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; | |
5992c4f7 KH |
293 | |
294 | oldbuf = current_buffer; | |
3c6595e0 | 295 | Fset_buffer (Fget_buffer_create (build_string ("*Messages*"))); |
16c300fb | 296 | current_buffer->undo_list = Qt; |
12adba34 RS |
297 | |
298 | oldpoint = Fpoint_marker (); | |
299 | oldbegv = Fpoint_min_marker (); | |
300 | oldzv = Fpoint_max_marker (); | |
301 | ||
6f0429a9 | 302 | if (PT == Z) |
bab29e15 | 303 | point_at_end = 1; |
6f0429a9 | 304 | if (ZV == Z) |
bab29e15 | 305 | zv_at_end = 1; |
12adba34 RS |
306 | |
307 | BEGV = BEG; | |
308 | BEGV_BYTE = BEG_BYTE; | |
309 | ZV = Z; | |
310 | ZV_BYTE = Z_BYTE; | |
311 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
bab29e15 RS |
312 | |
313 | /* Insert the string--maybe converting multibyte to single byte | |
314 | or vice versa, so that all the text fits the buffer. */ | |
0a9dc68b | 315 | if (multibyte |
bab29e15 RS |
316 | && NILP (current_buffer->enable_multibyte_characters)) |
317 | { | |
318 | int c, i = 0, nbytes; | |
319 | /* Convert a multibyte string to single-byte | |
320 | for the *Message* buffer. */ | |
321 | while (i < len) | |
322 | { | |
323 | c = STRING_CHAR (m + i, len - i); | |
324 | i += XFASTINT (Fchar_bytes (make_number (c))); | |
325 | /* Truncate the character to its last byte--we can only hope | |
326 | the user is happy with the character he gets, | |
327 | since if it isn't right, there is no way to do it right. */ | |
328 | c &= 0xff; | |
329 | insert_char (c); | |
330 | } | |
331 | } | |
0a9dc68b | 332 | else if (! multibyte |
bab29e15 RS |
333 | && ! NILP (current_buffer->enable_multibyte_characters)) |
334 | { | |
6f0429a9 | 335 | int i = 0; |
bd4f53cc | 336 | unsigned char *msg = (unsigned char *) m; |
bab29e15 RS |
337 | /* Convert a single-byte string to multibyte |
338 | for the *Message* buffer. */ | |
339 | while (i < len) | |
340 | { | |
bd4f53cc | 341 | int c = unibyte_char_to_multibyte (msg[i++]); |
bab29e15 RS |
342 | insert_char (c); |
343 | } | |
344 | } | |
345 | else if (len) | |
12adba34 | 346 | insert_1 (m, len, 1, 0, 0); |
bab29e15 | 347 | |
f88eb0b6 | 348 | if (nlflag) |
5992c4f7 | 349 | { |
12adba34 RS |
350 | int this_bol, this_bol_byte, prev_bol, prev_bol_byte, dup; |
351 | insert_1 ("\n", 1, 1, 0, 0); | |
352 | ||
353 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, -2, 0); | |
354 | this_bol = PT; | |
355 | this_bol_byte = PT_BYTE; | |
ff6c30e5 | 356 | |
ff6c30e5 KH |
357 | if (this_bol > BEG) |
358 | { | |
6f0429a9 | 359 | scan_newline (PT, PT_BYTE, BEG, BEG_BYTE, -2, 0); |
12adba34 RS |
360 | prev_bol = PT; |
361 | prev_bol_byte = PT_BYTE; | |
362 | ||
2d3ae3f0 KH |
363 | dup = message_log_check_duplicate (prev_bol, prev_bol_byte, |
364 | this_bol, this_bol_byte); | |
ff6c30e5 KH |
365 | if (dup) |
366 | { | |
bc69581b KH |
367 | del_range_both (prev_bol, prev_bol_byte, |
368 | this_bol, this_bol_byte, 0); | |
ff6c30e5 KH |
369 | if (dup > 1) |
370 | { | |
371 | char dupstr[40]; | |
372 | int duplen; | |
373 | ||
374 | /* If you change this format, don't forget to also | |
375 | change message_log_check_duplicate. */ | |
376 | sprintf (dupstr, " [%d times]", dup); | |
377 | duplen = strlen (dupstr); | |
12adba34 RS |
378 | TEMP_SET_PT_BOTH (Z - 1, Z_BYTE - 1); |
379 | insert_1 (dupstr, duplen, 1, 0, 1); | |
ff6c30e5 KH |
380 | } |
381 | } | |
382 | } | |
383 | ||
384 | if (NATNUMP (Vmessage_log_max)) | |
385 | { | |
12adba34 RS |
386 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, |
387 | -XFASTINT (Vmessage_log_max) - 1, 0); | |
bc69581b | 388 | del_range_both (BEG, BEG_BYTE, PT, PT_BYTE, 0); |
ff6c30e5 | 389 | } |
5992c4f7 | 390 | } |
12adba34 RS |
391 | BEGV = XMARKER (oldbegv)->charpos; |
392 | BEGV_BYTE = marker_byte_position (oldbegv); | |
393 | ||
bab29e15 | 394 | if (zv_at_end) |
12adba34 RS |
395 | { |
396 | ZV = Z; | |
397 | ZV_BYTE = Z_BYTE; | |
398 | } | |
bab29e15 | 399 | else |
12adba34 RS |
400 | { |
401 | ZV = XMARKER (oldzv)->charpos; | |
402 | ZV_BYTE = marker_byte_position (oldzv); | |
403 | } | |
404 | ||
bab29e15 | 405 | if (point_at_end) |
12adba34 | 406 | TEMP_SET_PT_BOTH (Z, Z_BYTE); |
bab29e15 | 407 | else |
12adba34 RS |
408 | Fgoto_char (oldpoint); |
409 | ||
410 | free_marker (oldpoint); | |
411 | free_marker (oldbegv); | |
412 | free_marker (oldzv); | |
413 | ||
5992c4f7 | 414 | set_buffer_internal (oldbuf); |
69f033ab | 415 | windows_or_buffers_changed = old_windows_or_buffers_changed; |
3c6595e0 | 416 | message_log_need_newline = !nlflag; |
5992c4f7 | 417 | } |
f88eb0b6 KH |
418 | } |
419 | ||
ff6c30e5 KH |
420 | /* We are at the end of the buffer after just having inserted a newline. |
421 | (Note: We depend on the fact we won't be crossing the gap.) | |
422 | Check to see if the most recent message looks a lot like the previous one. | |
423 | Return 0 if different, 1 if the new one should just replace it, or a | |
424 | value N > 1 if we should also append " [N times]". */ | |
f82aff7c | 425 | |
ff6c30e5 | 426 | static int |
12adba34 | 427 | message_log_check_duplicate (prev_bol, prev_bol_byte, this_bol, this_bol_byte) |
ff6c30e5 | 428 | int prev_bol, this_bol; |
12adba34 | 429 | int prev_bol_byte, this_bol_byte; |
ff6c30e5 KH |
430 | { |
431 | int i; | |
432 | int len = Z - 1 - this_bol; | |
433 | int seen_dots = 0; | |
12adba34 RS |
434 | unsigned char *p1 = BUF_BYTE_ADDRESS (current_buffer, prev_bol_byte); |
435 | unsigned char *p2 = BUF_BYTE_ADDRESS (current_buffer, this_bol_byte); | |
ff6c30e5 KH |
436 | |
437 | for (i = 0; i < len; i++) | |
438 | { | |
439 | if (i >= 3 && p1[i-3] == '.' && p1[i-2] == '.' && p1[i-1] == '.' | |
440 | && p1[i] != '\n') | |
441 | seen_dots = 1; | |
442 | if (p1[i] != p2[i]) | |
443 | return seen_dots; | |
444 | } | |
445 | p1 += len; | |
446 | if (*p1 == '\n') | |
447 | return 2; | |
448 | if (*p1++ == ' ' && *p1++ == '[') | |
449 | { | |
450 | int n = 0; | |
451 | while (*p1 >= '0' && *p1 <= '9') | |
452 | n = n * 10 + *p1++ - '0'; | |
453 | if (strncmp (p1, " times]\n", 8) == 0) | |
454 | return n+1; | |
455 | } | |
456 | return 0; | |
457 | } | |
1adc55de | 458 | \f |
f88eb0b6 | 459 | /* Display an echo area message M with a specified length of LEN chars. |
1adc55de | 460 | The string may include null characters. If M is 0, clear out any |
f88eb0b6 | 461 | existing message, and let the minibuffer text show through. |
1adc55de RS |
462 | |
463 | The buffer M must continue to exist until after the echo area | |
464 | gets cleared or some other message gets displayed there. | |
465 | ||
466 | Do not pass text that is stored in a Lisp string. | |
467 | Do not pass text in a buffer that was alloca'd. */ | |
f88eb0b6 KH |
468 | |
469 | void | |
0a9dc68b | 470 | message2 (m, len, multibyte) |
f88eb0b6 KH |
471 | char *m; |
472 | int len; | |
0a9dc68b | 473 | int multibyte; |
f88eb0b6 KH |
474 | { |
475 | /* First flush out any partial line written with print. */ | |
3c6595e0 | 476 | message_log_maybe_newline (); |
f88eb0b6 | 477 | if (m) |
0a9dc68b RS |
478 | message_dolog (m, len, 1, multibyte); |
479 | message2_nolog (m, len, multibyte); | |
5992c4f7 KH |
480 | } |
481 | ||
482 | ||
1adc55de | 483 | /* The non-logging counterpart of message2. */ |
5992c4f7 KH |
484 | |
485 | void | |
44461111 | 486 | message2_nolog (m, len, multibyte) |
5992c4f7 KH |
487 | char *m; |
488 | int len; | |
90adcf20 | 489 | { |
44461111 | 490 | message_enable_multibyte = multibyte; |
a3788d53 | 491 | |
90adcf20 RS |
492 | if (noninteractive) |
493 | { | |
494 | if (noninteractive_need_newline) | |
495 | putc ('\n', stderr); | |
496 | noninteractive_need_newline = 0; | |
c3597849 RS |
497 | if (m) |
498 | fwrite (m, len, 1, stderr); | |
90adcf20 RS |
499 | if (cursor_in_echo_area == 0) |
500 | fprintf (stderr, "\n"); | |
501 | fflush (stderr); | |
502 | } | |
503 | /* A null message buffer means that the frame hasn't really been | |
504 | initialized yet. Error messages get reported properly by | |
505 | cmd_error, so this must be just an informative message; toss it. */ | |
506 | else if (INTERACTIVE && FRAME_MESSAGE_BUF (selected_frame)) | |
507 | { | |
73af359d RS |
508 | Lisp_Object mini_window; |
509 | FRAME_PTR f; | |
90adcf20 | 510 | |
73af359d RS |
511 | /* Get the frame containing the minibuffer |
512 | that the selected frame is using. */ | |
513 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
514 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
515 | ||
73af359d | 516 | FRAME_SAMPLE_VISIBILITY (f); |
90adcf20 | 517 | if (FRAME_VISIBLE_P (selected_frame) |
73af359d RS |
518 | && ! FRAME_VISIBLE_P (f)) |
519 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window))); | |
90adcf20 RS |
520 | |
521 | if (m) | |
522 | { | |
523 | echo_area_glyphs = m; | |
524 | echo_area_glyphs_length = len; | |
b6436d4e RS |
525 | |
526 | if (minibuffer_auto_raise) | |
527 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); | |
90adcf20 | 528 | } |
ded34426 JB |
529 | else |
530 | echo_area_glyphs = previous_echo_glyphs = 0; | |
531 | ||
532 | do_pending_window_change (); | |
533 | echo_area_display (); | |
73af359d | 534 | update_frame (f, 1, 1); |
ded34426 | 535 | do_pending_window_change (); |
853cf346 | 536 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
73af359d | 537 | (*frame_up_to_date_hook) (f); |
ded34426 JB |
538 | } |
539 | } | |
1adc55de | 540 | \f |
0a9dc68b RS |
541 | /* Display in echo area the null-terminated ASCII-only string M. |
542 | If M is 0, clear out any existing message, | |
543 | and let the minibuffer text show through. | |
1adc55de | 544 | |
0a9dc68b | 545 | The string M must continue to exist until after the echo area |
1adc55de RS |
546 | gets cleared or some other message gets displayed there. |
547 | ||
548 | Do not pass text that is stored in a Lisp string. | |
549 | Do not pass text in a buffer that was alloca'd. */ | |
ded34426 | 550 | |
48ae5f0a KH |
551 | void |
552 | message1 (m) | |
553 | char *m; | |
554 | { | |
0a9dc68b | 555 | message2 (m, (m ? strlen (m) : 0), 0); |
48ae5f0a KH |
556 | } |
557 | ||
0b1005ef KH |
558 | void |
559 | message1_nolog (m) | |
560 | char *m; | |
561 | { | |
0a9dc68b RS |
562 | message2_nolog (m, (m ? strlen (m) : 0), 0); |
563 | } | |
564 | ||
565 | /* Display a message M which contains a single %s | |
566 | which gets replaced with STRING. */ | |
567 | ||
568 | void | |
569 | message_with_string (m, string, log) | |
570 | char *m; | |
571 | Lisp_Object string; | |
572 | int log; | |
573 | { | |
574 | if (noninteractive) | |
575 | { | |
576 | if (m) | |
577 | { | |
578 | if (noninteractive_need_newline) | |
579 | putc ('\n', stderr); | |
580 | noninteractive_need_newline = 0; | |
581 | fprintf (stderr, m, XSTRING (string)->data); | |
582 | if (cursor_in_echo_area == 0) | |
583 | fprintf (stderr, "\n"); | |
584 | fflush (stderr); | |
585 | } | |
586 | } | |
587 | else if (INTERACTIVE) | |
588 | { | |
589 | /* The frame whose minibuffer we're going to display the message on. | |
590 | It may be larger than the selected frame, so we need | |
591 | to use its buffer, not the selected frame's buffer. */ | |
592 | Lisp_Object mini_window; | |
593 | FRAME_PTR f; | |
594 | ||
595 | /* Get the frame containing the minibuffer | |
596 | that the selected frame is using. */ | |
597 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
598 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
599 | ||
600 | /* A null message buffer means that the frame hasn't really been | |
601 | initialized yet. Error messages get reported properly by | |
602 | cmd_error, so this must be just an informative message; toss it. */ | |
603 | if (FRAME_MESSAGE_BUF (f)) | |
604 | { | |
605 | int len; | |
606 | char *a[1]; | |
607 | a[0] = (char *) XSTRING (string)->data; | |
608 | ||
609 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
610 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); | |
611 | ||
612 | if (log) | |
613 | message2 (FRAME_MESSAGE_BUF (f), len, | |
614 | STRING_MULTIBYTE (string)); | |
615 | else | |
616 | message2_nolog (FRAME_MESSAGE_BUF (f), len, | |
617 | STRING_MULTIBYTE (string)); | |
618 | ||
619 | /* Print should start at the beginning of the message | |
620 | buffer next time. */ | |
621 | message_buf_print = 0; | |
622 | } | |
623 | } | |
0b1005ef KH |
624 | } |
625 | ||
76412d64 RS |
626 | /* Truncate what will be displayed in the echo area |
627 | the next time we display it--but don't redisplay it now. */ | |
628 | ||
629 | void | |
630 | truncate_echo_area (len) | |
631 | int len; | |
632 | { | |
633 | /* A null message buffer means that the frame hasn't really been | |
634 | initialized yet. Error messages get reported properly by | |
635 | cmd_error, so this must be just an informative message; toss it. */ | |
636 | if (!noninteractive && INTERACTIVE && FRAME_MESSAGE_BUF (selected_frame)) | |
637 | echo_area_glyphs_length = len; | |
638 | } | |
639 | ||
44fa5b1e | 640 | /* Nonzero if FRAME_MESSAGE_BUF (selected_frame) is being used by print; |
9c74a0dd JB |
641 | zero if being used by message. */ |
642 | int message_buf_print; | |
643 | ||
1adc55de | 644 | /* Dump an informative message to the minibuf. If M is 0, clear out |
81d478f3 | 645 | any existing message, and let the minibuffer text show through. */ |
1adc55de | 646 | |
a2889657 | 647 | /* VARARGS 1 */ |
a2889657 JB |
648 | void |
649 | message (m, a1, a2, a3) | |
650 | char *m; | |
5d5ed907 | 651 | EMACS_INT a1, a2, a3; |
a2889657 JB |
652 | { |
653 | if (noninteractive) | |
654 | { | |
81d478f3 JB |
655 | if (m) |
656 | { | |
657 | if (noninteractive_need_newline) | |
658 | putc ('\n', stderr); | |
659 | noninteractive_need_newline = 0; | |
660 | fprintf (stderr, m, a1, a2, a3); | |
c4f14ccb RS |
661 | if (cursor_in_echo_area == 0) |
662 | fprintf (stderr, "\n"); | |
81d478f3 JB |
663 | fflush (stderr); |
664 | } | |
a2889657 | 665 | } |
1f40cad2 | 666 | else if (INTERACTIVE) |
a2889657 | 667 | { |
1f40cad2 JB |
668 | /* The frame whose minibuffer we're going to display the message on. |
669 | It may be larger than the selected frame, so we need | |
670 | to use its buffer, not the selected frame's buffer. */ | |
73af359d RS |
671 | Lisp_Object mini_window; |
672 | FRAME_PTR f; | |
673 | ||
674 | /* Get the frame containing the minibuffer | |
675 | that the selected frame is using. */ | |
676 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
677 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
1f40cad2 JB |
678 | |
679 | /* A null message buffer means that the frame hasn't really been | |
680 | initialized yet. Error messages get reported properly by | |
681 | cmd_error, so this must be just an informative message; toss it. */ | |
73af359d | 682 | if (FRAME_MESSAGE_BUF (f)) |
81d478f3 | 683 | { |
1f40cad2 JB |
684 | if (m) |
685 | { | |
90adcf20 | 686 | int len; |
a2889657 | 687 | #ifdef NO_ARG_ARRAY |
d5315282 AS |
688 | char *a[3]; |
689 | a[0] = (char *) a1; | |
690 | a[1] = (char *) a2; | |
691 | a[2] = (char *) a3; | |
a2889657 | 692 | |
73af359d | 693 | len = doprnt (FRAME_MESSAGE_BUF (f), |
1c9241f5 | 694 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); |
a2889657 | 695 | #else |
73af359d | 696 | len = doprnt (FRAME_MESSAGE_BUF (f), |
12adba34 RS |
697 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, |
698 | (char **) &a1); | |
1f40cad2 | 699 | #endif /* NO_ARG_ARRAY */ |
1f40cad2 | 700 | |
0a9dc68b | 701 | message2 (FRAME_MESSAGE_BUF (f), len, 0); |
1f40cad2 JB |
702 | } |
703 | else | |
704 | message1 (0); | |
705 | ||
706 | /* Print should start at the beginning of the message | |
707 | buffer next time. */ | |
708 | message_buf_print = 0; | |
81d478f3 | 709 | } |
a2889657 JB |
710 | } |
711 | } | |
712 | ||
1adc55de | 713 | /* The non-logging version of message. */ |
6c4429a5 KH |
714 | void |
715 | message_nolog (m, a1, a2, a3) | |
716 | char *m; | |
717 | EMACS_INT a1, a2, a3; | |
718 | { | |
719 | Lisp_Object old_log_max; | |
720 | old_log_max = Vmessage_log_max; | |
721 | Vmessage_log_max = Qnil; | |
722 | message (m, a1, a2, a3); | |
723 | Vmessage_log_max = old_log_max; | |
724 | } | |
725 | ||
131f2133 RS |
726 | void |
727 | update_echo_area () | |
728 | { | |
0a9dc68b RS |
729 | message2 (echo_area_glyphs, echo_area_glyphs_length, |
730 | ! NILP (current_buffer->enable_multibyte_characters)); | |
131f2133 | 731 | } |
1adc55de | 732 | \f |
a2889657 JB |
733 | static void |
734 | echo_area_display () | |
735 | { | |
736 | register int vpos; | |
44fa5b1e | 737 | FRAME_PTR f; |
73af359d | 738 | Lisp_Object mini_window; |
a2889657 | 739 | |
73af359d RS |
740 | /* Choose the minibuffer window for this display. |
741 | It is the minibuffer window used by the selected frame. */ | |
742 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
743 | /* This is the frame that window is in. */ | |
744 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
a2889657 | 745 | |
44fa5b1e | 746 | if (! FRAME_VISIBLE_P (f)) |
a2889657 | 747 | return; |
a2889657 | 748 | |
44fa5b1e | 749 | if (frame_garbaged) |
a2889657 | 750 | { |
02a9b6e4 | 751 | redraw_garbaged_frames (); |
44fa5b1e | 752 | frame_garbaged = 0; |
a2889657 JB |
753 | } |
754 | ||
755 | if (echo_area_glyphs || minibuf_level == 0) | |
756 | { | |
a2f016e3 RS |
757 | int i; |
758 | ||
73af359d RS |
759 | echo_area_window = mini_window; |
760 | ||
761 | vpos = XFASTINT (XWINDOW (mini_window)->top); | |
44fa5b1e | 762 | get_display_line (f, vpos, 0); |
a2f016e3 RS |
763 | |
764 | /* Make sure the columns that overlap a left-hand scroll bar | |
765 | are always clear. */ | |
766 | for (i = 0; i < FRAME_LEFT_SCROLL_BAR_WIDTH (f); i++) | |
767 | f->desired_glyphs->glyphs[vpos][i] = SPACEGLYPH; | |
768 | ||
73af359d | 769 | display_string (XWINDOW (mini_window), vpos, |
a2889657 | 770 | echo_area_glyphs ? echo_area_glyphs : "", |
90adcf20 | 771 | echo_area_glyphs ? echo_area_glyphs_length : -1, |
73f194f1 | 772 | FRAME_LEFT_SCROLL_BAR_WIDTH (f), |
21e989e3 | 773 | 0, 0, 0, |
a3788d53 RS |
774 | FRAME_WIDTH (f) + FRAME_LEFT_SCROLL_BAR_WIDTH (f), |
775 | message_enable_multibyte); | |
a2889657 | 776 | |
b6f0fe04 | 777 | #if 0 /* This just gets in the way. update_frame does the job. */ |
a2889657 | 778 | /* If desired cursor location is on this line, put it at end of text */ |
b5bbc9a5 KH |
779 | if (cursor_in_echo_area) |
780 | FRAME_CURSOR_Y (f) = vpos; | |
44fa5b1e JB |
781 | if (FRAME_CURSOR_Y (f) == vpos) |
782 | FRAME_CURSOR_X (f) = FRAME_DESIRED_GLYPHS (f)->used[vpos]; | |
b6f0fe04 | 783 | #endif |
daa37602 JB |
784 | |
785 | /* Fill the rest of the minibuffer window with blank lines. */ | |
786 | { | |
787 | int i; | |
788 | ||
b2a76982 | 789 | for (i = vpos + 1; |
73af359d | 790 | i < vpos + XFASTINT (XWINDOW (mini_window)->height); i++) |
daa37602 | 791 | { |
44fa5b1e | 792 | get_display_line (f, i, 0); |
b8333774 RS |
793 | /* We don't use FRAME_SCROLL_BAR_WIDTH (f) as the starting |
794 | hpos, because it is good to clear whatever is behind the | |
795 | scroll bar. This does not affect the scroll bar itself. */ | |
e88dcae1 | 796 | display_string (XWINDOW (mini_window), i, |
73f194f1 | 797 | "", 0, |
b8333774 | 798 | 0, 0, 0, |
a3788d53 RS |
799 | 0, FRAME_WIDTH (f) + FRAME_SCROLL_BAR_WIDTH (f), |
800 | 0); | |
daa37602 JB |
801 | } |
802 | } | |
a2889657 | 803 | } |
73af359d | 804 | else if (!EQ (mini_window, selected_window)) |
a2889657 JB |
805 | windows_or_buffers_changed++; |
806 | ||
73af359d | 807 | if (EQ (mini_window, selected_window)) |
a2889657 JB |
808 | this_line_bufpos = 0; |
809 | ||
810 | previous_echo_glyphs = echo_area_glyphs; | |
811 | } | |
1adc55de RS |
812 | \f |
813 | /* Update frame titles. */ | |
96a410bc | 814 | |
8f3343d0 | 815 | #ifdef HAVE_WINDOW_SYSTEM |
d39b6696 KH |
816 | static char frame_title_buf[512]; |
817 | static char *frame_title_ptr; | |
96a410bc | 818 | |
d39b6696 KH |
819 | static int |
820 | store_frame_title (str, mincol, maxcol) | |
821 | char *str; | |
822 | int mincol, maxcol; | |
823 | { | |
824 | char *limit; | |
825 | if (maxcol < 0 || maxcol >= sizeof(frame_title_buf)) | |
826 | maxcol = sizeof (frame_title_buf); | |
827 | limit = &frame_title_buf[maxcol]; | |
828 | while (*str != '\0' && frame_title_ptr < limit) | |
829 | *frame_title_ptr++ = *str++; | |
830 | while (frame_title_ptr < &frame_title_buf[mincol]) | |
831 | *frame_title_ptr++ = ' '; | |
832 | return frame_title_ptr - frame_title_buf; | |
833 | } | |
96a410bc | 834 | |
96a410bc KH |
835 | static void |
836 | x_consider_frame_title (frame) | |
837 | Lisp_Object frame; | |
838 | { | |
d39b6696 KH |
839 | Lisp_Object fmt; |
840 | struct buffer *obuf; | |
841 | int len; | |
96a410bc KH |
842 | FRAME_PTR f = XFRAME (frame); |
843 | ||
8f3343d0 | 844 | if (!(FRAME_WINDOW_P (f) || FRAME_MINIBUF_ONLY_P (f) || f->explicit_name)) |
d39b6696 | 845 | return; |
3450d04c KH |
846 | |
847 | /* Do we have more than one visible frame on this X display? */ | |
848 | { | |
849 | Lisp_Object tail; | |
850 | ||
851 | for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr) | |
852 | { | |
853 | FRAME_PTR tf = XFRAME (XCONS (tail)->car); | |
854 | ||
c9492f08 KH |
855 | if (tf != f && FRAME_KBOARD (tf) == FRAME_KBOARD (f) |
856 | && !FRAME_MINIBUF_ONLY_P (tf) | |
3450d04c KH |
857 | && (FRAME_VISIBLE_P (tf) || FRAME_ICONIFIED_P (tf))) |
858 | break; | |
859 | } | |
860 | ||
861 | multiple_frames = CONSP (tail); | |
862 | } | |
863 | ||
d39b6696 KH |
864 | obuf = current_buffer; |
865 | Fset_buffer (XWINDOW (f->selected_window)->buffer); | |
866 | fmt = (FRAME_ICONIFIED_P (f) ? Vicon_title_format : Vframe_title_format); | |
867 | frame_title_ptr = frame_title_buf; | |
868 | len = display_mode_element (XWINDOW (f->selected_window), 0, 0, 0, | |
869 | 0, sizeof (frame_title_buf), fmt); | |
870 | frame_title_ptr = 0; | |
871 | set_buffer_internal (obuf); | |
872 | /* Set the name only if it's changed. This avoids consing | |
873 | in the common case where it hasn't. (If it turns out that we've | |
874 | already wasted too much time by walking through the list with | |
875 | display_mode_element, then we might need to optimize at a higher | |
876 | level than this.) */ | |
0a9dc68b | 877 | if (! STRINGP (f->name) || XSTRING (f->name)->size_byte != len |
d39b6696 KH |
878 | || bcmp (frame_title_buf, XSTRING (f->name)->data, len) != 0) |
879 | x_implicitly_set_name (f, make_string (frame_title_buf, len), Qnil); | |
96a410bc | 880 | } |
c7c9ca97 KH |
881 | #else |
882 | #define frame_title_ptr ((char *)0) | |
e39322d9 | 883 | #define store_frame_title(str, mincol, maxcol) 0 |
96a410bc | 884 | #endif |
a2889657 | 885 | \f |
90adcf20 | 886 | /* Prepare for redisplay by updating menu-bar item lists when appropriate. |
87382820 | 887 | This can call eval. */ |
90adcf20 RS |
888 | |
889 | void | |
890 | prepare_menu_bars () | |
891 | { | |
892 | register struct window *w = XWINDOW (selected_window); | |
893 | int all_windows; | |
08b610e4 | 894 | struct gcpro gcpro1, gcpro2; |
90adcf20 | 895 | |
ecf7de9b | 896 | all_windows = (update_mode_lines || buffer_shared > 1 |
28995e67 | 897 | || windows_or_buffers_changed); |
90adcf20 | 898 | |
feb0c42f KH |
899 | /* Update all frame titles based on their buffer names, etc. |
900 | We do this before the menu bars so that the buffer-menu | |
901 | will show the up-to-date frame titles. | |
902 | ||
903 | This used to be done after the menu bars, for a reason that | |
904 | was stated as follows but which I do not understand: | |
905 | "We do this after the menu bars so that the frame will first | |
906 | create its menu bar using the name `emacs' if no other name | |
907 | has yet been specified." | |
908 | I think that is no longer a concern. */ | |
8f3343d0 | 909 | #ifdef HAVE_WINDOW_SYSTEM |
d3f46cff | 910 | if (windows_or_buffers_changed || update_mode_lines) |
feb0c42f KH |
911 | { |
912 | Lisp_Object tail, frame; | |
913 | ||
914 | FOR_EACH_FRAME (tail, frame) | |
915 | if (FRAME_VISIBLE_P (XFRAME (frame)) | |
916 | || FRAME_ICONIFIED_P (XFRAME (frame))) | |
917 | x_consider_frame_title (frame); | |
918 | } | |
919 | #endif | |
920 | ||
90adcf20 RS |
921 | /* Update the menu bar item lists, if appropriate. |
922 | This has to be done before any actual redisplay | |
923 | or generation of display lines. */ | |
924 | if (all_windows) | |
925 | { | |
926 | Lisp_Object tail, frame; | |
a2725ab2 RS |
927 | int count = specpdl_ptr - specpdl; |
928 | ||
9cbab4ff | 929 | record_unwind_protect (Fstore_match_data, Fmatch_data (Qnil, Qnil)); |
90adcf20 RS |
930 | |
931 | FOR_EACH_FRAME (tail, frame) | |
08b610e4 RS |
932 | { |
933 | /* If a window on this frame changed size, | |
934 | report that to the user and clear the size-change flag. */ | |
935 | if (FRAME_WINDOW_SIZES_CHANGED (XFRAME (frame))) | |
936 | { | |
937 | Lisp_Object functions; | |
14510fee RS |
938 | /* Clear flag first in case we get error below. */ |
939 | FRAME_WINDOW_SIZES_CHANGED (XFRAME (frame)) = 0; | |
08b610e4 RS |
940 | functions = Vwindow_size_change_functions; |
941 | GCPRO2 (tail, functions); | |
942 | while (CONSP (functions)) | |
943 | { | |
944 | call1 (XCONS (functions)->car, frame); | |
945 | functions = XCONS (functions)->cdr; | |
946 | } | |
947 | UNGCPRO; | |
08b610e4 RS |
948 | } |
949 | GCPRO1 (tail); | |
a2725ab2 | 950 | update_menu_bar (XFRAME (frame), 0); |
08b610e4 RS |
951 | UNGCPRO; |
952 | } | |
a2725ab2 RS |
953 | |
954 | unbind_to (count, Qnil); | |
90adcf20 | 955 | } |
ecf7de9b | 956 | else |
a2725ab2 | 957 | update_menu_bar (selected_frame, 1); |
cd6dfed6 RS |
958 | |
959 | /* Motif needs this. See comment in xmenu.c. | |
960 | Turn it off when pending_menu_activation is not defined. */ | |
961 | #ifdef USE_X_TOOLKIT | |
962 | pending_menu_activation = 0; | |
963 | #endif | |
90adcf20 RS |
964 | } |
965 | \f | |
44fa5b1e | 966 | /* Do a frame update, taking possible shortcuts into account. |
a2889657 JB |
967 | This is the main external entry point for redisplay. |
968 | ||
969 | If the last redisplay displayed an echo area message and that | |
970 | message is no longer requested, we clear the echo area | |
971 | or bring back the minibuffer if that is in use. | |
972 | ||
90adcf20 RS |
973 | Do not call eval from within this function. |
974 | Calls to eval after the call to echo_area_display would confuse | |
975 | the display_line mechanism and would cause a crash. | |
976 | Calls to eval before that point will work most of the time, | |
977 | but can still lose, because this function | |
978 | can be called from signal handlers; with alarms set up; | |
a2889657 | 979 | or with synchronous processes running. |
90adcf20 | 980 | |
a2889657 JB |
