Commit | Line | Data |
---|---|---|
a2889657 | 1 | /* Display generation from window structure and buffer text. |
6f0429a9 | 2 | Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 97, 1998 |
2384c010 | 3 | Free Software Foundation, Inc. |
a2889657 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
b1d1124b | 9 | the Free Software Foundation; either version 2, or (at your option) |
a2889657 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
a2889657 JB |
21 | |
22 | ||
18160b98 | 23 | #include <config.h> |
a2889657 JB |
24 | #include <stdio.h> |
25 | /*#include <ctype.h>*/ | |
26 | #undef NULL | |
27 | #include "lisp.h" | |
44fa5b1e | 28 | #include "frame.h" |
a2889657 JB |
29 | #include "window.h" |
30 | #include "termchar.h" | |
31 | #include "dispextern.h" | |
32 | #include "buffer.h" | |
1c9241f5 | 33 | #include "charset.h" |
a2889657 JB |
34 | #include "indent.h" |
35 | #include "commands.h" | |
36 | #include "macros.h" | |
37 | #include "disptab.h" | |
30c566e4 | 38 | #include "termhooks.h" |
b0a0fbda | 39 | #include "intervals.h" |
fe8b0cf8 | 40 | #include "keyboard.h" |
1c9241f5 KH |
41 | #include "coding.h" |
42 | #include "process.h" | |
dfcf069d AS |
43 | #include "region-cache.h" |
44 | ||
6d55d620 | 45 | #ifdef HAVE_X_WINDOWS |
dfcf069d AS |
46 | #include "xterm.h" |
47 | #endif | |
a2889657 | 48 | |
8f3343d0 | 49 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) |
76412d64 | 50 | extern void set_frame_menubar (); |
cd6dfed6 | 51 | extern int pending_menu_activation; |
76412d64 RS |
52 | #endif |
53 | ||
a2889657 JB |
54 | extern int interrupt_input; |
55 | extern int command_loop_level; | |
56 | ||
b6436d4e RS |
57 | extern int minibuffer_auto_raise; |
58 | ||
c4628384 RS |
59 | extern Lisp_Object Qface; |
60 | ||
399164b4 KH |
61 | extern Lisp_Object Voverriding_local_map; |
62 | extern Lisp_Object Voverriding_local_map_menu_flag; | |
63 | ||
d46fb96a | 64 | Lisp_Object Qoverriding_local_map, Qoverriding_terminal_local_map; |
75c43375 | 65 | Lisp_Object Qwindow_scroll_functions, Vwindow_scroll_functions; |
e0bfbde6 | 66 | Lisp_Object Qredisplay_end_trigger_functions; |
2e54982e | 67 | Lisp_Object Qinhibit_point_motion_hooks; |
399164b4 | 68 | |
735c094c KH |
69 | /* Non-nil means don't actually do any redisplay. */ |
70 | ||
71 | Lisp_Object Vinhibit_redisplay, Qinhibit_redisplay; | |
72 | ||
f88eb0b6 | 73 | /* Nonzero means print newline to stdout before next minibuffer message. */ |
a2889657 JB |
74 | |
75 | int noninteractive_need_newline; | |
76 | ||
f88eb0b6 KH |
77 | /* Nonzero means print newline to message log before next message. */ |
78 | ||
3c6595e0 | 79 | static int message_log_need_newline; |
f88eb0b6 | 80 | |
a2889657 JB |
81 | #define min(a, b) ((a) < (b) ? (a) : (b)) |
82 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
210e752f KH |
83 | #define minmax(floor, val, ceil) \ |
84 | ((val) < (floor) ? (floor) : (val) > (ceil) ? (ceil) : (val)) | |
a2889657 JB |
85 | |
86 | /* The buffer position of the first character appearing | |
44fa5b1e JB |
87 | entirely or partially on the current frame line. |
88 | Or zero, which disables the optimization for the current frame line. */ | |
a2889657 JB |
89 | static int this_line_bufpos; |
90 | ||
91 | /* Number of characters past the end of this line, | |
92 | including the terminating newline */ | |
93 | static int this_line_endpos; | |
94 | ||
44fa5b1e | 95 | /* The vertical position of this frame line. */ |
a2889657 JB |
96 | static int this_line_vpos; |
97 | ||
44fa5b1e | 98 | /* Hpos value for start of display on this frame line. |
a2889657 JB |
99 | Usually zero, but negative if first character really began |
100 | on previous line */ | |
101 | static int this_line_start_hpos; | |
102 | ||
103 | /* Buffer that this_line variables are describing. */ | |
104 | static struct buffer *this_line_buffer; | |
105 | ||
a2889657 | 106 | /* Value of echo_area_glyphs when it was last acted on. |
44fa5b1e | 107 | If this is nonzero, there is a message on the frame |
a2889657 JB |
108 | in the minibuffer and it should be erased as soon |
109 | as it is no longer requested to appear. */ | |
110 | char *previous_echo_glyphs; | |
111 | ||
44fa5b1e | 112 | /* Nonzero means truncate lines in all windows less wide than the frame */ |
a2889657 JB |
113 | int truncate_partial_width_windows; |
114 | ||
7bbe686f AI |
115 | /* A flag to control how to display unibyte 8-bit character. */ |
116 | int unibyte_display_via_language_environment; | |
117 | ||
d39b6696 KH |
118 | /* Nonzero means we have more than one non-minibuffer-only frame. |
119 | Not guaranteed to be accurate except while parsing frame-title-format. */ | |
120 | int multiple_frames; | |
121 | ||
a2889657 JB |
122 | Lisp_Object Vglobal_mode_string; |
123 | ||
124 | /* Marker for where to display an arrow on top of the buffer text. */ | |
125 | Lisp_Object Voverlay_arrow_position; | |
126 | ||
127 | /* String to display for the arrow. */ | |
128 | Lisp_Object Voverlay_arrow_string; | |
129 | ||
d45de95b RS |
130 | /* Values of those variables at last redisplay. |
131 | However, if Voverlay_arrow_position is a marker, | |
132 | last_arrow_position is its numerical position. */ | |
133 | static Lisp_Object last_arrow_position, last_arrow_string; | |
134 | ||
d39b6696 KH |
135 | /* Like mode-line-format, but for the titlebar on a visible frame. */ |
136 | Lisp_Object Vframe_title_format; | |
137 | ||
138 | /* Like mode-line-format, but for the titlebar on an iconified frame. */ | |
139 | Lisp_Object Vicon_title_format; | |
140 | ||
08b610e4 RS |
141 | /* List of functions to call when a window's size changes. These |
142 | functions get one arg, a frame on which one or more windows' sizes | |
143 | have changed. */ | |
144 | static Lisp_Object Vwindow_size_change_functions; | |
145 | ||
cf074754 RS |
146 | Lisp_Object Qmenu_bar_update_hook; |
147 | ||
a2889657 JB |
148 | /* Nonzero if overlay arrow has been displayed once in this window. */ |
149 | static int overlay_arrow_seen; | |
150 | ||
ca26e1c8 KH |
151 | /* Nonzero if visible end of buffer has already been displayed once |
152 | in this window. (We need this variable in case there are overlay | |
153 | strings that get displayed there.) */ | |
154 | static int zv_strings_seen; | |
155 | ||
fba9ce76 RS |
156 | /* Nonzero means highlight the region even in nonselected windows. */ |
157 | static int highlight_nonselected_windows; | |
158 | ||
44fa5b1e | 159 | /* If cursor motion alone moves point off frame, |
a2889657 | 160 | Try scrolling this many lines up or down if that will bring it back. */ |
14510fee | 161 | static int scroll_step; |
a2889657 | 162 | |
0789adb2 RS |
163 | /* Non-0 means scroll just far enough to bring point back on the screen, |
164 | when appropriate. */ | |
165 | static int scroll_conservatively; | |
166 | ||
9afd2168 RS |
167 | /* Recenter the window whenever point gets within this many lines |
168 | of the top or bottom of the window. */ | |
169 | int scroll_margin; | |
170 | ||
010494d0 KH |
171 | /* Number of characters of overlap to show, |
172 | when scrolling a one-line window such as a minibuffer. */ | |
173 | static int minibuffer_scroll_overlap; | |
174 | ||
a2889657 JB |
175 | /* Nonzero if try_window_id has made blank lines at window bottom |
176 | since the last redisplay that paused */ | |
177 | static int blank_end_of_window; | |
178 | ||
42640f83 RS |
179 | /* Number of windows showing the buffer of the selected window |
180 | (or another buffer with the same base buffer). | |
a2889657 JB |
181 | keyboard.c refers to this. */ |
182 | int buffer_shared; | |
183 | ||
44fa5b1e | 184 | /* display_text_line sets these to the frame position (origin 0) of point, |
a2889657 JB |
185 | whether the window is selected or not. |
186 | Set one to -1 first to determine whether point was found afterwards. */ | |
187 | ||
188 | static int cursor_vpos; | |
189 | static int cursor_hpos; | |
190 | ||
14510fee | 191 | static int debug_end_pos; |
a2889657 JB |
192 | |
193 | /* Nonzero means display mode line highlighted */ | |
194 | int mode_line_inverse_video; | |
195 | ||
e9874cee | 196 | static void redisplay_internal (); |
ff6c30e5 | 197 | static int message_log_check_duplicate (); |
a2889657 JB |
198 | static void echo_area_display (); |
199 | void mark_window_display_accurate (); | |
200 | static void redisplay_windows (); | |
201 | static void redisplay_window (); | |
90adcf20 | 202 | static void update_menu_bar (); |
a2889657 JB |
203 | static void try_window (); |
204 | static int try_window_id (); | |
205 | static struct position *display_text_line (); | |
206 | static void display_mode_line (); | |
207 | static int display_mode_element (); | |
a2889657 JB |
208 | static char *decode_mode_spec (); |
209 | static int display_string (); | |
7ce2c095 | 210 | static void display_menu_bar (); |
aa6d10fa | 211 | static int display_count_lines (); |
a2889657 JB |
212 | |
213 | /* Prompt to display in front of the minibuffer contents */ | |
8c5b6a0a | 214 | Lisp_Object minibuf_prompt; |
a2889657 JB |
215 | |
216 | /* Width in columns of current minibuffer prompt. */ | |
217 | int minibuf_prompt_width; | |
218 | ||
219 | /* Message to display instead of minibuffer contents | |
220 | This is what the functions error and message make, | |
221 | and command echoing uses it as well. | |
222 | It overrides the minibuf_prompt as well as the buffer. */ | |
223 | char *echo_area_glyphs; | |
224 | ||
90adcf20 RS |
225 | /* This is the length of the message in echo_area_glyphs. */ |
226 | int echo_area_glyphs_length; | |
227 | ||
73af359d RS |
228 | /* This is the window where the echo area message was displayed. |
229 | It is always a minibuffer window, but it may not be the | |
230 | same window currently active as a minibuffer. */ | |
231 | Lisp_Object echo_area_window; | |
232 | ||
a3788d53 RS |
233 | /* Nonzero means multibyte characters were enabled when the echo area |
234 | message was specified. */ | |
235 | int message_enable_multibyte; | |
236 | ||
a2889657 JB |
237 | /* true iff we should redraw the mode lines on the next redisplay */ |
238 | int update_mode_lines; | |
239 | ||
240 | /* Smallest number of characters before the gap | |
241 | at any time since last redisplay that finished. | |
242 | Valid for current buffer when try_window_id can be called. */ | |
243 | int beg_unchanged; | |
244 | ||
245 | /* Smallest number of characters after the gap | |
246 | at any time since last redisplay that finished. | |
247 | Valid for current buffer when try_window_id can be called. */ | |
248 | int end_unchanged; | |
249 | ||
250 | /* MODIFF as of last redisplay that finished; | |
8850a573 RS |
251 | if it matches MODIFF, and overlay_unchanged_modified |
252 | matches OVERLAY_MODIFF, that means beg_unchanged and end_unchanged | |
a2889657 JB |
253 | contain no useful information */ |
254 | int unchanged_modified; | |
255 | ||
8850a573 RS |
256 | /* OVERLAY_MODIFF as of last redisplay that finished. */ |
257 | int overlay_unchanged_modified; | |
258 | ||
a2889657 JB |
259 | /* Nonzero if window sizes or contents have changed |
260 | since last redisplay that finished */ | |
261 | int windows_or_buffers_changed; | |
262 | ||
aa6d10fa RS |
263 | /* Nonzero after display_mode_line if %l was used |
264 | and it displayed a line number. */ | |
265 | int line_number_displayed; | |
266 | ||
267 | /* Maximum buffer size for which to display line numbers. */ | |
14510fee | 268 | static int line_number_display_limit; |
5992c4f7 KH |
269 | |
270 | /* Number of lines to keep in the message log buffer. | |
271 | t means infinite. nil means don't log at all. */ | |
272 | Lisp_Object Vmessage_log_max; | |
d45de95b RS |
273 | |
274 | #define COERCE_MARKER(X) \ | |
377dbd97 | 275 | (MARKERP ((X)) ? Fmarker_position (X) : (X)) |
12adba34 RS |
276 | |
277 | static int pos_tab_offset P_ ((struct window *, int, int)); | |
a2889657 | 278 | \f |
1adc55de RS |
279 | /* Output a newline in the *Messages* buffer if "needs" one. */ |
280 | ||
3c6595e0 KH |
281 | void |
282 | message_log_maybe_newline () | |
283 | { | |
284 | if (message_log_need_newline) | |
0a9dc68b | 285 | message_dolog ("", 0, 1, 0); |
3c6595e0 KH |
286 | } |
287 | ||
288 | ||
d917be71 KH |
289 | /* Add a string to the message log, optionally terminated with a newline. |
290 | This function calls low-level routines in order to bypass text property | |
0a9dc68b RS |
291 | hooks, etc. which might not be safe to run. |
292 | MULTIBYTE, if nonzero, means interpret the contents of M as multibyte. */ | |
90adcf20 RS |
293 | |
294 | void | |
0a9dc68b | 295 | message_dolog (m, len, nlflag, multibyte) |
90adcf20 | 296 | char *m; |
0a9dc68b | 297 | int len, nlflag, multibyte; |
5992c4f7 | 298 | { |
f88eb0b6 | 299 | if (!NILP (Vmessage_log_max)) |
5992c4f7 KH |
300 | { |
301 | struct buffer *oldbuf; | |
12adba34 | 302 | Lisp_Object oldpoint, oldbegv, oldzv; |
69f033ab | 303 | int old_windows_or_buffers_changed = windows_or_buffers_changed; |
bab29e15 RS |
304 | int point_at_end = 0; |
305 | int zv_at_end = 0; | |
e18a235e | 306 | Lisp_Object old_deactivate_mark, tem; |
43c158ed | 307 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
5992c4f7 | 308 | |
84dd0ae5 | 309 | old_deactivate_mark = Vdeactivate_mark; |
5992c4f7 | 310 | oldbuf = current_buffer; |
3c6595e0 | 311 | Fset_buffer (Fget_buffer_create (build_string ("*Messages*"))); |
16c300fb | 312 | current_buffer->undo_list = Qt; |
12adba34 RS |
313 | |
314 | oldpoint = Fpoint_marker (); | |
315 | oldbegv = Fpoint_min_marker (); | |
316 | oldzv = Fpoint_max_marker (); | |
43c158ed | 317 | GCPRO4 (oldpoint, oldbegv, oldzv, old_deactivate_mark); |
12adba34 | 318 | |
6f0429a9 | 319 | if (PT == Z) |
bab29e15 | 320 | point_at_end = 1; |
6f0429a9 | 321 | if (ZV == Z) |
bab29e15 | 322 | zv_at_end = 1; |
12adba34 RS |
323 | |
324 | BEGV = BEG; | |
325 | BEGV_BYTE = BEG_BYTE; | |
326 | ZV = Z; | |
327 | ZV_BYTE = Z_BYTE; | |
328 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
bab29e15 RS |
329 | |
330 | /* Insert the string--maybe converting multibyte to single byte | |
331 | or vice versa, so that all the text fits the buffer. */ | |
0a9dc68b | 332 | if (multibyte |
bab29e15 RS |
333 | && NILP (current_buffer->enable_multibyte_characters)) |
334 | { | |
a45dc86e KH |
335 | int i, c, nbytes; |
336 | unsigned char work[1]; | |
bab29e15 RS |
337 | /* Convert a multibyte string to single-byte |
338 | for the *Message* buffer. */ | |
a45dc86e | 339 | for (i = 0; i < len; i += nbytes) |
bab29e15 | 340 | { |
a45dc86e KH |
341 | c = STRING_CHAR_AND_LENGTH (m + i, len - i, nbytes); |
342 | work[0] = (SINGLE_BYTE_CHAR_P (c) | |
343 | ? c | |
344 | : multibyte_char_to_unibyte (c, Qnil)); | |
345 | insert_1_both (work, 1, 1, 1, 0, 0); | |
bab29e15 RS |
346 | } |
347 | } | |
0a9dc68b | 348 | else if (! multibyte |
bab29e15 RS |
349 | && ! NILP (current_buffer->enable_multibyte_characters)) |
350 | { | |
a45dc86e | 351 | int i, c, nbytes; |
bd4f53cc | 352 | unsigned char *msg = (unsigned char *) m; |
a45dc86e | 353 | unsigned char *str, work[4]; |
bab29e15 RS |
354 | /* Convert a single-byte string to multibyte |
355 | for the *Message* buffer. */ | |
a45dc86e | 356 | for (i = 0; i < len; i++) |
bab29e15 | 357 | { |
a45dc86e KH |
358 | c = unibyte_char_to_multibyte (msg[i]); |
359 | nbytes = CHAR_STRING (c, work, str); | |
360 | insert_1_both (work, 1, nbytes, 1, 0, 0); | |
bab29e15 RS |
361 | } |
362 | } | |
363 | else if (len) | |
12adba34 | 364 | insert_1 (m, len, 1, 0, 0); |
bab29e15 | 365 | |
f88eb0b6 | 366 | if (nlflag) |
5992c4f7 | 367 | { |
12adba34 RS |
368 | int this_bol, this_bol_byte, prev_bol, prev_bol_byte, dup; |
369 | insert_1 ("\n", 1, 1, 0, 0); | |
370 | ||
371 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, -2, 0); | |
372 | this_bol = PT; | |
373 | this_bol_byte = PT_BYTE; | |
ff6c30e5 | 374 | |
ff6c30e5 KH |
375 | if (this_bol > BEG) |
376 | { | |
6f0429a9 | 377 | scan_newline (PT, PT_BYTE, BEG, BEG_BYTE, -2, 0); |
12adba34 RS |
378 | prev_bol = PT; |
379 | prev_bol_byte = PT_BYTE; | |
380 | ||
2d3ae3f0 KH |
381 | dup = message_log_check_duplicate (prev_bol, prev_bol_byte, |
382 | this_bol, this_bol_byte); | |
ff6c30e5 KH |
383 | if (dup) |
384 | { | |
bc69581b KH |
385 | del_range_both (prev_bol, prev_bol_byte, |
386 | this_bol, this_bol_byte, 0); | |
ff6c30e5 KH |
387 | if (dup > 1) |
388 | { | |
389 | char dupstr[40]; | |
390 | int duplen; | |
391 | ||
392 | /* If you change this format, don't forget to also | |
393 | change message_log_check_duplicate. */ | |
394 | sprintf (dupstr, " [%d times]", dup); | |
395 | duplen = strlen (dupstr); | |
12adba34 RS |
396 | TEMP_SET_PT_BOTH (Z - 1, Z_BYTE - 1); |
397 | insert_1 (dupstr, duplen, 1, 0, 1); | |
ff6c30e5 KH |
398 | } |
399 | } | |
400 | } | |
401 | ||
402 | if (NATNUMP (Vmessage_log_max)) | |
403 | { | |
12adba34 RS |
404 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, |
405 | -XFASTINT (Vmessage_log_max) - 1, 0); | |
bc69581b | 406 | del_range_both (BEG, BEG_BYTE, PT, PT_BYTE, 0); |
ff6c30e5 | 407 | } |
5992c4f7 | 408 | } |
12adba34 RS |
409 | BEGV = XMARKER (oldbegv)->charpos; |
410 | BEGV_BYTE = marker_byte_position (oldbegv); | |
411 | ||
bab29e15 | 412 | if (zv_at_end) |
12adba34 RS |
413 | { |
414 | ZV = Z; | |
415 | ZV_BYTE = Z_BYTE; | |
416 | } | |
bab29e15 | 417 | else |
12adba34 RS |
418 | { |
419 | ZV = XMARKER (oldzv)->charpos; | |
420 | ZV_BYTE = marker_byte_position (oldzv); | |
421 | } | |
422 | ||
bab29e15 | 423 | if (point_at_end) |
12adba34 | 424 | TEMP_SET_PT_BOTH (Z, Z_BYTE); |
bab29e15 | 425 | else |
a45dc86e KH |
426 | /* We can't do Fgoto_char (oldpoint) because it will run some |
427 | Lisp code. */ | |
428 | TEMP_SET_PT_BOTH (XMARKER (oldpoint)->charpos, | |
429 | XMARKER (oldpoint)->bytepos); | |
12adba34 | 430 | |
43c158ed | 431 | UNGCPRO; |
12adba34 RS |
432 | free_marker (oldpoint); |
433 | free_marker (oldbegv); | |
434 | free_marker (oldzv); | |
435 | ||
e18a235e | 436 | tem = Fget_buffer_window (Fcurrent_buffer (), Qt); |
5992c4f7 | 437 | set_buffer_internal (oldbuf); |
e18a235e RS |
438 | if (NILP (tem)) |
439 | windows_or_buffers_changed = old_windows_or_buffers_changed; | |
3c6595e0 | 440 | message_log_need_newline = !nlflag; |
84dd0ae5 | 441 | Vdeactivate_mark = old_deactivate_mark; |
5992c4f7 | 442 | } |
f88eb0b6 KH |
443 | } |
444 | ||
ff6c30e5 KH |
445 | /* We are at the end of the buffer after just having inserted a newline. |
446 | (Note: We depend on the fact we won't be crossing the gap.) | |
447 | Check to see if the most recent message looks a lot like the previous one. | |
448 | Return 0 if different, 1 if the new one should just replace it, or a | |
449 | value N > 1 if we should also append " [N times]". */ | |
f82aff7c | 450 | |
ff6c30e5 | 451 | static int |
12adba34 | 452 | message_log_check_duplicate (prev_bol, prev_bol_byte, this_bol, this_bol_byte) |
ff6c30e5 | 453 | int prev_bol, this_bol; |
12adba34 | 454 | int prev_bol_byte, this_bol_byte; |
ff6c30e5 KH |
455 | { |
456 | int i; | |
45726261 | 457 | int len = Z_BYTE - 1 - this_bol_byte; |
ff6c30e5 | 458 | int seen_dots = 0; |
12adba34 RS |
459 | unsigned char *p1 = BUF_BYTE_ADDRESS (current_buffer, prev_bol_byte); |
460 | unsigned char *p2 = BUF_BYTE_ADDRESS (current_buffer, this_bol_byte); | |
ff6c30e5 KH |
461 | |
462 | for (i = 0; i < len; i++) | |
463 | { | |
464 | if (i >= 3 && p1[i-3] == '.' && p1[i-2] == '.' && p1[i-1] == '.' | |
465 | && p1[i] != '\n') | |
466 | seen_dots = 1; | |
467 | if (p1[i] != p2[i]) | |
468 | return seen_dots; | |
469 | } | |
470 | p1 += len; | |
471 | if (*p1 == '\n') | |
472 | return 2; | |
473 | if (*p1++ == ' ' && *p1++ == '[') | |
474 | { | |
475 | int n = 0; | |
476 | while (*p1 >= '0' && *p1 <= '9') | |
477 | n = n * 10 + *p1++ - '0'; | |
478 | if (strncmp (p1, " times]\n", 8) == 0) | |
479 | return n+1; | |
480 | } | |
481 | return 0; | |
482 | } | |
1adc55de | 483 | \f |
f88eb0b6 | 484 | /* Display an echo area message M with a specified length of LEN chars. |
1adc55de | 485 | The string may include null characters. If M is 0, clear out any |
f88eb0b6 | 486 | existing message, and let the minibuffer text show through. |
1adc55de RS |
487 | |
488 | The buffer M must continue to exist until after the echo area | |
489 | gets cleared or some other message gets displayed there. | |
490 | ||
491 | Do not pass text that is stored in a Lisp string. | |
492 | Do not pass text in a buffer that was alloca'd. */ | |
f88eb0b6 KH |
493 | |
494 | void | |
0a9dc68b | 495 | message2 (m, len, multibyte) |
f88eb0b6 KH |
496 | char *m; |
497 | int len; | |
0a9dc68b | 498 | int multibyte; |
f88eb0b6 KH |
499 | { |
500 | /* First flush out any partial line written with print. */ | |
3c6595e0 | 501 | message_log_maybe_newline (); |
f88eb0b6 | 502 | if (m) |
0a9dc68b RS |
503 | message_dolog (m, len, 1, multibyte); |
504 | message2_nolog (m, len, multibyte); | |
5992c4f7 KH |
505 | } |
506 | ||
507 | ||
1adc55de | 508 | /* The non-logging counterpart of message2. */ |
5992c4f7 KH |
509 | |
510 | void | |
44461111 | 511 | message2_nolog (m, len, multibyte) |
5992c4f7 KH |
512 | char *m; |
513 | int len; | |
90adcf20 | 514 | { |
44461111 | 515 | message_enable_multibyte = multibyte; |
a3788d53 | 516 | |
90adcf20 RS |
517 | if (noninteractive) |
518 | { | |
519 | if (noninteractive_need_newline) | |
520 | putc ('\n', stderr); | |
521 | noninteractive_need_newline = 0; | |
c3597849 RS |
522 | if (m) |
523 | fwrite (m, len, 1, stderr); | |
90adcf20 RS |
524 | if (cursor_in_echo_area == 0) |
525 | fprintf (stderr, "\n"); | |
526 | fflush (stderr); | |
527 | } | |
528 | /* A null message buffer means that the frame hasn't really been | |
529 | initialized yet. Error messages get reported properly by | |
530 | cmd_error, so this must be just an informative message; toss it. */ | |
531 | else if (INTERACTIVE && FRAME_MESSAGE_BUF (selected_frame)) | |
532 | { | |
73af359d RS |
533 | Lisp_Object mini_window; |
534 | FRAME_PTR f; | |
90adcf20 | 535 | |
73af359d RS |
536 | /* Get the frame containing the minibuffer |
537 | that the selected frame is using. */ | |
538 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
539 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
540 | ||
73af359d | 541 | FRAME_SAMPLE_VISIBILITY (f); |
90adcf20 | 542 | if (FRAME_VISIBLE_P (selected_frame) |
73af359d RS |
543 | && ! FRAME_VISIBLE_P (f)) |
544 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window))); | |
90adcf20 RS |
545 | |
546 | if (m) | |
547 | { | |
548 | echo_area_glyphs = m; | |
549 | echo_area_glyphs_length = len; | |
b6436d4e RS |
550 | |
551 | if (minibuffer_auto_raise) | |
552 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); | |
90adcf20 | 553 | } |
ded34426 JB |
554 | else |
555 | echo_area_glyphs = previous_echo_glyphs = 0; | |
556 | ||
557 | do_pending_window_change (); | |
558 | echo_area_display (); | |
73af359d | 559 | update_frame (f, 1, 1); |
ded34426 | 560 | do_pending_window_change (); |
853cf346 | 561 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
73af359d | 562 | (*frame_up_to_date_hook) (f); |
ded34426 JB |
563 | } |
564 | } | |
1adc55de | 565 | \f |
0a9dc68b RS |
566 | /* Display in echo area the null-terminated ASCII-only string M. |
567 | If M is 0, clear out any existing message, | |
568 | and let the minibuffer text show through. | |
1adc55de | 569 | |
0a9dc68b | 570 | The string M must continue to exist until after the echo area |
1adc55de RS |
571 | gets cleared or some other message gets displayed there. |
572 | ||
573 | Do not pass text that is stored in a Lisp string. | |
574 | Do not pass text in a buffer that was alloca'd. */ | |
ded34426 | 575 | |
48ae5f0a KH |
576 | void |
577 | message1 (m) | |
578 | char *m; | |
579 | { | |
0a9dc68b | 580 | message2 (m, (m ? strlen (m) : 0), 0); |
48ae5f0a KH |
581 | } |
582 | ||
0b1005ef KH |
583 | void |
584 | message1_nolog (m) | |
585 | char *m; | |
586 | { | |
0a9dc68b RS |
587 | message2_nolog (m, (m ? strlen (m) : 0), 0); |
588 | } | |
589 | ||
590 | /* Display a message M which contains a single %s | |
591 | which gets replaced with STRING. */ | |
592 | ||
593 | void | |
594 | message_with_string (m, string, log) | |
595 | char *m; | |
596 | Lisp_Object string; | |
597 | int log; | |
598 | { | |
599 | if (noninteractive) | |
600 | { | |
601 | if (m) | |
602 | { | |
603 | if (noninteractive_need_newline) | |
604 | putc ('\n', stderr); | |
605 | noninteractive_need_newline = 0; | |
606 | fprintf (stderr, m, XSTRING (string)->data); | |
607 | if (cursor_in_echo_area == 0) | |
608 | fprintf (stderr, "\n"); | |
609 | fflush (stderr); | |
610 | } | |
611 | } | |
612 | else if (INTERACTIVE) | |
613 | { | |
614 | /* The frame whose minibuffer we're going to display the message on. | |
615 | It may be larger than the selected frame, so we need | |
616 | to use its buffer, not the selected frame's buffer. */ | |
617 | Lisp_Object mini_window; | |
618 | FRAME_PTR f; | |
619 | ||
620 | /* Get the frame containing the minibuffer | |
621 | that the selected frame is using. */ | |
622 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
623 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
624 | ||
625 | /* A null message buffer means that the frame hasn't really been | |
626 | initialized yet. Error messages get reported properly by | |
627 | cmd_error, so this must be just an informative message; toss it. */ | |
628 | if (FRAME_MESSAGE_BUF (f)) | |
629 | { | |
630 | int len; | |
631 | char *a[1]; | |
632 | a[0] = (char *) XSTRING (string)->data; | |
633 | ||
634 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
635 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); | |
636 | ||
637 | if (log) | |
638 | message2 (FRAME_MESSAGE_BUF (f), len, | |
639 | STRING_MULTIBYTE (string)); | |
640 | else | |
641 | message2_nolog (FRAME_MESSAGE_BUF (f), len, | |
642 | STRING_MULTIBYTE (string)); | |
643 | ||
644 | /* Print should start at the beginning of the message | |
645 | buffer next time. */ | |
646 | message_buf_print = 0; | |
647 | } | |
648 | } | |
0b1005ef KH |
649 | } |
650 | ||
76412d64 RS |
651 | /* Truncate what will be displayed in the echo area |
652 | the next time we display it--but don't redisplay it now. */ | |
653 | ||
654 | void | |
655 | truncate_echo_area (len) | |
656 | int len; | |
657 | { | |
658 | /* A null message buffer means that the frame hasn't really been | |
659 | initialized yet. Error messages get reported properly by | |
660 | cmd_error, so this must be just an informative message; toss it. */ | |
661 | if (!noninteractive && INTERACTIVE && FRAME_MESSAGE_BUF (selected_frame)) | |
662 | echo_area_glyphs_length = len; | |
663 | } | |
664 | ||
44fa5b1e | 665 | /* Nonzero if FRAME_MESSAGE_BUF (selected_frame) is being used by print; |
9c74a0dd JB |
666 | zero if being used by message. */ |
667 | int message_buf_print; | |
668 | ||
1adc55de | 669 | /* Dump an informative message to the minibuf. If M is 0, clear out |
81d478f3 | 670 | any existing message, and let the minibuffer text show through. */ |
1adc55de | 671 | |
a2889657 | 672 | /* VARARGS 1 */ |
a2889657 JB |
673 | void |
674 | message (m, a1, a2, a3) | |
675 | char *m; | |
5d5ed907 | 676 | EMACS_INT a1, a2, a3; |
a2889657 JB |
677 | { |
678 | if (noninteractive) | |
679 | { | |
81d478f3 JB |
680 | if (m) |
681 | { | |
682 | if (noninteractive_need_newline) | |
683 | putc ('\n', stderr); | |
684 | noninteractive_need_newline = 0; | |
685 | fprintf (stderr, m, a1, a2, a3); | |
c4f14ccb RS |
686 | if (cursor_in_echo_area == 0) |
687 | fprintf (stderr, "\n"); | |
81d478f3 JB |
688 | fflush (stderr); |
689 | } | |
a2889657 | 690 | } |
1f40cad2 | 691 | else if (INTERACTIVE) |
a2889657 | 692 | { |
1f40cad2 JB |
693 | /* The frame whose minibuffer we're going to display the message on. |
694 | It may be larger than the selected frame, so we need | |
695 | to use its buffer, not the selected frame's buffer. */ | |
73af359d RS |
696 | Lisp_Object mini_window; |
697 | FRAME_PTR f; | |
698 | ||
699 | /* Get the frame containing the minibuffer | |
700 | that the selected frame is using. */ | |
701 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
702 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
1f40cad2 JB |
703 | |
704 | /* A null message buffer means that the frame hasn't really been | |
705 | initialized yet. Error messages get reported properly by | |
706 | cmd_error, so this must be just an informative message; toss it. */ | |
73af359d | 707 | if (FRAME_MESSAGE_BUF (f)) |
81d478f3 | 708 | { |
1f40cad2 JB |
709 | if (m) |
710 | { | |
90adcf20 | 711 | int len; |
a2889657 | 712 | #ifdef NO_ARG_ARRAY |
d5315282 AS |
713 | char *a[3]; |
714 | a[0] = (char *) a1; | |
715 | a[1] = (char *) a2; | |
716 | a[2] = (char *) a3; | |
a2889657 | 717 | |
73af359d | 718 | len = doprnt (FRAME_MESSAGE_BUF (f), |
1c9241f5 | 719 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); |
a2889657 | 720 | #else |
73af359d | 721 | len = doprnt (FRAME_MESSAGE_BUF (f), |
12adba34 RS |
722 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, |
723 | (char **) &a1); | |
1f40cad2 | 724 | #endif /* NO_ARG_ARRAY */ |
