0ea7 | 285 | } |
72af86bd | 286 | #endif |
5f5c8ee5 GM |
287 | \f |
288 | /*********************************************************************** | |
289 | Glyph Matrices | |
290 | ***********************************************************************/ | |
291 | ||
292 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
293 | pool from which memory for the matrix should be allocated, or null | |
294 | for window-based redisplay where no glyph pools are used. The | |
295 | member `pool' of the glyph matrix structure returned is set to | |
296 | POOL, the structure is otherwise zeroed. */ | |
297 | ||
5bf46f05 | 298 | static struct glyph_matrix * |
971de7fb | 299 | new_glyph_matrix (struct glyph_pool *pool) |
4588ec20 | 300 | { |
23f86fce | 301 | struct glyph_matrix *result = xzalloc (sizeof *result); |
4588ec20 | 302 | |
f0b79313 | 303 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
5f5c8ee5 GM |
304 | /* Increment number of allocated matrices. This count is used |
305 | to detect memory leaks. */ | |
306 | ++glyph_matrix_count; | |
f0b79313 | 307 | #endif |
4588ec20 | 308 | |
5f5c8ee5 GM |
309 | /* Set pool and return. */ |
310 | result->pool = pool; | |
311 | return result; | |
4588ec20 JB |
312 | } |
313 | ||
4588ec20 | 314 | |
5f5c8ee5 GM |
315 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
316 | ||
f0b79313 DA |
317 | If GLYPH_DEBUG and ENABLE_CHECKING are in effect, the global counter |
318 | glyph_matrix_count is decremented when a matrix is freed. If the count | |
319 | gets negative, more structures were freed than allocated, i.e. one matrix | |
320 | was freed more than once or a bogus pointer was passed to this function. | |
177c0ea7 | 321 | |
5f5c8ee5 GM |
322 | If MATRIX->pool is null, this means that the matrix manages its own |
323 | glyph memory---this is done for matrices on X frames. Freeing the | |
324 | matrix also frees the glyph memory in this case. */ | |
325 | ||
326 | static void | |
971de7fb | 327 | free_glyph_matrix (struct glyph_matrix *matrix) |
4588ec20 | 328 | { |
5f5c8ee5 GM |
329 | if (matrix) |
330 | { | |
331 | int i; | |
332 | ||
f0b79313 | 333 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
5f5c8ee5 GM |
334 | /* Detect the case that more matrices are freed than were |
335 | allocated. */ | |
f0b79313 DA |
336 | --glyph_matrix_count; |
337 | eassert (glyph_matrix_count >= 0); | |
338 | #endif | |
5f5c8ee5 GM |
339 | |
340 | /* Free glyph memory if MATRIX owns it. */ | |
341 | if (matrix->pool == NULL) | |
342 | for (i = 0; i < matrix->rows_allocated; ++i) | |
343 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 344 | |
5f5c8ee5 GM |
345 | /* Free row structures and the matrix itself. */ |
346 | xfree (matrix->rows); | |
347 | xfree (matrix); | |
348 | } | |
349 | } | |
4588ec20 | 350 | |
4588ec20 | 351 | |
5f5c8ee5 GM |
352 | /* Return the number of glyphs to reserve for a marginal area of |
353 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
354 | display line of window W. MARGIN gives the width of the marginal | |
eeaf9bf3 | 355 | area in canonical character units. */ |
5f5c8ee5 GM |
356 | |
357 | static int | |
eeaf9bf3 | 358 | margin_glyphs_to_reserve (struct window *w, int total_glyphs, int margin) |
5f5c8ee5 | 359 | { |
eeaf9bf3 | 360 | if (margin > 0) |
4588ec20 | 361 | { |
5f24fa51 | 362 | int width = w->total_cols; |
eeaf9bf3 | 363 | double d = max (0, margin); |
5f5c8ee5 | 364 | d = min (width / 2 - 1, d); |
eeaf9bf3 | 365 | return (int) ((double) total_glyphs / width * d); |
5f5c8ee5 | 366 | } |
eeaf9bf3 | 367 | return 0; |
5f5c8ee5 GM |
368 | } |
369 | ||
59ea14cd | 370 | /* Return true if ROW's hash value is correct. |
e509cfa6 DA |
371 | Optimized away if ENABLE_CHECKING is not defined. */ |
372 | ||
59ea14cd | 373 | static bool |
7a7270dd EZ |
374 | verify_row_hash (struct glyph_row *row) |
375 | { | |
015137db | 376 | return row->hash == row_hash (row); |
7a7270dd | 377 | } |
4588ec20 | 378 | |
5f5c8ee5 GM |
379 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
380 | window sizes. | |
4588ec20 | 381 | |
5f5c8ee5 GM |
382 | W is null if the function is called for a frame glyph matrix. |
383 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
384 | indices of the first column and row of MATRIX within the frame | |
385 | matrix, if such a matrix exists. They are zero for purely | |
386 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 387 | |
5f5c8ee5 GM |
388 | In window-based redisplay, where no frame matrices exist, glyph |
389 | matrices manage their own glyph storage. Otherwise, they allocate | |
390 | storage from a common frame glyph pool which can be found in | |
391 | MATRIX->pool. | |
23b0200c | 392 | |
5f5c8ee5 GM |
393 | The reason for this memory management strategy is to avoid complete |
394 | frame redraws if possible. When we allocate from a common pool, a | |
395 | change of the location or size of a sub-matrix within the pool | |
396 | requires a complete redisplay of the frame because we cannot easily | |
397 | make sure that the current matrices of all windows still agree with | |
398 | what is displayed on the screen. While this is usually fast, it | |
399 | leads to screen flickering. */ | |
23b0200c | 400 | |
5f5c8ee5 | 401 | static void |
971de7fb | 402 | adjust_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int x, int y, struct dim dim) |
5f5c8ee5 GM |
403 | { |
404 | int i; | |
405 | int new_rows; | |
59ea14cd PE |
406 | bool marginal_areas_changed_p = 0; |
407 | bool header_line_changed_p = 0; | |
408 | bool header_line_p = 0; | |
5f5c8ee5 | 409 | int left = -1, right = -1; |
ca8a12a7 | 410 | int window_width = -1, window_height = -1; |
5f5c8ee5 | 411 | |
6b61353c KH |
412 | /* See if W had a header line that has disappeared now, or vice versa. |
413 | Get W's size. */ | |
5f5c8ee5 GM |
414 | if (w) |
415 | { | |
c3c4768d | 416 | window_box (w, ANY_AREA, 0, 0, &window_width, &window_height); |
6b61353c | 417 | |
045dee35 GM |
418 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
419 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 420 | } |
045dee35 | 421 | matrix->header_line_p = header_line_p; |
23b0200c | 422 | |
6b61353c KH |
423 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
424 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
425 | haven't changed. This optimization is important because preserving |
426 | the matrix means preventing redisplay. */ | |
427 | if (matrix->pool == NULL) | |
428 | { | |
7df02016 KS |
429 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
430 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
a54e2c05 | 431 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
432 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs |
433 | || right != matrix->right_margin_glyphs); | |
434 | ||
435 | if (!marginal_areas_changed_p | |
436 | && !fonts_changed_p | |
045dee35 | 437 | && !header_line_changed_p |
7df02016 KS |
438 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
439 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
440 | && matrix->window_height == window_height |
441 | && matrix->window_vscroll == w->vscroll | |
442 | && matrix->window_width == window_width) | |
443 | return; | |
444 | } | |
177c0ea7 | 445 | |
5f5c8ee5 GM |
446 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
447 | if (matrix->rows_allocated < dim.height) | |
448 | { | |
0065d054 | 449 | int old_alloc = matrix->rows_allocated; |
5f5c8ee5 | 450 | new_rows = dim.height - matrix->rows_allocated; |
0065d054 PE |
451 | matrix->rows = xpalloc (matrix->rows, &matrix->rows_allocated, |
452 | new_rows, INT_MAX, sizeof *matrix->rows); | |
453 | memset (matrix->rows + old_alloc, 0, | |
454 | (matrix->rows_allocated - old_alloc) * sizeof *matrix->rows); | |
5f5c8ee5 GM |
455 | } |
456 | else | |
457 | new_rows = 0; | |
60a8948a | 458 | |
5f5c8ee5 GM |
459 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
460 | on a frame not using window-based redisplay. Set up pointers for | |
461 | each row into the glyph pool. */ | |
462 | if (matrix->pool) | |
463 | { | |
a54e2c05 | 464 | eassert (matrix->pool->glyphs); |
177c0ea7 | 465 | |
5f5c8ee5 | 466 | if (w) |
60a8948a | 467 | { |
5f5c8ee5 | 468 | left = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 469 | w->left_margin_cols); |
5f5c8ee5 | 470 | right = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 471 | w->right_margin_cols); |
60a8948a | 472 | } |
5f5c8ee5 GM |
473 | else |
474 | left = right = 0; | |
177c0ea7 | 475 | |
5f5c8ee5 | 476 | for (i = 0; i < dim.height; ++i) |
60a8948a | 477 | { |
5f5c8ee5 | 478 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
479 | |
480 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
481 | = (matrix->pool->glyphs |
482 | + (y + i) * matrix->pool->ncolumns | |
483 | + x); | |
177c0ea7 | 484 | |
5f5c8ee5 GM |
485 | if (w == NULL |
486 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 487 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
488 | { |
489 | row->glyphs[TEXT_AREA] | |
490 | = row->glyphs[LEFT_MARGIN_AREA]; | |
491 | row->glyphs[RIGHT_MARGIN_AREA] | |
492 | = row->glyphs[TEXT_AREA] + dim.width; | |
493 | row->glyphs[LAST_AREA] | |
494 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
495 | } | |
496 | else | |
497 | { | |
498 | row->glyphs[TEXT_AREA] | |
499 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
500 | row->glyphs[RIGHT_MARGIN_AREA] | |
501 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
502 | row->glyphs[LAST_AREA] | |
503 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
504 | } | |
60a8948a | 505 | } |
177c0ea7 | 506 | |
5f5c8ee5 GM |
507 | matrix->left_margin_glyphs = left; |
508 | matrix->right_margin_glyphs = right; | |
509 | } | |
510 | else | |
511 | { | |
512 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
6b61353c KH |
513 | its own memory. It is a window matrix for window-based redisplay. |
514 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
515 | if (dim.width > matrix->matrix_w |
516 | || new_rows | |
045dee35 | 517 | || header_line_changed_p |
5f5c8ee5 | 518 | || marginal_areas_changed_p) |
4588ec20 | 519 | { |
5f5c8ee5 GM |
520 | struct glyph_row *row = matrix->rows; |
521 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 522 | |
5f5c8ee5 GM |
523 | while (row < end) |
524 | { | |
525 | row->glyphs[LEFT_MARGIN_AREA] | |
0065d054 PE |
526 | = xnrealloc (row->glyphs[LEFT_MARGIN_AREA], |
527 | dim.width, sizeof (struct glyph)); | |
177c0ea7 | 528 | |
5f5c8ee5 GM |
529 | /* The mode line never has marginal areas. */ |
530 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 531 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
532 | { |
533 | row->glyphs[TEXT_AREA] | |
534 | = row->glyphs[LEFT_MARGIN_AREA]; | |
535 | row->glyphs[RIGHT_MARGIN_AREA] | |
536 | = row->glyphs[TEXT_AREA] + dim.width; | |
537 | row->glyphs[LAST_AREA] | |
538 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
539 | } | |
540 | else | |
541 | { | |
542 | row->glyphs[TEXT_AREA] | |
543 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
544 | row->glyphs[RIGHT_MARGIN_AREA] | |
545 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
546 | row->glyphs[LAST_AREA] | |
547 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
548 | } | |
549 | ++row; | |
550 | } | |
4588ec20 JB |
551 | } |
552 | ||
a54e2c05 | 553 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
554 | matrix->left_margin_glyphs = left; |
555 | matrix->right_margin_glyphs = right; | |
556 | } | |
177c0ea7 | 557 | |
5f5c8ee5 GM |
558 | /* Number of rows to be used by MATRIX. */ |
559 | matrix->nrows = dim.height; | |
a54e2c05 | 560 | eassert (matrix->nrows >= 0); |
5f5c8ee5 | 561 | |
b7b20fbd | 562 | if (w) |
5f5c8ee5 | 563 | { |
b7b20fbd | 564 | if (matrix == w->current_matrix) |
4588ec20 | 565 | { |
b7b20fbd GM |
566 | /* Mark rows in a current matrix of a window as not having |
567 | valid contents. It's important to not do this for | |
568 | desired matrices. When Emacs starts, it may already be | |
569 | building desired matrices when this function runs. */ | |
570 | if (window_width < 0) | |
571 | window_width = window_box_width (w, -1); | |
177c0ea7 | 572 | |
b7b20fbd GM |
573 | /* Optimize the case that only the height has changed (C-x 2, |
574 | upper window). Invalidate all rows that are no longer part | |
575 | of the window. */ | |
576 | if (!marginal_areas_changed_p | |
73d75a62 GM |
577 | && !header_line_changed_p |
578 | && new_rows == 0 | |
579 | && dim.width == matrix->matrix_w | |
7df02016 KS |
580 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
581 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 582 | && matrix->window_width == window_width) |
b7b20fbd | 583 | { |
dd42b31a GM |
584 | /* Find the last row in the window. */ |
585 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
586 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
587 | { | |
26447967 | 588 | ++i; |
dd42b31a GM |
589 | break; |
590 | } | |
b7b20fbd GM |
591 | |
592 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 593 | are invalidated below. */ |
02455cb6 | 594 | if (w->window_end_vpos >= i) |
9d93ce29 | 595 | w->window_end_valid = 0; |
177c0ea7 | 596 | |
b7b20fbd GM |
597 | while (i < matrix->nrows) |
598 | matrix->rows[i++].enabled_p = 0; | |
599 | } | |
600 | else | |
601 | { | |
602 | for (i = 0; i < matrix->nrows; ++i) | |
603 | matrix->rows[i].enabled_p = 0; | |
604 | } | |
5f5c8ee5 | 605 | } |
b7b20fbd | 606 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 607 | { |
b7b20fbd GM |
608 | /* Rows in desired matrices always have to be cleared; |
609 | redisplay expects this is the case when it runs, so it | |
610 | had better be the case when we adjust matrices between | |
611 | redisplays. */ | |
5f5c8ee5 GM |
612 | for (i = 0; i < matrix->nrows; ++i) |
613 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 614 | } |
4588ec20 | 615 | } |
177c0ea7 JB |
616 | |
617 | ||
5f5c8ee5 GM |
618 | /* Remember last values to be able to optimize frame redraws. */ |
619 | matrix->matrix_x = x; | |
620 | matrix->matrix_y = y; | |
621 | matrix->matrix_w = dim.width; | |
622 | matrix->matrix_h = dim.height; | |
623 | ||
624 | /* Record the top y location and height of W at the time the matrix | |
625 | was last adjusted. This is used to optimize redisplay above. */ | |
626 | if (w) | |
4588ec20 | 627 | { |
7df02016 KS |
628 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
629 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
630 | matrix->window_height = window_height; |
631 | matrix->window_width = window_width; | |
632 | matrix->window_vscroll = w->vscroll; | |
633 | } | |
634 | } | |
4588ec20 | 635 | |
4588ec20 | 636 | |
5f5c8ee5 GM |
637 | /* Reverse the contents of rows in MATRIX between START and END. The |
638 | contents of the row at END - 1 end up at START, END - 2 at START + | |
639 | 1 etc. This is part of the implementation of rotate_matrix (see | |
640 | below). */ | |
d52bad65 | 641 | |
5f5c8ee5 | 642 | static void |
971de7fb | 643 | reverse_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 GM |
644 | { |
645 | int i, j; | |
23b0200c | 646 | |
5f5c8ee5 GM |
647 | for (i = start, j = end - 1; i < j; ++i, --j) |
648 | { | |
649 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
650 | initialization. */ | |
651 | struct glyph_row temp; | |
652 | temp = matrix->rows[i]; | |
653 | matrix->rows[i] = matrix->rows[j]; | |
654 | matrix->rows[j] = temp; | |
655 | } | |
656 | } | |
23b0200c | 657 | |
23b0200c | 658 | |
5f5c8ee5 GM |
659 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
660 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
661 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
662 | row structures are moved around). | |
60a8948a | 663 | |
5f5c8ee5 GM |
664 | The algorithm used for rotating the vector was, I believe, first |
665 | described by Kernighan. See the vector R as consisting of two | |
666 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
667 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
668 | and reverse the result to get (ArBr)r which is BA. Similar for | |
669 | rotating right. */ | |
670 | ||
671 | void | |
971de7fb | 672 | rotate_matrix (struct glyph_matrix *matrix, int first, int last, int by) |
5f5c8ee5 GM |
673 | { |
674 | if (by < 0) | |
675 | { | |
676 | /* Up (rotate left, i.e. towards lower indices). */ | |
677 | by = -by; | |
678 | reverse_rows (matrix, first, first + by); | |
679 | reverse_rows (matrix, first + by, last); | |
680 | reverse_rows (matrix, first, last); | |
681 | } | |
682 | else if (by > 0) | |
683 | { | |
684 | /* Down (rotate right, i.e. towards higher indices). */ | |
685 | reverse_rows (matrix, last - by, last); | |
686 | reverse_rows (matrix, first, last - by); | |
687 | reverse_rows (matrix, first, last); | |
688 | } | |
689 | } | |
690 | ||
691 | ||
692 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
693 | with indices START <= index < END. Increment positions by DELTA/ | |
694 | DELTA_BYTES. */ | |
695 | ||
696 | void | |
ace1712c | 697 | increment_matrix_positions (struct glyph_matrix *matrix, int start, int end, |
d311d28c | 698 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
699 | { |
700 | /* Check that START and END are reasonable values. */ | |
a54e2c05 DA |
701 | eassert (start >= 0 && start <= matrix->nrows); |
702 | eassert (end >= 0 && end <= matrix->nrows); | |
703 | eassert (start <= end); | |
5f5c8ee5 GM |
704 | |
705 | for (; start < end; ++start) | |
86c11ba1 | 706 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
707 | } |
708 | ||
709 | ||
59ea14cd PE |
710 | /* Clear the enable_p flags in a range of rows in glyph matrix MATRIX. |
711 | START and END are the row indices of the first and last + 1 row to clear. */ | |
5f5c8ee5 GM |
712 | |
713 | void | |
59ea14cd | 714 | clear_glyph_matrix_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 | 715 | { |
a54e2c05 DA |
716 | eassert (start <= end); |
717 | eassert (start >= 0 && start < matrix->nrows); | |
718 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 719 | |
5f5c8ee5 | 720 | for (; start < end; ++start) |
59ea14cd | 721 | matrix->rows[start].enabled_p = 0; |
5f5c8ee5 GM |
722 | } |
723 | ||
724 | ||
725 | /* Clear MATRIX. | |
726 | ||
59ea14cd PE |
727 | Empty all rows in MATRIX by clearing their enabled_p flags. |
728 | The function prepare_desired_row will eventually really clear a row | |
729 | when it sees one with a false enabled_p flag. | |
5f5c8ee5 | 730 | |
59ea14cd | 731 | Reset update hints to default values. The only update hint |
5f5c8ee5 GM |
732 | currently present is the flag MATRIX->no_scrolling_p. */ |
733 | ||
734 | void | |
971de7fb | 735 | clear_glyph_matrix (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
736 | { |
737 | if (matrix) | |
738 | { | |
59ea14cd | 739 | clear_glyph_matrix_rows (matrix, 0, matrix->nrows); |
5f5c8ee5 GM |
740 | matrix->no_scrolling_p = 0; |
741 | } | |
742 | } | |
177c0ea7 | 743 | |
5f5c8ee5 GM |
744 | |
745 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
746 | Increment y-positions in glyph rows between START and END by DY, | |
747 | and recompute their visible height. */ | |
748 | ||
749 | void | |
971de7fb | 750 | shift_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int start, int end, int dy) |
5f5c8ee5 GM |
751 | { |
752 | int min_y, max_y; | |
177c0ea7 | 753 | |
a54e2c05 DA |
754 | eassert (start <= end); |
755 | eassert (start >= 0 && start < matrix->nrows); | |
756 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 757 | |
7df02016 KS |
758 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
759 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 760 | |
5f5c8ee5 GM |
761 | for (; start < end; ++start) |
762 | { | |
763 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 764 | |
5f5c8ee5 | 765 | row->y += dy; |
d6c747a4 | 766 | row->visible_height = row->height; |
177c0ea7 | 767 | |
5f5c8ee5 | 768 | if (row->y < min_y) |
d6c747a4 GM |
769 | row->visible_height -= min_y - row->y; |
770 | if (row->y + row->height > max_y) | |
771 | row->visible_height -= row->y + row->height - max_y; | |
e61124cd YM |
772 | if (row->fringe_bitmap_periodic_p) |
773 | row->redraw_fringe_bitmaps_p = 1; | |
5f5c8ee5 GM |
774 | } |
775 | } | |
776 | ||
777 | ||
778 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
779 | invalid is done by setting enabled_p to zero for all rows in a | |
780 | current matrix. */ | |
781 | ||
782 | void | |
971de7fb | 783 | clear_current_matrices (register struct frame *f) |
5f5c8ee5 GM |
784 | { |
785 | /* Clear frame current matrix, if we have one. */ | |
786 | if (f->current_matrix) | |
787 | clear_glyph_matrix (f->current_matrix); | |
788 | ||
5a49b79c | 789 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
790 | /* Clear the matrix of the menu bar window, if such a window exists. |
791 | The menu bar window is currently used to display menus on X when | |
792 | no toolkit support is compiled in. */ | |
793 | if (WINDOWP (f->menu_bar_window)) | |
794 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
5a49b79c | 795 | #endif |
5f5c8ee5 | 796 | |
9ea173e8 GM |
797 | /* Clear the matrix of the tool-bar window, if any. */ |
798 | if (WINDOWP (f->tool_bar_window)) | |
799 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
5f5c8ee5 GM |
800 | |
801 | /* Clear current window matrices. */ | |
a54e2c05 | 802 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
803 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); |
804 | } | |
805 | ||
806 | ||
807 | /* Clear out all display lines of F for a coming redisplay. */ | |
808 | ||
809 | void | |
971de7fb | 810 | clear_desired_matrices (register struct frame *f) |
5f5c8ee5 GM |
811 | { |
812 | if (f->desired_matrix) | |
813 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 814 | |
5a49b79c | 815 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
816 | if (WINDOWP (f->menu_bar_window)) |
817 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
5a49b79c | 818 | #endif |
5f5c8ee5 | 819 | |
9ea173e8 GM |
820 | if (WINDOWP (f->tool_bar_window)) |
821 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
5f5c8ee5 GM |
822 | |
823 | /* Do it for window matrices. */ | |
a54e2c05 | 824 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
825 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); |
826 | } | |
827 | ||
828 | ||
59ea14cd PE |
829 | /* Clear matrices in window tree rooted in W. If DESIRED_P, |
830 | clear desired matrices, otherwise clear current matrices. */ | |
5f5c8ee5 GM |
831 | |
832 | static void | |
59ea14cd | 833 | clear_window_matrices (struct window *w, bool desired_p) |
5f5c8ee5 GM |
834 | { |
835 | while (w) | |
836 | { | |
e74aeda8 DA |
837 | if (WINDOWP (w->contents)) |
838 | clear_window_matrices (XWINDOW (w->contents), desired_p); | |
5f5c8ee5 GM |
839 | else |
840 | { | |
841 | if (desired_p) | |
842 | clear_glyph_matrix (w->desired_matrix); | |
843 | else | |
844 | { | |
845 | clear_glyph_matrix (w->current_matrix); | |
9d93ce29 | 846 | w->window_end_valid = 0; |
5f5c8ee5 GM |
847 | } |
848 | } | |
849 | ||
850 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
851 | } | |
852 | } | |
853 | ||
854 | ||
855 | \f | |
856 | /*********************************************************************** | |
857 | Glyph Rows | |
858 | ||
859 | See dispextern.h for an overall explanation of glyph rows. | |
860 | ***********************************************************************/ | |
861 | ||
862 | /* Clear glyph row ROW. Do it in a way that makes it robust against | |
863 | changes in the glyph_row structure, i.e. addition or removal of | |
864 | structure members. */ | |
865 | ||
2cca872d KH |
866 | static struct glyph_row null_row; |
867 | ||
5f5c8ee5 | 868 | void |
971de7fb | 869 | clear_glyph_row (struct glyph_row *row) |
5f5c8ee5 GM |
870 | { |
871 | struct glyph *p[1 + LAST_AREA]; | |
5f5c8ee5 GM |
872 | |
873 | /* Save pointers. */ | |
874 | p[LEFT_MARGIN_AREA] = row->glyphs[LEFT_MARGIN_AREA]; | |
875 | p[TEXT_AREA] = row->glyphs[TEXT_AREA]; | |
876 | p[RIGHT_MARGIN_AREA] = row->glyphs[RIGHT_MARGIN_AREA]; | |
877 | p[LAST_AREA] = row->glyphs[LAST_AREA]; | |
878 | ||
879 | /* Clear. */ | |
880 | *row = null_row; | |
881 | ||
882 | /* Restore pointers. */ | |
883 | row->glyphs[LEFT_MARGIN_AREA] = p[LEFT_MARGIN_AREA]; | |
884 | row->glyphs[TEXT_AREA] = p[TEXT_AREA]; | |
885 | row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA]; | |
886 | row->glyphs[LAST_AREA] = p[LAST_AREA]; | |
45560b1a GM |
887 | |
888 | #if 0 /* At some point, some bit-fields of struct glyph were not set, | |
889 | which made glyphs unequal when compared with GLYPH_EQUAL_P. | |
890 | Redisplay outputs such glyphs, and flickering effects were | |
891 | the result. This also depended on the contents of memory | |
892 | returned by xmalloc. If flickering happens again, activate | |
153a073c | 893 | the code below. If the flickering is gone with that, chances |
45560b1a | 894 | are that the flickering has the same reason as here. */ |
72af86bd | 895 | memset (p[0], 0, (char *) p[LAST_AREA] - (char *) p[0]); |
45560b1a | 896 | #endif |
5f5c8ee5 GM |
897 | } |
898 | ||
899 | ||
900 | /* Make ROW an empty, enabled row of canonical character height, | |
901 | in window W starting at y-position Y. */ | |
902 | ||
903 | void | |
971de7fb | 904 | blank_row (struct window *w, struct glyph_row *row, int y) |
5f5c8ee5 GM |
905 | { |
906 | int min_y, max_y; | |
177c0ea7 | 907 | |
7df02016 KS |
908 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
909 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 910 | |
5f5c8ee5 GM |
911 | clear_glyph_row (row); |
912 | row->y = y; | |
408f5064 | 913 | row->ascent = row->phys_ascent = 0; |
7df02016 | 914 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 915 | row->visible_height = row->height; |
177c0ea7 | 916 | |
5f5c8ee5 | 917 | if (row->y < min_y) |
d6c747a4 GM |
918 | row->visible_height -= min_y - row->y; |
919 | if (row->y + row->height > max_y) | |
920 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
921 | |
922 | row->enabled_p = 1; | |
923 | } | |
924 | ||
925 | ||
926 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
927 | are the amounts by which to change positions. Note that the first | |
928 | glyph of the text area of a row can have a buffer position even if | |
929 | the used count of the text area is zero. Such rows display line | |
930 | ends. */ | |
931 | ||
5bf46f05 | 932 | static void |
ace1712c | 933 | increment_row_positions (struct glyph_row *row, |
d311d28c | 934 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
935 | { |
936 | int area, i; | |
937 | ||
938 | /* Increment start and end positions. */ | |
939 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
940 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
941 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
942 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
d36fe237 EZ |
943 | CHARPOS (row->start.pos) += delta; |
944 | BYTEPOS (row->start.pos) += delta_bytes; | |
945 | CHARPOS (row->end.pos) += delta; | |
946 | BYTEPOS (row->end.pos) += delta_bytes; | |
5f5c8ee5 | 947 | |
5cacdcfd KS |
948 | if (!row->enabled_p) |
949 | return; | |
950 | ||
5f5c8ee5 GM |
951 | /* Increment positions in glyphs. */ |
952 | for (area = 0; area < LAST_AREA; ++area) | |
953 | for (i = 0; i < row->used[area]; ++i) | |
954 | if (BUFFERP (row->glyphs[area][i].object) | |
955 | && row->glyphs[area][i].charpos > 0) | |
956 | row->glyphs[area][i].charpos += delta; | |
957 | ||
958 | /* Capture the case of rows displaying a line end. */ | |
959 | if (row->used[TEXT_AREA] == 0 | |
960 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
961 | row->glyphs[TEXT_AREA]->charpos += delta; | |
962 | } | |
963 | ||
964 | ||
9af3e742 | 965 | #if 0 |
5f5c8ee5 GM |
966 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
967 | contents, i.e. glyph structure contents are exchanged between A and | |
968 | B without changing glyph pointers in A and B. */ | |
969 | ||
970 | static void | |
1dae0f0a | 971 | swap_glyphs_in_rows (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
972 | { |
973 | int area; | |
974 | ||
975 | for (area = 0; area < LAST_AREA; ++area) | |
976 | { | |
977 | /* Number of glyphs to swap. */ | |
978 | int max_used = max (a->used[area], b->used[area]); | |
979 | ||
980 | /* Start of glyphs in area of row A. */ | |
981 | struct glyph *glyph_a = a->glyphs[area]; | |
982 | ||
983 | /* End + 1 of glyphs in area of row A. */ | |
984 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
985 | ||
986 | /* Start of glyphs in area of row B. */ | |
987 | struct glyph *glyph_b = b->glyphs[area]; | |
988 | ||
989 | while (glyph_a < glyph_a_end) | |
990 | { | |
991 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
992 | initialization. */ | |
993 | struct glyph temp; | |
994 | temp = *glyph_a; | |
995 | *glyph_a = *glyph_b; | |
996 | *glyph_b = temp; | |
997 | ++glyph_a; | |
998 | ++glyph_b; | |
999 | } | |
1000 | } | |
1001 | } | |
1002 | ||
9af3e742 | 1003 | #endif /* 0 */ |
5f5c8ee5 | 1004 | |
015137db EZ |
1005 | /* Exchange pointers to glyph memory between glyph rows A and B. Also |
1006 | exchange the used[] array and the hash values of the rows, because | |
1007 | these should all go together for the row's hash value to be | |
1008 | correct. */ | |
5f5c8ee5 | 1009 | |
b0ab8123 | 1010 | static void |
971de7fb | 1011 | swap_glyph_pointers (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1012 | { |
1013 | int i; | |
015137db EZ |
1014 | unsigned hash_tem = a->hash; |
1015 | ||
5f5c8ee5 GM |
1016 | for (i = 0; i < LAST_AREA + 1; ++i) |
1017 | { | |
1018 | struct glyph *temp = a->glyphs[i]; | |
015137db | 1019 | |
5f5c8ee5 GM |
1020 | a->glyphs[i] = b->glyphs[i]; |
1021 | b->glyphs[i] = temp; | |
73055685 EZ |
1022 | if (i < LAST_AREA) |
1023 | { | |
1024 | short used_tem = a->used[i]; | |
1025 | ||
1026 | a->used[i] = b->used[i]; | |
1027 | b->used[i] = used_tem; | |
1028 | } | |
5f5c8ee5 | 1029 | } |
015137db EZ |
1030 | a->hash = b->hash; |
1031 | b->hash = hash_tem; | |
5f5c8ee5 GM |
1032 | } |
1033 | ||
1034 | ||
1035 | /* Copy glyph row structure FROM to glyph row structure TO, except | |
015137db EZ |
1036 | that glyph pointers, the `used' counts, and the hash values in the |
1037 | structures are left unchanged. */ | |
5f5c8ee5 | 1038 | |
b0ab8123 | 1039 | static void |
971de7fb | 1040 | copy_row_except_pointers (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1041 | { |
1042 | struct glyph *pointers[1 + LAST_AREA]; | |
73055685 | 1043 | short used[LAST_AREA]; |
015137db | 1044 | unsigned hashval; |
5f5c8ee5 GM |
1045 | |
1046 | /* Save glyph pointers of TO. */ | |
72af86bd | 1047 | memcpy (pointers, to->glyphs, sizeof to->glyphs); |
015137db EZ |
1048 | memcpy (used, to->used, sizeof to->used); |
1049 | hashval = to->hash; | |
5f5c8ee5 GM |
1050 | |
1051 | /* Do a structure assignment. */ | |
1052 | *to = *from; | |
1053 | ||
1054 | /* Restore original pointers of TO. */ | |
72af86bd | 1055 | memcpy (to->glyphs, pointers, sizeof to->glyphs); |
015137db EZ |
1056 | memcpy (to->used, used, sizeof to->used); |
1057 | to->hash = hashval; | |
5f5c8ee5 GM |
1058 | } |
1059 | ||
1060 | ||
5f5c8ee5 GM |
1061 | /* Assign glyph row FROM to glyph row TO. This works like a structure |