981 | See Fcall_process; if you called it from here, it could be |
982 | entered recursively. */ | |
983 | ||
0d231165 RS |
984 | static int do_verify_charstarts; |
985 | ||
463f6b91 RS |
986 | /* Counter is used to clear the face cache |
987 | no more than once ever 1000 redisplays. */ | |
988 | static int clear_face_cache_count; | |
989 | ||
20de20dc RS |
990 | /* Record the previous terminal frame we displayed. */ |
991 | static FRAME_PTR previous_terminal_frame; | |
992 | ||
a2889657 JB |
993 | void |
994 | redisplay () | |
e9874cee RS |
995 | { |
996 | redisplay_internal (0); | |
997 | } | |
998 | ||
999 | /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay | |
1000 | is not in response to any user action; therefore, we should | |
94a66eea RS |
1001 | preserve the echo area. (Actually, our caller does that job.) |
1002 | Perhaps in the future avoid recentering windows | |
e9874cee RS |
1003 | if it is not necessary; currently that causes some problems. */ |
1004 | ||
1005 | static void | |
1006 | redisplay_internal (preserve_echo_area) | |
1007 | int preserve_echo_area; | |
a2889657 JB |
1008 | { |
1009 | register struct window *w = XWINDOW (selected_window); | |
1010 | register int pause; | |
1011 | int must_finish = 0; | |
1012 | int all_windows; | |
1013 | register int tlbufpos, tlendpos; | |
1014 | struct position pos; | |
89819bdd | 1015 | int number_of_visible_frames; |
a2889657 JB |
1016 | |
1017 | if (noninteractive) | |
1018 | return; | |
1019 | ||
15f0cf78 RS |
1020 | #ifdef USE_X_TOOLKIT |
1021 | if (popup_activated ()) | |
1022 | return; | |
1023 | #endif | |
1024 | ||
8b32d885 RS |
1025 | retry: |
1026 | ||
fd8ff63d | 1027 | if (! FRAME_WINDOW_P (selected_frame) |
20de20dc RS |
1028 | && previous_terminal_frame != selected_frame) |
1029 | { | |
1030 | /* Since frames on an ASCII terminal share the same display area, | |
1031 | displaying a different frame means redisplay the whole thing. */ | |
1032 | windows_or_buffers_changed++; | |
1033 | SET_FRAME_GARBAGED (selected_frame); | |
1034 | XSETFRAME (Vterminal_frame, selected_frame); | |
1035 | } | |
1036 | previous_terminal_frame = selected_frame; | |
20de20dc | 1037 | |
d724d989 JB |
1038 | /* Set the visible flags for all frames. |
1039 | Do this before checking for resized or garbaged frames; they want | |
1040 | to know if their frames are visible. | |
1041 | See the comment in frame.h for FRAME_SAMPLE_VISIBILITY. */ | |
1042 | { | |
35f56f96 | 1043 | Lisp_Object tail, frame; |
d724d989 | 1044 | |
89819bdd RS |
1045 | number_of_visible_frames = 0; |
1046 | ||
35f56f96 | 1047 | FOR_EACH_FRAME (tail, frame) |
f82aff7c RS |
1048 | { |
1049 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
1050 | ||
8e83f802 RS |
1051 | if (FRAME_VISIBLE_P (XFRAME (frame))) |
1052 | number_of_visible_frames++; | |
89819bdd | 1053 | |
f82aff7c RS |
1054 | /* Clear out all the display lines in which we will generate the |
1055 | glyphs to display. */ | |
1056 | init_desired_glyphs (XFRAME (frame)); | |
1057 | } | |
d724d989 JB |
1058 | } |
1059 | ||
44fa5b1e | 1060 | /* Notice any pending interrupt request to change frame size. */ |
a2889657 JB |
1061 | do_pending_window_change (); |
1062 | ||
44fa5b1e | 1063 | if (frame_garbaged) |
a2889657 | 1064 | { |
02a9b6e4 | 1065 | redraw_garbaged_frames (); |
44fa5b1e | 1066 | frame_garbaged = 0; |
a2889657 JB |
1067 | } |
1068 | ||
f82aff7c RS |
1069 | prepare_menu_bars (); |
1070 | ||
28995e67 | 1071 | if (windows_or_buffers_changed) |
a2889657 JB |
1072 | update_mode_lines++; |
1073 | ||
538f13d4 RS |
1074 | /* Detect case that we need to write or remove a star in the mode line. */ |
1075 | if ((SAVE_MODIFF < MODIFF) != !NILP (w->last_had_star)) | |
a2889657 JB |
1076 | { |
1077 | w->update_mode_line = Qt; | |
1078 | if (buffer_shared > 1) | |
1079 | update_mode_lines++; | |
1080 | } | |
1081 | ||
28995e67 RS |
1082 | /* If %c is in use, update it if needed. */ |
1083 | if (!NILP (w->column_number_displayed) | |
1084 | /* This alternative quickly identifies a common case | |
1085 | where no change is needed. */ | |
1086 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
1087 | && XFASTINT (w->last_modified) >= MODIFF |
1088 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
1089 | && XFASTINT (w->column_number_displayed) != current_column ()) |
1090 | w->update_mode_line = Qt; | |
1091 | ||
44fa5b1e | 1092 | FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w->frame)) = -1; |
a2889657 JB |
1093 | |
1094 | all_windows = update_mode_lines || buffer_shared > 1; | |
a2889657 JB |
1095 | |
1096 | /* If specs for an arrow have changed, do thorough redisplay | |
1097 | to ensure we remove any arrow that should no longer exist. */ | |
d45de95b | 1098 | if (! EQ (COERCE_MARKER (Voverlay_arrow_position), last_arrow_position) |
ded34426 | 1099 | || ! EQ (Voverlay_arrow_string, last_arrow_string)) |
28995e67 | 1100 | all_windows = 1; |
a2889657 | 1101 | |
90adcf20 RS |
1102 | /* Normally the message* functions will have already displayed and |
1103 | updated the echo area, but the frame may have been trashed, or | |
1104 | the update may have been preempted, so display the echo area | |
1105 | again here. */ | |
1106 | if (echo_area_glyphs || previous_echo_glyphs) | |
1107 | { | |
1108 | echo_area_display (); | |
1109 | must_finish = 1; | |
1110 | } | |
1111 | ||
bd66d1ba RS |
1112 | /* If showing region, and mark has changed, must redisplay whole window. */ |
1113 | if (((!NILP (Vtransient_mark_mode) | |
1114 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
1115 | != !NILP (w->region_showing)) | |
82d04750 JB |
1116 | || (!NILP (w->region_showing) |
1117 | && !EQ (w->region_showing, | |
1118 | Fmarker_position (XBUFFER (w->buffer)->mark)))) | |
bd66d1ba RS |
1119 | this_line_bufpos = -1; |
1120 | ||
a2889657 JB |
1121 | tlbufpos = this_line_bufpos; |
1122 | tlendpos = this_line_endpos; | |
265a9e55 | 1123 | if (!all_windows && tlbufpos > 0 && NILP (w->update_mode_line) |
73af359d | 1124 | && !current_buffer->clip_changed |
44fa5b1e | 1125 | && FRAME_VISIBLE_P (XFRAME (w->frame)) |
f21ef775 | 1126 | && !FRAME_OBSCURED_P (XFRAME (w->frame)) |
a2889657 JB |
1127 | /* Make sure recorded data applies to current buffer, etc */ |
1128 | && this_line_buffer == current_buffer | |
1129 | && current_buffer == XBUFFER (w->buffer) | |
265a9e55 | 1130 | && NILP (w->force_start) |
a2889657 | 1131 | /* Point must be on the line that we have info recorded about */ |
ae3b1442 KH |
1132 | && PT >= tlbufpos |
1133 | && PT <= Z - tlendpos | |
a2889657 JB |
1134 | /* All text outside that line, including its final newline, |
1135 | must be unchanged */ | |
8850a573 RS |
1136 | && ((XFASTINT (w->last_modified) >= MODIFF |
1137 | && (XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF)) | |
a2889657 JB |
1138 | || (beg_unchanged >= tlbufpos - 1 |
1139 | && GPT >= tlbufpos | |
05ba02eb JB |
1140 | /* If selective display, can't optimize |
1141 | if the changes start at the beginning of the line. */ | |
e24c997d | 1142 | && ((INTEGERP (current_buffer->selective_display) |
05ba02eb JB |
1143 | && XINT (current_buffer->selective_display) > 0 |
1144 | ? (beg_unchanged >= tlbufpos | |
1145 | && GPT > tlbufpos) | |
1146 | : 1)) | |
a2889657 JB |
1147 | && end_unchanged >= tlendpos |
1148 | && Z - GPT >= tlendpos))) | |
1149 | { | |
12adba34 RS |
1150 | int tlbufpos_byte = CHAR_TO_BYTE (tlbufpos); |
1151 | if (tlbufpos > BEGV && FETCH_BYTE (tlbufpos_byte - 1) != '\n' | |
a2889657 | 1152 | && (tlbufpos == ZV |
12adba34 | 1153 | || FETCH_BYTE (tlbufpos_byte) == '\n')) |
a2889657 JB |
1154 | /* Former continuation line has disappeared by becoming empty */ |
1155 | goto cancel; | |
1156 | else if (XFASTINT (w->last_modified) < MODIFF | |
8850a573 | 1157 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF |
a2889657 JB |
1158 | || MINI_WINDOW_P (w)) |
1159 | { | |
1c9241f5 KH |
1160 | /* We have to handle the case of continuation around a |
1161 | wide-column character (See the comment in indent.c around | |
1162 | line 885). | |
1163 | ||
1164 | For instance, in the following case: | |
1165 | ||
1166 | -------- Insert -------- | |
1167 | K_A_N_\\ `a' K_A_N_a\ `X_' are wide-column chars. | |
1168 | J_I_ ==> J_I_ `^^' are cursors. | |
1169 | ^^ ^^ | |
1170 | -------- -------- | |
1171 | ||
1172 | As we have to redraw the line above, we should goto cancel. */ | |
1173 | ||
1174 | struct position val; | |
1175 | int prevline; | |
12adba34 | 1176 | int opoint = PT, opoint_byte = PT_BYTE; |
1c9241f5 | 1177 | |
12adba34 RS |
1178 | scan_newline (tlbufpos, tlbufpos_byte, BEGV, BEGV_BYTE, -1, 1); |
1179 | ||
1180 | val = *compute_motion (PT, 0, | |
1c9241f5 KH |
1181 | XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0, |
1182 | 0, | |
1183 | tlbufpos, | |
1184 | 1 << (BITS_PER_SHORT - 1), | |
1185 | 1 << (BITS_PER_SHORT - 1), | |
1186 | window_internal_width (w) - 1, | |
1187 | XINT (w->hscroll), 0, w); | |
12adba34 | 1188 | SET_PT_BOTH (opoint, opoint_byte); |
1c9241f5 KH |
1189 | if (val.hpos != this_line_start_hpos) |
1190 | goto cancel; | |
1191 | ||
a2889657 JB |
1192 | cursor_vpos = -1; |
1193 | overlay_arrow_seen = 0; | |
ca26e1c8 | 1194 | zv_strings_seen = 0; |
12adba34 RS |
1195 | display_text_line (w, tlbufpos, tlbufpos_byte, |
1196 | this_line_vpos, this_line_start_hpos, | |
1197 | pos_tab_offset (w, tlbufpos, tlbufpos_byte), 0); | |
a2889657 JB |
1198 | /* If line contains point, is not continued, |
1199 | and ends at same distance from eob as before, we win */ | |
1200 | if (cursor_vpos >= 0 && this_line_bufpos | |
1201 | && this_line_endpos == tlendpos) | |
1202 | { | |
0d231165 RS |
1203 | /* If this is not the window's last line, |
1204 | we must adjust the charstarts of the lines below. */ | |
1205 | if (this_line_vpos + 1 | |
1206 | < XFASTINT (w->top) + window_internal_height (w)) | |
85bcef6c | 1207 | { |
73f194f1 | 1208 | int left = WINDOW_LEFT_MARGIN (w); |
85bcef6c RS |
1209 | int *charstart_next_line |
1210 | = FRAME_CURRENT_GLYPHS (XFRAME (WINDOW_FRAME (w)))->charstarts[this_line_vpos + 1]; | |
85bcef6c RS |
1211 | int adjust; |
1212 | ||
1213 | if (Z - tlendpos == ZV) | |
1214 | /* This line ends at end of (accessible part of) buffer. | |
1215 | There is no newline to count. */ | |
1216 | adjust = Z - tlendpos - charstart_next_line[left]; | |
1217 | else | |
1218 | /* This line ends in a newline. | |
1219 | Must take account of the newline and the rest of the | |
1220 | text that follows. */ | |
1221 | adjust = Z - tlendpos + 1 - charstart_next_line[left]; | |
1222 | ||
1223 | adjust_window_charstarts (w, this_line_vpos, adjust); | |
1224 | } | |
46db8486 | 1225 | |
73f194f1 | 1226 | if (!WINDOW_FULL_WIDTH_P (w)) |
a2889657 JB |
1227 | preserve_other_columns (w); |
1228 | goto update; | |
1229 | } | |
1230 | else | |
1231 | goto cancel; | |
1232 | } | |
b6f0fe04 RS |
1233 | else if (PT == XFASTINT (w->last_point) |
1234 | /* Make sure the cursor was last displayed | |
1235 | in this window. Otherwise we have to reposition it. */ | |
1236 | && XINT (w->top) <= FRAME_CURSOR_Y (selected_frame) | |
1237 | && (XINT (w->top) + XINT (w->height) | |
1238 | > FRAME_CURSOR_Y (selected_frame))) | |
a2889657 JB |
1239 | { |
1240 | if (!must_finish) | |
1241 | { | |
1242 | do_pending_window_change (); | |
1243 | return; | |
1244 | } | |
1245 | goto update; | |
1246 | } | |
8b51f1e3 KH |
1247 | /* If highlighting the region, or if the cursor is in the echo area, |
1248 | then we can't just move the cursor. */ | |
bd66d1ba RS |
1249 | else if (! (!NILP (Vtransient_mark_mode) |
1250 | && !NILP (current_buffer->mark_active)) | |
293a54ce RS |
1251 | && (w == XWINDOW (current_buffer->last_selected_window) |
1252 | || highlight_nonselected_windows) | |
8b51f1e3 KH |
1253 | && NILP (w->region_showing) |
1254 | && !cursor_in_echo_area) | |
a2889657 JB |
1255 | { |
1256 | pos = *compute_motion (tlbufpos, 0, | |
1257 | XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0, | |
ca26e1c8 | 1258 | 0, |
68be917d | 1259 | PT, 2, - (1 << (BITS_PER_SHORT - 1)), |
b1d1124b | 1260 | window_internal_width (w) - 1, |
de3e8b15 | 1261 | XINT (w->hscroll), |
12adba34 RS |
1262 | pos_tab_offset (w, tlbufpos, tlbufpos_byte), |
1263 | w); | |
a2889657 JB |
1264 | if (pos.vpos < 1) |
1265 | { | |
210e752f | 1266 | int width = window_internal_width (w) - 1; |
44fa5b1e | 1267 | FRAME_CURSOR_X (selected_frame) |
73f194f1 | 1268 | = WINDOW_LEFT_MARGIN (w) + minmax (0, pos.hpos, width); |
44fa5b1e | 1269 | FRAME_CURSOR_Y (selected_frame) = this_line_vpos; |
a2889657 JB |
1270 | goto update; |
1271 | } | |
1272 | else | |
1273 | goto cancel; | |
1274 | } | |
1275 | cancel: | |
1276 | /* Text changed drastically or point moved off of line */ | |
44fa5b1e | 1277 | cancel_line (this_line_vpos, selected_frame); |
a2889657 JB |
1278 | } |
1279 | ||
1280 | this_line_bufpos = 0; | |
1281 | all_windows |= buffer_shared > 1; | |
1282 | ||
463f6b91 RS |
1283 | clear_face_cache_count++; |
1284 | ||
a2889657 JB |
1285 | if (all_windows) |
1286 | { | |
35f56f96 | 1287 | Lisp_Object tail, frame; |
a2889657 | 1288 | |
87485d6f | 1289 | #ifdef HAVE_FACES |
463f6b91 RS |
1290 | /* Clear the face cache, only when we do a full redisplay |
1291 | and not too often either. */ | |
1292 | if (clear_face_cache_count > 1000) | |
1293 | { | |
1294 | clear_face_cache (); | |
1295 | clear_face_cache_count = 0; | |
1296 | } | |
31b24551 JB |
1297 | #endif |
1298 | ||
a2889657 | 1299 | /* Recompute # windows showing selected buffer. |
8de2d90b | 1300 | This will be incremented each time such a window is displayed. */ |
a2889657 JB |
1301 | buffer_shared = 0; |
1302 | ||
35f56f96 | 1303 | FOR_EACH_FRAME (tail, frame) |
30c566e4 | 1304 | { |
35f56f96 | 1305 | FRAME_PTR f = XFRAME (frame); |
fd8ff63d | 1306 | if (FRAME_WINDOW_P (f) || f == selected_frame) |
9769686d | 1307 | { |
35f56f96 | 1308 | |
9769686d RS |
1309 | /* Mark all the scroll bars to be removed; we'll redeem the ones |
1310 | we want when we redisplay their windows. */ | |
1311 | if (condemn_scroll_bars_hook) | |
1312 | (*condemn_scroll_bars_hook) (f); | |
30c566e4 | 1313 | |
f21ef775 | 1314 | if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
89819bdd | 1315 | redisplay_windows (FRAME_ROOT_WINDOW (f), preserve_echo_area); |
30c566e4 | 1316 | |
9769686d RS |
1317 | /* Any scroll bars which redisplay_windows should have nuked |
1318 | should now go away. */ | |
1319 | if (judge_scroll_bars_hook) | |
1320 | (*judge_scroll_bars_hook) (f); | |
1321 | } | |
30c566e4 | 1322 | } |
a2889657 | 1323 | } |
f21ef775 | 1324 | else if (FRAME_VISIBLE_P (selected_frame) && !FRAME_OBSCURED_P (selected_frame)) |
a2889657 | 1325 | { |
e9874cee | 1326 | redisplay_window (selected_window, 1, preserve_echo_area); |
73f194f1 | 1327 | if (!WINDOW_FULL_WIDTH_P (w)) |
a2889657 JB |
1328 | preserve_other_columns (w); |
1329 | } | |
1330 | ||
1331 | update: | |
1332 | /* Prevent various kinds of signals during display update. | |
1333 | stdio is not robust about handling signals, | |
1334 | which can cause an apparent I/O error. */ | |
1335 | if (interrupt_input) | |
1336 | unrequest_sigio (); | |
1337 | stop_polling (); | |
1338 | ||
a2889657 JB |
1339 | if (all_windows) |
1340 | { | |
1341 | Lisp_Object tail; | |
1342 | ||
1343 | pause = 0; | |
1344 | ||
44fa5b1e | 1345 | for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr) |
a2889657 | 1346 | { |
44fa5b1e | 1347 | FRAME_PTR f; |
a2889657 | 1348 | |
e24c997d | 1349 | if (!FRAMEP (XCONS (tail)->car)) |
a2889657 JB |
1350 | continue; |
1351 | ||
44fa5b1e | 1352 | f = XFRAME (XCONS (tail)->car); |
1af9f229 | 1353 | |
fd8ff63d | 1354 | if ((FRAME_WINDOW_P (f) || f == selected_frame) |
f21ef775 | 1355 | && FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
a2889657 | 1356 | { |
44fa5b1e | 1357 | pause |= update_frame (f, 0, 0); |
a2889657 | 1358 | if (!pause) |
efc63ef0 RS |
1359 | { |
1360 | mark_window_display_accurate (f->root_window, 1); | |
1361 | if (frame_up_to_date_hook != 0) | |
1362 | (*frame_up_to_date_hook) (f); | |
1363 | } | |
a2889657 JB |
1364 | } |
1365 | } | |
1366 | } | |
1367 | else | |
6e8290aa | 1368 | { |
f21ef775 | 1369 | if (FRAME_VISIBLE_P (selected_frame) && !FRAME_OBSCURED_P (selected_frame)) |
44fa5b1e | 1370 | pause = update_frame (selected_frame, 0, 0); |
4d641a15 KH |
1371 | else |
1372 | pause = 0; | |
d724d989 | 1373 | |
8de2d90b | 1374 | /* We may have called echo_area_display at the top of this |
44fa5b1e JB |
1375 | function. If the echo area is on another frame, that may |
1376 | have put text on a frame other than the selected one, so the | |
1377 | above call to update_frame would not have caught it. Catch | |
8de2d90b JB |
1378 | it here. */ |
1379 | { | |
84faf44c RS |
1380 | Lisp_Object mini_window; |
1381 | FRAME_PTR mini_frame; | |
1382 | ||
1383 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
1384 | mini_frame = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
8de2d90b | 1385 | |
fd8ff63d | 1386 | if (mini_frame != selected_frame && FRAME_WINDOW_P (mini_frame)) |
44fa5b1e | 1387 | pause |= update_frame (mini_frame, 0, 0); |
8de2d90b | 1388 | } |
6e8290aa | 1389 | } |
a2889657 | 1390 | |
44fa5b1e | 1391 | /* If frame does not match, prevent doing single-line-update next time. |
a2889657 JB |
1392 | Also, don't forget to check every line to update the arrow. */ |
1393 | if (pause) | |
1394 | { | |
1395 | this_line_bufpos = 0; | |
265a9e55 | 1396 | if (!NILP (last_arrow_position)) |
a2889657 JB |
1397 | { |
1398 | last_arrow_position = Qt; | |
1399 | last_arrow_string = Qt; | |
1400 | } | |
44fa5b1e | 1401 | /* If we pause after scrolling, some lines in current_frame |
a2889657 JB |
1402 | may be null, so preserve_other_columns won't be able to |
1403 | preserve all the vertical-bar separators. So, avoid using it | |
1404 | in that case. */ | |
73f194f1 | 1405 | if (!WINDOW_FULL_WIDTH_P (w)) |
a2889657 JB |
1406 | update_mode_lines = 1; |
1407 | } | |
1408 | ||
44fa5b1e | 1409 | /* Now text on frame agrees with windows, so |
a2889657 JB |
1410 | put info into the windows for partial redisplay to follow */ |
1411 | ||
1412 | if (!pause) | |
1413 | { | |
1414 | register struct buffer *b = XBUFFER (w->buffer); | |
1415 | ||
1416 | blank_end_of_window = 0; | |
a2889657 | 1417 | unchanged_modified = BUF_MODIFF (b); |
8850a573 | 1418 | overlay_unchanged_modified = BUF_OVERLAY_MODIFF (b); |
a2889657 JB |
1419 | beg_unchanged = BUF_GPT (b) - BUF_BEG (b); |
1420 | end_unchanged = BUF_Z (b) - BUF_GPT (b); | |
1421 | ||
c2213350 KH |
1422 | XSETFASTINT (w->last_point, BUF_PT (b)); |
1423 | XSETFASTINT (w->last_point_x, FRAME_CURSOR_X (selected_frame)); | |
1424 | XSETFASTINT (w->last_point_y, FRAME_CURSOR_Y (selected_frame)); | |
a2889657 JB |
1425 | |
1426 | if (all_windows) | |
11e82b76 | 1427 | mark_window_display_accurate (FRAME_ROOT_WINDOW (selected_frame), 1); |
a2889657 JB |
1428 | else |
1429 | { | |
28995e67 | 1430 | b->clip_changed = 0; |
a2889657 | 1431 | w->update_mode_line = Qnil; |
c2213350 | 1432 | XSETFASTINT (w->last_modified, BUF_MODIFF (b)); |
8850a573 | 1433 | XSETFASTINT (w->last_overlay_modified, BUF_OVERLAY_MODIFF (b)); |
538f13d4 RS |
1434 | w->last_had_star |
1435 | = (BUF_MODIFF (XBUFFER (w->buffer)) > BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
1436 | ? Qt : Qnil); | |
3ee4159a RS |
1437 | |
1438 | /* Record if we are showing a region, so can make sure to | |
1439 | update it fully at next redisplay. */ | |
1440 | w->region_showing = (!NILP (Vtransient_mark_mode) | |
293a54ce RS |
1441 | && (w == XWINDOW (current_buffer->last_selected_window) |
1442 | || highlight_nonselected_windows) | |
3ee4159a RS |
1443 | && !NILP (XBUFFER (w->buffer)->mark_active) |
1444 | ? Fmarker_position (XBUFFER (w->buffer)->mark) | |
1445 | : Qnil); | |
1446 | ||
d2f84654 | 1447 | w->window_end_valid = w->buffer; |
d45de95b | 1448 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 | 1449 | last_arrow_string = Voverlay_arrow_string; |
0d231165 RS |
1450 | if (do_verify_charstarts) |
1451 | verify_charstarts (w); | |
efc63ef0 RS |
1452 | if (frame_up_to_date_hook != 0) |
1453 | (*frame_up_to_date_hook) (selected_frame); | |
a2889657 JB |
1454 | } |
1455 | update_mode_lines = 0; | |
1456 | windows_or_buffers_changed = 0; | |
1457 | } | |
1458 | ||
1459 | /* Start SIGIO interrupts coming again. | |
1460 | Having them off during the code above | |
1461 | makes it less likely one will discard output, | |
1462 | but not impossible, since there might be stuff | |
1463 | in the system buffer here. | |
1464 | But it is much hairier to try to do anything about that. */ | |
1465 | ||
1466 | if (interrupt_input) | |
1467 | request_sigio (); | |
1468 | start_polling (); | |
1469 | ||
11c52c4f RS |
1470 | /* If something has become visible now which was not before, |
1471 | redisplay again, so that we get them. */ | |
1472 | if (!pause) | |
1473 | { | |
1474 | Lisp_Object tail, frame; | |
1475 | int new_count = 0; | |
1476 | ||
1477 | FOR_EACH_FRAME (tail, frame) | |
1478 | { | |
1479 | int this_is_visible = 0; | |
8e83f802 RS |
1480 | |
1481 | if (XFRAME (frame)->visible) | |
1482 | this_is_visible = 1; | |
1483 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
1484 | if (XFRAME (frame)->visible) | |
1485 | this_is_visible = 1; | |
11c52c4f RS |
1486 | |
1487 | if (this_is_visible) | |
1488 | new_count++; | |
1489 | } | |
1490 | ||
89819bdd | 1491 | if (new_count != number_of_visible_frames) |
11c52c4f RS |
1492 | windows_or_buffers_changed++; |
1493 | } | |
1494 | ||
44fa5b1e | 1495 | /* Change frame size now if a change is pending. */ |
a2889657 | 1496 | do_pending_window_change (); |
d8e242fd | 1497 | |
8b32d885 RS |
1498 | /* If we just did a pending size change, or have additional |
1499 | visible frames, redisplay again. */ | |
3c8c72e0 | 1500 | if (windows_or_buffers_changed && !pause) |
8b32d885 | 1501 | goto retry; |
a2889657 JB |
1502 | } |
1503 | ||
1504 | /* Redisplay, but leave alone any recent echo area message | |
1505 | unless another message has been requested in its place. | |
1506 | ||
1507 | This is useful in situations where you need to redisplay but no | |
1508 | user action has occurred, making it inappropriate for the message | |
1509 | area to be cleared. See tracking_off and | |
1510 | wait_reading_process_input for examples of these situations. */ | |
1511 | ||
8991bb31 | 1512 | void |
a2889657 JB |
1513 | redisplay_preserve_echo_area () |
1514 | { | |
1515 | if (echo_area_glyphs == 0 && previous_echo_glyphs != 0) | |
1516 | { | |
1517 | echo_area_glyphs = previous_echo_glyphs; | |
e9874cee | 1518 | redisplay_internal (1); |
a2889657 JB |
1519 | echo_area_glyphs = 0; |
1520 | } | |
1521 | else | |
e9874cee | 1522 | redisplay_internal (1); |
a2889657 JB |
1523 | } |
1524 | ||
1525 | void | |
1526 | mark_window_display_accurate (window, flag) | |
1527 | Lisp_Object window; | |
1528 | int flag; | |
1529 | { | |
1530 | register struct window *w; | |
1531 | ||
265a9e55 | 1532 | for (;!NILP (window); window = w->next) |
a2889657 | 1533 | { |
e24c997d | 1534 | if (!WINDOWP (window)) abort (); |
a2889657 JB |
1535 | w = XWINDOW (window); |
1536 | ||
265a9e55 | 1537 | if (!NILP (w->buffer)) |
bd66d1ba | 1538 | { |
c2213350 KH |
1539 | XSETFASTINT (w->last_modified, |
1540 | !flag ? 0 : BUF_MODIFF (XBUFFER (w->buffer))); | |
8850a573 RS |
1541 | XSETFASTINT (w->last_overlay_modified, |
1542 | !flag ? 0 : BUF_OVERLAY_MODIFF (XBUFFER (w->buffer))); | |
538f13d4 RS |
1543 | w->last_had_star |
1544 | = (BUF_MODIFF (XBUFFER (w->buffer)) > BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
1545 | ? Qt : Qnil); | |
bd66d1ba RS |
1546 | |
1547 | /* Record if we are showing a region, so can make sure to | |
1548 | update it fully at next redisplay. */ | |
1549 | w->region_showing = (!NILP (Vtransient_mark_mode) | |
293a54ce RS |
1550 | && (w == XWINDOW (current_buffer->last_selected_window) |
1551 | || highlight_nonselected_windows) | |
bd66d1ba RS |
1552 | && !NILP (XBUFFER (w->buffer)->mark_active) |
1553 | ? Fmarker_position (XBUFFER (w->buffer)->mark) | |
1554 | : Qnil); | |
1555 | } | |
1556 | ||
d2f84654 | 1557 | w->window_end_valid = w->buffer; |
a2889657 | 1558 | w->update_mode_line = Qnil; |
051e7076 | 1559 | if (!NILP (w->buffer) && flag) |
28995e67 | 1560 | XBUFFER (w->buffer)->clip_changed = 0; |
a2889657 | 1561 | |
265a9e55 | 1562 | if (!NILP (w->vchild)) |
a2889657 | 1563 | mark_window_display_accurate (w->vchild, flag); |
265a9e55 | 1564 | if (!NILP (w->hchild)) |
a2889657 JB |
1565 | mark_window_display_accurate (w->hchild, flag); |
1566 | } | |
1567 | ||
1568 | if (flag) | |
1569 | { | |
d45de95b | 1570 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 JB |
1571 | last_arrow_string = Voverlay_arrow_string; |
1572 | } | |
1573 | else | |
1574 | { | |
1575 | /* t is unequal to any useful value of Voverlay_arrow_... */ | |
1576 | last_arrow_position = Qt; | |
1577 | last_arrow_string = Qt; | |
1578 | } | |
1579 | } | |
1580 | \f | |
ecf7de9b | 1581 | /* Update the menu bar item list for frame F. |
90adcf20 | 1582 | This has to be done before we start to fill in any display lines, |
a2725ab2 RS |
1583 | because it can call eval. |
1584 | ||
1585 | If SAVE_MATCH_DATA is 1, we must save and restore it here. */ | |
90adcf20 RS |
1586 | |
1587 | static void | |
a2725ab2 | 1588 | update_menu_bar (f, save_match_data) |
ecf7de9b | 1589 | FRAME_PTR f; |
a2725ab2 | 1590 | int save_match_data; |
90adcf20 | 1591 | { |
90adcf20 | 1592 | struct buffer *old = current_buffer; |
ecf7de9b RS |
1593 | Lisp_Object window; |
1594 | register struct window *w; | |
a2725ab2 | 1595 | |
ecf7de9b RS |
1596 | window = FRAME_SELECTED_WINDOW (f); |
1597 | w = XWINDOW (window); | |
90adcf20 RS |
1598 | |
1599 | if (update_mode_lines) | |
1600 | w->update_mode_line = Qt; | |
1601 | ||
d1e74921 | 1602 | if (FRAME_WINDOW_P (f) |
d3413a53 | 1603 | ? |
dc937613 | 1604 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) |
cf074754 | 1605 | FRAME_EXTERNAL_MENU_BAR (f) |
78614721 | 1606 | #else |
cf074754 | 1607 | FRAME_MENU_BAR_LINES (f) > 0 |
78614721 | 1608 | #endif |
d3413a53 | 1609 | : FRAME_MENU_BAR_LINES (f) > 0) |
90adcf20 RS |
1610 | { |
1611 | /* If the user has switched buffers or windows, we need to | |
1612 | recompute to reflect the new bindings. But we'll | |
1613 | recompute when update_mode_lines is set too; that means | |
1614 | that people can use force-mode-line-update to request | |
1615 | that the menu bar be recomputed. The adverse effect on | |
1616 | the rest of the redisplay algorithm is about the same as | |
