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 | |
f0b79313 DA |
151 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
152 | ||
5f5c8ee5 GM |
153 | /* Counts of allocated structures. These counts serve to diagnose |
154 | memory leaks and double frees. */ | |
4588ec20 | 155 | |
5bf46f05 PE |
156 | static int glyph_matrix_count; |
157 | static int glyph_pool_count; | |
4588ec20 | 158 | |
f0b79313 DA |
159 | #endif /* GLYPH_DEBUG and ENABLE_CHECKING */ |
160 | ||
5f5c8ee5 GM |
161 | /* If non-null, the frame whose frame matrices are manipulated. If |
162 | null, window matrices are worked on. */ | |
4588ec20 | 163 | |
5f5c8ee5 | 164 | static struct frame *frame_matrix_frame; |
4588ec20 | 165 | |
59ea14cd | 166 | /* True means that fonts have been loaded since the last glyph |
5f5c8ee5 | 167 | matrix adjustments. Redisplay must stop, and glyph matrices must |
59ea14cd | 168 | be adjusted when this flag becomes true during display. The |
5f5c8ee5 | 169 | reason fonts can be loaded so late is that fonts of fontsets are |
3aa9f0c4 KH |
170 | loaded on demand. Another reason is that a line contains many |
171 | characters displayed by zero width or very narrow glyphs of | |
172 | variable-width fonts. */ | |
836d2cde | 173 | |
59ea14cd | 174 | bool fonts_changed_p; |
836d2cde | 175 | |
177c0ea7 | 176 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 177 | This may only be used for terminal frames. */ |
836d2cde | 178 | |
e509cfa6 | 179 | #ifdef GLYPH_DEBUG |
4588ec20 | 180 | |
f57e2426 J |
181 | static int window_to_frame_vpos (struct window *, int); |
182 | static int window_to_frame_hpos (struct window *, int); | |
5f5c8ee5 GM |
183 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) |
184 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 185 | |
9b0e97aa GM |
186 | /* One element of the ring buffer containing redisplay history |
187 | information. */ | |
188 | ||
189 | struct redisplay_history | |
190 | { | |
191 | char trace[512 + 100]; | |
192 | }; | |
193 | ||
194 | /* The size of the history buffer. */ | |
195 | ||
196 | #define REDISPLAY_HISTORY_SIZE 30 | |
197 | ||
198 | /* The redisplay history buffer. */ | |
199 | ||
200 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
201 | ||
202 | /* Next free entry in redisplay_history. */ | |
203 | ||
204 | static int history_idx; | |
205 | ||
206 | /* A tick that's incremented each time something is added to the | |
207 | history. */ | |
208 | ||
dfd153ae | 209 | static uprintmax_t history_tick; |
6a8aec41 | 210 | \f |
9b0e97aa GM |
211 | /* Add to the redisplay history how window W has been displayed. |
212 | MSG is a trace containing the information how W's glyph matrix | |
59ea14cd | 213 | has been constructed. PAUSED_P means that the update |
9b0e97aa GM |
214 | has been interrupted for pending input. */ |
215 | ||
216 | static void | |
59ea14cd | 217 | add_window_display_history (struct window *w, const char *msg, bool paused_p) |
9b0e97aa GM |
218 | { |
219 | char *buf; | |
29abe551 | 220 | void *ptr = w; |
177c0ea7 | 221 | |
9b0e97aa GM |
222 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
223 | history_idx = 0; | |
224 | buf = redisplay_history[history_idx].trace; | |
225 | ++history_idx; | |
177c0ea7 | 226 | |
8666506e PE |
227 | snprintf (buf, sizeof redisplay_history[0].trace, |
228 | "%"pMu": window %p (`%s')%s\n%s", | |
229 | history_tick++, | |
29abe551 | 230 | ptr, |
e74aeda8 DA |
231 | ((BUFFERP (w->contents) |
232 | && STRINGP (BVAR (XBUFFER (w->contents), name))) | |
233 | ? SSDATA (BVAR (XBUFFER (w->contents), name)) | |
8666506e PE |
234 | : "???"), |
235 | paused_p ? " ***paused***" : "", | |
236 | msg); | |
9b0e97aa GM |
237 | } |
238 | ||
239 | ||
240 | /* Add to the redisplay history that frame F has been displayed. | |
59ea14cd | 241 | PAUSED_P means that the update has been interrupted for |
9b0e97aa GM |
242 | pending input. */ |
243 | ||
244 | static void | |
59ea14cd | 245 | add_frame_display_history (struct frame *f, bool paused_p) |
9b0e97aa GM |
246 | { |
247 | char *buf; | |
29abe551 | 248 | void *ptr = f; |
177c0ea7 | 249 | |
9b0e97aa GM |
250 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
251 | history_idx = 0; | |
252 | buf = redisplay_history[history_idx].trace; | |
253 | ++history_idx; | |
177c0ea7 | 254 | |
dfd153ae | 255 | sprintf (buf, "%"pMu": update frame %p%s", |
9b0e97aa | 256 | history_tick++, |
29abe551 | 257 | ptr, paused_p ? " ***paused***" : ""); |
9b0e97aa GM |
258 | } |
259 | ||
260 | ||
a7ca3326 | 261 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, |
9b0e97aa | 262 | Sdump_redisplay_history, 0, 0, "", |
7ee72033 | 263 | doc: /* Dump redisplay history to stderr. */) |
5842a27b | 264 | (void) |
9b0e97aa GM |
265 | { |
266 | int i; | |
267 | ||
268 | for (i = history_idx - 1; i != history_idx; --i) | |
269 | { | |
270 | if (i < 0) | |
271 | i = REDISPLAY_HISTORY_SIZE - 1; | |
272 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
273 | } | |
274 | ||
275 | return Qnil; | |
276 | } | |
277 | ||
278 | ||
e509cfa6 | 279 | #else /* not GLYPH_DEBUG */ |
4588ec20 | 280 | |
7df02016 KS |
281 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
282 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 283 | |
e509cfa6 | 284 | #endif /* GLYPH_DEBUG */ |
4588ec20 | 285 | |
4588ec20 | 286 | |
9e4bf381 PE |
287 | #if (defined PROFILING \ |
288 | && (defined __FreeBSD__ || defined GNU_LINUX || defined __MINGW32__) \ | |
289 | && !HAVE___EXECUTABLE_START) | |
290 | /* This function comes first in the Emacs executable and is used only | |
291 | to estimate the text start for profiling. */ | |
4588ec20 | 292 | void |
9e4bf381 | 293 | __executable_start (void) |
4588ec20 | 294 | { |
1088b922 | 295 | emacs_abort (); |
177c0ea7 | 296 | } |
72af86bd | 297 | #endif |
5f5c8ee5 GM |
298 | \f |
299 | /*********************************************************************** | |
300 | Glyph Matrices | |
301 | ***********************************************************************/ | |
302 | ||
303 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
304 | pool from which memory for the matrix should be allocated, or null | |
305 | for window-based redisplay where no glyph pools are used. The | |
306 | member `pool' of the glyph matrix structure returned is set to | |
307 | POOL, the structure is otherwise zeroed. */ | |
308 | ||
5bf46f05 | 309 | static struct glyph_matrix * |
971de7fb | 310 | new_glyph_matrix (struct glyph_pool *pool) |
4588ec20 | 311 | { |
23f86fce | 312 | struct glyph_matrix *result = xzalloc (sizeof *result); |
4588ec20 | 313 | |
f0b79313 | 314 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
5f5c8ee5 GM |
315 | /* Increment number of allocated matrices. This count is used |
316 | to detect memory leaks. */ | |
317 | ++glyph_matrix_count; | |
f0b79313 | 318 | #endif |
4588ec20 | 319 | |
5f5c8ee5 GM |
320 | /* Set pool and return. */ |
321 | result->pool = pool; | |
322 | return result; | |
4588ec20 JB |
323 | } |
324 | ||
4588ec20 | 325 | |
5f5c8ee5 GM |
326 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
327 | ||
f0b79313 DA |
328 | If GLYPH_DEBUG and ENABLE_CHECKING are in effect, the global counter |
329 | glyph_matrix_count is decremented when a matrix is freed. If the count | |
330 | gets negative, more structures were freed than allocated, i.e. one matrix | |
331 | was freed more than once or a bogus pointer was passed to this function. | |
177c0ea7 | 332 | |
5f5c8ee5 GM |
333 | If MATRIX->pool is null, this means that the matrix manages its own |
334 | glyph memory---this is done for matrices on X frames. Freeing the | |
335 | matrix also frees the glyph memory in this case. */ | |
336 | ||
337 | static void | |
971de7fb | 338 | free_glyph_matrix (struct glyph_matrix *matrix) |
4588ec20 | 339 | { |
5f5c8ee5 GM |
340 | if (matrix) |
341 | { | |
342 | int i; | |
343 | ||
f0b79313 | 344 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
5f5c8ee5 GM |
345 | /* Detect the case that more matrices are freed than were |
346 | allocated. */ | |
f0b79313 DA |
347 | --glyph_matrix_count; |
348 | eassert (glyph_matrix_count >= 0); | |
349 | #endif | |
5f5c8ee5 GM |
350 | |
351 | /* Free glyph memory if MATRIX owns it. */ | |
352 | if (matrix->pool == NULL) | |
353 | for (i = 0; i < matrix->rows_allocated; ++i) | |
354 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 355 | |
5f5c8ee5 GM |
356 | /* Free row structures and the matrix itself. */ |
357 | xfree (matrix->rows); | |
358 | xfree (matrix); | |
359 | } | |
360 | } | |
4588ec20 | 361 | |
4588ec20 | 362 | |
5f5c8ee5 GM |
363 | /* Return the number of glyphs to reserve for a marginal area of |
364 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
365 | display line of window W. MARGIN gives the width of the marginal | |
366 | area in canonical character units. MARGIN should be an integer | |
367 | or a float. */ | |
368 | ||
369 | static int | |
971de7fb | 370 | margin_glyphs_to_reserve (struct window *w, int total_glyphs, Lisp_Object margin) |
5f5c8ee5 GM |
371 | { |
372 | int n; | |
4588ec20 | 373 | |
5f5c8ee5 | 374 | if (NUMBERP (margin)) |
4588ec20 | 375 | { |
5f24fa51 | 376 | int width = w->total_cols; |
5f5c8ee5 GM |
377 | double d = max (0, XFLOATINT (margin)); |
378 | d = min (width / 2 - 1, d); | |
35ec832e | 379 | n = (int) ((double) total_glyphs / width * d); |
5f5c8ee5 GM |
380 | } |
381 | else | |
382 | n = 0; | |
383 | ||
384 | return n; | |
385 | } | |
386 | ||
59ea14cd | 387 | /* Return true if ROW's hash value is correct. |
e509cfa6 DA |
388 | Optimized away if ENABLE_CHECKING is not defined. */ |
389 | ||
59ea14cd | 390 | static bool |
7a7270dd EZ |
391 | verify_row_hash (struct glyph_row *row) |
392 | { | |
015137db | 393 | return row->hash == row_hash (row); |
7a7270dd | 394 | } |
4588ec20 | 395 | |
5f5c8ee5 GM |
396 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
397 | window sizes. | |
4588ec20 | 398 | |
5f5c8ee5 GM |
399 | W is null if the function is called for a frame glyph matrix. |
400 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
401 | indices of the first column and row of MATRIX within the frame | |
402 | matrix, if such a matrix exists. They are zero for purely | |
403 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 404 | |
5f5c8ee5 GM |
405 | In window-based redisplay, where no frame matrices exist, glyph |
406 | matrices manage their own glyph storage. Otherwise, they allocate | |
407 | storage from a common frame glyph pool which can be found in | |
408 | MATRIX->pool. | |
23b0200c | 409 | |
5f5c8ee5 GM |
410 | The reason for this memory management strategy is to avoid complete |
411 | frame redraws if possible. When we allocate from a common pool, a | |
412 | change of the location or size of a sub-matrix within the pool | |
413 | requires a complete redisplay of the frame because we cannot easily | |
414 | make sure that the current matrices of all windows still agree with | |
415 | what is displayed on the screen. While this is usually fast, it | |
416 | leads to screen flickering. */ | |
23b0200c | 417 | |
5f5c8ee5 | 418 | static void |
971de7fb | 419 | adjust_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int x, int y, struct dim dim) |
5f5c8ee5 GM |
420 | { |
421 | int i; | |
422 | int new_rows; | |
59ea14cd PE |
423 | bool marginal_areas_changed_p = 0; |
424 | bool header_line_changed_p = 0; | |
425 | bool header_line_p = 0; | |
5f5c8ee5 | 426 | int left = -1, right = -1; |
ca8a12a7 | 427 | int window_width = -1, window_height = -1; |
5f5c8ee5 | 428 | |
6b61353c KH |
429 | /* See if W had a header line that has disappeared now, or vice versa. |
430 | Get W's size. */ | |
5f5c8ee5 GM |
431 | if (w) |
432 | { | |
6b61353c KH |
433 | window_box (w, -1, 0, 0, &window_width, &window_height); |
434 | ||
045dee35 GM |
435 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
436 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 437 | } |
045dee35 | 438 | matrix->header_line_p = header_line_p; |
23b0200c | 439 | |
6b61353c KH |
440 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
441 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
442 | haven't changed. This optimization is important because preserving |
443 | the matrix means preventing redisplay. */ | |
444 | if (matrix->pool == NULL) | |
445 | { | |
d3d50620 DA |
446 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
447 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
a54e2c05 | 448 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
449 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs |
450 | || right != matrix->right_margin_glyphs); | |
451 | ||
452 | if (!marginal_areas_changed_p | |
453 | && !fonts_changed_p | |
045dee35 | 454 | && !header_line_changed_p |
7df02016 KS |
455 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
456 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
457 | && matrix->window_height == window_height |
458 | && matrix->window_vscroll == w->vscroll | |
459 | && matrix->window_width == window_width) | |
460 | return; | |
461 | } | |
177c0ea7 | 462 | |
5f5c8ee5 GM |
463 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
464 | if (matrix->rows_allocated < dim.height) | |
465 | { | |
0065d054 | 466 | int old_alloc = matrix->rows_allocated; |
5f5c8ee5 | 467 | new_rows = dim.height - matrix->rows_allocated; |
0065d054 PE |
468 | matrix->rows = xpalloc (matrix->rows, &matrix->rows_allocated, |
469 | new_rows, INT_MAX, sizeof *matrix->rows); | |
470 | memset (matrix->rows + old_alloc, 0, | |
471 | (matrix->rows_allocated - old_alloc) * sizeof *matrix->rows); | |
5f5c8ee5 GM |
472 | } |
473 | else | |
474 | new_rows = 0; | |
60a8948a | 475 | |
5f5c8ee5 GM |
476 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
477 | on a frame not using window-based redisplay. Set up pointers for | |
478 | each row into the glyph pool. */ | |
479 | if (matrix->pool) | |
480 | { | |
a54e2c05 | 481 | eassert (matrix->pool->glyphs); |
177c0ea7 | 482 | |
5f5c8ee5 | 483 | if (w) |
60a8948a | 484 | { |
5f5c8ee5 | 485 | left = margin_glyphs_to_reserve (w, dim.width, |
d3d50620 | 486 | w->left_margin_cols); |
5f5c8ee5 | 487 | right = margin_glyphs_to_reserve (w, dim.width, |
d3d50620 | 488 | w->right_margin_cols); |
60a8948a | 489 | } |
5f5c8ee5 GM |
490 | else |
491 | left = right = 0; | |
177c0ea7 | 492 | |
5f5c8ee5 | 493 | for (i = 0; i < dim.height; ++i) |
60a8948a | 494 | { |
5f5c8ee5 | 495 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
496 | |
497 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
498 | = (matrix->pool->glyphs |
499 | + (y + i) * matrix->pool->ncolumns | |
500 | + x); | |
177c0ea7 | 501 | |
5f5c8ee5 GM |
502 | if (w == NULL |
503 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 504 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
505 | { |
506 | row->glyphs[TEXT_AREA] | |
507 | = row->glyphs[LEFT_MARGIN_AREA]; | |
508 | row->glyphs[RIGHT_MARGIN_AREA] | |
509 | = row->glyphs[TEXT_AREA] + dim.width; | |
510 | row->glyphs[LAST_AREA] | |
511 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
512 | } | |
513 | else | |
514 | { | |
515 | row->glyphs[TEXT_AREA] | |
516 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
517 | row->glyphs[RIGHT_MARGIN_AREA] | |
518 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
519 | row->glyphs[LAST_AREA] | |
520 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
521 | } | |
60a8948a | 522 | } |
177c0ea7 | 523 | |
5f5c8ee5 GM |
524 | matrix->left_margin_glyphs = left; |
525 | matrix->right_margin_glyphs = right; | |
526 | } | |
527 | else | |
528 | { | |
529 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
6b61353c KH |
530 | its own memory. It is a window matrix for window-based redisplay. |
531 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
532 | if (dim.width > matrix->matrix_w |
533 | || new_rows | |
045dee35 | 534 | || header_line_changed_p |
5f5c8ee5 | 535 | || marginal_areas_changed_p) |
4588ec20 | 536 | { |
5f5c8ee5 GM |
537 | struct glyph_row *row = matrix->rows; |
538 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 539 | |
5f5c8ee5 GM |
540 | while (row < end) |
541 | { | |
542 | row->glyphs[LEFT_MARGIN_AREA] | |
0065d054 PE |
543 | = xnrealloc (row->glyphs[LEFT_MARGIN_AREA], |
544 | dim.width, sizeof (struct glyph)); | |
177c0ea7 | 545 | |
5f5c8ee5 GM |
546 | /* The mode line never has marginal areas. */ |
547 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 548 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
549 | { |
550 | row->glyphs[TEXT_AREA] | |
551 | = row->glyphs[LEFT_MARGIN_AREA]; | |
552 | row->glyphs[RIGHT_MARGIN_AREA] | |
553 | = row->glyphs[TEXT_AREA] + dim.width; | |
554 | row->glyphs[LAST_AREA] | |
555 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
556 | } | |
557 | else | |
558 | { | |
559 | row->glyphs[TEXT_AREA] | |
560 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
561 | row->glyphs[RIGHT_MARGIN_AREA] | |
562 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
563 | row->glyphs[LAST_AREA] | |
564 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
565 | } | |
566 | ++row; | |
567 | } | |
4588ec20 JB |
568 | } |
569 | ||
a54e2c05 | 570 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
571 | matrix->left_margin_glyphs = left; |
572 | matrix->right_margin_glyphs = right; | |
573 | } | |
177c0ea7 | 574 | |
5f5c8ee5 GM |
575 | /* Number of rows to be used by MATRIX. */ |
576 | matrix->nrows = dim.height; | |
a54e2c05 | 577 | eassert (matrix->nrows >= 0); |
5f5c8ee5 | 578 | |
b7b20fbd | 579 | if (w) |
5f5c8ee5 | 580 | { |
b7b20fbd | 581 | if (matrix == w->current_matrix) |
4588ec20 | 582 | { |
b7b20fbd GM |
583 | /* Mark rows in a current matrix of a window as not having |
584 | valid contents. It's important to not do this for | |
585 | desired matrices. When Emacs starts, it may already be | |
586 | building desired matrices when this function runs. */ | |
587 | if (window_width < 0) | |
588 | window_width = window_box_width (w, -1); | |
177c0ea7 | 589 | |
b7b20fbd GM |
590 | /* Optimize the case that only the height has changed (C-x 2, |
591 | upper window). Invalidate all rows that are no longer part | |
592 | of the window. */ | |
593 | if (!marginal_areas_changed_p | |
73d75a62 GM |
594 | && !header_line_changed_p |
595 | && new_rows == 0 | |
596 | && dim.width == matrix->matrix_w | |
7df02016 KS |
597 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
598 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 599 | && matrix->window_width == window_width) |
b7b20fbd | 600 | { |
dd42b31a GM |
601 | /* Find the last row in the window. */ |
602 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
603 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
604 | { | |
26447967 | 605 | ++i; |
dd42b31a GM |
606 | break; |
607 | } | |
b7b20fbd GM |
608 | |
609 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 610 | are invalidated below. */ |
d3d50620 DA |
611 | if (INTEGERP (w->window_end_vpos) |
612 | && XFASTINT (w->window_end_vpos) >= i) | |
9d93ce29 | 613 | w->window_end_valid = 0; |
177c0ea7 | 614 | |
b7b20fbd GM |
615 | while (i < matrix->nrows) |
616 | matrix->rows[i++].enabled_p = 0; | |
617 | } | |
618 | else | |
619 | { | |
620 | for (i = 0; i < matrix->nrows; ++i) | |
621 | matrix->rows[i].enabled_p = 0; | |
622 | } | |
5f5c8ee5 | 623 | } |
b7b20fbd | 624 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 625 | { |
b7b20fbd GM |
626 | /* Rows in desired matrices always have to be cleared; |
627 | redisplay expects this is the case when it runs, so it | |
628 | had better be the case when we adjust matrices between | |
629 | redisplays. */ | |
5f5c8ee5 GM |
630 | for (i = 0; i < matrix->nrows; ++i) |
631 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 632 | } |
4588ec20 | 633 | } |
177c0ea7 JB |
634 | |
635 | ||
5f5c8ee5 GM |
636 | /* Remember last values to be able to optimize frame redraws. */ |
637 | matrix->matrix_x = x; | |
638 | matrix->matrix_y = y; | |
639 | matrix->matrix_w = dim.width; | |
640 | matrix->matrix_h = dim.height; | |
641 | ||
642 | /* Record the top y location and height of W at the time the matrix | |
643 | was last adjusted. This is used to optimize redisplay above. */ | |
644 | if (w) | |
4588ec20 | 645 | { |
7df02016 KS |
646 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
647 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
648 | matrix->window_height = window_height; |
649 | matrix->window_width = window_width; | |
650 | matrix->window_vscroll = w->vscroll; | |
651 | } | |
652 | } | |
4588ec20 | 653 | |
4588ec20 | 654 | |
5f5c8ee5 GM |
655 | /* Reverse the contents of rows in MATRIX between START and END. The |
656 | contents of the row at END - 1 end up at START, END - 2 at START + | |
657 | 1 etc. This is part of the implementation of rotate_matrix (see | |
658 | below). */ | |
d52bad65 | 659 | |
5f5c8ee5 | 660 | static void |
971de7fb | 661 | reverse_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 GM |
662 | { |
663 | int i, j; | |
23b0200c | 664 | |
5f5c8ee5 GM |
665 | for (i = start, j = end - 1; i < j; ++i, --j) |
666 | { | |
667 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
668 | initialization. */ | |
669 | struct glyph_row temp; | |
670 | temp = matrix->rows[i]; | |
671 | matrix->rows[i] = matrix->rows[j]; | |
672 | matrix->rows[j] = temp; | |
673 | } | |
674 | } | |
23b0200c | 675 | |
23b0200c | 676 | |
5f5c8ee5 GM |
677 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
678 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
679 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
680 | row structures are moved around). | |
60a8948a | 681 | |
5f5c8ee5 GM |
682 | The algorithm used for rotating the vector was, I believe, first |
683 | described by Kernighan. See the vector R as consisting of two | |
684 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
685 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
686 | and reverse the result to get (ArBr)r which is BA. Similar for | |
687 | rotating right. */ | |
688 | ||
689 | void | |
971de7fb | 690 | rotate_matrix (struct glyph_matrix *matrix, int first, int last, int by) |
5f5c8ee5 GM |
691 | { |
692 | if (by < 0) | |
693 | { | |
694 | /* Up (rotate left, i.e. towards lower indices). */ | |
695 | by = -by; | |
696 | reverse_rows (matrix, first, first + by); | |
697 | reverse_rows (matrix, first + by, last); | |
698 | reverse_rows (matrix, first, last); | |
699 | } | |
700 | else if (by > 0) | |
701 | { | |
702 | /* Down (rotate right, i.e. towards higher indices). */ | |
703 | reverse_rows (matrix, last - by, last); | |
704 | reverse_rows (matrix, first, last - by); | |
705 | reverse_rows (matrix, first, last); | |
706 | } | |
707 | } | |
708 | ||
709 | ||
710 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
711 | with indices START <= index < END. Increment positions by DELTA/ | |
712 | DELTA_BYTES. */ | |
713 | ||
714 | void | |
ace1712c | 715 | increment_matrix_positions (struct glyph_matrix *matrix, int start, int end, |
d311d28c | 716 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
717 | { |
718 | /* Check that START and END are reasonable values. */ | |
a54e2c05 DA |
719 | eassert (start >= 0 && start <= matrix->nrows); |
720 | eassert (end >= 0 && end <= matrix->nrows); | |
721 | eassert (start <= end); | |
5f5c8ee5 GM |
722 | |
723 | for (; start < end; ++start) | |
86c11ba1 | 724 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
725 | } |
726 | ||
727 | ||
59ea14cd PE |
728 | /* Clear the enable_p flags in a range of rows in glyph matrix MATRIX. |
729 | START and END are the row indices of the first and last + 1 row to clear. */ | |
5f5c8ee5 GM |
730 | |
731 | void | |
59ea14cd | 732 | clear_glyph_matrix_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 | 733 | { |
a54e2c05 DA |
734 | eassert (start <= end); |
735 | eassert (start >= 0 && start < matrix->nrows); | |
736 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 737 | |
5f5c8ee5 | 738 | for (; start < end; ++start) |
59ea14cd | 739 | matrix->rows[start].enabled_p = 0; |
5f5c8ee5 GM |
740 | } |
741 | ||
742 | ||
743 | /* Clear MATRIX. | |
744 | ||
59ea14cd PE |
745 | Empty all rows in MATRIX by clearing their enabled_p flags. |
746 | The function prepare_desired_row will eventually really clear a row | |
747 | when it sees one with a false enabled_p flag. | |
5f5c8ee5 | 748 | |
59ea14cd | 749 | Reset update hints to default values. The only update hint |
5f5c8ee5 GM |
750 | currently present is the flag MATRIX->no_scrolling_p. */ |
751 | ||
752 | void | |
971de7fb | 753 | clear_glyph_matrix (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
754 | { |
755 | if (matrix) | |
756 | { | |
59ea14cd | 757 | clear_glyph_matrix_rows (matrix, 0, matrix->nrows); |
5f5c8ee5 GM |
758 | matrix->no_scrolling_p = 0; |
759 | } | |
760 | } | |
177c0ea7 | 761 | |
5f5c8ee5 GM |
762 | |
763 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
764 | Increment y-positions in glyph rows between START and END by DY, | |
765 | and recompute their visible height. */ | |
766 | ||
767 | void | |
971de7fb | 768 | shift_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int start, int end, int dy) |
5f5c8ee5 GM |
769 | { |
770 | int min_y, max_y; | |
177c0ea7 | 771 | |
a54e2c05 DA |
772 | eassert (start <= end); |
773 | eassert (start >= 0 && start < matrix->nrows); | |
774 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 775 | |
7df02016 KS |
776 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
777 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 778 | |
5f5c8ee5 GM |
779 | for (; start < end; ++start) |
780 | { | |
781 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 782 | |
5f5c8ee5 | 783 | row->y += dy; |
d6c747a4 | 784 | row->visible_height = row->height; |
177c0ea7 | 785 | |
5f5c8ee5 | 786 | if (row->y < min_y) |
d6c747a4 GM |
787 | row->visible_height -= min_y - row->y; |
788 | if (row->y + row->height > max_y) | |
789 | row->visible_height -= row->y + row->height - max_y; | |
e61124cd YM |
790 | if (row->fringe_bitmap_periodic_p) |
791 | row->redraw_fringe_bitmaps_p = 1; | |
5f5c8ee5 GM |
792 | } |
793 | } | |
794 | ||
795 | ||
796 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
797 | invalid is done by setting enabled_p to zero for all rows in a | |
798 | current matrix. */ | |
799 | ||
800 | void | |
971de7fb | 801 | clear_current_matrices (register struct frame *f) |
5f5c8ee5 GM |
802 | { |
803 | /* Clear frame current matrix, if we have one. */ | |
804 | if (f->current_matrix) | |
805 | clear_glyph_matrix (f->current_matrix); | |
806 | ||
5a49b79c | 807 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
808 | /* Clear the matrix of the menu bar window, if such a window exists. |
809 | The menu bar window is currently used to display menus on X when | |
810 | no toolkit support is compiled in. */ | |
e69b0960 DA |
811 | if (WINDOWP (f->menu_bar_window)) |
812 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
5a49b79c | 813 | #endif |
5f5c8ee5 | 814 | |
9ea173e8 | 815 | /* Clear the matrix of the tool-bar window, if any. */ |
e69b0960 DA |
816 | if (WINDOWP (f->tool_bar_window)) |
817 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
5f5c8ee5 GM |
818 | |
819 | /* Clear current window matrices. */ | |
a54e2c05 | 820 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
821 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); |
822 | } | |
823 | ||
824 | ||
825 | /* Clear out all display lines of F for a coming redisplay. */ | |
826 | ||
827 | void | |
971de7fb | 828 | clear_desired_matrices (register struct frame *f) |
5f5c8ee5 GM |
829 | { |
830 | if (f->desired_matrix) | |
831 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 832 | |
5a49b79c | 833 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
e69b0960 DA |
834 | if (WINDOWP (f->menu_bar_window)) |
835 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
5a49b79c | 836 | #endif |
5f5c8ee5 | 837 | |
e69b0960 DA |
838 | if (WINDOWP (f->tool_bar_window)) |
839 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
5f5c8ee5 GM |
840 | |
841 | /* Do it for window matrices. */ | |
a54e2c05 | 842 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
843 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); |
844 | } | |
845 | ||
846 | ||
59ea14cd PE |
847 | /* Clear matrices in window tree rooted in W. If DESIRED_P, |
848 | clear desired matrices, otherwise clear current matrices. */ | |
5f5c8ee5 GM |
849 | |
850 | static void | |
59ea14cd | 851 | clear_window_matrices (struct window *w, bool desired_p) |
5f5c8ee5 GM |
852 | { |
853 | while (w) | |
854 | { | |
e74aeda8 DA |
855 | if (WINDOWP (w->contents)) |
856 | clear_window_matrices (XWINDOW (w->contents), desired_p); | |
5f5c8ee5 GM |
857 | else |
858 | { | |
859 | if (desired_p) | |
860 | clear_glyph_matrix (w->desired_matrix); | |
861 | else | |
862 | { | |
863 | clear_glyph_matrix (w->current_matrix); | |
9d93ce29 | 864 | w->window_end_valid = 0; |
5f5c8ee5 GM |
865 | } |
866 | } | |
867 | ||
d3d50620 | 868 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
869 | } |
870 | } | |
871 | ||
872 | ||
873 | \f | |
874 | /*********************************************************************** | |
875 | Glyph Rows | |
876 | ||
877 | See dispextern.h for an overall explanation of glyph rows. | |
878 | ***********************************************************************/ | |
879 | ||
880 | /* Clear glyph row ROW. Do it in a way that makes it robust against | |
881 | changes in the glyph_row structure, i.e. addition or removal of | |
882 | structure members. */ | |
883 | ||
2cca872d KH |
884 | static struct glyph_row null_row; |
885 | ||
5f5c8ee5 | 886 | void |
971de7fb | 887 | clear_glyph_row (struct glyph_row *row) |
5f5c8ee5 GM |
888 | { |
889 | struct glyph *p[1 + LAST_AREA]; | |
5f5c8ee5 GM |
890 | |
891 | /* Save pointers. */ | |
892 | p[LEFT_MARGIN_AREA] = row->glyphs[LEFT_MARGIN_AREA]; | |
893 | p[TEXT_AREA] = row->glyphs[TEXT_AREA]; | |
894 | p[RIGHT_MARGIN_AREA] = row->glyphs[RIGHT_MARGIN_AREA]; | |
895 | p[LAST_AREA] = row->glyphs[LAST_AREA]; | |
896 | ||
897 | /* Clear. */ | |
898 | *row = null_row; | |
899 | ||
900 | /* Restore pointers. */ | |
901 | row->glyphs[LEFT_MARGIN_AREA] = p[LEFT_MARGIN_AREA]; | |
902 | row->glyphs[TEXT_AREA] = p[TEXT_AREA]; | |
903 | row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA]; | |
904 | row->glyphs[LAST_AREA] = p[LAST_AREA]; | |
45560b1a GM |
905 | |
906 | #if 0 /* At some point, some bit-fields of struct glyph were not set, | |
907 | which made glyphs unequal when compared with GLYPH_EQUAL_P. | |
908 | Redisplay outputs such glyphs, and flickering effects were | |
909 | the result. This also depended on the contents of memory | |
910 | returned by xmalloc. If flickering happens again, activate | |
153a073c | 911 | the code below. If the flickering is gone with that, chances |
45560b1a | 912 | are that the flickering has the same reason as here. */ |
72af86bd | 913 | memset (p[0], 0, (char *) p[LAST_AREA] - (char *) p[0]); |
45560b1a | 914 | #endif |
5f5c8ee5 GM |
915 | } |
916 | ||
917 | ||
918 | /* Make ROW an empty, enabled row of canonical character height, | |
919 | in window W starting at y-position Y. */ | |
920 | ||
921 | void | |
971de7fb | 922 | blank_row (struct window *w, struct glyph_row *row, int y) |
5f5c8ee5 GM |
923 | { |
924 | int min_y, max_y; | |
177c0ea7 | 925 | |
7df02016 KS |
926 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
927 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 928 | |
5f5c8ee5 GM |
929 | clear_glyph_row (row); |
930 | row->y = y; | |
408f5064 | 931 | row->ascent = row->phys_ascent = 0; |
d3d50620 | 932 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 933 | row->visible_height = row->height; |
177c0ea7 | 934 | |
