Commit | Line | Data |
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4588ec20 | 1 | /* Updating of data structures for redisplay. |
9311dcff | 2 | |
ab422c4d PE |
3 | Copyright (C) 1985-1988, 1993-1995, 1997-2013 Free Software Foundation, |
4 | Inc. | |
4588ec20 JB |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
9ec0b715 | 8 | GNU Emacs is free software: you can redistribute it and/or modify |
4588ec20 | 9 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
10 | the Free Software Foundation, either version 3 of the License, or |
11 | (at your option) any later version. | |
4588ec20 JB |
12 | |
13 | GNU Emacs is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
4588ec20 | 20 | |
18160b98 | 21 | #include <config.h> |
f162bcc3 PE |
22 | |
23 | #define DISPEXTERN_INLINE EXTERN_INLINE | |
24 | ||
406af475 | 25 | #include "sysstdio.h" |
dfcf069d | 26 | #include <unistd.h> |
dfcf069d | 27 | |
47099d6f | 28 | #include "lisp.h" |
4588ec20 | 29 | #include "termchar.h" |
a0879520 | 30 | /* cm.h must come after dispextern.h on Windows. */ |
fd2e066a GV |
31 | #include "dispextern.h" |
32 | #include "cm.h" | |
83be827a | 33 | #include "character.h" |
e5560ff7 | 34 | #include "buffer.h" |
d43721a2 | 35 | #include "keyboard.h" |
502b9b64 | 36 | #include "frame.h" |
428a555e | 37 | #include "termhooks.h" |
4588ec20 JB |
38 | #include "window.h" |
39 | #include "commands.h" | |
40 | #include "disptab.h" | |
41 | #include "indent.h" | |
d169fe39 | 42 | #include "intervals.h" |
97cf50e7 | 43 | #include "blockinput.h" |
dfcf069d | 44 | #include "process.h" |
4588ec20 | 45 | |
58b2bb63 | 46 | #include "syssignal.h" |
a41f8bed | 47 | |
17a2cbbd DC |
48 | #ifdef HAVE_WINDOW_SYSTEM |
49 | #include TERM_HEADER | |
50 | #endif /* HAVE_WINDOW_SYSTEM */ | |
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; | |
29abe551 | 216 | void *ptr = w; |
177c0ea7 | 217 | |
9b0e97aa GM |
218 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
219 | history_idx = 0; | |
220 | buf = redisplay_history[history_idx].trace; | |
221 | ++history_idx; | |
177c0ea7 | 222 | |
8666506e PE |
223 | snprintf (buf, sizeof redisplay_history[0].trace, |
224 | "%"pMu": window %p (`%s')%s\n%s", | |
225 | history_tick++, | |
29abe551 | 226 | ptr, |
e74aeda8 DA |
227 | ((BUFFERP (w->contents) |
228 | && STRINGP (BVAR (XBUFFER (w->contents), name))) | |
229 | ? SSDATA (BVAR (XBUFFER (w->contents), name)) | |
8666506e PE |
230 | : "???"), |
231 | paused_p ? " ***paused***" : "", | |
232 | msg); | |
9b0e97aa GM |
233 | } |
234 | ||
235 | ||
236 | /* Add to the redisplay history that frame F has been displayed. | |
59ea14cd | 237 | PAUSED_P means that the update has been interrupted for |
9b0e97aa GM |
238 | pending input. */ |
239 | ||
240 | static void | |
59ea14cd | 241 | add_frame_display_history (struct frame *f, bool paused_p) |
9b0e97aa GM |
242 | { |
243 | char *buf; | |
29abe551 | 244 | void *ptr = f; |
177c0ea7 | 245 | |
9b0e97aa GM |
246 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
247 | history_idx = 0; | |
248 | buf = redisplay_history[history_idx].trace; | |
249 | ++history_idx; | |
177c0ea7 | 250 | |
dfd153ae | 251 | sprintf (buf, "%"pMu": update frame %p%s", |
9b0e97aa | 252 | history_tick++, |
29abe551 | 253 | ptr, paused_p ? " ***paused***" : ""); |
9b0e97aa GM |
254 | } |
255 | ||
256 | ||
a7ca3326 | 257 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, |
9b0e97aa | 258 | Sdump_redisplay_history, 0, 0, "", |
7ee72033 | 259 | doc: /* Dump redisplay history to stderr. */) |
5842a27b | 260 | (void) |
9b0e97aa GM |
261 | { |
262 | int i; | |
263 | ||
264 | for (i = history_idx - 1; i != history_idx; --i) | |
265 | { | |
266 | if (i < 0) | |
267 | i = REDISPLAY_HISTORY_SIZE - 1; | |
268 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
269 | } | |
270 | ||
271 | return Qnil; | |
272 | } | |
273 | ||
274 | ||
e509cfa6 | 275 | #else /* not GLYPH_DEBUG */ |
4588ec20 | 276 | |
7df02016 KS |
277 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
278 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 279 | |
e509cfa6 | 280 | #endif /* GLYPH_DEBUG */ |
4588ec20 | 281 | |
4588ec20 | 282 | |
9e4bf381 PE |
283 | #if (defined PROFILING \ |
284 | && (defined __FreeBSD__ || defined GNU_LINUX || defined __MINGW32__) \ | |
285 | && !HAVE___EXECUTABLE_START) | |
286 | /* This function comes first in the Emacs executable and is used only | |
287 | to estimate the text start for profiling. */ | |
4588ec20 | 288 | void |
9e4bf381 | 289 | __executable_start (void) |
4588ec20 | 290 | { |
1088b922 | 291 | emacs_abort (); |
177c0ea7 | 292 | } |
72af86bd | 293 | #endif |
5f5c8ee5 GM |
294 | \f |
295 | /*********************************************************************** | |
296 | Glyph Matrices | |
297 | ***********************************************************************/ | |
298 | ||
299 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
300 | pool from which memory for the matrix should be allocated, or null | |
301 | for window-based redisplay where no glyph pools are used. The | |
302 | member `pool' of the glyph matrix structure returned is set to | |
303 | POOL, the structure is otherwise zeroed. */ | |
304 | ||
5bf46f05 | 305 | static struct glyph_matrix * |
971de7fb | 306 | new_glyph_matrix (struct glyph_pool *pool) |
4588ec20 | 307 | { |
23f86fce | 308 | struct glyph_matrix *result = xzalloc (sizeof *result); |
4588ec20 | 309 | |
5f5c8ee5 GM |
310 | /* Increment number of allocated matrices. This count is used |
311 | to detect memory leaks. */ | |
312 | ++glyph_matrix_count; | |
4588ec20 | 313 | |
5f5c8ee5 GM |
314 | /* Set pool and return. */ |
315 | result->pool = pool; | |
316 | return result; | |
4588ec20 JB |
317 | } |
318 | ||
4588ec20 | 319 | |
5f5c8ee5 GM |
320 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
321 | ||
322 | The global counter glyph_matrix_count is decremented when a matrix | |
323 | is freed. If the count gets negative, more structures were freed | |
324 | than allocated, i.e. one matrix was freed more than once or a bogus | |
325 | pointer was passed to this function. | |
177c0ea7 | 326 | |
5f5c8ee5 GM |
327 | If MATRIX->pool is null, this means that the matrix manages its own |
328 | glyph memory---this is done for matrices on X frames. Freeing the | |
329 | matrix also frees the glyph memory in this case. */ | |
330 | ||
331 | static void | |
971de7fb | 332 | free_glyph_matrix (struct glyph_matrix *matrix) |
4588ec20 | 333 | { |
5f5c8ee5 GM |
334 | if (matrix) |
335 | { | |
336 | int i; | |
337 | ||
338 | /* Detect the case that more matrices are freed than were | |
339 | allocated. */ | |
340 | if (--glyph_matrix_count < 0) | |
1088b922 | 341 | emacs_abort (); |
5f5c8ee5 GM |
342 | |
343 | /* Free glyph memory if MATRIX owns it. */ | |
344 | if (matrix->pool == NULL) | |
345 | for (i = 0; i < matrix->rows_allocated; ++i) | |
346 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 347 | |
5f5c8ee5 GM |
348 | /* Free row structures and the matrix itself. */ |
349 | xfree (matrix->rows); | |
350 | xfree (matrix); | |
351 | } | |
352 | } | |
4588ec20 | 353 | |
4588ec20 | 354 | |
5f5c8ee5 GM |
355 | /* Return the number of glyphs to reserve for a marginal area of |
356 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
357 | display line of window W. MARGIN gives the width of the marginal | |
358 | area in canonical character units. MARGIN should be an integer | |
359 | or a float. */ | |
360 | ||
361 | static int | |
971de7fb | 362 | margin_glyphs_to_reserve (struct window *w, int total_glyphs, Lisp_Object margin) |
5f5c8ee5 GM |
363 | { |
364 | int n; | |
4588ec20 | 365 | |
5f5c8ee5 | 366 | if (NUMBERP (margin)) |
4588ec20 | 367 | { |
5f24fa51 | 368 | int width = w->total_cols; |
5f5c8ee5 GM |
369 | double d = max (0, XFLOATINT (margin)); |
370 | d = min (width / 2 - 1, d); | |
35ec832e | 371 | n = (int) ((double) total_glyphs / width * d); |
5f5c8ee5 GM |
372 | } |
373 | else | |
374 | n = 0; | |
375 | ||
376 | return n; | |
377 | } | |
378 | ||
59ea14cd | 379 | /* Return true if ROW's hash value is correct. |
e509cfa6 DA |
380 | Optimized away if ENABLE_CHECKING is not defined. */ |
381 | ||
59ea14cd | 382 | static bool |
7a7270dd EZ |
383 | verify_row_hash (struct glyph_row *row) |
384 | { | |
015137db | 385 | return row->hash == row_hash (row); |
7a7270dd | 386 | } |
4588ec20 | 387 | |
5f5c8ee5 GM |
388 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
389 | window sizes. | |
4588ec20 | 390 | |
5f5c8ee5 GM |
391 | W is null if the function is called for a frame glyph matrix. |
392 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
393 | indices of the first column and row of MATRIX within the frame | |
394 | matrix, if such a matrix exists. They are zero for purely | |
395 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 396 | |
5f5c8ee5 GM |
397 | In window-based redisplay, where no frame matrices exist, glyph |
398 | matrices manage their own glyph storage. Otherwise, they allocate | |
399 | storage from a common frame glyph pool which can be found in | |
400 | MATRIX->pool. | |
23b0200c | 401 | |
5f5c8ee5 GM |
402 | The reason for this memory management strategy is to avoid complete |
403 | frame redraws if possible. When we allocate from a common pool, a | |
404 | change of the location or size of a sub-matrix within the pool | |
405 | requires a complete redisplay of the frame because we cannot easily | |
406 | make sure that the current matrices of all windows still agree with | |
407 | what is displayed on the screen. While this is usually fast, it | |
408 | leads to screen flickering. */ | |
23b0200c | 409 | |
5f5c8ee5 | 410 | static void |
971de7fb | 411 | adjust_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int x, int y, struct dim dim) |
5f5c8ee5 GM |
412 | { |
413 | int i; | |
414 | int new_rows; | |
59ea14cd PE |
415 | bool marginal_areas_changed_p = 0; |
416 | bool header_line_changed_p = 0; | |
417 | bool header_line_p = 0; | |
5f5c8ee5 | 418 | int left = -1, right = -1; |
ca8a12a7 | 419 | int window_width = -1, window_height = -1; |
5f5c8ee5 | 420 | |
6b61353c KH |
421 | /* See if W had a header line that has disappeared now, or vice versa. |
422 | Get W's size. */ | |
5f5c8ee5 GM |
423 | if (w) |
424 | { | |
6b61353c KH |
425 | window_box (w, -1, 0, 0, &window_width, &window_height); |
426 | ||
045dee35 GM |
427 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
428 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 429 | } |
045dee35 | 430 | matrix->header_line_p = header_line_p; |
23b0200c | 431 | |
6b61353c KH |
432 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
433 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
434 | haven't changed. This optimization is important because preserving |
435 | the matrix means preventing redisplay. */ | |
436 | if (matrix->pool == NULL) | |
437 | { | |
d3d50620 DA |
438 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
439 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
a54e2c05 | 440 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
441 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs |
442 | || right != matrix->right_margin_glyphs); | |
443 | ||
444 | if (!marginal_areas_changed_p | |
445 | && !fonts_changed_p | |
045dee35 | 446 | && !header_line_changed_p |
7df02016 KS |
447 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
448 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
449 | && matrix->window_height == window_height |
450 | && matrix->window_vscroll == w->vscroll | |
451 | && matrix->window_width == window_width) | |
452 | return; | |
453 | } | |
177c0ea7 | 454 | |
5f5c8ee5 GM |
455 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
456 | if (matrix->rows_allocated < dim.height) | |
457 | { | |
0065d054 | 458 | int old_alloc = matrix->rows_allocated; |
5f5c8ee5 | 459 | new_rows = dim.height - matrix->rows_allocated; |
0065d054 PE |
460 | matrix->rows = xpalloc (matrix->rows, &matrix->rows_allocated, |
461 | new_rows, INT_MAX, sizeof *matrix->rows); | |
462 | memset (matrix->rows + old_alloc, 0, | |
463 | (matrix->rows_allocated - old_alloc) * sizeof *matrix->rows); | |
5f5c8ee5 GM |
464 | } |
465 | else | |
466 | new_rows = 0; | |
60a8948a | 467 | |
5f5c8ee5 GM |
468 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
469 | on a frame not using window-based redisplay. Set up pointers for | |
470 | each row into the glyph pool. */ | |
471 | if (matrix->pool) | |
472 | { | |
a54e2c05 | 473 | eassert (matrix->pool->glyphs); |
177c0ea7 | 474 | |
5f5c8ee5 | 475 | if (w) |
60a8948a | 476 | { |
5f5c8ee5 | 477 | left = margin_glyphs_to_reserve (w, dim.width, |
d3d50620 | 478 | w->left_margin_cols); |
5f5c8ee5 | 479 | right = margin_glyphs_to_reserve (w, dim.width, |
d3d50620 | 480 | w->right_margin_cols); |
60a8948a | 481 | } |
5f5c8ee5 GM |
482 | else |
483 | left = right = 0; | |
177c0ea7 | 484 | |
5f5c8ee5 | 485 | for (i = 0; i < dim.height; ++i) |
60a8948a | 486 | { |
5f5c8ee5 | 487 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
488 | |
489 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
490 | = (matrix->pool->glyphs |
491 | + (y + i) * matrix->pool->ncolumns | |
492 | + x); | |
177c0ea7 | 493 | |
5f5c8ee5 GM |
494 | if (w == NULL |
495 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 496 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
497 | { |
498 | row->glyphs[TEXT_AREA] | |
499 | = row->glyphs[LEFT_MARGIN_AREA]; | |
500 | row->glyphs[RIGHT_MARGIN_AREA] | |
501 | = row->glyphs[TEXT_AREA] + dim.width; | |
502 | row->glyphs[LAST_AREA] | |
503 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
504 | } | |
505 | else | |
506 | { | |
507 | row->glyphs[TEXT_AREA] | |
508 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
509 | row->glyphs[RIGHT_MARGIN_AREA] | |
510 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
511 | row->glyphs[LAST_AREA] | |
512 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
513 | } | |
60a8948a | 514 | } |
177c0ea7 | 515 | |
5f5c8ee5 GM |
516 | matrix->left_margin_glyphs = left; |
517 | matrix->right_margin_glyphs = right; | |
518 | } | |
519 | else | |
520 | { | |
521 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
6b61353c KH |
522 | its own memory. It is a window matrix for window-based redisplay. |
523 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
524 | if (dim.width > matrix->matrix_w |
525 | || new_rows | |
045dee35 | 526 | || header_line_changed_p |
5f5c8ee5 | 527 | || marginal_areas_changed_p) |
4588ec20 | 528 | { |
5f5c8ee5 GM |
529 | struct glyph_row *row = matrix->rows; |
530 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 531 | |
5f5c8ee5 GM |
532 | while (row < end) |
533 | { | |
534 | row->glyphs[LEFT_MARGIN_AREA] | |
0065d054 PE |
535 | = xnrealloc (row->glyphs[LEFT_MARGIN_AREA], |
536 | dim.width, sizeof (struct glyph)); | |
177c0ea7 | 537 | |
5f5c8ee5 GM |
538 | /* The mode line never has marginal areas. */ |
539 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 540 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
541 | { |
542 | row->glyphs[TEXT_AREA] | |
543 | = row->glyphs[LEFT_MARGIN_AREA]; | |
544 | row->glyphs[RIGHT_MARGIN_AREA] | |
545 | = row->glyphs[TEXT_AREA] + dim.width; | |
546 | row->glyphs[LAST_AREA] | |
547 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
548 | } | |
549 | else | |
550 | { | |
551 | row->glyphs[TEXT_AREA] | |
552 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
553 | row->glyphs[RIGHT_MARGIN_AREA] | |
554 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
555 | row->glyphs[LAST_AREA] | |
556 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
557 | } | |
558 | ++row; | |
559 | } | |
4588ec20 JB |
560 | } |
561 | ||
a54e2c05 | 562 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
563 | matrix->left_margin_glyphs = left; |
564 | matrix->right_margin_glyphs = right; | |
565 | } | |
177c0ea7 | 566 | |
5f5c8ee5 GM |
567 | /* Number of rows to be used by MATRIX. */ |
568 | matrix->nrows = dim.height; | |
a54e2c05 | 569 | eassert (matrix->nrows >= 0); |
5f5c8ee5 | 570 | |
b7b20fbd | 571 | if (w) |
5f5c8ee5 | 572 | { |
b7b20fbd | 573 | if (matrix == w->current_matrix) |
4588ec20 | 574 | { |
b7b20fbd GM |
575 | /* Mark rows in a current matrix of a window as not having |
576 | valid contents. It's important to not do this for | |
577 | desired matrices. When Emacs starts, it may already be | |
578 | building desired matrices when this function runs. */ | |
579 | if (window_width < 0) | |
580 | window_width = window_box_width (w, -1); | |
177c0ea7 | 581 | |
b7b20fbd GM |
582 | /* Optimize the case that only the height has changed (C-x 2, |
583 | upper window). Invalidate all rows that are no longer part | |
584 | of the window. */ | |
585 | if (!marginal_areas_changed_p | |
73d75a62 GM |
586 | && !header_line_changed_p |
587 | && new_rows == 0 | |
588 | && dim.width == matrix->matrix_w | |
7df02016 KS |
589 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
590 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 591 | && matrix->window_width == window_width) |
b7b20fbd | 592 | { |
dd42b31a GM |
593 | /* Find the last row in the window. */ |
594 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
595 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
596 | { | |
26447967 | 597 | ++i; |
dd42b31a GM |
598 | break; |
599 | } | |
b7b20fbd GM |
600 | |
601 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 602 | are invalidated below. */ |
d3d50620 DA |
603 | if (INTEGERP (w->window_end_vpos) |
604 | && XFASTINT (w->window_end_vpos) >= i) | |
9d93ce29 | 605 | w->window_end_valid = 0; |
177c0ea7 | 606 | |
b7b20fbd GM |
607 | while (i < matrix->nrows) |
608 | matrix->rows[i++].enabled_p = 0; | |
609 | } | |
610 | else | |
611 | { | |
612 | for (i = 0; i < matrix->nrows; ++i) | |
613 | matrix->rows[i].enabled_p = 0; | |
614 | } | |
5f5c8ee5 | 615 | } |
b7b20fbd | 616 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 617 | { |
b7b20fbd GM |
618 | /* Rows in desired matrices always have to be cleared; |
619 | redisplay expects this is the case when it runs, so it | |
620 | had better be the case when we adjust matrices between | |
621 | redisplays. */ | |
5f5c8ee5 GM |
622 | for (i = 0; i < matrix->nrows; ++i) |
623 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 624 | } |
4588ec20 | 625 | } |
177c0ea7 JB |
626 | |
627 | ||
5f5c8ee5 GM |
628 | /* Remember last values to be able to optimize frame redraws. */ |
629 | matrix->matrix_x = x; | |
630 | matrix->matrix_y = y; | |
631 | matrix->matrix_w = dim.width; | |
632 | matrix->matrix_h = dim.height; | |
633 | ||
634 | /* Record the top y location and height of W at the time the matrix | |
635 | was last adjusted. This is used to optimize redisplay above. */ | |
636 | if (w) | |
4588ec20 | 637 | { |
7df02016 KS |
638 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
639 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
640 | matrix->window_height = window_height; |
641 | matrix->window_width = window_width; | |
642 | matrix->window_vscroll = w->vscroll; | |
643 | } | |
644 | } | |
4588ec20 | 645 | |
4588ec20 | 646 | |
5f5c8ee5 GM |
647 | /* Reverse the contents of rows in MATRIX between START and END. The |
648 | contents of the row at END - 1 end up at START, END - 2 at START + | |
649 | 1 etc. This is part of the implementation of rotate_matrix (see | |
650 | below). */ | |
d52bad65 | 651 | |
5f5c8ee5 | 652 | static void |
971de7fb | 653 | reverse_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 GM |
654 | { |
655 | int i, j; | |
23b0200c | 656 | |
5f5c8ee5 GM |
657 | for (i = start, j = end - 1; i < j; ++i, --j) |
658 | { | |
659 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
660 | initialization. */ | |
661 | struct glyph_row temp; | |
662 | temp = matrix->rows[i]; | |
663 | matrix->rows[i] = matrix->rows[j]; | |
664 | matrix->rows[j] = temp; | |
665 | } | |
666 | } | |
23b0200c | 667 | |
23b0200c | 668 | |
5f5c8ee5 GM |
669 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
670 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
671 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
672 | row structures are moved around). | |
60a8948a | 673 | |
5f5c8ee5 GM |
674 | The algorithm used for rotating the vector was, I believe, first |
675 | described by Kernighan. See the vector R as consisting of two | |
676 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
677 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
678 | and reverse the result to get (ArBr)r which is BA. Similar for | |
679 | rotating right. */ | |
680 | ||
681 | void | |
971de7fb | 682 | rotate_matrix (struct glyph_matrix *matrix, int first, int last, int by) |
5f5c8ee5 GM |
683 | { |
684 | if (by < 0) | |
685 | { | |
686 | /* Up (rotate left, i.e. towards lower indices). */ | |
687 | by = -by; | |
688 | reverse_rows (matrix, first, first + by); | |
689 | reverse_rows (matrix, first + by, last); | |
690 | reverse_rows (matrix, first, last); | |
691 | } | |
692 | else if (by > 0) | |
693 | { | |
694 | /* Down (rotate right, i.e. towards higher indices). */ | |
695 | reverse_rows (matrix, last - by, last); | |
696 | reverse_rows (matrix, first, last - by); | |
697 | reverse_rows (matrix, first, last); | |
698 | } | |
699 | } | |
700 | ||
701 | ||
702 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
703 | with indices START <= index < END. Increment positions by DELTA/ | |
704 | DELTA_BYTES. */ | |
705 | ||
706 | void | |
ace1712c | 707 | increment_matrix_positions (struct glyph_matrix *matrix, int start, int end, |
d311d28c | 708 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
709 | { |
710 | /* Check that START and END are reasonable values. */ | |
a54e2c05 DA |
711 | eassert (start >= 0 && start <= matrix->nrows); |
712 | eassert (end >= 0 && end <= matrix->nrows); | |
713 | eassert (start <= end); | |
5f5c8ee5 GM |
714 | |
715 | for (; start < end; ++start) | |
86c11ba1 | 716 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
717 | } |
718 | ||
719 | ||
59ea14cd PE |
720 | /* Clear the enable_p flags in a range of rows in glyph matrix MATRIX. |
721 | START and END are the row indices of the first and last + 1 row to clear. */ | |
5f5c8ee5 GM |
722 | |
723 | void | |
59ea14cd | 724 | clear_glyph_matrix_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 | 725 | { |
a54e2c05 DA |
726 | eassert (start <= end); |
727 | eassert (start >= 0 && start < matrix->nrows); | |
728 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 729 | |
5f5c8ee5 | 730 | for (; start < end; ++start) |
59ea14cd | 731 | matrix->rows[start].enabled_p = 0; |
5f5c8ee5 GM |
732 | } |
733 | ||
734 | ||
735 | /* Clear MATRIX. | |
736 | ||
59ea14cd PE |
737 | Empty all rows in MATRIX by clearing their enabled_p flags. |
738 | The function prepare_desired_row will eventually really clear a row | |
739 | when it sees one with a false enabled_p flag. | |
5f5c8ee5 | 740 | |
59ea14cd | 741 | Reset update hints to default values. The only update hint |
5f5c8ee5 GM |
742 | currently present is the flag MATRIX->no_scrolling_p. */ |
743 | ||
744 | void | |
971de7fb | 745 | clear_glyph_matrix (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
746 | { |
747 | if (matrix) | |
748 | { | |
59ea14cd | 749 | clear_glyph_matrix_rows (matrix, 0, matrix->nrows); |
5f5c8ee5 GM |
750 | matrix->no_scrolling_p = 0; |
751 | } | |
752 | } | |
177c0ea7 | 753 | |
5f5c8ee5 GM |
754 | |
755 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
756 | Increment y-positions in glyph rows between START and END by DY, | |
757 | and recompute their visible height. */ | |
758 | ||
759 | void | |
971de7fb | 760 | shift_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int start, int end, int dy) |
5f5c8ee5 GM |
761 | { |
762 | int min_y, max_y; | |
177c0ea7 | 763 | |
a54e2c05 DA |
764 | eassert (start <= end); |
765 | eassert (start >= 0 && start < matrix->nrows); | |
766 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 767 | |
7df02016 KS |
768 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
769 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 770 | |
5f5c8ee5 GM |
771 | for (; start < end; ++start) |
772 | { | |
773 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 774 | |
5f5c8ee5 | 775 | row->y += dy; |
d6c747a4 | 776 | row->visible_height = row->height; |
177c0ea7 | 777 | |
5f5c8ee5 | 778 | if (row->y < min_y) |
d6c747a4 GM |
779 | row->visible_height -= min_y - row->y; |
780 | if (row->y + row->height > max_y) | |
781 | row->visible_height -= row->y + row->height - max_y; | |
e61124cd YM |
782 | if (row->fringe_bitmap_periodic_p) |
783 | row->redraw_fringe_bitmaps_p = 1; | |
5f5c8ee5 GM |
784 | } |
785 | } | |
786 | ||
787 | ||
788 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
789 | invalid is done by setting enabled_p to zero for all rows in a | |
790 | current matrix. */ | |
791 | ||
792 | void | |
971de7fb | 793 | clear_current_matrices (register struct frame *f) |
5f5c8ee5 GM |
794 | { |
795 | /* Clear frame current matrix, if we have one. */ | |
796 | if (f->current_matrix) | |
797 | clear_glyph_matrix (f->current_matrix); | |
798 | ||
5a49b79c | 799 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
800 | /* Clear the matrix of the menu bar window, if such a window exists. |
801 | The menu bar window is currently used to display menus on X when | |
802 | no toolkit support is compiled in. */ | |
e69b0960 DA |
803 | if (WINDOWP (f->menu_bar_window)) |
804 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
5a49b79c | 805 | #endif |
5f5c8ee5 | 806 | |
9ea173e8 | 807 | /* Clear the matrix of the tool-bar window, if any. */ |
e69b0960 DA |
808 | if (WINDOWP (f->tool_bar_window)) |
809 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
5f5c8ee5 GM |
810 | |
811 | /* Clear current window matrices. */ | |
a54e2c05 | 812 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
813 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); |
814 | } | |
815 | ||
816 | ||
817 | /* Clear out all display lines of F for a coming redisplay. */ | |
818 | ||
819 | void | |
971de7fb | 820 | clear_desired_matrices (register struct frame *f) |
5f5c8ee5 GM |
821 | { |
822 | if (f->desired_matrix) | |
823 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 824 | |
5a49b79c | 825 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
e69b0960 DA |
826 | if (WINDOWP (f->menu_bar_window)) |
827 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
5a49b79c | 828 | #endif |
5f5c8ee5 | 829 | |
e69b0960 DA |
830 | if (WINDOWP (f->tool_bar_window)) |
831 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
5f5c8ee5 GM |
832 | |
833 | /* Do it for window matrices. */ | |
a54e2c05 | 834 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
835 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); |
836 | } | |
837 | ||
838 | ||
59ea14cd PE |
839 | /* Clear matrices in window tree rooted in W. If DESIRED_P, |
840 | clear desired matrices, otherwise clear current matrices. */ | |
5f5c8ee5 GM |
841 | |
842 | static void | |
59ea14cd | 843 | clear_window_matrices (struct window *w, bool desired_p) |
5f5c8ee5 GM |
844 | { |
845 | while (w) | |
846 | { | |
e74aeda8 DA |
847 | if (WINDOWP (w->contents)) |
848 | clear_window_matrices (XWINDOW (w->contents), desired_p); | |
5f5c8ee5 GM |
849 | else |
850 | { | |
851 | if (desired_p) | |
852 | clear_glyph_matrix (w->desired_matrix); | |
853 | else | |
854 | { | |
855 | clear_glyph_matrix (w->current_matrix); | |
9d93ce29 | 856 | w->window_end_valid = 0; |
5f5c8ee5 GM |
857 | } |
858 | } | |
859 | ||
d3d50620 | 860 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
861 | } |
862 | } | |
863 | ||
864 | ||
865 | \f | |
866 | /*********************************************************************** | |
867 | Glyph Rows | |
868 | ||
869 | See dispextern.h for an overall explanation of glyph rows. | |
870 | ***********************************************************************/ | |
871 | ||
872 | /* Clear glyph row ROW. Do it in a way that makes it robust against | |
873 | changes in the glyph_row structure, i.e. addition or removal of | |
874 | structure members. */ | |
875 | ||
2cca872d KH |
876 | static struct glyph_row null_row; |
877 | ||
5f5c8ee5 | 878 | void |
971de7fb | 879 | clear_glyph_row (struct glyph_row *row) |
5f5c8ee5 GM |
880 | { |
881 | struct glyph *p[1 + LAST_AREA]; | |
5f5c8ee5 GM |
882 | |
883 | /* Save pointers. */ | |
884 | p[LEFT_MARGIN_AREA] = row->glyphs[LEFT_MARGIN_AREA]; | |
885 | p[TEXT_AREA] = row->glyphs[TEXT_AREA]; | |
886 | p[RIGHT_MARGIN_AREA] = row->glyphs[RIGHT_MARGIN_AREA]; | |
887 | p[LAST_AREA] = row->glyphs[LAST_AREA]; | |
888 | ||
889 | /* Clear. */ | |
890 | *row = null_row; | |
891 | ||
892 | /* Restore pointers. */ | |
893 | row->glyphs[LEFT_MARGIN_AREA] = p[LEFT_MARGIN_AREA]; | |
894 | row->glyphs[TEXT_AREA] = p[TEXT_AREA]; | |
895 | row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA]; | |
896 | row->glyphs[LAST_AREA] = p[LAST_AREA]; | |
45560b1a GM |
897 | |
898 | #if 0 /* At some point, some bit-fields of struct glyph were not set, | |
899 | which made glyphs unequal when compared with GLYPH_EQUAL_P. | |
900 | Redisplay outputs such glyphs, and flickering effects were | |
901 | the result. This also depended on the contents of memory | |
902 | returned by xmalloc. If flickering happens again, activate | |
153a073c | 903 | the code below. If the flickering is gone with that, chances |
45560b1a | 904 | are that the flickering has the same reason as here. */ |
72af86bd | 905 | memset (p[0], 0, (char *) p[LAST_AREA] - (char *) p[0]); |
45560b1a | 906 | #endif |
5f5c8ee5 GM |
907 | } |
908 | ||
909 | ||
910 | /* Make ROW an empty, enabled row of canonical character height, | |
911 | in window W starting at y-position Y. */ | |
912 | ||
913 | void | |
971de7fb | 914 | blank_row (struct window *w, struct glyph_row *row, int y) |
5f5c8ee5 GM |
915 | { |
916 | int min_y, max_y; | |
177c0ea7 | 917 | |
7df02016 KS |
918 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
919 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 920 | |
5f5c8ee5 GM |
921 | clear_glyph_row (row); |
922 | row->y = y; | |
408f5064 | 923 | row->ascent = row->phys_ascent = 0; |
d3d50620 | 924 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 925 | row->visible_height = row->height; |
177c0ea7 | 926 | |
5f5c8ee5 | 927 | if (row->y < min_y) |
d6c747a4 GM |
928 | row->visible_height -= min_y - row->y; |
929 | if (row->y + row->height > max_y) | |
930 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
931 | |
932 | row->enabled_p = 1; | |
933 | } | |
934 | ||
935 | ||
936 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
937 | are the amounts by which to change positions. Note that the first | |
938 | glyph of the text area of a row can have a buffer position even if | |
939 | the used count of the text area is zero. Such rows display line | |
940 | ends. */ | |
941 | ||
5bf46f05 | 942 | static void |
ace1712c | 943 | increment_row_positions (struct glyph_row *row, |
d311d28c | 944 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
945 | { |
946 | int area, i; | |
947 | ||
948 | /* Increment start and end positions. */ | |
949 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
950 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
951 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
952 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
d36fe237 EZ |
953 | CHARPOS (row->start.pos) += delta; |
954 | BYTEPOS (row->start.pos) += delta_bytes; | |
955 | CHARPOS (row->end.pos) += delta; | |
