Commit | Line | Data |
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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" |
4588ec20 JB |
32 | #include "termchar.h" |
33 | #include "termopts.h" | |
3be08bea | 34 | #include "termhooks.h" |
a0879520 | 35 | /* cm.h must come after dispextern.h on Windows. */ |
fd2e066a GV |
36 | #include "dispextern.h" |
37 | #include "cm.h" | |
4588ec20 | 38 | #include "buffer.h" |
24e86043 | 39 | #include "charset.h" |
d43721a2 | 40 | #include "keyboard.h" |
502b9b64 | 41 | #include "frame.h" |
4588ec20 JB |
42 | #include "window.h" |
43 | #include "commands.h" | |
44 | #include "disptab.h" | |
45 | #include "indent.h" | |
d169fe39 | 46 | #include "intervals.h" |
97cf50e7 | 47 | #include "blockinput.h" |
dfcf069d | 48 | #include "process.h" |
4588ec20 | 49 | |
24e86043 KH |
50 | /* I don't know why DEC Alpha OSF1 fail to compile this file if we |
51 | include the following file. */ | |
52 | /* #include "systty.h" */ | |
58b2bb63 | 53 | #include "syssignal.h" |
a41f8bed | 54 | |
4588ec20 JB |
55 | #ifdef HAVE_X_WINDOWS |
56 | #include "xterm.h" | |
5f5c8ee5 | 57 | #endif /* HAVE_X_WINDOWS */ |
4588ec20 | 58 | |
fd2e066a GV |
59 | #ifdef HAVE_NTGUI |
60 | #include "w32term.h" | |
61 | #endif /* HAVE_NTGUI */ | |
62 | ||
e0f712ba | 63 | #ifdef MAC_OS |
1a578e9b | 64 | #include "macterm.h" |
e0f712ba | 65 | #endif /* MAC_OS */ |
1a578e9b | 66 | |
5f5c8ee5 | 67 | /* Include systime.h after xterm.h to avoid double inclusion of time.h. */ |
6cbd1643 | 68 | |
5f5c8ee5 | 69 | #include "systime.h" |
3883a901 RS |
70 | #include <errno.h> |
71 | ||
5f5c8ee5 GM |
72 | /* To get the prototype for `sleep'. */ |
73 | ||
74 | #ifdef HAVE_UNISTD_H | |
75 | #include <unistd.h> | |
76 | #endif | |
77 | ||
4588ec20 | 78 | /* Get number of chars of output now in the buffer of a stdio stream. |
5f5c8ee5 GM |
79 | This ought to be built in in stdio, but it isn't. Some s- files |
80 | override this because their stdio internals differ. */ | |
81 | ||
e3271ae5 | 82 | #ifdef __GNU_LIBRARY__ |
5f5c8ee5 GM |
83 | |
84 | /* The s- file might have overridden the definition with one that | |
85 | works for the system's C library. But we are using the GNU C | |
86 | library, so this is the right definition for every system. */ | |
87 | ||
3883a901 RS |
88 | #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT |
89 | #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT | |
90 | #else | |
cb5558ff | 91 | #undef PENDING_OUTPUT_COUNT |
e3271ae5 | 92 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer) |
3883a901 RS |
93 | #endif |
94 | #else /* not __GNU_LIBRARY__ */ | |
68c45bf0 PE |
95 | #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING |
96 | #include <stdio_ext.h> | |
97 | #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE) | |
98 | #endif | |
cb5558ff | 99 | #ifndef PENDING_OUTPUT_COUNT |
4588ec20 JB |
100 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) |
101 | #endif | |
5f5c8ee5 GM |
102 | #endif /* not __GNU_LIBRARY__ */ |
103 | ||
8a2a6032 | 104 | #if defined(HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES) |
fa0ec9f4 DL |
105 | #include <term.h> /* for tgetent */ |
106 | #endif | |
5f5c8ee5 GM |
107 | \f |
108 | /* Structure to pass dimensions around. Used for character bounding | |
109 | boxes, glyph matrix dimensions and alike. */ | |
110 | ||
111 | struct dim | |
112 | { | |
113 | int width; | |
114 | int height; | |
115 | }; | |
116 | ||
117 | \f | |
118 | /* Function prototypes. */ | |
119 | ||
bccee4f2 GM |
120 | static struct glyph_matrix *save_current_matrix P_ ((struct frame *)); |
121 | static void restore_current_matrix P_ ((struct frame *, struct glyph_matrix *)); | |
c9f00270 | 122 | static void fake_current_matrices P_ ((Lisp_Object)); |
408f5064 GM |
123 | static void redraw_overlapping_rows P_ ((struct window *, int)); |
124 | static void redraw_overlapped_rows P_ ((struct window *, int)); | |
5f5c8ee5 GM |
125 | static int count_blanks P_ ((struct glyph *, int)); |
126 | static int count_match P_ ((struct glyph *, struct glyph *, | |
127 | struct glyph *, struct glyph *)); | |
128 | static unsigned line_draw_cost P_ ((struct glyph_matrix *, int)); | |
129 | static void update_frame_line P_ ((struct frame *, int)); | |
130 | static struct dim allocate_matrices_for_frame_redisplay | |
5d3cc43c GM |
131 | P_ ((Lisp_Object, int, int, int, int *)); |
132 | static void allocate_matrices_for_window_redisplay P_ ((struct window *)); | |
5f5c8ee5 GM |
133 | static int realloc_glyph_pool P_ ((struct glyph_pool *, struct dim)); |
134 | static void adjust_frame_glyphs P_ ((struct frame *)); | |
135 | struct glyph_matrix *new_glyph_matrix P_ ((struct glyph_pool *)); | |
136 | static void free_glyph_matrix P_ ((struct glyph_matrix *)); | |
137 | static void adjust_glyph_matrix P_ ((struct window *, struct glyph_matrix *, | |
138 | int, int, struct dim)); | |
b96fd3e8 | 139 | static void change_frame_size_1 P_ ((struct frame *, int, int, int, int, int)); |
5f5c8ee5 | 140 | static void swap_glyph_pointers P_ ((struct glyph_row *, struct glyph_row *)); |
f1d2ce7f | 141 | #if GLYPH_DEBUG |
5f5c8ee5 | 142 | static int glyph_row_slice_p P_ ((struct glyph_row *, struct glyph_row *)); |
9339e87f | 143 | #endif |
5f5c8ee5 GM |
144 | static void fill_up_frame_row_with_spaces P_ ((struct glyph_row *, int)); |
145 | static void build_frame_matrix_from_window_tree P_ ((struct glyph_matrix *, | |
146 | struct window *)); | |
147 | static void build_frame_matrix_from_leaf_window P_ ((struct glyph_matrix *, | |
148 | struct window *)); | |
149 | static struct glyph_pool *new_glyph_pool P_ ((void)); | |
150 | static void free_glyph_pool P_ ((struct glyph_pool *)); | |
151 | static void adjust_frame_glyphs_initially P_ ((void)); | |
152 | static void adjust_frame_message_buffer P_ ((struct frame *)); | |
153 | static void adjust_decode_mode_spec_buffer P_ ((struct frame *)); | |
154 | static void fill_up_glyph_row_with_spaces P_ ((struct glyph_row *)); | |
155 | static void build_frame_matrix P_ ((struct frame *)); | |
156 | void clear_current_matrices P_ ((struct frame *)); | |
157 | void scroll_glyph_matrix_range P_ ((struct glyph_matrix *, int, int, | |
158 | int, int)); | |
159 | static void clear_window_matrices P_ ((struct window *, int)); | |
160 | static void fill_up_glyph_row_area_with_spaces P_ ((struct glyph_row *, int)); | |
161 | static int scrolling_window P_ ((struct window *, int)); | |
e876ff42 | 162 | static int update_window_line P_ ((struct window *, int, int *)); |
5f5c8ee5 | 163 | static void update_marginal_area P_ ((struct window *, int, int)); |
408f5064 | 164 | static int update_text_area P_ ((struct window *, int)); |
5f5c8ee5 GM |
165 | static void make_current P_ ((struct glyph_matrix *, struct glyph_matrix *, |
166 | int)); | |
167 | static void mirror_make_current P_ ((struct window *, int)); | |
168 | void check_window_matrix_pointers P_ ((struct window *)); | |
b96fd3e8 | 169 | #if GLYPH_DEBUG |
5f5c8ee5 GM |
170 | static void check_matrix_pointers P_ ((struct glyph_matrix *, |
171 | struct glyph_matrix *)); | |
b96fd3e8 | 172 | #endif |
5f5c8ee5 GM |
173 | static void mirror_line_dance P_ ((struct window *, int, int, int *, char *)); |
174 | static int update_window_tree P_ ((struct window *, int)); | |
175 | static int update_window P_ ((struct window *, int)); | |
176 | static int update_frame_1 P_ ((struct frame *, int, int)); | |
177 | static void set_window_cursor_after_update P_ ((struct window *)); | |
178 | static int row_equal_p P_ ((struct window *, struct glyph_row *, | |
e4e0bee9 | 179 | struct glyph_row *, int)); |
5f5c8ee5 GM |
180 | static void adjust_frame_glyphs_for_window_redisplay P_ ((struct frame *)); |
181 | static void adjust_frame_glyphs_for_frame_redisplay P_ ((struct frame *)); | |
182 | static void reverse_rows P_ ((struct glyph_matrix *, int, int)); | |
183 | static int margin_glyphs_to_reserve P_ ((struct window *, int, Lisp_Object)); | |
a13396c9 GM |
184 | static void sync_window_with_frame_matrix_rows P_ ((struct window *)); |
185 | struct window *frame_row_to_window P_ ((struct window *, int)); | |
5f5c8ee5 | 186 | |
5f5c8ee5 GM |
187 | \f |
188 | /* Non-zero means don't pause redisplay for pending input. (This is | |
189 | for debugging and for a future implementation of EDT-like | |
190 | scrolling. */ | |
4588ec20 | 191 | |
5f5c8ee5 | 192 | int redisplay_dont_pause; |
45140e01 | 193 | |
a41f8bed | 194 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 195 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 196 | |
502b9b64 | 197 | int frame_garbaged; |
4588ec20 | 198 | |
5f5c8ee5 | 199 | /* Nonzero means last display completed. Zero means it was preempted. */ |
4588ec20 JB |
200 | |
201 | int display_completed; | |
202 | ||
5f5c8ee5 GM |
203 | /* Lisp variable visible-bell; enables use of screen-flash instead of |
204 | audible bell. */ | |
4588ec20 JB |
205 | |
206 | int visible_bell; | |
207 | ||
502b9b64 | 208 | /* Invert the color of the whole frame, at a low level. */ |
4588ec20 JB |
209 | |
210 | int inverse_video; | |
211 | ||
212 | /* Line speed of the terminal. */ | |
213 | ||
31ade731 | 214 | EMACS_INT baud_rate; |
4588ec20 | 215 | |
5f5c8ee5 GM |
216 | /* Either nil or a symbol naming the window system under which Emacs |
217 | is running. */ | |
4588ec20 JB |
218 | |
219 | Lisp_Object Vwindow_system; | |
220 | ||
221 | /* Version number of X windows: 10, 11 or nil. */ | |
5f5c8ee5 | 222 | |
4588ec20 JB |
223 | Lisp_Object Vwindow_system_version; |
224 | ||
5f5c8ee5 GM |
225 | /* Vector of glyph definitions. Indexed by glyph number, the contents |
226 | are a string which is how to output the glyph. | |
4588ec20 JB |
227 | |
228 | If Vglyph_table is nil, a glyph is output by using its low 8 bits | |
5f5c8ee5 GM |
229 | as a character code. |
230 | ||
231 | This is an obsolete feature that is no longer used. The variable | |
232 | is retained for compatibility. */ | |
4588ec20 JB |
233 | |
234 | Lisp_Object Vglyph_table; | |
235 | ||
236 | /* Display table to use for vectors that don't specify their own. */ | |
237 | ||
238 | Lisp_Object Vstandard_display_table; | |
239 | ||
5f5c8ee5 | 240 | /* Nonzero means reading single-character input with prompt so put |
153a073c | 241 | cursor on mini-buffer after the prompt. Positive means at end of |
5f5c8ee5 GM |
242 | text in echo area; negative means at beginning of line. */ |
243 | ||
4588ec20 | 244 | int cursor_in_echo_area; |
9cda4f7c | 245 | |
e7067d00 | 246 | Lisp_Object Qdisplay_table, Qredisplay_dont_pause; |
5f5c8ee5 | 247 | |
4588ec20 | 248 | \f |
5f5c8ee5 | 249 | /* The currently selected frame. In a single-frame version, this |
91fb7e1b | 250 | variable always equals the_only_frame. */ |
4588ec20 | 251 | |
91fb7e1b | 252 | Lisp_Object selected_frame; |
4588ec20 | 253 | |
5f5c8ee5 | 254 | /* A frame which is not just a mini-buffer, or 0 if there are no such |
502b9b64 | 255 | frames. This is usually the most recent such frame that was |
87485d6f MW |
256 | selected. In a single-frame version, this variable always holds |
257 | the address of the_only_frame. */ | |
4588ec20 | 258 | |
5f5c8ee5 | 259 | struct frame *last_nonminibuf_frame; |
d52bad65 | 260 | |
5f5c8ee5 | 261 | /* Stdio stream being used for copy of all output. */ |
4588ec20 | 262 | |
5f5c8ee5 | 263 | FILE *termscript; |
502b9b64 | 264 | |
5f5c8ee5 | 265 | /* Structure for info on cursor positioning. */ |
4588ec20 | 266 | |
5f5c8ee5 | 267 | struct cm Wcm; |
4588ec20 | 268 | |
5f5c8ee5 | 269 | /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 270 | |
5f5c8ee5 | 271 | int delayed_size_change; |
4588ec20 | 272 | |
5f5c8ee5 | 273 | /* 1 means glyph initialization has been completed at startup. */ |
4588ec20 | 274 | |
5f5c8ee5 | 275 | static int glyphs_initialized_initially_p; |
4588ec20 | 276 | |
5f5c8ee5 | 277 | /* Updated window if != 0. Set by update_window. */ |
4588ec20 | 278 | |
5f5c8ee5 | 279 | struct window *updated_window; |
4588ec20 | 280 | |
5f5c8ee5 | 281 | /* Glyph row updated in update_window_line, and area that is updated. */ |
4588ec20 | 282 | |
5f5c8ee5 GM |
283 | struct glyph_row *updated_row; |
284 | int updated_area; | |
4588ec20 | 285 | |
5f5c8ee5 | 286 | /* A glyph for a space. */ |
4588ec20 | 287 | |
5f5c8ee5 | 288 | struct glyph space_glyph; |
4588ec20 | 289 | |
5f5c8ee5 GM |
290 | /* Non-zero means update has been performed directly, so that there's |
291 | no need for redisplay_internal to do much work. Set by | |
292 | direct_output_for_insert. */ | |
4588ec20 | 293 | |
5f5c8ee5 | 294 | int redisplay_performed_directly_p; |
4588ec20 | 295 | |
5f5c8ee5 GM |
296 | /* Counts of allocated structures. These counts serve to diagnose |
297 | memory leaks and double frees. */ | |
4588ec20 | 298 | |
5f5c8ee5 GM |
299 | int glyph_matrix_count; |
300 | int glyph_pool_count; | |
4588ec20 | 301 | |
5f5c8ee5 GM |
302 | /* If non-null, the frame whose frame matrices are manipulated. If |
303 | null, window matrices are worked on. */ | |
4588ec20 | 304 | |
5f5c8ee5 | 305 | static struct frame *frame_matrix_frame; |
4588ec20 | 306 | |
5f5c8ee5 GM |
307 | /* Current interface for window-based redisplay. Set from init_xterm. |
308 | A null value means we are not using window-based redisplay. */ | |
4588ec20 | 309 | |
5f5c8ee5 | 310 | struct redisplay_interface *rif; |
4588ec20 | 311 | |
5f5c8ee5 GM |
312 | /* Non-zero means that fonts have been loaded since the last glyph |
313 | matrix adjustments. Redisplay must stop, and glyph matrices must | |
314 | be adjusted when this flag becomes non-zero during display. The | |
315 | reason fonts can be loaded so late is that fonts of fontsets are | |
316 | loaded on demand. */ | |
836d2cde | 317 | |
5f5c8ee5 | 318 | int fonts_changed_p; |
836d2cde | 319 | |
177c0ea7 | 320 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 321 | This may only be used for terminal frames. */ |
836d2cde | 322 | |
5f5c8ee5 | 323 | #if GLYPH_DEBUG |
4588ec20 | 324 | |
5f5c8ee5 GM |
325 | static int window_to_frame_vpos P_ ((struct window *, int)); |
326 | static int window_to_frame_hpos P_ ((struct window *, int)); | |
327 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) | |
328 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 329 | |
9b0e97aa GM |
330 | /* One element of the ring buffer containing redisplay history |
331 | information. */ | |
332 | ||
333 | struct redisplay_history | |
334 | { | |
335 | char trace[512 + 100]; | |
336 | }; | |
337 | ||
338 | /* The size of the history buffer. */ | |
339 | ||
340 | #define REDISPLAY_HISTORY_SIZE 30 | |
341 | ||
342 | /* The redisplay history buffer. */ | |
343 | ||
344 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
345 | ||
346 | /* Next free entry in redisplay_history. */ | |
347 | ||
348 | static int history_idx; | |
349 | ||
350 | /* A tick that's incremented each time something is added to the | |
351 | history. */ | |
352 | ||
353 | static unsigned history_tick; | |
354 | ||
355 | static void add_frame_display_history P_ ((struct frame *, int)); | |
356 | static void add_window_display_history P_ ((struct window *, char *, int)); | |
357 | ||
358 | ||
359 | /* Add to the redisplay history how window W has been displayed. | |
360 | MSG is a trace containing the information how W's glyph matrix | |
153a073c | 361 | has been constructed. PAUSED_P non-zero means that the update |
9b0e97aa GM |
362 | has been interrupted for pending input. */ |
363 | ||
364 | static void | |
365 | add_window_display_history (w, msg, paused_p) | |
366 | struct window *w; | |
367 | char *msg; | |
368 | int paused_p; | |
369 | { | |
370 | char *buf; | |
177c0ea7 | 371 | |
9b0e97aa GM |
372 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
373 | history_idx = 0; | |
374 | buf = redisplay_history[history_idx].trace; | |
375 | ++history_idx; | |
177c0ea7 | 376 | |
9b0e97aa GM |
377 | sprintf (buf, "%d: window %p (`%s')%s\n", |
378 | history_tick++, | |
379 | w, | |
380 | ((BUFFERP (w->buffer) | |
381 | && STRINGP (XBUFFER (w->buffer)->name)) | |
d5db4077 | 382 | ? (char *) SDATA (XBUFFER (w->buffer)->name) |
9b0e97aa GM |
383 | : "???"), |
384 | paused_p ? " ***paused***" : ""); | |
385 | strcat (buf, msg); | |
386 | } | |
387 | ||
388 | ||
389 | /* Add to the redisplay history that frame F has been displayed. | |
390 | PAUSED_P non-zero means that the update has been interrupted for | |
391 | pending input. */ | |
392 | ||
393 | static void | |
394 | add_frame_display_history (f, paused_p) | |
395 | struct frame *f; | |
396 | int paused_p; | |
397 | { | |
398 | char *buf; | |
177c0ea7 | 399 | |
9b0e97aa GM |
400 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
401 | history_idx = 0; | |
402 | buf = redisplay_history[history_idx].trace; | |
403 | ++history_idx; | |
177c0ea7 | 404 | |
9b0e97aa GM |
405 | sprintf (buf, "%d: update frame %p%s", |
406 | history_tick++, | |
407 | f, paused_p ? " ***paused***" : ""); | |
408 | } | |
409 | ||
410 | ||
411 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, | |
412 | Sdump_redisplay_history, 0, 0, "", | |
7ee72033 MB |
413 | doc: /* Dump redisplay history to stderr. */) |
414 | () | |
9b0e97aa GM |
415 | { |
416 | int i; | |
417 | ||
418 | for (i = history_idx - 1; i != history_idx; --i) | |
419 | { | |
420 | if (i < 0) | |
421 | i = REDISPLAY_HISTORY_SIZE - 1; | |
422 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
423 | } | |
424 | ||
425 | return Qnil; | |
426 | } | |
427 | ||
428 | ||
5f5c8ee5 | 429 | #else /* GLYPH_DEBUG == 0 */ |
4588ec20 | 430 | |
7df02016 KS |
431 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
432 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 433 | |
5f5c8ee5 | 434 | #endif /* GLYPH_DEBUG == 0 */ |
4588ec20 | 435 | |
4588ec20 | 436 | |
5f5c8ee5 GM |
437 | /* Like bcopy except never gets confused by overlap. Let this be the |
438 | first function defined in this file, or change emacs.c where the | |
439 | address of this function is used. */ | |
4588ec20 JB |
440 | |
441 | void | |
442 | safe_bcopy (from, to, size) | |
ea64076a KR |
443 | const char *from; |
444 | char *to; | |
4588ec20 JB |
445 | int size; |
446 | { | |
b5c685f4 | 447 | if (size <= 0 || from == to) |
4588ec20 JB |
448 | return; |
449 | ||
b5c685f4 JB |
450 | /* If the source and destination don't overlap, then bcopy can |
451 | handle it. If they do overlap, but the destination is lower in | |
452 | memory than the source, we'll assume bcopy can handle that. */ | |
453 | if (to < from || from + size <= to) | |
454 | bcopy (from, to, size); | |
455 | ||
456 | /* Otherwise, we'll copy from the end. */ | |
457 | else | |
4588ec20 | 458 | { |
ea64076a | 459 | register const char *endf = from + size; |
b5c685f4 | 460 | register char *endt = to + size; |
4588ec20 JB |
461 | |
462 | /* If TO - FROM is large, then we should break the copy into | |
463 | nonoverlapping chunks of TO - FROM bytes each. However, if | |
464 | TO - FROM is small, then the bcopy function call overhead | |
465 | makes this not worth it. The crossover point could be about | |
b5c685f4 JB |
466 | anywhere. Since I don't think the obvious copy loop is too |
467 | bad, I'm trying to err in its favor. */ | |
4588ec20 JB |
468 | if (to - from < 64) |
469 | { | |
470 | do | |
471 | *--endt = *--endf; | |
472 | while (endf != from); | |
473 | } | |
474 | else | |
475 | { | |
b5c685f4 | 476 | for (;;) |
4588ec20 JB |
477 | { |
478 | endt -= (to - from); | |
479 | endf -= (to - from); | |
480 | ||
b5c685f4 JB |
481 | if (endt < to) |
482 | break; | |
483 | ||
4588ec20 JB |
484 | bcopy (endf, endt, to - from); |
485 | } | |
b5c685f4 JB |
486 | |
487 | /* If SIZE wasn't a multiple of TO - FROM, there will be a | |
5f5c8ee5 GM |
488 | little left over. The amount left over is (endt + (to - |
489 | from)) - to, which is endt - from. */ | |
4588ec20 JB |
490 | bcopy (from, to, endt - from); |
491 | } | |
492 | } | |
177c0ea7 | 493 | } |
4588ec20 | 494 | |
4588ec20 | 495 | |
5f5c8ee5 GM |
496 | \f |
497 | /*********************************************************************** | |
498 | Glyph Matrices | |
499 | ***********************************************************************/ | |
500 | ||
501 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
502 | pool from which memory for the matrix should be allocated, or null | |
503 | for window-based redisplay where no glyph pools are used. The | |
504 | member `pool' of the glyph matrix structure returned is set to | |
505 | POOL, the structure is otherwise zeroed. */ | |
506 | ||
507 | struct glyph_matrix * | |
508 | new_glyph_matrix (pool) | |
509 | struct glyph_pool *pool; | |
4588ec20 | 510 | { |
5f5c8ee5 GM |
511 | struct glyph_matrix *result; |
512 | ||
513 | /* Allocate and clear. */ | |
514 | result = (struct glyph_matrix *) xmalloc (sizeof *result); | |
515 | bzero (result, sizeof *result); | |
4588ec20 | 516 | |
5f5c8ee5 GM |
517 | /* Increment number of allocated matrices. This count is used |
518 | to detect memory leaks. */ | |
519 | ++glyph_matrix_count; | |
4588ec20 | 520 | |
5f5c8ee5 GM |
521 | /* Set pool and return. */ |
522 | result->pool = pool; | |
523 | return result; | |
4588ec20 JB |
524 | } |
525 | ||
4588ec20 | 526 | |
5f5c8ee5 GM |
527 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
528 | ||
529 | The global counter glyph_matrix_count is decremented when a matrix | |
530 | is freed. If the count gets negative, more structures were freed | |
531 | than allocated, i.e. one matrix was freed more than once or a bogus | |
532 | pointer was passed to this function. | |
177c0ea7 | 533 | |
5f5c8ee5 GM |
534 | If MATRIX->pool is null, this means that the matrix manages its own |
535 | glyph memory---this is done for matrices on X frames. Freeing the | |
536 | matrix also frees the glyph memory in this case. */ | |
537 | ||
538 | static void | |
539 | free_glyph_matrix (matrix) | |
540 | struct glyph_matrix *matrix; | |
4588ec20 | 541 | { |
5f5c8ee5 GM |
542 | if (matrix) |
543 | { | |
544 | int i; | |
545 | ||
546 | /* Detect the case that more matrices are freed than were | |
547 | allocated. */ | |
548 | if (--glyph_matrix_count < 0) | |
549 | abort (); | |
550 | ||
551 | /* Free glyph memory if MATRIX owns it. */ | |
552 | if (matrix->pool == NULL) | |
553 | for (i = 0; i < matrix->rows_allocated; ++i) | |
554 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 555 | |
5f5c8ee5 GM |
556 | /* Free row structures and the matrix itself. */ |
557 | xfree (matrix->rows); | |
558 | xfree (matrix); | |
559 | } | |
560 | } | |
4588ec20 | 561 | |
4588ec20 | 562 | |
5f5c8ee5 GM |
563 | /* Return the number of glyphs to reserve for a marginal area of |
564 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
565 | display line of window W. MARGIN gives the width of the marginal | |
566 | area in canonical character units. MARGIN should be an integer | |
567 | or a float. */ | |
568 | ||
569 | static int | |
570 | margin_glyphs_to_reserve (w, total_glyphs, margin) | |
571 | struct window *w; | |
572 | int total_glyphs; | |
573 | Lisp_Object margin; | |
574 | { | |
575 | int n; | |
4588ec20 | 576 | |
5f5c8ee5 | 577 | if (NUMBERP (margin)) |
4588ec20 | 578 | { |
7df02016 | 579 | int width = XFASTINT (w->total_cols); |
5f5c8ee5 GM |
580 | double d = max (0, XFLOATINT (margin)); |
581 | d = min (width / 2 - 1, d); | |
582 | n = (int) ((double) total_glyphs / width * d); | |
583 | } | |
584 | else | |
585 | n = 0; | |
586 | ||
587 | return n; | |
588 | } | |
589 | ||
4588ec20 | 590 | |
5f5c8ee5 GM |
591 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
592 | window sizes. | |
4588ec20 | 593 | |
5f5c8ee5 GM |
594 | W is null if the function is called for a frame glyph matrix. |
595 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
596 | indices of the first column and row of MATRIX within the frame | |
597 | matrix, if such a matrix exists. They are zero for purely | |
598 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 599 | |
5f5c8ee5 GM |
600 | In window-based redisplay, where no frame matrices exist, glyph |
601 | matrices manage their own glyph storage. Otherwise, they allocate | |
602 | storage from a common frame glyph pool which can be found in | |
603 | MATRIX->pool. | |
23b0200c | 604 | |
5f5c8ee5 GM |
605 | The reason for this memory management strategy is to avoid complete |
606 | frame redraws if possible. When we allocate from a common pool, a | |
607 | change of the location or size of a sub-matrix within the pool | |
608 | requires a complete redisplay of the frame because we cannot easily | |
609 | make sure that the current matrices of all windows still agree with | |
610 | what is displayed on the screen. While this is usually fast, it | |
611 | leads to screen flickering. */ | |
23b0200c | 612 | |
5f5c8ee5 GM |
613 | static void |
614 | adjust_glyph_matrix (w, matrix, x, y, dim) | |
615 | struct window *w; | |
616 | struct glyph_matrix *matrix; | |
617 | int x, y; | |
618 | struct dim dim; | |
619 | { | |
620 | int i; | |
621 | int new_rows; | |
622 | int marginal_areas_changed_p = 0; | |
045dee35 GM |
623 | int header_line_changed_p = 0; |
624 | int header_line_p = 0; | |
5f5c8ee5 | 625 | int left = -1, right = -1; |
7df02016 | 626 | int window_width = -1, window_height; |
5f5c8ee5 | 627 | |
153a073c | 628 | /* See if W had a header line that has disappeared now, or vice versa. */ |
5f5c8ee5 GM |
629 | if (w) |
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 | |
5f5c8ee5 GM |
636 | /* Do nothing if MATRIX' size, position, vscroll, and marginal areas |
637 | haven't changed. This optimization is important because preserving | |
638 | the matrix means preventing redisplay. */ | |
639 | if (matrix->pool == NULL) | |
640 | { | |
7df02016 KS |
641 | window_box (w, -1, 0, 0, &window_width, &window_height); |
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 | |
726 | its own memory. Allocate glyph memory from the heap. */ | |
727 | if (dim.width > matrix->matrix_w | |
728 | || new_rows | |
045dee35 | 729 | || header_line_changed_p |
5f5c8ee5 | 730 | || marginal_areas_changed_p) |
4588ec20 | 731 | { |
5f5c8ee5 GM |
732 | struct glyph_row *row = matrix->rows; |
733 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 734 | |
5f5c8ee5 GM |
735 | while (row < end) |
736 | { | |
737 | row->glyphs[LEFT_MARGIN_AREA] | |
738 | = (struct glyph *) xrealloc (row->glyphs[LEFT_MARGIN_AREA], | |
739 | (dim.width | |
740 | * sizeof (struct glyph))); | |
177c0ea7 | 741 | |
5f5c8ee5 GM |
742 | /* The mode line never has marginal areas. */ |
743 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 744 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
745 | { |
746 | row->glyphs[TEXT_AREA] | |
747 | = row->glyphs[LEFT_MARGIN_AREA]; | |
748 | row->glyphs[RIGHT_MARGIN_AREA] | |
749 | = row->glyphs[TEXT_AREA] + dim.width; | |
750 | row->glyphs[LAST_AREA] | |
751 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
752 | } | |
753 | else | |
754 | { | |
755 | row->glyphs[TEXT_AREA] | |
756 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
757 | row->glyphs[RIGHT_MARGIN_AREA] | |
758 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
759 | row->glyphs[LAST_AREA] | |
760 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
761 | } | |
762 | ++row; | |
763 | } | |
4588ec20 JB |
764 | } |
765 | ||
5f5c8ee5 GM |
766 | xassert (left >= 0 && right >= 0); |
767 | matrix->left_margin_glyphs = left; | |
768 | matrix->right_margin_glyphs = right; | |
769 | } | |
177c0ea7 | 770 | |
5f5c8ee5 GM |
771 | /* Number of rows to be used by MATRIX. */ |
772 | matrix->nrows = dim.height; | |
3ed36514 | 773 | xassert (matrix->nrows >= 0); |
5f5c8ee5 | 774 | |
b7b20fbd | 775 | if (w) |
5f5c8ee5 | 776 | { |
b7b20fbd | 777 | if (matrix == w->current_matrix) |
4588ec20 | 778 | { |
b7b20fbd GM |
779 | /* Mark rows in a current matrix of a window as not having |
780 | valid contents. It's important to not do this for | |
781 | desired matrices. When Emacs starts, it may already be | |
782 | building desired matrices when this function runs. */ | |
783 | if (window_width < 0) | |
784 | window_width = window_box_width (w, -1); | |
177c0ea7 | 785 | |
b7b20fbd GM |
786 | /* Optimize the case that only the height has changed (C-x 2, |
787 | upper window). Invalidate all rows that are no longer part | |
788 | of the window. */ | |
789 | if (!marginal_areas_changed_p | |
73d75a62 GM |
790 | && !header_line_changed_p |
791 | && new_rows == 0 | |
792 | && dim.width == matrix->matrix_w | |
7df02016 KS |
793 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
794 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 795 | && matrix->window_width == window_width) |
b7b20fbd | 796 | { |
dd42b31a GM |
797 | /* Find the last row in the window. */ |
798 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
799 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
800 | { | |
26447967 | 801 | ++i; |
dd42b31a GM |
802 | break; |
803 | } | |
b7b20fbd GM |
804 | |
805 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 806 | are invalidated below. */ |
b7b20fbd GM |
807 | if (INTEGERP (w->window_end_vpos) |
808 | && XFASTINT (w->window_end_vpos) >= i) | |
809 | w->window_end_valid = Qnil; | |
177c0ea7 | 810 | |
b7b20fbd GM |
811 | while (i < matrix->nrows) |
812 | matrix->rows[i++].enabled_p = 0; | |
813 | } | |
814 | else | |
815 | { | |
816 | for (i = 0; i < matrix->nrows; ++i) | |
817 | matrix->rows[i].enabled_p = 0; | |
818 | } | |
5f5c8ee5 | 819 | } |
b7b20fbd | 820 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 821 | { |
b7b20fbd GM |
822 | /* Rows in desired matrices always have to be cleared; |
823 | redisplay expects this is the case when it runs, so it | |
824 | had better be the case when we adjust matrices between | |
825 | redisplays. */ | |
5f5c8ee5 GM |
826 | for (i = 0; i < matrix->nrows; ++i) |
827 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 828 | } |
4588ec20 | 829 | } |
177c0ea7 JB |
830 | |
831 | ||
5f5c8ee5 GM |
832 | /* Remember last values to be able to optimize frame redraws. */ |
833 | matrix->matrix_x = x; | |
834 | matrix->matrix_y = y; | |
835 | matrix->matrix_w = dim.width; | |
836 | matrix->matrix_h = dim.height; | |
837 | ||
838 | /* Record the top y location and height of W at the time the matrix | |
839 | was last adjusted. This is used to optimize redisplay above. */ | |
840 | if (w) | |
4588ec20 | 841 | { |
7df02016 KS |
842 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
843 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
844 | matrix->window_height = window_height; |
845 | matrix->window_width = window_width; | |
846 | matrix->window_vscroll = w->vscroll; | |
847 | } | |
848 | } | |
4588ec20 | 849 | |
4588ec20 | 850 | |
5f5c8ee5 GM |
851 | /* Reverse the contents of rows in MATRIX between START and END. The |
852 | contents of the row at END - 1 end up at START, END - 2 at START + | |
853 | 1 etc. This is part of the implementation of rotate_matrix (see | |
854 | below). */ | |
d52bad65 | 855 | |
5f5c8ee5 GM |
856 | static void |
857 | reverse_rows (matrix, start, end) | |
858 | struct glyph_matrix *matrix; | |
859 | int start, end; | |
860 | { | |
861 | int i, j; | |
23b0200c | 862 | |
5f5c8ee5 GM |
863 | for (i = start, j = end - 1; i < j; ++i, --j) |
864 | { | |
865 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
866 | initialization. */ | |
867 | struct glyph_row temp; | |
868 | temp = matrix->rows[i]; | |
869 | matrix->rows[i] = matrix->rows[j]; | |
870 | matrix->rows[j] = temp; | |
871 | } | |
872 | } | |
23b0200c | 873 | |
23b0200c | 874 | |
5f5c8ee5 GM |
875 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
876 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
877 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
878 | row structures are moved around). | |
60a8948a | 879 | |
5f5c8ee5 GM |
880 | The algorithm used for rotating the vector was, I believe, first |
881 | described by Kernighan. See the vector R as consisting of two | |
882 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
883 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
884 | and reverse the result to get (ArBr)r which is BA. Similar for | |
885 | rotating right. */ | |
886 | ||
887 | void | |
888 | rotate_matrix (matrix, first, last, by) | |
889 | struct glyph_matrix *matrix; | |
890 | int first, last, by; | |
891 | { | |
892 | if (by < 0) | |
893 | { | |
894 | /* Up (rotate left, i.e. towards lower indices). */ | |
895 | by = -by; | |
896 | reverse_rows (matrix, first, first + by); | |
897 | reverse_rows (matrix, first + by, last); | |
898 | reverse_rows (matrix, first, last); | |
899 | } | |
900 | else if (by > 0) | |
901 | { | |
902 | /* Down (rotate right, i.e. towards higher indices). */ | |
