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 | ||
565620a5 | 25 | #include <stdio.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 */ | |
edfda783 | 51 | |
5f5c8ee5 | 52 | /* Include systime.h after xterm.h to avoid double inclusion of time.h. */ |
6cbd1643 | 53 | |
5f5c8ee5 | 54 | #include "systime.h" |
3883a901 RS |
55 | #include <errno.h> |
56 | ||
8148369c | 57 | #include <fpending.h> |
c59592b3 | 58 | |
9311dcff | 59 | #if defined (HAVE_TERM_H) && defined (GNU_LINUX) |
fa0ec9f4 DL |
60 | #include <term.h> /* for tgetent */ |
61 | #endif | |
a68089e4 EZ |
62 | |
63 | #ifdef WINDOWSNT | |
64 | #include "w32.h" | |
65 | #endif | |
5f5c8ee5 GM |
66 | \f |
67 | /* Structure to pass dimensions around. Used for character bounding | |
68 | boxes, glyph matrix dimensions and alike. */ | |
69 | ||
70 | struct dim | |
71 | { | |
72 | int width; | |
73 | int height; | |
74 | }; | |
75 | ||
76 | \f | |
77 | /* Function prototypes. */ | |
78 | ||
f57e2426 | 79 | static void update_frame_line (struct frame *, int); |
2f7c71a1 AS |
80 | static int required_matrix_height (struct window *); |
81 | static int required_matrix_width (struct window *); | |
f57e2426 | 82 | static void adjust_frame_glyphs (struct frame *); |
59ea14cd | 83 | static void change_frame_size_1 (struct frame *, int, int, bool, bool, bool); |
d311d28c | 84 | static void increment_row_positions (struct glyph_row *, ptrdiff_t, ptrdiff_t); |
f57e2426 J |
85 | static void fill_up_frame_row_with_spaces (struct glyph_row *, int); |
86 | static void build_frame_matrix_from_window_tree (struct glyph_matrix *, | |
87 | struct window *); | |
88 | static void build_frame_matrix_from_leaf_window (struct glyph_matrix *, | |
89 | struct window *); | |
f57e2426 J |
90 | static void adjust_decode_mode_spec_buffer (struct frame *); |
91 | static void fill_up_glyph_row_with_spaces (struct glyph_row *); | |
59ea14cd | 92 | static void clear_window_matrices (struct window *, bool); |
f57e2426 | 93 | static void fill_up_glyph_row_area_with_spaces (struct glyph_row *, int); |
59ea14cd PE |
94 | static int scrolling_window (struct window *, bool); |
95 | static bool update_window_line (struct window *, int, bool *); | |
f57e2426 | 96 | static void mirror_make_current (struct window *, int); |
e509cfa6 | 97 | #ifdef GLYPH_DEBUG |
f57e2426 J |
98 | static void check_matrix_pointers (struct glyph_matrix *, |
99 | struct glyph_matrix *); | |
b96fd3e8 | 100 | #endif |
f57e2426 | 101 | static void mirror_line_dance (struct window *, int, int, int *, char *); |
59ea14cd PE |
102 | static bool update_window_tree (struct window *, bool); |
103 | static bool update_window (struct window *, bool); | |
104 | static bool update_frame_1 (struct frame *, bool, bool); | |
105 | static bool scrolling (struct frame *); | |
f57e2426 | 106 | static void set_window_cursor_after_update (struct window *); |
f57e2426 J |
107 | static void adjust_frame_glyphs_for_window_redisplay (struct frame *); |
108 | static void adjust_frame_glyphs_for_frame_redisplay (struct frame *); | |
5f5c8ee5 | 109 | |
59ea14cd | 110 | /* True upon entry to redisplay means do not assume anything about |
502b9b64 | 111 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 112 | |
59ea14cd | 113 | bool frame_garbaged; |
4588ec20 | 114 | |
59ea14cd | 115 | /* True means last display completed. False means it was preempted. */ |
4588ec20 | 116 | |
59ea14cd | 117 | bool display_completed; |
4588ec20 | 118 | |
e7067d00 | 119 | Lisp_Object Qdisplay_table, Qredisplay_dont_pause; |
5f5c8ee5 | 120 | |
4588ec20 | 121 | \f |
5f5c8ee5 | 122 | /* The currently selected frame. In a single-frame version, this |
91fb7e1b | 123 | variable always equals the_only_frame. */ |
4588ec20 | 124 | |
91fb7e1b | 125 | Lisp_Object selected_frame; |
4588ec20 | 126 | |
5f5c8ee5 | 127 | /* A frame which is not just a mini-buffer, or 0 if there are no such |
502b9b64 | 128 | frames. This is usually the most recent such frame that was |
87485d6f MW |
129 | selected. In a single-frame version, this variable always holds |
130 | the address of the_only_frame. */ | |
4588ec20 | 131 | |
5f5c8ee5 | 132 | struct frame *last_nonminibuf_frame; |
d52bad65 | 133 | |
59ea14cd | 134 | /* True means SIGWINCH happened when not safe. */ |
4588ec20 | 135 | |
59ea14cd | 136 | static bool delayed_size_change; |
4588ec20 | 137 | |
5f5c8ee5 | 138 | /* Updated window if != 0. Set by update_window. */ |
4588ec20 | 139 | |
5f5c8ee5 | 140 | struct window *updated_window; |
4588ec20 | 141 | |
5f5c8ee5 | 142 | /* Glyph row updated in update_window_line, and area that is updated. */ |
4588ec20 | 143 | |
5f5c8ee5 GM |
144 | struct glyph_row *updated_row; |
145 | int updated_area; | |
4588ec20 | 146 | |
5f5c8ee5 | 147 | /* A glyph for a space. */ |
4588ec20 | 148 | |
5f5c8ee5 | 149 | struct glyph space_glyph; |
4588ec20 | 150 | |
5f5c8ee5 GM |
151 | /* Counts of allocated structures. These counts serve to diagnose |
152 | memory leaks and double frees. */ | |
4588ec20 | 153 | |
5bf46f05 PE |
154 | static int glyph_matrix_count; |
155 | static int glyph_pool_count; | |
4588ec20 | 156 | |
5f5c8ee5 GM |
157 | /* If non-null, the frame whose frame matrices are manipulated. If |
158 | null, window matrices are worked on. */ | |
4588ec20 | 159 | |
5f5c8ee5 | 160 | static struct frame *frame_matrix_frame; |
4588ec20 | 161 | |
59ea14cd | 162 | /* True means that fonts have been loaded since the last glyph |
5f5c8ee5 | 163 | matrix adjustments. Redisplay must stop, and glyph matrices must |
59ea14cd | 164 | be adjusted when this flag becomes true during display. The |
5f5c8ee5 | 165 | reason fonts can be loaded so late is that fonts of fontsets are |
3aa9f0c4 KH |
166 | loaded on demand. Another reason is that a line contains many |
167 | characters displayed by zero width or very narrow glyphs of | |
168 | variable-width fonts. */ | |
836d2cde | 169 | |
59ea14cd | 170 | bool fonts_changed_p; |
836d2cde | 171 | |
177c0ea7 | 172 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 173 | This may only be used for terminal frames. */ |
836d2cde | 174 | |
e509cfa6 | 175 | #ifdef GLYPH_DEBUG |
4588ec20 | 176 | |
f57e2426 J |
177 | static int window_to_frame_vpos (struct window *, int); |
178 | static int window_to_frame_hpos (struct window *, int); | |
5f5c8ee5 GM |
179 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) |
180 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 181 | |
9b0e97aa GM |
182 | /* One element of the ring buffer containing redisplay history |
183 | information. */ | |
184 | ||
185 | struct redisplay_history | |
186 | { | |
187 | char trace[512 + 100]; | |
188 | }; | |
189 | ||
190 | /* The size of the history buffer. */ | |
191 | ||
192 | #define REDISPLAY_HISTORY_SIZE 30 | |
193 | ||
194 | /* The redisplay history buffer. */ | |
195 | ||
196 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
197 | ||
198 | /* Next free entry in redisplay_history. */ | |
199 | ||
200 | static int history_idx; | |
201 | ||
202 | /* A tick that's incremented each time something is added to the | |
203 | history. */ | |
204 | ||
dfd153ae | 205 | static uprintmax_t history_tick; |
6a8aec41 | 206 | \f |
9b0e97aa GM |
207 | /* Add to the redisplay history how window W has been displayed. |
208 | MSG is a trace containing the information how W's glyph matrix | |
59ea14cd | 209 | has been constructed. PAUSED_P means that the update |
9b0e97aa GM |
210 | has been interrupted for pending input. */ |
211 | ||
212 | static void | |
59ea14cd | 213 | add_window_display_history (struct window *w, const char *msg, bool paused_p) |
9b0e97aa GM |
214 | { |
215 | char *buf; | |
177c0ea7 | 216 | |
9b0e97aa GM |
217 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
218 | history_idx = 0; | |
219 | buf = redisplay_history[history_idx].trace; | |
220 | ++history_idx; | |
177c0ea7 | 221 | |
8666506e PE |
222 | snprintf (buf, sizeof redisplay_history[0].trace, |
223 | "%"pMu": window %p (`%s')%s\n%s", | |
224 | history_tick++, | |
225 | w, | |
d3d50620 DA |
226 | ((BUFFERP (w->buffer) |
227 | && STRINGP (BVAR (XBUFFER (w->buffer), name))) | |
228 | ? SSDATA (BVAR (XBUFFER (w->buffer), name)) | |
8666506e PE |
229 | : "???"), |
230 | paused_p ? " ***paused***" : "", | |
231 | msg); | |
9b0e97aa GM |
232 | } |
233 | ||
234 | ||
235 | /* Add to the redisplay history that frame F has been displayed. | |
59ea14cd | 236 | PAUSED_P means that the update has been interrupted for |
9b0e97aa GM |
237 | pending input. */ |
238 | ||
239 | static void | |
59ea14cd | 240 | add_frame_display_history (struct frame *f, bool paused_p) |
9b0e97aa GM |
241 | { |
242 | char *buf; | |
177c0ea7 | 243 | |
9b0e97aa GM |
244 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
245 | history_idx = 0; | |
246 | buf = redisplay_history[history_idx].trace; | |
247 | ++history_idx; | |
177c0ea7 | 248 | |
dfd153ae | 249 | sprintf (buf, "%"pMu": update frame %p%s", |
9b0e97aa GM |
250 | history_tick++, |
251 | f, paused_p ? " ***paused***" : ""); | |
252 | } | |
253 | ||
254 | ||
a7ca3326 | 255 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, |
9b0e97aa | 256 | Sdump_redisplay_history, 0, 0, "", |
7ee72033 | 257 | doc: /* Dump redisplay history to stderr. */) |
5842a27b | 258 | (void) |
9b0e97aa GM |
259 | { |
260 | int i; | |
261 | ||
262 | for (i = history_idx - 1; i != history_idx; --i) | |
263 | { | |
264 | if (i < 0) | |
265 | i = REDISPLAY_HISTORY_SIZE - 1; | |
266 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
267 | } | |
268 | ||
269 | return Qnil; | |
270 | } | |
271 | ||
272 | ||
e509cfa6 | 273 | #else /* not GLYPH_DEBUG */ |
4588ec20 | 274 | |
7df02016 KS |
275 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
276 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 277 | |
e509cfa6 | 278 | #endif /* GLYPH_DEBUG */ |
4588ec20 | 279 | |
4588ec20 | 280 | |
9e4bf381 PE |
281 | #if (defined PROFILING \ |
282 | && (defined __FreeBSD__ || defined GNU_LINUX || defined __MINGW32__) \ | |
283 | && !HAVE___EXECUTABLE_START) | |
284 | /* This function comes first in the Emacs executable and is used only | |
285 | to estimate the text start for profiling. */ | |
4588ec20 | 286 | void |
9e4bf381 | 287 | __executable_start (void) |
4588ec20 | 288 | { |
1088b922 | 289 | emacs_abort (); |
177c0ea7 | 290 | } |
72af86bd | 291 | #endif |
5f5c8ee5 GM |
292 | \f |
293 | /*********************************************************************** | |
294 | Glyph Matrices | |
295 | ***********************************************************************/ | |
296 | ||
297 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
298 | pool from which memory for the matrix should be allocated, or null | |
299 | for window-based redisplay where no glyph pools are used. The | |
300 | member `pool' of the glyph matrix structure returned is set to | |
301 | POOL, the structure is otherwise zeroed. */ | |
302 | ||
5bf46f05 | 303 | static struct glyph_matrix * |
971de7fb | 304 | new_glyph_matrix (struct glyph_pool *pool) |
4588ec20 | 305 | { |
23f86fce | 306 | struct glyph_matrix *result = xzalloc (sizeof *result); |
4588ec20 | 307 | |
5f5c8ee5 GM |
308 | /* Increment number of allocated matrices. This count is used |
309 | to detect memory leaks. */ | |
310 | ++glyph_matrix_count; | |
4588ec20 | 311 | |
5f5c8ee5 GM |
312 | /* Set pool and return. */ |
313 | result->pool = pool; | |
314 | return result; | |
4588ec20 JB |
315 | } |
316 | ||
4588ec20 | 317 | |
5f5c8ee5 GM |
318 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
319 | ||
320 | The global counter glyph_matrix_count is decremented when a matrix | |
321 | is freed. If the count gets negative, more structures were freed | |
322 | than allocated, i.e. one matrix was freed more than once or a bogus | |
323 | pointer was passed to this function. | |
177c0ea7 | 324 | |
5f5c8ee5 GM |
325 | If MATRIX->pool is null, this means that the matrix manages its own |
326 | glyph memory---this is done for matrices on X frames. Freeing the | |
327 | matrix also frees the glyph memory in this case. */ | |
328 | ||
329 | static void | |
971de7fb | 330 | free_glyph_matrix (struct glyph_matrix *matrix) |
4588ec20 | 331 | { |
5f5c8ee5 GM |
332 | if (matrix) |
333 | { | |
334 | int i; | |
335 | ||
336 | /* Detect the case that more matrices are freed than were | |
337 | allocated. */ | |
338 | if (--glyph_matrix_count < 0) | |
1088b922 | 339 | emacs_abort (); |
5f5c8ee5 GM |
340 | |
341 | /* Free glyph memory if MATRIX owns it. */ | |
342 | if (matrix->pool == NULL) | |
343 | for (i = 0; i < matrix->rows_allocated; ++i) | |
344 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 345 | |
5f5c8ee5 GM |
346 | /* Free row structures and the matrix itself. */ |
347 | xfree (matrix->rows); | |
348 | xfree (matrix); | |
349 | } | |
350 | } | |
4588ec20 | 351 | |
4588ec20 | 352 | |
5f5c8ee5 GM |
353 | /* Return the number of glyphs to reserve for a marginal area of |
354 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
355 | display line of window W. MARGIN gives the width of the marginal | |
356 | area in canonical character units. MARGIN should be an integer | |
357 | or a float. */ | |
358 | ||
359 | static int | |
971de7fb | 360 | margin_glyphs_to_reserve (struct window *w, int total_glyphs, Lisp_Object margin) |
5f5c8ee5 GM |
361 | { |
362 | int n; | |
4588ec20 | 363 | |
5f5c8ee5 | 364 | if (NUMBERP (margin)) |
4588ec20 | 365 | { |
d3d50620 | 366 | int width = XFASTINT (w->total_cols); |
5f5c8ee5 GM |
367 | double d = max (0, XFLOATINT (margin)); |
368 | d = min (width / 2 - 1, d); | |
35ec832e | 369 | n = (int) ((double) total_glyphs / width * d); |
5f5c8ee5 GM |
370 | } |
371 | else | |
372 | n = 0; | |
373 | ||
374 | return n; | |
375 | } | |
376 | ||
59ea14cd | 377 | /* Return true if ROW's hash value is correct. |
e509cfa6 DA |
378 | Optimized away if ENABLE_CHECKING is not defined. */ |
379 | ||
59ea14cd | 380 | static bool |
7a7270dd EZ |
381 | verify_row_hash (struct glyph_row *row) |
382 | { | |
015137db | 383 | return row->hash == row_hash (row); |
7a7270dd | 384 | } |
4588ec20 | 385 | |
5f5c8ee5 GM |
386 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
387 | window sizes. | |
4588ec20 | 388 | |
5f5c8ee5 GM |
389 | W is null if the function is called for a frame glyph matrix. |
390 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
391 | indices of the first column and row of MATRIX within the frame | |
392 | matrix, if such a matrix exists. They are zero for purely | |
393 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 394 | |
5f5c8ee5 GM |
395 | In window-based redisplay, where no frame matrices exist, glyph |
396 | matrices manage their own glyph storage. Otherwise, they allocate | |
397 | storage from a common frame glyph pool which can be found in | |
398 | MATRIX->pool. | |
23b0200c | 399 | |
5f5c8ee5 GM |
400 | The reason for this memory management strategy is to avoid complete |
401 | frame redraws if possible. When we allocate from a common pool, a | |
402 | change of the location or size of a sub-matrix within the pool | |
403 | requires a complete redisplay of the frame because we cannot easily | |
404 | make sure that the current matrices of all windows still agree with | |
405 | what is displayed on the screen. While this is usually fast, it | |
406 | leads to screen flickering. */ | |
23b0200c | 407 | |
5f5c8ee5 | 408 | static void |
971de7fb | 409 | adjust_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int x, int y, struct dim dim) |
5f5c8ee5 GM |
410 | { |
411 | int i; | |
412 | int new_rows; | |
59ea14cd PE |
413 | bool marginal_areas_changed_p = 0; |
414 | bool header_line_changed_p = 0; | |
415 | bool header_line_p = 0; | |
5f5c8ee5 | 416 | int left = -1, right = -1; |
ca8a12a7 | 417 | int window_width = -1, window_height = -1; |
5f5c8ee5 | 418 | |
6b61353c KH |
419 | /* See if W had a header line that has disappeared now, or vice versa. |
420 | Get W's size. */ | |
5f5c8ee5 GM |
421 | if (w) |
422 | { | |
6b61353c KH |
423 | window_box (w, -1, 0, 0, &window_width, &window_height); |
424 | ||
045dee35 GM |
425 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
426 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 427 | } |
045dee35 | 428 | matrix->header_line_p = header_line_p; |
23b0200c | 429 | |
6b61353c KH |
430 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
431 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
432 | haven't changed. This optimization is important because preserving |
433 | the matrix means preventing redisplay. */ | |
434 | if (matrix->pool == NULL) | |
435 | { | |
d3d50620 DA |
436 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
437 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
a54e2c05 | 438 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
439 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs |
440 | || right != matrix->right_margin_glyphs); | |
441 | ||
442 | if (!marginal_areas_changed_p | |
443 | && !fonts_changed_p | |
045dee35 | 444 | && !header_line_changed_p |
7df02016 KS |
445 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
446 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
447 | && matrix->window_height == window_height |
448 | && matrix->window_vscroll == w->vscroll | |
449 | && matrix->window_width == window_width) | |
450 | return; | |
451 | } | |
177c0ea7 | 452 | |
5f5c8ee5 GM |
453 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
454 | if (matrix->rows_allocated < dim.height) | |
455 | { | |
0065d054 | 456 | int old_alloc = matrix->rows_allocated; |
5f5c8ee5 | 457 | new_rows = dim.height - matrix->rows_allocated; |
0065d054 PE |
458 | matrix->rows = xpalloc (matrix->rows, &matrix->rows_allocated, |
459 | new_rows, INT_MAX, sizeof *matrix->rows); | |
460 | memset (matrix->rows + old_alloc, 0, | |
461 | (matrix->rows_allocated - old_alloc) * sizeof *matrix->rows); | |
5f5c8ee5 GM |
462 | } |
463 | else | |
464 | new_rows = 0; | |
60a8948a | 465 | |
5f5c8ee5 GM |
466 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
467 | on a frame not using window-based redisplay. Set up pointers for | |
468 | each row into the glyph pool. */ | |
469 | if (matrix->pool) | |
470 | { | |
a54e2c05 | 471 | eassert (matrix->pool->glyphs); |
177c0ea7 | 472 | |
5f5c8ee5 | 473 | if (w) |
60a8948a | 474 | { |
5f5c8ee5 | 475 | left = margin_glyphs_to_reserve (w, dim.width, |
d3d50620 | 476 | w->left_margin_cols); |
5f5c8ee5 | 477 | right = margin_glyphs_to_reserve (w, dim.width, |
d3d50620 | 478 | w->right_margin_cols); |
60a8948a | 479 | } |
5f5c8ee5 GM |
480 | else |
481 | left = right = 0; | |
177c0ea7 | 482 | |
5f5c8ee5 | 483 | for (i = 0; i < dim.height; ++i) |
60a8948a | 484 | { |
5f5c8ee5 | 485 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
486 | |
487 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
488 | = (matrix->pool->glyphs |
489 | + (y + i) * matrix->pool->ncolumns | |
490 | + x); | |
177c0ea7 | 491 | |
5f5c8ee5 GM |
492 | if (w == NULL |
493 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 494 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
495 | { |
496 | row->glyphs[TEXT_AREA] | |
497 | = row->glyphs[LEFT_MARGIN_AREA]; | |
498 | row->glyphs[RIGHT_MARGIN_AREA] | |
499 | = row->glyphs[TEXT_AREA] + dim.width; | |
500 | row->glyphs[LAST_AREA] | |
501 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
502 | } | |
503 | else | |
504 | { | |
505 | row->glyphs[TEXT_AREA] | |
506 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
507 | row->glyphs[RIGHT_MARGIN_AREA] | |
508 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
509 | row->glyphs[LAST_AREA] | |
510 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
511 | } | |
60a8948a | 512 | } |
177c0ea7 | 513 | |
5f5c8ee5 GM |
514 | matrix->left_margin_glyphs = left; |
515 | matrix->right_margin_glyphs = right; | |
516 | } | |
517 | else | |
518 | { | |
519 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
6b61353c KH |
520 | its own memory. It is a window matrix for window-based redisplay. |
521 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
522 | if (dim.width > matrix->matrix_w |
523 | || new_rows | |
045dee35 | 524 | || header_line_changed_p |
5f5c8ee5 | 525 | || marginal_areas_changed_p) |
4588ec20 | 526 | { |
5f5c8ee5 GM |
527 | struct glyph_row *row = matrix->rows; |
528 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 529 | |
5f5c8ee5 GM |
530 | while (row < end) |
531 | { | |
532 | row->glyphs[LEFT_MARGIN_AREA] | |
0065d054 PE |
533 | = xnrealloc (row->glyphs[LEFT_MARGIN_AREA], |
534 | dim.width, sizeof (struct glyph)); | |
177c0ea7 | 535 | |
5f5c8ee5 GM |
536 | /* The mode line never has marginal areas. */ |
537 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 538 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
539 | { |
540 | row->glyphs[TEXT_AREA] | |
541 | = row->glyphs[LEFT_MARGIN_AREA]; | |
542 | row->glyphs[RIGHT_MARGIN_AREA] | |
543 | = row->glyphs[TEXT_AREA] + dim.width; | |
544 | row->glyphs[LAST_AREA] | |
545 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
546 | } | |
547 | else | |
548 | { | |
549 | row->glyphs[TEXT_AREA] | |
550 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
551 | row->glyphs[RIGHT_MARGIN_AREA] | |
552 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
553 | row->glyphs[LAST_AREA] | |
554 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
555 | } | |
556 | ++row; | |
557 | } | |
4588ec20 JB |
558 | } |
559 | ||
a54e2c05 | 560 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
561 | matrix->left_margin_glyphs = left; |
562 | matrix->right_margin_glyphs = right; | |
563 | } | |
177c0ea7 | 564 | |
5f5c8ee5 GM |
565 | /* Number of rows to be used by MATRIX. */ |
566 | matrix->nrows = dim.height; | |
a54e2c05 | 567 | eassert (matrix->nrows >= 0); |
5f5c8ee5 | 568 | |
b7b20fbd | 569 | if (w) |
5f5c8ee5 | 570 | { |
b7b20fbd | 571 | if (matrix == w->current_matrix) |
4588ec20 | 572 | { |
b7b20fbd GM |
573 | /* Mark rows in a current matrix of a window as not having |
574 | valid contents. It's important to not do this for | |
575 | desired matrices. When Emacs starts, it may already be | |
576 | building desired matrices when this function runs. */ | |
577 | if (window_width < 0) | |
578 | window_width = window_box_width (w, -1); | |
177c0ea7 | 579 | |
b7b20fbd GM |
580 | /* Optimize the case that only the height has changed (C-x 2, |
581 | upper window). Invalidate all rows that are no longer part | |
582 | of the window. */ | |
583 | if (!marginal_areas_changed_p | |
73d75a62 GM |
584 | && !header_line_changed_p |
585 | && new_rows == 0 | |
586 | && dim.width == matrix->matrix_w | |
7df02016 KS |
587 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
588 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 589 | && matrix->window_width == window_width) |
b7b20fbd | 590 | { |
dd42b31a GM |
591 | /* Find the last row in the window. */ |
592 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
593 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
594 | { | |
26447967 | 595 | ++i; |
dd42b31a GM |
596 | break; |
597 | } | |
b7b20fbd GM |
598 | |
599 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 600 | are invalidated below. */ |
d3d50620 DA |
601 | if (INTEGERP (w->window_end_vpos) |
602 | && XFASTINT (w->window_end_vpos) >= i) | |
9d93ce29 | 603 | w->window_end_valid = 0; |
177c0ea7 | 604 | |
b7b20fbd GM |
605 | while (i < matrix->nrows) |
606 | matrix->rows[i++].enabled_p = 0; | |
607 | } | |
608 | else | |
609 | { | |
610 | for (i = 0; i < matrix->nrows; ++i) | |
611 | matrix->rows[i].enabled_p = 0; | |
612 | } | |
5f5c8ee5 | 613 | } |
b7b20fbd | 614 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 615 | { |
b7b20fbd GM |
616 | /* Rows in desired matrices always have to be cleared; |
617 | redisplay expects this is the case when it runs, so it | |
618 | had better be the case when we adjust matrices between | |
619 | redisplays. */ | |
5f5c8ee5 GM |
620 | for (i = 0; i < matrix->nrows; ++i) |
621 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 622 | } |
4588ec20 | 623 | } |
177c0ea7 JB |
624 | |
625 | ||
5f5c8ee5 GM |
626 | /* Remember last values to be able to optimize frame redraws. */ |
627 | matrix->matrix_x = x; | |
628 | matrix->matrix_y = y; | |
629 | matrix->matrix_w = dim.width; | |
630 | matrix->matrix_h = dim.height; | |
631 | ||
632 | /* Record the top y location and height of W at the time the matrix | |
633 | was last adjusted. This is used to optimize redisplay above. */ | |
634 | if (w) | |
4588ec20 | 635 | { |
7df02016 KS |
636 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
637 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
638 | matrix->window_height = window_height; |
639 | matrix->window_width = window_width; | |
640 | matrix->window_vscroll = w->vscroll; | |
641 | } | |
642 | } | |
4588ec20 | 643 | |
4588ec20 | 644 | |
5f5c8ee5 GM |
645 | /* Reverse the contents of rows in MATRIX between START and END. The |
646 | contents of the row at END - 1 end up at START, END - 2 at START + | |
647 | 1 etc. This is part of the implementation of rotate_matrix (see | |
648 | below). */ | |
d52bad65 | 649 | |
5f5c8ee5 | 650 | static void |
971de7fb | 651 | reverse_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 GM |
652 | { |
653 | int i, j; | |
23b0200c | 654 | |
5f5c8ee5 GM |
655 | for (i = start, j = end - 1; i < j; ++i, --j) |
656 | { | |
657 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
658 | initialization. */ | |
659 | struct glyph_row temp; | |
660 | temp = matrix->rows[i]; | |
661 | matrix->rows[i] = matrix->rows[j]; | |
662 | matrix->rows[j] = temp; | |
663 | } | |
664 | } | |
23b0200c | 665 | |
23b0200c | 666 | |
5f5c8ee5 GM |
667 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
668 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
669 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
670 | row structures are moved around). | |
60a8948a | 671 | |
5f5c8ee5 GM |
672 | The algorithm used for rotating the vector was, I believe, first |
673 | described by Kernighan. See the vector R as consisting of two | |
674 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
675 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
676 | and reverse the result to get (ArBr)r which is BA. Similar for | |
677 | rotating right. */ | |
678 | ||
679 | void | |
971de7fb | 680 | rotate_matrix (struct glyph_matrix *matrix, int first, int last, int by) |
5f5c8ee5 GM |
681 | { |
682 | if (by < 0) | |
683 | { | |
684 | /* Up (rotate left, i.e. towards lower indices). */ | |
685 | by = -by; | |
686 | reverse_rows (matrix, first, first + by); | |
687 | reverse_rows (matrix, first + by, last); | |
688 | reverse_rows (matrix, first, last); | |
689 | } | |
690 | else if (by > 0) | |
691 | { | |
692 | /* Down (rotate right, i.e. towards higher indices). */ | |
693 | reverse_rows (matrix, last - by, last); | |
694 | reverse_rows (matrix, first, last - by); | |
695 | reverse_rows (matrix, first, last); | |
696 | } | |
697 | } | |
698 | ||
699 | ||
700 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
701 | with indices START <= index < END. Increment positions by DELTA/ | |
702 | DELTA_BYTES. */ | |
703 | ||
704 | void | |
ace1712c | 705 | increment_matrix_positions (struct glyph_matrix *matrix, int start, int end, |
d311d28c | 706 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
707 | { |
708 | /* Check that START and END are reasonable values. */ | |
a54e2c05 DA |
709 | eassert (start >= 0 && start <= matrix->nrows); |
710 | eassert (end >= 0 && end <= matrix->nrows); | |
711 | eassert (start <= end); | |
5f5c8ee5 GM |
712 | |
713 | for (; start < end; ++start) | |
86c11ba1 | 714 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
715 | } |
716 | ||
717 | ||
59ea14cd PE |
718 | /* Clear the enable_p flags in a range of rows in glyph matrix MATRIX. |
719 | START and END are the row indices of the first and last + 1 row to clear. */ | |
5f5c8ee5 GM |
720 | |
721 | void | |
59ea14cd | 722 | clear_glyph_matrix_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 | 723 | { |
a54e2c05 DA |
724 | eassert (start <= end); |
725 | eassert (start >= 0 && start < matrix->nrows); | |
726 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 727 | |
5f5c8ee5 | 728 | for (; start < end; ++start) |
59ea14cd | 729 | matrix->rows[start].enabled_p = 0; |
5f5c8ee5 GM |
730 | } |
731 | ||
732 | ||
733 | /* Clear MATRIX. | |
734 | ||
59ea14cd PE |
735 | Empty all rows in MATRIX by clearing their enabled_p flags. |
736 | The function prepare_desired_row will eventually really clear a row | |
737 | when it sees one with a false enabled_p flag. | |
5f5c8ee5 | 738 | |
59ea14cd | 739 | Reset update hints to default values. The only update hint |
5f5c8ee5 GM |
740 | currently present is the flag MATRIX->no_scrolling_p. */ |
741 | ||
742 | void | |
971de7fb | 743 | clear_glyph_matrix (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
744 | { |
745 | if (matrix) | |
746 | { | |
59ea14cd | 747 | clear_glyph_matrix_rows (matrix, 0, matrix->nrows); |
5f5c8ee5 GM |
748 | matrix->no_scrolling_p = 0; |
749 | } | |
750 | } | |
177c0ea7 | 751 | |
5f5c8ee5 GM |
752 | |
753 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
754 | Increment y-positions in glyph rows between START and END by DY, | |
755 | and recompute their visible height. */ | |
756 | ||
757 | void | |
971de7fb | 758 | shift_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int start, int end, int dy) |
5f5c8ee5 GM |
759 | { |
760 | int min_y, max_y; | |
177c0ea7 | 761 | |
a54e2c05 DA |
762 | eassert (start <= end); |
763 | eassert (start >= 0 && start < matrix->nrows); | |
764 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 765 | |
7df02016 KS |
766 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
767 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 768 | |
5f5c8ee5 GM |
769 | for (; start < end; ++start) |
770 | { | |
771 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 772 | |
5f5c8ee5 | 773 | row->y += dy; |
d6c747a4 | 774 | row->visible_height = row->height; |
177c0ea7 | 775 | |
5f5c8ee5 | 776 | if (row->y < min_y) |
d6c747a4 GM |
777 | row->visible_height -= min_y - row->y; |
778 | if (row->y + row->height > max_y) | |
779 | row->visible_height -= row->y + row->height - max_y; | |
e61124cd YM |
780 | if (row->fringe_bitmap_periodic_p) |
781 | row->redraw_fringe_bitmaps_p = 1; | |
5f5c8ee5 GM |
782 | } |
783 | } | |
784 | ||
785 | ||
786 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
787 | invalid is done by setting enabled_p to zero for all rows in a | |
788 | current matrix. */ | |
789 | ||
790 | void | |
971de7fb | 791 | clear_current_matrices (register struct frame *f) |
5f5c8ee5 GM |
792 | { |
793 | /* Clear frame current matrix, if we have one. */ | |
794 | if (f->current_matrix) | |
795 | clear_glyph_matrix (f->current_matrix); | |
796 | ||
797 | /* Clear the matrix of the menu bar window, if such a window exists. | |
798 | The menu bar window is currently used to display menus on X when | |
799 | no toolkit support is compiled in. */ | |
e69b0960 DA |
800 | if (WINDOWP (f->menu_bar_window)) |
801 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
5f5c8ee5 | 802 | |
9ea173e8 | 803 | /* Clear the matrix of the tool-bar window, if any. */ |
e69b0960 DA |
804 | if (WINDOWP (f->tool_bar_window)) |
805 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
5f5c8ee5 GM |
806 | |
807 | /* Clear current window matrices. */ | |
a54e2c05 | 808 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
809 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); |
810 | } | |
811 | ||
812 | ||
813 | /* Clear out all display lines of F for a coming redisplay. */ | |
814 | ||
815 | void | |
971de7fb | 816 | clear_desired_matrices (register struct frame *f) |
5f5c8ee5 GM |
817 | { |
818 | if (f->desired_matrix) | |
819 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 820 | |
e69b0960 DA |
821 | if (WINDOWP (f->menu_bar_window)) |
822 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
5f5c8ee5 | 823 | |
e69b0960 DA |
824 | if (WINDOWP (f->tool_bar_window)) |
825 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
5f5c8ee5 GM |
826 | |
827 | /* Do it for window matrices. */ | |
a54e2c05 | 828 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
829 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); |
830 | } | |
831 | ||
832 | ||
59ea14cd PE |
833 | /* Clear matrices in window tree rooted in W. If DESIRED_P, |
834 | clear desired matrices, otherwise clear current matrices. */ | |