956 | BYTEPOS (row->end.pos) += delta_bytes; | |
5f5c8ee5 | 957 | |
5cacdcfd KS |
958 | if (!row->enabled_p) |
959 | return; | |
960 | ||
5f5c8ee5 GM |
961 | /* Increment positions in glyphs. */ |
962 | for (area = 0; area < LAST_AREA; ++area) | |
963 | for (i = 0; i < row->used[area]; ++i) | |
964 | if (BUFFERP (row->glyphs[area][i].object) | |
965 | && row->glyphs[area][i].charpos > 0) | |
966 | row->glyphs[area][i].charpos += delta; | |
967 | ||
968 | /* Capture the case of rows displaying a line end. */ | |
969 | if (row->used[TEXT_AREA] == 0 | |
970 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
971 | row->glyphs[TEXT_AREA]->charpos += delta; | |
972 | } | |
973 | ||
974 | ||
9af3e742 | 975 | #if 0 |
5f5c8ee5 GM |
976 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
977 | contents, i.e. glyph structure contents are exchanged between A and | |
978 | B without changing glyph pointers in A and B. */ | |
979 | ||
980 | static void | |
1dae0f0a | 981 | swap_glyphs_in_rows (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
982 | { |
983 | int area; | |
984 | ||
985 | for (area = 0; area < LAST_AREA; ++area) | |
986 | { | |
987 | /* Number of glyphs to swap. */ | |
988 | int max_used = max (a->used[area], b->used[area]); | |
989 | ||
990 | /* Start of glyphs in area of row A. */ | |
991 | struct glyph *glyph_a = a->glyphs[area]; | |
992 | ||
993 | /* End + 1 of glyphs in area of row A. */ | |
994 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
995 | ||
996 | /* Start of glyphs in area of row B. */ | |
997 | struct glyph *glyph_b = b->glyphs[area]; | |
998 | ||
999 | while (glyph_a < glyph_a_end) | |
1000 | { | |
1001 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
1002 | initialization. */ | |
1003 | struct glyph temp; | |
1004 | temp = *glyph_a; | |
1005 | *glyph_a = *glyph_b; | |
1006 | *glyph_b = temp; | |
1007 | ++glyph_a; | |
1008 | ++glyph_b; | |
1009 | } | |
1010 | } | |
1011 | } | |
1012 | ||
9af3e742 | 1013 | #endif /* 0 */ |
5f5c8ee5 | 1014 | |
015137db EZ |
1015 | /* Exchange pointers to glyph memory between glyph rows A and B. Also |
1016 | exchange the used[] array and the hash values of the rows, because | |
1017 | these should all go together for the row's hash value to be | |
1018 | correct. */ | |
5f5c8ee5 | 1019 | |
b0ab8123 | 1020 | static void |
971de7fb | 1021 | swap_glyph_pointers (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1022 | { |
1023 | int i; | |
015137db EZ |
1024 | unsigned hash_tem = a->hash; |
1025 | ||
5f5c8ee5 GM |
1026 | for (i = 0; i < LAST_AREA + 1; ++i) |
1027 | { | |
1028 | struct glyph *temp = a->glyphs[i]; | |
015137db | 1029 | |
5f5c8ee5 GM |
1030 | a->glyphs[i] = b->glyphs[i]; |
1031 | b->glyphs[i] = temp; | |
73055685 EZ |
1032 | if (i < LAST_AREA) |
1033 | { | |
1034 | short used_tem = a->used[i]; | |
1035 | ||
1036 | a->used[i] = b->used[i]; | |
1037 | b->used[i] = used_tem; | |
1038 | } | |
5f5c8ee5 | 1039 | } |
015137db EZ |
1040 | a->hash = b->hash; |
1041 | b->hash = hash_tem; | |
5f5c8ee5 GM |
1042 | } |
1043 | ||
1044 | ||
1045 | /* Copy glyph row structure FROM to glyph row structure TO, except | |
015137db EZ |
1046 | that glyph pointers, the `used' counts, and the hash values in the |
1047 | structures are left unchanged. */ | |
5f5c8ee5 | 1048 | |
b0ab8123 | 1049 | static void |
971de7fb | 1050 | copy_row_except_pointers (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1051 | { |
1052 | struct glyph *pointers[1 + LAST_AREA]; | |
73055685 | 1053 | short used[LAST_AREA]; |
015137db | 1054 | unsigned hashval; |
5f5c8ee5 GM |
1055 | |
1056 | /* Save glyph pointers of TO. */ | |
72af86bd | 1057 | memcpy (pointers, to->glyphs, sizeof to->glyphs); |
015137db EZ |
1058 | memcpy (used, to->used, sizeof to->used); |
1059 | hashval = to->hash; | |
5f5c8ee5 GM |
1060 | |
1061 | /* Do a structure assignment. */ | |
1062 | *to = *from; | |
1063 | ||
1064 | /* Restore original pointers of TO. */ | |
72af86bd | 1065 | memcpy (to->glyphs, pointers, sizeof to->glyphs); |
015137db EZ |
1066 | memcpy (to->used, used, sizeof to->used); |
1067 | to->hash = hashval; | |
5f5c8ee5 GM |
1068 | } |
1069 | ||
1070 | ||
5f5c8ee5 GM |
1071 | /* Assign glyph row FROM to glyph row TO. This works like a structure |
1072 | assignment TO = FROM, except that glyph pointers are not copied but | |
1073 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1074 | a memory leak. */ | |
1075 | ||
b0ab8123 | 1076 | static void |
971de7fb | 1077 | assign_row (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1078 | { |
1079 | swap_glyph_pointers (to, from); | |
1080 | copy_row_except_pointers (to, from); | |
1081 | } | |
1082 | ||
1083 | ||
1084 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1085 | a row in a window matrix, is a slice of the glyph memory of the | |
1086 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
59ea14cd | 1087 | is true if the glyph memory of WINDOW_ROW is part of the glyph |
5f5c8ee5 GM |
1088 | memory of FRAME_ROW. */ |
1089 | ||
e509cfa6 | 1090 | #ifdef GLYPH_DEBUG |
9339e87f | 1091 | |
59ea14cd | 1092 | static bool |
59fc5cf9 | 1093 | glyph_row_slice_p (struct glyph_row *window_row, struct glyph_row *frame_row) |
5f5c8ee5 GM |
1094 | { |
1095 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1096 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1097 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1098 | ||
1099 | return (frame_glyph_start <= window_glyph_start | |
1100 | && window_glyph_start < frame_glyph_end); | |
1101 | } | |
1102 | ||
9339e87f | 1103 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1104 | |
9af3e742 GM |
1105 | #if 0 |
1106 | ||
5f5c8ee5 GM |
1107 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1108 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1109 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1110 | ||
1111 | static struct glyph_row * | |
59fc5cf9 AS |
1112 | find_glyph_row_slice (struct glyph_matrix *window_matrix, |
1113 | struct glyph_matrix *frame_matrix, int row) | |
5f5c8ee5 GM |
1114 | { |
1115 | int i; | |
1116 | ||
a54e2c05 | 1117 | eassert (row >= 0 && row < frame_matrix->nrows); |
5f5c8ee5 GM |
1118 | |
1119 | for (i = 0; i < window_matrix->nrows; ++i) | |
1120 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1121 | frame_matrix->rows + row)) | |
1122 | break; | |
1123 | ||
1124 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1125 | } | |
1126 | ||
9af3e742 | 1127 | #endif /* 0 */ |
5f5c8ee5 GM |
1128 | |
1129 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1130 | i.e. they are only marked as to be cleared by setting their | |
1131 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1132 | call to this function really clears it. */ | |
1133 | ||
1134 | void | |
971de7fb | 1135 | prepare_desired_row (struct glyph_row *row) |
5f5c8ee5 GM |
1136 | { |
1137 | if (!row->enabled_p) | |
1138 | { | |
59ea14cd | 1139 | bool rp = row->reversed_p; |
5009f85e | 1140 | |
5f5c8ee5 GM |
1141 | clear_glyph_row (row); |
1142 | row->enabled_p = 1; | |
5009f85e | 1143 | row->reversed_p = rp; |
5f5c8ee5 GM |
1144 | } |
1145 | } | |
1146 | ||
1147 | ||
1148 | /* Return a hash code for glyph row ROW. */ | |
1149 | ||
2f7c71a1 | 1150 | static int |
971de7fb | 1151 | line_hash_code (struct glyph_row *row) |
5f5c8ee5 GM |
1152 | { |
1153 | int hash = 0; | |
177c0ea7 | 1154 | |
5f5c8ee5 GM |
1155 | if (row->enabled_p) |
1156 | { | |
4cecaab8 MB |
1157 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1158 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1159 | ||
1160 | while (glyph < end) | |
1161 | { | |
1162 | int c = glyph->u.ch; | |
1163 | int face_id = glyph->face_id; | |
daf01701 | 1164 | if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
4cecaab8 MB |
1165 | c -= SPACEGLYPH; |
1166 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1167 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1168 | ++glyph; | |
1169 | } | |
5f5c8ee5 | 1170 | |
4cecaab8 MB |
1171 | if (hash == 0) |
1172 | hash = 1; | |
5f5c8ee5 GM |
1173 | } |
1174 | ||
1175 | return hash; | |
1176 | } | |
1177 | ||
1178 | ||
153a073c | 1179 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1180 | the number of characters in the line. If must_write_spaces is |
1181 | zero, leading and trailing spaces are ignored. */ | |
1182 | ||
dfd153ae | 1183 | static int |
971de7fb | 1184 | line_draw_cost (struct glyph_matrix *matrix, int vpos) |
5f5c8ee5 GM |
1185 | { |
1186 | struct glyph_row *row = matrix->rows + vpos; | |
1187 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1188 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1189 | int len; | |
1190 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
ca9ce8f2 | 1191 | ptrdiff_t glyph_table_len = GLYPH_TABLE_LENGTH; |
5f5c8ee5 GM |
1192 | |
1193 | /* Ignore trailing and leading spaces if we can. */ | |
daf01701 | 1194 | if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
5f5c8ee5 GM |
1195 | { |
1196 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1197 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1198 | --end; |
1199 | ||
177c0ea7 | 1200 | /* All blank line. */ |
5f5c8ee5 GM |
1201 | if (end == beg) |
1202 | return 0; | |
1203 | ||
1204 | /* Skip over leading spaces. */ | |
1205 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1206 | ++beg; | |
1207 | } | |
1208 | ||
1209 | /* If we don't have a glyph-table, each glyph is one character, | |
1210 | so return the number of glyphs. */ | |
1211 | if (glyph_table_base == 0) | |
1212 | len = end - beg; | |
1213 | else | |
1214 | { | |
1215 | /* Otherwise, scan the glyphs and accumulate their total length | |
1216 | in LEN. */ | |
1217 | len = 0; | |
1218 | while (beg < end) | |
1219 | { | |
3fc809e2 | 1220 | GLYPH g; |
177c0ea7 | 1221 | |
3fc809e2 KS |
1222 | SET_GLYPH_FROM_CHAR_GLYPH (g, *beg); |
1223 | ||
565b39a8 | 1224 | if (GLYPH_INVALID_P (g) |
42186983 | 1225 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) |
5f5c8ee5 GM |
1226 | len += 1; |
1227 | else | |
1228 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1229 | |
5f5c8ee5 GM |
1230 | ++beg; |
1231 | } | |
1232 | } | |
177c0ea7 | 1233 | |
5f5c8ee5 GM |
1234 | return len; |
1235 | } | |
1236 | ||
1237 | ||
59ea14cd PE |
1238 | /* Return true if the glyph rows A and B have equal contents. |
1239 | MOUSE_FACE_P means compare the mouse_face_p flags of A and B, too. */ | |
5f5c8ee5 | 1240 | |
b0ab8123 | 1241 | static bool |
59ea14cd | 1242 | row_equal_p (struct glyph_row *a, struct glyph_row *b, bool mouse_face_p) |
5f5c8ee5 | 1243 | { |
a54e2c05 DA |
1244 | eassert (verify_row_hash (a)); |
1245 | eassert (verify_row_hash (b)); | |
7a7270dd | 1246 | |
5f5c8ee5 GM |
1247 | if (a == b) |
1248 | return 1; | |
1249 | else if (a->hash != b->hash) | |
1250 | return 0; | |
1251 | else | |
1252 | { | |
1253 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1254 | int area; | |
1255 | ||
e4e0bee9 GM |
1256 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1257 | return 0; | |
1258 | ||
5f5c8ee5 GM |
1259 | /* Compare glyphs. */ |
1260 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1261 | { | |
1262 | if (a->used[area] != b->used[area]) | |
1263 | return 0; | |
177c0ea7 | 1264 | |
5f5c8ee5 GM |
1265 | a_glyph = a->glyphs[area]; |
1266 | a_end = a_glyph + a->used[area]; | |
1267 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1268 | |
5f5c8ee5 GM |
1269 | while (a_glyph < a_end |
1270 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1271 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1272 | |
5f5c8ee5 GM |
1273 | if (a_glyph != a_end) |
1274 | return 0; | |
1275 | } | |
1276 | ||
6b61353c KH |
1277 | if (a->fill_line_p != b->fill_line_p |
1278 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1279 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
1280 | || a->left_fringe_face_id != b->left_fringe_face_id | |
e61124cd | 1281 | || a->left_fringe_offset != b->left_fringe_offset |
6b61353c KH |
1282 | || a->right_fringe_bitmap != b->right_fringe_bitmap |
1283 | || a->right_fringe_face_id != b->right_fringe_face_id | |
e61124cd YM |
1284 | || a->right_fringe_offset != b->right_fringe_offset |
1285 | || a->fringe_bitmap_periodic_p != b->fringe_bitmap_periodic_p | |
3d4a365f | 1286 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
6b61353c | 1287 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1288 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1289 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1290 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
918f4159 | 1291 | || a->reversed_p != b->reversed_p |
5f5c8ee5 GM |
1292 | /* Different partially visible characters on left margin. */ |
1293 | || a->x != b->x | |
1294 | /* Different height. */ | |
1295 | || a->ascent != b->ascent | |
408f5064 GM |
1296 | || a->phys_ascent != b->phys_ascent |
1297 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1298 | || a->visible_height != b->visible_height) |
1299 | return 0; | |
1300 | } | |
1301 | ||
1302 | return 1; | |
1303 | } | |
1304 | ||
1305 | ||
1306 | \f | |
1307 | /*********************************************************************** | |
1308 | Glyph Pool | |
1309 | ||
1310 | See dispextern.h for an overall explanation of glyph pools. | |
1311 | ***********************************************************************/ | |
1312 | ||
1313 | /* Allocate a glyph_pool structure. The structure returned is | |
1314 | initialized with zeros. The global variable glyph_pool_count is | |
1315 | incremented for each pool allocated. */ | |
1316 | ||
1317 | static struct glyph_pool * | |
971de7fb | 1318 | new_glyph_pool (void) |
5f5c8ee5 | 1319 | { |
23f86fce | 1320 | struct glyph_pool *result = xzalloc (sizeof *result); |
177c0ea7 | 1321 | |
5f5c8ee5 GM |
1322 | /* For memory leak and double deletion checking. */ |
1323 | ++glyph_pool_count; | |
177c0ea7 | 1324 | |
5f5c8ee5 GM |
1325 | return result; |
1326 | } | |
1327 | ||
1328 | ||
1329 | /* Free a glyph_pool structure POOL. The function may be called with | |
1330 | a null POOL pointer. The global variable glyph_pool_count is | |
1331 | decremented with every pool structure freed. If this count gets | |
1332 | negative, more structures were freed than allocated, i.e. one | |
1333 | structure must have been freed more than once or a bogus pointer | |
1334 | was passed to free_glyph_pool. */ | |
1335 | ||
1336 | static void | |
971de7fb | 1337 | free_glyph_pool (struct glyph_pool *pool) |
5f5c8ee5 GM |
1338 | { |
1339 | if (pool) | |
1340 | { | |
153a073c | 1341 | /* More freed than allocated? */ |
5f5c8ee5 | 1342 | --glyph_pool_count; |
a54e2c05 | 1343 | eassert (glyph_pool_count >= 0); |
5f5c8ee5 GM |
1344 | |
1345 | xfree (pool->glyphs); | |
1346 | xfree (pool); | |
1347 | } | |
1348 | } | |
1349 | ||
1350 | ||
1351 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1352 | columns we need. This function never shrinks a pool. The only | |
1353 | case in which this would make sense, would be when a frame's size | |
1354 | is changed from a large value to a smaller one. But, if someone | |
1355 | does it once, we can expect that he will do it again. | |
1356 | ||
59ea14cd | 1357 | Return true if the pool changed in a way which makes |
5f5c8ee5 GM |
1358 | re-adjusting window glyph matrices necessary. */ |
1359 | ||
59ea14cd | 1360 | static bool |
971de7fb | 1361 | realloc_glyph_pool (struct glyph_pool *pool, struct dim matrix_dim) |
5f5c8ee5 | 1362 | { |
ca9ce8f2 | 1363 | ptrdiff_t needed; |
59ea14cd | 1364 | bool changed_p; |
5f5c8ee5 GM |
1365 | |
1366 | changed_p = (pool->glyphs == 0 | |
1367 | || matrix_dim.height != pool->nrows | |
1368 | || matrix_dim.width != pool->ncolumns); | |
1369 | ||
1370 | /* Enlarge the glyph pool. */ | |
ca9ce8f2 | 1371 | needed = matrix_dim.width; |
0065d054 PE |
1372 | if (INT_MULTIPLY_OVERFLOW (needed, matrix_dim.height)) |
1373 | memory_full (SIZE_MAX); | |
ca9ce8f2 | 1374 | needed *= matrix_dim.height; |
5f5c8ee5 GM |
1375 | if (needed > pool->nglyphs) |
1376 | { | |
0065d054 PE |
1377 | ptrdiff_t old_nglyphs = pool->nglyphs; |
1378 | pool->glyphs = xpalloc (pool->glyphs, &pool->nglyphs, | |
1379 | needed - old_nglyphs, -1, sizeof *pool->glyphs); | |
1380 | memset (pool->glyphs + old_nglyphs, 0, | |
1381 | (pool->nglyphs - old_nglyphs) * sizeof *pool->glyphs); | |
5f5c8ee5 GM |
1382 | } |
1383 | ||
153a073c | 1384 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1385 | to do sanity checks, and (b) the number of columns determines |
1386 | where rows in the frame matrix start---this must be available to | |
1387 | determine pointers to rows of window sub-matrices. */ | |
1388 | pool->nrows = matrix_dim.height; | |
1389 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1390 | |
5f5c8ee5 GM |
1391 | return changed_p; |
1392 | } | |
1393 | ||
1394 | ||
1395 | \f | |
1396 | /*********************************************************************** | |
1397 | Debug Code | |
1398 | ***********************************************************************/ | |
1399 | ||
e509cfa6 | 1400 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 1401 | |
a13396c9 | 1402 | |
28d440ab KL |
1403 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1404 | XXX Maybe this should be changed to flush the current terminal instead of | |
1405 | stdout. | |
1406 | */ | |
a13396c9 | 1407 | |
85fece3e PE |
1408 | void flush_stdout (void) EXTERNALLY_VISIBLE; |
1409 | ||
a13396c9 | 1410 | void |
59fc5cf9 | 1411 | flush_stdout (void) |
a13396c9 GM |
1412 | { |
1413 | fflush (stdout); | |
1414 | } | |
1415 | ||
1416 | ||
5f5c8ee5 GM |
1417 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1418 | pointer has been lost, e.g. by using a structure assignment between | |
1419 | rows, at least one pointer must occur more than once in the rows of | |
1420 | MATRIX. */ | |
1421 | ||
1422 | void | |
59fc5cf9 | 1423 | check_matrix_pointer_lossage (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
1424 | { |
1425 | int i, j; | |
177c0ea7 | 1426 | |
5f5c8ee5 GM |
1427 | for (i = 0; i < matrix->nrows; ++i) |
1428 | for (j = 0; j < matrix->nrows; ++j) | |
a54e2c05 | 1429 | eassert (i == j |
5f5c8ee5 GM |
1430 | || (matrix->rows[i].glyphs[TEXT_AREA] |
1431 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1432 | } | |
1433 | ||
1434 | ||
1435 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1436 | ||
1437 | struct glyph_row * | |
59fc5cf9 | 1438 | matrix_row (struct glyph_matrix *matrix, int row) |
5f5c8ee5 | 1439 | { |
a54e2c05 DA |
1440 | eassert (matrix && matrix->rows); |
1441 | eassert (row >= 0 && row < matrix->nrows); | |
5f5c8ee5 GM |
1442 | |
1443 | /* That's really too slow for normal testing because this function | |
1444 | is called almost everywhere. Although---it's still astonishingly | |
1445 | fast, so it is valuable to have for debugging purposes. */ | |
1446 | #if 0 | |
1447 | check_matrix_pointer_lossage (matrix); | |
1448 | #endif | |
177c0ea7 | 1449 | |
5f5c8ee5 GM |
1450 | return matrix->rows + row; |
1451 | } | |
1452 | ||
1453 | ||
1454 | #if 0 /* This function makes invalid assumptions when text is | |
1455 | partially invisible. But it might come handy for debugging | |
1456 | nevertheless. */ | |
1457 | ||
1458 | /* Check invariants that must hold for an up to date current matrix of | |
1459 | window W. */ | |
1460 | ||
1461 | static void | |
59fc5cf9 | 1462 | check_matrix_invariants (struct window *w) |
5f5c8ee5 GM |
1463 | { |
1464 | struct glyph_matrix *matrix = w->current_matrix; | |
1465 | int yb = window_text_bottom_y (w); | |
1466 | struct glyph_row *row = matrix->rows; | |
1467 | struct glyph_row *last_text_row = NULL; | |
1468 | struct buffer *saved = current_buffer; | |
e74aeda8 | 1469 | struct buffer *buffer = XBUFFER (w->contents); |
5f5c8ee5 | 1470 | int c; |
177c0ea7 | 1471 | |
5f5c8ee5 GM |
1472 | /* This can sometimes happen for a fresh window. */ |
1473 | if (matrix->nrows < 2) | |
1474 | return; | |
1475 | ||
1476 | set_buffer_temp (buffer); | |
1477 | ||
1478 | /* Note: last row is always reserved for the mode line. */ | |
1479 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1480 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1481 | { | |
1482 | struct glyph_row *next = row + 1; | |
1483 | ||
1484 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1485 | last_text_row = row; | |
1486 | ||
1487 | /* Check that character and byte positions are in sync. */ | |
a54e2c05 | 1488 | eassert (MATRIX_ROW_START_BYTEPOS (row) |
5f5c8ee5 | 1489 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); |
a54e2c05 | 1490 | eassert (BYTEPOS (row->start.pos) |
d36fe237 | 1491 | == CHAR_TO_BYTE (CHARPOS (row->start.pos))); |
5f5c8ee5 GM |
1492 | |
1493 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1494 | have such a position temporarily in case of a minibuffer | |
1495 | displaying something like `[Sole completion]' at its end. */ | |
1496 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
d36fe237 | 1497 | { |
a54e2c05 | 1498 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
d36fe237 | 1499 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); |
a54e2c05 | 1500 | eassert (BYTEPOS (row->end.pos) |
d36fe237 EZ |
1501 | == CHAR_TO_BYTE (CHARPOS (row->end.pos))); |
1502 | } | |
5f5c8ee5 GM |
1503 | |
1504 | /* Check that end position of `row' is equal to start position | |
1505 | of next row. */ | |
1506 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1507 | { | |
a54e2c05 | 1508 | eassert (MATRIX_ROW_END_CHARPOS (row) |
5f5c8ee5 | 1509 | == MATRIX_ROW_START_CHARPOS (next)); |
a54e2c05 | 1510 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
5f5c8ee5 | 1511 | == MATRIX_ROW_START_BYTEPOS (next)); |
a54e2c05 DA |
1512 | eassert (CHARPOS (row->end.pos) == CHARPOS (next->start.pos)); |
1513 | eassert (BYTEPOS (row->end.pos) == BYTEPOS (next->start.pos)); | |
5f5c8ee5 GM |
1514 | } |
1515 | row = next; | |
1516 | } | |
1517 | ||
a54e2c05 DA |
1518 | eassert (w->current_matrix->nrows == w->desired_matrix->nrows); |
1519 | eassert (w->desired_matrix->rows != NULL); | |
5f5c8ee5 GM |
1520 | set_buffer_temp (saved); |
1521 | } | |
1522 | ||
1523 | #endif /* 0 */ | |
1524 | ||
e509cfa6 | 1525 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
1526 | |
1527 | ||
1528 | \f | |
1529 | /********************************************************************** | |
1530 | Allocating/ Adjusting Glyph Matrices | |
1531 | **********************************************************************/ | |
1532 | ||
1533 | /* Allocate glyph matrices over a window tree for a frame-based | |
1534 | redisplay | |
1535 | ||
1536 | X and Y are column/row within the frame glyph matrix where | |
1537 | sub-matrices for the window tree rooted at WINDOW must be | |
59ea14cd | 1538 | allocated. DIM_ONLY_P means that the caller of this |
8ce2650d YM |
1539 | function is only interested in the result matrix dimension, and |
1540 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1541 | |
1542 | The function returns the total width/height of the sub-matrices of | |
1543 | the window tree. If called on a frame root window, the computation | |
1544 | will take the mini-buffer window into account. | |
1545 | ||
1546 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1547 | ||
1548 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1549 | glyph matrices yet, and | |
1550 | ||
1551 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1552 | any window in the tree will be changed or have been changed (see | |
153a073c | 1553 | DIM_ONLY_P) |
5f5c8ee5 GM |
1554 | |
1555 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1556 | function. | |
1557 | ||
1558 | Windows are arranged into chains of windows on the same level | |
1559 | through the next fields of window structures. Such a level can be | |
1560 | either a sequence of horizontally adjacent windows from left to | |
1561 | right, or a sequence of vertically adjacent windows from top to | |
1562 | bottom. Each window in a horizontal sequence can be either a leaf | |
1563 | window or a vertical sequence; a window in a vertical sequence can | |
1564 | be either a leaf or a horizontal sequence. All windows in a | |
1565 | horizontal sequence have the same height, and all windows in a | |
1566 | vertical sequence have the same width. | |
1567 | ||
1568 | This function uses, for historical reasons, a more general | |
1569 | algorithm to determine glyph matrix dimensions that would be | |
1570 | necessary. | |
1571 | ||
1572 | The matrix height of a horizontal sequence is determined by the | |
1573 | maximum height of any matrix in the sequence. The matrix width of | |
1574 | a horizontal sequence is computed by adding up matrix widths of | |
1575 | windows in the sequence. | |
1576 | ||
1577 | |<------- result width ------->| | |
1578 | +---------+----------+---------+ --- | |
1579 | | | | | | | |
1580 | | | | | | |
1581 | +---------+ | | result height | |
1582 | | +---------+ | |
1583 | | | | | |
1584 | +----------+ --- | |
1585 | ||
1586 | The matrix width of a vertical sequence is the maximum matrix width | |
1587 | of any window in the sequence. Its height is computed by adding up | |
1588 | matrix heights of windows in the sequence. | |
1589 | ||
1590 | |<---- result width -->| | |
1591 | +---------+ --- | |
1592 | | | | | |
1593 | | | | | |
1594 | +---------+--+ | | |
1595 | | | | | |
1596 | | | result height | |
1597 | | | | |
1598 | +------------+---------+ | | |
1599 | | | | | |
1600 | | | | | |
1601 | +------------+---------+ --- */ | |
1602 | ||
1603 | /* Bit indicating that a new matrix will be allocated or has been | |
1604 | allocated. */ | |
1605 | ||
1606 | #define NEW_LEAF_MATRIX (1 << 0) | |
1607 | ||
1608 | /* Bit indicating that a matrix will or has changed its location or | |
1609 | size. */ | |
1610 | ||
1611 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1612 | ||
1613 | static struct dim | |
6f704c76 | 1614 | allocate_matrices_for_frame_redisplay (Lisp_Object window, int x, int y, |
59ea14cd | 1615 | bool dim_only_p, int *window_change_flags) |
5f5c8ee5 GM |
1616 | { |
1617 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1618 | int x0 = x, y0 = y; | |
1619 | int wmax = 0, hmax = 0; | |
1620 | struct dim total; | |
1621 | struct dim dim; | |
1622 | struct window *w; | |
59ea14cd | 1623 | bool in_horz_combination_p; |
5f5c8ee5 GM |
1624 | |
1625 | /* What combination is WINDOW part of? Compute this once since the | |
1626 | result is the same for all windows in the `next' chain. The | |
1627 | special case of a root window (parent equal to nil) is treated | |
1628 | like a vertical combination because a root window's `next' | |
1629 | points to the mini-buffer window, if any, which is arranged | |
1630 | vertically below other windows. */ | |
1631 | in_horz_combination_p | |
d3d50620 | 1632 | = (!NILP (XWINDOW (window)->parent) |
e74aeda8 | 1633 | && WINDOW_HORIZONTAL_COMBINATION_P (XWINDOW (XWINDOW (window)->parent))); |
5f5c8ee5 GM |
1634 | |
1635 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1636 | do |
5f5c8ee5 GM |
1637 | { |
1638 | w = XWINDOW (window); | |
1639 | ||
1640 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1641 | on whether this is a combination or a leaf window. */ |
e74aeda8 DA |
1642 | if (WINDOWP (w->contents)) |
1643 | dim = allocate_matrices_for_frame_redisplay (w->contents, x, y, | |
5f5c8ee5 GM |
1644 | dim_only_p, |
1645 | window_change_flags); | |
1646 | else | |
1647 | { | |
1648 | /* If not already done, allocate sub-matrix structures. */ | |
1649 | if (w->desired_matrix == NULL) | |
1650 | { | |
1651 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1652 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1653 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1654 | } | |
177c0ea7 | 1655 | |
5f5c8ee5 GM |
1656 | /* Width and height MUST be chosen so that there are no |
1657 | holes in the frame matrix. */ | |
5d3cc43c GM |
1658 | dim.width = required_matrix_width (w); |
1659 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1660 | |
1661 | /* Will matrix be re-allocated? */ | |
1662 | if (x != w->desired_matrix->matrix_x | |
1663 | || y != w->desired_matrix->matrix_y | |
1664 | || dim.width != w->desired_matrix->matrix_w | |
1665 | || dim.height != w->desired_matrix->matrix_h | |
1666 | || (margin_glyphs_to_reserve (w, dim.width, | |
d3d50620 | 1667 | w->left_margin_cols) |
5f5c8ee5 GM |
1668 | != w->desired_matrix->left_margin_glyphs) |
1669 | || (margin_glyphs_to_reserve (w, dim.width, | |
d3d50620 | 1670 | w->right_margin_cols) |
5f5c8ee5 GM |
1671 | != w->desired_matrix->right_margin_glyphs)) |
1672 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1673 | ||
1674 | /* Actually change matrices, if allowed. Do not consider | |
1675 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1676 | may have been changed which we don't now here. We trust | |
59ea14cd | 1677 | that we only will be called with DIM_ONLY_P when |
5f5c8ee5 GM |
1678 | necessary. */ |
1679 | if (!dim_only_p) | |
1680 | { | |
1681 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1682 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1683 | } | |
1684 | } | |
1685 | ||
1686 | /* If we are part of a horizontal combination, advance x for | |
1687 | windows to the right of W; otherwise advance y for windows | |
1688 | below W. */ | |
1689 | if (in_horz_combination_p) | |
1690 | x += dim.width; | |
177c0ea7 | 1691 | else |
5f5c8ee5 GM |
1692 | y += dim.height; |
1693 | ||
1694 | /* Remember maximum glyph matrix dimensions. */ | |
1695 | wmax = max (wmax, dim.width); | |
1696 | hmax = max (hmax, dim.height); | |
1697 | ||
1698 | /* Next window on same level. */ | |
d3d50620 | 1699 | window = w->next; |
5f5c8ee5 GM |
1700 | } |
1701 | while (!NILP (window)); | |
1702 | ||
1703 | /* Set `total' to the total glyph matrix dimension of this window | |
1704 | level. In a vertical combination, the width is the width of the | |
1705 | widest window; the height is the y we finally reached, corrected | |
1706 | by the y we started with. In a horizontal combination, the total | |
1707 | height is the height of the tallest window, and the width is the | |
1708 | x we finally reached, corrected by the x we started with. */ | |
1709 | if (in_horz_combination_p) | |
1710 | { | |
1711 | total.width = x - x0; | |
1712 | total.height = hmax; | |
1713 | } | |
177c0ea7 | 1714 | else |
5f5c8ee5 GM |
1715 | { |
1716 | total.width = wmax; | |
1717 | total.height = y - y0; | |
1718 | } | |
1719 | ||
1720 | return total; | |
1721 | } | |
1722 | ||
1723 | ||
5d3cc43c GM |
1724 | /* Return the required height of glyph matrices for window W. */ |
1725 | ||
2f7c71a1 | 1726 | static int |
971de7fb | 1727 | required_matrix_height (struct window *w) |
5d3cc43c GM |
1728 | { |
1729 | #ifdef HAVE_WINDOW_SYSTEM | |
d3d50620 | 1730 | struct frame *f = XFRAME (w->frame); |
177c0ea7 | 1731 | |
5d3cc43c GM |
1732 | if (FRAME_WINDOW_P (f)) |
1733 | { | |
1734 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1ea40aa2 | 1735 | int window_pixel_height = window_box_height (w) + eabs (w->vscroll); |
5d3cc43c | 1736 | return (((window_pixel_height + ch_height - 1) |
cc834cf9 | 1737 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
1738 | /* One partially visible line at the top and |
1739 | bottom of the window. */ | |
1740 | + 2 | |
153a073c | 1741 | /* 2 for header and mode line. */ |
5d3cc43c GM |
1742 | + 2); |
1743 | } | |
1744 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 1745 | |
7df02016 | 1746 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
1747 | } |
1748 | ||
1749 | ||
