Commit | Line | Data |
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4588ec20 | 1 | /* Updating of data structures for redisplay. |
0b5538bd TTN |
2 | Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, |
3 | 1997, 1998, 1999, 2000, 2001, 2002, 2003, | |
8cabe764 | 4 | 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. |
4588ec20 JB |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
8 | GNU Emacs is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
684d6f5b | 10 | the Free Software Foundation; either version 3, or (at your option) |
4588ec20 JB |
11 | any later version. |
12 | ||
13 | GNU Emacs is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GNU Emacs; see the file COPYING. If not, write to | |
4fc5845f LK |
20 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
21 | Boston, MA 02110-1301, USA. */ | |
4588ec20 | 22 | |
18160b98 | 23 | #include <config.h> |
68c45bf0 | 24 | #include <signal.h> |
565620a5 | 25 | #include <stdio.h> |
4588ec20 JB |
26 | #include <ctype.h> |
27 | ||
dfcf069d AS |
28 | #ifdef HAVE_UNISTD_H |
29 | #include <unistd.h> | |
30 | #endif | |
31 | ||
47099d6f | 32 | #include "lisp.h" |
4588ec20 JB |
33 | #include "termchar.h" |
34 | #include "termopts.h" | |
3be08bea | 35 | #include "termhooks.h" |
a0879520 | 36 | /* cm.h must come after dispextern.h on Windows. */ |
fd2e066a GV |
37 | #include "dispextern.h" |
38 | #include "cm.h" | |
4588ec20 | 39 | #include "buffer.h" |
24e86043 | 40 | #include "charset.h" |
d43721a2 | 41 | #include "keyboard.h" |
502b9b64 | 42 | #include "frame.h" |
4588ec20 JB |
43 | #include "window.h" |
44 | #include "commands.h" | |
45 | #include "disptab.h" | |
46 | #include "indent.h" | |
d169fe39 | 47 | #include "intervals.h" |
97cf50e7 | 48 | #include "blockinput.h" |
dfcf069d | 49 | #include "process.h" |
4588ec20 | 50 | |
24e86043 KH |
51 | /* I don't know why DEC Alpha OSF1 fail to compile this file if we |
52 | include the following file. */ | |
53 | /* #include "systty.h" */ | |
58b2bb63 | 54 | #include "syssignal.h" |
a41f8bed | 55 | |
4588ec20 JB |
56 | #ifdef HAVE_X_WINDOWS |
57 | #include "xterm.h" | |
5f5c8ee5 | 58 | #endif /* HAVE_X_WINDOWS */ |
4588ec20 | 59 | |
fd2e066a GV |
60 | #ifdef HAVE_NTGUI |
61 | #include "w32term.h" | |
62 | #endif /* HAVE_NTGUI */ | |
63 | ||
e0f712ba | 64 | #ifdef MAC_OS |
1a578e9b | 65 | #include "macterm.h" |
e0f712ba | 66 | #endif /* MAC_OS */ |
1a578e9b | 67 | |
5f5c8ee5 | 68 | /* Include systime.h after xterm.h to avoid double inclusion of time.h. */ |
6cbd1643 | 69 | |
5f5c8ee5 | 70 | #include "systime.h" |
3883a901 RS |
71 | #include <errno.h> |
72 | ||
5f5c8ee5 GM |
73 | /* To get the prototype for `sleep'. */ |
74 | ||
75 | #ifdef HAVE_UNISTD_H | |
76 | #include <unistd.h> | |
77 | #endif | |
78 | ||
4588ec20 | 79 | /* Get number of chars of output now in the buffer of a stdio stream. |
5f5c8ee5 GM |
80 | This ought to be built in in stdio, but it isn't. Some s- files |
81 | override this because their stdio internals differ. */ | |
82 | ||
e3271ae5 | 83 | #ifdef __GNU_LIBRARY__ |
5f5c8ee5 GM |
84 | |
85 | /* The s- file might have overridden the definition with one that | |
86 | works for the system's C library. But we are using the GNU C | |
87 | library, so this is the right definition for every system. */ | |
88 | ||
3883a901 RS |
89 | #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT |
90 | #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT | |
91 | #else | |
cb5558ff | 92 | #undef PENDING_OUTPUT_COUNT |
e3271ae5 | 93 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer) |
3883a901 RS |
94 | #endif |
95 | #else /* not __GNU_LIBRARY__ */ | |
68c45bf0 PE |
96 | #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING |
97 | #include <stdio_ext.h> | |
98 | #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE) | |
99 | #endif | |
cb5558ff | 100 | #ifndef PENDING_OUTPUT_COUNT |
4588ec20 JB |
101 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) |
102 | #endif | |
5f5c8ee5 GM |
103 | #endif /* not __GNU_LIBRARY__ */ |
104 | ||
8a2a6032 | 105 | #if defined(HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES) |
fa0ec9f4 DL |
106 | #include <term.h> /* for tgetent */ |
107 | #endif | |
5f5c8ee5 GM |
108 | \f |
109 | /* Structure to pass dimensions around. Used for character bounding | |
110 | boxes, glyph matrix dimensions and alike. */ | |
111 | ||
112 | struct dim | |
113 | { | |
114 | int width; | |
115 | int height; | |
116 | }; | |
117 | ||
118 | \f | |
119 | /* Function prototypes. */ | |
120 | ||
bccee4f2 GM |
121 | static struct glyph_matrix *save_current_matrix P_ ((struct frame *)); |
122 | static void restore_current_matrix P_ ((struct frame *, struct glyph_matrix *)); | |
075757cc | 123 | static int showing_window_margins_p P_ ((struct window *)); |
c9f00270 | 124 | static void fake_current_matrices P_ ((Lisp_Object)); |
408f5064 GM |
125 | static void redraw_overlapping_rows P_ ((struct window *, int)); |
126 | static void redraw_overlapped_rows P_ ((struct window *, int)); | |
5f5c8ee5 GM |
127 | static int count_blanks P_ ((struct glyph *, int)); |
128 | static int count_match P_ ((struct glyph *, struct glyph *, | |
129 | struct glyph *, struct glyph *)); | |
130 | static unsigned line_draw_cost P_ ((struct glyph_matrix *, int)); | |
131 | static void update_frame_line P_ ((struct frame *, int)); | |
132 | static struct dim allocate_matrices_for_frame_redisplay | |
5d3cc43c GM |
133 | P_ ((Lisp_Object, int, int, int, int *)); |
134 | static void allocate_matrices_for_window_redisplay P_ ((struct window *)); | |
5f5c8ee5 GM |
135 | static int realloc_glyph_pool P_ ((struct glyph_pool *, struct dim)); |
136 | static void adjust_frame_glyphs P_ ((struct frame *)); | |
137 | struct glyph_matrix *new_glyph_matrix P_ ((struct glyph_pool *)); | |
138 | static void free_glyph_matrix P_ ((struct glyph_matrix *)); | |
139 | static void adjust_glyph_matrix P_ ((struct window *, struct glyph_matrix *, | |
140 | int, int, struct dim)); | |
b96fd3e8 | 141 | static void change_frame_size_1 P_ ((struct frame *, int, int, int, int, int)); |
5f5c8ee5 | 142 | static void swap_glyph_pointers P_ ((struct glyph_row *, struct glyph_row *)); |
f1d2ce7f | 143 | #if GLYPH_DEBUG |
5f5c8ee5 | 144 | static int glyph_row_slice_p P_ ((struct glyph_row *, struct glyph_row *)); |
9339e87f | 145 | #endif |
5f5c8ee5 GM |
146 | static void fill_up_frame_row_with_spaces P_ ((struct glyph_row *, int)); |
147 | static void build_frame_matrix_from_window_tree P_ ((struct glyph_matrix *, | |
148 | struct window *)); | |
149 | static void build_frame_matrix_from_leaf_window P_ ((struct glyph_matrix *, | |
150 | struct window *)); | |
151 | static struct glyph_pool *new_glyph_pool P_ ((void)); | |
152 | static void free_glyph_pool P_ ((struct glyph_pool *)); | |
153 | static void adjust_frame_glyphs_initially P_ ((void)); | |
154 | static void adjust_frame_message_buffer P_ ((struct frame *)); | |
155 | static void adjust_decode_mode_spec_buffer P_ ((struct frame *)); | |
156 | static void fill_up_glyph_row_with_spaces P_ ((struct glyph_row *)); | |
157 | static void build_frame_matrix P_ ((struct frame *)); | |
158 | void clear_current_matrices P_ ((struct frame *)); | |
159 | void scroll_glyph_matrix_range P_ ((struct glyph_matrix *, int, int, | |
160 | int, int)); | |
161 | static void clear_window_matrices P_ ((struct window *, int)); | |
162 | static void fill_up_glyph_row_area_with_spaces P_ ((struct glyph_row *, int)); | |
163 | static int scrolling_window P_ ((struct window *, int)); | |
e876ff42 | 164 | static int update_window_line P_ ((struct window *, int, int *)); |
5f5c8ee5 | 165 | static void update_marginal_area P_ ((struct window *, int, int)); |
408f5064 | 166 | static int update_text_area P_ ((struct window *, int)); |
5f5c8ee5 GM |
167 | static void make_current P_ ((struct glyph_matrix *, struct glyph_matrix *, |
168 | int)); | |
169 | static void mirror_make_current P_ ((struct window *, int)); | |
170 | void check_window_matrix_pointers P_ ((struct window *)); | |
b96fd3e8 | 171 | #if GLYPH_DEBUG |
5f5c8ee5 GM |
172 | static void check_matrix_pointers P_ ((struct glyph_matrix *, |
173 | struct glyph_matrix *)); | |
b96fd3e8 | 174 | #endif |
5f5c8ee5 GM |
175 | static void mirror_line_dance P_ ((struct window *, int, int, int *, char *)); |
176 | static int update_window_tree P_ ((struct window *, int)); | |
177 | static int update_window P_ ((struct window *, int)); | |
178 | static int update_frame_1 P_ ((struct frame *, int, int)); | |
179 | static void set_window_cursor_after_update P_ ((struct window *)); | |
180 | static int row_equal_p P_ ((struct window *, struct glyph_row *, | |
e4e0bee9 | 181 | struct glyph_row *, int)); |
5f5c8ee5 GM |
182 | static void adjust_frame_glyphs_for_window_redisplay P_ ((struct frame *)); |
183 | static void adjust_frame_glyphs_for_frame_redisplay P_ ((struct frame *)); | |
184 | static void reverse_rows P_ ((struct glyph_matrix *, int, int)); | |
185 | static int margin_glyphs_to_reserve P_ ((struct window *, int, Lisp_Object)); | |
a13396c9 GM |
186 | static void sync_window_with_frame_matrix_rows P_ ((struct window *)); |
187 | struct window *frame_row_to_window P_ ((struct window *, int)); | |
5f5c8ee5 | 188 | |
5f5c8ee5 GM |
189 | \f |
190 | /* Non-zero means don't pause redisplay for pending input. (This is | |
191 | for debugging and for a future implementation of EDT-like | |
192 | scrolling. */ | |
4588ec20 | 193 | |
5f5c8ee5 | 194 | int redisplay_dont_pause; |
45140e01 | 195 | |
d012c62b KS |
196 | /* Define PERIODIC_PREEMPTION_CHECKING to 1, if micro-second timers |
197 | are supported, so we can check for input during redisplay at | |
198 | regular intervals. */ | |
199 | #ifdef EMACS_HAS_USECS | |
200 | #define PERIODIC_PREEMPTION_CHECKING 1 | |
201 | #else | |
202 | #define PERIODIC_PREEMPTION_CHECKING 0 | |
203 | #endif | |
204 | ||
205 | #if PERIODIC_PREEMPTION_CHECKING | |
206 | ||
207 | /* If a number (float), check for user input every N seconds. */ | |
208 | ||
209 | Lisp_Object Vredisplay_preemption_period; | |
210 | ||
211 | /* Redisplay preemption timers. */ | |
212 | ||
213 | static EMACS_TIME preemption_period; | |
214 | static EMACS_TIME preemption_next_check; | |
215 | ||
216 | #endif | |
217 | ||
a41f8bed | 218 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 219 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 220 | |
502b9b64 | 221 | int frame_garbaged; |
4588ec20 | 222 | |
5f5c8ee5 | 223 | /* Nonzero means last display completed. Zero means it was preempted. */ |
4588ec20 JB |
224 | |
225 | int display_completed; | |
226 | ||
5f5c8ee5 GM |
227 | /* Lisp variable visible-bell; enables use of screen-flash instead of |
228 | audible bell. */ | |
4588ec20 JB |
229 | |
230 | int visible_bell; | |
231 | ||
502b9b64 | 232 | /* Invert the color of the whole frame, at a low level. */ |
4588ec20 JB |
233 | |
234 | int inverse_video; | |
235 | ||
236 | /* Line speed of the terminal. */ | |
237 | ||
31ade731 | 238 | EMACS_INT baud_rate; |
4588ec20 | 239 | |
5f5c8ee5 GM |
240 | /* Either nil or a symbol naming the window system under which Emacs |
241 | is running. */ | |
4588ec20 JB |
242 | |
243 | Lisp_Object Vwindow_system; | |
244 | ||
245 | /* Version number of X windows: 10, 11 or nil. */ | |
5f5c8ee5 | 246 | |
4588ec20 JB |
247 | Lisp_Object Vwindow_system_version; |
248 | ||
5f5c8ee5 GM |
249 | /* Vector of glyph definitions. Indexed by glyph number, the contents |
250 | are a string which is how to output the glyph. | |
4588ec20 JB |
251 | |
252 | If Vglyph_table is nil, a glyph is output by using its low 8 bits | |
5f5c8ee5 GM |
253 | as a character code. |
254 | ||
255 | This is an obsolete feature that is no longer used. The variable | |
256 | is retained for compatibility. */ | |
4588ec20 JB |
257 | |
258 | Lisp_Object Vglyph_table; | |
259 | ||
260 | /* Display table to use for vectors that don't specify their own. */ | |
261 | ||
262 | Lisp_Object Vstandard_display_table; | |
263 | ||
5f5c8ee5 | 264 | /* Nonzero means reading single-character input with prompt so put |
153a073c | 265 | cursor on mini-buffer after the prompt. Positive means at end of |
5f5c8ee5 GM |
266 | text in echo area; negative means at beginning of line. */ |
267 | ||
4588ec20 | 268 | int cursor_in_echo_area; |
9cda4f7c | 269 | |
e7067d00 | 270 | Lisp_Object Qdisplay_table, Qredisplay_dont_pause; |
5f5c8ee5 | 271 | |
4588ec20 | 272 | \f |
5f5c8ee5 | 273 | /* The currently selected frame. In a single-frame version, this |
91fb7e1b | 274 | variable always equals the_only_frame. */ |
4588ec20 | 275 | |
91fb7e1b | 276 | Lisp_Object selected_frame; |
4588ec20 | 277 | |
5f5c8ee5 | 278 | /* A frame which is not just a mini-buffer, or 0 if there are no such |
502b9b64 | 279 | frames. This is usually the most recent such frame that was |
87485d6f MW |
280 | selected. In a single-frame version, this variable always holds |
281 | the address of the_only_frame. */ | |
4588ec20 | 282 | |
5f5c8ee5 | 283 | struct frame *last_nonminibuf_frame; |
d52bad65 | 284 | |
5f5c8ee5 | 285 | /* Stdio stream being used for copy of all output. */ |
4588ec20 | 286 | |
5f5c8ee5 | 287 | FILE *termscript; |
502b9b64 | 288 | |
5f5c8ee5 | 289 | /* Structure for info on cursor positioning. */ |
4588ec20 | 290 | |
5f5c8ee5 | 291 | struct cm Wcm; |
4588ec20 | 292 | |
5f5c8ee5 | 293 | /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 294 | |
5f5c8ee5 | 295 | int delayed_size_change; |
4588ec20 | 296 | |
5f5c8ee5 | 297 | /* 1 means glyph initialization has been completed at startup. */ |
4588ec20 | 298 | |
5f5c8ee5 | 299 | static int glyphs_initialized_initially_p; |
4588ec20 | 300 | |
5f5c8ee5 | 301 | /* Updated window if != 0. Set by update_window. */ |
4588ec20 | 302 | |
5f5c8ee5 | 303 | struct window *updated_window; |
4588ec20 | 304 | |
5f5c8ee5 | 305 | /* Glyph row updated in update_window_line, and area that is updated. */ |
4588ec20 | 306 | |
5f5c8ee5 GM |
307 | struct glyph_row *updated_row; |
308 | int updated_area; | |
4588ec20 | 309 | |
5f5c8ee5 | 310 | /* A glyph for a space. */ |
4588ec20 | 311 | |
5f5c8ee5 | 312 | struct glyph space_glyph; |
4588ec20 | 313 | |
5f5c8ee5 GM |
314 | /* Non-zero means update has been performed directly, so that there's |
315 | no need for redisplay_internal to do much work. Set by | |
316 | direct_output_for_insert. */ | |
4588ec20 | 317 | |
5f5c8ee5 | 318 | int redisplay_performed_directly_p; |
4588ec20 | 319 | |
5f5c8ee5 GM |
320 | /* Counts of allocated structures. These counts serve to diagnose |
321 | memory leaks and double frees. */ | |
4588ec20 | 322 | |
5f5c8ee5 GM |
323 | int glyph_matrix_count; |
324 | int glyph_pool_count; | |
4588ec20 | 325 | |
5f5c8ee5 GM |
326 | /* If non-null, the frame whose frame matrices are manipulated. If |
327 | null, window matrices are worked on. */ | |
4588ec20 | 328 | |
5f5c8ee5 | 329 | static struct frame *frame_matrix_frame; |
4588ec20 | 330 | |
5f5c8ee5 GM |
331 | /* Current interface for window-based redisplay. Set from init_xterm. |
332 | A null value means we are not using window-based redisplay. */ | |
4588ec20 | 333 | |
5f5c8ee5 | 334 | struct redisplay_interface *rif; |
4588ec20 | 335 | |
5f5c8ee5 GM |
336 | /* Non-zero means that fonts have been loaded since the last glyph |
337 | matrix adjustments. Redisplay must stop, and glyph matrices must | |
338 | be adjusted when this flag becomes non-zero during display. The | |
339 | reason fonts can be loaded so late is that fonts of fontsets are | |
340 | loaded on demand. */ | |
836d2cde | 341 | |
5f5c8ee5 | 342 | int fonts_changed_p; |
836d2cde | 343 | |
177c0ea7 | 344 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 345 | This may only be used for terminal frames. */ |
836d2cde | 346 | |
5f5c8ee5 | 347 | #if GLYPH_DEBUG |
4588ec20 | 348 | |
5f5c8ee5 GM |
349 | static int window_to_frame_vpos P_ ((struct window *, int)); |
350 | static int window_to_frame_hpos P_ ((struct window *, int)); | |
351 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) | |
352 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 353 | |
9b0e97aa GM |
354 | /* One element of the ring buffer containing redisplay history |
355 | information. */ | |
356 | ||
357 | struct redisplay_history | |
358 | { | |
359 | char trace[512 + 100]; | |
360 | }; | |
361 | ||
362 | /* The size of the history buffer. */ | |
363 | ||
364 | #define REDISPLAY_HISTORY_SIZE 30 | |
365 | ||
366 | /* The redisplay history buffer. */ | |
367 | ||
368 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
369 | ||
370 | /* Next free entry in redisplay_history. */ | |
371 | ||
372 | static int history_idx; | |
373 | ||
374 | /* A tick that's incremented each time something is added to the | |
375 | history. */ | |
376 | ||
377 | static unsigned history_tick; | |
378 | ||
379 | static void add_frame_display_history P_ ((struct frame *, int)); | |
380 | static void add_window_display_history P_ ((struct window *, char *, int)); | |
6a8aec41 | 381 | \f |
9b0e97aa GM |
382 | /* Add to the redisplay history how window W has been displayed. |
383 | MSG is a trace containing the information how W's glyph matrix | |
153a073c | 384 | has been constructed. PAUSED_P non-zero means that the update |
9b0e97aa GM |
385 | has been interrupted for pending input. */ |
386 | ||
387 | static void | |
388 | add_window_display_history (w, msg, paused_p) | |
389 | struct window *w; | |
390 | char *msg; | |
391 | int paused_p; | |
392 | { | |
393 | char *buf; | |
177c0ea7 | 394 | |
9b0e97aa GM |
395 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
396 | history_idx = 0; | |
397 | buf = redisplay_history[history_idx].trace; | |
398 | ++history_idx; | |
177c0ea7 | 399 | |
9b0e97aa GM |
400 | sprintf (buf, "%d: window %p (`%s')%s\n", |
401 | history_tick++, | |
402 | w, | |
403 | ((BUFFERP (w->buffer) | |
404 | && STRINGP (XBUFFER (w->buffer)->name)) | |
d5db4077 | 405 | ? (char *) SDATA (XBUFFER (w->buffer)->name) |
9b0e97aa GM |
406 | : "???"), |
407 | paused_p ? " ***paused***" : ""); | |
408 | strcat (buf, msg); | |
409 | } | |
410 | ||
411 | ||
412 | /* Add to the redisplay history that frame F has been displayed. | |
413 | PAUSED_P non-zero means that the update has been interrupted for | |
414 | pending input. */ | |
415 | ||
416 | static void | |
417 | add_frame_display_history (f, paused_p) | |
418 | struct frame *f; | |
419 | int paused_p; | |
420 | { | |
421 | char *buf; | |
177c0ea7 | 422 | |
9b0e97aa GM |
423 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
424 | history_idx = 0; | |
425 | buf = redisplay_history[history_idx].trace; | |
426 | ++history_idx; | |
177c0ea7 | 427 | |
9b0e97aa GM |
428 | sprintf (buf, "%d: update frame %p%s", |
429 | history_tick++, | |
430 | f, paused_p ? " ***paused***" : ""); | |
431 | } | |
432 | ||
433 | ||
434 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, | |
435 | Sdump_redisplay_history, 0, 0, "", | |
7ee72033 MB |
436 | doc: /* Dump redisplay history to stderr. */) |
437 | () | |
9b0e97aa GM |
438 | { |
439 | int i; | |
440 | ||
441 | for (i = history_idx - 1; i != history_idx; --i) | |
442 | { | |
443 | if (i < 0) | |
444 | i = REDISPLAY_HISTORY_SIZE - 1; | |
445 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
446 | } | |
447 | ||
448 | return Qnil; | |
449 | } | |
450 | ||
451 | ||
5f5c8ee5 | 452 | #else /* GLYPH_DEBUG == 0 */ |
4588ec20 | 453 | |
7df02016 KS |
454 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
455 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 456 | |
5f5c8ee5 | 457 | #endif /* GLYPH_DEBUG == 0 */ |
4588ec20 | 458 | |
4588ec20 | 459 | |
5f5c8ee5 GM |
460 | /* Like bcopy except never gets confused by overlap. Let this be the |
461 | first function defined in this file, or change emacs.c where the | |
462 | address of this function is used. */ | |
4588ec20 JB |
463 | |
464 | void | |
465 | safe_bcopy (from, to, size) | |
ea64076a KR |
466 | const char *from; |
467 | char *to; | |
4588ec20 JB |
468 | int size; |
469 | { | |
b5c685f4 | 470 | if (size <= 0 || from == to) |
4588ec20 JB |
471 | return; |
472 | ||
b5c685f4 JB |
473 | /* If the source and destination don't overlap, then bcopy can |
474 | handle it. If they do overlap, but the destination is lower in | |
475 | memory than the source, we'll assume bcopy can handle that. */ | |
476 | if (to < from || from + size <= to) | |
477 | bcopy (from, to, size); | |
478 | ||
479 | /* Otherwise, we'll copy from the end. */ | |
480 | else | |
4588ec20 | 481 | { |
ea64076a | 482 | register const char *endf = from + size; |
b5c685f4 | 483 | register char *endt = to + size; |
4588ec20 JB |
484 | |
485 | /* If TO - FROM is large, then we should break the copy into | |
486 | nonoverlapping chunks of TO - FROM bytes each. However, if | |
487 | TO - FROM is small, then the bcopy function call overhead | |
488 | makes this not worth it. The crossover point could be about | |
b5c685f4 JB |
489 | anywhere. Since I don't think the obvious copy loop is too |
490 | bad, I'm trying to err in its favor. */ | |
4588ec20 JB |
491 | if (to - from < 64) |
492 | { | |
493 | do | |
494 | *--endt = *--endf; | |
495 | while (endf != from); | |
496 | } | |
497 | else | |
498 | { | |
b5c685f4 | 499 | for (;;) |
4588ec20 JB |
500 | { |
501 | endt -= (to - from); | |
502 | endf -= (to - from); | |
503 | ||
b5c685f4 JB |
504 | if (endt < to) |
505 | break; | |
506 | ||
4588ec20 JB |
507 | bcopy (endf, endt, to - from); |
508 | } | |
b5c685f4 JB |
509 | |
510 | /* If SIZE wasn't a multiple of TO - FROM, there will be a | |
5f5c8ee5 GM |
511 | little left over. The amount left over is (endt + (to - |
512 | from)) - to, which is endt - from. */ | |
4588ec20 JB |
513 | bcopy (from, to, endt - from); |
514 | } | |
515 | } | |
177c0ea7 | 516 | } |
4588ec20 | 517 | |
4588ec20 | 518 | |
5f5c8ee5 GM |
519 | \f |
520 | /*********************************************************************** | |
521 | Glyph Matrices | |
522 | ***********************************************************************/ | |
523 | ||
524 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
525 | pool from which memory for the matrix should be allocated, or null | |
526 | for window-based redisplay where no glyph pools are used. The | |
527 | member `pool' of the glyph matrix structure returned is set to | |
528 | POOL, the structure is otherwise zeroed. */ | |
529 | ||
530 | struct glyph_matrix * | |
531 | new_glyph_matrix (pool) | |
532 | struct glyph_pool *pool; | |
4588ec20 | 533 | { |
5f5c8ee5 GM |
534 | struct glyph_matrix *result; |
535 | ||
536 | /* Allocate and clear. */ | |
537 | result = (struct glyph_matrix *) xmalloc (sizeof *result); | |
538 | bzero (result, sizeof *result); | |
4588ec20 | 539 | |
5f5c8ee5 GM |
540 | /* Increment number of allocated matrices. This count is used |
541 | to detect memory leaks. */ | |
542 | ++glyph_matrix_count; | |
4588ec20 | 543 | |
5f5c8ee5 GM |
544 | /* Set pool and return. */ |
545 | result->pool = pool; | |
546 | return result; | |
4588ec20 JB |
547 | } |
548 | ||
4588ec20 | 549 | |
5f5c8ee5 GM |
550 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
551 | ||
552 | The global counter glyph_matrix_count is decremented when a matrix | |
553 | is freed. If the count gets negative, more structures were freed | |
554 | than allocated, i.e. one matrix was freed more than once or a bogus | |
555 | pointer was passed to this function. | |
177c0ea7 | 556 | |
5f5c8ee5 GM |
557 | If MATRIX->pool is null, this means that the matrix manages its own |
558 | glyph memory---this is done for matrices on X frames. Freeing the | |
559 | matrix also frees the glyph memory in this case. */ | |
560 | ||
561 | static void | |
562 | free_glyph_matrix (matrix) | |
563 | struct glyph_matrix *matrix; | |
4588ec20 | 564 | { |
5f5c8ee5 GM |
565 | if (matrix) |
566 | { | |
567 | int i; | |
568 | ||
569 | /* Detect the case that more matrices are freed than were | |
570 | allocated. */ | |
571 | if (--glyph_matrix_count < 0) | |
572 | abort (); | |
573 | ||
574 | /* Free glyph memory if MATRIX owns it. */ | |
575 | if (matrix->pool == NULL) | |
576 | for (i = 0; i < matrix->rows_allocated; ++i) | |
577 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 578 | |
5f5c8ee5 GM |
579 | /* Free row structures and the matrix itself. */ |
580 | xfree (matrix->rows); | |
581 | xfree (matrix); | |
582 | } | |
583 | } | |
4588ec20 | 584 | |
4588ec20 | 585 | |
5f5c8ee5 GM |
586 | /* Return the number of glyphs to reserve for a marginal area of |
587 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
588 | display line of window W. MARGIN gives the width of the marginal | |
589 | area in canonical character units. MARGIN should be an integer | |
590 | or a float. */ | |
591 | ||
592 | static int | |
593 | margin_glyphs_to_reserve (w, total_glyphs, margin) | |
594 | struct window *w; | |
595 | int total_glyphs; | |
596 | Lisp_Object margin; | |
597 | { | |
598 | int n; | |
4588ec20 | 599 | |
5f5c8ee5 | 600 | if (NUMBERP (margin)) |
4588ec20 | 601 | { |
7df02016 | 602 | int width = XFASTINT (w->total_cols); |
5f5c8ee5 GM |
603 | double d = max (0, XFLOATINT (margin)); |
604 | d = min (width / 2 - 1, d); | |
35ec832e | 605 | n = (int) ((double) total_glyphs / width * d); |
5f5c8ee5 GM |
606 | } |
607 | else | |
608 | n = 0; | |
609 | ||
610 | return n; | |
611 | } | |
612 | ||
4588ec20 | 613 | |
5f5c8ee5 GM |
614 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
615 | window sizes. | |
4588ec20 | 616 | |
5f5c8ee5 GM |
617 | W is null if the function is called for a frame glyph matrix. |
618 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
619 | indices of the first column and row of MATRIX within the frame | |
620 | matrix, if such a matrix exists. They are zero for purely | |
621 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 622 | |
5f5c8ee5 GM |
623 | In window-based redisplay, where no frame matrices exist, glyph |
624 | matrices manage their own glyph storage. Otherwise, they allocate | |
625 | storage from a common frame glyph pool which can be found in | |
626 | MATRIX->pool. | |
23b0200c | 627 | |
5f5c8ee5 GM |
628 | The reason for this memory management strategy is to avoid complete |
629 | frame redraws if possible. When we allocate from a common pool, a | |
630 | change of the location or size of a sub-matrix within the pool | |
631 | requires a complete redisplay of the frame because we cannot easily | |
632 | make sure that the current matrices of all windows still agree with | |
633 | what is displayed on the screen. While this is usually fast, it | |
634 | leads to screen flickering. */ | |
23b0200c | 635 | |
5f5c8ee5 GM |
636 | static void |
637 | adjust_glyph_matrix (w, matrix, x, y, dim) | |
638 | struct window *w; | |
639 | struct glyph_matrix *matrix; | |
640 | int x, y; | |
641 | struct dim dim; | |
642 | { | |
643 | int i; | |
644 | int new_rows; | |
645 | int marginal_areas_changed_p = 0; | |
045dee35 GM |
646 | int header_line_changed_p = 0; |
647 | int header_line_p = 0; | |
5f5c8ee5 | 648 | int left = -1, right = -1; |
7df02016 | 649 | int window_width = -1, window_height; |
5f5c8ee5 | 650 | |
e125a2e6 RS |
651 | /* See if W had a header line that has disappeared now, or vice versa. |
652 | Get W's size. */ | |
5f5c8ee5 GM |
653 | if (w) |
654 | { | |
e125a2e6 RS |
655 | window_box (w, -1, 0, 0, &window_width, &window_height); |
656 | ||
045dee35 GM |
657 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
658 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 659 | } |
045dee35 | 660 | matrix->header_line_p = header_line_p; |
23b0200c | 661 | |
e125a2e6 RS |
662 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
663 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
664 | haven't changed. This optimization is important because preserving |
665 | the matrix means preventing redisplay. */ | |
666 | if (matrix->pool == NULL) | |
667 | { | |
7df02016 KS |
668 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
669 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
5f5c8ee5 GM |
670 | xassert (left >= 0 && right >= 0); |
671 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs | |
672 | || right != matrix->right_margin_glyphs); | |
673 | ||
674 | if (!marginal_areas_changed_p | |
675 | && !fonts_changed_p | |
045dee35 | 676 | && !header_line_changed_p |
7df02016 KS |
677 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
678 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
679 | && matrix->window_height == window_height |
680 | && matrix->window_vscroll == w->vscroll | |
681 | && matrix->window_width == window_width) | |
682 | return; | |
683 | } | |
177c0ea7 | 684 | |
5f5c8ee5 GM |
685 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
686 | if (matrix->rows_allocated < dim.height) | |
687 | { | |
688 | int size = dim.height * sizeof (struct glyph_row); | |
689 | new_rows = dim.height - matrix->rows_allocated; | |
690 | matrix->rows = (struct glyph_row *) xrealloc (matrix->rows, size); | |
691 | bzero (matrix->rows + matrix->rows_allocated, | |
692 | new_rows * sizeof *matrix->rows); | |
693 | matrix->rows_allocated = dim.height; | |
694 | } | |
695 | else | |
696 | new_rows = 0; | |
60a8948a | 697 | |
5f5c8ee5 GM |
698 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
699 | on a frame not using window-based redisplay. Set up pointers for | |
700 | each row into the glyph pool. */ | |
701 | if (matrix->pool) | |
702 | { | |
703 | xassert (matrix->pool->glyphs); | |
177c0ea7 | 704 | |
5f5c8ee5 | 705 | if (w) |
60a8948a | 706 | { |
5f5c8ee5 | 707 | left = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 708 | w->left_margin_cols); |
5f5c8ee5 | 709 | right = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 710 | w->right_margin_cols); |
60a8948a | 711 | } |
5f5c8ee5 GM |
712 | else |
713 | left = right = 0; | |
177c0ea7 | 714 | |
5f5c8ee5 | 715 | for (i = 0; i < dim.height; ++i) |
60a8948a | 716 | { |
5f5c8ee5 | 717 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
718 | |
719 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
720 | = (matrix->pool->glyphs |
721 | + (y + i) * matrix->pool->ncolumns | |
722 | + x); | |
177c0ea7 | 723 | |
5f5c8ee5 GM |
724 | if (w == NULL |
725 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 726 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
727 | { |
728 | row->glyphs[TEXT_AREA] | |
729 | = row->glyphs[LEFT_MARGIN_AREA]; | |
730 | row->glyphs[RIGHT_MARGIN_AREA] | |
731 | = row->glyphs[TEXT_AREA] + dim.width; | |
732 | row->glyphs[LAST_AREA] | |
733 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
734 | } | |
735 | else | |
736 | { | |
737 | row->glyphs[TEXT_AREA] | |
738 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
739 | row->glyphs[RIGHT_MARGIN_AREA] | |
740 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
741 | row->glyphs[LAST_AREA] | |
742 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
743 | } | |
60a8948a | 744 | } |
177c0ea7 | 745 | |
5f5c8ee5 GM |
746 | matrix->left_margin_glyphs = left; |
747 | matrix->right_margin_glyphs = right; | |
748 | } | |
749 | else | |
750 | { | |
751 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
e125a2e6 RS |
752 | its own memory. It is a window matrix for window-based redisplay. |
753 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
754 | if (dim.width > matrix->matrix_w |
755 | || new_rows | |
045dee35 | 756 | || header_line_changed_p |
5f5c8ee5 | 757 | || marginal_areas_changed_p) |
4588ec20 | 758 | { |
5f5c8ee5 GM |
759 | struct glyph_row *row = matrix->rows; |
760 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 761 | |
5f5c8ee5 GM |
762 | while (row < end) |
763 | { | |
764 | row->glyphs[LEFT_MARGIN_AREA] | |
765 | = (struct glyph *) xrealloc (row->glyphs[LEFT_MARGIN_AREA], | |
766 | (dim.width | |
767 | * sizeof (struct glyph))); | |
177c0ea7 | 768 | |
5f5c8ee5 GM |
769 | /* The mode line never has marginal areas. */ |
770 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 771 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
772 | { |
773 | row->glyphs[TEXT_AREA] | |
774 | = row->glyphs[LEFT_MARGIN_AREA]; | |
775 | row->glyphs[RIGHT_MARGIN_AREA] | |
776 | = row->glyphs[TEXT_AREA] + dim.width; | |
777 | row->glyphs[LAST_AREA] | |
778 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
779 | } | |
780 | else | |
781 | { | |
782 | row->glyphs[TEXT_AREA] | |
783 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
784 | row->glyphs[RIGHT_MARGIN_AREA] | |
785 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
786 | row->glyphs[LAST_AREA] | |
787 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
788 | } | |
789 | ++row; | |
790 | } | |
4588ec20 JB |
791 | } |
792 | ||
5f5c8ee5 GM |
793 | xassert (left >= 0 && right >= 0); |
794 | matrix->left_margin_glyphs = left; | |
795 | matrix->right_margin_glyphs = right; | |
796 | } | |
177c0ea7 | 797 | |
5f5c8ee5 GM |
798 | /* Number of rows to be used by MATRIX. */ |
799 | matrix->nrows = dim.height; | |
3ed36514 | 800 | xassert (matrix->nrows >= 0); |
5f5c8ee5 | 801 | |
b7b20fbd | 802 | if (w) |
5f5c8ee5 | 803 | { |
b7b20fbd | 804 | if (matrix == w->current_matrix) |
4588ec20 | 805 | { |
b7b20fbd GM |
806 | /* Mark rows in a current matrix of a window as not having |
807 | valid contents. It's important to not do this for | |
808 | desired matrices. When Emacs starts, it may already be | |
809 | building desired matrices when this function runs. */ | |
810 | if (window_width < 0) | |
811 | window_width = window_box_width (w, -1); | |
177c0ea7 | 812 | |
b7b20fbd GM |
813 | /* Optimize the case that only the height has changed (C-x 2, |
814 | upper window). Invalidate all rows that are no longer part | |
815 | of the window. */ | |
816 | if (!marginal_areas_changed_p | |
73d75a62 GM |
817 | && !header_line_changed_p |
818 | && new_rows == 0 | |
819 | && dim.width == matrix->matrix_w | |
7df02016 KS |
820 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
821 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 822 | && matrix->window_width == window_width) |
b7b20fbd | 823 | { |
dd42b31a GM |
824 | /* Find the last row in the window. */ |
825 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
826 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
827 | { | |
26447967 | 828 | ++i; |
dd42b31a GM |
829 | break; |
830 | } | |
b7b20fbd GM |
831 | |
832 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 833 | are invalidated below. */ |
b7b20fbd GM |
834 | if (INTEGERP (w->window_end_vpos) |
835 | && XFASTINT (w->window_end_vpos) >= i) | |
836 | w->window_end_valid = Qnil; | |
177c0ea7 | 837 | |
b7b20fbd GM |
838 | while (i < matrix->nrows) |
839 | matrix->rows[i++].enabled_p = 0; | |
840 | } | |
841 | else | |
842 | { | |
843 | for (i = 0; i < matrix->nrows; ++i) | |
844 | matrix->rows[i].enabled_p = 0; | |
845 | } | |
5f5c8ee5 | 846 | } |
b7b20fbd | 847 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 848 | { |
b7b20fbd GM |
