Commit | Line | Data |
---|---|---|
4588ec20 | 1 | /* Updating of data structures for redisplay. |
f84d8a70 | 2 | Copyright (C) 1985,86,87,88,93,94,95,97,98,1999,2000,01,02,2003 |
ba704fd4 | 3 | Free Software Foundation, Inc. |
4588ec20 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
fa61c701 | 9 | the Free Software Foundation; either version 2, or (at your option) |
4588ec20 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
4588ec20 | 21 | |
18160b98 | 22 | #include <config.h> |
68c45bf0 | 23 | #include <signal.h> |
565620a5 | 24 | #include <stdio.h> |
4588ec20 JB |
25 | #include <ctype.h> |
26 | ||
dfcf069d AS |
27 | #ifdef HAVE_UNISTD_H |
28 | #include <unistd.h> | |
29 | #endif | |
30 | ||
47099d6f | 31 | #include "lisp.h" |
28d440ab | 32 | #include "systty.h" /* For emacs_tty in termchar.h */ |
4588ec20 JB |
33 | #include "termchar.h" |
34 | #include "termopts.h" | |
3be08bea | 35 | #include "termhooks.h" |
a0879520 | 36 | /* cm.h must come after dispextern.h on Windows. */ |
fd2e066a GV |
37 | #include "dispextern.h" |
38 | #include "cm.h" | |
4588ec20 | 39 | #include "buffer.h" |
24e86043 | 40 | #include "charset.h" |
d43721a2 | 41 | #include "keyboard.h" |
502b9b64 | 42 | #include "frame.h" |
4588ec20 JB |
43 | #include "window.h" |
44 | #include "commands.h" | |
45 | #include "disptab.h" | |
46 | #include "indent.h" | |
d169fe39 | 47 | #include "intervals.h" |
97cf50e7 | 48 | #include "blockinput.h" |
dfcf069d | 49 | #include "process.h" |
4588ec20 | 50 | |
24e86043 KH |
51 | /* I don't know why DEC Alpha OSF1 fail to compile this file if we |
52 | include the following file. */ | |
53 | /* #include "systty.h" */ | |
58b2bb63 | 54 | #include "syssignal.h" |
a41f8bed | 55 | |
4588ec20 JB |
56 | #ifdef HAVE_X_WINDOWS |
57 | #include "xterm.h" | |
5f5c8ee5 | 58 | #endif /* HAVE_X_WINDOWS */ |
4588ec20 | 59 | |
fd2e066a GV |
60 | #ifdef HAVE_NTGUI |
61 | #include "w32term.h" | |
62 | #endif /* HAVE_NTGUI */ | |
63 | ||
e0f712ba | 64 | #ifdef MAC_OS |
1a578e9b | 65 | #include "macterm.h" |
e0f712ba | 66 | #endif /* MAC_OS */ |
1a578e9b | 67 | |
5f5c8ee5 | 68 | /* Include systime.h after xterm.h to avoid double inclusion of time.h. */ |
6cbd1643 | 69 | |
5f5c8ee5 | 70 | #include "systime.h" |
3883a901 RS |
71 | #include <errno.h> |
72 | ||
5f5c8ee5 GM |
73 | /* To get the prototype for `sleep'. */ |
74 | ||
75 | #ifdef HAVE_UNISTD_H | |
76 | #include <unistd.h> | |
77 | #endif | |
78 | ||
4588ec20 | 79 | /* Get number of chars of output now in the buffer of a stdio stream. |
5f5c8ee5 GM |
80 | This ought to be built in in stdio, but it isn't. Some s- files |
81 | override this because their stdio internals differ. */ | |
82 | ||
e3271ae5 | 83 | #ifdef __GNU_LIBRARY__ |
5f5c8ee5 GM |
84 | |
85 | /* The s- file might have overridden the definition with one that | |
86 | works for the system's C library. But we are using the GNU C | |
87 | library, so this is the right definition for every system. */ | |
88 | ||
3883a901 RS |
89 | #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT |
90 | #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT | |
91 | #else | |
cb5558ff | 92 | #undef PENDING_OUTPUT_COUNT |
e3271ae5 | 93 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer) |
3883a901 RS |
94 | #endif |
95 | #else /* not __GNU_LIBRARY__ */ | |
68c45bf0 PE |
96 | #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING |
97 | #include <stdio_ext.h> | |
98 | #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE) | |
99 | #endif | |
cb5558ff | 100 | #ifndef PENDING_OUTPUT_COUNT |
4588ec20 JB |
101 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) |
102 | #endif | |
5f5c8ee5 GM |
103 | #endif /* not __GNU_LIBRARY__ */ |
104 | ||
8a2a6032 | 105 | #if defined(HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES) |
fa0ec9f4 DL |
106 | #include <term.h> /* for tgetent */ |
107 | #endif | |
5f5c8ee5 GM |
108 | \f |
109 | /* Structure to pass dimensions around. Used for character bounding | |
110 | boxes, glyph matrix dimensions and alike. */ | |
111 | ||
112 | struct dim | |
113 | { | |
114 | int width; | |
115 | int height; | |
116 | }; | |
117 | ||
118 | \f | |
119 | /* Function prototypes. */ | |
120 | ||
bccee4f2 GM |
121 | static struct glyph_matrix *save_current_matrix P_ ((struct frame *)); |
122 | static void restore_current_matrix P_ ((struct frame *, struct glyph_matrix *)); | |
c9f00270 | 123 | static void fake_current_matrices P_ ((Lisp_Object)); |
408f5064 GM |
124 | static void redraw_overlapping_rows P_ ((struct window *, int)); |
125 | static void redraw_overlapped_rows P_ ((struct window *, int)); | |
5f5c8ee5 GM |
126 | static int count_blanks P_ ((struct glyph *, int)); |
127 | static int count_match P_ ((struct glyph *, struct glyph *, | |
128 | struct glyph *, struct glyph *)); | |
129 | static unsigned line_draw_cost P_ ((struct glyph_matrix *, int)); | |
130 | static void update_frame_line P_ ((struct frame *, int)); | |
131 | static struct dim allocate_matrices_for_frame_redisplay | |
5d3cc43c GM |
132 | P_ ((Lisp_Object, int, int, int, int *)); |
133 | static void allocate_matrices_for_window_redisplay P_ ((struct window *)); | |
5f5c8ee5 GM |
134 | static int realloc_glyph_pool P_ ((struct glyph_pool *, struct dim)); |
135 | static void adjust_frame_glyphs P_ ((struct frame *)); | |
136 | struct glyph_matrix *new_glyph_matrix P_ ((struct glyph_pool *)); | |
137 | static void free_glyph_matrix P_ ((struct glyph_matrix *)); | |
138 | static void adjust_glyph_matrix P_ ((struct window *, struct glyph_matrix *, | |
139 | int, int, struct dim)); | |
b96fd3e8 | 140 | static void change_frame_size_1 P_ ((struct frame *, int, int, int, int, int)); |
5f5c8ee5 | 141 | static void swap_glyph_pointers P_ ((struct glyph_row *, struct glyph_row *)); |
f1d2ce7f | 142 | #if GLYPH_DEBUG |
5f5c8ee5 | 143 | static int glyph_row_slice_p P_ ((struct glyph_row *, struct glyph_row *)); |
9339e87f | 144 | #endif |
5f5c8ee5 GM |
145 | static void fill_up_frame_row_with_spaces P_ ((struct glyph_row *, int)); |
146 | static void build_frame_matrix_from_window_tree P_ ((struct glyph_matrix *, | |
147 | struct window *)); | |
148 | static void build_frame_matrix_from_leaf_window P_ ((struct glyph_matrix *, | |
149 | struct window *)); | |
150 | static struct glyph_pool *new_glyph_pool P_ ((void)); | |
151 | static void free_glyph_pool P_ ((struct glyph_pool *)); | |
152 | static void adjust_frame_glyphs_initially P_ ((void)); | |
153 | static void adjust_frame_message_buffer P_ ((struct frame *)); | |
154 | static void adjust_decode_mode_spec_buffer P_ ((struct frame *)); | |
155 | static void fill_up_glyph_row_with_spaces P_ ((struct glyph_row *)); | |
156 | static void build_frame_matrix P_ ((struct frame *)); | |
157 | void clear_current_matrices P_ ((struct frame *)); | |
158 | void scroll_glyph_matrix_range P_ ((struct glyph_matrix *, int, int, | |
159 | int, int)); | |
160 | static void clear_window_matrices P_ ((struct window *, int)); | |
161 | static void fill_up_glyph_row_area_with_spaces P_ ((struct glyph_row *, int)); | |
162 | static int scrolling_window P_ ((struct window *, int)); | |
e876ff42 | 163 | static int update_window_line P_ ((struct window *, int, int *)); |
5f5c8ee5 | 164 | static void update_marginal_area P_ ((struct window *, int, int)); |
408f5064 | 165 | static int update_text_area P_ ((struct window *, int)); |
5f5c8ee5 GM |
166 | static void make_current P_ ((struct glyph_matrix *, struct glyph_matrix *, |
167 | int)); | |
168 | static void mirror_make_current P_ ((struct window *, int)); | |
169 | void check_window_matrix_pointers P_ ((struct window *)); | |
b96fd3e8 | 170 | #if GLYPH_DEBUG |
5f5c8ee5 GM |
171 | static void check_matrix_pointers P_ ((struct glyph_matrix *, |
172 | struct glyph_matrix *)); | |
b96fd3e8 | 173 | #endif |
5f5c8ee5 GM |
174 | static void mirror_line_dance P_ ((struct window *, int, int, int *, char *)); |
175 | static int update_window_tree P_ ((struct window *, int)); | |
176 | static int update_window P_ ((struct window *, int)); | |
177 | static int update_frame_1 P_ ((struct frame *, int, int)); | |
178 | static void set_window_cursor_after_update P_ ((struct window *)); | |
179 | static int row_equal_p P_ ((struct window *, struct glyph_row *, | |
e4e0bee9 | 180 | struct glyph_row *, int)); |
5f5c8ee5 GM |
181 | static void adjust_frame_glyphs_for_window_redisplay P_ ((struct frame *)); |
182 | static void adjust_frame_glyphs_for_frame_redisplay P_ ((struct frame *)); | |
183 | static void reverse_rows P_ ((struct glyph_matrix *, int, int)); | |
184 | static int margin_glyphs_to_reserve P_ ((struct window *, int, Lisp_Object)); | |
a13396c9 GM |
185 | static void sync_window_with_frame_matrix_rows P_ ((struct window *)); |
186 | struct window *frame_row_to_window P_ ((struct window *, int)); | |
5f5c8ee5 | 187 | |
5f5c8ee5 GM |
188 | \f |
189 | /* Non-zero means don't pause redisplay for pending input. (This is | |
190 | for debugging and for a future implementation of EDT-like | |
191 | scrolling. */ | |
4588ec20 | 192 | |
5f5c8ee5 | 193 | int redisplay_dont_pause; |
45140e01 | 194 | |
a41f8bed | 195 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 196 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 197 | |
502b9b64 | 198 | int frame_garbaged; |
4588ec20 | 199 | |
5f5c8ee5 | 200 | /* Nonzero means last display completed. Zero means it was preempted. */ |
4588ec20 JB |
201 | |
202 | int display_completed; | |
203 | ||
5f5c8ee5 GM |
204 | /* Lisp variable visible-bell; enables use of screen-flash instead of |
205 | audible bell. */ | |
4588ec20 JB |
206 | |
207 | int visible_bell; | |
208 | ||
502b9b64 | 209 | /* Invert the color of the whole frame, at a low level. */ |
4588ec20 JB |
210 | |
211 | int inverse_video; | |
212 | ||
213 | /* Line speed of the terminal. */ | |
214 | ||
31ade731 | 215 | EMACS_INT baud_rate; |
4588ec20 | 216 | |
5f5c8ee5 GM |
217 | /* Either nil or a symbol naming the window system under which Emacs |
218 | is running. */ | |
4588ec20 JB |
219 | |
220 | Lisp_Object Vwindow_system; | |
221 | ||
222 | /* Version number of X windows: 10, 11 or nil. */ | |
5f5c8ee5 | 223 | |
4588ec20 JB |
224 | Lisp_Object Vwindow_system_version; |
225 | ||
5f5c8ee5 GM |
226 | /* Vector of glyph definitions. Indexed by glyph number, the contents |
227 | are a string which is how to output the glyph. | |
4588ec20 JB |
228 | |
229 | If Vglyph_table is nil, a glyph is output by using its low 8 bits | |
5f5c8ee5 GM |
230 | as a character code. |
231 | ||
232 | This is an obsolete feature that is no longer used. The variable | |
233 | is retained for compatibility. */ | |
4588ec20 JB |
234 | |
235 | Lisp_Object Vglyph_table; | |
236 | ||
237 | /* Display table to use for vectors that don't specify their own. */ | |
238 | ||
239 | Lisp_Object Vstandard_display_table; | |
240 | ||
5f5c8ee5 | 241 | /* Nonzero means reading single-character input with prompt so put |
153a073c | 242 | cursor on mini-buffer after the prompt. Positive means at end of |
5f5c8ee5 GM |
243 | text in echo area; negative means at beginning of line. */ |
244 | ||
4588ec20 | 245 | int cursor_in_echo_area; |
9cda4f7c | 246 | |
e7067d00 | 247 | Lisp_Object Qdisplay_table, Qredisplay_dont_pause; |
5f5c8ee5 | 248 | |
4588ec20 | 249 | \f |
5f5c8ee5 | 250 | /* The currently selected frame. In a single-frame version, this |
91fb7e1b | 251 | variable always equals the_only_frame. */ |
4588ec20 | 252 | |
91fb7e1b | 253 | Lisp_Object selected_frame; |
4588ec20 | 254 | |
5f5c8ee5 | 255 | /* A frame which is not just a mini-buffer, or 0 if there are no such |
502b9b64 | 256 | frames. This is usually the most recent such frame that was |
87485d6f MW |
257 | selected. In a single-frame version, this variable always holds |
258 | the address of the_only_frame. */ | |
4588ec20 | 259 | |
5f5c8ee5 | 260 | struct frame *last_nonminibuf_frame; |
d52bad65 | 261 | |
5f5c8ee5 | 262 | /* Structure for info on cursor positioning. */ |
4588ec20 | 263 | |
5f5c8ee5 | 264 | struct cm Wcm; |
4588ec20 | 265 | |
5f5c8ee5 | 266 | /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 267 | |
5f5c8ee5 | 268 | int delayed_size_change; |
4588ec20 | 269 | |
5f5c8ee5 | 270 | /* 1 means glyph initialization has been completed at startup. */ |
4588ec20 | 271 | |
5f5c8ee5 | 272 | static int glyphs_initialized_initially_p; |
4588ec20 | 273 | |
5f5c8ee5 | 274 | /* Updated window if != 0. Set by update_window. */ |
4588ec20 | 275 | |
5f5c8ee5 | 276 | struct window *updated_window; |
4588ec20 | 277 | |
5f5c8ee5 | 278 | /* Glyph row updated in update_window_line, and area that is updated. */ |
4588ec20 | 279 | |
5f5c8ee5 GM |
280 | struct glyph_row *updated_row; |
281 | int updated_area; | |
4588ec20 | 282 | |
5f5c8ee5 | 283 | /* A glyph for a space. */ |
4588ec20 | 284 | |
5f5c8ee5 | 285 | struct glyph space_glyph; |
4588ec20 | 286 | |
5f5c8ee5 GM |
287 | /* Non-zero means update has been performed directly, so that there's |
288 | no need for redisplay_internal to do much work. Set by | |
289 | direct_output_for_insert. */ | |
4588ec20 | 290 | |
5f5c8ee5 | 291 | int redisplay_performed_directly_p; |
4588ec20 | 292 | |
5f5c8ee5 GM |
293 | /* Counts of allocated structures. These counts serve to diagnose |
294 | memory leaks and double frees. */ | |
4588ec20 | 295 | |
5f5c8ee5 GM |
296 | int glyph_matrix_count; |
297 | int glyph_pool_count; | |
4588ec20 | 298 | |
5f5c8ee5 GM |
299 | /* If non-null, the frame whose frame matrices are manipulated. If |
300 | null, window matrices are worked on. */ | |
4588ec20 | 301 | |
5f5c8ee5 | 302 | static struct frame *frame_matrix_frame; |
4588ec20 | 303 | |
5f5c8ee5 GM |
304 | /* Current interface for window-based redisplay. Set from init_xterm. |
305 | A null value means we are not using window-based redisplay. */ | |
4588ec20 | 306 | |
5f5c8ee5 | 307 | struct redisplay_interface *rif; |
4588ec20 | 308 | |
5f5c8ee5 GM |
309 | /* Non-zero means that fonts have been loaded since the last glyph |
310 | matrix adjustments. Redisplay must stop, and glyph matrices must | |
311 | be adjusted when this flag becomes non-zero during display. The | |
312 | reason fonts can be loaded so late is that fonts of fontsets are | |
313 | loaded on demand. */ | |
836d2cde | 314 | |
5f5c8ee5 | 315 | int fonts_changed_p; |
836d2cde | 316 | |
177c0ea7 | 317 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 318 | This may only be used for terminal frames. */ |
836d2cde | 319 | |
5f5c8ee5 | 320 | #if GLYPH_DEBUG |
4588ec20 | 321 | |
5f5c8ee5 GM |
322 | static int window_to_frame_vpos P_ ((struct window *, int)); |
323 | static int window_to_frame_hpos P_ ((struct window *, int)); | |
324 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) | |
325 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 326 | |
9b0e97aa GM |
327 | /* One element of the ring buffer containing redisplay history |
328 | information. */ | |
329 | ||
330 | struct redisplay_history | |
331 | { | |
332 | char trace[512 + 100]; | |
333 | }; | |
334 | ||
335 | /* The size of the history buffer. */ | |
336 | ||
337 | #define REDISPLAY_HISTORY_SIZE 30 | |
338 | ||
339 | /* The redisplay history buffer. */ | |
340 | ||
341 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
342 | ||
343 | /* Next free entry in redisplay_history. */ | |
344 | ||
345 | static int history_idx; | |
346 | ||
347 | /* A tick that's incremented each time something is added to the | |
348 | history. */ | |
349 | ||
350 | static unsigned history_tick; | |
351 | ||
352 | static void add_frame_display_history P_ ((struct frame *, int)); | |
353 | static void add_window_display_history P_ ((struct window *, char *, int)); | |
354 | ||
355 | ||
356 | /* Add to the redisplay history how window W has been displayed. | |
357 | MSG is a trace containing the information how W's glyph matrix | |
153a073c | 358 | has been constructed. PAUSED_P non-zero means that the update |
9b0e97aa GM |
359 | has been interrupted for pending input. */ |
360 | ||
361 | static void | |
362 | add_window_display_history (w, msg, paused_p) | |
363 | struct window *w; | |
364 | char *msg; | |
365 | int paused_p; | |
366 | { | |
367 | char *buf; | |
177c0ea7 | 368 | |
9b0e97aa GM |
369 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
370 | history_idx = 0; | |
371 | buf = redisplay_history[history_idx].trace; | |
372 | ++history_idx; | |
177c0ea7 | 373 | |
9b0e97aa GM |
374 | sprintf (buf, "%d: window %p (`%s')%s\n", |
375 | history_tick++, | |
376 | w, | |
377 | ((BUFFERP (w->buffer) | |
378 | && STRINGP (XBUFFER (w->buffer)->name)) | |
d5db4077 | 379 | ? (char *) SDATA (XBUFFER (w->buffer)->name) |
9b0e97aa GM |
380 | : "???"), |
381 | paused_p ? " ***paused***" : ""); | |
382 | strcat (buf, msg); | |
383 | } | |
384 | ||
385 | ||
386 | /* Add to the redisplay history that frame F has been displayed. | |
387 | PAUSED_P non-zero means that the update has been interrupted for | |
388 | pending input. */ | |
389 | ||
390 | static void | |
391 | add_frame_display_history (f, paused_p) | |
392 | struct frame *f; | |
393 | int paused_p; | |
394 | { | |
395 | char *buf; | |
177c0ea7 | 396 | |
9b0e97aa GM |
397 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
398 | history_idx = 0; | |
399 | buf = redisplay_history[history_idx].trace; | |
400 | ++history_idx; | |
177c0ea7 | 401 | |
9b0e97aa GM |
402 | sprintf (buf, "%d: update frame %p%s", |
403 | history_tick++, | |
404 | f, paused_p ? " ***paused***" : ""); | |
405 | } | |
406 | ||
407 | ||
408 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, | |
409 | Sdump_redisplay_history, 0, 0, "", | |
7ee72033 MB |
410 | doc: /* Dump redisplay history to stderr. */) |
411 | () | |
9b0e97aa GM |
412 | { |
413 | int i; | |
414 | ||
415 | for (i = history_idx - 1; i != history_idx; --i) | |
416 | { | |
417 | if (i < 0) | |
418 | i = REDISPLAY_HISTORY_SIZE - 1; | |
419 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
420 | } | |
421 | ||
422 | return Qnil; | |
423 | } | |
424 | ||
425 | ||
5f5c8ee5 | 426 | #else /* GLYPH_DEBUG == 0 */ |
4588ec20 | 427 | |
7df02016 KS |
428 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
429 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 430 | |
5f5c8ee5 | 431 | #endif /* GLYPH_DEBUG == 0 */ |
4588ec20 | 432 | |
4588ec20 | 433 | |
5f5c8ee5 GM |
434 | /* Like bcopy except never gets confused by overlap. Let this be the |
435 | first function defined in this file, or change emacs.c where the | |
436 | address of this function is used. */ | |
4588ec20 JB |
437 | |
438 | void | |
439 | safe_bcopy (from, to, size) | |
ea64076a KR |
440 | const char *from; |
441 | char *to; | |
4588ec20 JB |
442 | int size; |
443 | { | |
b5c685f4 | 444 | if (size <= 0 || from == to) |
4588ec20 JB |
445 | return; |
446 | ||
b5c685f4 JB |
447 | /* If the source and destination don't overlap, then bcopy can |
448 | handle it. If they do overlap, but the destination is lower in | |
449 | memory than the source, we'll assume bcopy can handle that. */ | |
450 | if (to < from || from + size <= to) | |
451 | bcopy (from, to, size); | |
452 | ||
453 | /* Otherwise, we'll copy from the end. */ | |
454 | else | |
4588ec20 | 455 | { |
ea64076a | 456 | register const char *endf = from + size; |
b5c685f4 | 457 | register char *endt = to + size; |
4588ec20 JB |
458 | |
459 | /* If TO - FROM is large, then we should break the copy into | |
460 | nonoverlapping chunks of TO - FROM bytes each. However, if | |
461 | TO - FROM is small, then the bcopy function call overhead | |
462 | makes this not worth it. The crossover point could be about | |
b5c685f4 JB |
463 | anywhere. Since I don't think the obvious copy loop is too |
464 | bad, I'm trying to err in its favor. */ | |
4588ec20 JB |
465 | if (to - from < 64) |
466 | { | |
467 | do | |
468 | *--endt = *--endf; | |
469 | while (endf != from); | |
470 | } | |
471 | else | |
472 | { | |
b5c685f4 | 473 | for (;;) |
4588ec20 JB |
474 | { |
475 | endt -= (to - from); | |
476 | endf -= (to - from); | |
477 | ||
b5c685f4 JB |
478 | if (endt < to) |
479 | break; | |
480 | ||
4588ec20 JB |
481 | bcopy (endf, endt, to - from); |
482 | } | |
b5c685f4 JB |
483 | |
484 | /* If SIZE wasn't a multiple of TO - FROM, there will be a | |
5f5c8ee5 GM |
485 | little left over. The amount left over is (endt + (to - |
486 | from)) - to, which is endt - from. */ | |
4588ec20 JB |
487 | bcopy (from, to, endt - from); |
488 | } | |
489 | } | |
177c0ea7 | 490 | } |
4588ec20 | 491 | |
4588ec20 | 492 | |
5f5c8ee5 GM |
493 | \f |
494 | /*********************************************************************** | |
495 | Glyph Matrices | |
496 | ***********************************************************************/ | |
497 | ||
498 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
499 | pool from which memory for the matrix should be allocated, or null | |
500 | for window-based redisplay where no glyph pools are used. The | |
501 | member `pool' of the glyph matrix structure returned is set to | |
502 | POOL, the structure is otherwise zeroed. */ | |
503 | ||
504 | struct glyph_matrix * | |
505 | new_glyph_matrix (pool) | |
506 | struct glyph_pool *pool; | |
4588ec20 | 507 | { |
5f5c8ee5 GM |
508 | struct glyph_matrix *result; |
509 | ||
510 | /* Allocate and clear. */ | |
511 | result = (struct glyph_matrix *) xmalloc (sizeof *result); | |
512 | bzero (result, sizeof *result); | |
4588ec20 | 513 | |
5f5c8ee5 GM |
514 | /* Increment number of allocated matrices. This count is used |
515 | to detect memory leaks. */ | |
516 | ++glyph_matrix_count; | |
4588ec20 | 517 | |
5f5c8ee5 GM |
518 | /* Set pool and return. */ |
519 | result->pool = pool; | |
520 | return result; | |
4588ec20 JB |
521 | } |
522 | ||
4588ec20 | 523 | |
5f5c8ee5 GM |
524 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
525 | ||
526 | The global counter glyph_matrix_count is decremented when a matrix | |
527 | is freed. If the count gets negative, more structures were freed | |
528 | than allocated, i.e. one matrix was freed more than once or a bogus | |
529 | pointer was passed to this function. | |
177c0ea7 | 530 | |
5f5c8ee5 GM |
531 | If MATRIX->pool is null, this means that the matrix manages its own |
532 | glyph memory---this is done for matrices on X frames. Freeing the | |
533 | matrix also frees the glyph memory in this case. */ | |
534 | ||
535 | static void | |
536 | free_glyph_matrix (matrix) | |
537 | struct glyph_matrix *matrix; | |
4588ec20 | 538 | { |
5f5c8ee5 GM |
539 | if (matrix) |
540 | { | |
541 | int i; | |
542 | ||
543 | /* Detect the case that more matrices are freed than were | |
544 | allocated. */ | |
545 | if (--glyph_matrix_count < 0) | |
546 | abort (); | |
547 | ||
548 | /* Free glyph memory if MATRIX owns it. */ | |
549 | if (matrix->pool == NULL) | |
550 | for (i = 0; i < matrix->rows_allocated; ++i) | |
551 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 552 | |
5f5c8ee5 GM |
553 | /* Free row structures and the matrix itself. */ |
554 | xfree (matrix->rows); | |
555 | xfree (matrix); | |
556 | } | |
557 | } | |
4588ec20 | 558 | |
4588ec20 | 559 | |
5f5c8ee5 GM |
560 | /* Return the number of glyphs to reserve for a marginal area of |
561 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
562 | display line of window W. MARGIN gives the width of the marginal | |
563 | area in canonical character units. MARGIN should be an integer | |
564 | or a float. */ | |
565 | ||
566 | static int | |
567 | margin_glyphs_to_reserve (w, total_glyphs, margin) | |
568 | struct window *w; | |
569 | int total_glyphs; | |
570 | Lisp_Object margin; | |
571 | { | |
572 | int n; | |
4588ec20 | 573 | |
5f5c8ee5 | 574 | if (NUMBERP (margin)) |
4588ec20 | 575 | { |
7df02016 | 576 | int width = XFASTINT (w->total_cols); |
5f5c8ee5 GM |
577 | double d = max (0, XFLOATINT (margin)); |
578 | d = min (width / 2 - 1, d); | |
579 | n = (int) ((double) total_glyphs / width * d); | |
580 | } | |
581 | else | |
582 | n = 0; | |
583 | ||
584 | return n; | |
585 | } | |
586 | ||
4588ec20 | 587 | |
5f5c8ee5 GM |
588 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
589 | window sizes. | |
4588ec20 | 590 | |
5f5c8ee5 GM |
591 | W is null if the function is called for a frame glyph matrix. |
592 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
593 | indices of the first column and row of MATRIX within the frame | |
594 | matrix, if such a matrix exists. They are zero for purely | |
595 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 596 | |
5f5c8ee5 GM |
597 | In window-based redisplay, where no frame matrices exist, glyph |
598 | matrices manage their own glyph storage. Otherwise, they allocate | |
599 | storage from a common frame glyph pool which can be found in | |
600 | MATRIX->pool. | |
23b0200c | 601 | |
5f5c8ee5 GM |
602 | The reason for this memory management strategy is to avoid complete |
603 | frame redraws if possible. When we allocate from a common pool, a | |
604 | change of the location or size of a sub-matrix within the pool | |
605 | requires a complete redisplay of the frame because we cannot easily | |
606 | make sure that the current matrices of all windows still agree with | |
607 | what is displayed on the screen. While this is usually fast, it | |
608 | leads to screen flickering. */ | |
23b0200c | 609 | |
5f5c8ee5 GM |
610 | static void |
611 | adjust_glyph_matrix (w, matrix, x, y, dim) | |
612 | struct window *w; | |
613 | struct glyph_matrix *matrix; | |
614 | int x, y; | |
615 | struct dim dim; | |
616 | { | |
617 | int i; | |
618 | int new_rows; | |
619 | int marginal_areas_changed_p = 0; | |
045dee35 GM |
620 | int header_line_changed_p = 0; |
621 | int header_line_p = 0; | |
5f5c8ee5 | 622 | int left = -1, right = -1; |
7df02016 | 623 | int window_width = -1, window_height; |
5f5c8ee5 | 624 | |
e125a2e6 RS |
625 | /* See if W had a header line that has disappeared now, or vice versa. |
626 | Get W's size. */ | |
5f5c8ee5 GM |
627 | if (w) |
628 | { | |
e125a2e6 RS |
629 | window_box (w, -1, 0, 0, &window_width, &window_height); |
630 | ||
045dee35 GM |
631 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
632 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 633 | } |
045dee35 | 634 | matrix->header_line_p = header_line_p; |
23b0200c | 635 | |
e125a2e6 RS |
636 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
637 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
638 | haven't changed. This optimization is important because preserving |
639 | the matrix means preventing redisplay. */ | |
640 | if (matrix->pool == NULL) | |
641 | { | |
7df02016 KS |
642 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
643 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
5f5c8ee5 GM |
644 | xassert (left >= 0 && right >= 0); |
645 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs | |
646 | || right != matrix->right_margin_glyphs); | |
647 | ||
648 | if (!marginal_areas_changed_p | |
649 | && !fonts_changed_p | |
045dee35 | 650 | && !header_line_changed_p |
7df02016 KS |
651 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
652 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
653 | && matrix->window_height == window_height |
654 | && matrix->window_vscroll == w->vscroll | |
655 | && matrix->window_width == window_width) | |
656 | return; | |
657 | } | |
177c0ea7 | 658 | |
5f5c8ee5 GM |
659 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
660 | if (matrix->rows_allocated < dim.height) | |
661 | { | |
662 | int size = dim.height * sizeof (struct glyph_row); | |
663 | new_rows = dim.height - matrix->rows_allocated; | |
664 | matrix->rows = (struct glyph_row *) xrealloc (matrix->rows, size); | |
665 | bzero (matrix->rows + matrix->rows_allocated, | |
666 | new_rows * sizeof *matrix->rows); | |
667 | matrix->rows_allocated = dim.height; | |
668 | } | |
669 | else | |
670 | new_rows = 0; | |
60a8948a | 671 | |
5f5c8ee5 GM |
672 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
673 | on a frame not using window-based redisplay. Set up pointers for | |
674 | each row into the glyph pool. */ | |
675 | if (matrix->pool) | |
676 | { | |
677 | xassert (matrix->pool->glyphs); | |
177c0ea7 | 678 | |
5f5c8ee5 | 679 | if (w) |
60a8948a | 680 | { |
5f5c8ee5 | 681 | left = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 682 | w->left_margin_cols); |
5f5c8ee5 | 683 | right = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 684 | w->right_margin_cols); |
60a8948a | 685 | } |
5f5c8ee5 GM |
686 | else |
687 | left = right = 0; | |
177c0ea7 | 688 | |
5f5c8ee5 | 689 | for (i = 0; i < dim.height; ++i) |
60a8948a | 690 | { |
5f5c8ee5 | 691 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
692 | |
693 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
694 | = (matrix->pool->glyphs |
695 | + (y + i) * matrix->pool->ncolumns | |
696 | + x); | |
177c0ea7 | 697 | |
5f5c8ee5 GM |
698 | if (w == NULL |
699 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 700 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
701 | { |
702 | row->glyphs[TEXT_AREA] | |
703 | = row->glyphs[LEFT_MARGIN_AREA]; | |
704 | row->glyphs[RIGHT_MARGIN_AREA] | |
705 | = row->glyphs[TEXT_AREA] + dim.width; | |
706 | row->glyphs[LAST_AREA] | |
707 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
708 | } | |
709 | else | |
710 | { | |
711 | row->glyphs[TEXT_AREA] | |
712 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
713 | row->glyphs[RIGHT_MARGIN_AREA] | |
714 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
715 | row->glyphs[LAST_AREA] | |
716 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
717 | } | |
60a8948a | 718 | } |
177c0ea7 | 719 | |
5f5c8ee5 GM |
720 | matrix->left_margin_glyphs = left; |
721 | matrix->right_margin_glyphs = right; | |
722 | } | |
723 | else | |
724 | { | |
725 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
e125a2e6 RS |
726 | its own memory. It is a window matrix for window-based redisplay. |
727 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
728 | if (dim.width > matrix->matrix_w |
729 | || new_rows | |
045dee35 | 730 | || header_line_changed_p |
5f5c8ee5 | 731 | || marginal_areas_changed_p) |
4588ec20 | 732 | { |
5f5c8ee5 GM |
733 | struct glyph_row *row = matrix->rows; |
734 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 735 | |
5f5c8ee5 GM |
736 | while (row < end) |
737 | { | |
738 | row->glyphs[LEFT_MARGIN_AREA] | |
739 | = (struct glyph *) xrealloc (row->glyphs[LEFT_MARGIN_AREA], | |
740 | (dim.width | |
741 | * sizeof (struct glyph))); | |
177c0ea7 | 742 | |
5f5c8ee5 GM |
743 | /* The mode line never has marginal areas. */ |
744 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 745 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
746 | { |
747 | row->glyphs[TEXT_AREA] | |
748 | = row->glyphs[LEFT_MARGIN_AREA]; | |
749 | row->glyphs[RIGHT_MARGIN_AREA] | |
750 | = row->glyphs[TEXT_AREA] + dim.width; | |
751 | row->glyphs[LAST_AREA] | |
752 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
753 | } | |
754 | else | |
755 | { | |
756 | row->glyphs[TEXT_AREA] | |
757 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
758 | row->glyphs[RIGHT_MARGIN_AREA] | |
759 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
760 | row->glyphs[LAST_AREA] | |
761 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
762 | } | |
763 | ++row; | |
764 | } | |
4588ec20 JB |
765 | } |
766 | ||
5f5c8ee5 GM |
767 | xassert (left >= 0 && right >= 0); |
768 | matrix->left_margin_glyphs = left; | |
769 | matrix->right_margin_glyphs = right; | |
770 | } | |
177c0ea7 | 771 | |
5f5c8ee5 GM |
772 | /* Number of rows to be used by MATRIX. */ |
773 | matrix->nrows = dim.height; | |
3ed36514 | 774 | xassert (matrix->nrows >= 0); |
5f5c8ee5 | 775 | |
b7b20fbd | 776 | if (w) |
5f5c8ee5 | 777 | { |
b7b20fbd | 778 | if (matrix == w->current_matrix) |
4588ec20 | 779 | { |
b7b20fbd GM |
780 | /* Mark rows in a current matrix of a window as not having |
781 | valid contents. It's important to not do this for | |
782 | desired matrices. When Emacs starts, it may already be | |
783 | building desired matrices when this function runs. */ | |
784 | if (window_width < 0) | |
785 | window_width = window_box_width (w, -1); | |
177c0ea7 | 786 | |
b7b20fbd GM |
787 | /* Optimize the case that only the height has changed (C-x 2, |
788 | upper window). Invalidate all rows that are no longer part | |
789 | of the window. */ | |
790 | if (!marginal_areas_changed_p | |
73d75a62 GM |
791 | && !header_line_changed_p |
792 | && new_rows == 0 | |
793 | && dim.width == matrix->matrix_w | |
7df02016 KS |
794 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
795 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 796 | && matrix->window_width == window_width) |
b7b20fbd | 797 | { |
dd42b31a GM |
798 | /* Find the last row in the window. */ |
799 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
800 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
801 | { | |
26447967 | 802 | ++i; |
dd42b31a GM |
803 | break; |
804 | } | |
b7b20fbd GM |
805 | |
806 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 807 | are invalidated below. */ |
b7b20fbd GM |
808 | if (INTEGERP (w->window_end_vpos) |
809 | && XFASTINT (w->window_end_vpos) >= i) | |
810 | w->window_end_valid = Qnil; | |
177c0ea7 | 811 | |
b7b20fbd GM |
812 | while (i < matrix->nrows) |
813 | matrix->rows[i++].enabled_p = 0; | |
814 | } | |
815 | else | |
816 | { | |
817 | for (i = 0; i < matrix->nrows; ++i) | |
818 | matrix->rows[i].enabled_p = 0; | |
819 | } | |
5f5c8ee5 | 820 | } |
b7b20fbd | 821 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 822 | { |
b7b20fbd GM |