903 | reverse_rows (matrix, last - by, last); | |
904 | reverse_rows (matrix, first, last - by); | |
905 | reverse_rows (matrix, first, last); | |
906 | } | |
907 | } | |
908 | ||
909 | ||
910 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
911 | with indices START <= index < END. Increment positions by DELTA/ | |
912 | DELTA_BYTES. */ | |
913 | ||
914 | void | |
86c11ba1 | 915 | increment_matrix_positions (matrix, start, end, delta, delta_bytes) |
5f5c8ee5 GM |
916 | struct glyph_matrix *matrix; |
917 | int start, end, delta, delta_bytes; | |
918 | { | |
919 | /* Check that START and END are reasonable values. */ | |
920 | xassert (start >= 0 && start <= matrix->nrows); | |
921 | xassert (end >= 0 && end <= matrix->nrows); | |
922 | xassert (start <= end); | |
923 | ||
924 | for (; start < end; ++start) | |
86c11ba1 | 925 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
926 | } |
927 | ||
928 | ||
929 | /* Enable a range of rows in glyph matrix MATRIX. START and END are | |
930 | the row indices of the first and last + 1 row to enable. If | |
931 | ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */ | |
932 | ||
933 | void | |
934 | enable_glyph_matrix_rows (matrix, start, end, enabled_p) | |
935 | struct glyph_matrix *matrix; | |
936 | int start, end; | |
937 | int enabled_p; | |
938 | { | |
3ed36514 GM |
939 | xassert (start <= end); |
940 | xassert (start >= 0 && start < matrix->nrows); | |
941 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 942 | |
5f5c8ee5 GM |
943 | for (; start < end; ++start) |
944 | matrix->rows[start].enabled_p = enabled_p != 0; | |
945 | } | |
946 | ||
947 | ||
948 | /* Clear MATRIX. | |
949 | ||
950 | This empties all rows in MATRIX by setting the enabled_p flag for | |
951 | all rows of the matrix to zero. The function prepare_desired_row | |
952 | will eventually really clear a row when it sees one with a zero | |
953 | enabled_p flag. | |
954 | ||
955 | Resets update hints to defaults value. The only update hint | |
956 | currently present is the flag MATRIX->no_scrolling_p. */ | |
957 | ||
958 | void | |
959 | clear_glyph_matrix (matrix) | |
960 | struct glyph_matrix *matrix; | |
961 | { | |
962 | if (matrix) | |
963 | { | |
964 | enable_glyph_matrix_rows (matrix, 0, matrix->nrows, 0); | |
965 | matrix->no_scrolling_p = 0; | |
966 | } | |
967 | } | |
177c0ea7 | 968 | |
5f5c8ee5 GM |
969 | |
970 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
971 | Increment y-positions in glyph rows between START and END by DY, | |
972 | and recompute their visible height. */ | |
973 | ||
974 | void | |
975 | shift_glyph_matrix (w, matrix, start, end, dy) | |
976 | struct window *w; | |
977 | struct glyph_matrix *matrix; | |
978 | int start, end, dy; | |
979 | { | |
980 | int min_y, max_y; | |
177c0ea7 | 981 | |
5f5c8ee5 GM |
982 | xassert (start <= end); |
983 | xassert (start >= 0 && start < matrix->nrows); | |
984 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 985 | |
7df02016 KS |
986 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
987 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 988 | |
5f5c8ee5 GM |
989 | for (; start < end; ++start) |
990 | { | |
991 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 992 | |
5f5c8ee5 | 993 | row->y += dy; |
d6c747a4 | 994 | row->visible_height = row->height; |
177c0ea7 | 995 | |
5f5c8ee5 | 996 | if (row->y < min_y) |
d6c747a4 GM |
997 | row->visible_height -= min_y - row->y; |
998 | if (row->y + row->height > max_y) | |
999 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
1000 | } |
1001 | } | |
1002 | ||
1003 | ||
1004 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
1005 | invalid is done by setting enabled_p to zero for all rows in a | |
1006 | current matrix. */ | |
1007 | ||
1008 | void | |
1009 | clear_current_matrices (f) | |
1010 | register struct frame *f; | |
1011 | { | |
1012 | /* Clear frame current matrix, if we have one. */ | |
1013 | if (f->current_matrix) | |
1014 | clear_glyph_matrix (f->current_matrix); | |
1015 | ||
1016 | /* Clear the matrix of the menu bar window, if such a window exists. | |
1017 | The menu bar window is currently used to display menus on X when | |
1018 | no toolkit support is compiled in. */ | |
1019 | if (WINDOWP (f->menu_bar_window)) | |
1020 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
1021 | ||
9ea173e8 GM |
1022 | /* Clear the matrix of the tool-bar window, if any. */ |
1023 | if (WINDOWP (f->tool_bar_window)) | |
1024 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
5f5c8ee5 GM |
1025 | |
1026 | /* Clear current window matrices. */ | |
1027 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
1028 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); | |
1029 | } | |
1030 | ||
1031 | ||
1032 | /* Clear out all display lines of F for a coming redisplay. */ | |
1033 | ||
1034 | void | |
1035 | clear_desired_matrices (f) | |
1036 | register struct frame *f; | |
1037 | { | |
1038 | if (f->desired_matrix) | |
1039 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 1040 | |
5f5c8ee5 GM |
1041 | if (WINDOWP (f->menu_bar_window)) |
1042 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
1043 | ||
9ea173e8 GM |
1044 | if (WINDOWP (f->tool_bar_window)) |
1045 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
5f5c8ee5 GM |
1046 | |
1047 | /* Do it for window matrices. */ | |
1048 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
1049 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
1050 | } | |
1051 | ||
1052 | ||
1053 | /* Clear matrices in window tree rooted in W. If DESIRED_P is | |
1054 | non-zero clear desired matrices, otherwise clear current matrices. */ | |
1055 | ||
1056 | static void | |
1057 | clear_window_matrices (w, desired_p) | |
1058 | struct window *w; | |
1059 | int desired_p; | |
1060 | { | |
1061 | while (w) | |
1062 | { | |
1063 | if (!NILP (w->hchild)) | |
1064 | { | |
1065 | xassert (WINDOWP (w->hchild)); | |
1066 | clear_window_matrices (XWINDOW (w->hchild), desired_p); | |
1067 | } | |
1068 | else if (!NILP (w->vchild)) | |
1069 | { | |
1070 | xassert (WINDOWP (w->vchild)); | |
1071 | clear_window_matrices (XWINDOW (w->vchild), desired_p); | |
1072 | } | |
1073 | else | |
1074 | { | |
1075 | if (desired_p) | |
1076 | clear_glyph_matrix (w->desired_matrix); | |
1077 | else | |
1078 | { | |
1079 | clear_glyph_matrix (w->current_matrix); | |
1080 | w->window_end_valid = Qnil; | |
1081 | } | |
1082 | } | |
1083 | ||
1084 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
1085 | } | |
1086 | } | |
1087 | ||
1088 | ||
1089 | \f | |
1090 | /*********************************************************************** | |
1091 | Glyph Rows | |
1092 | ||
1093 | See dispextern.h for an overall explanation of glyph rows. | |
1094 | ***********************************************************************/ | |
1095 | ||
1096 | /* Clear glyph row ROW. Do it in a way that makes it robust against | |
1097 | changes in the glyph_row structure, i.e. addition or removal of | |
1098 | structure members. */ | |
1099 | ||
2cca872d KH |
1100 | static struct glyph_row null_row; |
1101 | ||
5f5c8ee5 GM |
1102 | void |
1103 | clear_glyph_row (row) | |
1104 | struct glyph_row *row; | |
1105 | { | |
1106 | struct glyph *p[1 + LAST_AREA]; | |
5f5c8ee5 GM |
1107 | |
1108 | /* Save pointers. */ | |
1109 | p[LEFT_MARGIN_AREA] = row->glyphs[LEFT_MARGIN_AREA]; | |
1110 | p[TEXT_AREA] = row->glyphs[TEXT_AREA]; | |
1111 | p[RIGHT_MARGIN_AREA] = row->glyphs[RIGHT_MARGIN_AREA]; | |
1112 | p[LAST_AREA] = row->glyphs[LAST_AREA]; | |
1113 | ||
1114 | /* Clear. */ | |
1115 | *row = null_row; | |
1116 | ||
1117 | /* Restore pointers. */ | |
1118 | row->glyphs[LEFT_MARGIN_AREA] = p[LEFT_MARGIN_AREA]; | |
1119 | row->glyphs[TEXT_AREA] = p[TEXT_AREA]; | |
1120 | row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA]; | |
1121 | row->glyphs[LAST_AREA] = p[LAST_AREA]; | |
45560b1a GM |
1122 | |
1123 | #if 0 /* At some point, some bit-fields of struct glyph were not set, | |
1124 | which made glyphs unequal when compared with GLYPH_EQUAL_P. | |
1125 | Redisplay outputs such glyphs, and flickering effects were | |
1126 | the result. This also depended on the contents of memory | |
1127 | returned by xmalloc. If flickering happens again, activate | |
153a073c | 1128 | the code below. If the flickering is gone with that, chances |
45560b1a GM |
1129 | are that the flickering has the same reason as here. */ |
1130 | bzero (p[0], (char *) p[LAST_AREA] - (char *) p[0]); | |
1131 | #endif | |
5f5c8ee5 GM |
1132 | } |
1133 | ||
1134 | ||
1135 | /* Make ROW an empty, enabled row of canonical character height, | |
1136 | in window W starting at y-position Y. */ | |
1137 | ||
1138 | void | |
1139 | blank_row (w, row, y) | |
1140 | struct window *w; | |
1141 | struct glyph_row *row; | |
1142 | int y; | |
1143 | { | |
1144 | int min_y, max_y; | |
177c0ea7 | 1145 | |
7df02016 KS |
1146 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
1147 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 1148 | |
5f5c8ee5 GM |
1149 | clear_glyph_row (row); |
1150 | row->y = y; | |
408f5064 | 1151 | row->ascent = row->phys_ascent = 0; |
7df02016 | 1152 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 1153 | row->visible_height = row->height; |
177c0ea7 | 1154 | |
5f5c8ee5 | 1155 | if (row->y < min_y) |
d6c747a4 GM |
1156 | row->visible_height -= min_y - row->y; |
1157 | if (row->y + row->height > max_y) | |
1158 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
1159 | |
1160 | row->enabled_p = 1; | |
1161 | } | |
1162 | ||
1163 | ||
1164 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
1165 | are the amounts by which to change positions. Note that the first | |
1166 | glyph of the text area of a row can have a buffer position even if | |
1167 | the used count of the text area is zero. Such rows display line | |
1168 | ends. */ | |
1169 | ||
1170 | void | |
86c11ba1 | 1171 | increment_row_positions (row, delta, delta_bytes) |
5f5c8ee5 GM |
1172 | struct glyph_row *row; |
1173 | int delta, delta_bytes; | |
1174 | { | |
1175 | int area, i; | |
1176 | ||
1177 | /* Increment start and end positions. */ | |
1178 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
1179 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
1180 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
1181 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
1182 | ||
1183 | /* Increment positions in glyphs. */ | |
1184 | for (area = 0; area < LAST_AREA; ++area) | |
1185 | for (i = 0; i < row->used[area]; ++i) | |
1186 | if (BUFFERP (row->glyphs[area][i].object) | |
1187 | && row->glyphs[area][i].charpos > 0) | |
1188 | row->glyphs[area][i].charpos += delta; | |
1189 | ||
1190 | /* Capture the case of rows displaying a line end. */ | |
1191 | if (row->used[TEXT_AREA] == 0 | |
1192 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1193 | row->glyphs[TEXT_AREA]->charpos += delta; | |
1194 | } | |
1195 | ||
1196 | ||
9af3e742 | 1197 | #if 0 |
5f5c8ee5 GM |
1198 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
1199 | contents, i.e. glyph structure contents are exchanged between A and | |
1200 | B without changing glyph pointers in A and B. */ | |
1201 | ||
1202 | static void | |
1203 | swap_glyphs_in_rows (a, b) | |
1204 | struct glyph_row *a, *b; | |
1205 | { | |
1206 | int area; | |
1207 | ||
1208 | for (area = 0; area < LAST_AREA; ++area) | |
1209 | { | |
1210 | /* Number of glyphs to swap. */ | |
1211 | int max_used = max (a->used[area], b->used[area]); | |
1212 | ||
1213 | /* Start of glyphs in area of row A. */ | |
1214 | struct glyph *glyph_a = a->glyphs[area]; | |
1215 | ||
1216 | /* End + 1 of glyphs in area of row A. */ | |
1217 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
1218 | ||
1219 | /* Start of glyphs in area of row B. */ | |
1220 | struct glyph *glyph_b = b->glyphs[area]; | |
1221 | ||
1222 | while (glyph_a < glyph_a_end) | |
1223 | { | |
1224 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
1225 | initialization. */ | |
1226 | struct glyph temp; | |
1227 | temp = *glyph_a; | |
1228 | *glyph_a = *glyph_b; | |
1229 | *glyph_b = temp; | |
1230 | ++glyph_a; | |
1231 | ++glyph_b; | |
1232 | } | |
1233 | } | |
1234 | } | |
1235 | ||
9af3e742 | 1236 | #endif /* 0 */ |
5f5c8ee5 GM |
1237 | |
1238 | /* Exchange pointers to glyph memory between glyph rows A and B. */ | |
1239 | ||
1240 | static INLINE void | |
1241 | swap_glyph_pointers (a, b) | |
1242 | struct glyph_row *a, *b; | |
1243 | { | |
1244 | int i; | |
1245 | for (i = 0; i < LAST_AREA + 1; ++i) | |
1246 | { | |
1247 | struct glyph *temp = a->glyphs[i]; | |
1248 | a->glyphs[i] = b->glyphs[i]; | |
1249 | b->glyphs[i] = temp; | |
1250 | } | |
1251 | } | |
1252 | ||
1253 | ||
1254 | /* Copy glyph row structure FROM to glyph row structure TO, except | |
1255 | that glyph pointers in the structures are left unchanged. */ | |
1256 | ||
1257 | INLINE void | |
1258 | copy_row_except_pointers (to, from) | |
1259 | struct glyph_row *to, *from; | |
1260 | { | |
1261 | struct glyph *pointers[1 + LAST_AREA]; | |
1262 | ||
1263 | /* Save glyph pointers of TO. */ | |
1264 | bcopy (to->glyphs, pointers, sizeof to->glyphs); | |
1265 | ||
1266 | /* Do a structure assignment. */ | |
1267 | *to = *from; | |
1268 | ||
1269 | /* Restore original pointers of TO. */ | |
1270 | bcopy (pointers, to->glyphs, sizeof to->glyphs); | |
1271 | } | |
1272 | ||
1273 | ||
1274 | /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in | |
1275 | TO and FROM are left unchanged. Glyph contents are copied from the | |
1276 | glyph memory of FROM to the glyph memory of TO. Increment buffer | |
1277 | positions in row TO by DELTA/ DELTA_BYTES. */ | |
1278 | ||
1279 | void | |
1280 | copy_glyph_row_contents (to, from, delta, delta_bytes) | |
1281 | struct glyph_row *to, *from; | |
1282 | int delta, delta_bytes; | |
1283 | { | |
1284 | int area; | |
1285 | ||
1286 | /* This is like a structure assignment TO = FROM, except that | |
1287 | glyph pointers in the rows are left unchanged. */ | |
1288 | copy_row_except_pointers (to, from); | |
1289 | ||
1290 | /* Copy glyphs from FROM to TO. */ | |
1291 | for (area = 0; area < LAST_AREA; ++area) | |
1292 | if (from->used[area]) | |
177c0ea7 | 1293 | bcopy (from->glyphs[area], to->glyphs[area], |
5f5c8ee5 GM |
1294 | from->used[area] * sizeof (struct glyph)); |
1295 | ||
1296 | /* Increment buffer positions in TO by DELTA. */ | |
86c11ba1 | 1297 | increment_row_positions (to, delta, delta_bytes); |
5f5c8ee5 GM |
1298 | } |
1299 | ||
1300 | ||
1301 | /* Assign glyph row FROM to glyph row TO. This works like a structure | |
1302 | assignment TO = FROM, except that glyph pointers are not copied but | |
1303 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1304 | a memory leak. */ | |
1305 | ||
1306 | static INLINE void | |
1307 | assign_row (to, from) | |
1308 | struct glyph_row *to, *from; | |
1309 | { | |
1310 | swap_glyph_pointers (to, from); | |
1311 | copy_row_except_pointers (to, from); | |
1312 | } | |
1313 | ||
1314 | ||
1315 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1316 | a row in a window matrix, is a slice of the glyph memory of the | |
1317 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
1318 | is non-zero if the glyph memory of WINDOW_ROW is part of the glyph | |
1319 | memory of FRAME_ROW. */ | |
1320 | ||
2d5912c1 | 1321 | #if GLYPH_DEBUG |
9339e87f | 1322 | |
5f5c8ee5 GM |
1323 | static int |
1324 | glyph_row_slice_p (window_row, frame_row) | |
1325 | struct glyph_row *window_row, *frame_row; | |
1326 | { | |
1327 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1328 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1329 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1330 | ||
1331 | return (frame_glyph_start <= window_glyph_start | |
1332 | && window_glyph_start < frame_glyph_end); | |
1333 | } | |
1334 | ||
9339e87f | 1335 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1336 | |
9af3e742 GM |
1337 | #if 0 |
1338 | ||
5f5c8ee5 GM |
1339 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1340 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1341 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1342 | ||
1343 | static struct glyph_row * | |
1344 | find_glyph_row_slice (window_matrix, frame_matrix, row) | |
1345 | struct glyph_matrix *window_matrix, *frame_matrix; | |
1346 | int row; | |
1347 | { | |
1348 | int i; | |
1349 | ||
1350 | xassert (row >= 0 && row < frame_matrix->nrows); | |
1351 | ||
1352 | for (i = 0; i < window_matrix->nrows; ++i) | |
1353 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1354 | frame_matrix->rows + row)) | |
1355 | break; | |
1356 | ||
1357 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1358 | } | |
1359 | ||
9af3e742 | 1360 | #endif /* 0 */ |
5f5c8ee5 GM |
1361 | |
1362 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1363 | i.e. they are only marked as to be cleared by setting their | |
1364 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1365 | call to this function really clears it. */ | |
1366 | ||
1367 | void | |
1368 | prepare_desired_row (row) | |
1369 | struct glyph_row *row; | |
1370 | { | |
1371 | if (!row->enabled_p) | |
1372 | { | |
1373 | clear_glyph_row (row); | |
1374 | row->enabled_p = 1; | |
1375 | } | |
1376 | } | |
1377 | ||
1378 | ||
1379 | /* Return a hash code for glyph row ROW. */ | |
1380 | ||
1381 | int | |
1382 | line_hash_code (row) | |
1383 | struct glyph_row *row; | |
1384 | { | |
1385 | int hash = 0; | |
177c0ea7 | 1386 | |
5f5c8ee5 GM |
1387 | if (row->enabled_p) |
1388 | { | |
4cecaab8 MB |
1389 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1390 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1391 | ||
1392 | while (glyph < end) | |
1393 | { | |
1394 | int c = glyph->u.ch; | |
1395 | int face_id = glyph->face_id; | |
1396 | if (must_write_spaces) | |
1397 | c -= SPACEGLYPH; | |
1398 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1399 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1400 | ++glyph; | |
1401 | } | |
5f5c8ee5 | 1402 | |
4cecaab8 MB |
1403 | if (hash == 0) |
1404 | hash = 1; | |
5f5c8ee5 GM |
1405 | } |
1406 | ||
1407 | return hash; | |
1408 | } | |
1409 | ||
1410 | ||
153a073c | 1411 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1412 | the number of characters in the line. If must_write_spaces is |
1413 | zero, leading and trailing spaces are ignored. */ | |
1414 | ||
1415 | static unsigned int | |
1416 | line_draw_cost (matrix, vpos) | |
1417 | struct glyph_matrix *matrix; | |
1418 | int vpos; | |
1419 | { | |
1420 | struct glyph_row *row = matrix->rows + vpos; | |
1421 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1422 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1423 | int len; | |
1424 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
1425 | int glyph_table_len = GLYPH_TABLE_LENGTH; | |
1426 | ||
1427 | /* Ignore trailing and leading spaces if we can. */ | |
1428 | if (!must_write_spaces) | |
1429 | { | |
1430 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1431 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1432 | --end; |
1433 | ||
177c0ea7 | 1434 | /* All blank line. */ |
5f5c8ee5 GM |
1435 | if (end == beg) |
1436 | return 0; | |
1437 | ||
1438 | /* Skip over leading spaces. */ | |
1439 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1440 | ++beg; | |
1441 | } | |
1442 | ||
1443 | /* If we don't have a glyph-table, each glyph is one character, | |
1444 | so return the number of glyphs. */ | |
1445 | if (glyph_table_base == 0) | |
1446 | len = end - beg; | |
1447 | else | |
1448 | { | |
1449 | /* Otherwise, scan the glyphs and accumulate their total length | |
1450 | in LEN. */ | |
1451 | len = 0; | |
1452 | while (beg < end) | |
1453 | { | |
1454 | GLYPH g = GLYPH_FROM_CHAR_GLYPH (*beg); | |
177c0ea7 | 1455 | |
42186983 KH |
1456 | if (g < 0 |
1457 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) | |
5f5c8ee5 GM |
1458 | len += 1; |
1459 | else | |
1460 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1461 | |
5f5c8ee5 GM |
1462 | ++beg; |
1463 | } | |
1464 | } | |
177c0ea7 | 1465 | |
5f5c8ee5 GM |
1466 | return len; |
1467 | } | |
1468 | ||
1469 | ||
1470 | /* Test two glyph rows A and B for equality. Value is non-zero if A | |
1471 | and B have equal contents. W is the window to which the glyphs | |
1472 | rows A and B belong. It is needed here to test for partial row | |
e4e0bee9 GM |
1473 | visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p |
1474 | flags of A and B, too. */ | |
5f5c8ee5 | 1475 | |
177c0ea7 | 1476 | static INLINE int |
e4e0bee9 | 1477 | row_equal_p (w, a, b, mouse_face_p) |
5f5c8ee5 GM |
1478 | struct window *w; |
1479 | struct glyph_row *a, *b; | |
e4e0bee9 | 1480 | int mouse_face_p; |
5f5c8ee5 GM |
1481 | { |
1482 | if (a == b) | |
1483 | return 1; | |
1484 | else if (a->hash != b->hash) | |
1485 | return 0; | |
1486 | else | |
1487 | { | |
1488 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1489 | int area; | |
1490 | ||
e4e0bee9 GM |
1491 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1492 | return 0; | |
1493 | ||
5f5c8ee5 GM |
1494 | /* Compare glyphs. */ |
1495 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1496 | { | |
1497 | if (a->used[area] != b->used[area]) | |
1498 | return 0; | |
177c0ea7 | 1499 | |
5f5c8ee5 GM |
1500 | a_glyph = a->glyphs[area]; |
1501 | a_end = a_glyph + a->used[area]; | |
1502 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1503 | |
5f5c8ee5 GM |
1504 | while (a_glyph < a_end |
1505 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1506 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1507 | |
5f5c8ee5 GM |
1508 | if (a_glyph != a_end) |
1509 | return 0; | |
1510 | } | |
1511 | ||
1512 | if (a->truncated_on_left_p != b->truncated_on_left_p | |
5f5c8ee5 GM |
1513 | || a->fill_line_p != b->fill_line_p |
1514 | || a->truncated_on_right_p != b->truncated_on_right_p | |
1515 | || a->overlay_arrow_p != b->overlay_arrow_p | |
1516 | || a->continued_p != b->continued_p | |
1517 | || a->indicate_empty_line_p != b->indicate_empty_line_p | |
408f5064 | 1518 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1519 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1520 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
1521 | /* Different partially visible characters on left margin. */ | |
1522 | || a->x != b->x | |
1523 | /* Different height. */ | |
1524 | || a->ascent != b->ascent | |
408f5064 GM |
1525 | || a->phys_ascent != b->phys_ascent |
1526 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1527 | || a->visible_height != b->visible_height) |
1528 | return 0; | |
1529 | } | |
1530 | ||
1531 | return 1; | |
1532 | } | |
1533 | ||
1534 | ||
1535 | \f | |
1536 | /*********************************************************************** | |
1537 | Glyph Pool | |
1538 | ||
1539 | See dispextern.h for an overall explanation of glyph pools. | |
1540 | ***********************************************************************/ | |
1541 | ||
1542 | /* Allocate a glyph_pool structure. The structure returned is | |
1543 | initialized with zeros. The global variable glyph_pool_count is | |
1544 | incremented for each pool allocated. */ | |
1545 | ||
1546 | static struct glyph_pool * | |
1547 | new_glyph_pool () | |
1548 | { | |
1549 | struct glyph_pool *result; | |
1550 | ||
1551 | /* Allocate a new glyph_pool and clear it. */ | |
1552 | result = (struct glyph_pool *) xmalloc (sizeof *result); | |
1553 | bzero (result, sizeof *result); | |
177c0ea7 | 1554 | |
5f5c8ee5 GM |
1555 | /* For memory leak and double deletion checking. */ |
1556 | ++glyph_pool_count; | |
177c0ea7 | 1557 | |
5f5c8ee5 GM |
1558 | return result; |
1559 | } | |
1560 | ||
1561 | ||
1562 | /* Free a glyph_pool structure POOL. The function may be called with | |
1563 | a null POOL pointer. The global variable glyph_pool_count is | |
1564 | decremented with every pool structure freed. If this count gets | |
1565 | negative, more structures were freed than allocated, i.e. one | |
1566 | structure must have been freed more than once or a bogus pointer | |
1567 | was passed to free_glyph_pool. */ | |
1568 | ||
1569 | static void | |
1570 | free_glyph_pool (pool) | |
1571 | struct glyph_pool *pool; | |
1572 | { | |
1573 | if (pool) | |
1574 | { | |
153a073c | 1575 | /* More freed than allocated? */ |
5f5c8ee5 GM |
1576 | --glyph_pool_count; |
1577 | xassert (glyph_pool_count >= 0); | |
1578 | ||
1579 | xfree (pool->glyphs); | |
1580 | xfree (pool); | |
1581 | } | |
1582 | } | |
1583 | ||
1584 | ||
1585 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1586 | columns we need. This function never shrinks a pool. The only | |
1587 | case in which this would make sense, would be when a frame's size | |
1588 | is changed from a large value to a smaller one. But, if someone | |
1589 | does it once, we can expect that he will do it again. | |
1590 | ||
1591 | Value is non-zero if the pool changed in a way which makes | |
1592 | re-adjusting window glyph matrices necessary. */ | |
1593 | ||
1594 | static int | |
1595 | realloc_glyph_pool (pool, matrix_dim) | |
1596 | struct glyph_pool *pool; | |
1597 | struct dim matrix_dim; | |
1598 | { | |
1599 | int needed; | |
1600 | int changed_p; | |
1601 | ||
1602 | changed_p = (pool->glyphs == 0 | |
1603 | || matrix_dim.height != pool->nrows | |
1604 | || matrix_dim.width != pool->ncolumns); | |
1605 | ||
1606 | /* Enlarge the glyph pool. */ | |
1607 | needed = matrix_dim.width * matrix_dim.height; | |
1608 | if (needed > pool->nglyphs) | |
1609 | { | |
1610 | int size = needed * sizeof (struct glyph); | |
1611 | ||
1612 | if (pool->glyphs) | |
1613 | pool->glyphs = (struct glyph *) xrealloc (pool->glyphs, size); | |
1614 | else | |
1615 | { | |
1616 | pool->glyphs = (struct glyph *) xmalloc (size); | |
1617 | bzero (pool->glyphs, size); | |
1618 | } | |
1619 | ||
1620 | pool->nglyphs = needed; | |
1621 | } | |
1622 | ||
153a073c | 1623 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1624 | to do sanity checks, and (b) the number of columns determines |
1625 | where rows in the frame matrix start---this must be available to | |
1626 | determine pointers to rows of window sub-matrices. */ | |
1627 | pool->nrows = matrix_dim.height; | |
1628 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1629 | |
5f5c8ee5 GM |
1630 | return changed_p; |
1631 | } | |
1632 | ||
1633 | ||
1634 | \f | |
1635 | /*********************************************************************** | |
1636 | Debug Code | |
1637 | ***********************************************************************/ | |
1638 | ||
1639 | #if GLYPH_DEBUG | |
1640 | ||
a13396c9 GM |
1641 | |
1642 | /* Flush standard output. This is sometimes useful to call from | |
1643 | the debugger. */ | |
1644 | ||
1645 | void | |
1646 | flush_stdout () | |
1647 | { | |
1648 | fflush (stdout); | |
1649 | } | |
1650 | ||
1651 | ||
5f5c8ee5 GM |
1652 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1653 | pointer has been lost, e.g. by using a structure assignment between | |
1654 | rows, at least one pointer must occur more than once in the rows of | |
1655 | MATRIX. */ | |
1656 | ||
1657 | void | |
1658 | check_matrix_pointer_lossage (matrix) | |
1659 | struct glyph_matrix *matrix; | |
1660 | { | |
1661 | int i, j; | |
177c0ea7 | 1662 | |
5f5c8ee5 GM |
1663 | for (i = 0; i < matrix->nrows; ++i) |
1664 | for (j = 0; j < matrix->nrows; ++j) | |
1665 | xassert (i == j | |
1666 | || (matrix->rows[i].glyphs[TEXT_AREA] | |
1667 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1668 | } | |
1669 | ||
1670 | ||
1671 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1672 | ||
1673 | struct glyph_row * | |
1674 | matrix_row (matrix, row) | |
1675 | struct glyph_matrix *matrix; | |
1676 | int row; | |
1677 | { | |
1678 | xassert (matrix && matrix->rows); | |
1679 | xassert (row >= 0 && row < matrix->nrows); | |
1680 | ||
1681 | /* That's really too slow for normal testing because this function | |
1682 | is called almost everywhere. Although---it's still astonishingly | |
1683 | fast, so it is valuable to have for debugging purposes. */ | |
1684 | #if 0 | |
1685 | check_matrix_pointer_lossage (matrix); | |
1686 | #endif | |
177c0ea7 | 1687 | |
5f5c8ee5 GM |
1688 | return matrix->rows + row; |
1689 | } | |
1690 | ||
1691 | ||
1692 | #if 0 /* This function makes invalid assumptions when text is | |
1693 | partially invisible. But it might come handy for debugging | |
1694 | nevertheless. */ | |
1695 | ||
1696 | /* Check invariants that must hold for an up to date current matrix of | |
1697 | window W. */ | |
1698 | ||
1699 | static void | |
1700 | check_matrix_invariants (w) | |
1701 | struct window *w; | |
1702 | { | |
1703 | struct glyph_matrix *matrix = w->current_matrix; | |
1704 | int yb = window_text_bottom_y (w); | |
1705 | struct glyph_row *row = matrix->rows; | |
1706 | struct glyph_row *last_text_row = NULL; | |
1707 | struct buffer *saved = current_buffer; | |
1708 | struct buffer *buffer = XBUFFER (w->buffer); | |
1709 | int c; | |
177c0ea7 | 1710 | |
5f5c8ee5 GM |
1711 | /* This can sometimes happen for a fresh window. */ |
1712 | if (matrix->nrows < 2) | |
1713 | return; | |
1714 | ||
1715 | set_buffer_temp (buffer); | |
1716 | ||
1717 | /* Note: last row is always reserved for the mode line. */ | |
1718 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1719 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1720 | { | |
1721 | struct glyph_row *next = row + 1; | |
1722 | ||
1723 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1724 | last_text_row = row; | |
1725 | ||
1726 | /* Check that character and byte positions are in sync. */ | |
1727 | xassert (MATRIX_ROW_START_BYTEPOS (row) | |
1728 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); | |
1729 | ||
1730 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1731 | have such a position temporarily in case of a minibuffer | |
1732 | displaying something like `[Sole completion]' at its end. */ | |
1733 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
1734 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1735 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); | |
1736 | ||
1737 | /* Check that end position of `row' is equal to start position | |
1738 | of next row. */ | |
1739 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1740 | { | |
1741 | xassert (MATRIX_ROW_END_CHARPOS (row) | |
1742 | == MATRIX_ROW_START_CHARPOS (next)); | |
1743 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1744 | == MATRIX_ROW_START_BYTEPOS (next)); | |
1745 | } | |
1746 | row = next; | |
1747 | } | |
1748 | ||
1749 | xassert (w->current_matrix->nrows == w->desired_matrix->nrows); | |
1750 | xassert (w->desired_matrix->rows != NULL); | |
1751 | set_buffer_temp (saved); | |
1752 | } | |
1753 | ||
1754 | #endif /* 0 */ | |
1755 | ||
1756 | #endif /* GLYPH_DEBUG != 0 */ | |
1757 | ||
1758 | ||
1759 | \f | |
1760 | /********************************************************************** | |
1761 | Allocating/ Adjusting Glyph Matrices | |
1762 | **********************************************************************/ | |
1763 | ||
1764 | /* Allocate glyph matrices over a window tree for a frame-based | |
1765 | redisplay | |
1766 | ||
1767 | X and Y are column/row within the frame glyph matrix where | |
1768 | sub-matrices for the window tree rooted at WINDOW must be | |
1769 | allocated. CH_DIM contains the dimensions of the smallest | |
1770 | character that could be used during display. DIM_ONLY_P non-zero | |
1771 | means that the caller of this function is only interested in the | |
1772 | result matrix dimension, and matrix adjustments should not be | |
1773 | performed. | |
1774 | ||
1775 | The function returns the total width/height of the sub-matrices of | |
1776 | the window tree. If called on a frame root window, the computation | |
1777 | will take the mini-buffer window into account. | |
1778 | ||
1779 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1780 | ||
1781 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1782 | glyph matrices yet, and | |
1783 | ||
1784 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1785 | any window in the tree will be changed or have been changed (see | |
153a073c | 1786 | DIM_ONLY_P) |
5f5c8ee5 GM |
1787 | |
1788 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1789 | function. | |
1790 | ||
1791 | Windows are arranged into chains of windows on the same level | |
1792 | through the next fields of window structures. Such a level can be | |
1793 | either a sequence of horizontally adjacent windows from left to | |
1794 | right, or a sequence of vertically adjacent windows from top to | |
1795 | bottom. Each window in a horizontal sequence can be either a leaf | |