5f5c8ee5 GM |
835 | |
836 | static void | |
59ea14cd | 837 | clear_window_matrices (struct window *w, bool desired_p) |
5f5c8ee5 GM |
838 | { |
839 | while (w) | |
840 | { | |
d3d50620 | 841 | if (!NILP (w->hchild)) |
5f5c8ee5 | 842 | { |
d3d50620 DA |
843 | eassert (WINDOWP (w->hchild)); |
844 | clear_window_matrices (XWINDOW (w->hchild), desired_p); | |
5f5c8ee5 | 845 | } |
d3d50620 | 846 | else if (!NILP (w->vchild)) |
5f5c8ee5 | 847 | { |
d3d50620 DA |
848 | eassert (WINDOWP (w->vchild)); |
849 | clear_window_matrices (XWINDOW (w->vchild), desired_p); | |
5f5c8ee5 GM |
850 | } |
851 | else | |
852 | { | |
853 | if (desired_p) | |
854 | clear_glyph_matrix (w->desired_matrix); | |
855 | else | |
856 | { | |
857 | clear_glyph_matrix (w->current_matrix); | |
9d93ce29 | 858 | w->window_end_valid = 0; |
5f5c8ee5 GM |
859 | } |
860 | } | |
861 | ||
d3d50620 | 862 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
863 | } |
864 | } | |
865 | ||
866 | ||
867 | \f | |
868 | /*********************************************************************** | |
869 | Glyph Rows | |
870 | ||
871 | See dispextern.h for an overall explanation of glyph rows. | |
872 | ***********************************************************************/ | |
873 | ||
874 | /* Clear glyph row ROW. Do it in a way that makes it robust against | |
875 | changes in the glyph_row structure, i.e. addition or removal of | |
876 | structure members. */ | |
877 | ||
2cca872d KH |
878 | static struct glyph_row null_row; |
879 | ||
5f5c8ee5 | 880 | void |
971de7fb | 881 | clear_glyph_row (struct glyph_row *row) |
5f5c8ee5 GM |
882 | { |
883 | struct glyph *p[1 + LAST_AREA]; | |
5f5c8ee5 GM |
884 | |
885 | /* Save pointers. */ | |
886 | p[LEFT_MARGIN_AREA] = row->glyphs[LEFT_MARGIN_AREA]; | |
887 | p[TEXT_AREA] = row->glyphs[TEXT_AREA]; | |
888 | p[RIGHT_MARGIN_AREA] = row->glyphs[RIGHT_MARGIN_AREA]; | |
889 | p[LAST_AREA] = row->glyphs[LAST_AREA]; | |
890 | ||
891 | /* Clear. */ | |
892 | *row = null_row; | |
893 | ||
894 | /* Restore pointers. */ | |
895 | row->glyphs[LEFT_MARGIN_AREA] = p[LEFT_MARGIN_AREA]; | |
896 | row->glyphs[TEXT_AREA] = p[TEXT_AREA]; | |
897 | row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA]; | |
898 | row->glyphs[LAST_AREA] = p[LAST_AREA]; | |
45560b1a GM |
899 | |
900 | #if 0 /* At some point, some bit-fields of struct glyph were not set, | |
901 | which made glyphs unequal when compared with GLYPH_EQUAL_P. | |
902 | Redisplay outputs such glyphs, and flickering effects were | |
903 | the result. This also depended on the contents of memory | |
904 | returned by xmalloc. If flickering happens again, activate | |
153a073c | 905 | the code below. If the flickering is gone with that, chances |
45560b1a | 906 | are that the flickering has the same reason as here. */ |
72af86bd | 907 | memset (p[0], 0, (char *) p[LAST_AREA] - (char *) p[0]); |
45560b1a | 908 | #endif |
5f5c8ee5 GM |
909 | } |
910 | ||
911 | ||
912 | /* Make ROW an empty, enabled row of canonical character height, | |
913 | in window W starting at y-position Y. */ | |
914 | ||
915 | void | |
971de7fb | 916 | blank_row (struct window *w, struct glyph_row *row, int y) |
5f5c8ee5 GM |
917 | { |
918 | int min_y, max_y; | |
177c0ea7 | 919 | |
7df02016 KS |
920 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
921 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 922 | |
5f5c8ee5 GM |
923 | clear_glyph_row (row); |
924 | row->y = y; | |
408f5064 | 925 | row->ascent = row->phys_ascent = 0; |
d3d50620 | 926 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 927 | row->visible_height = row->height; |
177c0ea7 | 928 | |
5f5c8ee5 | 929 | if (row->y < min_y) |
d6c747a4 GM |
930 | row->visible_height -= min_y - row->y; |
931 | if (row->y + row->height > max_y) | |
932 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
933 | |
934 | row->enabled_p = 1; | |
935 | } | |
936 | ||
937 | ||
938 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
939 | are the amounts by which to change positions. Note that the first | |
940 | glyph of the text area of a row can have a buffer position even if | |
941 | the used count of the text area is zero. Such rows display line | |
942 | ends. */ | |
943 | ||
5bf46f05 | 944 | static void |
ace1712c | 945 | increment_row_positions (struct glyph_row *row, |
d311d28c | 946 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
947 | { |
948 | int area, i; | |
949 | ||
950 | /* Increment start and end positions. */ | |
951 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
952 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
953 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
954 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
d36fe237 EZ |
955 | CHARPOS (row->start.pos) += delta; |
956 | BYTEPOS (row->start.pos) += delta_bytes; | |
957 | CHARPOS (row->end.pos) += delta; | |
958 | BYTEPOS (row->end.pos) += delta_bytes; | |
5f5c8ee5 | 959 | |
5cacdcfd KS |
960 | if (!row->enabled_p) |
961 | return; | |
962 | ||
5f5c8ee5 GM |
963 | /* Increment positions in glyphs. */ |
964 | for (area = 0; area < LAST_AREA; ++area) | |
965 | for (i = 0; i < row->used[area]; ++i) | |
966 | if (BUFFERP (row->glyphs[area][i].object) | |
967 | && row->glyphs[area][i].charpos > 0) | |
968 | row->glyphs[area][i].charpos += delta; | |
969 | ||
970 | /* Capture the case of rows displaying a line end. */ | |
971 | if (row->used[TEXT_AREA] == 0 | |
972 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
973 | row->glyphs[TEXT_AREA]->charpos += delta; | |
974 | } | |
975 | ||
976 | ||
9af3e742 | 977 | #if 0 |
5f5c8ee5 GM |
978 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
979 | contents, i.e. glyph structure contents are exchanged between A and | |
980 | B without changing glyph pointers in A and B. */ | |
981 | ||
982 | static void | |
1dae0f0a | 983 | swap_glyphs_in_rows (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
984 | { |
985 | int area; | |
986 | ||
987 | for (area = 0; area < LAST_AREA; ++area) | |
988 | { | |
989 | /* Number of glyphs to swap. */ | |
990 | int max_used = max (a->used[area], b->used[area]); | |
991 | ||
992 | /* Start of glyphs in area of row A. */ | |
993 | struct glyph *glyph_a = a->glyphs[area]; | |
994 | ||
995 | /* End + 1 of glyphs in area of row A. */ | |
996 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
997 | ||
998 | /* Start of glyphs in area of row B. */ | |
999 | struct glyph *glyph_b = b->glyphs[area]; | |
1000 | ||
1001 | while (glyph_a < glyph_a_end) | |
1002 | { | |
1003 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
1004 | initialization. */ | |
1005 | struct glyph temp; | |
1006 | temp = *glyph_a; | |
1007 | *glyph_a = *glyph_b; | |
1008 | *glyph_b = temp; | |
1009 | ++glyph_a; | |
1010 | ++glyph_b; | |
1011 | } | |
1012 | } | |
1013 | } | |
1014 | ||
9af3e742 | 1015 | #endif /* 0 */ |
5f5c8ee5 | 1016 | |
015137db EZ |
1017 | /* Exchange pointers to glyph memory between glyph rows A and B. Also |
1018 | exchange the used[] array and the hash values of the rows, because | |
1019 | these should all go together for the row's hash value to be | |
1020 | correct. */ | |
5f5c8ee5 | 1021 | |
b0ab8123 | 1022 | static void |
971de7fb | 1023 | swap_glyph_pointers (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1024 | { |
1025 | int i; | |
015137db EZ |
1026 | unsigned hash_tem = a->hash; |
1027 | ||
5f5c8ee5 GM |
1028 | for (i = 0; i < LAST_AREA + 1; ++i) |
1029 | { | |
1030 | struct glyph *temp = a->glyphs[i]; | |
015137db | 1031 | |
5f5c8ee5 GM |
1032 | a->glyphs[i] = b->glyphs[i]; |
1033 | b->glyphs[i] = temp; | |
73055685 EZ |
1034 | if (i < LAST_AREA) |
1035 | { | |
1036 | short used_tem = a->used[i]; | |
1037 | ||
1038 | a->used[i] = b->used[i]; | |
1039 | b->used[i] = used_tem; | |
1040 | } | |
5f5c8ee5 | 1041 | } |
015137db EZ |
1042 | a->hash = b->hash; |
1043 | b->hash = hash_tem; | |
5f5c8ee5 GM |
1044 | } |
1045 | ||
1046 | ||
1047 | /* Copy glyph row structure FROM to glyph row structure TO, except | |
015137db EZ |
1048 | that glyph pointers, the `used' counts, and the hash values in the |
1049 | structures are left unchanged. */ | |
5f5c8ee5 | 1050 | |
b0ab8123 | 1051 | static void |
971de7fb | 1052 | copy_row_except_pointers (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1053 | { |
1054 | struct glyph *pointers[1 + LAST_AREA]; | |
73055685 | 1055 | short used[LAST_AREA]; |
015137db | 1056 | unsigned hashval; |
5f5c8ee5 GM |
1057 | |
1058 | /* Save glyph pointers of TO. */ | |
72af86bd | 1059 | memcpy (pointers, to->glyphs, sizeof to->glyphs); |
015137db EZ |
1060 | memcpy (used, to->used, sizeof to->used); |
1061 | hashval = to->hash; | |
5f5c8ee5 GM |
1062 | |
1063 | /* Do a structure assignment. */ | |
1064 | *to = *from; | |
1065 | ||
1066 | /* Restore original pointers of TO. */ | |
72af86bd | 1067 | memcpy (to->glyphs, pointers, sizeof to->glyphs); |
015137db EZ |
1068 | memcpy (to->used, used, sizeof to->used); |
1069 | to->hash = hashval; | |
5f5c8ee5 GM |
1070 | } |
1071 | ||
1072 | ||
5f5c8ee5 GM |
1073 | /* Assign glyph row FROM to glyph row TO. This works like a structure |
1074 | assignment TO = FROM, except that glyph pointers are not copied but | |
1075 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1076 | a memory leak. */ | |
1077 | ||
b0ab8123 | 1078 | static void |
971de7fb | 1079 | assign_row (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1080 | { |
1081 | swap_glyph_pointers (to, from); | |
1082 | copy_row_except_pointers (to, from); | |
1083 | } | |
1084 | ||
1085 | ||
1086 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1087 | a row in a window matrix, is a slice of the glyph memory of the | |
1088 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
59ea14cd | 1089 | is true if the glyph memory of WINDOW_ROW is part of the glyph |
5f5c8ee5 GM |
1090 | memory of FRAME_ROW. */ |
1091 | ||
e509cfa6 | 1092 | #ifdef GLYPH_DEBUG |
9339e87f | 1093 | |
59ea14cd | 1094 | static bool |
59fc5cf9 | 1095 | glyph_row_slice_p (struct glyph_row *window_row, struct glyph_row *frame_row) |
5f5c8ee5 GM |
1096 | { |
1097 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1098 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1099 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1100 | ||
1101 | return (frame_glyph_start <= window_glyph_start | |
1102 | && window_glyph_start < frame_glyph_end); | |
1103 | } | |
1104 | ||
9339e87f | 1105 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1106 | |
9af3e742 GM |
1107 | #if 0 |
1108 | ||
5f5c8ee5 GM |
1109 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1110 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1111 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1112 | ||
1113 | static struct glyph_row * | |
59fc5cf9 AS |
1114 | find_glyph_row_slice (struct glyph_matrix *window_matrix, |
1115 | struct glyph_matrix *frame_matrix, int row) | |
5f5c8ee5 GM |
1116 | { |
1117 | int i; | |
1118 | ||
a54e2c05 | 1119 | eassert (row >= 0 && row < frame_matrix->nrows); |
5f5c8ee5 GM |
1120 | |
1121 | for (i = 0; i < window_matrix->nrows; ++i) | |
1122 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1123 | frame_matrix->rows + row)) | |
1124 | break; | |
1125 | ||
1126 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1127 | } | |
1128 | ||
9af3e742 | 1129 | #endif /* 0 */ |
5f5c8ee5 GM |
1130 | |
1131 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1132 | i.e. they are only marked as to be cleared by setting their | |
1133 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1134 | call to this function really clears it. */ | |
1135 | ||
1136 | void | |
971de7fb | 1137 | prepare_desired_row (struct glyph_row *row) |
5f5c8ee5 GM |
1138 | { |
1139 | if (!row->enabled_p) | |
1140 | { | |
59ea14cd | 1141 | bool rp = row->reversed_p; |
5009f85e | 1142 | |
5f5c8ee5 GM |
1143 | clear_glyph_row (row); |
1144 | row->enabled_p = 1; | |
5009f85e | 1145 | row->reversed_p = rp; |
5f5c8ee5 GM |
1146 | } |
1147 | } | |
1148 | ||
1149 | ||
1150 | /* Return a hash code for glyph row ROW. */ | |
1151 | ||
2f7c71a1 | 1152 | static int |
971de7fb | 1153 | line_hash_code (struct glyph_row *row) |
5f5c8ee5 GM |
1154 | { |
1155 | int hash = 0; | |
177c0ea7 | 1156 | |
5f5c8ee5 GM |
1157 | if (row->enabled_p) |
1158 | { | |
4cecaab8 MB |
1159 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1160 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1161 | ||
1162 | while (glyph < end) | |
1163 | { | |
1164 | int c = glyph->u.ch; | |
1165 | int face_id = glyph->face_id; | |
daf01701 | 1166 | if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
4cecaab8 MB |
1167 | c -= SPACEGLYPH; |
1168 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1169 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1170 | ++glyph; | |
1171 | } | |
5f5c8ee5 | 1172 | |
4cecaab8 MB |
1173 | if (hash == 0) |
1174 | hash = 1; | |
5f5c8ee5 GM |
1175 | } |
1176 | ||
1177 | return hash; | |
1178 | } | |
1179 | ||
1180 | ||
153a073c | 1181 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1182 | the number of characters in the line. If must_write_spaces is |
1183 | zero, leading and trailing spaces are ignored. */ | |
1184 | ||
dfd153ae | 1185 | static int |
971de7fb | 1186 | line_draw_cost (struct glyph_matrix *matrix, int vpos) |
5f5c8ee5 GM |
1187 | { |
1188 | struct glyph_row *row = matrix->rows + vpos; | |
1189 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1190 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1191 | int len; | |
1192 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
ca9ce8f2 | 1193 | ptrdiff_t glyph_table_len = GLYPH_TABLE_LENGTH; |
5f5c8ee5 GM |
1194 | |
1195 | /* Ignore trailing and leading spaces if we can. */ | |
daf01701 | 1196 | if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
5f5c8ee5 GM |
1197 | { |
1198 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1199 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1200 | --end; |
1201 | ||
177c0ea7 | 1202 | /* All blank line. */ |
5f5c8ee5 GM |
1203 | if (end == beg) |
1204 | return 0; | |
1205 | ||
1206 | /* Skip over leading spaces. */ | |
1207 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1208 | ++beg; | |
1209 | } | |
1210 | ||
1211 | /* If we don't have a glyph-table, each glyph is one character, | |
1212 | so return the number of glyphs. */ | |
1213 | if (glyph_table_base == 0) | |
1214 | len = end - beg; | |
1215 | else | |
1216 | { | |
1217 | /* Otherwise, scan the glyphs and accumulate their total length | |
1218 | in LEN. */ | |
1219 | len = 0; | |
1220 | while (beg < end) | |
1221 | { | |
3fc809e2 | 1222 | GLYPH g; |
177c0ea7 | 1223 | |
3fc809e2 KS |
1224 | SET_GLYPH_FROM_CHAR_GLYPH (g, *beg); |
1225 | ||
565b39a8 | 1226 | if (GLYPH_INVALID_P (g) |
42186983 | 1227 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) |
5f5c8ee5 GM |
1228 | len += 1; |
1229 | else | |
1230 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1231 | |
5f5c8ee5 GM |
1232 | ++beg; |
1233 | } | |
1234 | } | |
177c0ea7 | 1235 | |
5f5c8ee5 GM |
1236 | return len; |
1237 | } | |
1238 | ||
1239 | ||
59ea14cd PE |
1240 | /* Return true if the glyph rows A and B have equal contents. |
1241 | MOUSE_FACE_P means compare the mouse_face_p flags of A and B, too. */ | |
5f5c8ee5 | 1242 | |
b0ab8123 | 1243 | static bool |
59ea14cd | 1244 | row_equal_p (struct glyph_row *a, struct glyph_row *b, bool mouse_face_p) |
5f5c8ee5 | 1245 | { |
a54e2c05 DA |
1246 | eassert (verify_row_hash (a)); |
1247 | eassert (verify_row_hash (b)); | |
7a7270dd | 1248 | |
5f5c8ee5 GM |
1249 | if (a == b) |
1250 | return 1; | |
1251 | else if (a->hash != b->hash) | |
1252 | return 0; | |
1253 | else | |
1254 | { | |
1255 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1256 | int area; | |
1257 | ||
e4e0bee9 GM |
1258 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1259 | return 0; | |
1260 | ||
5f5c8ee5 GM |
1261 | /* Compare glyphs. */ |
1262 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1263 | { | |
1264 | if (a->used[area] != b->used[area]) | |
1265 | return 0; | |
177c0ea7 | 1266 | |
5f5c8ee5 GM |
1267 | a_glyph = a->glyphs[area]; |
1268 | a_end = a_glyph + a->used[area]; | |
1269 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1270 | |
5f5c8ee5 GM |
1271 | while (a_glyph < a_end |
1272 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1273 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1274 | |
5f5c8ee5 GM |
1275 | if (a_glyph != a_end) |
1276 | return 0; | |
1277 | } | |
1278 | ||
6b61353c KH |
1279 | if (a->fill_line_p != b->fill_line_p |
1280 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1281 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
1282 | || a->left_fringe_face_id != b->left_fringe_face_id | |
e61124cd | 1283 | || a->left_fringe_offset != b->left_fringe_offset |
6b61353c KH |
1284 | || a->right_fringe_bitmap != b->right_fringe_bitmap |
1285 | || a->right_fringe_face_id != b->right_fringe_face_id | |
e61124cd YM |
1286 | || a->right_fringe_offset != b->right_fringe_offset |
1287 | || a->fringe_bitmap_periodic_p != b->fringe_bitmap_periodic_p | |
3d4a365f | 1288 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
6b61353c | 1289 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1290 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1291 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1292 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
918f4159 | 1293 | || a->reversed_p != b->reversed_p |
5f5c8ee5 GM |
1294 | /* Different partially visible characters on left margin. */ |
1295 | || a->x != b->x | |
1296 | /* Different height. */ | |
1297 | || a->ascent != b->ascent | |
408f5064 GM |
1298 | || a->phys_ascent != b->phys_ascent |
1299 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1300 | || a->visible_height != b->visible_height) |
1301 | return 0; | |
1302 | } | |
1303 | ||
1304 | return 1; | |
1305 | } | |
1306 | ||
1307 | ||
1308 | \f | |
1309 | /*********************************************************************** | |
1310 | Glyph Pool | |
1311 | ||
1312 | See dispextern.h for an overall explanation of glyph pools. | |
1313 | ***********************************************************************/ | |
1314 | ||
1315 | /* Allocate a glyph_pool structure. The structure returned is | |
1316 | initialized with zeros. The global variable glyph_pool_count is | |
1317 | incremented for each pool allocated. */ | |
1318 | ||
1319 | static struct glyph_pool * | |
971de7fb | 1320 | new_glyph_pool (void) |
5f5c8ee5 | 1321 | { |
23f86fce | 1322 | struct glyph_pool *result = xzalloc (sizeof *result); |
177c0ea7 | 1323 | |
5f5c8ee5 GM |
1324 | /* For memory leak and double deletion checking. */ |
1325 | ++glyph_pool_count; | |
177c0ea7 | 1326 | |
5f5c8ee5 GM |
1327 | return result; |
1328 | } | |
1329 | ||
1330 | ||
1331 | /* Free a glyph_pool structure POOL. The function may be called with | |
1332 | a null POOL pointer. The global variable glyph_pool_count is | |
1333 | decremented with every pool structure freed. If this count gets | |
1334 | negative, more structures were freed than allocated, i.e. one | |
1335 | structure must have been freed more than once or a bogus pointer | |
1336 | was passed to free_glyph_pool. */ | |
1337 | ||
1338 | static void | |
971de7fb | 1339 | free_glyph_pool (struct glyph_pool *pool) |
5f5c8ee5 GM |
1340 | { |
1341 | if (pool) | |
1342 | { | |
153a073c | 1343 | /* More freed than allocated? */ |
5f5c8ee5 | 1344 | --glyph_pool_count; |
a54e2c05 | 1345 | eassert (glyph_pool_count >= 0); |
5f5c8ee5 GM |
1346 | |
1347 | xfree (pool->glyphs); | |
1348 | xfree (pool); | |
1349 | } | |
1350 | } | |
1351 | ||
1352 | ||
1353 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1354 | columns we need. This function never shrinks a pool. The only | |
1355 | case in which this would make sense, would be when a frame's size | |
1356 | is changed from a large value to a smaller one. But, if someone | |
1357 | does it once, we can expect that he will do it again. | |
1358 | ||
59ea14cd | 1359 | Return true if the pool changed in a way which makes |
5f5c8ee5 GM |
1360 | re-adjusting window glyph matrices necessary. */ |
1361 | ||
59ea14cd | 1362 | static bool |
971de7fb | 1363 | realloc_glyph_pool (struct glyph_pool *pool, struct dim matrix_dim) |
5f5c8ee5 | 1364 | { |
ca9ce8f2 | 1365 | ptrdiff_t needed; |
59ea14cd | 1366 | bool changed_p; |
5f5c8ee5 GM |
1367 | |
1368 | changed_p = (pool->glyphs == 0 | |
1369 | || matrix_dim.height != pool->nrows | |
1370 | || matrix_dim.width != pool->ncolumns); | |
1371 | ||
1372 | /* Enlarge the glyph pool. */ | |
ca9ce8f2 | 1373 | needed = matrix_dim.width; |
0065d054 PE |
1374 | if (INT_MULTIPLY_OVERFLOW (needed, matrix_dim.height)) |
1375 | memory_full (SIZE_MAX); | |
ca9ce8f2 | 1376 | needed *= matrix_dim.height; |
5f5c8ee5 GM |
1377 | if (needed > pool->nglyphs) |
1378 | { | |
0065d054 PE |
1379 | ptrdiff_t old_nglyphs = pool->nglyphs; |
1380 | pool->glyphs = xpalloc (pool->glyphs, &pool->nglyphs, | |
1381 | needed - old_nglyphs, -1, sizeof *pool->glyphs); | |
1382 | memset (pool->glyphs + old_nglyphs, 0, | |
1383 | (pool->nglyphs - old_nglyphs) * sizeof *pool->glyphs); | |
5f5c8ee5 GM |
1384 | } |
1385 | ||
153a073c | 1386 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1387 | to do sanity checks, and (b) the number of columns determines |
1388 | where rows in the frame matrix start---this must be available to | |
1389 | determine pointers to rows of window sub-matrices. */ | |
1390 | pool->nrows = matrix_dim.height; | |
1391 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1392 | |
5f5c8ee5 GM |
1393 | return changed_p; |
1394 | } | |
1395 | ||
1396 | ||
1397 | \f | |
1398 | /*********************************************************************** | |
1399 | Debug Code | |
1400 | ***********************************************************************/ | |
1401 | ||
e509cfa6 | 1402 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 1403 | |
a13396c9 | 1404 | |
28d440ab KL |
1405 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1406 | XXX Maybe this should be changed to flush the current terminal instead of | |
1407 | stdout. | |
1408 | */ | |
a13396c9 | 1409 | |
85fece3e PE |
1410 | void flush_stdout (void) EXTERNALLY_VISIBLE; |
1411 | ||
a13396c9 | 1412 | void |
59fc5cf9 | 1413 | flush_stdout (void) |
a13396c9 GM |
1414 | { |
1415 | fflush (stdout); | |
1416 | } | |
1417 | ||
1418 | ||
5f5c8ee5 GM |
1419 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1420 | pointer has been lost, e.g. by using a structure assignment between | |
1421 | rows, at least one pointer must occur more than once in the rows of | |
1422 | MATRIX. */ | |
1423 | ||
1424 | void | |
59fc5cf9 | 1425 | check_matrix_pointer_lossage (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
1426 | { |
1427 | int i, j; | |
177c0ea7 | 1428 | |
5f5c8ee5 GM |
1429 | for (i = 0; i < matrix->nrows; ++i) |
1430 | for (j = 0; j < matrix->nrows; ++j) | |
a54e2c05 | 1431 | eassert (i == j |
5f5c8ee5 GM |
1432 | || (matrix->rows[i].glyphs[TEXT_AREA] |
1433 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1434 | } | |
1435 | ||
1436 | ||
1437 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1438 | ||
1439 | struct glyph_row * | |
59fc5cf9 | 1440 | matrix_row (struct glyph_matrix *matrix, int row) |
5f5c8ee5 | 1441 | { |
a54e2c05 DA |
1442 | eassert (matrix && matrix->rows); |
1443 | eassert (row >= 0 && row < matrix->nrows); | |
5f5c8ee5 GM |
1444 | |
1445 | /* That's really too slow for normal testing because this function | |
1446 | is called almost everywhere. Although---it's still astonishingly | |
1447 | fast, so it is valuable to have for debugging purposes. */ | |
1448 | #if 0 | |
1449 | check_matrix_pointer_lossage (matrix); | |
1450 | #endif | |
177c0ea7 | 1451 | |
5f5c8ee5 GM |
1452 | return matrix->rows + row; |
1453 | } | |
1454 | ||
1455 | ||
1456 | #if 0 /* This function makes invalid assumptions when text is | |
1457 | partially invisible. But it might come handy for debugging | |
1458 | nevertheless. */ | |
1459 | ||
1460 | /* Check invariants that must hold for an up to date current matrix of | |
1461 | window W. */ | |
1462 | ||
1463 | static void | |
59fc5cf9 | 1464 | check_matrix_invariants (struct window *w) |
5f5c8ee5 GM |
1465 | { |
1466 | struct glyph_matrix *matrix = w->current_matrix; | |
1467 | int yb = window_text_bottom_y (w); | |
1468 | struct glyph_row *row = matrix->rows; | |
1469 | struct glyph_row *last_text_row = NULL; | |
1470 | struct buffer *saved = current_buffer; | |
d3d50620 | 1471 | struct buffer *buffer = XBUFFER (w->buffer); |
5f5c8ee5 | 1472 | int c; |
177c0ea7 | 1473 | |
5f5c8ee5 GM |
1474 | /* This can sometimes happen for a fresh window. */ |
1475 | if (matrix->nrows < 2) | |
1476 | return; | |
1477 | ||
1478 | set_buffer_temp (buffer); | |
1479 | ||
1480 | /* Note: last row is always reserved for the mode line. */ | |
1481 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1482 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1483 | { | |
1484 | struct glyph_row *next = row + 1; | |
1485 | ||
1486 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1487 | last_text_row = row; | |
1488 | ||
1489 | /* Check that character and byte positions are in sync. */ | |
a54e2c05 | 1490 | eassert (MATRIX_ROW_START_BYTEPOS (row) |
5f5c8ee5 | 1491 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); |
a54e2c05 | 1492 | eassert (BYTEPOS (row->start.pos) |
d36fe237 | 1493 | == CHAR_TO_BYTE (CHARPOS (row->start.pos))); |
5f5c8ee5 GM |
1494 | |
1495 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1496 | have such a position temporarily in case of a minibuffer | |
1497 | displaying something like `[Sole completion]' at its end. */ | |
1498 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
d36fe237 | 1499 | { |
a54e2c05 | 1500 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
d36fe237 | 1501 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); |
a54e2c05 | 1502 | eassert (BYTEPOS (row->end.pos) |
d36fe237 EZ |
1503 | == CHAR_TO_BYTE (CHARPOS (row->end.pos))); |
1504 | } | |
5f5c8ee5 GM |
1505 | |
1506 | /* Check that end position of `row' is equal to start position | |
1507 | of next row. */ | |
1508 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1509 | { | |
a54e2c05 | 1510 | eassert (MATRIX_ROW_END_CHARPOS (row) |
5f5c8ee5 | 1511 | == MATRIX_ROW_START_CHARPOS (next)); |
a54e2c05 | 1512 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
5f5c8ee5 | 1513 | == MATRIX_ROW_START_BYTEPOS (next)); |
a54e2c05 DA |
1514 | eassert (CHARPOS (row->end.pos) == CHARPOS (next->start.pos)); |
1515 | eassert (BYTEPOS (row->end.pos) == BYTEPOS (next->start.pos)); | |
5f5c8ee5 GM |
1516 | } |
1517 | row = next; | |
1518 | } | |
1519 | ||
a54e2c05 DA |
1520 | eassert (w->current_matrix->nrows == w->desired_matrix->nrows); |
1521 | eassert (w->desired_matrix->rows != NULL); | |
5f5c8ee5 GM |
1522 | set_buffer_temp (saved); |
1523 | } | |
1524 | ||
1525 | #endif /* 0 */ | |
1526 | ||
e509cfa6 | 1527 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
1528 | |
1529 | ||
1530 | \f | |
1531 | /********************************************************************** | |
1532 | Allocating/ Adjusting Glyph Matrices | |
1533 | **********************************************************************/ | |
1534 | ||
1535 | /* Allocate glyph matrices over a window tree for a frame-based | |
1536 | redisplay | |
1537 | ||
1538 | X and Y are column/row within the frame glyph matrix where | |
1539 | sub-matrices for the window tree rooted at WINDOW must be | |
59ea14cd | 1540 | allocated. DIM_ONLY_P means that the caller of this |
8ce2650d YM |
1541 | function is only interested in the result matrix dimension, and |
1542 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1543 | |
1544 | The function returns the total width/height of the sub-matrices of | |
1545 | the window tree. If called on a frame root window, the computation | |
1546 | will take the mini-buffer window into account. | |
1547 | ||
1548 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1549 | ||
1550 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1551 | glyph matrices yet, and | |
1552 | ||
1553 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1554 | any window in the tree will be changed or have been changed (see | |
153a073c | 1555 | DIM_ONLY_P) |
5f5c8ee5 GM |
1556 | |
1557 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1558 | function. | |
1559 | ||
1560 | Windows are arranged into chains of windows on the same level | |
1561 | through the next fields of window structures. Such a level can be | |
1562 | either a sequence of horizontally adjacent windows from left to | |
1563 | right, or a sequence of vertically adjacent windows from top to | |
1564 | bottom. Each window in a horizontal sequence can be either a leaf | |
1565 | window or a vertical sequence; a window in a vertical sequence can | |
1566 | be either a leaf or a horizontal sequence. All windows in a | |
1567 | horizontal sequence have the same height, and all windows in a | |
1568 | vertical sequence have the same width. | |
1569 | ||
1570 | This function uses, for historical reasons, a more general | |
1571 | algorithm to determine glyph matrix dimensions that would be | |
1572 | necessary. | |
1573 | ||
1574 | The matrix height of a horizontal sequence is determined by the | |
1575 | maximum height of any matrix in the sequence. The matrix width of | |
1576 | a horizontal sequence is computed by adding up matrix widths of | |
1577 | windows in the sequence. | |
1578 | ||
1579 | |<------- result width ------->| | |
1580 | +---------+----------+---------+ --- | |
1581 | | | | | | | |
1582 | | | | | | |
1583 | +---------+ | | result height | |
1584 | | +---------+ | |
1585 | | | | | |
1586 | +----------+ --- | |
1587 | ||
1588 | The matrix width of a vertical sequence is the maximum matrix width | |
1589 | of any window in the sequence. Its height is computed by adding up | |
1590 | matrix heights of windows in the sequence. | |
1591 | ||
1592 | |<---- result width -->| | |
1593 | +---------+ --- | |
1594 | | | | | |
1595 | | | | | |
1596 | +---------+--+ | | |
1597 | | | | | |
1598 | | | result height | |
1599 | | | | |
1600 | +------------+---------+ | | |
1601 | | | | | |
1602 | | | | | |
1603 | +------------+---------+ --- */ | |
1604 | ||
1605 | /* Bit indicating that a new matrix will be allocated or has been | |
1606 | allocated. */ | |
1607 | ||
1608 | #define NEW_LEAF_MATRIX (1 << 0) | |
1609 | ||
1610 | /* Bit indicating that a matrix will or has changed its location or | |
1611 | size. */ | |
1612 | ||
1613 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1614 | ||
1615 | static struct dim | |
6f704c76 | 1616 | allocate_matrices_for_frame_redisplay (Lisp_Object window, int x, int y, |
59ea14cd | 1617 | bool dim_only_p, int *window_change_flags) |
5f5c8ee5 GM |
1618 | { |
1619 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1620 | int x0 = x, y0 = y; | |
1621 | int wmax = 0, hmax = 0; | |
1622 | struct dim total; | |
1623 | struct dim dim; | |
1624 | struct window *w; | |
59ea14cd | 1625 | bool in_horz_combination_p; |
5f5c8ee5 GM |
1626 | |
1627 | /* What combination is WINDOW part of? Compute this once since the | |
1628 | result is the same for all windows in the `next' chain. The | |
1629 | special case of a root window (parent equal to nil) is treated | |
1630 | like a vertical combination because a root window's `next' | |
1631 | points to the mini-buffer window, if any, which is arranged | |
1632 | vertically below other windows. */ | |
1633 | in_horz_combination_p | |
d3d50620 DA |
1634 | = (!NILP (XWINDOW (window)->parent) |
1635 | && !NILP (XWINDOW (XWINDOW (window)->parent)->hchild)); | |
5f5c8ee5 GM |
1636 | |
1637 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1638 | do |
5f5c8ee5 GM |
1639 | { |
1640 | w = XWINDOW (window); | |
1641 | ||
1642 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1643 | on whether this is a combination or a leaf window. */ |
d3d50620 DA |
1644 | if (!NILP (w->hchild)) |
1645 | dim = allocate_matrices_for_frame_redisplay (w->hchild, x, y, | |
5f5c8ee5 GM |
1646 | dim_only_p, |
1647 | window_change_flags); | |
d3d50620 DA |
1648 | else if (!NILP (w->vchild)) |
1649 | dim = allocate_matrices_for_frame_redisplay (w->vchild, x, y, | |
5f5c8ee5 GM |
1650 | dim_only_p, |
1651 | window_change_flags); | |
1652 | else | |
1653 | { | |