823 | /* Rows in desired matrices always have to be cleared; |
824 | redisplay expects this is the case when it runs, so it | |
825 | had better be the case when we adjust matrices between | |
826 | redisplays. */ | |
5f5c8ee5 GM |
827 | for (i = 0; i < matrix->nrows; ++i) |
828 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 829 | } |
4588ec20 | 830 | } |
177c0ea7 JB |
831 | |
832 | ||
5f5c8ee5 GM |
833 | /* Remember last values to be able to optimize frame redraws. */ |
834 | matrix->matrix_x = x; | |
835 | matrix->matrix_y = y; | |
836 | matrix->matrix_w = dim.width; | |
837 | matrix->matrix_h = dim.height; | |
838 | ||
839 | /* Record the top y location and height of W at the time the matrix | |
840 | was last adjusted. This is used to optimize redisplay above. */ | |
841 | if (w) | |
4588ec20 | 842 | { |
7df02016 KS |
843 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
844 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
845 | matrix->window_height = window_height; |
846 | matrix->window_width = window_width; | |
847 | matrix->window_vscroll = w->vscroll; | |
848 | } | |
849 | } | |
4588ec20 | 850 | |
4588ec20 | 851 | |
5f5c8ee5 GM |
852 | /* Reverse the contents of rows in MATRIX between START and END. The |
853 | contents of the row at END - 1 end up at START, END - 2 at START + | |
854 | 1 etc. This is part of the implementation of rotate_matrix (see | |
855 | below). */ | |
d52bad65 | 856 | |
5f5c8ee5 GM |
857 | static void |
858 | reverse_rows (matrix, start, end) | |
859 | struct glyph_matrix *matrix; | |
860 | int start, end; | |
861 | { | |
862 | int i, j; | |
23b0200c | 863 | |
5f5c8ee5 GM |
864 | for (i = start, j = end - 1; i < j; ++i, --j) |
865 | { | |
866 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
867 | initialization. */ | |
868 | struct glyph_row temp; | |
869 | temp = matrix->rows[i]; | |
870 | matrix->rows[i] = matrix->rows[j]; | |
871 | matrix->rows[j] = temp; | |
872 | } | |
873 | } | |
23b0200c | 874 | |
23b0200c | 875 | |
5f5c8ee5 GM |
876 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
877 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
878 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
879 | row structures are moved around). | |
60a8948a | 880 | |
5f5c8ee5 GM |
881 | The algorithm used for rotating the vector was, I believe, first |
882 | described by Kernighan. See the vector R as consisting of two | |
883 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
884 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
885 | and reverse the result to get (ArBr)r which is BA. Similar for | |
886 | rotating right. */ | |
887 | ||
888 | void | |
889 | rotate_matrix (matrix, first, last, by) | |
890 | struct glyph_matrix *matrix; | |
891 | int first, last, by; | |
892 | { | |
893 | if (by < 0) | |
894 | { | |
895 | /* Up (rotate left, i.e. towards lower indices). */ | |
896 | by = -by; | |
897 | reverse_rows (matrix, first, first + by); | |
898 | reverse_rows (matrix, first + by, last); | |
899 | reverse_rows (matrix, first, last); | |
900 | } | |
901 | else if (by > 0) | |
902 | { | |
903 | /* Down (rotate right, i.e. towards higher indices). */ | |
904 | reverse_rows (matrix, last - by, last); | |
905 | reverse_rows (matrix, first, last - by); | |
906 | reverse_rows (matrix, first, last); | |
907 | } | |
908 | } | |
909 | ||
910 | ||
911 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
912 | with indices START <= index < END. Increment positions by DELTA/ | |
913 | DELTA_BYTES. */ | |
914 | ||
915 | void | |
86c11ba1 | 916 | increment_matrix_positions (matrix, start, end, delta, delta_bytes) |
5f5c8ee5 GM |
917 | struct glyph_matrix *matrix; |
918 | int start, end, delta, delta_bytes; | |
919 | { | |
920 | /* Check that START and END are reasonable values. */ | |
921 | xassert (start >= 0 && start <= matrix->nrows); | |
922 | xassert (end >= 0 && end <= matrix->nrows); | |
923 | xassert (start <= end); | |
924 | ||
925 | for (; start < end; ++start) | |
86c11ba1 | 926 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
927 | } |
928 | ||
929 | ||
930 | /* Enable a range of rows in glyph matrix MATRIX. START and END are | |
931 | the row indices of the first and last + 1 row to enable. If | |
932 | ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */ | |
933 | ||
934 | void | |
935 | enable_glyph_matrix_rows (matrix, start, end, enabled_p) | |
936 | struct glyph_matrix *matrix; | |
937 | int start, end; | |
938 | int enabled_p; | |
939 | { | |
3ed36514 GM |
940 | xassert (start <= end); |
941 | xassert (start >= 0 && start < matrix->nrows); | |
942 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 943 | |
5f5c8ee5 GM |
944 | for (; start < end; ++start) |
945 | matrix->rows[start].enabled_p = enabled_p != 0; | |
946 | } | |
947 | ||
948 | ||
949 | /* Clear MATRIX. | |
950 | ||
951 | This empties all rows in MATRIX by setting the enabled_p flag for | |
952 | all rows of the matrix to zero. The function prepare_desired_row | |
953 | will eventually really clear a row when it sees one with a zero | |
954 | enabled_p flag. | |
955 | ||
956 | Resets update hints to defaults value. The only update hint | |
957 | currently present is the flag MATRIX->no_scrolling_p. */ | |
958 | ||
959 | void | |
960 | clear_glyph_matrix (matrix) | |
961 | struct glyph_matrix *matrix; | |
962 | { | |
963 | if (matrix) | |
964 | { | |
965 | enable_glyph_matrix_rows (matrix, 0, matrix->nrows, 0); | |
966 | matrix->no_scrolling_p = 0; | |
967 | } | |
968 | } | |
177c0ea7 | 969 | |
5f5c8ee5 GM |
970 | |
971 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
972 | Increment y-positions in glyph rows between START and END by DY, | |
973 | and recompute their visible height. */ | |
974 | ||
975 | void | |
976 | shift_glyph_matrix (w, matrix, start, end, dy) | |
977 | struct window *w; | |
978 | struct glyph_matrix *matrix; | |
979 | int start, end, dy; | |
980 | { | |
981 | int min_y, max_y; | |
177c0ea7 | 982 | |
5f5c8ee5 GM |
983 | xassert (start <= end); |
984 | xassert (start >= 0 && start < matrix->nrows); | |
985 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 986 | |
7df02016 KS |
987 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
988 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 989 | |
5f5c8ee5 GM |
990 | for (; start < end; ++start) |
991 | { | |
992 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 993 | |
5f5c8ee5 | 994 | row->y += dy; |
d6c747a4 | 995 | row->visible_height = row->height; |
177c0ea7 | 996 | |
5f5c8ee5 | 997 | if (row->y < min_y) |
d6c747a4 GM |
998 | row->visible_height -= min_y - row->y; |
999 | if (row->y + row->height > max_y) | |
1000 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
1001 | } |
1002 | } | |
1003 | ||
1004 | ||
1005 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
1006 | invalid is done by setting enabled_p to zero for all rows in a | |
1007 | current matrix. */ | |
1008 | ||
1009 | void | |
1010 | clear_current_matrices (f) | |
1011 | register struct frame *f; | |
1012 | { | |
1013 | /* Clear frame current matrix, if we have one. */ | |
1014 | if (f->current_matrix) | |
1015 | clear_glyph_matrix (f->current_matrix); | |
1016 | ||
1017 | /* Clear the matrix of the menu bar window, if such a window exists. | |
1018 | The menu bar window is currently used to display menus on X when | |
1019 | no toolkit support is compiled in. */ | |
1020 | if (WINDOWP (f->menu_bar_window)) | |
1021 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
1022 | ||
9ea173e8 GM |
1023 | /* Clear the matrix of the tool-bar window, if any. */ |
1024 | if (WINDOWP (f->tool_bar_window)) | |
1025 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
5f5c8ee5 GM |
1026 | |
1027 | /* Clear current window matrices. */ | |
1028 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
1029 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); | |
1030 | } | |
1031 | ||
1032 | ||
1033 | /* Clear out all display lines of F for a coming redisplay. */ | |
1034 | ||
1035 | void | |
1036 | clear_desired_matrices (f) | |
1037 | register struct frame *f; | |
1038 | { | |
1039 | if (f->desired_matrix) | |
1040 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 1041 | |
5f5c8ee5 GM |
1042 | if (WINDOWP (f->menu_bar_window)) |
1043 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
1044 | ||
9ea173e8 GM |
1045 | if (WINDOWP (f->tool_bar_window)) |
1046 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
5f5c8ee5 GM |
1047 | |
1048 | /* Do it for window matrices. */ | |
1049 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
1050 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
1051 | } | |
1052 | ||
1053 | ||
1054 | /* Clear matrices in window tree rooted in W. If DESIRED_P is | |
1055 | non-zero clear desired matrices, otherwise clear current matrices. */ | |
1056 | ||
1057 | static void | |
1058 | clear_window_matrices (w, desired_p) | |
1059 | struct window *w; | |
1060 | int desired_p; | |
1061 | { | |
1062 | while (w) | |
1063 | { | |
1064 | if (!NILP (w->hchild)) | |
1065 | { | |
1066 | xassert (WINDOWP (w->hchild)); | |
1067 | clear_window_matrices (XWINDOW (w->hchild), desired_p); | |
1068 | } | |
1069 | else if (!NILP (w->vchild)) | |
1070 | { | |
1071 | xassert (WINDOWP (w->vchild)); | |
1072 | clear_window_matrices (XWINDOW (w->vchild), desired_p); | |
1073 | } | |
1074 | else | |
1075 | { | |
1076 | if (desired_p) | |
1077 | clear_glyph_matrix (w->desired_matrix); | |
1078 | else | |
1079 | { | |
1080 | clear_glyph_matrix (w->current_matrix); | |
1081 | w->window_end_valid = Qnil; | |
1082 | } | |
1083 | } | |
1084 | ||
1085 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
1086 | } | |
1087 | } | |
1088 | ||
1089 | ||
1090 | \f | |
1091 | /*********************************************************************** | |
1092 | Glyph Rows | |
1093 | ||
1094 | See dispextern.h for an overall explanation of glyph rows. | |
1095 | ***********************************************************************/ | |
1096 | ||
1097 | /* Clear glyph row ROW. Do it in a way that makes it robust against | |
1098 | changes in the glyph_row structure, i.e. addition or removal of | |
1099 | structure members. */ | |
1100 | ||
2cca872d KH |
1101 | static struct glyph_row null_row; |
1102 | ||
5f5c8ee5 GM |
1103 | void |
1104 | clear_glyph_row (row) | |
1105 | struct glyph_row *row; | |
1106 | { | |
1107 | struct glyph *p[1 + LAST_AREA]; | |
5f5c8ee5 GM |
1108 | |
1109 | /* Save pointers. */ | |
1110 | p[LEFT_MARGIN_AREA] = row->glyphs[LEFT_MARGIN_AREA]; | |
1111 | p[TEXT_AREA] = row->glyphs[TEXT_AREA]; | |
1112 | p[RIGHT_MARGIN_AREA] = row->glyphs[RIGHT_MARGIN_AREA]; | |
1113 | p[LAST_AREA] = row->glyphs[LAST_AREA]; | |
1114 | ||
1115 | /* Clear. */ | |
1116 | *row = null_row; | |
1117 | ||
1118 | /* Restore pointers. */ | |
1119 | row->glyphs[LEFT_MARGIN_AREA] = p[LEFT_MARGIN_AREA]; | |
1120 | row->glyphs[TEXT_AREA] = p[TEXT_AREA]; | |
1121 | row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA]; | |
1122 | row->glyphs[LAST_AREA] = p[LAST_AREA]; | |
45560b1a GM |
1123 | |
1124 | #if 0 /* At some point, some bit-fields of struct glyph were not set, | |
1125 | which made glyphs unequal when compared with GLYPH_EQUAL_P. | |
1126 | Redisplay outputs such glyphs, and flickering effects were | |
1127 | the result. This also depended on the contents of memory | |
1128 | returned by xmalloc. If flickering happens again, activate | |
153a073c | 1129 | the code below. If the flickering is gone with that, chances |
45560b1a GM |
1130 | are that the flickering has the same reason as here. */ |
1131 | bzero (p[0], (char *) p[LAST_AREA] - (char *) p[0]); | |
1132 | #endif | |
5f5c8ee5 GM |
1133 | } |
1134 | ||
1135 | ||
1136 | /* Make ROW an empty, enabled row of canonical character height, | |
1137 | in window W starting at y-position Y. */ | |
1138 | ||
1139 | void | |
1140 | blank_row (w, row, y) | |
1141 | struct window *w; | |
1142 | struct glyph_row *row; | |
1143 | int y; | |
1144 | { | |
1145 | int min_y, max_y; | |
177c0ea7 | 1146 | |
7df02016 KS |
1147 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
1148 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 1149 | |
5f5c8ee5 GM |
1150 | clear_glyph_row (row); |
1151 | row->y = y; | |
408f5064 | 1152 | row->ascent = row->phys_ascent = 0; |
7df02016 | 1153 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 1154 | row->visible_height = row->height; |
177c0ea7 | 1155 | |
5f5c8ee5 | 1156 | if (row->y < min_y) |
d6c747a4 GM |
1157 | row->visible_height -= min_y - row->y; |
1158 | if (row->y + row->height > max_y) | |
1159 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
1160 | |
1161 | row->enabled_p = 1; | |
1162 | } | |
1163 | ||
1164 | ||
1165 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
1166 | are the amounts by which to change positions. Note that the first | |
1167 | glyph of the text area of a row can have a buffer position even if | |
1168 | the used count of the text area is zero. Such rows display line | |
1169 | ends. */ | |
1170 | ||
1171 | void | |
86c11ba1 | 1172 | increment_row_positions (row, delta, delta_bytes) |
5f5c8ee5 GM |
1173 | struct glyph_row *row; |
1174 | int delta, delta_bytes; | |
1175 | { | |
1176 | int area, i; | |
1177 | ||
1178 | /* Increment start and end positions. */ | |
1179 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
1180 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
1181 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
1182 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
1183 | ||
1184 | /* Increment positions in glyphs. */ | |
1185 | for (area = 0; area < LAST_AREA; ++area) | |
1186 | for (i = 0; i < row->used[area]; ++i) | |
1187 | if (BUFFERP (row->glyphs[area][i].object) | |
1188 | && row->glyphs[area][i].charpos > 0) | |
1189 | row->glyphs[area][i].charpos += delta; | |
1190 | ||
1191 | /* Capture the case of rows displaying a line end. */ | |
1192 | if (row->used[TEXT_AREA] == 0 | |
1193 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1194 | row->glyphs[TEXT_AREA]->charpos += delta; | |
1195 | } | |
1196 | ||
1197 | ||
9af3e742 | 1198 | #if 0 |
5f5c8ee5 GM |
1199 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
1200 | contents, i.e. glyph structure contents are exchanged between A and | |
1201 | B without changing glyph pointers in A and B. */ | |
1202 | ||
1203 | static void | |
1204 | swap_glyphs_in_rows (a, b) | |
1205 | struct glyph_row *a, *b; | |
1206 | { | |
1207 | int area; | |
1208 | ||
1209 | for (area = 0; area < LAST_AREA; ++area) | |
1210 | { | |
1211 | /* Number of glyphs to swap. */ | |
1212 | int max_used = max (a->used[area], b->used[area]); | |
1213 | ||
1214 | /* Start of glyphs in area of row A. */ | |
1215 | struct glyph *glyph_a = a->glyphs[area]; | |
1216 | ||
1217 | /* End + 1 of glyphs in area of row A. */ | |
1218 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
1219 | ||
1220 | /* Start of glyphs in area of row B. */ | |
1221 | struct glyph *glyph_b = b->glyphs[area]; | |
1222 | ||
1223 | while (glyph_a < glyph_a_end) | |
1224 | { | |
1225 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
1226 | initialization. */ | |
1227 | struct glyph temp; | |
1228 | temp = *glyph_a; | |
1229 | *glyph_a = *glyph_b; | |
1230 | *glyph_b = temp; | |
1231 | ++glyph_a; | |
1232 | ++glyph_b; | |
1233 | } | |
1234 | } | |
1235 | } | |
1236 | ||
9af3e742 | 1237 | #endif /* 0 */ |
5f5c8ee5 GM |
1238 | |
1239 | /* Exchange pointers to glyph memory between glyph rows A and B. */ | |
1240 | ||
1241 | static INLINE void | |
1242 | swap_glyph_pointers (a, b) | |
1243 | struct glyph_row *a, *b; | |
1244 | { | |
1245 | int i; | |
1246 | for (i = 0; i < LAST_AREA + 1; ++i) | |
1247 | { | |
1248 | struct glyph *temp = a->glyphs[i]; | |
1249 | a->glyphs[i] = b->glyphs[i]; | |
1250 | b->glyphs[i] = temp; | |
1251 | } | |
1252 | } | |
1253 | ||
1254 | ||
1255 | /* Copy glyph row structure FROM to glyph row structure TO, except | |
1256 | that glyph pointers in the structures are left unchanged. */ | |
1257 | ||
1258 | INLINE void | |
1259 | copy_row_except_pointers (to, from) | |
1260 | struct glyph_row *to, *from; | |
1261 | { | |
1262 | struct glyph *pointers[1 + LAST_AREA]; | |
1263 | ||
1264 | /* Save glyph pointers of TO. */ | |
1265 | bcopy (to->glyphs, pointers, sizeof to->glyphs); | |
1266 | ||
1267 | /* Do a structure assignment. */ | |
1268 | *to = *from; | |
1269 | ||
1270 | /* Restore original pointers of TO. */ | |
1271 | bcopy (pointers, to->glyphs, sizeof to->glyphs); | |
1272 | } | |
1273 | ||
1274 | ||
1275 | /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in | |
1276 | TO and FROM are left unchanged. Glyph contents are copied from the | |
1277 | glyph memory of FROM to the glyph memory of TO. Increment buffer | |
1278 | positions in row TO by DELTA/ DELTA_BYTES. */ | |
1279 | ||
1280 | void | |
1281 | copy_glyph_row_contents (to, from, delta, delta_bytes) | |
1282 | struct glyph_row *to, *from; | |
1283 | int delta, delta_bytes; | |
1284 | { | |
1285 | int area; | |
1286 | ||
1287 | /* This is like a structure assignment TO = FROM, except that | |
1288 | glyph pointers in the rows are left unchanged. */ | |
1289 | copy_row_except_pointers (to, from); | |
1290 | ||
1291 | /* Copy glyphs from FROM to TO. */ | |
1292 | for (area = 0; area < LAST_AREA; ++area) | |
1293 | if (from->used[area]) | |
177c0ea7 | 1294 | bcopy (from->glyphs[area], to->glyphs[area], |
5f5c8ee5 GM |
1295 | from->used[area] * sizeof (struct glyph)); |
1296 | ||
1297 | /* Increment buffer positions in TO by DELTA. */ | |
86c11ba1 | 1298 | increment_row_positions (to, delta, delta_bytes); |
5f5c8ee5 GM |
1299 | } |
1300 | ||
1301 | ||
1302 | /* Assign glyph row FROM to glyph row TO. This works like a structure | |
1303 | assignment TO = FROM, except that glyph pointers are not copied but | |
1304 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1305 | a memory leak. */ | |
1306 | ||
1307 | static INLINE void | |
1308 | assign_row (to, from) | |
1309 | struct glyph_row *to, *from; | |
1310 | { | |
1311 | swap_glyph_pointers (to, from); | |
1312 | copy_row_except_pointers (to, from); | |
1313 | } | |
1314 | ||
1315 | ||
1316 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1317 | a row in a window matrix, is a slice of the glyph memory of the | |
1318 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
1319 | is non-zero if the glyph memory of WINDOW_ROW is part of the glyph | |
1320 | memory of FRAME_ROW. */ | |
1321 | ||
2d5912c1 | 1322 | #if GLYPH_DEBUG |
9339e87f | 1323 | |
5f5c8ee5 GM |
1324 | static int |
1325 | glyph_row_slice_p (window_row, frame_row) | |
1326 | struct glyph_row *window_row, *frame_row; | |
1327 | { | |
1328 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1329 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1330 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1331 | ||
1332 | return (frame_glyph_start <= window_glyph_start | |
1333 | && window_glyph_start < frame_glyph_end); | |
1334 | } | |
1335 | ||
9339e87f | 1336 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1337 | |
9af3e742 GM |
1338 | #if 0 |
1339 | ||
5f5c8ee5 GM |
1340 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1341 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1342 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1343 | ||
1344 | static struct glyph_row * | |
1345 | find_glyph_row_slice (window_matrix, frame_matrix, row) | |
1346 | struct glyph_matrix *window_matrix, *frame_matrix; | |
1347 | int row; | |
1348 | { | |
1349 | int i; | |
1350 | ||
1351 | xassert (row >= 0 && row < frame_matrix->nrows); | |
1352 | ||
1353 | for (i = 0; i < window_matrix->nrows; ++i) | |
1354 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1355 | frame_matrix->rows + row)) | |
1356 | break; | |
1357 | ||
1358 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1359 | } | |
1360 | ||
9af3e742 | 1361 | #endif /* 0 */ |
5f5c8ee5 GM |
1362 | |
1363 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1364 | i.e. they are only marked as to be cleared by setting their | |
1365 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1366 | call to this function really clears it. */ | |
1367 | ||
1368 | void | |
1369 | prepare_desired_row (row) | |
1370 | struct glyph_row *row; | |
1371 | { | |
1372 | if (!row->enabled_p) | |
1373 | { | |
1374 | clear_glyph_row (row); | |
1375 | row->enabled_p = 1; | |
1376 | } | |
1377 | } | |
1378 | ||
1379 | ||
1380 | /* Return a hash code for glyph row ROW. */ | |
1381 | ||
1382 | int | |
1383 | line_hash_code (row) | |
1384 | struct glyph_row *row; | |
1385 | { | |
1386 | int hash = 0; | |
177c0ea7 | 1387 | |
5f5c8ee5 GM |
1388 | if (row->enabled_p) |
1389 | { | |
4cecaab8 MB |
1390 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1391 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1392 | ||
1393 | while (glyph < end) | |
1394 | { | |
1395 | int c = glyph->u.ch; | |
1396 | int face_id = glyph->face_id; | |
28d440ab | 1397 | if (TTY_MUST_WRITE_SPACES (CURTTY ())) |
4cecaab8 MB |
1398 | c -= SPACEGLYPH; |
1399 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1400 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1401 | ++glyph; | |
1402 | } | |
5f5c8ee5 | 1403 | |
4cecaab8 MB |
1404 | if (hash == 0) |
1405 | hash = 1; | |
5f5c8ee5 GM |
1406 | } |
1407 | ||
1408 | return hash; | |
1409 | } | |
1410 | ||
1411 | ||
153a073c | 1412 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1413 | the number of characters in the line. If must_write_spaces is |
1414 | zero, leading and trailing spaces are ignored. */ | |
1415 | ||
1416 | static unsigned int | |
1417 | line_draw_cost (matrix, vpos) | |
1418 | struct glyph_matrix *matrix; | |
1419 | int vpos; | |
1420 | { | |
1421 | struct glyph_row *row = matrix->rows + vpos; | |
1422 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1423 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1424 | int len; | |
1425 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
1426 | int glyph_table_len = GLYPH_TABLE_LENGTH; | |
1427 | ||
1428 | /* Ignore trailing and leading spaces if we can. */ | |
28d440ab | 1429 | if (!TTY_MUST_WRITE_SPACES (CURTTY ())) |
5f5c8ee5 GM |
1430 | { |
1431 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1432 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1433 | --end; |
1434 | ||
177c0ea7 | 1435 | /* All blank line. */ |
5f5c8ee5 GM |
1436 | if (end == beg) |
1437 | return 0; | |
1438 | ||
1439 | /* Skip over leading spaces. */ | |
1440 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1441 | ++beg; | |
1442 | } | |
1443 | ||
1444 | /* If we don't have a glyph-table, each glyph is one character, | |
1445 | so return the number of glyphs. */ | |
1446 | if (glyph_table_base == 0) | |
1447 | len = end - beg; | |
1448 | else | |
1449 | { | |
1450 | /* Otherwise, scan the glyphs and accumulate their total length | |
1451 | in LEN. */ | |
1452 | len = 0; | |
1453 | while (beg < end) | |
1454 | { | |
1455 | GLYPH g = GLYPH_FROM_CHAR_GLYPH (*beg); | |
177c0ea7 | 1456 | |
42186983 KH |
1457 | if (g < 0 |
1458 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) | |
5f5c8ee5 GM |
1459 | len += 1; |
1460 | else | |
1461 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1462 | |
5f5c8ee5 GM |
1463 | ++beg; |
1464 | } | |
1465 | } | |
177c0ea7 | 1466 | |
5f5c8ee5 GM |
1467 | return len; |
1468 | } | |
1469 | ||
1470 | ||
1471 | /* Test two glyph rows A and B for equality. Value is non-zero if A | |
1472 | and B have equal contents. W is the window to which the glyphs | |
1473 | rows A and B belong. It is needed here to test for partial row | |
e4e0bee9 GM |
1474 | visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p |
1475 | flags of A and B, too. */ | |
5f5c8ee5 | 1476 | |
177c0ea7 | 1477 | static INLINE int |
e4e0bee9 | 1478 | row_equal_p (w, a, b, mouse_face_p) |
5f5c8ee5 GM |
1479 | struct window *w; |
1480 | struct glyph_row *a, *b; | |
e4e0bee9 | 1481 | int mouse_face_p; |
5f5c8ee5 GM |
1482 | { |
1483 | if (a == b) | |
1484 | return 1; | |
1485 | else if (a->hash != b->hash) | |
1486 | return 0; | |
1487 | else | |
1488 | { | |
1489 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1490 | int area; | |
1491 | ||
e4e0bee9 GM |
1492 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1493 | return 0; | |
1494 | ||
5f5c8ee5 GM |
1495 | /* Compare glyphs. */ |
1496 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1497 | { | |
1498 | if (a->used[area] != b->used[area]) | |
1499 | return 0; | |
177c0ea7 | 1500 | |
5f5c8ee5 GM |
1501 | a_glyph = a->glyphs[area]; |
1502 | a_end = a_glyph + a->used[area]; | |
1503 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1504 | |
5f5c8ee5 GM |
1505 | while (a_glyph < a_end |
1506 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1507 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1508 | |
5f5c8ee5 GM |
1509 | if (a_glyph != a_end) |
1510 | return 0; | |
1511 | } | |
1512 | ||
1513 | if (a->truncated_on_left_p != b->truncated_on_left_p | |
5f5c8ee5 GM |
1514 | || a->fill_line_p != b->fill_line_p |
1515 | || a->truncated_on_right_p != b->truncated_on_right_p | |
1516 | || a->overlay_arrow_p != b->overlay_arrow_p | |
1517 | || a->continued_p != b->continued_p | |
1518 | || a->indicate_empty_line_p != b->indicate_empty_line_p | |
408f5064 | 1519 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1520 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1521 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
1522 | /* Different partially visible characters on left margin. */ | |
1523 | || a->x != b->x | |
1524 | /* Different height. */ | |
1525 | || a->ascent != b->ascent | |
408f5064 GM |
1526 | || a->phys_ascent != b->phys_ascent |
1527 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1528 | || a->visible_height != b->visible_height) |
1529 | return 0; | |
1530 | } | |
1531 | ||
1532 | return 1; | |
1533 | } | |
1534 | ||
1535 | ||
1536 | \f | |
1537 | /*********************************************************************** | |
1538 | Glyph Pool | |
1539 | ||
1540 | See dispextern.h for an overall explanation of glyph pools. | |
1541 | ***********************************************************************/ | |
1542 | ||
1543 | /* Allocate a glyph_pool structure. The structure returned is | |
1544 | initialized with zeros. The global variable glyph_pool_count is | |
1545 | incremented for each pool allocated. */ | |
1546 | ||
1547 | static struct glyph_pool * | |
1548 | new_glyph_pool () | |
1549 | { | |
1550 | struct glyph_pool *result; | |
1551 | ||
1552 | /* Allocate a new glyph_pool and clear it. */ | |
1553 | result = (struct glyph_pool *) xmalloc (sizeof *result); | |
1554 | bzero (result, sizeof *result); | |
177c0ea7 | 1555 | |
5f5c8ee5 GM |
1556 | /* For memory leak and double deletion checking. */ |
1557 | ++glyph_pool_count; | |
177c0ea7 | 1558 | |
5f5c8ee5 GM |
1559 | return result; |
1560 | } | |
1561 | ||
1562 | ||
1563 | /* Free a glyph_pool structure POOL. The function may be called with | |
1564 | a null POOL pointer. The global variable glyph_pool_count is | |
1565 | decremented with every pool structure freed. If this count gets | |
1566 | negative, more structures were freed than allocated, i.e. one | |
1567 | structure must have been freed more than once or a bogus pointer | |
1568 | was passed to free_glyph_pool. */ | |
1569 | ||
1570 | static void | |
1571 | free_glyph_pool (pool) | |
1572 | struct glyph_pool *pool; | |
1573 | { | |
1574 | if (pool) | |
1575 | { | |
153a073c | 1576 | /* More freed than allocated? */ |
5f5c8ee5 GM |
1577 | --glyph_pool_count; |
1578 | xassert (glyph_pool_count >= 0); | |
1579 | ||
1580 | xfree (pool->glyphs); | |
1581 | xfree (pool); | |
1582 | } | |
1583 | } | |
1584 | ||
1585 | ||
1586 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1587 | columns we need. This function never shrinks a pool. The only | |
1588 | case in which this would make sense, would be when a frame's size | |
1589 | is changed from a large value to a smaller one. But, if someone | |
1590 | does it once, we can expect that he will do it again. | |
1591 | ||
1592 | Value is non-zero if the pool changed in a way which makes | |
1593 | re-adjusting window glyph matrices necessary. */ | |
1594 | ||
1595 | static int | |
1596 | realloc_glyph_pool (pool, matrix_dim) | |
1597 | struct glyph_pool *pool; | |
1598 | struct dim matrix_dim; | |
1599 | { | |
1600 | int needed; | |
1601 | int changed_p; | |
1602 | ||
1603 | changed_p = (pool->glyphs == 0 | |
1604 | || matrix_dim.height != pool->nrows | |
1605 | || matrix_dim.width != pool->ncolumns); | |
1606 | ||
1607 | /* Enlarge the glyph pool. */ | |
1608 | needed = matrix_dim.width * matrix_dim.height; | |
1609 | if (needed > pool->nglyphs) | |
1610 | { | |
1611 | int size = needed * sizeof (struct glyph); | |
1612 | ||
1613 | if (pool->glyphs) | |
1614 | pool->glyphs = (struct glyph *) xrealloc (pool->glyphs, size); | |
1615 | else | |
1616 | { | |
1617 | pool->glyphs = (struct glyph *) xmalloc (size); | |
1618 | bzero (pool->glyphs, size); | |
1619 | } | |
1620 | ||
1621 | pool->nglyphs = needed; | |
1622 | } | |
1623 | ||
153a073c | 1624 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1625 | to do sanity checks, and (b) the number of columns determines |
1626 | where rows in the frame matrix start---this must be available to | |
1627 | determine pointers to rows of window sub-matrices. */ | |
1628 | pool->nrows = matrix_dim.height; | |
1629 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1630 | |
5f5c8ee5 GM |
1631 | return changed_p; |
1632 | } | |
1633 | ||
1634 | ||
1635 | \f | |
1636 | /*********************************************************************** | |
1637 | Debug Code | |
1638 | ***********************************************************************/ | |
1639 | ||
1640 | #if GLYPH_DEBUG | |
1641 | ||
a13396c9 | 1642 | |
28d440ab KL |
1643 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1644 | XXX Maybe this should be changed to flush the current terminal instead of | |
1645 | stdout. | |
1646 | */ | |
a13396c9 GM |
1647 | |
1648 | void | |
1649 | flush_stdout () | |
1650 | { | |
1651 | fflush (stdout); | |
1652 | } | |
1653 | ||
1654 | ||
5f5c8ee5 GM |
1655 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1656 | pointer has been lost, e.g. by using a structure assignment between | |
1657 | rows, at least one pointer must occur more than once in the rows of | |
1658 | MATRIX. */ | |
1659 | ||
1660 | void | |
1661 | check_matrix_pointer_lossage (matrix) | |
1662 | struct glyph_matrix *matrix; | |
1663 | { | |
1664 | int i, j; | |
177c0ea7 | 1665 | |
5f5c8ee5 GM |
1666 | for (i = 0; i < matrix->nrows; ++i) |
1667 | for (j = 0; j < matrix->nrows; ++j) | |
1668 | xassert (i == j | |
1669 | || (matrix->rows[i].glyphs[TEXT_AREA] | |
1670 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1671 | } | |
1672 | ||
1673 | ||
1674 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1675 | ||
1676 | struct glyph_row * | |
1677 | matrix_row (matrix, row) | |
1678 | struct glyph_matrix *matrix; | |
1679 | int row; | |
1680 | { | |
1681 | xassert (matrix && matrix->rows); | |
1682 | xassert (row >= 0 && row < matrix->nrows); | |
1683 | ||
1684 | /* That's really too slow for normal testing because this function | |
1685 | is called almost everywhere. Although---it's still astonishingly | |
1686 | fast, so it is valuable to have for debugging purposes. */ | |
1687 | #if 0 | |
1688 | check_matrix_pointer_lossage (matrix); | |
1689 | #endif | |
177c0ea7 | 1690 | |
5f5c8ee5 GM |
1691 | return matrix->rows + row; |
1692 | } | |
1693 | ||
1694 | ||
1695 | #if 0 /* This function makes invalid assumptions when text is | |
1696 | partially invisible. But it might come handy for debugging | |
1697 | nevertheless. */ | |
1698 | ||
1699 | /* Check invariants that must hold for an up to date current matrix of | |
1700 | window W. */ | |
1701 | ||
1702 | static void | |
1703 | check_matrix_invariants (w) | |
1704 | struct window *w; | |
1705 | { | |
1706 | struct glyph_matrix *matrix = w->current_matrix; | |
1707 | int yb = window_text_bottom_y (w); | |
1708 | struct glyph_row *row = matrix->rows; | |
1709 | struct glyph_row *last_text_row = NULL; | |
1710 | struct buffer *saved = current_buffer; | |
1711 | struct buffer *buffer = XBUFFER (w->buffer); | |
1712 | int c; | |
177c0ea7 | 1713 | |
5f5c8ee5 GM |
1714 | /* This can sometimes happen for a fresh window. */ |
1715 | if (matrix->nrows < 2) | |
1716 | return; | |
1717 | ||
1718 | set_buffer_temp (buffer); | |
1719 | ||
1720 | /* Note: last row is always reserved for the mode line. */ | |
1721 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1722 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1723 | { | |
1724 | struct glyph_row *next = row + 1; | |
1725 | ||
1726 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1727 | last_text_row = row; | |
1728 | ||
1729 | /* Check that character and byte positions are in sync. */ | |
1730 | xassert (MATRIX_ROW_START_BYTEPOS (row) | |
1731 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); | |
1732 | ||
1733 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1734 | have such a position temporarily in case of a minibuffer | |
1735 | displaying something like `[Sole completion]' at its end. */ | |
1736 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
1737 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1738 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); | |
1739 | ||
1740 | /* Check that end position of `row' is equal to start position | |
1741 | of next row. */ | |