1f40cad2 | 725 | |
0a9dc68b | 726 | message2 (FRAME_MESSAGE_BUF (f), len, 0); |
1f40cad2 JB |
727 | } |
728 | else | |
729 | message1 (0); | |
730 | ||
731 | /* Print should start at the beginning of the message | |
732 | buffer next time. */ | |
733 | message_buf_print = 0; | |
81d478f3 | 734 | } |
a2889657 JB |
735 | } |
736 | } | |
737 | ||
1adc55de | 738 | /* The non-logging version of message. */ |
6c4429a5 KH |
739 | void |
740 | message_nolog (m, a1, a2, a3) | |
741 | char *m; | |
742 | EMACS_INT a1, a2, a3; | |
743 | { | |
744 | Lisp_Object old_log_max; | |
745 | old_log_max = Vmessage_log_max; | |
746 | Vmessage_log_max = Qnil; | |
747 | message (m, a1, a2, a3); | |
748 | Vmessage_log_max = old_log_max; | |
749 | } | |
750 | ||
131f2133 RS |
751 | void |
752 | update_echo_area () | |
753 | { | |
0a9dc68b RS |
754 | message2 (echo_area_glyphs, echo_area_glyphs_length, |
755 | ! NILP (current_buffer->enable_multibyte_characters)); | |
131f2133 | 756 | } |
1adc55de | 757 | \f |
a2889657 JB |
758 | static void |
759 | echo_area_display () | |
760 | { | |
761 | register int vpos; | |
44fa5b1e | 762 | FRAME_PTR f; |
73af359d | 763 | Lisp_Object mini_window; |
a2889657 | 764 | |
73af359d RS |
765 | /* Choose the minibuffer window for this display. |
766 | It is the minibuffer window used by the selected frame. */ | |
767 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
768 | /* This is the frame that window is in. */ | |
769 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
a2889657 | 770 | |
44fa5b1e | 771 | if (! FRAME_VISIBLE_P (f)) |
a2889657 | 772 | return; |
a2889657 | 773 | |
44fa5b1e | 774 | if (frame_garbaged) |
a2889657 | 775 | { |
02a9b6e4 | 776 | redraw_garbaged_frames (); |
44fa5b1e | 777 | frame_garbaged = 0; |
a2889657 JB |
778 | } |
779 | ||
780 | if (echo_area_glyphs || minibuf_level == 0) | |
781 | { | |
a2f016e3 RS |
782 | int i; |
783 | ||
73af359d RS |
784 | echo_area_window = mini_window; |
785 | ||
786 | vpos = XFASTINT (XWINDOW (mini_window)->top); | |
44fa5b1e | 787 | get_display_line (f, vpos, 0); |
a2f016e3 RS |
788 | |
789 | /* Make sure the columns that overlap a left-hand scroll bar | |
790 | are always clear. */ | |
791 | for (i = 0; i < FRAME_LEFT_SCROLL_BAR_WIDTH (f); i++) | |
792 | f->desired_glyphs->glyphs[vpos][i] = SPACEGLYPH; | |
793 | ||
73af359d | 794 | display_string (XWINDOW (mini_window), vpos, |
a2889657 | 795 | echo_area_glyphs ? echo_area_glyphs : "", |
90adcf20 | 796 | echo_area_glyphs ? echo_area_glyphs_length : -1, |
73f194f1 | 797 | FRAME_LEFT_SCROLL_BAR_WIDTH (f), |
21e989e3 | 798 | 0, 0, 0, |
a3788d53 RS |
799 | FRAME_WIDTH (f) + FRAME_LEFT_SCROLL_BAR_WIDTH (f), |
800 | message_enable_multibyte); | |
a2889657 | 801 | |
b6f0fe04 | 802 | #if 0 /* This just gets in the way. update_frame does the job. */ |
a2889657 | 803 | /* If desired cursor location is on this line, put it at end of text */ |
b5bbc9a5 KH |
804 | if (cursor_in_echo_area) |
805 | FRAME_CURSOR_Y (f) = vpos; | |
44fa5b1e JB |
806 | if (FRAME_CURSOR_Y (f) == vpos) |
807 | FRAME_CURSOR_X (f) = FRAME_DESIRED_GLYPHS (f)->used[vpos]; | |
b6f0fe04 | 808 | #endif |
daa37602 JB |
809 | |
810 | /* Fill the rest of the minibuffer window with blank lines. */ | |
811 | { | |
812 | int i; | |
813 | ||
b2a76982 | 814 | for (i = vpos + 1; |
73af359d | 815 | i < vpos + XFASTINT (XWINDOW (mini_window)->height); i++) |
daa37602 | 816 | { |
44fa5b1e | 817 | get_display_line (f, i, 0); |
b8333774 RS |
818 | /* We don't use FRAME_SCROLL_BAR_WIDTH (f) as the starting |
819 | hpos, because it is good to clear whatever is behind the | |
820 | scroll bar. This does not affect the scroll bar itself. */ | |
e88dcae1 | 821 | display_string (XWINDOW (mini_window), i, |
73f194f1 | 822 | "", 0, |
b8333774 | 823 | 0, 0, 0, |
a3788d53 RS |
824 | 0, FRAME_WIDTH (f) + FRAME_SCROLL_BAR_WIDTH (f), |
825 | 0); | |
daa37602 JB |
826 | } |
827 | } | |
a2889657 | 828 | } |
73af359d | 829 | else if (!EQ (mini_window, selected_window)) |
a2889657 JB |
830 | windows_or_buffers_changed++; |
831 | ||
73af359d | 832 | if (EQ (mini_window, selected_window)) |
a2889657 JB |
833 | this_line_bufpos = 0; |
834 | ||
835 | previous_echo_glyphs = echo_area_glyphs; | |
836 | } | |
1adc55de RS |
837 | \f |
838 | /* Update frame titles. */ | |
96a410bc | 839 | |
8f3343d0 | 840 | #ifdef HAVE_WINDOW_SYSTEM |
d39b6696 KH |
841 | static char frame_title_buf[512]; |
842 | static char *frame_title_ptr; | |
96a410bc | 843 | |
d39b6696 KH |
844 | static int |
845 | store_frame_title (str, mincol, maxcol) | |
846 | char *str; | |
847 | int mincol, maxcol; | |
848 | { | |
849 | char *limit; | |
850 | if (maxcol < 0 || maxcol >= sizeof(frame_title_buf)) | |
851 | maxcol = sizeof (frame_title_buf); | |
852 | limit = &frame_title_buf[maxcol]; | |
853 | while (*str != '\0' && frame_title_ptr < limit) | |
854 | *frame_title_ptr++ = *str++; | |
855 | while (frame_title_ptr < &frame_title_buf[mincol]) | |
856 | *frame_title_ptr++ = ' '; | |
857 | return frame_title_ptr - frame_title_buf; | |
858 | } | |
96a410bc | 859 | |
96a410bc KH |
860 | static void |
861 | x_consider_frame_title (frame) | |
862 | Lisp_Object frame; | |
863 | { | |
d39b6696 KH |
864 | Lisp_Object fmt; |
865 | struct buffer *obuf; | |
866 | int len; | |
96a410bc KH |
867 | FRAME_PTR f = XFRAME (frame); |
868 | ||
8f3343d0 | 869 | if (!(FRAME_WINDOW_P (f) || FRAME_MINIBUF_ONLY_P (f) || f->explicit_name)) |
d39b6696 | 870 | return; |
3450d04c KH |
871 | |
872 | /* Do we have more than one visible frame on this X display? */ | |
873 | { | |
874 | Lisp_Object tail; | |
875 | ||
876 | for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr) | |
877 | { | |
878 | FRAME_PTR tf = XFRAME (XCONS (tail)->car); | |
879 | ||
c9492f08 KH |
880 | if (tf != f && FRAME_KBOARD (tf) == FRAME_KBOARD (f) |
881 | && !FRAME_MINIBUF_ONLY_P (tf) | |
3450d04c KH |
882 | && (FRAME_VISIBLE_P (tf) || FRAME_ICONIFIED_P (tf))) |
883 | break; | |
884 | } | |
885 | ||
886 | multiple_frames = CONSP (tail); | |
887 | } | |
888 | ||
d39b6696 KH |
889 | obuf = current_buffer; |
890 | Fset_buffer (XWINDOW (f->selected_window)->buffer); | |
891 | fmt = (FRAME_ICONIFIED_P (f) ? Vicon_title_format : Vframe_title_format); | |
892 | frame_title_ptr = frame_title_buf; | |
893 | len = display_mode_element (XWINDOW (f->selected_window), 0, 0, 0, | |
894 | 0, sizeof (frame_title_buf), fmt); | |
895 | frame_title_ptr = 0; | |
896 | set_buffer_internal (obuf); | |
897 | /* Set the name only if it's changed. This avoids consing | |
898 | in the common case where it hasn't. (If it turns out that we've | |
899 | already wasted too much time by walking through the list with | |
900 | display_mode_element, then we might need to optimize at a higher | |
901 | level than this.) */ | |
fc932ac6 | 902 | if (! STRINGP (f->name) || STRING_BYTES (XSTRING (f->name)) != len |
d39b6696 KH |
903 | || bcmp (frame_title_buf, XSTRING (f->name)->data, len) != 0) |
904 | x_implicitly_set_name (f, make_string (frame_title_buf, len), Qnil); | |
96a410bc | 905 | } |
c7c9ca97 KH |
906 | #else |
907 | #define frame_title_ptr ((char *)0) | |
e39322d9 | 908 | #define store_frame_title(str, mincol, maxcol) 0 |
96a410bc | 909 | #endif |
a2889657 | 910 | \f |
90adcf20 | 911 | /* Prepare for redisplay by updating menu-bar item lists when appropriate. |
87382820 | 912 | This can call eval. */ |
90adcf20 RS |
913 | |
914 | void | |
915 | prepare_menu_bars () | |
916 | { | |
917 | register struct window *w = XWINDOW (selected_window); | |
918 | int all_windows; | |
08b610e4 | 919 | struct gcpro gcpro1, gcpro2; |
90adcf20 | 920 | |
ecf7de9b | 921 | all_windows = (update_mode_lines || buffer_shared > 1 |
28995e67 | 922 | || windows_or_buffers_changed); |
90adcf20 | 923 | |
feb0c42f KH |
924 | /* Update all frame titles based on their buffer names, etc. |
925 | We do this before the menu bars so that the buffer-menu | |
926 | will show the up-to-date frame titles. | |
927 | ||
928 | This used to be done after the menu bars, for a reason that | |
929 | was stated as follows but which I do not understand: | |
930 | "We do this after the menu bars so that the frame will first | |
931 | create its menu bar using the name `emacs' if no other name | |
932 | has yet been specified." | |
933 | I think that is no longer a concern. */ | |
8f3343d0 | 934 | #ifdef HAVE_WINDOW_SYSTEM |
d3f46cff | 935 | if (windows_or_buffers_changed || update_mode_lines) |
feb0c42f KH |
936 | { |
937 | Lisp_Object tail, frame; | |
938 | ||
939 | FOR_EACH_FRAME (tail, frame) | |
940 | if (FRAME_VISIBLE_P (XFRAME (frame)) | |
941 | || FRAME_ICONIFIED_P (XFRAME (frame))) | |
942 | x_consider_frame_title (frame); | |
943 | } | |
944 | #endif | |
945 | ||
90adcf20 RS |
946 | /* Update the menu bar item lists, if appropriate. |
947 | This has to be done before any actual redisplay | |
948 | or generation of display lines. */ | |
949 | if (all_windows) | |
950 | { | |
951 | Lisp_Object tail, frame; | |
a2725ab2 RS |
952 | int count = specpdl_ptr - specpdl; |
953 | ||
84dd0ae5 | 954 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); |
90adcf20 RS |
955 | |
956 | FOR_EACH_FRAME (tail, frame) | |
08b610e4 RS |
957 | { |
958 | /* If a window on this frame changed size, | |
959 | report that to the user and clear the size-change flag. */ | |
960 | if (FRAME_WINDOW_SIZES_CHANGED (XFRAME (frame))) | |
961 | { | |
962 | Lisp_Object functions; | |
14510fee RS |
963 | /* Clear flag first in case we get error below. */ |
964 | FRAME_WINDOW_SIZES_CHANGED (XFRAME (frame)) = 0; | |
08b610e4 RS |
965 | functions = Vwindow_size_change_functions; |
966 | GCPRO2 (tail, functions); | |
967 | while (CONSP (functions)) | |
968 | { | |
969 | call1 (XCONS (functions)->car, frame); | |
970 | functions = XCONS (functions)->cdr; | |
971 | } | |
972 | UNGCPRO; | |
08b610e4 RS |
973 | } |
974 | GCPRO1 (tail); | |
a2725ab2 | 975 | update_menu_bar (XFRAME (frame), 0); |
08b610e4 RS |
976 | UNGCPRO; |
977 | } | |
a2725ab2 RS |
978 | |
979 | unbind_to (count, Qnil); | |
90adcf20 | 980 | } |
ecf7de9b | 981 | else |
a2725ab2 | 982 | update_menu_bar (selected_frame, 1); |
cd6dfed6 RS |
983 | |
984 | /* Motif needs this. See comment in xmenu.c. | |
985 | Turn it off when pending_menu_activation is not defined. */ | |
986 | #ifdef USE_X_TOOLKIT | |
987 | pending_menu_activation = 0; | |
988 | #endif | |
90adcf20 RS |
989 | } |
990 | \f | |
44fa5b1e | 991 | /* Do a frame update, taking possible shortcuts into account. |
a2889657 JB |
992 | This is the main external entry point for redisplay. |
993 | ||
994 | If the last redisplay displayed an echo area message and that | |
995 | message is no longer requested, we clear the echo area | |
996 | or bring back the minibuffer if that is in use. | |
997 | ||
90adcf20 RS |
998 | Do not call eval from within this function. |
999 | Calls to eval after the call to echo_area_display would confuse | |
1000 | the display_line mechanism and would cause a crash. | |
1001 | Calls to eval before that point will work most of the time, | |
1002 | but can still lose, because this function | |
1003 | can be called from signal handlers; with alarms set up; | |
a2889657 | 1004 | or with synchronous processes running. |
90adcf20 | 1005 | |
a2889657 JB |
1006 | See Fcall_process; if you called it from here, it could be |
1007 | entered recursively. */ | |
1008 | ||
0d231165 RS |
1009 | static int do_verify_charstarts; |
1010 | ||
463f6b91 RS |
1011 | /* Counter is used to clear the face cache |
1012 | no more than once ever 1000 redisplays. */ | |
1013 | static int clear_face_cache_count; | |
1014 | ||
20de20dc RS |
1015 | /* Record the previous terminal frame we displayed. */ |
1016 | static FRAME_PTR previous_terminal_frame; | |
1017 | ||
a2889657 JB |
1018 | void |
1019 | redisplay () | |
e9874cee RS |
1020 | { |
1021 | redisplay_internal (0); | |
1022 | } | |
1023 | ||
1024 | /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay | |
1025 | is not in response to any user action; therefore, we should | |
94a66eea RS |
1026 | preserve the echo area. (Actually, our caller does that job.) |
1027 | Perhaps in the future avoid recentering windows | |
e9874cee RS |
1028 | if it is not necessary; currently that causes some problems. */ |
1029 | ||
1030 | static void | |
1031 | redisplay_internal (preserve_echo_area) | |
1032 | int preserve_echo_area; | |
a2889657 JB |
1033 | { |
1034 | register struct window *w = XWINDOW (selected_window); | |
1035 | register int pause; | |
1036 | int must_finish = 0; | |
1037 | int all_windows; | |
1038 | register int tlbufpos, tlendpos; | |
1039 | struct position pos; | |
89819bdd | 1040 | int number_of_visible_frames; |
a2889657 JB |
1041 | |
1042 | if (noninteractive) | |
1043 | return; | |
1044 | ||
15f0cf78 RS |
1045 | #ifdef USE_X_TOOLKIT |
1046 | if (popup_activated ()) | |
1047 | return; | |
1048 | #endif | |
1049 | ||
735c094c KH |
1050 | if (! NILP (Vinhibit_redisplay)) |
1051 | return; | |
1052 | ||
8b32d885 RS |
1053 | retry: |
1054 | ||
fd8ff63d | 1055 | if (! FRAME_WINDOW_P (selected_frame) |
20de20dc RS |
1056 | && previous_terminal_frame != selected_frame) |
1057 | { | |
1058 | /* Since frames on an ASCII terminal share the same display area, | |
1059 | displaying a different frame means redisplay the whole thing. */ | |
1060 | windows_or_buffers_changed++; | |
1061 | SET_FRAME_GARBAGED (selected_frame); | |
1062 | XSETFRAME (Vterminal_frame, selected_frame); | |
1063 | } | |
1064 | previous_terminal_frame = selected_frame; | |
20de20dc | 1065 | |
d724d989 JB |
1066 | /* Set the visible flags for all frames. |
1067 | Do this before checking for resized or garbaged frames; they want | |
1068 | to know if their frames are visible. | |
1069 | See the comment in frame.h for FRAME_SAMPLE_VISIBILITY. */ | |
1070 | { | |
35f56f96 | 1071 | Lisp_Object tail, frame; |
d724d989 | 1072 | |
89819bdd RS |
1073 | number_of_visible_frames = 0; |
1074 | ||
35f56f96 | 1075 | FOR_EACH_FRAME (tail, frame) |
f82aff7c RS |
1076 | { |
1077 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
1078 | ||
8e83f802 RS |
1079 | if (FRAME_VISIBLE_P (XFRAME (frame))) |
1080 | number_of_visible_frames++; | |
89819bdd | 1081 | |
f82aff7c RS |
1082 | /* Clear out all the display lines in which we will generate the |
1083 | glyphs to display. */ | |
1084 | init_desired_glyphs (XFRAME (frame)); | |
1085 | } | |
d724d989 JB |
1086 | } |
1087 | ||
44fa5b1e | 1088 | /* Notice any pending interrupt request to change frame size. */ |
a2889657 JB |
1089 | do_pending_window_change (); |
1090 | ||
44fa5b1e | 1091 | if (frame_garbaged) |
a2889657 | 1092 | { |
02a9b6e4 | 1093 | redraw_garbaged_frames (); |
44fa5b1e | 1094 | frame_garbaged = 0; |
a2889657 JB |
1095 | } |
1096 | ||
f82aff7c RS |
1097 | prepare_menu_bars (); |
1098 | ||
28995e67 | 1099 | if (windows_or_buffers_changed) |
a2889657 JB |
1100 | update_mode_lines++; |
1101 | ||
538f13d4 RS |
1102 | /* Detect case that we need to write or remove a star in the mode line. */ |
1103 | if ((SAVE_MODIFF < MODIFF) != !NILP (w->last_had_star)) | |
a2889657 JB |
1104 | { |
1105 | w->update_mode_line = Qt; | |
1106 | if (buffer_shared > 1) | |
1107 | update_mode_lines++; | |
1108 | } | |
1109 | ||
28995e67 RS |
1110 | /* If %c is in use, update it if needed. */ |
1111 | if (!NILP (w->column_number_displayed) | |
1112 | /* This alternative quickly identifies a common case | |
1113 | where no change is needed. */ | |
1114 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
1115 | && XFASTINT (w->last_modified) >= MODIFF |
1116 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
1117 | && XFASTINT (w->column_number_displayed) != current_column ()) |
1118 | w->update_mode_line = Qt; | |
1119 | ||
44fa5b1e | 1120 | FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w->frame)) = -1; |
a2889657 JB |
1121 | |
1122 | all_windows = update_mode_lines || buffer_shared > 1; | |
a2889657 JB |
1123 | |
1124 | /* If specs for an arrow have changed, do thorough redisplay | |
1125 | to ensure we remove any arrow that should no longer exist. */ | |
d45de95b | 1126 | if (! EQ (COERCE_MARKER (Voverlay_arrow_position), last_arrow_position) |
ded34426 | 1127 | || ! EQ (Voverlay_arrow_string, last_arrow_string)) |
28995e67 | 1128 | all_windows = 1; |
a2889657 | 1129 | |
90adcf20 RS |
1130 | /* Normally the message* functions will have already displayed and |
1131 | updated the echo area, but the frame may have been trashed, or | |
1132 | the update may have been preempted, so display the echo area | |
1133 | again here. */ | |
1134 | if (echo_area_glyphs || previous_echo_glyphs) | |
1135 | { | |
1136 | echo_area_display (); | |
1137 | must_finish = 1; | |
1138 | } | |
1139 | ||
bd66d1ba RS |
1140 | /* If showing region, and mark has changed, must redisplay whole window. */ |
1141 | if (((!NILP (Vtransient_mark_mode) | |
1142 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
1143 | != !NILP (w->region_showing)) | |
82d04750 JB |
1144 | || (!NILP (w->region_showing) |
1145 | && !EQ (w->region_showing, | |
1146 | Fmarker_position (XBUFFER (w->buffer)->mark)))) | |
bd66d1ba RS |
1147 | this_line_bufpos = -1; |
1148 | ||
a2889657 JB |
1149 | tlbufpos = this_line_bufpos; |
1150 | tlendpos = this_line_endpos; | |
265a9e55 | 1151 | if (!all_windows && tlbufpos > 0 && NILP (w->update_mode_line) |
73af359d | 1152 | && !current_buffer->clip_changed |
44fa5b1e | 1153 | && FRAME_VISIBLE_P (XFRAME (w->frame)) |
f21ef775 | 1154 | && !FRAME_OBSCURED_P (XFRAME (w->frame)) |
a2889657 JB |
1155 | /* Make sure recorded data applies to current buffer, etc */ |
1156 | && this_line_buffer == current_buffer | |
1157 | && current_buffer == XBUFFER (w->buffer) | |
265a9e55 | 1158 | && NILP (w->force_start) |
a2889657 | 1159 | /* Point must be on the line that we have info recorded about */ |
ae3b1442 KH |
1160 | && PT >= tlbufpos |
1161 | && PT <= Z - tlendpos | |
a2889657 JB |
1162 | /* All text outside that line, including its final newline, |
1163 | must be unchanged */ | |
8850a573 RS |
1164 | && ((XFASTINT (w->last_modified) >= MODIFF |
1165 | && (XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF)) | |
a2889657 JB |
1166 | || (beg_unchanged >= tlbufpos - 1 |
1167 | && GPT >= tlbufpos | |
05ba02eb JB |
1168 | /* If selective display, can't optimize |
1169 | if the changes start at the beginning of the line. */ | |
e24c997d | 1170 | && ((INTEGERP (current_buffer->selective_display) |
05ba02eb JB |
1171 | && XINT (current_buffer->selective_display) > 0 |
1172 | ? (beg_unchanged >= tlbufpos | |
1173 | && GPT > tlbufpos) | |
1174 | : 1)) | |
a2889657 JB |
1175 | && end_unchanged >= tlendpos |
1176 | && Z - GPT >= tlendpos))) | |
1177 | { | |
12adba34 RS |
1178 | int tlbufpos_byte = CHAR_TO_BYTE (tlbufpos); |
1179 | if (tlbufpos > BEGV && FETCH_BYTE (tlbufpos_byte - 1) != '\n' | |
a2889657 | 1180 | && (tlbufpos == ZV |
12adba34 | 1181 | || FETCH_BYTE (tlbufpos_byte) == '\n')) |
a2889657 JB |
1182 | /* Former continuation line has disappeared by becoming empty */ |
1183 | goto cancel; | |
1184 | else if (XFASTINT (w->last_modified) < MODIFF | |
8850a573 | 1185 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF |
a2889657 JB |
1186 | || MINI_WINDOW_P (w)) |
1187 | { | |
1c9241f5 KH |
1188 | /* We have to handle the case of continuation around a |
1189 | wide-column character (See the comment in indent.c around | |
1190 | line 885). | |
1191 | ||
1192 | For instance, in the following case: | |
1193 | ||
1194 | -------- Insert -------- | |
1195 | K_A_N_\\ `a' K_A_N_a\ `X_' are wide-column chars. | |
1196 | J_I_ ==> J_I_ `^^' are cursors. | |
1197 | ^^ ^^ | |
1198 | -------- -------- | |
1199 | ||
1200 | As we have to redraw the line above, we should goto cancel. */ | |
1201 | ||
1202 | struct position val; | |
1203 | int prevline; | |
12adba34 | 1204 | int opoint = PT, opoint_byte = PT_BYTE; |
1c9241f5 | 1205 | |
12adba34 RS |
1206 | scan_newline (tlbufpos, tlbufpos_byte, BEGV, BEGV_BYTE, -1, 1); |
1207 | ||
1208 | val = *compute_motion (PT, 0, | |
1c9241f5 KH |
1209 | XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0, |
1210 | 0, | |
1211 | tlbufpos, | |
1212 | 1 << (BITS_PER_SHORT - 1), | |
1213 | 1 << (BITS_PER_SHORT - 1), | |
1214 | window_internal_width (w) - 1, | |
1215 | XINT (w->hscroll), 0, w); | |
26a9b1f3 | 1216 | TEMP_SET_PT_BOTH (opoint, opoint_byte); |
1c9241f5 KH |
1217 | if (val.hpos != this_line_start_hpos) |
1218 | goto cancel; | |
1219 | ||
a2889657 JB |
1220 | cursor_vpos = -1; |
1221 | overlay_arrow_seen = 0; | |
ca26e1c8 | 1222 | zv_strings_seen = 0; |
12adba34 RS |
1223 | display_text_line (w, tlbufpos, tlbufpos_byte, |
1224 | this_line_vpos, this_line_start_hpos, | |
1225 | pos_tab_offset (w, tlbufpos, tlbufpos_byte), 0); | |
a2889657 JB |
1226 | /* If line contains point, is not continued, |
1227 | and ends at same distance from eob as before, we win */ | |
1228 | if (cursor_vpos >= 0 && this_line_bufpos | |
1229 | && this_line_endpos == tlendpos) | |
1230 | { | |
0d231165 RS |
1231 | /* If this is not the window's last line, |
1232 | we must adjust the charstarts of the lines below. */ | |
1233 | if (this_line_vpos + 1 | |
1234 | < XFASTINT (w->top) + window_internal_height (w)) | |
85bcef6c | 1235 | { |
73f194f1 | 1236 | int left = WINDOW_LEFT_MARGIN (w); |
85bcef6c RS |
1237 | int *charstart_next_line |
1238 | = FRAME_CURRENT_GLYPHS (XFRAME (WINDOW_FRAME (w)))->charstarts[this_line_vpos + 1]; | |
85bcef6c RS |
1239 | int adjust; |
1240 | ||
1241 | if (Z - tlendpos == ZV) | |
1242 | /* This line ends at end of (accessible part of) buffer. | |
1243 | There is no newline to count. */ | |
1244 | adjust = Z - tlendpos - charstart_next_line[left]; | |
1245 | else | |
1246 | /* This line ends in a newline. | |
1247 | Must take account of the newline and the rest of the | |
1248 | text that follows. */ | |
1249 | adjust = Z - tlendpos + 1 - charstart_next_line[left]; | |
1250 | ||
1251 | adjust_window_charstarts (w, this_line_vpos, adjust); | |
1252 | } | |
46db8486 | 1253 | |
73f194f1 | 1254 | if (!WINDOW_FULL_WIDTH_P (w)) |
a2889657 JB |
1255 | preserve_other_columns (w); |
1256 | goto update; | |
1257 | } | |
1258 | else | |
1259 | goto cancel; | |
1260 | } | |
b6f0fe04 RS |
1261 | else if (PT == XFASTINT (w->last_point) |
1262 | /* Make sure the cursor was last displayed | |
1263 | in this window. Otherwise we have to reposition it. */ | |
1264 | && XINT (w->top) <= FRAME_CURSOR_Y (selected_frame) | |
1265 | && (XINT (w->top) + XINT (w->height) | |
1266 | > FRAME_CURSOR_Y (selected_frame))) | |
a2889657 JB |
1267 | { |
1268 | if (!must_finish) | |
1269 | { | |
1270 | do_pending_window_change (); | |
1271 | return; | |
1272 | } | |
1273 | goto update; | |
1274 | } | |
8b51f1e3 KH |
1275 | /* If highlighting the region, or if the cursor is in the echo area, |
1276 | then we can't just move the cursor. */ | |
bd66d1ba RS |
1277 | else if (! (!NILP (Vtransient_mark_mode) |
1278 | && !NILP (current_buffer->mark_active)) | |
293a54ce RS |
1279 | && (w == XWINDOW (current_buffer->last_selected_window) |
1280 | || highlight_nonselected_windows) | |
8b51f1e3 KH |
1281 | && NILP (w->region_showing) |
1282 | && !cursor_in_echo_area) | |
a2889657 JB |
1283 | { |
1284 | pos = *compute_motion (tlbufpos, 0, | |
1285 | XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0, | |
ca26e1c8 | 1286 | 0, |
68be917d | 1287 | PT, 2, - (1 << (BITS_PER_SHORT - 1)), |
b1d1124b | 1288 | window_internal_width (w) - 1, |
de3e8b15 | 1289 | XINT (w->hscroll), |
12adba34 RS |
1290 | pos_tab_offset (w, tlbufpos, tlbufpos_byte), |
1291 | w); | |
a2889657 JB |
1292 | if (pos.vpos < 1) |
1293 | { | |
210e752f | 1294 | int width = window_internal_width (w) - 1; |
44fa5b1e | 1295 | FRAME_CURSOR_X (selected_frame) |
73f194f1 | 1296 | = WINDOW_LEFT_MARGIN (w) + minmax (0, pos.hpos, width); |
44fa5b1e | 1297 | FRAME_CURSOR_Y (selected_frame) = this_line_vpos; |
a2889657 JB |
1298 | goto update; |
1299 | } | |
1300 | else | |
1301 | goto cancel; | |
1302 | } | |
1303 | cancel: | |
1304 | /* Text changed drastically or point moved off of line */ | |
44fa5b1e | 1305 | cancel_line (this_line_vpos, selected_frame); |
a2889657 JB |
1306 | } |
1307 | ||
1308 | this_line_bufpos = 0; | |
1309 | all_windows |= buffer_shared > 1; | |
1310 | ||
463f6b91 RS |
1311 | clear_face_cache_count++; |
1312 | ||
a2889657 JB |
1313 | if (all_windows) |
1314 | { | |
35f56f96 | 1315 | Lisp_Object tail, frame; |
a2889657 | 1316 | |
87485d6f | 1317 | #ifdef HAVE_FACES |
463f6b91 RS |
1318 | /* Clear the face cache, only when we do a full redisplay |
1319 | and not too often either. */ | |
1320 | if (clear_face_cache_count > 1000) | |
1321 | { | |
1322 | clear_face_cache (); | |
1323 | clear_face_cache_count = 0; | |
1324 | } | |
31b24551 JB |
1325 | #endif |
1326 | ||
a2889657 | 1327 | /* Recompute # windows showing selected buffer. |
8de2d90b | 1328 | This will be incremented each time such a window is displayed. */ |
a2889657 JB |
1329 | buffer_shared = 0; |
1330 | ||
35f56f96 | 1331 | FOR_EACH_FRAME (tail, frame) |
30c566e4 | 1332 | { |
35f56f96 | 1333 | FRAME_PTR f = XFRAME (frame); |
fd8ff63d | 1334 | if (FRAME_WINDOW_P (f) || f == selected_frame) |
9769686d | 1335 | { |
35f56f96 | 1336 | |
9769686d RS |
1337 | /* Mark all the scroll bars to be removed; we'll redeem the ones |
1338 | we want when we redisplay their windows. */ | |
1339 | if (condemn_scroll_bars_hook) | |
1340 | (*condemn_scroll_bars_hook) (f); | |
30c566e4 | 1341 | |
f21ef775 | 1342 | if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
89819bdd | 1343 | redisplay_windows (FRAME_ROOT_WINDOW (f), preserve_echo_area); |
30c566e4 | 1344 | |
9769686d RS |
1345 | /* Any scroll bars which redisplay_windows should have nuked |
1346 | should now go away. */ | |
1347 | if (judge_scroll_bars_hook) | |
1348 | (*judge_scroll_bars_hook) (f); | |
1349 | } | |
30c566e4 | 1350 | } |
a2889657 | 1351 | } |
f21ef775 | 1352 | else if (FRAME_VISIBLE_P (selected_frame) && !FRAME_OBSCURED_P (selected_frame)) |
a2889657 | 1353 | { |
e9874cee | 1354 | redisplay_window (selected_window, 1, preserve_echo_area); |
73f194f1 | 1355 | if (!WINDOW_FULL_WIDTH_P (w)) |
a2889657 JB |
1356 | preserve_other_columns (w); |
1357 | } | |
1358 | ||
1359 | update: | |
1360 | /* Prevent various kinds of signals during display update. | |
1361 | stdio is not robust about handling signals, | |
1362 | which can cause an apparent I/O error. */ | |
1363 | if (interrupt_input) | |
1364 | unrequest_sigio (); | |
1365 | stop_polling (); | |
1366 | ||
a2889657 JB |
1367 | if (all_windows) |
1368 | { | |
1369 | Lisp_Object tail; | |
1370 | ||
1371 | pause = 0; | |
1372 | ||
44fa5b1e | 1373 | for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr) |
a2889657 | 1374 | { |
44fa5b1e | 1375 | FRAME_PTR f; |
a2889657 | 1376 | |
e24c997d | 1377 | if (!FRAMEP (XCONS (tail)->car)) |
a2889657 JB |
1378 | continue; |
1379 | ||
44fa5b1e | 1380 | f = XFRAME (XCONS (tail)->car); |
1af9f229 | 1381 | |
fd8ff63d | 1382 | if ((FRAME_WINDOW_P (f) || f == selected_frame) |
f21ef775 | 1383 | && FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
a2889657 | 1384 | { |
44fa5b1e | 1385 | pause |= update_frame (f, 0, 0); |
a2889657 | 1386 | if (!pause) |
efc63ef0 RS |
1387 | { |
1388 | mark_window_display_accurate (f->root_window, 1); | |
1389 | if (frame_up_to_date_hook != 0) | |
1390 | (*frame_up_to_date_hook) (f); | |
1391 | } | |
a2889657 JB |
1392 | } |
1393 | } | |
1394 | } | |
1395 | else | |
6e8290aa | 1396 | { |
f21ef775 | 1397 | if (FRAME_VISIBLE_P (selected_frame) && !FRAME_OBSCURED_P (selected_frame)) |
44fa5b1e | 1398 | pause = update_frame (selected_frame, 0, 0); |
4d641a15 KH |
1399 | else |
1400 | pause = 0; | |
d724d989 | 1401 | |
8de2d90b | 1402 | /* We may have called echo_area_display at the top of this |
44fa5b1e JB |
1403 | function. If the echo area is on another frame, that may |
1404 | have put text on a frame other than the selected one, so the | |
1405 | above call to update_frame would not have caught it. Catch | |
8de2d90b JB |
1406 | it here. */ |
1407 | { | |
84faf44c RS |
1408 | Lisp_Object mini_window; |
1409 | FRAME_PTR mini_frame; | |
1410 | ||
1411 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
1412 | mini_frame = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
8de2d90b | 1413 | |
fd8ff63d | 1414 | if (mini_frame != selected_frame && FRAME_WINDOW_P (mini_frame)) |
44fa5b1e | 1415 | pause |= update_frame (mini_frame, 0, 0); |
8de2d90b | 1416 | } |
6e8290aa | 1417 | } |
a2889657 | 1418 | |
44fa5b1e | 1419 | /* If frame does not match, prevent doing single-line-update next time. |
a2889657 JB |
1420 | Also, don't forget to check every line to update the arrow. */ |
1421 | if (pause) | |
1422 | { | |
1423 | this_line_bufpos = 0; | |
265a9e55 | 1424 | if (!NILP (last_arrow_position)) |
a2889657 JB |
1425 | { |
1426 | last_arrow_position = Qt; | |
1427 | last_arrow_string = Qt; | |
1428 | } | |
44fa5b1e | 1429 | /* If we pause after scrolling, some lines in current_frame |
a2889657 JB |
1430 | may be null, so preserve_other_columns won't be able to |
1431 | preserve all the vertical-bar separators. So, avoid using it | |
