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1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
66c6abf0 | 2 | |
ab422c4d PE |
3 | Copyright (C) 1985-1989, 1993-1995, 1997-2013 Free Software Foundation, |
4 | Inc. | |
1ab256cb RM |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
9ec0b715 | 8 | GNU Emacs is free software: you can redistribute it and/or modify |
1ab256cb | 9 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
10 | the Free Software Foundation, either version 3 of the License, or |
11 | (at your option) any later version. | |
1ab256cb RM |
12 | |
13 | GNU Emacs is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
1ab256cb | 20 | |
68c45bf0 | 21 | #include <config.h> |
1ab256cb | 22 | |
2381d133 JB |
23 | #include <sys/types.h> |
24 | #include <sys/stat.h> | |
1ab256cb | 25 | #include <sys/param.h> |
9dde47f5 | 26 | #include <errno.h> |
15e7873a | 27 | #include <stdio.h> |
dfcf069d | 28 | #include <unistd.h> |
7ee72033 | 29 | |
d6202519 PE |
30 | #include <verify.h> |
31 | ||
1ab256cb | 32 | #include "lisp.h" |
21cf4cf8 | 33 | #include "intervals.h" |
1ab256cb RM |
34 | #include "window.h" |
35 | #include "commands.h" | |
8f348ed5 | 36 | #include "character.h" |
e5560ff7 | 37 | #include "buffer.h" |
28e969dd | 38 | #include "region-cache.h" |
1ab256cb | 39 | #include "indent.h" |
d014bf88 | 40 | #include "blockinput.h" |
2538fae4 | 41 | #include "keyboard.h" |
e35f6ff7 | 42 | #include "keymap.h" |
08460cd4 | 43 | #include "frame.h" |
1ab256cb | 44 | |
70fe8236 | 45 | struct buffer *current_buffer; /* The current buffer. */ |
1ab256cb RM |
46 | |
47 | /* First buffer in chain of all buffers (in reverse order of creation). | |
179dade4 | 48 | Threaded through ->header.next.buffer. */ |
1ab256cb RM |
49 | |
50 | struct buffer *all_buffers; | |
51 | ||
52 | /* This structure holds the default values of the buffer-local variables | |
53 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
54 | The default value occupies the same slot in this structure | |
55 | as an individual buffer's value occupies in that buffer. | |
56 | Setting the default value also goes through the alist of buffers | |
57 | and stores into each buffer that does not say it has a local value. */ | |
58 | ||
e32a5799 | 59 | struct buffer alignas (GCALIGNMENT) buffer_defaults; |
1ab256cb | 60 | |
1ab256cb RM |
61 | /* This structure marks which slots in a buffer have corresponding |
62 | default values in buffer_defaults. | |
63 | Each such slot has a nonzero value in this structure. | |
64 | The value has only one nonzero bit. | |
65 | ||
66 | When a buffer has its own local value for a slot, | |
7c02e886 GM |
67 | the entry for that slot (found in the same slot in this structure) |
68 | is turned on in the buffer's local_flags array. | |
1ab256cb RM |
69 | |
70 | If a slot in this structure is -1, then even though there may | |
71 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
72 | and the corresponding slot in buffer_defaults is not used. | |
73 | ||
1ab256cb | 74 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is |
70fe8236 | 75 | zero, that is a bug. */ |
1ab256cb RM |
76 | |
77 | struct buffer buffer_local_flags; | |
78 | ||
79 | /* This structure holds the names of symbols whose values may be | |
70fe8236 | 80 | buffer-local. It is indexed and accessed in the same way as the above. */ |
1ab256cb | 81 | |
e32a5799 | 82 | struct buffer alignas (GCALIGNMENT) buffer_local_symbols; |
6b61353c | 83 | |
ce5b453a SM |
84 | /* Return the symbol of the per-buffer variable at offset OFFSET in |
85 | the buffer structure. */ | |
86 | ||
87 | #define PER_BUFFER_SYMBOL(OFFSET) \ | |
88 | (*(Lisp_Object *)((OFFSET) + (char *) &buffer_local_symbols)) | |
89 | ||
21514da7 PE |
90 | /* Maximum length of an overlay vector. */ |
91 | #define OVERLAY_COUNT_MAX \ | |
92 | ((ptrdiff_t) min (MOST_POSITIVE_FIXNUM, \ | |
663e2b3f | 93 | min (PTRDIFF_MAX, SIZE_MAX) / word_size)) |
21514da7 | 94 | |
13de9290 RS |
95 | /* Flags indicating which built-in buffer-local variables |
96 | are permanent locals. */ | |
7313acd0 | 97 | static char buffer_permanent_local_flags[MAX_PER_BUFFER_VARS]; |
7c02e886 GM |
98 | |
99 | /* Number of per-buffer variables used. */ | |
100 | ||
7313acd0 | 101 | int last_per_buffer_idx; |
13de9290 | 102 | |
f57e2426 | 103 | static void call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, |
37ef52bb | 104 | bool after, Lisp_Object arg1, |
f57e2426 J |
105 | Lisp_Object arg2, Lisp_Object arg3); |
106 | static void swap_out_buffer_local_variables (struct buffer *b); | |
37ef52bb | 107 | static void reset_buffer_local_variables (struct buffer *, bool); |
1ab256cb | 108 | |
8f3a2c26 DA |
109 | /* Alist of all buffer names vs the buffers. This used to be |
110 | a Lisp-visible variable, but is no longer, to prevent lossage | |
111 | due to user rplac'ing this alist or its elements. */ | |
1ab256cb RM |
112 | Lisp_Object Vbuffer_alist; |
113 | ||
955cbe7b | 114 | static Lisp_Object Qkill_buffer_query_functions; |
dcdffbf6 | 115 | |
43ed3b8d | 116 | /* Hook run before changing a major mode. */ |
955cbe7b | 117 | static Lisp_Object Qchange_major_mode_hook; |
22378665 | 118 | |
dbc4e1c1 | 119 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
120 | Lisp_Object Qbefore_change_functions; |
121 | Lisp_Object Qafter_change_functions; | |
1ab256cb | 122 | |
955cbe7b PE |
123 | static Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; |
124 | static Lisp_Object Qpermanent_local_hook; | |
1ab256cb | 125 | |
955cbe7b | 126 | static Lisp_Object Qprotected_field; |
1ab256cb | 127 | |
70fe8236 | 128 | static Lisp_Object QSFundamental; /* A string "Fundamental". */ |
1ab256cb | 129 | |
955cbe7b | 130 | static Lisp_Object Qkill_buffer_hook; |
9397e56f | 131 | static Lisp_Object Qbuffer_list_update_hook; |
1ab256cb | 132 | |
955cbe7b | 133 | static Lisp_Object Qget_file_buffer; |
5fe0b67e | 134 | |
955cbe7b | 135 | static Lisp_Object Qoverlayp; |
52f8ec73 | 136 | |
955cbe7b | 137 | Lisp_Object Qpriority, Qbefore_string, Qafter_string; |
9397e56f | 138 | |
28545e04 | 139 | static Lisp_Object Qevaporate; |
5985d248 | 140 | |
294d215f RS |
141 | Lisp_Object Qmodification_hooks; |
142 | Lisp_Object Qinsert_in_front_hooks; | |
143 | Lisp_Object Qinsert_behind_hooks; | |
144 | ||
fd05c7e9 | 145 | static void alloc_buffer_text (struct buffer *, ptrdiff_t); |
f57e2426 J |
146 | static void free_buffer_text (struct buffer *b); |
147 | static struct Lisp_Overlay * copy_overlays (struct buffer *, struct Lisp_Overlay *); | |
d311d28c | 148 | static void modify_overlay (struct buffer *, ptrdiff_t, ptrdiff_t); |
37ef52bb | 149 | static Lisp_Object buffer_lisp_local_variables (struct buffer *, bool); |
b86af064 | 150 | |
84575e67 PE |
151 | static void |
152 | CHECK_OVERLAY (Lisp_Object x) | |
153 | { | |
154 | CHECK_TYPE (OVERLAYP (x), Qoverlayp, x); | |
155 | } | |
156 | ||
080db47f EZ |
157 | /* These setters are used only in this file, so they can be private. |
158 | The public setters are inline functions defined in buffer.h. */ | |
b0ab8123 | 159 | static void |
39eb03f1 PE |
160 | bset_abbrev_mode (struct buffer *b, Lisp_Object val) |
161 | { | |
162 | b->INTERNAL_FIELD (abbrev_mode) = val; | |
163 | } | |
b0ab8123 | 164 | static void |
39eb03f1 PE |
165 | bset_abbrev_table (struct buffer *b, Lisp_Object val) |
166 | { | |
167 | b->INTERNAL_FIELD (abbrev_table) = val; | |
168 | } | |
b0ab8123 | 169 | static void |
39eb03f1 PE |
170 | bset_auto_fill_function (struct buffer *b, Lisp_Object val) |
171 | { | |
172 | b->INTERNAL_FIELD (auto_fill_function) = val; | |
173 | } | |
b0ab8123 | 174 | static void |
39eb03f1 PE |
175 | bset_auto_save_file_format (struct buffer *b, Lisp_Object val) |
176 | { | |
177 | b->INTERNAL_FIELD (auto_save_file_format) = val; | |
178 | } | |
b0ab8123 | 179 | static void |
39eb03f1 PE |
180 | bset_auto_save_file_name (struct buffer *b, Lisp_Object val) |
181 | { | |
182 | b->INTERNAL_FIELD (auto_save_file_name) = val; | |
183 | } | |
b0ab8123 | 184 | static void |
39eb03f1 PE |
185 | bset_backed_up (struct buffer *b, Lisp_Object val) |
186 | { | |
187 | b->INTERNAL_FIELD (backed_up) = val; | |
188 | } | |
b0ab8123 | 189 | static void |
39eb03f1 PE |
190 | bset_begv_marker (struct buffer *b, Lisp_Object val) |
191 | { | |
192 | b->INTERNAL_FIELD (begv_marker) = val; | |
193 | } | |
b0ab8123 | 194 | static void |
39eb03f1 PE |
195 | bset_bidi_display_reordering (struct buffer *b, Lisp_Object val) |
196 | { | |
197 | b->INTERNAL_FIELD (bidi_display_reordering) = val; | |
198 | } | |
b0ab8123 | 199 | static void |
39eb03f1 PE |
200 | bset_buffer_file_coding_system (struct buffer *b, Lisp_Object val) |
201 | { | |
202 | b->INTERNAL_FIELD (buffer_file_coding_system) = val; | |
203 | } | |
b0ab8123 | 204 | static void |
39eb03f1 PE |
205 | bset_case_fold_search (struct buffer *b, Lisp_Object val) |
206 | { | |
207 | b->INTERNAL_FIELD (case_fold_search) = val; | |
208 | } | |
b0ab8123 | 209 | static void |
39eb03f1 PE |
210 | bset_ctl_arrow (struct buffer *b, Lisp_Object val) |
211 | { | |
212 | b->INTERNAL_FIELD (ctl_arrow) = val; | |
213 | } | |
b0ab8123 | 214 | static void |
39eb03f1 PE |
215 | bset_cursor_in_non_selected_windows (struct buffer *b, Lisp_Object val) |
216 | { | |
217 | b->INTERNAL_FIELD (cursor_in_non_selected_windows) = val; | |
218 | } | |
b0ab8123 | 219 | static void |
39eb03f1 PE |
220 | bset_cursor_type (struct buffer *b, Lisp_Object val) |
221 | { | |
222 | b->INTERNAL_FIELD (cursor_type) = val; | |
223 | } | |
b0ab8123 | 224 | static void |
39eb03f1 PE |
225 | bset_display_table (struct buffer *b, Lisp_Object val) |
226 | { | |
227 | b->INTERNAL_FIELD (display_table) = val; | |
228 | } | |
b0ab8123 | 229 | static void |
39eb03f1 PE |
230 | bset_extra_line_spacing (struct buffer *b, Lisp_Object val) |
231 | { | |
232 | b->INTERNAL_FIELD (extra_line_spacing) = val; | |
233 | } | |
b0ab8123 | 234 | static void |
39eb03f1 PE |
235 | bset_file_format (struct buffer *b, Lisp_Object val) |
236 | { | |
237 | b->INTERNAL_FIELD (file_format) = val; | |
238 | } | |
b0ab8123 | 239 | static void |
39eb03f1 PE |
240 | bset_file_truename (struct buffer *b, Lisp_Object val) |
241 | { | |
242 | b->INTERNAL_FIELD (file_truename) = val; | |
243 | } | |
b0ab8123 | 244 | static void |
39eb03f1 PE |
245 | bset_fringe_cursor_alist (struct buffer *b, Lisp_Object val) |
246 | { | |
247 | b->INTERNAL_FIELD (fringe_cursor_alist) = val; | |
248 | } | |
b0ab8123 | 249 | static void |
39eb03f1 PE |
250 | bset_fringe_indicator_alist (struct buffer *b, Lisp_Object val) |
251 | { | |
252 | b->INTERNAL_FIELD (fringe_indicator_alist) = val; | |
253 | } | |
b0ab8123 | 254 | static void |
39eb03f1 PE |
255 | bset_fringes_outside_margins (struct buffer *b, Lisp_Object val) |
256 | { | |
257 | b->INTERNAL_FIELD (fringes_outside_margins) = val; | |
258 | } | |
b0ab8123 | 259 | static void |
39eb03f1 PE |
260 | bset_header_line_format (struct buffer *b, Lisp_Object val) |
261 | { | |
262 | b->INTERNAL_FIELD (header_line_format) = val; | |
263 | } | |
b0ab8123 | 264 | static void |
39eb03f1 PE |
265 | bset_indicate_buffer_boundaries (struct buffer *b, Lisp_Object val) |
266 | { | |
267 | b->INTERNAL_FIELD (indicate_buffer_boundaries) = val; | |
268 | } | |
b0ab8123 | 269 | static void |
39eb03f1 PE |
270 | bset_indicate_empty_lines (struct buffer *b, Lisp_Object val) |
271 | { | |
272 | b->INTERNAL_FIELD (indicate_empty_lines) = val; | |
273 | } | |
b0ab8123 | 274 | static void |
39eb03f1 PE |
275 | bset_invisibility_spec (struct buffer *b, Lisp_Object val) |
276 | { | |
277 | b->INTERNAL_FIELD (invisibility_spec) = val; | |
278 | } | |
b0ab8123 | 279 | static void |
39eb03f1 PE |
280 | bset_left_fringe_width (struct buffer *b, Lisp_Object val) |
281 | { | |
282 | b->INTERNAL_FIELD (left_fringe_width) = val; | |
283 | } | |
b0ab8123 | 284 | static void |
39eb03f1 PE |
285 | bset_major_mode (struct buffer *b, Lisp_Object val) |
286 | { | |
287 | b->INTERNAL_FIELD (major_mode) = val; | |
288 | } | |
b0ab8123 | 289 | static void |
39eb03f1 PE |
290 | bset_mark (struct buffer *b, Lisp_Object val) |
291 | { | |
292 | b->INTERNAL_FIELD (mark) = val; | |
293 | } | |
b0ab8123 | 294 | static void |
39eb03f1 PE |
295 | bset_minor_modes (struct buffer *b, Lisp_Object val) |
296 | { | |
297 | b->INTERNAL_FIELD (minor_modes) = val; | |
298 | } | |
b0ab8123 | 299 | static void |
39eb03f1 PE |
300 | bset_mode_line_format (struct buffer *b, Lisp_Object val) |
301 | { | |
302 | b->INTERNAL_FIELD (mode_line_format) = val; | |
303 | } | |
b0ab8123 | 304 | static void |
39eb03f1 PE |
305 | bset_mode_name (struct buffer *b, Lisp_Object val) |
306 | { | |
307 | b->INTERNAL_FIELD (mode_name) = val; | |
308 | } | |
b0ab8123 | 309 | static void |
39eb03f1 PE |
310 | bset_name (struct buffer *b, Lisp_Object val) |
311 | { | |
312 | b->INTERNAL_FIELD (name) = val; | |
313 | } | |
b0ab8123 | 314 | static void |
39eb03f1 PE |
315 | bset_overwrite_mode (struct buffer *b, Lisp_Object val) |
316 | { | |
317 | b->INTERNAL_FIELD (overwrite_mode) = val; | |
318 | } | |
b0ab8123 | 319 | static void |
39eb03f1 PE |
320 | bset_pt_marker (struct buffer *b, Lisp_Object val) |
321 | { | |
322 | b->INTERNAL_FIELD (pt_marker) = val; | |
323 | } | |
b0ab8123 | 324 | static void |
39eb03f1 PE |
325 | bset_right_fringe_width (struct buffer *b, Lisp_Object val) |
326 | { | |
327 | b->INTERNAL_FIELD (right_fringe_width) = val; | |
328 | } | |
b0ab8123 | 329 | static void |
39eb03f1 PE |
330 | bset_save_length (struct buffer *b, Lisp_Object val) |
331 | { | |
332 | b->INTERNAL_FIELD (save_length) = val; | |
333 | } | |