5f5c8ee5 | 935 | if (row->y < min_y) |
d6c747a4 GM |
936 | row->visible_height -= min_y - row->y; |
937 | if (row->y + row->height > max_y) | |
938 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
939 | |
940 | row->enabled_p = 1; | |
941 | } | |
942 | ||
943 | ||
944 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
945 | are the amounts by which to change positions. Note that the first | |
946 | glyph of the text area of a row can have a buffer position even if | |
947 | the used count of the text area is zero. Such rows display line | |
948 | ends. */ | |
949 | ||
5bf46f05 | 950 | static void |
ace1712c | 951 | increment_row_positions (struct glyph_row *row, |
d311d28c | 952 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
953 | { |
954 | int area, i; | |
955 | ||
956 | /* Increment start and end positions. */ | |
957 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
958 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
959 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
960 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
d36fe237 EZ |
961 | CHARPOS (row->start.pos) += delta; |
962 | BYTEPOS (row->start.pos) += delta_bytes; | |
963 | CHARPOS (row->end.pos) += delta; | |
964 | BYTEPOS (row->end.pos) += delta_bytes; | |
5f5c8ee5 | 965 | |
5cacdcfd KS |
966 | if (!row->enabled_p) |
967 | return; | |
968 | ||
5f5c8ee5 GM |
969 | /* Increment positions in glyphs. */ |
970 | for (area = 0; area < LAST_AREA; ++area) | |
971 | for (i = 0; i < row->used[area]; ++i) | |
972 | if (BUFFERP (row->glyphs[area][i].object) | |
973 | && row->glyphs[area][i].charpos > 0) | |
974 | row->glyphs[area][i].charpos += delta; | |
975 | ||
976 | /* Capture the case of rows displaying a line end. */ | |
977 | if (row->used[TEXT_AREA] == 0 | |
978 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
979 | row->glyphs[TEXT_AREA]->charpos += delta; | |
980 | } | |
981 | ||
982 | ||
9af3e742 | 983 | #if 0 |
5f5c8ee5 GM |
984 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
985 | contents, i.e. glyph structure contents are exchanged between A and | |
986 | B without changing glyph pointers in A and B. */ | |
987 | ||
988 | static void | |
1dae0f0a | 989 | swap_glyphs_in_rows (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
990 | { |
991 | int area; | |
992 | ||
993 | for (area = 0; area < LAST_AREA; ++area) | |
994 | { | |
995 | /* Number of glyphs to swap. */ | |
996 | int max_used = max (a->used[area], b->used[area]); | |
997 | ||
998 | /* Start of glyphs in area of row A. */ | |
999 | struct glyph *glyph_a = a->glyphs[area]; | |
1000 | ||
1001 | /* End + 1 of glyphs in area of row A. */ | |
1002 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
1003 | ||
1004 | /* Start of glyphs in area of row B. */ | |
1005 | struct glyph *glyph_b = b->glyphs[area]; | |
1006 | ||
1007 | while (glyph_a < glyph_a_end) | |
1008 | { | |
1009 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
1010 | initialization. */ | |
1011 | struct glyph temp; | |
1012 | temp = *glyph_a; | |
1013 | *glyph_a = *glyph_b; | |
1014 | *glyph_b = temp; | |
1015 | ++glyph_a; | |
1016 | ++glyph_b; | |
1017 | } | |
1018 | } | |
1019 | } | |
1020 | ||
9af3e742 | 1021 | #endif /* 0 */ |
5f5c8ee5 | 1022 | |
015137db EZ |
1023 | /* Exchange pointers to glyph memory between glyph rows A and B. Also |
1024 | exchange the used[] array and the hash values of the rows, because | |
1025 | these should all go together for the row's hash value to be | |
1026 | correct. */ | |
5f5c8ee5 | 1027 | |
b0ab8123 | 1028 | static void |
971de7fb | 1029 | swap_glyph_pointers (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1030 | { |
1031 | int i; | |
015137db EZ |
1032 | unsigned hash_tem = a->hash; |
1033 | ||
5f5c8ee5 GM |
1034 | for (i = 0; i < LAST_AREA + 1; ++i) |
1035 | { | |
1036 | struct glyph *temp = a->glyphs[i]; | |
015137db | 1037 | |
5f5c8ee5 GM |
1038 | a->glyphs[i] = b->glyphs[i]; |
1039 | b->glyphs[i] = temp; | |
73055685 EZ |
1040 | if (i < LAST_AREA) |
1041 | { | |
1042 | short used_tem = a->used[i]; | |
1043 | ||
1044 | a->used[i] = b->used[i]; | |
1045 | b->used[i] = used_tem; | |
1046 | } | |
5f5c8ee5 | 1047 | } |
015137db EZ |
1048 | a->hash = b->hash; |
1049 | b->hash = hash_tem; | |
5f5c8ee5 GM |
1050 | } |
1051 | ||
1052 | ||
1053 | /* Copy glyph row structure FROM to glyph row structure TO, except | |
015137db EZ |
1054 | that glyph pointers, the `used' counts, and the hash values in the |
1055 | structures are left unchanged. */ | |
5f5c8ee5 | 1056 | |
b0ab8123 | 1057 | static void |
971de7fb | 1058 | copy_row_except_pointers (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1059 | { |
1060 | struct glyph *pointers[1 + LAST_AREA]; | |
73055685 | 1061 | short used[LAST_AREA]; |
015137db | 1062 | unsigned hashval; |
5f5c8ee5 GM |
1063 | |
1064 | /* Save glyph pointers of TO. */ | |
72af86bd | 1065 | memcpy (pointers, to->glyphs, sizeof to->glyphs); |
015137db EZ |
1066 | memcpy (used, to->used, sizeof to->used); |
1067 | hashval = to->hash; | |
5f5c8ee5 GM |
1068 | |
1069 | /* Do a structure assignment. */ | |
1070 | *to = *from; | |
1071 | ||
1072 | /* Restore original pointers of TO. */ | |
72af86bd | 1073 | memcpy (to->glyphs, pointers, sizeof to->glyphs); |
015137db EZ |
1074 | memcpy (to->used, used, sizeof to->used); |
1075 | to->hash = hashval; | |
5f5c8ee5 GM |
1076 | } |
1077 | ||
1078 | ||
5f5c8ee5 GM |
1079 | /* Assign glyph row FROM to glyph row TO. This works like a structure |
1080 | assignment TO = FROM, except that glyph pointers are not copied but | |
1081 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1082 | a memory leak. */ | |
1083 | ||
b0ab8123 | 1084 | static void |
971de7fb | 1085 | assign_row (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1086 | { |
1087 | swap_glyph_pointers (to, from); | |
1088 | copy_row_except_pointers (to, from); | |
1089 | } | |
1090 | ||
1091 | ||
1092 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1093 | a row in a window matrix, is a slice of the glyph memory of the | |
1094 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
59ea14cd | 1095 | is true if the glyph memory of WINDOW_ROW is part of the glyph |
5f5c8ee5 GM |
1096 | memory of FRAME_ROW. */ |
1097 | ||
e509cfa6 | 1098 | #ifdef GLYPH_DEBUG |
9339e87f | 1099 | |
59ea14cd | 1100 | static bool |
59fc5cf9 | 1101 | glyph_row_slice_p (struct glyph_row *window_row, struct glyph_row *frame_row) |
5f5c8ee5 GM |
1102 | { |
1103 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1104 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1105 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1106 | ||
1107 | return (frame_glyph_start <= window_glyph_start | |
1108 | && window_glyph_start < frame_glyph_end); | |
1109 | } | |
1110 | ||
9339e87f | 1111 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1112 | |
9af3e742 GM |
1113 | #if 0 |
1114 | ||
5f5c8ee5 GM |
1115 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1116 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1117 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1118 | ||
1119 | static struct glyph_row * | |
59fc5cf9 AS |
1120 | find_glyph_row_slice (struct glyph_matrix *window_matrix, |
1121 | struct glyph_matrix *frame_matrix, int row) | |
5f5c8ee5 GM |
1122 | { |
1123 | int i; | |
1124 | ||
a54e2c05 | 1125 | eassert (row >= 0 && row < frame_matrix->nrows); |
5f5c8ee5 GM |
1126 | |
1127 | for (i = 0; i < window_matrix->nrows; ++i) | |
1128 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1129 | frame_matrix->rows + row)) | |
1130 | break; | |
1131 | ||
1132 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1133 | } | |
1134 | ||
9af3e742 | 1135 | #endif /* 0 */ |
5f5c8ee5 GM |
1136 | |
1137 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1138 | i.e. they are only marked as to be cleared by setting their | |
1139 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1140 | call to this function really clears it. */ | |
1141 | ||
1142 | void | |
971de7fb | 1143 | prepare_desired_row (struct glyph_row *row) |
5f5c8ee5 GM |
1144 | { |
1145 | if (!row->enabled_p) | |
1146 | { | |
59ea14cd | 1147 | bool rp = row->reversed_p; |
5009f85e | 1148 | |
5f5c8ee5 GM |
1149 | clear_glyph_row (row); |
1150 | row->enabled_p = 1; | |
5009f85e | 1151 | row->reversed_p = rp; |
5f5c8ee5 GM |
1152 | } |
1153 | } | |
1154 | ||
1155 | ||
1156 | /* Return a hash code for glyph row ROW. */ | |
1157 | ||
2f7c71a1 | 1158 | static int |
971de7fb | 1159 | line_hash_code (struct glyph_row *row) |
5f5c8ee5 GM |
1160 | { |
1161 | int hash = 0; | |
177c0ea7 | 1162 | |
5f5c8ee5 GM |
1163 | if (row->enabled_p) |
1164 | { | |
4cecaab8 MB |
1165 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1166 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1167 | ||
1168 | while (glyph < end) | |
1169 | { | |
1170 | int c = glyph->u.ch; | |
1171 | int face_id = glyph->face_id; | |
daf01701 | 1172 | if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
4cecaab8 MB |
1173 | c -= SPACEGLYPH; |
1174 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1175 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1176 | ++glyph; | |
1177 | } | |
5f5c8ee5 | 1178 | |
4cecaab8 MB |
1179 | if (hash == 0) |
1180 | hash = 1; | |
5f5c8ee5 GM |
1181 | } |
1182 | ||
1183 | return hash; | |
1184 | } | |
1185 | ||
1186 | ||
153a073c | 1187 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1188 | the number of characters in the line. If must_write_spaces is |
1189 | zero, leading and trailing spaces are ignored. */ | |
1190 | ||
dfd153ae | 1191 | static int |
971de7fb | 1192 | line_draw_cost (struct glyph_matrix *matrix, int vpos) |
5f5c8ee5 GM |
1193 | { |
1194 | struct glyph_row *row = matrix->rows + vpos; | |
1195 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1196 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1197 | int len; | |
1198 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
ca9ce8f2 | 1199 | ptrdiff_t glyph_table_len = GLYPH_TABLE_LENGTH; |
5f5c8ee5 GM |
1200 | |
1201 | /* Ignore trailing and leading spaces if we can. */ | |
daf01701 | 1202 | if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
5f5c8ee5 GM |
1203 | { |
1204 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1205 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1206 | --end; |
1207 | ||
177c0ea7 | 1208 | /* All blank line. */ |
5f5c8ee5 GM |
1209 | if (end == beg) |
1210 | return 0; | |
1211 | ||
1212 | /* Skip over leading spaces. */ | |
1213 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1214 | ++beg; | |
1215 | } | |
1216 | ||
1217 | /* If we don't have a glyph-table, each glyph is one character, | |
1218 | so return the number of glyphs. */ | |
1219 | if (glyph_table_base == 0) | |
1220 | len = end - beg; | |
1221 | else | |
1222 | { | |
1223 | /* Otherwise, scan the glyphs and accumulate their total length | |
1224 | in LEN. */ | |
1225 | len = 0; | |
1226 | while (beg < end) | |
1227 | { | |
3fc809e2 | 1228 | GLYPH g; |
177c0ea7 | 1229 | |
3fc809e2 KS |
1230 | SET_GLYPH_FROM_CHAR_GLYPH (g, *beg); |
1231 | ||
565b39a8 | 1232 | if (GLYPH_INVALID_P (g) |
42186983 | 1233 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) |
5f5c8ee5 GM |
1234 | len += 1; |
1235 | else | |
1236 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1237 | |
5f5c8ee5 GM |
1238 | ++beg; |
1239 | } | |
1240 | } | |
177c0ea7 | 1241 | |
5f5c8ee5 GM |
1242 | return len; |
1243 | } | |
1244 | ||
1245 | ||
59ea14cd PE |
1246 | /* Return true if the glyph rows A and B have equal contents. |
1247 | MOUSE_FACE_P means compare the mouse_face_p flags of A and B, too. */ | |
5f5c8ee5 | 1248 | |
b0ab8123 | 1249 | static bool |
59ea14cd | 1250 | row_equal_p (struct glyph_row *a, struct glyph_row *b, bool mouse_face_p) |
5f5c8ee5 | 1251 | { |
a54e2c05 DA |
1252 | eassert (verify_row_hash (a)); |
1253 | eassert (verify_row_hash (b)); | |
7a7270dd | 1254 | |
5f5c8ee5 GM |
1255 | if (a == b) |
1256 | return 1; | |
1257 | else if (a->hash != b->hash) | |
1258 | return 0; | |
1259 | else | |
1260 | { | |
1261 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1262 | int area; | |
1263 | ||
e4e0bee9 GM |
1264 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1265 | return 0; | |
1266 | ||
5f5c8ee5 GM |
1267 | /* Compare glyphs. */ |
1268 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1269 | { | |
1270 | if (a->used[area] != b->used[area]) | |
1271 | return 0; | |
177c0ea7 | 1272 | |
5f5c8ee5 GM |
1273 | a_glyph = a->glyphs[area]; |
1274 | a_end = a_glyph + a->used[area]; | |
1275 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1276 | |
5f5c8ee5 GM |
1277 | while (a_glyph < a_end |
1278 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1279 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1280 | |
5f5c8ee5 GM |
1281 | if (a_glyph != a_end) |
1282 | return 0; | |
1283 | } | |
1284 | ||
6b61353c KH |
1285 | if (a->fill_line_p != b->fill_line_p |
1286 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1287 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
1288 | || a->left_fringe_face_id != b->left_fringe_face_id | |
e61124cd | 1289 | || a->left_fringe_offset != b->left_fringe_offset |
6b61353c KH |
1290 | || a->right_fringe_bitmap != b->right_fringe_bitmap |
1291 | || a->right_fringe_face_id != b->right_fringe_face_id | |
e61124cd YM |
1292 | || a->right_fringe_offset != b->right_fringe_offset |
1293 | || a->fringe_bitmap_periodic_p != b->fringe_bitmap_periodic_p | |
3d4a365f | 1294 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
6b61353c | 1295 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1296 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1297 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1298 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
918f4159 | 1299 | || a->reversed_p != b->reversed_p |
5f5c8ee5 GM |
1300 | /* Different partially visible characters on left margin. */ |
1301 | || a->x != b->x | |
1302 | /* Different height. */ | |
1303 | || a->ascent != b->ascent | |
408f5064 GM |
1304 | || a->phys_ascent != b->phys_ascent |
1305 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1306 | || a->visible_height != b->visible_height) |
1307 | return 0; | |
1308 | } | |
1309 | ||
1310 | return 1; | |
1311 | } | |
1312 | ||
1313 | ||
1314 | \f | |
1315 | /*********************************************************************** | |
1316 | Glyph Pool | |
1317 | ||
1318 | See dispextern.h for an overall explanation of glyph pools. | |
1319 | ***********************************************************************/ | |
1320 | ||
f0b79313 DA |
1321 | /* Allocate a glyph_pool structure. The structure returned is initialized |
1322 | with zeros. If GLYPH_DEBUG and ENABLE_CHECKING are in effect, the global | |
1323 | variable glyph_pool_count is incremented for each pool allocated. */ | |
5f5c8ee5 GM |
1324 | |
1325 | static struct glyph_pool * | |
971de7fb | 1326 | new_glyph_pool (void) |
5f5c8ee5 | 1327 | { |
23f86fce | 1328 | struct glyph_pool *result = xzalloc (sizeof *result); |
177c0ea7 | 1329 | |
f0b79313 | 1330 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
5f5c8ee5 GM |
1331 | /* For memory leak and double deletion checking. */ |
1332 | ++glyph_pool_count; | |
f0b79313 | 1333 | #endif |
177c0ea7 | 1334 | |
5f5c8ee5 GM |
1335 | return result; |
1336 | } | |
1337 | ||
1338 | ||
1339 | /* Free a glyph_pool structure POOL. The function may be called with | |
f0b79313 DA |
1340 | a null POOL pointer. If GLYPH_DEBUG and ENABLE_CHECKING are in effect, |
1341 | global variable glyph_pool_count is decremented with every pool structure | |
1342 | freed. If this count gets negative, more structures were freed than | |
1343 | allocated, i.e. one structure must have been freed more than once or | |
1344 | a bogus pointer was passed to free_glyph_pool. */ | |
5f5c8ee5 GM |
1345 | |
1346 | static void | |
971de7fb | 1347 | free_glyph_pool (struct glyph_pool *pool) |
5f5c8ee5 GM |
1348 | { |
1349 | if (pool) | |
1350 | { | |
f0b79313 | 1351 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
153a073c | 1352 | /* More freed than allocated? */ |
5f5c8ee5 | 1353 | --glyph_pool_count; |
a54e2c05 | 1354 | eassert (glyph_pool_count >= 0); |
f0b79313 | 1355 | #endif |
5f5c8ee5 GM |
1356 | xfree (pool->glyphs); |
1357 | xfree (pool); | |
1358 | } | |
1359 | } | |
1360 | ||
1361 | ||
1362 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1363 | columns we need. This function never shrinks a pool. The only | |
1364 | case in which this would make sense, would be when a frame's size | |
1365 | is changed from a large value to a smaller one. But, if someone | |
1366 | does it once, we can expect that he will do it again. | |
1367 | ||
59ea14cd | 1368 | Return true if the pool changed in a way which makes |
5f5c8ee5 GM |
1369 | re-adjusting window glyph matrices necessary. */ |
1370 | ||
59ea14cd | 1371 | static bool |
971de7fb | 1372 | realloc_glyph_pool (struct glyph_pool *pool, struct dim matrix_dim) |
5f5c8ee5 | 1373 | { |
ca9ce8f2 | 1374 | ptrdiff_t needed; |
59ea14cd | 1375 | bool changed_p; |
5f5c8ee5 GM |
1376 | |
1377 | changed_p = (pool->glyphs == 0 | |
1378 | || matrix_dim.height != pool->nrows | |
1379 | || matrix_dim.width != pool->ncolumns); | |
1380 | ||
1381 | /* Enlarge the glyph pool. */ | |
ca9ce8f2 | 1382 | needed = matrix_dim.width; |
0065d054 PE |
1383 | if (INT_MULTIPLY_OVERFLOW (needed, matrix_dim.height)) |
1384 | memory_full (SIZE_MAX); | |
ca9ce8f2 | 1385 | needed *= matrix_dim.height; |
5f5c8ee5 GM |
1386 | if (needed > pool->nglyphs) |
1387 | { | |
0065d054 PE |
1388 | ptrdiff_t old_nglyphs = pool->nglyphs; |
1389 | pool->glyphs = xpalloc (pool->glyphs, &pool->nglyphs, | |
1390 | needed - old_nglyphs, -1, sizeof *pool->glyphs); | |
1391 | memset (pool->glyphs + old_nglyphs, 0, | |
1392 | (pool->nglyphs - old_nglyphs) * sizeof *pool->glyphs); | |
5f5c8ee5 GM |
1393 | } |
1394 | ||
153a073c | 1395 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1396 | to do sanity checks, and (b) the number of columns determines |
1397 | where rows in the frame matrix start---this must be available to | |
1398 | determine pointers to rows of window sub-matrices. */ | |
1399 | pool->nrows = matrix_dim.height; | |
1400 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1401 | |
5f5c8ee5 GM |
1402 | return changed_p; |
1403 | } | |
1404 | ||
1405 | ||
1406 | \f | |
1407 | /*********************************************************************** | |
1408 | Debug Code | |
1409 | ***********************************************************************/ | |
1410 | ||
e509cfa6 | 1411 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 1412 | |
a13396c9 | 1413 | |
28d440ab KL |
1414 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1415 | XXX Maybe this should be changed to flush the current terminal instead of | |
1416 | stdout. | |
1417 | */ | |
a13396c9 | 1418 | |
85fece3e PE |
1419 | void flush_stdout (void) EXTERNALLY_VISIBLE; |
1420 | ||
a13396c9 | 1421 | void |
59fc5cf9 | 1422 | flush_stdout (void) |
a13396c9 GM |
1423 | { |
1424 | fflush (stdout); | |
1425 | } | |
1426 | ||
1427 | ||
5f5c8ee5 GM |
1428 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1429 | pointer has been lost, e.g. by using a structure assignment between | |
1430 | rows, at least one pointer must occur more than once in the rows of | |
1431 | MATRIX. */ | |
1432 | ||
1433 | void | |
59fc5cf9 | 1434 | check_matrix_pointer_lossage (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
1435 | { |
1436 | int i, j; | |
177c0ea7 | 1437 | |
5f5c8ee5 GM |
1438 | for (i = 0; i < matrix->nrows; ++i) |
1439 | for (j = 0; j < matrix->nrows; ++j) | |
a54e2c05 | 1440 | eassert (i == j |
5f5c8ee5 GM |
1441 | || (matrix->rows[i].glyphs[TEXT_AREA] |
1442 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1443 | } | |
1444 | ||
1445 | ||
1446 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1447 | ||
1448 | struct glyph_row * | |
59fc5cf9 | 1449 | matrix_row (struct glyph_matrix *matrix, int row) |
5f5c8ee5 | 1450 | { |
a54e2c05 DA |
1451 | eassert (matrix && matrix->rows); |
1452 | eassert (row >= 0 && row < matrix->nrows); | |
5f5c8ee5 GM |
1453 | |
1454 | /* That's really too slow for normal testing because this function | |
1455 | is called almost everywhere. Although---it's still astonishingly | |
1456 | fast, so it is valuable to have for debugging purposes. */ | |
1457 | #if 0 | |
1458 | check_matrix_pointer_lossage (matrix); | |
1459 | #endif | |
177c0ea7 | 1460 | |
5f5c8ee5 GM |
1461 | return matrix->rows + row; |
1462 | } | |
1463 | ||
1464 | ||
1465 | #if 0 /* This function makes invalid assumptions when text is | |
1466 | partially invisible. But it might come handy for debugging | |
1467 | nevertheless. */ | |
1468 | ||
1469 | /* Check invariants that must hold for an up to date current matrix of | |
1470 | window W. */ | |
1471 | ||
1472 | static void | |
59fc5cf9 | 1473 | check_matrix_invariants (struct window *w) |
5f5c8ee5 GM |
1474 | { |
1475 | struct glyph_matrix *matrix = w->current_matrix; | |
1476 | int yb = window_text_bottom_y (w); | |
1477 | struct glyph_row *row = matrix->rows; | |
1478 | struct glyph_row *last_text_row = NULL; | |
1479 | struct buffer *saved = current_buffer; | |
e74aeda8 | 1480 | struct buffer *buffer = XBUFFER (w->contents); |
5f5c8ee5 | 1481 | int c; |
177c0ea7 | 1482 | |
5f5c8ee5 GM |
1483 | /* This can sometimes happen for a fresh window. */ |
1484 | if (matrix->nrows < 2) | |
1485 | return; | |
1486 | ||
1487 | set_buffer_temp (buffer); | |
1488 | ||
1489 | /* Note: last row is always reserved for the mode line. */ | |
1490 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1491 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1492 | { | |
1493 | struct glyph_row *next = row + 1; | |
1494 | ||
1495 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1496 | last_text_row = row; | |
1497 | ||
1498 | /* Check that character and byte positions are in sync. */ | |
a54e2c05 | 1499 | eassert (MATRIX_ROW_START_BYTEPOS (row) |
5f5c8ee5 | 1500 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); |
a54e2c05 | 1501 | eassert (BYTEPOS (row->start.pos) |
d36fe237 | 1502 | == CHAR_TO_BYTE (CHARPOS (row->start.pos))); |
5f5c8ee5 GM |
1503 | |
1504 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1505 | have such a position temporarily in case of a minibuffer | |
1506 | displaying something like `[Sole completion]' at its end. */ | |
1507 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
d36fe237 | 1508 | { |
a54e2c05 | 1509 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
d36fe237 | 1510 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); |
a54e2c05 | 1511 | eassert (BYTEPOS (row->end.pos) |
d36fe237 EZ |
1512 | == CHAR_TO_BYTE (CHARPOS (row->end.pos))); |
1513 | } | |
5f5c8ee5 GM |
1514 | |
1515 | /* Check that end position of `row' is equal to start position | |
1516 | of next row. */ | |
1517 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1518 | { | |
a54e2c05 | 1519 | eassert (MATRIX_ROW_END_CHARPOS (row) |
5f5c8ee5 | 1520 | == MATRIX_ROW_START_CHARPOS (next)); |
a54e2c05 | 1521 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
5f5c8ee5 | 1522 | == MATRIX_ROW_START_BYTEPOS (next)); |
a54e2c05 DA |
1523 | eassert (CHARPOS (row->end.pos) == CHARPOS (next->start.pos)); |
1524 | eassert (BYTEPOS (row->end.pos) == BYTEPOS (next->start.pos)); | |
5f5c8ee5 GM |
1525 | } |
1526 | row = next; | |
1527 | } | |
1528 | ||
a54e2c05 DA |
1529 | eassert (w->current_matrix->nrows == w->desired_matrix->nrows); |
1530 | eassert (w->desired_matrix->rows != NULL); | |
5f5c8ee5 GM |
1531 | set_buffer_temp (saved); |
1532 | } | |
1533 | ||
1534 | #endif /* 0 */ | |
1535 | ||
e509cfa6 | 1536 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
1537 | |
1538 | ||
1539 | \f | |
1540 | /********************************************************************** | |
1541 | Allocating/ Adjusting Glyph Matrices | |
1542 | **********************************************************************/ | |
1543 | ||
1544 | /* Allocate glyph matrices over a window tree for a frame-based | |
1545 | redisplay | |
1546 | ||
1547 | X and Y are column/row within the frame glyph matrix where | |
1548 | sub-matrices for the window tree rooted at WINDOW must be | |
59ea14cd | 1549 | allocated. DIM_ONLY_P means that the caller of this |
8ce2650d YM |
1550 | function is only interested in the result matrix dimension, and |
1551 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1552 | |
1553 | The function returns the total width/height of the sub-matrices of | |
1554 | the window tree. If called on a frame root window, the computation | |
1555 | will take the mini-buffer window into account. | |
1556 | ||
1557 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1558 | ||
1559 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1560 | glyph matrices yet, and | |
1561 | ||
1562 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1563 | any window in the tree will be changed or have been changed (see | |
153a073c | 1564 | DIM_ONLY_P) |
5f5c8ee5 GM |
1565 | |
1566 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1567 | function. | |
1568 | ||
1569 | Windows are arranged into chains of windows on the same level | |
1570 | through the next fields of window structures. Such a level can be | |
1571 | either a sequence of horizontally adjacent windows from left to | |
1572 | right, or a sequence of vertically adjacent windows from top to | |
1573 | bottom. Each window in a horizontal sequence can be either a leaf | |
1574 | window or a vertical sequence; a window in a vertical sequence can | |
1575 | be either a leaf or a horizontal sequence. All windows in a | |
1576 | horizontal sequence have the same height, and all windows in a | |
1577 | vertical sequence have the same width. | |
1578 | ||
1579 | This function uses, for historical reasons, a more general | |
1580 | algorithm to determine glyph matrix dimensions that would be | |
1581 | necessary. | |
1582 | ||
1583 | The matrix height of a horizontal sequence is determined by the | |
1584 | maximum height of any matrix in the sequence. The matrix width of | |
1585 | a horizontal sequence is computed by adding up matrix widths of | |
1586 | windows in the sequence. | |
1587 | ||
1588 | |<------- result width ------->| | |
1589 | +---------+----------+---------+ --- | |
1590 | | | | | | | |
1591 | | | | | | |
1592 | +---------+ | | result height | |
1593 | | +---------+ | |
1594 | | | | | |
1595 | +----------+ --- | |
1596 | ||
1597 | The matrix width of a vertical sequence is the maximum matrix width | |
1598 | of any window in the sequence. Its height is computed by adding up | |
1599 | matrix heights of windows in the sequence. | |
1600 | ||
1601 | |<---- result width -->| | |
1602 | +---------+ --- | |
1603 | | | | | |
1604 | | | | | |
1605 | +---------+--+ | | |
1606 | | | | | |
1607 | | | result height | |
1608 | | | | |
1609 | +------------+---------+ | | |
1610 | | | | | |
1611 | | | | | |
1612 | +------------+---------+ --- */ | |
1613 | ||
1614 | /* Bit indicating that a new matrix will be allocated or has been | |
1615 | allocated. */ | |
1616 | ||
1617 | #define NEW_LEAF_MATRIX (1 << 0) | |
1618 | ||
1619 | /* Bit indicating that a matrix will or has changed its location or | |
1620 | size. */ | |
1621 | ||
1622 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1623 | ||
1624 | static struct dim | |
6f704c76 | 1625 | allocate_matrices_for_frame_redisplay (Lisp_Object window, int x, int y, |
59ea14cd | 1626 | bool dim_only_p, int *window_change_flags) |
5f5c8ee5 GM |
1627 | { |
1628 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1629 | int x0 = x, y0 = y; | |
1630 | int wmax = 0, hmax = 0; | |
1631 | struct dim total; | |
1632 | struct dim dim; | |
1633 | struct window *w; | |
59ea14cd | 1634 | bool in_horz_combination_p; |
5f5c8ee5 GM |
1635 | |
1636 | /* What combination is WINDOW part of? Compute this once since the | |
1637 | result is the same for all windows in the `next' chain. The | |
1638 | special case of a root window (parent equal to nil) is treated | |
1639 | like a vertical combination because a root window's `next' | |
1640 | points to the mini-buffer window, if any, which is arranged | |
1641 | vertically below other windows. */ | |
1642 | in_horz_combination_p | |
d3d50620 | 1643 | = (!NILP (XWINDOW (window)->parent) |
e74aeda8 | 1644 | && WINDOW_HORIZONTAL_COMBINATION_P (XWINDOW (XWINDOW (window)->parent))); |
5f5c8ee5 GM |
1645 | |
1646 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1647 | do |
5f5c8ee5 GM |
1648 | { |
1649 | w = XWINDOW (window); | |
1650 | ||
1651 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1652 | on whether this is a combination or a leaf window. */ |
e74aeda8 DA |
1653 | if (WINDOWP (w->contents)) |
1654 | dim = allocate_matrices_for_frame_redisplay (w->contents, x, y, | |
5f5c8ee5 GM |
1655 | dim_only_p, |
1656 | window_change_flags); | |
1657 | else | |
1658 | { | |
1659 | /* If not already done, allocate sub-matrix structures. */ | |
1660 | if (w->desired_matrix == NULL) | |
1661 | { | |
1662 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1663 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1664 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1665 | } | |
177c0ea7 | 1666 | |
5f5c8ee5 GM |
1667 | /* Width and height MUST be chosen so that there are no |
1668 | holes in the frame matrix. */ | |
5d3cc43c GM |
1669 | dim.width = required_matrix_width (w); |
1670 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1671 | |
1672 | /* Will matrix be re-allocated? */ | |
1673 | if (x != w->desired_matrix->matrix_x | |
1674 | || y != w->desired_matrix->matrix_y | |
1675 | || dim.width != w->desired_matrix->matrix_w | |
1676 | || dim.height != w->desired_matrix->matrix_h | |
1677 | || (margin_glyphs_to_reserve (w, dim.width, | |
d3d50620 | 1678 | w->left_margin_cols) |
5f5c8ee5 GM |
1679 | != w->desired_matrix->left_margin_glyphs) |
1680 | || (margin_glyphs_to_reserve (w, dim.width, | |
d3d50620 | 1681 | w->right_margin_cols) |
5f5c8ee5 GM |
1682 | != w->desired_matrix->right_margin_glyphs)) |
1683 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1684 | ||
1685 | /* Actually change matrices, if allowed. Do not consider | |
1686 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1687 | may have been changed which we don't now here. We trust | |
59ea14cd | 1688 | that we only will be called with DIM_ONLY_P when |
5f5c8ee5 GM |
1689 | necessary. */ |
1690 | if (!dim_only_p) | |
1691 | { | |
1692 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1693 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1694 | } | |
1695 | } | |
1696 | ||
1697 | /* If we are part of a horizontal combination, advance x for | |
1698 | windows to the right of W; otherwise advance y for windows | |
1699 | below W. */ | |
1700 | if (in_horz_combination_p) | |
1701 | x += dim.width; | |
177c0ea7 | 1702 | else |
5f5c8ee5 GM |
1703 | y += dim.height; |
1704 | ||
1705 | /* Remember maximum glyph matrix dimensions. */ | |
1706 | wmax = max (wmax, dim.width); | |
1707 | hmax = max (hmax, dim.height); | |
1708 | ||
1709 | /* Next window on same level. */ | |
d3d50620 | 1710 | window = w->next; |
5f5c8ee5 GM |
1711 | } |
1712 | while (!NILP (window)); | |
1713 | ||
1714 | /* Set `total' to the total glyph matrix dimension of this window | |
1715 | level. In a vertical combination, the width is the width of the | |
1716 | widest window; the height is the y we finally reached, corrected | |
1717 | by the y we started with. In a horizontal combination, the total | |
1718 | height is the height of the tallest window, and the width is the | |
1719 | x we finally reached, corrected by the x we started with. */ | |
1720 | if (in_horz_combination_p) | |