1432 | in that case. */ | |
73f194f1 | 1433 | if (!WINDOW_FULL_WIDTH_P (w)) |
a2889657 JB |
1434 | update_mode_lines = 1; |
1435 | } | |
1436 | ||
44fa5b1e | 1437 | /* Now text on frame agrees with windows, so |
a2889657 JB |
1438 | put info into the windows for partial redisplay to follow */ |
1439 | ||
1440 | if (!pause) | |
1441 | { | |
1442 | register struct buffer *b = XBUFFER (w->buffer); | |
1443 | ||
1444 | blank_end_of_window = 0; | |
a2889657 | 1445 | unchanged_modified = BUF_MODIFF (b); |
8850a573 | 1446 | overlay_unchanged_modified = BUF_OVERLAY_MODIFF (b); |
a2889657 JB |
1447 | beg_unchanged = BUF_GPT (b) - BUF_BEG (b); |
1448 | end_unchanged = BUF_Z (b) - BUF_GPT (b); | |
1449 | ||
5936754e RS |
1450 | /* Record the last place cursor was displayed in this window. |
1451 | But not if cursor is in the echo area, because in that case | |
1452 | FRAME_CURSOR_X and FRAME_CURSOR_Y are in the echo area. */ | |
1453 | if (!(cursor_in_echo_area && FRAME_HAS_MINIBUF_P (selected_frame) | |
1454 | && EQ (FRAME_MINIBUF_WINDOW (selected_frame), minibuf_window))) | |
1455 | { | |
1456 | XSETFASTINT (w->last_point, BUF_PT (b)); | |
1457 | XSETFASTINT (w->last_point_x, FRAME_CURSOR_X (selected_frame)); | |
1458 | XSETFASTINT (w->last_point_y, FRAME_CURSOR_Y (selected_frame)); | |
1459 | } | |
1460 | else | |
1461 | /* Make last_point invalid, since we don't really know | |
1462 | where the cursor would be if it were not in the echo area. */ | |
1463 | XSETINT (w->last_point, -1); | |
a2889657 JB |
1464 | |
1465 | if (all_windows) | |
11e82b76 | 1466 | mark_window_display_accurate (FRAME_ROOT_WINDOW (selected_frame), 1); |
a2889657 JB |
1467 | else |
1468 | { | |
28995e67 | 1469 | b->clip_changed = 0; |
a2889657 | 1470 | w->update_mode_line = Qnil; |
c2213350 | 1471 | XSETFASTINT (w->last_modified, BUF_MODIFF (b)); |
8850a573 | 1472 | XSETFASTINT (w->last_overlay_modified, BUF_OVERLAY_MODIFF (b)); |
538f13d4 RS |
1473 | w->last_had_star |
1474 | = (BUF_MODIFF (XBUFFER (w->buffer)) > BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
1475 | ? Qt : Qnil); | |
3ee4159a RS |
1476 | |
1477 | /* Record if we are showing a region, so can make sure to | |
1478 | update it fully at next redisplay. */ | |
1479 | w->region_showing = (!NILP (Vtransient_mark_mode) | |
293a54ce RS |
1480 | && (w == XWINDOW (current_buffer->last_selected_window) |
1481 | || highlight_nonselected_windows) | |
3ee4159a RS |
1482 | && !NILP (XBUFFER (w->buffer)->mark_active) |
1483 | ? Fmarker_position (XBUFFER (w->buffer)->mark) | |
1484 | : Qnil); | |
1485 | ||
d2f84654 | 1486 | w->window_end_valid = w->buffer; |
d45de95b | 1487 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 | 1488 | last_arrow_string = Voverlay_arrow_string; |
0d231165 RS |
1489 | if (do_verify_charstarts) |
1490 | verify_charstarts (w); | |
efc63ef0 RS |
1491 | if (frame_up_to_date_hook != 0) |
1492 | (*frame_up_to_date_hook) (selected_frame); | |
a2889657 JB |
1493 | } |
1494 | update_mode_lines = 0; | |
1495 | windows_or_buffers_changed = 0; | |
1496 | } | |
1497 | ||
1498 | /* Start SIGIO interrupts coming again. | |
1499 | Having them off during the code above | |
1500 | makes it less likely one will discard output, | |
1501 | but not impossible, since there might be stuff | |
1502 | in the system buffer here. | |
1503 | But it is much hairier to try to do anything about that. */ | |
1504 | ||
1505 | if (interrupt_input) | |
1506 | request_sigio (); | |
1507 | start_polling (); | |
1508 | ||
11c52c4f RS |
1509 | /* If something has become visible now which was not before, |
1510 | redisplay again, so that we get them. */ | |
1511 | if (!pause) | |
1512 | { | |
1513 | Lisp_Object tail, frame; | |
1514 | int new_count = 0; | |
1515 | ||
1516 | FOR_EACH_FRAME (tail, frame) | |
1517 | { | |
1518 | int this_is_visible = 0; | |
8e83f802 RS |
1519 | |
1520 | if (XFRAME (frame)->visible) | |
1521 | this_is_visible = 1; | |
1522 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
1523 | if (XFRAME (frame)->visible) | |
1524 | this_is_visible = 1; | |
11c52c4f RS |
1525 | |
1526 | if (this_is_visible) | |
1527 | new_count++; | |
1528 | } | |
1529 | ||
89819bdd | 1530 | if (new_count != number_of_visible_frames) |
11c52c4f RS |
1531 | windows_or_buffers_changed++; |
1532 | } | |
1533 | ||
44fa5b1e | 1534 | /* Change frame size now if a change is pending. */ |
a2889657 | 1535 | do_pending_window_change (); |
d8e242fd | 1536 | |
8b32d885 RS |
1537 | /* If we just did a pending size change, or have additional |
1538 | visible frames, redisplay again. */ | |
3c8c72e0 | 1539 | if (windows_or_buffers_changed && !pause) |
8b32d885 | 1540 | goto retry; |
a2889657 JB |
1541 | } |
1542 | ||
1543 | /* Redisplay, but leave alone any recent echo area message | |
1544 | unless another message has been requested in its place. | |
1545 | ||
1546 | This is useful in situations where you need to redisplay but no | |
1547 | user action has occurred, making it inappropriate for the message | |
1548 | area to be cleared. See tracking_off and | |
1549 | wait_reading_process_input for examples of these situations. */ | |
1550 | ||
8991bb31 | 1551 | void |
a2889657 JB |
1552 | redisplay_preserve_echo_area () |
1553 | { | |
1554 | if (echo_area_glyphs == 0 && previous_echo_glyphs != 0) | |
1555 | { | |
1556 | echo_area_glyphs = previous_echo_glyphs; | |
e9874cee | 1557 | redisplay_internal (1); |
a2889657 JB |
1558 | echo_area_glyphs = 0; |
1559 | } | |
1560 | else | |
e9874cee | 1561 | redisplay_internal (1); |
a2889657 JB |
1562 | } |
1563 | ||
1564 | void | |
1565 | mark_window_display_accurate (window, flag) | |
1566 | Lisp_Object window; | |
1567 | int flag; | |
1568 | { | |
1569 | register struct window *w; | |
1570 | ||
265a9e55 | 1571 | for (;!NILP (window); window = w->next) |
a2889657 | 1572 | { |
e24c997d | 1573 | if (!WINDOWP (window)) abort (); |
a2889657 JB |
1574 | w = XWINDOW (window); |
1575 | ||
265a9e55 | 1576 | if (!NILP (w->buffer)) |
bd66d1ba | 1577 | { |
c2213350 KH |
1578 | XSETFASTINT (w->last_modified, |
1579 | !flag ? 0 : BUF_MODIFF (XBUFFER (w->buffer))); | |
8850a573 RS |
1580 | XSETFASTINT (w->last_overlay_modified, |
1581 | !flag ? 0 : BUF_OVERLAY_MODIFF (XBUFFER (w->buffer))); | |
538f13d4 RS |
1582 | w->last_had_star |
1583 | = (BUF_MODIFF (XBUFFER (w->buffer)) > BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
1584 | ? Qt : Qnil); | |
bd66d1ba RS |
1585 | |
1586 | /* Record if we are showing a region, so can make sure to | |
1587 | update it fully at next redisplay. */ | |
1588 | w->region_showing = (!NILP (Vtransient_mark_mode) | |
293a54ce RS |
1589 | && (w == XWINDOW (current_buffer->last_selected_window) |
1590 | || highlight_nonselected_windows) | |
bd66d1ba RS |
1591 | && !NILP (XBUFFER (w->buffer)->mark_active) |
1592 | ? Fmarker_position (XBUFFER (w->buffer)->mark) | |
1593 | : Qnil); | |
1594 | } | |
1595 | ||
d2f84654 | 1596 | w->window_end_valid = w->buffer; |
a2889657 | 1597 | w->update_mode_line = Qnil; |
051e7076 | 1598 | if (!NILP (w->buffer) && flag) |
28995e67 | 1599 | XBUFFER (w->buffer)->clip_changed = 0; |
a2889657 | 1600 | |
265a9e55 | 1601 | if (!NILP (w->vchild)) |
a2889657 | 1602 | mark_window_display_accurate (w->vchild, flag); |
265a9e55 | 1603 | if (!NILP (w->hchild)) |
a2889657 JB |
1604 | mark_window_display_accurate (w->hchild, flag); |
1605 | } | |
1606 | ||
1607 | if (flag) | |
1608 | { | |
d45de95b | 1609 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 JB |
1610 | last_arrow_string = Voverlay_arrow_string; |
1611 | } | |
1612 | else | |
1613 | { | |
1614 | /* t is unequal to any useful value of Voverlay_arrow_... */ | |
1615 | last_arrow_position = Qt; | |
1616 | last_arrow_string = Qt; | |
1617 | } | |
1618 | } | |
1619 | \f | |
ecf7de9b | 1620 | /* Update the menu bar item list for frame F. |
90adcf20 | 1621 | This has to be done before we start to fill in any display lines, |
a2725ab2 RS |
1622 | because it can call eval. |
1623 | ||
1624 | If SAVE_MATCH_DATA is 1, we must save and restore it here. */ | |
90adcf20 RS |
1625 | |
1626 | static void | |
a2725ab2 | 1627 | update_menu_bar (f, save_match_data) |
ecf7de9b | 1628 | FRAME_PTR f; |
a2725ab2 | 1629 | int save_match_data; |
90adcf20 | 1630 | { |
90adcf20 | 1631 | struct buffer *old = current_buffer; |
ecf7de9b RS |
1632 | Lisp_Object window; |
1633 | register struct window *w; | |
a2725ab2 | 1634 | |
ecf7de9b RS |
1635 | window = FRAME_SELECTED_WINDOW (f); |
1636 | w = XWINDOW (window); | |
90adcf20 RS |
1637 | |
1638 | if (update_mode_lines) | |
1639 | w->update_mode_line = Qt; | |
1640 | ||
d1e74921 | 1641 | if (FRAME_WINDOW_P (f) |
d3413a53 | 1642 | ? |
dc937613 | 1643 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) |
cf074754 | 1644 | FRAME_EXTERNAL_MENU_BAR (f) |
78614721 | 1645 | #else |
cf074754 | 1646 | FRAME_MENU_BAR_LINES (f) > 0 |
78614721 | 1647 | #endif |
d3413a53 | 1648 | : FRAME_MENU_BAR_LINES (f) > 0) |
90adcf20 RS |
1649 | { |
1650 | /* If the user has switched buffers or windows, we need to | |
1651 | recompute to reflect the new bindings. But we'll | |
1652 | recompute when update_mode_lines is set too; that means | |
1653 | that people can use force-mode-line-update to request | |
1654 | that the menu bar be recomputed. The adverse effect on | |
1655 | the rest of the redisplay algorithm is about the same as | |
1656 | windows_or_buffers_changed anyway. */ | |
1657 | if (windows_or_buffers_changed | |
cf074754 | 1658 | || !NILP (w->update_mode_line) |
538f13d4 RS |
1659 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) |
1660 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
1661 | != !NILP (w->last_had_star)) | |
94bb7f9b KH |
1662 | || ((!NILP (Vtransient_mark_mode) |
1663 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
1664 | != !NILP (w->region_showing))) | |
90adcf20 RS |
1665 | { |
1666 | struct buffer *prev = current_buffer; | |
a2725ab2 RS |
1667 | int count = specpdl_ptr - specpdl; |
1668 | ||
399164b4 | 1669 | set_buffer_internal_1 (XBUFFER (w->buffer)); |
eac4251c | 1670 | if (save_match_data) |
84dd0ae5 | 1671 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); |
399164b4 | 1672 | if (NILP (Voverriding_local_map_menu_flag)) |
d46fb96a KH |
1673 | { |
1674 | specbind (Qoverriding_terminal_local_map, Qnil); | |
1675 | specbind (Qoverriding_local_map, Qnil); | |
1676 | } | |
a2725ab2 | 1677 | |
34acc8e6 KH |
1678 | /* Run the Lucid hook. */ |
1679 | call1 (Vrun_hooks, Qactivate_menubar_hook); | |
1680 | /* If it has changed current-menubar from previous value, | |
1681 | really recompute the menubar from the value. */ | |
1682 | if (! NILP (Vlucid_menu_bar_dirty_flag)) | |
1683 | call0 (Qrecompute_lucid_menubar); | |
e02500d4 | 1684 | safe_run_hooks (Qmenu_bar_update_hook); |
8351baf2 | 1685 | FRAME_MENU_BAR_ITEMS (f) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f)); |
538f13d4 | 1686 | /* Redisplay the menu bar in case we changed it. */ |
8f3343d0 | 1687 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) |
d1e74921 | 1688 | if (FRAME_WINDOW_P (f)) |
d3413a53 | 1689 | set_frame_menubar (f, 0, 0); |
538f13d4 RS |
1690 | else |
1691 | /* On a terminal screen, the menu bar is an ordinary screen | |
1692 | line, and this makes it get updated. */ | |
1693 | w->update_mode_line = Qt; | |
1694 | #else /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
1695 | /* In the non-toolkit version, the menu bar is an ordinary screen | |
1696 | line, and this makes it get updated. */ | |
1697 | w->update_mode_line = Qt; | |
1698 | #endif /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
a2725ab2 RS |
1699 | |
1700 | unbind_to (count, Qnil); | |
399164b4 | 1701 | set_buffer_internal_1 (prev); |
90adcf20 RS |
1702 | } |
1703 | } | |
1704 | } | |
1705 | \f | |
a2889657 JB |
1706 | int do_id = 1; |
1707 | ||
90adcf20 RS |
1708 | /* Redisplay WINDOW and its subwindows and siblings. */ |
1709 | ||
a2889657 | 1710 | static void |
e9874cee | 1711 | redisplay_windows (window, preserve_echo_area) |
a2889657 | 1712 | Lisp_Object window; |
e9874cee | 1713 | int preserve_echo_area; |
a2889657 | 1714 | { |
265a9e55 | 1715 | for (; !NILP (window); window = XWINDOW (window)->next) |
e9874cee | 1716 | redisplay_window (window, 0, preserve_echo_area); |
a2889657 JB |
1717 | } |
1718 | ||
1f1ff51d KH |
1719 | /* Return value in display table DP (Lisp_Char_Table *) for character |
1720 | C. Since a display table doesn't have any parent, we don't have to | |
1721 | follow parent. Do not call this function directly but use the | |
1722 | macro DISP_CHAR_VECTOR. */ | |
1723 | Lisp_Object | |
1724 | disp_char_vector (dp, c) | |
1725 | struct Lisp_Char_Table *dp; | |
1726 | int c; | |
1727 | { | |
1728 | int code[4], i; | |
1729 | Lisp_Object val; | |
1730 | ||
1731 | if (SINGLE_BYTE_CHAR_P (c)) return (dp->contents[c]); | |
1732 | ||
1733 | SPLIT_NON_ASCII_CHAR (c, code[0], code[1], code[2]); | |
1734 | if (code[0] != CHARSET_COMPOSITION) | |
1735 | { | |
1736 | if (code[1] < 32) code[1] = -1; | |
1737 | else if (code[2] < 32) code[2] = -1; | |
1738 | } | |
1739 | /* Here, the possible range of CODE[0] (== charset ID) is | |
1740 | 128..MAX_CHARSET. Since the top level char table contains data | |
1741 | for multibyte characters after 256th element, we must increment | |
1742 | CODE[0] by 128 to get a correct index. */ | |
1743 | code[0] += 128; | |
1744 | code[3] = -1; /* anchor */ | |
1745 | ||
1746 | for (i = 0; code[i] >= 0; i++, dp = XCHAR_TABLE (val)) | |
1747 | { | |
1748 | val = dp->contents[code[i]]; | |
1749 | if (!SUB_CHAR_TABLE_P (val)) | |
1750 | return (NILP (val) ? dp->defalt : val); | |
1751 | } | |
1752 | /* Here, VAL is a sub char table. We return the default value of it. */ | |
1753 | return (dp->defalt); | |
1754 | } | |
1755 | ||
90adcf20 RS |
1756 | /* Redisplay window WINDOW and its subwindows. */ |
1757 | ||
a2889657 | 1758 | static void |
e9874cee | 1759 | redisplay_window (window, just_this_one, preserve_echo_area) |
a2889657 | 1760 | Lisp_Object window; |
e9874cee | 1761 | int just_this_one, preserve_echo_area; |
a2889657 JB |
1762 | { |
1763 | register struct window *w = XWINDOW (window); | |
30c566e4 | 1764 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
a2889657 | 1765 | int height; |
12adba34 RS |
1766 | int lpoint = PT; |
1767 | int lpoint_byte = PT_BYTE; | |
a2889657 | 1768 | struct buffer *old = current_buffer; |
b1d1124b | 1769 | register int width = window_internal_width (w) - 1; |
12adba34 | 1770 | register int startp, startp_byte; |
a2889657 JB |
1771 | register int hscroll = XINT (w->hscroll); |
1772 | struct position pos; | |
ae3b1442 | 1773 | int opoint = PT; |
12adba34 | 1774 | int opoint_byte = PT_BYTE; |
a2889657 | 1775 | int tem; |
e481f960 | 1776 | int update_mode_line; |
f908610f | 1777 | struct Lisp_Char_Table *dp = window_display_table (w); |
5ba50c51 | 1778 | int really_switched_buffer = 0; |
2e54982e | 1779 | int count = specpdl_ptr - specpdl; |
a2889657 | 1780 | |
12adba34 RS |
1781 | if (Z == Z_BYTE && lpoint != lpoint_byte) |
1782 | abort (); | |
1783 | if (lpoint_byte < lpoint) | |
1784 | abort (); | |
1785 | ||
44fa5b1e | 1786 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
a2889657 JB |
1787 | |
1788 | /* If this is a combination window, do its children; that's all. */ | |
1789 | ||
265a9e55 | 1790 | if (!NILP (w->vchild)) |
a2889657 | 1791 | { |
f9c467a3 | 1792 | redisplay_windows (w->vchild, preserve_echo_area); |
a2889657 JB |
1793 | return; |
1794 | } | |
265a9e55 | 1795 | if (!NILP (w->hchild)) |
a2889657 | 1796 | { |
f9c467a3 | 1797 | redisplay_windows (w->hchild, preserve_echo_area); |
a2889657 JB |
1798 | return; |
1799 | } | |
265a9e55 | 1800 | if (NILP (w->buffer)) |
a2889657 | 1801 | abort (); |
2e54982e RS |
1802 | |
1803 | specbind (Qinhibit_point_motion_hooks, Qt); | |
1804 | ||
8de2d90b | 1805 | height = window_internal_height (w); |
4d641a15 | 1806 | update_mode_line = (!NILP (w->update_mode_line) || update_mode_lines); |
73af359d RS |
1807 | if (XBUFFER (w->buffer)->clip_changed) |
1808 | update_mode_line = 1; | |
8de2d90b JB |
1809 | |
1810 | if (MINI_WINDOW_P (w)) | |
1811 | { | |
73af359d RS |
1812 | if (w == XWINDOW (echo_area_window) && echo_area_glyphs) |
1813 | /* We've already displayed the echo area glyphs in this window. */ | |
1814 | goto finish_scroll_bars; | |
1815 | else if (w != XWINDOW (minibuf_window)) | |
8de2d90b | 1816 | { |
73af359d RS |
1817 | /* This is a minibuffer, but it's not the currently active one, |
1818 | so clear it. */ | |
1819 | int vpos = XFASTINT (w->top); | |
8de2d90b JB |
1820 | int i; |
1821 | ||
1822 | for (i = 0; i < height; i++) | |
1823 | { | |
44fa5b1e | 1824 | get_display_line (f, vpos + i, 0); |
73f194f1 RS |
1825 | display_string (w, vpos + i, "", 0, |
1826 | FRAME_LEFT_SCROLL_BAR_WIDTH (f), | |
a3788d53 | 1827 | 0, 1, 0, width, 0); |
8de2d90b JB |
1828 | } |
1829 | ||
88f22aff | 1830 | goto finish_scroll_bars; |
8de2d90b JB |
1831 | } |
1832 | } | |
a2889657 | 1833 | |
a2889657 JB |
1834 | /* Otherwise set up data on this window; select its buffer and point value */ |
1835 | ||
e481f960 | 1836 | if (update_mode_line) |
5ba50c51 RS |
1837 | /* Really select the buffer, for the sake of buffer-local variables. */ |
1838 | { | |
1839 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
1840 | really_switched_buffer = 1; | |
1841 | } | |
e481f960 RS |
1842 | else |
1843 | set_buffer_temp (XBUFFER (w->buffer)); | |
1844 | ||
ae3b1442 | 1845 | opoint = PT; |
12adba34 RS |
1846 | opoint_byte = PT_BYTE; |
1847 | ||
1848 | if (Z == Z_BYTE && opoint != opoint_byte) | |
1849 | abort (); | |
1850 | if (opoint_byte < opoint) | |
1851 | abort (); | |
a2889657 | 1852 | |
28995e67 RS |
1853 | /* If %c is in mode line, update it if needed. */ |
1854 | if (!NILP (w->column_number_displayed) | |
1855 | /* This alternative quickly identifies a common case | |
1856 | where no change is needed. */ | |
1857 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
1858 | && XFASTINT (w->last_modified) >= MODIFF |
1859 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
1860 | && XFASTINT (w->column_number_displayed) != current_column ()) |
1861 | update_mode_line = 1; | |
1862 | ||
42640f83 RS |
1863 | /* Count number of windows showing the selected buffer. |
1864 | An indirect buffer counts as its base buffer. */ | |
a2889657 | 1865 | |
42640f83 RS |
1866 | if (!just_this_one) |
1867 | { | |
1868 | struct buffer *current_base, *window_base; | |
1869 | current_base = current_buffer; | |
1870 | window_base = XBUFFER (XWINDOW (selected_window)->buffer); | |
1871 | if (current_base->base_buffer) | |
1872 | current_base = current_base->base_buffer; | |
1873 | if (window_base->base_buffer) | |
1874 | window_base = window_base->base_buffer; | |
1875 | if (current_base == window_base) | |
1876 | buffer_shared++; | |
1877 | } | |
a2889657 JB |
1878 | |
1879 | /* POINT refers normally to the selected window. | |
1880 | For any other window, set up appropriate value. */ | |
1881 | ||
1882 | if (!EQ (window, selected_window)) | |
1883 | { | |
12adba34 RS |
1884 | int new_pt = XMARKER (w->pointm)->charpos; |
1885 | int new_pt_byte = marker_byte_position (w->pointm); | |
f67a0f51 | 1886 | if (new_pt < BEGV) |
a2889657 | 1887 | { |
f67a0f51 | 1888 | new_pt = BEGV; |
12adba34 RS |
1889 | new_pt_byte = BEGV_BYTE; |
1890 | set_marker_both (w->pointm, Qnil, BEGV, BEGV_BYTE); | |
a2889657 | 1891 | } |
f67a0f51 | 1892 | else if (new_pt > (ZV - 1)) |
a2889657 | 1893 | { |
f67a0f51 | 1894 | new_pt = ZV; |
12adba34 RS |
1895 | new_pt_byte = ZV_BYTE; |
1896 | set_marker_both (w->pointm, Qnil, ZV, ZV_BYTE); | |
a2889657 | 1897 | } |
f67a0f51 | 1898 | /* We don't use SET_PT so that the point-motion hooks don't run. */ |
12adba34 | 1899 | TEMP_SET_PT_BOTH (new_pt, new_pt_byte); |
a2889657 JB |
1900 | } |
1901 | ||
f4faa47c JB |
1902 | /* If any of the character widths specified in the display table |
1903 | have changed, invalidate the width run cache. It's true that this | |
1904 | may be a bit late to catch such changes, but the rest of | |
1905 | redisplay goes (non-fatally) haywire when the display table is | |
1906 | changed, so why should we worry about doing any better? */ | |
1907 | if (current_buffer->width_run_cache) | |
1908 | { | |
f908610f | 1909 | struct Lisp_Char_Table *disptab = buffer_display_table (); |
f4faa47c JB |
1910 | |
1911 | if (! disptab_matches_widthtab (disptab, | |
1912 | XVECTOR (current_buffer->width_table))) | |
1913 | { | |
1914 | invalidate_region_cache (current_buffer, | |
1915 | current_buffer->width_run_cache, | |
1916 | BEG, Z); | |
1917 | recompute_width_table (current_buffer, disptab); | |
1918 | } | |
1919 | } | |
1920 | ||
a2889657 | 1921 | /* If window-start is screwed up, choose a new one. */ |
a2889657 JB |
1922 | if (XMARKER (w->start)->buffer != current_buffer) |
1923 | goto recenter; | |
1924 | ||
1925 | startp = marker_position (w->start); | |
12adba34 | 1926 | startp_byte = marker_byte_position (w->start); |
a2889657 | 1927 | |
cf0df6ab RS |
1928 | /* If someone specified a new starting point but did not insist, |
1929 | check whether it can be used. */ | |
81d2de9b RS |
1930 | if (!NILP (w->optional_new_start) |
1931 | && startp >= BEGV && startp <= ZV) | |
cf0df6ab RS |
1932 | { |
1933 | w->optional_new_start = Qnil; | |
1934 | /* Check whether this start pos is usable given where point is. */ | |
1935 | ||
1936 | pos = *compute_motion (startp, 0, | |
1937 | (((EQ (window, minibuf_window) | |
1938 | && startp == BEG) | |
1939 | ? minibuf_prompt_width : 0) | |
1940 | + (hscroll ? 1 - hscroll : 0)), | |
1941 | 0, | |
1c9241f5 KH |
1942 | PT, height, |
1943 | /* BUG FIX: See the comment of | |
1944 | Fpos_visible_in_window_p (window.c). */ | |
1945 | - (1 << (BITS_PER_SHORT - 1)), | |
12adba34 RS |
1946 | width, hscroll, |
1947 | pos_tab_offset (w, startp, startp_byte), w); | |
cf0df6ab RS |
1948 | /* If PT does fit on the screen, we will use this start pos, |
1949 | so do so by setting force_start. */ | |
1950 | if (pos.bufpos == PT) | |
1951 | w->force_start = Qt; | |
1952 | } | |
1953 | ||
8de2d90b | 1954 | /* Handle case where place to start displaying has been specified, |
aa6d10fa | 1955 | unless the specified location is outside the accessible range. */ |
265a9e55 | 1956 | if (!NILP (w->force_start)) |
a2889657 | 1957 | { |
e63574d7 | 1958 | w->force_start = Qnil; |
aa6d10fa RS |
1959 | /* Forget any recorded base line for line number display. */ |
1960 | w->base_line_number = Qnil; | |
b5174a51 RS |
1961 | /* The old bottom-of-screen position is no longer valid. */ |
1962 | w->window_end_valid = Qnil; | |
75c43375 RS |
1963 | /* Redisplay the mode line. Select the buffer properly for that. |
1964 | Also, run the hook window-scroll-functions | |
1965 | because we have scrolled. */ | |
e63574d7 RS |
1966 | /* Note, we do this after clearing force_start because |
1967 | if there's an error, it is better to forget about force_start | |
1968 | than to get into an infinite loop calling the hook functions | |
1969 | and having them get more errors. */ | |
75c43375 RS |
1970 | if (!update_mode_line |
1971 | || ! NILP (Vwindow_scroll_functions)) | |
e481f960 | 1972 | { |
75c43375 RS |
1973 | Lisp_Object temp[3]; |
1974 | ||
5ba50c51 RS |
1975 | if (!really_switched_buffer) |
1976 | { | |
1977 | set_buffer_temp (old); | |
1978 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
1979 | } | |
1980 | really_switched_buffer = 1; | |
e481f960 RS |
1981 | update_mode_line = 1; |
1982 | w->update_mode_line = Qt; | |
75c43375 | 1983 | if (! NILP (Vwindow_scroll_functions)) |
3dcd07e3 KH |
1984 | { |
1985 | run_hook_with_args_2 (Qwindow_scroll_functions, window, | |
1986 | make_number (startp)); | |
1987 | startp = marker_position (w->start); | |
84920a5c | 1988 | startp_byte = marker_byte_position (w->start); |
3dcd07e3 | 1989 | } |
e481f960 | 1990 | } |
c2213350 | 1991 | XSETFASTINT (w->last_modified, 0); |
8850a573 | 1992 | XSETFASTINT (w->last_overlay_modified, 0); |
12adba34 RS |
1993 | if (startp < BEGV) startp = BEGV, startp_byte = BEGV_BYTE; |
1994 | if (startp > ZV) startp = ZV, startp = ZV_BYTE; | |
a2889657 JB |
1995 | try_window (window, startp); |
1996 | if (cursor_vpos < 0) | |
1997 | { | |
1998 | /* If point does not appear, move point so it does appear */ | |
1999 | pos = *compute_motion (startp, 0, | |
ca26e1c8 KH |
2000 | (((EQ (window, minibuf_window) |
2001 | && startp == BEG) | |
2002 | ? minibuf_prompt_width : 0) | |
2003 | + (hscroll ? 1 - hscroll : 0)), | |
2004 | 0, | |
2005 | ZV, height / 2, | |
68be917d | 2006 | - (1 << (BITS_PER_SHORT - 1)), |
12adba34 RS |
2007 | width, hscroll, |
2008 | pos_tab_offset (w, startp, startp_byte), | |
2009 | w); | |
2010 | TEMP_SET_PT_BOTH (pos.bufpos, pos.bytepos); | |
90adcf20 | 2011 | if (w != XWINDOW (selected_window)) |
12adba34 | 2012 | set_marker_both (w->pointm, Qnil, PT, PT_BYTE); |
a2889657 JB |
2013 | else |
2014 | { | |
9d6a6bb9 | 2015 | if (current_buffer == old) |
12adba34 RS |
2016 | { |
2017 | lpoint = PT; | |
2018 | lpoint_byte = PT_BYTE; | |
2019 | } | |
73f194f1 | 2020 | FRAME_CURSOR_X (f) = (WINDOW_LEFT_MARGIN (w) |
210e752f | 2021 | + minmax (0, pos.hpos, width)); |
44fa5b1e | 2022 | FRAME_CURSOR_Y (f) = pos.vpos + XFASTINT (w->top); |
a2889657 | 2023 | } |
df0b5ea1 RS |
2024 | /* If we are highlighting the region, |
2025 | then we just changed the region, so redisplay to show it. */ | |
df0b5ea1 RS |
2026 | if (!NILP (Vtransient_mark_mode) |
2027 | && !NILP (current_buffer->mark_active)) | |
6f27fa9b RS |
2028 | { |
2029 | cancel_my_columns (XWINDOW (window)); | |
2030 | try_window (window, startp); | |
2031 | } | |
a2889657 JB |
2032 | } |
2033 | goto done; | |
2034 | } | |
2035 | ||
2036 | /* Handle case where text has not changed, only point, | |
208aee63 | 2037 | and it has not moved off the frame. */ |
a2889657 JB |
2038 | |
2039 | /* This code is not used for minibuffer for the sake of | |
2040 | the case of redisplaying to replace an echo area message; | |
2041 | since in that case the minibuffer contents per se are usually unchanged. | |
2042 | This code is of no real use in the minibuffer since | |
2043 | the handling of this_line_bufpos, etc., | |
2044 | in redisplay handles the same cases. */ | |
2045 | ||
2046 | if (XFASTINT (w->last_modified) >= MODIFF | |
8850a573 | 2047 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF |
86bee31c | 2048 | && PT >= startp && !current_buffer->clip_changed |
73f194f1 | 2049 | && (just_this_one || WINDOW_FULL_WIDTH_P (w)) |
b1aa6cb3 RS |
2050 | /* If force-mode-line-update was called, really redisplay; |
2051 | that's how redisplay is forced after e.g. changing | |
2052 | buffer-invisibility-spec. */ | |
632ab665 | 2053 | && NILP (w->update_mode_line) |
bd66d1ba RS |
2054 | /* Can't use this case if highlighting a region. */ |
2055 | && !(!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active)) | |
2056 | && NILP (w->region_showing) | |
15495c73 KH |
2057 | /* If end pos is out of date, scroll bar and percentage will be wrong */ |
2058 | && INTEGERP (w->window_end_vpos) | |
2059 | && XFASTINT (w->window_end_vpos) < XFASTINT (w->height) | |
d45de95b | 2060 | && !EQ (window, minibuf_window) |
377dbd97 RS |
2061 | && (!MARKERP (Voverlay_arrow_position) |
2062 | || current_buffer != XMARKER (Voverlay_arrow_position)->buffer)) | |
a2889657 | 2063 | { |
377dbd97 RS |
2064 | /* All positions in this clause are relative to the window edge. */ |
2065 | ||
9afd2168 | 2066 | int this_scroll_margin = scroll_margin; |
9c5886e7 | 2067 | int last_point_y = XFASTINT (w->last_point_y) - XINT (w->top); |
377dbd97 | 2068 | int last_point_x = (XFASTINT (w->last_point_x) - WINDOW_LEFT_MARGIN (w)); |
9afd2168 | 2069 | |
4cb46737 | 2070 | /* Find where PT is located now on the frame. */ |
916848d8 RS |
2071 | /* Check just_this_one as a way of verifying that the |
2072 | window edges have not changed. */ | |
e6b50639 RS |
2073 | if (PT == XFASTINT (w->last_point) && just_this_one |
2074 | /* If CURSOR_IN_ECHO_AREA, last_point_x and last_point_y | |
2075 | refer to the echo area and are not related to this window. */ | |
2076 | && ! cursor_in_echo_area) | |
4cb46737 | 2077 | { |
916848d8 RS |
2078 | pos.hpos = last_point_x; |
2079 | pos.vpos = last_point_y; | |
4cb46737 RS |
2080 | pos.bufpos = PT; |
2081 | } | |
9c5886e7 | 2082 | else if (PT > XFASTINT (w->last_point) |
e6b50639 | 2083 | && ! cursor_in_echo_area |
d802580c RS |
2084 | && XFASTINT (w->last_point) > startp && just_this_one |
2085 | /* We can't use this if point is in the left margin of a | |
2086 | hscrolled window, because w->last_point_x has been | |
2087 | clipped to the window edges. */ | |
2088 | && !(last_point_x <= 0 && hscroll)) | |
4cb46737 | 2089 | { |
5ffc0a80 KH |
2090 | int last_point = XFASTINT (w->last_point); |
2091 | int last_point_byte = CHAR_TO_BYTE (last_point); | |
4a4c24d0 RS |
2092 | int tab_offset = (pos_tab_offset (w, last_point, last_point_byte) |
2093 | - (last_point_x + hscroll - !! hscroll)); | |
5ffc0a80 | 2094 | |
919c7723 | 2095 | pos = *compute_motion (last_point, last_point_y, last_point_x, 1, |