b0ab8123 | 334 | static void |
39eb03f1 PE |
335 | bset_scroll_bar_width (struct buffer *b, Lisp_Object val) |
336 | { | |
337 | b->INTERNAL_FIELD (scroll_bar_width) = val; | |
338 | } | |
b0ab8123 | 339 | static void |
39eb03f1 PE |
340 | bset_scroll_down_aggressively (struct buffer *b, Lisp_Object val) |
341 | { | |
342 | b->INTERNAL_FIELD (scroll_down_aggressively) = val; | |
343 | } | |
b0ab8123 | 344 | static void |
39eb03f1 PE |
345 | bset_scroll_up_aggressively (struct buffer *b, Lisp_Object val) |
346 | { | |
347 | b->INTERNAL_FIELD (scroll_up_aggressively) = val; | |
348 | } | |
b0ab8123 | 349 | static void |
39eb03f1 PE |
350 | bset_selective_display (struct buffer *b, Lisp_Object val) |
351 | { | |
352 | b->INTERNAL_FIELD (selective_display) = val; | |
353 | } | |
b0ab8123 | 354 | static void |
39eb03f1 PE |
355 | bset_selective_display_ellipses (struct buffer *b, Lisp_Object val) |
356 | { | |
357 | b->INTERNAL_FIELD (selective_display_ellipses) = val; | |
358 | } | |
b0ab8123 | 359 | static void |
39eb03f1 PE |
360 | bset_vertical_scroll_bar_type (struct buffer *b, Lisp_Object val) |
361 | { | |
362 | b->INTERNAL_FIELD (vertical_scroll_bar_type) = val; | |
363 | } | |
b0ab8123 | 364 | static void |
39eb03f1 PE |
365 | bset_word_wrap (struct buffer *b, Lisp_Object val) |
366 | { | |
367 | b->INTERNAL_FIELD (word_wrap) = val; | |
368 | } | |
b0ab8123 | 369 | static void |
39eb03f1 PE |
370 | bset_zv_marker (struct buffer *b, Lisp_Object val) |
371 | { | |
372 | b->INTERNAL_FIELD (zv_marker) = val; | |
373 | } | |
374 | ||
01136e9b | 375 | void |
d3da34e0 | 376 | nsberror (Lisp_Object spec) |
1ab256cb | 377 | { |
a7a60ce9 | 378 | if (STRINGP (spec)) |
d5db4077 | 379 | error ("No buffer named %s", SDATA (spec)); |
1ab256cb RM |
380 | error ("Invalid buffer argument"); |
381 | } | |
382 | \f | |
a7ca3326 | 383 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
7ee72033 MB |
384 | doc: /* Return non-nil if OBJECT is a buffer which has not been killed. |
385 | Value is nil if OBJECT is not a buffer or if it has been killed. */) | |
5842a27b | 386 | (Lisp_Object object) |
0dc88e60 | 387 | { |
e578f381 | 388 | return ((BUFFERP (object) && BUFFER_LIVE_P (XBUFFER (object))) |
0dc88e60 RS |
389 | ? Qt : Qnil); |
390 | } | |
391 | ||
08460cd4 | 392 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
7ee72033 | 393 | doc: /* Return a list of all existing live buffers. |
9397e56f MR |
394 | If the optional arg FRAME is a frame, we return the buffer list in the |
395 | proper order for that frame: the buffers show in FRAME come first, | |
396 | followed by the rest of the buffers. */) | |
5842a27b | 397 | (Lisp_Object frame) |
1ab256cb | 398 | { |
a18b8cb5 | 399 | Lisp_Object general; |
08460cd4 RS |
400 | general = Fmapcar (Qcdr, Vbuffer_alist); |
401 | ||
402 | if (FRAMEP (frame)) | |
403 | { | |
a18b8cb5 KL |
404 | Lisp_Object framelist, prevlist, tail; |
405 | Lisp_Object args[3]; | |
08460cd4 | 406 | |
e69b0960 | 407 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); |
9397e56f | 408 | prevlist = Fnreverse (Fcopy_sequence |
e69b0960 | 409 | (XFRAME (frame)->buried_buffer_list)); |
08460cd4 | 410 | |
a18b8cb5 KL |
411 | /* Remove from GENERAL any buffer that duplicates one in |
412 | FRAMELIST or PREVLIST. */ | |
08460cd4 | 413 | tail = framelist; |
a18b8cb5 | 414 | while (CONSP (tail)) |
08460cd4 | 415 | { |
7539e11f KR |
416 | general = Fdelq (XCAR (tail), general); |
417 | tail = XCDR (tail); | |
08460cd4 | 418 | } |
a18b8cb5 KL |
419 | tail = prevlist; |
420 | while (CONSP (tail)) | |
421 | { | |
422 | general = Fdelq (XCAR (tail), general); | |
423 | tail = XCDR (tail); | |
424 | } | |
425 | ||
426 | args[0] = framelist; | |
427 | args[1] = general; | |
428 | args[2] = prevlist; | |
429 | return Fnconc (3, args); | |
08460cd4 | 430 | } |
9397e56f MR |
431 | else |
432 | return general; | |
1ab256cb RM |
433 | } |
434 | ||
04ae1b48 RS |
435 | /* Like Fassoc, but use Fstring_equal to compare |
436 | (which ignores text properties), | |
437 | and don't ever QUIT. */ | |
438 | ||
439 | static Lisp_Object | |
d3da34e0 | 440 | assoc_ignore_text_properties (register Lisp_Object key, Lisp_Object list) |
04ae1b48 RS |
441 | { |
442 | register Lisp_Object tail; | |
6d70a280 | 443 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
04ae1b48 RS |
444 | { |
445 | register Lisp_Object elt, tem; | |
6d70a280 | 446 | elt = XCAR (tail); |
04ae1b48 RS |
447 | tem = Fstring_equal (Fcar (elt), key); |
448 | if (!NILP (tem)) | |
449 | return elt; | |
450 | } | |
451 | return Qnil; | |
452 | } | |
453 | ||
a7ca3326 | 454 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
c8804c4f MR |
455 | doc: /* Return the buffer named BUFFER-OR-NAME. |
456 | BUFFER-OR-NAME must be either a string or a buffer. If BUFFER-OR-NAME | |
457 | is a string and there is no buffer with that name, return nil. If | |
458 | BUFFER-OR-NAME is a buffer, return it as given. */) | |
5842a27b | 459 | (register Lisp_Object buffer_or_name) |
1ab256cb | 460 | { |
c8804c4f MR |
461 | if (BUFFERP (buffer_or_name)) |
462 | return buffer_or_name; | |
463 | CHECK_STRING (buffer_or_name); | |
1ab256cb | 464 | |
c8804c4f | 465 | return Fcdr (assoc_ignore_text_properties (buffer_or_name, Vbuffer_alist)); |
1ab256cb RM |
466 | } |
467 | ||
468 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
7ee72033 | 469 | doc: /* Return the buffer visiting file FILENAME (a string). |
018ba359 PJ |
470 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME. |
471 | If there is no such live buffer, return nil. | |
7ee72033 | 472 | See also `find-buffer-visiting'. */) |
5842a27b | 473 | (register Lisp_Object filename) |
1ab256cb | 474 | { |
8f3a2c26 | 475 | register Lisp_Object tail, buf, handler; |
5fe0b67e | 476 | |
b7826503 | 477 | CHECK_STRING (filename); |
1ab256cb RM |
478 | filename = Fexpand_file_name (filename, Qnil); |
479 | ||
5fe0b67e RS |
480 | /* If the file name has special constructs in it, |
481 | call the corresponding file handler. */ | |
a617e913 | 482 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e | 483 | if (!NILP (handler)) |
a59225b1 CY |
484 | { |
485 | Lisp_Object handled_buf = call2 (handler, Qget_file_buffer, | |
486 | filename); | |
487 | return BUFFERP (handled_buf) ? handled_buf : Qnil; | |
488 | } | |
5fe0b67e | 489 | |
8f3a2c26 | 490 | FOR_EACH_LIVE_BUFFER (tail, buf) |
1ab256cb | 491 | { |
4b4deea2 | 492 | if (!STRINGP (BVAR (XBUFFER (buf), filename))) continue; |
8f3a2c26 | 493 | if (!NILP (Fstring_equal (BVAR (XBUFFER (buf), filename), filename))) |
1ab256cb RM |
494 | return buf; |
495 | } | |
496 | return Qnil; | |
497 | } | |
498 | ||
52e01189 | 499 | Lisp_Object |
d3da34e0 | 500 | get_truename_buffer (register Lisp_Object filename) |
52e01189 | 501 | { |
8f3a2c26 | 502 | register Lisp_Object tail, buf; |
52e01189 | 503 | |
8f3a2c26 | 504 | FOR_EACH_LIVE_BUFFER (tail, buf) |
52e01189 | 505 | { |
4b4deea2 | 506 | if (!STRINGP (BVAR (XBUFFER (buf), file_truename))) continue; |
8f3a2c26 | 507 | if (!NILP (Fstring_equal (BVAR (XBUFFER (buf), file_truename), filename))) |
52e01189 RS |
508 | return buf; |
509 | } | |
510 | return Qnil; | |
511 | } | |
512 | ||
a7ca3326 | 513 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, |
cd265ca6 MR |
514 | doc: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed. |
515 | If BUFFER-OR-NAME is a string and a live buffer with that name exists, | |
516 | return that buffer. If no such buffer exists, create a new buffer with | |
517 | that name and return it. If BUFFER-OR-NAME starts with a space, the new | |
518 | buffer does not keep undo information. | |
519 | ||
520 | If BUFFER-OR-NAME is a buffer instead of a string, return it as given, | |
521 | even if it is dead. The return value is never nil. */) | |
5842a27b | 522 | (register Lisp_Object buffer_or_name) |
1ab256cb | 523 | { |
cd265ca6 | 524 | register Lisp_Object buffer, name; |
1ab256cb RM |
525 | register struct buffer *b; |
526 | ||
cd265ca6 MR |
527 | buffer = Fget_buffer (buffer_or_name); |
528 | if (!NILP (buffer)) | |
529 | return buffer; | |
1ab256cb | 530 | |
cd265ca6 | 531 | if (SCHARS (buffer_or_name) == 0) |
31cd83e9 KH |
532 | error ("Empty string for buffer name is not allowed"); |
533 | ||
cc648cef | 534 | b = allocate_buffer (); |
1ab256cb | 535 | |
336cd056 RS |
536 | /* An ordinary buffer uses its own struct buffer_text. */ |
537 | b->text = &b->own_text; | |
9928463d DA |
538 | b->base_buffer = NULL; |
539 | /* No one shares the text with us now. */ | |
540 | b->indirections = 0; | |
98a07056 DA |
541 | /* No one shows us now. */ |
542 | b->window_count = 0; | |
336cd056 | 543 | |
1ab256cb | 544 | BUF_GAP_SIZE (b) = 20; |
4d7e6e51 | 545 | block_input (); |
3b06f880 KH |
546 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
547 | anchoring a search. */ | |
b86af064 | 548 | alloc_buffer_text (b, BUF_GAP_SIZE (b) + 1); |
4d7e6e51 | 549 | unblock_input (); |
1ab256cb | 550 | if (! BUF_BEG_ADDR (b)) |
531b0165 | 551 | buffer_memory_full (BUF_GAP_SIZE (b) + 1); |
1ab256cb | 552 | |
cffc6f3b CY |
553 | b->pt = BEG; |
554 | b->begv = BEG; | |
555 | b->zv = BEG; | |
556 | b->pt_byte = BEG_BYTE; | |
557 | b->begv_byte = BEG_BYTE; | |
558 | b->zv_byte = BEG_BYTE; | |
559 | ||
6d70a280 | 560 | BUF_GPT (b) = BEG; |
6d70a280 | 561 | BUF_GPT_BYTE (b) = BEG_BYTE; |
cffc6f3b CY |
562 | |
563 | BUF_Z (b) = BEG; | |
6d70a280 | 564 | BUF_Z_BYTE (b) = BEG_BYTE; |
1ab256cb | 565 | BUF_MODIFF (b) = 1; |
3e145152 | 566 | BUF_CHARS_MODIFF (b) = 1; |
2509d356 | 567 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 | 568 | BUF_SAVE_MODIFF (b) = 1; |
f9e7c67e | 569 | BUF_COMPACT (b) = 1; |
0c94c8d6 | 570 | set_buffer_intervals (b, NULL); |
b5a225b4 GM |
571 | BUF_UNCHANGED_MODIFIED (b) = 1; |
572 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
573 | BUF_END_UNCHANGED (b) = 0; | |
574 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 575 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
2941c447 | 576 | b->text->inhibit_shrinking = 0; |
1ab256cb | 577 | |
28e969dd JB |
578 | b->newline_cache = 0; |
579 | b->width_run_cache = 0; | |
e30b79c1 | 580 | b->bidi_paragraph_cache = 0; |
39eb03f1 | 581 | bset_width_table (b, Qnil); |
b5a225b4 | 582 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 583 | |
336cd056 RS |
584 | /* An ordinary buffer normally doesn't need markers |
585 | to handle BEGV and ZV. */ | |
39eb03f1 PE |
586 | bset_pt_marker (b, Qnil); |
587 | bset_begv_marker (b, Qnil); | |
588 | bset_zv_marker (b, Qnil); | |
04ae1b48 | 589 | |
cd265ca6 | 590 | name = Fcopy_sequence (buffer_or_name); |
0c94c8d6 | 591 | set_string_intervals (name, NULL); |
39eb03f1 | 592 | bset_name (b, name); |
04ae1b48 | 593 | |
39eb03f1 | 594 | bset_undo_list (b, SREF (name, 0) != ' ' ? Qnil : Qt); |
1ab256cb RM |
595 | |
596 | reset_buffer (b); | |
13de9290 | 597 | reset_buffer_local_variables (b, 1); |
1ab256cb | 598 | |
39eb03f1 | 599 | bset_mark (b, Fmake_marker ()); |
65745fad | 600 | BUF_MARKERS (b) = NULL; |
1f57cb74 | 601 | |
1ab256cb | 602 | /* Put this in the alist of all live buffers. */ |
cd265ca6 | 603 | XSETBUFFER (buffer, b); |
6c6f1994 | 604 | Vbuffer_alist = nconc2 (Vbuffer_alist, list1 (Fcons (name, buffer))); |
9397e56f MR |
605 | /* And run buffer-list-update-hook. */ |
606 | if (!NILP (Vrun_hooks)) | |
607 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1ab256cb | 608 | |
cd265ca6 | 609 | return buffer; |
336cd056 RS |
610 | } |
611 | ||
7e9d5818 | 612 | |
04e4cb3a GM |
613 | /* Return a list of overlays which is a copy of the overlay list |
614 | LIST, but for buffer B. */ | |
615 | ||
2410d73a | 616 | static struct Lisp_Overlay * |
d3da34e0 | 617 | copy_overlays (struct buffer *b, struct Lisp_Overlay *list) |
04e4cb3a | 618 | { |
2410d73a | 619 | struct Lisp_Overlay *result = NULL, *tail = NULL; |
04e4cb3a | 620 | |
2410d73a | 621 | for (; list; list = list->next) |
04e4cb3a | 622 | { |
fa691a83 DA |
623 | Lisp_Object overlay, start, end; |
624 | struct Lisp_Marker *m; | |
04e4cb3a | 625 | |
c644523b DA |
626 | eassert (MARKERP (list->start)); |
627 | m = XMARKER (list->start); | |
fa691a83 DA |
628 | start = build_marker (b, m->charpos, m->bytepos); |
629 | XMARKER (start)->insertion_type = m->insertion_type; | |
04e4cb3a | 630 | |
c644523b DA |
631 | eassert (MARKERP (list->end)); |
632 | m = XMARKER (list->end); | |
fa691a83 DA |
633 | end = build_marker (b, m->charpos, m->bytepos); |
634 | XMARKER (end)->insertion_type = m->insertion_type; | |
177c0ea7 | 635 | |
c644523b | 636 | overlay = build_overlay (start, end, Fcopy_sequence (list->plist)); |
2410d73a SM |
637 | if (tail) |
638 | tail = tail->next = XOVERLAY (overlay); | |
639 | else | |
640 | result = tail = XOVERLAY (overlay); | |
04e4cb3a GM |
641 | } |
642 | ||
2410d73a | 643 | return result; |
04e4cb3a | 644 | } |
177c0ea7 | 645 | |
0c94c8d6 PE |
646 | /* Set an appropriate overlay of B. */ |
647 | ||
b0ab8123 | 648 | static void |
0c94c8d6 PE |
649 | set_buffer_overlays_before (struct buffer *b, struct Lisp_Overlay *o) |
650 | { | |
651 | b->overlays_before = o; | |
652 | } | |
653 | ||
b0ab8123 | 654 | static void |
0c94c8d6 PE |
655 | set_buffer_overlays_after (struct buffer *b, struct Lisp_Overlay *o) |
656 | { | |
657 | b->overlays_after = o; | |
658 | } | |
04e4cb3a | 659 | |
7e9d5818 GM |
660 | /* Clone per-buffer values of buffer FROM. |
661 | ||
662 | Buffer TO gets the same per-buffer values as FROM, with the | |
663 | following exceptions: (1) TO's name is left untouched, (2) markers | |
664 | are copied and made to refer to TO, and (3) overlay lists are | |
665 | copied. */ | |