1062 | assignment TO = FROM, except that glyph pointers are not copied but | |
1063 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1064 | a memory leak. */ | |
1065 | ||
b0ab8123 | 1066 | static void |
971de7fb | 1067 | assign_row (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1068 | { |
1069 | swap_glyph_pointers (to, from); | |
1070 | copy_row_except_pointers (to, from); | |
1071 | } | |
1072 | ||
1073 | ||
1074 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1075 | a row in a window matrix, is a slice of the glyph memory of the | |
1076 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
59ea14cd | 1077 | is true if the glyph memory of WINDOW_ROW is part of the glyph |
5f5c8ee5 GM |
1078 | memory of FRAME_ROW. */ |
1079 | ||
e509cfa6 | 1080 | #ifdef GLYPH_DEBUG |
9339e87f | 1081 | |
59ea14cd | 1082 | static bool |
59fc5cf9 | 1083 | glyph_row_slice_p (struct glyph_row *window_row, struct glyph_row *frame_row) |
5f5c8ee5 GM |
1084 | { |
1085 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1086 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1087 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1088 | ||
1089 | return (frame_glyph_start <= window_glyph_start | |
1090 | && window_glyph_start < frame_glyph_end); | |
1091 | } | |
1092 | ||
9339e87f | 1093 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1094 | |
9af3e742 GM |
1095 | #if 0 |
1096 | ||
5f5c8ee5 GM |
1097 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1098 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1099 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1100 | ||
1101 | static struct glyph_row * | |
59fc5cf9 AS |
1102 | find_glyph_row_slice (struct glyph_matrix *window_matrix, |
1103 | struct glyph_matrix *frame_matrix, int row) | |
5f5c8ee5 GM |
1104 | { |
1105 | int i; | |
1106 | ||
a54e2c05 | 1107 | eassert (row >= 0 && row < frame_matrix->nrows); |
5f5c8ee5 GM |
1108 | |
1109 | for (i = 0; i < window_matrix->nrows; ++i) | |
1110 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1111 | frame_matrix->rows + row)) | |
1112 | break; | |
1113 | ||
1114 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1115 | } | |
1116 | ||
9af3e742 | 1117 | #endif /* 0 */ |
5f5c8ee5 GM |
1118 | |
1119 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1120 | i.e. they are only marked as to be cleared by setting their | |
1121 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1122 | call to this function really clears it. */ | |
1123 | ||
1124 | void | |
971de7fb | 1125 | prepare_desired_row (struct glyph_row *row) |
5f5c8ee5 GM |
1126 | { |
1127 | if (!row->enabled_p) | |
1128 | { | |
59ea14cd | 1129 | bool rp = row->reversed_p; |
5009f85e | 1130 | |
5f5c8ee5 GM |
1131 | clear_glyph_row (row); |
1132 | row->enabled_p = 1; | |
5009f85e | 1133 | row->reversed_p = rp; |
5f5c8ee5 GM |
1134 | } |
1135 | } | |
1136 | ||
1137 | ||
1138 | /* Return a hash code for glyph row ROW. */ | |
1139 | ||
2f7c71a1 | 1140 | static int |
971de7fb | 1141 | line_hash_code (struct glyph_row *row) |
5f5c8ee5 GM |
1142 | { |
1143 | int hash = 0; | |
177c0ea7 | 1144 | |
5f5c8ee5 GM |
1145 | if (row->enabled_p) |
1146 | { | |
4cecaab8 MB |
1147 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1148 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1149 | ||
1150 | while (glyph < end) | |
1151 | { | |
1152 | int c = glyph->u.ch; | |
1153 | int face_id = glyph->face_id; | |
daf01701 | 1154 | if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
4cecaab8 MB |
1155 | c -= SPACEGLYPH; |
1156 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1157 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1158 | ++glyph; | |
1159 | } | |
5f5c8ee5 | 1160 | |
4cecaab8 MB |
1161 | if (hash == 0) |
1162 | hash = 1; | |
5f5c8ee5 GM |
1163 | } |
1164 | ||
1165 | return hash; | |
1166 | } | |
1167 | ||
1168 | ||
153a073c | 1169 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1170 | the number of characters in the line. If must_write_spaces is |
1171 | zero, leading and trailing spaces are ignored. */ | |
1172 | ||
dfd153ae | 1173 | static int |
971de7fb | 1174 | line_draw_cost (struct glyph_matrix *matrix, int vpos) |
5f5c8ee5 GM |
1175 | { |
1176 | struct glyph_row *row = matrix->rows + vpos; | |
1177 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1178 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1179 | int len; | |
1180 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
ca9ce8f2 | 1181 | ptrdiff_t glyph_table_len = GLYPH_TABLE_LENGTH; |
5f5c8ee5 GM |
1182 | |
1183 | /* Ignore trailing and leading spaces if we can. */ | |
daf01701 | 1184 | if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
5f5c8ee5 GM |
1185 | { |
1186 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1187 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1188 | --end; |
1189 | ||
177c0ea7 | 1190 | /* All blank line. */ |
5f5c8ee5 GM |
1191 | if (end == beg) |
1192 | return 0; | |
1193 | ||
1194 | /* Skip over leading spaces. */ | |
1195 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1196 | ++beg; | |
1197 | } | |
1198 | ||
1199 | /* If we don't have a glyph-table, each glyph is one character, | |
1200 | so return the number of glyphs. */ | |
1201 | if (glyph_table_base == 0) | |
1202 | len = end - beg; | |
1203 | else | |
1204 | { | |
1205 | /* Otherwise, scan the glyphs and accumulate their total length | |
1206 | in LEN. */ | |
1207 | len = 0; | |
1208 | while (beg < end) | |
1209 | { | |
3fc809e2 | 1210 | GLYPH g; |
177c0ea7 | 1211 | |
3fc809e2 KS |
1212 | SET_GLYPH_FROM_CHAR_GLYPH (g, *beg); |
1213 | ||
565b39a8 | 1214 | if (GLYPH_INVALID_P (g) |
42186983 | 1215 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) |
5f5c8ee5 GM |
1216 | len += 1; |
1217 | else | |
1218 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1219 | |
5f5c8ee5 GM |
1220 | ++beg; |
1221 | } | |
1222 | } | |
177c0ea7 | 1223 | |
5f5c8ee5 GM |
1224 | return len; |
1225 | } | |
1226 | ||
1227 | ||
59ea14cd PE |
1228 | /* Return true if the glyph rows A and B have equal contents. |
1229 | MOUSE_FACE_P means compare the mouse_face_p flags of A and B, too. */ | |
5f5c8ee5 | 1230 | |
b0ab8123 | 1231 | static bool |
59ea14cd | 1232 | row_equal_p (struct glyph_row *a, struct glyph_row *b, bool mouse_face_p) |
5f5c8ee5 | 1233 | { |
a54e2c05 DA |
1234 | eassert (verify_row_hash (a)); |
1235 | eassert (verify_row_hash (b)); | |
7a7270dd | 1236 | |
5f5c8ee5 GM |
1237 | if (a == b) |
1238 | return 1; | |
1239 | else if (a->hash != b->hash) | |
1240 | return 0; | |
1241 | else | |
1242 | { | |
1243 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1244 | int area; | |
1245 | ||
e4e0bee9 GM |
1246 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1247 | return 0; | |
1248 | ||
5f5c8ee5 GM |
1249 | /* Compare glyphs. */ |
1250 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1251 | { | |
1252 | if (a->used[area] != b->used[area]) | |
1253 | return 0; | |
177c0ea7 | 1254 | |
5f5c8ee5 GM |
1255 | a_glyph = a->glyphs[area]; |
1256 | a_end = a_glyph + a->used[area]; | |
1257 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1258 | |
5f5c8ee5 GM |
1259 | while (a_glyph < a_end |
1260 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1261 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1262 | |
5f5c8ee5 GM |
1263 | if (a_glyph != a_end) |
1264 | return 0; | |
1265 | } | |
1266 | ||
6b61353c KH |
1267 | if (a->fill_line_p != b->fill_line_p |
1268 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1269 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
1270 | || a->left_fringe_face_id != b->left_fringe_face_id | |
e61124cd | 1271 | || a->left_fringe_offset != b->left_fringe_offset |
6b61353c KH |
1272 | || a->right_fringe_bitmap != b->right_fringe_bitmap |
1273 | || a->right_fringe_face_id != b->right_fringe_face_id | |
e61124cd YM |
1274 | || a->right_fringe_offset != b->right_fringe_offset |
1275 | || a->fringe_bitmap_periodic_p != b->fringe_bitmap_periodic_p | |
3d4a365f | 1276 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
6b61353c | 1277 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1278 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1279 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1280 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
918f4159 | 1281 | || a->reversed_p != b->reversed_p |
5f5c8ee5 GM |
1282 | /* Different partially visible characters on left margin. */ |
1283 | || a->x != b->x | |
1284 | /* Different height. */ | |
1285 | || a->ascent != b->ascent | |
408f5064 GM |
1286 | || a->phys_ascent != b->phys_ascent |
1287 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1288 | || a->visible_height != b->visible_height) |
1289 | return 0; | |
1290 | } | |
1291 | ||
1292 | return 1; | |
1293 | } | |
1294 | ||
1295 | ||
1296 | \f | |
1297 | /*********************************************************************** | |
1298 | Glyph Pool | |
1299 | ||
1300 | See dispextern.h for an overall explanation of glyph pools. | |
1301 | ***********************************************************************/ | |
1302 | ||
f0b79313 DA |
1303 | /* Allocate a glyph_pool structure. The structure returned is initialized |
1304 | with zeros. If GLYPH_DEBUG and ENABLE_CHECKING are in effect, the global | |
1305 | variable glyph_pool_count is incremented for each pool allocated. */ | |
5f5c8ee5 GM |
1306 | |
1307 | static struct glyph_pool * | |
971de7fb | 1308 | new_glyph_pool (void) |
5f5c8ee5 | 1309 | { |
23f86fce | 1310 | struct glyph_pool *result = xzalloc (sizeof *result); |
177c0ea7 | 1311 | |
f0b79313 | 1312 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
5f5c8ee5 GM |
1313 | /* For memory leak and double deletion checking. */ |
1314 | ++glyph_pool_count; | |
f0b79313 | 1315 | #endif |
177c0ea7 | 1316 | |
5f5c8ee5 GM |
1317 | return result; |
1318 | } | |
1319 | ||
1320 | ||
1321 | /* Free a glyph_pool structure POOL. The function may be called with | |
f0b79313 DA |
1322 | a null POOL pointer. If GLYPH_DEBUG and ENABLE_CHECKING are in effect, |
1323 | global variable glyph_pool_count is decremented with every pool structure | |
1324 | freed. If this count gets negative, more structures were freed than | |
1325 | allocated, i.e. one structure must have been freed more than once or | |
1326 | a bogus pointer was passed to free_glyph_pool. */ | |
5f5c8ee5 GM |
1327 | |
1328 | static void | |
971de7fb | 1329 | free_glyph_pool (struct glyph_pool *pool) |
5f5c8ee5 GM |
1330 | { |
1331 | if (pool) | |
1332 | { | |
f0b79313 | 1333 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
153a073c | 1334 | /* More freed than allocated? */ |
5f5c8ee5 | 1335 | --glyph_pool_count; |
a54e2c05 | 1336 | eassert (glyph_pool_count >= 0); |
f0b79313 | 1337 | #endif |
5f5c8ee5 GM |
1338 | xfree (pool->glyphs); |
1339 | xfree (pool); | |
1340 | } | |
1341 | } | |
1342 | ||
1343 | ||
1344 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1345 | columns we need. This function never shrinks a pool. The only | |
1346 | case in which this would make sense, would be when a frame's size | |
1347 | is changed from a large value to a smaller one. But, if someone | |
1348 | does it once, we can expect that he will do it again. | |
1349 | ||
59ea14cd | 1350 | Return true if the pool changed in a way which makes |
5f5c8ee5 GM |
1351 | re-adjusting window glyph matrices necessary. */ |
1352 | ||
59ea14cd | 1353 | static bool |
971de7fb | 1354 | realloc_glyph_pool (struct glyph_pool *pool, struct dim matrix_dim) |
5f5c8ee5 | 1355 | { |
ca9ce8f2 | 1356 | ptrdiff_t needed; |
59ea14cd | 1357 | bool changed_p; |
5f5c8ee5 GM |
1358 | |
1359 | changed_p = (pool->glyphs == 0 | |
1360 | || matrix_dim.height != pool->nrows | |
1361 | || matrix_dim.width != pool->ncolumns); | |
1362 | ||
1363 | /* Enlarge the glyph pool. */ | |
ca9ce8f2 | 1364 | needed = matrix_dim.width; |
0065d054 PE |
1365 | if (INT_MULTIPLY_OVERFLOW (needed, matrix_dim.height)) |
1366 | memory_full (SIZE_MAX); | |
ca9ce8f2 | 1367 | needed *= matrix_dim.height; |
5f5c8ee5 GM |
1368 | if (needed > pool->nglyphs) |
1369 | { | |
0065d054 PE |
1370 | ptrdiff_t old_nglyphs = pool->nglyphs; |
1371 | pool->glyphs = xpalloc (pool->glyphs, &pool->nglyphs, | |
1372 | needed - old_nglyphs, -1, sizeof *pool->glyphs); | |
1373 | memset (pool->glyphs + old_nglyphs, 0, | |
1374 | (pool->nglyphs - old_nglyphs) * sizeof *pool->glyphs); | |
5f5c8ee5 GM |
1375 | } |
1376 | ||
153a073c | 1377 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1378 | to do sanity checks, and (b) the number of columns determines |
1379 | where rows in the frame matrix start---this must be available to | |
1380 | determine pointers to rows of window sub-matrices. */ | |
1381 | pool->nrows = matrix_dim.height; | |
1382 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1383 | |
5f5c8ee5 GM |
1384 | return changed_p; |
1385 | } | |
1386 | ||
1387 | ||
1388 | \f | |
1389 | /*********************************************************************** | |
1390 | Debug Code | |
1391 | ***********************************************************************/ | |
1392 | ||
e509cfa6 | 1393 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 1394 | |
a13396c9 | 1395 | |
28d440ab KL |
1396 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1397 | XXX Maybe this should be changed to flush the current terminal instead of | |
1398 | stdout. | |
1399 | */ | |
a13396c9 | 1400 | |
85fece3e PE |
1401 | void flush_stdout (void) EXTERNALLY_VISIBLE; |
1402 | ||
a13396c9 | 1403 | void |
59fc5cf9 | 1404 | flush_stdout (void) |
a13396c9 GM |
1405 | { |
1406 | fflush (stdout); | |
1407 | } | |
1408 | ||
1409 | ||
5f5c8ee5 GM |
1410 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1411 | pointer has been lost, e.g. by using a structure assignment between | |
1412 | rows, at least one pointer must occur more than once in the rows of | |
1413 | MATRIX. */ | |
1414 | ||
1415 | void | |
59fc5cf9 | 1416 | check_matrix_pointer_lossage (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
1417 | { |
1418 | int i, j; | |
177c0ea7 | 1419 | |
5f5c8ee5 GM |
1420 | for (i = 0; i < matrix->nrows; ++i) |
1421 | for (j = 0; j < matrix->nrows; ++j) | |
a54e2c05 | 1422 | eassert (i == j |
5f5c8ee5 GM |
1423 | || (matrix->rows[i].glyphs[TEXT_AREA] |
1424 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1425 | } | |
1426 | ||
1427 | ||
1428 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1429 | ||
1430 | struct glyph_row * | |
59fc5cf9 | 1431 | matrix_row (struct glyph_matrix *matrix, int row) |
5f5c8ee5 | 1432 | { |
a54e2c05 DA |
1433 | eassert (matrix && matrix->rows); |
1434 | eassert (row >= 0 && row < matrix->nrows); | |
5f5c8ee5 GM |
1435 | |
1436 | /* That's really too slow for normal testing because this function | |
1437 | is called almost everywhere. Although---it's still astonishingly | |
1438 | fast, so it is valuable to have for debugging purposes. */ | |
1439 | #if 0 | |
1440 | check_matrix_pointer_lossage (matrix); | |
1441 | #endif | |
177c0ea7 | 1442 | |
5f5c8ee5 GM |
1443 | return matrix->rows + row; |
1444 | } | |
1445 | ||
1446 | ||
1447 | #if 0 /* This function makes invalid assumptions when text is | |
1448 | partially invisible. But it might come handy for debugging | |
1449 | nevertheless. */ | |
1450 | ||
1451 | /* Check invariants that must hold for an up to date current matrix of | |
1452 | window W. */ | |
1453 | ||
1454 | static void | |
59fc5cf9 | 1455 | check_matrix_invariants (struct window *w) |
5f5c8ee5 GM |
1456 | { |
1457 | struct glyph_matrix *matrix = w->current_matrix; | |
1458 | int yb = window_text_bottom_y (w); | |
1459 | struct glyph_row *row = matrix->rows; | |
1460 | struct glyph_row *last_text_row = NULL; | |
1461 | struct buffer *saved = current_buffer; | |
e74aeda8 | 1462 | struct buffer *buffer = XBUFFER (w->contents); |
5f5c8ee5 | 1463 | int c; |
177c0ea7 | 1464 | |
5f5c8ee5 GM |
1465 | /* This can sometimes happen for a fresh window. */ |
1466 | if (matrix->nrows < 2) | |
1467 | return; | |
1468 | ||
1469 | set_buffer_temp (buffer); | |
1470 | ||
1471 | /* Note: last row is always reserved for the mode line. */ | |
1472 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1473 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1474 | { | |
1475 | struct glyph_row *next = row + 1; | |
1476 | ||
1477 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1478 | last_text_row = row; | |
1479 | ||
1480 | /* Check that character and byte positions are in sync. */ | |
a54e2c05 | 1481 | eassert (MATRIX_ROW_START_BYTEPOS (row) |
5f5c8ee5 | 1482 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); |
a54e2c05 | 1483 | eassert (BYTEPOS (row->start.pos) |
d36fe237 | 1484 | == CHAR_TO_BYTE (CHARPOS (row->start.pos))); |
5f5c8ee5 GM |
1485 | |
1486 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1487 | have such a position temporarily in case of a minibuffer | |
1488 | displaying something like `[Sole completion]' at its end. */ | |
1489 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
d36fe237 | 1490 | { |
a54e2c05 | 1491 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
d36fe237 | 1492 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); |
a54e2c05 | 1493 | eassert (BYTEPOS (row->end.pos) |
d36fe237 EZ |
1494 | == CHAR_TO_BYTE (CHARPOS (row->end.pos))); |
1495 | } | |
5f5c8ee5 GM |
1496 | |
1497 | /* Check that end position of `row' is equal to start position | |
1498 | of next row. */ | |
1499 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1500 | { | |
a54e2c05 | 1501 | eassert (MATRIX_ROW_END_CHARPOS (row) |
5f5c8ee5 | 1502 | == MATRIX_ROW_START_CHARPOS (next)); |
a54e2c05 | 1503 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
5f5c8ee5 | 1504 | == MATRIX_ROW_START_BYTEPOS (next)); |
a54e2c05 DA |
1505 | eassert (CHARPOS (row->end.pos) == CHARPOS (next->start.pos)); |
1506 | eassert (BYTEPOS (row->end.pos) == BYTEPOS (next->start.pos)); | |
5f5c8ee5 GM |
1507 | } |
1508 | row = next; | |
1509 | } | |
1510 | ||
a54e2c05 DA |
1511 | eassert (w->current_matrix->nrows == w->desired_matrix->nrows); |
1512 | eassert (w->desired_matrix->rows != NULL); | |
5f5c8ee5 GM |
1513 | set_buffer_temp (saved); |
1514 | } | |
1515 | ||
1516 | #endif /* 0 */ | |
1517 | ||
e509cfa6 | 1518 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
1519 | |
1520 | ||
1521 | \f | |
1522 | /********************************************************************** | |
1523 | Allocating/ Adjusting Glyph Matrices | |
1524 | **********************************************************************/ | |
1525 | ||
1526 | /* Allocate glyph matrices over a window tree for a frame-based | |
1527 | redisplay | |
1528 | ||
1529 | X and Y are column/row within the frame glyph matrix where | |
1530 | sub-matrices for the window tree rooted at WINDOW must be | |
59ea14cd | 1531 | allocated. DIM_ONLY_P means that the caller of this |
8ce2650d YM |
1532 | function is only interested in the result matrix dimension, and |
1533 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1534 | |
1535 | The function returns the total width/height of the sub-matrices of | |
1536 | the window tree. If called on a frame root window, the computation | |
1537 | will take the mini-buffer window into account. | |
1538 | ||
1539 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1540 | ||
1541 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1542 | glyph matrices yet, and | |
1543 | ||
1544 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1545 | any window in the tree will be changed or have been changed (see | |
153a073c | 1546 | DIM_ONLY_P) |
5f5c8ee5 GM |
1547 | |
1548 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1549 | function. | |
1550 | ||
1551 | Windows are arranged into chains of windows on the same level | |
1552 | through the next fields of window structures. Such a level can be | |
1553 | either a sequence of horizontally adjacent windows from left to | |
1554 | right, or a sequence of vertically adjacent windows from top to | |
1555 | bottom. Each window in a horizontal sequence can be either a leaf | |
1556 | window or a vertical sequence; a window in a vertical sequence can | |
1557 | be either a leaf or a horizontal sequence. All windows in a | |
1558 | horizontal sequence have the same height, and all windows in a | |
1559 | vertical sequence have the same width. | |
1560 | ||
1561 | This function uses, for historical reasons, a more general | |
1562 | algorithm to determine glyph matrix dimensions that would be | |
1563 | necessary. | |
1564 | ||
1565 | The matrix height of a horizontal sequence is determined by the | |
1566 | maximum height of any matrix in the sequence. The matrix width of | |
1567 | a horizontal sequence is computed by adding up matrix widths of | |
1568 | windows in the sequence. | |
1569 | ||
1570 | |<------- result width ------->| | |
1571 | +---------+----------+---------+ --- | |
1572 | | | | | | | |
1573 | | | | | | |
1574 | +---------+ | | result height | |
1575 | | +---------+ | |
1576 | | | | | |
1577 | +----------+ --- | |
1578 | ||
1579 | The matrix width of a vertical sequence is the maximum matrix width | |
1580 | of any window in the sequence. Its height is computed by adding up | |
1581 | matrix heights of windows in the sequence. | |
1582 | ||
1583 | |<---- result width -->| | |
1584 | +---------+ --- | |
1585 | | | | | |
1586 | | | | | |
1587 | +---------+--+ | | |
1588 | | | | | |
1589 | | | result height | |
1590 | | | | |
1591 | +------------+---------+ | | |
1592 | | | | | |
1593 | | | | | |
1594 | +------------+---------+ --- */ | |
1595 | ||
1596 | /* Bit indicating that a new matrix will be allocated or has been | |
1597 | allocated. */ | |
1598 | ||
1599 | #define NEW_LEAF_MATRIX (1 << 0) | |
1600 | ||
1601 | /* Bit indicating that a matrix will or has changed its location or | |
1602 | size. */ | |
1603 | ||
1604 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1605 | ||
1606 | static struct dim | |
6f704c76 | 1607 | allocate_matrices_for_frame_redisplay (Lisp_Object window, int x, int y, |
59ea14cd | 1608 | bool dim_only_p, int *window_change_flags) |
5f5c8ee5 GM |
1609 | { |
1610 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1611 | int x0 = x, y0 = y; | |
1612 | int wmax = 0, hmax = 0; | |
1613 | struct dim total; | |
1614 | struct dim dim; | |
1615 | struct window *w; | |
59ea14cd | 1616 | bool in_horz_combination_p; |
5f5c8ee5 GM |
1617 | |
1618 | /* What combination is WINDOW part of? Compute this once since the | |
1619 | result is the same for all windows in the `next' chain. The | |
1620 | special case of a root window (parent equal to nil) is treated | |
1621 | like a vertical combination because a root window's `next' | |
1622 | points to the mini-buffer window, if any, which is arranged | |
1623 | vertically below other windows. */ | |
1624 | in_horz_combination_p | |
1625 | = (!NILP (XWINDOW (window)->parent) | |
e74aeda8 | 1626 | && WINDOW_HORIZONTAL_COMBINATION_P (XWINDOW (XWINDOW (window)->parent))); |
5f5c8ee5 GM |
1627 | |
1628 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1629 | do |
5f5c8ee5 GM |
1630 | { |
1631 | w = XWINDOW (window); | |
1632 | ||
1633 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1634 | on whether this is a combination or a leaf window. */ |
e74aeda8 DA |
1635 | if (WINDOWP (w->contents)) |
1636 | dim = allocate_matrices_for_frame_redisplay (w->contents, x, y, | |
5f5c8ee5 GM |
1637 | dim_only_p, |
1638 | window_change_flags); | |
1639 | else | |
1640 | { | |
1641 | /* If not already done, allocate sub-matrix structures. */ | |
1642 | if (w->desired_matrix == NULL) | |
1643 | { | |
1644 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1645 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1646 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1647 | } | |
177c0ea7 | 1648 | |
5f5c8ee5 GM |
1649 | /* Width and height MUST be chosen so that there are no |
1650 | holes in the frame matrix. */ | |
5d3cc43c GM |
1651 | dim.width = required_matrix_width (w); |
1652 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1653 | |
1654 | /* Will matrix be re-allocated? */ | |
1655 | if (x != w->desired_matrix->matrix_x | |
1656 | || y != w->desired_matrix->matrix_y | |
1657 | || dim.width != w->desired_matrix->matrix_w | |
1658 | || dim.height != w->desired_matrix->matrix_h | |
1659 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1660 | w->left_margin_cols) |
5f5c8ee5 GM |
1661 | != w->desired_matrix->left_margin_glyphs) |
1662 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1663 | w->right_margin_cols) |
5f5c8ee5 GM |
1664 | != w->desired_matrix->right_margin_glyphs)) |
1665 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1666 | ||
1667 | /* Actually change matrices, if allowed. Do not consider | |
1668 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1669 | may have been changed which we don't now here. We trust | |
59ea14cd | 1670 | that we only will be called with DIM_ONLY_P when |
5f5c8ee5 GM |
1671 | necessary. */ |
1672 | if (!dim_only_p) | |
1673 | { | |
1674 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1675 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1676 | } | |
1677 | } | |
1678 | ||
1679 | /* If we are part of a horizontal combination, advance x for | |
1680 | windows to the right of W; otherwise advance y for windows | |
1681 | below W. */ | |
1682 | if (in_horz_combination_p) | |
1683 | x += dim.width; | |
177c0ea7 | 1684 | else |
5f5c8ee5 GM |
1685 | y += dim.height; |
1686 | ||
1687 | /* Remember maximum glyph matrix dimensions. */ | |
1688 | wmax = max (wmax, dim.width); | |
1689 | hmax = max (hmax, dim.height); | |
1690 | ||
1691 | /* Next window on same level. */ | |
1692 | window = w->next; | |
1693 | } | |
1694 | while (!NILP (window)); | |
1695 | ||
1696 | /* Set `total' to the total glyph matrix dimension of this window | |
1697 | level. In a vertical combination, the width is the width of the | |
1698 | widest window; the height is the y we finally reached, corrected | |
1699 | by the y we started with. In a horizontal combination, the total | |
1700 | height is the height of the tallest window, and the width is the | |
1701 | x we finally reached, corrected by the x we started with. */ | |
1702 | if (in_horz_combination_p) | |
1703 | { | |
1704 | total.width = x - x0; | |
1705 | total.height = hmax; | |
1706 | } | |
177c0ea7 | 1707 | else |
5f5c8ee5 GM |
1708 | { |
1709 | total.width = wmax; | |
1710 | total.height = y - y0; | |
1711 | } | |
1712 | ||
1713 | return total; | |
1714 | } | |
1715 | ||
1716 | ||
5d3cc43c GM |
1717 | /* Return the required height of glyph matrices for window W. */ |
1718 | ||
2f7c71a1 | 1719 | static int |
971de7fb | 1720 | required_matrix_height (struct window *w) |
5d3cc43c GM |
1721 | { |
1722 | #ifdef HAVE_WINDOW_SYSTEM | |
1723 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 1724 | |
5d3cc43c GM |
1725 | if (FRAME_WINDOW_P (f)) |
1726 | { | |
1727 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1ea40aa2 | 1728 | int window_pixel_height = window_box_height (w) + eabs (w->vscroll); |
5d3cc43c | 1729 | return (((window_pixel_height + ch_height - 1) |
cc834cf9 | 1730 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
1731 | /* One partially visible line at the top and |
1732 | bottom of the window. */ | |
1733 | + 2 | |
153a073c | 1734 | /* 2 for header and mode line. */ |
5d3cc43c GM |
1735 | + 2); |
1736 | } | |
1737 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 1738 | |
7df02016 | 1739 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
1740 | } |
1741 | ||
1742 | ||
1743 | /* Return the required width of glyph matrices for window W. */ | |
1744 | ||
2f7c71a1 | 1745 | static int |
971de7fb | 1746 | required_matrix_width (struct window *w) |
5d3cc43c GM |
1747 | { |
1748 | #ifdef HAVE_WINDOW_SYSTEM | |
1749 | struct frame *f = XFRAME (w->frame); | |
1750 | if (FRAME_WINDOW_P (f)) | |
1751 | { | |
1752 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 1753 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 1754 | |
5d3cc43c GM |
1755 | /* Compute number of glyphs needed in a glyph row. */ |
1756 | return (((window_pixel_width + ch_width - 1) | |
cc834cf9 | 1757 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
1758 | /* 2 partially visible columns in the text area. */ |
1759 | + 2 | |
1760 | /* One partially visible column at the right | |
1761 | edge of each marginal area. */ | |
1762 | + 1 + 1); | |
1763 | } | |
1764 | #endif /* HAVE_WINDOW_SYSTEM */ | |
1765 | ||
5f24fa51 | 1766 | return w->total_cols; |
5d3cc43c GM |
1767 | } |
1768 | ||
1769 | ||
5f5c8ee5 | 1770 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 1771 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 1772 | |
5f5c8ee5 | 1773 | static void |
971de7fb | 1774 | allocate_matrices_for_window_redisplay (struct window *w) |
5f5c8ee5 | 1775 | { |
5f5c8ee5 GM |
1776 | while (w) |
1777 | { | |
e74aeda8 DA |
1778 | if (WINDOWP (w->contents)) |
1779 | allocate_matrices_for_window_redisplay (XWINDOW (w->contents)); | |
5f5c8ee5 GM |
1780 | else |
1781 | { | |
1782 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
1783 | struct dim dim; |
1784 | ||
1785 | /* If matrices are not yet allocated, allocate them now. */ | |
1786 | if (w->desired_matrix == NULL) | |
1787 | { | |
1788 | w->desired_matrix = new_glyph_matrix (NULL); | |
1789 | w->current_matrix = new_glyph_matrix (NULL); | |
1790 | } | |
1791 | ||
5d3cc43c GM |
1792 | dim.width = required_matrix_width (w); |
1793 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1794 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
1795 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
1796 | } | |
177c0ea7 | 1797 | |
5f5c8ee5 GM |
1798 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
1799 | } | |
1800 | } | |
1801 | ||
1802 | ||
1803 | /* Re-allocate/ re-compute glyph matrices on frame F. If F is null, | |
1804 | do it for all frames; otherwise do it just for the given frame. | |
1805 | This function must be called when a new frame is created, its size | |
1806 | changes, or its window configuration changes. */ | |
1807 | ||
1808 | void | |
971de7fb | 1809 | adjust_glyphs (struct frame *f) |
5f5c8ee5 | 1810 | { |
408f5064 GM |
1811 | /* Block input so that expose events and other events that access |
1812 | glyph matrices are not processed while we are changing them. */ | |
4d7e6e51 | 1813 | block_input (); |
408f5064 | 1814 | |
5f5c8ee5 GM |
1815 | if (f) |
1816 | adjust_frame_glyphs (f); | |
1817 | else | |
1818 | { | |
1819 | Lisp_Object tail, lisp_frame; | |
177c0ea7 | 1820 | |
5f5c8ee5 GM |
1821 | FOR_EACH_FRAME (tail, lisp_frame) |
1822 | adjust_frame_glyphs (XFRAME (lisp_frame)); | |
1823 | } | |
408f5064 | 1824 | |
4d7e6e51 | 1825 | unblock_input (); |
5f5c8ee5 | 1826 | } |
177c0ea7 | 1827 | |
5f5c8ee5 GM |
1828 | /* Allocate/reallocate glyph matrices of a single frame F. */ |
1829 | ||
1830 | static void | |
971de7fb | 1831 | adjust_frame_glyphs (struct frame *f) |
5f5c8ee5 GM |
1832 | { |
1833 | if (FRAME_WINDOW_P (f)) | |
1834 | adjust_frame_glyphs_for_window_redisplay (f); | |
1835 | else | |
1836 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 1837 | |
b09cca6a | 1838 | /* Don't forget the buffer for decode_mode_spec. */ |
5f5c8ee5 GM |
1839 | adjust_decode_mode_spec_buffer (f); |
1840 | ||