1617 | windows_or_buffers_changed anyway. */ | |
1618 | if (windows_or_buffers_changed | |
cf074754 | 1619 | || !NILP (w->update_mode_line) |
538f13d4 RS |
1620 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) |
1621 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
1622 | != !NILP (w->last_had_star)) | |
94bb7f9b KH |
1623 | || ((!NILP (Vtransient_mark_mode) |
1624 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
1625 | != !NILP (w->region_showing))) | |
90adcf20 RS |
1626 | { |
1627 | struct buffer *prev = current_buffer; | |
a2725ab2 RS |
1628 | int count = specpdl_ptr - specpdl; |
1629 | ||
399164b4 | 1630 | set_buffer_internal_1 (XBUFFER (w->buffer)); |
eac4251c | 1631 | if (save_match_data) |
9cbab4ff | 1632 | record_unwind_protect (Fstore_match_data, Fmatch_data (Qnil, Qnil)); |
399164b4 | 1633 | if (NILP (Voverriding_local_map_menu_flag)) |
d46fb96a KH |
1634 | { |
1635 | specbind (Qoverriding_terminal_local_map, Qnil); | |
1636 | specbind (Qoverriding_local_map, Qnil); | |
1637 | } | |
a2725ab2 | 1638 | |
34acc8e6 KH |
1639 | /* Run the Lucid hook. */ |
1640 | call1 (Vrun_hooks, Qactivate_menubar_hook); | |
1641 | /* If it has changed current-menubar from previous value, | |
1642 | really recompute the menubar from the value. */ | |
1643 | if (! NILP (Vlucid_menu_bar_dirty_flag)) | |
1644 | call0 (Qrecompute_lucid_menubar); | |
e02500d4 | 1645 | safe_run_hooks (Qmenu_bar_update_hook); |
8351baf2 | 1646 | FRAME_MENU_BAR_ITEMS (f) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f)); |
538f13d4 | 1647 | /* Redisplay the menu bar in case we changed it. */ |
8f3343d0 | 1648 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) |
d1e74921 | 1649 | if (FRAME_WINDOW_P (f)) |
d3413a53 | 1650 | set_frame_menubar (f, 0, 0); |
538f13d4 RS |
1651 | else |
1652 | /* On a terminal screen, the menu bar is an ordinary screen | |
1653 | line, and this makes it get updated. */ | |
1654 | w->update_mode_line = Qt; | |
1655 | #else /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
1656 | /* In the non-toolkit version, the menu bar is an ordinary screen | |
1657 | line, and this makes it get updated. */ | |
1658 | w->update_mode_line = Qt; | |
1659 | #endif /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
a2725ab2 RS |
1660 | |
1661 | unbind_to (count, Qnil); | |
399164b4 | 1662 | set_buffer_internal_1 (prev); |
90adcf20 RS |
1663 | } |
1664 | } | |
1665 | } | |
1666 | \f | |
a2889657 JB |
1667 | int do_id = 1; |
1668 | ||
90adcf20 RS |
1669 | /* Redisplay WINDOW and its subwindows and siblings. */ |
1670 | ||
a2889657 | 1671 | static void |
e9874cee | 1672 | redisplay_windows (window, preserve_echo_area) |
a2889657 | 1673 | Lisp_Object window; |
e9874cee | 1674 | int preserve_echo_area; |
a2889657 | 1675 | { |
265a9e55 | 1676 | for (; !NILP (window); window = XWINDOW (window)->next) |
e9874cee | 1677 | redisplay_window (window, 0, preserve_echo_area); |
a2889657 JB |
1678 | } |
1679 | ||
1f1ff51d KH |
1680 | /* Return value in display table DP (Lisp_Char_Table *) for character |
1681 | C. Since a display table doesn't have any parent, we don't have to | |
1682 | follow parent. Do not call this function directly but use the | |
1683 | macro DISP_CHAR_VECTOR. */ | |
1684 | Lisp_Object | |
1685 | disp_char_vector (dp, c) | |
1686 | struct Lisp_Char_Table *dp; | |
1687 | int c; | |
1688 | { | |
1689 | int code[4], i; | |
1690 | Lisp_Object val; | |
1691 | ||
1692 | if (SINGLE_BYTE_CHAR_P (c)) return (dp->contents[c]); | |
1693 | ||
1694 | SPLIT_NON_ASCII_CHAR (c, code[0], code[1], code[2]); | |
1695 | if (code[0] != CHARSET_COMPOSITION) | |
1696 | { | |
1697 | if (code[1] < 32) code[1] = -1; | |
1698 | else if (code[2] < 32) code[2] = -1; | |
1699 | } | |
1700 | /* Here, the possible range of CODE[0] (== charset ID) is | |
1701 | 128..MAX_CHARSET. Since the top level char table contains data | |
1702 | for multibyte characters after 256th element, we must increment | |
1703 | CODE[0] by 128 to get a correct index. */ | |
1704 | code[0] += 128; | |
1705 | code[3] = -1; /* anchor */ | |
1706 | ||
1707 | for (i = 0; code[i] >= 0; i++, dp = XCHAR_TABLE (val)) | |
1708 | { | |
1709 | val = dp->contents[code[i]]; | |
1710 | if (!SUB_CHAR_TABLE_P (val)) | |
1711 | return (NILP (val) ? dp->defalt : val); | |
1712 | } | |
1713 | /* Here, VAL is a sub char table. We return the default value of it. */ | |
1714 | return (dp->defalt); | |
1715 | } | |
1716 | ||
90adcf20 RS |
1717 | /* Redisplay window WINDOW and its subwindows. */ |
1718 | ||
a2889657 | 1719 | static void |
e9874cee | 1720 | redisplay_window (window, just_this_one, preserve_echo_area) |
a2889657 | 1721 | Lisp_Object window; |
e9874cee | 1722 | int just_this_one, preserve_echo_area; |
a2889657 JB |
1723 | { |
1724 | register struct window *w = XWINDOW (window); | |
30c566e4 | 1725 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
a2889657 | 1726 | int height; |
12adba34 RS |
1727 | int lpoint = PT; |
1728 | int lpoint_byte = PT_BYTE; | |
a2889657 | 1729 | struct buffer *old = current_buffer; |
b1d1124b | 1730 | register int width = window_internal_width (w) - 1; |
12adba34 | 1731 | register int startp, startp_byte; |
a2889657 JB |
1732 | register int hscroll = XINT (w->hscroll); |
1733 | struct position pos; | |
ae3b1442 | 1734 | int opoint = PT; |
12adba34 | 1735 | int opoint_byte = PT_BYTE; |
a2889657 | 1736 | int tem; |
e481f960 | 1737 | int update_mode_line; |
f908610f | 1738 | struct Lisp_Char_Table *dp = window_display_table (w); |
a2889657 | 1739 | |
12adba34 RS |
1740 | if (Z == Z_BYTE && lpoint != lpoint_byte) |
1741 | abort (); | |
1742 | if (lpoint_byte < lpoint) | |
1743 | abort (); | |
1744 | ||
44fa5b1e | 1745 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
a2889657 JB |
1746 | |
1747 | /* If this is a combination window, do its children; that's all. */ | |
1748 | ||
265a9e55 | 1749 | if (!NILP (w->vchild)) |
a2889657 | 1750 | { |
f9c467a3 | 1751 | redisplay_windows (w->vchild, preserve_echo_area); |
a2889657 JB |
1752 | return; |
1753 | } | |
265a9e55 | 1754 | if (!NILP (w->hchild)) |
a2889657 | 1755 | { |
f9c467a3 | 1756 | redisplay_windows (w->hchild, preserve_echo_area); |
a2889657 JB |
1757 | return; |
1758 | } | |
265a9e55 | 1759 | if (NILP (w->buffer)) |
a2889657 | 1760 | abort (); |
8de2d90b JB |
1761 | |
1762 | height = window_internal_height (w); | |
4d641a15 | 1763 | update_mode_line = (!NILP (w->update_mode_line) || update_mode_lines); |
73af359d RS |
1764 | if (XBUFFER (w->buffer)->clip_changed) |
1765 | update_mode_line = 1; | |
8de2d90b JB |
1766 | |
1767 | if (MINI_WINDOW_P (w)) | |
1768 | { | |
73af359d RS |
1769 | if (w == XWINDOW (echo_area_window) && echo_area_glyphs) |
1770 | /* We've already displayed the echo area glyphs in this window. */ | |
1771 | goto finish_scroll_bars; | |
1772 | else if (w != XWINDOW (minibuf_window)) | |
8de2d90b | 1773 | { |
73af359d RS |
1774 | /* This is a minibuffer, but it's not the currently active one, |
1775 | so clear it. */ | |
1776 | int vpos = XFASTINT (w->top); | |
8de2d90b JB |
1777 | int i; |
1778 | ||
1779 | for (i = 0; i < height; i++) | |
1780 | { | |
44fa5b1e | 1781 | get_display_line (f, vpos + i, 0); |
73f194f1 RS |
1782 | display_string (w, vpos + i, "", 0, |
1783 | FRAME_LEFT_SCROLL_BAR_WIDTH (f), | |
a3788d53 | 1784 | 0, 1, 0, width, 0); |
8de2d90b JB |
1785 | } |
1786 | ||
88f22aff | 1787 | goto finish_scroll_bars; |
8de2d90b JB |
1788 | } |
1789 | } | |
a2889657 | 1790 | |
a2889657 JB |
1791 | /* Otherwise set up data on this window; select its buffer and point value */ |
1792 | ||
e481f960 | 1793 | if (update_mode_line) |
f72df6ac | 1794 | set_buffer_internal_1 (XBUFFER (w->buffer)); |
e481f960 RS |
1795 | else |
1796 | set_buffer_temp (XBUFFER (w->buffer)); | |
1797 | ||
ae3b1442 | 1798 | opoint = PT; |
12adba34 RS |
1799 | opoint_byte = PT_BYTE; |
1800 | ||
1801 | if (Z == Z_BYTE && opoint != opoint_byte) | |
1802 | abort (); | |
1803 | if (opoint_byte < opoint) | |
1804 | abort (); | |
a2889657 | 1805 | |
28995e67 RS |
1806 | /* If %c is in mode line, update it if needed. */ |
1807 | if (!NILP (w->column_number_displayed) | |
1808 | /* This alternative quickly identifies a common case | |
1809 | where no change is needed. */ | |
1810 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
1811 | && XFASTINT (w->last_modified) >= MODIFF |
1812 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
1813 | && XFASTINT (w->column_number_displayed) != current_column ()) |
1814 | update_mode_line = 1; | |
1815 | ||
42640f83 RS |
1816 | /* Count number of windows showing the selected buffer. |
1817 | An indirect buffer counts as its base buffer. */ | |
a2889657 | 1818 | |
42640f83 RS |
1819 | if (!just_this_one) |
1820 | { | |
1821 | struct buffer *current_base, *window_base; | |
1822 | current_base = current_buffer; | |
1823 | window_base = XBUFFER (XWINDOW (selected_window)->buffer); | |
1824 | if (current_base->base_buffer) | |
1825 | current_base = current_base->base_buffer; | |
1826 | if (window_base->base_buffer) | |
1827 | window_base = window_base->base_buffer; | |
1828 | if (current_base == window_base) | |
1829 | buffer_shared++; | |
1830 | } | |
a2889657 JB |
1831 | |
1832 | /* POINT refers normally to the selected window. | |
1833 | For any other window, set up appropriate value. */ | |
1834 | ||
1835 | if (!EQ (window, selected_window)) | |
1836 | { | |
12adba34 RS |
1837 | int new_pt = XMARKER (w->pointm)->charpos; |
1838 | int new_pt_byte = marker_byte_position (w->pointm); | |
f67a0f51 | 1839 | if (new_pt < BEGV) |
a2889657 | 1840 | { |
f67a0f51 | 1841 | new_pt = BEGV; |
12adba34 RS |
1842 | new_pt_byte = BEGV_BYTE; |
1843 | set_marker_both (w->pointm, Qnil, BEGV, BEGV_BYTE); | |
a2889657 | 1844 | } |
f67a0f51 | 1845 | else if (new_pt > (ZV - 1)) |
a2889657 | 1846 | { |
f67a0f51 | 1847 | new_pt = ZV; |
12adba34 RS |
1848 | new_pt_byte = ZV_BYTE; |
1849 | set_marker_both (w->pointm, Qnil, ZV, ZV_BYTE); | |
a2889657 | 1850 | } |
f67a0f51 | 1851 | /* We don't use SET_PT so that the point-motion hooks don't run. */ |
12adba34 | 1852 | TEMP_SET_PT_BOTH (new_pt, new_pt_byte); |
a2889657 JB |
1853 | } |
1854 | ||
f4faa47c JB |
1855 | /* If any of the character widths specified in the display table |
1856 | have changed, invalidate the width run cache. It's true that this | |
1857 | may be a bit late to catch such changes, but the rest of | |
1858 | redisplay goes (non-fatally) haywire when the display table is | |
1859 | changed, so why should we worry about doing any better? */ | |
1860 | if (current_buffer->width_run_cache) | |
1861 | { | |
f908610f | 1862 | struct Lisp_Char_Table *disptab = buffer_display_table (); |
f4faa47c JB |
1863 | |
1864 | if (! disptab_matches_widthtab (disptab, | |
1865 | XVECTOR (current_buffer->width_table))) | |
1866 | { | |
1867 | invalidate_region_cache (current_buffer, | |
1868 | current_buffer->width_run_cache, | |
1869 | BEG, Z); | |
1870 | recompute_width_table (current_buffer, disptab); | |
1871 | } | |
1872 | } | |
1873 | ||
a2889657 | 1874 | /* If window-start is screwed up, choose a new one. */ |
a2889657 JB |
1875 | if (XMARKER (w->start)->buffer != current_buffer) |
1876 | goto recenter; | |
1877 | ||
1878 | startp = marker_position (w->start); | |
12adba34 | 1879 | startp_byte = marker_byte_position (w->start); |
a2889657 | 1880 | |
cf0df6ab RS |
1881 | /* If someone specified a new starting point but did not insist, |
1882 | check whether it can be used. */ | |
1883 | if (!NILP (w->optional_new_start)) | |
1884 | { | |
1885 | w->optional_new_start = Qnil; | |
1886 | /* Check whether this start pos is usable given where point is. */ | |
1887 | ||
1888 | pos = *compute_motion (startp, 0, | |
1889 | (((EQ (window, minibuf_window) | |
1890 | && startp == BEG) | |
1891 | ? minibuf_prompt_width : 0) | |
1892 | + (hscroll ? 1 - hscroll : 0)), | |
1893 | 0, | |
1c9241f5 KH |
1894 | PT, height, |
1895 | /* BUG FIX: See the comment of | |
1896 | Fpos_visible_in_window_p (window.c). */ | |
1897 | - (1 << (BITS_PER_SHORT - 1)), | |
12adba34 RS |
1898 | width, hscroll, |
1899 | pos_tab_offset (w, startp, startp_byte), w); | |
cf0df6ab RS |
1900 | /* If PT does fit on the screen, we will use this start pos, |
1901 | so do so by setting force_start. */ | |
1902 | if (pos.bufpos == PT) | |
1903 | w->force_start = Qt; | |
1904 | } | |
1905 | ||
8de2d90b | 1906 | /* Handle case where place to start displaying has been specified, |
aa6d10fa | 1907 | unless the specified location is outside the accessible range. */ |
265a9e55 | 1908 | if (!NILP (w->force_start)) |
a2889657 | 1909 | { |
e63574d7 | 1910 | w->force_start = Qnil; |
aa6d10fa RS |
1911 | /* Forget any recorded base line for line number display. */ |
1912 | w->base_line_number = Qnil; | |
75c43375 RS |
1913 | /* Redisplay the mode line. Select the buffer properly for that. |
1914 | Also, run the hook window-scroll-functions | |
1915 | because we have scrolled. */ | |
e63574d7 RS |
1916 | /* Note, we do this after clearing force_start because |
1917 | if there's an error, it is better to forget about force_start | |
1918 | than to get into an infinite loop calling the hook functions | |
1919 | and having them get more errors. */ | |
75c43375 RS |
1920 | if (!update_mode_line |
1921 | || ! NILP (Vwindow_scroll_functions)) | |
e481f960 | 1922 | { |
75c43375 RS |
1923 | Lisp_Object temp[3]; |
1924 | ||
e481f960 | 1925 | set_buffer_temp (old); |
f72df6ac | 1926 | set_buffer_internal_1 (XBUFFER (w->buffer)); |
e481f960 RS |
1927 | update_mode_line = 1; |
1928 | w->update_mode_line = Qt; | |
75c43375 | 1929 | if (! NILP (Vwindow_scroll_functions)) |
3dcd07e3 KH |
1930 | { |
1931 | run_hook_with_args_2 (Qwindow_scroll_functions, window, | |
1932 | make_number (startp)); | |
1933 | startp = marker_position (w->start); | |
1934 | } | |
e481f960 | 1935 | } |
c2213350 | 1936 | XSETFASTINT (w->last_modified, 0); |
8850a573 | 1937 | XSETFASTINT (w->last_overlay_modified, 0); |
12adba34 RS |
1938 | if (startp < BEGV) startp = BEGV, startp_byte = BEGV_BYTE; |
1939 | if (startp > ZV) startp = ZV, startp = ZV_BYTE; | |
a2889657 JB |
1940 | try_window (window, startp); |
1941 | if (cursor_vpos < 0) | |
1942 | { | |
1943 | /* If point does not appear, move point so it does appear */ | |
1944 | pos = *compute_motion (startp, 0, | |
ca26e1c8 KH |
1945 | (((EQ (window, minibuf_window) |
1946 | && startp == BEG) | |
1947 | ? minibuf_prompt_width : 0) | |
1948 | + (hscroll ? 1 - hscroll : 0)), | |
1949 | 0, | |
1950 | ZV, height / 2, | |
68be917d | 1951 | - (1 << (BITS_PER_SHORT - 1)), |
12adba34 RS |
1952 | width, hscroll, |
1953 | pos_tab_offset (w, startp, startp_byte), | |
1954 | w); | |
1955 | TEMP_SET_PT_BOTH (pos.bufpos, pos.bytepos); | |
90adcf20 | 1956 | if (w != XWINDOW (selected_window)) |
12adba34 | 1957 | set_marker_both (w->pointm, Qnil, PT, PT_BYTE); |
a2889657 JB |
1958 | else |
1959 | { | |
9d6a6bb9 | 1960 | if (current_buffer == old) |
12adba34 RS |
1961 | { |
1962 | lpoint = PT; | |
1963 | lpoint_byte = PT_BYTE; | |
1964 | } | |
73f194f1 | 1965 | FRAME_CURSOR_X (f) = (WINDOW_LEFT_MARGIN (w) |
210e752f | 1966 | + minmax (0, pos.hpos, width)); |
44fa5b1e | 1967 | FRAME_CURSOR_Y (f) = pos.vpos + XFASTINT (w->top); |
a2889657 | 1968 | } |
df0b5ea1 RS |
1969 | /* If we are highlighting the region, |
1970 | then we just changed the region, so redisplay to show it. */ | |
df0b5ea1 RS |
1971 | if (!NILP (Vtransient_mark_mode) |
1972 | && !NILP (current_buffer->mark_active)) | |
6f27fa9b RS |
1973 | { |
1974 | cancel_my_columns (XWINDOW (window)); | |
1975 | try_window (window, startp); | |
1976 | } | |
a2889657 JB |
1977 | } |
1978 | goto done; | |
1979 | } | |
1980 | ||
1981 | /* Handle case where text has not changed, only point, | |
208aee63 | 1982 | and it has not moved off the frame. */ |
a2889657 JB |
1983 | |
1984 | /* This code is not used for minibuffer for the sake of | |
1985 | the case of redisplaying to replace an echo area message; | |
1986 | since in that case the minibuffer contents per se are usually unchanged. | |
1987 | This code is of no real use in the minibuffer since | |
1988 | the handling of this_line_bufpos, etc., | |
1989 | in redisplay handles the same cases. */ | |
1990 | ||
1991 | if (XFASTINT (w->last_modified) >= MODIFF | |
8850a573 | 1992 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF |
86bee31c | 1993 | && PT >= startp && !current_buffer->clip_changed |
73f194f1 | 1994 | && (just_this_one || WINDOW_FULL_WIDTH_P (w)) |
b1aa6cb3 RS |
1995 | /* If force-mode-line-update was called, really redisplay; |
1996 | that's how redisplay is forced after e.g. changing | |
1997 | buffer-invisibility-spec. */ | |
632ab665 | 1998 | && NILP (w->update_mode_line) |
bd66d1ba RS |
1999 | /* Can't use this case if highlighting a region. */ |
2000 | && !(!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active)) | |
2001 | && NILP (w->region_showing) | |
15495c73 KH |
2002 | /* If end pos is out of date, scroll bar and percentage will be wrong */ |
2003 | && INTEGERP (w->window_end_vpos) | |
2004 | && XFASTINT (w->window_end_vpos) < XFASTINT (w->height) | |
d45de95b | 2005 | && !EQ (window, minibuf_window) |
377dbd97 RS |
2006 | && (!MARKERP (Voverlay_arrow_position) |
2007 | || current_buffer != XMARKER (Voverlay_arrow_position)->buffer)) | |
a2889657 | 2008 | { |
377dbd97 RS |
2009 | /* All positions in this clause are relative to the window edge. */ |
2010 | ||
9afd2168 | 2011 | int this_scroll_margin = scroll_margin; |
9c5886e7 | 2012 | int last_point_y = XFASTINT (w->last_point_y) - XINT (w->top); |
377dbd97 | 2013 | int last_point_x = (XFASTINT (w->last_point_x) - WINDOW_LEFT_MARGIN (w)); |
9afd2168 | 2014 | |
4cb46737 | 2015 | /* Find where PT is located now on the frame. */ |
916848d8 RS |
2016 | /* Check just_this_one as a way of verifying that the |
2017 | window edges have not changed. */ | |
9c5886e7 | 2018 | if (PT == XFASTINT (w->last_point) && just_this_one) |
4cb46737 | 2019 | { |
916848d8 RS |
2020 | pos.hpos = last_point_x; |
2021 | pos.vpos = last_point_y; | |
4cb46737 RS |
2022 | pos.bufpos = PT; |
2023 | } | |
9c5886e7 | 2024 | else if (PT > XFASTINT (w->last_point) |
d802580c RS |
2025 | && XFASTINT (w->last_point) > startp && just_this_one |
2026 | /* We can't use this if point is in the left margin of a | |
2027 | hscrolled window, because w->last_point_x has been | |
2028 | clipped to the window edges. */ | |
2029 | && !(last_point_x <= 0 && hscroll)) | |
4cb46737 | 2030 | { |
9c5886e7 RS |
2031 | pos = *compute_motion (XFASTINT (w->last_point), |
2032 | last_point_y, last_point_x, 0, | |
4cb46737 RS |
2033 | PT, height, |
2034 | /* BUG FIX: See the comment of | |
2035 | Fpos_visible_in_window_p (window.c). */ | |
2036 | - (1 << (BITS_PER_SHORT - 1)), | |
2037 | width, hscroll, | |
12adba34 RS |
2038 | pos_tab_offset (w, startp, startp_byte), |
2039 | w); | |
4cb46737 RS |
2040 | } |
2041 | else | |
2042 | { | |
2043 | pos = *compute_motion (startp, 0, (hscroll ? 1 - hscroll : 0), 0, | |
2044 | PT, height, | |
2045 | /* BUG FIX: See the comment of | |
2046 | Fpos_visible_in_window_p (window.c). */ | |
2047 | - (1 << (BITS_PER_SHORT - 1)), | |
2048 | width, hscroll, | |
12adba34 RS |
2049 | pos_tab_offset (w, startp, startp_byte), |
2050 | w); | |
4cb46737 | 2051 | } |
a2889657 | 2052 | |
9afd2168 RS |
2053 | /* Don't use a scroll margin that is negative or too large. */ |
2054 | if (this_scroll_margin < 0) | |
2055 | this_scroll_margin = 0; | |
2056 | ||
2057 | if (XINT (w->height) < 4 * scroll_margin) | |
2058 | this_scroll_margin = XINT (w->height) / 4; | |
2059 | ||
2060 | /* If point fits on the screen, and not within the scroll margin, | |
2061 | we are ok. */ | |
2062 | if (pos.vpos < height - this_scroll_margin | |
2063 | && (pos.vpos >= this_scroll_margin || startp == BEGV)) | |
a2889657 | 2064 | { |
44fa5b1e JB |
2065 | /* Ok, point is still on frame */ |
2066 | if (w == XWINDOW (FRAME_SELECTED_WINDOW (f))) | |
a2889657 JB |
2067 | { |
2068 | /* These variables are supposed to be origin 1 */ | |
73f194f1 | 2069 | FRAME_CURSOR_X (f) = (WINDOW_LEFT_MARGIN (w) |
210e752f | 2070 | + minmax (0, pos.hpos, width)); |
44fa5b1e | 2071 | FRAME_CURSOR_Y (f) = pos.vpos + XFASTINT (w->top); |
a2889657 JB |
2072 | } |
2073 | /* This doesn't do the trick, because if a window to the right of | |
2074 | this one must be redisplayed, this does nothing because there | |
44fa5b1e | 2075 | is nothing in DesiredFrame yet, and then the other window is |
a2889657 | 2076 | redisplayed, making likes that are empty in this window's columns. |
73f194f1 | 2077 | if (WINDOW_FULL_WIDTH_P (w)) |
a2889657 JB |
2078 | preserve_my_columns (w); |
2079 | */ | |
abb4c08f KH |
2080 | if (current_buffer->clip_changed |
2081 | && ! NILP (Vwindow_scroll_functions)) | |
2082 | run_hook_with_args_2 (Qwindow_scroll_functions, window, | |
2083 | make_number (marker_position (w->start))); | |
2084 | ||
a2889657 JB |
2085 | goto done; |
2086 | } | |
2087 | /* Don't bother trying redisplay with same start; | |
2088 | we already know it will lose */ | |
2089 | } | |
2090 | /* If current starting point was originally the beginning of a line | |
2091 | but no longer is, find a new starting point. */ | |
265a9e55 | 2092 | else if (!NILP (w->start_at_line_beg) |
b16234d8 | 2093 | && !(startp <= BEGV |
12adba34 | 2094 | || FETCH_BYTE (startp_byte - 1) == '\n')) |
a2889657 JB |
2095 | { |
2096 | goto recenter; | |
2097 | } | |
2098 | else if (just_this_one && !MINI_WINDOW_P (w) | |
ae3b1442 | 2099 | && PT >= startp |
a2889657 | 2100 | && XFASTINT (w->last_modified) |
14709f21 JB |
2101 | /* or else vmotion on first line won't work. */ |
2102 | && ! NILP (w->start_at_line_beg) | |
a2889657 | 2103 | && ! EQ (w->window_end_valid, Qnil) |
86bee31c | 2104 | && do_id && !current_buffer->clip_changed |
a2889657 | 2105 | && !blank_end_of_window |
73f194f1 | 2106 | && WINDOW_FULL_WIDTH_P (w) |
bd66d1ba RS |
2107 | /* Can't use this case if highlighting a region. */ |
2108 | && !(!NILP (Vtransient_mark_mode) | |
2109 | && !NILP (current_buffer->mark_active)) | |
23c852cb KH |
2110 | /* Don't use try_window_id if newline |
2111 | doesn't display as the end of a line. */ | |
2112 | && !(dp != 0 && VECTORP (DISP_CHAR_VECTOR (dp, '\n'))) | |
bd66d1ba | 2113 | && NILP (w->region_showing) |
d45de95b | 2114 | && EQ (last_arrow_position, COERCE_MARKER (Voverlay_arrow_position)) |
a2889657 | 2115 | && EQ (last_arrow_string, Voverlay_arrow_string) |
44fa5b1e | 2116 | && (tem = try_window_id (FRAME_SELECTED_WINDOW (f))) |
a2889657 JB |
2117 | && tem != -2) |
2118 | { | |
2119 | /* tem > 0 means success. tem == -1 means choose new start. | |
2120 | tem == -2 means try again with same start, | |
2121 | and nothing but whitespace follows the changed stuff. | |
2122 | tem == 0 means try again with same start. */ | |
2123 | if (tem > 0) | |
2124 | goto done; | |
2125 | } | |
2126 | else if (startp >= BEGV && startp <= ZV | |
e9874cee RS |
2127 | && (startp < ZV |
2128 | /* Avoid starting at end of buffer. */ | |
2129 | #if 0 /* This change causes trouble for M-! finger & RET. | |
2130 | It will have to be considered later. */ | |
2131 | || ! EQ (window, selected_window) | |
2132 | /* Don't do the recentering if redisplay | |
2133 | is not for no user action. */ | |
2134 | || preserve_echo_area | |
2135 | #endif | |
2136 | || startp == BEGV | |
8850a573 RS |
2137 | || (XFASTINT (w->last_modified) >= MODIFF |
2138 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF))) | |
a2889657 JB |
2139 | { |
2140 | /* Try to redisplay starting at same place as before */ | |
44fa5b1e | 2141 | /* If point has not moved off frame, accept the results */ |
a2889657 JB |
2142 | try_window (window, startp); |
2143 | if (cursor_vpos >= 0) | |
aa6d10fa | 2144 | { |
28995e67 RS |
2145 | if (!just_this_one || current_buffer->clip_changed |
2146 | || beg_unchanged < startp) | |
aa6d10fa RS |
2147 | /* Forget any recorded base line for line number display. */ |
2148 | w->base_line_number = Qnil; | |
abb4c08f KH |
2149 | |
2150 | if (current_buffer->clip_changed | |
2151 | && ! NILP (Vwindow_scroll_functions)) | |
2152 | run_hook_with_args_2 (Qwindow_scroll_functions, window, | |
2153 | make_number (marker_position (w->start))); | |
2154 | ||
aa6d10fa RS |
2155 | goto done; |
2156 | } | |
a2889657 JB |
2157 | else |
2158 | cancel_my_columns (w); | |
2159 | } | |
2160 | ||
c2213350 | 2161 | XSETFASTINT (w->last_modified, 0); |
8850a573 | 2162 | XSETFASTINT (w->last_overlay_modified, 0); |
e481f960 RS |
2163 | /* Redisplay the mode line. Select the buffer properly for that. */ |
2164 | if (!update_mode_line) | |
2165 | { | |
2166 | set_buffer_temp (old); | |
f72df6ac | 2167 | set_buffer_internal_1 (XBUFFER (w->buffer)); |
e481f960 RS |
2168 | update_mode_line = 1; |
2169 | w->update_mode_line = Qt; | |
2170 | } | |
a2889657 JB |
2171 | |
2172 | /* Try to scroll by specified few lines */ | |
2173 | ||
0789adb2 RS |
2174 | if (scroll_conservatively && !current_buffer->clip_changed |
2175 | && startp >= BEGV && startp <= ZV) | |
2176 | { | |
f9c8af06 | 2177 | int this_scroll_margin = scroll_margin; |
44173109 | 2178 | int scroll_margin_pos; |
f9c8af06 RS |
2179 | |
2180 | /* Don't use a scroll margin that is negative or too large. */ | |
2181 | if (this_scroll_margin < 0) | |
2182 | this_scroll_margin = 0; | |
2183 | ||
44173109 | 2184 | if (XINT (w->height) < 4 * this_scroll_margin) |
f9c8af06 RS |
2185 | this_scroll_margin = XINT (w->height) / 4; |
2186 | ||
44173109 RS |
2187 | scroll_margin_pos = Z - XFASTINT (w->window_end_pos); |
2188 | if (this_scroll_margin) | |
2189 | { | |
2190 | pos = *vmotion (scroll_margin_pos, -this_scroll_margin, w); | |
2191 | scroll_margin_pos = pos.bufpos; | |
2192 | } | |
2193 | if (PT >= scroll_margin_pos) | |
0789adb2 RS |
2194 | { |
2195 | struct position pos; | |
44173109 | 2196 | pos = *compute_motion (scroll_margin_pos, 0, 0, 0, |
0789adb2 RS |
2197 | PT, XFASTINT (w->height), 0, |
2198 | XFASTINT (w->width), XFASTINT (w->hscroll), | |
12adba34 RS |
2199 | pos_tab_offset (w, startp, startp_byte), |
2200 | w); | |
0789adb2 RS |
2201 | if (pos.vpos > scroll_conservatively) |
2202 | goto scroll_fail_1; | |
2203 | ||
44173109 | 2204 | pos = *vmotion (startp, pos.vpos + 1, w); |
0789adb2 RS |
2205 | |
2206 | if (! NILP (Vwindow_scroll_functions)) | |
2207 | { | |
12adba34 | 2208 | set_marker_both (w->start, Qnil, pos.bufpos, pos.bytepos); |
0789adb2 RS |
2209 | run_hook_with_args_2 (Qwindow_scroll_functions, window, |
2210 | make_number (pos.bufpos)); | |
2211 | pos.bufpos = marker_position (w->start); | |
2212 | } | |
