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" | |
a2889657 | 43 | |
8f3343d0 | 44 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) |
76412d64 | 45 | extern void set_frame_menubar (); |
cd6dfed6 | 46 | extern int pending_menu_activation; |
76412d64 RS |
47 | #endif |
48 | ||
a2889657 JB |
49 | extern int interrupt_input; |
50 | extern int command_loop_level; | |
51 | ||
b6436d4e RS |
52 | extern int minibuffer_auto_raise; |
53 | ||
c4628384 RS |
54 | extern Lisp_Object Qface; |
55 | ||
399164b4 KH |
56 | extern Lisp_Object Voverriding_local_map; |
57 | extern Lisp_Object Voverriding_local_map_menu_flag; | |
58 | ||
d46fb96a | 59 | Lisp_Object Qoverriding_local_map, Qoverriding_terminal_local_map; |
75c43375 | 60 | Lisp_Object Qwindow_scroll_functions, Vwindow_scroll_functions; |
e0bfbde6 | 61 | Lisp_Object Qredisplay_end_trigger_functions; |
399164b4 | 62 | |
f88eb0b6 | 63 | /* Nonzero means print newline to stdout before next minibuffer message. */ |
a2889657 JB |
64 | |
65 | int noninteractive_need_newline; | |
66 | ||
f88eb0b6 KH |
67 | /* Nonzero means print newline to message log before next message. */ |
68 | ||
3c6595e0 | 69 | static int message_log_need_newline; |
f88eb0b6 | 70 | |
a2889657 JB |
71 | #define min(a, b) ((a) < (b) ? (a) : (b)) |
72 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
210e752f KH |
73 | #define minmax(floor, val, ceil) \ |
74 | ((val) < (floor) ? (floor) : (val) > (ceil) ? (ceil) : (val)) | |
a2889657 JB |
75 | |
76 | /* The buffer position of the first character appearing | |
44fa5b1e JB |
77 | entirely or partially on the current frame line. |
78 | Or zero, which disables the optimization for the current frame line. */ | |
a2889657 JB |
79 | static int this_line_bufpos; |
80 | ||
81 | /* Number of characters past the end of this line, | |
82 | including the terminating newline */ | |
83 | static int this_line_endpos; | |
84 | ||
44fa5b1e | 85 | /* The vertical position of this frame line. */ |
a2889657 JB |
86 | static int this_line_vpos; |
87 | ||
44fa5b1e | 88 | /* Hpos value for start of display on this frame line. |
a2889657 JB |
89 | Usually zero, but negative if first character really began |
90 | on previous line */ | |
91 | static int this_line_start_hpos; | |
92 | ||
93 | /* Buffer that this_line variables are describing. */ | |
94 | static struct buffer *this_line_buffer; | |
95 | ||
a2889657 | 96 | /* Value of echo_area_glyphs when it was last acted on. |
44fa5b1e | 97 | If this is nonzero, there is a message on the frame |
a2889657 JB |
98 | in the minibuffer and it should be erased as soon |
99 | as it is no longer requested to appear. */ | |
100 | char *previous_echo_glyphs; | |
101 | ||
44fa5b1e | 102 | /* Nonzero means truncate lines in all windows less wide than the frame */ |
a2889657 JB |
103 | int truncate_partial_width_windows; |
104 | ||
d39b6696 KH |
105 | /* Nonzero means we have more than one non-minibuffer-only frame. |
106 | Not guaranteed to be accurate except while parsing frame-title-format. */ | |
107 | int multiple_frames; | |
108 | ||
a2889657 JB |
109 | Lisp_Object Vglobal_mode_string; |
110 | ||
111 | /* Marker for where to display an arrow on top of the buffer text. */ | |
112 | Lisp_Object Voverlay_arrow_position; | |
113 | ||
114 | /* String to display for the arrow. */ | |
115 | Lisp_Object Voverlay_arrow_string; | |
116 | ||
d45de95b RS |
117 | /* Values of those variables at last redisplay. |
118 | However, if Voverlay_arrow_position is a marker, | |
119 | last_arrow_position is its numerical position. */ | |
120 | static Lisp_Object last_arrow_position, last_arrow_string; | |
121 | ||
d39b6696 KH |
122 | /* Like mode-line-format, but for the titlebar on a visible frame. */ |
123 | Lisp_Object Vframe_title_format; | |
124 | ||
125 | /* Like mode-line-format, but for the titlebar on an iconified frame. */ | |
126 | Lisp_Object Vicon_title_format; | |
127 | ||
08b610e4 RS |
128 | /* List of functions to call when a window's size changes. These |
129 | functions get one arg, a frame on which one or more windows' sizes | |
130 | have changed. */ | |
131 | static Lisp_Object Vwindow_size_change_functions; | |
132 | ||
cf074754 RS |
133 | Lisp_Object Qmenu_bar_update_hook; |
134 | ||
a2889657 JB |
135 | /* Nonzero if overlay arrow has been displayed once in this window. */ |
136 | static int overlay_arrow_seen; | |
137 | ||
ca26e1c8 KH |
138 | /* Nonzero if visible end of buffer has already been displayed once |
139 | in this window. (We need this variable in case there are overlay | |
140 | strings that get displayed there.) */ | |
141 | static int zv_strings_seen; | |
142 | ||
fba9ce76 RS |
143 | /* Nonzero means highlight the region even in nonselected windows. */ |
144 | static int highlight_nonselected_windows; | |
145 | ||
44fa5b1e | 146 | /* If cursor motion alone moves point off frame, |
a2889657 | 147 | Try scrolling this many lines up or down if that will bring it back. */ |
14510fee | 148 | static int scroll_step; |
a2889657 | 149 | |
0789adb2 RS |
150 | /* Non-0 means scroll just far enough to bring point back on the screen, |
151 | when appropriate. */ | |
152 | static int scroll_conservatively; | |
153 | ||
9afd2168 RS |
154 | /* Recenter the window whenever point gets within this many lines |
155 | of the top or bottom of the window. */ | |
156 | int scroll_margin; | |
157 | ||
010494d0 KH |
158 | /* Number of characters of overlap to show, |
159 | when scrolling a one-line window such as a minibuffer. */ | |
160 | static int minibuffer_scroll_overlap; | |
161 | ||
a2889657 JB |
162 | /* Nonzero if try_window_id has made blank lines at window bottom |
163 | since the last redisplay that paused */ | |
164 | static int blank_end_of_window; | |
165 | ||
42640f83 RS |
166 | /* Number of windows showing the buffer of the selected window |
167 | (or another buffer with the same base buffer). | |
a2889657 JB |
168 | keyboard.c refers to this. */ |
169 | int buffer_shared; | |
170 | ||
44fa5b1e | 171 | /* display_text_line sets these to the frame position (origin 0) of point, |
a2889657 JB |
172 | whether the window is selected or not. |
173 | Set one to -1 first to determine whether point was found afterwards. */ | |
174 | ||
175 | static int cursor_vpos; | |
176 | static int cursor_hpos; | |
177 | ||
14510fee | 178 | static int debug_end_pos; |
a2889657 JB |
179 | |
180 | /* Nonzero means display mode line highlighted */ | |
181 | int mode_line_inverse_video; | |
182 | ||
e9874cee | 183 | static void redisplay_internal (); |
ff6c30e5 | 184 | static int message_log_check_duplicate (); |
a2889657 JB |
185 | static void echo_area_display (); |
186 | void mark_window_display_accurate (); | |
187 | static void redisplay_windows (); | |
188 | static void redisplay_window (); | |
90adcf20 | 189 | static void update_menu_bar (); |
a2889657 JB |
190 | static void try_window (); |
191 | static int try_window_id (); | |
192 | static struct position *display_text_line (); | |
193 | static void display_mode_line (); | |
194 | static int display_mode_element (); | |
a2889657 JB |
195 | static char *decode_mode_spec (); |
196 | static int display_string (); | |
7ce2c095 | 197 | static void display_menu_bar (); |
aa6d10fa | 198 | static int display_count_lines (); |
a2889657 JB |
199 | |
200 | /* Prompt to display in front of the minibuffer contents */ | |
8c5b6a0a | 201 | Lisp_Object minibuf_prompt; |
a2889657 JB |
202 | |
203 | /* Width in columns of current minibuffer prompt. */ | |
204 | int minibuf_prompt_width; | |
205 | ||
206 | /* Message to display instead of minibuffer contents | |
207 | This is what the functions error and message make, | |
208 | and command echoing uses it as well. | |
209 | It overrides the minibuf_prompt as well as the buffer. */ | |
210 | char *echo_area_glyphs; | |
211 | ||
90adcf20 RS |
212 | /* This is the length of the message in echo_area_glyphs. */ |
213 | int echo_area_glyphs_length; | |
214 | ||
73af359d RS |
215 | /* This is the window where the echo area message was displayed. |
216 | It is always a minibuffer window, but it may not be the | |
217 | same window currently active as a minibuffer. */ | |
218 | Lisp_Object echo_area_window; | |
219 | ||
a3788d53 RS |
220 | /* Nonzero means multibyte characters were enabled when the echo area |
221 | message was specified. */ | |
222 | int message_enable_multibyte; | |
223 | ||
a2889657 JB |
224 | /* true iff we should redraw the mode lines on the next redisplay */ |
225 | int update_mode_lines; | |
226 | ||
227 | /* Smallest number of characters before the gap | |
228 | at any time since last redisplay that finished. | |
229 | Valid for current buffer when try_window_id can be called. */ | |
230 | int beg_unchanged; | |
231 | ||
232 | /* Smallest number of characters after the gap | |
233 | at any time since last redisplay that finished. | |
234 | Valid for current buffer when try_window_id can be called. */ | |
235 | int end_unchanged; | |
236 | ||
237 | /* MODIFF as of last redisplay that finished; | |
8850a573 RS |
238 | if it matches MODIFF, and overlay_unchanged_modified |
239 | matches OVERLAY_MODIFF, that means beg_unchanged and end_unchanged | |
a2889657 JB |
240 | contain no useful information */ |
241 | int unchanged_modified; | |
242 | ||
8850a573 RS |
243 | /* OVERLAY_MODIFF as of last redisplay that finished. */ |
244 | int overlay_unchanged_modified; | |
245 | ||
a2889657 JB |
246 | /* Nonzero if window sizes or contents have changed |
247 | since last redisplay that finished */ | |
248 | int windows_or_buffers_changed; | |
249 | ||
aa6d10fa RS |
250 | /* Nonzero after display_mode_line if %l was used |
251 | and it displayed a line number. */ | |
252 | int line_number_displayed; | |
253 | ||
254 | /* Maximum buffer size for which to display line numbers. */ | |
14510fee | 255 | static int line_number_display_limit; |
5992c4f7 KH |
256 | |
257 | /* Number of lines to keep in the message log buffer. | |
258 | t means infinite. nil means don't log at all. */ | |
259 | Lisp_Object Vmessage_log_max; | |
d45de95b RS |
260 | |
261 | #define COERCE_MARKER(X) \ | |
377dbd97 | 262 | (MARKERP ((X)) ? Fmarker_position (X) : (X)) |
12adba34 RS |
263 | |
264 | static int pos_tab_offset P_ ((struct window *, int, int)); | |
a2889657 | 265 | \f |
1adc55de RS |
266 | /* Output a newline in the *Messages* buffer if "needs" one. */ |
267 | ||
3c6595e0 KH |
268 | void |
269 | message_log_maybe_newline () | |
270 | { | |
271 | if (message_log_need_newline) | |
0a9dc68b | 272 | message_dolog ("", 0, 1, 0); |
3c6595e0 KH |
273 | } |
274 | ||
275 | ||
d917be71 KH |
276 | /* Add a string to the message log, optionally terminated with a newline. |
277 | This function calls low-level routines in order to bypass text property | |
0a9dc68b RS |
278 | hooks, etc. which might not be safe to run. |
279 | MULTIBYTE, if nonzero, means interpret the contents of M as multibyte. */ | |
90adcf20 RS |
280 | |
281 | void | |
0a9dc68b | 282 | message_dolog (m, len, nlflag, multibyte) |
90adcf20 | 283 | char *m; |
0a9dc68b | 284 | int len, nlflag, multibyte; |
5992c4f7 | 285 | { |
f88eb0b6 | 286 | if (!NILP (Vmessage_log_max)) |
5992c4f7 KH |
287 | { |
288 | struct buffer *oldbuf; | |
12adba34 | 289 | Lisp_Object oldpoint, oldbegv, oldzv; |
69f033ab | 290 | int old_windows_or_buffers_changed = windows_or_buffers_changed; |
bab29e15 RS |
291 | int point_at_end = 0; |
292 | int zv_at_end = 0; | |
84dd0ae5 | 293 | Lisp_Object old_deactivate_mark; |
5992c4f7 | 294 | |
84dd0ae5 | 295 | old_deactivate_mark = Vdeactivate_mark; |
5992c4f7 | 296 | oldbuf = current_buffer; |
3c6595e0 | 297 | Fset_buffer (Fget_buffer_create (build_string ("*Messages*"))); |
16c300fb | 298 | current_buffer->undo_list = Qt; |
12adba34 RS |
299 | |
300 | oldpoint = Fpoint_marker (); | |
301 | oldbegv = Fpoint_min_marker (); | |
302 | oldzv = Fpoint_max_marker (); | |
303 | ||
6f0429a9 | 304 | if (PT == Z) |
bab29e15 | 305 | point_at_end = 1; |
6f0429a9 | 306 | if (ZV == Z) |
bab29e15 | 307 | zv_at_end = 1; |
12adba34 RS |
308 | |
309 | BEGV = BEG; | |
310 | BEGV_BYTE = BEG_BYTE; | |
311 | ZV = Z; | |
312 | ZV_BYTE = Z_BYTE; | |
313 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
bab29e15 RS |
314 | |
315 | /* Insert the string--maybe converting multibyte to single byte | |
316 | or vice versa, so that all the text fits the buffer. */ | |
0a9dc68b | 317 | if (multibyte |
bab29e15 RS |
318 | && NILP (current_buffer->enable_multibyte_characters)) |
319 | { | |
320 | int c, i = 0, nbytes; | |
321 | /* Convert a multibyte string to single-byte | |
322 | for the *Message* buffer. */ | |
323 | while (i < len) | |
324 | { | |
325 | c = STRING_CHAR (m + i, len - i); | |
326 | i += XFASTINT (Fchar_bytes (make_number (c))); | |
327 | /* Truncate the character to its last byte--we can only hope | |
328 | the user is happy with the character he gets, | |
329 | since if it isn't right, there is no way to do it right. */ | |
330 | c &= 0xff; | |
331 | insert_char (c); | |
332 | } | |
333 | } | |
0a9dc68b | 334 | else if (! multibyte |
bab29e15 RS |
335 | && ! NILP (current_buffer->enable_multibyte_characters)) |
336 | { | |
6f0429a9 | 337 | int i = 0; |
bd4f53cc | 338 | unsigned char *msg = (unsigned char *) m; |
bab29e15 RS |
339 | /* Convert a single-byte string to multibyte |
340 | for the *Message* buffer. */ | |
341 | while (i < len) | |
342 | { | |
bd4f53cc | 343 | int c = unibyte_char_to_multibyte (msg[i++]); |
bab29e15 RS |
344 | insert_char (c); |
345 | } | |
346 | } | |
347 | else if (len) | |
12adba34 | 348 | insert_1 (m, len, 1, 0, 0); |
bab29e15 | 349 | |
f88eb0b6 | 350 | if (nlflag) |
5992c4f7 | 351 | { |
12adba34 RS |
352 | int this_bol, this_bol_byte, prev_bol, prev_bol_byte, dup; |
353 | insert_1 ("\n", 1, 1, 0, 0); | |
354 | ||
355 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, -2, 0); | |
356 | this_bol = PT; | |
357 | this_bol_byte = PT_BYTE; | |
ff6c30e5 | 358 | |
ff6c30e5 KH |
359 | if (this_bol > BEG) |
360 | { | |
6f0429a9 | 361 | scan_newline (PT, PT_BYTE, BEG, BEG_BYTE, -2, 0); |
12adba34 RS |
362 | prev_bol = PT; |
363 | prev_bol_byte = PT_BYTE; | |
364 | ||
2d3ae3f0 KH |
365 | dup = message_log_check_duplicate (prev_bol, prev_bol_byte, |
366 | this_bol, this_bol_byte); | |
ff6c30e5 KH |
367 | if (dup) |
368 | { | |
bc69581b KH |
369 | del_range_both (prev_bol, prev_bol_byte, |
370 | this_bol, this_bol_byte, 0); | |
ff6c30e5 KH |
371 | if (dup > 1) |
372 | { | |
373 | char dupstr[40]; | |
374 | int duplen; | |
375 | ||
376 | /* If you change this format, don't forget to also | |
377 | change message_log_check_duplicate. */ | |
378 | sprintf (dupstr, " [%d times]", dup); | |
379 | duplen = strlen (dupstr); | |
12adba34 RS |
380 | TEMP_SET_PT_BOTH (Z - 1, Z_BYTE - 1); |
381 | insert_1 (dupstr, duplen, 1, 0, 1); | |
ff6c30e5 KH |
382 | } |
383 | } | |
384 | } | |
385 | ||
386 | if (NATNUMP (Vmessage_log_max)) | |
387 | { | |
12adba34 RS |
388 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, |
389 | -XFASTINT (Vmessage_log_max) - 1, 0); | |
bc69581b | 390 | del_range_both (BEG, BEG_BYTE, PT, PT_BYTE, 0); |
ff6c30e5 | 391 | } |
5992c4f7 | 392 | } |
12adba34 RS |
393 | BEGV = XMARKER (oldbegv)->charpos; |
394 | BEGV_BYTE = marker_byte_position (oldbegv); | |
395 | ||
bab29e15 | 396 | if (zv_at_end) |
12adba34 RS |
397 | { |
398 | ZV = Z; | |
399 | ZV_BYTE = Z_BYTE; | |
400 | } | |
bab29e15 | 401 | else |
12adba34 RS |
402 | { |
403 | ZV = XMARKER (oldzv)->charpos; | |
404 | ZV_BYTE = marker_byte_position (oldzv); | |
405 | } | |
406 | ||
bab29e15 | 407 | if (point_at_end) |
12adba34 | 408 | TEMP_SET_PT_BOTH (Z, Z_BYTE); |
bab29e15 | 409 | else |
12adba34 RS |
410 | Fgoto_char (oldpoint); |
411 | ||
412 | free_marker (oldpoint); | |
413 | free_marker (oldbegv); | |
414 | free_marker (oldzv); | |
415 | ||
5992c4f7 | 416 | set_buffer_internal (oldbuf); |
69f033ab | 417 | windows_or_buffers_changed = old_windows_or_buffers_changed; |
3c6595e0 | 418 | message_log_need_newline = !nlflag; |
84dd0ae5 | 419 | Vdeactivate_mark = old_deactivate_mark; |
5992c4f7 | 420 | } |
f88eb0b6 KH |
421 | } |
422 | ||
ff6c30e5 KH |
423 | /* We are at the end of the buffer after just having inserted a newline. |
424 | (Note: We depend on the fact we won't be crossing the gap.) | |
425 | Check to see if the most recent message looks a lot like the previous one. | |
426 | Return 0 if different, 1 if the new one should just replace it, or a | |
427 | value N > 1 if we should also append " [N times]". */ | |
f82aff7c | 428 | |
ff6c30e5 | 429 | static int |
12adba34 | 430 | message_log_check_duplicate (prev_bol, prev_bol_byte, this_bol, this_bol_byte) |
ff6c30e5 | 431 | int prev_bol, this_bol; |
12adba34 | 432 | int prev_bol_byte, this_bol_byte; |
ff6c30e5 KH |
433 | { |
434 | int i; | |
435 | int len = Z - 1 - this_bol; | |
436 | int seen_dots = 0; | |
12adba34 RS |
437 | unsigned char *p1 = BUF_BYTE_ADDRESS (current_buffer, prev_bol_byte); |
438 | unsigned char *p2 = BUF_BYTE_ADDRESS (current_buffer, this_bol_byte); | |
ff6c30e5 KH |
439 | |
440 | for (i = 0; i < len; i++) | |
441 | { | |
442 | if (i >= 3 && p1[i-3] == '.' && p1[i-2] == '.' && p1[i-1] == '.' | |
443 | && p1[i] != '\n') | |
444 | seen_dots = 1; | |
445 | if (p1[i] != p2[i]) | |
446 | return seen_dots; | |
447 | } | |
448 | p1 += len; | |
449 | if (*p1 == '\n') | |
450 | return 2; | |
451 | if (*p1++ == ' ' && *p1++ == '[') | |
452 | { | |
453 | int n = 0; | |
454 | while (*p1 >= '0' && *p1 <= '9') | |
455 | n = n * 10 + *p1++ - '0'; | |
456 | if (strncmp (p1, " times]\n", 8) == 0) | |
457 | return n+1; | |
458 | } | |
459 | return 0; | |
460 | } | |
1adc55de | 461 | \f |
f88eb0b6 | 462 | /* Display an echo area message M with a specified length of LEN chars. |
1adc55de | 463 | The string may include null characters. If M is 0, clear out any |
f88eb0b6 | 464 | existing message, and let the minibuffer text show through. |
1adc55de RS |
465 | |
466 | The buffer M must continue to exist until after the echo area | |
467 | gets cleared or some other message gets displayed there. | |
468 | ||
469 | Do not pass text that is stored in a Lisp string. | |
470 | Do not pass text in a buffer that was alloca'd. */ | |
f88eb0b6 KH |
471 | |
472 | void | |
0a9dc68b | 473 | message2 (m, len, multibyte) |
f88eb0b6 KH |
474 | char *m; |
475 | int len; | |
0a9dc68b | 476 | int multibyte; |
f88eb0b6 KH |
477 | { |
478 | /* First flush out any partial line written with print. */ | |
3c6595e0 | 479 | message_log_maybe_newline (); |
f88eb0b6 | 480 | if (m) |
0a9dc68b RS |
481 | message_dolog (m, len, 1, multibyte); |
482 | message2_nolog (m, len, multibyte); | |
5992c4f7 KH |
483 | } |
484 | ||
485 | ||
1adc55de | 486 | /* The non-logging counterpart of message2. */ |
5992c4f7 KH |
487 | |
488 | void | |
44461111 | 489 | message2_nolog (m, len, multibyte) |
5992c4f7 KH |
490 | char *m; |
491 | int len; | |
90adcf20 | 492 | { |
44461111 | 493 | message_enable_multibyte = multibyte; |
a3788d53 | 494 | |
90adcf20 RS |
495 | if (noninteractive) |
496 | { | |
497 | if (noninteractive_need_newline) | |
498 | putc ('\n', stderr); | |
499 | noninteractive_need_newline = 0; | |
c3597849 RS |
500 | if (m) |
501 | fwrite (m, len, 1, stderr); | |
90adcf20 RS |
502 | if (cursor_in_echo_area == 0) |
503 | fprintf (stderr, "\n"); | |
504 | fflush (stderr); | |
505 | } | |
506 | /* A null message buffer means that the frame hasn't really been | |
507 | initialized yet. Error messages get reported properly by | |
508 | cmd_error, so this must be just an informative message; toss it. */ | |
509 | else if (INTERACTIVE && FRAME_MESSAGE_BUF (selected_frame)) | |
510 | { | |
73af359d RS |
511 | Lisp_Object mini_window; |
512 | FRAME_PTR f; | |
90adcf20 | 513 | |
73af359d RS |
514 | /* Get the frame containing the minibuffer |
515 | that the selected frame is using. */ | |
516 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
517 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
518 | ||
73af359d | 519 | FRAME_SAMPLE_VISIBILITY (f); |
90adcf20 | 520 | if (FRAME_VISIBLE_P (selected_frame) |
73af359d RS |
521 | && ! FRAME_VISIBLE_P (f)) |
522 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window))); | |
90adcf20 RS |
523 | |
524 | if (m) | |
525 | { | |
526 | echo_area_glyphs = m; | |
527 | echo_area_glyphs_length = len; | |
b6436d4e RS |
528 | |
529 | if (minibuffer_auto_raise) | |
530 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); | |
90adcf20 | 531 | } |
ded34426 JB |
532 | else |
533 | echo_area_glyphs = previous_echo_glyphs = 0; | |
534 | ||
535 | do_pending_window_change (); | |
536 | echo_area_display (); | |
73af359d | 537 | update_frame (f, 1, 1); |
ded34426 | 538 | do_pending_window_change (); |
853cf346 | 539 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
73af359d | 540 | (*frame_up_to_date_hook) (f); |
ded34426 JB |
541 | } |
542 | } | |
1adc55de | 543 | \f |
0a9dc68b RS |
544 | /* Display in echo area the null-terminated ASCII-only string M. |
545 | If M is 0, clear out any existing message, | |
546 | and let the minibuffer text show through. | |
1adc55de | 547 | |
0a9dc68b | 548 | The string M must continue to exist until after the echo area |
1adc55de RS |
549 | gets cleared or some other message gets displayed there. |
550 | ||
551 | Do not pass text that is stored in a Lisp string. | |
552 | Do not pass text in a buffer that was alloca'd. */ | |
ded34426 | 553 | |
48ae5f0a KH |
554 | void |
555 | message1 (m) | |
556 | char *m; | |
557 | { | |
0a9dc68b | 558 | message2 (m, (m ? strlen (m) : 0), 0); |
48ae5f0a KH |
559 | } |
560 | ||
0b1005ef KH |
561 | void |
562 | message1_nolog (m) | |
563 | char *m; | |
564 | { | |
0a9dc68b RS |
565 | message2_nolog (m, (m ? strlen (m) : 0), 0); |
566 | } | |
567 | ||
568 | /* Display a message M which contains a single %s | |
569 | which gets replaced with STRING. */ | |
570 | ||
571 | void | |
572 | message_with_string (m, string, log) | |
573 | char *m; | |
574 | Lisp_Object string; | |
575 | int log; | |
576 | { | |
577 | if (noninteractive) | |
578 | { | |
579 | if (m) | |
580 | { | |
581 | if (noninteractive_need_newline) | |
582 | putc ('\n', stderr); | |
583 | noninteractive_need_newline = 0; | |
584 | fprintf (stderr, m, XSTRING (string)->data); | |
585 | if (cursor_in_echo_area == 0) | |
586 | fprintf (stderr, "\n"); | |
587 | fflush (stderr); | |
588 | } | |
589 | } | |
590 | else if (INTERACTIVE) | |
591 | { | |
592 | /* The frame whose minibuffer we're going to display the message on. | |
593 | It may be larger than the selected frame, so we need | |
594 | to use its buffer, not the selected frame's buffer. */ | |
595 | Lisp_Object mini_window; | |
596 | FRAME_PTR f; | |
597 | ||
598 | /* Get the frame containing the minibuffer | |
599 | that the selected frame is using. */ | |
600 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
601 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
602 | ||
603 | /* A null message buffer means that the frame hasn't really been | |
604 | initialized yet. Error messages get reported properly by | |
605 | cmd_error, so this must be just an informative message; toss it. */ | |
606 | if (FRAME_MESSAGE_BUF (f)) | |
607 | { | |
608 | int len; | |
609 | char *a[1]; | |
610 | a[0] = (char *) XSTRING (string)->data; | |
611 | ||
612 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
613 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); | |
614 | ||
615 | if (log) | |
616 | message2 (FRAME_MESSAGE_BUF (f), len, | |
617 | STRING_MULTIBYTE (string)); | |
618 | else | |
619 | message2_nolog (FRAME_MESSAGE_BUF (f), len, | |
620 | STRING_MULTIBYTE (string)); | |
621 | ||
622 | /* Print should start at the beginning of the message | |
623 | buffer next time. */ | |
624 | message_buf_print = 0; | |
625 | } | |
626 | } | |
0b1005ef KH |
627 | } |
628 | ||
76412d64 RS |
629 | /* Truncate what will be displayed in the echo area |
630 | the next time we display it--but don't redisplay it now. */ | |
631 | ||
632 | void | |
633 | truncate_echo_area (len) | |
634 | int len; | |
635 | { | |
636 | /* A null message buffer means that the frame hasn't really been | |
637 | initialized yet. Error messages get reported properly by | |
638 | cmd_error, so this must be just an informative message; toss it. */ | |
639 | if (!noninteractive && INTERACTIVE && FRAME_MESSAGE_BUF (selected_frame)) | |
640 | echo_area_glyphs_length = len; | |
641 | } | |
642 | ||
44fa5b1e | 643 | /* Nonzero if FRAME_MESSAGE_BUF (selected_frame) is being used by print; |
9c74a0dd JB |
644 | zero if being used by message. */ |
645 | int message_buf_print; | |
646 | ||
1adc55de | 647 | /* Dump an informative message to the minibuf. If M is 0, clear out |
81d478f3 | 648 | any existing message, and let the minibuffer text show through. */ |
1adc55de | 649 | |
a2889657 | 650 | /* VARARGS 1 */ |
a2889657 JB |
651 | void |
652 | message (m, a1, a2, a3) | |
653 | char *m; | |
5d5ed907 | 654 | EMACS_INT a1, a2, a3; |
a2889657 JB |
655 | { |
656 | if (noninteractive) | |
657 | { | |
81d478f3 JB |
658 | if (m) |
659 | { | |
660 | if (noninteractive_need_newline) | |
661 | putc ('\n', stderr); | |
662 | noninteractive_need_newline = 0; | |
663 | fprintf (stderr, m, a1, a2, a3); | |
c4f14ccb RS |
664 | if (cursor_in_echo_area == 0) |
665 | fprintf (stderr, "\n"); | |
81d478f3 JB |
666 | fflush (stderr); |
667 | } | |
a2889657 | 668 | } |
1f40cad2 | 669 | else if (INTERACTIVE) |
a2889657 | 670 | { |
1f40cad2 JB |
671 | /* The frame whose minibuffer we're going to display the message on. |
672 | It may be larger than the selected frame, so we need | |
673 | to use its buffer, not the selected frame's buffer. */ | |
73af359d RS |
674 | Lisp_Object mini_window; |
675 | FRAME_PTR f; | |
676 | ||
677 | /* Get the frame containing the minibuffer | |
678 | that the selected frame is using. */ | |
679 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
680 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
1f40cad2 JB |
681 | |
682 | /* A null message buffer means that the frame hasn't really been | |
683 | initialized yet. Error messages get reported properly by | |
684 | cmd_error, so this must be just an informative message; toss it. */ | |
73af359d | 685 | if (FRAME_MESSAGE_BUF (f)) |
81d478f3 | 686 | { |
1f40cad2 JB |
687 | if (m) |
688 | { | |
90adcf20 | 689 | int len; |
a2889657 | 690 | #ifdef NO_ARG_ARRAY |
d5315282 AS |
691 | char *a[3]; |
692 | a[0] = (char *) a1; | |
693 | a[1] = (char *) a2; | |
694 | a[2] = (char *) a3; | |
a2889657 | 695 | |
73af359d | 696 | len = doprnt (FRAME_MESSAGE_BUF (f), |
1c9241f5 | 697 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); |
a2889657 | 698 | #else |
73af359d | 699 | len = doprnt (FRAME_MESSAGE_BUF (f), |
12adba34 RS |
700 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, |
701 | (char **) &a1); | |
1f40cad2 | 702 | #endif /* NO_ARG_ARRAY */ |
1f40cad2 | 703 | |
0a9dc68b | 704 | message2 (FRAME_MESSAGE_BUF (f), len, 0); |
1f40cad2 JB |
705 | } |
706 | else | |
707 | message1 (0); | |
708 | ||
709 | /* Print should start at the beginning of the message | |
710 | buffer next time. */ | |
711 | message_buf_print = 0; | |
81d478f3 | 712 | } |
a2889657 JB |
713 | } |
714 | } | |
715 | ||
1adc55de | 716 | /* The non-logging version of message. */ |
6c4429a5 KH |
717 | void |
718 | message_nolog (m, a1, a2, a3) | |
719 | char *m; | |
720 | EMACS_INT a1, a2, a3; | |
721 | { | |
722 | Lisp_Object old_log_max; | |
723 | old_log_max = Vmessage_log_max; | |
724 | Vmessage_log_max = Qnil; | |
725 | message (m, a1, a2, a3); | |
726 | Vmessage_log_max = old_log_max; | |
727 | } | |
728 | ||
131f2133 RS |
729 | void |
730 | update_echo_area () | |
731 | { | |
0a9dc68b RS |
732 | message2 (echo_area_glyphs, echo_area_glyphs_length, |
733 | ! NILP (current_buffer->enable_multibyte_characters)); | |
131f2133 | 734 | } |
1adc55de | 735 | \f |
a2889657 JB |
736 | static void |
737 | echo_area_display () | |
738 | { | |
739 | register int vpos; | |
44fa5b1e | 740 | FRAME_PTR f; |