1742 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1743 | { | |
1744 | xassert (MATRIX_ROW_END_CHARPOS (row) | |
1745 | == MATRIX_ROW_START_CHARPOS (next)); | |
1746 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1747 | == MATRIX_ROW_START_BYTEPOS (next)); | |
1748 | } | |
1749 | row = next; | |
1750 | } | |
1751 | ||
1752 | xassert (w->current_matrix->nrows == w->desired_matrix->nrows); | |
1753 | xassert (w->desired_matrix->rows != NULL); | |
1754 | set_buffer_temp (saved); | |
1755 | } | |
1756 | ||
1757 | #endif /* 0 */ | |
1758 | ||
1759 | #endif /* GLYPH_DEBUG != 0 */ | |
1760 | ||
1761 | ||
1762 | \f | |
1763 | /********************************************************************** | |
1764 | Allocating/ Adjusting Glyph Matrices | |
1765 | **********************************************************************/ | |
1766 | ||
1767 | /* Allocate glyph matrices over a window tree for a frame-based | |
1768 | redisplay | |
1769 | ||
1770 | X and Y are column/row within the frame glyph matrix where | |
1771 | sub-matrices for the window tree rooted at WINDOW must be | |
1772 | allocated. CH_DIM contains the dimensions of the smallest | |
1773 | character that could be used during display. DIM_ONLY_P non-zero | |
1774 | means that the caller of this function is only interested in the | |
1775 | result matrix dimension, and matrix adjustments should not be | |
1776 | performed. | |
1777 | ||
1778 | The function returns the total width/height of the sub-matrices of | |
1779 | the window tree. If called on a frame root window, the computation | |
1780 | will take the mini-buffer window into account. | |
1781 | ||
1782 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1783 | ||
1784 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1785 | glyph matrices yet, and | |
1786 | ||
1787 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1788 | any window in the tree will be changed or have been changed (see | |
153a073c | 1789 | DIM_ONLY_P) |
5f5c8ee5 GM |
1790 | |
1791 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1792 | function. | |
1793 | ||
1794 | Windows are arranged into chains of windows on the same level | |
1795 | through the next fields of window structures. Such a level can be | |
1796 | either a sequence of horizontally adjacent windows from left to | |
1797 | right, or a sequence of vertically adjacent windows from top to | |
1798 | bottom. Each window in a horizontal sequence can be either a leaf | |
1799 | window or a vertical sequence; a window in a vertical sequence can | |
1800 | be either a leaf or a horizontal sequence. All windows in a | |
1801 | horizontal sequence have the same height, and all windows in a | |
1802 | vertical sequence have the same width. | |
1803 | ||
1804 | This function uses, for historical reasons, a more general | |
1805 | algorithm to determine glyph matrix dimensions that would be | |
1806 | necessary. | |
1807 | ||
1808 | The matrix height of a horizontal sequence is determined by the | |
1809 | maximum height of any matrix in the sequence. The matrix width of | |
1810 | a horizontal sequence is computed by adding up matrix widths of | |
1811 | windows in the sequence. | |
1812 | ||
1813 | |<------- result width ------->| | |
1814 | +---------+----------+---------+ --- | |
1815 | | | | | | | |
1816 | | | | | | |
1817 | +---------+ | | result height | |
1818 | | +---------+ | |
1819 | | | | | |
1820 | +----------+ --- | |
1821 | ||
1822 | The matrix width of a vertical sequence is the maximum matrix width | |
1823 | of any window in the sequence. Its height is computed by adding up | |
1824 | matrix heights of windows in the sequence. | |
1825 | ||
1826 | |<---- result width -->| | |
1827 | +---------+ --- | |
1828 | | | | | |
1829 | | | | | |
1830 | +---------+--+ | | |
1831 | | | | | |
1832 | | | result height | |
1833 | | | | |
1834 | +------------+---------+ | | |
1835 | | | | | |
1836 | | | | | |
1837 | +------------+---------+ --- */ | |
1838 | ||
1839 | /* Bit indicating that a new matrix will be allocated or has been | |
1840 | allocated. */ | |
1841 | ||
1842 | #define NEW_LEAF_MATRIX (1 << 0) | |
1843 | ||
1844 | /* Bit indicating that a matrix will or has changed its location or | |
1845 | size. */ | |
1846 | ||
1847 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1848 | ||
1849 | static struct dim | |
5d3cc43c GM |
1850 | allocate_matrices_for_frame_redisplay (window, x, y, dim_only_p, |
1851 | window_change_flags) | |
5f5c8ee5 GM |
1852 | Lisp_Object window; |
1853 | int x, y; | |
5f5c8ee5 GM |
1854 | int dim_only_p; |
1855 | int *window_change_flags; | |
1856 | { | |
1857 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1858 | int x0 = x, y0 = y; | |
1859 | int wmax = 0, hmax = 0; | |
1860 | struct dim total; | |
1861 | struct dim dim; | |
1862 | struct window *w; | |
1863 | int in_horz_combination_p; | |
1864 | ||
1865 | /* What combination is WINDOW part of? Compute this once since the | |
1866 | result is the same for all windows in the `next' chain. The | |
1867 | special case of a root window (parent equal to nil) is treated | |
1868 | like a vertical combination because a root window's `next' | |
1869 | points to the mini-buffer window, if any, which is arranged | |
1870 | vertically below other windows. */ | |
1871 | in_horz_combination_p | |
1872 | = (!NILP (XWINDOW (window)->parent) | |
1873 | && !NILP (XWINDOW (XWINDOW (window)->parent)->hchild)); | |
1874 | ||
1875 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1876 | do |
5f5c8ee5 GM |
1877 | { |
1878 | w = XWINDOW (window); | |
1879 | ||
1880 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1881 | on whether this is a combination or a leaf window. */ |
5f5c8ee5 | 1882 | if (!NILP (w->hchild)) |
177c0ea7 | 1883 | dim = allocate_matrices_for_frame_redisplay (w->hchild, x, y, |
5f5c8ee5 GM |
1884 | dim_only_p, |
1885 | window_change_flags); | |
1886 | else if (!NILP (w->vchild)) | |
177c0ea7 | 1887 | dim = allocate_matrices_for_frame_redisplay (w->vchild, x, y, |
5f5c8ee5 GM |
1888 | dim_only_p, |
1889 | window_change_flags); | |
1890 | else | |
1891 | { | |
1892 | /* If not already done, allocate sub-matrix structures. */ | |
1893 | if (w->desired_matrix == NULL) | |
1894 | { | |
1895 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1896 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1897 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1898 | } | |
177c0ea7 | 1899 | |
5f5c8ee5 GM |
1900 | /* Width and height MUST be chosen so that there are no |
1901 | holes in the frame matrix. */ | |
5d3cc43c GM |
1902 | dim.width = required_matrix_width (w); |
1903 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1904 | |
1905 | /* Will matrix be re-allocated? */ | |
1906 | if (x != w->desired_matrix->matrix_x | |
1907 | || y != w->desired_matrix->matrix_y | |
1908 | || dim.width != w->desired_matrix->matrix_w | |
1909 | || dim.height != w->desired_matrix->matrix_h | |
1910 | || (margin_glyphs_to_reserve (w, dim.width, | |
7df02016 | 1911 | w->right_margin_cols) |
5f5c8ee5 GM |
1912 | != w->desired_matrix->left_margin_glyphs) |
1913 | || (margin_glyphs_to_reserve (w, dim.width, | |
7df02016 | 1914 | w->left_margin_cols) |
5f5c8ee5 GM |
1915 | != w->desired_matrix->right_margin_glyphs)) |
1916 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1917 | ||
1918 | /* Actually change matrices, if allowed. Do not consider | |
1919 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1920 | may have been changed which we don't now here. We trust | |
1921 | that we only will be called with DIM_ONLY_P != 0 when | |
1922 | necessary. */ | |
1923 | if (!dim_only_p) | |
1924 | { | |
1925 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1926 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1927 | } | |
1928 | } | |
1929 | ||
1930 | /* If we are part of a horizontal combination, advance x for | |
1931 | windows to the right of W; otherwise advance y for windows | |
1932 | below W. */ | |
1933 | if (in_horz_combination_p) | |
1934 | x += dim.width; | |
177c0ea7 | 1935 | else |
5f5c8ee5 GM |
1936 | y += dim.height; |
1937 | ||
1938 | /* Remember maximum glyph matrix dimensions. */ | |
1939 | wmax = max (wmax, dim.width); | |
1940 | hmax = max (hmax, dim.height); | |
1941 | ||
1942 | /* Next window on same level. */ | |
1943 | window = w->next; | |
1944 | } | |
1945 | while (!NILP (window)); | |
1946 | ||
1947 | /* Set `total' to the total glyph matrix dimension of this window | |
1948 | level. In a vertical combination, the width is the width of the | |
1949 | widest window; the height is the y we finally reached, corrected | |
1950 | by the y we started with. In a horizontal combination, the total | |
1951 | height is the height of the tallest window, and the width is the | |
1952 | x we finally reached, corrected by the x we started with. */ | |
1953 | if (in_horz_combination_p) | |
1954 | { | |
1955 | total.width = x - x0; | |
1956 | total.height = hmax; | |
1957 | } | |
177c0ea7 | 1958 | else |
5f5c8ee5 GM |
1959 | { |
1960 | total.width = wmax; | |
1961 | total.height = y - y0; | |
1962 | } | |
1963 | ||
1964 | return total; | |
1965 | } | |
1966 | ||
1967 | ||
5d3cc43c GM |
1968 | /* Return the required height of glyph matrices for window W. */ |
1969 | ||
1970 | int | |
1971 | required_matrix_height (w) | |
1972 | struct window *w; | |
1973 | { | |
1974 | #ifdef HAVE_WINDOW_SYSTEM | |
1975 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 1976 | |
5d3cc43c GM |
1977 | if (FRAME_WINDOW_P (f)) |
1978 | { | |
1979 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1980 | int window_pixel_height = window_box_height (w) + abs (w->vscroll); | |
1981 | return (((window_pixel_height + ch_height - 1) | |
1982 | / ch_height) | |
1983 | /* One partially visible line at the top and | |
1984 | bottom of the window. */ | |
1985 | + 2 | |
153a073c | 1986 | /* 2 for header and mode line. */ |
5d3cc43c GM |
1987 | + 2); |
1988 | } | |
1989 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 1990 | |
7df02016 | 1991 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
1992 | } |
1993 | ||
1994 | ||
1995 | /* Return the required width of glyph matrices for window W. */ | |
1996 | ||
1997 | int | |
1998 | required_matrix_width (w) | |
1999 | struct window *w; | |
2000 | { | |
2001 | #ifdef HAVE_WINDOW_SYSTEM | |
2002 | struct frame *f = XFRAME (w->frame); | |
2003 | if (FRAME_WINDOW_P (f)) | |
2004 | { | |
2005 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 2006 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 2007 | |
5d3cc43c GM |
2008 | /* Compute number of glyphs needed in a glyph row. */ |
2009 | return (((window_pixel_width + ch_width - 1) | |
2010 | / ch_width) | |
2011 | /* 2 partially visible columns in the text area. */ | |
2012 | + 2 | |
2013 | /* One partially visible column at the right | |
2014 | edge of each marginal area. */ | |
2015 | + 1 + 1); | |
2016 | } | |
2017 | #endif /* HAVE_WINDOW_SYSTEM */ | |
2018 | ||
7df02016 | 2019 | return XINT (w->total_cols); |
5d3cc43c GM |
2020 | } |
2021 | ||
2022 | ||
5f5c8ee5 GM |
2023 | /* Allocate window matrices for window-based redisplay. W is the |
2024 | window whose matrices must be allocated/reallocated. CH_DIM is the | |
2025 | size of the smallest character that could potentially be used on W. */ | |
177c0ea7 | 2026 | |
5f5c8ee5 | 2027 | static void |
5d3cc43c | 2028 | allocate_matrices_for_window_redisplay (w) |
5f5c8ee5 | 2029 | struct window *w; |
5f5c8ee5 | 2030 | { |
5f5c8ee5 GM |
2031 | while (w) |
2032 | { | |
2033 | if (!NILP (w->vchild)) | |
5d3cc43c | 2034 | allocate_matrices_for_window_redisplay (XWINDOW (w->vchild)); |
5f5c8ee5 | 2035 | else if (!NILP (w->hchild)) |
5d3cc43c | 2036 | allocate_matrices_for_window_redisplay (XWINDOW (w->hchild)); |
5f5c8ee5 GM |
2037 | else |
2038 | { | |
2039 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
2040 | struct dim dim; |
2041 | ||
2042 | /* If matrices are not yet allocated, allocate them now. */ | |
2043 | if (w->desired_matrix == NULL) | |
2044 | { | |
2045 | w->desired_matrix = new_glyph_matrix (NULL); | |
2046 | w->current_matrix = new_glyph_matrix (NULL); | |
2047 | } | |
2048 | ||
5d3cc43c GM |
2049 | dim.width = required_matrix_width (w); |
2050 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
2051 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
2052 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
2053 | } | |
177c0ea7 | 2054 | |
5f5c8ee5 GM |
2055 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
2056 | } | |
2057 | } | |
2058 | ||
2059 | ||
2060 | /* Re-allocate/ re-compute glyph matrices on frame F. If F is null, | |
2061 | do it for all frames; otherwise do it just for the given frame. | |
2062 | This function must be called when a new frame is created, its size | |
2063 | changes, or its window configuration changes. */ | |
2064 | ||
2065 | void | |
2066 | adjust_glyphs (f) | |
2067 | struct frame *f; | |
2068 | { | |
408f5064 GM |
2069 | /* Block input so that expose events and other events that access |
2070 | glyph matrices are not processed while we are changing them. */ | |
2071 | BLOCK_INPUT; | |
2072 | ||
5f5c8ee5 GM |
2073 | if (f) |
2074 | adjust_frame_glyphs (f); | |
2075 | else | |
2076 | { | |
2077 | Lisp_Object tail, lisp_frame; | |
177c0ea7 | 2078 | |
5f5c8ee5 GM |
2079 | FOR_EACH_FRAME (tail, lisp_frame) |
2080 | adjust_frame_glyphs (XFRAME (lisp_frame)); | |
2081 | } | |
408f5064 GM |
2082 | |
2083 | UNBLOCK_INPUT; | |
5f5c8ee5 GM |
2084 | } |
2085 | ||
2086 | ||
2087 | /* Adjust frame glyphs when Emacs is initialized. | |
177c0ea7 JB |
2088 | |
2089 | To be called from init_display. | |
2090 | ||
5f5c8ee5 GM |
2091 | We need a glyph matrix because redraw will happen soon. |
2092 | Unfortunately, window sizes on selected_frame are not yet set to | |
2093 | meaningful values. I believe we can assume that there are only two | |
2094 | windows on the frame---the mini-buffer and the root window. Frame | |
2095 | height and width seem to be correct so far. So, set the sizes of | |
2096 | windows to estimated values. */ | |
2097 | ||
2098 | static void | |
2099 | adjust_frame_glyphs_initially () | |
2100 | { | |
91fb7e1b GM |
2101 | struct frame *sf = SELECTED_FRAME (); |
2102 | struct window *root = XWINDOW (sf->root_window); | |
5f5c8ee5 | 2103 | struct window *mini = XWINDOW (root->next); |
7df02016 KS |
2104 | int frame_lines = FRAME_LINES (sf); |
2105 | int frame_cols = FRAME_COLS (sf); | |
91fb7e1b | 2106 | int top_margin = FRAME_TOP_MARGIN (sf); |
5f5c8ee5 GM |
2107 | |
2108 | /* Do it for the root window. */ | |
7df02016 KS |
2109 | XSETFASTINT (root->top_line, top_margin); |
2110 | XSETFASTINT (root->total_cols, frame_cols); | |
2111 | set_window_height (sf->root_window, frame_lines - 1 - top_margin, 0); | |
5f5c8ee5 GM |
2112 | |
2113 | /* Do it for the mini-buffer window. */ | |
7df02016 KS |
2114 | XSETFASTINT (mini->top_line, frame_lines - 1); |
2115 | XSETFASTINT (mini->total_cols, frame_cols); | |
5f5c8ee5 GM |
2116 | set_window_height (root->next, 1, 0); |
2117 | ||
91fb7e1b | 2118 | adjust_frame_glyphs (sf); |
5f5c8ee5 GM |
2119 | glyphs_initialized_initially_p = 1; |
2120 | } | |
177c0ea7 | 2121 | |
5f5c8ee5 GM |
2122 | |
2123 | /* Allocate/reallocate glyph matrices of a single frame F. */ | |
2124 | ||
2125 | static void | |
2126 | adjust_frame_glyphs (f) | |
2127 | struct frame *f; | |
2128 | { | |
2129 | if (FRAME_WINDOW_P (f)) | |
2130 | adjust_frame_glyphs_for_window_redisplay (f); | |
2131 | else | |
2132 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 2133 | |
5f5c8ee5 GM |
2134 | /* Don't forget the message buffer and the buffer for |
2135 | decode_mode_spec. */ | |
2136 | adjust_frame_message_buffer (f); | |
2137 | adjust_decode_mode_spec_buffer (f); | |
2138 | ||
2139 | f->glyphs_initialized_p = 1; | |
2140 | } | |
2141 | ||
2142 | ||
c9f00270 GM |
2143 | /* In the window tree with root W, build current matrices of leaf |
2144 | windows from the frame's current matrix. */ | |
2145 | ||
2146 | static void | |
2147 | fake_current_matrices (window) | |
2148 | Lisp_Object window; | |
2149 | { | |
2150 | struct window *w; | |
177c0ea7 | 2151 | |
c9f00270 GM |
2152 | for (; !NILP (window); window = w->next) |
2153 | { | |
2154 | w = XWINDOW (window); | |
177c0ea7 | 2155 | |
c9f00270 GM |
2156 | if (!NILP (w->hchild)) |
2157 | fake_current_matrices (w->hchild); | |
2158 | else if (!NILP (w->vchild)) | |
2159 | fake_current_matrices (w->vchild); | |
2160 | else | |
2161 | { | |
2162 | int i; | |
2163 | struct frame *f = XFRAME (w->frame); | |
2164 | struct glyph_matrix *m = w->current_matrix; | |
2165 | struct glyph_matrix *fm = f->current_matrix; | |
2166 | ||
7df02016 KS |
2167 | xassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
2168 | xassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 2169 | |
c9f00270 GM |
2170 | for (i = 0; i < m->matrix_h; ++i) |
2171 | { | |
2172 | struct glyph_row *r = m->rows + i; | |
7df02016 | 2173 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 GM |
2174 | |
2175 | xassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] | |
2176 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); | |
2177 | ||
2178 | r->enabled_p = fr->enabled_p; | |
2179 | if (r->enabled_p) | |
2180 | { | |
2181 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
2182 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
2183 | r->used[TEXT_AREA] = (m->matrix_w | |
2184 | - r->used[LEFT_MARGIN_AREA] | |
2185 | - r->used[RIGHT_MARGIN_AREA]); | |
2186 | r->mode_line_p = 0; | |
c9f00270 GM |
2187 | } |
2188 | } | |
2189 | } | |
2190 | } | |
2191 | } | |
2192 | ||
2193 | ||
bccee4f2 | 2194 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 2195 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 2196 | |
bccee4f2 GM |
2197 | static struct glyph_matrix * |
2198 | save_current_matrix (f) | |
31798cfe | 2199 | struct frame *f; |
c9f00270 | 2200 | { |
bccee4f2 GM |
2201 | int i; |
2202 | struct glyph_matrix *saved; | |
e797dea6 | 2203 | |
bccee4f2 GM |
2204 | saved = (struct glyph_matrix *) xmalloc (sizeof *saved); |
2205 | bzero (saved, sizeof *saved); | |
2206 | saved->nrows = f->current_matrix->nrows; | |
2207 | saved->rows = (struct glyph_row *) xmalloc (saved->nrows | |
2208 | * sizeof *saved->rows); | |
2209 | bzero (saved->rows, saved->nrows * sizeof *saved->rows); | |
2210 | ||
2211 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 2212 | { |
bccee4f2 GM |
2213 | struct glyph_row *from = f->current_matrix->rows + i; |
2214 | struct glyph_row *to = saved->rows + i; | |
2215 | size_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); | |
2216 | to->glyphs[TEXT_AREA] = (struct glyph *) xmalloc (nbytes); | |
2217 | bcopy (from->glyphs[TEXT_AREA], to->glyphs[TEXT_AREA], nbytes); | |
2218 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; | |
e797dea6 | 2219 | } |
bccee4f2 GM |
2220 | |
2221 | return saved; | |
2222 | } | |
2223 | ||
2224 | ||
2225 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
2226 | and free memory associated with SAVED. */ | |
2227 | ||
2228 | static void | |
2229 | restore_current_matrix (f, saved) | |
2230 | struct frame *f; | |
2231 | struct glyph_matrix *saved; | |
2232 | { | |
2233 | int i; | |
2234 | ||
2235 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 2236 | { |
bccee4f2 GM |
2237 | struct glyph_row *from = saved->rows + i; |
2238 | struct glyph_row *to = f->current_matrix->rows + i; | |
e797dea6 GM |
2239 | size_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
2240 | bcopy (from->glyphs[TEXT_AREA], to->glyphs[TEXT_AREA], nbytes); | |
2241 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; | |
bccee4f2 | 2242 | xfree (from->glyphs[TEXT_AREA]); |
e797dea6 | 2243 | } |
177c0ea7 | 2244 | |
bccee4f2 GM |
2245 | xfree (saved->rows); |
2246 | xfree (saved); | |
c9f00270 GM |
2247 | } |
2248 | ||
2249 | ||
bccee4f2 | 2250 | |
5f5c8ee5 GM |
2251 | /* Allocate/reallocate glyph matrices of a single frame F for |
2252 | frame-based redisplay. */ | |
2253 | ||
2254 | static void | |
2255 | adjust_frame_glyphs_for_frame_redisplay (f) | |
2256 | struct frame *f; | |
2257 | { | |
2258 | struct dim ch_dim; | |
2259 | struct dim matrix_dim; | |
2260 | int pool_changed_p; | |
2261 | int window_change_flags; | |
2262 | int top_window_y; | |
2263 | ||
2264 | if (!FRAME_LIVE_P (f)) | |
2265 | return; | |
2266 | ||
2267 | /* Determine the smallest character in any font for F. On | |
2268 | console windows, all characters have dimension (1, 1). */ | |
2269 | ch_dim.width = ch_dim.height = 1; | |
177c0ea7 | 2270 | |
5f5c8ee5 GM |
2271 | top_window_y = FRAME_TOP_MARGIN (f); |
2272 | ||
2273 | /* Allocate glyph pool structures if not already done. */ | |
2274 | if (f->desired_pool == NULL) | |
2275 | { | |
2276 | f->desired_pool = new_glyph_pool (); | |
2277 | f->current_pool = new_glyph_pool (); | |
2278 | } | |
2279 | ||
2280 | /* Allocate frames matrix structures if needed. */ | |
2281 | if (f->desired_matrix == NULL) | |
2282 | { | |
2283 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
2284 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
2285 | } | |
177c0ea7 | 2286 | |
5f5c8ee5 GM |
2287 | /* Compute window glyph matrices. (This takes the mini-buffer |
2288 | window into account). The result is the size of the frame glyph | |
2289 | matrix needed. The variable window_change_flags is set to a bit | |
2290 | mask indicating whether new matrices will be allocated or | |
2291 | existing matrices change their size or location within the frame | |
2292 | matrix. */ | |
2293 | window_change_flags = 0; | |
2294 | matrix_dim | |
2295 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
2296 | 0, top_window_y, | |
5d3cc43c | 2297 | 1, |
5f5c8ee5 GM |
2298 | &window_change_flags); |
2299 | ||
2300 | /* Add in menu bar lines, if any. */ | |
2301 | matrix_dim.height += top_window_y; | |
2302 | ||
2303 | /* Enlarge pools as necessary. */ | |
2304 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
2305 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
2306 | ||
177c0ea7 | 2307 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
2308 | absolutely necessary since it requires a frame redraw. */ |
2309 | if (pool_changed_p || window_change_flags) | |
2310 | { | |
2311 | /* Do it for window matrices. */ | |
2312 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 2313 | 0, top_window_y, 0, |
5f5c8ee5 GM |
2314 | &window_change_flags); |
2315 | ||
2316 | /* Size of frame matrices must equal size of frame. Note | |
2317 | that we are called for X frames with window widths NOT equal | |
2318 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
7df02016 KS |
2319 | xassert (matrix_dim.width == FRAME_COLS (f) |
2320 | && matrix_dim.height == FRAME_LINES (f)); | |
177c0ea7 | 2321 | |
e797dea6 GM |
2322 | /* Pointers to glyph memory in glyph rows are exchanged during |
2323 | the update phase of redisplay, which means in general that a | |
2324 | frame's current matrix consists of pointers into both the | |
2325 | desired and current glyph pool of the frame. Adjusting a | |
2326 | matrix sets the frame matrix up so that pointers are all into | |
2327 | the same pool. If we want to preserve glyph contents of the | |
2328 | current matrix over a call to adjust_glyph_matrix, we must | |
2329 | make a copy of the current glyphs, and restore the current | |
2330 | matrix' contents from that copy. */ | |
2331 | if (display_completed | |
2332 | && !FRAME_GARBAGED_P (f) | |
2333 | && matrix_dim.width == f->current_matrix->matrix_w | |
2334 | && matrix_dim.height == f->current_matrix->matrix_h) | |
2335 | { | |
bccee4f2 GM |
2336 | struct glyph_matrix *copy = save_current_matrix (f); |
2337 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2338 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2339 | restore_current_matrix (f, copy); |
e797dea6 GM |
2340 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2341 | } | |
c9f00270 | 2342 | else |
e797dea6 | 2343 | { |
bccee4f2 | 2344 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2345 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2346 | SET_FRAME_GARBAGED (f); | |
2347 | } | |
5f5c8ee5 GM |
2348 | } |
2349 | } | |
2350 | ||
2351 | ||
2352 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2353 | window-based redisplay. */ | |
2354 | ||
2355 | static void | |
2356 | adjust_frame_glyphs_for_window_redisplay (f) | |
2357 | struct frame *f; | |
2358 | { | |
2359 | struct dim ch_dim; | |
2360 | struct window *w; | |
2361 | ||
2362 | xassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); | |
177c0ea7 | 2363 | |
5f5c8ee5 GM |
2364 | /* Get minimum sizes. */ |
2365 | #ifdef HAVE_WINDOW_SYSTEM | |
2366 | ch_dim.width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
2367 | ch_dim.height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
2368 | #else | |
2369 | ch_dim.width = ch_dim.height = 1; | |
2370 | #endif | |
177c0ea7 | 2371 | |
5f5c8ee5 | 2372 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2373 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
2374 | |
2375 | /* Allocate/ reallocate matrices of the dummy window used to display | |
2376 | the menu bar under X when no X toolkit support is available. */ | |
488dd4c4 | 2377 | #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2378 | { |
2379 | /* Allocate a dummy window if not already done. */ | |
2380 | if (NILP (f->menu_bar_window)) | |
2381 | { | |
2382 | f->menu_bar_window = make_window (); | |
2383 | w = XWINDOW (f->menu_bar_window); | |
2384 | XSETFRAME (w->frame, f); | |
2385 | w->pseudo_window_p = 1; | |
2386 | } | |
2387 | else | |
2388 | w = XWINDOW (f->menu_bar_window); | |
2389 | ||
2390 | /* Set window dimensions to frame dimensions and allocate or | |
2391 | adjust glyph matrices of W. */ | |
7df02016 KS |
2392 | XSETFASTINT (w->top_line, 0); |
2393 | XSETFASTINT (w->left_col, 0); | |
2394 | XSETFASTINT (w->total_lines, FRAME_MENU_BAR_LINES (f)); | |
2395 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
5d3cc43c | 2396 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 GM |
2397 | } |
2398 | #endif /* not USE_X_TOOLKIT */ | |
2399 | ||
488dd4c4 | 2400 | #ifndef USE_GTK |
9ea173e8 GM |
2401 | /* Allocate/ reallocate matrices of the tool bar window. If we |
2402 | don't have a tool bar window yet, make one. */ | |
2403 | if (NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2404 | { |
9ea173e8 GM |
2405 | f->tool_bar_window = make_window (); |
2406 | w = XWINDOW (f->tool_bar_window); | |
5f5c8ee5 GM |
2407 | XSETFRAME (w->frame, f); |
2408 | w->pseudo_window_p = 1; | |
2409 | } | |
2410 | else | |
9ea173e8 | 2411 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2412 | |
7df02016 KS |
2413 | XSETFASTINT (w->top_line, FRAME_MENU_BAR_LINES (f)); |
2414 | XSETFASTINT (w->left_col, 0); | |
2415 | XSETFASTINT (w->total_lines, FRAME_TOOL_BAR_LINES (f)); | |
2416 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
5d3cc43c | 2417 | allocate_matrices_for_window_redisplay (w); |
488dd4c4 | 2418 | #endif |
5f5c8ee5 GM |
2419 | } |
2420 | ||
2421 | ||
177c0ea7 | 2422 | /* Adjust/ allocate message buffer of frame F. |
5f5c8ee5 | 2423 | |
5f5c8ee5 GM |
2424 | Note that the message buffer is never freed. Since I could not |
2425 | find a free in 19.34, I assume that freeing it would be | |
2426 | problematic in some way and don't do it either. | |
2427 | ||
2428 | (Implementation note: It should be checked if we can free it | |
2429 | eventually without causing trouble). */ | |
2430 | ||
2431 | static void | |
2432 | adjust_frame_message_buffer (f) | |
2433 | struct frame *f; | |
2434 | { | |
2435 | int size = FRAME_MESSAGE_BUF_SIZE (f) + 1; | |
2436 | ||
2437 | if (FRAME_MESSAGE_BUF (f)) | |
2438 | { | |
2439 | char *buffer = FRAME_MESSAGE_BUF (f); | |
2440 | char *new_buffer = (char *) xrealloc (buffer, size); | |
5f5c8ee5 GM |
2441 | FRAME_MESSAGE_BUF (f) = new_buffer; |
2442 | } | |
2443 | else | |
2444 | FRAME_MESSAGE_BUF (f) = (char *) xmalloc (size); | |
2445 | } | |
2446 | ||
2447 | ||
2448 | /* Re-allocate buffer for decode_mode_spec on frame F. */ | |
2449 | ||
2450 | static void | |
2451 | adjust_decode_mode_spec_buffer (f) | |
2452 | struct frame *f; | |
2453 | { | |
2454 | f->decode_mode_spec_buffer | |
2455 | = (char *) xrealloc (f->decode_mode_spec_buffer, | |
2456 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
2457 | } | |
2458 | ||
2459 | ||
2460 | \f | |
2461 | /********************************************************************** | |
2462 | Freeing Glyph Matrices | |
2463 | **********************************************************************/ | |
2464 | ||
2465 | /* Free glyph memory for a frame F. F may be null. This function can | |
2466 | be called for the same frame more than once. The root window of | |
2467 | F may be nil when this function is called. This is the case when | |
2468 | the function is called when F is destroyed. */ | |
2469 | ||
2470 | void | |
2471 | free_glyphs (f) | |
2472 | struct frame *f; | |
2473 | { | |
2474 | if (f && f->glyphs_initialized_p) | |
2475 | { | |
42f55fe0 GM |
2476 | /* Block interrupt input so that we don't get surprised by an X |
2477 | event while we're in an inconsistent state. */ | |
2478 | BLOCK_INPUT; | |
5f5c8ee5 | 2479 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2480 | |
5f5c8ee5 GM |
2481 | /* Release window sub-matrices. */ |
2482 | if (!NILP (f->root_window)) | |
2483 | free_window_matrices (XWINDOW (f->root_window)); | |
2484 | ||
2485 | /* Free the dummy window for menu bars without X toolkit and its | |
2486 | glyph matrices. */ | |
2487 | if (!NILP (f->menu_bar_window)) | |
2488 | { | |
2489 | struct window *w = XWINDOW (f->menu_bar_window); | |
2490 | free_glyph_matrix (w->desired_matrix); | |
2491 | free_glyph_matrix (w->current_matrix); | |
2492 | w->desired_matrix = w->current_matrix = NULL; | |
2493 | f->menu_bar_window = Qnil; | |
2494 | } | |
2495 | ||
9ea173e8 GM |
2496 | /* Free the tool bar window and its glyph matrices. */ |
2497 | if (!NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2498 | { |
9ea173e8 | 2499 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2500 | free_glyph_matrix (w->desired_matrix); |
2501 | free_glyph_matrix (w->current_matrix); | |
2502 | w->desired_matrix = w->current_matrix = NULL; | |
9ea173e8 | 2503 | f->tool_bar_window = Qnil; |
5f5c8ee5 GM |
2504 | } |
2505 | ||
2506 | /* Release frame glyph matrices. Reset fields to zero in | |
2507 | case we are called a second time. */ | |
2508 | if (f->desired_matrix) | |
2509 | { | |
2510 | free_glyph_matrix (f->desired_matrix); | |
2511 | free_glyph_matrix (f->current_matrix); | |
2512 | f->desired_matrix = f->current_matrix = NULL; | |
2513 | } | |
2514 | ||
2515 | /* Release glyph pools. */ | |
2516 | if (f->desired_pool) | |
2517 | { | |
2518 | free_glyph_pool (f->desired_pool); | |
2519 | free_glyph_pool (f->current_pool); | |
2520 | f->desired_pool = f->current_pool = NULL; | |
2521 | } | |
177c0ea7 | 2522 | |
42f55fe0 | 2523 | UNBLOCK_INPUT; |
5f5c8ee5 GM |
2524 | } |
2525 | } | |
2526 | ||
2527 | ||
2528 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2529 | function may be called with a null pointer, and it may be called on | |
2530 | the same tree more than once. */ | |
2531 | ||
2532 | void | |
2533 | free_window_matrices (w) | |
2534 | struct window *w; | |
2535 | { | |
2536 | while (w) | |
2537 | { | |
2538 | if (!NILP (w->hchild)) | |
2539 | free_window_matrices (XWINDOW (w->hchild)); | |
2540 | else if (!NILP (w->vchild)) | |
2541 | free_window_matrices (XWINDOW (w->vchild)); | |
177c0ea7 | 2542 | else |
5f5c8ee5 GM |
2543 | { |
2544 | /* This is a leaf window. Free its memory and reset fields | |
2545 | to zero in case this function is called a second time for | |
2546 | W. */ | |
2547 | free_glyph_matrix (w->current_matrix); | |
2548 | free_glyph_matrix (w->desired_matrix); | |
2549 | w->current_matrix = w->desired_matrix = NULL; | |
2550 | } | |
2551 | ||
2552 | /* Next window on same level. */ | |
2553 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2554 | } | |
2555 | } | |
2556 | ||
2557 | ||
2558 | /* Check glyph memory leaks. This function is called from | |
2559 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2560 | exits. We therefore free all glyph memory for all active frames | |
2561 | explicitly and check that nothing is left allocated. */ | |
2562 | ||
2563 | void | |
2564 | check_glyph_memory () | |
2565 | { | |
2566 | Lisp_Object tail, frame; | |
2567 | ||
2568 | /* Free glyph memory for all frames. */ | |
2569 | FOR_EACH_FRAME (tail, frame) | |
2570 | free_glyphs (XFRAME (frame)); | |
2571 | ||
2572 | /* Check that nothing is left allocated. */ | |
2573 | if (glyph_matrix_count) | |
2574 | abort (); | |
2575 | if (glyph_pool_count) | |
2576 | abort (); | |
2577 | } | |
2578 | ||
2579 | ||
2580 | \f | |
2581 | /********************************************************************** | |
2582 | Building a Frame Matrix | |
2583 | **********************************************************************/ | |
2584 | ||
2585 | /* Most of the redisplay code works on glyph matrices attached to | |
2586 | windows. This is a good solution most of the time, but it is not | |
2587 | suitable for terminal code. Terminal output functions cannot rely | |
2588 | on being able to set an arbitrary terminal window. Instead they | |
2589 | must be provided with a view of the whole frame, i.e. the whole | |
2590 | screen. We build such a view by constructing a frame matrix from | |
2591 | window matrices in this section. | |
2592 | ||