1721 | { | |
1722 | total.width = x - x0; | |
1723 | total.height = hmax; | |
1724 | } | |
177c0ea7 | 1725 | else |
5f5c8ee5 GM |
1726 | { |
1727 | total.width = wmax; | |
1728 | total.height = y - y0; | |
1729 | } | |
1730 | ||
1731 | return total; | |
1732 | } | |
1733 | ||
1734 | ||
5d3cc43c GM |
1735 | /* Return the required height of glyph matrices for window W. */ |
1736 | ||
2f7c71a1 | 1737 | static int |
971de7fb | 1738 | required_matrix_height (struct window *w) |
5d3cc43c GM |
1739 | { |
1740 | #ifdef HAVE_WINDOW_SYSTEM | |
d3d50620 | 1741 | struct frame *f = XFRAME (w->frame); |
177c0ea7 | 1742 | |
5d3cc43c GM |
1743 | if (FRAME_WINDOW_P (f)) |
1744 | { | |
1745 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1ea40aa2 | 1746 | int window_pixel_height = window_box_height (w) + eabs (w->vscroll); |
5d3cc43c | 1747 | return (((window_pixel_height + ch_height - 1) |
cc834cf9 | 1748 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
1749 | /* One partially visible line at the top and |
1750 | bottom of the window. */ | |
1751 | + 2 | |
153a073c | 1752 | /* 2 for header and mode line. */ |
5d3cc43c GM |
1753 | + 2); |
1754 | } | |
1755 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 1756 | |
7df02016 | 1757 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
1758 | } |
1759 | ||
1760 | ||
1761 | /* Return the required width of glyph matrices for window W. */ | |
1762 | ||
2f7c71a1 | 1763 | static int |
971de7fb | 1764 | required_matrix_width (struct window *w) |
5d3cc43c GM |
1765 | { |
1766 | #ifdef HAVE_WINDOW_SYSTEM | |
d3d50620 | 1767 | struct frame *f = XFRAME (w->frame); |
5d3cc43c GM |
1768 | if (FRAME_WINDOW_P (f)) |
1769 | { | |
1770 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 1771 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 1772 | |
5d3cc43c GM |
1773 | /* Compute number of glyphs needed in a glyph row. */ |
1774 | return (((window_pixel_width + ch_width - 1) | |
cc834cf9 | 1775 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
1776 | /* 2 partially visible columns in the text area. */ |
1777 | + 2 | |
1778 | /* One partially visible column at the right | |
1779 | edge of each marginal area. */ | |
1780 | + 1 + 1); | |
1781 | } | |
1782 | #endif /* HAVE_WINDOW_SYSTEM */ | |
1783 | ||
5f24fa51 | 1784 | return w->total_cols; |
5d3cc43c GM |
1785 | } |
1786 | ||
1787 | ||
5f5c8ee5 | 1788 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 1789 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 1790 | |
5f5c8ee5 | 1791 | static void |
971de7fb | 1792 | allocate_matrices_for_window_redisplay (struct window *w) |
5f5c8ee5 | 1793 | { |
5f5c8ee5 GM |
1794 | while (w) |
1795 | { | |
e74aeda8 DA |
1796 | if (WINDOWP (w->contents)) |
1797 | allocate_matrices_for_window_redisplay (XWINDOW (w->contents)); | |
5f5c8ee5 GM |
1798 | else |
1799 | { | |
1800 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
1801 | struct dim dim; |
1802 | ||
1803 | /* If matrices are not yet allocated, allocate them now. */ | |
1804 | if (w->desired_matrix == NULL) | |
1805 | { | |
1806 | w->desired_matrix = new_glyph_matrix (NULL); | |
1807 | w->current_matrix = new_glyph_matrix (NULL); | |
1808 | } | |
1809 | ||
5d3cc43c GM |
1810 | dim.width = required_matrix_width (w); |
1811 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1812 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
1813 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
1814 | } | |
177c0ea7 | 1815 | |
d3d50620 | 1816 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
5f5c8ee5 GM |
1817 | } |
1818 | } | |
1819 | ||
1820 | ||
1821 | /* Re-allocate/ re-compute glyph matrices on frame F. If F is null, | |
1822 | do it for all frames; otherwise do it just for the given frame. | |
1823 | This function must be called when a new frame is created, its size | |
1824 | changes, or its window configuration changes. */ | |
1825 | ||
1826 | void | |
971de7fb | 1827 | adjust_glyphs (struct frame *f) |
5f5c8ee5 | 1828 | { |
408f5064 GM |
1829 | /* Block input so that expose events and other events that access |
1830 | glyph matrices are not processed while we are changing them. */ | |
4d7e6e51 | 1831 | block_input (); |
408f5064 | 1832 | |
5f5c8ee5 GM |
1833 | if (f) |
1834 | adjust_frame_glyphs (f); | |
1835 | else | |
1836 | { | |
1837 | Lisp_Object tail, lisp_frame; | |
177c0ea7 | 1838 | |
5f5c8ee5 GM |
1839 | FOR_EACH_FRAME (tail, lisp_frame) |
1840 | adjust_frame_glyphs (XFRAME (lisp_frame)); | |
1841 | } | |
408f5064 | 1842 | |
4d7e6e51 | 1843 | unblock_input (); |
5f5c8ee5 GM |
1844 | } |
1845 | ||
5f5c8ee5 GM |
1846 | /* Allocate/reallocate glyph matrices of a single frame F. */ |
1847 | ||
1848 | static void | |
971de7fb | 1849 | adjust_frame_glyphs (struct frame *f) |
5f5c8ee5 GM |
1850 | { |
1851 | if (FRAME_WINDOW_P (f)) | |
1852 | adjust_frame_glyphs_for_window_redisplay (f); | |
1853 | else | |
1854 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 1855 | |
b09cca6a | 1856 | /* Don't forget the buffer for decode_mode_spec. */ |
5f5c8ee5 GM |
1857 | adjust_decode_mode_spec_buffer (f); |
1858 | ||
1859 | f->glyphs_initialized_p = 1; | |
1860 | } | |
1861 | ||
59ea14cd | 1862 | /* Return true if any window in the tree has nonzero window margins. See |
075757cc | 1863 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ |
59ea14cd | 1864 | static bool |
971de7fb | 1865 | showing_window_margins_p (struct window *w) |
075757cc CY |
1866 | { |
1867 | while (w) | |
1868 | { | |
e74aeda8 | 1869 | if (WINDOWP (w->contents)) |
075757cc | 1870 | { |
e74aeda8 | 1871 | if (showing_window_margins_p (XWINDOW (w->contents))) |
075757cc CY |
1872 | return 1; |
1873 | } | |
e74aeda8 | 1874 | else if (!NILP (w->left_margin_cols) || !NILP (w->right_margin_cols)) |
075757cc | 1875 | return 1; |
3fc809e2 | 1876 | |
d3d50620 | 1877 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
075757cc CY |
1878 | } |
1879 | return 0; | |
1880 | } | |
1881 | ||
5f5c8ee5 | 1882 | |
c9f00270 GM |
1883 | /* In the window tree with root W, build current matrices of leaf |
1884 | windows from the frame's current matrix. */ | |
1885 | ||
1886 | static void | |
971de7fb | 1887 | fake_current_matrices (Lisp_Object window) |
c9f00270 GM |
1888 | { |
1889 | struct window *w; | |
177c0ea7 | 1890 | |
d3d50620 | 1891 | for (; !NILP (window); window = w->next) |
c9f00270 GM |
1892 | { |
1893 | w = XWINDOW (window); | |
177c0ea7 | 1894 | |
e74aeda8 DA |
1895 | if (WINDOWP (w->contents)) |
1896 | fake_current_matrices (w->contents); | |
c9f00270 GM |
1897 | else |
1898 | { | |
1899 | int i; | |
d3d50620 | 1900 | struct frame *f = XFRAME (w->frame); |
c9f00270 GM |
1901 | struct glyph_matrix *m = w->current_matrix; |
1902 | struct glyph_matrix *fm = f->current_matrix; | |
1903 | ||
a54e2c05 DA |
1904 | eassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
1905 | eassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 1906 | |
c9f00270 GM |
1907 | for (i = 0; i < m->matrix_h; ++i) |
1908 | { | |
1909 | struct glyph_row *r = m->rows + i; | |
7df02016 | 1910 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 | 1911 | |
a54e2c05 | 1912 | eassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] |
c9f00270 GM |
1913 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); |
1914 | ||
1915 | r->enabled_p = fr->enabled_p; | |
1916 | if (r->enabled_p) | |
1917 | { | |
1918 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
1919 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
1920 | r->used[TEXT_AREA] = (m->matrix_w | |
1921 | - r->used[LEFT_MARGIN_AREA] | |
1922 | - r->used[RIGHT_MARGIN_AREA]); | |
1923 | r->mode_line_p = 0; | |
c9f00270 GM |
1924 | } |
1925 | } | |
1926 | } | |
1927 | } | |
1928 | } | |
1929 | ||
1930 | ||
bccee4f2 | 1931 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 1932 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 1933 | |
bccee4f2 | 1934 | static struct glyph_matrix * |
971de7fb | 1935 | save_current_matrix (struct frame *f) |
c9f00270 | 1936 | { |
bccee4f2 | 1937 | int i; |
38182d90 | 1938 | struct glyph_matrix *saved = xzalloc (sizeof *saved); |
bccee4f2 | 1939 | saved->nrows = f->current_matrix->nrows; |
23f86fce | 1940 | saved->rows = xzalloc (saved->nrows * sizeof *saved->rows); |
bccee4f2 GM |
1941 | |
1942 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 1943 | { |
bccee4f2 GM |
1944 | struct glyph_row *from = f->current_matrix->rows + i; |
1945 | struct glyph_row *to = saved->rows + i; | |
dfd153ae | 1946 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
23f86fce | 1947 | to->glyphs[TEXT_AREA] = xmalloc (nbytes); |
72af86bd | 1948 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
bccee4f2 | 1949 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
e797dea6 | 1950 | } |
bccee4f2 GM |
1951 | |
1952 | return saved; | |
1953 | } | |
1954 | ||
1955 | ||
1956 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
1957 | and free memory associated with SAVED. */ | |
1958 | ||
1959 | static void | |
971de7fb | 1960 | restore_current_matrix (struct frame *f, struct glyph_matrix *saved) |
bccee4f2 GM |
1961 | { |
1962 | int i; | |
1963 | ||
1964 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 1965 | { |
bccee4f2 GM |
1966 | struct glyph_row *from = saved->rows + i; |
1967 | struct glyph_row *to = f->current_matrix->rows + i; | |
dfd153ae | 1968 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
72af86bd | 1969 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
e797dea6 | 1970 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
bccee4f2 | 1971 | xfree (from->glyphs[TEXT_AREA]); |
e797dea6 | 1972 | } |
177c0ea7 | 1973 | |
bccee4f2 GM |
1974 | xfree (saved->rows); |
1975 | xfree (saved); | |
c9f00270 GM |
1976 | } |
1977 | ||
1978 | ||
bccee4f2 | 1979 | |
5f5c8ee5 GM |
1980 | /* Allocate/reallocate glyph matrices of a single frame F for |
1981 | frame-based redisplay. */ | |
1982 | ||
1983 | static void | |
971de7fb | 1984 | adjust_frame_glyphs_for_frame_redisplay (struct frame *f) |
5f5c8ee5 | 1985 | { |
5f5c8ee5 | 1986 | struct dim matrix_dim; |
59ea14cd | 1987 | bool pool_changed_p; |
5f5c8ee5 GM |
1988 | int window_change_flags; |
1989 | int top_window_y; | |
1990 | ||
1991 | if (!FRAME_LIVE_P (f)) | |
1992 | return; | |
1993 | ||
5f5c8ee5 GM |
1994 | top_window_y = FRAME_TOP_MARGIN (f); |
1995 | ||
1996 | /* Allocate glyph pool structures if not already done. */ | |
1997 | if (f->desired_pool == NULL) | |
1998 | { | |
1999 | f->desired_pool = new_glyph_pool (); | |
2000 | f->current_pool = new_glyph_pool (); | |
2001 | } | |
2002 | ||
2003 | /* Allocate frames matrix structures if needed. */ | |
2004 | if (f->desired_matrix == NULL) | |
2005 | { | |
2006 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
2007 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
2008 | } | |
177c0ea7 | 2009 | |
5f5c8ee5 GM |
2010 | /* Compute window glyph matrices. (This takes the mini-buffer |
2011 | window into account). The result is the size of the frame glyph | |
2012 | matrix needed. The variable window_change_flags is set to a bit | |
2013 | mask indicating whether new matrices will be allocated or | |
2014 | existing matrices change their size or location within the frame | |
2015 | matrix. */ | |
2016 | window_change_flags = 0; | |
2017 | matrix_dim | |
2018 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
2019 | 0, top_window_y, | |
5d3cc43c | 2020 | 1, |
5f5c8ee5 GM |
2021 | &window_change_flags); |
2022 | ||
2023 | /* Add in menu bar lines, if any. */ | |
2024 | matrix_dim.height += top_window_y; | |
2025 | ||
2026 | /* Enlarge pools as necessary. */ | |
2027 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
2028 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
2029 | ||
177c0ea7 | 2030 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
2031 | absolutely necessary since it requires a frame redraw. */ |
2032 | if (pool_changed_p || window_change_flags) | |
2033 | { | |
2034 | /* Do it for window matrices. */ | |
2035 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 2036 | 0, top_window_y, 0, |
5f5c8ee5 GM |
2037 | &window_change_flags); |
2038 | ||
2039 | /* Size of frame matrices must equal size of frame. Note | |
2040 | that we are called for X frames with window widths NOT equal | |
2041 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
a54e2c05 | 2042 | eassert (matrix_dim.width == FRAME_COLS (f) |
7df02016 | 2043 | && matrix_dim.height == FRAME_LINES (f)); |
177c0ea7 | 2044 | |
e797dea6 GM |
2045 | /* Pointers to glyph memory in glyph rows are exchanged during |
2046 | the update phase of redisplay, which means in general that a | |
2047 | frame's current matrix consists of pointers into both the | |
2048 | desired and current glyph pool of the frame. Adjusting a | |
2049 | matrix sets the frame matrix up so that pointers are all into | |
2050 | the same pool. If we want to preserve glyph contents of the | |
2051 | current matrix over a call to adjust_glyph_matrix, we must | |
2052 | make a copy of the current glyphs, and restore the current | |
2053 | matrix' contents from that copy. */ | |
2054 | if (display_completed | |
2055 | && !FRAME_GARBAGED_P (f) | |
2056 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
2057 | && matrix_dim.height == f->current_matrix->matrix_h |
2058 | /* For some reason, the frame glyph matrix gets corrupted if | |
2059 | any of the windows contain margins. I haven't been able | |
2060 | to hunt down the reason, but for the moment this prevents | |
2061 | the problem from manifesting. -- cyd */ | |
d5c20fe8 | 2062 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) |
e797dea6 | 2063 | { |
bccee4f2 GM |
2064 | struct glyph_matrix *copy = save_current_matrix (f); |
2065 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2066 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2067 | restore_current_matrix (f, copy); |
e797dea6 GM |
2068 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2069 | } | |
c9f00270 | 2070 | else |
e797dea6 | 2071 | { |
bccee4f2 | 2072 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2073 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2074 | SET_FRAME_GARBAGED (f); | |
2075 | } | |
5f5c8ee5 GM |
2076 | } |
2077 | } | |
2078 | ||
2079 | ||
2080 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2081 | window-based redisplay. */ | |
2082 | ||
2083 | static void | |
971de7fb | 2084 | adjust_frame_glyphs_for_window_redisplay (struct frame *f) |
5f5c8ee5 | 2085 | { |
a54e2c05 | 2086 | eassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); |
177c0ea7 | 2087 | |
5f5c8ee5 | 2088 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2089 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2090 | |
8ce2650d | 2091 | #ifdef HAVE_X_WINDOWS |
5f5c8ee5 GM |
2092 | /* Allocate/ reallocate matrices of the dummy window used to display |
2093 | the menu bar under X when no X toolkit support is available. */ | |
488dd4c4 | 2094 | #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2095 | { |
2096 | /* Allocate a dummy window if not already done. */ | |
d2d37ddc | 2097 | struct window *w; |
e69b0960 | 2098 | if (NILP (f->menu_bar_window)) |
5f5c8ee5 | 2099 | { |
077288cf | 2100 | Lisp_Object frame; |
f00af5b1 | 2101 | fset_menu_bar_window (f, make_window ()); |
e69b0960 | 2102 | w = XWINDOW (f->menu_bar_window); |
077288cf | 2103 | XSETFRAME (frame, f); |
e8c17b81 | 2104 | wset_frame (w, frame); |
5f5c8ee5 GM |
2105 | w->pseudo_window_p = 1; |
2106 | } | |
2107 | else | |
e69b0960 | 2108 | w = XWINDOW (f->menu_bar_window); |
5f5c8ee5 GM |
2109 | |
2110 | /* Set window dimensions to frame dimensions and allocate or | |
2111 | adjust glyph matrices of W. */ | |
5f24fa51 DA |
2112 | w->top_line = 0; |
2113 | w->left_col = 0; | |
2114 | w->total_lines = FRAME_MENU_BAR_LINES (f); | |
2115 | w->total_cols = FRAME_TOTAL_COLS (f); | |
5d3cc43c | 2116 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2117 | } |
57714a86 YM |
2118 | #endif /* not USE_X_TOOLKIT && not USE_GTK */ |
2119 | #endif /* HAVE_X_WINDOWS */ | |
5f5c8ee5 | 2120 | |
488dd4c4 | 2121 | #ifndef USE_GTK |
d2d37ddc PE |
2122 | { |
2123 | /* Allocate/ reallocate matrices of the tool bar window. If we | |
2124 | don't have a tool bar window yet, make one. */ | |
2125 | struct window *w; | |
e69b0960 | 2126 | if (NILP (f->tool_bar_window)) |
d2d37ddc | 2127 | { |
077288cf | 2128 | Lisp_Object frame; |
f00af5b1 | 2129 | fset_tool_bar_window (f, make_window ()); |
e69b0960 | 2130 | w = XWINDOW (f->tool_bar_window); |
077288cf | 2131 | XSETFRAME (frame, f); |
e8c17b81 | 2132 | wset_frame (w, frame); |
d2d37ddc PE |
2133 | w->pseudo_window_p = 1; |
2134 | } | |
2135 | else | |
e69b0960 | 2136 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2137 | |
5f24fa51 DA |
2138 | w->top_line = FRAME_MENU_BAR_LINES (f); |
2139 | w->left_col = 0; | |
2140 | w->total_lines = FRAME_TOOL_BAR_LINES (f); | |
2141 | w->total_cols = FRAME_TOTAL_COLS (f); | |
d2d37ddc PE |
2142 | allocate_matrices_for_window_redisplay (w); |
2143 | } | |
488dd4c4 | 2144 | #endif |
5f5c8ee5 GM |
2145 | } |
2146 | ||
2147 | ||
5f5c8ee5 GM |
2148 | /* Re-allocate buffer for decode_mode_spec on frame F. */ |
2149 | ||
2150 | static void | |
971de7fb | 2151 | adjust_decode_mode_spec_buffer (struct frame *f) |
5f5c8ee5 | 2152 | { |
38182d90 PE |
2153 | f->decode_mode_spec_buffer = xrealloc (f->decode_mode_spec_buffer, |
2154 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
5f5c8ee5 GM |
2155 | } |
2156 | ||
2157 | ||
2158 | \f | |
2159 | /********************************************************************** | |
2160 | Freeing Glyph Matrices | |
2161 | **********************************************************************/ | |
2162 | ||
2163 | /* Free glyph memory for a frame F. F may be null. This function can | |
2164 | be called for the same frame more than once. The root window of | |
2165 | F may be nil when this function is called. This is the case when | |
2166 | the function is called when F is destroyed. */ | |
2167 | ||
2168 | void | |
971de7fb | 2169 | free_glyphs (struct frame *f) |
5f5c8ee5 GM |
2170 | { |
2171 | if (f && f->glyphs_initialized_p) | |
2172 | { | |
42f55fe0 GM |
2173 | /* Block interrupt input so that we don't get surprised by an X |
2174 | event while we're in an inconsistent state. */ | |
4d7e6e51 | 2175 | block_input (); |
5f5c8ee5 | 2176 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2177 | |
5f5c8ee5 | 2178 | /* Release window sub-matrices. */ |
e69b0960 DA |
2179 | if (!NILP (f->root_window)) |
2180 | free_window_matrices (XWINDOW (f->root_window)); | |
5f5c8ee5 | 2181 | |
5a49b79c | 2182 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2183 | /* Free the dummy window for menu bars without X toolkit and its |
2184 | glyph matrices. */ | |
e69b0960 | 2185 | if (!NILP (f->menu_bar_window)) |
5f5c8ee5 | 2186 | { |
e69b0960 | 2187 | struct window *w = XWINDOW (f->menu_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_menu_bar_window (f, Qnil); |
5f5c8ee5 | 2192 | } |
5a49b79c | 2193 | #endif |
5f5c8ee5 | 2194 | |
9ea173e8 | 2195 | /* Free the tool bar window and its glyph matrices. */ |
e69b0960 | 2196 | if (!NILP (f->tool_bar_window)) |
5f5c8ee5 | 2197 | { |
e69b0960 | 2198 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2199 | free_glyph_matrix (w->desired_matrix); |
2200 | free_glyph_matrix (w->current_matrix); | |
2201 | w->desired_matrix = w->current_matrix = NULL; | |
f00af5b1 | 2202 | fset_tool_bar_window (f, Qnil); |
5f5c8ee5 GM |
2203 | } |
2204 | ||
2205 | /* Release frame glyph matrices. Reset fields to zero in | |
2206 | case we are called a second time. */ | |
2207 | if (f->desired_matrix) | |
2208 | { | |
2209 | free_glyph_matrix (f->desired_matrix); | |
2210 | free_glyph_matrix (f->current_matrix); | |
2211 | f->desired_matrix = f->current_matrix = NULL; | |
2212 | } | |
2213 | ||
2214 | /* Release glyph pools. */ | |
2215 | if (f->desired_pool) | |
2216 | { | |
2217 | free_glyph_pool (f->desired_pool); | |
2218 | free_glyph_pool (f->current_pool); | |
2219 | f->desired_pool = f->current_pool = NULL; | |
2220 | } | |
177c0ea7 | 2221 | |
4d7e6e51 | 2222 | unblock_input (); |
5f5c8ee5 GM |
2223 | } |
2224 | } | |
2225 | ||
2226 | ||
2227 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2228 | function may be called with a null pointer, and it may be called on | |
2229 | the same tree more than once. */ | |
2230 | ||
2231 | void | |
971de7fb | 2232 | free_window_matrices (struct window *w) |
5f5c8ee5 GM |
2233 | { |
2234 | while (w) | |
2235 | { | |
e74aeda8 DA |
2236 | if (WINDOWP (w->contents)) |
2237 | free_window_matrices (XWINDOW (w->contents)); | |
177c0ea7 | 2238 | else |
5f5c8ee5 GM |
2239 | { |
2240 | /* This is a leaf window. Free its memory and reset fields | |
2241 | to zero in case this function is called a second time for | |
2242 | W. */ | |
2243 | free_glyph_matrix (w->current_matrix); | |
2244 | free_glyph_matrix (w->desired_matrix); | |
2245 | w->current_matrix = w->desired_matrix = NULL; | |
2246 | } | |
2247 | ||
2248 | /* Next window on same level. */ | |
d3d50620 | 2249 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2250 | } |
2251 | } | |
2252 | ||
2253 | ||
2254 | /* Check glyph memory leaks. This function is called from | |
2255 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2256 | exits. We therefore free all glyph memory for all active frames | |
2257 | explicitly and check that nothing is left allocated. */ | |
2258 | ||
2259 | void | |
971de7fb | 2260 | check_glyph_memory (void) |
5f5c8ee5 GM |
2261 | { |
2262 | Lisp_Object tail, frame; | |
2263 | ||
2264 | /* Free glyph memory for all frames. */ | |
2265 | FOR_EACH_FRAME (tail, frame) | |
2266 | free_glyphs (XFRAME (frame)); | |
2267 | ||
f0b79313 | 2268 | #if defined GLYPH_DEBUG && defined ENABLE_CHECKING |
5f5c8ee5 | 2269 | /* Check that nothing is left allocated. */ |
f0b79313 DA |
2270 | eassert (glyph_matrix_count == 0); |
2271 | eassert (glyph_pool_count == 0); | |
2272 | #endif | |
5f5c8ee5 GM |
2273 | } |
2274 | ||
2275 | ||
2276 | \f | |
2277 | /********************************************************************** | |
2278 | Building a Frame Matrix | |
2279 | **********************************************************************/ | |
2280 | ||
2281 | /* Most of the redisplay code works on glyph matrices attached to | |
2282 | windows. This is a good solution most of the time, but it is not | |
2283 | suitable for terminal code. Terminal output functions cannot rely | |
2284 | on being able to set an arbitrary terminal window. Instead they | |
2285 | must be provided with a view of the whole frame, i.e. the whole | |
2286 | screen. We build such a view by constructing a frame matrix from | |
2287 | window matrices in this section. | |
2288 | ||
2289 | Windows that must be updated have their must_be_update_p flag set. | |
2290 | For all such windows, their desired matrix is made part of the | |
2291 | desired frame matrix. For other windows, their current matrix is | |
2292 | made part of the desired frame matrix. | |
2293 | ||
2294 | +-----------------+----------------+ | |
2295 | | desired | desired | | |
2296 | | | | | |
2297 | +-----------------+----------------+ | |
2298 | | current | | |
2299 | | | | |
2300 | +----------------------------------+ | |
2301 | ||
2302 | Desired window matrices can be made part of the frame matrix in a | |
2303 | cheap way: We exploit the fact that the desired frame matrix and | |
2304 | desired window matrices share their glyph memory. This is not | |
2305 | possible for current window matrices. Their glyphs are copied to | |
2306 | the desired frame matrix. The latter is equivalent to | |
2307 | preserve_other_columns in the old redisplay. | |
2308 | ||
2309 | Used glyphs counters for frame matrix rows are the result of adding | |
2310 | up glyph lengths of the window matrices. A line in the frame | |
2311 | matrix is enabled, if a corresponding line in a window matrix is | |
2312 | enabled. | |
177c0ea7 | 2313 | |
5f5c8ee5 GM |
2314 | After building the desired frame matrix, it will be passed to |
2315 | terminal code, which will manipulate both the desired and current | |
2316 | frame matrix. Changes applied to the frame's current matrix have | |
2317 | to be visible in current window matrices afterwards, of course. | |
2318 | ||
2319 | This problem is solved like this: | |
2320 | ||
2321 | 1. Window and frame matrices share glyphs. Window matrices are | |
2322 | constructed in a way that their glyph contents ARE the glyph | |
2323 | contents needed in a frame matrix. Thus, any modification of | |
2324 | glyphs done in terminal code will be reflected in window matrices | |
2325 | automatically. | |
177c0ea7 | 2326 | |
5f5c8ee5 GM |
2327 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2328 | intercepted by hook functions so that corresponding row operations | |
2329 | on window matrices can be performed. This is necessary because we | |
2330 | use pointers to glyphs in glyph row structures. To satisfy the | |
2331 | assumption of point 1 above that glyphs are updated implicitly in | |
2332 | window matrices when they are manipulated via the frame matrix, | |
2333 | window and frame matrix must of course agree where to find the | |
2334 | glyphs for their rows. Possible manipulations that must be | |
2335 | mirrored are assignments of rows of the desired frame matrix to the | |
2336 | current frame matrix and scrolling the current frame matrix. */ | |
2337 | ||
2338 | /* Build frame F's desired matrix from window matrices. Only windows | |
2339 | which have the flag must_be_updated_p set have to be updated. Menu | |
2340 | bar lines of a frame are not covered by window matrices, so make | |
2341 | sure not to touch them in this function. */ | |
2342 | ||
2343 | static void | |
971de7fb | 2344 | build_frame_matrix (struct frame *f) |
5f5c8ee5 GM |
2345 | { |
2346 | int i; | |
2347 | ||
2348 | /* F must have a frame matrix when this function is called. */ | |
a54e2c05 | 2349 | eassert (!FRAME_WINDOW_P (f)); |
177c0ea7 | 2350 | |
5f5c8ee5 GM |
2351 | /* Clear all rows in the frame matrix covered by window matrices. |
2352 | Menu bar lines are not covered by windows. */ | |
2353 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2354 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2355 | ||
2356 | /* Build the matrix by walking the window tree. */ | |
2357 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2358 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2359 | } | |
2360 | ||
2361 | ||
2362 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2363 | matrices. W is the root of a window tree. */ | |
2364 | ||
2365 | static void | |
971de7fb | 2366 | build_frame_matrix_from_window_tree (struct glyph_matrix *matrix, struct window *w) |
5f5c8ee5 GM |
2367 | { |
2368 | while (w) | |
2369 | { | |
e74aeda8 DA |
2370 | if (WINDOWP (w->contents)) |
2371 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->contents)); | |
5f5c8ee5 GM |
2372 | else |
2373 | build_frame_matrix_from_leaf_window (matrix, w); | |
2374 | ||
d3d50620 | 2375 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2376 | } |
2377 | } | |
2378 | ||
2379 | ||
2380 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2381 | desired frame matrix built. W is a leaf window whose desired or | |
2382 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2383 | must_be_updated_p determines which matrix it contributes to | |
59ea14cd | 2384 | FRAME_MATRIX. If W->must_be_updated_p, W's desired matrix |
5f5c8ee5 GM |
2385 | is added to FRAME_MATRIX, otherwise W's current matrix is added. |
2386 | Adding a desired matrix means setting up used counters and such in | |
2387 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2388 | means copying glyphs. The latter case corresponds to | |
2389 | preserve_other_columns in the old redisplay. */ | |
2390 | ||
2391 | static void | |
971de7fb | 2392 | build_frame_matrix_from_leaf_window (struct glyph_matrix *frame_matrix, struct window *w) |
5f5c8ee5 GM |
2393 | { |
2394 | struct glyph_matrix *window_matrix; | |
2395 | int window_y, frame_y; | |
2396 | /* If non-zero, a glyph to insert at the right border of W. */ | |
3fc809e2 KS |
2397 | GLYPH right_border_glyph; |
2398 | ||
2399 | SET_GLYPH_FROM_CHAR (right_border_glyph, 0); | |
5f5c8ee5 GM |
2400 | |
2401 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2402 | if (w->must_be_updated_p) | |
2403 | { | |
2404 | window_matrix = w->desired_matrix; | |
2405 | ||
2406 | /* Decide whether we want to add a vertical border glyph. */ | |
2407 | if (!WINDOW_RIGHTMOST_P (w)) | |
2408 | { | |
2409 | struct Lisp_Char_Table *dp = window_display_table (w); | |
3fc809e2 | 2410 | Lisp_Object gc; |
b4e49aee | 2411 | |
3fc809e2 KS |
2412 | SET_GLYPH_FROM_CHAR (right_border_glyph, '|'); |
2413 | if (dp | |
d311d28c | 2414 | && (gc = DISP_BORDER_GLYPH (dp), GLYPH_CODE_P (gc))) |
3fc809e2 KS |
2415 | { |
2416 | SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph, gc); | |
2417 | spec_glyph_lookup_face (w, &right_border_glyph); | |
2418 | } | |
b4e49aee | 2419 | |
3fc809e2 KS |
2420 | if (GLYPH_FACE (right_border_glyph) <= 0) |
2421 | SET_GLYPH_FACE (right_border_glyph, VERTICAL_BORDER_FACE_ID); | |
5f5c8ee5 GM |
2422 | } |
2423 | } | |
2424 | else | |
2425 | window_matrix = w->current_matrix; | |
2426 | ||
2427 | /* For all rows in the window matrix and corresponding rows in the | |
2428 | frame matrix. */ | |
2429 | window_y = 0; | |
2430 | frame_y = window_matrix->matrix_y; | |
2431 | while (window_y < window_matrix->nrows) | |
2432 | { | |
2433 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2434 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
59ea14cd | 2435 | bool current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2436 | |
2437 | /* Fill up the frame row with spaces up to the left margin of the | |
2438 | window row. */ | |
2439 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2440 | ||
2441 | /* Fill up areas in the window matrix row with spaces. */ | |
2442 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2443 | |
2444 | /* If only part of W's desired matrix has been built, and | |
2445 | window_row wasn't displayed, use the corresponding current | |
2446 | row instead. */ | |
2447 | if (window_matrix == w->desired_matrix | |
2448 | && !window_row->enabled_p) | |
2449 | { | |
2450 | window_row = w->current_matrix->rows + window_y; | |
2451 | current_row_p = 1; | |
2452 | } | |
177c0ea7 | 2453 | |
2a8bd25f | 2454 | if (current_row_p) |
5f5c8ee5 | 2455 | { |
2a8bd25f | 2456 | /* Copy window row to frame row. */ |
72af86bd AS |
2457 | memcpy (frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, |
2458 | window_row->glyphs[0], | |
2459 | window_matrix->matrix_w * sizeof (struct glyph)); | |
5f5c8ee5 GM |
2460 | } |
2461 | else | |
2462 | { | |
a54e2c05 | 2463 | eassert (window_row->enabled_p); |
177c0ea7 | 2464 | |
2a8bd25f GM |
2465 | /* Only when a desired row has been displayed, we want |
2466 | the corresponding frame row to be updated. */ | |
2467 | frame_row->enabled_p = 1; | |
177c0ea7 | 2468 | |
5f5c8ee5 GM |
2469 | /* Maybe insert a vertical border between horizontally adjacent |
2470 | windows. */ | |
3fc809e2 | 2471 | if (GLYPH_CHAR (right_border_glyph) != 0) |
5f5c8ee5 GM |
2472 | { |
2473 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2474 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2475 | } | |
2476 | ||
e509cfa6 | 2477 | #ifdef GLYPH_DEBUG |
a13396c9 GM |
2478 | /* Window row window_y must be a slice of frame row |
2479 | frame_y. */ | |
a54e2c05 | 2480 | eassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2481 | |
5f5c8ee5 GM |
2482 | /* If rows are in sync, we don't have to copy glyphs because |
2483 | frame and window share glyphs. */ | |