73af359d | 741 | Lisp_Object mini_window; |
a2889657 | 742 | |
73af359d RS |
743 | /* Choose the minibuffer window for this display. |
744 | It is the minibuffer window used by the selected frame. */ | |
745 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
746 | /* This is the frame that window is in. */ | |
747 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
a2889657 | 748 | |
44fa5b1e | 749 | if (! FRAME_VISIBLE_P (f)) |
a2889657 | 750 | return; |
a2889657 | 751 | |
44fa5b1e | 752 | if (frame_garbaged) |
a2889657 | 753 | { |
02a9b6e4 | 754 | redraw_garbaged_frames (); |
44fa5b1e | 755 | frame_garbaged = 0; |
a2889657 JB |
756 | } |
757 | ||
758 | if (echo_area_glyphs || minibuf_level == 0) | |
759 | { | |
a2f016e3 RS |
760 | int i; |
761 | ||
73af359d RS |
762 | echo_area_window = mini_window; |
763 | ||
764 | vpos = XFASTINT (XWINDOW (mini_window)->top); | |
44fa5b1e | 765 | get_display_line (f, vpos, 0); |
a2f016e3 RS |
766 | |
767 | /* Make sure the columns that overlap a left-hand scroll bar | |
768 | are always clear. */ | |
769 | for (i = 0; i < FRAME_LEFT_SCROLL_BAR_WIDTH (f); i++) | |
770 | f->desired_glyphs->glyphs[vpos][i] = SPACEGLYPH; | |
771 | ||
73af359d | 772 | display_string (XWINDOW (mini_window), vpos, |
a2889657 | 773 | echo_area_glyphs ? echo_area_glyphs : "", |
90adcf20 | 774 | echo_area_glyphs ? echo_area_glyphs_length : -1, |
73f194f1 | 775 | FRAME_LEFT_SCROLL_BAR_WIDTH (f), |
21e989e3 | 776 | 0, 0, 0, |
a3788d53 RS |
777 | FRAME_WIDTH (f) + FRAME_LEFT_SCROLL_BAR_WIDTH (f), |
778 | message_enable_multibyte); | |
a2889657 | 779 | |
b6f0fe04 | 780 | #if 0 /* This just gets in the way. update_frame does the job. */ |
a2889657 | 781 | /* If desired cursor location is on this line, put it at end of text */ |
b5bbc9a5 KH |
782 | if (cursor_in_echo_area) |
783 | FRAME_CURSOR_Y (f) = vpos; | |
44fa5b1e JB |
784 | if (FRAME_CURSOR_Y (f) == vpos) |
785 | FRAME_CURSOR_X (f) = FRAME_DESIRED_GLYPHS (f)->used[vpos]; | |
b6f0fe04 | 786 | #endif |
daa37602 JB |
787 | |
788 | /* Fill the rest of the minibuffer window with blank lines. */ | |
789 | { | |
790 | int i; | |
791 | ||
b2a76982 | 792 | for (i = vpos + 1; |
73af359d | 793 | i < vpos + XFASTINT (XWINDOW (mini_window)->height); i++) |
daa37602 | 794 | { |
44fa5b1e | 795 | get_display_line (f, i, 0); |
b8333774 RS |
796 | /* We don't use FRAME_SCROLL_BAR_WIDTH (f) as the starting |
797 | hpos, because it is good to clear whatever is behind the | |
798 | scroll bar. This does not affect the scroll bar itself. */ | |
e88dcae1 | 799 | display_string (XWINDOW (mini_window), i, |
73f194f1 | 800 | "", 0, |
b8333774 | 801 | 0, 0, 0, |
a3788d53 RS |
802 | 0, FRAME_WIDTH (f) + FRAME_SCROLL_BAR_WIDTH (f), |
803 | 0); | |
daa37602 JB |
804 | } |
805 | } | |
a2889657 | 806 | } |
73af359d | 807 | else if (!EQ (mini_window, selected_window)) |
a2889657 JB |
808 | windows_or_buffers_changed++; |
809 | ||
73af359d | 810 | if (EQ (mini_window, selected_window)) |
a2889657 JB |
811 | this_line_bufpos = 0; |
812 | ||
813 | previous_echo_glyphs = echo_area_glyphs; | |
814 | } | |
1adc55de RS |
815 | \f |
816 | /* Update frame titles. */ | |
96a410bc | 817 | |
8f3343d0 | 818 | #ifdef HAVE_WINDOW_SYSTEM |
d39b6696 KH |
819 | static char frame_title_buf[512]; |
820 | static char *frame_title_ptr; | |
96a410bc | 821 | |
d39b6696 KH |
822 | static int |
823 | store_frame_title (str, mincol, maxcol) | |
824 | char *str; | |
825 | int mincol, maxcol; | |
826 | { | |
827 | char *limit; | |
828 | if (maxcol < 0 || maxcol >= sizeof(frame_title_buf)) | |
829 | maxcol = sizeof (frame_title_buf); | |
830 | limit = &frame_title_buf[maxcol]; | |
831 | while (*str != '\0' && frame_title_ptr < limit) | |
832 | *frame_title_ptr++ = *str++; | |
833 | while (frame_title_ptr < &frame_title_buf[mincol]) | |
834 | *frame_title_ptr++ = ' '; | |
835 | return frame_title_ptr - frame_title_buf; | |
836 | } | |
96a410bc | 837 | |
96a410bc KH |
838 | static void |
839 | x_consider_frame_title (frame) | |
840 | Lisp_Object frame; | |
841 | { | |
d39b6696 KH |
842 | Lisp_Object fmt; |
843 | struct buffer *obuf; | |
844 | int len; | |
96a410bc KH |
845 | FRAME_PTR f = XFRAME (frame); |
846 | ||
8f3343d0 | 847 | if (!(FRAME_WINDOW_P (f) || FRAME_MINIBUF_ONLY_P (f) || f->explicit_name)) |
d39b6696 | 848 | return; |
3450d04c KH |
849 | |
850 | /* Do we have more than one visible frame on this X display? */ | |
851 | { | |
852 | Lisp_Object tail; | |
853 | ||
854 | for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr) | |
855 | { | |
856 | FRAME_PTR tf = XFRAME (XCONS (tail)->car); | |
857 | ||
c9492f08 KH |
858 | if (tf != f && FRAME_KBOARD (tf) == FRAME_KBOARD (f) |
859 | && !FRAME_MINIBUF_ONLY_P (tf) | |
3450d04c KH |
860 | && (FRAME_VISIBLE_P (tf) || FRAME_ICONIFIED_P (tf))) |
861 | break; | |
862 | } | |
863 | ||
864 | multiple_frames = CONSP (tail); | |
865 | } | |
866 | ||
d39b6696 KH |
867 | obuf = current_buffer; |
868 | Fset_buffer (XWINDOW (f->selected_window)->buffer); | |
869 | fmt = (FRAME_ICONIFIED_P (f) ? Vicon_title_format : Vframe_title_format); | |
870 | frame_title_ptr = frame_title_buf; | |
871 | len = display_mode_element (XWINDOW (f->selected_window), 0, 0, 0, | |
872 | 0, sizeof (frame_title_buf), fmt); | |
873 | frame_title_ptr = 0; | |
874 | set_buffer_internal (obuf); | |
875 | /* Set the name only if it's changed. This avoids consing | |
876 | in the common case where it hasn't. (If it turns out that we've | |
877 | already wasted too much time by walking through the list with | |
878 | display_mode_element, then we might need to optimize at a higher | |
879 | level than this.) */ | |
fc932ac6 | 880 | if (! STRINGP (f->name) || STRING_BYTES (XSTRING (f->name)) != len |
d39b6696 KH |
881 | || bcmp (frame_title_buf, XSTRING (f->name)->data, len) != 0) |
882 | x_implicitly_set_name (f, make_string (frame_title_buf, len), Qnil); | |
96a410bc | 883 | } |
c7c9ca97 KH |
884 | #else |
885 | #define frame_title_ptr ((char *)0) | |
e39322d9 | 886 | #define store_frame_title(str, mincol, maxcol) 0 |
96a410bc | 887 | #endif |
a2889657 | 888 | \f |
90adcf20 | 889 | /* Prepare for redisplay by updating menu-bar item lists when appropriate. |
87382820 | 890 | This can call eval. */ |
90adcf20 RS |
891 | |
892 | void | |
893 | prepare_menu_bars () | |
894 | { | |
895 | register struct window *w = XWINDOW (selected_window); | |
896 | int all_windows; | |
08b610e4 | 897 | struct gcpro gcpro1, gcpro2; |
90adcf20 | 898 | |
ecf7de9b | 899 | all_windows = (update_mode_lines || buffer_shared > 1 |
28995e67 | 900 | || windows_or_buffers_changed); |
90adcf20 | 901 | |
feb0c42f KH |
902 | /* Update all frame titles based on their buffer names, etc. |
903 | We do this before the menu bars so that the buffer-menu | |
904 | will show the up-to-date frame titles. | |
905 | ||
906 | This used to be done after the menu bars, for a reason that | |
907 | was stated as follows but which I do not understand: | |
908 | "We do this after the menu bars so that the frame will first | |
909 | create its menu bar using the name `emacs' if no other name | |
910 | has yet been specified." | |
911 | I think that is no longer a concern. */ | |
8f3343d0 | 912 | #ifdef HAVE_WINDOW_SYSTEM |
d3f46cff | 913 | if (windows_or_buffers_changed || update_mode_lines) |
feb0c42f KH |
914 | { |
915 | Lisp_Object tail, frame; | |
916 | ||
917 | FOR_EACH_FRAME (tail, frame) | |
918 | if (FRAME_VISIBLE_P (XFRAME (frame)) | |
919 | || FRAME_ICONIFIED_P (XFRAME (frame))) | |
920 | x_consider_frame_title (frame); | |
921 | } | |
922 | #endif | |
923 | ||
90adcf20 RS |
924 | /* Update the menu bar item lists, if appropriate. |
925 | This has to be done before any actual redisplay | |
926 | or generation of display lines. */ | |
927 | if (all_windows) | |
928 | { | |
929 | Lisp_Object tail, frame; | |
a2725ab2 RS |
930 | int count = specpdl_ptr - specpdl; |
931 | ||
84dd0ae5 | 932 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); |
90adcf20 RS |
933 | |
934 | FOR_EACH_FRAME (tail, frame) | |
08b610e4 RS |
935 | { |
936 | /* If a window on this frame changed size, | |
937 | report that to the user and clear the size-change flag. */ | |
938 | if (FRAME_WINDOW_SIZES_CHANGED (XFRAME (frame))) | |
939 | { | |
940 | Lisp_Object functions; | |
14510fee RS |
941 | /* Clear flag first in case we get error below. */ |
942 | FRAME_WINDOW_SIZES_CHANGED (XFRAME (frame)) = 0; | |
08b610e4 RS |
943 | functions = Vwindow_size_change_functions; |
944 | GCPRO2 (tail, functions); | |
945 | while (CONSP (functions)) | |
946 | { | |
947 | call1 (XCONS (functions)->car, frame); | |
948 | functions = XCONS (functions)->cdr; | |
949 | } | |
950 | UNGCPRO; | |
08b610e4 RS |
951 | } |
952 | GCPRO1 (tail); | |
a2725ab2 | 953 | update_menu_bar (XFRAME (frame), 0); |
08b610e4 RS |
954 | UNGCPRO; |
955 | } | |
a2725ab2 RS |
956 | |
957 | unbind_to (count, Qnil); | |
90adcf20 | 958 | } |
ecf7de9b | 959 | else |
a2725ab2 | 960 | update_menu_bar (selected_frame, 1); |
cd6dfed6 RS |
961 | |
962 | /* Motif needs this. See comment in xmenu.c. | |
963 | Turn it off when pending_menu_activation is not defined. */ | |
964 | #ifdef USE_X_TOOLKIT | |
965 | pending_menu_activation = 0; | |
966 | #endif | |
90adcf20 RS |
967 | } |
968 | \f | |
44fa5b1e | 969 | /* Do a frame update, taking possible shortcuts into account. |
a2889657 JB |
970 | This is the main external entry point for redisplay. |
971 | ||
972 | If the last redisplay displayed an echo area message and that | |
973 | message is no longer requested, we clear the echo area | |
974 | or bring back the minibuffer if that is in use. | |
975 | ||
90adcf20 RS |
976 | Do not call eval from within this function. |
977 | Calls to eval after the call to echo_area_display would confuse | |
978 | the display_line mechanism and would cause a crash. | |
979 | Calls to eval before that point will work most of the time, | |
980 | but can still lose, because this function | |
981 | can be called from signal handlers; with alarms set up; | |
a2889657 | 982 | or with synchronous processes running. |
90adcf20 | 983 | |
a2889657 JB |
984 | See Fcall_process; if you called it from here, it could be |
985 | entered recursively. */ | |
986 | ||
0d231165 RS |
987 | static int do_verify_charstarts; |
988 | ||
463f6b91 RS |
989 | /* Counter is used to clear the face cache |
990 | no more than once ever 1000 redisplays. */ | |
991 | static int clear_face_cache_count; | |
992 | ||
20de20dc RS |
993 | /* Record the previous terminal frame we displayed. */ |
994 | static FRAME_PTR previous_terminal_frame; | |
995 | ||
a2889657 JB |
996 | void |
997 | redisplay () | |
e9874cee RS |
998 | { |
999 | redisplay_internal (0); | |
1000 | } | |
1001 | ||
1002 | /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay | |
1003 | is not in response to any user action; therefore, we should | |
94a66eea RS |
1004 | preserve the echo area. (Actually, our caller does that job.) |
1005 | Perhaps in the future avoid recentering windows | |
e9874cee RS |
1006 | if it is not necessary; currently that causes some problems. */ |
1007 | ||
1008 | static void | |
1009 | redisplay_internal (preserve_echo_area) | |
1010 | int preserve_echo_area; | |
a2889657 JB |
1011 | { |
1012 | register struct window *w = XWINDOW (selected_window); | |
1013 | register int pause; | |
1014 | int must_finish = 0; | |
1015 | int all_windows; | |
1016 | register int tlbufpos, tlendpos; | |
1017 | struct position pos; | |
89819bdd | 1018 | int number_of_visible_frames; |
a2889657 JB |
1019 | |
1020 | if (noninteractive) | |
1021 | return; | |
1022 | ||
15f0cf78 RS |
1023 | #ifdef USE_X_TOOLKIT |
1024 | if (popup_activated ()) | |
1025 | return; | |
1026 | #endif | |
1027 | ||
8b32d885 RS |
1028 | retry: |
1029 | ||
fd8ff63d | 1030 | if (! FRAME_WINDOW_P (selected_frame) |
20de20dc RS |
1031 | && previous_terminal_frame != selected_frame) |
1032 | { | |
1033 | /* Since frames on an ASCII terminal share the same display area, | |
1034 | displaying a different frame means redisplay the whole thing. */ | |
1035 | windows_or_buffers_changed++; | |
1036 | SET_FRAME_GARBAGED (selected_frame); | |
1037 | XSETFRAME (Vterminal_frame, selected_frame); | |
1038 | } | |
1039 | previous_terminal_frame = selected_frame; | |
20de20dc | 1040 | |
d724d989 JB |
1041 | /* Set the visible flags for all frames. |
1042 | Do this before checking for resized or garbaged frames; they want | |
1043 | to know if their frames are visible. | |
1044 | See the comment in frame.h for FRAME_SAMPLE_VISIBILITY. */ | |
1045 | { | |
35f56f96 | 1046 | Lisp_Object tail, frame; |
d724d989 | 1047 | |
89819bdd RS |
1048 | number_of_visible_frames = 0; |
1049 | ||
35f56f96 | 1050 | FOR_EACH_FRAME (tail, frame) |
f82aff7c RS |
1051 | { |
1052 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
1053 | ||
8e83f802 RS |
1054 | if (FRAME_VISIBLE_P (XFRAME (frame))) |
1055 | number_of_visible_frames++; | |
89819bdd | 1056 | |
f82aff7c RS |
1057 | /* Clear out all the display lines in which we will generate the |
1058 | glyphs to display. */ | |
1059 | init_desired_glyphs (XFRAME (frame)); | |
1060 | } | |
d724d989 JB |
1061 | } |
1062 | ||
44fa5b1e | 1063 | /* Notice any pending interrupt request to change frame size. */ |
a2889657 JB |
1064 | do_pending_window_change (); |
1065 | ||
44fa5b1e | 1066 | if (frame_garbaged) |
a2889657 | 1067 | { |
02a9b6e4 | 1068 | redraw_garbaged_frames (); |
44fa5b1e | 1069 | frame_garbaged = 0; |
a2889657 JB |
1070 | } |
1071 | ||
f82aff7c RS |
1072 | prepare_menu_bars (); |
1073 | ||
28995e67 | 1074 | if (windows_or_buffers_changed) |
a2889657 JB |
1075 | update_mode_lines++; |
1076 | ||
538f13d4 RS |
1077 | /* Detect case that we need to write or remove a star in the mode line. */ |
1078 | if ((SAVE_MODIFF < MODIFF) != !NILP (w->last_had_star)) | |
a2889657 JB |
1079 | { |
1080 | w->update_mode_line = Qt; | |
1081 | if (buffer_shared > 1) | |
1082 | update_mode_lines++; | |
1083 | } | |
1084 | ||
28995e67 RS |
1085 | /* If %c is in use, update it if needed. */ |
1086 | if (!NILP (w->column_number_displayed) | |
1087 | /* This alternative quickly identifies a common case | |
1088 | where no change is needed. */ | |
1089 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
1090 | && XFASTINT (w->last_modified) >= MODIFF |
1091 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
1092 | && XFASTINT (w->column_number_displayed) != current_column ()) |
1093 | w->update_mode_line = Qt; | |
1094 | ||
44fa5b1e | 1095 | FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w->frame)) = -1; |
a2889657 JB |
1096 | |
1097 | all_windows = update_mode_lines || buffer_shared > 1; | |
a2889657 JB |
1098 | |
1099 | /* If specs for an arrow have changed, do thorough redisplay | |
1100 | to ensure we remove any arrow that should no longer exist. */ | |
d45de95b | 1101 | if (! EQ (COERCE_MARKER (Voverlay_arrow_position), last_arrow_position) |
ded34426 | 1102 | || ! EQ (Voverlay_arrow_string, last_arrow_string)) |
28995e67 | 1103 | all_windows = 1; |
a2889657 | 1104 | |
90adcf20 RS |
1105 | /* Normally the message* functions will have already displayed and |
1106 | updated the echo area, but the frame may have been trashed, or | |
1107 | the update may have been preempted, so display the echo area | |
1108 | again here. */ | |
1109 | if (echo_area_glyphs || previous_echo_glyphs) | |
1110 | { | |
1111 | echo_area_display (); | |
1112 | must_finish = 1; | |
1113 | } | |
1114 | ||
bd66d1ba RS |
1115 | /* If showing region, and mark has changed, must redisplay whole window. */ |
1116 | if (((!NILP (Vtransient_mark_mode) | |
1117 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
1118 | != !NILP (w->region_showing)) | |
82d04750 JB |
1119 | || (!NILP (w->region_showing) |
1120 | && !EQ (w->region_showing, | |
1121 | Fmarker_position (XBUFFER (w->buffer)->mark)))) | |
bd66d1ba RS |
1122 | this_line_bufpos = -1; |
1123 | ||
a2889657 JB |
1124 | tlbufpos = this_line_bufpos; |
1125 | tlendpos = this_line_endpos; | |
265a9e55 | 1126 | if (!all_windows && tlbufpos > 0 && NILP (w->update_mode_line) |
73af359d | 1127 | && !current_buffer->clip_changed |
44fa5b1e | 1128 | && FRAME_VISIBLE_P (XFRAME (w->frame)) |
f21ef775 | 1129 | && !FRAME_OBSCURED_P (XFRAME (w->frame)) |
a2889657 JB |
1130 | /* Make sure recorded data applies to current buffer, etc */ |
1131 | && this_line_buffer == current_buffer | |
1132 | && current_buffer == XBUFFER (w->buffer) | |
265a9e55 | 1133 | && NILP (w->force_start) |
a2889657 | 1134 | /* Point must be on the line that we have info recorded about */ |
ae3b1442 KH |
1135 | && PT >= tlbufpos |
1136 | && PT <= Z - tlendpos | |
a2889657 JB |
1137 | /* All text outside that line, including its final newline, |
1138 | must be unchanged */ | |
8850a573 RS |
1139 | && ((XFASTINT (w->last_modified) >= MODIFF |
1140 | && (XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF)) | |
a2889657 JB |
1141 | || (beg_unchanged >= tlbufpos - 1 |
1142 | && GPT >= tlbufpos | |
05ba02eb JB |
1143 | /* If selective display, can't optimize |
1144 | if the changes start at the beginning of the line. */ | |
e24c997d | 1145 | && ((INTEGERP (current_buffer->selective_display) |
05ba02eb JB |
1146 | && XINT (current_buffer->selective_display) > 0 |
1147 | ? (beg_unchanged >= tlbufpos | |
1148 | && GPT > tlbufpos) | |
1149 | : 1)) | |
a2889657 JB |
1150 | && end_unchanged >= tlendpos |
1151 | && Z - GPT >= tlendpos))) | |
1152 | { | |
12adba34 RS |
1153 | int tlbufpos_byte = CHAR_TO_BYTE (tlbufpos); |
1154 | if (tlbufpos > BEGV && FETCH_BYTE (tlbufpos_byte - 1) != '\n' | |
a2889657 | 1155 | && (tlbufpos == ZV |
12adba34 | 1156 | || FETCH_BYTE (tlbufpos_byte) == '\n')) |
a2889657 JB |
1157 | /* Former continuation line has disappeared by becoming empty */ |
1158 | goto cancel; | |
1159 | else if (XFASTINT (w->last_modified) < MODIFF | |
8850a573 | 1160 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF |
a2889657 JB |
1161 | || MINI_WINDOW_P (w)) |
1162 | { | |
1c9241f5 KH |
1163 | /* We have to handle the case of continuation around a |
1164 | wide-column character (See the comment in indent.c around | |
1165 | line 885). | |
1166 | ||
1167 | For instance, in the following case: | |
1168 | ||
1169 | -------- Insert -------- | |
1170 | K_A_N_\\ `a' K_A_N_a\ `X_' are wide-column chars. | |
1171 | J_I_ ==> J_I_ `^^' are cursors. | |
1172 | ^^ ^^ | |
1173 | -------- -------- | |
1174 | ||
1175 | As we have to redraw the line above, we should goto cancel. */ | |
1176 | ||
1177 | struct position val; | |
1178 | int prevline; | |
12adba34 | 1179 | int opoint = PT, opoint_byte = PT_BYTE; |
1c9241f5 | 1180 | |
12adba34 RS |
1181 | scan_newline (tlbufpos, tlbufpos_byte, BEGV, BEGV_BYTE, -1, 1); |
1182 | ||
1183 | val = *compute_motion (PT, 0, | |
1c9241f5 KH |
1184 | XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0, |
1185 | 0, | |
1186 | tlbufpos, | |
1187 | 1 << (BITS_PER_SHORT - 1), | |
1188 | 1 << (BITS_PER_SHORT - 1), | |
1189 | window_internal_width (w) - 1, | |
1190 | XINT (w->hscroll), 0, w); | |
12adba34 | 1191 | SET_PT_BOTH (opoint, opoint_byte); |
1c9241f5 KH |
1192 | if (val.hpos != this_line_start_hpos) |
1193 | goto cancel; | |
1194 | ||
a2889657 JB |
1195 | cursor_vpos = -1; |
1196 | overlay_arrow_seen = 0; | |
ca26e1c8 | 1197 | zv_strings_seen = 0; |
12adba34 RS |
1198 | display_text_line (w, tlbufpos, tlbufpos_byte, |
1199 | this_line_vpos, this_line_start_hpos, | |
1200 | pos_tab_offset (w, tlbufpos, tlbufpos_byte), 0); | |
a2889657 JB |
1201 | /* If line contains point, is not continued, |
1202 | and ends at same distance from eob as before, we win */ | |
1203 | if (cursor_vpos >= 0 && this_line_bufpos | |
1204 | && this_line_endpos == tlendpos) | |
1205 | { | |
0d231165 RS |
1206 | /* If this is not the window's last line, |
1207 | we must adjust the charstarts of the lines below. */ | |
1208 | if (this_line_vpos + 1 | |
1209 | < XFASTINT (w->top) + window_internal_height (w)) | |
85bcef6c | 1210 | { |
73f194f1 | 1211 | int left = WINDOW_LEFT_MARGIN (w); |
85bcef6c RS |
1212 | int *charstart_next_line |
1213 | = FRAME_CURRENT_GLYPHS (XFRAME (WINDOW_FRAME (w)))->charstarts[this_line_vpos + 1]; | |
85bcef6c RS |
1214 | int adjust; |
1215 | ||
1216 | if (Z - tlendpos == ZV) | |
1217 | /* This line ends at end of (accessible part of) buffer. | |
1218 | There is no newline to count. */ | |
1219 | adjust = Z - tlendpos - charstart_next_line[left]; | |
1220 | else | |
1221 | /* This line ends in a newline. | |
1222 | Must take account of the newline and the rest of the | |
1223 | text that follows. */ | |
1224 | adjust = Z - tlendpos + 1 - charstart_next_line[left]; | |
1225 | ||
1226 | adjust_window_charstarts (w, this_line_vpos, adjust); | |
1227 | } | |
46db8486 | 1228 | |
73f194f1 | 1229 | if (!WINDOW_FULL_WIDTH_P (w)) |
a2889657 JB |
1230 | preserve_other_columns (w); |
1231 | goto update; | |
1232 | } | |
1233 | else | |
1234 | goto cancel; | |
1235 | } | |
b6f0fe04 RS |
1236 | else if (PT == XFASTINT (w->last_point) |
1237 | /* Make sure the cursor was last displayed | |
1238 | in this window. Otherwise we have to reposition it. */ | |
1239 | && XINT (w->top) <= FRAME_CURSOR_Y (selected_frame) | |
1240 | && (XINT (w->top) + XINT (w->height) | |
1241 | > FRAME_CURSOR_Y (selected_frame))) | |
a2889657 JB |
1242 | { |
1243 | if (!must_finish) | |
1244 | { | |
1245 | do_pending_window_change (); | |
1246 | return; | |
1247 | } | |
1248 | goto update; | |
1249 | } | |
8b51f1e3 KH |
1250 | /* If highlighting the region, or if the cursor is in the echo area, |
1251 | then we can't just move the cursor. */ | |
bd66d1ba RS |
1252 | else if (! (!NILP (Vtransient_mark_mode) |
1253 | && !NILP (current_buffer->mark_active)) | |
293a54ce RS |
1254 | && (w == XWINDOW (current_buffer->last_selected_window) |
1255 | || highlight_nonselected_windows) | |
8b51f1e3 KH |
1256 | && NILP (w->region_showing) |
1257 | && !cursor_in_echo_area) | |
a2889657 JB |
1258 | { |
1259 | pos = *compute_motion (tlbufpos, 0, | |
1260 | XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0, | |
ca26e1c8 | 1261 | 0, |
68be917d | 1262 | PT, 2, - (1 << (BITS_PER_SHORT - 1)), |
b1d1124b | 1263 | window_internal_width (w) - 1, |
de3e8b15 | 1264 | XINT (w->hscroll), |
12adba34 RS |
1265 | pos_tab_offset (w, tlbufpos, tlbufpos_byte), |
1266 | w); | |
a2889657 JB |
1267 | if (pos.vpos < 1) |
1268 | { | |
210e752f | 1269 | int width = window_internal_width (w) - 1; |
44fa5b1e | 1270 | FRAME_CURSOR_X (selected_frame) |
73f194f1 | 1271 | = WINDOW_LEFT_MARGIN (w) + minmax (0, pos.hpos, width); |
44fa5b1e | 1272 | FRAME_CURSOR_Y (selected_frame) = this_line_vpos; |
a2889657 JB |
1273 | goto update; |
1274 | } | |
1275 | else | |
1276 | goto cancel; | |
1277 | } | |
1278 | cancel: | |
1279 | /* Text changed drastically or point moved off of line */ | |
44fa5b1e | 1280 | cancel_line (this_line_vpos, selected_frame); |
a2889657 JB |
1281 | } |
1282 | ||
1283 | this_line_bufpos = 0; | |
1284 | all_windows |= buffer_shared > 1; | |
1285 | ||
463f6b91 RS |
1286 | clear_face_cache_count++; |
1287 | ||
a2889657 JB |
1288 | if (all_windows) |
1289 | { | |
35f56f96 | 1290 | Lisp_Object tail, frame; |
a2889657 | 1291 | |
87485d6f | 1292 | #ifdef HAVE_FACES |
463f6b91 RS |
1293 | /* Clear the face cache, only when we do a full redisplay |
1294 | and not too often either. */ | |
1295 | if (clear_face_cache_count > 1000) | |
1296 | { | |
1297 | clear_face_cache (); | |
1298 | clear_face_cache_count = 0; | |
1299 | } | |
31b24551 JB |
1300 | #endif |
1301 | ||
a2889657 | 1302 | /* Recompute # windows showing selected buffer. |
8de2d90b | 1303 | This will be incremented each time such a window is displayed. */ |
a2889657 JB |
1304 | buffer_shared = 0; |
1305 | ||
35f56f96 | 1306 | FOR_EACH_FRAME (tail, frame) |
30c566e4 | 1307 | { |
35f56f96 | 1308 | FRAME_PTR f = XFRAME (frame); |
fd8ff63d | 1309 | if (FRAME_WINDOW_P (f) || f == selected_frame) |
9769686d | 1310 | { |
35f56f96 | 1311 | |
9769686d RS |
1312 | /* Mark all the scroll bars to be removed; we'll redeem the ones |
1313 | we want when we redisplay their windows. */ | |
1314 | if (condemn_scroll_bars_hook) | |
1315 | (*condemn_scroll_bars_hook) (f); | |
30c566e4 | 1316 | |
f21ef775 | 1317 | if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
89819bdd | 1318 | redisplay_windows (FRAME_ROOT_WINDOW (f), preserve_echo_area); |
30c566e4 | 1319 | |
9769686d RS |
1320 | /* Any scroll bars which redisplay_windows should have nuked |
1321 | should now go away. */ | |
1322 | if (judge_scroll_bars_hook) | |
1323 | (*judge_scroll_bars_hook) (f); | |
1324 | } | |
30c566e4 | 1325 | } |
a2889657 | 1326 | } |
f21ef775 | 1327 | else if (FRAME_VISIBLE_P (selected_frame) && !FRAME_OBSCURED_P (selected_frame)) |
a2889657 | 1328 | { |
e9874cee | 1329 | redisplay_window (selected_window, 1, preserve_echo_area); |
73f194f1 | 1330 | if (!WINDOW_FULL_WIDTH_P (w)) |
a2889657 JB |
1331 | preserve_other_columns (w); |
1332 | } | |
1333 | ||
1334 | update: | |
1335 | /* Prevent various kinds of signals during display update. | |
1336 | stdio is not robust about handling signals, | |
1337 | which can cause an apparent I/O error. */ | |
1338 | if (interrupt_input) | |
1339 | unrequest_sigio (); | |
1340 | stop_polling (); | |
1341 | ||
a2889657 JB |
1342 | if (all_windows) |
1343 | { | |
1344 | Lisp_Object tail; | |
1345 | ||
1346 | pause = 0; | |
1347 | ||
44fa5b1e | 1348 | for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr) |
a2889657 | 1349 | { |
44fa5b1e | 1350 | FRAME_PTR f; |
a2889657 | 1351 | |
e24c997d | 1352 | if (!FRAMEP (XCONS (tail)->car)) |
a2889657 JB |
1353 | continue; |
1354 | ||
44fa5b1e | 1355 | f = XFRAME (XCONS (tail)->car); |
1af9f229 | 1356 | |
fd8ff63d | 1357 | if ((FRAME_WINDOW_P (f) || f == selected_frame) |
f21ef775 | 1358 | && FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
a2889657 | 1359 | { |
44fa5b1e | 1360 | pause |= update_frame (f, 0, 0); |
a2889657 | 1361 | if (!pause) |
efc63ef0 RS |
1362 | { |
1363 | mark_window_display_accurate (f->root_window, 1); | |
1364 | if (frame_up_to_date_hook != 0) | |
1365 | (*frame_up_to_date_hook) (f); | |
1366 | } | |
a2889657 JB |
1367 | } |
1368 | } | |
1369 | } | |
1370 | else | |
6e8290aa | 1371 | { |
f21ef775 | 1372 | if (FRAME_VISIBLE_P (selected_frame) && !FRAME_OBSCURED_P (selected_frame)) |
44fa5b1e | 1373 | pause = update_frame (selected_frame, 0, 0); |
4d641a15 KH |
1374 | else |
1375 | pause = 0; | |
d724d989 | 1376 | |
8de2d90b | 1377 | /* We may have called echo_area_display at the top of this |
44fa5b1e JB |
1378 | function. If the echo area is on another frame, that may |
1379 | have put text on a frame other than the selected one, so the | |
1380 | above call to update_frame would not have caught it. Catch | |
8de2d90b JB |
1381 | it here. */ |
1382 | { | |
84faf44c RS |
1383 | Lisp_Object mini_window; |
1384 | FRAME_PTR mini_frame; | |
1385 | ||
1386 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
1387 | mini_frame = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
8de2d90b | 1388 | |
fd8ff63d | 1389 | if (mini_frame != selected_frame && FRAME_WINDOW_P (mini_frame)) |
44fa5b1e | 1390 | pause |= update_frame (mini_frame, 0, 0); |
8de2d90b | 1391 | } |
6e8290aa | 1392 | } |
a2889657 | 1393 | |
44fa5b1e | 1394 | /* If frame does not match, prevent doing single-line-update next time. |
a2889657 JB |
1395 | Also, don't forget to check every line to update the arrow. */ |
1396 | if (pause) | |
1397 | { | |
1398 | this_line_bufpos = 0; | |
265a9e55 | 1399 | if (!NILP (last_arrow_position)) |
a2889657 JB |
1400 | { |
1401 | last_arrow_position = Qt; | |
1402 | last_arrow_string = Qt; | |
1403 | } | |
44fa5b1e | 1404 | /* If we pause after scrolling, some lines in current_frame |
a2889657 JB |
1405 | may be null, so preserve_other_columns won't be able to |
1406 | preserve all the vertical-bar separators. So, avoid using it | |
1407 | in that case. */ | |
73f194f1 | 1408 | if (!WINDOW_FULL_WIDTH_P (w)) |