1750 | /* Return the required width of glyph matrices for window W. */ | |
1751 | ||
2f7c71a1 | 1752 | static int |
971de7fb | 1753 | required_matrix_width (struct window *w) |
5d3cc43c GM |
1754 | { |
1755 | #ifdef HAVE_WINDOW_SYSTEM | |
d3d50620 | 1756 | struct frame *f = XFRAME (w->frame); |
5d3cc43c GM |
1757 | if (FRAME_WINDOW_P (f)) |
1758 | { | |
1759 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 1760 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 1761 | |
5d3cc43c GM |
1762 | /* Compute number of glyphs needed in a glyph row. */ |
1763 | return (((window_pixel_width + ch_width - 1) | |
cc834cf9 | 1764 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
1765 | /* 2 partially visible columns in the text area. */ |
1766 | + 2 | |
1767 | /* One partially visible column at the right | |
1768 | edge of each marginal area. */ | |
1769 | + 1 + 1); | |
1770 | } | |
1771 | #endif /* HAVE_WINDOW_SYSTEM */ | |
1772 | ||
5f24fa51 | 1773 | return w->total_cols; |
5d3cc43c GM |
1774 | } |
1775 | ||
1776 | ||
5f5c8ee5 | 1777 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 1778 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 1779 | |
5f5c8ee5 | 1780 | static void |
971de7fb | 1781 | allocate_matrices_for_window_redisplay (struct window *w) |
5f5c8ee5 | 1782 | { |
5f5c8ee5 GM |
1783 | while (w) |
1784 | { | |
e74aeda8 DA |
1785 | if (WINDOWP (w->contents)) |
1786 | allocate_matrices_for_window_redisplay (XWINDOW (w->contents)); | |
5f5c8ee5 GM |
1787 | else |
1788 | { | |
1789 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
1790 | struct dim dim; |
1791 | ||
1792 | /* If matrices are not yet allocated, allocate them now. */ | |
1793 | if (w->desired_matrix == NULL) | |
1794 | { | |
1795 | w->desired_matrix = new_glyph_matrix (NULL); | |
1796 | w->current_matrix = new_glyph_matrix (NULL); | |
1797 | } | |
1798 | ||
5d3cc43c GM |
1799 | dim.width = required_matrix_width (w); |
1800 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1801 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
1802 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
1803 | } | |
177c0ea7 | 1804 | |
d3d50620 | 1805 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
5f5c8ee5 GM |
1806 | } |
1807 | } | |
1808 | ||
1809 | ||
1810 | /* Re-allocate/ re-compute glyph matrices on frame F. If F is null, | |
1811 | do it for all frames; otherwise do it just for the given frame. | |
1812 | This function must be called when a new frame is created, its size | |
1813 | changes, or its window configuration changes. */ | |
1814 | ||
1815 | void | |
971de7fb | 1816 | adjust_glyphs (struct frame *f) |
5f5c8ee5 | 1817 | { |
408f5064 GM |
1818 | /* Block input so that expose events and other events that access |
1819 | glyph matrices are not processed while we are changing them. */ | |
4d7e6e51 | 1820 | block_input (); |
408f5064 | 1821 | |
5f5c8ee5 GM |
1822 | if (f) |
1823 | adjust_frame_glyphs (f); | |
1824 | else | |
1825 | { | |
1826 | Lisp_Object tail, lisp_frame; | |
177c0ea7 | 1827 | |
5f5c8ee5 GM |
1828 | FOR_EACH_FRAME (tail, lisp_frame) |
1829 | adjust_frame_glyphs (XFRAME (lisp_frame)); | |
1830 | } | |
408f5064 | 1831 | |
4d7e6e51 | 1832 | unblock_input (); |
5f5c8ee5 GM |
1833 | } |
1834 | ||
5f5c8ee5 GM |
1835 | /* Allocate/reallocate glyph matrices of a single frame F. */ |
1836 | ||
1837 | static void | |
971de7fb | 1838 | adjust_frame_glyphs (struct frame *f) |
5f5c8ee5 GM |
1839 | { |
1840 | if (FRAME_WINDOW_P (f)) | |
1841 | adjust_frame_glyphs_for_window_redisplay (f); | |
1842 | else | |
1843 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 1844 | |
b09cca6a | 1845 | /* Don't forget the buffer for decode_mode_spec. */ |
5f5c8ee5 GM |
1846 | adjust_decode_mode_spec_buffer (f); |
1847 | ||
1848 | f->glyphs_initialized_p = 1; | |
1849 | } | |
1850 | ||
59ea14cd | 1851 | /* Return true if any window in the tree has nonzero window margins. See |
075757cc | 1852 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ |
59ea14cd | 1853 | static bool |
971de7fb | 1854 | showing_window_margins_p (struct window *w) |
075757cc CY |
1855 | { |
1856 | while (w) | |
1857 | { | |
e74aeda8 | 1858 | if (WINDOWP (w->contents)) |
075757cc | 1859 | { |
e74aeda8 | 1860 | if (showing_window_margins_p (XWINDOW (w->contents))) |
075757cc CY |
1861 | return 1; |
1862 | } | |
e74aeda8 | 1863 | else if (!NILP (w->left_margin_cols) || !NILP (w->right_margin_cols)) |
075757cc | 1864 | return 1; |
3fc809e2 | 1865 | |
d3d50620 | 1866 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
075757cc CY |
1867 | } |
1868 | return 0; | |
1869 | } | |
1870 | ||
5f5c8ee5 | 1871 | |
c9f00270 GM |
1872 | /* In the window tree with root W, build current matrices of leaf |
1873 | windows from the frame's current matrix. */ | |
1874 | ||
1875 | static void | |
971de7fb | 1876 | fake_current_matrices (Lisp_Object window) |
c9f00270 GM |
1877 | { |
1878 | struct window *w; | |
177c0ea7 | 1879 | |
d3d50620 | 1880 | for (; !NILP (window); window = w->next) |
c9f00270 GM |
1881 | { |
1882 | w = XWINDOW (window); | |
177c0ea7 | 1883 | |
e74aeda8 DA |
1884 | if (WINDOWP (w->contents)) |
1885 | fake_current_matrices (w->contents); | |
c9f00270 GM |
1886 | else |
1887 | { | |
1888 | int i; | |
d3d50620 | 1889 | struct frame *f = XFRAME (w->frame); |
c9f00270 GM |
1890 | struct glyph_matrix *m = w->current_matrix; |
1891 | struct glyph_matrix *fm = f->current_matrix; | |
1892 | ||
a54e2c05 DA |
1893 | eassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
1894 | eassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 1895 | |
c9f00270 GM |
1896 | for (i = 0; i < m->matrix_h; ++i) |
1897 | { | |
1898 | struct glyph_row *r = m->rows + i; | |
7df02016 | 1899 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 | 1900 | |
a54e2c05 | 1901 | eassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] |
c9f00270 GM |
1902 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); |
1903 | ||
1904 | r->enabled_p = fr->enabled_p; | |
1905 | if (r->enabled_p) | |
1906 | { | |
1907 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
1908 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
1909 | r->used[TEXT_AREA] = (m->matrix_w | |
1910 | - r->used[LEFT_MARGIN_AREA] | |
1911 | - r->used[RIGHT_MARGIN_AREA]); | |
1912 | r->mode_line_p = 0; | |
c9f00270 GM |
1913 | } |
1914 | } | |
1915 | } | |
1916 | } | |
1917 | } | |
1918 | ||
1919 | ||
bccee4f2 | 1920 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 1921 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 1922 | |
bccee4f2 | 1923 | static struct glyph_matrix * |
971de7fb | 1924 | save_current_matrix (struct frame *f) |
c9f00270 | 1925 | { |
bccee4f2 | 1926 | int i; |
38182d90 | 1927 | struct glyph_matrix *saved = xzalloc (sizeof *saved); |
bccee4f2 | 1928 | saved->nrows = f->current_matrix->nrows; |
23f86fce | 1929 | saved->rows = xzalloc (saved->nrows * sizeof *saved->rows); |
bccee4f2 GM |
1930 | |
1931 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 1932 | { |
bccee4f2 GM |
1933 | struct glyph_row *from = f->current_matrix->rows + i; |
1934 | struct glyph_row *to = saved->rows + i; | |
dfd153ae | 1935 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
23f86fce | 1936 | to->glyphs[TEXT_AREA] = xmalloc (nbytes); |
72af86bd | 1937 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
bccee4f2 | 1938 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
e797dea6 | 1939 | } |
bccee4f2 GM |
1940 | |
1941 | return saved; | |
1942 | } | |
1943 | ||
1944 | ||
1945 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
1946 | and free memory associated with SAVED. */ | |
1947 | ||
1948 | static void | |
971de7fb | 1949 | restore_current_matrix (struct frame *f, struct glyph_matrix *saved) |
bccee4f2 GM |
1950 | { |
1951 | int i; | |
1952 | ||
1953 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 1954 | { |
bccee4f2 GM |
1955 | struct glyph_row *from = saved->rows + i; |
1956 | struct glyph_row *to = f->current_matrix->rows + i; | |
dfd153ae | 1957 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
72af86bd | 1958 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
e797dea6 | 1959 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
bccee4f2 | 1960 | xfree (from->glyphs[TEXT_AREA]); |
e797dea6 | 1961 | } |
177c0ea7 | 1962 | |
bccee4f2 GM |
1963 | xfree (saved->rows); |
1964 | xfree (saved); | |
c9f00270 GM |
1965 | } |
1966 | ||
1967 | ||
bccee4f2 | 1968 | |
5f5c8ee5 GM |
1969 | /* Allocate/reallocate glyph matrices of a single frame F for |
1970 | frame-based redisplay. */ | |
1971 | ||
1972 | static void | |
971de7fb | 1973 | adjust_frame_glyphs_for_frame_redisplay (struct frame *f) |
5f5c8ee5 | 1974 | { |
5f5c8ee5 | 1975 | struct dim matrix_dim; |
59ea14cd | 1976 | bool pool_changed_p; |
5f5c8ee5 GM |
1977 | int window_change_flags; |
1978 | int top_window_y; | |
1979 | ||
1980 | if (!FRAME_LIVE_P (f)) | |
1981 | return; | |
1982 | ||
5f5c8ee5 GM |
1983 | top_window_y = FRAME_TOP_MARGIN (f); |
1984 | ||
1985 | /* Allocate glyph pool structures if not already done. */ | |
1986 | if (f->desired_pool == NULL) | |
1987 | { | |
1988 | f->desired_pool = new_glyph_pool (); | |
1989 | f->current_pool = new_glyph_pool (); | |
1990 | } | |
1991 | ||
1992 | /* Allocate frames matrix structures if needed. */ | |
1993 | if (f->desired_matrix == NULL) | |
1994 | { | |
1995 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1996 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
1997 | } | |
177c0ea7 | 1998 | |
5f5c8ee5 GM |
1999 | /* Compute window glyph matrices. (This takes the mini-buffer |
2000 | window into account). The result is the size of the frame glyph | |
2001 | matrix needed. The variable window_change_flags is set to a bit | |
2002 | mask indicating whether new matrices will be allocated or | |
2003 | existing matrices change their size or location within the frame | |
2004 | matrix. */ | |
2005 | window_change_flags = 0; | |
2006 | matrix_dim | |
2007 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
2008 | 0, top_window_y, | |
5d3cc43c | 2009 | 1, |
5f5c8ee5 GM |
2010 | &window_change_flags); |
2011 | ||
2012 | /* Add in menu bar lines, if any. */ | |
2013 | matrix_dim.height += top_window_y; | |
2014 | ||
2015 | /* Enlarge pools as necessary. */ | |
2016 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
2017 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
2018 | ||
177c0ea7 | 2019 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
2020 | absolutely necessary since it requires a frame redraw. */ |
2021 | if (pool_changed_p || window_change_flags) | |
2022 | { | |
2023 | /* Do it for window matrices. */ | |
2024 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 2025 | 0, top_window_y, 0, |
5f5c8ee5 GM |
2026 | &window_change_flags); |
2027 | ||
2028 | /* Size of frame matrices must equal size of frame. Note | |
2029 | that we are called for X frames with window widths NOT equal | |
2030 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
a54e2c05 | 2031 | eassert (matrix_dim.width == FRAME_COLS (f) |
7df02016 | 2032 | && matrix_dim.height == FRAME_LINES (f)); |
177c0ea7 | 2033 | |
e797dea6 GM |
2034 | /* Pointers to glyph memory in glyph rows are exchanged during |
2035 | the update phase of redisplay, which means in general that a | |
2036 | frame's current matrix consists of pointers into both the | |
2037 | desired and current glyph pool of the frame. Adjusting a | |
2038 | matrix sets the frame matrix up so that pointers are all into | |
2039 | the same pool. If we want to preserve glyph contents of the | |
2040 | current matrix over a call to adjust_glyph_matrix, we must | |
2041 | make a copy of the current glyphs, and restore the current | |
2042 | matrix' contents from that copy. */ | |
2043 | if (display_completed | |
2044 | && !FRAME_GARBAGED_P (f) | |
2045 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
2046 | && matrix_dim.height == f->current_matrix->matrix_h |
2047 | /* For some reason, the frame glyph matrix gets corrupted if | |
2048 | any of the windows contain margins. I haven't been able | |
2049 | to hunt down the reason, but for the moment this prevents | |
2050 | the problem from manifesting. -- cyd */ | |
d5c20fe8 | 2051 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) |
e797dea6 | 2052 | { |
bccee4f2 GM |
2053 | struct glyph_matrix *copy = save_current_matrix (f); |
2054 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2055 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2056 | restore_current_matrix (f, copy); |
e797dea6 GM |
2057 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2058 | } | |
c9f00270 | 2059 | else |
e797dea6 | 2060 | { |
bccee4f2 | 2061 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2062 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2063 | SET_FRAME_GARBAGED (f); | |
2064 | } | |
5f5c8ee5 GM |
2065 | } |
2066 | } | |
2067 | ||
2068 | ||
2069 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2070 | window-based redisplay. */ | |
2071 | ||
2072 | static void | |
971de7fb | 2073 | adjust_frame_glyphs_for_window_redisplay (struct frame *f) |
5f5c8ee5 | 2074 | { |
a54e2c05 | 2075 | eassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); |
177c0ea7 | 2076 | |
5f5c8ee5 | 2077 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2078 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2079 | |
8ce2650d | 2080 | #ifdef HAVE_X_WINDOWS |
5f5c8ee5 GM |
2081 | /* Allocate/ reallocate matrices of the dummy window used to display |
2082 | the menu bar under X when no X toolkit support is available. */ | |
488dd4c4 | 2083 | #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2084 | { |
2085 | /* Allocate a dummy window if not already done. */ | |
d2d37ddc | 2086 | struct window *w; |
e69b0960 | 2087 | if (NILP (f->menu_bar_window)) |
5f5c8ee5 | 2088 | { |
077288cf | 2089 | Lisp_Object frame; |
f00af5b1 | 2090 | fset_menu_bar_window (f, make_window ()); |
e69b0960 | 2091 | w = XWINDOW (f->menu_bar_window); |
077288cf | 2092 | XSETFRAME (frame, f); |
e8c17b81 | 2093 | wset_frame (w, frame); |
5f5c8ee5 GM |
2094 | w->pseudo_window_p = 1; |
2095 | } | |
2096 | else | |
e69b0960 | 2097 | w = XWINDOW (f->menu_bar_window); |
5f5c8ee5 GM |
2098 | |
2099 | /* Set window dimensions to frame dimensions and allocate or | |
2100 | adjust glyph matrices of W. */ | |
5f24fa51 DA |
2101 | w->top_line = 0; |
2102 | w->left_col = 0; | |
2103 | w->total_lines = FRAME_MENU_BAR_LINES (f); | |
2104 | w->total_cols = FRAME_TOTAL_COLS (f); | |
5d3cc43c | 2105 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2106 | } |
57714a86 YM |
2107 | #endif /* not USE_X_TOOLKIT && not USE_GTK */ |
2108 | #endif /* HAVE_X_WINDOWS */ | |
5f5c8ee5 | 2109 | |
488dd4c4 | 2110 | #ifndef USE_GTK |
d2d37ddc PE |
2111 | { |
2112 | /* Allocate/ reallocate matrices of the tool bar window. If we | |
2113 | don't have a tool bar window yet, make one. */ | |
2114 | struct window *w; | |
e69b0960 | 2115 | if (NILP (f->tool_bar_window)) |
d2d37ddc | 2116 | { |
077288cf | 2117 | Lisp_Object frame; |
f00af5b1 | 2118 | fset_tool_bar_window (f, make_window ()); |
e69b0960 | 2119 | w = XWINDOW (f->tool_bar_window); |
077288cf | 2120 | XSETFRAME (frame, f); |
e8c17b81 | 2121 | wset_frame (w, frame); |
d2d37ddc PE |
2122 | w->pseudo_window_p = 1; |
2123 | } | |
2124 | else | |
e69b0960 | 2125 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2126 | |
5f24fa51 DA |
2127 | w->top_line = FRAME_MENU_BAR_LINES (f); |
2128 | w->left_col = 0; | |
2129 | w->total_lines = FRAME_TOOL_BAR_LINES (f); | |
2130 | w->total_cols = FRAME_TOTAL_COLS (f); | |
d2d37ddc PE |
2131 | allocate_matrices_for_window_redisplay (w); |
2132 | } | |
488dd4c4 | 2133 | #endif |
5f5c8ee5 GM |
2134 | } |
2135 | ||
2136 | ||
5f5c8ee5 GM |
2137 | /* Re-allocate buffer for decode_mode_spec on frame F. */ |
2138 | ||
2139 | static void | |
971de7fb | 2140 | adjust_decode_mode_spec_buffer (struct frame *f) |
5f5c8ee5 | 2141 | { |
38182d90 PE |
2142 | f->decode_mode_spec_buffer = xrealloc (f->decode_mode_spec_buffer, |
2143 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
5f5c8ee5 GM |
2144 | } |
2145 | ||
2146 | ||
2147 | \f | |
2148 | /********************************************************************** | |
2149 | Freeing Glyph Matrices | |
2150 | **********************************************************************/ | |
2151 | ||
2152 | /* Free glyph memory for a frame F. F may be null. This function can | |
2153 | be called for the same frame more than once. The root window of | |
2154 | F may be nil when this function is called. This is the case when | |
2155 | the function is called when F is destroyed. */ | |
2156 | ||
2157 | void | |
971de7fb | 2158 | free_glyphs (struct frame *f) |
5f5c8ee5 GM |
2159 | { |
2160 | if (f && f->glyphs_initialized_p) | |
2161 | { | |
42f55fe0 GM |
2162 | /* Block interrupt input so that we don't get surprised by an X |
2163 | event while we're in an inconsistent state. */ | |
4d7e6e51 | 2164 | block_input (); |
5f5c8ee5 | 2165 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2166 | |
5f5c8ee5 | 2167 | /* Release window sub-matrices. */ |
e69b0960 DA |
2168 | if (!NILP (f->root_window)) |
2169 | free_window_matrices (XWINDOW (f->root_window)); | |
5f5c8ee5 | 2170 | |
5a49b79c | 2171 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2172 | /* Free the dummy window for menu bars without X toolkit and its |
2173 | glyph matrices. */ | |
e69b0960 | 2174 | if (!NILP (f->menu_bar_window)) |
5f5c8ee5 | 2175 | { |
e69b0960 | 2176 | struct window *w = XWINDOW (f->menu_bar_window); |
5f5c8ee5 GM |
2177 | free_glyph_matrix (w->desired_matrix); |
2178 | free_glyph_matrix (w->current_matrix); | |
2179 | w->desired_matrix = w->current_matrix = NULL; | |
f00af5b1 | 2180 | fset_menu_bar_window (f, Qnil); |
5f5c8ee5 | 2181 | } |
5a49b79c | 2182 | #endif |
5f5c8ee5 | 2183 | |
9ea173e8 | 2184 | /* Free the tool bar window and its glyph matrices. */ |
e69b0960 | 2185 | if (!NILP (f->tool_bar_window)) |
5f5c8ee5 | 2186 | { |
e69b0960 | 2187 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2188 | free_glyph_matrix (w->desired_matrix); |
2189 | free_glyph_matrix (w->current_matrix); | |
2190 | w->desired_matrix = w->current_matrix = NULL; | |
f00af5b1 | 2191 | fset_tool_bar_window (f, Qnil); |
5f5c8ee5 GM |
2192 | } |
2193 | ||
2194 | /* Release frame glyph matrices. Reset fields to zero in | |
2195 | case we are called a second time. */ | |
2196 | if (f->desired_matrix) | |
2197 | { | |
2198 | free_glyph_matrix (f->desired_matrix); | |
2199 | free_glyph_matrix (f->current_matrix); | |
2200 | f->desired_matrix = f->current_matrix = NULL; | |
2201 | } | |
2202 | ||
2203 | /* Release glyph pools. */ | |
2204 | if (f->desired_pool) | |
2205 | { | |
2206 | free_glyph_pool (f->desired_pool); | |
2207 | free_glyph_pool (f->current_pool); | |
2208 | f->desired_pool = f->current_pool = NULL; | |
2209 | } | |
177c0ea7 | 2210 | |
4d7e6e51 | 2211 | unblock_input (); |
5f5c8ee5 GM |
2212 | } |
2213 | } | |
2214 | ||
2215 | ||
2216 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2217 | function may be called with a null pointer, and it may be called on | |
2218 | the same tree more than once. */ | |
2219 | ||
2220 | void | |
971de7fb | 2221 | free_window_matrices (struct window *w) |
5f5c8ee5 GM |
2222 | { |
2223 | while (w) | |
2224 | { | |
e74aeda8 DA |
2225 | if (WINDOWP (w->contents)) |
2226 | free_window_matrices (XWINDOW (w->contents)); | |
177c0ea7 | 2227 | else |
5f5c8ee5 GM |
2228 | { |
2229 | /* This is a leaf window. Free its memory and reset fields | |
2230 | to zero in case this function is called a second time for | |
2231 | W. */ | |
2232 | free_glyph_matrix (w->current_matrix); | |
2233 | free_glyph_matrix (w->desired_matrix); | |
2234 | w->current_matrix = w->desired_matrix = NULL; | |
2235 | } | |
2236 | ||
2237 | /* Next window on same level. */ | |
d3d50620 | 2238 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2239 | } |
2240 | } | |
2241 | ||
2242 | ||
2243 | /* Check glyph memory leaks. This function is called from | |
2244 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2245 | exits. We therefore free all glyph memory for all active frames | |
2246 | explicitly and check that nothing is left allocated. */ | |
2247 | ||
2248 | void | |
971de7fb | 2249 | check_glyph_memory (void) |
5f5c8ee5 GM |
2250 | { |
2251 | Lisp_Object tail, frame; | |
2252 | ||
2253 | /* Free glyph memory for all frames. */ | |
2254 | FOR_EACH_FRAME (tail, frame) | |
2255 | free_glyphs (XFRAME (frame)); | |
2256 | ||
2257 | /* Check that nothing is left allocated. */ | |
2258 | if (glyph_matrix_count) | |
1088b922 | 2259 | emacs_abort (); |
5f5c8ee5 | 2260 | if (glyph_pool_count) |
1088b922 | 2261 | emacs_abort (); |
5f5c8ee5 GM |
2262 | } |
2263 | ||
2264 | ||
2265 | \f | |
2266 | /********************************************************************** | |
2267 | Building a Frame Matrix | |
2268 | **********************************************************************/ | |
2269 | ||
2270 | /* Most of the redisplay code works on glyph matrices attached to | |
2271 | windows. This is a good solution most of the time, but it is not | |
2272 | suitable for terminal code. Terminal output functions cannot rely | |
2273 | on being able to set an arbitrary terminal window. Instead they | |
2274 | must be provided with a view of the whole frame, i.e. the whole | |
2275 | screen. We build such a view by constructing a frame matrix from | |
2276 | window matrices in this section. | |
2277 | ||
2278 | Windows that must be updated have their must_be_update_p flag set. | |
2279 | For all such windows, their desired matrix is made part of the | |
2280 | desired frame matrix. For other windows, their current matrix is | |
2281 | made part of the desired frame matrix. | |
2282 | ||
2283 | +-----------------+----------------+ | |
2284 | | desired | desired | | |
2285 | | | | | |
2286 | +-----------------+----------------+ | |
2287 | | current | | |
2288 | | | | |
2289 | +----------------------------------+ | |
2290 | ||
2291 | Desired window matrices can be made part of the frame matrix in a | |
2292 | cheap way: We exploit the fact that the desired frame matrix and | |
2293 | desired window matrices share their glyph memory. This is not | |
2294 | possible for current window matrices. Their glyphs are copied to | |
2295 | the desired frame matrix. The latter is equivalent to | |
2296 | preserve_other_columns in the old redisplay. | |
2297 | ||
2298 | Used glyphs counters for frame matrix rows are the result of adding | |
2299 | up glyph lengths of the window matrices. A line in the frame | |
2300 | matrix is enabled, if a corresponding line in a window matrix is | |
2301 | enabled. | |
177c0ea7 | 2302 | |
5f5c8ee5 GM |
2303 | After building the desired frame matrix, it will be passed to |
2304 | terminal code, which will manipulate both the desired and current | |
2305 | frame matrix. Changes applied to the frame's current matrix have | |
2306 | to be visible in current window matrices afterwards, of course. | |
2307 | ||
2308 | This problem is solved like this: | |
2309 | ||
2310 | 1. Window and frame matrices share glyphs. Window matrices are | |
2311 | constructed in a way that their glyph contents ARE the glyph | |
2312 | contents needed in a frame matrix. Thus, any modification of | |
2313 | glyphs done in terminal code will be reflected in window matrices | |
2314 | automatically. | |
177c0ea7 | 2315 | |
5f5c8ee5 GM |
2316 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2317 | intercepted by hook functions so that corresponding row operations | |
2318 | on window matrices can be performed. This is necessary because we | |
2319 | use pointers to glyphs in glyph row structures. To satisfy the | |
2320 | assumption of point 1 above that glyphs are updated implicitly in | |
2321 | window matrices when they are manipulated via the frame matrix, | |
2322 | window and frame matrix must of course agree where to find the | |
2323 | glyphs for their rows. Possible manipulations that must be | |
2324 | mirrored are assignments of rows of the desired frame matrix to the | |
2325 | current frame matrix and scrolling the current frame matrix. */ | |
2326 | ||
2327 | /* Build frame F's desired matrix from window matrices. Only windows | |
2328 | which have the flag must_be_updated_p set have to be updated. Menu | |
2329 | bar lines of a frame are not covered by window matrices, so make | |
2330 | sure not to touch them in this function. */ | |
2331 | ||
2332 | static void | |
971de7fb | 2333 | build_frame_matrix (struct frame *f) |
5f5c8ee5 GM |
2334 | { |
2335 | int i; | |
2336 | ||
2337 | /* F must have a frame matrix when this function is called. */ | |
a54e2c05 | 2338 | eassert (!FRAME_WINDOW_P (f)); |
177c0ea7 | 2339 | |
5f5c8ee5 GM |
2340 | /* Clear all rows in the frame matrix covered by window matrices. |
2341 | Menu bar lines are not covered by windows. */ | |
2342 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2343 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2344 | ||
2345 | /* Build the matrix by walking the window tree. */ | |
2346 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2347 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2348 | } | |
2349 | ||
2350 | ||
2351 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2352 | matrices. W is the root of a window tree. */ | |
2353 | ||
2354 | static void | |
971de7fb | 2355 | build_frame_matrix_from_window_tree (struct glyph_matrix *matrix, struct window *w) |
5f5c8ee5 GM |
2356 | { |
2357 | while (w) | |
2358 | { | |
e74aeda8 DA |
2359 | if (WINDOWP (w->contents)) |
2360 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->contents)); | |
5f5c8ee5 GM |
2361 | else |
2362 | build_frame_matrix_from_leaf_window (matrix, w); | |
2363 | ||
d3d50620 | 2364 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2365 | } |
2366 | } | |
2367 | ||
2368 | ||
2369 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2370 | desired frame matrix built. W is a leaf window whose desired or | |
2371 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2372 | must_be_updated_p determines which matrix it contributes to | |
59ea14cd | 2373 | FRAME_MATRIX. If W->must_be_updated_p, W's desired matrix |
5f5c8ee5 GM |
2374 | is added to FRAME_MATRIX, otherwise W's current matrix is added. |
2375 | Adding a desired matrix means setting up used counters and such in | |
2376 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2377 | means copying glyphs. The latter case corresponds to | |
2378 | preserve_other_columns in the old redisplay. */ | |
2379 | ||
2380 | static void | |
971de7fb | 2381 | build_frame_matrix_from_leaf_window (struct glyph_matrix *frame_matrix, struct window *w) |
5f5c8ee5 GM |
2382 | { |
2383 | struct glyph_matrix *window_matrix; | |
2384 | int window_y, frame_y; | |
2385 | /* If non-zero, a glyph to insert at the right border of W. */ | |
3fc809e2 KS |
2386 | GLYPH right_border_glyph; |
2387 | ||
2388 | SET_GLYPH_FROM_CHAR (right_border_glyph, 0); | |
5f5c8ee5 GM |
2389 | |
2390 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2391 | if (w->must_be_updated_p) | |
2392 | { | |
2393 | window_matrix = w->desired_matrix; | |
2394 | ||
2395 | /* Decide whether we want to add a vertical border glyph. */ | |
2396 | if (!WINDOW_RIGHTMOST_P (w)) | |
2397 | { | |
2398 | struct Lisp_Char_Table *dp = window_display_table (w); | |
3fc809e2 | 2399 | Lisp_Object gc; |
b4e49aee | 2400 | |
3fc809e2 KS |
2401 | SET_GLYPH_FROM_CHAR (right_border_glyph, '|'); |
2402 | if (dp | |
d311d28c | 2403 | && (gc = DISP_BORDER_GLYPH (dp), GLYPH_CODE_P (gc))) |
3fc809e2 KS |
2404 | { |
2405 | SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph, gc); | |
2406 | spec_glyph_lookup_face (w, &right_border_glyph); | |
2407 | } | |
b4e49aee | 2408 | |
3fc809e2 KS |
2409 | if (GLYPH_FACE (right_border_glyph) <= 0) |
2410 | SET_GLYPH_FACE (right_border_glyph, VERTICAL_BORDER_FACE_ID); | |
5f5c8ee5 GM |
2411 | } |
2412 | } | |
2413 | else | |
2414 | window_matrix = w->current_matrix; | |
2415 | ||
2416 | /* For all rows in the window matrix and corresponding rows in the | |
2417 | frame matrix. */ | |
2418 | window_y = 0; | |
2419 | frame_y = window_matrix->matrix_y; | |
2420 | while (window_y < window_matrix->nrows) | |
2421 | { | |
2422 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2423 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
59ea14cd | 2424 | bool current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2425 | |
2426 | /* Fill up the frame row with spaces up to the left margin of the | |
2427 | window row. */ | |
2428 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2429 | ||
2430 | /* Fill up areas in the window matrix row with spaces. */ | |
2431 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2432 | |
2433 | /* If only part of W's desired matrix has been built, and | |
2434 | window_row wasn't displayed, use the corresponding current | |
2435 | row instead. */ | |
2436 | if (window_matrix == w->desired_matrix | |
2437 | && !window_row->enabled_p) | |
2438 | { | |
2439 | window_row = w->current_matrix->rows + window_y; | |
2440 | current_row_p = 1; | |
2441 | } | |
177c0ea7 | 2442 | |
2a8bd25f | 2443 | if (current_row_p) |
5f5c8ee5 | 2444 | { |
2a8bd25f | 2445 | /* Copy window row to frame row. */ |
72af86bd AS |
2446 | memcpy (frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, |
2447 | window_row->glyphs[0], | |
2448 | window_matrix->matrix_w * sizeof (struct glyph)); | |
5f5c8ee5 GM |
2449 | } |
2450 | else | |
2451 | { | |
a54e2c05 | 2452 | eassert (window_row->enabled_p); |
177c0ea7 | 2453 | |
2a8bd25f GM |
2454 | /* Only when a desired row has been displayed, we want |
2455 | the corresponding frame row to be updated. */ | |
2456 | frame_row->enabled_p = 1; | |
177c0ea7 | 2457 | |
5f5c8ee5 GM |
2458 | /* Maybe insert a vertical border between horizontally adjacent |
2459 | windows. */ | |
3fc809e2 | 2460 | if (GLYPH_CHAR (right_border_glyph) != 0) |
5f5c8ee5 GM |
2461 | { |
2462 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2463 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2464 | } | |
2465 | ||
e509cfa6 | 2466 | #ifdef GLYPH_DEBUG |
a13396c9 GM |
2467 | /* Window row window_y must be a slice of frame row |
2468 | frame_y. */ | |
a54e2c05 | 2469 | eassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2470 | |
5f5c8ee5 GM |
2471 | /* If rows are in sync, we don't have to copy glyphs because |
2472 | frame and window share glyphs. */ | |
177c0ea7 | 2473 | |
a38634ff | 2474 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2475 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2476 | #endif |
5f5c8ee5 GM |
2477 | } |
2478 | ||
2479 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2480 | up with spaces, and visit leaf windows from left to right it | |
2481 | can be done simply. */ | |
177c0ea7 | 2482 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2483 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2484 | ||
5f5c8ee5 GM |
2485 | /* Next row. */ |
2486 | ++window_y; | |
2487 | ++frame_y; | |
2488 | } | |
2489 | } | |
2490 | ||
5f81871e RS |
2491 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2492 | ID, return a glyph that has a realized face ID. | |
2493 | This is used for glyphs displayed specially and not part of the text; | |
2494 | for instance, vertical separators, truncation markers, etc. */ | |
2495 | ||
3fc809e2 | 2496 | void |
971de7fb | 2497 | spec_glyph_lookup_face (struct window *w, GLYPH *glyph) |