849 | /* Rows in desired matrices always have to be cleared; |
850 | redisplay expects this is the case when it runs, so it | |
851 | had better be the case when we adjust matrices between | |
852 | redisplays. */ | |
5f5c8ee5 GM |
853 | for (i = 0; i < matrix->nrows; ++i) |
854 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 855 | } |
4588ec20 | 856 | } |
177c0ea7 JB |
857 | |
858 | ||
5f5c8ee5 GM |
859 | /* Remember last values to be able to optimize frame redraws. */ |
860 | matrix->matrix_x = x; | |
861 | matrix->matrix_y = y; | |
862 | matrix->matrix_w = dim.width; | |
863 | matrix->matrix_h = dim.height; | |
864 | ||
865 | /* Record the top y location and height of W at the time the matrix | |
866 | was last adjusted. This is used to optimize redisplay above. */ | |
867 | if (w) | |
4588ec20 | 868 | { |
7df02016 KS |
869 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
870 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
871 | matrix->window_height = window_height; |
872 | matrix->window_width = window_width; | |
873 | matrix->window_vscroll = w->vscroll; | |
874 | } | |
875 | } | |
4588ec20 | 876 | |
4588ec20 | 877 | |
5f5c8ee5 GM |
878 | /* Reverse the contents of rows in MATRIX between START and END. The |
879 | contents of the row at END - 1 end up at START, END - 2 at START + | |
880 | 1 etc. This is part of the implementation of rotate_matrix (see | |
881 | below). */ | |
d52bad65 | 882 | |
5f5c8ee5 GM |
883 | static void |
884 | reverse_rows (matrix, start, end) | |
885 | struct glyph_matrix *matrix; | |
886 | int start, end; | |
887 | { | |
888 | int i, j; | |
23b0200c | 889 | |
5f5c8ee5 GM |
890 | for (i = start, j = end - 1; i < j; ++i, --j) |
891 | { | |
892 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
893 | initialization. */ | |
894 | struct glyph_row temp; | |
895 | temp = matrix->rows[i]; | |
896 | matrix->rows[i] = matrix->rows[j]; | |
897 | matrix->rows[j] = temp; | |
898 | } | |
899 | } | |
23b0200c | 900 | |
23b0200c | 901 | |
5f5c8ee5 GM |
902 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
903 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
904 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
905 | row structures are moved around). | |
60a8948a | 906 | |
5f5c8ee5 GM |
907 | The algorithm used for rotating the vector was, I believe, first |
908 | described by Kernighan. See the vector R as consisting of two | |
909 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
910 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
911 | and reverse the result to get (ArBr)r which is BA. Similar for | |
912 | rotating right. */ | |
913 | ||
914 | void | |
915 | rotate_matrix (matrix, first, last, by) | |
916 | struct glyph_matrix *matrix; | |
917 | int first, last, by; | |
918 | { | |
919 | if (by < 0) | |
920 | { | |
921 | /* Up (rotate left, i.e. towards lower indices). */ | |
922 | by = -by; | |
923 | reverse_rows (matrix, first, first + by); | |
924 | reverse_rows (matrix, first + by, last); | |
925 | reverse_rows (matrix, first, last); | |
926 | } | |
927 | else if (by > 0) | |
928 | { | |
929 | /* Down (rotate right, i.e. towards higher indices). */ | |
930 | reverse_rows (matrix, last - by, last); | |
931 | reverse_rows (matrix, first, last - by); | |
932 | reverse_rows (matrix, first, last); | |
933 | } | |
934 | } | |
935 | ||
936 | ||
937 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
938 | with indices START <= index < END. Increment positions by DELTA/ | |
939 | DELTA_BYTES. */ | |
940 | ||
941 | void | |
86c11ba1 | 942 | increment_matrix_positions (matrix, start, end, delta, delta_bytes) |
5f5c8ee5 GM |
943 | struct glyph_matrix *matrix; |
944 | int start, end, delta, delta_bytes; | |
945 | { | |
946 | /* Check that START and END are reasonable values. */ | |
947 | xassert (start >= 0 && start <= matrix->nrows); | |
948 | xassert (end >= 0 && end <= matrix->nrows); | |
949 | xassert (start <= end); | |
950 | ||
951 | for (; start < end; ++start) | |
86c11ba1 | 952 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
953 | } |
954 | ||
955 | ||
956 | /* Enable a range of rows in glyph matrix MATRIX. START and END are | |
957 | the row indices of the first and last + 1 row to enable. If | |
958 | ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */ | |
959 | ||
960 | void | |
961 | enable_glyph_matrix_rows (matrix, start, end, enabled_p) | |
962 | struct glyph_matrix *matrix; | |
963 | int start, end; | |
964 | int enabled_p; | |
965 | { | |
3ed36514 GM |
966 | xassert (start <= end); |
967 | xassert (start >= 0 && start < matrix->nrows); | |
968 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 969 | |
5f5c8ee5 GM |
970 | for (; start < end; ++start) |
971 | matrix->rows[start].enabled_p = enabled_p != 0; | |
972 | } | |
973 | ||
974 | ||
975 | /* Clear MATRIX. | |
976 | ||
977 | This empties all rows in MATRIX by setting the enabled_p flag for | |
978 | all rows of the matrix to zero. The function prepare_desired_row | |
979 | will eventually really clear a row when it sees one with a zero | |
980 | enabled_p flag. | |
981 | ||
982 | Resets update hints to defaults value. The only update hint | |
983 | currently present is the flag MATRIX->no_scrolling_p. */ | |
984 | ||
985 | void | |
986 | clear_glyph_matrix (matrix) | |
987 | struct glyph_matrix *matrix; | |
988 | { | |
989 | if (matrix) | |
990 | { | |
991 | enable_glyph_matrix_rows (matrix, 0, matrix->nrows, 0); | |
992 | matrix->no_scrolling_p = 0; | |
993 | } | |
994 | } | |
177c0ea7 | 995 | |
5f5c8ee5 GM |
996 | |
997 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
998 | Increment y-positions in glyph rows between START and END by DY, | |
999 | and recompute their visible height. */ | |
1000 | ||
1001 | void | |
1002 | shift_glyph_matrix (w, matrix, start, end, dy) | |
1003 | struct window *w; | |
1004 | struct glyph_matrix *matrix; | |
1005 | int start, end, dy; | |
1006 | { | |
1007 | int min_y, max_y; | |
177c0ea7 | 1008 | |
5f5c8ee5 GM |
1009 | xassert (start <= end); |
1010 | xassert (start >= 0 && start < matrix->nrows); | |
1011 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 1012 | |
7df02016 KS |
1013 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
1014 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 1015 | |
5f5c8ee5 GM |
1016 | for (; start < end; ++start) |
1017 | { | |
1018 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 1019 | |
5f5c8ee5 | 1020 | row->y += dy; |
d6c747a4 | 1021 | row->visible_height = row->height; |
177c0ea7 | 1022 | |
5f5c8ee5 | 1023 | if (row->y < min_y) |
d6c747a4 GM |
1024 | row->visible_height -= min_y - row->y; |
1025 | if (row->y + row->height > max_y) | |
1026 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
1027 | } |
1028 | } | |
1029 | ||
1030 | ||
1031 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
1032 | invalid is done by setting enabled_p to zero for all rows in a | |
1033 | current matrix. */ | |
1034 | ||
1035 | void | |
1036 | clear_current_matrices (f) | |
1037 | register struct frame *f; | |
1038 | { | |
1039 | /* Clear frame current matrix, if we have one. */ | |
1040 | if (f->current_matrix) | |
1041 | clear_glyph_matrix (f->current_matrix); | |
1042 | ||
1043 | /* Clear the matrix of the menu bar window, if such a window exists. | |
1044 | The menu bar window is currently used to display menus on X when | |
1045 | no toolkit support is compiled in. */ | |
1046 | if (WINDOWP (f->menu_bar_window)) | |
1047 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
1048 | ||
9ea173e8 GM |
1049 | /* Clear the matrix of the tool-bar window, if any. */ |
1050 | if (WINDOWP (f->tool_bar_window)) | |
1051 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
5f5c8ee5 GM |
1052 | |
1053 | /* Clear current window matrices. */ | |
1054 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
1055 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); | |
1056 | } | |
1057 | ||
1058 | ||
1059 | /* Clear out all display lines of F for a coming redisplay. */ | |
1060 | ||
1061 | void | |
1062 | clear_desired_matrices (f) | |
1063 | register struct frame *f; | |
1064 | { | |
1065 | if (f->desired_matrix) | |
1066 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 1067 | |
5f5c8ee5 GM |
1068 | if (WINDOWP (f->menu_bar_window)) |
1069 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
1070 | ||
9ea173e8 GM |
1071 | if (WINDOWP (f->tool_bar_window)) |
1072 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
5f5c8ee5 GM |
1073 | |
1074 | /* Do it for window matrices. */ | |
1075 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
1076 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
1077 | } | |
1078 | ||
1079 | ||
1080 | /* Clear matrices in window tree rooted in W. If DESIRED_P is | |
1081 | non-zero clear desired matrices, otherwise clear current matrices. */ | |
1082 | ||
1083 | static void | |
1084 | clear_window_matrices (w, desired_p) | |
1085 | struct window *w; | |
1086 | int desired_p; | |
1087 | { | |
1088 | while (w) | |
1089 | { | |
1090 | if (!NILP (w->hchild)) | |
1091 | { | |
1092 | xassert (WINDOWP (w->hchild)); | |
1093 | clear_window_matrices (XWINDOW (w->hchild), desired_p); | |
1094 | } | |
1095 | else if (!NILP (w->vchild)) | |
1096 | { | |
1097 | xassert (WINDOWP (w->vchild)); | |
1098 | clear_window_matrices (XWINDOW (w->vchild), desired_p); | |
1099 | } | |
1100 | else | |
1101 | { | |
1102 | if (desired_p) | |
1103 | clear_glyph_matrix (w->desired_matrix); | |
1104 | else | |
1105 | { | |
1106 | clear_glyph_matrix (w->current_matrix); | |
1107 | w->window_end_valid = Qnil; | |
1108 | } | |
1109 | } | |
1110 | ||
1111 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
1112 | } | |
1113 | } | |
1114 | ||
1115 | ||
1116 | \f | |
1117 | /*********************************************************************** | |
1118 | Glyph Rows | |
1119 | ||
1120 | See dispextern.h for an overall explanation of glyph rows. | |
1121 | ***********************************************************************/ | |
1122 | ||
1123 | /* Clear glyph row ROW. Do it in a way that makes it robust against | |
1124 | changes in the glyph_row structure, i.e. addition or removal of | |
1125 | structure members. */ | |
1126 | ||
2cca872d KH |
1127 | static struct glyph_row null_row; |
1128 | ||
5f5c8ee5 GM |
1129 | void |
1130 | clear_glyph_row (row) | |
1131 | struct glyph_row *row; | |
1132 | { | |
1133 | struct glyph *p[1 + LAST_AREA]; | |
5f5c8ee5 GM |
1134 | |
1135 | /* Save pointers. */ | |
1136 | p[LEFT_MARGIN_AREA] = row->glyphs[LEFT_MARGIN_AREA]; | |
1137 | p[TEXT_AREA] = row->glyphs[TEXT_AREA]; | |
1138 | p[RIGHT_MARGIN_AREA] = row->glyphs[RIGHT_MARGIN_AREA]; | |
1139 | p[LAST_AREA] = row->glyphs[LAST_AREA]; | |
1140 | ||
1141 | /* Clear. */ | |
1142 | *row = null_row; | |
1143 | ||
1144 | /* Restore pointers. */ | |
1145 | row->glyphs[LEFT_MARGIN_AREA] = p[LEFT_MARGIN_AREA]; | |
1146 | row->glyphs[TEXT_AREA] = p[TEXT_AREA]; | |
1147 | row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA]; | |
1148 | row->glyphs[LAST_AREA] = p[LAST_AREA]; | |
45560b1a GM |
1149 | |
1150 | #if 0 /* At some point, some bit-fields of struct glyph were not set, | |
1151 | which made glyphs unequal when compared with GLYPH_EQUAL_P. | |
1152 | Redisplay outputs such glyphs, and flickering effects were | |
1153 | the result. This also depended on the contents of memory | |
1154 | returned by xmalloc. If flickering happens again, activate | |
153a073c | 1155 | the code below. If the flickering is gone with that, chances |
45560b1a GM |
1156 | are that the flickering has the same reason as here. */ |
1157 | bzero (p[0], (char *) p[LAST_AREA] - (char *) p[0]); | |
1158 | #endif | |
5f5c8ee5 GM |
1159 | } |
1160 | ||
1161 | ||
1162 | /* Make ROW an empty, enabled row of canonical character height, | |
1163 | in window W starting at y-position Y. */ | |
1164 | ||
1165 | void | |
1166 | blank_row (w, row, y) | |
1167 | struct window *w; | |
1168 | struct glyph_row *row; | |
1169 | int y; | |
1170 | { | |
1171 | int min_y, max_y; | |
177c0ea7 | 1172 | |
7df02016 KS |
1173 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
1174 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 1175 | |
5f5c8ee5 GM |
1176 | clear_glyph_row (row); |
1177 | row->y = y; | |
408f5064 | 1178 | row->ascent = row->phys_ascent = 0; |
7df02016 | 1179 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 1180 | row->visible_height = row->height; |
177c0ea7 | 1181 | |
5f5c8ee5 | 1182 | if (row->y < min_y) |
d6c747a4 GM |
1183 | row->visible_height -= min_y - row->y; |
1184 | if (row->y + row->height > max_y) | |
1185 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
1186 | |
1187 | row->enabled_p = 1; | |
1188 | } | |
1189 | ||
1190 | ||
1191 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
1192 | are the amounts by which to change positions. Note that the first | |
1193 | glyph of the text area of a row can have a buffer position even if | |
1194 | the used count of the text area is zero. Such rows display line | |
1195 | ends. */ | |
1196 | ||
1197 | void | |
86c11ba1 | 1198 | increment_row_positions (row, delta, delta_bytes) |
5f5c8ee5 GM |
1199 | struct glyph_row *row; |
1200 | int delta, delta_bytes; | |
1201 | { | |
1202 | int area, i; | |
1203 | ||
1204 | /* Increment start and end positions. */ | |
1205 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
1206 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
1207 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
1208 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
1209 | ||
5cacdcfd KS |
1210 | if (!row->enabled_p) |
1211 | return; | |
1212 | ||
5f5c8ee5 GM |
1213 | /* Increment positions in glyphs. */ |
1214 | for (area = 0; area < LAST_AREA; ++area) | |
1215 | for (i = 0; i < row->used[area]; ++i) | |
1216 | if (BUFFERP (row->glyphs[area][i].object) | |
1217 | && row->glyphs[area][i].charpos > 0) | |
1218 | row->glyphs[area][i].charpos += delta; | |
1219 | ||
1220 | /* Capture the case of rows displaying a line end. */ | |
1221 | if (row->used[TEXT_AREA] == 0 | |
1222 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1223 | row->glyphs[TEXT_AREA]->charpos += delta; | |
1224 | } | |
1225 | ||
1226 | ||
9af3e742 | 1227 | #if 0 |
5f5c8ee5 GM |
1228 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
1229 | contents, i.e. glyph structure contents are exchanged between A and | |
1230 | B without changing glyph pointers in A and B. */ | |
1231 | ||
1232 | static void | |
1233 | swap_glyphs_in_rows (a, b) | |
1234 | struct glyph_row *a, *b; | |
1235 | { | |
1236 | int area; | |
1237 | ||
1238 | for (area = 0; area < LAST_AREA; ++area) | |
1239 | { | |
1240 | /* Number of glyphs to swap. */ | |
1241 | int max_used = max (a->used[area], b->used[area]); | |
1242 | ||
1243 | /* Start of glyphs in area of row A. */ | |
1244 | struct glyph *glyph_a = a->glyphs[area]; | |
1245 | ||
1246 | /* End + 1 of glyphs in area of row A. */ | |
1247 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
1248 | ||
1249 | /* Start of glyphs in area of row B. */ | |
1250 | struct glyph *glyph_b = b->glyphs[area]; | |
1251 | ||
1252 | while (glyph_a < glyph_a_end) | |
1253 | { | |
1254 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
1255 | initialization. */ | |
1256 | struct glyph temp; | |
1257 | temp = *glyph_a; | |
1258 | *glyph_a = *glyph_b; | |
1259 | *glyph_b = temp; | |
1260 | ++glyph_a; | |
1261 | ++glyph_b; | |
1262 | } | |
1263 | } | |
1264 | } | |
1265 | ||
9af3e742 | 1266 | #endif /* 0 */ |
5f5c8ee5 GM |
1267 | |
1268 | /* Exchange pointers to glyph memory between glyph rows A and B. */ | |
1269 | ||
1270 | static INLINE void | |
1271 | swap_glyph_pointers (a, b) | |
1272 | struct glyph_row *a, *b; | |
1273 | { | |
1274 | int i; | |
1275 | for (i = 0; i < LAST_AREA + 1; ++i) | |
1276 | { | |
1277 | struct glyph *temp = a->glyphs[i]; | |
1278 | a->glyphs[i] = b->glyphs[i]; | |
1279 | b->glyphs[i] = temp; | |
1280 | } | |
1281 | } | |
1282 | ||
1283 | ||
1284 | /* Copy glyph row structure FROM to glyph row structure TO, except | |
1285 | that glyph pointers in the structures are left unchanged. */ | |
1286 | ||
1287 | INLINE void | |
1288 | copy_row_except_pointers (to, from) | |
1289 | struct glyph_row *to, *from; | |
1290 | { | |
1291 | struct glyph *pointers[1 + LAST_AREA]; | |
1292 | ||
1293 | /* Save glyph pointers of TO. */ | |
1294 | bcopy (to->glyphs, pointers, sizeof to->glyphs); | |
1295 | ||
1296 | /* Do a structure assignment. */ | |
1297 | *to = *from; | |
1298 | ||
1299 | /* Restore original pointers of TO. */ | |
1300 | bcopy (pointers, to->glyphs, sizeof to->glyphs); | |
1301 | } | |
1302 | ||
1303 | ||
1304 | /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in | |
1305 | TO and FROM are left unchanged. Glyph contents are copied from the | |
1306 | glyph memory of FROM to the glyph memory of TO. Increment buffer | |
1307 | positions in row TO by DELTA/ DELTA_BYTES. */ | |
1308 | ||
1309 | void | |
1310 | copy_glyph_row_contents (to, from, delta, delta_bytes) | |
1311 | struct glyph_row *to, *from; | |
1312 | int delta, delta_bytes; | |
1313 | { | |
1314 | int area; | |
1315 | ||
1316 | /* This is like a structure assignment TO = FROM, except that | |
1317 | glyph pointers in the rows are left unchanged. */ | |
1318 | copy_row_except_pointers (to, from); | |
1319 | ||
1320 | /* Copy glyphs from FROM to TO. */ | |
1321 | for (area = 0; area < LAST_AREA; ++area) | |
1322 | if (from->used[area]) | |
177c0ea7 | 1323 | bcopy (from->glyphs[area], to->glyphs[area], |
5f5c8ee5 GM |
1324 | from->used[area] * sizeof (struct glyph)); |
1325 | ||
1326 | /* Increment buffer positions in TO by DELTA. */ | |
86c11ba1 | 1327 | increment_row_positions (to, delta, delta_bytes); |
5f5c8ee5 GM |
1328 | } |
1329 | ||
1330 | ||
1331 | /* Assign glyph row FROM to glyph row TO. This works like a structure | |
1332 | assignment TO = FROM, except that glyph pointers are not copied but | |
1333 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1334 | a memory leak. */ | |
1335 | ||
1336 | static INLINE void | |
1337 | assign_row (to, from) | |
1338 | struct glyph_row *to, *from; | |
1339 | { | |
1340 | swap_glyph_pointers (to, from); | |
1341 | copy_row_except_pointers (to, from); | |
1342 | } | |
1343 | ||
1344 | ||
1345 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1346 | a row in a window matrix, is a slice of the glyph memory of the | |
1347 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
1348 | is non-zero if the glyph memory of WINDOW_ROW is part of the glyph | |
1349 | memory of FRAME_ROW. */ | |
1350 | ||
2d5912c1 | 1351 | #if GLYPH_DEBUG |
9339e87f | 1352 | |
5f5c8ee5 GM |
1353 | static int |
1354 | glyph_row_slice_p (window_row, frame_row) | |
1355 | struct glyph_row *window_row, *frame_row; | |
1356 | { | |
1357 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1358 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1359 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1360 | ||
1361 | return (frame_glyph_start <= window_glyph_start | |
1362 | && window_glyph_start < frame_glyph_end); | |
1363 | } | |
1364 | ||
9339e87f | 1365 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1366 | |
9af3e742 GM |
1367 | #if 0 |
1368 | ||
5f5c8ee5 GM |
1369 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1370 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1371 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1372 | ||
1373 | static struct glyph_row * | |
1374 | find_glyph_row_slice (window_matrix, frame_matrix, row) | |
1375 | struct glyph_matrix *window_matrix, *frame_matrix; | |
1376 | int row; | |
1377 | { | |
1378 | int i; | |
1379 | ||
1380 | xassert (row >= 0 && row < frame_matrix->nrows); | |
1381 | ||
1382 | for (i = 0; i < window_matrix->nrows; ++i) | |
1383 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1384 | frame_matrix->rows + row)) | |
1385 | break; | |
1386 | ||
1387 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1388 | } | |
1389 | ||
9af3e742 | 1390 | #endif /* 0 */ |
5f5c8ee5 GM |
1391 | |
1392 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1393 | i.e. they are only marked as to be cleared by setting their | |
1394 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1395 | call to this function really clears it. */ | |
1396 | ||
1397 | void | |
1398 | prepare_desired_row (row) | |
1399 | struct glyph_row *row; | |
1400 | { | |
1401 | if (!row->enabled_p) | |
1402 | { | |
1403 | clear_glyph_row (row); | |
1404 | row->enabled_p = 1; | |
1405 | } | |
1406 | } | |
1407 | ||
1408 | ||
1409 | /* Return a hash code for glyph row ROW. */ | |
1410 | ||
1411 | int | |
1412 | line_hash_code (row) | |
1413 | struct glyph_row *row; | |
1414 | { | |
1415 | int hash = 0; | |
177c0ea7 | 1416 | |
5f5c8ee5 GM |
1417 | if (row->enabled_p) |
1418 | { | |
4cecaab8 MB |
1419 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1420 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1421 | ||
1422 | while (glyph < end) | |
1423 | { | |
1424 | int c = glyph->u.ch; | |
1425 | int face_id = glyph->face_id; | |
1426 | if (must_write_spaces) | |
1427 | c -= SPACEGLYPH; | |
1428 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1429 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1430 | ++glyph; | |
1431 | } | |
5f5c8ee5 | 1432 | |
4cecaab8 MB |
1433 | if (hash == 0) |
1434 | hash = 1; | |
5f5c8ee5 GM |
1435 | } |
1436 | ||
1437 | return hash; | |
1438 | } | |
1439 | ||
1440 | ||
153a073c | 1441 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1442 | the number of characters in the line. If must_write_spaces is |
1443 | zero, leading and trailing spaces are ignored. */ | |
1444 | ||
1445 | static unsigned int | |
1446 | line_draw_cost (matrix, vpos) | |
1447 | struct glyph_matrix *matrix; | |
1448 | int vpos; | |
1449 | { | |
1450 | struct glyph_row *row = matrix->rows + vpos; | |
1451 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1452 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1453 | int len; | |
1454 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
1455 | int glyph_table_len = GLYPH_TABLE_LENGTH; | |
1456 | ||
1457 | /* Ignore trailing and leading spaces if we can. */ | |
1458 | if (!must_write_spaces) | |
1459 | { | |
1460 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1461 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1462 | --end; |
1463 | ||
177c0ea7 | 1464 | /* All blank line. */ |
5f5c8ee5 GM |
1465 | if (end == beg) |
1466 | return 0; | |
1467 | ||
1468 | /* Skip over leading spaces. */ | |
1469 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1470 | ++beg; | |
1471 | } | |
1472 | ||
1473 | /* If we don't have a glyph-table, each glyph is one character, | |
1474 | so return the number of glyphs. */ | |
1475 | if (glyph_table_base == 0) | |
1476 | len = end - beg; | |
1477 | else | |
1478 | { | |
1479 | /* Otherwise, scan the glyphs and accumulate their total length | |
1480 | in LEN. */ | |
1481 | len = 0; | |
1482 | while (beg < end) | |
1483 | { | |
1484 | GLYPH g = GLYPH_FROM_CHAR_GLYPH (*beg); | |
177c0ea7 | 1485 | |
42186983 KH |
1486 | if (g < 0 |
1487 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) | |
5f5c8ee5 GM |
1488 | len += 1; |
1489 | else | |
1490 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1491 | |
5f5c8ee5 GM |
1492 | ++beg; |
1493 | } | |
1494 | } | |
177c0ea7 | 1495 | |
5f5c8ee5 GM |
1496 | return len; |
1497 | } | |
1498 | ||
1499 | ||
1500 | /* Test two glyph rows A and B for equality. Value is non-zero if A | |
1501 | and B have equal contents. W is the window to which the glyphs | |
1502 | rows A and B belong. It is needed here to test for partial row | |
e4e0bee9 GM |
1503 | visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p |
1504 | flags of A and B, too. */ | |
5f5c8ee5 | 1505 | |
177c0ea7 | 1506 | static INLINE int |
e4e0bee9 | 1507 | row_equal_p (w, a, b, mouse_face_p) |
5f5c8ee5 GM |
1508 | struct window *w; |
1509 | struct glyph_row *a, *b; | |
e4e0bee9 | 1510 | int mouse_face_p; |
5f5c8ee5 GM |
1511 | { |
1512 | if (a == b) | |
1513 | return 1; | |
1514 | else if (a->hash != b->hash) | |
1515 | return 0; | |
1516 | else | |
1517 | { | |
1518 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1519 | int area; | |
1520 | ||
e4e0bee9 GM |
1521 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1522 | return 0; | |
1523 | ||
5f5c8ee5 GM |
1524 | /* Compare glyphs. */ |
1525 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1526 | { | |
1527 | if (a->used[area] != b->used[area]) | |
1528 | return 0; | |
177c0ea7 | 1529 | |
5f5c8ee5 GM |
1530 | a_glyph = a->glyphs[area]; |
1531 | a_end = a_glyph + a->used[area]; | |
1532 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1533 | |
5f5c8ee5 GM |
1534 | while (a_glyph < a_end |
1535 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1536 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1537 | |
5f5c8ee5 GM |
1538 | if (a_glyph != a_end) |
1539 | return 0; | |
1540 | } | |
1541 | ||
60e99293 KS |
1542 | if (a->fill_line_p != b->fill_line_p |
1543 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1544 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
5cbd733a | 1545 | || a->left_fringe_face_id != b->left_fringe_face_id |
60e99293 | 1546 | || a->right_fringe_bitmap != b->right_fringe_bitmap |
5cbd733a | 1547 | || a->right_fringe_face_id != b->right_fringe_face_id |
3d4a365f | 1548 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
60e99293 | 1549 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1550 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1551 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1552 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
1553 | /* Different partially visible characters on left margin. */ | |
1554 | || a->x != b->x | |
1555 | /* Different height. */ | |
1556 | || a->ascent != b->ascent | |
408f5064 GM |
1557 | || a->phys_ascent != b->phys_ascent |
1558 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1559 | || a->visible_height != b->visible_height) |
1560 | return 0; | |
1561 | } | |
1562 | ||
1563 | return 1; | |
1564 | } | |
1565 | ||
1566 | ||
1567 | \f | |
1568 | /*********************************************************************** | |
1569 | Glyph Pool | |
1570 | ||
1571 | See dispextern.h for an overall explanation of glyph pools. | |
1572 | ***********************************************************************/ | |
1573 | ||
1574 | /* Allocate a glyph_pool structure. The structure returned is | |
1575 | initialized with zeros. The global variable glyph_pool_count is | |
1576 | incremented for each pool allocated. */ | |
1577 | ||
1578 | static struct glyph_pool * | |
1579 | new_glyph_pool () | |
1580 | { | |
1581 | struct glyph_pool *result; | |
1582 | ||
1583 | /* Allocate a new glyph_pool and clear it. */ | |
1584 | result = (struct glyph_pool *) xmalloc (sizeof *result); | |
1585 | bzero (result, sizeof *result); | |
177c0ea7 | 1586 | |
5f5c8ee5 GM |
1587 | /* For memory leak and double deletion checking. */ |
1588 | ++glyph_pool_count; | |
177c0ea7 | 1589 | |
5f5c8ee5 GM |
1590 | return result; |
1591 | } | |
1592 | ||
1593 | ||
1594 | /* Free a glyph_pool structure POOL. The function may be called with | |
1595 | a null POOL pointer. The global variable glyph_pool_count is | |
1596 | decremented with every pool structure freed. If this count gets | |
1597 | negative, more structures were freed than allocated, i.e. one | |
1598 | structure must have been freed more than once or a bogus pointer | |
1599 | was passed to free_glyph_pool. */ | |
1600 | ||
1601 | static void | |
1602 | free_glyph_pool (pool) | |
1603 | struct glyph_pool *pool; | |
1604 | { | |
1605 | if (pool) | |
1606 | { | |
153a073c | 1607 | /* More freed than allocated? */ |
5f5c8ee5 GM |
1608 | --glyph_pool_count; |
1609 | xassert (glyph_pool_count >= 0); | |
1610 | ||
1611 | xfree (pool->glyphs); | |
1612 | xfree (pool); | |
1613 | } | |
1614 | } | |
1615 | ||
1616 | ||
1617 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1618 | columns we need. This function never shrinks a pool. The only | |
1619 | case in which this would make sense, would be when a frame's size | |
1620 | is changed from a large value to a smaller one. But, if someone | |
1621 | does it once, we can expect that he will do it again. | |
1622 | ||
1623 | Value is non-zero if the pool changed in a way which makes | |
1624 | re-adjusting window glyph matrices necessary. */ | |
1625 | ||
1626 | static int | |
1627 | realloc_glyph_pool (pool, matrix_dim) | |
1628 | struct glyph_pool *pool; | |
1629 | struct dim matrix_dim; | |
1630 | { | |
1631 | int needed; | |
1632 | int changed_p; | |
1633 | ||
1634 | changed_p = (pool->glyphs == 0 | |
1635 | || matrix_dim.height != pool->nrows | |
1636 | || matrix_dim.width != pool->ncolumns); | |
1637 | ||
1638 | /* Enlarge the glyph pool. */ | |
1639 | needed = matrix_dim.width * matrix_dim.height; | |
1640 | if (needed > pool->nglyphs) | |
1641 | { | |
1642 | int size = needed * sizeof (struct glyph); | |
1643 | ||
1644 | if (pool->glyphs) | |
1645 | pool->glyphs = (struct glyph *) xrealloc (pool->glyphs, size); | |
1646 | else | |
1647 | { | |
1648 | pool->glyphs = (struct glyph *) xmalloc (size); | |
1649 | bzero (pool->glyphs, size); | |
1650 | } | |
1651 | ||
1652 | pool->nglyphs = needed; | |
1653 | } | |
1654 | ||
153a073c | 1655 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1656 | to do sanity checks, and (b) the number of columns determines |
1657 | where rows in the frame matrix start---this must be available to | |
1658 | determine pointers to rows of window sub-matrices. */ | |
1659 | pool->nrows = matrix_dim.height; | |
1660 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1661 | |
5f5c8ee5 GM |
1662 | return changed_p; |
1663 | } | |
1664 | ||
1665 | ||
1666 | \f | |
1667 | /*********************************************************************** | |
1668 | Debug Code | |
1669 | ***********************************************************************/ | |
1670 | ||
1671 | #if GLYPH_DEBUG | |
1672 | ||
a13396c9 GM |
1673 | |
1674 | /* Flush standard output. This is sometimes useful to call from | |
1675 | the debugger. */ | |
1676 | ||
1677 | void | |
1678 | flush_stdout () | |
1679 | { | |
1680 | fflush (stdout); | |
1681 | } | |
1682 | ||
1683 | ||
5f5c8ee5 GM |
1684 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1685 | pointer has been lost, e.g. by using a structure assignment between | |
1686 | rows, at least one pointer must occur more than once in the rows of | |
1687 | MATRIX. */ | |
1688 | ||
1689 | void | |
1690 | check_matrix_pointer_lossage (matrix) | |
1691 | struct glyph_matrix *matrix; | |
1692 | { | |
1693 | int i, j; | |
177c0ea7 | 1694 | |
5f5c8ee5 GM |
1695 | for (i = 0; i < matrix->nrows; ++i) |
1696 | for (j = 0; j < matrix->nrows; ++j) | |
1697 | xassert (i == j | |
1698 | || (matrix->rows[i].glyphs[TEXT_AREA] | |
1699 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1700 | } | |
1701 | ||
1702 | ||
1703 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1704 | ||
1705 | struct glyph_row * | |
1706 | matrix_row (matrix, row) | |
1707 | struct glyph_matrix *matrix; | |
1708 | int row; | |
1709 | { | |
1710 | xassert (matrix && matrix->rows); | |
1711 | xassert (row >= 0 && row < matrix->nrows); | |
1712 | ||
1713 | /* That's really too slow for normal testing because this function | |
1714 | is called almost everywhere. Although---it's still astonishingly | |
1715 | fast, so it is valuable to have for debugging purposes. */ | |
1716 | #if 0 | |
1717 | check_matrix_pointer_lossage (matrix); | |
1718 | #endif | |
177c0ea7 | 1719 | |
5f5c8ee5 GM |
1720 | return matrix->rows + row; |
1721 | } | |
1722 | ||
1723 | ||
1724 | #if 0 /* This function makes invalid assumptions when text is | |
1725 | partially invisible. But it might come handy for debugging | |
1726 | nevertheless. */ | |
1727 | ||
1728 | /* Check invariants that must hold for an up to date current matrix of | |
1729 | window W. */ | |
1730 | ||
1731 | static void | |
1732 | check_matrix_invariants (w) | |
1733 | struct window *w; | |
1734 | { | |
1735 | struct glyph_matrix *matrix = w->current_matrix; | |
1736 | int yb = window_text_bottom_y (w); | |
1737 | struct glyph_row *row = matrix->rows; | |
1738 | struct glyph_row *last_text_row = NULL; | |
1739 | struct buffer *saved = current_buffer; | |
1740 | struct buffer *buffer = XBUFFER (w->buffer); | |
1741 | int c; | |
177c0ea7 | 1742 | |
5f5c8ee5 GM |
1743 | /* This can sometimes happen for a fresh window. */ |
1744 | if (matrix->nrows < 2) | |
1745 | return; | |
1746 | ||
1747 | set_buffer_temp (buffer); | |
1748 | ||
1749 | /* Note: last row is always reserved for the mode line. */ | |
1750 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1751 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1752 | { | |
1753 | struct glyph_row *next = row + 1; | |
1754 | ||
1755 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1756 | last_text_row = row; | |
1757 | ||
1758 | /* Check that character and byte positions are in sync. */ | |
1759 | xassert (MATRIX_ROW_START_BYTEPOS (row) | |
1760 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); | |
1761 | ||
1762 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1763 | have such a position temporarily in case of a minibuffer | |
1764 | displaying something like `[Sole completion]' at its end. */ | |
1765 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
1766 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1767 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); | |
1768 | ||
1769 | /* Check that end position of `row' is equal to start position | |
1770 | of next row. */ | |
1771 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1772 | { | |
1773 | xassert (MATRIX_ROW_END_CHARPOS (row) | |
1774 | == MATRIX_ROW_START_CHARPOS (next)); | |
1775 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1776 | == MATRIX_ROW_START_BYTEPOS (next)); | |
1777 | } | |
1778 | row = next; | |
1779 | } | |
1780 | ||
1781 | xassert (w->current_matrix->nrows == w->desired_matrix->nrows); | |
1782 | xassert (w->desired_matrix->rows != NULL); | |
1783 | set_buffer_temp (saved); | |
1784 | } | |
1785 | ||
1786 | #endif /* 0 */ | |
1787 | ||
1788 | #endif /* GLYPH_DEBUG != 0 */ | |
1789 | ||
1790 | ||
1791 | \f | |
1792 | /********************************************************************** | |
1793 | Allocating/ Adjusting Glyph Matrices | |
1794 | **********************************************************************/ | |
1795 | ||
1796 | /* Allocate glyph matrices over a window tree for a frame-based | |
1797 | redisplay | |
1798 | ||
1799 | X and Y are column/row within the frame glyph matrix where | |
1800 | sub-matrices for the window tree rooted at WINDOW must be | |
8ce2650d YM |
1801 | allocated. DIM_ONLY_P non-zero means that the caller of this |
1802 | function is only interested in the result matrix dimension, and | |