a2889657 JB |
1409 | update_mode_lines = 1; |
1410 | } | |
1411 | ||
44fa5b1e | 1412 | /* Now text on frame agrees with windows, so |
a2889657 JB |
1413 | put info into the windows for partial redisplay to follow */ |
1414 | ||
1415 | if (!pause) | |
1416 | { | |
1417 | register struct buffer *b = XBUFFER (w->buffer); | |
1418 | ||
1419 | blank_end_of_window = 0; | |
a2889657 | 1420 | unchanged_modified = BUF_MODIFF (b); |
8850a573 | 1421 | overlay_unchanged_modified = BUF_OVERLAY_MODIFF (b); |
a2889657 JB |
1422 | beg_unchanged = BUF_GPT (b) - BUF_BEG (b); |
1423 | end_unchanged = BUF_Z (b) - BUF_GPT (b); | |
1424 | ||
c2213350 KH |
1425 | XSETFASTINT (w->last_point, BUF_PT (b)); |
1426 | XSETFASTINT (w->last_point_x, FRAME_CURSOR_X (selected_frame)); | |
1427 | XSETFASTINT (w->last_point_y, FRAME_CURSOR_Y (selected_frame)); | |
a2889657 JB |
1428 | |
1429 | if (all_windows) | |
11e82b76 | 1430 | mark_window_display_accurate (FRAME_ROOT_WINDOW (selected_frame), 1); |
a2889657 JB |
1431 | else |
1432 | { | |
28995e67 | 1433 | b->clip_changed = 0; |
a2889657 | 1434 | w->update_mode_line = Qnil; |
c2213350 | 1435 | XSETFASTINT (w->last_modified, BUF_MODIFF (b)); |
8850a573 | 1436 | XSETFASTINT (w->last_overlay_modified, BUF_OVERLAY_MODIFF (b)); |
538f13d4 RS |
1437 | w->last_had_star |
1438 | = (BUF_MODIFF (XBUFFER (w->buffer)) > BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
1439 | ? Qt : Qnil); | |
3ee4159a RS |
1440 | |
1441 | /* Record if we are showing a region, so can make sure to | |
1442 | update it fully at next redisplay. */ | |
1443 | w->region_showing = (!NILP (Vtransient_mark_mode) | |
293a54ce RS |
1444 | && (w == XWINDOW (current_buffer->last_selected_window) |
1445 | || highlight_nonselected_windows) | |
3ee4159a RS |
1446 | && !NILP (XBUFFER (w->buffer)->mark_active) |
1447 | ? Fmarker_position (XBUFFER (w->buffer)->mark) | |
1448 | : Qnil); | |
1449 | ||
d2f84654 | 1450 | w->window_end_valid = w->buffer; |
d45de95b | 1451 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 | 1452 | last_arrow_string = Voverlay_arrow_string; |
0d231165 RS |
1453 | if (do_verify_charstarts) |
1454 | verify_charstarts (w); | |
efc63ef0 RS |
1455 | if (frame_up_to_date_hook != 0) |
1456 | (*frame_up_to_date_hook) (selected_frame); | |
a2889657 JB |
1457 | } |
1458 | update_mode_lines = 0; | |
1459 | windows_or_buffers_changed = 0; | |
1460 | } | |
1461 | ||
1462 | /* Start SIGIO interrupts coming again. | |
1463 | Having them off during the code above | |
1464 | makes it less likely one will discard output, | |
1465 | but not impossible, since there might be stuff | |
1466 | in the system buffer here. | |
1467 | But it is much hairier to try to do anything about that. */ | |
1468 | ||
1469 | if (interrupt_input) | |
1470 | request_sigio (); | |
1471 | start_polling (); | |
1472 | ||
11c52c4f RS |
1473 | /* If something has become visible now which was not before, |
1474 | redisplay again, so that we get them. */ | |
1475 | if (!pause) | |
1476 | { | |
1477 | Lisp_Object tail, frame; | |
1478 | int new_count = 0; | |
1479 | ||
1480 | FOR_EACH_FRAME (tail, frame) | |
1481 | { | |
1482 | int this_is_visible = 0; | |
8e83f802 RS |
1483 | |
1484 | if (XFRAME (frame)->visible) | |
1485 | this_is_visible = 1; | |
1486 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
1487 | if (XFRAME (frame)->visible) | |
1488 | this_is_visible = 1; | |
11c52c4f RS |
1489 | |
1490 | if (this_is_visible) | |
1491 | new_count++; | |
1492 | } | |
1493 | ||
89819bdd | 1494 | if (new_count != number_of_visible_frames) |
11c52c4f RS |
1495 | windows_or_buffers_changed++; |
1496 | } | |
1497 | ||
44fa5b1e | 1498 | /* Change frame size now if a change is pending. */ |
a2889657 | 1499 | do_pending_window_change (); |
d8e242fd | 1500 | |
8b32d885 RS |
1501 | /* If we just did a pending size change, or have additional |
1502 | visible frames, redisplay again. */ | |
3c8c72e0 | 1503 | if (windows_or_buffers_changed && !pause) |
8b32d885 | 1504 | goto retry; |
a2889657 JB |
1505 | } |
1506 | ||
1507 | /* Redisplay, but leave alone any recent echo area message | |
1508 | unless another message has been requested in its place. | |
1509 | ||
1510 | This is useful in situations where you need to redisplay but no | |
1511 | user action has occurred, making it inappropriate for the message | |
1512 | area to be cleared. See tracking_off and | |
1513 | wait_reading_process_input for examples of these situations. */ | |
1514 | ||
8991bb31 | 1515 | void |
a2889657 JB |
1516 | redisplay_preserve_echo_area () |
1517 | { | |
1518 | if (echo_area_glyphs == 0 && previous_echo_glyphs != 0) | |
1519 | { | |
1520 | echo_area_glyphs = previous_echo_glyphs; | |
e9874cee | 1521 | redisplay_internal (1); |
a2889657 JB |
1522 | echo_area_glyphs = 0; |
1523 | } | |
1524 | else | |
e9874cee | 1525 | redisplay_internal (1); |
a2889657 JB |
1526 | } |
1527 | ||
1528 | void | |
1529 | mark_window_display_accurate (window, flag) | |
1530 | Lisp_Object window; | |
1531 | int flag; | |
1532 | { | |
1533 | register struct window *w; | |
1534 | ||
265a9e55 | 1535 | for (;!NILP (window); window = w->next) |
a2889657 | 1536 | { |
e24c997d | 1537 | if (!WINDOWP (window)) abort (); |
a2889657 JB |
1538 | w = XWINDOW (window); |
1539 | ||
265a9e55 | 1540 | if (!NILP (w->buffer)) |
bd66d1ba | 1541 | { |
c2213350 KH |
1542 | XSETFASTINT (w->last_modified, |
1543 | !flag ? 0 : BUF_MODIFF (XBUFFER (w->buffer))); | |
8850a573 RS |
1544 | XSETFASTINT (w->last_overlay_modified, |
1545 | !flag ? 0 : BUF_OVERLAY_MODIFF (XBUFFER (w->buffer))); | |
538f13d4 RS |
1546 | w->last_had_star |
1547 | = (BUF_MODIFF (XBUFFER (w->buffer)) > BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
1548 | ? Qt : Qnil); | |
bd66d1ba RS |
1549 | |
1550 | /* Record if we are showing a region, so can make sure to | |
1551 | update it fully at next redisplay. */ | |
1552 | w->region_showing = (!NILP (Vtransient_mark_mode) | |
293a54ce RS |
1553 | && (w == XWINDOW (current_buffer->last_selected_window) |
1554 | || highlight_nonselected_windows) | |
bd66d1ba RS |
1555 | && !NILP (XBUFFER (w->buffer)->mark_active) |
1556 | ? Fmarker_position (XBUFFER (w->buffer)->mark) | |
1557 | : Qnil); | |
1558 | } | |
1559 | ||
d2f84654 | 1560 | w->window_end_valid = w->buffer; |
a2889657 | 1561 | w->update_mode_line = Qnil; |
051e7076 | 1562 | if (!NILP (w->buffer) && flag) |
28995e67 | 1563 | XBUFFER (w->buffer)->clip_changed = 0; |
a2889657 | 1564 | |
265a9e55 | 1565 | if (!NILP (w->vchild)) |
a2889657 | 1566 | mark_window_display_accurate (w->vchild, flag); |
265a9e55 | 1567 | if (!NILP (w->hchild)) |
a2889657 JB |
1568 | mark_window_display_accurate (w->hchild, flag); |
1569 | } | |
1570 | ||
1571 | if (flag) | |
1572 | { | |
d45de95b | 1573 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 JB |
1574 | last_arrow_string = Voverlay_arrow_string; |
1575 | } | |
1576 | else | |
1577 | { | |
1578 | /* t is unequal to any useful value of Voverlay_arrow_... */ | |
1579 | last_arrow_position = Qt; | |
1580 | last_arrow_string = Qt; | |
1581 | } | |
1582 | } | |
1583 | \f | |
ecf7de9b | 1584 | /* Update the menu bar item list for frame F. |
90adcf20 | 1585 | This has to be done before we start to fill in any display lines, |
a2725ab2 RS |
1586 | because it can call eval. |
1587 | ||
1588 | If SAVE_MATCH_DATA is 1, we must save and restore it here. */ | |
90adcf20 RS |
1589 | |
1590 | static void | |
a2725ab2 | 1591 | update_menu_bar (f, save_match_data) |
ecf7de9b | 1592 | FRAME_PTR f; |
a2725ab2 | 1593 | int save_match_data; |
90adcf20 | 1594 | { |
90adcf20 | 1595 | struct buffer *old = current_buffer; |
ecf7de9b RS |
1596 | Lisp_Object window; |
1597 | register struct window *w; | |
a2725ab2 | 1598 | |
ecf7de9b RS |
1599 | window = FRAME_SELECTED_WINDOW (f); |
1600 | w = XWINDOW (window); | |
90adcf20 RS |
1601 | |
1602 | if (update_mode_lines) | |
1603 | w->update_mode_line = Qt; | |
1604 | ||
d1e74921 | 1605 | if (FRAME_WINDOW_P (f) |
d3413a53 | 1606 | ? |
dc937613 | 1607 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) |
cf074754 | 1608 | FRAME_EXTERNAL_MENU_BAR (f) |
78614721 | 1609 | #else |
cf074754 | 1610 | FRAME_MENU_BAR_LINES (f) > 0 |
78614721 | 1611 | #endif |
d3413a53 | 1612 | : FRAME_MENU_BAR_LINES (f) > 0) |
90adcf20 RS |
1613 | { |
1614 | /* If the user has switched buffers or windows, we need to | |
1615 | recompute to reflect the new bindings. But we'll | |
1616 | recompute when update_mode_lines is set too; that means | |
1617 | that people can use force-mode-line-update to request | |
1618 | that the menu bar be recomputed. The adverse effect on | |
1619 | the rest of the redisplay algorithm is about the same as | |
1620 | windows_or_buffers_changed anyway. */ | |
1621 | if (windows_or_buffers_changed | |
cf074754 | 1622 | || !NILP (w->update_mode_line) |
538f13d4 RS |
1623 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) |
1624 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
1625 | != !NILP (w->last_had_star)) | |
94bb7f9b KH |
1626 | || ((!NILP (Vtransient_mark_mode) |
1627 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
1628 | != !NILP (w->region_showing))) | |
90adcf20 RS |
1629 | { |
1630 | struct buffer *prev = current_buffer; | |
a2725ab2 RS |
1631 | int count = specpdl_ptr - specpdl; |
1632 | ||
399164b4 | 1633 | set_buffer_internal_1 (XBUFFER (w->buffer)); |
eac4251c | 1634 | if (save_match_data) |
84dd0ae5 | 1635 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); |
399164b4 | 1636 | if (NILP (Voverriding_local_map_menu_flag)) |
d46fb96a KH |
1637 | { |
1638 | specbind (Qoverriding_terminal_local_map, Qnil); | |
1639 | specbind (Qoverriding_local_map, Qnil); | |
1640 | } | |
a2725ab2 | 1641 | |
34acc8e6 KH |
1642 | /* Run the Lucid hook. */ |
1643 | call1 (Vrun_hooks, Qactivate_menubar_hook); | |
1644 | /* If it has changed current-menubar from previous value, | |
1645 | really recompute the menubar from the value. */ | |
1646 | if (! NILP (Vlucid_menu_bar_dirty_flag)) | |
1647 | call0 (Qrecompute_lucid_menubar); | |
e02500d4 | 1648 | safe_run_hooks (Qmenu_bar_update_hook); |
8351baf2 | 1649 | FRAME_MENU_BAR_ITEMS (f) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f)); |
538f13d4 | 1650 | /* Redisplay the menu bar in case we changed it. */ |
8f3343d0 | 1651 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) |
d1e74921 | 1652 | if (FRAME_WINDOW_P (f)) |
d3413a53 | 1653 | set_frame_menubar (f, 0, 0); |
538f13d4 RS |
1654 | else |
1655 | /* On a terminal screen, the menu bar is an ordinary screen | |
1656 | line, and this makes it get updated. */ | |
1657 | w->update_mode_line = Qt; | |
1658 | #else /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
1659 | /* In the non-toolkit version, the menu bar is an ordinary screen | |
1660 | line, and this makes it get updated. */ | |
1661 | w->update_mode_line = Qt; | |
1662 | #endif /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
a2725ab2 RS |
1663 | |
1664 | unbind_to (count, Qnil); | |
399164b4 | 1665 | set_buffer_internal_1 (prev); |
90adcf20 RS |
1666 | } |
1667 | } | |
1668 | } | |
1669 | \f | |
a2889657 JB |
1670 | int do_id = 1; |
1671 | ||
90adcf20 RS |
1672 | /* Redisplay WINDOW and its subwindows and siblings. */ |
1673 | ||
a2889657 | 1674 | static void |
e9874cee | 1675 | redisplay_windows (window, preserve_echo_area) |
a2889657 | 1676 | Lisp_Object window; |
e9874cee | 1677 | int preserve_echo_area; |
a2889657 | 1678 | { |
265a9e55 | 1679 | for (; !NILP (window); window = XWINDOW (window)->next) |
e9874cee | 1680 | redisplay_window (window, 0, preserve_echo_area); |
a2889657 JB |
1681 | } |
1682 | ||
1f1ff51d KH |
1683 | /* Return value in display table DP (Lisp_Char_Table *) for character |
1684 | C. Since a display table doesn't have any parent, we don't have to | |
1685 | follow parent. Do not call this function directly but use the | |
1686 | macro DISP_CHAR_VECTOR. */ | |
1687 | Lisp_Object | |
1688 | disp_char_vector (dp, c) | |
1689 | struct Lisp_Char_Table *dp; | |
1690 | int c; | |
1691 | { | |
1692 | int code[4], i; | |
1693 | Lisp_Object val; | |
1694 | ||
1695 | if (SINGLE_BYTE_CHAR_P (c)) return (dp->contents[c]); | |
1696 | ||
1697 | SPLIT_NON_ASCII_CHAR (c, code[0], code[1], code[2]); | |
1698 | if (code[0] != CHARSET_COMPOSITION) | |
1699 | { | |
1700 | if (code[1] < 32) code[1] = -1; | |
1701 | else if (code[2] < 32) code[2] = -1; | |
1702 | } | |
1703 | /* Here, the possible range of CODE[0] (== charset ID) is | |
1704 | 128..MAX_CHARSET. Since the top level char table contains data | |
1705 | for multibyte characters after 256th element, we must increment | |
1706 | CODE[0] by 128 to get a correct index. */ | |
1707 | code[0] += 128; | |
1708 | code[3] = -1; /* anchor */ | |
1709 | ||
1710 | for (i = 0; code[i] >= 0; i++, dp = XCHAR_TABLE (val)) | |
1711 | { | |
1712 | val = dp->contents[code[i]]; | |
1713 | if (!SUB_CHAR_TABLE_P (val)) | |
1714 | return (NILP (val) ? dp->defalt : val); | |
1715 | } | |
1716 | /* Here, VAL is a sub char table. We return the default value of it. */ | |
1717 | return (dp->defalt); | |
1718 | } | |
1719 | ||
90adcf20 RS |
1720 | /* Redisplay window WINDOW and its subwindows. */ |
1721 | ||
a2889657 | 1722 | static void |
e9874cee | 1723 | redisplay_window (window, just_this_one, preserve_echo_area) |
a2889657 | 1724 | Lisp_Object window; |
e9874cee | 1725 | int just_this_one, preserve_echo_area; |
a2889657 JB |
1726 | { |
1727 | register struct window *w = XWINDOW (window); | |
30c566e4 | 1728 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
a2889657 | 1729 | int height; |
12adba34 RS |
1730 | int lpoint = PT; |
1731 | int lpoint_byte = PT_BYTE; | |
a2889657 | 1732 | struct buffer *old = current_buffer; |
b1d1124b | 1733 | register int width = window_internal_width (w) - 1; |
12adba34 | 1734 | register int startp, startp_byte; |
a2889657 JB |
1735 | register int hscroll = XINT (w->hscroll); |
1736 | struct position pos; | |
ae3b1442 | 1737 | int opoint = PT; |
12adba34 | 1738 | int opoint_byte = PT_BYTE; |
a2889657 | 1739 | int tem; |
e481f960 | 1740 | int update_mode_line; |
f908610f | 1741 | struct Lisp_Char_Table *dp = window_display_table (w); |
a2889657 | 1742 | |
12adba34 RS |
1743 | if (Z == Z_BYTE && lpoint != lpoint_byte) |
1744 | abort (); | |
1745 | if (lpoint_byte < lpoint) | |
1746 | abort (); | |
1747 | ||
44fa5b1e | 1748 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
a2889657 JB |
1749 | |
1750 | /* If this is a combination window, do its children; that's all. */ | |
1751 | ||
265a9e55 | 1752 | if (!NILP (w->vchild)) |
a2889657 | 1753 | { |
f9c467a3 | 1754 | redisplay_windows (w->vchild, preserve_echo_area); |
a2889657 JB |
1755 | return; |
1756 | } | |
265a9e55 | 1757 | if (!NILP (w->hchild)) |
a2889657 | 1758 | { |
f9c467a3 | 1759 | redisplay_windows (w->hchild, preserve_echo_area); |
a2889657 JB |
1760 | return; |
1761 | } | |
265a9e55 | 1762 | if (NILP (w->buffer)) |
a2889657 | 1763 | abort (); |
8de2d90b JB |
1764 | |
1765 | height = window_internal_height (w); | |
4d641a15 | 1766 | update_mode_line = (!NILP (w->update_mode_line) || update_mode_lines); |
73af359d RS |
1767 | if (XBUFFER (w->buffer)->clip_changed) |
1768 | update_mode_line = 1; | |
8de2d90b JB |
1769 | |
1770 | if (MINI_WINDOW_P (w)) | |
1771 | { | |
73af359d RS |
1772 | if (w == XWINDOW (echo_area_window) && echo_area_glyphs) |
1773 | /* We've already displayed the echo area glyphs in this window. */ | |
1774 | goto finish_scroll_bars; | |
1775 | else if (w != XWINDOW (minibuf_window)) | |
8de2d90b | 1776 | { |
73af359d RS |
1777 | /* This is a minibuffer, but it's not the currently active one, |
1778 | so clear it. */ | |
1779 | int vpos = XFASTINT (w->top); | |
8de2d90b JB |
1780 | int i; |
1781 | ||
1782 | for (i = 0; i < height; i++) | |
1783 | { | |
44fa5b1e | 1784 | get_display_line (f, vpos + i, 0); |
73f194f1 RS |
1785 | display_string (w, vpos + i, "", 0, |
1786 | FRAME_LEFT_SCROLL_BAR_WIDTH (f), | |
a3788d53 | 1787 | 0, 1, 0, width, 0); |
8de2d90b JB |
1788 | } |
1789 | ||
88f22aff | 1790 | goto finish_scroll_bars; |
8de2d90b JB |
1791 | } |
1792 | } | |
a2889657 | 1793 | |
a2889657 JB |
1794 | /* Otherwise set up data on this window; select its buffer and point value */ |
1795 | ||
e481f960 | 1796 | if (update_mode_line) |
f72df6ac | 1797 | set_buffer_internal_1 (XBUFFER (w->buffer)); |
e481f960 RS |
1798 | else |
1799 | set_buffer_temp (XBUFFER (w->buffer)); | |
1800 | ||
ae3b1442 | 1801 | opoint = PT; |
12adba34 RS |
1802 | opoint_byte = PT_BYTE; |
1803 | ||
1804 | if (Z == Z_BYTE && opoint != opoint_byte) | |
1805 | abort (); | |
1806 | if (opoint_byte < opoint) | |
1807 | abort (); | |
a2889657 | 1808 | |
28995e67 RS |
1809 | /* If %c is in mode line, update it if needed. */ |
1810 | if (!NILP (w->column_number_displayed) | |
1811 | /* This alternative quickly identifies a common case | |
1812 | where no change is needed. */ | |
1813 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
1814 | && XFASTINT (w->last_modified) >= MODIFF |
1815 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
1816 | && XFASTINT (w->column_number_displayed) != current_column ()) |
1817 | update_mode_line = 1; | |
1818 | ||
42640f83 RS |
1819 | /* Count number of windows showing the selected buffer. |
1820 | An indirect buffer counts as its base buffer. */ | |
a2889657 | 1821 | |
42640f83 RS |
1822 | if (!just_this_one) |
1823 | { | |
1824 | struct buffer *current_base, *window_base; | |
1825 | current_base = current_buffer; | |
1826 | window_base = XBUFFER (XWINDOW (selected_window)->buffer); | |
1827 | if (current_base->base_buffer) | |
1828 | current_base = current_base->base_buffer; | |
1829 | if (window_base->base_buffer) | |
1830 | window_base = window_base->base_buffer; | |
1831 | if (current_base == window_base) | |
1832 | buffer_shared++; | |
1833 | } | |
a2889657 JB |
1834 | |
1835 | /* POINT refers normally to the selected window. | |
1836 | For any other window, set up appropriate value. */ | |
1837 | ||
1838 | if (!EQ (window, selected_window)) | |
1839 | { | |
12adba34 RS |
1840 | int new_pt = XMARKER (w->pointm)->charpos; |
1841 | int new_pt_byte = marker_byte_position (w->pointm); | |
f67a0f51 | 1842 | if (new_pt < BEGV) |
a2889657 | 1843 | { |
f67a0f51 | 1844 | new_pt = BEGV; |
12adba34 RS |
1845 | new_pt_byte = BEGV_BYTE; |
1846 | set_marker_both (w->pointm, Qnil, BEGV, BEGV_BYTE); | |
a2889657 | 1847 | } |
f67a0f51 | 1848 | else if (new_pt > (ZV - 1)) |
a2889657 | 1849 | { |
f67a0f51 | 1850 | new_pt = ZV; |
12adba34 RS |
1851 | new_pt_byte = ZV_BYTE; |
1852 | set_marker_both (w->pointm, Qnil, ZV, ZV_BYTE); | |
a2889657 | 1853 | } |
f67a0f51 | 1854 | /* We don't use SET_PT so that the point-motion hooks don't run. */ |
12adba34 | 1855 | TEMP_SET_PT_BOTH (new_pt, new_pt_byte); |
a2889657 JB |
1856 | } |
1857 | ||
f4faa47c JB |
1858 | /* If any of the character widths specified in the display table |
1859 | have changed, invalidate the width run cache. It's true that this | |
1860 | may be a bit late to catch such changes, but the rest of | |
1861 | redisplay goes (non-fatally) haywire when the display table is | |
1862 | changed, so why should we worry about doing any better? */ | |
1863 | if (current_buffer->width_run_cache) | |
1864 | { | |
f908610f | 1865 | struct Lisp_Char_Table *disptab = buffer_display_table (); |
f4faa47c JB |
1866 | |
1867 | if (! disptab_matches_widthtab (disptab, | |
1868 | XVECTOR (current_buffer->width_table))) | |
1869 | { | |
1870 | invalidate_region_cache (current_buffer, | |
1871 | current_buffer->width_run_cache, | |
1872 | BEG, Z); | |
1873 | recompute_width_table (current_buffer, disptab); | |
1874 | } | |
1875 | } | |
1876 | ||
a2889657 | 1877 | /* If window-start is screwed up, choose a new one. */ |
a2889657 JB |
1878 | if (XMARKER (w->start)->buffer != current_buffer) |
1879 | goto recenter; | |
1880 | ||
1881 | startp = marker_position (w->start); | |
12adba34 | 1882 | startp_byte = marker_byte_position (w->start); |
a2889657 | 1883 | |
cf0df6ab RS |
1884 | /* If someone specified a new starting point but did not insist, |
1885 | check whether it can be used. */ | |
1886 | if (!NILP (w->optional_new_start)) | |
1887 | { | |
1888 | w->optional_new_start = Qnil; | |
1889 | /* Check whether this start pos is usable given where point is. */ | |
1890 | ||
1891 | pos = *compute_motion (startp, 0, | |
1892 | (((EQ (window, minibuf_window) | |
1893 | && startp == BEG) | |
1894 | ? minibuf_prompt_width : 0) | |
1895 | + (hscroll ? 1 - hscroll : 0)), | |
1896 | 0, | |
1c9241f5 KH |
1897 | PT, height, |
1898 | /* BUG FIX: See the comment of | |
1899 | Fpos_visible_in_window_p (window.c). */ | |
1900 | - (1 << (BITS_PER_SHORT - 1)), | |
12adba34 RS |
1901 | width, hscroll, |
1902 | pos_tab_offset (w, startp, startp_byte), w); | |
cf0df6ab RS |
1903 | /* If PT does fit on the screen, we will use this start pos, |
1904 | so do so by setting force_start. */ | |
1905 | if (pos.bufpos == PT) | |
1906 | w->force_start = Qt; | |
1907 | } | |
1908 | ||
8de2d90b | 1909 | /* Handle case where place to start displaying has been specified, |
aa6d10fa | 1910 | unless the specified location is outside the accessible range. */ |
265a9e55 | 1911 | if (!NILP (w->force_start)) |
a2889657 | 1912 | { |
e63574d7 | 1913 | w->force_start = Qnil; |
aa6d10fa RS |
1914 | /* Forget any recorded base line for line number display. */ |
1915 | w->base_line_number = Qnil; | |
75c43375 RS |
1916 | /* Redisplay the mode line. Select the buffer properly for that. |
1917 | Also, run the hook window-scroll-functions | |
1918 | because we have scrolled. */ | |
e63574d7 RS |
1919 | /* Note, we do this after clearing force_start because |
1920 | if there's an error, it is better to forget about force_start | |
1921 | than to get into an infinite loop calling the hook functions | |
1922 | and having them get more errors. */ | |
75c43375 RS |
1923 | if (!update_mode_line |
1924 | || ! NILP (Vwindow_scroll_functions)) | |
e481f960 | 1925 | { |
75c43375 RS |
1926 | Lisp_Object temp[3]; |
1927 | ||
e481f960 | 1928 | set_buffer_temp (old); |
f72df6ac | 1929 | set_buffer_internal_1 (XBUFFER (w->buffer)); |
e481f960 RS |
1930 | update_mode_line = 1; |
1931 | w->update_mode_line = Qt; | |
75c43375 | 1932 | if (! NILP (Vwindow_scroll_functions)) |
3dcd07e3 KH |
1933 | { |
1934 | run_hook_with_args_2 (Qwindow_scroll_functions, window, | |
1935 | make_number (startp)); | |
1936 | startp = marker_position (w->start); | |
1937 | } | |
e481f960 | 1938 | } |
c2213350 | 1939 | XSETFASTINT (w->last_modified, 0); |
8850a573 | 1940 | XSETFASTINT (w->last_overlay_modified, 0); |
12adba34 RS |
1941 | if (startp < BEGV) startp = BEGV, startp_byte = BEGV_BYTE; |
1942 | if (startp > ZV) startp = ZV, startp = ZV_BYTE; | |
a2889657 JB |
1943 | try_window (window, startp); |
1944 | if (cursor_vpos < 0) | |
1945 | { | |
1946 | /* If point does not appear, move point so it does appear */ | |
1947 | pos = *compute_motion (startp, 0, | |
ca26e1c8 KH |
1948 | (((EQ (window, minibuf_window) |
1949 | && startp == BEG) | |
1950 | ? minibuf_prompt_width : 0) | |
1951 | + (hscroll ? 1 - hscroll : 0)), | |
1952 | 0, | |
1953 | ZV, height / 2, | |
68be917d | 1954 | - (1 << (BITS_PER_SHORT - 1)), |
12adba34 RS |
1955 | width, hscroll, |
1956 | pos_tab_offset (w, startp, startp_byte), | |
1957 | w); | |
1958 | TEMP_SET_PT_BOTH (pos.bufpos, pos.bytepos); | |
90adcf20 | 1959 | if (w != XWINDOW (selected_window)) |
12adba34 | 1960 | set_marker_both (w->pointm, Qnil, PT, PT_BYTE); |
a2889657 JB |
1961 | else |
1962 | { | |
9d6a6bb9 | 1963 | if (current_buffer == old) |
12adba34 RS |
1964 | { |
1965 | lpoint = PT; | |
1966 | lpoint_byte = PT_BYTE; | |
1967 | } | |
73f194f1 | 1968 | FRAME_CURSOR_X (f) = (WINDOW_LEFT_MARGIN (w) |
210e752f | 1969 | + minmax (0, pos.hpos, width)); |
44fa5b1e | 1970 | FRAME_CURSOR_Y (f) = pos.vpos + XFASTINT (w->top); |
a2889657 | 1971 | } |
df0b5ea1 RS |
1972 | /* If we are highlighting the region, |
1973 | then we just changed the region, so redisplay to show it. */ | |
df0b5ea1 RS |
1974 | if (!NILP (Vtransient_mark_mode) |
1975 | && !NILP (current_buffer->mark_active)) | |
6f27fa9b RS |
1976 | { |
1977 | cancel_my_columns (XWINDOW (window)); | |
1978 | try_window (window, startp); | |
1979 | } | |
a2889657 JB |
1980 | } |
1981 | goto done; | |
1982 | } | |
1983 | ||
1984 | /* Handle case where text has not changed, only point, | |
208aee63 | 1985 | and it has not moved off the frame. */ |
a2889657 JB |
1986 | |
1987 | /* This code is not used for minibuffer for the sake of | |
1988 | the case of redisplaying to replace an echo area message; | |
1989 | since in that case the minibuffer contents per se are usually unchanged. | |
1990 | This code is of no real use in the minibuffer since | |
1991 | the handling of this_line_bufpos, etc., | |
1992 | in redisplay handles the same cases. */ | |
1993 | ||
1994 | if (XFASTINT (w->last_modified) >= MODIFF | |
8850a573 | 1995 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF |
86bee31c | 1996 | && PT >= startp && !current_buffer->clip_changed |
73f194f1 | 1997 | && (just_this_one || WINDOW_FULL_WIDTH_P (w)) |
b1aa6cb3 RS |
1998 | /* If force-mode-line-update was called, really redisplay; |
1999 | that's how redisplay is forced after e.g. changing | |
2000 | buffer-invisibility-spec. */ | |
632ab665 | 2001 | && NILP (w->update_mode_line) |
bd66d1ba RS |
2002 | /* Can't use this case if highlighting a region. */ |
2003 | && !(!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active)) | |
2004 | && NILP (w->region_showing) | |
15495c73 KH |
2005 | /* If end pos is out of date, scroll bar and percentage will be wrong */ |
2006 | && INTEGERP (w->window_end_vpos) | |
2007 | && XFASTINT (w->window_end_vpos) < XFASTINT (w->height) | |
d45de95b | 2008 | && !EQ (window, minibuf_window) |
377dbd97 RS |
2009 | && (!MARKERP (Voverlay_arrow_position) |
2010 | || current_buffer != XMARKER (Voverlay_arrow_position)->buffer)) | |
a2889657 | 2011 | { |
377dbd97 RS |
2012 | /* All positions in this clause are relative to the window edge. */ |
2013 | ||
9afd2168 | 2014 | int this_scroll_margin = scroll_margin; |
9c5886e7 | 2015 | int last_point_y = XFASTINT (w->last_point_y) - XINT (w->top); |
377dbd97 | 2016 | int last_point_x = (XFASTINT (w->last_point_x) - WINDOW_LEFT_MARGIN (w)); |
9afd2168 | 2017 | |
4cb46737 | 2018 | /* Find where PT is located now on the frame. */ |
916848d8 RS |
2019 | /* Check just_this_one as a way of verifying that the |
2020 | window edges have not changed. */ | |
9c5886e7 | 2021 | if (PT == XFASTINT (w->last_point) && just_this_one) |
4cb46737 | 2022 | { |
916848d8 RS |
2023 | pos.hpos = last_point_x; |
2024 | pos.vpos = last_point_y; | |
4cb46737 RS |
2025 | pos.bufpos = PT; |
2026 | } | |
9c5886e7 | 2027 | else if (PT > XFASTINT (w->last_point) |
d802580c RS |
2028 | && XFASTINT (w->last_point) > startp && just_this_one |
2029 | /* We can't use this if point is in the left margin of a | |
2030 | hscrolled window, because w->last_point_x has been | |
2031 | clipped to the window edges. */ | |
2032 | && !(last_point_x <= 0 && hscroll)) | |
4cb46737 | 2033 | { |
9c5886e7 RS |
2034 | pos = *compute_motion (XFASTINT (w->last_point), |
2035 | last_point_y, last_point_x, 0, | |
4cb46737 RS |
2036 | PT, height, |
2037 | /* BUG FIX: See the comment of | |
2038 | Fpos_visible_in_window_p (window.c). */ | |
2039 | - (1 << (BITS_PER_SHORT - 1)), | |
2040 | width, hscroll, | |
12adba34 RS |
2041 | pos_tab_offset (w, startp, startp_byte), |
2042 | w); | |
4cb46737 RS |
2043 | } |
2044 | else | |
2045 | { | |
2046 | pos = *compute_motion (startp, 0, (hscroll ? 1 - hscroll : 0), 0, | |
2047 | PT, height, | |
2048 | /* BUG FIX: See the comment of | |
2049 | Fpos_visible_in_window_p (window.c). */ | |
2050 | - (1 << (BITS_PER_SHORT - 1)), | |
2051 | width, hscroll, | |
12adba34 RS |
2052 | pos_tab_offset (w, startp, startp_byte), |
2053 | w); | |
4cb46737 | 2054 | } |
a2889657 | 2055 | |
9afd2168 RS |