666 | ||
667 | static void | |
d3da34e0 | 668 | clone_per_buffer_values (struct buffer *from, struct buffer *to) |
7e9d5818 | 669 | { |
7e9d5818 GM |
670 | int offset; |
671 | ||
52b852c7 | 672 | FOR_EACH_PER_BUFFER_OBJECT_AT (offset) |
7e9d5818 GM |
673 | { |
674 | Lisp_Object obj; | |
675 | ||
4b7cdc0e SM |
676 | /* Don't touch the `name' which should be unique for every buffer. */ |
677 | if (offset == PER_BUFFER_VAR_OFFSET (name)) | |
678 | continue; | |
679 | ||
4ce60d2e | 680 | obj = per_buffer_value (from, offset); |
ce5b453a | 681 | if (MARKERP (obj) && XMARKER (obj)->buffer == from) |
7e9d5818 GM |
682 | { |
683 | struct Lisp_Marker *m = XMARKER (obj); | |
657924ff DA |
684 | |
685 | obj = build_marker (to, m->charpos, m->bytepos); | |
7e9d5818 | 686 | XMARKER (obj)->insertion_type = m->insertion_type; |
7e9d5818 GM |
687 | } |
688 | ||
4ce60d2e | 689 | set_per_buffer_value (to, offset, obj); |
7e9d5818 GM |
690 | } |
691 | ||
72af86bd | 692 | memcpy (to->local_flags, from->local_flags, sizeof to->local_flags); |
177c0ea7 | 693 | |
0c94c8d6 PE |
694 | set_buffer_overlays_before (to, copy_overlays (to, from->overlays_before)); |
695 | set_buffer_overlays_after (to, copy_overlays (to, from->overlays_after)); | |
02f28bbd | 696 | |
e1688f54 RS |
697 | /* Get (a copy of) the alist of Lisp-level local variables of FROM |
698 | and install that in TO. */ | |
39eb03f1 | 699 | bset_local_var_alist (to, buffer_lisp_local_variables (from, 1)); |
7e9d5818 GM |
700 | } |
701 | ||
cffc6f3b CY |
702 | |
703 | /* If buffer B has markers to record PT, BEGV and ZV when it is not | |
704 | current, update these markers. */ | |
705 | ||
706 | static void | |
707 | record_buffer_markers (struct buffer *b) | |
708 | { | |
709 | if (! NILP (BVAR (b, pt_marker))) | |
710 | { | |
711 | Lisp_Object buffer; | |
712 | ||
713 | eassert (!NILP (BVAR (b, begv_marker))); | |
714 | eassert (!NILP (BVAR (b, zv_marker))); | |
715 | ||
716 | XSETBUFFER (buffer, b); | |
717 | set_marker_both (BVAR (b, pt_marker), buffer, b->pt, b->pt_byte); | |
718 | set_marker_both (BVAR (b, begv_marker), buffer, b->begv, b->begv_byte); | |
719 | set_marker_both (BVAR (b, zv_marker), buffer, b->zv, b->zv_byte); | |
720 | } | |
721 | } | |
722 | ||
723 | ||
724 | /* If buffer B has markers to record PT, BEGV and ZV when it is not | |
725 | current, fetch these values into B->begv etc. */ | |
726 | ||
727 | static void | |
728 | fetch_buffer_markers (struct buffer *b) | |
729 | { | |
730 | if (! NILP (BVAR (b, pt_marker))) | |
731 | { | |
732 | Lisp_Object m; | |
733 | ||
734 | eassert (!NILP (BVAR (b, begv_marker))); | |
735 | eassert (!NILP (BVAR (b, zv_marker))); | |
736 | ||
737 | m = BVAR (b, pt_marker); | |
738 | SET_BUF_PT_BOTH (b, marker_position (m), marker_byte_position (m)); | |
739 | ||
740 | m = BVAR (b, begv_marker); | |
741 | SET_BUF_BEGV_BOTH (b, marker_position (m), marker_byte_position (m)); | |
742 | ||
743 | m = BVAR (b, zv_marker); | |
744 | SET_BUF_ZV_BOTH (b, marker_position (m), marker_byte_position (m)); | |
745 | } | |
746 | } | |
747 | ||
748 | ||
7e9d5818 GM |
749 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, |
750 | 2, 3, | |
193c3837 | 751 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 752 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
6b61353c | 753 | BASE-BUFFER should be a live buffer, or the name of an existing buffer. |
018ba359 PJ |
754 | NAME should be a string which is not the name of an existing buffer. |
755 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
756 | such as major and minor modes, in the indirect buffer. | |
7ee72033 | 757 | CLONE nil means the indirect buffer's state is reset to default values. */) |
5842a27b | 758 | (Lisp_Object base_buffer, Lisp_Object name, Lisp_Object clone) |
336cd056 | 759 | { |
6b61353c | 760 | Lisp_Object buf, tem; |
7e9d5818 | 761 | struct buffer *b; |
336cd056 | 762 | |
6b61353c | 763 | CHECK_STRING (name); |
336cd056 RS |
764 | buf = Fget_buffer (name); |
765 | if (!NILP (buf)) | |
d5db4077 | 766 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 | 767 | |
6b61353c | 768 | tem = base_buffer; |
336cd056 RS |
769 | base_buffer = Fget_buffer (base_buffer); |
770 | if (NILP (base_buffer)) | |
6b61353c | 771 | error ("No such buffer: `%s'", SDATA (tem)); |
e578f381 | 772 | if (!BUFFER_LIVE_P (XBUFFER (base_buffer))) |
6b61353c | 773 | error ("Base buffer has been killed"); |
336cd056 | 774 | |
d5db4077 | 775 | if (SCHARS (name) == 0) |
336cd056 RS |
776 | error ("Empty string for buffer name is not allowed"); |
777 | ||
cc648cef | 778 | b = allocate_buffer (); |
336cd056 | 779 | |
9928463d DA |
780 | /* No double indirection - if base buffer is indirect, |
781 | new buffer becomes an indirect to base's base. */ | |
67ee9f6e SM |
782 | b->base_buffer = (XBUFFER (base_buffer)->base_buffer |
783 | ? XBUFFER (base_buffer)->base_buffer | |
784 | : XBUFFER (base_buffer)); | |
336cd056 RS |
785 | |
786 | /* Use the base buffer's text object. */ | |
787 | b->text = b->base_buffer->text; | |
9928463d DA |
788 | /* We have no own text. */ |
789 | b->indirections = -1; | |
790 | /* Notify base buffer that we share the text now. */ | |
791 | b->base_buffer->indirections++; | |
98a07056 DA |
792 | /* Always -1 for an indirect buffer. */ |
793 | b->window_count = -1; | |
336cd056 | 794 | |
cffc6f3b CY |
795 | b->pt = b->base_buffer->pt; |
796 | b->begv = b->base_buffer->begv; | |
797 | b->zv = b->base_buffer->zv; | |
798 | b->pt_byte = b->base_buffer->pt_byte; | |
799 | b->begv_byte = b->base_buffer->begv_byte; | |
800 | b->zv_byte = b->base_buffer->zv_byte; | |
336cd056 RS |
801 | |
802 | b->newline_cache = 0; | |
803 | b->width_run_cache = 0; | |
e30b79c1 | 804 | b->bidi_paragraph_cache = 0; |
39eb03f1 | 805 | bset_width_table (b, Qnil); |
336cd056 | 806 | |
336cd056 | 807 | name = Fcopy_sequence (name); |
0c94c8d6 | 808 | set_string_intervals (name, NULL); |
39eb03f1 | 809 | bset_name (b, name); |
336cd056 RS |
810 | |
811 | reset_buffer (b); | |
13de9290 | 812 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
813 | |
814 | /* Put this in the alist of all live buffers. */ | |
815 | XSETBUFFER (buf, b); | |
6c6f1994 | 816 | Vbuffer_alist = nconc2 (Vbuffer_alist, list1 (Fcons (name, buf))); |
336cd056 | 817 | |
39eb03f1 | 818 | bset_mark (b, Fmake_marker ()); |
336cd056 | 819 | |
abc9d959 | 820 | /* The multibyte status belongs to the base buffer. */ |
39eb03f1 PE |
821 | bset_enable_multibyte_characters |
822 | (b, BVAR (b->base_buffer, enable_multibyte_characters)); | |
abc9d959 | 823 | |
336cd056 | 824 | /* Make sure the base buffer has markers for its narrowing. */ |
4b4deea2 | 825 | if (NILP (BVAR (b->base_buffer, pt_marker))) |
336cd056 | 826 | { |
2aa46d6c CY |
827 | eassert (NILP (BVAR (b->base_buffer, begv_marker))); |
828 | eassert (NILP (BVAR (b->base_buffer, zv_marker))); | |
cffc6f3b | 829 | |
39eb03f1 PE |
830 | bset_pt_marker (b->base_buffer, |
831 | build_marker (b->base_buffer, b->base_buffer->pt, | |
832 | b->base_buffer->pt_byte)); | |
657924ff | 833 | |
39eb03f1 PE |
834 | bset_begv_marker (b->base_buffer, |
835 | build_marker (b->base_buffer, b->base_buffer->begv, | |
836 | b->base_buffer->begv_byte)); | |
cffc6f3b | 837 | |
39eb03f1 PE |
838 | bset_zv_marker (b->base_buffer, |
839 | build_marker (b->base_buffer, b->base_buffer->zv, | |
840 | b->base_buffer->zv_byte)); | |
cffc6f3b | 841 | |
4b4deea2 | 842 | XMARKER (BVAR (b->base_buffer, zv_marker))->insertion_type = 1; |
336cd056 RS |
843 | } |
844 | ||
7e9d5818 GM |
845 | if (NILP (clone)) |
846 | { | |
847 | /* Give the indirect buffer markers for its narrowing. */ | |
39eb03f1 PE |
848 | bset_pt_marker (b, build_marker (b, b->pt, b->pt_byte)); |
849 | bset_begv_marker (b, build_marker (b, b->begv, b->begv_byte)); | |
850 | bset_zv_marker (b, build_marker (b, b->zv, b->zv_byte)); | |
4b4deea2 | 851 | XMARKER (BVAR (b, zv_marker))->insertion_type = 1; |
7e9d5818 GM |
852 | } |
853 | else | |
7fa57e45 RS |
854 | { |
855 | struct buffer *old_b = current_buffer; | |
856 | ||
857 | clone_per_buffer_values (b->base_buffer, b); | |
39eb03f1 PE |
858 | bset_filename (b, Qnil); |
859 | bset_file_truename (b, Qnil); | |
860 | bset_display_count (b, make_number (0)); | |
861 | bset_backed_up (b, Qnil); | |
862 | bset_auto_save_file_name (b, Qnil); | |
7fa57e45 RS |
863 | set_buffer_internal_1 (b); |
864 | Fset (intern ("buffer-save-without-query"), Qnil); | |
865 | Fset (intern ("buffer-file-number"), Qnil); | |
866 | Fset (intern ("buffer-stale-function"), Qnil); | |
867 | set_buffer_internal_1 (old_b); | |
868 | } | |
336cd056 | 869 | |
9397e56f MR |
870 | /* Run buffer-list-update-hook. */ |
871 | if (!NILP (Vrun_hooks)) | |
872 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
873 | ||
a9ee7a59 | 874 | return buf; |
1ab256cb RM |
875 | } |
876 | ||
041a49a6 DA |
877 | /* Mark OV as no longer associated with B. */ |
878 | ||
879 | static void | |
880 | drop_overlay (struct buffer *b, struct Lisp_Overlay *ov) | |
881 | { | |
c644523b DA |
882 | eassert (b == XBUFFER (Fmarker_buffer (ov->start))); |
883 | modify_overlay (b, marker_position (ov->start), | |
884 | marker_position (ov->end)); | |
bc923770 DA |
885 | unchain_marker (XMARKER (ov->start)); |
886 | unchain_marker (XMARKER (ov->end)); | |
041a49a6 DA |
887 | |
888 | } | |
889 | ||
890 | /* Delete all overlays of B and reset it's overlay lists. */ | |
891 | ||
d4f5719a | 892 | void |
d3da34e0 | 893 | delete_all_overlays (struct buffer *b) |
d4f5719a | 894 | { |
041a49a6 | 895 | struct Lisp_Overlay *ov, *next; |
d4f5719a | 896 | |
389a94a5 SM |
897 | /* FIXME: Since each drop_overlay will scan BUF_MARKERS to unlink its |
898 | markers, we have an unneeded O(N^2) behavior here. */ | |
fd318b54 | 899 | for (ov = b->overlays_before; ov; ov = next) |
d4f5719a | 900 | { |
041a49a6 DA |
901 | drop_overlay (b, ov); |
902 | next = ov->next; | |
903 | ov->next = NULL; | |
d4f5719a | 904 | } |
041a49a6 | 905 | |
fd318b54 | 906 | for (ov = b->overlays_after; ov; ov = next) |
d4f5719a | 907 | { |
041a49a6 DA |
908 | drop_overlay (b, ov); |
909 | next = ov->next; | |
910 | ov->next = NULL; | |
d4f5719a | 911 | } |
041a49a6 | 912 | |
0c94c8d6 PE |
913 | set_buffer_overlays_before (b, NULL); |
914 | set_buffer_overlays_after (b, NULL); | |
d4f5719a SM |
915 | } |
916 | ||
bcd40520 | 917 | /* Reinitialize everything about a buffer except its name and contents |
6b61353c | 918 | and local variables. |
d4f5719a SM |
919 | If called on an already-initialized buffer, the list of overlays |
920 | should be deleted before calling this function, otherwise we end up | |
921 | with overlays that claim to belong to the buffer but the buffer | |
922 | claims it doesn't belong to it. */ | |
1ab256cb RM |
923 | |
924 | void | |
d3da34e0 | 925 | reset_buffer (register struct buffer *b) |
1ab256cb | 926 | { |
39eb03f1 PE |
927 | bset_filename (b, Qnil); |
928 | bset_file_truename (b, Qnil); | |
929 | bset_directory (b, current_buffer ? BVAR (current_buffer, directory) : Qnil); | |
43aac990 | 930 | b->modtime = make_timespec (0, UNKNOWN_MODTIME_NSECS); |
58b963f7 | 931 | b->modtime_size = -1; |
4b4deea2 | 932 | XSETFASTINT (BVAR (b, save_length), 0); |
1ab256cb | 933 | b->last_window_start = 1; |
8b264726 | 934 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
935 | b->clip_changed = 0; |
936 | b->prevent_redisplay_optimizations_p = 1; | |
39eb03f1 | 937 | bset_backed_up (b, Qnil); |
0b5397c2 | 938 | BUF_AUTOSAVE_MODIFF (b) = 0; |
d311d28c | 939 | b->auto_save_failure_time = 0; |
39eb03f1 PE |
940 | bset_auto_save_file_name (b, Qnil); |
941 | bset_read_only (b, Qnil); | |
0c94c8d6 PE |
942 | set_buffer_overlays_before (b, NULL); |
943 | set_buffer_overlays_after (b, NULL); | |
c2d5b10f | 944 | b->overlay_center = BEG; |
39eb03f1 PE |
945 | bset_mark_active (b, Qnil); |
946 | bset_point_before_scroll (b, Qnil); | |
947 | bset_file_format (b, Qnil); | |
948 | bset_auto_save_file_format (b, Qt); | |
949 | bset_last_selected_window (b, Qnil); | |
950 | bset_display_count (b, make_number (0)); | |
951 | bset_display_time (b, Qnil); | |
952 | bset_enable_multibyte_characters | |
953 | (b, BVAR (&buffer_defaults, enable_multibyte_characters)); | |
954 | bset_cursor_type (b, BVAR (&buffer_defaults, cursor_type)); | |
955 | bset_extra_line_spacing (b, BVAR (&buffer_defaults, extra_line_spacing)); | |
0522997d RS |
956 | |
957 | b->display_error_modiff = 0; | |
1ab256cb RM |
958 | } |
959 | ||
bcd40520 RS |
960 | /* Reset buffer B's local variables info. |
961 | Don't use this on a buffer that has already been in use; | |
962 | it does not treat permanent locals consistently. | |
13de9290 RS |
963 | Instead, use Fkill_all_local_variables. |
964 | ||
37ef52bb PE |
965 | If PERMANENT_TOO, reset permanent buffer-local variables. |
966 | If not, preserve those. */ | |
bcd40520 | 967 | |
13de9290 | 968 | static void |
37ef52bb | 969 | reset_buffer_local_variables (struct buffer *b, bool permanent_too) |
1ab256cb | 970 | { |
37ef52bb | 971 | int offset, i; |
1ab256cb RM |
972 | |
973 | /* Reset the major mode to Fundamental, together with all the | |
974 | things that depend on the major mode. | |
975 | default-major-mode is handled at a higher level. | |
976 | We ignore it here. */ | |
39eb03f1 PE |
977 | bset_major_mode (b, Qfundamental_mode); |
978 | bset_keymap (b, Qnil); | |
979 | bset_mode_name (b, QSFundamental); | |
980 | bset_minor_modes (b, Qnil); | |
3446af9c RS |
981 | |
982 | /* If the standard case table has been altered and invalidated, | |
983 | fix up its insides first. */ | |
984 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