1803 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1804 | |
1805 | The function returns the total width/height of the sub-matrices of | |
1806 | the window tree. If called on a frame root window, the computation | |
1807 | will take the mini-buffer window into account. | |
1808 | ||
1809 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1810 | ||
1811 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1812 | glyph matrices yet, and | |
1813 | ||
1814 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1815 | any window in the tree will be changed or have been changed (see | |
153a073c | 1816 | DIM_ONLY_P) |
5f5c8ee5 GM |
1817 | |
1818 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1819 | function. | |
1820 | ||
1821 | Windows are arranged into chains of windows on the same level | |
1822 | through the next fields of window structures. Such a level can be | |
1823 | either a sequence of horizontally adjacent windows from left to | |
1824 | right, or a sequence of vertically adjacent windows from top to | |
1825 | bottom. Each window in a horizontal sequence can be either a leaf | |
1826 | window or a vertical sequence; a window in a vertical sequence can | |
1827 | be either a leaf or a horizontal sequence. All windows in a | |
1828 | horizontal sequence have the same height, and all windows in a | |
1829 | vertical sequence have the same width. | |
1830 | ||
1831 | This function uses, for historical reasons, a more general | |
1832 | algorithm to determine glyph matrix dimensions that would be | |
1833 | necessary. | |
1834 | ||
1835 | The matrix height of a horizontal sequence is determined by the | |
1836 | maximum height of any matrix in the sequence. The matrix width of | |
1837 | a horizontal sequence is computed by adding up matrix widths of | |
1838 | windows in the sequence. | |
1839 | ||
1840 | |<------- result width ------->| | |
1841 | +---------+----------+---------+ --- | |
1842 | | | | | | | |
1843 | | | | | | |
1844 | +---------+ | | result height | |
1845 | | +---------+ | |
1846 | | | | | |
1847 | +----------+ --- | |
1848 | ||
1849 | The matrix width of a vertical sequence is the maximum matrix width | |
1850 | of any window in the sequence. Its height is computed by adding up | |
1851 | matrix heights of windows in the sequence. | |
1852 | ||
1853 | |<---- result width -->| | |
1854 | +---------+ --- | |
1855 | | | | | |
1856 | | | | | |
1857 | +---------+--+ | | |
1858 | | | | | |
1859 | | | result height | |
1860 | | | | |
1861 | +------------+---------+ | | |
1862 | | | | | |
1863 | | | | | |
1864 | +------------+---------+ --- */ | |
1865 | ||
1866 | /* Bit indicating that a new matrix will be allocated or has been | |
1867 | allocated. */ | |
1868 | ||
1869 | #define NEW_LEAF_MATRIX (1 << 0) | |
1870 | ||
1871 | /* Bit indicating that a matrix will or has changed its location or | |
1872 | size. */ | |
1873 | ||
1874 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1875 | ||
1876 | static struct dim | |
5d3cc43c GM |
1877 | allocate_matrices_for_frame_redisplay (window, x, y, dim_only_p, |
1878 | window_change_flags) | |
5f5c8ee5 GM |
1879 | Lisp_Object window; |
1880 | int x, y; | |
5f5c8ee5 GM |
1881 | int dim_only_p; |
1882 | int *window_change_flags; | |
1883 | { | |
1884 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1885 | int x0 = x, y0 = y; | |
1886 | int wmax = 0, hmax = 0; | |
1887 | struct dim total; | |
1888 | struct dim dim; | |
1889 | struct window *w; | |
1890 | int in_horz_combination_p; | |
1891 | ||
1892 | /* What combination is WINDOW part of? Compute this once since the | |
1893 | result is the same for all windows in the `next' chain. The | |
1894 | special case of a root window (parent equal to nil) is treated | |
1895 | like a vertical combination because a root window's `next' | |
1896 | points to the mini-buffer window, if any, which is arranged | |
1897 | vertically below other windows. */ | |
1898 | in_horz_combination_p | |
1899 | = (!NILP (XWINDOW (window)->parent) | |
1900 | && !NILP (XWINDOW (XWINDOW (window)->parent)->hchild)); | |
1901 | ||
1902 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1903 | do |
5f5c8ee5 GM |
1904 | { |
1905 | w = XWINDOW (window); | |
1906 | ||
1907 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1908 | on whether this is a combination or a leaf window. */ |
5f5c8ee5 | 1909 | if (!NILP (w->hchild)) |
177c0ea7 | 1910 | dim = allocate_matrices_for_frame_redisplay (w->hchild, x, y, |
5f5c8ee5 GM |
1911 | dim_only_p, |
1912 | window_change_flags); | |
1913 | else if (!NILP (w->vchild)) | |
177c0ea7 | 1914 | dim = allocate_matrices_for_frame_redisplay (w->vchild, x, y, |
5f5c8ee5 GM |
1915 | dim_only_p, |
1916 | window_change_flags); | |
1917 | else | |
1918 | { | |
1919 | /* If not already done, allocate sub-matrix structures. */ | |
1920 | if (w->desired_matrix == NULL) | |
1921 | { | |
1922 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1923 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1924 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1925 | } | |
177c0ea7 | 1926 | |
5f5c8ee5 GM |
1927 | /* Width and height MUST be chosen so that there are no |
1928 | holes in the frame matrix. */ | |
5d3cc43c GM |
1929 | dim.width = required_matrix_width (w); |
1930 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1931 | |
1932 | /* Will matrix be re-allocated? */ | |
1933 | if (x != w->desired_matrix->matrix_x | |
1934 | || y != w->desired_matrix->matrix_y | |
1935 | || dim.width != w->desired_matrix->matrix_w | |
1936 | || dim.height != w->desired_matrix->matrix_h | |
1937 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1938 | w->left_margin_cols) |
5f5c8ee5 GM |
1939 | != w->desired_matrix->left_margin_glyphs) |
1940 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1941 | w->right_margin_cols) |
5f5c8ee5 GM |
1942 | != w->desired_matrix->right_margin_glyphs)) |
1943 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1944 | ||
1945 | /* Actually change matrices, if allowed. Do not consider | |
1946 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1947 | may have been changed which we don't now here. We trust | |
1948 | that we only will be called with DIM_ONLY_P != 0 when | |
1949 | necessary. */ | |
1950 | if (!dim_only_p) | |
1951 | { | |
1952 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1953 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1954 | } | |
1955 | } | |
1956 | ||
1957 | /* If we are part of a horizontal combination, advance x for | |
1958 | windows to the right of W; otherwise advance y for windows | |
1959 | below W. */ | |
1960 | if (in_horz_combination_p) | |
1961 | x += dim.width; | |
177c0ea7 | 1962 | else |
5f5c8ee5 GM |
1963 | y += dim.height; |
1964 | ||
1965 | /* Remember maximum glyph matrix dimensions. */ | |
1966 | wmax = max (wmax, dim.width); | |
1967 | hmax = max (hmax, dim.height); | |
1968 | ||
1969 | /* Next window on same level. */ | |
1970 | window = w->next; | |
1971 | } | |
1972 | while (!NILP (window)); | |
1973 | ||
1974 | /* Set `total' to the total glyph matrix dimension of this window | |
1975 | level. In a vertical combination, the width is the width of the | |
1976 | widest window; the height is the y we finally reached, corrected | |
1977 | by the y we started with. In a horizontal combination, the total | |
1978 | height is the height of the tallest window, and the width is the | |
1979 | x we finally reached, corrected by the x we started with. */ | |
1980 | if (in_horz_combination_p) | |
1981 | { | |
1982 | total.width = x - x0; | |
1983 | total.height = hmax; | |
1984 | } | |
177c0ea7 | 1985 | else |
5f5c8ee5 GM |
1986 | { |
1987 | total.width = wmax; | |
1988 | total.height = y - y0; | |
1989 | } | |
1990 | ||
1991 | return total; | |
1992 | } | |
1993 | ||
1994 | ||
5d3cc43c GM |
1995 | /* Return the required height of glyph matrices for window W. */ |
1996 | ||
1997 | int | |
1998 | required_matrix_height (w) | |
1999 | struct window *w; | |
2000 | { | |
2001 | #ifdef HAVE_WINDOW_SYSTEM | |
2002 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 2003 | |
5d3cc43c GM |
2004 | if (FRAME_WINDOW_P (f)) |
2005 | { | |
2006 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
2007 | int window_pixel_height = window_box_height (w) + abs (w->vscroll); | |
2008 | return (((window_pixel_height + ch_height - 1) | |
cc834cf9 | 2009 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
2010 | /* One partially visible line at the top and |
2011 | bottom of the window. */ | |
2012 | + 2 | |
153a073c | 2013 | /* 2 for header and mode line. */ |
5d3cc43c GM |
2014 | + 2); |
2015 | } | |
2016 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 2017 | |
7df02016 | 2018 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
2019 | } |
2020 | ||
2021 | ||
2022 | /* Return the required width of glyph matrices for window W. */ | |
2023 | ||
2024 | int | |
2025 | required_matrix_width (w) | |
2026 | struct window *w; | |
2027 | { | |
2028 | #ifdef HAVE_WINDOW_SYSTEM | |
2029 | struct frame *f = XFRAME (w->frame); | |
2030 | if (FRAME_WINDOW_P (f)) | |
2031 | { | |
2032 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 2033 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 2034 | |
5d3cc43c GM |
2035 | /* Compute number of glyphs needed in a glyph row. */ |
2036 | return (((window_pixel_width + ch_width - 1) | |
cc834cf9 | 2037 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
2038 | /* 2 partially visible columns in the text area. */ |
2039 | + 2 | |
2040 | /* One partially visible column at the right | |
2041 | edge of each marginal area. */ | |
2042 | + 1 + 1); | |
2043 | } | |
2044 | #endif /* HAVE_WINDOW_SYSTEM */ | |
2045 | ||
7df02016 | 2046 | return XINT (w->total_cols); |
5d3cc43c GM |
2047 | } |
2048 | ||
2049 | ||
5f5c8ee5 | 2050 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 2051 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 2052 | |
5f5c8ee5 | 2053 | static void |
5d3cc43c | 2054 | allocate_matrices_for_window_redisplay (w) |
5f5c8ee5 | 2055 | struct window *w; |
5f5c8ee5 | 2056 | { |
5f5c8ee5 GM |
2057 | while (w) |
2058 | { | |
2059 | if (!NILP (w->vchild)) | |
5d3cc43c | 2060 | allocate_matrices_for_window_redisplay (XWINDOW (w->vchild)); |
5f5c8ee5 | 2061 | else if (!NILP (w->hchild)) |
5d3cc43c | 2062 | allocate_matrices_for_window_redisplay (XWINDOW (w->hchild)); |
5f5c8ee5 GM |
2063 | else |
2064 | { | |
2065 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
2066 | struct dim dim; |
2067 | ||
2068 | /* If matrices are not yet allocated, allocate them now. */ | |
2069 | if (w->desired_matrix == NULL) | |
2070 | { | |
2071 | w->desired_matrix = new_glyph_matrix (NULL); | |
2072 | w->current_matrix = new_glyph_matrix (NULL); | |
2073 | } | |
2074 | ||
5d3cc43c GM |
2075 | dim.width = required_matrix_width (w); |
2076 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
2077 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
2078 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
2079 | } | |
177c0ea7 | 2080 | |
5f5c8ee5 GM |
2081 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
2082 | } | |
2083 | } | |
2084 | ||
2085 | ||
2086 | /* Re-allocate/ re-compute glyph matrices on frame F. If F is null, | |
2087 | do it for all frames; otherwise do it just for the given frame. | |
2088 | This function must be called when a new frame is created, its size | |
2089 | changes, or its window configuration changes. */ | |
2090 | ||
2091 | void | |
2092 | adjust_glyphs (f) | |
2093 | struct frame *f; | |
2094 | { | |
408f5064 GM |
2095 | /* Block input so that expose events and other events that access |
2096 | glyph matrices are not processed while we are changing them. */ | |
2097 | BLOCK_INPUT; | |
2098 | ||
5f5c8ee5 GM |
2099 | if (f) |
2100 | adjust_frame_glyphs (f); | |
2101 | else | |
2102 | { | |
2103 | Lisp_Object tail, lisp_frame; | |
177c0ea7 | 2104 | |
5f5c8ee5 GM |
2105 | FOR_EACH_FRAME (tail, lisp_frame) |
2106 | adjust_frame_glyphs (XFRAME (lisp_frame)); | |
2107 | } | |
408f5064 GM |
2108 | |
2109 | UNBLOCK_INPUT; | |
5f5c8ee5 GM |
2110 | } |
2111 | ||
2112 | ||
2113 | /* Adjust frame glyphs when Emacs is initialized. | |
177c0ea7 JB |
2114 | |
2115 | To be called from init_display. | |
2116 | ||
5f5c8ee5 GM |
2117 | We need a glyph matrix because redraw will happen soon. |
2118 | Unfortunately, window sizes on selected_frame are not yet set to | |
2119 | meaningful values. I believe we can assume that there are only two | |
2120 | windows on the frame---the mini-buffer and the root window. Frame | |
2121 | height and width seem to be correct so far. So, set the sizes of | |
2122 | windows to estimated values. */ | |
2123 | ||
2124 | static void | |
2125 | adjust_frame_glyphs_initially () | |
2126 | { | |
91fb7e1b GM |
2127 | struct frame *sf = SELECTED_FRAME (); |
2128 | struct window *root = XWINDOW (sf->root_window); | |
5f5c8ee5 | 2129 | struct window *mini = XWINDOW (root->next); |
7df02016 KS |
2130 | int frame_lines = FRAME_LINES (sf); |
2131 | int frame_cols = FRAME_COLS (sf); | |
91fb7e1b | 2132 | int top_margin = FRAME_TOP_MARGIN (sf); |
5f5c8ee5 GM |
2133 | |
2134 | /* Do it for the root window. */ | |
7df02016 KS |
2135 | XSETFASTINT (root->top_line, top_margin); |
2136 | XSETFASTINT (root->total_cols, frame_cols); | |
2137 | set_window_height (sf->root_window, frame_lines - 1 - top_margin, 0); | |
5f5c8ee5 GM |
2138 | |
2139 | /* Do it for the mini-buffer window. */ | |
7df02016 KS |
2140 | XSETFASTINT (mini->top_line, frame_lines - 1); |
2141 | XSETFASTINT (mini->total_cols, frame_cols); | |
5f5c8ee5 GM |
2142 | set_window_height (root->next, 1, 0); |
2143 | ||
91fb7e1b | 2144 | adjust_frame_glyphs (sf); |
5f5c8ee5 GM |
2145 | glyphs_initialized_initially_p = 1; |
2146 | } | |
177c0ea7 | 2147 | |
5f5c8ee5 GM |
2148 | |
2149 | /* Allocate/reallocate glyph matrices of a single frame F. */ | |
2150 | ||
2151 | static void | |
2152 | adjust_frame_glyphs (f) | |
2153 | struct frame *f; | |
2154 | { | |
2155 | if (FRAME_WINDOW_P (f)) | |
2156 | adjust_frame_glyphs_for_window_redisplay (f); | |
2157 | else | |
2158 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 2159 | |
5f5c8ee5 GM |
2160 | /* Don't forget the message buffer and the buffer for |
2161 | decode_mode_spec. */ | |
2162 | adjust_frame_message_buffer (f); | |
2163 | adjust_decode_mode_spec_buffer (f); | |
2164 | ||
2165 | f->glyphs_initialized_p = 1; | |
2166 | } | |
2167 | ||
075757cc CY |
2168 | /* Return 1 if any window in the tree has nonzero window margins. See |
2169 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ | |
2170 | static int | |
2171 | showing_window_margins_p (w) | |
2172 | struct window *w; | |
2173 | { | |
2174 | while (w) | |
2175 | { | |
2176 | if (!NILP (w->hchild)) | |
2177 | { | |
2178 | if (showing_window_margins_p (XWINDOW (w->hchild))) | |
2179 | return 1; | |
2180 | } | |
2181 | else if (!NILP (w->vchild)) | |
2182 | { | |
2183 | if (showing_window_margins_p (XWINDOW (w->vchild))) | |
2184 | return 1; | |
2185 | } | |
2186 | else if (!NILP (w->left_margin_cols) | |
2187 | || !NILP (w->right_margin_cols)) | |
2188 | return 1; | |
2189 | ||
2190 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2191 | } | |
2192 | return 0; | |
2193 | } | |
2194 | ||
5f5c8ee5 | 2195 | |
c9f00270 GM |
2196 | /* In the window tree with root W, build current matrices of leaf |
2197 | windows from the frame's current matrix. */ | |
2198 | ||
2199 | static void | |
2200 | fake_current_matrices (window) | |
2201 | Lisp_Object window; | |
2202 | { | |
2203 | struct window *w; | |
177c0ea7 | 2204 | |
c9f00270 GM |
2205 | for (; !NILP (window); window = w->next) |
2206 | { | |
2207 | w = XWINDOW (window); | |
177c0ea7 | 2208 | |
c9f00270 GM |
2209 | if (!NILP (w->hchild)) |
2210 | fake_current_matrices (w->hchild); | |
2211 | else if (!NILP (w->vchild)) | |
2212 | fake_current_matrices (w->vchild); | |
2213 | else | |
2214 | { | |
2215 | int i; | |
2216 | struct frame *f = XFRAME (w->frame); | |
2217 | struct glyph_matrix *m = w->current_matrix; | |
2218 | struct glyph_matrix *fm = f->current_matrix; | |
2219 | ||
7df02016 KS |
2220 | xassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
2221 | xassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 2222 | |
c9f00270 GM |
2223 | for (i = 0; i < m->matrix_h; ++i) |
2224 | { | |
2225 | struct glyph_row *r = m->rows + i; | |
7df02016 | 2226 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 GM |
2227 | |
2228 | xassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] | |
2229 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); | |
2230 | ||
2231 | r->enabled_p = fr->enabled_p; | |
2232 | if (r->enabled_p) | |
2233 | { | |
2234 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
2235 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
2236 | r->used[TEXT_AREA] = (m->matrix_w | |
2237 | - r->used[LEFT_MARGIN_AREA] | |
2238 | - r->used[RIGHT_MARGIN_AREA]); | |
2239 | r->mode_line_p = 0; | |
c9f00270 GM |
2240 | } |
2241 | } | |
2242 | } | |
2243 | } | |
2244 | } | |
2245 | ||
2246 | ||
bccee4f2 | 2247 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 2248 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 2249 | |
bccee4f2 GM |
2250 | static struct glyph_matrix * |
2251 | save_current_matrix (f) | |
31798cfe | 2252 | struct frame *f; |
c9f00270 | 2253 | { |
bccee4f2 GM |
2254 | int i; |
2255 | struct glyph_matrix *saved; | |
e797dea6 | 2256 | |
bccee4f2 GM |
2257 | saved = (struct glyph_matrix *) xmalloc (sizeof *saved); |
2258 | bzero (saved, sizeof *saved); | |
2259 | saved->nrows = f->current_matrix->nrows; | |
2260 | saved->rows = (struct glyph_row *) xmalloc (saved->nrows | |
2261 | * sizeof *saved->rows); | |
2262 | bzero (saved->rows, saved->nrows * sizeof *saved->rows); | |
2263 | ||
2264 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 2265 | { |
bccee4f2 GM |
2266 | struct glyph_row *from = f->current_matrix->rows + i; |
2267 | struct glyph_row *to = saved->rows + i; | |
2268 | size_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); | |
2269 | to->glyphs[TEXT_AREA] = (struct glyph *) xmalloc (nbytes); | |
2270 | bcopy (from->glyphs[TEXT_AREA], to->glyphs[TEXT_AREA], nbytes); | |
2271 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; | |
e797dea6 | 2272 | } |
bccee4f2 GM |
2273 | |
2274 | return saved; | |
2275 | } | |
2276 | ||
2277 | ||
2278 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
2279 | and free memory associated with SAVED. */ | |
2280 | ||
2281 | static void | |
2282 | restore_current_matrix (f, saved) | |
2283 | struct frame *f; | |
2284 | struct glyph_matrix *saved; | |
2285 | { | |
2286 | int i; | |
2287 | ||
2288 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 2289 | { |
bccee4f2 GM |
2290 | struct glyph_row *from = saved->rows + i; |
2291 | struct glyph_row *to = f->current_matrix->rows + i; | |
e797dea6 GM |
2292 | size_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
2293 | bcopy (from->glyphs[TEXT_AREA], to->glyphs[TEXT_AREA], nbytes); | |
2294 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; | |
bccee4f2 | 2295 | xfree (from->glyphs[TEXT_AREA]); |
e797dea6 | 2296 | } |
177c0ea7 | 2297 | |
bccee4f2 GM |
2298 | xfree (saved->rows); |
2299 | xfree (saved); | |
c9f00270 GM |
2300 | } |
2301 | ||
2302 | ||
bccee4f2 | 2303 | |
5f5c8ee5 GM |
2304 | /* Allocate/reallocate glyph matrices of a single frame F for |
2305 | frame-based redisplay. */ | |
2306 | ||
2307 | static void | |
2308 | adjust_frame_glyphs_for_frame_redisplay (f) | |
2309 | struct frame *f; | |
2310 | { | |
5f5c8ee5 GM |
2311 | struct dim matrix_dim; |
2312 | int pool_changed_p; | |
2313 | int window_change_flags; | |
2314 | int top_window_y; | |
2315 | ||
2316 | if (!FRAME_LIVE_P (f)) | |
2317 | return; | |
2318 | ||
5f5c8ee5 GM |
2319 | top_window_y = FRAME_TOP_MARGIN (f); |
2320 | ||
2321 | /* Allocate glyph pool structures if not already done. */ | |
2322 | if (f->desired_pool == NULL) | |
2323 | { | |
2324 | f->desired_pool = new_glyph_pool (); | |
2325 | f->current_pool = new_glyph_pool (); | |
2326 | } | |
2327 | ||
2328 | /* Allocate frames matrix structures if needed. */ | |
2329 | if (f->desired_matrix == NULL) | |
2330 | { | |
2331 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
2332 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
2333 | } | |
177c0ea7 | 2334 | |
5f5c8ee5 GM |
2335 | /* Compute window glyph matrices. (This takes the mini-buffer |
2336 | window into account). The result is the size of the frame glyph | |
2337 | matrix needed. The variable window_change_flags is set to a bit | |
2338 | mask indicating whether new matrices will be allocated or | |
2339 | existing matrices change their size or location within the frame | |
2340 | matrix. */ | |
2341 | window_change_flags = 0; | |
2342 | matrix_dim | |
2343 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
2344 | 0, top_window_y, | |
5d3cc43c | 2345 | 1, |
5f5c8ee5 GM |
2346 | &window_change_flags); |
2347 | ||
2348 | /* Add in menu bar lines, if any. */ | |
2349 | matrix_dim.height += top_window_y; | |
2350 | ||
2351 | /* Enlarge pools as necessary. */ | |
2352 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
2353 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
2354 | ||
177c0ea7 | 2355 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
2356 | absolutely necessary since it requires a frame redraw. */ |
2357 | if (pool_changed_p || window_change_flags) | |
2358 | { | |
2359 | /* Do it for window matrices. */ | |
2360 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 2361 | 0, top_window_y, 0, |
5f5c8ee5 GM |
2362 | &window_change_flags); |
2363 | ||
2364 | /* Size of frame matrices must equal size of frame. Note | |
2365 | that we are called for X frames with window widths NOT equal | |
2366 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
7df02016 KS |
2367 | xassert (matrix_dim.width == FRAME_COLS (f) |
2368 | && matrix_dim.height == FRAME_LINES (f)); | |
177c0ea7 | 2369 | |
e797dea6 GM |
2370 | /* Pointers to glyph memory in glyph rows are exchanged during |
2371 | the update phase of redisplay, which means in general that a | |
2372 | frame's current matrix consists of pointers into both the | |
2373 | desired and current glyph pool of the frame. Adjusting a | |
2374 | matrix sets the frame matrix up so that pointers are all into | |
2375 | the same pool. If we want to preserve glyph contents of the | |
2376 | current matrix over a call to adjust_glyph_matrix, we must | |
2377 | make a copy of the current glyphs, and restore the current | |
2378 | matrix' contents from that copy. */ | |
2379 | if (display_completed | |
2380 | && !FRAME_GARBAGED_P (f) | |
2381 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
2382 | && matrix_dim.height == f->current_matrix->matrix_h |
2383 | /* For some reason, the frame glyph matrix gets corrupted if | |
2384 | any of the windows contain margins. I haven't been able | |
2385 | to hunt down the reason, but for the moment this prevents | |
2386 | the problem from manifesting. -- cyd */ | |
2387 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) | |
e797dea6 | 2388 | { |
bccee4f2 GM |
2389 | struct glyph_matrix *copy = save_current_matrix (f); |
2390 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2391 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2392 | restore_current_matrix (f, copy); |
e797dea6 GM |
2393 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2394 | } | |
c9f00270 | 2395 | else |
e797dea6 | 2396 | { |
bccee4f2 | 2397 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2398 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2399 | SET_FRAME_GARBAGED (f); | |
2400 | } | |
5f5c8ee5 GM |
2401 | } |
2402 | } | |
2403 | ||
2404 | ||
2405 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2406 | window-based redisplay. */ | |
2407 | ||
2408 | static void | |
2409 | adjust_frame_glyphs_for_window_redisplay (f) | |
2410 | struct frame *f; | |
2411 | { | |
5f5c8ee5 GM |
2412 | struct window *w; |
2413 | ||
2414 | xassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); | |
177c0ea7 | 2415 | |
5f5c8ee5 | 2416 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2417 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2418 | |
8ce2650d | 2419 | #ifdef HAVE_X_WINDOWS |
5f5c8ee5 GM |
2420 | /* Allocate/ reallocate matrices of the dummy window used to display |
2421 | the menu bar under X when no X toolkit support is available. */ | |
488dd4c4 | 2422 | #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2423 | { |
2424 | /* Allocate a dummy window if not already done. */ | |
2425 | if (NILP (f->menu_bar_window)) | |
2426 | { | |
2427 | f->menu_bar_window = make_window (); | |
2428 | w = XWINDOW (f->menu_bar_window); | |
2429 | XSETFRAME (w->frame, f); | |
2430 | w->pseudo_window_p = 1; | |
2431 | } | |
2432 | else | |
2433 | w = XWINDOW (f->menu_bar_window); | |
2434 | ||
2435 | /* Set window dimensions to frame dimensions and allocate or | |
2436 | adjust glyph matrices of W. */ | |
7df02016 KS |
2437 | XSETFASTINT (w->top_line, 0); |
2438 | XSETFASTINT (w->left_col, 0); | |
2439 | XSETFASTINT (w->total_lines, FRAME_MENU_BAR_LINES (f)); | |
2440 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
5d3cc43c | 2441 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2442 | } |
57714a86 YM |
2443 | #endif /* not USE_X_TOOLKIT && not USE_GTK */ |
2444 | #endif /* HAVE_X_WINDOWS */ | |
5f5c8ee5 | 2445 | |
488dd4c4 | 2446 | #ifndef USE_GTK |
9ea173e8 GM |
2447 | /* Allocate/ reallocate matrices of the tool bar window. If we |
2448 | don't have a tool bar window yet, make one. */ | |
2449 | if (NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2450 | { |
9ea173e8 GM |
2451 | f->tool_bar_window = make_window (); |
2452 | w = XWINDOW (f->tool_bar_window); | |
5f5c8ee5 GM |
2453 | XSETFRAME (w->frame, f); |
2454 | w->pseudo_window_p = 1; | |
2455 | } | |
2456 | else | |
9ea173e8 | 2457 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2458 | |
7df02016 KS |
2459 | XSETFASTINT (w->top_line, FRAME_MENU_BAR_LINES (f)); |
2460 | XSETFASTINT (w->left_col, 0); | |
2461 | XSETFASTINT (w->total_lines, FRAME_TOOL_BAR_LINES (f)); | |
2462 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
5d3cc43c | 2463 | allocate_matrices_for_window_redisplay (w); |
488dd4c4 | 2464 | #endif |
5f5c8ee5 GM |
2465 | } |
2466 | ||
2467 | ||
177c0ea7 | 2468 | /* Adjust/ allocate message buffer of frame F. |
5f5c8ee5 | 2469 | |
5f5c8ee5 GM |
2470 | Note that the message buffer is never freed. Since I could not |
2471 | find a free in 19.34, I assume that freeing it would be | |
2472 | problematic in some way and don't do it either. | |
2473 | ||
2474 | (Implementation note: It should be checked if we can free it | |
2475 | eventually without causing trouble). */ | |
2476 | ||
2477 | static void | |
2478 | adjust_frame_message_buffer (f) | |
2479 | struct frame *f; | |
2480 | { | |
2481 | int size = FRAME_MESSAGE_BUF_SIZE (f) + 1; | |
2482 | ||
2483 | if (FRAME_MESSAGE_BUF (f)) | |
2484 | { | |
2485 | char *buffer = FRAME_MESSAGE_BUF (f); | |
2486 | char *new_buffer = (char *) xrealloc (buffer, size); | |
5f5c8ee5 GM |
2487 | FRAME_MESSAGE_BUF (f) = new_buffer; |
2488 | } | |
2489 | else | |
2490 | FRAME_MESSAGE_BUF (f) = (char *) xmalloc (size); | |
2491 | } | |
2492 | ||
2493 | ||
2494 | /* Re-allocate buffer for decode_mode_spec on frame F. */ | |
2495 | ||
2496 | static void | |
2497 | adjust_decode_mode_spec_buffer (f) | |
2498 | struct frame *f; | |
2499 | { | |
2500 | f->decode_mode_spec_buffer | |
2501 | = (char *) xrealloc (f->decode_mode_spec_buffer, | |
2502 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
2503 | } | |
2504 | ||
2505 | ||
2506 | \f | |
2507 | /********************************************************************** | |
2508 | Freeing Glyph Matrices | |
2509 | **********************************************************************/ | |
2510 | ||
2511 | /* Free glyph memory for a frame F. F may be null. This function can | |
2512 | be called for the same frame more than once. The root window of | |
2513 | F may be nil when this function is called. This is the case when | |
2514 | the function is called when F is destroyed. */ | |
2515 | ||
2516 | void | |
2517 | free_glyphs (f) | |
2518 | struct frame *f; | |
2519 | { | |
2520 | if (f && f->glyphs_initialized_p) | |
2521 | { | |
42f55fe0 GM |
2522 | /* Block interrupt input so that we don't get surprised by an X |
2523 | event while we're in an inconsistent state. */ | |
2524 | BLOCK_INPUT; | |
5f5c8ee5 | 2525 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2526 | |
5f5c8ee5 GM |
2527 | /* Release window sub-matrices. */ |
2528 | if (!NILP (f->root_window)) | |
2529 | free_window_matrices (XWINDOW (f->root_window)); | |
2530 | ||
2531 | /* Free the dummy window for menu bars without X toolkit and its | |
2532 | glyph matrices. */ | |
2533 | if (!NILP (f->menu_bar_window)) | |
2534 | { | |
2535 | struct window *w = XWINDOW (f->menu_bar_window); | |
2536 | free_glyph_matrix (w->desired_matrix); | |
2537 | free_glyph_matrix (w->current_matrix); | |
2538 | w->desired_matrix = w->current_matrix = NULL; | |
2539 | f->menu_bar_window = Qnil; | |
2540 | } | |
2541 | ||
9ea173e8 GM |
2542 | /* Free the tool bar window and its glyph matrices. */ |
2543 | if (!NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2544 | { |
9ea173e8 | 2545 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2546 | free_glyph_matrix (w->desired_matrix); |
2547 | free_glyph_matrix (w->current_matrix); | |
2548 | w->desired_matrix = w->current_matrix = NULL; | |
9ea173e8 | 2549 | f->tool_bar_window = Qnil; |
5f5c8ee5 GM |
2550 | } |
2551 | ||
2552 | /* Release frame glyph matrices. Reset fields to zero in | |
2553 | case we are called a second time. */ | |
2554 | if (f->desired_matrix) | |
2555 | { | |
2556 | free_glyph_matrix (f->desired_matrix); | |
2557 | free_glyph_matrix (f->current_matrix); | |
2558 | f->desired_matrix = f->current_matrix = NULL; | |
2559 | } | |
2560 | ||
2561 | /* Release glyph pools. */ | |
2562 | if (f->desired_pool) | |
2563 | { | |
2564 | free_glyph_pool (f->desired_pool); | |
2565 | free_glyph_pool (f->current_pool); | |
2566 | f->desired_pool = f->current_pool = NULL; | |
2567 | } | |
177c0ea7 | 2568 | |
42f55fe0 | 2569 | UNBLOCK_INPUT; |
5f5c8ee5 GM |
2570 | } |
2571 | } | |
2572 | ||
2573 | ||
2574 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2575 | function may be called with a null pointer, and it may be called on | |
2576 | the same tree more than once. */ | |
2577 | ||
2578 | void | |
2579 | free_window_matrices (w) | |
2580 | struct window *w; | |
2581 | { | |
2582 | while (w) | |
2583 | { | |
2584 | if (!NILP (w->hchild)) | |
2585 | free_window_matrices (XWINDOW (w->hchild)); | |
2586 | else if (!NILP (w->vchild)) | |
2587 | free_window_matrices (XWINDOW (w->vchild)); | |
177c0ea7 | 2588 | else |
5f5c8ee5 GM |
2589 | { |
2590 | /* This is a leaf window. Free its memory and reset fields | |
2591 | to zero in case this function is called a second time for | |
2592 | W. */ | |
2593 | free_glyph_matrix (w->current_matrix); | |
2594 | free_glyph_matrix (w->desired_matrix); | |
2595 | w->current_matrix = w->desired_matrix = NULL; | |
2596 | } | |
2597 | ||
2598 | /* Next window on same level. */ | |
2599 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2600 | } | |
2601 | } | |
2602 | ||
2603 | ||
2604 | /* Check glyph memory leaks. This function is called from | |
2605 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2606 | exits. We therefore free all glyph memory for all active frames | |
2607 | explicitly and check that nothing is left allocated. */ | |
2608 | ||
2609 | void | |
2610 | check_glyph_memory () | |
2611 | { | |
2612 | Lisp_Object tail, frame; | |
2613 | ||
2614 | /* Free glyph memory for all frames. */ | |
2615 | FOR_EACH_FRAME (tail, frame) | |
2616 | free_glyphs (XFRAME (frame)); | |
2617 | ||
2618 | /* Check that nothing is left allocated. */ | |
2619 | if (glyph_matrix_count) | |
2620 | abort (); | |
2621 | if (glyph_pool_count) | |
2622 | abort (); | |
2623 | } | |
2624 | ||
2625 | ||
2626 | \f | |
2627 | /********************************************************************** | |
2628 | Building a Frame Matrix | |
2629 | **********************************************************************/ | |
2630 | ||
2631 | /* Most of the redisplay code works on glyph matrices attached to | |
2632 | windows. This is a good solution most of the time, but it is not | |
2633 | suitable for terminal code. Terminal output functions cannot rely | |
2634 | on being able to set an arbitrary terminal window. Instead they | |
2635 | must be provided with a view of the whole frame, i.e. the whole | |
2636 | screen. We build such a view by constructing a frame matrix from | |
2637 | window matrices in this section. | |
2638 | ||
2639 | Windows that must be updated have their must_be_update_p flag set. | |
2640 | For all such windows, their desired matrix is made part of the | |
2641 | desired frame matrix. For other windows, their current matrix is | |
2642 | made part of the desired frame matrix. | |
2643 | ||
2644 | +-----------------+----------------+ | |
2645 | | desired | desired | | |
2646 | | | | | |
2647 | +-----------------+----------------+ | |
2648 | | current | | |
2649 | | | | |
2650 | +----------------------------------+ | |
2651 | ||
2652 | Desired window matrices can be made part of the frame matrix in a | |
2653 | cheap way: We exploit the fact that the desired frame matrix and | |
2654 | desired window matrices share their glyph memory. This is not | |
2655 | possible for current window matrices. Their glyphs are copied to | |
2656 | the desired frame matrix. The latter is equivalent to | |
2657 | preserve_other_columns in the old redisplay. | |
2658 | ||
2659 | Used glyphs counters for frame matrix rows are the result of adding | |
2660 | up glyph lengths of the window matrices. A line in the frame | |
2661 | matrix is enabled, if a corresponding line in a window matrix is | |
2662 | enabled. | |
177c0ea7 | 2663 | |
5f5c8ee5 GM |
2664 | After building the desired frame matrix, it will be passed to |
2665 | terminal code, which will manipulate both the desired and current | |
2666 | frame matrix. Changes applied to the frame's current matrix have | |
2667 | to be visible in current window matrices afterwards, of course. | |
2668 | ||
2669 | This problem is solved like this: | |
2670 | ||
2671 | 1. Window and frame matrices share glyphs. Window matrices are | |
2672 | constructed in a way that their glyph contents ARE the glyph | |
2673 | contents needed in a frame matrix. Thus, any modification of | |
2674 | glyphs done in terminal code will be reflected in window matrices | |
2675 | automatically. | |
177c0ea7 | 2676 | |
5f5c8ee5 GM |
2677 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2678 | intercepted by hook functions so that corresponding row operations | |