2593 | Windows that must be updated have their must_be_update_p flag set. | |
2594 | For all such windows, their desired matrix is made part of the | |
2595 | desired frame matrix. For other windows, their current matrix is | |
2596 | made part of the desired frame matrix. | |
2597 | ||
2598 | +-----------------+----------------+ | |
2599 | | desired | desired | | |
2600 | | | | | |
2601 | +-----------------+----------------+ | |
2602 | | current | | |
2603 | | | | |
2604 | +----------------------------------+ | |
2605 | ||
2606 | Desired window matrices can be made part of the frame matrix in a | |
2607 | cheap way: We exploit the fact that the desired frame matrix and | |
2608 | desired window matrices share their glyph memory. This is not | |
2609 | possible for current window matrices. Their glyphs are copied to | |
2610 | the desired frame matrix. The latter is equivalent to | |
2611 | preserve_other_columns in the old redisplay. | |
2612 | ||
2613 | Used glyphs counters for frame matrix rows are the result of adding | |
2614 | up glyph lengths of the window matrices. A line in the frame | |
2615 | matrix is enabled, if a corresponding line in a window matrix is | |
2616 | enabled. | |
177c0ea7 | 2617 | |
5f5c8ee5 GM |
2618 | After building the desired frame matrix, it will be passed to |
2619 | terminal code, which will manipulate both the desired and current | |
2620 | frame matrix. Changes applied to the frame's current matrix have | |
2621 | to be visible in current window matrices afterwards, of course. | |
2622 | ||
2623 | This problem is solved like this: | |
2624 | ||
2625 | 1. Window and frame matrices share glyphs. Window matrices are | |
2626 | constructed in a way that their glyph contents ARE the glyph | |
2627 | contents needed in a frame matrix. Thus, any modification of | |
2628 | glyphs done in terminal code will be reflected in window matrices | |
2629 | automatically. | |
177c0ea7 | 2630 | |
5f5c8ee5 GM |
2631 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2632 | intercepted by hook functions so that corresponding row operations | |
2633 | on window matrices can be performed. This is necessary because we | |
2634 | use pointers to glyphs in glyph row structures. To satisfy the | |
2635 | assumption of point 1 above that glyphs are updated implicitly in | |
2636 | window matrices when they are manipulated via the frame matrix, | |
2637 | window and frame matrix must of course agree where to find the | |
2638 | glyphs for their rows. Possible manipulations that must be | |
2639 | mirrored are assignments of rows of the desired frame matrix to the | |
2640 | current frame matrix and scrolling the current frame matrix. */ | |
2641 | ||
2642 | /* Build frame F's desired matrix from window matrices. Only windows | |
2643 | which have the flag must_be_updated_p set have to be updated. Menu | |
2644 | bar lines of a frame are not covered by window matrices, so make | |
2645 | sure not to touch them in this function. */ | |
2646 | ||
2647 | static void | |
2648 | build_frame_matrix (f) | |
2649 | struct frame *f; | |
2650 | { | |
2651 | int i; | |
2652 | ||
2653 | /* F must have a frame matrix when this function is called. */ | |
2654 | xassert (!FRAME_WINDOW_P (f)); | |
177c0ea7 | 2655 | |
5f5c8ee5 GM |
2656 | /* Clear all rows in the frame matrix covered by window matrices. |
2657 | Menu bar lines are not covered by windows. */ | |
2658 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2659 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2660 | ||
2661 | /* Build the matrix by walking the window tree. */ | |
2662 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2663 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2664 | } | |
2665 | ||
2666 | ||
2667 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2668 | matrices. W is the root of a window tree. */ | |
2669 | ||
2670 | static void | |
2671 | build_frame_matrix_from_window_tree (matrix, w) | |
2672 | struct glyph_matrix *matrix; | |
2673 | struct window *w; | |
2674 | { | |
2675 | while (w) | |
2676 | { | |
2677 | if (!NILP (w->hchild)) | |
2678 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->hchild)); | |
2679 | else if (!NILP (w->vchild)) | |
2680 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->vchild)); | |
2681 | else | |
2682 | build_frame_matrix_from_leaf_window (matrix, w); | |
2683 | ||
2684 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2685 | } | |
2686 | } | |
2687 | ||
2688 | ||
2689 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2690 | desired frame matrix built. W is a leaf window whose desired or | |
2691 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2692 | must_be_updated_p determines which matrix it contributes to | |
2693 | FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix | |
2694 | is added to FRAME_MATRIX, otherwise W's current matrix is added. | |
2695 | Adding a desired matrix means setting up used counters and such in | |
2696 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2697 | means copying glyphs. The latter case corresponds to | |
2698 | preserve_other_columns in the old redisplay. */ | |
2699 | ||
2700 | static void | |
2701 | build_frame_matrix_from_leaf_window (frame_matrix, w) | |
2702 | struct glyph_matrix *frame_matrix; | |
2703 | struct window *w; | |
2704 | { | |
2705 | struct glyph_matrix *window_matrix; | |
2706 | int window_y, frame_y; | |
2707 | /* If non-zero, a glyph to insert at the right border of W. */ | |
2708 | GLYPH right_border_glyph = 0; | |
2709 | ||
2710 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2711 | if (w->must_be_updated_p) | |
2712 | { | |
2713 | window_matrix = w->desired_matrix; | |
2714 | ||
2715 | /* Decide whether we want to add a vertical border glyph. */ | |
2716 | if (!WINDOW_RIGHTMOST_P (w)) | |
2717 | { | |
2718 | struct Lisp_Char_Table *dp = window_display_table (w); | |
2719 | right_border_glyph = (dp && INTEGERP (DISP_BORDER_GLYPH (dp)) | |
2720 | ? XINT (DISP_BORDER_GLYPH (dp)) | |
2721 | : '|'); | |
2722 | } | |
2723 | } | |
2724 | else | |
2725 | window_matrix = w->current_matrix; | |
2726 | ||
2727 | /* For all rows in the window matrix and corresponding rows in the | |
2728 | frame matrix. */ | |
2729 | window_y = 0; | |
2730 | frame_y = window_matrix->matrix_y; | |
2731 | while (window_y < window_matrix->nrows) | |
2732 | { | |
2733 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2734 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
2a8bd25f | 2735 | int current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2736 | |
2737 | /* Fill up the frame row with spaces up to the left margin of the | |
2738 | window row. */ | |
2739 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2740 | ||
2741 | /* Fill up areas in the window matrix row with spaces. */ | |
2742 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2743 | |
2744 | /* If only part of W's desired matrix has been built, and | |
2745 | window_row wasn't displayed, use the corresponding current | |
2746 | row instead. */ | |
2747 | if (window_matrix == w->desired_matrix | |
2748 | && !window_row->enabled_p) | |
2749 | { | |
2750 | window_row = w->current_matrix->rows + window_y; | |
2751 | current_row_p = 1; | |
2752 | } | |
177c0ea7 | 2753 | |
2a8bd25f | 2754 | if (current_row_p) |
5f5c8ee5 | 2755 | { |
2a8bd25f | 2756 | /* Copy window row to frame row. */ |
5f5c8ee5 GM |
2757 | bcopy (window_row->glyphs[0], |
2758 | frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, | |
2759 | window_matrix->matrix_w * sizeof (struct glyph)); | |
2760 | } | |
2761 | else | |
2762 | { | |
2a8bd25f | 2763 | xassert (window_row->enabled_p); |
177c0ea7 | 2764 | |
2a8bd25f GM |
2765 | /* Only when a desired row has been displayed, we want |
2766 | the corresponding frame row to be updated. */ | |
2767 | frame_row->enabled_p = 1; | |
177c0ea7 | 2768 | |
5f5c8ee5 GM |
2769 | /* Maybe insert a vertical border between horizontally adjacent |
2770 | windows. */ | |
2771 | if (right_border_glyph) | |
2772 | { | |
2773 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2774 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2775 | } | |
2776 | ||
a13396c9 GM |
2777 | /* Window row window_y must be a slice of frame row |
2778 | frame_y. */ | |
5f5c8ee5 | 2779 | xassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2780 | |
5f5c8ee5 GM |
2781 | /* If rows are in sync, we don't have to copy glyphs because |
2782 | frame and window share glyphs. */ | |
177c0ea7 | 2783 | |
a38634ff GM |
2784 | #if GLYPH_DEBUG |
2785 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
9b0e97aa | 2786 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2787 | #endif |
5f5c8ee5 GM |
2788 | } |
2789 | ||
2790 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2791 | up with spaces, and visit leaf windows from left to right it | |
2792 | can be done simply. */ | |
177c0ea7 | 2793 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2794 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2795 | ||
5f5c8ee5 GM |
2796 | /* Next row. */ |
2797 | ++window_y; | |
2798 | ++frame_y; | |
2799 | } | |
2800 | } | |
2801 | ||
2802 | ||
2803 | /* Add spaces to a glyph row ROW in a window matrix. | |
2804 | ||
2805 | Each row has the form: | |
2806 | ||
2807 | +---------+-----------------------------+------------+ | |
2808 | | left | text | right | | |
2809 | +---------+-----------------------------+------------+ | |
2810 | ||
2811 | Left and right marginal areas are optional. This function adds | |
2812 | spaces to areas so that there are no empty holes between areas. | |
2813 | In other words: If the right area is not empty, the text area | |
2814 | is filled up with spaces up to the right area. If the text area | |
2815 | is not empty, the left area is filled up. | |
2816 | ||
2817 | To be called for frame-based redisplay, only. */ | |
2818 | ||
2819 | static void | |
2820 | fill_up_glyph_row_with_spaces (row) | |
2821 | struct glyph_row *row; | |
2822 | { | |
2823 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2824 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2825 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2826 | } | |
2827 | ||
2828 | ||
2829 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2830 | frame-based redisplay only. */ | |
2831 | ||
2832 | static void | |
2833 | fill_up_glyph_row_area_with_spaces (row, area) | |
2834 | struct glyph_row *row; | |
2835 | int area; | |
2836 | { | |
2837 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2838 | { | |
2839 | struct glyph *end = row->glyphs[area + 1]; | |
2840 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2841 | ||
2842 | while (text < end) | |
2843 | *text++ = space_glyph; | |
2844 | row->used[area] = text - row->glyphs[area]; | |
2845 | } | |
2846 | } | |
2847 | ||
2848 | ||
2849 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2850 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2851 | ||
2852 | static void | |
2853 | fill_up_frame_row_with_spaces (row, upto) | |
2854 | struct glyph_row *row; | |
2855 | int upto; | |
2856 | { | |
2857 | int i = row->used[TEXT_AREA]; | |
2858 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2859 | |
5f5c8ee5 GM |
2860 | while (i < upto) |
2861 | glyph[i++] = space_glyph; | |
2862 | ||
2863 | row->used[TEXT_AREA] = i; | |
2864 | } | |
2865 | ||
2866 | ||
2867 | \f | |
2868 | /********************************************************************** | |
2869 | Mirroring operations on frame matrices in window matrices | |
2870 | **********************************************************************/ | |
2871 | ||
2872 | /* Set frame being updated via frame-based redisplay to F. This | |
2873 | function must be called before updates to make explicit that we are | |
2874 | working on frame matrices or not. */ | |
2875 | ||
2876 | static INLINE void | |
2877 | set_frame_matrix_frame (f) | |
2878 | struct frame *f; | |
2879 | { | |
2880 | frame_matrix_frame = f; | |
2881 | } | |
2882 | ||
2883 | ||
2884 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2885 | DESIRED_MATRIX is the desired matrix corresponding to | |
2886 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2887 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2888 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2889 | done in frame matrices, and that we have to perform analogous | |
2890 | operations in window matrices of frame_matrix_frame. */ | |
2891 | ||
2892 | static INLINE void | |
2893 | make_current (desired_matrix, current_matrix, row) | |
2894 | struct glyph_matrix *desired_matrix, *current_matrix; | |
2895 | int row; | |
2896 | { | |
2897 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2898 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
e876ff42 | 2899 | int mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2900 | |
2901 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2902 | between both rows, and does a structure assignment otherwise. */ | |
2903 | assign_row (current_row, desired_row); | |
2904 | ||
2905 | /* Enable current_row to mark it as valid. */ | |
2906 | current_row->enabled_p = 1; | |
e876ff42 | 2907 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2908 | |
2909 | /* If we are called on frame matrices, perform analogous operations | |
2910 | for window matrices. */ | |
2911 | if (frame_matrix_frame) | |
2912 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); | |
2913 | } | |
2914 | ||
2915 | ||
2916 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2917 | W's frame which has been made current (by swapping pointers between | |
2918 | current and desired matrix). Perform analogous operations in the | |
2919 | matrices of leaf windows in the window tree rooted at W. */ | |
2920 | ||
2921 | static void | |
2922 | mirror_make_current (w, frame_row) | |
2923 | struct window *w; | |
2924 | int frame_row; | |
2925 | { | |
2926 | while (w) | |
2927 | { | |
2928 | if (!NILP (w->hchild)) | |
2929 | mirror_make_current (XWINDOW (w->hchild), frame_row); | |
2930 | else if (!NILP (w->vchild)) | |
2931 | mirror_make_current (XWINDOW (w->vchild), frame_row); | |
2932 | else | |
2933 | { | |
2934 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2935 | here because the checks performed in debug mode there | |
2936 | will not allow the conversion. */ | |
2937 | int row = frame_row - w->desired_matrix->matrix_y; | |
2938 | ||
2939 | /* If FRAME_ROW is within W, assign the desired row to the | |
2940 | current row (exchanging glyph pointers). */ | |
2941 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
2942 | { | |
2943 | struct glyph_row *current_row | |
2944 | = MATRIX_ROW (w->current_matrix, row); | |
2945 | struct glyph_row *desired_row | |
2946 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
2947 | |
2948 | if (desired_row->enabled_p) | |
2949 | assign_row (current_row, desired_row); | |
2950 | else | |
2951 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 GM |
2952 | current_row->enabled_p = 1; |
2953 | } | |
2954 | } | |
177c0ea7 | 2955 | |
5f5c8ee5 GM |
2956 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2957 | } | |
2958 | } | |
2959 | ||
2960 | ||
2961 | /* Perform row dance after scrolling. We are working on the range of | |
2962 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
2963 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
2964 | row I in the range 0 <= I < NLINES, the index of the original line | |
2965 | to move to I. This index is relative to the row range, i.e. 0 <= | |
2966 | index < NLINES. RETAINED_P is a vector containing zero for each | |
2967 | row 0 <= I < NLINES which is empty. | |
2968 | ||
2969 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 2970 | |
5f5c8ee5 GM |
2971 | void |
2972 | mirrored_line_dance (matrix, unchanged_at_top, nlines, copy_from, | |
2973 | retained_p) | |
2974 | struct glyph_matrix *matrix; | |
2975 | int unchanged_at_top, nlines; | |
2976 | int *copy_from; | |
2977 | char *retained_p; | |
2978 | { | |
2979 | /* A copy of original rows. */ | |
2980 | struct glyph_row *old_rows; | |
2981 | ||
2982 | /* Rows to assign to. */ | |
2983 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 2984 | |
5f5c8ee5 GM |
2985 | int i; |
2986 | ||
2987 | /* Make a copy of the original rows. */ | |
2988 | old_rows = (struct glyph_row *) alloca (nlines * sizeof *old_rows); | |
2989 | bcopy (new_rows, old_rows, nlines * sizeof *old_rows); | |
2990 | ||
2991 | /* Assign new rows, maybe clear lines. */ | |
2992 | for (i = 0; i < nlines; ++i) | |
2993 | { | |
2994 | int enabled_before_p = new_rows[i].enabled_p; | |
2995 | ||
2996 | xassert (i + unchanged_at_top < matrix->nrows); | |
2997 | xassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
2998 | new_rows[i] = old_rows[copy_from[i]]; | |
2999 | new_rows[i].enabled_p = enabled_before_p; | |
3000 | ||
3001 | /* RETAINED_P is zero for empty lines. */ | |
3002 | if (!retained_p[copy_from[i]]) | |
3003 | new_rows[i].enabled_p = 0; | |
3004 | } | |
3005 | ||
153a073c | 3006 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 GM |
3007 | if (frame_matrix_frame) |
3008 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), | |
3009 | unchanged_at_top, nlines, copy_from, retained_p); | |
3010 | } | |
3011 | ||
3012 | ||
a13396c9 | 3013 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 3014 | the current frame matrix. */ |
a13396c9 GM |
3015 | |
3016 | static void | |
3017 | sync_window_with_frame_matrix_rows (w) | |
3018 | struct window *w; | |
3019 | { | |
3020 | struct frame *f = XFRAME (w->frame); | |
3021 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
075c507b | 3022 | int left, right, x, width; |
a13396c9 | 3023 | |
5cb88111 | 3024 | /* Preconditions: W must be a leaf window on a tty frame. */ |
a13396c9 | 3025 | xassert (NILP (w->hchild) && NILP (w->vchild)); |
a13396c9 GM |
3026 | xassert (!FRAME_WINDOW_P (f)); |
3027 | ||
7df02016 KS |
3028 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
3029 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
3030 | x = w->current_matrix->matrix_x; |
3031 | width = w->current_matrix->matrix_w; | |
3032 | ||
a13396c9 GM |
3033 | window_row = w->current_matrix->rows; |
3034 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 3035 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 3036 | |
5cb88111 | 3037 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 3038 | { |
5cb88111 GM |
3039 | window_row->glyphs[LEFT_MARGIN_AREA] |
3040 | = frame_row->glyphs[0] + x; | |
3041 | window_row->glyphs[TEXT_AREA] | |
3042 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
3043 | window_row->glyphs[LAST_AREA] | |
3044 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
3045 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
3046 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
3047 | } |
3048 | } | |
3049 | ||
3050 | ||
3051 | /* Return the window in the window tree rooted in W containing frame | |
3052 | row ROW. Value is null if none is found. */ | |
3053 | ||
3054 | struct window * | |
3055 | frame_row_to_window (w, row) | |
3056 | struct window *w; | |
3057 | int row; | |
3058 | { | |
3059 | struct window *found = NULL; | |
177c0ea7 | 3060 | |
a13396c9 GM |
3061 | while (w && !found) |
3062 | { | |
3063 | if (!NILP (w->hchild)) | |
3064 | found = frame_row_to_window (XWINDOW (w->hchild), row); | |
3065 | else if (!NILP (w->vchild)) | |
3066 | found = frame_row_to_window (XWINDOW (w->vchild), row); | |
7df02016 KS |
3067 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
3068 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 3069 | found = w; |
177c0ea7 | 3070 | |
a13396c9 GM |
3071 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3072 | } | |
3073 | ||
3074 | return found; | |
3075 | } | |
3076 | ||
3077 | ||
5f5c8ee5 GM |
3078 | /* Perform a line dance in the window tree rooted at W, after |
3079 | scrolling a frame matrix in mirrored_line_dance. | |
3080 | ||
3081 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
3082 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
3083 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
3084 | I < NLINES, the index of the original line to move to I. This | |
3085 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
3086 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
3087 | which is empty. */ | |
3088 | ||
3089 | static void | |
3090 | mirror_line_dance (w, unchanged_at_top, nlines, copy_from, retained_p) | |
3091 | struct window *w; | |
3092 | int unchanged_at_top, nlines; | |
3093 | int *copy_from; | |
3094 | char *retained_p; | |
3095 | { | |
3096 | while (w) | |
3097 | { | |
3098 | if (!NILP (w->hchild)) | |
3099 | mirror_line_dance (XWINDOW (w->hchild), unchanged_at_top, | |
3100 | nlines, copy_from, retained_p); | |
3101 | else if (!NILP (w->vchild)) | |
3102 | mirror_line_dance (XWINDOW (w->vchild), unchanged_at_top, | |
3103 | nlines, copy_from, retained_p); | |
3104 | else | |
3105 | { | |
3106 | /* W is a leaf window, and we are working on its current | |
3107 | matrix m. */ | |
3108 | struct glyph_matrix *m = w->current_matrix; | |
a13396c9 | 3109 | int i, sync_p = 0; |
5f5c8ee5 GM |
3110 | struct glyph_row *old_rows; |
3111 | ||
3112 | /* Make a copy of the original rows of matrix m. */ | |
3113 | old_rows = (struct glyph_row *) alloca (m->nrows * sizeof *old_rows); | |
3114 | bcopy (m->rows, old_rows, m->nrows * sizeof *old_rows); | |
3115 | ||
3116 | for (i = 0; i < nlines; ++i) | |
3117 | { | |
3118 | /* Frame relative line assigned to. */ | |
3119 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 3120 | |
5f5c8ee5 GM |
3121 | /* Frame relative line assigned. */ |
3122 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 3123 | |
5f5c8ee5 GM |
3124 | /* Window relative line assigned to. */ |
3125 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 3126 | |
5f5c8ee5 GM |
3127 | /* Window relative line assigned. */ |
3128 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 3129 | |
5f5c8ee5 GM |
3130 | /* Is assigned line inside window? */ |
3131 | int from_inside_window_p | |
3132 | = window_from >= 0 && window_from < m->matrix_h; | |
177c0ea7 | 3133 | |
a13396c9 GM |
3134 | /* Is assigned to line inside window? */ |
3135 | int to_inside_window_p | |
3136 | = window_to >= 0 && window_to < m->matrix_h; | |
177c0ea7 | 3137 | |
a13396c9 | 3138 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 3139 | { |
5f5c8ee5 GM |
3140 | /* Enabled setting before assignment. */ |
3141 | int enabled_before_p; | |
177c0ea7 | 3142 | |
5f5c8ee5 GM |
3143 | /* Do the assignment. The enabled_p flag is saved |
3144 | over the assignment because the old redisplay did | |
3145 | that. */ | |
3146 | enabled_before_p = m->rows[window_to].enabled_p; | |
3147 | m->rows[window_to] = old_rows[window_from]; | |
3148 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 3149 | |
5f5c8ee5 GM |
3150 | /* If frame line is empty, window line is empty, too. */ |
3151 | if (!retained_p[copy_from[i]]) | |
3152 | m->rows[window_to].enabled_p = 0; | |
3153 | } | |
a13396c9 GM |
3154 | else if (to_inside_window_p) |
3155 | { | |
3156 | /* A copy between windows. This is an infrequent | |
3157 | case not worth optimizing. */ | |
3158 | struct frame *f = XFRAME (w->frame); | |
3159 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); | |
3160 | struct window *w2; | |
3161 | struct glyph_matrix *m2; | |
3162 | int m2_from; | |
3163 | ||
3164 | w2 = frame_row_to_window (root, frame_to); | |
3165 | m2 = w2->current_matrix; | |
3166 | m2_from = frame_from - m2->matrix_y; | |
3167 | copy_row_except_pointers (m->rows + window_to, | |
3168 | m2->rows + m2_from); | |
177c0ea7 | 3169 | |
a13396c9 GM |
3170 | /* If frame line is empty, window line is empty, too. */ |
3171 | if (!retained_p[copy_from[i]]) | |
3172 | m->rows[window_to].enabled_p = 0; | |
3173 | sync_p = 1; | |
3174 | } | |
3175 | else if (from_inside_window_p) | |
3176 | sync_p = 1; | |
5f5c8ee5 | 3177 | } |
a13396c9 GM |
3178 | |
3179 | /* If there was a copy between windows, make sure glyph | |
3180 | pointers are in sync with the frame matrix. */ | |
3181 | if (sync_p) | |
3182 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 3183 | |
5f5c8ee5 GM |
3184 | /* Check that no pointers are lost. */ |
3185 | CHECK_MATRIX (m); | |
3186 | } | |
3187 | ||
3188 | /* Next window on same level. */ | |
3189 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3190 | } | |
3191 | } | |
3192 | ||
3193 | ||
3194 | #if GLYPH_DEBUG | |
3195 | ||
3196 | /* Check that window and frame matrices agree about their | |
3197 | understanding where glyphs of the rows are to find. For each | |
3198 | window in the window tree rooted at W, check that rows in the | |
3199 | matrices of leaf window agree with their frame matrices about | |
3200 | glyph pointers. */ | |
3201 | ||
3202 | void | |
3203 | check_window_matrix_pointers (w) | |
3204 | struct window *w; | |
3205 | { | |
3206 | while (w) | |
3207 | { | |
3208 | if (!NILP (w->hchild)) | |
3209 | check_window_matrix_pointers (XWINDOW (w->hchild)); | |
3210 | else if (!NILP (w->vchild)) | |
3211 | check_window_matrix_pointers (XWINDOW (w->vchild)); | |
3212 | else | |
60a8948a | 3213 | { |
5f5c8ee5 GM |
3214 | struct frame *f = XFRAME (w->frame); |
3215 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); | |
3216 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 3217 | } |
177c0ea7 | 3218 | |
5f5c8ee5 GM |
3219 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3220 | } | |
3221 | } | |
3222 | ||
3223 | ||
3224 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
3225 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
3226 | each row in WINDOW_MATRIX check that it's a slice of the | |
3227 | corresponding frame row. If it isn't, abort. */ | |
3228 | ||
3229 | static void | |
3230 | check_matrix_pointers (window_matrix, frame_matrix) | |
3231 | struct glyph_matrix *window_matrix, *frame_matrix; | |
3232 | { | |
3233 | /* Row number in WINDOW_MATRIX. */ | |
3234 | int i = 0; | |
3235 | ||
3236 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
3237 | int j = window_matrix->matrix_y; | |
3238 | ||
177c0ea7 | 3239 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
3240 | slice of the row in the frame matrix. If it isn't we didn't |
3241 | mirror an operation on the frame matrix correctly. */ | |
3242 | while (i < window_matrix->nrows) | |
3243 | { | |
3244 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
3245 | frame_matrix->rows + j)) | |
3246 | abort (); | |
3247 | ++i, ++j; | |
3248 | } | |
3249 | } | |
3250 | ||
3251 | #endif /* GLYPH_DEBUG != 0 */ | |
3252 | ||
3253 | ||
3254 | \f | |
3255 | /********************************************************************** | |
3256 | VPOS and HPOS translations | |
3257 | **********************************************************************/ | |
3258 | ||
3259 | #if GLYPH_DEBUG | |
3260 | ||
3261 | /* Translate vertical position VPOS which is relative to window W to a | |
3262 | vertical position relative to W's frame. */ | |
3263 | ||
3264 | static int | |
3265 | window_to_frame_vpos (w, vpos) | |
3266 | struct window *w; | |
3267 | int vpos; | |
3268 | { | |
3269 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 3270 | |
5f5c8ee5 GM |
3271 | xassert (!FRAME_WINDOW_P (f)); |
3272 | xassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); | |
7df02016 KS |
3273 | vpos += WINDOW_TOP_EDGE_LINE (w); |
3274 | xassert (vpos >= 0 && vpos <= FRAME_LINES (f)); | |
5f5c8ee5 GM |
3275 | return vpos; |
3276 | } | |
3277 | ||
3278 | ||
3279 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 3280 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
3281 | |
3282 | static int | |
3283 | window_to_frame_hpos (w, hpos) | |
3284 | struct window *w; | |
3285 | int hpos; | |
3286 | { | |
3287 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 3288 | |
5f5c8ee5 | 3289 | xassert (!FRAME_WINDOW_P (f)); |
7df02016 | 3290 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
3291 | return hpos; |
3292 | } | |
177c0ea7 | 3293 | |
5f5c8ee5 GM |
3294 | #endif /* GLYPH_DEBUG */ |
3295 | ||
3296 | ||
3297 | \f | |
3298 | /********************************************************************** | |
3299 | Redrawing Frames | |
3300 | **********************************************************************/ | |
3301 | ||
3302 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, | |
7ee72033 MB |
3303 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. */) |
3304 | (frame) | |
5f5c8ee5 GM |
3305 | Lisp_Object frame; |
3306 | { | |
3307 | struct frame *f; | |
3308 | ||
b7826503 | 3309 | CHECK_LIVE_FRAME (frame); |
5f5c8ee5 GM |
3310 | f = XFRAME (frame); |
3311 | ||
3312 | /* Ignore redraw requests, if frame has no glyphs yet. | |
3313 | (Implementation note: It still has to be checked why we are | |
3314 | called so early here). */ | |
3315 | if (!glyphs_initialized_initially_p) | |
3316 | return Qnil; | |
3317 | ||
3318 | update_begin (f); | |
f2adda5e | 3319 | if (FRAME_MSDOS_P (f)) |
28d440ab | 3320 | set_terminal_modes (0); |
5f5c8ee5 GM |
3321 | clear_frame (); |
3322 | clear_current_matrices (f); | |
3323 | update_end (f); | |
3324 | fflush (stdout); | |
3325 | windows_or_buffers_changed++; | |
3326 | /* Mark all windows as inaccurate, so that every window will have | |
3327 | its redisplay done. */ | |
3328 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
3329 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
3330 | f->garbaged = 0; | |
3331 | return Qnil; | |
3332 | } | |
3333 | ||
3334 | ||
3335 | /* Redraw frame F. This is nothing more than a call to the Lisp | |
3336 | function redraw-frame. */ | |
3337 | ||
3338 | void | |
3339 | redraw_frame (f) | |
3340 | struct frame *f; | |
3341 | { | |
3342 | Lisp_Object frame; | |
3343 | XSETFRAME (frame, f); | |
3344 | Fredraw_frame (frame); | |
3345 | } | |
3346 | ||
3347 | ||
3348 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
7ee72033 MB |
3349 | doc: /* Clear and redisplay all visible frames. */) |
3350 | () | |
5f5c8ee5 GM |
3351 | { |
3352 | Lisp_Object tail, frame; | |
3353 | ||
3354 | FOR_EACH_FRAME (tail, frame) | |
3355 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
3356 | Fredraw_frame (frame); | |
3357 | ||
3358 | return Qnil; | |
3359 | } | |
3360 | ||
3361 | ||
3362 | /* This is used when frame_garbaged is set. Call Fredraw_frame on all | |
3363 | visible frames marked as garbaged. */ | |
3364 | ||
3365 | void | |
3366 | redraw_garbaged_frames () | |
3367 | { | |
3368 | Lisp_Object tail, frame; | |
3369 | ||
3370 | FOR_EACH_FRAME (tail, frame) | |
3371 | if (FRAME_VISIBLE_P (XFRAME (frame)) | |
3372 | && FRAME_GARBAGED_P (XFRAME (frame))) | |
3373 | Fredraw_frame (frame); | |
3374 | } | |
3375 | ||
3376 | ||
3377 | \f | |
3378 | /*********************************************************************** | |
3379 | Direct Operations | |
3380 | ***********************************************************************/ | |
3381 | ||
3382 | /* Try to update display and current glyph matrix directly. | |
3383 | ||
3384 | This function is called after a character G has been inserted into | |
3385 | current_buffer. It tries to update the current glyph matrix and | |
3386 | perform appropriate screen output to reflect the insertion. If it | |
3387 | succeeds, the global flag redisplay_performed_directly_p will be | |
3388 | set to 1, and thereby prevent the more costly general redisplay | |
3389 | from running (see redisplay_internal). | |
3390 | ||
3391 | This function is not called for `hairy' character insertions. | |
3392 | In particular, it is not called when after or before change | |
3393 | functions exist, like they are used by font-lock. See keyboard.c | |
3394 | for details where this function is called. */ | |
3395 | ||
3396 | int | |
3397 | direct_output_for_insert (g) | |
3398 | int g; | |
3399 | { | |
91fb7e1b | 3400 | register struct frame *f = SELECTED_FRAME (); |
5f5c8ee5 GM |
3401 | struct window *w = XWINDOW (selected_window); |
3402 | struct it it, it2; | |
3403 | struct glyph_row *glyph_row; | |
3404 | struct glyph *glyphs, *glyph, *end; | |
3405 | int n; | |
153a073c | 3406 | /* Non-null means that redisplay of W is based on window matrices. */ |
5f5c8ee5 GM |
3407 | int window_redisplay_p = FRAME_WINDOW_P (f); |
3408 | /* Non-null means we are in overwrite mode. */ | |
3409 | int overwrite_p = !NILP (current_buffer->overwrite_mode); | |
3410 | int added_width; | |
3411 | struct text_pos pos; | |
3412 | int delta, delta_bytes; | |
3413 | ||
3414 | /* Not done directly. */ | |
3415 | redisplay_performed_directly_p = 0; | |
3416 | ||
3417 | /* Quickly give up for some common cases. */ | |
3418 | if (cursor_in_echo_area | |
3419 | /* Give up if fonts have changed. */ | |
3420 | || fonts_changed_p | |
3421 | /* Give up if face attributes have been changed. */ | |
3422 | || face_change_count | |
3423 | /* Give up if cursor position not really known. */ | |
3424 | || !display_completed | |
3425 | /* Give up if buffer appears in two places. */ | |
3426 | || buffer_shared > 1 | |
c74e645b GM |
3427 | /* Give up if currently displaying a message instead of the |
3428 | minibuffer contents. */ | |
3429 | || (EQ (selected_window, minibuf_window) | |
3430 | && EQ (minibuf_window, echo_area_window)) | |
5f5c8ee5 GM |
3431 | /* Give up for hscrolled mini-buffer because display of the prompt |
3432 | is handled specially there (see display_line). */ | |
3433 | || (MINI_WINDOW_P (w) && XFASTINT (w->hscroll)) | |
3434 | /* Give up if overwriting in the middle of a line. */ | |
177c0ea7 JB |
3435 | || (overwrite_p |
3436 | && PT != ZV | |
5f5c8ee5 GM |
3437 | && FETCH_BYTE (PT) != '\n') |