2213 | try_window (window, pos.bufpos); | |
2214 | if (cursor_vpos >= 0) | |
2215 | { | |
2216 | if (!just_this_one || current_buffer->clip_changed | |
2217 | || beg_unchanged < startp) | |
2218 | /* Forget any recorded base line for line number display. */ | |
2219 | w->base_line_number = Qnil; | |
2220 | goto done; | |
2221 | } | |
2222 | else | |
2223 | cancel_my_columns (w); | |
2224 | } | |
44173109 RS |
2225 | |
2226 | scroll_margin_pos = startp; | |
2227 | if (this_scroll_margin) | |
2228 | { | |
2229 | pos = *vmotion (scroll_margin_pos, this_scroll_margin, w); | |
2230 | scroll_margin_pos = pos.bufpos; | |
2231 | } | |
2232 | if (PT < scroll_margin_pos) | |
0789adb2 RS |
2233 | { |
2234 | struct position pos; | |
2235 | pos = *compute_motion (PT, 0, 0, 0, | |
44173109 | 2236 | scroll_margin_pos, XFASTINT (w->height), 0, |
0789adb2 | 2237 | XFASTINT (w->width), XFASTINT (w->hscroll), |
12adba34 RS |
2238 | pos_tab_offset (w, startp, startp_byte), |
2239 | w); | |
52bc7624 | 2240 | if (pos.vpos > scroll_conservatively) |
0789adb2 RS |
2241 | goto scroll_fail_1; |
2242 | ||
44173109 | 2243 | pos = *vmotion (startp, -pos.vpos, w); |
0789adb2 RS |
2244 | |
2245 | if (! NILP (Vwindow_scroll_functions)) | |
2246 | { | |
12adba34 | 2247 | set_marker_both (w->start, Qnil, pos.bufpos, pos.bytepos); |
0789adb2 RS |
2248 | run_hook_with_args_2 (Qwindow_scroll_functions, window, |
2249 | make_number (pos.bufpos)); | |
2250 | pos.bufpos = marker_position (w->start); | |
2251 | } | |
2252 | try_window (window, pos.bufpos); | |
2253 | if (cursor_vpos >= 0) | |
2254 | { | |
2255 | if (!just_this_one || current_buffer->clip_changed | |
2256 | || beg_unchanged < startp) | |
2257 | /* Forget any recorded base line for line number display. */ | |
2258 | w->base_line_number = Qnil; | |
2259 | goto done; | |
2260 | } | |
2261 | else | |
2262 | cancel_my_columns (w); | |
2263 | } | |
2264 | scroll_fail_1: ; | |
2265 | } | |
2266 | ||
2c081c2d KH |
2267 | if (scroll_step && !current_buffer->clip_changed |
2268 | && startp >= BEGV && startp <= ZV) | |
a2889657 | 2269 | { |
ae3b1442 | 2270 | if (PT > startp) |
a2889657 | 2271 | { |
210e752f | 2272 | pos = *vmotion (Z - XFASTINT (w->window_end_pos), scroll_step, w); |
a2889657 JB |
2273 | if (pos.vpos >= height) |
2274 | goto scroll_fail; | |
2275 | } | |
2276 | ||
210e752f | 2277 | pos = *vmotion (startp, (PT < startp ? - scroll_step : scroll_step), w); |
a2889657 | 2278 | |
ae3b1442 | 2279 | if (PT >= pos.bufpos) |
a2889657 | 2280 | { |
75c43375 | 2281 | if (! NILP (Vwindow_scroll_functions)) |
3dcd07e3 | 2282 | { |
12adba34 | 2283 | set_marker_both (w->start, Qnil, pos.bufpos, pos.bytepos); |
3dcd07e3 KH |
2284 | run_hook_with_args_2 (Qwindow_scroll_functions, window, |
2285 | make_number (pos.bufpos)); | |
2286 | pos.bufpos = marker_position (w->start); | |
2287 | } | |
a2889657 JB |
2288 | try_window (window, pos.bufpos); |
2289 | if (cursor_vpos >= 0) | |
aa6d10fa | 2290 | { |
28995e67 RS |
2291 | if (!just_this_one || current_buffer->clip_changed |
2292 | || beg_unchanged < startp) | |
aa6d10fa RS |
2293 | /* Forget any recorded base line for line number display. */ |
2294 | w->base_line_number = Qnil; | |
2295 | goto done; | |
2296 | } | |
a2889657 JB |
2297 | else |
2298 | cancel_my_columns (w); | |
2299 | } | |
2300 | scroll_fail: ; | |
2301 | } | |
2302 | ||
2303 | /* Finally, just choose place to start which centers point */ | |
2304 | ||
2305 | recenter: | |
aa6d10fa RS |
2306 | /* Forget any previously recorded base line for line number display. */ |
2307 | w->base_line_number = Qnil; | |
2308 | ||
210e752f | 2309 | pos = *vmotion (PT, - (height / 2), w); |
010494d0 KH |
2310 | |
2311 | /* The minibuffer is often just one line. Ordinary scrolling | |
2312 | gives little overlap and looks bad. So show 20 chars before point. */ | |
2313 | if (height == 1 | |
2314 | && (pos.bufpos >= PT - minibuffer_scroll_overlap | |
2315 | /* If we scrolled less than 1/2 line forward, we will | |
2316 | get too much overlap, so change to the usual amount. */ | |
2317 | || pos.bufpos < startp + width / 2) | |
2318 | && PT > BEGV + minibuffer_scroll_overlap | |
2319 | /* If we scrolled to an actual line boundary, | |
2320 | that's different; don't ignore line boundaries. */ | |
12adba34 | 2321 | && FETCH_BYTE (pos.bufpos - 1) != '\n') |
835766b6 RS |
2322 | { |
2323 | pos.bufpos = PT - minibuffer_scroll_overlap; | |
2324 | pos.bytepos = CHAR_TO_BYTE (pos.bufpos); | |
2325 | } | |
010494d0 | 2326 | |
e63574d7 RS |
2327 | /* Set startp here explicitly in case that helps avoid an infinite loop |
2328 | in case the window-scroll-functions functions get errors. */ | |
12adba34 | 2329 | set_marker_both (w->start, Qnil, pos.bufpos, pos.bytepos); |
75c43375 | 2330 | if (! NILP (Vwindow_scroll_functions)) |
3dcd07e3 KH |
2331 | { |
2332 | run_hook_with_args_2 (Qwindow_scroll_functions, window, | |
2333 | make_number (pos.bufpos)); | |
2334 | pos.bufpos = marker_position (w->start); | |
835766b6 | 2335 | pos.bytepos = marker_byte_position (w->start); |
3dcd07e3 | 2336 | } |
a2889657 JB |
2337 | try_window (window, pos.bufpos); |
2338 | ||
2339 | startp = marker_position (w->start); | |
12adba34 | 2340 | startp_byte = marker_byte_position (w->start); |
ca26e1c8 | 2341 | w->start_at_line_beg |
12adba34 | 2342 | = (startp == BEGV || FETCH_BYTE (startp_byte - 1) == '\n') ? Qt : Qnil; |
a2889657 JB |
2343 | |
2344 | done: | |
e481f960 | 2345 | if ((update_mode_line |
aa6d10fa RS |
2346 | /* If window not full width, must redo its mode line |
2347 | if the window to its side is being redone */ | |
73f194f1 | 2348 | || (!just_this_one && !WINDOW_FULL_WIDTH_P (w)) |
155ef550 KH |
2349 | || INTEGERP (w->base_line_pos) |
2350 | || (!NILP (w->column_number_displayed) | |
2351 | && XFASTINT (w->column_number_displayed) != current_column ())) | |
a2889657 JB |
2352 | && height != XFASTINT (w->height)) |
2353 | display_mode_line (w); | |
aa6d10fa RS |
2354 | if (! line_number_displayed |
2355 | && ! BUFFERP (w->base_line_pos)) | |
2356 | { | |
2357 | w->base_line_pos = Qnil; | |
2358 | w->base_line_number = Qnil; | |
2359 | } | |
a2889657 | 2360 | |
7ce2c095 | 2361 | /* When we reach a frame's selected window, redo the frame's menu bar. */ |
e481f960 | 2362 | if (update_mode_line |
d1e74921 | 2363 | && (FRAME_WINDOW_P (f) |
d3413a53 | 2364 | ? |
dc937613 | 2365 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) |
d3413a53 | 2366 | FRAME_EXTERNAL_MENU_BAR (f) |
76412d64 | 2367 | #else |
d3413a53 | 2368 | FRAME_MENU_BAR_LINES (f) > 0 |
76412d64 | 2369 | #endif |
d3413a53 | 2370 | : FRAME_MENU_BAR_LINES (f) > 0) |
7ce2c095 RS |
2371 | && EQ (FRAME_SELECTED_WINDOW (f), window)) |
2372 | display_menu_bar (w); | |
2373 | ||
88f22aff JB |
2374 | finish_scroll_bars: |
2375 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) | |
30c566e4 | 2376 | { |
b1d1124b | 2377 | int start, end, whole; |
30c566e4 | 2378 | |
b1d1124b | 2379 | /* Calculate the start and end positions for the current window. |
3505ea70 JB |
2380 | At some point, it would be nice to choose between scrollbars |
2381 | which reflect the whole buffer size, with special markers | |
2382 | indicating narrowing, and scrollbars which reflect only the | |
2383 | visible region. | |
2384 | ||
b1d1124b JB |
2385 | Note that minibuffers sometimes aren't displaying any text. */ |
2386 | if (! MINI_WINDOW_P (w) | |
2387 | || (w == XWINDOW (minibuf_window) && ! echo_area_glyphs)) | |
2388 | { | |
8a9311d7 | 2389 | whole = ZV - BEGV; |
4d641a15 | 2390 | start = marker_position (w->start) - BEGV; |
b1d1124b JB |
2391 | /* I don't think this is guaranteed to be right. For the |
2392 | moment, we'll pretend it is. */ | |
85f26be9 | 2393 | end = (Z - XINT (w->window_end_pos)) - BEGV; |
3505ea70 JB |
2394 | |
2395 | if (end < start) end = start; | |
8a9311d7 | 2396 | if (whole < (end - start)) whole = end - start; |
b1d1124b JB |
2397 | } |
2398 | else | |
2399 | start = end = whole = 0; | |
30c566e4 | 2400 | |
88f22aff | 2401 | /* Indicate what this scroll bar ought to be displaying now. */ |
7eb9ba41 | 2402 | (*set_vertical_scroll_bar_hook) (w, end - start, whole, start); |
30c566e4 | 2403 | |
88f22aff | 2404 | /* Note that we actually used the scroll bar attached to this window, |
30c566e4 | 2405 | so it shouldn't be deleted at the end of redisplay. */ |
88f22aff | 2406 | (*redeem_scroll_bar_hook) (w); |
30c566e4 | 2407 | } |
b1d1124b | 2408 | |
12adba34 | 2409 | TEMP_SET_PT_BOTH (opoint, opoint_byte); |
e481f960 | 2410 | if (update_mode_line) |
f72df6ac | 2411 | set_buffer_internal_1 (old); |
e481f960 RS |
2412 | else |
2413 | set_buffer_temp (old); | |
12adba34 | 2414 | TEMP_SET_PT_BOTH (lpoint, lpoint_byte); |
a2889657 JB |
2415 | } |
2416 | \f | |
2417 | /* Do full redisplay on one window, starting at position `pos'. */ | |
2418 | ||
2419 | static void | |
2420 | try_window (window, pos) | |
2421 | Lisp_Object window; | |
2422 | register int pos; | |
2423 | { | |
2424 | register struct window *w = XWINDOW (window); | |
2425 | register int height = window_internal_height (w); | |
2426 | register int vpos = XFASTINT (w->top); | |
2427 | register int last_text_vpos = vpos; | |
44fa5b1e | 2428 | FRAME_PTR f = XFRAME (w->frame); |
b1d1124b | 2429 | int width = window_internal_width (w) - 1; |
a2889657 JB |
2430 | struct position val; |
2431 | ||
9cbab4ff RS |
2432 | /* POS should never be out of range! */ |
2433 | if (pos < XBUFFER (w->buffer)->begv | |
2434 | || pos > XBUFFER (w->buffer)->zv) | |
2435 | abort (); | |
2436 | ||
12adba34 RS |
2437 | if (XMARKER (w->start)->charpos != pos) |
2438 | Fset_marker (w->start, make_number (pos), Qnil); | |
2439 | ||
a2889657 JB |
2440 | cursor_vpos = -1; |
2441 | overlay_arrow_seen = 0; | |
ca26e1c8 | 2442 | zv_strings_seen = 0; |
a2889657 | 2443 | val.hpos = XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0; |
0f9c0ff0 | 2444 | val.ovstring_chars_done = 0; |
12adba34 RS |
2445 | val.bytepos = marker_byte_position (w->start); |
2446 | val.tab_offset = pos_tab_offset (w, pos, val.bytepos); | |
a2889657 JB |
2447 | |
2448 | while (--height >= 0) | |
2449 | { | |
12adba34 RS |
2450 | val = *display_text_line (w, pos, val.bytepos, vpos, |
2451 | val.hpos, val.tab_offset, | |
0f9c0ff0 | 2452 | val.ovstring_chars_done); |
1c9241f5 KH |
2453 | /* The following code is omitted because we maintain tab_offset |
2454 | in VAL. */ | |
2455 | #if 0 | |
a2889657 JB |
2456 | tab_offset += width; |
2457 | if (val.vpos) tab_offset = 0; | |
1c9241f5 | 2458 | #endif /* 0 */ |
a2889657 JB |
2459 | vpos++; |
2460 | if (pos != val.bufpos) | |
642eefc6 RS |
2461 | { |
2462 | int invis = 0; | |
e885523c | 2463 | #ifdef USE_TEXT_PROPERTIES |
642eefc6 RS |
2464 | Lisp_Object invis_prop; |
2465 | invis_prop = Fget_char_property (val.bufpos-1, Qinvisible, window); | |
2466 | invis = TEXT_PROP_MEANS_INVISIBLE (invis_prop); | |
e885523c | 2467 | #endif |
642eefc6 RS |
2468 | |
2469 | last_text_vpos | |
2470 | /* Next line, unless prev line ended in end of buffer with no cr */ | |
2471 | = vpos - (val.vpos | |
12adba34 | 2472 | && (FETCH_BYTE (val.bytepos - 1) != '\n' || invis)); |
642eefc6 | 2473 | } |
a2889657 JB |
2474 | pos = val.bufpos; |
2475 | } | |
2476 | ||
2477 | /* If last line is continued in middle of character, | |
44fa5b1e | 2478 | include the split character in the text considered on the frame */ |
a2889657 JB |
2479 | if (val.hpos < (XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0)) |
2480 | pos++; | |
2481 | ||
44fa5b1e | 2482 | /* If bottom just moved off end of frame, change mode line percentage. */ |
a2889657 JB |
2483 | if (XFASTINT (w->window_end_pos) == 0 |
2484 | && Z != pos) | |
2485 | w->update_mode_line = Qt; | |
2486 | ||
44fa5b1e | 2487 | /* Say where last char on frame will be, once redisplay is finished. */ |
c2213350 KH |
2488 | XSETFASTINT (w->window_end_pos, Z - pos); |
2489 | XSETFASTINT (w->window_end_vpos, last_text_vpos - XFASTINT (w->top)); | |
a2889657 JB |
2490 | /* But that is not valid info until redisplay finishes. */ |
2491 | w->window_end_valid = Qnil; | |
2492 | } | |
2493 | \f | |
2494 | /* Try to redisplay when buffer is modified locally, | |
2495 | computing insert/delete line to preserve text outside | |
2496 | the bounds of the changes. | |
2497 | Return 1 if successful, 0 if if cannot tell what to do, | |
2498 | or -1 to tell caller to find a new window start, | |
2499 | or -2 to tell caller to do normal redisplay with same window start. */ | |
2500 | ||
2501 | static int | |
2502 | try_window_id (window) | |
2503 | Lisp_Object window; | |
2504 | { | |
12adba34 RS |
2505 | int pos, pos_byte; |
2506 | int opoint, opoint_byte; | |
a2889657 JB |
2507 | register struct window *w = XWINDOW (window); |
2508 | register int height = window_internal_height (w); | |
44fa5b1e | 2509 | FRAME_PTR f = XFRAME (w->frame); |
a2889657 JB |
2510 | int top = XFASTINT (w->top); |
2511 | int start = marker_position (w->start); | |
b1d1124b | 2512 | int width = window_internal_width (w) - 1; |
a2889657 JB |
2513 | int hscroll = XINT (w->hscroll); |
2514 | int lmargin = hscroll > 0 ? 1 - hscroll : 0; | |
ca26e1c8 | 2515 | int did_motion; |
a2889657 JB |
2516 | register int vpos; |
2517 | register int i, tem; | |
2518 | int last_text_vpos = 0; | |
2519 | int stop_vpos; | |
e24c997d KH |
2520 | int selective = (INTEGERP (current_buffer->selective_display) |
2521 | ? XINT (current_buffer->selective_display) | |
2522 | : !NILP (current_buffer->selective_display) ? -1 : 0); | |
0d09d1e6 | 2523 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
a2889657 JB |
2524 | struct position val, bp, ep, xp, pp; |
2525 | int scroll_amount = 0; | |
2526 | int delta; | |
1c9241f5 | 2527 | int epto, old_tick; |
a2889657 | 2528 | |
12adba34 RS |
2529 | int start_byte = marker_byte_position (w->start); |
2530 | ||
a2889657 JB |
2531 | if (GPT - BEG < beg_unchanged) |
2532 | beg_unchanged = GPT - BEG; | |
2533 | if (Z - GPT < end_unchanged) | |
2534 | end_unchanged = Z - GPT; | |
2535 | ||
6a1dc7ac | 2536 | if (beg_unchanged + BEG < start) |
a2889657 JB |
2537 | return 0; /* Give up if changes go above top of window */ |
2538 | ||
2539 | /* Find position before which nothing is changed. */ | |
ca26e1c8 | 2540 | bp = *compute_motion (start, 0, lmargin, 0, |
1c9241f5 KH |
2541 | min (ZV, beg_unchanged + BEG), height, |
2542 | /* BUG FIX: See the comment of | |
12adba34 | 2543 | Fpos_visible_in_window_p (window.c). */ |
1c9241f5 | 2544 | - (1 << (BITS_PER_SHORT - 1)), |
12adba34 RS |
2545 | width, hscroll, |
2546 | pos_tab_offset (w, start, start_byte), | |
2547 | w); | |
a2889657 | 2548 | if (bp.vpos >= height) |
6e8290aa | 2549 | { |
632ab665 | 2550 | if (PT < bp.bufpos) |
6e8290aa | 2551 | { |
67481ae5 RS |
2552 | /* All changes are beyond the window end, and point is on the screen. |
2553 | We don't need to change the text at all. | |
6e8290aa JB |
2554 | But we need to update window_end_pos to account for |
2555 | any change in buffer size. */ | |
ca26e1c8 | 2556 | bp = *compute_motion (start, 0, lmargin, 0, |
1c9241f5 KH |
2557 | ZV, height, |
2558 | /* BUG FIX: See the comment of | |
2559 | Fpos_visible_in_window_p() (window.c). */ | |
2560 | - (1 << (BITS_PER_SHORT - 1)), | |
12adba34 RS |
2561 | width, hscroll, |
2562 | pos_tab_offset (w, start, start_byte), w); | |
c2213350 KH |
2563 | XSETFASTINT (w->window_end_vpos, height); |
2564 | XSETFASTINT (w->window_end_pos, Z - bp.bufpos); | |
4d641a15 | 2565 | goto findpoint; |
6e8290aa JB |
2566 | } |
2567 | return 0; | |
2568 | } | |
a2889657 JB |
2569 | |
2570 | vpos = bp.vpos; | |
2571 | ||
44fa5b1e | 2572 | /* Find beginning of that frame line. Must display from there. */ |
210e752f | 2573 | bp = *vmotion (bp.bufpos, 0, w); |
a2889657 JB |
2574 | |
2575 | pos = bp.bufpos; | |
12adba34 | 2576 | pos_byte = bp.bytepos; |
a2889657 JB |
2577 | val.hpos = lmargin; |
2578 | if (pos < start) | |
2579 | return -1; | |
2580 | ||
ca26e1c8 | 2581 | did_motion = 0; |
a2889657 | 2582 | /* If about to start displaying at the beginning of a continuation line, |
44fa5b1e | 2583 | really start with previous frame line, in case it was not |
a2889657 | 2584 | continued when last redisplayed */ |
05ba02eb JB |
2585 | if ((bp.contin && bp.bufpos - 1 == beg_unchanged && vpos > 0) |
2586 | || | |
2587 | /* Likewise if we have to worry about selective display. */ | |
9f412332 | 2588 | (selective > 0 && bp.bufpos - 1 == beg_unchanged && vpos > 0)) |
a2889657 | 2589 | { |
210e752f | 2590 | bp = *vmotion (bp.bufpos, -1, w); |
a2889657 JB |
2591 | --vpos; |
2592 | pos = bp.bufpos; | |
12adba34 | 2593 | pos_byte = bp.bytepos; |
a2889657 | 2594 | } |
1c9241f5 | 2595 | val.tab_offset = bp.tab_offset; /* Update tab offset. */ |
a2889657 JB |
2596 | |
2597 | if (bp.contin && bp.hpos != lmargin) | |
2598 | { | |
2599 | val.hpos = bp.prevhpos - width + lmargin; | |
1c9241f5 | 2600 | val.tab_offset = bp.tab_offset + bp.prevhpos - width; |
ca26e1c8 | 2601 | did_motion = 1; |
12adba34 | 2602 | pos--; |
0d09d1e6 KH |
2603 | if (multibyte) |
2604 | DEC_POS (pos_byte); | |
2605 | else | |
2606 | pos_byte--; | |
a2889657 JB |
2607 | } |
2608 | ||
2609 | bp.vpos = vpos; | |
2610 | ||
2611 | /* Find first visible newline after which no more is changed. */ | |
12adba34 RS |
2612 | opoint = PT, opoint_byte = PT_BYTE; |
2613 | SET_PT (Z - max (end_unchanged, Z - ZV)); | |
2614 | scan_newline (PT, PT_BYTE, ZV, ZV_BYTE, 1, 1); | |
9f412332 | 2615 | if (selective > 0) |
12adba34 RS |
2616 | while (PT < ZV - 1 && indented_beyond_p (PT, PT_BYTE, selective)) |
2617 | scan_newline (PT, PT_BYTE, ZV, ZV_BYTE, 1, 1); | |
2618 | tem = PT; | |
2619 | SET_PT_BOTH (opoint, opoint_byte); | |
a2889657 JB |
2620 | |
2621 | /* Compute the cursor position after that newline. */ | |
ca26e1c8 | 2622 | ep = *compute_motion (pos, vpos, val.hpos, did_motion, tem, |
68be917d | 2623 | height, - (1 << (BITS_PER_SHORT - 1)), |
1c9241f5 KH |
2624 | width, hscroll, |
2625 | /* We have tab offset in VAL, use it. */ | |
2626 | val.tab_offset, w); | |
a2889657 | 2627 | |
44fa5b1e JB |
2628 | /* If changes reach past the text available on the frame, |
2629 | just display rest of frame. */ | |
a2889657 JB |
2630 | if (ep.bufpos > Z - XFASTINT (w->window_end_pos)) |
2631 | stop_vpos = height; | |
2632 | else | |
2633 | stop_vpos = ep.vpos; | |
2634 | ||
2635 | /* If no newline before ep, the line ep is on includes some changes | |
2636 | that must be displayed. Make sure we don't stop before it. */ | |
2637 | /* Also, if changes reach all the way until ep.bufpos, | |
2638 | it is possible that something was deleted after the | |
2639 | newline before it, so the following line must be redrawn. */ | |
2640 | if (stop_vpos == ep.vpos | |
2641 | && (ep.bufpos == BEGV | |
1c9241f5 | 2642 | || FETCH_BYTE (ep.bufpos - 1) != '\n' |
a2889657 JB |
2643 | || ep.bufpos == Z - end_unchanged)) |
2644 | stop_vpos = ep.vpos + 1; | |
2645 | ||
2646 | cursor_vpos = -1; | |
2647 | overlay_arrow_seen = 0; | |
ca26e1c8 | 2648 | zv_strings_seen = 0; |
a2889657 JB |
2649 | |
2650 | /* If changes do not reach to bottom of window, | |
2651 | figure out how much to scroll the rest of the window */ | |
2652 | if (stop_vpos < height) | |
2653 | { | |
2654 | /* Now determine how far up or down the rest of the window has moved */ | |
ca26e1c8 | 2655 | xp = *compute_motion (ep.bufpos, ep.vpos, ep.hpos, 1, |
a2889657 | 2656 | Z - XFASTINT (w->window_end_pos), |
1c9241f5 KH |
2657 | /* Don't care for VPOS... */ |
2658 | 1 << (BITS_PER_SHORT - 1), | |
2659 | /* ... nor HPOS. */ | |
2660 | 1 << (BITS_PER_SHORT - 1), | |
2661 | width, hscroll, ep.tab_offset, w); | |
a2889657 JB |
2662 | scroll_amount = xp.vpos - XFASTINT (w->window_end_vpos); |
2663 | ||
44fa5b1e | 2664 | /* Is everything on frame below the changes whitespace? |
a2889657 JB |
2665 | If so, no scrolling is really necessary. */ |
2666 | for (i = ep.bufpos; i < xp.bufpos; i++) | |
2667 | { | |
1c9241f5 | 2668 | tem = FETCH_BYTE (i); |
a2889657 JB |
2669 | if (tem != ' ' && tem != '\n' && tem != '\t') |
2670 | break; | |
2671 | } | |
2672 | if (i == xp.bufpos) | |
2673 | return -2; | |
2674 | ||
e8e536a9 KH |
2675 | XSETFASTINT (w->window_end_vpos, |
2676 | XFASTINT (w->window_end_vpos) + scroll_amount); | |
a2889657 | 2677 | |
44fa5b1e | 2678 | /* Before doing any scrolling, verify that point will be on frame. */ |
010a899e | 2679 | if (PT > ep.bufpos && !(PT <= xp.bufpos && xp.vpos < height)) |
a2889657 | 2680 | { |
ae3b1442 | 2681 | if (PT <= xp.bufpos) |
a2889657 | 2682 | { |
ca26e1c8 | 2683 | pp = *compute_motion (ep.bufpos, ep.vpos, ep.hpos, 1, |
68be917d | 2684 | PT, height, - (1 << (BITS_PER_SHORT - 1)), |
1c9241f5 KH |
2685 | width, hscroll, |
2686 | /* We have tab offset in EP, use it. */ | |
2687 | ep.tab_offset, w); | |
a2889657 JB |
2688 | } |
2689 | else | |
2690 | { | |
ca26e1c8 | 2691 | pp = *compute_motion (xp.bufpos, xp.vpos, xp.hpos, 1, |
68be917d | 2692 | PT, height, - (1 << (BITS_PER_SHORT - 1)), |
e37f06d7 | 2693 | width, hscroll, |
1c9241f5 KH |
2694 | /* We have tab offset in XP, use it. */ |
2695 | xp.tab_offset, w); | |
a2889657 | 2696 | } |
ae3b1442 | 2697 | if (pp.bufpos < PT || pp.vpos == height) |
a2889657 JB |
2698 | return 0; |
2699 | cursor_vpos = pp.vpos + top; | |
73f194f1 | 2700 | cursor_hpos = WINDOW_LEFT_MARGIN (w) + minmax (0, pp.hpos, width); |
a2889657 JB |
2701 | } |
2702 | ||
2703 | if (stop_vpos - scroll_amount >= height | |
2704 | || ep.bufpos == xp.bufpos) | |
2705 | { | |
2706 | if (scroll_amount < 0) | |
2707 | stop_vpos -= scroll_amount; | |
2708 | scroll_amount = 0; | |
2709 | /* In this path, we have altered window_end_vpos | |
2710 | and not left it negative. | |
2711 | We must make sure that, in case display is preempted | |
44fa5b1e | 2712 | before the frame changes to reflect what we do here, |
a2889657 | 2713 | further updates will not come to try_window_id |
44fa5b1e | 2714 | and assume the frame and window_end_vpos match. */ |
a2889657 JB |
2715 | blank_end_of_window = 1; |
2716 | } | |
2717 | else if (!scroll_amount) | |
0d231165 RS |
2718 | { |
2719 | /* Even if we don't need to scroll, we must adjust the | |
2720 | charstarts of subsequent lines (that we won't redisplay) | |
2721 | according to the amount of text inserted or deleted. */ | |
2722 | int oldpos = FRAME_CURRENT_GLYPHS (f)->charstarts[ep.vpos + top][0]; | |
2723 | int adjust = ep.bufpos - oldpos; | |
2724 | adjust_window_charstarts (w, ep.vpos + top - 1, adjust); | |
2725 | } | |
a2889657 JB |
2726 | else if (bp.bufpos == Z - end_unchanged) |
2727 | { | |
2728 | /* If reprinting everything is nearly as fast as scrolling, | |
2729 | don't bother scrolling. Can happen if lines are short. */ | |
44fa5b1e | 2730 | if (scroll_cost (f, bp.vpos + top - scroll_amount, |
a2889657 JB |
2731 | top + height - max (0, scroll_amount), |
2732 | scroll_amount) | |
2733 | > xp.bufpos - bp.bufpos - 20) | |
2734 | /* Return "try normal display with same window-start." | |
2735 | Too bad we can't prevent further scroll-thinking. */ | |
2736 | return -2; | |
2737 | /* If pure deletion, scroll up as many lines as possible. | |
2738 | In common case of killing a line, this can save the | |
2739 | following line from being overwritten by scrolling | |
2740 | and therefore having to be redrawn. */ | |
44fa5b1e | 2741 | tem = scroll_frame_lines (f, bp.vpos + top - scroll_amount, |
d1cb44a4 RS |
2742 | top + height - max (0, scroll_amount), |
2743 | scroll_amount, bp.bufpos); | |
d2f84654 RS |
2744 | if (!tem) |
2745 | stop_vpos = height; | |
2746 | else | |
2747 | { | |
2748 | /* scroll_frame_lines did not properly adjust subsequent | |
2749 | lines' charstarts in the case where the text of the | |
2750 | screen line at bp.vpos has changed. | |
2751 | (This can happen in a deletion that ends in mid-line.) | |
8e6208c5 KH |
2752 | To adjust properly, we need to make things consistent |
2753 | at the position ep. | |
d2f84654 RS |
2754 | So do a second adjust to make that happen. |
2755 | Note that stop_vpos >= ep.vpos, so it is sufficient | |
2756 | to update the charstarts for lines at ep.vpos and below. */ | |
2757 | int oldstart | |
2758 | = FRAME_CURRENT_GLYPHS (f)->charstarts[ep.vpos + top][0]; | |
2759 | adjust_window_charstarts (w, ep.vpos + top - 1, | |
2760 | ep.bufpos - oldstart); | |
2761 | } | |
a2889657 JB |
2762 | } |
2763 | else if (scroll_amount) | |
2764 | { | |
2765 | /* If reprinting everything is nearly as fast as scrolling, | |
2766 | don't bother scrolling. Can happen if lines are short. */ | |
2767 | /* Note that if scroll_amount > 0, xp.bufpos - bp.bufpos is an | |
2768 | overestimate of cost of reprinting, since xp.bufpos | |
2769 | would end up below the bottom of the window. */ | |
44fa5b1e | 2770 | if (scroll_cost (f, ep.vpos + top - scroll_amount, |
a2889657 JB |
2771 | top + height - max (0, scroll_amount), |
2772 | scroll_amount) | |
2773 | > xp.bufpos - ep.bufpos - 20) | |
2774 | /* Return "try normal display with same window-start." | |
2775 | Too bad we can't prevent further scroll-thinking. */ | |
2776 | return -2; | |
44fa5b1e | 2777 | tem = scroll_frame_lines (f, ep.vpos + top - scroll_amount, |
a2889657 | 2778 | top + height - max (0, scroll_amount), |
d1cb44a4 | 2779 | scroll_amount, ep.bufpos); |
a2889657 JB |
2780 | if (!tem) stop_vpos = height; |
2781 | } | |
2782 | } | |
2783 | ||
2784 | /* In any case, do not display past bottom of window */ | |
2785 | if (stop_vpos >= height) | |
2786 | { | |
2787 | stop_vpos = height; | |
2788 | scroll_amount = 0; | |
2789 | } | |
2790 | ||
2791 | /* Handle case where pos is before w->start -- | |
2792 | can happen if part of line had been clipped and is not clipped now */ | |
2793 | if (vpos == 0 && pos < marker_position (w->start)) | |
2794 | Fset_marker (w->start, make_number (pos), Qnil); | |
2795 | ||
12adba34 RS |
2796 | val.bytepos = pos_byte; |
2797 | ||
a2889657 JB |
2798 | /* Redisplay the lines where the text was changed */ |
2799 | last_text_vpos = vpos; | |
1c9241f5 KH |
2800 | /* The following code is omitted because we maintain tab offset in |
2801 | val.tab_offset. */ | |
2802 | #if 0 | |
12adba34 | 2803 | tab_offset = pos_tab_offset (w, pos, pos_byte); |
a2889657 JB |
2804 | /* If we are starting display in mid-character, correct tab_offset |
2805 | to account for passing the line that that character really starts in. */ | |
2806 | if (val.hpos < lmargin) | |
2807 | tab_offset += width; | |
1c9241f5 | 2808 | #endif /* 0 */ |
d3413a53 | 2809 | old_tick = MODIFF; |
a2889657 JB |
2810 | while (vpos < stop_vpos) |
2811 | { | |
12adba34 RS |