1796 | window or a vertical sequence; a window in a vertical sequence can | |
1797 | be either a leaf or a horizontal sequence. All windows in a | |
1798 | horizontal sequence have the same height, and all windows in a | |
1799 | vertical sequence have the same width. | |
1800 | ||
1801 | This function uses, for historical reasons, a more general | |
1802 | algorithm to determine glyph matrix dimensions that would be | |
1803 | necessary. | |
1804 | ||
1805 | The matrix height of a horizontal sequence is determined by the | |
1806 | maximum height of any matrix in the sequence. The matrix width of | |
1807 | a horizontal sequence is computed by adding up matrix widths of | |
1808 | windows in the sequence. | |
1809 | ||
1810 | |<------- result width ------->| | |
1811 | +---------+----------+---------+ --- | |
1812 | | | | | | | |
1813 | | | | | | |
1814 | +---------+ | | result height | |
1815 | | +---------+ | |
1816 | | | | | |
1817 | +----------+ --- | |
1818 | ||
1819 | The matrix width of a vertical sequence is the maximum matrix width | |
1820 | of any window in the sequence. Its height is computed by adding up | |
1821 | matrix heights of windows in the sequence. | |
1822 | ||
1823 | |<---- result width -->| | |
1824 | +---------+ --- | |
1825 | | | | | |
1826 | | | | | |
1827 | +---------+--+ | | |
1828 | | | | | |
1829 | | | result height | |
1830 | | | | |
1831 | +------------+---------+ | | |
1832 | | | | | |
1833 | | | | | |
1834 | +------------+---------+ --- */ | |
1835 | ||
1836 | /* Bit indicating that a new matrix will be allocated or has been | |
1837 | allocated. */ | |
1838 | ||
1839 | #define NEW_LEAF_MATRIX (1 << 0) | |
1840 | ||
1841 | /* Bit indicating that a matrix will or has changed its location or | |
1842 | size. */ | |
1843 | ||
1844 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1845 | ||
1846 | static struct dim | |
5d3cc43c GM |
1847 | allocate_matrices_for_frame_redisplay (window, x, y, dim_only_p, |
1848 | window_change_flags) | |
5f5c8ee5 GM |
1849 | Lisp_Object window; |
1850 | int x, y; | |
5f5c8ee5 GM |
1851 | int dim_only_p; |
1852 | int *window_change_flags; | |
1853 | { | |
1854 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1855 | int x0 = x, y0 = y; | |
1856 | int wmax = 0, hmax = 0; | |
1857 | struct dim total; | |
1858 | struct dim dim; | |
1859 | struct window *w; | |
1860 | int in_horz_combination_p; | |
1861 | ||
1862 | /* What combination is WINDOW part of? Compute this once since the | |
1863 | result is the same for all windows in the `next' chain. The | |
1864 | special case of a root window (parent equal to nil) is treated | |
1865 | like a vertical combination because a root window's `next' | |
1866 | points to the mini-buffer window, if any, which is arranged | |
1867 | vertically below other windows. */ | |
1868 | in_horz_combination_p | |
1869 | = (!NILP (XWINDOW (window)->parent) | |
1870 | && !NILP (XWINDOW (XWINDOW (window)->parent)->hchild)); | |
1871 | ||
1872 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1873 | do |
5f5c8ee5 GM |
1874 | { |
1875 | w = XWINDOW (window); | |
1876 | ||
1877 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1878 | on whether this is a combination or a leaf window. */ |
5f5c8ee5 | 1879 | if (!NILP (w->hchild)) |
177c0ea7 | 1880 | dim = allocate_matrices_for_frame_redisplay (w->hchild, x, y, |
5f5c8ee5 GM |
1881 | dim_only_p, |
1882 | window_change_flags); | |
1883 | else if (!NILP (w->vchild)) | |
177c0ea7 | 1884 | dim = allocate_matrices_for_frame_redisplay (w->vchild, x, y, |
5f5c8ee5 GM |
1885 | dim_only_p, |
1886 | window_change_flags); | |
1887 | else | |
1888 | { | |
1889 | /* If not already done, allocate sub-matrix structures. */ | |
1890 | if (w->desired_matrix == NULL) | |
1891 | { | |
1892 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1893 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1894 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1895 | } | |
177c0ea7 | 1896 | |
5f5c8ee5 GM |
1897 | /* Width and height MUST be chosen so that there are no |
1898 | holes in the frame matrix. */ | |
5d3cc43c GM |
1899 | dim.width = required_matrix_width (w); |
1900 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1901 | |
1902 | /* Will matrix be re-allocated? */ | |
1903 | if (x != w->desired_matrix->matrix_x | |
1904 | || y != w->desired_matrix->matrix_y | |
1905 | || dim.width != w->desired_matrix->matrix_w | |
1906 | || dim.height != w->desired_matrix->matrix_h | |
1907 | || (margin_glyphs_to_reserve (w, dim.width, | |
7df02016 | 1908 | w->right_margin_cols) |
5f5c8ee5 GM |
1909 | != w->desired_matrix->left_margin_glyphs) |
1910 | || (margin_glyphs_to_reserve (w, dim.width, | |
7df02016 | 1911 | w->left_margin_cols) |
5f5c8ee5 GM |
1912 | != w->desired_matrix->right_margin_glyphs)) |
1913 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1914 | ||
1915 | /* Actually change matrices, if allowed. Do not consider | |
1916 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1917 | may have been changed which we don't now here. We trust | |
1918 | that we only will be called with DIM_ONLY_P != 0 when | |
1919 | necessary. */ | |
1920 | if (!dim_only_p) | |
1921 | { | |
1922 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1923 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1924 | } | |
1925 | } | |
1926 | ||
1927 | /* If we are part of a horizontal combination, advance x for | |
1928 | windows to the right of W; otherwise advance y for windows | |
1929 | below W. */ | |
1930 | if (in_horz_combination_p) | |
1931 | x += dim.width; | |
177c0ea7 | 1932 | else |
5f5c8ee5 GM |
1933 | y += dim.height; |
1934 | ||
1935 | /* Remember maximum glyph matrix dimensions. */ | |
1936 | wmax = max (wmax, dim.width); | |
1937 | hmax = max (hmax, dim.height); | |
1938 | ||
1939 | /* Next window on same level. */ | |
1940 | window = w->next; | |
1941 | } | |
1942 | while (!NILP (window)); | |
1943 | ||
1944 | /* Set `total' to the total glyph matrix dimension of this window | |
1945 | level. In a vertical combination, the width is the width of the | |
1946 | widest window; the height is the y we finally reached, corrected | |
1947 | by the y we started with. In a horizontal combination, the total | |
1948 | height is the height of the tallest window, and the width is the | |
1949 | x we finally reached, corrected by the x we started with. */ | |
1950 | if (in_horz_combination_p) | |
1951 | { | |
1952 | total.width = x - x0; | |
1953 | total.height = hmax; | |
1954 | } | |
177c0ea7 | 1955 | else |
5f5c8ee5 GM |
1956 | { |
1957 | total.width = wmax; | |
1958 | total.height = y - y0; | |
1959 | } | |
1960 | ||
1961 | return total; | |
1962 | } | |
1963 | ||
1964 | ||
5d3cc43c GM |
1965 | /* Return the required height of glyph matrices for window W. */ |
1966 | ||
1967 | int | |
1968 | required_matrix_height (w) | |
1969 | struct window *w; | |
1970 | { | |
1971 | #ifdef HAVE_WINDOW_SYSTEM | |
1972 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 1973 | |
5d3cc43c GM |
1974 | if (FRAME_WINDOW_P (f)) |
1975 | { | |
1976 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1977 | int window_pixel_height = window_box_height (w) + abs (w->vscroll); | |
1978 | return (((window_pixel_height + ch_height - 1) | |
1979 | / ch_height) | |
1980 | /* One partially visible line at the top and | |
1981 | bottom of the window. */ | |
1982 | + 2 | |
153a073c | 1983 | /* 2 for header and mode line. */ |
5d3cc43c GM |
1984 | + 2); |
1985 | } | |
1986 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 1987 | |
7df02016 | 1988 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
1989 | } |
1990 | ||
1991 | ||
1992 | /* Return the required width of glyph matrices for window W. */ | |
1993 | ||
1994 | int | |
1995 | required_matrix_width (w) | |
1996 | struct window *w; | |
1997 | { | |
1998 | #ifdef HAVE_WINDOW_SYSTEM | |
1999 | struct frame *f = XFRAME (w->frame); | |
2000 | if (FRAME_WINDOW_P (f)) | |
2001 | { | |
2002 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 2003 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 2004 | |
5d3cc43c GM |
2005 | /* Compute number of glyphs needed in a glyph row. */ |
2006 | return (((window_pixel_width + ch_width - 1) | |
2007 | / ch_width) | |
2008 | /* 2 partially visible columns in the text area. */ | |
2009 | + 2 | |
2010 | /* One partially visible column at the right | |
2011 | edge of each marginal area. */ | |
2012 | + 1 + 1); | |
2013 | } | |
2014 | #endif /* HAVE_WINDOW_SYSTEM */ | |
2015 | ||
7df02016 | 2016 | return XINT (w->total_cols); |
5d3cc43c GM |
2017 | } |
2018 | ||
2019 | ||
5f5c8ee5 GM |
2020 | /* Allocate window matrices for window-based redisplay. W is the |
2021 | window whose matrices must be allocated/reallocated. CH_DIM is the | |
2022 | size of the smallest character that could potentially be used on W. */ | |
177c0ea7 | 2023 | |
5f5c8ee5 | 2024 | static void |
5d3cc43c | 2025 | allocate_matrices_for_window_redisplay (w) |
5f5c8ee5 | 2026 | struct window *w; |
5f5c8ee5 | 2027 | { |
5f5c8ee5 GM |
2028 | while (w) |
2029 | { | |
2030 | if (!NILP (w->vchild)) | |
5d3cc43c | 2031 | allocate_matrices_for_window_redisplay (XWINDOW (w->vchild)); |
5f5c8ee5 | 2032 | else if (!NILP (w->hchild)) |
5d3cc43c | 2033 | allocate_matrices_for_window_redisplay (XWINDOW (w->hchild)); |
5f5c8ee5 GM |
2034 | else |
2035 | { | |
2036 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
2037 | struct dim dim; |
2038 | ||
2039 | /* If matrices are not yet allocated, allocate them now. */ | |
2040 | if (w->desired_matrix == NULL) | |
2041 | { | |
2042 | w->desired_matrix = new_glyph_matrix (NULL); | |
2043 | w->current_matrix = new_glyph_matrix (NULL); | |
2044 | } | |
2045 | ||
5d3cc43c GM |
2046 | dim.width = required_matrix_width (w); |
2047 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
2048 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
2049 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
2050 | } | |
177c0ea7 | 2051 | |
5f5c8ee5 GM |
2052 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
2053 | } | |
2054 | } | |
2055 | ||
2056 | ||
2057 | /* Re-allocate/ re-compute glyph matrices on frame F. If F is null, | |
2058 | do it for all frames; otherwise do it just for the given frame. | |
2059 | This function must be called when a new frame is created, its size | |
2060 | changes, or its window configuration changes. */ | |
2061 | ||
2062 | void | |
2063 | adjust_glyphs (f) | |
2064 | struct frame *f; | |
2065 | { | |
408f5064 GM |
2066 | /* Block input so that expose events and other events that access |
2067 | glyph matrices are not processed while we are changing them. */ | |
2068 | BLOCK_INPUT; | |
2069 | ||
5f5c8ee5 GM |
2070 | if (f) |
2071 | adjust_frame_glyphs (f); | |
2072 | else | |
2073 | { | |
2074 | Lisp_Object tail, lisp_frame; | |
177c0ea7 | 2075 | |
5f5c8ee5 GM |
2076 | FOR_EACH_FRAME (tail, lisp_frame) |
2077 | adjust_frame_glyphs (XFRAME (lisp_frame)); | |
2078 | } | |
408f5064 GM |
2079 | |
2080 | UNBLOCK_INPUT; | |
5f5c8ee5 GM |
2081 | } |
2082 | ||
2083 | ||
2084 | /* Adjust frame glyphs when Emacs is initialized. | |
177c0ea7 JB |
2085 | |
2086 | To be called from init_display. | |
2087 | ||
5f5c8ee5 GM |
2088 | We need a glyph matrix because redraw will happen soon. |
2089 | Unfortunately, window sizes on selected_frame are not yet set to | |
2090 | meaningful values. I believe we can assume that there are only two | |
2091 | windows on the frame---the mini-buffer and the root window. Frame | |
2092 | height and width seem to be correct so far. So, set the sizes of | |
2093 | windows to estimated values. */ | |
2094 | ||
2095 | static void | |
2096 | adjust_frame_glyphs_initially () | |
2097 | { | |
91fb7e1b GM |
2098 | struct frame *sf = SELECTED_FRAME (); |
2099 | struct window *root = XWINDOW (sf->root_window); | |
5f5c8ee5 | 2100 | struct window *mini = XWINDOW (root->next); |
7df02016 KS |
2101 | int frame_lines = FRAME_LINES (sf); |
2102 | int frame_cols = FRAME_COLS (sf); | |
91fb7e1b | 2103 | int top_margin = FRAME_TOP_MARGIN (sf); |
5f5c8ee5 GM |
2104 | |
2105 | /* Do it for the root window. */ | |
7df02016 KS |
2106 | XSETFASTINT (root->top_line, top_margin); |
2107 | XSETFASTINT (root->total_cols, frame_cols); | |
2108 | set_window_height (sf->root_window, frame_lines - 1 - top_margin, 0); | |
5f5c8ee5 GM |
2109 | |
2110 | /* Do it for the mini-buffer window. */ | |
7df02016 KS |
2111 | XSETFASTINT (mini->top_line, frame_lines - 1); |
2112 | XSETFASTINT (mini->total_cols, frame_cols); | |
5f5c8ee5 GM |
2113 | set_window_height (root->next, 1, 0); |
2114 | ||
91fb7e1b | 2115 | adjust_frame_glyphs (sf); |
5f5c8ee5 GM |
2116 | glyphs_initialized_initially_p = 1; |
2117 | } | |
177c0ea7 | 2118 | |
5f5c8ee5 GM |
2119 | |
2120 | /* Allocate/reallocate glyph matrices of a single frame F. */ | |
2121 | ||
2122 | static void | |
2123 | adjust_frame_glyphs (f) | |
2124 | struct frame *f; | |
2125 | { | |
2126 | if (FRAME_WINDOW_P (f)) | |
2127 | adjust_frame_glyphs_for_window_redisplay (f); | |
2128 | else | |
2129 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 2130 | |
5f5c8ee5 GM |
2131 | /* Don't forget the message buffer and the buffer for |
2132 | decode_mode_spec. */ | |
2133 | adjust_frame_message_buffer (f); | |
2134 | adjust_decode_mode_spec_buffer (f); | |
2135 | ||
2136 | f->glyphs_initialized_p = 1; | |
2137 | } | |
2138 | ||
2139 | ||
c9f00270 GM |
2140 | /* In the window tree with root W, build current matrices of leaf |
2141 | windows from the frame's current matrix. */ | |
2142 | ||
2143 | static void | |
2144 | fake_current_matrices (window) | |
2145 | Lisp_Object window; | |
2146 | { | |
2147 | struct window *w; | |
177c0ea7 | 2148 | |
c9f00270 GM |
2149 | for (; !NILP (window); window = w->next) |
2150 | { | |
2151 | w = XWINDOW (window); | |
177c0ea7 | 2152 | |
c9f00270 GM |
2153 | if (!NILP (w->hchild)) |
2154 | fake_current_matrices (w->hchild); | |
2155 | else if (!NILP (w->vchild)) | |
2156 | fake_current_matrices (w->vchild); | |
2157 | else | |
2158 | { | |
2159 | int i; | |
2160 | struct frame *f = XFRAME (w->frame); | |
2161 | struct glyph_matrix *m = w->current_matrix; | |
2162 | struct glyph_matrix *fm = f->current_matrix; | |
2163 | ||
7df02016 KS |
2164 | xassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
2165 | xassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 2166 | |
c9f00270 GM |
2167 | for (i = 0; i < m->matrix_h; ++i) |
2168 | { | |
2169 | struct glyph_row *r = m->rows + i; | |
7df02016 | 2170 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 GM |
2171 | |
2172 | xassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] | |
2173 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); | |
2174 | ||
2175 | r->enabled_p = fr->enabled_p; | |
2176 | if (r->enabled_p) | |
2177 | { | |
2178 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
2179 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
2180 | r->used[TEXT_AREA] = (m->matrix_w | |
2181 | - r->used[LEFT_MARGIN_AREA] | |
2182 | - r->used[RIGHT_MARGIN_AREA]); | |
2183 | r->mode_line_p = 0; | |
c9f00270 GM |
2184 | } |
2185 | } | |
2186 | } | |
2187 | } | |
2188 | } | |
2189 | ||
2190 | ||
bccee4f2 | 2191 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 2192 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 2193 | |
bccee4f2 GM |
2194 | static struct glyph_matrix * |
2195 | save_current_matrix (f) | |
31798cfe | 2196 | struct frame *f; |
c9f00270 | 2197 | { |
bccee4f2 GM |
2198 | int i; |
2199 | struct glyph_matrix *saved; | |
e797dea6 | 2200 | |
bccee4f2 GM |
2201 | saved = (struct glyph_matrix *) xmalloc (sizeof *saved); |
2202 | bzero (saved, sizeof *saved); | |
2203 | saved->nrows = f->current_matrix->nrows; | |
2204 | saved->rows = (struct glyph_row *) xmalloc (saved->nrows | |
2205 | * sizeof *saved->rows); | |
2206 | bzero (saved->rows, saved->nrows * sizeof *saved->rows); | |
2207 | ||
2208 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 2209 | { |
bccee4f2 GM |
2210 | struct glyph_row *from = f->current_matrix->rows + i; |
2211 | struct glyph_row *to = saved->rows + i; | |
2212 | size_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); | |
2213 | to->glyphs[TEXT_AREA] = (struct glyph *) xmalloc (nbytes); | |
2214 | bcopy (from->glyphs[TEXT_AREA], to->glyphs[TEXT_AREA], nbytes); | |
2215 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; | |
e797dea6 | 2216 | } |
bccee4f2 GM |
2217 | |
2218 | return saved; | |
2219 | } | |
2220 | ||
2221 | ||
2222 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
2223 | and free memory associated with SAVED. */ | |
2224 | ||
2225 | static void | |
2226 | restore_current_matrix (f, saved) | |
2227 | struct frame *f; | |
2228 | struct glyph_matrix *saved; | |
2229 | { | |
2230 | int i; | |
2231 | ||
2232 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 2233 | { |
bccee4f2 GM |
2234 | struct glyph_row *from = saved->rows + i; |
2235 | struct glyph_row *to = f->current_matrix->rows + i; | |
e797dea6 GM |
2236 | size_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
2237 | bcopy (from->glyphs[TEXT_AREA], to->glyphs[TEXT_AREA], nbytes); | |
2238 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; | |
bccee4f2 | 2239 | xfree (from->glyphs[TEXT_AREA]); |
e797dea6 | 2240 | } |
177c0ea7 | 2241 | |
bccee4f2 GM |
2242 | xfree (saved->rows); |
2243 | xfree (saved); | |
c9f00270 GM |
2244 | } |
2245 | ||
2246 | ||
bccee4f2 | 2247 | |
5f5c8ee5 GM |
2248 | /* Allocate/reallocate glyph matrices of a single frame F for |
2249 | frame-based redisplay. */ | |
2250 | ||
2251 | static void | |
2252 | adjust_frame_glyphs_for_frame_redisplay (f) | |
2253 | struct frame *f; | |
2254 | { | |
2255 | struct dim ch_dim; | |
2256 | struct dim matrix_dim; | |
2257 | int pool_changed_p; | |
2258 | int window_change_flags; | |
2259 | int top_window_y; | |
2260 | ||
2261 | if (!FRAME_LIVE_P (f)) | |
2262 | return; | |
2263 | ||
2264 | /* Determine the smallest character in any font for F. On | |
2265 | console windows, all characters have dimension (1, 1). */ | |
2266 | ch_dim.width = ch_dim.height = 1; | |
177c0ea7 | 2267 | |
5f5c8ee5 GM |
2268 | top_window_y = FRAME_TOP_MARGIN (f); |
2269 | ||
2270 | /* Allocate glyph pool structures if not already done. */ | |
2271 | if (f->desired_pool == NULL) | |
2272 | { | |
2273 | f->desired_pool = new_glyph_pool (); | |
2274 | f->current_pool = new_glyph_pool (); | |
2275 | } | |
2276 | ||
2277 | /* Allocate frames matrix structures if needed. */ | |
2278 | if (f->desired_matrix == NULL) | |
2279 | { | |
2280 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
2281 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
2282 | } | |
177c0ea7 | 2283 | |
5f5c8ee5 GM |
2284 | /* Compute window glyph matrices. (This takes the mini-buffer |
2285 | window into account). The result is the size of the frame glyph | |
2286 | matrix needed. The variable window_change_flags is set to a bit | |
2287 | mask indicating whether new matrices will be allocated or | |
2288 | existing matrices change their size or location within the frame | |
2289 | matrix. */ | |
2290 | window_change_flags = 0; | |
2291 | matrix_dim | |
2292 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
2293 | 0, top_window_y, | |
5d3cc43c | 2294 | 1, |
5f5c8ee5 GM |
2295 | &window_change_flags); |
2296 | ||
2297 | /* Add in menu bar lines, if any. */ | |
2298 | matrix_dim.height += top_window_y; | |
2299 | ||
2300 | /* Enlarge pools as necessary. */ | |
2301 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
2302 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
2303 | ||
177c0ea7 | 2304 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
2305 | absolutely necessary since it requires a frame redraw. */ |
2306 | if (pool_changed_p || window_change_flags) | |
2307 | { | |
2308 | /* Do it for window matrices. */ | |
2309 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 2310 | 0, top_window_y, 0, |
5f5c8ee5 GM |
2311 | &window_change_flags); |
2312 | ||
2313 | /* Size of frame matrices must equal size of frame. Note | |
2314 | that we are called for X frames with window widths NOT equal | |
2315 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
7df02016 KS |
2316 | xassert (matrix_dim.width == FRAME_COLS (f) |
2317 | && matrix_dim.height == FRAME_LINES (f)); | |
177c0ea7 | 2318 | |
e797dea6 GM |
2319 | /* Pointers to glyph memory in glyph rows are exchanged during |
2320 | the update phase of redisplay, which means in general that a | |
2321 | frame's current matrix consists of pointers into both the | |
2322 | desired and current glyph pool of the frame. Adjusting a | |
2323 | matrix sets the frame matrix up so that pointers are all into | |
2324 | the same pool. If we want to preserve glyph contents of the | |
2325 | current matrix over a call to adjust_glyph_matrix, we must | |
2326 | make a copy of the current glyphs, and restore the current | |
2327 | matrix' contents from that copy. */ | |
2328 | if (display_completed | |
2329 | && !FRAME_GARBAGED_P (f) | |
2330 | && matrix_dim.width == f->current_matrix->matrix_w | |
2331 | && matrix_dim.height == f->current_matrix->matrix_h) | |
2332 | { | |
bccee4f2 GM |
2333 | struct glyph_matrix *copy = save_current_matrix (f); |
2334 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2335 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2336 | restore_current_matrix (f, copy); |
e797dea6 GM |
2337 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2338 | } | |
c9f00270 | 2339 | else |
e797dea6 | 2340 | { |
bccee4f2 | 2341 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2342 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2343 | SET_FRAME_GARBAGED (f); | |
2344 | } | |
5f5c8ee5 GM |
2345 | } |
2346 | } | |
2347 | ||
2348 | ||
2349 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2350 | window-based redisplay. */ | |
2351 | ||
2352 | static void | |
2353 | adjust_frame_glyphs_for_window_redisplay (f) | |
2354 | struct frame *f; | |
2355 | { | |
2356 | struct dim ch_dim; | |
2357 | struct window *w; | |
2358 | ||
2359 | xassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); | |
177c0ea7 | 2360 | |
5f5c8ee5 GM |
2361 | /* Get minimum sizes. */ |
2362 | #ifdef HAVE_WINDOW_SYSTEM | |
2363 | ch_dim.width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
2364 | ch_dim.height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
2365 | #else | |
2366 | ch_dim.width = ch_dim.height = 1; | |
2367 | #endif | |
177c0ea7 | 2368 | |
5f5c8ee5 | 2369 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2370 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
2371 | |
2372 | /* Allocate/ reallocate matrices of the dummy window used to display | |
2373 | the menu bar under X when no X toolkit support is available. */ | |
488dd4c4 | 2374 | #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2375 | { |
2376 | /* Allocate a dummy window if not already done. */ | |
2377 | if (NILP (f->menu_bar_window)) | |
2378 | { | |
2379 | f->menu_bar_window = make_window (); | |
2380 | w = XWINDOW (f->menu_bar_window); | |
2381 | XSETFRAME (w->frame, f); | |
2382 | w->pseudo_window_p = 1; | |
2383 | } | |
2384 | else | |
2385 | w = XWINDOW (f->menu_bar_window); | |
2386 | ||
2387 | /* Set window dimensions to frame dimensions and allocate or | |
2388 | adjust glyph matrices of W. */ | |
7df02016 KS |
2389 | XSETFASTINT (w->top_line, 0); |
2390 | XSETFASTINT (w->left_col, 0); | |
2391 | XSETFASTINT (w->total_lines, FRAME_MENU_BAR_LINES (f)); | |
2392 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
5d3cc43c | 2393 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 GM |
2394 | } |
2395 | #endif /* not USE_X_TOOLKIT */ | |
2396 | ||
488dd4c4 | 2397 | #ifndef USE_GTK |
9ea173e8 GM |
2398 | /* Allocate/ reallocate matrices of the tool bar window. If we |
2399 | don't have a tool bar window yet, make one. */ | |
2400 | if (NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2401 | { |
9ea173e8 GM |
2402 | f->tool_bar_window = make_window (); |
2403 | w = XWINDOW (f->tool_bar_window); | |
5f5c8ee5 GM |
2404 | XSETFRAME (w->frame, f); |
2405 | w->pseudo_window_p = 1; | |
2406 | } | |
2407 | else | |
9ea173e8 | 2408 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2409 | |
7df02016 KS |
2410 | XSETFASTINT (w->top_line, FRAME_MENU_BAR_LINES (f)); |
2411 | XSETFASTINT (w->left_col, 0); | |
2412 | XSETFASTINT (w->total_lines, FRAME_TOOL_BAR_LINES (f)); | |
2413 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
5d3cc43c | 2414 | allocate_matrices_for_window_redisplay (w); |
488dd4c4 | 2415 | #endif |
5f5c8ee5 GM |
2416 | } |
2417 | ||
2418 | ||
177c0ea7 | 2419 | /* Adjust/ allocate message buffer of frame F. |
5f5c8ee5 | 2420 | |
5f5c8ee5 GM |
2421 | Note that the message buffer is never freed. Since I could not |
2422 | find a free in 19.34, I assume that freeing it would be | |
2423 | problematic in some way and don't do it either. | |
2424 | ||
2425 | (Implementation note: It should be checked if we can free it | |
2426 | eventually without causing trouble). */ | |
2427 | ||
2428 | static void | |
2429 | adjust_frame_message_buffer (f) | |
2430 | struct frame *f; | |
2431 | { | |
2432 | int size = FRAME_MESSAGE_BUF_SIZE (f) + 1; | |
2433 | ||
2434 | if (FRAME_MESSAGE_BUF (f)) | |
2435 | { | |
2436 | char *buffer = FRAME_MESSAGE_BUF (f); | |
2437 | char *new_buffer = (char *) xrealloc (buffer, size); | |
5f5c8ee5 GM |
2438 | FRAME_MESSAGE_BUF (f) = new_buffer; |
2439 | } | |
2440 | else | |
2441 | FRAME_MESSAGE_BUF (f) = (char *) xmalloc (size); | |
2442 | } | |
2443 | ||
2444 | ||
2445 | /* Re-allocate buffer for decode_mode_spec on frame F. */ | |
2446 | ||
2447 | static void | |
2448 | adjust_decode_mode_spec_buffer (f) | |
2449 | struct frame *f; | |
2450 | { | |
2451 | f->decode_mode_spec_buffer | |
2452 | = (char *) xrealloc (f->decode_mode_spec_buffer, | |
2453 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
2454 | } | |
2455 | ||
2456 | ||
2457 | \f | |
2458 | /********************************************************************** | |
2459 | Freeing Glyph Matrices | |
2460 | **********************************************************************/ | |
2461 | ||
2462 | /* Free glyph memory for a frame F. F may be null. This function can | |
2463 | be called for the same frame more than once. The root window of | |
2464 | F may be nil when this function is called. This is the case when | |
2465 | the function is called when F is destroyed. */ | |
2466 | ||
2467 | void | |
2468 | free_glyphs (f) | |
2469 | struct frame *f; | |
2470 | { | |
2471 | if (f && f->glyphs_initialized_p) | |
2472 | { | |
42f55fe0 GM |
2473 | /* Block interrupt input so that we don't get surprised by an X |
2474 | event while we're in an inconsistent state. */ | |
2475 | BLOCK_INPUT; | |
5f5c8ee5 | 2476 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2477 | |
5f5c8ee5 GM |
2478 | /* Release window sub-matrices. */ |
2479 | if (!NILP (f->root_window)) | |
2480 | free_window_matrices (XWINDOW (f->root_window)); | |
2481 | ||
2482 | /* Free the dummy window for menu bars without X toolkit and its | |
2483 | glyph matrices. */ | |
2484 | if (!NILP (f->menu_bar_window)) | |
2485 | { | |
2486 | struct window *w = XWINDOW (f->menu_bar_window); | |
2487 | free_glyph_matrix (w->desired_matrix); | |
2488 | free_glyph_matrix (w->current_matrix); | |
2489 | w->desired_matrix = w->current_matrix = NULL; | |
2490 | f->menu_bar_window = Qnil; | |
2491 | } | |
2492 | ||
9ea173e8 GM |
2493 | /* Free the tool bar window and its glyph matrices. */ |
2494 | if (!NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2495 | { |
9ea173e8 | 2496 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2497 | free_glyph_matrix (w->desired_matrix); |
2498 | free_glyph_matrix (w->current_matrix); | |
2499 | w->desired_matrix = w->current_matrix = NULL; | |
9ea173e8 | 2500 | f->tool_bar_window = Qnil; |
5f5c8ee5 GM |
2501 | } |
2502 | ||
2503 | /* Release frame glyph matrices. Reset fields to zero in | |
2504 | case we are called a second time. */ | |
2505 | if (f->desired_matrix) | |
2506 | { | |
2507 | free_glyph_matrix (f->desired_matrix); | |
2508 | free_glyph_matrix (f->current_matrix); | |
2509 | f->desired_matrix = f->current_matrix = NULL; | |
2510 | } | |
2511 | ||
2512 | /* Release glyph pools. */ | |
2513 | if (f->desired_pool) | |
2514 | { | |
2515 | free_glyph_pool (f->desired_pool); | |
2516 | free_glyph_pool (f->current_pool); | |
2517 | f->desired_pool = f->current_pool = NULL; | |
2518 | } | |
177c0ea7 | 2519 | |
42f55fe0 | 2520 | UNBLOCK_INPUT; |
5f5c8ee5 GM |
2521 | } |
2522 | } | |
2523 | ||
2524 | ||
2525 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2526 | function may be called with a null pointer, and it may be called on | |
2527 | the same tree more than once. */ | |
2528 | ||
2529 | void | |
2530 | free_window_matrices (w) | |
2531 | struct window *w; | |
2532 | { | |
2533 | while (w) | |
2534 | { | |
2535 | if (!NILP (w->hchild)) | |
2536 | free_window_matrices (XWINDOW (w->hchild)); | |
2537 | else if (!NILP (w->vchild)) | |
2538 | free_window_matrices (XWINDOW (w->vchild)); | |
177c0ea7 | 2539 | else |
5f5c8ee5 GM |
2540 | { |
2541 | /* This is a leaf window. Free its memory and reset fields | |
2542 | to zero in case this function is called a second time for | |
2543 | W. */ | |
2544 | free_glyph_matrix (w->current_matrix); | |
2545 | free_glyph_matrix (w->desired_matrix); | |
2546 | w->current_matrix = w->desired_matrix = NULL; | |
2547 | } | |
2548 | ||
2549 | /* Next window on same level. */ | |
2550 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2551 | } | |
2552 | } | |
2553 | ||
2554 | ||
2555 | /* Check glyph memory leaks. This function is called from | |
2556 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2557 | exits. We therefore free all glyph memory for all active frames | |
2558 | explicitly and check that nothing is left allocated. */ | |
2559 | ||
2560 | void | |
2561 | check_glyph_memory () | |
2562 | { | |
2563 | Lisp_Object tail, frame; | |
2564 | ||
2565 | /* Free glyph memory for all frames. */ | |
2566 | FOR_EACH_FRAME (tail, frame) | |
2567 | free_glyphs (XFRAME (frame)); | |
2568 | ||
2569 | /* Check that nothing is left allocated. */ | |
2570 | if (glyph_matrix_count) | |
2571 | abort (); | |
2572 | if (glyph_pool_count) | |
2573 | abort (); | |
2574 | } | |
2575 | ||
2576 | ||
2577 | \f | |
2578 | /********************************************************************** | |
2579 | Building a Frame Matrix | |
2580 | **********************************************************************/ | |
2581 | ||
2582 | /* Most of the redisplay code works on glyph matrices attached to | |
2583 | windows. This is a good solution most of the time, but it is not | |
2584 | suitable for terminal code. Terminal output functions cannot rely | |
2585 | on being able to set an arbitrary terminal window. Instead they | |
2586 | must be provided with a view of the whole frame, i.e. the whole | |
2587 | screen. We build such a view by constructing a frame matrix from | |
2588 | window matrices in this section. | |
2589 | ||
2590 | Windows that must be updated have their must_be_update_p flag set. | |
2591 | For all such windows, their desired matrix is made part of the | |
2592 | desired frame matrix. For other windows, their current matrix is | |
2593 | made part of the desired frame matrix. | |
2594 | ||
2595 | +-----------------+----------------+ | |
2596 | | desired | desired | | |
2597 | | | | | |
2598 | +-----------------+----------------+ | |
2599 | | current | | |
2600 | | | | |
2601 | +----------------------------------+ | |
2602 | ||
2603 | Desired window matrices can be made part of the frame matrix in a | |
2604 | cheap way: We exploit the fact that the desired frame matrix and | |
2605 | desired window matrices share their glyph memory. This is not | |
2606 | possible for current window matrices. Their glyphs are copied to | |
2607 | the desired frame matrix. The latter is equivalent to | |
2608 | preserve_other_columns in the old redisplay. | |
2609 | ||
2610 | Used glyphs counters for frame matrix rows are the result of adding | |
2611 | up glyph lengths of the window matrices. A line in the frame | |
2612 | matrix is enabled, if a corresponding line in a window matrix is | |
2613 | enabled. | |
177c0ea7 | 2614 | |
5f5c8ee5 GM |
2615 | After building the desired frame matrix, it will be passed to |
2616 | terminal code, which will manipulate both the desired and current | |
2617 | frame matrix. Changes applied to the frame's current matrix have | |
2618 | to be visible in current window matrices afterwards, of course. | |
2619 | ||
2620 | This problem is solved like this: | |
2621 | ||
2622 | 1. Window and frame matrices share glyphs. Window matrices are | |