5f81871e | 2498 | { |
3fc809e2 | 2499 | int lface_id = GLYPH_FACE (*glyph); |
5f81871e RS |
2500 | /* Convert the glyph's specified face to a realized (cache) face. */ |
2501 | if (lface_id > 0) | |
2502 | { | |
d3d50620 | 2503 | int face_id = merge_faces (XFRAME (w->frame), |
5f81871e | 2504 | Qt, lface_id, DEFAULT_FACE_ID); |
3fc809e2 | 2505 | SET_GLYPH_FACE (*glyph, face_id); |
5f81871e | 2506 | } |
5f81871e | 2507 | } |
5f5c8ee5 GM |
2508 | |
2509 | /* Add spaces to a glyph row ROW in a window matrix. | |
2510 | ||
2511 | Each row has the form: | |
2512 | ||
2513 | +---------+-----------------------------+------------+ | |
2514 | | left | text | right | | |
2515 | +---------+-----------------------------+------------+ | |
2516 | ||
2517 | Left and right marginal areas are optional. This function adds | |
2518 | spaces to areas so that there are no empty holes between areas. | |
2519 | In other words: If the right area is not empty, the text area | |
2520 | is filled up with spaces up to the right area. If the text area | |
2521 | is not empty, the left area is filled up. | |
2522 | ||
2523 | To be called for frame-based redisplay, only. */ | |
2524 | ||
2525 | static void | |
971de7fb | 2526 | fill_up_glyph_row_with_spaces (struct glyph_row *row) |
5f5c8ee5 GM |
2527 | { |
2528 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2529 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2530 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2531 | } | |
2532 | ||
2533 | ||
2534 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2535 | frame-based redisplay only. */ | |
2536 | ||
2537 | static void | |
971de7fb | 2538 | fill_up_glyph_row_area_with_spaces (struct glyph_row *row, int area) |
5f5c8ee5 GM |
2539 | { |
2540 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2541 | { | |
2542 | struct glyph *end = row->glyphs[area + 1]; | |
2543 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2544 | ||
2545 | while (text < end) | |
2546 | *text++ = space_glyph; | |
2547 | row->used[area] = text - row->glyphs[area]; | |
2548 | } | |
2549 | } | |
2550 | ||
2551 | ||
2552 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2553 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2554 | ||
2555 | static void | |
971de7fb | 2556 | fill_up_frame_row_with_spaces (struct glyph_row *row, int upto) |
5f5c8ee5 GM |
2557 | { |
2558 | int i = row->used[TEXT_AREA]; | |
2559 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2560 | |
5f5c8ee5 GM |
2561 | while (i < upto) |
2562 | glyph[i++] = space_glyph; | |
2563 | ||
2564 | row->used[TEXT_AREA] = i; | |
2565 | } | |
2566 | ||
2567 | ||
2568 | \f | |
2569 | /********************************************************************** | |
2570 | Mirroring operations on frame matrices in window matrices | |
2571 | **********************************************************************/ | |
2572 | ||
2573 | /* Set frame being updated via frame-based redisplay to F. This | |
2574 | function must be called before updates to make explicit that we are | |
2575 | working on frame matrices or not. */ | |
2576 | ||
b0ab8123 | 2577 | static void |
971de7fb | 2578 | set_frame_matrix_frame (struct frame *f) |
5f5c8ee5 GM |
2579 | { |
2580 | frame_matrix_frame = f; | |
2581 | } | |
2582 | ||
2583 | ||
2584 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2585 | DESIRED_MATRIX is the desired matrix corresponding to | |
2586 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2587 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2588 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2589 | done in frame matrices, and that we have to perform analogous | |
2590 | operations in window matrices of frame_matrix_frame. */ | |
2591 | ||
b0ab8123 | 2592 | static void |
971de7fb | 2593 | make_current (struct glyph_matrix *desired_matrix, struct glyph_matrix *current_matrix, int row) |
5f5c8ee5 GM |
2594 | { |
2595 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2596 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
59ea14cd | 2597 | bool mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2598 | |
2599 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2600 | between both rows, and does a structure assignment otherwise. */ | |
2601 | assign_row (current_row, desired_row); | |
2602 | ||
2603 | /* Enable current_row to mark it as valid. */ | |
2604 | current_row->enabled_p = 1; | |
e876ff42 | 2605 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2606 | |
2607 | /* If we are called on frame matrices, perform analogous operations | |
2608 | for window matrices. */ | |
2609 | if (frame_matrix_frame) | |
e69b0960 | 2610 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); |
5f5c8ee5 GM |
2611 | } |
2612 | ||
2613 | ||
2614 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2615 | W's frame which has been made current (by swapping pointers between | |
2616 | current and desired matrix). Perform analogous operations in the | |
2617 | matrices of leaf windows in the window tree rooted at W. */ | |
2618 | ||
2619 | static void | |
971de7fb | 2620 | mirror_make_current (struct window *w, int frame_row) |
5f5c8ee5 GM |
2621 | { |
2622 | while (w) | |
2623 | { | |
e74aeda8 DA |
2624 | if (WINDOWP (w->contents)) |
2625 | mirror_make_current (XWINDOW (w->contents), frame_row); | |
5f5c8ee5 GM |
2626 | else |
2627 | { | |
2628 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2629 | here because the checks performed in debug mode there | |
2630 | will not allow the conversion. */ | |
2631 | int row = frame_row - w->desired_matrix->matrix_y; | |
2632 | ||
2633 | /* If FRAME_ROW is within W, assign the desired row to the | |
2634 | current row (exchanging glyph pointers). */ | |
2635 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
2636 | { | |
2637 | struct glyph_row *current_row | |
2638 | = MATRIX_ROW (w->current_matrix, row); | |
2639 | struct glyph_row *desired_row | |
2640 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
2641 | |
2642 | if (desired_row->enabled_p) | |
2643 | assign_row (current_row, desired_row); | |
2644 | else | |
2645 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 | 2646 | current_row->enabled_p = 1; |
d009ae66 EZ |
2647 | |
2648 | /* Set the Y coordinate of the mode/header line's row. | |
2649 | It is needed in draw_row_with_mouse_face to find the | |
2650 | screen coordinates. (Window-based redisplay sets | |
2651 | this in update_window, but no one seems to do that | |
2652 | for frame-based redisplay.) */ | |
2653 | if (current_row->mode_line_p) | |
2654 | current_row->y = row; | |
5f5c8ee5 GM |
2655 | } |
2656 | } | |
177c0ea7 | 2657 | |
d3d50620 | 2658 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2659 | } |
2660 | } | |
2661 | ||
2662 | ||
2663 | /* Perform row dance after scrolling. We are working on the range of | |
2664 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
2665 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
2666 | row I in the range 0 <= I < NLINES, the index of the original line | |
2667 | to move to I. This index is relative to the row range, i.e. 0 <= | |
2668 | index < NLINES. RETAINED_P is a vector containing zero for each | |
2669 | row 0 <= I < NLINES which is empty. | |
2670 | ||
2671 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 2672 | |
5f5c8ee5 | 2673 | void |
6f704c76 DN |
2674 | mirrored_line_dance (struct glyph_matrix *matrix, int unchanged_at_top, int nlines, |
2675 | int *copy_from, char *retained_p) | |
5f5c8ee5 GM |
2676 | { |
2677 | /* A copy of original rows. */ | |
2678 | struct glyph_row *old_rows; | |
2679 | ||
2680 | /* Rows to assign to. */ | |
2681 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 2682 | |
5f5c8ee5 GM |
2683 | int i; |
2684 | ||
2685 | /* Make a copy of the original rows. */ | |
38182d90 | 2686 | old_rows = alloca (nlines * sizeof *old_rows); |
72af86bd | 2687 | memcpy (old_rows, new_rows, nlines * sizeof *old_rows); |
5f5c8ee5 GM |
2688 | |
2689 | /* Assign new rows, maybe clear lines. */ | |
2690 | for (i = 0; i < nlines; ++i) | |
2691 | { | |
59ea14cd | 2692 | bool enabled_before_p = new_rows[i].enabled_p; |
5f5c8ee5 | 2693 | |
a54e2c05 DA |
2694 | eassert (i + unchanged_at_top < matrix->nrows); |
2695 | eassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
5f5c8ee5 GM |
2696 | new_rows[i] = old_rows[copy_from[i]]; |
2697 | new_rows[i].enabled_p = enabled_before_p; | |
2698 | ||
2699 | /* RETAINED_P is zero for empty lines. */ | |
2700 | if (!retained_p[copy_from[i]]) | |
2701 | new_rows[i].enabled_p = 0; | |
2702 | } | |
2703 | ||
153a073c | 2704 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 | 2705 | if (frame_matrix_frame) |
e69b0960 | 2706 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), |
5f5c8ee5 GM |
2707 | unchanged_at_top, nlines, copy_from, retained_p); |
2708 | } | |
2709 | ||
2710 | ||
a13396c9 | 2711 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 2712 | the current frame matrix. */ |
a13396c9 GM |
2713 | |
2714 | static void | |
971de7fb | 2715 | sync_window_with_frame_matrix_rows (struct window *w) |
a13396c9 | 2716 | { |
d3d50620 | 2717 | struct frame *f = XFRAME (w->frame); |
a13396c9 | 2718 | struct glyph_row *window_row, *window_row_end, *frame_row; |
075c507b | 2719 | int left, right, x, width; |
a13396c9 | 2720 | |
e74aeda8 DA |
2721 | /* Preconditions: W must be a live window on a tty frame. */ |
2722 | eassert (BUFFERP (w->contents)); | |
a54e2c05 | 2723 | eassert (!FRAME_WINDOW_P (f)); |
a13396c9 | 2724 | |
d3d50620 DA |
2725 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
2726 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
2727 | x = w->current_matrix->matrix_x; |
2728 | width = w->current_matrix->matrix_w; | |
2729 | ||
a13396c9 GM |
2730 | window_row = w->current_matrix->rows; |
2731 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 2732 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 2733 | |
5cb88111 | 2734 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 2735 | { |
5cb88111 GM |
2736 | window_row->glyphs[LEFT_MARGIN_AREA] |
2737 | = frame_row->glyphs[0] + x; | |
2738 | window_row->glyphs[TEXT_AREA] | |
2739 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
2740 | window_row->glyphs[LAST_AREA] | |
2741 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
2742 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
2743 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
2744 | } |
2745 | } | |
2746 | ||
2747 | ||
2748 | /* Return the window in the window tree rooted in W containing frame | |
2749 | row ROW. Value is null if none is found. */ | |
2750 | ||
09ad5a91 | 2751 | static struct window * |
971de7fb | 2752 | frame_row_to_window (struct window *w, int row) |
a13396c9 GM |
2753 | { |
2754 | struct window *found = NULL; | |
177c0ea7 | 2755 | |
a13396c9 GM |
2756 | while (w && !found) |
2757 | { | |
e74aeda8 DA |
2758 | if (WINDOWP (w->contents)) |
2759 | found = frame_row_to_window (XWINDOW (w->contents), row); | |
7df02016 KS |
2760 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
2761 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 2762 | found = w; |
177c0ea7 | 2763 | |
d3d50620 | 2764 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
a13396c9 GM |
2765 | } |
2766 | ||
2767 | return found; | |
2768 | } | |
2769 | ||
2770 | ||
5f5c8ee5 GM |
2771 | /* Perform a line dance in the window tree rooted at W, after |
2772 | scrolling a frame matrix in mirrored_line_dance. | |
2773 | ||
2774 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
2775 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
2776 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
2777 | I < NLINES, the index of the original line to move to I. This | |
2778 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
2779 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
2780 | which is empty. */ | |
2781 | ||
2782 | static void | |
971de7fb | 2783 | mirror_line_dance (struct window *w, int unchanged_at_top, int nlines, int *copy_from, char *retained_p) |
5f5c8ee5 GM |
2784 | { |
2785 | while (w) | |
2786 | { | |
e74aeda8 DA |
2787 | if (WINDOWP (w->contents)) |
2788 | mirror_line_dance (XWINDOW (w->contents), unchanged_at_top, | |
5f5c8ee5 GM |
2789 | nlines, copy_from, retained_p); |
2790 | else | |
2791 | { | |
2792 | /* W is a leaf window, and we are working on its current | |
2793 | matrix m. */ | |
2794 | struct glyph_matrix *m = w->current_matrix; | |
59ea14cd PE |
2795 | int i; |
2796 | bool sync_p = 0; | |
5f5c8ee5 GM |
2797 | struct glyph_row *old_rows; |
2798 | ||
2799 | /* Make a copy of the original rows of matrix m. */ | |
38182d90 | 2800 | old_rows = alloca (m->nrows * sizeof *old_rows); |
72af86bd | 2801 | memcpy (old_rows, m->rows, m->nrows * sizeof *old_rows); |
5f5c8ee5 GM |
2802 | |
2803 | for (i = 0; i < nlines; ++i) | |
2804 | { | |
2805 | /* Frame relative line assigned to. */ | |
2806 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 2807 | |
5f5c8ee5 GM |
2808 | /* Frame relative line assigned. */ |
2809 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 2810 | |
5f5c8ee5 GM |
2811 | /* Window relative line assigned to. */ |
2812 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 2813 | |
5f5c8ee5 GM |
2814 | /* Window relative line assigned. */ |
2815 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 2816 | |
5f5c8ee5 | 2817 | /* Is assigned line inside window? */ |
59ea14cd | 2818 | bool from_inside_window_p |
5f5c8ee5 | 2819 | = window_from >= 0 && window_from < m->matrix_h; |
177c0ea7 | 2820 | |
a13396c9 | 2821 | /* Is assigned to line inside window? */ |
59ea14cd | 2822 | bool to_inside_window_p |
a13396c9 | 2823 | = window_to >= 0 && window_to < m->matrix_h; |
177c0ea7 | 2824 | |
a13396c9 | 2825 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 2826 | { |
5f5c8ee5 GM |
2827 | /* Do the assignment. The enabled_p flag is saved |
2828 | over the assignment because the old redisplay did | |
2829 | that. */ | |
59ea14cd | 2830 | bool enabled_before_p = m->rows[window_to].enabled_p; |
5f5c8ee5 GM |
2831 | m->rows[window_to] = old_rows[window_from]; |
2832 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 2833 | |
5f5c8ee5 GM |
2834 | /* If frame line is empty, window line is empty, too. */ |
2835 | if (!retained_p[copy_from[i]]) | |
2836 | m->rows[window_to].enabled_p = 0; | |
2837 | } | |
a13396c9 GM |
2838 | else if (to_inside_window_p) |
2839 | { | |
2840 | /* A copy between windows. This is an infrequent | |
2841 | case not worth optimizing. */ | |
d3d50620 | 2842 | struct frame *f = XFRAME (w->frame); |
a13396c9 GM |
2843 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
2844 | struct window *w2; | |
2845 | struct glyph_matrix *m2; | |
2846 | int m2_from; | |
2847 | ||
fe8b8401 | 2848 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
2849 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
2850 | -nw', FROM_FRAME sometimes has no associated window. | |
2851 | This check avoids a segfault if W2 is null. */ | |
2852 | if (w2) | |
2853 | { | |
2854 | m2 = w2->current_matrix; | |
2855 | m2_from = frame_from - m2->matrix_y; | |
2856 | copy_row_except_pointers (m->rows + window_to, | |
2857 | m2->rows + m2_from); | |
2858 | ||
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 | sync_p = 1; |
2864 | } | |
2865 | else if (from_inside_window_p) | |
2866 | sync_p = 1; | |
5f5c8ee5 | 2867 | } |
a13396c9 GM |
2868 | |
2869 | /* If there was a copy between windows, make sure glyph | |
2870 | pointers are in sync with the frame matrix. */ | |
2871 | if (sync_p) | |
2872 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 2873 | |
5f5c8ee5 GM |
2874 | /* Check that no pointers are lost. */ |
2875 | CHECK_MATRIX (m); | |
2876 | } | |
2877 | ||
2878 | /* Next window on same level. */ | |
d3d50620 | 2879 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2880 | } |
2881 | } | |
2882 | ||
2883 | ||
e509cfa6 | 2884 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
2885 | |
2886 | /* Check that window and frame matrices agree about their | |
2887 | understanding where glyphs of the rows are to find. For each | |
2888 | window in the window tree rooted at W, check that rows in the | |
2889 | matrices of leaf window agree with their frame matrices about | |
2890 | glyph pointers. */ | |
2891 | ||
85fece3e | 2892 | static void |
59fc5cf9 | 2893 | check_window_matrix_pointers (struct window *w) |
5f5c8ee5 GM |
2894 | { |
2895 | while (w) | |
2896 | { | |
e74aeda8 DA |
2897 | if (WINDOWP (w->contents)) |
2898 | check_window_matrix_pointers (XWINDOW (w->contents)); | |
5f5c8ee5 | 2899 | else |
60a8948a | 2900 | { |
d3d50620 | 2901 | struct frame *f = XFRAME (w->frame); |
5f5c8ee5 GM |
2902 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); |
2903 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 2904 | } |
177c0ea7 | 2905 | |
d3d50620 | 2906 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2907 | } |
2908 | } | |
2909 | ||
2910 | ||
2911 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
2912 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
2913 | each row in WINDOW_MATRIX check that it's a slice of the | |
2914 | corresponding frame row. If it isn't, abort. */ | |
2915 | ||
2916 | static void | |
59fc5cf9 AS |
2917 | check_matrix_pointers (struct glyph_matrix *window_matrix, |
2918 | struct glyph_matrix *frame_matrix) | |
5f5c8ee5 GM |
2919 | { |
2920 | /* Row number in WINDOW_MATRIX. */ | |
2921 | int i = 0; | |
2922 | ||
2923 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
2924 | int j = window_matrix->matrix_y; | |
2925 | ||
177c0ea7 | 2926 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
2927 | slice of the row in the frame matrix. If it isn't we didn't |
2928 | mirror an operation on the frame matrix correctly. */ | |
2929 | while (i < window_matrix->nrows) | |
2930 | { | |
2931 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
2932 | frame_matrix->rows + j)) | |
1088b922 | 2933 | emacs_abort (); |
5f5c8ee5 GM |
2934 | ++i, ++j; |
2935 | } | |
2936 | } | |
2937 | ||
e509cfa6 | 2938 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
2939 | |
2940 | ||
2941 | \f | |
2942 | /********************************************************************** | |
2943 | VPOS and HPOS translations | |
2944 | **********************************************************************/ | |
2945 | ||
e509cfa6 | 2946 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
2947 | |
2948 | /* Translate vertical position VPOS which is relative to window W to a | |
2949 | vertical position relative to W's frame. */ | |
2950 | ||
2951 | static int | |
59fc5cf9 | 2952 | window_to_frame_vpos (struct window *w, int vpos) |
5f5c8ee5 | 2953 | { |
d3d50620 | 2954 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
a54e2c05 | 2955 | eassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); |
7df02016 | 2956 | vpos += WINDOW_TOP_EDGE_LINE (w); |
d3d50620 | 2957 | eassert (vpos >= 0 && vpos <= FRAME_LINES (XFRAME (w->frame))); |
5f5c8ee5 GM |
2958 | return vpos; |
2959 | } | |
2960 | ||
2961 | ||
2962 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 2963 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
2964 | |
2965 | static int | |
59fc5cf9 | 2966 | window_to_frame_hpos (struct window *w, int hpos) |
5f5c8ee5 | 2967 | { |
d3d50620 | 2968 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 2969 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
2970 | return hpos; |
2971 | } | |
177c0ea7 | 2972 | |
5f5c8ee5 GM |
2973 | #endif /* GLYPH_DEBUG */ |
2974 | ||
2975 | ||
2976 | \f | |
2977 | /********************************************************************** | |
2978 | Redrawing Frames | |
2979 | **********************************************************************/ | |
2980 | ||
2a14f83b | 2981 | /* Redraw frame F. */ |
5f5c8ee5 | 2982 | |
2a14f83b DA |
2983 | void |
2984 | redraw_frame (struct frame *f) | |
2985 | { | |
2986 | /* Error if F has no glyphs. */ | |
2987 | eassert (f->glyphs_initialized_p); | |
5f5c8ee5 | 2988 | update_begin (f); |
3224dac1 | 2989 | #ifdef MSDOS |
f2adda5e | 2990 | if (FRAME_MSDOS_P (f)) |
79d39b69 | 2991 | FRAME_TERMINAL (f)->set_terminal_modes_hook (FRAME_TERMINAL (f)); |
3224dac1 | 2992 | #endif |
385ed61f | 2993 | clear_frame (f); |
5f5c8ee5 GM |
2994 | clear_current_matrices (f); |
2995 | update_end (f); | |
daf01701 | 2996 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 2997 | fflush (FRAME_TTY (f)->output); |
5f5c8ee5 GM |
2998 | windows_or_buffers_changed++; |
2999 | /* Mark all windows as inaccurate, so that every window will have | |
3000 | its redisplay done. */ | |
3001 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
3002 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
3003 | f->garbaged = 0; | |
5f5c8ee5 GM |
3004 | } |
3005 | ||
2a14f83b DA |
3006 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 0, 1, 0, |
3007 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. | |
3008 | If FRAME is omitted or nil, the selected frame is used. */) | |
3009 | (Lisp_Object frame) | |
5f5c8ee5 | 3010 | { |
2a14f83b DA |
3011 | redraw_frame (decode_live_frame (frame)); |
3012 | return Qnil; | |
5f5c8ee5 GM |
3013 | } |
3014 | ||
5f5c8ee5 | 3015 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", |
7ee72033 | 3016 | doc: /* Clear and redisplay all visible frames. */) |
5842a27b | 3017 | (void) |
5f5c8ee5 GM |
3018 | { |
3019 | Lisp_Object tail, frame; | |
3020 | ||
3021 | FOR_EACH_FRAME (tail, frame) | |
3022 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
2a14f83b | 3023 | redraw_frame (XFRAME (frame)); |
5f5c8ee5 GM |
3024 | |
3025 | return Qnil; | |
3026 | } | |
3027 | ||
3028 | ||
5f5c8ee5 | 3029 | \f |
5f5c8ee5 GM |
3030 | /*********************************************************************** |
3031 | Frame Update | |
3032 | ***********************************************************************/ | |
4588ec20 | 3033 | |
5f5c8ee5 | 3034 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 3035 | |
59ea14cd PE |
3036 | If FORCE_P, don't let redisplay be stopped by detecting pending input. |
3037 | If INHIBIT_HAIRY_ID_P, don't try scrolling. | |
177c0ea7 | 3038 | |
59ea14cd | 3039 | Value is true if redisplay was stopped due to pending input. */ |
4588ec20 | 3040 | |
59ea14cd PE |
3041 | bool |
3042 | update_frame (struct frame *f, bool force_p, bool inhibit_hairy_id_p) | |
5f5c8ee5 | 3043 | { |
59ea14cd PE |
3044 | /* True means display has been paused because of pending input. */ |
3045 | bool paused_p; | |
e69b0960 | 3046 | struct window *root_window = XWINDOW (f->root_window); |
5f5c8ee5 | 3047 | |
a2130dbb KS |
3048 | if (redisplay_dont_pause) |
3049 | force_p = 1; | |
6fd326b7 | 3050 | else if (!force_p && detect_input_pending_ignore_squeezables ()) |
d012c62b | 3051 | { |
6fd326b7 DA |
3052 | paused_p = 1; |
3053 | goto do_pause; | |
d012c62b | 3054 | } |
d012c62b | 3055 | |
5f5c8ee5 | 3056 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3057 | { |
5f5c8ee5 GM |
3058 | /* We are working on window matrix basis. All windows whose |
3059 | flag must_be_updated_p is set have to be updated. */ | |
3060 | ||
3061 | /* Record that we are not working on frame matrices. */ | |
3062 | set_frame_matrix_frame (NULL); | |
3063 | ||
3064 | /* Update all windows in the window tree of F, maybe stopping | |
3065 | when pending input is detected. */ | |
3066 | update_begin (f); | |
3067 | ||
5a49b79c | 3068 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
3069 | /* Update the menu bar on X frames that don't have toolkit |
3070 | support. */ | |
e69b0960 DA |
3071 | if (WINDOWP (f->menu_bar_window)) |
3072 | update_window (XWINDOW (f->menu_bar_window), 1); | |
5a49b79c | 3073 | #endif |
5f5c8ee5 GM |
3074 | |
3075 | /* Update the tool-bar window, if present. */ | |
e69b0960 | 3076 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3077 | { |
e69b0960 | 3078 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3079 | |
3080 | /* Update tool-bar window. */ | |
3081 | if (w->must_be_updated_p) | |
4588ec20 | 3082 | { |
153a073c PJ |
3083 | Lisp_Object tem; |
3084 | ||
5f5c8ee5 GM |
3085 | update_window (w, 1); |
3086 | w->must_be_updated_p = 0; | |
3087 | ||
3088 | /* Swap tool-bar strings. We swap because we want to | |
3089 | reuse strings. */ | |
e69b0960 | 3090 | tem = f->current_tool_bar_string; |
f00af5b1 PE |
3091 | fset_current_tool_bar_string (f, f->desired_tool_bar_string); |
3092 | fset_desired_tool_bar_string (f, tem); | |
4588ec20 JB |
3093 | } |
3094 | } | |
177c0ea7 | 3095 | |
5f5c8ee5 GM |
3096 | |
3097 | /* Update windows. */ | |
3098 | paused_p = update_window_tree (root_window, force_p); | |
3099 | update_end (f); | |
177c0ea7 | 3100 | |
6b61353c | 3101 | /* This flush is a performance bottleneck under X, |
e581a466 | 3102 | and it doesn't seem to be necessary anyway (in general). |
6b61353c | 3103 | It is necessary when resizing the window with the mouse, or |
e581a466 | 3104 | at least the fringes are not redrawn in a timely manner. ++kfs */ |
6b61353c | 3105 | if (f->force_flush_display_p) |
e581a466 KL |
3106 | { |
3107 | FRAME_RIF (f)->flush_display (f); | |
3108 | f->force_flush_display_p = 0; | |
3109 | } | |
4588ec20 | 3110 | } |
5f5c8ee5 GM |
3111 | else |
3112 | { | |
3113 | /* We are working on frame matrix basis. Set the frame on whose | |
3114 | frame matrix we operate. */ | |
3115 | set_frame_matrix_frame (f); | |
3116 | ||
868dd24b | 3117 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3118 | build_frame_matrix (f); |
177c0ea7 | 3119 | |
868dd24b GM |
3120 | /* Update the display */ |
3121 | update_begin (f); | |
5f5c8ee5 | 3122 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3123 | update_end (f); |
3124 | ||
7d2f1216 | 3125 | if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f)) |
3224dac1 | 3126 | { |
0b0d3e0b KL |
3127 | if (FRAME_TTY (f)->termscript) |
3128 | fflush (FRAME_TTY (f)->termscript); | |
7d2f1216 EZ |
3129 | if (FRAME_TERMCAP_P (f)) |
3130 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3131 | } |
868dd24b | 3132 | |
5f5c8ee5 | 3133 | /* Check window matrices for lost pointers. */ |
e509cfa6 | 3134 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
3135 | check_window_matrix_pointers (root_window); |
3136 | add_frame_display_history (f, paused_p); | |
3137 | #endif | |
5f5c8ee5 GM |
3138 | } |
3139 | ||
993d4ab6 | 3140 | do_pause: |
5f5c8ee5 GM |
3141 | /* Reset flags indicating that a window should be updated. */ |
3142 | set_window_update_flags (root_window, 0); | |
177c0ea7 | 3143 | |
868dd24b | 3144 | display_completed = !paused_p; |
5f5c8ee5 | 3145 | return paused_p; |
4588ec20 | 3146 | } |
5f5c8ee5 GM |
3147 | |
3148 | ||
4588ec20 | 3149 | \f |
5f5c8ee5 GM |
3150 | /************************************************************************ |
3151 | Window-based updates | |
3152 | ************************************************************************/ | |
3153 | ||
59ea14cd PE |
3154 | /* Perform updates in window tree rooted at W. |
3155 | If FORCE_P, don't stop updating if input is pending. */ | |
5f5c8ee5 | 3156 | |
59ea14cd PE |
3157 | static bool |
3158 | update_window_tree (struct window *w, bool force_p) | |
5f5c8ee5 | 3159 | { |
59ea14cd | 3160 | bool paused_p = 0; |
177c0ea7 | 3161 | |
5f5c8ee5 GM |
3162 | while (w && !paused_p) |
3163 | { | |
e74aeda8 DA |
3164 | if (WINDOWP (w->contents)) |
3165 | paused_p |= update_window_tree (XWINDOW (w->contents), force_p); | |
5f5c8ee5 GM |
3166 | else if (w->must_be_updated_p) |
3167 | paused_p |= update_window (w, force_p); | |
3168 | ||
d3d50620 | 3169 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
3170 | } |
3171 | ||
3172 | return paused_p; | |
3173 | } | |
3174 | ||
3175 | ||
59ea14cd PE |
3176 | /* Update window W if its flag must_be_updated_p is set. |
3177 | If FORCE_P, don't stop updating if input is pending. */ | |
5f5c8ee5 GM |
3178 | |
3179 | void | |
59ea14cd | 3180 | update_single_window (struct window *w, bool force_p) |
5f5c8ee5 GM |
3181 | { |
3182 | if (w->must_be_updated_p) | |
3183 | { | |
3184 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
3185 | ||
3186 | /* Record that this is not a frame-based redisplay. */ | |
3187 | set_frame_matrix_frame (NULL); | |
3188 | ||
a2130dbb KS |
3189 | if (redisplay_dont_pause) |
3190 | force_p = 1; | |
d012c62b | 3191 | |
5f5c8ee5 GM |
3192 | /* Update W. */ |
3193 | update_begin (f); | |
3194 | update_window (w, force_p); | |
3195 | update_end (f); | |
4588ec20 | 3196 | |
5f5c8ee5 GM |
3197 | /* Reset flag in W. */ |
3198 | w->must_be_updated_p = 0; | |
3199 | } | |
3200 | } | |
4588ec20 | 3201 | |
93e023fc | 3202 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 3203 | |
408f5064 GM |
3204 | /* Redraw lines from the current matrix of window W that are |
3205 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
3206 | ||
3207 | static void | |
971de7fb | 3208 | redraw_overlapped_rows (struct window *w, int yb) |
408f5064 | 3209 | { |
d8ee7803 | 3210 | int i; |
fa971ac3 | 3211 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3fc809e2 | 3212 | |
408f5064 GM |
3213 | /* If rows overlapping others have been changed, the rows being |
3214 | overlapped have to be redrawn. This won't draw lines that have | |
3215 | already been drawn in update_window_line because overlapped_p in | |
3216 | desired rows is 0, so after row assignment overlapped_p in | |
3217 | current rows is 0. */ | |
3218 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
3219 | { | |
e876ff42 | 3220 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
3221 | |
3222 | if (!row->enabled_p) | |
3223 | break; | |
3224 | else if (row->mode_line_p) | |
3225 | continue; | |
177c0ea7 | 3226 | |
408f5064 GM |
3227 | if (row->overlapped_p) |
3228 | { | |
3229 | enum glyph_row_area area; | |
177c0ea7 | 3230 | |
408f5064 GM |
3231 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
3232 | { | |
3233 | updated_row = row; | |
3234 | updated_area = area; | |
fa971ac3 KL |
3235 | FRAME_RIF (f)->cursor_to (i, 0, row->y, |
3236 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 3237 | if (row->used[area]) |
fa971ac3 KL |
3238 | FRAME_RIF (f)->write_glyphs (row->glyphs[area], |
3239 | row->used[area]); | |
3240 | FRAME_RIF (f)->clear_end_of_line (-1); | |
408f5064 | 3241 | } |
177c0ea7 | 3242 | |
408f5064 GM |
3243 | row->overlapped_p = 0; |
3244 | } | |
3245 | ||
e876ff42 | 3246 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
3247 | break; |
3248 | } | |
3249 | } | |
3250 | ||
3251 | ||
3252 | /* Redraw lines from the current matrix of window W that overlap | |
3253 | others. YB is bottom-most y-position in W. */ | |
3254 | ||
3255 | static void | |
971de7fb | 3256 | redraw_overlapping_rows (struct window *w, int yb) |
408f5064 GM |
3257 | { |
3258 | int i, bottom_y; | |
3259 | struct glyph_row *row; | |
fa971ac3 | 3260 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
3fc809e2 | 3261 | |
408f5064 GM |
3262 | for (i = 0; i < w->current_matrix->nrows; ++i) |
3263 | { | |
3264 | row = w->current_matrix->rows + i; | |
3265 | ||
3266 | if (!row->enabled_p) | |
3267 | break; | |
3268 | else if (row->mode_line_p) | |
3269 | continue; | |
177c0ea7 | 3270 | |
408f5064 GM |
3271 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
3272 | ||
b4b2c2ca | 3273 | if (row->overlapping_p) |
408f5064 | 3274 | { |
41124e06 YM |
3275 | int overlaps = 0; |
3276 | ||
b4b2c2ca | 3277 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) && i > 0 |
41124e06 YM |
3278 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) |
3279 | overlaps |= OVERLAPS_PRED; | |