177c0ea7 | 2484 | |
a38634ff | 2485 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2486 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2487 | #endif |
5f5c8ee5 GM |
2488 | } |
2489 | ||
2490 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2491 | up with spaces, and visit leaf windows from left to right it | |
2492 | can be done simply. */ | |
177c0ea7 | 2493 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2494 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2495 | ||
5f5c8ee5 GM |
2496 | /* Next row. */ |
2497 | ++window_y; | |
2498 | ++frame_y; | |
2499 | } | |
2500 | } | |
2501 | ||
5f81871e RS |
2502 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2503 | ID, return a glyph that has a realized face ID. | |
2504 | This is used for glyphs displayed specially and not part of the text; | |
2505 | for instance, vertical separators, truncation markers, etc. */ | |
2506 | ||
3fc809e2 | 2507 | void |
971de7fb | 2508 | spec_glyph_lookup_face (struct window *w, GLYPH *glyph) |
5f81871e | 2509 | { |
3fc809e2 | 2510 | int lface_id = GLYPH_FACE (*glyph); |
5f81871e RS |
2511 | /* Convert the glyph's specified face to a realized (cache) face. */ |
2512 | if (lface_id > 0) | |
2513 | { | |
d3d50620 | 2514 | int face_id = merge_faces (XFRAME (w->frame), |
5f81871e | 2515 | Qt, lface_id, DEFAULT_FACE_ID); |
3fc809e2 | 2516 | SET_GLYPH_FACE (*glyph, face_id); |
5f81871e | 2517 | } |
5f81871e | 2518 | } |
5f5c8ee5 GM |
2519 | |
2520 | /* Add spaces to a glyph row ROW in a window matrix. | |
2521 | ||
2522 | Each row has the form: | |
2523 | ||
2524 | +---------+-----------------------------+------------+ | |
2525 | | left | text | right | | |
2526 | +---------+-----------------------------+------------+ | |
2527 | ||
2528 | Left and right marginal areas are optional. This function adds | |
2529 | spaces to areas so that there are no empty holes between areas. | |
2530 | In other words: If the right area is not empty, the text area | |
2531 | is filled up with spaces up to the right area. If the text area | |
2532 | is not empty, the left area is filled up. | |
2533 | ||
2534 | To be called for frame-based redisplay, only. */ | |
2535 | ||
2536 | static void | |
971de7fb | 2537 | fill_up_glyph_row_with_spaces (struct glyph_row *row) |
5f5c8ee5 GM |
2538 | { |
2539 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2540 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2541 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2542 | } | |
2543 | ||
2544 | ||
2545 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2546 | frame-based redisplay only. */ | |
2547 | ||
2548 | static void | |
971de7fb | 2549 | fill_up_glyph_row_area_with_spaces (struct glyph_row *row, int area) |
5f5c8ee5 GM |
2550 | { |
2551 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2552 | { | |
2553 | struct glyph *end = row->glyphs[area + 1]; | |
2554 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2555 | ||
2556 | while (text < end) | |
2557 | *text++ = space_glyph; | |
2558 | row->used[area] = text - row->glyphs[area]; | |
2559 | } | |
2560 | } | |
2561 | ||
2562 | ||
2563 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2564 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2565 | ||
2566 | static void | |
971de7fb | 2567 | fill_up_frame_row_with_spaces (struct glyph_row *row, int upto) |
5f5c8ee5 GM |
2568 | { |
2569 | int i = row->used[TEXT_AREA]; | |
2570 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2571 | |
5f5c8ee5 GM |
2572 | while (i < upto) |
2573 | glyph[i++] = space_glyph; | |
2574 | ||
2575 | row->used[TEXT_AREA] = i; | |
2576 | } | |
2577 | ||
2578 | ||
2579 | \f | |
2580 | /********************************************************************** | |
2581 | Mirroring operations on frame matrices in window matrices | |
2582 | **********************************************************************/ | |
2583 | ||
2584 | /* Set frame being updated via frame-based redisplay to F. This | |
2585 | function must be called before updates to make explicit that we are | |
2586 | working on frame matrices or not. */ | |
2587 | ||
b0ab8123 | 2588 | static void |
971de7fb | 2589 | set_frame_matrix_frame (struct frame *f) |
5f5c8ee5 GM |
2590 | { |
2591 | frame_matrix_frame = f; | |
2592 | } | |
2593 | ||
2594 | ||
2595 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2596 | DESIRED_MATRIX is the desired matrix corresponding to | |
2597 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2598 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2599 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2600 | done in frame matrices, and that we have to perform analogous | |
2601 | operations in window matrices of frame_matrix_frame. */ | |
2602 | ||
b0ab8123 | 2603 | static void |
971de7fb | 2604 | make_current (struct glyph_matrix *desired_matrix, struct glyph_matrix *current_matrix, int row) |
5f5c8ee5 GM |
2605 | { |
2606 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2607 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
59ea14cd | 2608 | bool mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2609 | |
2610 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2611 | between both rows, and does a structure assignment otherwise. */ | |
2612 | assign_row (current_row, desired_row); | |
2613 | ||
2614 | /* Enable current_row to mark it as valid. */ | |
2615 | current_row->enabled_p = 1; | |
e876ff42 | 2616 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2617 | |
2618 | /* If we are called on frame matrices, perform analogous operations | |
2619 | for window matrices. */ | |
2620 | if (frame_matrix_frame) | |
e69b0960 | 2621 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); |
5f5c8ee5 GM |
2622 | } |
2623 | ||
2624 | ||
2625 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2626 | W's frame which has been made current (by swapping pointers between | |
2627 | current and desired matrix). Perform analogous operations in the | |
2628 | matrices of leaf windows in the window tree rooted at W. */ | |
2629 | ||
2630 | static void | |
971de7fb | 2631 | mirror_make_current (struct window *w, int frame_row) |
5f5c8ee5 GM |
2632 | { |
2633 | while (w) | |
2634 | { | |
e74aeda8 DA |
2635 | if (WINDOWP (w->contents)) |
2636 | mirror_make_current (XWINDOW (w->contents), frame_row); | |
5f5c8ee5 GM |
2637 | else |
2638 | { | |
2639 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2640 | here because the checks performed in debug mode there | |
2641 | will not allow the conversion. */ | |
2642 | int row = frame_row - w->desired_matrix->matrix_y; | |
2643 | ||
2644 | /* If FRAME_ROW is within W, assign the desired row to the | |
2645 | current row (exchanging glyph pointers). */ | |
2646 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
2647 | { | |
2648 | struct glyph_row *current_row | |
2649 | = MATRIX_ROW (w->current_matrix, row); | |
2650 | struct glyph_row *desired_row | |
2651 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
2652 | |
2653 | if (desired_row->enabled_p) | |
2654 | assign_row (current_row, desired_row); | |
2655 | else | |
2656 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 | 2657 | current_row->enabled_p = 1; |
d009ae66 EZ |
2658 | |
2659 | /* Set the Y coordinate of the mode/header line's row. | |
2660 | It is needed in draw_row_with_mouse_face to find the | |
2661 | screen coordinates. (Window-based redisplay sets | |
2662 | this in update_window, but no one seems to do that | |
2663 | for frame-based redisplay.) */ | |
2664 | if (current_row->mode_line_p) | |
2665 | current_row->y = row; | |
5f5c8ee5 GM |
2666 | } |
2667 | } | |
177c0ea7 | 2668 | |
d3d50620 | 2669 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2670 | } |
2671 | } | |
2672 | ||
2673 | ||
2674 | /* Perform row dance after scrolling. We are working on the range of | |
2675 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
2676 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
2677 | row I in the range 0 <= I < NLINES, the index of the original line | |
2678 | to move to I. This index is relative to the row range, i.e. 0 <= | |
2679 | index < NLINES. RETAINED_P is a vector containing zero for each | |
2680 | row 0 <= I < NLINES which is empty. | |
2681 | ||
2682 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 2683 | |
5f5c8ee5 | 2684 | void |
6f704c76 DN |
2685 | mirrored_line_dance (struct glyph_matrix *matrix, int unchanged_at_top, int nlines, |
2686 | int *copy_from, char *retained_p) | |
5f5c8ee5 GM |
2687 | { |
2688 | /* A copy of original rows. */ | |
2689 | struct glyph_row *old_rows; | |
2690 | ||
2691 | /* Rows to assign to. */ | |
2692 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 2693 | |
5f5c8ee5 GM |
2694 | int i; |
2695 | ||
2696 | /* Make a copy of the original rows. */ | |
38182d90 | 2697 | old_rows = alloca (nlines * sizeof *old_rows); |
72af86bd | 2698 | memcpy (old_rows, new_rows, nlines * sizeof *old_rows); |
5f5c8ee5 GM |
2699 | |
2700 | /* Assign new rows, maybe clear lines. */ | |
2701 | for (i = 0; i < nlines; ++i) | |
2702 | { | |
59ea14cd | 2703 | bool enabled_before_p = new_rows[i].enabled_p; |
5f5c8ee5 | 2704 | |
a54e2c05 DA |
2705 | eassert (i + unchanged_at_top < matrix->nrows); |
2706 | eassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
5f5c8ee5 GM |
2707 | new_rows[i] = old_rows[copy_from[i]]; |
2708 | new_rows[i].enabled_p = enabled_before_p; | |
2709 | ||
2710 | /* RETAINED_P is zero for empty lines. */ | |
2711 | if (!retained_p[copy_from[i]]) | |
2712 | new_rows[i].enabled_p = 0; | |
2713 | } | |
2714 | ||
153a073c | 2715 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 | 2716 | if (frame_matrix_frame) |
e69b0960 | 2717 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), |
5f5c8ee5 GM |
2718 | unchanged_at_top, nlines, copy_from, retained_p); |
2719 | } | |
2720 | ||
2721 | ||
a13396c9 | 2722 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 2723 | the current frame matrix. */ |
a13396c9 GM |
2724 | |
2725 | static void | |
971de7fb | 2726 | sync_window_with_frame_matrix_rows (struct window *w) |
a13396c9 | 2727 | { |
d3d50620 | 2728 | struct frame *f = XFRAME (w->frame); |
a13396c9 | 2729 | struct glyph_row *window_row, *window_row_end, *frame_row; |
075c507b | 2730 | int left, right, x, width; |
a13396c9 | 2731 | |
e74aeda8 DA |
2732 | /* Preconditions: W must be a live window on a tty frame. */ |
2733 | eassert (BUFFERP (w->contents)); | |
a54e2c05 | 2734 | eassert (!FRAME_WINDOW_P (f)); |
a13396c9 | 2735 | |
d3d50620 DA |
2736 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
2737 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
2738 | x = w->current_matrix->matrix_x; |
2739 | width = w->current_matrix->matrix_w; | |
2740 | ||
a13396c9 GM |
2741 | window_row = w->current_matrix->rows; |
2742 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 2743 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 2744 | |
5cb88111 | 2745 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 2746 | { |
5cb88111 GM |
2747 | window_row->glyphs[LEFT_MARGIN_AREA] |
2748 | = frame_row->glyphs[0] + x; | |
2749 | window_row->glyphs[TEXT_AREA] | |
2750 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
2751 | window_row->glyphs[LAST_AREA] | |
2752 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
2753 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
2754 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
2755 | } |
2756 | } | |
2757 | ||
2758 | ||
2759 | /* Return the window in the window tree rooted in W containing frame | |
2760 | row ROW. Value is null if none is found. */ | |
2761 | ||
09ad5a91 | 2762 | static struct window * |
971de7fb | 2763 | frame_row_to_window (struct window *w, int row) |
a13396c9 GM |
2764 | { |
2765 | struct window *found = NULL; | |
177c0ea7 | 2766 | |
a13396c9 GM |
2767 | while (w && !found) |
2768 | { | |
e74aeda8 DA |
2769 | if (WINDOWP (w->contents)) |
2770 | found = frame_row_to_window (XWINDOW (w->contents), row); | |
7df02016 KS |
2771 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
2772 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 2773 | found = w; |
177c0ea7 | 2774 | |
d3d50620 | 2775 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
a13396c9 GM |
2776 | } |
2777 | ||
2778 | return found; | |
2779 | } | |
2780 | ||
2781 | ||
5f5c8ee5 GM |
2782 | /* Perform a line dance in the window tree rooted at W, after |
2783 | scrolling a frame matrix in mirrored_line_dance. | |
2784 | ||
2785 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
2786 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
2787 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
2788 | I < NLINES, the index of the original line to move to I. This | |
2789 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
2790 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
2791 | which is empty. */ | |
2792 | ||
2793 | static void | |
971de7fb | 2794 | mirror_line_dance (struct window *w, int unchanged_at_top, int nlines, int *copy_from, char *retained_p) |
5f5c8ee5 GM |
2795 | { |
2796 | while (w) | |
2797 | { | |
e74aeda8 DA |
2798 | if (WINDOWP (w->contents)) |
2799 | mirror_line_dance (XWINDOW (w->contents), unchanged_at_top, | |
5f5c8ee5 GM |
2800 | nlines, copy_from, retained_p); |
2801 | else | |
2802 | { | |
2803 | /* W is a leaf window, and we are working on its current | |
2804 | matrix m. */ | |
2805 | struct glyph_matrix *m = w->current_matrix; | |
59ea14cd PE |
2806 | int i; |
2807 | bool sync_p = 0; | |
5f5c8ee5 GM |
2808 | struct glyph_row *old_rows; |
2809 | ||
2810 | /* Make a copy of the original rows of matrix m. */ | |
38182d90 | 2811 | old_rows = alloca (m->nrows * sizeof *old_rows); |
72af86bd | 2812 | memcpy (old_rows, m->rows, m->nrows * sizeof *old_rows); |
5f5c8ee5 GM |
2813 | |
2814 | for (i = 0; i < nlines; ++i) | |
2815 | { | |
2816 | /* Frame relative line assigned to. */ | |
2817 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 2818 | |
5f5c8ee5 GM |
2819 | /* Frame relative line assigned. */ |
2820 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 2821 | |
5f5c8ee5 GM |
2822 | /* Window relative line assigned to. */ |
2823 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 2824 | |
5f5c8ee5 GM |
2825 | /* Window relative line assigned. */ |
2826 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 2827 | |
5f5c8ee5 | 2828 | /* Is assigned line inside window? */ |
59ea14cd | 2829 | bool from_inside_window_p |
5f5c8ee5 | 2830 | = window_from >= 0 && window_from < m->matrix_h; |
177c0ea7 | 2831 | |
a13396c9 | 2832 | /* Is assigned to line inside window? */ |
59ea14cd | 2833 | bool to_inside_window_p |
a13396c9 | 2834 | = window_to >= 0 && window_to < m->matrix_h; |
177c0ea7 | 2835 | |
a13396c9 | 2836 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 2837 | { |
5f5c8ee5 GM |
2838 | /* Do the assignment. The enabled_p flag is saved |
2839 | over the assignment because the old redisplay did | |
2840 | that. */ | |
59ea14cd | 2841 | bool enabled_before_p = m->rows[window_to].enabled_p; |
5f5c8ee5 GM |
2842 | m->rows[window_to] = old_rows[window_from]; |
2843 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 2844 | |
5f5c8ee5 GM |
2845 | /* If frame line is empty, window line is empty, too. */ |
2846 | if (!retained_p[copy_from[i]]) | |
2847 | m->rows[window_to].enabled_p = 0; | |
2848 | } | |
a13396c9 GM |
2849 | else if (to_inside_window_p) |
2850 | { | |
2851 | /* A copy between windows. This is an infrequent | |
2852 | case not worth optimizing. */ | |
d3d50620 | 2853 | struct frame *f = XFRAME (w->frame); |
a13396c9 GM |
2854 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
2855 | struct window *w2; | |
2856 | struct glyph_matrix *m2; | |
2857 | int m2_from; | |
2858 | ||
fe8b8401 | 2859 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
2860 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
2861 | -nw', FROM_FRAME sometimes has no associated window. | |
2862 | This check avoids a segfault if W2 is null. */ | |
2863 | if (w2) | |
2864 | { | |
2865 | m2 = w2->current_matrix; | |
2866 | m2_from = frame_from - m2->matrix_y; | |
2867 | copy_row_except_pointers (m->rows + window_to, | |
2868 | m2->rows + m2_from); | |
2869 | ||
2870 | /* If frame line is empty, window line is empty, too. */ | |
2871 | if (!retained_p[copy_from[i]]) | |
2872 | m->rows[window_to].enabled_p = 0; | |
2873 | } | |
a13396c9 GM |
2874 | sync_p = 1; |
2875 | } | |
2876 | else if (from_inside_window_p) | |
2877 | sync_p = 1; | |
5f5c8ee5 | 2878 | } |
a13396c9 GM |
2879 | |
2880 | /* If there was a copy between windows, make sure glyph | |
2881 | pointers are in sync with the frame matrix. */ | |
2882 | if (sync_p) | |
2883 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 2884 | |
5f5c8ee5 GM |
2885 | /* Check that no pointers are lost. */ |
2886 | CHECK_MATRIX (m); | |
2887 | } | |
2888 | ||
2889 | /* Next window on same level. */ | |
d3d50620 | 2890 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2891 | } |
2892 | } | |
2893 | ||
2894 | ||
e509cfa6 | 2895 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
2896 | |
2897 | /* Check that window and frame matrices agree about their | |
2898 | understanding where glyphs of the rows are to find. For each | |
2899 | window in the window tree rooted at W, check that rows in the | |
2900 | matrices of leaf window agree with their frame matrices about | |
2901 | glyph pointers. */ | |
2902 | ||
85fece3e | 2903 | static void |
59fc5cf9 | 2904 | check_window_matrix_pointers (struct window *w) |
5f5c8ee5 GM |
2905 | { |
2906 | while (w) | |
2907 | { | |
e74aeda8 DA |
2908 | if (WINDOWP (w->contents)) |
2909 | check_window_matrix_pointers (XWINDOW (w->contents)); | |
5f5c8ee5 | 2910 | else |
60a8948a | 2911 | { |
d3d50620 | 2912 | struct frame *f = XFRAME (w->frame); |
5f5c8ee5 GM |
2913 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); |
2914 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 2915 | } |
177c0ea7 | 2916 | |
d3d50620 | 2917 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
2918 | } |
2919 | } | |
2920 | ||
2921 | ||
2922 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
2923 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
2924 | each row in WINDOW_MATRIX check that it's a slice of the | |
2925 | corresponding frame row. If it isn't, abort. */ | |
2926 | ||
2927 | static void | |
59fc5cf9 AS |
2928 | check_matrix_pointers (struct glyph_matrix *window_matrix, |
2929 | struct glyph_matrix *frame_matrix) | |
5f5c8ee5 GM |
2930 | { |
2931 | /* Row number in WINDOW_MATRIX. */ | |
2932 | int i = 0; | |
2933 | ||
2934 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
2935 | int j = window_matrix->matrix_y; | |
2936 | ||
177c0ea7 | 2937 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
2938 | slice of the row in the frame matrix. If it isn't we didn't |
2939 | mirror an operation on the frame matrix correctly. */ | |
2940 | while (i < window_matrix->nrows) | |
2941 | { | |
2942 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
2943 | frame_matrix->rows + j)) | |
1088b922 | 2944 | emacs_abort (); |
5f5c8ee5 GM |
2945 | ++i, ++j; |
2946 | } | |
2947 | } | |
2948 | ||
e509cfa6 | 2949 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
2950 | |
2951 | ||
2952 | \f | |
2953 | /********************************************************************** | |
2954 | VPOS and HPOS translations | |
2955 | **********************************************************************/ | |
2956 | ||
e509cfa6 | 2957 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
2958 | |
2959 | /* Translate vertical position VPOS which is relative to window W to a | |
2960 | vertical position relative to W's frame. */ | |
2961 | ||
2962 | static int | |
59fc5cf9 | 2963 | window_to_frame_vpos (struct window *w, int vpos) |
5f5c8ee5 | 2964 | { |
d3d50620 | 2965 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
a54e2c05 | 2966 | eassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); |
7df02016 | 2967 | vpos += WINDOW_TOP_EDGE_LINE (w); |
d3d50620 | 2968 | eassert (vpos >= 0 && vpos <= FRAME_LINES (XFRAME (w->frame))); |
5f5c8ee5 GM |
2969 | return vpos; |
2970 | } | |
2971 | ||
2972 | ||
2973 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 2974 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
2975 | |
2976 | static int | |
59fc5cf9 | 2977 | window_to_frame_hpos (struct window *w, int hpos) |
5f5c8ee5 | 2978 | { |
d3d50620 | 2979 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 2980 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
2981 | return hpos; |
2982 | } | |
177c0ea7 | 2983 | |
5f5c8ee5 GM |
2984 | #endif /* GLYPH_DEBUG */ |
2985 | ||
2986 | ||
2987 | \f | |
2988 | /********************************************************************** | |
2989 | Redrawing Frames | |
2990 | **********************************************************************/ | |
2991 | ||
2a14f83b | 2992 | /* Redraw frame F. */ |
5f5c8ee5 | 2993 | |
2a14f83b DA |
2994 | void |
2995 | redraw_frame (struct frame *f) | |
2996 | { | |
2997 | /* Error if F has no glyphs. */ | |
2998 | eassert (f->glyphs_initialized_p); | |
5f5c8ee5 | 2999 | update_begin (f); |
3224dac1 | 3000 | #ifdef MSDOS |
f2adda5e | 3001 | if (FRAME_MSDOS_P (f)) |
79d39b69 | 3002 | FRAME_TERMINAL (f)->set_terminal_modes_hook (FRAME_TERMINAL (f)); |
3224dac1 | 3003 | #endif |
385ed61f | 3004 | clear_frame (f); |
5f5c8ee5 GM |
3005 | clear_current_matrices (f); |
3006 | update_end (f); | |
daf01701 | 3007 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3008 | fflush (FRAME_TTY (f)->output); |
5f5c8ee5 GM |
3009 | windows_or_buffers_changed++; |
3010 | /* Mark all windows as inaccurate, so that every window will have | |
3011 | its redisplay done. */ | |
3012 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
3013 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
3014 | f->garbaged = 0; | |
5f5c8ee5 GM |
3015 | } |
3016 | ||
2a14f83b DA |
3017 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 0, 1, 0, |
3018 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. | |
3019 | If FRAME is omitted or nil, the selected frame is used. */) | |
3020 | (Lisp_Object frame) | |
5f5c8ee5 | 3021 | { |
2a14f83b DA |
3022 | redraw_frame (decode_live_frame (frame)); |
3023 | return Qnil; | |
5f5c8ee5 GM |
3024 | } |
3025 | ||
5f5c8ee5 | 3026 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", |
7ee72033 | 3027 | doc: /* Clear and redisplay all visible frames. */) |
5842a27b | 3028 | (void) |
5f5c8ee5 GM |
3029 | { |
3030 | Lisp_Object tail, frame; | |
3031 | ||
3032 | FOR_EACH_FRAME (tail, frame) | |
3033 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
2a14f83b | 3034 | redraw_frame (XFRAME (frame)); |
5f5c8ee5 GM |
3035 | |
3036 | return Qnil; | |
3037 | } | |
3038 | ||
3039 | ||
5f5c8ee5 | 3040 | \f |
5f5c8ee5 GM |
3041 | /*********************************************************************** |
3042 | Frame Update | |
3043 | ***********************************************************************/ | |
4588ec20 | 3044 | |
5f5c8ee5 | 3045 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 3046 | |
59ea14cd PE |
3047 | If FORCE_P, don't let redisplay be stopped by detecting pending input. |
3048 | If INHIBIT_HAIRY_ID_P, don't try scrolling. | |
177c0ea7 | 3049 | |
59ea14cd | 3050 | Value is true if redisplay was stopped due to pending input. */ |
4588ec20 | 3051 | |
59ea14cd PE |
3052 | bool |
3053 | update_frame (struct frame *f, bool force_p, bool inhibit_hairy_id_p) | |
5f5c8ee5 | 3054 | { |
59ea14cd PE |
3055 | /* True means display has been paused because of pending input. */ |
3056 | bool paused_p; | |
e69b0960 | 3057 | struct window *root_window = XWINDOW (f->root_window); |
5f5c8ee5 | 3058 | |
a2130dbb KS |
3059 | if (redisplay_dont_pause) |
3060 | force_p = 1; | |
6fd326b7 | 3061 | else if (!force_p && detect_input_pending_ignore_squeezables ()) |
d012c62b | 3062 | { |
6fd326b7 DA |
3063 | paused_p = 1; |
3064 | goto do_pause; | |
d012c62b | 3065 | } |
d012c62b | 3066 | |
5f5c8ee5 | 3067 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3068 | { |
5f5c8ee5 GM |
3069 | /* We are working on window matrix basis. All windows whose |
3070 | flag must_be_updated_p is set have to be updated. */ | |
3071 | ||
3072 | /* Record that we are not working on frame matrices. */ | |
3073 | set_frame_matrix_frame (NULL); | |
3074 | ||
3075 | /* Update all windows in the window tree of F, maybe stopping | |
3076 | when pending input is detected. */ | |
3077 | update_begin (f); | |
3078 | ||
5a49b79c | 3079 | #if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
3080 | /* Update the menu bar on X frames that don't have toolkit |
3081 | support. */ | |
e69b0960 DA |
3082 | if (WINDOWP (f->menu_bar_window)) |
3083 | update_window (XWINDOW (f->menu_bar_window), 1); | |
5a49b79c | 3084 | #endif |
5f5c8ee5 GM |
3085 | |
3086 | /* Update the tool-bar window, if present. */ | |
e69b0960 | 3087 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3088 | { |
e69b0960 | 3089 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3090 | |
3091 | /* Update tool-bar window. */ | |
3092 | if (w->must_be_updated_p) | |
4588ec20 | 3093 | { |
153a073c PJ |
3094 | Lisp_Object tem; |
3095 | ||
5f5c8ee5 GM |
3096 | update_window (w, 1); |
3097 | w->must_be_updated_p = 0; | |
3098 | ||
3099 | /* Swap tool-bar strings. We swap because we want to | |
3100 | reuse strings. */ | |
e69b0960 | 3101 | tem = f->current_tool_bar_string; |
f00af5b1 PE |
3102 | fset_current_tool_bar_string (f, f->desired_tool_bar_string); |
3103 | fset_desired_tool_bar_string (f, tem); | |
4588ec20 JB |
3104 | } |
3105 | } | |
177c0ea7 | 3106 | |
5f5c8ee5 GM |
3107 | |
3108 | /* Update windows. */ | |
3109 | paused_p = update_window_tree (root_window, force_p); | |
3110 | update_end (f); | |
177c0ea7 | 3111 | |
6b61353c | 3112 | /* This flush is a performance bottleneck under X, |
e581a466 | 3113 | and it doesn't seem to be necessary anyway (in general). |
6b61353c | 3114 | It is necessary when resizing the window with the mouse, or |
e581a466 | 3115 | at least the fringes are not redrawn in a timely manner. ++kfs */ |
6b61353c | 3116 | if (f->force_flush_display_p) |
e581a466 KL |
3117 | { |
3118 | FRAME_RIF (f)->flush_display (f); | |
3119 | f->force_flush_display_p = 0; | |
3120 | } | |
4588ec20 | 3121 | } |
5f5c8ee5 GM |
3122 | else |
3123 | { | |
3124 | /* We are working on frame matrix basis. Set the frame on whose | |
3125 | frame matrix we operate. */ | |
3126 | set_frame_matrix_frame (f); | |
3127 | ||
868dd24b | 3128 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3129 | build_frame_matrix (f); |
177c0ea7 | 3130 | |
868dd24b GM |
3131 | /* Update the display */ |
3132 | update_begin (f); | |
5f5c8ee5 | 3133 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3134 | update_end (f); |
3135 | ||
7d2f1216 | 3136 | if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f)) |
3224dac1 | 3137 | { |
0b0d3e0b KL |
3138 | if (FRAME_TTY (f)->termscript) |
3139 | fflush (FRAME_TTY (f)->termscript); | |
7d2f1216 EZ |
3140 | if (FRAME_TERMCAP_P (f)) |
3141 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3142 | } |
868dd24b | 3143 | |
5f5c8ee5 | 3144 | /* Check window matrices for lost pointers. */ |
e509cfa6 | 3145 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
3146 | check_window_matrix_pointers (root_window); |
3147 | add_frame_display_history (f, paused_p); | |
3148 | #endif | |
5f5c8ee5 GM |
3149 | } |
3150 | ||
993d4ab6 | 3151 | do_pause: |
5f5c8ee5 GM |
3152 | /* Reset flags indicating that a window should be updated. */ |
3153 | set_window_update_flags (root_window, 0); | |
177c0ea7 | 3154 | |
868dd24b | 3155 | display_completed = !paused_p; |
5f5c8ee5 | 3156 | return paused_p; |
4588ec20 | 3157 | } |
5f5c8ee5 GM |
3158 | |
3159 | ||
4588ec20 | 3160 | \f |
5f5c8ee5 GM |
3161 | /************************************************************************ |
3162 | Window-based updates | |
3163 | ************************************************************************/ | |
3164 | ||
59ea14cd PE |
3165 | /* Perform updates in window tree rooted at W. |
3166 | If FORCE_P, don't stop updating if input is pending. */ | |
5f5c8ee5 | 3167 | |
59ea14cd PE |
3168 | static bool |
3169 | update_window_tree (struct window *w, bool force_p) | |
5f5c8ee5 | 3170 | { |
59ea14cd | 3171 | bool paused_p = 0; |
177c0ea7 | 3172 | |
5f5c8ee5 GM |
3173 | while (w && !paused_p) |
3174 | { | |
e74aeda8 DA |
3175 | if (WINDOWP (w->contents)) |
3176 | paused_p |= update_window_tree (XWINDOW (w->contents), force_p); | |
5f5c8ee5 GM |
3177 | else if (w->must_be_updated_p) |
3178 | paused_p |= update_window (w, force_p); | |
3179 | ||
d3d50620 | 3180 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
5f5c8ee5 GM |
3181 | } |
3182 | ||
3183 | return paused_p; | |
3184 | } | |
3185 | ||
3186 | ||
59ea14cd PE |
3187 | /* Update window W if its flag must_be_updated_p is set. |
3188 | If FORCE_P, don't stop updating if input is pending. */ | |
5f5c8ee5 GM |
3189 | |
3190 | void | |
59ea14cd | 3191 | update_single_window (struct window *w, bool force_p) |
5f5c8ee5 GM |
3192 | { |
3193 | if (w->must_be_updated_p) | |
3194 | { | |
3195 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
3196 | ||
3197 | /* Record that this is not a frame-based redisplay. */ | |
3198 | set_frame_matrix_frame (NULL); | |
3199 | ||
a2130dbb KS |
3200 | if (redisplay_dont_pause) |
3201 | force_p = 1; | |
d012c62b | 3202 | |
5f5c8ee5 GM |
3203 | /* Update W. */ |
3204 | update_begin (f); | |
3205 | update_window (w, force_p); | |
3206 | update_end (f); | |
4588ec20 | 3207 | |
5f5c8ee5 GM |
3208 | /* Reset flag in W. */ |
3209 | w->must_be_updated_p = 0; | |
3210 | } | |
3211 | } | |
4588ec20 | 3212 | |
93e023fc | 3213 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 3214 | |
408f5064 GM |
3215 | /* Redraw lines from the current matrix of window W that are |
3216 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
3217 | ||
3218 | static void | |
971de7fb | 3219 | redraw_overlapped_rows (struct window *w, int yb) |
408f5064 | 3220 | { |
d8ee7803 | 3221 | int i; |
fa971ac3 | 3222 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3fc809e2 | 3223 | |
408f5064 GM |
3224 | /* If rows overlapping others have been changed, the rows being |
3225 | overlapped have to be redrawn. This won't draw lines that have | |
3226 | already been drawn in update_window_line because overlapped_p in | |
3227 | desired rows is 0, so after row assignment overlapped_p in | |
3228 | current rows is 0. */ | |
3229 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
3230 | { | |
e876ff42 | 3231 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
3232 | |
3233 | if (!row->enabled_p) | |
3234 | break; | |
3235 | else if (row->mode_line_p) | |
3236 | continue; | |
177c0ea7 | 3237 | |
408f5064 GM |
3238 | if (row->overlapped_p) |
3239 | { | |
3240 | enum glyph_row_area area; | |
177c0ea7 | 3241 | |
408f5064 GM |
3242 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
3243 | { | |
3244 | updated_row = row; | |
3245 | updated_area = area; | |
fa971ac3 KL |
3246 | FRAME_RIF (f)->cursor_to (i, 0, row->y, |
3247 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 3248 | if (row->used[area]) |
fa971ac3 KL |
3249 | FRAME_RIF (f)->write_glyphs (row->glyphs[area], |
3250 | row->used[area]); | |
3251 | FRAME_RIF (f)->clear_end_of_line (-1); | |
408f5064 | 3252 | } |
177c0ea7 | 3253 | |
408f5064 GM |
3254 | row->overlapped_p = 0; |
3255 | } | |
3256 | ||
e876ff42 | 3257 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
3258 | break; |
3259 | } | |
3260 | } | |
3261 | ||
3262 | ||
3263 | /* Redraw lines from the current matrix of window W that overlap | |
3264 | others. YB is bottom-most y-position in W. */ | |