2623 | constructed in a way that their glyph contents ARE the glyph | |
2624 | contents needed in a frame matrix. Thus, any modification of | |
2625 | glyphs done in terminal code will be reflected in window matrices | |
2626 | automatically. | |
177c0ea7 | 2627 | |
5f5c8ee5 GM |
2628 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2629 | intercepted by hook functions so that corresponding row operations | |
2630 | on window matrices can be performed. This is necessary because we | |
2631 | use pointers to glyphs in glyph row structures. To satisfy the | |
2632 | assumption of point 1 above that glyphs are updated implicitly in | |
2633 | window matrices when they are manipulated via the frame matrix, | |
2634 | window and frame matrix must of course agree where to find the | |
2635 | glyphs for their rows. Possible manipulations that must be | |
2636 | mirrored are assignments of rows of the desired frame matrix to the | |
2637 | current frame matrix and scrolling the current frame matrix. */ | |
2638 | ||
2639 | /* Build frame F's desired matrix from window matrices. Only windows | |
2640 | which have the flag must_be_updated_p set have to be updated. Menu | |
2641 | bar lines of a frame are not covered by window matrices, so make | |
2642 | sure not to touch them in this function. */ | |
2643 | ||
2644 | static void | |
2645 | build_frame_matrix (f) | |
2646 | struct frame *f; | |
2647 | { | |
2648 | int i; | |
2649 | ||
2650 | /* F must have a frame matrix when this function is called. */ | |
2651 | xassert (!FRAME_WINDOW_P (f)); | |
177c0ea7 | 2652 | |
5f5c8ee5 GM |
2653 | /* Clear all rows in the frame matrix covered by window matrices. |
2654 | Menu bar lines are not covered by windows. */ | |
2655 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2656 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2657 | ||
2658 | /* Build the matrix by walking the window tree. */ | |
2659 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2660 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2661 | } | |
2662 | ||
2663 | ||
2664 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2665 | matrices. W is the root of a window tree. */ | |
2666 | ||
2667 | static void | |
2668 | build_frame_matrix_from_window_tree (matrix, w) | |
2669 | struct glyph_matrix *matrix; | |
2670 | struct window *w; | |
2671 | { | |
2672 | while (w) | |
2673 | { | |
2674 | if (!NILP (w->hchild)) | |
2675 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->hchild)); | |
2676 | else if (!NILP (w->vchild)) | |
2677 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->vchild)); | |
2678 | else | |
2679 | build_frame_matrix_from_leaf_window (matrix, w); | |
2680 | ||
2681 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2682 | } | |
2683 | } | |
2684 | ||
2685 | ||
2686 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2687 | desired frame matrix built. W is a leaf window whose desired or | |
2688 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2689 | must_be_updated_p determines which matrix it contributes to | |
2690 | FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix | |
2691 | is added to FRAME_MATRIX, otherwise W's current matrix is added. | |
2692 | Adding a desired matrix means setting up used counters and such in | |
2693 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2694 | means copying glyphs. The latter case corresponds to | |
2695 | preserve_other_columns in the old redisplay. */ | |
2696 | ||
2697 | static void | |
2698 | build_frame_matrix_from_leaf_window (frame_matrix, w) | |
2699 | struct glyph_matrix *frame_matrix; | |
2700 | struct window *w; | |
2701 | { | |
2702 | struct glyph_matrix *window_matrix; | |
2703 | int window_y, frame_y; | |
2704 | /* If non-zero, a glyph to insert at the right border of W. */ | |
2705 | GLYPH right_border_glyph = 0; | |
2706 | ||
2707 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2708 | if (w->must_be_updated_p) | |
2709 | { | |
2710 | window_matrix = w->desired_matrix; | |
2711 | ||
2712 | /* Decide whether we want to add a vertical border glyph. */ | |
2713 | if (!WINDOW_RIGHTMOST_P (w)) | |
2714 | { | |
2715 | struct Lisp_Char_Table *dp = window_display_table (w); | |
2716 | right_border_glyph = (dp && INTEGERP (DISP_BORDER_GLYPH (dp)) | |
2717 | ? XINT (DISP_BORDER_GLYPH (dp)) | |
2718 | : '|'); | |
2719 | } | |
2720 | } | |
2721 | else | |
2722 | window_matrix = w->current_matrix; | |
2723 | ||
2724 | /* For all rows in the window matrix and corresponding rows in the | |
2725 | frame matrix. */ | |
2726 | window_y = 0; | |
2727 | frame_y = window_matrix->matrix_y; | |
2728 | while (window_y < window_matrix->nrows) | |
2729 | { | |
2730 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2731 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
2a8bd25f | 2732 | int current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2733 | |
2734 | /* Fill up the frame row with spaces up to the left margin of the | |
2735 | window row. */ | |
2736 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2737 | ||
2738 | /* Fill up areas in the window matrix row with spaces. */ | |
2739 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2740 | |
2741 | /* If only part of W's desired matrix has been built, and | |
2742 | window_row wasn't displayed, use the corresponding current | |
2743 | row instead. */ | |
2744 | if (window_matrix == w->desired_matrix | |
2745 | && !window_row->enabled_p) | |
2746 | { | |
2747 | window_row = w->current_matrix->rows + window_y; | |
2748 | current_row_p = 1; | |
2749 | } | |
177c0ea7 | 2750 | |
2a8bd25f | 2751 | if (current_row_p) |
5f5c8ee5 | 2752 | { |
2a8bd25f | 2753 | /* Copy window row to frame row. */ |
5f5c8ee5 GM |
2754 | bcopy (window_row->glyphs[0], |
2755 | frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, | |
2756 | window_matrix->matrix_w * sizeof (struct glyph)); | |
2757 | } | |
2758 | else | |
2759 | { | |
2a8bd25f | 2760 | xassert (window_row->enabled_p); |
177c0ea7 | 2761 | |
2a8bd25f GM |
2762 | /* Only when a desired row has been displayed, we want |
2763 | the corresponding frame row to be updated. */ | |
2764 | frame_row->enabled_p = 1; | |
177c0ea7 | 2765 | |
5f5c8ee5 GM |
2766 | /* Maybe insert a vertical border between horizontally adjacent |
2767 | windows. */ | |
2768 | if (right_border_glyph) | |
2769 | { | |
2770 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2771 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2772 | } | |
2773 | ||
a13396c9 GM |
2774 | /* Window row window_y must be a slice of frame row |
2775 | frame_y. */ | |
5f5c8ee5 | 2776 | xassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2777 | |
5f5c8ee5 GM |
2778 | /* If rows are in sync, we don't have to copy glyphs because |
2779 | frame and window share glyphs. */ | |
177c0ea7 | 2780 | |
a38634ff GM |
2781 | #if GLYPH_DEBUG |
2782 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
9b0e97aa | 2783 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2784 | #endif |
5f5c8ee5 GM |
2785 | } |
2786 | ||
2787 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2788 | up with spaces, and visit leaf windows from left to right it | |
2789 | can be done simply. */ | |
177c0ea7 | 2790 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2791 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2792 | ||
5f5c8ee5 GM |
2793 | /* Next row. */ |
2794 | ++window_y; | |
2795 | ++frame_y; | |
2796 | } | |
2797 | } | |
2798 | ||
2799 | ||
2800 | /* Add spaces to a glyph row ROW in a window matrix. | |
2801 | ||
2802 | Each row has the form: | |
2803 | ||
2804 | +---------+-----------------------------+------------+ | |
2805 | | left | text | right | | |
2806 | +---------+-----------------------------+------------+ | |
2807 | ||
2808 | Left and right marginal areas are optional. This function adds | |
2809 | spaces to areas so that there are no empty holes between areas. | |
2810 | In other words: If the right area is not empty, the text area | |
2811 | is filled up with spaces up to the right area. If the text area | |
2812 | is not empty, the left area is filled up. | |
2813 | ||
2814 | To be called for frame-based redisplay, only. */ | |
2815 | ||
2816 | static void | |
2817 | fill_up_glyph_row_with_spaces (row) | |
2818 | struct glyph_row *row; | |
2819 | { | |
2820 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2821 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2822 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2823 | } | |
2824 | ||
2825 | ||
2826 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2827 | frame-based redisplay only. */ | |
2828 | ||
2829 | static void | |
2830 | fill_up_glyph_row_area_with_spaces (row, area) | |
2831 | struct glyph_row *row; | |
2832 | int area; | |
2833 | { | |
2834 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2835 | { | |
2836 | struct glyph *end = row->glyphs[area + 1]; | |
2837 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2838 | ||
2839 | while (text < end) | |
2840 | *text++ = space_glyph; | |
2841 | row->used[area] = text - row->glyphs[area]; | |
2842 | } | |
2843 | } | |
2844 | ||
2845 | ||
2846 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2847 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2848 | ||
2849 | static void | |
2850 | fill_up_frame_row_with_spaces (row, upto) | |
2851 | struct glyph_row *row; | |
2852 | int upto; | |
2853 | { | |
2854 | int i = row->used[TEXT_AREA]; | |
2855 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2856 | |
5f5c8ee5 GM |
2857 | while (i < upto) |
2858 | glyph[i++] = space_glyph; | |
2859 | ||
2860 | row->used[TEXT_AREA] = i; | |
2861 | } | |
2862 | ||
2863 | ||
2864 | \f | |
2865 | /********************************************************************** | |
2866 | Mirroring operations on frame matrices in window matrices | |
2867 | **********************************************************************/ | |
2868 | ||
2869 | /* Set frame being updated via frame-based redisplay to F. This | |
2870 | function must be called before updates to make explicit that we are | |
2871 | working on frame matrices or not. */ | |
2872 | ||
2873 | static INLINE void | |
2874 | set_frame_matrix_frame (f) | |
2875 | struct frame *f; | |
2876 | { | |
2877 | frame_matrix_frame = f; | |
2878 | } | |
2879 | ||
2880 | ||
2881 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2882 | DESIRED_MATRIX is the desired matrix corresponding to | |
2883 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2884 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2885 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2886 | done in frame matrices, and that we have to perform analogous | |
2887 | operations in window matrices of frame_matrix_frame. */ | |
2888 | ||
2889 | static INLINE void | |
2890 | make_current (desired_matrix, current_matrix, row) | |
2891 | struct glyph_matrix *desired_matrix, *current_matrix; | |
2892 | int row; | |
2893 | { | |
2894 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2895 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
e876ff42 | 2896 | int mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2897 | |
2898 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2899 | between both rows, and does a structure assignment otherwise. */ | |
2900 | assign_row (current_row, desired_row); | |
2901 | ||
2902 | /* Enable current_row to mark it as valid. */ | |
2903 | current_row->enabled_p = 1; | |
e876ff42 | 2904 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2905 | |
2906 | /* If we are called on frame matrices, perform analogous operations | |
2907 | for window matrices. */ | |
2908 | if (frame_matrix_frame) | |
2909 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); | |
2910 | } | |
2911 | ||
2912 | ||
2913 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2914 | W's frame which has been made current (by swapping pointers between | |
2915 | current and desired matrix). Perform analogous operations in the | |
2916 | matrices of leaf windows in the window tree rooted at W. */ | |
2917 | ||
2918 | static void | |
2919 | mirror_make_current (w, frame_row) | |
2920 | struct window *w; | |
2921 | int frame_row; | |
2922 | { | |
2923 | while (w) | |
2924 | { | |
2925 | if (!NILP (w->hchild)) | |
2926 | mirror_make_current (XWINDOW (w->hchild), frame_row); | |
2927 | else if (!NILP (w->vchild)) | |
2928 | mirror_make_current (XWINDOW (w->vchild), frame_row); | |
2929 | else | |
2930 | { | |
2931 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2932 | here because the checks performed in debug mode there | |
2933 | will not allow the conversion. */ | |
2934 | int row = frame_row - w->desired_matrix->matrix_y; | |
2935 | ||
2936 | /* If FRAME_ROW is within W, assign the desired row to the | |
2937 | current row (exchanging glyph pointers). */ | |
2938 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
2939 | { | |
2940 | struct glyph_row *current_row | |
2941 | = MATRIX_ROW (w->current_matrix, row); | |
2942 | struct glyph_row *desired_row | |
2943 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
2944 | |
2945 | if (desired_row->enabled_p) | |
2946 | assign_row (current_row, desired_row); | |
2947 | else | |
2948 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 GM |
2949 | current_row->enabled_p = 1; |
2950 | } | |
2951 | } | |
177c0ea7 | 2952 | |
5f5c8ee5 GM |
2953 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2954 | } | |
2955 | } | |
2956 | ||
2957 | ||
2958 | /* Perform row dance after scrolling. We are working on the range of | |
2959 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
2960 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
2961 | row I in the range 0 <= I < NLINES, the index of the original line | |
2962 | to move to I. This index is relative to the row range, i.e. 0 <= | |
2963 | index < NLINES. RETAINED_P is a vector containing zero for each | |
2964 | row 0 <= I < NLINES which is empty. | |
2965 | ||
2966 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 2967 | |
5f5c8ee5 GM |
2968 | void |
2969 | mirrored_line_dance (matrix, unchanged_at_top, nlines, copy_from, | |
2970 | retained_p) | |
2971 | struct glyph_matrix *matrix; | |
2972 | int unchanged_at_top, nlines; | |
2973 | int *copy_from; | |
2974 | char *retained_p; | |
2975 | { | |
2976 | /* A copy of original rows. */ | |
2977 | struct glyph_row *old_rows; | |
2978 | ||
2979 | /* Rows to assign to. */ | |
2980 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 2981 | |
5f5c8ee5 GM |
2982 | int i; |
2983 | ||
2984 | /* Make a copy of the original rows. */ | |
2985 | old_rows = (struct glyph_row *) alloca (nlines * sizeof *old_rows); | |
2986 | bcopy (new_rows, old_rows, nlines * sizeof *old_rows); | |
2987 | ||
2988 | /* Assign new rows, maybe clear lines. */ | |
2989 | for (i = 0; i < nlines; ++i) | |
2990 | { | |
2991 | int enabled_before_p = new_rows[i].enabled_p; | |
2992 | ||
2993 | xassert (i + unchanged_at_top < matrix->nrows); | |
2994 | xassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
2995 | new_rows[i] = old_rows[copy_from[i]]; | |
2996 | new_rows[i].enabled_p = enabled_before_p; | |
2997 | ||
2998 | /* RETAINED_P is zero for empty lines. */ | |
2999 | if (!retained_p[copy_from[i]]) | |
3000 | new_rows[i].enabled_p = 0; | |
3001 | } | |
3002 | ||
153a073c | 3003 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 GM |
3004 | if (frame_matrix_frame) |
3005 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), | |
3006 | unchanged_at_top, nlines, copy_from, retained_p); | |
3007 | } | |
3008 | ||
3009 | ||
a13396c9 | 3010 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 3011 | the current frame matrix. */ |
a13396c9 GM |
3012 | |
3013 | static void | |
3014 | sync_window_with_frame_matrix_rows (w) | |
3015 | struct window *w; | |
3016 | { | |
3017 | struct frame *f = XFRAME (w->frame); | |
3018 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
075c507b | 3019 | int left, right, x, width; |
a13396c9 | 3020 | |
5cb88111 | 3021 | /* Preconditions: W must be a leaf window on a tty frame. */ |
a13396c9 | 3022 | xassert (NILP (w->hchild) && NILP (w->vchild)); |
a13396c9 GM |
3023 | xassert (!FRAME_WINDOW_P (f)); |
3024 | ||
7df02016 KS |
3025 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
3026 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
3027 | x = w->current_matrix->matrix_x; |
3028 | width = w->current_matrix->matrix_w; | |
3029 | ||
a13396c9 GM |
3030 | window_row = w->current_matrix->rows; |
3031 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 3032 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 3033 | |
5cb88111 | 3034 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 3035 | { |
5cb88111 GM |
3036 | window_row->glyphs[LEFT_MARGIN_AREA] |
3037 | = frame_row->glyphs[0] + x; | |
3038 | window_row->glyphs[TEXT_AREA] | |
3039 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
3040 | window_row->glyphs[LAST_AREA] | |
3041 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
3042 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
3043 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
3044 | } |
3045 | } | |
3046 | ||
3047 | ||
3048 | /* Return the window in the window tree rooted in W containing frame | |
3049 | row ROW. Value is null if none is found. */ | |
3050 | ||
3051 | struct window * | |
3052 | frame_row_to_window (w, row) | |
3053 | struct window *w; | |
3054 | int row; | |
3055 | { | |
3056 | struct window *found = NULL; | |
177c0ea7 | 3057 | |
a13396c9 GM |
3058 | while (w && !found) |
3059 | { | |
3060 | if (!NILP (w->hchild)) | |
3061 | found = frame_row_to_window (XWINDOW (w->hchild), row); | |
3062 | else if (!NILP (w->vchild)) | |
3063 | found = frame_row_to_window (XWINDOW (w->vchild), row); | |
7df02016 KS |
3064 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
3065 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 3066 | found = w; |
177c0ea7 | 3067 | |
a13396c9 GM |
3068 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3069 | } | |
3070 | ||
3071 | return found; | |
3072 | } | |
3073 | ||
3074 | ||
5f5c8ee5 GM |
3075 | /* Perform a line dance in the window tree rooted at W, after |
3076 | scrolling a frame matrix in mirrored_line_dance. | |
3077 | ||
3078 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
3079 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
3080 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
3081 | I < NLINES, the index of the original line to move to I. This | |
3082 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
3083 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
3084 | which is empty. */ | |
3085 | ||
3086 | static void | |
3087 | mirror_line_dance (w, unchanged_at_top, nlines, copy_from, retained_p) | |
3088 | struct window *w; | |
3089 | int unchanged_at_top, nlines; | |
3090 | int *copy_from; | |
3091 | char *retained_p; | |
3092 | { | |
3093 | while (w) | |
3094 | { | |
3095 | if (!NILP (w->hchild)) | |
3096 | mirror_line_dance (XWINDOW (w->hchild), unchanged_at_top, | |
3097 | nlines, copy_from, retained_p); | |
3098 | else if (!NILP (w->vchild)) | |
3099 | mirror_line_dance (XWINDOW (w->vchild), unchanged_at_top, | |
3100 | nlines, copy_from, retained_p); | |
3101 | else | |
3102 | { | |
3103 | /* W is a leaf window, and we are working on its current | |
3104 | matrix m. */ | |
3105 | struct glyph_matrix *m = w->current_matrix; | |
a13396c9 | 3106 | int i, sync_p = 0; |
5f5c8ee5 GM |
3107 | struct glyph_row *old_rows; |
3108 | ||
3109 | /* Make a copy of the original rows of matrix m. */ | |
3110 | old_rows = (struct glyph_row *) alloca (m->nrows * sizeof *old_rows); | |
3111 | bcopy (m->rows, old_rows, m->nrows * sizeof *old_rows); | |
3112 | ||
3113 | for (i = 0; i < nlines; ++i) | |
3114 | { | |
3115 | /* Frame relative line assigned to. */ | |
3116 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 3117 | |
5f5c8ee5 GM |
3118 | /* Frame relative line assigned. */ |
3119 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 3120 | |
5f5c8ee5 GM |
3121 | /* Window relative line assigned to. */ |
3122 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 3123 | |
5f5c8ee5 GM |
3124 | /* Window relative line assigned. */ |
3125 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 3126 | |
5f5c8ee5 GM |
3127 | /* Is assigned line inside window? */ |
3128 | int from_inside_window_p | |
3129 | = window_from >= 0 && window_from < m->matrix_h; | |
177c0ea7 | 3130 | |
a13396c9 GM |
3131 | /* Is assigned to line inside window? */ |
3132 | int to_inside_window_p | |
3133 | = window_to >= 0 && window_to < m->matrix_h; | |
177c0ea7 | 3134 | |
a13396c9 | 3135 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 3136 | { |
5f5c8ee5 GM |
3137 | /* Enabled setting before assignment. */ |
3138 | int enabled_before_p; | |
177c0ea7 | 3139 | |
5f5c8ee5 GM |
3140 | /* Do the assignment. The enabled_p flag is saved |
3141 | over the assignment because the old redisplay did | |
3142 | that. */ | |
3143 | enabled_before_p = m->rows[window_to].enabled_p; | |
3144 | m->rows[window_to] = old_rows[window_from]; | |
3145 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 3146 | |
5f5c8ee5 GM |
3147 | /* If frame line is empty, window line is empty, too. */ |
3148 | if (!retained_p[copy_from[i]]) | |
3149 | m->rows[window_to].enabled_p = 0; | |
3150 | } | |
a13396c9 GM |
3151 | else if (to_inside_window_p) |
3152 | { | |
3153 | /* A copy between windows. This is an infrequent | |
3154 | case not worth optimizing. */ | |
3155 | struct frame *f = XFRAME (w->frame); | |
3156 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); | |
3157 | struct window *w2; | |
3158 | struct glyph_matrix *m2; | |
3159 | int m2_from; | |
3160 | ||
3161 | w2 = frame_row_to_window (root, frame_to); | |
3162 | m2 = w2->current_matrix; | |
3163 | m2_from = frame_from - m2->matrix_y; | |
3164 | copy_row_except_pointers (m->rows + window_to, | |
3165 | m2->rows + m2_from); | |
177c0ea7 | 3166 | |
a13396c9 GM |
3167 | /* If frame line is empty, window line is empty, too. */ |
3168 | if (!retained_p[copy_from[i]]) | |
3169 | m->rows[window_to].enabled_p = 0; | |
3170 | sync_p = 1; | |
3171 | } | |
3172 | else if (from_inside_window_p) | |
3173 | sync_p = 1; | |
5f5c8ee5 | 3174 | } |
a13396c9 GM |
3175 | |
3176 | /* If there was a copy between windows, make sure glyph | |
3177 | pointers are in sync with the frame matrix. */ | |
3178 | if (sync_p) | |
3179 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 3180 | |
5f5c8ee5 GM |
3181 | /* Check that no pointers are lost. */ |
3182 | CHECK_MATRIX (m); | |
3183 | } | |
3184 | ||
3185 | /* Next window on same level. */ | |
3186 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3187 | } | |
3188 | } | |
3189 | ||
3190 | ||
3191 | #if GLYPH_DEBUG | |
3192 | ||
3193 | /* Check that window and frame matrices agree about their | |
3194 | understanding where glyphs of the rows are to find. For each | |
3195 | window in the window tree rooted at W, check that rows in the | |
3196 | matrices of leaf window agree with their frame matrices about | |
3197 | glyph pointers. */ | |
3198 | ||
3199 | void | |
3200 | check_window_matrix_pointers (w) | |
3201 | struct window *w; | |
3202 | { | |
3203 | while (w) | |
3204 | { | |
3205 | if (!NILP (w->hchild)) | |
3206 | check_window_matrix_pointers (XWINDOW (w->hchild)); | |
3207 | else if (!NILP (w->vchild)) | |
3208 | check_window_matrix_pointers (XWINDOW (w->vchild)); | |
3209 | else | |
60a8948a | 3210 | { |
5f5c8ee5 GM |
3211 | struct frame *f = XFRAME (w->frame); |
3212 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); | |
3213 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 3214 | } |
177c0ea7 | 3215 | |
5f5c8ee5 GM |
3216 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3217 | } | |
3218 | } | |
3219 | ||
3220 | ||
3221 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
3222 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
3223 | each row in WINDOW_MATRIX check that it's a slice of the | |
3224 | corresponding frame row. If it isn't, abort. */ | |
3225 | ||
3226 | static void | |
3227 | check_matrix_pointers (window_matrix, frame_matrix) | |
3228 | struct glyph_matrix *window_matrix, *frame_matrix; | |
3229 | { | |
3230 | /* Row number in WINDOW_MATRIX. */ | |
3231 | int i = 0; | |
3232 | ||
3233 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
3234 | int j = window_matrix->matrix_y; | |
3235 | ||
177c0ea7 | 3236 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
3237 | slice of the row in the frame matrix. If it isn't we didn't |
3238 | mirror an operation on the frame matrix correctly. */ | |
3239 | while (i < window_matrix->nrows) | |
3240 | { | |
3241 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
3242 | frame_matrix->rows + j)) | |
3243 | abort (); | |
3244 | ++i, ++j; | |
3245 | } | |
3246 | } | |
3247 | ||
3248 | #endif /* GLYPH_DEBUG != 0 */ | |
3249 | ||
3250 | ||
3251 | \f | |
3252 | /********************************************************************** | |
3253 | VPOS and HPOS translations | |
3254 | **********************************************************************/ | |
3255 | ||
3256 | #if GLYPH_DEBUG | |
3257 | ||
3258 | /* Translate vertical position VPOS which is relative to window W to a | |
3259 | vertical position relative to W's frame. */ | |
3260 | ||
3261 | static int | |
3262 | window_to_frame_vpos (w, vpos) | |
3263 | struct window *w; | |
3264 | int vpos; | |
3265 | { | |
3266 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 3267 | |
5f5c8ee5 GM |
3268 | xassert (!FRAME_WINDOW_P (f)); |
3269 | xassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); | |
7df02016 KS |
3270 | vpos += WINDOW_TOP_EDGE_LINE (w); |
3271 | xassert (vpos >= 0 && vpos <= FRAME_LINES (f)); | |
5f5c8ee5 GM |
3272 | return vpos; |
3273 | } | |
3274 | ||
3275 | ||
3276 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 3277 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
3278 | |
3279 | static int | |
3280 | window_to_frame_hpos (w, hpos) | |
3281 | struct window *w; | |
3282 | int hpos; | |
3283 | { | |
3284 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 3285 | |
5f5c8ee5 | 3286 | xassert (!FRAME_WINDOW_P (f)); |
7df02016 | 3287 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
3288 | return hpos; |
3289 | } | |
177c0ea7 | 3290 | |
5f5c8ee5 GM |
3291 | #endif /* GLYPH_DEBUG */ |
3292 | ||
3293 | ||
3294 | \f | |
3295 | /********************************************************************** | |
3296 | Redrawing Frames | |
3297 | **********************************************************************/ | |
3298 | ||
3299 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, | |
7ee72033 MB |
3300 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. */) |
3301 | (frame) | |
5f5c8ee5 GM |
3302 | Lisp_Object frame; |
3303 | { | |
3304 | struct frame *f; | |
3305 | ||
b7826503 | 3306 | CHECK_LIVE_FRAME (frame); |
5f5c8ee5 GM |
3307 | f = XFRAME (frame); |
3308 | ||
3309 | /* Ignore redraw requests, if frame has no glyphs yet. | |
3310 | (Implementation note: It still has to be checked why we are | |
3311 | called so early here). */ | |
3312 | if (!glyphs_initialized_initially_p) | |
3313 | return Qnil; | |
3314 | ||
3315 | update_begin (f); | |
f2adda5e | 3316 | if (FRAME_MSDOS_P (f)) |
5f5c8ee5 GM |
3317 | set_terminal_modes (); |
3318 | clear_frame (); | |
3319 | clear_current_matrices (f); | |
3320 | update_end (f); | |
3321 | fflush (stdout); | |
3322 | windows_or_buffers_changed++; | |
3323 | /* Mark all windows as inaccurate, so that every window will have | |
3324 | its redisplay done. */ | |
3325 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
3326 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
3327 | f->garbaged = 0; | |
3328 | return Qnil; | |
3329 | } | |
3330 | ||
3331 | ||
3332 | /* Redraw frame F. This is nothing more than a call to the Lisp | |
3333 | function redraw-frame. */ | |
3334 | ||
3335 | void | |
3336 | redraw_frame (f) | |
3337 | struct frame *f; | |
3338 | { | |
3339 | Lisp_Object frame; | |
3340 | XSETFRAME (frame, f); | |
3341 | Fredraw_frame (frame); | |
3342 | } | |
3343 | ||
3344 | ||
3345 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
7ee72033 MB |
3346 | doc: /* Clear and redisplay all visible frames. */) |
3347 | () | |
5f5c8ee5 GM |
3348 | { |
3349 | Lisp_Object tail, frame; | |
3350 | ||
3351 | FOR_EACH_FRAME (tail, frame) | |
3352 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
3353 | Fredraw_frame (frame); | |
3354 | ||
3355 | return Qnil; | |
3356 | } | |
3357 | ||
3358 | ||
3359 | /* This is used when frame_garbaged is set. Call Fredraw_frame on all | |
3360 | visible frames marked as garbaged. */ | |
3361 | ||
3362 | void | |
3363 | redraw_garbaged_frames () | |
3364 | { | |
3365 | Lisp_Object tail, frame; | |
3366 | ||
3367 | FOR_EACH_FRAME (tail, frame) | |
3368 | if (FRAME_VISIBLE_P (XFRAME (frame)) | |
3369 | && FRAME_GARBAGED_P (XFRAME (frame))) | |
3370 | Fredraw_frame (frame); | |
3371 | } | |
3372 | ||
3373 | ||
3374 | \f | |
3375 | /*********************************************************************** | |
3376 | Direct Operations | |
3377 | ***********************************************************************/ | |
3378 | ||
3379 | /* Try to update display and current glyph matrix directly. | |
3380 | ||
3381 | This function is called after a character G has been inserted into | |
3382 | current_buffer. It tries to update the current glyph matrix and | |
3383 | perform appropriate screen output to reflect the insertion. If it | |
3384 | succeeds, the global flag redisplay_performed_directly_p will be | |
3385 | set to 1, and thereby prevent the more costly general redisplay | |
3386 | from running (see redisplay_internal). | |
3387 | ||
3388 | This function is not called for `hairy' character insertions. | |
3389 | In particular, it is not called when after or before change | |
3390 | functions exist, like they are used by font-lock. See keyboard.c | |
3391 | for details where this function is called. */ | |
3392 | ||
3393 | int | |
3394 | direct_output_for_insert (g) | |
3395 | int g; | |
3396 | { | |
91fb7e1b | 3397 | register struct frame *f = SELECTED_FRAME (); |
5f5c8ee5 GM |
3398 | struct window *w = XWINDOW (selected_window); |
3399 | struct it it, it2; | |
3400 | struct glyph_row *glyph_row; | |
3401 | struct glyph *glyphs, *glyph, *end; | |
3402 | int n; | |
153a073c | 3403 | /* Non-null means that redisplay of W is based on window matrices. */ |
5f5c8ee5 GM |
3404 | int window_redisplay_p = FRAME_WINDOW_P (f); |
3405 | /* Non-null means we are in overwrite mode. */ | |
3406 | int overwrite_p = !NILP (current_buffer->overwrite_mode); | |
3407 | int added_width; | |
3408 | struct text_pos pos; | |
3409 | int delta, delta_bytes; | |
3410 | ||
3411 | /* Not done directly. */ | |
3412 | redisplay_performed_directly_p = 0; | |
3413 | ||
3414 | /* Quickly give up for some common cases. */ | |
3415 | if (cursor_in_echo_area | |
3416 | /* Give up if fonts have changed. */ | |
3417 | || fonts_changed_p | |
3418 | /* Give up if face attributes have been changed. */ | |
3419 | || face_change_count | |
3420 | /* Give up if cursor position not really known. */ | |
3421 | || !display_completed | |
3422 | /* Give up if buffer appears in two places. */ | |
3423 | || buffer_shared > 1 | |
c74e645b GM |
3424 | /* Give up if currently displaying a message instead of the |
3425 | minibuffer contents. */ | |
3426 | || (EQ (selected_window, minibuf_window) | |
3427 | && EQ (minibuf_window, echo_area_window)) | |
5f5c8ee5 GM |
3428 | /* Give up for hscrolled mini-buffer because display of the prompt |
3429 | is handled specially there (see display_line). */ | |
3430 | || (MINI_WINDOW_P (w) && XFASTINT (w->hscroll)) | |
3431 | /* Give up if overwriting in the middle of a line. */ | |
177c0ea7 JB |
3432 | || (overwrite_p |
3433 | && PT != ZV | |
5f5c8ee5 GM |
3434 | && FETCH_BYTE (PT) != '\n') |
3435 | /* Give up for tabs and line ends. */ | |
3436 | || g == '\t' | |
3437 | || g == '\n' | |
3438 | || g == '\r' | |
3439 | /* Give up if unable to display the cursor in the window. */ | |
3440 | || w->cursor.vpos < 0 | |
c224f70b GM |
3441 | /* Give up if we are showing a message or just cleared the message |
3442 | because we might need to resize the echo area window. */ | |
3443 | || !NILP (echo_area_buffer[0]) | |
3444 | || !NILP (echo_area_buffer[1]) | |
408f5064 GM |
3445 | || (glyph_row = MATRIX_ROW (w->current_matrix, w->cursor.vpos), |
3446 | /* Can't do it in a continued line because continuation | |
3447 | lines would change. */ | |
3448 | (glyph_row->continued_p | |
3449 | /* Can't use this method if the line overlaps others or is | |