b4b2c2ca | 3280 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) && bottom_y < yb |
41124e06 YM |
3281 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) |
3282 | overlaps |= OVERLAPS_SUCC; | |
3283 | ||
3284 | if (overlaps) | |
3285 | { | |
3286 | if (row->used[LEFT_MARGIN_AREA]) | |
3287 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
3288 | ||
3289 | if (row->used[TEXT_AREA]) | |
3290 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
3291 | ||
3292 | if (row->used[RIGHT_MARGIN_AREA]) | |
3293 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
3294 | ||
c5e87d10 | 3295 | /* Record in neighbor rows that ROW overwrites part of |
41124e06 YM |
3296 | their display. */ |
3297 | if (overlaps & OVERLAPS_PRED) | |
3298 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
3299 | if (overlaps & OVERLAPS_SUCC) | |
3300 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
3301 | } | |
408f5064 GM |
3302 | } |
3303 | ||
3304 | if (bottom_y >= yb) | |
3305 | break; | |
3306 | } | |
3307 | } | |
3308 | ||
93e023fc KS |
3309 | #endif /* HAVE_WINDOW_SYSTEM */ |
3310 | ||
408f5064 | 3311 | |
09ad5a91 | 3312 | #if defined GLYPH_DEBUG && 0 |
93962bfa GM |
3313 | |
3314 | /* Check that no row in the current matrix of window W is enabled | |
3315 | which is below what's displayed in the window. */ | |
3316 | ||
09ad5a91 | 3317 | static void |
971de7fb | 3318 | check_current_matrix_flags (struct window *w) |
93962bfa | 3319 | { |
59ea14cd | 3320 | bool last_seen_p = 0; |
93962bfa GM |
3321 | int i, yb = window_text_bottom_y (w); |
3322 | ||
3323 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
3324 | { | |
3325 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
3326 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3327 | last_seen_p = 1; | |
3328 | else if (last_seen_p && row->enabled_p) | |
1088b922 | 3329 | emacs_abort (); |
93962bfa GM |
3330 | } |
3331 | } | |
3332 | ||
3333 | #endif /* GLYPH_DEBUG */ | |
3334 | ||
3335 | ||
59ea14cd PE |
3336 | /* Update display of window W. |
3337 | If FORCE_P, don't stop updating when input is pending. */ | |
5f5c8ee5 | 3338 | |
59ea14cd PE |
3339 | static bool |
3340 | update_window (struct window *w, bool force_p) | |
4588ec20 | 3341 | { |
5f5c8ee5 | 3342 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
59ea14cd | 3343 | bool paused_p; |
5f5c8ee5 | 3344 | int preempt_count = baud_rate / 2400 + 1; |
597cfb3f | 3345 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
e509cfa6 | 3346 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 3347 | /* Check that W's frame doesn't have glyph matrices. */ |
a54e2c05 | 3348 | eassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 3349 | #endif |
5f5c8ee5 GM |
3350 | |
3351 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb | 3352 | if (!force_p) |
a2d5fca0 | 3353 | detect_input_pending_ignore_squeezables (); |
4588ec20 | 3354 | |
5f5c8ee5 GM |
3355 | /* If forced to complete the update, or if no input is pending, do |
3356 | the update. */ | |
8fd9a666 | 3357 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 3358 | { |
5f5c8ee5 GM |
3359 | struct glyph_row *row, *end; |
3360 | struct glyph_row *mode_line_row; | |
56974e03 | 3361 | struct glyph_row *header_line_row; |
59ea14cd PE |
3362 | int yb; |
3363 | bool changed_p = 0, mouse_face_overwritten_p = 0; | |
0bc32927 | 3364 | int n_updated = 0; |
5f5c8ee5 GM |
3365 | |
3366 | rif->update_window_begin_hook (w); | |
3367 | yb = window_text_bottom_y (w); | |
138c0ae8 EZ |
3368 | row = MATRIX_ROW (desired_matrix, 0); |
3369 | end = MATRIX_MODE_LINE_ROW (desired_matrix); | |
177c0ea7 | 3370 | |
394305db EZ |
3371 | /* Take note of the header line, if there is one. We will |
3372 | update it below, after updating all of the window's lines. */ | |
5f5c8ee5 | 3373 | if (row->mode_line_p) |
56974e03 GM |
3374 | { |
3375 | header_line_row = row; | |
3376 | ++row; | |
3377 | } | |
3378 | else | |
3379 | header_line_row = NULL; | |
5f5c8ee5 GM |
3380 | |
3381 | /* Update the mode line, if necessary. */ | |
3382 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
3383 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
3384 | { | |
3385 | mode_line_row->y = yb; | |
3386 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
3387 | desired_matrix), |
3388 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3389 | } |
3390 | ||
3391 | /* Find first enabled row. Optimizations in redisplay_internal | |
3392 | may lead to an update with only one row enabled. There may | |
3393 | be also completely empty matrices. */ | |
3394 | while (row < end && !row->enabled_p) | |
3395 | ++row; | |
177c0ea7 | 3396 | |
bfdcafe1 | 3397 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 3398 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
3399 | { |
3400 | int rc = scrolling_window (w, header_line_row != NULL); | |
3401 | if (rc < 0) | |
3402 | { | |
3403 | /* All rows were found to be equal. */ | |
3404 | paused_p = 0; | |
3405 | goto set_cursor; | |
3406 | } | |
3407 | else if (rc > 0) | |
6b61353c KH |
3408 | { |
3409 | /* We've scrolled the display. */ | |
3410 | force_p = 1; | |
3411 | changed_p = 1; | |
3412 | } | |
5f5c8ee5 GM |
3413 | } |
3414 | ||
3415 | /* Update the rest of the lines. */ | |
0bc32927 | 3416 | for (; row < end && (force_p || !input_pending); ++row) |
394305db EZ |
3417 | /* scrolling_window resets the enabled_p flag of the rows it |
3418 | reuses from current_matrix. */ | |
b7412313 | 3419 | if (row->enabled_p) |
5f5c8ee5 GM |
3420 | { |
3421 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
3422 | int i; | |
177c0ea7 | 3423 | |
153a073c | 3424 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
3425 | detect_input_pending. If it's done too often, |
3426 | scrolling large windows with repeated scroll-up | |
3427 | commands will too quickly pause redisplay. */ | |
e87b8809 | 3428 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 3429 | detect_input_pending_ignore_squeezables (); |
e876ff42 GM |
3430 | changed_p |= update_window_line (w, vpos, |
3431 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3432 | |
3433 | /* Mark all rows below the last visible one in the current | |
3434 | matrix as invalid. This is necessary because of | |
3435 | variable line heights. Consider the case of three | |
3436 | successive redisplays, where the first displays 5 | |
3437 | lines, the second 3 lines, and the third 5 lines again. | |
3438 | If the second redisplay wouldn't mark rows in the | |
3439 | current matrix invalid, the third redisplay might be | |
3440 | tempted to optimize redisplay based on lines displayed | |
3441 | in the first redisplay. */ | |
3442 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3443 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
3444 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
3445 | } | |
3446 | ||
3447 | /* Was display preempted? */ | |
3448 | paused_p = row < end; | |
177c0ea7 | 3449 | |
56974e03 | 3450 | set_cursor: |
177c0ea7 | 3451 | |
6b61353c KH |
3452 | /* Update the header line after scrolling because a new header |
3453 | line would otherwise overwrite lines at the top of the window | |
3454 | that can be scrolled. */ | |
3455 | if (header_line_row && header_line_row->enabled_p) | |
3456 | { | |
3457 | header_line_row->y = 0; | |
3458 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
6b61353c KH |
3459 | } |
3460 | ||
153a073c | 3461 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
3462 | if (!paused_p && !w->pseudo_window_p) |
3463 | { | |
93e023fc | 3464 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
3465 | if (changed_p && rif->fix_overlapping_area) |
3466 | { | |
3467 | redraw_overlapped_rows (w, yb); | |
3468 | redraw_overlapping_rows (w, yb); | |
3469 | } | |
93e023fc | 3470 | #endif |
177c0ea7 | 3471 | |
5f5c8ee5 GM |
3472 | /* Make cursor visible at cursor position of W. */ |
3473 | set_window_cursor_after_update (w); | |
3474 | ||
e876ff42 GM |
3475 | #if 0 /* Check that current matrix invariants are satisfied. This is |
3476 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
3477 | IF_DEBUG (check_matrix_invariants (w)); |
3478 | #endif | |
4588ec20 | 3479 | } |
5f5c8ee5 | 3480 | |
e509cfa6 | 3481 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
3482 | /* Remember the redisplay method used to display the matrix. */ |
3483 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
3484 | #endif | |
408f5064 | 3485 | |
6b61353c KH |
3486 | #ifdef HAVE_WINDOW_SYSTEM |
3487 | update_window_fringes (w, 0); | |
3488 | #endif | |
3489 | ||
56974e03 GM |
3490 | /* End the update of window W. Don't set the cursor if we |
3491 | paused updating the display because in this case, | |
3492 | set_window_cursor_after_update hasn't been called, and | |
3493 | output_cursor doesn't contain the cursor location. */ | |
3494 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); | |
4588ec20 | 3495 | } |
5f5c8ee5 GM |
3496 | else |
3497 | paused_p = 1; | |
3498 | ||
e509cfa6 | 3499 | #ifdef GLYPH_DEBUG |
0cffd9d8 | 3500 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
3501 | add_window_display_history (w, w->current_matrix->method, paused_p); |
3502 | #endif | |
177c0ea7 | 3503 | |
5f5c8ee5 | 3504 | clear_glyph_matrix (desired_matrix); |
408f5064 | 3505 | |
5f5c8ee5 | 3506 | return paused_p; |
4588ec20 JB |
3507 | } |
3508 | ||
b64b3980 | 3509 | |
5f5c8ee5 GM |
3510 | /* Update the display of area AREA in window W, row number VPOS. |
3511 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
3512 | ||
3513 | static void | |
971de7fb | 3514 | update_marginal_area (struct window *w, int area, int vpos) |
b64b3980 | 3515 | { |
5f5c8ee5 | 3516 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 3517 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
3518 | |
3519 | /* Let functions in xterm.c know what area subsequent X positions | |
3520 | will be relative to. */ | |
3521 | updated_area = area; | |
3522 | ||
3523 | /* Set cursor to start of glyphs, write them, and clear to the end | |
3524 | of the area. I don't think that something more sophisticated is | |
3525 | necessary here, since marginal areas will not be the default. */ | |
3526 | rif->cursor_to (vpos, 0, desired_row->y, 0); | |
3527 | if (desired_row->used[area]) | |
3528 | rif->write_glyphs (desired_row->glyphs[area], desired_row->used[area]); | |
3529 | rif->clear_end_of_line (-1); | |
b64b3980 | 3530 | } |
23b0200c | 3531 | |
352f1545 | 3532 | |
408f5064 | 3533 | /* Update the display of the text area of row VPOS in window W. |
59ea14cd | 3534 | Value is true if display has changed. */ |
5f5c8ee5 | 3535 | |
59ea14cd | 3536 | static bool |
971de7fb | 3537 | update_text_area (struct window *w, int vpos) |
23b0200c | 3538 | { |
5f5c8ee5 GM |
3539 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
3540 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3541 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
59ea14cd | 3542 | bool changed_p = 0; |
5f5c8ee5 GM |
3543 | |
3544 | /* Let functions in xterm.c know what area subsequent X positions | |
3545 | will be relative to. */ | |
3546 | updated_area = TEXT_AREA; | |
177c0ea7 | 3547 | |
5f5c8ee5 GM |
3548 | /* If rows are at different X or Y, or rows have different height, |
3549 | or the current row is marked invalid, write the entire line. */ | |
3550 | if (!current_row->enabled_p | |
3551 | || desired_row->y != current_row->y | |
3552 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
3553 | || desired_row->phys_ascent != current_row->phys_ascent |
3554 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 3555 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 3556 | || current_row->overlapped_p |
fee8b690 CY |
3557 | /* This next line is necessary for correctly redrawing |
3558 | mouse-face areas after scrolling and other operations. | |
3559 | However, it causes excessive flickering when mouse is moved | |
3560 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
3561 | line doesn't seem to hurt anything. -- cyd. |
3562 | But it is still needed for the header line. -- kfs. */ | |
3563 | || (current_row->mouse_face_p | |
3564 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
3565 | || current_row->x != desired_row->x) |
3566 | { | |
3567 | rif->cursor_to (vpos, 0, desired_row->y, desired_row->x); | |
177c0ea7 | 3568 | |
5f5c8ee5 GM |
3569 | if (desired_row->used[TEXT_AREA]) |
3570 | rif->write_glyphs (desired_row->glyphs[TEXT_AREA], | |
3571 | desired_row->used[TEXT_AREA]); | |
177c0ea7 | 3572 | |
5f5c8ee5 GM |
3573 | /* Clear to end of window. */ |
3574 | rif->clear_end_of_line (-1); | |
408f5064 | 3575 | changed_p = 1; |
60f2f3f1 GM |
3576 | |
3577 | /* This erases the cursor. We do this here because | |
3578 | notice_overwritten_cursor cannot easily check this, which | |
3579 | might indicate that the whole functionality of | |
3580 | notice_overwritten_cursor would better be implemented here. | |
3581 | On the other hand, we need notice_overwritten_cursor as long | |
3582 | as mouse highlighting is done asynchronously outside of | |
3583 | redisplay. */ | |
3584 | if (vpos == w->phys_cursor.vpos) | |
3585 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
3586 | } |
3587 | else | |
3588 | { | |
3589 | int stop, i, x; | |
3590 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
3591 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
59ea14cd | 3592 | bool overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 3593 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
59ea14cd | 3594 | bool abort_skipping = 0; |
5f5c8ee5 | 3595 | |
78897758 YM |
3596 | /* If the desired row extends its face to the text area end, and |
3597 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
3598 | make sure we write at least one glyph, so that the face |
3599 | extension actually takes place. */ | |
78897758 YM |
3600 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
3601 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
3602 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
3603 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 3604 | --desired_stop_pos; |
177c0ea7 | 3605 | |
5f5c8ee5 GM |
3606 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
3607 | i = 0; | |
3608 | x = desired_row->x; | |
8399f8a0 GM |
3609 | |
3610 | /* Loop over glyphs that current and desired row may have | |
3611 | in common. */ | |
5f5c8ee5 | 3612 | while (i < stop) |
352f1545 | 3613 | { |
59ea14cd | 3614 | bool can_skip_p = !abort_skipping; |
177c0ea7 | 3615 | |
5f5c8ee5 | 3616 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
3617 | don't have to be written. We can't skip if the last |
3618 | current glyph overlaps the glyph to its right. For | |
3619 | example, consider a current row of `if ' with the `f' in | |
3620 | Courier bold so that it overlaps the ` ' to its right. | |
3621 | If the desired row is ` ', we would skip over the space | |
3622 | after the `if' and there would remain a pixel from the | |
3623 | `f' on the screen. */ | |
3624 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 3625 | { |
e47306e6 GM |
3626 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
3627 | int left, right; | |
177c0ea7 | 3628 | |
d3d50620 | 3629 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
e47306e6 | 3630 | &left, &right); |
91d227d9 | 3631 | can_skip_p = (right == 0 && !abort_skipping); |
352f1545 | 3632 | } |
177c0ea7 | 3633 | |
6d950f4c | 3634 | if (can_skip_p) |
352f1545 | 3635 | { |
91d227d9 CY |
3636 | int start_hpos = i; |
3637 | ||
6d950f4c GM |
3638 | while (i < stop |
3639 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
3640 | { | |
3641 | x += desired_glyph->pixel_width; | |
3642 | ++desired_glyph, ++current_glyph, ++i; | |
3643 | } | |
3644 | ||
3645 | /* Consider the case that the current row contains "xxx | |
3646 | ppp ggg" in italic Courier font, and the desired row | |
3647 | is "xxx ggg". The character `p' has lbearing, `g' | |
3648 | has not. The loop above will stop in front of the | |
3649 | first `p' in the current row. If we would start | |
3650 | writing glyphs there, we wouldn't erase the lbearing | |
3651 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 3652 | taken care of by draw_glyphs. */ |
6d950f4c GM |
3653 | if (overlapping_glyphs_p |
3654 | && i > 0 | |
3655 | && i < current_row->used[TEXT_AREA] | |
3656 | && (current_row->used[TEXT_AREA] | |
3657 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 3658 | { |
6d950f4c | 3659 | int left, right; |
177c0ea7 | 3660 | |
3a45383a | 3661 | rif->get_glyph_overhangs (current_glyph, |
d3d50620 | 3662 | XFRAME (w->frame), |
6d950f4c GM |
3663 | &left, &right); |
3664 | while (left > 0 && i > 0) | |
3665 | { | |
3666 | --i, --desired_glyph, --current_glyph; | |
3667 | x -= desired_glyph->pixel_width; | |
3668 | left -= desired_glyph->pixel_width; | |
3669 | } | |
91d227d9 CY |
3670 | |
3671 | /* Abort the skipping algorithm if we end up before | |
3672 | our starting point, to avoid looping (bug#1070). | |
3673 | This can happen when the lbearing is larger than | |
3674 | the pixel width. */ | |
3675 | abort_skipping = (i < start_hpos); | |
5f5c8ee5 | 3676 | } |
352f1545 | 3677 | } |
177c0ea7 | 3678 | |
5f5c8ee5 GM |
3679 | /* Try to avoid writing the entire rest of the desired row |
3680 | by looking for a resync point. This mainly prevents | |
3681 | mode line flickering in the case the mode line is in | |
3682 | fixed-pitch font, which it usually will be. */ | |
3683 | if (i < desired_row->used[TEXT_AREA]) | |
3684 | { | |
3685 | int start_x = x, start_hpos = i; | |
3686 | struct glyph *start = desired_glyph; | |
3687 | int current_x = x; | |
59ea14cd | 3688 | bool skip_first_p = !can_skip_p; |
6d950f4c | 3689 | |
5f5c8ee5 GM |
3690 | /* Find the next glyph that's equal again. */ |
3691 | while (i < stop | |
6d950f4c GM |
3692 | && (skip_first_p |
3693 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
3694 | && x == current_x) |
3695 | { | |
3696 | x += desired_glyph->pixel_width; | |
3697 | current_x += current_glyph->pixel_width; | |
3698 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 3699 | skip_first_p = 0; |
5f5c8ee5 | 3700 | } |
23b0200c | 3701 | |
5f5c8ee5 GM |
3702 | if (i == start_hpos || x != current_x) |
3703 | { | |
3704 | i = start_hpos; | |
3705 | x = start_x; | |
3706 | desired_glyph = start; | |
3707 | break; | |
3708 | } | |
e47306e6 | 3709 | |
5f5c8ee5 GM |
3710 | rif->cursor_to (vpos, start_hpos, desired_row->y, start_x); |
3711 | rif->write_glyphs (start, i - start_hpos); | |
408f5064 | 3712 | changed_p = 1; |
5f5c8ee5 GM |
3713 | } |
3714 | } | |
177c0ea7 | 3715 | |
5f5c8ee5 GM |
3716 | /* Write the rest. */ |
3717 | if (i < desired_row->used[TEXT_AREA]) | |
3718 | { | |
3719 | rif->cursor_to (vpos, i, desired_row->y, x); | |
3720 | rif->write_glyphs (desired_glyph, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 3721 | changed_p = 1; |
5f5c8ee5 | 3722 | } |
177c0ea7 | 3723 | |
5f5c8ee5 GM |
3724 | /* Maybe clear to end of line. */ |
3725 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
3726 | { | |
3727 | /* If new row extends to the end of the text area, nothing | |
3728 | has to be cleared, if and only if we did a write_glyphs | |
3729 | above. This is made sure by setting desired_stop_pos | |
3730 | appropriately above. */ | |
a54e2c05 | 3731 | eassert (i < desired_row->used[TEXT_AREA] |
78897758 YM |
3732 | || ((desired_row->used[TEXT_AREA] |
3733 | == current_row->used[TEXT_AREA]) | |
3734 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
3735 | } |
3736 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
3737 | { | |
3738 | /* If old row extends to the end of the text area, clear. */ | |
3739 | if (i >= desired_row->used[TEXT_AREA]) | |
3740 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3741 | desired_row->pixel_width); |
5f5c8ee5 | 3742 | rif->clear_end_of_line (-1); |
408f5064 | 3743 | changed_p = 1; |
5f5c8ee5 GM |
3744 | } |
3745 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 3746 | { |
5f5c8ee5 GM |
3747 | /* Otherwise clear to the end of the old row. Everything |
3748 | after that position should be clear already. */ | |
27786b2f | 3749 | int xlim; |
177c0ea7 | 3750 | |
5f5c8ee5 GM |
3751 | if (i >= desired_row->used[TEXT_AREA]) |
3752 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3753 | desired_row->pixel_width); |
5f5c8ee5 GM |
3754 | |
3755 | /* If cursor is displayed at the end of the line, make sure | |
3756 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
3757 | with which to erase the cursor (because this method | |
3758 | doesn't work with lbearing/rbearing), so we must do it | |
3759 | this way. */ | |
3760 | if (vpos == w->phys_cursor.vpos | |
f951a506 EZ |
3761 | && (desired_row->reversed_p |
3762 | ? (w->phys_cursor.hpos < 0) | |
3763 | : (w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]))) | |
5f5c8ee5 GM |
3764 | { |
3765 | w->phys_cursor_on_p = 0; | |
27786b2f | 3766 | xlim = -1; |
5f5c8ee5 GM |
3767 | } |
3768 | else | |
27786b2f PE |
3769 | xlim = current_row->pixel_width; |
3770 | rif->clear_end_of_line (xlim); | |
408f5064 | 3771 | changed_p = 1; |
2e8907d3 | 3772 | } |
23b0200c | 3773 | } |
408f5064 GM |
3774 | |
3775 | return changed_p; | |
23b0200c | 3776 | } |
4588ec20 | 3777 | |
5f5c8ee5 | 3778 | |
59ea14cd | 3779 | /* Update row VPOS in window W. Value is true if display has been changed. */ |
5f5c8ee5 | 3780 | |
59ea14cd PE |
3781 | static bool |
3782 | update_window_line (struct window *w, int vpos, bool *mouse_face_overwritten_p) | |
5f5c8ee5 GM |
3783 | { |
3784 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
3785 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3786 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
59ea14cd | 3787 | bool changed_p = 0; |
5f5c8ee5 | 3788 | |
5f5c8ee5 GM |
3789 | /* Set the row being updated. This is important to let xterm.c |
3790 | know what line height values are in effect. */ | |
3791 | updated_row = desired_row; | |
3792 | ||
177c0ea7 JB |
3793 | /* A row can be completely invisible in case a desired matrix was |
3794 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
3795 | the matrix. Make sure to make such rows current anyway, since |
3796 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
3797 | if (desired_row->mode_line_p |
3798 | || desired_row->visible_height > 0) | |
408f5064 | 3799 | { |
a54e2c05 | 3800 | eassert (desired_row->enabled_p); |
504805ac GM |
3801 | |
3802 | /* Update display of the left margin area, if there is one. */ | |
3803 | if (!desired_row->full_width_p | |
d3d50620 | 3804 | && !NILP (w->left_margin_cols)) |
504805ac GM |
3805 | { |
3806 | changed_p = 1; | |
3807 | update_marginal_area (w, LEFT_MARGIN_AREA, vpos); | |
e9957956 EZ |
3808 | /* Setting this flag will ensure the vertical border, if |
3809 | any, between this window and the one on its left will be | |
3810 | redrawn. This is necessary because updating the left | |
3811 | margin area can potentially draw over the border. */ | |
3812 | current_row->redraw_fringe_bitmaps_p = 1; | |
504805ac | 3813 | } |
177c0ea7 | 3814 | |
504805ac GM |
3815 | /* Update the display of the text area. */ |
3816 | if (update_text_area (w, vpos)) | |
3817 | { | |
3818 | changed_p = 1; | |
3819 | if (current_row->mouse_face_p) | |
3820 | *mouse_face_overwritten_p = 1; | |
3821 | } | |
177c0ea7 | 3822 | |
504805ac GM |
3823 | /* Update display of the right margin area, if there is one. */ |
3824 | if (!desired_row->full_width_p | |
d3d50620 | 3825 | && !NILP (w->right_margin_cols)) |
504805ac GM |
3826 | { |
3827 | changed_p = 1; | |
3828 | update_marginal_area (w, RIGHT_MARGIN_AREA, vpos); | |
3829 | } | |
177c0ea7 | 3830 | |
504805ac GM |
3831 | /* Draw truncation marks etc. */ |
3832 | if (!current_row->enabled_p | |
3833 | || desired_row->y != current_row->y | |
3834 | || desired_row->visible_height != current_row->visible_height | |
6b61353c | 3835 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 3836 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
6b61353c | 3837 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 3838 | || desired_row->mode_line_p != current_row->mode_line_p |
6b61353c | 3839 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
3840 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
3841 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
3842 | rif->after_update_window_line_hook (desired_row); | |
408f5064 | 3843 | } |
177c0ea7 | 3844 | |
5f5c8ee5 GM |
3845 | /* Update current_row from desired_row. */ |
3846 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
3847 | updated_row = NULL; | |
408f5064 | 3848 | return changed_p; |
5f5c8ee5 GM |
3849 | } |
3850 | ||
3851 | ||
3852 | /* Set the cursor after an update of window W. This function may only | |
3853 | be called from update_window. */ | |
3854 | ||
3855 | static void | |
971de7fb | 3856 | set_window_cursor_after_update (struct window *w) |
4588ec20 | 3857 | { |
d3d50620 | 3858 | struct frame *f = XFRAME (w->frame); |
fa971ac3 | 3859 | struct redisplay_interface *rif = FRAME_RIF (f); |
5f5c8ee5 GM |
3860 | int cx, cy, vpos, hpos; |
3861 | ||
3862 | /* Not intended for frame matrix updates. */ | |
a54e2c05 | 3863 | eassert (FRAME_WINDOW_P (f)); |
177c0ea7 | 3864 | |
b96fd3e8 GM |
3865 | if (cursor_in_echo_area |
3866 | && !NILP (echo_area_buffer[0]) | |
3867 | /* If we are showing a message instead of the mini-buffer, | |
3868 | show the cursor for the message instead. */ | |
3869 | && XWINDOW (minibuf_window) == w | |
3870 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
3871 | /* These cases apply only to the frame that contains |
3872 | the active mini-buffer window. */ | |
3873 | && FRAME_HAS_MINIBUF_P (f) | |
3874 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
3875 | { | |
3876 | cx = cy = vpos = hpos = 0; | |
3877 | ||
3878 | if (cursor_in_echo_area >= 0) | |
3879 | { | |
3880 | /* If the mini-buffer is several lines high, find the last | |
3881 | line that has any text on it. Note: either all lines | |
3882 | are enabled or none. Otherwise we wouldn't be able to | |
3883 | determine Y. */ | |
862b4790 GM |
3884 | struct glyph_row *row, *last_row; |
3885 | struct glyph *glyph; | |
3886 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 3887 | |
862b4790 | 3888 | last_row = NULL; |
6206f8ce GM |
3889 | row = w->current_matrix->rows; |
3890 | while (row->enabled_p | |
3891 | && (last_row == NULL | |
3892 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 3893 | { |
862b4790 GM |
3894 | if (row->used[TEXT_AREA] |
3895 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
3896 | last_row = row; | |
6206f8ce | 3897 | ++row; |
862b4790 | 3898 | } |
177c0ea7 | 3899 | |
5f5c8ee5 GM |
3900 | if (last_row) |
3901 | { | |
6206f8ce GM |
3902 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
3903 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 3904 | |
b96fd3e8 | 3905 | while (last > start && last->charpos < 0) |
862b4790 | 3906 | --last; |
177c0ea7 | 3907 | |
862b4790 GM |
3908 | for (glyph = start; glyph < last; ++glyph) |
3909 | { | |
3910 | cx += glyph->pixel_width; | |
3911 | ++hpos; | |
3912 | } | |
3913 | ||
5f5c8ee5 | 3914 | cy = last_row->y; |
862b4790 | 3915 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
3916 | } |
3917 | } | |
3918 | } | |
3919 | else | |
3920 | { | |
3921 | cx = w->cursor.x; | |
3922 | cy = w->cursor.y; | |
3923 | hpos = w->cursor.hpos; | |
3924 | vpos = w->cursor.vpos; | |
3925 | } | |
4588ec20 | 3926 | |
2dd61a9b | 3927 | /* Window cursor can be out of sync for horizontally split windows. |
cccaebd2 | 3928 | Horizontal position is -1 when cursor is on the left fringe. */ |
2dd61a9b DA |
3929 | hpos = clip_to_bounds (-1, hpos, w->current_matrix->matrix_w - 1); |
3930 | vpos = clip_to_bounds (0, vpos, w->current_matrix->nrows - 1); | |
5f5c8ee5 | 3931 | rif->cursor_to (vpos, hpos, cy, cx); |
4588ec20 | 3932 | } |
4588ec20 | 3933 | |
5f5c8ee5 | 3934 | |
6df5d75f GM |
3935 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window |
3936 | tree rooted at W. */ | |
3937 | ||
3938 | void | |
59ea14cd | 3939 | set_window_update_flags (struct window *w, bool on_p) |
6df5d75f GM |
3940 | { |
3941 | while (w) | |
3942 | { | |
e74aeda8 DA |
3943 | if (WINDOWP (w->contents)) |
3944 | set_window_update_flags (XWINDOW (w->contents), on_p); | |
6df5d75f GM |
3945 | else |
3946 | w->must_be_updated_p = on_p; | |
3947 | ||
d3d50620 | 3948 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
6df5d75f | 3949 | } |
177c0ea7 | 3950 | } |
6df5d75f GM |
3951 | |
3952 | ||
3953 | \f | |
3954 | /*********************************************************************** | |
3955 | Window-Based Scrolling | |
3956 | ***********************************************************************/ | |
3957 | ||
3958 | /* Structure describing rows in scrolling_window. */ | |
3959 | ||
3960 | struct row_entry | |
3961 | { | |
3962 | /* Number of occurrences of this row in desired and current matrix. */ | |
3963 | int old_uses, new_uses; | |
177c0ea7 | 3964 | |
6df5d75f GM |
3965 | /* Vpos of row in new matrix. */ |
3966 | int new_line_number; | |
3967 | ||
3968 | /* Bucket index of this row_entry in the hash table row_table. */ | |
ca9ce8f2 | 3969 | ptrdiff_t bucket; |
177c0ea7 | 3970 | |
6df5d75f GM |
3971 | /* The row described by this entry. */ |
3972 | struct glyph_row *row; | |
177c0ea7 | 3973 | |
6df5d75f GM |
3974 | /* Hash collision chain. */ |
3975 | struct row_entry *next; | |
3976 | }; | |
3977 | ||
3978 | /* A pool to allocate row_entry structures from, and the size of the | |
3979 | pool. The pool is reallocated in scrolling_window when we find | |
3980 | that we need a larger one. */ | |
3981 | ||
3982 | static struct row_entry *row_entry_pool; | |
ca9ce8f2 | 3983 | static ptrdiff_t row_entry_pool_size; |
6df5d75f GM |
3984 | |
3985 | /* Index of next free entry in row_entry_pool. */ | |
3986 | ||
ca9ce8f2 | 3987 | static ptrdiff_t row_entry_idx; |
6df5d75f GM |
3988 | |
3989 | /* The hash table used during scrolling, and the table's size. This | |
3990 | table is used to quickly identify equal rows in the desired and | |
3991 | current matrix. */ | |
3992 | ||
3993 | static struct row_entry **row_table; | |
ca9ce8f2 | 3994 | static ptrdiff_t row_table_size; |
6df5d75f GM |
3995 | |
3996 | /* Vectors of pointers to row_entry structures belonging to the | |
3997 | current and desired matrix, and the size of the vectors. */ | |
3998 | ||
3999 | static struct row_entry **old_lines, **new_lines; | |
0065d054 | 4000 | static ptrdiff_t old_lines_size, new_lines_size; |
6df5d75f GM |
4001 | |
4002 | /* A pool to allocate run structures from, and its size. */ | |
4003 | ||
4004 | static struct run *run_pool; | |
0065d054 | 4005 | static ptrdiff_t runs_size; |
6df5d75f GM |
4006 | |
4007 | /* A vector of runs of lines found during scrolling. */ | |
4008 | ||
4009 | static struct run **runs; | |
4010 | ||
6b1f9ba4 | 4011 | /* Add glyph row ROW to the scrolling hash table. */ |
6df5d75f | 4012 | |
b0ab8123 | 4013 | static struct row_entry * |
6b1f9ba4 | 4014 | add_row_entry (struct glyph_row *row) |
6df5d75f GM |
4015 | { |
4016 | struct row_entry *entry; | |
ca9ce8f2 | 4017 | ptrdiff_t i = row->hash % row_table_size; |
177c0ea7 | 4018 | |
6df5d75f | 4019 | entry = row_table[i]; |
a54e2c05 | 4020 | eassert (entry || verify_row_hash (row)); |
6b1f9ba4 | 4021 | while (entry && !row_equal_p (entry->row, row, 1)) |
6df5d75f | 4022 | entry = entry->next; |
177c0ea7 | 4023 | |
6df5d75f GM |
4024 | if (entry == NULL) |
4025 | { | |
4026 | entry = row_entry_pool + row_entry_idx++; | |