3265 | ||
3266 | static void | |
971de7fb | 3267 | redraw_overlapping_rows (struct window *w, int yb) |
408f5064 GM |
3268 | { |
3269 | int i, bottom_y; | |
3270 | struct glyph_row *row; | |
fa971ac3 | 3271 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
3fc809e2 | 3272 | |
408f5064 GM |
3273 | for (i = 0; i < w->current_matrix->nrows; ++i) |
3274 | { | |
3275 | row = w->current_matrix->rows + i; | |
3276 | ||
3277 | if (!row->enabled_p) | |
3278 | break; | |
3279 | else if (row->mode_line_p) | |
3280 | continue; | |
177c0ea7 | 3281 | |
408f5064 GM |
3282 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
3283 | ||
b4b2c2ca | 3284 | if (row->overlapping_p) |
408f5064 | 3285 | { |
41124e06 YM |
3286 | int overlaps = 0; |
3287 | ||
b4b2c2ca | 3288 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) && i > 0 |
41124e06 YM |
3289 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) |
3290 | overlaps |= OVERLAPS_PRED; | |
b4b2c2ca | 3291 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) && bottom_y < yb |
41124e06 YM |
3292 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) |
3293 | overlaps |= OVERLAPS_SUCC; | |
3294 | ||
3295 | if (overlaps) | |
3296 | { | |
3297 | if (row->used[LEFT_MARGIN_AREA]) | |
3298 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
3299 | ||
3300 | if (row->used[TEXT_AREA]) | |
3301 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
3302 | ||
3303 | if (row->used[RIGHT_MARGIN_AREA]) | |
3304 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
3305 | ||
c5e87d10 | 3306 | /* Record in neighbor rows that ROW overwrites part of |
41124e06 YM |
3307 | their display. */ |
3308 | if (overlaps & OVERLAPS_PRED) | |
3309 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
3310 | if (overlaps & OVERLAPS_SUCC) | |
3311 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
3312 | } | |
408f5064 GM |
3313 | } |
3314 | ||
3315 | if (bottom_y >= yb) | |
3316 | break; | |
3317 | } | |
3318 | } | |
3319 | ||
93e023fc KS |
3320 | #endif /* HAVE_WINDOW_SYSTEM */ |
3321 | ||
408f5064 | 3322 | |
09ad5a91 | 3323 | #if defined GLYPH_DEBUG && 0 |
93962bfa GM |
3324 | |
3325 | /* Check that no row in the current matrix of window W is enabled | |
3326 | which is below what's displayed in the window. */ | |
3327 | ||
09ad5a91 | 3328 | static void |
971de7fb | 3329 | check_current_matrix_flags (struct window *w) |
93962bfa | 3330 | { |
59ea14cd | 3331 | bool last_seen_p = 0; |
93962bfa GM |
3332 | int i, yb = window_text_bottom_y (w); |
3333 | ||
3334 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
3335 | { | |
3336 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
3337 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3338 | last_seen_p = 1; | |
3339 | else if (last_seen_p && row->enabled_p) | |
1088b922 | 3340 | emacs_abort (); |
93962bfa GM |
3341 | } |
3342 | } | |
3343 | ||
3344 | #endif /* GLYPH_DEBUG */ | |
3345 | ||
3346 | ||
59ea14cd PE |
3347 | /* Update display of window W. |
3348 | If FORCE_P, don't stop updating when input is pending. */ | |
5f5c8ee5 | 3349 | |
59ea14cd PE |
3350 | static bool |
3351 | update_window (struct window *w, bool force_p) | |
4588ec20 | 3352 | { |
5f5c8ee5 | 3353 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
59ea14cd | 3354 | bool paused_p; |
5f5c8ee5 | 3355 | int preempt_count = baud_rate / 2400 + 1; |
597cfb3f | 3356 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
e509cfa6 | 3357 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 3358 | /* Check that W's frame doesn't have glyph matrices. */ |
a54e2c05 | 3359 | eassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 3360 | #endif |
5f5c8ee5 GM |
3361 | |
3362 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb | 3363 | if (!force_p) |
a2d5fca0 | 3364 | detect_input_pending_ignore_squeezables (); |
4588ec20 | 3365 | |
5f5c8ee5 GM |
3366 | /* If forced to complete the update, or if no input is pending, do |
3367 | the update. */ | |
8fd9a666 | 3368 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 3369 | { |
5f5c8ee5 GM |
3370 | struct glyph_row *row, *end; |
3371 | struct glyph_row *mode_line_row; | |
56974e03 | 3372 | struct glyph_row *header_line_row; |
59ea14cd PE |
3373 | int yb; |
3374 | bool changed_p = 0, mouse_face_overwritten_p = 0; | |
0bc32927 | 3375 | int n_updated = 0; |
5f5c8ee5 GM |
3376 | |
3377 | rif->update_window_begin_hook (w); | |
3378 | yb = window_text_bottom_y (w); | |
138c0ae8 EZ |
3379 | row = MATRIX_ROW (desired_matrix, 0); |
3380 | end = MATRIX_MODE_LINE_ROW (desired_matrix); | |
177c0ea7 | 3381 | |
394305db EZ |
3382 | /* Take note of the header line, if there is one. We will |
3383 | update it below, after updating all of the window's lines. */ | |
5f5c8ee5 | 3384 | if (row->mode_line_p) |
56974e03 GM |
3385 | { |
3386 | header_line_row = row; | |
3387 | ++row; | |
3388 | } | |
3389 | else | |
3390 | header_line_row = NULL; | |
5f5c8ee5 GM |
3391 | |
3392 | /* Update the mode line, if necessary. */ | |
3393 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
3394 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
3395 | { | |
3396 | mode_line_row->y = yb; | |
3397 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
3398 | desired_matrix), |
3399 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3400 | } |
3401 | ||
3402 | /* Find first enabled row. Optimizations in redisplay_internal | |
3403 | may lead to an update with only one row enabled. There may | |
3404 | be also completely empty matrices. */ | |
3405 | while (row < end && !row->enabled_p) | |
3406 | ++row; | |
177c0ea7 | 3407 | |
bfdcafe1 | 3408 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 3409 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
3410 | { |
3411 | int rc = scrolling_window (w, header_line_row != NULL); | |
3412 | if (rc < 0) | |
3413 | { | |
3414 | /* All rows were found to be equal. */ | |
3415 | paused_p = 0; | |
3416 | goto set_cursor; | |
3417 | } | |
3418 | else if (rc > 0) | |
6b61353c KH |
3419 | { |
3420 | /* We've scrolled the display. */ | |
3421 | force_p = 1; | |
3422 | changed_p = 1; | |
3423 | } | |
5f5c8ee5 GM |
3424 | } |
3425 | ||
3426 | /* Update the rest of the lines. */ | |
0bc32927 | 3427 | for (; row < end && (force_p || !input_pending); ++row) |
394305db EZ |
3428 | /* scrolling_window resets the enabled_p flag of the rows it |
3429 | reuses from current_matrix. */ | |
b7412313 | 3430 | if (row->enabled_p) |
5f5c8ee5 GM |
3431 | { |
3432 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
3433 | int i; | |
177c0ea7 | 3434 | |
153a073c | 3435 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
3436 | detect_input_pending. If it's done too often, |
3437 | scrolling large windows with repeated scroll-up | |
3438 | commands will too quickly pause redisplay. */ | |
e87b8809 | 3439 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 3440 | detect_input_pending_ignore_squeezables (); |
e876ff42 GM |
3441 | changed_p |= update_window_line (w, vpos, |
3442 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3443 | |
3444 | /* Mark all rows below the last visible one in the current | |
3445 | matrix as invalid. This is necessary because of | |
3446 | variable line heights. Consider the case of three | |
3447 | successive redisplays, where the first displays 5 | |
3448 | lines, the second 3 lines, and the third 5 lines again. | |
3449 | If the second redisplay wouldn't mark rows in the | |
3450 | current matrix invalid, the third redisplay might be | |
3451 | tempted to optimize redisplay based on lines displayed | |
3452 | in the first redisplay. */ | |
3453 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3454 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
3455 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
3456 | } | |
3457 | ||
3458 | /* Was display preempted? */ | |
3459 | paused_p = row < end; | |
177c0ea7 | 3460 | |
56974e03 | 3461 | set_cursor: |
177c0ea7 | 3462 | |
6b61353c KH |
3463 | /* Update the header line after scrolling because a new header |
3464 | line would otherwise overwrite lines at the top of the window | |
3465 | that can be scrolled. */ | |
3466 | if (header_line_row && header_line_row->enabled_p) | |
3467 | { | |
3468 | header_line_row->y = 0; | |
3469 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
6b61353c KH |
3470 | } |
3471 | ||
153a073c | 3472 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
3473 | if (!paused_p && !w->pseudo_window_p) |
3474 | { | |
93e023fc | 3475 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
3476 | if (changed_p && rif->fix_overlapping_area) |
3477 | { | |
3478 | redraw_overlapped_rows (w, yb); | |
3479 | redraw_overlapping_rows (w, yb); | |
3480 | } | |
93e023fc | 3481 | #endif |
177c0ea7 | 3482 | |
5f5c8ee5 GM |
3483 | /* Make cursor visible at cursor position of W. */ |
3484 | set_window_cursor_after_update (w); | |
3485 | ||
e876ff42 GM |
3486 | #if 0 /* Check that current matrix invariants are satisfied. This is |
3487 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
3488 | IF_DEBUG (check_matrix_invariants (w)); |
3489 | #endif | |
4588ec20 | 3490 | } |
5f5c8ee5 | 3491 | |
e509cfa6 | 3492 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
3493 | /* Remember the redisplay method used to display the matrix. */ |
3494 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
3495 | #endif | |
408f5064 | 3496 | |
6b61353c KH |
3497 | #ifdef HAVE_WINDOW_SYSTEM |
3498 | update_window_fringes (w, 0); | |
3499 | #endif | |
3500 | ||
56974e03 GM |
3501 | /* End the update of window W. Don't set the cursor if we |
3502 | paused updating the display because in this case, | |
3503 | set_window_cursor_after_update hasn't been called, and | |
3504 | output_cursor doesn't contain the cursor location. */ | |
3505 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); | |
4588ec20 | 3506 | } |
5f5c8ee5 GM |
3507 | else |
3508 | paused_p = 1; | |
3509 | ||
e509cfa6 | 3510 | #ifdef GLYPH_DEBUG |
0cffd9d8 | 3511 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
3512 | add_window_display_history (w, w->current_matrix->method, paused_p); |
3513 | #endif | |
177c0ea7 | 3514 | |
5f5c8ee5 | 3515 | clear_glyph_matrix (desired_matrix); |
408f5064 | 3516 | |
5f5c8ee5 | 3517 | return paused_p; |
4588ec20 JB |
3518 | } |
3519 | ||
b64b3980 | 3520 | |
5f5c8ee5 GM |
3521 | /* Update the display of area AREA in window W, row number VPOS. |
3522 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
3523 | ||
3524 | static void | |
971de7fb | 3525 | update_marginal_area (struct window *w, int area, int vpos) |
b64b3980 | 3526 | { |
5f5c8ee5 | 3527 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 3528 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
3529 | |
3530 | /* Let functions in xterm.c know what area subsequent X positions | |
3531 | will be relative to. */ | |
3532 | updated_area = area; | |
3533 | ||
3534 | /* Set cursor to start of glyphs, write them, and clear to the end | |
3535 | of the area. I don't think that something more sophisticated is | |
3536 | necessary here, since marginal areas will not be the default. */ | |
3537 | rif->cursor_to (vpos, 0, desired_row->y, 0); | |
3538 | if (desired_row->used[area]) | |
3539 | rif->write_glyphs (desired_row->glyphs[area], desired_row->used[area]); | |
3540 | rif->clear_end_of_line (-1); | |
b64b3980 | 3541 | } |
23b0200c | 3542 | |
352f1545 | 3543 | |
408f5064 | 3544 | /* Update the display of the text area of row VPOS in window W. |
59ea14cd | 3545 | Value is true if display has changed. */ |
5f5c8ee5 | 3546 | |
59ea14cd | 3547 | static bool |
971de7fb | 3548 | update_text_area (struct window *w, int vpos) |
23b0200c | 3549 | { |
5f5c8ee5 GM |
3550 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
3551 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3552 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
59ea14cd | 3553 | bool changed_p = 0; |
5f5c8ee5 GM |
3554 | |
3555 | /* Let functions in xterm.c know what area subsequent X positions | |
3556 | will be relative to. */ | |
3557 | updated_area = TEXT_AREA; | |
177c0ea7 | 3558 | |
5f5c8ee5 GM |
3559 | /* If rows are at different X or Y, or rows have different height, |
3560 | or the current row is marked invalid, write the entire line. */ | |
3561 | if (!current_row->enabled_p | |
3562 | || desired_row->y != current_row->y | |
3563 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
3564 | || desired_row->phys_ascent != current_row->phys_ascent |
3565 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 3566 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 3567 | || current_row->overlapped_p |
fee8b690 CY |
3568 | /* This next line is necessary for correctly redrawing |
3569 | mouse-face areas after scrolling and other operations. | |
3570 | However, it causes excessive flickering when mouse is moved | |
3571 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
3572 | line doesn't seem to hurt anything. -- cyd. |
3573 | But it is still needed for the header line. -- kfs. */ | |
3574 | || (current_row->mouse_face_p | |
3575 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
3576 | || current_row->x != desired_row->x) |
3577 | { | |
3578 | rif->cursor_to (vpos, 0, desired_row->y, desired_row->x); | |
177c0ea7 | 3579 | |
5f5c8ee5 GM |
3580 | if (desired_row->used[TEXT_AREA]) |
3581 | rif->write_glyphs (desired_row->glyphs[TEXT_AREA], | |
3582 | desired_row->used[TEXT_AREA]); | |
177c0ea7 | 3583 | |
5f5c8ee5 GM |
3584 | /* Clear to end of window. */ |
3585 | rif->clear_end_of_line (-1); | |
408f5064 | 3586 | changed_p = 1; |
60f2f3f1 GM |
3587 | |
3588 | /* This erases the cursor. We do this here because | |
3589 | notice_overwritten_cursor cannot easily check this, which | |
3590 | might indicate that the whole functionality of | |
3591 | notice_overwritten_cursor would better be implemented here. | |
3592 | On the other hand, we need notice_overwritten_cursor as long | |
3593 | as mouse highlighting is done asynchronously outside of | |
3594 | redisplay. */ | |
3595 | if (vpos == w->phys_cursor.vpos) | |
3596 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
3597 | } |
3598 | else | |
3599 | { | |
3600 | int stop, i, x; | |
3601 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
3602 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
59ea14cd | 3603 | bool overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 3604 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
59ea14cd | 3605 | bool abort_skipping = 0; |
5f5c8ee5 | 3606 | |
78897758 YM |
3607 | /* If the desired row extends its face to the text area end, and |
3608 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
3609 | make sure we write at least one glyph, so that the face |
3610 | extension actually takes place. */ | |
78897758 YM |
3611 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
3612 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
3613 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
3614 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 3615 | --desired_stop_pos; |
177c0ea7 | 3616 | |
5f5c8ee5 GM |
3617 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
3618 | i = 0; | |
3619 | x = desired_row->x; | |
8399f8a0 GM |
3620 | |
3621 | /* Loop over glyphs that current and desired row may have | |
3622 | in common. */ | |
5f5c8ee5 | 3623 | while (i < stop) |
352f1545 | 3624 | { |
59ea14cd | 3625 | bool can_skip_p = !abort_skipping; |
177c0ea7 | 3626 | |
5f5c8ee5 | 3627 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
3628 | don't have to be written. We can't skip if the last |
3629 | current glyph overlaps the glyph to its right. For | |
3630 | example, consider a current row of `if ' with the `f' in | |
3631 | Courier bold so that it overlaps the ` ' to its right. | |
3632 | If the desired row is ` ', we would skip over the space | |
3633 | after the `if' and there would remain a pixel from the | |
3634 | `f' on the screen. */ | |
3635 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 3636 | { |
e47306e6 GM |
3637 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
3638 | int left, right; | |
177c0ea7 | 3639 | |
d3d50620 | 3640 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
e47306e6 | 3641 | &left, &right); |
91d227d9 | 3642 | can_skip_p = (right == 0 && !abort_skipping); |
352f1545 | 3643 | } |
177c0ea7 | 3644 | |
6d950f4c | 3645 | if (can_skip_p) |
352f1545 | 3646 | { |
91d227d9 CY |
3647 | int start_hpos = i; |
3648 | ||
6d950f4c GM |
3649 | while (i < stop |
3650 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
3651 | { | |
3652 | x += desired_glyph->pixel_width; | |
3653 | ++desired_glyph, ++current_glyph, ++i; | |
3654 | } | |
3655 | ||
3656 | /* Consider the case that the current row contains "xxx | |
3657 | ppp ggg" in italic Courier font, and the desired row | |
3658 | is "xxx ggg". The character `p' has lbearing, `g' | |
3659 | has not. The loop above will stop in front of the | |
3660 | first `p' in the current row. If we would start | |
3661 | writing glyphs there, we wouldn't erase the lbearing | |
3662 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 3663 | taken care of by draw_glyphs. */ |
6d950f4c GM |
3664 | if (overlapping_glyphs_p |
3665 | && i > 0 | |
3666 | && i < current_row->used[TEXT_AREA] | |
3667 | && (current_row->used[TEXT_AREA] | |
3668 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 3669 | { |
6d950f4c | 3670 | int left, right; |
177c0ea7 | 3671 | |
3a45383a | 3672 | rif->get_glyph_overhangs (current_glyph, |
d3d50620 | 3673 | XFRAME (w->frame), |
6d950f4c GM |
3674 | &left, &right); |
3675 | while (left > 0 && i > 0) | |
3676 | { | |
3677 | --i, --desired_glyph, --current_glyph; | |
3678 | x -= desired_glyph->pixel_width; | |
3679 | left -= desired_glyph->pixel_width; | |
3680 | } | |
91d227d9 CY |
3681 | |
3682 | /* Abort the skipping algorithm if we end up before | |
3683 | our starting point, to avoid looping (bug#1070). | |
3684 | This can happen when the lbearing is larger than | |
3685 | the pixel width. */ | |
3686 | abort_skipping = (i < start_hpos); | |
5f5c8ee5 | 3687 | } |
352f1545 | 3688 | } |
177c0ea7 | 3689 | |
5f5c8ee5 GM |
3690 | /* Try to avoid writing the entire rest of the desired row |
3691 | by looking for a resync point. This mainly prevents | |
3692 | mode line flickering in the case the mode line is in | |
3693 | fixed-pitch font, which it usually will be. */ | |
3694 | if (i < desired_row->used[TEXT_AREA]) | |
3695 | { | |
3696 | int start_x = x, start_hpos = i; | |
3697 | struct glyph *start = desired_glyph; | |
3698 | int current_x = x; | |
59ea14cd | 3699 | bool skip_first_p = !can_skip_p; |
6d950f4c | 3700 | |
5f5c8ee5 GM |
3701 | /* Find the next glyph that's equal again. */ |
3702 | while (i < stop | |
6d950f4c GM |
3703 | && (skip_first_p |
3704 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
3705 | && x == current_x) |
3706 | { | |
3707 | x += desired_glyph->pixel_width; | |
3708 | current_x += current_glyph->pixel_width; | |
3709 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 3710 | skip_first_p = 0; |
5f5c8ee5 | 3711 | } |
23b0200c | 3712 | |
5f5c8ee5 GM |
3713 | if (i == start_hpos || x != current_x) |
3714 | { | |
3715 | i = start_hpos; | |
3716 | x = start_x; | |
3717 | desired_glyph = start; | |
3718 | break; | |
3719 | } | |
e47306e6 | 3720 | |
5f5c8ee5 GM |
3721 | rif->cursor_to (vpos, start_hpos, desired_row->y, start_x); |
3722 | rif->write_glyphs (start, i - start_hpos); | |
408f5064 | 3723 | changed_p = 1; |
5f5c8ee5 GM |
3724 | } |
3725 | } | |
177c0ea7 | 3726 | |
5f5c8ee5 GM |
3727 | /* Write the rest. */ |
3728 | if (i < desired_row->used[TEXT_AREA]) | |
3729 | { | |
3730 | rif->cursor_to (vpos, i, desired_row->y, x); | |
3731 | rif->write_glyphs (desired_glyph, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 3732 | changed_p = 1; |
5f5c8ee5 | 3733 | } |
177c0ea7 | 3734 | |
5f5c8ee5 GM |
3735 | /* Maybe clear to end of line. */ |
3736 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
3737 | { | |
3738 | /* If new row extends to the end of the text area, nothing | |
3739 | has to be cleared, if and only if we did a write_glyphs | |
3740 | above. This is made sure by setting desired_stop_pos | |
3741 | appropriately above. */ | |
a54e2c05 | 3742 | eassert (i < desired_row->used[TEXT_AREA] |
78897758 YM |
3743 | || ((desired_row->used[TEXT_AREA] |
3744 | == current_row->used[TEXT_AREA]) | |
3745 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
3746 | } |
3747 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
3748 | { | |
3749 | /* If old row extends to the end of the text area, clear. */ | |
3750 | if (i >= desired_row->used[TEXT_AREA]) | |
3751 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3752 | desired_row->pixel_width); |
5f5c8ee5 | 3753 | rif->clear_end_of_line (-1); |
408f5064 | 3754 | changed_p = 1; |
5f5c8ee5 GM |
3755 | } |
3756 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 3757 | { |
5f5c8ee5 GM |
3758 | /* Otherwise clear to the end of the old row. Everything |
3759 | after that position should be clear already. */ | |
27786b2f | 3760 | int xlim; |
177c0ea7 | 3761 | |
5f5c8ee5 GM |
3762 | if (i >= desired_row->used[TEXT_AREA]) |
3763 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3764 | desired_row->pixel_width); |
5f5c8ee5 GM |
3765 | |
3766 | /* If cursor is displayed at the end of the line, make sure | |
3767 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
3768 | with which to erase the cursor (because this method | |
3769 | doesn't work with lbearing/rbearing), so we must do it | |
3770 | this way. */ | |
3771 | if (vpos == w->phys_cursor.vpos | |
f951a506 EZ |
3772 | && (desired_row->reversed_p |
3773 | ? (w->phys_cursor.hpos < 0) | |
3774 | : (w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]))) | |
5f5c8ee5 GM |
3775 | { |
3776 | w->phys_cursor_on_p = 0; | |
27786b2f | 3777 | xlim = -1; |
5f5c8ee5 GM |
3778 | } |
3779 | else | |
27786b2f PE |
3780 | xlim = current_row->pixel_width; |
3781 | rif->clear_end_of_line (xlim); | |
408f5064 | 3782 | changed_p = 1; |
2e8907d3 | 3783 | } |
23b0200c | 3784 | } |
408f5064 GM |
3785 | |
3786 | return changed_p; | |
23b0200c | 3787 | } |
4588ec20 | 3788 | |
5f5c8ee5 | 3789 | |
59ea14cd | 3790 | /* Update row VPOS in window W. Value is true if display has been changed. */ |
5f5c8ee5 | 3791 | |
59ea14cd PE |
3792 | static bool |
3793 | update_window_line (struct window *w, int vpos, bool *mouse_face_overwritten_p) | |
5f5c8ee5 GM |
3794 | { |
3795 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
3796 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3797 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
59ea14cd | 3798 | bool changed_p = 0; |
5f5c8ee5 | 3799 | |
5f5c8ee5 GM |
3800 | /* Set the row being updated. This is important to let xterm.c |
3801 | know what line height values are in effect. */ | |
3802 | updated_row = desired_row; | |
3803 | ||
177c0ea7 JB |
3804 | /* A row can be completely invisible in case a desired matrix was |
3805 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
3806 | the matrix. Make sure to make such rows current anyway, since |
3807 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
3808 | if (desired_row->mode_line_p |
3809 | || desired_row->visible_height > 0) | |
408f5064 | 3810 | { |
a54e2c05 | 3811 | eassert (desired_row->enabled_p); |
504805ac GM |
3812 | |
3813 | /* Update display of the left margin area, if there is one. */ | |
3814 | if (!desired_row->full_width_p | |
d3d50620 | 3815 | && !NILP (w->left_margin_cols)) |
504805ac GM |
3816 | { |
3817 | changed_p = 1; | |
3818 | update_marginal_area (w, LEFT_MARGIN_AREA, vpos); | |
e9957956 EZ |
3819 | /* Setting this flag will ensure the vertical border, if |
3820 | any, between this window and the one on its left will be | |
3821 | redrawn. This is necessary because updating the left | |
3822 | margin area can potentially draw over the border. */ | |
3823 | current_row->redraw_fringe_bitmaps_p = 1; | |
504805ac | 3824 | } |
177c0ea7 | 3825 | |
504805ac GM |
3826 | /* Update the display of the text area. */ |
3827 | if (update_text_area (w, vpos)) | |
3828 | { | |
3829 | changed_p = 1; | |
3830 | if (current_row->mouse_face_p) | |
3831 | *mouse_face_overwritten_p = 1; | |
3832 | } | |
177c0ea7 | 3833 | |
504805ac GM |
3834 | /* Update display of the right margin area, if there is one. */ |
3835 | if (!desired_row->full_width_p | |
d3d50620 | 3836 | && !NILP (w->right_margin_cols)) |
504805ac GM |
3837 | { |
3838 | changed_p = 1; | |
3839 | update_marginal_area (w, RIGHT_MARGIN_AREA, vpos); | |
3840 | } | |
177c0ea7 | 3841 | |
504805ac GM |
3842 | /* Draw truncation marks etc. */ |
3843 | if (!current_row->enabled_p | |
3844 | || desired_row->y != current_row->y | |
3845 | || desired_row->visible_height != current_row->visible_height | |
6b61353c | 3846 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 3847 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
6b61353c | 3848 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 3849 | || desired_row->mode_line_p != current_row->mode_line_p |
6b61353c | 3850 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
3851 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
3852 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
3853 | rif->after_update_window_line_hook (desired_row); | |
408f5064 | 3854 | } |
177c0ea7 | 3855 | |
5f5c8ee5 GM |
3856 | /* Update current_row from desired_row. */ |
3857 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
3858 | updated_row = NULL; | |
408f5064 | 3859 | return changed_p; |
5f5c8ee5 GM |
3860 | } |
3861 | ||
3862 | ||
3863 | /* Set the cursor after an update of window W. This function may only | |
3864 | be called from update_window. */ | |
3865 | ||
3866 | static void | |
971de7fb | 3867 | set_window_cursor_after_update (struct window *w) |
4588ec20 | 3868 | { |
d3d50620 | 3869 | struct frame *f = XFRAME (w->frame); |
fa971ac3 | 3870 | struct redisplay_interface *rif = FRAME_RIF (f); |
5f5c8ee5 GM |
3871 | int cx, cy, vpos, hpos; |
3872 | ||
3873 | /* Not intended for frame matrix updates. */ | |
a54e2c05 | 3874 | eassert (FRAME_WINDOW_P (f)); |
177c0ea7 | 3875 | |
b96fd3e8 GM |
3876 | if (cursor_in_echo_area |
3877 | && !NILP (echo_area_buffer[0]) | |
3878 | /* If we are showing a message instead of the mini-buffer, | |
3879 | show the cursor for the message instead. */ | |
3880 | && XWINDOW (minibuf_window) == w | |
3881 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
3882 | /* These cases apply only to the frame that contains |
3883 | the active mini-buffer window. */ | |
3884 | && FRAME_HAS_MINIBUF_P (f) | |
3885 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
3886 | { | |
3887 | cx = cy = vpos = hpos = 0; | |
3888 | ||
3889 | if (cursor_in_echo_area >= 0) | |
3890 | { | |
3891 | /* If the mini-buffer is several lines high, find the last | |
3892 | line that has any text on it. Note: either all lines | |
3893 | are enabled or none. Otherwise we wouldn't be able to | |
3894 | determine Y. */ | |
862b4790 GM |
3895 | struct glyph_row *row, *last_row; |
3896 | struct glyph *glyph; | |
3897 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 3898 | |
862b4790 | 3899 | last_row = NULL; |
6206f8ce GM |
3900 | row = w->current_matrix->rows; |
3901 | while (row->enabled_p | |
3902 | && (last_row == NULL | |
3903 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 3904 | { |
862b4790 GM |
3905 | if (row->used[TEXT_AREA] |
3906 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
3907 | last_row = row; | |
6206f8ce | 3908 | ++row; |
862b4790 | 3909 | } |
177c0ea7 | 3910 | |
5f5c8ee5 GM |
3911 | if (last_row) |
3912 | { | |
6206f8ce GM |
3913 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
3914 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 3915 | |
b96fd3e8 | 3916 | while (last > start && last->charpos < 0) |
862b4790 | 3917 | --last; |
177c0ea7 | 3918 | |
862b4790 GM |
3919 | for (glyph = start; glyph < last; ++glyph) |
3920 | { | |
3921 | cx += glyph->pixel_width; | |
3922 | ++hpos; | |
3923 | } | |
3924 | ||
5f5c8ee5 | 3925 | cy = last_row->y; |
862b4790 | 3926 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
3927 | } |
3928 | } | |
3929 | } | |
3930 | else | |
3931 | { | |
3932 | cx = w->cursor.x; | |
3933 | cy = w->cursor.y; | |
3934 | hpos = w->cursor.hpos; | |
3935 | vpos = w->cursor.vpos; | |
3936 | } | |
4588ec20 | 3937 | |
2dd61a9b | 3938 | /* Window cursor can be out of sync for horizontally split windows. |
cccaebd2 | 3939 | Horizontal position is -1 when cursor is on the left fringe. */ |
2dd61a9b DA |
3940 | hpos = clip_to_bounds (-1, hpos, w->current_matrix->matrix_w - 1); |
3941 | vpos = clip_to_bounds (0, vpos, w->current_matrix->nrows - 1); | |
5f5c8ee5 | 3942 | rif->cursor_to (vpos, hpos, cy, cx); |
4588ec20 | 3943 | } |
4588ec20 | 3944 | |
5f5c8ee5 | 3945 | |
6df5d75f GM |
3946 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window |
3947 | tree rooted at W. */ | |
3948 | ||
3949 | void | |
59ea14cd | 3950 | set_window_update_flags (struct window *w, bool on_p) |
6df5d75f GM |
3951 | { |
3952 | while (w) | |
3953 | { | |
e74aeda8 DA |
3954 | if (WINDOWP (w->contents)) |
3955 | set_window_update_flags (XWINDOW (w->contents), on_p); | |
6df5d75f GM |
3956 | else |
3957 | w->must_be_updated_p = on_p; | |
3958 | ||
d3d50620 | 3959 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
6df5d75f | 3960 | } |
177c0ea7 | 3961 | } |
6df5d75f GM |
3962 | |
3963 | ||
3964 | \f | |
3965 | /*********************************************************************** | |
3966 | Window-Based Scrolling | |
3967 | ***********************************************************************/ | |
3968 | ||
3969 | /* Structure describing rows in scrolling_window. */ | |
3970 | ||
3971 | struct row_entry | |
3972 | { | |
3973 | /* Number of occurrences of this row in desired and current matrix. */ | |
3974 | int old_uses, new_uses; | |
177c0ea7 | 3975 | |
6df5d75f GM |
3976 | /* Vpos of row in new matrix. */ |
3977 | int new_line_number; | |
3978 | ||
3979 | /* Bucket index of this row_entry in the hash table row_table. */ | |
ca9ce8f2 | 3980 | ptrdiff_t bucket; |
177c0ea7 | 3981 | |
6df5d75f GM |
3982 | /* The row described by this entry. */ |
3983 | struct glyph_row *row; | |
177c0ea7 | 3984 | |
6df5d75f GM |
3985 | /* Hash collision chain. */ |
3986 | struct row_entry *next; | |
3987 | }; | |
3988 | ||
3989 | /* A pool to allocate row_entry structures from, and the size of the | |
3990 | pool. The pool is reallocated in scrolling_window when we find | |
3991 | that we need a larger one. */ | |
3992 | ||
3993 | static struct row_entry *row_entry_pool; | |
ca9ce8f2 | 3994 | static ptrdiff_t row_entry_pool_size; |
6df5d75f GM |
3995 | |
3996 | /* Index of next free entry in row_entry_pool. */ | |
3997 | ||
ca9ce8f2 | 3998 | static ptrdiff_t row_entry_idx; |
6df5d75f GM |
3999 | |
4000 | /* The hash table used during scrolling, and the table's size. This | |
4001 | table is used to quickly identify equal rows in the desired and | |
4002 | current matrix. */ | |
4003 | ||
4004 | static struct row_entry **row_table; | |
ca9ce8f2 | 4005 | static ptrdiff_t row_table_size; |
6df5d75f GM |
4006 | |
4007 | /* Vectors of pointers to row_entry structures belonging to the | |
4008 | current and desired matrix, and the size of the vectors. */ | |
4009 | ||
4010 | static struct row_entry **old_lines, **new_lines; | |
0065d054 | 4011 | static ptrdiff_t old_lines_size, new_lines_size; |
6df5d75f GM |
4012 | |
4013 | /* A pool to allocate run structures from, and its size. */ | |
4014 | ||
4015 | static struct run *run_pool; | |
0065d054 | 4016 | static ptrdiff_t runs_size; |
6df5d75f GM |
4017 | |
4018 | /* A vector of runs of lines found during scrolling. */ | |