3438 | /* Give up for tabs and line ends. */ | |
3439 | || g == '\t' | |
3440 | || g == '\n' | |
3441 | || g == '\r' | |
3442 | /* Give up if unable to display the cursor in the window. */ | |
3443 | || w->cursor.vpos < 0 | |
c224f70b GM |
3444 | /* Give up if we are showing a message or just cleared the message |
3445 | because we might need to resize the echo area window. */ | |
3446 | || !NILP (echo_area_buffer[0]) | |
3447 | || !NILP (echo_area_buffer[1]) | |
408f5064 GM |
3448 | || (glyph_row = MATRIX_ROW (w->current_matrix, w->cursor.vpos), |
3449 | /* Can't do it in a continued line because continuation | |
3450 | lines would change. */ | |
3451 | (glyph_row->continued_p | |
3452 | /* Can't use this method if the line overlaps others or is | |
3453 | overlapped by others because these other lines would | |
3454 | have to be redisplayed. */ | |
3455 | || glyph_row->overlapping_p | |
3456 | || glyph_row->overlapped_p)) | |
5f5c8ee5 GM |
3457 | /* Can't do it for partial width windows on terminal frames |
3458 | because we can't clear to eol in such a window. */ | |
3459 | || (!window_redisplay_p && !WINDOW_FULL_WIDTH_P (w))) | |
3460 | return 0; | |
3461 | ||
f3ffc2c3 GM |
3462 | /* If we can't insert glyphs, we can use this method only |
3463 | at the end of a line. */ | |
28d440ab | 3464 | if (!TTY_CHAR_INS_DEL_OK (CURTTY ())) |
f3ffc2c3 GM |
3465 | if (PT != ZV && FETCH_BYTE (PT_BYTE) != '\n') |
3466 | return 0; | |
3467 | ||
5f5c8ee5 GM |
3468 | /* Set up a display iterator structure for W. Glyphs will be |
3469 | produced in scratch_glyph_row. Current position is W's cursor | |
3470 | position. */ | |
3471 | clear_glyph_row (&scratch_glyph_row); | |
3472 | SET_TEXT_POS (pos, PT, PT_BYTE); | |
5f15d712 | 3473 | DEC_TEXT_POS (pos, !NILP (current_buffer->enable_multibyte_characters)); |
5f5c8ee5 GM |
3474 | init_iterator (&it, w, CHARPOS (pos), BYTEPOS (pos), &scratch_glyph_row, |
3475 | DEFAULT_FACE_ID); | |
3476 | ||
3477 | glyph_row = MATRIX_ROW (w->current_matrix, w->cursor.vpos); | |
e876ff42 GM |
3478 | if (glyph_row->mouse_face_p) |
3479 | return 0; | |
177c0ea7 | 3480 | |
5f5c8ee5 GM |
3481 | /* Give up if highlighting trailing whitespace and we have trailing |
3482 | whitespace in glyph_row. We would have to remove the trailing | |
3483 | whitespace face in that case. */ | |
f1f13490 | 3484 | if (!NILP (Vshow_trailing_whitespace) |
5f5c8ee5 GM |
3485 | && glyph_row->used[TEXT_AREA]) |
3486 | { | |
3487 | struct glyph *last; | |
3488 | ||
3489 | last = glyph_row->glyphs[TEXT_AREA] + glyph_row->used[TEXT_AREA] - 1; | |
3490 | if (last->type == STRETCH_GLYPH | |
3491 | || (last->type == CHAR_GLYPH | |
42186983 | 3492 | && last->u.ch == ' ')) |
5f5c8ee5 GM |
3493 | return 0; |
3494 | } | |
3495 | ||
3496 | /* Give up if there are overlay strings at pos. This would fail | |
3497 | if the overlay string has newlines in it. */ | |
3498 | if (STRINGP (it.string)) | |
3499 | return 0; | |
177c0ea7 | 3500 | |
5f5c8ee5 GM |
3501 | it.hpos = w->cursor.hpos; |
3502 | it.vpos = w->cursor.vpos; | |
3503 | it.current_x = w->cursor.x + it.first_visible_x; | |
3504 | it.current_y = w->cursor.y; | |
3505 | it.end_charpos = PT; | |
3506 | it.stop_charpos = min (PT, it.stop_charpos); | |
ae76d741 | 3507 | it.stop_charpos = max (IT_CHARPOS (it), it.stop_charpos); |
5f5c8ee5 GM |
3508 | |
3509 | /* More than one display element may be returned for PT - 1 if | |
3510 | (i) it's a control character which is translated into `\003' or | |
177c0ea7 | 3511 | `^C', or (ii) it has a display table entry, or (iii) it's a |
5f5c8ee5 GM |
3512 | combination of both. */ |
3513 | delta = delta_bytes = 0; | |
3514 | while (get_next_display_element (&it)) | |
3515 | { | |
3516 | PRODUCE_GLYPHS (&it); | |
3517 | ||
3518 | /* Give up if glyph doesn't fit completely on the line. */ | |
3519 | if (it.current_x >= it.last_visible_x) | |
3520 | return 0; | |
3521 | ||
3522 | /* Give up if new glyph has different ascent or descent than | |
3523 | the original row, or if it is not a character glyph. */ | |
3524 | if (glyph_row->ascent != it.ascent | |
3525 | || glyph_row->height != it.ascent + it.descent | |
408f5064 GM |
3526 | || glyph_row->phys_ascent != it.phys_ascent |
3527 | || glyph_row->phys_height != it.phys_ascent + it.phys_descent | |
5f5c8ee5 GM |
3528 | || it.what != IT_CHARACTER) |
3529 | return 0; | |
3530 | ||
3531 | delta += 1; | |
3532 | delta_bytes += it.len; | |
a2e2a7f6 | 3533 | set_iterator_to_next (&it, 1); |
5f5c8ee5 GM |
3534 | } |
3535 | ||
3536 | /* Give up if we hit the right edge of the window. We would have | |
3537 | to insert truncation or continuation glyphs. */ | |
3538 | added_width = it.current_x - (w->cursor.x + it.first_visible_x); | |
3539 | if (glyph_row->pixel_width + added_width >= it.last_visible_x) | |
3540 | return 0; | |
3541 | ||
3542 | /* Give up if there is a \t following in the line. */ | |
3543 | it2 = it; | |
3544 | it2.end_charpos = ZV; | |
3545 | it2.stop_charpos = min (it2.stop_charpos, ZV); | |
3546 | while (get_next_display_element (&it2) | |
3547 | && !ITERATOR_AT_END_OF_LINE_P (&it2)) | |
3548 | { | |
3549 | if (it2.c == '\t') | |
3550 | return 0; | |
a2e2a7f6 | 3551 | set_iterator_to_next (&it2, 1); |
5f5c8ee5 GM |
3552 | } |
3553 | ||
3554 | /* Number of new glyphs produced. */ | |
3555 | n = it.glyph_row->used[TEXT_AREA]; | |
3556 | ||
3557 | /* Start and end of glyphs in original row. */ | |
3558 | glyphs = glyph_row->glyphs[TEXT_AREA] + w->cursor.hpos; | |
3559 | end = glyph_row->glyphs[1 + TEXT_AREA]; | |
60a8948a | 3560 | |
5f5c8ee5 GM |
3561 | /* Make room for new glyphs, then insert them. */ |
3562 | xassert (end - glyphs - n >= 0); | |
700fb05a GM |
3563 | safe_bcopy ((char *) glyphs, (char *) (glyphs + n), |
3564 | (end - glyphs - n) * sizeof (*end)); | |
5f5c8ee5 GM |
3565 | bcopy (it.glyph_row->glyphs[TEXT_AREA], glyphs, n * sizeof *glyphs); |
3566 | glyph_row->used[TEXT_AREA] = min (glyph_row->used[TEXT_AREA] + n, | |
3567 | end - glyph_row->glyphs[TEXT_AREA]); | |
177c0ea7 | 3568 | |
5f5c8ee5 GM |
3569 | /* Compute new line width. */ |
3570 | glyph = glyph_row->glyphs[TEXT_AREA]; | |
3571 | end = glyph + glyph_row->used[TEXT_AREA]; | |
3572 | glyph_row->pixel_width = glyph_row->x; | |
3573 | while (glyph < end) | |
3574 | { | |
3575 | glyph_row->pixel_width += glyph->pixel_width; | |
3576 | ++glyph; | |
3577 | } | |
3578 | ||
177c0ea7 | 3579 | /* Increment buffer positions for glyphs following the newly |
5f5c8ee5 GM |
3580 | inserted ones. */ |
3581 | for (glyph = glyphs + n; glyph < end; ++glyph) | |
f2fa858f | 3582 | if (glyph->charpos > 0 && BUFFERP (glyph->object)) |
5f5c8ee5 | 3583 | glyph->charpos += delta; |
177c0ea7 | 3584 | |
5f5c8ee5 GM |
3585 | if (MATRIX_ROW_END_CHARPOS (glyph_row) > 0) |
3586 | { | |
3587 | MATRIX_ROW_END_CHARPOS (glyph_row) += delta; | |
3588 | MATRIX_ROW_END_BYTEPOS (glyph_row) += delta_bytes; | |
3589 | } | |
177c0ea7 | 3590 | |
5f5c8ee5 | 3591 | /* Adjust positions in lines following the one we are in. */ |
86c11ba1 GM |
3592 | increment_matrix_positions (w->current_matrix, |
3593 | w->cursor.vpos + 1, | |
3594 | w->current_matrix->nrows, | |
3595 | delta, delta_bytes); | |
5f5c8ee5 GM |
3596 | |
3597 | glyph_row->contains_overlapping_glyphs_p | |
3598 | |= it.glyph_row->contains_overlapping_glyphs_p; | |
3599 | ||
975c6226 GM |
3600 | glyph_row->displays_text_p = 1; |
3601 | w->window_end_vpos = make_number (max (w->cursor.vpos, | |
3602 | XFASTINT (w->window_end_vpos))); | |
3603 | ||
f1f13490 | 3604 | if (!NILP (Vshow_trailing_whitespace)) |
5f5c8ee5 GM |
3605 | highlight_trailing_whitespace (it.f, glyph_row); |
3606 | ||
3607 | /* Write glyphs. If at end of row, we can simply call write_glyphs. | |
3608 | In the middle, we have to insert glyphs. Note that this is now | |
3609 | implemented for X frames. The implementation uses updated_window | |
3610 | and updated_row. */ | |
3611 | updated_row = glyph_row; | |
9d126815 | 3612 | updated_area = TEXT_AREA; |
5f5c8ee5 GM |
3613 | update_begin (f); |
3614 | if (rif) | |
3615 | { | |
3616 | rif->update_window_begin_hook (w); | |
177c0ea7 | 3617 | |
7728f17b GM |
3618 | if (glyphs == end - n |
3619 | /* In front of a space added by append_space. */ | |
3620 | || (glyphs == end - n - 1 | |
3621 | && (end - n)->charpos <= 0)) | |
5f5c8ee5 GM |
3622 | rif->write_glyphs (glyphs, n); |
3623 | else | |
3624 | rif->insert_glyphs (glyphs, n); | |
3625 | } | |
3626 | else | |
3627 | { | |
3628 | if (glyphs == end - n) | |
3629 | write_glyphs (glyphs, n); | |
3630 | else | |
3631 | insert_glyphs (glyphs, n); | |
3632 | } | |
4588ec20 | 3633 | |
5f5c8ee5 GM |
3634 | w->cursor.hpos += n; |
3635 | w->cursor.x = it.current_x - it.first_visible_x; | |
3636 | xassert (w->cursor.hpos >= 0 | |
3637 | && w->cursor.hpos < w->desired_matrix->matrix_w); | |
3638 | ||
3639 | /* How to set the cursor differs depending on whether we are | |
3640 | using a frame matrix or a window matrix. Note that when | |
3641 | a frame matrix is used, cursor_to expects frame coordinates, | |
3642 | and the X and Y parameters are not used. */ | |
3643 | if (window_redisplay_p) | |
3644 | rif->cursor_to (w->cursor.vpos, w->cursor.hpos, | |
3645 | w->cursor.y, w->cursor.x); | |
3646 | else | |
3647 | { | |
3648 | int x, y; | |
3649 | x = (WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos) | |
7df02016 KS |
3650 | + (INTEGERP (w->left_margin_cols) |
3651 | ? XFASTINT (w->left_margin_cols) | |
5f5c8ee5 GM |
3652 | : 0)); |
3653 | y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
3654 | cursor_to (y, x); | |
3655 | } | |
4588ec20 | 3656 | |
5f5c8ee5 | 3657 | if (rif) |
e876ff42 | 3658 | rif->update_window_end_hook (w, 1, 0); |
5f5c8ee5 GM |
3659 | update_end (f); |
3660 | updated_row = NULL; | |
3661 | fflush (stdout); | |
4588ec20 | 3662 | |
5f5c8ee5 | 3663 | TRACE ((stderr, "direct output for insert\n")); |
fc5206ff | 3664 | mark_window_display_accurate (it.window, 1); |
5f5c8ee5 GM |
3665 | redisplay_performed_directly_p = 1; |
3666 | return 1; | |
3667 | } | |
448fd7c0 | 3668 | |
4588ec20 | 3669 | |
5f5c8ee5 GM |
3670 | /* Perform a direct display update for moving PT by N positions |
3671 | left or right. N < 0 means a movement backwards. This function | |
3672 | is currently only called for N == 1 or N == -1. */ | |
3673 | ||
3674 | int | |
3675 | direct_output_forward_char (n) | |
3676 | int n; | |
3677 | { | |
91fb7e1b | 3678 | struct frame *f = SELECTED_FRAME (); |
5f5c8ee5 GM |
3679 | struct window *w = XWINDOW (selected_window); |
3680 | struct glyph_row *row; | |
3681 | ||
959804a0 | 3682 | /* Give up if point moved out of or into a composition. */ |
7c752c80 | 3683 | if (check_point_in_composition (current_buffer, XINT (w->last_point), |
959804a0 KH |
3684 | current_buffer, PT)) |
3685 | return 0; | |
3686 | ||
5f5c8ee5 GM |
3687 | /* Give up if face attributes have been changed. */ |
3688 | if (face_change_count) | |
3689 | return 0; | |
177c0ea7 JB |
3690 | |
3691 | /* Give up if current matrix is not up to date or we are | |
5f5c8ee5 GM |
3692 | displaying a message. */ |
3693 | if (!display_completed || cursor_in_echo_area) | |
3694 | return 0; | |
3695 | ||
3696 | /* Give up if the buffer's direction is reversed. */ | |
3697 | if (!NILP (XBUFFER (w->buffer)->direction_reversed)) | |
3698 | return 0; | |
3699 | ||
3700 | /* Can't use direct output if highlighting a region. */ | |
3701 | if (!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active)) | |
3702 | return 0; | |
3703 | ||
f1f13490 GM |
3704 | /* Can't use direct output if highlighting trailing whitespace. */ |
3705 | if (!NILP (Vshow_trailing_whitespace)) | |
3706 | return 0; | |
3707 | ||
d2d2ddaf GM |
3708 | /* Give up if we are showing a message or just cleared the message |
3709 | because we might need to resize the echo area window. */ | |
3710 | if (!NILP (echo_area_buffer[0]) || !NILP (echo_area_buffer[1])) | |
3711 | return 0; | |
3712 | ||
e4e0bee9 GM |
3713 | /* Give up if currently displaying a message instead of the |
3714 | minibuffer contents. */ | |
3715 | if (XWINDOW (minibuf_window) == w | |
3716 | && EQ (minibuf_window, echo_area_window)) | |
3717 | return 0; | |
177c0ea7 | 3718 | |
d2d2ddaf GM |
3719 | /* Give up if we don't know where the cursor is. */ |
3720 | if (w->cursor.vpos < 0) | |
3721 | return 0; | |
3722 | ||
5f5c8ee5 GM |
3723 | row = MATRIX_ROW (w->current_matrix, w->cursor.vpos); |
3724 | ||
2a8bd25f | 3725 | /* Give up if PT is outside of the last known cursor row. */ |
9b784ab8 GM |
3726 | if (PT <= MATRIX_ROW_START_CHARPOS (row) |
3727 | || PT >= MATRIX_ROW_END_CHARPOS (row)) | |
5f5c8ee5 GM |
3728 | return 0; |
3729 | ||
3730 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
177c0ea7 | 3731 | |
5f5c8ee5 GM |
3732 | w->last_cursor = w->cursor; |
3733 | XSETFASTINT (w->last_point, PT); | |
3734 | ||
3735 | xassert (w->cursor.hpos >= 0 | |
3736 | && w->cursor.hpos < w->desired_matrix->matrix_w); | |
177c0ea7 | 3737 | |
5f5c8ee5 GM |
3738 | if (FRAME_WINDOW_P (f)) |
3739 | rif->cursor_to (w->cursor.vpos, w->cursor.hpos, | |
3740 | w->cursor.y, w->cursor.x); | |
3741 | else | |
3742 | { | |
3743 | int x, y; | |
3744 | x = (WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos) | |
7df02016 KS |
3745 | + (INTEGERP (w->left_margin_cols) |
3746 | ? XFASTINT (w->left_margin_cols) | |
5f5c8ee5 GM |
3747 | : 0)); |
3748 | y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
3749 | cursor_to (y, x); | |
4588ec20 | 3750 | } |
177c0ea7 | 3751 | |
5f5c8ee5 GM |
3752 | fflush (stdout); |
3753 | redisplay_performed_directly_p = 1; | |
4588ec20 JB |
3754 | return 1; |
3755 | } | |
5f5c8ee5 GM |
3756 | |
3757 | ||
4588ec20 | 3758 | \f |
5f5c8ee5 GM |
3759 | /*********************************************************************** |
3760 | Frame Update | |
3761 | ***********************************************************************/ | |
4588ec20 | 3762 | |
5f5c8ee5 | 3763 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 3764 | |
5f5c8ee5 GM |
3765 | If FORCE_P is non-zero, don't let redisplay be stopped by detecting |
3766 | pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try | |
3767 | scrolling. | |
177c0ea7 | 3768 | |
5f5c8ee5 | 3769 | Value is non-zero if redisplay was stopped due to pending input. */ |
4588ec20 | 3770 | |
5f5c8ee5 GM |
3771 | int |
3772 | update_frame (f, force_p, inhibit_hairy_id_p) | |
3773 | struct frame *f; | |
3774 | int force_p; | |
3775 | int inhibit_hairy_id_p; | |
3776 | { | |
3777 | /* 1 means display has been paused because of pending input. */ | |
3778 | int paused_p; | |
3779 | struct window *root_window = XWINDOW (f->root_window); | |
3780 | ||
3781 | if (FRAME_WINDOW_P (f)) | |
4588ec20 | 3782 | { |
5f5c8ee5 GM |
3783 | /* We are working on window matrix basis. All windows whose |
3784 | flag must_be_updated_p is set have to be updated. */ | |
3785 | ||
3786 | /* Record that we are not working on frame matrices. */ | |
3787 | set_frame_matrix_frame (NULL); | |
3788 | ||
3789 | /* Update all windows in the window tree of F, maybe stopping | |
3790 | when pending input is detected. */ | |
3791 | update_begin (f); | |
3792 | ||
3793 | /* Update the menu bar on X frames that don't have toolkit | |
3794 | support. */ | |
3795 | if (WINDOWP (f->menu_bar_window)) | |
3796 | update_window (XWINDOW (f->menu_bar_window), 1); | |
3797 | ||
3798 | /* Update the tool-bar window, if present. */ | |
9ea173e8 | 3799 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3800 | { |
9ea173e8 | 3801 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3802 | |
3803 | /* Update tool-bar window. */ | |
3804 | if (w->must_be_updated_p) | |
4588ec20 | 3805 | { |
153a073c PJ |
3806 | Lisp_Object tem; |
3807 | ||
5f5c8ee5 GM |
3808 | update_window (w, 1); |
3809 | w->must_be_updated_p = 0; | |
3810 | ||
3811 | /* Swap tool-bar strings. We swap because we want to | |
3812 | reuse strings. */ | |
9ea173e8 GM |
3813 | tem = f->current_tool_bar_string; |
3814 | f->current_tool_bar_string = f->desired_tool_bar_string; | |
3815 | f->desired_tool_bar_string = tem; | |
4588ec20 JB |
3816 | } |
3817 | } | |
177c0ea7 | 3818 | |
5f5c8ee5 GM |
3819 | |
3820 | /* Update windows. */ | |
3821 | paused_p = update_window_tree (root_window, force_p); | |
3822 | update_end (f); | |
177c0ea7 | 3823 | |
868dd24b GM |
3824 | #if 0 /* This flush is a performance bottleneck under X, |
3825 | and it doesn't seem to be necessary anyway. */ | |
5f5c8ee5 GM |
3826 | rif->flush_display (f); |
3827 | #endif | |
4588ec20 | 3828 | } |
5f5c8ee5 GM |
3829 | else |
3830 | { | |
3831 | /* We are working on frame matrix basis. Set the frame on whose | |
3832 | frame matrix we operate. */ | |
3833 | set_frame_matrix_frame (f); | |
3834 | ||
868dd24b | 3835 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3836 | build_frame_matrix (f); |
177c0ea7 | 3837 | |
868dd24b GM |
3838 | /* Update the display */ |
3839 | update_begin (f); | |
5f5c8ee5 | 3840 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3841 | update_end (f); |
3842 | ||
28d440ab KL |
3843 | if (TTY_TERMSCRIPT (FRAME_TTY (f))) |
3844 | fflush (TTY_TERMSCRIPT (FRAME_TTY (f))); | |
3845 | fflush (TTY_OUTPUT (FRAME_TTY (f))); | |
868dd24b | 3846 | |
5f5c8ee5 | 3847 | /* Check window matrices for lost pointers. */ |
2d5912c1 | 3848 | #if GLYPH_DEBUG |
9b0e97aa GM |
3849 | check_window_matrix_pointers (root_window); |
3850 | add_frame_display_history (f, paused_p); | |
3851 | #endif | |
5f5c8ee5 GM |
3852 | } |
3853 | ||
3854 | /* Reset flags indicating that a window should be updated. */ | |
3855 | set_window_update_flags (root_window, 0); | |
177c0ea7 | 3856 | |
868dd24b | 3857 | display_completed = !paused_p; |
5f5c8ee5 | 3858 | return paused_p; |
4588ec20 | 3859 | } |
5f5c8ee5 GM |
3860 | |
3861 | ||
4588ec20 | 3862 | \f |
5f5c8ee5 GM |
3863 | /************************************************************************ |
3864 | Window-based updates | |
3865 | ************************************************************************/ | |
3866 | ||
3867 | /* Perform updates in window tree rooted at W. FORCE_P non-zero means | |
3868 | don't stop updating when input is pending. */ | |
3869 | ||
3870 | static int | |
3871 | update_window_tree (w, force_p) | |
3872 | struct window *w; | |
3873 | int force_p; | |
3874 | { | |
3875 | int paused_p = 0; | |
177c0ea7 | 3876 | |
5f5c8ee5 GM |
3877 | while (w && !paused_p) |
3878 | { | |
3879 | if (!NILP (w->hchild)) | |
3880 | paused_p |= update_window_tree (XWINDOW (w->hchild), force_p); | |
3881 | else if (!NILP (w->vchild)) | |
3882 | paused_p |= update_window_tree (XWINDOW (w->vchild), force_p); | |
3883 | else if (w->must_be_updated_p) | |
3884 | paused_p |= update_window (w, force_p); | |
3885 | ||
3886 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3887 | } | |
3888 | ||
3889 | return paused_p; | |
3890 | } | |
3891 | ||
3892 | ||
3893 | /* Update window W if its flag must_be_updated_p is non-zero. If | |
3894 | FORCE_P is non-zero, don't stop updating if input is pending. */ | |
3895 | ||
3896 | void | |
3897 | update_single_window (w, force_p) | |
3898 | struct window *w; | |
3899 | int force_p; | |
3900 | { | |
3901 | if (w->must_be_updated_p) | |
3902 | { | |
3903 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
3904 | ||
3905 | /* Record that this is not a frame-based redisplay. */ | |
3906 | set_frame_matrix_frame (NULL); | |
3907 | ||
3908 | /* Update W. */ | |
3909 | update_begin (f); | |
3910 | update_window (w, force_p); | |
3911 | update_end (f); | |
4588ec20 | 3912 | |
5f5c8ee5 GM |
3913 | /* Reset flag in W. */ |
3914 | w->must_be_updated_p = 0; | |
3915 | } | |
3916 | } | |
4588ec20 | 3917 | |
4588ec20 | 3918 | |
408f5064 GM |
3919 | /* Redraw lines from the current matrix of window W that are |
3920 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
3921 | ||
3922 | static void | |
3923 | redraw_overlapped_rows (w, yb) | |
3924 | struct window *w; | |
3925 | int yb; | |
3926 | { | |
d8ee7803 | 3927 | int i; |
177c0ea7 | 3928 | |
408f5064 GM |
3929 | /* If rows overlapping others have been changed, the rows being |
3930 | overlapped have to be redrawn. This won't draw lines that have | |
3931 | already been drawn in update_window_line because overlapped_p in | |
3932 | desired rows is 0, so after row assignment overlapped_p in | |
3933 | current rows is 0. */ | |
3934 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
3935 | { | |
e876ff42 | 3936 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
3937 | |
3938 | if (!row->enabled_p) | |
3939 | break; | |
3940 | else if (row->mode_line_p) | |
3941 | continue; | |
177c0ea7 | 3942 | |
408f5064 GM |
3943 | if (row->overlapped_p) |
3944 | { | |
3945 | enum glyph_row_area area; | |
177c0ea7 | 3946 | |
408f5064 GM |
3947 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
3948 | { | |
3949 | updated_row = row; | |
3950 | updated_area = area; | |
3951 | rif->cursor_to (i, 0, row->y, area == TEXT_AREA ? row->x : 0); | |
3952 | if (row->used[area]) | |
3953 | rif->write_glyphs (row->glyphs[area], row->used[area]); | |
3954 | rif->clear_end_of_line (-1); | |
3955 | } | |
177c0ea7 | 3956 | |
408f5064 GM |
3957 | row->overlapped_p = 0; |
3958 | } | |
3959 | ||
e876ff42 | 3960 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
3961 | break; |
3962 | } | |
3963 | } | |
3964 | ||
3965 | ||
3966 | /* Redraw lines from the current matrix of window W that overlap | |
3967 | others. YB is bottom-most y-position in W. */ | |
3968 | ||
3969 | static void | |
3970 | redraw_overlapping_rows (w, yb) | |
3971 | struct window *w; | |
3972 | int yb; | |
3973 | { | |
3974 | int i, bottom_y; | |
3975 | struct glyph_row *row; | |
177c0ea7 | 3976 | |
408f5064 GM |
3977 | for (i = 0; i < w->current_matrix->nrows; ++i) |
3978 | { | |
3979 | row = w->current_matrix->rows + i; | |
3980 | ||
3981 | if (!row->enabled_p) | |
3982 | break; | |
3983 | else if (row->mode_line_p) | |
3984 | continue; | |
177c0ea7 | 3985 | |
408f5064 GM |
3986 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
3987 | ||
3988 | if (row->overlapping_p && i > 0 && bottom_y < yb) | |
3989 | { | |
3990 | if (row->used[LEFT_MARGIN_AREA]) | |
3991 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA); | |
177c0ea7 | 3992 | |
408f5064 GM |
3993 | if (row->used[TEXT_AREA]) |
3994 | rif->fix_overlapping_area (w, row, TEXT_AREA); | |
177c0ea7 | 3995 | |
408f5064 GM |
3996 | if (row->used[RIGHT_MARGIN_AREA]) |
3997 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA); | |
3998 | ||
153a073c | 3999 | /* Record in neighbour rows that ROW overwrites part of their |
408f5064 GM |
4000 | display. */ |
4001 | if (row->phys_ascent > row->ascent && i > 0) | |
4002 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
4003 | if ((row->phys_height - row->phys_ascent | |
4004 | > row->height - row->ascent) | |
4005 | && bottom_y < yb) | |
4006 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
4007 | } | |
4008 | ||
4009 | if (bottom_y >= yb) | |
4010 | break; | |
4011 | } | |
4012 | } | |
4013 | ||
4014 | ||
93962bfa GM |
4015 | #ifdef GLYPH_DEBUG |
4016 | ||
4017 | /* Check that no row in the current matrix of window W is enabled | |
4018 | which is below what's displayed in the window. */ | |
4019 | ||
4020 | void | |
4021 | check_current_matrix_flags (w) | |
4022 | struct window *w; | |
4023 | { | |
4024 | int last_seen_p = 0; | |
4025 | int i, yb = window_text_bottom_y (w); | |
4026 | ||
4027 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
4028 | { | |
4029 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
4030 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
4031 | last_seen_p = 1; | |
4032 | else if (last_seen_p && row->enabled_p) | |
4033 | abort (); | |
4034 | } | |
4035 | } | |
4036 | ||
4037 | #endif /* GLYPH_DEBUG */ | |
4038 | ||
4039 | ||
5f5c8ee5 GM |
4040 | /* Update display of window W. FORCE_P non-zero means that we should |
4041 | not stop when detecting pending input. */ | |
4042 | ||
4043 | static int | |
4044 | update_window (w, force_p) | |
4588ec20 | 4045 | struct window *w; |
5f5c8ee5 | 4046 | int force_p; |
4588ec20 | 4047 | { |
5f5c8ee5 GM |
4048 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4049 | int paused_p; | |
4050 | int preempt_count = baud_rate / 2400 + 1; | |
4051 | extern int input_pending; | |
8fd9a666 | 4052 | extern Lisp_Object do_mouse_tracking; |
b96fd3e8 GM |
4053 | #if GLYPH_DEBUG |
4054 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
b96fd3e8 | 4055 | #endif |
5f5c8ee5 GM |
4056 | |
4057 | /* Check that W's frame doesn't have glyph matrices. */ | |
4058 | xassert (FRAME_WINDOW_P (f)); | |
4059 | xassert (updating_frame != NULL); | |
4060 | ||
4061 | /* Check pending input the first time so that we can quickly return. */ | |
4062 | if (redisplay_dont_pause) | |
4063 | force_p = 1; | |
4064 | else | |
4065 | detect_input_pending (); | |
4588ec20 | 4066 | |
5f5c8ee5 GM |
4067 | /* If forced to complete the update, or if no input is pending, do |
4068 | the update. */ | |
8fd9a666 | 4069 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 4070 | { |
5f5c8ee5 GM |
4071 | struct glyph_row *row, *end; |
4072 | struct glyph_row *mode_line_row; | |
56974e03 | 4073 | struct glyph_row *header_line_row; |
e87b8809 | 4074 | int yb, changed_p = 0, mouse_face_overwritten_p = 0, n_updated; |
5f5c8ee5 GM |
4075 | |
4076 | rif->update_window_begin_hook (w); | |
4077 | yb = window_text_bottom_y (w); | |
4078 | ||
153a073c PJ |
4079 | /* If window has a header line, update it before everything else. |
4080 | Adjust y-positions of other rows by the header line height. */ | |
5f5c8ee5 GM |
4081 | row = desired_matrix->rows; |
4082 | end = row + desired_matrix->nrows - 1; | |
177c0ea7 | 4083 | |
5f5c8ee5 | 4084 | if (row->mode_line_p) |
56974e03 GM |
4085 | { |
4086 | header_line_row = row; | |
4087 | ++row; | |
4088 | } | |
4089 | else | |
4090 | header_line_row = NULL; | |
5f5c8ee5 GM |
4091 | |
4092 | /* Update the mode line, if necessary. */ | |
4093 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
4094 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
4095 | { | |
4096 | mode_line_row->y = yb; | |
4097 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
4098 | desired_matrix), |
4099 | &mouse_face_overwritten_p); | |
408f5064 | 4100 | changed_p = 1; |
5f5c8ee5 GM |
4101 | } |
4102 | ||
4103 | /* Find first enabled row. Optimizations in redisplay_internal | |
4104 | may lead to an update with only one row enabled. There may | |
4105 | be also completely empty matrices. */ | |
4106 | while (row < end && !row->enabled_p) | |
4107 | ++row; | |
177c0ea7 | 4108 | |
bfdcafe1 | 4109 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 4110 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
4111 | { |
4112 | int rc = scrolling_window (w, header_line_row != NULL); | |
4113 | if (rc < 0) | |
4114 | { | |
4115 | /* All rows were found to be equal. */ | |
4116 | paused_p = 0; | |
4117 | goto set_cursor; | |
4118 | } | |
4119 | else if (rc > 0) | |
4120 | /* We've scrolled the display. */ | |
4121 | force_p = 1; | |
4122 | changed_p = 1; | |
4123 | } | |
5f5c8ee5 | 4124 | |
153a073c | 4125 | /* Update the header line after scrolling because a new header |
5f5c8ee5 GM |
4126 | line would otherwise overwrite lines at the top of the window |
4127 | that can be scrolled. */ | |
045dee35 | 4128 | if (header_line_row && header_line_row->enabled_p) |
5f5c8ee5 | 4129 | { |
045dee35 | 4130 | header_line_row->y = 0; |
e876ff42 | 4131 | update_window_line (w, 0, &mouse_face_overwritten_p); |
408f5064 | 4132 | changed_p = 1; |
5f5c8ee5 GM |
4133 | } |
4134 | ||
4135 | /* Update the rest of the lines. */ | |
e87b8809 | 4136 | for (n_updated = 0; row < end && (force_p || !input_pending); ++row) |
b7412313 | 4137 | if (row->enabled_p) |
5f5c8ee5 GM |
4138 | { |
4139 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
4140 | int i; | |
177c0ea7 | 4141 | |
153a073c | 4142 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
4143 | detect_input_pending. If it's done too often, |
4144 | scrolling large windows with repeated scroll-up | |
4145 | commands will too quickly pause redisplay. */ | |
e87b8809 | 4146 | if (!force_p && ++n_updated % preempt_count == 0) |
5f5c8ee5 GM |
4147 | detect_input_pending (); |
4148 | ||
e876ff42 GM |
4149 | changed_p |= update_window_line (w, vpos, |
4150 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
4151 | |
4152 | /* Mark all rows below the last visible one in the current | |
4153 | matrix as invalid. This is necessary because of | |
4154 | variable line heights. Consider the case of three | |
4155 | successive redisplays, where the first displays 5 | |
4156 | lines, the second 3 lines, and the third 5 lines again. | |
4157 | If the second redisplay wouldn't mark rows in the | |
4158 | current matrix invalid, the third redisplay might be | |
4159 | tempted to optimize redisplay based on lines displayed | |
4160 | in the first redisplay. */ | |
4161 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
4162 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
4163 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
4164 | } | |
4165 | ||
4166 | /* Was display preempted? */ | |
4167 | paused_p = row < end; | |
177c0ea7 | 4168 | |
56974e03 | 4169 | set_cursor: |
177c0ea7 | 4170 | |
153a073c | 4171 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
4172 | if (!paused_p && !w->pseudo_window_p) |
4173 | { | |
e876ff42 GM |
4174 | if (changed_p && rif->fix_overlapping_area) |
4175 | { | |
4176 | redraw_overlapped_rows (w, yb); | |
4177 | redraw_overlapping_rows (w, yb); | |
4178 | } | |
177c0ea7 | 4179 | |
5f5c8ee5 GM |
4180 | /* Make cursor visible at cursor position of W. */ |
4181 | set_window_cursor_after_update (w); | |
4182 | ||
e876ff42 GM |
4183 | #if 0 /* Check that current matrix invariants are satisfied. This is |
4184 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
4185 | IF_DEBUG (check_matrix_invariants (w)); |
4186 | #endif | |
4588ec20 | 4187 | } |
5f5c8ee5 GM |
4188 | |
4189 | #if GLYPH_DEBUG | |
4190 | /* Remember the redisplay method used to display the matrix. */ | |
4191 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
4192 | #endif | |
408f5064 | 4193 | |
56974e03 GM |
4194 | /* End the update of window W. Don't set the cursor if we |
4195 | paused updating the display because in this case, | |
4196 | set_window_cursor_after_update hasn't been called, and | |
4197 | output_cursor doesn't contain the cursor location. */ | |
4198 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); | |
4588ec20 | 4199 | } |
5f5c8ee5 GM |
4200 | else |
4201 | paused_p = 1; | |
4202 | ||
2d5912c1 | 4203 | #if GLYPH_DEBUG |
0cffd9d8 | 4204 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
4205 | add_window_display_history (w, w->current_matrix->method, paused_p); |
4206 | #endif | |
177c0ea7 | 4207 | |
5f5c8ee5 | 4208 | clear_glyph_matrix (desired_matrix); |
408f5064 | 4209 | |
5f5c8ee5 | 4210 | return paused_p; |
4588ec20 JB |
4211 | } |
4212 | ||
b64b3980 | 4213 | |
5f5c8ee5 GM |
4214 | /* Update the display of area AREA in window W, row number VPOS. |
4215 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
4216 | ||
4217 | static void | |
4218 | update_marginal_area (w, area, vpos) | |
b64b3980 | 4219 | struct window *w; |
5f5c8ee5 | 4220 | int area, vpos; |
b64b3980 | 4221 | { |
5f5c8ee5 GM |
4222 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
4223 | ||
4224 | /* Let functions in xterm.c know what area subsequent X positions | |
4225 | will be relative to. */ | |
4226 | updated_area = area; | |
4227 | ||
4228 | /* Set cursor to start of glyphs, write them, and clear to the end | |
4229 | of the area. I don't think that something more sophisticated is | |
4230 | necessary here, since marginal areas will not be the default. */ | |
4231 | rif->cursor_to (vpos, 0, desired_row->y, 0); | |
4232 | if (desired_row->used[area]) | |
4233 | rif->write_glyphs (desired_row->glyphs[area], desired_row->used[area]); | |
4234 | rif->clear_end_of_line (-1); | |
b64b3980 | 4235 | } |
23b0200c | 4236 | |
352f1545 | 4237 | |
408f5064 GM |
4238 | /* Update the display of the text area of row VPOS in window W. |
4239 | Value is non-zero if display has changed. */ | |
5f5c8ee5 | 4240 | |
408f5064 | 4241 | static int |
5f5c8ee5 | 4242 | update_text_area (w, vpos) |
23b0200c | 4243 | struct window *w; |
5f5c8ee5 | 4244 | int vpos; |
23b0200c | 4245 | { |
5f5c8ee5 GM |
4246 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
4247 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
408f5064 | 4248 | int changed_p = 0; |
5f5c8ee5 GM |
4249 | |
4250 | /* Let functions in xterm.c know what area subsequent X positions | |
4251 | will be relative to. */ | |
4252 | updated_area = TEXT_AREA; | |
177c0ea7 | 4253 | |
5f5c8ee5 GM |
4254 | /* If rows are at different X or Y, or rows have different height, |
4255 | or the current row is marked invalid, write the entire line. */ | |
4256 | if (!current_row->enabled_p | |
4257 | || desired_row->y != current_row->y | |
4258 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
4259 | || desired_row->phys_ascent != current_row->phys_ascent |
4260 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 4261 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 4262 | || current_row->overlapped_p |
62ba722a | 4263 | || current_row->mouse_face_p |
5f5c8ee5 GM |
4264 | || current_row->x != desired_row->x) |
4265 | { | |
4266 | rif->cursor_to (vpos, 0, desired_row->y, desired_row->x); | |
177c0ea7 | 4267 | |
5f5c8ee5 GM |
4268 | if (desired_row->used[TEXT_AREA]) |
4269 | rif->write_glyphs (desired_row->glyphs[TEXT_AREA], | |