985 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
986 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
987 | Fset_standard_case_table (Vascii_downcase_table); | |
988 | ||
39eb03f1 PE |
989 | bset_downcase_table (b, Vascii_downcase_table); |
990 | bset_upcase_table (b, XCHAR_TABLE (Vascii_downcase_table)->extras[0]); | |
991 | bset_case_canon_table (b, XCHAR_TABLE (Vascii_downcase_table)->extras[1]); | |
992 | bset_case_eqv_table (b, XCHAR_TABLE (Vascii_downcase_table)->extras[2]); | |
993 | bset_invisibility_spec (b, Qt); | |
3cb719bd | 994 | |
13de9290 | 995 | /* Reset all (or most) per-buffer variables to their defaults. */ |
3709505e | 996 | if (permanent_too) |
39eb03f1 | 997 | bset_local_var_alist (b, Qnil); |
3709505e SM |
998 | else |
999 | { | |
2f7a359d | 1000 | Lisp_Object tmp, prop, last = Qnil; |
4b4deea2 | 1001 | for (tmp = BVAR (b, local_var_alist); CONSP (tmp); tmp = XCDR (tmp)) |
ce5b453a | 1002 | if (!NILP (prop = Fget (XCAR (XCAR (tmp)), Qpermanent_local))) |
2f7a359d RS |
1003 | { |
1004 | /* If permanent-local, keep it. */ | |
1005 | last = tmp; | |
1006 | if (EQ (prop, Qpermanent_local_hook)) | |
1007 | { | |
1008 | /* This is a partially permanent hook variable. | |
1009 | Preserve only the elements that want to be preserved. */ | |
1010 | Lisp_Object list, newlist; | |
1011 | list = XCDR (XCAR (tmp)); | |
1012 | if (!CONSP (list)) | |
1013 | newlist = list; | |
1014 | else | |
1015 | for (newlist = Qnil; CONSP (list); list = XCDR (list)) | |
1016 | { | |
1017 | Lisp_Object elt = XCAR (list); | |
1018 | /* Preserve element ELT if it's t, | |
1019 | if it is a function with a `permanent-local-hook' property, | |
1020 | or if it's not a symbol. */ | |
1021 | if (! SYMBOLP (elt) | |
1022 | || EQ (elt, Qt) | |
1023 | || !NILP (Fget (elt, Qpermanent_local_hook))) | |
1024 | newlist = Fcons (elt, newlist); | |
1025 | } | |
1026 | XSETCDR (XCAR (tmp), Fnreverse (newlist)); | |
1027 | } | |
1028 | } | |
1029 | /* Delete this local variable. */ | |
3709505e | 1030 | else if (NILP (last)) |
39eb03f1 | 1031 | bset_local_var_alist (b, XCDR (tmp)); |
3709505e SM |
1032 | else |
1033 | XSETCDR (last, XCDR (tmp)); | |
1034 | } | |
1035 | ||
7313acd0 | 1036 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 1037 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 1038 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb | 1039 | |
36429c89 | 1040 | /* For each slot that has a default value, copy that into the slot. */ |
52b852c7 | 1041 | FOR_EACH_PER_BUFFER_OBJECT_AT (offset) |
aab80822 | 1042 | { |
7313acd0 | 1043 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
1044 | if ((idx > 0 |
1045 | && (permanent_too | |
ce5b453a | 1046 | || buffer_permanent_local_flags[idx] == 0))) |
4ce60d2e | 1047 | set_per_buffer_value (b, offset, per_buffer_default (offset)); |
aab80822 | 1048 | } |
1ab256cb RM |
1049 | } |
1050 | ||
01050cb5 RM |
1051 | /* We split this away from generate-new-buffer, because rename-buffer |
1052 | and set-visited-file-name ought to be able to use this to really | |
1053 | rename the buffer properly. */ | |
1054 | ||
a7ca3326 | 1055 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, |
16a97296 | 1056 | Sgenerate_new_buffer_name, 1, 2, 0, |
7ee72033 | 1057 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
1058 | If there is no live buffer named NAME, then return NAME. |
1059 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
6b61353c | 1060 | \(starting at 2) until an unused name is found, and then return that name. |
2f064abf | 1061 | Optional second argument IGNORE specifies a name that is okay to use (if |
8e4fd1e1 GM |
1062 | it is in the sequence to be tried) even if a buffer with that name exists. |
1063 | ||
1064 | If NAME begins with a space (i.e., a buffer that is not normally | |
1065 | visible to users), then if buffer NAME already exists a random number | |
1066 | is first appended to NAME, to speed up finding a non-existent buffer. */) | |
5842a27b | 1067 | (register Lisp_Object name, Lisp_Object ignore) |
1ab256cb | 1068 | { |
8e4fd1e1 | 1069 | register Lisp_Object gentemp, tem, tem2; |
d311d28c PE |
1070 | ptrdiff_t count; |
1071 | char number[INT_BUFSIZE_BOUND (ptrdiff_t) + sizeof "<>"]; | |
1ab256cb | 1072 | |
b7826503 | 1073 | CHECK_STRING (name); |
1ab256cb | 1074 | |
6b61353c KH |
1075 | tem = Fstring_equal (name, ignore); |
1076 | if (!NILP (tem)) | |
1077 | return name; | |
1ab256cb | 1078 | tem = Fget_buffer (name); |
265a9e55 | 1079 | if (NILP (tem)) |
01050cb5 | 1080 | return name; |
1ab256cb | 1081 | |
8e4fd1e1 GM |
1082 | if (!strncmp (SSDATA (name), " ", 1)) /* see bug#1229 */ |
1083 | { | |
1084 | /* Note fileio.c:make_temp_name does random differently. */ | |
a8290ec3 | 1085 | tem2 = concat2 (name, make_formatted_string |
52b852c7 | 1086 | (number, "-%"pI"d", |
a8290ec3 | 1087 | XFASTINT (Frandom (make_number (999999))))); |
8e4fd1e1 GM |
1088 | tem = Fget_buffer (tem2); |
1089 | if (NILP (tem)) | |
1090 | return tem2; | |
1091 | } | |
1092 | else | |
1093 | tem2 = name; | |
1094 | ||
1ab256cb RM |
1095 | count = 1; |
1096 | while (1) | |
1097 | { | |
a8290ec3 DA |
1098 | gentemp = concat2 (tem2, make_formatted_string |
1099 | (number, "<%"pD"d>", ++count)); | |
638e4fc3 | 1100 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
1101 | if (!NILP (tem)) |
1102 | return gentemp; | |
1ab256cb | 1103 | tem = Fget_buffer (gentemp); |
265a9e55 | 1104 | if (NILP (tem)) |
01050cb5 | 1105 | return gentemp; |
1ab256cb RM |
1106 | } |
1107 | } | |
1108 | ||
1109 | \f | |
a7ca3326 | 1110 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, |
7ee72033 | 1111 | doc: /* Return the name of BUFFER, as a string. |
35f5c1d2 JB |
1112 | BUFFER defaults to the current buffer. |
1113 | Return nil if BUFFER has been killed. */) | |
5842a27b | 1114 | (register Lisp_Object buffer) |
1ab256cb | 1115 | { |
265a9e55 | 1116 | if (NILP (buffer)) |
4b4deea2 | 1117 | return BVAR (current_buffer, name); |
b7826503 | 1118 | CHECK_BUFFER (buffer); |
4b4deea2 | 1119 | return BVAR (XBUFFER (buffer), name); |
1ab256cb RM |
1120 | } |
1121 | ||
a7ca3326 | 1122 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, |
7ee72033 MB |
1123 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
1124 | No argument or nil as argument means use the current buffer. */) | |
5842a27b | 1125 | (register Lisp_Object buffer) |
1ab256cb | 1126 | { |
265a9e55 | 1127 | if (NILP (buffer)) |
4b4deea2 | 1128 | return BVAR (current_buffer, filename); |
b7826503 | 1129 | CHECK_BUFFER (buffer); |
4b4deea2 | 1130 | return BVAR (XBUFFER (buffer), filename); |
1ab256cb RM |
1131 | } |
1132 | ||
336cd056 RS |
1133 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
1134 | 0, 1, 0, | |
7ee72033 | 1135 | doc: /* Return the base buffer of indirect buffer BUFFER. |
5a72efd4 LT |
1136 | If BUFFER is not indirect, return nil. |
1137 | BUFFER defaults to the current buffer. */) | |
5842a27b | 1138 | (register Lisp_Object buffer) |
336cd056 RS |
1139 | { |
1140 | struct buffer *base; | |
1141 | Lisp_Object base_buffer; | |
1142 | ||
1143 | if (NILP (buffer)) | |
1144 | base = current_buffer->base_buffer; | |
1145 | else | |
1146 | { | |
b7826503 | 1147 | CHECK_BUFFER (buffer); |
336cd056 RS |
1148 | base = XBUFFER (buffer)->base_buffer; |
1149 | } | |
1150 | ||
1151 | if (! base) | |
1152 | return Qnil; | |
1153 | XSETBUFFER (base_buffer, base); | |
1154 | return base_buffer; | |
1155 | } | |
1156 | ||
a7ca3326 | 1157 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
177c0ea7 | 1158 | Sbuffer_local_value, 2, 2, 0, |
79aa712d RS |
1159 | doc: /* Return the value of VARIABLE in BUFFER. |
1160 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
5e2ad10b | 1161 | is the default binding of the variable. */) |
5842a27b | 1162 | (register Lisp_Object variable, register Lisp_Object buffer) |
5f2c76c6 CY |
1163 | { |
1164 | register Lisp_Object result = buffer_local_value_1 (variable, buffer); | |
1165 | ||
1166 | if (EQ (result, Qunbound)) | |
1167 | xsignal1 (Qvoid_variable, variable); | |
1168 | ||
1169 | return result; | |
1170 | } | |
1171 | ||
1172 | ||
1173 | /* Like Fbuffer_local_value, but return Qunbound if the variable is | |
1174 | locally unbound. */ | |
1175 | ||
1176 | Lisp_Object | |
1177 | buffer_local_value_1 (Lisp_Object variable, Lisp_Object buffer) | |
79aa712d RS |
1178 | { |
1179 | register struct buffer *buf; | |
1180 | register Lisp_Object result; | |
ad97b375 | 1181 | struct Lisp_Symbol *sym; |
79aa712d | 1182 | |
5e2ad10b | 1183 | CHECK_SYMBOL (variable); |
ae69175b | 1184 | CHECK_BUFFER (buffer); |
79aa712d | 1185 | buf = XBUFFER (buffer); |
ce5b453a | 1186 | sym = XSYMBOL (variable); |
79aa712d | 1187 | |
ce5b453a SM |
1188 | start: |
1189 | switch (sym->redirect) | |
f0bac7de | 1190 | { |
ce5b453a SM |
1191 | case SYMBOL_VARALIAS: sym = indirect_variable (sym); goto start; |
1192 | case SYMBOL_PLAINVAL: result = SYMBOL_VAL (sym); break; | |
1193 | case SYMBOL_LOCALIZED: | |
1194 | { /* Look in local_var_alist. */ | |
1195 | struct Lisp_Buffer_Local_Value *blv = SYMBOL_BLV (sym); | |
1196 | XSETSYMBOL (variable, sym); /* Update In case of aliasing. */ | |
4b4deea2 | 1197 | result = Fassoc (variable, BVAR (buf, local_var_alist)); |
ce5b453a SM |
1198 | if (!NILP (result)) |
1199 | { | |
1200 | if (blv->fwd) | |
1201 | { /* What binding is loaded right now? */ | |
1202 | Lisp_Object current_alist_element = blv->valcell; | |
f0bac7de | 1203 | |
ce5b453a SM |
1204 | /* The value of the currently loaded binding is not |
1205 | stored in it, but rather in the realvalue slot. | |
1206 | Store that value into the binding it belongs to | |
1207 | in case that is the one we are about to use. */ | |
f0bac7de | 1208 | |
ce5b453a SM |
1209 | XSETCDR (current_alist_element, |
1210 | do_symval_forwarding (blv->fwd)); | |
1211 | } | |
1212 | /* Now get the (perhaps updated) value out of the binding. */ | |
1213 | result = XCDR (result); | |
1214 | } | |
1215 | else | |
1216 | result = Fdefault_value (variable); | |
1217 | break; | |
1218 | } | |
1219 | case SYMBOL_FORWARDED: | |
1220 | { | |
1221 | union Lisp_Fwd *fwd = SYMBOL_FWD (sym); | |
1222 | if (BUFFER_OBJFWDP (fwd)) | |
4ce60d2e | 1223 | result = per_buffer_value (buf, XBUFFER_OBJFWD (fwd)->offset); |
ce5b453a SM |
1224 | else |
1225 | result = Fdefault_value (variable); | |
1226 | break; | |
1227 | } | |
1088b922 | 1228 | default: emacs_abort (); |
f0bac7de | 1229 | } |
79aa712d | 1230 | |
5f2c76c6 | 1231 | return result; |
79aa712d RS |
1232 | } |
1233 | ||
e1688f54 | 1234 | /* Return an alist of the Lisp-level buffer-local bindings of |
7fa57e45 | 1235 | buffer BUF. That is, don't include the variables maintained |
8a05d57a | 1236 | in special slots in the buffer object. |
37ef52bb | 1237 | If not CLONE, replace elements of the form (VAR . unbound) |
8a05d57a | 1238 | by VAR. */ |
e1688f54 RS |
1239 | |
1240 | static Lisp_Object | |
37ef52bb | 1241 | buffer_lisp_local_variables (struct buffer *buf, bool clone) |
e1688f54 RS |
1242 | { |
1243 | Lisp_Object result = Qnil; | |
37ef52bb | 1244 | Lisp_Object tail; |
4b4deea2 | 1245 | for (tail = BVAR (buf, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
e1688f54 RS |
1246 | { |
1247 | Lisp_Object val, elt; | |
1248 | ||
1249 | elt = XCAR (tail); | |
1250 | ||
1251 | /* Reference each variable in the alist in buf. | |
1252 | If inquiring about the current buffer, this gets the current values, | |
1253 | so store them into the alist so the alist is up to date. | |
1254 | If inquiring about some other buffer, this swaps out any values | |
1255 | for that buffer, making the alist up to date automatically. */ | |
1256 | val = find_symbol_value (XCAR (elt)); | |
1257 | /* Use the current buffer value only if buf is the current buffer. */ | |
1258 | if (buf != current_buffer) | |
1259 | val = XCDR (elt); | |
1260 | ||
8a05d57a | 1261 | result = Fcons (!clone && EQ (val, Qunbound) |
0992bd9c CY |
1262 | ? XCAR (elt) |
1263 | : Fcons (XCAR (elt), val), | |
1264 | result); | |
e1688f54 RS |
1265 | } |
1266 | ||
1267 | return result; | |
1268 | } | |
1269 | ||
1ab256cb | 1270 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 1271 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 1272 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
1273 | Most elements look like (SYMBOL . VALUE), describing one variable. |
1274 | For a symbol that is locally unbound, just the symbol appears in the value. | |
1275 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 | 1276 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1277 | (register Lisp_Object buffer) |
1ab256cb RM |
1278 | { |
1279 | register struct buffer *buf; | |
553defa4 | 1280 | register Lisp_Object result; |
1ab256cb | 1281 | |
265a9e55 | 1282 | if (NILP (buffer)) |
1ab256cb RM |
1283 | buf = current_buffer; |
1284 | else | |
1285 | { | |
b7826503 | 1286 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1287 | buf = XBUFFER (buffer); |
1288 | } | |
1289 | ||
8a05d57a | 1290 | result = buffer_lisp_local_variables (buf, 0); |
1ab256cb | 1291 | |
1ab256cb RM |
1292 | /* Add on all the variables stored in special slots. */ |
1293 | { | |
7c02e886 | 1294 | int offset, idx; |
1ab256cb | 1295 | |
52b852c7 | 1296 | FOR_EACH_PER_BUFFER_OBJECT_AT (offset) |
1ab256cb | 1297 | { |
7313acd0 GM |
1298 | idx = PER_BUFFER_IDX (offset); |
1299 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
1300 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
0992bd9c CY |
1301 | { |
1302 | Lisp_Object sym = PER_BUFFER_SYMBOL (offset); | |
4ce60d2e | 1303 | Lisp_Object val = per_buffer_value (buf, offset); |