2679 | on window matrices can be performed. This is necessary because we | |
2680 | use pointers to glyphs in glyph row structures. To satisfy the | |
2681 | assumption of point 1 above that glyphs are updated implicitly in | |
2682 | window matrices when they are manipulated via the frame matrix, | |
2683 | window and frame matrix must of course agree where to find the | |
2684 | glyphs for their rows. Possible manipulations that must be | |
2685 | mirrored are assignments of rows of the desired frame matrix to the | |
2686 | current frame matrix and scrolling the current frame matrix. */ | |
2687 | ||
2688 | /* Build frame F's desired matrix from window matrices. Only windows | |
2689 | which have the flag must_be_updated_p set have to be updated. Menu | |
2690 | bar lines of a frame are not covered by window matrices, so make | |
2691 | sure not to touch them in this function. */ | |
2692 | ||
2693 | static void | |
2694 | build_frame_matrix (f) | |
2695 | struct frame *f; | |
2696 | { | |
2697 | int i; | |
2698 | ||
2699 | /* F must have a frame matrix when this function is called. */ | |
2700 | xassert (!FRAME_WINDOW_P (f)); | |
177c0ea7 | 2701 | |
5f5c8ee5 GM |
2702 | /* Clear all rows in the frame matrix covered by window matrices. |
2703 | Menu bar lines are not covered by windows. */ | |
2704 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2705 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2706 | ||
2707 | /* Build the matrix by walking the window tree. */ | |
2708 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2709 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2710 | } | |
2711 | ||
2712 | ||
2713 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2714 | matrices. W is the root of a window tree. */ | |
2715 | ||
2716 | static void | |
2717 | build_frame_matrix_from_window_tree (matrix, w) | |
2718 | struct glyph_matrix *matrix; | |
2719 | struct window *w; | |
2720 | { | |
2721 | while (w) | |
2722 | { | |
2723 | if (!NILP (w->hchild)) | |
2724 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->hchild)); | |
2725 | else if (!NILP (w->vchild)) | |
2726 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->vchild)); | |
2727 | else | |
2728 | build_frame_matrix_from_leaf_window (matrix, w); | |
2729 | ||
2730 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2731 | } | |
2732 | } | |
2733 | ||
2734 | ||
2735 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2736 | desired frame matrix built. W is a leaf window whose desired or | |
2737 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2738 | must_be_updated_p determines which matrix it contributes to | |
2739 | FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix | |
2740 | is added to FRAME_MATRIX, otherwise W's current matrix is added. | |
2741 | Adding a desired matrix means setting up used counters and such in | |
2742 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2743 | means copying glyphs. The latter case corresponds to | |
2744 | preserve_other_columns in the old redisplay. */ | |
2745 | ||
2746 | static void | |
2747 | build_frame_matrix_from_leaf_window (frame_matrix, w) | |
2748 | struct glyph_matrix *frame_matrix; | |
2749 | struct window *w; | |
2750 | { | |
2751 | struct glyph_matrix *window_matrix; | |
2752 | int window_y, frame_y; | |
2753 | /* If non-zero, a glyph to insert at the right border of W. */ | |
2754 | GLYPH right_border_glyph = 0; | |
2755 | ||
2756 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2757 | if (w->must_be_updated_p) | |
2758 | { | |
2759 | window_matrix = w->desired_matrix; | |
2760 | ||
2761 | /* Decide whether we want to add a vertical border glyph. */ | |
2762 | if (!WINDOW_RIGHTMOST_P (w)) | |
2763 | { | |
2764 | struct Lisp_Char_Table *dp = window_display_table (w); | |
b4e49aee MB |
2765 | |
2766 | right_border_glyph | |
2767 | = ((dp && INTEGERP (DISP_BORDER_GLYPH (dp))) | |
2768 | ? spec_glyph_lookup_face (w, XINT (DISP_BORDER_GLYPH (dp))) | |
2769 | : '|'); | |
2770 | ||
2771 | if (FAST_GLYPH_FACE (right_border_glyph) <= 0) | |
2772 | right_border_glyph | |
53abc3bf | 2773 | = FAST_MAKE_GLYPH (right_border_glyph, VERTICAL_BORDER_FACE_ID); |
5f5c8ee5 GM |
2774 | } |
2775 | } | |
2776 | else | |
2777 | window_matrix = w->current_matrix; | |
2778 | ||
2779 | /* For all rows in the window matrix and corresponding rows in the | |
2780 | frame matrix. */ | |
2781 | window_y = 0; | |
2782 | frame_y = window_matrix->matrix_y; | |
2783 | while (window_y < window_matrix->nrows) | |
2784 | { | |
2785 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2786 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
2a8bd25f | 2787 | int current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2788 | |
2789 | /* Fill up the frame row with spaces up to the left margin of the | |
2790 | window row. */ | |
2791 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2792 | ||
2793 | /* Fill up areas in the window matrix row with spaces. */ | |
2794 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2795 | |
2796 | /* If only part of W's desired matrix has been built, and | |
2797 | window_row wasn't displayed, use the corresponding current | |
2798 | row instead. */ | |
2799 | if (window_matrix == w->desired_matrix | |
2800 | && !window_row->enabled_p) | |
2801 | { | |
2802 | window_row = w->current_matrix->rows + window_y; | |
2803 | current_row_p = 1; | |
2804 | } | |
177c0ea7 | 2805 | |
2a8bd25f | 2806 | if (current_row_p) |
5f5c8ee5 | 2807 | { |
2a8bd25f | 2808 | /* Copy window row to frame row. */ |
5f5c8ee5 GM |
2809 | bcopy (window_row->glyphs[0], |
2810 | frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, | |
2811 | window_matrix->matrix_w * sizeof (struct glyph)); | |
2812 | } | |
2813 | else | |
2814 | { | |
2a8bd25f | 2815 | xassert (window_row->enabled_p); |
177c0ea7 | 2816 | |
2a8bd25f GM |
2817 | /* Only when a desired row has been displayed, we want |
2818 | the corresponding frame row to be updated. */ | |
2819 | frame_row->enabled_p = 1; | |
177c0ea7 | 2820 | |
5f5c8ee5 GM |
2821 | /* Maybe insert a vertical border between horizontally adjacent |
2822 | windows. */ | |
2823 | if (right_border_glyph) | |
2824 | { | |
2825 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2826 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2827 | } | |
2828 | ||
498c08ea | 2829 | #if GLYPH_DEBUG |
a13396c9 GM |
2830 | /* Window row window_y must be a slice of frame row |
2831 | frame_y. */ | |
5f5c8ee5 | 2832 | xassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2833 | |
5f5c8ee5 GM |
2834 | /* If rows are in sync, we don't have to copy glyphs because |
2835 | frame and window share glyphs. */ | |
177c0ea7 | 2836 | |
a38634ff | 2837 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2838 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2839 | #endif |
5f5c8ee5 GM |
2840 | } |
2841 | ||
2842 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2843 | up with spaces, and visit leaf windows from left to right it | |
2844 | can be done simply. */ | |
177c0ea7 | 2845 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2846 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2847 | ||
5f5c8ee5 GM |
2848 | /* Next row. */ |
2849 | ++window_y; | |
2850 | ++frame_y; | |
2851 | } | |
2852 | } | |
2853 | ||
5f81871e RS |
2854 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2855 | ID, return a glyph that has a realized face ID. | |
2856 | This is used for glyphs displayed specially and not part of the text; | |
2857 | for instance, vertical separators, truncation markers, etc. */ | |
2858 | ||
2859 | GLYPH | |
2860 | spec_glyph_lookup_face (w, glyph) | |
2861 | struct window *w; | |
2862 | GLYPH glyph; | |
2863 | { | |
2864 | int lface_id = FAST_GLYPH_FACE (glyph); | |
2865 | /* Convert the glyph's specified face to a realized (cache) face. */ | |
2866 | if (lface_id > 0) | |
2867 | { | |
2868 | int face_id = merge_faces (XFRAME (w->frame), | |
2869 | Qt, lface_id, DEFAULT_FACE_ID); | |
2870 | glyph | |
2871 | = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (glyph), face_id); | |
2872 | } | |
2873 | return glyph; | |
2874 | } | |
5f5c8ee5 GM |
2875 | |
2876 | /* Add spaces to a glyph row ROW in a window matrix. | |
2877 | ||
2878 | Each row has the form: | |
2879 | ||
2880 | +---------+-----------------------------+------------+ | |
2881 | | left | text | right | | |
2882 | +---------+-----------------------------+------------+ | |
2883 | ||
2884 | Left and right marginal areas are optional. This function adds | |
2885 | spaces to areas so that there are no empty holes between areas. | |
2886 | In other words: If the right area is not empty, the text area | |
2887 | is filled up with spaces up to the right area. If the text area | |
2888 | is not empty, the left area is filled up. | |
2889 | ||
2890 | To be called for frame-based redisplay, only. */ | |
2891 | ||
2892 | static void | |
2893 | fill_up_glyph_row_with_spaces (row) | |
2894 | struct glyph_row *row; | |
2895 | { | |
2896 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2897 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2898 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2899 | } | |
2900 | ||
2901 | ||
2902 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2903 | frame-based redisplay only. */ | |
2904 | ||
2905 | static void | |
2906 | fill_up_glyph_row_area_with_spaces (row, area) | |
2907 | struct glyph_row *row; | |
2908 | int area; | |
2909 | { | |
2910 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2911 | { | |
2912 | struct glyph *end = row->glyphs[area + 1]; | |
2913 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2914 | ||
2915 | while (text < end) | |
2916 | *text++ = space_glyph; | |
2917 | row->used[area] = text - row->glyphs[area]; | |
2918 | } | |
2919 | } | |
2920 | ||
2921 | ||
2922 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2923 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2924 | ||
2925 | static void | |
2926 | fill_up_frame_row_with_spaces (row, upto) | |
2927 | struct glyph_row *row; | |
2928 | int upto; | |
2929 | { | |
2930 | int i = row->used[TEXT_AREA]; | |
2931 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2932 | |
5f5c8ee5 GM |
2933 | while (i < upto) |
2934 | glyph[i++] = space_glyph; | |
2935 | ||
2936 | row->used[TEXT_AREA] = i; | |
2937 | } | |
2938 | ||
2939 | ||
2940 | \f | |
2941 | /********************************************************************** | |
2942 | Mirroring operations on frame matrices in window matrices | |
2943 | **********************************************************************/ | |
2944 | ||
2945 | /* Set frame being updated via frame-based redisplay to F. This | |
2946 | function must be called before updates to make explicit that we are | |
2947 | working on frame matrices or not. */ | |
2948 | ||
2949 | static INLINE void | |
2950 | set_frame_matrix_frame (f) | |
2951 | struct frame *f; | |
2952 | { | |
2953 | frame_matrix_frame = f; | |
2954 | } | |
2955 | ||
2956 | ||
2957 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2958 | DESIRED_MATRIX is the desired matrix corresponding to | |
2959 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2960 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2961 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2962 | done in frame matrices, and that we have to perform analogous | |
2963 | operations in window matrices of frame_matrix_frame. */ | |
2964 | ||
2965 | static INLINE void | |
2966 | make_current (desired_matrix, current_matrix, row) | |
2967 | struct glyph_matrix *desired_matrix, *current_matrix; | |
2968 | int row; | |
2969 | { | |
2970 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2971 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
e876ff42 | 2972 | int mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2973 | |
2974 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2975 | between both rows, and does a structure assignment otherwise. */ | |
2976 | assign_row (current_row, desired_row); | |
2977 | ||
2978 | /* Enable current_row to mark it as valid. */ | |
2979 | current_row->enabled_p = 1; | |
e876ff42 | 2980 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2981 | |
2982 | /* If we are called on frame matrices, perform analogous operations | |
2983 | for window matrices. */ | |
2984 | if (frame_matrix_frame) | |
2985 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); | |
2986 | } | |
2987 | ||
2988 | ||
2989 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2990 | W's frame which has been made current (by swapping pointers between | |
2991 | current and desired matrix). Perform analogous operations in the | |
2992 | matrices of leaf windows in the window tree rooted at W. */ | |
2993 | ||
2994 | static void | |
2995 | mirror_make_current (w, frame_row) | |
2996 | struct window *w; | |
2997 | int frame_row; | |
2998 | { | |
2999 | while (w) | |
3000 | { | |
3001 | if (!NILP (w->hchild)) | |
3002 | mirror_make_current (XWINDOW (w->hchild), frame_row); | |
3003 | else if (!NILP (w->vchild)) | |
3004 | mirror_make_current (XWINDOW (w->vchild), frame_row); | |
3005 | else | |
3006 | { | |
3007 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
3008 | here because the checks performed in debug mode there | |
3009 | will not allow the conversion. */ | |
3010 | int row = frame_row - w->desired_matrix->matrix_y; | |
3011 | ||
3012 | /* If FRAME_ROW is within W, assign the desired row to the | |
3013 | current row (exchanging glyph pointers). */ | |
3014 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
3015 | { | |
3016 | struct glyph_row *current_row | |
3017 | = MATRIX_ROW (w->current_matrix, row); | |
3018 | struct glyph_row *desired_row | |
3019 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
3020 | |
3021 | if (desired_row->enabled_p) | |
3022 | assign_row (current_row, desired_row); | |
3023 | else | |
3024 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 GM |
3025 | current_row->enabled_p = 1; |
3026 | } | |
3027 | } | |
177c0ea7 | 3028 | |
5f5c8ee5 GM |
3029 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3030 | } | |
3031 | } | |
3032 | ||
3033 | ||
3034 | /* Perform row dance after scrolling. We are working on the range of | |
3035 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
3036 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
3037 | row I in the range 0 <= I < NLINES, the index of the original line | |
3038 | to move to I. This index is relative to the row range, i.e. 0 <= | |
3039 | index < NLINES. RETAINED_P is a vector containing zero for each | |
3040 | row 0 <= I < NLINES which is empty. | |
3041 | ||
3042 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 3043 | |
5f5c8ee5 GM |
3044 | void |
3045 | mirrored_line_dance (matrix, unchanged_at_top, nlines, copy_from, | |
3046 | retained_p) | |
3047 | struct glyph_matrix *matrix; | |
3048 | int unchanged_at_top, nlines; | |
3049 | int *copy_from; | |
3050 | char *retained_p; | |
3051 | { | |
3052 | /* A copy of original rows. */ | |
3053 | struct glyph_row *old_rows; | |
3054 | ||
3055 | /* Rows to assign to. */ | |
3056 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 3057 | |
5f5c8ee5 GM |
3058 | int i; |
3059 | ||
3060 | /* Make a copy of the original rows. */ | |
3061 | old_rows = (struct glyph_row *) alloca (nlines * sizeof *old_rows); | |
3062 | bcopy (new_rows, old_rows, nlines * sizeof *old_rows); | |
3063 | ||
3064 | /* Assign new rows, maybe clear lines. */ | |
3065 | for (i = 0; i < nlines; ++i) | |
3066 | { | |
3067 | int enabled_before_p = new_rows[i].enabled_p; | |
3068 | ||
3069 | xassert (i + unchanged_at_top < matrix->nrows); | |
3070 | xassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
3071 | new_rows[i] = old_rows[copy_from[i]]; | |
3072 | new_rows[i].enabled_p = enabled_before_p; | |
3073 | ||
3074 | /* RETAINED_P is zero for empty lines. */ | |
3075 | if (!retained_p[copy_from[i]]) | |
3076 | new_rows[i].enabled_p = 0; | |
3077 | } | |
3078 | ||
153a073c | 3079 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 GM |
3080 | if (frame_matrix_frame) |
3081 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), | |
3082 | unchanged_at_top, nlines, copy_from, retained_p); | |
3083 | } | |
3084 | ||
3085 | ||
a13396c9 | 3086 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 3087 | the current frame matrix. */ |
a13396c9 GM |
3088 | |
3089 | static void | |
3090 | sync_window_with_frame_matrix_rows (w) | |
3091 | struct window *w; | |
3092 | { | |
3093 | struct frame *f = XFRAME (w->frame); | |
3094 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
075c507b | 3095 | int left, right, x, width; |
a13396c9 | 3096 | |
5cb88111 | 3097 | /* Preconditions: W must be a leaf window on a tty frame. */ |
a13396c9 | 3098 | xassert (NILP (w->hchild) && NILP (w->vchild)); |
a13396c9 GM |
3099 | xassert (!FRAME_WINDOW_P (f)); |
3100 | ||
7df02016 KS |
3101 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
3102 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
3103 | x = w->current_matrix->matrix_x; |
3104 | width = w->current_matrix->matrix_w; | |
3105 | ||
a13396c9 GM |
3106 | window_row = w->current_matrix->rows; |
3107 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 3108 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 3109 | |
5cb88111 | 3110 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 3111 | { |
5cb88111 GM |
3112 | window_row->glyphs[LEFT_MARGIN_AREA] |
3113 | = frame_row->glyphs[0] + x; | |
3114 | window_row->glyphs[TEXT_AREA] | |
3115 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
3116 | window_row->glyphs[LAST_AREA] | |
3117 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
3118 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
3119 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
3120 | } |
3121 | } | |
3122 | ||
3123 | ||
3124 | /* Return the window in the window tree rooted in W containing frame | |
3125 | row ROW. Value is null if none is found. */ | |
3126 | ||
3127 | struct window * | |
3128 | frame_row_to_window (w, row) | |
3129 | struct window *w; | |
3130 | int row; | |
3131 | { | |
3132 | struct window *found = NULL; | |
177c0ea7 | 3133 | |
a13396c9 GM |
3134 | while (w && !found) |
3135 | { | |
3136 | if (!NILP (w->hchild)) | |
3137 | found = frame_row_to_window (XWINDOW (w->hchild), row); | |
3138 | else if (!NILP (w->vchild)) | |
3139 | found = frame_row_to_window (XWINDOW (w->vchild), row); | |
7df02016 KS |
3140 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
3141 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 3142 | found = w; |
177c0ea7 | 3143 | |
a13396c9 GM |
3144 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3145 | } | |
3146 | ||
3147 | return found; | |
3148 | } | |
3149 | ||
3150 | ||
5f5c8ee5 GM |
3151 | /* Perform a line dance in the window tree rooted at W, after |
3152 | scrolling a frame matrix in mirrored_line_dance. | |
3153 | ||
3154 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
3155 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
3156 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
3157 | I < NLINES, the index of the original line to move to I. This | |
3158 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
3159 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
3160 | which is empty. */ | |
3161 | ||
3162 | static void | |
3163 | mirror_line_dance (w, unchanged_at_top, nlines, copy_from, retained_p) | |
3164 | struct window *w; | |
3165 | int unchanged_at_top, nlines; | |
3166 | int *copy_from; | |
3167 | char *retained_p; | |
3168 | { | |
3169 | while (w) | |
3170 | { | |
3171 | if (!NILP (w->hchild)) | |
3172 | mirror_line_dance (XWINDOW (w->hchild), unchanged_at_top, | |
3173 | nlines, copy_from, retained_p); | |
3174 | else if (!NILP (w->vchild)) | |
3175 | mirror_line_dance (XWINDOW (w->vchild), unchanged_at_top, | |
3176 | nlines, copy_from, retained_p); | |
3177 | else | |
3178 | { | |
3179 | /* W is a leaf window, and we are working on its current | |
3180 | matrix m. */ | |
3181 | struct glyph_matrix *m = w->current_matrix; | |
a13396c9 | 3182 | int i, sync_p = 0; |
5f5c8ee5 GM |
3183 | struct glyph_row *old_rows; |
3184 | ||
3185 | /* Make a copy of the original rows of matrix m. */ | |
3186 | old_rows = (struct glyph_row *) alloca (m->nrows * sizeof *old_rows); | |
3187 | bcopy (m->rows, old_rows, m->nrows * sizeof *old_rows); | |
3188 | ||
3189 | for (i = 0; i < nlines; ++i) | |
3190 | { | |
3191 | /* Frame relative line assigned to. */ | |
3192 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 3193 | |
5f5c8ee5 GM |
3194 | /* Frame relative line assigned. */ |
3195 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 3196 | |
5f5c8ee5 GM |
3197 | /* Window relative line assigned to. */ |
3198 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 3199 | |
5f5c8ee5 GM |
3200 | /* Window relative line assigned. */ |
3201 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 3202 | |
5f5c8ee5 GM |
3203 | /* Is assigned line inside window? */ |
3204 | int from_inside_window_p | |
3205 | = window_from >= 0 && window_from < m->matrix_h; | |
177c0ea7 | 3206 | |
a13396c9 GM |
3207 | /* Is assigned to line inside window? */ |
3208 | int to_inside_window_p | |
3209 | = window_to >= 0 && window_to < m->matrix_h; | |
177c0ea7 | 3210 | |
a13396c9 | 3211 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 3212 | { |
5f5c8ee5 GM |
3213 | /* Enabled setting before assignment. */ |
3214 | int enabled_before_p; | |
177c0ea7 | 3215 | |
5f5c8ee5 GM |
3216 | /* Do the assignment. The enabled_p flag is saved |
3217 | over the assignment because the old redisplay did | |
3218 | that. */ | |
3219 | enabled_before_p = m->rows[window_to].enabled_p; | |
3220 | m->rows[window_to] = old_rows[window_from]; | |
3221 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 3222 | |
5f5c8ee5 GM |
3223 | /* If frame line is empty, window line is empty, too. */ |
3224 | if (!retained_p[copy_from[i]]) | |
3225 | m->rows[window_to].enabled_p = 0; | |
3226 | } | |
a13396c9 GM |
3227 | else if (to_inside_window_p) |
3228 | { | |
3229 | /* A copy between windows. This is an infrequent | |
3230 | case not worth optimizing. */ | |
3231 | struct frame *f = XFRAME (w->frame); | |
3232 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); | |
3233 | struct window *w2; | |
3234 | struct glyph_matrix *m2; | |
3235 | int m2_from; | |
3236 | ||
fe8b8401 | 3237 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
3238 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
3239 | -nw', FROM_FRAME sometimes has no associated window. | |
3240 | This check avoids a segfault if W2 is null. */ | |
3241 | if (w2) | |
3242 | { | |
3243 | m2 = w2->current_matrix; | |
3244 | m2_from = frame_from - m2->matrix_y; | |
3245 | copy_row_except_pointers (m->rows + window_to, | |
3246 | m2->rows + m2_from); | |
3247 | ||
3248 | /* If frame line is empty, window line is empty, too. */ | |
3249 | if (!retained_p[copy_from[i]]) | |
3250 | m->rows[window_to].enabled_p = 0; | |
3251 | } | |
a13396c9 GM |
3252 | sync_p = 1; |
3253 | } | |
3254 | else if (from_inside_window_p) | |
3255 | sync_p = 1; | |
5f5c8ee5 | 3256 | } |
a13396c9 GM |
3257 | |
3258 | /* If there was a copy between windows, make sure glyph | |
3259 | pointers are in sync with the frame matrix. */ | |
3260 | if (sync_p) | |
3261 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 3262 | |
5f5c8ee5 GM |
3263 | /* Check that no pointers are lost. */ |
3264 | CHECK_MATRIX (m); | |
3265 | } | |
3266 | ||
3267 | /* Next window on same level. */ | |
3268 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3269 | } | |
3270 | } | |
3271 | ||
3272 | ||
3273 | #if GLYPH_DEBUG | |
3274 | ||
3275 | /* Check that window and frame matrices agree about their | |
3276 | understanding where glyphs of the rows are to find. For each | |
3277 | window in the window tree rooted at W, check that rows in the | |
3278 | matrices of leaf window agree with their frame matrices about | |
3279 | glyph pointers. */ | |
3280 | ||
3281 | void | |
3282 | check_window_matrix_pointers (w) | |
3283 | struct window *w; | |
3284 | { | |
3285 | while (w) | |
3286 | { | |
3287 | if (!NILP (w->hchild)) | |
3288 | check_window_matrix_pointers (XWINDOW (w->hchild)); | |
3289 | else if (!NILP (w->vchild)) | |
3290 | check_window_matrix_pointers (XWINDOW (w->vchild)); | |
3291 | else | |
60a8948a | 3292 | { |
5f5c8ee5 GM |
3293 | struct frame *f = XFRAME (w->frame); |
3294 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); | |
3295 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 3296 | } |
177c0ea7 | 3297 | |
5f5c8ee5 GM |
3298 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3299 | } | |
3300 | } | |
3301 | ||
3302 | ||
3303 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
3304 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
3305 | each row in WINDOW_MATRIX check that it's a slice of the | |
3306 | corresponding frame row. If it isn't, abort. */ | |
3307 | ||
3308 | static void | |
3309 | check_matrix_pointers (window_matrix, frame_matrix) | |
3310 | struct glyph_matrix *window_matrix, *frame_matrix; | |
3311 | { | |
3312 | /* Row number in WINDOW_MATRIX. */ | |
3313 | int i = 0; | |
3314 | ||
3315 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
3316 | int j = window_matrix->matrix_y; | |
3317 | ||
177c0ea7 | 3318 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
3319 | slice of the row in the frame matrix. If it isn't we didn't |
3320 | mirror an operation on the frame matrix correctly. */ | |
3321 | while (i < window_matrix->nrows) | |
3322 | { | |
3323 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
3324 | frame_matrix->rows + j)) | |
3325 | abort (); | |
3326 | ++i, ++j; | |
3327 | } | |
3328 | } | |
3329 | ||
3330 | #endif /* GLYPH_DEBUG != 0 */ | |
3331 | ||
3332 | ||
3333 | \f | |
3334 | /********************************************************************** | |
3335 | VPOS and HPOS translations | |
3336 | **********************************************************************/ | |
3337 | ||
3338 | #if GLYPH_DEBUG | |
3339 | ||
3340 | /* Translate vertical position VPOS which is relative to window W to a | |
3341 | vertical position relative to W's frame. */ | |
3342 | ||
3343 | static int | |
3344 | window_to_frame_vpos (w, vpos) | |
3345 | struct window *w; | |
3346 | int vpos; | |
3347 | { | |
3348 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 3349 | |
5f5c8ee5 GM |
3350 | xassert (!FRAME_WINDOW_P (f)); |
3351 | xassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); | |
7df02016 KS |
3352 | vpos += WINDOW_TOP_EDGE_LINE (w); |
3353 | xassert (vpos >= 0 && vpos <= FRAME_LINES (f)); | |
5f5c8ee5 GM |
3354 | return vpos; |
3355 | } | |
3356 | ||
3357 | ||
3358 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 3359 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
3360 | |
3361 | static int | |
3362 | window_to_frame_hpos (w, hpos) | |
3363 | struct window *w; | |
3364 | int hpos; | |
3365 | { | |
82f4a138 | 3366 | xassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 3367 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
3368 | return hpos; |
3369 | } | |
177c0ea7 | 3370 | |
5f5c8ee5 GM |
3371 | #endif /* GLYPH_DEBUG */ |
3372 | ||
3373 | ||
3374 | \f | |
3375 | /********************************************************************** | |
3376 | Redrawing Frames | |
3377 | **********************************************************************/ | |
3378 | ||
3379 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, | |
7ee72033 MB |
3380 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. */) |
3381 | (frame) | |
5f5c8ee5 GM |
3382 | Lisp_Object frame; |
3383 | { | |
3384 | struct frame *f; | |
3385 | ||
b7826503 | 3386 | CHECK_LIVE_FRAME (frame); |
5f5c8ee5 GM |
3387 | f = XFRAME (frame); |
3388 | ||
3389 | /* Ignore redraw requests, if frame has no glyphs yet. | |
3390 | (Implementation note: It still has to be checked why we are | |
3391 | called so early here). */ | |
3392 | if (!glyphs_initialized_initially_p) | |
3393 | return Qnil; | |
3394 | ||
3395 | update_begin (f); | |
f2adda5e | 3396 | if (FRAME_MSDOS_P (f)) |
5f5c8ee5 GM |
3397 | set_terminal_modes (); |
3398 | clear_frame (); | |
3399 | clear_current_matrices (f); | |
3400 | update_end (f); | |
3401 | fflush (stdout); | |
3402 | windows_or_buffers_changed++; | |
3403 | /* Mark all windows as inaccurate, so that every window will have | |
3404 | its redisplay done. */ | |
3405 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
3406 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
3407 | f->garbaged = 0; | |
3408 | return Qnil; | |
3409 | } | |
3410 | ||
3411 | ||
3412 | /* Redraw frame F. This is nothing more than a call to the Lisp | |
3413 | function redraw-frame. */ | |
3414 | ||
3415 | void | |
3416 | redraw_frame (f) | |
3417 | struct frame *f; | |
3418 | { | |
3419 | Lisp_Object frame; | |
3420 | XSETFRAME (frame, f); | |
3421 | Fredraw_frame (frame); | |
3422 | } | |
3423 | ||
3424 | ||
3425 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
7ee72033 MB |
3426 | doc: /* Clear and redisplay all visible frames. */) |
3427 | () | |
5f5c8ee5 GM |
3428 | { |
3429 | Lisp_Object tail, frame; | |
3430 | ||
3431 | FOR_EACH_FRAME (tail, frame) | |
3432 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
3433 | Fredraw_frame (frame); | |
3434 | ||
3435 | return Qnil; | |
3436 | } | |
3437 | ||
3438 | ||
3439 | /* This is used when frame_garbaged is set. Call Fredraw_frame on all | |
3440 | visible frames marked as garbaged. */ | |
3441 | ||
3442 | void | |
3443 | redraw_garbaged_frames () | |
3444 | { | |
3445 | Lisp_Object tail, frame; | |
3446 | ||
3447 | FOR_EACH_FRAME (tail, frame) | |
3448 | if (FRAME_VISIBLE_P (XFRAME (frame)) | |
3449 | && FRAME_GARBAGED_P (XFRAME (frame))) | |
3450 | Fredraw_frame (frame); | |
3451 | } | |
3452 | ||
3453 | ||
3454 | \f | |
3455 | /*********************************************************************** | |
3456 | Direct Operations | |
3457 | ***********************************************************************/ | |
3458 | ||
3459 | /* Try to update display and current glyph matrix directly. | |
3460 | ||
3461 | This function is called after a character G has been inserted into | |
3462 | current_buffer. It tries to update the current glyph matrix and | |
3463 | perform appropriate screen output to reflect the insertion. If it | |
3464 | succeeds, the global flag redisplay_performed_directly_p will be | |
3465 | set to 1, and thereby prevent the more costly general redisplay | |
3466 | from running (see redisplay_internal). | |
3467 | ||
3468 | This function is not called for `hairy' character insertions. | |
3469 | In particular, it is not called when after or before change | |
3470 | functions exist, like they are used by font-lock. See keyboard.c | |
3471 | for details where this function is called. */ | |
3472 | ||
3473 | int | |
3474 | direct_output_for_insert (g) | |
3475 | int g; | |
3476 | { | |
91fb7e1b | 3477 | register struct frame *f = SELECTED_FRAME (); |
5f5c8ee5 GM |
3478 | struct window *w = XWINDOW (selected_window); |
3479 | struct it it, it2; | |
3480 | struct glyph_row *glyph_row; | |
3481 | struct glyph *glyphs, *glyph, *end; | |
3482 | int n; | |
153a073c | 3483 | /* Non-null means that redisplay of W is based on window matrices. */ |
5f5c8ee5 GM |
3484 | int window_redisplay_p = FRAME_WINDOW_P (f); |
3485 | /* Non-null means we are in overwrite mode. */ | |
3486 | int overwrite_p = !NILP (current_buffer->overwrite_mode); | |
3487 | int added_width; | |
3488 | struct text_pos pos; | |
3489 | int delta, delta_bytes; | |
3490 | ||
3491 | /* Not done directly. */ | |
3492 | redisplay_performed_directly_p = 0; | |
3493 | ||
3494 | /* Quickly give up for some common cases. */ | |
3495 | if (cursor_in_echo_area | |
3496 | /* Give up if fonts have changed. */ | |
3497 | || fonts_changed_p | |
3498 | /* Give up if face attributes have been changed. */ | |
3499 | || face_change_count | |
3500 | /* Give up if cursor position not really known. */ | |
3501 | || !display_completed | |
3502 | /* Give up if buffer appears in two places. */ | |
3503 | || buffer_shared > 1 | |
c74e645b GM |
3504 | /* Give up if currently displaying a message instead of the |
3505 | minibuffer contents. */ | |
3506 | || (EQ (selected_window, minibuf_window) | |
3507 | && EQ (minibuf_window, echo_area_window)) | |
5f5c8ee5 GM |
3508 | /* Give up for hscrolled mini-buffer because display of the prompt |
3509 | is handled specially there (see display_line). */ | |
3510 | || (MINI_WINDOW_P (w) && XFASTINT (w->hscroll)) | |
3511 | /* Give up if overwriting in the middle of a line. */ | |
177c0ea7 JB |
3512 | || (overwrite_p |
3513 | && PT != ZV | |
5f5c8ee5 GM |
3514 | && FETCH_BYTE (PT) != '\n') |
3515 | /* Give up for tabs and line ends. */ | |
3516 | || g == '\t' | |
3517 | || g == '\n' | |
3518 | || g == '\r' | |
3519 | /* Give up if unable to display the cursor in the window. */ | |
3520 | || w->cursor.vpos < 0 | |
c224f70b GM |
3521 | /* Give up if we are showing a message or just cleared the message |
3522 | because we might need to resize the echo area window. */ | |
3523 | || !NILP (echo_area_buffer[0]) | |
3524 | || !NILP (echo_area_buffer[1]) | |
408f5064 GM |
3525 | || (glyph_row = MATRIX_ROW (w->current_matrix, w->cursor.vpos), |
3526 | /* Can't do it in a continued line because continuation | |
3527 | lines would change. */ | |
3528 | (glyph_row->continued_p | |
60e99293 | 3529 | || glyph_row->exact_window_width_line_p |
408f5064 GM |
3530 | /* Can't use this method if the line overlaps others or is |
3531 | overlapped by others because these other lines would | |
3532 | have to be redisplayed. */ | |
3533 | || glyph_row->overlapping_p | |
3534 | || glyph_row->overlapped_p)) | |
5f5c8ee5 GM |
3535 | /* Can't do it for partial width windows on terminal frames |
3536 | because we can't clear to eol in such a window. */ | |
3537 | || (!window_redisplay_p && !WINDOW_FULL_WIDTH_P (w))) | |
3538 | return 0; | |
3539 | ||
f3ffc2c3 GM |
3540 | /* If we can't insert glyphs, we can use this method only |
3541 | at the end of a line. */ | |
3542 | if (!char_ins_del_ok) | |
3543 | if (PT != ZV && FETCH_BYTE (PT_BYTE) != '\n') | |
3544 | return 0; | |
3545 | ||
5f5c8ee5 GM |
3546 | /* Set up a display iterator structure for W. Glyphs will be |
3547 | produced in scratch_glyph_row. Current position is W's cursor | |
3548 | position. */ | |
3549 | clear_glyph_row (&scratch_glyph_row); | |
3550 | SET_TEXT_POS (pos, PT, PT_BYTE); | |
5f15d712 | 3551 | DEC_TEXT_POS (pos, !NILP (current_buffer->enable_multibyte_characters)); |
5f5c8ee5 GM |
3552 | init_iterator (&it, w, CHARPOS (pos), BYTEPOS (pos), &scratch_glyph_row, |
3553 | DEFAULT_FACE_ID); | |
3554 | ||
3555 | glyph_row = MATRIX_ROW (w->current_matrix, w->cursor.vpos); | |
e876ff42 GM |
3556 | if (glyph_row->mouse_face_p) |
3557 | return 0; | |