1841 | f->glyphs_initialized_p = 1; | |
1842 | } | |
1843 | ||
59ea14cd | 1844 | /* Return true if any window in the tree has nonzero window margins. See |
075757cc | 1845 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ |
59ea14cd | 1846 | static bool |
971de7fb | 1847 | showing_window_margins_p (struct window *w) |
075757cc CY |
1848 | { |
1849 | while (w) | |
1850 | { | |
e74aeda8 | 1851 | if (WINDOWP (w->contents)) |
075757cc | 1852 | { |
e74aeda8 | 1853 | if (showing_window_margins_p (XWINDOW (w->contents))) |
075757cc CY |
1854 | return 1; |
1855 | } | |
eeaf9bf3 | 1856 | else if (w->left_margin_cols > 0 || w->right_margin_cols > 0) |
075757cc | 1857 | return 1; |
3fc809e2 | 1858 | |
075757cc CY |
1859 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
1860 | } | |
1861 | return 0; | |
1862 | } | |
1863 | ||
5f5c8ee5 | 1864 | |
c9f00270 GM |
1865 | /* In the window tree with root W, build current matrices of leaf |
1866 | windows from the frame's current matrix. */ | |
1867 | ||
1868 | static void | |
971de7fb | 1869 | fake_current_matrices (Lisp_Object window) |
c9f00270 GM |
1870 | { |
1871 | struct window *w; | |
177c0ea7 | 1872 | |
c9f00270 GM |
1873 | for (; !NILP (window); window = w->next) |
1874 | { | |
1875 | w = XWINDOW (window); | |
177c0ea7 | 1876 | |
e74aeda8 DA |
1877 | if (WINDOWP (w->contents)) |
1878 | fake_current_matrices (w->contents); | |
c9f00270 GM |
1879 | else |
1880 | { | |
1881 | int i; | |
1882 | struct frame *f = XFRAME (w->frame); | |
1883 | struct glyph_matrix *m = w->current_matrix; | |
1884 | struct glyph_matrix *fm = f->current_matrix; | |
1885 | ||
a54e2c05 DA |
1886 | eassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
1887 | eassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 1888 | |
c9f00270 GM |
1889 | for (i = 0; i < m->matrix_h; ++i) |
1890 | { | |
1891 | struct glyph_row *r = m->rows + i; | |
7df02016 | 1892 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 | 1893 | |
a54e2c05 | 1894 | eassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] |
c9f00270 GM |
1895 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); |
1896 | ||
1897 | r->enabled_p = fr->enabled_p; | |
1898 | if (r->enabled_p) | |
1899 | { | |
1900 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
1901 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
1902 | r->used[TEXT_AREA] = (m->matrix_w | |
1903 | - r->used[LEFT_MARGIN_AREA] | |
1904 | - r->used[RIGHT_MARGIN_AREA]); | |
1905 | r->mode_line_p = 0; | |
c9f00270 GM |
1906 | } |
1907 | } | |
1908 | } | |
1909 | } | |
1910 | } | |
1911 | ||
1912 | ||
bccee4f2 | 1913 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 1914 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 1915 | |
141f1ff7 | 1916 | struct glyph_matrix * |
971de7fb | 1917 | save_current_matrix (struct frame *f) |
c9f00270 | 1918 | { |
bccee4f2 | 1919 | int i; |
38182d90 | 1920 | struct glyph_matrix *saved = xzalloc (sizeof *saved); |
bccee4f2 | 1921 | saved->nrows = f->current_matrix->nrows; |
23f86fce | 1922 | saved->rows = xzalloc (saved->nrows * sizeof *saved->rows); |
bccee4f2 GM |
1923 | |
1924 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 1925 | { |
bccee4f2 GM |
1926 | struct glyph_row *from = f->current_matrix->rows + i; |
1927 | struct glyph_row *to = saved->rows + i; | |
dfd153ae | 1928 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
141f1ff7 | 1929 | |
23f86fce | 1930 | to->glyphs[TEXT_AREA] = xmalloc (nbytes); |
72af86bd | 1931 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
bccee4f2 | 1932 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
141f1ff7 EZ |
1933 | if (from->used[LEFT_MARGIN_AREA]) |
1934 | { | |
1935 | nbytes = from->used[LEFT_MARGIN_AREA] * sizeof (struct glyph); | |
1936 | to->glyphs[LEFT_MARGIN_AREA] = (struct glyph *) xmalloc (nbytes); | |
1937 | memcpy (to->glyphs[LEFT_MARGIN_AREA], | |
1938 | from->glyphs[LEFT_MARGIN_AREA], nbytes); | |
1939 | to->used[LEFT_MARGIN_AREA] = from->used[LEFT_MARGIN_AREA]; | |
1940 | } | |
1941 | if (from->used[RIGHT_MARGIN_AREA]) | |
1942 | { | |
1943 | nbytes = from->used[RIGHT_MARGIN_AREA] * sizeof (struct glyph); | |
1944 | to->glyphs[RIGHT_MARGIN_AREA] = (struct glyph *) xmalloc (nbytes); | |
1945 | memcpy (to->glyphs[RIGHT_MARGIN_AREA], | |
1946 | from->glyphs[RIGHT_MARGIN_AREA], nbytes); | |
1947 | to->used[RIGHT_MARGIN_AREA] = from->used[RIGHT_MARGIN_AREA]; | |
1948 | } | |
e797dea6 | 1949 | } |
bccee4f2 GM |
1950 | |
1951 | return saved; | |
1952 | } | |
1953 | ||
1954 | ||
1955 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
1956 | and free memory associated with SAVED. */ | |
1957 | ||
1958 | static void | |
971de7fb | 1959 | restore_current_matrix (struct frame *f, struct glyph_matrix *saved) |
bccee4f2 GM |
1960 | { |
1961 | int i; | |
1962 | ||
1963 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 1964 | { |
bccee4f2 GM |
1965 | struct glyph_row *from = saved->rows + i; |
1966 | struct glyph_row *to = f->current_matrix->rows + i; | |
dfd153ae | 1967 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
141f1ff7 | 1968 | |
72af86bd | 1969 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
e797dea6 | 1970 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
bccee4f2 | 1971 | xfree (from->glyphs[TEXT_AREA]); |
141f1ff7 EZ |
1972 | nbytes = from->used[LEFT_MARGIN_AREA]; |
1973 | if (nbytes) | |
1974 | { | |
1975 | memcpy (to->glyphs[LEFT_MARGIN_AREA], | |
1976 | from->glyphs[LEFT_MARGIN_AREA], nbytes); | |
1977 | to->used[LEFT_MARGIN_AREA] = from->used[LEFT_MARGIN_AREA]; | |
1978 | xfree (from->glyphs[LEFT_MARGIN_AREA]); | |
1979 | } | |
1980 | else | |
1981 | to->used[LEFT_MARGIN_AREA] = 0; | |
1982 | nbytes = from->used[RIGHT_MARGIN_AREA]; | |
1983 | if (nbytes) | |
1984 | { | |
1985 | memcpy (to->glyphs[RIGHT_MARGIN_AREA], | |
1986 | from->glyphs[RIGHT_MARGIN_AREA], nbytes); | |
1987 | to->used[RIGHT_MARGIN_AREA] = from->used[RIGHT_MARGIN_AREA]; | |
1988 | xfree (from->glyphs[RIGHT_MARGIN_AREA]); | |
1989 | } | |
1990 | else | |
1991 | to->used[RIGHT_MARGIN_AREA] = 0; | |
e797dea6 | 1992 | } |
177c0ea7 | 1993 | |
bccee4f2 GM |
1994 | xfree (saved->rows); |
1995 | xfree (saved); | |
c9f00270 GM |
1996 | } |
1997 | ||
1998 | ||
bccee4f2 | 1999 | |
5f5c8ee5 GM |
2000 | /* Allocate/reallocate glyph matrices of a single frame F for |
2001 | frame-based redisplay. */ | |
2002 | ||
2003 | static void | |
971de7fb | 2004 | adjust_frame_glyphs_for_frame_redisplay (struct frame *f) |
5f5c8ee5 | 2005 | { |
5f5c8ee5 | 2006 | struct dim matrix_dim; |
59ea14cd | 2007 | bool pool_changed_p; |
5f5c8ee5 GM |
2008 | int window_change_flags; |
2009 | int top_window_y; | |
2010 | ||
2011 | if (!FRAME_LIVE_P (f)) | |
2012 | return; | |
2013 | ||
5f5c8ee5 GM |
2014 | top_window_y = FRAME_TOP_MARGIN (f); |
2015 | ||
2016 | /* Allocate glyph pool structures if not already done. */ | |
2017 | if (f->desired_pool == NULL) | |
2018 | { | |
2019 | f->desired_pool = new_glyph_pool (); | |
2020 | f->current_pool = new_glyph_pool (); | |
2021 | } | |
2022 | ||
2023 | /* Allocate frames matrix structures if needed. */ | |
2024 | if (f->desired_matrix == NULL) | |
2025 | { | |
2026 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
2027 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
2028 | } | |
177c0ea7 | 2029 | |
5f5c8ee5 GM |
2030 | /* Compute window glyph matrices. (This takes the mini-buffer |
2031 | window into account). The result is the size of the frame glyph | |
2032 | matrix needed. The variable window_change_flags is set to a bit | |
2033 | mask indicating whether new matrices will be allocated or | |
2034 | existing matrices change their size or location within the frame | |
2035 | matrix. */ | |
2036 | window_change_flags = 0; | |
2037 | matrix_dim | |
2038 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
2039 | 0, top_window_y, | |
5d3cc43c | 2040 | 1, |
5f5c8ee5 GM |
2041 | &window_change_flags); |
2042 | ||
2043 | /* Add in menu bar lines, if any. */ | |
2044 | matrix_dim.height += top_window_y; | |
2045 | ||
2046 | /* Enlarge pools as necessary. */ | |
2047 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
2048 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
2049 | ||
177c0ea7 | 2050 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
2051 | absolutely necessary since it requires a frame redraw. */ |
2052 | if (pool_changed_p || window_change_flags) | |
2053 | { | |
2054 | /* Do it for window matrices. */ | |
2055 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 2056 | 0, top_window_y, 0, |
5f5c8ee5 GM |
2057 | &window_change_flags); |
2058 | ||
2059 | /* Size of frame matrices must equal size of frame. Note | |
2060 | that we are called for X frames with window widths NOT equal | |
2061 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
a54e2c05 | 2062 | eassert (matrix_dim.width == FRAME_COLS (f) |
7df02016 | 2063 | && matrix_dim.height == FRAME_LINES (f)); |
177c0ea7 | 2064 | |
e797dea6 GM |
2065 | /* Pointers to glyph memory in glyph rows are exchanged during |
2066 | the update phase of redisplay, which means in general that a | |
2067 | frame's current matrix consists of pointers into both the | |
2068 | desired and current glyph pool of the frame. Adjusting a | |
2069 | matrix sets the frame matrix up so that pointers are all into | |
2070 | the same pool. If we want to preserve glyph contents of the | |
2071 | current matrix over a call to adjust_glyph_matrix, we must | |
2072 | make a copy of the current glyphs, and restore the current | |
2073 | matrix' contents from that copy. */ | |
2074 | if (display_completed | |
2075 | && !FRAME_GARBAGED_P (f) | |
2076 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
2077 | && matrix_dim.height == f->current_matrix->matrix_h |
2078 | /* For some reason, the frame glyph matrix gets corrupted if | |
2079 | any of the windows contain margins. I haven't been able | |
2080 | to hunt down the reason, but for the moment this prevents | |
2081 | the problem from manifesting. -- cyd */ | |
2082 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) | |
e797dea6 | 2083 | { |
bccee4f2 GM |
2084 | struct glyph_matrix *copy = save_current_matrix (f); |
2085 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2086 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2087 | restore_current_matrix (f, copy); |
e797dea6 GM |
2088 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2089 | } | |
c9f00270 | 2090 | else |
e797dea6 | 2091 | { |
bccee4f2 | 2092 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2093 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2094 | SET_FRAME_GARBAGED (f); | |
2095 | } | |
5f5c8ee5 GM |
2096 | } |
2097 | } | |
2098 | ||
2099 | ||
2100 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2101 | window-based redisplay. */ | |
2102 | ||
2103 | static void | |
971de7fb | 2104 | adjust_frame_glyphs_for_window_redisplay (struct frame *f) |
5f5c8ee5 | 2105 | { |
a54e2c05 | 2106 | eassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); |
177c0ea7 | 2107 | |
5f5c8ee5 | 2108 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2109 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2110 | |
8ce2650d | 2111 | #ifdef HAVE_X_WINDOWS |
5f5c8ee5 GM |
2112 | /* Allocate/ reallocate matrices of the dummy window used to display |
2113 | the menu bar under X when no X toolkit support is available. */ | |
488dd4c4 | 2114 | #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2115 | { |
2116 | /* Allocate a dummy window if not already done. */ | |
d2d37ddc | 2117 | struct window *w; |
5f5c8ee5 GM |
2118 | if (NILP (f->menu_bar_window)) |
2119 | { | |
077288cf | 2120 | Lisp_Object frame; |
f00af5b1 | 2121 | fset_menu_bar_window (f, make_window ()); |
5f5c8ee5 | 2122 | w = XWINDOW (f->menu_bar_window); |
077288cf | 2123 | XSETFRAME (frame, f); |
e8c17b81 | 2124 | wset_frame (w, frame); |
5f5c8ee5 GM |
2125 | w->pseudo_window_p = 1; |
2126 | } | |
2127 | else | |
2128 | w = XWINDOW (f->menu_bar_window); | |
2129 | ||
2130 | /* Set window dimensions to frame dimensions and allocate or | |
2131 | adjust glyph matrices of W. */ | |
5f24fa51 DA |
2132 | w->top_line = 0; |
2133 | w->left_col = 0; | |
2134 | w->total_lines = FRAME_MENU_BAR_LINES (f); | |
2135 | w->total_cols = FRAME_TOTAL_COLS (f); | |
5d3cc43c | 2136 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2137 | } |
57714a86 YM |
2138 | #endif /* not USE_X_TOOLKIT && not USE_GTK */ |
2139 | #endif /* HAVE_X_WINDOWS */ | |
5f5c8ee5 | 2140 | |
488dd4c4 | 2141 | #ifndef USE_GTK |
d2d37ddc PE |
2142 | { |
2143 | /* Allocate/ reallocate matrices of the tool bar window. If we | |
2144 | don't have a tool bar window yet, make one. */ | |
2145 | struct window *w; | |
2146 | if (NILP (f->tool_bar_window)) | |
2147 | { | |
077288cf | 2148 | Lisp_Object frame; |
f00af5b1 | 2149 | fset_tool_bar_window (f, make_window ()); |
d2d37ddc | 2150 | w = XWINDOW (f->tool_bar_window); |
077288cf | 2151 | XSETFRAME (frame, f); |
e8c17b81 | 2152 | wset_frame (w, frame); |
d2d37ddc PE |
2153 | w->pseudo_window_p = 1; |
2154 | } | |
2155 | else | |
9ea173e8 | 2156 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2157 | |
5f24fa51 DA |
2158 | w->top_line = FRAME_MENU_BAR_LINES (f); |
2159 | w->left_col = 0; | |
2160 | w->total_lines = FRAME_TOOL_BAR_LINES (f); | |
2161 | w->total_cols = FRAME_TOTAL_COLS (f); | |
d2d37ddc PE |
2162 | allocate_matrices_for_window_redisplay (w); |
2163 | } | |
488dd4c4 | 2164 | #endif |
5f5c8ee5 GM |
2165 | } |
2166 | ||
2167 | ||
5f5c8ee5 GM |
2168 | /* Re-allocate buffer for decode_mode_spec on frame F. */ |
2169 | ||
2170 | static void | |
971de7fb | 2171 | adjust_decode_mode_spec_buffer (struct frame *f) |
5f5c8ee5 | 2172 | { |
38182d90 PE |
2173 | f->decode_mode_spec_buffer = xrealloc (f->decode_mode_spec_buffer, |
2174 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
5f5c8ee5 GM |
2175 | } |
2176 | ||
2177 | ||
2178 | \f | |
2179 | /********************************************************************** | |
2180 | Freeing Glyph Matrices | |
2181 | **********************************************************************/ | |
2182 | ||
2183 | /* Free glyph memory for a frame F. F may be null. This function can | |
2184 | be called for the same frame more than once. The root window of | |
2185 | F may be nil when this function is called. This is the case when | |
2186 | the function is called when F is destroyed. */ | |
2187 | ||
2188 | void | |
971de7fb | 2189 | free_glyphs (struct frame *f) |
5f5c8ee5 GM |
2190 | { |
2191 | if (f && f->glyphs_initialized_p) | |
2192 | { | |
42f55fe0 GM |
2193 | /* Block interrupt input so that we don't get surprised by an X |
2194 | event while we're in an inconsistent state. */ | |
4d7e6e51 | 2195 | block_input (); |
5f5c8ee5 | 2196 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2197 | |
5f5c8ee5 GM |
2198 | /* Release window sub-matrices. */ |
2199 | if (!NILP (f->root_window)) | |
2200 | free_window_matrices (XWINDOW (f->root_window)); | |
2201 | ||
5a49b79c | 2202 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2203 | /* Free the dummy window for menu bars without X toolkit and its |
2204 | glyph matrices. */ | |
2205 | if (!NILP (f->menu_bar_window)) | |
2206 | { | |
2207 | struct window *w = XWINDOW (f->menu_bar_window); | |
2208 | free_glyph_matrix (w->desired_matrix); | |
2209 | free_glyph_matrix (w->current_matrix); | |
2210 | w->desired_matrix = w->current_matrix = NULL; | |
f00af5b1 | 2211 | fset_menu_bar_window (f, Qnil); |
5f5c8ee5 | 2212 | } |
5a49b79c | 2213 | #endif |
5f5c8ee5 | 2214 | |
9ea173e8 GM |
2215 | /* Free the tool bar window and its glyph matrices. */ |
2216 | if (!NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2217 | { |
9ea173e8 | 2218 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2219 | free_glyph_matrix (w->desired_matrix); |
2220 | free_glyph_matrix (w->current_matrix); | |
2221 | w->desired_matrix = w->current_matrix = NULL; | |
f00af5b1 | 2222 | fset_tool_bar_window (f, Qnil); |
5f5c8ee5 GM |
2223 | } |
2224 | ||
2225 | /* Release frame glyph matrices. Reset fields to zero in | |
2226 | case we are called a second time. */ | |
2227 | if (f->desired_matrix) | |
2228 | { | |
2229 | free_glyph_matrix (f->desired_matrix); | |
2230 | free_glyph_matrix (f->current_matrix); | |
2231 | f->desired_matrix = f->current_matrix = NULL; | |
2232 | } | |
2233 | ||
2234 | /* Release glyph pools. */ | |
2235 | if (f->desired_pool) | |
2236 | { | |
2237 | free_glyph_pool (f->desired_pool); | |
2238 | free_glyph_pool (f->current_pool); | |
2239 | f->desired_pool = f->current_pool = NULL; | |
2240 | } | |
177c0ea7 | 2241 | |
4d7e6e51 | 2242 | unblock_input (); |
5f5c8ee5 GM |
2243 | } |
2244 | } | |
2245 | ||
2246 | ||
2247 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2248 | function may be called with a null pointer, and it may be called on | |
2249 | the same tree more than once. */ | |
2250 | ||
2251 | void | |
971de7fb | 2252 | free_window_matrices (struct window *w) |
5f5c8ee5 GM |
2253 | { |
2254 | while (w) | |
2255 | { | |
e74aeda8 DA |
2256 | if (WINDOWP (w->contents)) |
2257 | free_window_matrices (XWINDOW (w->contents)); | |
177c0ea7 | 2258 | else |
5f5c8ee5 GM |
2259 | { |
2260 | /* This is a leaf window. Free its memory and reset fields | |
2261 | to zero in case this function is called a second time for | |
2262 | W. */ | |
2263 | free_glyph_matrix (w->current_matrix); | |
2264 | free_glyph_matrix (w->desired_matrix); | |
2265 | w->current_matrix = w->desired_matrix = NULL; | |
2266 | } | |
2267 | ||
2268 | /* Next window on same level. */ | |
2269 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2270 | } | |
2271 | } | |
2272 | ||
2273 | ||
2274 | /* Check glyph memory leaks. This function is called from | |
2275 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2276 | exits. We therefore free all glyph memory for all active frames | |
2277 | explicitly and check that nothing is left allocated. */ | |
2278 | ||
2279 | void | |
971de7fb | 2280 | check_glyph_memory (void) |
5f5c8ee5 GM |
2281 | { |
2282 | Lisp_Object tail, frame; | |
2283 | ||
2284 | /* Free glyph memory for all frames. */ | |
2285 | FOR_EACH_FRAME (tail, frame) | |
2286 | free_glyphs (XFRAME (frame)); | |
2287 | ||
f0b79313 | 2288 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
5f5c8ee5 | 2289 | /* Check that nothing is left allocated. */ |
f0b79313 DA |
2290 | eassert (glyph_matrix_count == 0); |
2291 | eassert (glyph_pool_count == 0); | |
2292 | #endif | |
5f5c8ee5 GM |
2293 | } |
2294 | ||
2295 | ||
2296 | \f | |
2297 | /********************************************************************** | |
2298 | Building a Frame Matrix | |
2299 | **********************************************************************/ | |
2300 | ||
2301 | /* Most of the redisplay code works on glyph matrices attached to | |
2302 | windows. This is a good solution most of the time, but it is not | |
2303 | suitable for terminal code. Terminal output functions cannot rely | |
2304 | on being able to set an arbitrary terminal window. Instead they | |
2305 | must be provided with a view of the whole frame, i.e. the whole | |
2306 | screen. We build such a view by constructing a frame matrix from | |
2307 | window matrices in this section. | |
2308 | ||
65620264 | 2309 | Windows that must be updated have their must_be_updated_p flag set. |
5f5c8ee5 GM |
2310 | For all such windows, their desired matrix is made part of the |
2311 | desired frame matrix. For other windows, their current matrix is | |
2312 | made part of the desired frame matrix. | |
2313 | ||
2314 | +-----------------+----------------+ | |
2315 | | desired | desired | | |
2316 | | | | | |
2317 | +-----------------+----------------+ | |
2318 | | current | | |
2319 | | | | |
2320 | +----------------------------------+ | |
2321 | ||
2322 | Desired window matrices can be made part of the frame matrix in a | |
2323 | cheap way: We exploit the fact that the desired frame matrix and | |
2324 | desired window matrices share their glyph memory. This is not | |
2325 | possible for current window matrices. Their glyphs are copied to | |
2326 | the desired frame matrix. The latter is equivalent to | |
2327 | preserve_other_columns in the old redisplay. | |
2328 | ||
2329 | Used glyphs counters for frame matrix rows are the result of adding | |
2330 | up glyph lengths of the window matrices. A line in the frame | |
2331 | matrix is enabled, if a corresponding line in a window matrix is | |
2332 | enabled. | |
177c0ea7 | 2333 | |
5f5c8ee5 GM |
2334 | After building the desired frame matrix, it will be passed to |
2335 | terminal code, which will manipulate both the desired and current | |
2336 | frame matrix. Changes applied to the frame's current matrix have | |
2337 | to be visible in current window matrices afterwards, of course. | |
2338 | ||
2339 | This problem is solved like this: | |
2340 | ||
2341 | 1. Window and frame matrices share glyphs. Window matrices are | |
2342 | constructed in a way that their glyph contents ARE the glyph | |
2343 | contents needed in a frame matrix. Thus, any modification of | |
2344 | glyphs done in terminal code will be reflected in window matrices | |
2345 | automatically. | |
177c0ea7 | 2346 | |
5f5c8ee5 GM |
2347 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2348 | intercepted by hook functions so that corresponding row operations | |
2349 | on window matrices can be performed. This is necessary because we | |
2350 | use pointers to glyphs in glyph row structures. To satisfy the | |
2351 | assumption of point 1 above that glyphs are updated implicitly in | |
2352 | window matrices when they are manipulated via the frame matrix, | |
2353 | window and frame matrix must of course agree where to find the | |
2354 | glyphs for their rows. Possible manipulations that must be | |
2355 | mirrored are assignments of rows of the desired frame matrix to the | |
2356 | current frame matrix and scrolling the current frame matrix. */ | |
2357 | ||
2358 | /* Build frame F's desired matrix from window matrices. Only windows | |
2359 | which have the flag must_be_updated_p set have to be updated. Menu | |
2360 | bar lines of a frame are not covered by window matrices, so make | |
2361 | sure not to touch them in this function. */ | |
2362 | ||
2363 | static void | |
971de7fb | 2364 | build_frame_matrix (struct frame *f) |
5f5c8ee5 GM |
2365 | { |
2366 | int i; | |
2367 | ||
2368 | /* F must have a frame matrix when this function is called. */ | |
a54e2c05 | 2369 | eassert (!FRAME_WINDOW_P (f)); |
177c0ea7 | 2370 | |
5f5c8ee5 GM |
2371 | /* Clear all rows in the frame matrix covered by window matrices. |
2372 | Menu bar lines are not covered by windows. */ | |
2373 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2374 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2375 | ||
2376 | /* Build the matrix by walking the window tree. */ | |
2377 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2378 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2379 | } | |
2380 | ||
2381 | ||
2382 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2383 | matrices. W is the root of a window tree. */ | |
2384 | ||
2385 | static void | |
971de7fb | 2386 | build_frame_matrix_from_window_tree (struct glyph_matrix *matrix, struct window *w) |
5f5c8ee5 GM |
2387 | { |
2388 | while (w) | |
2389 | { | |
e74aeda8 DA |
2390 | if (WINDOWP (w->contents)) |
2391 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->contents)); | |
5f5c8ee5 GM |
2392 | else |
2393 | build_frame_matrix_from_leaf_window (matrix, w); | |
2394 | ||
2395 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2396 | } | |
2397 | } | |
2398 | ||
2399 | ||
2400 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2401 | desired frame matrix built. W is a leaf window whose desired or | |
2402 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2403 | must_be_updated_p determines which matrix it contributes to | |
59ea14cd | 2404 | FRAME_MATRIX. If W->must_be_updated_p, W's desired matrix |
5f5c8ee5 GM |
2405 | is added to FRAME_MATRIX, otherwise W's current matrix is added. |
2406 | Adding a desired matrix means setting up used counters and such in | |
2407 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2408 | means copying glyphs. The latter case corresponds to | |
2409 | preserve_other_columns in the old redisplay. */ | |
2410 | ||
2411 | static void | |
971de7fb | 2412 | build_frame_matrix_from_leaf_window (struct glyph_matrix *frame_matrix, struct window *w) |
5f5c8ee5 GM |
2413 | { |
2414 | struct glyph_matrix *window_matrix; | |
2415 | int window_y, frame_y; | |
2416 | /* If non-zero, a glyph to insert at the right border of W. */ | |
3fc809e2 KS |
2417 | GLYPH right_border_glyph; |
2418 | ||
2419 | SET_GLYPH_FROM_CHAR (right_border_glyph, 0); | |
5f5c8ee5 GM |
2420 | |
2421 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2422 | if (w->must_be_updated_p) | |
2423 | { | |
2424 | window_matrix = w->desired_matrix; | |
2425 | ||
2426 | /* Decide whether we want to add a vertical border glyph. */ | |
2427 | if (!WINDOW_RIGHTMOST_P (w)) | |
2428 | { | |
2429 | struct Lisp_Char_Table *dp = window_display_table (w); | |
3fc809e2 | 2430 | Lisp_Object gc; |
b4e49aee | 2431 | |
3fc809e2 KS |
2432 | SET_GLYPH_FROM_CHAR (right_border_glyph, '|'); |
2433 | if (dp | |
d311d28c | 2434 | && (gc = DISP_BORDER_GLYPH (dp), GLYPH_CODE_P (gc))) |
3fc809e2 KS |
2435 | { |
2436 | SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph, gc); | |
2437 | spec_glyph_lookup_face (w, &right_border_glyph); | |
2438 | } | |
b4e49aee | 2439 | |
3fc809e2 KS |
2440 | if (GLYPH_FACE (right_border_glyph) <= 0) |
2441 | SET_GLYPH_FACE (right_border_glyph, VERTICAL_BORDER_FACE_ID); | |
5f5c8ee5 GM |
2442 | } |
2443 | } | |
2444 | else | |
2445 | window_matrix = w->current_matrix; | |
2446 | ||
2447 | /* For all rows in the window matrix and corresponding rows in the | |
2448 | frame matrix. */ | |
2449 | window_y = 0; | |
2450 | frame_y = window_matrix->matrix_y; | |
2451 | while (window_y < window_matrix->nrows) | |
2452 | { | |
2453 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2454 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
59ea14cd | 2455 | bool current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2456 | |
2457 | /* Fill up the frame row with spaces up to the left margin of the | |
2458 | window row. */ | |
2459 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2460 | ||
2461 | /* Fill up areas in the window matrix row with spaces. */ | |
2462 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2463 | |
2464 | /* If only part of W's desired matrix has been built, and | |
2465 | window_row wasn't displayed, use the corresponding current | |
2466 | row instead. */ | |
2467 | if (window_matrix == w->desired_matrix | |
2468 | && !window_row->enabled_p) | |
2469 | { | |
2470 | window_row = w->current_matrix->rows + window_y; | |
2471 | current_row_p = 1; | |
2472 | } | |
177c0ea7 | 2473 | |
2a8bd25f | 2474 | if (current_row_p) |
5f5c8ee5 | 2475 | { |
2a8bd25f | 2476 | /* Copy window row to frame row. */ |
72af86bd AS |
2477 | memcpy (frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, |
2478 | window_row->glyphs[0], | |
2479 | window_matrix->matrix_w * sizeof (struct glyph)); | |
5f5c8ee5 GM |
2480 | } |
2481 | else | |
2482 | { | |
a54e2c05 | 2483 | eassert (window_row->enabled_p); |
177c0ea7 | 2484 | |
2a8bd25f GM |
2485 | /* Only when a desired row has been displayed, we want |
2486 | the corresponding frame row to be updated. */ | |
2487 | frame_row->enabled_p = 1; | |
177c0ea7 | 2488 | |
5f5c8ee5 GM |
2489 | /* Maybe insert a vertical border between horizontally adjacent |
2490 | windows. */ | |
3fc809e2 | 2491 | if (GLYPH_CHAR (right_border_glyph) != 0) |
5f5c8ee5 GM |
2492 | { |
2493 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2494 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2495 | } | |
2496 | ||
e509cfa6 | 2497 | #ifdef GLYPH_DEBUG |
a13396c9 GM |
2498 | /* Window row window_y must be a slice of frame row |
2499 | frame_y. */ | |
a54e2c05 | 2500 | eassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2501 | |
5f5c8ee5 GM |
2502 | /* If rows are in sync, we don't have to copy glyphs because |
2503 | frame and window share glyphs. */ | |
177c0ea7 | 2504 | |
a38634ff | 2505 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2506 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2507 | #endif |
5f5c8ee5 GM |
2508 | } |
2509 | ||
2510 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2511 | up with spaces, and visit leaf windows from left to right it | |
2512 | can be done simply. */ | |
177c0ea7 | 2513 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2514 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2515 | ||
5f5c8ee5 GM |
2516 | /* Next row. */ |
2517 | ++window_y; | |
2518 | ++frame_y; | |
2519 | } | |
2520 | } | |
2521 | ||
5f81871e RS |
2522 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2523 | ID, return a glyph that has a realized face ID. | |
2524 | This is used for glyphs displayed specially and not part of the text; | |
2525 | for instance, vertical separators, truncation markers, etc. */ | |
2526 | ||
3fc809e2 | 2527 | void |
971de7fb | 2528 | spec_glyph_lookup_face (struct window *w, GLYPH *glyph) |
5f81871e | 2529 | { |
3fc809e2 | 2530 | int lface_id = GLYPH_FACE (*glyph); |
5f81871e RS |
2531 | /* Convert the glyph's specified face to a realized (cache) face. */ |
2532 | if (lface_id > 0) | |
2533 | { | |
2534 | int face_id = merge_faces (XFRAME (w->frame), | |
2535 | Qt, lface_id, DEFAULT_FACE_ID); | |
3fc809e2 | 2536 | SET_GLYPH_FACE (*glyph, face_id); |
5f81871e | 2537 | } |
5f81871e | 2538 | } |
5f5c8ee5 GM |
2539 | |
2540 | /* Add spaces to a glyph row ROW in a window matrix. | |
2541 | ||
2542 | Each row has the form: | |
2543 | ||
2544 | +---------+-----------------------------+------------+ | |
2545 | | left | text | right | | |
2546 | +---------+-----------------------------+------------+ | |
2547 | ||
2548 | Left and right marginal areas are optional. This function adds | |
2549 | spaces to areas so that there are no empty holes between areas. | |
2550 | In other words: If the right area is not empty, the text area | |
2551 | is filled up with spaces up to the right area. If the text area | |
2552 | is not empty, the left area is filled up. | |
2553 | ||
2554 | To be called for frame-based redisplay, only. */ | |
2555 | ||
2556 | static void | |
971de7fb | 2557 | fill_up_glyph_row_with_spaces (struct glyph_row *row) |
5f5c8ee5 GM |
2558 | { |
2559 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2560 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2561 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2562 | } | |
2563 | ||
2564 | ||
2565 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2566 | frame-based redisplay only. */ | |
2567 | ||
2568 | static void | |
971de7fb | 2569 | fill_up_glyph_row_area_with_spaces (struct glyph_row *row, int area) |
5f5c8ee5 GM |
2570 | { |
2571 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2572 | { | |
2573 | struct glyph *end = row->glyphs[area + 1]; | |
2574 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2575 | ||
2576 | while (text < end) | |
2577 | *text++ = space_glyph; | |