2812 | val = *display_text_line (w, pos, val.bytepos, top + vpos++, |
2813 | val.hpos, val.tab_offset, | |
0f9c0ff0 | 2814 | val.ovstring_chars_done); |
d3413a53 RS |
2815 | /* If display_text_line ran a hook and changed some text, |
2816 | redisplay all the way to bottom of buffer | |
2817 | So that we show the changes. */ | |
2818 | if (old_tick != MODIFF) | |
2819 | stop_vpos = height; | |
1c9241f5 KH |
2820 | /* The following code is omitted because we maintain tab offset |
2821 | in val.tab_offset. */ | |
2822 | #if 0 | |
a2889657 JB |
2823 | tab_offset += width; |
2824 | if (val.vpos) tab_offset = 0; | |
1c9241f5 | 2825 | #endif |
a2889657 JB |
2826 | if (pos != val.bufpos) |
2827 | last_text_vpos | |
2828 | /* Next line, unless prev line ended in end of buffer with no cr */ | |
1c9241f5 | 2829 | = vpos - (val.vpos && FETCH_BYTE (val.bufpos - 1) != '\n'); |
a2889657 JB |
2830 | pos = val.bufpos; |
2831 | } | |
2832 | ||
2833 | /* There are two cases: | |
2834 | 1) we have displayed down to the bottom of the window | |
2835 | 2) we have scrolled lines below stop_vpos by scroll_amount */ | |
2836 | ||
2837 | if (vpos == height) | |
2838 | { | |
2839 | /* If last line is continued in middle of character, | |
44fa5b1e | 2840 | include the split character in the text considered on the frame */ |
a2889657 JB |
2841 | if (val.hpos < lmargin) |
2842 | val.bufpos++; | |
c2213350 KH |
2843 | XSETFASTINT (w->window_end_vpos, last_text_vpos); |
2844 | XSETFASTINT (w->window_end_pos, Z - val.bufpos); | |
a2889657 JB |
2845 | } |
2846 | ||
2847 | /* If scrolling made blank lines at window bottom, | |
2848 | redisplay to fill those lines */ | |
2849 | if (scroll_amount < 0) | |
2850 | { | |
2851 | /* Don't consider these lines for general-purpose scrolling. | |
2852 | That will save time in the scrolling computation. */ | |
44fa5b1e | 2853 | FRAME_SCROLL_BOTTOM_VPOS (f) = xp.vpos; |
a2889657 JB |
2854 | vpos = xp.vpos; |
2855 | pos = xp.bufpos; | |
12adba34 | 2856 | pos_byte = xp.bytepos; |
1c9241f5 KH |
2857 | val.hpos = xp.hpos; |
2858 | val.tab_offset = xp.tab_offset; | |
a2889657 | 2859 | if (pos == ZV) |
010a899e KH |
2860 | { /* Display from next line */ |
2861 | vpos = height + scroll_amount; | |
2862 | val.hpos = lmargin; | |
2863 | val.tab_offset = 0; | |
2864 | } | |
a2889657 JB |
2865 | else if (xp.contin && xp.hpos != lmargin) |
2866 | { | |
2867 | val.hpos = xp.prevhpos - width + lmargin; | |
1c9241f5 | 2868 | val.tab_offset = xp.tab_offset + bp.prevhpos - width; |
12adba34 | 2869 | pos--; |
0d09d1e6 KH |
2870 | if (multibyte) |
2871 | DEC_POS (pos_byte); | |
2872 | else | |
2873 | pos_byte--; | |
a2889657 JB |
2874 | } |
2875 | ||
2876 | blank_end_of_window = 1; | |
1c9241f5 KH |
2877 | /* The following code is omitted because we maintain tab offset |
2878 | in val.tab_offset. */ | |
2879 | #if 0 | |
12adba34 | 2880 | tab_offset = pos_tab_offset (w, pos, pos_byte); |
a2889657 JB |
2881 | /* If we are starting display in mid-character, correct tab_offset |
2882 | to account for passing the line that that character starts in. */ | |
2883 | if (val.hpos < lmargin) | |
2884 | tab_offset += width; | |
1c9241f5 | 2885 | #endif |
12adba34 | 2886 | val.bytepos = pos; |
a2889657 JB |
2887 | while (vpos < height) |
2888 | { | |
12adba34 RS |
2889 | val = *display_text_line (w, pos, val.bytepos, |
2890 | top + vpos++, val.hpos, | |
1c9241f5 KH |
2891 | val.tab_offset, val.ovstring_chars_done); |
2892 | /* The following code is omitted because we maintain tab | |
2893 | offset in val.tab_offset. */ | |
2894 | #if 0 | |
a2889657 JB |
2895 | tab_offset += width; |
2896 | if (val.vpos) tab_offset = 0; | |
1c9241f5 | 2897 | #endif /* 0 */ |
a2889657 JB |
2898 | pos = val.bufpos; |
2899 | } | |
2900 | ||
2901 | /* Here is a case where display_text_line sets cursor_vpos wrong. | |
2902 | Make it be fixed up, below. */ | |
2903 | if (xp.bufpos == ZV | |
ae3b1442 | 2904 | && xp.bufpos == PT) |
a2889657 JB |
2905 | cursor_vpos = -1; |
2906 | } | |
2907 | ||
44fa5b1e | 2908 | /* If bottom just moved off end of frame, change mode line percentage. */ |
a2889657 JB |
2909 | if (XFASTINT (w->window_end_pos) == 0 |
2910 | && Z != val.bufpos) | |
2911 | w->update_mode_line = Qt; | |
2912 | ||
2913 | /* Attempt to adjust end-of-text positions to new bottom line */ | |
2914 | if (scroll_amount) | |
2915 | { | |
2916 | delta = height - xp.vpos; | |
2917 | if (delta < 0 | |
2918 | || (delta > 0 && xp.bufpos <= ZV) | |
2919 | || (delta == 0 && xp.hpos)) | |
2920 | { | |
210e752f | 2921 | val = *vmotion (Z - XFASTINT (w->window_end_pos), delta, w); |
c2213350 | 2922 | XSETFASTINT (w->window_end_pos, Z - val.bufpos); |
e8e536a9 KH |
2923 | XSETFASTINT (w->window_end_vpos, |
2924 | XFASTINT (w->window_end_vpos) + val.vpos); | |
a2889657 JB |
2925 | } |
2926 | } | |
2927 | ||
2928 | w->window_end_valid = Qnil; | |
2929 | ||
2930 | /* If point was not in a line that was displayed, find it */ | |
2931 | if (cursor_vpos < 0) | |
2932 | { | |
4d641a15 | 2933 | findpoint: |
1c9241f5 KH |
2934 | val = *compute_motion (start, 0, lmargin, 0, PT, |
2935 | /* Don't care for VPOS... */ | |
2936 | 1 << (BITS_PER_SHORT - 1), | |
2937 | /* ... nor HPOS. */ | |
2938 | 1 << (BITS_PER_SHORT - 1), | |
12adba34 RS |
2939 | width, hscroll, |
2940 | pos_tab_offset (w, start, start_byte), | |
2941 | w); | |
44fa5b1e | 2942 | /* Admit failure if point is off frame now */ |
a2889657 JB |
2943 | if (val.vpos >= height) |
2944 | { | |
2945 | for (vpos = 0; vpos < height; vpos++) | |
44fa5b1e | 2946 | cancel_line (vpos + top, f); |
a2889657 JB |
2947 | return 0; |
2948 | } | |
2949 | cursor_vpos = val.vpos + top; | |
73f194f1 | 2950 | cursor_hpos = WINDOW_LEFT_MARGIN (w) + minmax (0, val.hpos, width); |
a2889657 JB |
2951 | } |
2952 | ||
210e752f | 2953 | FRAME_CURSOR_X (f) = cursor_hpos; |
44fa5b1e | 2954 | FRAME_CURSOR_Y (f) = cursor_vpos; |
a2889657 JB |
2955 | |
2956 | if (debug_end_pos) | |
2957 | { | |
ca26e1c8 | 2958 | val = *compute_motion (start, 0, lmargin, 0, ZV, |
68be917d | 2959 | height, - (1 << (BITS_PER_SHORT - 1)), |
12adba34 RS |
2960 | width, hscroll, |
2961 | pos_tab_offset (w, start, start_byte), | |
2962 | w); | |
a2889657 JB |
2963 | if (val.vpos != XFASTINT (w->window_end_vpos)) |
2964 | abort (); | |
2965 | if (XFASTINT (w->window_end_pos) | |
2966 | != Z - val.bufpos) | |
2967 | abort (); | |
2968 | } | |
2969 | ||
2970 | return 1; | |
2971 | } | |
2972 | \f | |
278feba9 | 2973 | /* Copy LEN glyphs starting address FROM to the rope TO. |
f7430cb6 | 2974 | But don't actually copy the parts that would come in before S. |
278feba9 RS |
2975 | Value is TO, advanced past the copied data. |
2976 | F is the frame we are displaying in. */ | |
a2889657 | 2977 | |
278feba9 RS |
2978 | static GLYPH * |
2979 | copy_part_of_rope (f, to, s, from, len, face) | |
2980 | FRAME_PTR f; | |
2981 | register GLYPH *to; /* Copy to here. */ | |
a2889657 | 2982 | register GLYPH *s; /* Starting point. */ |
278feba9 RS |
2983 | Lisp_Object *from; /* Data to copy. */ |
2984 | int len; | |
1c2250c2 | 2985 | int face; /* Face to apply to glyphs which don't specify one. */ |
a2889657 | 2986 | { |
278feba9 RS |
2987 | int n = len; |
2988 | register Lisp_Object *fp = from; | |
2989 | /* These cache the results of the last call to compute_glyph_face. */ | |
2990 | int last_code = -1; | |
2991 | int last_merged = 0; | |
c581d710 | 2992 | |
87485d6f | 2993 | #ifdef HAVE_FACES |
4cdc65eb KH |
2994 | if (! FRAME_TERMCAP_P (f)) |
2995 | while (n--) | |
2996 | { | |
e57bca5d | 2997 | GLYPH glyph = (INTEGERP (*fp) ? XFASTINT (*fp) : 0); |
4cdc65eb | 2998 | int facecode; |
e57bca5d KH |
2999 | unsigned int c = FAST_GLYPH_CHAR (glyph); |
3000 | ||
3001 | if (c > MAX_CHAR) | |
3002 | /* For an invalid character code, use space. */ | |
3003 | c = ' '; | |
4cdc65eb KH |
3004 | |
3005 | if (FAST_GLYPH_FACE (glyph) == 0) | |
3006 | /* If GLYPH has no face code, use FACE. */ | |
3007 | facecode = face; | |
3008 | else if (FAST_GLYPH_FACE (glyph) == last_code) | |
3009 | /* If it's same as previous glyph, use same result. */ | |
3010 | facecode = last_merged; | |
3011 | else | |
3012 | { | |
3013 | /* Merge this glyph's face and remember the result. */ | |
3014 | last_code = FAST_GLYPH_FACE (glyph); | |
3015 | last_merged = facecode = compute_glyph_face (f, last_code, face); | |
3016 | } | |
b2a76982 | 3017 | |
4cdc65eb | 3018 | if (to >= s) |
e57bca5d | 3019 | *to = FAST_MAKE_GLYPH (c, facecode); |
4cdc65eb KH |
3020 | ++to; |
3021 | ++fp; | |
3022 | } | |
3023 | else | |
3024 | #endif | |
3025 | while (n--) | |
3026 | { | |
dedd1182 | 3027 | if (to >= s) *to = (INTEGERP (*fp) ? XFASTINT (*fp) : 0); |
4cdc65eb KH |
3028 | ++to; |
3029 | ++fp; | |
3030 | } | |
278feba9 | 3031 | return to; |
c581d710 RS |
3032 | } |
3033 | ||
278feba9 RS |
3034 | /* Correct a glyph by replacing its specified user-level face code |
3035 | with a displayable computed face code. */ | |
c581d710 | 3036 | |
278feba9 | 3037 | static GLYPH |
659a218f | 3038 | fix_glyph (f, glyph, cface) |
278feba9 RS |
3039 | FRAME_PTR f; |
3040 | GLYPH glyph; | |
659a218f | 3041 | int cface; |
c581d710 | 3042 | { |
87485d6f | 3043 | #ifdef HAVE_FACES |
659a218f KH |
3044 | if (! FRAME_TERMCAP_P (f)) |
3045 | { | |
3046 | if (FAST_GLYPH_FACE (glyph) != 0) | |
3047 | cface = compute_glyph_face (f, FAST_GLYPH_FACE (glyph), cface); | |
3048 | glyph = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (glyph), cface); | |
3049 | } | |
4cdc65eb KH |
3050 | #endif |
3051 | return glyph; | |
a2889657 JB |
3052 | } |
3053 | \f | |
12adba34 RS |
3054 | /* Return the column of position POS / POS_BYTE in window W's buffer. |
3055 | The result is rounded down to a multiple of the internal width of W. | |
3056 | This is the amount of indentation of position POS | |
3057 | that is not visible in its horizontal position in the window. */ | |
3058 | ||
3059 | static int | |
3060 | pos_tab_offset (w, pos, pos_byte) | |
3061 | struct window *w; | |
3062 | register int pos, pos_byte; | |
3063 | { | |
3064 | int opoint = PT; | |
3065 | int opoint_byte = PT_BYTE; | |
3066 | int col; | |
3067 | int width = window_internal_width (w) - 1; | |
3068 | ||
3069 | if (pos == BEGV) | |
3070 | return MINI_WINDOW_P (w) ? -minibuf_prompt_width : 0; | |
3071 | ||
3072 | if (FETCH_BYTE (pos_byte - 1) == '\n') | |
3073 | return 0; | |
3074 | ||
3075 | TEMP_SET_PT_BOTH (pos, pos_byte); | |
3076 | col = current_column (); | |
3077 | TEMP_SET_PT_BOTH (opoint, opoint_byte); | |
3078 | ||
3079 | return col; | |
3080 | } | |
3081 | \f\f | |
3082 | /* Display one line of window W, starting at char position START in W's buffer. | |
3083 | START_BYTE is the corresponding byte position. | |
f4faa47c JB |
3084 | |
3085 | Display starting at horizontal position HPOS, expressed relative to | |
3086 | W's left edge. In situations where the text at START shouldn't | |
3087 | start at the left margin (i.e. when the window is hscrolled, or | |
3088 | we're continuing a line which left off in the midst of a | |
3089 | multi-column character), HPOS should be negative; we throw away | |
3090 | characters up 'til hpos = 0. So, HPOS must take hscrolling into | |
3091 | account. | |
a2889657 JB |
3092 | |
3093 | TABOFFSET is an offset for ostensible hpos, used in tab stop calculations. | |
3094 | ||
0f9c0ff0 RS |
3095 | OVSTR_DONE is the number of chars of overlay before/after strings |
3096 | at this position which have already been processed. | |
3097 | ||
f4faa47c JB |
3098 | Display on position VPOS on the frame. It is origin 0, relative to |
3099 | the top of the frame, not W. | |
a2889657 JB |
3100 | |
3101 | Returns a STRUCT POSITION giving character to start next line with | |
3102 | and where to display it, including a zero or negative hpos. | |
3103 | The vpos field is not really a vpos; it is 1 unless the line is continued */ | |
3104 | ||
3105 | struct position val_display_text_line; | |
3106 | ||
3107 | static struct position * | |
12adba34 | 3108 | display_text_line (w, start, start_byte, vpos, hpos, taboffset, ovstr_done) |
a2889657 JB |
3109 | struct window *w; |
3110 | int start; | |
3111 | int vpos; | |
3112 | int hpos; | |
3113 | int taboffset; | |
0f9c0ff0 | 3114 | int ovstr_done; |
a2889657 JB |
3115 | { |
3116 | register int pos = start; | |
12adba34 | 3117 | int pos_byte = start_byte; |
a2889657 JB |
3118 | register int c; |
3119 | register GLYPH *p1; | |
12adba34 | 3120 | int pause, limit_byte; |
a2889657 JB |
3121 | register unsigned char *p; |
3122 | GLYPH *endp; | |
d2f84654 | 3123 | register GLYPH *leftmargin; |
ca26e1c8 | 3124 | register GLYPH *p1prev; |
efc63ef0 | 3125 | register GLYPH *p1start; |
0d09d1e6 | 3126 | GLYPH *p1_wide_column_end = (GLYPH *) 0; |
12adba34 | 3127 | int prevpos, prevpos_byte; |
efc63ef0 | 3128 | int *charstart; |
44fa5b1e | 3129 | FRAME_PTR f = XFRAME (w->frame); |
a2889657 | 3130 | int tab_width = XINT (current_buffer->tab_width); |
265a9e55 | 3131 | int ctl_arrow = !NILP (current_buffer->ctl_arrow); |
b1d1124b | 3132 | int width = window_internal_width (w) - 1; |
a2889657 | 3133 | struct position val; |
12adba34 | 3134 | int lastpos, lastpos_byte; |
a2889657 | 3135 | int invis; |
642eefc6 RS |
3136 | int last_invis_skip = 0; |
3137 | Lisp_Object last_invis_prop; | |
a2889657 | 3138 | int hscroll = XINT (w->hscroll); |
d2f84654 RS |
3139 | int truncate = (hscroll |
3140 | || (truncate_partial_width_windows | |
73f194f1 | 3141 | && !WINDOW_FULL_WIDTH_P (w)) |
d2f84654 | 3142 | || !NILP (current_buffer->truncate_lines)); |
bd66d1ba | 3143 | |
409bb864 | 3144 | /* 1 if this buffer has a region to highlight. */ |
bd66d1ba | 3145 | int highlight_region |
2bf32c5d | 3146 | = (!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active) |
409bb864 | 3147 | && XMARKER (current_buffer->mark)->buffer != 0); |
bd66d1ba RS |
3148 | int region_beg, region_end; |
3149 | ||
e24c997d KH |
3150 | int selective = (INTEGERP (current_buffer->selective_display) |
3151 | ? XINT (current_buffer->selective_display) | |
3152 | : !NILP (current_buffer->selective_display) ? -1 : 0); | |
44fa5b1e | 3153 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (f); |
f908610f | 3154 | register struct Lisp_Char_Table *dp = window_display_table (w); |
68a37fa8 RS |
3155 | |
3156 | Lisp_Object default_invis_vector[3]; | |
642eefc6 RS |
3157 | /* Number of characters of ellipsis to display after an invisible line |
3158 | if it calls for an ellipsis. | |
3159 | Note that this value can be nonzero regardless of whether | |
3160 | selective display is enabled--you must check that separately. */ | |
a2889657 | 3161 | int selective_rlen |
642eefc6 | 3162 | = (dp && VECTORP (DISP_INVIS_VECTOR (dp)) |
68a37fa8 | 3163 | ? XVECTOR (DISP_INVIS_VECTOR (dp))->size |
642eefc6 | 3164 | : !NILP (current_buffer->selective_display_ellipses) ? 3 : 0); |
68a37fa8 RS |
3165 | /* This is the sequence of Lisp objects to display |
3166 | when there are invisible lines. */ | |
3167 | Lisp_Object *invis_vector_contents | |
e24c997d | 3168 | = (dp && VECTORP (DISP_INVIS_VECTOR (dp)) |
68a37fa8 RS |
3169 | ? XVECTOR (DISP_INVIS_VECTOR (dp))->contents |
3170 | : default_invis_vector); | |
3171 | ||
e24c997d | 3172 | GLYPH truncator = (dp == 0 || !INTEGERP (DISP_TRUNC_GLYPH (dp)) |
e57bca5d | 3173 | || !GLYPH_CHAR_VALID_P (XINT (DISP_TRUNC_GLYPH (dp))) |
278feba9 | 3174 | ? '$' : XINT (DISP_TRUNC_GLYPH (dp))); |
e24c997d | 3175 | GLYPH continuer = (dp == 0 || !INTEGERP (DISP_CONTINUE_GLYPH (dp)) |
e57bca5d | 3176 | || !GLYPH_CHAR_VALID_P (XINT (DISP_CONTINUE_GLYPH (dp))) |
278feba9 | 3177 | ? '\\' : XINT (DISP_CONTINUE_GLYPH (dp))); |
a2889657 | 3178 | |
1c9241f5 KH |
3179 | /* If 1, we must handle multibyte characters. */ |
3180 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); | |
3181 | /* Length of multibyte form of each character. */ | |
3182 | int len; | |
3183 | /* Glyphs generated should be set this bit mask if text must be | |
3184 | displayed from right to left. */ | |
3185 | GLYPH rev_dir_bit = (NILP (current_buffer->direction_reversed) | |
3186 | ? 0 : GLYPH_MASK_REV_DIR); | |
3187 | ||
31b24551 JB |
3188 | /* The next buffer location at which the face should change, due |
3189 | to overlays or text property changes. */ | |
3190 | int next_face_change; | |
3191 | ||
ca26e1c8 KH |
3192 | /* The next location where the `invisible' property changes, or an |
3193 | overlay starts or ends. */ | |
3194 | int next_boundary; | |
3195 | ||
31b24551 | 3196 | /* The face we're currently using. */ |
1c2250c2 | 3197 | int current_face = 0; |
efc63ef0 | 3198 | int i; |
31b24551 | 3199 | |
c2213350 | 3200 | XSETFASTINT (default_invis_vector[2], '.'); |
68a37fa8 RS |
3201 | default_invis_vector[0] = default_invis_vector[1] = default_invis_vector[2]; |
3202 | ||
73f194f1 | 3203 | get_display_line (f, vpos, WINDOW_LEFT_MARGIN (w)); |
54ff581a | 3204 | if (tab_width <= 0 || tab_width > 1000) tab_width = 8; |
a2889657 | 3205 | |
bd66d1ba | 3206 | /* Show where to highlight the region. */ |
409bb864 | 3207 | if (highlight_region |
fba9ce76 RS |
3208 | /* Maybe highlight only in selected window. */ |
3209 | && (highlight_nonselected_windows | |
409bb864 KH |
3210 | || w == XWINDOW (selected_window) |
3211 | || (MINI_WINDOW_P (XWINDOW (selected_window)) | |
3212 | && w == XWINDOW (Vminibuf_scroll_window)))) | |
bd66d1ba RS |
3213 | { |
3214 | region_beg = marker_position (current_buffer->mark); | |
3215 | if (PT < region_beg) | |
3216 | { | |
3217 | region_end = region_beg; | |
3218 | region_beg = PT; | |
3219 | } | |
3220 | else | |
3221 | region_end = PT; | |
3222 | w->region_showing = Qt; | |
3223 | } | |
3224 | else | |
3ee4159a RS |
3225 | { |
3226 | region_beg = region_end = -1; | |
3227 | w->region_showing = Qnil; | |
3228 | } | |
bd66d1ba | 3229 | |
f4faa47c | 3230 | if (MINI_WINDOW_P (w) |
ca26e1c8 | 3231 | && start == BEG |
a2889657 JB |
3232 | && vpos == XFASTINT (w->top)) |
3233 | { | |
8c5b6a0a | 3234 | if (! NILP (minibuf_prompt)) |
f7b4b63a | 3235 | { |
12a274bf RS |
3236 | int old_width = minibuf_prompt_width; |
3237 | ||
f7b4b63a | 3238 | minibuf_prompt_width |
8c5b6a0a | 3239 | = (display_string (w, vpos, XSTRING (minibuf_prompt)->data, |
0a9dc68b | 3240 | XSTRING (minibuf_prompt)->size_byte, |
377dbd97 | 3241 | hpos + WINDOW_LEFT_MARGIN (w), |
ce006f69 RS |
3242 | /* Display a space if we truncate. */ |
3243 | ' ', | |
3244 | 1, -1, | |
3245 | /* Truncate the prompt a little before the | |
3246 | margin, so user input can at least start | |
3247 | on the first line. */ | |
8bb6ca14 | 3248 | (XFASTINT (w->width) > 10 |
a3788d53 | 3249 | ? XFASTINT (w->width) - 4 : -1), |
0a9dc68b | 3250 | STRING_MULTIBYTE (minibuf_prompt)) |
377dbd97 | 3251 | - hpos - WINDOW_LEFT_MARGIN (w)); |
f7b4b63a | 3252 | hpos += minibuf_prompt_width; |
12a274bf | 3253 | taboffset -= minibuf_prompt_width - old_width; |
f7b4b63a KH |
3254 | } |
3255 | else | |
3256 | minibuf_prompt_width = 0; | |
a2889657 JB |
3257 | } |
3258 | ||
f4faa47c JB |
3259 | /* If we're hscrolled at all, use compute_motion to skip over any |
3260 | text off the left edge of the window. compute_motion may know | |
3261 | tricks to do this faster than we can. */ | |
3262 | if (hpos < 0) | |
3263 | { | |
3264 | struct position *left_edge | |
ca26e1c8 KH |
3265 | = compute_motion (pos, vpos, hpos, 0, |
3266 | ZV, vpos, 0, | |
f4faa47c JB |
3267 | width, hscroll, taboffset, w); |
3268 | ||
3269 | /* Retrieve the buffer position and column provided by | |
3270 | compute_motion. We can't assume that the column will be | |
3271 | zero, because you may have multi-column characters crossing | |
3272 | the left margin. | |
3273 | ||
3274 | compute_motion may have moved us past the screen position we | |
3275 | requested, if we hit a multi-column character, or the end of | |
3276 | the line. If so, back up. */ | |
3277 | if (left_edge->vpos > vpos | |
3278 | || left_edge->hpos > 0) | |
3279 | { | |
0d09d1e6 KH |
3280 | pos = left_edge->bufpos - 1; |
3281 | pos_byte = left_edge->bytepos; | |
3282 | if (multibyte) | |
3283 | DEC_POS (pos_byte); | |
3284 | else | |
3285 | pos_byte--; | |
f4faa47c JB |
3286 | hpos = left_edge->prevhpos; |
3287 | } | |
3288 | else | |
3289 | { | |
3290 | pos = left_edge->bufpos; | |
12adba34 | 3291 | pos_byte = left_edge->bytepos; |
f4faa47c JB |
3292 | hpos = left_edge->hpos; |
3293 | } | |
3294 | } | |
3295 | ||
377dbd97 RS |
3296 | hpos += WINDOW_LEFT_MARGIN (w); |
3297 | ||
f4faa47c | 3298 | desired_glyphs->bufp[vpos] = start; |
a2889657 | 3299 | p1 = desired_glyphs->glyphs[vpos] + hpos; |
efc63ef0 RS |
3300 | p1start = p1; |
3301 | charstart = desired_glyphs->charstarts[vpos] + hpos; | |
3302 | /* In case we don't ever write anything into it... */ | |
73f194f1 RS |
3303 | desired_glyphs->charstarts[vpos][WINDOW_LEFT_MARGIN (w)] = -1; |
3304 | leftmargin = desired_glyphs->glyphs[vpos] + WINDOW_LEFT_MARGIN (w); | |
d2f84654 | 3305 | endp = leftmargin + width; |
a2889657 | 3306 | |
1c2250c2 JB |
3307 | /* Arrange the overlays nicely for our purposes. Usually, we call |
3308 | display_text_line on only one line at a time, in which case this | |
3309 | can't really hurt too much, or we call it on lines which appear | |
3310 | one after another in the buffer, in which case all calls to | |
3311 | recenter_overlay_lists but the first will be pretty cheap. */ | |
3312 | recenter_overlay_lists (current_buffer, pos); | |
3313 | ||
a2889657 JB |
3314 | /* Loop generating characters. |
3315 | Stop at end of buffer, before newline, | |
31b24551 JB |
3316 | if reach or pass continuation column, |
3317 | or at face change. */ | |
a2889657 | 3318 | pause = pos; |
12adba34 | 3319 | limit_byte = pos_byte; |
31b24551 | 3320 | next_face_change = pos; |
ca26e1c8 KH |
3321 | next_boundary = pos; |
3322 | p1prev = p1; | |
3323 | prevpos = pos; | |
12adba34 | 3324 | prevpos_byte = pos_byte; |
1fca3fae RS |
3325 | |
3326 | /* If the window is hscrolled and point is in the invisible part of the | |
3327 | current line beyond the left margin we can record the cursor location | |
3328 | right away. */ | |
3329 | if (hscroll && start <= PT && PT < pos && cursor_vpos < 0) | |
3330 | { | |
3331 | cursor_vpos = vpos; | |
3332 | cursor_hpos = p1 - leftmargin; | |
3333 | } | |
3334 | ||
2384c010 | 3335 | while (p1 < endp) |
a2889657 | 3336 | { |
0d09d1e6 KH |
3337 | int eat_following_binary_data; |
3338 | ||
31b24551 | 3339 | if (pos >= pause) |
a2889657 | 3340 | { |
67481ae5 RS |
3341 | int e_t_h; |
3342 | ||
ca26e1c8 | 3343 | while (pos == next_boundary) |
a2889657 | 3344 | { |
ca26e1c8 KH |
3345 | Lisp_Object position, limit, prop, ww; |
3346 | ||
3347 | /* Display the overlay strings here, unless we're at ZV | |
3348 | and have already displayed the appropriate strings | |
3349 | on an earlier line. */ | |
3350 | if (pos < ZV || !zv_strings_seen++) | |
3351 | { | |
3352 | int ovlen; | |
b4222ffa | 3353 | unsigned char *ovstr; |
ca26e1c8 | 3354 | ovlen = overlay_strings (pos, w, &ovstr); |
0f9c0ff0 RS |
3355 | |
3356 | if (ovlen > 0) | |
ca26e1c8 | 3357 | { |
0f9c0ff0 RS |
3358 | /* Skip the ones we did in a previous line. */ |
3359 | ovstr += ovstr_done; | |
3360 | ovlen -= ovstr_done; | |
3361 | ||
1c9241f5 | 3362 | while (ovlen > 0) |
0f9c0ff0 | 3363 | { |
1c9241f5 KH |
3364 | int charset, cols; |
3365 | GLYPH g; | |
3366 | ||
3367 | if (multibyte) | |
3368 | { | |
3369 | c = STRING_CHAR_AND_LENGTH (ovstr, ovlen, len); | |
3370 | ovstr += len, ovlen -= len, ovstr_done += len; | |
3371 | charset = CHAR_CHARSET (c); | |
3372 | cols = (charset == CHARSET_COMPOSITION | |
3373 | ? cmpchar_table[COMPOSITE_CHAR_ID (c)]->width | |
3374 | : CHARSET_WIDTH (charset)); | |
3375 | } | |
3376 | else | |
3377 | { | |
3378 | c = *ovstr++, ovlen--, ovstr_done++; | |
3379 | cols = 1; | |
3380 | } | |
3381 | g = MAKE_GLYPH (f, c, current_face) | rev_dir_bit; | |
3382 | while (cols-- > 0) | |
3383 | { | |
3384 | if (p1 >= leftmargin && p1 < endp) | |
3385 | *p1 = g, g |= GLYPH_MASK_PADDING; | |
3386 | p1++; | |
3387 | } | |
0f9c0ff0 RS |
3388 | } |
3389 | /* If we did all the overlay strings | |
3390 | and we have room for text, clear ovstr_done | |
3391 | just for neatness' sake. */ | |
3392 | if (ovlen == 0 && p1 < endp) | |
3393 | ovstr_done = 0; | |
ca26e1c8 KH |
3394 | } |
3395 | } | |
3396 | ||
3397 | /* Did we reach point? Record the cursor location. */ | |
3398 | if (pos == PT && cursor_vpos < 0) | |
3399 | { | |
3400 | cursor_vpos = vpos; | |
3401 | cursor_hpos = p1 - leftmargin; | |
3402 | } | |
3403 | ||
3404 | if (pos >= ZV) | |
3405 | break; | |
a2889657 | 3406 | |
c2213350 | 3407 | XSETFASTINT (position, pos); |
ca26e1c8 KH |
3408 | limit = Fnext_overlay_change (position); |
3409 | #ifdef USE_TEXT_PROPERTIES | |
dfabd9a0 RS |
3410 | /* This is just an estimate to give reasonable |
3411 | performance; nothing should go wrong if it is too small. */ | |
fe3d6921 | 3412 | if (XFASTINT (limit) > pos + 50) |
1c9241f5 KH |
3413 | { |
3414 | int limitpos = pos + 50; | |
1c9241f5 KH |
3415 | XSETFASTINT (limit, limitpos); |
3416 | } | |
ca26e1c8 KH |
3417 | limit = Fnext_single_property_change (position, Qinvisible, |
3418 | Fcurrent_buffer (), limit); | |
3419 | #endif | |
3420 | next_boundary = XFASTINT (limit); | |
3421 | /* if the `invisible' property is set, we can skip to | |
3422 | the next property change. */ | |
3423 | XSETWINDOW (ww, w); | |
3424 | prop = Fget_char_property (position, Qinvisible, ww); | |
642eefc6 | 3425 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) |
dfabd9a0 | 3426 | { |
ca26e1c8 | 3427 | if (pos < PT && next_boundary >= PT) |
dfabd9a0 RS |
3428 | { |
3429 | cursor_vpos = vpos; | |
d2f84654 | 3430 | cursor_hpos = p1 - leftmargin; |
dfabd9a0 | 3431 | } |
ca26e1c8 | 3432 | pos = next_boundary; |
f6e7abc1 | 3433 | pos_byte = CHAR_TO_BYTE (pos); |
642eefc6 RS |
3434 | last_invis_skip = pos; |
3435 | last_invis_prop = prop; | |
dfabd9a0 | 3436 | } |
b0a0fbda | 3437 | } |
ca26e1c8 KH |
3438 | |
3439 | /* Did we reach point? Record the cursor location. */ | |
3440 | if (pos == PT && cursor_vpos < 0) | |
3441 | { | |
3442 | cursor_vpos = vpos; | |
3443 | cursor_hpos = p1 - leftmargin; | |
3444 | } | |
3445 | ||
3446 | /* Did we hit the end of the visible region of the buffer? | |
3447 | Stop here. */ | |
3448 | if (pos >= ZV) | |
eff87c2c RS |
3449 | { |
3450 | /* Update charstarts for the end of this line. */ | |
3451 | /* Do nothing if off the left edge or at the right edge. */ | |
3452 | if (p1 >= leftmargin && p1 + 1 != endp) | |
3453 | { | |
3454 | int *p2x = &charstart[(p1 < leftmargin | |
3455 | ? leftmargin : p1) | |