3450 | overlapped by others because these other lines would | |
3451 | have to be redisplayed. */ | |
3452 | || glyph_row->overlapping_p | |
3453 | || glyph_row->overlapped_p)) | |
5f5c8ee5 GM |
3454 | /* Can't do it for partial width windows on terminal frames |
3455 | because we can't clear to eol in such a window. */ | |
3456 | || (!window_redisplay_p && !WINDOW_FULL_WIDTH_P (w))) | |
3457 | return 0; | |
3458 | ||
f3ffc2c3 GM |
3459 | /* If we can't insert glyphs, we can use this method only |
3460 | at the end of a line. */ | |
3461 | if (!char_ins_del_ok) | |
3462 | if (PT != ZV && FETCH_BYTE (PT_BYTE) != '\n') | |
3463 | return 0; | |
3464 | ||
5f5c8ee5 GM |
3465 | /* Set up a display iterator structure for W. Glyphs will be |
3466 | produced in scratch_glyph_row. Current position is W's cursor | |
3467 | position. */ | |
3468 | clear_glyph_row (&scratch_glyph_row); | |
3469 | SET_TEXT_POS (pos, PT, PT_BYTE); | |
5f15d712 | 3470 | DEC_TEXT_POS (pos, !NILP (current_buffer->enable_multibyte_characters)); |
5f5c8ee5 GM |
3471 | init_iterator (&it, w, CHARPOS (pos), BYTEPOS (pos), &scratch_glyph_row, |
3472 | DEFAULT_FACE_ID); | |
3473 | ||
3474 | glyph_row = MATRIX_ROW (w->current_matrix, w->cursor.vpos); | |
e876ff42 GM |
3475 | if (glyph_row->mouse_face_p) |
3476 | return 0; | |
177c0ea7 | 3477 | |
5f5c8ee5 GM |
3478 | /* Give up if highlighting trailing whitespace and we have trailing |
3479 | whitespace in glyph_row. We would have to remove the trailing | |
3480 | whitespace face in that case. */ | |
f1f13490 | 3481 | if (!NILP (Vshow_trailing_whitespace) |
5f5c8ee5 GM |
3482 | && glyph_row->used[TEXT_AREA]) |
3483 | { | |
3484 | struct glyph *last; | |
3485 | ||
3486 | last = glyph_row->glyphs[TEXT_AREA] + glyph_row->used[TEXT_AREA] - 1; | |
3487 | if (last->type == STRETCH_GLYPH | |
3488 | || (last->type == CHAR_GLYPH | |
42186983 | 3489 | && last->u.ch == ' ')) |
5f5c8ee5 GM |
3490 | return 0; |
3491 | } | |
3492 | ||
3493 | /* Give up if there are overlay strings at pos. This would fail | |
3494 | if the overlay string has newlines in it. */ | |
3495 | if (STRINGP (it.string)) | |
3496 | return 0; | |
177c0ea7 | 3497 | |
5f5c8ee5 GM |
3498 | it.hpos = w->cursor.hpos; |
3499 | it.vpos = w->cursor.vpos; | |
3500 | it.current_x = w->cursor.x + it.first_visible_x; | |
3501 | it.current_y = w->cursor.y; | |
3502 | it.end_charpos = PT; | |
3503 | it.stop_charpos = min (PT, it.stop_charpos); | |
ae76d741 | 3504 | it.stop_charpos = max (IT_CHARPOS (it), it.stop_charpos); |
5f5c8ee5 GM |
3505 | |
3506 | /* More than one display element may be returned for PT - 1 if | |
3507 | (i) it's a control character which is translated into `\003' or | |
177c0ea7 | 3508 | `^C', or (ii) it has a display table entry, or (iii) it's a |
5f5c8ee5 GM |
3509 | combination of both. */ |
3510 | delta = delta_bytes = 0; | |
3511 | while (get_next_display_element (&it)) | |
3512 | { | |
3513 | PRODUCE_GLYPHS (&it); | |
3514 | ||
3515 | /* Give up if glyph doesn't fit completely on the line. */ | |
3516 | if (it.current_x >= it.last_visible_x) | |
3517 | return 0; | |
3518 | ||
3519 | /* Give up if new glyph has different ascent or descent than | |
3520 | the original row, or if it is not a character glyph. */ | |
3521 | if (glyph_row->ascent != it.ascent | |
3522 | || glyph_row->height != it.ascent + it.descent | |
408f5064 GM |
3523 | || glyph_row->phys_ascent != it.phys_ascent |
3524 | || glyph_row->phys_height != it.phys_ascent + it.phys_descent | |
5f5c8ee5 GM |
3525 | || it.what != IT_CHARACTER) |
3526 | return 0; | |
3527 | ||
3528 | delta += 1; | |
3529 | delta_bytes += it.len; | |
a2e2a7f6 | 3530 | set_iterator_to_next (&it, 1); |
5f5c8ee5 GM |
3531 | } |
3532 | ||
3533 | /* Give up if we hit the right edge of the window. We would have | |
3534 | to insert truncation or continuation glyphs. */ | |
3535 | added_width = it.current_x - (w->cursor.x + it.first_visible_x); | |
3536 | if (glyph_row->pixel_width + added_width >= it.last_visible_x) | |
3537 | return 0; | |
3538 | ||
3539 | /* Give up if there is a \t following in the line. */ | |
3540 | it2 = it; | |
3541 | it2.end_charpos = ZV; | |
3542 | it2.stop_charpos = min (it2.stop_charpos, ZV); | |
3543 | while (get_next_display_element (&it2) | |
3544 | && !ITERATOR_AT_END_OF_LINE_P (&it2)) | |
3545 | { | |
3546 | if (it2.c == '\t') | |
3547 | return 0; | |
a2e2a7f6 | 3548 | set_iterator_to_next (&it2, 1); |
5f5c8ee5 GM |
3549 | } |
3550 | ||
3551 | /* Number of new glyphs produced. */ | |
3552 | n = it.glyph_row->used[TEXT_AREA]; | |
3553 | ||
3554 | /* Start and end of glyphs in original row. */ | |
3555 | glyphs = glyph_row->glyphs[TEXT_AREA] + w->cursor.hpos; | |
3556 | end = glyph_row->glyphs[1 + TEXT_AREA]; | |
60a8948a | 3557 | |
5f5c8ee5 GM |
3558 | /* Make room for new glyphs, then insert them. */ |
3559 | xassert (end - glyphs - n >= 0); | |
700fb05a GM |
3560 | safe_bcopy ((char *) glyphs, (char *) (glyphs + n), |
3561 | (end - glyphs - n) * sizeof (*end)); | |
5f5c8ee5 GM |
3562 | bcopy (it.glyph_row->glyphs[TEXT_AREA], glyphs, n * sizeof *glyphs); |
3563 | glyph_row->used[TEXT_AREA] = min (glyph_row->used[TEXT_AREA] + n, | |
3564 | end - glyph_row->glyphs[TEXT_AREA]); | |
177c0ea7 | 3565 | |
5f5c8ee5 GM |
3566 | /* Compute new line width. */ |
3567 | glyph = glyph_row->glyphs[TEXT_AREA]; | |
3568 | end = glyph + glyph_row->used[TEXT_AREA]; | |
3569 | glyph_row->pixel_width = glyph_row->x; | |
3570 | while (glyph < end) | |
3571 | { | |
3572 | glyph_row->pixel_width += glyph->pixel_width; | |
3573 | ++glyph; | |
3574 | } | |
3575 | ||
177c0ea7 | 3576 | /* Increment buffer positions for glyphs following the newly |
5f5c8ee5 GM |
3577 | inserted ones. */ |
3578 | for (glyph = glyphs + n; glyph < end; ++glyph) | |
f2fa858f | 3579 | if (glyph->charpos > 0 && BUFFERP (glyph->object)) |
5f5c8ee5 | 3580 | glyph->charpos += delta; |
177c0ea7 | 3581 | |
5f5c8ee5 GM |
3582 | if (MATRIX_ROW_END_CHARPOS (glyph_row) > 0) |
3583 | { | |
3584 | MATRIX_ROW_END_CHARPOS (glyph_row) += delta; | |
3585 | MATRIX_ROW_END_BYTEPOS (glyph_row) += delta_bytes; | |
3586 | } | |
177c0ea7 | 3587 | |
5f5c8ee5 | 3588 | /* Adjust positions in lines following the one we are in. */ |
86c11ba1 GM |
3589 | increment_matrix_positions (w->current_matrix, |
3590 | w->cursor.vpos + 1, | |
3591 | w->current_matrix->nrows, | |
3592 | delta, delta_bytes); | |
5f5c8ee5 GM |
3593 | |
3594 | glyph_row->contains_overlapping_glyphs_p | |
3595 | |= it.glyph_row->contains_overlapping_glyphs_p; | |
3596 | ||
975c6226 GM |
3597 | glyph_row->displays_text_p = 1; |
3598 | w->window_end_vpos = make_number (max (w->cursor.vpos, | |
3599 | XFASTINT (w->window_end_vpos))); | |
3600 | ||
f1f13490 | 3601 | if (!NILP (Vshow_trailing_whitespace)) |
5f5c8ee5 GM |
3602 | highlight_trailing_whitespace (it.f, glyph_row); |
3603 | ||
3604 | /* Write glyphs. If at end of row, we can simply call write_glyphs. | |
3605 | In the middle, we have to insert glyphs. Note that this is now | |
3606 | implemented for X frames. The implementation uses updated_window | |
3607 | and updated_row. */ | |
3608 | updated_row = glyph_row; | |
9d126815 | 3609 | updated_area = TEXT_AREA; |
5f5c8ee5 GM |
3610 | update_begin (f); |
3611 | if (rif) | |
3612 | { | |
3613 | rif->update_window_begin_hook (w); | |
177c0ea7 | 3614 | |
7728f17b GM |
3615 | if (glyphs == end - n |
3616 | /* In front of a space added by append_space. */ | |
3617 | || (glyphs == end - n - 1 | |
3618 | && (end - n)->charpos <= 0)) | |
5f5c8ee5 GM |
3619 | rif->write_glyphs (glyphs, n); |
3620 | else | |
3621 | rif->insert_glyphs (glyphs, n); | |
3622 | } | |
3623 | else | |
3624 | { | |
3625 | if (glyphs == end - n) | |
3626 | write_glyphs (glyphs, n); | |
3627 | else | |
3628 | insert_glyphs (glyphs, n); | |
3629 | } | |
4588ec20 | 3630 | |
5f5c8ee5 GM |
3631 | w->cursor.hpos += n; |
3632 | w->cursor.x = it.current_x - it.first_visible_x; | |
3633 | xassert (w->cursor.hpos >= 0 | |
3634 | && w->cursor.hpos < w->desired_matrix->matrix_w); | |
3635 | ||
3636 | /* How to set the cursor differs depending on whether we are | |
3637 | using a frame matrix or a window matrix. Note that when | |
3638 | a frame matrix is used, cursor_to expects frame coordinates, | |
3639 | and the X and Y parameters are not used. */ | |
3640 | if (window_redisplay_p) | |
3641 | rif->cursor_to (w->cursor.vpos, w->cursor.hpos, | |
3642 | w->cursor.y, w->cursor.x); | |
3643 | else | |
3644 | { | |
3645 | int x, y; | |
3646 | x = (WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos) | |
7df02016 KS |
3647 | + (INTEGERP (w->left_margin_cols) |
3648 | ? XFASTINT (w->left_margin_cols) | |
5f5c8ee5 GM |
3649 | : 0)); |
3650 | y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
3651 | cursor_to (y, x); | |
3652 | } | |
4588ec20 | 3653 | |
5f5c8ee5 | 3654 | if (rif) |
e876ff42 | 3655 | rif->update_window_end_hook (w, 1, 0); |
5f5c8ee5 GM |
3656 | update_end (f); |
3657 | updated_row = NULL; | |
3658 | fflush (stdout); | |
4588ec20 | 3659 | |
5f5c8ee5 | 3660 | TRACE ((stderr, "direct output for insert\n")); |
fc5206ff | 3661 | mark_window_display_accurate (it.window, 1); |
5f5c8ee5 GM |
3662 | redisplay_performed_directly_p = 1; |
3663 | return 1; | |
3664 | } | |
448fd7c0 | 3665 | |
4588ec20 | 3666 | |
5f5c8ee5 GM |
3667 | /* Perform a direct display update for moving PT by N positions |
3668 | left or right. N < 0 means a movement backwards. This function | |
3669 | is currently only called for N == 1 or N == -1. */ | |
3670 | ||
3671 | int | |
3672 | direct_output_forward_char (n) | |
3673 | int n; | |
3674 | { | |
91fb7e1b | 3675 | struct frame *f = SELECTED_FRAME (); |
5f5c8ee5 GM |
3676 | struct window *w = XWINDOW (selected_window); |
3677 | struct glyph_row *row; | |
3678 | ||
959804a0 | 3679 | /* Give up if point moved out of or into a composition. */ |
7c752c80 | 3680 | if (check_point_in_composition (current_buffer, XINT (w->last_point), |
959804a0 KH |
3681 | current_buffer, PT)) |
3682 | return 0; | |
3683 | ||
5f5c8ee5 GM |
3684 | /* Give up if face attributes have been changed. */ |
3685 | if (face_change_count) | |
3686 | return 0; | |
177c0ea7 JB |
3687 | |
3688 | /* Give up if current matrix is not up to date or we are | |
5f5c8ee5 GM |
3689 | displaying a message. */ |
3690 | if (!display_completed || cursor_in_echo_area) | |
3691 | return 0; | |
3692 | ||
3693 | /* Give up if the buffer's direction is reversed. */ | |
3694 | if (!NILP (XBUFFER (w->buffer)->direction_reversed)) | |
3695 | return 0; | |
3696 | ||
3697 | /* Can't use direct output if highlighting a region. */ | |
3698 | if (!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active)) | |
3699 | return 0; | |
3700 | ||
f1f13490 GM |
3701 | /* Can't use direct output if highlighting trailing whitespace. */ |
3702 | if (!NILP (Vshow_trailing_whitespace)) | |
3703 | return 0; | |
3704 | ||
d2d2ddaf GM |
3705 | /* Give up if we are showing a message or just cleared the message |
3706 | because we might need to resize the echo area window. */ | |
3707 | if (!NILP (echo_area_buffer[0]) || !NILP (echo_area_buffer[1])) | |
3708 | return 0; | |
3709 | ||
e4e0bee9 GM |
3710 | /* Give up if currently displaying a message instead of the |
3711 | minibuffer contents. */ | |
3712 | if (XWINDOW (minibuf_window) == w | |
3713 | && EQ (minibuf_window, echo_area_window)) | |
3714 | return 0; | |
177c0ea7 | 3715 | |
d2d2ddaf GM |
3716 | /* Give up if we don't know where the cursor is. */ |
3717 | if (w->cursor.vpos < 0) | |
3718 | return 0; | |
3719 | ||
5f5c8ee5 GM |
3720 | row = MATRIX_ROW (w->current_matrix, w->cursor.vpos); |
3721 | ||
2a8bd25f | 3722 | /* Give up if PT is outside of the last known cursor row. */ |
9b784ab8 GM |
3723 | if (PT <= MATRIX_ROW_START_CHARPOS (row) |
3724 | || PT >= MATRIX_ROW_END_CHARPOS (row)) | |
5f5c8ee5 GM |
3725 | return 0; |
3726 | ||
3727 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
177c0ea7 | 3728 | |
5f5c8ee5 GM |
3729 | w->last_cursor = w->cursor; |
3730 | XSETFASTINT (w->last_point, PT); | |
3731 | ||
3732 | xassert (w->cursor.hpos >= 0 | |
3733 | && w->cursor.hpos < w->desired_matrix->matrix_w); | |
177c0ea7 | 3734 | |
5f5c8ee5 GM |
3735 | if (FRAME_WINDOW_P (f)) |
3736 | rif->cursor_to (w->cursor.vpos, w->cursor.hpos, | |
3737 | w->cursor.y, w->cursor.x); | |
3738 | else | |
3739 | { | |
3740 | int x, y; | |
3741 | x = (WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos) | |
7df02016 KS |
3742 | + (INTEGERP (w->left_margin_cols) |
3743 | ? XFASTINT (w->left_margin_cols) | |
5f5c8ee5 GM |
3744 | : 0)); |
3745 | y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
3746 | cursor_to (y, x); | |
4588ec20 | 3747 | } |
177c0ea7 | 3748 | |
5f5c8ee5 GM |
3749 | fflush (stdout); |
3750 | redisplay_performed_directly_p = 1; | |
4588ec20 JB |
3751 | return 1; |
3752 | } | |
5f5c8ee5 GM |
3753 | |
3754 | ||
4588ec20 | 3755 | \f |
5f5c8ee5 GM |
3756 | /*********************************************************************** |
3757 | Frame Update | |
3758 | ***********************************************************************/ | |
4588ec20 | 3759 | |
5f5c8ee5 | 3760 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 3761 | |
5f5c8ee5 GM |
3762 | If FORCE_P is non-zero, don't let redisplay be stopped by detecting |
3763 | pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try | |
3764 | scrolling. | |
177c0ea7 | 3765 | |
5f5c8ee5 | 3766 | Value is non-zero if redisplay was stopped due to pending input. */ |
4588ec20 | 3767 | |
5f5c8ee5 GM |
3768 | int |
3769 | update_frame (f, force_p, inhibit_hairy_id_p) | |
3770 | struct frame *f; | |
3771 | int force_p; | |
3772 | int inhibit_hairy_id_p; | |
3773 | { | |
3774 | /* 1 means display has been paused because of pending input. */ | |
3775 | int paused_p; | |
3776 | struct window *root_window = XWINDOW (f->root_window); | |
3777 | ||
3778 | if (FRAME_WINDOW_P (f)) | |
4588ec20 | 3779 | { |
5f5c8ee5 GM |
3780 | /* We are working on window matrix basis. All windows whose |
3781 | flag must_be_updated_p is set have to be updated. */ | |
3782 | ||
3783 | /* Record that we are not working on frame matrices. */ | |
3784 | set_frame_matrix_frame (NULL); | |
3785 | ||
3786 | /* Update all windows in the window tree of F, maybe stopping | |
3787 | when pending input is detected. */ | |
3788 | update_begin (f); | |
3789 | ||
3790 | /* Update the menu bar on X frames that don't have toolkit | |
3791 | support. */ | |
3792 | if (WINDOWP (f->menu_bar_window)) | |
3793 | update_window (XWINDOW (f->menu_bar_window), 1); | |
3794 | ||
3795 | /* Update the tool-bar window, if present. */ | |
9ea173e8 | 3796 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3797 | { |
9ea173e8 | 3798 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3799 | |
3800 | /* Update tool-bar window. */ | |
3801 | if (w->must_be_updated_p) | |
4588ec20 | 3802 | { |
153a073c PJ |
3803 | Lisp_Object tem; |
3804 | ||
5f5c8ee5 GM |
3805 | update_window (w, 1); |
3806 | w->must_be_updated_p = 0; | |
3807 | ||
3808 | /* Swap tool-bar strings. We swap because we want to | |
3809 | reuse strings. */ | |
9ea173e8 GM |
3810 | tem = f->current_tool_bar_string; |
3811 | f->current_tool_bar_string = f->desired_tool_bar_string; | |
3812 | f->desired_tool_bar_string = tem; | |
4588ec20 JB |
3813 | } |
3814 | } | |
177c0ea7 | 3815 | |
5f5c8ee5 GM |
3816 | |
3817 | /* Update windows. */ | |
3818 | paused_p = update_window_tree (root_window, force_p); | |
3819 | update_end (f); | |
177c0ea7 | 3820 | |
868dd24b GM |
3821 | #if 0 /* This flush is a performance bottleneck under X, |
3822 | and it doesn't seem to be necessary anyway. */ | |
5f5c8ee5 GM |
3823 | rif->flush_display (f); |
3824 | #endif | |
4588ec20 | 3825 | } |
5f5c8ee5 GM |
3826 | else |
3827 | { | |
3828 | /* We are working on frame matrix basis. Set the frame on whose | |
3829 | frame matrix we operate. */ | |
3830 | set_frame_matrix_frame (f); | |
3831 | ||
868dd24b | 3832 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3833 | build_frame_matrix (f); |
177c0ea7 | 3834 | |
868dd24b GM |
3835 | /* Update the display */ |
3836 | update_begin (f); | |
5f5c8ee5 | 3837 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3838 | update_end (f); |
3839 | ||
3840 | if (termscript) | |
3841 | fflush (termscript); | |
3842 | fflush (stdout); | |
3843 | ||
5f5c8ee5 | 3844 | /* Check window matrices for lost pointers. */ |
2d5912c1 | 3845 | #if GLYPH_DEBUG |
9b0e97aa GM |
3846 | check_window_matrix_pointers (root_window); |
3847 | add_frame_display_history (f, paused_p); | |
3848 | #endif | |
5f5c8ee5 GM |
3849 | } |
3850 | ||
3851 | /* Reset flags indicating that a window should be updated. */ | |
3852 | set_window_update_flags (root_window, 0); | |
177c0ea7 | 3853 | |
868dd24b | 3854 | display_completed = !paused_p; |
5f5c8ee5 | 3855 | return paused_p; |
4588ec20 | 3856 | } |
5f5c8ee5 GM |
3857 | |
3858 | ||
4588ec20 | 3859 | \f |
5f5c8ee5 GM |
3860 | /************************************************************************ |
3861 | Window-based updates | |
3862 | ************************************************************************/ | |
3863 | ||
3864 | /* Perform updates in window tree rooted at W. FORCE_P non-zero means | |
3865 | don't stop updating when input is pending. */ | |
3866 | ||
3867 | static int | |
3868 | update_window_tree (w, force_p) | |
3869 | struct window *w; | |
3870 | int force_p; | |
3871 | { | |
3872 | int paused_p = 0; | |
177c0ea7 | 3873 | |
5f5c8ee5 GM |
3874 | while (w && !paused_p) |
3875 | { | |
3876 | if (!NILP (w->hchild)) | |
3877 | paused_p |= update_window_tree (XWINDOW (w->hchild), force_p); | |
3878 | else if (!NILP (w->vchild)) | |
3879 | paused_p |= update_window_tree (XWINDOW (w->vchild), force_p); | |
3880 | else if (w->must_be_updated_p) | |
3881 | paused_p |= update_window (w, force_p); | |
3882 | ||
3883 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3884 | } | |
3885 | ||
3886 | return paused_p; | |
3887 | } | |
3888 | ||
3889 | ||
3890 | /* Update window W if its flag must_be_updated_p is non-zero. If | |
3891 | FORCE_P is non-zero, don't stop updating if input is pending. */ | |
3892 | ||
3893 | void | |
3894 | update_single_window (w, force_p) | |
3895 | struct window *w; | |
3896 | int force_p; | |
3897 | { | |
3898 | if (w->must_be_updated_p) | |
3899 | { | |
3900 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
3901 | ||
3902 | /* Record that this is not a frame-based redisplay. */ | |
3903 | set_frame_matrix_frame (NULL); | |
3904 | ||
3905 | /* Update W. */ | |
3906 | update_begin (f); | |
3907 | update_window (w, force_p); | |
3908 | update_end (f); | |
4588ec20 | 3909 | |
5f5c8ee5 GM |
3910 | /* Reset flag in W. */ |
3911 | w->must_be_updated_p = 0; | |
3912 | } | |
3913 | } | |
4588ec20 | 3914 | |
4588ec20 | 3915 | |
408f5064 GM |
3916 | /* Redraw lines from the current matrix of window W that are |
3917 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
3918 | ||
3919 | static void | |
3920 | redraw_overlapped_rows (w, yb) | |
3921 | struct window *w; | |
3922 | int yb; | |
3923 | { | |
d8ee7803 | 3924 | int i; |
177c0ea7 | 3925 | |
408f5064 GM |
3926 | /* If rows overlapping others have been changed, the rows being |
3927 | overlapped have to be redrawn. This won't draw lines that have | |
3928 | already been drawn in update_window_line because overlapped_p in | |
3929 | desired rows is 0, so after row assignment overlapped_p in | |
3930 | current rows is 0. */ | |
3931 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
3932 | { | |
e876ff42 | 3933 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
3934 | |
3935 | if (!row->enabled_p) | |
3936 | break; | |
3937 | else if (row->mode_line_p) | |
3938 | continue; | |
177c0ea7 | 3939 | |
408f5064 GM |
3940 | if (row->overlapped_p) |
3941 | { | |
3942 | enum glyph_row_area area; | |
177c0ea7 | 3943 | |
408f5064 GM |
3944 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
3945 | { | |
3946 | updated_row = row; | |
3947 | updated_area = area; | |
3948 | rif->cursor_to (i, 0, row->y, area == TEXT_AREA ? row->x : 0); | |
3949 | if (row->used[area]) | |
3950 | rif->write_glyphs (row->glyphs[area], row->used[area]); | |
3951 | rif->clear_end_of_line (-1); | |
3952 | } | |
177c0ea7 | 3953 | |
408f5064 GM |
3954 | row->overlapped_p = 0; |
3955 | } | |
3956 | ||
e876ff42 | 3957 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
3958 | break; |
3959 | } | |
3960 | } | |
3961 | ||
3962 | ||
3963 | /* Redraw lines from the current matrix of window W that overlap | |
3964 | others. YB is bottom-most y-position in W. */ | |
3965 | ||
3966 | static void | |
3967 | redraw_overlapping_rows (w, yb) | |
3968 | struct window *w; | |
3969 | int yb; | |
3970 | { | |
3971 | int i, bottom_y; | |
3972 | struct glyph_row *row; | |
177c0ea7 | 3973 | |
408f5064 GM |
3974 | for (i = 0; i < w->current_matrix->nrows; ++i) |
3975 | { | |
3976 | row = w->current_matrix->rows + i; | |
3977 | ||
3978 | if (!row->enabled_p) | |
3979 | break; | |
3980 | else if (row->mode_line_p) | |
3981 | continue; | |
177c0ea7 | 3982 | |
408f5064 GM |
3983 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
3984 | ||
3985 | if (row->overlapping_p && i > 0 && bottom_y < yb) | |
3986 | { | |
3987 | if (row->used[LEFT_MARGIN_AREA]) | |
3988 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA); | |
177c0ea7 | 3989 | |
408f5064 GM |
3990 | if (row->used[TEXT_AREA]) |
3991 | rif->fix_overlapping_area (w, row, TEXT_AREA); | |
177c0ea7 | 3992 | |
408f5064 GM |
3993 | if (row->used[RIGHT_MARGIN_AREA]) |
3994 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA); | |
3995 | ||
153a073c | 3996 | /* Record in neighbour rows that ROW overwrites part of their |
408f5064 GM |
3997 | display. */ |
3998 | if (row->phys_ascent > row->ascent && i > 0) | |
3999 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
4000 | if ((row->phys_height - row->phys_ascent | |
4001 | > row->height - row->ascent) | |
4002 | && bottom_y < yb) | |
4003 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
4004 | } | |
4005 | ||
4006 | if (bottom_y >= yb) | |
4007 | break; | |
4008 | } | |
4009 | } | |
4010 | ||
4011 | ||
93962bfa GM |
4012 | #ifdef GLYPH_DEBUG |
4013 | ||
4014 | /* Check that no row in the current matrix of window W is enabled | |
4015 | which is below what's displayed in the window. */ | |
4016 | ||
4017 | void | |
4018 | check_current_matrix_flags (w) | |
4019 | struct window *w; | |
4020 | { | |
4021 | int last_seen_p = 0; | |
4022 | int i, yb = window_text_bottom_y (w); | |
4023 | ||
4024 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
4025 | { | |
4026 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
4027 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
4028 | last_seen_p = 1; | |
4029 | else if (last_seen_p && row->enabled_p) | |
4030 | abort (); | |
4031 | } | |
4032 | } | |
4033 | ||
4034 | #endif /* GLYPH_DEBUG */ | |
4035 | ||
4036 | ||
5f5c8ee5 GM |
4037 | /* Update display of window W. FORCE_P non-zero means that we should |
4038 | not stop when detecting pending input. */ | |
4039 | ||
4040 | static int | |
4041 | update_window (w, force_p) | |
4588ec20 | 4042 | struct window *w; |
5f5c8ee5 | 4043 | int force_p; |
4588ec20 | 4044 | { |
5f5c8ee5 GM |
4045 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4046 | int paused_p; | |
4047 | int preempt_count = baud_rate / 2400 + 1; | |
4048 | extern int input_pending; | |
8fd9a666 | 4049 | extern Lisp_Object do_mouse_tracking; |
b96fd3e8 GM |
4050 | #if GLYPH_DEBUG |
4051 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
b96fd3e8 | 4052 | #endif |
5f5c8ee5 GM |
4053 | |
4054 | /* Check that W's frame doesn't have glyph matrices. */ | |
4055 | xassert (FRAME_WINDOW_P (f)); | |
4056 | xassert (updating_frame != NULL); | |
4057 | ||
4058 | /* Check pending input the first time so that we can quickly return. */ | |
4059 | if (redisplay_dont_pause) | |
4060 | force_p = 1; | |
4061 | else | |
4062 | detect_input_pending (); | |
4588ec20 | 4063 | |
5f5c8ee5 GM |
4064 | /* If forced to complete the update, or if no input is pending, do |
4065 | the update. */ | |
8fd9a666 | 4066 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 4067 | { |
5f5c8ee5 GM |
4068 | struct glyph_row *row, *end; |
4069 | struct glyph_row *mode_line_row; | |
56974e03 | 4070 | struct glyph_row *header_line_row; |
e87b8809 | 4071 | int yb, changed_p = 0, mouse_face_overwritten_p = 0, n_updated; |
5f5c8ee5 GM |
4072 | |
4073 | rif->update_window_begin_hook (w); | |
4074 | yb = window_text_bottom_y (w); | |
4075 | ||
153a073c PJ |
4076 | /* If window has a header line, update it before everything else. |
4077 | Adjust y-positions of other rows by the header line height. */ | |
5f5c8ee5 GM |
4078 | row = desired_matrix->rows; |
4079 | end = row + desired_matrix->nrows - 1; | |
177c0ea7 | 4080 | |
5f5c8ee5 | 4081 | if (row->mode_line_p) |
56974e03 GM |
4082 | { |
4083 | header_line_row = row; | |
4084 | ++row; | |
4085 | } | |
4086 | else | |
4087 | header_line_row = NULL; | |
5f5c8ee5 GM |
4088 | |
4089 | /* Update the mode line, if necessary. */ | |
4090 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
4091 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
4092 | { | |
4093 | mode_line_row->y = yb; | |
4094 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
4095 | desired_matrix), |
4096 | &mouse_face_overwritten_p); | |
408f5064 | 4097 | changed_p = 1; |
5f5c8ee5 GM |
4098 | } |
4099 | ||
4100 | /* Find first enabled row. Optimizations in redisplay_internal | |
4101 | may lead to an update with only one row enabled. There may | |
4102 | be also completely empty matrices. */ | |
4103 | while (row < end && !row->enabled_p) | |
4104 | ++row; | |
177c0ea7 | 4105 | |
bfdcafe1 | 4106 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 4107 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
4108 | { |
4109 | int rc = scrolling_window (w, header_line_row != NULL); | |
4110 | if (rc < 0) | |
4111 | { | |
4112 | /* All rows were found to be equal. */ | |
4113 | paused_p = 0; | |
4114 | goto set_cursor; | |
4115 | } | |
4116 | else if (rc > 0) | |
4117 | /* We've scrolled the display. */ | |
4118 | force_p = 1; | |
4119 | changed_p = 1; | |
4120 | } | |
5f5c8ee5 | 4121 | |
153a073c | 4122 | /* Update the header line after scrolling because a new header |
5f5c8ee5 GM |
4123 | line would otherwise overwrite lines at the top of the window |
4124 | that can be scrolled. */ | |
045dee35 | 4125 | if (header_line_row && header_line_row->enabled_p) |
5f5c8ee5 | 4126 | { |
045dee35 | 4127 | header_line_row->y = 0; |
e876ff42 | 4128 | update_window_line (w, 0, &mouse_face_overwritten_p); |
408f5064 | 4129 | changed_p = 1; |
5f5c8ee5 GM |
4130 | } |
4131 | ||
4132 | /* Update the rest of the lines. */ | |
e87b8809 | 4133 | for (n_updated = 0; row < end && (force_p || !input_pending); ++row) |
b7412313 | 4134 | if (row->enabled_p) |
5f5c8ee5 GM |
4135 | { |
4136 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
4137 | int i; | |
177c0ea7 | 4138 | |
153a073c | 4139 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
4140 | detect_input_pending. If it's done too often, |
4141 | scrolling large windows with repeated scroll-up | |
4142 | commands will too quickly pause redisplay. */ | |
e87b8809 | 4143 | if (!force_p && ++n_updated % preempt_count == 0) |
5f5c8ee5 GM |
4144 | detect_input_pending (); |
4145 | ||
e876ff42 GM |
4146 | changed_p |= update_window_line (w, vpos, |
4147 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
4148 | |
4149 | /* Mark all rows below the last visible one in the current | |
4150 | matrix as invalid. This is necessary because of | |
4151 | variable line heights. Consider the case of three | |
4152 | successive redisplays, where the first displays 5 | |
4153 | lines, the second 3 lines, and the third 5 lines again. | |
4154 | If the second redisplay wouldn't mark rows in the | |
4155 | current matrix invalid, the third redisplay might be | |
4156 | tempted to optimize redisplay based on lines displayed | |
4157 | in the first redisplay. */ | |
4158 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
4159 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
4160 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
4161 | } | |
4162 | ||
4163 | /* Was display preempted? */ | |
4164 | paused_p = row < end; | |
177c0ea7 | 4165 | |
56974e03 | 4166 | set_cursor: |
177c0ea7 | 4167 | |
153a073c | 4168 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
4169 | if (!paused_p && !w->pseudo_window_p) |
4170 | { | |
e876ff42 GM |
4171 | if (changed_p && rif->fix_overlapping_area) |
4172 | { | |
4173 | redraw_overlapped_rows (w, yb); | |
4174 | redraw_overlapping_rows (w, yb); | |
4175 | } | |
177c0ea7 | 4176 | |
5f5c8ee5 GM |
4177 | /* Make cursor visible at cursor position of W. */ |
4178 | set_window_cursor_after_update (w); | |
4179 | ||
e876ff42 GM |
4180 | #if 0 /* Check that current matrix invariants are satisfied. This is |
4181 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
4182 | IF_DEBUG (check_matrix_invariants (w)); |
4183 | #endif | |
4588ec20 | 4184 | } |
5f5c8ee5 GM |
4185 | |
4186 | #if GLYPH_DEBUG | |
4187 | /* Remember the redisplay method used to display the matrix. */ | |
4188 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
4189 | #endif | |
408f5064 | 4190 | |
56974e03 GM |
4191 | /* End the update of window W. Don't set the cursor if we |
4192 | paused updating the display because in this case, | |
4193 | set_window_cursor_after_update hasn't been called, and | |
4194 | output_cursor doesn't contain the cursor location. */ | |
4195 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); | |
4588ec20 | 4196 | } |
5f5c8ee5 GM |
4197 | else |
4198 | paused_p = 1; | |
4199 | ||
2d5912c1 | 4200 | #if GLYPH_DEBUG |
0cffd9d8 | 4201 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
4202 | add_window_display_history (w, w->current_matrix->method, paused_p); |
4203 | #endif | |
177c0ea7 | 4204 | |
5f5c8ee5 | 4205 | clear_glyph_matrix (desired_matrix); |
408f5064 | 4206 | |
5f5c8ee5 | 4207 | return paused_p; |
4588ec20 JB |
4208 | } |
4209 | ||
b64b3980 | 4210 | |
5f5c8ee5 GM |
4211 | /* Update the display of area AREA in window W, row number VPOS. |
4212 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
4213 | ||
4214 | static void | |
4215 | update_marginal_area (w, area, vpos) | |
b64b3980 | 4216 | struct window *w; |
5f5c8ee5 | 4217 | int area, vpos; |
b64b3980 | 4218 | { |
5f5c8ee5 GM |
4219 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
4220 | ||
4221 | /* Let functions in xterm.c know what area subsequent X positions | |
4222 | will be relative to. */ | |
4223 | updated_area = area; | |
4224 | ||
4225 | /* Set cursor to start of glyphs, write them, and clear to the end | |
4226 | of the area. I don't think that something more sophisticated is | |
4227 | necessary here, since marginal areas will not be the default. */ | |
4228 | rif->cursor_to (vpos, 0, desired_row->y, 0); | |
4229 | if (desired_row->used[area]) | |
4230 | rif->write_glyphs (desired_row->glyphs[area], desired_row->used[area]); | |
4231 | rif->clear_end_of_line (-1); | |
b64b3980 | 4232 | } |
23b0200c | 4233 | |
352f1545 | 4234 | |
408f5064 GM |
4235 | /* Update the display of the text area of row VPOS in window W. |
4236 | Value is non-zero if display has changed. */ | |
5f5c8ee5 | 4237 | |
408f5064 | 4238 | static int |
5f5c8ee5 | 4239 | update_text_area (w, vpos) |
23b0200c | 4240 | struct window *w; |
5f5c8ee5 | 4241 | int vpos; |
23b0200c | 4242 | { |
5f5c8ee5 GM |
4243 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
4244 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
408f5064 | 4245 | int changed_p = 0; |
5f5c8ee5 GM |
4246 | |
4247 | /* Let functions in xterm.c know what area subsequent X positions | |
4248 | will be relative to. */ | |
4249 | updated_area = TEXT_AREA; | |
177c0ea7 | 4250 | |
5f5c8ee5 GM |
4251 | /* If rows are at different X or Y, or rows have different height, |
4252 | or the current row is marked invalid, write the entire line. */ | |
4253 | if (!current_row->enabled_p | |
4254 | || desired_row->y != current_row->y | |
4255 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
4256 | || desired_row->phys_ascent != current_row->phys_ascent |
4257 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 4258 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 4259 | || current_row->overlapped_p |
62ba722a | 4260 | || current_row->mouse_face_p |
5f5c8ee5 GM |
4261 | || current_row->x != desired_row->x) |
4262 | { | |
4263 | rif->cursor_to (vpos, 0, desired_row->y, desired_row->x); | |
177c0ea7 | 4264 | |
5f5c8ee5 GM |
4265 | if (desired_row->used[TEXT_AREA]) |
4266 | rif->write_glyphs (desired_row->glyphs[TEXT_AREA], | |