2578 | row->used[area] = text - row->glyphs[area]; | |
2579 | } | |
2580 | } | |
2581 | ||
2582 | ||
2583 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2584 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2585 | ||
2586 | static void | |
971de7fb | 2587 | fill_up_frame_row_with_spaces (struct glyph_row *row, int upto) |
5f5c8ee5 GM |
2588 | { |
2589 | int i = row->used[TEXT_AREA]; | |
2590 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2591 | |
5f5c8ee5 GM |
2592 | while (i < upto) |
2593 | glyph[i++] = space_glyph; | |
2594 | ||
2595 | row->used[TEXT_AREA] = i; | |
2596 | } | |
2597 | ||
2598 | ||
2599 | \f | |
2600 | /********************************************************************** | |
2601 | Mirroring operations on frame matrices in window matrices | |
2602 | **********************************************************************/ | |
2603 | ||
2604 | /* Set frame being updated via frame-based redisplay to F. This | |
2605 | function must be called before updates to make explicit that we are | |
2606 | working on frame matrices or not. */ | |
2607 | ||
b0ab8123 | 2608 | static void |
971de7fb | 2609 | set_frame_matrix_frame (struct frame *f) |
5f5c8ee5 GM |
2610 | { |
2611 | frame_matrix_frame = f; | |
2612 | } | |
2613 | ||
2614 | ||
2615 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2616 | DESIRED_MATRIX is the desired matrix corresponding to | |
2617 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2618 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2619 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2620 | done in frame matrices, and that we have to perform analogous | |
2621 | operations in window matrices of frame_matrix_frame. */ | |
2622 | ||
b0ab8123 | 2623 | static void |
971de7fb | 2624 | make_current (struct glyph_matrix *desired_matrix, struct glyph_matrix *current_matrix, int row) |
5f5c8ee5 GM |
2625 | { |
2626 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2627 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
59ea14cd | 2628 | bool mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2629 | |
2630 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2631 | between both rows, and does a structure assignment otherwise. */ | |
2632 | assign_row (current_row, desired_row); | |
2633 | ||
2634 | /* Enable current_row to mark it as valid. */ | |
2635 | current_row->enabled_p = 1; | |
e876ff42 | 2636 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2637 | |
2638 | /* If we are called on frame matrices, perform analogous operations | |
2639 | for window matrices. */ | |
2640 | if (frame_matrix_frame) | |
2641 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); | |
2642 | } | |
2643 | ||
2644 | ||
2645 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2646 | W's frame which has been made current (by swapping pointers between | |
2647 | current and desired matrix). Perform analogous operations in the | |
2648 | matrices of leaf windows in the window tree rooted at W. */ | |
2649 | ||
2650 | static void | |
971de7fb | 2651 | mirror_make_current (struct window *w, int frame_row) |
5f5c8ee5 GM |
2652 | { |
2653 | while (w) | |
2654 | { | |
e74aeda8 DA |
2655 | if (WINDOWP (w->contents)) |
2656 | mirror_make_current (XWINDOW (w->contents), frame_row); | |
5f5c8ee5 GM |
2657 | else |
2658 | { | |
2659 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2660 | here because the checks performed in debug mode there | |
2661 | will not allow the conversion. */ | |
2662 | int row = frame_row - w->desired_matrix->matrix_y; | |
2663 | ||
2664 | /* If FRAME_ROW is within W, assign the desired row to the | |
2665 | current row (exchanging glyph pointers). */ | |
2666 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
2667 | { | |
2668 | struct glyph_row *current_row | |
2669 | = MATRIX_ROW (w->current_matrix, row); | |
2670 | struct glyph_row *desired_row | |
2671 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
2672 | |
2673 | if (desired_row->enabled_p) | |
2674 | assign_row (current_row, desired_row); | |
2675 | else | |
2676 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 | 2677 | current_row->enabled_p = 1; |
d009ae66 EZ |
2678 | |
2679 | /* Set the Y coordinate of the mode/header line's row. | |
2680 | It is needed in draw_row_with_mouse_face to find the | |
2681 | screen coordinates. (Window-based redisplay sets | |
2682 | this in update_window, but no one seems to do that | |
2683 | for frame-based redisplay.) */ | |
2684 | if (current_row->mode_line_p) | |
2685 | current_row->y = row; | |
5f5c8ee5 GM |
2686 | } |
2687 | } | |
177c0ea7 | 2688 | |
5f5c8ee5 GM |
2689 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2690 | } | |
2691 | } | |
2692 | ||
2693 | ||
2694 | /* Perform row dance after scrolling. We are working on the range of | |
2695 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
2696 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
2697 | row I in the range 0 <= I < NLINES, the index of the original line | |
2698 | to move to I. This index is relative to the row range, i.e. 0 <= | |
2699 | index < NLINES. RETAINED_P is a vector containing zero for each | |
2700 | row 0 <= I < NLINES which is empty. | |
2701 | ||
2702 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 2703 | |
5f5c8ee5 | 2704 | void |
6f704c76 DN |
2705 | mirrored_line_dance (struct glyph_matrix *matrix, int unchanged_at_top, int nlines, |
2706 | int *copy_from, char *retained_p) | |
5f5c8ee5 GM |
2707 | { |
2708 | /* A copy of original rows. */ | |
2709 | struct glyph_row *old_rows; | |
2710 | ||
2711 | /* Rows to assign to. */ | |
2712 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 2713 | |
5f5c8ee5 GM |
2714 | int i; |
2715 | ||
2716 | /* Make a copy of the original rows. */ | |
38182d90 | 2717 | old_rows = alloca (nlines * sizeof *old_rows); |
72af86bd | 2718 | memcpy (old_rows, new_rows, nlines * sizeof *old_rows); |
5f5c8ee5 GM |
2719 | |
2720 | /* Assign new rows, maybe clear lines. */ | |
2721 | for (i = 0; i < nlines; ++i) | |
2722 | { | |
59ea14cd | 2723 | bool enabled_before_p = new_rows[i].enabled_p; |
5f5c8ee5 | 2724 | |
a54e2c05 DA |
2725 | eassert (i + unchanged_at_top < matrix->nrows); |
2726 | eassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
5f5c8ee5 GM |
2727 | new_rows[i] = old_rows[copy_from[i]]; |
2728 | new_rows[i].enabled_p = enabled_before_p; | |
2729 | ||
2730 | /* RETAINED_P is zero for empty lines. */ | |
2731 | if (!retained_p[copy_from[i]]) | |
2732 | new_rows[i].enabled_p = 0; | |
2733 | } | |
2734 | ||
153a073c | 2735 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 GM |
2736 | if (frame_matrix_frame) |
2737 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), | |
2738 | unchanged_at_top, nlines, copy_from, retained_p); | |
2739 | } | |
2740 | ||
2741 | ||
a13396c9 | 2742 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 2743 | the current frame matrix. */ |
a13396c9 GM |
2744 | |
2745 | static void | |
971de7fb | 2746 | sync_window_with_frame_matrix_rows (struct window *w) |
a13396c9 GM |
2747 | { |
2748 | struct frame *f = XFRAME (w->frame); | |
2749 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
075c507b | 2750 | int left, right, x, width; |
a13396c9 | 2751 | |
e74aeda8 DA |
2752 | /* Preconditions: W must be a live window on a tty frame. */ |
2753 | eassert (BUFFERP (w->contents)); | |
a54e2c05 | 2754 | eassert (!FRAME_WINDOW_P (f)); |
a13396c9 | 2755 | |
7df02016 KS |
2756 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
2757 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
2758 | x = w->current_matrix->matrix_x; |
2759 | width = w->current_matrix->matrix_w; | |
2760 | ||
a13396c9 GM |
2761 | window_row = w->current_matrix->rows; |
2762 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 2763 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 2764 | |
5cb88111 | 2765 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 2766 | { |
5cb88111 GM |
2767 | window_row->glyphs[LEFT_MARGIN_AREA] |
2768 | = frame_row->glyphs[0] + x; | |
2769 | window_row->glyphs[TEXT_AREA] | |
2770 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
2771 | window_row->glyphs[LAST_AREA] | |
2772 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
2773 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
2774 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
2775 | } |
2776 | } | |
2777 | ||
2778 | ||
2779 | /* Return the window in the window tree rooted in W containing frame | |
2780 | row ROW. Value is null if none is found. */ | |
2781 | ||
09ad5a91 | 2782 | static struct window * |
971de7fb | 2783 | frame_row_to_window (struct window *w, int row) |
a13396c9 GM |
2784 | { |
2785 | struct window *found = NULL; | |
177c0ea7 | 2786 | |
a13396c9 GM |
2787 | while (w && !found) |
2788 | { | |
e74aeda8 DA |
2789 | if (WINDOWP (w->contents)) |
2790 | found = frame_row_to_window (XWINDOW (w->contents), row); | |
7df02016 KS |
2791 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
2792 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 2793 | found = w; |
177c0ea7 | 2794 | |
a13396c9 GM |
2795 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2796 | } | |
2797 | ||
2798 | return found; | |
2799 | } | |
2800 | ||
2801 | ||
5f5c8ee5 GM |
2802 | /* Perform a line dance in the window tree rooted at W, after |
2803 | scrolling a frame matrix in mirrored_line_dance. | |
2804 | ||
2805 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
2806 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
2807 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
2808 | I < NLINES, the index of the original line to move to I. This | |
2809 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
2810 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
2811 | which is empty. */ | |
2812 | ||
2813 | static void | |
971de7fb | 2814 | mirror_line_dance (struct window *w, int unchanged_at_top, int nlines, int *copy_from, char *retained_p) |
5f5c8ee5 GM |
2815 | { |
2816 | while (w) | |
2817 | { | |
e74aeda8 DA |
2818 | if (WINDOWP (w->contents)) |
2819 | mirror_line_dance (XWINDOW (w->contents), unchanged_at_top, | |
5f5c8ee5 GM |
2820 | nlines, copy_from, retained_p); |
2821 | else | |
2822 | { | |
2823 | /* W is a leaf window, and we are working on its current | |
2824 | matrix m. */ | |
2825 | struct glyph_matrix *m = w->current_matrix; | |
59ea14cd PE |
2826 | int i; |
2827 | bool sync_p = 0; | |
5f5c8ee5 GM |
2828 | struct glyph_row *old_rows; |
2829 | ||
2830 | /* Make a copy of the original rows of matrix m. */ | |
38182d90 | 2831 | old_rows = alloca (m->nrows * sizeof *old_rows); |
72af86bd | 2832 | memcpy (old_rows, m->rows, m->nrows * sizeof *old_rows); |
5f5c8ee5 GM |
2833 | |
2834 | for (i = 0; i < nlines; ++i) | |
2835 | { | |
2836 | /* Frame relative line assigned to. */ | |
2837 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 2838 | |
5f5c8ee5 GM |
2839 | /* Frame relative line assigned. */ |
2840 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 2841 | |
5f5c8ee5 GM |
2842 | /* Window relative line assigned to. */ |
2843 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 2844 | |
5f5c8ee5 GM |
2845 | /* Window relative line assigned. */ |
2846 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 2847 | |
5f5c8ee5 | 2848 | /* Is assigned line inside window? */ |
59ea14cd | 2849 | bool from_inside_window_p |
5f5c8ee5 | 2850 | = window_from >= 0 && window_from < m->matrix_h; |
177c0ea7 | 2851 | |
a13396c9 | 2852 | /* Is assigned to line inside window? */ |
59ea14cd | 2853 | bool to_inside_window_p |
a13396c9 | 2854 | = window_to >= 0 && window_to < m->matrix_h; |
177c0ea7 | 2855 | |
a13396c9 | 2856 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 2857 | { |
5f5c8ee5 GM |
2858 | /* Do the assignment. The enabled_p flag is saved |
2859 | over the assignment because the old redisplay did | |
2860 | that. */ | |
59ea14cd | 2861 | bool enabled_before_p = m->rows[window_to].enabled_p; |
5f5c8ee5 GM |
2862 | m->rows[window_to] = old_rows[window_from]; |
2863 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 2864 | |
5f5c8ee5 GM |
2865 | /* If frame line is empty, window line is empty, too. */ |
2866 | if (!retained_p[copy_from[i]]) | |
2867 | m->rows[window_to].enabled_p = 0; | |
2868 | } | |
a13396c9 GM |
2869 | else if (to_inside_window_p) |
2870 | { | |
2871 | /* A copy between windows. This is an infrequent | |
2872 | case not worth optimizing. */ | |
2873 | struct frame *f = XFRAME (w->frame); | |
2874 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); | |
2875 | struct window *w2; | |
2876 | struct glyph_matrix *m2; | |
2877 | int m2_from; | |
2878 | ||
fe8b8401 | 2879 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
2880 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
2881 | -nw', FROM_FRAME sometimes has no associated window. | |
2882 | This check avoids a segfault if W2 is null. */ | |
2883 | if (w2) | |
2884 | { | |
2885 | m2 = w2->current_matrix; | |
2886 | m2_from = frame_from - m2->matrix_y; | |
2887 | copy_row_except_pointers (m->rows + window_to, | |
2888 | m2->rows + m2_from); | |
2889 | ||
2890 | /* If frame line is empty, window line is empty, too. */ | |
2891 | if (!retained_p[copy_from[i]]) | |
2892 | m->rows[window_to].enabled_p = 0; | |
2893 | } | |
a13396c9 GM |
2894 | sync_p = 1; |
2895 | } | |
2896 | else if (from_inside_window_p) | |
2897 | sync_p = 1; | |
5f5c8ee5 | 2898 | } |
a13396c9 GM |
2899 | |
2900 | /* If there was a copy between windows, make sure glyph | |
2901 | pointers are in sync with the frame matrix. */ | |
2902 | if (sync_p) | |
2903 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 2904 | |
5f5c8ee5 GM |
2905 | /* Check that no pointers are lost. */ |
2906 | CHECK_MATRIX (m); | |
2907 | } | |
2908 | ||
2909 | /* Next window on same level. */ | |
2910 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2911 | } | |
2912 | } | |
2913 | ||
2914 | ||
e509cfa6 | 2915 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
2916 | |
2917 | /* Check that window and frame matrices agree about their | |
2918 | understanding where glyphs of the rows are to find. For each | |
2919 | window in the window tree rooted at W, check that rows in the | |
2920 | matrices of leaf window agree with their frame matrices about | |
2921 | glyph pointers. */ | |
2922 | ||
85fece3e | 2923 | static void |
59fc5cf9 | 2924 | check_window_matrix_pointers (struct window *w) |
5f5c8ee5 GM |
2925 | { |
2926 | while (w) | |
2927 | { | |
e74aeda8 DA |
2928 | if (WINDOWP (w->contents)) |
2929 | check_window_matrix_pointers (XWINDOW (w->contents)); | |
5f5c8ee5 | 2930 | else |
60a8948a | 2931 | { |
5f5c8ee5 GM |
2932 | struct frame *f = XFRAME (w->frame); |
2933 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); | |
2934 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 2935 | } |
177c0ea7 | 2936 | |
5f5c8ee5 GM |
2937 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2938 | } | |
2939 | } | |
2940 | ||
2941 | ||
2942 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
2943 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
2944 | each row in WINDOW_MATRIX check that it's a slice of the | |
2945 | corresponding frame row. If it isn't, abort. */ | |
2946 | ||
2947 | static void | |
59fc5cf9 AS |
2948 | check_matrix_pointers (struct glyph_matrix *window_matrix, |
2949 | struct glyph_matrix *frame_matrix) | |
5f5c8ee5 GM |
2950 | { |
2951 | /* Row number in WINDOW_MATRIX. */ | |
2952 | int i = 0; | |
2953 | ||
2954 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
2955 | int j = window_matrix->matrix_y; | |
2956 | ||
177c0ea7 | 2957 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
2958 | slice of the row in the frame matrix. If it isn't we didn't |
2959 | mirror an operation on the frame matrix correctly. */ | |
2960 | while (i < window_matrix->nrows) | |
2961 | { | |
2962 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
2963 | frame_matrix->rows + j)) | |
1088b922 | 2964 | emacs_abort (); |
5f5c8ee5 GM |
2965 | ++i, ++j; |
2966 | } | |
2967 | } | |
2968 | ||
e509cfa6 | 2969 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
2970 | |
2971 | ||
2972 | \f | |
2973 | /********************************************************************** | |
2974 | VPOS and HPOS translations | |
2975 | **********************************************************************/ | |
2976 | ||
e509cfa6 | 2977 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
2978 | |
2979 | /* Translate vertical position VPOS which is relative to window W to a | |
2980 | vertical position relative to W's frame. */ | |
2981 | ||
2982 | static int | |
59fc5cf9 | 2983 | window_to_frame_vpos (struct window *w, int vpos) |
5f5c8ee5 | 2984 | { |
d3d50620 | 2985 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
a54e2c05 | 2986 | eassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); |
7df02016 | 2987 | vpos += WINDOW_TOP_EDGE_LINE (w); |
d3d50620 | 2988 | eassert (vpos >= 0 && vpos <= FRAME_LINES (XFRAME (w->frame))); |
5f5c8ee5 GM |
2989 | return vpos; |
2990 | } | |
2991 | ||
2992 | ||
2993 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 2994 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
2995 | |
2996 | static int | |
59fc5cf9 | 2997 | window_to_frame_hpos (struct window *w, int hpos) |
5f5c8ee5 | 2998 | { |
d3d50620 | 2999 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 3000 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
3001 | return hpos; |
3002 | } | |
177c0ea7 | 3003 | |
5f5c8ee5 GM |
3004 | #endif /* GLYPH_DEBUG */ |
3005 | ||
3006 | ||
3007 | \f | |
3008 | /********************************************************************** | |
3009 | Redrawing Frames | |
3010 | **********************************************************************/ | |
3011 | ||
2a14f83b | 3012 | /* Redraw frame F. */ |
5f5c8ee5 | 3013 | |
2a14f83b DA |
3014 | void |
3015 | redraw_frame (struct frame *f) | |
3016 | { | |
3017 | /* Error if F has no glyphs. */ | |
3018 | eassert (f->glyphs_initialized_p); | |
5f5c8ee5 | 3019 | update_begin (f); |
3224dac1 | 3020 | #ifdef MSDOS |
f2adda5e | 3021 | if (FRAME_MSDOS_P (f)) |
79d39b69 | 3022 | FRAME_TERMINAL (f)->set_terminal_modes_hook (FRAME_TERMINAL (f)); |
3224dac1 | 3023 | #endif |
385ed61f | 3024 | clear_frame (f); |
5f5c8ee5 GM |
3025 | clear_current_matrices (f); |
3026 | update_end (f); | |
daf01701 | 3027 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3028 | fflush (FRAME_TTY (f)->output); |
5f5c8ee5 GM |
3029 | windows_or_buffers_changed++; |
3030 | /* Mark all windows as inaccurate, so that every window will have | |
3031 | its redisplay done. */ | |
3032 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
3033 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
3034 | f->garbaged = 0; | |
5f5c8ee5 GM |
3035 | } |
3036 | ||
2a14f83b DA |
3037 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 0, 1, 0, |
3038 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. | |
3039 | If FRAME is omitted or nil, the selected frame is used. */) | |
3040 | (Lisp_Object frame) | |
5f5c8ee5 | 3041 | { |
2a14f83b DA |
3042 | redraw_frame (decode_live_frame (frame)); |
3043 | return Qnil; | |
5f5c8ee5 GM |
3044 | } |
3045 | ||
5f5c8ee5 | 3046 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", |
7ee72033 | 3047 | doc: /* Clear and redisplay all visible frames. */) |
5842a27b | 3048 | (void) |
5f5c8ee5 GM |
3049 | { |
3050 | Lisp_Object tail, frame; | |
3051 | ||
3052 | FOR_EACH_FRAME (tail, frame) | |
3053 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
2a14f83b | 3054 | redraw_frame (XFRAME (frame)); |
5f5c8ee5 GM |
3055 | |
3056 | return Qnil; | |
3057 | } | |
3058 | ||
3059 | ||
5f5c8ee5 | 3060 | \f |
5f5c8ee5 GM |
3061 | /*********************************************************************** |
3062 | Frame Update | |
3063 | ***********************************************************************/ | |
4588ec20 | 3064 | |
5f5c8ee5 | 3065 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 3066 | |
59ea14cd PE |
3067 | If FORCE_P, don't let redisplay be stopped by detecting pending input. |
3068 | If INHIBIT_HAIRY_ID_P, don't try scrolling. | |
177c0ea7 | 3069 | |
59ea14cd | 3070 | Value is true if redisplay was stopped due to pending input. */ |
4588ec20 | 3071 | |
59ea14cd PE |
3072 | bool |
3073 | update_frame (struct frame *f, bool force_p, bool inhibit_hairy_id_p) | |
5f5c8ee5 | 3074 | { |
59ea14cd PE |
3075 | /* True means display has been paused because of pending input. */ |
3076 | bool paused_p; | |
5f5c8ee5 GM |
3077 | struct window *root_window = XWINDOW (f->root_window); |
3078 | ||
a2130dbb KS |
3079 | if (redisplay_dont_pause) |
3080 | force_p = 1; | |
6fd326b7 | 3081 | else if (!force_p && detect_input_pending_ignore_squeezables ()) |
d012c62b | 3082 | { |
6fd326b7 DA |
3083 | paused_p = 1; |
3084 | goto do_pause; | |
d012c62b | 3085 | } |
d012c62b | 3086 | |
5f5c8ee5 | 3087 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3088 | { |
5f5c8ee5 GM |
3089 | /* We are working on window matrix basis. All windows whose |
3090 | flag must_be_updated_p is set have to be updated. */ | |
3091 | ||
3092 | /* Record that we are not working on frame matrices. */ | |
3093 | set_frame_matrix_frame (NULL); | |
3094 | ||
3095 | /* Update all windows in the window tree of F, maybe stopping | |
3096 | when pending input is detected. */ | |
3097 | update_begin (f); | |
3098 | ||
5a49b79c | 3099 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
3100 | /* Update the menu bar on X frames that don't have toolkit |
3101 | support. */ | |
3102 | if (WINDOWP (f->menu_bar_window)) | |
3103 | update_window (XWINDOW (f->menu_bar_window), 1); | |
5a49b79c | 3104 | #endif |
5f5c8ee5 GM |
3105 | |
3106 | /* Update the tool-bar window, if present. */ | |
9ea173e8 | 3107 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3108 | { |
9ea173e8 | 3109 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3110 | |
3111 | /* Update tool-bar window. */ | |
3112 | if (w->must_be_updated_p) | |
4588ec20 | 3113 | { |
153a073c PJ |
3114 | Lisp_Object tem; |
3115 | ||
5f5c8ee5 GM |
3116 | update_window (w, 1); |
3117 | w->must_be_updated_p = 0; | |
3118 | ||
3119 | /* Swap tool-bar strings. We swap because we want to | |
3120 | reuse strings. */ | |
9ea173e8 | 3121 | tem = f->current_tool_bar_string; |
f00af5b1 PE |
3122 | fset_current_tool_bar_string (f, f->desired_tool_bar_string); |
3123 | fset_desired_tool_bar_string (f, tem); | |
4588ec20 JB |
3124 | } |
3125 | } | |
177c0ea7 | 3126 | |
5f5c8ee5 GM |
3127 | |
3128 | /* Update windows. */ | |
3129 | paused_p = update_window_tree (root_window, force_p); | |
3130 | update_end (f); | |
177c0ea7 | 3131 | |
6b61353c | 3132 | /* This flush is a performance bottleneck under X, |
e581a466 | 3133 | and it doesn't seem to be necessary anyway (in general). |
6b61353c | 3134 | It is necessary when resizing the window with the mouse, or |
e581a466 | 3135 | at least the fringes are not redrawn in a timely manner. ++kfs */ |
6b61353c | 3136 | if (f->force_flush_display_p) |
e581a466 KL |
3137 | { |
3138 | FRAME_RIF (f)->flush_display (f); | |
3139 | f->force_flush_display_p = 0; | |
3140 | } | |
4588ec20 | 3141 | } |
5f5c8ee5 GM |
3142 | else |
3143 | { | |
3144 | /* We are working on frame matrix basis. Set the frame on whose | |
3145 | frame matrix we operate. */ | |
3146 | set_frame_matrix_frame (f); | |
3147 | ||
868dd24b | 3148 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3149 | build_frame_matrix (f); |
177c0ea7 | 3150 | |
868dd24b GM |
3151 | /* Update the display */ |
3152 | update_begin (f); | |
5f5c8ee5 | 3153 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3154 | update_end (f); |
3155 | ||
7d2f1216 | 3156 | if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f)) |
3224dac1 | 3157 | { |
0b0d3e0b KL |
3158 | if (FRAME_TTY (f)->termscript) |
3159 | fflush (FRAME_TTY (f)->termscript); | |
7d2f1216 EZ |
3160 | if (FRAME_TERMCAP_P (f)) |
3161 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3162 | } |
868dd24b | 3163 | |
5f5c8ee5 | 3164 | /* Check window matrices for lost pointers. */ |
e509cfa6 | 3165 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
3166 | check_window_matrix_pointers (root_window); |
3167 | add_frame_display_history (f, paused_p); | |
3168 | #endif | |
5f5c8ee5 GM |
3169 | } |
3170 | ||
993d4ab6 | 3171 | do_pause: |
5f5c8ee5 GM |
3172 | /* Reset flags indicating that a window should be updated. */ |
3173 | set_window_update_flags (root_window, 0); | |
177c0ea7 | 3174 | |
868dd24b | 3175 | display_completed = !paused_p; |
5f5c8ee5 | 3176 | return paused_p; |
4588ec20 | 3177 | } |
5f5c8ee5 | 3178 | |
b5e9cbb6 EZ |
3179 | /* Update a TTY frame F that has a menu dropped down over some of its |
3180 | glyphs. This is like the second part of update_frame, but it | |
3181 | doesn't call build_frame_matrix, because we already have the | |
3182 | desired matrix prepared, and don't want it to be overwritten by the | |
3183 | text of the normal display. */ | |
3184 | void | |
3185 | update_frame_with_menu (struct frame *f) | |
3186 | { | |
3187 | struct window *root_window = XWINDOW (f->root_window); | |
e7873136 | 3188 | bool paused_p; |
b5e9cbb6 | 3189 | |
e7873136 | 3190 | eassert (FRAME_TERMCAP_P (f)); |
b5e9cbb6 EZ |
3191 | |
3192 | /* We are working on frame matrix basis. Set the frame on whose | |
3193 | frame matrix we operate. */ | |
3194 | set_frame_matrix_frame (f); | |
3195 | ||
3196 | /* Update the display */ | |
3197 | update_begin (f); | |
141f1ff7 EZ |
3198 | /* Force update_frame_1 not to stop due to pending input, and not |
3199 | try scrolling. */ | |
b5e9cbb6 EZ |
3200 | paused_p = update_frame_1 (f, 1, 1); |
3201 | update_end (f); | |
3202 | ||
3203 | if (FRAME_TTY (f)->termscript) | |
3204 | fflush (FRAME_TTY (f)->termscript); | |
3205 | fflush (FRAME_TTY (f)->output); | |
3206 | /* Check window matrices for lost pointers. */ | |
3207 | #if GLYPH_DEBUG | |
ffc3882f EZ |
3208 | #if 0 |
3209 | /* We cannot possibly survive the matrix pointers check, since | |
3210 | we have overwritten parts of the frame glyph matrix without | |
3211 | making any updates to the window matrices. */ | |
b5e9cbb6 | 3212 | check_window_matrix_pointers (root_window); |
ffc3882f | 3213 | #endif |
b5e9cbb6 EZ |
3214 | add_frame_display_history (f, paused_p); |
3215 | #endif | |
3216 | ||
3217 | /* Reset flags indicating that a window should be updated. */ | |
3218 | set_window_update_flags (root_window, 0); | |
3219 | } | |
5f5c8ee5 | 3220 | |
4588ec20 | 3221 | \f |
5f5c8ee5 GM |
3222 | /************************************************************************ |
3223 | Window-based updates | |
3224 | ************************************************************************/ | |
3225 | ||
59ea14cd PE |
3226 | /* Perform updates in window tree rooted at W. |
3227 | If FORCE_P, don't stop updating if input is pending. */ | |
5f5c8ee5 | 3228 | |
59ea14cd PE |
3229 | static bool |
3230 | update_window_tree (struct window *w, bool force_p) | |
5f5c8ee5 | 3231 | { |
59ea14cd | 3232 | bool paused_p = 0; |
177c0ea7 | 3233 | |
5f5c8ee5 GM |
3234 | while (w && !paused_p) |
3235 | { | |
e74aeda8 DA |
3236 | if (WINDOWP (w->contents)) |
3237 | paused_p |= update_window_tree (XWINDOW (w->contents), force_p); | |
5f5c8ee5 GM |
3238 | else if (w->must_be_updated_p) |
3239 | paused_p |= update_window (w, force_p); | |
3240 | ||
3241 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3242 | } | |
3243 | ||
3244 | return paused_p; | |
3245 | } | |
3246 | ||
3247 | ||
59ea14cd PE |
3248 | /* Update window W if its flag must_be_updated_p is set. |
3249 | If FORCE_P, don't stop updating if input is pending. */ | |
5f5c8ee5 GM |
3250 | |
3251 | void | |
59ea14cd | 3252 | update_single_window (struct window *w, bool force_p) |
5f5c8ee5 GM |
3253 | { |
3254 | if (w->must_be_updated_p) | |
3255 | { | |
3256 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
3257 | ||
3258 | /* Record that this is not a frame-based redisplay. */ | |
3259 | set_frame_matrix_frame (NULL); | |
3260 | ||
a2130dbb KS |
3261 | if (redisplay_dont_pause) |
3262 | force_p = 1; | |
d012c62b | 3263 | |
5f5c8ee5 GM |
3264 | /* Update W. */ |
3265 | update_begin (f); | |
3266 | update_window (w, force_p); | |
3267 | update_end (f); | |
4588ec20 | 3268 | |
5f5c8ee5 GM |
3269 | /* Reset flag in W. */ |
3270 | w->must_be_updated_p = 0; | |
3271 | } | |
3272 | } | |
4588ec20 | 3273 | |
93e023fc | 3274 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 3275 | |
408f5064 GM |
3276 | /* Redraw lines from the current matrix of window W that are |
3277 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
3278 | ||
3279 | static void | |
971de7fb | 3280 | redraw_overlapped_rows (struct window *w, int yb) |
408f5064 | 3281 | { |
d8ee7803 | 3282 | int i; |
fa971ac3 | 3283 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3fc809e2 | 3284 | |
408f5064 GM |
3285 | /* If rows overlapping others have been changed, the rows being |
3286 | overlapped have to be redrawn. This won't draw lines that have | |
3287 | already been drawn in update_window_line because overlapped_p in | |
3288 | desired rows is 0, so after row assignment overlapped_p in | |
3289 | current rows is 0. */ | |
3290 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
3291 | { | |
e876ff42 | 3292 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
3293 | |
3294 | if (!row->enabled_p) | |
3295 | break; | |
3296 | else if (row->mode_line_p) | |
3297 | continue; | |
177c0ea7 | 3298 | |
408f5064 GM |
3299 | if (row->overlapped_p) |
3300 | { | |
3301 | enum glyph_row_area area; | |
177c0ea7 | 3302 | |
408f5064 GM |
3303 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
3304 | { | |
f60e429a DA |
3305 | output_cursor_to (w, i, 0, row->y, |
3306 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 3307 | if (row->used[area]) |
7f780da6 DA |
3308 | FRAME_RIF (f)->write_glyphs (w, row, row->glyphs[area], |
3309 | area, row->used[area]); | |
3310 | FRAME_RIF (f)->clear_end_of_line (w, row, area, -1); | |
408f5064 | 3311 | } |
177c0ea7 | 3312 | |
408f5064 GM |
3313 | row->overlapped_p = 0; |
3314 | } | |
3315 | ||
e876ff42 | 3316 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
3317 | break; |
3318 | } | |
3319 | } | |
3320 | ||
3321 | ||
3322 | /* Redraw lines from the current matrix of window W that overlap | |
3323 | others. YB is bottom-most y-position in W. */ | |
3324 | ||
3325 | static void | |
971de7fb | 3326 | redraw_overlapping_rows (struct window *w, int yb) |
408f5064 GM |
3327 | { |
3328 | int i, bottom_y; | |
3329 | struct glyph_row *row; | |
fa971ac3 | 3330 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
3fc809e2 | 3331 | |
408f5064 GM |
3332 | for (i = 0; i < w->current_matrix->nrows; ++i) |
3333 | { | |
3334 | row = w->current_matrix->rows + i; | |
3335 | ||
3336 | if (!row->enabled_p) | |
3337 | break; | |
3338 | else if (row->mode_line_p) | |
3339 | continue; | |
177c0ea7 | 3340 | |
408f5064 GM |
3341 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
3342 | ||
b4b2c2ca | 3343 | if (row->overlapping_p) |
408f5064 | 3344 | { |
41124e06 YM |
3345 | int overlaps = 0; |
3346 | ||
b4b2c2ca | 3347 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) && i > 0 |
41124e06 YM |
3348 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) |