4270 | desired_row->used[TEXT_AREA]); | |
177c0ea7 | 4271 | |
5f5c8ee5 GM |
4272 | /* Clear to end of window. */ |
4273 | rif->clear_end_of_line (-1); | |
408f5064 | 4274 | changed_p = 1; |
60f2f3f1 GM |
4275 | |
4276 | /* This erases the cursor. We do this here because | |
4277 | notice_overwritten_cursor cannot easily check this, which | |
4278 | might indicate that the whole functionality of | |
4279 | notice_overwritten_cursor would better be implemented here. | |
4280 | On the other hand, we need notice_overwritten_cursor as long | |
4281 | as mouse highlighting is done asynchronously outside of | |
4282 | redisplay. */ | |
4283 | if (vpos == w->phys_cursor.vpos) | |
4284 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
4285 | } |
4286 | else | |
4287 | { | |
4288 | int stop, i, x; | |
4289 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
4290 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
e47306e6 | 4291 | int overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 4292 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
5f5c8ee5 GM |
4293 | |
4294 | /* If the desired row extends its face to the text area end, | |
4295 | make sure we write at least one glyph, so that the face | |
4296 | extension actually takes place. */ | |
4554cc79 | 4297 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) |
074b781a | 4298 | --desired_stop_pos; |
177c0ea7 | 4299 | |
5f5c8ee5 GM |
4300 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
4301 | i = 0; | |
4302 | x = desired_row->x; | |
8399f8a0 GM |
4303 | |
4304 | /* Loop over glyphs that current and desired row may have | |
4305 | in common. */ | |
5f5c8ee5 | 4306 | while (i < stop) |
352f1545 | 4307 | { |
6d950f4c | 4308 | int can_skip_p = 1; |
177c0ea7 | 4309 | |
5f5c8ee5 | 4310 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
4311 | don't have to be written. We can't skip if the last |
4312 | current glyph overlaps the glyph to its right. For | |
4313 | example, consider a current row of `if ' with the `f' in | |
4314 | Courier bold so that it overlaps the ` ' to its right. | |
4315 | If the desired row is ` ', we would skip over the space | |
4316 | after the `if' and there would remain a pixel from the | |
4317 | `f' on the screen. */ | |
4318 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 4319 | { |
e47306e6 GM |
4320 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
4321 | int left, right; | |
177c0ea7 | 4322 | |
e47306e6 GM |
4323 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
4324 | &left, &right); | |
6d950f4c | 4325 | can_skip_p = right == 0; |
352f1545 | 4326 | } |
177c0ea7 | 4327 | |
6d950f4c | 4328 | if (can_skip_p) |
352f1545 | 4329 | { |
6d950f4c GM |
4330 | while (i < stop |
4331 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
4332 | { | |
4333 | x += desired_glyph->pixel_width; | |
4334 | ++desired_glyph, ++current_glyph, ++i; | |
4335 | } | |
4336 | ||
4337 | /* Consider the case that the current row contains "xxx | |
4338 | ppp ggg" in italic Courier font, and the desired row | |
4339 | is "xxx ggg". The character `p' has lbearing, `g' | |
4340 | has not. The loop above will stop in front of the | |
4341 | first `p' in the current row. If we would start | |
4342 | writing glyphs there, we wouldn't erase the lbearing | |
4343 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 4344 | taken care of by draw_glyphs. */ |
6d950f4c GM |
4345 | if (overlapping_glyphs_p |
4346 | && i > 0 | |
4347 | && i < current_row->used[TEXT_AREA] | |
4348 | && (current_row->used[TEXT_AREA] | |
4349 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 4350 | { |
6d950f4c | 4351 | int left, right; |
177c0ea7 | 4352 | |
6d950f4c GM |
4353 | rif->get_glyph_overhangs (current_glyph, XFRAME (w->frame), |
4354 | &left, &right); | |
4355 | while (left > 0 && i > 0) | |
4356 | { | |
4357 | --i, --desired_glyph, --current_glyph; | |
4358 | x -= desired_glyph->pixel_width; | |
4359 | left -= desired_glyph->pixel_width; | |
4360 | } | |
5f5c8ee5 | 4361 | } |
352f1545 | 4362 | } |
177c0ea7 | 4363 | |
5f5c8ee5 GM |
4364 | /* Try to avoid writing the entire rest of the desired row |
4365 | by looking for a resync point. This mainly prevents | |
4366 | mode line flickering in the case the mode line is in | |
4367 | fixed-pitch font, which it usually will be. */ | |
4368 | if (i < desired_row->used[TEXT_AREA]) | |
4369 | { | |
4370 | int start_x = x, start_hpos = i; | |
4371 | struct glyph *start = desired_glyph; | |
4372 | int current_x = x; | |
6d950f4c GM |
4373 | int skip_first_p = !can_skip_p; |
4374 | ||
5f5c8ee5 GM |
4375 | /* Find the next glyph that's equal again. */ |
4376 | while (i < stop | |
6d950f4c GM |
4377 | && (skip_first_p |
4378 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
4379 | && x == current_x) |
4380 | { | |
4381 | x += desired_glyph->pixel_width; | |
4382 | current_x += current_glyph->pixel_width; | |
4383 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 4384 | skip_first_p = 0; |
5f5c8ee5 | 4385 | } |
23b0200c | 4386 | |
5f5c8ee5 GM |
4387 | if (i == start_hpos || x != current_x) |
4388 | { | |
4389 | i = start_hpos; | |
4390 | x = start_x; | |
4391 | desired_glyph = start; | |
4392 | break; | |
4393 | } | |
e47306e6 | 4394 | |
5f5c8ee5 GM |
4395 | rif->cursor_to (vpos, start_hpos, desired_row->y, start_x); |
4396 | rif->write_glyphs (start, i - start_hpos); | |
408f5064 | 4397 | changed_p = 1; |
5f5c8ee5 GM |
4398 | } |
4399 | } | |
177c0ea7 | 4400 | |
5f5c8ee5 GM |
4401 | /* Write the rest. */ |
4402 | if (i < desired_row->used[TEXT_AREA]) | |
4403 | { | |
4404 | rif->cursor_to (vpos, i, desired_row->y, x); | |
4405 | rif->write_glyphs (desired_glyph, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 4406 | changed_p = 1; |
5f5c8ee5 | 4407 | } |
177c0ea7 | 4408 | |
5f5c8ee5 GM |
4409 | /* Maybe clear to end of line. */ |
4410 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
4411 | { | |
4412 | /* If new row extends to the end of the text area, nothing | |
4413 | has to be cleared, if and only if we did a write_glyphs | |
4414 | above. This is made sure by setting desired_stop_pos | |
4415 | appropriately above. */ | |
4416 | xassert (i < desired_row->used[TEXT_AREA]); | |
4417 | } | |
4418 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
4419 | { | |
4420 | /* If old row extends to the end of the text area, clear. */ | |
4421 | if (i >= desired_row->used[TEXT_AREA]) | |
4422 | rif->cursor_to (vpos, i, desired_row->y, | |
23228cfa | 4423 | desired_row->pixel_width); |
5f5c8ee5 | 4424 | rif->clear_end_of_line (-1); |
408f5064 | 4425 | changed_p = 1; |
5f5c8ee5 GM |
4426 | } |
4427 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 4428 | { |
5f5c8ee5 GM |
4429 | /* Otherwise clear to the end of the old row. Everything |
4430 | after that position should be clear already. */ | |
4431 | int x; | |
177c0ea7 | 4432 | |
5f5c8ee5 GM |
4433 | if (i >= desired_row->used[TEXT_AREA]) |
4434 | rif->cursor_to (vpos, i, desired_row->y, | |
23228cfa | 4435 | desired_row->pixel_width); |
5f5c8ee5 GM |
4436 | |
4437 | /* If cursor is displayed at the end of the line, make sure | |
4438 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
4439 | with which to erase the cursor (because this method | |
4440 | doesn't work with lbearing/rbearing), so we must do it | |
4441 | this way. */ | |
4442 | if (vpos == w->phys_cursor.vpos | |
4443 | && w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]) | |
4444 | { | |
4445 | w->phys_cursor_on_p = 0; | |
4446 | x = -1; | |
4447 | } | |
4448 | else | |
23228cfa | 4449 | x = current_row->pixel_width; |
5f5c8ee5 | 4450 | rif->clear_end_of_line (x); |
408f5064 | 4451 | changed_p = 1; |
2e8907d3 | 4452 | } |
23b0200c | 4453 | } |
408f5064 GM |
4454 | |
4455 | return changed_p; | |
23b0200c | 4456 | } |
4588ec20 | 4457 | |
5f5c8ee5 | 4458 | |
408f5064 GM |
4459 | /* Update row VPOS in window W. Value is non-zero if display has been |
4460 | changed. */ | |
5f5c8ee5 | 4461 | |
408f5064 | 4462 | static int |
e876ff42 | 4463 | update_window_line (w, vpos, mouse_face_overwritten_p) |
5f5c8ee5 | 4464 | struct window *w; |
e876ff42 | 4465 | int vpos, *mouse_face_overwritten_p; |
5f5c8ee5 GM |
4466 | { |
4467 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
4468 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
408f5064 | 4469 | int changed_p = 0; |
5f5c8ee5 | 4470 | |
5f5c8ee5 GM |
4471 | /* Set the row being updated. This is important to let xterm.c |
4472 | know what line height values are in effect. */ | |
4473 | updated_row = desired_row; | |
4474 | ||
177c0ea7 JB |
4475 | /* A row can be completely invisible in case a desired matrix was |
4476 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
4477 | the matrix. Make sure to make such rows current anyway, since |
4478 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
4479 | if (desired_row->mode_line_p |
4480 | || desired_row->visible_height > 0) | |
408f5064 | 4481 | { |
504805ac GM |
4482 | xassert (desired_row->enabled_p); |
4483 | ||
4484 | /* Update display of the left margin area, if there is one. */ | |
4485 | if (!desired_row->full_width_p | |
7df02016 | 4486 | && !NILP (w->left_margin_cols)) |
504805ac GM |
4487 | { |
4488 | changed_p = 1; | |
4489 | update_marginal_area (w, LEFT_MARGIN_AREA, vpos); | |
4490 | } | |
177c0ea7 | 4491 | |
504805ac GM |
4492 | /* Update the display of the text area. */ |
4493 | if (update_text_area (w, vpos)) | |
4494 | { | |
4495 | changed_p = 1; | |
4496 | if (current_row->mouse_face_p) | |
4497 | *mouse_face_overwritten_p = 1; | |
4498 | } | |
177c0ea7 | 4499 | |
504805ac GM |
4500 | /* Update display of the right margin area, if there is one. */ |
4501 | if (!desired_row->full_width_p | |
7df02016 | 4502 | && !NILP (w->right_margin_cols)) |
504805ac GM |
4503 | { |
4504 | changed_p = 1; | |
4505 | update_marginal_area (w, RIGHT_MARGIN_AREA, vpos); | |
4506 | } | |
177c0ea7 | 4507 | |
504805ac GM |
4508 | /* Draw truncation marks etc. */ |
4509 | if (!current_row->enabled_p | |
4510 | || desired_row->y != current_row->y | |
4511 | || desired_row->visible_height != current_row->visible_height | |
4512 | || desired_row->overlay_arrow_p != current_row->overlay_arrow_p | |
4513 | || desired_row->truncated_on_left_p != current_row->truncated_on_left_p | |
4514 | || desired_row->truncated_on_right_p != current_row->truncated_on_right_p | |
4515 | || desired_row->continued_p != current_row->continued_p | |
4516 | || desired_row->mode_line_p != current_row->mode_line_p | |
4517 | || (desired_row->indicate_empty_line_p | |
4518 | != current_row->indicate_empty_line_p) | |
4519 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) | |
4520 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
4521 | rif->after_update_window_line_hook (desired_row); | |
408f5064 | 4522 | } |
177c0ea7 | 4523 | |
5f5c8ee5 GM |
4524 | /* Update current_row from desired_row. */ |
4525 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
4526 | updated_row = NULL; | |
408f5064 | 4527 | return changed_p; |
5f5c8ee5 GM |
4528 | } |
4529 | ||
4530 | ||
4531 | /* Set the cursor after an update of window W. This function may only | |
4532 | be called from update_window. */ | |
4533 | ||
4534 | static void | |
4535 | set_window_cursor_after_update (w) | |
4588ec20 JB |
4536 | struct window *w; |
4537 | { | |
5f5c8ee5 GM |
4538 | struct frame *f = XFRAME (w->frame); |
4539 | int cx, cy, vpos, hpos; | |
4540 | ||
4541 | /* Not intended for frame matrix updates. */ | |
4542 | xassert (FRAME_WINDOW_P (f)); | |
177c0ea7 | 4543 | |
b96fd3e8 GM |
4544 | if (cursor_in_echo_area |
4545 | && !NILP (echo_area_buffer[0]) | |
4546 | /* If we are showing a message instead of the mini-buffer, | |
4547 | show the cursor for the message instead. */ | |
4548 | && XWINDOW (minibuf_window) == w | |
4549 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
4550 | /* These cases apply only to the frame that contains |
4551 | the active mini-buffer window. */ | |
4552 | && FRAME_HAS_MINIBUF_P (f) | |
4553 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
4554 | { | |
4555 | cx = cy = vpos = hpos = 0; | |
4556 | ||
4557 | if (cursor_in_echo_area >= 0) | |
4558 | { | |
4559 | /* If the mini-buffer is several lines high, find the last | |
4560 | line that has any text on it. Note: either all lines | |
4561 | are enabled or none. Otherwise we wouldn't be able to | |
4562 | determine Y. */ | |
862b4790 GM |
4563 | struct glyph_row *row, *last_row; |
4564 | struct glyph *glyph; | |
4565 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 4566 | |
862b4790 | 4567 | last_row = NULL; |
6206f8ce GM |
4568 | row = w->current_matrix->rows; |
4569 | while (row->enabled_p | |
4570 | && (last_row == NULL | |
4571 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 4572 | { |
862b4790 GM |
4573 | if (row->used[TEXT_AREA] |
4574 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
4575 | last_row = row; | |
6206f8ce | 4576 | ++row; |
862b4790 | 4577 | } |
177c0ea7 | 4578 | |
5f5c8ee5 GM |
4579 | if (last_row) |
4580 | { | |
6206f8ce GM |
4581 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
4582 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 4583 | |
b96fd3e8 | 4584 | while (last > start && last->charpos < 0) |
862b4790 | 4585 | --last; |
177c0ea7 | 4586 | |
862b4790 GM |
4587 | for (glyph = start; glyph < last; ++glyph) |
4588 | { | |
4589 | cx += glyph->pixel_width; | |
4590 | ++hpos; | |
4591 | } | |
4592 | ||
5f5c8ee5 | 4593 | cy = last_row->y; |
862b4790 | 4594 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
4595 | } |
4596 | } | |
4597 | } | |
4598 | else | |
4599 | { | |
4600 | cx = w->cursor.x; | |
4601 | cy = w->cursor.y; | |
4602 | hpos = w->cursor.hpos; | |
4603 | vpos = w->cursor.vpos; | |
4604 | } | |
4588ec20 | 4605 | |
5f5c8ee5 GM |
4606 | /* Window cursor can be out of sync for horizontally split windows. */ |
4607 | hpos = max (0, hpos); | |
4608 | hpos = min (w->current_matrix->matrix_w - 1, hpos); | |
4609 | vpos = max (0, vpos); | |
4610 | vpos = min (w->current_matrix->nrows - 1, vpos); | |
4611 | rif->cursor_to (vpos, hpos, cy, cx); | |
4588ec20 | 4612 | } |
4588ec20 | 4613 | |
5f5c8ee5 | 4614 | |
6df5d75f GM |
4615 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window |
4616 | tree rooted at W. */ | |
4617 | ||
4618 | void | |
4619 | set_window_update_flags (w, on_p) | |
4620 | struct window *w; | |
4621 | int on_p; | |
4622 | { | |
4623 | while (w) | |
4624 | { | |
4625 | if (!NILP (w->hchild)) | |
4626 | set_window_update_flags (XWINDOW (w->hchild), on_p); | |
4627 | else if (!NILP (w->vchild)) | |
4628 | set_window_update_flags (XWINDOW (w->vchild), on_p); | |
4629 | else | |
4630 | w->must_be_updated_p = on_p; | |
4631 | ||
4632 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
4633 | } | |
177c0ea7 | 4634 | } |
6df5d75f GM |
4635 | |
4636 | ||
4637 | \f | |
4638 | /*********************************************************************** | |
4639 | Window-Based Scrolling | |
4640 | ***********************************************************************/ | |
4641 | ||
4642 | /* Structure describing rows in scrolling_window. */ | |
4643 | ||
4644 | struct row_entry | |
4645 | { | |
4646 | /* Number of occurrences of this row in desired and current matrix. */ | |
4647 | int old_uses, new_uses; | |
177c0ea7 | 4648 | |
6df5d75f GM |
4649 | /* Vpos of row in new matrix. */ |
4650 | int new_line_number; | |
4651 | ||
4652 | /* Bucket index of this row_entry in the hash table row_table. */ | |
4653 | int bucket; | |
177c0ea7 | 4654 | |
6df5d75f GM |
4655 | /* The row described by this entry. */ |
4656 | struct glyph_row *row; | |
177c0ea7 | 4657 | |
6df5d75f GM |
4658 | /* Hash collision chain. */ |
4659 | struct row_entry *next; | |
4660 | }; | |
4661 | ||
4662 | /* A pool to allocate row_entry structures from, and the size of the | |
4663 | pool. The pool is reallocated in scrolling_window when we find | |
4664 | that we need a larger one. */ | |
4665 | ||
4666 | static struct row_entry *row_entry_pool; | |
4667 | static int row_entry_pool_size; | |
4668 | ||
4669 | /* Index of next free entry in row_entry_pool. */ | |
4670 | ||
4671 | static int row_entry_idx; | |
4672 | ||
4673 | /* The hash table used during scrolling, and the table's size. This | |
4674 | table is used to quickly identify equal rows in the desired and | |
4675 | current matrix. */ | |
4676 | ||
4677 | static struct row_entry **row_table; | |
4678 | static int row_table_size; | |
4679 | ||
4680 | /* Vectors of pointers to row_entry structures belonging to the | |
4681 | current and desired matrix, and the size of the vectors. */ | |
4682 | ||
4683 | static struct row_entry **old_lines, **new_lines; | |
4684 | static int old_lines_size, new_lines_size; | |
4685 | ||
4686 | /* A pool to allocate run structures from, and its size. */ | |
4687 | ||
4688 | static struct run *run_pool; | |
4689 | static int runs_size; | |
4690 | ||
4691 | /* A vector of runs of lines found during scrolling. */ | |
4692 | ||
4693 | static struct run **runs; | |
4694 | ||
6df5d75f GM |
4695 | /* Add glyph row ROW to the scrolling hash table during the scrolling |
4696 | of window W. */ | |
4697 | ||
4698 | static INLINE struct row_entry * | |
4699 | add_row_entry (w, row) | |
4700 | struct window *w; | |
4701 | struct glyph_row *row; | |
4702 | { | |
4703 | struct row_entry *entry; | |
4704 | int i = row->hash % row_table_size; | |
177c0ea7 | 4705 | |
6df5d75f | 4706 | entry = row_table[i]; |
e4e0bee9 | 4707 | while (entry && !row_equal_p (w, entry->row, row, 1)) |
6df5d75f | 4708 | entry = entry->next; |
177c0ea7 | 4709 | |
6df5d75f GM |
4710 | if (entry == NULL) |
4711 | { | |
4712 | entry = row_entry_pool + row_entry_idx++; | |
4713 | entry->row = row; | |
4714 | entry->old_uses = entry->new_uses = 0; | |
4715 | entry->new_line_number = 0; | |
4716 | entry->bucket = i; | |
4717 | entry->next = row_table[i]; | |
4718 | row_table[i] = entry; | |
4719 | } | |
4720 | ||
4721 | return entry; | |
4722 | } | |
4723 | ||
4724 | ||
5f5c8ee5 | 4725 | /* Try to reuse part of the current display of W by scrolling lines. |
153a073c | 4726 | HEADER_LINE_P non-zero means W has a header line. |
5f5c8ee5 GM |
4727 | |
4728 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4729 | Technique for Isolating Differences Between Files." It should take | |
4730 | O(N) time. | |
4731 | ||
4732 | A short outline of the steps of the algorithm | |
4733 | ||
4734 | 1. Skip lines equal at the start and end of both matrices. | |
4735 | ||
4736 | 2. Enter rows in the current and desired matrix into a symbol | |
4737 | table, counting how often they appear in both matrices. | |
4738 | ||
4739 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4740 | i.e. we assume that such lines are likely to have been moved. | |
4741 | ||
4742 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4743 | forward and backward. | |
4744 | ||
4745 | Value is | |
4746 | ||
4747 | -1 if all rows were found to be equal. | |
4748 | 0 to indicate that we did not scroll the display, or | |
4749 | 1 if we did scroll. */ | |
4750 | ||
4751 | static int | |
045dee35 | 4752 | scrolling_window (w, header_line_p) |
5f5c8ee5 | 4753 | struct window *w; |
045dee35 | 4754 | int header_line_p; |
4588ec20 | 4755 | { |
5f5c8ee5 GM |
4756 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4757 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4758 | int yb = window_text_bottom_y (w); | |
6df5d75f GM |
4759 | int i, j, first_old, first_new, last_old, last_new; |
4760 | int nruns, nbytes, n, run_idx; | |
4761 | struct row_entry *entry; | |
5f5c8ee5 GM |
4762 | |
4763 | /* Skip over rows equal at the start. */ | |
bfdcafe1 | 4764 | for (i = header_line_p ? 1 : 0; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4765 | { |
bfdcafe1 GM |
4766 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4767 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4768 | ||
4769 | if (c->enabled_p | |
4770 | && d->enabled_p | |
4771 | && c->y == d->y | |
4772 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4773 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
4774 | && row_equal_p (w, c, d, 1)) | |
4775 | { | |
4776 | assign_row (c, d); | |
4777 | d->enabled_p = 0; | |
4778 | } | |
4779 | else | |
4780 | break; | |
5f5c8ee5 | 4781 | } |
4588ec20 | 4782 | |
5f5c8ee5 GM |
4783 | /* Give up if some rows in the desired matrix are not enabled. */ |
4784 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4785 | return -1; | |
177c0ea7 | 4786 | |
5f5c8ee5 GM |
4787 | first_old = first_new = i; |
4788 | ||
4789 | /* Set last_new to the index + 1 of the last enabled row in the | |
4790 | desired matrix. */ | |
4791 | i = first_new + 1; | |
4792 | while (i < desired_matrix->nrows - 1 | |
4793 | && MATRIX_ROW (desired_matrix, i)->enabled_p | |
6df5d75f | 4794 | && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)) <= yb) |
5f5c8ee5 GM |
4795 | ++i; |
4796 | ||
4797 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4798 | return 0; | |
4799 | ||
4800 | last_new = i; | |
4801 | ||
4802 | /* Set last_old to the index + 1 of the last enabled row in the | |
4803 | current matrix. We don't look at the enabled flag here because | |
4804 | we plan to reuse part of the display even if other parts are | |
4805 | disabled. */ | |
4806 | i = first_old + 1; | |
93962bfa GM |
4807 | while (i < current_matrix->nrows - 1) |
4808 | { | |
4809 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4810 | if (bottom <= yb) | |
4811 | ++i; | |
4812 | if (bottom >= yb) | |
4813 | break; | |
4814 | } | |
4815 | ||
5f5c8ee5 GM |
4816 | last_old = i; |
4817 | ||
4818 | /* Skip over rows equal at the bottom. */ | |
4819 | i = last_new; | |
4820 | j = last_old; | |
4821 | while (i - 1 > first_new | |
4822 | && j - 1 > first_old | |
4823 | && MATRIX_ROW (current_matrix, i - 1)->enabled_p | |
4824 | && (MATRIX_ROW (current_matrix, i - 1)->y | |
4825 | == MATRIX_ROW (desired_matrix, j - 1)->y) | |
4826 | && row_equal_p (w, | |
4827 | MATRIX_ROW (desired_matrix, i - 1), | |
e4e0bee9 | 4828 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
4829 | --i, --j; |
4830 | last_new = i; | |
4831 | last_old = j; | |
4832 | ||
4833 | /* Nothing to do if all rows are equal. */ | |
4834 | if (last_new == first_new) | |
4835 | return 0; | |
4836 | ||
6df5d75f | 4837 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 4838 | |
6df5d75f GM |
4839 | if (current_matrix->nrows > old_lines_size) |
4840 | { | |
4841 | old_lines_size = current_matrix->nrows; | |
4842 | nbytes = old_lines_size * sizeof *old_lines; | |
4843 | old_lines = (struct row_entry **) xrealloc (old_lines, nbytes); | |
4844 | } | |
177c0ea7 | 4845 | |
6df5d75f GM |
4846 | if (desired_matrix->nrows > new_lines_size) |
4847 | { | |
4848 | new_lines_size = desired_matrix->nrows; | |
4849 | nbytes = new_lines_size * sizeof *new_lines; | |
4850 | new_lines = (struct row_entry **) xrealloc (new_lines, nbytes); | |
4851 | } | |
4852 | ||
4853 | n = desired_matrix->nrows + current_matrix->nrows; | |
4854 | if (3 * n > row_table_size) | |
4855 | { | |
4856 | row_table_size = next_almost_prime (3 * n); | |
4857 | nbytes = row_table_size * sizeof *row_table; | |
4858 | row_table = (struct row_entry **) xrealloc (row_table, nbytes); | |
4859 | bzero (row_table, nbytes); | |
4860 | } | |
4861 | ||
4862 | if (n > row_entry_pool_size) | |
4863 | { | |
4864 | row_entry_pool_size = n; | |
4865 | nbytes = row_entry_pool_size * sizeof *row_entry_pool; | |
4866 | row_entry_pool = (struct row_entry *) xrealloc (row_entry_pool, nbytes); | |
4867 | } | |
4868 | ||
4869 | if (desired_matrix->nrows > runs_size) | |
4870 | { | |
4871 | runs_size = desired_matrix->nrows; | |
4872 | nbytes = runs_size * sizeof *runs; | |
4873 | runs = (struct run **) xrealloc (runs, nbytes); | |
4874 | nbytes = runs_size * sizeof *run_pool; | |
4875 | run_pool = (struct run *) xrealloc (run_pool, nbytes); | |
4876 | } | |
4877 | ||
4878 | nruns = run_idx = 0; | |
4879 | row_entry_idx = 0; | |
4880 | ||
4881 | /* Add rows from the current and desired matrix to the hash table | |
4882 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 4883 | |
5f5c8ee5 GM |
4884 | for (i = first_old; i < last_old; ++i) |
4885 | { | |
4886 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
4887 | { | |
6df5d75f GM |
4888 | entry = add_row_entry (w, MATRIX_ROW (current_matrix, i)); |
4889 | old_lines[i] = entry; | |
4890 | ++entry->old_uses; | |
5f5c8ee5 GM |
4891 | } |
4892 | else | |
6df5d75f | 4893 | old_lines[i] = NULL; |
5f5c8ee5 GM |
4894 | } |
4895 | ||
5f5c8ee5 GM |
4896 | for (i = first_new; i < last_new; ++i) |
4897 | { | |
4898 | xassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); | |
6df5d75f GM |
4899 | entry = add_row_entry (w, MATRIX_ROW (desired_matrix, i)); |
4900 | ++entry->new_uses; | |
4901 | entry->new_line_number = i; | |
4902 | new_lines[i] = entry; | |
5f5c8ee5 | 4903 | } |
4588ec20 | 4904 | |
5f5c8ee5 GM |
4905 | /* Identify moves based on lines that are unique and equal |
4906 | in both matrices. */ | |
4907 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
4908 | if (old_lines[i] |
4909 | && old_lines[i]->old_uses == 1 | |
4910 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 GM |
4911 | { |
4912 | int j, k; | |
6df5d75f GM |
4913 | int new_line = old_lines[i]->new_line_number; |
4914 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
4915 | |
4916 | /* Record move. */ | |
4917 | run->current_vpos = i; | |
4918 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
4919 | run->desired_vpos = new_line; | |
4920 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
4921 | run->nrows = 1; | |
4922 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
4923 | ||
4924 | /* Extend backward. */ | |
4925 | j = i - 1; | |
4926 | k = new_line - 1; | |
4927 | while (j > first_old | |
4928 | && k > first_new | |
6df5d75f | 4929 | && old_lines[j] == new_lines[k]) |
5f5c8ee5 GM |
4930 | { |
4931 | int h = MATRIX_ROW (current_matrix, j)->height; | |
177c0ea7 JB |
4932 | --run->current_vpos; |
4933 | --run->desired_vpos; | |
5f5c8ee5 GM |
4934 | ++run->nrows; |
4935 | run->height += h; | |
4936 | run->desired_y -= h; | |
4937 | run->current_y -= h; | |
4938 | --j, --k; | |
4939 | } | |
4588ec20 | 4940 | |
5f5c8ee5 GM |
4941 | /* Extend forward. */ |
4942 | j = i + 1; | |
4943 | k = new_line + 1; | |
4944 | while (j < last_old | |
4945 | && k < last_new | |
6df5d75f | 4946 | && old_lines[j] == new_lines[k]) |
5f5c8ee5 GM |
4947 | { |
4948 | int h = MATRIX_ROW (current_matrix, j)->height; | |
177c0ea7 | 4949 | ++run->nrows; |
5f5c8ee5 GM |
4950 | run->height += h; |
4951 | ++j, ++k; | |
4952 | } | |
19dff8dc | 4953 | |
5f5c8ee5 GM |
4954 | /* Insert run into list of all runs. Order runs by copied |
4955 | pixel lines. Note that we record runs that don't have to | |
4956 | be copied because they are already in place. This is done | |
4957 | because we can avoid calling update_window_line in this | |
4958 | case. */ | |
4959 | for (j = 0; j < nruns && runs[j]->height > run->height; ++j) | |
4960 | ; | |
2b4ec4d7 | 4961 | for (k = nruns; k > j; --k) |
5f5c8ee5 GM |
4962 | runs[k] = runs[k - 1]; |
4963 | runs[j] = run; | |
4964 | ++nruns; | |
4965 | ||
4966 | i += run->nrows; | |
4967 | } | |
4968 | else | |
4969 | ++i; | |
4588ec20 | 4970 | |
5f5c8ee5 GM |
4971 | /* Do the moves. Do it in a way that we don't overwrite something |
4972 | we want to copy later on. This is not solvable in general | |
4973 | because there is only one display and we don't have a way to | |
4974 | exchange areas on this display. Example: | |
4588ec20 | 4975 | |
5f5c8ee5 GM |
4976 | +-----------+ +-----------+ |
4977 | | A | | B | | |
4978 | +-----------+ --> +-----------+ | |
4979 | | B | | A | | |
4980 | +-----------+ +-----------+ | |
4588ec20 | 4981 | |
5f5c8ee5 GM |
4982 | Instead, prefer bigger moves, and invalidate moves that would |
4983 | copy from where we copied to. */ | |
ea0d86af | 4984 | |
5f5c8ee5 GM |
4985 | for (i = 0; i < nruns; ++i) |
4986 | if (runs[i]->nrows > 0) | |
4987 | { | |
4988 | struct run *r = runs[i]; | |
24e86043 | 4989 | |
5f5c8ee5 GM |
4990 | /* Copy on the display. */ |
4991 | if (r->current_y != r->desired_y) | |
4992 | { | |
4993 | rif->scroll_run_hook (w, r); | |
4994 | ||
4995 | /* Invalidate runs that copy from where we copied to. */ | |
4996 | for (j = i + 1; j < nruns; ++j) | |
4997 | { | |
4998 | struct run *p = runs[j]; | |
177c0ea7 | 4999 | |
5f5c8ee5 GM |
5000 | if ((p->current_y >= r->desired_y |
5001 | && p->current_y < r->desired_y + r->height) | |
5002 | || (p->current_y + p->height >= r->desired_y | |
5003 | && (p->current_y + p->height | |
5004 | < r->desired_y + r->height))) | |
5005 | p->nrows = 0; | |
5006 | } | |
5007 | } | |
ea0d86af | 5008 | |
5f5c8ee5 GM |
5009 | /* Assign matrix rows. */ |
5010 | for (j = 0; j < r->nrows; ++j) | |
5011 | { | |
5012 | struct glyph_row *from, *to; | |
408f5064 | 5013 | int to_overlapped_p; |
e876ff42 | 5014 | |
5f5c8ee5 GM |
5015 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
5016 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 5017 | to_overlapped_p = to->overlapped_p; |
5f5c8ee5 GM |
5018 | assign_row (to, from); |
5019 | to->enabled_p = 1, from->enabled_p = 0; | |
408f5064 | 5020 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
5021 | } |
5022 | } | |
15874c59 | 5023 | |
6df5d75f GM |
5024 | /* Clear the hash table, for the next time. */ |
5025 | for (i = 0; i < row_entry_idx; ++i) | |
5026 | row_table[row_entry_pool[i].bucket] = NULL; | |
5027 | ||
5f5c8ee5 GM |
5028 | /* Value is non-zero to indicate that we scrolled the display. */ |
5029 | return 1; | |
5030 | } | |
de83c314 | 5031 | |
15874c59 | 5032 | |
4588ec20 | 5033 | \f |
5f5c8ee5 GM |
5034 | /************************************************************************ |
5035 | Frame-Based Updates | |
5036 | ************************************************************************/ | |
4588ec20 | 5037 | |
5f5c8ee5 | 5038 | /* Update the desired frame matrix of frame F. |
4588ec20 | 5039 | |
5f5c8ee5 GM |
5040 | FORCE_P non-zero means that the update should not be stopped by |
5041 | pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling | |
5042 | should not be tried. | |
5043 | ||
5044 | Value is non-zero if update was stopped due to pending input. */ | |
5045 | ||
5046 | static int | |
5047 | update_frame_1 (f, force_p, inhibit_id_p) | |
5048 | struct frame *f; | |
5049 | int force_p; | |
5050 | int inhibit_id_p; | |
4588ec20 | 5051 | { |
5f5c8ee5 GM |
5052 | /* Frame matrices to work on. */ |
5053 | struct glyph_matrix *current_matrix = f->current_matrix; | |
5054 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5055 | int i; | |
4588ec20 JB |
5056 | int pause; |
5057 | int preempt_count = baud_rate / 2400 + 1; | |
dfcf069d | 5058 | extern int input_pending; |
5f5c8ee5 GM |
5059 | |
5060 | xassert (current_matrix && desired_matrix); | |
4588ec20 | 5061 | |
c37e4889 RS |
5062 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
5063 | calculate_costs (f); | |
5064 | ||
d88c2b9e RS |
5065 | if (preempt_count <= 0) |
5066 | preempt_count = 1; | |
5067 | ||
e7067d00 GM |
5068 | if (redisplay_dont_pause) |
5069 | force_p = 1; | |
5070 | else if (!force_p && detect_input_pending ()) | |
4588ec20 JB |
5071 | { |
5072 | pause = 1; | |
5073 | goto do_pause; | |
5074 | } | |
5075 | ||
5f5c8ee5 | 5076 | /* If we cannot insert/delete lines, it's no use trying it. */ |
28d440ab | 5077 | if (!TTY_LINE_INS_DEL_OK (FRAME_TTY (f))) |
5f5c8ee5 | 5078 | inhibit_id_p = 1; |
7098a0fa | 5079 | |
efb859b4 | 5080 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
5081 | i/d line if just want cursor motion. */ |
5082 | for (i = 0; i < desired_matrix->nrows; i++) | |
5083 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
5084 | break; |
5085 | ||
5086 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
5087 | if (!inhibit_id_p && i < desired_matrix->nrows) |
5088 | force_p |= scrolling (f); | |
4588ec20 JB |
5089 | |
5090 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
5091 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
5092 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 5093 | |
5f5c8ee5 GM |
5094 | /* Now update the rest of the lines. */ |
5095 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 5096 | { |
5f5c8ee5 | 5097 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 5098 | { |
b6a65ac2 | 5099 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
5100 | { |
5101 | /* Flush out every so many lines. | |
5102 | Also flush out if likely to have more than 1k buffered | |
5103 | otherwise. I'm told that some telnet connections get | |
5104 | really screwed by more than 1k output at once. */ | |
5105 | int outq = PENDING_OUTPUT_COUNT (stdout); | |
5106 | if (outq > 900 | |
5107 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
5108 | { | |
5109 | fflush (stdout); | |
5110 | if (preempt_count == 1) | |
5111 | { | |
a41f8bed JB |
5112 | #ifdef EMACS_OUTQSIZE |
5113 | if (EMACS_OUTQSIZE (0, &outq) < 0) | |
4588ec20 | 5114 | /* Probably not a tty. Ignore the error and reset |
153a073c | 5115 | the outq count. */ |
4588ec20 JB |
5116 | outq = PENDING_OUTPUT_COUNT (stdout); |
5117 | #endif | |
5118 | outq *= 10; | |
d520f0d2 | 5119 | if (baud_rate <= outq && baud_rate > 0) |
d88c2b9e | 5120 | sleep (outq / baud_rate); |
4588ec20 JB |
5121 | } |
5122 | } | |
4588ec20 JB |
5123 | } |
5124 | ||
a2960116 RS |
5125 | if ((i - 1) % preempt_count == 0) |
5126 | detect_input_pending (); | |
5127 | ||
5f5c8ee5 | 5128 | update_frame_line (f, i); |