1654 | /* If not already done, allocate sub-matrix structures. */ | |
1655 | if (w->desired_matrix == NULL) | |
1656 | { | |
1657 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1658 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1659 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1660 | } | |
177c0ea7 | 1661 | |
5f5c8ee5 GM |
1662 | /* Width and height MUST be chosen so that there are no |
1663 | holes in the frame matrix. */ | |
5d3cc43c GM |
1664 | dim.width = required_matrix_width (w); |
1665 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1666 | |
1667 | /* Will matrix be re-allocated? */ | |
1668 | if (x != w->desired_matrix->matrix_x | |
1669 | || y != w->desired_matrix->matrix_y | |
1670 | || dim.width != w->desired_matrix->matrix_w | |
1671 | || dim.height != w->desired_matrix->matrix_h | |
1672 | || (margin_glyphs_to_reserve (w, dim.width, | |
d3d50620 | 1673 | w->left_margin_cols) |
5f5c8ee5 GM |
1674 | != w->desired_matrix->left_margin_glyphs) |
1675 | || (margin_glyphs_to_reserve (w, dim.width, | |
d3d50620 | 1676 | w->right_margin_cols) |
5f5c8ee5 GM |
1677 | != w->desired_matrix->right_margin_glyphs)) |
1678 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1679 | ||
1680 | /* Actually change matrices, if allowed. Do not consider | |
1681 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1682 | may have been changed which we don't now here. We trust | |
59ea14cd | 1683 | that we only will be called with DIM_ONLY_P when |
5f5c8ee5 GM |
1684 | necessary. */ |
1685 | if (!dim_only_p) | |
1686 | { | |
1687 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1688 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1689 | } | |
1690 | } | |
1691 | ||
1692 | /* If we are part of a horizontal combination, advance x for | |
1693 | windows to the right of W; otherwise advance y for windows | |
1694 | below W. */ | |
1695 | if (in_horz_combination_p) | |
1696 | x += dim.width; | |
177c0ea7 | 1697 | else |
5f5c8ee5 GM |
1698 | y += dim.height; |
1699 | ||
1700 | /* Remember maximum glyph matrix dimensions. */ | |
1701 | wmax = max (wmax, dim.width); | |
1702 | hmax = max (hmax, dim.height); | |
1703 | ||
1704 | /* Next window on same level. */ | |
d3d50620 | 1705 | window = w->next; |
5f5c8ee5 GM |
1706 | } |
1707 | while (!NILP (window)); | |
1708 | ||
1709 | /* Set `total' to the total glyph matrix dimension of this window | |
1710 | level. In a vertical combination, the width is the width of the | |
1711 | widest window; the height is the y we finally reached, corrected | |
1712 | by the y we started with. In a horizontal combination, the total | |
1713 | height is the height of the tallest window, and the width is the | |
1714 | x we finally reached, corrected by the x we started with. */ | |
1715 | if (in_horz_combination_p) | |
1716 | { | |
1717 | total.width = x - x0; | |
1718 | total.height = hmax; | |
1719 | } | |
177c0ea7 | 1720 | else |
5f5c8ee5 GM |
1721 | { |
1722 | total.width = wmax; | |
1723 | total.height = y - y0; | |
1724 | } | |
1725 | ||
1726 | return total; | |
1727 | } | |
1728 | ||
1729 | ||
5d3cc43c GM |
1730 | /* Return the required height of glyph matrices for window W. */ |
1731 | ||
2f7c71a1 | 1732 | static int |
971de7fb | 1733 | required_matrix_height (struct window *w) |
5d3cc43c GM |
1734 | { |
1735 | #ifdef HAVE_WINDOW_SYSTEM | |
d3d50620 | 1736 | struct frame *f = XFRAME (w->frame); |
177c0ea7 | 1737 | |
5d3cc43c GM |
1738 | if (FRAME_WINDOW_P (f)) |
1739 | { | |
1740 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1ea40aa2 | 1741 | int window_pixel_height = window_box_height (w) + eabs (w->vscroll); |
5d3cc43c | 1742 | return (((window_pixel_height + ch_height - 1) |
cc834cf9 | 1743 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
1744 | /* One partially visible line at the top and |
1745 | bottom of the window. */ | |
1746 | + 2 | |
153a073c | 1747 | /* 2 for header and mode line. */ |
5d3cc43c GM |
1748 | + 2); |
1749 | } | |
1750 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 1751 | |
7df02016 | 1752 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
1753 | } |
1754 | ||
1755 | ||
1756 | /* Return the required width of glyph matrices for window W. */ | |
1757 | ||
2f7c71a1 | 1758 | static int |
971de7fb | 1759 | required_matrix_width (struct window *w) |
5d3cc43c GM |
1760 | { |
1761 | #ifdef HAVE_WINDOW_SYSTEM | |
d3d50620 | 1762 | struct frame *f = XFRAME (w->frame); |
5d3cc43c GM |
1763 | if (FRAME_WINDOW_P (f)) |
1764 | { | |
1765 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 1766 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 1767 | |
5d3cc43c GM |
1768 | /* Compute number of glyphs needed in a glyph row. */ |
1769 | return (((window_pixel_width + ch_width - 1) | |
cc834cf9 | 1770 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
1771 | /* 2 partially visible columns in the text area. */ |
1772 | + 2 | |
1773 | /* One partially visible column at the right | |
1774 | edge of each marginal area. */ | |
1775 | + 1 + 1); | |
1776 | } | |
1777 | #endif /* HAVE_WINDOW_SYSTEM */ | |
1778 | ||
d3d50620 | 1779 | return XINT (w->total_cols); |
5d3cc43c GM |
1780 | } |
1781 | ||
1782 | ||
5f5c8ee5 | 1783 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 1784 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 1785 | |
5f5c8ee5 | 1786 | static void |
971de7fb | 1787 | allocate_matrices_for_window_redisplay (struct window *w) |
5f5c8ee5 | 1788 | { |
5f5c8ee5 GM |
1789 | while (w) |
1790 | { | |
d3d50620 DA |
1791 | if (!NILP (w->vchild)) |
1792 | allocate_matrices_for_window_redisplay (XWINDOW (w->vchild)); | |
1793 | else if (!NILP (w->hchild)) | |
1794 | allocate_matrices_for_window_redisplay (XWINDOW (w->hchild)); | |
5f5c8ee5 GM |
1795 | else |
1796 | { | |
1797 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
1798 | struct dim dim; |
1799 | ||
1800 | /* If matrices are not yet allocated, allocate them now. */ | |
1801 | if (w->desired_matrix == NULL) | |
1802 | { | |
1803 | w->desired_matrix = new_glyph_matrix (NULL); | |
1804 | w->current_matrix = new_glyph_matrix (NULL); | |
1805 | } | |
1806 | ||
5d3cc43c GM |
1807 | dim.width = required_matrix_width (w); |
1808 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1809 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
1810 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
1811 | } | |
177c0ea7 | 1812 | |
d3d50620 | 1813 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
5f5c8ee5 GM |
1814 | } |
1815 | } | |
1816 | ||
1817 | ||
1818 | /* Re-allocate/ re-compute glyph matrices on frame F. If F is null, | |
1819 | do it for all frames; otherwise do it just for the given frame. | |
1820 | This function must be called when a new frame is created, its size | |
1821 | changes, or its window configuration changes. */ | |
1822 | ||
1823 | void | |
971de7fb | 1824 | adjust_glyphs (struct frame *f) |
5f5c8ee5 | 1825 | { |
408f5064 GM |
1826 | /* Block input so that expose events and other events that access |
1827 | glyph matrices are not processed while we are changing them. */ | |
4d7e6e51 | 1828 | block_input (); |
408f5064 | 1829 | |
5f5c8ee5 GM |
1830 | if (f) |
1831 | adjust_frame_glyphs (f); | |
1832 | else | |
1833 | { | |
1834 | Lisp_Object tail, lisp_frame; | |
177c0ea7 | 1835 | |
5f5c8ee5 GM |
1836 | FOR_EACH_FRAME (tail, lisp_frame) |
1837 | adjust_frame_glyphs (XFRAME (lisp_frame)); | |
1838 | } | |
408f5064 | 1839 | |
4d7e6e51 | 1840 | unblock_input (); |
5f5c8ee5 GM |
1841 | } |
1842 | ||
5f5c8ee5 GM |
1843 | /* Allocate/reallocate glyph matrices of a single frame F. */ |
1844 | ||
1845 | static void | |
971de7fb | 1846 | adjust_frame_glyphs (struct frame *f) |
5f5c8ee5 GM |
1847 | { |
1848 | if (FRAME_WINDOW_P (f)) | |
1849 | adjust_frame_glyphs_for_window_redisplay (f); | |
1850 | else | |
1851 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 1852 | |
b09cca6a | 1853 | /* Don't forget the buffer for decode_mode_spec. */ |
5f5c8ee5 GM |
1854 | adjust_decode_mode_spec_buffer (f); |
1855 | ||
1856 | f->glyphs_initialized_p = 1; | |
1857 | } | |
1858 | ||
59ea14cd | 1859 | /* Return true if any window in the tree has nonzero window margins. See |
075757cc | 1860 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ |
59ea14cd | 1861 | static bool |
971de7fb | 1862 | showing_window_margins_p (struct window *w) |
075757cc CY |
1863 | { |
1864 | while (w) | |
1865 | { | |
d3d50620 | 1866 | if (!NILP (w->hchild)) |
075757cc | 1867 | { |
d3d50620 | 1868 | if (showing_window_margins_p (XWINDOW (w->hchild))) |
075757cc CY |
1869 | return 1; |
1870 | } | |
d3d50620 | 1871 | else if (!NILP (w->vchild)) |
075757cc | 1872 | { |
d3d50620 | 1873 | if (showing_window_margins_p (XWINDOW (w->vchild))) |
075757cc CY |
1874 | return 1; |
1875 | } | |
d3d50620 DA |
1876 | else if (!NILP (w->left_margin_cols) |
1877 | || !NILP (w->right_margin_cols)) | |
075757cc | 1878 | return 1; |
3fc809e2 | 1879 | |
d3d50620 | 1880 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
075757cc CY |
1881 | } |
1882 | return 0; | |
1883 | } | |
1884 | ||
5f5c8ee5 | 1885 | |
c9f00270 GM |
1886 | /* In the window tree with root W, build current matrices of leaf |
1887 | windows from the frame's current matrix. */ | |
1888 | ||
1889 | static void | |
971de7fb | 1890 | fake_current_matrices (Lisp_Object window) |
c9f00270 GM |
1891 | { |
1892 | struct window *w; | |
177c0ea7 | 1893 | |
d3d50620 | 1894 | for (; !NILP (window); window = w->next) |
c9f00270 GM |
1895 | { |
1896 | w = XWINDOW (window); | |
177c0ea7 | 1897 | |
d3d50620 DA |
1898 | if (!NILP (w->hchild)) |
1899 | fake_current_matrices (w->hchild); | |
1900 | else if (!NILP (w->vchild)) | |
1901 | fake_current_matrices (w->vchild); | |
c9f00270 GM |
1902 | else |
1903 | { | |
1904 | int i; | |
d3d50620 | 1905 | struct frame *f = XFRAME (w->frame); |
c9f00270 GM |
1906 | struct glyph_matrix *m = w->current_matrix; |
1907 | struct glyph_matrix *fm = f->current_matrix; | |
1908 | ||
a54e2c05 DA |
1909 | eassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
1910 | eassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 1911 | |
c9f00270 GM |
1912 | for (i = 0; i < m->matrix_h; ++i) |
1913 | { | |
1914 | struct glyph_row *r = m->rows + i; | |
7df02016 | 1915 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 | 1916 | |
a54e2c05 | 1917 | eassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] |
c9f00270 GM |
1918 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); |
1919 | ||
1920 | r->enabled_p = fr->enabled_p; | |
1921 | if (r->enabled_p) | |
1922 | { | |
1923 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
1924 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
1925 | r->used[TEXT_AREA] = (m->matrix_w | |
1926 | - r->used[LEFT_MARGIN_AREA] | |
1927 | - r->used[RIGHT_MARGIN_AREA]); | |
1928 | r->mode_line_p = 0; | |
c9f00270 GM |
1929 | } |
1930 | } | |
1931 | } | |
1932 | } | |
1933 | } | |
1934 | ||
1935 | ||
bccee4f2 | 1936 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 1937 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 1938 | |
bccee4f2 | 1939 | static struct glyph_matrix * |
971de7fb | 1940 | save_current_matrix (struct frame *f) |
c9f00270 | 1941 | { |
bccee4f2 | 1942 | int i; |
38182d90 | 1943 | struct glyph_matrix *saved = xzalloc (sizeof *saved); |
bccee4f2 | 1944 | saved->nrows = f->current_matrix->nrows; |
23f86fce | 1945 | saved->rows = xzalloc (saved->nrows * sizeof *saved->rows); |
bccee4f2 GM |
1946 | |
1947 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 1948 | { |
bccee4f2 GM |
1949 | struct glyph_row *from = f->current_matrix->rows + i; |
1950 | struct glyph_row *to = saved->rows + i; | |
dfd153ae | 1951 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
23f86fce | 1952 | to->glyphs[TEXT_AREA] = xmalloc (nbytes); |
72af86bd | 1953 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
bccee4f2 | 1954 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
e797dea6 | 1955 | } |
bccee4f2 GM |
1956 | |
1957 | return saved; | |
1958 | } | |
1959 | ||
1960 | ||
1961 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
1962 | and free memory associated with SAVED. */ | |
1963 | ||
1964 | static void | |
971de7fb | 1965 | restore_current_matrix (struct frame *f, struct glyph_matrix *saved) |
bccee4f2 GM |
1966 | { |
1967 | int i; | |
1968 | ||
1969 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 1970 | { |
bccee4f2 GM |
1971 | struct glyph_row *from = saved->rows + i; |
1972 | struct glyph_row *to = f->current_matrix->rows + i; | |
dfd153ae | 1973 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
72af86bd | 1974 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
e797dea6 | 1975 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
bccee4f2 | 1976 | xfree (from->glyphs[TEXT_AREA]); |
e797dea6 | 1977 | } |
177c0ea7 | 1978 | |
bccee4f2 GM |
1979 | xfree (saved->rows); |
1980 | xfree (saved); | |
c9f00270 GM |
1981 | } |
1982 | ||
1983 | ||
bccee4f2 | 1984 | |
5f5c8ee5 GM |
1985 | /* Allocate/reallocate glyph matrices of a single frame F for |
1986 | frame-based redisplay. */ | |
1987 | ||
1988 | static void | |
971de7fb | 1989 | adjust_frame_glyphs_for_frame_redisplay (struct frame *f) |
5f5c8ee5 | 1990 | { |
5f5c8ee5 | 1991 | struct dim matrix_dim; |
59ea14cd | 1992 | bool pool_changed_p; |
5f5c8ee5 GM |
1993 | int window_change_flags; |
1994 | int top_window_y; | |
1995 | ||
1996 | if (!FRAME_LIVE_P (f)) | |
1997 | return; | |
1998 | ||
5f5c8ee5 GM |
1999 | top_window_y = FRAME_TOP_MARGIN (f); |
2000 | ||
2001 | /* Allocate glyph pool structures if not already done. */ | |
2002 | if (f->desired_pool == NULL) | |
2003 | { | |
2004 | f->desired_pool = new_glyph_pool (); | |
2005 | f->current_pool = new_glyph_pool (); | |
2006 | } | |
2007 | ||
2008 | /* Allocate frames matrix structures if needed. */ | |
2009 | if (f->desired_matrix == NULL) | |
2010 | { | |
2011 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
2012 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
2013 | } | |
177c0ea7 | 2014 | |
5f5c8ee5 GM |
2015 | /* Compute window glyph matrices. (This takes the mini-buffer |
2016 | window into account). The result is the size of the frame glyph | |
2017 | matrix needed. The variable window_change_flags is set to a bit | |
2018 | mask indicating whether new matrices will be allocated or | |
2019 | existing matrices change their size or location within the frame | |
2020 | matrix. */ | |
2021 | window_change_flags = 0; | |
2022 | matrix_dim | |
2023 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
2024 | 0, top_window_y, | |
5d3cc43c | 2025 | 1, |
5f5c8ee5 GM |
2026 | &window_change_flags); |
2027 | ||
2028 | /* Add in menu bar lines, if any. */ | |
2029 | matrix_dim.height += top_window_y; | |
2030 | ||
2031 | /* Enlarge pools as necessary. */ | |
2032 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
2033 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
2034 | ||
177c0ea7 | 2035 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
2036 | absolutely necessary since it requires a frame redraw. */ |
2037 | if (pool_changed_p || window_change_flags) | |
2038 | { | |
2039 | /* Do it for window matrices. */ | |
2040 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 2041 | 0, top_window_y, 0, |
5f5c8ee5 GM |
2042 | &window_change_flags); |
2043 | ||
2044 | /* Size of frame matrices must equal size of frame. Note | |
2045 | that we are called for X frames with window widths NOT equal | |
2046 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
a54e2c05 | 2047 | eassert (matrix_dim.width == FRAME_COLS (f) |
7df02016 | 2048 | && matrix_dim.height == FRAME_LINES (f)); |
177c0ea7 | 2049 | |
e797dea6 GM |
2050 | /* Pointers to glyph memory in glyph rows are exchanged during |
2051 | the update phase of redisplay, which means in general that a | |
2052 | frame's current matrix consists of pointers into both the | |
2053 | desired and current glyph pool of the frame. Adjusting a | |
2054 | matrix sets the frame matrix up so that pointers are all into | |
2055 | the same pool. If we want to preserve glyph contents of the | |
2056 | current matrix over a call to adjust_glyph_matrix, we must | |
2057 | make a copy of the current glyphs, and restore the current | |
2058 | matrix' contents from that copy. */ | |
2059 | if (display_completed | |
2060 | && !FRAME_GARBAGED_P (f) | |
2061 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
2062 | && matrix_dim.height == f->current_matrix->matrix_h |
2063 | /* For some reason, the frame glyph matrix gets corrupted if | |
2064 | any of the windows contain margins. I haven't been able | |
2065 | to hunt down the reason, but for the moment this prevents | |
2066 | the problem from manifesting. -- cyd */ | |
d5c20fe8 | 2067 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) |
e797dea6 | 2068 | { |
bccee4f2 GM |
2069 | struct glyph_matrix *copy = save_current_matrix (f); |
2070 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2071 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2072 | restore_current_matrix (f, copy); |
e797dea6 GM |
2073 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2074 | } | |
c9f00270 | 2075 | else |
e797dea6 | 2076 | { |
bccee4f2 | 2077 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2078 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2079 | SET_FRAME_GARBAGED (f); | |
2080 | } | |
5f5c8ee5 GM |
2081 | } |
2082 | } | |
2083 | ||
2084 | ||
2085 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2086 | window-based redisplay. */ | |
2087 | ||
2088 | static void | |
971de7fb | 2089 | adjust_frame_glyphs_for_window_redisplay (struct frame *f) |
5f5c8ee5 | 2090 | { |
a54e2c05 | 2091 | eassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); |
177c0ea7 | 2092 | |
5f5c8ee5 | 2093 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2094 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2095 | |
8ce2650d | 2096 | #ifdef HAVE_X_WINDOWS |
5f5c8ee5 GM |
2097 | /* Allocate/ reallocate matrices of the dummy window used to display |
2098 | the menu bar under X when no X toolkit support is available. */ | |
488dd4c4 | 2099 | #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2100 | { |
2101 | /* Allocate a dummy window if not already done. */ | |
d2d37ddc | 2102 | struct window *w; |
e69b0960 | 2103 | if (NILP (f->menu_bar_window)) |
5f5c8ee5 | 2104 | { |
077288cf | 2105 | Lisp_Object frame; |
f00af5b1 | 2106 | fset_menu_bar_window (f, make_window ()); |
e69b0960 | 2107 | w = XWINDOW (f->menu_bar_window); |
077288cf | 2108 | XSETFRAME (frame, f); |
e8c17b81 | 2109 | wset_frame (w, frame); |
5f5c8ee5 GM |
2110 | w->pseudo_window_p = 1; |
2111 | } | |
2112 | else | |
e69b0960 | 2113 | w = XWINDOW (f->menu_bar_window); |
5f5c8ee5 GM |
2114 | |
2115 | /* Set window dimensions to frame dimensions and allocate or | |
2116 | adjust glyph matrices of W. */ | |
e8c17b81 PE |
2117 | wset_top_line (w, make_number (0)); |
2118 | wset_left_col (w, make_number (0)); | |
2119 | wset_total_lines (w, make_number (FRAME_MENU_BAR_LINES (f))); | |
2120 | wset_total_cols (w, make_number (FRAME_TOTAL_COLS (f))); | |
5d3cc43c | 2121 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2122 | } |
57714a86 YM |
2123 | #endif /* not USE_X_TOOLKIT && not USE_GTK */ |
2124 | #endif /* HAVE_X_WINDOWS */ | |
5f5c8ee5 | 2125 | |
488dd4c4 | 2126 | #ifndef USE_GTK |
d2d37ddc PE |
2127 | { |
2128 | /* Allocate/ reallocate matrices of the tool bar window. If we | |
2129 | don't have a tool bar window yet, make one. */ | |
2130 | struct window *w; | |
e69b0960 | 2131 | if (NILP (f->tool_bar_window)) |
d2d37ddc | 2132 | { |
077288cf | 2133 | Lisp_Object frame; |
f00af5b1 | 2134 | fset_tool_bar_window (f, make_window ()); |
e69b0960 | 2135 | w = XWINDOW (f->tool_bar_window); |
077288cf | 2136 | XSETFRAME (frame, f); |
e8c17b81 | 2137 | wset_frame (w, frame); |
d2d37ddc PE |
2138 | w->pseudo_window_p = 1; |
2139 | } | |
2140 | else | |
e69b0960 | 2141 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2142 | |
e8c17b81 PE |
2143 | wset_top_line (w, make_number (FRAME_MENU_BAR_LINES (f))); |
2144 | wset_left_col (w, make_number (0)); | |
2145 | wset_total_lines (w, make_number (FRAME_TOOL_BAR_LINES (f))); | |
2146 | wset_total_cols (w, make_number (FRAME_TOTAL_COLS (f))); | |
d2d37ddc PE |
2147 | allocate_matrices_for_window_redisplay (w); |
2148 | } | |
488dd4c4 | 2149 | #endif |
5f5c8ee5 GM |
2150 | } |
2151 | ||
2152 | ||
5f5c8ee5 GM |
2153 | /* Re-allocate buffer for decode_mode_spec on frame F. */ |
2154 | ||
2155 | static void | |
971de7fb | 2156 | adjust_decode_mode_spec_buffer (struct frame *f) |
5f5c8ee5 | 2157 | { |
38182d90 PE |
2158 | f->decode_mode_spec_buffer = xrealloc (f->decode_mode_spec_buffer, |
2159 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
5f5c8ee5 GM |
2160 | } |
2161 | ||
2162 | ||
2163 | \f | |
2164 | /********************************************************************** | |
2165 | Freeing Glyph Matrices | |
2166 | **********************************************************************/ | |
2167 | ||
2168 | /* Free glyph memory for a frame F. F may be null. This function can | |
2169 | be called for the same frame more than once. The root window of | |
2170 | F may be nil when this function is called. This is the case when | |
2171 | the function is called when F is destroyed. */ | |
2172 | ||
2173 | void | |
971de7fb | 2174 | free_glyphs (struct frame *f) |
5f5c8ee5 GM |
2175 | { |
2176 | if (f && f->glyphs_initialized_p) | |
2177 | { | |
42f55fe0 GM |
2178 | /* Block interrupt input so that we don't get surprised by an X |
2179 | event while we're in an inconsistent state. */ | |
4d7e6e51 | 2180 | block_input (); |
5f5c8ee5 | 2181 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2182 | |
5f5c8ee5 | 2183 | /* Release window sub-matrices. */ |
e69b0960 DA |
2184 | if (!NILP (f->root_window)) |
2185 | free_window_matrices (XWINDOW (f->root_window)); | |
5f5c8ee5 GM |
2186 | |
2187 | /* Free the dummy window for menu bars without X toolkit and its | |
2188 | glyph matrices. */ | |
e69b0960 | 2189 | if (!NILP (f->menu_bar_window)) |
5f5c8ee5 | 2190 | { |
e69b0960 | 2191 | struct window *w = XWINDOW (f->menu_bar_window); |
5f5c8ee5 GM |
2192 | free_glyph_matrix (w->desired_matrix); |
2193 | free_glyph_matrix (w->current_matrix); | |
2194 | w->desired_matrix = w->current_matrix = NULL; | |
f00af5b1 | 2195 | fset_menu_bar_window (f, Qnil); |
5f5c8ee5 GM |
2196 | } |
2197 | ||
9ea173e8 | 2198 | /* Free the tool bar window and its glyph matrices. */ |
e69b0960 | 2199 | if (!NILP (f->tool_bar_window)) |
5f5c8ee5 | 2200 | { |
e69b0960 | 2201 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2202 | free_glyph_matrix (w->desired_matrix); |
2203 | free_glyph_matrix (w->current_matrix); | |
2204 | w->desired_matrix = w->current_matrix = NULL; | |
f00af5b1 | 2205 | fset_tool_bar_window (f, Qnil); |
5f5c8ee5 GM |
2206 | } |
2207 | ||
2208 | /* Release frame glyph matrices. Reset fields to zero in | |
2209 | case we are called a second time. */ | |
2210 | if (f->desired_matrix) | |
2211 | { | |
2212 | free_glyph_matrix (f->desired_matrix); | |
2213 | free_glyph_matrix (f->current_matrix); | |
2214 | f->desired_matrix = f->current_matrix = NULL; | |
2215 | } | |
2216 | ||
2217 | /* Release glyph pools. */ | |
2218 | if (f->desired_pool) | |
2219 | { | |
2220 | free_glyph_pool (f->desired_pool); | |
2221 | free_glyph_pool (f->current_pool); | |
2222 | f->desired_pool = f->current_pool = NULL; | |
2223 | } | |
177c0ea7 | 2224 | |
4d7e6e51 | 2225 | unblock_input (); |
5f5c8ee5 GM |
2226 | } |
2227 | } | |
2228 | ||
2229 | ||
2230 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2231 | function may be called with a null pointer, and it may be called on | |
2232 | the same tree more than once. */ | |
2233 | ||
2234 | void | |
971de7fb | 2235 | free_window_matrices (struct window *w) |
5f5c8ee5 GM |
2236 | { |
2237 | while (w) | |
2238 | { | |
d3d50620 DA |
2239 | if (!NILP (w->hchild)) |
2240 | free_window_matrices (XWINDOW (w->hchild)); | |
2241 | else if (!NILP (w->vchild)) | |
2242 | free_window_matrices (XWINDOW (w->vchild)); | |
177c0ea7 | 2243 | else |
5f5c8ee5 GM |
2244 | { |
2245 | /* This is a leaf window. Free its memory and reset fields | |
2246 | to zero in case this function is called a second time for | |
2247 | W. */ | |
2248 | free_glyph_matrix (w->current_matrix); | |
2249 | free_glyph_matrix (w->desired_matrix); | |
2250 | w->current_matrix = w->desired_matrix = NULL; | |
2251 | } | |
2252 | ||
2253 | /* Next window on same level. */ | |
d3d50620 | 2254 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2255 | } |
2256 | } | |
2257 | ||
2258 | ||
2259 | /* Check glyph memory leaks. This function is called from | |
2260 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2261 | exits. We therefore free all glyph memory for all active frames | |
2262 | explicitly and check that nothing is left allocated. */ | |
2263 | ||
2264 | void | |
971de7fb | 2265 | check_glyph_memory (void) |
5f5c8ee5 GM |
2266 | { |
2267 | Lisp_Object tail, frame; | |
2268 | ||
2269 | /* Free glyph memory for all frames. */ | |
2270 | FOR_EACH_FRAME (tail, frame) | |
2271 | free_glyphs (XFRAME (frame)); | |
2272 | ||
2273 | /* Check that nothing is left allocated. */ | |
2274 | if (glyph_matrix_count) | |
1088b922 | 2275 | emacs_abort (); |
5f5c8ee5 | 2276 | if (glyph_pool_count) |
1088b922 | 2277 | emacs_abort (); |
5f5c8ee5 GM |
2278 | } |
2279 | ||
2280 | ||
2281 | \f | |
2282 | /********************************************************************** | |
2283 | Building a Frame Matrix | |
2284 | **********************************************************************/ | |
2285 | ||
2286 | /* Most of the redisplay code works on glyph matrices attached to | |
2287 | windows. This is a good solution most of the time, but it is not | |
2288 | suitable for terminal code. Terminal output functions cannot rely | |
2289 | on being able to set an arbitrary terminal window. Instead they | |
2290 | must be provided with a view of the whole frame, i.e. the whole | |
2291 | screen. We build such a view by constructing a frame matrix from | |
2292 | window matrices in this section. | |
2293 | ||
2294 | Windows that must be updated have their must_be_update_p flag set. | |
2295 | For all such windows, their desired matrix is made part of the | |
2296 | desired frame matrix. For other windows, their current matrix is | |
2297 | made part of the desired frame matrix. | |
2298 | ||
2299 | +-----------------+----------------+ | |
2300 | | desired | desired | | |
2301 | | | | | |
2302 | +-----------------+----------------+ | |
2303 | | current | | |
2304 | | | | |
2305 | +----------------------------------+ | |
2306 | ||
2307 | Desired window matrices can be made part of the frame matrix in a | |
2308 | cheap way: We exploit the fact that the desired frame matrix and | |
2309 | desired window matrices share their glyph memory. This is not | |
2310 | possible for current window matrices. Their glyphs are copied to | |
2311 | the desired frame matrix. The latter is equivalent to | |
2312 | preserve_other_columns in the old redisplay. | |
2313 | ||
2314 | Used glyphs counters for frame matrix rows are the result of adding | |
2315 | up glyph lengths of the window matrices. A line in the frame | |
2316 | matrix is enabled, if a corresponding line in a window matrix is | |
2317 | enabled. | |
177c0ea7 | 2318 | |
5f5c8ee5 GM |
2319 | After building the desired frame matrix, it will be passed to |
2320 | terminal code, which will manipulate both the desired and current | |
2321 | frame matrix. Changes applied to the frame's current matrix have | |
2322 | to be visible in current window matrices afterwards, of course. | |
2323 | ||
2324 | This problem is solved like this: | |
2325 | ||
2326 | 1. Window and frame matrices share glyphs. Window matrices are | |
2327 | constructed in a way that their glyph contents ARE the glyph | |
2328 | contents needed in a frame matrix. Thus, any modification of | |
2329 | glyphs done in terminal code will be reflected in window matrices | |
2330 | automatically. | |
177c0ea7 | 2331 | |
5f5c8ee5 GM |
2332 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2333 | intercepted by hook functions so that corresponding row operations | |
2334 | on window matrices can be performed. This is necessary because we | |
2335 | use pointers to glyphs in glyph row structures. To satisfy the | |
2336 | assumption of point 1 above that glyphs are updated implicitly in | |
2337 | window matrices when they are manipulated via the frame matrix, | |
2338 | window and frame matrix must of course agree where to find the | |
2339 | glyphs for their rows. Possible manipulations that must be | |
2340 | mirrored are assignments of rows of the desired frame matrix to the | |
2341 | current frame matrix and scrolling the current frame matrix. */ | |
2342 | ||
2343 | /* Build frame F's desired matrix from window matrices. Only windows | |
2344 | which have the flag must_be_updated_p set have to be updated. Menu | |
2345 | bar lines of a frame are not covered by window matrices, so make | |
2346 | sure not to touch them in this function. */ | |
2347 | ||
2348 | static void | |
971de7fb | 2349 | build_frame_matrix (struct frame *f) |
5f5c8ee5 GM |
2350 | { |
2351 | int i; | |
2352 | ||
2353 | /* F must have a frame matrix when this function is called. */ | |
a54e2c05 | 2354 | eassert (!FRAME_WINDOW_P (f)); |
177c0ea7 | 2355 | |
5f5c8ee5 GM |
2356 | /* Clear all rows in the frame matrix covered by window matrices. |
2357 | Menu bar lines are not covered by windows. */ | |
2358 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2359 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2360 | ||
2361 | /* Build the matrix by walking the window tree. */ | |
2362 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2363 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2364 | } | |
2365 | ||
2366 | ||
2367 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2368 | matrices. W is the root of a window tree. */ | |
2369 | ||
2370 | static void | |
971de7fb | 2371 | build_frame_matrix_from_window_tree (struct glyph_matrix *matrix, struct window *w) |
5f5c8ee5 GM |
2372 | { |
2373 | while (w) | |
2374 | { | |
d3d50620 DA |
2375 | if (!NILP (w->hchild)) |
2376 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->hchild)); | |
2377 | else if (!NILP (w->vchild)) | |
2378 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->vchild)); | |
5f5c8ee5 GM |
2379 | else |
2380 | build_frame_matrix_from_leaf_window (matrix, w); | |
2381 | ||
d3d50620 | 2382 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2383 | } |
2384 | } | |
2385 | ||
2386 | ||
2387 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2388 | desired frame matrix built. W is a leaf window whose desired or | |
2389 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2390 | must_be_updated_p determines which matrix it contributes to | |
59ea14cd | 2391 | FRAME_MATRIX. If W->must_be_updated_p, W's desired matrix |
5f5c8ee5 GM |
2392 | is added to FRAME_MATRIX, otherwise W's current matrix is added. |
2393 | Adding a desired matrix means setting up used counters and such in | |
2394 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2395 | means copying glyphs. The latter case corresponds to | |
2396 | preserve_other_columns in the old redisplay. */ | |
2397 | ||
2398 | static void | |
971de7fb | 2399 | build_frame_matrix_from_leaf_window (struct glyph_matrix *frame_matrix, struct window *w) |
5f5c8ee5 GM |
2400 | { |
2401 | struct glyph_matrix *window_matrix; | |
2402 | int window_y, frame_y; | |
2403 | /* If non-zero, a glyph to insert at the right border of W. */ | |
3fc809e2 KS |
2404 | GLYPH right_border_glyph; |
2405 | ||
2406 | SET_GLYPH_FROM_CHAR (right_border_glyph, 0); | |
5f5c8ee5 GM |
2407 | |
2408 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2409 | if (w->must_be_updated_p) | |
2410 | { | |
2411 | window_matrix = w->desired_matrix; | |
2412 | ||
2413 | /* Decide whether we want to add a vertical border glyph. */ | |
2414 | if (!WINDOW_RIGHTMOST_P (w)) | |
2415 | { | |
2416 | struct Lisp_Char_Table *dp = window_display_table (w); | |
3fc809e2 | 2417 | Lisp_Object gc; |
b4e49aee | 2418 | |
3fc809e2 KS |
2419 | SET_GLYPH_FROM_CHAR (right_border_glyph, '|'); |
2420 | if (dp | |
d311d28c | 2421 | && (gc = DISP_BORDER_GLYPH (dp), GLYPH_CODE_P (gc))) |
3fc809e2 KS |
2422 | { |