4027 | entry->row = row; | |
4028 | entry->old_uses = entry->new_uses = 0; | |
4029 | entry->new_line_number = 0; | |
4030 | entry->bucket = i; | |
4031 | entry->next = row_table[i]; | |
4032 | row_table[i] = entry; | |
4033 | } | |
4034 | ||
4035 | return entry; | |
4036 | } | |
4037 | ||
4038 | ||
5f5c8ee5 | 4039 | /* Try to reuse part of the current display of W by scrolling lines. |
59ea14cd | 4040 | HEADER_LINE_P means W has a header line. |
5f5c8ee5 GM |
4041 | |
4042 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4043 | Technique for Isolating Differences Between Files." It should take | |
4044 | O(N) time. | |
4045 | ||
4046 | A short outline of the steps of the algorithm | |
4047 | ||
4048 | 1. Skip lines equal at the start and end of both matrices. | |
4049 | ||
4050 | 2. Enter rows in the current and desired matrix into a symbol | |
4051 | table, counting how often they appear in both matrices. | |
4052 | ||
4053 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4054 | i.e. we assume that such lines are likely to have been moved. | |
4055 | ||
4056 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4057 | forward and backward. | |
4058 | ||
4059 | Value is | |
4060 | ||
4061 | -1 if all rows were found to be equal. | |
4062 | 0 to indicate that we did not scroll the display, or | |
4063 | 1 if we did scroll. */ | |
4064 | ||
4065 | static int | |
59ea14cd | 4066 | scrolling_window (struct window *w, bool header_line_p) |
4588ec20 | 4067 | { |
5f5c8ee5 GM |
4068 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4069 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4070 | int yb = window_text_bottom_y (w); | |
ca9ce8f2 PE |
4071 | ptrdiff_t i; |
4072 | int j, first_old, first_new, last_old, last_new; | |
4073 | int nruns, run_idx; | |
0065d054 | 4074 | ptrdiff_t n; |
6df5d75f | 4075 | struct row_entry *entry; |
fa971ac3 | 4076 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4077 | |
4078 | /* Skip over rows equal at the start. */ | |
59ea14cd | 4079 | for (i = header_line_p; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4080 | { |
bfdcafe1 GM |
4081 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4082 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4083 | ||
4084 | if (c->enabled_p | |
4085 | && d->enabled_p | |
6b61353c | 4086 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4087 | && c->y == d->y |
4088 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4089 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
6b1f9ba4 | 4090 | && row_equal_p (c, d, 1)) |
bfdcafe1 GM |
4091 | { |
4092 | assign_row (c, d); | |
4093 | d->enabled_p = 0; | |
4094 | } | |
4095 | else | |
4096 | break; | |
5f5c8ee5 | 4097 | } |
4588ec20 | 4098 | |
5f5c8ee5 GM |
4099 | /* Give up if some rows in the desired matrix are not enabled. */ |
4100 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4101 | return -1; | |
177c0ea7 | 4102 | |
5f5c8ee5 GM |
4103 | first_old = first_new = i; |
4104 | ||
4d8ade89 YM |
4105 | /* Set last_new to the index + 1 of the row that reaches the |
4106 | bottom boundary in the desired matrix. Give up if we find a | |
4107 | disabled row before we reach the bottom boundary. */ | |
5f5c8ee5 | 4108 | i = first_new + 1; |
4d8ade89 YM |
4109 | while (i < desired_matrix->nrows - 1) |
4110 | { | |
4111 | int bottom; | |
5f5c8ee5 | 4112 | |
4d8ade89 YM |
4113 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) |
4114 | return 0; | |
4115 | bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)); | |
4116 | if (bottom <= yb) | |
4117 | ++i; | |
4118 | if (bottom >= yb) | |
4119 | break; | |
4120 | } | |
5f5c8ee5 GM |
4121 | |
4122 | last_new = i; | |
4123 | ||
4d8ade89 YM |
4124 | /* Set last_old to the index + 1 of the row that reaches the bottom |
4125 | boundary in the current matrix. We don't look at the enabled | |
4126 | flag here because we plan to reuse part of the display even if | |
4127 | other parts are disabled. */ | |
5f5c8ee5 | 4128 | i = first_old + 1; |
93962bfa GM |
4129 | while (i < current_matrix->nrows - 1) |
4130 | { | |
4131 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4132 | if (bottom <= yb) | |
4133 | ++i; | |
4134 | if (bottom >= yb) | |
4135 | break; | |
4136 | } | |
4137 | ||
5f5c8ee5 GM |
4138 | last_old = i; |
4139 | ||
4140 | /* Skip over rows equal at the bottom. */ | |
4141 | i = last_new; | |
4142 | j = last_old; | |
4143 | while (i - 1 > first_new | |
4144 | && j - 1 > first_old | |
1e5b2111 EZ |
4145 | && MATRIX_ROW (current_matrix, j - 1)->enabled_p |
4146 | && (MATRIX_ROW (current_matrix, j - 1)->y | |
4147 | == MATRIX_ROW (desired_matrix, i - 1)->y) | |
4148 | && !MATRIX_ROW (desired_matrix, i - 1)->redraw_fringe_bitmaps_p | |
6b1f9ba4 | 4149 | && row_equal_p (MATRIX_ROW (desired_matrix, i - 1), |
e4e0bee9 | 4150 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
4151 | --i, --j; |
4152 | last_new = i; | |
4153 | last_old = j; | |
4154 | ||
4155 | /* Nothing to do if all rows are equal. */ | |
4156 | if (last_new == first_new) | |
4157 | return 0; | |
4158 | ||
0065d054 | 4159 | /* Check for integer overflow in size calculation. |
ca9ce8f2 PE |
4160 | |
4161 | If next_almost_prime checks (N) for divisibility by 2..10, then | |
4162 | it can return at most N + 10, e.g., next_almost_prime (1) == 11. | |
4163 | So, set next_almost_prime_increment_max to 10. | |
4164 | ||
4165 | It's just a coincidence that next_almost_prime_increment_max == | |
4166 | NEXT_ALMOST_PRIME_LIMIT - 1. If NEXT_ALMOST_PRIME_LIMIT were | |
4167 | 13, then next_almost_prime_increment_max would be 14, e.g., | |
4168 | because next_almost_prime (113) would be 127. */ | |
4169 | { | |
4170 | verify (NEXT_ALMOST_PRIME_LIMIT == 11); | |
4171 | enum { next_almost_prime_increment_max = 10 }; | |
ca9ce8f2 | 4172 | ptrdiff_t row_table_max = |
0065d054 PE |
4173 | (min (PTRDIFF_MAX, SIZE_MAX) / (3 * sizeof *row_table) |
4174 | - next_almost_prime_increment_max); | |
4175 | ptrdiff_t current_nrows_max = row_table_max - desired_matrix->nrows; | |
4176 | if (current_nrows_max < current_matrix->nrows) | |
ca9ce8f2 PE |
4177 | memory_full (SIZE_MAX); |
4178 | } | |
4179 | ||
6df5d75f | 4180 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 4181 | |
6df5d75f | 4182 | if (current_matrix->nrows > old_lines_size) |
0065d054 PE |
4183 | old_lines = xpalloc (old_lines, &old_lines_size, |
4184 | current_matrix->nrows - old_lines_size, | |
4185 | INT_MAX, sizeof *old_lines); | |
177c0ea7 | 4186 | |
6df5d75f | 4187 | if (desired_matrix->nrows > new_lines_size) |
0065d054 PE |
4188 | new_lines = xpalloc (new_lines, &new_lines_size, |
4189 | desired_matrix->nrows - new_lines_size, | |
4190 | INT_MAX, sizeof *new_lines); | |
6df5d75f | 4191 | |
ca9ce8f2 PE |
4192 | n = desired_matrix->nrows; |
4193 | n += current_matrix->nrows; | |
0065d054 | 4194 | if (row_table_size < 3 * n) |
6df5d75f | 4195 | { |
ca9ce8f2 | 4196 | ptrdiff_t size = next_almost_prime (3 * n); |
0065d054 | 4197 | row_table = xnrealloc (row_table, size, sizeof *row_table); |
ca9ce8f2 | 4198 | row_table_size = size; |
0065d054 | 4199 | memset (row_table, 0, size * sizeof *row_table); |
6df5d75f GM |
4200 | } |
4201 | ||
4202 | if (n > row_entry_pool_size) | |
0065d054 PE |
4203 | row_entry_pool = xpalloc (row_entry_pool, &row_entry_pool_size, |
4204 | n - row_entry_pool_size, | |
4205 | -1, sizeof *row_entry_pool); | |
6df5d75f GM |
4206 | |
4207 | if (desired_matrix->nrows > runs_size) | |
4208 | { | |
0065d054 PE |
4209 | runs = xnrealloc (runs, desired_matrix->nrows, sizeof *runs); |
4210 | run_pool = xnrealloc (run_pool, desired_matrix->nrows, sizeof *run_pool); | |
ca9ce8f2 | 4211 | runs_size = desired_matrix->nrows; |
6df5d75f GM |
4212 | } |
4213 | ||
4214 | nruns = run_idx = 0; | |
4215 | row_entry_idx = 0; | |
4216 | ||
4217 | /* Add rows from the current and desired matrix to the hash table | |
4218 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 4219 | |
5f5c8ee5 GM |
4220 | for (i = first_old; i < last_old; ++i) |
4221 | { | |
4222 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
4223 | { | |
6b1f9ba4 | 4224 | entry = add_row_entry (MATRIX_ROW (current_matrix, i)); |
6df5d75f GM |
4225 | old_lines[i] = entry; |
4226 | ++entry->old_uses; | |
5f5c8ee5 GM |
4227 | } |
4228 | else | |
6df5d75f | 4229 | old_lines[i] = NULL; |
5f5c8ee5 GM |
4230 | } |
4231 | ||
5f5c8ee5 GM |
4232 | for (i = first_new; i < last_new; ++i) |
4233 | { | |
a54e2c05 | 4234 | eassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); |
6b1f9ba4 | 4235 | entry = add_row_entry (MATRIX_ROW (desired_matrix, i)); |
6df5d75f GM |
4236 | ++entry->new_uses; |
4237 | entry->new_line_number = i; | |
4238 | new_lines[i] = entry; | |
5f5c8ee5 | 4239 | } |
4588ec20 | 4240 | |
5f5c8ee5 GM |
4241 | /* Identify moves based on lines that are unique and equal |
4242 | in both matrices. */ | |
4243 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
4244 | if (old_lines[i] |
4245 | && old_lines[i]->old_uses == 1 | |
4246 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 | 4247 | { |
27786b2f | 4248 | int p, q; |
6df5d75f GM |
4249 | int new_line = old_lines[i]->new_line_number; |
4250 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
4251 | |
4252 | /* Record move. */ | |
4253 | run->current_vpos = i; | |
4254 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
4255 | run->desired_vpos = new_line; | |
4256 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
4257 | run->nrows = 1; | |
4258 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
4259 | ||
4260 | /* Extend backward. */ | |
27786b2f PE |
4261 | p = i - 1; |
4262 | q = new_line - 1; | |
4263 | while (p > first_old | |
4264 | && q > first_new | |
4265 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4266 | { |
27786b2f | 4267 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 JB |
4268 | --run->current_vpos; |
4269 | --run->desired_vpos; | |
5f5c8ee5 GM |
4270 | ++run->nrows; |
4271 | run->height += h; | |
4272 | run->desired_y -= h; | |
4273 | run->current_y -= h; | |
27786b2f | 4274 | --p, --q; |
5f5c8ee5 | 4275 | } |
4588ec20 | 4276 | |
5f5c8ee5 | 4277 | /* Extend forward. */ |
27786b2f PE |
4278 | p = i + 1; |
4279 | q = new_line + 1; | |
4280 | while (p < last_old | |
4281 | && q < last_new | |
4282 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4283 | { |
27786b2f | 4284 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 | 4285 | ++run->nrows; |
5f5c8ee5 | 4286 | run->height += h; |
27786b2f | 4287 | ++p, ++q; |
5f5c8ee5 | 4288 | } |
19dff8dc | 4289 | |
5f5c8ee5 GM |
4290 | /* Insert run into list of all runs. Order runs by copied |
4291 | pixel lines. Note that we record runs that don't have to | |
4292 | be copied because they are already in place. This is done | |
4293 | because we can avoid calling update_window_line in this | |
4294 | case. */ | |
27786b2f | 4295 | for (p = 0; p < nruns && runs[p]->height > run->height; ++p) |
5f5c8ee5 | 4296 | ; |
27786b2f PE |
4297 | for (q = nruns; q > p; --q) |
4298 | runs[q] = runs[q - 1]; | |
4299 | runs[p] = run; | |
5f5c8ee5 GM |
4300 | ++nruns; |
4301 | ||
4302 | i += run->nrows; | |
4303 | } | |
4304 | else | |
4305 | ++i; | |
4588ec20 | 4306 | |
5f5c8ee5 GM |
4307 | /* Do the moves. Do it in a way that we don't overwrite something |
4308 | we want to copy later on. This is not solvable in general | |
4309 | because there is only one display and we don't have a way to | |
4310 | exchange areas on this display. Example: | |
4588ec20 | 4311 | |
5f5c8ee5 GM |
4312 | +-----------+ +-----------+ |
4313 | | A | | B | | |
4314 | +-----------+ --> +-----------+ | |
4315 | | B | | A | | |
4316 | +-----------+ +-----------+ | |
4588ec20 | 4317 | |
5f5c8ee5 GM |
4318 | Instead, prefer bigger moves, and invalidate moves that would |
4319 | copy from where we copied to. */ | |
ea0d86af | 4320 | |
5f5c8ee5 GM |
4321 | for (i = 0; i < nruns; ++i) |
4322 | if (runs[i]->nrows > 0) | |
4323 | { | |
4324 | struct run *r = runs[i]; | |
24e86043 | 4325 | |
5f5c8ee5 GM |
4326 | /* Copy on the display. */ |
4327 | if (r->current_y != r->desired_y) | |
4328 | { | |
989b42d2 | 4329 | rif->clear_window_mouse_face (w); |
5f5c8ee5 | 4330 | rif->scroll_run_hook (w, r); |
1305621b | 4331 | } |
5f5c8ee5 | 4332 | |
1305621b YM |
4333 | /* Truncate runs that copy to where we copied to, and |
4334 | invalidate runs that copy from where we copied to. */ | |
4335 | for (j = nruns - 1; j > i; --j) | |
4336 | { | |
4337 | struct run *p = runs[j]; | |
59ea14cd | 4338 | bool truncated_p = 0; |
5f5c8ee5 | 4339 | |
1305621b YM |
4340 | if (p->nrows > 0 |
4341 | && p->desired_y < r->desired_y + r->height | |
4342 | && p->desired_y + p->height > r->desired_y) | |
5f5c8ee5 | 4343 | { |
1305621b YM |
4344 | if (p->desired_y < r->desired_y) |
4345 | { | |
4346 | p->nrows = r->desired_vpos - p->desired_vpos; | |
4347 | p->height = r->desired_y - p->desired_y; | |
4348 | truncated_p = 1; | |
4349 | } | |
4350 | else | |
4351 | { | |
4352 | int nrows_copied = (r->desired_vpos + r->nrows | |
4353 | - p->desired_vpos); | |
4354 | ||
4355 | if (p->nrows <= nrows_copied) | |
4356 | p->nrows = 0; | |
4357 | else | |
4358 | { | |
4359 | int height_copied = (r->desired_y + r->height | |
4360 | - p->desired_y); | |
4361 | ||
4362 | p->current_vpos += nrows_copied; | |
4363 | p->desired_vpos += nrows_copied; | |
4364 | p->nrows -= nrows_copied; | |
4365 | p->current_y += height_copied; | |
4366 | p->desired_y += height_copied; | |
4367 | p->height -= height_copied; | |
4368 | truncated_p = 1; | |
4369 | } | |
4370 | } | |
4371 | } | |
177c0ea7 | 4372 | |
1305621b YM |
4373 | if (r->current_y != r->desired_y |
4374 | /* The condition below is equivalent to | |
4375 | ((p->current_y >= r->desired_y | |
5f5c8ee5 | 4376 | && p->current_y < r->desired_y + r->height) |
1305621b | 4377 | || (p->current_y + p->height > r->desired_y |
5f5c8ee5 | 4378 | && (p->current_y + p->height |
1305621b YM |
4379 | <= r->desired_y + r->height))) |
4380 | because we have 0 < p->height <= r->height. */ | |
4381 | && p->current_y < r->desired_y + r->height | |
4382 | && p->current_y + p->height > r->desired_y) | |
4383 | p->nrows = 0; | |
4384 | ||
4385 | /* Reorder runs by copied pixel lines if truncated. */ | |
4386 | if (truncated_p && p->nrows > 0) | |
4387 | { | |
4388 | int k = nruns - 1; | |
4389 | ||
4390 | while (runs[k]->nrows == 0 || runs[k]->height < p->height) | |
4391 | k--; | |
4392 | memmove (runs + j, runs + j + 1, (k - j) * sizeof (*runs)); | |
4393 | runs[k] = p; | |
5f5c8ee5 GM |
4394 | } |
4395 | } | |
ea0d86af | 4396 | |
5f5c8ee5 GM |
4397 | /* Assign matrix rows. */ |
4398 | for (j = 0; j < r->nrows; ++j) | |
4399 | { | |
4400 | struct glyph_row *from, *to; | |
59ea14cd | 4401 | bool to_overlapped_p; |
e876ff42 | 4402 | |
5f5c8ee5 GM |
4403 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
4404 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 4405 | to_overlapped_p = to->overlapped_p; |
e61124cd | 4406 | from->redraw_fringe_bitmaps_p = from->fringe_bitmap_periodic_p; |
5f5c8ee5 | 4407 | assign_row (to, from); |
1305621b YM |
4408 | /* The above `assign_row' actually does swap, so if we had |
4409 | an overlap in the copy destination of two runs, then | |
4410 | the second run would assign a previously disabled bogus | |
4411 | row. But thanks to the truncation code in the | |
4412 | preceding for-loop, we no longer have such an overlap, | |
4413 | and thus the assigned row should always be enabled. */ | |
a54e2c05 | 4414 | eassert (to->enabled_p); |
1305621b | 4415 | from->enabled_p = 0; |
408f5064 | 4416 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
4417 | } |
4418 | } | |
15874c59 | 4419 | |
6df5d75f GM |
4420 | /* Clear the hash table, for the next time. */ |
4421 | for (i = 0; i < row_entry_idx; ++i) | |
4422 | row_table[row_entry_pool[i].bucket] = NULL; | |
4423 | ||
aec1708a | 4424 | /* Value is 1 to indicate that we scrolled the display. */ |
908589fd | 4425 | return nruns > 0; |
5f5c8ee5 | 4426 | } |
de83c314 | 4427 | |
15874c59 | 4428 | |
4588ec20 | 4429 | \f |
5f5c8ee5 GM |
4430 | /************************************************************************ |
4431 | Frame-Based Updates | |
4432 | ************************************************************************/ | |
4588ec20 | 4433 | |
5f5c8ee5 | 4434 | /* Update the desired frame matrix of frame F. |
4588ec20 | 4435 | |
59ea14cd PE |
4436 | FORCE_P means that the update should not be stopped by pending input. |
4437 | INHIBIT_HAIRY_ID_P means that scrolling should not be tried. | |
5f5c8ee5 | 4438 | |
59ea14cd | 4439 | Value is true if update was stopped due to pending input. */ |
5f5c8ee5 | 4440 | |
59ea14cd PE |
4441 | static bool |
4442 | update_frame_1 (struct frame *f, bool force_p, bool inhibit_id_p) | |
4588ec20 | 4443 | { |
5f5c8ee5 GM |
4444 | /* Frame matrices to work on. */ |
4445 | struct glyph_matrix *current_matrix = f->current_matrix; | |
4446 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
4447 | int i; | |
59ea14cd | 4448 | bool pause_p; |
4588ec20 | 4449 | int preempt_count = baud_rate / 2400 + 1; |
5f5c8ee5 | 4450 | |
a54e2c05 | 4451 | eassert (current_matrix && desired_matrix); |
4588ec20 | 4452 | |
c37e4889 RS |
4453 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
4454 | calculate_costs (f); | |
4455 | ||
d88c2b9e RS |
4456 | if (preempt_count <= 0) |
4457 | preempt_count = 1; | |
4458 | ||
a2130dbb | 4459 | if (!force_p && detect_input_pending_ignore_squeezables ()) |
4588ec20 | 4460 | { |
27786b2f | 4461 | pause_p = 1; |
4588ec20 JB |
4462 | goto do_pause; |
4463 | } | |
4464 | ||
5f5c8ee5 | 4465 | /* If we cannot insert/delete lines, it's no use trying it. */ |
daf01701 | 4466 | if (!FRAME_LINE_INS_DEL_OK (f)) |
5f5c8ee5 | 4467 | inhibit_id_p = 1; |
7098a0fa | 4468 | |
efb859b4 | 4469 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
4470 | i/d line if just want cursor motion. */ |
4471 | for (i = 0; i < desired_matrix->nrows; i++) | |
4472 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
4473 | break; |
4474 | ||
4475 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
4476 | if (!inhibit_id_p && i < desired_matrix->nrows) |
4477 | force_p |= scrolling (f); | |
4588ec20 JB |
4478 | |
4479 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
4480 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
4481 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 4482 | |
5f5c8ee5 GM |
4483 | /* Now update the rest of the lines. */ |
4484 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 4485 | { |
5f5c8ee5 | 4486 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 4487 | { |
b6a65ac2 | 4488 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
4489 | { |
4490 | /* Flush out every so many lines. | |
4491 | Also flush out if likely to have more than 1k buffered | |
4492 | otherwise. I'm told that some telnet connections get | |
4493 | really screwed by more than 1k output at once. */ | |
fced92f1 CY |
4494 | FILE *display_output = FRAME_TTY (f)->output; |
4495 | if (display_output) | |
4588ec20 | 4496 | { |
8148369c | 4497 | ptrdiff_t outq = __fpending (display_output); |
fced92f1 CY |
4498 | if (outq > 900 |
4499 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
06b63c9b | 4500 | fflush (display_output); |
4588ec20 | 4501 | } |
4588ec20 JB |
4502 | } |
4503 | ||
d012c62b | 4504 | if (!force_p && (i - 1) % preempt_count == 0) |
a2d5fca0 | 4505 | detect_input_pending_ignore_squeezables (); |
a2960116 | 4506 | |
5f5c8ee5 | 4507 | update_frame_line (f, i); |
4588ec20 | 4508 | } |
4588ec20 | 4509 | } |
177c0ea7 | 4510 | |
7216e43b | 4511 | lint_assume (0 <= FRAME_LINES (f)); |
59ea14cd | 4512 | pause_p = 0 < i && i < FRAME_LINES (f) - 1; |
4588ec20 JB |
4513 | |
4514 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
27786b2f | 4515 | if (!pause_p) |
4588ec20 | 4516 | { |
48cf7030 | 4517 | if ((cursor_in_echo_area |
5f5c8ee5 | 4518 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 4519 | show the cursor for the message instead of for the |
5f5c8ee5 | 4520 | (now hidden) mini-buffer contents. */ |
2577053b RS |
4521 | || (EQ (minibuf_window, selected_window) |
4522 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 4523 | && !NILP (echo_area_buffer[0]))) |
2577053b | 4524 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 4525 | the active mini-buffer window. */ |
2577053b | 4526 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 4527 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 4528 | { |
7df02016 | 4529 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
4530 | int row, col; |
4531 | ||
4532 | if (cursor_in_echo_area < 0) | |
4533 | { | |
5f5c8ee5 GM |
4534 | /* Negative value of cursor_in_echo_area means put |
4535 | cursor at beginning of line. */ | |
648fa17d JB |
4536 | row = top; |
4537 | col = 0; | |
4538 | } | |
1113d9db | 4539 | else |
648fa17d | 4540 | { |
5f5c8ee5 GM |
4541 | /* Positive value of cursor_in_echo_area means put |
4542 | cursor at the end of the prompt. If the mini-buffer | |
4543 | is several lines high, find the last line that has | |
4544 | any text on it. */ | |
7df02016 | 4545 | row = FRAME_LINES (f); |
177c0ea7 | 4546 | do |
648fa17d | 4547 | { |
5f5c8ee5 GM |
4548 | --row; |
4549 | col = 0; | |
177c0ea7 | 4550 | |
5f5c8ee5 GM |
4551 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
4552 | { | |
4553 | /* Frame rows are filled up with spaces that | |
4554 | must be ignored here. */ | |
5f5c8ee5 GM |
4555 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
4556 | row); | |
4557 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
4558 | struct glyph *last = start + r->used[TEXT_AREA]; | |
4559 | ||
4560 | while (last > start | |
4561 | && (last - 1)->charpos < 0) | |
4562 | --last; | |
177c0ea7 | 4563 | |
5f5c8ee5 GM |
4564 | col = last - start; |
4565 | } | |
648fa17d JB |
4566 | } |
4567 | while (row > top && col == 0); | |
4568 | ||
6395da5c | 4569 | /* Make sure COL is not out of range. */ |
868e640e | 4570 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 4571 | { |
6395da5c | 4572 | /* If we have another row, advance cursor into it. */ |
7df02016 | 4573 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 4574 | { |
7df02016 | 4575 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
4576 | row++; |
4577 | } | |
4578 | /* Otherwise move it back in range. */ | |
4579 | else | |
868e640e | 4580 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
4581 | } |
4582 | } | |
4583 | ||
385ed61f | 4584 | cursor_to (f, row, col); |
1113d9db | 4585 | } |
4588ec20 | 4586 | else |
5f5c8ee5 GM |
4587 | { |
4588 | /* We have only one cursor on terminal frames. Use it to | |
4589 | display the cursor of the selected window. */ | |
4590 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
4591 | if (w->cursor.vpos >= 0 |
4592 | /* The cursor vpos may be temporarily out of bounds | |
4593 | in the following situation: There is one window, | |
4594 | with the cursor in the lower half of it. The window | |
4595 | is split, and a message causes a redisplay before | |
4596 | a new cursor position has been computed. */ | |
7df02016 | 4597 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
4598 | { |
4599 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
4600 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
4601 | ||
d3d50620 DA |
4602 | if (INTEGERP (w->left_margin_cols)) |
4603 | x += XFASTINT (w->left_margin_cols); | |
177c0ea7 | 4604 | |
7df02016 | 4605 | /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */ |
385ed61f | 4606 | cursor_to (f, y, x); |
5f5c8ee5 GM |
4607 | } |
4608 | } | |
4588ec20 JB |
4609 | } |
4610 | ||
4588ec20 JB |
4611 | do_pause: |
4612 | ||
5f5c8ee5 | 4613 | clear_desired_matrices (f); |
27786b2f | 4614 | return pause_p; |
4588ec20 JB |
4615 | } |
4616 | ||
4588ec20 | 4617 | |
5f5c8ee5 | 4618 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 4619 | |
59ea14cd | 4620 | static bool |
971de7fb | 4621 | scrolling (struct frame *frame) |
4588ec20 JB |
4622 | { |
4623 | int unchanged_at_top, unchanged_at_bottom; | |
4624 | int window_size; | |
4625 | int changed_lines; | |
38182d90 PE |
4626 | int *old_hash = alloca (FRAME_LINES (frame) * sizeof (int)); |
4627 | int *new_hash = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4628 | int *draw_cost = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4629 | int *old_draw_cost = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 4630 | register int i; |
7df02016 | 4631 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
4632 | struct glyph_matrix *current_matrix = frame->current_matrix; |
4633 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 4634 | |
5f5c8ee5 | 4635 | if (!current_matrix) |
1088b922 | 4636 | emacs_abort (); |
4588ec20 | 4637 | |
5f5c8ee5 GM |
4638 | /* Compute hash codes of all the lines. Also calculate number of |
4639 | changed lines, number of unchanged lines at the beginning, and | |
4640 | number of unchanged lines at the end. */ | |
4588ec20 JB |
4641 | changed_lines = 0; |
4642 | unchanged_at_top = 0; | |
7df02016 KS |
4643 | unchanged_at_bottom = FRAME_LINES (frame); |
4644 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
4645 | { |
4646 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 4647 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 4648 | return 0; |
5f5c8ee5 GM |
4649 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
4650 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
4651 | { |
4652 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
4653 | new_hash[i] = old_hash[i]; | |
4654 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
4655 | draw_cost[i] = INFINITY; | |
4656 | } | |
4588ec20 | 4657 | else |
f188b3c4 | 4658 | { |
5f5c8ee5 GM |
4659 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
4660 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 4661 | } |
4588ec20 JB |
4662 | |
4663 | if (old_hash[i] != new_hash[i]) | |
4664 | { | |
4665 | changed_lines++; | |
7df02016 | 4666 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
4667 | } |
4668 | else if (i == unchanged_at_top) | |
4669 | unchanged_at_top++; | |
5f5c8ee5 | 4670 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
4671 | } |
4672 | ||
4673 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
daf01701 | 4674 | if ((!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4675 | && changed_lines < baud_rate / 2400) |
7df02016 | 4676 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
4677 | return 1; |
4678 | ||
7df02016 | 4679 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
4680 | - unchanged_at_bottom); |
4681 | ||
daf01701 | 4682 | if (FRAME_SCROLL_REGION_OK (frame)) |
4588ec20 | 4683 | free_at_end_vpos -= unchanged_at_bottom; |
daf01701 | 4684 | else if (FRAME_MEMORY_BELOW_FRAME (frame)) |
4588ec20 JB |
4685 | free_at_end_vpos = -1; |
4686 | ||
4687 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 4688 | current frame and desired frame, don't bother with i/d calc. */ |
daf01701 | 4689 | if (!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4690 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
4691 | && (window_size >= |
4692 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 4693 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
4694 | old_hash, new_hash, draw_cost))) |
4695 | return 0; | |
4696 | ||
5f5c8ee5 GM |
4697 | if (window_size < 2) |
4698 | return 0; | |
4699 | ||
502b9b64 | 4700 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 4701 | draw_cost + unchanged_at_top - 1, |
190bb91a | 4702 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
4703 | old_hash + unchanged_at_top - 1, |
4704 | new_hash + unchanged_at_top - 1, | |
4705 | free_at_end_vpos - unchanged_at_top); | |
4706 | ||
4707 | return 0; | |
4708 | } | |
4588ec20 | 4709 | |
4588ec20 | 4710 | |
5f5c8ee5 GM |
4711 | /* Count the number of blanks at the start of the vector of glyphs R |
4712 | which is LEN glyphs long. */ | |
4588ec20 | 4713 | |
4588ec20 | 4714 | static int |
971de7fb | 4715 | count_blanks (struct glyph *r, int len) |
4588ec20 | 4716 | { |
5f5c8ee5 | 4717 | int i; |
177c0ea7 | 4718 | |
5f5c8ee5 GM |
4719 | for (i = 0; i < len; ++i) |
4720 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
4721 | break; | |
4722 | ||
4723 | return i; | |
4588ec20 JB |
4724 | } |
4725 | ||
5f5c8ee5 GM |
4726 | |
4727 | /* Count the number of glyphs in common at the start of the glyph | |
4728 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
4729 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
4730 | ||
4588ec20 | 4731 | static int |
971de7fb | 4732 | count_match (struct glyph *str1, struct glyph *end1, struct glyph *str2, struct glyph *end2) |
4588ec20 | 4733 | { |
5f5c8ee5 GM |
4734 | struct glyph *p1 = str1; |
4735 | struct glyph *p2 = str2; | |
177c0ea7 | 4736 | |
5f5c8ee5 GM |
4737 | while (p1 < end1 |
4738 | && p2 < end2 | |
42186983 | 4739 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 4740 | ++p1, ++p2; |
177c0ea7 | 4741 | |
5f5c8ee5 | 4742 | return p1 - str1; |
4588ec20 JB |
4743 | } |
4744 | ||
5f5c8ee5 | 4745 | |
4588ec20 | 4746 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 4747 | |
5e617bc2 | 4748 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS ((f))]) |
4588ec20 | 4749 | |
5f5c8ee5 GM |
4750 | |
4751 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
4752 | ||
4588ec20 | 4753 | static void |
971de7fb | 4754 | update_frame_line (struct frame *f, int vpos) |
4588ec20 | 4755 | { |
5f5c8ee5 | 4756 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
4757 | int tem; |
4758 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
4759 | struct glyph_matrix *current_matrix = f->current_matrix; |
4760 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
4761 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
4762 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
59ea14cd PE |
4763 | bool must_write_whole_line_p; |
4764 | bool write_spaces_p = FRAME_MUST_WRITE_SPACES (f); | |
4765 | bool colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background | |
4766 | != FACE_TTY_DEFAULT_BG_COLOR); | |
0a894bad GM |
4767 | |
4768 | if (colored_spaces_p) | |
4769 | write_spaces_p = 1; | |
5f5c8ee5 | 4770 | |
26c63686 GM |
4771 | /* Current row not enabled means it has unknown contents. We must |
4772 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
4773 | must_write_whole_line_p = !current_row->enabled_p; |
4774 | if (must_write_whole_line_p) | |
4588ec20 | 4775 | { |
5f5c8ee5 | 4776 | obody = 0; |
4588ec20 JB |
4777 | olen = 0; |
4778 | } | |
4779 | else | |
4780 | { | |
5f5c8ee5 GM |
4781 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
4782 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 4783 | |
4cecaab8 MB |
4784 | /* Ignore trailing spaces, if we can. */ |
4785 | if (!write_spaces_p) | |
4786 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
4787 | olen--; | |
4588ec20 JB |
4788 | } |
4789 | ||
5f5c8ee5 GM |
4790 | current_row->enabled_p = 1; |
4791 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 4792 | |
5f5c8ee5 GM |
4793 | /* If desired line is empty, just clear the line. */ |
4794 | if (!desired_row->enabled_p) | |
4588ec20 JB |
4795 | { |
4796 | nlen = 0; | |
4797 | goto just_erase; | |
4798 | } | |
4799 | ||
5f5c8ee5 GM |
4800 | nbody = desired_row->glyphs[TEXT_AREA]; |
4801 | nlen = desired_row->used[TEXT_AREA]; | |
4802 | nend = nbody + nlen; | |
4803 | ||
4804 | /* If display line has unknown contents, write the whole line. */ | |
4805 | if (must_write_whole_line_p) | |
4806 | { | |
26c63686 | 4807 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 4808 | if (!write_spaces_p) |