4cb46737 | 2096 | PT, height, |
4a4c24d0 | 2097 | /* BUG FIX: See the comment of |
4cb46737 RS |
2098 | Fpos_visible_in_window_p (window.c). */ |
2099 | - (1 << (BITS_PER_SHORT - 1)), | |
2100 | width, hscroll, | |
4a4c24d0 | 2101 | tab_offset, |
12adba34 | 2102 | w); |
4cb46737 RS |
2103 | } |
2104 | else | |
2105 | { | |
2106 | pos = *compute_motion (startp, 0, (hscroll ? 1 - hscroll : 0), 0, | |
2107 | PT, height, | |
2108 | /* BUG FIX: See the comment of | |
2109 | Fpos_visible_in_window_p (window.c). */ | |
2110 | - (1 << (BITS_PER_SHORT - 1)), | |
2111 | width, hscroll, | |
12adba34 RS |
2112 | pos_tab_offset (w, startp, startp_byte), |
2113 | w); | |
4cb46737 | 2114 | } |
a2889657 | 2115 | |
9afd2168 RS |
2116 | /* Don't use a scroll margin that is negative or too large. */ |
2117 | if (this_scroll_margin < 0) | |
2118 | this_scroll_margin = 0; | |
2119 | ||
2120 | if (XINT (w->height) < 4 * scroll_margin) | |
2121 | this_scroll_margin = XINT (w->height) / 4; | |
2122 | ||
2123 | /* If point fits on the screen, and not within the scroll margin, | |
2124 | we are ok. */ | |
2125 | if (pos.vpos < height - this_scroll_margin | |
2126 | && (pos.vpos >= this_scroll_margin || startp == BEGV)) | |
a2889657 | 2127 | { |
44fa5b1e JB |
2128 | /* Ok, point is still on frame */ |
2129 | if (w == XWINDOW (FRAME_SELECTED_WINDOW (f))) | |
a2889657 JB |
2130 | { |
2131 | /* These variables are supposed to be origin 1 */ | |
73f194f1 | 2132 | FRAME_CURSOR_X (f) = (WINDOW_LEFT_MARGIN (w) |
210e752f | 2133 | + minmax (0, pos.hpos, width)); |
44fa5b1e | 2134 | FRAME_CURSOR_Y (f) = pos.vpos + XFASTINT (w->top); |
a2889657 JB |
2135 | } |
2136 | /* This doesn't do the trick, because if a window to the right of | |
2137 | this one must be redisplayed, this does nothing because there | |
44fa5b1e | 2138 | is nothing in DesiredFrame yet, and then the other window is |
a2889657 | 2139 | redisplayed, making likes that are empty in this window's columns. |
73f194f1 | 2140 | if (WINDOW_FULL_WIDTH_P (w)) |
a2889657 JB |
2141 | preserve_my_columns (w); |
2142 | */ | |
abb4c08f KH |
2143 | if (current_buffer->clip_changed |
2144 | && ! NILP (Vwindow_scroll_functions)) | |
2145 | run_hook_with_args_2 (Qwindow_scroll_functions, window, | |
2146 | make_number (marker_position (w->start))); | |
2147 | ||
a2889657 JB |
2148 | goto done; |
2149 | } | |
2150 | /* Don't bother trying redisplay with same start; | |
09cacf9c | 2151 | we already know it will lose. */ |
a2889657 JB |
2152 | } |
2153 | /* If current starting point was originally the beginning of a line | |
2154 | but no longer is, find a new starting point. */ | |
265a9e55 | 2155 | else if (!NILP (w->start_at_line_beg) |
b16234d8 | 2156 | && !(startp <= BEGV |
12adba34 | 2157 | || FETCH_BYTE (startp_byte - 1) == '\n')) |
a2889657 JB |
2158 | { |
2159 | goto recenter; | |
2160 | } | |
2161 | else if (just_this_one && !MINI_WINDOW_P (w) | |
ae3b1442 | 2162 | && PT >= startp |
a2889657 | 2163 | && XFASTINT (w->last_modified) |
14709f21 JB |
2164 | /* or else vmotion on first line won't work. */ |
2165 | && ! NILP (w->start_at_line_beg) | |
a2889657 | 2166 | && ! EQ (w->window_end_valid, Qnil) |
86bee31c | 2167 | && do_id && !current_buffer->clip_changed |
a2889657 | 2168 | && !blank_end_of_window |
73f194f1 | 2169 | && WINDOW_FULL_WIDTH_P (w) |
bd66d1ba RS |
2170 | /* Can't use this case if highlighting a region. */ |
2171 | && !(!NILP (Vtransient_mark_mode) | |
2172 | && !NILP (current_buffer->mark_active)) | |
23c852cb KH |
2173 | /* Don't use try_window_id if newline |
2174 | doesn't display as the end of a line. */ | |
2175 | && !(dp != 0 && VECTORP (DISP_CHAR_VECTOR (dp, '\n'))) | |
bd66d1ba | 2176 | && NILP (w->region_showing) |
d45de95b | 2177 | && EQ (last_arrow_position, COERCE_MARKER (Voverlay_arrow_position)) |
a2889657 | 2178 | && EQ (last_arrow_string, Voverlay_arrow_string) |
44fa5b1e | 2179 | && (tem = try_window_id (FRAME_SELECTED_WINDOW (f))) |
a2889657 JB |
2180 | && tem != -2) |
2181 | { | |
2182 | /* tem > 0 means success. tem == -1 means choose new start. | |
2183 | tem == -2 means try again with same start, | |
2184 | and nothing but whitespace follows the changed stuff. | |
2185 | tem == 0 means try again with same start. */ | |
2186 | if (tem > 0) | |
2187 | goto done; | |
2188 | } | |
2189 | else if (startp >= BEGV && startp <= ZV | |
e9874cee RS |
2190 | && (startp < ZV |
2191 | /* Avoid starting at end of buffer. */ | |
2192 | #if 0 /* This change causes trouble for M-! finger & RET. | |
2193 | It will have to be considered later. */ | |
2194 | || ! EQ (window, selected_window) | |
2195 | /* Don't do the recentering if redisplay | |
2196 | is not for no user action. */ | |
2197 | || preserve_echo_area | |
2198 | #endif | |
2199 | || startp == BEGV | |
8850a573 RS |
2200 | || (XFASTINT (w->last_modified) >= MODIFF |
2201 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF))) | |
a2889657 JB |
2202 | { |
2203 | /* Try to redisplay starting at same place as before */ | |
44fa5b1e | 2204 | /* If point has not moved off frame, accept the results */ |
a2889657 JB |
2205 | try_window (window, startp); |
2206 | if (cursor_vpos >= 0) | |
aa6d10fa | 2207 | { |
28995e67 RS |
2208 | if (!just_this_one || current_buffer->clip_changed |
2209 | || beg_unchanged < startp) | |
aa6d10fa RS |
2210 | /* Forget any recorded base line for line number display. */ |
2211 | w->base_line_number = Qnil; | |
abb4c08f KH |
2212 | |
2213 | if (current_buffer->clip_changed | |
2214 | && ! NILP (Vwindow_scroll_functions)) | |
2215 | run_hook_with_args_2 (Qwindow_scroll_functions, window, | |
2216 | make_number (marker_position (w->start))); | |
2217 | ||
aa6d10fa RS |
2218 | goto done; |
2219 | } | |
a2889657 JB |
2220 | else |
2221 | cancel_my_columns (w); | |
2222 | } | |
2223 | ||
c2213350 | 2224 | XSETFASTINT (w->last_modified, 0); |
8850a573 | 2225 | XSETFASTINT (w->last_overlay_modified, 0); |
e481f960 RS |
2226 | /* Redisplay the mode line. Select the buffer properly for that. */ |
2227 | if (!update_mode_line) | |
2228 | { | |
5ba50c51 RS |
2229 | if (!really_switched_buffer) |
2230 | { | |
2231 | set_buffer_temp (old); | |
2232 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
2233 | } | |
e481f960 RS |
2234 | update_mode_line = 1; |
2235 | w->update_mode_line = Qt; | |
2236 | } | |
a2889657 JB |
2237 | |
2238 | /* Try to scroll by specified few lines */ | |
2239 | ||
09cacf9c RS |
2240 | if ((scroll_conservatively || scroll_step) |
2241 | && !current_buffer->clip_changed | |
0789adb2 RS |
2242 | && startp >= BEGV && startp <= ZV) |
2243 | { | |
f9c8af06 | 2244 | int this_scroll_margin = scroll_margin; |
84920a5c | 2245 | int scroll_margin_pos, scroll_margin_bytepos; |
09cacf9c | 2246 | int scroll_max = scroll_step; |
5936754e RS |
2247 | Lisp_Object ltemp; |
2248 | ||
09cacf9c RS |
2249 | if (scroll_conservatively) |
2250 | scroll_max = scroll_conservatively; | |
f9c8af06 RS |
2251 | |
2252 | /* Don't use a scroll margin that is negative or too large. */ | |
2253 | if (this_scroll_margin < 0) | |
2254 | this_scroll_margin = 0; | |
2255 | ||
44173109 | 2256 | if (XINT (w->height) < 4 * this_scroll_margin) |
f9c8af06 RS |
2257 | this_scroll_margin = XINT (w->height) / 4; |
2258 | ||
5936754e RS |
2259 | ltemp = Fwindow_end (window, Qt); |
2260 | scroll_margin_pos = XINT (ltemp); | |
2261 | ||
44173109 RS |
2262 | if (this_scroll_margin) |
2263 | { | |
2264 | pos = *vmotion (scroll_margin_pos, -this_scroll_margin, w); | |
2265 | scroll_margin_pos = pos.bufpos; | |
84920a5c | 2266 | scroll_margin_bytepos = pos.bytepos; |
44173109 | 2267 | } |
84920a5c AS |
2268 | else |
2269 | scroll_margin_bytepos = CHAR_TO_BYTE (scroll_margin_pos); | |
2270 | ||
44173109 | 2271 | if (PT >= scroll_margin_pos) |
0789adb2 RS |
2272 | { |
2273 | struct position pos; | |
44173109 | 2274 | pos = *compute_motion (scroll_margin_pos, 0, 0, 0, |
0789adb2 RS |
2275 | PT, XFASTINT (w->height), 0, |
2276 | XFASTINT (w->width), XFASTINT (w->hscroll), | |
84920a5c AS |
2277 | pos_tab_offset (w, scroll_margin_pos, |
2278 | scroll_margin_bytepos), | |
12adba34 | 2279 | w); |
09cacf9c | 2280 | if (pos.vpos >= scroll_max) |
0789adb2 RS |
2281 | goto scroll_fail_1; |
2282 | ||
09cacf9c RS |
2283 | pos = *vmotion (startp, |
2284 | scroll_conservatively ? pos.vpos + 1 : scroll_step, | |
2285 | w); | |
0789adb2 | 2286 | |
b5174a51 RS |
2287 | /* The old bottom-of-screen position is no longer valid. */ |
2288 | w->window_end_valid = Qnil; | |
0789adb2 RS |
2289 | if (! NILP (Vwindow_scroll_functions)) |
2290 | { | |
12adba34 | 2291 | set_marker_both (w->start, Qnil, pos.bufpos, pos.bytepos); |
0789adb2 RS |
2292 | run_hook_with_args_2 (Qwindow_scroll_functions, window, |
2293 | make_number (pos.bufpos)); | |
2294 | pos.bufpos = marker_position (w->start); | |
2295 | } | |
2296 | try_window (window, pos.bufpos); | |
2297 | if (cursor_vpos >= 0) | |
2298 | { | |
2299 | if (!just_this_one || current_buffer->clip_changed | |
2300 | || beg_unchanged < startp) | |
2301 | /* Forget any recorded base line for line number display. */ | |
2302 | w->base_line_number = Qnil; | |
2303 | goto done; | |
2304 | } | |
2305 | else | |
2306 | cancel_my_columns (w); | |
2307 | } | |
44173109 RS |
2308 | |
2309 | scroll_margin_pos = startp; | |
2310 | if (this_scroll_margin) | |
2311 | { | |
2312 | pos = *vmotion (scroll_margin_pos, this_scroll_margin, w); | |
2313 | scroll_margin_pos = pos.bufpos; | |
2314 | } | |
2315 | if (PT < scroll_margin_pos) | |
0789adb2 RS |
2316 | { |
2317 | struct position pos; | |
2318 | pos = *compute_motion (PT, 0, 0, 0, | |
44173109 | 2319 | scroll_margin_pos, XFASTINT (w->height), 0, |
0789adb2 | 2320 | XFASTINT (w->width), XFASTINT (w->hscroll), |
84920a5c | 2321 | pos_tab_offset (w, PT, PT_BYTE), |
12adba34 | 2322 | w); |
09cacf9c | 2323 | if (pos.vpos > scroll_max) |
0789adb2 RS |
2324 | goto scroll_fail_1; |
2325 | ||
09cacf9c RS |
2326 | pos = *vmotion (startp, |
2327 | scroll_conservatively ? -pos.vpos : - scroll_step, | |
2328 | w); | |
0789adb2 | 2329 | |
b5174a51 RS |
2330 | /* The old bottom-of-screen position is no longer valid. */ |
2331 | w->window_end_valid = Qnil; | |
0789adb2 RS |
2332 | if (! NILP (Vwindow_scroll_functions)) |
2333 | { | |
12adba34 | 2334 | set_marker_both (w->start, Qnil, pos.bufpos, pos.bytepos); |
0789adb2 RS |
2335 | run_hook_with_args_2 (Qwindow_scroll_functions, window, |
2336 | make_number (pos.bufpos)); | |
2337 | pos.bufpos = marker_position (w->start); | |
2338 | } | |
2339 | try_window (window, pos.bufpos); | |
2340 | if (cursor_vpos >= 0) | |
2341 | { | |
2342 | if (!just_this_one || current_buffer->clip_changed | |
2343 | || beg_unchanged < startp) | |
2344 | /* Forget any recorded base line for line number display. */ | |
2345 | w->base_line_number = Qnil; | |
2346 | goto done; | |
2347 | } | |
2348 | else | |
2349 | cancel_my_columns (w); | |
2350 | } | |
2351 | scroll_fail_1: ; | |
2352 | } | |
2353 | ||
09cacf9c RS |
2354 | #if 0 |
2355 | if (scroll_step && ! scroll_margin && !current_buffer->clip_changed | |
2c081c2d | 2356 | && startp >= BEGV && startp <= ZV) |
a2889657 | 2357 | { |
09cacf9c RS |
2358 | if (margin_call == 0) |
2359 | margin_call = (PT > startp ? 1 : -1); | |
2360 | if (margin_call > 0) | |
a2889657 | 2361 | { |
210e752f | 2362 | pos = *vmotion (Z - XFASTINT (w->window_end_pos), scroll_step, w); |
a2889657 JB |
2363 | if (pos.vpos >= height) |
2364 | goto scroll_fail; | |
2365 | } | |
2366 | ||
09cacf9c RS |
2367 | pos = *vmotion (startp, (margin_call < 0 ? - scroll_step : scroll_step), |
2368 | w); | |
a2889657 | 2369 | |
ae3b1442 | 2370 | if (PT >= pos.bufpos) |
a2889657 | 2371 | { |
b5174a51 RS |
2372 | /* The old bottom-of-screen position is no longer valid. */ |
2373 | w->window_end_valid = Qnil; | |
2374 | ||
75c43375 | 2375 | if (! NILP (Vwindow_scroll_functions)) |
3dcd07e3 | 2376 | { |
12adba34 | 2377 | set_marker_both (w->start, Qnil, pos.bufpos, pos.bytepos); |
3dcd07e3 KH |
2378 | run_hook_with_args_2 (Qwindow_scroll_functions, window, |
2379 | make_number (pos.bufpos)); | |
2380 | pos.bufpos = marker_position (w->start); | |
2381 | } | |
a2889657 JB |
2382 | try_window (window, pos.bufpos); |
2383 | if (cursor_vpos >= 0) | |
aa6d10fa | 2384 | { |
28995e67 RS |
2385 | if (!just_this_one || current_buffer->clip_changed |
2386 | || beg_unchanged < startp) | |
aa6d10fa RS |
2387 | /* Forget any recorded base line for line number display. */ |
2388 | w->base_line_number = Qnil; | |
2389 | goto done; | |
2390 | } | |
a2889657 JB |
2391 | else |
2392 | cancel_my_columns (w); | |
2393 | } | |
2394 | scroll_fail: ; | |
2395 | } | |
09cacf9c | 2396 | #endif |
a2889657 JB |
2397 | |
2398 | /* Finally, just choose place to start which centers point */ | |
2399 | ||
2400 | recenter: | |
aa6d10fa RS |
2401 | /* Forget any previously recorded base line for line number display. */ |
2402 | w->base_line_number = Qnil; | |
2403 | ||
210e752f | 2404 | pos = *vmotion (PT, - (height / 2), w); |
010494d0 KH |
2405 | |
2406 | /* The minibuffer is often just one line. Ordinary scrolling | |
2407 | gives little overlap and looks bad. So show 20 chars before point. */ | |
2408 | if (height == 1 | |
2409 | && (pos.bufpos >= PT - minibuffer_scroll_overlap | |
2410 | /* If we scrolled less than 1/2 line forward, we will | |
2411 | get too much overlap, so change to the usual amount. */ | |
2412 | || pos.bufpos < startp + width / 2) | |
2413 | && PT > BEGV + minibuffer_scroll_overlap | |
2414 | /* If we scrolled to an actual line boundary, | |
2415 | that's different; don't ignore line boundaries. */ | |
f1c87a7d | 2416 | && FETCH_BYTE (pos.bytepos - 1) != '\n') |
835766b6 RS |
2417 | { |
2418 | pos.bufpos = PT - minibuffer_scroll_overlap; | |
2419 | pos.bytepos = CHAR_TO_BYTE (pos.bufpos); | |
2420 | } | |
010494d0 | 2421 | |
e63574d7 RS |
2422 | /* Set startp here explicitly in case that helps avoid an infinite loop |
2423 | in case the window-scroll-functions functions get errors. */ | |
12adba34 | 2424 | set_marker_both (w->start, Qnil, pos.bufpos, pos.bytepos); |
b5174a51 RS |
2425 | |
2426 | /* The old bottom-of-screen position is no longer valid. */ | |
2427 | w->window_end_valid = Qnil; | |
75c43375 | 2428 | if (! NILP (Vwindow_scroll_functions)) |
3dcd07e3 KH |
2429 | { |
2430 | run_hook_with_args_2 (Qwindow_scroll_functions, window, | |
2431 | make_number (pos.bufpos)); | |
2432 | pos.bufpos = marker_position (w->start); | |
835766b6 | 2433 | pos.bytepos = marker_byte_position (w->start); |
3dcd07e3 | 2434 | } |
a2889657 JB |
2435 | try_window (window, pos.bufpos); |
2436 | ||
2437 | startp = marker_position (w->start); | |
12adba34 | 2438 | startp_byte = marker_byte_position (w->start); |
ca26e1c8 | 2439 | w->start_at_line_beg |
12adba34 | 2440 | = (startp == BEGV || FETCH_BYTE (startp_byte - 1) == '\n') ? Qt : Qnil; |
a2889657 JB |
2441 | |
2442 | done: | |
e481f960 | 2443 | if ((update_mode_line |
aa6d10fa RS |
2444 | /* If window not full width, must redo its mode line |
2445 | if the window to its side is being redone */ | |
73f194f1 | 2446 | || (!just_this_one && !WINDOW_FULL_WIDTH_P (w)) |
155ef550 KH |
2447 | || INTEGERP (w->base_line_pos) |
2448 | || (!NILP (w->column_number_displayed) | |
2449 | && XFASTINT (w->column_number_displayed) != current_column ())) | |
a2889657 | 2450 | && height != XFASTINT (w->height)) |
5ba50c51 RS |
2451 | { |
2452 | FRAME_PTR oframe = selected_frame; | |
2453 | if (!really_switched_buffer) | |
2454 | { | |
2455 | set_buffer_temp (old); | |
2456 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
2457 | really_switched_buffer = 1; | |
2458 | } | |
2459 | selected_frame = f; | |
2460 | display_mode_line (w); | |
2461 | selected_frame = oframe; | |
2462 | } | |
aa6d10fa RS |
2463 | if (! line_number_displayed |
2464 | && ! BUFFERP (w->base_line_pos)) | |
2465 | { | |
2466 | w->base_line_pos = Qnil; | |
2467 | w->base_line_number = Qnil; | |
2468 | } | |
a2889657 | 2469 | |
7ce2c095 | 2470 | /* When we reach a frame's selected window, redo the frame's menu bar. */ |
e481f960 | 2471 | if (update_mode_line |
d1e74921 | 2472 | && (FRAME_WINDOW_P (f) |
d3413a53 | 2473 | ? |
dc937613 | 2474 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) |
d3413a53 | 2475 | FRAME_EXTERNAL_MENU_BAR (f) |
76412d64 | 2476 | #else |
d3413a53 | 2477 | FRAME_MENU_BAR_LINES (f) > 0 |
76412d64 | 2478 | #endif |
d3413a53 | 2479 | : FRAME_MENU_BAR_LINES (f) > 0) |
7ce2c095 RS |
2480 | && EQ (FRAME_SELECTED_WINDOW (f), window)) |
2481 | display_menu_bar (w); | |
2482 | ||
88f22aff JB |
2483 | finish_scroll_bars: |
2484 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) | |
30c566e4 | 2485 | { |
b1d1124b | 2486 | int start, end, whole; |
30c566e4 | 2487 | |
b1d1124b | 2488 | /* Calculate the start and end positions for the current window. |
3505ea70 JB |
2489 | At some point, it would be nice to choose between scrollbars |
2490 | which reflect the whole buffer size, with special markers | |
2491 | indicating narrowing, and scrollbars which reflect only the | |
2492 | visible region. | |
2493 | ||
b1d1124b JB |
2494 | Note that minibuffers sometimes aren't displaying any text. */ |
2495 | if (! MINI_WINDOW_P (w) | |
2496 | || (w == XWINDOW (minibuf_window) && ! echo_area_glyphs)) | |
2497 | { | |
8a9311d7 | 2498 | whole = ZV - BEGV; |
4d641a15 | 2499 | start = marker_position (w->start) - BEGV; |
b1d1124b JB |
2500 | /* I don't think this is guaranteed to be right. For the |
2501 | moment, we'll pretend it is. */ | |
85f26be9 | 2502 | end = (Z - XINT (w->window_end_pos)) - BEGV; |
3505ea70 JB |
2503 | |
2504 | if (end < start) end = start; | |
8a9311d7 | 2505 | if (whole < (end - start)) whole = end - start; |
b1d1124b JB |
2506 | } |
2507 | else | |
2508 | start = end = whole = 0; | |
30c566e4 | 2509 | |
88f22aff | 2510 | /* Indicate what this scroll bar ought to be displaying now. */ |
7eb9ba41 | 2511 | (*set_vertical_scroll_bar_hook) (w, end - start, whole, start); |
30c566e4 | 2512 | |
88f22aff | 2513 | /* Note that we actually used the scroll bar attached to this window, |
30c566e4 | 2514 | so it shouldn't be deleted at the end of redisplay. */ |
88f22aff | 2515 | (*redeem_scroll_bar_hook) (w); |
30c566e4 | 2516 | } |
b1d1124b | 2517 | |
12adba34 | 2518 | TEMP_SET_PT_BOTH (opoint, opoint_byte); |
5ba50c51 | 2519 | if (really_switched_buffer) |
f72df6ac | 2520 | set_buffer_internal_1 (old); |
e481f960 RS |
2521 | else |
2522 | set_buffer_temp (old); | |
12adba34 | 2523 | TEMP_SET_PT_BOTH (lpoint, lpoint_byte); |
2e54982e RS |
2524 | |
2525 | unbind_to (count, Qnil); | |
a2889657 JB |
2526 | } |
2527 | \f | |
2528 | /* Do full redisplay on one window, starting at position `pos'. */ | |
2529 | ||
2530 | static void | |
2531 | try_window (window, pos) | |
2532 | Lisp_Object window; | |
2533 | register int pos; | |
2534 | { | |
2535 | register struct window *w = XWINDOW (window); | |
2536 | register int height = window_internal_height (w); | |
2537 | register int vpos = XFASTINT (w->top); | |
2538 | register int last_text_vpos = vpos; | |
44fa5b1e | 2539 | FRAME_PTR f = XFRAME (w->frame); |
b1d1124b | 2540 | int width = window_internal_width (w) - 1; |
a2889657 JB |
2541 | struct position val; |
2542 | ||
9cbab4ff RS |
2543 | /* POS should never be out of range! */ |
2544 | if (pos < XBUFFER (w->buffer)->begv | |
2545 | || pos > XBUFFER (w->buffer)->zv) | |
2546 | abort (); | |
2547 | ||
12adba34 RS |
2548 | if (XMARKER (w->start)->charpos != pos) |
2549 | Fset_marker (w->start, make_number (pos), Qnil); | |
2550 | ||
a2889657 JB |
2551 | cursor_vpos = -1; |
2552 | overlay_arrow_seen = 0; | |
ca26e1c8 | 2553 | zv_strings_seen = 0; |
a2889657 | 2554 | val.hpos = XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0; |
0f9c0ff0 | 2555 | val.ovstring_chars_done = 0; |
12adba34 RS |
2556 | val.bytepos = marker_byte_position (w->start); |
2557 | val.tab_offset = pos_tab_offset (w, pos, val.bytepos); | |
a2889657 JB |
2558 | |
2559 | while (--height >= 0) | |
2560 | { | |
12adba34 RS |
2561 | val = *display_text_line (w, pos, val.bytepos, vpos, |
2562 | val.hpos, val.tab_offset, | |
0f9c0ff0 | 2563 | val.ovstring_chars_done); |
1c9241f5 KH |
2564 | /* The following code is omitted because we maintain tab_offset |
2565 | in VAL. */ | |
2566 | #if 0 | |
a2889657 JB |
2567 | tab_offset += width; |
2568 | if (val.vpos) tab_offset = 0; | |
1c9241f5 | 2569 | #endif /* 0 */ |
a2889657 JB |
2570 | vpos++; |
2571 | if (pos != val.bufpos) | |
642eefc6 RS |
2572 | { |
2573 | int invis = 0; | |
e885523c | 2574 | #ifdef USE_TEXT_PROPERTIES |
642eefc6 | 2575 | Lisp_Object invis_prop; |
975d21ea AS |
2576 | invis_prop = Fget_char_property (make_number (val.bufpos - 1), |
2577 | Qinvisible, window); | |
642eefc6 | 2578 | invis = TEXT_PROP_MEANS_INVISIBLE (invis_prop); |
e885523c | 2579 | #endif |
642eefc6 RS |
2580 | |
2581 | last_text_vpos | |
2582 | /* Next line, unless prev line ended in end of buffer with no cr */ | |
2583 | = vpos - (val.vpos | |
12adba34 | 2584 | && (FETCH_BYTE (val.bytepos - 1) != '\n' || invis)); |
642eefc6 | 2585 | } |
a2889657 JB |
2586 | pos = val.bufpos; |
2587 | } | |
2588 | ||
2589 | /* If last line is continued in middle of character, | |
44fa5b1e | 2590 | include the split character in the text considered on the frame */ |
a2889657 JB |
2591 | if (val.hpos < (XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0)) |
2592 | pos++; | |
2593 | ||
44fa5b1e | 2594 | /* If bottom just moved off end of frame, change mode line percentage. */ |
a2889657 JB |
2595 | if (XFASTINT (w->window_end_pos) == 0 |
2596 | && Z != pos) | |
2597 | w->update_mode_line = Qt; | |
2598 | ||
44fa5b1e | 2599 | /* Say where last char on frame will be, once redisplay is finished. */ |
c2213350 KH |
2600 | XSETFASTINT (w->window_end_pos, Z - pos); |
2601 | XSETFASTINT (w->window_end_vpos, last_text_vpos - XFASTINT (w->top)); | |
a2889657 JB |
2602 | /* But that is not valid info until redisplay finishes. */ |
2603 | w->window_end_valid = Qnil; | |
2604 | } | |
2605 | \f | |
2606 | /* Try to redisplay when buffer is modified locally, | |
2607 | computing insert/delete line to preserve text outside | |
2608 | the bounds of the changes. | |
2609 | Return 1 if successful, 0 if if cannot tell what to do, | |
2610 | or -1 to tell caller to find a new window start, | |
2611 | or -2 to tell caller to do normal redisplay with same window start. */ | |
2612 | ||
2613 | static int | |
2614 | try_window_id (window) | |
2615 | Lisp_Object window; | |
2616 | { | |
12adba34 RS |
2617 | int pos, pos_byte; |
2618 | int opoint, opoint_byte; | |
a2889657 JB |
2619 | register struct window *w = XWINDOW (window); |
2620 | register int height = window_internal_height (w); | |
44fa5b1e | 2621 | FRAME_PTR f = XFRAME (w->frame); |
a2889657 JB |
2622 | int top = XFASTINT (w->top); |
2623 | int start = marker_position (w->start); | |
b1d1124b | 2624 | int width = window_internal_width (w) - 1; |
a2889657 JB |
2625 | int hscroll = XINT (w->hscroll); |
2626 | int lmargin = hscroll > 0 ? 1 - hscroll : 0; | |
ca26e1c8 | 2627 | int did_motion; |
a2889657 JB |
2628 | register int vpos; |
2629 | register int i, tem; | |
2630 | int last_text_vpos = 0; | |
2631 | int stop_vpos; | |
e24c997d KH |
2632 | int selective = (INTEGERP (current_buffer->selective_display) |
2633 | ? XINT (current_buffer->selective_display) | |
2634 | : !NILP (current_buffer->selective_display) ? -1 : 0); | |
a2889657 JB |
2635 | struct position val, bp, ep, xp, pp; |
2636 | int scroll_amount = 0; | |
2637 | int delta; | |
1c9241f5 | 2638 | int epto, old_tick; |
a2889657 | 2639 | |
12adba34 RS |
2640 | int start_byte = marker_byte_position (w->start); |
2641 | ||
a2889657 JB |
2642 | if (GPT - BEG < beg_unchanged) |
2643 | beg_unchanged = GPT - BEG; | |
2644 | if (Z - GPT < end_unchanged) | |
2645 | end_unchanged = Z - GPT; | |
2646 | ||
6a1dc7ac | 2647 | if (beg_unchanged + BEG < start) |
a2889657 JB |
2648 | return 0; /* Give up if changes go above top of window */ |
2649 | ||
2650 | /* Find position before which nothing is changed. */ | |
ca26e1c8 | 2651 | bp = *compute_motion (start, 0, lmargin, 0, |
1c9241f5 KH |
2652 | min (ZV, beg_unchanged + BEG), height, |
2653 | /* BUG FIX: See the comment of | |
12adba34 | 2654 | Fpos_visible_in_window_p (window.c). */ |
1c9241f5 | 2655 | - (1 << (BITS_PER_SHORT - 1)), |
12adba34 RS |
2656 | width, hscroll, |
2657 | pos_tab_offset (w, start, start_byte), | |
2658 | w); | |
a2889657 | 2659 | if (bp.vpos >= height) |
6e8290aa | 2660 | { |
632ab665 | 2661 | if (PT < bp.bufpos) |
6e8290aa | 2662 | { |
67481ae5 RS |
2663 | /* All changes are beyond the window end, and point is on the screen. |
2664 | We don't need to change the text at all. | |
6e8290aa JB |
2665 | But we need to update window_end_pos to account for |
2666 | any change in buffer size. */ | |
ca26e1c8 | 2667 | bp = *compute_motion (start, 0, lmargin, 0, |
1c9241f5 KH |
2668 | ZV, height, |
2669 | /* BUG FIX: See the comment of | |
2670 | Fpos_visible_in_window_p() (window.c). */ | |
2671 | - (1 << (BITS_PER_SHORT - 1)), | |
12adba34 RS |
2672 | width, hscroll, |
2673 | pos_tab_offset (w, start, start_byte), w); | |
c2213350 KH |
2674 | XSETFASTINT (w->window_end_vpos, height); |
2675 | XSETFASTINT (w->window_end_pos, Z - bp.bufpos); | |
4d641a15 | 2676 | goto findpoint; |
6e8290aa JB |
2677 | } |
2678 | return 0; | |
2679 | } | |
a2889657 JB |
2680 | |
2681 | vpos = bp.vpos; | |
2682 | ||
44fa5b1e | 2683 | /* Find beginning of that frame line. Must display from there. */ |
210e752f | 2684 | bp = *vmotion (bp.bufpos, 0, w); |
a2889657 JB |
2685 | |
2686 | pos = bp.bufpos; | |
12adba34 | 2687 | pos_byte = bp.bytepos; |
a2889657 JB |
2688 | val.hpos = lmargin; |
2689 | if (pos < start) | |
2690 | return -1; | |
2691 | ||
ca26e1c8 | 2692 | did_motion = 0; |
a2889657 | 2693 | /* If about to start displaying at the beginning of a continuation line, |
44fa5b1e | 2694 | really start with previous frame line, in case it was not |
a2889657 | 2695 | continued when last redisplayed */ |
05ba02eb JB |
2696 | if ((bp.contin && bp.bufpos - 1 == beg_unchanged && vpos > 0) |
2697 | || | |
2698 | /* Likewise if we have to worry about selective display. */ | |
9f412332 | 2699 | (selective > 0 && bp.bufpos - 1 == beg_unchanged && vpos > 0)) |
a2889657 | 2700 | { |
210e752f | 2701 | bp = *vmotion (bp.bufpos, -1, w); |
a2889657 JB |
2702 | --vpos; |
2703 | pos = bp.bufpos; | |
12adba34 | 2704 | pos_byte = bp.bytepos; |
a2889657 | 2705 | } |
1c9241f5 | 2706 | val.tab_offset = bp.tab_offset; /* Update tab offset. */ |
a2889657 JB |
2707 | |
2708 | if (bp.contin && bp.hpos != lmargin) | |
2709 | { | |
2710 | val.hpos = bp.prevhpos - width + lmargin; | |
daa3df26 | 2711 | val.tab_offset = bp.tab_offset + width - bp.prevhpos; |
ca26e1c8 | 2712 | did_motion = 1; |
93fdf93b | 2713 | DEC_BOTH (pos, pos_byte); |
a2889657 JB |
2714 | } |
2715 | ||
2716 | bp.vpos = vpos; | |
2717 | ||
2718 | /* Find first visible newline after which no more is changed. */ | |
12adba34 | 2719 | opoint = PT, opoint_byte = PT_BYTE; |
26a9b1f3 | 2720 | TEMP_SET_PT (Z - max (end_unchanged, Z - ZV)); |
12adba34 | 2721 | scan_newline (PT, PT_BYTE, ZV, ZV_BYTE, 1, 1); |
9f412332 | 2722 | if (selective > 0) |
12adba34 RS |
2723 | while (PT < ZV - 1 && indented_beyond_p (PT, PT_BYTE, selective)) |
2724 | scan_newline (PT, PT_BYTE, ZV, ZV_BYTE, 1, 1); | |
2725 | tem = PT; | |
26a9b1f3 | 2726 | TEMP_SET_PT_BOTH (opoint, opoint_byte); |
a2889657 JB |
2727 | |
2728 | /* Compute the cursor position after that newline. */ | |
ca26e1c8 | 2729 | ep = *compute_motion (pos, vpos, val.hpos, did_motion, tem, |
68be917d | 2730 | height, - (1 << (BITS_PER_SHORT - 1)), |
1c9241f5 KH |
2731 | width, hscroll, |
2732 | /* We have tab offset in VAL, use it. */ | |
2733 | val.tab_offset, w); | |
a2889657 | 2734 | |
44fa5b1e JB |
2735 | /* If changes reach past the text available on the frame, |
2736 | just display rest of frame. */ | |
a2889657 JB |
2737 | if (ep.bufpos > Z - XFASTINT (w->window_end_pos)) |
2738 | stop_vpos = height; | |
2739 | else | |
2740 | stop_vpos = ep.vpos; | |
2741 | ||
2742 | /* If no newline before ep, the line ep is on includes some changes | |
2743 | that must be displayed. Make sure we don't stop before it. */ | |
2744 | /* Also, if changes reach all the way until ep.bufpos, | |
2745 | it is possible that something was deleted after the | |
2746 | newline before it, so the following line must be redrawn. */ | |
2747 | if (stop_vpos == ep.vpos | |
2748 | && (ep.bufpos == BEGV | |
f1c87a7d | 2749 | || FETCH_BYTE (ep.bytepos - 1) != '\n' |
a2889657 JB |
2750 | || ep.bufpos == Z - end_unchanged)) |
2751 | stop_vpos = ep.vpos + 1; | |
2752 | ||
2753 | cursor_vpos = -1; | |
2754 | overlay_arrow_seen = 0; | |
ca26e1c8 | 2755 | zv_strings_seen = 0; |
a2889657 JB |
2756 | |
2757 | /* If changes do not reach to bottom of window, | |
2758 | figure out how much to scroll the rest of the window */ | |
2759 | if (stop_vpos < height) | |
2760 | { | |
2761 | /* Now determine how far up or down the rest of the window has moved */ | |