2423 | SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph, gc); | |
2424 | spec_glyph_lookup_face (w, &right_border_glyph); | |
2425 | } | |
b4e49aee | 2426 | |
3fc809e2 KS |
2427 | if (GLYPH_FACE (right_border_glyph) <= 0) |
2428 | SET_GLYPH_FACE (right_border_glyph, VERTICAL_BORDER_FACE_ID); | |
5f5c8ee5 GM |
2429 | } |
2430 | } | |
2431 | else | |
2432 | window_matrix = w->current_matrix; | |
2433 | ||
2434 | /* For all rows in the window matrix and corresponding rows in the | |
2435 | frame matrix. */ | |
2436 | window_y = 0; | |
2437 | frame_y = window_matrix->matrix_y; | |
2438 | while (window_y < window_matrix->nrows) | |
2439 | { | |
2440 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2441 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
59ea14cd | 2442 | bool current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2443 | |
2444 | /* Fill up the frame row with spaces up to the left margin of the | |
2445 | window row. */ | |
2446 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2447 | ||
2448 | /* Fill up areas in the window matrix row with spaces. */ | |
2449 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2450 | |
2451 | /* If only part of W's desired matrix has been built, and | |
2452 | window_row wasn't displayed, use the corresponding current | |
2453 | row instead. */ | |
2454 | if (window_matrix == w->desired_matrix | |
2455 | && !window_row->enabled_p) | |
2456 | { | |
2457 | window_row = w->current_matrix->rows + window_y; | |
2458 | current_row_p = 1; | |
2459 | } | |
177c0ea7 | 2460 | |
2a8bd25f | 2461 | if (current_row_p) |
5f5c8ee5 | 2462 | { |
2a8bd25f | 2463 | /* Copy window row to frame row. */ |
72af86bd AS |
2464 | memcpy (frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, |
2465 | window_row->glyphs[0], | |
2466 | window_matrix->matrix_w * sizeof (struct glyph)); | |
5f5c8ee5 GM |
2467 | } |
2468 | else | |
2469 | { | |
a54e2c05 | 2470 | eassert (window_row->enabled_p); |
177c0ea7 | 2471 | |
2a8bd25f GM |
2472 | /* Only when a desired row has been displayed, we want |
2473 | the corresponding frame row to be updated. */ | |
2474 | frame_row->enabled_p = 1; | |
177c0ea7 | 2475 | |
5f5c8ee5 GM |
2476 | /* Maybe insert a vertical border between horizontally adjacent |
2477 | windows. */ | |
3fc809e2 | 2478 | if (GLYPH_CHAR (right_border_glyph) != 0) |
5f5c8ee5 GM |
2479 | { |
2480 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2481 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2482 | } | |
2483 | ||
e509cfa6 | 2484 | #ifdef GLYPH_DEBUG |
a13396c9 GM |
2485 | /* Window row window_y must be a slice of frame row |
2486 | frame_y. */ | |
a54e2c05 | 2487 | eassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2488 | |
5f5c8ee5 GM |
2489 | /* If rows are in sync, we don't have to copy glyphs because |
2490 | frame and window share glyphs. */ | |
177c0ea7 | 2491 | |
a38634ff | 2492 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2493 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2494 | #endif |
5f5c8ee5 GM |
2495 | } |
2496 | ||
2497 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2498 | up with spaces, and visit leaf windows from left to right it | |
2499 | can be done simply. */ | |
177c0ea7 | 2500 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2501 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2502 | ||
5f5c8ee5 GM |
2503 | /* Next row. */ |
2504 | ++window_y; | |
2505 | ++frame_y; | |
2506 | } | |
2507 | } | |
2508 | ||
5f81871e RS |
2509 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2510 | ID, return a glyph that has a realized face ID. | |
2511 | This is used for glyphs displayed specially and not part of the text; | |
2512 | for instance, vertical separators, truncation markers, etc. */ | |
2513 | ||
3fc809e2 | 2514 | void |
971de7fb | 2515 | spec_glyph_lookup_face (struct window *w, GLYPH *glyph) |
5f81871e | 2516 | { |
3fc809e2 | 2517 | int lface_id = GLYPH_FACE (*glyph); |
5f81871e RS |
2518 | /* Convert the glyph's specified face to a realized (cache) face. */ |
2519 | if (lface_id > 0) | |
2520 | { | |
d3d50620 | 2521 | int face_id = merge_faces (XFRAME (w->frame), |
5f81871e | 2522 | Qt, lface_id, DEFAULT_FACE_ID); |
3fc809e2 | 2523 | SET_GLYPH_FACE (*glyph, face_id); |
5f81871e | 2524 | } |
5f81871e | 2525 | } |
5f5c8ee5 GM |
2526 | |
2527 | /* Add spaces to a glyph row ROW in a window matrix. | |
2528 | ||
2529 | Each row has the form: | |
2530 | ||
2531 | +---------+-----------------------------+------------+ | |
2532 | | left | text | right | | |
2533 | +---------+-----------------------------+------------+ | |
2534 | ||
2535 | Left and right marginal areas are optional. This function adds | |
2536 | spaces to areas so that there are no empty holes between areas. | |
2537 | In other words: If the right area is not empty, the text area | |
2538 | is filled up with spaces up to the right area. If the text area | |
2539 | is not empty, the left area is filled up. | |
2540 | ||
2541 | To be called for frame-based redisplay, only. */ | |
2542 | ||
2543 | static void | |
971de7fb | 2544 | fill_up_glyph_row_with_spaces (struct glyph_row *row) |
5f5c8ee5 GM |
2545 | { |
2546 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2547 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2548 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2549 | } | |
2550 | ||
2551 | ||
2552 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2553 | frame-based redisplay only. */ | |
2554 | ||
2555 | static void | |
971de7fb | 2556 | fill_up_glyph_row_area_with_spaces (struct glyph_row *row, int area) |
5f5c8ee5 GM |
2557 | { |
2558 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2559 | { | |
2560 | struct glyph *end = row->glyphs[area + 1]; | |
2561 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2562 | ||
2563 | while (text < end) | |
2564 | *text++ = space_glyph; | |
2565 | row->used[area] = text - row->glyphs[area]; | |
2566 | } | |
2567 | } | |
2568 | ||
2569 | ||
2570 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2571 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2572 | ||
2573 | static void | |
971de7fb | 2574 | fill_up_frame_row_with_spaces (struct glyph_row *row, int upto) |
5f5c8ee5 GM |
2575 | { |
2576 | int i = row->used[TEXT_AREA]; | |
2577 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2578 | |
5f5c8ee5 GM |
2579 | while (i < upto) |
2580 | glyph[i++] = space_glyph; | |
2581 | ||
2582 | row->used[TEXT_AREA] = i; | |
2583 | } | |
2584 | ||
2585 | ||
2586 | \f | |
2587 | /********************************************************************** | |
2588 | Mirroring operations on frame matrices in window matrices | |
2589 | **********************************************************************/ | |
2590 | ||
2591 | /* Set frame being updated via frame-based redisplay to F. This | |
2592 | function must be called before updates to make explicit that we are | |
2593 | working on frame matrices or not. */ | |
2594 | ||
b0ab8123 | 2595 | static void |
971de7fb | 2596 | set_frame_matrix_frame (struct frame *f) |
5f5c8ee5 GM |
2597 | { |
2598 | frame_matrix_frame = f; | |
2599 | } | |
2600 | ||
2601 | ||
2602 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2603 | DESIRED_MATRIX is the desired matrix corresponding to | |
2604 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2605 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2606 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2607 | done in frame matrices, and that we have to perform analogous | |
2608 | operations in window matrices of frame_matrix_frame. */ | |
2609 | ||
b0ab8123 | 2610 | static void |
971de7fb | 2611 | make_current (struct glyph_matrix *desired_matrix, struct glyph_matrix *current_matrix, int row) |
5f5c8ee5 GM |
2612 | { |
2613 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2614 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
59ea14cd | 2615 | bool mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2616 | |
2617 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2618 | between both rows, and does a structure assignment otherwise. */ | |
2619 | assign_row (current_row, desired_row); | |
2620 | ||
2621 | /* Enable current_row to mark it as valid. */ | |
2622 | current_row->enabled_p = 1; | |
e876ff42 | 2623 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2624 | |
2625 | /* If we are called on frame matrices, perform analogous operations | |
2626 | for window matrices. */ | |
2627 | if (frame_matrix_frame) | |
e69b0960 | 2628 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); |
5f5c8ee5 GM |
2629 | } |
2630 | ||
2631 | ||
2632 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2633 | W's frame which has been made current (by swapping pointers between | |
2634 | current and desired matrix). Perform analogous operations in the | |
2635 | matrices of leaf windows in the window tree rooted at W. */ | |
2636 | ||
2637 | static void | |
971de7fb | 2638 | mirror_make_current (struct window *w, int frame_row) |
5f5c8ee5 GM |
2639 | { |
2640 | while (w) | |
2641 | { | |
d3d50620 DA |
2642 | if (!NILP (w->hchild)) |
2643 | mirror_make_current (XWINDOW (w->hchild), frame_row); | |
2644 | else if (!NILP (w->vchild)) | |
2645 | mirror_make_current (XWINDOW (w->vchild), frame_row); | |
5f5c8ee5 GM |
2646 | else |
2647 | { | |
2648 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2649 | here because the checks performed in debug mode there | |
2650 | will not allow the conversion. */ | |
2651 | int row = frame_row - w->desired_matrix->matrix_y; | |
2652 | ||
2653 | /* If FRAME_ROW is within W, assign the desired row to the | |
2654 | current row (exchanging glyph pointers). */ | |
2655 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
2656 | { | |
2657 | struct glyph_row *current_row | |
2658 | = MATRIX_ROW (w->current_matrix, row); | |
2659 | struct glyph_row *desired_row | |
2660 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
2661 | |
2662 | if (desired_row->enabled_p) | |
2663 | assign_row (current_row, desired_row); | |
2664 | else | |
2665 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 | 2666 | current_row->enabled_p = 1; |
d009ae66 EZ |
2667 | |
2668 | /* Set the Y coordinate of the mode/header line's row. | |
2669 | It is needed in draw_row_with_mouse_face to find the | |
2670 | screen coordinates. (Window-based redisplay sets | |
2671 | this in update_window, but no one seems to do that | |
2672 | for frame-based redisplay.) */ | |
2673 | if (current_row->mode_line_p) | |
2674 | current_row->y = row; | |
5f5c8ee5 GM |
2675 | } |
2676 | } | |
177c0ea7 | 2677 | |
d3d50620 | 2678 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2679 | } |
2680 | } | |
2681 | ||
2682 | ||
2683 | /* Perform row dance after scrolling. We are working on the range of | |
2684 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
2685 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
2686 | row I in the range 0 <= I < NLINES, the index of the original line | |
2687 | to move to I. This index is relative to the row range, i.e. 0 <= | |
2688 | index < NLINES. RETAINED_P is a vector containing zero for each | |
2689 | row 0 <= I < NLINES which is empty. | |
2690 | ||
2691 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 2692 | |
5f5c8ee5 | 2693 | void |
6f704c76 DN |
2694 | mirrored_line_dance (struct glyph_matrix *matrix, int unchanged_at_top, int nlines, |
2695 | int *copy_from, char *retained_p) | |
5f5c8ee5 GM |
2696 | { |
2697 | /* A copy of original rows. */ | |
2698 | struct glyph_row *old_rows; | |
2699 | ||
2700 | /* Rows to assign to. */ | |
2701 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 2702 | |
5f5c8ee5 GM |
2703 | int i; |
2704 | ||
2705 | /* Make a copy of the original rows. */ | |
38182d90 | 2706 | old_rows = alloca (nlines * sizeof *old_rows); |
72af86bd | 2707 | memcpy (old_rows, new_rows, nlines * sizeof *old_rows); |
5f5c8ee5 GM |
2708 | |
2709 | /* Assign new rows, maybe clear lines. */ | |
2710 | for (i = 0; i < nlines; ++i) | |
2711 | { | |
59ea14cd | 2712 | bool enabled_before_p = new_rows[i].enabled_p; |
5f5c8ee5 | 2713 | |
a54e2c05 DA |
2714 | eassert (i + unchanged_at_top < matrix->nrows); |
2715 | eassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
5f5c8ee5 GM |
2716 | new_rows[i] = old_rows[copy_from[i]]; |
2717 | new_rows[i].enabled_p = enabled_before_p; | |
2718 | ||
2719 | /* RETAINED_P is zero for empty lines. */ | |
2720 | if (!retained_p[copy_from[i]]) | |
2721 | new_rows[i].enabled_p = 0; | |
2722 | } | |
2723 | ||
153a073c | 2724 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 | 2725 | if (frame_matrix_frame) |
e69b0960 | 2726 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), |
5f5c8ee5 GM |
2727 | unchanged_at_top, nlines, copy_from, retained_p); |
2728 | } | |
2729 | ||
2730 | ||
a13396c9 | 2731 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 2732 | the current frame matrix. */ |
a13396c9 GM |
2733 | |
2734 | static void | |
971de7fb | 2735 | sync_window_with_frame_matrix_rows (struct window *w) |
a13396c9 | 2736 | { |
d3d50620 | 2737 | struct frame *f = XFRAME (w->frame); |
a13396c9 | 2738 | struct glyph_row *window_row, *window_row_end, *frame_row; |
075c507b | 2739 | int left, right, x, width; |
a13396c9 | 2740 | |
5cb88111 | 2741 | /* Preconditions: W must be a leaf window on a tty frame. */ |
d3d50620 | 2742 | eassert (NILP (w->hchild) && NILP (w->vchild)); |
a54e2c05 | 2743 | eassert (!FRAME_WINDOW_P (f)); |
a13396c9 | 2744 | |
d3d50620 DA |
2745 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
2746 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
2747 | x = w->current_matrix->matrix_x; |
2748 | width = w->current_matrix->matrix_w; | |
2749 | ||
a13396c9 GM |
2750 | window_row = w->current_matrix->rows; |
2751 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 2752 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 2753 | |
5cb88111 | 2754 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 2755 | { |
5cb88111 GM |
2756 | window_row->glyphs[LEFT_MARGIN_AREA] |
2757 | = frame_row->glyphs[0] + x; | |
2758 | window_row->glyphs[TEXT_AREA] | |
2759 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
2760 | window_row->glyphs[LAST_AREA] | |
2761 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
2762 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
2763 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
2764 | } |
2765 | } | |
2766 | ||
2767 | ||
2768 | /* Return the window in the window tree rooted in W containing frame | |
2769 | row ROW. Value is null if none is found. */ | |
2770 | ||
09ad5a91 | 2771 | static struct window * |
971de7fb | 2772 | frame_row_to_window (struct window *w, int row) |
a13396c9 GM |
2773 | { |
2774 | struct window *found = NULL; | |
177c0ea7 | 2775 | |
a13396c9 GM |
2776 | while (w && !found) |
2777 | { | |
d3d50620 DA |
2778 | if (!NILP (w->hchild)) |
2779 | found = frame_row_to_window (XWINDOW (w->hchild), row); | |
2780 | else if (!NILP (w->vchild)) | |
2781 | found = frame_row_to_window (XWINDOW (w->vchild), row); | |
7df02016 KS |
2782 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
2783 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 2784 | found = w; |
177c0ea7 | 2785 | |
d3d50620 | 2786 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
a13396c9 GM |
2787 | } |
2788 | ||
2789 | return found; | |
2790 | } | |
2791 | ||
2792 | ||
5f5c8ee5 GM |
2793 | /* Perform a line dance in the window tree rooted at W, after |
2794 | scrolling a frame matrix in mirrored_line_dance. | |
2795 | ||
2796 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
2797 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
2798 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
2799 | I < NLINES, the index of the original line to move to I. This | |
2800 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
2801 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
2802 | which is empty. */ | |
2803 | ||
2804 | static void | |
971de7fb | 2805 | mirror_line_dance (struct window *w, int unchanged_at_top, int nlines, int *copy_from, char *retained_p) |
5f5c8ee5 GM |
2806 | { |
2807 | while (w) | |
2808 | { | |
d3d50620 DA |
2809 | if (!NILP (w->hchild)) |
2810 | mirror_line_dance (XWINDOW (w->hchild), unchanged_at_top, | |
5f5c8ee5 | 2811 | nlines, copy_from, retained_p); |
d3d50620 DA |
2812 | else if (!NILP (w->vchild)) |
2813 | mirror_line_dance (XWINDOW (w->vchild), unchanged_at_top, | |
5f5c8ee5 GM |
2814 | nlines, copy_from, retained_p); |
2815 | else | |
2816 | { | |
2817 | /* W is a leaf window, and we are working on its current | |
2818 | matrix m. */ | |
2819 | struct glyph_matrix *m = w->current_matrix; | |
59ea14cd PE |
2820 | int i; |
2821 | bool sync_p = 0; | |
5f5c8ee5 GM |
2822 | struct glyph_row *old_rows; |
2823 | ||
2824 | /* Make a copy of the original rows of matrix m. */ | |
38182d90 | 2825 | old_rows = alloca (m->nrows * sizeof *old_rows); |
72af86bd | 2826 | memcpy (old_rows, m->rows, m->nrows * sizeof *old_rows); |
5f5c8ee5 GM |
2827 | |
2828 | for (i = 0; i < nlines; ++i) | |
2829 | { | |
2830 | /* Frame relative line assigned to. */ | |
2831 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 2832 | |
5f5c8ee5 GM |
2833 | /* Frame relative line assigned. */ |
2834 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 2835 | |
5f5c8ee5 GM |
2836 | /* Window relative line assigned to. */ |
2837 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 2838 | |
5f5c8ee5 GM |
2839 | /* Window relative line assigned. */ |
2840 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 2841 | |
5f5c8ee5 | 2842 | /* Is assigned line inside window? */ |
59ea14cd | 2843 | bool from_inside_window_p |
5f5c8ee5 | 2844 | = window_from >= 0 && window_from < m->matrix_h; |
177c0ea7 | 2845 | |
a13396c9 | 2846 | /* Is assigned to line inside window? */ |
59ea14cd | 2847 | bool to_inside_window_p |
a13396c9 | 2848 | = window_to >= 0 && window_to < m->matrix_h; |
177c0ea7 | 2849 | |
a13396c9 | 2850 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 2851 | { |
5f5c8ee5 GM |
2852 | /* Do the assignment. The enabled_p flag is saved |
2853 | over the assignment because the old redisplay did | |
2854 | that. */ | |
59ea14cd | 2855 | bool enabled_before_p = m->rows[window_to].enabled_p; |
5f5c8ee5 GM |
2856 | m->rows[window_to] = old_rows[window_from]; |
2857 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 2858 | |
5f5c8ee5 GM |
2859 | /* If frame line is empty, window line is empty, too. */ |
2860 | if (!retained_p[copy_from[i]]) | |
2861 | m->rows[window_to].enabled_p = 0; | |
2862 | } | |
a13396c9 GM |
2863 | else if (to_inside_window_p) |
2864 | { | |
2865 | /* A copy between windows. This is an infrequent | |
2866 | case not worth optimizing. */ | |
d3d50620 | 2867 | struct frame *f = XFRAME (w->frame); |
a13396c9 GM |
2868 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
2869 | struct window *w2; | |
2870 | struct glyph_matrix *m2; | |
2871 | int m2_from; | |
2872 | ||
fe8b8401 | 2873 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
2874 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
2875 | -nw', FROM_FRAME sometimes has no associated window. | |
2876 | This check avoids a segfault if W2 is null. */ | |
2877 | if (w2) | |
2878 | { | |
2879 | m2 = w2->current_matrix; | |
2880 | m2_from = frame_from - m2->matrix_y; | |
2881 | copy_row_except_pointers (m->rows + window_to, | |
2882 | m2->rows + m2_from); | |
2883 | ||
2884 | /* If frame line is empty, window line is empty, too. */ | |
2885 | if (!retained_p[copy_from[i]]) | |
2886 | m->rows[window_to].enabled_p = 0; | |
2887 | } | |
a13396c9 GM |
2888 | sync_p = 1; |
2889 | } | |
2890 | else if (from_inside_window_p) | |
2891 | sync_p = 1; | |
5f5c8ee5 | 2892 | } |
a13396c9 GM |
2893 | |
2894 | /* If there was a copy between windows, make sure glyph | |
2895 | pointers are in sync with the frame matrix. */ | |
2896 | if (sync_p) | |
2897 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 2898 | |
5f5c8ee5 GM |
2899 | /* Check that no pointers are lost. */ |
2900 | CHECK_MATRIX (m); | |
2901 | } | |
2902 | ||
2903 | /* Next window on same level. */ | |
d3d50620 | 2904 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2905 | } |
2906 | } | |
2907 | ||
2908 | ||
e509cfa6 | 2909 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
2910 | |
2911 | /* Check that window and frame matrices agree about their | |
2912 | understanding where glyphs of the rows are to find. For each | |
2913 | window in the window tree rooted at W, check that rows in the | |
2914 | matrices of leaf window agree with their frame matrices about | |
2915 | glyph pointers. */ | |
2916 | ||
85fece3e | 2917 | static void |
59fc5cf9 | 2918 | check_window_matrix_pointers (struct window *w) |
5f5c8ee5 GM |
2919 | { |
2920 | while (w) | |
2921 | { | |
d3d50620 DA |
2922 | if (!NILP (w->hchild)) |
2923 | check_window_matrix_pointers (XWINDOW (w->hchild)); | |
2924 | else if (!NILP (w->vchild)) | |
2925 | check_window_matrix_pointers (XWINDOW (w->vchild)); | |
5f5c8ee5 | 2926 | else |
60a8948a | 2927 | { |
d3d50620 | 2928 | struct frame *f = XFRAME (w->frame); |
5f5c8ee5 GM |
2929 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); |
2930 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 2931 | } |
177c0ea7 | 2932 | |
d3d50620 | 2933 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2934 | } |
2935 | } | |
2936 | ||
2937 | ||
2938 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
2939 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
2940 | each row in WINDOW_MATRIX check that it's a slice of the | |
2941 | corresponding frame row. If it isn't, abort. */ | |
2942 | ||
2943 | static void | |
59fc5cf9 AS |
2944 | check_matrix_pointers (struct glyph_matrix *window_matrix, |
2945 | struct glyph_matrix *frame_matrix) | |
5f5c8ee5 GM |
2946 | { |
2947 | /* Row number in WINDOW_MATRIX. */ | |
2948 | int i = 0; | |
2949 | ||
2950 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
2951 | int j = window_matrix->matrix_y; | |
2952 | ||
177c0ea7 | 2953 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
2954 | slice of the row in the frame matrix. If it isn't we didn't |
2955 | mirror an operation on the frame matrix correctly. */ | |
2956 | while (i < window_matrix->nrows) | |
2957 | { | |
2958 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
2959 | frame_matrix->rows + j)) | |
1088b922 | 2960 | emacs_abort (); |
5f5c8ee5 GM |
2961 | ++i, ++j; |
2962 | } | |
2963 | } | |
2964 | ||
e509cfa6 | 2965 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
2966 | |
2967 | ||
2968 | \f | |
2969 | /********************************************************************** | |
2970 | VPOS and HPOS translations | |
2971 | **********************************************************************/ | |
2972 | ||
e509cfa6 | 2973 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
2974 | |
2975 | /* Translate vertical position VPOS which is relative to window W to a | |
2976 | vertical position relative to W's frame. */ | |
2977 | ||
2978 | static int | |
59fc5cf9 | 2979 | window_to_frame_vpos (struct window *w, int vpos) |
5f5c8ee5 | 2980 | { |
d3d50620 | 2981 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
a54e2c05 | 2982 | eassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); |
7df02016 | 2983 | vpos += WINDOW_TOP_EDGE_LINE (w); |
d3d50620 | 2984 | eassert (vpos >= 0 && vpos <= FRAME_LINES (XFRAME (w->frame))); |
5f5c8ee5 GM |
2985 | return vpos; |
2986 | } | |
2987 | ||
2988 | ||
2989 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 2990 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
2991 | |
2992 | static int | |
59fc5cf9 | 2993 | window_to_frame_hpos (struct window *w, int hpos) |
5f5c8ee5 | 2994 | { |
d3d50620 | 2995 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 2996 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
2997 | return hpos; |
2998 | } | |
177c0ea7 | 2999 | |
5f5c8ee5 GM |
3000 | #endif /* GLYPH_DEBUG */ |
3001 | ||
3002 | ||
3003 | \f | |
3004 | /********************************************************************** | |
3005 | Redrawing Frames | |
3006 | **********************************************************************/ | |
3007 | ||
2a14f83b | 3008 | /* Redraw frame F. */ |
5f5c8ee5 | 3009 | |
2a14f83b DA |
3010 | void |
3011 | redraw_frame (struct frame *f) | |
3012 | { | |
3013 | /* Error if F has no glyphs. */ | |
3014 | eassert (f->glyphs_initialized_p); | |
5f5c8ee5 | 3015 | update_begin (f); |
3224dac1 | 3016 | #ifdef MSDOS |
f2adda5e | 3017 | if (FRAME_MSDOS_P (f)) |
79d39b69 | 3018 | FRAME_TERMINAL (f)->set_terminal_modes_hook (FRAME_TERMINAL (f)); |
3224dac1 | 3019 | #endif |
385ed61f | 3020 | clear_frame (f); |
5f5c8ee5 GM |
3021 | clear_current_matrices (f); |
3022 | update_end (f); | |
daf01701 | 3023 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3024 | fflush (FRAME_TTY (f)->output); |
5f5c8ee5 GM |
3025 | windows_or_buffers_changed++; |
3026 | /* Mark all windows as inaccurate, so that every window will have | |
3027 | its redisplay done. */ | |
3028 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
3029 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
3030 | f->garbaged = 0; | |
5f5c8ee5 GM |
3031 | } |
3032 | ||
2a14f83b DA |
3033 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 0, 1, 0, |
3034 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. | |
3035 | If FRAME is omitted or nil, the selected frame is used. */) | |
3036 | (Lisp_Object frame) | |
5f5c8ee5 | 3037 | { |
2a14f83b DA |
3038 | redraw_frame (decode_live_frame (frame)); |
3039 | return Qnil; | |
5f5c8ee5 GM |
3040 | } |
3041 | ||
5f5c8ee5 | 3042 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", |
7ee72033 | 3043 | doc: /* Clear and redisplay all visible frames. */) |
5842a27b | 3044 | (void) |
5f5c8ee5 GM |
3045 | { |
3046 | Lisp_Object tail, frame; | |
3047 | ||
3048 | FOR_EACH_FRAME (tail, frame) | |
3049 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
2a14f83b | 3050 | redraw_frame (XFRAME (frame)); |
5f5c8ee5 GM |
3051 | |
3052 | return Qnil; | |
3053 | } | |
3054 | ||
3055 | ||
5f5c8ee5 | 3056 | \f |
5f5c8ee5 GM |
3057 | /*********************************************************************** |
3058 | Frame Update | |
3059 | ***********************************************************************/ | |
4588ec20 | 3060 | |
5f5c8ee5 | 3061 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 3062 | |
59ea14cd PE |
3063 | If FORCE_P, don't let redisplay be stopped by detecting pending input. |
3064 | If INHIBIT_HAIRY_ID_P, don't try scrolling. | |
177c0ea7 | 3065 | |
59ea14cd | 3066 | Value is true if redisplay was stopped due to pending input. */ |
4588ec20 | 3067 | |
59ea14cd PE |
3068 | bool |
3069 | update_frame (struct frame *f, bool force_p, bool inhibit_hairy_id_p) | |
5f5c8ee5 | 3070 | { |
59ea14cd PE |
3071 | /* True means display has been paused because of pending input. */ |
3072 | bool paused_p; | |
e69b0960 | 3073 | struct window *root_window = XWINDOW (f->root_window); |
5f5c8ee5 | 3074 | |
a2130dbb KS |
3075 | if (redisplay_dont_pause) |
3076 | force_p = 1; | |
6fd326b7 | 3077 | else if (!force_p && detect_input_pending_ignore_squeezables ()) |
d012c62b | 3078 | { |
6fd326b7 DA |
3079 | paused_p = 1; |
3080 | goto do_pause; | |
d012c62b | 3081 | } |
d012c62b | 3082 | |
5f5c8ee5 | 3083 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3084 | { |
5f5c8ee5 GM |
3085 | /* We are working on window matrix basis. All windows whose |
3086 | flag must_be_updated_p is set have to be updated. */ | |
3087 | ||
3088 | /* Record that we are not working on frame matrices. */ | |
3089 | set_frame_matrix_frame (NULL); | |
3090 | ||
3091 | /* Update all windows in the window tree of F, maybe stopping | |
3092 | when pending input is detected. */ | |
3093 | update_begin (f); | |
3094 | ||
3095 | /* Update the menu bar on X frames that don't have toolkit | |
3096 | support. */ | |
e69b0960 DA |
3097 | if (WINDOWP (f->menu_bar_window)) |
3098 | update_window (XWINDOW (f->menu_bar_window), 1); | |
5f5c8ee5 GM |
3099 | |
3100 | /* Update the tool-bar window, if present. */ | |
e69b0960 | 3101 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3102 | { |
e69b0960 | 3103 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3104 | |
3105 | /* Update tool-bar window. */ | |
3106 | if (w->must_be_updated_p) | |
4588ec20 | 3107 | { |
153a073c PJ |
3108 | Lisp_Object tem; |
3109 | ||
5f5c8ee5 GM |
3110 | update_window (w, 1); |
3111 | w->must_be_updated_p = 0; | |
3112 | ||
3113 | /* Swap tool-bar strings. We swap because we want to | |
3114 | reuse strings. */ | |
e69b0960 | 3115 | tem = f->current_tool_bar_string; |
f00af5b1 PE |
3116 | fset_current_tool_bar_string (f, f->desired_tool_bar_string); |
3117 | fset_desired_tool_bar_string (f, tem); | |
4588ec20 JB |
3118 | } |
3119 | } | |
177c0ea7 | 3120 | |
5f5c8ee5 GM |
3121 | |
3122 | /* Update windows. */ | |
3123 | paused_p = update_window_tree (root_window, force_p); | |
3124 | update_end (f); | |
177c0ea7 | 3125 | |
6b61353c | 3126 | /* This flush is a performance bottleneck under X, |
e581a466 | 3127 | and it doesn't seem to be necessary anyway (in general). |
6b61353c | 3128 | It is necessary when resizing the window with the mouse, or |
e581a466 | 3129 | at least the fringes are not redrawn in a timely manner. ++kfs */ |
6b61353c | 3130 | if (f->force_flush_display_p) |
e581a466 KL |
3131 | { |
3132 | FRAME_RIF (f)->flush_display (f); | |
3133 | f->force_flush_display_p = 0; | |
3134 | } | |
4588ec20 | 3135 | } |
5f5c8ee5 GM |
3136 | else |
3137 | { | |
3138 | /* We are working on frame matrix basis. Set the frame on whose | |
3139 | frame matrix we operate. */ | |
3140 | set_frame_matrix_frame (f); | |
3141 | ||
868dd24b | 3142 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3143 | build_frame_matrix (f); |
177c0ea7 | 3144 | |
868dd24b GM |
3145 | /* Update the display */ |
3146 | update_begin (f); | |
5f5c8ee5 | 3147 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3148 | update_end (f); |
3149 | ||
7d2f1216 | 3150 | if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f)) |
3224dac1 | 3151 | { |
0b0d3e0b KL |
3152 | if (FRAME_TTY (f)->termscript) |
3153 | fflush (FRAME_TTY (f)->termscript); | |
7d2f1216 EZ |
3154 | if (FRAME_TERMCAP_P (f)) |
3155 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3156 | } |
868dd24b | 3157 | |
5f5c8ee5 | 3158 | /* Check window matrices for lost pointers. */ |
e509cfa6 | 3159 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
3160 | check_window_matrix_pointers (root_window); |
3161 | add_frame_display_history (f, paused_p); | |
3162 | #endif | |
5f5c8ee5 GM |
3163 | } |
3164 | ||
993d4ab6 | 3165 | do_pause: |
5f5c8ee5 GM |
3166 | /* Reset flags indicating that a window should be updated. */ |
3167 | set_window_update_flags (root_window, 0); | |
177c0ea7 | 3168 | |
868dd24b | 3169 | display_completed = !paused_p; |
5f5c8ee5 | 3170 | return paused_p; |
4588ec20 | 3171 | } |
5f5c8ee5 GM |
3172 | |
3173 | ||
4588ec20 | 3174 | \f |
5f5c8ee5 GM |
3175 | /************************************************************************ |
3176 | Window-based updates | |
3177 | ************************************************************************/ | |
3178 | ||
59ea14cd PE |
3179 | /* Perform updates in window tree rooted at W. |
3180 | If FORCE_P, don't stop updating if input is pending. */ | |
5f5c8ee5 | 3181 | |
59ea14cd PE |
3182 | static bool |
3183 | update_window_tree (struct window *w, bool force_p) | |
5f5c8ee5 | 3184 | { |
59ea14cd | 3185 | bool paused_p = 0; |
177c0ea7 | 3186 | |
5f5c8ee5 GM |
3187 | while (w && !paused_p) |
3188 | { | |
d3d50620 DA |
3189 | if (!NILP (w->hchild)) |
3190 | paused_p |= update_window_tree (XWINDOW (w->hchild), force_p); | |
3191 | else if (!NILP (w->vchild)) | |
3192 | paused_p |= update_window_tree (XWINDOW (w->vchild), force_p); | |
5f5c8ee5 GM |
3193 | else if (w->must_be_updated_p) |
3194 | paused_p |= update_window (w, force_p); | |
3195 | ||
d3d50620 | 3196 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
3197 | } |
3198 | ||
3199 | return paused_p; | |
3200 | } | |
3201 | ||
3202 | ||
59ea14cd PE |
3203 | /* Update window W if its flag must_be_updated_p is set. |
3204 | If FORCE_P, don't stop updating if input is pending. */ | |
5f5c8ee5 GM |
3205 | |
3206 | void | |
59ea14cd | 3207 | update_single_window (struct window *w, bool force_p) |
5f5c8ee5 GM |
3208 | { |
3209 | if (w->must_be_updated_p) | |