0992bd9c CY |
1304 | result = Fcons (EQ (val, Qunbound) ? sym : Fcons (sym, val), |
1305 | result); | |
1306 | } | |
1ab256cb RM |
1307 | } |
1308 | } | |
553defa4 RS |
1309 | |
1310 | return result; | |
1ab256cb | 1311 | } |
1ab256cb | 1312 | \f |
a7ca3326 | 1313 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, |
efc7e75f | 1314 | 0, 1, 0, |
7ee72033 MB |
1315 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
1316 | No argument or nil as argument means use current buffer as BUFFER. */) | |
5842a27b | 1317 | (register Lisp_Object buffer) |
1ab256cb RM |
1318 | { |
1319 | register struct buffer *buf; | |
265a9e55 | 1320 | if (NILP (buffer)) |
1ab256cb RM |
1321 | buf = current_buffer; |
1322 | else | |
1323 | { | |
b7826503 | 1324 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1325 | buf = XBUFFER (buffer); |
1326 | } | |
1327 | ||
336cd056 | 1328 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
1329 | } |
1330 | ||
ecda65d4 SM |
1331 | DEFUN ("force-mode-line-update", Fforce_mode_line_update, |
1332 | Sforce_mode_line_update, 0, 1, 0, | |
1333 | doc: /* Force redisplay of the current buffer's mode line and header line. | |
1334 | With optional non-nil ALL, force redisplay of all mode lines and | |
1335 | header lines. This function also forces recomputation of the | |
1336 | menu bar menus and the frame title. */) | |
1337 | (Lisp_Object all) | |
1338 | { | |
655ab9a3 | 1339 | if (!NILP (all)) |
ecda65d4 SM |
1340 | { |
1341 | update_mode_lines = 10; | |
655ab9a3 SM |
1342 | /* FIXME: This can't be right. */ |
1343 | current_buffer->prevent_redisplay_optimizations_p = true; | |
1344 | } | |
1345 | else if (buffer_window_count (current_buffer)) | |
1346 | { | |
1347 | bset_update_mode_line (current_buffer); | |
1348 | current_buffer->prevent_redisplay_optimizations_p = true; | |
ecda65d4 | 1349 | } |
bd7cd30a | 1350 | return all; |
ecda65d4 SM |
1351 | } |
1352 | ||
a7ca3326 | 1353 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, |
efc7e75f | 1354 | 1, 1, 0, |
7ee72033 MB |
1355 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
1356 | A non-nil FLAG means mark the buffer modified. */) | |
37ef52bb | 1357 | (Lisp_Object flag) |
1ab256cb | 1358 | { |
ecda65d4 SM |
1359 | Frestore_buffer_modified_p (flag); |
1360 | ||
1361 | /* Set update_mode_lines only if buffer is displayed in some window. | |
1362 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1363 | state by recording/restoring the state around blocks of code. | |
1364 | Setting update_mode_lines makes redisplay consider all windows | |
1365 | (on all frames). Stealth fontification of buffers not displayed | |
1366 | would incur additional redisplay costs if we'd set | |
1367 | update_modes_lines unconditionally. | |
1368 | ||
1369 | Ideally, I think there should be another mechanism for fontifying | |
1370 | buffers without "modifying" buffers, or redisplay should be | |
1371 | smarter about updating the `*' in mode lines. --gerd */ | |
bd7cd30a | 1372 | return Fforce_mode_line_update (Qnil); |
ecda65d4 SM |
1373 | } |
1374 | ||
1375 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, | |
1376 | Srestore_buffer_modified_p, 1, 1, 0, | |
1377 | doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay. | |
1378 | It is not ensured that mode lines will be updated to show the modified | |
1379 | state of the current buffer. Use with care. */) | |
1380 | (Lisp_Object flag) | |
1381 | { | |
1ab256cb | 1382 | #ifdef CLASH_DETECTION |
ecda65d4 SM |
1383 | Lisp_Object fn; |
1384 | ||
1ab256cb RM |
1385 | /* If buffer becoming modified, lock the file. |
1386 | If buffer becoming unmodified, unlock the file. */ | |
1387 | ||
82f8cd94 CY |
1388 | struct buffer *b = current_buffer->base_buffer |
1389 | ? current_buffer->base_buffer | |
1390 | : current_buffer; | |
1391 | ||
1392 | fn = BVAR (b, file_truename); | |
90d456d2 | 1393 | /* Test buffer-file-name so that binding it to nil is effective. */ |
82f8cd94 | 1394 | if (!NILP (fn) && ! NILP (BVAR (b, filename))) |
1ab256cb | 1395 | { |
37ef52bb | 1396 | bool already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1397 | if (!already && !NILP (flag)) |
1ab256cb | 1398 | lock_file (fn); |
265a9e55 | 1399 | else if (already && NILP (flag)) |
1ab256cb RM |
1400 | unlock_file (fn); |
1401 | } | |
1402 | #endif /* CLASH_DETECTION */ | |
1403 | ||
0b5397c2 SM |
1404 | /* Here we have a problem. SAVE_MODIFF is used here to encode |
1405 | buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as | |
1406 | recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we | |
1407 | modify SAVE_MODIFF to affect one, we may affect the other | |
1408 | as well. | |
1409 | E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but | |
1410 | if SAVE_MODIFF<auto_save_modified that means we risk changing | |
1411 | recent-auto-save-p from t to nil. | |
1412 | Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified | |
1413 | we risk changing recent-auto-save-p from nil to t. */ | |
1414 | SAVE_MODIFF = (NILP (flag) | |
1415 | /* FIXME: This unavoidably sets recent-auto-save-p to nil. */ | |
1416 | ? MODIFF | |
1417 | /* Let's try to preserve recent-auto-save-p. */ | |
1418 | : SAVE_MODIFF < MODIFF ? SAVE_MODIFF | |
1419 | /* If SAVE_MODIFF == auto_save_modified == MODIFF, | |
1420 | we can either decrease SAVE_MODIFF and auto_save_modified | |
1421 | or increase MODIFF. */ | |
1422 | : MODIFF++); | |
177c0ea7 | 1423 | |
a8c21b48 GM |
1424 | return flag; |
1425 | } | |
1426 | ||
1ab256cb | 1427 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1428 | 0, 1, 0, |
7ee72033 | 1429 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
2f064abf JB |
1430 | Each buffer has a tick counter which is incremented each time the |
1431 | text in that buffer is changed. It wraps around occasionally. | |
7ee72033 | 1432 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1433 | (register Lisp_Object buffer) |
1ab256cb RM |
1434 | { |
1435 | register struct buffer *buf; | |
265a9e55 | 1436 | if (NILP (buffer)) |
1ab256cb RM |
1437 | buf = current_buffer; |
1438 | else | |
1439 | { | |
b7826503 | 1440 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1441 | buf = XBUFFER (buffer); |
1442 | } | |
1443 | ||
1444 | return make_number (BUF_MODIFF (buf)); | |
1445 | } | |
3e145152 CY |
1446 | |
1447 | DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick, | |
1448 | Sbuffer_chars_modified_tick, 0, 1, 0, | |
1449 | doc: /* Return BUFFER's character-change tick counter. | |
1450 | Each buffer has a character-change tick counter, which is set to the | |
1451 | value of the buffer's tick counter \(see `buffer-modified-tick'), each | |
1452 | time text in that buffer is inserted or deleted. By comparing the | |
12bd42be | 1453 | values returned by two individual calls of `buffer-chars-modified-tick', |
3e145152 CY |
1454 | you can tell whether a character change occurred in that buffer in |
1455 | between these calls. No argument or nil as argument means use current | |
1456 | buffer as BUFFER. */) | |
5842a27b | 1457 | (register Lisp_Object buffer) |
3e145152 CY |
1458 | { |
1459 | register struct buffer *buf; | |
1460 | if (NILP (buffer)) | |
1461 | buf = current_buffer; | |
1462 | else | |
1463 | { | |
1464 | CHECK_BUFFER (buffer); | |
1465 | buf = XBUFFER (buffer); | |
1466 | } | |
1467 | ||
1468 | return make_number (BUF_CHARS_MODIFF (buf)); | |
1469 | } | |
1ab256cb | 1470 | \f |
01050cb5 | 1471 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
c7d97628 JL |
1472 | "(list (read-string \"Rename buffer (to new name): \" \ |
1473 | nil 'buffer-name-history (buffer-name (current-buffer))) \ | |
1474 | current-prefix-arg)", | |
7ee72033 | 1475 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1476 | If second arg UNIQUE is nil or omitted, it is an error if a |
1477 | buffer named NEWNAME already exists. | |
1478 | If UNIQUE is non-nil, come up with a new name using | |
1479 | `generate-new-buffer-name'. | |
1480 | Interactively, you can set UNIQUE with a prefix argument. | |
1481 | We return the name we actually gave the buffer. | |
7ee72033 | 1482 | This does not change the name of the visited file (if any). */) |
5842a27b | 1483 | (register Lisp_Object newname, Lisp_Object unique) |
1ab256cb RM |
1484 | { |
1485 | register Lisp_Object tem, buf; | |
1486 | ||
b7826503 | 1487 | CHECK_STRING (newname); |
d59698c4 | 1488 | |
d5db4077 | 1489 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1490 | error ("Empty string is invalid as a buffer name"); |
1491 | ||
489c043a | 1492 | tem = Fget_buffer (newname); |
265a9e55 | 1493 | if (!NILP (tem)) |
01050cb5 | 1494 | { |
8801a864 KR |
1495 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1496 | rename the buffer automatically so you can create another | |
1497 | with the original name. It makes UNIQUE equivalent to | |
1498 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1499 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
4b4deea2 | 1500 | return BVAR (current_buffer, name); |
3bd779aa | 1501 | if (!NILP (unique)) |
4b4deea2 | 1502 | newname = Fgenerate_new_buffer_name (newname, BVAR (current_buffer, name)); |
01050cb5 | 1503 | else |
d5db4077 | 1504 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1505 | } |
1ab256cb | 1506 | |
39eb03f1 | 1507 | bset_name (current_buffer, newname); |
76f590d7 JB |
1508 | |
1509 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1510 | any windows displaying current_buffer will stay unchanged. */ | |
2ec9db5d | 1511 | update_mode_lines = 11; |
76f590d7 | 1512 | |
67180c6a | 1513 | XSETBUFFER (buf, current_buffer); |
489c043a | 1514 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
4b4deea2 TT |
1515 | if (NILP (BVAR (current_buffer, filename)) |
1516 | && !NILP (BVAR (current_buffer, auto_save_file_name))) | |
1ab256cb | 1517 | call0 (intern ("rename-auto-save-file")); |
9397e56f MR |
1518 | |
1519 | /* Run buffer-list-update-hook. */ | |
1520 | if (!NILP (Vrun_hooks)) | |
1521 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1522 | ||
fb5eba9c | 1523 | /* Refetch since that last call may have done GC. */ |
4b4deea2 | 1524 | return BVAR (current_buffer, name); |
1ab256cb RM |
1525 | } |
1526 | ||
ed08365b DA |
1527 | /* True if B can be used as 'other-than-BUFFER' buffer. */ |
1528 | ||
1529 | static bool | |
1530 | candidate_buffer (Lisp_Object b, Lisp_Object buffer) | |
1531 | { | |
1532 | return (BUFFERP (b) && !EQ (b, buffer) | |
1533 | && BUFFER_LIVE_P (XBUFFER (b)) | |
1534 | && !BUFFER_HIDDEN_P (XBUFFER (b))); | |
1535 | } | |
84575e67 | 1536 | |
a7ca3326 | 1537 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1538 | doc: /* Return most recently selected buffer other than BUFFER. |
9397e56f MR |
1539 | Buffers not visible in windows are preferred to visible buffers, unless |
1540 | optional second argument VISIBLE-OK is non-nil. Ignore the argument | |
1541 | BUFFER unless it denotes a live buffer. If the optional third argument | |
1542 | FRAME is non-nil, use that frame's buffer list instead of the selected | |
1543 | frame's buffer list. | |
1544 | ||
1545 | The buffer is found by scanning the selected or specified frame's buffer | |
1546 | list first, followed by the list of all buffers. If no other buffer | |
1547 | exists, return the buffer `*scratch*' (creating it if necessary). */) | |
5842a27b | 1548 | (register Lisp_Object buffer, Lisp_Object visible_ok, Lisp_Object frame) |
1ab256cb | 1549 | { |
d9f07150 DA |
1550 | struct frame *f = decode_any_frame (frame); |
1551 | Lisp_Object tail = f->buffer_list, pred = f->buffer_predicate; | |
1552 | Lisp_Object buf, notsogood = Qnil; | |
1ab256cb | 1553 | |
9397e56f | 1554 | /* Consider buffers that have been seen in the frame first. */ |
9397e56f | 1555 | for (; CONSP (tail); tail = XCDR (tail)) |
7962a441 | 1556 | { |
9397e56f | 1557 | buf = XCAR (tail); |
ed08365b | 1558 | if (candidate_buffer (buf, buffer) |
9397e56f MR |
1559 | /* If the frame has a buffer_predicate, disregard buffers that |
1560 | don't fit the predicate. */ | |
1561 | && (NILP (pred) || !NILP (call1 (pred, buf)))) | |
1562 | { | |
1563 | if (!NILP (visible_ok) | |
1564 | || NILP (Fget_buffer_window (buf, Qvisible))) | |
1565 | return buf; | |
1566 | else if (NILP (notsogood)) | |
1567 | notsogood = buf; | |
1568 | } | |
7962a441 | 1569 | } |
7962a441 | 1570 | |
9397e56f | 1571 | /* Consider alist of all buffers next. */ |
8f3a2c26 | 1572 | FOR_EACH_LIVE_BUFFER (tail, buf) |
1ab256cb | 1573 | { |
ed08365b | 1574 | if (candidate_buffer (buf, buffer) |
9397e56f MR |
1575 | /* If the frame has a buffer_predicate, disregard buffers that |
1576 | don't fit the predicate. */ | |
1577 | && (NILP (pred) || !NILP (call1 (pred, buf)))) | |
1578 | { | |
1579 | if (!NILP (visible_ok) | |
1580 | || NILP (Fget_buffer_window (buf, Qvisible))) | |
1581 | return buf; | |
1582 | else if (NILP (notsogood)) | |
1583 | notsogood = buf; | |
1584 | } | |
1585 | } | |
1586 | ||
1587 | if (!NILP (notsogood)) | |
1588 | return notsogood; | |
1589 | else | |
1590 | { | |
1591 | buf = Fget_buffer (build_string ("*scratch*")); | |
6b61353c | 1592 | if (NILP (buf)) |
04ae1b48 | 1593 | { |
9397e56f MR |
1594 | buf = Fget_buffer_create (build_string ("*scratch*")); |
1595 | Fset_buffer_major_mode (buf); | |
04ae1b48 | 1596 | } |
9397e56f MR |
1597 | return buf; |
1598 | } | |
1599 | } | |
04ae1b48 | 1600 | |
9397e56f MR |
1601 | /* The following function is a safe variant of Fother_buffer: It doesn't |
1602 | pay attention to any frame-local buffer lists, doesn't care about | |
1603 | visibility of buffers, and doesn't evaluate any frame predicates. */ | |