2056 | /* Don't use a scroll margin that is negative or too large. */ |
2057 | if (this_scroll_margin < 0) | |
2058 | this_scroll_margin = 0; | |
2059 | ||
2060 | if (XINT (w->height) < 4 * scroll_margin) | |
2061 | this_scroll_margin = XINT (w->height) / 4; | |
2062 | ||
2063 | /* If point fits on the screen, and not within the scroll margin, | |
2064 | we are ok. */ | |
2065 | if (pos.vpos < height - this_scroll_margin | |
2066 | && (pos.vpos >= this_scroll_margin || startp == BEGV)) | |
a2889657 | 2067 | { |
44fa5b1e JB |
2068 | /* Ok, point is still on frame */ |
2069 | if (w == XWINDOW (FRAME_SELECTED_WINDOW (f))) | |
a2889657 JB |
2070 | { |
2071 | /* These variables are supposed to be origin 1 */ | |
73f194f1 | 2072 | FRAME_CURSOR_X (f) = (WINDOW_LEFT_MARGIN (w) |
210e752f | 2073 | + minmax (0, pos.hpos, width)); |
44fa5b1e | 2074 | FRAME_CURSOR_Y (f) = pos.vpos + XFASTINT (w->top); |
a2889657 JB |
2075 | } |
2076 | /* This doesn't do the trick, because if a window to the right of | |
2077 | this one must be redisplayed, this does nothing because there | |
44fa5b1e | 2078 | is nothing in DesiredFrame yet, and then the other window is |
a2889657 | 2079 | redisplayed, making likes that are empty in this window's columns. |
73f194f1 | 2080 | if (WINDOW_FULL_WIDTH_P (w)) |
a2889657 JB |
2081 | preserve_my_columns (w); |
2082 | */ | |
abb4c08f KH |
2083 | if (current_buffer->clip_changed |
2084 | && ! NILP (Vwindow_scroll_functions)) | |
2085 | run_hook_with_args_2 (Qwindow_scroll_functions, window, | |
2086 | make_number (marker_position (w->start))); | |
2087 | ||
a2889657 JB |
2088 | goto done; |
2089 | } | |
2090 | /* Don't bother trying redisplay with same start; | |
2091 | we already know it will lose */ | |
2092 | } | |
2093 | /* If current starting point was originally the beginning of a line | |
2094 | but no longer is, find a new starting point. */ | |
265a9e55 | 2095 | else if (!NILP (w->start_at_line_beg) |
b16234d8 | 2096 | && !(startp <= BEGV |
12adba34 | 2097 | || FETCH_BYTE (startp_byte - 1) == '\n')) |
a2889657 JB |
2098 | { |
2099 | goto recenter; | |
2100 | } | |
2101 | else if (just_this_one && !MINI_WINDOW_P (w) | |
ae3b1442 | 2102 | && PT >= startp |
a2889657 | 2103 | && XFASTINT (w->last_modified) |
14709f21 JB |
2104 | /* or else vmotion on first line won't work. */ |
2105 | && ! NILP (w->start_at_line_beg) | |
a2889657 | 2106 | && ! EQ (w->window_end_valid, Qnil) |
86bee31c | 2107 | && do_id && !current_buffer->clip_changed |
a2889657 | 2108 | && !blank_end_of_window |
73f194f1 | 2109 | && WINDOW_FULL_WIDTH_P (w) |
bd66d1ba RS |
2110 | /* Can't use this case if highlighting a region. */ |
2111 | && !(!NILP (Vtransient_mark_mode) | |
2112 | && !NILP (current_buffer->mark_active)) | |
23c852cb KH |
2113 | /* Don't use try_window_id if newline |
2114 | doesn't display as the end of a line. */ | |
2115 | && !(dp != 0 && VECTORP (DISP_CHAR_VECTOR (dp, '\n'))) | |
bd66d1ba | 2116 | && NILP (w->region_showing) |
d45de95b | 2117 | && EQ (last_arrow_position, COERCE_MARKER (Voverlay_arrow_position)) |
a2889657 | 2118 | && EQ (last_arrow_string, Voverlay_arrow_string) |
44fa5b1e | 2119 | && (tem = try_window_id (FRAME_SELECTED_WINDOW (f))) |
a2889657 JB |
2120 | && tem != -2) |
2121 | { | |
2122 | /* tem > 0 means success. tem == -1 means choose new start. | |
2123 | tem == -2 means try again with same start, | |
2124 | and nothing but whitespace follows the changed stuff. | |
2125 | tem == 0 means try again with same start. */ | |
2126 | if (tem > 0) | |
2127 | goto done; | |
2128 | } | |
2129 | else if (startp >= BEGV && startp <= ZV | |
e9874cee RS |
2130 | && (startp < ZV |
2131 | /* Avoid starting at end of buffer. */ | |
2132 | #if 0 /* This change causes trouble for M-! finger & RET. | |
2133 | It will have to be considered later. */ | |
2134 | || ! EQ (window, selected_window) | |
2135 | /* Don't do the recentering if redisplay | |
2136 | is not for no user action. */ | |
2137 | || preserve_echo_area | |
2138 | #endif | |
2139 | || startp == BEGV | |
8850a573 RS |
2140 | || (XFASTINT (w->last_modified) >= MODIFF |
2141 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF))) | |
a2889657 JB |
2142 | { |
2143 | /* Try to redisplay starting at same place as before */ | |
44fa5b1e | 2144 | /* If point has not moved off frame, accept the results */ |
a2889657 JB |
2145 | try_window (window, startp); |
2146 | if (cursor_vpos >= 0) | |
aa6d10fa | 2147 | { |
28995e67 RS |
2148 | if (!just_this_one || current_buffer->clip_changed |
2149 | || beg_unchanged < startp) | |
aa6d10fa RS |
2150 | /* Forget any recorded base line for line number display. */ |
2151 | w->base_line_number = Qnil; | |
abb4c08f KH |
2152 | |
2153 | if (current_buffer->clip_changed | |
2154 | && ! NILP (Vwindow_scroll_functions)) | |
2155 | run_hook_with_args_2 (Qwindow_scroll_functions, window, | |
2156 | make_number (marker_position (w->start))); | |
2157 | ||
aa6d10fa RS |
2158 | goto done; |
2159 | } | |
a2889657 JB |
2160 | else |
2161 | cancel_my_columns (w); | |
2162 | } | |
2163 | ||
c2213350 | 2164 | XSETFASTINT (w->last_modified, 0); |
8850a573 | 2165 | XSETFASTINT (w->last_overlay_modified, 0); |
e481f960 RS |
2166 | /* Redisplay the mode line. Select the buffer properly for that. */ |
2167 | if (!update_mode_line) | |
2168 | { | |
2169 | set_buffer_temp (old); | |
f72df6ac | 2170 | set_buffer_internal_1 (XBUFFER (w->buffer)); |
e481f960 RS |
2171 | update_mode_line = 1; |
2172 | w->update_mode_line = Qt; | |
2173 | } | |
a2889657 JB |
2174 | |
2175 | /* Try to scroll by specified few lines */ | |
2176 | ||
0789adb2 RS |
2177 | if (scroll_conservatively && !current_buffer->clip_changed |
2178 | && startp >= BEGV && startp <= ZV) | |
2179 | { | |
f9c8af06 | 2180 | int this_scroll_margin = scroll_margin; |
44173109 | 2181 | int scroll_margin_pos; |
f9c8af06 RS |
2182 | |
2183 | /* Don't use a scroll margin that is negative or too large. */ | |
2184 | if (this_scroll_margin < 0) | |
2185 | this_scroll_margin = 0; | |
2186 | ||
44173109 | 2187 | if (XINT (w->height) < 4 * this_scroll_margin) |
f9c8af06 RS |
2188 | this_scroll_margin = XINT (w->height) / 4; |
2189 | ||
44173109 RS |
2190 | scroll_margin_pos = Z - XFASTINT (w->window_end_pos); |
2191 | if (this_scroll_margin) | |
2192 | { | |
2193 | pos = *vmotion (scroll_margin_pos, -this_scroll_margin, w); | |
2194 | scroll_margin_pos = pos.bufpos; | |
2195 | } | |
2196 | if (PT >= scroll_margin_pos) | |
0789adb2 RS |
2197 | { |
2198 | struct position pos; | |
44173109 | 2199 | pos = *compute_motion (scroll_margin_pos, 0, 0, 0, |
0789adb2 RS |
2200 | PT, XFASTINT (w->height), 0, |
2201 | XFASTINT (w->width), XFASTINT (w->hscroll), | |
12adba34 RS |
2202 | pos_tab_offset (w, startp, startp_byte), |
2203 | w); | |
0789adb2 RS |
2204 | if (pos.vpos > scroll_conservatively) |
2205 | goto scroll_fail_1; | |
2206 | ||
44173109 | 2207 | pos = *vmotion (startp, pos.vpos + 1, w); |
0789adb2 RS |
2208 | |
2209 | if (! NILP (Vwindow_scroll_functions)) | |
2210 | { | |
12adba34 | 2211 | set_marker_both (w->start, Qnil, pos.bufpos, pos.bytepos); |
0789adb2 RS |
2212 | run_hook_with_args_2 (Qwindow_scroll_functions, window, |
2213 | make_number (pos.bufpos)); | |
2214 | pos.bufpos = marker_position (w->start); | |
2215 | } | |
2216 | try_window (window, pos.bufpos); | |
2217 | if (cursor_vpos >= 0) | |
2218 | { | |
2219 | if (!just_this_one || current_buffer->clip_changed | |
2220 | || beg_unchanged < startp) | |
2221 | /* Forget any recorded base line for line number display. */ | |
2222 | w->base_line_number = Qnil; | |
2223 | goto done; | |
2224 | } | |
2225 | else | |
2226 | cancel_my_columns (w); | |
2227 | } | |
44173109 RS |
2228 | |
2229 | scroll_margin_pos = startp; | |
2230 | if (this_scroll_margin) | |
2231 | { | |
2232 | pos = *vmotion (scroll_margin_pos, this_scroll_margin, w); | |
2233 | scroll_margin_pos = pos.bufpos; | |
2234 | } | |
2235 | if (PT < scroll_margin_pos) | |
0789adb2 RS |
2236 | { |
2237 | struct position pos; | |
2238 | pos = *compute_motion (PT, 0, 0, 0, | |
44173109 | 2239 | scroll_margin_pos, XFASTINT (w->height), 0, |
0789adb2 | 2240 | XFASTINT (w->width), XFASTINT (w->hscroll), |
12adba34 RS |
2241 | pos_tab_offset (w, startp, startp_byte), |
2242 | w); | |
52bc7624 | 2243 | if (pos.vpos > scroll_conservatively) |
0789adb2 RS |
2244 | goto scroll_fail_1; |
2245 | ||
44173109 | 2246 | pos = *vmotion (startp, -pos.vpos, w); |
0789adb2 RS |
2247 | |
2248 | if (! NILP (Vwindow_scroll_functions)) | |
2249 | { | |
12adba34 | 2250 | set_marker_both (w->start, Qnil, pos.bufpos, pos.bytepos); |
0789adb2 RS |
2251 | run_hook_with_args_2 (Qwindow_scroll_functions, window, |
2252 | make_number (pos.bufpos)); | |
2253 | pos.bufpos = marker_position (w->start); | |
2254 | } | |
2255 | try_window (window, pos.bufpos); | |
2256 | if (cursor_vpos >= 0) | |
2257 | { | |
2258 | if (!just_this_one || current_buffer->clip_changed | |
2259 | || beg_unchanged < startp) | |
2260 | /* Forget any recorded base line for line number display. */ | |
2261 | w->base_line_number = Qnil; | |
2262 | goto done; | |
2263 | } | |
2264 | else | |
2265 | cancel_my_columns (w); | |
2266 | } | |
2267 | scroll_fail_1: ; | |
2268 | } | |
2269 | ||
2c081c2d KH |
2270 | if (scroll_step && !current_buffer->clip_changed |
2271 | && startp >= BEGV && startp <= ZV) | |
a2889657 | 2272 | { |
ae3b1442 | 2273 | if (PT > startp) |
a2889657 | 2274 | { |
210e752f | 2275 | pos = *vmotion (Z - XFASTINT (w->window_end_pos), scroll_step, w); |
a2889657 JB |
2276 | if (pos.vpos >= height) |
2277 | goto scroll_fail; | |
2278 | } | |
2279 | ||
210e752f | 2280 | pos = *vmotion (startp, (PT < startp ? - scroll_step : scroll_step), w); |
a2889657 | 2281 | |
ae3b1442 | 2282 | if (PT >= pos.bufpos) |
a2889657 | 2283 | { |
75c43375 | 2284 | if (! NILP (Vwindow_scroll_functions)) |
3dcd07e3 | 2285 | { |
12adba34 | 2286 | set_marker_both (w->start, Qnil, pos.bufpos, pos.bytepos); |
3dcd07e3 KH |
2287 | run_hook_with_args_2 (Qwindow_scroll_functions, window, |
2288 | make_number (pos.bufpos)); | |
2289 | pos.bufpos = marker_position (w->start); | |
2290 | } | |
a2889657 JB |
2291 | try_window (window, pos.bufpos); |
2292 | if (cursor_vpos >= 0) | |
aa6d10fa | 2293 | { |
28995e67 RS |
2294 | if (!just_this_one || current_buffer->clip_changed |
2295 | || beg_unchanged < startp) | |
aa6d10fa RS |
2296 | /* Forget any recorded base line for line number display. */ |
2297 | w->base_line_number = Qnil; | |
2298 | goto done; | |
2299 | } | |
a2889657 JB |
2300 | else |
2301 | cancel_my_columns (w); | |
2302 | } | |
2303 | scroll_fail: ; | |
2304 | } | |
2305 | ||
2306 | /* Finally, just choose place to start which centers point */ | |
2307 | ||
2308 | recenter: | |
aa6d10fa RS |
2309 | /* Forget any previously recorded base line for line number display. */ |
2310 | w->base_line_number = Qnil; | |
2311 | ||
210e752f | 2312 | pos = *vmotion (PT, - (height / 2), w); |
010494d0 KH |
2313 | |
2314 | /* The minibuffer is often just one line. Ordinary scrolling | |
2315 | gives little overlap and looks bad. So show 20 chars before point. */ | |
2316 | if (height == 1 | |
2317 | && (pos.bufpos >= PT - minibuffer_scroll_overlap | |
2318 | /* If we scrolled less than 1/2 line forward, we will | |
2319 | get too much overlap, so change to the usual amount. */ | |
2320 | || pos.bufpos < startp + width / 2) | |
2321 | && PT > BEGV + minibuffer_scroll_overlap | |
2322 | /* If we scrolled to an actual line boundary, | |
2323 | that's different; don't ignore line boundaries. */ | |
f1c87a7d | 2324 | && FETCH_BYTE (pos.bytepos - 1) != '\n') |
835766b6 RS |
2325 | { |
2326 | pos.bufpos = PT - minibuffer_scroll_overlap; | |
2327 | pos.bytepos = CHAR_TO_BYTE (pos.bufpos); | |
2328 | } | |
010494d0 | 2329 | |
e63574d7 RS |
2330 | /* Set startp here explicitly in case that helps avoid an infinite loop |
2331 | in case the window-scroll-functions functions get errors. */ | |
12adba34 | 2332 | set_marker_both (w->start, Qnil, pos.bufpos, pos.bytepos); |
75c43375 | 2333 | if (! NILP (Vwindow_scroll_functions)) |
3dcd07e3 KH |
2334 | { |
2335 | run_hook_with_args_2 (Qwindow_scroll_functions, window, | |
2336 | make_number (pos.bufpos)); | |
2337 | pos.bufpos = marker_position (w->start); | |
835766b6 | 2338 | pos.bytepos = marker_byte_position (w->start); |
3dcd07e3 | 2339 | } |
a2889657 JB |
2340 | try_window (window, pos.bufpos); |
2341 | ||
2342 | startp = marker_position (w->start); | |
12adba34 | 2343 | startp_byte = marker_byte_position (w->start); |
ca26e1c8 | 2344 | w->start_at_line_beg |
12adba34 | 2345 | = (startp == BEGV || FETCH_BYTE (startp_byte - 1) == '\n') ? Qt : Qnil; |
a2889657 JB |
2346 | |
2347 | done: | |
e481f960 | 2348 | if ((update_mode_line |
aa6d10fa RS |
2349 | /* If window not full width, must redo its mode line |
2350 | if the window to its side is being redone */ | |
73f194f1 | 2351 | || (!just_this_one && !WINDOW_FULL_WIDTH_P (w)) |
155ef550 KH |
2352 | || INTEGERP (w->base_line_pos) |
2353 | || (!NILP (w->column_number_displayed) | |
2354 | && XFASTINT (w->column_number_displayed) != current_column ())) | |
a2889657 JB |
2355 | && height != XFASTINT (w->height)) |
2356 | display_mode_line (w); | |
aa6d10fa RS |
2357 | if (! line_number_displayed |
2358 | && ! BUFFERP (w->base_line_pos)) | |
2359 | { | |
2360 | w->base_line_pos = Qnil; | |
2361 | w->base_line_number = Qnil; | |
2362 | } | |
a2889657 | 2363 | |
7ce2c095 | 2364 | /* When we reach a frame's selected window, redo the frame's menu bar. */ |
e481f960 | 2365 | if (update_mode_line |
d1e74921 | 2366 | && (FRAME_WINDOW_P (f) |
d3413a53 | 2367 | ? |
dc937613 | 2368 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) |
d3413a53 | 2369 | FRAME_EXTERNAL_MENU_BAR (f) |
76412d64 | 2370 | #else |
d3413a53 | 2371 | FRAME_MENU_BAR_LINES (f) > 0 |
76412d64 | 2372 | #endif |
d3413a53 | 2373 | : FRAME_MENU_BAR_LINES (f) > 0) |
7ce2c095 RS |
2374 | && EQ (FRAME_SELECTED_WINDOW (f), window)) |
2375 | display_menu_bar (w); | |
2376 | ||
88f22aff JB |
2377 | finish_scroll_bars: |
2378 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) | |
30c566e4 | 2379 | { |
b1d1124b | 2380 | int start, end, whole; |
30c566e4 | 2381 | |
b1d1124b | 2382 | /* Calculate the start and end positions for the current window. |
3505ea70 JB |
2383 | At some point, it would be nice to choose between scrollbars |
2384 | which reflect the whole buffer size, with special markers | |
2385 | indicating narrowing, and scrollbars which reflect only the | |
2386 | visible region. | |
2387 | ||
b1d1124b JB |
2388 | Note that minibuffers sometimes aren't displaying any text. */ |
2389 | if (! MINI_WINDOW_P (w) | |
2390 | || (w == XWINDOW (minibuf_window) && ! echo_area_glyphs)) | |
2391 | { | |
8a9311d7 | 2392 | whole = ZV - BEGV; |
4d641a15 | 2393 | start = marker_position (w->start) - BEGV; |
b1d1124b JB |
2394 | /* I don't think this is guaranteed to be right. For the |
2395 | moment, we'll pretend it is. */ | |
85f26be9 | 2396 | end = (Z - XINT (w->window_end_pos)) - BEGV; |
3505ea70 JB |
2397 | |
2398 | if (end < start) end = start; | |
8a9311d7 | 2399 | if (whole < (end - start)) whole = end - start; |
b1d1124b JB |
2400 | } |
2401 | else | |
2402 | start = end = whole = 0; | |
30c566e4 | 2403 | |
88f22aff | 2404 | /* Indicate what this scroll bar ought to be displaying now. */ |
7eb9ba41 | 2405 | (*set_vertical_scroll_bar_hook) (w, end - start, whole, start); |
30c566e4 | 2406 | |
88f22aff | 2407 | /* Note that we actually used the scroll bar attached to this window, |
30c566e4 | 2408 | so it shouldn't be deleted at the end of redisplay. */ |
88f22aff | 2409 | (*redeem_scroll_bar_hook) (w); |
30c566e4 | 2410 | } |
b1d1124b | 2411 | |
12adba34 | 2412 | TEMP_SET_PT_BOTH (opoint, opoint_byte); |
e481f960 | 2413 | if (update_mode_line) |
f72df6ac | 2414 | set_buffer_internal_1 (old); |
e481f960 RS |
2415 | else |
2416 | set_buffer_temp (old); | |
12adba34 | 2417 | TEMP_SET_PT_BOTH (lpoint, lpoint_byte); |
a2889657 JB |
2418 | } |
2419 | \f | |
2420 | /* Do full redisplay on one window, starting at position `pos'. */ | |
2421 | ||
2422 | static void | |
2423 | try_window (window, pos) | |
2424 | Lisp_Object window; | |
2425 | register int pos; | |
2426 | { | |
2427 | register struct window *w = XWINDOW (window); | |
2428 | register int height = window_internal_height (w); | |
2429 | register int vpos = XFASTINT (w->top); | |
2430 | register int last_text_vpos = vpos; | |
44fa5b1e | 2431 | FRAME_PTR f = XFRAME (w->frame); |
b1d1124b | 2432 | int width = window_internal_width (w) - 1; |
a2889657 JB |
2433 | struct position val; |
2434 | ||
9cbab4ff RS |
2435 | /* POS should never be out of range! */ |
2436 | if (pos < XBUFFER (w->buffer)->begv | |
2437 | || pos > XBUFFER (w->buffer)->zv) | |
2438 | abort (); | |
2439 | ||
12adba34 RS |
2440 | if (XMARKER (w->start)->charpos != pos) |
2441 | Fset_marker (w->start, make_number (pos), Qnil); | |
2442 | ||
a2889657 JB |
2443 | cursor_vpos = -1; |
2444 | overlay_arrow_seen = 0; | |
ca26e1c8 | 2445 | zv_strings_seen = 0; |
a2889657 | 2446 | val.hpos = XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0; |
0f9c0ff0 | 2447 | val.ovstring_chars_done = 0; |
12adba34 RS |
2448 | val.bytepos = marker_byte_position (w->start); |
2449 | val.tab_offset = pos_tab_offset (w, pos, val.bytepos); | |
a2889657 JB |
2450 | |
2451 | while (--height >= 0) | |
2452 | { | |
12adba34 RS |
2453 | val = *display_text_line (w, pos, val.bytepos, vpos, |
2454 | val.hpos, val.tab_offset, | |
0f9c0ff0 | 2455 | val.ovstring_chars_done); |
1c9241f5 KH |
2456 | /* The following code is omitted because we maintain tab_offset |
2457 | in VAL. */ | |
2458 | #if 0 | |
a2889657 JB |
2459 | tab_offset += width; |
2460 | if (val.vpos) tab_offset = 0; | |
1c9241f5 | 2461 | #endif /* 0 */ |
a2889657 JB |
2462 | vpos++; |
2463 | if (pos != val.bufpos) | |
642eefc6 RS |
2464 | { |
2465 | int invis = 0; | |
e885523c | 2466 | #ifdef USE_TEXT_PROPERTIES |
642eefc6 RS |
2467 | Lisp_Object invis_prop; |
2468 | invis_prop = Fget_char_property (val.bufpos-1, Qinvisible, window); | |
2469 | invis = TEXT_PROP_MEANS_INVISIBLE (invis_prop); | |
e885523c | 2470 | #endif |
642eefc6 RS |
2471 | |
2472 | last_text_vpos | |
2473 | /* Next line, unless prev line ended in end of buffer with no cr */ | |
2474 | = vpos - (val.vpos | |
12adba34 | 2475 | && (FETCH_BYTE (val.bytepos - 1) != '\n' || invis)); |
642eefc6 | 2476 | } |
a2889657 JB |
2477 | pos = val.bufpos; |
2478 | } | |
2479 | ||
2480 | /* If last line is continued in middle of character, | |
44fa5b1e | 2481 | include the split character in the text considered on the frame */ |
a2889657 JB |
2482 | if (val.hpos < (XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0)) |
2483 | pos++; | |
2484 | ||
44fa5b1e | 2485 | /* If bottom just moved off end of frame, change mode line percentage. */ |
a2889657 JB |
2486 | if (XFASTINT (w->window_end_pos) == 0 |
2487 | && Z != pos) | |
2488 | w->update_mode_line = Qt; | |
2489 | ||
44fa5b1e | 2490 | /* Say where last char on frame will be, once redisplay is finished. */ |
c2213350 KH |
2491 | XSETFASTINT (w->window_end_pos, Z - pos); |
2492 | XSETFASTINT (w->window_end_vpos, last_text_vpos - XFASTINT (w->top)); | |
a2889657 JB |
2493 | /* But that is not valid info until redisplay finishes. */ |
2494 | w->window_end_valid = Qnil; | |
2495 | } | |
2496 | \f | |
2497 | /* Try to redisplay when buffer is modified locally, | |
2498 | computing insert/delete line to preserve text outside | |
2499 | the bounds of the changes. | |
2500 | Return 1 if successful, 0 if if cannot tell what to do, | |
2501 | or -1 to tell caller to find a new window start, | |
2502 | or -2 to tell caller to do normal redisplay with same window start. */ | |
2503 | ||
2504 | static int | |
2505 | try_window_id (window) | |
2506 | Lisp_Object window; | |
2507 | { | |
12adba34 RS |
2508 | int pos, pos_byte; |
2509 | int opoint, opoint_byte; | |
a2889657 JB |
2510 | register struct window *w = XWINDOW (window); |
2511 | register int height = window_internal_height (w); | |
44fa5b1e | 2512 | FRAME_PTR f = XFRAME (w->frame); |
a2889657 JB |
2513 | int top = XFASTINT (w->top); |
2514 | int start = marker_position (w->start); | |
b1d1124b | 2515 | int width = window_internal_width (w) - 1; |
a2889657 JB |
2516 | int hscroll = XINT (w->hscroll); |
2517 | int lmargin = hscroll > 0 ? 1 - hscroll : 0; | |
ca26e1c8 | 2518 | int did_motion; |
a2889657 JB |
2519 | register int vpos; |
2520 | register int i, tem; | |
2521 | int last_text_vpos = 0; | |
2522 | int stop_vpos; | |
e24c997d KH |
2523 | int selective = (INTEGERP (current_buffer->selective_display) |
2524 | ? XINT (current_buffer->selective_display) | |
2525 | : !NILP (current_buffer->selective_display) ? -1 : 0); | |
a2889657 JB |
2526 | struct position val, bp, ep, xp, pp; |
2527 | int scroll_amount = 0; | |
2528 | int delta; | |
1c9241f5 | 2529 | int epto, old_tick; |
a2889657 | 2530 | |
12adba34 RS |
2531 | int start_byte = marker_byte_position (w->start); |
2532 | ||
a2889657 JB |
2533 | if (GPT - BEG < beg_unchanged) |
2534 | beg_unchanged = GPT - BEG; | |
2535 | if (Z - GPT < end_unchanged) | |
2536 | end_unchanged = Z - GPT; | |
2537 | ||
6a1dc7ac | 2538 | if (beg_unchanged + BEG < start) |
a2889657 JB |
2539 | return 0; /* Give up if changes go above top of window */ |
2540 | ||
2541 | /* Find position before which nothing is changed. */ | |
ca26e1c8 | 2542 | bp = *compute_motion (start, 0, lmargin, 0, |
1c9241f5 KH |
2543 | min (ZV, beg_unchanged + BEG), height, |
2544 | /* BUG FIX: See the comment of | |
12adba34 | 2545 | Fpos_visible_in_window_p (window.c). */ |
1c9241f5 | 2546 | - (1 << (BITS_PER_SHORT - 1)), |
12adba34 RS |
2547 | width, hscroll, |
2548 | pos_tab_offset (w, start, start_byte), | |
2549 | w); | |
a2889657 | 2550 | if (bp.vpos >= height) |
6e8290aa | 2551 | { |
632ab665 | 2552 | if (PT < bp.bufpos) |
6e8290aa | 2553 | { |
67481ae5 RS |
2554 | /* All changes are beyond the window end, and point is on the screen. |
2555 | We don't need to change the text at all. | |
6e8290aa JB |
2556 | But we need to update window_end_pos to account for |
2557 | any change in buffer size. */ | |
ca26e1c8 | 2558 | bp = *compute_motion (start, 0, lmargin, 0, |
1c9241f5 KH |
2559 | ZV, height, |
2560 | /* BUG FIX: See the comment of | |
2561 | Fpos_visible_in_window_p() (window.c). */ | |
2562 | - (1 << (BITS_PER_SHORT - 1)), | |
12adba34 RS |
2563 | width, hscroll, |
2564 | pos_tab_offset (w, start, start_byte), w); | |
c2213350 KH |
2565 | XSETFASTINT (w->window_end_vpos, height); |
2566 | XSETFASTINT (w->window_end_pos, Z - bp.bufpos); | |
4d641a15 | 2567 | goto findpoint; |
6e8290aa JB |
2568 | } |
2569 | return 0; | |
2570 | } | |
a2889657 JB |
2571 | |
2572 | vpos = bp.vpos; | |
2573 | ||
44fa5b1e | 2574 | /* Find beginning of that frame line. Must display from there. */ |
210e752f | 2575 | bp = *vmotion (bp.bufpos, 0, w); |
a2889657 JB |
2576 | |
2577 | pos = bp.bufpos; | |
12adba34 | 2578 | pos_byte = bp.bytepos; |
a2889657 JB |
2579 | val.hpos = lmargin; |
2580 | if (pos < start) | |
2581 | return -1; | |
2582 | ||
ca26e1c8 | 2583 | did_motion = 0; |
a2889657 | 2584 | /* If about to start displaying at the beginning of a continuation line, |
44fa5b1e | 2585 | really start with previous frame line, in case it was not |
a2889657 | 2586 | continued when last redisplayed */ |
05ba02eb JB |
2587 | if ((bp.contin && bp.bufpos - 1 == beg_unchanged && vpos > 0) |
2588 | || | |
2589 | /* Likewise if we have to worry about selective display. */ | |
9f412332 | 2590 | (selective > 0 && bp.bufpos - 1 == beg_unchanged && vpos > 0)) |
a2889657 | 2591 | { |
210e752f | 2592 | bp = *vmotion (bp.bufpos, -1, w); |
a2889657 JB |
2593 | --vpos; |
2594 | pos = bp.bufpos; | |
12adba34 | 2595 | pos_byte = bp.bytepos; |
a2889657 | 2596 | } |
1c9241f5 | 2597 | val.tab_offset = bp.tab_offset; /* Update tab offset. */ |
a2889657 JB |
2598 | |
2599 | if (bp.contin && bp.hpos != lmargin) | |
2600 | { | |
2601 | val.hpos = bp.prevhpos - width + lmargin; | |
1c9241f5 | 2602 | val.tab_offset = bp.tab_offset + bp.prevhpos - width; |
ca26e1c8 | 2603 | did_motion = 1; |
93fdf93b | 2604 | DEC_BOTH (pos, pos_byte); |
a2889657 JB |
2605 | } |
2606 | ||
2607 | bp.vpos = vpos; | |
2608 | ||
2609 | /* Find first visible newline after which no more is changed. */ | |
12adba34 RS |
2610 | opoint = PT, opoint_byte = PT_BYTE; |
2611 | SET_PT (Z - max (end_unchanged, Z - ZV)); | |
2612 | scan_newline (PT, PT_BYTE, ZV, ZV_BYTE, 1, 1); | |
9f412332 | 2613 | if (selective > 0) |
12adba34 RS |
2614 | while (PT < ZV - 1 && indented_beyond_p (PT, PT_BYTE, selective)) |
2615 | scan_newline (PT, PT_BYTE, ZV, ZV_BYTE, 1, 1); | |
2616 | tem = PT; | |
2617 | SET_PT_BOTH (opoint, opoint_byte); | |
a2889657 JB |
2618 | |
2619 | /* Compute the cursor position after that newline. */ | |
ca26e1c8 | 2620 | ep = *compute_motion (pos, vpos, val.hpos, did_motion, tem, |
68be917d | 2621 | height, - (1 << (BITS_PER_SHORT - 1)), |
1c9241f5 KH |
2622 | width, hscroll, |
2623 | /* We have tab offset in VAL, use it. */ | |
2624 | val.tab_offset, w); | |
a2889657 | 2625 | |
44fa5b1e JB |
2626 | /* If changes reach past the text available on the frame, |
2627 | just display rest of frame. */ | |
a2889657 JB |
2628 | if (ep.bufpos > Z - XFASTINT (w->window_end_pos)) |
2629 | stop_vpos = height; | |
2630 | else | |
2631 | stop_vpos = ep.vpos; | |
2632 | ||
2633 | /* If no newline before ep, the line ep is on includes some changes | |
2634 | that must be displayed. Make sure we don't stop before it. */ | |
2635 | /* Also, if changes reach all the way until ep.bufpos, | |
2636 | it is possible that something was deleted after the | |
2637 | newline before it, so the following line must be redrawn. */ | |
2638 | if (stop_vpos == ep.vpos | |
2639 | && (ep.bufpos == BEGV | |
f1c87a7d | 2640 | || FETCH_BYTE (ep.bytepos - 1) != '\n' |
a2889657 JB |
2641 | || ep.bufpos == Z - end_unchanged)) |
2642 | stop_vpos = ep.vpos + 1; | |
2643 | ||
2644 | cursor_vpos = -1; | |
2645 | overlay_arrow_seen = 0; | |
ca26e1c8 | 2646 | zv_strings_seen = 0; |
a2889657 JB |
2647 | |
2648 | /* If changes do not reach to bottom of window, | |
2649 | figure out how much to scroll the rest of the window */ | |
2650 | if (stop_vpos < height) | |
2651 | { | |
2652 | /* Now determine how far up or down the rest of the window has moved */ | |
ca26e1c8 | 2653 | xp = *compute_motion (ep.bufpos, ep.vpos, ep.hpos, 1, |
a2889657 | 2654 | Z - XFASTINT (w->window_end_pos), |
1c9241f5 KH |
2655 | /* Don't care for VPOS... */ |
2656 | 1 << (BITS_PER_SHORT - 1), | |
2657 | /* ... nor HPOS. */ | |
2658 | 1 << (BITS_PER_SHORT - 1), | |
2659 | width, hscroll, ep.tab_offset, w); | |
a2889657 JB |
2660 | scroll_amount = xp.vpos - XFASTINT (w->window_end_vpos); |
2661 | ||
44fa5b1e | 2662 | /* Is everything on frame below the changes whitespace? |
a2889657 | 2663 | If so, no scrolling is really necessary. */ |
f1c87a7d | 2664 | for (i = ep.bytepos; i < xp.bytepos; i++) |
a2889657 | 2665 | { |
1c9241f5 | 2666 | tem = FETCH_BYTE (i); |
a2889657 JB |
2667 | if (tem != ' ' && tem != '\n' && tem != '\t') |
2668 | break; | |
2669 | } | |
f1c87a7d | 2670 | if (i == xp.bytepos) |
a2889657 JB |
2671 | return -2; |
2672 | ||
e8e536a9 KH |
2673 | XSETFASTINT (w->window_end_vpos, |
2674 | XFASTINT (w->window_end_vpos) + scroll_amount); | |
a2889657 | 2675 | |
44fa5b1e | 2676 | /* Before doing any scrolling, verify that point will be on frame. */ |
010a899e | 2677 | if (PT > ep.bufpos && !(PT <= xp.bufpos && xp.vpos < height)) |
a2889657 | 2678 | { |
ae3b1442 | 2679 | if (PT <= xp.bufpos) |
a2889657 | 2680 | { |
ca26e1c8 | 2681 | pp = *compute_motion (ep.bufpos, ep.vpos, ep.hpos, 1, |
68be917d | 2682 | PT, height, - (1 << (BITS_PER_SHORT - 1)), |
1c9241f5 KH |
2683 | width, hscroll, |
2684 | /* We have tab offset in EP, use it. */ | |
2685 | ep.tab_offset, w); | |
a2889657 JB |
2686 | } |
2687 | else | |
2688 | { | |