3210 | { | |
3211 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
3212 | ||
3213 | /* Record that this is not a frame-based redisplay. */ | |
3214 | set_frame_matrix_frame (NULL); | |
3215 | ||
a2130dbb KS |
3216 | if (redisplay_dont_pause) |
3217 | force_p = 1; | |
d012c62b | 3218 | |
5f5c8ee5 GM |
3219 | /* Update W. */ |
3220 | update_begin (f); | |
3221 | update_window (w, force_p); | |
3222 | update_end (f); | |
4588ec20 | 3223 | |
5f5c8ee5 GM |
3224 | /* Reset flag in W. */ |
3225 | w->must_be_updated_p = 0; | |
3226 | } | |
3227 | } | |
4588ec20 | 3228 | |
93e023fc | 3229 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 3230 | |
408f5064 GM |
3231 | /* Redraw lines from the current matrix of window W that are |
3232 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
3233 | ||
3234 | static void | |
971de7fb | 3235 | redraw_overlapped_rows (struct window *w, int yb) |
408f5064 | 3236 | { |
d8ee7803 | 3237 | int i; |
fa971ac3 | 3238 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3fc809e2 | 3239 | |
408f5064 GM |
3240 | /* If rows overlapping others have been changed, the rows being |
3241 | overlapped have to be redrawn. This won't draw lines that have | |
3242 | already been drawn in update_window_line because overlapped_p in | |
3243 | desired rows is 0, so after row assignment overlapped_p in | |
3244 | current rows is 0. */ | |
3245 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
3246 | { | |
e876ff42 | 3247 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
3248 | |
3249 | if (!row->enabled_p) | |
3250 | break; | |
3251 | else if (row->mode_line_p) | |
3252 | continue; | |
177c0ea7 | 3253 | |
408f5064 GM |
3254 | if (row->overlapped_p) |
3255 | { | |
3256 | enum glyph_row_area area; | |
177c0ea7 | 3257 | |
408f5064 GM |
3258 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
3259 | { | |
3260 | updated_row = row; | |
3261 | updated_area = area; | |
fa971ac3 KL |
3262 | FRAME_RIF (f)->cursor_to (i, 0, row->y, |
3263 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 3264 | if (row->used[area]) |
fa971ac3 KL |
3265 | FRAME_RIF (f)->write_glyphs (row->glyphs[area], |
3266 | row->used[area]); | |
3267 | FRAME_RIF (f)->clear_end_of_line (-1); | |
408f5064 | 3268 | } |
177c0ea7 | 3269 | |
408f5064 GM |
3270 | row->overlapped_p = 0; |
3271 | } | |
3272 | ||
e876ff42 | 3273 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
3274 | break; |
3275 | } | |
3276 | } | |
3277 | ||
3278 | ||
3279 | /* Redraw lines from the current matrix of window W that overlap | |
3280 | others. YB is bottom-most y-position in W. */ | |
3281 | ||
3282 | static void | |
971de7fb | 3283 | redraw_overlapping_rows (struct window *w, int yb) |
408f5064 GM |
3284 | { |
3285 | int i, bottom_y; | |
3286 | struct glyph_row *row; | |
fa971ac3 | 3287 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
3fc809e2 | 3288 | |
408f5064 GM |
3289 | for (i = 0; i < w->current_matrix->nrows; ++i) |
3290 | { | |
3291 | row = w->current_matrix->rows + i; | |
3292 | ||
3293 | if (!row->enabled_p) | |
3294 | break; | |
3295 | else if (row->mode_line_p) | |
3296 | continue; | |
177c0ea7 | 3297 | |
408f5064 GM |
3298 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
3299 | ||
b4b2c2ca | 3300 | if (row->overlapping_p) |
408f5064 | 3301 | { |
41124e06 YM |
3302 | int overlaps = 0; |
3303 | ||
b4b2c2ca | 3304 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) && i > 0 |
41124e06 YM |
3305 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) |
3306 | overlaps |= OVERLAPS_PRED; | |
b4b2c2ca | 3307 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) && bottom_y < yb |
41124e06 YM |
3308 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) |
3309 | overlaps |= OVERLAPS_SUCC; | |
3310 | ||
3311 | if (overlaps) | |
3312 | { | |
3313 | if (row->used[LEFT_MARGIN_AREA]) | |
3314 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
3315 | ||
3316 | if (row->used[TEXT_AREA]) | |
3317 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
3318 | ||
3319 | if (row->used[RIGHT_MARGIN_AREA]) | |
3320 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
3321 | ||
c5e87d10 | 3322 | /* Record in neighbor rows that ROW overwrites part of |
41124e06 YM |
3323 | their display. */ |
3324 | if (overlaps & OVERLAPS_PRED) | |
3325 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
3326 | if (overlaps & OVERLAPS_SUCC) | |
3327 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
3328 | } | |
408f5064 GM |
3329 | } |
3330 | ||
3331 | if (bottom_y >= yb) | |
3332 | break; | |
3333 | } | |
3334 | } | |
3335 | ||
93e023fc KS |
3336 | #endif /* HAVE_WINDOW_SYSTEM */ |
3337 | ||
408f5064 | 3338 | |
09ad5a91 | 3339 | #if defined GLYPH_DEBUG && 0 |
93962bfa GM |
3340 | |
3341 | /* Check that no row in the current matrix of window W is enabled | |
3342 | which is below what's displayed in the window. */ | |
3343 | ||
09ad5a91 | 3344 | static void |
971de7fb | 3345 | check_current_matrix_flags (struct window *w) |
93962bfa | 3346 | { |
59ea14cd | 3347 | bool last_seen_p = 0; |
93962bfa GM |
3348 | int i, yb = window_text_bottom_y (w); |
3349 | ||
3350 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
3351 | { | |
3352 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
3353 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3354 | last_seen_p = 1; | |
3355 | else if (last_seen_p && row->enabled_p) | |
1088b922 | 3356 | emacs_abort (); |
93962bfa GM |
3357 | } |
3358 | } | |
3359 | ||
3360 | #endif /* GLYPH_DEBUG */ | |
3361 | ||
3362 | ||
59ea14cd PE |
3363 | /* Update display of window W. |
3364 | If FORCE_P, don't stop updating when input is pending. */ | |
5f5c8ee5 | 3365 | |
59ea14cd PE |
3366 | static bool |
3367 | update_window (struct window *w, bool force_p) | |
4588ec20 | 3368 | { |
5f5c8ee5 | 3369 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
59ea14cd | 3370 | bool paused_p; |
5f5c8ee5 | 3371 | int preempt_count = baud_rate / 2400 + 1; |
597cfb3f | 3372 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
e509cfa6 | 3373 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 3374 | /* Check that W's frame doesn't have glyph matrices. */ |
a54e2c05 | 3375 | eassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 3376 | #endif |
5f5c8ee5 GM |
3377 | |
3378 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb | 3379 | if (!force_p) |
a2d5fca0 | 3380 | detect_input_pending_ignore_squeezables (); |
4588ec20 | 3381 | |
5f5c8ee5 GM |
3382 | /* If forced to complete the update, or if no input is pending, do |
3383 | the update. */ | |
8fd9a666 | 3384 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 3385 | { |
5f5c8ee5 GM |
3386 | struct glyph_row *row, *end; |
3387 | struct glyph_row *mode_line_row; | |
56974e03 | 3388 | struct glyph_row *header_line_row; |
59ea14cd PE |
3389 | int yb; |
3390 | bool changed_p = 0, mouse_face_overwritten_p = 0; | |
0bc32927 | 3391 | int n_updated = 0; |
5f5c8ee5 GM |
3392 | |
3393 | rif->update_window_begin_hook (w); | |
3394 | yb = window_text_bottom_y (w); | |
5f5c8ee5 GM |
3395 | row = desired_matrix->rows; |
3396 | end = row + desired_matrix->nrows - 1; | |
177c0ea7 | 3397 | |
394305db EZ |
3398 | /* Take note of the header line, if there is one. We will |
3399 | update it below, after updating all of the window's lines. */ | |
5f5c8ee5 | 3400 | if (row->mode_line_p) |
56974e03 GM |
3401 | { |
3402 | header_line_row = row; | |
3403 | ++row; | |
3404 | } | |
3405 | else | |
3406 | header_line_row = NULL; | |
5f5c8ee5 GM |
3407 | |
3408 | /* Update the mode line, if necessary. */ | |
3409 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
3410 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
3411 | { | |
3412 | mode_line_row->y = yb; | |
3413 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
3414 | desired_matrix), |
3415 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3416 | } |
3417 | ||
3418 | /* Find first enabled row. Optimizations in redisplay_internal | |
3419 | may lead to an update with only one row enabled. There may | |
3420 | be also completely empty matrices. */ | |
3421 | while (row < end && !row->enabled_p) | |
3422 | ++row; | |
177c0ea7 | 3423 | |
bfdcafe1 | 3424 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 3425 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
3426 | { |
3427 | int rc = scrolling_window (w, header_line_row != NULL); | |
3428 | if (rc < 0) | |
3429 | { | |
3430 | /* All rows were found to be equal. */ | |
3431 | paused_p = 0; | |
3432 | goto set_cursor; | |
3433 | } | |
3434 | else if (rc > 0) | |
6b61353c KH |
3435 | { |
3436 | /* We've scrolled the display. */ | |
3437 | force_p = 1; | |
3438 | changed_p = 1; | |
3439 | } | |
5f5c8ee5 GM |
3440 | } |
3441 | ||
3442 | /* Update the rest of the lines. */ | |
0bc32927 | 3443 | for (; row < end && (force_p || !input_pending); ++row) |
394305db EZ |
3444 | /* scrolling_window resets the enabled_p flag of the rows it |
3445 | reuses from current_matrix. */ | |
b7412313 | 3446 | if (row->enabled_p) |
5f5c8ee5 GM |
3447 | { |
3448 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
3449 | int i; | |
177c0ea7 | 3450 | |
153a073c | 3451 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
3452 | detect_input_pending. If it's done too often, |
3453 | scrolling large windows with repeated scroll-up | |
3454 | commands will too quickly pause redisplay. */ | |
e87b8809 | 3455 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 3456 | detect_input_pending_ignore_squeezables (); |
e876ff42 GM |
3457 | changed_p |= update_window_line (w, vpos, |
3458 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3459 | |
3460 | /* Mark all rows below the last visible one in the current | |
3461 | matrix as invalid. This is necessary because of | |
3462 | variable line heights. Consider the case of three | |
3463 | successive redisplays, where the first displays 5 | |
3464 | lines, the second 3 lines, and the third 5 lines again. | |
3465 | If the second redisplay wouldn't mark rows in the | |
3466 | current matrix invalid, the third redisplay might be | |
3467 | tempted to optimize redisplay based on lines displayed | |
3468 | in the first redisplay. */ | |
3469 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3470 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
3471 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
3472 | } | |
3473 | ||
3474 | /* Was display preempted? */ | |
3475 | paused_p = row < end; | |
177c0ea7 | 3476 | |
56974e03 | 3477 | set_cursor: |
177c0ea7 | 3478 | |
6b61353c KH |
3479 | /* Update the header line after scrolling because a new header |
3480 | line would otherwise overwrite lines at the top of the window | |
3481 | that can be scrolled. */ | |
3482 | if (header_line_row && header_line_row->enabled_p) | |
3483 | { | |
3484 | header_line_row->y = 0; | |
3485 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
6b61353c KH |
3486 | } |
3487 | ||
153a073c | 3488 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
3489 | if (!paused_p && !w->pseudo_window_p) |
3490 | { | |
93e023fc | 3491 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
3492 | if (changed_p && rif->fix_overlapping_area) |
3493 | { | |
3494 | redraw_overlapped_rows (w, yb); | |
3495 | redraw_overlapping_rows (w, yb); | |
3496 | } | |
93e023fc | 3497 | #endif |
177c0ea7 | 3498 | |
5f5c8ee5 GM |
3499 | /* Make cursor visible at cursor position of W. */ |
3500 | set_window_cursor_after_update (w); | |
3501 | ||
e876ff42 GM |
3502 | #if 0 /* Check that current matrix invariants are satisfied. This is |
3503 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
3504 | IF_DEBUG (check_matrix_invariants (w)); |
3505 | #endif | |
4588ec20 | 3506 | } |
5f5c8ee5 | 3507 | |
e509cfa6 | 3508 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
3509 | /* Remember the redisplay method used to display the matrix. */ |
3510 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
3511 | #endif | |
408f5064 | 3512 | |
6b61353c KH |
3513 | #ifdef HAVE_WINDOW_SYSTEM |
3514 | update_window_fringes (w, 0); | |
3515 | #endif | |
3516 | ||
56974e03 GM |
3517 | /* End the update of window W. Don't set the cursor if we |
3518 | paused updating the display because in this case, | |
3519 | set_window_cursor_after_update hasn't been called, and | |
3520 | output_cursor doesn't contain the cursor location. */ | |
3521 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); | |
4588ec20 | 3522 | } |
5f5c8ee5 GM |
3523 | else |
3524 | paused_p = 1; | |
3525 | ||
e509cfa6 | 3526 | #ifdef GLYPH_DEBUG |
0cffd9d8 | 3527 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
3528 | add_window_display_history (w, w->current_matrix->method, paused_p); |
3529 | #endif | |
177c0ea7 | 3530 | |
5f5c8ee5 | 3531 | clear_glyph_matrix (desired_matrix); |
408f5064 | 3532 | |
5f5c8ee5 | 3533 | return paused_p; |
4588ec20 JB |
3534 | } |
3535 | ||
b64b3980 | 3536 | |
5f5c8ee5 GM |
3537 | /* Update the display of area AREA in window W, row number VPOS. |
3538 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
3539 | ||
3540 | static void | |
971de7fb | 3541 | update_marginal_area (struct window *w, int area, int vpos) |
b64b3980 | 3542 | { |
5f5c8ee5 | 3543 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 3544 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
3545 | |
3546 | /* Let functions in xterm.c know what area subsequent X positions | |
3547 | will be relative to. */ | |
3548 | updated_area = area; | |
3549 | ||
3550 | /* Set cursor to start of glyphs, write them, and clear to the end | |
3551 | of the area. I don't think that something more sophisticated is | |
3552 | necessary here, since marginal areas will not be the default. */ | |
3553 | rif->cursor_to (vpos, 0, desired_row->y, 0); | |
3554 | if (desired_row->used[area]) | |
3555 | rif->write_glyphs (desired_row->glyphs[area], desired_row->used[area]); | |
3556 | rif->clear_end_of_line (-1); | |
b64b3980 | 3557 | } |
23b0200c | 3558 | |
352f1545 | 3559 | |
408f5064 | 3560 | /* Update the display of the text area of row VPOS in window W. |
59ea14cd | 3561 | Value is true if display has changed. */ |
5f5c8ee5 | 3562 | |
59ea14cd | 3563 | static bool |
971de7fb | 3564 | update_text_area (struct window *w, int vpos) |
23b0200c | 3565 | { |
5f5c8ee5 GM |
3566 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
3567 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3568 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
59ea14cd | 3569 | bool changed_p = 0; |
5f5c8ee5 GM |
3570 | |
3571 | /* Let functions in xterm.c know what area subsequent X positions | |
3572 | will be relative to. */ | |
3573 | updated_area = TEXT_AREA; | |
177c0ea7 | 3574 | |
5f5c8ee5 GM |
3575 | /* If rows are at different X or Y, or rows have different height, |
3576 | or the current row is marked invalid, write the entire line. */ | |
3577 | if (!current_row->enabled_p | |
3578 | || desired_row->y != current_row->y | |
3579 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
3580 | || desired_row->phys_ascent != current_row->phys_ascent |
3581 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 3582 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 3583 | || current_row->overlapped_p |
fee8b690 CY |
3584 | /* This next line is necessary for correctly redrawing |
3585 | mouse-face areas after scrolling and other operations. | |
3586 | However, it causes excessive flickering when mouse is moved | |
3587 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
3588 | line doesn't seem to hurt anything. -- cyd. |
3589 | But it is still needed for the header line. -- kfs. */ | |
3590 | || (current_row->mouse_face_p | |
3591 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
3592 | || current_row->x != desired_row->x) |
3593 | { | |
3594 | rif->cursor_to (vpos, 0, desired_row->y, desired_row->x); | |
177c0ea7 | 3595 | |
5f5c8ee5 GM |
3596 | if (desired_row->used[TEXT_AREA]) |
3597 | rif->write_glyphs (desired_row->glyphs[TEXT_AREA], | |
3598 | desired_row->used[TEXT_AREA]); | |
177c0ea7 | 3599 | |
5f5c8ee5 GM |
3600 | /* Clear to end of window. */ |
3601 | rif->clear_end_of_line (-1); | |
408f5064 | 3602 | changed_p = 1; |
60f2f3f1 GM |
3603 | |
3604 | /* This erases the cursor. We do this here because | |
3605 | notice_overwritten_cursor cannot easily check this, which | |
3606 | might indicate that the whole functionality of | |
3607 | notice_overwritten_cursor would better be implemented here. | |
3608 | On the other hand, we need notice_overwritten_cursor as long | |
3609 | as mouse highlighting is done asynchronously outside of | |
3610 | redisplay. */ | |
3611 | if (vpos == w->phys_cursor.vpos) | |
3612 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
3613 | } |
3614 | else | |
3615 | { | |
3616 | int stop, i, x; | |
3617 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
3618 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
59ea14cd | 3619 | bool overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 3620 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
59ea14cd | 3621 | bool abort_skipping = 0; |
5f5c8ee5 | 3622 | |
78897758 YM |
3623 | /* If the desired row extends its face to the text area end, and |
3624 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
3625 | make sure we write at least one glyph, so that the face |
3626 | extension actually takes place. */ | |
78897758 YM |
3627 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
3628 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
3629 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
3630 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 3631 | --desired_stop_pos; |
177c0ea7 | 3632 | |
5f5c8ee5 GM |
3633 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
3634 | i = 0; | |
3635 | x = desired_row->x; | |
8399f8a0 GM |
3636 | |
3637 | /* Loop over glyphs that current and desired row may have | |
3638 | in common. */ | |
5f5c8ee5 | 3639 | while (i < stop) |
352f1545 | 3640 | { |
59ea14cd | 3641 | bool can_skip_p = !abort_skipping; |
177c0ea7 | 3642 | |
5f5c8ee5 | 3643 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
3644 | don't have to be written. We can't skip if the last |
3645 | current glyph overlaps the glyph to its right. For | |
3646 | example, consider a current row of `if ' with the `f' in | |
3647 | Courier bold so that it overlaps the ` ' to its right. | |
3648 | If the desired row is ` ', we would skip over the space | |
3649 | after the `if' and there would remain a pixel from the | |
3650 | `f' on the screen. */ | |
3651 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 3652 | { |
e47306e6 GM |
3653 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
3654 | int left, right; | |
177c0ea7 | 3655 | |
d3d50620 | 3656 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
e47306e6 | 3657 | &left, &right); |
91d227d9 | 3658 | can_skip_p = (right == 0 && !abort_skipping); |
352f1545 | 3659 | } |
177c0ea7 | 3660 | |
6d950f4c | 3661 | if (can_skip_p) |
352f1545 | 3662 | { |
91d227d9 CY |
3663 | int start_hpos = i; |
3664 | ||
6d950f4c GM |
3665 | while (i < stop |
3666 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
3667 | { | |
3668 | x += desired_glyph->pixel_width; | |
3669 | ++desired_glyph, ++current_glyph, ++i; | |
3670 | } | |
3671 | ||
3672 | /* Consider the case that the current row contains "xxx | |
3673 | ppp ggg" in italic Courier font, and the desired row | |
3674 | is "xxx ggg". The character `p' has lbearing, `g' | |
3675 | has not. The loop above will stop in front of the | |
3676 | first `p' in the current row. If we would start | |
3677 | writing glyphs there, we wouldn't erase the lbearing | |
3678 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 3679 | taken care of by draw_glyphs. */ |
6d950f4c GM |
3680 | if (overlapping_glyphs_p |
3681 | && i > 0 | |
3682 | && i < current_row->used[TEXT_AREA] | |
3683 | && (current_row->used[TEXT_AREA] | |
3684 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 3685 | { |
6d950f4c | 3686 | int left, right; |
177c0ea7 | 3687 | |
3a45383a | 3688 | rif->get_glyph_overhangs (current_glyph, |
d3d50620 | 3689 | XFRAME (w->frame), |
6d950f4c GM |
3690 | &left, &right); |
3691 | while (left > 0 && i > 0) | |
3692 | { | |
3693 | --i, --desired_glyph, --current_glyph; | |
3694 | x -= desired_glyph->pixel_width; | |
3695 | left -= desired_glyph->pixel_width; | |
3696 | } | |
91d227d9 CY |
3697 | |
3698 | /* Abort the skipping algorithm if we end up before | |
3699 | our starting point, to avoid looping (bug#1070). | |
3700 | This can happen when the lbearing is larger than | |
3701 | the pixel width. */ | |
3702 | abort_skipping = (i < start_hpos); | |
5f5c8ee5 | 3703 | } |
352f1545 | 3704 | } |
177c0ea7 | 3705 | |
5f5c8ee5 GM |
3706 | /* Try to avoid writing the entire rest of the desired row |
3707 | by looking for a resync point. This mainly prevents | |
3708 | mode line flickering in the case the mode line is in | |
3709 | fixed-pitch font, which it usually will be. */ | |
3710 | if (i < desired_row->used[TEXT_AREA]) | |
3711 | { | |
3712 | int start_x = x, start_hpos = i; | |
3713 | struct glyph *start = desired_glyph; | |
3714 | int current_x = x; | |
59ea14cd | 3715 | bool skip_first_p = !can_skip_p; |
6d950f4c | 3716 | |
5f5c8ee5 GM |
3717 | /* Find the next glyph that's equal again. */ |
3718 | while (i < stop | |
6d950f4c GM |
3719 | && (skip_first_p |
3720 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
3721 | && x == current_x) |
3722 | { | |
3723 | x += desired_glyph->pixel_width; | |
3724 | current_x += current_glyph->pixel_width; | |
3725 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 3726 | skip_first_p = 0; |
5f5c8ee5 | 3727 | } |
23b0200c | 3728 | |
5f5c8ee5 GM |
3729 | if (i == start_hpos || x != current_x) |
3730 | { | |
3731 | i = start_hpos; | |
3732 | x = start_x; | |
3733 | desired_glyph = start; | |
3734 | break; | |
3735 | } | |
e47306e6 | 3736 | |
5f5c8ee5 GM |
3737 | rif->cursor_to (vpos, start_hpos, desired_row->y, start_x); |
3738 | rif->write_glyphs (start, i - start_hpos); | |
408f5064 | 3739 | changed_p = 1; |
5f5c8ee5 GM |
3740 | } |
3741 | } | |
177c0ea7 | 3742 | |
5f5c8ee5 GM |
3743 | /* Write the rest. */ |
3744 | if (i < desired_row->used[TEXT_AREA]) | |
3745 | { | |
3746 | rif->cursor_to (vpos, i, desired_row->y, x); | |
3747 | rif->write_glyphs (desired_glyph, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 3748 | changed_p = 1; |
5f5c8ee5 | 3749 | } |
177c0ea7 | 3750 | |
5f5c8ee5 GM |
3751 | /* Maybe clear to end of line. */ |
3752 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
3753 | { | |
3754 | /* If new row extends to the end of the text area, nothing | |
3755 | has to be cleared, if and only if we did a write_glyphs | |
3756 | above. This is made sure by setting desired_stop_pos | |
3757 | appropriately above. */ | |
a54e2c05 | 3758 | eassert (i < desired_row->used[TEXT_AREA] |
78897758 YM |
3759 | || ((desired_row->used[TEXT_AREA] |
3760 | == current_row->used[TEXT_AREA]) | |
3761 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
3762 | } |
3763 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
3764 | { | |
3765 | /* If old row extends to the end of the text area, clear. */ | |
3766 | if (i >= desired_row->used[TEXT_AREA]) | |
3767 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3768 | desired_row->pixel_width); |
5f5c8ee5 | 3769 | rif->clear_end_of_line (-1); |
408f5064 | 3770 | changed_p = 1; |
5f5c8ee5 GM |
3771 | } |
3772 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 3773 | { |
5f5c8ee5 GM |
3774 | /* Otherwise clear to the end of the old row. Everything |
3775 | after that position should be clear already. */ | |
27786b2f | 3776 | int xlim; |
177c0ea7 | 3777 | |
5f5c8ee5 GM |
3778 | if (i >= desired_row->used[TEXT_AREA]) |
3779 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3780 | desired_row->pixel_width); |
5f5c8ee5 GM |
3781 | |
3782 | /* If cursor is displayed at the end of the line, make sure | |
3783 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
3784 | with which to erase the cursor (because this method | |
3785 | doesn't work with lbearing/rbearing), so we must do it | |
3786 | this way. */ | |
3787 | if (vpos == w->phys_cursor.vpos | |
f951a506 EZ |
3788 | && (desired_row->reversed_p |
3789 | ? (w->phys_cursor.hpos < 0) | |
3790 | : (w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]))) | |
5f5c8ee5 GM |
3791 | { |
3792 | w->phys_cursor_on_p = 0; | |
27786b2f | 3793 | xlim = -1; |
5f5c8ee5 GM |
3794 | } |
3795 | else | |
27786b2f PE |
3796 | xlim = current_row->pixel_width; |
3797 | rif->clear_end_of_line (xlim); | |
408f5064 | 3798 | changed_p = 1; |
2e8907d3 | 3799 | } |
23b0200c | 3800 | } |
408f5064 GM |
3801 | |
3802 | return changed_p; | |
23b0200c | 3803 | } |
4588ec20 | 3804 | |
5f5c8ee5 | 3805 | |
59ea14cd | 3806 | /* Update row VPOS in window W. Value is true if display has been changed. */ |
5f5c8ee5 | 3807 | |
59ea14cd PE |
3808 | static bool |
3809 | update_window_line (struct window *w, int vpos, bool *mouse_face_overwritten_p) | |
5f5c8ee5 GM |
3810 | { |
3811 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
3812 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3813 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
59ea14cd | 3814 | bool changed_p = 0; |
5f5c8ee5 | 3815 | |
5f5c8ee5 GM |
3816 | /* Set the row being updated. This is important to let xterm.c |
3817 | know what line height values are in effect. */ | |
3818 | updated_row = desired_row; | |
3819 | ||
177c0ea7 JB |
3820 | /* A row can be completely invisible in case a desired matrix was |
3821 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
3822 | the matrix. Make sure to make such rows current anyway, since |
3823 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
3824 | if (desired_row->mode_line_p |
3825 | || desired_row->visible_height > 0) | |
408f5064 | 3826 | { |
a54e2c05 | 3827 | eassert (desired_row->enabled_p); |
504805ac GM |
3828 | |
3829 | /* Update display of the left margin area, if there is one. */ | |
3830 | if (!desired_row->full_width_p | |
d3d50620 | 3831 | && !NILP (w->left_margin_cols)) |
504805ac GM |
3832 | { |
3833 | changed_p = 1; | |
3834 | update_marginal_area (w, LEFT_MARGIN_AREA, vpos); | |
e9957956 EZ |
3835 | /* Setting this flag will ensure the vertical border, if |
3836 | any, between this window and the one on its left will be | |
3837 | redrawn. This is necessary because updating the left | |
3838 | margin area can potentially draw over the border. */ | |
3839 | current_row->redraw_fringe_bitmaps_p = 1; | |
504805ac | 3840 | } |
177c0ea7 | 3841 | |
504805ac GM |
3842 | /* Update the display of the text area. */ |
3843 | if (update_text_area (w, vpos)) | |
3844 | { | |
3845 | changed_p = 1; | |
3846 | if (current_row->mouse_face_p) | |
3847 | *mouse_face_overwritten_p = 1; | |
3848 | } | |
177c0ea7 | 3849 | |
504805ac GM |
3850 | /* Update display of the right margin area, if there is one. */ |
3851 | if (!desired_row->full_width_p | |
d3d50620 | 3852 | && !NILP (w->right_margin_cols)) |
504805ac GM |
3853 | { |
3854 | changed_p = 1; | |
3855 | update_marginal_area (w, RIGHT_MARGIN_AREA, vpos); | |
3856 | } | |
177c0ea7 | 3857 | |
504805ac GM |
3858 | /* Draw truncation marks etc. */ |
3859 | if (!current_row->enabled_p | |
3860 | || desired_row->y != current_row->y | |
3861 | || desired_row->visible_height != current_row->visible_height | |
6b61353c | 3862 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 3863 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
6b61353c | 3864 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 3865 | || desired_row->mode_line_p != current_row->mode_line_p |
6b61353c | 3866 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
3867 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
3868 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
3869 | rif->after_update_window_line_hook (desired_row); | |
408f5064 | 3870 | } |
177c0ea7 | 3871 | |
5f5c8ee5 GM |
3872 | /* Update current_row from desired_row. */ |
3873 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
3874 | updated_row = NULL; | |
408f5064 | 3875 | return changed_p; |
5f5c8ee5 GM |
3876 | } |
3877 | ||
3878 | ||
3879 | /* Set the cursor after an update of window W. This function may only | |
3880 | be called from update_window. */ | |
3881 | ||
3882 | static void | |
971de7fb | 3883 | set_window_cursor_after_update (struct window *w) |
4588ec20 | 3884 | { |
d3d50620 | 3885 | struct frame *f = XFRAME (w->frame); |
fa971ac3 | 3886 | struct redisplay_interface *rif = FRAME_RIF (f); |
5f5c8ee5 GM |
3887 | int cx, cy, vpos, hpos; |
3888 | ||
3889 | /* Not intended for frame matrix updates. */ | |
a54e2c05 | 3890 | eassert (FRAME_WINDOW_P (f)); |
177c0ea7 | 3891 | |
b96fd3e8 GM |
3892 | if (cursor_in_echo_area |
3893 | && !NILP (echo_area_buffer[0]) | |
3894 | /* If we are showing a message instead of the mini-buffer, | |
3895 | show the cursor for the message instead. */ | |
3896 | && XWINDOW (minibuf_window) == w | |
3897 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
3898 | /* These cases apply only to the frame that contains |
3899 | the active mini-buffer window. */ | |
3900 | && FRAME_HAS_MINIBUF_P (f) | |
3901 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
3902 | { | |
3903 | cx = cy = vpos = hpos = 0; | |
3904 | ||
3905 | if (cursor_in_echo_area >= 0) | |
3906 | { | |
3907 | /* If the mini-buffer is several lines high, find the last | |
3908 | line that has any text on it. Note: either all lines | |
3909 | are enabled or none. Otherwise we wouldn't be able to | |
3910 | determine Y. */ | |
862b4790 GM |
3911 | struct glyph_row *row, *last_row; |
3912 | struct glyph *glyph; | |
3913 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 3914 | |
862b4790 | 3915 | last_row = NULL; |
6206f8ce GM |
3916 | row = w->current_matrix->rows; |
3917 | while (row->enabled_p | |
3918 | && (last_row == NULL | |
3919 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 3920 | { |
862b4790 GM |
3921 | if (row->used[TEXT_AREA] |
3922 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
3923 | last_row = row; | |
6206f8ce | 3924 | ++row; |
862b4790 | 3925 | } |
177c0ea7 | 3926 | |
5f5c8ee5 GM |
3927 | if (last_row) |
3928 | { | |
6206f8ce GM |
3929 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
3930 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 3931 | |
b96fd3e8 | 3932 | while (last > start && last->charpos < 0) |
862b4790 | 3933 | --last; |
177c0ea7 | 3934 | |
862b4790 GM |
3935 | for (glyph = start; glyph < last; ++glyph) |
3936 | { | |
3937 | cx += glyph->pixel_width; | |
3938 | ++hpos; | |
3939 | } | |
3940 | ||
5f5c8ee5 | 3941 | cy = last_row->y; |
862b4790 | 3942 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
3943 | } |
3944 | } | |
3945 | } | |
3946 | else | |
3947 | { | |
3948 | cx = w->cursor.x; | |
3949 | cy = w->cursor.y; | |
3950 | hpos = w->cursor.hpos; | |
3951 | vpos = w->cursor.vpos; | |
3952 | } | |
4588ec20 | 3953 | |
2dd61a9b | 3954 | /* Window cursor can be out of sync for horizontally split windows. |
cccaebd2 | 3955 | Horizontal position is -1 when cursor is on the left fringe. */ |
2dd61a9b DA |
3956 | hpos = clip_to_bounds (-1, hpos, w->current_matrix->matrix_w - 1); |
3957 | vpos = clip_to_bounds (0, vpos, w->current_matrix->nrows - 1); | |
5f5c8ee5 | 3958 | rif->cursor_to (vpos, hpos, cy, cx); |
4588ec20 | 3959 | } |
4588ec20 | 3960 | |
5f5c8ee5 | 3961 | |
6df5d75f GM |
3962 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window |
3963 | tree rooted at W. */ | |
3964 | ||
3965 | void | |
59ea14cd | 3966 | set_window_update_flags (struct window *w, bool on_p) |
6df5d75f GM |
3967 | { |
3968 | while (w) | |
3969 | { | |
d3d50620 DA |
3970 | if (!NILP (w->hchild)) |
3971 | set_window_update_flags (XWINDOW (w->hchild), on_p); | |
3972 | else if (!NILP (w->vchild)) | |
3973 | set_window_update_flags (XWINDOW (w->vchild), on_p); | |
6df5d75f GM |
3974 | else |
3975 | w->must_be_updated_p = on_p; | |
3976 | ||
d3d50620 | 3977 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
6df5d75f | 3978 | } |
177c0ea7 | 3979 | } |
6df5d75f GM |
3980 | |
3981 | ||
3982 | \f | |
3983 | /*********************************************************************** | |
3984 | Window-Based Scrolling | |
3985 | ***********************************************************************/ | |
3986 | ||
3987 | /* Structure describing rows in scrolling_window. */ | |
3988 | ||
3989 | struct row_entry | |