3456 | - p1start]; | |
3457 | *p2x++ = pos; | |
3458 | } | |
3459 | break; | |
3460 | } | |
b0a0fbda | 3461 | |
67481ae5 RS |
3462 | /* Figure out where (if at all) the |
3463 | redisplay_end_trigger-hook should run. */ | |
f6fd109b RS |
3464 | if (MARKERP (w->redisplay_end_trigger) |
3465 | && XMARKER (w->redisplay_end_trigger)->buffer != 0) | |
d3413a53 RS |
3466 | e_t_h = marker_position (w->redisplay_end_trigger); |
3467 | else if (INTEGERP (w->redisplay_end_trigger)) | |
3468 | e_t_h = XINT (w->redisplay_end_trigger); | |
67481ae5 RS |
3469 | else |
3470 | e_t_h = ZV; | |
3471 | ||
3472 | /* If we've gone past the place to run a hook, | |
3473 | run the hook. */ | |
3474 | if (pos >= e_t_h && e_t_h != ZV) | |
3475 | { | |
e0bfbde6 RS |
3476 | Lisp_Object args[3]; |
3477 | ||
3478 | args[0] = Qredisplay_end_trigger_functions; | |
3479 | XSETWINDOW (args[1], w); | |
3480 | XSETINT (args[2], e_t_h); | |
e0bfbde6 | 3481 | |
9c49d3d7 KH |
3482 | /* Since we are *trying* to run these functions, |
3483 | don't try to run them again, even if they get an error. */ | |
d3413a53 | 3484 | w->redisplay_end_trigger = Qnil; |
9c49d3d7 KH |
3485 | Frun_hook_with_args (3, args); |
3486 | ||
67481ae5 | 3487 | e_t_h = ZV; |
f6fd109b RS |
3488 | /* Notice if it changed the face of this character. */ |
3489 | next_face_change = pos; | |
67481ae5 RS |
3490 | } |
3491 | ||
f6fd109b RS |
3492 | #ifdef HAVE_FACES |
3493 | /* Did we hit a face change? Figure out what face we should | |
3494 | use now. We also hit this the first time through the | |
3495 | loop, to see what face we should start with. */ | |
ab6ce60e RS |
3496 | if (pos >= next_face_change |
3497 | && (FRAME_WINDOW_P (f) || FRAME_MSDOS_P (f))) | |
1c9241f5 KH |
3498 | { |
3499 | int limit = pos + 50; | |
3500 | ||
1c9241f5 KH |
3501 | current_face = compute_char_face (f, w, pos, |
3502 | region_beg, region_end, | |
3503 | &next_face_change, limit, 0); | |
3504 | } | |
f6fd109b RS |
3505 | #endif |
3506 | ||
67481ae5 RS |
3507 | /* Compute the next place we need to stop |
3508 | and do something special; set PAUSE. */ | |
3509 | ||
ca26e1c8 | 3510 | pause = ZV; |
1c2250c2 | 3511 | |
ca26e1c8 KH |
3512 | if (pos < next_boundary && next_boundary < pause) |
3513 | pause = next_boundary; | |
1c2250c2 JB |
3514 | if (pos < next_face_change && next_face_change < pause) |
3515 | pause = next_face_change; | |
3516 | ||
67481ae5 RS |
3517 | if (e_t_h < pause) |
3518 | pause = e_t_h; | |
3519 | ||
31b24551 JB |
3520 | /* Wouldn't you hate to read the next line to someone over |
3521 | the phone? */ | |
ae3b1442 KH |
3522 | if (pos < PT && PT < pause) |
3523 | pause = PT; | |
a2889657 JB |
3524 | if (pos < GPT && GPT < pause) |
3525 | pause = GPT; | |
3526 | ||
12adba34 RS |
3527 | /* LIMIT_BYTE is not the same place in the buffer as PAUSE. |
3528 | It is a limit on valid characters. | |
3529 | We use it to bound STRING_CHAR_AND_LENGTH. */ | |
3530 | limit_byte = ZV_BYTE; | |
3531 | if (pos < GPT && GPT_BYTE < limit_byte) | |
3532 | limit_byte = GPT_BYTE; | |
3533 | ||
3534 | { | |
3535 | int temp = CHAR_TO_BYTE (pos); | |
3536 | p = BYTE_POS_ADDR (temp); | |
3537 | } | |
a2889657 | 3538 | } |
ca26e1c8 | 3539 | |
ca26e1c8 KH |
3540 | if (p1 >= endp) |
3541 | break; | |
3542 | ||
3543 | p1prev = p1; | |
0d09d1e6 | 3544 | p1_wide_column_end = (GLYPH *) 0; |
ca26e1c8 | 3545 | |
1c9241f5 | 3546 | if (multibyte) |
12adba34 | 3547 | c = STRING_CHAR_AND_LENGTH (p, limit_byte - pos_byte, len), p += len; |
1c9241f5 KH |
3548 | else |
3549 | c = *p++, len = 1; | |
376b0e59 RS |
3550 | /* Let a display table override all standard display methods. */ |
3551 | if (dp != 0 && VECTORP (DISP_CHAR_VECTOR (dp, c))) | |
3552 | { | |
3553 | p1 = copy_part_of_rope (f, p1, leftmargin, | |
3554 | XVECTOR (DISP_CHAR_VECTOR (dp, c))->contents, | |
3555 | XVECTOR (DISP_CHAR_VECTOR (dp, c))->size, | |
1c9241f5 | 3556 | current_face, rev_dir_bit); |
376b0e59 RS |
3557 | } |
3558 | else if (c >= 040 && c < 0177) | |
a2889657 | 3559 | { |
d2f84654 | 3560 | if (p1 >= leftmargin) |
1c9241f5 | 3561 | *p1 = MAKE_GLYPH (f, c, current_face) | rev_dir_bit; |
a2889657 JB |
3562 | p1++; |
3563 | } | |
3564 | else if (c == '\n') | |
3565 | { | |
1842fc1a RS |
3566 | #if 0 |
3567 | /* Same as p1prev, but after the invis_vector_contents text | |
3568 | (if we have that on this line). */ | |
3569 | GLYPH *p1prev_modified; | |
3570 | #endif | |
3571 | ||
a2889657 | 3572 | invis = 0; |
642eefc6 RS |
3573 | if (last_invis_skip == pos |
3574 | && TEXT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS (last_invis_prop)) | |
3575 | invis = 1; | |
ca26e1c8 | 3576 | while (pos + 1 < ZV |
a2889657 | 3577 | && selective > 0 |
12adba34 | 3578 | && indented_beyond_p (pos + 1, pos_byte + 1, selective)) |
a2889657 | 3579 | { |
12adba34 RS |
3580 | int opoint = PT, opoint_byte = PT_BYTE; |
3581 | ||
a2889657 | 3582 | invis = 1; |
9ce37c9d | 3583 | INC_BOTH (pos, pos_byte); |
12adba34 RS |
3584 | scan_newline (pos, pos_byte, ZV, ZV_BYTE, 1, 1); |
3585 | if (FETCH_BYTE (pos_byte - 1) == '\n') | |
3586 | { | |
3587 | pos--; | |
3588 | pos_byte--; | |
3589 | } | |
3590 | SET_PT_BOTH (opoint, opoint_byte); | |
a2889657 | 3591 | } |
d2f84654 | 3592 | if (invis && selective_rlen > 0 && p1 >= leftmargin) |
a2889657 | 3593 | { |
1842fc1a RS |
3594 | #if 0 |
3595 | GLYPH *cs, *csend; | |
3596 | ||
3597 | cs = charstart + (p1 - p1start); | |
3598 | #endif | |
3599 | ||
a2889657 | 3600 | p1 += selective_rlen; |
d2f84654 | 3601 | if (p1 - leftmargin > width) |
a2889657 | 3602 | p1 = endp; |
1842fc1a RS |
3603 | |
3604 | #if 0 /* This needs more work; charstarts needs to record | |
3605 | both whether a position ho;ds an ellipsis character | |
3606 | and what buffer position it corresponds to. */ | |
3607 | csend = charstart + (p1 - p1start); | |
3608 | while (cs != csend) | |
3609 | *cs++ = -2; | |
3610 | /* The idea is to use p1prev_modified instead of p1prev | |
3611 | in the loop below over p2x. */ | |
3612 | p1prev_modified = p1; | |
3613 | #endif | |
3614 | ||
278feba9 | 3615 | copy_part_of_rope (f, p1prev, p1prev, invis_vector_contents, |
1c9241f5 | 3616 | (p1 - p1prev), current_face, rev_dir_bit); |
a2889657 | 3617 | } |
545e04f6 KH |
3618 | |
3619 | /* Update charstarts for the newline that ended this line. */ | |
3620 | /* Do nothing here for a char that's entirely off the left edge | |
3621 | or if it starts at the right edge. */ | |
3622 | if (p1 >= leftmargin && p1prev != endp) | |
3623 | { | |
3624 | /* Store the newline's position into charstarts | |
3625 | for the column where the newline starts. | |
3626 | Store -1 for the rest of the glyphs it occupies. */ | |
3627 | int *p2x = &charstart[(p1prev < leftmargin | |
3628 | ? leftmargin : p1prev) | |
3629 | - p1start]; | |
3630 | int *p2 = &charstart[(p1 < endp ? p1 : endp) - p1start]; | |
3631 | ||
3632 | *p2x++ = pos; | |
3633 | while (p2x < p2) | |
3634 | *p2x++ = -1; | |
3635 | } | |
1842fc1a RS |
3636 | #ifdef HAVE_FACES |
3637 | /* Draw the face of the newline character as extending all the | |
3638 | way to the end of the frame line. */ | |
3639 | if (current_face) | |
3640 | { | |
3641 | if (p1 < leftmargin) | |
3642 | p1 = leftmargin; | |
3643 | while (p1 < endp) | |
3644 | *p1++ = FAST_MAKE_GLYPH (' ', current_face) | rev_dir_bit; | |
3645 | } | |
3646 | #endif | |
545e04f6 | 3647 | |
68a37fa8 | 3648 | break; |
a2889657 JB |
3649 | } |
3650 | else if (c == '\t') | |
3651 | { | |
3652 | do | |
3653 | { | |
d2f84654 | 3654 | if (p1 >= leftmargin && p1 < endp) |
1c9241f5 | 3655 | *p1 = MAKE_GLYPH (f, ' ', current_face) | rev_dir_bit; |
a2889657 JB |
3656 | p1++; |
3657 | } | |
d2f84654 | 3658 | while ((p1 - leftmargin + taboffset + hscroll - (hscroll > 0)) |
a2889657 JB |
3659 | % tab_width); |
3660 | } | |
6e8290aa | 3661 | else if (c == Ctl ('M') && selective == -1) |
a2889657 | 3662 | { |
12adba34 RS |
3663 | int opoint = PT, opoint_byte = PT_BYTE; |
3664 | scan_newline (pos, pos_byte, ZV, ZV_BYTE, 1, 1); | |
3665 | pos = PT, pos_byte = PT_BYTE; | |
3666 | SET_PT_BOTH (opoint, opoint_byte); | |
3667 | ||
3668 | if (FETCH_BYTE (pos_byte - 1) == '\n') | |
3669 | pos--, pos_byte--; | |
a2889657 JB |
3670 | if (selective_rlen > 0) |
3671 | { | |
3672 | p1 += selective_rlen; | |
d2f84654 | 3673 | if (p1 - leftmargin > width) |
a2889657 | 3674 | p1 = endp; |
278feba9 | 3675 | copy_part_of_rope (f, p1prev, p1prev, invis_vector_contents, |
1c9241f5 | 3676 | (p1 - p1prev), current_face, rev_dir_bit); |
a2889657 | 3677 | } |
87485d6f | 3678 | #ifdef HAVE_FACES |
3c5c35c5 JB |
3679 | /* Draw the face of the newline character as extending all the |
3680 | way to the end of the frame line. */ | |
3681 | if (current_face) | |
1105ff20 KH |
3682 | { |
3683 | if (p1 < leftmargin) | |
3684 | p1 = leftmargin; | |
3685 | while (p1 < endp) | |
1c9241f5 | 3686 | *p1++ = FAST_MAKE_GLYPH (' ', current_face) | rev_dir_bit; |
1105ff20 | 3687 | } |
3c5c35c5 | 3688 | #endif |
545e04f6 KH |
3689 | |
3690 | /* Update charstarts for the ^M that ended this line. */ | |
3691 | /* Do nothing here for a char that's entirely off the left edge | |
3692 | or if it starts at the right edge. */ | |
3693 | if (p1 >= leftmargin && p1prev != endp) | |
3694 | { | |
3695 | /* Store the newline's position into charstarts | |
3696 | for the column where the newline starts. | |
3697 | Store -1 for the rest of the glyphs it occupies. */ | |
3698 | int *p2x = &charstart[(p1prev < leftmargin | |
3699 | ? leftmargin : p1prev) | |
3700 | - p1start]; | |
3701 | int *p2 = &charstart[(p1 < endp ? p1 : endp) - p1start]; | |
3702 | ||
3703 | *p2x++ = pos; | |
3704 | while (p2x < p2) | |
3705 | *p2x++ = -1; | |
3706 | } | |
68a37fa8 | 3707 | break; |
a2889657 | 3708 | } |
a2889657 JB |
3709 | else if (c < 0200 && ctl_arrow) |
3710 | { | |
d2f84654 | 3711 | if (p1 >= leftmargin) |
e57bca5d KH |
3712 | *p1 = (fix_glyph |
3713 | (f, (dp && INTEGERP (DISP_CTRL_GLYPH (dp)) | |
3714 | && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (dp))) | |
3715 | ? XINT (DISP_CTRL_GLYPH (dp)) : '^'), | |
3716 | current_face) | |
1c9241f5 | 3717 | | rev_dir_bit); |
a2889657 | 3718 | p1++; |
d2f84654 | 3719 | if (p1 >= leftmargin && p1 < endp) |
1c9241f5 | 3720 | *p1 = MAKE_GLYPH (f, c ^ 0100, current_face) | rev_dir_bit; |
a2889657 JB |
3721 | p1++; |
3722 | } | |
1c9241f5 | 3723 | else if (len == 1) |
a2889657 | 3724 | { |
1c9241f5 | 3725 | /* C is not a multibyte character. */ |
0d09d1e6 KH |
3726 | eat_following_binary_data = multibyte && BASE_LEADING_CODE_P (c); |
3727 | ||
3728 | label_display_binary_data: | |
3729 | do { | |
3730 | if (p1 >= leftmargin && p1 < endp) | |
3731 | *p1 = (fix_glyph | |
3732 | (f, (dp && INTEGERP (DISP_ESCAPE_GLYPH (dp)) | |
3733 | && GLYPH_CHAR_VALID_P (XINT (DISP_ESCAPE_GLYPH (dp))) | |
3734 | ? XINT (DISP_ESCAPE_GLYPH (dp)) : '\\'), | |
3735 | current_face) | |
3736 | | rev_dir_bit); | |
3737 | p1++; | |
3738 | if (p1 >= leftmargin && p1 < endp) | |
3739 | *p1 = MAKE_GLYPH (f, (c >> 6) + '0', current_face) | rev_dir_bit; | |
3740 | p1++; | |
3741 | if (p1 >= leftmargin && p1 < endp) | |
3742 | *p1 = (MAKE_GLYPH (f, (7 & (c >> 3)) + '0', current_face) | |
3743 | | rev_dir_bit); | |
3744 | p1++; | |
3745 | if (p1 >= leftmargin && p1 < endp) | |
3746 | *p1 = MAKE_GLYPH (f, (7 & c) + '0', current_face) | rev_dir_bit; | |
3747 | p1++; | |
3748 | } while (eat_following_binary_data | |
3749 | && (pos_byte + len) < limit_byte | |
3750 | && ! CHAR_HEAD_P (*p) | |
3751 | && ((c = *p++), len++)); | |
a2889657 | 3752 | } |
1c9241f5 KH |
3753 | else |
3754 | { | |
3755 | /* C is a multibyte character. */ | |
3756 | int charset = CHAR_CHARSET (c); | |
3757 | int columns = (charset == CHARSET_COMPOSITION | |
3758 | ? cmpchar_table[COMPOSITE_CHAR_ID (c)]->width | |
3759 | : CHARSET_WIDTH (charset)); | |
3760 | GLYPH g = MAKE_GLYPH (f, c, current_face) | rev_dir_bit; | |
3761 | ||
3762 | while (columns--) | |
3763 | { | |
3764 | if (p1 >= leftmargin && p1 < endp) | |
3765 | *p1 = g, g |= GLYPH_MASK_PADDING; | |
3766 | p1++; | |
3767 | } | |
0d09d1e6 KH |
3768 | |
3769 | p1_wide_column_end = p1; | |
3770 | /* Check if binary data follows it. */ | |
3771 | if (pos_byte + len < limit_byte | |
3772 | && ! CHAR_HEAD_P (*p)) | |
3773 | { | |
3774 | eat_following_binary_data = 1; | |
3775 | c = *p++; | |
3776 | len++; | |
3777 | goto label_display_binary_data; | |
3778 | } | |
1c9241f5 | 3779 | } |
31b24551 | 3780 | |
ca26e1c8 | 3781 | prevpos = pos; |
12adba34 RS |
3782 | prevpos_byte = pos_byte; |
3783 | pos++; | |
3784 | pos_byte += len; | |
545e04f6 KH |
3785 | |
3786 | /* Update charstarts for the character just output. */ | |
3787 | ||
3788 | /* Do nothing here for a char that's entirely off the left edge. */ | |
3789 | if (p1 >= leftmargin) | |
3790 | { | |
3791 | /* Store the char's position into charstarts | |
3792 | for the first glyph occupied by this char. | |
3793 | Store -1 for the rest of the glyphs it occupies. */ | |
3794 | if (p1 != p1prev) | |
3795 | { | |
3796 | int *p2x = &charstart[(p1prev < leftmargin | |
3797 | ? leftmargin : p1prev) | |
3798 | - p1start]; | |
3799 | int *p2 = &charstart[(p1 < endp ? p1 : endp) - p1start]; | |
3800 | ||
3801 | if (p2x < p2) | |
3802 | *p2x++ = prevpos; | |
3803 | while (p2x < p2) | |
3804 | *p2x++ = -1; | |
3805 | } | |
3806 | } | |
a2889657 JB |
3807 | } |
3808 | ||
3809 | val.hpos = - XINT (w->hscroll); | |
3810 | if (val.hpos) | |
3811 | val.hpos++; | |
3812 | ||
3813 | val.vpos = 1; | |
3814 | ||
3815 | lastpos = pos; | |
12adba34 | 3816 | lastpos_byte = pos_byte; |
a2889657 | 3817 | |
efc63ef0 RS |
3818 | /* Store 0 in this charstart line for the positions where |
3819 | there is no character. But do leave what was recorded | |
3820 | for the character that ended the line. */ | |
85bcef6c RS |
3821 | /* Add 1 in the endtest to compensate for the fact that ENDP was |
3822 | made from WIDTH, which is 1 less than the window's actual | |
3823 | internal width. */ | |
a007eef6 RS |
3824 | i = p1 - p1start + 1; |
3825 | if (p1 < leftmargin) | |
3826 | i += leftmargin - p1; | |
3827 | for (; i < endp - p1start + 1; i++) | |
efc63ef0 RS |
3828 | charstart[i] = 0; |
3829 | ||
a2889657 JB |
3830 | /* Handle continuation in middle of a character */ |
3831 | /* by backing up over it */ | |
3832 | if (p1 > endp) | |
3833 | { | |
5fcbb24d JB |
3834 | /* Don't back up if we never actually displayed any text. |
3835 | This occurs when the minibuffer prompt takes up the whole line. */ | |
3836 | if (p1prev) | |
3837 | { | |
1c9241f5 KH |
3838 | /* Start the next line with that same character whose |
3839 | character code is C and the length of multi-byte form is | |
3840 | LEN. */ | |
3841 | pos = prevpos; | |
12adba34 | 3842 | pos_byte = prevpos_byte; |
1c9241f5 | 3843 | |
0d09d1e6 KH |
3844 | if (p1_wide_column_end < endp) |
3845 | /* As ENDP is not in the middle of wide-column character, | |
3846 | we can break the line at ENDP and start from the middle | |
3847 | column in the next line. So, adjust VAL.HPOS to skip | |
3848 | the columns output on this line. */ | |
1c9241f5 KH |
3849 | val.hpos += p1prev - endp; |
3850 | else | |
3851 | { | |
0d09d1e6 KH |
3852 | /* We displayed a wide-column character at around ENDP. |
3853 | Since we can't broke it in the middle, the whole | |
3854 | character should be driven into the next line. */ | |
1c9241f5 KH |
3855 | /* As the result, the actual columns occupied by the |
3856 | text on this line is less than WIDTH. VAL.TAB_OFFSET | |
3857 | must be adjusted. */ | |
3858 | taboffset = taboffset + (p1prev - endp); | |
3859 | /* Let's fill unused columns with TRUNCATOR or CONTINUER. */ | |
3860 | { | |
3861 | GLYPH g = fix_glyph (f, truncate ? truncator : continuer, 0); | |
3862 | while (p1prev < endp) | |
3863 | *p1prev++ = g; | |
3864 | } | |
3865 | /* If POINT is at POS, cursor should not on this line. */ | |
3866 | lastpos = pos; | |
12adba34 | 3867 | lastpos_byte = pos_byte; |
1c9241f5 KH |
3868 | if (PT == pos) |
3869 | cursor_vpos = -1; | |
3870 | } | |
5fcbb24d JB |
3871 | } |
3872 | ||
a2889657 JB |
3873 | /* Keep in this line everything up to the continuation column. */ |
3874 | p1 = endp; | |
3875 | } | |
3876 | ||
3877 | /* Finish deciding which character to start the next line on, | |
3878 | and what hpos to start it at. | |
3879 | Also set `lastpos' to the last position which counts as "on this line" | |
3880 | for cursor-positioning. */ | |
3881 | ||
3882 | if (pos < ZV) | |
3883 | { | |
12adba34 | 3884 | if (FETCH_BYTE (pos_byte) == '\n') |
dd5f6267 | 3885 | { |
12adba34 RS |
3886 | int opoint = PT, opoint_byte = PT_BYTE; |
3887 | ||
dd5f6267 | 3888 | /* If stopped due to a newline, start next line after it */ |
12adba34 RS |
3889 | SET_PT_BOTH (pos + 1, pos_byte + 1); |
3890 | ||
1c9241f5 | 3891 | val.tab_offset = 0; |
dd5f6267 KH |
3892 | /* Check again for hidden lines, in case the newline occurred exactly |
3893 | at the right margin. */ | |
12adba34 RS |
3894 | while (PT < ZV && selective > 0 |
3895 | && indented_beyond_p (PT, PT_BYTE, selective)) | |
3896 | scan_newline (PT, PT_BYTE, ZV, ZV_BYTE, 1, 1); | |
3897 | ||
3898 | pos = PT, pos_byte = PT_BYTE; | |
3899 | SET_PT_BOTH (opoint, opoint_byte); | |
dd5f6267 | 3900 | } |
a2889657 JB |
3901 | else |
3902 | /* Stopped due to right margin of window */ | |
3903 | { | |
3904 | if (truncate) | |
3905 | { | |
12adba34 RS |
3906 | int opoint = PT, opoint_byte = PT_BYTE; |
3907 | ||
3908 | SET_PT_BOTH (pos, pos_byte); | |
278feba9 | 3909 | *p1++ = fix_glyph (f, truncator, 0); |
a2889657 JB |
3910 | /* Truncating => start next line after next newline, |
3911 | and point is on this line if it is before the newline, | |
3912 | and skip none of first char of next line */ | |
dd5f6267 | 3913 | do |
12adba34 RS |
3914 | scan_newline (PT, PT_BYTE, ZV, ZV_BYTE, 1, 1); |
3915 | while (PT < ZV && selective > 0 | |
3916 | && indented_beyond_p (PT, PT_BYTE, selective)); | |
3917 | pos = PT, pos_byte = PT_BYTE; | |
a2889657 | 3918 | val.hpos = XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0; |
12adba34 | 3919 | SET_PT_BOTH (opoint, opoint_byte); |
a2889657 | 3920 | |
12adba34 RS |
3921 | lastpos = pos - (FETCH_BYTE (pos_byte - 1) == '\n'); |
3922 | lastpos_byte = CHAR_TO_BYTE (lastpos); | |
1c9241f5 | 3923 | val.tab_offset = 0; |
a2889657 JB |
3924 | } |
3925 | else | |
3926 | { | |
278feba9 | 3927 | *p1++ = fix_glyph (f, continuer, 0); |
a2889657 JB |
3928 | val.vpos = 0; |
3929 | lastpos--; | |
0d09d1e6 KH |
3930 | if (multibyte) |
3931 | DEC_POS (lastpos_byte); | |
3932 | else | |
3933 | lastpos_byte--; | |
1c9241f5 | 3934 | val.tab_offset = taboffset + width; |
a2889657 JB |
3935 | } |
3936 | } | |
3937 | } | |
1c9241f5 KH |
3938 | else |
3939 | val.tab_offset = 0; | |
a2889657 JB |
3940 | |
3941 | /* If point is at eol or in invisible text at eol, | |
44fa5b1e | 3942 | record its frame location now. */ |
a2889657 | 3943 | |
ae3b1442 | 3944 | if (start <= PT && PT <= lastpos && cursor_vpos < 0) |
a2889657 JB |
3945 | { |
3946 | cursor_vpos = vpos; | |
d2f84654 | 3947 | cursor_hpos = p1 - leftmargin; |
a2889657 JB |
3948 | } |
3949 | ||
3950 | if (cursor_vpos == vpos) | |
3951 | { | |
3952 | if (cursor_hpos < 0) cursor_hpos = 0; | |
3953 | if (cursor_hpos > width) cursor_hpos = width; | |
73f194f1 | 3954 | cursor_hpos += WINDOW_LEFT_MARGIN (w); |
44fa5b1e | 3955 | if (w == XWINDOW (FRAME_SELECTED_WINDOW (f))) |
a2889657 | 3956 | { |
b5bbc9a5 KH |
3957 | if (!(cursor_in_echo_area && FRAME_HAS_MINIBUF_P (f) |
3958 | && EQ (FRAME_MINIBUF_WINDOW (f), minibuf_window))) | |
3959 | { | |
3960 | FRAME_CURSOR_Y (f) = cursor_vpos; | |
3961 | FRAME_CURSOR_X (f) = cursor_hpos; | |
3962 | } | |
a2889657 JB |
3963 | |
3964 | if (w == XWINDOW (selected_window)) | |
3965 | { | |
3966 | /* Line is not continued and did not start | |
3967 | in middle of character */ | |
73f194f1 | 3968 | if ((hpos - WINDOW_LEFT_MARGIN (w) |
a2889657 JB |
3969 | == (XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0)) |
3970 | && val.vpos) | |
3971 | { | |
3972 | this_line_bufpos = start; | |
3973 | this_line_buffer = current_buffer; | |
3974 | this_line_vpos = cursor_vpos; | |
89819bdd | 3975 | this_line_start_hpos = hpos - WINDOW_LEFT_MARGIN (w); |
a2889657 JB |
3976 | this_line_endpos = Z - lastpos; |
3977 | } | |
3978 | else | |
3979 | this_line_bufpos = 0; | |
3980 | } | |
3981 | } | |
3982 | } | |
3983 | ||
3984 | /* If hscroll and line not empty, insert truncation-at-left marker */ | |
3985 | if (hscroll && lastpos != start) | |
3986 | { | |
1c9241f5 KH |
3987 | GLYPH g = fix_glyph (f, truncator, 0); |
3988 | *leftmargin = g; | |
d2f84654 RS |
3989 | if (p1 <= leftmargin) |
3990 | p1 = leftmargin + 1; | |
1c9241f5 KH |
3991 | else /* MULE: it may be a wide-column character */ |
3992 | { | |
3993 | p1prev = leftmargin + 1; | |
3994 | while (p1prev < p1 && *p1prev & GLYPH_MASK_PADDING) | |
3995 | *p1prev++ = g; | |
3996 | } | |
a2889657 JB |
3997 | } |
3998 | ||
73f194f1 | 3999 | if (!WINDOW_RIGHTMOST_P (w)) |
a2889657 JB |
4000 | { |
4001 | endp++; | |
d2f84654 | 4002 | if (p1 < leftmargin) p1 = leftmargin; |
a2889657 | 4003 | while (p1 < endp) *p1++ = SPACEGLYPH; |
b1d1124b | 4004 | |
88f22aff JB |
4005 | /* Don't draw vertical bars if we're using scroll bars. They're |
4006 | covered up by the scroll bars, and it's distracting to see | |
4007 | them when the scroll bar windows are flickering around to be | |
b1d1124b | 4008 | reconfigured. */ |
73f194f1 | 4009 | if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_RIGHT (f)) |
75d13c64 KH |
4010 | { |
4011 | int i; | |
4012 | for (i = 0; i < FRAME_SCROLL_BAR_COLS (f); i++) | |
4013 | *p1++ = SPACEGLYPH; | |
4014 | } | |
73f194f1 | 4015 | else if (!FRAME_HAS_VERTICAL_SCROLL_BARS (f)) |
75d13c64 | 4016 | *p1++ = (dp && INTEGERP (DISP_BORDER_GLYPH (dp)) |
8bb6ca14 | 4017 | ? XINT (DISP_BORDER_GLYPH (dp)) |
75d13c64 | 4018 | : '|'); |
a2889657 JB |
4019 | } |
4020 | desired_glyphs->used[vpos] = max (desired_glyphs->used[vpos], | |
4021 | p1 - desired_glyphs->glyphs[vpos]); | |
4022 | desired_glyphs->glyphs[vpos][desired_glyphs->used[vpos]] = 0; | |
4023 | ||
4024 | /* If the start of this line is the overlay arrow-position, | |
4025 | then put the arrow string into the display-line. */ | |
4026 | ||
e24c997d | 4027 | if (MARKERP (Voverlay_arrow_position) |
a2889657 JB |
4028 | && current_buffer == XMARKER (Voverlay_arrow_position)->buffer |
4029 | && start == marker_position (Voverlay_arrow_position) | |
e24c997d | 4030 | && STRINGP (Voverlay_arrow_string) |
a2889657 JB |
4031 | && ! overlay_arrow_seen) |
4032 | { | |
0a9dc68b | 4033 | int i, i_byte; |
a2889657 | 4034 | int len = XSTRING (Voverlay_arrow_string)->size; |
142be3dd | 4035 | int arrow_end; |
a2889657 | 4036 | |
b1d1124b JB |
4037 | if (len > width) |
4038 | len = width; | |
87485d6f | 4039 | #ifdef HAVE_FACES |
c4628384 RS |
4040 | if (!NULL_INTERVAL_P (XSTRING (Voverlay_arrow_string)->intervals)) |
4041 | { | |
4042 | /* If the arrow string has text props, obey them when displaying. */ | |
0a9dc68b | 4043 | for (i = 0, i_byte = 0; i < len; ) |
c4628384 | 4044 | { |
0a9dc68b | 4045 | int c; |
c4628384 RS |
4046 | Lisp_Object face, ilisp; |
4047 | int newface; | |
4048 | ||
0a9dc68b RS |
4049 | if (STRING_MULTIBYTE (Voverlay_arrow_string)) |
4050 | FETCH_STRING_CHAR_ADVANCE (c, Voverlay_arrow_string, i, i_byte); | |
4051 | else | |
4052 | c = XSTRING (Voverlay_arrow_string)->data[i++]; | |
4053 | ||
c2213350 | 4054 | XSETFASTINT (ilisp, i); |
c4628384 RS |
4055 | face = Fget_text_property (ilisp, Qface, Voverlay_arrow_string); |
4056 | newface = compute_glyph_face_1 (f, face, 0); | |
4057 | leftmargin[i] = FAST_MAKE_GLYPH (c, newface); | |
4058 | } | |
4059 | } | |
4060 | else | |
87485d6f | 4061 | #endif /* HAVE_FACES */ |
c4628384 RS |
4062 | { |
4063 | for (i = 0; i < len; i++) | |
4064 | leftmargin[i] = p[i]; | |
4065 | } | |
142be3dd JB |
4066 | |
4067 | /* Bug in SunOS 4.1.1 compiler requires this intermediate variable. */ | |
d2f84654 | 4068 | arrow_end = (leftmargin - desired_glyphs->glyphs[vpos]) + len; |
142be3dd JB |
4069 | if (desired_glyphs->used[vpos] < arrow_end) |
4070 | desired_glyphs->used[vpos] = arrow_end; | |
a2889657 JB |
4071 | |
4072 | overlay_arrow_seen = 1; | |
4073 | } | |
4074 | ||
4075 | val.bufpos = pos; | |
12adba34 | 4076 | val.bytepos = pos_byte; |
0f9c0ff0 | 4077 | val.ovstring_chars_done = ovstr_done; |
a2889657 JB |
4078 | val_display_text_line = val; |
4079 | return &val_display_text_line; | |
4080 | } | |
4081 | \f | |
7ce2c095 RS |
4082 | /* Redisplay the menu bar in the frame for window W. */ |
4083 | ||
4084 | static void | |
4085 | display_menu_bar (w) | |
4086 | struct window *w; | |
4087 | { | |
4088 | Lisp_Object items, tail; | |
4089 | register int vpos = 0; | |
4090 | register FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); | |
eeb4f710 | 4091 | int maxendcol = FRAME_WIDTH (f); |
7ce2c095 | 4092 | int hpos = 0; |
8351baf2 | 4093 | int i; |
7ce2c095 | 4094 | |
dc937613 | 4095 | #ifdef HAVE_NTGUI |
d129c4c2 KH |
4096 | if (!NILP (Vwindow_system)) |
4097 | return; | |
dc937613 RS |
4098 | #endif |
4099 | ||
4100 | #ifdef USE_X_TOOLKIT | |
d3413a53 | 4101 | if (FRAME_X_P (f)) |
7ce2c095 | 4102 | return; |
dc937613 | 4103 | #endif /* USE_X_TOOLKIT */ |
7ce2c095 RS |
4104 | |
4105 | get_display_line (f, vpos, 0); | |
4106 | ||
8351baf2 | 4107 | items = FRAME_MENU_BAR_ITEMS (f); |
469937ac | 4108 | for (i = 0; i < XVECTOR (items)->size; i += 4) |
7ce2c095 | 4109 | { |
8351baf2 RS |
4110 | Lisp_Object pos, string; |
4111 | string = XVECTOR (items)->contents[i + 1]; | |
4112 | if (NILP (string)) | |
4113 | break; | |
2d66ad19 | 4114 | |
469937ac | 4115 | XSETFASTINT (XVECTOR (items)->contents[i + 3], hpos); |
7ce2c095 RS |
4116 | |
4117 | if (hpos < maxendcol) | |
11c52c4f | 4118 | hpos = display_string (w, vpos, |
7ce2c095 | 4119 | XSTRING (string)->data, |
0a9dc68b RS |
4120 | XSTRING (string)->size_byte, |
4121 | hpos, 0, 0, hpos, maxendcol, | |
4122 | STRING_MULTIBYTE (string)); | |
6b1bbc46 | 4123 | /* Put a space between items. */ |
2d66ad19 RS |
4124 | if (hpos < maxendcol) |
4125 | { | |
6b1bbc46 | 4126 | int hpos1 = hpos + 1; |
278feba9 | 4127 | hpos = display_string (w, vpos, "", 0, hpos, 0, 0, |
a3788d53 | 4128 | min (hpos1, maxendcol), maxendcol, 0); |
2d66ad19 | 4129 | } |
7ce2c095 RS |
4130 | } |
4131 | ||
4132 | FRAME_DESIRED_GLYPHS (f)->bufp[vpos] = 0; | |
4133 | FRAME_DESIRED_GLYPHS (f)->highlight[vpos] = mode_line_inverse_video; | |
2d66ad19 RS |
4134 | |
4135 | /* Fill out the line with spaces. */ | |
4136 | if (maxendcol > hpos) | |