3349 | overlaps |= OVERLAPS_PRED; | |
b4b2c2ca | 3350 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) && bottom_y < yb |
41124e06 YM |
3351 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) |
3352 | overlaps |= OVERLAPS_SUCC; | |
3353 | ||
3354 | if (overlaps) | |
3355 | { | |
3356 | if (row->used[LEFT_MARGIN_AREA]) | |
3357 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
3358 | ||
3359 | if (row->used[TEXT_AREA]) | |
3360 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
3361 | ||
3362 | if (row->used[RIGHT_MARGIN_AREA]) | |
3363 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
3364 | ||
c5e87d10 | 3365 | /* Record in neighbor rows that ROW overwrites part of |
41124e06 YM |
3366 | their display. */ |
3367 | if (overlaps & OVERLAPS_PRED) | |
3368 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
3369 | if (overlaps & OVERLAPS_SUCC) | |
3370 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
3371 | } | |
408f5064 GM |
3372 | } |
3373 | ||
3374 | if (bottom_y >= yb) | |
3375 | break; | |
3376 | } | |
3377 | } | |
3378 | ||
93e023fc KS |
3379 | #endif /* HAVE_WINDOW_SYSTEM */ |
3380 | ||
408f5064 | 3381 | |
09ad5a91 | 3382 | #if defined GLYPH_DEBUG && 0 |
93962bfa GM |
3383 | |
3384 | /* Check that no row in the current matrix of window W is enabled | |
3385 | which is below what's displayed in the window. */ | |
3386 | ||
09ad5a91 | 3387 | static void |
971de7fb | 3388 | check_current_matrix_flags (struct window *w) |
93962bfa | 3389 | { |
59ea14cd | 3390 | bool last_seen_p = 0; |
93962bfa GM |
3391 | int i, yb = window_text_bottom_y (w); |
3392 | ||
3393 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
3394 | { | |
3395 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
3396 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3397 | last_seen_p = 1; | |
3398 | else if (last_seen_p && row->enabled_p) | |
1088b922 | 3399 | emacs_abort (); |
93962bfa GM |
3400 | } |
3401 | } | |
3402 | ||
3403 | #endif /* GLYPH_DEBUG */ | |
3404 | ||
3405 | ||
59ea14cd PE |
3406 | /* Update display of window W. |
3407 | If FORCE_P, don't stop updating when input is pending. */ | |
5f5c8ee5 | 3408 | |
59ea14cd PE |
3409 | static bool |
3410 | update_window (struct window *w, bool force_p) | |
4588ec20 | 3411 | { |
5f5c8ee5 | 3412 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
59ea14cd | 3413 | bool paused_p; |
5f5c8ee5 | 3414 | int preempt_count = baud_rate / 2400 + 1; |
597cfb3f | 3415 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
e509cfa6 | 3416 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 3417 | /* Check that W's frame doesn't have glyph matrices. */ |
a54e2c05 | 3418 | eassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 3419 | #endif |
5f5c8ee5 GM |
3420 | |
3421 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb | 3422 | if (!force_p) |
a2d5fca0 | 3423 | detect_input_pending_ignore_squeezables (); |
4588ec20 | 3424 | |
5f5c8ee5 GM |
3425 | /* If forced to complete the update, or if no input is pending, do |
3426 | the update. */ | |
8fd9a666 | 3427 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 3428 | { |
5f5c8ee5 GM |
3429 | struct glyph_row *row, *end; |
3430 | struct glyph_row *mode_line_row; | |
56974e03 | 3431 | struct glyph_row *header_line_row; |
59ea14cd PE |
3432 | int yb; |
3433 | bool changed_p = 0, mouse_face_overwritten_p = 0; | |
0bc32927 | 3434 | int n_updated = 0; |
5f5c8ee5 GM |
3435 | |
3436 | rif->update_window_begin_hook (w); | |
3437 | yb = window_text_bottom_y (w); | |
138c0ae8 EZ |
3438 | row = MATRIX_ROW (desired_matrix, 0); |
3439 | end = MATRIX_MODE_LINE_ROW (desired_matrix); | |
177c0ea7 | 3440 | |
394305db EZ |
3441 | /* Take note of the header line, if there is one. We will |
3442 | update it below, after updating all of the window's lines. */ | |
5f5c8ee5 | 3443 | if (row->mode_line_p) |
56974e03 GM |
3444 | { |
3445 | header_line_row = row; | |
3446 | ++row; | |
3447 | } | |
3448 | else | |
3449 | header_line_row = NULL; | |
5f5c8ee5 GM |
3450 | |
3451 | /* Update the mode line, if necessary. */ | |
3452 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
3453 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
3454 | { | |
3455 | mode_line_row->y = yb; | |
3456 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
3457 | desired_matrix), |
3458 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3459 | } |
3460 | ||
3461 | /* Find first enabled row. Optimizations in redisplay_internal | |
3462 | may lead to an update with only one row enabled. There may | |
3463 | be also completely empty matrices. */ | |
3464 | while (row < end && !row->enabled_p) | |
3465 | ++row; | |
177c0ea7 | 3466 | |
bfdcafe1 | 3467 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 3468 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
3469 | { |
3470 | int rc = scrolling_window (w, header_line_row != NULL); | |
3471 | if (rc < 0) | |
3472 | { | |
3473 | /* All rows were found to be equal. */ | |
3474 | paused_p = 0; | |
3475 | goto set_cursor; | |
3476 | } | |
3477 | else if (rc > 0) | |
6b61353c KH |
3478 | { |
3479 | /* We've scrolled the display. */ | |
3480 | force_p = 1; | |
3481 | changed_p = 1; | |
3482 | } | |
5f5c8ee5 GM |
3483 | } |
3484 | ||
3485 | /* Update the rest of the lines. */ | |
0bc32927 | 3486 | for (; row < end && (force_p || !input_pending); ++row) |
394305db EZ |
3487 | /* scrolling_window resets the enabled_p flag of the rows it |
3488 | reuses from current_matrix. */ | |
b7412313 | 3489 | if (row->enabled_p) |
5f5c8ee5 GM |
3490 | { |
3491 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
3492 | int i; | |
177c0ea7 | 3493 | |
153a073c | 3494 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
3495 | detect_input_pending. If it's done too often, |
3496 | scrolling large windows with repeated scroll-up | |
3497 | commands will too quickly pause redisplay. */ | |
e87b8809 | 3498 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 3499 | detect_input_pending_ignore_squeezables (); |
e876ff42 GM |
3500 | changed_p |= update_window_line (w, vpos, |
3501 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3502 | |
3503 | /* Mark all rows below the last visible one in the current | |
3504 | matrix as invalid. This is necessary because of | |
3505 | variable line heights. Consider the case of three | |
3506 | successive redisplays, where the first displays 5 | |
3507 | lines, the second 3 lines, and the third 5 lines again. | |
3508 | If the second redisplay wouldn't mark rows in the | |
3509 | current matrix invalid, the third redisplay might be | |
3510 | tempted to optimize redisplay based on lines displayed | |
3511 | in the first redisplay. */ | |
3512 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3513 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
3514 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
3515 | } | |
3516 | ||
3517 | /* Was display preempted? */ | |
3518 | paused_p = row < end; | |
177c0ea7 | 3519 | |
56974e03 | 3520 | set_cursor: |
177c0ea7 | 3521 | |
6b61353c KH |
3522 | /* Update the header line after scrolling because a new header |
3523 | line would otherwise overwrite lines at the top of the window | |
3524 | that can be scrolled. */ | |
3525 | if (header_line_row && header_line_row->enabled_p) | |
3526 | { | |
3527 | header_line_row->y = 0; | |
3528 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
6b61353c KH |
3529 | } |
3530 | ||
153a073c | 3531 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
3532 | if (!paused_p && !w->pseudo_window_p) |
3533 | { | |
93e023fc | 3534 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
3535 | if (changed_p && rif->fix_overlapping_area) |
3536 | { | |
3537 | redraw_overlapped_rows (w, yb); | |
3538 | redraw_overlapping_rows (w, yb); | |
3539 | } | |
93e023fc | 3540 | #endif |
177c0ea7 | 3541 | |
5f5c8ee5 GM |
3542 | /* Make cursor visible at cursor position of W. */ |
3543 | set_window_cursor_after_update (w); | |
3544 | ||
e876ff42 GM |
3545 | #if 0 /* Check that current matrix invariants are satisfied. This is |
3546 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
3547 | IF_DEBUG (check_matrix_invariants (w)); |
3548 | #endif | |
4588ec20 | 3549 | } |
5f5c8ee5 | 3550 | |
e509cfa6 | 3551 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
3552 | /* Remember the redisplay method used to display the matrix. */ |
3553 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
3554 | #endif | |
408f5064 | 3555 | |
6b61353c KH |
3556 | #ifdef HAVE_WINDOW_SYSTEM |
3557 | update_window_fringes (w, 0); | |
3558 | #endif | |
3559 | ||
56974e03 GM |
3560 | /* End the update of window W. Don't set the cursor if we |
3561 | paused updating the display because in this case, | |
3562 | set_window_cursor_after_update hasn't been called, and | |
f60e429a | 3563 | W->output_cursor doesn't contain the cursor location. */ |
56974e03 | 3564 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); |
4588ec20 | 3565 | } |
5f5c8ee5 GM |
3566 | else |
3567 | paused_p = 1; | |
3568 | ||
e509cfa6 | 3569 | #ifdef GLYPH_DEBUG |
0cffd9d8 | 3570 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
3571 | add_window_display_history (w, w->current_matrix->method, paused_p); |
3572 | #endif | |
177c0ea7 | 3573 | |
5f5c8ee5 | 3574 | clear_glyph_matrix (desired_matrix); |
408f5064 | 3575 | |
5f5c8ee5 | 3576 | return paused_p; |
4588ec20 JB |
3577 | } |
3578 | ||
b64b3980 | 3579 | |
5f5c8ee5 GM |
3580 | /* Update the display of area AREA in window W, row number VPOS. |
3581 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
3582 | ||
3583 | static void | |
7f780da6 DA |
3584 | update_marginal_area (struct window *w, struct glyph_row *updated_row, |
3585 | enum glyph_row_area area, int vpos) | |
b64b3980 | 3586 | { |
5f5c8ee5 | 3587 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 3588 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 | 3589 | |
5f5c8ee5 GM |
3590 | /* Set cursor to start of glyphs, write them, and clear to the end |
3591 | of the area. I don't think that something more sophisticated is | |
3592 | necessary here, since marginal areas will not be the default. */ | |
f60e429a | 3593 | output_cursor_to (w, vpos, 0, desired_row->y, 0); |
5f5c8ee5 | 3594 | if (desired_row->used[area]) |
7f780da6 DA |
3595 | rif->write_glyphs (w, updated_row, desired_row->glyphs[area], |
3596 | area, desired_row->used[area]); | |
3597 | rif->clear_end_of_line (w, updated_row, area, -1); | |
b64b3980 | 3598 | } |
23b0200c | 3599 | |
352f1545 | 3600 | |
408f5064 | 3601 | /* Update the display of the text area of row VPOS in window W. |
59ea14cd | 3602 | Value is true if display has changed. */ |
5f5c8ee5 | 3603 | |
59ea14cd | 3604 | static bool |
7f780da6 | 3605 | update_text_area (struct window *w, struct glyph_row *updated_row, int vpos) |
23b0200c | 3606 | { |
5f5c8ee5 GM |
3607 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
3608 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3609 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
59ea14cd | 3610 | bool changed_p = 0; |
177c0ea7 | 3611 | |
5f5c8ee5 GM |
3612 | /* If rows are at different X or Y, or rows have different height, |
3613 | or the current row is marked invalid, write the entire line. */ | |
3614 | if (!current_row->enabled_p | |
3615 | || desired_row->y != current_row->y | |
3616 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
3617 | || desired_row->phys_ascent != current_row->phys_ascent |
3618 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 3619 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 3620 | || current_row->overlapped_p |
fee8b690 CY |
3621 | /* This next line is necessary for correctly redrawing |
3622 | mouse-face areas after scrolling and other operations. | |
3623 | However, it causes excessive flickering when mouse is moved | |
3624 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
3625 | line doesn't seem to hurt anything. -- cyd. |
3626 | But it is still needed for the header line. -- kfs. */ | |
3627 | || (current_row->mouse_face_p | |
3628 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
3629 | || current_row->x != desired_row->x) |
3630 | { | |
f60e429a | 3631 | output_cursor_to (w, vpos, 0, desired_row->y, desired_row->x); |
177c0ea7 | 3632 | |
5f5c8ee5 | 3633 | if (desired_row->used[TEXT_AREA]) |
7f780da6 DA |
3634 | rif->write_glyphs (w, updated_row, desired_row->glyphs[TEXT_AREA], |
3635 | TEXT_AREA, desired_row->used[TEXT_AREA]); | |
177c0ea7 | 3636 | |
5f5c8ee5 | 3637 | /* Clear to end of window. */ |
7f780da6 | 3638 | rif->clear_end_of_line (w, updated_row, TEXT_AREA, -1); |
408f5064 | 3639 | changed_p = 1; |
60f2f3f1 GM |
3640 | |
3641 | /* This erases the cursor. We do this here because | |
3642 | notice_overwritten_cursor cannot easily check this, which | |
3643 | might indicate that the whole functionality of | |
3644 | notice_overwritten_cursor would better be implemented here. | |
3645 | On the other hand, we need notice_overwritten_cursor as long | |
3646 | as mouse highlighting is done asynchronously outside of | |
3647 | redisplay. */ | |
3648 | if (vpos == w->phys_cursor.vpos) | |
3649 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
3650 | } |
3651 | else | |
3652 | { | |
3653 | int stop, i, x; | |
3654 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
3655 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
59ea14cd | 3656 | bool overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 3657 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
59ea14cd | 3658 | bool abort_skipping = 0; |
5f5c8ee5 | 3659 | |
78897758 YM |
3660 | /* If the desired row extends its face to the text area end, and |
3661 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
3662 | make sure we write at least one glyph, so that the face |
3663 | extension actually takes place. */ | |
78897758 YM |
3664 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
3665 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
3666 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
3667 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 3668 | --desired_stop_pos; |
177c0ea7 | 3669 | |
5f5c8ee5 GM |
3670 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
3671 | i = 0; | |
3672 | x = desired_row->x; | |
8399f8a0 GM |
3673 | |
3674 | /* Loop over glyphs that current and desired row may have | |
3675 | in common. */ | |
5f5c8ee5 | 3676 | while (i < stop) |
352f1545 | 3677 | { |
59ea14cd | 3678 | bool can_skip_p = !abort_skipping; |
177c0ea7 | 3679 | |
5f5c8ee5 | 3680 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
3681 | don't have to be written. We can't skip if the last |
3682 | current glyph overlaps the glyph to its right. For | |
3683 | example, consider a current row of `if ' with the `f' in | |
3684 | Courier bold so that it overlaps the ` ' to its right. | |
3685 | If the desired row is ` ', we would skip over the space | |
3686 | after the `if' and there would remain a pixel from the | |
3687 | `f' on the screen. */ | |
3688 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 3689 | { |
e47306e6 GM |
3690 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
3691 | int left, right; | |
177c0ea7 | 3692 | |
e47306e6 GM |
3693 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
3694 | &left, &right); | |
91d227d9 | 3695 | can_skip_p = (right == 0 && !abort_skipping); |
352f1545 | 3696 | } |
177c0ea7 | 3697 | |
6d950f4c | 3698 | if (can_skip_p) |
352f1545 | 3699 | { |
91d227d9 CY |
3700 | int start_hpos = i; |
3701 | ||
6d950f4c GM |
3702 | while (i < stop |
3703 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
3704 | { | |
3705 | x += desired_glyph->pixel_width; | |
3706 | ++desired_glyph, ++current_glyph, ++i; | |
3707 | } | |
3708 | ||
3709 | /* Consider the case that the current row contains "xxx | |
3710 | ppp ggg" in italic Courier font, and the desired row | |
3711 | is "xxx ggg". The character `p' has lbearing, `g' | |
3712 | has not. The loop above will stop in front of the | |
3713 | first `p' in the current row. If we would start | |
3714 | writing glyphs there, we wouldn't erase the lbearing | |
3715 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 3716 | taken care of by draw_glyphs. */ |
6d950f4c GM |
3717 | if (overlapping_glyphs_p |
3718 | && i > 0 | |
3719 | && i < current_row->used[TEXT_AREA] | |
3720 | && (current_row->used[TEXT_AREA] | |
3721 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 3722 | { |
6d950f4c | 3723 | int left, right; |
177c0ea7 | 3724 | |
3a45383a | 3725 | rif->get_glyph_overhangs (current_glyph, |
d3d50620 | 3726 | XFRAME (w->frame), |
6d950f4c GM |
3727 | &left, &right); |
3728 | while (left > 0 && i > 0) | |
3729 | { | |
3730 | --i, --desired_glyph, --current_glyph; | |
3731 | x -= desired_glyph->pixel_width; | |
3732 | left -= desired_glyph->pixel_width; | |
3733 | } | |
91d227d9 CY |
3734 | |
3735 | /* Abort the skipping algorithm if we end up before | |
3736 | our starting point, to avoid looping (bug#1070). | |
3737 | This can happen when the lbearing is larger than | |
3738 | the pixel width. */ | |
3739 | abort_skipping = (i < start_hpos); | |
5f5c8ee5 | 3740 | } |
352f1545 | 3741 | } |
177c0ea7 | 3742 | |
5f5c8ee5 GM |
3743 | /* Try to avoid writing the entire rest of the desired row |
3744 | by looking for a resync point. This mainly prevents | |
3745 | mode line flickering in the case the mode line is in | |
3746 | fixed-pitch font, which it usually will be. */ | |
3747 | if (i < desired_row->used[TEXT_AREA]) | |
3748 | { | |
3749 | int start_x = x, start_hpos = i; | |
3750 | struct glyph *start = desired_glyph; | |
3751 | int current_x = x; | |
59ea14cd | 3752 | bool skip_first_p = !can_skip_p; |
6d950f4c | 3753 | |
5f5c8ee5 GM |
3754 | /* Find the next glyph that's equal again. */ |
3755 | while (i < stop | |
6d950f4c GM |
3756 | && (skip_first_p |
3757 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
3758 | && x == current_x) |
3759 | { | |
3760 | x += desired_glyph->pixel_width; | |
3761 | current_x += current_glyph->pixel_width; | |
3762 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 3763 | skip_first_p = 0; |
5f5c8ee5 | 3764 | } |
23b0200c | 3765 | |
5f5c8ee5 GM |
3766 | if (i == start_hpos || x != current_x) |
3767 | { | |
3768 | i = start_hpos; | |
3769 | x = start_x; | |
3770 | desired_glyph = start; | |
3771 | break; | |
3772 | } | |
e47306e6 | 3773 | |
f60e429a | 3774 | output_cursor_to (w, vpos, start_hpos, desired_row->y, start_x); |
7f780da6 DA |
3775 | rif->write_glyphs (w, updated_row, start, |
3776 | TEXT_AREA, i - start_hpos); | |
408f5064 | 3777 | changed_p = 1; |
5f5c8ee5 GM |
3778 | } |
3779 | } | |
177c0ea7 | 3780 | |
5f5c8ee5 GM |
3781 | /* Write the rest. */ |
3782 | if (i < desired_row->used[TEXT_AREA]) | |
3783 | { | |
f60e429a | 3784 | output_cursor_to (w, vpos, i, desired_row->y, x); |
7f780da6 DA |
3785 | rif->write_glyphs (w, updated_row, desired_glyph, |
3786 | TEXT_AREA, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 3787 | changed_p = 1; |
5f5c8ee5 | 3788 | } |
177c0ea7 | 3789 | |
5f5c8ee5 GM |
3790 | /* Maybe clear to end of line. */ |
3791 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
3792 | { | |
3793 | /* If new row extends to the end of the text area, nothing | |
3794 | has to be cleared, if and only if we did a write_glyphs | |
3795 | above. This is made sure by setting desired_stop_pos | |
3796 | appropriately above. */ | |
a54e2c05 | 3797 | eassert (i < desired_row->used[TEXT_AREA] |
78897758 YM |
3798 | || ((desired_row->used[TEXT_AREA] |
3799 | == current_row->used[TEXT_AREA]) | |
3800 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
3801 | } |
3802 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
3803 | { | |
3804 | /* If old row extends to the end of the text area, clear. */ | |
3805 | if (i >= desired_row->used[TEXT_AREA]) | |
f60e429a DA |
3806 | output_cursor_to (w, vpos, i, desired_row->y, |
3807 | desired_row->pixel_width); | |
7f780da6 | 3808 | rif->clear_end_of_line (w, updated_row, TEXT_AREA, -1); |
408f5064 | 3809 | changed_p = 1; |
5f5c8ee5 GM |
3810 | } |
3811 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 3812 | { |
5f5c8ee5 GM |
3813 | /* Otherwise clear to the end of the old row. Everything |
3814 | after that position should be clear already. */ | |
27786b2f | 3815 | int xlim; |
177c0ea7 | 3816 | |
5f5c8ee5 | 3817 | if (i >= desired_row->used[TEXT_AREA]) |
f60e429a DA |
3818 | output_cursor_to (w, vpos, i, desired_row->y, |
3819 | desired_row->pixel_width); | |
5f5c8ee5 GM |
3820 | |
3821 | /* If cursor is displayed at the end of the line, make sure | |
3822 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
3823 | with which to erase the cursor (because this method | |
3824 | doesn't work with lbearing/rbearing), so we must do it | |
3825 | this way. */ | |
3826 | if (vpos == w->phys_cursor.vpos | |
f951a506 EZ |
3827 | && (desired_row->reversed_p |
3828 | ? (w->phys_cursor.hpos < 0) | |
3829 | : (w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]))) | |
5f5c8ee5 GM |
3830 | { |
3831 | w->phys_cursor_on_p = 0; | |
27786b2f | 3832 | xlim = -1; |
5f5c8ee5 GM |
3833 | } |
3834 | else | |
27786b2f | 3835 | xlim = current_row->pixel_width; |
7f780da6 | 3836 | rif->clear_end_of_line (w, updated_row, TEXT_AREA, xlim); |
408f5064 | 3837 | changed_p = 1; |
2e8907d3 | 3838 | } |
23b0200c | 3839 | } |
408f5064 GM |
3840 | |
3841 | return changed_p; | |
23b0200c | 3842 | } |
4588ec20 | 3843 | |
5f5c8ee5 | 3844 | |
59ea14cd | 3845 | /* Update row VPOS in window W. Value is true if display has been changed. */ |
5f5c8ee5 | 3846 | |
59ea14cd PE |
3847 | static bool |
3848 | update_window_line (struct window *w, int vpos, bool *mouse_face_overwritten_p) | |
5f5c8ee5 GM |
3849 | { |
3850 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
3851 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3852 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
59ea14cd | 3853 | bool changed_p = 0; |
5f5c8ee5 | 3854 | |
177c0ea7 JB |
3855 | /* A row can be completely invisible in case a desired matrix was |
3856 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
3857 | the matrix. Make sure to make such rows current anyway, since |
3858 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
3859 | if (desired_row->mode_line_p |
3860 | || desired_row->visible_height > 0) | |
408f5064 | 3861 | { |
a54e2c05 | 3862 | eassert (desired_row->enabled_p); |
504805ac GM |
3863 | |
3864 | /* Update display of the left margin area, if there is one. */ | |
eeaf9bf3 | 3865 | if (!desired_row->full_width_p && w->left_margin_cols > 0) |
504805ac GM |
3866 | { |
3867 | changed_p = 1; | |
7f780da6 | 3868 | update_marginal_area (w, desired_row, LEFT_MARGIN_AREA, vpos); |
e9957956 EZ |
3869 | /* Setting this flag will ensure the vertical border, if |
3870 | any, between this window and the one on its left will be | |
3871 | redrawn. This is necessary because updating the left | |
3872 | margin area can potentially draw over the border. */ | |
3873 | current_row->redraw_fringe_bitmaps_p = 1; | |
504805ac | 3874 | } |
177c0ea7 | 3875 | |
504805ac | 3876 | /* Update the display of the text area. */ |
7f780da6 | 3877 | if (update_text_area (w, desired_row, vpos)) |
504805ac GM |
3878 | { |
3879 | changed_p = 1; | |
3880 | if (current_row->mouse_face_p) | |
3881 | *mouse_face_overwritten_p = 1; | |
3882 | } | |
177c0ea7 | 3883 | |
504805ac | 3884 | /* Update display of the right margin area, if there is one. */ |
eeaf9bf3 | 3885 | if (!desired_row->full_width_p && w->right_margin_cols > 0) |
504805ac GM |
3886 | { |
3887 | changed_p = 1; | |
7f780da6 | 3888 | update_marginal_area (w, desired_row, RIGHT_MARGIN_AREA, vpos); |
504805ac | 3889 | } |
177c0ea7 | 3890 | |
504805ac GM |
3891 | /* Draw truncation marks etc. */ |
3892 | if (!current_row->enabled_p | |
3893 | || desired_row->y != current_row->y | |
3894 | || desired_row->visible_height != current_row->visible_height | |
6b61353c | 3895 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 3896 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
6b61353c | 3897 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 3898 | || desired_row->mode_line_p != current_row->mode_line_p |
6b61353c | 3899 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
3900 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
3901 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
65620264 | 3902 | rif->after_update_window_line_hook (w, desired_row); |
408f5064 | 3903 | } |
177c0ea7 | 3904 | |
5f5c8ee5 GM |
3905 | /* Update current_row from desired_row. */ |
3906 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
408f5064 | 3907 | return changed_p; |
5f5c8ee5 GM |
3908 | } |
3909 | ||
3910 | ||
3911 | /* Set the cursor after an update of window W. This function may only | |
3912 | be called from update_window. */ | |
3913 | ||
3914 | static void | |
971de7fb | 3915 | set_window_cursor_after_update (struct window *w) |
4588ec20 | 3916 | { |
5f5c8ee5 GM |
3917 | struct frame *f = XFRAME (w->frame); |
3918 | int cx, cy, vpos, hpos; | |
3919 | ||
3920 | /* Not intended for frame matrix updates. */ | |
a54e2c05 | 3921 | eassert (FRAME_WINDOW_P (f)); |
177c0ea7 | 3922 | |
b96fd3e8 GM |
3923 | if (cursor_in_echo_area |
3924 | && !NILP (echo_area_buffer[0]) | |
3925 | /* If we are showing a message instead of the mini-buffer, | |
3926 | show the cursor for the message instead. */ | |
3927 | && XWINDOW (minibuf_window) == w | |
3928 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
3929 | /* These cases apply only to the frame that contains |
3930 | the active mini-buffer window. */ | |
3931 | && FRAME_HAS_MINIBUF_P (f) | |
3932 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
3933 | { | |
3934 | cx = cy = vpos = hpos = 0; | |
3935 | ||
3936 | if (cursor_in_echo_area >= 0) | |
3937 | { | |
3938 | /* If the mini-buffer is several lines high, find the last | |
3939 | line that has any text on it. Note: either all lines | |
3940 | are enabled or none. Otherwise we wouldn't be able to | |
3941 | determine Y. */ | |
862b4790 GM |
3942 | struct glyph_row *row, *last_row; |
3943 | struct glyph *glyph; | |
3944 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 3945 | |
862b4790 | 3946 | last_row = NULL; |
6206f8ce GM |
3947 | row = w->current_matrix->rows; |
3948 | while (row->enabled_p | |
3949 | && (last_row == NULL | |
3950 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 3951 | { |
862b4790 GM |
3952 | if (row->used[TEXT_AREA] |
3953 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
3954 | last_row = row; | |
6206f8ce | 3955 | ++row; |
862b4790 | 3956 | } |
177c0ea7 | 3957 | |
5f5c8ee5 GM |
3958 | if (last_row) |
3959 | { | |
6206f8ce GM |
3960 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
3961 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 3962 | |
b96fd3e8 | 3963 | while (last > start && last->charpos < 0) |
862b4790 | 3964 | --last; |
177c0ea7 | 3965 | |
862b4790 GM |
3966 | for (glyph = start; glyph < last; ++glyph) |
3967 | { | |
3968 | cx += glyph->pixel_width; | |
3969 | ++hpos; | |
3970 | } | |
3971 | ||
5f5c8ee5 | 3972 | cy = last_row->y; |
862b4790 | 3973 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
3974 | } |
3975 | } | |
3976 | } | |
3977 | else | |
3978 | { | |
3979 | cx = w->cursor.x; | |
3980 | cy = w->cursor.y; | |
3981 | hpos = w->cursor.hpos; | |
3982 | vpos = w->cursor.vpos; | |
3983 | } | |
4588ec20 | 3984 | |
2dd61a9b | 3985 | /* Window cursor can be out of sync for horizontally split windows. |
cccaebd2 | 3986 | Horizontal position is -1 when cursor is on the left fringe. */ |
2dd61a9b DA |
3987 | hpos = clip_to_bounds (-1, hpos, w->current_matrix->matrix_w - 1); |
3988 | vpos = clip_to_bounds (0, vpos, w->current_matrix->nrows - 1); | |
f60e429a | 3989 | output_cursor_to (w, vpos, hpos, cy, cx); |
4588ec20 | 3990 | } |
4588ec20 | 3991 | |
5f5c8ee5 | 3992 | |
6df5d75f GM |
3993 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window |
3994 | tree rooted at W. */ | |
3995 | ||
3996 | void | |
59ea14cd | 3997 | set_window_update_flags (struct window *w, bool on_p) |
6df5d75f GM |
3998 | { |
3999 | while (w) | |
4000 | { | |
e74aeda8 DA |
4001 | if (WINDOWP (w->contents)) |
4002 | set_window_update_flags (XWINDOW (w->contents), on_p); | |
6df5d75f GM |
4003 | else |
4004 | w->must_be_updated_p = on_p; | |
4005 | ||
4006 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
4007 | } | |
177c0ea7 | 4008 | } |
6df5d75f GM |
4009 | |
4010 | ||
4011 | \f | |
4012 | /*********************************************************************** | |
4013 | Window-Based Scrolling | |
4014 | ***********************************************************************/ | |
4015 | ||
4016 | /* Structure describing rows in scrolling_window. */ | |
4017 | ||
4018 | struct row_entry | |
4019 | { | |
4020 | /* Number of occurrences of this row in desired and current matrix. */ | |
4021 | int old_uses, new_uses; | |
177c0ea7 | 4022 | |
6df5d75f GM |
4023 | /* Vpos of row in new matrix. */ |
4024 | int new_line_number; | |
4025 | ||
4026 | /* Bucket index of this row_entry in the hash table row_table. */ | |
ca9ce8f2 | 4027 | ptrdiff_t bucket; |
177c0ea7 | 4028 | |
6df5d75f GM |
4029 | /* The row described by this entry. */ |
4030 | struct glyph_row *row; | |
177c0ea7 | 4031 | |
6df5d75f GM |
4032 | /* Hash collision chain. */ |
4033 | struct row_entry *next; | |
4034 | }; | |
4035 | ||
4036 | /* A pool to allocate row_entry structures from, and the size of the | |
4037 | pool. The pool is reallocated in scrolling_window when we find | |
4038 | that we need a larger one. */ | |
4039 | ||
4040 | static struct row_entry *row_entry_pool; | |
ca9ce8f2 | 4041 | static ptrdiff_t row_entry_pool_size; |
6df5d75f GM |
4042 | |
4043 | /* Index of next free entry in row_entry_pool. */ | |
4044 | ||
ca9ce8f2 | 4045 | static ptrdiff_t row_entry_idx; |
6df5d75f GM |
4046 | |
4047 | /* The hash table used during scrolling, and the table's size. This | |
4048 | table is used to quickly identify equal rows in the desired and | |
4049 | current matrix. */ | |
4050 | ||
4051 | static struct row_entry **row_table; | |
ca9ce8f2 | 4052 | static ptrdiff_t row_table_size; |
6df5d75f GM |
4053 | |
4054 | /* Vectors of pointers to row_entry structures belonging to the | |
4055 | current and desired matrix, and the size of the vectors. */ | |
4056 | ||
4057 | static struct row_entry **old_lines, **new_lines; | |
0065d054 | 4058 | static ptrdiff_t old_lines_size, new_lines_size; |
6df5d75f GM |
4059 | |
4060 | /* A pool to allocate run structures from, and its size. */ | |
4061 | ||
4062 | static struct run *run_pool; | |
0065d054 | 4063 | static ptrdiff_t runs_size; |
6df5d75f GM |
4064 | |
4065 | /* A vector of runs of lines found during scrolling. */ | |
4066 | ||
4067 | static struct run **runs; | |
4068 | ||
6b1f9ba4 | 4069 | /* Add glyph row ROW to the scrolling hash table. */ |
6df5d75f | 4070 | |
b0ab8123 | 4071 | static struct row_entry * |
6b1f9ba4 | 4072 | add_row_entry (struct glyph_row *row) |
6df5d75f GM |
4073 | { |
4074 | struct row_entry *entry; | |
ca9ce8f2 | 4075 | ptrdiff_t i = row->hash % row_table_size; |
177c0ea7 | 4076 | |
6df5d75f | 4077 | entry = row_table[i]; |
a54e2c05 | 4078 | eassert (entry || verify_row_hash (row)); |