1604 | ||
1605 | Lisp_Object | |
1606 | other_buffer_safely (Lisp_Object buffer) | |
1607 | { | |
9397e56f MR |
1608 | Lisp_Object tail, buf; |
1609 | ||
8f3a2c26 DA |
1610 | FOR_EACH_LIVE_BUFFER (tail, buf) |
1611 | if (candidate_buffer (buf, buffer)) | |
1612 | return buf; | |
9397e56f | 1613 | |
dba1a30a GM |
1614 | buf = Fget_buffer (build_string ("*scratch*")); |
1615 | if (NILP (buf)) | |
1616 | { | |
1617 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1618 | Fset_buffer_major_mode (buf); | |
1619 | } | |
9397e56f | 1620 | |
89132f25 | 1621 | return buf; |
1ab256cb RM |
1622 | } |
1623 | \f | |
a7ca3326 | 1624 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
1ab256cb | 1625 | 0, 1, "", |
7ee72033 MB |
1626 | doc: /* Start keeping undo information for buffer BUFFER. |
1627 | No argument or nil as argument means do this for the current buffer. */) | |
5842a27b | 1628 | (register Lisp_Object buffer) |
1ab256cb | 1629 | { |
ffd56f97 | 1630 | Lisp_Object real_buffer; |
1ab256cb | 1631 | |
ffd56f97 | 1632 | if (NILP (buffer)) |
67180c6a | 1633 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1634 | else |
1635 | { | |
ffd56f97 JB |
1636 | real_buffer = Fget_buffer (buffer); |
1637 | if (NILP (real_buffer)) | |
1638 | nsberror (buffer); | |
1ab256cb RM |
1639 | } |
1640 | ||
4b4deea2 | 1641 | if (EQ (BVAR (XBUFFER (real_buffer), undo_list), Qt)) |
39eb03f1 | 1642 | bset_undo_list (XBUFFER (real_buffer), Qnil); |
1ab256cb RM |
1643 | |
1644 | return Qnil; | |
1645 | } | |
1646 | ||
9cd47b72 DA |
1647 | /* Truncate undo list and shrink the gap of BUFFER. */ |
1648 | ||
37ef52bb | 1649 | void |
9cd47b72 DA |
1650 | compact_buffer (struct buffer *buffer) |
1651 | { | |
f0863a54 | 1652 | BUFFER_CHECK_INDIRECTION (buffer); |
9928463d | 1653 | |
9cd47b72 DA |
1654 | /* Skip dead buffers, indirect buffers and buffers |
1655 | which aren't changed since last compaction. */ | |
f0863a54 | 1656 | if (BUFFER_LIVE_P (buffer) |
9cd47b72 | 1657 | && (buffer->base_buffer == NULL) |
f9e7c67e | 1658 | && (BUF_COMPACT (buffer) != BUF_MODIFF (buffer))) |
9cd47b72 DA |
1659 | { |
1660 | /* If a buffer's undo list is Qt, that means that undo is | |
1661 | turned off in that buffer. Calling truncate_undo_list on | |
1662 | Qt tends to return NULL, which effectively turns undo back on. | |
1663 | So don't call truncate_undo_list if undo_list is Qt. */ | |
e34f7f79 | 1664 | if (!EQ (buffer->INTERNAL_FIELD (undo_list), Qt)) |
9cd47b72 DA |
1665 | truncate_undo_list (buffer); |
1666 | ||
1667 | /* Shrink buffer gaps. */ | |
1668 | if (!buffer->text->inhibit_shrinking) | |
1669 | { | |
1670 | /* If a buffer's gap size is more than 10% of the buffer | |
eefd7278 DA |
1671 | size, or larger than GAP_BYTES_DFL bytes, then shrink it |
1672 | accordingly. Keep a minimum size of GAP_BYTES_MIN bytes. */ | |
1673 | ptrdiff_t size = clip_to_bounds (GAP_BYTES_MIN, | |
1674 | BUF_Z_BYTE (buffer) / 10, | |
1675 | GAP_BYTES_DFL); | |
1676 | if (BUF_GAP_SIZE (buffer) > size) | |
1677 | make_gap_1 (buffer, -(BUF_GAP_SIZE (buffer) - size)); | |
9cd47b72 | 1678 | } |
f9e7c67e | 1679 | BUF_COMPACT (buffer) = BUF_MODIFF (buffer); |
9cd47b72 | 1680 | } |
9cd47b72 DA |
1681 | } |
1682 | ||
a7ca3326 | 1683 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 0, 1, "bKill buffer: ", |
b7e8d081 | 1684 | doc: /* Kill the buffer specified by BUFFER-OR-NAME. |
c8804c4f MR |
1685 | The argument may be a buffer or the name of an existing buffer. |
1686 | Argument nil or omitted means kill the current buffer. Return t if the | |
1687 | buffer is actually killed, nil otherwise. | |
1688 | ||
b7e8d081 MR |
1689 | The functions in `kill-buffer-query-functions' are called with the |
1690 | buffer to be killed as the current buffer. If any of them returns nil, | |
1691 | the buffer is not killed. The hook `kill-buffer-hook' is run before the | |
1692 | buffer is actually killed. The buffer being killed will be current | |
1693 | while the hook is running. Functions called by any of these hooks are | |
1694 | supposed to not change the current buffer. | |
018ba359 PJ |
1695 | |
1696 | Any processes that have this buffer as the `process-buffer' are killed | |
b7e8d081 MR |
1697 | with SIGHUP. This function calls `replace-buffer-in-windows' for |
1698 | cleaning up all windows currently displaying the buffer to be killed. */) | |
5842a27b | 1699 | (Lisp_Object buffer_or_name) |
1ab256cb | 1700 | { |
c8804c4f | 1701 | Lisp_Object buffer; |
1ab256cb RM |
1702 | register struct buffer *b; |
1703 | register Lisp_Object tem; | |
1704 | register struct Lisp_Marker *m; | |
6af718a4 | 1705 | struct gcpro gcpro1; |
1ab256cb | 1706 | |
c8804c4f MR |
1707 | if (NILP (buffer_or_name)) |
1708 | buffer = Fcurrent_buffer (); | |
1ab256cb | 1709 | else |
c8804c4f MR |
1710 | buffer = Fget_buffer (buffer_or_name); |
1711 | if (NILP (buffer)) | |
1712 | nsberror (buffer_or_name); | |
1ab256cb | 1713 | |
c8804c4f | 1714 | b = XBUFFER (buffer); |
1ab256cb | 1715 | |
4a4a9db5 | 1716 | /* Avoid trouble for buffer already dead. */ |
e578f381 | 1717 | if (!BUFFER_LIVE_P (b)) |
4a4a9db5 KH |
1718 | return Qnil; |
1719 | ||
dcdffbf6 | 1720 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1721 | { |
d311d28c | 1722 | ptrdiff_t count = SPECPDL_INDEX (); |
5b20caf0 | 1723 | Lisp_Object arglist[1]; |
1ab256cb RM |
1724 | |
1725 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1726 | set_buffer_internal (b); | |
dcdffbf6 RS |
1727 | |
1728 | /* First run the query functions; if any query is answered no, | |
1729 | don't kill the buffer. */ | |
5b20caf0 | 1730 | arglist[0] = Qkill_buffer_query_functions; |
09706e1f KR |
1731 | tem = Frun_hook_with_args_until_failure (1, arglist); |
1732 | if (NILP (tem)) | |
5b20caf0 | 1733 | return unbind_to (count, Qnil); |
dcdffbf6 | 1734 | |
ef099a94 MN |
1735 | /* Query if the buffer is still modified. */ |
1736 | if (INTERACTIVE && !NILP (BVAR (b, filename)) | |
1737 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
1738 | { | |
1739 | GCPRO1 (buffer); | |
1740 | tem = do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ", | |
1741 | BVAR (b, name), make_number (0))); | |
1742 | UNGCPRO; | |
1743 | if (NILP (tem)) | |
1744 | return unbind_to (count, Qnil); | |
1745 | } | |
1746 | ||
1747 | /* If the hooks have killed the buffer, exit now. */ | |
1748 | if (!BUFFER_LIVE_P (b)) | |
1749 | return unbind_to (count, Qt); | |
1750 | ||
dcdffbf6 | 1751 | /* Then run the hooks. */ |
f1597a3a | 1752 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1753 | unbind_to (count, Qnil); |
1754 | } | |
1755 | ||
b7e8d081 | 1756 | /* If the hooks have killed the buffer, exit now. */ |
e578f381 | 1757 | if (!BUFFER_LIVE_P (b)) |
b7e8d081 MR |
1758 | return Qt; |
1759 | ||
1ab256cb RM |
1760 | /* We have no more questions to ask. Verify that it is valid |
1761 | to kill the buffer. This must be done after the questions | |
1762 | since anything can happen within do_yes_or_no_p. */ | |
1763 | ||
1764 | /* Don't kill the minibuffer now current. */ | |
e74aeda8 | 1765 | if (EQ (buffer, XWINDOW (minibuf_window)->contents)) |
1ab256cb RM |
1766 | return Qnil; |
1767 | ||
9928463d DA |
1768 | /* When we kill an ordinary buffer which shares it's buffer text |
1769 | with indirect buffer(s), we must kill indirect buffer(s) too. | |
336cd056 RS |
1770 | We do it at this stage so nothing terrible happens if they |
1771 | ask questions or their hooks get errors. */ | |
9928463d | 1772 | if (!b->base_buffer && b->indirections > 0) |
336cd056 RS |
1773 | { |
1774 | struct buffer *other; | |
1775 | ||
c8804c4f | 1776 | GCPRO1 (buffer); |
336cd056 | 1777 | |
52b852c7 | 1778 | FOR_EACH_BUFFER (other) |
d17337e5 | 1779 | if (other->base_buffer == b) |
336cd056 | 1780 | { |
8f54f30a PE |
1781 | Lisp_Object buf; |
1782 | XSETBUFFER (buf, other); | |
1783 | Fkill_buffer (buf); | |
336cd056 RS |
1784 | } |
1785 | ||
1786 | UNGCPRO; | |
b7e8d081 MR |
1787 | |
1788 | /* Exit if we now have killed the base buffer (Bug#11665). */ | |
e578f381 | 1789 | if (!BUFFER_LIVE_P (b)) |
b7e8d081 | 1790 | return Qt; |
336cd056 | 1791 | } |
177c0ea7 | 1792 | |
56e2e794 MR |
1793 | /* Run replace_buffer_in_windows before making another buffer current |
1794 | since set-window-buffer-start-and-point will refuse to make another | |
1795 | buffer current if the selected window does not show the current | |
ecda65d4 | 1796 | buffer (bug#10114). */ |
56e2e794 MR |
1797 | replace_buffer_in_windows (buffer); |
1798 | ||
b7e8d081 | 1799 | /* Exit if replacing the buffer in windows has killed our buffer. */ |
e578f381 | 1800 | if (!BUFFER_LIVE_P (b)) |
b7e8d081 MR |
1801 | return Qt; |
1802 | ||
1803 | /* Make this buffer not be current. Exit if it is the sole visible | |
1804 | buffer. */ | |
1ab256cb RM |
1805 | if (b == current_buffer) |
1806 | { | |
c8804c4f | 1807 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1ab256cb RM |
1808 | Fset_buffer (tem); |
1809 | if (b == current_buffer) | |
1810 | return Qnil; | |
1811 | } | |
1812 | ||
b7e8d081 MR |
1813 | /* If the buffer now current is shown in the minibuffer and our buffer |
1814 | is the sole other buffer give up. */ | |
77270fac | 1815 | XSETBUFFER (tem, current_buffer); |
e74aeda8 | 1816 | if (EQ (tem, XWINDOW (minibuf_window)->contents) |
b7e8d081 MR |
1817 | && EQ (buffer, Fother_buffer (buffer, Qnil, Qnil))) |
1818 | return Qnil; | |
77270fac | 1819 | |
1ab256cb RM |
1820 | /* Now there is no question: we can kill the buffer. */ |
1821 | ||
1822 | #ifdef CLASH_DETECTION | |
1823 | /* Unlock this buffer's file, if it is locked. */ | |
1824 | unlock_buffer (b); | |
1825 | #endif /* CLASH_DETECTION */ | |
1826 | ||
c8804c4f MR |
1827 | GCPRO1 (buffer); |
1828 | kill_buffer_processes (buffer); | |
49da74e6 KS |
1829 | UNGCPRO; |
1830 | ||
b7e8d081 MR |
1831 | /* Killing buffer processes may run sentinels which may have killed |
1832 | our buffer. */ | |
e578f381 | 1833 | if (!BUFFER_LIVE_P (b)) |
b7e8d081 | 1834 | return Qt; |
49da74e6 | 1835 | |
9397e56f MR |
1836 | /* These may run Lisp code and into infinite loops (if someone |
1837 | insisted on circular lists) so allow quitting here. */ | |
9397e56f MR |
1838 | frames_discard_buffer (buffer); |
1839 | ||
b93fb365 | 1840 | clear_charpos_cache (b); |
1ab256cb RM |
1841 | |
1842 | tem = Vinhibit_quit; | |
1843 | Vinhibit_quit = Qt; | |
9397e56f | 1844 | /* Remove the buffer from the list of all buffers. */ |
c8804c4f | 1845 | Vbuffer_alist = Fdelq (Frassq (buffer, Vbuffer_alist), Vbuffer_alist); |
b7e8d081 | 1846 | /* If replace_buffer_in_windows didn't do its job fix that now. */ |
9397e56f | 1847 | replace_buffer_in_windows_safely (buffer); |
1ab256cb RM |
1848 | Vinhibit_quit = tem; |
1849 | ||
9cf712eb RS |
1850 | /* Delete any auto-save file, if we saved it in this session. |
1851 | But not if the buffer is modified. */ | |
4b4deea2 | 1852 | if (STRINGP (BVAR (b, auto_save_file_name)) |
0b5397c2 SM |
1853 | && BUF_AUTOSAVE_MODIFF (b) != 0 |
1854 | && BUF_SAVE_MODIFF (b) < BUF_AUTOSAVE_MODIFF (b) | |
6b61353c KH |
1855 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
1856 | && NILP (Fsymbol_value (intern ("auto-save-visited-file-name")))) | |
1ab256cb | 1857 | { |
8f54f30a PE |
1858 | Lisp_Object delete; |
1859 | delete = Fsymbol_value (intern ("delete-auto-save-files")); | |
1860 | if (! NILP (delete)) | |
4b4deea2 | 1861 | internal_delete_file (BVAR (b, auto_save_file_name)); |
1ab256cb RM |
1862 | } |
1863 | ||
b7e8d081 | 1864 | /* Deleting an auto-save file could have killed our buffer. */ |
e578f381 | 1865 | if (!BUFFER_LIVE_P (b)) |
b7e8d081 MR |
1866 | return Qt; |
1867 | ||
4a4a9db5 KH |
1868 | if (b->base_buffer) |
1869 | { | |
d556ebf9 DA |
1870 | /* Unchain all markers that belong to this indirect buffer. |
1871 | Don't unchain the markers that belong to the base buffer | |
1872 | or its other indirect buffers. */ | |
1873 | struct Lisp_Marker **mp = &BUF_MARKERS (b); | |
1874 | while ((m = *mp)) | |
1875 | { | |
1876 | if (m->buffer == b) | |
1877 | { | |
1878 | m->buffer = NULL; | |
389a94a5 | 1879 | *mp = m->next; |
d556ebf9 DA |
1880 | } |
1881 | else | |
1882 | mp = &m->next; | |
1883 | } | |
4a4a9db5 KH |
1884 | } |
1885 | else | |
1ab256cb | 1886 | { |
4a4a9db5 | 1887 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1888 | and leave them pointing nowhere. */ |
65745fad | 1889 | for (m = BUF_MARKERS (b); m; ) |
336cd056 | 1890 | { |
65745fad | 1891 | struct Lisp_Marker *next = m->next; |
336cd056 | 1892 | m->buffer = 0; |
65745fad SM |
1893 | m->next = NULL; |
1894 | m = next; | |
336cd056 | 1895 | } |
65745fad | 1896 | BUF_MARKERS (b) = NULL; |
0c94c8d6 | 1897 | set_buffer_intervals (b, NULL); |
336cd056 | 1898 | |
389a94a5 | 1899 | /* Perhaps we should explicitly free the interval tree here... */ |
336cd056 | 1900 | } |
389a94a5 SM |
1901 | /* Since we've unlinked the markers, the overlays can't be here any more |
1902 | either. */ | |
1903 | b->overlays_before = NULL; | |
1904 | b->overlays_after = NULL; | |
33f7013e | 1905 | |
2f3f993b RS |
1906 | /* Reset the local variables, so that this buffer's local values |
1907 | won't be protected from GC. They would be protected | |
e4769531 | 1908 | if they happened to remain cached in their symbols. |
2f3f993b RS |
1909 | This gets rid of them for certain. */ |
1910 | swap_out_buffer_local_variables (b); | |
13de9290 | 1911 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1912 | |
39eb03f1 | 1913 | bset_name (b, Qnil); |
336cd056 | 1914 | |
4d7e6e51 | 1915 | block_input (); |
04e9897c DA |
1916 | if (b->base_buffer) |
1917 | { | |