4019 | ||
4020 | static struct run **runs; | |
4021 | ||
6b1f9ba4 | 4022 | /* Add glyph row ROW to the scrolling hash table. */ |
6df5d75f | 4023 | |
b0ab8123 | 4024 | static struct row_entry * |
6b1f9ba4 | 4025 | add_row_entry (struct glyph_row *row) |
6df5d75f GM |
4026 | { |
4027 | struct row_entry *entry; | |
ca9ce8f2 | 4028 | ptrdiff_t i = row->hash % row_table_size; |
177c0ea7 | 4029 | |
6df5d75f | 4030 | entry = row_table[i]; |
a54e2c05 | 4031 | eassert (entry || verify_row_hash (row)); |
6b1f9ba4 | 4032 | while (entry && !row_equal_p (entry->row, row, 1)) |
6df5d75f | 4033 | entry = entry->next; |
177c0ea7 | 4034 | |
6df5d75f GM |
4035 | if (entry == NULL) |
4036 | { | |
4037 | entry = row_entry_pool + row_entry_idx++; | |
4038 | entry->row = row; | |
4039 | entry->old_uses = entry->new_uses = 0; | |
4040 | entry->new_line_number = 0; | |
4041 | entry->bucket = i; | |
4042 | entry->next = row_table[i]; | |
4043 | row_table[i] = entry; | |
4044 | } | |
4045 | ||
4046 | return entry; | |
4047 | } | |
4048 | ||
4049 | ||
5f5c8ee5 | 4050 | /* Try to reuse part of the current display of W by scrolling lines. |
59ea14cd | 4051 | HEADER_LINE_P means W has a header line. |
5f5c8ee5 GM |
4052 | |
4053 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4054 | Technique for Isolating Differences Between Files." It should take | |
4055 | O(N) time. | |
4056 | ||
4057 | A short outline of the steps of the algorithm | |
4058 | ||
4059 | 1. Skip lines equal at the start and end of both matrices. | |
4060 | ||
4061 | 2. Enter rows in the current and desired matrix into a symbol | |
4062 | table, counting how often they appear in both matrices. | |
4063 | ||
4064 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4065 | i.e. we assume that such lines are likely to have been moved. | |
4066 | ||
4067 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4068 | forward and backward. | |
4069 | ||
4070 | Value is | |
4071 | ||
4072 | -1 if all rows were found to be equal. | |
4073 | 0 to indicate that we did not scroll the display, or | |
4074 | 1 if we did scroll. */ | |
4075 | ||
4076 | static int | |
59ea14cd | 4077 | scrolling_window (struct window *w, bool header_line_p) |
4588ec20 | 4078 | { |
5f5c8ee5 GM |
4079 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4080 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4081 | int yb = window_text_bottom_y (w); | |
ca9ce8f2 PE |
4082 | ptrdiff_t i; |
4083 | int j, first_old, first_new, last_old, last_new; | |
4084 | int nruns, run_idx; | |
0065d054 | 4085 | ptrdiff_t n; |
6df5d75f | 4086 | struct row_entry *entry; |
fa971ac3 | 4087 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4088 | |
4089 | /* Skip over rows equal at the start. */ | |
59ea14cd | 4090 | for (i = header_line_p; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4091 | { |
bfdcafe1 GM |
4092 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4093 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4094 | ||
4095 | if (c->enabled_p | |
4096 | && d->enabled_p | |
6b61353c | 4097 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4098 | && c->y == d->y |
4099 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4100 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
6b1f9ba4 | 4101 | && row_equal_p (c, d, 1)) |
bfdcafe1 GM |
4102 | { |
4103 | assign_row (c, d); | |
4104 | d->enabled_p = 0; | |
4105 | } | |
4106 | else | |
4107 | break; | |
5f5c8ee5 | 4108 | } |
4588ec20 | 4109 | |
5f5c8ee5 GM |
4110 | /* Give up if some rows in the desired matrix are not enabled. */ |
4111 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4112 | return -1; | |
177c0ea7 | 4113 | |
5f5c8ee5 GM |
4114 | first_old = first_new = i; |
4115 | ||
4d8ade89 YM |
4116 | /* Set last_new to the index + 1 of the row that reaches the |
4117 | bottom boundary in the desired matrix. Give up if we find a | |
4118 | disabled row before we reach the bottom boundary. */ | |
5f5c8ee5 | 4119 | i = first_new + 1; |
4d8ade89 YM |
4120 | while (i < desired_matrix->nrows - 1) |
4121 | { | |
4122 | int bottom; | |
5f5c8ee5 | 4123 | |
4d8ade89 YM |
4124 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) |
4125 | return 0; | |
4126 | bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)); | |
4127 | if (bottom <= yb) | |
4128 | ++i; | |
4129 | if (bottom >= yb) | |
4130 | break; | |
4131 | } | |
5f5c8ee5 GM |
4132 | |
4133 | last_new = i; | |
4134 | ||
4d8ade89 YM |
4135 | /* Set last_old to the index + 1 of the row that reaches the bottom |
4136 | boundary in the current matrix. We don't look at the enabled | |
4137 | flag here because we plan to reuse part of the display even if | |
4138 | other parts are disabled. */ | |
5f5c8ee5 | 4139 | i = first_old + 1; |
93962bfa GM |
4140 | while (i < current_matrix->nrows - 1) |
4141 | { | |
4142 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4143 | if (bottom <= yb) | |
4144 | ++i; | |
4145 | if (bottom >= yb) | |
4146 | break; | |
4147 | } | |
4148 | ||
5f5c8ee5 GM |
4149 | last_old = i; |
4150 | ||
4151 | /* Skip over rows equal at the bottom. */ | |
4152 | i = last_new; | |
4153 | j = last_old; | |
4154 | while (i - 1 > first_new | |
4155 | && j - 1 > first_old | |
1e5b2111 EZ |
4156 | && MATRIX_ROW (current_matrix, j - 1)->enabled_p |
4157 | && (MATRIX_ROW (current_matrix, j - 1)->y | |
4158 | == MATRIX_ROW (desired_matrix, i - 1)->y) | |
4159 | && !MATRIX_ROW (desired_matrix, i - 1)->redraw_fringe_bitmaps_p | |
6b1f9ba4 | 4160 | && row_equal_p (MATRIX_ROW (desired_matrix, i - 1), |
e4e0bee9 | 4161 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
4162 | --i, --j; |
4163 | last_new = i; | |
4164 | last_old = j; | |
4165 | ||
4166 | /* Nothing to do if all rows are equal. */ | |
4167 | if (last_new == first_new) | |
4168 | return 0; | |
4169 | ||
0065d054 | 4170 | /* Check for integer overflow in size calculation. |
ca9ce8f2 PE |
4171 | |
4172 | If next_almost_prime checks (N) for divisibility by 2..10, then | |
4173 | it can return at most N + 10, e.g., next_almost_prime (1) == 11. | |
4174 | So, set next_almost_prime_increment_max to 10. | |
4175 | ||
4176 | It's just a coincidence that next_almost_prime_increment_max == | |
4177 | NEXT_ALMOST_PRIME_LIMIT - 1. If NEXT_ALMOST_PRIME_LIMIT were | |
4178 | 13, then next_almost_prime_increment_max would be 14, e.g., | |
4179 | because next_almost_prime (113) would be 127. */ | |
4180 | { | |
4181 | verify (NEXT_ALMOST_PRIME_LIMIT == 11); | |
4182 | enum { next_almost_prime_increment_max = 10 }; | |
ca9ce8f2 | 4183 | ptrdiff_t row_table_max = |
0065d054 PE |
4184 | (min (PTRDIFF_MAX, SIZE_MAX) / (3 * sizeof *row_table) |
4185 | - next_almost_prime_increment_max); | |
4186 | ptrdiff_t current_nrows_max = row_table_max - desired_matrix->nrows; | |
4187 | if (current_nrows_max < current_matrix->nrows) | |
ca9ce8f2 PE |
4188 | memory_full (SIZE_MAX); |
4189 | } | |
4190 | ||
6df5d75f | 4191 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 4192 | |
6df5d75f | 4193 | if (current_matrix->nrows > old_lines_size) |
0065d054 PE |
4194 | old_lines = xpalloc (old_lines, &old_lines_size, |
4195 | current_matrix->nrows - old_lines_size, | |
4196 | INT_MAX, sizeof *old_lines); | |
177c0ea7 | 4197 | |
6df5d75f | 4198 | if (desired_matrix->nrows > new_lines_size) |
0065d054 PE |
4199 | new_lines = xpalloc (new_lines, &new_lines_size, |
4200 | desired_matrix->nrows - new_lines_size, | |
4201 | INT_MAX, sizeof *new_lines); | |
6df5d75f | 4202 | |
ca9ce8f2 PE |
4203 | n = desired_matrix->nrows; |
4204 | n += current_matrix->nrows; | |
0065d054 | 4205 | if (row_table_size < 3 * n) |
6df5d75f | 4206 | { |
ca9ce8f2 | 4207 | ptrdiff_t size = next_almost_prime (3 * n); |
0065d054 | 4208 | row_table = xnrealloc (row_table, size, sizeof *row_table); |
ca9ce8f2 | 4209 | row_table_size = size; |
0065d054 | 4210 | memset (row_table, 0, size * sizeof *row_table); |
6df5d75f GM |
4211 | } |
4212 | ||
4213 | if (n > row_entry_pool_size) | |
0065d054 PE |
4214 | row_entry_pool = xpalloc (row_entry_pool, &row_entry_pool_size, |
4215 | n - row_entry_pool_size, | |
4216 | -1, sizeof *row_entry_pool); | |
6df5d75f GM |
4217 | |
4218 | if (desired_matrix->nrows > runs_size) | |
4219 | { | |
0065d054 PE |
4220 | runs = xnrealloc (runs, desired_matrix->nrows, sizeof *runs); |
4221 | run_pool = xnrealloc (run_pool, desired_matrix->nrows, sizeof *run_pool); | |
ca9ce8f2 | 4222 | runs_size = desired_matrix->nrows; |
6df5d75f GM |
4223 | } |
4224 | ||
4225 | nruns = run_idx = 0; | |
4226 | row_entry_idx = 0; | |
4227 | ||
4228 | /* Add rows from the current and desired matrix to the hash table | |
4229 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 4230 | |
5f5c8ee5 GM |
4231 | for (i = first_old; i < last_old; ++i) |
4232 | { | |
4233 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
4234 | { | |
6b1f9ba4 | 4235 | entry = add_row_entry (MATRIX_ROW (current_matrix, i)); |
6df5d75f GM |
4236 | old_lines[i] = entry; |
4237 | ++entry->old_uses; | |
5f5c8ee5 GM |
4238 | } |
4239 | else | |
6df5d75f | 4240 | old_lines[i] = NULL; |
5f5c8ee5 GM |
4241 | } |
4242 | ||
5f5c8ee5 GM |
4243 | for (i = first_new; i < last_new; ++i) |
4244 | { | |
a54e2c05 | 4245 | eassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); |
6b1f9ba4 | 4246 | entry = add_row_entry (MATRIX_ROW (desired_matrix, i)); |
6df5d75f GM |
4247 | ++entry->new_uses; |
4248 | entry->new_line_number = i; | |
4249 | new_lines[i] = entry; | |
5f5c8ee5 | 4250 | } |
4588ec20 | 4251 | |
5f5c8ee5 GM |
4252 | /* Identify moves based on lines that are unique and equal |
4253 | in both matrices. */ | |
4254 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
4255 | if (old_lines[i] |
4256 | && old_lines[i]->old_uses == 1 | |
4257 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 | 4258 | { |
27786b2f | 4259 | int p, q; |
6df5d75f GM |
4260 | int new_line = old_lines[i]->new_line_number; |
4261 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
4262 | |
4263 | /* Record move. */ | |
4264 | run->current_vpos = i; | |
4265 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
4266 | run->desired_vpos = new_line; | |
4267 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
4268 | run->nrows = 1; | |
4269 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
4270 | ||
4271 | /* Extend backward. */ | |
27786b2f PE |
4272 | p = i - 1; |
4273 | q = new_line - 1; | |
4274 | while (p > first_old | |
4275 | && q > first_new | |
4276 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4277 | { |
27786b2f | 4278 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 JB |
4279 | --run->current_vpos; |
4280 | --run->desired_vpos; | |
5f5c8ee5 GM |
4281 | ++run->nrows; |
4282 | run->height += h; | |
4283 | run->desired_y -= h; | |
4284 | run->current_y -= h; | |
27786b2f | 4285 | --p, --q; |
5f5c8ee5 | 4286 | } |
4588ec20 | 4287 | |
5f5c8ee5 | 4288 | /* Extend forward. */ |
27786b2f PE |
4289 | p = i + 1; |
4290 | q = new_line + 1; | |
4291 | while (p < last_old | |
4292 | && q < last_new | |
4293 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4294 | { |
27786b2f | 4295 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 | 4296 | ++run->nrows; |
5f5c8ee5 | 4297 | run->height += h; |
27786b2f | 4298 | ++p, ++q; |
5f5c8ee5 | 4299 | } |
19dff8dc | 4300 | |
5f5c8ee5 GM |
4301 | /* Insert run into list of all runs. Order runs by copied |
4302 | pixel lines. Note that we record runs that don't have to | |
4303 | be copied because they are already in place. This is done | |
4304 | because we can avoid calling update_window_line in this | |
4305 | case. */ | |
27786b2f | 4306 | for (p = 0; p < nruns && runs[p]->height > run->height; ++p) |
5f5c8ee5 | 4307 | ; |
27786b2f PE |
4308 | for (q = nruns; q > p; --q) |
4309 | runs[q] = runs[q - 1]; | |
4310 | runs[p] = run; | |
5f5c8ee5 GM |
4311 | ++nruns; |
4312 | ||
4313 | i += run->nrows; | |
4314 | } | |
4315 | else | |
4316 | ++i; | |
4588ec20 | 4317 | |
5f5c8ee5 GM |
4318 | /* Do the moves. Do it in a way that we don't overwrite something |
4319 | we want to copy later on. This is not solvable in general | |
4320 | because there is only one display and we don't have a way to | |
4321 | exchange areas on this display. Example: | |
4588ec20 | 4322 | |
5f5c8ee5 GM |
4323 | +-----------+ +-----------+ |
4324 | | A | | B | | |
4325 | +-----------+ --> +-----------+ | |
4326 | | B | | A | | |
4327 | +-----------+ +-----------+ | |
4588ec20 | 4328 | |
5f5c8ee5 GM |
4329 | Instead, prefer bigger moves, and invalidate moves that would |
4330 | copy from where we copied to. */ | |
ea0d86af | 4331 | |
5f5c8ee5 GM |
4332 | for (i = 0; i < nruns; ++i) |
4333 | if (runs[i]->nrows > 0) | |
4334 | { | |
4335 | struct run *r = runs[i]; | |
24e86043 | 4336 | |
5f5c8ee5 GM |
4337 | /* Copy on the display. */ |
4338 | if (r->current_y != r->desired_y) | |
4339 | { | |
989b42d2 | 4340 | rif->clear_window_mouse_face (w); |
5f5c8ee5 | 4341 | rif->scroll_run_hook (w, r); |
1305621b | 4342 | } |
5f5c8ee5 | 4343 | |
1305621b YM |
4344 | /* Truncate runs that copy to where we copied to, and |
4345 | invalidate runs that copy from where we copied to. */ | |
4346 | for (j = nruns - 1; j > i; --j) | |
4347 | { | |
4348 | struct run *p = runs[j]; | |
59ea14cd | 4349 | bool truncated_p = 0; |
5f5c8ee5 | 4350 | |
1305621b YM |
4351 | if (p->nrows > 0 |
4352 | && p->desired_y < r->desired_y + r->height | |
4353 | && p->desired_y + p->height > r->desired_y) | |
5f5c8ee5 | 4354 | { |
1305621b YM |
4355 | if (p->desired_y < r->desired_y) |
4356 | { | |
4357 | p->nrows = r->desired_vpos - p->desired_vpos; | |
4358 | p->height = r->desired_y - p->desired_y; | |
4359 | truncated_p = 1; | |
4360 | } | |
4361 | else | |
4362 | { | |
4363 | int nrows_copied = (r->desired_vpos + r->nrows | |
4364 | - p->desired_vpos); | |
4365 | ||
4366 | if (p->nrows <= nrows_copied) | |
4367 | p->nrows = 0; | |
4368 | else | |
4369 | { | |
4370 | int height_copied = (r->desired_y + r->height | |
4371 | - p->desired_y); | |
4372 | ||
4373 | p->current_vpos += nrows_copied; | |
4374 | p->desired_vpos += nrows_copied; | |
4375 | p->nrows -= nrows_copied; | |
4376 | p->current_y += height_copied; | |
4377 | p->desired_y += height_copied; | |
4378 | p->height -= height_copied; | |
4379 | truncated_p = 1; | |
4380 | } | |
4381 | } | |
4382 | } | |
177c0ea7 | 4383 | |
1305621b YM |
4384 | if (r->current_y != r->desired_y |
4385 | /* The condition below is equivalent to | |
4386 | ((p->current_y >= r->desired_y | |
5f5c8ee5 | 4387 | && p->current_y < r->desired_y + r->height) |
1305621b | 4388 | || (p->current_y + p->height > r->desired_y |
5f5c8ee5 | 4389 | && (p->current_y + p->height |
1305621b YM |
4390 | <= r->desired_y + r->height))) |
4391 | because we have 0 < p->height <= r->height. */ | |
4392 | && p->current_y < r->desired_y + r->height | |
4393 | && p->current_y + p->height > r->desired_y) | |
4394 | p->nrows = 0; | |
4395 | ||
4396 | /* Reorder runs by copied pixel lines if truncated. */ | |
4397 | if (truncated_p && p->nrows > 0) | |
4398 | { | |
4399 | int k = nruns - 1; | |
4400 | ||
4401 | while (runs[k]->nrows == 0 || runs[k]->height < p->height) | |
4402 | k--; | |
4403 | memmove (runs + j, runs + j + 1, (k - j) * sizeof (*runs)); | |
4404 | runs[k] = p; | |
5f5c8ee5 GM |
4405 | } |
4406 | } | |
ea0d86af | 4407 | |
5f5c8ee5 GM |
4408 | /* Assign matrix rows. */ |
4409 | for (j = 0; j < r->nrows; ++j) | |
4410 | { | |
4411 | struct glyph_row *from, *to; | |
59ea14cd | 4412 | bool to_overlapped_p; |
e876ff42 | 4413 | |
5f5c8ee5 GM |
4414 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
4415 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 4416 | to_overlapped_p = to->overlapped_p; |
e61124cd | 4417 | from->redraw_fringe_bitmaps_p = from->fringe_bitmap_periodic_p; |
5f5c8ee5 | 4418 | assign_row (to, from); |
1305621b YM |
4419 | /* The above `assign_row' actually does swap, so if we had |
4420 | an overlap in the copy destination of two runs, then | |
4421 | the second run would assign a previously disabled bogus | |
4422 | row. But thanks to the truncation code in the | |
4423 | preceding for-loop, we no longer have such an overlap, | |
4424 | and thus the assigned row should always be enabled. */ | |
a54e2c05 | 4425 | eassert (to->enabled_p); |
1305621b | 4426 | from->enabled_p = 0; |
408f5064 | 4427 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
4428 | } |
4429 | } | |
15874c59 | 4430 | |
6df5d75f GM |
4431 | /* Clear the hash table, for the next time. */ |
4432 | for (i = 0; i < row_entry_idx; ++i) | |
4433 | row_table[row_entry_pool[i].bucket] = NULL; | |
4434 | ||
aec1708a | 4435 | /* Value is 1 to indicate that we scrolled the display. */ |
908589fd | 4436 | return nruns > 0; |
5f5c8ee5 | 4437 | } |
de83c314 | 4438 | |
15874c59 | 4439 | |
4588ec20 | 4440 | \f |
5f5c8ee5 GM |
4441 | /************************************************************************ |
4442 | Frame-Based Updates | |
4443 | ************************************************************************/ | |
4588ec20 | 4444 | |
5f5c8ee5 | 4445 | /* Update the desired frame matrix of frame F. |
4588ec20 | 4446 | |
59ea14cd PE |
4447 | FORCE_P means that the update should not be stopped by pending input. |
4448 | INHIBIT_HAIRY_ID_P means that scrolling should not be tried. | |
5f5c8ee5 | 4449 | |
59ea14cd | 4450 | Value is true if update was stopped due to pending input. */ |
5f5c8ee5 | 4451 | |
59ea14cd PE |
4452 | static bool |
4453 | update_frame_1 (struct frame *f, bool force_p, bool inhibit_id_p) | |
4588ec20 | 4454 | { |
5f5c8ee5 GM |
4455 | /* Frame matrices to work on. */ |
4456 | struct glyph_matrix *current_matrix = f->current_matrix; | |
4457 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
4458 | int i; | |
59ea14cd | 4459 | bool pause_p; |
4588ec20 | 4460 | int preempt_count = baud_rate / 2400 + 1; |
5f5c8ee5 | 4461 | |
a54e2c05 | 4462 | eassert (current_matrix && desired_matrix); |
4588ec20 | 4463 | |
c37e4889 RS |
4464 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
4465 | calculate_costs (f); | |
4466 | ||
d88c2b9e RS |
4467 | if (preempt_count <= 0) |
4468 | preempt_count = 1; | |
4469 | ||
a2130dbb | 4470 | if (!force_p && detect_input_pending_ignore_squeezables ()) |
4588ec20 | 4471 | { |
27786b2f | 4472 | pause_p = 1; |
4588ec20 JB |
4473 | goto do_pause; |
4474 | } | |
4475 | ||
5f5c8ee5 | 4476 | /* If we cannot insert/delete lines, it's no use trying it. */ |
daf01701 | 4477 | if (!FRAME_LINE_INS_DEL_OK (f)) |
5f5c8ee5 | 4478 | inhibit_id_p = 1; |
7098a0fa | 4479 | |
efb859b4 | 4480 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
4481 | i/d line if just want cursor motion. */ |
4482 | for (i = 0; i < desired_matrix->nrows; i++) | |
4483 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
4484 | break; |
4485 | ||
4486 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
4487 | if (!inhibit_id_p && i < desired_matrix->nrows) |
4488 | force_p |= scrolling (f); | |
4588ec20 JB |
4489 | |
4490 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
4491 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
4492 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 4493 | |
5f5c8ee5 GM |
4494 | /* Now update the rest of the lines. */ |
4495 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 4496 | { |
5f5c8ee5 | 4497 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 4498 | { |
b6a65ac2 | 4499 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
4500 | { |
4501 | /* Flush out every so many lines. | |
4502 | Also flush out if likely to have more than 1k buffered | |
4503 | otherwise. I'm told that some telnet connections get | |
4504 | really screwed by more than 1k output at once. */ | |
fced92f1 CY |
4505 | FILE *display_output = FRAME_TTY (f)->output; |
4506 | if (display_output) | |
4588ec20 | 4507 | { |
8148369c | 4508 | ptrdiff_t outq = __fpending (display_output); |
fced92f1 CY |
4509 | if (outq > 900 |
4510 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
06b63c9b | 4511 | fflush (display_output); |
4588ec20 | 4512 | } |
4588ec20 JB |
4513 | } |
4514 | ||
d012c62b | 4515 | if (!force_p && (i - 1) % preempt_count == 0) |
a2d5fca0 | 4516 | detect_input_pending_ignore_squeezables (); |
a2960116 | 4517 | |
5f5c8ee5 | 4518 | update_frame_line (f, i); |
4588ec20 | 4519 | } |
4588ec20 | 4520 | } |
177c0ea7 | 4521 | |
7216e43b | 4522 | lint_assume (0 <= FRAME_LINES (f)); |
59ea14cd | 4523 | pause_p = 0 < i && i < FRAME_LINES (f) - 1; |
4588ec20 JB |
4524 | |
4525 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
27786b2f | 4526 | if (!pause_p) |
4588ec20 | 4527 | { |
48cf7030 | 4528 | if ((cursor_in_echo_area |
5f5c8ee5 | 4529 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 4530 | show the cursor for the message instead of for the |
5f5c8ee5 | 4531 | (now hidden) mini-buffer contents. */ |
2577053b RS |
4532 | || (EQ (minibuf_window, selected_window) |
4533 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 4534 | && !NILP (echo_area_buffer[0]))) |
2577053b | 4535 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 4536 | the active mini-buffer window. */ |
2577053b | 4537 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 4538 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 4539 | { |
7df02016 | 4540 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
4541 | int row, col; |
4542 | ||
4543 | if (cursor_in_echo_area < 0) | |
4544 | { | |
5f5c8ee5 GM |
4545 | /* Negative value of cursor_in_echo_area means put |
4546 | cursor at beginning of line. */ | |
648fa17d JB |
4547 | row = top; |
4548 | col = 0; | |
4549 | } | |
1113d9db | 4550 | else |
648fa17d | 4551 | { |
5f5c8ee5 GM |
4552 | /* Positive value of cursor_in_echo_area means put |
4553 | cursor at the end of the prompt. If the mini-buffer | |
4554 | is several lines high, find the last line that has | |
4555 | any text on it. */ | |
7df02016 | 4556 | row = FRAME_LINES (f); |
177c0ea7 | 4557 | do |
648fa17d | 4558 | { |
5f5c8ee5 GM |
4559 | --row; |
4560 | col = 0; | |
177c0ea7 | 4561 | |
5f5c8ee5 GM |
4562 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
4563 | { | |
4564 | /* Frame rows are filled up with spaces that | |
4565 | must be ignored here. */ | |
5f5c8ee5 GM |
4566 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
4567 | row); | |
4568 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
4569 | struct glyph *last = start + r->used[TEXT_AREA]; | |
4570 | ||
4571 | while (last > start | |
4572 | && (last - 1)->charpos < 0) | |
4573 | --last; | |
177c0ea7 | 4574 | |
5f5c8ee5 GM |
4575 | col = last - start; |
4576 | } | |
648fa17d JB |
4577 | } |
4578 | while (row > top && col == 0); | |
4579 | ||
6395da5c | 4580 | /* Make sure COL is not out of range. */ |
868e640e | 4581 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 4582 | { |
6395da5c | 4583 | /* If we have another row, advance cursor into it. */ |
7df02016 | 4584 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 4585 | { |
7df02016 | 4586 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
4587 | row++; |
4588 | } | |
4589 | /* Otherwise move it back in range. */ | |
4590 | else | |
868e640e | 4591 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
4592 | } |
4593 | } | |
4594 | ||
385ed61f | 4595 | cursor_to (f, row, col); |
1113d9db | 4596 | } |
4588ec20 | 4597 | else |
5f5c8ee5 GM |
4598 | { |
4599 | /* We have only one cursor on terminal frames. Use it to | |
4600 | display the cursor of the selected window. */ | |
4601 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
4602 | if (w->cursor.vpos >= 0 |
4603 | /* The cursor vpos may be temporarily out of bounds | |
4604 | in the following situation: There is one window, | |
4605 | with the cursor in the lower half of it. The window | |
4606 | is split, and a message causes a redisplay before | |
4607 | a new cursor position has been computed. */ | |
7df02016 | 4608 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
4609 | { |
4610 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
4611 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
4612 | ||
d3d50620 DA |
4613 | if (INTEGERP (w->left_margin_cols)) |
4614 | x += XFASTINT (w->left_margin_cols); | |
177c0ea7 | 4615 | |
7df02016 | 4616 | /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */ |
385ed61f | 4617 | cursor_to (f, y, x); |
5f5c8ee5 GM |
4618 | } |
4619 | } | |
4588ec20 JB |
4620 | } |
4621 | ||
4588ec20 JB |
4622 | do_pause: |
4623 | ||
5f5c8ee5 | 4624 | clear_desired_matrices (f); |
27786b2f | 4625 | return pause_p; |
4588ec20 JB |
4626 | } |
4627 | ||
4588ec20 | 4628 | |
5f5c8ee5 | 4629 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 4630 | |
59ea14cd | 4631 | static bool |
971de7fb | 4632 | scrolling (struct frame *frame) |
4588ec20 JB |
4633 | { |
4634 | int unchanged_at_top, unchanged_at_bottom; | |
4635 | int window_size; | |
4636 | int changed_lines; | |
38182d90 PE |
4637 | int *old_hash = alloca (FRAME_LINES (frame) * sizeof (int)); |
4638 | int *new_hash = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4639 | int *draw_cost = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4640 | int *old_draw_cost = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 4641 | register int i; |
7df02016 | 4642 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
4643 | struct glyph_matrix *current_matrix = frame->current_matrix; |
4644 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 4645 | |
5f5c8ee5 | 4646 | if (!current_matrix) |
1088b922 | 4647 | emacs_abort (); |
4588ec20 | 4648 | |
5f5c8ee5 GM |
4649 | /* Compute hash codes of all the lines. Also calculate number of |
4650 | changed lines, number of unchanged lines at the beginning, and | |
4651 | number of unchanged lines at the end. */ | |
4588ec20 JB |
4652 | changed_lines = 0; |
4653 | unchanged_at_top = 0; | |
7df02016 KS |
4654 | unchanged_at_bottom = FRAME_LINES (frame); |
4655 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
4656 | { |
4657 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 4658 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 4659 | return 0; |
5f5c8ee5 GM |
4660 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
4661 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
4662 | { |
4663 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
4664 | new_hash[i] = old_hash[i]; | |
4665 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
4666 | draw_cost[i] = INFINITY; | |
4667 | } | |
4588ec20 | 4668 | else |
f188b3c4 | 4669 | { |
5f5c8ee5 GM |
4670 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
4671 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 4672 | } |
4588ec20 JB |
4673 | |
4674 | if (old_hash[i] != new_hash[i]) | |
4675 | { | |
4676 | changed_lines++; | |
7df02016 | 4677 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
4678 | } |
4679 | else if (i == unchanged_at_top) | |
4680 | unchanged_at_top++; | |
5f5c8ee5 | 4681 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
4682 | } |
4683 | ||
4684 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
daf01701 | 4685 | if ((!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4686 | && changed_lines < baud_rate / 2400) |
7df02016 | 4687 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
4688 | return 1; |
4689 | ||
7df02016 | 4690 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
4691 | - unchanged_at_bottom); |
4692 | ||
daf01701 | 4693 | if (FRAME_SCROLL_REGION_OK (frame)) |
4588ec20 | 4694 | free_at_end_vpos -= unchanged_at_bottom; |
daf01701 | 4695 | else if (FRAME_MEMORY_BELOW_FRAME (frame)) |
4588ec20 JB |
4696 | free_at_end_vpos = -1; |
4697 | ||
4698 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 4699 | current frame and desired frame, don't bother with i/d calc. */ |
daf01701 | 4700 | if (!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4701 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
4702 | && (window_size >= |
4703 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 4704 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
4705 | old_hash, new_hash, draw_cost))) |
4706 | return 0; | |
4707 | ||
5f5c8ee5 GM |
4708 | if (window_size < 2) |
4709 | return 0; | |
4710 | ||
502b9b64 | 4711 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 4712 | draw_cost + unchanged_at_top - 1, |
190bb91a | 4713 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
4714 | old_hash + unchanged_at_top - 1, |
4715 | new_hash + unchanged_at_top - 1, | |
4716 | free_at_end_vpos - unchanged_at_top); | |
4717 | ||
4718 | return 0; | |
4719 | } | |
4588ec20 | 4720 | |
4588ec20 | 4721 | |
5f5c8ee5 GM |
4722 | /* Count the number of blanks at the start of the vector of glyphs R |
4723 | which is LEN glyphs long. */ | |
4588ec20 | 4724 | |
4588ec20 | 4725 | static int |
971de7fb | 4726 | count_blanks (struct glyph *r, int len) |
4588ec20 | 4727 | { |
5f5c8ee5 | 4728 | int i; |
177c0ea7 | 4729 | |
5f5c8ee5 GM |
4730 | for (i = 0; i < len; ++i) |
4731 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
4732 | break; | |
4733 | ||
4734 | return i; | |
4588ec20 JB |
4735 | } |
4736 | ||
5f5c8ee5 GM |
4737 | |
4738 | /* Count the number of glyphs in common at the start of the glyph | |
4739 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
4740 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
4741 | ||
4588ec20 | 4742 | static int |
971de7fb | 4743 | count_match (struct glyph *str1, struct glyph *end1, struct glyph *str2, struct glyph *end2) |
4588ec20 | 4744 | { |
5f5c8ee5 GM |
4745 | struct glyph *p1 = str1; |
4746 | struct glyph *p2 = str2; | |
177c0ea7 | 4747 | |
5f5c8ee5 GM |
4748 | while (p1 < end1 |
4749 | && p2 < end2 | |
42186983 | 4750 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 4751 | ++p1, ++p2; |
177c0ea7 | 4752 | |
5f5c8ee5 | 4753 | return p1 - str1; |
4588ec20 JB |
4754 | } |
4755 | ||
5f5c8ee5 | 4756 | |
4588ec20 | 4757 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 4758 | |
5e617bc2 | 4759 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS ((f))]) |
4588ec20 | 4760 | |
5f5c8ee5 GM |
4761 | |
4762 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
4763 | ||
4588ec20 | 4764 | static void |
971de7fb | 4765 | update_frame_line (struct frame *f, int vpos) |
4588ec20 | 4766 | { |
5f5c8ee5 | 4767 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
4768 | int tem; |
4769 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
4770 | struct glyph_matrix *current_matrix = f->current_matrix; |
4771 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
4772 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
4773 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
59ea14cd PE |
4774 | bool must_write_whole_line_p; |
4775 | bool write_spaces_p = FRAME_MUST_WRITE_SPACES (f); | |
4776 | bool colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background | |
4777 | != FACE_TTY_DEFAULT_BG_COLOR); | |
0a894bad GM |
4778 | |
4779 | if (colored_spaces_p) | |
4780 | write_spaces_p = 1; | |
5f5c8ee5 | 4781 | |
26c63686 GM |
4782 | /* Current row not enabled means it has unknown contents. We must |
4783 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
4784 | must_write_whole_line_p = !current_row->enabled_p; |
4785 | if (must_write_whole_line_p) | |
4588ec20 | 4786 | { |
5f5c8ee5 | 4787 | obody = 0; |
4588ec20 JB |
4788 | olen = 0; |
4789 | } | |
4790 | else | |
4791 | { | |
5f5c8ee5 GM |
4792 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
4793 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 4794 | |
4cecaab8 MB |
4795 | /* Ignore trailing spaces, if we can. */ |
4796 | if (!write_spaces_p) | |
4797 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
4798 | olen--; | |
4588ec20 JB |
4799 | } |
4800 | ||
5f5c8ee5 GM |
4801 | current_row->enabled_p = 1; |
4802 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 4803 | |