6b1f9ba4 | 4079 | while (entry && !row_equal_p (entry->row, row, 1)) |
6df5d75f | 4080 | entry = entry->next; |
177c0ea7 | 4081 | |
6df5d75f GM |
4082 | if (entry == NULL) |
4083 | { | |
4084 | entry = row_entry_pool + row_entry_idx++; | |
4085 | entry->row = row; | |
4086 | entry->old_uses = entry->new_uses = 0; | |
4087 | entry->new_line_number = 0; | |
4088 | entry->bucket = i; | |
4089 | entry->next = row_table[i]; | |
4090 | row_table[i] = entry; | |
4091 | } | |
4092 | ||
4093 | return entry; | |
4094 | } | |
4095 | ||
4096 | ||
5f5c8ee5 | 4097 | /* Try to reuse part of the current display of W by scrolling lines. |
59ea14cd | 4098 | HEADER_LINE_P means W has a header line. |
5f5c8ee5 GM |
4099 | |
4100 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4101 | Technique for Isolating Differences Between Files." It should take | |
4102 | O(N) time. | |
4103 | ||
4104 | A short outline of the steps of the algorithm | |
4105 | ||
4106 | 1. Skip lines equal at the start and end of both matrices. | |
4107 | ||
4108 | 2. Enter rows in the current and desired matrix into a symbol | |
4109 | table, counting how often they appear in both matrices. | |
4110 | ||
4111 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4112 | i.e. we assume that such lines are likely to have been moved. | |
4113 | ||
4114 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4115 | forward and backward. | |
4116 | ||
4117 | Value is | |
4118 | ||
4119 | -1 if all rows were found to be equal. | |
4120 | 0 to indicate that we did not scroll the display, or | |
4121 | 1 if we did scroll. */ | |
4122 | ||
4123 | static int | |
59ea14cd | 4124 | scrolling_window (struct window *w, bool header_line_p) |
4588ec20 | 4125 | { |
5f5c8ee5 GM |
4126 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4127 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4128 | int yb = window_text_bottom_y (w); | |
ca9ce8f2 PE |
4129 | ptrdiff_t i; |
4130 | int j, first_old, first_new, last_old, last_new; | |
4131 | int nruns, run_idx; | |
0065d054 | 4132 | ptrdiff_t n; |
6df5d75f | 4133 | struct row_entry *entry; |
fa971ac3 | 4134 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4135 | |
4136 | /* Skip over rows equal at the start. */ | |
59ea14cd | 4137 | for (i = header_line_p; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4138 | { |
bfdcafe1 GM |
4139 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4140 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4141 | ||
4142 | if (c->enabled_p | |
4143 | && d->enabled_p | |
6b61353c | 4144 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4145 | && c->y == d->y |
4146 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4147 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
6b1f9ba4 | 4148 | && row_equal_p (c, d, 1)) |
bfdcafe1 GM |
4149 | { |
4150 | assign_row (c, d); | |
4151 | d->enabled_p = 0; | |
4152 | } | |
4153 | else | |
4154 | break; | |
5f5c8ee5 | 4155 | } |
4588ec20 | 4156 | |
5f5c8ee5 GM |
4157 | /* Give up if some rows in the desired matrix are not enabled. */ |
4158 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4159 | return -1; | |
177c0ea7 | 4160 | |
5f5c8ee5 GM |
4161 | first_old = first_new = i; |
4162 | ||
4d8ade89 YM |
4163 | /* Set last_new to the index + 1 of the row that reaches the |
4164 | bottom boundary in the desired matrix. Give up if we find a | |
4165 | disabled row before we reach the bottom boundary. */ | |
5f5c8ee5 | 4166 | i = first_new + 1; |
4d8ade89 YM |
4167 | while (i < desired_matrix->nrows - 1) |
4168 | { | |
4169 | int bottom; | |
5f5c8ee5 | 4170 | |
4d8ade89 YM |
4171 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) |
4172 | return 0; | |
4173 | bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)); | |
4174 | if (bottom <= yb) | |
4175 | ++i; | |
4176 | if (bottom >= yb) | |
4177 | break; | |
4178 | } | |
5f5c8ee5 GM |
4179 | |
4180 | last_new = i; | |
4181 | ||
4d8ade89 YM |
4182 | /* Set last_old to the index + 1 of the row that reaches the bottom |
4183 | boundary in the current matrix. We don't look at the enabled | |
4184 | flag here because we plan to reuse part of the display even if | |
4185 | other parts are disabled. */ | |
5f5c8ee5 | 4186 | i = first_old + 1; |
93962bfa GM |
4187 | while (i < current_matrix->nrows - 1) |
4188 | { | |
4189 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4190 | if (bottom <= yb) | |
4191 | ++i; | |
4192 | if (bottom >= yb) | |
4193 | break; | |
4194 | } | |
4195 | ||
5f5c8ee5 GM |
4196 | last_old = i; |
4197 | ||
4198 | /* Skip over rows equal at the bottom. */ | |
4199 | i = last_new; | |
4200 | j = last_old; | |
4201 | while (i - 1 > first_new | |
4202 | && j - 1 > first_old | |
1e5b2111 EZ |
4203 | && MATRIX_ROW (current_matrix, j - 1)->enabled_p |
4204 | && (MATRIX_ROW (current_matrix, j - 1)->y | |
4205 | == MATRIX_ROW (desired_matrix, i - 1)->y) | |
4206 | && !MATRIX_ROW (desired_matrix, i - 1)->redraw_fringe_bitmaps_p | |
6b1f9ba4 | 4207 | && row_equal_p (MATRIX_ROW (desired_matrix, i - 1), |
e4e0bee9 | 4208 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
4209 | --i, --j; |
4210 | last_new = i; | |
4211 | last_old = j; | |
4212 | ||
4213 | /* Nothing to do if all rows are equal. */ | |
4214 | if (last_new == first_new) | |
4215 | return 0; | |
4216 | ||
0065d054 | 4217 | /* Check for integer overflow in size calculation. |
ca9ce8f2 PE |
4218 | |
4219 | If next_almost_prime checks (N) for divisibility by 2..10, then | |
4220 | it can return at most N + 10, e.g., next_almost_prime (1) == 11. | |
4221 | So, set next_almost_prime_increment_max to 10. | |
4222 | ||
4223 | It's just a coincidence that next_almost_prime_increment_max == | |
4224 | NEXT_ALMOST_PRIME_LIMIT - 1. If NEXT_ALMOST_PRIME_LIMIT were | |
4225 | 13, then next_almost_prime_increment_max would be 14, e.g., | |
4226 | because next_almost_prime (113) would be 127. */ | |
4227 | { | |
4228 | verify (NEXT_ALMOST_PRIME_LIMIT == 11); | |
4229 | enum { next_almost_prime_increment_max = 10 }; | |
ca9ce8f2 | 4230 | ptrdiff_t row_table_max = |
0065d054 PE |
4231 | (min (PTRDIFF_MAX, SIZE_MAX) / (3 * sizeof *row_table) |
4232 | - next_almost_prime_increment_max); | |
4233 | ptrdiff_t current_nrows_max = row_table_max - desired_matrix->nrows; | |
4234 | if (current_nrows_max < current_matrix->nrows) | |
ca9ce8f2 PE |
4235 | memory_full (SIZE_MAX); |
4236 | } | |
4237 | ||
6df5d75f | 4238 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 4239 | |
6df5d75f | 4240 | if (current_matrix->nrows > old_lines_size) |
0065d054 PE |
4241 | old_lines = xpalloc (old_lines, &old_lines_size, |
4242 | current_matrix->nrows - old_lines_size, | |
4243 | INT_MAX, sizeof *old_lines); | |
177c0ea7 | 4244 | |
6df5d75f | 4245 | if (desired_matrix->nrows > new_lines_size) |
0065d054 PE |
4246 | new_lines = xpalloc (new_lines, &new_lines_size, |
4247 | desired_matrix->nrows - new_lines_size, | |
4248 | INT_MAX, sizeof *new_lines); | |
6df5d75f | 4249 | |
ca9ce8f2 PE |
4250 | n = desired_matrix->nrows; |
4251 | n += current_matrix->nrows; | |
0065d054 | 4252 | if (row_table_size < 3 * n) |
6df5d75f | 4253 | { |
ca9ce8f2 | 4254 | ptrdiff_t size = next_almost_prime (3 * n); |
0065d054 | 4255 | row_table = xnrealloc (row_table, size, sizeof *row_table); |
ca9ce8f2 | 4256 | row_table_size = size; |
0065d054 | 4257 | memset (row_table, 0, size * sizeof *row_table); |
6df5d75f GM |
4258 | } |
4259 | ||
4260 | if (n > row_entry_pool_size) | |
0065d054 PE |
4261 | row_entry_pool = xpalloc (row_entry_pool, &row_entry_pool_size, |
4262 | n - row_entry_pool_size, | |
4263 | -1, sizeof *row_entry_pool); | |
6df5d75f GM |
4264 | |
4265 | if (desired_matrix->nrows > runs_size) | |
4266 | { | |
0065d054 PE |
4267 | runs = xnrealloc (runs, desired_matrix->nrows, sizeof *runs); |
4268 | run_pool = xnrealloc (run_pool, desired_matrix->nrows, sizeof *run_pool); | |
ca9ce8f2 | 4269 | runs_size = desired_matrix->nrows; |
6df5d75f GM |
4270 | } |
4271 | ||
4272 | nruns = run_idx = 0; | |
4273 | row_entry_idx = 0; | |
4274 | ||
4275 | /* Add rows from the current and desired matrix to the hash table | |
4276 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 4277 | |
5f5c8ee5 GM |
4278 | for (i = first_old; i < last_old; ++i) |
4279 | { | |
4280 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
4281 | { | |
6b1f9ba4 | 4282 | entry = add_row_entry (MATRIX_ROW (current_matrix, i)); |
6df5d75f GM |
4283 | old_lines[i] = entry; |
4284 | ++entry->old_uses; | |
5f5c8ee5 GM |
4285 | } |
4286 | else | |
6df5d75f | 4287 | old_lines[i] = NULL; |
5f5c8ee5 GM |
4288 | } |
4289 | ||
5f5c8ee5 GM |
4290 | for (i = first_new; i < last_new; ++i) |
4291 | { | |
a54e2c05 | 4292 | eassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); |
6b1f9ba4 | 4293 | entry = add_row_entry (MATRIX_ROW (desired_matrix, i)); |
6df5d75f GM |
4294 | ++entry->new_uses; |
4295 | entry->new_line_number = i; | |
4296 | new_lines[i] = entry; | |
5f5c8ee5 | 4297 | } |
4588ec20 | 4298 | |
5f5c8ee5 GM |
4299 | /* Identify moves based on lines that are unique and equal |
4300 | in both matrices. */ | |
4301 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
4302 | if (old_lines[i] |
4303 | && old_lines[i]->old_uses == 1 | |
4304 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 | 4305 | { |
27786b2f | 4306 | int p, q; |
6df5d75f GM |
4307 | int new_line = old_lines[i]->new_line_number; |
4308 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
4309 | |
4310 | /* Record move. */ | |
4311 | run->current_vpos = i; | |
4312 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
4313 | run->desired_vpos = new_line; | |
4314 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
4315 | run->nrows = 1; | |
4316 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
4317 | ||
4318 | /* Extend backward. */ | |
27786b2f PE |
4319 | p = i - 1; |
4320 | q = new_line - 1; | |
4321 | while (p > first_old | |
4322 | && q > first_new | |
4323 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4324 | { |
27786b2f | 4325 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 JB |
4326 | --run->current_vpos; |
4327 | --run->desired_vpos; | |
5f5c8ee5 GM |
4328 | ++run->nrows; |
4329 | run->height += h; | |
4330 | run->desired_y -= h; | |
4331 | run->current_y -= h; | |
27786b2f | 4332 | --p, --q; |
5f5c8ee5 | 4333 | } |
4588ec20 | 4334 | |
5f5c8ee5 | 4335 | /* Extend forward. */ |
27786b2f PE |
4336 | p = i + 1; |
4337 | q = new_line + 1; | |
4338 | while (p < last_old | |
4339 | && q < last_new | |
4340 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4341 | { |
27786b2f | 4342 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 | 4343 | ++run->nrows; |
5f5c8ee5 | 4344 | run->height += h; |
27786b2f | 4345 | ++p, ++q; |
5f5c8ee5 | 4346 | } |
19dff8dc | 4347 | |
5f5c8ee5 GM |
4348 | /* Insert run into list of all runs. Order runs by copied |
4349 | pixel lines. Note that we record runs that don't have to | |
4350 | be copied because they are already in place. This is done | |
4351 | because we can avoid calling update_window_line in this | |
4352 | case. */ | |
27786b2f | 4353 | for (p = 0; p < nruns && runs[p]->height > run->height; ++p) |
5f5c8ee5 | 4354 | ; |
27786b2f PE |
4355 | for (q = nruns; q > p; --q) |
4356 | runs[q] = runs[q - 1]; | |
4357 | runs[p] = run; | |
5f5c8ee5 GM |
4358 | ++nruns; |
4359 | ||
4360 | i += run->nrows; | |
4361 | } | |
4362 | else | |
4363 | ++i; | |
4588ec20 | 4364 | |
5f5c8ee5 GM |
4365 | /* Do the moves. Do it in a way that we don't overwrite something |
4366 | we want to copy later on. This is not solvable in general | |
4367 | because there is only one display and we don't have a way to | |
4368 | exchange areas on this display. Example: | |
4588ec20 | 4369 | |
5f5c8ee5 GM |
4370 | +-----------+ +-----------+ |
4371 | | A | | B | | |
4372 | +-----------+ --> +-----------+ | |
4373 | | B | | A | | |
4374 | +-----------+ +-----------+ | |
4588ec20 | 4375 | |
5f5c8ee5 GM |
4376 | Instead, prefer bigger moves, and invalidate moves that would |
4377 | copy from where we copied to. */ | |
ea0d86af | 4378 | |
5f5c8ee5 GM |
4379 | for (i = 0; i < nruns; ++i) |
4380 | if (runs[i]->nrows > 0) | |
4381 | { | |
4382 | struct run *r = runs[i]; | |
24e86043 | 4383 | |
5f5c8ee5 GM |
4384 | /* Copy on the display. */ |
4385 | if (r->current_y != r->desired_y) | |
4386 | { | |
989b42d2 | 4387 | rif->clear_window_mouse_face (w); |
5f5c8ee5 | 4388 | rif->scroll_run_hook (w, r); |
1305621b | 4389 | } |
5f5c8ee5 | 4390 | |
1305621b YM |
4391 | /* Truncate runs that copy to where we copied to, and |
4392 | invalidate runs that copy from where we copied to. */ | |
4393 | for (j = nruns - 1; j > i; --j) | |
4394 | { | |
4395 | struct run *p = runs[j]; | |
59ea14cd | 4396 | bool truncated_p = 0; |
5f5c8ee5 | 4397 | |
1305621b YM |
4398 | if (p->nrows > 0 |
4399 | && p->desired_y < r->desired_y + r->height | |
4400 | && p->desired_y + p->height > r->desired_y) | |
5f5c8ee5 | 4401 | { |
1305621b YM |
4402 | if (p->desired_y < r->desired_y) |
4403 | { | |
4404 | p->nrows = r->desired_vpos - p->desired_vpos; | |
4405 | p->height = r->desired_y - p->desired_y; | |
4406 | truncated_p = 1; | |
4407 | } | |
4408 | else | |
4409 | { | |
4410 | int nrows_copied = (r->desired_vpos + r->nrows | |
4411 | - p->desired_vpos); | |
4412 | ||
4413 | if (p->nrows <= nrows_copied) | |
4414 | p->nrows = 0; | |
4415 | else | |
4416 | { | |
4417 | int height_copied = (r->desired_y + r->height | |
4418 | - p->desired_y); | |
4419 | ||
4420 | p->current_vpos += nrows_copied; | |
4421 | p->desired_vpos += nrows_copied; | |
4422 | p->nrows -= nrows_copied; | |
4423 | p->current_y += height_copied; | |
4424 | p->desired_y += height_copied; | |
4425 | p->height -= height_copied; | |
4426 | truncated_p = 1; | |
4427 | } | |
4428 | } | |
4429 | } | |
177c0ea7 | 4430 | |
1305621b YM |
4431 | if (r->current_y != r->desired_y |
4432 | /* The condition below is equivalent to | |
4433 | ((p->current_y >= r->desired_y | |
5f5c8ee5 | 4434 | && p->current_y < r->desired_y + r->height) |
1305621b | 4435 | || (p->current_y + p->height > r->desired_y |
5f5c8ee5 | 4436 | && (p->current_y + p->height |
1305621b YM |
4437 | <= r->desired_y + r->height))) |
4438 | because we have 0 < p->height <= r->height. */ | |
4439 | && p->current_y < r->desired_y + r->height | |
4440 | && p->current_y + p->height > r->desired_y) | |
4441 | p->nrows = 0; | |
4442 | ||
4443 | /* Reorder runs by copied pixel lines if truncated. */ | |
4444 | if (truncated_p && p->nrows > 0) | |
4445 | { | |
4446 | int k = nruns - 1; | |
4447 | ||
4448 | while (runs[k]->nrows == 0 || runs[k]->height < p->height) | |
4449 | k--; | |
4450 | memmove (runs + j, runs + j + 1, (k - j) * sizeof (*runs)); | |
4451 | runs[k] = p; | |
5f5c8ee5 GM |
4452 | } |
4453 | } | |
ea0d86af | 4454 | |
5f5c8ee5 GM |
4455 | /* Assign matrix rows. */ |
4456 | for (j = 0; j < r->nrows; ++j) | |
4457 | { | |
4458 | struct glyph_row *from, *to; | |
59ea14cd | 4459 | bool to_overlapped_p; |
e876ff42 | 4460 | |
5f5c8ee5 GM |
4461 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
4462 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 4463 | to_overlapped_p = to->overlapped_p; |
e61124cd | 4464 | from->redraw_fringe_bitmaps_p = from->fringe_bitmap_periodic_p; |
5f5c8ee5 | 4465 | assign_row (to, from); |
1305621b YM |
4466 | /* The above `assign_row' actually does swap, so if we had |
4467 | an overlap in the copy destination of two runs, then | |
4468 | the second run would assign a previously disabled bogus | |
4469 | row. But thanks to the truncation code in the | |
4470 | preceding for-loop, we no longer have such an overlap, | |
4471 | and thus the assigned row should always be enabled. */ | |
a54e2c05 | 4472 | eassert (to->enabled_p); |
1305621b | 4473 | from->enabled_p = 0; |
408f5064 | 4474 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
4475 | } |
4476 | } | |
15874c59 | 4477 | |
6df5d75f GM |
4478 | /* Clear the hash table, for the next time. */ |
4479 | for (i = 0; i < row_entry_idx; ++i) | |
4480 | row_table[row_entry_pool[i].bucket] = NULL; | |
4481 | ||
aec1708a | 4482 | /* Value is 1 to indicate that we scrolled the display. */ |
908589fd | 4483 | return nruns > 0; |
5f5c8ee5 | 4484 | } |
de83c314 | 4485 | |
15874c59 | 4486 | |
4588ec20 | 4487 | \f |
5f5c8ee5 GM |
4488 | /************************************************************************ |
4489 | Frame-Based Updates | |
4490 | ************************************************************************/ | |
4588ec20 | 4491 | |
5f5c8ee5 | 4492 | /* Update the desired frame matrix of frame F. |
4588ec20 | 4493 | |
59ea14cd PE |
4494 | FORCE_P means that the update should not be stopped by pending input. |
4495 | INHIBIT_HAIRY_ID_P means that scrolling should not be tried. | |
5f5c8ee5 | 4496 | |
59ea14cd | 4497 | Value is true if update was stopped due to pending input. */ |
5f5c8ee5 | 4498 | |
59ea14cd PE |
4499 | static bool |
4500 | update_frame_1 (struct frame *f, bool force_p, bool inhibit_id_p) | |
4588ec20 | 4501 | { |
5f5c8ee5 GM |
4502 | /* Frame matrices to work on. */ |
4503 | struct glyph_matrix *current_matrix = f->current_matrix; | |
4504 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
4505 | int i; | |
59ea14cd | 4506 | bool pause_p; |
4588ec20 | 4507 | int preempt_count = baud_rate / 2400 + 1; |
5f5c8ee5 | 4508 | |
a54e2c05 | 4509 | eassert (current_matrix && desired_matrix); |
4588ec20 | 4510 | |
c37e4889 RS |
4511 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
4512 | calculate_costs (f); | |
4513 | ||
d88c2b9e RS |
4514 | if (preempt_count <= 0) |
4515 | preempt_count = 1; | |
4516 | ||
a2130dbb | 4517 | if (!force_p && detect_input_pending_ignore_squeezables ()) |
4588ec20 | 4518 | { |
27786b2f | 4519 | pause_p = 1; |
4588ec20 JB |
4520 | goto do_pause; |
4521 | } | |
4522 | ||
5f5c8ee5 | 4523 | /* If we cannot insert/delete lines, it's no use trying it. */ |
daf01701 | 4524 | if (!FRAME_LINE_INS_DEL_OK (f)) |
5f5c8ee5 | 4525 | inhibit_id_p = 1; |
7098a0fa | 4526 | |
efb859b4 | 4527 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
4528 | i/d line if just want cursor motion. */ |
4529 | for (i = 0; i < desired_matrix->nrows; i++) | |
4530 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
4531 | break; |
4532 | ||
4533 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
4534 | if (!inhibit_id_p && i < desired_matrix->nrows) |
4535 | force_p |= scrolling (f); | |
4588ec20 JB |
4536 | |
4537 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
4538 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
4539 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 4540 | |
5f5c8ee5 GM |
4541 | /* Now update the rest of the lines. */ |
4542 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 4543 | { |
5f5c8ee5 | 4544 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 4545 | { |
b6a65ac2 | 4546 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
4547 | { |
4548 | /* Flush out every so many lines. | |
4549 | Also flush out if likely to have more than 1k buffered | |
4550 | otherwise. I'm told that some telnet connections get | |
4551 | really screwed by more than 1k output at once. */ | |
fced92f1 CY |
4552 | FILE *display_output = FRAME_TTY (f)->output; |
4553 | if (display_output) | |
4588ec20 | 4554 | { |
8148369c | 4555 | ptrdiff_t outq = __fpending (display_output); |
fced92f1 CY |
4556 | if (outq > 900 |
4557 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
06b63c9b | 4558 | fflush (display_output); |
4588ec20 | 4559 | } |
4588ec20 JB |
4560 | } |
4561 | ||
d012c62b | 4562 | if (!force_p && (i - 1) % preempt_count == 0) |
a2d5fca0 | 4563 | detect_input_pending_ignore_squeezables (); |
a2960116 | 4564 | |
5f5c8ee5 | 4565 | update_frame_line (f, i); |
4588ec20 | 4566 | } |
4588ec20 | 4567 | } |
177c0ea7 | 4568 | |
7216e43b | 4569 | lint_assume (0 <= FRAME_LINES (f)); |
59ea14cd | 4570 | pause_p = 0 < i && i < FRAME_LINES (f) - 1; |
4588ec20 JB |
4571 | |
4572 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
27786b2f | 4573 | if (!pause_p) |
4588ec20 | 4574 | { |
48cf7030 | 4575 | if ((cursor_in_echo_area |
5f5c8ee5 | 4576 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 4577 | show the cursor for the message instead of for the |
5f5c8ee5 | 4578 | (now hidden) mini-buffer contents. */ |
2577053b RS |
4579 | || (EQ (minibuf_window, selected_window) |
4580 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 4581 | && !NILP (echo_area_buffer[0]))) |
2577053b | 4582 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 4583 | the active mini-buffer window. */ |
2577053b | 4584 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 4585 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 4586 | { |
7df02016 | 4587 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
4588 | int row, col; |
4589 | ||
4590 | if (cursor_in_echo_area < 0) | |
4591 | { | |
5f5c8ee5 GM |
4592 | /* Negative value of cursor_in_echo_area means put |
4593 | cursor at beginning of line. */ | |
648fa17d JB |
4594 | row = top; |
4595 | col = 0; | |
4596 | } | |
1113d9db | 4597 | else |
648fa17d | 4598 | { |
5f5c8ee5 GM |
4599 | /* Positive value of cursor_in_echo_area means put |
4600 | cursor at the end of the prompt. If the mini-buffer | |
4601 | is several lines high, find the last line that has | |
4602 | any text on it. */ | |
7df02016 | 4603 | row = FRAME_LINES (f); |
177c0ea7 | 4604 | do |
648fa17d | 4605 | { |
5f5c8ee5 GM |
4606 | --row; |
4607 | col = 0; | |
177c0ea7 | 4608 | |
5f5c8ee5 GM |
4609 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
4610 | { | |
4611 | /* Frame rows are filled up with spaces that | |
4612 | must be ignored here. */ | |
5f5c8ee5 GM |
4613 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
4614 | row); | |
4615 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
4616 | struct glyph *last = start + r->used[TEXT_AREA]; | |
4617 | ||
4618 | while (last > start | |
4619 | && (last - 1)->charpos < 0) | |
4620 | --last; | |
177c0ea7 | 4621 | |
5f5c8ee5 GM |
4622 | col = last - start; |
4623 | } | |
648fa17d JB |
4624 | } |
4625 | while (row > top && col == 0); | |
4626 | ||
6395da5c | 4627 | /* Make sure COL is not out of range. */ |
868e640e | 4628 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 4629 | { |
6395da5c | 4630 | /* If we have another row, advance cursor into it. */ |
7df02016 | 4631 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 4632 | { |
7df02016 | 4633 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
4634 | row++; |
4635 | } | |
4636 | /* Otherwise move it back in range. */ | |
4637 | else | |
868e640e | 4638 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
4639 | } |
4640 | } | |
4641 | ||
385ed61f | 4642 | cursor_to (f, row, col); |
1113d9db | 4643 | } |
4588ec20 | 4644 | else |
5f5c8ee5 GM |
4645 | { |
4646 | /* We have only one cursor on terminal frames. Use it to | |
4647 | display the cursor of the selected window. */ | |
4648 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
4649 | if (w->cursor.vpos >= 0 |
4650 | /* The cursor vpos may be temporarily out of bounds | |
4651 | in the following situation: There is one window, | |
4652 | with the cursor in the lower half of it. The window | |
4653 | is split, and a message causes a redisplay before | |
4654 | a new cursor position has been computed. */ | |
7df02016 | 4655 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
4656 | { |
4657 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
4658 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
4659 | ||
eeaf9bf3 | 4660 | x += max (0, w->left_margin_cols); |
385ed61f | 4661 | cursor_to (f, y, x); |
5f5c8ee5 GM |
4662 | } |
4663 | } | |
4588ec20 JB |
4664 | } |
4665 | ||
4588ec20 JB |
4666 | do_pause: |
4667 | ||
5f5c8ee5 | 4668 | clear_desired_matrices (f); |
27786b2f | 4669 | return pause_p; |
4588ec20 JB |
4670 | } |
4671 | ||
4588ec20 | 4672 | |
5f5c8ee5 | 4673 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 4674 | |
59ea14cd | 4675 | static bool |
971de7fb | 4676 | scrolling (struct frame *frame) |
4588ec20 JB |
4677 | { |
4678 | int unchanged_at_top, unchanged_at_bottom; | |
4679 | int window_size; | |
4680 | int changed_lines; | |
38182d90 PE |
4681 | int *old_hash = alloca (FRAME_LINES (frame) * sizeof (int)); |
4682 | int *new_hash = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4683 | int *draw_cost = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4684 | int *old_draw_cost = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 4685 | register int i; |
7df02016 | 4686 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
4687 | struct glyph_matrix *current_matrix = frame->current_matrix; |
4688 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 4689 | |
5f5c8ee5 | 4690 | if (!current_matrix) |
1088b922 | 4691 | emacs_abort (); |
4588ec20 | 4692 | |
5f5c8ee5 GM |
4693 | /* Compute hash codes of all the lines. Also calculate number of |
4694 | changed lines, number of unchanged lines at the beginning, and | |
4695 | number of unchanged lines at the end. */ | |
4588ec20 JB |
4696 | changed_lines = 0; |
4697 | unchanged_at_top = 0; | |
7df02016 KS |
4698 | unchanged_at_bottom = FRAME_LINES (frame); |
4699 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
4700 | { |
4701 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 4702 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 4703 | return 0; |
5f5c8ee5 GM |
4704 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
4705 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
4706 | { |
4707 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
4708 | new_hash[i] = old_hash[i]; | |
4709 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
4710 | draw_cost[i] = INFINITY; | |
4711 | } | |
4588ec20 | 4712 | else |
f188b3c4 | 4713 | { |
5f5c8ee5 GM |
4714 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
4715 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 4716 | } |
4588ec20 JB |
4717 | |
4718 | if (old_hash[i] != new_hash[i]) | |
4719 | { | |
4720 | changed_lines++; | |
7df02016 | 4721 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
4722 | } |
4723 | else if (i == unchanged_at_top) | |
4724 | unchanged_at_top++; | |
5f5c8ee5 | 4725 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
4726 | } |
4727 | ||
4728 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
daf01701 | 4729 | if ((!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4730 | && changed_lines < baud_rate / 2400) |
7df02016 | 4731 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
4732 | return 1; |
4733 | ||
7df02016 | 4734 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
4735 | - unchanged_at_bottom); |
4736 | ||
daf01701 | 4737 | if (FRAME_SCROLL_REGION_OK (frame)) |
4588ec20 | 4738 | free_at_end_vpos -= unchanged_at_bottom; |
daf01701 | 4739 | else if (FRAME_MEMORY_BELOW_FRAME (frame)) |
4588ec20 JB |
4740 | free_at_end_vpos = -1; |
4741 | ||
4742 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 4743 | current frame and desired frame, don't bother with i/d calc. */ |
daf01701 | 4744 | if (!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4745 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
4746 | && (window_size >= |
4747 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 4748 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
4749 | old_hash, new_hash, draw_cost))) |
4750 | return 0; | |
4751 | ||
5f5c8ee5 GM |
4752 | if (window_size < 2) |
4753 | return 0; | |
4754 | ||
502b9b64 | 4755 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 4756 | draw_cost + unchanged_at_top - 1, |
190bb91a | 4757 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
4758 | old_hash + unchanged_at_top - 1, |
4759 | new_hash + unchanged_at_top - 1, | |
4760 | free_at_end_vpos - unchanged_at_top); | |
4761 | ||
4762 | return 0; | |
4763 | } | |
4588ec20 | 4764 | |
4588ec20 | 4765 | |
5f5c8ee5 GM |
4766 | /* Count the number of blanks at the start of the vector of glyphs R |
4767 | which is LEN glyphs long. */ | |
4588ec20 | 4768 | |
4588ec20 | 4769 | static int |
971de7fb | 4770 | count_blanks (struct glyph *r, int len) |
4588ec20 | 4771 | { |
5f5c8ee5 | 4772 | int i; |
177c0ea7 | 4773 | |
5f5c8ee5 GM |
4774 | for (i = 0; i < len; ++i) |
4775 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
4776 | break; | |
4777 | ||
4778 | return i; | |
4588ec20 JB |
4779 | } |
4780 | ||
5f5c8ee5 GM |
4781 | |
4782 | /* Count the number of glyphs in common at the start of the glyph | |
4783 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
4784 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
4785 | ||
4588ec20 | 4786 | static int |
971de7fb | 4787 | count_match (struct glyph *str1, struct glyph *end1, struct glyph *str2, struct glyph *end2) |
4588ec20 | 4788 | { |
5f5c8ee5 GM |
4789 | struct glyph *p1 = str1; |
4790 | struct glyph *p2 = str2; | |
177c0ea7 | 4791 | |
5f5c8ee5 GM |
4792 | while (p1 < end1 |
4793 | && p2 < end2 | |
42186983 | 4794 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 4795 | ++p1, ++p2; |
177c0ea7 | 4796 | |
5f5c8ee5 | 4797 | return p1 - str1; |
4588ec20 JB |
4798 | } |
4799 | ||
5f5c8ee5 | 4800 | |
4588ec20 | 4801 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 4802 | |
5e617bc2 | 4803 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS ((f))]) |
4588ec20 | 4804 | |
5f5c8ee5 GM |
4805 | |
4806 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
4807 | ||
4588ec20 | 4808 | static void |
971de7fb | 4809 | update_frame_line (struct frame *f, int vpos) |
4588ec20 | 4810 | { |
5f5c8ee5 | 4811 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
4812 | int tem; |
4813 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
4814 | struct glyph_matrix *current_matrix = f->current_matrix; |
4815 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
4816 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
4817 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
59ea14cd PE |
4818 | bool must_write_whole_line_p; |
4819 | bool write_spaces_p = FRAME_MUST_WRITE_SPACES (f); | |
4820 | bool colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background | |
4821 | != FACE_TTY_DEFAULT_BG_COLOR); | |
0a894bad GM |
4822 | |
4823 | if (colored_spaces_p) | |
4824 | write_spaces_p = 1; | |
5f5c8ee5 | 4825 | |
26c63686 GM |
4826 | /* Current row not enabled means it has unknown contents. We must |
4827 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
4828 | must_write_whole_line_p = !current_row->enabled_p; |
4829 | if (must_write_whole_line_p) | |
4588ec20 | 4830 | { |
5f5c8ee5 | 4831 | obody = 0; |
4588ec20 JB |
4832 | olen = 0; |
4833 | } | |
4834 | else | |
4835 | { | |
5f5c8ee5 GM |
4836 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
4837 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 4838 | |
4cecaab8 MB |
4839 | /* Ignore trailing spaces, if we can. */ |
4840 | if (!write_spaces_p) | |
4841 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
4842 | olen--; | |
4588ec20 JB |
4843 | } |
4844 | ||
5f5c8ee5 GM |
4845 | current_row->enabled_p = 1; |
4846 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 4847 | |
5f5c8ee5 GM |
4848 | /* If desired line is empty, just clear the line. */ |
4849 | if (!desired_row->enabled_p) | |
4588ec20 JB |
4850 | { |
4851 | nlen = 0; | |
4852 | goto just_erase; | |
4853 | } | |
4854 | ||
5f5c8ee5 GM |