ca26e1c8 | 2762 | xp = *compute_motion (ep.bufpos, ep.vpos, ep.hpos, 1, |
a2889657 | 2763 | Z - XFASTINT (w->window_end_pos), |
1c9241f5 KH |
2764 | /* Don't care for VPOS... */ |
2765 | 1 << (BITS_PER_SHORT - 1), | |
2766 | /* ... nor HPOS. */ | |
2767 | 1 << (BITS_PER_SHORT - 1), | |
2768 | width, hscroll, ep.tab_offset, w); | |
a2889657 JB |
2769 | scroll_amount = xp.vpos - XFASTINT (w->window_end_vpos); |
2770 | ||
44fa5b1e | 2771 | /* Is everything on frame below the changes whitespace? |
a2889657 | 2772 | If so, no scrolling is really necessary. */ |
f1c87a7d | 2773 | for (i = ep.bytepos; i < xp.bytepos; i++) |
a2889657 | 2774 | { |
1c9241f5 | 2775 | tem = FETCH_BYTE (i); |
a2889657 JB |
2776 | if (tem != ' ' && tem != '\n' && tem != '\t') |
2777 | break; | |
2778 | } | |
f1c87a7d | 2779 | if (i == xp.bytepos) |
a2889657 JB |
2780 | return -2; |
2781 | ||
e8e536a9 KH |
2782 | XSETFASTINT (w->window_end_vpos, |
2783 | XFASTINT (w->window_end_vpos) + scroll_amount); | |
a2889657 | 2784 | |
44fa5b1e | 2785 | /* Before doing any scrolling, verify that point will be on frame. */ |
010a899e | 2786 | if (PT > ep.bufpos && !(PT <= xp.bufpos && xp.vpos < height)) |
a2889657 | 2787 | { |
ae3b1442 | 2788 | if (PT <= xp.bufpos) |
a2889657 | 2789 | { |
ca26e1c8 | 2790 | pp = *compute_motion (ep.bufpos, ep.vpos, ep.hpos, 1, |
68be917d | 2791 | PT, height, - (1 << (BITS_PER_SHORT - 1)), |
1c9241f5 KH |
2792 | width, hscroll, |
2793 | /* We have tab offset in EP, use it. */ | |
2794 | ep.tab_offset, w); | |
a2889657 JB |
2795 | } |
2796 | else | |
2797 | { | |
ca26e1c8 | 2798 | pp = *compute_motion (xp.bufpos, xp.vpos, xp.hpos, 1, |
68be917d | 2799 | PT, height, - (1 << (BITS_PER_SHORT - 1)), |
e37f06d7 | 2800 | width, hscroll, |
1c9241f5 KH |
2801 | /* We have tab offset in XP, use it. */ |
2802 | xp.tab_offset, w); | |
a2889657 | 2803 | } |
ae3b1442 | 2804 | if (pp.bufpos < PT || pp.vpos == height) |
a2889657 JB |
2805 | return 0; |
2806 | cursor_vpos = pp.vpos + top; | |
73f194f1 | 2807 | cursor_hpos = WINDOW_LEFT_MARGIN (w) + minmax (0, pp.hpos, width); |
a2889657 JB |
2808 | } |
2809 | ||
2810 | if (stop_vpos - scroll_amount >= height | |
2811 | || ep.bufpos == xp.bufpos) | |
2812 | { | |
2813 | if (scroll_amount < 0) | |
2814 | stop_vpos -= scroll_amount; | |
2815 | scroll_amount = 0; | |
2816 | /* In this path, we have altered window_end_vpos | |
2817 | and not left it negative. | |
2818 | We must make sure that, in case display is preempted | |
44fa5b1e | 2819 | before the frame changes to reflect what we do here, |
a2889657 | 2820 | further updates will not come to try_window_id |
44fa5b1e | 2821 | and assume the frame and window_end_vpos match. */ |
a2889657 JB |
2822 | blank_end_of_window = 1; |
2823 | } | |
2824 | else if (!scroll_amount) | |
0d231165 RS |
2825 | { |
2826 | /* Even if we don't need to scroll, we must adjust the | |
2827 | charstarts of subsequent lines (that we won't redisplay) | |
2828 | according to the amount of text inserted or deleted. */ | |
2829 | int oldpos = FRAME_CURRENT_GLYPHS (f)->charstarts[ep.vpos + top][0]; | |
2830 | int adjust = ep.bufpos - oldpos; | |
2831 | adjust_window_charstarts (w, ep.vpos + top - 1, adjust); | |
2832 | } | |
a2889657 JB |
2833 | else if (bp.bufpos == Z - end_unchanged) |
2834 | { | |
2835 | /* If reprinting everything is nearly as fast as scrolling, | |
2836 | don't bother scrolling. Can happen if lines are short. */ | |
44fa5b1e | 2837 | if (scroll_cost (f, bp.vpos + top - scroll_amount, |
a2889657 JB |
2838 | top + height - max (0, scroll_amount), |
2839 | scroll_amount) | |
2840 | > xp.bufpos - bp.bufpos - 20) | |
2841 | /* Return "try normal display with same window-start." | |
2842 | Too bad we can't prevent further scroll-thinking. */ | |
2843 | return -2; | |
2844 | /* If pure deletion, scroll up as many lines as possible. | |
2845 | In common case of killing a line, this can save the | |
2846 | following line from being overwritten by scrolling | |
2847 | and therefore having to be redrawn. */ | |
44fa5b1e | 2848 | tem = scroll_frame_lines (f, bp.vpos + top - scroll_amount, |
d1cb44a4 RS |
2849 | top + height - max (0, scroll_amount), |
2850 | scroll_amount, bp.bufpos); | |
d2f84654 RS |
2851 | if (!tem) |
2852 | stop_vpos = height; | |
2853 | else | |
2854 | { | |
2855 | /* scroll_frame_lines did not properly adjust subsequent | |
2856 | lines' charstarts in the case where the text of the | |
2857 | screen line at bp.vpos has changed. | |
2858 | (This can happen in a deletion that ends in mid-line.) | |
8e6208c5 KH |
2859 | To adjust properly, we need to make things consistent |
2860 | at the position ep. | |
d2f84654 RS |
2861 | So do a second adjust to make that happen. |
2862 | Note that stop_vpos >= ep.vpos, so it is sufficient | |
2863 | to update the charstarts for lines at ep.vpos and below. */ | |
2864 | int oldstart | |
2865 | = FRAME_CURRENT_GLYPHS (f)->charstarts[ep.vpos + top][0]; | |
2866 | adjust_window_charstarts (w, ep.vpos + top - 1, | |
2867 | ep.bufpos - oldstart); | |
2868 | } | |
a2889657 JB |
2869 | } |
2870 | else if (scroll_amount) | |
2871 | { | |
2872 | /* If reprinting everything is nearly as fast as scrolling, | |
2873 | don't bother scrolling. Can happen if lines are short. */ | |
2874 | /* Note that if scroll_amount > 0, xp.bufpos - bp.bufpos is an | |
2875 | overestimate of cost of reprinting, since xp.bufpos | |
2876 | would end up below the bottom of the window. */ | |
44fa5b1e | 2877 | if (scroll_cost (f, ep.vpos + top - scroll_amount, |
a2889657 JB |
2878 | top + height - max (0, scroll_amount), |
2879 | scroll_amount) | |
2880 | > xp.bufpos - ep.bufpos - 20) | |
2881 | /* Return "try normal display with same window-start." | |
2882 | Too bad we can't prevent further scroll-thinking. */ | |
2883 | return -2; | |
44fa5b1e | 2884 | tem = scroll_frame_lines (f, ep.vpos + top - scroll_amount, |
a2889657 | 2885 | top + height - max (0, scroll_amount), |
d1cb44a4 | 2886 | scroll_amount, ep.bufpos); |
a2889657 JB |
2887 | if (!tem) stop_vpos = height; |
2888 | } | |
2889 | } | |
2890 | ||
2891 | /* In any case, do not display past bottom of window */ | |
2892 | if (stop_vpos >= height) | |
2893 | { | |
2894 | stop_vpos = height; | |
2895 | scroll_amount = 0; | |
2896 | } | |
2897 | ||
2898 | /* Handle case where pos is before w->start -- | |
2899 | can happen if part of line had been clipped and is not clipped now */ | |
2900 | if (vpos == 0 && pos < marker_position (w->start)) | |
2901 | Fset_marker (w->start, make_number (pos), Qnil); | |
2902 | ||
12adba34 | 2903 | val.bytepos = pos_byte; |
d847cc36 | 2904 | val.ovstring_chars_done = 0; |
12adba34 | 2905 | |
a2889657 JB |
2906 | /* Redisplay the lines where the text was changed */ |
2907 | last_text_vpos = vpos; | |
1c9241f5 KH |
2908 | /* The following code is omitted because we maintain tab offset in |
2909 | val.tab_offset. */ | |
2910 | #if 0 | |
12adba34 | 2911 | tab_offset = pos_tab_offset (w, pos, pos_byte); |
a2889657 JB |
2912 | /* If we are starting display in mid-character, correct tab_offset |
2913 | to account for passing the line that that character really starts in. */ | |
2914 | if (val.hpos < lmargin) | |
2915 | tab_offset += width; | |
1c9241f5 | 2916 | #endif /* 0 */ |
d3413a53 | 2917 | old_tick = MODIFF; |
a2889657 JB |
2918 | while (vpos < stop_vpos) |
2919 | { | |
12adba34 RS |
2920 | val = *display_text_line (w, pos, val.bytepos, top + vpos++, |
2921 | val.hpos, val.tab_offset, | |
0f9c0ff0 | 2922 | val.ovstring_chars_done); |
d3413a53 RS |
2923 | /* If display_text_line ran a hook and changed some text, |
2924 | redisplay all the way to bottom of buffer | |
2925 | So that we show the changes. */ | |
2926 | if (old_tick != MODIFF) | |
2927 | stop_vpos = height; | |
1c9241f5 KH |
2928 | /* The following code is omitted because we maintain tab offset |
2929 | in val.tab_offset. */ | |
2930 | #if 0 | |
a2889657 JB |
2931 | tab_offset += width; |
2932 | if (val.vpos) tab_offset = 0; | |
1c9241f5 | 2933 | #endif |
a2889657 JB |
2934 | if (pos != val.bufpos) |
2935 | last_text_vpos | |
2936 | /* Next line, unless prev line ended in end of buffer with no cr */ | |
f1c87a7d | 2937 | = vpos - (val.vpos && FETCH_BYTE (val.bytepos - 1) != '\n'); |
a2889657 JB |
2938 | pos = val.bufpos; |
2939 | } | |
2940 | ||
2941 | /* There are two cases: | |
2942 | 1) we have displayed down to the bottom of the window | |
2943 | 2) we have scrolled lines below stop_vpos by scroll_amount */ | |
2944 | ||
2945 | if (vpos == height) | |
2946 | { | |
2947 | /* If last line is continued in middle of character, | |
44fa5b1e | 2948 | include the split character in the text considered on the frame */ |
a2889657 JB |
2949 | if (val.hpos < lmargin) |
2950 | val.bufpos++; | |
c2213350 KH |
2951 | XSETFASTINT (w->window_end_vpos, last_text_vpos); |
2952 | XSETFASTINT (w->window_end_pos, Z - val.bufpos); | |
a2889657 JB |
2953 | } |
2954 | ||
2955 | /* If scrolling made blank lines at window bottom, | |
2956 | redisplay to fill those lines */ | |
2957 | if (scroll_amount < 0) | |
2958 | { | |
2959 | /* Don't consider these lines for general-purpose scrolling. | |
2960 | That will save time in the scrolling computation. */ | |
44fa5b1e | 2961 | FRAME_SCROLL_BOTTOM_VPOS (f) = xp.vpos; |
a2889657 JB |
2962 | vpos = xp.vpos; |
2963 | pos = xp.bufpos; | |
12adba34 | 2964 | pos_byte = xp.bytepos; |
1c9241f5 KH |
2965 | val.hpos = xp.hpos; |
2966 | val.tab_offset = xp.tab_offset; | |
a2889657 | 2967 | if (pos == ZV) |
010a899e KH |
2968 | { /* Display from next line */ |
2969 | vpos = height + scroll_amount; | |
2970 | val.hpos = lmargin; | |
2971 | val.tab_offset = 0; | |
2972 | } | |
a2889657 JB |
2973 | else if (xp.contin && xp.hpos != lmargin) |
2974 | { | |
2975 | val.hpos = xp.prevhpos - width + lmargin; | |
1c9241f5 | 2976 | val.tab_offset = xp.tab_offset + bp.prevhpos - width; |
93fdf93b | 2977 | DEC_BOTH (pos, pos_byte); |
a2889657 JB |
2978 | } |
2979 | ||
2980 | blank_end_of_window = 1; | |
1c9241f5 KH |
2981 | /* The following code is omitted because we maintain tab offset |
2982 | in val.tab_offset. */ | |
2983 | #if 0 | |
12adba34 | 2984 | tab_offset = pos_tab_offset (w, pos, pos_byte); |
a2889657 JB |
2985 | /* If we are starting display in mid-character, correct tab_offset |
2986 | to account for passing the line that that character starts in. */ | |
2987 | if (val.hpos < lmargin) | |
2988 | tab_offset += width; | |
1c9241f5 | 2989 | #endif |
f1c87a7d | 2990 | val.bytepos = pos_byte; |
a2889657 JB |
2991 | while (vpos < height) |
2992 | { | |
12adba34 RS |
2993 | val = *display_text_line (w, pos, val.bytepos, |
2994 | top + vpos++, val.hpos, | |
1c9241f5 KH |
2995 | val.tab_offset, val.ovstring_chars_done); |
2996 | /* The following code is omitted because we maintain tab | |
2997 | offset in val.tab_offset. */ | |
2998 | #if 0 | |
a2889657 JB |
2999 | tab_offset += width; |
3000 | if (val.vpos) tab_offset = 0; | |
1c9241f5 | 3001 | #endif /* 0 */ |
a2889657 JB |
3002 | pos = val.bufpos; |
3003 | } | |
3004 | ||
3005 | /* Here is a case where display_text_line sets cursor_vpos wrong. | |
3006 | Make it be fixed up, below. */ | |
3007 | if (xp.bufpos == ZV | |
ae3b1442 | 3008 | && xp.bufpos == PT) |
a2889657 JB |
3009 | cursor_vpos = -1; |
3010 | } | |
3011 | ||
44fa5b1e | 3012 | /* If bottom just moved off end of frame, change mode line percentage. */ |
a2889657 JB |
3013 | if (XFASTINT (w->window_end_pos) == 0 |
3014 | && Z != val.bufpos) | |
3015 | w->update_mode_line = Qt; | |
3016 | ||
3017 | /* Attempt to adjust end-of-text positions to new bottom line */ | |
3018 | if (scroll_amount) | |
3019 | { | |
3020 | delta = height - xp.vpos; | |
3021 | if (delta < 0 | |
3022 | || (delta > 0 && xp.bufpos <= ZV) | |
3023 | || (delta == 0 && xp.hpos)) | |
3024 | { | |
210e752f | 3025 | val = *vmotion (Z - XFASTINT (w->window_end_pos), delta, w); |
c2213350 | 3026 | XSETFASTINT (w->window_end_pos, Z - val.bufpos); |
e8e536a9 KH |
3027 | XSETFASTINT (w->window_end_vpos, |
3028 | XFASTINT (w->window_end_vpos) + val.vpos); | |
a2889657 JB |
3029 | } |
3030 | } | |
3031 | ||
3032 | w->window_end_valid = Qnil; | |
3033 | ||
3034 | /* If point was not in a line that was displayed, find it */ | |
3035 | if (cursor_vpos < 0) | |
3036 | { | |
4d641a15 | 3037 | findpoint: |
1c9241f5 KH |
3038 | val = *compute_motion (start, 0, lmargin, 0, PT, |
3039 | /* Don't care for VPOS... */ | |
3040 | 1 << (BITS_PER_SHORT - 1), | |
3041 | /* ... nor HPOS. */ | |
3042 | 1 << (BITS_PER_SHORT - 1), | |
12adba34 RS |
3043 | width, hscroll, |
3044 | pos_tab_offset (w, start, start_byte), | |
3045 | w); | |
44fa5b1e | 3046 | /* Admit failure if point is off frame now */ |
a2889657 JB |
3047 | if (val.vpos >= height) |
3048 | { | |
3049 | for (vpos = 0; vpos < height; vpos++) | |
44fa5b1e | 3050 | cancel_line (vpos + top, f); |
a2889657 JB |
3051 | return 0; |
3052 | } | |
3053 | cursor_vpos = val.vpos + top; | |
73f194f1 | 3054 | cursor_hpos = WINDOW_LEFT_MARGIN (w) + minmax (0, val.hpos, width); |
a2889657 JB |
3055 | } |
3056 | ||
210e752f | 3057 | FRAME_CURSOR_X (f) = cursor_hpos; |
44fa5b1e | 3058 | FRAME_CURSOR_Y (f) = cursor_vpos; |
a2889657 JB |
3059 | |
3060 | if (debug_end_pos) | |
3061 | { | |
ca26e1c8 | 3062 | val = *compute_motion (start, 0, lmargin, 0, ZV, |
68be917d | 3063 | height, - (1 << (BITS_PER_SHORT - 1)), |
12adba34 RS |
3064 | width, hscroll, |
3065 | pos_tab_offset (w, start, start_byte), | |
3066 | w); | |
a2889657 JB |
3067 | if (val.vpos != XFASTINT (w->window_end_vpos)) |
3068 | abort (); | |
3069 | if (XFASTINT (w->window_end_pos) | |
3070 | != Z - val.bufpos) | |
3071 | abort (); | |
3072 | } | |
3073 | ||
3074 | return 1; | |
3075 | } | |
3076 | \f | |
278feba9 | 3077 | /* Copy LEN glyphs starting address FROM to the rope TO. |
f7430cb6 | 3078 | But don't actually copy the parts that would come in before S. |
278feba9 RS |
3079 | Value is TO, advanced past the copied data. |
3080 | F is the frame we are displaying in. */ | |
a2889657 | 3081 | |
278feba9 RS |
3082 | static GLYPH * |
3083 | copy_part_of_rope (f, to, s, from, len, face) | |
3084 | FRAME_PTR f; | |
3085 | register GLYPH *to; /* Copy to here. */ | |
a2889657 | 3086 | register GLYPH *s; /* Starting point. */ |
278feba9 RS |
3087 | Lisp_Object *from; /* Data to copy. */ |
3088 | int len; | |
1c2250c2 | 3089 | int face; /* Face to apply to glyphs which don't specify one. */ |
a2889657 | 3090 | { |
278feba9 RS |
3091 | int n = len; |
3092 | register Lisp_Object *fp = from; | |
3093 | /* These cache the results of the last call to compute_glyph_face. */ | |
3094 | int last_code = -1; | |
3095 | int last_merged = 0; | |
c581d710 | 3096 | |
87485d6f | 3097 | #ifdef HAVE_FACES |
4cdc65eb KH |
3098 | if (! FRAME_TERMCAP_P (f)) |
3099 | while (n--) | |
3100 | { | |
e57bca5d | 3101 | GLYPH glyph = (INTEGERP (*fp) ? XFASTINT (*fp) : 0); |
4cdc65eb | 3102 | int facecode; |
e57bca5d KH |
3103 | unsigned int c = FAST_GLYPH_CHAR (glyph); |
3104 | ||
3105 | if (c > MAX_CHAR) | |
3106 | /* For an invalid character code, use space. */ | |
3107 | c = ' '; | |
4cdc65eb KH |
3108 | |
3109 | if (FAST_GLYPH_FACE (glyph) == 0) | |
3110 | /* If GLYPH has no face code, use FACE. */ | |
3111 | facecode = face; | |
3112 | else if (FAST_GLYPH_FACE (glyph) == last_code) | |
3113 | /* If it's same as previous glyph, use same result. */ | |
3114 | facecode = last_merged; | |
3115 | else | |
3116 | { | |
3117 | /* Merge this glyph's face and remember the result. */ | |
3118 | last_code = FAST_GLYPH_FACE (glyph); | |
3119 | last_merged = facecode = compute_glyph_face (f, last_code, face); | |
3120 | } | |
b2a76982 | 3121 | |
4cdc65eb | 3122 | if (to >= s) |
e57bca5d | 3123 | *to = FAST_MAKE_GLYPH (c, facecode); |
4cdc65eb KH |
3124 | ++to; |
3125 | ++fp; | |
3126 | } | |
3127 | else | |
3128 | #endif | |
3129 | while (n--) | |
3130 | { | |
dedd1182 | 3131 | if (to >= s) *to = (INTEGERP (*fp) ? XFASTINT (*fp) : 0); |
4cdc65eb KH |
3132 | ++to; |
3133 | ++fp; | |
3134 | } | |
278feba9 | 3135 | return to; |
c581d710 RS |
3136 | } |
3137 | ||
278feba9 RS |
3138 | /* Correct a glyph by replacing its specified user-level face code |
3139 | with a displayable computed face code. */ | |
c581d710 | 3140 | |
278feba9 | 3141 | static GLYPH |
659a218f | 3142 | fix_glyph (f, glyph, cface) |
278feba9 RS |
3143 | FRAME_PTR f; |
3144 | GLYPH glyph; | |
659a218f | 3145 | int cface; |
c581d710 | 3146 | { |
87485d6f | 3147 | #ifdef HAVE_FACES |
659a218f KH |
3148 | if (! FRAME_TERMCAP_P (f)) |
3149 | { | |
3150 | if (FAST_GLYPH_FACE (glyph) != 0) | |
3151 | cface = compute_glyph_face (f, FAST_GLYPH_FACE (glyph), cface); | |
3152 | glyph = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (glyph), cface); | |
3153 | } | |
4cdc65eb KH |
3154 | #endif |
3155 | return glyph; | |
a2889657 JB |
3156 | } |
3157 | \f | |
12adba34 | 3158 | /* Return the column of position POS / POS_BYTE in window W's buffer. |
4a4c24d0 RS |
3159 | When used on the character at the beginning of a line, |
3160 | starting at column 0, this says how much to subtract from | |
3161 | the column position of any character in the line | |
3162 | to get its horizontal position on the screen. */ | |
12adba34 RS |
3163 | |
3164 | static int | |
3165 | pos_tab_offset (w, pos, pos_byte) | |
3166 | struct window *w; | |
3167 | register int pos, pos_byte; | |
3168 | { | |
3169 | int opoint = PT; | |
3170 | int opoint_byte = PT_BYTE; | |
3171 | int col; | |
3172 | int width = window_internal_width (w) - 1; | |
3173 | ||
3174 | if (pos == BEGV) | |
3175 | return MINI_WINDOW_P (w) ? -minibuf_prompt_width : 0; | |
3176 | ||
3177 | if (FETCH_BYTE (pos_byte - 1) == '\n') | |
3178 | return 0; | |
3179 | ||
3180 | TEMP_SET_PT_BOTH (pos, pos_byte); | |
3181 | col = current_column (); | |
3182 | TEMP_SET_PT_BOTH (opoint, opoint_byte); | |
3183 | ||
3184 | return col; | |
3185 | } | |
81d2de9b | 3186 | \f |
12adba34 RS |
3187 | /* Display one line of window W, starting at char position START in W's buffer. |
3188 | START_BYTE is the corresponding byte position. | |
f4faa47c JB |
3189 | |
3190 | Display starting at horizontal position HPOS, expressed relative to | |
3191 | W's left edge. In situations where the text at START shouldn't | |
3192 | start at the left margin (i.e. when the window is hscrolled, or | |
3193 | we're continuing a line which left off in the midst of a | |
3194 | multi-column character), HPOS should be negative; we throw away | |
3195 | characters up 'til hpos = 0. So, HPOS must take hscrolling into | |
3196 | account. | |
a2889657 JB |
3197 | |
3198 | TABOFFSET is an offset for ostensible hpos, used in tab stop calculations. | |
3199 | ||
0f9c0ff0 RS |
3200 | OVSTR_DONE is the number of chars of overlay before/after strings |
3201 | at this position which have already been processed. | |
3202 | ||
f4faa47c JB |
3203 | Display on position VPOS on the frame. It is origin 0, relative to |
3204 | the top of the frame, not W. | |
a2889657 JB |
3205 | |
3206 | Returns a STRUCT POSITION giving character to start next line with | |
3207 | and where to display it, including a zero or negative hpos. | |
3208 | The vpos field is not really a vpos; it is 1 unless the line is continued */ | |
3209 | ||
3210 | struct position val_display_text_line; | |
3211 | ||
3212 | static struct position * | |
12adba34 | 3213 | display_text_line (w, start, start_byte, vpos, hpos, taboffset, ovstr_done) |
a2889657 JB |
3214 | struct window *w; |
3215 | int start; | |
3216 | int vpos; | |
3217 | int hpos; | |
3218 | int taboffset; | |
0f9c0ff0 | 3219 | int ovstr_done; |
a2889657 JB |
3220 | { |
3221 | register int pos = start; | |
12adba34 | 3222 | int pos_byte = start_byte; |
a2889657 JB |
3223 | register int c; |
3224 | register GLYPH *p1; | |
12adba34 | 3225 | int pause, limit_byte; |
a2889657 JB |
3226 | register unsigned char *p; |
3227 | GLYPH *endp; | |
d2f84654 | 3228 | register GLYPH *leftmargin; |
ca26e1c8 | 3229 | register GLYPH *p1prev; |
efc63ef0 | 3230 | register GLYPH *p1start; |
0d09d1e6 | 3231 | GLYPH *p1_wide_column_end = (GLYPH *) 0; |
12adba34 | 3232 | int prevpos, prevpos_byte; |
efc63ef0 | 3233 | int *charstart; |
44fa5b1e | 3234 | FRAME_PTR f = XFRAME (w->frame); |
a2889657 | 3235 | int tab_width = XINT (current_buffer->tab_width); |
265a9e55 | 3236 | int ctl_arrow = !NILP (current_buffer->ctl_arrow); |
b1d1124b | 3237 | int width = window_internal_width (w) - 1; |
a2889657 | 3238 | struct position val; |
12adba34 | 3239 | int lastpos, lastpos_byte; |
a2889657 | 3240 | int invis; |
642eefc6 RS |
3241 | int last_invis_skip = 0; |
3242 | Lisp_Object last_invis_prop; | |
a2889657 | 3243 | int hscroll = XINT (w->hscroll); |
d2f84654 RS |
3244 | int truncate = (hscroll |
3245 | || (truncate_partial_width_windows | |
73f194f1 | 3246 | && !WINDOW_FULL_WIDTH_P (w)) |
d2f84654 | 3247 | || !NILP (current_buffer->truncate_lines)); |
bd66d1ba | 3248 | |
409bb864 | 3249 | /* 1 if this buffer has a region to highlight. */ |
bd66d1ba | 3250 | int highlight_region |
2bf32c5d | 3251 | = (!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active) |
409bb864 | 3252 | && XMARKER (current_buffer->mark)->buffer != 0); |
bd66d1ba RS |
3253 | int region_beg, region_end; |
3254 | ||
e24c997d KH |
3255 | int selective = (INTEGERP (current_buffer->selective_display) |
3256 | ? XINT (current_buffer->selective_display) | |
3257 | : !NILP (current_buffer->selective_display) ? -1 : 0); | |
44fa5b1e | 3258 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (f); |
f908610f | 3259 | register struct Lisp_Char_Table *dp = window_display_table (w); |
68a37fa8 RS |
3260 | |
3261 | Lisp_Object default_invis_vector[3]; | |
642eefc6 RS |
3262 | /* Number of characters of ellipsis to display after an invisible line |
3263 | if it calls for an ellipsis. | |
3264 | Note that this value can be nonzero regardless of whether | |
3265 | selective display is enabled--you must check that separately. */ | |
a2889657 | 3266 | int selective_rlen |
642eefc6 | 3267 | = (dp && VECTORP (DISP_INVIS_VECTOR (dp)) |
68a37fa8 | 3268 | ? XVECTOR (DISP_INVIS_VECTOR (dp))->size |
642eefc6 | 3269 | : !NILP (current_buffer->selective_display_ellipses) ? 3 : 0); |
68a37fa8 RS |
3270 | /* This is the sequence of Lisp objects to display |
3271 | when there are invisible lines. */ | |
3272 | Lisp_Object *invis_vector_contents | |
e24c997d | 3273 | = (dp && VECTORP (DISP_INVIS_VECTOR (dp)) |
68a37fa8 RS |
3274 | ? XVECTOR (DISP_INVIS_VECTOR (dp))->contents |
3275 | : default_invis_vector); | |
3276 | ||
e24c997d | 3277 | GLYPH truncator = (dp == 0 || !INTEGERP (DISP_TRUNC_GLYPH (dp)) |
e57bca5d | 3278 | || !GLYPH_CHAR_VALID_P (XINT (DISP_TRUNC_GLYPH (dp))) |
278feba9 | 3279 | ? '$' : XINT (DISP_TRUNC_GLYPH (dp))); |
e24c997d | 3280 | GLYPH continuer = (dp == 0 || !INTEGERP (DISP_CONTINUE_GLYPH (dp)) |
e57bca5d | 3281 | || !GLYPH_CHAR_VALID_P (XINT (DISP_CONTINUE_GLYPH (dp))) |
278feba9 | 3282 | ? '\\' : XINT (DISP_CONTINUE_GLYPH (dp))); |
a2889657 | 3283 | |
1c9241f5 KH |
3284 | /* If 1, we must handle multibyte characters. */ |
3285 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); | |
3286 | /* Length of multibyte form of each character. */ | |
3287 | int len; | |
3288 | /* Glyphs generated should be set this bit mask if text must be | |
3289 | displayed from right to left. */ | |
3290 | GLYPH rev_dir_bit = (NILP (current_buffer->direction_reversed) | |
3291 | ? 0 : GLYPH_MASK_REV_DIR); | |
3292 | ||
31b24551 JB |
3293 | /* The next buffer location at which the face should change, due |
3294 | to overlays or text property changes. */ | |
3295 | int next_face_change; | |
3296 | ||
ca26e1c8 KH |
3297 | /* The next location where the `invisible' property changes, or an |
3298 | overlay starts or ends. */ | |
3299 | int next_boundary; | |
3300 | ||
31b24551 | 3301 | /* The face we're currently using. */ |
1c2250c2 | 3302 | int current_face = 0; |
efc63ef0 | 3303 | int i; |
31b24551 | 3304 | |
c2213350 | 3305 | XSETFASTINT (default_invis_vector[2], '.'); |
68a37fa8 RS |
3306 | default_invis_vector[0] = default_invis_vector[1] = default_invis_vector[2]; |
3307 | ||
73f194f1 | 3308 | get_display_line (f, vpos, WINDOW_LEFT_MARGIN (w)); |
54ff581a | 3309 | if (tab_width <= 0 || tab_width > 1000) tab_width = 8; |
a2889657 | 3310 | |
bd66d1ba | 3311 | /* Show where to highlight the region. */ |
409bb864 | 3312 | if (highlight_region |
fba9ce76 RS |
3313 | /* Maybe highlight only in selected window. */ |
3314 | && (highlight_nonselected_windows | |
409bb864 KH |
3315 | || w == XWINDOW (selected_window) |
3316 | || (MINI_WINDOW_P (XWINDOW (selected_window)) | |
3317 | && w == XWINDOW (Vminibuf_scroll_window)))) | |
bd66d1ba RS |
3318 | { |
3319 | region_beg = marker_position (current_buffer->mark); | |
3320 | if (PT < region_beg) | |
3321 | { | |
3322 | region_end = region_beg; | |
3323 | region_beg = PT; | |
3324 | } | |
3325 | else | |
3326 | region_end = PT; | |
3327 | w->region_showing = Qt; | |
3328 | } | |
3329 | else | |
3ee4159a RS |
3330 | { |
3331 | region_beg = region_end = -1; | |
3332 | w->region_showing = Qnil; | |
3333 | } | |
bd66d1ba | 3334 | |
f4faa47c | 3335 | if (MINI_WINDOW_P (w) |
ca26e1c8 | 3336 | && start == BEG |
a2889657 JB |
3337 | && vpos == XFASTINT (w->top)) |
3338 | { | |
8c5b6a0a | 3339 | if (! NILP (minibuf_prompt)) |
f7b4b63a | 3340 | { |
12a274bf RS |
3341 | int old_width = minibuf_prompt_width; |
3342 | ||
f7b4b63a | 3343 | minibuf_prompt_width |
8c5b6a0a | 3344 | = (display_string (w, vpos, XSTRING (minibuf_prompt)->data, |
fc932ac6 | 3345 | STRING_BYTES (XSTRING (minibuf_prompt)), |
377dbd97 | 3346 | hpos + WINDOW_LEFT_MARGIN (w), |
ce006f69 RS |
3347 | /* Display a space if we truncate. */ |
3348 | ' ', | |
3349 | 1, -1, | |
3350 | /* Truncate the prompt a little before the | |
3351 | margin, so user input can at least start | |
3352 | on the first line. */ | |
8bb6ca14 | 3353 | (XFASTINT (w->width) > 10 |
a3788d53 | 3354 | ? XFASTINT (w->width) - 4 : -1), |
0a9dc68b | 3355 | STRING_MULTIBYTE (minibuf_prompt)) |
377dbd97 | 3356 | - hpos - WINDOW_LEFT_MARGIN (w)); |
f7b4b63a | 3357 | hpos += minibuf_prompt_width; |
12a274bf | 3358 | taboffset -= minibuf_prompt_width - old_width; |
f7b4b63a KH |
3359 | } |
3360 | else | |
3361 | minibuf_prompt_width = 0; | |
a2889657 JB |
3362 | } |
3363 | ||
f4faa47c JB |
3364 | /* If we're hscrolled at all, use compute_motion to skip over any |
3365 | text off the left edge of the window. compute_motion may know | |
3366 | tricks to do this faster than we can. */ | |
3367 | if (hpos < 0) | |
3368 | { | |
3369 | struct position *left_edge | |
ca26e1c8 KH |
3370 | = compute_motion (pos, vpos, hpos, 0, |
3371 | ZV, vpos, 0, | |
f4faa47c JB |
3372 | width, hscroll, taboffset, w); |
3373 | ||
3374 | /* Retrieve the buffer position and column provided by | |
3375 | compute_motion. We can't assume that the column will be | |
3376 | zero, because you may have multi-column characters crossing | |
3377 | the left margin. | |
3378 | ||
3379 | compute_motion may have moved us past the screen position we | |
3380 | requested, if we hit a multi-column character, or the end of | |
3381 | the line. If so, back up. */ | |
ffa286a2 RS |
3382 | if ((left_edge->vpos > vpos |
3383 | || left_edge->hpos > 0) | |
3384 | && left_edge->bufpos > pos) | |
f4faa47c | 3385 | { |
93fdf93b | 3386 | pos = left_edge->bufpos; |
0d09d1e6 | 3387 | pos_byte = left_edge->bytepos; |
93fdf93b | 3388 | DEC_BOTH (pos, pos_byte); |
f4faa47c JB |
3389 | hpos = left_edge->prevhpos; |
3390 | } | |
3391 | else | |
3392 | { | |
3393 | pos = left_edge->bufpos; | |
12adba34 | 3394 | pos_byte = left_edge->bytepos; |
f4faa47c JB |
3395 | hpos = left_edge->hpos; |
3396 | } | |
3397 | } | |
3398 | ||
377dbd97 RS |
3399 | hpos += WINDOW_LEFT_MARGIN (w); |
3400 | ||
f4faa47c | 3401 | desired_glyphs->bufp[vpos] = start; |
a2889657 | 3402 | p1 = desired_glyphs->glyphs[vpos] + hpos; |
efc63ef0 RS |
3403 | p1start = p1; |
3404 | charstart = desired_glyphs->charstarts[vpos] + hpos; | |
3405 | /* In case we don't ever write anything into it... */ | |
73f194f1 RS |
3406 | desired_glyphs->charstarts[vpos][WINDOW_LEFT_MARGIN (w)] = -1; |
3407 | leftmargin = desired_glyphs->glyphs[vpos] + WINDOW_LEFT_MARGIN (w); | |
d2f84654 | 3408 | endp = leftmargin + width; |
a2889657 | 3409 | |
1c2250c2 JB |
3410 | /* Arrange the overlays nicely for our purposes. Usually, we call |
3411 | display_text_line on only one line at a time, in which case this | |
3412 | can't really hurt too much, or we call it on lines which appear | |
3413 | one after another in the buffer, in which case all calls to | |
3414 | recenter_overlay_lists but the first will be pretty cheap. */ | |
3415 | recenter_overlay_lists (current_buffer, pos); | |
3416 | ||
a2889657 JB |
3417 | /* Loop generating characters. |
3418 | Stop at end of buffer, before newline, | |
31b24551 JB |
3419 | if reach or pass continuation column, |
3420 | or at face change. */ | |
a2889657 | 3421 | pause = pos; |
12adba34 | 3422 | limit_byte = pos_byte; |
31b24551 | 3423 | next_face_change = pos; |
ca26e1c8 KH |
3424 | next_boundary = pos; |