ca26e1c8 | 2689 | pp = *compute_motion (xp.bufpos, xp.vpos, xp.hpos, 1, |
68be917d | 2690 | PT, height, - (1 << (BITS_PER_SHORT - 1)), |
e37f06d7 | 2691 | width, hscroll, |
1c9241f5 KH |
2692 | /* We have tab offset in XP, use it. */ |
2693 | xp.tab_offset, w); | |
a2889657 | 2694 | } |
ae3b1442 | 2695 | if (pp.bufpos < PT || pp.vpos == height) |
a2889657 JB |
2696 | return 0; |
2697 | cursor_vpos = pp.vpos + top; | |
73f194f1 | 2698 | cursor_hpos = WINDOW_LEFT_MARGIN (w) + minmax (0, pp.hpos, width); |
a2889657 JB |
2699 | } |
2700 | ||
2701 | if (stop_vpos - scroll_amount >= height | |
2702 | || ep.bufpos == xp.bufpos) | |
2703 | { | |
2704 | if (scroll_amount < 0) | |
2705 | stop_vpos -= scroll_amount; | |
2706 | scroll_amount = 0; | |
2707 | /* In this path, we have altered window_end_vpos | |
2708 | and not left it negative. | |
2709 | We must make sure that, in case display is preempted | |
44fa5b1e | 2710 | before the frame changes to reflect what we do here, |
a2889657 | 2711 | further updates will not come to try_window_id |
44fa5b1e | 2712 | and assume the frame and window_end_vpos match. */ |
a2889657 JB |
2713 | blank_end_of_window = 1; |
2714 | } | |
2715 | else if (!scroll_amount) | |
0d231165 RS |
2716 | { |
2717 | /* Even if we don't need to scroll, we must adjust the | |
2718 | charstarts of subsequent lines (that we won't redisplay) | |
2719 | according to the amount of text inserted or deleted. */ | |
2720 | int oldpos = FRAME_CURRENT_GLYPHS (f)->charstarts[ep.vpos + top][0]; | |
2721 | int adjust = ep.bufpos - oldpos; | |
2722 | adjust_window_charstarts (w, ep.vpos + top - 1, adjust); | |
2723 | } | |
a2889657 JB |
2724 | else if (bp.bufpos == Z - end_unchanged) |
2725 | { | |
2726 | /* If reprinting everything is nearly as fast as scrolling, | |
2727 | don't bother scrolling. Can happen if lines are short. */ | |
44fa5b1e | 2728 | if (scroll_cost (f, bp.vpos + top - scroll_amount, |
a2889657 JB |
2729 | top + height - max (0, scroll_amount), |
2730 | scroll_amount) | |
2731 | > xp.bufpos - bp.bufpos - 20) | |
2732 | /* Return "try normal display with same window-start." | |
2733 | Too bad we can't prevent further scroll-thinking. */ | |
2734 | return -2; | |
2735 | /* If pure deletion, scroll up as many lines as possible. | |
2736 | In common case of killing a line, this can save the | |
2737 | following line from being overwritten by scrolling | |
2738 | and therefore having to be redrawn. */ | |
44fa5b1e | 2739 | tem = scroll_frame_lines (f, bp.vpos + top - scroll_amount, |
d1cb44a4 RS |
2740 | top + height - max (0, scroll_amount), |
2741 | scroll_amount, bp.bufpos); | |
d2f84654 RS |
2742 | if (!tem) |
2743 | stop_vpos = height; | |
2744 | else | |
2745 | { | |
2746 | /* scroll_frame_lines did not properly adjust subsequent | |
2747 | lines' charstarts in the case where the text of the | |
2748 | screen line at bp.vpos has changed. | |
2749 | (This can happen in a deletion that ends in mid-line.) | |
8e6208c5 KH |
2750 | To adjust properly, we need to make things consistent |
2751 | at the position ep. | |
d2f84654 RS |
2752 | So do a second adjust to make that happen. |
2753 | Note that stop_vpos >= ep.vpos, so it is sufficient | |
2754 | to update the charstarts for lines at ep.vpos and below. */ | |
2755 | int oldstart | |
2756 | = FRAME_CURRENT_GLYPHS (f)->charstarts[ep.vpos + top][0]; | |
2757 | adjust_window_charstarts (w, ep.vpos + top - 1, | |
2758 | ep.bufpos - oldstart); | |
2759 | } | |
a2889657 JB |
2760 | } |
2761 | else if (scroll_amount) | |
2762 | { | |
2763 | /* If reprinting everything is nearly as fast as scrolling, | |
2764 | don't bother scrolling. Can happen if lines are short. */ | |
2765 | /* Note that if scroll_amount > 0, xp.bufpos - bp.bufpos is an | |
2766 | overestimate of cost of reprinting, since xp.bufpos | |
2767 | would end up below the bottom of the window. */ | |
44fa5b1e | 2768 | if (scroll_cost (f, ep.vpos + top - scroll_amount, |
a2889657 JB |
2769 | top + height - max (0, scroll_amount), |
2770 | scroll_amount) | |
2771 | > xp.bufpos - ep.bufpos - 20) | |
2772 | /* Return "try normal display with same window-start." | |
2773 | Too bad we can't prevent further scroll-thinking. */ | |
2774 | return -2; | |
44fa5b1e | 2775 | tem = scroll_frame_lines (f, ep.vpos + top - scroll_amount, |
a2889657 | 2776 | top + height - max (0, scroll_amount), |
d1cb44a4 | 2777 | scroll_amount, ep.bufpos); |
a2889657 JB |
2778 | if (!tem) stop_vpos = height; |
2779 | } | |
2780 | } | |
2781 | ||
2782 | /* In any case, do not display past bottom of window */ | |
2783 | if (stop_vpos >= height) | |
2784 | { | |
2785 | stop_vpos = height; | |
2786 | scroll_amount = 0; | |
2787 | } | |
2788 | ||
2789 | /* Handle case where pos is before w->start -- | |
2790 | can happen if part of line had been clipped and is not clipped now */ | |
2791 | if (vpos == 0 && pos < marker_position (w->start)) | |
2792 | Fset_marker (w->start, make_number (pos), Qnil); | |
2793 | ||
12adba34 RS |
2794 | val.bytepos = pos_byte; |
2795 | ||
a2889657 JB |
2796 | /* Redisplay the lines where the text was changed */ |
2797 | last_text_vpos = vpos; | |
1c9241f5 KH |
2798 | /* The following code is omitted because we maintain tab offset in |
2799 | val.tab_offset. */ | |
2800 | #if 0 | |
12adba34 | 2801 | tab_offset = pos_tab_offset (w, pos, pos_byte); |
a2889657 JB |
2802 | /* If we are starting display in mid-character, correct tab_offset |
2803 | to account for passing the line that that character really starts in. */ | |
2804 | if (val.hpos < lmargin) | |
2805 | tab_offset += width; | |
1c9241f5 | 2806 | #endif /* 0 */ |
d3413a53 | 2807 | old_tick = MODIFF; |
a2889657 JB |
2808 | while (vpos < stop_vpos) |
2809 | { | |
12adba34 RS |
2810 | val = *display_text_line (w, pos, val.bytepos, top + vpos++, |
2811 | val.hpos, val.tab_offset, | |
0f9c0ff0 | 2812 | val.ovstring_chars_done); |
d3413a53 RS |
2813 | /* If display_text_line ran a hook and changed some text, |
2814 | redisplay all the way to bottom of buffer | |
2815 | So that we show the changes. */ | |
2816 | if (old_tick != MODIFF) | |
2817 | stop_vpos = height; | |
1c9241f5 KH |
2818 | /* The following code is omitted because we maintain tab offset |
2819 | in val.tab_offset. */ | |
2820 | #if 0 | |
a2889657 JB |
2821 | tab_offset += width; |
2822 | if (val.vpos) tab_offset = 0; | |
1c9241f5 | 2823 | #endif |
a2889657 JB |
2824 | if (pos != val.bufpos) |
2825 | last_text_vpos | |
2826 | /* Next line, unless prev line ended in end of buffer with no cr */ | |
f1c87a7d | 2827 | = vpos - (val.vpos && FETCH_BYTE (val.bytepos - 1) != '\n'); |
a2889657 JB |
2828 | pos = val.bufpos; |
2829 | } | |
2830 | ||
2831 | /* There are two cases: | |
2832 | 1) we have displayed down to the bottom of the window | |
2833 | 2) we have scrolled lines below stop_vpos by scroll_amount */ | |
2834 | ||
2835 | if (vpos == height) | |
2836 | { | |
2837 | /* If last line is continued in middle of character, | |
44fa5b1e | 2838 | include the split character in the text considered on the frame */ |
a2889657 JB |
2839 | if (val.hpos < lmargin) |
2840 | val.bufpos++; | |
c2213350 KH |
2841 | XSETFASTINT (w->window_end_vpos, last_text_vpos); |
2842 | XSETFASTINT (w->window_end_pos, Z - val.bufpos); | |
a2889657 JB |
2843 | } |
2844 | ||
2845 | /* If scrolling made blank lines at window bottom, | |
2846 | redisplay to fill those lines */ | |
2847 | if (scroll_amount < 0) | |
2848 | { | |
2849 | /* Don't consider these lines for general-purpose scrolling. | |
2850 | That will save time in the scrolling computation. */ | |
44fa5b1e | 2851 | FRAME_SCROLL_BOTTOM_VPOS (f) = xp.vpos; |
a2889657 JB |
2852 | vpos = xp.vpos; |
2853 | pos = xp.bufpos; | |
12adba34 | 2854 | pos_byte = xp.bytepos; |
1c9241f5 KH |
2855 | val.hpos = xp.hpos; |
2856 | val.tab_offset = xp.tab_offset; | |
a2889657 | 2857 | if (pos == ZV) |
010a899e KH |
2858 | { /* Display from next line */ |
2859 | vpos = height + scroll_amount; | |
2860 | val.hpos = lmargin; | |
2861 | val.tab_offset = 0; | |
2862 | } | |
a2889657 JB |
2863 | else if (xp.contin && xp.hpos != lmargin) |
2864 | { | |
2865 | val.hpos = xp.prevhpos - width + lmargin; | |
1c9241f5 | 2866 | val.tab_offset = xp.tab_offset + bp.prevhpos - width; |
93fdf93b | 2867 | DEC_BOTH (pos, pos_byte); |
a2889657 JB |
2868 | } |
2869 | ||
2870 | blank_end_of_window = 1; | |
1c9241f5 KH |
2871 | /* The following code is omitted because we maintain tab offset |
2872 | in val.tab_offset. */ | |
2873 | #if 0 | |
12adba34 | 2874 | tab_offset = pos_tab_offset (w, pos, pos_byte); |
a2889657 JB |
2875 | /* If we are starting display in mid-character, correct tab_offset |
2876 | to account for passing the line that that character starts in. */ | |
2877 | if (val.hpos < lmargin) | |
2878 | tab_offset += width; | |
1c9241f5 | 2879 | #endif |
f1c87a7d | 2880 | val.bytepos = pos_byte; |
a2889657 JB |
2881 | while (vpos < height) |
2882 | { | |
12adba34 RS |
2883 | val = *display_text_line (w, pos, val.bytepos, |
2884 | top + vpos++, val.hpos, | |
1c9241f5 KH |
2885 | val.tab_offset, val.ovstring_chars_done); |
2886 | /* The following code is omitted because we maintain tab | |
2887 | offset in val.tab_offset. */ | |
2888 | #if 0 | |
a2889657 JB |
2889 | tab_offset += width; |
2890 | if (val.vpos) tab_offset = 0; | |
1c9241f5 | 2891 | #endif /* 0 */ |
a2889657 JB |
2892 | pos = val.bufpos; |
2893 | } | |
2894 | ||
2895 | /* Here is a case where display_text_line sets cursor_vpos wrong. | |
2896 | Make it be fixed up, below. */ | |
2897 | if (xp.bufpos == ZV | |
ae3b1442 | 2898 | && xp.bufpos == PT) |
a2889657 JB |
2899 | cursor_vpos = -1; |
2900 | } | |
2901 | ||
44fa5b1e | 2902 | /* If bottom just moved off end of frame, change mode line percentage. */ |
a2889657 JB |
2903 | if (XFASTINT (w->window_end_pos) == 0 |
2904 | && Z != val.bufpos) | |
2905 | w->update_mode_line = Qt; | |
2906 | ||
2907 | /* Attempt to adjust end-of-text positions to new bottom line */ | |
2908 | if (scroll_amount) | |
2909 | { | |
2910 | delta = height - xp.vpos; | |
2911 | if (delta < 0 | |
2912 | || (delta > 0 && xp.bufpos <= ZV) | |
2913 | || (delta == 0 && xp.hpos)) | |
2914 | { | |
210e752f | 2915 | val = *vmotion (Z - XFASTINT (w->window_end_pos), delta, w); |
c2213350 | 2916 | XSETFASTINT (w->window_end_pos, Z - val.bufpos); |
e8e536a9 KH |
2917 | XSETFASTINT (w->window_end_vpos, |
2918 | XFASTINT (w->window_end_vpos) + val.vpos); | |
a2889657 JB |
2919 | } |
2920 | } | |
2921 | ||
2922 | w->window_end_valid = Qnil; | |
2923 | ||
2924 | /* If point was not in a line that was displayed, find it */ | |
2925 | if (cursor_vpos < 0) | |
2926 | { | |
4d641a15 | 2927 | findpoint: |
1c9241f5 KH |
2928 | val = *compute_motion (start, 0, lmargin, 0, PT, |
2929 | /* Don't care for VPOS... */ | |
2930 | 1 << (BITS_PER_SHORT - 1), | |
2931 | /* ... nor HPOS. */ | |
2932 | 1 << (BITS_PER_SHORT - 1), | |
12adba34 RS |
2933 | width, hscroll, |
2934 | pos_tab_offset (w, start, start_byte), | |
2935 | w); | |
44fa5b1e | 2936 | /* Admit failure if point is off frame now */ |
a2889657 JB |
2937 | if (val.vpos >= height) |
2938 | { | |
2939 | for (vpos = 0; vpos < height; vpos++) | |
44fa5b1e | 2940 | cancel_line (vpos + top, f); |
a2889657 JB |
2941 | return 0; |
2942 | } | |
2943 | cursor_vpos = val.vpos + top; | |
73f194f1 | 2944 | cursor_hpos = WINDOW_LEFT_MARGIN (w) + minmax (0, val.hpos, width); |
a2889657 JB |
2945 | } |
2946 | ||
210e752f | 2947 | FRAME_CURSOR_X (f) = cursor_hpos; |
44fa5b1e | 2948 | FRAME_CURSOR_Y (f) = cursor_vpos; |
a2889657 JB |
2949 | |
2950 | if (debug_end_pos) | |
2951 | { | |
ca26e1c8 | 2952 | val = *compute_motion (start, 0, lmargin, 0, ZV, |
68be917d | 2953 | height, - (1 << (BITS_PER_SHORT - 1)), |
12adba34 RS |
2954 | width, hscroll, |
2955 | pos_tab_offset (w, start, start_byte), | |
2956 | w); | |
a2889657 JB |
2957 | if (val.vpos != XFASTINT (w->window_end_vpos)) |
2958 | abort (); | |
2959 | if (XFASTINT (w->window_end_pos) | |
2960 | != Z - val.bufpos) | |
2961 | abort (); | |
2962 | } | |
2963 | ||
2964 | return 1; | |
2965 | } | |
2966 | \f | |
278feba9 | 2967 | /* Copy LEN glyphs starting address FROM to the rope TO. |
f7430cb6 | 2968 | But don't actually copy the parts that would come in before S. |
278feba9 RS |
2969 | Value is TO, advanced past the copied data. |
2970 | F is the frame we are displaying in. */ | |
a2889657 | 2971 | |
278feba9 RS |
2972 | static GLYPH * |
2973 | copy_part_of_rope (f, to, s, from, len, face) | |
2974 | FRAME_PTR f; | |
2975 | register GLYPH *to; /* Copy to here. */ | |
a2889657 | 2976 | register GLYPH *s; /* Starting point. */ |
278feba9 RS |
2977 | Lisp_Object *from; /* Data to copy. */ |
2978 | int len; | |
1c2250c2 | 2979 | int face; /* Face to apply to glyphs which don't specify one. */ |
a2889657 | 2980 | { |
278feba9 RS |
2981 | int n = len; |
2982 | register Lisp_Object *fp = from; | |
2983 | /* These cache the results of the last call to compute_glyph_face. */ | |
2984 | int last_code = -1; | |
2985 | int last_merged = 0; | |
c581d710 | 2986 | |
87485d6f | 2987 | #ifdef HAVE_FACES |
4cdc65eb KH |
2988 | if (! FRAME_TERMCAP_P (f)) |
2989 | while (n--) | |
2990 | { | |
e57bca5d | 2991 | GLYPH glyph = (INTEGERP (*fp) ? XFASTINT (*fp) : 0); |
4cdc65eb | 2992 | int facecode; |
e57bca5d KH |
2993 | unsigned int c = FAST_GLYPH_CHAR (glyph); |
2994 | ||
2995 | if (c > MAX_CHAR) | |
2996 | /* For an invalid character code, use space. */ | |
2997 | c = ' '; | |
4cdc65eb KH |
2998 | |
2999 | if (FAST_GLYPH_FACE (glyph) == 0) | |
3000 | /* If GLYPH has no face code, use FACE. */ | |
3001 | facecode = face; | |
3002 | else if (FAST_GLYPH_FACE (glyph) == last_code) | |
3003 | /* If it's same as previous glyph, use same result. */ | |
3004 | facecode = last_merged; | |
3005 | else | |
3006 | { | |
3007 | /* Merge this glyph's face and remember the result. */ | |
3008 | last_code = FAST_GLYPH_FACE (glyph); | |
3009 | last_merged = facecode = compute_glyph_face (f, last_code, face); | |
3010 | } | |
b2a76982 | 3011 | |
4cdc65eb | 3012 | if (to >= s) |
e57bca5d | 3013 | *to = FAST_MAKE_GLYPH (c, facecode); |
4cdc65eb KH |
3014 | ++to; |
3015 | ++fp; | |
3016 | } | |
3017 | else | |
3018 | #endif | |
3019 | while (n--) | |
3020 | { | |
dedd1182 | 3021 | if (to >= s) *to = (INTEGERP (*fp) ? XFASTINT (*fp) : 0); |
4cdc65eb KH |
3022 | ++to; |
3023 | ++fp; | |
3024 | } | |
278feba9 | 3025 | return to; |
c581d710 RS |
3026 | } |
3027 | ||
278feba9 RS |
3028 | /* Correct a glyph by replacing its specified user-level face code |
3029 | with a displayable computed face code. */ | |
c581d710 | 3030 | |
278feba9 | 3031 | static GLYPH |
659a218f | 3032 | fix_glyph (f, glyph, cface) |
278feba9 RS |
3033 | FRAME_PTR f; |
3034 | GLYPH glyph; | |
659a218f | 3035 | int cface; |
c581d710 | 3036 | { |
87485d6f | 3037 | #ifdef HAVE_FACES |
659a218f KH |
3038 | if (! FRAME_TERMCAP_P (f)) |
3039 | { | |
3040 | if (FAST_GLYPH_FACE (glyph) != 0) | |
3041 | cface = compute_glyph_face (f, FAST_GLYPH_FACE (glyph), cface); | |
3042 | glyph = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (glyph), cface); | |
3043 | } | |
4cdc65eb KH |
3044 | #endif |
3045 | return glyph; | |
a2889657 JB |
3046 | } |
3047 | \f | |
12adba34 RS |
3048 | /* Return the column of position POS / POS_BYTE in window W's buffer. |
3049 | The result is rounded down to a multiple of the internal width of W. | |
3050 | This is the amount of indentation of position POS | |
3051 | that is not visible in its horizontal position in the window. */ | |
3052 | ||
3053 | static int | |
3054 | pos_tab_offset (w, pos, pos_byte) | |
3055 | struct window *w; | |
3056 | register int pos, pos_byte; | |
3057 | { | |
3058 | int opoint = PT; | |
3059 | int opoint_byte = PT_BYTE; | |
3060 | int col; | |
3061 | int width = window_internal_width (w) - 1; | |
3062 | ||
3063 | if (pos == BEGV) | |
3064 | return MINI_WINDOW_P (w) ? -minibuf_prompt_width : 0; | |
3065 | ||
3066 | if (FETCH_BYTE (pos_byte - 1) == '\n') | |
3067 | return 0; | |
3068 | ||
3069 | TEMP_SET_PT_BOTH (pos, pos_byte); | |
3070 | col = current_column (); | |
3071 | TEMP_SET_PT_BOTH (opoint, opoint_byte); | |
3072 | ||
3073 | return col; | |
3074 | } | |
3075 | \f\f | |
3076 | /* Display one line of window W, starting at char position START in W's buffer. | |
3077 | START_BYTE is the corresponding byte position. | |
f4faa47c JB |
3078 | |
3079 | Display starting at horizontal position HPOS, expressed relative to | |
3080 | W's left edge. In situations where the text at START shouldn't | |
3081 | start at the left margin (i.e. when the window is hscrolled, or | |
3082 | we're continuing a line which left off in the midst of a | |
3083 | multi-column character), HPOS should be negative; we throw away | |
3084 | characters up 'til hpos = 0. So, HPOS must take hscrolling into | |
3085 | account. | |
a2889657 JB |
3086 | |
3087 | TABOFFSET is an offset for ostensible hpos, used in tab stop calculations. | |
3088 | ||
0f9c0ff0 RS |
3089 | OVSTR_DONE is the number of chars of overlay before/after strings |
3090 | at this position which have already been processed. | |
3091 | ||
f4faa47c JB |
3092 | Display on position VPOS on the frame. It is origin 0, relative to |
3093 | the top of the frame, not W. | |
a2889657 JB |
3094 | |
3095 | Returns a STRUCT POSITION giving character to start next line with | |
3096 | and where to display it, including a zero or negative hpos. | |
3097 | The vpos field is not really a vpos; it is 1 unless the line is continued */ | |
3098 | ||
3099 | struct position val_display_text_line; | |
3100 | ||
3101 | static struct position * | |
12adba34 | 3102 | display_text_line (w, start, start_byte, vpos, hpos, taboffset, ovstr_done) |
a2889657 JB |
3103 | struct window *w; |
3104 | int start; | |
3105 | int vpos; | |
3106 | int hpos; | |
3107 | int taboffset; | |
0f9c0ff0 | 3108 | int ovstr_done; |
a2889657 JB |
3109 | { |
3110 | register int pos = start; | |
12adba34 | 3111 | int pos_byte = start_byte; |
a2889657 JB |
3112 | register int c; |
3113 | register GLYPH *p1; | |
12adba34 | 3114 | int pause, limit_byte; |
a2889657 JB |
3115 | register unsigned char *p; |
3116 | GLYPH *endp; | |
d2f84654 | 3117 | register GLYPH *leftmargin; |
ca26e1c8 | 3118 | register GLYPH *p1prev; |
efc63ef0 | 3119 | register GLYPH *p1start; |
0d09d1e6 | 3120 | GLYPH *p1_wide_column_end = (GLYPH *) 0; |
12adba34 | 3121 | int prevpos, prevpos_byte; |
efc63ef0 | 3122 | int *charstart; |
44fa5b1e | 3123 | FRAME_PTR f = XFRAME (w->frame); |
a2889657 | 3124 | int tab_width = XINT (current_buffer->tab_width); |
265a9e55 | 3125 | int ctl_arrow = !NILP (current_buffer->ctl_arrow); |
b1d1124b | 3126 | int width = window_internal_width (w) - 1; |
a2889657 | 3127 | struct position val; |
12adba34 | 3128 | int lastpos, lastpos_byte; |
a2889657 | 3129 | int invis; |
642eefc6 RS |
3130 | int last_invis_skip = 0; |
3131 | Lisp_Object last_invis_prop; | |
a2889657 | 3132 | int hscroll = XINT (w->hscroll); |
d2f84654 RS |
3133 | int truncate = (hscroll |
3134 | || (truncate_partial_width_windows | |
73f194f1 | 3135 | && !WINDOW_FULL_WIDTH_P (w)) |
d2f84654 | 3136 | || !NILP (current_buffer->truncate_lines)); |
bd66d1ba | 3137 | |
409bb864 | 3138 | /* 1 if this buffer has a region to highlight. */ |
bd66d1ba | 3139 | int highlight_region |
2bf32c5d | 3140 | = (!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active) |
409bb864 | 3141 | && XMARKER (current_buffer->mark)->buffer != 0); |
bd66d1ba RS |
3142 | int region_beg, region_end; |
3143 | ||
e24c997d KH |
3144 | int selective = (INTEGERP (current_buffer->selective_display) |
3145 | ? XINT (current_buffer->selective_display) | |
3146 | : !NILP (current_buffer->selective_display) ? -1 : 0); | |
44fa5b1e | 3147 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (f); |
f908610f | 3148 | register struct Lisp_Char_Table *dp = window_display_table (w); |
68a37fa8 RS |
3149 | |
3150 | Lisp_Object default_invis_vector[3]; | |
642eefc6 RS |
3151 | /* Number of characters of ellipsis to display after an invisible line |
3152 | if it calls for an ellipsis. | |
3153 | Note that this value can be nonzero regardless of whether | |
3154 | selective display is enabled--you must check that separately. */ | |
a2889657 | 3155 | int selective_rlen |
642eefc6 | 3156 | = (dp && VECTORP (DISP_INVIS_VECTOR (dp)) |
68a37fa8 | 3157 | ? XVECTOR (DISP_INVIS_VECTOR (dp))->size |
642eefc6 | 3158 | : !NILP (current_buffer->selective_display_ellipses) ? 3 : 0); |
68a37fa8 RS |
3159 | /* This is the sequence of Lisp objects to display |
3160 | when there are invisible lines. */ | |
3161 | Lisp_Object *invis_vector_contents | |
e24c997d | 3162 | = (dp && VECTORP (DISP_INVIS_VECTOR (dp)) |
68a37fa8 RS |
3163 | ? XVECTOR (DISP_INVIS_VECTOR (dp))->contents |
3164 | : default_invis_vector); | |
3165 | ||
e24c997d | 3166 | GLYPH truncator = (dp == 0 || !INTEGERP (DISP_TRUNC_GLYPH (dp)) |
e57bca5d | 3167 | || !GLYPH_CHAR_VALID_P (XINT (DISP_TRUNC_GLYPH (dp))) |
278feba9 | 3168 | ? '$' : XINT (DISP_TRUNC_GLYPH (dp))); |
e24c997d | 3169 | GLYPH continuer = (dp == 0 || !INTEGERP (DISP_CONTINUE_GLYPH (dp)) |
e57bca5d | 3170 | || !GLYPH_CHAR_VALID_P (XINT (DISP_CONTINUE_GLYPH (dp))) |
278feba9 | 3171 | ? '\\' : XINT (DISP_CONTINUE_GLYPH (dp))); |
a2889657 | 3172 | |
1c9241f5 KH |
3173 | /* If 1, we must handle multibyte characters. */ |
3174 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); | |
3175 | /* Length of multibyte form of each character. */ | |
3176 | int len; | |
3177 | /* Glyphs generated should be set this bit mask if text must be | |
3178 | displayed from right to left. */ | |
3179 | GLYPH rev_dir_bit = (NILP (current_buffer->direction_reversed) | |
3180 | ? 0 : GLYPH_MASK_REV_DIR); | |
3181 | ||
31b24551 JB |
3182 | /* The next buffer location at which the face should change, due |
3183 | to overlays or text property changes. */ | |
3184 | int next_face_change; | |
3185 | ||
ca26e1c8 KH |
3186 | /* The next location where the `invisible' property changes, or an |
3187 | overlay starts or ends. */ | |
3188 | int next_boundary; | |
3189 | ||
31b24551 | 3190 | /* The face we're currently using. */ |
1c2250c2 | 3191 | int current_face = 0; |
efc63ef0 | 3192 | int i; |
31b24551 | 3193 | |
c2213350 | 3194 | XSETFASTINT (default_invis_vector[2], '.'); |
68a37fa8 RS |
3195 | default_invis_vector[0] = default_invis_vector[1] = default_invis_vector[2]; |
3196 | ||
73f194f1 | 3197 | get_display_line (f, vpos, WINDOW_LEFT_MARGIN (w)); |
54ff581a | 3198 | if (tab_width <= 0 || tab_width > 1000) tab_width = 8; |
a2889657 | 3199 | |
bd66d1ba | 3200 | /* Show where to highlight the region. */ |
409bb864 | 3201 | if (highlight_region |
fba9ce76 RS |
3202 | /* Maybe highlight only in selected window. */ |
3203 | && (highlight_nonselected_windows | |
409bb864 KH |
3204 | || w == XWINDOW (selected_window) |
3205 | || (MINI_WINDOW_P (XWINDOW (selected_window)) | |
3206 | && w == XWINDOW (Vminibuf_scroll_window)))) | |
bd66d1ba RS |
3207 | { |
3208 | region_beg = marker_position (current_buffer->mark); | |
3209 | if (PT < region_beg) | |
3210 | { | |
3211 | region_end = region_beg; | |
3212 | region_beg = PT; | |
3213 | } | |
3214 | else | |
3215 | region_end = PT; | |
3216 | w->region_showing = Qt; | |
3217 | } | |
3218 | else | |
3ee4159a RS |
3219 | { |
3220 | region_beg = region_end = -1; | |
3221 | w->region_showing = Qnil; | |
3222 | } | |
bd66d1ba | 3223 | |
f4faa47c | 3224 | if (MINI_WINDOW_P (w) |
ca26e1c8 | 3225 | && start == BEG |
a2889657 JB |
3226 | && vpos == XFASTINT (w->top)) |
3227 | { | |
8c5b6a0a | 3228 | if (! NILP (minibuf_prompt)) |
f7b4b63a | 3229 | { |
12a274bf RS |
3230 | int old_width = minibuf_prompt_width; |
3231 | ||
f7b4b63a | 3232 | minibuf_prompt_width |
8c5b6a0a | 3233 | = (display_string (w, vpos, XSTRING (minibuf_prompt)->data, |
fc932ac6 | 3234 | STRING_BYTES (XSTRING (minibuf_prompt)), |
377dbd97 | 3235 | hpos + WINDOW_LEFT_MARGIN (w), |
ce006f69 RS |
3236 | /* Display a space if we truncate. */ |
3237 | ' ', | |
3238 | 1, -1, | |
3239 | /* Truncate the prompt a little before the | |
3240 | margin, so user input can at least start | |
3241 | on the first line. */ | |
8bb6ca14 | 3242 | (XFASTINT (w->width) > 10 |
a3788d53 | 3243 | ? XFASTINT (w->width) - 4 : -1), |
0a9dc68b | 3244 | STRING_MULTIBYTE (minibuf_prompt)) |
377dbd97 | 3245 | - hpos - WINDOW_LEFT_MARGIN (w)); |
f7b4b63a | 3246 | hpos += minibuf_prompt_width; |
12a274bf | 3247 | taboffset -= minibuf_prompt_width - old_width; |
f7b4b63a KH |
3248 | } |
3249 | else | |
3250 | minibuf_prompt_width = 0; | |
a2889657 JB |
3251 | } |
3252 | ||
f4faa47c JB |
3253 | /* If we're hscrolled at all, use compute_motion to skip over any |
3254 | text off the left edge of the window. compute_motion may know | |
3255 | tricks to do this faster than we can. */ | |
3256 | if (hpos < 0) | |
3257 | { | |
3258 | struct position *left_edge | |
ca26e1c8 KH |
3259 | = compute_motion (pos, vpos, hpos, 0, |
3260 | ZV, vpos, 0, | |
f4faa47c JB |
3261 | width, hscroll, taboffset, w); |
3262 | ||
3263 | /* Retrieve the buffer position and column provided by | |
3264 | compute_motion. We can't assume that the column will be | |
3265 | zero, because you may have multi-column characters crossing | |
3266 | the left margin. | |
3267 | ||
3268 | compute_motion may have moved us past the screen position we | |
3269 | requested, if we hit a multi-column character, or the end of | |
3270 | the line. If so, back up. */ | |
3271 | if (left_edge->vpos > vpos | |
3272 | || left_edge->hpos > 0) | |
3273 | { | |
93fdf93b | 3274 | pos = left_edge->bufpos; |
0d09d1e6 | 3275 | pos_byte = left_edge->bytepos; |
93fdf93b | 3276 | DEC_BOTH (pos, pos_byte); |
f4faa47c JB |
3277 | hpos = left_edge->prevhpos; |
3278 | } | |
3279 | else | |
3280 | { | |
3281 | pos = left_edge->bufpos; | |
12adba34 | 3282 | pos_byte = left_edge->bytepos; |
f4faa47c JB |
3283 | hpos = left_edge->hpos; |
3284 | } | |
3285 | } | |
3286 | ||
377dbd97 RS |
3287 | hpos += WINDOW_LEFT_MARGIN (w); |
3288 | ||
f4faa47c | 3289 | desired_glyphs->bufp[vpos] = start; |
a2889657 | 3290 | p1 = desired_glyphs->glyphs[vpos] + hpos; |
efc63ef0 RS |
3291 | p1start = p1; |
3292 | charstart = desired_glyphs->charstarts[vpos] + hpos; | |
3293 | /* In case we don't ever write anything into it... */ | |
73f194f1 RS |
3294 | desired_glyphs->charstarts[vpos][WINDOW_LEFT_MARGIN (w)] = -1; |
3295 | leftmargin = desired_glyphs->glyphs[vpos] + WINDOW_LEFT_MARGIN (w); | |
d2f84654 | 3296 | endp = leftmargin + width; |
a2889657 | 3297 | |
1c2250c2 JB |
3298 | /* Arrange the overlays nicely for our purposes. Usually, we call |
3299 | display_text_line on only one line at a time, in which case this | |
3300 | can't really hurt too much, or we call it on lines which appear | |
3301 | one after another in the buffer, in which case all calls to | |
3302 | recenter_overlay_lists but the first will be pretty cheap. */ | |
3303 | recenter_overlay_lists (current_buffer, pos); | |
3304 | ||
a2889657 JB |
3305 | /* Loop generating characters. |
3306 | Stop at end of buffer, before newline, | |
31b24551 JB |
3307 | if reach or pass continuation column, |
3308 | or at face change. */ | |
a2889657 | 3309 | pause = pos; |
12adba34 | 3310 | limit_byte = pos_byte; |
31b24551 | 3311 | next_face_change = pos; |
ca26e1c8 KH |
3312 | next_boundary = pos; |
3313 | p1prev = p1; | |
3314 | prevpos = pos; | |
12adba34 | 3315 | prevpos_byte = pos_byte; |
1fca3fae RS |
3316 | |
3317 | /* If the window is hscrolled and point is in the invisible part of the | |
3318 | current line beyond the left margin we can record the cursor location | |
3319 | right away. */ | |
3320 | if (hscroll && start <= PT && PT < pos && cursor_vpos < 0) | |
3321 | { | |
3322 | cursor_vpos = vpos; | |
3323 | cursor_hpos = p1 - leftmargin; | |
3324 | } | |
3325 | ||
2384c010 | 3326 | while (p1 < endp) |
a2889657 | 3327 | { |
0d09d1e6 KH |
3328 | int eat_following_binary_data; |
3329 | ||
31b24551 | 3330 | if (pos >= pause) |