1918 | /* Notify our base buffer that we don't share the text anymore. */ | |
1919 | eassert (b->indirections == -1); | |
1920 | b->base_buffer->indirections--; | |
1921 | eassert (b->base_buffer->indirections >= 0); | |
98a07056 DA |
1922 | /* Make sure that we wasn't confused. */ |
1923 | eassert (b->window_count == -1); | |
04e9897c DA |
1924 | } |
1925 | else | |
98a07056 DA |
1926 | { |
1927 | /* Make sure that no one shows us. */ | |
1928 | eassert (b->window_count == 0); | |
1929 | /* No one shares our buffer text, can free it. */ | |
1930 | free_buffer_text (b); | |
1931 | } | |
336cd056 | 1932 | |
28e969dd JB |
1933 | if (b->newline_cache) |
1934 | { | |
1935 | free_region_cache (b->newline_cache); | |
1936 | b->newline_cache = 0; | |
1937 | } | |
1938 | if (b->width_run_cache) | |
1939 | { | |
1940 | free_region_cache (b->width_run_cache); | |
1941 | b->width_run_cache = 0; | |
1942 | } | |
e30b79c1 DA |
1943 | if (b->bidi_paragraph_cache) |
1944 | { | |
1945 | free_region_cache (b->bidi_paragraph_cache); | |
1946 | b->bidi_paragraph_cache = 0; | |
1947 | } | |
39eb03f1 | 1948 | bset_width_table (b, Qnil); |
4d7e6e51 | 1949 | unblock_input (); |
39eb03f1 | 1950 | bset_undo_list (b, Qnil); |
1ab256cb | 1951 | |
9397e56f MR |
1952 | /* Run buffer-list-update-hook. */ |
1953 | if (!NILP (Vrun_hooks)) | |
1954 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1955 | ||
1ab256cb RM |
1956 | return Qt; |
1957 | } | |
1958 | \f | |
9397e56f MR |
1959 | /* Move association for BUFFER to the front of buffer (a)lists. Since |
1960 | we do this each time BUFFER is selected visibly, the more recently | |
1961 | selected buffers are always closer to the front of those lists. This | |
1962 | means that other_buffer is more likely to choose a relevant buffer. | |
1963 | ||
1964 | Note that this moves BUFFER to the front of the buffer lists of the | |
1965 | selected frame even if BUFFER is not shown there. If BUFFER is not | |
1966 | shown in the selected frame, consider the present behavior a feature. | |
1967 | `select-window' gets this right since it shows BUFFER in the selected | |
1968 | window when calling us. */ | |
1ab256cb | 1969 | |
01136e9b | 1970 | void |
9397e56f | 1971 | record_buffer (Lisp_Object buffer) |
1ab256cb | 1972 | { |
4475bec4 | 1973 | Lisp_Object aelt, aelt_cons, tem; |
9397e56f | 1974 | register struct frame *f = XFRAME (selected_frame); |
1ab256cb | 1975 | |
9397e56f | 1976 | CHECK_BUFFER (buffer); |
1ab256cb | 1977 | |
9397e56f MR |
1978 | /* Update Vbuffer_alist (we know that it has an entry for BUFFER). |
1979 | Don't allow quitting since this might leave the buffer list in an | |
1980 | inconsistent state. */ | |
1981 | tem = Vinhibit_quit; | |
1982 | Vinhibit_quit = Qt; | |
1983 | aelt = Frassq (buffer, Vbuffer_alist); | |
4475bec4 | 1984 | aelt_cons = Fmemq (aelt, Vbuffer_alist); |
9397e56f | 1985 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
4475bec4 PE |
1986 | XSETCDR (aelt_cons, Vbuffer_alist); |
1987 | Vbuffer_alist = aelt_cons; | |
9397e56f | 1988 | Vinhibit_quit = tem; |
1ab256cb | 1989 | |
9397e56f | 1990 | /* Update buffer list of selected frame. */ |
f00af5b1 PE |
1991 | fset_buffer_list (f, Fcons (buffer, Fdelq (buffer, f->buffer_list))); |
1992 | fset_buried_buffer_list (f, Fdelq (buffer, f->buried_buffer_list)); | |
177c0ea7 | 1993 | |
9397e56f MR |
1994 | /* Run buffer-list-update-hook. */ |
1995 | if (!NILP (Vrun_hooks)) | |
1996 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1997 | } | |
7962a441 | 1998 | |
7962a441 | 1999 | |
e4ed06f1 CY |
2000 | /* Move BUFFER to the end of the buffer (a)lists. Do nothing if the |
2001 | buffer is killed. For the selected frame's buffer list this moves | |
2002 | BUFFER to its end even if it was never shown in that frame. If | |
96a72ee9 | 2003 | this happens we have a feature, hence `bury-buffer-internal' should be |
e4ed06f1 | 2004 | called only when BUFFER was shown in the selected frame. */ |
7962a441 | 2005 | |
e4ed06f1 CY |
2006 | DEFUN ("bury-buffer-internal", Fbury_buffer_internal, Sbury_buffer_internal, |
2007 | 1, 1, 0, | |
2008 | doc: /* Move BUFFER to the end of the buffer list. */) | |
9397e56f MR |
2009 | (Lisp_Object buffer) |
2010 | { | |
4475bec4 | 2011 | Lisp_Object aelt, aelt_cons, tem; |
9397e56f | 2012 | register struct frame *f = XFRAME (selected_frame); |
7962a441 | 2013 | |
9397e56f | 2014 | CHECK_BUFFER (buffer); |
177c0ea7 | 2015 | |
9397e56f MR |
2016 | /* Update Vbuffer_alist (we know that it has an entry for BUFFER). |
2017 | Don't allow quitting since this might leave the buffer list in an | |
2018 | inconsistent state. */ | |
2019 | tem = Vinhibit_quit; | |
2020 | Vinhibit_quit = Qt; | |
2021 | aelt = Frassq (buffer, Vbuffer_alist); | |
4475bec4 | 2022 | aelt_cons = Fmemq (aelt, Vbuffer_alist); |
9397e56f | 2023 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
4475bec4 PE |
2024 | XSETCDR (aelt_cons, Qnil); |
2025 | Vbuffer_alist = nconc2 (Vbuffer_alist, aelt_cons); | |
9397e56f MR |
2026 | Vinhibit_quit = tem; |
2027 | ||
2028 | /* Update buffer lists of selected frame. */ | |
f00af5b1 PE |
2029 | fset_buffer_list (f, Fdelq (buffer, f->buffer_list)); |
2030 | fset_buried_buffer_list | |
2031 | (f, Fcons (buffer, Fdelq (buffer, f->buried_buffer_list))); | |
9397e56f MR |
2032 | |
2033 | /* Run buffer-list-update-hook. */ | |
2034 | if (!NILP (Vrun_hooks)) | |
2035 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
2036 | ||
e4ed06f1 | 2037 | return Qnil; |
1ab256cb RM |
2038 | } |
2039 | ||
a9ee7a59 | 2040 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 2041 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 2042 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
c1f02afa | 2043 | according to the default value of `major-mode'. |
018ba359 | 2044 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 | 2045 | the current buffer's major mode. */) |
5842a27b | 2046 | (Lisp_Object buffer) |
a9ee7a59 | 2047 | { |
d311d28c | 2048 | ptrdiff_t count; |
a9ee7a59 KH |
2049 | Lisp_Object function; |
2050 | ||
ea4fddd8 JB |
2051 | CHECK_BUFFER (buffer); |
2052 | ||
e578f381 | 2053 | if (!BUFFER_LIVE_P (XBUFFER (buffer))) |
4f2daf31 DA |
2054 | error ("Attempt to set major mode for a dead buffer"); |
2055 | ||
2056 | if (strcmp (SSDATA (BVAR (XBUFFER (buffer), name)), "*scratch*") == 0) | |
71a0f2c6 GM |
2057 | function = find_symbol_value (intern ("initial-major-mode")); |
2058 | else | |
2059 | { | |
4b4deea2 | 2060 | function = BVAR (&buffer_defaults, major_mode); |
71a0f2c6 | 2061 | if (NILP (function) |
4b4deea2 TT |
2062 | && NILP (Fget (BVAR (current_buffer, major_mode), Qmode_class))) |
2063 | function = BVAR (current_buffer, major_mode); | |
71a0f2c6 | 2064 | } |
177c0ea7 | 2065 | |
48265e61 DL |
2066 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
2067 | return Qnil; | |
2068 | ||
aed13378 | 2069 | count = SPECPDL_INDEX (); |
a9ee7a59 | 2070 | |
48265e61 | 2071 | /* To select a nonfundamental mode, |
dee4ba59 | 2072 | select the buffer temporarily and then call the mode function. */ |
a9ee7a59 KH |
2073 | |
2074 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
2075 | ||
a2428fa2 | 2076 | Fset_buffer (buffer); |
48265e61 | 2077 | call0 (function); |
a9ee7a59 KH |
2078 | |
2079 | return unbind_to (count, Qnil); | |
2080 | } | |
2081 | ||
a7ca3326 | 2082 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, |
7ee72033 | 2083 | doc: /* Return the current buffer as a Lisp object. */) |
5842a27b | 2084 | (void) |
1ab256cb RM |
2085 | { |
2086 | register Lisp_Object buf; | |
67180c6a | 2087 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
2088 | return buf; |
2089 | } | |
c7aa5005 KH |
2090 | |
2091 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
2092 | This is used by redisplay. */ | |
2093 | ||
2094 | void | |
d3da34e0 | 2095 | set_buffer_internal_1 (register struct buffer *b) |
c7aa5005 KH |
2096 | { |
2097 | register struct buffer *old_buf; | |
ce5b453a | 2098 | register Lisp_Object tail; |
c7aa5005 | 2099 | |
b86af064 | 2100 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 2101 | if (b->text->beg == NULL) |
b86af064 GM |
2102 | enlarge_buffer_text (b, 0); |
2103 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
177c0ea7 | 2104 | |
c7aa5005 KH |
2105 | if (current_buffer == b) |
2106 | return; | |
2107 | ||
f0863a54 | 2108 | BUFFER_CHECK_INDIRECTION (b); |
68f8f1c0 | 2109 | |
1ab256cb RM |
2110 | old_buf = current_buffer; |
2111 | current_buffer = b; | |
dee4ba59 | 2112 | last_known_column_point = -1; /* Invalidate indentation cache. */ |
1ab256cb | 2113 | |
336cd056 RS |
2114 | if (old_buf) |
2115 | { | |
2116 | /* Put the undo list back in the base buffer, so that it appears | |
2117 | that an indirect buffer shares the undo list of its base. */ | |
2118 | if (old_buf->base_buffer) | |
39eb03f1 | 2119 | bset_undo_list (old_buf->base_buffer, BVAR (old_buf, undo_list)); |
336cd056 RS |
2120 | |
2121 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
2122 | when it is not current, update them now. */ | |
cffc6f3b | 2123 | record_buffer_markers (old_buf); |
336cd056 RS |
2124 | } |
2125 | ||
2126 | /* Get the undo list from the base buffer, so that it appears | |
2127 | that an indirect buffer shares the undo list of its base. */ | |
2128 | if (b->base_buffer) | |
39eb03f1 | 2129 | bset_undo_list (b, BVAR (b->base_buffer, undo_list)); |
336cd056 RS |
2130 | |
2131 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
2132 | when it is not current, fetch them now. */ | |
cffc6f3b | 2133 | fetch_buffer_markers (b); |
336cd056 | 2134 | |
1ab256cb | 2135 | /* Look down buffer's list of local Lisp variables |
dee4ba59 | 2136 | to find and update any that forward into C variables. */ |
1ab256cb | 2137 | |
ce5b453a | 2138 | do |
1ab256cb | 2139 | { |
4b4deea2 | 2140 | for (tail = BVAR (b, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
ce5b453a SM |
2141 | { |
2142 | Lisp_Object var = XCAR (XCAR (tail)); | |
2143 | struct Lisp_Symbol *sym = XSYMBOL (var); | |
2144 | if (sym->redirect == SYMBOL_LOCALIZED /* Just to be sure. */ | |
2145 | && SYMBOL_BLV (sym)->fwd) | |
2146 | /* Just reference the variable | |
2147 | to cause it to become set for this buffer. */ | |
2148 | Fsymbol_value (var); | |
2149 | } | |
1ab256cb | 2150 | } |
1ab256cb | 2151 | /* Do the same with any others that were local to the previous buffer */ |
ce5b453a | 2152 | while (b != old_buf && (b = old_buf, b)); |
1ab256cb RM |
2153 | } |
2154 | ||
336cd056 | 2155 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 2156 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
2157 | |
2158 | void | |
d3da34e0 | 2159 | set_buffer_temp (struct buffer *b) |
336cd056 RS |
2160 | { |
2161 | register struct buffer *old_buf; | |
2162 | ||
2163 | if (current_buffer == b) | |
2164 | return; | |
2165 | ||
2166 | old_buf = current_buffer; | |
2167 | current_buffer = b; | |
2168 | ||
cffc6f3b CY |
2169 | /* If the old current buffer has markers to record PT, BEGV and ZV |
2170 | when it is not current, update them now. */ | |
2171 | record_buffer_markers (old_buf); | |
336cd056 RS |
2172 | |
2173 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
2174 | when it is not current, fetch them now. */ | |
cffc6f3b | 2175 | fetch_buffer_markers (b); |
336cd056 RS |
2176 | } |
2177 | ||
a7ca3326 | 2178 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
c8804c4f MR |
2179 | doc: /* Make buffer BUFFER-OR-NAME current for editing operations. |
2180 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See | |
81749a23 | 2181 | also `with-current-buffer' when you want to make a buffer current |
c8804c4f MR |
2182 | temporarily. This function does not display the buffer, so its effect |
2183 | ends when the current command terminates. Use `switch-to-buffer' or | |
2184 | `pop-to-buffer' to switch buffers permanently. */) | |
5842a27b | 2185 | (register Lisp_Object buffer_or_name) |
1ab256cb | 2186 | { |
c8804c4f MR |
2187 | register Lisp_Object buffer; |
2188 | buffer = Fget_buffer (buffer_or_name); | |
2189 | if (NILP (buffer)) | |
2190 | nsberror (buffer_or_name); | |
e578f381 | 2191 | if (!BUFFER_LIVE_P (XBUFFER (buffer))) |
1ab256cb | 2192 | error ("Selecting deleted buffer"); |
c8804c4f MR |
2193 | set_buffer_internal (XBUFFER (buffer)); |
2194 | return buffer; | |
1ab256cb | 2195 | } |
d0628b06 | 2196 | |
27e498e6 PE |
2197 | void |
2198 | restore_buffer (Lisp_Object buffer_or_name) | |
2199 | { | |
2200 | Fset_buffer (buffer_or_name); | |
2201 | } | |
2202 | ||
66322887 | 2203 | /* Set the current buffer to BUFFER provided if it is alive. */ |
d0628b06 | 2204 | |
27e498e6 | 2205 | void |
d3da34e0 | 2206 | set_buffer_if_live (Lisp_Object buffer) |
d0628b06 | 2207 | { |
e578f381 | 2208 | if (BUFFER_LIVE_P (XBUFFER (buffer))) |
a3d794a1 | 2209 | set_buffer_internal (XBUFFER (buffer)); |
d0628b06 | 2210 | } |
1ab256cb | 2211 | \f |
a7ca3326 | 2212 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, |
1ab256cb | 2213 | Sbarf_if_buffer_read_only, 0, 0, 0, |
7ee72033 | 2214 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
5842a27b | 2215 | (void) |
1ab256cb | 2216 | { |
4b4deea2 | 2217 | if (!NILP (BVAR (current_buffer, read_only)) |
a96b68f1 | 2218 | && NILP (Vinhibit_read_only)) |
4c4dc0b0 | 2219 | xsignal1 (Qbuffer_read_only, Fcurrent_buffer ()); |
1ab256cb RM |
2220 | return Qnil; |
2221 | } | |
1ab256cb | 2222 | \f |
a7ca3326 | 2223 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 2224 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 2225 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 | 2226 | so the buffer is truly empty after this. */) |