177c0ea7 | 3558 | |
5f5c8ee5 GM |
3559 | /* Give up if highlighting trailing whitespace and we have trailing |
3560 | whitespace in glyph_row. We would have to remove the trailing | |
3561 | whitespace face in that case. */ | |
f1f13490 | 3562 | if (!NILP (Vshow_trailing_whitespace) |
5f5c8ee5 GM |
3563 | && glyph_row->used[TEXT_AREA]) |
3564 | { | |
3565 | struct glyph *last; | |
3566 | ||
3567 | last = glyph_row->glyphs[TEXT_AREA] + glyph_row->used[TEXT_AREA] - 1; | |
3568 | if (last->type == STRETCH_GLYPH | |
3569 | || (last->type == CHAR_GLYPH | |
42186983 | 3570 | && last->u.ch == ' ')) |
5f5c8ee5 GM |
3571 | return 0; |
3572 | } | |
3573 | ||
3574 | /* Give up if there are overlay strings at pos. This would fail | |
3575 | if the overlay string has newlines in it. */ | |
3576 | if (STRINGP (it.string)) | |
3577 | return 0; | |
177c0ea7 | 3578 | |
5f5c8ee5 GM |
3579 | it.hpos = w->cursor.hpos; |
3580 | it.vpos = w->cursor.vpos; | |
3581 | it.current_x = w->cursor.x + it.first_visible_x; | |
3582 | it.current_y = w->cursor.y; | |
3583 | it.end_charpos = PT; | |
3584 | it.stop_charpos = min (PT, it.stop_charpos); | |
ae76d741 | 3585 | it.stop_charpos = max (IT_CHARPOS (it), it.stop_charpos); |
5f5c8ee5 GM |
3586 | |
3587 | /* More than one display element may be returned for PT - 1 if | |
3588 | (i) it's a control character which is translated into `\003' or | |
177c0ea7 | 3589 | `^C', or (ii) it has a display table entry, or (iii) it's a |
5f5c8ee5 GM |
3590 | combination of both. */ |
3591 | delta = delta_bytes = 0; | |
3592 | while (get_next_display_element (&it)) | |
3593 | { | |
3594 | PRODUCE_GLYPHS (&it); | |
3595 | ||
3596 | /* Give up if glyph doesn't fit completely on the line. */ | |
3597 | if (it.current_x >= it.last_visible_x) | |
3598 | return 0; | |
3599 | ||
3600 | /* Give up if new glyph has different ascent or descent than | |
3601 | the original row, or if it is not a character glyph. */ | |
3602 | if (glyph_row->ascent != it.ascent | |
3603 | || glyph_row->height != it.ascent + it.descent | |
408f5064 GM |
3604 | || glyph_row->phys_ascent != it.phys_ascent |
3605 | || glyph_row->phys_height != it.phys_ascent + it.phys_descent | |
5f5c8ee5 GM |
3606 | || it.what != IT_CHARACTER) |
3607 | return 0; | |
3608 | ||
3609 | delta += 1; | |
3610 | delta_bytes += it.len; | |
a2e2a7f6 | 3611 | set_iterator_to_next (&it, 1); |
5f5c8ee5 GM |
3612 | } |
3613 | ||
3614 | /* Give up if we hit the right edge of the window. We would have | |
3615 | to insert truncation or continuation glyphs. */ | |
3616 | added_width = it.current_x - (w->cursor.x + it.first_visible_x); | |
3617 | if (glyph_row->pixel_width + added_width >= it.last_visible_x) | |
3618 | return 0; | |
3619 | ||
3620 | /* Give up if there is a \t following in the line. */ | |
3621 | it2 = it; | |
3622 | it2.end_charpos = ZV; | |
3623 | it2.stop_charpos = min (it2.stop_charpos, ZV); | |
3624 | while (get_next_display_element (&it2) | |
3625 | && !ITERATOR_AT_END_OF_LINE_P (&it2)) | |
3626 | { | |
3627 | if (it2.c == '\t') | |
3628 | return 0; | |
a2e2a7f6 | 3629 | set_iterator_to_next (&it2, 1); |
5f5c8ee5 GM |
3630 | } |
3631 | ||
3632 | /* Number of new glyphs produced. */ | |
3633 | n = it.glyph_row->used[TEXT_AREA]; | |
3634 | ||
3635 | /* Start and end of glyphs in original row. */ | |
3636 | glyphs = glyph_row->glyphs[TEXT_AREA] + w->cursor.hpos; | |
3637 | end = glyph_row->glyphs[1 + TEXT_AREA]; | |
60a8948a | 3638 | |
5f5c8ee5 GM |
3639 | /* Make room for new glyphs, then insert them. */ |
3640 | xassert (end - glyphs - n >= 0); | |
700fb05a GM |
3641 | safe_bcopy ((char *) glyphs, (char *) (glyphs + n), |
3642 | (end - glyphs - n) * sizeof (*end)); | |
5f5c8ee5 GM |
3643 | bcopy (it.glyph_row->glyphs[TEXT_AREA], glyphs, n * sizeof *glyphs); |
3644 | glyph_row->used[TEXT_AREA] = min (glyph_row->used[TEXT_AREA] + n, | |
3645 | end - glyph_row->glyphs[TEXT_AREA]); | |
177c0ea7 | 3646 | |
5f5c8ee5 GM |
3647 | /* Compute new line width. */ |
3648 | glyph = glyph_row->glyphs[TEXT_AREA]; | |
3649 | end = glyph + glyph_row->used[TEXT_AREA]; | |
3650 | glyph_row->pixel_width = glyph_row->x; | |
3651 | while (glyph < end) | |
3652 | { | |
3653 | glyph_row->pixel_width += glyph->pixel_width; | |
3654 | ++glyph; | |
3655 | } | |
3656 | ||
177c0ea7 | 3657 | /* Increment buffer positions for glyphs following the newly |
5f5c8ee5 GM |
3658 | inserted ones. */ |
3659 | for (glyph = glyphs + n; glyph < end; ++glyph) | |
f2fa858f | 3660 | if (glyph->charpos > 0 && BUFFERP (glyph->object)) |
5f5c8ee5 | 3661 | glyph->charpos += delta; |
177c0ea7 | 3662 | |
5f5c8ee5 GM |
3663 | if (MATRIX_ROW_END_CHARPOS (glyph_row) > 0) |
3664 | { | |
3665 | MATRIX_ROW_END_CHARPOS (glyph_row) += delta; | |
3666 | MATRIX_ROW_END_BYTEPOS (glyph_row) += delta_bytes; | |
3667 | } | |
177c0ea7 | 3668 | |
5f5c8ee5 | 3669 | /* Adjust positions in lines following the one we are in. */ |
86c11ba1 GM |
3670 | increment_matrix_positions (w->current_matrix, |
3671 | w->cursor.vpos + 1, | |
3672 | w->current_matrix->nrows, | |
3673 | delta, delta_bytes); | |
5f5c8ee5 GM |
3674 | |
3675 | glyph_row->contains_overlapping_glyphs_p | |
3676 | |= it.glyph_row->contains_overlapping_glyphs_p; | |
3677 | ||
975c6226 GM |
3678 | glyph_row->displays_text_p = 1; |
3679 | w->window_end_vpos = make_number (max (w->cursor.vpos, | |
3680 | XFASTINT (w->window_end_vpos))); | |
3681 | ||
f1f13490 | 3682 | if (!NILP (Vshow_trailing_whitespace)) |
5f5c8ee5 GM |
3683 | highlight_trailing_whitespace (it.f, glyph_row); |
3684 | ||
3685 | /* Write glyphs. If at end of row, we can simply call write_glyphs. | |
3686 | In the middle, we have to insert glyphs. Note that this is now | |
3687 | implemented for X frames. The implementation uses updated_window | |
3688 | and updated_row. */ | |
3689 | updated_row = glyph_row; | |
9d126815 | 3690 | updated_area = TEXT_AREA; |
5f5c8ee5 GM |
3691 | update_begin (f); |
3692 | if (rif) | |
3693 | { | |
3694 | rif->update_window_begin_hook (w); | |
177c0ea7 | 3695 | |
7728f17b GM |
3696 | if (glyphs == end - n |
3697 | /* In front of a space added by append_space. */ | |
3698 | || (glyphs == end - n - 1 | |
3699 | && (end - n)->charpos <= 0)) | |
5f5c8ee5 GM |
3700 | rif->write_glyphs (glyphs, n); |
3701 | else | |
3702 | rif->insert_glyphs (glyphs, n); | |
3703 | } | |
3704 | else | |
3705 | { | |
3706 | if (glyphs == end - n) | |
3707 | write_glyphs (glyphs, n); | |
3708 | else | |
3709 | insert_glyphs (glyphs, n); | |
3710 | } | |
4588ec20 | 3711 | |
5f5c8ee5 GM |
3712 | w->cursor.hpos += n; |
3713 | w->cursor.x = it.current_x - it.first_visible_x; | |
3714 | xassert (w->cursor.hpos >= 0 | |
3715 | && w->cursor.hpos < w->desired_matrix->matrix_w); | |
3716 | ||
3717 | /* How to set the cursor differs depending on whether we are | |
3718 | using a frame matrix or a window matrix. Note that when | |
3719 | a frame matrix is used, cursor_to expects frame coordinates, | |
3720 | and the X and Y parameters are not used. */ | |
3721 | if (window_redisplay_p) | |
3722 | rif->cursor_to (w->cursor.vpos, w->cursor.hpos, | |
3723 | w->cursor.y, w->cursor.x); | |
3724 | else | |
3725 | { | |
3726 | int x, y; | |
3727 | x = (WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos) | |
7df02016 KS |
3728 | + (INTEGERP (w->left_margin_cols) |
3729 | ? XFASTINT (w->left_margin_cols) | |
5f5c8ee5 GM |
3730 | : 0)); |
3731 | y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
3732 | cursor_to (y, x); | |
3733 | } | |
4588ec20 | 3734 | |
7af0e8d7 | 3735 | #ifdef HAVE_WINDOW_SYSTEM |
60e99293 | 3736 | update_window_fringes (w, 0); |
7af0e8d7 | 3737 | #endif |
60e99293 | 3738 | |
5f5c8ee5 | 3739 | if (rif) |
e876ff42 | 3740 | rif->update_window_end_hook (w, 1, 0); |
5f5c8ee5 GM |
3741 | update_end (f); |
3742 | updated_row = NULL; | |
3743 | fflush (stdout); | |
4588ec20 | 3744 | |
5f5c8ee5 | 3745 | TRACE ((stderr, "direct output for insert\n")); |
fc5206ff | 3746 | mark_window_display_accurate (it.window, 1); |
5f5c8ee5 GM |
3747 | redisplay_performed_directly_p = 1; |
3748 | return 1; | |
3749 | } | |
448fd7c0 | 3750 | |
4588ec20 | 3751 | |
5f5c8ee5 GM |
3752 | /* Perform a direct display update for moving PT by N positions |
3753 | left or right. N < 0 means a movement backwards. This function | |
3754 | is currently only called for N == 1 or N == -1. */ | |
3755 | ||
3756 | int | |
3757 | direct_output_forward_char (n) | |
3758 | int n; | |
3759 | { | |
91fb7e1b | 3760 | struct frame *f = SELECTED_FRAME (); |
5f5c8ee5 GM |
3761 | struct window *w = XWINDOW (selected_window); |
3762 | struct glyph_row *row; | |
3763 | ||
959804a0 | 3764 | /* Give up if point moved out of or into a composition. */ |
7c752c80 | 3765 | if (check_point_in_composition (current_buffer, XINT (w->last_point), |
959804a0 KH |
3766 | current_buffer, PT)) |
3767 | return 0; | |
3768 | ||
5f5c8ee5 GM |
3769 | /* Give up if face attributes have been changed. */ |
3770 | if (face_change_count) | |
3771 | return 0; | |
177c0ea7 JB |
3772 | |
3773 | /* Give up if current matrix is not up to date or we are | |
5f5c8ee5 GM |
3774 | displaying a message. */ |
3775 | if (!display_completed || cursor_in_echo_area) | |
3776 | return 0; | |
3777 | ||
3778 | /* Give up if the buffer's direction is reversed. */ | |
3779 | if (!NILP (XBUFFER (w->buffer)->direction_reversed)) | |
3780 | return 0; | |
3781 | ||
3782 | /* Can't use direct output if highlighting a region. */ | |
3783 | if (!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active)) | |
3784 | return 0; | |
3785 | ||
f1f13490 GM |
3786 | /* Can't use direct output if highlighting trailing whitespace. */ |
3787 | if (!NILP (Vshow_trailing_whitespace)) | |
3788 | return 0; | |
3789 | ||
d2d2ddaf GM |
3790 | /* Give up if we are showing a message or just cleared the message |
3791 | because we might need to resize the echo area window. */ | |
3792 | if (!NILP (echo_area_buffer[0]) || !NILP (echo_area_buffer[1])) | |
3793 | return 0; | |
3794 | ||
e4e0bee9 GM |
3795 | /* Give up if currently displaying a message instead of the |
3796 | minibuffer contents. */ | |
3797 | if (XWINDOW (minibuf_window) == w | |
3798 | && EQ (minibuf_window, echo_area_window)) | |
3799 | return 0; | |
177c0ea7 | 3800 | |
d2d2ddaf GM |
3801 | /* Give up if we don't know where the cursor is. */ |
3802 | if (w->cursor.vpos < 0) | |
3803 | return 0; | |
3804 | ||
5f5c8ee5 GM |
3805 | row = MATRIX_ROW (w->current_matrix, w->cursor.vpos); |
3806 | ||
2a8bd25f | 3807 | /* Give up if PT is outside of the last known cursor row. */ |
9b784ab8 GM |
3808 | if (PT <= MATRIX_ROW_START_CHARPOS (row) |
3809 | || PT >= MATRIX_ROW_END_CHARPOS (row)) | |
5f5c8ee5 GM |
3810 | return 0; |
3811 | ||
3812 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
177c0ea7 | 3813 | |
5f5c8ee5 GM |
3814 | w->last_cursor = w->cursor; |
3815 | XSETFASTINT (w->last_point, PT); | |
3816 | ||
3817 | xassert (w->cursor.hpos >= 0 | |
3818 | && w->cursor.hpos < w->desired_matrix->matrix_w); | |
177c0ea7 | 3819 | |
5f5c8ee5 GM |
3820 | if (FRAME_WINDOW_P (f)) |
3821 | rif->cursor_to (w->cursor.vpos, w->cursor.hpos, | |
3822 | w->cursor.y, w->cursor.x); | |
3823 | else | |
3824 | { | |
3825 | int x, y; | |
3826 | x = (WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos) | |
7df02016 KS |
3827 | + (INTEGERP (w->left_margin_cols) |
3828 | ? XFASTINT (w->left_margin_cols) | |
5f5c8ee5 GM |
3829 | : 0)); |
3830 | y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
3831 | cursor_to (y, x); | |
4588ec20 | 3832 | } |
177c0ea7 | 3833 | |
5f5c8ee5 GM |
3834 | fflush (stdout); |
3835 | redisplay_performed_directly_p = 1; | |
4588ec20 JB |
3836 | return 1; |
3837 | } | |
5f5c8ee5 GM |
3838 | |
3839 | ||
4588ec20 | 3840 | \f |
5f5c8ee5 GM |
3841 | /*********************************************************************** |
3842 | Frame Update | |
3843 | ***********************************************************************/ | |
4588ec20 | 3844 | |
5f5c8ee5 | 3845 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 3846 | |
5f5c8ee5 GM |
3847 | If FORCE_P is non-zero, don't let redisplay be stopped by detecting |
3848 | pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try | |
3849 | scrolling. | |
177c0ea7 | 3850 | |
5f5c8ee5 | 3851 | Value is non-zero if redisplay was stopped due to pending input. */ |
4588ec20 | 3852 | |
5f5c8ee5 GM |
3853 | int |
3854 | update_frame (f, force_p, inhibit_hairy_id_p) | |
3855 | struct frame *f; | |
3856 | int force_p; | |
3857 | int inhibit_hairy_id_p; | |
3858 | { | |
3859 | /* 1 means display has been paused because of pending input. */ | |
3860 | int paused_p; | |
3861 | struct window *root_window = XWINDOW (f->root_window); | |
3862 | ||
a2130dbb KS |
3863 | if (redisplay_dont_pause) |
3864 | force_p = 1; | |
d012c62b | 3865 | #if PERIODIC_PREEMPTION_CHECKING |
a2130dbb KS |
3866 | else if (NILP (Vredisplay_preemption_period)) |
3867 | force_p = 1; | |
3868 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
3869 | { |
3870 | EMACS_TIME tm; | |
3871 | double p = XFLOATINT (Vredisplay_preemption_period); | |
3872 | int sec, usec; | |
3873 | ||
993d4ab6 KS |
3874 | if (detect_input_pending_ignore_squeezables ()) |
3875 | { | |
3876 | paused_p = 1; | |
3877 | goto do_pause; | |
3878 | } | |
3879 | ||
d012c62b KS |
3880 | sec = (int) p; |
3881 | usec = (p - sec) * 1000000; | |
3882 | ||
3883 | EMACS_GET_TIME (tm); | |
3884 | EMACS_SET_SECS_USECS (preemption_period, sec, usec); | |
3885 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
3886 | } | |
3887 | #endif | |
3888 | ||
5f5c8ee5 | 3889 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3890 | { |
5f5c8ee5 GM |
3891 | /* We are working on window matrix basis. All windows whose |
3892 | flag must_be_updated_p is set have to be updated. */ | |
3893 | ||
3894 | /* Record that we are not working on frame matrices. */ | |
3895 | set_frame_matrix_frame (NULL); | |
3896 | ||
3897 | /* Update all windows in the window tree of F, maybe stopping | |
3898 | when pending input is detected. */ | |
3899 | update_begin (f); | |
3900 | ||
3901 | /* Update the menu bar on X frames that don't have toolkit | |
3902 | support. */ | |
3903 | if (WINDOWP (f->menu_bar_window)) | |
3904 | update_window (XWINDOW (f->menu_bar_window), 1); | |
3905 | ||
3906 | /* Update the tool-bar window, if present. */ | |
9ea173e8 | 3907 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3908 | { |
9ea173e8 | 3909 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3910 | |
3911 | /* Update tool-bar window. */ | |
3912 | if (w->must_be_updated_p) | |
4588ec20 | 3913 | { |
153a073c PJ |
3914 | Lisp_Object tem; |
3915 | ||
5f5c8ee5 GM |
3916 | update_window (w, 1); |
3917 | w->must_be_updated_p = 0; | |
3918 | ||
3919 | /* Swap tool-bar strings. We swap because we want to | |
3920 | reuse strings. */ | |
9ea173e8 GM |
3921 | tem = f->current_tool_bar_string; |
3922 | f->current_tool_bar_string = f->desired_tool_bar_string; | |
3923 | f->desired_tool_bar_string = tem; | |
4588ec20 JB |
3924 | } |
3925 | } | |
177c0ea7 | 3926 | |
5f5c8ee5 GM |
3927 | |
3928 | /* Update windows. */ | |
3929 | paused_p = update_window_tree (root_window, force_p); | |
3930 | update_end (f); | |
177c0ea7 | 3931 | |
5cbd733a KS |
3932 | /* This flush is a performance bottleneck under X, |
3933 | and it doesn't seem to be necessary anyway (in general). | |
3934 | It is necessary when resizing the window with the mouse, or | |
3935 | at least the fringes are not redrawn in a timely manner. ++kfs */ | |
3936 | if (f->force_flush_display_p) | |
3937 | { | |
3938 | rif->flush_display (f); | |
3939 | f->force_flush_display_p = 0; | |
3940 | } | |
4588ec20 | 3941 | } |
5f5c8ee5 GM |
3942 | else |
3943 | { | |
3944 | /* We are working on frame matrix basis. Set the frame on whose | |
3945 | frame matrix we operate. */ | |
3946 | set_frame_matrix_frame (f); | |
3947 | ||
868dd24b | 3948 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3949 | build_frame_matrix (f); |
177c0ea7 | 3950 | |
868dd24b GM |
3951 | /* Update the display */ |
3952 | update_begin (f); | |
5f5c8ee5 | 3953 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3954 | update_end (f); |
3955 | ||
3956 | if (termscript) | |
3957 | fflush (termscript); | |
3958 | fflush (stdout); | |
3959 | ||
5f5c8ee5 | 3960 | /* Check window matrices for lost pointers. */ |
2d5912c1 | 3961 | #if GLYPH_DEBUG |
9b0e97aa GM |
3962 | check_window_matrix_pointers (root_window); |
3963 | add_frame_display_history (f, paused_p); | |
3964 | #endif | |
5f5c8ee5 GM |
3965 | } |
3966 | ||
993d4ab6 | 3967 | do_pause: |
5f5c8ee5 GM |
3968 | /* Reset flags indicating that a window should be updated. */ |
3969 | set_window_update_flags (root_window, 0); | |
177c0ea7 | 3970 | |
868dd24b | 3971 | display_completed = !paused_p; |
5f5c8ee5 | 3972 | return paused_p; |
4588ec20 | 3973 | } |
5f5c8ee5 GM |
3974 | |
3975 | ||
4588ec20 | 3976 | \f |
5f5c8ee5 GM |
3977 | /************************************************************************ |
3978 | Window-based updates | |
3979 | ************************************************************************/ | |
3980 | ||
3981 | /* Perform updates in window tree rooted at W. FORCE_P non-zero means | |
3982 | don't stop updating when input is pending. */ | |
3983 | ||
3984 | static int | |
3985 | update_window_tree (w, force_p) | |
3986 | struct window *w; | |
3987 | int force_p; | |
3988 | { | |
3989 | int paused_p = 0; | |
177c0ea7 | 3990 | |
5f5c8ee5 GM |
3991 | while (w && !paused_p) |
3992 | { | |
3993 | if (!NILP (w->hchild)) | |
3994 | paused_p |= update_window_tree (XWINDOW (w->hchild), force_p); | |
3995 | else if (!NILP (w->vchild)) | |
3996 | paused_p |= update_window_tree (XWINDOW (w->vchild), force_p); | |
3997 | else if (w->must_be_updated_p) | |
3998 | paused_p |= update_window (w, force_p); | |
3999 | ||
4000 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
4001 | } | |
4002 | ||
4003 | return paused_p; | |
4004 | } | |
4005 | ||
4006 | ||
4007 | /* Update window W if its flag must_be_updated_p is non-zero. If | |
4008 | FORCE_P is non-zero, don't stop updating if input is pending. */ | |
4009 | ||
4010 | void | |
4011 | update_single_window (w, force_p) | |
4012 | struct window *w; | |
4013 | int force_p; | |
4014 | { | |
4015 | if (w->must_be_updated_p) | |
4016 | { | |
4017 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
4018 | ||
4019 | /* Record that this is not a frame-based redisplay. */ | |
4020 | set_frame_matrix_frame (NULL); | |
4021 | ||
a2130dbb KS |
4022 | if (redisplay_dont_pause) |
4023 | force_p = 1; | |
d012c62b | 4024 | #if PERIODIC_PREEMPTION_CHECKING |
a2130dbb KS |
4025 | else if (NILP (Vredisplay_preemption_period)) |
4026 | force_p = 1; | |
4027 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
4028 | { |
4029 | EMACS_TIME tm; | |
4030 | double p = XFLOATINT (Vredisplay_preemption_period); | |
4031 | int sec, usec; | |
4032 | ||
4033 | sec = (int) p; | |
4034 | usec = (p - sec) * 1000000; | |
4035 | ||
4036 | EMACS_GET_TIME (tm); | |
4037 | EMACS_SET_SECS_USECS (preemption_period, sec, usec); | |
4038 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
4039 | } | |
4040 | #endif | |
4041 | ||
5f5c8ee5 GM |
4042 | /* Update W. */ |
4043 | update_begin (f); | |
4044 | update_window (w, force_p); | |
4045 | update_end (f); | |
4588ec20 | 4046 | |
5f5c8ee5 GM |
4047 | /* Reset flag in W. */ |
4048 | w->must_be_updated_p = 0; | |
4049 | } | |
4050 | } | |
4588ec20 | 4051 | |
93e023fc | 4052 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 4053 | |
408f5064 GM |
4054 | /* Redraw lines from the current matrix of window W that are |
4055 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
4056 | ||
4057 | static void | |
4058 | redraw_overlapped_rows (w, yb) | |
4059 | struct window *w; | |
4060 | int yb; | |
4061 | { | |
d8ee7803 | 4062 | int i; |
177c0ea7 | 4063 | |
408f5064 GM |
4064 | /* If rows overlapping others have been changed, the rows being |
4065 | overlapped have to be redrawn. This won't draw lines that have | |
4066 | already been drawn in update_window_line because overlapped_p in | |
4067 | desired rows is 0, so after row assignment overlapped_p in | |
4068 | current rows is 0. */ | |
4069 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
4070 | { | |
e876ff42 | 4071 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
4072 | |
4073 | if (!row->enabled_p) | |
4074 | break; | |
4075 | else if (row->mode_line_p) | |
4076 | continue; | |
177c0ea7 | 4077 | |
408f5064 GM |
4078 | if (row->overlapped_p) |
4079 | { | |
4080 | enum glyph_row_area area; | |
177c0ea7 | 4081 | |
408f5064 GM |
4082 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
4083 | { | |
4084 | updated_row = row; | |
4085 | updated_area = area; | |
4086 | rif->cursor_to (i, 0, row->y, area == TEXT_AREA ? row->x : 0); | |
4087 | if (row->used[area]) | |
4088 | rif->write_glyphs (row->glyphs[area], row->used[area]); | |
4089 | rif->clear_end_of_line (-1); | |
4090 | } | |
177c0ea7 | 4091 | |
408f5064 GM |
4092 | row->overlapped_p = 0; |
4093 | } | |
4094 | ||
e876ff42 | 4095 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
4096 | break; |
4097 | } | |
4098 | } | |
4099 | ||
4100 | ||
4101 | /* Redraw lines from the current matrix of window W that overlap | |
4102 | others. YB is bottom-most y-position in W. */ | |
4103 | ||
4104 | static void | |
4105 | redraw_overlapping_rows (w, yb) | |
4106 | struct window *w; | |
4107 | int yb; | |
4108 | { | |
4109 | int i, bottom_y; | |
4110 | struct glyph_row *row; | |
177c0ea7 | 4111 | |
408f5064 GM |
4112 | for (i = 0; i < w->current_matrix->nrows; ++i) |
4113 | { | |
4114 | row = w->current_matrix->rows + i; | |
4115 | ||
4116 | if (!row->enabled_p) | |
4117 | break; | |
4118 | else if (row->mode_line_p) | |
4119 | continue; | |
177c0ea7 | 4120 | |
408f5064 GM |
4121 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
4122 | ||
4123 | if (row->overlapping_p && i > 0 && bottom_y < yb) | |
4124 | { | |
41124e06 YM |
4125 | int overlaps = 0; |
4126 | ||
4127 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) | |
4128 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) | |
4129 | overlaps |= OVERLAPS_PRED; | |
4130 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) | |
4131 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) | |
4132 | overlaps |= OVERLAPS_SUCC; | |
4133 | ||
4134 | if (overlaps) | |
4135 | { | |
4136 | if (row->used[LEFT_MARGIN_AREA]) | |
4137 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
4138 | ||
4139 | if (row->used[TEXT_AREA]) | |
4140 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
4141 | ||
4142 | if (row->used[RIGHT_MARGIN_AREA]) | |
4143 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
4144 | ||
4145 | /* Record in neighbour rows that ROW overwrites part of | |
4146 | their display. */ | |
4147 | if (overlaps & OVERLAPS_PRED) | |
4148 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
4149 | if (overlaps & OVERLAPS_SUCC) | |
4150 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
4151 | } | |
408f5064 GM |
4152 | } |
4153 | ||
4154 | if (bottom_y >= yb) | |
4155 | break; | |
4156 | } | |
4157 | } | |
4158 | ||
93e023fc KS |
4159 | #endif /* HAVE_WINDOW_SYSTEM */ |
4160 | ||
408f5064 | 4161 | |
93962bfa GM |
4162 | #ifdef GLYPH_DEBUG |
4163 | ||
4164 | /* Check that no row in the current matrix of window W is enabled | |
4165 | which is below what's displayed in the window. */ | |
4166 | ||
4167 | void | |
4168 | check_current_matrix_flags (w) | |
4169 | struct window *w; | |
4170 | { | |
4171 | int last_seen_p = 0; | |
4172 | int i, yb = window_text_bottom_y (w); | |
4173 | ||
4174 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
4175 | { | |
4176 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
4177 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
4178 | last_seen_p = 1; | |
4179 | else if (last_seen_p && row->enabled_p) | |
4180 | abort (); | |
4181 | } | |
4182 | } | |
4183 | ||
4184 | #endif /* GLYPH_DEBUG */ | |
4185 | ||
4186 | ||
5f5c8ee5 GM |
4187 | /* Update display of window W. FORCE_P non-zero means that we should |
4188 | not stop when detecting pending input. */ | |
4189 | ||
4190 | static int | |
4191 | update_window (w, force_p) | |
4588ec20 | 4192 | struct window *w; |
5f5c8ee5 | 4193 | int force_p; |
4588ec20 | 4194 | { |
5f5c8ee5 GM |
4195 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4196 | int paused_p; | |
d012c62b | 4197 | #if !PERIODIC_PREEMPTION_CHECKING |
5f5c8ee5 | 4198 | int preempt_count = baud_rate / 2400 + 1; |
d012c62b | 4199 | #endif |
5f5c8ee5 | 4200 | extern int input_pending; |
8fd9a666 | 4201 | extern Lisp_Object do_mouse_tracking; |
b96fd3e8 | 4202 | #if GLYPH_DEBUG |
5f5c8ee5 | 4203 | /* Check that W's frame doesn't have glyph matrices. */ |
82f4a138 | 4204 | xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
5f5c8ee5 | 4205 | xassert (updating_frame != NULL); |
4a34b529 | 4206 | #endif |
5f5c8ee5 GM |
4207 | |
4208 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb KS |
4209 | #if !PERIODIC_PREEMPTION_CHECKING |
4210 | if (!force_p) | |
a2d5fca0 | 4211 | detect_input_pending_ignore_squeezables (); |
d012c62b | 4212 | #endif |
4588ec20 | 4213 | |
5f5c8ee5 GM |
4214 | /* If forced to complete the update, or if no input is pending, do |
4215 | the update. */ | |
8fd9a666 | 4216 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 4217 | { |
5f5c8ee5 GM |
4218 | struct glyph_row *row, *end; |
4219 | struct glyph_row *mode_line_row; | |
56974e03 | 4220 | struct glyph_row *header_line_row; |
e87b8809 | 4221 | int yb, changed_p = 0, mouse_face_overwritten_p = 0, n_updated; |
5f5c8ee5 GM |
4222 | |
4223 | rif->update_window_begin_hook (w); | |
4224 | yb = window_text_bottom_y (w); | |
4225 | ||
153a073c PJ |
4226 | /* If window has a header line, update it before everything else. |
4227 | Adjust y-positions of other rows by the header line height. */ | |
5f5c8ee5 GM |
4228 | row = desired_matrix->rows; |
4229 | end = row + desired_matrix->nrows - 1; | |
177c0ea7 | 4230 | |
5f5c8ee5 | 4231 | if (row->mode_line_p) |
56974e03 GM |
4232 | { |
4233 | header_line_row = row; | |
4234 | ++row; | |
4235 | } | |
4236 | else | |
4237 | header_line_row = NULL; | |
5f5c8ee5 GM |
4238 | |
4239 | /* Update the mode line, if necessary. */ | |
4240 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
4241 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
4242 | { | |
4243 | mode_line_row->y = yb; | |
4244 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
4245 | desired_matrix), |
4246 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
4247 | } |
4248 | ||
4249 | /* Find first enabled row. Optimizations in redisplay_internal | |
4250 | may lead to an update with only one row enabled. There may | |
4251 | be also completely empty matrices. */ | |
4252 | while (row < end && !row->enabled_p) | |
4253 | ++row; | |
177c0ea7 | 4254 | |
bfdcafe1 | 4255 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 4256 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
4257 | { |
4258 | int rc = scrolling_window (w, header_line_row != NULL); | |
4259 | if (rc < 0) | |
4260 | { | |
4261 | /* All rows were found to be equal. */ | |
4262 | paused_p = 0; | |
4263 | goto set_cursor; | |
4264 | } | |
4265 | else if (rc > 0) | |
ed8226ea KS |
4266 | { |
4267 | /* We've scrolled the display. */ | |
4268 | force_p = 1; | |
4269 | changed_p = 1; | |
4270 | } | |
56974e03 | 4271 | } |
5f5c8ee5 | 4272 | |
5f5c8ee5 | 4273 | /* Update the rest of the lines. */ |
e87b8809 | 4274 | for (n_updated = 0; row < end && (force_p || !input_pending); ++row) |
b7412313 | 4275 | if (row->enabled_p) |
5f5c8ee5 GM |
4276 | { |
4277 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
4278 | int i; | |
177c0ea7 | 4279 | |
153a073c | 4280 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
4281 | detect_input_pending. If it's done too often, |
4282 | scrolling large windows with repeated scroll-up | |
4283 | commands will too quickly pause redisplay. */ | |
d012c62b KS |
4284 | #if PERIODIC_PREEMPTION_CHECKING |
4285 | if (!force_p) | |
4286 | { | |
4287 | EMACS_TIME tm, dif; | |
4288 | EMACS_GET_TIME (tm); | |
4289 | EMACS_SUB_TIME (dif, preemption_next_check, tm); | |
4290 | if (EMACS_TIME_NEG_P (dif)) | |
4291 | { | |
4292 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
4293 | if (detect_input_pending_ignore_squeezables ()) |
4294 | break; | |
d012c62b KS |
4295 | } |
4296 | } | |
4297 | #else | |
e87b8809 | 4298 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 4299 | detect_input_pending_ignore_squeezables (); |
d012c62b | 4300 | #endif |
e876ff42 GM |
4301 | changed_p |= update_window_line (w, vpos, |
4302 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
4303 | |
4304 | /* Mark all rows below the last visible one in the current | |
4305 | matrix as invalid. This is necessary because of | |
4306 | variable line heights. Consider the case of three | |
4307 | successive redisplays, where the first displays 5 | |
4308 | lines, the second 3 lines, and the third 5 lines again. | |
4309 | If the second redisplay wouldn't mark rows in the | |
4310 | current matrix invalid, the third redisplay might be | |
4311 | tempted to optimize redisplay based on lines displayed | |
4312 | in the first redisplay. */ | |
4313 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
4314 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
4315 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
4316 | } | |
4317 | ||
4318 | /* Was display preempted? */ | |
4319 | paused_p = row < end; | |
177c0ea7 | 4320 | |
56974e03 | 4321 | set_cursor: |
177c0ea7 | 4322 | |
52d2d88a KS |
4323 | /* Update the header line after scrolling because a new header |
4324 | line would otherwise overwrite lines at the top of the window | |
4325 | that can be scrolled. */ | |
4326 | if (header_line_row && header_line_row->enabled_p) | |
4327 | { | |
4328 | header_line_row->y = 0; | |
4329 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
52d2d88a KS |
4330 | } |
4331 | ||
153a073c | 4332 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
4333 | if (!paused_p && !w->pseudo_window_p) |
4334 | { | |
93e023fc | 4335 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
4336 | if (changed_p && rif->fix_overlapping_area) |
4337 | { | |
4338 | redraw_overlapped_rows (w, yb); | |
4339 | redraw_overlapping_rows (w, yb); | |
4340 | } | |
93e023fc | 4341 | #endif |
177c0ea7 | 4342 | |
5f5c8ee5 GM |
4343 | /* Make cursor visible at cursor position of W. */ |
4344 | set_window_cursor_after_update (w); | |
4345 | ||
e876ff42 GM |
4346 | #if 0 /* Check that current matrix invariants are satisfied. This is |
4347 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
4348 | IF_DEBUG (check_matrix_invariants (w)); |
4349 | #endif | |
4588ec20 | 4350 | } |
5f5c8ee5 GM |
4351 | |
4352 | #if GLYPH_DEBUG | |
4353 | /* Remember the redisplay method used to display the matrix. */ | |
4354 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
4355 | #endif | |
408f5064 | 4356 | |
7af0e8d7 | 4357 | #ifdef HAVE_WINDOW_SYSTEM |
60e99293 | 4358 | update_window_fringes (w, 0); |
7af0e8d7 | 4359 | #endif |
60e99293 | 4360 | |
56974e03 GM |
4361 | /* End the update of window W. Don't set the cursor if we |
4362 | paused updating the display because in this case, | |
4363 | set_window_cursor_after_update hasn't been called, and | |
4364 | output_cursor doesn't contain the cursor location. */ | |
4365 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); | |
4588ec20 | 4366 | } |
5f5c8ee5 GM |
4367 | else |
4368 | paused_p = 1; | |
4369 | ||
2d5912c1 | 4370 | #if GLYPH_DEBUG |
0cffd9d8 | 4371 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
4372 | add_window_display_history (w, w->current_matrix->method, paused_p); |
4373 | #endif | |
177c0ea7 | 4374 | |
5f5c8ee5 | 4375 | clear_glyph_matrix (desired_matrix); |
408f5064 | 4376 | |
5f5c8ee5 | 4377 | return paused_p; |
4588ec20 JB |
4378 | } |
4379 | ||
b64b3980 | 4380 | |
5f5c8ee5 GM |
4381 | /* Update the display of area AREA in window W, row number VPOS. |
4382 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
4383 | ||
4384 | static void | |
4385 | update_marginal_area (w, area, vpos) | |
b64b3980 | 4386 | struct window *w; |
5f5c8ee5 | 4387 | int area, vpos; |
b64b3980 | 4388 | { |
5f5c8ee5 GM |
4389 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
4390 | ||
4391 | /* Let functions in xterm.c know what area subsequent X positions | |
4392 | will be relative to. */ | |
4393 | updated_area = area; | |
4394 | ||
4395 | /* Set cursor to start of glyphs, write them, and clear to the end | |
4396 | of the area. I don't think that something more sophisticated is | |
4397 | necessary here, since marginal areas will not be the default. */ | |
4398 | rif->cursor_to (vpos, 0, desired_row->y, 0); | |
4399 | if (desired_row->used[area]) | |
4400 | rif->write_glyphs (desired_row->glyphs[area], desired_row->used[area]); | |
4401 | rif->clear_end_of_line (-1); | |
b64b3980 | 4402 | } |
23b0200c | 4403 | |
352f1545 | 4404 | |
408f5064 GM |
4405 | /* Update the display of the text area of row VPOS in window W. |
4406 | Value is non-zero if display has changed. */ | |
5f5c8ee5 | 4407 | |
408f5064 | 4408 | static int |
5f5c8ee5 | 4409 | update_text_area (w, vpos) |
23b0200c | 4410 | struct window *w; |
5f5c8ee5 | 4411 | int vpos; |
23b0200c | 4412 | { |
5f5c8ee5 GM |
4413 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
4414 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
408f5064 | 4415 | int changed_p = 0; |
5f5c8ee5 GM |
4416 | |
4417 | /* Let functions in xterm.c know what area subsequent X positions | |
4418 | will be relative to. */ | |
4419 | updated_area = TEXT_AREA; | |
177c0ea7 | 4420 | |
5f5c8ee5 GM |
4421 | /* If rows are at different X or Y, or rows have different height, |
4422 | or the current row is marked invalid, write the entire line. */ | |
4423 | if (!current_row->enabled_p | |
4424 | || desired_row->y != current_row->y | |
4425 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
4426 | || desired_row->phys_ascent != current_row->phys_ascent |
4427 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 4428 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 4429 | || current_row->overlapped_p |
fee8b690 CY |
4430 | /* This next line is necessary for correctly redrawing |
4431 | mouse-face areas after scrolling and other operations. | |
4432 | However, it causes excessive flickering when mouse is moved | |
4433 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
4434 | line doesn't seem to hurt anything. -- cyd. |
4435 | But it is still needed for the header line. -- kfs. */ | |
4436 | || (current_row->mouse_face_p | |
4437 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
4438 | || current_row->x != desired_row->x) |
4439 | { | |
4440 | rif->cursor_to (vpos, 0, desired_row->y, desired_row->x); | |
177c0ea7 | 4441 | |
5f5c8ee5 GM |