a2889657 | 3331 | { |
67481ae5 RS |
3332 | int e_t_h; |
3333 | ||
ca26e1c8 | 3334 | while (pos == next_boundary) |
a2889657 | 3335 | { |
ca26e1c8 KH |
3336 | Lisp_Object position, limit, prop, ww; |
3337 | ||
3338 | /* Display the overlay strings here, unless we're at ZV | |
3339 | and have already displayed the appropriate strings | |
3340 | on an earlier line. */ | |
3341 | if (pos < ZV || !zv_strings_seen++) | |
3342 | { | |
3343 | int ovlen; | |
b4222ffa | 3344 | unsigned char *ovstr; |
ca26e1c8 | 3345 | ovlen = overlay_strings (pos, w, &ovstr); |
0f9c0ff0 RS |
3346 | |
3347 | if (ovlen > 0) | |
ca26e1c8 | 3348 | { |
0f9c0ff0 RS |
3349 | /* Skip the ones we did in a previous line. */ |
3350 | ovstr += ovstr_done; | |
3351 | ovlen -= ovstr_done; | |
3352 | ||
1c9241f5 | 3353 | while (ovlen > 0) |
0f9c0ff0 | 3354 | { |
1c9241f5 KH |
3355 | int charset, cols; |
3356 | GLYPH g; | |
3357 | ||
3358 | if (multibyte) | |
3359 | { | |
3360 | c = STRING_CHAR_AND_LENGTH (ovstr, ovlen, len); | |
3361 | ovstr += len, ovlen -= len, ovstr_done += len; | |
3362 | charset = CHAR_CHARSET (c); | |
3363 | cols = (charset == CHARSET_COMPOSITION | |
3364 | ? cmpchar_table[COMPOSITE_CHAR_ID (c)]->width | |
3365 | : CHARSET_WIDTH (charset)); | |
3366 | } | |
3367 | else | |
3368 | { | |
3369 | c = *ovstr++, ovlen--, ovstr_done++; | |
3370 | cols = 1; | |
3371 | } | |
3372 | g = MAKE_GLYPH (f, c, current_face) | rev_dir_bit; | |
3373 | while (cols-- > 0) | |
3374 | { | |
3375 | if (p1 >= leftmargin && p1 < endp) | |
3376 | *p1 = g, g |= GLYPH_MASK_PADDING; | |
3377 | p1++; | |
3378 | } | |
0f9c0ff0 RS |
3379 | } |
3380 | /* If we did all the overlay strings | |
3381 | and we have room for text, clear ovstr_done | |
3382 | just for neatness' sake. */ | |
3383 | if (ovlen == 0 && p1 < endp) | |
3384 | ovstr_done = 0; | |
ca26e1c8 KH |
3385 | } |
3386 | } | |
3387 | ||
3388 | /* Did we reach point? Record the cursor location. */ | |
3389 | if (pos == PT && cursor_vpos < 0) | |
3390 | { | |
3391 | cursor_vpos = vpos; | |
3392 | cursor_hpos = p1 - leftmargin; | |
3393 | } | |
3394 | ||
3395 | if (pos >= ZV) | |
3396 | break; | |
a2889657 | 3397 | |
c2213350 | 3398 | XSETFASTINT (position, pos); |
ca26e1c8 KH |
3399 | limit = Fnext_overlay_change (position); |
3400 | #ifdef USE_TEXT_PROPERTIES | |
dfabd9a0 RS |
3401 | /* This is just an estimate to give reasonable |
3402 | performance; nothing should go wrong if it is too small. */ | |
fe3d6921 | 3403 | if (XFASTINT (limit) > pos + 50) |
1c9241f5 KH |
3404 | { |
3405 | int limitpos = pos + 50; | |
1c9241f5 KH |
3406 | XSETFASTINT (limit, limitpos); |
3407 | } | |
ca26e1c8 KH |
3408 | limit = Fnext_single_property_change (position, Qinvisible, |
3409 | Fcurrent_buffer (), limit); | |
3410 | #endif | |
3411 | next_boundary = XFASTINT (limit); | |
3412 | /* if the `invisible' property is set, we can skip to | |
3413 | the next property change. */ | |
3414 | XSETWINDOW (ww, w); | |
3415 | prop = Fget_char_property (position, Qinvisible, ww); | |
642eefc6 | 3416 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) |
dfabd9a0 | 3417 | { |
ca26e1c8 | 3418 | if (pos < PT && next_boundary >= PT) |
dfabd9a0 RS |
3419 | { |
3420 | cursor_vpos = vpos; | |
d2f84654 | 3421 | cursor_hpos = p1 - leftmargin; |
dfabd9a0 | 3422 | } |
ca26e1c8 | 3423 | pos = next_boundary; |
f6e7abc1 | 3424 | pos_byte = CHAR_TO_BYTE (pos); |
642eefc6 RS |
3425 | last_invis_skip = pos; |
3426 | last_invis_prop = prop; | |
dfabd9a0 | 3427 | } |
b0a0fbda | 3428 | } |
ca26e1c8 KH |
3429 | |
3430 | /* Did we reach point? Record the cursor location. */ | |
3431 | if (pos == PT && cursor_vpos < 0) | |
3432 | { | |
3433 | cursor_vpos = vpos; | |
3434 | cursor_hpos = p1 - leftmargin; | |
3435 | } | |
3436 | ||
3437 | /* Did we hit the end of the visible region of the buffer? | |
3438 | Stop here. */ | |
3439 | if (pos >= ZV) | |
eff87c2c RS |
3440 | { |
3441 | /* Update charstarts for the end of this line. */ | |
3442 | /* Do nothing if off the left edge or at the right edge. */ | |
3443 | if (p1 >= leftmargin && p1 + 1 != endp) | |
3444 | { | |
3445 | int *p2x = &charstart[(p1 < leftmargin | |
3446 | ? leftmargin : p1) | |
3447 | - p1start]; | |
3448 | *p2x++ = pos; | |
3449 | } | |
3450 | break; | |
3451 | } | |
b0a0fbda | 3452 | |
67481ae5 RS |
3453 | /* Figure out where (if at all) the |
3454 | redisplay_end_trigger-hook should run. */ | |
f6fd109b RS |
3455 | if (MARKERP (w->redisplay_end_trigger) |
3456 | && XMARKER (w->redisplay_end_trigger)->buffer != 0) | |
d3413a53 RS |
3457 | e_t_h = marker_position (w->redisplay_end_trigger); |
3458 | else if (INTEGERP (w->redisplay_end_trigger)) | |
3459 | e_t_h = XINT (w->redisplay_end_trigger); | |
67481ae5 RS |
3460 | else |
3461 | e_t_h = ZV; | |
3462 | ||
3463 | /* If we've gone past the place to run a hook, | |
3464 | run the hook. */ | |
3465 | if (pos >= e_t_h && e_t_h != ZV) | |
3466 | { | |
e0bfbde6 RS |
3467 | Lisp_Object args[3]; |
3468 | ||
3469 | args[0] = Qredisplay_end_trigger_functions; | |
3470 | XSETWINDOW (args[1], w); | |
3471 | XSETINT (args[2], e_t_h); | |
e0bfbde6 | 3472 | |
9c49d3d7 KH |
3473 | /* Since we are *trying* to run these functions, |
3474 | don't try to run them again, even if they get an error. */ | |
d3413a53 | 3475 | w->redisplay_end_trigger = Qnil; |
9c49d3d7 KH |
3476 | Frun_hook_with_args (3, args); |
3477 | ||
67481ae5 | 3478 | e_t_h = ZV; |
f6fd109b RS |
3479 | /* Notice if it changed the face of this character. */ |
3480 | next_face_change = pos; | |
67481ae5 RS |
3481 | } |
3482 | ||
f6fd109b RS |
3483 | #ifdef HAVE_FACES |
3484 | /* Did we hit a face change? Figure out what face we should | |
3485 | use now. We also hit this the first time through the | |
3486 | loop, to see what face we should start with. */ | |
ab6ce60e RS |
3487 | if (pos >= next_face_change |
3488 | && (FRAME_WINDOW_P (f) || FRAME_MSDOS_P (f))) | |
1c9241f5 KH |
3489 | { |
3490 | int limit = pos + 50; | |
3491 | ||
1c9241f5 KH |
3492 | current_face = compute_char_face (f, w, pos, |
3493 | region_beg, region_end, | |
3494 | &next_face_change, limit, 0); | |
3495 | } | |
f6fd109b RS |
3496 | #endif |
3497 | ||
67481ae5 RS |
3498 | /* Compute the next place we need to stop |
3499 | and do something special; set PAUSE. */ | |
3500 | ||
ca26e1c8 | 3501 | pause = ZV; |
1c2250c2 | 3502 | |
ca26e1c8 KH |
3503 | if (pos < next_boundary && next_boundary < pause) |
3504 | pause = next_boundary; | |
1c2250c2 JB |
3505 | if (pos < next_face_change && next_face_change < pause) |
3506 | pause = next_face_change; | |
3507 | ||
67481ae5 RS |
3508 | if (e_t_h < pause) |
3509 | pause = e_t_h; | |
3510 | ||
31b24551 JB |
3511 | /* Wouldn't you hate to read the next line to someone over |
3512 | the phone? */ | |
ae3b1442 KH |
3513 | if (pos < PT && PT < pause) |
3514 | pause = PT; | |
a2889657 JB |
3515 | if (pos < GPT && GPT < pause) |
3516 | pause = GPT; | |
3517 | ||
12adba34 RS |
3518 | /* LIMIT_BYTE is not the same place in the buffer as PAUSE. |
3519 | It is a limit on valid characters. | |
3520 | We use it to bound STRING_CHAR_AND_LENGTH. */ | |
3521 | limit_byte = ZV_BYTE; | |
3522 | if (pos < GPT && GPT_BYTE < limit_byte) | |
3523 | limit_byte = GPT_BYTE; | |
3524 | ||
3525 | { | |
3526 | int temp = CHAR_TO_BYTE (pos); | |
3527 | p = BYTE_POS_ADDR (temp); | |
3528 | } | |
a2889657 | 3529 | } |
ca26e1c8 | 3530 | |
ca26e1c8 KH |
3531 | if (p1 >= endp) |
3532 | break; | |
3533 | ||
3534 | p1prev = p1; | |
0d09d1e6 | 3535 | p1_wide_column_end = (GLYPH *) 0; |
ca26e1c8 | 3536 | |
1c9241f5 | 3537 | if (multibyte) |
12adba34 | 3538 | c = STRING_CHAR_AND_LENGTH (p, limit_byte - pos_byte, len), p += len; |
1c9241f5 KH |
3539 | else |
3540 | c = *p++, len = 1; | |
376b0e59 RS |
3541 | /* Let a display table override all standard display methods. */ |
3542 | if (dp != 0 && VECTORP (DISP_CHAR_VECTOR (dp, c))) | |
3543 | { | |
3544 | p1 = copy_part_of_rope (f, p1, leftmargin, | |
3545 | XVECTOR (DISP_CHAR_VECTOR (dp, c))->contents, | |
3546 | XVECTOR (DISP_CHAR_VECTOR (dp, c))->size, | |
1c9241f5 | 3547 | current_face, rev_dir_bit); |
376b0e59 RS |
3548 | } |
3549 | else if (c >= 040 && c < 0177) | |
a2889657 | 3550 | { |
d2f84654 | 3551 | if (p1 >= leftmargin) |
1c9241f5 | 3552 | *p1 = MAKE_GLYPH (f, c, current_face) | rev_dir_bit; |
a2889657 JB |
3553 | p1++; |
3554 | } | |
3555 | else if (c == '\n') | |
3556 | { | |
1842fc1a RS |
3557 | #if 0 |
3558 | /* Same as p1prev, but after the invis_vector_contents text | |
3559 | (if we have that on this line). */ | |
3560 | GLYPH *p1prev_modified; | |
3561 | #endif | |
3562 | ||
a2889657 | 3563 | invis = 0; |
642eefc6 RS |
3564 | if (last_invis_skip == pos |
3565 | && TEXT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS (last_invis_prop)) | |
3566 | invis = 1; | |
ca26e1c8 | 3567 | while (pos + 1 < ZV |
a2889657 | 3568 | && selective > 0 |
12adba34 | 3569 | && indented_beyond_p (pos + 1, pos_byte + 1, selective)) |
a2889657 | 3570 | { |
12adba34 RS |
3571 | int opoint = PT, opoint_byte = PT_BYTE; |
3572 | ||
a2889657 | 3573 | invis = 1; |
9ce37c9d | 3574 | INC_BOTH (pos, pos_byte); |
12adba34 RS |
3575 | scan_newline (pos, pos_byte, ZV, ZV_BYTE, 1, 1); |
3576 | if (FETCH_BYTE (pos_byte - 1) == '\n') | |
3577 | { | |
3578 | pos--; | |
3579 | pos_byte--; | |
3580 | } | |
3581 | SET_PT_BOTH (opoint, opoint_byte); | |
a2889657 | 3582 | } |
d2f84654 | 3583 | if (invis && selective_rlen > 0 && p1 >= leftmargin) |
a2889657 | 3584 | { |
1842fc1a RS |
3585 | #if 0 |
3586 | GLYPH *cs, *csend; | |
3587 | ||
3588 | cs = charstart + (p1 - p1start); | |
3589 | #endif | |
3590 | ||
a2889657 | 3591 | p1 += selective_rlen; |
d2f84654 | 3592 | if (p1 - leftmargin > width) |
a2889657 | 3593 | p1 = endp; |
1842fc1a RS |
3594 | |
3595 | #if 0 /* This needs more work; charstarts needs to record | |
3596 | both whether a position ho;ds an ellipsis character | |
3597 | and what buffer position it corresponds to. */ | |
3598 | csend = charstart + (p1 - p1start); | |
3599 | while (cs != csend) | |
3600 | *cs++ = -2; | |
3601 | /* The idea is to use p1prev_modified instead of p1prev | |
3602 | in the loop below over p2x. */ | |
3603 | p1prev_modified = p1; | |
3604 | #endif | |
3605 | ||
278feba9 | 3606 | copy_part_of_rope (f, p1prev, p1prev, invis_vector_contents, |
1c9241f5 | 3607 | (p1 - p1prev), current_face, rev_dir_bit); |
a2889657 | 3608 | } |
545e04f6 KH |
3609 | |
3610 | /* Update charstarts for the newline that ended this line. */ | |
3611 | /* Do nothing here for a char that's entirely off the left edge | |
3612 | or if it starts at the right edge. */ | |
3613 | if (p1 >= leftmargin && p1prev != endp) | |
3614 | { | |
3615 | /* Store the newline's position into charstarts | |
3616 | for the column where the newline starts. | |
3617 | Store -1 for the rest of the glyphs it occupies. */ | |
3618 | int *p2x = &charstart[(p1prev < leftmargin | |
3619 | ? leftmargin : p1prev) | |
3620 | - p1start]; | |
3621 | int *p2 = &charstart[(p1 < endp ? p1 : endp) - p1start]; | |
3622 | ||
3623 | *p2x++ = pos; | |
3624 | while (p2x < p2) | |
3625 | *p2x++ = -1; | |
3626 | } | |
1842fc1a RS |
3627 | #ifdef HAVE_FACES |
3628 | /* Draw the face of the newline character as extending all the | |
3629 | way to the end of the frame line. */ | |
3630 | if (current_face) | |
3631 | { | |
3632 | if (p1 < leftmargin) | |
3633 | p1 = leftmargin; | |
3634 | while (p1 < endp) | |
3635 | *p1++ = FAST_MAKE_GLYPH (' ', current_face) | rev_dir_bit; | |
3636 | } | |
3637 | #endif | |
545e04f6 | 3638 | |
68a37fa8 | 3639 | break; |
a2889657 JB |
3640 | } |
3641 | else if (c == '\t') | |
3642 | { | |
3643 | do | |
3644 | { | |
d2f84654 | 3645 | if (p1 >= leftmargin && p1 < endp) |
1c9241f5 | 3646 | *p1 = MAKE_GLYPH (f, ' ', current_face) | rev_dir_bit; |
a2889657 JB |
3647 | p1++; |
3648 | } | |
d2f84654 | 3649 | while ((p1 - leftmargin + taboffset + hscroll - (hscroll > 0)) |
a2889657 JB |
3650 | % tab_width); |
3651 | } | |
6e8290aa | 3652 | else if (c == Ctl ('M') && selective == -1) |
a2889657 | 3653 | { |
12adba34 RS |
3654 | int opoint = PT, opoint_byte = PT_BYTE; |
3655 | scan_newline (pos, pos_byte, ZV, ZV_BYTE, 1, 1); | |
3656 | pos = PT, pos_byte = PT_BYTE; | |
3657 | SET_PT_BOTH (opoint, opoint_byte); | |
3658 | ||
3659 | if (FETCH_BYTE (pos_byte - 1) == '\n') | |
3660 | pos--, pos_byte--; | |
a2889657 JB |
3661 | if (selective_rlen > 0) |
3662 | { | |
3663 | p1 += selective_rlen; | |
d2f84654 | 3664 | if (p1 - leftmargin > width) |
a2889657 | 3665 | p1 = endp; |
278feba9 | 3666 | copy_part_of_rope (f, p1prev, p1prev, invis_vector_contents, |
1c9241f5 | 3667 | (p1 - p1prev), current_face, rev_dir_bit); |
a2889657 | 3668 | } |
87485d6f | 3669 | #ifdef HAVE_FACES |
3c5c35c5 JB |
3670 | /* Draw the face of the newline character as extending all the |
3671 | way to the end of the frame line. */ | |
3672 | if (current_face) | |
1105ff20 KH |
3673 | { |
3674 | if (p1 < leftmargin) | |
3675 | p1 = leftmargin; | |
3676 | while (p1 < endp) | |
1c9241f5 | 3677 | *p1++ = FAST_MAKE_GLYPH (' ', current_face) | rev_dir_bit; |
1105ff20 | 3678 | } |
3c5c35c5 | 3679 | #endif |
545e04f6 KH |
3680 | |
3681 | /* Update charstarts for the ^M that ended this line. */ | |
3682 | /* Do nothing here for a char that's entirely off the left edge | |
3683 | or if it starts at the right edge. */ | |
3684 | if (p1 >= leftmargin && p1prev != endp) | |
3685 | { | |
3686 | /* Store the newline's position into charstarts | |
3687 | for the column where the newline starts. | |
3688 | Store -1 for the rest of the glyphs it occupies. */ | |
3689 | int *p2x = &charstart[(p1prev < leftmargin | |
3690 | ? leftmargin : p1prev) | |
3691 | - p1start]; | |
3692 | int *p2 = &charstart[(p1 < endp ? p1 : endp) - p1start]; | |
3693 | ||
3694 | *p2x++ = pos; | |
3695 | while (p2x < p2) | |
3696 | *p2x++ = -1; | |
3697 | } | |
68a37fa8 | 3698 | break; |
a2889657 | 3699 | } |
a2889657 JB |
3700 | else if (c < 0200 && ctl_arrow) |
3701 | { | |
d2f84654 | 3702 | if (p1 >= leftmargin) |
e57bca5d KH |
3703 | *p1 = (fix_glyph |
3704 | (f, (dp && INTEGERP (DISP_CTRL_GLYPH (dp)) | |
3705 | && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (dp))) | |
3706 | ? XINT (DISP_CTRL_GLYPH (dp)) : '^'), | |
3707 | current_face) | |
1c9241f5 | 3708 | | rev_dir_bit); |
a2889657 | 3709 | p1++; |
d2f84654 | 3710 | if (p1 >= leftmargin && p1 < endp) |
1c9241f5 | 3711 | *p1 = MAKE_GLYPH (f, c ^ 0100, current_face) | rev_dir_bit; |
a2889657 JB |
3712 | p1++; |
3713 | } | |
1c9241f5 | 3714 | else if (len == 1) |
a2889657 | 3715 | { |
1c9241f5 | 3716 | /* C is not a multibyte character. */ |
0d09d1e6 KH |
3717 | eat_following_binary_data = multibyte && BASE_LEADING_CODE_P (c); |
3718 | ||
3719 | label_display_binary_data: | |
3720 | do { | |
3721 | if (p1 >= leftmargin && p1 < endp) | |
3722 | *p1 = (fix_glyph | |
3723 | (f, (dp && INTEGERP (DISP_ESCAPE_GLYPH (dp)) | |
3724 | && GLYPH_CHAR_VALID_P (XINT (DISP_ESCAPE_GLYPH (dp))) | |
3725 | ? XINT (DISP_ESCAPE_GLYPH (dp)) : '\\'), | |
3726 | current_face) | |
3727 | | rev_dir_bit); | |
3728 | p1++; | |
3729 | if (p1 >= leftmargin && p1 < endp) | |
3730 | *p1 = MAKE_GLYPH (f, (c >> 6) + '0', current_face) | rev_dir_bit; | |
3731 | p1++; | |
3732 | if (p1 >= leftmargin && p1 < endp) | |
3733 | *p1 = (MAKE_GLYPH (f, (7 & (c >> 3)) + '0', current_face) | |
3734 | | rev_dir_bit); | |
3735 | p1++; | |
3736 | if (p1 >= leftmargin && p1 < endp) | |
3737 | *p1 = MAKE_GLYPH (f, (7 & c) + '0', current_face) | rev_dir_bit; | |
3738 | p1++; | |
3739 | } while (eat_following_binary_data | |
3740 | && (pos_byte + len) < limit_byte | |
3741 | && ! CHAR_HEAD_P (*p) | |
3742 | && ((c = *p++), len++)); | |
a2889657 | 3743 | } |
1c9241f5 KH |
3744 | else |
3745 | { | |
3746 | /* C is a multibyte character. */ | |
3747 | int charset = CHAR_CHARSET (c); | |
3748 | int columns = (charset == CHARSET_COMPOSITION | |
3749 | ? cmpchar_table[COMPOSITE_CHAR_ID (c)]->width | |
3750 | : CHARSET_WIDTH (charset)); | |
3751 | GLYPH g = MAKE_GLYPH (f, c, current_face) | rev_dir_bit; | |
3752 | ||
3753 | while (columns--) | |
3754 | { | |
3755 | if (p1 >= leftmargin && p1 < endp) | |
3756 | *p1 = g, g |= GLYPH_MASK_PADDING; | |
3757 | p1++; | |
3758 | } | |
0d09d1e6 KH |
3759 | |
3760 | p1_wide_column_end = p1; | |
3761 | /* Check if binary data follows it. */ | |
3762 | if (pos_byte + len < limit_byte | |
3763 | && ! CHAR_HEAD_P (*p)) | |
3764 | { | |
3765 | eat_following_binary_data = 1; | |
3766 | c = *p++; | |
3767 | len++; | |
3768 | goto label_display_binary_data; | |
3769 | } | |
1c9241f5 | 3770 | } |
31b24551 | 3771 | |
ca26e1c8 | 3772 | prevpos = pos; |
12adba34 RS |
3773 | prevpos_byte = pos_byte; |
3774 | pos++; | |
3775 | pos_byte += len; | |
545e04f6 KH |
3776 | |
3777 | /* Update charstarts for the character just output. */ | |
3778 | ||
3779 | /* Do nothing here for a char that's entirely off the left edge. */ | |
3780 | if (p1 >= leftmargin) | |
3781 | { | |
3782 | /* Store the char's position into charstarts | |
3783 | for the first glyph occupied by this char. | |
3784 | Store -1 for the rest of the glyphs it occupies. */ | |
3785 | if (p1 != p1prev) | |
3786 | { | |
3787 | int *p2x = &charstart[(p1prev < leftmargin | |
3788 | ? leftmargin : p1prev) | |
3789 | - p1start]; | |
3790 | int *p2 = &charstart[(p1 < endp ? p1 : endp) - p1start]; | |
3791 | ||
3792 | if (p2x < p2) | |
3793 | *p2x++ = prevpos; | |
3794 | while (p2x < p2) | |
3795 | *p2x++ = -1; | |
3796 | } | |
3797 | } | |
a2889657 JB |
3798 | } |
3799 | ||
3800 | val.hpos = - XINT (w->hscroll); | |
3801 | if (val.hpos) | |
3802 | val.hpos++; | |
3803 | ||
3804 | val.vpos = 1; | |
3805 | ||
3806 | lastpos = pos; | |
12adba34 | 3807 | lastpos_byte = pos_byte; |
a2889657 | 3808 | |
efc63ef0 RS |
3809 | /* Store 0 in this charstart line for the positions where |
3810 | there is no character. But do leave what was recorded | |
3811 | for the character that ended the line. */ | |
85bcef6c RS |
3812 | /* Add 1 in the endtest to compensate for the fact that ENDP was |
3813 | made from WIDTH, which is 1 less than the window's actual | |
3814 | internal width. */ | |
a007eef6 RS |
3815 | i = p1 - p1start + 1; |
3816 | if (p1 < leftmargin) | |
3817 | i += leftmargin - p1; | |
3818 | for (; i < endp - p1start + 1; i++) | |
efc63ef0 RS |
3819 | charstart[i] = 0; |
3820 | ||
a2889657 JB |
3821 | /* Handle continuation in middle of a character */ |
3822 | /* by backing up over it */ | |
3823 | if (p1 > endp) | |
3824 | { | |
5fcbb24d JB |
3825 | /* Don't back up if we never actually displayed any text. |
3826 | This occurs when the minibuffer prompt takes up the whole line. */ | |
3827 | if (p1prev) | |
3828 | { | |
1c9241f5 KH |
3829 | /* Start the next line with that same character whose |
3830 | character code is C and the length of multi-byte form is | |
3831 | LEN. */ | |
3832 | pos = prevpos; | |
12adba34 | 3833 | pos_byte = prevpos_byte; |
1c9241f5 | 3834 | |
0d09d1e6 KH |
3835 | if (p1_wide_column_end < endp) |
3836 | /* As ENDP is not in the middle of wide-column character, | |
3837 | we can break the line at ENDP and start from the middle | |
3838 | column in the next line. So, adjust VAL.HPOS to skip | |
3839 | the columns output on this line. */ | |
1c9241f5 KH |
3840 | val.hpos += p1prev - endp; |
3841 | else | |
3842 | { | |
0d09d1e6 KH |
3843 | /* We displayed a wide-column character at around ENDP. |
3844 | Since we can't broke it in the middle, the whole | |
3845 | character should be driven into the next line. */ | |
1c9241f5 KH |
3846 | /* As the result, the actual columns occupied by the |
3847 | text on this line is less than WIDTH. VAL.TAB_OFFSET | |
3848 | must be adjusted. */ | |
3849 | taboffset = taboffset + (p1prev - endp); | |
3850 | /* Let's fill unused columns with TRUNCATOR or CONTINUER. */ | |
3851 | { | |
3852 | GLYPH g = fix_glyph (f, truncate ? truncator : continuer, 0); | |
3853 | while (p1prev < endp) | |
3854 | *p1prev++ = g; | |
3855 | } | |
3856 | /* If POINT is at POS, cursor should not on this line. */ | |
3857 | lastpos = pos; | |
12adba34 | 3858 | lastpos_byte = pos_byte; |
1c9241f5 KH |
3859 | if (PT == pos) |
3860 | cursor_vpos = -1; | |
3861 | } | |
5fcbb24d JB |
3862 | } |
3863 | ||
a2889657 JB |
3864 | /* Keep in this line everything up to the continuation column. */ |
3865 | p1 = endp; | |
3866 | } | |
3867 | ||
3868 | /* Finish deciding which character to start the next line on, | |
3869 | and what hpos to start it at. | |
3870 | Also set `lastpos' to the last position which counts as "on this line" | |
3871 | for cursor-positioning. */ | |
3872 | ||
3873 | if (pos < ZV) | |
3874 | { | |
12adba34 | 3875 | if (FETCH_BYTE (pos_byte) == '\n') |
dd5f6267 | 3876 | { |
12adba34 RS |
3877 | int opoint = PT, opoint_byte = PT_BYTE; |
3878 | ||
dd5f6267 | 3879 | /* If stopped due to a newline, start next line after it */ |
12adba34 RS |
3880 | SET_PT_BOTH (pos + 1, pos_byte + 1); |
3881 | ||
1c9241f5 | 3882 | val.tab_offset = 0; |
dd5f6267 KH |
3883 | /* Check again for hidden lines, in case the newline occurred exactly |
3884 | at the right margin. */ | |
12adba34 RS |
3885 | while (PT < ZV && selective > 0 |
3886 | && indented_beyond_p (PT, PT_BYTE, selective)) | |
3887 | scan_newline (PT, PT_BYTE, ZV, ZV_BYTE, 1, 1); | |
3888 | ||
3889 | pos = PT, pos_byte = PT_BYTE; | |
3890 | SET_PT_BOTH (opoint, opoint_byte); | |
dd5f6267 | 3891 | } |
a2889657 JB |
3892 | else |
3893 | /* Stopped due to right margin of window */ | |
3894 | { | |
3895 | if (truncate) | |
3896 | { | |
12adba34 RS |
3897 | int opoint = PT, opoint_byte = PT_BYTE; |
3898 | ||
3899 | SET_PT_BOTH (pos, pos_byte); | |
278feba9 | 3900 | *p1++ = fix_glyph (f, truncator, 0); |
a2889657 JB |
3901 | /* Truncating => start next line after next newline, |
3902 | and point is on this line if it is before the newline, | |
3903 | and skip none of first char of next line */ | |
dd5f6267 | 3904 | do |
12adba34 RS |
3905 | scan_newline (PT, PT_BYTE, ZV, ZV_BYTE, 1, 1); |
3906 | while (PT < ZV && selective > 0 | |
3907 | && indented_beyond_p (PT, PT_BYTE, selective)); | |
3908 | pos = PT, pos_byte = PT_BYTE; | |
a2889657 | 3909 | val.hpos = XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0; |
12adba34 | 3910 | SET_PT_BOTH (opoint, opoint_byte); |
a2889657 | 3911 | |
12adba34 RS |
3912 | lastpos = pos - (FETCH_BYTE (pos_byte - 1) == '\n'); |
3913 | lastpos_byte = CHAR_TO_BYTE (lastpos); | |
1c9241f5 | 3914 | val.tab_offset = 0; |
a2889657 JB |
3915 | } |
3916 | else | |
3917 | { | |
278feba9 | 3918 | *p1++ = fix_glyph (f, continuer, 0); |
a2889657 | 3919 | val.vpos = 0; |
93fdf93b | 3920 | DEC_BOTH (lastpos, lastpos_byte); |
1c9241f5 | 3921 | val.tab_offset = taboffset + width; |
a2889657 JB |
3922 | } |
3923 | } | |
3924 | } | |
1c9241f5 KH |
3925 | else |
3926 | val.tab_offset = 0; | |
a2889657 JB |
3927 | |
3928 | /* If point is at eol or in invisible text at eol, | |
44fa5b1e | 3929 | record its frame location now. */ |
a2889657 | 3930 | |
ae3b1442 | 3931 | if (start <= PT && PT <= lastpos && cursor_vpos < 0) |
a2889657 JB |
3932 | { |
3933 | cursor_vpos = vpos; | |
d2f84654 | 3934 | cursor_hpos = p1 - leftmargin; |
a2889657 JB |
3935 | } |
3936 | ||
3937 | if (cursor_vpos == vpos) | |
3938 | { | |
3939 | if (cursor_hpos < 0) cursor_hpos = 0; | |
3940 | if (cursor_hpos > width) cursor_hpos = width; | |
73f194f1 | 3941 | cursor_hpos += WINDOW_LEFT_MARGIN (w); |
44fa5b1e | 3942 | if (w == XWINDOW (FRAME_SELECTED_WINDOW (f))) |
a2889657 | 3943 | { |
b5bbc9a5 KH |
3944 | if (!(cursor_in_echo_area && FRAME_HAS_MINIBUF_P (f) |
3945 | && EQ (FRAME_MINIBUF_WINDOW (f), minibuf_window))) | |
3946 | { | |
3947 | FRAME_CURSOR_Y (f) = cursor_vpos; | |
3948 | FRAME_CURSOR_X (f) = cursor_hpos; | |
3949 | } | |
a2889657 JB |
3950 | |
3951 | if (w == XWINDOW (selected_window)) | |
3952 | { | |
3953 | /* Line is not continued and did not start | |
3954 | in middle of character */ | |
73f194f1 | 3955 | if ((hpos - WINDOW_LEFT_MARGIN (w) |
a2889657 JB |
3956 | == (XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0)) |
3957 | && val.vpos) | |
3958 | { | |
3959 | this_line_bufpos = start; | |
3960 | this_line_buffer = current_buffer; | |
3961 | this_line_vpos = cursor_vpos; | |
89819bdd | 3962 | this_line_start_hpos = hpos - WINDOW_LEFT_MARGIN (w); |
a2889657 JB |
3963 | this_line_endpos = Z - lastpos; |
3964 | } | |
3965 | else | |
3966 | this_line_bufpos = 0; | |
3967 | } | |
3968 | } | |
3969 | } | |
3970 | ||
3971 | /* If hscroll and line not empty, insert truncation-at-left marker */ | |
3972 | if (hscroll && lastpos != start) | |
3973 | { | |
1c9241f5 KH |
3974 | GLYPH g = fix_glyph (f, truncator, 0); |
3975 | *leftmargin = g; | |
d2f84654 RS |
3976 | if (p1 <= leftmargin) |
3977 | p1 = leftmargin + 1; | |
1c9241f5 KH |
3978 | else /* MULE: it may be a wide-column character */ |
3979 | { | |
3980 | p1prev = leftmargin + 1; | |
3981 | while (p1prev < p1 && *p1prev & GLYPH_MASK_PADDING) | |
3982 | *p1prev++ = g; | |
3983 | } | |
a2889657 JB |
3984 | } |
3985 | ||
73f194f1 | 3986 | if (!WINDOW_RIGHTMOST_P (w)) |
a2889657 JB |
3987 | { |
3988 | endp++; | |
d2f84654 | 3989 | if (p1 < leftmargin) p1 = leftmargin; |
a2889657 | 3990 | while (p1 < endp) *p1++ = SPACEGLYPH; |
b1d1124b | 3991 | |
88f22aff JB |
3992 | /* Don't draw vertical bars if we're using scroll bars. They're |
3993 | covered up by the scroll bars, and it's distracting to see | |
3994 | them when the scroll bar windows are flickering around to be | |
b1d1124b | 3995 | reconfigured. */ |
73f194f1 | 3996 | if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_RIGHT (f)) |
75d13c64 KH |
3997 | { |
3998 | int i; | |
3999 | for (i = 0; i < FRAME_SCROLL_BAR_COLS (f); i++) | |
4000 | *p1++ = SPACEGLYPH; | |
4001 | } | |
73f194f1 | 4002 | else if (!FRAME_HAS_VERTICAL_SCROLL_BARS (f)) |
75d13c64 | 4003 | *p1++ = (dp && INTEGERP (DISP_BORDER_GLYPH (dp)) |
8bb6ca14 | 4004 | ? XINT (DISP_BORDER_GLYPH (dp)) |
75d13c64 | 4005 | : '|'); |
a2889657 JB |
4006 | } |
4007 | desired_glyphs->used[vpos] = max (desired_glyphs->used[vpos], | |
4008 | p1 - desired_glyphs->glyphs[vpos]); | |
4009 | desired_glyphs->glyphs[vpos][desired_glyphs->used[vpos]] = 0; | |
4010 | ||
4011 | /* If the start of this line is the overlay arrow-position, | |
4012 | then put the arrow string into the display-line. */ | |
4013 | ||
e24c997d | 4014 | if (MARKERP (Voverlay_arrow_position) |
a2889657 JB |
4015 | && current_buffer == XMARKER (Voverlay_arrow_position)->buffer |
4016 | && start == marker_position (Voverlay_arrow_position) | |
e24c997d | 4017 | && STRINGP (Voverlay_arrow_string) |
a2889657 JB |
4018 | && ! overlay_arrow_seen) |
4019 | { | |
0a9dc68b | 4020 | int i, i_byte; |
a2889657 | 4021 | int len = XSTRING (Voverlay_arrow_string)->size; |
142be3dd | 4022 | int arrow_end; |
a2889657 | 4023 | |
b1d1124b JB |
4024 | if (len > width) |
4025 | len = width; | |
87485d6f | 4026 | #ifdef HAVE_FACES |
c4628384 RS |
4027 | if (!NULL_INTERVAL_P (XSTRING (Voverlay_arrow_string)->intervals)) |
4028 | { | |
4029 | /* If the arrow string has text props, obey them when displaying. */ | |
0a9dc68b | 4030 | for (i = 0, i_byte = 0; i < len; ) |
c4628384 | 4031 | { |
0a9dc68b | 4032 | int c; |
c4628384 RS |
4033 | Lisp_Object face, ilisp; |
4034 | int newface; | |
4035 | ||
0a9dc68b RS |
4036 | if (STRING_MULTIBYTE (Voverlay_arrow_string)) |
4037 | FETCH_STRING_CHAR_ADVANCE (c, Voverlay_arrow_string, i, i_byte); | |
4038 | else | |
4039 | c = XSTRING (Voverlay_arrow_string)->data[i++]; | |
4040 | ||
c2213350 | 4041 | XSETFASTINT (ilisp, i); |
c4628384 RS |
4042 | face = Fget_text_property (ilisp, Qface, Voverlay_arrow_string); |
4043 | newface = compute_glyph_face_1 (f, face, 0); | |
4044 | leftmargin[i] = FAST_MAKE_GLYPH (c, newface); | |
4045 | } | |
4046 | } | |
4047 | else | |
87485d6f | 4048 | #endif /* HAVE_FACES */ |
c4628384 RS |
4049 | { |
4050 | for (i = 0; i < len; i++) | |
4051 | leftmargin[i] = p[i]; | |
4052 | } | |
142be3dd JB |
4053 | |