3425 | p1prev = p1; | |
3426 | prevpos = pos; | |
12adba34 | 3427 | prevpos_byte = pos_byte; |
1fca3fae RS |
3428 | |
3429 | /* If the window is hscrolled and point is in the invisible part of the | |
3430 | current line beyond the left margin we can record the cursor location | |
3431 | right away. */ | |
3432 | if (hscroll && start <= PT && PT < pos && cursor_vpos < 0) | |
3433 | { | |
3434 | cursor_vpos = vpos; | |
3435 | cursor_hpos = p1 - leftmargin; | |
3436 | } | |
3437 | ||
2384c010 | 3438 | while (p1 < endp) |
a2889657 | 3439 | { |
31b24551 | 3440 | if (pos >= pause) |
a2889657 | 3441 | { |
67481ae5 RS |
3442 | int e_t_h; |
3443 | ||
ca26e1c8 | 3444 | while (pos == next_boundary) |
a2889657 | 3445 | { |
ca26e1c8 KH |
3446 | Lisp_Object position, limit, prop, ww; |
3447 | ||
3448 | /* Display the overlay strings here, unless we're at ZV | |
3449 | and have already displayed the appropriate strings | |
3450 | on an earlier line. */ | |
3451 | if (pos < ZV || !zv_strings_seen++) | |
3452 | { | |
3453 | int ovlen; | |
b4222ffa | 3454 | unsigned char *ovstr; |
ca26e1c8 | 3455 | ovlen = overlay_strings (pos, w, &ovstr); |
0f9c0ff0 RS |
3456 | |
3457 | if (ovlen > 0) | |
ca26e1c8 | 3458 | { |
0f9c0ff0 RS |
3459 | /* Skip the ones we did in a previous line. */ |
3460 | ovstr += ovstr_done; | |
3461 | ovlen -= ovstr_done; | |
3462 | ||
919c7723 | 3463 | while (ovlen > 0 && p1 < endp) |
0f9c0ff0 | 3464 | { |
1c9241f5 KH |
3465 | int charset, cols; |
3466 | GLYPH g; | |
3467 | ||
3468 | if (multibyte) | |
3469 | { | |
3470 | c = STRING_CHAR_AND_LENGTH (ovstr, ovlen, len); | |
3471 | ovstr += len, ovlen -= len, ovstr_done += len; | |
3472 | charset = CHAR_CHARSET (c); | |
3473 | cols = (charset == CHARSET_COMPOSITION | |
3474 | ? cmpchar_table[COMPOSITE_CHAR_ID (c)]->width | |
3475 | : CHARSET_WIDTH (charset)); | |
3476 | } | |
3477 | else | |
3478 | { | |
3479 | c = *ovstr++, ovlen--, ovstr_done++; | |
3480 | cols = 1; | |
3481 | } | |
3482 | g = MAKE_GLYPH (f, c, current_face) | rev_dir_bit; | |
3483 | while (cols-- > 0) | |
3484 | { | |
3485 | if (p1 >= leftmargin && p1 < endp) | |
3486 | *p1 = g, g |= GLYPH_MASK_PADDING; | |
3487 | p1++; | |
3488 | } | |
0f9c0ff0 RS |
3489 | } |
3490 | /* If we did all the overlay strings | |
3491 | and we have room for text, clear ovstr_done | |
3492 | just for neatness' sake. */ | |
3493 | if (ovlen == 0 && p1 < endp) | |
3494 | ovstr_done = 0; | |
ca26e1c8 KH |
3495 | } |
3496 | } | |
3497 | ||
3498 | /* Did we reach point? Record the cursor location. */ | |
3499 | if (pos == PT && cursor_vpos < 0) | |
3500 | { | |
3501 | cursor_vpos = vpos; | |
3502 | cursor_hpos = p1 - leftmargin; | |
3503 | } | |
3504 | ||
3505 | if (pos >= ZV) | |
3506 | break; | |
a2889657 | 3507 | |
c2213350 | 3508 | XSETFASTINT (position, pos); |
ca26e1c8 KH |
3509 | limit = Fnext_overlay_change (position); |
3510 | #ifdef USE_TEXT_PROPERTIES | |
dfabd9a0 RS |
3511 | /* This is just an estimate to give reasonable |
3512 | performance; nothing should go wrong if it is too small. */ | |
fe3d6921 | 3513 | if (XFASTINT (limit) > pos + 50) |
1c9241f5 KH |
3514 | { |
3515 | int limitpos = pos + 50; | |
1c9241f5 KH |
3516 | XSETFASTINT (limit, limitpos); |
3517 | } | |
ca26e1c8 KH |
3518 | limit = Fnext_single_property_change (position, Qinvisible, |
3519 | Fcurrent_buffer (), limit); | |
3520 | #endif | |
3521 | next_boundary = XFASTINT (limit); | |
3522 | /* if the `invisible' property is set, we can skip to | |
3523 | the next property change. */ | |
3524 | XSETWINDOW (ww, w); | |
3525 | prop = Fget_char_property (position, Qinvisible, ww); | |
642eefc6 | 3526 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) |
dfabd9a0 | 3527 | { |
ca26e1c8 | 3528 | if (pos < PT && next_boundary >= PT) |
dfabd9a0 RS |
3529 | { |
3530 | cursor_vpos = vpos; | |
d2f84654 | 3531 | cursor_hpos = p1 - leftmargin; |
dfabd9a0 | 3532 | } |
ca26e1c8 | 3533 | pos = next_boundary; |
f6e7abc1 | 3534 | pos_byte = CHAR_TO_BYTE (pos); |
642eefc6 RS |
3535 | last_invis_skip = pos; |
3536 | last_invis_prop = prop; | |
dfabd9a0 | 3537 | } |
b0a0fbda | 3538 | } |
ca26e1c8 KH |
3539 | |
3540 | /* Did we reach point? Record the cursor location. */ | |
3541 | if (pos == PT && cursor_vpos < 0) | |
3542 | { | |
3543 | cursor_vpos = vpos; | |
3544 | cursor_hpos = p1 - leftmargin; | |
3545 | } | |
3546 | ||
3547 | /* Did we hit the end of the visible region of the buffer? | |
3548 | Stop here. */ | |
3549 | if (pos >= ZV) | |
eff87c2c RS |
3550 | { |
3551 | /* Update charstarts for the end of this line. */ | |
3552 | /* Do nothing if off the left edge or at the right edge. */ | |
3553 | if (p1 >= leftmargin && p1 + 1 != endp) | |
3554 | { | |
3555 | int *p2x = &charstart[(p1 < leftmargin | |
3556 | ? leftmargin : p1) | |
3557 | - p1start]; | |
3558 | *p2x++ = pos; | |
3559 | } | |
3560 | break; | |
3561 | } | |
b0a0fbda | 3562 | |
67481ae5 RS |
3563 | /* Figure out where (if at all) the |
3564 | redisplay_end_trigger-hook should run. */ | |
f6fd109b RS |
3565 | if (MARKERP (w->redisplay_end_trigger) |
3566 | && XMARKER (w->redisplay_end_trigger)->buffer != 0) | |
d3413a53 RS |
3567 | e_t_h = marker_position (w->redisplay_end_trigger); |
3568 | else if (INTEGERP (w->redisplay_end_trigger)) | |
3569 | e_t_h = XINT (w->redisplay_end_trigger); | |
67481ae5 RS |
3570 | else |
3571 | e_t_h = ZV; | |
3572 | ||
3573 | /* If we've gone past the place to run a hook, | |
3574 | run the hook. */ | |
3575 | if (pos >= e_t_h && e_t_h != ZV) | |
3576 | { | |
e0bfbde6 RS |
3577 | Lisp_Object args[3]; |
3578 | ||
3579 | args[0] = Qredisplay_end_trigger_functions; | |
3580 | XSETWINDOW (args[1], w); | |
3581 | XSETINT (args[2], e_t_h); | |
e0bfbde6 | 3582 | |
9c49d3d7 KH |
3583 | /* Since we are *trying* to run these functions, |
3584 | don't try to run them again, even if they get an error. */ | |
d3413a53 | 3585 | w->redisplay_end_trigger = Qnil; |
9c49d3d7 KH |
3586 | Frun_hook_with_args (3, args); |
3587 | ||
67481ae5 | 3588 | e_t_h = ZV; |
f6fd109b RS |
3589 | /* Notice if it changed the face of this character. */ |
3590 | next_face_change = pos; | |
67481ae5 RS |
3591 | } |
3592 | ||
f6fd109b RS |
3593 | #ifdef HAVE_FACES |
3594 | /* Did we hit a face change? Figure out what face we should | |
3595 | use now. We also hit this the first time through the | |
3596 | loop, to see what face we should start with. */ | |
ab6ce60e RS |
3597 | if (pos >= next_face_change |
3598 | && (FRAME_WINDOW_P (f) || FRAME_MSDOS_P (f))) | |
1c9241f5 KH |
3599 | { |
3600 | int limit = pos + 50; | |
3601 | ||
1c9241f5 KH |
3602 | current_face = compute_char_face (f, w, pos, |
3603 | region_beg, region_end, | |
3604 | &next_face_change, limit, 0); | |
3605 | } | |
f6fd109b RS |
3606 | #endif |
3607 | ||
67481ae5 RS |
3608 | /* Compute the next place we need to stop |
3609 | and do something special; set PAUSE. */ | |
3610 | ||
ca26e1c8 | 3611 | pause = ZV; |
1c2250c2 | 3612 | |
ca26e1c8 KH |
3613 | if (pos < next_boundary && next_boundary < pause) |
3614 | pause = next_boundary; | |
1c2250c2 JB |
3615 | if (pos < next_face_change && next_face_change < pause) |
3616 | pause = next_face_change; | |
3617 | ||
67481ae5 RS |
3618 | if (e_t_h < pause) |
3619 | pause = e_t_h; | |
3620 | ||
31b24551 JB |
3621 | /* Wouldn't you hate to read the next line to someone over |
3622 | the phone? */ | |
ae3b1442 KH |
3623 | if (pos < PT && PT < pause) |
3624 | pause = PT; | |
a2889657 JB |
3625 | if (pos < GPT && GPT < pause) |
3626 | pause = GPT; | |
3627 | ||
12adba34 RS |
3628 | /* LIMIT_BYTE is not the same place in the buffer as PAUSE. |
3629 | It is a limit on valid characters. | |
3630 | We use it to bound STRING_CHAR_AND_LENGTH. */ | |
3631 | limit_byte = ZV_BYTE; | |
3632 | if (pos < GPT && GPT_BYTE < limit_byte) | |
3633 | limit_byte = GPT_BYTE; | |
3634 | ||
3635 | { | |
3636 | int temp = CHAR_TO_BYTE (pos); | |
3637 | p = BYTE_POS_ADDR (temp); | |
3638 | } | |
a2889657 | 3639 | } |
ca26e1c8 | 3640 | |
ca26e1c8 KH |
3641 | if (p1 >= endp) |
3642 | break; | |
3643 | ||
3644 | p1prev = p1; | |
0d09d1e6 | 3645 | p1_wide_column_end = (GLYPH *) 0; |
ca26e1c8 | 3646 | |
1c9241f5 | 3647 | if (multibyte) |
12adba34 | 3648 | c = STRING_CHAR_AND_LENGTH (p, limit_byte - pos_byte, len), p += len; |
1c9241f5 KH |
3649 | else |
3650 | c = *p++, len = 1; | |
376b0e59 RS |
3651 | /* Let a display table override all standard display methods. */ |
3652 | if (dp != 0 && VECTORP (DISP_CHAR_VECTOR (dp, c))) | |
3653 | { | |
3654 | p1 = copy_part_of_rope (f, p1, leftmargin, | |
3655 | XVECTOR (DISP_CHAR_VECTOR (dp, c))->contents, | |
3656 | XVECTOR (DISP_CHAR_VECTOR (dp, c))->size, | |
1c9241f5 | 3657 | current_face, rev_dir_bit); |
376b0e59 RS |
3658 | } |
3659 | else if (c >= 040 && c < 0177) | |
a2889657 | 3660 | { |
d2f84654 | 3661 | if (p1 >= leftmargin) |
1c9241f5 | 3662 | *p1 = MAKE_GLYPH (f, c, current_face) | rev_dir_bit; |
a2889657 JB |
3663 | p1++; |
3664 | } | |
3665 | else if (c == '\n') | |
3666 | { | |
1842fc1a RS |
3667 | #if 0 |
3668 | /* Same as p1prev, but after the invis_vector_contents text | |
3669 | (if we have that on this line). */ | |
3670 | GLYPH *p1prev_modified; | |
3671 | #endif | |
3672 | ||
a2889657 | 3673 | invis = 0; |
642eefc6 RS |
3674 | if (last_invis_skip == pos |
3675 | && TEXT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS (last_invis_prop)) | |
3676 | invis = 1; | |
ca26e1c8 | 3677 | while (pos + 1 < ZV |
a2889657 | 3678 | && selective > 0 |
12adba34 | 3679 | && indented_beyond_p (pos + 1, pos_byte + 1, selective)) |
a2889657 | 3680 | { |
12adba34 RS |
3681 | int opoint = PT, opoint_byte = PT_BYTE; |
3682 | ||
a2889657 | 3683 | invis = 1; |
9ce37c9d | 3684 | INC_BOTH (pos, pos_byte); |
12adba34 | 3685 | scan_newline (pos, pos_byte, ZV, ZV_BYTE, 1, 1); |
b5231eda | 3686 | pos = PT, pos_byte = PT_BYTE; |
12adba34 RS |
3687 | if (FETCH_BYTE (pos_byte - 1) == '\n') |
3688 | { | |
3689 | pos--; | |
3690 | pos_byte--; | |
3691 | } | |
26a9b1f3 | 3692 | TEMP_SET_PT_BOTH (opoint, opoint_byte); |
a2889657 | 3693 | } |
d2f84654 | 3694 | if (invis && selective_rlen > 0 && p1 >= leftmargin) |
a2889657 | 3695 | { |
1842fc1a RS |
3696 | #if 0 |
3697 | GLYPH *cs, *csend; | |
3698 | ||
3699 | cs = charstart + (p1 - p1start); | |
3700 | #endif | |
3701 | ||
a2889657 | 3702 | p1 += selective_rlen; |
d2f84654 | 3703 | if (p1 - leftmargin > width) |
a2889657 | 3704 | p1 = endp; |
1842fc1a RS |
3705 | |
3706 | #if 0 /* This needs more work; charstarts needs to record | |
3707 | both whether a position ho;ds an ellipsis character | |
3708 | and what buffer position it corresponds to. */ | |
3709 | csend = charstart + (p1 - p1start); | |
3710 | while (cs != csend) | |
3711 | *cs++ = -2; | |
3712 | /* The idea is to use p1prev_modified instead of p1prev | |
3713 | in the loop below over p2x. */ | |
3714 | p1prev_modified = p1; | |
3715 | #endif | |
3716 | ||
278feba9 | 3717 | copy_part_of_rope (f, p1prev, p1prev, invis_vector_contents, |
1c9241f5 | 3718 | (p1 - p1prev), current_face, rev_dir_bit); |
a2889657 | 3719 | } |
545e04f6 KH |
3720 | |
3721 | /* Update charstarts for the newline that ended this line. */ | |
3722 | /* Do nothing here for a char that's entirely off the left edge | |
3723 | or if it starts at the right edge. */ | |
3724 | if (p1 >= leftmargin && p1prev != endp) | |
3725 | { | |
3726 | /* Store the newline's position into charstarts | |
3727 | for the column where the newline starts. | |
3728 | Store -1 for the rest of the glyphs it occupies. */ | |
3729 | int *p2x = &charstart[(p1prev < leftmargin | |
3730 | ? leftmargin : p1prev) | |
3731 | - p1start]; | |
3732 | int *p2 = &charstart[(p1 < endp ? p1 : endp) - p1start]; | |
3733 | ||
3734 | *p2x++ = pos; | |
3735 | while (p2x < p2) | |
3736 | *p2x++ = -1; | |
3737 | } | |
1842fc1a RS |
3738 | #ifdef HAVE_FACES |
3739 | /* Draw the face of the newline character as extending all the | |
3740 | way to the end of the frame line. */ | |
3741 | if (current_face) | |
3742 | { | |
3743 | if (p1 < leftmargin) | |
3744 | p1 = leftmargin; | |
3745 | while (p1 < endp) | |
3746 | *p1++ = FAST_MAKE_GLYPH (' ', current_face) | rev_dir_bit; | |
3747 | } | |
3748 | #endif | |
545e04f6 | 3749 | |
68a37fa8 | 3750 | break; |
a2889657 JB |
3751 | } |
3752 | else if (c == '\t') | |
3753 | { | |
3754 | do | |
3755 | { | |
d2f84654 | 3756 | if (p1 >= leftmargin && p1 < endp) |
1c9241f5 | 3757 | *p1 = MAKE_GLYPH (f, ' ', current_face) | rev_dir_bit; |
a2889657 JB |
3758 | p1++; |
3759 | } | |
d2f84654 | 3760 | while ((p1 - leftmargin + taboffset + hscroll - (hscroll > 0)) |
a2889657 JB |
3761 | % tab_width); |
3762 | } | |
6e8290aa | 3763 | else if (c == Ctl ('M') && selective == -1) |
a2889657 | 3764 | { |
12adba34 RS |
3765 | int opoint = PT, opoint_byte = PT_BYTE; |
3766 | scan_newline (pos, pos_byte, ZV, ZV_BYTE, 1, 1); | |
3767 | pos = PT, pos_byte = PT_BYTE; | |
26a9b1f3 | 3768 | TEMP_SET_PT_BOTH (opoint, opoint_byte); |
12adba34 RS |
3769 | |
3770 | if (FETCH_BYTE (pos_byte - 1) == '\n') | |
3771 | pos--, pos_byte--; | |
a2889657 JB |
3772 | if (selective_rlen > 0) |
3773 | { | |
3774 | p1 += selective_rlen; | |
d2f84654 | 3775 | if (p1 - leftmargin > width) |
a2889657 | 3776 | p1 = endp; |
278feba9 | 3777 | copy_part_of_rope (f, p1prev, p1prev, invis_vector_contents, |
1c9241f5 | 3778 | (p1 - p1prev), current_face, rev_dir_bit); |
a2889657 | 3779 | } |
87485d6f | 3780 | #ifdef HAVE_FACES |
3c5c35c5 JB |
3781 | /* Draw the face of the newline character as extending all the |
3782 | way to the end of the frame line. */ | |
3783 | if (current_face) | |
1105ff20 KH |
3784 | { |
3785 | if (p1 < leftmargin) | |
3786 | p1 = leftmargin; | |
3787 | while (p1 < endp) | |
1c9241f5 | 3788 | *p1++ = FAST_MAKE_GLYPH (' ', current_face) | rev_dir_bit; |
1105ff20 | 3789 | } |
3c5c35c5 | 3790 | #endif |
545e04f6 KH |
3791 | |
3792 | /* Update charstarts for the ^M that ended this line. */ | |
3793 | /* Do nothing here for a char that's entirely off the left edge | |
3794 | or if it starts at the right edge. */ | |
3795 | if (p1 >= leftmargin && p1prev != endp) | |
3796 | { | |
3797 | /* Store the newline's position into charstarts | |
3798 | for the column where the newline starts. | |
3799 | Store -1 for the rest of the glyphs it occupies. */ | |
3800 | int *p2x = &charstart[(p1prev < leftmargin | |
3801 | ? leftmargin : p1prev) | |
3802 | - p1start]; | |
3803 | int *p2 = &charstart[(p1 < endp ? p1 : endp) - p1start]; | |
3804 | ||
3805 | *p2x++ = pos; | |
3806 | while (p2x < p2) | |
3807 | *p2x++ = -1; | |
3808 | } | |
68a37fa8 | 3809 | break; |
a2889657 | 3810 | } |
a2889657 JB |
3811 | else if (c < 0200 && ctl_arrow) |
3812 | { | |
d2f84654 | 3813 | if (p1 >= leftmargin) |
e57bca5d KH |
3814 | *p1 = (fix_glyph |
3815 | (f, (dp && INTEGERP (DISP_CTRL_GLYPH (dp)) | |
3816 | && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (dp))) | |
3817 | ? XINT (DISP_CTRL_GLYPH (dp)) : '^'), | |
3818 | current_face) | |
1c9241f5 | 3819 | | rev_dir_bit); |
a2889657 | 3820 | p1++; |
d2f84654 | 3821 | if (p1 >= leftmargin && p1 < endp) |
1c9241f5 | 3822 | *p1 = MAKE_GLYPH (f, c ^ 0100, current_face) | rev_dir_bit; |
a2889657 JB |
3823 | p1++; |
3824 | } | |
1c9241f5 KH |
3825 | else |
3826 | { | |
a2c983d5 | 3827 | /* C is a multibyte character or a character to be displayed |
94487c4e | 3828 | by octal form. */ |
a2c983d5 | 3829 | int remaining_bytes = len; |
1c9241f5 | 3830 | |
7bbe686f AI |
3831 | if (unibyte_display_via_language_environment |
3832 | && SINGLE_BYTE_CHAR_P (c) | |
3833 | && (c >= 0240 | |
3834 | || (c >= 0200 && !NILP (Vnonascii_translation_table)))) | |
3835 | c = unibyte_char_to_multibyte (c); | |
3836 | ||
a688bb24 | 3837 | if (c >= 0400 && CHAR_VALID_P (c, 0)) |
1c9241f5 | 3838 | { |
a2c983d5 KH |
3839 | /* C is a multibyte character. */ |
3840 | int charset = CHAR_CHARSET (c); | |
3841 | int columns = (charset == CHARSET_COMPOSITION | |
3842 | ? cmpchar_table[COMPOSITE_CHAR_ID (c)]->width | |
3843 | : CHARSET_WIDTH (charset)); | |
3844 | GLYPH g = MAKE_GLYPH (f, c, current_face) | rev_dir_bit; | |
3845 | ||
3846 | while (columns--) | |
3847 | { | |
3848 | if (p1 >= leftmargin && p1 < endp) | |
3849 | *p1 = g, g |= GLYPH_MASK_PADDING; | |
3850 | p1++; | |
3851 | } | |
3852 | p1_wide_column_end = p1; | |
3853 | remaining_bytes -= CHARSET_BYTES (charset); | |
1c9241f5 | 3854 | } |
0d09d1e6 | 3855 | |
a2c983d5 | 3856 | while (remaining_bytes > 0) |
0d09d1e6 | 3857 | { |
a2c983d5 KH |
3858 | c = *(p - remaining_bytes--); |
3859 | ||
3860 | if (p1 >= leftmargin && p1 < endp) | |
3861 | *p1 = (fix_glyph | |
3862 | (f, | |
3863 | (dp && INTEGERP (DISP_ESCAPE_GLYPH (dp)) | |
3864 | && GLYPH_CHAR_VALID_P (XINT (DISP_ESCAPE_GLYPH (dp))) | |
3865 | ? XINT (DISP_ESCAPE_GLYPH (dp)) : '\\'), | |
3866 | current_face) | |
3867 | | rev_dir_bit); | |
3868 | p1++; | |
3869 | if (p1 >= leftmargin && p1 < endp) | |
3870 | *p1 = (MAKE_GLYPH (f, (c >> 6) + '0', current_face) | |
3871 | | rev_dir_bit); | |
3872 | p1++; | |
3873 | if (p1 >= leftmargin && p1 < endp) | |
3874 | *p1 = (MAKE_GLYPH (f, (7 & (c >> 3)) + '0', current_face) | |
3875 | | rev_dir_bit); | |
3876 | p1++; | |
3877 | if (p1 >= leftmargin && p1 < endp) | |
3878 | *p1 = (MAKE_GLYPH (f, (7 & c) + '0', current_face) | |
3879 | | rev_dir_bit); | |
3880 | p1++; | |
0d09d1e6 | 3881 | } |
1c9241f5 | 3882 | } |
31b24551 | 3883 | |
ca26e1c8 | 3884 | prevpos = pos; |
12adba34 RS |
3885 | prevpos_byte = pos_byte; |
3886 | pos++; | |
3887 | pos_byte += len; | |
545e04f6 KH |
3888 | |
3889 | /* Update charstarts for the character just output. */ | |
3890 | ||
3891 | /* Do nothing here for a char that's entirely off the left edge. */ | |
3892 | if (p1 >= leftmargin) | |
3893 | { | |
3894 | /* Store the char's position into charstarts | |
3895 | for the first glyph occupied by this char. | |
3896 | Store -1 for the rest of the glyphs it occupies. */ | |
3897 | if (p1 != p1prev) | |
3898 | { | |
3899 | int *p2x = &charstart[(p1prev < leftmargin | |
3900 | ? leftmargin : p1prev) | |
3901 | - p1start]; | |
3902 | int *p2 = &charstart[(p1 < endp ? p1 : endp) - p1start]; | |
3903 | ||
3904 | if (p2x < p2) | |
3905 | *p2x++ = prevpos; | |
3906 | while (p2x < p2) | |
3907 | *p2x++ = -1; | |
3908 | } | |
3909 | } | |
a2889657 JB |
3910 | } |
3911 | ||
3912 | val.hpos = - XINT (w->hscroll); | |
3913 | if (val.hpos) | |
3914 | val.hpos++; | |
3915 | ||
3916 | val.vpos = 1; | |
3917 | ||
3918 | lastpos = pos; | |
12adba34 | 3919 | lastpos_byte = pos_byte; |
a2889657 | 3920 | |
efc63ef0 RS |
3921 | /* Store 0 in this charstart line for the positions where |
3922 | there is no character. But do leave what was recorded | |
3923 | for the character that ended the line. */ | |
85bcef6c RS |
3924 | /* Add 1 in the endtest to compensate for the fact that ENDP was |
3925 | made from WIDTH, which is 1 less than the window's actual | |
3926 | internal width. */ | |
a007eef6 RS |
3927 | i = p1 - p1start + 1; |
3928 | if (p1 < leftmargin) | |
3929 | i += leftmargin - p1; | |
3930 | for (; i < endp - p1start + 1; i++) | |
efc63ef0 RS |
3931 | charstart[i] = 0; |
3932 | ||
a2889657 JB |
3933 | /* Handle continuation in middle of a character */ |
3934 | /* by backing up over it */ | |
3935 | if (p1 > endp) | |
3936 | { | |
5fcbb24d JB |
3937 | /* Don't back up if we never actually displayed any text. |
3938 | This occurs when the minibuffer prompt takes up the whole line. */ | |
3939 | if (p1prev) | |
3940 | { | |
1c9241f5 KH |
3941 | /* Start the next line with that same character whose |
3942 | character code is C and the length of multi-byte form is | |
3943 | LEN. */ | |
3944 | pos = prevpos; | |
12adba34 | 3945 | pos_byte = prevpos_byte; |
1c9241f5 | 3946 | |
0d09d1e6 KH |
3947 | if (p1_wide_column_end < endp) |
3948 | /* As ENDP is not in the middle of wide-column character, | |
3949 | we can break the line at ENDP and start from the middle | |
3950 | column in the next line. So, adjust VAL.HPOS to skip | |
3951 | the columns output on this line. */ | |
1c9241f5 KH |
3952 | val.hpos += p1prev - endp; |
3953 | else | |
3954 | { | |
0d09d1e6 KH |
3955 | /* We displayed a wide-column character at around ENDP. |
3956 | Since we can't broke it in the middle, the whole | |
3957 | character should be driven into the next line. */ | |
1c9241f5 KH |
3958 | /* As the result, the actual columns occupied by the |
3959 | text on this line is less than WIDTH. VAL.TAB_OFFSET | |
3960 | must be adjusted. */ | |
3961 | taboffset = taboffset + (p1prev - endp); | |
3962 | /* Let's fill unused columns with TRUNCATOR or CONTINUER. */ | |
3963 | { | |
3964 | GLYPH g = fix_glyph (f, truncate ? truncator : continuer, 0); | |
3965 | while (p1prev < endp) | |
3966 | *p1prev++ = g; | |
3967 | } | |
3968 | /* If POINT is at POS, cursor should not on this line. */ | |
3969 | lastpos = pos; | |
12adba34 | 3970 | lastpos_byte = pos_byte; |
1c9241f5 KH |
3971 | if (PT == pos) |
3972 | cursor_vpos = -1; | |
3973 | } | |
5fcbb24d JB |
3974 | } |
3975 | ||
a2889657 JB |
3976 | /* Keep in this line everything up to the continuation column. */ |
3977 | p1 = endp; | |
3978 | } | |
3979 | ||
3980 | /* Finish deciding which character to start the next line on, | |
3981 | and what hpos to start it at. | |
3982 | Also set `lastpos' to the last position which counts as "on this line" | |
3983 | for cursor-positioning. */ | |
3984 | ||
3985 | if (pos < ZV) | |
3986 | { | |
12adba34 | 3987 | if (FETCH_BYTE (pos_byte) == '\n') |
dd5f6267 | 3988 | { |
12adba34 RS |
3989 | int opoint = PT, opoint_byte = PT_BYTE; |
3990 | ||
dd5f6267 | 3991 | /* If stopped due to a newline, start next line after it */ |
26a9b1f3 | 3992 | TEMP_SET_PT_BOTH (pos + 1, pos_byte + 1); |
12adba34 | 3993 | |
1c9241f5 | 3994 | val.tab_offset = 0; |
dd5f6267 KH |
3995 | /* Check again for hidden lines, in case the newline occurred exactly |
3996 | at the right margin. */ | |
12adba34 RS |
3997 | while (PT < ZV && selective > 0 |
3998 | && indented_beyond_p (PT, PT_BYTE, selective)) | |
3999 | scan_newline (PT, PT_BYTE, ZV, ZV_BYTE, 1, 1); | |
4000 | ||
4001 | pos = PT, pos_byte = PT_BYTE; | |
26a9b1f3 | 4002 | TEMP_SET_PT_BOTH (opoint, opoint_byte); |
dd5f6267 | 4003 | } |
a2889657 JB |
4004 | else |
4005 | /* Stopped due to right margin of window */ | |
4006 | { | |
4007 | if (truncate) | |
4008 | { | |
12adba34 RS |
4009 | int opoint = PT, opoint_byte = PT_BYTE; |
4010 | ||
26a9b1f3 | 4011 | TEMP_SET_PT_BOTH (pos, pos_byte); |
278feba9 | 4012 | *p1++ = fix_glyph (f, truncator, 0); |
a2889657 JB |
4013 | /* Truncating => start next line after next newline, |
4014 | and point is on this line if it is before the newline, | |
4015 | and skip none of first char of next line */ | |
dd5f6267 | 4016 | do |
12adba34 RS |
4017 | scan_newline (PT, PT_BYTE, ZV, ZV_BYTE, 1, 1); |
4018 | while (PT < ZV && selective > 0 | |
4019 | && indented_beyond_p (PT, PT_BYTE, selective)); | |
4020 | pos = PT, pos_byte = PT_BYTE; | |
a2889657 | 4021 | val.hpos = XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0; |
26a9b1f3 | 4022 | TEMP_SET_PT_BOTH (opoint, opoint_byte); |
a2889657 | 4023 | |
12adba34 RS |
4024 | lastpos = pos - (FETCH_BYTE (pos_byte - 1) == '\n'); |
4025 | lastpos_byte = CHAR_TO_BYTE (lastpos); | |
1c9241f5 | 4026 | val.tab_offset = 0; |
a2889657 JB |
4027 | } |
4028 | else | |
4029 | { | |
278feba9 | 4030 | *p1++ = fix_glyph (f, continuer, 0); |
a2889657 | 4031 | val.vpos = 0; |
93fdf93b | 4032 | DEC_BOTH (lastpos, lastpos_byte); |
1c9241f5 | 4033 | val.tab_offset = taboffset + width; |
a2889657 JB |
4034 | } |
4035 | } | |
4036 | } | |
1c9241f5 KH |
4037 | else |
4038 | val.tab_offset = 0; | |
a2889657 JB |
4039 | |
4040 | /* If point is at eol or in invisible text at eol, | |
44fa5b1e | 4041 | record its frame location now. */ |
a2889657 | 4042 | |
ae3b1442 | 4043 | if (start <= PT && PT <= lastpos && cursor_vpos < 0) |
a2889657 JB |
4044 | { |
4045 | cursor_vpos = vpos; | |
d2f84654 | 4046 | cursor_hpos = p1 - leftmargin; |
a2889657 JB |
4047 | } |
4048 | ||
4049 | if (cursor_vpos == vpos) | |
4050 | { | |
4051 | if (cursor_hpos < 0) cursor_hpos = 0; | |
4052 | if (cursor_hpos > width) cursor_hpos = width; | |
73f194f1 | 4053 | cursor_hpos += WINDOW_LEFT_MARGIN (w); |
44fa5b1e | 4054 | if (w == XWINDOW (FRAME_SELECTED_WINDOW (f))) |
a2889657 | 4055 | { |
5936754e RS |
4056 | this_line_bufpos = 0; |
4057 | ||
4058 | /* If this frame's cursor will be in its echo area, | |
4059 | don't record a cursor from the window text, | |
4060 | and turn off the optimization for cursor-motion-only case. */ | |
b5bbc9a5 KH |
4061 | if (!(cursor_in_echo_area && FRAME_HAS_MINIBUF_P (f) |
4062 | && EQ (FRAME_MINIBUF_WINDOW (f), minibuf_window))) | |
4063 | { | |
4064 | FRAME_CURSOR_Y (f) = cursor_vpos; | |
4065 | FRAME_CURSOR_X (f) = cursor_hpos; | |
a2889657 | 4066 | |
5936754e | 4067 | if (w == XWINDOW (selected_window)) |
a2889657 | 4068 | { |
5936754e RS |
4069 | /* Line is not continued and did not start |
4070 | in middle of character */ | |
4071 | if ((hpos - WINDOW_LEFT_MARGIN (w) | |
4072 | == (XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0)) | |
4073 | && val.vpos) | |
4074 | { | |
4075 | this_line_bufpos = start; | |
4076 | this_line_buffer = current_buffer; | |
4077 | this_line_vpos = cursor_vpos; | |
4078 | this_line_start_hpos = hpos - WINDOW_LEFT_MARGIN (w); | |
4079 | this_line_endpos = Z - lastpos; | |
4080 | } | |
a2889657 | 4081 | } |
a2889657 JB |
4082 | } |
4083 | } | |
4084 | } | |
4085 | ||
4086 | /* If hscroll and line not empty, insert truncation-at-left marker */ | |
4087 | if (hscroll && lastpos != start) | |
4088 | { | |
1c9241f5 KH |
4089 | GLYPH g = fix_glyph (f, truncator, 0); |
4090 | *leftmargin = g; | |
d2f84654 RS |
4091 | if (p1 <= leftmargin) |
4092 | p1 = leftmargin + 1; | |
1c9241f5 KH |
4093 | else /* MULE: it may be a wide-column character */ |
4094 | { | |
4095 | p1prev = leftmargin + 1; | |
4096 | while (p1prev < p1 && *p1prev & GLYPH_MASK_PADDING) | |
4097 | *p1prev++ = g; | |
4098 | } | |
a2889657 JB |
4099 | } |
4100 | ||
73f194f1 | 4101 | if (!WINDOW_RIGHTMOST_P (w)) |
a2889657 JB |
4102 | { |
4103 | endp++; | |
d2f84654 | 4104 | if (p1 < leftmargin) p1 = leftmargin; |
a2889657 | 4105 | while (p1 < endp) *p1++ = SPACEGLYPH; |
b1d1124b | 4106 | |
88f22aff JB |
4107 | /* Don't draw vertical bars if we're using scroll bars. They're |
4108 | covered up by the scroll bars, and it's distracting to see | |
4109 | them when the scroll bar windows are flickering around to be | |
b1d1124b | 4110 | reconfigured. */ |
73f194f1 | 4111 | if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_RIGHT (f)) |
75d13c64 KH |
4112 | { |
4113 | int i; | |
4114 | for (i = 0; i < FRAME_SCROLL_BAR_COLS (f); i++) | |
4115 | *p1++ = SPACEGLYPH; | |
4116 | } | |
73f194f1 | 4117 | else if (!FRAME_HAS_VERTICAL_SCROLL_BARS (f)) |
75d13c64 | 4118 | *p1++ = (dp && INTEGERP (DISP_BORDER_GLYPH (dp)) |
8bb6ca14 | 4119 | ? XINT (DISP_BORDER_GLYPH (dp)) |
75d13c64 | 4120 | : '|'); |
a2889657 JB |
4121 | } |
4122 | desired_glyphs->used[vpos] = max (desired_glyphs->used[vpos], | |
4123 | p1 - desired_glyphs->glyphs[vpos]); | |
4124 | desired_glyphs->glyphs[vpos][desired_glyphs->used[vpos]] = 0; | |
4125 | ||
4126 | /* If the start of this line is the overlay arrow-position, | |
4127 | then put the arrow string into the display-line. */ | |
4128 | ||
e24c997d | 4129 | if (MARKERP (Voverlay_arrow_position) |
a2889657 JB |
4130 | && current_buffer == XMARKER (Voverlay_arrow_position)->buffer |
4131 | && start == marker_position (Voverlay_arrow_position) | |
e24c997d | 4132 | && STRINGP (Voverlay_arrow_string) |
a2889657 JB |
4133 | && ! overlay_arrow_seen) |
4134 | { | |
0a9dc68b | 4135 | int i, i_byte; |
a2889657 | 4136 | int len = XSTRING (Voverlay_arrow_string)->size; |
142be3dd | 4137 | int arrow_end; |
a2889657 | 4138 | |
b1d1124b JB |
4139 | if (len > width) |
4140 | len = width; | |
212e4f87 RS |
4141 | |
4142 | /* If the arrow string has text props, obey them when displaying. */ | |
4143 | for (i = 0, i_byte = 0; i < len; ) | |
c4628384 | 4144 | { |
212e4f87 RS |
4145 | int c; |
4146 | Lisp_Object face, ilisp; | |
4147 | int newface; | |
4148 | int idx = i; | |
c4628384 | 4149 | |
212e4f87 RS |
4150 | if (STRING_MULTIBYTE (Voverlay_arrow_string)) |
4151 | FETCH_STRING_CHAR_ADVANCE (c, Voverlay_arrow_string, i, i_byte); | |
4152 | else | |
4153 | c = XSTRING (Voverlay_arrow_string)->data[i++]; | |
0a9dc68b | 4154 | |
212e4f87 RS |
4155 | XSETFASTINT (ilisp, i); |
4156 | #ifdef HAVE_FACES | |
4157 | if (FRAME_WINDOW_P (f)) | |
4158 | { | |
c4628384 RS |
4159 | face = Fget_text_property (ilisp, Qface, Voverlay_arrow_string); |
4160 | newface = compute_glyph_face_1 (f, face, 0); | |
212e4f87 | 4161 | c = FAST_MAKE_GLYPH (c, newface); |
c4628384 | 4162 | } |
87485d6f | 4163 | #endif /* HAVE_FACES */ |
212e4f87 | 4164 | leftmargin[idx] = c; |
c4628384 | 4165 | } |
142be3dd JB |
4166 | |
4167 | /* Bug in SunOS 4.1.1 compiler requires this intermediate variable. */ | |
d2f84654 | 4168 | arrow_end = (leftmargin - desired_glyphs->glyphs[vpos]) + len; |
142be3dd JB |
4169 | if (desired_glyphs->used[vpos] < arrow_end) |