4267 | desired_row->used[TEXT_AREA]); | |
177c0ea7 | 4268 | |
5f5c8ee5 GM |
4269 | /* Clear to end of window. */ |
4270 | rif->clear_end_of_line (-1); | |
408f5064 | 4271 | changed_p = 1; |
60f2f3f1 GM |
4272 | |
4273 | /* This erases the cursor. We do this here because | |
4274 | notice_overwritten_cursor cannot easily check this, which | |
4275 | might indicate that the whole functionality of | |
4276 | notice_overwritten_cursor would better be implemented here. | |
4277 | On the other hand, we need notice_overwritten_cursor as long | |
4278 | as mouse highlighting is done asynchronously outside of | |
4279 | redisplay. */ | |
4280 | if (vpos == w->phys_cursor.vpos) | |
4281 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
4282 | } |
4283 | else | |
4284 | { | |
4285 | int stop, i, x; | |
4286 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
4287 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
e47306e6 | 4288 | int overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 4289 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
5f5c8ee5 GM |
4290 | |
4291 | /* If the desired row extends its face to the text area end, | |
4292 | make sure we write at least one glyph, so that the face | |
4293 | extension actually takes place. */ | |
4554cc79 | 4294 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) |
074b781a | 4295 | --desired_stop_pos; |
177c0ea7 | 4296 | |
5f5c8ee5 GM |
4297 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
4298 | i = 0; | |
4299 | x = desired_row->x; | |
8399f8a0 GM |
4300 | |
4301 | /* Loop over glyphs that current and desired row may have | |
4302 | in common. */ | |
5f5c8ee5 | 4303 | while (i < stop) |
352f1545 | 4304 | { |
6d950f4c | 4305 | int can_skip_p = 1; |
177c0ea7 | 4306 | |
5f5c8ee5 | 4307 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
4308 | don't have to be written. We can't skip if the last |
4309 | current glyph overlaps the glyph to its right. For | |
4310 | example, consider a current row of `if ' with the `f' in | |
4311 | Courier bold so that it overlaps the ` ' to its right. | |
4312 | If the desired row is ` ', we would skip over the space | |
4313 | after the `if' and there would remain a pixel from the | |
4314 | `f' on the screen. */ | |
4315 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 4316 | { |
e47306e6 GM |
4317 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
4318 | int left, right; | |
177c0ea7 | 4319 | |
e47306e6 GM |
4320 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
4321 | &left, &right); | |
6d950f4c | 4322 | can_skip_p = right == 0; |
352f1545 | 4323 | } |
177c0ea7 | 4324 | |
6d950f4c | 4325 | if (can_skip_p) |
352f1545 | 4326 | { |
6d950f4c GM |
4327 | while (i < stop |
4328 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
4329 | { | |
4330 | x += desired_glyph->pixel_width; | |
4331 | ++desired_glyph, ++current_glyph, ++i; | |
4332 | } | |
4333 | ||
4334 | /* Consider the case that the current row contains "xxx | |
4335 | ppp ggg" in italic Courier font, and the desired row | |
4336 | is "xxx ggg". The character `p' has lbearing, `g' | |
4337 | has not. The loop above will stop in front of the | |
4338 | first `p' in the current row. If we would start | |
4339 | writing glyphs there, we wouldn't erase the lbearing | |
4340 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 4341 | taken care of by draw_glyphs. */ |
6d950f4c GM |
4342 | if (overlapping_glyphs_p |
4343 | && i > 0 | |
4344 | && i < current_row->used[TEXT_AREA] | |
4345 | && (current_row->used[TEXT_AREA] | |
4346 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 4347 | { |
6d950f4c | 4348 | int left, right; |
177c0ea7 | 4349 | |
6d950f4c GM |
4350 | rif->get_glyph_overhangs (current_glyph, XFRAME (w->frame), |
4351 | &left, &right); | |
4352 | while (left > 0 && i > 0) | |
4353 | { | |
4354 | --i, --desired_glyph, --current_glyph; | |
4355 | x -= desired_glyph->pixel_width; | |
4356 | left -= desired_glyph->pixel_width; | |
4357 | } | |
5f5c8ee5 | 4358 | } |
352f1545 | 4359 | } |
177c0ea7 | 4360 | |
5f5c8ee5 GM |
4361 | /* Try to avoid writing the entire rest of the desired row |
4362 | by looking for a resync point. This mainly prevents | |
4363 | mode line flickering in the case the mode line is in | |
4364 | fixed-pitch font, which it usually will be. */ | |
4365 | if (i < desired_row->used[TEXT_AREA]) | |
4366 | { | |
4367 | int start_x = x, start_hpos = i; | |
4368 | struct glyph *start = desired_glyph; | |
4369 | int current_x = x; | |
6d950f4c GM |
4370 | int skip_first_p = !can_skip_p; |
4371 | ||
5f5c8ee5 GM |
4372 | /* Find the next glyph that's equal again. */ |
4373 | while (i < stop | |
6d950f4c GM |
4374 | && (skip_first_p |
4375 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
4376 | && x == current_x) |
4377 | { | |
4378 | x += desired_glyph->pixel_width; | |
4379 | current_x += current_glyph->pixel_width; | |
4380 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 4381 | skip_first_p = 0; |
5f5c8ee5 | 4382 | } |
23b0200c | 4383 | |
5f5c8ee5 GM |
4384 | if (i == start_hpos || x != current_x) |
4385 | { | |
4386 | i = start_hpos; | |
4387 | x = start_x; | |
4388 | desired_glyph = start; | |
4389 | break; | |
4390 | } | |
e47306e6 | 4391 | |
5f5c8ee5 GM |
4392 | rif->cursor_to (vpos, start_hpos, desired_row->y, start_x); |
4393 | rif->write_glyphs (start, i - start_hpos); | |
408f5064 | 4394 | changed_p = 1; |
5f5c8ee5 GM |
4395 | } |
4396 | } | |
177c0ea7 | 4397 | |
5f5c8ee5 GM |
4398 | /* Write the rest. */ |
4399 | if (i < desired_row->used[TEXT_AREA]) | |
4400 | { | |
4401 | rif->cursor_to (vpos, i, desired_row->y, x); | |
4402 | rif->write_glyphs (desired_glyph, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 4403 | changed_p = 1; |
5f5c8ee5 | 4404 | } |
177c0ea7 | 4405 | |
5f5c8ee5 GM |
4406 | /* Maybe clear to end of line. */ |
4407 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
4408 | { | |
4409 | /* If new row extends to the end of the text area, nothing | |
4410 | has to be cleared, if and only if we did a write_glyphs | |
4411 | above. This is made sure by setting desired_stop_pos | |
4412 | appropriately above. */ | |
4413 | xassert (i < desired_row->used[TEXT_AREA]); | |
4414 | } | |
4415 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
4416 | { | |
4417 | /* If old row extends to the end of the text area, clear. */ | |
4418 | if (i >= desired_row->used[TEXT_AREA]) | |
4419 | rif->cursor_to (vpos, i, desired_row->y, | |
4420 | desired_row->x + desired_row->pixel_width); | |
4421 | rif->clear_end_of_line (-1); | |
408f5064 | 4422 | changed_p = 1; |
5f5c8ee5 GM |
4423 | } |
4424 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 4425 | { |
5f5c8ee5 GM |
4426 | /* Otherwise clear to the end of the old row. Everything |
4427 | after that position should be clear already. */ | |
4428 | int x; | |
177c0ea7 | 4429 | |
5f5c8ee5 GM |
4430 | if (i >= desired_row->used[TEXT_AREA]) |
4431 | rif->cursor_to (vpos, i, desired_row->y, | |
4432 | desired_row->x + desired_row->pixel_width); | |
4433 | ||
4434 | /* If cursor is displayed at the end of the line, make sure | |
4435 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
4436 | with which to erase the cursor (because this method | |
4437 | doesn't work with lbearing/rbearing), so we must do it | |
4438 | this way. */ | |
4439 | if (vpos == w->phys_cursor.vpos | |
4440 | && w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]) | |
4441 | { | |
4442 | w->phys_cursor_on_p = 0; | |
4443 | x = -1; | |
4444 | } | |
4445 | else | |
4446 | x = current_row->x + current_row->pixel_width; | |
4447 | rif->clear_end_of_line (x); | |
408f5064 | 4448 | changed_p = 1; |
2e8907d3 | 4449 | } |
23b0200c | 4450 | } |
408f5064 GM |
4451 | |
4452 | return changed_p; | |
23b0200c | 4453 | } |
4588ec20 | 4454 | |
5f5c8ee5 | 4455 | |
408f5064 GM |
4456 | /* Update row VPOS in window W. Value is non-zero if display has been |
4457 | changed. */ | |
5f5c8ee5 | 4458 | |
408f5064 | 4459 | static int |
e876ff42 | 4460 | update_window_line (w, vpos, mouse_face_overwritten_p) |
5f5c8ee5 | 4461 | struct window *w; |
e876ff42 | 4462 | int vpos, *mouse_face_overwritten_p; |
5f5c8ee5 GM |
4463 | { |
4464 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
4465 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
408f5064 | 4466 | int changed_p = 0; |
5f5c8ee5 | 4467 | |
5f5c8ee5 GM |
4468 | /* Set the row being updated. This is important to let xterm.c |
4469 | know what line height values are in effect. */ | |
4470 | updated_row = desired_row; | |
4471 | ||
177c0ea7 JB |
4472 | /* A row can be completely invisible in case a desired matrix was |
4473 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
4474 | the matrix. Make sure to make such rows current anyway, since |
4475 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
4476 | if (desired_row->mode_line_p |
4477 | || desired_row->visible_height > 0) | |
408f5064 | 4478 | { |
504805ac GM |
4479 | xassert (desired_row->enabled_p); |
4480 | ||
4481 | /* Update display of the left margin area, if there is one. */ | |
4482 | if (!desired_row->full_width_p | |
7df02016 | 4483 | && !NILP (w->left_margin_cols)) |
504805ac GM |
4484 | { |
4485 | changed_p = 1; | |
4486 | update_marginal_area (w, LEFT_MARGIN_AREA, vpos); | |
4487 | } | |
177c0ea7 | 4488 | |
504805ac GM |
4489 | /* Update the display of the text area. */ |
4490 | if (update_text_area (w, vpos)) | |
4491 | { | |
4492 | changed_p = 1; | |
4493 | if (current_row->mouse_face_p) | |
4494 | *mouse_face_overwritten_p = 1; | |
4495 | } | |
177c0ea7 | 4496 | |
504805ac GM |
4497 | /* Update display of the right margin area, if there is one. */ |
4498 | if (!desired_row->full_width_p | |
7df02016 | 4499 | && !NILP (w->right_margin_cols)) |
504805ac GM |
4500 | { |
4501 | changed_p = 1; | |
4502 | update_marginal_area (w, RIGHT_MARGIN_AREA, vpos); | |
4503 | } | |
177c0ea7 | 4504 | |
504805ac GM |
4505 | /* Draw truncation marks etc. */ |
4506 | if (!current_row->enabled_p | |
4507 | || desired_row->y != current_row->y | |
4508 | || desired_row->visible_height != current_row->visible_height | |
4509 | || desired_row->overlay_arrow_p != current_row->overlay_arrow_p | |
4510 | || desired_row->truncated_on_left_p != current_row->truncated_on_left_p | |
4511 | || desired_row->truncated_on_right_p != current_row->truncated_on_right_p | |
4512 | || desired_row->continued_p != current_row->continued_p | |
4513 | || desired_row->mode_line_p != current_row->mode_line_p | |
4514 | || (desired_row->indicate_empty_line_p | |
4515 | != current_row->indicate_empty_line_p) | |
4516 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) | |
4517 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
4518 | rif->after_update_window_line_hook (desired_row); | |
408f5064 | 4519 | } |
177c0ea7 | 4520 | |
5f5c8ee5 GM |
4521 | /* Update current_row from desired_row. */ |
4522 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
4523 | updated_row = NULL; | |
408f5064 | 4524 | return changed_p; |
5f5c8ee5 GM |
4525 | } |
4526 | ||
4527 | ||
4528 | /* Set the cursor after an update of window W. This function may only | |
4529 | be called from update_window. */ | |
4530 | ||
4531 | static void | |
4532 | set_window_cursor_after_update (w) | |
4588ec20 JB |
4533 | struct window *w; |
4534 | { | |
5f5c8ee5 GM |
4535 | struct frame *f = XFRAME (w->frame); |
4536 | int cx, cy, vpos, hpos; | |
4537 | ||
4538 | /* Not intended for frame matrix updates. */ | |
4539 | xassert (FRAME_WINDOW_P (f)); | |
177c0ea7 | 4540 | |
b96fd3e8 GM |
4541 | if (cursor_in_echo_area |
4542 | && !NILP (echo_area_buffer[0]) | |
4543 | /* If we are showing a message instead of the mini-buffer, | |
4544 | show the cursor for the message instead. */ | |
4545 | && XWINDOW (minibuf_window) == w | |
4546 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
4547 | /* These cases apply only to the frame that contains |
4548 | the active mini-buffer window. */ | |
4549 | && FRAME_HAS_MINIBUF_P (f) | |
4550 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
4551 | { | |
4552 | cx = cy = vpos = hpos = 0; | |
4553 | ||
4554 | if (cursor_in_echo_area >= 0) | |
4555 | { | |
4556 | /* If the mini-buffer is several lines high, find the last | |
4557 | line that has any text on it. Note: either all lines | |
4558 | are enabled or none. Otherwise we wouldn't be able to | |
4559 | determine Y. */ | |
862b4790 GM |
4560 | struct glyph_row *row, *last_row; |
4561 | struct glyph *glyph; | |
4562 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 4563 | |
862b4790 | 4564 | last_row = NULL; |
6206f8ce GM |
4565 | row = w->current_matrix->rows; |
4566 | while (row->enabled_p | |
4567 | && (last_row == NULL | |
4568 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 4569 | { |
862b4790 GM |
4570 | if (row->used[TEXT_AREA] |
4571 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
4572 | last_row = row; | |
6206f8ce | 4573 | ++row; |
862b4790 | 4574 | } |
177c0ea7 | 4575 | |
5f5c8ee5 GM |
4576 | if (last_row) |
4577 | { | |
6206f8ce GM |
4578 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
4579 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 4580 | |
b96fd3e8 | 4581 | while (last > start && last->charpos < 0) |
862b4790 | 4582 | --last; |
177c0ea7 | 4583 | |
862b4790 GM |
4584 | for (glyph = start; glyph < last; ++glyph) |
4585 | { | |
4586 | cx += glyph->pixel_width; | |
4587 | ++hpos; | |
4588 | } | |
4589 | ||
5f5c8ee5 | 4590 | cy = last_row->y; |
862b4790 | 4591 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
4592 | } |
4593 | } | |
4594 | } | |
4595 | else | |
4596 | { | |
4597 | cx = w->cursor.x; | |
4598 | cy = w->cursor.y; | |
4599 | hpos = w->cursor.hpos; | |
4600 | vpos = w->cursor.vpos; | |
4601 | } | |
4588ec20 | 4602 | |
5f5c8ee5 GM |
4603 | /* Window cursor can be out of sync for horizontally split windows. */ |
4604 | hpos = max (0, hpos); | |
4605 | hpos = min (w->current_matrix->matrix_w - 1, hpos); | |
4606 | vpos = max (0, vpos); | |
4607 | vpos = min (w->current_matrix->nrows - 1, vpos); | |
4608 | rif->cursor_to (vpos, hpos, cy, cx); | |
4588ec20 | 4609 | } |
4588ec20 | 4610 | |
5f5c8ee5 | 4611 | |
6df5d75f GM |
4612 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window |
4613 | tree rooted at W. */ | |
4614 | ||
4615 | void | |
4616 | set_window_update_flags (w, on_p) | |
4617 | struct window *w; | |
4618 | int on_p; | |
4619 | { | |
4620 | while (w) | |
4621 | { | |
4622 | if (!NILP (w->hchild)) | |
4623 | set_window_update_flags (XWINDOW (w->hchild), on_p); | |
4624 | else if (!NILP (w->vchild)) | |
4625 | set_window_update_flags (XWINDOW (w->vchild), on_p); | |
4626 | else | |
4627 | w->must_be_updated_p = on_p; | |
4628 | ||
4629 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
4630 | } | |
177c0ea7 | 4631 | } |
6df5d75f GM |
4632 | |
4633 | ||
4634 | \f | |
4635 | /*********************************************************************** | |
4636 | Window-Based Scrolling | |
4637 | ***********************************************************************/ | |
4638 | ||
4639 | /* Structure describing rows in scrolling_window. */ | |
4640 | ||
4641 | struct row_entry | |
4642 | { | |
4643 | /* Number of occurrences of this row in desired and current matrix. */ | |
4644 | int old_uses, new_uses; | |
177c0ea7 | 4645 | |
6df5d75f GM |
4646 | /* Vpos of row in new matrix. */ |
4647 | int new_line_number; | |
4648 | ||
4649 | /* Bucket index of this row_entry in the hash table row_table. */ | |
4650 | int bucket; | |
177c0ea7 | 4651 | |
6df5d75f GM |
4652 | /* The row described by this entry. */ |
4653 | struct glyph_row *row; | |
177c0ea7 | 4654 | |
6df5d75f GM |
4655 | /* Hash collision chain. */ |
4656 | struct row_entry *next; | |
4657 | }; | |
4658 | ||
4659 | /* A pool to allocate row_entry structures from, and the size of the | |
4660 | pool. The pool is reallocated in scrolling_window when we find | |
4661 | that we need a larger one. */ | |
4662 | ||
4663 | static struct row_entry *row_entry_pool; | |
4664 | static int row_entry_pool_size; | |
4665 | ||
4666 | /* Index of next free entry in row_entry_pool. */ | |
4667 | ||
4668 | static int row_entry_idx; | |
4669 | ||
4670 | /* The hash table used during scrolling, and the table's size. This | |
4671 | table is used to quickly identify equal rows in the desired and | |
4672 | current matrix. */ | |
4673 | ||
4674 | static struct row_entry **row_table; | |
4675 | static int row_table_size; | |
4676 | ||
4677 | /* Vectors of pointers to row_entry structures belonging to the | |
4678 | current and desired matrix, and the size of the vectors. */ | |
4679 | ||
4680 | static struct row_entry **old_lines, **new_lines; | |
4681 | static int old_lines_size, new_lines_size; | |
4682 | ||
4683 | /* A pool to allocate run structures from, and its size. */ | |
4684 | ||
4685 | static struct run *run_pool; | |
4686 | static int runs_size; | |
4687 | ||
4688 | /* A vector of runs of lines found during scrolling. */ | |
4689 | ||
4690 | static struct run **runs; | |
4691 | ||
6df5d75f GM |
4692 | /* Add glyph row ROW to the scrolling hash table during the scrolling |
4693 | of window W. */ | |
4694 | ||
4695 | static INLINE struct row_entry * | |
4696 | add_row_entry (w, row) | |
4697 | struct window *w; | |
4698 | struct glyph_row *row; | |
4699 | { | |
4700 | struct row_entry *entry; | |
4701 | int i = row->hash % row_table_size; | |
177c0ea7 | 4702 | |
6df5d75f | 4703 | entry = row_table[i]; |
e4e0bee9 | 4704 | while (entry && !row_equal_p (w, entry->row, row, 1)) |
6df5d75f | 4705 | entry = entry->next; |
177c0ea7 | 4706 | |
6df5d75f GM |
4707 | if (entry == NULL) |
4708 | { | |
4709 | entry = row_entry_pool + row_entry_idx++; | |
4710 | entry->row = row; | |
4711 | entry->old_uses = entry->new_uses = 0; | |
4712 | entry->new_line_number = 0; | |
4713 | entry->bucket = i; | |
4714 | entry->next = row_table[i]; | |
4715 | row_table[i] = entry; | |
4716 | } | |
4717 | ||
4718 | return entry; | |
4719 | } | |
4720 | ||
4721 | ||
5f5c8ee5 | 4722 | /* Try to reuse part of the current display of W by scrolling lines. |
153a073c | 4723 | HEADER_LINE_P non-zero means W has a header line. |
5f5c8ee5 GM |
4724 | |
4725 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4726 | Technique for Isolating Differences Between Files." It should take | |
4727 | O(N) time. | |
4728 | ||
4729 | A short outline of the steps of the algorithm | |
4730 | ||
4731 | 1. Skip lines equal at the start and end of both matrices. | |
4732 | ||
4733 | 2. Enter rows in the current and desired matrix into a symbol | |
4734 | table, counting how often they appear in both matrices. | |
4735 | ||
4736 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4737 | i.e. we assume that such lines are likely to have been moved. | |
4738 | ||
4739 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4740 | forward and backward. | |
4741 | ||
4742 | Value is | |
4743 | ||
4744 | -1 if all rows were found to be equal. | |
4745 | 0 to indicate that we did not scroll the display, or | |
4746 | 1 if we did scroll. */ | |
4747 | ||
4748 | static int | |
045dee35 | 4749 | scrolling_window (w, header_line_p) |
5f5c8ee5 | 4750 | struct window *w; |
045dee35 | 4751 | int header_line_p; |
4588ec20 | 4752 | { |
5f5c8ee5 GM |
4753 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4754 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4755 | int yb = window_text_bottom_y (w); | |
6df5d75f GM |
4756 | int i, j, first_old, first_new, last_old, last_new; |
4757 | int nruns, nbytes, n, run_idx; | |
4758 | struct row_entry *entry; | |
5f5c8ee5 GM |
4759 | |
4760 | /* Skip over rows equal at the start. */ | |
bfdcafe1 | 4761 | for (i = header_line_p ? 1 : 0; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4762 | { |
bfdcafe1 GM |
4763 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4764 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4765 | ||
4766 | if (c->enabled_p | |
4767 | && d->enabled_p | |
4768 | && c->y == d->y | |
4769 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4770 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
4771 | && row_equal_p (w, c, d, 1)) | |
4772 | { | |
4773 | assign_row (c, d); | |
4774 | d->enabled_p = 0; | |
4775 | } | |
4776 | else | |
4777 | break; | |
5f5c8ee5 | 4778 | } |
4588ec20 | 4779 | |
5f5c8ee5 GM |
4780 | /* Give up if some rows in the desired matrix are not enabled. */ |
4781 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4782 | return -1; | |
177c0ea7 | 4783 | |
5f5c8ee5 GM |
4784 | first_old = first_new = i; |
4785 | ||
4786 | /* Set last_new to the index + 1 of the last enabled row in the | |
4787 | desired matrix. */ | |
4788 | i = first_new + 1; | |
4789 | while (i < desired_matrix->nrows - 1 | |
4790 | && MATRIX_ROW (desired_matrix, i)->enabled_p | |
6df5d75f | 4791 | && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)) <= yb) |
5f5c8ee5 GM |
4792 | ++i; |
4793 | ||
4794 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4795 | return 0; | |
4796 | ||
4797 | last_new = i; | |
4798 | ||
4799 | /* Set last_old to the index + 1 of the last enabled row in the | |
4800 | current matrix. We don't look at the enabled flag here because | |
4801 | we plan to reuse part of the display even if other parts are | |
4802 | disabled. */ | |
4803 | i = first_old + 1; | |
93962bfa GM |
4804 | while (i < current_matrix->nrows - 1) |
4805 | { | |
4806 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4807 | if (bottom <= yb) | |
4808 | ++i; | |
4809 | if (bottom >= yb) | |
4810 | break; | |
4811 | } | |
4812 | ||
5f5c8ee5 GM |
4813 | last_old = i; |
4814 | ||
4815 | /* Skip over rows equal at the bottom. */ | |
4816 | i = last_new; | |
4817 | j = last_old; | |
4818 | while (i - 1 > first_new | |
4819 | && j - 1 > first_old | |
4820 | && MATRIX_ROW (current_matrix, i - 1)->enabled_p | |
4821 | && (MATRIX_ROW (current_matrix, i - 1)->y | |
4822 | == MATRIX_ROW (desired_matrix, j - 1)->y) | |
4823 | && row_equal_p (w, | |
4824 | MATRIX_ROW (desired_matrix, i - 1), | |
e4e0bee9 | 4825 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
4826 | --i, --j; |
4827 | last_new = i; | |
4828 | last_old = j; | |
4829 | ||
4830 | /* Nothing to do if all rows are equal. */ | |
4831 | if (last_new == first_new) | |
4832 | return 0; | |
4833 | ||
6df5d75f | 4834 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 4835 | |
6df5d75f GM |
4836 | if (current_matrix->nrows > old_lines_size) |
4837 | { | |
4838 | old_lines_size = current_matrix->nrows; | |
4839 | nbytes = old_lines_size * sizeof *old_lines; | |
4840 | old_lines = (struct row_entry **) xrealloc (old_lines, nbytes); | |
4841 | } | |
177c0ea7 | 4842 | |
6df5d75f GM |
4843 | if (desired_matrix->nrows > new_lines_size) |
4844 | { | |
4845 | new_lines_size = desired_matrix->nrows; | |
4846 | nbytes = new_lines_size * sizeof *new_lines; | |
4847 | new_lines = (struct row_entry **) xrealloc (new_lines, nbytes); | |
4848 | } | |
4849 | ||
4850 | n = desired_matrix->nrows + current_matrix->nrows; | |
4851 | if (3 * n > row_table_size) | |
4852 | { | |
4853 | row_table_size = next_almost_prime (3 * n); | |
4854 | nbytes = row_table_size * sizeof *row_table; | |
4855 | row_table = (struct row_entry **) xrealloc (row_table, nbytes); | |
4856 | bzero (row_table, nbytes); | |
4857 | } | |
4858 | ||
4859 | if (n > row_entry_pool_size) | |
4860 | { | |
4861 | row_entry_pool_size = n; | |
4862 | nbytes = row_entry_pool_size * sizeof *row_entry_pool; | |
4863 | row_entry_pool = (struct row_entry *) xrealloc (row_entry_pool, nbytes); | |
4864 | } | |
4865 | ||
4866 | if (desired_matrix->nrows > runs_size) | |
4867 | { | |
4868 | runs_size = desired_matrix->nrows; | |
4869 | nbytes = runs_size * sizeof *runs; | |
4870 | runs = (struct run **) xrealloc (runs, nbytes); | |
4871 | nbytes = runs_size * sizeof *run_pool; | |
4872 | run_pool = (struct run *) xrealloc (run_pool, nbytes); | |
4873 | } | |
4874 | ||
4875 | nruns = run_idx = 0; | |
4876 | row_entry_idx = 0; | |
4877 | ||
4878 | /* Add rows from the current and desired matrix to the hash table | |
4879 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 4880 | |
5f5c8ee5 GM |
4881 | for (i = first_old; i < last_old; ++i) |
4882 | { | |
4883 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
4884 | { | |
6df5d75f GM |
4885 | entry = add_row_entry (w, MATRIX_ROW (current_matrix, i)); |
4886 | old_lines[i] = entry; | |
4887 | ++entry->old_uses; | |
5f5c8ee5 GM |
4888 | } |
4889 | else | |
6df5d75f | 4890 | old_lines[i] = NULL; |
5f5c8ee5 GM |
4891 | } |
4892 | ||
5f5c8ee5 GM |
4893 | for (i = first_new; i < last_new; ++i) |
4894 | { | |
4895 | xassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); | |
6df5d75f GM |
4896 | entry = add_row_entry (w, MATRIX_ROW (desired_matrix, i)); |
4897 | ++entry->new_uses; | |
4898 | entry->new_line_number = i; | |
4899 | new_lines[i] = entry; | |
5f5c8ee5 | 4900 | } |
4588ec20 | 4901 | |
5f5c8ee5 GM |
4902 | /* Identify moves based on lines that are unique and equal |
4903 | in both matrices. */ | |
4904 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
4905 | if (old_lines[i] |
4906 | && old_lines[i]->old_uses == 1 | |
4907 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 GM |
4908 | { |
4909 | int j, k; | |
6df5d75f GM |
4910 | int new_line = old_lines[i]->new_line_number; |
4911 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
4912 | |
4913 | /* Record move. */ | |
4914 | run->current_vpos = i; | |
4915 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
4916 | run->desired_vpos = new_line; | |
4917 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
4918 | run->nrows = 1; | |
4919 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
4920 | ||
4921 | /* Extend backward. */ | |
4922 | j = i - 1; | |
4923 | k = new_line - 1; | |
4924 | while (j > first_old | |
4925 | && k > first_new | |
6df5d75f | 4926 | && old_lines[j] == new_lines[k]) |
5f5c8ee5 GM |
4927 | { |
4928 | int h = MATRIX_ROW (current_matrix, j)->height; | |
177c0ea7 JB |
4929 | --run->current_vpos; |
4930 | --run->desired_vpos; | |
5f5c8ee5 GM |
4931 | ++run->nrows; |
4932 | run->height += h; | |
4933 | run->desired_y -= h; | |
4934 | run->current_y -= h; | |
4935 | --j, --k; | |
4936 | } | |
4588ec20 | 4937 | |
5f5c8ee5 GM |
4938 | /* Extend forward. */ |
4939 | j = i + 1; | |
4940 | k = new_line + 1; | |
4941 | while (j < last_old | |
4942 | && k < last_new | |
6df5d75f | 4943 | && old_lines[j] == new_lines[k]) |
5f5c8ee5 GM |
4944 | { |
4945 | int h = MATRIX_ROW (current_matrix, j)->height; | |
177c0ea7 | 4946 | ++run->nrows; |
5f5c8ee5 GM |
4947 | run->height += h; |
4948 | ++j, ++k; | |
4949 | } | |
19dff8dc | 4950 | |
5f5c8ee5 GM |
4951 | /* Insert run into list of all runs. Order runs by copied |
4952 | pixel lines. Note that we record runs that don't have to | |
4953 | be copied because they are already in place. This is done | |
4954 | because we can avoid calling update_window_line in this | |
4955 | case. */ | |
4956 | for (j = 0; j < nruns && runs[j]->height > run->height; ++j) | |
4957 | ; | |
2b4ec4d7 | 4958 | for (k = nruns; k > j; --k) |
5f5c8ee5 GM |
4959 | runs[k] = runs[k - 1]; |
4960 | runs[j] = run; | |
4961 | ++nruns; | |
4962 | ||
4963 | i += run->nrows; | |
4964 | } | |
4965 | else | |
4966 | ++i; | |
4588ec20 | 4967 | |
5f5c8ee5 GM |
4968 | /* Do the moves. Do it in a way that we don't overwrite something |
4969 | we want to copy later on. This is not solvable in general | |
4970 | because there is only one display and we don't have a way to | |
4971 | exchange areas on this display. Example: | |
4588ec20 | 4972 | |
5f5c8ee5 GM |
4973 | +-----------+ +-----------+ |
4974 | | A | | B | | |
4975 | +-----------+ --> +-----------+ | |
4976 | | B | | A | | |
4977 | +-----------+ +-----------+ | |
4588ec20 | 4978 | |
5f5c8ee5 GM |
4979 | Instead, prefer bigger moves, and invalidate moves that would |
4980 | copy from where we copied to. */ | |
ea0d86af | 4981 | |
5f5c8ee5 GM |
4982 | for (i = 0; i < nruns; ++i) |
4983 | if (runs[i]->nrows > 0) | |
4984 | { | |
4985 | struct run *r = runs[i]; | |
24e86043 | 4986 | |
5f5c8ee5 GM |
4987 | /* Copy on the display. */ |
4988 | if (r->current_y != r->desired_y) | |
4989 | { | |
4990 | rif->scroll_run_hook (w, r); | |
4991 | ||
4992 | /* Invalidate runs that copy from where we copied to. */ | |
4993 | for (j = i + 1; j < nruns; ++j) | |
4994 | { | |
4995 | struct run *p = runs[j]; | |
177c0ea7 | 4996 | |
5f5c8ee5 GM |
4997 | if ((p->current_y >= r->desired_y |
4998 | && p->current_y < r->desired_y + r->height) | |
4999 | || (p->current_y + p->height >= r->desired_y | |
5000 | && (p->current_y + p->height | |
5001 | < r->desired_y + r->height))) | |
5002 | p->nrows = 0; | |
5003 | } | |
5004 | } | |
ea0d86af | 5005 | |
5f5c8ee5 GM |
5006 | /* Assign matrix rows. */ |
5007 | for (j = 0; j < r->nrows; ++j) | |
5008 | { | |
5009 | struct glyph_row *from, *to; | |
408f5064 | 5010 | int to_overlapped_p; |
e876ff42 | 5011 | |
5f5c8ee5 GM |
5012 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
5013 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 5014 | to_overlapped_p = to->overlapped_p; |
5f5c8ee5 GM |
5015 | assign_row (to, from); |
5016 | to->enabled_p = 1, from->enabled_p = 0; | |
408f5064 | 5017 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
5018 | } |
5019 | } | |
15874c59 | 5020 | |
6df5d75f GM |
5021 | /* Clear the hash table, for the next time. */ |
5022 | for (i = 0; i < row_entry_idx; ++i) | |
5023 | row_table[row_entry_pool[i].bucket] = NULL; | |
5024 | ||
5f5c8ee5 GM |
5025 | /* Value is non-zero to indicate that we scrolled the display. */ |
5026 | return 1; | |
5027 | } | |
de83c314 | 5028 | |
15874c59 | 5029 | |
4588ec20 | 5030 | \f |
5f5c8ee5 GM |
5031 | /************************************************************************ |
5032 | Frame-Based Updates | |
5033 | ************************************************************************/ | |
4588ec20 | 5034 | |
5f5c8ee5 | 5035 | /* Update the desired frame matrix of frame F. |
4588ec20 | 5036 | |
5f5c8ee5 GM |
5037 | FORCE_P non-zero means that the update should not be stopped by |
5038 | pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling | |
5039 | should not be tried. | |
5040 | ||
5041 | Value is non-zero if update was stopped due to pending input. */ | |
5042 | ||
5043 | static int | |
5044 | update_frame_1 (f, force_p, inhibit_id_p) | |
5045 | struct frame *f; | |
5046 | int force_p; | |
5047 | int inhibit_id_p; | |
4588ec20 | 5048 | { |
5f5c8ee5 GM |
5049 | /* Frame matrices to work on. */ |
5050 | struct glyph_matrix *current_matrix = f->current_matrix; | |
5051 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5052 | int i; | |
4588ec20 JB |
5053 | int pause; |
5054 | int preempt_count = baud_rate / 2400 + 1; | |
dfcf069d | 5055 | extern int input_pending; |
5f5c8ee5 GM |
5056 | |
5057 | xassert (current_matrix && desired_matrix); | |
4588ec20 | 5058 | |
c37e4889 RS |
5059 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
5060 | calculate_costs (f); | |
5061 | ||
d88c2b9e RS |
5062 | if (preempt_count <= 0) |
5063 | preempt_count = 1; | |
5064 | ||
e7067d00 GM |
5065 | if (redisplay_dont_pause) |
5066 | force_p = 1; | |
5067 | else if (!force_p && detect_input_pending ()) | |
4588ec20 JB |
5068 | { |
5069 | pause = 1; | |
5070 | goto do_pause; | |
5071 | } | |
5072 | ||
5f5c8ee5 | 5073 | /* If we cannot insert/delete lines, it's no use trying it. */ |
4588ec20 | 5074 | if (!line_ins_del_ok) |
5f5c8ee5 | 5075 | inhibit_id_p = 1; |
7098a0fa | 5076 | |
efb859b4 | 5077 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
5078 | i/d line if just want cursor motion. */ |
5079 | for (i = 0; i < desired_matrix->nrows; i++) | |
5080 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
5081 | break; |
5082 | ||
5083 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
5084 | if (!inhibit_id_p && i < desired_matrix->nrows) |
5085 | force_p |= scrolling (f); | |
4588ec20 JB |
5086 | |
5087 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
5088 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
5089 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 5090 | |
5f5c8ee5 GM |
5091 | /* Now update the rest of the lines. */ |
5092 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 5093 | { |
5f5c8ee5 | 5094 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 5095 | { |
b6a65ac2 | 5096 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
5097 | { |
5098 | /* Flush out every so many lines. | |
5099 | Also flush out if likely to have more than 1k buffered | |
5100 | otherwise. I'm told that some telnet connections get | |
5101 | really screwed by more than 1k output at once. */ | |
5102 | int outq = PENDING_OUTPUT_COUNT (stdout); | |