74ca462f GM |
4809 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
4810 | --nlen; | |
4811 | ||
26c63686 | 4812 | /* Write the contents of the desired line. */ |
74ca462f | 4813 | if (nlen) |
26c63686 | 4814 | { |
385ed61f KL |
4815 | cursor_to (f, vpos, 0); |
4816 | write_glyphs (f, nbody, nlen); | |
26c63686 | 4817 | } |
177c0ea7 | 4818 | |
26c63686 GM |
4819 | /* Don't call clear_end_of_line if we already wrote the whole |
4820 | line. The cursor will not be at the right margin in that | |
4821 | case but in the line below. */ | |
7df02016 | 4822 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 | 4823 | { |
385ed61f KL |
4824 | cursor_to (f, vpos, nlen); |
4825 | clear_end_of_line (f, FRAME_TOTAL_COLS (f)); | |
26c63686 | 4826 | } |
58827478 GM |
4827 | else |
4828 | /* Make sure we are in the right row, otherwise cursor movement | |
4829 | with cmgoto might use `ch' in the wrong row. */ | |
385ed61f | 4830 | cursor_to (f, vpos, 0); |
177c0ea7 | 4831 | |
5f5c8ee5 GM |
4832 | make_current (desired_matrix, current_matrix, vpos); |
4833 | return; | |
4834 | } | |
4588ec20 JB |
4835 | |
4836 | /* Pretend trailing spaces are not there at all, | |
4837 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
4838 | if (!write_spaces_p) |
4839 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
4840 | nlen--; | |
4588ec20 JB |
4841 | |
4842 | /* If there's no i/d char, quickly do the best we can without it. */ | |
daf01701 | 4843 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
4588ec20 | 4844 | { |
5f5c8ee5 | 4845 | int i, j; |
4588ec20 | 4846 | |
5f5c8ee5 GM |
4847 | /* Find the first glyph in desired row that doesn't agree with |
4848 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
4849 | for (i = 0; i < nlen; i++) |
4850 | { | |
5f5c8ee5 | 4851 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 4852 | { |
5f5c8ee5 GM |
4853 | /* Find the end of the run of different glyphs. */ |
4854 | j = i + 1; | |
4855 | while (j < nlen | |
4856 | && (j >= olen | |
4857 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
4858 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
4859 | ++j; | |
177c0ea7 JB |
4860 | |
4861 | /* Output this run of non-matching chars. */ | |
385ed61f KL |
4862 | cursor_to (f, vpos, i); |
4863 | write_glyphs (f, nbody + i, j - i); | |
5f5c8ee5 | 4864 | i = j - 1; |
4588ec20 JB |
4865 | |
4866 | /* Now find the next non-match. */ | |
4867 | } | |
4868 | } | |
4869 | ||
4870 | /* Clear the rest of the line, or the non-clear part of it. */ | |
4871 | if (olen > nlen) | |
4872 | { | |
385ed61f KL |
4873 | cursor_to (f, vpos, nlen); |
4874 | clear_end_of_line (f, olen); | |
4588ec20 JB |
4875 | } |
4876 | ||
5f5c8ee5 GM |
4877 | /* Make current row = desired row. */ |
4878 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
4879 | return; |
4880 | } | |
4881 | ||
5f5c8ee5 GM |
4882 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
4883 | characters in a row. */ | |
4884 | ||
4588ec20 JB |
4885 | if (!olen) |
4886 | { | |
5f5c8ee5 GM |
4887 | /* If current line is blank, skip over initial spaces, if |
4888 | possible, and write the rest. */ | |
4cecaab8 | 4889 | if (write_spaces_p) |
5f5c8ee5 GM |
4890 | nsp = 0; |
4891 | else | |
4892 | nsp = count_blanks (nbody, nlen); | |
4893 | ||
4588ec20 JB |
4894 | if (nlen > nsp) |
4895 | { | |
385ed61f KL |
4896 | cursor_to (f, vpos, nsp); |
4897 | write_glyphs (f, nbody + nsp, nlen - nsp); | |
4588ec20 JB |
4898 | } |
4899 | ||
502b9b64 | 4900 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 4901 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
4902 | return; |
4903 | } | |
4904 | ||
4588ec20 | 4905 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 4906 | osp = count_blanks (obody, olen); |
4cecaab8 | 4907 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 4908 | |
5f5c8ee5 GM |
4909 | /* Compute number of matching chars starting with first non-blank. */ |
4910 | begmatch = count_match (obody + osp, obody + olen, | |
4911 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
4912 | |
4913 | /* Spaces in new match implicit space past the end of old. */ | |
4914 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 4915 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
4916 | { |
4917 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
4918 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
4919 | ++begmatch; | |
4588ec20 JB |
4920 | } |
4921 | ||
4922 | /* Avoid doing insert/delete char | |
4923 | just cause number of leading spaces differs | |
5f5c8ee5 | 4924 | when the following text does not match. */ |
4588ec20 JB |
4925 | if (begmatch == 0 && osp != nsp) |
4926 | osp = nsp = min (osp, nsp); | |
4927 | ||
4928 | /* Find matching characters at end of line */ | |
4929 | op1 = obody + olen; | |
4930 | np1 = nbody + nlen; | |
4931 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
4932 | while (op1 > op2 |
4933 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
4934 | { |
4935 | op1--; | |
4936 | np1--; | |
4937 | } | |
4938 | endmatch = obody + olen - op1; | |
4939 | ||
4588ec20 JB |
4940 | /* tem gets the distance to insert or delete. |
4941 | endmatch is how many characters we save by doing so. | |
4942 | Is it worth it? */ | |
4943 | ||
4944 | tem = (nlen - nsp) - (olen - osp); | |
4945 | if (endmatch && tem | |
daf01701 | 4946 | && (!FRAME_CHAR_INS_DEL_OK (f) |
8a56675d | 4947 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
4948 | endmatch = 0; |
4949 | ||
4950 | /* nsp - osp is the distance to insert or delete. | |
4951 | If that is nonzero, begmatch is known to be nonzero also. | |
4952 | begmatch + endmatch is how much we save by doing the ins/del. | |
4953 | Is it worth it? */ | |
4954 | ||
4955 | if (nsp != osp | |
daf01701 | 4956 | && (!FRAME_CHAR_INS_DEL_OK (f) |
c363a1d6 | 4957 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
4958 | { |
4959 | begmatch = 0; | |
4960 | endmatch = 0; | |
4961 | osp = nsp = min (osp, nsp); | |
4962 | } | |
4963 | ||
4964 | /* Now go through the line, inserting, writing and | |
4965 | deleting as appropriate. */ | |
4966 | ||
4967 | if (osp > nsp) | |
4968 | { | |
385ed61f KL |
4969 | cursor_to (f, vpos, nsp); |
4970 | delete_glyphs (f, osp - nsp); | |
4588ec20 JB |
4971 | } |
4972 | else if (nsp > osp) | |
4973 | { | |
4974 | /* If going to delete chars later in line | |
4975 | and insert earlier in the line, | |
4976 | must delete first to avoid losing data in the insert */ | |
4977 | if (endmatch && nlen < olen + nsp - osp) | |
4978 | { | |
385ed61f KL |
4979 | cursor_to (f, vpos, nlen - endmatch + osp - nsp); |
4980 | delete_glyphs (f, olen + nsp - osp - nlen); | |
4588ec20 JB |
4981 | olen = nlen - (nsp - osp); |
4982 | } | |
385ed61f KL |
4983 | cursor_to (f, vpos, osp); |
4984 | insert_glyphs (f, 0, nsp - osp); | |
4588ec20 JB |
4985 | } |
4986 | olen += nsp - osp; | |
4987 | ||
4988 | tem = nsp + begmatch + endmatch; | |
4989 | if (nlen != tem || olen != tem) | |
4990 | { | |
4588ec20 JB |
4991 | if (!endmatch || nlen == olen) |
4992 | { | |
c363a1d6 GM |
4993 | /* If new text being written reaches right margin, there is |
4994 | no need to do clear-to-eol at the end of this function | |
4995 | (and it would not be safe, since cursor is not going to | |
4996 | be "at the margin" after the text is done). */ | |
7df02016 | 4997 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 4998 | olen = 0; |
c363a1d6 GM |
4999 | |
5000 | /* Function write_glyphs is prepared to do nothing | |
5001 | if passed a length <= 0. Check it here to avoid | |
5002 | unnecessary cursor movement. */ | |
5003 | if (nlen - tem > 0) | |
5004 | { | |
385ed61f KL |
5005 | cursor_to (f, vpos, nsp + begmatch); |
5006 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
c363a1d6 | 5007 | } |
4588ec20 JB |
5008 | } |
5009 | else if (nlen > olen) | |
5010 | { | |
24e86043 KH |
5011 | /* Here, we used to have the following simple code: |
5012 | ---------------------------------------- | |
5013 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
5014 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
5015 | ---------------------------------------- | |
5016 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
5017 | is a padding glyph. */ | |
5018 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
5019 | int del; | |
5f5c8ee5 | 5020 | |
385ed61f | 5021 | cursor_to (f, vpos, nsp + begmatch); |
177c0ea7 | 5022 | |
5f5c8ee5 | 5023 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
5024 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
5025 | out--; | |
385ed61f | 5026 | write_glyphs (f, nbody + nsp + begmatch, out); |
177c0ea7 | 5027 | |
5f5c8ee5 GM |
5028 | /* If we left columns to be overwritten, we must delete them. */ |
5029 | del = olen - tem - out; | |
c363a1d6 | 5030 | if (del > 0) |
385ed61f | 5031 | delete_glyphs (f, del); |
177c0ea7 | 5032 | |
5f5c8ee5 | 5033 | /* At last, we insert columns not yet written out. */ |
385ed61f | 5034 | insert_glyphs (f, nbody + nsp + begmatch + out, nlen - olen + del); |
5f5c8ee5 GM |
5035 | olen = nlen; |
5036 | } | |
5037 | else if (olen > nlen) | |
5038 | { | |
385ed61f KL |
5039 | cursor_to (f, vpos, nsp + begmatch); |
5040 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
5041 | delete_glyphs (f, olen - nlen); | |
5f5c8ee5 GM |
5042 | olen = nlen; |
5043 | } | |
bd9e3e75 | 5044 | } |
5f5c8ee5 GM |
5045 | |
5046 | just_erase: | |
5047 | /* If any unerased characters remain after the new line, erase them. */ | |
5048 | if (olen > nlen) | |
078b3696 | 5049 | { |
385ed61f KL |
5050 | cursor_to (f, vpos, nlen); |
5051 | clear_end_of_line (f, olen); | |
078b3696 | 5052 | } |
5f5c8ee5 GM |
5053 | |
5054 | /* Exchange contents between current_frame and new_frame. */ | |
5055 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5056 | } |
5f5c8ee5 GM |
5057 | |
5058 | ||
078b3696 | 5059 | \f |
5f5c8ee5 GM |
5060 | /*********************************************************************** |
5061 | X/Y Position -> Buffer Position | |
5062 | ***********************************************************************/ | |
5063 | ||
a1b0a6db | 5064 | /* Determine what's under window-relative pixel position (*X, *Y). |
2396cbba | 5065 | Return the OBJECT (string or buffer) that's there. |
6b61353c | 5066 | Return in *POS the position in that object. |
2396cbba EZ |
5067 | Adjust *X and *Y to character positions. |
5068 | Return in *DX and *DY the pixel coordinates of the click, | |
5069 | relative to the top left corner of OBJECT, or relative to | |
5070 | the top left corner of the character glyph at (*X, *Y) | |
5071 | if OBJECT is nil. | |
5072 | Return WIDTH and HEIGHT of the object at (*X, *Y), or zero | |
5073 | if the coordinates point to an empty area of the display. */ | |
5f5c8ee5 | 5074 | |
6b61353c | 5075 | Lisp_Object |
971de7fb | 5076 | 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 | 5077 | { |
5f5c8ee5 | 5078 | struct it it; |
707ea971 | 5079 | Lisp_Object old_current_buffer = Fcurrent_buffer (); |
5f5c8ee5 | 5080 | struct text_pos startp; |
6b61353c KH |
5081 | Lisp_Object string; |
5082 | struct glyph_row *row; | |
cedd7cd9 KS |
5083 | #ifdef HAVE_WINDOW_SYSTEM |
5084 | struct image *img = 0; | |
5085 | #endif | |
2396cbba | 5086 | int x0, x1, to_x; |
57b3e30b | 5087 | void *itdata = NULL; |
5f5c8ee5 | 5088 | |
707ea971 CY |
5089 | /* We used to set current_buffer directly here, but that does the |
5090 | wrong thing with `face-remapping-alist' (bug#2044). */ | |
e74aeda8 | 5091 | Fset_buffer (w->contents); |
57b3e30b | 5092 | itdata = bidi_shelve_cache (); |
d3d50620 | 5093 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
5f5c8ee5 GM |
5094 | CHARPOS (startp) = min (ZV, max (BEGV, CHARPOS (startp))); |
5095 | BYTEPOS (startp) = min (ZV_BYTE, max (BEGV_BYTE, BYTEPOS (startp))); | |
5096 | start_display (&it, w, startp); | |
352ec8ff EZ |
5097 | /* start_display takes into account the header-line row, but IT's |
5098 | vpos still counts from the glyph row that includes the window's | |
5099 | start position. Adjust for a possible header-line row. */ | |
59ea14cd | 5100 | it.vpos += WINDOW_WANTS_HEADER_LINE_P (w); |
177c0ea7 | 5101 | |
9173a8fb | 5102 | x0 = *x; |
2396cbba EZ |
5103 | |
5104 | /* First, move to the beginning of the row corresponding to *Y. We | |
5105 | need to be in that row to get the correct value of base paragraph | |
40629f17 | 5106 | direction for the text at (*X, *Y). */ |
2396cbba EZ |
5107 | move_it_to (&it, -1, 0, *y, -1, MOVE_TO_X | MOVE_TO_Y); |
5108 | ||
5109 | /* TO_X is the pixel position that the iterator will compute for the | |
40629f17 EZ |
5110 | glyph at *X. We add it.first_visible_x because iterator |
5111 | positions include the hscroll. */ | |
2396cbba EZ |
5112 | to_x = x0 + it.first_visible_x; |
5113 | if (it.bidi_it.paragraph_dir == R2L) | |
5114 | /* For lines in an R2L paragraph, we need to mirror TO_X wrt the | |
5115 | text area. This is because the iterator, even in R2L | |
5116 | paragraphs, delivers glyphs as if they started at the left | |
5117 | margin of the window. (When we actually produce glyphs for | |
5118 | display, we reverse their order in PRODUCE_GLYPHS, but the | |
5119 | iterator doesn't know about that.) The following line adjusts | |
5120 | the pixel position to the iterator geometry, which is what | |
40629f17 EZ |
5121 | move_it_* routines use. (The -1 is because in a window whose |
5122 | text-area width is W, the rightmost pixel position is W-1, and | |
5123 | it should be mirrored into zero pixel position.) */ | |
5124 | to_x = window_box_width (w, TEXT_AREA) - to_x - 1; | |
5125 | ||
5126 | /* Now move horizontally in the row to the glyph under *X. Second | |
5127 | argument is ZV to prevent move_it_in_display_line from matching | |
5128 | based on buffer positions. */ | |
2396cbba | 5129 | move_it_in_display_line (&it, ZV, to_x, MOVE_TO_X); |
35928349 | 5130 | bidi_unshelve_cache (itdata, 0); |
177c0ea7 | 5131 | |
707ea971 | 5132 | Fset_buffer (old_current_buffer); |
a1b0a6db | 5133 | |
6b61353c KH |
5134 | *dx = x0 + it.first_visible_x - it.current_x; |
5135 | *dy = *y - it.current_y; | |
5136 | ||
e74aeda8 | 5137 | string = w->contents; |
6b61353c KH |
5138 | if (STRINGP (it.string)) |
5139 | string = it.string; | |
a1b0a6db | 5140 | *pos = it.current; |
86282aab KH |
5141 | if (it.what == IT_COMPOSITION |
5142 | && it.cmp_it.nchars > 1 | |
5143 | && it.cmp_it.reversed_p) | |
5144 | { | |
5145 | /* The current display element is a grapheme cluster in a | |
5146 | composition. In that case, we need the position of the first | |
5147 | character of the cluster. But, as it.cmp_it.reversed_p is 1, | |
5148 | it.current points to the last character of the cluster, thus | |
5149 | we must move back to the first character of the same | |
5150 | cluster. */ | |
5151 | CHARPOS (pos->pos) -= it.cmp_it.nchars - 1; | |
5152 | if (STRINGP (it.string)) | |
5153 | BYTEPOS (pos->pos) = string_char_to_byte (string, CHARPOS (pos->pos)); | |
5154 | else | |
e74aeda8 | 5155 | BYTEPOS (pos->pos) = buf_charpos_to_bytepos (XBUFFER (w->contents), |
425cc014 | 5156 | CHARPOS (pos->pos)); |
86282aab | 5157 | } |
6b61353c KH |
5158 | |
5159 | #ifdef HAVE_WINDOW_SYSTEM | |
5160 | if (it.what == IT_IMAGE) | |
5161 | { | |
6b61353c KH |
5162 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5163 | && !NILP (img->spec)) | |
5164 | *object = img->spec; | |
5165 | } | |
5166 | #endif | |
5167 | ||
b70d98e1 KS |
5168 | if (it.vpos < w->current_matrix->nrows |
5169 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5170 | row->enabled_p)) | |
6b61353c KH |
5171 | { |
5172 | if (it.hpos < row->used[TEXT_AREA]) | |
5173 | { | |
5174 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6b61353c | 5175 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5176 | if (img) |
5177 | { | |
5178 | *dy -= row->ascent - glyph->ascent; | |
4be9765d KH |
5179 | *dx += glyph->slice.img.x; |
5180 | *dy += glyph->slice.img.y; | |
cedd7cd9 KS |
5181 | /* Image slices positions are still relative to the entire image */ |
5182 | *width = img->width; | |
5183 | *height = img->height; | |
5184 | } | |
5185 | else | |
6b61353c | 5186 | #endif |
cedd7cd9 KS |
5187 | { |
5188 | *width = glyph->pixel_width; | |
5189 | *height = glyph->ascent + glyph->descent; | |
5190 | } | |
6b61353c KH |
5191 | } |
5192 | else | |
5193 | { | |
5194 | *width = 0; | |
5195 | *height = row->height; | |
5196 | } | |
5197 | } | |
5198 | else | |
5199 | { | |
5200 | *width = *height = 0; | |
5201 | } | |
5202 | ||
5203 | /* Add extra (default width) columns if clicked after EOL. */ | |
5e617bc2 | 5204 | x1 = max (0, it.current_x + it.pixel_width - it.first_visible_x); |
6b61353c KH |
5205 | if (x0 > x1) |
5206 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5207 | ||
5208 | *x = it.hpos; | |
5209 | *y = it.vpos; | |
5210 | ||
5211 | return string; | |
5f5c8ee5 | 5212 | } |
4588ec20 | 5213 | |
5f5c8ee5 GM |
5214 | |
5215 | /* Value is the string under window-relative coordinates X/Y in the | |
6b61353c KH |
5216 | mode line or header line (PART says which) of window W, or nil if none. |
5217 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
5218 | |
5219 | Lisp_Object | |
ace1712c | 5220 | mode_line_string (struct window *w, enum window_part part, |
d311d28c | 5221 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5222 | int *dx, int *dy, int *width, int *height) |
5f5c8ee5 GM |
5223 | { |
5224 | struct glyph_row *row; | |
5225 | struct glyph *glyph, *end; | |
6b61353c | 5226 | int x0, y0; |
5f5c8ee5 GM |
5227 | Lisp_Object string = Qnil; |
5228 | ||
641bdbf3 | 5229 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
5230 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
5231 | else | |
045dee35 | 5232 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
6b61353c KH |
5233 | y0 = *y - row->y; |
5234 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
5f5c8ee5 GM |
5235 | |
5236 | if (row->mode_line_p && row->enabled_p) | |
4588ec20 | 5237 | { |
5f5c8ee5 GM |
5238 | /* Find the glyph under X. If we find one with a string object, |
5239 | it's the one we were looking for. */ | |
5240 | glyph = row->glyphs[TEXT_AREA]; | |
5241 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 5242 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5243 | x0 -= glyph->pixel_width; |
5244 | *x = glyph - row->glyphs[TEXT_AREA]; | |
5245 | if (glyph < end) | |
5246 | { | |
5247 | string = glyph->object; | |
5248 | *charpos = glyph->charpos; | |
5249 | *width = glyph->pixel_width; | |
5250 | *height = glyph->ascent + glyph->descent; | |
5251 | #ifdef HAVE_WINDOW_SYSTEM | |
5252 | if (glyph->type == IMAGE_GLYPH) | |
5253 | { | |
5254 | struct image *img; | |
5255 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5256 | if (img != NULL) | |
5257 | *object = img->spec; | |
5258 | y0 -= row->ascent - glyph->ascent; | |
5259 | } | |
5260 | #endif | |
5261 | } | |
5262 | else | |
5263 | { | |
5264 | /* Add extra (default width) columns if clicked after EOL. */ | |
5265 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5266 | *width = 0; | |
5267 | *height = row->height; | |
5268 | } | |
5269 | } | |
5270 | else | |
5271 | { | |
5272 | *x = 0; | |
5273 | x0 = 0; | |
5274 | *width = *height = 0; | |
4588ec20 | 5275 | } |
5f5c8ee5 | 5276 | |
6b61353c KH |
5277 | *dx = x0; |
5278 | *dy = y0; | |
5279 | ||
5f5c8ee5 | 5280 | return string; |
4588ec20 | 5281 | } |
5f5c8ee5 GM |
5282 | |
5283 | ||
db1db309 GM |
5284 | /* Value is the string under window-relative coordinates X/Y in either |
5285 | marginal area, or nil if none. *CHARPOS is set to the position in | |
5286 | the string returned. */ | |
5287 | ||
5288 | Lisp_Object | |
ace1712c | 5289 | marginal_area_string (struct window *w, enum window_part part, |
d311d28c | 5290 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5291 | int *dx, int *dy, int *width, int *height) |
db1db309 GM |
5292 | { |
5293 | struct glyph_row *row = w->current_matrix->rows; | |
5294 | struct glyph *glyph, *end; | |
6b61353c | 5295 | int x0, y0, i, wy = *y; |
641bdbf3 | 5296 | int area; |
db1db309 GM |
5297 | Lisp_Object string = Qnil; |
5298 | ||
641bdbf3 | 5299 | if (part == ON_LEFT_MARGIN) |
db1db309 | 5300 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 5301 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
5302 | area = RIGHT_MARGIN_AREA; |
5303 | else | |
1088b922 | 5304 | emacs_abort (); |
db1db309 GM |
5305 | |
5306 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
5307 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
5308 | break; | |
6b61353c KH |
5309 | y0 = *y - row->y; |
5310 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
db1db309 GM |
5311 | |
5312 | if (row->enabled_p) | |
5313 | { | |
5314 | /* Find the glyph under X. If we find one with a string object, | |
5315 | it's the one we were looking for. */ | |
db1db309 | 5316 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 5317 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5318 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5319 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) |
5320 | + window_box_width (w, LEFT_MARGIN_AREA) | |
5321 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 5322 | else |
7df02016 | 5323 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5324 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5325 | : 0); |
5326 | ||
6b61353c KH |
5327 | glyph = row->glyphs[area]; |
5328 | end = glyph + row->used[area]; | |
cfde341f | 5329 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5330 | x0 -= glyph->pixel_width; |
5331 | *x = glyph - row->glyphs[area]; | |
5332 | if (glyph < end) | |
5333 | { | |
5334 | string = glyph->object; | |
5335 | *charpos = glyph->charpos; | |
5336 | *width = glyph->pixel_width; | |
5337 | *height = glyph->ascent + glyph->descent; | |
5338 | #ifdef HAVE_WINDOW_SYSTEM | |
5339 | if (glyph->type == IMAGE_GLYPH) | |
5340 | { | |
5341 | struct image *img; | |
5342 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5343 | if (img != NULL) | |
5344 | *object = img->spec; | |
5345 | y0 -= row->ascent - glyph->ascent; | |
4be9765d KH |
5346 | x0 += glyph->slice.img.x; |
5347 | y0 += glyph->slice.img.y; | |
6b61353c KH |
5348 | } |
5349 | #endif | |
5350 | } | |
5351 | else | |
5352 | { | |
5353 | /* Add extra (default width) columns if clicked after EOL. */ | |
5354 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5355 | *width = 0; | |
5356 | *height = row->height; | |
5357 | } | |
db1db309 | 5358 | } |
6b61353c KH |
5359 | else |
5360 | { | |
5361 | x0 = 0; | |
5362 | *x = 0; | |
5363 | *width = *height = 0; | |
5364 | } | |
5365 | ||
5366 | *dx = x0; | |
5367 | *dy = y0; | |
db1db309 GM |
5368 | |
5369 | return string; | |
5370 | } | |
5371 | ||
5372 | ||
5f5c8ee5 GM |
5373 | /*********************************************************************** |
5374 | Changing Frame Sizes | |
5375 | ***********************************************************************/ | |
4588ec20 JB |
5376 | |
5377 | #ifdef SIGWINCH | |
5f5c8ee5 | 5378 | |
20ef56db PE |
5379 | static void deliver_window_change_signal (int); |
5380 | ||
9af30bdf | 5381 | static void |
20ef56db | 5382 | handle_window_change_signal (int sig) |
4588ec20 JB |
5383 | { |
5384 | int width, height; | |
28d7d09f | 5385 | struct tty_display_info *tty; |
4d553a13 | 5386 | |
9628b887 KL |
5387 | /* The frame size change obviously applies to a single |
5388 | termcap-controlled terminal, but we can't decide which. | |
5389 | Therefore, we resize the frames corresponding to each tty. | |
9628b887 KL |
5390 | */ |
5391 | for (tty = tty_list; tty; tty = tty->next) { | |
4588ec20 | 5392 | |
0a125897 KL |
5393 | if (! tty->term_initted) |
5394 | continue; | |
4588ec20 | 5395 | |
db878925 DN |
5396 | /* Suspended tty frames have tty->input == NULL avoid trying to |
5397 | use it. */ | |
5398 | if (!tty->input) | |
5399 | continue; | |
5400 | ||
0b0d3e0b | 5401 | get_tty_size (fileno (tty->input), &width, &height); |
3fc809e2 | 5402 | |
bedeffcf | 5403 | if (width > 5 && height > 2) { |
9628b887 | 5404 | Lisp_Object tail, frame; |
3fc809e2 | 5405 | |
9628b887 | 5406 | FOR_EACH_FRAME (tail, frame) |
4d553a13 KL |
5407 | if (FRAME_TERMCAP_P (XFRAME (frame)) && FRAME_TTY (XFRAME (frame)) == tty) |
5408 | /* Record the new sizes, but don't reallocate the data | |
5409 | structures now. Let that be done later outside of the | |
5410 | signal handler. */ | |
5411 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); | |
9628b887 | 5412 | } |
4588ec20 | 5413 | } |
20ef56db | 5414 | } |
3fc809e2 | 5415 | |
20ef56db PE |
5416 | static void |
5417 | deliver_window_change_signal (int sig) | |
5418 | { | |
4d7e6e51 | 5419 | deliver_process_signal (sig, handle_window_change_signal); |
4588ec20 JB |
5420 | } |
5421 | #endif /* SIGWINCH */ | |
5422 | ||
5423 | ||
59ea14cd PE |
5424 | /* Do any change in frame size that was requested by a signal. |
5425 | SAFE means this function is called from a place where it is | |
5426 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 5427 | |
dfcf069d | 5428 | void |
59ea14cd | 5429 | do_pending_window_change (bool safe) |
4588ec20 | 5430 | { |
20ef56db | 5431 | /* If window change signal handler should have run before, run it now. */ |
b96fd3e8 GM |
5432 | if (redisplaying_p && !safe) |
5433 | return; | |
177c0ea7 | 5434 | |
4588ec20 JB |
5435 | while (delayed_size_change) |
5436 | { | |
35f56f96 | 5437 | Lisp_Object tail, frame; |
4588ec20 JB |
5438 | |
5439 | delayed_size_change = 0; | |
5440 | ||
35f56f96 | 5441 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5442 | { |
5f5c8ee5 | 5443 | struct frame *f = XFRAME (frame); |
35f56f96 | 5444 | |
7df02016 KS |
5445 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
5446 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
5447 | 0, 0, safe); | |
4588ec20 JB |
5448 | } |
5449 | } | |
5450 | } | |
5451 | ||
5452 | ||
502b9b64 | 5453 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 5454 | indicate no change is to take place. |
4588ec20 | 5455 | |
59ea14cd PE |
5456 | If DELAY, assume we're being called from a signal handler, and |
5457 | queue the change for later - perhaps the next redisplay. | |
5458 | Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
5459 | from a signal handler. |
5460 | ||
59ea14cd | 5461 | SAFE means this function is called from a place where it's |
b96fd3e8 | 5462 | safe to change frame sizes while a redisplay is in progress. */ |
b6a65ac2 | 5463 | |
dfcf069d | 5464 | void |
59ea14cd PE |
5465 | change_frame_size (struct frame *f, int newheight, int newwidth, |
5466 | bool pretend, bool delay, bool safe) | |
45140e01 RS |
5467 | { |
5468 | Lisp_Object tail, frame; | |
3826ea1a | 5469 | |
9628b887 | 5470 | if (FRAME_MSDOS_P (f)) |
45140e01 | 5471 | { |
9628b887 KL |
5472 | /* On MS-DOS, all frames use the same screen, so a change in |
5473 | size affects all frames. Termcap now supports multiple | |
5474 | ttys. */ | |
45140e01 | 5475 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 5476 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 5477 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 5478 | pretend, delay, safe); |
45140e01 RS |
5479 | } |
5480 | else | |
b96fd3e8 | 5481 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
5482 | } |
5483 | ||
5484 | static void | |
59ea14cd PE |
5485 | change_frame_size_1 (struct frame *f, int newheight, int newwidth, |
5486 | bool pretend, bool delay, bool safe) | |
4588ec20 | 5487 | { |
7df02016 | 5488 | int new_frame_total_cols; |
d311d28c | 5489 | ptrdiff_t count = SPECPDL_INDEX (); |
3826ea1a | 5490 | |
4588ec20 | 5491 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 5492 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 5493 | { |
7df02016 KS |
5494 | f->new_text_lines = newheight; |
5495 | f->new_text_cols = newwidth; | |
4588ec20 JB |
5496 | delayed_size_change = 1; |
5497 | return; | |
5498 | } | |
5499 | ||
502b9b64 | 5500 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
5501 | f->new_text_lines = 0; |
5502 | f->new_text_cols = 0; | |
b6a65ac2 | 5503 | |
08f7aa3e | 5504 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 5505 | if (newheight == 0) |
7df02016 | 5506 | newheight = FRAME_LINES (f); |
ae19c6f2 | 5507 | if (newwidth == 0) |
7df02016 | 5508 | newwidth = FRAME_COLS (f); |
3826ea1a | 5509 | |
3b95a6f9 | 5510 | /* Compute width of windows in F. */ |
b6a65ac2 | 5511 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 5512 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 | 5513 | |
3b95a6f9 MR |
5514 | /* This is the width of the frame with vertical scroll bars and fringe |
5515 | columns. Do this after rounding - see discussion of bug#9723. */ | |
5516 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); | |
5517 | ||
b6a65ac2 | 5518 | /* If we're not changing the frame size, quit now. */ |
3b95a6f9 MR |
5519 | /* Frame width may be unchanged but the text portion may change, for |
5520 | example, fullscreen and remove/add scroll bar. */ | |
7df02016 | 5521 | if (newheight == FRAME_LINES (f) |
3b95a6f9 MR |
5522 | /* Text portion unchanged? */ |
5523 | && newwidth == FRAME_COLS (f) | |
5524 | /* Frame width unchanged? */ | |
5525 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) | |
4588ec20 JB |
5526 | return; |
5527 | ||
4d7e6e51 | 5528 | block_input (); |
cbb95688 | 5529 | |
886a8a6c KH |
5530 | #ifdef MSDOS |
5531 | /* We only can set screen dimensions to certain values supported | |
5532 | by our video hardware. Try to find the smallest size greater | |
5533 | or equal to the requested dimensions. */ | |
5534 | dos_set_window_size (&newheight, &newwidth); | |
5535 | #endif | |
5536 | ||
7df02016 | 5537 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 5538 | { |
562dd5e9 | 5539 | resize_frame_windows (f, newheight, 0); |
b6a65ac2 | 5540 | |
48e482e6 EZ |
5541 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5542 | manipulating video hardware. */ | |
5543 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5544 | FrameRows (FRAME_TTY (f)) = newheight; |
4588ec20 JB |
5545 | } |
5546 | ||
7df02016 | 5547 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 5548 | { |
562dd5e9 | 5549 | resize_frame_windows (f, new_frame_total_cols, 1); |
4588ec20 | 5550 | |
48e482e6 EZ |
5551 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5552 | manipulating video hardware. */ | |
5553 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5554 | FrameCols (FRAME_TTY (f)) = newwidth; |
5f5c8ee5 | 5555 | |
e69b0960 | 5556 | if (WINDOWP (f->tool_bar_window)) |
5f24fa51 | 5557 | XWINDOW (f->tool_bar_window)->total_cols = newwidth; |
4588ec20 JB |
5558 | } |
5559 | ||
7df02016 KS |
5560 | FRAME_LINES (f) = newheight; |
5561 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 5562 | |
5f5c8ee5 GM |
5563 | { |
5564 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
5565 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 5566 | |
5f5c8ee5 GM |
5567 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
5568 | &text_area_height); | |
5569 | if (w->cursor.x >= text_area_x + text_area_width) | |
5570 | w->cursor.hpos = w->cursor.x = 0; | |
5571 | if (w->cursor.y >= text_area_y + text_area_height) | |
5572 | w->cursor.vpos = w->cursor.y = 0; | |
5573 | } | |
986e61b8 | 5574 | |
5f5c8ee5 | 5575 | adjust_glyphs (f); |
5f5c8ee5 | 5576 | calculate_costs (f); |
cb02fa39 GM |
5577 | SET_FRAME_GARBAGED (f); |
5578 | f->resized_p = 1; | |
97cf50e7 | 5579 | |
4d7e6e51 | 5580 | unblock_input (); |
61730a69 | 5581 | |