4170 | desired_glyphs->used[vpos] = arrow_end; | |
a2889657 JB |
4171 | |
4172 | overlay_arrow_seen = 1; | |
4173 | } | |
4174 | ||
4175 | val.bufpos = pos; | |
12adba34 | 4176 | val.bytepos = pos_byte; |
0f9c0ff0 | 4177 | val.ovstring_chars_done = ovstr_done; |
a2889657 JB |
4178 | val_display_text_line = val; |
4179 | return &val_display_text_line; | |
4180 | } | |
4181 | \f | |
7ce2c095 RS |
4182 | /* Redisplay the menu bar in the frame for window W. */ |
4183 | ||
4184 | static void | |
4185 | display_menu_bar (w) | |
4186 | struct window *w; | |
4187 | { | |
4188 | Lisp_Object items, tail; | |
4189 | register int vpos = 0; | |
4190 | register FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); | |
eeb4f710 | 4191 | int maxendcol = FRAME_WIDTH (f); |
7ce2c095 | 4192 | int hpos = 0; |
8351baf2 | 4193 | int i; |
7ce2c095 | 4194 | |
dc937613 | 4195 | #ifdef HAVE_NTGUI |
d129c4c2 KH |
4196 | if (!NILP (Vwindow_system)) |
4197 | return; | |
dc937613 RS |
4198 | #endif |
4199 | ||
4200 | #ifdef USE_X_TOOLKIT | |
d3413a53 | 4201 | if (FRAME_X_P (f)) |
7ce2c095 | 4202 | return; |
dc937613 | 4203 | #endif /* USE_X_TOOLKIT */ |
7ce2c095 RS |
4204 | |
4205 | get_display_line (f, vpos, 0); | |
4206 | ||
8351baf2 | 4207 | items = FRAME_MENU_BAR_ITEMS (f); |
469937ac | 4208 | for (i = 0; i < XVECTOR (items)->size; i += 4) |
7ce2c095 | 4209 | { |
8351baf2 RS |
4210 | Lisp_Object pos, string; |
4211 | string = XVECTOR (items)->contents[i + 1]; | |
4212 | if (NILP (string)) | |
4213 | break; | |
2d66ad19 | 4214 | |
469937ac | 4215 | XSETFASTINT (XVECTOR (items)->contents[i + 3], hpos); |
7ce2c095 RS |
4216 | |
4217 | if (hpos < maxendcol) | |
11c52c4f | 4218 | hpos = display_string (w, vpos, |
7ce2c095 | 4219 | XSTRING (string)->data, |
fc932ac6 | 4220 | STRING_BYTES (XSTRING (string)), |
0a9dc68b RS |
4221 | hpos, 0, 0, hpos, maxendcol, |
4222 | STRING_MULTIBYTE (string)); | |
6b1bbc46 | 4223 | /* Put a space between items. */ |
2d66ad19 RS |
4224 | if (hpos < maxendcol) |
4225 | { | |
6b1bbc46 | 4226 | int hpos1 = hpos + 1; |
278feba9 | 4227 | hpos = display_string (w, vpos, "", 0, hpos, 0, 0, |
a3788d53 | 4228 | min (hpos1, maxendcol), maxendcol, 0); |
2d66ad19 | 4229 | } |
7ce2c095 RS |
4230 | } |
4231 | ||
4232 | FRAME_DESIRED_GLYPHS (f)->bufp[vpos] = 0; | |
4233 | FRAME_DESIRED_GLYPHS (f)->highlight[vpos] = mode_line_inverse_video; | |
2d66ad19 RS |
4234 | |
4235 | /* Fill out the line with spaces. */ | |
4236 | if (maxendcol > hpos) | |
a3788d53 | 4237 | hpos = display_string (w, vpos, "", 0, hpos, 0, 0, maxendcol, maxendcol, 0); |
db6f348c JB |
4238 | |
4239 | /* Clear the rest of the lines allocated to the menu bar. */ | |
4240 | vpos++; | |
4241 | while (vpos < FRAME_MENU_BAR_LINES (f)) | |
4242 | get_display_line (f, vpos++, 0); | |
7ce2c095 RS |
4243 | } |
4244 | \f | |
a2889657 JB |
4245 | /* Display the mode line for window w */ |
4246 | ||
4247 | static void | |
4248 | display_mode_line (w) | |
4249 | struct window *w; | |
4250 | { | |
4251 | register int vpos = XFASTINT (w->height) + XFASTINT (w->top) - 1; | |
73f194f1 RS |
4252 | register int left = WINDOW_LEFT_MARGIN (w); |
4253 | register int right = WINDOW_RIGHT_MARGIN (w); | |
44fa5b1e | 4254 | register FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
a2889657 | 4255 | |
aa6d10fa | 4256 | line_number_displayed = 0; |
155ef550 | 4257 | w->column_number_displayed = Qnil; |
aa6d10fa | 4258 | |
44fa5b1e | 4259 | get_display_line (f, vpos, left); |
03b294dc RS |
4260 | |
4261 | /* Temporarily make frame F's kboard the current kboard | |
4262 | so that kboard-local variables in the mode_line_format | |
4263 | will get the right values. */ | |
4264 | push_frame_kboard (f); | |
4265 | ||
4266 | display_mode_element (w, vpos, left, 0, right, right, | |
4267 | current_buffer->mode_line_format); | |
4268 | ||
4269 | pop_frame_kboard (); | |
4270 | ||
44fa5b1e | 4271 | FRAME_DESIRED_GLYPHS (f)->bufp[vpos] = 0; |
a2889657 | 4272 | |
73f194f1 RS |
4273 | /* Put the mode line in inverse video. |
4274 | Use faces if possible, since that lets us handle | |
4275 | partial-width windows and avoid inverting the scroll bar columns. */ | |
87485d6f | 4276 | #ifdef HAVE_FACES |
73f194f1 | 4277 | if (! FRAME_TERMCAP_P (f) && mode_line_inverse_video) |
d7eb09a0 RS |
4278 | { |
4279 | /* For a partial width window, explicitly set face of each glyph. */ | |
4280 | int i; | |
1c9241f5 | 4281 | unsigned int padding; |
d7eb09a0 RS |
4282 | GLYPH *ptr = FRAME_DESIRED_GLYPHS (f)->glyphs[vpos]; |
4283 | for (i = left; i < right; ++i) | |
1c9241f5 KH |
4284 | { |
4285 | padding = ptr[i] & GLYPH_MASK_PADDING; | |
4286 | ptr[i] = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (ptr[i]), 1) | padding; | |
4287 | } | |
d7eb09a0 | 4288 | } |
010a899e | 4289 | else |
4cdc65eb | 4290 | #endif |
73f194f1 RS |
4291 | |
4292 | /* Make the mode line inverse video if the entire line | |
4293 | is made of mode lines. | |
4294 | I.e. if this window is full width, | |
4295 | or if it is the child of a full width window | |
4296 | (which implies that that window is split side-by-side | |
4297 | and the rest of this line is mode lines of the sibling windows). */ | |
010a899e KH |
4298 | if (WINDOW_FULL_WIDTH_P (w) |
4299 | || WINDOW_FULL_WIDTH_P (XWINDOW (w->parent))) | |
73f194f1 | 4300 | FRAME_DESIRED_GLYPHS (f)->highlight[vpos] = mode_line_inverse_video; |
a2889657 JB |
4301 | } |
4302 | ||
4303 | /* Contribute ELT to the mode line for window W. | |
4304 | How it translates into text depends on its data type. | |
4305 | ||
4306 | VPOS is the position of the mode line being displayed. | |
4307 | ||
44fa5b1e | 4308 | HPOS is the position (absolute on frame) where this element's text |
a2889657 JB |
4309 | should start. The output is truncated automatically at the right |
4310 | edge of window W. | |
4311 | ||
4312 | DEPTH is the depth in recursion. It is used to prevent | |
4313 | infinite recursion here. | |
4314 | ||
4315 | MINENDCOL is the hpos before which the element may not end. | |
4316 | The element is padded at the right with spaces if nec | |
4317 | to reach this column. | |
4318 | ||
4319 | MAXENDCOL is the hpos past which this element may not extend. | |
4320 | If MINENDCOL is > MAXENDCOL, MINENDCOL takes priority. | |
4321 | (This is necessary to make nested padding and truncation work.) | |
4322 | ||
4323 | Returns the hpos of the end of the text generated by ELT. | |
4324 | The next element will receive that value as its HPOS arg, | |
4325 | so as to concatenate the elements. */ | |
4326 | ||
4327 | static int | |
4328 | display_mode_element (w, vpos, hpos, depth, minendcol, maxendcol, elt) | |
4329 | struct window *w; | |
4330 | register int vpos, hpos; | |
4331 | int depth; | |
4332 | int minendcol; | |
4333 | register int maxendcol; | |
4334 | register Lisp_Object elt; | |
4335 | { | |
4336 | tail_recurse: | |
4337 | if (depth > 10) | |
4338 | goto invalid; | |
4339 | ||
4340 | depth++; | |
4341 | ||
0220c518 | 4342 | switch (SWITCH_ENUM_CAST (XTYPE (elt))) |
a2889657 JB |
4343 | { |
4344 | case Lisp_String: | |
4345 | { | |
4346 | /* A string: output it and check for %-constructs within it. */ | |
4347 | register unsigned char c; | |
4348 | register unsigned char *this = XSTRING (elt)->data; | |
4349 | ||
4350 | while (hpos < maxendcol && *this) | |
4351 | { | |
4352 | unsigned char *last = this; | |
4353 | while ((c = *this++) != '\0' && c != '%') | |
4354 | ; | |
4355 | if (this - 1 != last) | |
4356 | { | |
4357 | register int lim = --this - last + hpos; | |
d39b6696 KH |
4358 | if (frame_title_ptr) |
4359 | hpos = store_frame_title (last, hpos, min (lim, maxendcol)); | |
4360 | else | |
4361 | hpos = display_string (w, vpos, last, -1, hpos, 0, 1, | |
0a9dc68b RS |
4362 | hpos, min (lim, maxendcol), |
4363 | STRING_MULTIBYTE (elt)); | |
a2889657 JB |
4364 | } |
4365 | else /* c == '%' */ | |
4366 | { | |
766525bc | 4367 | register int minendcol; |
a2889657 JB |
4368 | register int spec_width = 0; |
4369 | ||
4370 | /* We can't allow -ve args due to the "%-" construct */ | |
4371 | /* Argument specifies minwidth but not maxwidth | |
4372 | (maxwidth can be specified by | |
4373 | (<negative-number> . <stuff>) mode-line elements) */ | |
4374 | ||
4375 | while ((c = *this++) >= '0' && c <= '9') | |
4376 | { | |
4377 | spec_width = spec_width * 10 + (c - '0'); | |
4378 | } | |
4379 | ||
766525bc RS |
4380 | minendcol = hpos + spec_width; |
4381 | if (minendcol > maxendcol) | |
4382 | { | |
4383 | spec_width = maxendcol - hpos; | |
4384 | minendcol = maxendcol; | |
4385 | } | |
a2889657 JB |
4386 | |
4387 | if (c == 'M') | |
4388 | hpos = display_mode_element (w, vpos, hpos, depth, | |
4389 | spec_width, maxendcol, | |
4390 | Vglobal_mode_string); | |
4391 | else if (c != 0) | |
d39b6696 | 4392 | { |
766525bc RS |
4393 | char *spec = decode_mode_spec (w, c, spec_width, |
4394 | maxendcol - hpos); | |
d39b6696 | 4395 | if (frame_title_ptr) |
766525bc | 4396 | hpos = store_frame_title (spec, minendcol, maxendcol); |
d39b6696 KH |
4397 | else |
4398 | hpos = display_string (w, vpos, spec, -1, | |
4399 | hpos, 0, 1, | |
a3788d53 | 4400 | minendcol, maxendcol, -1); |
d39b6696 | 4401 | } |
a2889657 JB |
4402 | } |
4403 | } | |
4404 | } | |
4405 | break; | |
4406 | ||
4407 | case Lisp_Symbol: | |
4408 | /* A symbol: process the value of the symbol recursively | |
4409 | as if it appeared here directly. Avoid error if symbol void. | |
4410 | Special case: if value of symbol is a string, output the string | |
4411 | literally. */ | |
4412 | { | |
4413 | register Lisp_Object tem; | |
4414 | tem = Fboundp (elt); | |
265a9e55 | 4415 | if (!NILP (tem)) |
a2889657 JB |
4416 | { |
4417 | tem = Fsymbol_value (elt); | |
4418 | /* If value is a string, output that string literally: | |
4419 | don't check for % within it. */ | |
e24c997d | 4420 | if (STRINGP (tem)) |
d39b6696 KH |
4421 | { |
4422 | if (frame_title_ptr) | |
4423 | hpos = store_frame_title (XSTRING (tem)->data, | |
4424 | minendcol, maxendcol); | |
4425 | else | |
4426 | hpos = display_string (w, vpos, XSTRING (tem)->data, | |
fc932ac6 | 4427 | STRING_BYTES (XSTRING (tem)), |
0a9dc68b RS |
4428 | hpos, 0, 1, minendcol, maxendcol, |
4429 | STRING_MULTIBYTE (tem)); | |
d39b6696 | 4430 | } |
a2889657 JB |
4431 | /* Give up right away for nil or t. */ |
4432 | else if (!EQ (tem, elt)) | |
4433 | { elt = tem; goto tail_recurse; } | |
4434 | } | |
4435 | } | |
4436 | break; | |
4437 | ||
4438 | case Lisp_Cons: | |
4439 | { | |
4440 | register Lisp_Object car, tem; | |
4441 | ||
4442 | /* A cons cell: three distinct cases. | |
4443 | If first element is a string or a cons, process all the elements | |
4444 | and effectively concatenate them. | |
4445 | If first element is a negative number, truncate displaying cdr to | |
4446 | at most that many characters. If positive, pad (with spaces) | |
4447 | to at least that many characters. | |
4448 | If first element is a symbol, process the cadr or caddr recursively | |
4449 | according to whether the symbol's value is non-nil or nil. */ | |
4450 | car = XCONS (elt)->car; | |
e24c997d | 4451 | if (SYMBOLP (car)) |
a2889657 JB |
4452 | { |
4453 | tem = Fboundp (car); | |
4454 | elt = XCONS (elt)->cdr; | |
e24c997d | 4455 | if (!CONSP (elt)) |
a2889657 JB |
4456 | goto invalid; |
4457 | /* elt is now the cdr, and we know it is a cons cell. | |
4458 | Use its car if CAR has a non-nil value. */ | |
265a9e55 | 4459 | if (!NILP (tem)) |
a2889657 JB |
4460 | { |
4461 | tem = Fsymbol_value (car); | |
265a9e55 | 4462 | if (!NILP (tem)) |
a2889657 JB |
4463 | { elt = XCONS (elt)->car; goto tail_recurse; } |
4464 | } | |
4465 | /* Symbol's value is nil (or symbol is unbound) | |
4466 | Get the cddr of the original list | |
4467 | and if possible find the caddr and use that. */ | |
4468 | elt = XCONS (elt)->cdr; | |
265a9e55 | 4469 | if (NILP (elt)) |
a2889657 | 4470 | break; |
e24c997d | 4471 | else if (!CONSP (elt)) |
a2889657 JB |
4472 | goto invalid; |
4473 | elt = XCONS (elt)->car; | |
4474 | goto tail_recurse; | |
4475 | } | |
e24c997d | 4476 | else if (INTEGERP (car)) |
a2889657 JB |
4477 | { |
4478 | register int lim = XINT (car); | |
4479 | elt = XCONS (elt)->cdr; | |
4480 | if (lim < 0) | |
4481 | /* Negative int means reduce maximum width. | |
4482 | DO NOT change MINENDCOL here! | |
4483 | (20 -10 . foo) should truncate foo to 10 col | |
4484 | and then pad to 20. */ | |
4485 | maxendcol = min (maxendcol, hpos - lim); | |
4486 | else if (lim > 0) | |
4487 | { | |
4488 | /* Padding specified. Don't let it be more than | |
4489 | current maximum. */ | |
4490 | lim += hpos; | |
4491 | if (lim > maxendcol) | |
4492 | lim = maxendcol; | |
4493 | /* If that's more padding than already wanted, queue it. | |
4494 | But don't reduce padding already specified even if | |
4495 | that is beyond the current truncation point. */ | |
4496 | if (lim > minendcol) | |
4497 | minendcol = lim; | |
4498 | } | |
4499 | goto tail_recurse; | |
4500 | } | |
e24c997d | 4501 | else if (STRINGP (car) || CONSP (car)) |
a2889657 JB |
4502 | { |
4503 | register int limit = 50; | |
4504 | /* LIMIT is to protect against circular lists. */ | |
e24c997d | 4505 | while (CONSP (elt) && --limit > 0 |
a2889657 JB |
4506 | && hpos < maxendcol) |
4507 | { | |
4508 | hpos = display_mode_element (w, vpos, hpos, depth, | |
4509 | hpos, maxendcol, | |
4510 | XCONS (elt)->car); | |
4511 | elt = XCONS (elt)->cdr; | |
4512 | } | |
4513 | } | |
4514 | } | |
4515 | break; | |
4516 | ||
4517 | default: | |
4518 | invalid: | |
d39b6696 KH |
4519 | if (frame_title_ptr) |
4520 | hpos = store_frame_title ("*invalid*", minendcol, maxendcol); | |
4521 | else | |
4522 | hpos = display_string (w, vpos, "*invalid*", -1, hpos, 0, 1, | |
a3788d53 | 4523 | minendcol, maxendcol, 0); |
d39b6696 | 4524 | return hpos; |
a2889657 JB |
4525 | } |
4526 | ||
a2889657 | 4527 | if (minendcol > hpos) |
d39b6696 KH |
4528 | if (frame_title_ptr) |
4529 | hpos = store_frame_title ("", minendcol, maxendcol); | |
4530 | else | |
a3788d53 RS |
4531 | hpos = display_string (w, vpos, "", 0, hpos, |
4532 | 0, 1, minendcol, maxendcol, 0); | |
a2889657 JB |
4533 | return hpos; |
4534 | } | |
4535 | \f | |
766525bc RS |
4536 | /* Write a null-terminated, right justified decimal representation of |
4537 | the positive integer D to BUF using a minimal field width WIDTH. */ | |
4538 | ||
4539 | static void | |
4540 | pint2str (buf, width, d) | |
4541 | register char *buf; | |
4542 | register int width; | |
4543 | register int d; | |
4544 | { | |
4545 | register char *p = buf; | |
4546 | ||
4547 | if (d <= 0) | |
4548 | *p++ = '0'; | |
4549 | else | |
4550 | while (d > 0) | |
4551 | { | |
4552 | *p++ = d % 10 + '0'; | |
4553 | d /= 10; | |
4554 | } | |
4555 | for (width -= (int) (p - buf); width > 0; --width) *p++ = ' '; | |
4556 | *p-- = '\0'; | |
4557 | while (p > buf) | |
4558 | { | |
4559 | d = *buf; | |
4560 | *buf++ = *p; | |
4561 | *p-- = d; | |
4562 | } | |
4563 | } | |
4564 | ||
1c9241f5 KH |
4565 | /* Set a mnemonic character for CODING_SYSTEM (Lisp symbol) in BUF. |
4566 | If EOL_FLAG is 1, set also a mnemonic character for end-of-line | |
4567 | type of CODING_SYSTEM. Return updated pointer into BUF. */ | |
4568 | ||
6693a99a | 4569 | static unsigned char invalid_eol_type[] = "(*invalid*)"; |
d24715e8 | 4570 | |
1c9241f5 KH |
4571 | static char * |
4572 | decode_mode_spec_coding (coding_system, buf, eol_flag) | |
4573 | Lisp_Object coding_system; | |
4574 | register char *buf; | |
4575 | int eol_flag; | |
4576 | { | |
1e1078d6 | 4577 | Lisp_Object val; |
916848d8 | 4578 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
302f2b38 EZ |
4579 | unsigned char *eol_str; |
4580 | int eol_str_len; | |
4581 | /* The EOL conversion we are using. */ | |
4582 | Lisp_Object eoltype; | |
1e1078d6 RS |
4583 | |
4584 | val = coding_system; | |
1c9241f5 KH |
4585 | |
4586 | if (NILP (val)) /* Not yet decided. */ | |
4587 | { | |
916848d8 RS |
4588 | if (multibyte) |
4589 | *buf++ = '-'; | |
21e989e3 | 4590 | if (eol_flag) |
302f2b38 | 4591 | eoltype = eol_mnemonic_undecided; |
1e1078d6 | 4592 | /* Don't mention EOL conversion if it isn't decided. */ |
1c9241f5 KH |
4593 | } |
4594 | else | |
4595 | { | |
1e1078d6 RS |
4596 | Lisp_Object eolvalue; |
4597 | ||
4598 | eolvalue = Fget (coding_system, Qeol_type); | |
4599 | ||
1c9241f5 | 4600 | while (!NILP (val) && SYMBOLP (val)) |
1e1078d6 RS |
4601 | { |
4602 | val = Fget (val, Qcoding_system); | |
4603 | if (NILP (eolvalue)) | |
b070c1d7 | 4604 | eolvalue = Fget (val, Qeol_type); |
1e1078d6 RS |
4605 | } |
4606 | ||
916848d8 RS |
4607 | if (multibyte) |
4608 | *buf++ = XFASTINT (XVECTOR (val)->contents[1]); | |
4609 | ||
1c9241f5 KH |
4610 | if (eol_flag) |
4611 | { | |
1e1078d6 RS |
4612 | /* The EOL conversion that is normal on this system. */ |
4613 | ||
4614 | if (NILP (eolvalue)) /* Not yet decided. */ | |
4615 | eoltype = eol_mnemonic_undecided; | |
4616 | else if (VECTORP (eolvalue)) /* Not yet decided. */ | |
4617 | eoltype = eol_mnemonic_undecided; | |
4618 | else /* INTEGERP (eolvalue) -- 0:LF, 1:CRLF, 2:CR */ | |
4619 | eoltype = (XFASTINT (eolvalue) == 0 | |
4620 | ? eol_mnemonic_unix | |
4621 | : (XFASTINT (eolvalue) == 1 | |
4622 | ? eol_mnemonic_dos : eol_mnemonic_mac)); | |
302f2b38 EZ |
4623 | } |
4624 | } | |
1e1078d6 | 4625 | |
302f2b38 EZ |
4626 | if (eol_flag) |
4627 | { | |
4628 | /* Mention the EOL conversion if it is not the usual one. */ | |
4629 | if (STRINGP (eoltype)) | |
4630 | { | |
4631 | eol_str = XSTRING (eoltype)->data; | |
4632 | eol_str_len = XSTRING (eoltype)->size; | |
4633 | } | |
f30b3499 KH |
4634 | else if (INTEGERP (eoltype) |
4635 | && CHAR_VALID_P (XINT (eoltype), 0)) | |
4636 | { | |
4637 | int c = XINT (eoltype); | |
4638 | unsigned char work[4]; | |
4639 | ||
4640 | eol_str_len = CHAR_STRING (XINT (eoltype), work, eol_str); | |
4641 | } | |
302f2b38 EZ |
4642 | else |
4643 | { | |
4644 | eol_str = invalid_eol_type; | |
4645 | eol_str_len = sizeof (invalid_eol_type) - 1; | |
1c9241f5 | 4646 | } |
f30b3499 | 4647 | bcopy (eol_str, buf, eol_str_len); |
302f2b38 | 4648 | buf += eol_str_len; |
1c9241f5 | 4649 | } |
302f2b38 | 4650 | |
1c9241f5 KH |
4651 | return buf; |
4652 | } | |
4653 | ||
a2889657 | 4654 | /* Return a string for the output of a mode line %-spec for window W, |
766525bc RS |
4655 | generated by character C. SPEC_WIDTH is the field width when |
4656 | padding to the left (%c, %l). The value returned from this | |
4657 | function will later be truncated to width MAXWIDTH. */ | |
a2889657 | 4658 | |
11e82b76 JB |
4659 | static char lots_of_dashes[] = "--------------------------------------------------------------------------------------------------------------------------------------------"; |
4660 | ||
a2889657 | 4661 | static char * |
766525bc | 4662 | decode_mode_spec (w, c, spec_width, maxwidth) |
a2889657 JB |
4663 | struct window *w; |
4664 | register char c; | |
766525bc | 4665 | register int spec_width; |
a2889657 JB |
4666 | register int maxwidth; |
4667 | { | |
0b67772d | 4668 | Lisp_Object obj; |
44fa5b1e JB |
4669 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
4670 | char *decode_mode_spec_buf = (char *) FRAME_TEMP_GLYPHS (f)->total_contents; | |
d39b6696 | 4671 | struct buffer *b = XBUFFER (w->buffer); |
a2889657 | 4672 | |
0b67772d | 4673 | obj = Qnil; |
44fa5b1e JB |
4674 | if (maxwidth > FRAME_WIDTH (f)) |
4675 | maxwidth = FRAME_WIDTH (f); | |
a2889657 JB |
4676 | |
4677 | switch (c) | |
4678 | { | |
1af9f229 RS |
4679 | case '*': |
4680 | if (!NILP (b->read_only)) | |
4681 | return "%"; | |
4682 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
4683 | return "*"; | |
4684 | return "-"; | |
4685 | ||
4686 | case '+': | |
4687 | /* This differs from %* only for a modified read-only buffer. */ | |
4688 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
4689 | return "*"; | |
4690 | if (!NILP (b->read_only)) | |
4691 | return "%"; | |
4692 | return "-"; | |
4693 | ||
4694 | case '&': | |
4695 | /* This differs from %* in ignoring read-only-ness. */ | |
4696 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
4697 | return "*"; | |
4698 | return "-"; | |
4699 | ||
4700 | case '%': | |
4701 | return "%"; | |
4702 | ||
4703 | case '[': | |
4704 | { | |
4705 | int i; | |
4706 | char *p; | |
4707 | ||
4708 | if (command_loop_level > 5) | |
4709 | return "[[[... "; | |
4710 | p = decode_mode_spec_buf; | |
4711 | for (i = 0; i < command_loop_level; i++) | |
4712 | *p++ = '['; | |
4713 | *p = 0; | |
4714 | return decode_mode_spec_buf; | |
4715 | } | |
4716 | ||
4717 | case ']': | |
4718 | { | |
4719 | int i; | |
4720 | char *p; | |
4721 | ||
4722 | if (command_loop_level > 5) | |
4723 | return " ...]]]"; | |
4724 | p = decode_mode_spec_buf; | |
4725 | for (i = 0; i < command_loop_level; i++) | |
4726 | *p++ = ']'; | |
4727 | *p = 0; | |
4728 | return decode_mode_spec_buf; | |
4729 | } | |
4730 | ||
4731 | case '-': | |
4732 | { | |
4733 | register char *p; | |
4734 | register int i; | |
4735 | ||
4736 | if (maxwidth < sizeof (lots_of_dashes)) | |
4737 | return lots_of_dashes; | |
4738 | else | |
4739 | { | |
4740 | for (p = decode_mode_spec_buf, i = maxwidth; i > 0; i--) | |
4741 | *p++ = '-'; | |
4742 | *p = '\0'; | |
4743 | } | |
4744 | return decode_mode_spec_buf; | |
4745 | } | |
4746 | ||
a2889657 | 4747 | case 'b': |
d39b6696 | 4748 | obj = b->name; |
a2889657 | 4749 | #if 0 |
fc932ac6 | 4750 | if (maxwidth >= 3 && STRING_BYTES (XSTRING (obj)) > maxwidth) |
a2889657 JB |
4751 | { |
4752 | bcopy (XSTRING (obj)->data, decode_mode_spec_buf, maxwidth - 1); | |
4753 | decode_mode_spec_buf[maxwidth - 1] = '\\'; | |
4754 | decode_mode_spec_buf[maxwidth] = '\0'; | |
4755 | return decode_mode_spec_buf; | |
4756 | } | |
4757 | #endif | |
4758 | break; | |
4759 | ||
1af9f229 RS |
4760 | case 'c': |
4761 | { | |
4762 | int col = current_column (); | |
4763 | XSETFASTINT (w->column_number_displayed, col); | |
766525bc | 4764 | pint2str (decode_mode_spec_buf, spec_width, col); |
1af9f229 RS |
4765 | return decode_mode_spec_buf; |
4766 | } | |
4767 | ||
4768 | case 'F': | |
4769 | /* %F displays the frame name. */ | |
261bfd0e EZ |
4770 | /* Systems that can only display a single frame at a time should |
4771 | NOT replace the frame name with the (constant) frame title, | |
4772 | since then they won't be able to tell which frame is that. */ | |
4773 | if (FRAME_WINDOW_P (f) && !NILP (f->title)) | |
95184b48 | 4774 | return (char *) XSTRING (f->title)->data; |
fd8ff63d | 4775 | if (f->explicit_name || ! FRAME_WINDOW_P (f)) |
95184b48 | 4776 | return (char *) XSTRING (f->name)->data; |
9c6da96f | 4777 | return "Emacs"; |
1af9f229 | 4778 | |
a2889657 | 4779 | case 'f': |
d39b6696 | 4780 | obj = b->filename; |
a2889657 | 4781 | #if 0 |
265a9e55 | 4782 | if (NILP (obj)) |
a2889657 | 4783 | return "[none]"; |
fc932ac6 | 4784 | else if (STRINGP (obj) && STRING_BYTES (XSTRING (obj)) > maxwidth) |
a2889657 JB |
4785 | { |
4786 | bcopy ("...", decode_mode_spec_buf, 3); | |
fc932ac6 | 4787 | bcopy (XSTRING (obj)->data + STRING_BYTES (XSTRING (obj)) - maxwidth + 3, |
a2889657 JB |
4788 | decode_mode_spec_buf + 3, maxwidth - 3); |
4789 | return decode_mode_spec_buf; | |
4790 | } | |
4791 | #endif | |
4792 | break; | |
4793 | ||
aa6d10fa RS |
4794 | case 'l': |
4795 | { | |
12adba34 RS |
4796 | int startpos = XMARKER (w->start)->charpos; |
4797 | int startpos_byte = marker_byte_position (w->start); | |
4798 | int line, linepos, linepos_byte, topline; | |
aa6d10fa RS |
4799 | int nlines, junk; |
4800 | Lisp_Object tem; | |
4801 | int height = XFASTINT (w->height); | |
4802 | ||
4803 | /* If we decided that this buffer isn't suitable for line numbers, | |
4804 | don't forget that too fast. */ | |
4805 | if (EQ (w->base_line_pos, w->buffer)) | |
766525bc | 4806 | goto no_value; |
5300fd39 RS |
4807 | /* But do forget it, if the window shows a different buffer now. */ |
4808 | else if (BUFFERP (w->base_line_pos)) | |
4809 | w->base_line_pos = Qnil; | |
aa6d10fa RS |
4810 | |
4811 | /* If the buffer is very big, don't waste time. */ | |
d39b6696 | 4812 | if (BUF_ZV (b) - BUF_BEGV (b) > line_number_display_limit) |
aa6d10fa RS |
4813 | { |
4814 | w->base_line_pos = Qnil; | |
4815 | w->base_line_number = Qnil; | |
766525bc | 4816 | goto no_value; |
aa6d10fa RS |
4817 | } |
4818 | ||
4819 | if (!NILP (w->base_line_number) | |
4820 | && !NILP (w->base_line_pos) | |
12adba34 | 4821 | && XFASTINT (w->base_line_pos) <= startpos) |
aa6d10fa RS |
4822 | { |
4823 | line = XFASTINT (w->base_line_number); | |
4824 | linepos = XFASTINT (w->base_line_pos); | |
12adba34 | 4825 | linepos_byte = buf_charpos_to_bytepos (b, linepos); |
aa6d10fa RS |
4826 | } |
4827 | else | |
4828 | { | |
4829 | line = 1; | |
d39b6696 | 4830 | linepos = BUF_BEGV (b); |
12adba34 | 4831 | linepos_byte = BUF_BEGV_BYTE (b); |
aa6d10fa RS |
4832 | } |
4833 | ||
4834 | /* Count lines from base line to window start position. */ | |
12adba34 RS |
4835 | nlines = display_count_lines (linepos, linepos_byte, |
4836 | startpos_byte, | |
4837 | startpos, &junk); | |
aa6d10fa RS |
4838 | |
4839 | topline = nlines + line; | |
4840 | ||
4841 | /* Determine a new base line, if the old one is too close | |
4842 | or too far away, or if we did not have one. | |
4843 | "Too close" means it's plausible a scroll-down would | |
4844 | go back past it. */ | |
d39b6696 | 4845 | if (startpos == BUF_BEGV (b)) |
aa6d10fa | 4846 | { |
c2213350 KH |
4847 | XSETFASTINT (w->base_line_number, topline); |
4848 | XSETFASTINT (w->base_line_pos, BUF_BEGV (b)); | |
aa6d10fa RS |
4849 | } |
4850 | else if (nlines < height + 25 || nlines > height * 3 + 50 | |
d39b6696 | 4851 | || linepos == BUF_BEGV (b)) |
aa6d10fa | 4852 | { |
d39b6696 | 4853 | int limit = BUF_BEGV (b); |
12adba34 | 4854 | int limit_byte = BUF_BEGV_BYTE (b); |
aa6d10fa RS |
4855 | int position; |
4856 | int distance = (height * 2 + 30) * 200; | |
4857 | ||
4858 | if (startpos - distance > limit) | |
12adba34 RS |
4859 | { |
4860 | limit = startpos - distance; | |
4861 | limit_byte = CHAR_TO_BYTE (limit); | |
4862 | } | |
aa6d10fa | 4863 | |
12adba34 RS |
4864 | nlines = display_count_lines (startpos, startpos_byte, |
4865 | limit_byte, | |
4866 | - (height * 2 + 30), | |
aa6d10fa RS |
4867 | &position); |
4868 | /* If we couldn't find the lines we wanted within | |
4869 | 200 chars per line, | |
4870 | give up on line numbers for this window. */ | |
12adba34 | 4871 | if (position == limit_byte && limit == startpos - distance) |
aa6d10fa RS |
4872 | { |
4873 | w->base_line_pos = w->buffer; | |
4874 | w->base_line_number = Qnil; | |
766525bc | 4875 | goto no_value; |
aa6d10fa RS |
4876 | } |
4877 | ||
c2213350 | 4878 | XSETFASTINT (w->base_line_number, topline - nlines); |
12adba34 | 4879 | XSETFASTINT (w->base_line_pos, BYTE_TO_CHAR (position)); |
aa6d10fa RS |
4880 | } |
4881 | ||
4882 | /* Now count lines from the start pos to point. */ | |
12adba34 RS |
4883 | nlines = display_count_lines (startpos, startpos_byte, |
4884 | PT_BYTE, PT, &junk); | |
aa6d10fa RS |
4885 | |
4886 | /* Record that we did display the line number. */ | |
4887 | line_number_displayed = 1; | |
4888 | ||
4889 | /* Make the string to show. */ | |
766525bc | 4890 | pint2str (decode_mode_spec_buf, spec_width, topline + nlines); |
aa6d10fa | 4891 | return decode_mode_spec_buf; |
766525bc RS |
4892 | no_value: |
4893 | { | |
4894 | char* p = decode_mode_spec_buf; | |
4895 | for (spec_width -= 2; spec_width > 0; --spec_width) *p++ = ' '; | |
4896 | strcpy (p, "??"); | |
4897 | return decode_mode_spec_buf; | |
4898 | } | |
aa6d10fa RS |
4899 | } |
4900 | break; | |
4901 | ||
a2889657 | 4902 | case 'm': |
d39b6696 | 4903 | obj = b->mode_name; |
a2889657 JB |
4904 | break; |
4905 | ||
4906 | case 'n': | |
d39b6696 | 4907 | if (BUF_BEGV (b) > BUF_BEG (b) || BUF_ZV (b) < BUF_Z (b)) |
a2889657 JB |
4908 | return " Narrow"; |
4909 | break; | |
4910 | ||
a2889657 JB |
4911 | case 'p': |
4912 | { | |
4913 | int pos = marker_position (w->start); | |
d39b6696 | 4914 | int total = BUF_ZV (b) - BUF_BEGV (b); |
a2889657 | 4915 | |
d39b6696 | 4916 | if (XFASTINT (w->window_end_pos) <= BUF_Z (b) - BUF_ZV (b)) |
a2889657 | 4917 | { |
d39b6696 | 4918 | if (pos <= BUF_BEGV (b)) |
a2889657 JB |
4919 | return "All"; |
4920 | else | |
4921 | return "Bottom"; | |
4922 | } | |
d39b6696 | 4923 | else if (pos <= BUF_BEGV (b)) |
a2889657 JB |
4924 | return "Top"; |
4925 | else | |
4926 | { | |
3c7d31b9 RS |
4927 | if (total > 1000000) |
4928 | /* Do it differently for a large value, to avoid overflow. */ | |
4929 | total = ((pos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
4930 | else | |
4931 | total = ((pos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
a2889657 JB |
4932 | /* We can't normally display a 3-digit number, |
4933 | so get us a 2-digit number that is close. */ | |
4934 | if (total == 100) | |
4935 | total = 99; | |
4936 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
4937 | return decode_mode_spec_buf; | |
4938 | } | |
4939 | } | |
4940 | ||
8ffcb79f RS |
4941 | /* Display percentage of size above the bottom of the screen. */ |