a3788d53 | 4137 | hpos = display_string (w, vpos, "", 0, hpos, 0, 0, maxendcol, maxendcol, 0); |
db6f348c JB |
4138 | |
4139 | /* Clear the rest of the lines allocated to the menu bar. */ | |
4140 | vpos++; | |
4141 | while (vpos < FRAME_MENU_BAR_LINES (f)) | |
4142 | get_display_line (f, vpos++, 0); | |
7ce2c095 RS |
4143 | } |
4144 | \f | |
a2889657 JB |
4145 | /* Display the mode line for window w */ |
4146 | ||
4147 | static void | |
4148 | display_mode_line (w) | |
4149 | struct window *w; | |
4150 | { | |
4151 | register int vpos = XFASTINT (w->height) + XFASTINT (w->top) - 1; | |
73f194f1 RS |
4152 | register int left = WINDOW_LEFT_MARGIN (w); |
4153 | register int right = WINDOW_RIGHT_MARGIN (w); | |
44fa5b1e | 4154 | register FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
a2889657 | 4155 | |
aa6d10fa | 4156 | line_number_displayed = 0; |
155ef550 | 4157 | w->column_number_displayed = Qnil; |
aa6d10fa | 4158 | |
44fa5b1e | 4159 | get_display_line (f, vpos, left); |
03b294dc RS |
4160 | |
4161 | /* Temporarily make frame F's kboard the current kboard | |
4162 | so that kboard-local variables in the mode_line_format | |
4163 | will get the right values. */ | |
4164 | push_frame_kboard (f); | |
4165 | ||
4166 | display_mode_element (w, vpos, left, 0, right, right, | |
4167 | current_buffer->mode_line_format); | |
4168 | ||
4169 | pop_frame_kboard (); | |
4170 | ||
44fa5b1e | 4171 | FRAME_DESIRED_GLYPHS (f)->bufp[vpos] = 0; |
a2889657 | 4172 | |
73f194f1 RS |
4173 | /* Put the mode line in inverse video. |
4174 | Use faces if possible, since that lets us handle | |
4175 | partial-width windows and avoid inverting the scroll bar columns. */ | |
87485d6f | 4176 | #ifdef HAVE_FACES |
73f194f1 | 4177 | if (! FRAME_TERMCAP_P (f) && mode_line_inverse_video) |
d7eb09a0 RS |
4178 | { |
4179 | /* For a partial width window, explicitly set face of each glyph. */ | |
4180 | int i; | |
1c9241f5 | 4181 | unsigned int padding; |
d7eb09a0 RS |
4182 | GLYPH *ptr = FRAME_DESIRED_GLYPHS (f)->glyphs[vpos]; |
4183 | for (i = left; i < right; ++i) | |
1c9241f5 KH |
4184 | { |
4185 | padding = ptr[i] & GLYPH_MASK_PADDING; | |
4186 | ptr[i] = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (ptr[i]), 1) | padding; | |
4187 | } | |
d7eb09a0 | 4188 | } |
010a899e | 4189 | else |
4cdc65eb | 4190 | #endif |
73f194f1 RS |
4191 | |
4192 | /* Make the mode line inverse video if the entire line | |
4193 | is made of mode lines. | |
4194 | I.e. if this window is full width, | |
4195 | or if it is the child of a full width window | |
4196 | (which implies that that window is split side-by-side | |
4197 | and the rest of this line is mode lines of the sibling windows). */ | |
010a899e KH |
4198 | if (WINDOW_FULL_WIDTH_P (w) |
4199 | || WINDOW_FULL_WIDTH_P (XWINDOW (w->parent))) | |
73f194f1 | 4200 | FRAME_DESIRED_GLYPHS (f)->highlight[vpos] = mode_line_inverse_video; |
a2889657 JB |
4201 | } |
4202 | ||
4203 | /* Contribute ELT to the mode line for window W. | |
4204 | How it translates into text depends on its data type. | |
4205 | ||
4206 | VPOS is the position of the mode line being displayed. | |
4207 | ||
44fa5b1e | 4208 | HPOS is the position (absolute on frame) where this element's text |
a2889657 JB |
4209 | should start. The output is truncated automatically at the right |
4210 | edge of window W. | |
4211 | ||
4212 | DEPTH is the depth in recursion. It is used to prevent | |
4213 | infinite recursion here. | |
4214 | ||
4215 | MINENDCOL is the hpos before which the element may not end. | |
4216 | The element is padded at the right with spaces if nec | |
4217 | to reach this column. | |
4218 | ||
4219 | MAXENDCOL is the hpos past which this element may not extend. | |
4220 | If MINENDCOL is > MAXENDCOL, MINENDCOL takes priority. | |
4221 | (This is necessary to make nested padding and truncation work.) | |
4222 | ||
4223 | Returns the hpos of the end of the text generated by ELT. | |
4224 | The next element will receive that value as its HPOS arg, | |
4225 | so as to concatenate the elements. */ | |
4226 | ||
4227 | static int | |
4228 | display_mode_element (w, vpos, hpos, depth, minendcol, maxendcol, elt) | |
4229 | struct window *w; | |
4230 | register int vpos, hpos; | |
4231 | int depth; | |
4232 | int minendcol; | |
4233 | register int maxendcol; | |
4234 | register Lisp_Object elt; | |
4235 | { | |
4236 | tail_recurse: | |
4237 | if (depth > 10) | |
4238 | goto invalid; | |
4239 | ||
4240 | depth++; | |
4241 | ||
0220c518 | 4242 | switch (SWITCH_ENUM_CAST (XTYPE (elt))) |
a2889657 JB |
4243 | { |
4244 | case Lisp_String: | |
4245 | { | |
4246 | /* A string: output it and check for %-constructs within it. */ | |
4247 | register unsigned char c; | |
4248 | register unsigned char *this = XSTRING (elt)->data; | |
4249 | ||
4250 | while (hpos < maxendcol && *this) | |
4251 | { | |
4252 | unsigned char *last = this; | |
4253 | while ((c = *this++) != '\0' && c != '%') | |
4254 | ; | |
4255 | if (this - 1 != last) | |
4256 | { | |
4257 | register int lim = --this - last + hpos; | |
d39b6696 KH |
4258 | if (frame_title_ptr) |
4259 | hpos = store_frame_title (last, hpos, min (lim, maxendcol)); | |
4260 | else | |
4261 | hpos = display_string (w, vpos, last, -1, hpos, 0, 1, | |
0a9dc68b RS |
4262 | hpos, min (lim, maxendcol), |
4263 | STRING_MULTIBYTE (elt)); | |
a2889657 JB |
4264 | } |
4265 | else /* c == '%' */ | |
4266 | { | |
766525bc | 4267 | register int minendcol; |
a2889657 JB |
4268 | register int spec_width = 0; |
4269 | ||
4270 | /* We can't allow -ve args due to the "%-" construct */ | |
4271 | /* Argument specifies minwidth but not maxwidth | |
4272 | (maxwidth can be specified by | |
4273 | (<negative-number> . <stuff>) mode-line elements) */ | |
4274 | ||
4275 | while ((c = *this++) >= '0' && c <= '9') | |
4276 | { | |
4277 | spec_width = spec_width * 10 + (c - '0'); | |
4278 | } | |
4279 | ||
766525bc RS |
4280 | minendcol = hpos + spec_width; |
4281 | if (minendcol > maxendcol) | |
4282 | { | |
4283 | spec_width = maxendcol - hpos; | |
4284 | minendcol = maxendcol; | |
4285 | } | |
a2889657 JB |
4286 | |
4287 | if (c == 'M') | |
4288 | hpos = display_mode_element (w, vpos, hpos, depth, | |
4289 | spec_width, maxendcol, | |
4290 | Vglobal_mode_string); | |
4291 | else if (c != 0) | |
d39b6696 | 4292 | { |
766525bc RS |
4293 | char *spec = decode_mode_spec (w, c, spec_width, |
4294 | maxendcol - hpos); | |
d39b6696 | 4295 | if (frame_title_ptr) |
766525bc | 4296 | hpos = store_frame_title (spec, minendcol, maxendcol); |
d39b6696 KH |
4297 | else |
4298 | hpos = display_string (w, vpos, spec, -1, | |
4299 | hpos, 0, 1, | |
a3788d53 | 4300 | minendcol, maxendcol, -1); |
d39b6696 | 4301 | } |
a2889657 JB |
4302 | } |
4303 | } | |
4304 | } | |
4305 | break; | |
4306 | ||
4307 | case Lisp_Symbol: | |
4308 | /* A symbol: process the value of the symbol recursively | |
4309 | as if it appeared here directly. Avoid error if symbol void. | |
4310 | Special case: if value of symbol is a string, output the string | |
4311 | literally. */ | |
4312 | { | |
4313 | register Lisp_Object tem; | |
4314 | tem = Fboundp (elt); | |
265a9e55 | 4315 | if (!NILP (tem)) |
a2889657 JB |
4316 | { |
4317 | tem = Fsymbol_value (elt); | |
4318 | /* If value is a string, output that string literally: | |
4319 | don't check for % within it. */ | |
e24c997d | 4320 | if (STRINGP (tem)) |
d39b6696 KH |
4321 | { |
4322 | if (frame_title_ptr) | |
4323 | hpos = store_frame_title (XSTRING (tem)->data, | |
4324 | minendcol, maxendcol); | |
4325 | else | |
4326 | hpos = display_string (w, vpos, XSTRING (tem)->data, | |
0a9dc68b RS |
4327 | XSTRING (tem)->size_byte, |
4328 | hpos, 0, 1, minendcol, maxendcol, | |
4329 | STRING_MULTIBYTE (tem)); | |
d39b6696 | 4330 | } |
a2889657 JB |
4331 | /* Give up right away for nil or t. */ |
4332 | else if (!EQ (tem, elt)) | |
4333 | { elt = tem; goto tail_recurse; } | |
4334 | } | |
4335 | } | |
4336 | break; | |
4337 | ||
4338 | case Lisp_Cons: | |
4339 | { | |
4340 | register Lisp_Object car, tem; | |
4341 | ||
4342 | /* A cons cell: three distinct cases. | |
4343 | If first element is a string or a cons, process all the elements | |
4344 | and effectively concatenate them. | |
4345 | If first element is a negative number, truncate displaying cdr to | |
4346 | at most that many characters. If positive, pad (with spaces) | |
4347 | to at least that many characters. | |
4348 | If first element is a symbol, process the cadr or caddr recursively | |
4349 | according to whether the symbol's value is non-nil or nil. */ | |
4350 | car = XCONS (elt)->car; | |
e24c997d | 4351 | if (SYMBOLP (car)) |
a2889657 JB |
4352 | { |
4353 | tem = Fboundp (car); | |
4354 | elt = XCONS (elt)->cdr; | |
e24c997d | 4355 | if (!CONSP (elt)) |
a2889657 JB |
4356 | goto invalid; |
4357 | /* elt is now the cdr, and we know it is a cons cell. | |
4358 | Use its car if CAR has a non-nil value. */ | |
265a9e55 | 4359 | if (!NILP (tem)) |
a2889657 JB |
4360 | { |
4361 | tem = Fsymbol_value (car); | |
265a9e55 | 4362 | if (!NILP (tem)) |
a2889657 JB |
4363 | { elt = XCONS (elt)->car; goto tail_recurse; } |
4364 | } | |
4365 | /* Symbol's value is nil (or symbol is unbound) | |
4366 | Get the cddr of the original list | |
4367 | and if possible find the caddr and use that. */ | |
4368 | elt = XCONS (elt)->cdr; | |
265a9e55 | 4369 | if (NILP (elt)) |
a2889657 | 4370 | break; |
e24c997d | 4371 | else if (!CONSP (elt)) |
a2889657 JB |
4372 | goto invalid; |
4373 | elt = XCONS (elt)->car; | |
4374 | goto tail_recurse; | |
4375 | } | |
e24c997d | 4376 | else if (INTEGERP (car)) |
a2889657 JB |
4377 | { |
4378 | register int lim = XINT (car); | |
4379 | elt = XCONS (elt)->cdr; | |
4380 | if (lim < 0) | |
4381 | /* Negative int means reduce maximum width. | |
4382 | DO NOT change MINENDCOL here! | |
4383 | (20 -10 . foo) should truncate foo to 10 col | |
4384 | and then pad to 20. */ | |
4385 | maxendcol = min (maxendcol, hpos - lim); | |
4386 | else if (lim > 0) | |
4387 | { | |
4388 | /* Padding specified. Don't let it be more than | |
4389 | current maximum. */ | |
4390 | lim += hpos; | |
4391 | if (lim > maxendcol) | |
4392 | lim = maxendcol; | |
4393 | /* If that's more padding than already wanted, queue it. | |
4394 | But don't reduce padding already specified even if | |
4395 | that is beyond the current truncation point. */ | |
4396 | if (lim > minendcol) | |
4397 | minendcol = lim; | |
4398 | } | |
4399 | goto tail_recurse; | |
4400 | } | |
e24c997d | 4401 | else if (STRINGP (car) || CONSP (car)) |
a2889657 JB |
4402 | { |
4403 | register int limit = 50; | |
4404 | /* LIMIT is to protect against circular lists. */ | |
e24c997d | 4405 | while (CONSP (elt) && --limit > 0 |
a2889657 JB |
4406 | && hpos < maxendcol) |
4407 | { | |
4408 | hpos = display_mode_element (w, vpos, hpos, depth, | |
4409 | hpos, maxendcol, | |
4410 | XCONS (elt)->car); | |
4411 | elt = XCONS (elt)->cdr; | |
4412 | } | |
4413 | } | |
4414 | } | |
4415 | break; | |
4416 | ||
4417 | default: | |
4418 | invalid: | |
d39b6696 KH |
4419 | if (frame_title_ptr) |
4420 | hpos = store_frame_title ("*invalid*", minendcol, maxendcol); | |
4421 | else | |
4422 | hpos = display_string (w, vpos, "*invalid*", -1, hpos, 0, 1, | |
a3788d53 | 4423 | minendcol, maxendcol, 0); |
d39b6696 | 4424 | return hpos; |
a2889657 JB |
4425 | } |
4426 | ||
a2889657 | 4427 | if (minendcol > hpos) |
d39b6696 KH |
4428 | if (frame_title_ptr) |
4429 | hpos = store_frame_title ("", minendcol, maxendcol); | |
4430 | else | |
a3788d53 RS |
4431 | hpos = display_string (w, vpos, "", 0, hpos, |
4432 | 0, 1, minendcol, maxendcol, 0); | |
a2889657 JB |
4433 | return hpos; |
4434 | } | |
4435 | \f | |
766525bc RS |
4436 | /* Write a null-terminated, right justified decimal representation of |
4437 | the positive integer D to BUF using a minimal field width WIDTH. */ | |
4438 | ||
4439 | static void | |
4440 | pint2str (buf, width, d) | |
4441 | register char *buf; | |
4442 | register int width; | |
4443 | register int d; | |
4444 | { | |
4445 | register char *p = buf; | |
4446 | ||
4447 | if (d <= 0) | |
4448 | *p++ = '0'; | |
4449 | else | |
4450 | while (d > 0) | |
4451 | { | |
4452 | *p++ = d % 10 + '0'; | |
4453 | d /= 10; | |
4454 | } | |
4455 | for (width -= (int) (p - buf); width > 0; --width) *p++ = ' '; | |
4456 | *p-- = '\0'; | |
4457 | while (p > buf) | |
4458 | { | |
4459 | d = *buf; | |
4460 | *buf++ = *p; | |
4461 | *p-- = d; | |
4462 | } | |
4463 | } | |
4464 | ||
1c9241f5 KH |
4465 | /* Set a mnemonic character for CODING_SYSTEM (Lisp symbol) in BUF. |
4466 | If EOL_FLAG is 1, set also a mnemonic character for end-of-line | |
4467 | type of CODING_SYSTEM. Return updated pointer into BUF. */ | |
4468 | ||
4469 | static char * | |
4470 | decode_mode_spec_coding (coding_system, buf, eol_flag) | |
4471 | Lisp_Object coding_system; | |
4472 | register char *buf; | |
4473 | int eol_flag; | |
4474 | { | |
1e1078d6 | 4475 | Lisp_Object val; |
916848d8 | 4476 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
1e1078d6 RS |
4477 | |
4478 | val = coding_system; | |
1c9241f5 KH |
4479 | |
4480 | if (NILP (val)) /* Not yet decided. */ | |
4481 | { | |
916848d8 RS |
4482 | if (multibyte) |
4483 | *buf++ = '-'; | |
21e989e3 RS |
4484 | if (eol_flag) |
4485 | *buf++ = eol_mnemonic_undecided; | |
1e1078d6 | 4486 | /* Don't mention EOL conversion if it isn't decided. */ |
1c9241f5 KH |
4487 | } |
4488 | else | |
4489 | { | |
1e1078d6 RS |
4490 | Lisp_Object eolvalue; |
4491 | ||
4492 | eolvalue = Fget (coding_system, Qeol_type); | |
4493 | ||
1c9241f5 | 4494 | while (!NILP (val) && SYMBOLP (val)) |
1e1078d6 RS |
4495 | { |
4496 | val = Fget (val, Qcoding_system); | |
4497 | if (NILP (eolvalue)) | |
b070c1d7 | 4498 | eolvalue = Fget (val, Qeol_type); |
1e1078d6 RS |
4499 | } |
4500 | ||
916848d8 RS |
4501 | if (multibyte) |
4502 | *buf++ = XFASTINT (XVECTOR (val)->contents[1]); | |
4503 | ||
1c9241f5 KH |
4504 | if (eol_flag) |
4505 | { | |
1e1078d6 RS |
4506 | /* The EOL conversion we are using. */ |
4507 | int eoltype; | |
4508 | /* The EOL conversion that is normal on this system. */ | |
4509 | ||
4510 | if (NILP (eolvalue)) /* Not yet decided. */ | |
4511 | eoltype = eol_mnemonic_undecided; | |
4512 | else if (VECTORP (eolvalue)) /* Not yet decided. */ | |
4513 | eoltype = eol_mnemonic_undecided; | |
4514 | else /* INTEGERP (eolvalue) -- 0:LF, 1:CRLF, 2:CR */ | |
4515 | eoltype = (XFASTINT (eolvalue) == 0 | |
4516 | ? eol_mnemonic_unix | |
4517 | : (XFASTINT (eolvalue) == 1 | |
4518 | ? eol_mnemonic_dos : eol_mnemonic_mac)); | |
4519 | ||
4520 | /* Mention the EOL conversion if it is not the usual one. */ | |
4521 | *buf++ = eoltype; | |
1c9241f5 KH |
4522 | } |
4523 | } | |
4524 | return buf; | |
4525 | } | |
4526 | ||
a2889657 | 4527 | /* Return a string for the output of a mode line %-spec for window W, |
766525bc RS |
4528 | generated by character C. SPEC_WIDTH is the field width when |
4529 | padding to the left (%c, %l). The value returned from this | |
4530 | function will later be truncated to width MAXWIDTH. */ | |
a2889657 | 4531 | |
11e82b76 JB |
4532 | static char lots_of_dashes[] = "--------------------------------------------------------------------------------------------------------------------------------------------"; |
4533 | ||
a2889657 | 4534 | static char * |
766525bc | 4535 | decode_mode_spec (w, c, spec_width, maxwidth) |
a2889657 JB |
4536 | struct window *w; |
4537 | register char c; | |
766525bc | 4538 | register int spec_width; |
a2889657 JB |
4539 | register int maxwidth; |
4540 | { | |
0b67772d | 4541 | Lisp_Object obj; |
44fa5b1e JB |
4542 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
4543 | char *decode_mode_spec_buf = (char *) FRAME_TEMP_GLYPHS (f)->total_contents; | |
d39b6696 | 4544 | struct buffer *b = XBUFFER (w->buffer); |
a2889657 | 4545 | |
0b67772d | 4546 | obj = Qnil; |
44fa5b1e JB |
4547 | if (maxwidth > FRAME_WIDTH (f)) |
4548 | maxwidth = FRAME_WIDTH (f); | |
a2889657 JB |
4549 | |
4550 | switch (c) | |
4551 | { | |
1af9f229 RS |
4552 | case '*': |
4553 | if (!NILP (b->read_only)) | |
4554 | return "%"; | |
4555 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
4556 | return "*"; | |
4557 | return "-"; | |
4558 | ||
4559 | case '+': | |
4560 | /* This differs from %* only for a modified read-only buffer. */ | |
4561 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
4562 | return "*"; | |
4563 | if (!NILP (b->read_only)) | |
4564 | return "%"; | |
4565 | return "-"; | |
4566 | ||
4567 | case '&': | |
4568 | /* This differs from %* in ignoring read-only-ness. */ | |
4569 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
4570 | return "*"; | |
4571 | return "-"; | |
4572 | ||
4573 | case '%': | |
4574 | return "%"; | |
4575 | ||
4576 | case '[': | |
4577 | { | |
4578 | int i; | |
4579 | char *p; | |
4580 | ||
4581 | if (command_loop_level > 5) | |
4582 | return "[[[... "; | |
4583 | p = decode_mode_spec_buf; | |
4584 | for (i = 0; i < command_loop_level; i++) | |
4585 | *p++ = '['; | |
4586 | *p = 0; | |
4587 | return decode_mode_spec_buf; | |
4588 | } | |
4589 | ||
4590 | case ']': | |
4591 | { | |
4592 | int i; | |
4593 | char *p; | |
4594 | ||
4595 | if (command_loop_level > 5) | |
4596 | return " ...]]]"; | |
4597 | p = decode_mode_spec_buf; | |
4598 | for (i = 0; i < command_loop_level; i++) | |
4599 | *p++ = ']'; | |
4600 | *p = 0; | |
4601 | return decode_mode_spec_buf; | |
4602 | } | |
4603 | ||
4604 | case '-': | |
4605 | { | |
4606 | register char *p; | |
4607 | register int i; | |
4608 | ||
4609 | if (maxwidth < sizeof (lots_of_dashes)) | |
4610 | return lots_of_dashes; | |
4611 | else | |
4612 | { | |
4613 | for (p = decode_mode_spec_buf, i = maxwidth; i > 0; i--) | |
4614 | *p++ = '-'; | |
4615 | *p = '\0'; | |
4616 | } | |
4617 | return decode_mode_spec_buf; | |
4618 | } | |
4619 | ||
a2889657 | 4620 | case 'b': |
d39b6696 | 4621 | obj = b->name; |
a2889657 | 4622 | #if 0 |
0a9dc68b | 4623 | if (maxwidth >= 3 && XSTRING (obj)->size_byte > maxwidth) |
a2889657 JB |
4624 | { |
4625 | bcopy (XSTRING (obj)->data, decode_mode_spec_buf, maxwidth - 1); | |
4626 | decode_mode_spec_buf[maxwidth - 1] = '\\'; | |
4627 | decode_mode_spec_buf[maxwidth] = '\0'; | |
4628 | return decode_mode_spec_buf; | |
4629 | } | |
4630 | #endif | |
4631 | break; | |
4632 | ||
1af9f229 RS |
4633 | case 'c': |
4634 | { | |
4635 | int col = current_column (); | |
4636 | XSETFASTINT (w->column_number_displayed, col); | |
766525bc | 4637 | pint2str (decode_mode_spec_buf, spec_width, col); |
1af9f229 RS |
4638 | return decode_mode_spec_buf; |
4639 | } | |
4640 | ||
4641 | case 'F': | |
4642 | /* %F displays the frame name. */ | |
261bfd0e EZ |
4643 | /* Systems that can only display a single frame at a time should |
4644 | NOT replace the frame name with the (constant) frame title, | |
4645 | since then they won't be able to tell which frame is that. */ | |
4646 | if (FRAME_WINDOW_P (f) && !NILP (f->title)) | |
95184b48 | 4647 | return (char *) XSTRING (f->title)->data; |
fd8ff63d | 4648 | if (f->explicit_name || ! FRAME_WINDOW_P (f)) |
95184b48 | 4649 | return (char *) XSTRING (f->name)->data; |
9c6da96f | 4650 | return "Emacs"; |
1af9f229 | 4651 | |
a2889657 | 4652 | case 'f': |
d39b6696 | 4653 | obj = b->filename; |
a2889657 | 4654 | #if 0 |
265a9e55 | 4655 | if (NILP (obj)) |
a2889657 | 4656 | return "[none]"; |
0a9dc68b | 4657 | else if (STRINGP (obj) && XSTRING (obj)->size_byte > maxwidth) |
a2889657 JB |
4658 | { |
4659 | bcopy ("...", decode_mode_spec_buf, 3); | |
0a9dc68b | 4660 | bcopy (XSTRING (obj)->data + XSTRING (obj)->size_byte - maxwidth + 3, |
a2889657 JB |
4661 | decode_mode_spec_buf + 3, maxwidth - 3); |
4662 | return decode_mode_spec_buf; | |
4663 | } | |
4664 | #endif | |
4665 | break; | |
4666 | ||
aa6d10fa RS |
4667 | case 'l': |
4668 | { | |
12adba34 RS |
4669 | int startpos = XMARKER (w->start)->charpos; |
4670 | int startpos_byte = marker_byte_position (w->start); | |
4671 | int line, linepos, linepos_byte, topline; | |
aa6d10fa RS |
4672 | int nlines, junk; |
4673 | Lisp_Object tem; | |
4674 | int height = XFASTINT (w->height); | |
4675 | ||
4676 | /* If we decided that this buffer isn't suitable for line numbers, | |
4677 | don't forget that too fast. */ | |
4678 | if (EQ (w->base_line_pos, w->buffer)) | |
766525bc | 4679 | goto no_value; |
5300fd39 RS |
4680 | /* But do forget it, if the window shows a different buffer now. */ |
4681 | else if (BUFFERP (w->base_line_pos)) | |
4682 | w->base_line_pos = Qnil; | |
aa6d10fa RS |
4683 | |
4684 | /* If the buffer is very big, don't waste time. */ | |
d39b6696 | 4685 | if (BUF_ZV (b) - BUF_BEGV (b) > line_number_display_limit) |
aa6d10fa RS |
4686 | { |
4687 | w->base_line_pos = Qnil; | |
4688 | w->base_line_number = Qnil; | |
766525bc | 4689 | goto no_value; |
aa6d10fa RS |
4690 | } |
4691 | ||
4692 | if (!NILP (w->base_line_number) | |
4693 | && !NILP (w->base_line_pos) | |
12adba34 | 4694 | && XFASTINT (w->base_line_pos) <= startpos) |
aa6d10fa RS |
4695 | { |
4696 | line = XFASTINT (w->base_line_number); | |
4697 | linepos = XFASTINT (w->base_line_pos); | |
12adba34 | 4698 | linepos_byte = buf_charpos_to_bytepos (b, linepos); |
aa6d10fa RS |
4699 | } |
4700 | else | |
4701 | { | |
4702 | line = 1; | |
d39b6696 | 4703 | linepos = BUF_BEGV (b); |
12adba34 | 4704 | linepos_byte = BUF_BEGV_BYTE (b); |
aa6d10fa RS |
4705 | } |
4706 | ||
4707 | /* Count lines from base line to window start position. */ | |
12adba34 RS |
4708 | nlines = display_count_lines (linepos, linepos_byte, |
4709 | startpos_byte, | |
4710 | startpos, &junk); | |
aa6d10fa RS |
4711 | |
4712 | topline = nlines + line; | |
4713 | ||
4714 | /* Determine a new base line, if the old one is too close | |
4715 | or too far away, or if we did not have one. | |
4716 | "Too close" means it's plausible a scroll-down would | |
4717 | go back past it. */ | |
d39b6696 | 4718 | if (startpos == BUF_BEGV (b)) |
aa6d10fa | 4719 | { |
c2213350 KH |
4720 | XSETFASTINT (w->base_line_number, topline); |
4721 | XSETFASTINT (w->base_line_pos, BUF_BEGV (b)); | |
aa6d10fa RS |
4722 | } |
4723 | else if (nlines < height + 25 || nlines > height * 3 + 50 | |
d39b6696 | 4724 | || linepos == BUF_BEGV (b)) |
aa6d10fa | 4725 | { |
d39b6696 | 4726 | int limit = BUF_BEGV (b); |
12adba34 | 4727 | int limit_byte = BUF_BEGV_BYTE (b); |
aa6d10fa RS |
4728 | int position; |
4729 | int distance = (height * 2 + 30) * 200; | |
4730 | ||
4731 | if (startpos - distance > limit) | |
12adba34 RS |
4732 | { |
4733 | limit = startpos - distance; | |
4734 | limit_byte = CHAR_TO_BYTE (limit); | |
4735 | } | |
aa6d10fa | 4736 | |
12adba34 RS |
4737 | nlines = display_count_lines (startpos, startpos_byte, |
4738 | limit_byte, | |
4739 | - (height * 2 + 30), | |
aa6d10fa RS |
4740 | &position); |
4741 | /* If we couldn't find the lines we wanted within | |
4742 | 200 chars per line, | |
4743 | give up on line numbers for this window. */ | |
12adba34 | 4744 | if (position == limit_byte && limit == startpos - distance) |
aa6d10fa RS |
4745 | { |
4746 | w->base_line_pos = w->buffer; | |
4747 | w->base_line_number = Qnil; | |
766525bc | 4748 | goto no_value; |
aa6d10fa RS |
4749 | } |
4750 | ||
c2213350 | 4751 | XSETFASTINT (w->base_line_number, topline - nlines); |
12adba34 | 4752 | XSETFASTINT (w->base_line_pos, BYTE_TO_CHAR (position)); |
aa6d10fa RS |
4753 | } |
4754 | ||
4755 | /* Now count lines from the start pos to point. */ | |
12adba34 RS |
4756 | nlines = display_count_lines (startpos, startpos_byte, |
4757 | PT_BYTE, PT, &junk); | |
aa6d10fa RS |
4758 | |
4759 | /* Record that we did display the line number. */ | |
4760 | line_number_displayed = 1; | |
4761 | ||
4762 | /* Make the string to show. */ | |
766525bc | 4763 | pint2str (decode_mode_spec_buf, spec_width, topline + nlines); |
aa6d10fa | 4764 | return decode_mode_spec_buf; |
766525bc RS |
4765 | no_value: |
4766 | { | |
4767 | char* p = decode_mode_spec_buf; | |
4768 | for (spec_width -= 2; spec_width > 0; --spec_width) *p++ = ' '; | |
4769 | strcpy (p, "??"); | |
4770 | return decode_mode_spec_buf; | |
4771 | } | |
aa6d10fa RS |
4772 | } |
4773 | break; | |
4774 | ||
a2889657 | 4775 | case 'm': |
d39b6696 | 4776 | obj = b->mode_name; |
a2889657 JB |
4777 | break; |
4778 | ||
4779 | case 'n': | |
d39b6696 | 4780 | if (BUF_BEGV (b) > BUF_BEG (b) || BUF_ZV (b) < BUF_Z (b)) |
a2889657 JB |
4781 | return " Narrow"; |
4782 | break; | |
4783 | ||
a2889657 JB |
4784 | case 'p': |
4785 | { | |
4786 | int pos = marker_position (w->start); | |
d39b6696 | 4787 | int total = BUF_ZV (b) - BUF_BEGV (b); |
a2889657 | 4788 | |
d39b6696 | 4789 | if (XFASTINT (w->window_end_pos) <= BUF_Z (b) - BUF_ZV (b)) |
a2889657 | 4790 | { |
d39b6696 | 4791 | if (pos <= BUF_BEGV (b)) |
a2889657 JB |
4792 | return "All"; |
4793 | else | |
4794 | return "Bottom"; | |
4795 | } | |
d39b6696 | 4796 | else if (pos <= BUF_BEGV (b)) |
a2889657 JB |
4797 | return "Top"; |
4798 | else | |
4799 | { | |
3c7d31b9 RS |
4800 | if (total > 1000000) |
4801 | /* Do it differently for a large value, to avoid overflow. */ | |
4802 | total = ((pos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
4803 | else | |
4804 | total = ((pos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
a2889657 JB |
4805 | /* We can't normally display a 3-digit number, |
4806 | so get us a 2-digit number that is close. */ | |
4807 | if (total == 100) | |
4808 | total = 99; | |
4809 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
4810 | return decode_mode_spec_buf; | |
4811 | } | |
4812 | } | |
4813 | ||
8ffcb79f RS |
4814 | /* Display percentage of size above the bottom of the screen. */ |
4815 | case 'P': | |
4816 | { | |
4817 | int toppos = marker_position (w->start); | |
d39b6696 KH |
4818 | int botpos = BUF_Z (b) - XFASTINT (w->window_end_pos); |
4819 | int total = BUF_ZV (b) - BUF_BEGV (b); | |
8ffcb79f | 4820 | |
d39b6696 | 4821 | if (botpos >= BUF_ZV (b)) |
8ffcb79f | 4822 | { |
d39b6696 | 4823 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
4824 | return "All"; |
4825 | else | |
4826 | return "Bottom"; | |
4827 | } | |
4828 | else | |
4829 | { | |
3c7d31b9 RS |
4830 | if (total > 1000000) |
4831 | /* Do it differently for a large value, to avoid overflow. */ | |
4832 | total = ((botpos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
4833 | else | |
4834 | total = ((botpos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
8ffcb79f RS |
4835 | /* We can't normally display a 3-digit number, |
4836 | so get us a 2-digit number that is close. */ | |
4837 | if (total == 100) | |