4855 | nbody = desired_row->glyphs[TEXT_AREA]; |
4856 | nlen = desired_row->used[TEXT_AREA]; | |
4857 | nend = nbody + nlen; | |
4858 | ||
4859 | /* If display line has unknown contents, write the whole line. */ | |
4860 | if (must_write_whole_line_p) | |
4861 | { | |
26c63686 | 4862 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 4863 | if (!write_spaces_p) |
74ca462f GM |
4864 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
4865 | --nlen; | |
4866 | ||
26c63686 | 4867 | /* Write the contents of the desired line. */ |
74ca462f | 4868 | if (nlen) |
26c63686 | 4869 | { |
385ed61f KL |
4870 | cursor_to (f, vpos, 0); |
4871 | write_glyphs (f, nbody, nlen); | |
26c63686 | 4872 | } |
177c0ea7 | 4873 | |
26c63686 GM |
4874 | /* Don't call clear_end_of_line if we already wrote the whole |
4875 | line. The cursor will not be at the right margin in that | |
4876 | case but in the line below. */ | |
7df02016 | 4877 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 | 4878 | { |
385ed61f KL |
4879 | cursor_to (f, vpos, nlen); |
4880 | clear_end_of_line (f, FRAME_TOTAL_COLS (f)); | |
26c63686 | 4881 | } |
58827478 GM |
4882 | else |
4883 | /* Make sure we are in the right row, otherwise cursor movement | |
4884 | with cmgoto might use `ch' in the wrong row. */ | |
385ed61f | 4885 | cursor_to (f, vpos, 0); |
177c0ea7 | 4886 | |
5f5c8ee5 GM |
4887 | make_current (desired_matrix, current_matrix, vpos); |
4888 | return; | |
4889 | } | |
4588ec20 JB |
4890 | |
4891 | /* Pretend trailing spaces are not there at all, | |
4892 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
4893 | if (!write_spaces_p) |
4894 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
4895 | nlen--; | |
4588ec20 JB |
4896 | |
4897 | /* If there's no i/d char, quickly do the best we can without it. */ | |
daf01701 | 4898 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
4588ec20 | 4899 | { |
5f5c8ee5 | 4900 | int i, j; |
4588ec20 | 4901 | |
5f5c8ee5 GM |
4902 | /* Find the first glyph in desired row that doesn't agree with |
4903 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
4904 | for (i = 0; i < nlen; i++) |
4905 | { | |
5f5c8ee5 | 4906 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 4907 | { |
5f5c8ee5 GM |
4908 | /* Find the end of the run of different glyphs. */ |
4909 | j = i + 1; | |
4910 | while (j < nlen | |
4911 | && (j >= olen | |
4912 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
4913 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
4914 | ++j; | |
177c0ea7 JB |
4915 | |
4916 | /* Output this run of non-matching chars. */ | |
385ed61f KL |
4917 | cursor_to (f, vpos, i); |
4918 | write_glyphs (f, nbody + i, j - i); | |
5f5c8ee5 | 4919 | i = j - 1; |
4588ec20 JB |
4920 | |
4921 | /* Now find the next non-match. */ | |
4922 | } | |
4923 | } | |
4924 | ||
4925 | /* Clear the rest of the line, or the non-clear part of it. */ | |
4926 | if (olen > nlen) | |
4927 | { | |
385ed61f KL |
4928 | cursor_to (f, vpos, nlen); |
4929 | clear_end_of_line (f, olen); | |
4588ec20 JB |
4930 | } |
4931 | ||
5f5c8ee5 GM |
4932 | /* Make current row = desired row. */ |
4933 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
4934 | return; |
4935 | } | |
4936 | ||
5f5c8ee5 GM |
4937 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
4938 | characters in a row. */ | |
4939 | ||
4588ec20 JB |
4940 | if (!olen) |
4941 | { | |
5f5c8ee5 GM |
4942 | /* If current line is blank, skip over initial spaces, if |
4943 | possible, and write the rest. */ | |
4cecaab8 | 4944 | if (write_spaces_p) |
5f5c8ee5 GM |
4945 | nsp = 0; |
4946 | else | |
4947 | nsp = count_blanks (nbody, nlen); | |
4948 | ||
4588ec20 JB |
4949 | if (nlen > nsp) |
4950 | { | |
385ed61f KL |
4951 | cursor_to (f, vpos, nsp); |
4952 | write_glyphs (f, nbody + nsp, nlen - nsp); | |
4588ec20 JB |
4953 | } |
4954 | ||
502b9b64 | 4955 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 4956 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
4957 | return; |
4958 | } | |
4959 | ||
4588ec20 | 4960 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 4961 | osp = count_blanks (obody, olen); |
4cecaab8 | 4962 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 4963 | |
5f5c8ee5 GM |
4964 | /* Compute number of matching chars starting with first non-blank. */ |
4965 | begmatch = count_match (obody + osp, obody + olen, | |
4966 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
4967 | |
4968 | /* Spaces in new match implicit space past the end of old. */ | |
4969 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 4970 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
4971 | { |
4972 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
4973 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
4974 | ++begmatch; | |
4588ec20 JB |
4975 | } |
4976 | ||
4977 | /* Avoid doing insert/delete char | |
4978 | just cause number of leading spaces differs | |
5f5c8ee5 | 4979 | when the following text does not match. */ |
4588ec20 JB |
4980 | if (begmatch == 0 && osp != nsp) |
4981 | osp = nsp = min (osp, nsp); | |
4982 | ||
4983 | /* Find matching characters at end of line */ | |
4984 | op1 = obody + olen; | |
4985 | np1 = nbody + nlen; | |
4986 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
4987 | while (op1 > op2 |
4988 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
4989 | { |
4990 | op1--; | |
4991 | np1--; | |
4992 | } | |
4993 | endmatch = obody + olen - op1; | |
4994 | ||
4588ec20 JB |
4995 | /* tem gets the distance to insert or delete. |
4996 | endmatch is how many characters we save by doing so. | |
4997 | Is it worth it? */ | |
4998 | ||
4999 | tem = (nlen - nsp) - (olen - osp); | |
5000 | if (endmatch && tem | |
daf01701 | 5001 | && (!FRAME_CHAR_INS_DEL_OK (f) |
8a56675d | 5002 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
5003 | endmatch = 0; |
5004 | ||
5005 | /* nsp - osp is the distance to insert or delete. | |
5006 | If that is nonzero, begmatch is known to be nonzero also. | |
5007 | begmatch + endmatch is how much we save by doing the ins/del. | |
5008 | Is it worth it? */ | |
5009 | ||
5010 | if (nsp != osp | |
daf01701 | 5011 | && (!FRAME_CHAR_INS_DEL_OK (f) |
c363a1d6 | 5012 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
5013 | { |
5014 | begmatch = 0; | |
5015 | endmatch = 0; | |
5016 | osp = nsp = min (osp, nsp); | |
5017 | } | |
5018 | ||
5019 | /* Now go through the line, inserting, writing and | |
5020 | deleting as appropriate. */ | |
5021 | ||
5022 | if (osp > nsp) | |
5023 | { | |
385ed61f KL |
5024 | cursor_to (f, vpos, nsp); |
5025 | delete_glyphs (f, osp - nsp); | |
4588ec20 JB |
5026 | } |
5027 | else if (nsp > osp) | |
5028 | { | |
5029 | /* If going to delete chars later in line | |
5030 | and insert earlier in the line, | |
5031 | must delete first to avoid losing data in the insert */ | |
5032 | if (endmatch && nlen < olen + nsp - osp) | |
5033 | { | |
385ed61f KL |
5034 | cursor_to (f, vpos, nlen - endmatch + osp - nsp); |
5035 | delete_glyphs (f, olen + nsp - osp - nlen); | |
4588ec20 JB |
5036 | olen = nlen - (nsp - osp); |
5037 | } | |
385ed61f KL |
5038 | cursor_to (f, vpos, osp); |
5039 | insert_glyphs (f, 0, nsp - osp); | |
4588ec20 JB |
5040 | } |
5041 | olen += nsp - osp; | |
5042 | ||
5043 | tem = nsp + begmatch + endmatch; | |
5044 | if (nlen != tem || olen != tem) | |
5045 | { | |
4588ec20 JB |
5046 | if (!endmatch || nlen == olen) |
5047 | { | |
c363a1d6 GM |
5048 | /* If new text being written reaches right margin, there is |
5049 | no need to do clear-to-eol at the end of this function | |
5050 | (and it would not be safe, since cursor is not going to | |
5051 | be "at the margin" after the text is done). */ | |
7df02016 | 5052 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 5053 | olen = 0; |
c363a1d6 GM |
5054 | |
5055 | /* Function write_glyphs is prepared to do nothing | |
5056 | if passed a length <= 0. Check it here to avoid | |
5057 | unnecessary cursor movement. */ | |
5058 | if (nlen - tem > 0) | |
5059 | { | |
385ed61f KL |
5060 | cursor_to (f, vpos, nsp + begmatch); |
5061 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
c363a1d6 | 5062 | } |
4588ec20 JB |
5063 | } |
5064 | else if (nlen > olen) | |
5065 | { | |
24e86043 KH |
5066 | /* Here, we used to have the following simple code: |
5067 | ---------------------------------------- | |
5068 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
5069 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
5070 | ---------------------------------------- | |
5071 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
5072 | is a padding glyph. */ | |
5073 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
5074 | int del; | |
5f5c8ee5 | 5075 | |
385ed61f | 5076 | cursor_to (f, vpos, nsp + begmatch); |
177c0ea7 | 5077 | |
5f5c8ee5 | 5078 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
5079 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
5080 | out--; | |
385ed61f | 5081 | write_glyphs (f, nbody + nsp + begmatch, out); |
177c0ea7 | 5082 | |
5f5c8ee5 GM |
5083 | /* If we left columns to be overwritten, we must delete them. */ |
5084 | del = olen - tem - out; | |
c363a1d6 | 5085 | if (del > 0) |
385ed61f | 5086 | delete_glyphs (f, del); |
177c0ea7 | 5087 | |
5f5c8ee5 | 5088 | /* At last, we insert columns not yet written out. */ |
385ed61f | 5089 | insert_glyphs (f, nbody + nsp + begmatch + out, nlen - olen + del); |
5f5c8ee5 GM |
5090 | olen = nlen; |
5091 | } | |
5092 | else if (olen > nlen) | |
5093 | { | |
385ed61f KL |
5094 | cursor_to (f, vpos, nsp + begmatch); |
5095 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
5096 | delete_glyphs (f, olen - nlen); | |
5f5c8ee5 GM |
5097 | olen = nlen; |
5098 | } | |
bd9e3e75 | 5099 | } |
5f5c8ee5 GM |
5100 | |
5101 | just_erase: | |
5102 | /* If any unerased characters remain after the new line, erase them. */ | |
5103 | if (olen > nlen) | |
078b3696 | 5104 | { |
385ed61f KL |
5105 | cursor_to (f, vpos, nlen); |
5106 | clear_end_of_line (f, olen); | |
078b3696 | 5107 | } |
5f5c8ee5 GM |
5108 | |
5109 | /* Exchange contents between current_frame and new_frame. */ | |
5110 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5111 | } |
5f5c8ee5 GM |
5112 | |
5113 | ||
078b3696 | 5114 | \f |
5f5c8ee5 GM |
5115 | /*********************************************************************** |
5116 | X/Y Position -> Buffer Position | |
5117 | ***********************************************************************/ | |
5118 | ||
a1b0a6db | 5119 | /* Determine what's under window-relative pixel position (*X, *Y). |
2396cbba | 5120 | Return the OBJECT (string or buffer) that's there. |
6b61353c | 5121 | Return in *POS the position in that object. |
2396cbba EZ |
5122 | Adjust *X and *Y to character positions. |
5123 | Return in *DX and *DY the pixel coordinates of the click, | |
5124 | relative to the top left corner of OBJECT, or relative to | |
5125 | the top left corner of the character glyph at (*X, *Y) | |
5126 | if OBJECT is nil. | |
5127 | Return WIDTH and HEIGHT of the object at (*X, *Y), or zero | |
5128 | if the coordinates point to an empty area of the display. */ | |
5f5c8ee5 | 5129 | |
6b61353c | 5130 | Lisp_Object |
971de7fb | 5131 | 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 | 5132 | { |
5f5c8ee5 | 5133 | struct it it; |
707ea971 | 5134 | Lisp_Object old_current_buffer = Fcurrent_buffer (); |
5f5c8ee5 | 5135 | struct text_pos startp; |
6b61353c KH |
5136 | Lisp_Object string; |
5137 | struct glyph_row *row; | |
cedd7cd9 KS |
5138 | #ifdef HAVE_WINDOW_SYSTEM |
5139 | struct image *img = 0; | |
5140 | #endif | |
2396cbba | 5141 | int x0, x1, to_x; |
57b3e30b | 5142 | void *itdata = NULL; |
5f5c8ee5 | 5143 | |
707ea971 CY |
5144 | /* We used to set current_buffer directly here, but that does the |
5145 | wrong thing with `face-remapping-alist' (bug#2044). */ | |
e74aeda8 | 5146 | Fset_buffer (w->contents); |
57b3e30b | 5147 | itdata = bidi_shelve_cache (); |
cf91889a | 5148 | CLIP_TEXT_POS_FROM_MARKER (startp, w->start); |
5f5c8ee5 | 5149 | start_display (&it, w, startp); |
352ec8ff EZ |
5150 | /* start_display takes into account the header-line row, but IT's |
5151 | vpos still counts from the glyph row that includes the window's | |
5152 | start position. Adjust for a possible header-line row. */ | |
59ea14cd | 5153 | it.vpos += WINDOW_WANTS_HEADER_LINE_P (w); |
177c0ea7 | 5154 | |
9173a8fb | 5155 | x0 = *x; |
2396cbba EZ |
5156 | |
5157 | /* First, move to the beginning of the row corresponding to *Y. We | |
5158 | need to be in that row to get the correct value of base paragraph | |
40629f17 | 5159 | direction for the text at (*X, *Y). */ |
2396cbba EZ |
5160 | move_it_to (&it, -1, 0, *y, -1, MOVE_TO_X | MOVE_TO_Y); |
5161 | ||
5162 | /* TO_X is the pixel position that the iterator will compute for the | |
40629f17 EZ |
5163 | glyph at *X. We add it.first_visible_x because iterator |
5164 | positions include the hscroll. */ | |
2396cbba EZ |
5165 | to_x = x0 + it.first_visible_x; |
5166 | if (it.bidi_it.paragraph_dir == R2L) | |
5167 | /* For lines in an R2L paragraph, we need to mirror TO_X wrt the | |
5168 | text area. This is because the iterator, even in R2L | |
5169 | paragraphs, delivers glyphs as if they started at the left | |
5170 | margin of the window. (When we actually produce glyphs for | |
5171 | display, we reverse their order in PRODUCE_GLYPHS, but the | |
5172 | iterator doesn't know about that.) The following line adjusts | |
5173 | the pixel position to the iterator geometry, which is what | |
40629f17 EZ |
5174 | move_it_* routines use. (The -1 is because in a window whose |
5175 | text-area width is W, the rightmost pixel position is W-1, and | |
5176 | it should be mirrored into zero pixel position.) */ | |
5177 | to_x = window_box_width (w, TEXT_AREA) - to_x - 1; | |
5178 | ||
5179 | /* Now move horizontally in the row to the glyph under *X. Second | |
5180 | argument is ZV to prevent move_it_in_display_line from matching | |
5181 | based on buffer positions. */ | |
2396cbba | 5182 | move_it_in_display_line (&it, ZV, to_x, MOVE_TO_X); |
35928349 | 5183 | bidi_unshelve_cache (itdata, 0); |
177c0ea7 | 5184 | |
707ea971 | 5185 | Fset_buffer (old_current_buffer); |
a1b0a6db | 5186 | |
6b61353c KH |
5187 | *dx = x0 + it.first_visible_x - it.current_x; |
5188 | *dy = *y - it.current_y; | |
5189 | ||
e74aeda8 | 5190 | string = w->contents; |
6b61353c KH |
5191 | if (STRINGP (it.string)) |
5192 | string = it.string; | |
a1b0a6db | 5193 | *pos = it.current; |
86282aab KH |
5194 | if (it.what == IT_COMPOSITION |
5195 | && it.cmp_it.nchars > 1 | |
5196 | && it.cmp_it.reversed_p) | |
5197 | { | |
5198 | /* The current display element is a grapheme cluster in a | |
5199 | composition. In that case, we need the position of the first | |
5200 | character of the cluster. But, as it.cmp_it.reversed_p is 1, | |
5201 | it.current points to the last character of the cluster, thus | |
5202 | we must move back to the first character of the same | |
5203 | cluster. */ | |
5204 | CHARPOS (pos->pos) -= it.cmp_it.nchars - 1; | |
5205 | if (STRINGP (it.string)) | |
5206 | BYTEPOS (pos->pos) = string_char_to_byte (string, CHARPOS (pos->pos)); | |
5207 | else | |
e74aeda8 | 5208 | BYTEPOS (pos->pos) = buf_charpos_to_bytepos (XBUFFER (w->contents), |
425cc014 | 5209 | CHARPOS (pos->pos)); |
86282aab | 5210 | } |
6b61353c KH |
5211 | |
5212 | #ifdef HAVE_WINDOW_SYSTEM | |
5213 | if (it.what == IT_IMAGE) | |
5214 | { | |
6b61353c KH |
5215 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5216 | && !NILP (img->spec)) | |
5217 | *object = img->spec; | |
5218 | } | |
5219 | #endif | |
5220 | ||
b70d98e1 KS |
5221 | if (it.vpos < w->current_matrix->nrows |
5222 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5223 | row->enabled_p)) | |
6b61353c KH |
5224 | { |
5225 | if (it.hpos < row->used[TEXT_AREA]) | |
5226 | { | |
5227 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6b61353c | 5228 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5229 | if (img) |
5230 | { | |
5231 | *dy -= row->ascent - glyph->ascent; | |
4be9765d KH |
5232 | *dx += glyph->slice.img.x; |
5233 | *dy += glyph->slice.img.y; | |
cedd7cd9 KS |
5234 | /* Image slices positions are still relative to the entire image */ |
5235 | *width = img->width; | |
5236 | *height = img->height; | |
5237 | } | |
5238 | else | |
6b61353c | 5239 | #endif |
cedd7cd9 KS |
5240 | { |
5241 | *width = glyph->pixel_width; | |
5242 | *height = glyph->ascent + glyph->descent; | |
5243 | } | |
6b61353c KH |
5244 | } |
5245 | else | |
5246 | { | |
5247 | *width = 0; | |
5248 | *height = row->height; | |
5249 | } | |
5250 | } | |
5251 | else | |
5252 | { | |
5253 | *width = *height = 0; | |
5254 | } | |
5255 | ||
5256 | /* Add extra (default width) columns if clicked after EOL. */ | |
5e617bc2 | 5257 | x1 = max (0, it.current_x + it.pixel_width - it.first_visible_x); |
6b61353c KH |
5258 | if (x0 > x1) |
5259 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5260 | ||
5261 | *x = it.hpos; | |
5262 | *y = it.vpos; | |
5263 | ||
5264 | return string; | |
5f5c8ee5 | 5265 | } |
4588ec20 | 5266 | |
5f5c8ee5 GM |
5267 | |
5268 | /* Value is the string under window-relative coordinates X/Y in the | |
6b61353c KH |
5269 | mode line or header line (PART says which) of window W, or nil if none. |
5270 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
5271 | |
5272 | Lisp_Object | |
ace1712c | 5273 | mode_line_string (struct window *w, enum window_part part, |
d311d28c | 5274 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5275 | int *dx, int *dy, int *width, int *height) |
5f5c8ee5 GM |
5276 | { |
5277 | struct glyph_row *row; | |
5278 | struct glyph *glyph, *end; | |
6b61353c | 5279 | int x0, y0; |
5f5c8ee5 GM |
5280 | Lisp_Object string = Qnil; |
5281 | ||
641bdbf3 | 5282 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
5283 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
5284 | else | |
045dee35 | 5285 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
6b61353c KH |
5286 | y0 = *y - row->y; |
5287 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
5f5c8ee5 GM |
5288 | |
5289 | if (row->mode_line_p && row->enabled_p) | |
4588ec20 | 5290 | { |
5f5c8ee5 GM |
5291 | /* Find the glyph under X. If we find one with a string object, |
5292 | it's the one we were looking for. */ | |
5293 | glyph = row->glyphs[TEXT_AREA]; | |
5294 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 5295 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5296 | x0 -= glyph->pixel_width; |
5297 | *x = glyph - row->glyphs[TEXT_AREA]; | |
5298 | if (glyph < end) | |
5299 | { | |
5300 | string = glyph->object; | |
5301 | *charpos = glyph->charpos; | |
5302 | *width = glyph->pixel_width; | |
5303 | *height = glyph->ascent + glyph->descent; | |
5304 | #ifdef HAVE_WINDOW_SYSTEM | |
5305 | if (glyph->type == IMAGE_GLYPH) | |
5306 | { | |
5307 | struct image *img; | |
5308 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5309 | if (img != NULL) | |
5310 | *object = img->spec; | |
5311 | y0 -= row->ascent - glyph->ascent; | |
5312 | } | |
5313 | #endif | |
5314 | } | |
5315 | else | |
5316 | { | |
5317 | /* Add extra (default width) columns if clicked after EOL. */ | |
5318 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5319 | *width = 0; | |
5320 | *height = row->height; | |
5321 | } | |
5322 | } | |
5323 | else | |
5324 | { | |
5325 | *x = 0; | |
5326 | x0 = 0; | |
5327 | *width = *height = 0; | |
4588ec20 | 5328 | } |
5f5c8ee5 | 5329 | |
6b61353c KH |
5330 | *dx = x0; |
5331 | *dy = y0; | |
5332 | ||
5f5c8ee5 | 5333 | return string; |
4588ec20 | 5334 | } |
5f5c8ee5 GM |
5335 | |
5336 | ||
db1db309 GM |
5337 | /* Value is the string under window-relative coordinates X/Y in either |
5338 | marginal area, or nil if none. *CHARPOS is set to the position in | |
5339 | the string returned. */ | |
5340 | ||
5341 | Lisp_Object | |
ace1712c | 5342 | marginal_area_string (struct window *w, enum window_part part, |
d311d28c | 5343 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5344 | int *dx, int *dy, int *width, int *height) |
db1db309 GM |
5345 | { |
5346 | struct glyph_row *row = w->current_matrix->rows; | |
5347 | struct glyph *glyph, *end; | |
6b61353c | 5348 | int x0, y0, i, wy = *y; |
641bdbf3 | 5349 | int area; |
db1db309 GM |
5350 | Lisp_Object string = Qnil; |
5351 | ||
641bdbf3 | 5352 | if (part == ON_LEFT_MARGIN) |
db1db309 | 5353 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 5354 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
5355 | area = RIGHT_MARGIN_AREA; |
5356 | else | |
1088b922 | 5357 | emacs_abort (); |
db1db309 GM |
5358 | |
5359 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
5360 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
5361 | break; | |
6b61353c KH |
5362 | y0 = *y - row->y; |
5363 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
db1db309 GM |
5364 | |
5365 | if (row->enabled_p) | |
5366 | { | |
5367 | /* Find the glyph under X. If we find one with a string object, | |
5368 | it's the one we were looking for. */ | |
db1db309 | 5369 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 5370 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5371 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5372 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) |
5373 | + window_box_width (w, LEFT_MARGIN_AREA) | |
5374 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 5375 | else |
7df02016 | 5376 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5377 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5378 | : 0); |
5379 | ||
6b61353c KH |
5380 | glyph = row->glyphs[area]; |
5381 | end = glyph + row->used[area]; | |
cfde341f | 5382 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5383 | x0 -= glyph->pixel_width; |
5384 | *x = glyph - row->glyphs[area]; | |
5385 | if (glyph < end) | |
5386 | { | |
5387 | string = glyph->object; | |
5388 | *charpos = glyph->charpos; | |
5389 | *width = glyph->pixel_width; | |
5390 | *height = glyph->ascent + glyph->descent; | |
5391 | #ifdef HAVE_WINDOW_SYSTEM | |
5392 | if (glyph->type == IMAGE_GLYPH) | |
5393 | { | |
5394 | struct image *img; | |
5395 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5396 | if (img != NULL) | |
5397 | *object = img->spec; | |
5398 | y0 -= row->ascent - glyph->ascent; | |
4be9765d KH |
5399 | x0 += glyph->slice.img.x; |
5400 | y0 += glyph->slice.img.y; | |
6b61353c KH |
5401 | } |
5402 | #endif | |
5403 | } | |
5404 | else | |
5405 | { | |
5406 | /* Add extra (default width) columns if clicked after EOL. */ | |
5407 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5408 | *width = 0; | |
5409 | *height = row->height; | |
5410 | } | |
db1db309 | 5411 | } |
6b61353c KH |
5412 | else |
5413 | { | |
5414 | x0 = 0; | |
5415 | *x = 0; | |
5416 | *width = *height = 0; | |
5417 | } | |
5418 | ||
5419 | *dx = x0; | |
5420 | *dy = y0; | |
db1db309 GM |
5421 | |
5422 | return string; | |
5423 | } | |
5424 | ||
5425 | ||
5f5c8ee5 GM |
5426 | /*********************************************************************** |
5427 | Changing Frame Sizes | |
5428 | ***********************************************************************/ | |
4588ec20 JB |
5429 | |
5430 | #ifdef SIGWINCH | |
5f5c8ee5 | 5431 | |
20ef56db PE |
5432 | static void deliver_window_change_signal (int); |
5433 | ||
9af30bdf | 5434 | static void |
20ef56db | 5435 | handle_window_change_signal (int sig) |
4588ec20 JB |
5436 | { |
5437 | int width, height; | |
28d7d09f | 5438 | struct tty_display_info *tty; |
4d553a13 | 5439 | |
9628b887 KL |
5440 | /* The frame size change obviously applies to a single |
5441 | termcap-controlled terminal, but we can't decide which. | |
5442 | Therefore, we resize the frames corresponding to each tty. | |
9628b887 KL |
5443 | */ |
5444 | for (tty = tty_list; tty; tty = tty->next) { | |
4588ec20 | 5445 | |
0a125897 KL |
5446 | if (! tty->term_initted) |
5447 | continue; | |
4588ec20 | 5448 | |
db878925 DN |
5449 | /* Suspended tty frames have tty->input == NULL avoid trying to |
5450 | use it. */ | |
5451 | if (!tty->input) | |
5452 | continue; | |
5453 | ||
0b0d3e0b | 5454 | get_tty_size (fileno (tty->input), &width, &height); |
3fc809e2 | 5455 | |
bedeffcf | 5456 | if (width > 5 && height > 2) { |
9628b887 | 5457 | Lisp_Object tail, frame; |
3fc809e2 | 5458 | |
9628b887 | 5459 | FOR_EACH_FRAME (tail, frame) |
4d553a13 KL |
5460 | if (FRAME_TERMCAP_P (XFRAME (frame)) && FRAME_TTY (XFRAME (frame)) == tty) |
5461 | /* Record the new sizes, but don't reallocate the data | |
5462 | structures now. Let that be done later outside of the | |
5463 | signal handler. */ | |
5464 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); | |
9628b887 | 5465 | } |
4588ec20 | 5466 | } |
20ef56db | 5467 | } |
3fc809e2 | 5468 | |
20ef56db PE |
5469 | static void |
5470 | deliver_window_change_signal (int sig) | |
5471 | { | |
4d7e6e51 | 5472 | deliver_process_signal (sig, handle_window_change_signal); |
4588ec20 JB |
5473 | } |
5474 | #endif /* SIGWINCH */ | |
5475 | ||
5476 | ||
59ea14cd PE |
5477 | /* Do any change in frame size that was requested by a signal. |
5478 | SAFE means this function is called from a place where it is | |
5479 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 5480 | |
dfcf069d | 5481 | void |
59ea14cd | 5482 | do_pending_window_change (bool safe) |
4588ec20 | 5483 | { |
20ef56db | 5484 | /* If window change signal handler should have run before, run it now. */ |
b96fd3e8 GM |
5485 | if (redisplaying_p && !safe) |
5486 | return; | |
177c0ea7 | 5487 | |
4588ec20 JB |
5488 | while (delayed_size_change) |
5489 | { | |
35f56f96 | 5490 | Lisp_Object tail, frame; |
4588ec20 JB |
5491 | |
5492 | delayed_size_change = 0; | |
5493 | ||
35f56f96 | 5494 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5495 | { |
5f5c8ee5 | 5496 | struct frame *f = XFRAME (frame); |
35f56f96 | 5497 | |
7df02016 KS |
5498 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
5499 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
5500 | 0, 0, safe); | |
4588ec20 JB |
5501 | } |
5502 | } | |
5503 | } | |
5504 | ||
5505 | ||
502b9b64 | 5506 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 5507 | indicate no change is to take place. |
4588ec20 | 5508 | |
59ea14cd PE |
5509 | If DELAY, assume we're being called from a signal handler, and |
5510 | queue the change for later - perhaps the next redisplay. | |
5511 | Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
5512 | from a signal handler. |
5513 | ||
59ea14cd | 5514 | SAFE means this function is called from a place where it's |
b96fd3e8 | 5515 | safe to change frame sizes while a redisplay is in progress. */ |
b6a65ac2 | 5516 | |
dfcf069d | 5517 | void |
59ea14cd PE |
5518 | change_frame_size (struct frame *f, int newheight, int newwidth, |
5519 | bool pretend, bool delay, bool safe) | |
45140e01 RS |
5520 | { |
5521 | Lisp_Object tail, frame; | |
3826ea1a | 5522 | |
9628b887 | 5523 | if (FRAME_MSDOS_P (f)) |
45140e01 | 5524 | { |
9628b887 KL |
5525 | /* On MS-DOS, all frames use the same screen, so a change in |
5526 | size affects all frames. Termcap now supports multiple | |
5527 | ttys. */ | |
45140e01 | 5528 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 5529 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 5530 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 5531 | pretend, delay, safe); |
45140e01 RS |
5532 | } |
5533 | else | |
b96fd3e8 | 5534 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
5535 | } |
5536 | ||
5537 | static void | |
59ea14cd PE |
5538 | change_frame_size_1 (struct frame *f, int newheight, int newwidth, |
5539 | bool pretend, bool delay, bool safe) | |
4588ec20 | 5540 | { |
7df02016 | 5541 | int new_frame_total_cols; |
d311d28c | 5542 | ptrdiff_t count = SPECPDL_INDEX (); |
3826ea1a | 5543 | |
4588ec20 | 5544 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 5545 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 5546 | { |
7df02016 KS |
5547 | f->new_text_lines = newheight; |
5548 | f->new_text_cols = newwidth; | |
4588ec20 JB |
5549 | delayed_size_change = 1; |
5550 | return; | |
5551 | } | |
5552 | ||
502b9b64 | 5553 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
5554 | f->new_text_lines = 0; |
5555 | f->new_text_cols = 0; | |
b6a65ac2 | 5556 | |
08f7aa3e | 5557 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 5558 | if (newheight == 0) |
7df02016 | 5559 | newheight = FRAME_LINES (f); |
ae19c6f2 | 5560 | if (newwidth == 0) |
7df02016 | 5561 | newwidth = FRAME_COLS (f); |
3826ea1a | 5562 | |
3b95a6f9 | 5563 | /* Compute width of windows in F. */ |
b6a65ac2 | 5564 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 5565 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 | 5566 | |
3b95a6f9 MR |
5567 | /* This is the width of the frame with vertical scroll bars and fringe |
5568 | columns. Do this after rounding - see discussion of bug#9723. */ | |
5569 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); | |
5570 | ||
b6a65ac2 | 5571 | /* If we're not changing the frame size, quit now. */ |
3b95a6f9 MR |
5572 | /* Frame width may be unchanged but the text portion may change, for |
5573 | example, fullscreen and remove/add scroll bar. */ | |
7df02016 | 5574 | if (newheight == FRAME_LINES (f) |
3b95a6f9 MR |
5575 | /* Text portion unchanged? */ |
5576 | && newwidth == FRAME_COLS (f) | |
5577 | /* Frame width unchanged? */ | |
5578 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) | |
4588ec20 JB |
5579 | return; |
5580 | ||
4d7e6e51 | 5581 | block_input (); |
cbb95688 | 5582 | |
886a8a6c KH |
5583 | #ifdef MSDOS |
5584 | /* We only can set screen dimensions to certain values supported | |
5585 | by our video hardware. Try to find the smallest size greater | |
5586 | or equal to the requested dimensions. */ | |
5587 | dos_set_window_size (&newheight, &newwidth); | |
5588 | #endif | |
5589 | ||
7df02016 | 5590 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 5591 | { |
562dd5e9 | 5592 | resize_frame_windows (f, newheight, 0); |
b6a65ac2 | 5593 | |
48e482e6 EZ |
5594 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5595 | manipulating video hardware. */ | |
5596 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5597 | FrameRows (FRAME_TTY (f)) = newheight; |
4588ec20 JB |
5598 | } |
5599 | ||
7df02016 | 5600 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 5601 | { |
562dd5e9 | 5602 | resize_frame_windows (f, new_frame_total_cols, 1); |
4588ec20 | 5603 | |
48e482e6 EZ |
5604 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5605 | manipulating video hardware. */ | |
5606 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5607 | FrameCols (FRAME_TTY (f)) = newwidth; |
5f5c8ee5 | 5608 | |
9ea173e8 | 5609 | if (WINDOWP (f->tool_bar_window)) |
5f24fa51 | 5610 | XWINDOW (f->tool_bar_window)->total_cols = newwidth; |
4588ec20 JB |
5611 | } |
5612 | ||
7df02016 KS |
5613 | FRAME_LINES (f) = newheight; |
5614 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 5615 | |
5f5c8ee5 GM |
5616 | { |
5617 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
5618 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 5619 | |
5f5c8ee5 GM |
5620 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
5621 | &text_area_height); | |
5622 | if (w->cursor.x >= text_area_x + text_area_width) | |