4942 | case 'P': | |
4943 | { | |
4944 | int toppos = marker_position (w->start); | |
d39b6696 KH |
4945 | int botpos = BUF_Z (b) - XFASTINT (w->window_end_pos); |
4946 | int total = BUF_ZV (b) - BUF_BEGV (b); | |
8ffcb79f | 4947 | |
d39b6696 | 4948 | if (botpos >= BUF_ZV (b)) |
8ffcb79f | 4949 | { |
d39b6696 | 4950 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
4951 | return "All"; |
4952 | else | |
4953 | return "Bottom"; | |
4954 | } | |
4955 | else | |
4956 | { | |
3c7d31b9 RS |
4957 | if (total > 1000000) |
4958 | /* Do it differently for a large value, to avoid overflow. */ | |
4959 | total = ((botpos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
4960 | else | |
4961 | total = ((botpos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
8ffcb79f RS |
4962 | /* We can't normally display a 3-digit number, |
4963 | so get us a 2-digit number that is close. */ | |
4964 | if (total == 100) | |
4965 | total = 99; | |
d39b6696 | 4966 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
4967 | sprintf (decode_mode_spec_buf, "Top%2d%%", total); |
4968 | else | |
4969 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
4970 | return decode_mode_spec_buf; | |
4971 | } | |
4972 | } | |
4973 | ||
1af9f229 RS |
4974 | case 's': |
4975 | /* status of process */ | |
4976 | obj = Fget_buffer_process (w->buffer); | |
4977 | if (NILP (obj)) | |
4978 | return "no process"; | |
4979 | #ifdef subprocesses | |
4980 | obj = Fsymbol_name (Fprocess_status (obj)); | |
4981 | #endif | |
4982 | break; | |
d39b6696 | 4983 | |
1af9f229 RS |
4984 | case 't': /* indicate TEXT or BINARY */ |
4985 | #ifdef MODE_LINE_BINARY_TEXT | |
4986 | return MODE_LINE_BINARY_TEXT (b); | |
4987 | #else | |
4988 | return "T"; | |
4989 | #endif | |
1c9241f5 KH |
4990 | |
4991 | case 'z': | |
4992 | /* coding-system (not including end-of-line format) */ | |
4993 | case 'Z': | |
4994 | /* coding-system (including end-of-line type) */ | |
4995 | { | |
4996 | int eol_flag = (c == 'Z'); | |
539b4d41 | 4997 | char *p = decode_mode_spec_buf; |
1c9241f5 | 4998 | |
d30e754b | 4999 | if (! FRAME_WINDOW_P (f)) |
1c9241f5 | 5000 | { |
11c52c4f RS |
5001 | /* No need to mention EOL here--the terminal never needs |
5002 | to do EOL conversion. */ | |
5003 | p = decode_mode_spec_coding (keyboard_coding.symbol, p, 0); | |
5004 | p = decode_mode_spec_coding (terminal_coding.symbol, p, 0); | |
1c9241f5 | 5005 | } |
f13c925f | 5006 | p = decode_mode_spec_coding (b->buffer_file_coding_system, |
539b4d41 | 5007 | p, eol_flag); |
f13c925f | 5008 | |
11c52c4f | 5009 | #if 0 /* This proves to be annoying; I think we can do without. -- rms. */ |
1c9241f5 KH |
5010 | #ifdef subprocesses |
5011 | obj = Fget_buffer_process (Fcurrent_buffer ()); | |
5012 | if (PROCESSP (obj)) | |
5013 | { | |
5014 | p = decode_mode_spec_coding (XPROCESS (obj)->decode_coding_system, | |
5015 | p, eol_flag); | |
5016 | p = decode_mode_spec_coding (XPROCESS (obj)->encode_coding_system, | |
5017 | p, eol_flag); | |
5018 | } | |
5019 | #endif /* subprocesses */ | |
11c52c4f | 5020 | #endif /* 0 */ |
1c9241f5 KH |
5021 | *p = 0; |
5022 | return decode_mode_spec_buf; | |
5023 | } | |
a2889657 | 5024 | } |
d39b6696 | 5025 | |
e24c997d | 5026 | if (STRINGP (obj)) |
a2889657 JB |
5027 | return (char *) XSTRING (obj)->data; |
5028 | else | |
5029 | return ""; | |
5030 | } | |
59b49f63 | 5031 | \f |
12adba34 RS |
5032 | /* Count up to COUNT lines starting from START / START_BYTE. |
5033 | But don't go beyond LIMIT_BYTE. | |
5034 | Return the number of lines thus found (always nonnegative). | |
59b49f63 | 5035 | |
12adba34 | 5036 | Set *BYTE_POS_PTR to 1 if we found COUNT lines, 0 if we hit LIMIT. */ |
59b49f63 RS |
5037 | |
5038 | static int | |
12adba34 RS |
5039 | display_count_lines (start, start_byte, limit_byte, count, byte_pos_ptr) |
5040 | int start, start_byte, limit_byte, count; | |
5041 | int *byte_pos_ptr; | |
59b49f63 | 5042 | { |
59b49f63 RS |
5043 | register unsigned char *cursor; |
5044 | unsigned char *base; | |
5045 | ||
5046 | register int ceiling; | |
5047 | register unsigned char *ceiling_addr; | |
12adba34 | 5048 | int orig_count = count; |
59b49f63 RS |
5049 | |
5050 | /* If we are not in selective display mode, | |
5051 | check only for newlines. */ | |
12adba34 RS |
5052 | int selective_display = (!NILP (current_buffer->selective_display) |
5053 | && !INTEGERP (current_buffer->selective_display)); | |
59b49f63 RS |
5054 | |
5055 | if (count > 0) | |
12adba34 RS |
5056 | { |
5057 | while (start_byte < limit_byte) | |
5058 | { | |
5059 | ceiling = BUFFER_CEILING_OF (start_byte); | |
5060 | ceiling = min (limit_byte - 1, ceiling); | |
5061 | ceiling_addr = BYTE_POS_ADDR (ceiling) + 1; | |
5062 | base = (cursor = BYTE_POS_ADDR (start_byte)); | |
5063 | while (1) | |
5064 | { | |
5065 | if (selective_display) | |
5066 | while (*cursor != '\n' && *cursor != 015 && ++cursor != ceiling_addr) | |
5067 | ; | |
5068 | else | |
5069 | while (*cursor != '\n' && ++cursor != ceiling_addr) | |
5070 | ; | |
5071 | ||
5072 | if (cursor != ceiling_addr) | |
5073 | { | |
5074 | if (--count == 0) | |
5075 | { | |
5076 | start_byte += cursor - base + 1; | |
5077 | *byte_pos_ptr = start_byte; | |
5078 | return orig_count; | |
5079 | } | |
5080 | else | |
5081 | if (++cursor == ceiling_addr) | |
5082 | break; | |
5083 | } | |
5084 | else | |
5085 | break; | |
5086 | } | |
5087 | start_byte += cursor - base; | |
5088 | } | |
5089 | } | |
59b49f63 RS |
5090 | else |
5091 | { | |
12adba34 RS |
5092 | while (start_byte > limit_byte) |
5093 | { | |
5094 | ceiling = BUFFER_FLOOR_OF (start_byte - 1); | |
5095 | ceiling = max (limit_byte, ceiling); | |
5096 | ceiling_addr = BYTE_POS_ADDR (ceiling) - 1; | |
5097 | base = (cursor = BYTE_POS_ADDR (start_byte - 1) + 1); | |
59b49f63 RS |
5098 | while (1) |
5099 | { | |
12adba34 RS |
5100 | if (selective_display) |
5101 | while (--cursor != ceiling_addr | |
5102 | && *cursor != '\n' && *cursor != 015) | |
5103 | ; | |
5104 | else | |
5105 | while (--cursor != ceiling_addr && *cursor != '\n') | |
5106 | ; | |
5107 | ||
59b49f63 RS |
5108 | if (cursor != ceiling_addr) |
5109 | { | |
5110 | if (++count == 0) | |
5111 | { | |
12adba34 RS |
5112 | start_byte += cursor - base + 1; |
5113 | *byte_pos_ptr = start_byte; | |
5114 | /* When scanning backwards, we should | |
5115 | not count the newline posterior to which we stop. */ | |
5116 | return - orig_count - 1; | |
59b49f63 RS |
5117 | } |
5118 | } | |
5119 | else | |
5120 | break; | |
5121 | } | |
12adba34 RS |
5122 | /* Here we add 1 to compensate for the last decrement |
5123 | of CURSOR, which took it past the valid range. */ | |
5124 | start_byte += cursor - base + 1; | |
59b49f63 RS |
5125 | } |
5126 | } | |
5127 | ||
12adba34 | 5128 | *byte_pos_ptr = limit_byte; |
aa6d10fa | 5129 | |
12adba34 RS |
5130 | if (count < 0) |
5131 | return - orig_count + count; | |
5132 | return orig_count - count; | |
aa6d10fa | 5133 | |
12adba34 | 5134 | } |
a2889657 JB |
5135 | \f |
5136 | /* Display STRING on one line of window W, starting at HPOS. | |
5137 | Display at position VPOS. Caller should have done get_display_line. | |
11e82b76 | 5138 | If VPOS == -1, display it as the current frame's title. |
90adcf20 | 5139 | LENGTH is the length of STRING, or -1 meaning STRING is null-terminated. |
a2889657 JB |
5140 | |
5141 | TRUNCATE is GLYPH to display at end if truncated. Zero for none. | |
5142 | ||
5143 | MINCOL is the first column ok to end at. (Pad with spaces to this col.) | |
5144 | MAXCOL is the last column ok to end at. Truncate here. | |
5145 | -1 for MINCOL or MAXCOL means no explicit minimum or maximum. | |
44fa5b1e | 5146 | Both count from the left edge of the frame, as does HPOS. |
a2889657 JB |
5147 | The right edge of W is an implicit maximum. |
5148 | If TRUNCATE is nonzero, the implicit maximum is one column before the edge. | |
5149 | ||
278feba9 RS |
5150 | OBEY_WINDOW_WIDTH says to put spaces or vertical bars |
5151 | at the place where the current window ends in this line | |
5152 | and not display anything beyond there. Otherwise, only MAXCOL | |
5153 | controls where to stop output. | |
5154 | ||
a3788d53 RS |
5155 | MULTIBYTE can be 0 meaning do not display multibyte chars, |
5156 | 1 meaning do display them, or -1 meaning obey the current buffer's | |
5157 | value of enable_multibyte_characters. | |
5158 | ||
278feba9 | 5159 | Returns ending hpos. */ |
a2889657 JB |
5160 | |
5161 | static int | |
278feba9 | 5162 | display_string (w, vpos, string, length, hpos, truncate, |
a3788d53 | 5163 | obey_window_width, mincol, maxcol, multibyte) |
a2889657 JB |
5164 | struct window *w; |
5165 | unsigned char *string; | |
90adcf20 | 5166 | int length; |
a2889657 JB |
5167 | int vpos, hpos; |
5168 | GLYPH truncate; | |
278feba9 | 5169 | int obey_window_width; |
a2889657 | 5170 | int mincol, maxcol; |
a3788d53 | 5171 | int multibyte; |
a2889657 JB |
5172 | { |
5173 | register int c; | |
d3413a53 | 5174 | int truncated; |
a2889657 JB |
5175 | register GLYPH *p1; |
5176 | int hscroll = XINT (w->hscroll); | |
253c7d2f | 5177 | int tab_width = XINT (XBUFFER (w->buffer)->tab_width); |
a2889657 JB |
5178 | register GLYPH *start; |
5179 | register GLYPH *end; | |
b1d1124b JB |
5180 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
5181 | struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (f); | |
a2889657 JB |
5182 | GLYPH *p1start = desired_glyphs->glyphs[vpos] + hpos; |
5183 | int window_width = XFASTINT (w->width); | |
5184 | ||
5185 | /* Use the standard display table, not the window's display table. | |
5186 | We don't want the mode line in rot13. */ | |
f908610f | 5187 | register struct Lisp_Char_Table *dp = 0; |
efc63ef0 | 5188 | int i; |
a2889657 | 5189 | |
a3788d53 RS |
5190 | if (multibyte == -1) |
5191 | multibyte = !NILP (current_buffer->enable_multibyte_characters); | |
5192 | /* Now multibyte is 1 if we should display multibyte characters. */ | |
5193 | ||
f908610f RS |
5194 | if (DISP_TABLE_P (Vstandard_display_table)) |
5195 | dp = XCHAR_TABLE (Vstandard_display_table); | |
a2889657 | 5196 | |
54ff581a | 5197 | if (tab_width <= 0 || tab_width > 1000) tab_width = 8; |
a2889657 JB |
5198 | |
5199 | p1 = p1start; | |
a27062f0 | 5200 | start = desired_glyphs->glyphs[vpos]; |
a2889657 | 5201 | |
278feba9 | 5202 | if (obey_window_width) |
b1d1124b | 5203 | { |
a27062f0 | 5204 | start += XFASTINT (w->left); |
278feba9 RS |
5205 | end = start + window_width - (truncate != 0); |
5206 | ||
73f194f1 | 5207 | if (!WINDOW_RIGHTMOST_P (w)) |
b1d1124b | 5208 | { |
73f194f1 | 5209 | if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_RIGHT (f)) |
278feba9 RS |
5210 | { |
5211 | int i; | |
b1d1124b | 5212 | |
5802e919 | 5213 | for (i = 0; i < FRAME_SCROLL_BAR_COLS (f); i++) |
278feba9 RS |
5214 | *end-- = ' '; |
5215 | } | |
73f194f1 | 5216 | else if (!FRAME_HAS_VERTICAL_SCROLL_BARS (f)) |
278feba9 | 5217 | *end-- = '|'; |
b1d1124b | 5218 | } |
b1d1124b | 5219 | } |
a2889657 | 5220 | |
278feba9 RS |
5221 | if (! obey_window_width |
5222 | || (maxcol >= 0 && end - desired_glyphs->glyphs[vpos] > maxcol)) | |
a2889657 | 5223 | end = desired_glyphs->glyphs[vpos] + maxcol; |
278feba9 | 5224 | |
efc63ef0 | 5225 | /* Store 0 in charstart for these columns. */ |
bd5dec8e | 5226 | for (i = (hpos >= 0 ? hpos : 0); i < end - p1start + hpos; i++) |
efc63ef0 RS |
5227 | desired_glyphs->charstarts[vpos][i] = 0; |
5228 | ||
a2889657 JB |
5229 | if (maxcol >= 0 && mincol > maxcol) |
5230 | mincol = maxcol; | |
5231 | ||
1c9241f5 KH |
5232 | if (length < 0) |
5233 | /* We need this value for multibyte characters. */ | |
5234 | length = strlen (string); | |
5235 | ||
d3413a53 RS |
5236 | /* We set truncated to 1 if we get stopped by trying to pass END |
5237 | (that is, trying to pass MAXCOL.) */ | |
5238 | truncated = 0; | |
5239 | while (1) | |
a2889657 | 5240 | { |
1c9241f5 KH |
5241 | int len; |
5242 | ||
5243 | if (length <= 0) | |
90adcf20 | 5244 | break; |
1c9241f5 KH |
5245 | if (multibyte) |
5246 | c = STRING_CHAR_AND_LENGTH (string, length, len); | |
5247 | else | |
5248 | c = *string, len = 1; | |
5249 | ||
5250 | string += len, length -= len; | |
90adcf20 | 5251 | |
d3413a53 RS |
5252 | if (p1 >= end) |
5253 | { | |
5254 | truncated = 1; | |
5255 | break; | |
5256 | } | |
5257 | ||
376b0e59 RS |
5258 | if (dp != 0 && VECTORP (DISP_CHAR_VECTOR (dp, c))) |
5259 | { | |
5260 | p1 = copy_part_of_rope (f, p1, start, | |
5261 | XVECTOR (DISP_CHAR_VECTOR (dp, c))->contents, | |
5262 | XVECTOR (DISP_CHAR_VECTOR (dp, c))->size, | |
5263 | 0); | |
5264 | } | |
5265 | else if (c >= 040 && c < 0177) | |
a2889657 JB |
5266 | { |
5267 | if (p1 >= start) | |
5268 | *p1 = c; | |
5269 | p1++; | |
5270 | } | |
5271 | else if (c == '\t') | |
5272 | { | |
5273 | do | |
5274 | { | |
5275 | if (p1 >= start && p1 < end) | |
5276 | *p1 = SPACEGLYPH; | |
5277 | p1++; | |
5278 | } | |
5279 | while ((p1 - start + hscroll - (hscroll > 0)) % tab_width); | |
5280 | } | |
ded34426 | 5281 | else if (c < 0200 && ! NILP (buffer_defaults.ctl_arrow)) |
a2889657 JB |
5282 | { |
5283 | if (p1 >= start) | |
e57bca5d KH |
5284 | *p1 = (fix_glyph |
5285 | (f, (dp && INTEGERP (DISP_CTRL_GLYPH (dp)) | |
5286 | && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (dp))) | |
5287 | ? XINT (DISP_CTRL_GLYPH (dp)) : '^'), | |
5288 | 0)); | |
a2889657 | 5289 | p1++; |
6e8290aa | 5290 | if (p1 >= start && p1 < end) |
a2889657 JB |
5291 | *p1 = c ^ 0100; |
5292 | p1++; | |
5293 | } | |
1c9241f5 KH |
5294 | else |
5295 | { | |
a688bb24 KH |
5296 | /* C is a multibyte character, control character or a binary |
5297 | byte data. */ | |
5298 | int remaining_bytes = len; | |
1c9241f5 | 5299 | |
a688bb24 | 5300 | if (c >= 0400 && CHAR_VALID_P (c, 0)) |
1c9241f5 | 5301 | { |
a688bb24 KH |
5302 | /* C is a multibyte character. */ |
5303 | int charset = CHAR_CHARSET (c); | |
5304 | int columns = (charset == CHARSET_COMPOSITION | |
5305 | ? cmpchar_table[COMPOSITE_CHAR_ID (c)]->width | |
5306 | : CHARSET_WIDTH (charset)); | |
5307 | ||
5308 | remaining_bytes -= CHARSET_BYTES (charset); | |
5309 | if (p1 < start) | |
1c9241f5 | 5310 | { |
a688bb24 KH |
5311 | /* Since we can't show the left part of C, fill all |
5312 | columns with spaces. */ | |
5313 | columns -= start - p1; | |
5314 | p1 = start; | |
5315 | while (columns--) | |
5316 | { | |
5317 | if (p1 < end) | |
5318 | *p1 = SPACEGLYPH; | |
5319 | p1++; | |
5320 | } | |
1c9241f5 | 5321 | } |
a688bb24 | 5322 | else if (p1 + columns > end) |
1c9241f5 | 5323 | { |
a688bb24 KH |
5324 | /* Since we can't show the right part of C, fill all |
5325 | columns with TRUNCATE if TRUNCATE is specified. */ | |
5326 | if (truncate) | |
5327 | { | |
5328 | while (p1 < end) | |
5329 | *p1++ = fix_glyph (f, truncate, 0); | |
5330 | /* And tell the line is truncated. */ | |
5331 | truncated = 1; | |
5332 | } | |
5333 | break; | |
5334 | } | |
5335 | else | |
5336 | { | |
5337 | /* We can show the whole glyph of C. */ | |
5338 | *p1++ = c; | |
5339 | while (--columns) | |
5340 | *p1++ = c | GLYPH_MASK_PADDING; | |
1c9241f5 | 5341 | } |
1c9241f5 | 5342 | } |
a688bb24 KH |
5343 | |
5344 | while (remaining_bytes > 0) | |
1c9241f5 | 5345 | { |
a688bb24 KH |
5346 | c = *(string - remaining_bytes--); |
5347 | ||
5348 | if (p1 >= start) | |
5349 | *p1 = (fix_glyph | |
5350 | (f, (dp && INTEGERP (DISP_ESCAPE_GLYPH (dp)) | |
5351 | && GLYPH_CHAR_VALID_P (XINT (DISP_ESCAPE_GLYPH (dp))) | |
5352 | ? XINT (DISP_ESCAPE_GLYPH (dp)) : '\\'), | |
5353 | 0)); | |
5354 | p1++; | |
5355 | if (p1 >= start && p1 < end) | |
5356 | *p1 = (c >> 6) + '0'; | |
5357 | p1++; | |
5358 | if (p1 >= start && p1 < end) | |
5359 | *p1 = (7 & (c >> 3)) + '0'; | |
5360 | p1++; | |
5361 | if (p1 >= start && p1 < end) | |
5362 | *p1 = (7 & c) + '0'; | |
5363 | p1++; | |
1c9241f5 KH |
5364 | } |
5365 | } | |
a2889657 JB |
5366 | } |
5367 | ||
d3413a53 | 5368 | if (truncated) |
a2889657 JB |
5369 | { |
5370 | p1 = end; | |
278feba9 | 5371 | if (truncate) *p1++ = fix_glyph (f, truncate, 0); |
a2889657 JB |
5372 | } |
5373 | else if (mincol >= 0) | |
5374 | { | |
5375 | end = desired_glyphs->glyphs[vpos] + mincol; | |
5376 | while (p1 < end) | |
5377 | *p1++ = SPACEGLYPH; | |
5378 | } | |
5379 | ||
5380 | { | |
5381 | register int len = p1 - desired_glyphs->glyphs[vpos]; | |
5382 | ||
5383 | if (len > desired_glyphs->used[vpos]) | |
5384 | desired_glyphs->used[vpos] = len; | |
5385 | desired_glyphs->glyphs[vpos][desired_glyphs->used[vpos]] = 0; | |
5386 | ||
5387 | return len; | |
5388 | } | |
5389 | } | |
5390 | \f | |
642eefc6 RS |
5391 | /* This is like a combination of memq and assq. |
5392 | Return 1 if PROPVAL appears as an element of LIST | |
5393 | or as the car of an element of LIST. | |
af460d46 RS |
5394 | If PROPVAL is a list, compare each element against LIST |
5395 | in that way, and return 1 if any element of PROPVAL is found in LIST. | |
642eefc6 RS |
5396 | Otherwise return 0. |
5397 | This function cannot quit. */ | |
5398 | ||
5399 | int | |
5400 | invisible_p (propval, list) | |
5401 | register Lisp_Object propval; | |
5402 | Lisp_Object list; | |
5403 | { | |
af460d46 RS |
5404 | register Lisp_Object tail, proptail; |
5405 | for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr) | |
642eefc6 RS |
5406 | { |
5407 | register Lisp_Object tem; | |
af460d46 | 5408 | tem = XCONS (tail)->car; |
642eefc6 RS |
5409 | if (EQ (propval, tem)) |
5410 | return 1; | |
5411 | if (CONSP (tem) && EQ (propval, XCONS (tem)->car)) | |
5412 | return 1; | |
5413 | } | |
af460d46 RS |
5414 | if (CONSP (propval)) |
5415 | for (proptail = propval; CONSP (proptail); | |
5416 | proptail = XCONS (proptail)->cdr) | |
5417 | { | |
5418 | Lisp_Object propelt; | |
5419 | propelt = XCONS (proptail)->car; | |
5420 | for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr) | |
5421 | { | |
5422 | register Lisp_Object tem; | |
5423 | tem = XCONS (tail)->car; | |
5424 | if (EQ (propelt, tem)) | |
5425 | return 1; | |
5426 | if (CONSP (tem) && EQ (propelt, XCONS (tem)->car)) | |
5427 | return 1; | |
5428 | } | |
5429 | } | |
642eefc6 RS |
5430 | return 0; |
5431 | } | |
5432 | ||
5433 | /* Return 1 if PROPVAL appears as the car of an element of LIST | |
5434 | and the cdr of that element is non-nil. | |
af460d46 RS |
5435 | If PROPVAL is a list, check each element of PROPVAL in that way, |
5436 | and the first time some element is found, | |
5437 | return 1 if the cdr of that element is non-nil. | |
642eefc6 RS |
5438 | Otherwise return 0. |
5439 | This function cannot quit. */ | |
5440 | ||
5441 | int | |
5442 | invisible_ellipsis_p (propval, list) | |
5443 | register Lisp_Object propval; | |
5444 | Lisp_Object list; | |
5445 | { | |
af460d46 RS |
5446 | register Lisp_Object tail, proptail; |
5447 | for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr) | |
642eefc6 RS |
5448 | { |
5449 | register Lisp_Object tem; | |
af460d46 | 5450 | tem = XCONS (tail)->car; |
642eefc6 RS |
5451 | if (CONSP (tem) && EQ (propval, XCONS (tem)->car)) |
5452 | return ! NILP (XCONS (tem)->cdr); | |
5453 | } | |
af460d46 RS |
5454 | if (CONSP (propval)) |
5455 | for (proptail = propval; CONSP (proptail); | |
5456 | proptail = XCONS (proptail)->cdr) | |
5457 | { | |
5458 | Lisp_Object propelt; | |
5459 | propelt = XCONS (proptail)->car; | |
5460 | for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr) | |
5461 | { | |
5462 | register Lisp_Object tem; | |
5463 | tem = XCONS (tail)->car; | |
5464 | if (CONSP (tem) && EQ (propelt, XCONS (tem)->car)) | |
5465 | return ! NILP (XCONS (tem)->cdr); | |
5466 | } | |
5467 | } | |
642eefc6 RS |
5468 | return 0; |
5469 | } | |
5470 | \f | |
a2889657 JB |
5471 | void |
5472 | syms_of_xdisp () | |
5473 | { | |
735c094c KH |
5474 | staticpro (&Qinhibit_redisplay); |
5475 | Qinhibit_redisplay = intern ("inhibit-redisplay"); | |
5476 | ||
cf074754 RS |
5477 | staticpro (&Qmenu_bar_update_hook); |
5478 | Qmenu_bar_update_hook = intern ("menu-bar-update-hook"); | |
5479 | ||
d46fb96a | 5480 | staticpro (&Qoverriding_terminal_local_map); |
7079aefa | 5481 | Qoverriding_terminal_local_map = intern ("overriding-terminal-local-map"); |
d46fb96a | 5482 | |
399164b4 KH |
5483 | staticpro (&Qoverriding_local_map); |
5484 | Qoverriding_local_map = intern ("overriding-local-map"); | |
5485 | ||
75c43375 RS |
5486 | staticpro (&Qwindow_scroll_functions); |
5487 | Qwindow_scroll_functions = intern ("window-scroll-functions"); | |
5488 | ||
e0bfbde6 RS |
5489 | staticpro (&Qredisplay_end_trigger_functions); |
5490 | Qredisplay_end_trigger_functions = intern ("redisplay-end-trigger-functions"); | |
67481ae5 | 5491 | |
2e54982e RS |
5492 | staticpro (&Qinhibit_point_motion_hooks); |
5493 | Qinhibit_point_motion_hooks = intern ("inhibit-point-motion-hooks"); | |
5494 | ||
a2889657 JB |
5495 | staticpro (&last_arrow_position); |
5496 | staticpro (&last_arrow_string); | |
5497 | last_arrow_position = Qnil; | |
5498 | last_arrow_string = Qnil; | |
5499 | ||
735c094c KH |
5500 | DEFVAR_LISP ("inhibit-redisplay", &Vinhibit_redisplay, |
5501 | "Non-nil means don't actually do any redisplay.\n\ | |
5502 | This is used for internal purposes."); | |
5503 | Vinhibit_redisplay = Qnil; | |
5504 | ||
a2889657 | 5505 | DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string, |
8c45d522 | 5506 | "String (or mode line construct) included (normally) in `mode-line-format'."); |
a2889657 JB |
5507 | Vglobal_mode_string = Qnil; |
5508 | ||
5509 | DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position, | |
5510 | "Marker for where to display an arrow on top of the buffer text.\n\ | |
5511 | This must be the beginning of a line in order to work.\n\ | |
5512 | See also `overlay-arrow-string'."); | |
5513 | Voverlay_arrow_position = Qnil; | |
5514 | ||
5515 | DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string, | |
5516 | "String to display as an arrow. See also `overlay-arrow-position'."); | |
5517 | Voverlay_arrow_string = Qnil; | |
5518 | ||
5519 | DEFVAR_INT ("scroll-step", &scroll_step, | |
5520 | "*The number of lines to try scrolling a window by when point moves out.\n\ | |
44fa5b1e JB |
5521 | If that fails to bring point back on frame, point is centered instead.\n\ |
5522 | If this is zero, point is always centered after it moves off frame."); | |
a2889657 | 5523 | |
0789adb2 RS |
5524 | DEFVAR_INT ("scroll-conservatively", &scroll_conservatively, |
5525 | "*Scroll up to this many lines, to bring point back on screen."); | |
5526 | scroll_conservatively = 0; | |
5527 | ||
9afd2168 RS |
5528 | DEFVAR_INT ("scroll-margin", &scroll_margin, |
5529 | "*Number of lines of margin at the top and bottom of a window.\n\ | |
5530 | Recenter the window whenever point gets within this many lines\n\ | |
5531 | of the top or bottom of the window."); | |
5532 | scroll_margin = 0; | |
5533 | ||
a2889657 JB |
5534 | DEFVAR_INT ("debug-end-pos", &debug_end_pos, "Don't ask"); |
5535 | ||
5536 | DEFVAR_BOOL ("truncate-partial-width-windows", | |
5537 | &truncate_partial_width_windows, | |
44fa5b1e | 5538 | "*Non-nil means truncate lines in all windows less than full frame wide."); |
a2889657 JB |
5539 | truncate_partial_width_windows = 1; |
5540 | ||
5541 | DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video, | |
5542 | "*Non-nil means use inverse video for the mode line."); | |
5543 | mode_line_inverse_video = 1; | |
aa6d10fa RS |
5544 | |
5545 | DEFVAR_INT ("line-number-display-limit", &line_number_display_limit, | |
db4f2bfa KH |
5546 | "*Maximum buffer size (in characters) for line number display\n\ |
5547 | If the buffer is bigger than this, the line number does not appear\n\ | |
9f027393 | 5548 | in the mode line."); |
aa6d10fa | 5549 | line_number_display_limit = 1000000; |
fba9ce76 RS |
5550 | |
5551 | DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows, | |
5552 | "*Non-nil means highlight region even in nonselected windows."); | |
293a54ce | 5553 | highlight_nonselected_windows = 0; |
d39b6696 KH |
5554 | |
5555 | DEFVAR_BOOL ("multiple-frames", &multiple_frames, | |
3450d04c KH |
5556 | "Non-nil if more than one frame is visible on this display.\n\ |
5557 | Minibuffer-only frames don't count, but iconified frames do.\n\ | |
4c2eb242 RS |
5558 | This variable is not guaranteed to be accurate except while processing\n\ |
5559 | `frame-title-format' and `icon-title-format'."); | |
d39b6696 KH |
5560 | |
5561 | DEFVAR_LISP ("frame-title-format", &Vframe_title_format, | |
5562 | "Template for displaying the titlebar of visible frames.\n\ | |
5563 | \(Assuming the window manager supports this feature.)\n\ | |
5564 | This variable has the same structure as `mode-line-format' (which see),\n\ | |
5565 | and is used only on frames for which no explicit name has been set\n\ | |
5566 | \(see `modify-frame-parameters')."); | |
5567 | DEFVAR_LISP ("icon-title-format", &Vicon_title_format, | |
5568 | "Template for displaying the titlebar of an iconified frame.\n\ | |
5569 | \(Assuming the window manager supports this feature.)\n\ | |
5570 | This variable has the same structure as `mode-line-format' (which see),\n\ | |
5571 | and is used only on frames for which no explicit name has been set\n\ | |
5572 | \(see `modify-frame-parameters')."); | |
5573 | Vicon_title_format | |
5574 | = Vframe_title_format | |
5575 | = Fcons (intern ("multiple-frames"), | |
5576 | Fcons (build_string ("%b"), | |
5577 | Fcons (Fcons (build_string (""), | |
5578 | Fcons (intern ("invocation-name"), | |
5579 | Fcons (build_string ("@"), | |
5580 | Fcons (intern ("system-name"), | |
5581 | Qnil)))), | |
5582 | Qnil))); | |
5992c4f7 KH |
5583 | |
5584 | DEFVAR_LISP ("message-log-max", &Vmessage_log_max, | |
5585 | "Maximum number of lines to keep in the message log buffer.\n\ | |
5586 | If nil, disable message logging. If t, log messages but don't truncate\n\ | |
5587 | the buffer when it becomes large."); | |
5588 | XSETFASTINT (Vmessage_log_max, 50); | |
08b610e4 RS |
5589 | |
5590 | DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions, | |
5591 | "Functions called before redisplay, if window sizes have changed.\n\ | |
5592 | The value should be a list of functions that take one argument.\n\ | |
5593 | Just before redisplay, for each frame, if any of its windows have changed\n\ | |
5594 | size since the last redisplay, or have been split or deleted,\n\ | |
5595 | all the functions in the list are called, with the frame as argument."); | |
5596 | Vwindow_size_change_functions = Qnil; | |
75c43375 RS |
5597 | |
5598 | DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions, | |
010494d0 | 5599 | "List of functions to call before redisplaying a window with scrolling.\n\ |
75c43375 | 5600 | Each function is called with two arguments, the window\n\ |
8d9583b0 RS |
5601 | and its new display-start position. Note that the value of `window-end'\n\ |
5602 | is not valid when these functions are called."); | |
75c43375 | 5603 | Vwindow_scroll_functions = Qnil; |
010494d0 KH |
5604 | |
5605 | DEFVAR_INT ("minibuffer-scroll-overlap", &minibuffer_scroll_overlap, | |
5606 | "*Number of characters of overlap when scrolling a one-line window.\n\ | |
5607 | This commonly affects the minibuffer window, hence the name of the variable."); | |
5608 | minibuffer_scroll_overlap = 20; | |
7bbe686f AI |
5609 | |
5610 | DEFVAR_BOOL ("unibyte-display-via-language-environment", | |
5611 | &unibyte_display_via_language_environment, | |
5612 | "*Non-nil means display unibyte text according to language environment.\n\ | |
5613 | Specifically this means that unibyte non-ASCII characters\n\ | |
5614 | are displayed by converting them to the equivalent multibyte characters\n\ | |
5615 | according to the current language environment. As a result, they are\n\ | |
5616 | displayed according to the current fontset."); | |
5617 | unibyte_display_via_language_environment = 0; | |
a2889657 JB |
5618 | } |
5619 | ||
5620 | /* initialize the window system */ | |
dfcf069d | 5621 | void |
a2889657 JB |
5622 | init_xdisp () |
5623 | { | |
5624 | Lisp_Object root_window; | |
5625 | #ifndef COMPILER_REGISTER_BUG | |
5626 | register | |
5627 | #endif /* COMPILER_REGISTER_BUG */ | |
5628 | struct window *mini_w; | |
5629 | ||
5630 | this_line_bufpos = 0; | |
5631 | ||
5632 | mini_w = XWINDOW (minibuf_window); | |
11e82b76 | 5633 | root_window = FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w))); |
a2889657 JB |
5634 | |
5635 | echo_area_glyphs = 0; | |
5636 | previous_echo_glyphs = 0; | |
5637 | ||
5638 | if (!noninteractive) | |
5639 | { | |
44fa5b1e | 5640 | FRAME_PTR f = XFRAME (WINDOW_FRAME (XWINDOW (root_window))); |
12c226c5 RS |
5641 | XSETFASTINT (XWINDOW (root_window)->top, FRAME_MENU_BAR_LINES (f)); |
5642 | set_window_height (root_window, | |
5643 | FRAME_HEIGHT (f) - 1 - FRAME_MENU_BAR_LINES (f), | |
5644 | 0); | |
c2213350 | 5645 | XSETFASTINT (mini_w->top, FRAME_HEIGHT (f) - 1); |
a2889657 JB |
5646 | set_window_height (minibuf_window, 1, 0); |
5647 | ||
c2213350 KH |
5648 | XSETFASTINT (XWINDOW (root_window)->width, FRAME_WIDTH (f)); |
5649 | XSETFASTINT (mini_w->width, FRAME_WIDTH (f)); | |
a2889657 JB |
5650 | } |
5651 | } |