4442 | if (desired_row->used[TEXT_AREA]) |
4443 | rif->write_glyphs (desired_row->glyphs[TEXT_AREA], | |
4444 | desired_row->used[TEXT_AREA]); | |
177c0ea7 | 4445 | |
5f5c8ee5 GM |
4446 | /* Clear to end of window. */ |
4447 | rif->clear_end_of_line (-1); | |
408f5064 | 4448 | changed_p = 1; |
60f2f3f1 GM |
4449 | |
4450 | /* This erases the cursor. We do this here because | |
4451 | notice_overwritten_cursor cannot easily check this, which | |
4452 | might indicate that the whole functionality of | |
4453 | notice_overwritten_cursor would better be implemented here. | |
4454 | On the other hand, we need notice_overwritten_cursor as long | |
4455 | as mouse highlighting is done asynchronously outside of | |
4456 | redisplay. */ | |
4457 | if (vpos == w->phys_cursor.vpos) | |
4458 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
4459 | } |
4460 | else | |
4461 | { | |
4462 | int stop, i, x; | |
4463 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
4464 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
e47306e6 | 4465 | int overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 4466 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
5f5c8ee5 | 4467 | |
78897758 YM |
4468 | /* If the desired row extends its face to the text area end, and |
4469 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
4470 | make sure we write at least one glyph, so that the face |
4471 | extension actually takes place. */ | |
78897758 YM |
4472 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
4473 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
4474 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
4475 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 4476 | --desired_stop_pos; |
177c0ea7 | 4477 | |
5f5c8ee5 GM |
4478 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
4479 | i = 0; | |
4480 | x = desired_row->x; | |
8399f8a0 GM |
4481 | |
4482 | /* Loop over glyphs that current and desired row may have | |
4483 | in common. */ | |
5f5c8ee5 | 4484 | while (i < stop) |
352f1545 | 4485 | { |
6d950f4c | 4486 | int can_skip_p = 1; |
177c0ea7 | 4487 | |
5f5c8ee5 | 4488 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
4489 | don't have to be written. We can't skip if the last |
4490 | current glyph overlaps the glyph to its right. For | |
4491 | example, consider a current row of `if ' with the `f' in | |
4492 | Courier bold so that it overlaps the ` ' to its right. | |
4493 | If the desired row is ` ', we would skip over the space | |
4494 | after the `if' and there would remain a pixel from the | |
4495 | `f' on the screen. */ | |
4496 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 4497 | { |
e47306e6 GM |
4498 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
4499 | int left, right; | |
177c0ea7 | 4500 | |
e47306e6 GM |
4501 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
4502 | &left, &right); | |
6d950f4c | 4503 | can_skip_p = right == 0; |
352f1545 | 4504 | } |
177c0ea7 | 4505 | |
6d950f4c | 4506 | if (can_skip_p) |
352f1545 | 4507 | { |
6d950f4c GM |
4508 | while (i < stop |
4509 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
4510 | { | |
4511 | x += desired_glyph->pixel_width; | |
4512 | ++desired_glyph, ++current_glyph, ++i; | |
4513 | } | |
4514 | ||
4515 | /* Consider the case that the current row contains "xxx | |
4516 | ppp ggg" in italic Courier font, and the desired row | |
4517 | is "xxx ggg". The character `p' has lbearing, `g' | |
4518 | has not. The loop above will stop in front of the | |
4519 | first `p' in the current row. If we would start | |
4520 | writing glyphs there, we wouldn't erase the lbearing | |
4521 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 4522 | taken care of by draw_glyphs. */ |
6d950f4c GM |
4523 | if (overlapping_glyphs_p |
4524 | && i > 0 | |
4525 | && i < current_row->used[TEXT_AREA] | |
4526 | && (current_row->used[TEXT_AREA] | |
4527 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 4528 | { |
6d950f4c | 4529 | int left, right; |
177c0ea7 | 4530 | |
6d950f4c GM |
4531 | rif->get_glyph_overhangs (current_glyph, XFRAME (w->frame), |
4532 | &left, &right); | |
4533 | while (left > 0 && i > 0) | |
4534 | { | |
4535 | --i, --desired_glyph, --current_glyph; | |
4536 | x -= desired_glyph->pixel_width; | |
4537 | left -= desired_glyph->pixel_width; | |
4538 | } | |
5f5c8ee5 | 4539 | } |
352f1545 | 4540 | } |
177c0ea7 | 4541 | |
5f5c8ee5 GM |
4542 | /* Try to avoid writing the entire rest of the desired row |
4543 | by looking for a resync point. This mainly prevents | |
4544 | mode line flickering in the case the mode line is in | |
4545 | fixed-pitch font, which it usually will be. */ | |
4546 | if (i < desired_row->used[TEXT_AREA]) | |
4547 | { | |
4548 | int start_x = x, start_hpos = i; | |
4549 | struct glyph *start = desired_glyph; | |
4550 | int current_x = x; | |
6d950f4c GM |
4551 | int skip_first_p = !can_skip_p; |
4552 | ||
5f5c8ee5 GM |
4553 | /* Find the next glyph that's equal again. */ |
4554 | while (i < stop | |
6d950f4c GM |
4555 | && (skip_first_p |
4556 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
4557 | && x == current_x) |
4558 | { | |
4559 | x += desired_glyph->pixel_width; | |
4560 | current_x += current_glyph->pixel_width; | |
4561 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 4562 | skip_first_p = 0; |
5f5c8ee5 | 4563 | } |
23b0200c | 4564 | |
5f5c8ee5 GM |
4565 | if (i == start_hpos || x != current_x) |
4566 | { | |
4567 | i = start_hpos; | |
4568 | x = start_x; | |
4569 | desired_glyph = start; | |
4570 | break; | |
4571 | } | |
e47306e6 | 4572 | |
5f5c8ee5 GM |
4573 | rif->cursor_to (vpos, start_hpos, desired_row->y, start_x); |
4574 | rif->write_glyphs (start, i - start_hpos); | |
408f5064 | 4575 | changed_p = 1; |
5f5c8ee5 GM |
4576 | } |
4577 | } | |
177c0ea7 | 4578 | |
5f5c8ee5 GM |
4579 | /* Write the rest. */ |
4580 | if (i < desired_row->used[TEXT_AREA]) | |
4581 | { | |
4582 | rif->cursor_to (vpos, i, desired_row->y, x); | |
4583 | rif->write_glyphs (desired_glyph, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 4584 | changed_p = 1; |
5f5c8ee5 | 4585 | } |
177c0ea7 | 4586 | |
5f5c8ee5 GM |
4587 | /* Maybe clear to end of line. */ |
4588 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
4589 | { | |
4590 | /* If new row extends to the end of the text area, nothing | |
4591 | has to be cleared, if and only if we did a write_glyphs | |
4592 | above. This is made sure by setting desired_stop_pos | |
4593 | appropriately above. */ | |
78897758 YM |
4594 | xassert (i < desired_row->used[TEXT_AREA] |
4595 | || ((desired_row->used[TEXT_AREA] | |
4596 | == current_row->used[TEXT_AREA]) | |
4597 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
4598 | } |
4599 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
4600 | { | |
4601 | /* If old row extends to the end of the text area, clear. */ | |
4602 | if (i >= desired_row->used[TEXT_AREA]) | |
4603 | rif->cursor_to (vpos, i, desired_row->y, | |
23228cfa | 4604 | desired_row->pixel_width); |
5f5c8ee5 | 4605 | rif->clear_end_of_line (-1); |
408f5064 | 4606 | changed_p = 1; |
5f5c8ee5 GM |
4607 | } |
4608 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 4609 | { |
5f5c8ee5 GM |
4610 | /* Otherwise clear to the end of the old row. Everything |
4611 | after that position should be clear already. */ | |
4612 | int x; | |
177c0ea7 | 4613 | |
5f5c8ee5 GM |
4614 | if (i >= desired_row->used[TEXT_AREA]) |
4615 | rif->cursor_to (vpos, i, desired_row->y, | |
23228cfa | 4616 | desired_row->pixel_width); |
5f5c8ee5 GM |
4617 | |
4618 | /* If cursor is displayed at the end of the line, make sure | |
4619 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
4620 | with which to erase the cursor (because this method | |
4621 | doesn't work with lbearing/rbearing), so we must do it | |
4622 | this way. */ | |
4623 | if (vpos == w->phys_cursor.vpos | |
4624 | && w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]) | |
4625 | { | |
4626 | w->phys_cursor_on_p = 0; | |
4627 | x = -1; | |
4628 | } | |
4629 | else | |
23228cfa | 4630 | x = current_row->pixel_width; |
5f5c8ee5 | 4631 | rif->clear_end_of_line (x); |
408f5064 | 4632 | changed_p = 1; |
2e8907d3 | 4633 | } |
23b0200c | 4634 | } |
408f5064 GM |
4635 | |
4636 | return changed_p; | |
23b0200c | 4637 | } |
4588ec20 | 4638 | |
5f5c8ee5 | 4639 | |
408f5064 GM |
4640 | /* Update row VPOS in window W. Value is non-zero if display has been |
4641 | changed. */ | |
5f5c8ee5 | 4642 | |
408f5064 | 4643 | static int |
e876ff42 | 4644 | update_window_line (w, vpos, mouse_face_overwritten_p) |
5f5c8ee5 | 4645 | struct window *w; |
e876ff42 | 4646 | int vpos, *mouse_face_overwritten_p; |
5f5c8ee5 GM |
4647 | { |
4648 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
4649 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
408f5064 | 4650 | int changed_p = 0; |
5f5c8ee5 | 4651 | |
5f5c8ee5 GM |
4652 | /* Set the row being updated. This is important to let xterm.c |
4653 | know what line height values are in effect. */ | |
4654 | updated_row = desired_row; | |
4655 | ||
177c0ea7 JB |
4656 | /* A row can be completely invisible in case a desired matrix was |
4657 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
4658 | the matrix. Make sure to make such rows current anyway, since |
4659 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
4660 | if (desired_row->mode_line_p |
4661 | || desired_row->visible_height > 0) | |
408f5064 | 4662 | { |
504805ac GM |
4663 | xassert (desired_row->enabled_p); |
4664 | ||
4665 | /* Update display of the left margin area, if there is one. */ | |
4666 | if (!desired_row->full_width_p | |
7df02016 | 4667 | && !NILP (w->left_margin_cols)) |
504805ac GM |
4668 | { |
4669 | changed_p = 1; | |
4670 | update_marginal_area (w, LEFT_MARGIN_AREA, vpos); | |
4671 | } | |
177c0ea7 | 4672 | |
504805ac GM |
4673 | /* Update the display of the text area. */ |
4674 | if (update_text_area (w, vpos)) | |
4675 | { | |
4676 | changed_p = 1; | |
4677 | if (current_row->mouse_face_p) | |
4678 | *mouse_face_overwritten_p = 1; | |
4679 | } | |
177c0ea7 | 4680 | |
504805ac GM |
4681 | /* Update display of the right margin area, if there is one. */ |
4682 | if (!desired_row->full_width_p | |
7df02016 | 4683 | && !NILP (w->right_margin_cols)) |
504805ac GM |
4684 | { |
4685 | changed_p = 1; | |
4686 | update_marginal_area (w, RIGHT_MARGIN_AREA, vpos); | |
4687 | } | |
177c0ea7 | 4688 | |
504805ac GM |
4689 | /* Draw truncation marks etc. */ |
4690 | if (!current_row->enabled_p | |
4691 | || desired_row->y != current_row->y | |
4692 | || desired_row->visible_height != current_row->visible_height | |
60e99293 | 4693 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 4694 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
60e99293 | 4695 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 4696 | || desired_row->mode_line_p != current_row->mode_line_p |
60e99293 | 4697 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
4698 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
4699 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
4700 | rif->after_update_window_line_hook (desired_row); | |
408f5064 | 4701 | } |
177c0ea7 | 4702 | |
5f5c8ee5 GM |
4703 | /* Update current_row from desired_row. */ |
4704 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
4705 | updated_row = NULL; | |
408f5064 | 4706 | return changed_p; |
5f5c8ee5 GM |
4707 | } |
4708 | ||
4709 | ||
4710 | /* Set the cursor after an update of window W. This function may only | |
4711 | be called from update_window. */ | |
4712 | ||
4713 | static void | |
4714 | set_window_cursor_after_update (w) | |
4588ec20 JB |
4715 | struct window *w; |
4716 | { | |
5f5c8ee5 GM |
4717 | struct frame *f = XFRAME (w->frame); |
4718 | int cx, cy, vpos, hpos; | |
4719 | ||
4720 | /* Not intended for frame matrix updates. */ | |
4721 | xassert (FRAME_WINDOW_P (f)); | |
177c0ea7 | 4722 | |
b96fd3e8 GM |
4723 | if (cursor_in_echo_area |
4724 | && !NILP (echo_area_buffer[0]) | |
4725 | /* If we are showing a message instead of the mini-buffer, | |
4726 | show the cursor for the message instead. */ | |
4727 | && XWINDOW (minibuf_window) == w | |
4728 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
4729 | /* These cases apply only to the frame that contains |
4730 | the active mini-buffer window. */ | |
4731 | && FRAME_HAS_MINIBUF_P (f) | |
4732 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
4733 | { | |
4734 | cx = cy = vpos = hpos = 0; | |
4735 | ||
4736 | if (cursor_in_echo_area >= 0) | |
4737 | { | |
4738 | /* If the mini-buffer is several lines high, find the last | |
4739 | line that has any text on it. Note: either all lines | |
4740 | are enabled or none. Otherwise we wouldn't be able to | |
4741 | determine Y. */ | |
862b4790 GM |
4742 | struct glyph_row *row, *last_row; |
4743 | struct glyph *glyph; | |
4744 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 4745 | |
862b4790 | 4746 | last_row = NULL; |
6206f8ce GM |
4747 | row = w->current_matrix->rows; |
4748 | while (row->enabled_p | |
4749 | && (last_row == NULL | |
4750 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 4751 | { |
862b4790 GM |
4752 | if (row->used[TEXT_AREA] |
4753 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
4754 | last_row = row; | |
6206f8ce | 4755 | ++row; |
862b4790 | 4756 | } |
177c0ea7 | 4757 | |
5f5c8ee5 GM |
4758 | if (last_row) |
4759 | { | |
6206f8ce GM |
4760 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
4761 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 4762 | |
b96fd3e8 | 4763 | while (last > start && last->charpos < 0) |
862b4790 | 4764 | --last; |
177c0ea7 | 4765 | |
862b4790 GM |
4766 | for (glyph = start; glyph < last; ++glyph) |
4767 | { | |
4768 | cx += glyph->pixel_width; | |
4769 | ++hpos; | |
4770 | } | |
4771 | ||
5f5c8ee5 | 4772 | cy = last_row->y; |
862b4790 | 4773 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
4774 | } |
4775 | } | |
4776 | } | |
4777 | else | |
4778 | { | |
4779 | cx = w->cursor.x; | |
4780 | cy = w->cursor.y; | |
4781 | hpos = w->cursor.hpos; | |
4782 | vpos = w->cursor.vpos; | |
4783 | } | |
4588ec20 | 4784 | |
5f5c8ee5 GM |
4785 | /* Window cursor can be out of sync for horizontally split windows. */ |
4786 | hpos = max (0, hpos); | |
4787 | hpos = min (w->current_matrix->matrix_w - 1, hpos); | |
4788 | vpos = max (0, vpos); | |
4789 | vpos = min (w->current_matrix->nrows - 1, vpos); | |
4790 | rif->cursor_to (vpos, hpos, cy, cx); | |
4588ec20 | 4791 | } |
4588ec20 | 4792 | |
5f5c8ee5 | 4793 | |
6df5d75f GM |
4794 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window |
4795 | tree rooted at W. */ | |
4796 | ||
4797 | void | |
4798 | set_window_update_flags (w, on_p) | |
4799 | struct window *w; | |
4800 | int on_p; | |
4801 | { | |
4802 | while (w) | |
4803 | { | |
4804 | if (!NILP (w->hchild)) | |
4805 | set_window_update_flags (XWINDOW (w->hchild), on_p); | |
4806 | else if (!NILP (w->vchild)) | |
4807 | set_window_update_flags (XWINDOW (w->vchild), on_p); | |
4808 | else | |
4809 | w->must_be_updated_p = on_p; | |
4810 | ||
4811 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
4812 | } | |
177c0ea7 | 4813 | } |
6df5d75f GM |
4814 | |
4815 | ||
4816 | \f | |
4817 | /*********************************************************************** | |
4818 | Window-Based Scrolling | |
4819 | ***********************************************************************/ | |
4820 | ||
4821 | /* Structure describing rows in scrolling_window. */ | |
4822 | ||
4823 | struct row_entry | |
4824 | { | |
4825 | /* Number of occurrences of this row in desired and current matrix. */ | |
4826 | int old_uses, new_uses; | |
177c0ea7 | 4827 | |
6df5d75f GM |
4828 | /* Vpos of row in new matrix. */ |
4829 | int new_line_number; | |
4830 | ||
4831 | /* Bucket index of this row_entry in the hash table row_table. */ | |
4832 | int bucket; | |
177c0ea7 | 4833 | |
6df5d75f GM |
4834 | /* The row described by this entry. */ |
4835 | struct glyph_row *row; | |
177c0ea7 | 4836 | |
6df5d75f GM |
4837 | /* Hash collision chain. */ |
4838 | struct row_entry *next; | |
4839 | }; | |
4840 | ||
4841 | /* A pool to allocate row_entry structures from, and the size of the | |
4842 | pool. The pool is reallocated in scrolling_window when we find | |
4843 | that we need a larger one. */ | |
4844 | ||
4845 | static struct row_entry *row_entry_pool; | |
4846 | static int row_entry_pool_size; | |
4847 | ||
4848 | /* Index of next free entry in row_entry_pool. */ | |
4849 | ||
4850 | static int row_entry_idx; | |
4851 | ||
4852 | /* The hash table used during scrolling, and the table's size. This | |
4853 | table is used to quickly identify equal rows in the desired and | |
4854 | current matrix. */ | |
4855 | ||
4856 | static struct row_entry **row_table; | |
4857 | static int row_table_size; | |
4858 | ||
4859 | /* Vectors of pointers to row_entry structures belonging to the | |
4860 | current and desired matrix, and the size of the vectors. */ | |
4861 | ||
4862 | static struct row_entry **old_lines, **new_lines; | |
4863 | static int old_lines_size, new_lines_size; | |
4864 | ||
4865 | /* A pool to allocate run structures from, and its size. */ | |
4866 | ||
4867 | static struct run *run_pool; | |
4868 | static int runs_size; | |
4869 | ||
4870 | /* A vector of runs of lines found during scrolling. */ | |
4871 | ||
4872 | static struct run **runs; | |
4873 | ||
6df5d75f GM |
4874 | /* Add glyph row ROW to the scrolling hash table during the scrolling |
4875 | of window W. */ | |
4876 | ||
4877 | static INLINE struct row_entry * | |
4878 | add_row_entry (w, row) | |
4879 | struct window *w; | |
4880 | struct glyph_row *row; | |
4881 | { | |
4882 | struct row_entry *entry; | |
4883 | int i = row->hash % row_table_size; | |
177c0ea7 | 4884 | |
6df5d75f | 4885 | entry = row_table[i]; |
e4e0bee9 | 4886 | while (entry && !row_equal_p (w, entry->row, row, 1)) |
6df5d75f | 4887 | entry = entry->next; |
177c0ea7 | 4888 | |
6df5d75f GM |
4889 | if (entry == NULL) |
4890 | { | |
4891 | entry = row_entry_pool + row_entry_idx++; | |
4892 | entry->row = row; | |
4893 | entry->old_uses = entry->new_uses = 0; | |
4894 | entry->new_line_number = 0; | |
4895 | entry->bucket = i; | |
4896 | entry->next = row_table[i]; | |
4897 | row_table[i] = entry; | |
4898 | } | |
4899 | ||
4900 | return entry; | |
4901 | } | |
4902 | ||
4903 | ||
5f5c8ee5 | 4904 | /* Try to reuse part of the current display of W by scrolling lines. |
153a073c | 4905 | HEADER_LINE_P non-zero means W has a header line. |
5f5c8ee5 GM |
4906 | |
4907 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4908 | Technique for Isolating Differences Between Files." It should take | |
4909 | O(N) time. | |
4910 | ||
4911 | A short outline of the steps of the algorithm | |
4912 | ||
4913 | 1. Skip lines equal at the start and end of both matrices. | |
4914 | ||
4915 | 2. Enter rows in the current and desired matrix into a symbol | |
4916 | table, counting how often they appear in both matrices. | |
4917 | ||
4918 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4919 | i.e. we assume that such lines are likely to have been moved. | |
4920 | ||
4921 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4922 | forward and backward. | |
4923 | ||
4924 | Value is | |
4925 | ||
4926 | -1 if all rows were found to be equal. | |
4927 | 0 to indicate that we did not scroll the display, or | |
4928 | 1 if we did scroll. */ | |
4929 | ||
4930 | static int | |
045dee35 | 4931 | scrolling_window (w, header_line_p) |
5f5c8ee5 | 4932 | struct window *w; |
045dee35 | 4933 | int header_line_p; |
4588ec20 | 4934 | { |
5f5c8ee5 GM |
4935 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4936 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4937 | int yb = window_text_bottom_y (w); | |
6df5d75f GM |
4938 | int i, j, first_old, first_new, last_old, last_new; |
4939 | int nruns, nbytes, n, run_idx; | |
4940 | struct row_entry *entry; | |
5f5c8ee5 GM |
4941 | |
4942 | /* Skip over rows equal at the start. */ | |
bfdcafe1 | 4943 | for (i = header_line_p ? 1 : 0; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4944 | { |
bfdcafe1 GM |
4945 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4946 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4947 | ||
4948 | if (c->enabled_p | |
4949 | && d->enabled_p | |
60e99293 | 4950 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4951 | && c->y == d->y |
4952 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4953 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
4954 | && row_equal_p (w, c, d, 1)) | |
4955 | { | |
4956 | assign_row (c, d); | |
4957 | d->enabled_p = 0; | |
4958 | } | |
4959 | else | |
4960 | break; | |
5f5c8ee5 | 4961 | } |
4588ec20 | 4962 | |
5f5c8ee5 GM |
4963 | /* Give up if some rows in the desired matrix are not enabled. */ |
4964 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4965 | return -1; | |
177c0ea7 | 4966 | |
5f5c8ee5 GM |
4967 | first_old = first_new = i; |
4968 | ||
4969 | /* Set last_new to the index + 1 of the last enabled row in the | |
4970 | desired matrix. */ | |
4971 | i = first_new + 1; | |
4972 | while (i < desired_matrix->nrows - 1 | |
4973 | && MATRIX_ROW (desired_matrix, i)->enabled_p | |
6df5d75f | 4974 | && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)) <= yb) |
5f5c8ee5 GM |
4975 | ++i; |
4976 | ||
4977 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4978 | return 0; | |
4979 | ||
4980 | last_new = i; | |
4981 | ||
4982 | /* Set last_old to the index + 1 of the last enabled row in the | |
4983 | current matrix. We don't look at the enabled flag here because | |
4984 | we plan to reuse part of the display even if other parts are | |
4985 | disabled. */ | |
4986 | i = first_old + 1; | |
93962bfa GM |
4987 | while (i < current_matrix->nrows - 1) |
4988 | { | |
4989 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4990 | if (bottom <= yb) | |
4991 | ++i; | |
4992 | if (bottom >= yb) | |
4993 | break; | |
4994 | } | |
4995 | ||
5f5c8ee5 GM |
4996 | last_old = i; |
4997 | ||
4998 | /* Skip over rows equal at the bottom. */ | |
4999 | i = last_new; | |
5000 | j = last_old; | |
5001 | while (i - 1 > first_new | |
5002 | && j - 1 > first_old | |
5003 | && MATRIX_ROW (current_matrix, i - 1)->enabled_p | |
5004 | && (MATRIX_ROW (current_matrix, i - 1)->y | |
5005 | == MATRIX_ROW (desired_matrix, j - 1)->y) | |
60e99293 | 5006 | && !MATRIX_ROW (desired_matrix, j - 1)->redraw_fringe_bitmaps_p |
5f5c8ee5 GM |
5007 | && row_equal_p (w, |
5008 | MATRIX_ROW (desired_matrix, i - 1), | |
e4e0bee9 | 5009 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
5010 | --i, --j; |
5011 | last_new = i; | |
5012 | last_old = j; | |
5013 | ||
5014 | /* Nothing to do if all rows are equal. */ | |
5015 | if (last_new == first_new) | |
5016 | return 0; | |
5017 | ||
6df5d75f | 5018 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 5019 | |
6df5d75f GM |
5020 | if (current_matrix->nrows > old_lines_size) |
5021 | { | |
5022 | old_lines_size = current_matrix->nrows; | |
5023 | nbytes = old_lines_size * sizeof *old_lines; | |
5024 | old_lines = (struct row_entry **) xrealloc (old_lines, nbytes); | |
5025 | } | |
177c0ea7 | 5026 | |
6df5d75f GM |
5027 | if (desired_matrix->nrows > new_lines_size) |
5028 | { | |
5029 | new_lines_size = desired_matrix->nrows; | |
5030 | nbytes = new_lines_size * sizeof *new_lines; | |
5031 | new_lines = (struct row_entry **) xrealloc (new_lines, nbytes); | |
5032 | } | |
5033 | ||
5034 | n = desired_matrix->nrows + current_matrix->nrows; | |
5035 | if (3 * n > row_table_size) | |
5036 | { | |
5037 | row_table_size = next_almost_prime (3 * n); | |
5038 | nbytes = row_table_size * sizeof *row_table; | |
5039 | row_table = (struct row_entry **) xrealloc (row_table, nbytes); | |
5040 | bzero (row_table, nbytes); | |
5041 | } | |
5042 | ||
5043 | if (n > row_entry_pool_size) | |
5044 | { | |
5045 | row_entry_pool_size = n; | |
5046 | nbytes = row_entry_pool_size * sizeof *row_entry_pool; | |
5047 | row_entry_pool = (struct row_entry *) xrealloc (row_entry_pool, nbytes); | |
5048 | } | |
5049 | ||
5050 | if (desired_matrix->nrows > runs_size) | |
5051 | { | |
5052 | runs_size = desired_matrix->nrows; | |
5053 | nbytes = runs_size * sizeof *runs; | |
5054 | runs = (struct run **) xrealloc (runs, nbytes); | |
5055 | nbytes = runs_size * sizeof *run_pool; | |
5056 | run_pool = (struct run *) xrealloc (run_pool, nbytes); | |
5057 | } | |
5058 | ||
5059 | nruns = run_idx = 0; | |
5060 | row_entry_idx = 0; | |
5061 | ||
5062 | /* Add rows from the current and desired matrix to the hash table | |
5063 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 5064 | |
5f5c8ee5 GM |
5065 | for (i = first_old; i < last_old; ++i) |
5066 | { | |
5067 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
5068 | { | |
6df5d75f GM |
5069 | entry = add_row_entry (w, MATRIX_ROW (current_matrix, i)); |
5070 | old_lines[i] = entry; | |
5071 | ++entry->old_uses; | |
5f5c8ee5 GM |
5072 | } |
5073 | else | |
6df5d75f | 5074 | old_lines[i] = NULL; |
5f5c8ee5 GM |
5075 | } |
5076 | ||
5f5c8ee5 GM |
5077 | for (i = first_new; i < last_new; ++i) |
5078 | { | |
5079 | xassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); | |
6df5d75f GM |
5080 | entry = add_row_entry (w, MATRIX_ROW (desired_matrix, i)); |
5081 | ++entry->new_uses; | |
5082 | entry->new_line_number = i; | |
5083 | new_lines[i] = entry; | |
5f5c8ee5 | 5084 | } |
4588ec20 | 5085 | |
5f5c8ee5 GM |
5086 | /* Identify moves based on lines that are unique and equal |
5087 | in both matrices. */ | |
5088 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
5089 | if (old_lines[i] |
5090 | && old_lines[i]->old_uses == 1 | |
5091 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 GM |
5092 | { |
5093 | int j, k; | |
6df5d75f GM |
5094 | int new_line = old_lines[i]->new_line_number; |
5095 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
5096 | |
5097 | /* Record move. */ | |
5098 | run->current_vpos = i; | |
5099 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
5100 | run->desired_vpos = new_line; | |
5101 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
5102 | run->nrows = 1; | |
5103 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
5104 | ||
5105 | /* Extend backward. */ | |
5106 | j = i - 1; | |
5107 | k = new_line - 1; | |
5108 | while (j > first_old | |
5109 | && k > first_new | |
6df5d75f | 5110 | && old_lines[j] == new_lines[k]) |
5f5c8ee5 GM |
5111 | { |
5112 | int h = MATRIX_ROW (current_matrix, j)->height; | |
177c0ea7 JB |
5113 | --run->current_vpos; |
5114 | --run->desired_vpos; | |
5f5c8ee5 GM |
5115 | ++run->nrows; |
5116 | run->height += h; | |
5117 | run->desired_y -= h; | |
5118 | run->current_y -= h; | |
5119 | --j, --k; | |
5120 | } | |
4588ec20 | 5121 | |
5f5c8ee5 GM |
5122 | /* Extend forward. */ |
5123 | j = i + 1; | |
5124 | k = new_line + 1; | |
5125 | while (j < last_old | |
5126 | && k < last_new | |
6df5d75f | 5127 | && old_lines[j] == new_lines[k]) |
5f5c8ee5 GM |
5128 | { |
5129 | int h = MATRIX_ROW (current_matrix, j)->height; | |
177c0ea7 | 5130 | ++run->nrows; |
5f5c8ee5 GM |
5131 | run->height += h; |
5132 | ++j, ++k; | |
5133 | } | |
19dff8dc | 5134 | |
5f5c8ee5 GM |
5135 | /* Insert run into list of all runs. Order runs by copied |
5136 | pixel lines. Note that we record runs that don't have to | |
5137 | be copied because they are already in place. This is done | |
5138 | because we can avoid calling update_window_line in this | |
5139 | case. */ | |
5140 | for (j = 0; j < nruns && runs[j]->height > run->height; ++j) | |
5141 | ; | |
2b4ec4d7 | 5142 | for (k = nruns; k > j; --k) |
5f5c8ee5 GM |
5143 | runs[k] = runs[k - 1]; |
5144 | runs[j] = run; | |
5145 | ++nruns; | |
5146 | ||
5147 | i += run->nrows; | |
5148 | } | |
5149 | else | |
5150 | ++i; | |
4588ec20 | 5151 | |
5f5c8ee5 GM |
5152 | /* Do the moves. Do it in a way that we don't overwrite something |
5153 | we want to copy later on. This is not solvable in general | |
5154 | because there is only one display and we don't have a way to | |
5155 | exchange areas on this display. Example: | |
4588ec20 | 5156 | |
5f5c8ee5 GM |
5157 | +-----------+ +-----------+ |
5158 | | A | | B | | |
5159 | +-----------+ --> +-----------+ | |
5160 | | B | | A | | |
5161 | +-----------+ +-----------+ | |
4588ec20 | 5162 | |
5f5c8ee5 GM |
5163 | Instead, prefer bigger moves, and invalidate moves that would |
5164 | copy from where we copied to. */ | |
ea0d86af | 5165 | |
5f5c8ee5 GM |
5166 | for (i = 0; i < nruns; ++i) |
5167 | if (runs[i]->nrows > 0) | |
5168 | { | |
5169 | struct run *r = runs[i]; | |
24e86043 | 5170 | |
5f5c8ee5 GM |
5171 | /* Copy on the display. */ |
5172 | if (r->current_y != r->desired_y) | |
5173 | { | |
5174 | rif->scroll_run_hook (w, r); | |
5175 | ||
5176 | /* Invalidate runs that copy from where we copied to. */ | |
5177 | for (j = i + 1; j < nruns; ++j) | |
5178 | { | |
5179 | struct run *p = runs[j]; | |
177c0ea7 | 5180 | |
5f5c8ee5 GM |
5181 | if ((p->current_y >= r->desired_y |
5182 | && p->current_y < r->desired_y + r->height) | |
5183 | || (p->current_y + p->height >= r->desired_y | |
5184 | && (p->current_y + p->height | |
5185 | < r->desired_y + r->height))) | |
5186 | p->nrows = 0; | |
5187 | } | |
5188 | } | |
ea0d86af | 5189 | |
5f5c8ee5 GM |
5190 | /* Assign matrix rows. */ |
5191 | for (j = 0; j < r->nrows; ++j) | |
5192 | { | |
5193 | struct glyph_row *from, *to; | |
408f5064 | 5194 | int to_overlapped_p; |
e876ff42 | 5195 | |
5f5c8ee5 GM |
5196 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
5197 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 5198 | to_overlapped_p = to->overlapped_p; |
60e99293 KS |
5199 | if (!from->mode_line_p && !w->pseudo_window_p |
5200 | && (to->left_fringe_bitmap != from->left_fringe_bitmap | |
5cbd733a KS |
5201 | || to->right_fringe_bitmap != from->right_fringe_bitmap |
5202 | || to->left_fringe_face_id != from->left_fringe_face_id | |
5203 | || to->right_fringe_face_id != from->right_fringe_face_id | |
3d4a365f | 5204 | || to->overlay_arrow_bitmap != from->overlay_arrow_bitmap)) |
60e99293 | 5205 | from->redraw_fringe_bitmaps_p = 1; |
5f5c8ee5 GM |
5206 | assign_row (to, from); |
5207 | to->enabled_p = 1, from->enabled_p = 0; | |
408f5064 | 5208 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
5209 | } |
5210 | } | |
15874c59 | 5211 | |
6df5d75f GM |
5212 | /* Clear the hash table, for the next time. */ |
5213 | for (i = 0; i < row_entry_idx; ++i) | |
5214 | row_table[row_entry_pool[i].bucket] = NULL; | |
5215 | ||
ed8226ea KS |
5216 | /* Value is > 0 to indicate that we scrolled the display. */ |
5217 | return nruns; | |
5f5c8ee5 | 5218 | } |
de83c314 | 5219 | |
15874c59 | 5220 | |
4588ec20 | 5221 | \f |
5f5c8ee5 GM |
5222 | /************************************************************************ |
5223 | Frame-Based Updates | |
5224 | ************************************************************************/ | |
4588ec20 | 5225 | |
5f5c8ee5 | 5226 | /* Update the desired frame matrix of frame F. |
4588ec20 | 5227 | |
5f5c8ee5 GM |
5228 | FORCE_P non-zero means that the update should not be stopped by |
5229 | pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling | |
5230 | should not be tried. | |
5231 | ||
5232 | Value is non-zero if update was stopped due to pending input. */ | |
5233 | ||
5234 | static int | |
5235 | update_frame_1 (f, force_p, inhibit_id_p) | |
5236 | struct frame *f; | |
5237 | int force_p; | |
5238 | int inhibit_id_p; | |
4588ec20 | 5239 | { |
5f5c8ee5 GM |
5240 | /* Frame matrices to work on. */ |
5241 | struct glyph_matrix *current_matrix = f->current_matrix; | |
5242 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5243 | int i; | |
4588ec20 JB |
5244 | int pause; |
5245 | int preempt_count = baud_rate / 2400 + 1; | |
dfcf069d | 5246 | extern int input_pending; |
5f5c8ee5 GM |
5247 | |
5248 | xassert (current_matrix && desired_matrix); | |
4588ec20 | 5249 | |
c37e4889 RS |
5250 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
5251 | calculate_costs (f); | |
5252 | ||
d88c2b9e RS |
5253 | if (preempt_count <= 0) |
5254 | preempt_count = 1; | |
5255 | ||
a2130dbb KS |
5256 | #if !PERIODIC_PREEMPTION_CHECKING |
5257 | if (!force_p && detect_input_pending_ignore_squeezables ()) | |
4588ec20 JB |
5258 | { |
5259 | pause = 1; | |
5260 | goto do_pause; | |
5261 | } | |
d012c62b | 5262 | #endif |
4588ec20 | 5263 | |
5f5c8ee5 | 5264 | /* If we cannot insert/delete lines, it's no use trying it. */ |
4588ec20 | 5265 | if (!line_ins_del_ok) |
5f5c8ee5 | 5266 | inhibit_id_p = 1; |
7098a0fa | 5267 | |
efb859b4 | 5268 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
5269 | i/d line if just want cursor motion. */ |
5270 | for (i = 0; i < desired_matrix->nrows; i++) | |
5271 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
5272 | break; |
5273 | ||
5274 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
5275 | if (!inhibit_id_p && i < desired_matrix->nrows) |
5276 | force_p |= scrolling (f); | |
4588ec20 JB |
5277 | |
5278 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
5279 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
5280 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 5281 | |
5f5c8ee5 GM |
5282 | /* Now update the rest of the lines. */ |
5283 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 5284 | { |
5f5c8ee5 | 5285 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 5286 | { |
b6a65ac2 | 5287 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
5288 | { |
5289 | /* Flush out every so many lines. | |
5290 | Also flush out if likely to have more than 1k buffered | |
5291 | otherwise. I'm told that some telnet connections get | |
5292 | really screwed by more than 1k output at once. */ | |
5293 | int outq = PENDING_OUTPUT_COUNT (stdout); | |
5294 | if (outq > 900 | |
5295 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
5296 | { | |
5297 | fflush (stdout); | |
5298 | if (preempt_count == 1) | |
5299 | { | |
a41f8bed JB |
5300 | #ifdef EMACS_OUTQSIZE |
5301 | if (EMACS_OUTQSIZE (0, &outq) < 0) | |
4588ec20 | 5302 | /* Probably not a tty. Ignore the error and reset |
153a073c | 5303 | the outq count. */ |
4588ec20 JB |
5304 | outq = PENDING_OUTPUT_COUNT (stdout); |
5305 | #endif | |
5306 | outq *= 10; | |
d520f0d2 | 5307 | if (baud_rate <= outq && baud_rate > 0) |
d88c2b9e | 5308 | sleep (outq / baud_rate); |
4588ec20 JB |
5309 | } |
5310 | } | |
4588ec20 JB |
5311 | } |
5312 | ||
d012c62b KS |
5313 | #if PERIODIC_PREEMPTION_CHECKING |
5314 | if (!force_p) | |
5315 | { | |
5316 | EMACS_TIME tm, dif; | |
5317 | EMACS_GET_TIME (tm); | |
5318 | EMACS_SUB_TIME (dif, preemption_next_check, tm); | |
5319 | if (EMACS_TIME_NEG_P (dif)) | |
5320 | { | |
5321 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
5322 | if (detect_input_pending_ignore_squeezables ()) |
5323 | break; | |
d012c62b KS |
5324 | } |
5325 | } | |
5326 | #else | |
5327 | if (!force_p && (i - 1) % preempt_count == 0) | |