4588ec20 | 5129 | } |
4588ec20 | 5130 | } |
177c0ea7 | 5131 | |
7df02016 | 5132 | pause = (i < FRAME_LINES (f) - 1) ? i : 0; |
4588ec20 JB |
5133 | |
5134 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
5135 | if (!pause) | |
5136 | { | |
48cf7030 | 5137 | if ((cursor_in_echo_area |
5f5c8ee5 | 5138 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 5139 | show the cursor for the message instead of for the |
5f5c8ee5 | 5140 | (now hidden) mini-buffer contents. */ |
2577053b RS |
5141 | || (EQ (minibuf_window, selected_window) |
5142 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 5143 | && !NILP (echo_area_buffer[0]))) |
2577053b | 5144 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 5145 | the active mini-buffer window. */ |
2577053b | 5146 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 5147 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 5148 | { |
7df02016 | 5149 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
5150 | int row, col; |
5151 | ||
5152 | if (cursor_in_echo_area < 0) | |
5153 | { | |
5f5c8ee5 GM |
5154 | /* Negative value of cursor_in_echo_area means put |
5155 | cursor at beginning of line. */ | |
648fa17d JB |
5156 | row = top; |
5157 | col = 0; | |
5158 | } | |
1113d9db | 5159 | else |
648fa17d | 5160 | { |
5f5c8ee5 GM |
5161 | /* Positive value of cursor_in_echo_area means put |
5162 | cursor at the end of the prompt. If the mini-buffer | |
5163 | is several lines high, find the last line that has | |
5164 | any text on it. */ | |
7df02016 | 5165 | row = FRAME_LINES (f); |
177c0ea7 | 5166 | do |
648fa17d | 5167 | { |
5f5c8ee5 GM |
5168 | --row; |
5169 | col = 0; | |
177c0ea7 | 5170 | |
5f5c8ee5 GM |
5171 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
5172 | { | |
5173 | /* Frame rows are filled up with spaces that | |
5174 | must be ignored here. */ | |
5f5c8ee5 GM |
5175 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
5176 | row); | |
5177 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
5178 | struct glyph *last = start + r->used[TEXT_AREA]; | |
5179 | ||
5180 | while (last > start | |
5181 | && (last - 1)->charpos < 0) | |
5182 | --last; | |
177c0ea7 | 5183 | |
5f5c8ee5 GM |
5184 | col = last - start; |
5185 | } | |
648fa17d JB |
5186 | } |
5187 | while (row > top && col == 0); | |
5188 | ||
6395da5c | 5189 | /* Make sure COL is not out of range. */ |
868e640e | 5190 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 5191 | { |
6395da5c | 5192 | /* If we have another row, advance cursor into it. */ |
7df02016 | 5193 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 5194 | { |
7df02016 | 5195 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
5196 | row++; |
5197 | } | |
5198 | /* Otherwise move it back in range. */ | |
5199 | else | |
868e640e | 5200 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
5201 | } |
5202 | } | |
5203 | ||
5204 | cursor_to (row, col); | |
1113d9db | 5205 | } |
4588ec20 | 5206 | else |
5f5c8ee5 GM |
5207 | { |
5208 | /* We have only one cursor on terminal frames. Use it to | |
5209 | display the cursor of the selected window. */ | |
5210 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
5211 | if (w->cursor.vpos >= 0 |
5212 | /* The cursor vpos may be temporarily out of bounds | |
5213 | in the following situation: There is one window, | |
5214 | with the cursor in the lower half of it. The window | |
5215 | is split, and a message causes a redisplay before | |
5216 | a new cursor position has been computed. */ | |
7df02016 | 5217 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
5218 | { |
5219 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
5220 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
5221 | ||
7df02016 KS |
5222 | if (INTEGERP (w->left_margin_cols)) |
5223 | x += XFASTINT (w->left_margin_cols); | |
177c0ea7 | 5224 | |
7df02016 | 5225 | /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */ |
5f5c8ee5 GM |
5226 | cursor_to (y, x); |
5227 | } | |
5228 | } | |
4588ec20 JB |
5229 | } |
5230 | ||
4588ec20 JB |
5231 | do_pause: |
5232 | ||
5f5c8ee5 | 5233 | clear_desired_matrices (f); |
4588ec20 JB |
5234 | return pause; |
5235 | } | |
5236 | ||
4588ec20 | 5237 | |
5f5c8ee5 | 5238 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 5239 | |
dfcf069d | 5240 | int |
502b9b64 | 5241 | scrolling (frame) |
5f5c8ee5 | 5242 | struct frame *frame; |
4588ec20 JB |
5243 | { |
5244 | int unchanged_at_top, unchanged_at_bottom; | |
5245 | int window_size; | |
5246 | int changed_lines; | |
7df02016 KS |
5247 | int *old_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); |
5248 | int *new_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
5249 | int *draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
5250 | int *old_draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 5251 | register int i; |
7df02016 | 5252 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
5253 | struct glyph_matrix *current_matrix = frame->current_matrix; |
5254 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 5255 | |
5f5c8ee5 GM |
5256 | if (!current_matrix) |
5257 | abort (); | |
4588ec20 | 5258 | |
5f5c8ee5 GM |
5259 | /* Compute hash codes of all the lines. Also calculate number of |
5260 | changed lines, number of unchanged lines at the beginning, and | |
5261 | number of unchanged lines at the end. */ | |
4588ec20 JB |
5262 | changed_lines = 0; |
5263 | unchanged_at_top = 0; | |
7df02016 KS |
5264 | unchanged_at_bottom = FRAME_LINES (frame); |
5265 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
5266 | { |
5267 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 5268 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 5269 | return 0; |
5f5c8ee5 GM |
5270 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
5271 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
5272 | { |
5273 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
5274 | new_hash[i] = old_hash[i]; | |
5275 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
5276 | draw_cost[i] = INFINITY; | |
5277 | } | |
4588ec20 | 5278 | else |
f188b3c4 | 5279 | { |
5f5c8ee5 GM |
5280 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
5281 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 5282 | } |
4588ec20 JB |
5283 | |
5284 | if (old_hash[i] != new_hash[i]) | |
5285 | { | |
5286 | changed_lines++; | |
7df02016 | 5287 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
5288 | } |
5289 | else if (i == unchanged_at_top) | |
5290 | unchanged_at_top++; | |
5f5c8ee5 | 5291 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
5292 | } |
5293 | ||
5294 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
28d440ab | 5295 | if ((!TTY_SCROLL_REGION_OK (FRAME_TTY (frame)) |
8a56675d | 5296 | && changed_lines < baud_rate / 2400) |
7df02016 | 5297 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
5298 | return 1; |
5299 | ||
7df02016 | 5300 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
5301 | - unchanged_at_bottom); |
5302 | ||
28d440ab | 5303 | if (TTY_SCROLL_REGION_OK (FRAME_TTY (frame))) |
4588ec20 | 5304 | free_at_end_vpos -= unchanged_at_bottom; |
28d440ab | 5305 | else if (TTY_MEMORY_BELOW_FRAME (FRAME_TTY (frame))) |
4588ec20 JB |
5306 | free_at_end_vpos = -1; |
5307 | ||
5308 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 5309 | current frame and desired frame, don't bother with i/d calc. */ |
28d440ab | 5310 | if (!TTY_SCROLL_REGION_OK (FRAME_TTY (frame)) |
8a56675d | 5311 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
5312 | && (window_size >= |
5313 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 5314 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
5315 | old_hash, new_hash, draw_cost))) |
5316 | return 0; | |
5317 | ||
5f5c8ee5 GM |
5318 | if (window_size < 2) |
5319 | return 0; | |
5320 | ||
502b9b64 | 5321 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 5322 | draw_cost + unchanged_at_top - 1, |
190bb91a | 5323 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
5324 | old_hash + unchanged_at_top - 1, |
5325 | new_hash + unchanged_at_top - 1, | |
5326 | free_at_end_vpos - unchanged_at_top); | |
5327 | ||
5328 | return 0; | |
5329 | } | |
4588ec20 | 5330 | |
4588ec20 | 5331 | |
5f5c8ee5 GM |
5332 | /* Count the number of blanks at the start of the vector of glyphs R |
5333 | which is LEN glyphs long. */ | |
4588ec20 | 5334 | |
4588ec20 | 5335 | static int |
5f5c8ee5 GM |
5336 | count_blanks (r, len) |
5337 | struct glyph *r; | |
5338 | int len; | |
4588ec20 | 5339 | { |
5f5c8ee5 | 5340 | int i; |
177c0ea7 | 5341 | |
5f5c8ee5 GM |
5342 | for (i = 0; i < len; ++i) |
5343 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
5344 | break; | |
5345 | ||
5346 | return i; | |
4588ec20 JB |
5347 | } |
5348 | ||
5f5c8ee5 GM |
5349 | |
5350 | /* Count the number of glyphs in common at the start of the glyph | |
5351 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
5352 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
5353 | ||
4588ec20 | 5354 | static int |
5f5c8ee5 GM |
5355 | count_match (str1, end1, str2, end2) |
5356 | struct glyph *str1, *end1, *str2, *end2; | |
4588ec20 | 5357 | { |
5f5c8ee5 GM |
5358 | struct glyph *p1 = str1; |
5359 | struct glyph *p2 = str2; | |
177c0ea7 | 5360 | |
5f5c8ee5 GM |
5361 | while (p1 < end1 |
5362 | && p2 < end2 | |
42186983 | 5363 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 5364 | ++p1, ++p2; |
177c0ea7 | 5365 | |
5f5c8ee5 | 5366 | return p1 - str1; |
4588ec20 JB |
5367 | } |
5368 | ||
5f5c8ee5 | 5369 | |
4588ec20 | 5370 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 5371 | |
5f5c8ee5 | 5372 | extern int *char_ins_del_vector; |
7df02016 | 5373 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))]) |
4588ec20 | 5374 | |
5f5c8ee5 GM |
5375 | |
5376 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
5377 | ||
4588ec20 | 5378 | static void |
c363a1d6 GM |
5379 | update_frame_line (f, vpos) |
5380 | struct frame *f; | |
4588ec20 JB |
5381 | int vpos; |
5382 | { | |
5f5c8ee5 | 5383 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
5384 | int tem; |
5385 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
5386 | struct glyph_matrix *current_matrix = f->current_matrix; |
5387 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
5388 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
5389 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
5390 | int must_write_whole_line_p; | |
28d440ab | 5391 | int write_spaces_p = TTY_MUST_WRITE_SPACES (FRAME_TTY (f)); |
c363a1d6 | 5392 | int colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background |
0a894bad GM |
5393 | != FACE_TTY_DEFAULT_BG_COLOR); |
5394 | ||
5395 | if (colored_spaces_p) | |
5396 | write_spaces_p = 1; | |
5f5c8ee5 | 5397 | |
26c63686 GM |
5398 | /* Current row not enabled means it has unknown contents. We must |
5399 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
5400 | must_write_whole_line_p = !current_row->enabled_p; |
5401 | if (must_write_whole_line_p) | |
4588ec20 | 5402 | { |
5f5c8ee5 | 5403 | obody = 0; |
4588ec20 JB |
5404 | olen = 0; |
5405 | } | |
5406 | else | |
5407 | { | |
5f5c8ee5 GM |
5408 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
5409 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 5410 | |
4cecaab8 MB |
5411 | /* Ignore trailing spaces, if we can. */ |
5412 | if (!write_spaces_p) | |
5413 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
5414 | olen--; | |
4588ec20 JB |
5415 | } |
5416 | ||
5f5c8ee5 GM |
5417 | current_row->enabled_p = 1; |
5418 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 5419 | |
5f5c8ee5 GM |
5420 | /* If desired line is empty, just clear the line. */ |
5421 | if (!desired_row->enabled_p) | |
4588ec20 JB |
5422 | { |
5423 | nlen = 0; | |
5424 | goto just_erase; | |
5425 | } | |
5426 | ||
5f5c8ee5 GM |
5427 | nbody = desired_row->glyphs[TEXT_AREA]; |
5428 | nlen = desired_row->used[TEXT_AREA]; | |
5429 | nend = nbody + nlen; | |
5430 | ||
5431 | /* If display line has unknown contents, write the whole line. */ | |
5432 | if (must_write_whole_line_p) | |
5433 | { | |
26c63686 | 5434 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 5435 | if (!write_spaces_p) |
74ca462f GM |
5436 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
5437 | --nlen; | |
5438 | ||
26c63686 | 5439 | /* Write the contents of the desired line. */ |
74ca462f | 5440 | if (nlen) |
26c63686 GM |
5441 | { |
5442 | cursor_to (vpos, 0); | |
5443 | write_glyphs (nbody, nlen); | |
5444 | } | |
177c0ea7 | 5445 | |
26c63686 GM |
5446 | /* Don't call clear_end_of_line if we already wrote the whole |
5447 | line. The cursor will not be at the right margin in that | |
5448 | case but in the line below. */ | |
7df02016 | 5449 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 GM |
5450 | { |
5451 | cursor_to (vpos, nlen); | |
7df02016 | 5452 | clear_end_of_line (FRAME_TOTAL_COLS (f)); |
26c63686 | 5453 | } |
58827478 GM |
5454 | else |
5455 | /* Make sure we are in the right row, otherwise cursor movement | |
5456 | with cmgoto might use `ch' in the wrong row. */ | |
5457 | cursor_to (vpos, 0); | |
177c0ea7 | 5458 | |
5f5c8ee5 GM |
5459 | make_current (desired_matrix, current_matrix, vpos); |
5460 | return; | |
5461 | } | |
4588ec20 JB |
5462 | |
5463 | /* Pretend trailing spaces are not there at all, | |
5464 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
5465 | if (!write_spaces_p) |
5466 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
5467 | nlen--; | |
4588ec20 JB |
5468 | |
5469 | /* If there's no i/d char, quickly do the best we can without it. */ | |
28d440ab | 5470 | if (!TTY_CHAR_INS_DEL_OK (FRAME_TTY (f))) |
4588ec20 | 5471 | { |
5f5c8ee5 | 5472 | int i, j; |
4588ec20 | 5473 | |
5f5c8ee5 GM |
5474 | /* Find the first glyph in desired row that doesn't agree with |
5475 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
5476 | for (i = 0; i < nlen; i++) |
5477 | { | |
5f5c8ee5 | 5478 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 5479 | { |
5f5c8ee5 GM |
5480 | /* Find the end of the run of different glyphs. */ |
5481 | j = i + 1; | |
5482 | while (j < nlen | |
5483 | && (j >= olen | |
5484 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
5485 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
5486 | ++j; | |
177c0ea7 JB |
5487 | |
5488 | /* Output this run of non-matching chars. */ | |
5f5c8ee5 GM |
5489 | cursor_to (vpos, i); |
5490 | write_glyphs (nbody + i, j - i); | |
5491 | i = j - 1; | |
4588ec20 JB |
5492 | |
5493 | /* Now find the next non-match. */ | |
5494 | } | |
5495 | } | |
5496 | ||
5497 | /* Clear the rest of the line, or the non-clear part of it. */ | |
5498 | if (olen > nlen) | |
5499 | { | |
5500 | cursor_to (vpos, nlen); | |
5501 | clear_end_of_line (olen); | |
5502 | } | |
5503 | ||
5f5c8ee5 GM |
5504 | /* Make current row = desired row. */ |
5505 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
5506 | return; |
5507 | } | |
5508 | ||
5f5c8ee5 GM |
5509 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
5510 | characters in a row. */ | |
5511 | ||
4588ec20 JB |
5512 | if (!olen) |
5513 | { | |
5f5c8ee5 GM |
5514 | /* If current line is blank, skip over initial spaces, if |
5515 | possible, and write the rest. */ | |
4cecaab8 | 5516 | if (write_spaces_p) |
5f5c8ee5 GM |
5517 | nsp = 0; |
5518 | else | |
5519 | nsp = count_blanks (nbody, nlen); | |
5520 | ||
4588ec20 JB |
5521 | if (nlen > nsp) |
5522 | { | |
5523 | cursor_to (vpos, nsp); | |
5524 | write_glyphs (nbody + nsp, nlen - nsp); | |
5525 | } | |
5526 | ||
502b9b64 | 5527 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 5528 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
5529 | return; |
5530 | } | |
5531 | ||
4588ec20 | 5532 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 5533 | osp = count_blanks (obody, olen); |
4cecaab8 | 5534 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 5535 | |
5f5c8ee5 GM |
5536 | /* Compute number of matching chars starting with first non-blank. */ |
5537 | begmatch = count_match (obody + osp, obody + olen, | |
5538 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
5539 | |
5540 | /* Spaces in new match implicit space past the end of old. */ | |
5541 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 5542 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
5543 | { |
5544 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
5545 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
5546 | ++begmatch; | |
4588ec20 JB |
5547 | } |
5548 | ||
5549 | /* Avoid doing insert/delete char | |
5550 | just cause number of leading spaces differs | |
5f5c8ee5 | 5551 | when the following text does not match. */ |
4588ec20 JB |
5552 | if (begmatch == 0 && osp != nsp) |
5553 | osp = nsp = min (osp, nsp); | |
5554 | ||
5555 | /* Find matching characters at end of line */ | |
5556 | op1 = obody + olen; | |
5557 | np1 = nbody + nlen; | |
5558 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
5559 | while (op1 > op2 |
5560 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
5561 | { |
5562 | op1--; | |
5563 | np1--; | |
5564 | } | |
5565 | endmatch = obody + olen - op1; | |
5566 | ||
4588ec20 JB |
5567 | /* tem gets the distance to insert or delete. |
5568 | endmatch is how many characters we save by doing so. | |
5569 | Is it worth it? */ | |
5570 | ||
5571 | tem = (nlen - nsp) - (olen - osp); | |
5572 | if (endmatch && tem | |
28d440ab | 5573 | && (!TTY_CHAR_INS_DEL_OK (FRAME_TTY (f)) |
8a56675d | 5574 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
5575 | endmatch = 0; |
5576 | ||
5577 | /* nsp - osp is the distance to insert or delete. | |
5578 | If that is nonzero, begmatch is known to be nonzero also. | |
5579 | begmatch + endmatch is how much we save by doing the ins/del. | |
5580 | Is it worth it? */ | |
5581 | ||
5582 | if (nsp != osp | |
28d440ab | 5583 | && (!TTY_CHAR_INS_DEL_OK (FRAME_TTY (f)) |
c363a1d6 | 5584 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
5585 | { |
5586 | begmatch = 0; | |
5587 | endmatch = 0; | |
5588 | osp = nsp = min (osp, nsp); | |
5589 | } | |
5590 | ||
5591 | /* Now go through the line, inserting, writing and | |
5592 | deleting as appropriate. */ | |
5593 | ||
5594 | if (osp > nsp) | |
5595 | { | |
5596 | cursor_to (vpos, nsp); | |
5597 | delete_glyphs (osp - nsp); | |
5598 | } | |
5599 | else if (nsp > osp) | |
5600 | { | |
5601 | /* If going to delete chars later in line | |
5602 | and insert earlier in the line, | |
5603 | must delete first to avoid losing data in the insert */ | |
5604 | if (endmatch && nlen < olen + nsp - osp) | |
5605 | { | |
5606 | cursor_to (vpos, nlen - endmatch + osp - nsp); | |
5607 | delete_glyphs (olen + nsp - osp - nlen); | |
5608 | olen = nlen - (nsp - osp); | |
5609 | } | |
5610 | cursor_to (vpos, osp); | |
5f5c8ee5 | 5611 | insert_glyphs (0, nsp - osp); |
4588ec20 JB |
5612 | } |
5613 | olen += nsp - osp; | |
5614 | ||
5615 | tem = nsp + begmatch + endmatch; | |
5616 | if (nlen != tem || olen != tem) | |
5617 | { | |
4588ec20 JB |
5618 | if (!endmatch || nlen == olen) |
5619 | { | |
c363a1d6 GM |
5620 | /* If new text being written reaches right margin, there is |
5621 | no need to do clear-to-eol at the end of this function | |
5622 | (and it would not be safe, since cursor is not going to | |
5623 | be "at the margin" after the text is done). */ | |
7df02016 | 5624 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 5625 | olen = 0; |
c363a1d6 GM |
5626 | |
5627 | /* Function write_glyphs is prepared to do nothing | |
5628 | if passed a length <= 0. Check it here to avoid | |
5629 | unnecessary cursor movement. */ | |
5630 | if (nlen - tem > 0) | |
5631 | { | |
5632 | cursor_to (vpos, nsp + begmatch); | |
5633 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
5634 | } | |
4588ec20 JB |
5635 | } |
5636 | else if (nlen > olen) | |
5637 | { | |
24e86043 KH |
5638 | /* Here, we used to have the following simple code: |
5639 | ---------------------------------------- | |
5640 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
5641 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
5642 | ---------------------------------------- | |
5643 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
5644 | is a padding glyph. */ | |
5645 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
5646 | int del; | |
5f5c8ee5 | 5647 | |
c363a1d6 | 5648 | cursor_to (vpos, nsp + begmatch); |
177c0ea7 | 5649 | |
5f5c8ee5 | 5650 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
5651 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
5652 | out--; | |
5f5c8ee5 | 5653 | write_glyphs (nbody + nsp + begmatch, out); |
177c0ea7 | 5654 | |
5f5c8ee5 GM |
5655 | /* If we left columns to be overwritten, we must delete them. */ |
5656 | del = olen - tem - out; | |
c363a1d6 GM |
5657 | if (del > 0) |
5658 | delete_glyphs (del); | |
177c0ea7 | 5659 | |
5f5c8ee5 GM |
5660 | /* At last, we insert columns not yet written out. */ |
5661 | insert_glyphs (nbody + nsp + begmatch + out, nlen - olen + del); | |
5662 | olen = nlen; | |
5663 | } | |
5664 | else if (olen > nlen) | |
5665 | { | |
c363a1d6 | 5666 | cursor_to (vpos, nsp + begmatch); |
5f5c8ee5 GM |
5667 | write_glyphs (nbody + nsp + begmatch, nlen - tem); |
5668 | delete_glyphs (olen - nlen); | |
5669 | olen = nlen; | |
5670 | } | |
bd9e3e75 | 5671 | } |
5f5c8ee5 GM |
5672 | |
5673 | just_erase: | |
5674 | /* If any unerased characters remain after the new line, erase them. */ | |
5675 | if (olen > nlen) | |
078b3696 | 5676 | { |
5f5c8ee5 GM |
5677 | cursor_to (vpos, nlen); |
5678 | clear_end_of_line (olen); | |
078b3696 | 5679 | } |
5f5c8ee5 GM |
5680 | |
5681 | /* Exchange contents between current_frame and new_frame. */ | |
5682 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5683 | } |
5f5c8ee5 GM |
5684 | |
5685 | ||
078b3696 | 5686 | \f |
5f5c8ee5 GM |
5687 | /*********************************************************************** |
5688 | X/Y Position -> Buffer Position | |
5689 | ***********************************************************************/ | |
5690 | ||
a1b0a6db GM |
5691 | /* Determine what's under window-relative pixel position (*X, *Y). |
5692 | Return in *OBJECT the object (string or buffer) that's there. | |
5693 | Return in *POS the position in that object. Adjust *X and *Y | |
ba922d0c | 5694 | to character positions. */ |
5f5c8ee5 | 5695 | |
a1b0a6db | 5696 | void |
2d4aac37 | 5697 | buffer_posn_from_coords (w, x, y, dx, dy, object, pos) |
5f5c8ee5 GM |
5698 | struct window *w; |
5699 | int *x, *y; | |
2d4aac37 | 5700 | int *dx, *dy; |
a1b0a6db GM |
5701 | Lisp_Object *object; |
5702 | struct display_pos *pos; | |
4588ec20 | 5703 | { |
5f5c8ee5 GM |
5704 | struct it it; |
5705 | struct buffer *old_current_buffer = current_buffer; | |
5706 | struct text_pos startp; | |
ba922d0c | 5707 | struct glyph_row *row; |
2d4aac37 | 5708 | struct image *img; |
ba922d0c | 5709 | int x0, x1; |
5f5c8ee5 GM |
5710 | |
5711 | current_buffer = XBUFFER (w->buffer); | |
5712 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
5713 | CHARPOS (startp) = min (ZV, max (BEGV, CHARPOS (startp))); | |
5714 | BYTEPOS (startp) = min (ZV_BYTE, max (BEGV_BYTE, BYTEPOS (startp))); | |
5715 | start_display (&it, w, startp); | |
177c0ea7 | 5716 | |
ba922d0c KS |
5717 | x0 = *x - WINDOW_LEFT_MARGIN_WIDTH (w); |
5718 | move_it_to (&it, -1, x0 + it.first_visible_x, *y, -1, | |
5f5c8ee5 | 5719 | MOVE_TO_X | MOVE_TO_Y); |
177c0ea7 | 5720 | |
ba922d0c KS |
5721 | /* Add extra (default width) columns if clicked after EOL. */ |
5722 | x1 = max(0, it.current_x + it.pixel_width - it.first_visible_x); | |
5723 | if (x0 > x1) | |
5724 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5725 | ||
5f5c8ee5 | 5726 | current_buffer = old_current_buffer; |
a1b0a6db | 5727 | |
2d4aac37 KS |
5728 | *dx = x0 + it.first_visible_x - it.current_x; |
5729 | *dy = *y - it.current_y; | |
5730 | ||
019b1f0e | 5731 | #ifdef HAVE_WINDOW_SYSTEM |
2d4aac37 KS |
5732 | if (it.what == IT_IMAGE |
5733 | && (img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL | |
5734 | && !NILP (img->spec)) | |
5735 | *object = img->spec; | |
5736 | else | |
019b1f0e | 5737 | #endif |
2d4aac37 | 5738 | *object = STRINGP (it.string) ? it.string : w->buffer; |
a1b0a6db | 5739 | *pos = it.current; |
ba922d0c KS |
5740 | *x = it.hpos; |
5741 | *y = it.vpos; | |
5f5c8ee5 | 5742 | } |
4588ec20 | 5743 | |
5f5c8ee5 GM |
5744 | |
5745 | /* Value is the string under window-relative coordinates X/Y in the | |
153a073c | 5746 | mode or header line of window W, or nil if none. MODE_LINE_P non-zero |
5f5c8ee5 GM |
5747 | means look at the mode line. *CHARPOS is set to the position in |
5748 | the string returned. */ | |
5749 | ||
5750 | Lisp_Object | |
2d4aac37 | 5751 | mode_line_string (w, x, y, dx, dy, part, charpos) |
5f5c8ee5 | 5752 | struct window *w; |
ba922d0c | 5753 | int *x, *y; |
2d4aac37 | 5754 | int *dx, *dy; |
641bdbf3 | 5755 | enum window_part part; |
5f5c8ee5 GM |
5756 | int *charpos; |
5757 | { | |
5758 | struct glyph_row *row; | |
5759 | struct glyph *glyph, *end; | |
2d4aac37 | 5760 | int x0, y0; |
5f5c8ee5 GM |
5761 | Lisp_Object string = Qnil; |
5762 | ||
641bdbf3 | 5763 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
5764 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
5765 | else | |
045dee35 | 5766 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
2d4aac37 | 5767 | y0 = *y - row->y; |
ba922d0c KS |
5768 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); |
5769 | ||
5f5c8ee5 | 5770 | if (row->mode_line_p && row->enabled_p) |
4588ec20 | 5771 | { |
5f5c8ee5 GM |
5772 | /* Find the glyph under X. If we find one with a string object, |
5773 | it's the one we were looking for. */ | |
5774 | glyph = row->glyphs[TEXT_AREA]; | |
5775 | end = glyph + row->used[TEXT_AREA]; | |
ba922d0c KS |
5776 | for (x0 = *x; glyph < end && x0 > glyph->pixel_width; ++glyph) |
5777 | x0 -= glyph->pixel_width; | |
5778 | *x = glyph - row->glyphs[TEXT_AREA]; | |
5779 | if (glyph < end) | |
5780 | { | |
5781 | string = glyph->object; | |
5782 | *charpos = glyph->charpos; | |
5783 | } | |
5784 | else | |
5785 | /* Add extra (default width) columns if clicked after EOL. */ | |
5786 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
4588ec20 | 5787 | } |
ba922d0c | 5788 | else |
2d4aac37 KS |
5789 | { |
5790 | *x = 0; | |
5791 | x0 = 0; | |
5792 | } | |
5793 | ||
5794 | if (dx) | |
5795 | { | |
5796 | *dx = x0; | |
5797 | *dy = y0; | |
5798 | } | |
5f5c8ee5 GM |
5799 | |
5800 | return string; | |
4588ec20 | 5801 | } |
5f5c8ee5 GM |
5802 | |
5803 | ||
db1db309 GM |
5804 | /* Value is the string under window-relative coordinates X/Y in either |
5805 | marginal area, or nil if none. *CHARPOS is set to the position in | |
5806 | the string returned. */ | |
5807 | ||
5808 | Lisp_Object | |
2d4aac37 | 5809 | marginal_area_string (w, x, y, dx, dy, part, charpos) |
db1db309 | 5810 | struct window *w; |
ba922d0c | 5811 | int *x, *y; |
2d4aac37 | 5812 | int *dx, *dy; |
641bdbf3 | 5813 | enum window_part part; |
521069b9 | 5814 | int *charpos; |
db1db309 GM |
5815 | { |
5816 | struct glyph_row *row = w->current_matrix->rows; | |
5817 | struct glyph *glyph, *end; | |
2d4aac37 | 5818 | int x0, y0, i, wy = *y; |
641bdbf3 | 5819 | int area; |
db1db309 GM |
5820 | Lisp_Object string = Qnil; |
5821 | ||
641bdbf3 | 5822 | if (part == ON_LEFT_MARGIN) |
db1db309 | 5823 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 5824 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
5825 | area = RIGHT_MARGIN_AREA; |
5826 | else | |
5827 | abort (); | |
5828 | ||
5829 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
5830 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
5831 | break; | |
2d4aac37 | 5832 | y0 = *y - row->y; |
ba922d0c | 5833 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); |
db1db309 GM |
5834 | |
5835 | if (row->enabled_p) | |
5836 | { | |
5837 | /* Find the glyph under X. If we find one with a string object, | |
5838 | it's the one we were looking for. */ | |
db1db309 | 5839 | if (area == RIGHT_MARGIN_AREA) |
7df02016 KS |
5840 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
5841 | ? WINDOW_LEFT_FRINGE_WIDTH (w) | |
5842 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) | |
5843 | + window_box_width (w, LEFT_MARGIN_AREA) | |
5844 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 5845 | else |
7df02016 KS |
5846 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
5847 | ? WINDOW_LEFT_FRINGE_WIDTH (w) | |
5848 | : 0); | |
5849 | ||
ba922d0c KS |
5850 | glyph = row->glyphs[area]; |
5851 | end = glyph + row->used[area]; | |
5852 | for (x0 = *x - x0; glyph < end && x0 > glyph->pixel_width; ++glyph) | |
5853 | x0 -= glyph->pixel_width; | |
5854 | *x = glyph - row->glyphs[area]; | |
5855 | if (glyph < end) | |
5856 | { | |
5857 | string = glyph->object; | |
5858 | *charpos = glyph->charpos; | |
5859 | } | |
5860 | else | |
5861 | /* Add extra (default width) columns if clicked after EOL. */ | |
5862 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
db1db309 | 5863 | } |
ba922d0c | 5864 | else |
2d4aac37 KS |
5865 | { |
5866 | x0 = 0; | |
5867 | *x = 0; | |
5868 | } | |
5869 | ||
5870 | if (dx) | |
5871 | { | |
5872 | *dx = x0; | |
5873 | *dy = y0; | |
5874 | } | |
db1db309 GM |
5875 | |
5876 | return string; | |
5877 | } | |
5878 | ||
5879 | ||
5f5c8ee5 GM |
5880 | /*********************************************************************** |
5881 | Changing Frame Sizes | |
5882 | ***********************************************************************/ | |
4588ec20 JB |
5883 | |
5884 | #ifdef SIGWINCH | |
5f5c8ee5 | 5885 | |
efb859b4 | 5886 | SIGTYPE |
61cbef47 | 5887 | window_change_signal (signalnum) /* If we don't have an argument, */ |
5f5c8ee5 | 5888 | int signalnum; /* some compilers complain in signal calls. */ |
4588ec20 JB |
5889 | { |
5890 | int width, height; | |
d43721a2 | 5891 | #ifndef USE_CRT_DLL |
4588ec20 | 5892 | extern int errno; |
d43721a2 | 5893 | #endif |
4588ec20 JB |
5894 | int old_errno = errno; |
5895 | ||
502b9b64 | 5896 | get_frame_size (&width, &height); |
4588ec20 | 5897 | |
502b9b64 JB |
5898 | /* The frame size change obviously applies to a termcap-controlled |
5899 | frame. Find such a frame in the list, and assume it's the only | |
4588ec20 | 5900 | one (since the redisplay code always writes to stdout, not a |
502b9b64 | 5901 | FILE * specified in the frame structure). Record the new size, |
4588ec20 JB |
5902 | but don't reallocate the data structures now. Let that be done |
5903 | later outside of the signal handler. */ | |
5904 | ||
5905 | { | |
35f56f96 | 5906 | Lisp_Object tail, frame; |
4588ec20 | 5907 | |
35f56f96 | 5908 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5909 | { |
35f56f96 | 5910 | if (FRAME_TERMCAP_P (XFRAME (frame))) |
4588ec20 | 5911 | { |
b96fd3e8 | 5912 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); |
4588ec20 JB |
5913 | break; |
5914 | } | |
5915 | } | |
5916 | } | |
5917 | ||
5918 | signal (SIGWINCH, window_change_signal); | |
5919 | errno = old_errno; | |
5920 | } | |
5921 | #endif /* SIGWINCH */ | |
5922 | ||
5923 | ||
b96fd3e8 GM |
5924 | /* Do any change in frame size that was requested by a signal. SAFE |
5925 | non-zero means this function is called from a place where it is | |
5926 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 5927 | |
dfcf069d | 5928 | void |
b96fd3e8 GM |
5929 | do_pending_window_change (safe) |
5930 | int safe; | |
4588ec20 JB |
5931 | { |
5932 | /* If window_change_signal should have run before, run it now. */ | |
b96fd3e8 GM |
5933 | if (redisplaying_p && !safe) |
5934 | return; | |
177c0ea7 | 5935 | |
4588ec20 JB |
5936 | while (delayed_size_change) |
5937 | { | |
35f56f96 | 5938 | Lisp_Object tail, frame; |
4588ec20 JB |
5939 | |
5940 | delayed_size_change = 0; | |
5941 | ||
35f56f96 | 5942 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5943 | { |
5f5c8ee5 | 5944 | struct frame *f = XFRAME (frame); |
35f56f96 | 5945 | |
7df02016 KS |
5946 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
5947 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
5948 | 0, 0, safe); | |
4588ec20 JB |
5949 | } |
5950 | } | |
5951 | } | |
5952 | ||
5953 | ||
502b9b64 | 5954 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 5955 | indicate no change is to take place. |
4588ec20 | 5956 | |
b6a65ac2 JB |
5957 | If DELAY is non-zero, then assume we're being called from a signal |
5958 | handler, and queue the change for later - perhaps the next | |
5959 | redisplay. Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
5960 | from a signal handler. |
5961 | ||
5962 | SAFE non-zero means this function is called from a place where it's | |
5963 | safe to change frame sizes while a redisplay is in progress. */ | |
b6a65ac2 | 5964 | |
dfcf069d | 5965 | void |
b96fd3e8 | 5966 | change_frame_size (f, newheight, newwidth, pretend, delay, safe) |
5f5c8ee5 | 5967 | register struct frame *f; |
b96fd3e8 | 5968 | int newheight, newwidth, pretend, delay, safe; |
45140e01 RS |
5969 | { |
5970 | Lisp_Object tail, frame; | |
3826ea1a | 5971 | |
8a376b3b | 5972 | if (! FRAME_WINDOW_P (f)) |
45140e01 | 5973 | { |
93e54836 RS |
5974 | /* When using termcap, or on MS-DOS, all frames use |
5975 | the same screen, so a change in size affects all frames. */ | |
45140e01 | 5976 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 5977 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 5978 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 5979 | pretend, delay, safe); |
45140e01 RS |
5980 | } |
5981 | else | |
b96fd3e8 | 5982 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
5983 | } |
5984 | ||
5985 | static void | |