3990 | { | |
3991 | /* Number of occurrences of this row in desired and current matrix. */ | |
3992 | int old_uses, new_uses; | |
177c0ea7 | 3993 | |
6df5d75f GM |
3994 | /* Vpos of row in new matrix. */ |
3995 | int new_line_number; | |
3996 | ||
3997 | /* Bucket index of this row_entry in the hash table row_table. */ | |
ca9ce8f2 | 3998 | ptrdiff_t bucket; |
177c0ea7 | 3999 | |
6df5d75f GM |
4000 | /* The row described by this entry. */ |
4001 | struct glyph_row *row; | |
177c0ea7 | 4002 | |
6df5d75f GM |
4003 | /* Hash collision chain. */ |
4004 | struct row_entry *next; | |
4005 | }; | |
4006 | ||
4007 | /* A pool to allocate row_entry structures from, and the size of the | |
4008 | pool. The pool is reallocated in scrolling_window when we find | |
4009 | that we need a larger one. */ | |
4010 | ||
4011 | static struct row_entry *row_entry_pool; | |
ca9ce8f2 | 4012 | static ptrdiff_t row_entry_pool_size; |
6df5d75f GM |
4013 | |
4014 | /* Index of next free entry in row_entry_pool. */ | |
4015 | ||
ca9ce8f2 | 4016 | static ptrdiff_t row_entry_idx; |
6df5d75f GM |
4017 | |
4018 | /* The hash table used during scrolling, and the table's size. This | |
4019 | table is used to quickly identify equal rows in the desired and | |
4020 | current matrix. */ | |
4021 | ||
4022 | static struct row_entry **row_table; | |
ca9ce8f2 | 4023 | static ptrdiff_t row_table_size; |
6df5d75f GM |
4024 | |
4025 | /* Vectors of pointers to row_entry structures belonging to the | |
4026 | current and desired matrix, and the size of the vectors. */ | |
4027 | ||
4028 | static struct row_entry **old_lines, **new_lines; | |
0065d054 | 4029 | static ptrdiff_t old_lines_size, new_lines_size; |
6df5d75f GM |
4030 | |
4031 | /* A pool to allocate run structures from, and its size. */ | |
4032 | ||
4033 | static struct run *run_pool; | |
0065d054 | 4034 | static ptrdiff_t runs_size; |
6df5d75f GM |
4035 | |
4036 | /* A vector of runs of lines found during scrolling. */ | |
4037 | ||
4038 | static struct run **runs; | |
4039 | ||
6b1f9ba4 | 4040 | /* Add glyph row ROW to the scrolling hash table. */ |
6df5d75f | 4041 | |
b0ab8123 | 4042 | static struct row_entry * |
6b1f9ba4 | 4043 | add_row_entry (struct glyph_row *row) |
6df5d75f GM |
4044 | { |
4045 | struct row_entry *entry; | |
ca9ce8f2 | 4046 | ptrdiff_t i = row->hash % row_table_size; |
177c0ea7 | 4047 | |
6df5d75f | 4048 | entry = row_table[i]; |
a54e2c05 | 4049 | eassert (entry || verify_row_hash (row)); |
6b1f9ba4 | 4050 | while (entry && !row_equal_p (entry->row, row, 1)) |
6df5d75f | 4051 | entry = entry->next; |
177c0ea7 | 4052 | |
6df5d75f GM |
4053 | if (entry == NULL) |
4054 | { | |
4055 | entry = row_entry_pool + row_entry_idx++; | |
4056 | entry->row = row; | |
4057 | entry->old_uses = entry->new_uses = 0; | |
4058 | entry->new_line_number = 0; | |
4059 | entry->bucket = i; | |
4060 | entry->next = row_table[i]; | |
4061 | row_table[i] = entry; | |
4062 | } | |
4063 | ||
4064 | return entry; | |
4065 | } | |
4066 | ||
4067 | ||
5f5c8ee5 | 4068 | /* Try to reuse part of the current display of W by scrolling lines. |
59ea14cd | 4069 | HEADER_LINE_P means W has a header line. |
5f5c8ee5 GM |
4070 | |
4071 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4072 | Technique for Isolating Differences Between Files." It should take | |
4073 | O(N) time. | |
4074 | ||
4075 | A short outline of the steps of the algorithm | |
4076 | ||
4077 | 1. Skip lines equal at the start and end of both matrices. | |
4078 | ||
4079 | 2. Enter rows in the current and desired matrix into a symbol | |
4080 | table, counting how often they appear in both matrices. | |
4081 | ||
4082 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4083 | i.e. we assume that such lines are likely to have been moved. | |
4084 | ||
4085 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4086 | forward and backward. | |
4087 | ||
4088 | Value is | |
4089 | ||
4090 | -1 if all rows were found to be equal. | |
4091 | 0 to indicate that we did not scroll the display, or | |
4092 | 1 if we did scroll. */ | |
4093 | ||
4094 | static int | |
59ea14cd | 4095 | scrolling_window (struct window *w, bool header_line_p) |
4588ec20 | 4096 | { |
5f5c8ee5 GM |
4097 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4098 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4099 | int yb = window_text_bottom_y (w); | |
ca9ce8f2 PE |
4100 | ptrdiff_t i; |
4101 | int j, first_old, first_new, last_old, last_new; | |
4102 | int nruns, run_idx; | |
0065d054 | 4103 | ptrdiff_t n; |
6df5d75f | 4104 | struct row_entry *entry; |
fa971ac3 | 4105 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4106 | |
4107 | /* Skip over rows equal at the start. */ | |
59ea14cd | 4108 | for (i = header_line_p; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4109 | { |
bfdcafe1 GM |
4110 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4111 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4112 | ||
4113 | if (c->enabled_p | |
4114 | && d->enabled_p | |
6b61353c | 4115 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4116 | && c->y == d->y |
4117 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4118 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
6b1f9ba4 | 4119 | && row_equal_p (c, d, 1)) |
bfdcafe1 GM |
4120 | { |
4121 | assign_row (c, d); | |
4122 | d->enabled_p = 0; | |
4123 | } | |
4124 | else | |
4125 | break; | |
5f5c8ee5 | 4126 | } |
4588ec20 | 4127 | |
5f5c8ee5 GM |
4128 | /* Give up if some rows in the desired matrix are not enabled. */ |
4129 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4130 | return -1; | |
177c0ea7 | 4131 | |
5f5c8ee5 GM |
4132 | first_old = first_new = i; |
4133 | ||
4d8ade89 YM |
4134 | /* Set last_new to the index + 1 of the row that reaches the |
4135 | bottom boundary in the desired matrix. Give up if we find a | |
4136 | disabled row before we reach the bottom boundary. */ | |
5f5c8ee5 | 4137 | i = first_new + 1; |
4d8ade89 YM |
4138 | while (i < desired_matrix->nrows - 1) |
4139 | { | |
4140 | int bottom; | |
5f5c8ee5 | 4141 | |
4d8ade89 YM |
4142 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) |
4143 | return 0; | |
4144 | bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)); | |
4145 | if (bottom <= yb) | |
4146 | ++i; | |
4147 | if (bottom >= yb) | |
4148 | break; | |
4149 | } | |
5f5c8ee5 GM |
4150 | |
4151 | last_new = i; | |
4152 | ||
4d8ade89 YM |
4153 | /* Set last_old to the index + 1 of the row that reaches the bottom |
4154 | boundary in the current matrix. We don't look at the enabled | |
4155 | flag here because we plan to reuse part of the display even if | |
4156 | other parts are disabled. */ | |
5f5c8ee5 | 4157 | i = first_old + 1; |
93962bfa GM |
4158 | while (i < current_matrix->nrows - 1) |
4159 | { | |
4160 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4161 | if (bottom <= yb) | |
4162 | ++i; | |
4163 | if (bottom >= yb) | |
4164 | break; | |
4165 | } | |
4166 | ||
5f5c8ee5 GM |
4167 | last_old = i; |
4168 | ||
4169 | /* Skip over rows equal at the bottom. */ | |
4170 | i = last_new; | |
4171 | j = last_old; | |
4172 | while (i - 1 > first_new | |
4173 | && j - 1 > first_old | |
1e5b2111 EZ |
4174 | && MATRIX_ROW (current_matrix, j - 1)->enabled_p |
4175 | && (MATRIX_ROW (current_matrix, j - 1)->y | |
4176 | == MATRIX_ROW (desired_matrix, i - 1)->y) | |
4177 | && !MATRIX_ROW (desired_matrix, i - 1)->redraw_fringe_bitmaps_p | |
6b1f9ba4 | 4178 | && row_equal_p (MATRIX_ROW (desired_matrix, i - 1), |
e4e0bee9 | 4179 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
4180 | --i, --j; |
4181 | last_new = i; | |
4182 | last_old = j; | |
4183 | ||
4184 | /* Nothing to do if all rows are equal. */ | |
4185 | if (last_new == first_new) | |
4186 | return 0; | |
4187 | ||
0065d054 | 4188 | /* Check for integer overflow in size calculation. |
ca9ce8f2 PE |
4189 | |
4190 | If next_almost_prime checks (N) for divisibility by 2..10, then | |
4191 | it can return at most N + 10, e.g., next_almost_prime (1) == 11. | |
4192 | So, set next_almost_prime_increment_max to 10. | |
4193 | ||
4194 | It's just a coincidence that next_almost_prime_increment_max == | |
4195 | NEXT_ALMOST_PRIME_LIMIT - 1. If NEXT_ALMOST_PRIME_LIMIT were | |
4196 | 13, then next_almost_prime_increment_max would be 14, e.g., | |
4197 | because next_almost_prime (113) would be 127. */ | |
4198 | { | |
4199 | verify (NEXT_ALMOST_PRIME_LIMIT == 11); | |
4200 | enum { next_almost_prime_increment_max = 10 }; | |
ca9ce8f2 | 4201 | ptrdiff_t row_table_max = |
0065d054 PE |
4202 | (min (PTRDIFF_MAX, SIZE_MAX) / (3 * sizeof *row_table) |
4203 | - next_almost_prime_increment_max); | |
4204 | ptrdiff_t current_nrows_max = row_table_max - desired_matrix->nrows; | |
4205 | if (current_nrows_max < current_matrix->nrows) | |
ca9ce8f2 PE |
4206 | memory_full (SIZE_MAX); |
4207 | } | |
4208 | ||
6df5d75f | 4209 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 4210 | |
6df5d75f | 4211 | if (current_matrix->nrows > old_lines_size) |
0065d054 PE |
4212 | old_lines = xpalloc (old_lines, &old_lines_size, |
4213 | current_matrix->nrows - old_lines_size, | |
4214 | INT_MAX, sizeof *old_lines); | |
177c0ea7 | 4215 | |
6df5d75f | 4216 | if (desired_matrix->nrows > new_lines_size) |
0065d054 PE |
4217 | new_lines = xpalloc (new_lines, &new_lines_size, |
4218 | desired_matrix->nrows - new_lines_size, | |
4219 | INT_MAX, sizeof *new_lines); | |
6df5d75f | 4220 | |
ca9ce8f2 PE |
4221 | n = desired_matrix->nrows; |
4222 | n += current_matrix->nrows; | |
0065d054 | 4223 | if (row_table_size < 3 * n) |
6df5d75f | 4224 | { |
ca9ce8f2 | 4225 | ptrdiff_t size = next_almost_prime (3 * n); |
0065d054 | 4226 | row_table = xnrealloc (row_table, size, sizeof *row_table); |
ca9ce8f2 | 4227 | row_table_size = size; |
0065d054 | 4228 | memset (row_table, 0, size * sizeof *row_table); |
6df5d75f GM |
4229 | } |
4230 | ||
4231 | if (n > row_entry_pool_size) | |
0065d054 PE |
4232 | row_entry_pool = xpalloc (row_entry_pool, &row_entry_pool_size, |
4233 | n - row_entry_pool_size, | |
4234 | -1, sizeof *row_entry_pool); | |
6df5d75f GM |
4235 | |
4236 | if (desired_matrix->nrows > runs_size) | |
4237 | { | |
0065d054 PE |
4238 | runs = xnrealloc (runs, desired_matrix->nrows, sizeof *runs); |
4239 | run_pool = xnrealloc (run_pool, desired_matrix->nrows, sizeof *run_pool); | |
ca9ce8f2 | 4240 | runs_size = desired_matrix->nrows; |
6df5d75f GM |
4241 | } |
4242 | ||
4243 | nruns = run_idx = 0; | |
4244 | row_entry_idx = 0; | |
4245 | ||
4246 | /* Add rows from the current and desired matrix to the hash table | |
4247 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 4248 | |
5f5c8ee5 GM |
4249 | for (i = first_old; i < last_old; ++i) |
4250 | { | |
4251 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
4252 | { | |
6b1f9ba4 | 4253 | entry = add_row_entry (MATRIX_ROW (current_matrix, i)); |
6df5d75f GM |
4254 | old_lines[i] = entry; |
4255 | ++entry->old_uses; | |
5f5c8ee5 GM |
4256 | } |
4257 | else | |
6df5d75f | 4258 | old_lines[i] = NULL; |
5f5c8ee5 GM |
4259 | } |
4260 | ||
5f5c8ee5 GM |
4261 | for (i = first_new; i < last_new; ++i) |
4262 | { | |
a54e2c05 | 4263 | eassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); |
6b1f9ba4 | 4264 | entry = add_row_entry (MATRIX_ROW (desired_matrix, i)); |
6df5d75f GM |
4265 | ++entry->new_uses; |
4266 | entry->new_line_number = i; | |
4267 | new_lines[i] = entry; | |
5f5c8ee5 | 4268 | } |
4588ec20 | 4269 | |
5f5c8ee5 GM |
4270 | /* Identify moves based on lines that are unique and equal |
4271 | in both matrices. */ | |
4272 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
4273 | if (old_lines[i] |
4274 | && old_lines[i]->old_uses == 1 | |
4275 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 | 4276 | { |
27786b2f | 4277 | int p, q; |
6df5d75f GM |
4278 | int new_line = old_lines[i]->new_line_number; |
4279 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
4280 | |
4281 | /* Record move. */ | |
4282 | run->current_vpos = i; | |
4283 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
4284 | run->desired_vpos = new_line; | |
4285 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
4286 | run->nrows = 1; | |
4287 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
4288 | ||
4289 | /* Extend backward. */ | |
27786b2f PE |
4290 | p = i - 1; |
4291 | q = new_line - 1; | |
4292 | while (p > first_old | |
4293 | && q > first_new | |
4294 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4295 | { |
27786b2f | 4296 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 JB |
4297 | --run->current_vpos; |
4298 | --run->desired_vpos; | |
5f5c8ee5 GM |
4299 | ++run->nrows; |
4300 | run->height += h; | |
4301 | run->desired_y -= h; | |
4302 | run->current_y -= h; | |
27786b2f | 4303 | --p, --q; |
5f5c8ee5 | 4304 | } |
4588ec20 | 4305 | |
5f5c8ee5 | 4306 | /* Extend forward. */ |
27786b2f PE |
4307 | p = i + 1; |
4308 | q = new_line + 1; | |
4309 | while (p < last_old | |
4310 | && q < last_new | |
4311 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4312 | { |
27786b2f | 4313 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 | 4314 | ++run->nrows; |
5f5c8ee5 | 4315 | run->height += h; |
27786b2f | 4316 | ++p, ++q; |
5f5c8ee5 | 4317 | } |
19dff8dc | 4318 | |
5f5c8ee5 GM |
4319 | /* Insert run into list of all runs. Order runs by copied |
4320 | pixel lines. Note that we record runs that don't have to | |
4321 | be copied because they are already in place. This is done | |
4322 | because we can avoid calling update_window_line in this | |
4323 | case. */ | |
27786b2f | 4324 | for (p = 0; p < nruns && runs[p]->height > run->height; ++p) |
5f5c8ee5 | 4325 | ; |
27786b2f PE |
4326 | for (q = nruns; q > p; --q) |
4327 | runs[q] = runs[q - 1]; | |
4328 | runs[p] = run; | |
5f5c8ee5 GM |
4329 | ++nruns; |
4330 | ||
4331 | i += run->nrows; | |
4332 | } | |
4333 | else | |
4334 | ++i; | |
4588ec20 | 4335 | |
5f5c8ee5 GM |
4336 | /* Do the moves. Do it in a way that we don't overwrite something |
4337 | we want to copy later on. This is not solvable in general | |
4338 | because there is only one display and we don't have a way to | |
4339 | exchange areas on this display. Example: | |
4588ec20 | 4340 | |
5f5c8ee5 GM |
4341 | +-----------+ +-----------+ |
4342 | | A | | B | | |
4343 | +-----------+ --> +-----------+ | |
4344 | | B | | A | | |
4345 | +-----------+ +-----------+ | |
4588ec20 | 4346 | |
5f5c8ee5 GM |
4347 | Instead, prefer bigger moves, and invalidate moves that would |
4348 | copy from where we copied to. */ | |
ea0d86af | 4349 | |
5f5c8ee5 GM |
4350 | for (i = 0; i < nruns; ++i) |
4351 | if (runs[i]->nrows > 0) | |
4352 | { | |
4353 | struct run *r = runs[i]; | |
24e86043 | 4354 | |
5f5c8ee5 GM |
4355 | /* Copy on the display. */ |
4356 | if (r->current_y != r->desired_y) | |
4357 | { | |
989b42d2 | 4358 | rif->clear_window_mouse_face (w); |
5f5c8ee5 | 4359 | rif->scroll_run_hook (w, r); |
1305621b | 4360 | } |
5f5c8ee5 | 4361 | |
1305621b YM |
4362 | /* Truncate runs that copy to where we copied to, and |
4363 | invalidate runs that copy from where we copied to. */ | |
4364 | for (j = nruns - 1; j > i; --j) | |
4365 | { | |
4366 | struct run *p = runs[j]; | |
59ea14cd | 4367 | bool truncated_p = 0; |
5f5c8ee5 | 4368 | |
1305621b YM |
4369 | if (p->nrows > 0 |
4370 | && p->desired_y < r->desired_y + r->height | |
4371 | && p->desired_y + p->height > r->desired_y) | |
5f5c8ee5 | 4372 | { |
1305621b YM |
4373 | if (p->desired_y < r->desired_y) |
4374 | { | |
4375 | p->nrows = r->desired_vpos - p->desired_vpos; | |
4376 | p->height = r->desired_y - p->desired_y; | |
4377 | truncated_p = 1; | |
4378 | } | |
4379 | else | |
4380 | { | |
4381 | int nrows_copied = (r->desired_vpos + r->nrows | |
4382 | - p->desired_vpos); | |
4383 | ||
4384 | if (p->nrows <= nrows_copied) | |
4385 | p->nrows = 0; | |
4386 | else | |
4387 | { | |
4388 | int height_copied = (r->desired_y + r->height | |
4389 | - p->desired_y); | |
4390 | ||
4391 | p->current_vpos += nrows_copied; | |
4392 | p->desired_vpos += nrows_copied; | |
4393 | p->nrows -= nrows_copied; | |
4394 | p->current_y += height_copied; | |
4395 | p->desired_y += height_copied; | |
4396 | p->height -= height_copied; | |
4397 | truncated_p = 1; | |
4398 | } | |
4399 | } | |
4400 | } | |
177c0ea7 | 4401 | |
1305621b YM |
4402 | if (r->current_y != r->desired_y |
4403 | /* The condition below is equivalent to | |
4404 | ((p->current_y >= r->desired_y | |
5f5c8ee5 | 4405 | && p->current_y < r->desired_y + r->height) |
1305621b | 4406 | || (p->current_y + p->height > r->desired_y |
5f5c8ee5 | 4407 | && (p->current_y + p->height |
1305621b YM |
4408 | <= r->desired_y + r->height))) |
4409 | because we have 0 < p->height <= r->height. */ | |
4410 | && p->current_y < r->desired_y + r->height | |
4411 | && p->current_y + p->height > r->desired_y) | |
4412 | p->nrows = 0; | |
4413 | ||
4414 | /* Reorder runs by copied pixel lines if truncated. */ | |
4415 | if (truncated_p && p->nrows > 0) | |
4416 | { | |
4417 | int k = nruns - 1; | |
4418 | ||
4419 | while (runs[k]->nrows == 0 || runs[k]->height < p->height) | |
4420 | k--; | |
4421 | memmove (runs + j, runs + j + 1, (k - j) * sizeof (*runs)); | |
4422 | runs[k] = p; | |
5f5c8ee5 GM |
4423 | } |
4424 | } | |
ea0d86af | 4425 | |
5f5c8ee5 GM |
4426 | /* Assign matrix rows. */ |
4427 | for (j = 0; j < r->nrows; ++j) | |
4428 | { | |
4429 | struct glyph_row *from, *to; | |
59ea14cd | 4430 | bool to_overlapped_p; |
e876ff42 | 4431 | |
5f5c8ee5 GM |
4432 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
4433 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 4434 | to_overlapped_p = to->overlapped_p; |
e61124cd | 4435 | from->redraw_fringe_bitmaps_p = from->fringe_bitmap_periodic_p; |
5f5c8ee5 | 4436 | assign_row (to, from); |
1305621b YM |
4437 | /* The above `assign_row' actually does swap, so if we had |
4438 | an overlap in the copy destination of two runs, then | |
4439 | the second run would assign a previously disabled bogus | |
4440 | row. But thanks to the truncation code in the | |
4441 | preceding for-loop, we no longer have such an overlap, | |
4442 | and thus the assigned row should always be enabled. */ | |
a54e2c05 | 4443 | eassert (to->enabled_p); |
1305621b | 4444 | from->enabled_p = 0; |
408f5064 | 4445 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
4446 | } |
4447 | } | |
15874c59 | 4448 | |
6df5d75f GM |
4449 | /* Clear the hash table, for the next time. */ |
4450 | for (i = 0; i < row_entry_idx; ++i) | |
4451 | row_table[row_entry_pool[i].bucket] = NULL; | |
4452 | ||
aec1708a PE |
4453 | /* Value is 1 to indicate that we scrolled the display. */ |
4454 | return 0 < nruns; | |
5f5c8ee5 | 4455 | } |
de83c314 | 4456 | |
15874c59 | 4457 | |
4588ec20 | 4458 | \f |
5f5c8ee5 GM |
4459 | /************************************************************************ |
4460 | Frame-Based Updates | |
4461 | ************************************************************************/ | |
4588ec20 | 4462 | |
5f5c8ee5 | 4463 | /* Update the desired frame matrix of frame F. |
4588ec20 | 4464 | |
59ea14cd PE |
4465 | FORCE_P means that the update should not be stopped by pending input. |
4466 | INHIBIT_HAIRY_ID_P means that scrolling should not be tried. | |
5f5c8ee5 | 4467 | |
59ea14cd | 4468 | Value is true if update was stopped due to pending input. */ |
5f5c8ee5 | 4469 | |
59ea14cd PE |
4470 | static bool |
4471 | update_frame_1 (struct frame *f, bool force_p, bool inhibit_id_p) | |
4588ec20 | 4472 | { |
5f5c8ee5 GM |
4473 | /* Frame matrices to work on. */ |
4474 | struct glyph_matrix *current_matrix = f->current_matrix; | |
4475 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
4476 | int i; | |
59ea14cd | 4477 | bool pause_p; |
4588ec20 | 4478 | int preempt_count = baud_rate / 2400 + 1; |
5f5c8ee5 | 4479 | |
a54e2c05 | 4480 | eassert (current_matrix && desired_matrix); |
4588ec20 | 4481 | |
c37e4889 RS |
4482 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
4483 | calculate_costs (f); | |
4484 | ||
d88c2b9e RS |
4485 | if (preempt_count <= 0) |
4486 | preempt_count = 1; | |
4487 | ||
a2130dbb | 4488 | if (!force_p && detect_input_pending_ignore_squeezables ()) |
4588ec20 | 4489 | { |
27786b2f | 4490 | pause_p = 1; |
4588ec20 JB |
4491 | goto do_pause; |
4492 | } | |
4493 | ||
5f5c8ee5 | 4494 | /* If we cannot insert/delete lines, it's no use trying it. */ |
daf01701 | 4495 | if (!FRAME_LINE_INS_DEL_OK (f)) |
5f5c8ee5 | 4496 | inhibit_id_p = 1; |
7098a0fa | 4497 | |
efb859b4 | 4498 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
4499 | i/d line if just want cursor motion. */ |
4500 | for (i = 0; i < desired_matrix->nrows; i++) | |
4501 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
4502 | break; |
4503 | ||
4504 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
4505 | if (!inhibit_id_p && i < desired_matrix->nrows) |
4506 | force_p |= scrolling (f); | |
4588ec20 JB |
4507 | |
4508 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
4509 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
4510 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 4511 | |
5f5c8ee5 GM |
4512 | /* Now update the rest of the lines. */ |
4513 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 4514 | { |
5f5c8ee5 | 4515 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 4516 | { |
b6a65ac2 | 4517 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
4518 | { |
4519 | /* Flush out every so many lines. | |
4520 | Also flush out if likely to have more than 1k buffered | |
4521 | otherwise. I'm told that some telnet connections get | |
4522 | really screwed by more than 1k output at once. */ | |
fced92f1 CY |
4523 | FILE *display_output = FRAME_TTY (f)->output; |
4524 | if (display_output) | |
4588ec20 | 4525 | { |
8148369c | 4526 | ptrdiff_t outq = __fpending (display_output); |
fced92f1 CY |
4527 | if (outq > 900 |
4528 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
06b63c9b | 4529 | fflush (display_output); |
4588ec20 | 4530 | } |
4588ec20 JB |
4531 | } |
4532 | ||
d012c62b | 4533 | if (!force_p && (i - 1) % preempt_count == 0) |
a2d5fca0 | 4534 | detect_input_pending_ignore_squeezables (); |
a2960116 | 4535 | |
5f5c8ee5 | 4536 | update_frame_line (f, i); |
4588ec20 | 4537 | } |
4588ec20 | 4538 | } |
177c0ea7 | 4539 | |
b98521db | 4540 | lint_assume (0 <= FRAME_LINES (f)); |
59ea14cd | 4541 | pause_p = 0 < i && i < FRAME_LINES (f) - 1; |
4588ec20 JB |
4542 | |
4543 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
27786b2f | 4544 | if (!pause_p) |
4588ec20 | 4545 | { |
48cf7030 | 4546 | if ((cursor_in_echo_area |
5f5c8ee5 | 4547 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 4548 | show the cursor for the message instead of for the |
5f5c8ee5 | 4549 | (now hidden) mini-buffer contents. */ |
2577053b RS |
4550 | || (EQ (minibuf_window, selected_window) |
4551 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 4552 | && !NILP (echo_area_buffer[0]))) |
2577053b | 4553 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 4554 | the active mini-buffer window. */ |
2577053b | 4555 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 4556 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 4557 | { |
7df02016 | 4558 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
4559 | int row, col; |
4560 | ||
4561 | if (cursor_in_echo_area < 0) | |
4562 | { | |
5f5c8ee5 GM |
4563 | /* Negative value of cursor_in_echo_area means put |
4564 | cursor at beginning of line. */ | |
648fa17d JB |
4565 | row = top; |
4566 | col = 0; | |
4567 | } | |
1113d9db | 4568 | else |
648fa17d | 4569 | { |
5f5c8ee5 GM |
4570 | /* Positive value of cursor_in_echo_area means put |
4571 | cursor at the end of the prompt. If the mini-buffer | |
4572 | is several lines high, find the last line that has | |
4573 | any text on it. */ | |
7df02016 | 4574 | row = FRAME_LINES (f); |
177c0ea7 | 4575 | do |
648fa17d | 4576 | { |
5f5c8ee5 GM |
4577 | --row; |
4578 | col = 0; | |
177c0ea7 | 4579 | |
5f5c8ee5 GM |
4580 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
4581 | { | |
4582 | /* Frame rows are filled up with spaces that | |
4583 | must be ignored here. */ | |
5f5c8ee5 GM |
4584 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
4585 | row); | |
4586 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
4587 | struct glyph *last = start + r->used[TEXT_AREA]; | |
4588 | ||
4589 | while (last > start | |
4590 | && (last - 1)->charpos < 0) | |
4591 | --last; | |
177c0ea7 | 4592 | |
5f5c8ee5 GM |
4593 | col = last - start; |
4594 | } | |
648fa17d JB |
4595 | } |
4596 | while (row > top && col == 0); | |
4597 | ||
6395da5c | 4598 | /* Make sure COL is not out of range. */ |
868e640e | 4599 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 4600 | { |
6395da5c | 4601 | /* If we have another row, advance cursor into it. */ |
7df02016 | 4602 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 4603 | { |
7df02016 | 4604 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
4605 | row++; |
4606 | } | |
4607 | /* Otherwise move it back in range. */ | |
4608 | else | |
868e640e | 4609 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
4610 | } |
4611 | } | |
4612 | ||
385ed61f | 4613 | cursor_to (f, row, col); |
1113d9db | 4614 | } |
4588ec20 | 4615 | else |
5f5c8ee5 GM |
4616 | { |
4617 | /* We have only one cursor on terminal frames. Use it to | |
4618 | display the cursor of the selected window. */ | |
4619 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
4620 | if (w->cursor.vpos >= 0 |
4621 | /* The cursor vpos may be temporarily out of bounds | |
4622 | in the following situation: There is one window, | |
4623 | with the cursor in the lower half of it. The window | |
4624 | is split, and a message causes a redisplay before | |
4625 | a new cursor position has been computed. */ | |
7df02016 | 4626 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
4627 | { |
4628 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
4629 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
4630 | ||
d3d50620 DA |
4631 | if (INTEGERP (w->left_margin_cols)) |
4632 | x += XFASTINT (w->left_margin_cols); | |
177c0ea7 | 4633 | |
7df02016 | 4634 | /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */ |
385ed61f | 4635 | cursor_to (f, y, x); |
5f5c8ee5 GM |
4636 | } |
4637 | } | |
4588ec20 JB |
4638 | } |
4639 | ||
4588ec20 JB |
4640 | do_pause: |
4641 | ||
5f5c8ee5 | 4642 | clear_desired_matrices (f); |
27786b2f | 4643 | return pause_p; |
4588ec20 JB |
4644 | } |
4645 | ||
4588ec20 | 4646 | |
5f5c8ee5 | 4647 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 4648 | |
59ea14cd | 4649 | static bool |
971de7fb | 4650 | scrolling (struct frame *frame) |
4588ec20 JB |
4651 | { |
4652 | int unchanged_at_top, unchanged_at_bottom; | |
4653 | int window_size; | |
4654 | int changed_lines; | |
38182d90 PE |
4655 | int *old_hash = alloca (FRAME_LINES (frame) * sizeof (int)); |
4656 | int *new_hash = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4657 | int *draw_cost = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4658 | int *old_draw_cost = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 4659 | register int i; |
7df02016 | 4660 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
4661 | struct glyph_matrix *current_matrix = frame->current_matrix; |
4662 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 4663 | |
5f5c8ee5 | 4664 | if (!current_matrix) |
1088b922 | 4665 | emacs_abort (); |
4588ec20 | 4666 | |
5f5c8ee5 GM |
4667 | /* Compute hash codes of all the lines. Also calculate number of |
4668 | changed lines, number of unchanged lines at the beginning, and | |
4669 | number of unchanged lines at the end. */ | |
4588ec20 JB |
4670 | changed_lines = 0; |
4671 | unchanged_at_top = 0; | |
7df02016 KS |
4672 | unchanged_at_bottom = FRAME_LINES (frame); |
4673 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
4674 | { |
4675 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 4676 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 4677 | return 0; |
5f5c8ee5 GM |
4678 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
4679 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
4680 | { |
4681 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
4682 | new_hash[i] = old_hash[i]; | |
4683 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
4684 | draw_cost[i] = INFINITY; | |
4685 | } | |
4588ec20 | 4686 | else |
f188b3c4 | 4687 | { |
5f5c8ee5 GM |
4688 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
4689 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 4690 | } |
4588ec20 JB |
4691 | |
4692 | if (old_hash[i] != new_hash[i]) | |
4693 | { | |
4694 | changed_lines++; | |
7df02016 | 4695 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
4696 | } |
4697 | else if (i == unchanged_at_top) | |
4698 | unchanged_at_top++; | |
5f5c8ee5 | 4699 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
4700 | } |
4701 | ||
4702 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
daf01701 | 4703 | if ((!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4704 | && changed_lines < baud_rate / 2400) |
7df02016 | 4705 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
4706 | return 1; |
4707 | ||
7df02016 | 4708 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
4709 | - unchanged_at_bottom); |
4710 | ||
daf01701 | 4711 | if (FRAME_SCROLL_REGION_OK (frame)) |
4588ec20 | 4712 | free_at_end_vpos -= unchanged_at_bottom; |
daf01701 | 4713 | else if (FRAME_MEMORY_BELOW_FRAME (frame)) |
4588ec20 JB |
4714 | free_at_end_vpos = -1; |
4715 | ||
4716 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 4717 | current frame and desired frame, don't bother with i/d calc. */ |
daf01701 | 4718 | if (!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4719 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
4720 | && (window_size >= |
4721 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 4722 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
4723 | old_hash, new_hash, draw_cost))) |
4724 | return 0; | |
4725 | ||
5f5c8ee5 GM |
4726 | if (window_size < 2) |
4727 | return 0; | |
4728 | ||
502b9b64 | 4729 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 4730 | draw_cost + unchanged_at_top - 1, |
190bb91a | 4731 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
4732 | old_hash + unchanged_at_top - 1, |
4733 | new_hash + unchanged_at_top - 1, | |
4734 | free_at_end_vpos - unchanged_at_top); | |
4735 | ||
4736 | return 0; | |
4737 | } | |
4588ec20 | 4738 | |
4588ec20 | 4739 | |
5f5c8ee5 GM |
4740 | /* Count the number of blanks at the start of the vector of glyphs R |
4741 | which is LEN glyphs long. */ | |
4588ec20 | 4742 | |
4588ec20 | 4743 | static int |
971de7fb | 4744 | count_blanks (struct glyph *r, int len) |
4588ec20 | 4745 | { |
5f5c8ee5 | 4746 | int i; |
177c0ea7 | 4747 | |
5f5c8ee5 GM |
4748 | for (i = 0; i < len; ++i) |
4749 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
4750 | break; | |
4751 | ||
4752 | return i; | |
4588ec20 JB |
4753 | } |
4754 | ||
5f5c8ee5 GM |
4755 | |
4756 | /* Count the number of glyphs in common at the start of the glyph | |
4757 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
4758 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
4759 | ||
4588ec20 | 4760 | static int |
971de7fb | 4761 | count_match (struct glyph *str1, struct glyph *end1, struct glyph *str2, struct glyph *end2) |
4588ec20 | 4762 | { |
5f5c8ee5 GM |
4763 | struct glyph *p1 = str1; |
4764 | struct glyph *p2 = str2; | |
177c0ea7 | 4765 | |
5f5c8ee5 GM |
4766 | while (p1 < end1 |
4767 | && p2 < end2 | |
42186983 | 4768 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 4769 | ++p1, ++p2; |
177c0ea7 | 4770 | |
5f5c8ee5 | 4771 | return p1 - str1; |
4588ec20 JB |
4772 | } |
4773 | ||
5f5c8ee5 | 4774 | |
4588ec20 | 4775 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 4776 | |
5e617bc2 | 4777 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS ((f))]) |
4588ec20 | 4778 | |
5f5c8ee5 GM |
4779 | |
4780 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
4781 | ||
4588ec20 | 4782 | static void |
971de7fb | 4783 | update_frame_line (struct frame *f, int vpos) |
4588ec20 | 4784 | { |
5f5c8ee5 | 4785 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
4786 | int tem; |
4787 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
4788 | struct glyph_matrix *current_matrix = f->current_matrix; |
4789 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
4790 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