a2d5fca0 | 5328 | detect_input_pending_ignore_squeezables (); |
d012c62b | 5329 | #endif |
a2960116 | 5330 | |
5f5c8ee5 | 5331 | update_frame_line (f, i); |
4588ec20 | 5332 | } |
4588ec20 | 5333 | } |
177c0ea7 | 5334 | |
7df02016 | 5335 | pause = (i < FRAME_LINES (f) - 1) ? i : 0; |
4588ec20 JB |
5336 | |
5337 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
5338 | if (!pause) | |
5339 | { | |
48cf7030 | 5340 | if ((cursor_in_echo_area |
5f5c8ee5 | 5341 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 5342 | show the cursor for the message instead of for the |
5f5c8ee5 | 5343 | (now hidden) mini-buffer contents. */ |
2577053b RS |
5344 | || (EQ (minibuf_window, selected_window) |
5345 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 5346 | && !NILP (echo_area_buffer[0]))) |
2577053b | 5347 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 5348 | the active mini-buffer window. */ |
2577053b | 5349 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 5350 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 5351 | { |
7df02016 | 5352 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
5353 | int row, col; |
5354 | ||
5355 | if (cursor_in_echo_area < 0) | |
5356 | { | |
5f5c8ee5 GM |
5357 | /* Negative value of cursor_in_echo_area means put |
5358 | cursor at beginning of line. */ | |
648fa17d JB |
5359 | row = top; |
5360 | col = 0; | |
5361 | } | |
1113d9db | 5362 | else |
648fa17d | 5363 | { |
5f5c8ee5 GM |
5364 | /* Positive value of cursor_in_echo_area means put |
5365 | cursor at the end of the prompt. If the mini-buffer | |
5366 | is several lines high, find the last line that has | |
5367 | any text on it. */ | |
7df02016 | 5368 | row = FRAME_LINES (f); |
177c0ea7 | 5369 | do |
648fa17d | 5370 | { |
5f5c8ee5 GM |
5371 | --row; |
5372 | col = 0; | |
177c0ea7 | 5373 | |
5f5c8ee5 GM |
5374 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
5375 | { | |
5376 | /* Frame rows are filled up with spaces that | |
5377 | must be ignored here. */ | |
5f5c8ee5 GM |
5378 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
5379 | row); | |
5380 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
5381 | struct glyph *last = start + r->used[TEXT_AREA]; | |
5382 | ||
5383 | while (last > start | |
5384 | && (last - 1)->charpos < 0) | |
5385 | --last; | |
177c0ea7 | 5386 | |
5f5c8ee5 GM |
5387 | col = last - start; |
5388 | } | |
648fa17d JB |
5389 | } |
5390 | while (row > top && col == 0); | |
5391 | ||
6395da5c | 5392 | /* Make sure COL is not out of range. */ |
868e640e | 5393 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 5394 | { |
6395da5c | 5395 | /* If we have another row, advance cursor into it. */ |
7df02016 | 5396 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 5397 | { |
7df02016 | 5398 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
5399 | row++; |
5400 | } | |
5401 | /* Otherwise move it back in range. */ | |
5402 | else | |
868e640e | 5403 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
5404 | } |
5405 | } | |
5406 | ||
5407 | cursor_to (row, col); | |
1113d9db | 5408 | } |
4588ec20 | 5409 | else |
5f5c8ee5 GM |
5410 | { |
5411 | /* We have only one cursor on terminal frames. Use it to | |
5412 | display the cursor of the selected window. */ | |
5413 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
5414 | if (w->cursor.vpos >= 0 |
5415 | /* The cursor vpos may be temporarily out of bounds | |
5416 | in the following situation: There is one window, | |
5417 | with the cursor in the lower half of it. The window | |
5418 | is split, and a message causes a redisplay before | |
5419 | a new cursor position has been computed. */ | |
7df02016 | 5420 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
5421 | { |
5422 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
5423 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
5424 | ||
7df02016 KS |
5425 | if (INTEGERP (w->left_margin_cols)) |
5426 | x += XFASTINT (w->left_margin_cols); | |
177c0ea7 | 5427 | |
7df02016 | 5428 | /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */ |
5f5c8ee5 GM |
5429 | cursor_to (y, x); |
5430 | } | |
5431 | } | |
4588ec20 JB |
5432 | } |
5433 | ||
4588ec20 JB |
5434 | do_pause: |
5435 | ||
5f5c8ee5 | 5436 | clear_desired_matrices (f); |
4588ec20 JB |
5437 | return pause; |
5438 | } | |
5439 | ||
4588ec20 | 5440 | |
5f5c8ee5 | 5441 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 5442 | |
dfcf069d | 5443 | int |
502b9b64 | 5444 | scrolling (frame) |
5f5c8ee5 | 5445 | struct frame *frame; |
4588ec20 JB |
5446 | { |
5447 | int unchanged_at_top, unchanged_at_bottom; | |
5448 | int window_size; | |
5449 | int changed_lines; | |
7df02016 KS |
5450 | int *old_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); |
5451 | int *new_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
5452 | int *draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
5453 | int *old_draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 5454 | register int i; |
7df02016 | 5455 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
5456 | struct glyph_matrix *current_matrix = frame->current_matrix; |
5457 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 5458 | |
5f5c8ee5 GM |
5459 | if (!current_matrix) |
5460 | abort (); | |
4588ec20 | 5461 | |
5f5c8ee5 GM |
5462 | /* Compute hash codes of all the lines. Also calculate number of |
5463 | changed lines, number of unchanged lines at the beginning, and | |
5464 | number of unchanged lines at the end. */ | |
4588ec20 JB |
5465 | changed_lines = 0; |
5466 | unchanged_at_top = 0; | |
7df02016 KS |
5467 | unchanged_at_bottom = FRAME_LINES (frame); |
5468 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
5469 | { |
5470 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 5471 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 5472 | return 0; |
5f5c8ee5 GM |
5473 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
5474 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
5475 | { |
5476 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
5477 | new_hash[i] = old_hash[i]; | |
5478 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
5479 | draw_cost[i] = INFINITY; | |
5480 | } | |
4588ec20 | 5481 | else |
f188b3c4 | 5482 | { |
5f5c8ee5 GM |
5483 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
5484 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 5485 | } |
4588ec20 JB |
5486 | |
5487 | if (old_hash[i] != new_hash[i]) | |
5488 | { | |
5489 | changed_lines++; | |
7df02016 | 5490 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
5491 | } |
5492 | else if (i == unchanged_at_top) | |
5493 | unchanged_at_top++; | |
5f5c8ee5 | 5494 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
5495 | } |
5496 | ||
5497 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
5f5c8ee5 | 5498 | if ((!scroll_region_ok && changed_lines < baud_rate / 2400) |
7df02016 | 5499 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
5500 | return 1; |
5501 | ||
7df02016 | 5502 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
5503 | - unchanged_at_bottom); |
5504 | ||
5505 | if (scroll_region_ok) | |
5506 | free_at_end_vpos -= unchanged_at_bottom; | |
502b9b64 | 5507 | else if (memory_below_frame) |
4588ec20 JB |
5508 | free_at_end_vpos = -1; |
5509 | ||
5510 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 5511 | current frame and desired frame, don't bother with i/d calc. */ |
190bb91a | 5512 | if (!scroll_region_ok && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
5513 | && (window_size >= |
5514 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 5515 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
5516 | old_hash, new_hash, draw_cost))) |
5517 | return 0; | |
5518 | ||
5f5c8ee5 GM |
5519 | if (window_size < 2) |
5520 | return 0; | |
5521 | ||
502b9b64 | 5522 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 5523 | draw_cost + unchanged_at_top - 1, |
190bb91a | 5524 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
5525 | old_hash + unchanged_at_top - 1, |
5526 | new_hash + unchanged_at_top - 1, | |
5527 | free_at_end_vpos - unchanged_at_top); | |
5528 | ||
5529 | return 0; | |
5530 | } | |
4588ec20 | 5531 | |
4588ec20 | 5532 | |
5f5c8ee5 GM |
5533 | /* Count the number of blanks at the start of the vector of glyphs R |
5534 | which is LEN glyphs long. */ | |
4588ec20 | 5535 | |
4588ec20 | 5536 | static int |
5f5c8ee5 GM |
5537 | count_blanks (r, len) |
5538 | struct glyph *r; | |
5539 | int len; | |
4588ec20 | 5540 | { |
5f5c8ee5 | 5541 | int i; |
177c0ea7 | 5542 | |
5f5c8ee5 GM |
5543 | for (i = 0; i < len; ++i) |
5544 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
5545 | break; | |
5546 | ||
5547 | return i; | |
4588ec20 JB |
5548 | } |
5549 | ||
5f5c8ee5 GM |
5550 | |
5551 | /* Count the number of glyphs in common at the start of the glyph | |
5552 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
5553 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
5554 | ||
4588ec20 | 5555 | static int |
5f5c8ee5 GM |
5556 | count_match (str1, end1, str2, end2) |
5557 | struct glyph *str1, *end1, *str2, *end2; | |
4588ec20 | 5558 | { |
5f5c8ee5 GM |
5559 | struct glyph *p1 = str1; |
5560 | struct glyph *p2 = str2; | |
177c0ea7 | 5561 | |
5f5c8ee5 GM |
5562 | while (p1 < end1 |
5563 | && p2 < end2 | |
42186983 | 5564 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 5565 | ++p1, ++p2; |
177c0ea7 | 5566 | |
5f5c8ee5 | 5567 | return p1 - str1; |
4588ec20 JB |
5568 | } |
5569 | ||
5f5c8ee5 | 5570 | |
4588ec20 | 5571 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 5572 | |
5f5c8ee5 | 5573 | extern int *char_ins_del_vector; |
7df02016 | 5574 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))]) |
4588ec20 | 5575 | |
5f5c8ee5 GM |
5576 | |
5577 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
5578 | ||
4588ec20 | 5579 | static void |
c363a1d6 GM |
5580 | update_frame_line (f, vpos) |
5581 | struct frame *f; | |
4588ec20 JB |
5582 | int vpos; |
5583 | { | |
5f5c8ee5 | 5584 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
5585 | int tem; |
5586 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
5587 | struct glyph_matrix *current_matrix = f->current_matrix; |
5588 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
5589 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
5590 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
5591 | int must_write_whole_line_p; | |
0a894bad | 5592 | int write_spaces_p = must_write_spaces; |
c363a1d6 | 5593 | int colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background |
0a894bad GM |
5594 | != FACE_TTY_DEFAULT_BG_COLOR); |
5595 | ||
5596 | if (colored_spaces_p) | |
5597 | write_spaces_p = 1; | |
5f5c8ee5 | 5598 | |
26c63686 GM |
5599 | /* Current row not enabled means it has unknown contents. We must |
5600 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
5601 | must_write_whole_line_p = !current_row->enabled_p; |
5602 | if (must_write_whole_line_p) | |
4588ec20 | 5603 | { |
5f5c8ee5 | 5604 | obody = 0; |
4588ec20 JB |
5605 | olen = 0; |
5606 | } | |
5607 | else | |
5608 | { | |
5f5c8ee5 GM |
5609 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
5610 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 5611 | |
4cecaab8 MB |
5612 | /* Ignore trailing spaces, if we can. */ |
5613 | if (!write_spaces_p) | |
5614 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
5615 | olen--; | |
4588ec20 JB |
5616 | } |
5617 | ||
5f5c8ee5 GM |
5618 | current_row->enabled_p = 1; |
5619 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 5620 | |
5f5c8ee5 GM |
5621 | /* If desired line is empty, just clear the line. */ |
5622 | if (!desired_row->enabled_p) | |
4588ec20 JB |
5623 | { |
5624 | nlen = 0; | |
5625 | goto just_erase; | |
5626 | } | |
5627 | ||
5f5c8ee5 GM |
5628 | nbody = desired_row->glyphs[TEXT_AREA]; |
5629 | nlen = desired_row->used[TEXT_AREA]; | |
5630 | nend = nbody + nlen; | |
5631 | ||
5632 | /* If display line has unknown contents, write the whole line. */ | |
5633 | if (must_write_whole_line_p) | |
5634 | { | |
26c63686 | 5635 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 5636 | if (!write_spaces_p) |
74ca462f GM |
5637 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
5638 | --nlen; | |
5639 | ||
26c63686 | 5640 | /* Write the contents of the desired line. */ |
74ca462f | 5641 | if (nlen) |
26c63686 GM |
5642 | { |
5643 | cursor_to (vpos, 0); | |
5644 | write_glyphs (nbody, nlen); | |
5645 | } | |
177c0ea7 | 5646 | |
26c63686 GM |
5647 | /* Don't call clear_end_of_line if we already wrote the whole |
5648 | line. The cursor will not be at the right margin in that | |
5649 | case but in the line below. */ | |
7df02016 | 5650 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 GM |
5651 | { |
5652 | cursor_to (vpos, nlen); | |
7df02016 | 5653 | clear_end_of_line (FRAME_TOTAL_COLS (f)); |
26c63686 | 5654 | } |
58827478 GM |
5655 | else |
5656 | /* Make sure we are in the right row, otherwise cursor movement | |
5657 | with cmgoto might use `ch' in the wrong row. */ | |
5658 | cursor_to (vpos, 0); | |
177c0ea7 | 5659 | |
5f5c8ee5 GM |
5660 | make_current (desired_matrix, current_matrix, vpos); |
5661 | return; | |
5662 | } | |
4588ec20 JB |
5663 | |
5664 | /* Pretend trailing spaces are not there at all, | |
5665 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
5666 | if (!write_spaces_p) |
5667 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
5668 | nlen--; | |
4588ec20 JB |
5669 | |
5670 | /* If there's no i/d char, quickly do the best we can without it. */ | |
5671 | if (!char_ins_del_ok) | |
5672 | { | |
5f5c8ee5 | 5673 | int i, j; |
4588ec20 | 5674 | |
5f5c8ee5 GM |
5675 | /* Find the first glyph in desired row that doesn't agree with |
5676 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
5677 | for (i = 0; i < nlen; i++) |
5678 | { | |
5f5c8ee5 | 5679 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 5680 | { |
5f5c8ee5 GM |
5681 | /* Find the end of the run of different glyphs. */ |
5682 | j = i + 1; | |
5683 | while (j < nlen | |
5684 | && (j >= olen | |
5685 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
5686 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
5687 | ++j; | |
177c0ea7 JB |
5688 | |
5689 | /* Output this run of non-matching chars. */ | |
5f5c8ee5 GM |
5690 | cursor_to (vpos, i); |
5691 | write_glyphs (nbody + i, j - i); | |
5692 | i = j - 1; | |
4588ec20 JB |
5693 | |
5694 | /* Now find the next non-match. */ | |
5695 | } | |
5696 | } | |
5697 | ||
5698 | /* Clear the rest of the line, or the non-clear part of it. */ | |
5699 | if (olen > nlen) | |
5700 | { | |
5701 | cursor_to (vpos, nlen); | |
5702 | clear_end_of_line (olen); | |
5703 | } | |
5704 | ||
5f5c8ee5 GM |
5705 | /* Make current row = desired row. */ |
5706 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
5707 | return; |
5708 | } | |
5709 | ||
5f5c8ee5 GM |
5710 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
5711 | characters in a row. */ | |
5712 | ||
4588ec20 JB |
5713 | if (!olen) |
5714 | { | |
5f5c8ee5 GM |
5715 | /* If current line is blank, skip over initial spaces, if |
5716 | possible, and write the rest. */ | |
4cecaab8 | 5717 | if (write_spaces_p) |
5f5c8ee5 GM |
5718 | nsp = 0; |
5719 | else | |
5720 | nsp = count_blanks (nbody, nlen); | |
5721 | ||
4588ec20 JB |
5722 | if (nlen > nsp) |
5723 | { | |
5724 | cursor_to (vpos, nsp); | |
5725 | write_glyphs (nbody + nsp, nlen - nsp); | |
5726 | } | |
5727 | ||
502b9b64 | 5728 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 5729 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
5730 | return; |
5731 | } | |
5732 | ||
4588ec20 | 5733 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 5734 | osp = count_blanks (obody, olen); |
4cecaab8 | 5735 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 5736 | |
5f5c8ee5 GM |
5737 | /* Compute number of matching chars starting with first non-blank. */ |
5738 | begmatch = count_match (obody + osp, obody + olen, | |
5739 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
5740 | |
5741 | /* Spaces in new match implicit space past the end of old. */ | |
5742 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 5743 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
5744 | { |
5745 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
5746 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
5747 | ++begmatch; | |
4588ec20 JB |
5748 | } |
5749 | ||
5750 | /* Avoid doing insert/delete char | |
5751 | just cause number of leading spaces differs | |
5f5c8ee5 | 5752 | when the following text does not match. */ |
4588ec20 JB |
5753 | if (begmatch == 0 && osp != nsp) |
5754 | osp = nsp = min (osp, nsp); | |
5755 | ||
5756 | /* Find matching characters at end of line */ | |
5757 | op1 = obody + olen; | |
5758 | np1 = nbody + nlen; | |
5759 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
5760 | while (op1 > op2 |
5761 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
5762 | { |
5763 | op1--; | |
5764 | np1--; | |
5765 | } | |
5766 | endmatch = obody + olen - op1; | |
5767 | ||
4588ec20 JB |
5768 | /* tem gets the distance to insert or delete. |
5769 | endmatch is how many characters we save by doing so. | |
5770 | Is it worth it? */ | |
5771 | ||
5772 | tem = (nlen - nsp) - (olen - osp); | |
5773 | if (endmatch && tem | |
c363a1d6 | 5774 | && (!char_ins_del_ok || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
5775 | endmatch = 0; |
5776 | ||
5777 | /* nsp - osp is the distance to insert or delete. | |
5778 | If that is nonzero, begmatch is known to be nonzero also. | |
5779 | begmatch + endmatch is how much we save by doing the ins/del. | |
5780 | Is it worth it? */ | |
5781 | ||
5782 | if (nsp != osp | |
5783 | && (!char_ins_del_ok | |
c363a1d6 | 5784 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
5785 | { |
5786 | begmatch = 0; | |
5787 | endmatch = 0; | |
5788 | osp = nsp = min (osp, nsp); | |
5789 | } | |
5790 | ||
5791 | /* Now go through the line, inserting, writing and | |
5792 | deleting as appropriate. */ | |
5793 | ||
5794 | if (osp > nsp) | |
5795 | { | |
5796 | cursor_to (vpos, nsp); | |
5797 | delete_glyphs (osp - nsp); | |
5798 | } | |
5799 | else if (nsp > osp) | |
5800 | { | |
5801 | /* If going to delete chars later in line | |
5802 | and insert earlier in the line, | |
5803 | must delete first to avoid losing data in the insert */ | |
5804 | if (endmatch && nlen < olen + nsp - osp) | |
5805 | { | |
5806 | cursor_to (vpos, nlen - endmatch + osp - nsp); | |
5807 | delete_glyphs (olen + nsp - osp - nlen); | |
5808 | olen = nlen - (nsp - osp); | |
5809 | } | |
5810 | cursor_to (vpos, osp); | |
5f5c8ee5 | 5811 | insert_glyphs (0, nsp - osp); |
4588ec20 JB |
5812 | } |
5813 | olen += nsp - osp; | |
5814 | ||
5815 | tem = nsp + begmatch + endmatch; | |
5816 | if (nlen != tem || olen != tem) | |
5817 | { | |
4588ec20 JB |
5818 | if (!endmatch || nlen == olen) |
5819 | { | |
c363a1d6 GM |
5820 | /* If new text being written reaches right margin, there is |
5821 | no need to do clear-to-eol at the end of this function | |
5822 | (and it would not be safe, since cursor is not going to | |
5823 | be "at the margin" after the text is done). */ | |
7df02016 | 5824 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 5825 | olen = 0; |
c363a1d6 GM |
5826 | |
5827 | /* Function write_glyphs is prepared to do nothing | |
5828 | if passed a length <= 0. Check it here to avoid | |
5829 | unnecessary cursor movement. */ | |
5830 | if (nlen - tem > 0) | |
5831 | { | |
5832 | cursor_to (vpos, nsp + begmatch); | |
5833 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
5834 | } | |
4588ec20 JB |
5835 | } |
5836 | else if (nlen > olen) | |
5837 | { | |
24e86043 KH |
5838 | /* Here, we used to have the following simple code: |
5839 | ---------------------------------------- | |
5840 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
5841 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
5842 | ---------------------------------------- | |
5843 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
5844 | is a padding glyph. */ | |
5845 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
5846 | int del; | |
5f5c8ee5 | 5847 | |
c363a1d6 | 5848 | cursor_to (vpos, nsp + begmatch); |
177c0ea7 | 5849 | |
5f5c8ee5 | 5850 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
5851 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
5852 | out--; | |
5f5c8ee5 | 5853 | write_glyphs (nbody + nsp + begmatch, out); |
177c0ea7 | 5854 | |
5f5c8ee5 GM |
5855 | /* If we left columns to be overwritten, we must delete them. */ |
5856 | del = olen - tem - out; | |
c363a1d6 GM |
5857 | if (del > 0) |
5858 | delete_glyphs (del); | |
177c0ea7 | 5859 | |
5f5c8ee5 GM |
5860 | /* At last, we insert columns not yet written out. */ |
5861 | insert_glyphs (nbody + nsp + begmatch + out, nlen - olen + del); | |
5862 | olen = nlen; | |
5863 | } | |
5864 | else if (olen > nlen) | |
5865 | { | |
c363a1d6 | 5866 | cursor_to (vpos, nsp + begmatch); |
5f5c8ee5 GM |
5867 | write_glyphs (nbody + nsp + begmatch, nlen - tem); |
5868 | delete_glyphs (olen - nlen); | |
5869 | olen = nlen; | |
5870 | } | |
bd9e3e75 | 5871 | } |
5f5c8ee5 GM |
5872 | |
5873 | just_erase: | |
5874 | /* If any unerased characters remain after the new line, erase them. */ | |
5875 | if (olen > nlen) | |
078b3696 | 5876 | { |
5f5c8ee5 GM |
5877 | cursor_to (vpos, nlen); |
5878 | clear_end_of_line (olen); | |
078b3696 | 5879 | } |
5f5c8ee5 GM |
5880 | |
5881 | /* Exchange contents between current_frame and new_frame. */ | |
5882 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5883 | } |
5f5c8ee5 GM |
5884 | |
5885 | ||
078b3696 | 5886 | \f |
5f5c8ee5 GM |
5887 | /*********************************************************************** |
5888 | X/Y Position -> Buffer Position | |
5889 | ***********************************************************************/ | |
5890 | ||
a1b0a6db | 5891 | /* Determine what's under window-relative pixel position (*X, *Y). |
6a3d9c9f KS |
5892 | Return the object (string or buffer) that's there. |
5893 | Return in *POS the position in that object. | |
5894 | Adjust *X and *Y to character positions. */ | |
5f5c8ee5 | 5895 | |
6a3d9c9f KS |
5896 | Lisp_Object |
5897 | buffer_posn_from_coords (w, x, y, pos, object, dx, dy, width, height) | |
5f5c8ee5 GM |
5898 | struct window *w; |
5899 | int *x, *y; | |
a1b0a6db | 5900 | struct display_pos *pos; |
6a3d9c9f KS |
5901 | Lisp_Object *object; |
5902 | int *dx, *dy; | |
5903 | int *width, *height; | |
4588ec20 | 5904 | { |
5f5c8ee5 GM |
5905 | struct it it; |
5906 | struct buffer *old_current_buffer = current_buffer; | |
5907 | struct text_pos startp; | |
6a3d9c9f KS |
5908 | Lisp_Object string; |
5909 | struct glyph_row *row; | |
cedd7cd9 KS |
5910 | #ifdef HAVE_WINDOW_SYSTEM |
5911 | struct image *img = 0; | |
5912 | #endif | |
ba922d0c | 5913 | int x0, x1; |
5f5c8ee5 GM |
5914 | |
5915 | current_buffer = XBUFFER (w->buffer); | |
5916 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
5917 | CHARPOS (startp) = min (ZV, max (BEGV, CHARPOS (startp))); | |
5918 | BYTEPOS (startp) = min (ZV_BYTE, max (BEGV_BYTE, BYTEPOS (startp))); | |
5919 | start_display (&it, w, startp); | |
177c0ea7 | 5920 | |
ba922d0c KS |
5921 | x0 = *x - WINDOW_LEFT_MARGIN_WIDTH (w); |
5922 | move_it_to (&it, -1, x0 + it.first_visible_x, *y, -1, | |
5f5c8ee5 | 5923 | MOVE_TO_X | MOVE_TO_Y); |
177c0ea7 | 5924 | |
5f5c8ee5 | 5925 | current_buffer = old_current_buffer; |
a1b0a6db | 5926 | |
2d4aac37 KS |
5927 | *dx = x0 + it.first_visible_x - it.current_x; |
5928 | *dy = *y - it.current_y; | |
5929 | ||
6a3d9c9f KS |
5930 | string = w->buffer; |
5931 | if (STRINGP (it.string)) | |
5932 | string = it.string; | |
5933 | *pos = it.current; | |
60bf1629 | 5934 | |
019b1f0e | 5935 | #ifdef HAVE_WINDOW_SYSTEM |
60bf1629 KS |
5936 | if (it.what == IT_IMAGE) |
5937 | { | |
60bf1629 KS |
5938 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5939 | && !NILP (img->spec)) | |
6a3d9c9f KS |
5940 | *object = img->spec; |
5941 | } | |
5942 | #endif | |
60bf1629 | 5943 | |
b70d98e1 KS |
5944 | if (it.vpos < w->current_matrix->nrows |
5945 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5946 | row->enabled_p)) | |
6a3d9c9f KS |
5947 | { |
5948 | if (it.hpos < row->used[TEXT_AREA]) | |
5949 | { | |
5950 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6a3d9c9f | 5951 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5952 | if (img) |
5953 | { | |
5954 | *dy -= row->ascent - glyph->ascent; | |
5955 | *dx += glyph->slice.x; | |
5956 | *dy += glyph->slice.y; | |
5957 | /* Image slices positions are still relative to the entire image */ | |
5958 | *width = img->width; | |
5959 | *height = img->height; | |
5960 | } | |
5961 | else | |
6a3d9c9f | 5962 | #endif |
cedd7cd9 KS |
5963 | { |
5964 | *width = glyph->pixel_width; | |
5965 | *height = glyph->ascent + glyph->descent; | |
5966 | } | |
6a3d9c9f KS |
5967 | } |
5968 | else | |
5969 | { | |
5970 | *width = 0; | |
5971 | *height = row->height; | |
60bf1629 KS |
5972 | } |
5973 | } | |
2d4aac37 | 5974 | else |
6a3d9c9f KS |
5975 | { |
5976 | *width = *height = 0; | |
5977 | } | |
60bf1629 KS |
5978 | |
5979 | /* Add extra (default width) columns if clicked after EOL. */ | |
5980 | x1 = max(0, it.current_x + it.pixel_width - it.first_visible_x); | |
5981 | if (x0 > x1) | |
5982 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5983 | ||
ba922d0c KS |
5984 | *x = it.hpos; |
5985 | *y = it.vpos; | |
6a3d9c9f KS |
5986 | |
5987 | return string; | |
5f5c8ee5 | 5988 | } |
4588ec20 | 5989 | |
5f5c8ee5 GM |
5990 | |
5991 | /* Value is the string under window-relative coordinates X/Y in the | |
6a3d9c9f KS |
5992 | mode line or header line (PART says which) of window W, or nil if none. |
5993 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
5994 | |
5995 | Lisp_Object | |
6a3d9c9f | 5996 | mode_line_string (w, part, x, y, charpos, object, dx, dy, width, height) |
5f5c8ee5 | 5997 | struct window *w; |
641bdbf3 | 5998 | enum window_part part; |
6a3d9c9f | 5999 | int *x, *y; |
5f5c8ee5 | 6000 | int *charpos; |
6a3d9c9f KS |
6001 | Lisp_Object *object; |
6002 | int *dx, *dy; | |
6003 | int *width, *height; | |
5f5c8ee5 GM |
6004 | { |
6005 | struct glyph_row *row; | |
6006 | struct glyph *glyph, *end; | |
2d4aac37 | 6007 | int x0, y0; |
5f5c8ee5 GM |
6008 | Lisp_Object string = Qnil; |
6009 | ||
641bdbf3 | 6010 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
6011 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
6012 | else | |
045dee35 | 6013 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
2d4aac37 | 6014 | y0 = *y - row->y; |
ba922d0c KS |
6015 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); |
6016 | ||
5f5c8ee5 | 6017 | if (row->mode_line_p && row->enabled_p) |
4588ec20 | 6018 | { |
5f5c8ee5 GM |
6019 | /* Find the glyph under X. If we find one with a string object, |
6020 | it's the one we were looking for. */ | |
6021 | glyph = row->glyphs[TEXT_AREA]; | |
6022 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 6023 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
ba922d0c KS |
6024 | x0 -= glyph->pixel_width; |
6025 | *x = glyph - row->glyphs[TEXT_AREA]; | |
6026 | if (glyph < end) | |
6027 | { | |
6028 | string = glyph->object; | |
6029 | *charpos = glyph->charpos; | |
6a3d9c9f KS |
6030 | *width = glyph->pixel_width; |
6031 | *height = glyph->ascent + glyph->descent; | |
6032 | #ifdef HAVE_WINDOW_SYSTEM | |
6033 | if (glyph->type == IMAGE_GLYPH) | |
6034 | { | |
6035 | struct image *img; | |
6036 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
6037 | if (img != NULL) | |
6038 | *object = img->spec; | |
6039 | y0 -= row->ascent - glyph->ascent; | |
6040 | } | |
6041 | #endif | |
ba922d0c KS |
6042 | } |
6043 | else | |
6a3d9c9f KS |
6044 | { |
6045 | /* Add extra (default width) columns if clicked after EOL. */ | |
6046 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
6047 | *width = 0; | |
6048 | *height = row->height; | |
6049 | } | |
4588ec20 | 6050 | } |
ba922d0c | 6051 | else |
2d4aac37 KS |
6052 | { |
6053 | *x = 0; | |
6054 | x0 = 0; | |
6a3d9c9f | 6055 | *width = *height = 0; |
2d4aac37 KS |
6056 | } |
6057 | ||
6a3d9c9f KS |
6058 | *dx = x0; |
6059 | *dy = y0; | |
5f5c8ee5 GM |
6060 | |
6061 | return string; | |
4588ec20 | 6062 | } |
5f5c8ee5 GM |
6063 | |
6064 | ||
db1db309 GM |
6065 | /* Value is the string under window-relative coordinates X/Y in either |
6066 | marginal area, or nil if none. *CHARPOS is set to the position in | |
6067 | the string returned. */ | |
6068 | ||
6069 | Lisp_Object | |
6a3d9c9f | 6070 | marginal_area_string (w, part, x, y, charpos, object, dx, dy, width, height) |
db1db309 | 6071 | struct window *w; |
641bdbf3 | 6072 | enum window_part part; |
6a3d9c9f | 6073 | int *x, *y; |
521069b9 | 6074 | int *charpos; |
6a3d9c9f KS |
6075 | Lisp_Object *object; |
6076 | int *dx, *dy; | |
6077 | int *width, *height; | |
db1db309 GM |
6078 | { |
6079 | struct glyph_row *row = w->current_matrix->rows; | |
6080 | struct glyph *glyph, *end; | |
2d4aac37 | 6081 | int x0, y0, i, wy = *y; |
641bdbf3 | 6082 | int area; |
db1db309 GM |
6083 | Lisp_Object string = Qnil; |
6084 | ||
641bdbf3 | 6085 | if (part == ON_LEFT_MARGIN) |
db1db309 | 6086 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 6087 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
6088 | area = RIGHT_MARGIN_AREA; |
6089 | else | |
6090 | abort (); | |
6091 | ||
6092 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
6093 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
6094 | break; | |
2d4aac37 | 6095 | y0 = *y - row->y; |
ba922d0c | 6096 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); |
db1db309 GM |
6097 | |
6098 | if (row->enabled_p) | |
6099 | { | |
6100 | /* Find the glyph under X. If we find one with a string object, | |
6101 | it's the one we were looking for. */ | |
db1db309 | 6102 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 6103 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
ed8226ea | 6104 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
6105 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) |
6106 | + window_box_width (w, LEFT_MARGIN_AREA) | |
6107 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 6108 | else |
7df02016 | 6109 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
ed8226ea | 6110 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
6111 | : 0); |
6112 | ||
ba922d0c KS |
6113 | glyph = row->glyphs[area]; |
6114 | end = glyph + row->used[area]; | |
cfde341f | 6115 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
ba922d0c KS |
6116 | x0 -= glyph->pixel_width; |
6117 | *x = glyph - row->glyphs[area]; | |
6118 | if (glyph < end) | |
6119 | { | |
6120 | string = glyph->object; | |
6121 | *charpos = glyph->charpos; | |
6a3d9c9f KS |
6122 | *width = glyph->pixel_width; |
6123 | *height = glyph->ascent + glyph->descent; | |
60bf1629 KS |
6124 | #ifdef HAVE_WINDOW_SYSTEM |
6125 | if (glyph->type == IMAGE_GLYPH) | |
6126 | { | |
6127 | struct image *img; | |
6128 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
6129 | if (img != NULL) | |
6a3d9c9f | 6130 | *object = img->spec; |
60bf1629 | 6131 | y0 -= row->ascent - glyph->ascent; |
cedd7cd9 KS |
6132 | x0 += glyph->slice.x; |
6133 | y0 += glyph->slice.y; | |
60bf1629 KS |
6134 | } |
6135 | #endif | |
ba922d0c KS |
6136 | } |
6137 | else | |
6a3d9c9f KS |
6138 | { |
6139 | /* Add extra (default width) columns if clicked after EOL. */ | |
6140 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
6141 | *width = 0; | |
6142 | *height = row->height; | |
6143 | } | |
db1db309 | 6144 | } |
ba922d0c | 6145 | else |
2d4aac37 KS |
6146 | { |
6147 | x0 = 0; | |
6148 | *x = 0; | |
6a3d9c9f | 6149 | *width = *height = 0; |
2d4aac37 KS |
6150 | } |
6151 | ||
6a3d9c9f KS |
6152 | *dx = x0; |
6153 | *dy = y0; | |
db1db309 GM |
6154 | |
6155 | return string; | |
6156 | } | |
6157 | ||
6158 | ||
5f5c8ee5 GM |
6159 | /*********************************************************************** |
6160 | Changing Frame Sizes | |
6161 | ***********************************************************************/ | |
4588ec20 JB |
6162 | |
6163 | #ifdef SIGWINCH | |
5f5c8ee5 | 6164 | |
efb859b4 | 6165 | SIGTYPE |
61cbef47 | 6166 | window_change_signal (signalnum) /* If we don't have an argument, */ |
5f5c8ee5 | 6167 | int signalnum; /* some compilers complain in signal calls. */ |
4588ec20 JB |
6168 | { |
6169 | int width, height; | |
d43721a2 | 6170 | #ifndef USE_CRT_DLL |
4588ec20 | 6171 | extern int errno; |
d43721a2 | 6172 | #endif |
4588ec20 JB |
6173 | int old_errno = errno; |
6174 | ||
333f1b6f JD |
6175 | signal (SIGWINCH, window_change_signal); |
6176 | SIGNAL_THREAD_CHECK (signalnum); | |
6177 | ||
502b9b64 | 6178 | get_frame_size (&width, &height); |
4588ec20 | 6179 | |
502b9b64 JB |
6180 | /* The frame size change obviously applies to a termcap-controlled |
6181 | frame. Find such a frame in the list, and assume it's the only | |
4588ec20 | 6182 | one (since the redisplay code always writes to stdout, not a |
502b9b64 | 6183 | FILE * specified in the frame structure). Record the new size, |
4588ec20 JB |
6184 | but don't reallocate the data structures now. Let that be done |
6185 | later outside of the signal handler. */ | |
6186 | ||
6187 | { | |
35f56f96 | 6188 | Lisp_Object tail, frame; |
4588ec20 | 6189 | |
35f56f96 | 6190 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 6191 | { |
35f56f96 | 6192 | if (FRAME_TERMCAP_P (XFRAME (frame))) |
4588ec20 | 6193 | { |
b96fd3e8 | 6194 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); |
4588ec20 JB |
6195 | break; |
6196 | } | |
6197 | } | |
6198 | } | |
6199 | ||
4588ec20 JB |
6200 | errno = old_errno; |
6201 | } | |
6202 | #endif /* SIGWINCH */ | |
6203 | ||
6204 | ||
b96fd3e8 GM |
6205 | /* Do any change in frame size that was requested by a signal. SAFE |
6206 | non-zero means this function is called from a place where it is | |
6207 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 6208 | |
dfcf069d | 6209 | void |
b96fd3e8 GM |
6210 | do_pending_window_change (safe) |
6211 | int safe; | |
4588ec20 JB |
6212 | { |
6213 | /* If window_change_signal should have run before, run it now. */ | |
b96fd3e8 GM |
6214 | if (redisplaying_p && !safe) |
6215 | return; | |
177c0ea7 | 6216 | |
4588ec20 JB |
6217 | while (delayed_size_change) |
6218 | { | |
35f56f96 | 6219 | Lisp_Object tail, frame; |
4588ec20 JB |
6220 | |
6221 | delayed_size_change = 0; | |
6222 | ||
35f56f96 | 6223 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 6224 | { |
5f5c8ee5 | 6225 | struct frame *f = XFRAME (frame); |
35f56f96 | 6226 | |
7df02016 KS |
6227 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
6228 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
6229 | 0, 0, safe); | |
4588ec20 JB |
6230 | } |
6231 | } | |
6232 | } | |
6233 | ||
6234 | ||
502b9b64 | 6235 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 6236 | indicate no change is to take place. |