5103 | if (outq > 900 | |
5104 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
5105 | { | |
5106 | fflush (stdout); | |
5107 | if (preempt_count == 1) | |
5108 | { | |
a41f8bed JB |
5109 | #ifdef EMACS_OUTQSIZE |
5110 | if (EMACS_OUTQSIZE (0, &outq) < 0) | |
4588ec20 | 5111 | /* Probably not a tty. Ignore the error and reset |
153a073c | 5112 | the outq count. */ |
4588ec20 JB |
5113 | outq = PENDING_OUTPUT_COUNT (stdout); |
5114 | #endif | |
5115 | outq *= 10; | |
d520f0d2 | 5116 | if (baud_rate <= outq && baud_rate > 0) |
d88c2b9e | 5117 | sleep (outq / baud_rate); |
4588ec20 JB |
5118 | } |
5119 | } | |
4588ec20 JB |
5120 | } |
5121 | ||
a2960116 RS |
5122 | if ((i - 1) % preempt_count == 0) |
5123 | detect_input_pending (); | |
5124 | ||
5f5c8ee5 | 5125 | update_frame_line (f, i); |
4588ec20 | 5126 | } |
4588ec20 | 5127 | } |
177c0ea7 | 5128 | |
7df02016 | 5129 | pause = (i < FRAME_LINES (f) - 1) ? i : 0; |
4588ec20 JB |
5130 | |
5131 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
5132 | if (!pause) | |
5133 | { | |
48cf7030 | 5134 | if ((cursor_in_echo_area |
5f5c8ee5 | 5135 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 5136 | show the cursor for the message instead of for the |
5f5c8ee5 | 5137 | (now hidden) mini-buffer contents. */ |
2577053b RS |
5138 | || (EQ (minibuf_window, selected_window) |
5139 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 5140 | && !NILP (echo_area_buffer[0]))) |
2577053b | 5141 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 5142 | the active mini-buffer window. */ |
2577053b | 5143 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 5144 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 5145 | { |
7df02016 | 5146 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
5147 | int row, col; |
5148 | ||
5149 | if (cursor_in_echo_area < 0) | |
5150 | { | |
5f5c8ee5 GM |
5151 | /* Negative value of cursor_in_echo_area means put |
5152 | cursor at beginning of line. */ | |
648fa17d JB |
5153 | row = top; |
5154 | col = 0; | |
5155 | } | |
1113d9db | 5156 | else |
648fa17d | 5157 | { |
5f5c8ee5 GM |
5158 | /* Positive value of cursor_in_echo_area means put |
5159 | cursor at the end of the prompt. If the mini-buffer | |
5160 | is several lines high, find the last line that has | |
5161 | any text on it. */ | |
7df02016 | 5162 | row = FRAME_LINES (f); |
177c0ea7 | 5163 | do |
648fa17d | 5164 | { |
5f5c8ee5 GM |
5165 | --row; |
5166 | col = 0; | |
177c0ea7 | 5167 | |
5f5c8ee5 GM |
5168 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
5169 | { | |
5170 | /* Frame rows are filled up with spaces that | |
5171 | must be ignored here. */ | |
5f5c8ee5 GM |
5172 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
5173 | row); | |
5174 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
5175 | struct glyph *last = start + r->used[TEXT_AREA]; | |
5176 | ||
5177 | while (last > start | |
5178 | && (last - 1)->charpos < 0) | |
5179 | --last; | |
177c0ea7 | 5180 | |
5f5c8ee5 GM |
5181 | col = last - start; |
5182 | } | |
648fa17d JB |
5183 | } |
5184 | while (row > top && col == 0); | |
5185 | ||
6395da5c | 5186 | /* Make sure COL is not out of range. */ |
868e640e | 5187 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 5188 | { |
6395da5c | 5189 | /* If we have another row, advance cursor into it. */ |
7df02016 | 5190 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 5191 | { |
7df02016 | 5192 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
5193 | row++; |
5194 | } | |
5195 | /* Otherwise move it back in range. */ | |
5196 | else | |
868e640e | 5197 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
5198 | } |
5199 | } | |
5200 | ||
5201 | cursor_to (row, col); | |
1113d9db | 5202 | } |
4588ec20 | 5203 | else |
5f5c8ee5 GM |
5204 | { |
5205 | /* We have only one cursor on terminal frames. Use it to | |
5206 | display the cursor of the selected window. */ | |
5207 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
5208 | if (w->cursor.vpos >= 0 |
5209 | /* The cursor vpos may be temporarily out of bounds | |
5210 | in the following situation: There is one window, | |
5211 | with the cursor in the lower half of it. The window | |
5212 | is split, and a message causes a redisplay before | |
5213 | a new cursor position has been computed. */ | |
7df02016 | 5214 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
5215 | { |
5216 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
5217 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
5218 | ||
7df02016 KS |
5219 | if (INTEGERP (w->left_margin_cols)) |
5220 | x += XFASTINT (w->left_margin_cols); | |
177c0ea7 | 5221 | |
7df02016 | 5222 | /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */ |
5f5c8ee5 GM |
5223 | cursor_to (y, x); |
5224 | } | |
5225 | } | |
4588ec20 JB |
5226 | } |
5227 | ||
4588ec20 JB |
5228 | do_pause: |
5229 | ||
5f5c8ee5 | 5230 | clear_desired_matrices (f); |
4588ec20 JB |
5231 | return pause; |
5232 | } | |
5233 | ||
4588ec20 | 5234 | |
5f5c8ee5 | 5235 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 5236 | |
dfcf069d | 5237 | int |
502b9b64 | 5238 | scrolling (frame) |
5f5c8ee5 | 5239 | struct frame *frame; |
4588ec20 JB |
5240 | { |
5241 | int unchanged_at_top, unchanged_at_bottom; | |
5242 | int window_size; | |
5243 | int changed_lines; | |
7df02016 KS |
5244 | int *old_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); |
5245 | int *new_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
5246 | int *draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
5247 | int *old_draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 5248 | register int i; |
7df02016 | 5249 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
5250 | struct glyph_matrix *current_matrix = frame->current_matrix; |
5251 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 5252 | |
5f5c8ee5 GM |
5253 | if (!current_matrix) |
5254 | abort (); | |
4588ec20 | 5255 | |
5f5c8ee5 GM |
5256 | /* Compute hash codes of all the lines. Also calculate number of |
5257 | changed lines, number of unchanged lines at the beginning, and | |
5258 | number of unchanged lines at the end. */ | |
4588ec20 JB |
5259 | changed_lines = 0; |
5260 | unchanged_at_top = 0; | |
7df02016 KS |
5261 | unchanged_at_bottom = FRAME_LINES (frame); |
5262 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
5263 | { |
5264 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 5265 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 5266 | return 0; |
5f5c8ee5 GM |
5267 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
5268 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
5269 | { |
5270 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
5271 | new_hash[i] = old_hash[i]; | |
5272 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
5273 | draw_cost[i] = INFINITY; | |
5274 | } | |
4588ec20 | 5275 | else |
f188b3c4 | 5276 | { |
5f5c8ee5 GM |
5277 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
5278 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 5279 | } |
4588ec20 JB |
5280 | |
5281 | if (old_hash[i] != new_hash[i]) | |
5282 | { | |
5283 | changed_lines++; | |
7df02016 | 5284 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
5285 | } |
5286 | else if (i == unchanged_at_top) | |
5287 | unchanged_at_top++; | |
5f5c8ee5 | 5288 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
5289 | } |
5290 | ||
5291 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
5f5c8ee5 | 5292 | if ((!scroll_region_ok && changed_lines < baud_rate / 2400) |
7df02016 | 5293 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
5294 | return 1; |
5295 | ||
7df02016 | 5296 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
5297 | - unchanged_at_bottom); |
5298 | ||
5299 | if (scroll_region_ok) | |
5300 | free_at_end_vpos -= unchanged_at_bottom; | |
502b9b64 | 5301 | else if (memory_below_frame) |
4588ec20 JB |
5302 | free_at_end_vpos = -1; |
5303 | ||
5304 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 5305 | current frame and desired frame, don't bother with i/d calc. */ |
190bb91a | 5306 | if (!scroll_region_ok && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
5307 | && (window_size >= |
5308 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 5309 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
5310 | old_hash, new_hash, draw_cost))) |
5311 | return 0; | |
5312 | ||
5f5c8ee5 GM |
5313 | if (window_size < 2) |
5314 | return 0; | |
5315 | ||
502b9b64 | 5316 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 5317 | draw_cost + unchanged_at_top - 1, |
190bb91a | 5318 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
5319 | old_hash + unchanged_at_top - 1, |
5320 | new_hash + unchanged_at_top - 1, | |
5321 | free_at_end_vpos - unchanged_at_top); | |
5322 | ||
5323 | return 0; | |
5324 | } | |
4588ec20 | 5325 | |
4588ec20 | 5326 | |
5f5c8ee5 GM |
5327 | /* Count the number of blanks at the start of the vector of glyphs R |
5328 | which is LEN glyphs long. */ | |
4588ec20 | 5329 | |
4588ec20 | 5330 | static int |
5f5c8ee5 GM |
5331 | count_blanks (r, len) |
5332 | struct glyph *r; | |
5333 | int len; | |
4588ec20 | 5334 | { |
5f5c8ee5 | 5335 | int i; |
177c0ea7 | 5336 | |
5f5c8ee5 GM |
5337 | for (i = 0; i < len; ++i) |
5338 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
5339 | break; | |
5340 | ||
5341 | return i; | |
4588ec20 JB |
5342 | } |
5343 | ||
5f5c8ee5 GM |
5344 | |
5345 | /* Count the number of glyphs in common at the start of the glyph | |
5346 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
5347 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
5348 | ||
4588ec20 | 5349 | static int |
5f5c8ee5 GM |
5350 | count_match (str1, end1, str2, end2) |
5351 | struct glyph *str1, *end1, *str2, *end2; | |
4588ec20 | 5352 | { |
5f5c8ee5 GM |
5353 | struct glyph *p1 = str1; |
5354 | struct glyph *p2 = str2; | |
177c0ea7 | 5355 | |
5f5c8ee5 GM |
5356 | while (p1 < end1 |
5357 | && p2 < end2 | |
42186983 | 5358 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 5359 | ++p1, ++p2; |
177c0ea7 | 5360 | |
5f5c8ee5 | 5361 | return p1 - str1; |
4588ec20 JB |
5362 | } |
5363 | ||
5f5c8ee5 | 5364 | |
4588ec20 | 5365 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 5366 | |
5f5c8ee5 | 5367 | extern int *char_ins_del_vector; |
7df02016 | 5368 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))]) |
4588ec20 | 5369 | |
5f5c8ee5 GM |
5370 | |
5371 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
5372 | ||
4588ec20 | 5373 | static void |
c363a1d6 GM |
5374 | update_frame_line (f, vpos) |
5375 | struct frame *f; | |
4588ec20 JB |
5376 | int vpos; |
5377 | { | |
5f5c8ee5 | 5378 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
5379 | int tem; |
5380 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
5381 | struct glyph_matrix *current_matrix = f->current_matrix; |
5382 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
5383 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
5384 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
5385 | int must_write_whole_line_p; | |
0a894bad | 5386 | int write_spaces_p = must_write_spaces; |
c363a1d6 | 5387 | int colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background |
0a894bad GM |
5388 | != FACE_TTY_DEFAULT_BG_COLOR); |
5389 | ||
5390 | if (colored_spaces_p) | |
5391 | write_spaces_p = 1; | |
5f5c8ee5 | 5392 | |
26c63686 GM |
5393 | /* Current row not enabled means it has unknown contents. We must |
5394 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
5395 | must_write_whole_line_p = !current_row->enabled_p; |
5396 | if (must_write_whole_line_p) | |
4588ec20 | 5397 | { |
5f5c8ee5 | 5398 | obody = 0; |
4588ec20 JB |
5399 | olen = 0; |
5400 | } | |
5401 | else | |
5402 | { | |
5f5c8ee5 GM |
5403 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
5404 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 5405 | |
4cecaab8 MB |
5406 | /* Ignore trailing spaces, if we can. */ |
5407 | if (!write_spaces_p) | |
5408 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
5409 | olen--; | |
4588ec20 JB |
5410 | } |
5411 | ||
5f5c8ee5 GM |
5412 | current_row->enabled_p = 1; |
5413 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 5414 | |
5f5c8ee5 GM |
5415 | /* If desired line is empty, just clear the line. */ |
5416 | if (!desired_row->enabled_p) | |
4588ec20 JB |
5417 | { |
5418 | nlen = 0; | |
5419 | goto just_erase; | |
5420 | } | |
5421 | ||
5f5c8ee5 GM |
5422 | nbody = desired_row->glyphs[TEXT_AREA]; |
5423 | nlen = desired_row->used[TEXT_AREA]; | |
5424 | nend = nbody + nlen; | |
5425 | ||
5426 | /* If display line has unknown contents, write the whole line. */ | |
5427 | if (must_write_whole_line_p) | |
5428 | { | |
26c63686 | 5429 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 5430 | if (!write_spaces_p) |
74ca462f GM |
5431 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
5432 | --nlen; | |
5433 | ||
26c63686 | 5434 | /* Write the contents of the desired line. */ |
74ca462f | 5435 | if (nlen) |
26c63686 GM |
5436 | { |
5437 | cursor_to (vpos, 0); | |
5438 | write_glyphs (nbody, nlen); | |
5439 | } | |
177c0ea7 | 5440 | |
26c63686 GM |
5441 | /* Don't call clear_end_of_line if we already wrote the whole |
5442 | line. The cursor will not be at the right margin in that | |
5443 | case but in the line below. */ | |
7df02016 | 5444 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 GM |
5445 | { |
5446 | cursor_to (vpos, nlen); | |
7df02016 | 5447 | clear_end_of_line (FRAME_TOTAL_COLS (f)); |
26c63686 | 5448 | } |
58827478 GM |
5449 | else |
5450 | /* Make sure we are in the right row, otherwise cursor movement | |
5451 | with cmgoto might use `ch' in the wrong row. */ | |
5452 | cursor_to (vpos, 0); | |
177c0ea7 | 5453 | |
5f5c8ee5 GM |
5454 | make_current (desired_matrix, current_matrix, vpos); |
5455 | return; | |
5456 | } | |
4588ec20 JB |
5457 | |
5458 | /* Pretend trailing spaces are not there at all, | |
5459 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
5460 | if (!write_spaces_p) |
5461 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
5462 | nlen--; | |
4588ec20 JB |
5463 | |
5464 | /* If there's no i/d char, quickly do the best we can without it. */ | |
5465 | if (!char_ins_del_ok) | |
5466 | { | |
5f5c8ee5 | 5467 | int i, j; |
4588ec20 | 5468 | |
5f5c8ee5 GM |
5469 | /* Find the first glyph in desired row that doesn't agree with |
5470 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
5471 | for (i = 0; i < nlen; i++) |
5472 | { | |
5f5c8ee5 | 5473 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 5474 | { |
5f5c8ee5 GM |
5475 | /* Find the end of the run of different glyphs. */ |
5476 | j = i + 1; | |
5477 | while (j < nlen | |
5478 | && (j >= olen | |
5479 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
5480 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
5481 | ++j; | |
177c0ea7 JB |
5482 | |
5483 | /* Output this run of non-matching chars. */ | |
5f5c8ee5 GM |
5484 | cursor_to (vpos, i); |
5485 | write_glyphs (nbody + i, j - i); | |
5486 | i = j - 1; | |
4588ec20 JB |
5487 | |
5488 | /* Now find the next non-match. */ | |
5489 | } | |
5490 | } | |
5491 | ||
5492 | /* Clear the rest of the line, or the non-clear part of it. */ | |
5493 | if (olen > nlen) | |
5494 | { | |
5495 | cursor_to (vpos, nlen); | |
5496 | clear_end_of_line (olen); | |
5497 | } | |
5498 | ||
5f5c8ee5 GM |
5499 | /* Make current row = desired row. */ |
5500 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
5501 | return; |
5502 | } | |
5503 | ||
5f5c8ee5 GM |
5504 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
5505 | characters in a row. */ | |
5506 | ||
4588ec20 JB |
5507 | if (!olen) |
5508 | { | |
5f5c8ee5 GM |
5509 | /* If current line is blank, skip over initial spaces, if |
5510 | possible, and write the rest. */ | |
4cecaab8 | 5511 | if (write_spaces_p) |
5f5c8ee5 GM |
5512 | nsp = 0; |
5513 | else | |
5514 | nsp = count_blanks (nbody, nlen); | |
5515 | ||
4588ec20 JB |
5516 | if (nlen > nsp) |
5517 | { | |
5518 | cursor_to (vpos, nsp); | |
5519 | write_glyphs (nbody + nsp, nlen - nsp); | |
5520 | } | |
5521 | ||
502b9b64 | 5522 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 5523 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
5524 | return; |
5525 | } | |
5526 | ||
4588ec20 | 5527 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 5528 | osp = count_blanks (obody, olen); |
4cecaab8 | 5529 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 5530 | |
5f5c8ee5 GM |
5531 | /* Compute number of matching chars starting with first non-blank. */ |
5532 | begmatch = count_match (obody + osp, obody + olen, | |
5533 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
5534 | |
5535 | /* Spaces in new match implicit space past the end of old. */ | |
5536 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 5537 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
5538 | { |
5539 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
5540 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
5541 | ++begmatch; | |
4588ec20 JB |
5542 | } |
5543 | ||
5544 | /* Avoid doing insert/delete char | |
5545 | just cause number of leading spaces differs | |
5f5c8ee5 | 5546 | when the following text does not match. */ |
4588ec20 JB |
5547 | if (begmatch == 0 && osp != nsp) |
5548 | osp = nsp = min (osp, nsp); | |
5549 | ||
5550 | /* Find matching characters at end of line */ | |
5551 | op1 = obody + olen; | |
5552 | np1 = nbody + nlen; | |
5553 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
5554 | while (op1 > op2 |
5555 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
5556 | { |
5557 | op1--; | |
5558 | np1--; | |
5559 | } | |
5560 | endmatch = obody + olen - op1; | |
5561 | ||
4588ec20 JB |
5562 | /* tem gets the distance to insert or delete. |
5563 | endmatch is how many characters we save by doing so. | |
5564 | Is it worth it? */ | |
5565 | ||
5566 | tem = (nlen - nsp) - (olen - osp); | |
5567 | if (endmatch && tem | |
c363a1d6 | 5568 | && (!char_ins_del_ok || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
5569 | endmatch = 0; |
5570 | ||
5571 | /* nsp - osp is the distance to insert or delete. | |
5572 | If that is nonzero, begmatch is known to be nonzero also. | |
5573 | begmatch + endmatch is how much we save by doing the ins/del. | |
5574 | Is it worth it? */ | |
5575 | ||
5576 | if (nsp != osp | |
5577 | && (!char_ins_del_ok | |
c363a1d6 | 5578 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
5579 | { |
5580 | begmatch = 0; | |
5581 | endmatch = 0; | |
5582 | osp = nsp = min (osp, nsp); | |
5583 | } | |
5584 | ||
5585 | /* Now go through the line, inserting, writing and | |
5586 | deleting as appropriate. */ | |
5587 | ||
5588 | if (osp > nsp) | |
5589 | { | |
5590 | cursor_to (vpos, nsp); | |
5591 | delete_glyphs (osp - nsp); | |
5592 | } | |
5593 | else if (nsp > osp) | |
5594 | { | |
5595 | /* If going to delete chars later in line | |
5596 | and insert earlier in the line, | |
5597 | must delete first to avoid losing data in the insert */ | |
5598 | if (endmatch && nlen < olen + nsp - osp) | |
5599 | { | |
5600 | cursor_to (vpos, nlen - endmatch + osp - nsp); | |
5601 | delete_glyphs (olen + nsp - osp - nlen); | |
5602 | olen = nlen - (nsp - osp); | |
5603 | } | |
5604 | cursor_to (vpos, osp); | |
5f5c8ee5 | 5605 | insert_glyphs (0, nsp - osp); |
4588ec20 JB |
5606 | } |
5607 | olen += nsp - osp; | |
5608 | ||
5609 | tem = nsp + begmatch + endmatch; | |
5610 | if (nlen != tem || olen != tem) | |
5611 | { | |
4588ec20 JB |
5612 | if (!endmatch || nlen == olen) |
5613 | { | |
c363a1d6 GM |
5614 | /* If new text being written reaches right margin, there is |
5615 | no need to do clear-to-eol at the end of this function | |
5616 | (and it would not be safe, since cursor is not going to | |
5617 | be "at the margin" after the text is done). */ | |
7df02016 | 5618 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 5619 | olen = 0; |
c363a1d6 GM |
5620 | |
5621 | /* Function write_glyphs is prepared to do nothing | |
5622 | if passed a length <= 0. Check it here to avoid | |
5623 | unnecessary cursor movement. */ | |
5624 | if (nlen - tem > 0) | |
5625 | { | |
5626 | cursor_to (vpos, nsp + begmatch); | |
5627 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
5628 | } | |
4588ec20 JB |
5629 | } |
5630 | else if (nlen > olen) | |
5631 | { | |
24e86043 KH |
5632 | /* Here, we used to have the following simple code: |
5633 | ---------------------------------------- | |
5634 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
5635 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
5636 | ---------------------------------------- | |
5637 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
5638 | is a padding glyph. */ | |
5639 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
5640 | int del; | |
5f5c8ee5 | 5641 | |
c363a1d6 | 5642 | cursor_to (vpos, nsp + begmatch); |
177c0ea7 | 5643 | |
5f5c8ee5 | 5644 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
5645 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
5646 | out--; | |
5f5c8ee5 | 5647 | write_glyphs (nbody + nsp + begmatch, out); |
177c0ea7 | 5648 | |
5f5c8ee5 GM |
5649 | /* If we left columns to be overwritten, we must delete them. */ |
5650 | del = olen - tem - out; | |
c363a1d6 GM |
5651 | if (del > 0) |
5652 | delete_glyphs (del); | |
177c0ea7 | 5653 | |
5f5c8ee5 GM |
5654 | /* At last, we insert columns not yet written out. */ |
5655 | insert_glyphs (nbody + nsp + begmatch + out, nlen - olen + del); | |
5656 | olen = nlen; | |
5657 | } | |
5658 | else if (olen > nlen) | |
5659 | { | |
c363a1d6 | 5660 | cursor_to (vpos, nsp + begmatch); |
5f5c8ee5 GM |
5661 | write_glyphs (nbody + nsp + begmatch, nlen - tem); |
5662 | delete_glyphs (olen - nlen); | |
5663 | olen = nlen; | |
5664 | } | |
bd9e3e75 | 5665 | } |
5f5c8ee5 GM |
5666 | |
5667 | just_erase: | |
5668 | /* If any unerased characters remain after the new line, erase them. */ | |
5669 | if (olen > nlen) | |
078b3696 | 5670 | { |
5f5c8ee5 GM |
5671 | cursor_to (vpos, nlen); |
5672 | clear_end_of_line (olen); | |
078b3696 | 5673 | } |
5f5c8ee5 GM |
5674 | |
5675 | /* Exchange contents between current_frame and new_frame. */ | |
5676 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5677 | } |
5f5c8ee5 GM |
5678 | |
5679 | ||
078b3696 | 5680 | \f |
5f5c8ee5 GM |
5681 | /*********************************************************************** |
5682 | X/Y Position -> Buffer Position | |
5683 | ***********************************************************************/ | |
5684 | ||
a1b0a6db GM |
5685 | /* Determine what's under window-relative pixel position (*X, *Y). |
5686 | Return in *OBJECT the object (string or buffer) that's there. | |
5687 | Return in *POS the position in that object. Adjust *X and *Y | |
5688 | to character boundaries. */ | |
5f5c8ee5 | 5689 | |
a1b0a6db GM |
5690 | void |
5691 | buffer_posn_from_coords (w, x, y, object, pos) | |
5f5c8ee5 GM |
5692 | struct window *w; |
5693 | int *x, *y; | |
a1b0a6db GM |
5694 | Lisp_Object *object; |
5695 | struct display_pos *pos; | |
4588ec20 | 5696 | { |
5f5c8ee5 GM |
5697 | struct it it; |
5698 | struct buffer *old_current_buffer = current_buffer; | |
5699 | struct text_pos startp; | |
5700 | int left_area_width; | |
5701 | ||
5702 | current_buffer = XBUFFER (w->buffer); | |
5703 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
5704 | CHARPOS (startp) = min (ZV, max (BEGV, CHARPOS (startp))); | |
5705 | BYTEPOS (startp) = min (ZV_BYTE, max (BEGV_BYTE, BYTEPOS (startp))); | |
5706 | start_display (&it, w, startp); | |
177c0ea7 | 5707 | |
7df02016 | 5708 | left_area_width = WINDOW_LEFT_MARGIN_WIDTH (w); |
5f5c8ee5 GM |
5709 | move_it_to (&it, -1, *x + it.first_visible_x - left_area_width, *y, -1, |
5710 | MOVE_TO_X | MOVE_TO_Y); | |
177c0ea7 | 5711 | |
5f5c8ee5 GM |
5712 | *x = it.current_x - it.first_visible_x + left_area_width; |
5713 | *y = it.current_y; | |
5714 | current_buffer = old_current_buffer; | |
a1b0a6db GM |
5715 | |
5716 | *object = STRINGP (it.string) ? it.string : w->buffer; | |
5717 | *pos = it.current; | |
5f5c8ee5 | 5718 | } |
4588ec20 | 5719 | |
5f5c8ee5 GM |
5720 | |
5721 | /* Value is the string under window-relative coordinates X/Y in the | |
153a073c | 5722 | mode or header line of window W, or nil if none. MODE_LINE_P non-zero |
5f5c8ee5 GM |
5723 | means look at the mode line. *CHARPOS is set to the position in |
5724 | the string returned. */ | |
5725 | ||
5726 | Lisp_Object | |
641bdbf3 | 5727 | mode_line_string (w, x, y, part, charpos) |
5f5c8ee5 | 5728 | struct window *w; |
641bdbf3 KS |
5729 | int x, y; |
5730 | enum window_part part; | |
5f5c8ee5 GM |
5731 | int *charpos; |
5732 | { | |
5733 | struct glyph_row *row; | |
5734 | struct glyph *glyph, *end; | |
5f5c8ee5 GM |
5735 | int x0; |
5736 | Lisp_Object string = Qnil; | |
5737 | ||
641bdbf3 | 5738 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
5739 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
5740 | else | |
045dee35 | 5741 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
5f5c8ee5 GM |
5742 | |
5743 | if (row->mode_line_p && row->enabled_p) | |
4588ec20 | 5744 | { |
5f5c8ee5 GM |
5745 | /* Find the glyph under X. If we find one with a string object, |
5746 | it's the one we were looking for. */ | |
5747 | glyph = row->glyphs[TEXT_AREA]; | |
5748 | end = glyph + row->used[TEXT_AREA]; | |
5749 | for (x0 = 0; glyph < end; x0 += glyph->pixel_width, ++glyph) | |
5750 | if (x >= x0 && x < x0 + glyph->pixel_width) | |
5751 | { | |
5752 | string = glyph->object; | |
5753 | *charpos = glyph->charpos; | |
5754 | break; | |
5755 | } | |
4588ec20 | 5756 | } |
5f5c8ee5 GM |
5757 | |
5758 | return string; | |
4588ec20 | 5759 | } |
5f5c8ee5 GM |
5760 | |
5761 | ||
db1db309 GM |
5762 | /* Value is the string under window-relative coordinates X/Y in either |
5763 | marginal area, or nil if none. *CHARPOS is set to the position in | |
5764 | the string returned. */ | |
5765 | ||
5766 | Lisp_Object | |
641bdbf3 | 5767 | marginal_area_string (w, x, y, part, charpos) |
db1db309 GM |
5768 | struct window *w; |
5769 | int x, y; | |
641bdbf3 | 5770 | enum window_part part; |
521069b9 | 5771 | int *charpos; |
db1db309 GM |
5772 | { |
5773 | struct glyph_row *row = w->current_matrix->rows; | |
5774 | struct glyph *glyph, *end; | |
5775 | int x0, i, wy = y; | |
641bdbf3 | 5776 | int area; |
db1db309 GM |
5777 | Lisp_Object string = Qnil; |
5778 | ||
641bdbf3 | 5779 | if (part == ON_LEFT_MARGIN) |
db1db309 | 5780 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 5781 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
5782 | area = RIGHT_MARGIN_AREA; |
5783 | else | |
5784 | abort (); | |
5785 | ||
5786 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
5787 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
5788 | break; | |
5789 | ||
5790 | if (row->enabled_p) | |
5791 | { | |
5792 | /* Find the glyph under X. If we find one with a string object, | |
5793 | it's the one we were looking for. */ | |
5794 | glyph = row->glyphs[area]; | |
5795 | end = glyph + row->used[area]; | |
7df02016 | 5796 | |
db1db309 | 5797 | if (area == RIGHT_MARGIN_AREA) |
7df02016 KS |
5798 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
5799 | ? WINDOW_LEFT_FRINGE_WIDTH (w) | |
5800 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) | |
5801 | + window_box_width (w, LEFT_MARGIN_AREA) | |
5802 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 5803 | else |
7df02016 KS |
5804 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
5805 | ? WINDOW_LEFT_FRINGE_WIDTH (w) | |
5806 | : 0); | |
5807 | ||
db1db309 GM |
5808 | for (; glyph < end; x0 += glyph->pixel_width, ++glyph) |
5809 | if (x >= x0 && x < x0 + glyph->pixel_width) | |
5810 | { | |
5811 | string = glyph->object; | |
5812 | *charpos = glyph->charpos; | |
5813 | break; | |
5814 | } | |
5815 | } | |
5816 | ||
5817 | return string; | |
5818 | } | |
5819 | ||
5820 | ||
5f5c8ee5 GM |
5821 | /*********************************************************************** |
5822 | Changing Frame Sizes | |
5823 | ***********************************************************************/ | |
4588ec20 JB |
5824 | |
5825 | #ifdef SIGWINCH | |
5f5c8ee5 | 5826 | |
efb859b4 | 5827 | SIGTYPE |
61cbef47 | 5828 | window_change_signal (signalnum) /* If we don't have an argument, */ |
5f5c8ee5 | 5829 | int signalnum; /* some compilers complain in signal calls. */ |
4588ec20 JB |
5830 | { |
5831 | int width, height; | |
d43721a2 | 5832 | #ifndef USE_CRT_DLL |
4588ec20 | 5833 | extern int errno; |
d43721a2 | 5834 | #endif |
4588ec20 JB |
5835 | int old_errno = errno; |
5836 | ||
502b9b64 | 5837 | get_frame_size (&width, &height); |
4588ec20 | 5838 | |
502b9b64 JB |
5839 | /* The frame size change obviously applies to a termcap-controlled |
5840 | frame. Find such a frame in the list, and assume it's the only | |
4588ec20 | 5841 | one (since the redisplay code always writes to stdout, not a |
502b9b64 | 5842 | FILE * specified in the frame structure). Record the new size, |
4588ec20 JB |
5843 | but don't reallocate the data structures now. Let that be done |
5844 | later outside of the signal handler. */ | |
5845 | ||
5846 | { | |
35f56f96 | 5847 | Lisp_Object tail, frame; |
4588ec20 | 5848 | |
35f56f96 | 5849 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5850 | { |
35f56f96 | 5851 | if (FRAME_TERMCAP_P (XFRAME (frame))) |
4588ec20 | 5852 | { |
b96fd3e8 | 5853 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); |
4588ec20 JB |
5854 | break; |
5855 | } | |
5856 | } | |
5857 | } | |
5858 | ||
5859 | signal (SIGWINCH, window_change_signal); | |
5860 | errno = old_errno; | |
5861 | } | |
5862 | #endif /* SIGWINCH */ | |
5863 | ||
5864 | ||
b96fd3e8 GM |
5865 | /* Do any change in frame size that was requested by a signal. SAFE |
5866 | non-zero means this function is called from a place where it is | |
5867 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 5868 | |
dfcf069d | 5869 | void |
b96fd3e8 GM |
5870 | do_pending_window_change (safe) |
5871 | int safe; | |
4588ec20 JB |
5872 | { |
5873 | /* If window_change_signal should have run before, run it now. */ | |
b96fd3e8 GM |
5874 | if (redisplaying_p && !safe) |
5875 | return; | |
177c0ea7 | 5876 | |
4588ec20 JB |
5877 | while (delayed_size_change) |
5878 | { | |
35f56f96 | 5879 | Lisp_Object tail, frame; |
4588ec20 JB |
5880 | |
5881 | delayed_size_change = 0; | |
5882 | ||
35f56f96 | 5883 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5884 | { |
5f5c8ee5 | 5885 | struct frame *f = XFRAME (frame); |
35f56f96 | 5886 | |
7df02016 KS |
5887 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
5888 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
5889 | 0, 0, safe); | |
4588ec20 JB |
5890 | } |
5891 | } | |
5892 | } | |
5893 | ||
5894 | ||
502b9b64 | 5895 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 5896 | indicate no change is to take place. |
4588ec20 | 5897 | |
b6a65ac2 JB |
5898 | If DELAY is non-zero, then assume we're being called from a signal |
5899 | handler, and queue the change for later - perhaps the next | |
5900 | redisplay. Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
5901 | from a signal handler. |
5902 | ||
5903 | SAFE non-zero means this function is called from a place where it's | |
5904 | safe to change frame sizes while a redisplay is in progress. */ | |
b6a65ac2 | 5905 | |
dfcf069d | 5906 | void |
b96fd3e8 | 5907 | change_frame_size (f, newheight, newwidth, pretend, delay, safe) |
5f5c8ee5 | 5908 | register struct frame *f; |
b96fd3e8 | 5909 | int newheight, newwidth, pretend, delay, safe; |
45140e01 RS |
5910 | { |
5911 | Lisp_Object tail, frame; | |
3826ea1a | 5912 | |
8a376b3b | 5913 | if (! FRAME_WINDOW_P (f)) |
45140e01 | 5914 | { |
93e54836 RS |
5915 | /* When using termcap, or on MS-DOS, all frames use |
5916 | the same screen, so a change in size affects all frames. */ | |
45140e01 | 5917 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 5918 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 5919 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 5920 | pretend, delay, safe); |
45140e01 RS |
5921 | } |
5922 | else | |
b96fd3e8 | 5923 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
5924 | } |
5925 | ||
5926 | static void | |
b96fd3e8 | 5927 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe) |
5f5c8ee5 | 5928 | register struct frame *f; |
b96fd3e8 | 5929 | int newheight, newwidth, pretend, delay, safe; |
4588ec20 | 5930 | { |
7df02016 | 5931 | int new_frame_total_cols; |
aed13378 | 5932 | int count = SPECPDL_INDEX (); |
3826ea1a | 5933 | |
4588ec20 | 5934 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 5935 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 5936 | { |
7df02016 KS |