4054 | /* Bug in SunOS 4.1.1 compiler requires this intermediate variable. */ | |
d2f84654 | 4055 | arrow_end = (leftmargin - desired_glyphs->glyphs[vpos]) + len; |
142be3dd JB |
4056 | if (desired_glyphs->used[vpos] < arrow_end) |
4057 | desired_glyphs->used[vpos] = arrow_end; | |
a2889657 JB |
4058 | |
4059 | overlay_arrow_seen = 1; | |
4060 | } | |
4061 | ||
4062 | val.bufpos = pos; | |
12adba34 | 4063 | val.bytepos = pos_byte; |
0f9c0ff0 | 4064 | val.ovstring_chars_done = ovstr_done; |
a2889657 JB |
4065 | val_display_text_line = val; |
4066 | return &val_display_text_line; | |
4067 | } | |
4068 | \f | |
7ce2c095 RS |
4069 | /* Redisplay the menu bar in the frame for window W. */ |
4070 | ||
4071 | static void | |
4072 | display_menu_bar (w) | |
4073 | struct window *w; | |
4074 | { | |
4075 | Lisp_Object items, tail; | |
4076 | register int vpos = 0; | |
4077 | register FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); | |
eeb4f710 | 4078 | int maxendcol = FRAME_WIDTH (f); |
7ce2c095 | 4079 | int hpos = 0; |
8351baf2 | 4080 | int i; |
7ce2c095 | 4081 | |
dc937613 | 4082 | #ifdef HAVE_NTGUI |
d129c4c2 KH |
4083 | if (!NILP (Vwindow_system)) |
4084 | return; | |
dc937613 RS |
4085 | #endif |
4086 | ||
4087 | #ifdef USE_X_TOOLKIT | |
d3413a53 | 4088 | if (FRAME_X_P (f)) |
7ce2c095 | 4089 | return; |
dc937613 | 4090 | #endif /* USE_X_TOOLKIT */ |
7ce2c095 RS |
4091 | |
4092 | get_display_line (f, vpos, 0); | |
4093 | ||
8351baf2 | 4094 | items = FRAME_MENU_BAR_ITEMS (f); |
469937ac | 4095 | for (i = 0; i < XVECTOR (items)->size; i += 4) |
7ce2c095 | 4096 | { |
8351baf2 RS |
4097 | Lisp_Object pos, string; |
4098 | string = XVECTOR (items)->contents[i + 1]; | |
4099 | if (NILP (string)) | |
4100 | break; | |
2d66ad19 | 4101 | |
469937ac | 4102 | XSETFASTINT (XVECTOR (items)->contents[i + 3], hpos); |
7ce2c095 RS |
4103 | |
4104 | if (hpos < maxendcol) | |
11c52c4f | 4105 | hpos = display_string (w, vpos, |
7ce2c095 | 4106 | XSTRING (string)->data, |
fc932ac6 | 4107 | STRING_BYTES (XSTRING (string)), |
0a9dc68b RS |
4108 | hpos, 0, 0, hpos, maxendcol, |
4109 | STRING_MULTIBYTE (string)); | |
6b1bbc46 | 4110 | /* Put a space between items. */ |
2d66ad19 RS |
4111 | if (hpos < maxendcol) |
4112 | { | |
6b1bbc46 | 4113 | int hpos1 = hpos + 1; |
278feba9 | 4114 | hpos = display_string (w, vpos, "", 0, hpos, 0, 0, |
a3788d53 | 4115 | min (hpos1, maxendcol), maxendcol, 0); |
2d66ad19 | 4116 | } |
7ce2c095 RS |
4117 | } |
4118 | ||
4119 | FRAME_DESIRED_GLYPHS (f)->bufp[vpos] = 0; | |
4120 | FRAME_DESIRED_GLYPHS (f)->highlight[vpos] = mode_line_inverse_video; | |
2d66ad19 RS |
4121 | |
4122 | /* Fill out the line with spaces. */ | |
4123 | if (maxendcol > hpos) | |
a3788d53 | 4124 | hpos = display_string (w, vpos, "", 0, hpos, 0, 0, maxendcol, maxendcol, 0); |
db6f348c JB |
4125 | |
4126 | /* Clear the rest of the lines allocated to the menu bar. */ | |
4127 | vpos++; | |
4128 | while (vpos < FRAME_MENU_BAR_LINES (f)) | |
4129 | get_display_line (f, vpos++, 0); | |
7ce2c095 RS |
4130 | } |
4131 | \f | |
a2889657 JB |
4132 | /* Display the mode line for window w */ |
4133 | ||
4134 | static void | |
4135 | display_mode_line (w) | |
4136 | struct window *w; | |
4137 | { | |
4138 | register int vpos = XFASTINT (w->height) + XFASTINT (w->top) - 1; | |
73f194f1 RS |
4139 | register int left = WINDOW_LEFT_MARGIN (w); |
4140 | register int right = WINDOW_RIGHT_MARGIN (w); | |
44fa5b1e | 4141 | register FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
a2889657 | 4142 | |
aa6d10fa | 4143 | line_number_displayed = 0; |
155ef550 | 4144 | w->column_number_displayed = Qnil; |
aa6d10fa | 4145 | |
44fa5b1e | 4146 | get_display_line (f, vpos, left); |
03b294dc RS |
4147 | |
4148 | /* Temporarily make frame F's kboard the current kboard | |
4149 | so that kboard-local variables in the mode_line_format | |
4150 | will get the right values. */ | |
4151 | push_frame_kboard (f); | |
4152 | ||
4153 | display_mode_element (w, vpos, left, 0, right, right, | |
4154 | current_buffer->mode_line_format); | |
4155 | ||
4156 | pop_frame_kboard (); | |
4157 | ||
44fa5b1e | 4158 | FRAME_DESIRED_GLYPHS (f)->bufp[vpos] = 0; |
a2889657 | 4159 | |
73f194f1 RS |
4160 | /* Put the mode line in inverse video. |
4161 | Use faces if possible, since that lets us handle | |
4162 | partial-width windows and avoid inverting the scroll bar columns. */ | |
87485d6f | 4163 | #ifdef HAVE_FACES |
73f194f1 | 4164 | if (! FRAME_TERMCAP_P (f) && mode_line_inverse_video) |
d7eb09a0 RS |
4165 | { |
4166 | /* For a partial width window, explicitly set face of each glyph. */ | |
4167 | int i; | |
1c9241f5 | 4168 | unsigned int padding; |
d7eb09a0 RS |
4169 | GLYPH *ptr = FRAME_DESIRED_GLYPHS (f)->glyphs[vpos]; |
4170 | for (i = left; i < right; ++i) | |
1c9241f5 KH |
4171 | { |
4172 | padding = ptr[i] & GLYPH_MASK_PADDING; | |
4173 | ptr[i] = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (ptr[i]), 1) | padding; | |
4174 | } | |
d7eb09a0 | 4175 | } |
010a899e | 4176 | else |
4cdc65eb | 4177 | #endif |
73f194f1 RS |
4178 | |
4179 | /* Make the mode line inverse video if the entire line | |
4180 | is made of mode lines. | |
4181 | I.e. if this window is full width, | |
4182 | or if it is the child of a full width window | |
4183 | (which implies that that window is split side-by-side | |
4184 | and the rest of this line is mode lines of the sibling windows). */ | |
010a899e KH |
4185 | if (WINDOW_FULL_WIDTH_P (w) |
4186 | || WINDOW_FULL_WIDTH_P (XWINDOW (w->parent))) | |
73f194f1 | 4187 | FRAME_DESIRED_GLYPHS (f)->highlight[vpos] = mode_line_inverse_video; |
a2889657 JB |
4188 | } |
4189 | ||
4190 | /* Contribute ELT to the mode line for window W. | |
4191 | How it translates into text depends on its data type. | |
4192 | ||
4193 | VPOS is the position of the mode line being displayed. | |
4194 | ||
44fa5b1e | 4195 | HPOS is the position (absolute on frame) where this element's text |
a2889657 JB |
4196 | should start. The output is truncated automatically at the right |
4197 | edge of window W. | |
4198 | ||
4199 | DEPTH is the depth in recursion. It is used to prevent | |
4200 | infinite recursion here. | |
4201 | ||
4202 | MINENDCOL is the hpos before which the element may not end. | |
4203 | The element is padded at the right with spaces if nec | |
4204 | to reach this column. | |
4205 | ||
4206 | MAXENDCOL is the hpos past which this element may not extend. | |
4207 | If MINENDCOL is > MAXENDCOL, MINENDCOL takes priority. | |
4208 | (This is necessary to make nested padding and truncation work.) | |
4209 | ||
4210 | Returns the hpos of the end of the text generated by ELT. | |
4211 | The next element will receive that value as its HPOS arg, | |
4212 | so as to concatenate the elements. */ | |
4213 | ||
4214 | static int | |
4215 | display_mode_element (w, vpos, hpos, depth, minendcol, maxendcol, elt) | |
4216 | struct window *w; | |
4217 | register int vpos, hpos; | |
4218 | int depth; | |
4219 | int minendcol; | |
4220 | register int maxendcol; | |
4221 | register Lisp_Object elt; | |
4222 | { | |
4223 | tail_recurse: | |
4224 | if (depth > 10) | |
4225 | goto invalid; | |
4226 | ||
4227 | depth++; | |
4228 | ||
0220c518 | 4229 | switch (SWITCH_ENUM_CAST (XTYPE (elt))) |
a2889657 JB |
4230 | { |
4231 | case Lisp_String: | |
4232 | { | |
4233 | /* A string: output it and check for %-constructs within it. */ | |
4234 | register unsigned char c; | |
4235 | register unsigned char *this = XSTRING (elt)->data; | |
4236 | ||
4237 | while (hpos < maxendcol && *this) | |
4238 | { | |
4239 | unsigned char *last = this; | |
4240 | while ((c = *this++) != '\0' && c != '%') | |
4241 | ; | |
4242 | if (this - 1 != last) | |
4243 | { | |
4244 | register int lim = --this - last + hpos; | |
d39b6696 KH |
4245 | if (frame_title_ptr) |
4246 | hpos = store_frame_title (last, hpos, min (lim, maxendcol)); | |
4247 | else | |
4248 | hpos = display_string (w, vpos, last, -1, hpos, 0, 1, | |
0a9dc68b RS |
4249 | hpos, min (lim, maxendcol), |
4250 | STRING_MULTIBYTE (elt)); | |
a2889657 JB |
4251 | } |
4252 | else /* c == '%' */ | |
4253 | { | |
766525bc | 4254 | register int minendcol; |
a2889657 JB |
4255 | register int spec_width = 0; |
4256 | ||
4257 | /* We can't allow -ve args due to the "%-" construct */ | |
4258 | /* Argument specifies minwidth but not maxwidth | |
4259 | (maxwidth can be specified by | |
4260 | (<negative-number> . <stuff>) mode-line elements) */ | |
4261 | ||
4262 | while ((c = *this++) >= '0' && c <= '9') | |
4263 | { | |
4264 | spec_width = spec_width * 10 + (c - '0'); | |
4265 | } | |
4266 | ||
766525bc RS |
4267 | minendcol = hpos + spec_width; |
4268 | if (minendcol > maxendcol) | |
4269 | { | |
4270 | spec_width = maxendcol - hpos; | |
4271 | minendcol = maxendcol; | |
4272 | } | |
a2889657 JB |
4273 | |
4274 | if (c == 'M') | |
4275 | hpos = display_mode_element (w, vpos, hpos, depth, | |
4276 | spec_width, maxendcol, | |
4277 | Vglobal_mode_string); | |
4278 | else if (c != 0) | |
d39b6696 | 4279 | { |
766525bc RS |
4280 | char *spec = decode_mode_spec (w, c, spec_width, |
4281 | maxendcol - hpos); | |
d39b6696 | 4282 | if (frame_title_ptr) |
766525bc | 4283 | hpos = store_frame_title (spec, minendcol, maxendcol); |
d39b6696 KH |
4284 | else |
4285 | hpos = display_string (w, vpos, spec, -1, | |
4286 | hpos, 0, 1, | |
a3788d53 | 4287 | minendcol, maxendcol, -1); |
d39b6696 | 4288 | } |
a2889657 JB |
4289 | } |
4290 | } | |
4291 | } | |
4292 | break; | |
4293 | ||
4294 | case Lisp_Symbol: | |
4295 | /* A symbol: process the value of the symbol recursively | |
4296 | as if it appeared here directly. Avoid error if symbol void. | |
4297 | Special case: if value of symbol is a string, output the string | |
4298 | literally. */ | |
4299 | { | |
4300 | register Lisp_Object tem; | |
4301 | tem = Fboundp (elt); | |
265a9e55 | 4302 | if (!NILP (tem)) |
a2889657 JB |
4303 | { |
4304 | tem = Fsymbol_value (elt); | |
4305 | /* If value is a string, output that string literally: | |
4306 | don't check for % within it. */ | |
e24c997d | 4307 | if (STRINGP (tem)) |
d39b6696 KH |
4308 | { |
4309 | if (frame_title_ptr) | |
4310 | hpos = store_frame_title (XSTRING (tem)->data, | |
4311 | minendcol, maxendcol); | |
4312 | else | |
4313 | hpos = display_string (w, vpos, XSTRING (tem)->data, | |
fc932ac6 | 4314 | STRING_BYTES (XSTRING (tem)), |
0a9dc68b RS |
4315 | hpos, 0, 1, minendcol, maxendcol, |
4316 | STRING_MULTIBYTE (tem)); | |
d39b6696 | 4317 | } |
a2889657 JB |
4318 | /* Give up right away for nil or t. */ |
4319 | else if (!EQ (tem, elt)) | |
4320 | { elt = tem; goto tail_recurse; } | |
4321 | } | |
4322 | } | |
4323 | break; | |
4324 | ||
4325 | case Lisp_Cons: | |
4326 | { | |
4327 | register Lisp_Object car, tem; | |
4328 | ||
4329 | /* A cons cell: three distinct cases. | |
4330 | If first element is a string or a cons, process all the elements | |
4331 | and effectively concatenate them. | |
4332 | If first element is a negative number, truncate displaying cdr to | |
4333 | at most that many characters. If positive, pad (with spaces) | |
4334 | to at least that many characters. | |
4335 | If first element is a symbol, process the cadr or caddr recursively | |
4336 | according to whether the symbol's value is non-nil or nil. */ | |
4337 | car = XCONS (elt)->car; | |
e24c997d | 4338 | if (SYMBOLP (car)) |
a2889657 JB |
4339 | { |
4340 | tem = Fboundp (car); | |
4341 | elt = XCONS (elt)->cdr; | |
e24c997d | 4342 | if (!CONSP (elt)) |
a2889657 JB |
4343 | goto invalid; |
4344 | /* elt is now the cdr, and we know it is a cons cell. | |
4345 | Use its car if CAR has a non-nil value. */ | |
265a9e55 | 4346 | if (!NILP (tem)) |
a2889657 JB |
4347 | { |
4348 | tem = Fsymbol_value (car); | |
265a9e55 | 4349 | if (!NILP (tem)) |
a2889657 JB |
4350 | { elt = XCONS (elt)->car; goto tail_recurse; } |
4351 | } | |
4352 | /* Symbol's value is nil (or symbol is unbound) | |
4353 | Get the cddr of the original list | |
4354 | and if possible find the caddr and use that. */ | |
4355 | elt = XCONS (elt)->cdr; | |
265a9e55 | 4356 | if (NILP (elt)) |
a2889657 | 4357 | break; |
e24c997d | 4358 | else if (!CONSP (elt)) |
a2889657 JB |
4359 | goto invalid; |
4360 | elt = XCONS (elt)->car; | |
4361 | goto tail_recurse; | |
4362 | } | |
e24c997d | 4363 | else if (INTEGERP (car)) |
a2889657 JB |
4364 | { |
4365 | register int lim = XINT (car); | |
4366 | elt = XCONS (elt)->cdr; | |
4367 | if (lim < 0) | |
4368 | /* Negative int means reduce maximum width. | |
4369 | DO NOT change MINENDCOL here! | |
4370 | (20 -10 . foo) should truncate foo to 10 col | |
4371 | and then pad to 20. */ | |
4372 | maxendcol = min (maxendcol, hpos - lim); | |
4373 | else if (lim > 0) | |
4374 | { | |
4375 | /* Padding specified. Don't let it be more than | |
4376 | current maximum. */ | |
4377 | lim += hpos; | |
4378 | if (lim > maxendcol) | |
4379 | lim = maxendcol; | |
4380 | /* If that's more padding than already wanted, queue it. | |
4381 | But don't reduce padding already specified even if | |
4382 | that is beyond the current truncation point. */ | |
4383 | if (lim > minendcol) | |
4384 | minendcol = lim; | |
4385 | } | |
4386 | goto tail_recurse; | |
4387 | } | |
e24c997d | 4388 | else if (STRINGP (car) || CONSP (car)) |
a2889657 JB |
4389 | { |
4390 | register int limit = 50; | |
4391 | /* LIMIT is to protect against circular lists. */ | |
e24c997d | 4392 | while (CONSP (elt) && --limit > 0 |
a2889657 JB |
4393 | && hpos < maxendcol) |
4394 | { | |
4395 | hpos = display_mode_element (w, vpos, hpos, depth, | |
4396 | hpos, maxendcol, | |
4397 | XCONS (elt)->car); | |
4398 | elt = XCONS (elt)->cdr; | |
4399 | } | |
4400 | } | |
4401 | } | |
4402 | break; | |
4403 | ||
4404 | default: | |
4405 | invalid: | |
d39b6696 KH |
4406 | if (frame_title_ptr) |
4407 | hpos = store_frame_title ("*invalid*", minendcol, maxendcol); | |
4408 | else | |
4409 | hpos = display_string (w, vpos, "*invalid*", -1, hpos, 0, 1, | |
a3788d53 | 4410 | minendcol, maxendcol, 0); |
d39b6696 | 4411 | return hpos; |
a2889657 JB |
4412 | } |
4413 | ||
a2889657 | 4414 | if (minendcol > hpos) |
d39b6696 KH |
4415 | if (frame_title_ptr) |
4416 | hpos = store_frame_title ("", minendcol, maxendcol); | |
4417 | else | |
a3788d53 RS |
4418 | hpos = display_string (w, vpos, "", 0, hpos, |
4419 | 0, 1, minendcol, maxendcol, 0); | |
a2889657 JB |
4420 | return hpos; |
4421 | } | |
4422 | \f | |
766525bc RS |
4423 | /* Write a null-terminated, right justified decimal representation of |
4424 | the positive integer D to BUF using a minimal field width WIDTH. */ | |
4425 | ||
4426 | static void | |
4427 | pint2str (buf, width, d) | |
4428 | register char *buf; | |
4429 | register int width; | |
4430 | register int d; | |
4431 | { | |
4432 | register char *p = buf; | |
4433 | ||
4434 | if (d <= 0) | |
4435 | *p++ = '0'; | |
4436 | else | |
4437 | while (d > 0) | |
4438 | { | |
4439 | *p++ = d % 10 + '0'; | |
4440 | d /= 10; | |
4441 | } | |
4442 | for (width -= (int) (p - buf); width > 0; --width) *p++ = ' '; | |
4443 | *p-- = '\0'; | |
4444 | while (p > buf) | |
4445 | { | |
4446 | d = *buf; | |
4447 | *buf++ = *p; | |
4448 | *p-- = d; | |
4449 | } | |
4450 | } | |
4451 | ||
1c9241f5 KH |
4452 | /* Set a mnemonic character for CODING_SYSTEM (Lisp symbol) in BUF. |
4453 | If EOL_FLAG is 1, set also a mnemonic character for end-of-line | |
4454 | type of CODING_SYSTEM. Return updated pointer into BUF. */ | |
4455 | ||
4456 | static char * | |
4457 | decode_mode_spec_coding (coding_system, buf, eol_flag) | |
4458 | Lisp_Object coding_system; | |
4459 | register char *buf; | |
4460 | int eol_flag; | |
4461 | { | |
1e1078d6 | 4462 | Lisp_Object val; |
916848d8 | 4463 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
1e1078d6 RS |
4464 | |
4465 | val = coding_system; | |
1c9241f5 KH |
4466 | |
4467 | if (NILP (val)) /* Not yet decided. */ | |
4468 | { | |
916848d8 RS |
4469 | if (multibyte) |
4470 | *buf++ = '-'; | |
21e989e3 RS |
4471 | if (eol_flag) |
4472 | *buf++ = eol_mnemonic_undecided; | |
1e1078d6 | 4473 | /* Don't mention EOL conversion if it isn't decided. */ |
1c9241f5 KH |
4474 | } |
4475 | else | |
4476 | { | |
1e1078d6 RS |
4477 | Lisp_Object eolvalue; |
4478 | ||
4479 | eolvalue = Fget (coding_system, Qeol_type); | |
4480 | ||
1c9241f5 | 4481 | while (!NILP (val) && SYMBOLP (val)) |
1e1078d6 RS |
4482 | { |
4483 | val = Fget (val, Qcoding_system); | |
4484 | if (NILP (eolvalue)) | |
b070c1d7 | 4485 | eolvalue = Fget (val, Qeol_type); |
1e1078d6 RS |
4486 | } |
4487 | ||
916848d8 RS |
4488 | if (multibyte) |
4489 | *buf++ = XFASTINT (XVECTOR (val)->contents[1]); | |
4490 | ||
1c9241f5 KH |
4491 | if (eol_flag) |
4492 | { | |
1e1078d6 RS |
4493 | /* The EOL conversion we are using. */ |
4494 | int eoltype; | |
4495 | /* The EOL conversion that is normal on this system. */ | |
4496 | ||
4497 | if (NILP (eolvalue)) /* Not yet decided. */ | |
4498 | eoltype = eol_mnemonic_undecided; | |
4499 | else if (VECTORP (eolvalue)) /* Not yet decided. */ | |
4500 | eoltype = eol_mnemonic_undecided; | |
4501 | else /* INTEGERP (eolvalue) -- 0:LF, 1:CRLF, 2:CR */ | |
4502 | eoltype = (XFASTINT (eolvalue) == 0 | |
4503 | ? eol_mnemonic_unix | |
4504 | : (XFASTINT (eolvalue) == 1 | |
4505 | ? eol_mnemonic_dos : eol_mnemonic_mac)); | |
4506 | ||
4507 | /* Mention the EOL conversion if it is not the usual one. */ | |
4508 | *buf++ = eoltype; | |
1c9241f5 KH |
4509 | } |
4510 | } | |
4511 | return buf; | |
4512 | } | |
4513 | ||
a2889657 | 4514 | /* Return a string for the output of a mode line %-spec for window W, |
766525bc RS |
4515 | generated by character C. SPEC_WIDTH is the field width when |
4516 | padding to the left (%c, %l). The value returned from this | |
4517 | function will later be truncated to width MAXWIDTH. */ | |
a2889657 | 4518 | |
11e82b76 JB |
4519 | static char lots_of_dashes[] = "--------------------------------------------------------------------------------------------------------------------------------------------"; |
4520 | ||
a2889657 | 4521 | static char * |
766525bc | 4522 | decode_mode_spec (w, c, spec_width, maxwidth) |
a2889657 JB |
4523 | struct window *w; |
4524 | register char c; | |
766525bc | 4525 | register int spec_width; |
a2889657 JB |
4526 | register int maxwidth; |
4527 | { | |
0b67772d | 4528 | Lisp_Object obj; |
44fa5b1e JB |
4529 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
4530 | char *decode_mode_spec_buf = (char *) FRAME_TEMP_GLYPHS (f)->total_contents; | |
d39b6696 | 4531 | struct buffer *b = XBUFFER (w->buffer); |
a2889657 | 4532 | |
0b67772d | 4533 | obj = Qnil; |
44fa5b1e JB |
4534 | if (maxwidth > FRAME_WIDTH (f)) |
4535 | maxwidth = FRAME_WIDTH (f); | |
a2889657 JB |
4536 | |
4537 | switch (c) | |
4538 | { | |
1af9f229 RS |
4539 | case '*': |
4540 | if (!NILP (b->read_only)) | |
4541 | return "%"; | |
4542 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
4543 | return "*"; | |
4544 | return "-"; | |
4545 | ||
4546 | case '+': | |
4547 | /* This differs from %* only for a modified read-only buffer. */ | |
4548 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
4549 | return "*"; | |
4550 | if (!NILP (b->read_only)) | |
4551 | return "%"; | |
4552 | return "-"; | |
4553 | ||
4554 | case '&': | |
4555 | /* This differs from %* in ignoring read-only-ness. */ | |
4556 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
4557 | return "*"; | |
4558 | return "-"; | |
4559 | ||
4560 | case '%': | |
4561 | return "%"; | |
4562 | ||
4563 | case '[': | |
4564 | { | |
4565 | int i; | |
4566 | char *p; | |
4567 | ||
4568 | if (command_loop_level > 5) | |
4569 | return "[[[... "; | |
4570 | p = decode_mode_spec_buf; | |
4571 | for (i = 0; i < command_loop_level; i++) | |
4572 | *p++ = '['; | |
4573 | *p = 0; | |
4574 | return decode_mode_spec_buf; | |
4575 | } | |
4576 | ||
4577 | case ']': | |
4578 | { | |
4579 | int i; | |
4580 | char *p; | |
4581 | ||
4582 | if (command_loop_level > 5) | |
4583 | return " ...]]]"; | |
4584 | p = decode_mode_spec_buf; | |
4585 | for (i = 0; i < command_loop_level; i++) | |
4586 | *p++ = ']'; | |
4587 | *p = 0; | |
4588 | return decode_mode_spec_buf; | |
4589 | } | |
4590 | ||
4591 | case '-': | |
4592 | { | |
4593 | register char *p; | |
4594 | register int i; | |
4595 | ||
4596 | if (maxwidth < sizeof (lots_of_dashes)) | |
4597 | return lots_of_dashes; | |
4598 | else | |
4599 | { | |
4600 | for (p = decode_mode_spec_buf, i = maxwidth; i > 0; i--) | |
4601 | *p++ = '-'; | |
4602 | *p = '\0'; | |
4603 | } | |
4604 | return decode_mode_spec_buf; | |
4605 | } | |
4606 | ||
a2889657 | 4607 | case 'b': |
d39b6696 | 4608 | obj = b->name; |
a2889657 | 4609 | #if 0 |
fc932ac6 | 4610 | if (maxwidth >= 3 && STRING_BYTES (XSTRING (obj)) > maxwidth) |
a2889657 JB |
4611 | { |
4612 | bcopy (XSTRING (obj)->data, decode_mode_spec_buf, maxwidth - 1); | |
4613 | decode_mode_spec_buf[maxwidth - 1] = '\\'; | |
4614 | decode_mode_spec_buf[maxwidth] = '\0'; | |
4615 | return decode_mode_spec_buf; | |
4616 | } | |
4617 | #endif | |
4618 | break; | |
4619 | ||
1af9f229 RS |
4620 | case 'c': |
4621 | { | |
4622 | int col = current_column (); | |
4623 | XSETFASTINT (w->column_number_displayed, col); | |
766525bc | 4624 | pint2str (decode_mode_spec_buf, spec_width, col); |
1af9f229 RS |
4625 | return decode_mode_spec_buf; |
4626 | } | |
4627 | ||
4628 | case 'F': | |
4629 | /* %F displays the frame name. */ | |
261bfd0e EZ |
4630 | /* Systems that can only display a single frame at a time should |
4631 | NOT replace the frame name with the (constant) frame title, | |
4632 | since then they won't be able to tell which frame is that. */ | |
4633 | if (FRAME_WINDOW_P (f) && !NILP (f->title)) | |
95184b48 | 4634 | return (char *) XSTRING (f->title)->data; |
fd8ff63d | 4635 | if (f->explicit_name || ! FRAME_WINDOW_P (f)) |
95184b48 | 4636 | return (char *) XSTRING (f->name)->data; |
9c6da96f | 4637 | return "Emacs"; |
1af9f229 | 4638 | |
a2889657 | 4639 | case 'f': |
d39b6696 | 4640 | obj = b->filename; |
a2889657 | 4641 | #if 0 |
265a9e55 | 4642 | if (NILP (obj)) |
a2889657 | 4643 | return "[none]"; |
fc932ac6 | 4644 | else if (STRINGP (obj) && STRING_BYTES (XSTRING (obj)) > maxwidth) |
a2889657 JB |
4645 | { |
4646 | bcopy ("...", decode_mode_spec_buf, 3); | |
fc932ac6 | 4647 | bcopy (XSTRING (obj)->data + STRING_BYTES (XSTRING (obj)) - maxwidth + 3, |
a2889657 JB |
4648 | decode_mode_spec_buf + 3, maxwidth - 3); |
4649 | return decode_mode_spec_buf; | |
4650 | } | |
4651 | #endif | |
4652 | break; | |
4653 | ||
aa6d10fa RS |
4654 | case 'l': |
4655 | { | |
12adba34 RS |
4656 | int startpos = XMARKER (w->start)->charpos; |
4657 | int startpos_byte = marker_byte_position (w->start); | |
4658 | int line, linepos, linepos_byte, topline; | |
aa6d10fa RS |
4659 | int nlines, junk; |
4660 | Lisp_Object tem; | |
4661 | int height = XFASTINT (w->height); | |
4662 | ||
4663 | /* If we decided that this buffer isn't suitable for line numbers, | |
4664 | don't forget that too fast. */ | |
4665 | if (EQ (w->base_line_pos, w->buffer)) | |
766525bc | 4666 | goto no_value; |
5300fd39 RS |
4667 | /* But do forget it, if the window shows a different buffer now. */ |
4668 | else if (BUFFERP (w->base_line_pos)) | |
4669 | w->base_line_pos = Qnil; | |
aa6d10fa RS |
4670 | |
4671 | /* If the buffer is very big, don't waste time. */ | |
d39b6696 | 4672 | if (BUF_ZV (b) - BUF_BEGV (b) > line_number_display_limit) |
aa6d10fa RS |
4673 | { |
4674 | w->base_line_pos = Qnil; | |
4675 | w->base_line_number = Qnil; | |
766525bc | 4676 | goto no_value; |
aa6d10fa RS |
4677 | } |
4678 | ||
4679 | if (!NILP (w->base_line_number) | |
4680 | && !NILP (w->base_line_pos) | |
12adba34 | 4681 | && XFASTINT (w->base_line_pos) <= startpos) |
aa6d10fa RS |
4682 | { |
4683 | line = XFASTINT (w->base_line_number); | |
4684 | linepos = XFASTINT (w->base_line_pos); | |
12adba34 | 4685 | linepos_byte = buf_charpos_to_bytepos (b, linepos); |
aa6d10fa RS |
4686 | } |
4687 | else | |
4688 | { | |
4689 | line = 1; | |
d39b6696 | 4690 | linepos = BUF_BEGV (b); |
12adba34 | 4691 | linepos_byte = BUF_BEGV_BYTE (b); |
aa6d10fa RS |
4692 | } |
4693 | ||
4694 | /* Count lines from base line to window start position. */ | |
12adba34 RS |
4695 | nlines = display_count_lines (linepos, linepos_byte, |
4696 | startpos_byte, | |
4697 | startpos, &junk); | |
aa6d10fa RS |
4698 | |
4699 | topline = nlines + line; | |
4700 | ||
4701 | /* Determine a new base line, if the old one is too close | |
4702 | or too far away, or if we did not have one. | |
4703 | "Too close" means it's plausible a scroll-down would | |
4704 | go back past it. */ | |
d39b6696 | 4705 | if (startpos == BUF_BEGV (b)) |
aa6d10fa | 4706 | { |
c2213350 KH |
4707 | XSETFASTINT (w->base_line_number, topline); |
4708 | XSETFASTINT (w->base_line_pos, BUF_BEGV (b)); | |
aa6d10fa RS |
4709 | } |
4710 | else if (nlines < height + 25 || nlines > height * 3 + 50 | |
d39b6696 | 4711 | || linepos == BUF_BEGV (b)) |
aa6d10fa | 4712 | { |
d39b6696 | 4713 | int limit = BUF_BEGV (b); |
12adba34 | 4714 | int limit_byte = BUF_BEGV_BYTE (b); |
aa6d10fa RS |
4715 | int position; |
4716 | int distance = (height * 2 + 30) * 200; | |
4717 | ||
4718 | if (startpos - distance > limit) | |
12adba34 RS |
4719 | { |
4720 | limit = startpos - distance; | |
4721 | limit_byte = CHAR_TO_BYTE (limit); | |
4722 | } | |
aa6d10fa | 4723 | |
12adba34 RS |
4724 | nlines = display_count_lines (startpos, startpos_byte, |
4725 | limit_byte, | |
4726 | - (height * 2 + 30), | |
aa6d10fa RS |
4727 | &position); |
4728 | /* If we couldn't find the lines we wanted within | |
4729 | 200 chars per line, | |
4730 | give up on line numbers for this window. */ | |
12adba34 | 4731 | if (position == limit_byte && limit == startpos - distance) |
aa6d10fa RS |
4732 | { |
4733 | w->base_line_pos = w->buffer; | |
4734 | w->base_line_number = Qnil; | |
766525bc | 4735 | goto no_value; |
aa6d10fa RS |
4736 | } |
4737 | ||
c2213350 | 4738 | XSETFASTINT (w->base_line_number, topline - nlines); |
12adba34 | 4739 | XSETFASTINT (w->base_line_pos, BYTE_TO_CHAR (position)); |
aa6d10fa RS |
4740 | } |
4741 | ||
4742 | /* Now count lines from the start pos to point. */ | |
12adba34 RS |
4743 | nlines = display_count_lines (startpos, startpos_byte, |
4744 | PT_BYTE, PT, &junk); | |
aa6d10fa RS |
4745 | |
4746 | /* Record that we did display the line number. */ | |
4747 | line_number_displayed = 1; | |
4748 | ||
4749 | /* Make the string to show. */ | |
766525bc | 4750 | pint2str (decode_mode_spec_buf, spec_width, topline + nlines); |
aa6d10fa | 4751 | return decode_mode_spec_buf; |
766525bc RS |
4752 | no_value: |
4753 | { | |
4754 | char* p = decode_mode_spec_buf; | |
4755 | for (spec_width -= 2; spec_width > 0; --spec_width) *p++ = ' '; | |
4756 | strcpy (p, "??"); | |
4757 | return decode_mode_spec_buf; | |
4758 | } | |
aa6d10fa RS |
4759 | } |
4760 | break; | |
4761 | ||
a2889657 | 4762 | case 'm': |
d39b6696 | 4763 | obj = b->mode_name; |
a2889657 JB |
4764 | break; |
4765 | ||
4766 | case 'n': | |
d39b6696 | 4767 | if (BUF_BEGV (b) > BUF_BEG (b) || BUF_ZV (b) < BUF_Z (b)) |
a2889657 JB |
4768 | return " Narrow"; |
4769 | break; | |
4770 | ||
a2889657 JB |
4771 | case 'p': |
4772 | { | |
4773 | int pos = marker_position (w->start); | |
d39b6696 | 4774 | int total = BUF_ZV (b) - BUF_BEGV (b); |
a2889657 | 4775 | |
d39b6696 | 4776 | if (XFASTINT (w->window_end_pos) <= BUF_Z (b) - BUF_ZV (b)) |
a2889657 | 4777 | { |
d39b6696 | 4778 | if (pos <= BUF_BEGV (b)) |
a2889657 JB |
4779 | return "All"; |
4780 | else | |
4781 | return "Bottom"; | |
4782 | } | |
d39b6696 | 4783 | else if (pos <= BUF_BEGV (b)) |
a2889657 JB |
4784 | return "Top"; |
4785 | else | |
4786 | { | |
3c7d31b9 RS |
4787 | if (total > 1000000) |
4788 | /* Do it differently for a large value, to avoid overflow. */ | |
4789 | total = ((pos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
4790 | else | |
4791 | total = ((pos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
a2889657 JB |