4588ec20 | 6237 | |
b6a65ac2 JB |
6238 | If DELAY is non-zero, then assume we're being called from a signal |
6239 | handler, and queue the change for later - perhaps the next | |
6240 | redisplay. Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
6241 | from a signal handler. |
6242 | ||
6243 | SAFE non-zero means this function is called from a place where it's | |
6244 | safe to change frame sizes while a redisplay is in progress. */ | |
b6a65ac2 | 6245 | |
dfcf069d | 6246 | void |
b96fd3e8 | 6247 | change_frame_size (f, newheight, newwidth, pretend, delay, safe) |
5f5c8ee5 | 6248 | register struct frame *f; |
b96fd3e8 | 6249 | int newheight, newwidth, pretend, delay, safe; |
45140e01 RS |
6250 | { |
6251 | Lisp_Object tail, frame; | |
3826ea1a | 6252 | |
8a376b3b | 6253 | if (! FRAME_WINDOW_P (f)) |
45140e01 | 6254 | { |
93e54836 RS |
6255 | /* When using termcap, or on MS-DOS, all frames use |
6256 | the same screen, so a change in size affects all frames. */ | |
45140e01 | 6257 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 6258 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 6259 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 6260 | pretend, delay, safe); |
45140e01 RS |
6261 | } |
6262 | else | |
b96fd3e8 | 6263 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
6264 | } |
6265 | ||
6266 | static void | |
b96fd3e8 | 6267 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe) |
5f5c8ee5 | 6268 | register struct frame *f; |
b96fd3e8 | 6269 | int newheight, newwidth, pretend, delay, safe; |
4588ec20 | 6270 | { |
7df02016 | 6271 | int new_frame_total_cols; |
aed13378 | 6272 | int count = SPECPDL_INDEX (); |
3826ea1a | 6273 | |
4588ec20 | 6274 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 6275 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 6276 | { |
7df02016 KS |
6277 | f->new_text_lines = newheight; |
6278 | f->new_text_cols = newwidth; | |
4588ec20 JB |
6279 | delayed_size_change = 1; |
6280 | return; | |
6281 | } | |
6282 | ||
502b9b64 | 6283 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
6284 | f->new_text_lines = 0; |
6285 | f->new_text_cols = 0; | |
b6a65ac2 | 6286 | |
08f7aa3e | 6287 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 6288 | if (newheight == 0) |
7df02016 | 6289 | newheight = FRAME_LINES (f); |
ae19c6f2 | 6290 | if (newwidth == 0) |
7df02016 | 6291 | newwidth = FRAME_COLS (f); |
3826ea1a | 6292 | |
5f5c8ee5 GM |
6293 | /* Compute width of windows in F. |
6294 | This is the width of the frame without vertical scroll bars. */ | |
7df02016 | 6295 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); |
3826ea1a | 6296 | |
b6a65ac2 | 6297 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 6298 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 JB |
6299 | |
6300 | /* If we're not changing the frame size, quit now. */ | |
7df02016 KS |
6301 | if (newheight == FRAME_LINES (f) |
6302 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) | |
4588ec20 JB |
6303 | return; |
6304 | ||
cbb95688 RS |
6305 | BLOCK_INPUT; |
6306 | ||
886a8a6c KH |
6307 | #ifdef MSDOS |
6308 | /* We only can set screen dimensions to certain values supported | |
6309 | by our video hardware. Try to find the smallest size greater | |
6310 | or equal to the requested dimensions. */ | |
6311 | dos_set_window_size (&newheight, &newwidth); | |
6312 | #endif | |
6313 | ||
7df02016 | 6314 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 6315 | { |
5f5c8ee5 | 6316 | if (FRAME_HAS_MINIBUF_P (f) && !FRAME_MINIBUF_ONLY_P (f)) |
4588ec20 | 6317 | { |
5f5c8ee5 | 6318 | /* Frame has both root and mini-buffer. */ |
7df02016 | 6319 | XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f))->top_line, |
5f5c8ee5 GM |
6320 | FRAME_TOP_MARGIN (f)); |
6321 | set_window_height (FRAME_ROOT_WINDOW (f), | |
6322 | (newheight | |
6323 | - 1 | |
6324 | - FRAME_TOP_MARGIN (f)), | |
6325 | 0); | |
7df02016 | 6326 | XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top_line, |
a5d8b611 | 6327 | newheight - 1); |
5f5c8ee5 | 6328 | set_window_height (FRAME_MINIBUF_WINDOW (f), 1, 0); |
4588ec20 JB |
6329 | } |
6330 | else | |
502b9b64 | 6331 | /* Frame has just one top-level window. */ |
5f5c8ee5 GM |
6332 | set_window_height (FRAME_ROOT_WINDOW (f), |
6333 | newheight - FRAME_TOP_MARGIN (f), 0); | |
b6a65ac2 | 6334 | |
5f5c8ee5 | 6335 | if (FRAME_TERMCAP_P (f) && !pretend) |
b6a65ac2 | 6336 | FrameRows = newheight; |
4588ec20 JB |
6337 | } |
6338 | ||
7df02016 | 6339 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 6340 | { |
7df02016 | 6341 | set_window_width (FRAME_ROOT_WINDOW (f), new_frame_total_cols, 0); |
5f5c8ee5 | 6342 | if (FRAME_HAS_MINIBUF_P (f)) |
7df02016 | 6343 | set_window_width (FRAME_MINIBUF_WINDOW (f), new_frame_total_cols, 0); |
4588ec20 | 6344 | |
5f5c8ee5 | 6345 | if (FRAME_TERMCAP_P (f) && !pretend) |
502b9b64 | 6346 | FrameCols = newwidth; |
5f5c8ee5 | 6347 | |
9ea173e8 | 6348 | if (WINDOWP (f->tool_bar_window)) |
7df02016 | 6349 | XSETFASTINT (XWINDOW (f->tool_bar_window)->total_cols, newwidth); |
4588ec20 JB |
6350 | } |
6351 | ||
7df02016 KS |
6352 | FRAME_LINES (f) = newheight; |
6353 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 6354 | |
5f5c8ee5 GM |
6355 | { |
6356 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
6357 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 6358 | |
5f5c8ee5 GM |
6359 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
6360 | &text_area_height); | |
6361 | if (w->cursor.x >= text_area_x + text_area_width) | |
6362 | w->cursor.hpos = w->cursor.x = 0; | |
6363 | if (w->cursor.y >= text_area_y + text_area_height) | |
6364 | w->cursor.vpos = w->cursor.y = 0; | |
6365 | } | |
986e61b8 | 6366 | |
5f5c8ee5 | 6367 | adjust_glyphs (f); |
5f5c8ee5 | 6368 | calculate_costs (f); |
cb02fa39 GM |
6369 | SET_FRAME_GARBAGED (f); |
6370 | f->resized_p = 1; | |
97cf50e7 RS |
6371 | |
6372 | UNBLOCK_INPUT; | |
61730a69 | 6373 | |
e523f7e5 RS |
6374 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); |
6375 | ||
61730a69 | 6376 | /* This isn't quite a no-op: it runs window-configuration-change-hook. */ |
5f5c8ee5 | 6377 | Fset_window_buffer (FRAME_SELECTED_WINDOW (f), |
7df02016 | 6378 | XWINDOW (FRAME_SELECTED_WINDOW (f))->buffer, Qt); |
e523f7e5 RS |
6379 | |
6380 | unbind_to (count, Qnil); | |
4588ec20 | 6381 | } |
5f5c8ee5 GM |
6382 | |
6383 | ||
4588ec20 | 6384 | \f |
5f5c8ee5 GM |
6385 | /*********************************************************************** |
6386 | Terminal Related Lisp Functions | |
6387 | ***********************************************************************/ | |
6388 | ||
6389 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 6390 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
6391 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
6392 | FILE = nil means just close any termscript file currently open. */) | |
6393 | (file) | |
5f5c8ee5 GM |
6394 | Lisp_Object file; |
6395 | { | |
2c1e4409 YM |
6396 | if (termscript != 0) |
6397 | { | |
6398 | BLOCK_INPUT; | |
6399 | fclose (termscript); | |
6400 | UNBLOCK_INPUT; | |
6401 | } | |
5f5c8ee5 GM |
6402 | termscript = 0; |
6403 | ||
6404 | if (! NILP (file)) | |
6405 | { | |
6406 | file = Fexpand_file_name (file, Qnil); | |
d5db4077 | 6407 | termscript = fopen (SDATA (file), "w"); |
5f5c8ee5 GM |
6408 | if (termscript == 0) |
6409 | report_file_error ("Opening termscript", Fcons (file, Qnil)); | |
6410 | } | |
6411 | return Qnil; | |
6412 | } | |
6413 | ||
6414 | ||
4588ec20 | 6415 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
228299fa | 6416 | Ssend_string_to_terminal, 1, 1, 0, |
7ee72033 MB |
6417 | doc: /* Send STRING to the terminal without alteration. |
6418 | Control characters in STRING will have terminal-dependent effects. */) | |
6419 | (string) | |
e912ba09 | 6420 | Lisp_Object string; |
4588ec20 | 6421 | { |
94f3db62 | 6422 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 6423 | CHECK_STRING (string); |
2c1e4409 | 6424 | BLOCK_INPUT; |
d5db4077 | 6425 | fwrite (SDATA (string), 1, SBYTES (string), stdout); |
4588ec20 JB |
6426 | fflush (stdout); |
6427 | if (termscript) | |
6428 | { | |
d5db4077 | 6429 | fwrite (SDATA (string), 1, SBYTES (string), |
fc932ac6 | 6430 | termscript); |
4588ec20 JB |
6431 | fflush (termscript); |
6432 | } | |
2c1e4409 | 6433 | UNBLOCK_INPUT; |
4588ec20 JB |
6434 | return Qnil; |
6435 | } | |
6436 | ||
5f5c8ee5 | 6437 | |
4588ec20 | 6438 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 6439 | doc: /* Beep, or flash the screen. |
228299fa | 6440 | Also, unless an argument is given, |
7ee72033 MB |
6441 | terminate any keyboard macro currently executing. */) |
6442 | (arg) | |
4588ec20 JB |
6443 | Lisp_Object arg; |
6444 | { | |
efb859b4 | 6445 | if (!NILP (arg)) |
4588ec20 | 6446 | { |
7fa788da RS |
6447 | if (noninteractive) |
6448 | putchar (07); | |
6449 | else | |
6450 | ring_bell (); | |
4588ec20 JB |
6451 | fflush (stdout); |
6452 | } | |
6453 | else | |
6454 | bitch_at_user (); | |
6455 | ||
6456 | return Qnil; | |
6457 | } | |
6458 | ||
dfcf069d | 6459 | void |
4588ec20 JB |
6460 | bitch_at_user () |
6461 | { | |
6462 | if (noninteractive) | |
6463 | putchar (07); | |
5f5c8ee5 | 6464 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
4588ec20 JB |
6465 | error ("Keyboard macro terminated by a command ringing the bell"); |
6466 | else | |
6467 | ring_bell (); | |
6468 | fflush (stdout); | |
6469 | } | |
6470 | ||
5f5c8ee5 GM |
6471 | |
6472 | \f | |
6473 | /*********************************************************************** | |
6474 | Sleeping, Waiting | |
6475 | ***********************************************************************/ | |
6476 | ||
4588ec20 | 6477 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 6478 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
6479 | SECONDS may be a floating-point value, meaning that you can wait for a |
6480 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
6481 | additional wait period, in milliseconds; this may be useful if your | |
6482 | Emacs was built without floating point support. | |
7ee72033 MB |
6483 | \(Not all operating systems support waiting for a fraction of a second.) */) |
6484 | (seconds, milliseconds) | |
767229f8 | 6485 | Lisp_Object seconds, milliseconds; |
4588ec20 | 6486 | { |
767229f8 | 6487 | int sec, usec; |
4588ec20 | 6488 | |
767229f8 | 6489 | if (NILP (milliseconds)) |
e9c9a718 | 6490 | XSETINT (milliseconds, 0); |
767229f8 | 6491 | else |
b7826503 | 6492 | CHECK_NUMBER (milliseconds); |
b07646f5 JB |
6493 | usec = XINT (milliseconds) * 1000; |
6494 | ||
b07646f5 JB |
6495 | { |
6496 | double duration = extract_float (seconds); | |
6497 | sec = (int) duration; | |
6498 | usec += (duration - sec) * 1000000; | |
6499 | } | |
4588ec20 | 6500 | |
a41f8bed | 6501 | #ifndef EMACS_HAS_USECS |
767229f8 | 6502 | if (sec == 0 && usec != 0) |
861e19b9 | 6503 | error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); |
4588ec20 | 6504 | #endif |
767229f8 JB |
6505 | |
6506 | /* Assure that 0 <= usec < 1000000. */ | |
6507 | if (usec < 0) | |
6508 | { | |
153a073c | 6509 | /* We can't rely on the rounding being correct if usec is negative. */ |
767229f8 JB |
6510 | if (-1000000 < usec) |
6511 | sec--, usec += 1000000; | |
6512 | else | |
6513 | sec -= -usec / 1000000, usec = 1000000 - (-usec % 1000000); | |
4588ec20 | 6514 | } |
767229f8 JB |
6515 | else |
6516 | sec += usec / 1000000, usec %= 1000000; | |
6517 | ||
6b5153b1 | 6518 | if (sec < 0 || (sec == 0 && usec == 0)) |
767229f8 | 6519 | return Qnil; |
4588ec20 | 6520 | |
dcd1ca45 | 6521 | wait_reading_process_output (sec, usec, 0, 0, Qnil, NULL, 0); |
4588ec20 JB |
6522 | |
6523 | return Qnil; | |
6524 | } | |
6525 | ||
5f5c8ee5 | 6526 | |
dcd1ca45 | 6527 | /* This is just like wait_reading_process_output, except that |
902b9b6d KS |
6528 | it does redisplay. |
6529 | ||
2bcac766 CY |
6530 | TIMEOUT is number of seconds to wait (float or integer), |
6531 | or t to wait forever. | |
902b9b6d KS |
6532 | READING is 1 if reading input. |
6533 | If DO_DISPLAY is >0 display process output while waiting. | |
6534 | If DO_DISPLAY is >1 perform an initial redisplay before waiting. | |
6535 | */ | |
4588ec20 | 6536 | |
f76475ad | 6537 | Lisp_Object |
902b9b6d KS |
6538 | sit_for (timeout, reading, do_display) |
6539 | Lisp_Object timeout; | |
6540 | int reading, do_display; | |
f76475ad | 6541 | { |
902b9b6d | 6542 | int sec, usec; |
f222369e | 6543 | |
902b9b6d | 6544 | swallow_events (do_display); |
ccddf474 | 6545 | |
902b9b6d | 6546 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 6547 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 6548 | return Qnil; |
4588ec20 | 6549 | |
902b9b6d KS |
6550 | if (do_display >= 2) |
6551 | redisplay_preserve_echo_area (2); | |
6552 | ||
8e09f23f | 6553 | if (INTEGERP (timeout)) |
902b9b6d | 6554 | { |
7ff14773 | 6555 | sec = XINT (timeout); |
8e09f23f KS |
6556 | usec = 0; |
6557 | } | |
6558 | else if (FLOATP (timeout)) | |
6559 | { | |
99a20368 | 6560 | double seconds = XFLOAT_DATA (timeout); |
902b9b6d KS |
6561 | sec = (int) seconds; |
6562 | usec = (int) ((seconds - sec) * 1000000); | |
6563 | } | |
2bcac766 CY |
6564 | else if (EQ (timeout, Qt)) |
6565 | { | |
6566 | sec = 0; | |
6567 | usec = 0; | |
6568 | } | |
902b9b6d | 6569 | else |
8e09f23f | 6570 | wrong_type_argument (Qnumberp, timeout); |
4588ec20 | 6571 | |
2bcac766 | 6572 | if (sec == 0 && usec == 0 && !EQ (timeout, Qt)) |
dfdb645c JB |
6573 | return Qt; |
6574 | ||
4588ec20 | 6575 | #ifdef SIGIO |
8fc798e9 | 6576 | gobble_input (0); |
f76475ad JB |
6577 | #endif |
6578 | ||
902b9b6d | 6579 | wait_reading_process_output (sec, usec, reading ? -1 : 1, do_display, |
dcd1ca45 | 6580 | Qnil, NULL, 0); |
f76475ad | 6581 | |
4588ec20 JB |
6582 | return detect_input_pending () ? Qnil : Qt; |
6583 | } | |
6584 | ||
5f5c8ee5 | 6585 | |
01327edf KS |
6586 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
6587 | doc: /* Perform redisplay if no input is available. | |
a5c2c707 | 6588 | If optional arg FORCE is non-nil or `redisplay-dont-pause' is non-nil, |
03240971 KS |
6589 | perform a full redisplay even if input is available. |
6590 | Return t if redisplay was performed, nil otherwise. */) | |
01327edf KS |
6591 | (force) |
6592 | Lisp_Object force; | |
f76475ad | 6593 | { |
01327edf KS |
6594 | int count; |
6595 | ||
902b9b6d KS |
6596 | swallow_events (1); |
6597 | if ((detect_input_pending_run_timers (1) | |
01327edf | 6598 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
6599 | || !NILP (Vexecuting_kbd_macro)) |
6600 | return Qnil; | |
f76475ad | 6601 | |
01327edf KS |
6602 | count = SPECPDL_INDEX (); |
6603 | if (!NILP (force) && !redisplay_dont_pause) | |
6604 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 6605 | redisplay_preserve_echo_area (2); |
01327edf | 6606 | unbind_to (count, Qnil); |
7ba07a1a | 6607 | return Qt; |
f76475ad | 6608 | } |
5f5c8ee5 GM |
6609 | |
6610 | ||
6611 | \f | |
6612 | /*********************************************************************** | |
6613 | Other Lisp Functions | |
6614 | ***********************************************************************/ | |
6615 | ||
6616 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
6617 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 6618 | buffer-modified-flags. */ |
5f5c8ee5 GM |
6619 | |
6620 | static Lisp_Object frame_and_buffer_state; | |
6621 | ||
6622 | ||
6623 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 6624 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 6625 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
6626 | VARIABLE is a variable name whose value is either nil or a state vector |
6627 | that will be updated to contain all frames and buffers, | |
228299fa | 6628 | aside from buffers whose names start with space, |
44edd521 RS |
6629 | along with the buffers' read-only and modified flags. This allows a fast |
6630 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 6631 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
6632 | the current state. |
6633 | ||
6634 | If VARIABLE is nil, an internal variable is used. Users should not | |
6635 | pass nil for VARIABLE. */) | |
6636 | (variable) | |
6637 | Lisp_Object variable; | |
5f5c8ee5 | 6638 | { |
44edd521 RS |
6639 | Lisp_Object state, tail, frame, buf; |
6640 | Lisp_Object *vecp, *end; | |
5f5c8ee5 GM |
6641 | int n; |
6642 | ||
44edd521 RS |
6643 | if (! NILP (variable)) |
6644 | { | |
6645 | CHECK_SYMBOL (variable); | |
6646 | state = Fsymbol_value (variable); | |
6647 | if (! VECTORP (state)) | |
6648 | goto changed; | |
6649 | } | |
6650 | else | |
6651 | state = frame_and_buffer_state; | |
6652 | ||
6653 | vecp = XVECTOR (state)->contents; | |
6654 | end = vecp + XVECTOR (state)->size; | |
6655 | ||
5f5c8ee5 GM |
6656 | FOR_EACH_FRAME (tail, frame) |
6657 | { | |
44edd521 RS |
6658 | if (vecp == end) |
6659 | goto changed; | |
5f5c8ee5 GM |
6660 | if (!EQ (*vecp++, frame)) |
6661 | goto changed; | |
44edd521 RS |
6662 | if (vecp == end) |
6663 | goto changed; | |
5f5c8ee5 GM |
6664 | if (!EQ (*vecp++, XFRAME (frame)->name)) |
6665 | goto changed; | |
6666 | } | |
44edd521 | 6667 | /* Check that the buffer info matches. */ |
7539e11f | 6668 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6669 | { |
7539e11f | 6670 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6671 | /* Ignore buffers that aren't included in buffer lists. */ |
d5db4077 | 6672 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
5f5c8ee5 | 6673 | continue; |
44edd521 RS |
6674 | if (vecp == end) |
6675 | goto changed; | |
5f5c8ee5 GM |
6676 | if (!EQ (*vecp++, buf)) |
6677 | goto changed; | |
44edd521 RS |
6678 | if (vecp == end) |
6679 | goto changed; | |
5f5c8ee5 GM |
6680 | if (!EQ (*vecp++, XBUFFER (buf)->read_only)) |
6681 | goto changed; | |
44edd521 RS |
6682 | if (vecp == end) |
6683 | goto changed; | |
5f5c8ee5 GM |
6684 | if (!EQ (*vecp++, Fbuffer_modified_p (buf))) |
6685 | goto changed; | |
6686 | } | |
44edd521 RS |
6687 | if (vecp == end) |
6688 | goto changed; | |
5f5c8ee5 GM |
6689 | /* Detect deletion of a buffer at the end of the list. */ |
6690 | if (EQ (*vecp, Qlambda)) | |
6691 | return Qnil; | |
44edd521 RS |
6692 | |
6693 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 6694 | changed: |
44edd521 RS |
6695 | /* Count the size we will need. |
6696 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
6697 | n = 1; |
6698 | FOR_EACH_FRAME (tail, frame) | |
6699 | n += 2; | |
7539e11f | 6700 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6701 | n += 3; |
44edd521 RS |
6702 | /* Reallocate the vector if data has grown to need it, |
6703 | or if it has shrunk a lot. */ | |
6704 | if (! VECTORP (state) | |
6705 | || n > XVECTOR (state)->size | |
6706 | || n + 20 < XVECTOR (state)->size / 2) | |
5f5c8ee5 | 6707 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
6708 | { |
6709 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
6710 | if (! NILP (variable)) | |
6711 | Fset (variable, state); | |
6712 | else | |
6713 | frame_and_buffer_state = state; | |
6714 | } | |
6715 | ||
6716 | /* Record the new data in the (possibly reallocated) vector. */ | |
6717 | vecp = XVECTOR (state)->contents; | |
5f5c8ee5 GM |
6718 | FOR_EACH_FRAME (tail, frame) |
6719 | { | |
6720 | *vecp++ = frame; | |
6721 | *vecp++ = XFRAME (frame)->name; | |
6722 | } | |
7539e11f | 6723 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6724 | { |
7539e11f | 6725 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6726 | /* Ignore buffers that aren't included in buffer lists. */ |
d5db4077 | 6727 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
5f5c8ee5 GM |
6728 | continue; |
6729 | *vecp++ = buf; | |
6730 | *vecp++ = XBUFFER (buf)->read_only; | |
6731 | *vecp++ = Fbuffer_modified_p (buf); | |
6732 | } | |
6733 | /* Fill up the vector with lambdas (always at least one). */ | |
6734 | *vecp++ = Qlambda; | |
44edd521 RS |
6735 | while (vecp - XVECTOR (state)->contents |
6736 | < XVECTOR (state)->size) | |
5f5c8ee5 GM |
6737 | *vecp++ = Qlambda; |
6738 | /* Make sure we didn't overflow the vector. */ | |
44edd521 RS |
6739 | if (vecp - XVECTOR (state)->contents |
6740 | > XVECTOR (state)->size) | |
5f5c8ee5 GM |
6741 | abort (); |
6742 | return Qt; | |
6743 | } | |
6744 | ||
6745 | ||
4588ec20 | 6746 | \f |
5f5c8ee5 GM |
6747 | /*********************************************************************** |
6748 | Initialization | |
6749 | ***********************************************************************/ | |
6750 | ||
4588ec20 JB |
6751 | char *terminal_type; |
6752 | ||
5f5c8ee5 GM |
6753 | /* Initialization done when Emacs fork is started, before doing stty. |
6754 | Determine terminal type and set terminal_driver. Then invoke its | |
6755 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 6756 | |
dfcf069d | 6757 | void |
4588ec20 JB |
6758 | init_display () |
6759 | { | |
6760 | #ifdef HAVE_X_WINDOWS | |
6761 | extern int display_arg; | |
6762 | #endif | |
6763 | ||
5f5c8ee5 GM |
6764 | /* Construct the space glyph. */ |
6765 | space_glyph.type = CHAR_GLYPH; | |
6766 | SET_CHAR_GLYPH_FROM_GLYPH (space_glyph, ' '); | |
6767 | space_glyph.charpos = -1; | |
6768 | ||
4588ec20 JB |
6769 | meta_key = 0; |
6770 | inverse_video = 0; | |
6771 | cursor_in_echo_area = 0; | |
6772 | terminal_type = (char *) 0; | |
6773 | ||
1315c181 JB |
6774 | /* Now is the time to initialize this; it's used by init_sys_modes |
6775 | during startup. */ | |
6776 | Vwindow_system = Qnil; | |
4588ec20 | 6777 | |
1315c181 JB |
6778 | /* If the user wants to use a window system, we shouldn't bother |
6779 | initializing the terminal. This is especially important when the | |
6780 | terminal is so dumb that emacs gives up before and doesn't bother | |
6781 | using the window system. | |
4588ec20 | 6782 | |
36bbad1d KH |
6783 | If the DISPLAY environment variable is set and nonempty, |
6784 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6785 | |
6786 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 6787 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 6788 | { |
36bbad1d | 6789 | char *display; |
d460af17 | 6790 | #ifdef VMS |
36bbad1d | 6791 | display = getenv ("DECW$DISPLAY"); |
d460af17 | 6792 | #else |
36bbad1d | 6793 | display = getenv ("DISPLAY"); |
d460af17 | 6794 | #endif |
36bbad1d KH |
6795 | |
6796 | display_arg = (display != 0 && *display != 0); | |
c1fc674b AS |
6797 | |
6798 | if (display_arg && !x_display_ok (display)) | |
6799 | { | |
6800 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
6801 | display); | |
6802 | inhibit_window_system = 1; | |
6803 | } | |
f040093a | 6804 | } |
d460af17 | 6805 | |
177c0ea7 | 6806 | if (!inhibit_window_system && display_arg |
9e4555e8 RS |
6807 | #ifndef CANNOT_DUMP |
6808 | && initialized | |
6809 | #endif | |
6810 | ) | |
4588ec20 JB |
6811 | { |
6812 | Vwindow_system = intern ("x"); | |
6813 | #ifdef HAVE_X11 | |
6814 | Vwindow_system_version = make_number (11); | |
6815 | #else | |
6816 | Vwindow_system_version = make_number (10); | |
039e5d71 | 6817 | #endif |
8a2a6032 | 6818 | #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES) |
039e5d71 | 6819 | /* In some versions of ncurses, |
6a428f77 | 6820 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6821 | So call tgetent. */ |
6822 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 | 6823 | #endif |
5f5c8ee5 | 6824 | adjust_frame_glyphs_initially (); |
4588ec20 JB |
6825 | return; |
6826 | } | |
6827 | #endif /* HAVE_X_WINDOWS */ | |
6828 | ||
fd2e066a | 6829 | #ifdef HAVE_NTGUI |
177c0ea7 | 6830 | if (!inhibit_window_system) |
fd2e066a | 6831 | { |
60c7469c | 6832 | Vwindow_system = intern ("w32"); |
fd2e066a | 6833 | Vwindow_system_version = make_number (1); |
5f5c8ee5 | 6834 | adjust_frame_glyphs_initially (); |
fd2e066a GV |
6835 | return; |
6836 | } | |
6837 | #endif /* HAVE_NTGUI */ | |
6838 | ||
e0f712ba | 6839 | #ifdef MAC_OS |
177c0ea7 | 6840 | if (!inhibit_window_system) |
1a578e9b AC |
6841 | { |
6842 | Vwindow_system = intern ("mac"); | |
6843 | Vwindow_system_version = make_number (1); | |
6844 | adjust_frame_glyphs_initially (); | |
6845 | return; | |
6846 | } | |
e0f712ba | 6847 | #endif /* MAC_OS */ |
1a578e9b | 6848 | |
4588ec20 JB |
6849 | /* If no window system has been specified, try to use the terminal. */ |
6850 | if (! isatty (0)) | |
6851 | { | |
1559a86d | 6852 | fatal ("standard input is not a tty"); |
4588ec20 JB |
6853 | exit (1); |
6854 | } | |
6855 | ||
153a073c | 6856 | /* Look at the TERM variable. */ |
4588ec20 JB |
6857 | terminal_type = (char *) getenv ("TERM"); |
6858 | if (!terminal_type) | |
6859 | { | |
6860 | #ifdef VMS | |
6861 | fprintf (stderr, "Please specify your terminal type.\n\ | |
6862 | For types defined in VMS, use set term /device=TYPE.\n\ | |
6863 | For types not defined in VMS, use define emacs_term \"TYPE\".\n\ | |
6864 | \(The quotation marks are necessary since terminal types are lower case.)\n"); | |
5d12ff0b RS |
6865 | #else /* not VMS */ |
6866 | ||
6867 | #ifdef HAVE_WINDOW_SYSTEM | |
b9e590fc RS |
6868 | if (! inhibit_window_system) |
6869 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6870 | else |
6871 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6872 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
5d12ff0b | 6873 | #endif /* not VMS */ |
4588ec20 JB |
6874 | exit (1); |
6875 | } | |
6876 | ||
6877 | #ifdef VMS | |
5f5c8ee5 | 6878 | /* VMS DCL tends to up-case things, so down-case term type. |
4588ec20 JB |
6879 | Hardly any uppercase letters in terminal types; should be none. */ |
6880 | { | |
6881 | char *new = (char *) xmalloc (strlen (terminal_type) + 1); | |
6882 | char *p; | |
6883 | ||
6884 | strcpy (new, terminal_type); | |
6885 | ||
6886 | for (p = new; *p; p++) | |
6887 | if (isupper (*p)) | |
6888 | *p = tolower (*p); | |
6889 | ||
6890 | terminal_type = new; | |
177c0ea7 | 6891 | } |
5f5c8ee5 | 6892 | #endif /* VMS */ |
4588ec20 JB |
6893 | |
6894 | term_init (terminal_type); | |
177c0ea7 | 6895 | |
d86c299a | 6896 | { |
91fb7e1b | 6897 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6898 | int width = FRAME_TOTAL_COLS (sf); |
6899 | int height = FRAME_LINES (sf); | |
d86c299a | 6900 | |
5f5c8ee5 | 6901 | unsigned int total_glyphs = height * (width + 2) * sizeof (struct glyph); |
d86c299a | 6902 | |
5f5c8ee5 GM |
6903 | /* If these sizes are so big they cause overflow, just ignore the |
6904 | change. It's not clear what better we could do. */ | |
6905 | if (total_glyphs / sizeof (struct glyph) / height != width + 2) | |
1559a86d | 6906 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6907 | } |
6908 | ||
5f5c8ee5 | 6909 | adjust_frame_glyphs_initially (); |
91fb7e1b | 6910 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6911 | |
4588ec20 JB |
6912 | #ifdef SIGWINCH |
6913 | #ifndef CANNOT_DUMP | |
6914 | if (initialized) | |
6915 | #endif /* CANNOT_DUMP */ | |
6916 | signal (SIGWINCH, window_change_signal); | |
6917 | #endif /* SIGWINCH */ | |
5f5c8ee5 GM |
6918 | |
6919 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ | |
6920 | if (initialized | |
6921 | && !noninteractive | |
622dca89 EZ |
6922 | #ifdef MSDOS |
6923 | /* The MSDOS terminal turns on its ``window system'' relatively | |
6924 | late into the startup, so we cannot do the frame faces' | |
6925 | initialization just yet. It will be done later by pc-win.el | |
6926 | and internal_terminal_init. */ | |
6927 | && (strcmp (terminal_type, "internal") != 0 || inhibit_window_system) | |
6928 | #endif | |
5f5c8ee5 | 6929 | && NILP (Vwindow_system)) |
2d764c78 EZ |
6930 | { |
6931 | /* For the initial frame, we don't have any way of knowing what | |
6932 | are the foreground and background colors of the terminal. */ | |
6933 | struct frame *sf = SELECTED_FRAME(); | |
6934 | ||
f9d2fdc4 EZ |
6935 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
6936 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
6937 | call0 (intern ("tty-set-up-initial-frame-faces")); |
6938 | } | |
5f5c8ee5 GM |
6939 | } |
6940 | ||
6941 | ||
6942 | \f | |
6943 | /*********************************************************************** | |
6944 | Blinking cursor | |
6945 | ***********************************************************************/ | |
6946 | ||
c3f13540 | 6947 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 6948 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 6949 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
6950 | WINDOW nil means use the selected window. SHOW non-nil means |
6951 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 MB |
6952 | don't show a cursor. */) |
6953 | (window, show) | |
5d7791b3 | 6954 | Lisp_Object window, show; |
5f5c8ee5 | 6955 | { |
5f5c8ee5 GM |
6956 | /* Don't change cursor state while redisplaying. This could confuse |
6957 | output routines. */ | |
6958 | if (!redisplaying_p) | |
6959 | { | |
6960 | if (NILP (window)) | |
6961 | window = selected_window; | |
6962 | else | |
b7826503 | 6963 | CHECK_WINDOW (window); |
177c0ea7 | 6964 | |
5d7791b3 | 6965 | XWINDOW (window)->cursor_off_p = NILP (show); |
5f5c8ee5 GM |
6966 | } |
6967 | ||
6968 | return Qnil; | |
4588ec20 | 6969 | } |
5f5c8ee5 GM |
6970 | |
6971 | ||
5d7791b3 GM |
6972 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
6973 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 6974 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 MB |
6975 | WINDOW nil or omitted means report on the selected window. */) |
6976 | (window) | |
5d7791b3 GM |
6977 | Lisp_Object window; |
6978 | { | |
6979 | struct window *w; | |
177c0ea7 | 6980 | |
5d7791b3 GM |
6981 | if (NILP (window)) |
6982 | window = selected_window; | |
6983 | else | |
b7826503 | 6984 | CHECK_WINDOW (window); |
177c0ea7 | 6985 | |
5d7791b3 | 6986 | w = XWINDOW (window); |
177c0ea7 | 6987 | return w->cursor_off_p ? Qnil : Qt; |
5d7791b3 GM |
6988 | } |
6989 | ||
4588ec20 | 6990 | \f |
5f5c8ee5 GM |
6991 | /*********************************************************************** |
6992 | Initialization | |
6993 | ***********************************************************************/ | |
6994 | ||
dfcf069d | 6995 | void |
4588ec20 JB |
6996 | syms_of_display () |
6997 | { | |
502b9b64 | 6998 | defsubr (&Sredraw_frame); |
4588ec20 | 6999 | defsubr (&Sredraw_display); |
078b3696 | 7000 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
7001 | defsubr (&Sopen_termscript); |
7002 | defsubr (&Sding); | |
7ba07a1a | 7003 | defsubr (&Sredisplay); |
4588ec20 JB |
7004 | defsubr (&Ssleep_for); |
7005 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 7006 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 7007 | defsubr (&Sinternal_show_cursor_p); |
4588ec20 | 7008 | |
2d5912c1 | 7009 | #if GLYPH_DEBUG |
9b0e97aa GM |
7010 | defsubr (&Sdump_redisplay_history); |
7011 | #endif | |
7012 | ||
d1dad759 | 7013 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
7014 | staticpro (&frame_and_buffer_state); |
7015 | ||
9cda4f7c RS |
7016 | Qdisplay_table = intern ("display-table"); |
7017 | staticpro (&Qdisplay_table); | |
e7067d00 GM |
7018 | Qredisplay_dont_pause = intern ("redisplay-dont-pause"); |
7019 | staticpro (&Qredisplay_dont_pause); | |
9cda4f7c | 7020 | |
7ee72033 | 7021 | DEFVAR_INT ("baud-rate", &baud_rate, |
bacf09b4 | 7022 | doc: /* *The output baud rate of the terminal. |
228299fa GM |
7023 | On most systems, changing this value will affect the amount of padding |
7024 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 7025 | |
7ee72033 | 7026 | DEFVAR_BOOL ("inverse-video", &inverse_video, |
bacf09b4 | 7027 | doc: /* *Non-nil means invert the entire frame display. |
228299fa | 7028 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 7029 | |
7ee72033 | 7030 | DEFVAR_BOOL ("visible-bell", &visible_bell, |
bacf09b4 | 7031 | doc: /* *Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
7032 | |
7033 | See also `ring-bell-function'. */); | |
177c0ea7 | 7034 | |
7ee72033 | 7035 | DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter, |
bacf09b4 | 7036 | doc: /* *Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
7037 | A non-nil value is useful if the terminal can automatically preserve |
7038 | Emacs's frame display when you reenter Emacs. | |
7039 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 7040 | |
7ee72033 | 7041 | DEFVAR_LISP ("window-system", &Vwindow_system, |
85565e9e RS |
7042 | doc: /* Name of window system that Emacs is displaying through. |
7043 | The value is a symbol--for instance, `x' for X windows. | |
7044 | The value is nil if Emacs is using a text-only terminal. */); | |
177c0ea7 | 7045 | |
7ee72033 | 7046 | DEFVAR_LISP ("window-system-version", &Vwindow_system_version, |
bacf09b4 | 7047 | doc: /* The version number of the window system in use. |
228299fa | 7048 | For X windows, this is 10 or 11. */); |
177c0ea7 | 7049 | |
7ee72033 | 7050 | DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area, |
bacf09b4 | 7051 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 7052 | |
7ee72033 | 7053 | DEFVAR_LISP ("glyph-table", &Vglyph_table, |
bacf09b4 | 7054 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
7055 | If not nil, this is a vector indexed by glyph code to define the glyph. |
7056 | Each element can be: | |
7057 | integer: a glyph code which this glyph is an alias for. | |
7058 | string: output this glyph using that string (not impl. in X windows). | |
7059 | nil: this glyph mod 524288 is the code of a character to output, | |
7060 | and this glyph / 524288 is the face number (see `face-id') to use | |
7061 | while outputting it. */); | |
4588ec20 JB |
7062 | Vglyph_table = Qnil; |
7063 | ||
7ee72033 | 7064 | DEFVAR_LISP ("standard-display-table", &Vstandard_display_table, |
bacf09b4 | 7065 | doc: /* Display table to use for buffers that specify none. |
228299fa | 7066 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
7067 | Vstandard_display_table = Qnil; |
7068 | ||
7ee72033 | 7069 | DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause, |
bacf09b4 | 7070 | doc: /* *Non-nil means update isn't paused when input is detected. */); |
5f5c8ee5 GM |
7071 | redisplay_dont_pause = 0; |
7072 | ||
d012c62b KS |
7073 | #if PERIODIC_PREEMPTION_CHECKING |
7074 | DEFVAR_LISP ("redisplay-preemption-period", &Vredisplay_preemption_period, | |
7075 | doc: /* *The period in seconds between checking for input during redisplay. | |
7076 | If input is detected, redisplay is pre-empted, and the input is processed. | |
7077 | If nil, never pre-empt redisplay. */); | |
7078 | Vredisplay_preemption_period = make_float (0.10); | |
7079 | #endif | |
7080 | ||
4588ec20 JB |
7081 | #ifdef CANNOT_DUMP |
7082 | if (noninteractive) | |
7083 | #endif | |
7084 | { | |
7085 | Vwindow_system = Qnil; | |
7086 | Vwindow_system_version = Qnil; | |
7087 | } | |
7088 | } | |
ab5796a9 MB |
7089 | |
7090 | /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413 | |
7091 | (do not change this comment) */ |