5623 | w->cursor.hpos = w->cursor.x = 0; | |
5624 | if (w->cursor.y >= text_area_y + text_area_height) | |
5625 | w->cursor.vpos = w->cursor.y = 0; | |
5626 | } | |
986e61b8 | 5627 | |
5f5c8ee5 | 5628 | adjust_glyphs (f); |
5f5c8ee5 | 5629 | calculate_costs (f); |
cb02fa39 GM |
5630 | SET_FRAME_GARBAGED (f); |
5631 | f->resized_p = 1; | |
97cf50e7 | 5632 | |
4d7e6e51 | 5633 | unblock_input (); |
61730a69 | 5634 | |
66322887 | 5635 | record_unwind_current_buffer (); |
e523f7e5 | 5636 | |
ef264c42 | 5637 | run_window_configuration_change_hook (f); |
e523f7e5 RS |
5638 | |
5639 | unbind_to (count, Qnil); | |
4588ec20 | 5640 | } |
5f5c8ee5 GM |
5641 | |
5642 | ||
4588ec20 | 5643 | \f |
5f5c8ee5 GM |
5644 | /*********************************************************************** |
5645 | Terminal Related Lisp Functions | |
5646 | ***********************************************************************/ | |
5647 | ||
5648 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 5649 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
5650 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
5651 | FILE = nil means just close any termscript file currently open. */) | |
5842a27b | 5652 | (Lisp_Object file) |
5f5c8ee5 | 5653 | { |
0b0d3e0b KL |
5654 | struct tty_display_info *tty; |
5655 | ||
7d2f1216 EZ |
5656 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ()) |
5657 | && ! FRAME_MSDOS_P (SELECTED_FRAME ())) | |
0b0d3e0b KL |
5658 | error ("Current frame is not on a tty device"); |
5659 | ||
5660 | tty = CURTTY (); | |
5661 | ||
5662 | if (tty->termscript != 0) | |
406af475 PE |
5663 | { |
5664 | block_input (); | |
5665 | fclose (tty->termscript); | |
5666 | tty->termscript = 0; | |
5667 | unblock_input (); | |
5668 | } | |
5f5c8ee5 GM |
5669 | |
5670 | if (! NILP (file)) | |
5671 | { | |
5672 | file = Fexpand_file_name (file, Qnil); | |
406af475 | 5673 | tty->termscript = emacs_fopen (SSDATA (file), "w"); |
0b0d3e0b | 5674 | if (tty->termscript == 0) |
a9757f6a | 5675 | report_file_error ("Opening termscript", file); |
5f5c8ee5 GM |
5676 | } |
5677 | return Qnil; | |
5678 | } | |
5679 | ||
5680 | ||
4588ec20 | 5681 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
62af879c | 5682 | Ssend_string_to_terminal, 1, 2, 0, |
7ee72033 | 5683 | doc: /* Send STRING to the terminal without alteration. |
62af879c KL |
5684 | Control characters in STRING will have terminal-dependent effects. |
5685 | ||
6ed8eeff | 5686 | Optional parameter TERMINAL specifies the tty terminal device to use. |
558759e4 AM |
5687 | It may be a terminal object, a frame, or nil for the terminal used by |
5688 | the currently selected frame. In batch mode, STRING is sent to stdout | |
5689 | when TERMINAL is nil. */) | |
5842a27b | 5690 | (Lisp_Object string, Lisp_Object terminal) |
4588ec20 | 5691 | { |
7cef7ce3 SM |
5692 | struct terminal *t = get_terminal (terminal, 1); |
5693 | FILE *out; | |
0b0d3e0b | 5694 | |
94f3db62 | 5695 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 5696 | CHECK_STRING (string); |
4d7e6e51 | 5697 | block_input (); |
0b0d3e0b | 5698 | |
6ed8eeff KL |
5699 | if (!t) |
5700 | error ("Unknown terminal device"); | |
0b0d3e0b | 5701 | |
7cef7ce3 SM |
5702 | if (t->type == output_initial) |
5703 | out = stdout; | |
5704 | else if (t->type != output_termcap && t->type != output_msdos_raw) | |
5705 | error ("Device %d is not a termcap terminal device", t->id); | |
5706 | else | |
5707 | { | |
5708 | struct tty_display_info *tty = t->display_info.tty; | |
3fc809e2 | 5709 | |
7cef7ce3 SM |
5710 | if (! tty->output) |
5711 | error ("Terminal is currently suspended"); | |
cecfdea6 | 5712 | |
7cef7ce3 SM |
5713 | if (tty->termscript) |
5714 | { | |
5715 | fwrite (SDATA (string), 1, SBYTES (string), tty->termscript); | |
5716 | fflush (tty->termscript); | |
5717 | } | |
5718 | out = tty->output; | |
4588ec20 | 5719 | } |
7cef7ce3 SM |
5720 | fwrite (SDATA (string), 1, SBYTES (string), out); |
5721 | fflush (out); | |
4d7e6e51 | 5722 | unblock_input (); |
4588ec20 JB |
5723 | return Qnil; |
5724 | } | |
5725 | ||
5f5c8ee5 | 5726 | |
a7ca3326 | 5727 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 5728 | doc: /* Beep, or flash the screen. |
228299fa | 5729 | Also, unless an argument is given, |
7ee72033 | 5730 | terminate any keyboard macro currently executing. */) |
5842a27b | 5731 | (Lisp_Object arg) |
4588ec20 | 5732 | { |
efb859b4 | 5733 | if (!NILP (arg)) |
4588ec20 | 5734 | { |
7fa788da RS |
5735 | if (noninteractive) |
5736 | putchar (07); | |
5737 | else | |
385ed61f | 5738 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5739 | } |
5740 | else | |
5741 | bitch_at_user (); | |
5742 | ||
5743 | return Qnil; | |
5744 | } | |
5745 | ||
dfcf069d | 5746 | void |
971de7fb | 5747 | bitch_at_user (void) |
4588ec20 JB |
5748 | { |
5749 | if (noninteractive) | |
5750 | putchar (07); | |
5f5c8ee5 | 5751 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
81519fd2 SM |
5752 | { |
5753 | const char *msg | |
5754 | = "Keyboard macro terminated by a command ringing the bell"; | |
6c6f1994 | 5755 | Fsignal (Quser_error, list1 (build_string (msg))); |
81519fd2 | 5756 | } |
4588ec20 | 5757 | else |
385ed61f | 5758 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5759 | } |
5760 | ||
5f5c8ee5 GM |
5761 | |
5762 | \f | |
5763 | /*********************************************************************** | |
5764 | Sleeping, Waiting | |
5765 | ***********************************************************************/ | |
5766 | ||
a7ca3326 | 5767 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 5768 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
5769 | SECONDS may be a floating-point value, meaning that you can wait for a |
5770 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
d35af63c | 5771 | additional wait period, in milliseconds; this is for backwards compatibility. |
7ee72033 | 5772 | \(Not all operating systems support waiting for a fraction of a second.) */) |
5842a27b | 5773 | (Lisp_Object seconds, Lisp_Object milliseconds) |
4588ec20 | 5774 | { |
d311d28c | 5775 | double duration = extract_float (seconds); |
4588ec20 | 5776 | |
d311d28c PE |
5777 | if (!NILP (milliseconds)) |
5778 | { | |
5779 | CHECK_NUMBER (milliseconds); | |
5780 | duration += XINT (milliseconds) / 1000.0; | |
5781 | } | |
b07646f5 | 5782 | |
908589fd | 5783 | if (duration > 0) |
d35af63c | 5784 | { |
43aac990 PE |
5785 | struct timespec t = dtotimespec (duration); |
5786 | wait_reading_process_output (min (t.tv_sec, WAIT_READING_MAX), | |
5787 | t.tv_nsec, 0, 0, Qnil, NULL, 0); | |
d35af63c | 5788 | } |
4588ec20 JB |
5789 | |
5790 | return Qnil; | |
5791 | } | |
5792 | ||
5f5c8ee5 | 5793 | |
dcd1ca45 | 5794 | /* This is just like wait_reading_process_output, except that |
902b9b6d | 5795 | it does redisplay. |
f76475ad | 5796 | |
2bcac766 CY |
5797 | TIMEOUT is number of seconds to wait (float or integer), |
5798 | or t to wait forever. | |
59ea14cd | 5799 | READING is true if reading input. |
9fa1de30 PE |
5800 | If DISPLAY_OPTION is >0 display process output while waiting. |
5801 | If DISPLAY_OPTION is >1 perform an initial redisplay before waiting. | |
902b9b6d | 5802 | */ |
4588ec20 | 5803 | |
f76475ad | 5804 | Lisp_Object |
9fa1de30 | 5805 | sit_for (Lisp_Object timeout, bool reading, int display_option) |
f76475ad | 5806 | { |
d35af63c PE |
5807 | intmax_t sec; |
5808 | int nsec; | |
9fa1de30 | 5809 | bool do_display = display_option > 0; |
f222369e | 5810 | |
902b9b6d | 5811 | swallow_events (do_display); |
ccddf474 | 5812 | |
902b9b6d | 5813 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 5814 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 5815 | return Qnil; |
4588ec20 | 5816 | |
9fa1de30 | 5817 | if (display_option > 1) |
902b9b6d KS |
5818 | redisplay_preserve_echo_area (2); |
5819 | ||
d35af63c | 5820 | if (INTEGERP (timeout)) |
2bcac766 | 5821 | { |
d35af63c | 5822 | sec = XINT (timeout); |
908589fd | 5823 | if (sec <= 0) |
d35af63c PE |
5824 | return Qt; |
5825 | nsec = 0; | |
2bcac766 | 5826 | } |
d35af63c | 5827 | else if (FLOATP (timeout)) |
d311d28c | 5828 | { |
d35af63c | 5829 | double seconds = XFLOAT_DATA (timeout); |
7216e43b | 5830 | if (! (0 < seconds)) |
d311d28c | 5831 | return Qt; |
d35af63c PE |
5832 | else |
5833 | { | |
43aac990 PE |
5834 | struct timespec t = dtotimespec (seconds); |
5835 | sec = min (t.tv_sec, WAIT_READING_MAX); | |
5836 | nsec = t.tv_nsec; | |
d35af63c | 5837 | } |
d311d28c | 5838 | } |
d35af63c PE |
5839 | else if (EQ (timeout, Qt)) |
5840 | { | |
5841 | sec = 0; | |
5842 | nsec = 0; | |
d311d28c | 5843 | } |
d35af63c PE |
5844 | else |
5845 | wrong_type_argument (Qnumberp, timeout); | |
dfdb645c | 5846 | |
dfdb645c | 5847 | |
4a4bbad2 | 5848 | #ifdef USABLE_SIGIO |
f75beb47 | 5849 | gobble_input (); |
f76475ad JB |
5850 | #endif |
5851 | ||
d35af63c | 5852 | wait_reading_process_output (sec, nsec, reading ? -1 : 1, do_display, |
dcd1ca45 | 5853 | Qnil, NULL, 0); |
f76475ad | 5854 | |
4588ec20 JB |
5855 | return detect_input_pending () ? Qnil : Qt; |
5856 | } | |
5857 | ||
5f5c8ee5 | 5858 | |
a7ca3326 | 5859 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
025de85b CY |
5860 | doc: /* Perform redisplay. |
5861 | Optional arg FORCE, if non-nil, prevents redisplay from being | |
5862 | preempted by arriving input, even if `redisplay-dont-pause' is nil. | |
5863 | If `redisplay-dont-pause' is non-nil (the default), redisplay is never | |
5864 | preempted by arriving input, so FORCE does nothing. | |
5865 | ||
5866 | Return t if redisplay was performed, nil if redisplay was preempted | |
5867 | immediately by pending input. */) | |
5842a27b | 5868 | (Lisp_Object force) |
f76475ad | 5869 | { |
d311d28c | 5870 | ptrdiff_t count; |
659d9874 | 5871 | |
902b9b6d KS |
5872 | swallow_events (1); |
5873 | if ((detect_input_pending_run_timers (1) | |
01327edf | 5874 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
5875 | || !NILP (Vexecuting_kbd_macro)) |
5876 | return Qnil; | |
f76475ad | 5877 | |
01327edf KS |
5878 | count = SPECPDL_INDEX (); |
5879 | if (!NILP (force) && !redisplay_dont_pause) | |
5880 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 5881 | redisplay_preserve_echo_area (2); |
01327edf | 5882 | unbind_to (count, Qnil); |
7ba07a1a | 5883 | return Qt; |
f76475ad | 5884 | } |
5f5c8ee5 GM |
5885 | |
5886 | ||
5887 | \f | |
5888 | /*********************************************************************** | |
5889 | Other Lisp Functions | |
5890 | ***********************************************************************/ | |
5891 | ||
5892 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
5893 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 5894 | buffer-modified-flags. */ |
5f5c8ee5 GM |
5895 | |
5896 | static Lisp_Object frame_and_buffer_state; | |
5897 | ||
5898 | ||
5899 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 5900 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 5901 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
5902 | VARIABLE is a variable name whose value is either nil or a state vector |
5903 | that will be updated to contain all frames and buffers, | |
228299fa | 5904 | aside from buffers whose names start with space, |
44edd521 RS |
5905 | along with the buffers' read-only and modified flags. This allows a fast |
5906 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 5907 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
5908 | the current state. |
5909 | ||
5910 | If VARIABLE is nil, an internal variable is used. Users should not | |
5911 | pass nil for VARIABLE. */) | |
5842a27b | 5912 | (Lisp_Object variable) |
5f5c8ee5 | 5913 | { |
44edd521 | 5914 | Lisp_Object state, tail, frame, buf; |
086ca913 | 5915 | ptrdiff_t n, idx; |
5f5c8ee5 | 5916 | |
44edd521 RS |
5917 | if (! NILP (variable)) |
5918 | { | |
5919 | CHECK_SYMBOL (variable); | |
5920 | state = Fsymbol_value (variable); | |
5921 | if (! VECTORP (state)) | |
5922 | goto changed; | |
5923 | } | |
5924 | else | |
5925 | state = frame_and_buffer_state; | |
5926 | ||
086ca913 | 5927 | idx = 0; |
5f5c8ee5 GM |
5928 | FOR_EACH_FRAME (tail, frame) |
5929 | { | |
086ca913 | 5930 | if (idx == ASIZE (state)) |
44edd521 | 5931 | goto changed; |
086ca913 | 5932 | if (!EQ (AREF (state, idx++), frame)) |
5f5c8ee5 | 5933 | goto changed; |
086ca913 | 5934 | if (idx == ASIZE (state)) |
44edd521 | 5935 | goto changed; |
086ca913 | 5936 | if (!EQ (AREF (state, idx++), XFRAME (frame)->name)) |
5f5c8ee5 GM |
5937 | goto changed; |
5938 | } | |
44edd521 | 5939 | /* Check that the buffer info matches. */ |
8f3a2c26 | 5940 | FOR_EACH_LIVE_BUFFER (tail, buf) |
5f5c8ee5 | 5941 | { |
5f5c8ee5 | 5942 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 5943 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 5944 | continue; |
086ca913 | 5945 | if (idx == ASIZE (state)) |
44edd521 | 5946 | goto changed; |
086ca913 | 5947 | if (!EQ (AREF (state, idx++), buf)) |
5f5c8ee5 | 5948 | goto changed; |
086ca913 | 5949 | if (idx == ASIZE (state)) |
44edd521 | 5950 | goto changed; |
086ca913 | 5951 | if (!EQ (AREF (state, idx++), BVAR (XBUFFER (buf), read_only))) |
5f5c8ee5 | 5952 | goto changed; |
086ca913 | 5953 | if (idx == ASIZE (state)) |
44edd521 | 5954 | goto changed; |
086ca913 | 5955 | if (!EQ (AREF (state, idx++), Fbuffer_modified_p (buf))) |
5f5c8ee5 GM |
5956 | goto changed; |
5957 | } | |
086ca913 | 5958 | if (idx == ASIZE (state)) |
44edd521 | 5959 | goto changed; |
5f5c8ee5 | 5960 | /* Detect deletion of a buffer at the end of the list. */ |
086ca913 | 5961 | if (EQ (AREF (state, idx), Qlambda)) |
5f5c8ee5 | 5962 | return Qnil; |
44edd521 RS |
5963 | |
5964 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 5965 | changed: |
44edd521 RS |
5966 | /* Count the size we will need. |
5967 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
5968 | n = 1; |
5969 | FOR_EACH_FRAME (tail, frame) | |
5970 | n += 2; | |
8f3a2c26 | 5971 | FOR_EACH_LIVE_BUFFER (tail, buf) |
5f5c8ee5 | 5972 | n += 3; |
44edd521 RS |
5973 | /* Reallocate the vector if data has grown to need it, |
5974 | or if it has shrunk a lot. */ | |
5975 | if (! VECTORP (state) | |
77b37c05 PE |
5976 | || n > ASIZE (state) |
5977 | || n + 20 < ASIZE (state) / 2) | |
5f5c8ee5 | 5978 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
5979 | { |
5980 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
5981 | if (! NILP (variable)) | |
5982 | Fset (variable, state); | |
5983 | else | |
5984 | frame_and_buffer_state = state; | |
5985 | } | |
5986 | ||
5987 | /* Record the new data in the (possibly reallocated) vector. */ | |
086ca913 | 5988 | idx = 0; |
5f5c8ee5 GM |
5989 | FOR_EACH_FRAME (tail, frame) |
5990 | { | |
086ca913 DA |
5991 | ASET (state, idx, frame); |
5992 | idx++; | |
5993 | ASET (state, idx, XFRAME (frame)->name); | |
5994 | idx++; | |
5f5c8ee5 | 5995 | } |
8f3a2c26 | 5996 | FOR_EACH_LIVE_BUFFER (tail, buf) |
5f5c8ee5 | 5997 | { |
5f5c8ee5 | 5998 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 5999 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 6000 | continue; |
086ca913 DA |
6001 | ASET (state, idx, buf); |
6002 | idx++; | |
6003 | ASET (state, idx, BVAR (XBUFFER (buf), read_only)); | |
6004 | idx++; | |
6005 | ASET (state, idx, Fbuffer_modified_p (buf)); | |
6006 | idx++; | |
5f5c8ee5 GM |
6007 | } |
6008 | /* Fill up the vector with lambdas (always at least one). */ | |
086ca913 DA |
6009 | ASET (state, idx, Qlambda); |
6010 | idx++; | |
6011 | while (idx < ASIZE (state)) | |
6012 | { | |
6013 | ASET (state, idx, Qlambda); | |
6014 | idx++; | |
6015 | } | |
5f5c8ee5 | 6016 | /* Make sure we didn't overflow the vector. */ |
086ca913 | 6017 | eassert (idx <= ASIZE (state)); |
5f5c8ee5 GM |
6018 | return Qt; |
6019 | } | |
6020 | ||
6021 | ||
4588ec20 | 6022 | \f |
5f5c8ee5 GM |
6023 | /*********************************************************************** |
6024 | Initialization | |
6025 | ***********************************************************************/ | |
6026 | ||
5f5c8ee5 GM |
6027 | /* Initialization done when Emacs fork is started, before doing stty. |
6028 | Determine terminal type and set terminal_driver. Then invoke its | |
6029 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 6030 | |
dfcf069d | 6031 | void |
971de7fb | 6032 | init_display (void) |
4588ec20 | 6033 | { |
28d440ab KL |
6034 | char *terminal_type; |
6035 | ||
5f5c8ee5 GM |
6036 | /* Construct the space glyph. */ |
6037 | space_glyph.type = CHAR_GLYPH; | |
3fc809e2 | 6038 | SET_CHAR_GLYPH (space_glyph, ' ', DEFAULT_FACE_ID, 0); |
5f5c8ee5 GM |
6039 | space_glyph.charpos = -1; |
6040 | ||
4588ec20 JB |
6041 | inverse_video = 0; |
6042 | cursor_in_echo_area = 0; | |
4588ec20 | 6043 | |
1315c181 JB |
6044 | /* Now is the time to initialize this; it's used by init_sys_modes |
6045 | during startup. */ | |
2246281f | 6046 | Vinitial_window_system = Qnil; |
4588ec20 | 6047 | |
4181ad9c KL |
6048 | /* SIGWINCH needs to be handled no matter what display we start |
6049 | with. Otherwise newly opened tty frames will not resize | |
6050 | automatically. */ | |
6051 | #ifdef SIGWINCH | |
6052 | #ifndef CANNOT_DUMP | |
6053 | if (initialized) | |
6054 | #endif /* CANNOT_DUMP */ | |
2fe28299 PE |
6055 | { |
6056 | struct sigaction action; | |
6057 | emacs_sigaction_init (&action, deliver_window_change_signal); | |
6058 | sigaction (SIGWINCH, &action, 0); | |
6059 | } | |
4181ad9c | 6060 | #endif /* SIGWINCH */ |
4588ec20 | 6061 | |
d6ef42b9 | 6062 | /* If running as a daemon, no need to initialize any frames/terminal. */ |
ff808935 DN |
6063 | if (IS_DAEMON) |
6064 | return; | |
d6ef42b9 | 6065 | |
1315c181 JB |
6066 | /* If the user wants to use a window system, we shouldn't bother |
6067 | initializing the terminal. This is especially important when the | |
6068 | terminal is so dumb that emacs gives up before and doesn't bother | |
6069 | using the window system. | |
4588ec20 | 6070 | |
36bbad1d KH |
6071 | If the DISPLAY environment variable is set and nonempty, |
6072 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6073 | |
6074 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 6075 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 6076 | { |
36bbad1d | 6077 | char *display; |
36bbad1d | 6078 | display = getenv ("DISPLAY"); |
36bbad1d | 6079 | display_arg = (display != 0 && *display != 0); |
c1fc674b AS |
6080 | |
6081 | if (display_arg && !x_display_ok (display)) | |
6082 | { | |
6083 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
6084 | display); | |
6085 | inhibit_window_system = 1; | |
6086 | } | |
f040093a | 6087 | } |
d460af17 | 6088 | |
4fcc2638 | 6089 | if (!inhibit_window_system && display_arg) |
4588ec20 | 6090 | { |
111d9af3 | 6091 | Vinitial_window_system = Qx; |
4588ec20 JB |
6092 | #ifdef HAVE_X11 |
6093 | Vwindow_system_version = make_number (11); | |
039e5d71 | 6094 | #endif |
a29c3e6d | 6095 | #ifdef USE_NCURSES |
039e5d71 | 6096 | /* In some versions of ncurses, |
6a428f77 | 6097 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6098 | So call tgetent. */ |
6099 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 JB |
6100 | #endif |
6101 | return; | |
6102 | } | |
6103 | #endif /* HAVE_X_WINDOWS */ | |
6104 | ||
fd2e066a | 6105 | #ifdef HAVE_NTGUI |
177c0ea7 | 6106 | if (!inhibit_window_system) |
fd2e066a | 6107 | { |
111d9af3 | 6108 | Vinitial_window_system = Qw32; |
fd2e066a GV |
6109 | Vwindow_system_version = make_number (1); |
6110 | return; | |
6111 | } | |
6112 | #endif /* HAVE_NTGUI */ | |
6113 | ||
edfda783 AR |
6114 | #ifdef HAVE_NS |
6115 | if (!inhibit_window_system | |
6116 | #ifndef CANNOT_DUMP | |
6117 | && initialized | |
6118 | #endif | |
6119 | ) | |
6120 | { | |
111d9af3 | 6121 | Vinitial_window_system = Qns; |
5e617bc2 | 6122 | Vwindow_system_version = make_number (10); |
edfda783 AR |
6123 | return; |
6124 | } | |
6125 | #endif | |
6126 | ||
4588ec20 JB |
6127 | /* If no window system has been specified, try to use the terminal. */ |
6128 | if (! isatty (0)) | |
d9df6f40 | 6129 | fatal ("standard input is not a tty"); |
4588ec20 | 6130 | |
6152361f JR |
6131 | #ifdef WINDOWSNT |
6132 | terminal_type = "w32console"; | |
6133 | #else | |
83be8524 | 6134 | terminal_type = getenv ("TERM"); |
6152361f | 6135 | #endif |
4588ec20 JB |
6136 | if (!terminal_type) |
6137 | { | |
5d12ff0b | 6138 | #ifdef HAVE_WINDOW_SYSTEM |
b9e590fc RS |
6139 | if (! inhibit_window_system) |
6140 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6141 | else |
6142 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6143 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
4588ec20 JB |
6144 | exit (1); |
6145 | } | |
6146 | ||
0a125897 | 6147 | { |
6ed8eeff | 6148 | struct terminal *t; |
3224dac1 KL |
6149 | struct frame *f = XFRAME (selected_frame); |
6150 | ||
322aea6d PE |
6151 | init_foreground_group (); |
6152 | ||
3224dac1 | 6153 | /* Open a display on the controlling tty. */ |
6ed8eeff | 6154 | t = init_tty (0, terminal_type, 1); /* Errors are fatal. */ |
3224dac1 KL |
6155 | |
6156 | /* Convert the initial frame to use the new display. */ | |
b04f5ad2 | 6157 | if (f->output_method != output_initial) |
1088b922 | 6158 | emacs_abort (); |
6ed8eeff KL |
6159 | f->output_method = t->type; |
6160 | f->terminal = t; | |
3224dac1 | 6161 | |
6ed8eeff | 6162 | t->reference_count++; |
7ac5dac9 EZ |
6163 | #ifdef MSDOS |
6164 | f->output_data.tty->display_info = &the_only_display_info; | |
6165 | #else | |
6166 | if (f->output_method == output_termcap) | |
6167 | create_tty_output (f); | |
6168 | #endif | |
6ed8eeff | 6169 | t->display_info.tty->top_frame = selected_frame; |
5b65d888 | 6170 | change_frame_size (XFRAME (selected_frame), |
6ed8eeff KL |
6171 | FrameRows (t->display_info.tty), |
6172 | FrameCols (t->display_info.tty), 0, 0, 1); | |
3224dac1 | 6173 | |
6ed8eeff KL |
6174 | /* Delete the initial terminal. */ |
6175 | if (--initial_terminal->reference_count == 0 | |
6176 | && initial_terminal->delete_terminal_hook) | |
6177 | (*initial_terminal->delete_terminal_hook) (initial_terminal); | |
2666355c KL |
6178 | |
6179 | /* Update frame parameters to reflect the new type. */ | |
6180 | Fmodify_frame_parameters | |
6c6f1994 PE |
6181 | (selected_frame, list1 (Fcons (Qtty_type, |
6182 | Ftty_type (selected_frame)))); | |
657ceaa0 | 6183 | if (t->display_info.tty->name) |
6c6f1994 PE |
6184 | Fmodify_frame_parameters |
6185 | (selected_frame, | |
6186 | list1 (Fcons (Qtty, build_string (t->display_info.tty->name)))); | |
657ceaa0 | 6187 | else |
6c6f1994 | 6188 | Fmodify_frame_parameters (selected_frame, list1 (Fcons (Qtty, Qnil))); |
0a125897 | 6189 | } |
3fc809e2 | 6190 | |
d86c299a | 6191 | { |
91fb7e1b | 6192 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6193 | int width = FRAME_TOTAL_COLS (sf); |
6194 | int height = FRAME_LINES (sf); | |
d86c299a | 6195 | |
5f5c8ee5 | 6196 | /* If these sizes are so big they cause overflow, just ignore the |
dfd153ae PE |
6197 | change. It's not clear what better we could do. The rest of |
6198 | the code assumes that (width + 2) * height * sizeof (struct glyph) | |
6199 | does not overflow and does not exceed PTRDIFF_MAX or SIZE_MAX. */ | |
e3c25c68 PE |
6200 | if (INT_ADD_RANGE_OVERFLOW (width, 2, INT_MIN, INT_MAX) |
6201 | || INT_MULTIPLY_RANGE_OVERFLOW (width + 2, height, INT_MIN, INT_MAX) | |
dfd153ae PE |
6202 | || (min (PTRDIFF_MAX, SIZE_MAX) / sizeof (struct glyph) |
6203 | < (width + 2) * height)) | |
1559a86d | 6204 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6205 | } |
6206 | ||
91fb7e1b | 6207 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6208 | |
5f5c8ee5 GM |
6209 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ |
6210 | if (initialized | |
6211 | && !noninteractive | |
2246281f | 6212 | && NILP (Vinitial_window_system)) |
2d764c78 EZ |
6213 | { |
6214 | /* For the initial frame, we don't have any way of knowing what | |
6215 | are the foreground and background colors of the terminal. */ | |
5e617bc2 | 6216 | struct frame *sf = SELECTED_FRAME (); |
2d764c78 | 6217 | |
f9d2fdc4 EZ |
6218 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
6219 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
6220 | call0 (intern ("tty-set-up-initial-frame-faces")); |
6221 | } | |
5f5c8ee5 GM |
6222 | } |
6223 | ||
6224 | ||
6225 | \f | |
6226 | /*********************************************************************** | |
6227 | Blinking cursor | |
6228 | ***********************************************************************/ | |
6229 | ||
c3f13540 | 6230 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 6231 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 6232 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
6233 | WINDOW nil means use the selected window. SHOW non-nil means |
6234 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 | 6235 | don't show a cursor. */) |
5842a27b | 6236 | (Lisp_Object window, Lisp_Object show) |
5f5c8ee5 | 6237 | { |
5f5c8ee5 GM |
6238 | /* Don't change cursor state while redisplaying. This could confuse |
6239 | output routines. */ | |
6240 | if (!redisplaying_p) | |
b9e9df47 | 6241 | decode_any_window (window)->cursor_off_p = NILP (show); |
5f5c8ee5 | 6242 | return Qnil; |
4588ec20 | 6243 | } |
5f5c8ee5 GM |
6244 | |
6245 | ||
5d7791b3 GM |
6246 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
6247 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 6248 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 | 6249 | WINDOW nil or omitted means report on the selected window. */) |
5842a27b | 6250 | (Lisp_Object window) |
5d7791b3 | 6251 | { |
b9e9df47 | 6252 | return decode_any_window (window)->cursor_off_p ? Qnil : Qt; |
87478b52 | 6253 | } |
4588ec20 | 6254 | \f |
5f5c8ee5 GM |
6255 | /*********************************************************************** |
6256 | Initialization | |
6257 | ***********************************************************************/ | |
6258 | ||
dfcf069d | 6259 | void |
971de7fb | 6260 | syms_of_display (void) |
4588ec20 | 6261 | { |
502b9b64 | 6262 | defsubr (&Sredraw_frame); |
4588ec20 | 6263 | defsubr (&Sredraw_display); |
078b3696 | 6264 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
6265 | defsubr (&Sopen_termscript); |
6266 | defsubr (&Sding); | |
7ba07a1a | 6267 | defsubr (&Sredisplay); |
4588ec20 JB |
6268 | defsubr (&Ssleep_for); |
6269 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 6270 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 6271 | defsubr (&Sinternal_show_cursor_p); |
4588ec20 | 6272 | |
e509cfa6 | 6273 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
6274 | defsubr (&Sdump_redisplay_history); |
6275 | #endif | |
6276 | ||
d1dad759 | 6277 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
6278 | staticpro (&frame_and_buffer_state); |
6279 | ||
cd3520a4 JB |
6280 | DEFSYM (Qdisplay_table, "display-table"); |
6281 | DEFSYM (Qredisplay_dont_pause, "redisplay-dont-pause"); | |
9cda4f7c | 6282 | |
29208e82 | 6283 | DEFVAR_INT ("baud-rate", baud_rate, |
025de85b | 6284 | doc: /* The output baud rate of the terminal. |
228299fa GM |
6285 | On most systems, changing this value will affect the amount of padding |
6286 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 6287 | |
29208e82 | 6288 | DEFVAR_BOOL ("inverse-video", inverse_video, |
025de85b | 6289 | doc: /* Non-nil means invert the entire frame display. |
228299fa | 6290 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 6291 | |
29208e82 | 6292 | DEFVAR_BOOL ("visible-bell", visible_bell, |
025de85b | 6293 | doc: /* Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
6294 | |
6295 | See also `ring-bell-function'. */); | |
177c0ea7 | 6296 | |
29208e82 | 6297 | DEFVAR_BOOL ("no-redraw-on-reenter", no_redraw_on_reenter, |
025de85b | 6298 | doc: /* Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
6299 | A non-nil value is useful if the terminal can automatically preserve |
6300 | Emacs's frame display when you reenter Emacs. | |
6301 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 6302 | |
29208e82 | 6303 | DEFVAR_LISP ("initial-window-system", Vinitial_window_system, |
2246281f | 6304 | doc: /* Name of the window system that Emacs uses for the first frame. |
89baa1df EZ |
6305 | The value is a symbol: |
6306 | nil for a termcap frame (a character-only terminal), | |
6307 | 'x' for an Emacs frame that is really an X window, | |
6308 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6309 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6310 | 'pc' for a direct-write MS-DOS frame. | |
6311 | ||
6312 | Use of this variable as a boolean is deprecated. Instead, | |
6313 | use `display-graphic-p' or any of the other `display-*-p' | |
6314 | predicates which report frame's specific UI-related capabilities. */); | |
177c0ea7 | 6315 | |
70b8d0a4 SM |
6316 | DEFVAR_KBOARD ("window-system", Vwindow_system, |
6317 | doc: /* Name of window system through which the selected frame is displayed. | |
89baa1df EZ |
6318 | The value is a symbol: |
6319 | nil for a termcap frame (a character-only terminal), | |
6320 | 'x' for an Emacs frame that is really an X window, | |
6321 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6322 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6323 | 'pc' for a direct-write MS-DOS frame. | |
6324 | ||
6325 | Use of this variable as a boolean is deprecated. Instead, | |
6326 | use `display-graphic-p' or any of the other `display-*-p' | |
6327 | predicates which report frame's specific UI-related capabilities. */); | |
70b8d0a4 | 6328 | |
29208e82 | 6329 | DEFVAR_LISP ("window-system-version", Vwindow_system_version, |
bacf09b4 | 6330 | doc: /* The version number of the window system in use. |
c22140f6 | 6331 | For X windows, this is 11. */); |
177c0ea7 | 6332 | |
29208e82 | 6333 | DEFVAR_BOOL ("cursor-in-echo-area", cursor_in_echo_area, |
bacf09b4 | 6334 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 6335 | |
29208e82 | 6336 | DEFVAR_LISP ("glyph-table", Vglyph_table, |
bacf09b4 | 6337 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
6338 | If not nil, this is a vector indexed by glyph code to define the glyph. |
6339 | Each element can be: | |
6340 | integer: a glyph code which this glyph is an alias for. | |
6341 | string: output this glyph using that string (not impl. in X windows). | |
6342 | nil: this glyph mod 524288 is the code of a character to output, | |
6343 | and this glyph / 524288 is the face number (see `face-id') to use | |
6344 | while outputting it. */); | |
4588ec20 JB |
6345 | Vglyph_table = Qnil; |
6346 | ||
29208e82 | 6347 | DEFVAR_LISP ("standard-display-table", Vstandard_display_table, |
bacf09b4 | 6348 | doc: /* Display table to use for buffers that specify none. |
228299fa | 6349 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
6350 | Vstandard_display_table = Qnil; |
6351 | ||
29208e82 | 6352 | DEFVAR_BOOL ("redisplay-dont-pause", redisplay_dont_pause, |
025de85b | 6353 | doc: /* Non-nil means display update isn't paused when input is detected. */); |
6bf7006f | 6354 | redisplay_dont_pause = 1; |
5f5c8ee5 | 6355 | |
4588ec20 JB |
6356 | #ifdef CANNOT_DUMP |
6357 | if (noninteractive) | |
6358 | #endif | |
6359 | { | |
2246281f | 6360 | Vinitial_window_system = Qnil; |
4588ec20 JB |
6361 | Vwindow_system_version = Qnil; |
6362 | } | |
6363 | } |