66322887 | 5582 | record_unwind_current_buffer (); |
e523f7e5 | 5583 | |
ef264c42 | 5584 | run_window_configuration_change_hook (f); |
e523f7e5 RS |
5585 | |
5586 | unbind_to (count, Qnil); | |
4588ec20 | 5587 | } |
5f5c8ee5 GM |
5588 | |
5589 | ||
4588ec20 | 5590 | \f |
5f5c8ee5 GM |
5591 | /*********************************************************************** |
5592 | Terminal Related Lisp Functions | |
5593 | ***********************************************************************/ | |
5594 | ||
5595 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 5596 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
5597 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
5598 | FILE = nil means just close any termscript file currently open. */) | |
5842a27b | 5599 | (Lisp_Object file) |
5f5c8ee5 | 5600 | { |
0b0d3e0b KL |
5601 | struct tty_display_info *tty; |
5602 | ||
7d2f1216 EZ |
5603 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ()) |
5604 | && ! FRAME_MSDOS_P (SELECTED_FRAME ())) | |
0b0d3e0b KL |
5605 | error ("Current frame is not on a tty device"); |
5606 | ||
5607 | tty = CURTTY (); | |
5608 | ||
5609 | if (tty->termscript != 0) | |
406af475 PE |
5610 | { |
5611 | block_input (); | |
5612 | fclose (tty->termscript); | |
5613 | tty->termscript = 0; | |
5614 | unblock_input (); | |
5615 | } | |
5f5c8ee5 GM |
5616 | |
5617 | if (! NILP (file)) | |
5618 | { | |
5619 | file = Fexpand_file_name (file, Qnil); | |
406af475 | 5620 | tty->termscript = emacs_fopen (SSDATA (file), "w"); |
0b0d3e0b | 5621 | if (tty->termscript == 0) |
a9757f6a | 5622 | report_file_error ("Opening termscript", file); |
5f5c8ee5 GM |
5623 | } |
5624 | return Qnil; | |
5625 | } | |
5626 | ||
5627 | ||
4588ec20 | 5628 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
62af879c | 5629 | Ssend_string_to_terminal, 1, 2, 0, |
7ee72033 | 5630 | doc: /* Send STRING to the terminal without alteration. |
62af879c KL |
5631 | Control characters in STRING will have terminal-dependent effects. |
5632 | ||
6ed8eeff | 5633 | Optional parameter TERMINAL specifies the tty terminal device to use. |
558759e4 AM |
5634 | It may be a terminal object, a frame, or nil for the terminal used by |
5635 | the currently selected frame. In batch mode, STRING is sent to stdout | |
5636 | when TERMINAL is nil. */) | |
5842a27b | 5637 | (Lisp_Object string, Lisp_Object terminal) |
4588ec20 | 5638 | { |
7cef7ce3 SM |
5639 | struct terminal *t = get_terminal (terminal, 1); |
5640 | FILE *out; | |
0b0d3e0b | 5641 | |
94f3db62 | 5642 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 5643 | CHECK_STRING (string); |
4d7e6e51 | 5644 | block_input (); |
0b0d3e0b | 5645 | |
6ed8eeff KL |
5646 | if (!t) |
5647 | error ("Unknown terminal device"); | |
0b0d3e0b | 5648 | |
7cef7ce3 SM |
5649 | if (t->type == output_initial) |
5650 | out = stdout; | |
5651 | else if (t->type != output_termcap && t->type != output_msdos_raw) | |
5652 | error ("Device %d is not a termcap terminal device", t->id); | |
5653 | else | |
5654 | { | |
5655 | struct tty_display_info *tty = t->display_info.tty; | |
3fc809e2 | 5656 | |
7cef7ce3 SM |
5657 | if (! tty->output) |
5658 | error ("Terminal is currently suspended"); | |
cecfdea6 | 5659 | |
7cef7ce3 SM |
5660 | if (tty->termscript) |
5661 | { | |
5662 | fwrite (SDATA (string), 1, SBYTES (string), tty->termscript); | |
5663 | fflush (tty->termscript); | |
5664 | } | |
5665 | out = tty->output; | |
4588ec20 | 5666 | } |
7cef7ce3 SM |
5667 | fwrite (SDATA (string), 1, SBYTES (string), out); |
5668 | fflush (out); | |
4d7e6e51 | 5669 | unblock_input (); |
4588ec20 JB |
5670 | return Qnil; |
5671 | } | |
5672 | ||
5f5c8ee5 | 5673 | |
a7ca3326 | 5674 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 5675 | doc: /* Beep, or flash the screen. |
228299fa | 5676 | Also, unless an argument is given, |
7ee72033 | 5677 | terminate any keyboard macro currently executing. */) |
5842a27b | 5678 | (Lisp_Object arg) |
4588ec20 | 5679 | { |
efb859b4 | 5680 | if (!NILP (arg)) |
4588ec20 | 5681 | { |
7fa788da RS |
5682 | if (noninteractive) |
5683 | putchar (07); | |
5684 | else | |
385ed61f | 5685 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5686 | } |
5687 | else | |
5688 | bitch_at_user (); | |
5689 | ||
5690 | return Qnil; | |
5691 | } | |
5692 | ||
dfcf069d | 5693 | void |
971de7fb | 5694 | bitch_at_user (void) |
4588ec20 JB |
5695 | { |
5696 | if (noninteractive) | |
5697 | putchar (07); | |
5f5c8ee5 | 5698 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
81519fd2 SM |
5699 | { |
5700 | const char *msg | |
5701 | = "Keyboard macro terminated by a command ringing the bell"; | |
6c6f1994 | 5702 | Fsignal (Quser_error, list1 (build_string (msg))); |
81519fd2 | 5703 | } |
4588ec20 | 5704 | else |
385ed61f | 5705 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5706 | } |
5707 | ||
5f5c8ee5 GM |
5708 | |
5709 | \f | |
5710 | /*********************************************************************** | |
5711 | Sleeping, Waiting | |
5712 | ***********************************************************************/ | |
5713 | ||
a7ca3326 | 5714 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 5715 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
5716 | SECONDS may be a floating-point value, meaning that you can wait for a |
5717 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
d35af63c | 5718 | additional wait period, in milliseconds; this is for backwards compatibility. |
7ee72033 | 5719 | \(Not all operating systems support waiting for a fraction of a second.) */) |
5842a27b | 5720 | (Lisp_Object seconds, Lisp_Object milliseconds) |
4588ec20 | 5721 | { |
d311d28c | 5722 | double duration = extract_float (seconds); |
4588ec20 | 5723 | |
d311d28c PE |
5724 | if (!NILP (milliseconds)) |
5725 | { | |
5726 | CHECK_NUMBER (milliseconds); | |
5727 | duration += XINT (milliseconds) / 1000.0; | |
5728 | } | |
b07646f5 | 5729 | |
908589fd | 5730 | if (duration > 0) |
d35af63c PE |
5731 | { |
5732 | EMACS_TIME t = EMACS_TIME_FROM_DOUBLE (duration); | |
f1dd8073 | 5733 | wait_reading_process_output (min (EMACS_SECS (t), WAIT_READING_MAX), |
d35af63c PE |
5734 | EMACS_NSECS (t), 0, 0, Qnil, NULL, 0); |
5735 | } | |
4588ec20 JB |
5736 | |
5737 | return Qnil; | |
5738 | } | |
5739 | ||
5f5c8ee5 | 5740 | |
dcd1ca45 | 5741 | /* This is just like wait_reading_process_output, except that |
902b9b6d | 5742 | it does redisplay. |
f76475ad | 5743 | |
2bcac766 CY |
5744 | TIMEOUT is number of seconds to wait (float or integer), |
5745 | or t to wait forever. | |
59ea14cd | 5746 | READING is true if reading input. |
9fa1de30 PE |
5747 | If DISPLAY_OPTION is >0 display process output while waiting. |
5748 | If DISPLAY_OPTION is >1 perform an initial redisplay before waiting. | |
902b9b6d | 5749 | */ |
4588ec20 | 5750 | |
f76475ad | 5751 | Lisp_Object |
9fa1de30 | 5752 | sit_for (Lisp_Object timeout, bool reading, int display_option) |
f76475ad | 5753 | { |
d35af63c PE |
5754 | intmax_t sec; |
5755 | int nsec; | |
9fa1de30 | 5756 | bool do_display = display_option > 0; |
f222369e | 5757 | |
902b9b6d | 5758 | swallow_events (do_display); |
ccddf474 | 5759 | |
902b9b6d | 5760 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 5761 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 5762 | return Qnil; |
4588ec20 | 5763 | |
9fa1de30 | 5764 | if (display_option > 1) |
902b9b6d KS |
5765 | redisplay_preserve_echo_area (2); |
5766 | ||
d35af63c | 5767 | if (INTEGERP (timeout)) |
2bcac766 | 5768 | { |
d35af63c | 5769 | sec = XINT (timeout); |
908589fd | 5770 | if (sec <= 0) |
d35af63c PE |
5771 | return Qt; |
5772 | nsec = 0; | |
2bcac766 | 5773 | } |
d35af63c | 5774 | else if (FLOATP (timeout)) |
d311d28c | 5775 | { |
d35af63c | 5776 | double seconds = XFLOAT_DATA (timeout); |
7216e43b | 5777 | if (! (0 < seconds)) |
d311d28c | 5778 | return Qt; |
d35af63c PE |
5779 | else |
5780 | { | |
5781 | EMACS_TIME t = EMACS_TIME_FROM_DOUBLE (seconds); | |
f1dd8073 | 5782 | sec = min (EMACS_SECS (t), WAIT_READING_MAX); |
d35af63c PE |
5783 | nsec = EMACS_NSECS (t); |
5784 | } | |
5785 | } | |
5786 | else if (EQ (timeout, Qt)) | |
5787 | { | |
5788 | sec = 0; | |
5789 | nsec = 0; | |
d311d28c | 5790 | } |
d35af63c PE |
5791 | else |
5792 | wrong_type_argument (Qnumberp, timeout); | |
5793 | ||
dfdb645c | 5794 | |
4a4bbad2 | 5795 | #ifdef USABLE_SIGIO |
f75beb47 | 5796 | gobble_input (); |
f76475ad JB |
5797 | #endif |
5798 | ||
d35af63c | 5799 | wait_reading_process_output (sec, nsec, reading ? -1 : 1, do_display, |
dcd1ca45 | 5800 | Qnil, NULL, 0); |
f76475ad | 5801 | |
4588ec20 JB |
5802 | return detect_input_pending () ? Qnil : Qt; |
5803 | } | |
5804 | ||
5f5c8ee5 | 5805 | |
a7ca3326 | 5806 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
025de85b CY |
5807 | doc: /* Perform redisplay. |
5808 | Optional arg FORCE, if non-nil, prevents redisplay from being | |
5809 | preempted by arriving input, even if `redisplay-dont-pause' is nil. | |
5810 | If `redisplay-dont-pause' is non-nil (the default), redisplay is never | |
5811 | preempted by arriving input, so FORCE does nothing. | |
5812 | ||
5813 | Return t if redisplay was performed, nil if redisplay was preempted | |
5814 | immediately by pending input. */) | |
5842a27b | 5815 | (Lisp_Object force) |
f76475ad | 5816 | { |
d311d28c | 5817 | ptrdiff_t count; |
659d9874 | 5818 | |
902b9b6d KS |
5819 | swallow_events (1); |
5820 | if ((detect_input_pending_run_timers (1) | |
01327edf | 5821 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
5822 | || !NILP (Vexecuting_kbd_macro)) |
5823 | return Qnil; | |
f76475ad | 5824 | |
01327edf KS |
5825 | count = SPECPDL_INDEX (); |
5826 | if (!NILP (force) && !redisplay_dont_pause) | |
5827 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 5828 | redisplay_preserve_echo_area (2); |
01327edf | 5829 | unbind_to (count, Qnil); |
7ba07a1a | 5830 | return Qt; |
f76475ad | 5831 | } |
5f5c8ee5 GM |
5832 | |
5833 | ||
5834 | \f | |
5835 | /*********************************************************************** | |
5836 | Other Lisp Functions | |
5837 | ***********************************************************************/ | |
5838 | ||
5839 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
5840 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 5841 | buffer-modified-flags. */ |
5f5c8ee5 GM |
5842 | |
5843 | static Lisp_Object frame_and_buffer_state; | |
5844 | ||
5845 | ||
5846 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 5847 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 5848 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
5849 | VARIABLE is a variable name whose value is either nil or a state vector |
5850 | that will be updated to contain all frames and buffers, | |
228299fa | 5851 | aside from buffers whose names start with space, |
44edd521 RS |
5852 | along with the buffers' read-only and modified flags. This allows a fast |
5853 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 5854 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
5855 | the current state. |
5856 | ||
5857 | If VARIABLE is nil, an internal variable is used. Users should not | |
5858 | pass nil for VARIABLE. */) | |
5842a27b | 5859 | (Lisp_Object variable) |
5f5c8ee5 | 5860 | { |
44edd521 | 5861 | Lisp_Object state, tail, frame, buf; |
086ca913 | 5862 | ptrdiff_t n, idx; |
5f5c8ee5 | 5863 | |
44edd521 RS |
5864 | if (! NILP (variable)) |
5865 | { | |
5866 | CHECK_SYMBOL (variable); | |
5867 | state = Fsymbol_value (variable); | |
5868 | if (! VECTORP (state)) | |
5869 | goto changed; | |
5870 | } | |
5871 | else | |
5872 | state = frame_and_buffer_state; | |
5873 | ||
086ca913 | 5874 | idx = 0; |
5f5c8ee5 GM |
5875 | FOR_EACH_FRAME (tail, frame) |
5876 | { | |
086ca913 | 5877 | if (idx == ASIZE (state)) |
44edd521 | 5878 | goto changed; |
086ca913 | 5879 | if (!EQ (AREF (state, idx++), frame)) |
5f5c8ee5 | 5880 | goto changed; |
086ca913 | 5881 | if (idx == ASIZE (state)) |
44edd521 | 5882 | goto changed; |
086ca913 | 5883 | if (!EQ (AREF (state, idx++), XFRAME (frame)->name)) |
5f5c8ee5 GM |
5884 | goto changed; |
5885 | } | |
44edd521 | 5886 | /* Check that the buffer info matches. */ |
7539e11f | 5887 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 5888 | { |
7539e11f | 5889 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 5890 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 5891 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 5892 | continue; |
086ca913 | 5893 | if (idx == ASIZE (state)) |
44edd521 | 5894 | goto changed; |
086ca913 | 5895 | if (!EQ (AREF (state, idx++), buf)) |
5f5c8ee5 | 5896 | goto changed; |
086ca913 | 5897 | if (idx == ASIZE (state)) |
44edd521 | 5898 | goto changed; |
086ca913 | 5899 | if (!EQ (AREF (state, idx++), BVAR (XBUFFER (buf), read_only))) |
5f5c8ee5 | 5900 | goto changed; |
086ca913 | 5901 | if (idx == ASIZE (state)) |
44edd521 | 5902 | goto changed; |
086ca913 | 5903 | if (!EQ (AREF (state, idx++), Fbuffer_modified_p (buf))) |
5f5c8ee5 GM |
5904 | goto changed; |
5905 | } | |
086ca913 | 5906 | if (idx == ASIZE (state)) |
44edd521 | 5907 | goto changed; |
5f5c8ee5 | 5908 | /* Detect deletion of a buffer at the end of the list. */ |
086ca913 | 5909 | if (EQ (AREF (state, idx), Qlambda)) |
5f5c8ee5 | 5910 | return Qnil; |
44edd521 RS |
5911 | |
5912 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 5913 | changed: |
44edd521 RS |
5914 | /* Count the size we will need. |
5915 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
5916 | n = 1; |
5917 | FOR_EACH_FRAME (tail, frame) | |
5918 | n += 2; | |
7539e11f | 5919 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 5920 | n += 3; |
44edd521 RS |
5921 | /* Reallocate the vector if data has grown to need it, |
5922 | or if it has shrunk a lot. */ | |
5923 | if (! VECTORP (state) | |
77b37c05 PE |
5924 | || n > ASIZE (state) |
5925 | || n + 20 < ASIZE (state) / 2) | |
5f5c8ee5 | 5926 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
5927 | { |
5928 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
5929 | if (! NILP (variable)) | |
5930 | Fset (variable, state); | |
5931 | else | |
5932 | frame_and_buffer_state = state; | |
5933 | } | |
5934 | ||
5935 | /* Record the new data in the (possibly reallocated) vector. */ | |
086ca913 | 5936 | idx = 0; |
5f5c8ee5 GM |
5937 | FOR_EACH_FRAME (tail, frame) |
5938 | { | |
086ca913 DA |
5939 | ASET (state, idx, frame); |
5940 | idx++; | |
5941 | ASET (state, idx, XFRAME (frame)->name); | |
5942 | idx++; | |
5f5c8ee5 | 5943 | } |
7539e11f | 5944 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 5945 | { |
7539e11f | 5946 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 5947 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 5948 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 5949 | continue; |
086ca913 DA |
5950 | ASET (state, idx, buf); |
5951 | idx++; | |
5952 | ASET (state, idx, BVAR (XBUFFER (buf), read_only)); | |
5953 | idx++; | |
5954 | ASET (state, idx, Fbuffer_modified_p (buf)); | |
5955 | idx++; | |
5f5c8ee5 GM |
5956 | } |
5957 | /* Fill up the vector with lambdas (always at least one). */ | |
086ca913 DA |
5958 | ASET (state, idx, Qlambda); |
5959 | idx++; | |
5960 | while (idx < ASIZE (state)) | |
5961 | { | |
5962 | ASET (state, idx, Qlambda); | |
5963 | idx++; | |
5964 | } | |
5f5c8ee5 | 5965 | /* Make sure we didn't overflow the vector. */ |
086ca913 | 5966 | eassert (idx <= ASIZE (state)); |
5f5c8ee5 GM |
5967 | return Qt; |
5968 | } | |
5969 | ||
5970 | ||
4588ec20 | 5971 | \f |
5f5c8ee5 GM |
5972 | /*********************************************************************** |
5973 | Initialization | |
5974 | ***********************************************************************/ | |
5975 | ||
5f5c8ee5 GM |
5976 | /* Initialization done when Emacs fork is started, before doing stty. |
5977 | Determine terminal type and set terminal_driver. Then invoke its | |
5978 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 5979 | |
dfcf069d | 5980 | void |
971de7fb | 5981 | init_display (void) |
4588ec20 | 5982 | { |
28d440ab KL |
5983 | char *terminal_type; |
5984 | ||
5f5c8ee5 GM |
5985 | /* Construct the space glyph. */ |
5986 | space_glyph.type = CHAR_GLYPH; | |
3fc809e2 | 5987 | SET_CHAR_GLYPH (space_glyph, ' ', DEFAULT_FACE_ID, 0); |
5f5c8ee5 GM |
5988 | space_glyph.charpos = -1; |
5989 | ||
4588ec20 JB |
5990 | inverse_video = 0; |
5991 | cursor_in_echo_area = 0; | |
4588ec20 | 5992 | |
1315c181 JB |
5993 | /* Now is the time to initialize this; it's used by init_sys_modes |
5994 | during startup. */ | |
2246281f | 5995 | Vinitial_window_system = Qnil; |
4588ec20 | 5996 | |
4181ad9c KL |
5997 | /* SIGWINCH needs to be handled no matter what display we start |
5998 | with. Otherwise newly opened tty frames will not resize | |
5999 | automatically. */ | |
6000 | #ifdef SIGWINCH | |
6001 | #ifndef CANNOT_DUMP | |
6002 | if (initialized) | |
6003 | #endif /* CANNOT_DUMP */ | |
2fe28299 PE |
6004 | { |
6005 | struct sigaction action; | |
6006 | emacs_sigaction_init (&action, deliver_window_change_signal); | |
6007 | sigaction (SIGWINCH, &action, 0); | |
6008 | } | |
4181ad9c | 6009 | #endif /* SIGWINCH */ |
4588ec20 | 6010 | |
d6ef42b9 | 6011 | /* If running as a daemon, no need to initialize any frames/terminal. */ |
ff808935 DN |
6012 | if (IS_DAEMON) |
6013 | return; | |
d6ef42b9 | 6014 | |
1315c181 JB |
6015 | /* If the user wants to use a window system, we shouldn't bother |
6016 | initializing the terminal. This is especially important when the | |
6017 | terminal is so dumb that emacs gives up before and doesn't bother | |
6018 | using the window system. | |
4588ec20 | 6019 | |
36bbad1d KH |
6020 | If the DISPLAY environment variable is set and nonempty, |
6021 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6022 | |
6023 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 6024 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 6025 | { |
36bbad1d | 6026 | char *display; |
36bbad1d | 6027 | display = getenv ("DISPLAY"); |
36bbad1d | 6028 | display_arg = (display != 0 && *display != 0); |
c1fc674b AS |
6029 | |
6030 | if (display_arg && !x_display_ok (display)) | |
6031 | { | |
6032 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
6033 | display); | |
6034 | inhibit_window_system = 1; | |
6035 | } | |
f040093a | 6036 | } |
d460af17 | 6037 | |
4fcc2638 | 6038 | if (!inhibit_window_system && display_arg) |
4588ec20 | 6039 | { |
111d9af3 | 6040 | Vinitial_window_system = Qx; |
4588ec20 JB |
6041 | #ifdef HAVE_X11 |
6042 | Vwindow_system_version = make_number (11); | |
039e5d71 | 6043 | #endif |
a29c3e6d | 6044 | #ifdef USE_NCURSES |
039e5d71 | 6045 | /* In some versions of ncurses, |
6a428f77 | 6046 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6047 | So call tgetent. */ |
6048 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 JB |
6049 | #endif |
6050 | return; | |
6051 | } | |
6052 | #endif /* HAVE_X_WINDOWS */ | |
6053 | ||
fd2e066a | 6054 | #ifdef HAVE_NTGUI |
177c0ea7 | 6055 | if (!inhibit_window_system) |
fd2e066a | 6056 | { |
111d9af3 | 6057 | Vinitial_window_system = Qw32; |
fd2e066a GV |
6058 | Vwindow_system_version = make_number (1); |
6059 | return; | |
6060 | } | |
6061 | #endif /* HAVE_NTGUI */ | |
6062 | ||
edfda783 AR |
6063 | #ifdef HAVE_NS |
6064 | if (!inhibit_window_system | |
6065 | #ifndef CANNOT_DUMP | |
6066 | && initialized | |
6067 | #endif | |
6068 | ) | |
6069 | { | |
111d9af3 | 6070 | Vinitial_window_system = Qns; |
5e617bc2 | 6071 | Vwindow_system_version = make_number (10); |
edfda783 AR |
6072 | return; |
6073 | } | |
6074 | #endif | |
6075 | ||
4588ec20 JB |
6076 | /* If no window system has been specified, try to use the terminal. */ |
6077 | if (! isatty (0)) | |
d9df6f40 | 6078 | fatal ("standard input is not a tty"); |
4588ec20 | 6079 | |
6152361f JR |
6080 | #ifdef WINDOWSNT |
6081 | terminal_type = "w32console"; | |
6082 | #else | |
83be8524 | 6083 | terminal_type = getenv ("TERM"); |
6152361f | 6084 | #endif |
4588ec20 JB |
6085 | if (!terminal_type) |
6086 | { | |
5d12ff0b | 6087 | #ifdef HAVE_WINDOW_SYSTEM |
b9e590fc RS |
6088 | if (! inhibit_window_system) |
6089 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6090 | else |
6091 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6092 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
4588ec20 JB |
6093 | exit (1); |
6094 | } | |
6095 | ||
0a125897 | 6096 | { |
6ed8eeff | 6097 | struct terminal *t; |
3224dac1 KL |
6098 | struct frame *f = XFRAME (selected_frame); |
6099 | ||
322aea6d PE |
6100 | init_foreground_group (); |
6101 | ||
3224dac1 | 6102 | /* Open a display on the controlling tty. */ |
6ed8eeff | 6103 | t = init_tty (0, terminal_type, 1); /* Errors are fatal. */ |
3224dac1 KL |
6104 | |
6105 | /* Convert the initial frame to use the new display. */ | |
b04f5ad2 | 6106 | if (f->output_method != output_initial) |
1088b922 | 6107 | emacs_abort (); |
6ed8eeff KL |
6108 | f->output_method = t->type; |
6109 | f->terminal = t; | |
3224dac1 | 6110 | |
6ed8eeff | 6111 | t->reference_count++; |
7ac5dac9 EZ |
6112 | #ifdef MSDOS |
6113 | f->output_data.tty->display_info = &the_only_display_info; | |
6114 | #else | |
6115 | if (f->output_method == output_termcap) | |
6116 | create_tty_output (f); | |
6117 | #endif | |
6ed8eeff | 6118 | t->display_info.tty->top_frame = selected_frame; |
5b65d888 | 6119 | change_frame_size (XFRAME (selected_frame), |
6ed8eeff KL |
6120 | FrameRows (t->display_info.tty), |
6121 | FrameCols (t->display_info.tty), 0, 0, 1); | |
3224dac1 | 6122 | |
6ed8eeff KL |
6123 | /* Delete the initial terminal. */ |
6124 | if (--initial_terminal->reference_count == 0 | |
6125 | && initial_terminal->delete_terminal_hook) | |
6126 | (*initial_terminal->delete_terminal_hook) (initial_terminal); | |
2666355c KL |
6127 | |
6128 | /* Update frame parameters to reflect the new type. */ | |
6129 | Fmodify_frame_parameters | |
6c6f1994 PE |
6130 | (selected_frame, list1 (Fcons (Qtty_type, |
6131 | Ftty_type (selected_frame)))); | |
657ceaa0 | 6132 | if (t->display_info.tty->name) |
6c6f1994 PE |
6133 | Fmodify_frame_parameters |
6134 | (selected_frame, | |
6135 | list1 (Fcons (Qtty, build_string (t->display_info.tty->name)))); | |
657ceaa0 | 6136 | else |
6c6f1994 | 6137 | Fmodify_frame_parameters (selected_frame, list1 (Fcons (Qtty, Qnil))); |
0a125897 | 6138 | } |
3fc809e2 | 6139 | |
d86c299a | 6140 | { |
91fb7e1b | 6141 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6142 | int width = FRAME_TOTAL_COLS (sf); |
6143 | int height = FRAME_LINES (sf); | |
d86c299a | 6144 | |
5f5c8ee5 | 6145 | /* If these sizes are so big they cause overflow, just ignore the |
dfd153ae PE |
6146 | change. It's not clear what better we could do. The rest of |
6147 | the code assumes that (width + 2) * height * sizeof (struct glyph) | |
6148 | does not overflow and does not exceed PTRDIFF_MAX or SIZE_MAX. */ | |
e3c25c68 PE |
6149 | if (INT_ADD_RANGE_OVERFLOW (width, 2, INT_MIN, INT_MAX) |
6150 | || INT_MULTIPLY_RANGE_OVERFLOW (width + 2, height, INT_MIN, INT_MAX) | |
dfd153ae PE |
6151 | || (min (PTRDIFF_MAX, SIZE_MAX) / sizeof (struct glyph) |
6152 | < (width + 2) * height)) | |
1559a86d | 6153 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6154 | } |
6155 | ||
91fb7e1b | 6156 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6157 | |
5f5c8ee5 GM |
6158 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ |
6159 | if (initialized | |
6160 | && !noninteractive | |
2246281f | 6161 | && NILP (Vinitial_window_system)) |
2d764c78 EZ |
6162 | { |
6163 | /* For the initial frame, we don't have any way of knowing what | |
6164 | are the foreground and background colors of the terminal. */ | |
5e617bc2 | 6165 | struct frame *sf = SELECTED_FRAME (); |
2d764c78 | 6166 | |
f9d2fdc4 EZ |
6167 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
6168 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
6169 | call0 (intern ("tty-set-up-initial-frame-faces")); |
6170 | } | |
5f5c8ee5 GM |
6171 | } |
6172 | ||
6173 | ||
6174 | \f | |
6175 | /*********************************************************************** | |
6176 | Blinking cursor | |
6177 | ***********************************************************************/ | |
6178 | ||
c3f13540 | 6179 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 6180 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 6181 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
6182 | WINDOW nil means use the selected window. SHOW non-nil means |
6183 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 | 6184 | don't show a cursor. */) |
5842a27b | 6185 | (Lisp_Object window, Lisp_Object show) |
5f5c8ee5 | 6186 | { |
5f5c8ee5 GM |
6187 | /* Don't change cursor state while redisplaying. This could confuse |
6188 | output routines. */ | |
6189 | if (!redisplaying_p) | |
b9e9df47 | 6190 | decode_any_window (window)->cursor_off_p = NILP (show); |
5f5c8ee5 | 6191 | return Qnil; |
4588ec20 | 6192 | } |
5f5c8ee5 GM |
6193 | |
6194 | ||
5d7791b3 GM |
6195 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
6196 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 6197 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 | 6198 | WINDOW nil or omitted means report on the selected window. */) |
5842a27b | 6199 | (Lisp_Object window) |
5d7791b3 | 6200 | { |
b9e9df47 | 6201 | return decode_any_window (window)->cursor_off_p ? Qnil : Qt; |
5d7791b3 GM |
6202 | } |
6203 | ||
87478b52 SM |
6204 | DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame, |
6205 | Slast_nonminibuf_frame, 0, 0, 0, | |
6206 | doc: /* Value is last nonminibuffer frame. */) | |
5842a27b | 6207 | (void) |
87478b52 | 6208 | { |
4958ed94 | 6209 | Lisp_Object frame = Qnil; |
87478b52 | 6210 | |
4958ed94 SM |
6211 | if (last_nonminibuf_frame) |
6212 | XSETFRAME (frame, last_nonminibuf_frame); | |
87478b52 SM |
6213 | |
6214 | return frame; | |
6215 | } | |
4588ec20 | 6216 | \f |
5f5c8ee5 GM |
6217 | /*********************************************************************** |
6218 | Initialization | |
6219 | ***********************************************************************/ | |
6220 | ||
dfcf069d | 6221 | void |
971de7fb | 6222 | syms_of_display (void) |
4588ec20 | 6223 | { |
502b9b64 | 6224 | defsubr (&Sredraw_frame); |
4588ec20 | 6225 | defsubr (&Sredraw_display); |
078b3696 | 6226 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
6227 | defsubr (&Sopen_termscript); |
6228 | defsubr (&Sding); | |
7ba07a1a | 6229 | defsubr (&Sredisplay); |
4588ec20 JB |
6230 | defsubr (&Ssleep_for); |
6231 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 6232 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 6233 | defsubr (&Sinternal_show_cursor_p); |
87478b52 | 6234 | defsubr (&Slast_nonminibuf_frame); |
4588ec20 | 6235 | |
e509cfa6 | 6236 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
6237 | defsubr (&Sdump_redisplay_history); |
6238 | #endif | |
6239 | ||
d1dad759 | 6240 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
6241 | staticpro (&frame_and_buffer_state); |
6242 | ||
cd3520a4 JB |
6243 | DEFSYM (Qdisplay_table, "display-table"); |
6244 | DEFSYM (Qredisplay_dont_pause, "redisplay-dont-pause"); | |
9cda4f7c | 6245 | |
29208e82 | 6246 | DEFVAR_INT ("baud-rate", baud_rate, |
025de85b | 6247 | doc: /* The output baud rate of the terminal. |
228299fa GM |
6248 | On most systems, changing this value will affect the amount of padding |
6249 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 6250 | |
29208e82 | 6251 | DEFVAR_BOOL ("inverse-video", inverse_video, |
025de85b | 6252 | doc: /* Non-nil means invert the entire frame display. |
228299fa | 6253 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 6254 | |
29208e82 | 6255 | DEFVAR_BOOL ("visible-bell", visible_bell, |
025de85b | 6256 | doc: /* Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
6257 | |
6258 | See also `ring-bell-function'. */); | |
177c0ea7 | 6259 | |
29208e82 | 6260 | DEFVAR_BOOL ("no-redraw-on-reenter", no_redraw_on_reenter, |
025de85b | 6261 | doc: /* Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
6262 | A non-nil value is useful if the terminal can automatically preserve |
6263 | Emacs's frame display when you reenter Emacs. | |
6264 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 6265 | |
29208e82 | 6266 | DEFVAR_LISP ("initial-window-system", Vinitial_window_system, |
2246281f | 6267 | doc: /* Name of the window system that Emacs uses for the first frame. |
89baa1df EZ |
6268 | The value is a symbol: |
6269 | nil for a termcap frame (a character-only terminal), | |
6270 | 'x' for an Emacs frame that is really an X window, | |
6271 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6272 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6273 | 'pc' for a direct-write MS-DOS frame. | |
6274 | ||
6275 | Use of this variable as a boolean is deprecated. Instead, | |
6276 | use `display-graphic-p' or any of the other `display-*-p' | |
6277 | predicates which report frame's specific UI-related capabilities. */); | |
177c0ea7 | 6278 | |
70b8d0a4 SM |
6279 | DEFVAR_KBOARD ("window-system", Vwindow_system, |
6280 | doc: /* Name of window system through which the selected frame is displayed. | |
89baa1df EZ |
6281 | The value is a symbol: |
6282 | nil for a termcap frame (a character-only terminal), | |
6283 | 'x' for an Emacs frame that is really an X window, | |
6284 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6285 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6286 | 'pc' for a direct-write MS-DOS frame. | |
6287 | ||
6288 | Use of this variable as a boolean is deprecated. Instead, | |
6289 | use `display-graphic-p' or any of the other `display-*-p' | |
6290 | predicates which report frame's specific UI-related capabilities. */); | |
70b8d0a4 | 6291 | |
29208e82 | 6292 | DEFVAR_LISP ("window-system-version", Vwindow_system_version, |
bacf09b4 | 6293 | doc: /* The version number of the window system in use. |
c22140f6 | 6294 | For X windows, this is 11. */); |
177c0ea7 | 6295 | |
29208e82 | 6296 | DEFVAR_BOOL ("cursor-in-echo-area", cursor_in_echo_area, |
bacf09b4 | 6297 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 6298 | |
29208e82 | 6299 | DEFVAR_LISP ("glyph-table", Vglyph_table, |
bacf09b4 | 6300 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
6301 | If not nil, this is a vector indexed by glyph code to define the glyph. |
6302 | Each element can be: | |
6303 | integer: a glyph code which this glyph is an alias for. | |
6304 | string: output this glyph using that string (not impl. in X windows). | |
6305 | nil: this glyph mod 524288 is the code of a character to output, | |
6306 | and this glyph / 524288 is the face number (see `face-id') to use | |
6307 | while outputting it. */); | |
4588ec20 JB |
6308 | Vglyph_table = Qnil; |
6309 | ||
29208e82 | 6310 | DEFVAR_LISP ("standard-display-table", Vstandard_display_table, |
bacf09b4 | 6311 | doc: /* Display table to use for buffers that specify none. |
228299fa | 6312 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
6313 | Vstandard_display_table = Qnil; |
6314 | ||
29208e82 | 6315 | DEFVAR_BOOL ("redisplay-dont-pause", redisplay_dont_pause, |
025de85b | 6316 | doc: /* Non-nil means display update isn't paused when input is detected. */); |
6bf7006f | 6317 | redisplay_dont_pause = 1; |
5f5c8ee5 | 6318 | |
4588ec20 JB |
6319 | #ifdef CANNOT_DUMP |
6320 | if (noninteractive) | |
6321 | #endif | |
6322 | { | |
2246281f | 6323 | Vinitial_window_system = Qnil; |
4588ec20 JB |
6324 | Vwindow_system_version = Qnil; |
6325 | } | |
6326 | } |