4791 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
59ea14cd PE |
4792 | bool must_write_whole_line_p; |
4793 | bool write_spaces_p = FRAME_MUST_WRITE_SPACES (f); | |
4794 | bool colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background | |
4795 | != FACE_TTY_DEFAULT_BG_COLOR); | |
0a894bad GM |
4796 | |
4797 | if (colored_spaces_p) | |
4798 | write_spaces_p = 1; | |
5f5c8ee5 | 4799 | |
26c63686 GM |
4800 | /* Current row not enabled means it has unknown contents. We must |
4801 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
4802 | must_write_whole_line_p = !current_row->enabled_p; |
4803 | if (must_write_whole_line_p) | |
4588ec20 | 4804 | { |
5f5c8ee5 | 4805 | obody = 0; |
4588ec20 JB |
4806 | olen = 0; |
4807 | } | |
4808 | else | |
4809 | { | |
5f5c8ee5 GM |
4810 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
4811 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 4812 | |
4cecaab8 MB |
4813 | /* Ignore trailing spaces, if we can. */ |
4814 | if (!write_spaces_p) | |
4815 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
4816 | olen--; | |
4588ec20 JB |
4817 | } |
4818 | ||
5f5c8ee5 GM |
4819 | current_row->enabled_p = 1; |
4820 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 4821 | |
5f5c8ee5 GM |
4822 | /* If desired line is empty, just clear the line. */ |
4823 | if (!desired_row->enabled_p) | |
4588ec20 JB |
4824 | { |
4825 | nlen = 0; | |
4826 | goto just_erase; | |
4827 | } | |
4828 | ||
5f5c8ee5 GM |
4829 | nbody = desired_row->glyphs[TEXT_AREA]; |
4830 | nlen = desired_row->used[TEXT_AREA]; | |
4831 | nend = nbody + nlen; | |
4832 | ||
4833 | /* If display line has unknown contents, write the whole line. */ | |
4834 | if (must_write_whole_line_p) | |
4835 | { | |
26c63686 | 4836 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 4837 | if (!write_spaces_p) |
74ca462f GM |
4838 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
4839 | --nlen; | |
4840 | ||
26c63686 | 4841 | /* Write the contents of the desired line. */ |
74ca462f | 4842 | if (nlen) |
26c63686 | 4843 | { |
385ed61f KL |
4844 | cursor_to (f, vpos, 0); |
4845 | write_glyphs (f, nbody, nlen); | |
26c63686 | 4846 | } |
177c0ea7 | 4847 | |
26c63686 GM |
4848 | /* Don't call clear_end_of_line if we already wrote the whole |
4849 | line. The cursor will not be at the right margin in that | |
4850 | case but in the line below. */ | |
7df02016 | 4851 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 | 4852 | { |
385ed61f KL |
4853 | cursor_to (f, vpos, nlen); |
4854 | clear_end_of_line (f, FRAME_TOTAL_COLS (f)); | |
26c63686 | 4855 | } |
58827478 GM |
4856 | else |
4857 | /* Make sure we are in the right row, otherwise cursor movement | |
4858 | with cmgoto might use `ch' in the wrong row. */ | |
385ed61f | 4859 | cursor_to (f, vpos, 0); |
177c0ea7 | 4860 | |
5f5c8ee5 GM |
4861 | make_current (desired_matrix, current_matrix, vpos); |
4862 | return; | |
4863 | } | |
4588ec20 JB |
4864 | |
4865 | /* Pretend trailing spaces are not there at all, | |
4866 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
4867 | if (!write_spaces_p) |
4868 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
4869 | nlen--; | |
4588ec20 JB |
4870 | |
4871 | /* If there's no i/d char, quickly do the best we can without it. */ | |
daf01701 | 4872 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
4588ec20 | 4873 | { |
5f5c8ee5 | 4874 | int i, j; |
4588ec20 | 4875 | |
5f5c8ee5 GM |
4876 | /* Find the first glyph in desired row that doesn't agree with |
4877 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
4878 | for (i = 0; i < nlen; i++) |
4879 | { | |
5f5c8ee5 | 4880 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 4881 | { |
5f5c8ee5 GM |
4882 | /* Find the end of the run of different glyphs. */ |
4883 | j = i + 1; | |
4884 | while (j < nlen | |
4885 | && (j >= olen | |
4886 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
4887 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
4888 | ++j; | |
177c0ea7 JB |
4889 | |
4890 | /* Output this run of non-matching chars. */ | |
385ed61f KL |
4891 | cursor_to (f, vpos, i); |
4892 | write_glyphs (f, nbody + i, j - i); | |
5f5c8ee5 | 4893 | i = j - 1; |
4588ec20 JB |
4894 | |
4895 | /* Now find the next non-match. */ | |
4896 | } | |
4897 | } | |
4898 | ||
4899 | /* Clear the rest of the line, or the non-clear part of it. */ | |
4900 | if (olen > nlen) | |
4901 | { | |
385ed61f KL |
4902 | cursor_to (f, vpos, nlen); |
4903 | clear_end_of_line (f, olen); | |
4588ec20 JB |
4904 | } |
4905 | ||
5f5c8ee5 GM |
4906 | /* Make current row = desired row. */ |
4907 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
4908 | return; |
4909 | } | |
4910 | ||
5f5c8ee5 GM |
4911 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
4912 | characters in a row. */ | |
4913 | ||
4588ec20 JB |
4914 | if (!olen) |
4915 | { | |
5f5c8ee5 GM |
4916 | /* If current line is blank, skip over initial spaces, if |
4917 | possible, and write the rest. */ | |
4cecaab8 | 4918 | if (write_spaces_p) |
5f5c8ee5 GM |
4919 | nsp = 0; |
4920 | else | |
4921 | nsp = count_blanks (nbody, nlen); | |
4922 | ||
4588ec20 JB |
4923 | if (nlen > nsp) |
4924 | { | |
385ed61f KL |
4925 | cursor_to (f, vpos, nsp); |
4926 | write_glyphs (f, nbody + nsp, nlen - nsp); | |
4588ec20 JB |
4927 | } |
4928 | ||
502b9b64 | 4929 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 4930 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
4931 | return; |
4932 | } | |
4933 | ||
4588ec20 | 4934 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 4935 | osp = count_blanks (obody, olen); |
4cecaab8 | 4936 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 4937 | |
5f5c8ee5 GM |
4938 | /* Compute number of matching chars starting with first non-blank. */ |
4939 | begmatch = count_match (obody + osp, obody + olen, | |
4940 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
4941 | |
4942 | /* Spaces in new match implicit space past the end of old. */ | |
4943 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 4944 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
4945 | { |
4946 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
4947 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
4948 | ++begmatch; | |
4588ec20 JB |
4949 | } |
4950 | ||
4951 | /* Avoid doing insert/delete char | |
4952 | just cause number of leading spaces differs | |
5f5c8ee5 | 4953 | when the following text does not match. */ |
4588ec20 JB |
4954 | if (begmatch == 0 && osp != nsp) |
4955 | osp = nsp = min (osp, nsp); | |
4956 | ||
4957 | /* Find matching characters at end of line */ | |
4958 | op1 = obody + olen; | |
4959 | np1 = nbody + nlen; | |
4960 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
4961 | while (op1 > op2 |
4962 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
4963 | { |
4964 | op1--; | |
4965 | np1--; | |
4966 | } | |
4967 | endmatch = obody + olen - op1; | |
4968 | ||
4588ec20 JB |
4969 | /* tem gets the distance to insert or delete. |
4970 | endmatch is how many characters we save by doing so. | |
4971 | Is it worth it? */ | |
4972 | ||
4973 | tem = (nlen - nsp) - (olen - osp); | |
4974 | if (endmatch && tem | |
daf01701 | 4975 | && (!FRAME_CHAR_INS_DEL_OK (f) |
8a56675d | 4976 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
4977 | endmatch = 0; |
4978 | ||
4979 | /* nsp - osp is the distance to insert or delete. | |
4980 | If that is nonzero, begmatch is known to be nonzero also. | |
4981 | begmatch + endmatch is how much we save by doing the ins/del. | |
4982 | Is it worth it? */ | |
4983 | ||
4984 | if (nsp != osp | |
daf01701 | 4985 | && (!FRAME_CHAR_INS_DEL_OK (f) |
c363a1d6 | 4986 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
4987 | { |
4988 | begmatch = 0; | |
4989 | endmatch = 0; | |
4990 | osp = nsp = min (osp, nsp); | |
4991 | } | |
4992 | ||
4993 | /* Now go through the line, inserting, writing and | |
4994 | deleting as appropriate. */ | |
4995 | ||
4996 | if (osp > nsp) | |
4997 | { | |
385ed61f KL |
4998 | cursor_to (f, vpos, nsp); |
4999 | delete_glyphs (f, osp - nsp); | |
4588ec20 JB |
5000 | } |
5001 | else if (nsp > osp) | |
5002 | { | |
5003 | /* If going to delete chars later in line | |
5004 | and insert earlier in the line, | |
5005 | must delete first to avoid losing data in the insert */ | |
5006 | if (endmatch && nlen < olen + nsp - osp) | |
5007 | { | |
385ed61f KL |
5008 | cursor_to (f, vpos, nlen - endmatch + osp - nsp); |
5009 | delete_glyphs (f, olen + nsp - osp - nlen); | |
4588ec20 JB |
5010 | olen = nlen - (nsp - osp); |
5011 | } | |
385ed61f KL |
5012 | cursor_to (f, vpos, osp); |
5013 | insert_glyphs (f, 0, nsp - osp); | |
4588ec20 JB |
5014 | } |
5015 | olen += nsp - osp; | |
5016 | ||
5017 | tem = nsp + begmatch + endmatch; | |
5018 | if (nlen != tem || olen != tem) | |
5019 | { | |
4588ec20 JB |
5020 | if (!endmatch || nlen == olen) |
5021 | { | |
c363a1d6 GM |
5022 | /* If new text being written reaches right margin, there is |
5023 | no need to do clear-to-eol at the end of this function | |
5024 | (and it would not be safe, since cursor is not going to | |
5025 | be "at the margin" after the text is done). */ | |
7df02016 | 5026 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 5027 | olen = 0; |
c363a1d6 GM |
5028 | |
5029 | /* Function write_glyphs is prepared to do nothing | |
5030 | if passed a length <= 0. Check it here to avoid | |
5031 | unnecessary cursor movement. */ | |
5032 | if (nlen - tem > 0) | |
5033 | { | |
385ed61f KL |
5034 | cursor_to (f, vpos, nsp + begmatch); |
5035 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
c363a1d6 | 5036 | } |
4588ec20 JB |
5037 | } |
5038 | else if (nlen > olen) | |
5039 | { | |
24e86043 KH |
5040 | /* Here, we used to have the following simple code: |
5041 | ---------------------------------------- | |
5042 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
5043 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
5044 | ---------------------------------------- | |
5045 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
5046 | is a padding glyph. */ | |
5047 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
5048 | int del; | |
5f5c8ee5 | 5049 | |
385ed61f | 5050 | cursor_to (f, vpos, nsp + begmatch); |
177c0ea7 | 5051 | |
5f5c8ee5 | 5052 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
5053 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
5054 | out--; | |
385ed61f | 5055 | write_glyphs (f, nbody + nsp + begmatch, out); |
177c0ea7 | 5056 | |
5f5c8ee5 GM |
5057 | /* If we left columns to be overwritten, we must delete them. */ |
5058 | del = olen - tem - out; | |
c363a1d6 | 5059 | if (del > 0) |
385ed61f | 5060 | delete_glyphs (f, del); |
177c0ea7 | 5061 | |
5f5c8ee5 | 5062 | /* At last, we insert columns not yet written out. */ |
385ed61f | 5063 | insert_glyphs (f, nbody + nsp + begmatch + out, nlen - olen + del); |
5f5c8ee5 GM |
5064 | olen = nlen; |
5065 | } | |
5066 | else if (olen > nlen) | |
5067 | { | |
385ed61f KL |
5068 | cursor_to (f, vpos, nsp + begmatch); |
5069 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
5070 | delete_glyphs (f, olen - nlen); | |
5f5c8ee5 GM |
5071 | olen = nlen; |
5072 | } | |
bd9e3e75 | 5073 | } |
5f5c8ee5 GM |
5074 | |
5075 | just_erase: | |
5076 | /* If any unerased characters remain after the new line, erase them. */ | |
5077 | if (olen > nlen) | |
078b3696 | 5078 | { |
385ed61f KL |
5079 | cursor_to (f, vpos, nlen); |
5080 | clear_end_of_line (f, olen); | |
078b3696 | 5081 | } |
5f5c8ee5 GM |
5082 | |
5083 | /* Exchange contents between current_frame and new_frame. */ | |
5084 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5085 | } |
5f5c8ee5 GM |
5086 | |
5087 | ||
078b3696 | 5088 | \f |
5f5c8ee5 GM |
5089 | /*********************************************************************** |
5090 | X/Y Position -> Buffer Position | |
5091 | ***********************************************************************/ | |
5092 | ||
a1b0a6db | 5093 | /* Determine what's under window-relative pixel position (*X, *Y). |
2396cbba | 5094 | Return the OBJECT (string or buffer) that's there. |
6b61353c | 5095 | Return in *POS the position in that object. |
2396cbba EZ |
5096 | Adjust *X and *Y to character positions. |
5097 | Return in *DX and *DY the pixel coordinates of the click, | |
5098 | relative to the top left corner of OBJECT, or relative to | |
5099 | the top left corner of the character glyph at (*X, *Y) | |
5100 | if OBJECT is nil. | |
5101 | Return WIDTH and HEIGHT of the object at (*X, *Y), or zero | |
5102 | if the coordinates point to an empty area of the display. */ | |
5f5c8ee5 | 5103 | |
6b61353c | 5104 | Lisp_Object |
971de7fb | 5105 | 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 | 5106 | { |
5f5c8ee5 | 5107 | struct it it; |
707ea971 | 5108 | Lisp_Object old_current_buffer = Fcurrent_buffer (); |
5f5c8ee5 | 5109 | struct text_pos startp; |
6b61353c KH |
5110 | Lisp_Object string; |
5111 | struct glyph_row *row; | |
cedd7cd9 KS |
5112 | #ifdef HAVE_WINDOW_SYSTEM |
5113 | struct image *img = 0; | |
5114 | #endif | |
2396cbba | 5115 | int x0, x1, to_x; |
57b3e30b | 5116 | void *itdata = NULL; |
5f5c8ee5 | 5117 | |
707ea971 CY |
5118 | /* We used to set current_buffer directly here, but that does the |
5119 | wrong thing with `face-remapping-alist' (bug#2044). */ | |
d3d50620 | 5120 | Fset_buffer (w->buffer); |
57b3e30b | 5121 | itdata = bidi_shelve_cache (); |
d3d50620 | 5122 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
5f5c8ee5 GM |
5123 | CHARPOS (startp) = min (ZV, max (BEGV, CHARPOS (startp))); |
5124 | BYTEPOS (startp) = min (ZV_BYTE, max (BEGV_BYTE, BYTEPOS (startp))); | |
5125 | start_display (&it, w, startp); | |
352ec8ff EZ |
5126 | /* start_display takes into account the header-line row, but IT's |
5127 | vpos still counts from the glyph row that includes the window's | |
5128 | start position. Adjust for a possible header-line row. */ | |
59ea14cd | 5129 | it.vpos += WINDOW_WANTS_HEADER_LINE_P (w); |
177c0ea7 | 5130 | |
9173a8fb | 5131 | x0 = *x; |
2396cbba EZ |
5132 | |
5133 | /* First, move to the beginning of the row corresponding to *Y. We | |
5134 | need to be in that row to get the correct value of base paragraph | |
40629f17 | 5135 | direction for the text at (*X, *Y). */ |
2396cbba EZ |
5136 | move_it_to (&it, -1, 0, *y, -1, MOVE_TO_X | MOVE_TO_Y); |
5137 | ||
5138 | /* TO_X is the pixel position that the iterator will compute for the | |
40629f17 EZ |
5139 | glyph at *X. We add it.first_visible_x because iterator |
5140 | positions include the hscroll. */ | |
2396cbba EZ |
5141 | to_x = x0 + it.first_visible_x; |
5142 | if (it.bidi_it.paragraph_dir == R2L) | |
5143 | /* For lines in an R2L paragraph, we need to mirror TO_X wrt the | |
5144 | text area. This is because the iterator, even in R2L | |
5145 | paragraphs, delivers glyphs as if they started at the left | |
5146 | margin of the window. (When we actually produce glyphs for | |
5147 | display, we reverse their order in PRODUCE_GLYPHS, but the | |
5148 | iterator doesn't know about that.) The following line adjusts | |
5149 | the pixel position to the iterator geometry, which is what | |
40629f17 EZ |
5150 | move_it_* routines use. (The -1 is because in a window whose |
5151 | text-area width is W, the rightmost pixel position is W-1, and | |
5152 | it should be mirrored into zero pixel position.) */ | |
5153 | to_x = window_box_width (w, TEXT_AREA) - to_x - 1; | |
5154 | ||
5155 | /* Now move horizontally in the row to the glyph under *X. Second | |
5156 | argument is ZV to prevent move_it_in_display_line from matching | |
5157 | based on buffer positions. */ | |
2396cbba | 5158 | move_it_in_display_line (&it, ZV, to_x, MOVE_TO_X); |
35928349 | 5159 | bidi_unshelve_cache (itdata, 0); |
177c0ea7 | 5160 | |
707ea971 | 5161 | Fset_buffer (old_current_buffer); |
a1b0a6db | 5162 | |
6b61353c KH |
5163 | *dx = x0 + it.first_visible_x - it.current_x; |
5164 | *dy = *y - it.current_y; | |
5165 | ||
d3d50620 | 5166 | string = w->buffer; |
6b61353c KH |
5167 | if (STRINGP (it.string)) |
5168 | string = it.string; | |
a1b0a6db | 5169 | *pos = it.current; |
86282aab KH |
5170 | if (it.what == IT_COMPOSITION |
5171 | && it.cmp_it.nchars > 1 | |
5172 | && it.cmp_it.reversed_p) | |
5173 | { | |
5174 | /* The current display element is a grapheme cluster in a | |
5175 | composition. In that case, we need the position of the first | |
5176 | character of the cluster. But, as it.cmp_it.reversed_p is 1, | |
5177 | it.current points to the last character of the cluster, thus | |
5178 | we must move back to the first character of the same | |
5179 | cluster. */ | |
5180 | CHARPOS (pos->pos) -= it.cmp_it.nchars - 1; | |
5181 | if (STRINGP (it.string)) | |
5182 | BYTEPOS (pos->pos) = string_char_to_byte (string, CHARPOS (pos->pos)); | |
5183 | else | |
d3d50620 | 5184 | BYTEPOS (pos->pos) = buf_charpos_to_bytepos (XBUFFER (w->buffer), |
425cc014 | 5185 | CHARPOS (pos->pos)); |
86282aab | 5186 | } |
6b61353c KH |
5187 | |
5188 | #ifdef HAVE_WINDOW_SYSTEM | |
5189 | if (it.what == IT_IMAGE) | |
5190 | { | |
6b61353c KH |
5191 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5192 | && !NILP (img->spec)) | |
5193 | *object = img->spec; | |
5194 | } | |
5195 | #endif | |
5196 | ||
b70d98e1 KS |
5197 | if (it.vpos < w->current_matrix->nrows |
5198 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5199 | row->enabled_p)) | |
6b61353c KH |
5200 | { |
5201 | if (it.hpos < row->used[TEXT_AREA]) | |
5202 | { | |
5203 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6b61353c | 5204 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5205 | if (img) |
5206 | { | |
5207 | *dy -= row->ascent - glyph->ascent; | |
4be9765d KH |
5208 | *dx += glyph->slice.img.x; |
5209 | *dy += glyph->slice.img.y; | |
cedd7cd9 KS |
5210 | /* Image slices positions are still relative to the entire image */ |
5211 | *width = img->width; | |
5212 | *height = img->height; | |
5213 | } | |
5214 | else | |
6b61353c | 5215 | #endif |
cedd7cd9 KS |
5216 | { |
5217 | *width = glyph->pixel_width; | |
5218 | *height = glyph->ascent + glyph->descent; | |
5219 | } | |
6b61353c KH |
5220 | } |
5221 | else | |
5222 | { | |
5223 | *width = 0; | |
5224 | *height = row->height; | |
5225 | } | |
5226 | } | |
5227 | else | |
5228 | { | |
5229 | *width = *height = 0; | |
5230 | } | |
5231 | ||
5232 | /* Add extra (default width) columns if clicked after EOL. */ | |
5e617bc2 | 5233 | x1 = max (0, it.current_x + it.pixel_width - it.first_visible_x); |
6b61353c KH |
5234 | if (x0 > x1) |
5235 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5236 | ||
5237 | *x = it.hpos; | |
5238 | *y = it.vpos; | |
5239 | ||
5240 | return string; | |
5f5c8ee5 | 5241 | } |
4588ec20 | 5242 | |
5f5c8ee5 GM |
5243 | |
5244 | /* Value is the string under window-relative coordinates X/Y in the | |
6b61353c KH |
5245 | mode line or header line (PART says which) of window W, or nil if none. |
5246 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
5247 | |
5248 | Lisp_Object | |
ace1712c | 5249 | mode_line_string (struct window *w, enum window_part part, |
d311d28c | 5250 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5251 | int *dx, int *dy, int *width, int *height) |
5f5c8ee5 GM |
5252 | { |
5253 | struct glyph_row *row; | |
5254 | struct glyph *glyph, *end; | |
6b61353c | 5255 | int x0, y0; |
5f5c8ee5 GM |
5256 | Lisp_Object string = Qnil; |
5257 | ||
641bdbf3 | 5258 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
5259 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
5260 | else | |
045dee35 | 5261 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
6b61353c KH |
5262 | y0 = *y - row->y; |
5263 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
5f5c8ee5 GM |
5264 | |
5265 | if (row->mode_line_p && row->enabled_p) | |
4588ec20 | 5266 | { |
5f5c8ee5 GM |
5267 | /* Find the glyph under X. If we find one with a string object, |
5268 | it's the one we were looking for. */ | |
5269 | glyph = row->glyphs[TEXT_AREA]; | |
5270 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 5271 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5272 | x0 -= glyph->pixel_width; |
5273 | *x = glyph - row->glyphs[TEXT_AREA]; | |
5274 | if (glyph < end) | |
5275 | { | |
5276 | string = glyph->object; | |
5277 | *charpos = glyph->charpos; | |
5278 | *width = glyph->pixel_width; | |
5279 | *height = glyph->ascent + glyph->descent; | |
5280 | #ifdef HAVE_WINDOW_SYSTEM | |
5281 | if (glyph->type == IMAGE_GLYPH) | |
5282 | { | |
5283 | struct image *img; | |
5284 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5285 | if (img != NULL) | |
5286 | *object = img->spec; | |
5287 | y0 -= row->ascent - glyph->ascent; | |
5288 | } | |
5289 | #endif | |
5290 | } | |
5291 | else | |
5292 | { | |
5293 | /* Add extra (default width) columns if clicked after EOL. */ | |
5294 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5295 | *width = 0; | |
5296 | *height = row->height; | |
5297 | } | |
5298 | } | |
5299 | else | |
5300 | { | |
5301 | *x = 0; | |
5302 | x0 = 0; | |
5303 | *width = *height = 0; | |
4588ec20 | 5304 | } |
5f5c8ee5 | 5305 | |
6b61353c KH |
5306 | *dx = x0; |
5307 | *dy = y0; | |
5308 | ||
5f5c8ee5 | 5309 | return string; |
4588ec20 | 5310 | } |
5f5c8ee5 GM |
5311 | |
5312 | ||
db1db309 GM |
5313 | /* Value is the string under window-relative coordinates X/Y in either |
5314 | marginal area, or nil if none. *CHARPOS is set to the position in | |
5315 | the string returned. */ | |
5316 | ||
5317 | Lisp_Object | |
ace1712c | 5318 | marginal_area_string (struct window *w, enum window_part part, |
d311d28c | 5319 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5320 | int *dx, int *dy, int *width, int *height) |
db1db309 GM |
5321 | { |
5322 | struct glyph_row *row = w->current_matrix->rows; | |
5323 | struct glyph *glyph, *end; | |
6b61353c | 5324 | int x0, y0, i, wy = *y; |
641bdbf3 | 5325 | int area; |
db1db309 GM |
5326 | Lisp_Object string = Qnil; |
5327 | ||
641bdbf3 | 5328 | if (part == ON_LEFT_MARGIN) |
db1db309 | 5329 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 5330 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
5331 | area = RIGHT_MARGIN_AREA; |
5332 | else | |
1088b922 | 5333 | emacs_abort (); |
db1db309 GM |
5334 | |
5335 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
5336 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
5337 | break; | |
6b61353c KH |
5338 | y0 = *y - row->y; |
5339 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
db1db309 GM |
5340 | |
5341 | if (row->enabled_p) | |
5342 | { | |
5343 | /* Find the glyph under X. If we find one with a string object, | |
5344 | it's the one we were looking for. */ | |
db1db309 | 5345 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 5346 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5347 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5348 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) |
5349 | + window_box_width (w, LEFT_MARGIN_AREA) | |
5350 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 5351 | else |
7df02016 | 5352 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5353 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5354 | : 0); |
5355 | ||
6b61353c KH |
5356 | glyph = row->glyphs[area]; |
5357 | end = glyph + row->used[area]; | |
cfde341f | 5358 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5359 | x0 -= glyph->pixel_width; |
5360 | *x = glyph - row->glyphs[area]; | |
5361 | if (glyph < end) | |
5362 | { | |
5363 | string = glyph->object; | |
5364 | *charpos = glyph->charpos; | |
5365 | *width = glyph->pixel_width; | |
5366 | *height = glyph->ascent + glyph->descent; | |
5367 | #ifdef HAVE_WINDOW_SYSTEM | |
5368 | if (glyph->type == IMAGE_GLYPH) | |
5369 | { | |
5370 | struct image *img; | |
5371 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5372 | if (img != NULL) | |
5373 | *object = img->spec; | |
5374 | y0 -= row->ascent - glyph->ascent; | |
4be9765d KH |
5375 | x0 += glyph->slice.img.x; |
5376 | y0 += glyph->slice.img.y; | |
6b61353c KH |
5377 | } |
5378 | #endif | |
5379 | } | |
5380 | else | |
5381 | { | |
5382 | /* Add extra (default width) columns if clicked after EOL. */ | |
5383 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5384 | *width = 0; | |
5385 | *height = row->height; | |
5386 | } | |
db1db309 | 5387 | } |
6b61353c KH |
5388 | else |
5389 | { | |
5390 | x0 = 0; | |
5391 | *x = 0; | |
5392 | *width = *height = 0; | |
5393 | } | |
5394 | ||
5395 | *dx = x0; | |
5396 | *dy = y0; | |
db1db309 GM |
5397 | |
5398 | return string; | |
5399 | } | |
5400 | ||
5401 | ||
5f5c8ee5 GM |
5402 | /*********************************************************************** |
5403 | Changing Frame Sizes | |
5404 | ***********************************************************************/ | |
4588ec20 JB |
5405 | |
5406 | #ifdef SIGWINCH | |
5f5c8ee5 | 5407 | |
20ef56db PE |
5408 | static void deliver_window_change_signal (int); |
5409 | ||
9af30bdf | 5410 | static void |
20ef56db | 5411 | handle_window_change_signal (int sig) |
4588ec20 JB |
5412 | { |
5413 | int width, height; | |
28d7d09f | 5414 | struct tty_display_info *tty; |
4d553a13 | 5415 | |
9628b887 KL |
5416 | /* The frame size change obviously applies to a single |
5417 | termcap-controlled terminal, but we can't decide which. | |
5418 | Therefore, we resize the frames corresponding to each tty. | |
9628b887 KL |
5419 | */ |
5420 | for (tty = tty_list; tty; tty = tty->next) { | |
4588ec20 | 5421 | |
0a125897 KL |
5422 | if (! tty->term_initted) |
5423 | continue; | |
4588ec20 | 5424 | |
db878925 DN |
5425 | /* Suspended tty frames have tty->input == NULL avoid trying to |
5426 | use it. */ | |
5427 | if (!tty->input) | |
5428 | continue; | |
5429 | ||
0b0d3e0b | 5430 | get_tty_size (fileno (tty->input), &width, &height); |
3fc809e2 | 5431 | |
bedeffcf | 5432 | if (width > 5 && height > 2) { |
9628b887 | 5433 | Lisp_Object tail, frame; |
3fc809e2 | 5434 | |
9628b887 | 5435 | FOR_EACH_FRAME (tail, frame) |
4d553a13 KL |
5436 | if (FRAME_TERMCAP_P (XFRAME (frame)) && FRAME_TTY (XFRAME (frame)) == tty) |
5437 | /* Record the new sizes, but don't reallocate the data | |
5438 | structures now. Let that be done later outside of the | |
5439 | signal handler. */ | |
5440 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); | |
9628b887 | 5441 | } |
4588ec20 | 5442 | } |
20ef56db | 5443 | } |
3fc809e2 | 5444 | |
20ef56db PE |
5445 | static void |
5446 | deliver_window_change_signal (int sig) | |
5447 | { | |
4d7e6e51 | 5448 | deliver_process_signal (sig, handle_window_change_signal); |
4588ec20 JB |
5449 | } |
5450 | #endif /* SIGWINCH */ | |
5451 | ||
5452 | ||
59ea14cd PE |
5453 | /* Do any change in frame size that was requested by a signal. |
5454 | SAFE means this function is called from a place where it is | |
5455 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 5456 | |
dfcf069d | 5457 | void |
59ea14cd | 5458 | do_pending_window_change (bool safe) |
4588ec20 | 5459 | { |
20ef56db | 5460 | /* If window change signal handler should have run before, run it now. */ |
b96fd3e8 GM |
5461 | if (redisplaying_p && !safe) |
5462 | return; | |
177c0ea7 | 5463 | |
4588ec20 JB |
5464 | while (delayed_size_change) |
5465 | { | |
35f56f96 | 5466 | Lisp_Object tail, frame; |
4588ec20 JB |
5467 | |
5468 | delayed_size_change = 0; | |
5469 | ||
35f56f96 | 5470 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5471 | { |
5f5c8ee5 | 5472 | struct frame *f = XFRAME (frame); |
35f56f96 | 5473 | |
7df02016 KS |
5474 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
5475 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
5476 | 0, 0, safe); | |
4588ec20 JB |
5477 | } |
5478 | } | |
5479 | } | |
5480 | ||
5481 | ||
502b9b64 | 5482 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 5483 | indicate no change is to take place. |
4588ec20 | 5484 | |
59ea14cd PE |
5485 | If DELAY, assume we're being called from a signal handler, and |
5486 | queue the change for later - perhaps the next redisplay. | |
5487 | Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
5488 | from a signal handler. |
5489 | ||
59ea14cd | 5490 | SAFE means this function is called from a place where it's |
b96fd3e8 | 5491 | safe to change frame sizes while a redisplay is in progress. */ |
b6a65ac2 | 5492 | |
dfcf069d | 5493 | void |
59ea14cd PE |
5494 | change_frame_size (struct frame *f, int newheight, int newwidth, |
5495 | bool pretend, bool delay, bool safe) | |
45140e01 RS |
5496 | { |
5497 | Lisp_Object tail, frame; | |
3826ea1a | 5498 | |
9628b887 | 5499 | if (FRAME_MSDOS_P (f)) |
45140e01 | 5500 | { |
9628b887 KL |
5501 | /* On MS-DOS, all frames use the same screen, so a change in |
5502 | size affects all frames. Termcap now supports multiple | |
5503 | ttys. */ | |
45140e01 | 5504 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 5505 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 5506 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 5507 | pretend, delay, safe); |
45140e01 RS |
5508 | } |
5509 | else | |
b96fd3e8 | 5510 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
5511 | } |
5512 | ||
5513 | static void | |
59ea14cd PE |
5514 | change_frame_size_1 (struct frame *f, int newheight, int newwidth, |
5515 | bool pretend, bool delay, bool safe) | |
4588ec20 | 5516 | { |
7df02016 | 5517 | int new_frame_total_cols; |
d311d28c | 5518 | ptrdiff_t count = SPECPDL_INDEX (); |
3826ea1a | 5519 | |
4588ec20 | 5520 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 5521 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 5522 | { |
7df02016 KS |
5523 | f->new_text_lines = newheight; |
5524 | f->new_text_cols = newwidth; | |
4588ec20 JB |
5525 | delayed_size_change = 1; |
5526 | return; | |
5527 | } | |
5528 | ||
502b9b64 | 5529 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
5530 | f->new_text_lines = 0; |
5531 | f->new_text_cols = 0; | |
b6a65ac2 | 5532 | |
08f7aa3e | 5533 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 5534 | if (newheight == 0) |
7df02016 | 5535 | newheight = FRAME_LINES (f); |
ae19c6f2 | 5536 | if (newwidth == 0) |
7df02016 | 5537 | newwidth = FRAME_COLS (f); |
3826ea1a | 5538 | |
3b95a6f9 | 5539 | /* Compute width of windows in F. */ |
b6a65ac2 | 5540 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 5541 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 | 5542 | |
3b95a6f9 MR |
5543 | /* This is the width of the frame with vertical scroll bars and fringe |
5544 | columns. Do this after rounding - see discussion of bug#9723. */ | |
5545 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); | |
5546 | ||
b6a65ac2 | 5547 | /* If we're not changing the frame size, quit now. */ |
3b95a6f9 MR |
5548 | /* Frame width may be unchanged but the text portion may change, for |
5549 | example, fullscreen and remove/add scroll bar. */ | |
7df02016 | 5550 | if (newheight == FRAME_LINES (f) |
3b95a6f9 MR |
5551 | /* Text portion unchanged? */ |
5552 | && newwidth == FRAME_COLS (f) | |
5553 | /* Frame width unchanged? */ | |
5554 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) | |
4588ec20 JB |
5555 | return; |
5556 | ||
4d7e6e51 | 5557 | block_input (); |
cbb95688 | 5558 | |
886a8a6c KH |
5559 | #ifdef MSDOS |
5560 | /* We only can set screen dimensions to certain values supported | |
5561 | by our video hardware. Try to find the smallest size greater | |
5562 | or equal to the requested dimensions. */ | |
5563 | dos_set_window_size (&newheight, &newwidth); | |
5564 | #endif | |
5565 | ||
7df02016 | 5566 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 5567 | { |
562dd5e9 | 5568 | resize_frame_windows (f, newheight, 0); |
b6a65ac2 | 5569 | |
48e482e6 EZ |
5570 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5571 | manipulating video hardware. */ | |
5572 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5573 | FrameRows (FRAME_TTY (f)) = newheight; |
4588ec20 JB |
5574 | } |
5575 | ||
7df02016 | 5576 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 5577 | { |
562dd5e9 | 5578 | resize_frame_windows (f, new_frame_total_cols, 1); |
4588ec20 | 5579 | |
48e482e6 EZ |
5580 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5581 | manipulating video hardware. */ | |
5582 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5583 | FrameCols (FRAME_TTY (f)) = newwidth; |
5f5c8ee5 | 5584 | |
e69b0960 | 5585 | if (WINDOWP (f->tool_bar_window)) |
e8c17b81 | 5586 | wset_total_cols (XWINDOW (f->tool_bar_window), make_number (newwidth)); |