4792 | /* We can't normally display a 3-digit number, |
4793 | so get us a 2-digit number that is close. */ | |
4794 | if (total == 100) | |
4795 | total = 99; | |
4796 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
4797 | return decode_mode_spec_buf; | |
4798 | } | |
4799 | } | |
4800 | ||
8ffcb79f RS |
4801 | /* Display percentage of size above the bottom of the screen. */ |
4802 | case 'P': | |
4803 | { | |
4804 | int toppos = marker_position (w->start); | |
d39b6696 KH |
4805 | int botpos = BUF_Z (b) - XFASTINT (w->window_end_pos); |
4806 | int total = BUF_ZV (b) - BUF_BEGV (b); | |
8ffcb79f | 4807 | |
d39b6696 | 4808 | if (botpos >= BUF_ZV (b)) |
8ffcb79f | 4809 | { |
d39b6696 | 4810 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
4811 | return "All"; |
4812 | else | |
4813 | return "Bottom"; | |
4814 | } | |
4815 | else | |
4816 | { | |
3c7d31b9 RS |
4817 | if (total > 1000000) |
4818 | /* Do it differently for a large value, to avoid overflow. */ | |
4819 | total = ((botpos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
4820 | else | |
4821 | total = ((botpos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
8ffcb79f RS |
4822 | /* We can't normally display a 3-digit number, |
4823 | so get us a 2-digit number that is close. */ | |
4824 | if (total == 100) | |
4825 | total = 99; | |
d39b6696 | 4826 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
4827 | sprintf (decode_mode_spec_buf, "Top%2d%%", total); |
4828 | else | |
4829 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
4830 | return decode_mode_spec_buf; | |
4831 | } | |
4832 | } | |
4833 | ||
1af9f229 RS |
4834 | case 's': |
4835 | /* status of process */ | |
4836 | obj = Fget_buffer_process (w->buffer); | |
4837 | if (NILP (obj)) | |
4838 | return "no process"; | |
4839 | #ifdef subprocesses | |
4840 | obj = Fsymbol_name (Fprocess_status (obj)); | |
4841 | #endif | |
4842 | break; | |
d39b6696 | 4843 | |
1af9f229 RS |
4844 | case 't': /* indicate TEXT or BINARY */ |
4845 | #ifdef MODE_LINE_BINARY_TEXT | |
4846 | return MODE_LINE_BINARY_TEXT (b); | |
4847 | #else | |
4848 | return "T"; | |
4849 | #endif | |
1c9241f5 KH |
4850 | |
4851 | case 'z': | |
4852 | /* coding-system (not including end-of-line format) */ | |
4853 | case 'Z': | |
4854 | /* coding-system (including end-of-line type) */ | |
4855 | { | |
4856 | int eol_flag = (c == 'Z'); | |
539b4d41 | 4857 | char *p = decode_mode_spec_buf; |
1c9241f5 | 4858 | |
d30e754b | 4859 | if (! FRAME_WINDOW_P (f)) |
1c9241f5 | 4860 | { |
11c52c4f RS |
4861 | /* No need to mention EOL here--the terminal never needs |
4862 | to do EOL conversion. */ | |
4863 | p = decode_mode_spec_coding (keyboard_coding.symbol, p, 0); | |
4864 | p = decode_mode_spec_coding (terminal_coding.symbol, p, 0); | |
1c9241f5 | 4865 | } |
f13c925f | 4866 | p = decode_mode_spec_coding (b->buffer_file_coding_system, |
539b4d41 | 4867 | p, eol_flag); |
f13c925f | 4868 | |
11c52c4f | 4869 | #if 0 /* This proves to be annoying; I think we can do without. -- rms. */ |
1c9241f5 KH |
4870 | #ifdef subprocesses |
4871 | obj = Fget_buffer_process (Fcurrent_buffer ()); | |
4872 | if (PROCESSP (obj)) | |
4873 | { | |
4874 | p = decode_mode_spec_coding (XPROCESS (obj)->decode_coding_system, | |
4875 | p, eol_flag); | |
4876 | p = decode_mode_spec_coding (XPROCESS (obj)->encode_coding_system, | |
4877 | p, eol_flag); | |
4878 | } | |
4879 | #endif /* subprocesses */ | |
11c52c4f | 4880 | #endif /* 0 */ |
1c9241f5 KH |
4881 | *p = 0; |
4882 | return decode_mode_spec_buf; | |
4883 | } | |
a2889657 | 4884 | } |
d39b6696 | 4885 | |
e24c997d | 4886 | if (STRINGP (obj)) |
a2889657 JB |
4887 | return (char *) XSTRING (obj)->data; |
4888 | else | |
4889 | return ""; | |
4890 | } | |
59b49f63 | 4891 | \f |
12adba34 RS |
4892 | /* Count up to COUNT lines starting from START / START_BYTE. |
4893 | But don't go beyond LIMIT_BYTE. | |
4894 | Return the number of lines thus found (always nonnegative). | |
59b49f63 | 4895 | |
12adba34 | 4896 | Set *BYTE_POS_PTR to 1 if we found COUNT lines, 0 if we hit LIMIT. */ |
59b49f63 RS |
4897 | |
4898 | static int | |
12adba34 RS |
4899 | display_count_lines (start, start_byte, limit_byte, count, byte_pos_ptr) |
4900 | int start, start_byte, limit_byte, count; | |
4901 | int *byte_pos_ptr; | |
59b49f63 | 4902 | { |
59b49f63 RS |
4903 | register unsigned char *cursor; |
4904 | unsigned char *base; | |
4905 | ||
4906 | register int ceiling; | |
4907 | register unsigned char *ceiling_addr; | |
12adba34 | 4908 | int orig_count = count; |
59b49f63 RS |
4909 | |
4910 | /* If we are not in selective display mode, | |
4911 | check only for newlines. */ | |
12adba34 RS |
4912 | int selective_display = (!NILP (current_buffer->selective_display) |
4913 | && !INTEGERP (current_buffer->selective_display)); | |
59b49f63 RS |
4914 | |
4915 | if (count > 0) | |
12adba34 RS |
4916 | { |
4917 | while (start_byte < limit_byte) | |
4918 | { | |
4919 | ceiling = BUFFER_CEILING_OF (start_byte); | |
4920 | ceiling = min (limit_byte - 1, ceiling); | |
4921 | ceiling_addr = BYTE_POS_ADDR (ceiling) + 1; | |
4922 | base = (cursor = BYTE_POS_ADDR (start_byte)); | |
4923 | while (1) | |
4924 | { | |
4925 | if (selective_display) | |
4926 | while (*cursor != '\n' && *cursor != 015 && ++cursor != ceiling_addr) | |
4927 | ; | |
4928 | else | |
4929 | while (*cursor != '\n' && ++cursor != ceiling_addr) | |
4930 | ; | |
4931 | ||
4932 | if (cursor != ceiling_addr) | |
4933 | { | |
4934 | if (--count == 0) | |
4935 | { | |
4936 | start_byte += cursor - base + 1; | |
4937 | *byte_pos_ptr = start_byte; | |
4938 | return orig_count; | |
4939 | } | |
4940 | else | |
4941 | if (++cursor == ceiling_addr) | |
4942 | break; | |
4943 | } | |
4944 | else | |
4945 | break; | |
4946 | } | |
4947 | start_byte += cursor - base; | |
4948 | } | |
4949 | } | |
59b49f63 RS |
4950 | else |
4951 | { | |
12adba34 RS |
4952 | while (start_byte > limit_byte) |
4953 | { | |
4954 | ceiling = BUFFER_FLOOR_OF (start_byte - 1); | |
4955 | ceiling = max (limit_byte, ceiling); | |
4956 | ceiling_addr = BYTE_POS_ADDR (ceiling) - 1; | |
4957 | base = (cursor = BYTE_POS_ADDR (start_byte - 1) + 1); | |
59b49f63 RS |
4958 | while (1) |
4959 | { | |
12adba34 RS |
4960 | if (selective_display) |
4961 | while (--cursor != ceiling_addr | |
4962 | && *cursor != '\n' && *cursor != 015) | |
4963 | ; | |
4964 | else | |
4965 | while (--cursor != ceiling_addr && *cursor != '\n') | |
4966 | ; | |
4967 | ||
59b49f63 RS |
4968 | if (cursor != ceiling_addr) |
4969 | { | |
4970 | if (++count == 0) | |
4971 | { | |
12adba34 RS |
4972 | start_byte += cursor - base + 1; |
4973 | *byte_pos_ptr = start_byte; | |
4974 | /* When scanning backwards, we should | |
4975 | not count the newline posterior to which we stop. */ | |
4976 | return - orig_count - 1; | |
59b49f63 RS |
4977 | } |
4978 | } | |
4979 | else | |
4980 | break; | |
4981 | } | |
12adba34 RS |
4982 | /* Here we add 1 to compensate for the last decrement |
4983 | of CURSOR, which took it past the valid range. */ | |
4984 | start_byte += cursor - base + 1; | |
59b49f63 RS |
4985 | } |
4986 | } | |
4987 | ||
12adba34 | 4988 | *byte_pos_ptr = limit_byte; |
aa6d10fa | 4989 | |
12adba34 RS |
4990 | if (count < 0) |
4991 | return - orig_count + count; | |
4992 | return orig_count - count; | |
aa6d10fa | 4993 | |
12adba34 | 4994 | } |
a2889657 JB |
4995 | \f |
4996 | /* Display STRING on one line of window W, starting at HPOS. | |
4997 | Display at position VPOS. Caller should have done get_display_line. | |
11e82b76 | 4998 | If VPOS == -1, display it as the current frame's title. |
90adcf20 | 4999 | LENGTH is the length of STRING, or -1 meaning STRING is null-terminated. |
a2889657 JB |
5000 | |
5001 | TRUNCATE is GLYPH to display at end if truncated. Zero for none. | |
5002 | ||
5003 | MINCOL is the first column ok to end at. (Pad with spaces to this col.) | |
5004 | MAXCOL is the last column ok to end at. Truncate here. | |
5005 | -1 for MINCOL or MAXCOL means no explicit minimum or maximum. | |
44fa5b1e | 5006 | Both count from the left edge of the frame, as does HPOS. |
a2889657 JB |
5007 | The right edge of W is an implicit maximum. |
5008 | If TRUNCATE is nonzero, the implicit maximum is one column before the edge. | |
5009 | ||
278feba9 RS |
5010 | OBEY_WINDOW_WIDTH says to put spaces or vertical bars |
5011 | at the place where the current window ends in this line | |
5012 | and not display anything beyond there. Otherwise, only MAXCOL | |
5013 | controls where to stop output. | |
5014 | ||
a3788d53 RS |
5015 | MULTIBYTE can be 0 meaning do not display multibyte chars, |
5016 | 1 meaning do display them, or -1 meaning obey the current buffer's | |
5017 | value of enable_multibyte_characters. | |
5018 | ||
278feba9 | 5019 | Returns ending hpos. */ |
a2889657 JB |
5020 | |
5021 | static int | |
278feba9 | 5022 | display_string (w, vpos, string, length, hpos, truncate, |
a3788d53 | 5023 | obey_window_width, mincol, maxcol, multibyte) |
a2889657 JB |
5024 | struct window *w; |
5025 | unsigned char *string; | |
90adcf20 | 5026 | int length; |
a2889657 JB |
5027 | int vpos, hpos; |
5028 | GLYPH truncate; | |
278feba9 | 5029 | int obey_window_width; |
a2889657 | 5030 | int mincol, maxcol; |
a3788d53 | 5031 | int multibyte; |
a2889657 JB |
5032 | { |
5033 | register int c; | |
d3413a53 | 5034 | int truncated; |
a2889657 JB |
5035 | register GLYPH *p1; |
5036 | int hscroll = XINT (w->hscroll); | |
253c7d2f | 5037 | int tab_width = XINT (XBUFFER (w->buffer)->tab_width); |
a2889657 JB |
5038 | register GLYPH *start; |
5039 | register GLYPH *end; | |
b1d1124b JB |
5040 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
5041 | struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (f); | |
a2889657 JB |
5042 | GLYPH *p1start = desired_glyphs->glyphs[vpos] + hpos; |
5043 | int window_width = XFASTINT (w->width); | |
5044 | ||
5045 | /* Use the standard display table, not the window's display table. | |
5046 | We don't want the mode line in rot13. */ | |
f908610f | 5047 | register struct Lisp_Char_Table *dp = 0; |
efc63ef0 | 5048 | int i; |
a2889657 | 5049 | |
a3788d53 RS |
5050 | if (multibyte == -1) |
5051 | multibyte = !NILP (current_buffer->enable_multibyte_characters); | |
5052 | /* Now multibyte is 1 if we should display multibyte characters. */ | |
5053 | ||
f908610f RS |
5054 | if (DISP_TABLE_P (Vstandard_display_table)) |
5055 | dp = XCHAR_TABLE (Vstandard_display_table); | |
a2889657 | 5056 | |
54ff581a | 5057 | if (tab_width <= 0 || tab_width > 1000) tab_width = 8; |
a2889657 JB |
5058 | |
5059 | p1 = p1start; | |
a27062f0 | 5060 | start = desired_glyphs->glyphs[vpos]; |
a2889657 | 5061 | |
278feba9 | 5062 | if (obey_window_width) |
b1d1124b | 5063 | { |
a27062f0 | 5064 | start += XFASTINT (w->left); |
278feba9 RS |
5065 | end = start + window_width - (truncate != 0); |
5066 | ||
73f194f1 | 5067 | if (!WINDOW_RIGHTMOST_P (w)) |
b1d1124b | 5068 | { |
73f194f1 | 5069 | if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_RIGHT (f)) |
278feba9 RS |
5070 | { |
5071 | int i; | |
b1d1124b | 5072 | |
5802e919 | 5073 | for (i = 0; i < FRAME_SCROLL_BAR_COLS (f); i++) |
278feba9 RS |
5074 | *end-- = ' '; |
5075 | } | |
73f194f1 | 5076 | else if (!FRAME_HAS_VERTICAL_SCROLL_BARS (f)) |
278feba9 | 5077 | *end-- = '|'; |
b1d1124b | 5078 | } |
b1d1124b | 5079 | } |
a2889657 | 5080 | |
278feba9 RS |
5081 | if (! obey_window_width |
5082 | || (maxcol >= 0 && end - desired_glyphs->glyphs[vpos] > maxcol)) | |
a2889657 | 5083 | end = desired_glyphs->glyphs[vpos] + maxcol; |
278feba9 | 5084 | |
efc63ef0 | 5085 | /* Store 0 in charstart for these columns. */ |
bd5dec8e | 5086 | for (i = (hpos >= 0 ? hpos : 0); i < end - p1start + hpos; i++) |
efc63ef0 RS |
5087 | desired_glyphs->charstarts[vpos][i] = 0; |
5088 | ||
a2889657 JB |
5089 | if (maxcol >= 0 && mincol > maxcol) |
5090 | mincol = maxcol; | |
5091 | ||
1c9241f5 KH |
5092 | if (length < 0) |
5093 | /* We need this value for multibyte characters. */ | |
5094 | length = strlen (string); | |
5095 | ||
d3413a53 RS |
5096 | /* We set truncated to 1 if we get stopped by trying to pass END |
5097 | (that is, trying to pass MAXCOL.) */ | |
5098 | truncated = 0; | |
5099 | while (1) | |
a2889657 | 5100 | { |
1c9241f5 KH |
5101 | int len; |
5102 | ||
5103 | if (length <= 0) | |
90adcf20 | 5104 | break; |
1c9241f5 KH |
5105 | if (multibyte) |
5106 | c = STRING_CHAR_AND_LENGTH (string, length, len); | |
5107 | else | |
5108 | c = *string, len = 1; | |
5109 | ||
5110 | string += len, length -= len; | |
90adcf20 | 5111 | |
d3413a53 RS |
5112 | if (p1 >= end) |
5113 | { | |
5114 | truncated = 1; | |
5115 | break; | |
5116 | } | |
5117 | ||
376b0e59 RS |
5118 | if (dp != 0 && VECTORP (DISP_CHAR_VECTOR (dp, c))) |
5119 | { | |
5120 | p1 = copy_part_of_rope (f, p1, start, | |
5121 | XVECTOR (DISP_CHAR_VECTOR (dp, c))->contents, | |
5122 | XVECTOR (DISP_CHAR_VECTOR (dp, c))->size, | |
5123 | 0); | |
5124 | } | |
5125 | else if (c >= 040 && c < 0177) | |
a2889657 JB |
5126 | { |
5127 | if (p1 >= start) | |
5128 | *p1 = c; | |
5129 | p1++; | |
5130 | } | |
5131 | else if (c == '\t') | |
5132 | { | |
5133 | do | |
5134 | { | |
5135 | if (p1 >= start && p1 < end) | |
5136 | *p1 = SPACEGLYPH; | |
5137 | p1++; | |
5138 | } | |
5139 | while ((p1 - start + hscroll - (hscroll > 0)) % tab_width); | |
5140 | } | |
ded34426 | 5141 | else if (c < 0200 && ! NILP (buffer_defaults.ctl_arrow)) |
a2889657 JB |
5142 | { |
5143 | if (p1 >= start) | |
e57bca5d KH |
5144 | *p1 = (fix_glyph |
5145 | (f, (dp && INTEGERP (DISP_CTRL_GLYPH (dp)) | |
5146 | && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (dp))) | |
5147 | ? XINT (DISP_CTRL_GLYPH (dp)) : '^'), | |
5148 | 0)); | |
a2889657 | 5149 | p1++; |
6e8290aa | 5150 | if (p1 >= start && p1 < end) |
a2889657 JB |
5151 | *p1 = c ^ 0100; |
5152 | p1++; | |
5153 | } | |
1c9241f5 | 5154 | else if (len == 1) |
a2889657 | 5155 | { |
1c9241f5 | 5156 | /* C is a control character or a binary byte data. */ |
a2889657 | 5157 | if (p1 >= start) |
e57bca5d KH |
5158 | *p1 = (fix_glyph |
5159 | (f, (dp && INTEGERP (DISP_ESCAPE_GLYPH (dp)) | |
5160 | && GLYPH_CHAR_VALID_P (XINT (DISP_ESCAPE_GLYPH (dp))) | |
5161 | ? XINT (DISP_ESCAPE_GLYPH (dp)) : '\\'), | |
5162 | 0)); | |
a2889657 | 5163 | p1++; |
6e8290aa | 5164 | if (p1 >= start && p1 < end) |
a2889657 JB |
5165 | *p1 = (c >> 6) + '0'; |
5166 | p1++; | |
6e8290aa | 5167 | if (p1 >= start && p1 < end) |
a2889657 JB |
5168 | *p1 = (7 & (c >> 3)) + '0'; |
5169 | p1++; | |
6e8290aa | 5170 | if (p1 >= start && p1 < end) |
a2889657 JB |
5171 | *p1 = (7 & c) + '0'; |
5172 | p1++; | |
5173 | } | |
1c9241f5 KH |
5174 | else |
5175 | { | |
5176 | /* C is a multibyte character. */ | |
5177 | int charset = CHAR_CHARSET (c); | |
5178 | int columns = (charset == CHARSET_COMPOSITION | |
5179 | ? cmpchar_table[COMPOSITE_CHAR_ID (c)]->width | |
5180 | : CHARSET_WIDTH (charset)); | |
5181 | ||
5182 | if (p1 < start) | |
5183 | { | |
5184 | /* Since we can't show the left part of C, fill all | |
5185 | columns with spaces. */ | |
5186 | columns -= start - p1; | |
5187 | p1 = start; | |
5188 | while (columns--) | |
5189 | { | |
5190 | if (p1 < end) | |
5191 | *p1 = SPACEGLYPH; | |
5192 | p1++; | |
5193 | } | |
5194 | } | |
5195 | else if (p1 + columns > end) | |
5196 | { | |
5197 | /* Since we can't show the right part of C, fill all | |
5198 | columns with TRUNCATE if TRUNCATE is specified. */ | |
5199 | if (truncate) | |
5200 | { | |
5201 | while (p1 < end) | |
5202 | *p1++ = fix_glyph (f, truncate, 0); | |
5203 | /* And tell the line is truncated. */ | |
5204 | truncated = 1; | |
5205 | } | |
5206 | break; | |
5207 | } | |
5208 | else | |
5209 | { | |
5210 | /* We can show the whole glyph of C. */ | |
5211 | *p1++ = c; | |
5212 | while (--columns) | |
5213 | *p1++ = c | GLYPH_MASK_PADDING; | |
5214 | } | |
5215 | } | |
a2889657 JB |
5216 | } |
5217 | ||
d3413a53 | 5218 | if (truncated) |
a2889657 JB |
5219 | { |
5220 | p1 = end; | |
278feba9 | 5221 | if (truncate) *p1++ = fix_glyph (f, truncate, 0); |
a2889657 JB |
5222 | } |
5223 | else if (mincol >= 0) | |
5224 | { | |
5225 | end = desired_glyphs->glyphs[vpos] + mincol; | |
5226 | while (p1 < end) | |
5227 | *p1++ = SPACEGLYPH; | |
5228 | } | |
5229 | ||
5230 | { | |
5231 | register int len = p1 - desired_glyphs->glyphs[vpos]; | |
5232 | ||
5233 | if (len > desired_glyphs->used[vpos]) | |
5234 | desired_glyphs->used[vpos] = len; | |
5235 | desired_glyphs->glyphs[vpos][desired_glyphs->used[vpos]] = 0; | |
5236 | ||
5237 | return len; | |
5238 | } | |
5239 | } | |
5240 | \f | |
642eefc6 RS |
5241 | /* This is like a combination of memq and assq. |
5242 | Return 1 if PROPVAL appears as an element of LIST | |
5243 | or as the car of an element of LIST. | |
af460d46 RS |
5244 | If PROPVAL is a list, compare each element against LIST |
5245 | in that way, and return 1 if any element of PROPVAL is found in LIST. | |
642eefc6 RS |
5246 | Otherwise return 0. |
5247 | This function cannot quit. */ | |
5248 | ||
5249 | int | |
5250 | invisible_p (propval, list) | |
5251 | register Lisp_Object propval; | |
5252 | Lisp_Object list; | |
5253 | { | |
af460d46 RS |
5254 | register Lisp_Object tail, proptail; |
5255 | for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr) | |
642eefc6 RS |
5256 | { |
5257 | register Lisp_Object tem; | |
af460d46 | 5258 | tem = XCONS (tail)->car; |
642eefc6 RS |
5259 | if (EQ (propval, tem)) |
5260 | return 1; | |
5261 | if (CONSP (tem) && EQ (propval, XCONS (tem)->car)) | |
5262 | return 1; | |
5263 | } | |
af460d46 RS |
5264 | if (CONSP (propval)) |
5265 | for (proptail = propval; CONSP (proptail); | |
5266 | proptail = XCONS (proptail)->cdr) | |
5267 | { | |
5268 | Lisp_Object propelt; | |
5269 | propelt = XCONS (proptail)->car; | |
5270 | for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr) | |
5271 | { | |
5272 | register Lisp_Object tem; | |
5273 | tem = XCONS (tail)->car; | |
5274 | if (EQ (propelt, tem)) | |
5275 | return 1; | |
5276 | if (CONSP (tem) && EQ (propelt, XCONS (tem)->car)) | |
5277 | return 1; | |
5278 | } | |
5279 | } | |
642eefc6 RS |
5280 | return 0; |
5281 | } | |
5282 | ||
5283 | /* Return 1 if PROPVAL appears as the car of an element of LIST | |
5284 | and the cdr of that element is non-nil. | |
af460d46 RS |
5285 | If PROPVAL is a list, check each element of PROPVAL in that way, |
5286 | and the first time some element is found, | |
5287 | return 1 if the cdr of that element is non-nil. | |
642eefc6 RS |
5288 | Otherwise return 0. |
5289 | This function cannot quit. */ | |
5290 | ||
5291 | int | |
5292 | invisible_ellipsis_p (propval, list) | |
5293 | register Lisp_Object propval; | |
5294 | Lisp_Object list; | |
5295 | { | |
af460d46 RS |
5296 | register Lisp_Object tail, proptail; |
5297 | for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr) | |
642eefc6 RS |
5298 | { |
5299 | register Lisp_Object tem; | |
af460d46 | 5300 | tem = XCONS (tail)->car; |
642eefc6 RS |
5301 | if (CONSP (tem) && EQ (propval, XCONS (tem)->car)) |
5302 | return ! NILP (XCONS (tem)->cdr); | |
5303 | } | |
af460d46 RS |
5304 | if (CONSP (propval)) |
5305 | for (proptail = propval; CONSP (proptail); | |
5306 | proptail = XCONS (proptail)->cdr) | |
5307 | { | |
5308 | Lisp_Object propelt; | |
5309 | propelt = XCONS (proptail)->car; | |
5310 | for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr) | |
5311 | { | |
5312 | register Lisp_Object tem; | |
5313 | tem = XCONS (tail)->car; | |
5314 | if (CONSP (tem) && EQ (propelt, XCONS (tem)->car)) | |
5315 | return ! NILP (XCONS (tem)->cdr); | |
5316 | } | |
5317 | } | |
642eefc6 RS |
5318 | return 0; |
5319 | } | |
5320 | \f | |
a2889657 JB |
5321 | void |
5322 | syms_of_xdisp () | |
5323 | { | |
cf074754 RS |
5324 | staticpro (&Qmenu_bar_update_hook); |
5325 | Qmenu_bar_update_hook = intern ("menu-bar-update-hook"); | |
5326 | ||
d46fb96a | 5327 | staticpro (&Qoverriding_terminal_local_map); |
7079aefa | 5328 | Qoverriding_terminal_local_map = intern ("overriding-terminal-local-map"); |
d46fb96a | 5329 | |
399164b4 KH |
5330 | staticpro (&Qoverriding_local_map); |
5331 | Qoverriding_local_map = intern ("overriding-local-map"); | |
5332 | ||
75c43375 RS |
5333 | staticpro (&Qwindow_scroll_functions); |
5334 | Qwindow_scroll_functions = intern ("window-scroll-functions"); | |
5335 | ||
e0bfbde6 RS |
5336 | staticpro (&Qredisplay_end_trigger_functions); |
5337 | Qredisplay_end_trigger_functions = intern ("redisplay-end-trigger-functions"); | |
67481ae5 | 5338 | |
a2889657 JB |
5339 | staticpro (&last_arrow_position); |
5340 | staticpro (&last_arrow_string); | |
5341 | last_arrow_position = Qnil; | |
5342 | last_arrow_string = Qnil; | |
5343 | ||
5344 | DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string, | |
8c45d522 | 5345 | "String (or mode line construct) included (normally) in `mode-line-format'."); |
a2889657 JB |
5346 | Vglobal_mode_string = Qnil; |
5347 | ||
5348 | DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position, | |
5349 | "Marker for where to display an arrow on top of the buffer text.\n\ | |
5350 | This must be the beginning of a line in order to work.\n\ | |
5351 | See also `overlay-arrow-string'."); | |
5352 | Voverlay_arrow_position = Qnil; | |
5353 | ||
5354 | DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string, | |
5355 | "String to display as an arrow. See also `overlay-arrow-position'."); | |
5356 | Voverlay_arrow_string = Qnil; | |
5357 | ||
5358 | DEFVAR_INT ("scroll-step", &scroll_step, | |
5359 | "*The number of lines to try scrolling a window by when point moves out.\n\ | |
44fa5b1e JB |
5360 | If that fails to bring point back on frame, point is centered instead.\n\ |
5361 | If this is zero, point is always centered after it moves off frame."); | |
a2889657 | 5362 | |
0789adb2 RS |
5363 | DEFVAR_INT ("scroll-conservatively", &scroll_conservatively, |
5364 | "*Scroll up to this many lines, to bring point back on screen."); | |
5365 | scroll_conservatively = 0; | |
5366 | ||
9afd2168 RS |
5367 | DEFVAR_INT ("scroll-margin", &scroll_margin, |
5368 | "*Number of lines of margin at the top and bottom of a window.\n\ | |
5369 | Recenter the window whenever point gets within this many lines\n\ | |
5370 | of the top or bottom of the window."); | |
5371 | scroll_margin = 0; | |
5372 | ||
a2889657 JB |
5373 | DEFVAR_INT ("debug-end-pos", &debug_end_pos, "Don't ask"); |
5374 | ||
5375 | DEFVAR_BOOL ("truncate-partial-width-windows", | |
5376 | &truncate_partial_width_windows, | |
44fa5b1e | 5377 | "*Non-nil means truncate lines in all windows less than full frame wide."); |
a2889657 JB |
5378 | truncate_partial_width_windows = 1; |
5379 | ||
5380 | DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video, | |
5381 | "*Non-nil means use inverse video for the mode line."); | |
5382 | mode_line_inverse_video = 1; | |
aa6d10fa RS |
5383 | |
5384 | DEFVAR_INT ("line-number-display-limit", &line_number_display_limit, | |
db4f2bfa KH |
5385 | "*Maximum buffer size (in characters) for line number display\n\ |
5386 | If the buffer is bigger than this, the line number does not appear\n\ | |
5387 | in the mode line.."); | |
aa6d10fa | 5388 | line_number_display_limit = 1000000; |
fba9ce76 RS |
5389 | |
5390 | DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows, | |
5391 | "*Non-nil means highlight region even in nonselected windows."); | |
293a54ce | 5392 | highlight_nonselected_windows = 0; |
d39b6696 KH |
5393 | |
5394 | DEFVAR_BOOL ("multiple-frames", &multiple_frames, | |
3450d04c KH |
5395 | "Non-nil if more than one frame is visible on this display.\n\ |
5396 | Minibuffer-only frames don't count, but iconified frames do.\n\ | |
4c2eb242 RS |
5397 | This variable is not guaranteed to be accurate except while processing\n\ |
5398 | `frame-title-format' and `icon-title-format'."); | |
d39b6696 KH |
5399 | |
5400 | DEFVAR_LISP ("frame-title-format", &Vframe_title_format, | |
5401 | "Template for displaying the titlebar of visible frames.\n\ | |
5402 | \(Assuming the window manager supports this feature.)\n\ | |
5403 | This variable has the same structure as `mode-line-format' (which see),\n\ | |
5404 | and is used only on frames for which no explicit name has been set\n\ | |
5405 | \(see `modify-frame-parameters')."); | |
5406 | DEFVAR_LISP ("icon-title-format", &Vicon_title_format, | |
5407 | "Template for displaying the titlebar of an iconified frame.\n\ | |
5408 | \(Assuming the window manager supports this feature.)\n\ | |
5409 | This variable has the same structure as `mode-line-format' (which see),\n\ | |
5410 | and is used only on frames for which no explicit name has been set\n\ | |
5411 | \(see `modify-frame-parameters')."); | |
5412 | Vicon_title_format | |
5413 | = Vframe_title_format | |
5414 | = Fcons (intern ("multiple-frames"), | |
5415 | Fcons (build_string ("%b"), | |
5416 | Fcons (Fcons (build_string (""), | |
5417 | Fcons (intern ("invocation-name"), | |
5418 | Fcons (build_string ("@"), | |
5419 | Fcons (intern ("system-name"), | |
5420 | Qnil)))), | |
5421 | Qnil))); | |
5992c4f7 KH |
5422 | |
5423 | DEFVAR_LISP ("message-log-max", &Vmessage_log_max, | |
5424 | "Maximum number of lines to keep in the message log buffer.\n\ | |
5425 | If nil, disable message logging. If t, log messages but don't truncate\n\ | |
5426 | the buffer when it becomes large."); | |
5427 | XSETFASTINT (Vmessage_log_max, 50); | |
08b610e4 RS |
5428 | |
5429 | DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions, | |
5430 | "Functions called before redisplay, if window sizes have changed.\n\ | |
5431 | The value should be a list of functions that take one argument.\n\ | |
5432 | Just before redisplay, for each frame, if any of its windows have changed\n\ | |
5433 | size since the last redisplay, or have been split or deleted,\n\ | |
5434 | all the functions in the list are called, with the frame as argument."); | |
5435 | Vwindow_size_change_functions = Qnil; | |
75c43375 RS |
5436 | |
5437 | DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions, | |
010494d0 | 5438 | "List of functions to call before redisplaying a window with scrolling.\n\ |
75c43375 | 5439 | Each function is called with two arguments, the window\n\ |
8d9583b0 RS |
5440 | and its new display-start position. Note that the value of `window-end'\n\ |
5441 | is not valid when these functions are called."); | |
75c43375 | 5442 | Vwindow_scroll_functions = Qnil; |
010494d0 KH |
5443 | |
5444 | DEFVAR_INT ("minibuffer-scroll-overlap", &minibuffer_scroll_overlap, | |
5445 | "*Number of characters of overlap when scrolling a one-line window.\n\ | |
5446 | This commonly affects the minibuffer window, hence the name of the variable."); | |
5447 | minibuffer_scroll_overlap = 20; | |
a2889657 JB |
5448 | } |
5449 | ||
5450 | /* initialize the window system */ | |
5451 | init_xdisp () | |
5452 | { | |
5453 | Lisp_Object root_window; | |
5454 | #ifndef COMPILER_REGISTER_BUG | |
5455 | register | |
5456 | #endif /* COMPILER_REGISTER_BUG */ | |
5457 | struct window *mini_w; | |
5458 | ||
5459 | this_line_bufpos = 0; | |
5460 | ||
5461 | mini_w = XWINDOW (minibuf_window); | |
11e82b76 | 5462 | root_window = FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w))); |
a2889657 JB |
5463 | |
5464 | echo_area_glyphs = 0; | |
5465 | previous_echo_glyphs = 0; | |
5466 | ||
5467 | if (!noninteractive) | |
5468 | { | |
44fa5b1e | 5469 | FRAME_PTR f = XFRAME (WINDOW_FRAME (XWINDOW (root_window))); |
12c226c5 RS |
5470 | XSETFASTINT (XWINDOW (root_window)->top, FRAME_MENU_BAR_LINES (f)); |
5471 | set_window_height (root_window, | |
5472 | FRAME_HEIGHT (f) - 1 - FRAME_MENU_BAR_LINES (f), | |
5473 | 0); | |
c2213350 | 5474 | XSETFASTINT (mini_w->top, FRAME_HEIGHT (f) - 1); |
a2889657 JB |
5475 | set_window_height (minibuf_window, 1, 0); |
5476 | ||
c2213350 KH |
5477 | XSETFASTINT (XWINDOW (root_window)->width, FRAME_WIDTH (f)); |
5478 | XSETFASTINT (mini_w->width, FRAME_WIDTH (f)); | |
a2889657 JB |
5479 | } |
5480 | } |