5f5c8ee5 GM |
4804 | /* If desired line is empty, just clear the line. */ |
4805 | if (!desired_row->enabled_p) | |
4588ec20 JB |
4806 | { |
4807 | nlen = 0; | |
4808 | goto just_erase; | |
4809 | } | |
4810 | ||
5f5c8ee5 GM |
4811 | nbody = desired_row->glyphs[TEXT_AREA]; |
4812 | nlen = desired_row->used[TEXT_AREA]; | |
4813 | nend = nbody + nlen; | |
4814 | ||
4815 | /* If display line has unknown contents, write the whole line. */ | |
4816 | if (must_write_whole_line_p) | |
4817 | { | |
26c63686 | 4818 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 4819 | if (!write_spaces_p) |
74ca462f GM |
4820 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
4821 | --nlen; | |
4822 | ||
26c63686 | 4823 | /* Write the contents of the desired line. */ |
74ca462f | 4824 | if (nlen) |
26c63686 | 4825 | { |
385ed61f KL |
4826 | cursor_to (f, vpos, 0); |
4827 | write_glyphs (f, nbody, nlen); | |
26c63686 | 4828 | } |
177c0ea7 | 4829 | |
26c63686 GM |
4830 | /* Don't call clear_end_of_line if we already wrote the whole |
4831 | line. The cursor will not be at the right margin in that | |
4832 | case but in the line below. */ | |
7df02016 | 4833 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 | 4834 | { |
385ed61f KL |
4835 | cursor_to (f, vpos, nlen); |
4836 | clear_end_of_line (f, FRAME_TOTAL_COLS (f)); | |
26c63686 | 4837 | } |
58827478 GM |
4838 | else |
4839 | /* Make sure we are in the right row, otherwise cursor movement | |
4840 | with cmgoto might use `ch' in the wrong row. */ | |
385ed61f | 4841 | cursor_to (f, vpos, 0); |
177c0ea7 | 4842 | |
5f5c8ee5 GM |
4843 | make_current (desired_matrix, current_matrix, vpos); |
4844 | return; | |
4845 | } | |
4588ec20 JB |
4846 | |
4847 | /* Pretend trailing spaces are not there at all, | |
4848 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
4849 | if (!write_spaces_p) |
4850 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
4851 | nlen--; | |
4588ec20 JB |
4852 | |
4853 | /* If there's no i/d char, quickly do the best we can without it. */ | |
daf01701 | 4854 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
4588ec20 | 4855 | { |
5f5c8ee5 | 4856 | int i, j; |
4588ec20 | 4857 | |
5f5c8ee5 GM |
4858 | /* Find the first glyph in desired row that doesn't agree with |
4859 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
4860 | for (i = 0; i < nlen; i++) |
4861 | { | |
5f5c8ee5 | 4862 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 4863 | { |
5f5c8ee5 GM |
4864 | /* Find the end of the run of different glyphs. */ |
4865 | j = i + 1; | |
4866 | while (j < nlen | |
4867 | && (j >= olen | |
4868 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
4869 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
4870 | ++j; | |
177c0ea7 JB |
4871 | |
4872 | /* Output this run of non-matching chars. */ | |
385ed61f KL |
4873 | cursor_to (f, vpos, i); |
4874 | write_glyphs (f, nbody + i, j - i); | |
5f5c8ee5 | 4875 | i = j - 1; |
4588ec20 JB |
4876 | |
4877 | /* Now find the next non-match. */ | |
4878 | } | |
4879 | } | |
4880 | ||
4881 | /* Clear the rest of the line, or the non-clear part of it. */ | |
4882 | if (olen > nlen) | |
4883 | { | |
385ed61f KL |
4884 | cursor_to (f, vpos, nlen); |
4885 | clear_end_of_line (f, olen); | |
4588ec20 JB |
4886 | } |
4887 | ||
5f5c8ee5 GM |
4888 | /* Make current row = desired row. */ |
4889 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
4890 | return; |
4891 | } | |
4892 | ||
5f5c8ee5 GM |
4893 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
4894 | characters in a row. */ | |
4895 | ||
4588ec20 JB |
4896 | if (!olen) |
4897 | { | |
5f5c8ee5 GM |
4898 | /* If current line is blank, skip over initial spaces, if |
4899 | possible, and write the rest. */ | |
4cecaab8 | 4900 | if (write_spaces_p) |
5f5c8ee5 GM |
4901 | nsp = 0; |
4902 | else | |
4903 | nsp = count_blanks (nbody, nlen); | |
4904 | ||
4588ec20 JB |
4905 | if (nlen > nsp) |
4906 | { | |
385ed61f KL |
4907 | cursor_to (f, vpos, nsp); |
4908 | write_glyphs (f, nbody + nsp, nlen - nsp); | |
4588ec20 JB |
4909 | } |
4910 | ||
502b9b64 | 4911 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 4912 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
4913 | return; |
4914 | } | |
4915 | ||
4588ec20 | 4916 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 4917 | osp = count_blanks (obody, olen); |
4cecaab8 | 4918 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 4919 | |
5f5c8ee5 GM |
4920 | /* Compute number of matching chars starting with first non-blank. */ |
4921 | begmatch = count_match (obody + osp, obody + olen, | |
4922 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
4923 | |
4924 | /* Spaces in new match implicit space past the end of old. */ | |
4925 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 4926 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
4927 | { |
4928 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
4929 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
4930 | ++begmatch; | |
4588ec20 JB |
4931 | } |
4932 | ||
4933 | /* Avoid doing insert/delete char | |
4934 | just cause number of leading spaces differs | |
5f5c8ee5 | 4935 | when the following text does not match. */ |
4588ec20 JB |
4936 | if (begmatch == 0 && osp != nsp) |
4937 | osp = nsp = min (osp, nsp); | |
4938 | ||
4939 | /* Find matching characters at end of line */ | |
4940 | op1 = obody + olen; | |
4941 | np1 = nbody + nlen; | |
4942 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
4943 | while (op1 > op2 |
4944 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
4945 | { |
4946 | op1--; | |
4947 | np1--; | |
4948 | } | |
4949 | endmatch = obody + olen - op1; | |
4950 | ||
4588ec20 JB |
4951 | /* tem gets the distance to insert or delete. |
4952 | endmatch is how many characters we save by doing so. | |
4953 | Is it worth it? */ | |
4954 | ||
4955 | tem = (nlen - nsp) - (olen - osp); | |
4956 | if (endmatch && tem | |
daf01701 | 4957 | && (!FRAME_CHAR_INS_DEL_OK (f) |
8a56675d | 4958 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
4959 | endmatch = 0; |
4960 | ||
4961 | /* nsp - osp is the distance to insert or delete. | |
4962 | If that is nonzero, begmatch is known to be nonzero also. | |
4963 | begmatch + endmatch is how much we save by doing the ins/del. | |
4964 | Is it worth it? */ | |
4965 | ||
4966 | if (nsp != osp | |
daf01701 | 4967 | && (!FRAME_CHAR_INS_DEL_OK (f) |
c363a1d6 | 4968 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
4969 | { |
4970 | begmatch = 0; | |
4971 | endmatch = 0; | |
4972 | osp = nsp = min (osp, nsp); | |
4973 | } | |
4974 | ||
4975 | /* Now go through the line, inserting, writing and | |
4976 | deleting as appropriate. */ | |
4977 | ||
4978 | if (osp > nsp) | |
4979 | { | |
385ed61f KL |
4980 | cursor_to (f, vpos, nsp); |
4981 | delete_glyphs (f, osp - nsp); | |
4588ec20 JB |
4982 | } |
4983 | else if (nsp > osp) | |
4984 | { | |
4985 | /* If going to delete chars later in line | |
4986 | and insert earlier in the line, | |
4987 | must delete first to avoid losing data in the insert */ | |
4988 | if (endmatch && nlen < olen + nsp - osp) | |
4989 | { | |
385ed61f KL |
4990 | cursor_to (f, vpos, nlen - endmatch + osp - nsp); |
4991 | delete_glyphs (f, olen + nsp - osp - nlen); | |
4588ec20 JB |
4992 | olen = nlen - (nsp - osp); |
4993 | } | |
385ed61f KL |
4994 | cursor_to (f, vpos, osp); |
4995 | insert_glyphs (f, 0, nsp - osp); | |
4588ec20 JB |
4996 | } |
4997 | olen += nsp - osp; | |
4998 | ||
4999 | tem = nsp + begmatch + endmatch; | |
5000 | if (nlen != tem || olen != tem) | |
5001 | { | |
4588ec20 JB |
5002 | if (!endmatch || nlen == olen) |
5003 | { | |
c363a1d6 GM |
5004 | /* If new text being written reaches right margin, there is |
5005 | no need to do clear-to-eol at the end of this function | |
5006 | (and it would not be safe, since cursor is not going to | |
5007 | be "at the margin" after the text is done). */ | |
7df02016 | 5008 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 5009 | olen = 0; |
c363a1d6 GM |
5010 | |
5011 | /* Function write_glyphs is prepared to do nothing | |
5012 | if passed a length <= 0. Check it here to avoid | |
5013 | unnecessary cursor movement. */ | |
5014 | if (nlen - tem > 0) | |
5015 | { | |
385ed61f KL |
5016 | cursor_to (f, vpos, nsp + begmatch); |
5017 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
c363a1d6 | 5018 | } |
4588ec20 JB |
5019 | } |
5020 | else if (nlen > olen) | |
5021 | { | |
24e86043 KH |
5022 | /* Here, we used to have the following simple code: |
5023 | ---------------------------------------- | |
5024 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
5025 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
5026 | ---------------------------------------- | |
5027 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
5028 | is a padding glyph. */ | |
5029 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
5030 | int del; | |
5f5c8ee5 | 5031 | |
385ed61f | 5032 | cursor_to (f, vpos, nsp + begmatch); |
177c0ea7 | 5033 | |
5f5c8ee5 | 5034 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
5035 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
5036 | out--; | |
385ed61f | 5037 | write_glyphs (f, nbody + nsp + begmatch, out); |
177c0ea7 | 5038 | |
5f5c8ee5 GM |
5039 | /* If we left columns to be overwritten, we must delete them. */ |
5040 | del = olen - tem - out; | |
c363a1d6 | 5041 | if (del > 0) |
385ed61f | 5042 | delete_glyphs (f, del); |
177c0ea7 | 5043 | |
5f5c8ee5 | 5044 | /* At last, we insert columns not yet written out. */ |
385ed61f | 5045 | insert_glyphs (f, nbody + nsp + begmatch + out, nlen - olen + del); |
5f5c8ee5 GM |
5046 | olen = nlen; |
5047 | } | |
5048 | else if (olen > nlen) | |
5049 | { | |
385ed61f KL |
5050 | cursor_to (f, vpos, nsp + begmatch); |
5051 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
5052 | delete_glyphs (f, olen - nlen); | |
5f5c8ee5 GM |
5053 | olen = nlen; |
5054 | } | |
bd9e3e75 | 5055 | } |
5f5c8ee5 GM |
5056 | |
5057 | just_erase: | |
5058 | /* If any unerased characters remain after the new line, erase them. */ | |
5059 | if (olen > nlen) | |
078b3696 | 5060 | { |
385ed61f KL |
5061 | cursor_to (f, vpos, nlen); |
5062 | clear_end_of_line (f, olen); | |
078b3696 | 5063 | } |
5f5c8ee5 GM |
5064 | |
5065 | /* Exchange contents between current_frame and new_frame. */ | |
5066 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5067 | } |
5f5c8ee5 GM |
5068 | |
5069 | ||
078b3696 | 5070 | \f |
5f5c8ee5 GM |
5071 | /*********************************************************************** |
5072 | X/Y Position -> Buffer Position | |
5073 | ***********************************************************************/ | |
5074 | ||
a1b0a6db | 5075 | /* Determine what's under window-relative pixel position (*X, *Y). |
2396cbba | 5076 | Return the OBJECT (string or buffer) that's there. |
6b61353c | 5077 | Return in *POS the position in that object. |
2396cbba EZ |
5078 | Adjust *X and *Y to character positions. |
5079 | Return in *DX and *DY the pixel coordinates of the click, | |
5080 | relative to the top left corner of OBJECT, or relative to | |
5081 | the top left corner of the character glyph at (*X, *Y) | |
5082 | if OBJECT is nil. | |
5083 | Return WIDTH and HEIGHT of the object at (*X, *Y), or zero | |
5084 | if the coordinates point to an empty area of the display. */ | |
5f5c8ee5 | 5085 | |
6b61353c | 5086 | Lisp_Object |
971de7fb | 5087 | 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 | 5088 | { |
5f5c8ee5 | 5089 | struct it it; |
707ea971 | 5090 | Lisp_Object old_current_buffer = Fcurrent_buffer (); |
5f5c8ee5 | 5091 | struct text_pos startp; |
6b61353c KH |
5092 | Lisp_Object string; |
5093 | struct glyph_row *row; | |
cedd7cd9 KS |
5094 | #ifdef HAVE_WINDOW_SYSTEM |
5095 | struct image *img = 0; | |
5096 | #endif | |
2396cbba | 5097 | int x0, x1, to_x; |
57b3e30b | 5098 | void *itdata = NULL; |
5f5c8ee5 | 5099 | |
707ea971 CY |
5100 | /* We used to set current_buffer directly here, but that does the |
5101 | wrong thing with `face-remapping-alist' (bug#2044). */ | |
e74aeda8 | 5102 | Fset_buffer (w->contents); |
57b3e30b | 5103 | itdata = bidi_shelve_cache (); |
d3d50620 | 5104 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
5f5c8ee5 GM |
5105 | CHARPOS (startp) = min (ZV, max (BEGV, CHARPOS (startp))); |
5106 | BYTEPOS (startp) = min (ZV_BYTE, max (BEGV_BYTE, BYTEPOS (startp))); | |
5107 | start_display (&it, w, startp); | |
352ec8ff EZ |
5108 | /* start_display takes into account the header-line row, but IT's |
5109 | vpos still counts from the glyph row that includes the window's | |
5110 | start position. Adjust for a possible header-line row. */ | |
59ea14cd | 5111 | it.vpos += WINDOW_WANTS_HEADER_LINE_P (w); |
177c0ea7 | 5112 | |
9173a8fb | 5113 | x0 = *x; |
2396cbba EZ |
5114 | |
5115 | /* First, move to the beginning of the row corresponding to *Y. We | |
5116 | need to be in that row to get the correct value of base paragraph | |
40629f17 | 5117 | direction for the text at (*X, *Y). */ |
2396cbba EZ |
5118 | move_it_to (&it, -1, 0, *y, -1, MOVE_TO_X | MOVE_TO_Y); |
5119 | ||
5120 | /* TO_X is the pixel position that the iterator will compute for the | |
40629f17 EZ |
5121 | glyph at *X. We add it.first_visible_x because iterator |
5122 | positions include the hscroll. */ | |
2396cbba EZ |
5123 | to_x = x0 + it.first_visible_x; |
5124 | if (it.bidi_it.paragraph_dir == R2L) | |
5125 | /* For lines in an R2L paragraph, we need to mirror TO_X wrt the | |
5126 | text area. This is because the iterator, even in R2L | |
5127 | paragraphs, delivers glyphs as if they started at the left | |
5128 | margin of the window. (When we actually produce glyphs for | |
5129 | display, we reverse their order in PRODUCE_GLYPHS, but the | |
5130 | iterator doesn't know about that.) The following line adjusts | |
5131 | the pixel position to the iterator geometry, which is what | |
40629f17 EZ |
5132 | move_it_* routines use. (The -1 is because in a window whose |
5133 | text-area width is W, the rightmost pixel position is W-1, and | |
5134 | it should be mirrored into zero pixel position.) */ | |
5135 | to_x = window_box_width (w, TEXT_AREA) - to_x - 1; | |
5136 | ||
5137 | /* Now move horizontally in the row to the glyph under *X. Second | |
5138 | argument is ZV to prevent move_it_in_display_line from matching | |
5139 | based on buffer positions. */ | |
2396cbba | 5140 | move_it_in_display_line (&it, ZV, to_x, MOVE_TO_X); |
35928349 | 5141 | bidi_unshelve_cache (itdata, 0); |
177c0ea7 | 5142 | |
707ea971 | 5143 | Fset_buffer (old_current_buffer); |
a1b0a6db | 5144 | |
6b61353c KH |
5145 | *dx = x0 + it.first_visible_x - it.current_x; |
5146 | *dy = *y - it.current_y; | |
5147 | ||
e74aeda8 | 5148 | string = w->contents; |
6b61353c KH |
5149 | if (STRINGP (it.string)) |
5150 | string = it.string; | |
a1b0a6db | 5151 | *pos = it.current; |
86282aab KH |
5152 | if (it.what == IT_COMPOSITION |
5153 | && it.cmp_it.nchars > 1 | |
5154 | && it.cmp_it.reversed_p) | |
5155 | { | |
5156 | /* The current display element is a grapheme cluster in a | |
5157 | composition. In that case, we need the position of the first | |
5158 | character of the cluster. But, as it.cmp_it.reversed_p is 1, | |
5159 | it.current points to the last character of the cluster, thus | |
5160 | we must move back to the first character of the same | |
5161 | cluster. */ | |
5162 | CHARPOS (pos->pos) -= it.cmp_it.nchars - 1; | |
5163 | if (STRINGP (it.string)) | |
5164 | BYTEPOS (pos->pos) = string_char_to_byte (string, CHARPOS (pos->pos)); | |
5165 | else | |
e74aeda8 | 5166 | BYTEPOS (pos->pos) = buf_charpos_to_bytepos (XBUFFER (w->contents), |
425cc014 | 5167 | CHARPOS (pos->pos)); |
86282aab | 5168 | } |
6b61353c KH |
5169 | |
5170 | #ifdef HAVE_WINDOW_SYSTEM | |
5171 | if (it.what == IT_IMAGE) | |
5172 | { | |
6b61353c KH |
5173 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5174 | && !NILP (img->spec)) | |
5175 | *object = img->spec; | |
5176 | } | |
5177 | #endif | |
5178 | ||
b70d98e1 KS |
5179 | if (it.vpos < w->current_matrix->nrows |
5180 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5181 | row->enabled_p)) | |
6b61353c KH |
5182 | { |
5183 | if (it.hpos < row->used[TEXT_AREA]) | |
5184 | { | |
5185 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6b61353c | 5186 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5187 | if (img) |
5188 | { | |
5189 | *dy -= row->ascent - glyph->ascent; | |
4be9765d KH |
5190 | *dx += glyph->slice.img.x; |
5191 | *dy += glyph->slice.img.y; | |
cedd7cd9 KS |
5192 | /* Image slices positions are still relative to the entire image */ |
5193 | *width = img->width; | |
5194 | *height = img->height; | |
5195 | } | |
5196 | else | |
6b61353c | 5197 | #endif |
cedd7cd9 KS |
5198 | { |
5199 | *width = glyph->pixel_width; | |
5200 | *height = glyph->ascent + glyph->descent; | |
5201 | } | |
6b61353c KH |
5202 | } |
5203 | else | |
5204 | { | |
5205 | *width = 0; | |
5206 | *height = row->height; | |
5207 | } | |
5208 | } | |
5209 | else | |
5210 | { | |
5211 | *width = *height = 0; | |
5212 | } | |
5213 | ||
5214 | /* Add extra (default width) columns if clicked after EOL. */ | |
5e617bc2 | 5215 | x1 = max (0, it.current_x + it.pixel_width - it.first_visible_x); |
6b61353c KH |
5216 | if (x0 > x1) |
5217 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5218 | ||
5219 | *x = it.hpos; | |
5220 | *y = it.vpos; | |
5221 | ||
5222 | return string; | |
5f5c8ee5 | 5223 | } |
4588ec20 | 5224 | |
5f5c8ee5 GM |
5225 | |
5226 | /* Value is the string under window-relative coordinates X/Y in the | |
6b61353c KH |
5227 | mode line or header line (PART says which) of window W, or nil if none. |
5228 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
5229 | |
5230 | Lisp_Object | |
ace1712c | 5231 | mode_line_string (struct window *w, enum window_part part, |
d311d28c | 5232 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5233 | int *dx, int *dy, int *width, int *height) |
5f5c8ee5 GM |
5234 | { |
5235 | struct glyph_row *row; | |
5236 | struct glyph *glyph, *end; | |
6b61353c | 5237 | int x0, y0; |
5f5c8ee5 GM |
5238 | Lisp_Object string = Qnil; |
5239 | ||
641bdbf3 | 5240 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
5241 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
5242 | else | |
045dee35 | 5243 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
6b61353c KH |
5244 | y0 = *y - row->y; |
5245 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
5f5c8ee5 GM |
5246 | |
5247 | if (row->mode_line_p && row->enabled_p) | |
4588ec20 | 5248 | { |
5f5c8ee5 GM |
5249 | /* Find the glyph under X. If we find one with a string object, |
5250 | it's the one we were looking for. */ | |
5251 | glyph = row->glyphs[TEXT_AREA]; | |
5252 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 5253 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5254 | x0 -= glyph->pixel_width; |
5255 | *x = glyph - row->glyphs[TEXT_AREA]; | |
5256 | if (glyph < end) | |
5257 | { | |
5258 | string = glyph->object; | |
5259 | *charpos = glyph->charpos; | |
5260 | *width = glyph->pixel_width; | |
5261 | *height = glyph->ascent + glyph->descent; | |
5262 | #ifdef HAVE_WINDOW_SYSTEM | |
5263 | if (glyph->type == IMAGE_GLYPH) | |
5264 | { | |
5265 | struct image *img; | |
5266 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5267 | if (img != NULL) | |
5268 | *object = img->spec; | |
5269 | y0 -= row->ascent - glyph->ascent; | |
5270 | } | |
5271 | #endif | |
5272 | } | |
5273 | else | |
5274 | { | |
5275 | /* Add extra (default width) columns if clicked after EOL. */ | |
5276 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5277 | *width = 0; | |
5278 | *height = row->height; | |
5279 | } | |
5280 | } | |
5281 | else | |
5282 | { | |
5283 | *x = 0; | |
5284 | x0 = 0; | |
5285 | *width = *height = 0; | |
4588ec20 | 5286 | } |
5f5c8ee5 | 5287 | |
6b61353c KH |
5288 | *dx = x0; |
5289 | *dy = y0; | |
5290 | ||
5f5c8ee5 | 5291 | return string; |
4588ec20 | 5292 | } |
5f5c8ee5 GM |
5293 | |
5294 | ||
db1db309 GM |
5295 | /* Value is the string under window-relative coordinates X/Y in either |
5296 | marginal area, or nil if none. *CHARPOS is set to the position in | |
5297 | the string returned. */ | |
5298 | ||
5299 | Lisp_Object | |
ace1712c | 5300 | marginal_area_string (struct window *w, enum window_part part, |
d311d28c | 5301 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5302 | int *dx, int *dy, int *width, int *height) |
db1db309 GM |
5303 | { |
5304 | struct glyph_row *row = w->current_matrix->rows; | |
5305 | struct glyph *glyph, *end; | |
6b61353c | 5306 | int x0, y0, i, wy = *y; |
641bdbf3 | 5307 | int area; |
db1db309 GM |
5308 | Lisp_Object string = Qnil; |
5309 | ||
641bdbf3 | 5310 | if (part == ON_LEFT_MARGIN) |
db1db309 | 5311 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 5312 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
5313 | area = RIGHT_MARGIN_AREA; |
5314 | else | |
1088b922 | 5315 | emacs_abort (); |
db1db309 GM |
5316 | |
5317 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
5318 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
5319 | break; | |
6b61353c KH |
5320 | y0 = *y - row->y; |
5321 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
db1db309 GM |
5322 | |
5323 | if (row->enabled_p) | |
5324 | { | |
5325 | /* Find the glyph under X. If we find one with a string object, | |
5326 | it's the one we were looking for. */ | |
db1db309 | 5327 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 5328 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5329 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5330 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) |
5331 | + window_box_width (w, LEFT_MARGIN_AREA) | |
5332 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 5333 | else |
7df02016 | 5334 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5335 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5336 | : 0); |
5337 | ||
6b61353c KH |
5338 | glyph = row->glyphs[area]; |
5339 | end = glyph + row->used[area]; | |
cfde341f | 5340 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5341 | x0 -= glyph->pixel_width; |
5342 | *x = glyph - row->glyphs[area]; | |
5343 | if (glyph < end) | |
5344 | { | |
5345 | string = glyph->object; | |
5346 | *charpos = glyph->charpos; | |
5347 | *width = glyph->pixel_width; | |
5348 | *height = glyph->ascent + glyph->descent; | |
5349 | #ifdef HAVE_WINDOW_SYSTEM | |
5350 | if (glyph->type == IMAGE_GLYPH) | |
5351 | { | |
5352 | struct image *img; | |
5353 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5354 | if (img != NULL) | |
5355 | *object = img->spec; | |
5356 | y0 -= row->ascent - glyph->ascent; | |
4be9765d KH |
5357 | x0 += glyph->slice.img.x; |
5358 | y0 += glyph->slice.img.y; | |
6b61353c KH |
5359 | } |
5360 | #endif | |
5361 | } | |
5362 | else | |
5363 | { | |
5364 | /* Add extra (default width) columns if clicked after EOL. */ | |
5365 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5366 | *width = 0; | |
5367 | *height = row->height; | |
5368 | } | |
db1db309 | 5369 | } |
6b61353c KH |
5370 | else |
5371 | { | |
5372 | x0 = 0; | |
5373 | *x = 0; | |
5374 | *width = *height = 0; | |
5375 | } | |
5376 | ||
5377 | *dx = x0; | |
5378 | *dy = y0; | |
db1db309 GM |
5379 | |
5380 | return string; | |
5381 | } | |
5382 | ||
5383 | ||
5f5c8ee5 GM |
5384 | /*********************************************************************** |
5385 | Changing Frame Sizes | |
5386 | ***********************************************************************/ | |
4588ec20 JB |
5387 | |
5388 | #ifdef SIGWINCH | |
5f5c8ee5 | 5389 | |
20ef56db PE |
5390 | static void deliver_window_change_signal (int); |
5391 | ||
9af30bdf | 5392 | static void |
20ef56db | 5393 | handle_window_change_signal (int sig) |
4588ec20 JB |
5394 | { |
5395 | int width, height; | |
28d7d09f | 5396 | struct tty_display_info *tty; |
4d553a13 | 5397 | |
9628b887 KL |
5398 | /* The frame size change obviously applies to a single |
5399 | termcap-controlled terminal, but we can't decide which. | |
5400 | Therefore, we resize the frames corresponding to each tty. | |
9628b887 KL |
5401 | */ |
5402 | for (tty = tty_list; tty; tty = tty->next) { | |
4588ec20 | 5403 | |
0a125897 KL |
5404 | if (! tty->term_initted) |
5405 | continue; | |
4588ec20 | 5406 | |
db878925 DN |
5407 | /* Suspended tty frames have tty->input == NULL avoid trying to |
5408 | use it. */ | |
5409 | if (!tty->input) | |
5410 | continue; | |
5411 | ||
0b0d3e0b | 5412 | get_tty_size (fileno (tty->input), &width, &height); |
3fc809e2 | 5413 | |
bedeffcf | 5414 | if (width > 5 && height > 2) { |
9628b887 | 5415 | Lisp_Object tail, frame; |
3fc809e2 | 5416 | |
9628b887 | 5417 | FOR_EACH_FRAME (tail, frame) |
4d553a13 KL |
5418 | if (FRAME_TERMCAP_P (XFRAME (frame)) && FRAME_TTY (XFRAME (frame)) == tty) |
5419 | /* Record the new sizes, but don't reallocate the data | |
5420 | structures now. Let that be done later outside of the | |
5421 | signal handler. */ | |
5422 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); | |
9628b887 | 5423 | } |
4588ec20 | 5424 | } |
20ef56db | 5425 | } |
3fc809e2 | 5426 | |
20ef56db PE |
5427 | static void |
5428 | deliver_window_change_signal (int sig) | |
5429 | { | |
4d7e6e51 | 5430 | deliver_process_signal (sig, handle_window_change_signal); |
4588ec20 JB |
5431 | } |
5432 | #endif /* SIGWINCH */ | |
5433 | ||
5434 | ||
59ea14cd PE |
5435 | /* Do any change in frame size that was requested by a signal. |
5436 | SAFE means this function is called from a place where it is | |
5437 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 5438 | |
dfcf069d | 5439 | void |
59ea14cd | 5440 | do_pending_window_change (bool safe) |
4588ec20 | 5441 | { |
20ef56db | 5442 | /* If window change signal handler should have run before, run it now. */ |
b96fd3e8 GM |
5443 | if (redisplaying_p && !safe) |
5444 | return; | |
177c0ea7 | 5445 | |
4588ec20 JB |
5446 | while (delayed_size_change) |
5447 | { | |
35f56f96 | 5448 | Lisp_Object tail, frame; |
4588ec20 JB |
5449 | |
5450 | delayed_size_change = 0; | |
5451 | ||
35f56f96 | 5452 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5453 | { |
5f5c8ee5 | 5454 | struct frame *f = XFRAME (frame); |
35f56f96 | 5455 | |
7df02016 KS |
5456 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
5457 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
5458 | 0, 0, safe); | |
4588ec20 JB |
5459 | } |
5460 | } | |
5461 | } | |
5462 | ||
5463 | ||
502b9b64 | 5464 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 5465 | indicate no change is to take place. |
4588ec20 | 5466 | |
59ea14cd PE |
5467 | If DELAY, assume we're being called from a signal handler, and |
5468 | queue the change for later - perhaps the next redisplay. | |
5469 | Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
5470 | from a signal handler. |
5471 | ||
59ea14cd | 5472 | SAFE means this function is called from a place where it's |
b96fd3e8 | 5473 | safe to change frame sizes while a redisplay is in progress. */ |
b6a65ac2 | 5474 | |
dfcf069d | 5475 | void |
59ea14cd PE |
5476 | change_frame_size (struct frame *f, int newheight, int newwidth, |
5477 | bool pretend, bool delay, bool safe) | |
45140e01 RS |
5478 | { |
5479 | Lisp_Object tail, frame; | |
3826ea1a | 5480 | |
9628b887 | 5481 | if (FRAME_MSDOS_P (f)) |
45140e01 | 5482 | { |
9628b887 KL |
5483 | /* On MS-DOS, all frames use the same screen, so a change in |
5484 | size affects all frames. Termcap now supports multiple | |
5485 | ttys. */ | |
45140e01 | 5486 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 5487 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 5488 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 5489 | pretend, delay, safe); |
45140e01 RS |
5490 | } |
5491 | else | |
b96fd3e8 | 5492 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
5493 | } |
5494 | ||
5495 | static void | |
59ea14cd PE |
5496 | change_frame_size_1 (struct frame *f, int newheight, int newwidth, |
5497 | bool pretend, bool delay, bool safe) | |
4588ec20 | 5498 | { |
7df02016 | 5499 | int new_frame_total_cols; |
d311d28c | 5500 | ptrdiff_t count = SPECPDL_INDEX (); |
3826ea1a | 5501 | |
4588ec20 | 5502 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 5503 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 5504 | { |
7df02016 KS |
5505 | f->new_text_lines = newheight; |
5506 | f->new_text_cols = newwidth; | |
4588ec20 JB |
5507 | delayed_size_change = 1; |
5508 | return; | |
5509 | } | |
5510 | ||
502b9b64 | 5511 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
5512 | f->new_text_lines = 0; |
5513 | f->new_text_cols = 0; | |
b6a65ac2 | 5514 | |
08f7aa3e | 5515 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 5516 | if (newheight == 0) |
7df02016 | 5517 | newheight = FRAME_LINES (f); |
ae19c6f2 | 5518 | if (newwidth == 0) |
7df02016 | 5519 | newwidth = FRAME_COLS (f); |
3826ea1a | 5520 | |
3b95a6f9 | 5521 | /* Compute width of windows in F. */ |
b6a65ac2 | 5522 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 5523 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 | 5524 | |
3b95a6f9 MR |
5525 | /* This is the width of the frame with vertical scroll bars and fringe |
5526 | columns. Do this after rounding - see discussion of bug#9723. */ | |
5527 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); | |
5528 | ||
b6a65ac2 | 5529 | /* If we're not changing the frame size, quit now. */ |
3b95a6f9 MR |
5530 | /* Frame width may be unchanged but the text portion may change, for |
5531 | example, fullscreen and remove/add scroll bar. */ | |
7df02016 | 5532 | if (newheight == FRAME_LINES (f) |
3b95a6f9 MR |
5533 | /* Text portion unchanged? */ |
5534 | && newwidth == FRAME_COLS (f) | |
5535 | /* Frame width unchanged? */ | |
5536 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) | |
4588ec20 JB |
5537 | return; |
5538 | ||
4d7e6e51 | 5539 | block_input (); |
cbb95688 | 5540 | |
886a8a6c KH |
5541 | #ifdef MSDOS |
5542 | /* We only can set screen dimensions to certain values supported | |
5543 | by our video hardware. Try to find the smallest size greater | |
5544 | or equal to the requested dimensions. */ | |
5545 | dos_set_window_size (&newheight, &newwidth); | |
5546 | #endif | |
5547 | ||
7df02016 | 5548 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 5549 | { |
562dd5e9 | 5550 | resize_frame_windows (f, newheight, 0); |
b6a65ac2 | 5551 | |
48e482e6 EZ |
5552 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5553 | manipulating video hardware. */ | |
5554 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5555 | FrameRows (FRAME_TTY (f)) = newheight; |
4588ec20 JB |
5556 | } |
5557 | ||
7df02016 | 5558 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 5559 | { |
562dd5e9 | 5560 | resize_frame_windows (f, new_frame_total_cols, 1); |
4588ec20 | 5561 | |
48e482e6 EZ |
5562 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5563 | manipulating video hardware. */ | |
5564 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5565 | FrameCols (FRAME_TTY (f)) = newwidth; |
5f5c8ee5 | 5566 | |
e69b0960 | 5567 | if (WINDOWP (f->tool_bar_window)) |
5f24fa51 | 5568 | XWINDOW (f->tool_bar_window)->total_cols = newwidth; |
4588ec20 JB |
5569 | } |
5570 | ||
7df02016 KS |
5571 | FRAME_LINES (f) = newheight; |
5572 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 5573 | |
5f5c8ee5 GM |
5574 | { |
5575 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
5576 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 5577 | |
5f5c8ee5 GM |
5578 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
5579 | &text_area_height); | |
5580 | if (w->cursor.x >= text_area_x + text_area_width) | |
5581 | w->cursor.hpos = w->cursor.x = 0; | |