4838 | total = 99; | |
d39b6696 | 4839 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
4840 | sprintf (decode_mode_spec_buf, "Top%2d%%", total); |
4841 | else | |
4842 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
4843 | return decode_mode_spec_buf; | |
4844 | } | |
4845 | } | |
4846 | ||
1af9f229 RS |
4847 | case 's': |
4848 | /* status of process */ | |
4849 | obj = Fget_buffer_process (w->buffer); | |
4850 | if (NILP (obj)) | |
4851 | return "no process"; | |
4852 | #ifdef subprocesses | |
4853 | obj = Fsymbol_name (Fprocess_status (obj)); | |
4854 | #endif | |
4855 | break; | |
d39b6696 | 4856 | |
1af9f229 RS |
4857 | case 't': /* indicate TEXT or BINARY */ |
4858 | #ifdef MODE_LINE_BINARY_TEXT | |
4859 | return MODE_LINE_BINARY_TEXT (b); | |
4860 | #else | |
4861 | return "T"; | |
4862 | #endif | |
1c9241f5 KH |
4863 | |
4864 | case 'z': | |
4865 | /* coding-system (not including end-of-line format) */ | |
4866 | case 'Z': | |
4867 | /* coding-system (including end-of-line type) */ | |
4868 | { | |
4869 | int eol_flag = (c == 'Z'); | |
539b4d41 | 4870 | char *p = decode_mode_spec_buf; |
1c9241f5 | 4871 | |
d30e754b | 4872 | if (! FRAME_WINDOW_P (f)) |
1c9241f5 | 4873 | { |
11c52c4f RS |
4874 | /* No need to mention EOL here--the terminal never needs |
4875 | to do EOL conversion. */ | |
4876 | p = decode_mode_spec_coding (keyboard_coding.symbol, p, 0); | |
4877 | p = decode_mode_spec_coding (terminal_coding.symbol, p, 0); | |
1c9241f5 | 4878 | } |
f13c925f | 4879 | p = decode_mode_spec_coding (b->buffer_file_coding_system, |
539b4d41 | 4880 | p, eol_flag); |
f13c925f | 4881 | |
11c52c4f | 4882 | #if 0 /* This proves to be annoying; I think we can do without. -- rms. */ |
1c9241f5 KH |
4883 | #ifdef subprocesses |
4884 | obj = Fget_buffer_process (Fcurrent_buffer ()); | |
4885 | if (PROCESSP (obj)) | |
4886 | { | |
4887 | p = decode_mode_spec_coding (XPROCESS (obj)->decode_coding_system, | |
4888 | p, eol_flag); | |
4889 | p = decode_mode_spec_coding (XPROCESS (obj)->encode_coding_system, | |
4890 | p, eol_flag); | |
4891 | } | |
4892 | #endif /* subprocesses */ | |
11c52c4f | 4893 | #endif /* 0 */ |
1c9241f5 KH |
4894 | *p = 0; |
4895 | return decode_mode_spec_buf; | |
4896 | } | |
a2889657 | 4897 | } |
d39b6696 | 4898 | |
e24c997d | 4899 | if (STRINGP (obj)) |
a2889657 JB |
4900 | return (char *) XSTRING (obj)->data; |
4901 | else | |
4902 | return ""; | |
4903 | } | |
59b49f63 | 4904 | \f |
12adba34 RS |
4905 | /* Count up to COUNT lines starting from START / START_BYTE. |
4906 | But don't go beyond LIMIT_BYTE. | |
4907 | Return the number of lines thus found (always nonnegative). | |
59b49f63 | 4908 | |
12adba34 | 4909 | Set *BYTE_POS_PTR to 1 if we found COUNT lines, 0 if we hit LIMIT. */ |
59b49f63 RS |
4910 | |
4911 | static int | |
12adba34 RS |
4912 | display_count_lines (start, start_byte, limit_byte, count, byte_pos_ptr) |
4913 | int start, start_byte, limit_byte, count; | |
4914 | int *byte_pos_ptr; | |
59b49f63 | 4915 | { |
59b49f63 RS |
4916 | register unsigned char *cursor; |
4917 | unsigned char *base; | |
4918 | ||
4919 | register int ceiling; | |
4920 | register unsigned char *ceiling_addr; | |
12adba34 | 4921 | int orig_count = count; |
59b49f63 RS |
4922 | |
4923 | /* If we are not in selective display mode, | |
4924 | check only for newlines. */ | |
12adba34 RS |
4925 | int selective_display = (!NILP (current_buffer->selective_display) |
4926 | && !INTEGERP (current_buffer->selective_display)); | |
59b49f63 RS |
4927 | |
4928 | if (count > 0) | |
12adba34 RS |
4929 | { |
4930 | while (start_byte < limit_byte) | |
4931 | { | |
4932 | ceiling = BUFFER_CEILING_OF (start_byte); | |
4933 | ceiling = min (limit_byte - 1, ceiling); | |
4934 | ceiling_addr = BYTE_POS_ADDR (ceiling) + 1; | |
4935 | base = (cursor = BYTE_POS_ADDR (start_byte)); | |
4936 | while (1) | |
4937 | { | |
4938 | if (selective_display) | |
4939 | while (*cursor != '\n' && *cursor != 015 && ++cursor != ceiling_addr) | |
4940 | ; | |
4941 | else | |
4942 | while (*cursor != '\n' && ++cursor != ceiling_addr) | |
4943 | ; | |
4944 | ||
4945 | if (cursor != ceiling_addr) | |
4946 | { | |
4947 | if (--count == 0) | |
4948 | { | |
4949 | start_byte += cursor - base + 1; | |
4950 | *byte_pos_ptr = start_byte; | |
4951 | return orig_count; | |
4952 | } | |
4953 | else | |
4954 | if (++cursor == ceiling_addr) | |
4955 | break; | |
4956 | } | |
4957 | else | |
4958 | break; | |
4959 | } | |
4960 | start_byte += cursor - base; | |
4961 | } | |
4962 | } | |
59b49f63 RS |
4963 | else |
4964 | { | |
12adba34 RS |
4965 | while (start_byte > limit_byte) |
4966 | { | |
4967 | ceiling = BUFFER_FLOOR_OF (start_byte - 1); | |
4968 | ceiling = max (limit_byte, ceiling); | |
4969 | ceiling_addr = BYTE_POS_ADDR (ceiling) - 1; | |
4970 | base = (cursor = BYTE_POS_ADDR (start_byte - 1) + 1); | |
59b49f63 RS |
4971 | while (1) |
4972 | { | |
12adba34 RS |
4973 | if (selective_display) |
4974 | while (--cursor != ceiling_addr | |
4975 | && *cursor != '\n' && *cursor != 015) | |
4976 | ; | |
4977 | else | |
4978 | while (--cursor != ceiling_addr && *cursor != '\n') | |
4979 | ; | |
4980 | ||
59b49f63 RS |
4981 | if (cursor != ceiling_addr) |
4982 | { | |
4983 | if (++count == 0) | |
4984 | { | |
12adba34 RS |
4985 | start_byte += cursor - base + 1; |
4986 | *byte_pos_ptr = start_byte; | |
4987 | /* When scanning backwards, we should | |
4988 | not count the newline posterior to which we stop. */ | |
4989 | return - orig_count - 1; | |
59b49f63 RS |
4990 | } |
4991 | } | |
4992 | else | |
4993 | break; | |
4994 | } | |
12adba34 RS |
4995 | /* Here we add 1 to compensate for the last decrement |
4996 | of CURSOR, which took it past the valid range. */ | |
4997 | start_byte += cursor - base + 1; | |
59b49f63 RS |
4998 | } |
4999 | } | |
5000 | ||
12adba34 | 5001 | *byte_pos_ptr = limit_byte; |
aa6d10fa | 5002 | |
12adba34 RS |
5003 | if (count < 0) |
5004 | return - orig_count + count; | |
5005 | return orig_count - count; | |
aa6d10fa | 5006 | |
12adba34 | 5007 | } |
a2889657 JB |
5008 | \f |
5009 | /* Display STRING on one line of window W, starting at HPOS. | |
5010 | Display at position VPOS. Caller should have done get_display_line. | |
11e82b76 | 5011 | If VPOS == -1, display it as the current frame's title. |
90adcf20 | 5012 | LENGTH is the length of STRING, or -1 meaning STRING is null-terminated. |
a2889657 JB |
5013 | |
5014 | TRUNCATE is GLYPH to display at end if truncated. Zero for none. | |
5015 | ||
5016 | MINCOL is the first column ok to end at. (Pad with spaces to this col.) | |
5017 | MAXCOL is the last column ok to end at. Truncate here. | |
5018 | -1 for MINCOL or MAXCOL means no explicit minimum or maximum. | |
44fa5b1e | 5019 | Both count from the left edge of the frame, as does HPOS. |
a2889657 JB |
5020 | The right edge of W is an implicit maximum. |
5021 | If TRUNCATE is nonzero, the implicit maximum is one column before the edge. | |
5022 | ||
278feba9 RS |
5023 | OBEY_WINDOW_WIDTH says to put spaces or vertical bars |
5024 | at the place where the current window ends in this line | |
5025 | and not display anything beyond there. Otherwise, only MAXCOL | |
5026 | controls where to stop output. | |
5027 | ||
a3788d53 RS |
5028 | MULTIBYTE can be 0 meaning do not display multibyte chars, |
5029 | 1 meaning do display them, or -1 meaning obey the current buffer's | |
5030 | value of enable_multibyte_characters. | |
5031 | ||
278feba9 | 5032 | Returns ending hpos. */ |
a2889657 JB |
5033 | |
5034 | static int | |
278feba9 | 5035 | display_string (w, vpos, string, length, hpos, truncate, |
a3788d53 | 5036 | obey_window_width, mincol, maxcol, multibyte) |
a2889657 JB |
5037 | struct window *w; |
5038 | unsigned char *string; | |
90adcf20 | 5039 | int length; |
a2889657 JB |
5040 | int vpos, hpos; |
5041 | GLYPH truncate; | |
278feba9 | 5042 | int obey_window_width; |
a2889657 | 5043 | int mincol, maxcol; |
a3788d53 | 5044 | int multibyte; |
a2889657 JB |
5045 | { |
5046 | register int c; | |
d3413a53 | 5047 | int truncated; |
a2889657 JB |
5048 | register GLYPH *p1; |
5049 | int hscroll = XINT (w->hscroll); | |
253c7d2f | 5050 | int tab_width = XINT (XBUFFER (w->buffer)->tab_width); |
a2889657 JB |
5051 | register GLYPH *start; |
5052 | register GLYPH *end; | |
b1d1124b JB |
5053 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
5054 | struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (f); | |
a2889657 JB |
5055 | GLYPH *p1start = desired_glyphs->glyphs[vpos] + hpos; |
5056 | int window_width = XFASTINT (w->width); | |
5057 | ||
5058 | /* Use the standard display table, not the window's display table. | |
5059 | We don't want the mode line in rot13. */ | |
f908610f | 5060 | register struct Lisp_Char_Table *dp = 0; |
efc63ef0 | 5061 | int i; |
a2889657 | 5062 | |
a3788d53 RS |
5063 | if (multibyte == -1) |
5064 | multibyte = !NILP (current_buffer->enable_multibyte_characters); | |
5065 | /* Now multibyte is 1 if we should display multibyte characters. */ | |
5066 | ||
f908610f RS |
5067 | if (DISP_TABLE_P (Vstandard_display_table)) |
5068 | dp = XCHAR_TABLE (Vstandard_display_table); | |
a2889657 | 5069 | |
54ff581a | 5070 | if (tab_width <= 0 || tab_width > 1000) tab_width = 8; |
a2889657 JB |
5071 | |
5072 | p1 = p1start; | |
a27062f0 | 5073 | start = desired_glyphs->glyphs[vpos]; |
a2889657 | 5074 | |
278feba9 | 5075 | if (obey_window_width) |
b1d1124b | 5076 | { |
a27062f0 | 5077 | start += XFASTINT (w->left); |
278feba9 RS |
5078 | end = start + window_width - (truncate != 0); |
5079 | ||
73f194f1 | 5080 | if (!WINDOW_RIGHTMOST_P (w)) |
b1d1124b | 5081 | { |
73f194f1 | 5082 | if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_RIGHT (f)) |
278feba9 RS |
5083 | { |
5084 | int i; | |
b1d1124b | 5085 | |
5802e919 | 5086 | for (i = 0; i < FRAME_SCROLL_BAR_COLS (f); i++) |
278feba9 RS |
5087 | *end-- = ' '; |
5088 | } | |
73f194f1 | 5089 | else if (!FRAME_HAS_VERTICAL_SCROLL_BARS (f)) |
278feba9 | 5090 | *end-- = '|'; |
b1d1124b | 5091 | } |
b1d1124b | 5092 | } |
a2889657 | 5093 | |
278feba9 RS |
5094 | if (! obey_window_width |
5095 | || (maxcol >= 0 && end - desired_glyphs->glyphs[vpos] > maxcol)) | |
a2889657 | 5096 | end = desired_glyphs->glyphs[vpos] + maxcol; |
278feba9 | 5097 | |
efc63ef0 | 5098 | /* Store 0 in charstart for these columns. */ |
bd5dec8e | 5099 | for (i = (hpos >= 0 ? hpos : 0); i < end - p1start + hpos; i++) |
efc63ef0 RS |
5100 | desired_glyphs->charstarts[vpos][i] = 0; |
5101 | ||
a2889657 JB |
5102 | if (maxcol >= 0 && mincol > maxcol) |
5103 | mincol = maxcol; | |
5104 | ||
1c9241f5 KH |
5105 | if (length < 0) |
5106 | /* We need this value for multibyte characters. */ | |
5107 | length = strlen (string); | |
5108 | ||
d3413a53 RS |
5109 | /* We set truncated to 1 if we get stopped by trying to pass END |
5110 | (that is, trying to pass MAXCOL.) */ | |
5111 | truncated = 0; | |
5112 | while (1) | |
a2889657 | 5113 | { |
1c9241f5 KH |
5114 | int len; |
5115 | ||
5116 | if (length <= 0) | |
90adcf20 | 5117 | break; |
1c9241f5 KH |
5118 | if (multibyte) |
5119 | c = STRING_CHAR_AND_LENGTH (string, length, len); | |
5120 | else | |
5121 | c = *string, len = 1; | |
5122 | ||
5123 | string += len, length -= len; | |
90adcf20 | 5124 | |
d3413a53 RS |
5125 | if (p1 >= end) |
5126 | { | |
5127 | truncated = 1; | |
5128 | break; | |
5129 | } | |
5130 | ||
376b0e59 RS |
5131 | if (dp != 0 && VECTORP (DISP_CHAR_VECTOR (dp, c))) |
5132 | { | |
5133 | p1 = copy_part_of_rope (f, p1, start, | |
5134 | XVECTOR (DISP_CHAR_VECTOR (dp, c))->contents, | |
5135 | XVECTOR (DISP_CHAR_VECTOR (dp, c))->size, | |
5136 | 0); | |
5137 | } | |
5138 | else if (c >= 040 && c < 0177) | |
a2889657 JB |
5139 | { |
5140 | if (p1 >= start) | |
5141 | *p1 = c; | |
5142 | p1++; | |
5143 | } | |
5144 | else if (c == '\t') | |
5145 | { | |
5146 | do | |
5147 | { | |
5148 | if (p1 >= start && p1 < end) | |
5149 | *p1 = SPACEGLYPH; | |
5150 | p1++; | |
5151 | } | |
5152 | while ((p1 - start + hscroll - (hscroll > 0)) % tab_width); | |
5153 | } | |
ded34426 | 5154 | else if (c < 0200 && ! NILP (buffer_defaults.ctl_arrow)) |
a2889657 JB |
5155 | { |
5156 | if (p1 >= start) | |
e57bca5d KH |
5157 | *p1 = (fix_glyph |
5158 | (f, (dp && INTEGERP (DISP_CTRL_GLYPH (dp)) | |
5159 | && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (dp))) | |
5160 | ? XINT (DISP_CTRL_GLYPH (dp)) : '^'), | |
5161 | 0)); | |
a2889657 | 5162 | p1++; |
6e8290aa | 5163 | if (p1 >= start && p1 < end) |
a2889657 JB |
5164 | *p1 = c ^ 0100; |
5165 | p1++; | |
5166 | } | |
1c9241f5 | 5167 | else if (len == 1) |
a2889657 | 5168 | { |
1c9241f5 | 5169 | /* C is a control character or a binary byte data. */ |
a2889657 | 5170 | if (p1 >= start) |
e57bca5d KH |
5171 | *p1 = (fix_glyph |
5172 | (f, (dp && INTEGERP (DISP_ESCAPE_GLYPH (dp)) | |
5173 | && GLYPH_CHAR_VALID_P (XINT (DISP_ESCAPE_GLYPH (dp))) | |
5174 | ? XINT (DISP_ESCAPE_GLYPH (dp)) : '\\'), | |
5175 | 0)); | |
a2889657 | 5176 | p1++; |
6e8290aa | 5177 | if (p1 >= start && p1 < end) |
a2889657 JB |
5178 | *p1 = (c >> 6) + '0'; |
5179 | p1++; | |
6e8290aa | 5180 | if (p1 >= start && p1 < end) |
a2889657 JB |
5181 | *p1 = (7 & (c >> 3)) + '0'; |
5182 | p1++; | |
6e8290aa | 5183 | if (p1 >= start && p1 < end) |
a2889657 JB |
5184 | *p1 = (7 & c) + '0'; |
5185 | p1++; | |
5186 | } | |
1c9241f5 KH |
5187 | else |
5188 | { | |
5189 | /* C is a multibyte character. */ | |
5190 | int charset = CHAR_CHARSET (c); | |
5191 | int columns = (charset == CHARSET_COMPOSITION | |
5192 | ? cmpchar_table[COMPOSITE_CHAR_ID (c)]->width | |
5193 | : CHARSET_WIDTH (charset)); | |
5194 | ||
5195 | if (p1 < start) | |
5196 | { | |
5197 | /* Since we can't show the left part of C, fill all | |
5198 | columns with spaces. */ | |
5199 | columns -= start - p1; | |
5200 | p1 = start; | |
5201 | while (columns--) | |
5202 | { | |
5203 | if (p1 < end) | |
5204 | *p1 = SPACEGLYPH; | |
5205 | p1++; | |
5206 | } | |
5207 | } | |
5208 | else if (p1 + columns > end) | |
5209 | { | |
5210 | /* Since we can't show the right part of C, fill all | |
5211 | columns with TRUNCATE if TRUNCATE is specified. */ | |
5212 | if (truncate) | |
5213 | { | |
5214 | while (p1 < end) | |
5215 | *p1++ = fix_glyph (f, truncate, 0); | |
5216 | /* And tell the line is truncated. */ | |
5217 | truncated = 1; | |
5218 | } | |
5219 | break; | |
5220 | } | |
5221 | else | |
5222 | { | |
5223 | /* We can show the whole glyph of C. */ | |
5224 | *p1++ = c; | |
5225 | while (--columns) | |
5226 | *p1++ = c | GLYPH_MASK_PADDING; | |
5227 | } | |
5228 | } | |
a2889657 JB |
5229 | } |
5230 | ||
d3413a53 | 5231 | if (truncated) |
a2889657 JB |
5232 | { |
5233 | p1 = end; | |
278feba9 | 5234 | if (truncate) *p1++ = fix_glyph (f, truncate, 0); |
a2889657 JB |
5235 | } |
5236 | else if (mincol >= 0) | |
5237 | { | |
5238 | end = desired_glyphs->glyphs[vpos] + mincol; | |
5239 | while (p1 < end) | |
5240 | *p1++ = SPACEGLYPH; | |
5241 | } | |
5242 | ||
5243 | { | |
5244 | register int len = p1 - desired_glyphs->glyphs[vpos]; | |
5245 | ||
5246 | if (len > desired_glyphs->used[vpos]) | |
5247 | desired_glyphs->used[vpos] = len; | |
5248 | desired_glyphs->glyphs[vpos][desired_glyphs->used[vpos]] = 0; | |
5249 | ||
5250 | return len; | |
5251 | } | |
5252 | } | |
5253 | \f | |
642eefc6 RS |
5254 | /* This is like a combination of memq and assq. |
5255 | Return 1 if PROPVAL appears as an element of LIST | |
5256 | or as the car of an element of LIST. | |
af460d46 RS |
5257 | If PROPVAL is a list, compare each element against LIST |
5258 | in that way, and return 1 if any element of PROPVAL is found in LIST. | |
642eefc6 RS |
5259 | Otherwise return 0. |
5260 | This function cannot quit. */ | |
5261 | ||
5262 | int | |
5263 | invisible_p (propval, list) | |
5264 | register Lisp_Object propval; | |
5265 | Lisp_Object list; | |
5266 | { | |
af460d46 RS |
5267 | register Lisp_Object tail, proptail; |
5268 | for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr) | |
642eefc6 RS |
5269 | { |
5270 | register Lisp_Object tem; | |
af460d46 | 5271 | tem = XCONS (tail)->car; |
642eefc6 RS |
5272 | if (EQ (propval, tem)) |
5273 | return 1; | |
5274 | if (CONSP (tem) && EQ (propval, XCONS (tem)->car)) | |
5275 | return 1; | |
5276 | } | |
af460d46 RS |
5277 | if (CONSP (propval)) |
5278 | for (proptail = propval; CONSP (proptail); | |
5279 | proptail = XCONS (proptail)->cdr) | |
5280 | { | |
5281 | Lisp_Object propelt; | |
5282 | propelt = XCONS (proptail)->car; | |
5283 | for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr) | |
5284 | { | |
5285 | register Lisp_Object tem; | |
5286 | tem = XCONS (tail)->car; | |
5287 | if (EQ (propelt, tem)) | |
5288 | return 1; | |
5289 | if (CONSP (tem) && EQ (propelt, XCONS (tem)->car)) | |
5290 | return 1; | |
5291 | } | |
5292 | } | |
642eefc6 RS |
5293 | return 0; |
5294 | } | |
5295 | ||
5296 | /* Return 1 if PROPVAL appears as the car of an element of LIST | |
5297 | and the cdr of that element is non-nil. | |
af460d46 RS |
5298 | If PROPVAL is a list, check each element of PROPVAL in that way, |
5299 | and the first time some element is found, | |
5300 | return 1 if the cdr of that element is non-nil. | |
642eefc6 RS |
5301 | Otherwise return 0. |
5302 | This function cannot quit. */ | |
5303 | ||
5304 | int | |
5305 | invisible_ellipsis_p (propval, list) | |
5306 | register Lisp_Object propval; | |
5307 | Lisp_Object list; | |
5308 | { | |
af460d46 RS |
5309 | register Lisp_Object tail, proptail; |
5310 | for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr) | |
642eefc6 RS |
5311 | { |
5312 | register Lisp_Object tem; | |
af460d46 | 5313 | tem = XCONS (tail)->car; |
642eefc6 RS |
5314 | if (CONSP (tem) && EQ (propval, XCONS (tem)->car)) |
5315 | return ! NILP (XCONS (tem)->cdr); | |
5316 | } | |
af460d46 RS |
5317 | if (CONSP (propval)) |
5318 | for (proptail = propval; CONSP (proptail); | |
5319 | proptail = XCONS (proptail)->cdr) | |
5320 | { | |
5321 | Lisp_Object propelt; | |
5322 | propelt = XCONS (proptail)->car; | |
5323 | for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr) | |
5324 | { | |
5325 | register Lisp_Object tem; | |
5326 | tem = XCONS (tail)->car; | |
5327 | if (CONSP (tem) && EQ (propelt, XCONS (tem)->car)) | |
5328 | return ! NILP (XCONS (tem)->cdr); | |
5329 | } | |
5330 | } | |
642eefc6 RS |
5331 | return 0; |
5332 | } | |
5333 | \f | |
a2889657 JB |
5334 | void |
5335 | syms_of_xdisp () | |
5336 | { | |
cf074754 RS |
5337 | staticpro (&Qmenu_bar_update_hook); |
5338 | Qmenu_bar_update_hook = intern ("menu-bar-update-hook"); | |
5339 | ||
d46fb96a | 5340 | staticpro (&Qoverriding_terminal_local_map); |
7079aefa | 5341 | Qoverriding_terminal_local_map = intern ("overriding-terminal-local-map"); |
d46fb96a | 5342 | |
399164b4 KH |
5343 | staticpro (&Qoverriding_local_map); |
5344 | Qoverriding_local_map = intern ("overriding-local-map"); | |
5345 | ||
75c43375 RS |
5346 | staticpro (&Qwindow_scroll_functions); |
5347 | Qwindow_scroll_functions = intern ("window-scroll-functions"); | |
5348 | ||
e0bfbde6 RS |
5349 | staticpro (&Qredisplay_end_trigger_functions); |
5350 | Qredisplay_end_trigger_functions = intern ("redisplay-end-trigger-functions"); | |
67481ae5 | 5351 | |
a2889657 JB |
5352 | staticpro (&last_arrow_position); |
5353 | staticpro (&last_arrow_string); | |
5354 | last_arrow_position = Qnil; | |
5355 | last_arrow_string = Qnil; | |
5356 | ||
5357 | DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string, | |
8c45d522 | 5358 | "String (or mode line construct) included (normally) in `mode-line-format'."); |
a2889657 JB |
5359 | Vglobal_mode_string = Qnil; |
5360 | ||
5361 | DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position, | |
5362 | "Marker for where to display an arrow on top of the buffer text.\n\ | |
5363 | This must be the beginning of a line in order to work.\n\ | |
5364 | See also `overlay-arrow-string'."); | |
5365 | Voverlay_arrow_position = Qnil; | |
5366 | ||
5367 | DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string, | |
5368 | "String to display as an arrow. See also `overlay-arrow-position'."); | |
5369 | Voverlay_arrow_string = Qnil; | |
5370 | ||
5371 | DEFVAR_INT ("scroll-step", &scroll_step, | |
5372 | "*The number of lines to try scrolling a window by when point moves out.\n\ | |
44fa5b1e JB |
5373 | If that fails to bring point back on frame, point is centered instead.\n\ |
5374 | If this is zero, point is always centered after it moves off frame."); | |
a2889657 | 5375 | |
0789adb2 RS |
5376 | DEFVAR_INT ("scroll-conservatively", &scroll_conservatively, |
5377 | "*Scroll up to this many lines, to bring point back on screen."); | |
5378 | scroll_conservatively = 0; | |
5379 | ||
9afd2168 RS |
5380 | DEFVAR_INT ("scroll-margin", &scroll_margin, |
5381 | "*Number of lines of margin at the top and bottom of a window.\n\ | |
5382 | Recenter the window whenever point gets within this many lines\n\ | |
5383 | of the top or bottom of the window."); | |
5384 | scroll_margin = 0; | |
5385 | ||
a2889657 JB |
5386 | DEFVAR_INT ("debug-end-pos", &debug_end_pos, "Don't ask"); |
5387 | ||
5388 | DEFVAR_BOOL ("truncate-partial-width-windows", | |
5389 | &truncate_partial_width_windows, | |
44fa5b1e | 5390 | "*Non-nil means truncate lines in all windows less than full frame wide."); |
a2889657 JB |
5391 | truncate_partial_width_windows = 1; |
5392 | ||
5393 | DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video, | |
5394 | "*Non-nil means use inverse video for the mode line."); | |
5395 | mode_line_inverse_video = 1; | |
aa6d10fa RS |
5396 | |
5397 | DEFVAR_INT ("line-number-display-limit", &line_number_display_limit, | |
5398 | "*Maximum buffer size for which line number should be displayed."); | |
5399 | line_number_display_limit = 1000000; | |
fba9ce76 RS |
5400 | |
5401 | DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows, | |
5402 | "*Non-nil means highlight region even in nonselected windows."); | |
293a54ce | 5403 | highlight_nonselected_windows = 0; |
d39b6696 KH |
5404 | |
5405 | DEFVAR_BOOL ("multiple-frames", &multiple_frames, | |
3450d04c KH |
5406 | "Non-nil if more than one frame is visible on this display.\n\ |
5407 | Minibuffer-only frames don't count, but iconified frames do.\n\ | |
4c2eb242 RS |
5408 | This variable is not guaranteed to be accurate except while processing\n\ |
5409 | `frame-title-format' and `icon-title-format'."); | |
d39b6696 KH |
5410 | |
5411 | DEFVAR_LISP ("frame-title-format", &Vframe_title_format, | |
5412 | "Template for displaying the titlebar of visible frames.\n\ | |
5413 | \(Assuming the window manager supports this feature.)\n\ | |
5414 | This variable has the same structure as `mode-line-format' (which see),\n\ | |
5415 | and is used only on frames for which no explicit name has been set\n\ | |
5416 | \(see `modify-frame-parameters')."); | |
5417 | DEFVAR_LISP ("icon-title-format", &Vicon_title_format, | |
5418 | "Template for displaying the titlebar of an iconified frame.\n\ | |
5419 | \(Assuming the window manager supports this feature.)\n\ | |
5420 | This variable has the same structure as `mode-line-format' (which see),\n\ | |
5421 | and is used only on frames for which no explicit name has been set\n\ | |
5422 | \(see `modify-frame-parameters')."); | |
5423 | Vicon_title_format | |
5424 | = Vframe_title_format | |
5425 | = Fcons (intern ("multiple-frames"), | |
5426 | Fcons (build_string ("%b"), | |
5427 | Fcons (Fcons (build_string (""), | |
5428 | Fcons (intern ("invocation-name"), | |
5429 | Fcons (build_string ("@"), | |
5430 | Fcons (intern ("system-name"), | |
5431 | Qnil)))), | |
5432 | Qnil))); | |
5992c4f7 KH |
5433 | |
5434 | DEFVAR_LISP ("message-log-max", &Vmessage_log_max, | |
5435 | "Maximum number of lines to keep in the message log buffer.\n\ | |
5436 | If nil, disable message logging. If t, log messages but don't truncate\n\ | |
5437 | the buffer when it becomes large."); | |
5438 | XSETFASTINT (Vmessage_log_max, 50); | |
08b610e4 RS |
5439 | |
5440 | DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions, | |
5441 | "Functions called before redisplay, if window sizes have changed.\n\ | |
5442 | The value should be a list of functions that take one argument.\n\ | |
5443 | Just before redisplay, for each frame, if any of its windows have changed\n\ | |
5444 | size since the last redisplay, or have been split or deleted,\n\ | |
5445 | all the functions in the list are called, with the frame as argument."); | |
5446 | Vwindow_size_change_functions = Qnil; | |
75c43375 RS |
5447 | |
5448 | DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions, | |
010494d0 | 5449 | "List of functions to call before redisplaying a window with scrolling.\n\ |
75c43375 | 5450 | Each function is called with two arguments, the window\n\ |
8d9583b0 RS |
5451 | and its new display-start position. Note that the value of `window-end'\n\ |
5452 | is not valid when these functions are called."); | |
75c43375 | 5453 | Vwindow_scroll_functions = Qnil; |
010494d0 KH |
5454 | |
5455 | DEFVAR_INT ("minibuffer-scroll-overlap", &minibuffer_scroll_overlap, | |
5456 | "*Number of characters of overlap when scrolling a one-line window.\n\ | |
5457 | This commonly affects the minibuffer window, hence the name of the variable."); | |
5458 | minibuffer_scroll_overlap = 20; | |
a2889657 JB |
5459 | } |
5460 | ||
5461 | /* initialize the window system */ | |
5462 | init_xdisp () | |
5463 | { | |
5464 | Lisp_Object root_window; | |
5465 | #ifndef COMPILER_REGISTER_BUG | |
5466 | register | |
5467 | #endif /* COMPILER_REGISTER_BUG */ | |
5468 | struct window *mini_w; | |
5469 | ||
5470 | this_line_bufpos = 0; | |
5471 | ||
5472 | mini_w = XWINDOW (minibuf_window); | |
11e82b76 | 5473 | root_window = FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w))); |
a2889657 JB |
5474 | |
5475 | echo_area_glyphs = 0; | |
5476 | previous_echo_glyphs = 0; | |
5477 | ||
5478 | if (!noninteractive) | |
5479 | { | |
44fa5b1e | 5480 | FRAME_PTR f = XFRAME (WINDOW_FRAME (XWINDOW (root_window))); |
12c226c5 RS |
5481 | XSETFASTINT (XWINDOW (root_window)->top, FRAME_MENU_BAR_LINES (f)); |
5482 | set_window_height (root_window, | |
5483 | FRAME_HEIGHT (f) - 1 - FRAME_MENU_BAR_LINES (f), | |
5484 | 0); | |
c2213350 | 5485 | XSETFASTINT (mini_w->top, FRAME_HEIGHT (f) - 1); |
a2889657 JB |
5486 | set_window_height (minibuf_window, 1, 0); |
5487 | ||
c2213350 KH |
5488 | XSETFASTINT (XWINDOW (root_window)->width, FRAME_WIDTH (f)); |
5489 | XSETFASTINT (mini_w->width, FRAME_WIDTH (f)); | |
a2889657 JB |
5490 | } |
5491 | } |