4588ec20 JB |
5587 | } |
5588 | ||
7df02016 KS |
5589 | FRAME_LINES (f) = newheight; |
5590 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 5591 | |
5f5c8ee5 GM |
5592 | { |
5593 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
5594 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 5595 | |
5f5c8ee5 GM |
5596 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
5597 | &text_area_height); | |
5598 | if (w->cursor.x >= text_area_x + text_area_width) | |
5599 | w->cursor.hpos = w->cursor.x = 0; | |
5600 | if (w->cursor.y >= text_area_y + text_area_height) | |
5601 | w->cursor.vpos = w->cursor.y = 0; | |
5602 | } | |
986e61b8 | 5603 | |
5f5c8ee5 | 5604 | adjust_glyphs (f); |
5f5c8ee5 | 5605 | calculate_costs (f); |
cb02fa39 GM |
5606 | SET_FRAME_GARBAGED (f); |
5607 | f->resized_p = 1; | |
97cf50e7 | 5608 | |
4d7e6e51 | 5609 | unblock_input (); |
61730a69 | 5610 | |
66322887 | 5611 | record_unwind_current_buffer (); |
e523f7e5 | 5612 | |
ef264c42 | 5613 | run_window_configuration_change_hook (f); |
e523f7e5 RS |
5614 | |
5615 | unbind_to (count, Qnil); | |
4588ec20 | 5616 | } |
5f5c8ee5 GM |
5617 | |
5618 | ||
4588ec20 | 5619 | \f |
5f5c8ee5 GM |
5620 | /*********************************************************************** |
5621 | Terminal Related Lisp Functions | |
5622 | ***********************************************************************/ | |
5623 | ||
5624 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 5625 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
5626 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
5627 | FILE = nil means just close any termscript file currently open. */) | |
5842a27b | 5628 | (Lisp_Object file) |
5f5c8ee5 | 5629 | { |
0b0d3e0b KL |
5630 | struct tty_display_info *tty; |
5631 | ||
7d2f1216 EZ |
5632 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ()) |
5633 | && ! FRAME_MSDOS_P (SELECTED_FRAME ())) | |
0b0d3e0b KL |
5634 | error ("Current frame is not on a tty device"); |
5635 | ||
5636 | tty = CURTTY (); | |
5637 | ||
5638 | if (tty->termscript != 0) | |
e18c7093 | 5639 | { |
4d7e6e51 | 5640 | block_input (); |
0b0d3e0b | 5641 | fclose (tty->termscript); |
4d7e6e51 | 5642 | unblock_input (); |
e18c7093 | 5643 | } |
0b0d3e0b | 5644 | tty->termscript = 0; |
5f5c8ee5 GM |
5645 | |
5646 | if (! NILP (file)) | |
5647 | { | |
5648 | file = Fexpand_file_name (file, Qnil); | |
42a5b22f | 5649 | tty->termscript = fopen (SSDATA (file), "w"); |
0b0d3e0b | 5650 | if (tty->termscript == 0) |
5f5c8ee5 GM |
5651 | report_file_error ("Opening termscript", Fcons (file, Qnil)); |
5652 | } | |
5653 | return Qnil; | |
5654 | } | |
5655 | ||
5656 | ||
4588ec20 | 5657 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
62af879c | 5658 | Ssend_string_to_terminal, 1, 2, 0, |
7ee72033 | 5659 | doc: /* Send STRING to the terminal without alteration. |
62af879c KL |
5660 | Control characters in STRING will have terminal-dependent effects. |
5661 | ||
6ed8eeff | 5662 | Optional parameter TERMINAL specifies the tty terminal device to use. |
558759e4 AM |
5663 | It may be a terminal object, a frame, or nil for the terminal used by |
5664 | the currently selected frame. In batch mode, STRING is sent to stdout | |
5665 | when TERMINAL is nil. */) | |
5842a27b | 5666 | (Lisp_Object string, Lisp_Object terminal) |
4588ec20 | 5667 | { |
7cef7ce3 SM |
5668 | struct terminal *t = get_terminal (terminal, 1); |
5669 | FILE *out; | |
0b0d3e0b | 5670 | |
94f3db62 | 5671 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 5672 | CHECK_STRING (string); |
4d7e6e51 | 5673 | block_input (); |
0b0d3e0b | 5674 | |
6ed8eeff KL |
5675 | if (!t) |
5676 | error ("Unknown terminal device"); | |
0b0d3e0b | 5677 | |
7cef7ce3 SM |
5678 | if (t->type == output_initial) |
5679 | out = stdout; | |
5680 | else if (t->type != output_termcap && t->type != output_msdos_raw) | |
5681 | error ("Device %d is not a termcap terminal device", t->id); | |
5682 | else | |
5683 | { | |
5684 | struct tty_display_info *tty = t->display_info.tty; | |
3fc809e2 | 5685 | |
7cef7ce3 SM |
5686 | if (! tty->output) |
5687 | error ("Terminal is currently suspended"); | |
cecfdea6 | 5688 | |
7cef7ce3 SM |
5689 | if (tty->termscript) |
5690 | { | |
5691 | fwrite (SDATA (string), 1, SBYTES (string), tty->termscript); | |
5692 | fflush (tty->termscript); | |
5693 | } | |
5694 | out = tty->output; | |
4588ec20 | 5695 | } |
7cef7ce3 SM |
5696 | fwrite (SDATA (string), 1, SBYTES (string), out); |
5697 | fflush (out); | |
4d7e6e51 | 5698 | unblock_input (); |
4588ec20 JB |
5699 | return Qnil; |
5700 | } | |
5701 | ||
5f5c8ee5 | 5702 | |
a7ca3326 | 5703 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 5704 | doc: /* Beep, or flash the screen. |
228299fa | 5705 | Also, unless an argument is given, |
7ee72033 | 5706 | terminate any keyboard macro currently executing. */) |
5842a27b | 5707 | (Lisp_Object arg) |
4588ec20 | 5708 | { |
efb859b4 | 5709 | if (!NILP (arg)) |
4588ec20 | 5710 | { |
7fa788da RS |
5711 | if (noninteractive) |
5712 | putchar (07); | |
5713 | else | |
385ed61f | 5714 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5715 | } |
5716 | else | |
5717 | bitch_at_user (); | |
5718 | ||
5719 | return Qnil; | |
5720 | } | |
5721 | ||
dfcf069d | 5722 | void |
971de7fb | 5723 | bitch_at_user (void) |
4588ec20 JB |
5724 | { |
5725 | if (noninteractive) | |
5726 | putchar (07); | |
5f5c8ee5 | 5727 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
4588ec20 JB |
5728 | error ("Keyboard macro terminated by a command ringing the bell"); |
5729 | else | |
385ed61f | 5730 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5731 | } |
5732 | ||
5f5c8ee5 GM |
5733 | |
5734 | \f | |
5735 | /*********************************************************************** | |
5736 | Sleeping, Waiting | |
5737 | ***********************************************************************/ | |
5738 | ||
a7ca3326 | 5739 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 5740 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
5741 | SECONDS may be a floating-point value, meaning that you can wait for a |
5742 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
d35af63c | 5743 | additional wait period, in milliseconds; this is for backwards compatibility. |
7ee72033 | 5744 | \(Not all operating systems support waiting for a fraction of a second.) */) |
5842a27b | 5745 | (Lisp_Object seconds, Lisp_Object milliseconds) |
4588ec20 | 5746 | { |
d311d28c | 5747 | double duration = extract_float (seconds); |
4588ec20 | 5748 | |
d311d28c PE |
5749 | if (!NILP (milliseconds)) |
5750 | { | |
5751 | CHECK_NUMBER (milliseconds); | |
5752 | duration += XINT (milliseconds) / 1000.0; | |
5753 | } | |
b07646f5 | 5754 | |
d35af63c PE |
5755 | if (0 < duration) |
5756 | { | |
5757 | EMACS_TIME t = EMACS_TIME_FROM_DOUBLE (duration); | |
f1dd8073 | 5758 | wait_reading_process_output (min (EMACS_SECS (t), WAIT_READING_MAX), |
d35af63c PE |
5759 | EMACS_NSECS (t), 0, 0, Qnil, NULL, 0); |
5760 | } | |
4588ec20 JB |
5761 | |
5762 | return Qnil; | |
5763 | } | |
5764 | ||
5f5c8ee5 | 5765 | |
dcd1ca45 | 5766 | /* This is just like wait_reading_process_output, except that |
902b9b6d | 5767 | it does redisplay. |
f76475ad | 5768 | |
2bcac766 CY |
5769 | TIMEOUT is number of seconds to wait (float or integer), |
5770 | or t to wait forever. | |
59ea14cd | 5771 | READING is true if reading input. |
9fa1de30 PE |
5772 | If DISPLAY_OPTION is >0 display process output while waiting. |
5773 | If DISPLAY_OPTION is >1 perform an initial redisplay before waiting. | |
902b9b6d | 5774 | */ |
4588ec20 | 5775 | |
f76475ad | 5776 | Lisp_Object |
9fa1de30 | 5777 | sit_for (Lisp_Object timeout, bool reading, int display_option) |
f76475ad | 5778 | { |
d35af63c PE |
5779 | intmax_t sec; |
5780 | int nsec; | |
9fa1de30 | 5781 | bool do_display = display_option > 0; |
f222369e | 5782 | |
902b9b6d | 5783 | swallow_events (do_display); |
ccddf474 | 5784 | |
902b9b6d | 5785 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 5786 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 5787 | return Qnil; |
4588ec20 | 5788 | |
9fa1de30 | 5789 | if (display_option > 1) |
902b9b6d KS |
5790 | redisplay_preserve_echo_area (2); |
5791 | ||
d35af63c | 5792 | if (INTEGERP (timeout)) |
2bcac766 | 5793 | { |
d35af63c PE |
5794 | sec = XINT (timeout); |
5795 | if (! (0 < sec)) | |
5796 | return Qt; | |
5797 | nsec = 0; | |
2bcac766 | 5798 | } |
d35af63c | 5799 | else if (FLOATP (timeout)) |
d311d28c | 5800 | { |
d35af63c PE |
5801 | double seconds = XFLOAT_DATA (timeout); |
5802 | if (! (0 < seconds)) | |
d311d28c | 5803 | return Qt; |
d35af63c PE |
5804 | else |
5805 | { | |
5806 | EMACS_TIME t = EMACS_TIME_FROM_DOUBLE (seconds); | |
f1dd8073 | 5807 | sec = min (EMACS_SECS (t), WAIT_READING_MAX); |
d35af63c PE |
5808 | nsec = EMACS_NSECS (t); |
5809 | } | |
5810 | } | |
5811 | else if (EQ (timeout, Qt)) | |
5812 | { | |
5813 | sec = 0; | |
5814 | nsec = 0; | |
d311d28c | 5815 | } |
d35af63c PE |
5816 | else |
5817 | wrong_type_argument (Qnumberp, timeout); | |
5818 | ||
dfdb645c | 5819 | |
4a4bbad2 | 5820 | #ifdef USABLE_SIGIO |
f75beb47 | 5821 | gobble_input (); |
f76475ad JB |
5822 | #endif |
5823 | ||
d35af63c | 5824 | wait_reading_process_output (sec, nsec, reading ? -1 : 1, do_display, |
dcd1ca45 | 5825 | Qnil, NULL, 0); |
f76475ad | 5826 | |
4588ec20 JB |
5827 | return detect_input_pending () ? Qnil : Qt; |
5828 | } | |
5829 | ||
5f5c8ee5 | 5830 | |
a7ca3326 | 5831 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
025de85b CY |
5832 | doc: /* Perform redisplay. |
5833 | Optional arg FORCE, if non-nil, prevents redisplay from being | |
5834 | preempted by arriving input, even if `redisplay-dont-pause' is nil. | |
5835 | If `redisplay-dont-pause' is non-nil (the default), redisplay is never | |
5836 | preempted by arriving input, so FORCE does nothing. | |
5837 | ||
5838 | Return t if redisplay was performed, nil if redisplay was preempted | |
5839 | immediately by pending input. */) | |
5842a27b | 5840 | (Lisp_Object force) |
f76475ad | 5841 | { |
d311d28c | 5842 | ptrdiff_t count; |
659d9874 | 5843 | |
902b9b6d KS |
5844 | swallow_events (1); |
5845 | if ((detect_input_pending_run_timers (1) | |
01327edf | 5846 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
5847 | || !NILP (Vexecuting_kbd_macro)) |
5848 | return Qnil; | |
f76475ad | 5849 | |
01327edf KS |
5850 | count = SPECPDL_INDEX (); |
5851 | if (!NILP (force) && !redisplay_dont_pause) | |
5852 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 5853 | redisplay_preserve_echo_area (2); |
01327edf | 5854 | unbind_to (count, Qnil); |
7ba07a1a | 5855 | return Qt; |
f76475ad | 5856 | } |
5f5c8ee5 GM |
5857 | |
5858 | ||
5859 | \f | |
5860 | /*********************************************************************** | |
5861 | Other Lisp Functions | |
5862 | ***********************************************************************/ | |
5863 | ||
5864 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
5865 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 5866 | buffer-modified-flags. */ |
5f5c8ee5 GM |
5867 | |
5868 | static Lisp_Object frame_and_buffer_state; | |
5869 | ||
5870 | ||
5871 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 5872 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 5873 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
5874 | VARIABLE is a variable name whose value is either nil or a state vector |
5875 | that will be updated to contain all frames and buffers, | |
228299fa | 5876 | aside from buffers whose names start with space, |
44edd521 RS |
5877 | along with the buffers' read-only and modified flags. This allows a fast |
5878 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 5879 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
5880 | the current state. |
5881 | ||
5882 | If VARIABLE is nil, an internal variable is used. Users should not | |
5883 | pass nil for VARIABLE. */) | |
5842a27b | 5884 | (Lisp_Object variable) |
5f5c8ee5 | 5885 | { |
44edd521 | 5886 | Lisp_Object state, tail, frame, buf; |
086ca913 | 5887 | ptrdiff_t n, idx; |
5f5c8ee5 | 5888 | |
44edd521 RS |
5889 | if (! NILP (variable)) |
5890 | { | |
5891 | CHECK_SYMBOL (variable); | |
5892 | state = Fsymbol_value (variable); | |
5893 | if (! VECTORP (state)) | |
5894 | goto changed; | |
5895 | } | |
5896 | else | |
5897 | state = frame_and_buffer_state; | |
5898 | ||
086ca913 | 5899 | idx = 0; |
5f5c8ee5 GM |
5900 | FOR_EACH_FRAME (tail, frame) |
5901 | { | |
086ca913 | 5902 | if (idx == ASIZE (state)) |
44edd521 | 5903 | goto changed; |
086ca913 | 5904 | if (!EQ (AREF (state, idx++), frame)) |
5f5c8ee5 | 5905 | goto changed; |
086ca913 | 5906 | if (idx == ASIZE (state)) |
44edd521 | 5907 | goto changed; |
086ca913 | 5908 | if (!EQ (AREF (state, idx++), XFRAME (frame)->name)) |
5f5c8ee5 GM |
5909 | goto changed; |
5910 | } | |
44edd521 | 5911 | /* Check that the buffer info matches. */ |
7539e11f | 5912 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 5913 | { |
7539e11f | 5914 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 5915 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 5916 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 5917 | continue; |
086ca913 | 5918 | if (idx == ASIZE (state)) |
44edd521 | 5919 | goto changed; |
086ca913 | 5920 | if (!EQ (AREF (state, idx++), buf)) |
5f5c8ee5 | 5921 | goto changed; |
086ca913 | 5922 | if (idx == ASIZE (state)) |
44edd521 | 5923 | goto changed; |
086ca913 | 5924 | if (!EQ (AREF (state, idx++), BVAR (XBUFFER (buf), read_only))) |
5f5c8ee5 | 5925 | goto changed; |
086ca913 | 5926 | if (idx == ASIZE (state)) |
44edd521 | 5927 | goto changed; |
086ca913 | 5928 | if (!EQ (AREF (state, idx++), Fbuffer_modified_p (buf))) |
5f5c8ee5 GM |
5929 | goto changed; |
5930 | } | |
086ca913 | 5931 | if (idx == ASIZE (state)) |
44edd521 | 5932 | goto changed; |
5f5c8ee5 | 5933 | /* Detect deletion of a buffer at the end of the list. */ |
086ca913 | 5934 | if (EQ (AREF (state, idx), Qlambda)) |
5f5c8ee5 | 5935 | return Qnil; |
44edd521 RS |
5936 | |
5937 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 5938 | changed: |
44edd521 RS |
5939 | /* Count the size we will need. |
5940 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
5941 | n = 1; |
5942 | FOR_EACH_FRAME (tail, frame) | |
5943 | n += 2; | |
7539e11f | 5944 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 5945 | n += 3; |
44edd521 RS |
5946 | /* Reallocate the vector if data has grown to need it, |
5947 | or if it has shrunk a lot. */ | |
5948 | if (! VECTORP (state) | |
77b37c05 PE |
5949 | || n > ASIZE (state) |
5950 | || n + 20 < ASIZE (state) / 2) | |
5f5c8ee5 | 5951 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
5952 | { |
5953 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
5954 | if (! NILP (variable)) | |
5955 | Fset (variable, state); | |
5956 | else | |
5957 | frame_and_buffer_state = state; | |
5958 | } | |
5959 | ||
5960 | /* Record the new data in the (possibly reallocated) vector. */ | |
086ca913 | 5961 | idx = 0; |
5f5c8ee5 GM |
5962 | FOR_EACH_FRAME (tail, frame) |
5963 | { | |
086ca913 DA |
5964 | ASET (state, idx, frame); |
5965 | idx++; | |
5966 | ASET (state, idx, XFRAME (frame)->name); | |
5967 | idx++; | |
5f5c8ee5 | 5968 | } |
7539e11f | 5969 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 5970 | { |
7539e11f | 5971 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 5972 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 5973 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 5974 | continue; |
086ca913 DA |
5975 | ASET (state, idx, buf); |
5976 | idx++; | |
5977 | ASET (state, idx, BVAR (XBUFFER (buf), read_only)); | |
5978 | idx++; | |
5979 | ASET (state, idx, Fbuffer_modified_p (buf)); | |
5980 | idx++; | |
5f5c8ee5 GM |
5981 | } |
5982 | /* Fill up the vector with lambdas (always at least one). */ | |
086ca913 DA |
5983 | ASET (state, idx, Qlambda); |
5984 | idx++; | |
5985 | while (idx < ASIZE (state)) | |
5986 | { | |
5987 | ASET (state, idx, Qlambda); | |
5988 | idx++; | |
5989 | } | |
5f5c8ee5 | 5990 | /* Make sure we didn't overflow the vector. */ |
086ca913 | 5991 | eassert (idx <= ASIZE (state)); |
5f5c8ee5 GM |
5992 | return Qt; |
5993 | } | |
5994 | ||
5995 | ||
4588ec20 | 5996 | \f |
5f5c8ee5 GM |
5997 | /*********************************************************************** |
5998 | Initialization | |
5999 | ***********************************************************************/ | |
6000 | ||
5f5c8ee5 GM |
6001 | /* Initialization done when Emacs fork is started, before doing stty. |
6002 | Determine terminal type and set terminal_driver. Then invoke its | |
6003 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 6004 | |
dfcf069d | 6005 | void |
971de7fb | 6006 | init_display (void) |
4588ec20 | 6007 | { |
28d440ab KL |
6008 | char *terminal_type; |
6009 | ||
5f5c8ee5 GM |
6010 | /* Construct the space glyph. */ |
6011 | space_glyph.type = CHAR_GLYPH; | |
3fc809e2 | 6012 | SET_CHAR_GLYPH (space_glyph, ' ', DEFAULT_FACE_ID, 0); |
5f5c8ee5 GM |
6013 | space_glyph.charpos = -1; |
6014 | ||
4588ec20 JB |
6015 | inverse_video = 0; |
6016 | cursor_in_echo_area = 0; | |
6017 | terminal_type = (char *) 0; | |
6018 | ||
1315c181 JB |
6019 | /* Now is the time to initialize this; it's used by init_sys_modes |
6020 | during startup. */ | |
2246281f | 6021 | Vinitial_window_system = Qnil; |
4588ec20 | 6022 | |
4181ad9c KL |
6023 | /* SIGWINCH needs to be handled no matter what display we start |
6024 | with. Otherwise newly opened tty frames will not resize | |
6025 | automatically. */ | |
6026 | #ifdef SIGWINCH | |
6027 | #ifndef CANNOT_DUMP | |
6028 | if (initialized) | |
6029 | #endif /* CANNOT_DUMP */ | |
2fe28299 PE |
6030 | { |
6031 | struct sigaction action; | |
6032 | emacs_sigaction_init (&action, deliver_window_change_signal); | |
6033 | sigaction (SIGWINCH, &action, 0); | |
6034 | } | |
4181ad9c | 6035 | #endif /* SIGWINCH */ |
4588ec20 | 6036 | |
d6ef42b9 | 6037 | /* If running as a daemon, no need to initialize any frames/terminal. */ |
ff808935 DN |
6038 | if (IS_DAEMON) |
6039 | return; | |
d6ef42b9 | 6040 | |
1315c181 JB |
6041 | /* If the user wants to use a window system, we shouldn't bother |
6042 | initializing the terminal. This is especially important when the | |
6043 | terminal is so dumb that emacs gives up before and doesn't bother | |
6044 | using the window system. | |
4588ec20 | 6045 | |
36bbad1d KH |
6046 | If the DISPLAY environment variable is set and nonempty, |
6047 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6048 | |
6049 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 6050 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 6051 | { |
36bbad1d | 6052 | char *display; |
36bbad1d | 6053 | display = getenv ("DISPLAY"); |
36bbad1d | 6054 | display_arg = (display != 0 && *display != 0); |
c1fc674b AS |
6055 | |
6056 | if (display_arg && !x_display_ok (display)) | |
6057 | { | |
6058 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
6059 | display); | |
6060 | inhibit_window_system = 1; | |
6061 | } | |
f040093a | 6062 | } |
d460af17 | 6063 | |
4fcc2638 | 6064 | if (!inhibit_window_system && display_arg) |
4588ec20 | 6065 | { |
111d9af3 | 6066 | Vinitial_window_system = Qx; |
4588ec20 JB |
6067 | #ifdef HAVE_X11 |
6068 | Vwindow_system_version = make_number (11); | |
039e5d71 | 6069 | #endif |
9311dcff | 6070 | #ifdef GNU_LINUX |
039e5d71 | 6071 | /* In some versions of ncurses, |
6a428f77 | 6072 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6073 | So call tgetent. */ |
6074 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 JB |
6075 | #endif |
6076 | return; | |
6077 | } | |
6078 | #endif /* HAVE_X_WINDOWS */ | |
6079 | ||
fd2e066a | 6080 | #ifdef HAVE_NTGUI |
177c0ea7 | 6081 | if (!inhibit_window_system) |
fd2e066a | 6082 | { |
111d9af3 | 6083 | Vinitial_window_system = Qw32; |
fd2e066a GV |
6084 | Vwindow_system_version = make_number (1); |
6085 | return; | |
6086 | } | |
6087 | #endif /* HAVE_NTGUI */ | |
6088 | ||
edfda783 AR |
6089 | #ifdef HAVE_NS |
6090 | if (!inhibit_window_system | |
6091 | #ifndef CANNOT_DUMP | |
6092 | && initialized | |
6093 | #endif | |
6094 | ) | |
6095 | { | |
111d9af3 | 6096 | Vinitial_window_system = Qns; |
5e617bc2 | 6097 | Vwindow_system_version = make_number (10); |
edfda783 AR |
6098 | return; |
6099 | } | |
6100 | #endif | |
6101 | ||
4588ec20 JB |
6102 | /* If no window system has been specified, try to use the terminal. */ |
6103 | if (! isatty (0)) | |
6104 | { | |
1559a86d | 6105 | fatal ("standard input is not a tty"); |
4588ec20 JB |
6106 | exit (1); |
6107 | } | |
6108 | ||
6152361f JR |
6109 | #ifdef WINDOWSNT |
6110 | terminal_type = "w32console"; | |
6111 | #else | |
153a073c | 6112 | /* Look at the TERM variable. */ |
4588ec20 | 6113 | terminal_type = (char *) getenv ("TERM"); |
6152361f | 6114 | #endif |
4588ec20 JB |
6115 | if (!terminal_type) |
6116 | { | |
5d12ff0b | 6117 | #ifdef HAVE_WINDOW_SYSTEM |
b9e590fc RS |
6118 | if (! inhibit_window_system) |
6119 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6120 | else |
6121 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6122 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
4588ec20 JB |
6123 | exit (1); |
6124 | } | |
6125 | ||
0a125897 | 6126 | { |
6ed8eeff | 6127 | struct terminal *t; |
3224dac1 KL |
6128 | struct frame *f = XFRAME (selected_frame); |
6129 | ||
322aea6d PE |
6130 | init_foreground_group (); |
6131 | ||
3224dac1 | 6132 | /* Open a display on the controlling tty. */ |
6ed8eeff | 6133 | t = init_tty (0, terminal_type, 1); /* Errors are fatal. */ |
3224dac1 KL |
6134 | |
6135 | /* Convert the initial frame to use the new display. */ | |
b04f5ad2 | 6136 | if (f->output_method != output_initial) |
1088b922 | 6137 | emacs_abort (); |
6ed8eeff KL |
6138 | f->output_method = t->type; |
6139 | f->terminal = t; | |
3224dac1 | 6140 | |
6ed8eeff | 6141 | t->reference_count++; |
7ac5dac9 EZ |
6142 | #ifdef MSDOS |
6143 | f->output_data.tty->display_info = &the_only_display_info; | |
6144 | #else | |
6145 | if (f->output_method == output_termcap) | |
6146 | create_tty_output (f); | |
6147 | #endif | |
6ed8eeff | 6148 | t->display_info.tty->top_frame = selected_frame; |
5b65d888 | 6149 | change_frame_size (XFRAME (selected_frame), |
6ed8eeff KL |
6150 | FrameRows (t->display_info.tty), |
6151 | FrameCols (t->display_info.tty), 0, 0, 1); | |
3224dac1 | 6152 | |
6ed8eeff KL |
6153 | /* Delete the initial terminal. */ |
6154 | if (--initial_terminal->reference_count == 0 | |
6155 | && initial_terminal->delete_terminal_hook) | |
6156 | (*initial_terminal->delete_terminal_hook) (initial_terminal); | |
2666355c KL |
6157 | |
6158 | /* Update frame parameters to reflect the new type. */ | |
6159 | Fmodify_frame_parameters | |
6160 | (selected_frame, Fcons (Fcons (Qtty_type, | |
6ed8eeff | 6161 | Ftty_type (selected_frame)), Qnil)); |
657ceaa0 EZ |
6162 | if (t->display_info.tty->name) |
6163 | Fmodify_frame_parameters (selected_frame, | |
6164 | Fcons (Fcons (Qtty, build_string (t->display_info.tty->name)), | |
6165 | Qnil)); | |
6166 | else | |
6167 | Fmodify_frame_parameters (selected_frame, Fcons (Fcons (Qtty, Qnil), | |
6168 | Qnil)); | |
0a125897 | 6169 | } |
3fc809e2 | 6170 | |
d86c299a | 6171 | { |
91fb7e1b | 6172 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6173 | int width = FRAME_TOTAL_COLS (sf); |
6174 | int height = FRAME_LINES (sf); | |
d86c299a | 6175 | |
5f5c8ee5 | 6176 | /* If these sizes are so big they cause overflow, just ignore the |
dfd153ae PE |
6177 | change. It's not clear what better we could do. The rest of |
6178 | the code assumes that (width + 2) * height * sizeof (struct glyph) | |
6179 | does not overflow and does not exceed PTRDIFF_MAX or SIZE_MAX. */ | |
e3c25c68 PE |
6180 | if (INT_ADD_RANGE_OVERFLOW (width, 2, INT_MIN, INT_MAX) |
6181 | || INT_MULTIPLY_RANGE_OVERFLOW (width + 2, height, INT_MIN, INT_MAX) | |
dfd153ae PE |
6182 | || (min (PTRDIFF_MAX, SIZE_MAX) / sizeof (struct glyph) |
6183 | < (width + 2) * height)) | |
1559a86d | 6184 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6185 | } |
6186 | ||
91fb7e1b | 6187 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6188 | |
5f5c8ee5 GM |
6189 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ |
6190 | if (initialized | |
6191 | && !noninteractive | |
2246281f | 6192 | && NILP (Vinitial_window_system)) |
2d764c78 EZ |
6193 | { |
6194 | /* For the initial frame, we don't have any way of knowing what | |
6195 | are the foreground and background colors of the terminal. */ | |
5e617bc2 | 6196 | struct frame *sf = SELECTED_FRAME (); |
2d764c78 | 6197 | |
f9d2fdc4 EZ |
6198 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
6199 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
6200 | call0 (intern ("tty-set-up-initial-frame-faces")); |
6201 | } | |
5f5c8ee5 GM |
6202 | } |
6203 | ||
6204 | ||
6205 | \f | |
6206 | /*********************************************************************** | |
6207 | Blinking cursor | |
6208 | ***********************************************************************/ | |
6209 | ||
c3f13540 | 6210 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 6211 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 6212 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
6213 | WINDOW nil means use the selected window. SHOW non-nil means |
6214 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 | 6215 | don't show a cursor. */) |
5842a27b | 6216 | (Lisp_Object window, Lisp_Object show) |
5f5c8ee5 | 6217 | { |
5f5c8ee5 GM |
6218 | /* Don't change cursor state while redisplaying. This could confuse |
6219 | output routines. */ | |
6220 | if (!redisplaying_p) | |
b9e9df47 | 6221 | decode_any_window (window)->cursor_off_p = NILP (show); |
5f5c8ee5 | 6222 | return Qnil; |
4588ec20 | 6223 | } |
5f5c8ee5 GM |
6224 | |
6225 | ||
5d7791b3 GM |
6226 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
6227 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 6228 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 | 6229 | WINDOW nil or omitted means report on the selected window. */) |
5842a27b | 6230 | (Lisp_Object window) |
5d7791b3 | 6231 | { |
b9e9df47 | 6232 | return decode_any_window (window)->cursor_off_p ? Qnil : Qt; |
5d7791b3 GM |
6233 | } |
6234 | ||
87478b52 SM |
6235 | DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame, |
6236 | Slast_nonminibuf_frame, 0, 0, 0, | |
6237 | doc: /* Value is last nonminibuffer frame. */) | |
5842a27b | 6238 | (void) |
87478b52 | 6239 | { |
4958ed94 | 6240 | Lisp_Object frame = Qnil; |
87478b52 | 6241 | |
4958ed94 SM |
6242 | if (last_nonminibuf_frame) |
6243 | XSETFRAME (frame, last_nonminibuf_frame); | |
87478b52 SM |
6244 | |
6245 | return frame; | |
6246 | } | |
4588ec20 | 6247 | \f |
5f5c8ee5 GM |
6248 | /*********************************************************************** |
6249 | Initialization | |
6250 | ***********************************************************************/ | |
6251 | ||
dfcf069d | 6252 | void |
971de7fb | 6253 | syms_of_display (void) |
4588ec20 | 6254 | { |
502b9b64 | 6255 | defsubr (&Sredraw_frame); |
4588ec20 | 6256 | defsubr (&Sredraw_display); |
078b3696 | 6257 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
6258 | defsubr (&Sopen_termscript); |
6259 | defsubr (&Sding); | |
7ba07a1a | 6260 | defsubr (&Sredisplay); |
4588ec20 JB |
6261 | defsubr (&Ssleep_for); |
6262 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 6263 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 6264 | defsubr (&Sinternal_show_cursor_p); |
87478b52 | 6265 | defsubr (&Slast_nonminibuf_frame); |
4588ec20 | 6266 | |
e509cfa6 | 6267 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
6268 | defsubr (&Sdump_redisplay_history); |
6269 | #endif | |
6270 | ||
d1dad759 | 6271 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
6272 | staticpro (&frame_and_buffer_state); |
6273 | ||
cd3520a4 JB |
6274 | DEFSYM (Qdisplay_table, "display-table"); |
6275 | DEFSYM (Qredisplay_dont_pause, "redisplay-dont-pause"); | |
9cda4f7c | 6276 | |
29208e82 | 6277 | DEFVAR_INT ("baud-rate", baud_rate, |
025de85b | 6278 | doc: /* The output baud rate of the terminal. |
228299fa GM |
6279 | On most systems, changing this value will affect the amount of padding |
6280 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 6281 | |
29208e82 | 6282 | DEFVAR_BOOL ("inverse-video", inverse_video, |
025de85b | 6283 | doc: /* Non-nil means invert the entire frame display. |
228299fa | 6284 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 6285 | |
29208e82 | 6286 | DEFVAR_BOOL ("visible-bell", visible_bell, |
025de85b | 6287 | doc: /* Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
6288 | |
6289 | See also `ring-bell-function'. */); | |
177c0ea7 | 6290 | |
29208e82 | 6291 | DEFVAR_BOOL ("no-redraw-on-reenter", no_redraw_on_reenter, |
025de85b | 6292 | doc: /* Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
6293 | A non-nil value is useful if the terminal can automatically preserve |
6294 | Emacs's frame display when you reenter Emacs. | |
6295 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 6296 | |
29208e82 | 6297 | DEFVAR_LISP ("initial-window-system", Vinitial_window_system, |
2246281f | 6298 | doc: /* Name of the window system that Emacs uses for the first frame. |
89baa1df EZ |
6299 | The value is a symbol: |
6300 | nil for a termcap frame (a character-only terminal), | |
6301 | 'x' for an Emacs frame that is really an X window, | |
6302 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6303 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6304 | 'pc' for a direct-write MS-DOS frame. | |
6305 | ||
6306 | Use of this variable as a boolean is deprecated. Instead, | |
6307 | use `display-graphic-p' or any of the other `display-*-p' | |
6308 | predicates which report frame's specific UI-related capabilities. */); | |
177c0ea7 | 6309 | |
70b8d0a4 SM |
6310 | DEFVAR_KBOARD ("window-system", Vwindow_system, |
6311 | doc: /* Name of window system through which the selected frame is displayed. | |
89baa1df EZ |
6312 | The value is a symbol: |
6313 | nil for a termcap frame (a character-only terminal), | |
6314 | 'x' for an Emacs frame that is really an X window, | |
6315 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6316 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6317 | 'pc' for a direct-write MS-DOS frame. | |
6318 | ||
6319 | Use of this variable as a boolean is deprecated. Instead, | |
6320 | use `display-graphic-p' or any of the other `display-*-p' | |
6321 | predicates which report frame's specific UI-related capabilities. */); | |
70b8d0a4 | 6322 | |
29208e82 | 6323 | DEFVAR_LISP ("window-system-version", Vwindow_system_version, |
bacf09b4 | 6324 | doc: /* The version number of the window system in use. |
c22140f6 | 6325 | For X windows, this is 11. */); |
177c0ea7 | 6326 | |
29208e82 | 6327 | DEFVAR_BOOL ("cursor-in-echo-area", cursor_in_echo_area, |
bacf09b4 | 6328 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 6329 | |
29208e82 | 6330 | DEFVAR_LISP ("glyph-table", Vglyph_table, |
bacf09b4 | 6331 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
6332 | If not nil, this is a vector indexed by glyph code to define the glyph. |
6333 | Each element can be: | |
6334 | integer: a glyph code which this glyph is an alias for. | |
6335 | string: output this glyph using that string (not impl. in X windows). | |
6336 | nil: this glyph mod 524288 is the code of a character to output, | |
6337 | and this glyph / 524288 is the face number (see `face-id') to use | |
6338 | while outputting it. */); | |
4588ec20 JB |
6339 | Vglyph_table = Qnil; |
6340 | ||
29208e82 | 6341 | DEFVAR_LISP ("standard-display-table", Vstandard_display_table, |
bacf09b4 | 6342 | doc: /* Display table to use for buffers that specify none. |
228299fa | 6343 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
6344 | Vstandard_display_table = Qnil; |
6345 | ||
29208e82 | 6346 | DEFVAR_BOOL ("redisplay-dont-pause", redisplay_dont_pause, |
025de85b | 6347 | doc: /* Non-nil means display update isn't paused when input is detected. */); |
6bf7006f | 6348 | redisplay_dont_pause = 1; |
5f5c8ee5 | 6349 | |
4588ec20 JB |
6350 | #ifdef CANNOT_DUMP |
6351 | if (noninteractive) | |
6352 | #endif | |
6353 | { | |
2246281f | 6354 | Vinitial_window_system = Qnil; |
4588ec20 JB |
6355 | Vwindow_system_version = Qnil; |
6356 | } | |
6357 | } |