5582 | if (w->cursor.y >= text_area_y + text_area_height) | |
5583 | w->cursor.vpos = w->cursor.y = 0; | |
5584 | } | |
986e61b8 | 5585 | |
5f5c8ee5 | 5586 | adjust_glyphs (f); |
5f5c8ee5 | 5587 | calculate_costs (f); |
cb02fa39 GM |
5588 | SET_FRAME_GARBAGED (f); |
5589 | f->resized_p = 1; | |
97cf50e7 | 5590 | |
4d7e6e51 | 5591 | unblock_input (); |
61730a69 | 5592 | |
66322887 | 5593 | record_unwind_current_buffer (); |
e523f7e5 | 5594 | |
ef264c42 | 5595 | run_window_configuration_change_hook (f); |
e523f7e5 RS |
5596 | |
5597 | unbind_to (count, Qnil); | |
4588ec20 | 5598 | } |
5f5c8ee5 GM |
5599 | |
5600 | ||
4588ec20 | 5601 | \f |
5f5c8ee5 GM |
5602 | /*********************************************************************** |
5603 | Terminal Related Lisp Functions | |
5604 | ***********************************************************************/ | |
5605 | ||
5606 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 5607 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
5608 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
5609 | FILE = nil means just close any termscript file currently open. */) | |
5842a27b | 5610 | (Lisp_Object file) |
5f5c8ee5 | 5611 | { |
0b0d3e0b KL |
5612 | struct tty_display_info *tty; |
5613 | ||
7d2f1216 EZ |
5614 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ()) |
5615 | && ! FRAME_MSDOS_P (SELECTED_FRAME ())) | |
0b0d3e0b KL |
5616 | error ("Current frame is not on a tty device"); |
5617 | ||
5618 | tty = CURTTY (); | |
5619 | ||
5620 | if (tty->termscript != 0) | |
406af475 PE |
5621 | { |
5622 | block_input (); | |
5623 | fclose (tty->termscript); | |
5624 | tty->termscript = 0; | |
5625 | unblock_input (); | |
5626 | } | |
5f5c8ee5 GM |
5627 | |
5628 | if (! NILP (file)) | |
5629 | { | |
5630 | file = Fexpand_file_name (file, Qnil); | |
406af475 | 5631 | tty->termscript = emacs_fopen (SSDATA (file), "w"); |
0b0d3e0b | 5632 | if (tty->termscript == 0) |
a9757f6a | 5633 | report_file_error ("Opening termscript", file); |
5f5c8ee5 GM |
5634 | } |
5635 | return Qnil; | |
5636 | } | |
5637 | ||
5638 | ||
4588ec20 | 5639 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
62af879c | 5640 | Ssend_string_to_terminal, 1, 2, 0, |
7ee72033 | 5641 | doc: /* Send STRING to the terminal without alteration. |
62af879c KL |
5642 | Control characters in STRING will have terminal-dependent effects. |
5643 | ||
6ed8eeff | 5644 | Optional parameter TERMINAL specifies the tty terminal device to use. |
558759e4 AM |
5645 | It may be a terminal object, a frame, or nil for the terminal used by |
5646 | the currently selected frame. In batch mode, STRING is sent to stdout | |
5647 | when TERMINAL is nil. */) | |
5842a27b | 5648 | (Lisp_Object string, Lisp_Object terminal) |
4588ec20 | 5649 | { |
7cef7ce3 SM |
5650 | struct terminal *t = get_terminal (terminal, 1); |
5651 | FILE *out; | |
0b0d3e0b | 5652 | |
94f3db62 | 5653 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 5654 | CHECK_STRING (string); |
4d7e6e51 | 5655 | block_input (); |
0b0d3e0b | 5656 | |
6ed8eeff KL |
5657 | if (!t) |
5658 | error ("Unknown terminal device"); | |
0b0d3e0b | 5659 | |
7cef7ce3 SM |
5660 | if (t->type == output_initial) |
5661 | out = stdout; | |
5662 | else if (t->type != output_termcap && t->type != output_msdos_raw) | |
5663 | error ("Device %d is not a termcap terminal device", t->id); | |
5664 | else | |
5665 | { | |
5666 | struct tty_display_info *tty = t->display_info.tty; | |
3fc809e2 | 5667 | |
7cef7ce3 SM |
5668 | if (! tty->output) |
5669 | error ("Terminal is currently suspended"); | |
cecfdea6 | 5670 | |
7cef7ce3 SM |
5671 | if (tty->termscript) |
5672 | { | |
5673 | fwrite (SDATA (string), 1, SBYTES (string), tty->termscript); | |
5674 | fflush (tty->termscript); | |
5675 | } | |
5676 | out = tty->output; | |
4588ec20 | 5677 | } |
7cef7ce3 SM |
5678 | fwrite (SDATA (string), 1, SBYTES (string), out); |
5679 | fflush (out); | |
4d7e6e51 | 5680 | unblock_input (); |
4588ec20 JB |
5681 | return Qnil; |
5682 | } | |
5683 | ||
5f5c8ee5 | 5684 | |
a7ca3326 | 5685 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 5686 | doc: /* Beep, or flash the screen. |
228299fa | 5687 | Also, unless an argument is given, |
7ee72033 | 5688 | terminate any keyboard macro currently executing. */) |
5842a27b | 5689 | (Lisp_Object arg) |
4588ec20 | 5690 | { |
efb859b4 | 5691 | if (!NILP (arg)) |
4588ec20 | 5692 | { |
7fa788da RS |
5693 | if (noninteractive) |
5694 | putchar (07); | |
5695 | else | |
385ed61f | 5696 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5697 | } |
5698 | else | |
5699 | bitch_at_user (); | |
5700 | ||
5701 | return Qnil; | |
5702 | } | |
5703 | ||
dfcf069d | 5704 | void |
971de7fb | 5705 | bitch_at_user (void) |
4588ec20 JB |
5706 | { |
5707 | if (noninteractive) | |
5708 | putchar (07); | |
5f5c8ee5 | 5709 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
81519fd2 SM |
5710 | { |
5711 | const char *msg | |
5712 | = "Keyboard macro terminated by a command ringing the bell"; | |
6c6f1994 | 5713 | Fsignal (Quser_error, list1 (build_string (msg))); |
81519fd2 | 5714 | } |
4588ec20 | 5715 | else |
385ed61f | 5716 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5717 | } |
5718 | ||
5f5c8ee5 GM |
5719 | |
5720 | \f | |
5721 | /*********************************************************************** | |
5722 | Sleeping, Waiting | |
5723 | ***********************************************************************/ | |
5724 | ||
a7ca3326 | 5725 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 5726 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
5727 | SECONDS may be a floating-point value, meaning that you can wait for a |
5728 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
d35af63c | 5729 | additional wait period, in milliseconds; this is for backwards compatibility. |
7ee72033 | 5730 | \(Not all operating systems support waiting for a fraction of a second.) */) |
5842a27b | 5731 | (Lisp_Object seconds, Lisp_Object milliseconds) |
4588ec20 | 5732 | { |
d311d28c | 5733 | double duration = extract_float (seconds); |
4588ec20 | 5734 | |
d311d28c PE |
5735 | if (!NILP (milliseconds)) |
5736 | { | |
5737 | CHECK_NUMBER (milliseconds); | |
5738 | duration += XINT (milliseconds) / 1000.0; | |
5739 | } | |
b07646f5 | 5740 | |
908589fd | 5741 | if (duration > 0) |
d35af63c PE |
5742 | { |
5743 | EMACS_TIME t = EMACS_TIME_FROM_DOUBLE (duration); | |
f1dd8073 | 5744 | wait_reading_process_output (min (EMACS_SECS (t), WAIT_READING_MAX), |
d35af63c PE |
5745 | EMACS_NSECS (t), 0, 0, Qnil, NULL, 0); |
5746 | } | |
4588ec20 JB |
5747 | |
5748 | return Qnil; | |
5749 | } | |
5750 | ||
5f5c8ee5 | 5751 | |
dcd1ca45 | 5752 | /* This is just like wait_reading_process_output, except that |
902b9b6d | 5753 | it does redisplay. |
f76475ad | 5754 | |
2bcac766 CY |
5755 | TIMEOUT is number of seconds to wait (float or integer), |
5756 | or t to wait forever. | |
59ea14cd | 5757 | READING is true if reading input. |
9fa1de30 PE |
5758 | If DISPLAY_OPTION is >0 display process output while waiting. |
5759 | If DISPLAY_OPTION is >1 perform an initial redisplay before waiting. | |
902b9b6d | 5760 | */ |
4588ec20 | 5761 | |
f76475ad | 5762 | Lisp_Object |
9fa1de30 | 5763 | sit_for (Lisp_Object timeout, bool reading, int display_option) |
f76475ad | 5764 | { |
d35af63c PE |
5765 | intmax_t sec; |
5766 | int nsec; | |
9fa1de30 | 5767 | bool do_display = display_option > 0; |
f222369e | 5768 | |
902b9b6d | 5769 | swallow_events (do_display); |
ccddf474 | 5770 | |
902b9b6d | 5771 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 5772 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 5773 | return Qnil; |
4588ec20 | 5774 | |
9fa1de30 | 5775 | if (display_option > 1) |
902b9b6d KS |
5776 | redisplay_preserve_echo_area (2); |
5777 | ||
d35af63c | 5778 | if (INTEGERP (timeout)) |
2bcac766 | 5779 | { |
d35af63c | 5780 | sec = XINT (timeout); |
908589fd | 5781 | if (sec <= 0) |
d35af63c PE |
5782 | return Qt; |
5783 | nsec = 0; | |
2bcac766 | 5784 | } |
d35af63c | 5785 | else if (FLOATP (timeout)) |
d311d28c | 5786 | { |
d35af63c | 5787 | double seconds = XFLOAT_DATA (timeout); |
7216e43b | 5788 | if (! (0 < seconds)) |
d311d28c | 5789 | return Qt; |
d35af63c PE |
5790 | else |
5791 | { | |
5792 | EMACS_TIME t = EMACS_TIME_FROM_DOUBLE (seconds); | |
f1dd8073 | 5793 | sec = min (EMACS_SECS (t), WAIT_READING_MAX); |
d35af63c PE |
5794 | nsec = EMACS_NSECS (t); |
5795 | } | |
5796 | } | |
5797 | else if (EQ (timeout, Qt)) | |
5798 | { | |
5799 | sec = 0; | |
5800 | nsec = 0; | |
d311d28c | 5801 | } |
d35af63c PE |
5802 | else |
5803 | wrong_type_argument (Qnumberp, timeout); | |
5804 | ||
dfdb645c | 5805 | |
4a4bbad2 | 5806 | #ifdef USABLE_SIGIO |
f75beb47 | 5807 | gobble_input (); |
f76475ad JB |
5808 | #endif |
5809 | ||
d35af63c | 5810 | wait_reading_process_output (sec, nsec, reading ? -1 : 1, do_display, |
dcd1ca45 | 5811 | Qnil, NULL, 0); |
f76475ad | 5812 | |
4588ec20 JB |
5813 | return detect_input_pending () ? Qnil : Qt; |
5814 | } | |
5815 | ||
5f5c8ee5 | 5816 | |
a7ca3326 | 5817 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
025de85b CY |
5818 | doc: /* Perform redisplay. |
5819 | Optional arg FORCE, if non-nil, prevents redisplay from being | |
5820 | preempted by arriving input, even if `redisplay-dont-pause' is nil. | |
5821 | If `redisplay-dont-pause' is non-nil (the default), redisplay is never | |
5822 | preempted by arriving input, so FORCE does nothing. | |
5823 | ||
5824 | Return t if redisplay was performed, nil if redisplay was preempted | |
5825 | immediately by pending input. */) | |
5842a27b | 5826 | (Lisp_Object force) |
f76475ad | 5827 | { |
d311d28c | 5828 | ptrdiff_t count; |
659d9874 | 5829 | |
902b9b6d KS |
5830 | swallow_events (1); |
5831 | if ((detect_input_pending_run_timers (1) | |
01327edf | 5832 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
5833 | || !NILP (Vexecuting_kbd_macro)) |
5834 | return Qnil; | |
f76475ad | 5835 | |
01327edf KS |
5836 | count = SPECPDL_INDEX (); |
5837 | if (!NILP (force) && !redisplay_dont_pause) | |
5838 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 5839 | redisplay_preserve_echo_area (2); |
01327edf | 5840 | unbind_to (count, Qnil); |
7ba07a1a | 5841 | return Qt; |
f76475ad | 5842 | } |
5f5c8ee5 GM |
5843 | |
5844 | ||
5845 | \f | |
5846 | /*********************************************************************** | |
5847 | Other Lisp Functions | |
5848 | ***********************************************************************/ | |
5849 | ||
5850 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
5851 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 5852 | buffer-modified-flags. */ |
5f5c8ee5 GM |
5853 | |
5854 | static Lisp_Object frame_and_buffer_state; | |
5855 | ||
5856 | ||
5857 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 5858 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 5859 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
5860 | VARIABLE is a variable name whose value is either nil or a state vector |
5861 | that will be updated to contain all frames and buffers, | |
228299fa | 5862 | aside from buffers whose names start with space, |
44edd521 RS |
5863 | along with the buffers' read-only and modified flags. This allows a fast |
5864 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 5865 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
5866 | the current state. |
5867 | ||
5868 | If VARIABLE is nil, an internal variable is used. Users should not | |
5869 | pass nil for VARIABLE. */) | |
5842a27b | 5870 | (Lisp_Object variable) |
5f5c8ee5 | 5871 | { |
44edd521 | 5872 | Lisp_Object state, tail, frame, buf; |
086ca913 | 5873 | ptrdiff_t n, idx; |
5f5c8ee5 | 5874 | |
44edd521 RS |
5875 | if (! NILP (variable)) |
5876 | { | |
5877 | CHECK_SYMBOL (variable); | |
5878 | state = Fsymbol_value (variable); | |
5879 | if (! VECTORP (state)) | |
5880 | goto changed; | |
5881 | } | |
5882 | else | |
5883 | state = frame_and_buffer_state; | |
5884 | ||
086ca913 | 5885 | idx = 0; |
5f5c8ee5 GM |
5886 | FOR_EACH_FRAME (tail, frame) |
5887 | { | |
086ca913 | 5888 | if (idx == ASIZE (state)) |
44edd521 | 5889 | goto changed; |
086ca913 | 5890 | if (!EQ (AREF (state, idx++), frame)) |
5f5c8ee5 | 5891 | goto changed; |
086ca913 | 5892 | if (idx == ASIZE (state)) |
44edd521 | 5893 | goto changed; |
086ca913 | 5894 | if (!EQ (AREF (state, idx++), XFRAME (frame)->name)) |
5f5c8ee5 GM |
5895 | goto changed; |
5896 | } | |
44edd521 | 5897 | /* Check that the buffer info matches. */ |
8f3a2c26 | 5898 | FOR_EACH_LIVE_BUFFER (tail, buf) |
5f5c8ee5 | 5899 | { |
5f5c8ee5 | 5900 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 5901 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 5902 | continue; |
086ca913 | 5903 | if (idx == ASIZE (state)) |
44edd521 | 5904 | goto changed; |
086ca913 | 5905 | if (!EQ (AREF (state, idx++), buf)) |
5f5c8ee5 | 5906 | goto changed; |
086ca913 | 5907 | if (idx == ASIZE (state)) |
44edd521 | 5908 | goto changed; |
086ca913 | 5909 | if (!EQ (AREF (state, idx++), BVAR (XBUFFER (buf), read_only))) |
5f5c8ee5 | 5910 | goto changed; |
086ca913 | 5911 | if (idx == ASIZE (state)) |
44edd521 | 5912 | goto changed; |
086ca913 | 5913 | if (!EQ (AREF (state, idx++), Fbuffer_modified_p (buf))) |
5f5c8ee5 GM |
5914 | goto changed; |
5915 | } | |
086ca913 | 5916 | if (idx == ASIZE (state)) |
44edd521 | 5917 | goto changed; |
5f5c8ee5 | 5918 | /* Detect deletion of a buffer at the end of the list. */ |
086ca913 | 5919 | if (EQ (AREF (state, idx), Qlambda)) |
5f5c8ee5 | 5920 | return Qnil; |
44edd521 RS |
5921 | |
5922 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 5923 | changed: |
44edd521 RS |
5924 | /* Count the size we will need. |
5925 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
5926 | n = 1; |
5927 | FOR_EACH_FRAME (tail, frame) | |
5928 | n += 2; | |
8f3a2c26 | 5929 | FOR_EACH_LIVE_BUFFER (tail, buf) |
5f5c8ee5 | 5930 | n += 3; |
44edd521 RS |
5931 | /* Reallocate the vector if data has grown to need it, |
5932 | or if it has shrunk a lot. */ | |
5933 | if (! VECTORP (state) | |
77b37c05 PE |
5934 | || n > ASIZE (state) |
5935 | || n + 20 < ASIZE (state) / 2) | |
5f5c8ee5 | 5936 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
5937 | { |
5938 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
5939 | if (! NILP (variable)) | |
5940 | Fset (variable, state); | |
5941 | else | |
5942 | frame_and_buffer_state = state; | |
5943 | } | |
5944 | ||
5945 | /* Record the new data in the (possibly reallocated) vector. */ | |
086ca913 | 5946 | idx = 0; |
5f5c8ee5 GM |
5947 | FOR_EACH_FRAME (tail, frame) |
5948 | { | |
086ca913 DA |
5949 | ASET (state, idx, frame); |
5950 | idx++; | |
5951 | ASET (state, idx, XFRAME (frame)->name); | |
5952 | idx++; | |
5f5c8ee5 | 5953 | } |
8f3a2c26 | 5954 | FOR_EACH_LIVE_BUFFER (tail, buf) |
5f5c8ee5 | 5955 | { |
5f5c8ee5 | 5956 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 5957 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 5958 | continue; |
086ca913 DA |
5959 | ASET (state, idx, buf); |
5960 | idx++; | |
5961 | ASET (state, idx, BVAR (XBUFFER (buf), read_only)); | |
5962 | idx++; | |
5963 | ASET (state, idx, Fbuffer_modified_p (buf)); | |
5964 | idx++; | |
5f5c8ee5 GM |
5965 | } |
5966 | /* Fill up the vector with lambdas (always at least one). */ | |
086ca913 DA |
5967 | ASET (state, idx, Qlambda); |
5968 | idx++; | |
5969 | while (idx < ASIZE (state)) | |
5970 | { | |
5971 | ASET (state, idx, Qlambda); | |
5972 | idx++; | |
5973 | } | |
5f5c8ee5 | 5974 | /* Make sure we didn't overflow the vector. */ |
086ca913 | 5975 | eassert (idx <= ASIZE (state)); |
5f5c8ee5 GM |
5976 | return Qt; |
5977 | } | |
5978 | ||
5979 | ||
4588ec20 | 5980 | \f |
5f5c8ee5 GM |
5981 | /*********************************************************************** |
5982 | Initialization | |
5983 | ***********************************************************************/ | |
5984 | ||
5f5c8ee5 GM |
5985 | /* Initialization done when Emacs fork is started, before doing stty. |
5986 | Determine terminal type and set terminal_driver. Then invoke its | |
5987 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 5988 | |
dfcf069d | 5989 | void |
971de7fb | 5990 | init_display (void) |
4588ec20 | 5991 | { |
28d440ab KL |
5992 | char *terminal_type; |
5993 | ||
5f5c8ee5 GM |
5994 | /* Construct the space glyph. */ |
5995 | space_glyph.type = CHAR_GLYPH; | |
3fc809e2 | 5996 | SET_CHAR_GLYPH (space_glyph, ' ', DEFAULT_FACE_ID, 0); |
5f5c8ee5 GM |
5997 | space_glyph.charpos = -1; |
5998 | ||
4588ec20 JB |
5999 | inverse_video = 0; |
6000 | cursor_in_echo_area = 0; | |
4588ec20 | 6001 | |
1315c181 JB |
6002 | /* Now is the time to initialize this; it's used by init_sys_modes |
6003 | during startup. */ | |
2246281f | 6004 | Vinitial_window_system = Qnil; |
4588ec20 | 6005 | |
4181ad9c KL |
6006 | /* SIGWINCH needs to be handled no matter what display we start |
6007 | with. Otherwise newly opened tty frames will not resize | |
6008 | automatically. */ | |
6009 | #ifdef SIGWINCH | |
6010 | #ifndef CANNOT_DUMP | |
6011 | if (initialized) | |
6012 | #endif /* CANNOT_DUMP */ | |
2fe28299 PE |
6013 | { |
6014 | struct sigaction action; | |
6015 | emacs_sigaction_init (&action, deliver_window_change_signal); | |
6016 | sigaction (SIGWINCH, &action, 0); | |
6017 | } | |
4181ad9c | 6018 | #endif /* SIGWINCH */ |
4588ec20 | 6019 | |
d6ef42b9 | 6020 | /* If running as a daemon, no need to initialize any frames/terminal. */ |
ff808935 DN |
6021 | if (IS_DAEMON) |
6022 | return; | |
d6ef42b9 | 6023 | |
1315c181 JB |
6024 | /* If the user wants to use a window system, we shouldn't bother |
6025 | initializing the terminal. This is especially important when the | |
6026 | terminal is so dumb that emacs gives up before and doesn't bother | |
6027 | using the window system. | |
4588ec20 | 6028 | |
36bbad1d KH |
6029 | If the DISPLAY environment variable is set and nonempty, |
6030 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6031 | |
6032 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 6033 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 6034 | { |
36bbad1d | 6035 | char *display; |
36bbad1d | 6036 | display = getenv ("DISPLAY"); |
36bbad1d | 6037 | display_arg = (display != 0 && *display != 0); |
c1fc674b AS |
6038 | |
6039 | if (display_arg && !x_display_ok (display)) | |
6040 | { | |
6041 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
6042 | display); | |
6043 | inhibit_window_system = 1; | |
6044 | } | |
f040093a | 6045 | } |
d460af17 | 6046 | |
4fcc2638 | 6047 | if (!inhibit_window_system && display_arg) |
4588ec20 | 6048 | { |
111d9af3 | 6049 | Vinitial_window_system = Qx; |
4588ec20 JB |
6050 | #ifdef HAVE_X11 |
6051 | Vwindow_system_version = make_number (11); | |
039e5d71 | 6052 | #endif |
a29c3e6d | 6053 | #ifdef USE_NCURSES |
039e5d71 | 6054 | /* In some versions of ncurses, |
6a428f77 | 6055 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6056 | So call tgetent. */ |
6057 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 JB |
6058 | #endif |
6059 | return; | |
6060 | } | |
6061 | #endif /* HAVE_X_WINDOWS */ | |
6062 | ||
fd2e066a | 6063 | #ifdef HAVE_NTGUI |
177c0ea7 | 6064 | if (!inhibit_window_system) |
fd2e066a | 6065 | { |
111d9af3 | 6066 | Vinitial_window_system = Qw32; |
fd2e066a GV |
6067 | Vwindow_system_version = make_number (1); |
6068 | return; | |
6069 | } | |
6070 | #endif /* HAVE_NTGUI */ | |
6071 | ||
edfda783 AR |
6072 | #ifdef HAVE_NS |
6073 | if (!inhibit_window_system | |
6074 | #ifndef CANNOT_DUMP | |
6075 | && initialized | |
6076 | #endif | |
6077 | ) | |
6078 | { | |
111d9af3 | 6079 | Vinitial_window_system = Qns; |
5e617bc2 | 6080 | Vwindow_system_version = make_number (10); |
edfda783 AR |
6081 | return; |
6082 | } | |
6083 | #endif | |
6084 | ||
4588ec20 JB |
6085 | /* If no window system has been specified, try to use the terminal. */ |
6086 | if (! isatty (0)) | |
d9df6f40 | 6087 | fatal ("standard input is not a tty"); |
4588ec20 | 6088 | |
6152361f JR |
6089 | #ifdef WINDOWSNT |
6090 | terminal_type = "w32console"; | |
6091 | #else | |
83be8524 | 6092 | terminal_type = getenv ("TERM"); |
6152361f | 6093 | #endif |
4588ec20 JB |
6094 | if (!terminal_type) |
6095 | { | |
5d12ff0b | 6096 | #ifdef HAVE_WINDOW_SYSTEM |
b9e590fc RS |
6097 | if (! inhibit_window_system) |
6098 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6099 | else |
6100 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6101 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
4588ec20 JB |
6102 | exit (1); |
6103 | } | |
6104 | ||
0a125897 | 6105 | { |
6ed8eeff | 6106 | struct terminal *t; |
3224dac1 KL |
6107 | struct frame *f = XFRAME (selected_frame); |
6108 | ||
322aea6d PE |
6109 | init_foreground_group (); |
6110 | ||
3224dac1 | 6111 | /* Open a display on the controlling tty. */ |
6ed8eeff | 6112 | t = init_tty (0, terminal_type, 1); /* Errors are fatal. */ |
3224dac1 KL |
6113 | |
6114 | /* Convert the initial frame to use the new display. */ | |
b04f5ad2 | 6115 | if (f->output_method != output_initial) |
1088b922 | 6116 | emacs_abort (); |
6ed8eeff KL |
6117 | f->output_method = t->type; |
6118 | f->terminal = t; | |
3224dac1 | 6119 | |
6ed8eeff | 6120 | t->reference_count++; |
7ac5dac9 EZ |
6121 | #ifdef MSDOS |
6122 | f->output_data.tty->display_info = &the_only_display_info; | |
6123 | #else | |
6124 | if (f->output_method == output_termcap) | |
6125 | create_tty_output (f); | |
6126 | #endif | |
6ed8eeff | 6127 | t->display_info.tty->top_frame = selected_frame; |
5b65d888 | 6128 | change_frame_size (XFRAME (selected_frame), |
6ed8eeff KL |
6129 | FrameRows (t->display_info.tty), |
6130 | FrameCols (t->display_info.tty), 0, 0, 1); | |
3224dac1 | 6131 | |
6ed8eeff KL |
6132 | /* Delete the initial terminal. */ |
6133 | if (--initial_terminal->reference_count == 0 | |
6134 | && initial_terminal->delete_terminal_hook) | |
6135 | (*initial_terminal->delete_terminal_hook) (initial_terminal); | |
2666355c KL |
6136 | |
6137 | /* Update frame parameters to reflect the new type. */ | |
6138 | Fmodify_frame_parameters | |
6c6f1994 PE |
6139 | (selected_frame, list1 (Fcons (Qtty_type, |
6140 | Ftty_type (selected_frame)))); | |
657ceaa0 | 6141 | if (t->display_info.tty->name) |
6c6f1994 PE |
6142 | Fmodify_frame_parameters |
6143 | (selected_frame, | |
6144 | list1 (Fcons (Qtty, build_string (t->display_info.tty->name)))); | |
657ceaa0 | 6145 | else |
6c6f1994 | 6146 | Fmodify_frame_parameters (selected_frame, list1 (Fcons (Qtty, Qnil))); |
0a125897 | 6147 | } |
3fc809e2 | 6148 | |
d86c299a | 6149 | { |
91fb7e1b | 6150 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6151 | int width = FRAME_TOTAL_COLS (sf); |
6152 | int height = FRAME_LINES (sf); | |
d86c299a | 6153 | |
5f5c8ee5 | 6154 | /* If these sizes are so big they cause overflow, just ignore the |
dfd153ae PE |
6155 | change. It's not clear what better we could do. The rest of |
6156 | the code assumes that (width + 2) * height * sizeof (struct glyph) | |
6157 | does not overflow and does not exceed PTRDIFF_MAX or SIZE_MAX. */ | |
e3c25c68 PE |
6158 | if (INT_ADD_RANGE_OVERFLOW (width, 2, INT_MIN, INT_MAX) |
6159 | || INT_MULTIPLY_RANGE_OVERFLOW (width + 2, height, INT_MIN, INT_MAX) | |
dfd153ae PE |
6160 | || (min (PTRDIFF_MAX, SIZE_MAX) / sizeof (struct glyph) |
6161 | < (width + 2) * height)) | |
1559a86d | 6162 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6163 | } |
6164 | ||
91fb7e1b | 6165 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6166 | |
5f5c8ee5 GM |
6167 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ |
6168 | if (initialized | |
6169 | && !noninteractive | |
2246281f | 6170 | && NILP (Vinitial_window_system)) |
2d764c78 EZ |
6171 | { |
6172 | /* For the initial frame, we don't have any way of knowing what | |
6173 | are the foreground and background colors of the terminal. */ | |
5e617bc2 | 6174 | struct frame *sf = SELECTED_FRAME (); |
2d764c78 | 6175 | |
f9d2fdc4 EZ |
6176 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
6177 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
6178 | call0 (intern ("tty-set-up-initial-frame-faces")); |
6179 | } | |
5f5c8ee5 GM |
6180 | } |
6181 | ||
6182 | ||
6183 | \f | |
6184 | /*********************************************************************** | |
6185 | Blinking cursor | |
6186 | ***********************************************************************/ | |
6187 | ||
c3f13540 | 6188 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 6189 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 6190 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
6191 | WINDOW nil means use the selected window. SHOW non-nil means |
6192 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 | 6193 | don't show a cursor. */) |
5842a27b | 6194 | (Lisp_Object window, Lisp_Object show) |
5f5c8ee5 | 6195 | { |
5f5c8ee5 GM |
6196 | /* Don't change cursor state while redisplaying. This could confuse |
6197 | output routines. */ | |
6198 | if (!redisplaying_p) | |
b9e9df47 | 6199 | decode_any_window (window)->cursor_off_p = NILP (show); |
5f5c8ee5 | 6200 | return Qnil; |
4588ec20 | 6201 | } |
5f5c8ee5 GM |
6202 | |
6203 | ||
5d7791b3 GM |
6204 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
6205 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 6206 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 | 6207 | WINDOW nil or omitted means report on the selected window. */) |
5842a27b | 6208 | (Lisp_Object window) |
5d7791b3 | 6209 | { |
b9e9df47 | 6210 | return decode_any_window (window)->cursor_off_p ? Qnil : Qt; |
5d7791b3 GM |
6211 | } |
6212 | ||
87478b52 SM |
6213 | DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame, |
6214 | Slast_nonminibuf_frame, 0, 0, 0, | |
6215 | doc: /* Value is last nonminibuffer frame. */) | |
5842a27b | 6216 | (void) |
87478b52 | 6217 | { |
4958ed94 | 6218 | Lisp_Object frame = Qnil; |
87478b52 | 6219 | |
4958ed94 SM |
6220 | if (last_nonminibuf_frame) |
6221 | XSETFRAME (frame, last_nonminibuf_frame); | |
87478b52 SM |
6222 | |
6223 | return frame; | |
6224 | } | |
4588ec20 | 6225 | \f |
5f5c8ee5 GM |
6226 | /*********************************************************************** |
6227 | Initialization | |
6228 | ***********************************************************************/ | |
6229 | ||
dfcf069d | 6230 | void |
971de7fb | 6231 | syms_of_display (void) |
4588ec20 | 6232 | { |
502b9b64 | 6233 | defsubr (&Sredraw_frame); |
4588ec20 | 6234 | defsubr (&Sredraw_display); |
078b3696 | 6235 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
6236 | defsubr (&Sopen_termscript); |
6237 | defsubr (&Sding); | |
7ba07a1a | 6238 | defsubr (&Sredisplay); |
4588ec20 JB |
6239 | defsubr (&Ssleep_for); |
6240 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 6241 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 6242 | defsubr (&Sinternal_show_cursor_p); |
87478b52 | 6243 | defsubr (&Slast_nonminibuf_frame); |
4588ec20 | 6244 | |
e509cfa6 | 6245 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
6246 | defsubr (&Sdump_redisplay_history); |
6247 | #endif | |
6248 | ||
d1dad759 | 6249 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
6250 | staticpro (&frame_and_buffer_state); |
6251 | ||
cd3520a4 JB |
6252 | DEFSYM (Qdisplay_table, "display-table"); |
6253 | DEFSYM (Qredisplay_dont_pause, "redisplay-dont-pause"); | |
9cda4f7c | 6254 | |
29208e82 | 6255 | DEFVAR_INT ("baud-rate", baud_rate, |
025de85b | 6256 | doc: /* The output baud rate of the terminal. |
228299fa GM |
6257 | On most systems, changing this value will affect the amount of padding |
6258 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 6259 | |
29208e82 | 6260 | DEFVAR_BOOL ("inverse-video", inverse_video, |
025de85b | 6261 | doc: /* Non-nil means invert the entire frame display. |
228299fa | 6262 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 6263 | |
29208e82 | 6264 | DEFVAR_BOOL ("visible-bell", visible_bell, |
025de85b | 6265 | doc: /* Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
6266 | |
6267 | See also `ring-bell-function'. */); | |
177c0ea7 | 6268 | |
29208e82 | 6269 | DEFVAR_BOOL ("no-redraw-on-reenter", no_redraw_on_reenter, |
025de85b | 6270 | doc: /* Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
6271 | A non-nil value is useful if the terminal can automatically preserve |
6272 | Emacs's frame display when you reenter Emacs. | |
6273 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 6274 | |
29208e82 | 6275 | DEFVAR_LISP ("initial-window-system", Vinitial_window_system, |
2246281f | 6276 | doc: /* Name of the window system that Emacs uses for the first frame. |
89baa1df EZ |
6277 | The value is a symbol: |
6278 | nil for a termcap frame (a character-only terminal), | |
6279 | 'x' for an Emacs frame that is really an X window, | |
6280 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6281 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6282 | 'pc' for a direct-write MS-DOS frame. | |
6283 | ||
6284 | Use of this variable as a boolean is deprecated. Instead, | |
6285 | use `display-graphic-p' or any of the other `display-*-p' | |
6286 | predicates which report frame's specific UI-related capabilities. */); | |
177c0ea7 | 6287 | |
70b8d0a4 SM |
6288 | DEFVAR_KBOARD ("window-system", Vwindow_system, |
6289 | doc: /* Name of window system through which the selected frame is displayed. | |
89baa1df EZ |
6290 | The value is a symbol: |
6291 | nil for a termcap frame (a character-only terminal), | |
6292 | 'x' for an Emacs frame that is really an X window, | |
6293 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6294 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6295 | 'pc' for a direct-write MS-DOS frame. | |
6296 | ||
6297 | Use of this variable as a boolean is deprecated. Instead, | |
6298 | use `display-graphic-p' or any of the other `display-*-p' | |
6299 | predicates which report frame's specific UI-related capabilities. */); | |
70b8d0a4 | 6300 | |
29208e82 | 6301 | DEFVAR_LISP ("window-system-version", Vwindow_system_version, |
bacf09b4 | 6302 | doc: /* The version number of the window system in use. |
c22140f6 | 6303 | For X windows, this is 11. */); |
177c0ea7 | 6304 | |
29208e82 | 6305 | DEFVAR_BOOL ("cursor-in-echo-area", cursor_in_echo_area, |
bacf09b4 | 6306 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 6307 | |
29208e82 | 6308 | DEFVAR_LISP ("glyph-table", Vglyph_table, |
bacf09b4 | 6309 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
6310 | If not nil, this is a vector indexed by glyph code to define the glyph. |
6311 | Each element can be: | |
6312 | integer: a glyph code which this glyph is an alias for. | |
6313 | string: output this glyph using that string (not impl. in X windows). | |
6314 | nil: this glyph mod 524288 is the code of a character to output, | |
6315 | and this glyph / 524288 is the face number (see `face-id') to use | |
6316 | while outputting it. */); | |
4588ec20 JB |
6317 | Vglyph_table = Qnil; |
6318 | ||
29208e82 | 6319 | DEFVAR_LISP ("standard-display-table", Vstandard_display_table, |
bacf09b4 | 6320 | doc: /* Display table to use for buffers that specify none. |
228299fa | 6321 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
6322 | Vstandard_display_table = Qnil; |
6323 | ||
29208e82 | 6324 | DEFVAR_BOOL ("redisplay-dont-pause", redisplay_dont_pause, |
025de85b | 6325 | doc: /* Non-nil means display update isn't paused when input is detected. */); |
6bf7006f | 6326 | redisplay_dont_pause = 1; |
5f5c8ee5 | 6327 | |
4588ec20 JB |
6328 | #ifdef CANNOT_DUMP |
6329 | if (noninteractive) | |
6330 | #endif | |
6331 | { | |
2246281f | 6332 | Vinitial_window_system = Qnil; |
4588ec20 JB |
6333 | Vwindow_system_version = Qnil; |
6334 | } | |
6335 | } |