5937 | f->new_text_lines = newheight; |
5938 | f->new_text_cols = newwidth; | |
4588ec20 JB |
5939 | delayed_size_change = 1; |
5940 | return; | |
5941 | } | |
5942 | ||
502b9b64 | 5943 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
5944 | f->new_text_lines = 0; |
5945 | f->new_text_cols = 0; | |
b6a65ac2 | 5946 | |
08f7aa3e | 5947 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 5948 | if (newheight == 0) |
7df02016 | 5949 | newheight = FRAME_LINES (f); |
ae19c6f2 | 5950 | if (newwidth == 0) |
7df02016 | 5951 | newwidth = FRAME_COLS (f); |
3826ea1a | 5952 | |
5f5c8ee5 GM |
5953 | /* Compute width of windows in F. |
5954 | This is the width of the frame without vertical scroll bars. */ | |
7df02016 | 5955 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); |
3826ea1a | 5956 | |
b6a65ac2 | 5957 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 5958 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 JB |
5959 | |
5960 | /* If we're not changing the frame size, quit now. */ | |
7df02016 KS |
5961 | if (newheight == FRAME_LINES (f) |
5962 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) | |
4588ec20 JB |
5963 | return; |
5964 | ||
cbb95688 RS |
5965 | BLOCK_INPUT; |
5966 | ||
886a8a6c KH |
5967 | #ifdef MSDOS |
5968 | /* We only can set screen dimensions to certain values supported | |
5969 | by our video hardware. Try to find the smallest size greater | |
5970 | or equal to the requested dimensions. */ | |
5971 | dos_set_window_size (&newheight, &newwidth); | |
5972 | #endif | |
5973 | ||
7df02016 | 5974 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 5975 | { |
5f5c8ee5 | 5976 | if (FRAME_HAS_MINIBUF_P (f) && !FRAME_MINIBUF_ONLY_P (f)) |
4588ec20 | 5977 | { |
5f5c8ee5 | 5978 | /* Frame has both root and mini-buffer. */ |
7df02016 | 5979 | XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f))->top_line, |
5f5c8ee5 GM |
5980 | FRAME_TOP_MARGIN (f)); |
5981 | set_window_height (FRAME_ROOT_WINDOW (f), | |
5982 | (newheight | |
5983 | - 1 | |
5984 | - FRAME_TOP_MARGIN (f)), | |
5985 | 0); | |
7df02016 | 5986 | XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top_line, |
a5d8b611 | 5987 | newheight - 1); |
5f5c8ee5 | 5988 | set_window_height (FRAME_MINIBUF_WINDOW (f), 1, 0); |
4588ec20 JB |
5989 | } |
5990 | else | |
502b9b64 | 5991 | /* Frame has just one top-level window. */ |
5f5c8ee5 GM |
5992 | set_window_height (FRAME_ROOT_WINDOW (f), |
5993 | newheight - FRAME_TOP_MARGIN (f), 0); | |
b6a65ac2 | 5994 | |
5f5c8ee5 | 5995 | if (FRAME_TERMCAP_P (f) && !pretend) |
b6a65ac2 | 5996 | FrameRows = newheight; |
4588ec20 JB |
5997 | } |
5998 | ||
7df02016 | 5999 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 6000 | { |
7df02016 | 6001 | set_window_width (FRAME_ROOT_WINDOW (f), new_frame_total_cols, 0); |
5f5c8ee5 | 6002 | if (FRAME_HAS_MINIBUF_P (f)) |
7df02016 | 6003 | set_window_width (FRAME_MINIBUF_WINDOW (f), new_frame_total_cols, 0); |
4588ec20 | 6004 | |
5f5c8ee5 | 6005 | if (FRAME_TERMCAP_P (f) && !pretend) |
502b9b64 | 6006 | FrameCols = newwidth; |
5f5c8ee5 | 6007 | |
9ea173e8 | 6008 | if (WINDOWP (f->tool_bar_window)) |
7df02016 | 6009 | XSETFASTINT (XWINDOW (f->tool_bar_window)->total_cols, newwidth); |
4588ec20 JB |
6010 | } |
6011 | ||
7df02016 KS |
6012 | FRAME_LINES (f) = newheight; |
6013 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 6014 | |
5f5c8ee5 GM |
6015 | { |
6016 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
6017 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 6018 | |
5f5c8ee5 GM |
6019 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
6020 | &text_area_height); | |
6021 | if (w->cursor.x >= text_area_x + text_area_width) | |
6022 | w->cursor.hpos = w->cursor.x = 0; | |
6023 | if (w->cursor.y >= text_area_y + text_area_height) | |
6024 | w->cursor.vpos = w->cursor.y = 0; | |
6025 | } | |
986e61b8 | 6026 | |
5f5c8ee5 | 6027 | adjust_glyphs (f); |
5f5c8ee5 | 6028 | calculate_costs (f); |
cb02fa39 GM |
6029 | SET_FRAME_GARBAGED (f); |
6030 | f->resized_p = 1; | |
97cf50e7 RS |
6031 | |
6032 | UNBLOCK_INPUT; | |
61730a69 | 6033 | |
e523f7e5 RS |
6034 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); |
6035 | ||
61730a69 | 6036 | /* This isn't quite a no-op: it runs window-configuration-change-hook. */ |
5f5c8ee5 | 6037 | Fset_window_buffer (FRAME_SELECTED_WINDOW (f), |
7df02016 | 6038 | XWINDOW (FRAME_SELECTED_WINDOW (f))->buffer, Qt); |
e523f7e5 RS |
6039 | |
6040 | unbind_to (count, Qnil); | |
4588ec20 | 6041 | } |
5f5c8ee5 GM |
6042 | |
6043 | ||
4588ec20 | 6044 | \f |
5f5c8ee5 GM |
6045 | /*********************************************************************** |
6046 | Terminal Related Lisp Functions | |
6047 | ***********************************************************************/ | |
6048 | ||
6049 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 6050 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
6051 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
6052 | FILE = nil means just close any termscript file currently open. */) | |
6053 | (file) | |
5f5c8ee5 GM |
6054 | Lisp_Object file; |
6055 | { | |
6056 | if (termscript != 0) fclose (termscript); | |
6057 | termscript = 0; | |
6058 | ||
6059 | if (! NILP (file)) | |
6060 | { | |
6061 | file = Fexpand_file_name (file, Qnil); | |
d5db4077 | 6062 | termscript = fopen (SDATA (file), "w"); |
5f5c8ee5 GM |
6063 | if (termscript == 0) |
6064 | report_file_error ("Opening termscript", Fcons (file, Qnil)); | |
6065 | } | |
6066 | return Qnil; | |
6067 | } | |
6068 | ||
6069 | ||
4588ec20 | 6070 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
228299fa | 6071 | Ssend_string_to_terminal, 1, 1, 0, |
7ee72033 MB |
6072 | doc: /* Send STRING to the terminal without alteration. |
6073 | Control characters in STRING will have terminal-dependent effects. */) | |
6074 | (string) | |
e912ba09 | 6075 | Lisp_Object string; |
4588ec20 | 6076 | { |
94f3db62 | 6077 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 6078 | CHECK_STRING (string); |
d5db4077 | 6079 | fwrite (SDATA (string), 1, SBYTES (string), stdout); |
4588ec20 JB |
6080 | fflush (stdout); |
6081 | if (termscript) | |
6082 | { | |
d5db4077 | 6083 | fwrite (SDATA (string), 1, SBYTES (string), |
fc932ac6 | 6084 | termscript); |
4588ec20 JB |
6085 | fflush (termscript); |
6086 | } | |
6087 | return Qnil; | |
6088 | } | |
6089 | ||
5f5c8ee5 | 6090 | |
4588ec20 | 6091 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 6092 | doc: /* Beep, or flash the screen. |
228299fa | 6093 | Also, unless an argument is given, |
7ee72033 MB |
6094 | terminate any keyboard macro currently executing. */) |
6095 | (arg) | |
4588ec20 JB |
6096 | Lisp_Object arg; |
6097 | { | |
efb859b4 | 6098 | if (!NILP (arg)) |
4588ec20 | 6099 | { |
7fa788da RS |
6100 | if (noninteractive) |
6101 | putchar (07); | |
6102 | else | |
6103 | ring_bell (); | |
4588ec20 JB |
6104 | fflush (stdout); |
6105 | } | |
6106 | else | |
6107 | bitch_at_user (); | |
6108 | ||
6109 | return Qnil; | |
6110 | } | |
6111 | ||
dfcf069d | 6112 | void |
4588ec20 JB |
6113 | bitch_at_user () |
6114 | { | |
6115 | if (noninteractive) | |
6116 | putchar (07); | |
5f5c8ee5 | 6117 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
4588ec20 JB |
6118 | error ("Keyboard macro terminated by a command ringing the bell"); |
6119 | else | |
6120 | ring_bell (); | |
6121 | fflush (stdout); | |
6122 | } | |
6123 | ||
5f5c8ee5 GM |
6124 | |
6125 | \f | |
6126 | /*********************************************************************** | |
6127 | Sleeping, Waiting | |
6128 | ***********************************************************************/ | |
6129 | ||
4588ec20 | 6130 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 6131 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
6132 | SECONDS may be a floating-point value, meaning that you can wait for a |
6133 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
6134 | additional wait period, in milliseconds; this may be useful if your | |
6135 | Emacs was built without floating point support. | |
7ee72033 MB |
6136 | \(Not all operating systems support waiting for a fraction of a second.) */) |
6137 | (seconds, milliseconds) | |
767229f8 | 6138 | Lisp_Object seconds, milliseconds; |
4588ec20 | 6139 | { |
767229f8 | 6140 | int sec, usec; |
4588ec20 | 6141 | |
767229f8 | 6142 | if (NILP (milliseconds)) |
e9c9a718 | 6143 | XSETINT (milliseconds, 0); |
767229f8 | 6144 | else |
b7826503 | 6145 | CHECK_NUMBER (milliseconds); |
b07646f5 JB |
6146 | usec = XINT (milliseconds) * 1000; |
6147 | ||
b07646f5 JB |
6148 | { |
6149 | double duration = extract_float (seconds); | |
6150 | sec = (int) duration; | |
6151 | usec += (duration - sec) * 1000000; | |
6152 | } | |
4588ec20 | 6153 | |
a41f8bed | 6154 | #ifndef EMACS_HAS_USECS |
767229f8 JB |
6155 | if (sec == 0 && usec != 0) |
6156 | error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); | |
4588ec20 | 6157 | #endif |
767229f8 JB |
6158 | |
6159 | /* Assure that 0 <= usec < 1000000. */ | |
6160 | if (usec < 0) | |
6161 | { | |
153a073c | 6162 | /* We can't rely on the rounding being correct if usec is negative. */ |
767229f8 JB |
6163 | if (-1000000 < usec) |
6164 | sec--, usec += 1000000; | |
6165 | else | |
6166 | sec -= -usec / 1000000, usec = 1000000 - (-usec % 1000000); | |
4588ec20 | 6167 | } |
767229f8 JB |
6168 | else |
6169 | sec += usec / 1000000, usec %= 1000000; | |
6170 | ||
6b5153b1 | 6171 | if (sec < 0 || (sec == 0 && usec == 0)) |
767229f8 | 6172 | return Qnil; |
4588ec20 | 6173 | |
f76475ad JB |
6174 | { |
6175 | Lisp_Object zero; | |
6176 | ||
a5d8b611 | 6177 | XSETFASTINT (zero, 0); |
f76475ad JB |
6178 | wait_reading_process_input (sec, usec, zero, 0); |
6179 | } | |
d1af74e9 | 6180 | |
767229f8 JB |
6181 | /* We should always have wait_reading_process_input; we have a dummy |
6182 | implementation for systems which don't support subprocesses. */ | |
6183 | #if 0 | |
6184 | /* No wait_reading_process_input */ | |
4588ec20 JB |
6185 | immediate_quit = 1; |
6186 | QUIT; | |
6187 | ||
6188 | #ifdef VMS | |
6189 | sys_sleep (sec); | |
6190 | #else /* not VMS */ | |
177c0ea7 | 6191 | /* The reason this is done this way |
4588ec20 | 6192 | (rather than defined (H_S) && defined (H_T)) |
153a073c | 6193 | is because the VMS preprocessor doesn't grok `defined'. */ |
4588ec20 | 6194 | #ifdef HAVE_SELECT |
a41f8bed JB |
6195 | EMACS_GET_TIME (end_time); |
6196 | EMACS_SET_SECS_USECS (timeout, sec, usec); | |
d1af74e9 | 6197 | EMACS_ADD_TIME (end_time, end_time, timeout); |
177c0ea7 | 6198 | |
4588ec20 JB |
6199 | while (1) |
6200 | { | |
a41f8bed JB |
6201 | EMACS_GET_TIME (timeout); |
6202 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
6203 | if (EMACS_TIME_NEG_P (timeout) | |
6204 | || !select (1, 0, 0, 0, &timeout)) | |
4588ec20 JB |
6205 | break; |
6206 | } | |
4588ec20 JB |
6207 | #else /* not HAVE_SELECT */ |
6208 | sleep (sec); | |
6209 | #endif /* HAVE_SELECT */ | |
6210 | #endif /* not VMS */ | |
177c0ea7 | 6211 | |
4588ec20 JB |
6212 | immediate_quit = 0; |
6213 | #endif /* no subprocesses */ | |
6214 | ||
6215 | return Qnil; | |
6216 | } | |
6217 | ||
5f5c8ee5 | 6218 | |
f76475ad JB |
6219 | /* This is just like wait_reading_process_input, except that |
6220 | it does the redisplay. | |
6221 | ||
ea0d86af | 6222 | It's also much like Fsit_for, except that it can be used for |
836d2cde | 6223 | waiting for input as well. */ |
4588ec20 | 6224 | |
f76475ad | 6225 | Lisp_Object |
ae5a0dd4 RS |
6226 | sit_for (sec, usec, reading, display, initial_display) |
6227 | int sec, usec, reading, display, initial_display; | |
f76475ad JB |
6228 | { |
6229 | Lisp_Object read_kbd; | |
4588ec20 | 6230 | |
ccddf474 RS |
6231 | swallow_events (display); |
6232 | ||
5c749f60 | 6233 | if (detect_input_pending_run_timers (display) || !NILP (Vexecuting_macro)) |
4588ec20 | 6234 | return Qnil; |
4588ec20 | 6235 | |
ae5a0dd4 | 6236 | if (initial_display) |
3007ebfb | 6237 | redisplay_preserve_echo_area (2); |
4588ec20 | 6238 | |
dfdb645c JB |
6239 | if (sec == 0 && usec == 0) |
6240 | return Qt; | |
6241 | ||
4588ec20 | 6242 | #ifdef SIGIO |
8fc798e9 | 6243 | gobble_input (0); |
f76475ad JB |
6244 | #endif |
6245 | ||
e9c9a718 | 6246 | XSETINT (read_kbd, reading ? -1 : 1); |
f76475ad JB |
6247 | wait_reading_process_input (sec, usec, read_kbd, display); |
6248 | ||
4588ec20 JB |
6249 | return detect_input_pending () ? Qnil : Qt; |
6250 | } | |
6251 | ||
5f5c8ee5 | 6252 | |
f76475ad | 6253 | DEFUN ("sit-for", Fsit_for, Ssit_for, 1, 3, 0, |
bacf09b4 | 6254 | doc: /* Perform redisplay, then wait for SECONDS seconds or until input is available. |
228299fa | 6255 | SECONDS may be a floating-point value, meaning that you can wait for a |
659d9874 | 6256 | fraction of a second. |
228299fa | 6257 | \(Not all operating systems support waiting for a fraction of a second.) |
659d9874 | 6258 | Optional arg NODISP non-nil means don't redisplay, just wait for input. |
228299fa GM |
6259 | Redisplay is preempted as always if input arrives, and does not happen |
6260 | if input is available before it starts. | |
659d9874 SM |
6261 | Value is t if waited the full time with no input arriving. |
6262 | ||
6263 | An obsolete but still supported form is | |
6264 | \(sit-for SECONDS &optional MILLISECONDS NODISP) | |
6265 | Where the optional arg MILLISECONDS specifies an additional wait period, | |
6266 | in milliseconds; this was useful when Emacs was built without | |
6267 | floating point support. | |
5435c793 SM |
6268 | usage: (sit-for SECONDS &optional NODISP OLD-NODISP) */) |
6269 | ||
6270 | /* The `old-nodisp' stuff is there so that the arglist has the correct | |
6271 | length. Otherwise, `defdvice' will redefine it with fewer args. */ | |
7ee72033 | 6272 | (seconds, milliseconds, nodisp) |
767229f8 | 6273 | Lisp_Object seconds, milliseconds, nodisp; |
f76475ad | 6274 | { |
767229f8 | 6275 | int sec, usec; |
f76475ad | 6276 | |
659d9874 SM |
6277 | if (NILP (nodisp) && !NUMBERP (milliseconds)) |
6278 | { /* New style. */ | |
6279 | nodisp = milliseconds; | |
6280 | milliseconds = Qnil; | |
6281 | } | |
6282 | ||
767229f8 | 6283 | if (NILP (milliseconds)) |
e9c9a718 | 6284 | XSETINT (milliseconds, 0); |
767229f8 | 6285 | else |
b7826503 | 6286 | CHECK_NUMBER (milliseconds); |
b07646f5 JB |
6287 | usec = XINT (milliseconds) * 1000; |
6288 | ||
b07646f5 JB |
6289 | { |
6290 | double duration = extract_float (seconds); | |
6291 | sec = (int) duration; | |
6292 | usec += (duration - sec) * 1000000; | |
6293 | } | |
f76475ad | 6294 | |
f76475ad | 6295 | #ifndef EMACS_HAS_USECS |
767229f8 JB |
6296 | if (usec != 0 && sec == 0) |
6297 | error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE); | |
f76475ad | 6298 | #endif |
f76475ad | 6299 | |
ae5a0dd4 | 6300 | return sit_for (sec, usec, 0, NILP (nodisp), NILP (nodisp)); |
f76475ad | 6301 | } |
5f5c8ee5 GM |
6302 | |
6303 | ||
6304 | \f | |
6305 | /*********************************************************************** | |
6306 | Other Lisp Functions | |
6307 | ***********************************************************************/ | |
6308 | ||
6309 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
6310 | session's frames, frame names, buffers, buffer-read-only flags, and | |
6311 | buffer-modified-flags, and a trailing sentinel (so we don't need to | |
6312 | add length checks). */ | |
6313 | ||
6314 | static Lisp_Object frame_and_buffer_state; | |
6315 | ||
6316 | ||
6317 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
228299fa | 6318 | Sframe_or_buffer_changed_p, 0, 0, 0, |
bacf09b4 | 6319 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
228299fa GM |
6320 | The state variable is an internal vector containing all frames and buffers, |
6321 | aside from buffers whose names start with space, | |
6322 | along with the buffers' read-only and modified flags, which allows a fast | |
6323 | check to see whether the menu bars might need to be recomputed. | |
6324 | If this function returns non-nil, it updates the internal vector to reflect | |
7ee72033 MB |
6325 | the current state. */) |
6326 | () | |
5f5c8ee5 GM |
6327 | { |
6328 | Lisp_Object tail, frame, buf; | |
6329 | Lisp_Object *vecp; | |
6330 | int n; | |
6331 | ||
6332 | vecp = XVECTOR (frame_and_buffer_state)->contents; | |
6333 | FOR_EACH_FRAME (tail, frame) | |
6334 | { | |
6335 | if (!EQ (*vecp++, frame)) | |
6336 | goto changed; | |
6337 | if (!EQ (*vecp++, XFRAME (frame)->name)) | |
6338 | goto changed; | |
6339 | } | |
6340 | /* Check that the buffer info matches. | |
6341 | No need to test for the end of the vector | |
6342 | because the last element of the vector is lambda | |
6343 | and that will always cause a mismatch. */ | |
7539e11f | 6344 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6345 | { |
7539e11f | 6346 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6347 | /* Ignore buffers that aren't included in buffer lists. */ |
d5db4077 | 6348 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
5f5c8ee5 GM |
6349 | continue; |
6350 | if (!EQ (*vecp++, buf)) | |
6351 | goto changed; | |
6352 | if (!EQ (*vecp++, XBUFFER (buf)->read_only)) | |
6353 | goto changed; | |
6354 | if (!EQ (*vecp++, Fbuffer_modified_p (buf))) | |
6355 | goto changed; | |
6356 | } | |
6357 | /* Detect deletion of a buffer at the end of the list. */ | |
6358 | if (EQ (*vecp, Qlambda)) | |
6359 | return Qnil; | |
6360 | changed: | |
6361 | /* Start with 1 so there is room for at least one lambda at the end. */ | |
6362 | n = 1; | |
6363 | FOR_EACH_FRAME (tail, frame) | |
6364 | n += 2; | |
7539e11f | 6365 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 GM |
6366 | n += 3; |
6367 | /* Reallocate the vector if it's grown, or if it's shrunk a lot. */ | |
6368 | if (n > XVECTOR (frame_and_buffer_state)->size | |
6369 | || n + 20 < XVECTOR (frame_and_buffer_state)->size / 2) | |
6370 | /* Add 20 extra so we grow it less often. */ | |
6371 | frame_and_buffer_state = Fmake_vector (make_number (n + 20), Qlambda); | |
6372 | vecp = XVECTOR (frame_and_buffer_state)->contents; | |
6373 | FOR_EACH_FRAME (tail, frame) | |
6374 | { | |
6375 | *vecp++ = frame; | |
6376 | *vecp++ = XFRAME (frame)->name; | |
6377 | } | |
7539e11f | 6378 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6379 | { |
7539e11f | 6380 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6381 | /* Ignore buffers that aren't included in buffer lists. */ |
d5db4077 | 6382 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
5f5c8ee5 GM |
6383 | continue; |
6384 | *vecp++ = buf; | |
6385 | *vecp++ = XBUFFER (buf)->read_only; | |
6386 | *vecp++ = Fbuffer_modified_p (buf); | |
6387 | } | |
6388 | /* Fill up the vector with lambdas (always at least one). */ | |
6389 | *vecp++ = Qlambda; | |
6390 | while (vecp - XVECTOR (frame_and_buffer_state)->contents | |
6391 | < XVECTOR (frame_and_buffer_state)->size) | |
6392 | *vecp++ = Qlambda; | |
6393 | /* Make sure we didn't overflow the vector. */ | |
6394 | if (vecp - XVECTOR (frame_and_buffer_state)->contents | |
6395 | > XVECTOR (frame_and_buffer_state)->size) | |
6396 | abort (); | |
6397 | return Qt; | |
6398 | } | |
6399 | ||
6400 | ||
4588ec20 | 6401 | \f |
5f5c8ee5 GM |
6402 | /*********************************************************************** |
6403 | Initialization | |
6404 | ***********************************************************************/ | |
6405 | ||
4588ec20 JB |
6406 | char *terminal_type; |
6407 | ||
5f5c8ee5 GM |
6408 | /* Initialization done when Emacs fork is started, before doing stty. |
6409 | Determine terminal type and set terminal_driver. Then invoke its | |
6410 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 6411 | |
dfcf069d | 6412 | void |
4588ec20 JB |
6413 | init_display () |
6414 | { | |
6415 | #ifdef HAVE_X_WINDOWS | |
6416 | extern int display_arg; | |
6417 | #endif | |
6418 | ||
5f5c8ee5 GM |
6419 | /* Construct the space glyph. */ |
6420 | space_glyph.type = CHAR_GLYPH; | |
6421 | SET_CHAR_GLYPH_FROM_GLYPH (space_glyph, ' '); | |
6422 | space_glyph.charpos = -1; | |
6423 | ||
4588ec20 JB |
6424 | meta_key = 0; |
6425 | inverse_video = 0; | |
6426 | cursor_in_echo_area = 0; | |
6427 | terminal_type = (char *) 0; | |
6428 | ||
1315c181 JB |
6429 | /* Now is the time to initialize this; it's used by init_sys_modes |
6430 | during startup. */ | |
6431 | Vwindow_system = Qnil; | |
4588ec20 | 6432 | |
1315c181 JB |
6433 | /* If the user wants to use a window system, we shouldn't bother |
6434 | initializing the terminal. This is especially important when the | |
6435 | terminal is so dumb that emacs gives up before and doesn't bother | |
6436 | using the window system. | |
4588ec20 | 6437 | |
36bbad1d KH |
6438 | If the DISPLAY environment variable is set and nonempty, |
6439 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6440 | |
6441 | #ifdef HAVE_X_WINDOWS | |
d460af17 JB |
6442 | if (! display_arg) |
6443 | { | |
36bbad1d | 6444 | char *display; |
d460af17 | 6445 | #ifdef VMS |
36bbad1d | 6446 | display = getenv ("DECW$DISPLAY"); |
d460af17 | 6447 | #else |
36bbad1d | 6448 | display = getenv ("DISPLAY"); |
d460af17 | 6449 | #endif |
36bbad1d KH |
6450 | |
6451 | display_arg = (display != 0 && *display != 0); | |
f040093a | 6452 | } |
d460af17 | 6453 | |
177c0ea7 | 6454 | if (!inhibit_window_system && display_arg |
9e4555e8 RS |
6455 | #ifndef CANNOT_DUMP |
6456 | && initialized | |
6457 | #endif | |
6458 | ) | |
4588ec20 JB |
6459 | { |
6460 | Vwindow_system = intern ("x"); | |
6461 | #ifdef HAVE_X11 | |
6462 | Vwindow_system_version = make_number (11); | |
6463 | #else | |
6464 | Vwindow_system_version = make_number (10); | |
039e5d71 | 6465 | #endif |
8a2a6032 | 6466 | #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES) |
039e5d71 | 6467 | /* In some versions of ncurses, |
6a428f77 | 6468 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6469 | So call tgetent. */ |
6470 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 | 6471 | #endif |
5f5c8ee5 | 6472 | adjust_frame_glyphs_initially (); |
4588ec20 JB |
6473 | return; |
6474 | } | |
6475 | #endif /* HAVE_X_WINDOWS */ | |
6476 | ||
fd2e066a | 6477 | #ifdef HAVE_NTGUI |
177c0ea7 | 6478 | if (!inhibit_window_system) |
fd2e066a | 6479 | { |
60c7469c | 6480 | Vwindow_system = intern ("w32"); |
fd2e066a | 6481 | Vwindow_system_version = make_number (1); |
5f5c8ee5 | 6482 | adjust_frame_glyphs_initially (); |
fd2e066a GV |
6483 | return; |
6484 | } | |
6485 | #endif /* HAVE_NTGUI */ | |
6486 | ||
e0f712ba | 6487 | #ifdef MAC_OS |
177c0ea7 | 6488 | if (!inhibit_window_system) |
1a578e9b AC |
6489 | { |
6490 | Vwindow_system = intern ("mac"); | |
6491 | Vwindow_system_version = make_number (1); | |
6492 | adjust_frame_glyphs_initially (); | |
6493 | return; | |
6494 | } | |
e0f712ba | 6495 | #endif /* MAC_OS */ |
1a578e9b | 6496 | |
4588ec20 JB |
6497 | /* If no window system has been specified, try to use the terminal. */ |
6498 | if (! isatty (0)) | |
6499 | { | |
1559a86d | 6500 | fatal ("standard input is not a tty"); |
4588ec20 JB |
6501 | exit (1); |
6502 | } | |
6503 | ||
153a073c | 6504 | /* Look at the TERM variable. */ |
4588ec20 JB |
6505 | terminal_type = (char *) getenv ("TERM"); |
6506 | if (!terminal_type) | |
6507 | { | |
6508 | #ifdef VMS | |
6509 | fprintf (stderr, "Please specify your terminal type.\n\ | |
6510 | For types defined in VMS, use set term /device=TYPE.\n\ | |
6511 | For types not defined in VMS, use define emacs_term \"TYPE\".\n\ | |
6512 | \(The quotation marks are necessary since terminal types are lower case.)\n"); | |
6513 | #else | |
6514 | fprintf (stderr, "Please set the environment variable TERM; see tset(1).\n"); | |
6515 | #endif | |
6516 | exit (1); | |
6517 | } | |
6518 | ||
6519 | #ifdef VMS | |
5f5c8ee5 | 6520 | /* VMS DCL tends to up-case things, so down-case term type. |
4588ec20 JB |
6521 | Hardly any uppercase letters in terminal types; should be none. */ |
6522 | { | |
6523 | char *new = (char *) xmalloc (strlen (terminal_type) + 1); | |
6524 | char *p; | |
6525 | ||
6526 | strcpy (new, terminal_type); | |
6527 | ||
6528 | for (p = new; *p; p++) | |
6529 | if (isupper (*p)) | |
6530 | *p = tolower (*p); | |
6531 | ||
6532 | terminal_type = new; | |
177c0ea7 | 6533 | } |
5f5c8ee5 | 6534 | #endif /* VMS */ |
4588ec20 JB |
6535 | |
6536 | term_init (terminal_type); | |
177c0ea7 | 6537 | |
d86c299a | 6538 | { |
91fb7e1b | 6539 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6540 | int width = FRAME_TOTAL_COLS (sf); |
6541 | int height = FRAME_LINES (sf); | |
d86c299a | 6542 | |
5f5c8ee5 | 6543 | unsigned int total_glyphs = height * (width + 2) * sizeof (struct glyph); |
d86c299a | 6544 | |
5f5c8ee5 GM |
6545 | /* If these sizes are so big they cause overflow, just ignore the |
6546 | change. It's not clear what better we could do. */ | |
6547 | if (total_glyphs / sizeof (struct glyph) / height != width + 2) | |
1559a86d | 6548 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6549 | } |
6550 | ||
5f5c8ee5 | 6551 | adjust_frame_glyphs_initially (); |
91fb7e1b | 6552 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6553 | |
4588ec20 JB |
6554 | #ifdef SIGWINCH |
6555 | #ifndef CANNOT_DUMP | |
6556 | if (initialized) | |
6557 | #endif /* CANNOT_DUMP */ | |
6558 | signal (SIGWINCH, window_change_signal); | |
6559 | #endif /* SIGWINCH */ | |
5f5c8ee5 GM |
6560 | |
6561 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ | |
6562 | if (initialized | |
6563 | && !noninteractive | |
622dca89 EZ |
6564 | #ifdef MSDOS |
6565 | /* The MSDOS terminal turns on its ``window system'' relatively | |
6566 | late into the startup, so we cannot do the frame faces' | |
6567 | initialization just yet. It will be done later by pc-win.el | |
6568 | and internal_terminal_init. */ | |
6569 | && (strcmp (terminal_type, "internal") != 0 || inhibit_window_system) | |
6570 | #endif | |
5f5c8ee5 | 6571 | && NILP (Vwindow_system)) |
2d764c78 EZ |
6572 | { |
6573 | /* For the initial frame, we don't have any way of knowing what | |
6574 | are the foreground and background colors of the terminal. */ | |
6575 | struct frame *sf = SELECTED_FRAME(); | |
6576 | ||
f9d2fdc4 EZ |
6577 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
6578 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
6579 | call0 (intern ("tty-set-up-initial-frame-faces")); |
6580 | } | |
5f5c8ee5 GM |
6581 | } |
6582 | ||
6583 | ||
6584 | \f | |
6585 | /*********************************************************************** | |
6586 | Blinking cursor | |
6587 | ***********************************************************************/ | |
6588 | ||
c3f13540 | 6589 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 6590 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 6591 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
6592 | WINDOW nil means use the selected window. SHOW non-nil means |
6593 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 MB |
6594 | don't show a cursor. */) |
6595 | (window, show) | |
5d7791b3 | 6596 | Lisp_Object window, show; |
5f5c8ee5 | 6597 | { |
5f5c8ee5 GM |
6598 | /* Don't change cursor state while redisplaying. This could confuse |
6599 | output routines. */ | |
6600 | if (!redisplaying_p) | |
6601 | { | |
6602 | if (NILP (window)) | |
6603 | window = selected_window; | |
6604 | else | |
b7826503 | 6605 | CHECK_WINDOW (window); |
177c0ea7 | 6606 | |
5d7791b3 | 6607 | XWINDOW (window)->cursor_off_p = NILP (show); |
5f5c8ee5 GM |
6608 | } |
6609 | ||
6610 | return Qnil; | |
4588ec20 | 6611 | } |
5f5c8ee5 GM |
6612 | |
6613 | ||
5d7791b3 GM |
6614 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
6615 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 6616 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 MB |
6617 | WINDOW nil or omitted means report on the selected window. */) |
6618 | (window) | |
5d7791b3 GM |
6619 | Lisp_Object window; |
6620 | { | |
6621 | struct window *w; | |
177c0ea7 | 6622 | |
5d7791b3 GM |
6623 | if (NILP (window)) |
6624 | window = selected_window; | |
6625 | else | |
b7826503 | 6626 | CHECK_WINDOW (window); |
177c0ea7 | 6627 | |
5d7791b3 | 6628 | w = XWINDOW (window); |
177c0ea7 | 6629 | return w->cursor_off_p ? Qnil : Qt; |
5d7791b3 GM |
6630 | } |
6631 | ||
4588ec20 | 6632 | \f |
5f5c8ee5 GM |
6633 | /*********************************************************************** |
6634 | Initialization | |
6635 | ***********************************************************************/ | |
6636 | ||
dfcf069d | 6637 | void |
4588ec20 JB |
6638 | syms_of_display () |
6639 | { | |
502b9b64 | 6640 | defsubr (&Sredraw_frame); |
4588ec20 | 6641 | defsubr (&Sredraw_display); |
078b3696 | 6642 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
6643 | defsubr (&Sopen_termscript); |
6644 | defsubr (&Sding); | |
6645 | defsubr (&Ssit_for); | |
6646 | defsubr (&Ssleep_for); | |
6647 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 6648 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 6649 | defsubr (&Sinternal_show_cursor_p); |
4588ec20 | 6650 | |
2d5912c1 | 6651 | #if GLYPH_DEBUG |
9b0e97aa GM |
6652 | defsubr (&Sdump_redisplay_history); |
6653 | #endif | |
6654 | ||
d1dad759 | 6655 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
6656 | staticpro (&frame_and_buffer_state); |
6657 | ||
9cda4f7c RS |
6658 | Qdisplay_table = intern ("display-table"); |
6659 | staticpro (&Qdisplay_table); | |
e7067d00 GM |
6660 | Qredisplay_dont_pause = intern ("redisplay-dont-pause"); |
6661 | staticpro (&Qredisplay_dont_pause); | |
9cda4f7c | 6662 | |
7ee72033 | 6663 | DEFVAR_INT ("baud-rate", &baud_rate, |
bacf09b4 | 6664 | doc: /* *The output baud rate of the terminal. |
228299fa GM |
6665 | On most systems, changing this value will affect the amount of padding |
6666 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 6667 | |
7ee72033 | 6668 | DEFVAR_BOOL ("inverse-video", &inverse_video, |
bacf09b4 | 6669 | doc: /* *Non-nil means invert the entire frame display. |
228299fa | 6670 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 6671 | |
7ee72033 | 6672 | DEFVAR_BOOL ("visible-bell", &visible_bell, |
bacf09b4 | 6673 | doc: /* *Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
6674 | |
6675 | See also `ring-bell-function'. */); | |
177c0ea7 | 6676 | |
7ee72033 | 6677 | DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter, |
bacf09b4 | 6678 | doc: /* *Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
6679 | A non-nil value is useful if the terminal can automatically preserve |
6680 | Emacs's frame display when you reenter Emacs. | |
6681 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 6682 | |
7ee72033 | 6683 | DEFVAR_LISP ("window-system", &Vwindow_system, |
85565e9e RS |
6684 | doc: /* Name of window system that Emacs is displaying through. |
6685 | The value is a symbol--for instance, `x' for X windows. | |
6686 | The value is nil if Emacs is using a text-only terminal. */); | |
177c0ea7 | 6687 | |
7ee72033 | 6688 | DEFVAR_LISP ("window-system-version", &Vwindow_system_version, |
bacf09b4 | 6689 | doc: /* The version number of the window system in use. |
228299fa | 6690 | For X windows, this is 10 or 11. */); |
177c0ea7 | 6691 | |
7ee72033 | 6692 | DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area, |
bacf09b4 | 6693 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 6694 | |
7ee72033 | 6695 | DEFVAR_LISP ("glyph-table", &Vglyph_table, |
bacf09b4 | 6696 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
6697 | If not nil, this is a vector indexed by glyph code to define the glyph. |
6698 | Each element can be: | |
6699 | integer: a glyph code which this glyph is an alias for. | |
6700 | string: output this glyph using that string (not impl. in X windows). | |
6701 | nil: this glyph mod 524288 is the code of a character to output, | |
6702 | and this glyph / 524288 is the face number (see `face-id') to use | |
6703 | while outputting it. */); | |
4588ec20 JB |
6704 | Vglyph_table = Qnil; |
6705 | ||
7ee72033 | 6706 | DEFVAR_LISP ("standard-display-table", &Vstandard_display_table, |
bacf09b4 | 6707 | doc: /* Display table to use for buffers that specify none. |
228299fa | 6708 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
6709 | Vstandard_display_table = Qnil; |
6710 | ||
7ee72033 | 6711 | DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause, |
bacf09b4 | 6712 | doc: /* *Non-nil means update isn't paused when input is detected. */); |
5f5c8ee5 GM |
6713 | redisplay_dont_pause = 0; |
6714 | ||
4588ec20 JB |
6715 | /* Initialize `window-system', unless init_display already decided it. */ |
6716 | #ifdef CANNOT_DUMP | |
6717 | if (noninteractive) | |
6718 | #endif | |
6719 | { | |
6720 | Vwindow_system = Qnil; | |
6721 | Vwindow_system_version = Qnil; | |
6722 | } | |
6723 | } |