b96fd3e8 | 5986 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe) |
5f5c8ee5 | 5987 | register struct frame *f; |
b96fd3e8 | 5988 | int newheight, newwidth, pretend, delay, safe; |
4588ec20 | 5989 | { |
7df02016 | 5990 | int new_frame_total_cols; |
aed13378 | 5991 | int count = SPECPDL_INDEX (); |
3826ea1a | 5992 | |
4588ec20 | 5993 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 5994 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 5995 | { |
7df02016 KS |
5996 | f->new_text_lines = newheight; |
5997 | f->new_text_cols = newwidth; | |
4588ec20 JB |
5998 | delayed_size_change = 1; |
5999 | return; | |
6000 | } | |
6001 | ||
502b9b64 | 6002 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
6003 | f->new_text_lines = 0; |
6004 | f->new_text_cols = 0; | |
b6a65ac2 | 6005 | |
08f7aa3e | 6006 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 6007 | if (newheight == 0) |
7df02016 | 6008 | newheight = FRAME_LINES (f); |
ae19c6f2 | 6009 | if (newwidth == 0) |
7df02016 | 6010 | newwidth = FRAME_COLS (f); |
3826ea1a | 6011 | |
5f5c8ee5 GM |
6012 | /* Compute width of windows in F. |
6013 | This is the width of the frame without vertical scroll bars. */ | |
7df02016 | 6014 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); |
3826ea1a | 6015 | |
b6a65ac2 | 6016 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 6017 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 JB |
6018 | |
6019 | /* If we're not changing the frame size, quit now. */ | |
7df02016 KS |
6020 | if (newheight == FRAME_LINES (f) |
6021 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) | |
4588ec20 JB |
6022 | return; |
6023 | ||
cbb95688 RS |
6024 | BLOCK_INPUT; |
6025 | ||
886a8a6c KH |
6026 | #ifdef MSDOS |
6027 | /* We only can set screen dimensions to certain values supported | |
6028 | by our video hardware. Try to find the smallest size greater | |
6029 | or equal to the requested dimensions. */ | |
6030 | dos_set_window_size (&newheight, &newwidth); | |
6031 | #endif | |
6032 | ||
7df02016 | 6033 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 6034 | { |
5f5c8ee5 | 6035 | if (FRAME_HAS_MINIBUF_P (f) && !FRAME_MINIBUF_ONLY_P (f)) |
4588ec20 | 6036 | { |
5f5c8ee5 | 6037 | /* Frame has both root and mini-buffer. */ |
7df02016 | 6038 | XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f))->top_line, |
5f5c8ee5 GM |
6039 | FRAME_TOP_MARGIN (f)); |
6040 | set_window_height (FRAME_ROOT_WINDOW (f), | |
6041 | (newheight | |
6042 | - 1 | |
6043 | - FRAME_TOP_MARGIN (f)), | |
6044 | 0); | |
7df02016 | 6045 | XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top_line, |
a5d8b611 | 6046 | newheight - 1); |
5f5c8ee5 | 6047 | set_window_height (FRAME_MINIBUF_WINDOW (f), 1, 0); |
4588ec20 JB |
6048 | } |
6049 | else | |
502b9b64 | 6050 | /* Frame has just one top-level window. */ |
5f5c8ee5 GM |
6051 | set_window_height (FRAME_ROOT_WINDOW (f), |
6052 | newheight - FRAME_TOP_MARGIN (f), 0); | |
b6a65ac2 | 6053 | |
5f5c8ee5 | 6054 | if (FRAME_TERMCAP_P (f) && !pretend) |
b6a65ac2 | 6055 | FrameRows = newheight; |
4588ec20 JB |
6056 | } |
6057 | ||
7df02016 | 6058 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 6059 | { |
7df02016 | 6060 | set_window_width (FRAME_ROOT_WINDOW (f), new_frame_total_cols, 0); |
5f5c8ee5 | 6061 | if (FRAME_HAS_MINIBUF_P (f)) |
7df02016 | 6062 | set_window_width (FRAME_MINIBUF_WINDOW (f), new_frame_total_cols, 0); |
4588ec20 | 6063 | |
5f5c8ee5 | 6064 | if (FRAME_TERMCAP_P (f) && !pretend) |
502b9b64 | 6065 | FrameCols = newwidth; |
5f5c8ee5 | 6066 | |
9ea173e8 | 6067 | if (WINDOWP (f->tool_bar_window)) |
7df02016 | 6068 | XSETFASTINT (XWINDOW (f->tool_bar_window)->total_cols, newwidth); |
4588ec20 JB |
6069 | } |
6070 | ||
7df02016 KS |
6071 | FRAME_LINES (f) = newheight; |
6072 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 6073 | |
5f5c8ee5 GM |
6074 | { |
6075 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
6076 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 6077 | |
5f5c8ee5 GM |
6078 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
6079 | &text_area_height); | |
6080 | if (w->cursor.x >= text_area_x + text_area_width) | |
6081 | w->cursor.hpos = w->cursor.x = 0; | |
6082 | if (w->cursor.y >= text_area_y + text_area_height) | |
6083 | w->cursor.vpos = w->cursor.y = 0; | |
6084 | } | |
986e61b8 | 6085 | |
5f5c8ee5 | 6086 | adjust_glyphs (f); |
5f5c8ee5 | 6087 | calculate_costs (f); |
cb02fa39 GM |
6088 | SET_FRAME_GARBAGED (f); |
6089 | f->resized_p = 1; | |
97cf50e7 RS |
6090 | |
6091 | UNBLOCK_INPUT; | |
61730a69 | 6092 | |
e523f7e5 RS |
6093 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); |
6094 | ||
61730a69 | 6095 | /* This isn't quite a no-op: it runs window-configuration-change-hook. */ |
5f5c8ee5 | 6096 | Fset_window_buffer (FRAME_SELECTED_WINDOW (f), |
7df02016 | 6097 | XWINDOW (FRAME_SELECTED_WINDOW (f))->buffer, Qt); |
e523f7e5 RS |
6098 | |
6099 | unbind_to (count, Qnil); | |
4588ec20 | 6100 | } |
5f5c8ee5 GM |
6101 | |
6102 | ||
4588ec20 | 6103 | \f |
5f5c8ee5 GM |
6104 | /*********************************************************************** |
6105 | Terminal Related Lisp Functions | |
6106 | ***********************************************************************/ | |
6107 | ||
6108 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 6109 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
6110 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
6111 | FILE = nil means just close any termscript file currently open. */) | |
6112 | (file) | |
5f5c8ee5 GM |
6113 | Lisp_Object file; |
6114 | { | |
28d440ab KL |
6115 | if (TTY_TERMSCRIPT (CURTTY ()) != 0) |
6116 | fclose (TTY_TERMSCRIPT (CURTTY ())); | |
6117 | TTY_TERMSCRIPT (CURTTY ()) = 0; | |
5f5c8ee5 GM |
6118 | |
6119 | if (! NILP (file)) | |
6120 | { | |
6121 | file = Fexpand_file_name (file, Qnil); | |
28d440ab KL |
6122 | TTY_TERMSCRIPT (CURTTY ()) = fopen (SDATA (file), "w"); |
6123 | if (TTY_TERMSCRIPT (CURTTY ()) == 0) | |
5f5c8ee5 GM |
6124 | report_file_error ("Opening termscript", Fcons (file, Qnil)); |
6125 | } | |
6126 | return Qnil; | |
6127 | } | |
6128 | ||
6129 | ||
4588ec20 | 6130 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
228299fa | 6131 | Ssend_string_to_terminal, 1, 1, 0, |
7ee72033 MB |
6132 | doc: /* Send STRING to the terminal without alteration. |
6133 | Control characters in STRING will have terminal-dependent effects. */) | |
6134 | (string) | |
e912ba09 | 6135 | Lisp_Object string; |
4588ec20 | 6136 | { |
94f3db62 | 6137 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 6138 | CHECK_STRING (string); |
28d440ab | 6139 | if (TTY_TERMSCRIPT (CURTTY ())) |
4588ec20 | 6140 | { |
d5db4077 | 6141 | fwrite (SDATA (string), 1, SBYTES (string), |
28d440ab KL |
6142 | TTY_TERMSCRIPT (CURTTY ())); |
6143 | fflush (TTY_TERMSCRIPT (CURTTY ())); | |
4588ec20 | 6144 | } |
28d440ab KL |
6145 | fwrite (SDATA (string), 1, SBYTES (string), |
6146 | TTY_OUTPUT (CURTTY ())); | |
6147 | fflush (TTY_OUTPUT (CURTTY ())); | |
4588ec20 JB |
6148 | return Qnil; |
6149 | } | |
6150 | ||
5f5c8ee5 | 6151 | |
4588ec20 | 6152 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 6153 | doc: /* Beep, or flash the screen. |
228299fa | 6154 | Also, unless an argument is given, |
7ee72033 MB |
6155 | terminate any keyboard macro currently executing. */) |
6156 | (arg) | |
4588ec20 JB |
6157 | Lisp_Object arg; |
6158 | { | |
efb859b4 | 6159 | if (!NILP (arg)) |
4588ec20 | 6160 | { |
7fa788da RS |
6161 | if (noninteractive) |
6162 | putchar (07); | |
6163 | else | |
6164 | ring_bell (); | |
4588ec20 JB |
6165 | fflush (stdout); |
6166 | } | |
6167 | else | |
6168 | bitch_at_user (); | |
6169 | ||
6170 | return Qnil; | |
6171 | } | |
6172 | ||
dfcf069d | 6173 | void |
4588ec20 JB |
6174 | bitch_at_user () |
6175 | { | |
6176 | if (noninteractive) | |
6177 | putchar (07); | |
5f5c8ee5 | 6178 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
4588ec20 JB |
6179 | error ("Keyboard macro terminated by a command ringing the bell"); |
6180 | else | |
6181 | ring_bell (); | |
6182 | fflush (stdout); | |
6183 | } | |
6184 | ||
5f5c8ee5 GM |
6185 | |
6186 | \f | |
6187 | /*********************************************************************** | |
6188 | Sleeping, Waiting | |
6189 | ***********************************************************************/ | |
6190 | ||
4588ec20 | 6191 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 6192 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
6193 | SECONDS may be a floating-point value, meaning that you can wait for a |
6194 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
6195 | additional wait period, in milliseconds; this may be useful if your | |
6196 | Emacs was built without floating point support. | |
7ee72033 MB |
6197 | \(Not all operating systems support waiting for a fraction of a second.) */) |
6198 | (seconds, milliseconds) | |
767229f8 | 6199 | Lisp_Object seconds, milliseconds; |
4588ec20 | 6200 | { |
767229f8 | 6201 | int sec, usec; |
4588ec20 | 6202 | |
767229f8 | 6203 | if (NILP (milliseconds)) |
e9c9a718 | 6204 | XSETINT (milliseconds, 0); |
767229f8 | 6205 | else |
b7826503 | 6206 | CHECK_NUMBER (milliseconds); |
b07646f5 JB |
6207 | usec = XINT (milliseconds) * 1000; |
6208 | ||
b07646f5 JB |
6209 | { |
6210 | double duration = extract_float (seconds); | |
6211 | sec = (int) duration; | |
6212 | usec += (duration - sec) * 1000000; | |
6213 | } | |
4588ec20 | 6214 | |
a41f8bed | 6215 | #ifndef EMACS_HAS_USECS |
767229f8 JB |
6216 | if (sec == 0 && usec != 0) |
6217 | error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); | |
4588ec20 | 6218 | #endif |
767229f8 JB |
6219 | |
6220 | /* Assure that 0 <= usec < 1000000. */ | |
6221 | if (usec < 0) | |
6222 | { | |
153a073c | 6223 | /* We can't rely on the rounding being correct if usec is negative. */ |
767229f8 JB |
6224 | if (-1000000 < usec) |
6225 | sec--, usec += 1000000; | |
6226 | else | |
6227 | sec -= -usec / 1000000, usec = 1000000 - (-usec % 1000000); | |
4588ec20 | 6228 | } |
767229f8 JB |
6229 | else |
6230 | sec += usec / 1000000, usec %= 1000000; | |
6231 | ||
6b5153b1 | 6232 | if (sec < 0 || (sec == 0 && usec == 0)) |
767229f8 | 6233 | return Qnil; |
4588ec20 | 6234 | |
f76475ad JB |
6235 | { |
6236 | Lisp_Object zero; | |
6237 | ||
a5d8b611 | 6238 | XSETFASTINT (zero, 0); |
f76475ad JB |
6239 | wait_reading_process_input (sec, usec, zero, 0); |
6240 | } | |
d1af74e9 | 6241 | |
767229f8 JB |
6242 | /* We should always have wait_reading_process_input; we have a dummy |
6243 | implementation for systems which don't support subprocesses. */ | |
6244 | #if 0 | |
6245 | /* No wait_reading_process_input */ | |
4588ec20 JB |
6246 | immediate_quit = 1; |
6247 | QUIT; | |
6248 | ||
6249 | #ifdef VMS | |
6250 | sys_sleep (sec); | |
6251 | #else /* not VMS */ | |
177c0ea7 | 6252 | /* The reason this is done this way |
4588ec20 | 6253 | (rather than defined (H_S) && defined (H_T)) |
153a073c | 6254 | is because the VMS preprocessor doesn't grok `defined'. */ |
4588ec20 | 6255 | #ifdef HAVE_SELECT |
a41f8bed JB |
6256 | EMACS_GET_TIME (end_time); |
6257 | EMACS_SET_SECS_USECS (timeout, sec, usec); | |
d1af74e9 | 6258 | EMACS_ADD_TIME (end_time, end_time, timeout); |
177c0ea7 | 6259 | |
4588ec20 JB |
6260 | while (1) |
6261 | { | |
a41f8bed JB |
6262 | EMACS_GET_TIME (timeout); |
6263 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
6264 | if (EMACS_TIME_NEG_P (timeout) | |
6265 | || !select (1, 0, 0, 0, &timeout)) | |
4588ec20 JB |
6266 | break; |
6267 | } | |
4588ec20 JB |
6268 | #else /* not HAVE_SELECT */ |
6269 | sleep (sec); | |
6270 | #endif /* HAVE_SELECT */ | |
6271 | #endif /* not VMS */ | |
177c0ea7 | 6272 | |
4588ec20 JB |
6273 | immediate_quit = 0; |
6274 | #endif /* no subprocesses */ | |
6275 | ||
6276 | return Qnil; | |
6277 | } | |
6278 | ||
5f5c8ee5 | 6279 | |
f76475ad JB |
6280 | /* This is just like wait_reading_process_input, except that |
6281 | it does the redisplay. | |
6282 | ||
ea0d86af | 6283 | It's also much like Fsit_for, except that it can be used for |
836d2cde | 6284 | waiting for input as well. */ |
4588ec20 | 6285 | |
f76475ad | 6286 | Lisp_Object |
ae5a0dd4 RS |
6287 | sit_for (sec, usec, reading, display, initial_display) |
6288 | int sec, usec, reading, display, initial_display; | |
f76475ad JB |
6289 | { |
6290 | Lisp_Object read_kbd; | |
4588ec20 | 6291 | |
ccddf474 RS |
6292 | swallow_events (display); |
6293 | ||
5c749f60 | 6294 | if (detect_input_pending_run_timers (display) || !NILP (Vexecuting_macro)) |
4588ec20 | 6295 | return Qnil; |
4588ec20 | 6296 | |
ae5a0dd4 | 6297 | if (initial_display) |
3007ebfb | 6298 | redisplay_preserve_echo_area (2); |
4588ec20 | 6299 | |
dfdb645c JB |
6300 | if (sec == 0 && usec == 0) |
6301 | return Qt; | |
6302 | ||
4588ec20 | 6303 | #ifdef SIGIO |
8fc798e9 | 6304 | gobble_input (0); |
f76475ad JB |
6305 | #endif |
6306 | ||
e9c9a718 | 6307 | XSETINT (read_kbd, reading ? -1 : 1); |
f76475ad JB |
6308 | wait_reading_process_input (sec, usec, read_kbd, display); |
6309 | ||
4588ec20 JB |
6310 | return detect_input_pending () ? Qnil : Qt; |
6311 | } | |
6312 | ||
5f5c8ee5 | 6313 | |
f76475ad | 6314 | DEFUN ("sit-for", Fsit_for, Ssit_for, 1, 3, 0, |
bacf09b4 | 6315 | doc: /* Perform redisplay, then wait for SECONDS seconds or until input is available. |
228299fa | 6316 | SECONDS may be a floating-point value, meaning that you can wait for a |
659d9874 | 6317 | fraction of a second. |
228299fa | 6318 | \(Not all operating systems support waiting for a fraction of a second.) |
659d9874 | 6319 | Optional arg NODISP non-nil means don't redisplay, just wait for input. |
228299fa GM |
6320 | Redisplay is preempted as always if input arrives, and does not happen |
6321 | if input is available before it starts. | |
659d9874 SM |
6322 | Value is t if waited the full time with no input arriving. |
6323 | ||
6324 | An obsolete but still supported form is | |
6325 | \(sit-for SECONDS &optional MILLISECONDS NODISP) | |
6326 | Where the optional arg MILLISECONDS specifies an additional wait period, | |
6327 | in milliseconds; this was useful when Emacs was built without | |
6328 | floating point support. | |
5435c793 SM |
6329 | usage: (sit-for SECONDS &optional NODISP OLD-NODISP) */) |
6330 | ||
6331 | /* The `old-nodisp' stuff is there so that the arglist has the correct | |
6332 | length. Otherwise, `defdvice' will redefine it with fewer args. */ | |
7ee72033 | 6333 | (seconds, milliseconds, nodisp) |
767229f8 | 6334 | Lisp_Object seconds, milliseconds, nodisp; |
f76475ad | 6335 | { |
767229f8 | 6336 | int sec, usec; |
f76475ad | 6337 | |
659d9874 SM |
6338 | if (NILP (nodisp) && !NUMBERP (milliseconds)) |
6339 | { /* New style. */ | |
6340 | nodisp = milliseconds; | |
6341 | milliseconds = Qnil; | |
6342 | } | |
6343 | ||
767229f8 | 6344 | if (NILP (milliseconds)) |
e9c9a718 | 6345 | XSETINT (milliseconds, 0); |
767229f8 | 6346 | else |
b7826503 | 6347 | CHECK_NUMBER (milliseconds); |
b07646f5 JB |
6348 | usec = XINT (milliseconds) * 1000; |
6349 | ||
b07646f5 JB |
6350 | { |
6351 | double duration = extract_float (seconds); | |
6352 | sec = (int) duration; | |
6353 | usec += (duration - sec) * 1000000; | |
6354 | } | |
f76475ad | 6355 | |
f76475ad | 6356 | #ifndef EMACS_HAS_USECS |
767229f8 JB |
6357 | if (usec != 0 && sec == 0) |
6358 | error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE); | |
f76475ad | 6359 | #endif |
f76475ad | 6360 | |
ae5a0dd4 | 6361 | return sit_for (sec, usec, 0, NILP (nodisp), NILP (nodisp)); |
f76475ad | 6362 | } |
5f5c8ee5 GM |
6363 | |
6364 | ||
6365 | \f | |
6366 | /*********************************************************************** | |
6367 | Other Lisp Functions | |
6368 | ***********************************************************************/ | |
6369 | ||
6370 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
6371 | session's frames, frame names, buffers, buffer-read-only flags, and | |
6372 | buffer-modified-flags, and a trailing sentinel (so we don't need to | |
6373 | add length checks). */ | |
6374 | ||
6375 | static Lisp_Object frame_and_buffer_state; | |
6376 | ||
6377 | ||
6378 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
228299fa | 6379 | Sframe_or_buffer_changed_p, 0, 0, 0, |
bacf09b4 | 6380 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
228299fa GM |
6381 | The state variable is an internal vector containing all frames and buffers, |
6382 | aside from buffers whose names start with space, | |
6383 | along with the buffers' read-only and modified flags, which allows a fast | |
6384 | check to see whether the menu bars might need to be recomputed. | |
6385 | If this function returns non-nil, it updates the internal vector to reflect | |
7ee72033 MB |
6386 | the current state. */) |
6387 | () | |
5f5c8ee5 GM |
6388 | { |
6389 | Lisp_Object tail, frame, buf; | |
6390 | Lisp_Object *vecp; | |
6391 | int n; | |
6392 | ||
6393 | vecp = XVECTOR (frame_and_buffer_state)->contents; | |
6394 | FOR_EACH_FRAME (tail, frame) | |
6395 | { | |
6396 | if (!EQ (*vecp++, frame)) | |
6397 | goto changed; | |
6398 | if (!EQ (*vecp++, XFRAME (frame)->name)) | |
6399 | goto changed; | |
6400 | } | |
6401 | /* Check that the buffer info matches. | |
6402 | No need to test for the end of the vector | |
6403 | because the last element of the vector is lambda | |
6404 | and that will always cause a mismatch. */ | |
7539e11f | 6405 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6406 | { |
7539e11f | 6407 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6408 | /* Ignore buffers that aren't included in buffer lists. */ |
d5db4077 | 6409 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
5f5c8ee5 GM |
6410 | continue; |
6411 | if (!EQ (*vecp++, buf)) | |
6412 | goto changed; | |
6413 | if (!EQ (*vecp++, XBUFFER (buf)->read_only)) | |
6414 | goto changed; | |
6415 | if (!EQ (*vecp++, Fbuffer_modified_p (buf))) | |
6416 | goto changed; | |
6417 | } | |
6418 | /* Detect deletion of a buffer at the end of the list. */ | |
6419 | if (EQ (*vecp, Qlambda)) | |
6420 | return Qnil; | |
6421 | changed: | |
6422 | /* Start with 1 so there is room for at least one lambda at the end. */ | |
6423 | n = 1; | |
6424 | FOR_EACH_FRAME (tail, frame) | |
6425 | n += 2; | |
7539e11f | 6426 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 GM |
6427 | n += 3; |
6428 | /* Reallocate the vector if it's grown, or if it's shrunk a lot. */ | |
6429 | if (n > XVECTOR (frame_and_buffer_state)->size | |
6430 | || n + 20 < XVECTOR (frame_and_buffer_state)->size / 2) | |
6431 | /* Add 20 extra so we grow it less often. */ | |
6432 | frame_and_buffer_state = Fmake_vector (make_number (n + 20), Qlambda); | |
6433 | vecp = XVECTOR (frame_and_buffer_state)->contents; | |
6434 | FOR_EACH_FRAME (tail, frame) | |
6435 | { | |
6436 | *vecp++ = frame; | |
6437 | *vecp++ = XFRAME (frame)->name; | |
6438 | } | |
7539e11f | 6439 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6440 | { |
7539e11f | 6441 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6442 | /* Ignore buffers that aren't included in buffer lists. */ |
d5db4077 | 6443 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
5f5c8ee5 GM |
6444 | continue; |
6445 | *vecp++ = buf; | |
6446 | *vecp++ = XBUFFER (buf)->read_only; | |
6447 | *vecp++ = Fbuffer_modified_p (buf); | |
6448 | } | |
6449 | /* Fill up the vector with lambdas (always at least one). */ | |
6450 | *vecp++ = Qlambda; | |
6451 | while (vecp - XVECTOR (frame_and_buffer_state)->contents | |
6452 | < XVECTOR (frame_and_buffer_state)->size) | |
6453 | *vecp++ = Qlambda; | |
6454 | /* Make sure we didn't overflow the vector. */ | |
6455 | if (vecp - XVECTOR (frame_and_buffer_state)->contents | |
6456 | > XVECTOR (frame_and_buffer_state)->size) | |
6457 | abort (); | |
6458 | return Qt; | |
6459 | } | |
6460 | ||
6461 | ||
4588ec20 | 6462 | \f |
5f5c8ee5 GM |
6463 | /*********************************************************************** |
6464 | Initialization | |
6465 | ***********************************************************************/ | |
6466 | ||
5f5c8ee5 GM |
6467 | /* Initialization done when Emacs fork is started, before doing stty. |
6468 | Determine terminal type and set terminal_driver. Then invoke its | |
6469 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 6470 | |
dfcf069d | 6471 | void |
4588ec20 JB |
6472 | init_display () |
6473 | { | |
28d440ab KL |
6474 | char *terminal_type; |
6475 | ||
4588ec20 JB |
6476 | #ifdef HAVE_X_WINDOWS |
6477 | extern int display_arg; | |
6478 | #endif | |
6479 | ||
5f5c8ee5 GM |
6480 | /* Construct the space glyph. */ |
6481 | space_glyph.type = CHAR_GLYPH; | |
6482 | SET_CHAR_GLYPH_FROM_GLYPH (space_glyph, ' '); | |
6483 | space_glyph.charpos = -1; | |
6484 | ||
4588ec20 JB |
6485 | meta_key = 0; |
6486 | inverse_video = 0; | |
6487 | cursor_in_echo_area = 0; | |
6488 | terminal_type = (char *) 0; | |
6489 | ||
1315c181 JB |
6490 | /* Now is the time to initialize this; it's used by init_sys_modes |
6491 | during startup. */ | |
6492 | Vwindow_system = Qnil; | |
4588ec20 | 6493 | |
1315c181 JB |
6494 | /* If the user wants to use a window system, we shouldn't bother |
6495 | initializing the terminal. This is especially important when the | |
6496 | terminal is so dumb that emacs gives up before and doesn't bother | |
6497 | using the window system. | |
4588ec20 | 6498 | |
36bbad1d KH |
6499 | If the DISPLAY environment variable is set and nonempty, |
6500 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6501 | |
6502 | #ifdef HAVE_X_WINDOWS | |
d460af17 JB |
6503 | if (! display_arg) |
6504 | { | |
36bbad1d | 6505 | char *display; |
d460af17 | 6506 | #ifdef VMS |
36bbad1d | 6507 | display = getenv ("DECW$DISPLAY"); |
d460af17 | 6508 | #else |
36bbad1d | 6509 | display = getenv ("DISPLAY"); |
d460af17 | 6510 | #endif |
36bbad1d KH |
6511 | |
6512 | display_arg = (display != 0 && *display != 0); | |
f040093a | 6513 | } |
d460af17 | 6514 | |
177c0ea7 | 6515 | if (!inhibit_window_system && display_arg |
9e4555e8 RS |
6516 | #ifndef CANNOT_DUMP |
6517 | && initialized | |
6518 | #endif | |
6519 | ) | |
4588ec20 JB |
6520 | { |
6521 | Vwindow_system = intern ("x"); | |
6522 | #ifdef HAVE_X11 | |
6523 | Vwindow_system_version = make_number (11); | |
6524 | #else | |
6525 | Vwindow_system_version = make_number (10); | |
039e5d71 | 6526 | #endif |
8a2a6032 | 6527 | #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES) |
039e5d71 | 6528 | /* In some versions of ncurses, |
6a428f77 | 6529 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6530 | So call tgetent. */ |
6531 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 | 6532 | #endif |
5f5c8ee5 | 6533 | adjust_frame_glyphs_initially (); |
4588ec20 JB |
6534 | return; |
6535 | } | |
6536 | #endif /* HAVE_X_WINDOWS */ | |
6537 | ||
fd2e066a | 6538 | #ifdef HAVE_NTGUI |
177c0ea7 | 6539 | if (!inhibit_window_system) |
fd2e066a | 6540 | { |
60c7469c | 6541 | Vwindow_system = intern ("w32"); |
fd2e066a | 6542 | Vwindow_system_version = make_number (1); |
5f5c8ee5 | 6543 | adjust_frame_glyphs_initially (); |
fd2e066a GV |
6544 | return; |
6545 | } | |
6546 | #endif /* HAVE_NTGUI */ | |
6547 | ||
e0f712ba | 6548 | #ifdef MAC_OS |
177c0ea7 | 6549 | if (!inhibit_window_system) |
1a578e9b AC |
6550 | { |
6551 | Vwindow_system = intern ("mac"); | |
6552 | Vwindow_system_version = make_number (1); | |
6553 | adjust_frame_glyphs_initially (); | |
6554 | return; | |
6555 | } | |
e0f712ba | 6556 | #endif /* MAC_OS */ |
1a578e9b | 6557 | |
4588ec20 JB |
6558 | /* If no window system has been specified, try to use the terminal. */ |
6559 | if (! isatty (0)) | |
6560 | { | |
1559a86d | 6561 | fatal ("standard input is not a tty"); |
4588ec20 JB |
6562 | exit (1); |
6563 | } | |
6564 | ||
153a073c | 6565 | /* Look at the TERM variable. */ |
4588ec20 JB |
6566 | terminal_type = (char *) getenv ("TERM"); |
6567 | if (!terminal_type) | |
6568 | { | |
6569 | #ifdef VMS | |
6570 | fprintf (stderr, "Please specify your terminal type.\n\ | |
6571 | For types defined in VMS, use set term /device=TYPE.\n\ | |
6572 | For types not defined in VMS, use define emacs_term \"TYPE\".\n\ | |
6573 | \(The quotation marks are necessary since terminal types are lower case.)\n"); | |
6574 | #else | |
6575 | fprintf (stderr, "Please set the environment variable TERM; see tset(1).\n"); | |
6576 | #endif | |
6577 | exit (1); | |
6578 | } | |
6579 | ||
6580 | #ifdef VMS | |
5f5c8ee5 | 6581 | /* VMS DCL tends to up-case things, so down-case term type. |
4588ec20 JB |
6582 | Hardly any uppercase letters in terminal types; should be none. */ |
6583 | { | |
6584 | char *new = (char *) xmalloc (strlen (terminal_type) + 1); | |
6585 | char *p; | |
6586 | ||
6587 | strcpy (new, terminal_type); | |
6588 | ||
6589 | for (p = new; *p; p++) | |
6590 | if (isupper (*p)) | |
6591 | *p = tolower (*p); | |
6592 | ||
6593 | terminal_type = new; | |
177c0ea7 | 6594 | } |
5f5c8ee5 | 6595 | #endif /* VMS */ |
4588ec20 | 6596 | |
28d440ab | 6597 | term_init (0, terminal_type); |
177c0ea7 | 6598 | |
d86c299a | 6599 | { |
91fb7e1b | 6600 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6601 | int width = FRAME_TOTAL_COLS (sf); |
6602 | int height = FRAME_LINES (sf); | |
d86c299a | 6603 | |
5f5c8ee5 | 6604 | unsigned int total_glyphs = height * (width + 2) * sizeof (struct glyph); |
d86c299a | 6605 | |
5f5c8ee5 GM |
6606 | /* If these sizes are so big they cause overflow, just ignore the |
6607 | change. It's not clear what better we could do. */ | |
6608 | if (total_glyphs / sizeof (struct glyph) / height != width + 2) | |
1559a86d | 6609 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6610 | } |
6611 | ||
5f5c8ee5 | 6612 | adjust_frame_glyphs_initially (); |
91fb7e1b | 6613 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6614 | |
4588ec20 JB |
6615 | #ifdef SIGWINCH |
6616 | #ifndef CANNOT_DUMP | |
6617 | if (initialized) | |
6618 | #endif /* CANNOT_DUMP */ | |
6619 | signal (SIGWINCH, window_change_signal); | |
6620 | #endif /* SIGWINCH */ | |
5f5c8ee5 GM |
6621 | |
6622 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ | |
6623 | if (initialized | |
6624 | && !noninteractive | |
622dca89 EZ |
6625 | #ifdef MSDOS |
6626 | /* The MSDOS terminal turns on its ``window system'' relatively | |
6627 | late into the startup, so we cannot do the frame faces' | |
6628 | initialization just yet. It will be done later by pc-win.el | |
6629 | and internal_terminal_init. */ | |
6630 | && (strcmp (terminal_type, "internal") != 0 || inhibit_window_system) | |
6631 | #endif | |
5f5c8ee5 | 6632 | && NILP (Vwindow_system)) |
2d764c78 EZ |
6633 | { |
6634 | /* For the initial frame, we don't have any way of knowing what | |
6635 | are the foreground and background colors of the terminal. */ | |
6636 | struct frame *sf = SELECTED_FRAME(); | |
6637 | ||
f9d2fdc4 EZ |
6638 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
6639 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
6640 | call0 (intern ("tty-set-up-initial-frame-faces")); |
6641 | } | |
5f5c8ee5 GM |
6642 | } |
6643 | ||
6644 | ||
6645 | \f | |
6646 | /*********************************************************************** | |
6647 | Blinking cursor | |
6648 | ***********************************************************************/ | |
6649 | ||
c3f13540 | 6650 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 6651 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 6652 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
6653 | WINDOW nil means use the selected window. SHOW non-nil means |
6654 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 MB |
6655 | don't show a cursor. */) |
6656 | (window, show) | |
5d7791b3 | 6657 | Lisp_Object window, show; |
5f5c8ee5 | 6658 | { |
5f5c8ee5 GM |
6659 | /* Don't change cursor state while redisplaying. This could confuse |
6660 | output routines. */ | |
6661 | if (!redisplaying_p) | |
6662 | { | |
6663 | if (NILP (window)) | |
6664 | window = selected_window; | |
6665 | else | |
b7826503 | 6666 | CHECK_WINDOW (window); |
177c0ea7 | 6667 | |
5d7791b3 | 6668 | XWINDOW (window)->cursor_off_p = NILP (show); |
5f5c8ee5 GM |
6669 | } |
6670 | ||
6671 | return Qnil; | |
4588ec20 | 6672 | } |
5f5c8ee5 GM |
6673 | |
6674 | ||
5d7791b3 GM |
6675 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
6676 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 6677 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 MB |
6678 | WINDOW nil or omitted means report on the selected window. */) |
6679 | (window) | |
5d7791b3 GM |
6680 | Lisp_Object window; |
6681 | { | |
6682 | struct window *w; | |
177c0ea7 | 6683 | |
5d7791b3 GM |
6684 | if (NILP (window)) |
6685 | window = selected_window; | |
6686 | else | |
b7826503 | 6687 | CHECK_WINDOW (window); |
177c0ea7 | 6688 | |
5d7791b3 | 6689 | w = XWINDOW (window); |
177c0ea7 | 6690 | return w->cursor_off_p ? Qnil : Qt; |
5d7791b3 GM |
6691 | } |
6692 | ||
4588ec20 | 6693 | \f |
5f5c8ee5 GM |
6694 | /*********************************************************************** |
6695 | Initialization | |
6696 | ***********************************************************************/ | |
6697 | ||
dfcf069d | 6698 | void |
4588ec20 JB |
6699 | syms_of_display () |
6700 | { | |
502b9b64 | 6701 | defsubr (&Sredraw_frame); |
4588ec20 | 6702 | defsubr (&Sredraw_display); |
078b3696 | 6703 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
6704 | defsubr (&Sopen_termscript); |
6705 | defsubr (&Sding); | |
6706 | defsubr (&Ssit_for); | |
6707 | defsubr (&Ssleep_for); | |
6708 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 6709 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 6710 | defsubr (&Sinternal_show_cursor_p); |
4588ec20 | 6711 | |
2d5912c1 | 6712 | #if GLYPH_DEBUG |
9b0e97aa GM |
6713 | defsubr (&Sdump_redisplay_history); |
6714 | #endif | |
6715 | ||
d1dad759 | 6716 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
6717 | staticpro (&frame_and_buffer_state); |
6718 | ||
9cda4f7c RS |
6719 | Qdisplay_table = intern ("display-table"); |
6720 | staticpro (&Qdisplay_table); | |
e7067d00 GM |
6721 | Qredisplay_dont_pause = intern ("redisplay-dont-pause"); |
6722 | staticpro (&Qredisplay_dont_pause); | |
9cda4f7c | 6723 | |
7ee72033 | 6724 | DEFVAR_INT ("baud-rate", &baud_rate, |
bacf09b4 | 6725 | doc: /* *The output baud rate of the terminal. |
228299fa GM |
6726 | On most systems, changing this value will affect the amount of padding |
6727 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 6728 | |
7ee72033 | 6729 | DEFVAR_BOOL ("inverse-video", &inverse_video, |
bacf09b4 | 6730 | doc: /* *Non-nil means invert the entire frame display. |
228299fa | 6731 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 6732 | |
7ee72033 | 6733 | DEFVAR_BOOL ("visible-bell", &visible_bell, |
bacf09b4 | 6734 | doc: /* *Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
6735 | |
6736 | See also `ring-bell-function'. */); | |
177c0ea7 | 6737 | |
7ee72033 | 6738 | DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter, |
bacf09b4 | 6739 | doc: /* *Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
6740 | A non-nil value is useful if the terminal can automatically preserve |
6741 | Emacs's frame display when you reenter Emacs. | |
6742 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 6743 | |
7ee72033 | 6744 | DEFVAR_LISP ("window-system", &Vwindow_system, |
85565e9e RS |
6745 | doc: /* Name of window system that Emacs is displaying through. |
6746 | The value is a symbol--for instance, `x' for X windows. | |
6747 | The value is nil if Emacs is using a text-only terminal. */); | |
177c0ea7 | 6748 | |
7ee72033 | 6749 | DEFVAR_LISP ("window-system-version", &Vwindow_system_version, |
bacf09b4 | 6750 | doc: /* The version number of the window system in use. |
228299fa | 6751 | For X windows, this is 10 or 11. */); |
177c0ea7 | 6752 | |
7ee72033 | 6753 | DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area, |
bacf09b4 | 6754 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 6755 | |
7ee72033 | 6756 | DEFVAR_LISP ("glyph-table", &Vglyph_table, |
bacf09b4 | 6757 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
6758 | If not nil, this is a vector indexed by glyph code to define the glyph. |
6759 | Each element can be: | |
6760 | integer: a glyph code which this glyph is an alias for. | |
6761 | string: output this glyph using that string (not impl. in X windows). | |
6762 | nil: this glyph mod 524288 is the code of a character to output, | |
6763 | and this glyph / 524288 is the face number (see `face-id') to use | |
6764 | while outputting it. */); | |
4588ec20 JB |
6765 | Vglyph_table = Qnil; |
6766 | ||
7ee72033 | 6767 | DEFVAR_LISP ("standard-display-table", &Vstandard_display_table, |
bacf09b4 | 6768 | doc: /* Display table to use for buffers that specify none. |
228299fa | 6769 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
6770 | Vstandard_display_table = Qnil; |
6771 | ||
7ee72033 | 6772 | DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause, |
bacf09b4 | 6773 | doc: /* *Non-nil means update isn't paused when input is detected. */); |
5f5c8ee5 GM |
6774 | redisplay_dont_pause = 0; |
6775 | ||
4588ec20 JB |
6776 | /* Initialize `window-system', unless init_display already decided it. */ |
6777 | #ifdef CANNOT_DUMP | |
6778 | if (noninteractive) | |
6779 | #endif | |
6780 | { | |
6781 | Vwindow_system = Qnil; | |
6782 | Vwindow_system_version = Qnil; | |
6783 | } | |
6784 | } | |
ab5796a9 MB |
6785 | |
6786 | /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413 | |
6787 | (do not change this comment) */ |