5842a27b | 2227 | (void) |
1ab256cb RM |
2228 | { |
2229 | Fwiden (); | |
c0d9a0c3 GM |
2230 | |
2231 | del_range (BEG, Z); | |
c280bc6a | 2232 | |
1ab256cb RM |
2233 | current_buffer->last_window_start = 1; |
2234 | /* Prevent warnings, or suspension of auto saving, that would happen | |
2235 | if future size is less than past size. Use of erase-buffer | |
2236 | implies that the future text is not really related to the past text. */ | |
4b4deea2 | 2237 | XSETFASTINT (BVAR (current_buffer, save_length), 0); |
1ab256cb RM |
2238 | return Qnil; |
2239 | } | |
2240 | ||
01136e9b | 2241 | void |
d3da34e0 | 2242 | validate_region (register Lisp_Object *b, register Lisp_Object *e) |
1ab256cb | 2243 | { |
b7826503 PJ |
2244 | CHECK_NUMBER_COERCE_MARKER (*b); |
2245 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
2246 | |
2247 | if (XINT (*b) > XINT (*e)) | |
2248 | { | |
03192067 KH |
2249 | Lisp_Object tem; |
2250 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
2251 | } |
2252 | ||
d311d28c | 2253 | if (! (BEGV <= XINT (*b) && XINT (*e) <= ZV)) |
1ab256cb RM |
2254 | args_out_of_range (*b, *e); |
2255 | } | |
2256 | \f | |
b05525fa RS |
2257 | /* Advance BYTE_POS up to a character boundary |
2258 | and return the adjusted position. */ | |
2259 | ||
d311d28c PE |
2260 | static ptrdiff_t |
2261 | advance_to_char_boundary (ptrdiff_t byte_pos) | |
b05525fa | 2262 | { |
f8449323 | 2263 | int c; |
b05525fa | 2264 | |
f8449323 RS |
2265 | if (byte_pos == BEG) |
2266 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 2267 | return BEG; |
f8449323 RS |
2268 | |
2269 | c = FETCH_BYTE (byte_pos); | |
2270 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 2271 | { |
1be6387d | 2272 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 2273 | multibyte sequence. */ |
d311d28c | 2274 | ptrdiff_t orig_byte_pos = byte_pos; |
a9bcded1 KH |
2275 | |
2276 | do | |
2277 | { | |
2278 | byte_pos--; | |
2279 | c = FETCH_BYTE (byte_pos); | |
2280 | } | |
2281 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2282 | INC_POS (byte_pos); |
a9bcded1 KH |
2283 | if (byte_pos < orig_byte_pos) |
2284 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2285 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2286 | surely advance to the correct character boundary. If C is | |
2287 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2288 | } |
2289 | ||
20773569 | 2290 | return byte_pos; |
b05525fa RS |
2291 | } |
2292 | ||
13cda5f9 SM |
2293 | DEFUN ("buffer-swap-text", Fbuffer_swap_text, Sbuffer_swap_text, |
2294 | 1, 1, 0, | |
2295 | doc: /* Swap the text between current buffer and BUFFER. */) | |
5842a27b | 2296 | (Lisp_Object buffer) |
13cda5f9 SM |
2297 | { |
2298 | struct buffer *other_buffer; | |
2299 | CHECK_BUFFER (buffer); | |
2300 | other_buffer = XBUFFER (buffer); | |
2301 | ||
e578f381 | 2302 | if (!BUFFER_LIVE_P (other_buffer)) |
409f2919 | 2303 | error ("Cannot swap a dead buffer's text"); |
dc9cc574 | 2304 | |
13cda5f9 SM |
2305 | /* Actually, it probably works just fine. |
2306 | * if (other_buffer == current_buffer) | |
2307 | * error ("Cannot swap a buffer's text with itself"); */ | |
2308 | ||
2309 | /* Actually, this may be workable as well, tho probably only if they're | |
2310 | *both* indirect. */ | |
2311 | if (other_buffer->base_buffer | |
2312 | || current_buffer->base_buffer) | |
2313 | error ("Cannot swap indirect buffers's text"); | |
2314 | ||
2315 | { /* This is probably harder to make work. */ | |
2316 | struct buffer *other; | |
52b852c7 | 2317 | FOR_EACH_BUFFER (other) |
13cda5f9 SM |
2318 | if (other->base_buffer == other_buffer |
2319 | || other->base_buffer == current_buffer) | |
2320 | error ("One of the buffers to swap has indirect buffers"); | |
2321 | } | |
2322 | ||
2323 | #define swapfield(field, type) \ | |
2324 | do { \ | |
2325 | type tmp##field = other_buffer->field; \ | |
2326 | other_buffer->field = current_buffer->field; \ | |
2327 | current_buffer->field = tmp##field; \ | |
2328 | } while (0) | |
5d8ea120 TT |
2329 | #define swapfield_(field, type) \ |
2330 | do { \ | |
4b4deea2 | 2331 | type tmp##field = BVAR (other_buffer, field); \ |
39eb03f1 PE |
2332 | bset_##field (other_buffer, BVAR (current_buffer, field)); \ |
2333 | bset_##field (current_buffer, tmp##field); \ | |
5d8ea120 | 2334 | } while (0) |
13cda5f9 SM |
2335 | |
2336 | swapfield (own_text, struct buffer_text); | |
2337 | eassert (current_buffer->text == ¤t_buffer->own_text); | |
2338 | eassert (other_buffer->text == &other_buffer->own_text); | |
baae5c2d | 2339 | #ifdef REL_ALLOC |
261cb4bb PE |
2340 | r_alloc_reset_variable ((void **) ¤t_buffer->own_text.beg, |
2341 | (void **) &other_buffer->own_text.beg); | |
2342 | r_alloc_reset_variable ((void **) &other_buffer->own_text.beg, | |
2343 | (void **) ¤t_buffer->own_text.beg); | |
baae5c2d JR |
2344 | #endif /* REL_ALLOC */ |
2345 | ||
d311d28c PE |
2346 | swapfield (pt, ptrdiff_t); |
2347 | swapfield (pt_byte, ptrdiff_t); | |
2348 | swapfield (begv, ptrdiff_t); | |
2349 | swapfield (begv_byte, ptrdiff_t); | |
2350 | swapfield (zv, ptrdiff_t); | |
2351 | swapfield (zv_byte, ptrdiff_t); | |
13cda5f9 SM |
2352 | eassert (!current_buffer->base_buffer); |
2353 | eassert (!other_buffer->base_buffer); | |
372f8ffc | 2354 | swapfield (indirections, ptrdiff_t); |
13cda5f9 SM |
2355 | current_buffer->clip_changed = 1; other_buffer->clip_changed = 1; |
2356 | swapfield (newline_cache, struct region_cache *); | |
2357 | swapfield (width_run_cache, struct region_cache *); | |
e30b79c1 | 2358 | swapfield (bidi_paragraph_cache, struct region_cache *); |
13cda5f9 SM |
2359 | current_buffer->prevent_redisplay_optimizations_p = 1; |
2360 | other_buffer->prevent_redisplay_optimizations_p = 1; | |
2361 | swapfield (overlays_before, struct Lisp_Overlay *); | |
2362 | swapfield (overlays_after, struct Lisp_Overlay *); | |
d311d28c | 2363 | swapfield (overlay_center, ptrdiff_t); |
5d8ea120 TT |
2364 | swapfield_ (undo_list, Lisp_Object); |
2365 | swapfield_ (mark, Lisp_Object); | |
2366 | swapfield_ (enable_multibyte_characters, Lisp_Object); | |
2367 | swapfield_ (bidi_display_reordering, Lisp_Object); | |
2368 | swapfield_ (bidi_paragraph_direction, Lisp_Object); | |
13cda5f9 SM |
2369 | /* FIXME: Not sure what we should do with these *_marker fields. |
2370 | Hopefully they're just nil anyway. */ | |
5d8ea120 TT |
2371 | swapfield_ (pt_marker, Lisp_Object); |
2372 | swapfield_ (begv_marker, Lisp_Object); | |
2373 | swapfield_ (zv_marker, Lisp_Object); | |
39eb03f1 PE |
2374 | bset_point_before_scroll (current_buffer, Qnil); |
2375 | bset_point_before_scroll (other_buffer, Qnil); | |
13cda5f9 SM |
2376 | |
2377 | current_buffer->text->modiff++; other_buffer->text->modiff++; | |
2378 | current_buffer->text->chars_modiff++; other_buffer->text->chars_modiff++; | |
2379 | current_buffer->text->overlay_modiff++; other_buffer->text->overlay_modiff++; | |
2380 | current_buffer->text->beg_unchanged = current_buffer->text->gpt; | |
2381 | current_buffer->text->end_unchanged = current_buffer->text->gpt; | |
b8ff72fa SM |
2382 | other_buffer->text->beg_unchanged = other_buffer->text->gpt; |
2383 | other_buffer->text->end_unchanged = other_buffer->text->gpt; | |
13cda5f9 SM |
2384 | { |
2385 | struct Lisp_Marker *m; | |
2386 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) | |
2387 | if (m->buffer == other_buffer) | |
2388 | m->buffer = current_buffer; | |
b8ff72fa SM |
2389 | else |
2390 | /* Since there's no indirect buffer in sight, markers on | |
2391 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2392 | eassert (!m->buffer); | |
13cda5f9 SM |
2393 | for (m = BUF_MARKERS (other_buffer); m; m = m->next) |
2394 | if (m->buffer == current_buffer) | |
2395 | m->buffer = other_buffer; | |
b8ff72fa SM |
2396 | else |
2397 | /* Since there's no indirect buffer in sight, markers on | |
2398 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2399 | eassert (!m->buffer); | |
13cda5f9 | 2400 | } |
c7f53895 DA |
2401 | { /* Some of the C code expects that both window markers of a |
2402 | live window points to that window's buffer. So since we | |
2403 | just swapped the markers between the two buffers, we need | |
126f1fc1 | 2404 | to undo the effect of this swap for window markers. */ |
d2a95ffb | 2405 | Lisp_Object w = selected_window, ws = Qnil; |
126f1fc1 SM |
2406 | Lisp_Object buf1, buf2; |
2407 | XSETBUFFER (buf1, current_buffer); XSETBUFFER (buf2, other_buffer); | |
2408 | ||
2409 | while (NILP (Fmemq (w, ws))) | |
2410 | { | |
2411 | ws = Fcons (w, ws); | |
d3d50620 | 2412 | if (MARKERP (XWINDOW (w)->pointm) |
e74aeda8 DA |
2413 | && (EQ (XWINDOW (w)->contents, buf1) |
2414 | || EQ (XWINDOW (w)->contents, buf2))) | |
d3d50620 | 2415 | Fset_marker (XWINDOW (w)->pointm, |
3a45383a | 2416 | make_number |
e74aeda8 DA |
2417 | (BUF_BEGV (XBUFFER (XWINDOW (w)->contents))), |
2418 | XWINDOW (w)->contents); | |
c7f53895 | 2419 | if (MARKERP (XWINDOW (w)->start) |
e74aeda8 DA |
2420 | && (EQ (XWINDOW (w)->contents, buf1) |
2421 | || EQ (XWINDOW (w)->contents, buf2))) | |
c7f53895 DA |
2422 | Fset_marker (XWINDOW (w)->start, |
2423 | make_number | |
e74aeda8 DA |
2424 | (XBUFFER (XWINDOW (w)->contents)->last_window_start), |
2425 | XWINDOW (w)->contents); | |
126f1fc1 SM |
2426 | w = Fnext_window (w, Qt, Qt); |
2427 | } | |
2428 | } | |
2429 | ||
13cda5f9 SM |
2430 | if (current_buffer->text->intervals) |
2431 | (eassert (EQ (current_buffer->text->intervals->up.obj, buffer)), | |
2432 | XSETBUFFER (current_buffer->text->intervals->up.obj, current_buffer)); | |
2433 | if (other_buffer->text->intervals) | |
2434 | (eassert (EQ (other_buffer->text->intervals->up.obj, Fcurrent_buffer ())), | |
2435 | XSETBUFFER (other_buffer->text->intervals->up.obj, other_buffer)); | |
2436 | ||
2437 | return Qnil; | |
2438 | } | |
2439 | ||
a7ca3326 | 2440 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
3ac81adb | 2441 | 1, 1, 0, |
7ee72033 | 2442 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2443 | If FLAG is t, this makes the buffer a multibyte buffer. |
2444 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
8f924df7 KH |
2445 | In these cases, the buffer contents remain unchanged as a sequence of |
2446 | bytes but the contents viewed as characters do change. | |
2447 | If FLAG is `to', this makes the buffer a multibyte buffer by changing | |
6b61353c KH |
2448 | all eight-bit bytes to eight-bit characters. |
2449 | If the multibyte flag was really changed, undo information of the | |
2450 | current buffer is cleared. */) | |
5842a27b | 2451 | (Lisp_Object flag) |
3ac81adb | 2452 | { |
65745fad | 2453 | struct Lisp_Marker *tail, *markers; |
abc9d959 | 2454 | struct buffer *other; |
d311d28c | 2455 | ptrdiff_t begv, zv; |
37ef52bb PE |
2456 | bool narrowed = (BEG != BEGV || Z != ZV); |
2457 | bool modified_p = !NILP (Fbuffer_modified_p (Qnil)); | |
4b4deea2 | 2458 | Lisp_Object old_undo = BVAR (current_buffer, undo_list); |
38babc07 | 2459 | struct gcpro gcpro1; |
3ac81adb | 2460 | |
6e553d5e RS |
2461 | if (current_buffer->base_buffer) |
2462 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2463 | ||
70e77119 | 2464 | /* Do nothing if nothing actually changes. */ |
4b4deea2 | 2465 | if (NILP (flag) == NILP (BVAR (current_buffer, enable_multibyte_characters))) |
70e77119 AS |
2466 | return flag; |
2467 | ||
38babc07 KS |
2468 | GCPRO1 (old_undo); |
2469 | ||
2470 | /* Don't record these buffer changes. We will put a special undo entry | |
2471 | instead. */ | |
39eb03f1 | 2472 | bset_undo_list (current_buffer, Qt); |
b05525fa | 2473 | |
3ac81adb RS |
2474 | /* If the cached position is for this buffer, clear it out. */ |
2475 | clear_charpos_cache (current_buffer); | |
2476 | ||
458c8af4 KH |
2477 | if (NILP (flag)) |
2478 | begv = BEGV_BYTE, zv = ZV_BYTE; | |
2479 | else | |
2480 | begv = BEGV, zv = ZV; | |
2481 | ||
a9bcded1 | 2482 | if (narrowed) |
090cf9db | 2483 | error ("Changing multibyteness in a narrowed buffer"); |
a9bcded1 | 2484 | |
3ac81adb RS |
2485 | if (NILP (flag)) |
2486 | { | |
d311d28c | 2487 | ptrdiff_t pos, stop; |
a9bcded1 KH |
2488 | unsigned char *p; |
2489 | ||
3ac81adb RS |
2490 | /* Do this first, so it can use CHAR_TO_BYTE |
2491 | to calculate the old correspondences. */ | |
2492 | set_intervals_multibyte (0); | |
2493 | ||
39eb03f1 | 2494 | bset_enable_multibyte_characters (current_buffer, Qnil); |
3ac81adb RS |
2495 | |
2496 | Z = Z_BYTE; | |
2497 | BEGV = BEGV_BYTE; | |
2498 | ZV = ZV_BYTE; | |
2499 | GPT = GPT_BYTE; | |
2500 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2501 | ||
60ebfdf3 | 2502 | |
65745fad SM |
2503 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
2504 | tail->charpos = tail->bytepos; | |
a9bcded1 KH |
2505 | |
2506 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2507 | pos = BEG; | |
2508 | stop = GPT; | |
2509 | p = BEG_ADDR; | |
2510 | while (1) | |
2511 | { | |
2512 | int c, bytes; | |
2513 | ||
2514 | if (pos == stop) | |
2515 | { | |
2516 | if (pos == Z) | |
2517 | break; | |
2518 | p = GAP_END_ADDR; | |
2519 | stop = Z; | |
2520 | } | |
8f348ed5 KH |
2521 | if (ASCII_BYTE_P (*p)) |
2522 | p++, pos++; | |
2523 | else if (CHAR_BYTE8_HEAD_P (*p)) | |
a9bcded1 | 2524 | { |
62a6e103 | 2525 | c = STRING_CHAR_AND_LENGTH (p, bytes); |
a9bcded1 | 2526 | /* Delete all bytes for this 8-bit character but the |
3b59c351 | 2527 | last one, and change the last one to the character |
a9bcded1 KH |
2528 | code. */ |
2529 | bytes--; | |
2530 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2531 | p = GAP_END_ADDR; | |
2532 | *p++ = c; | |
2533 | pos++; | |
2534 | if (begv > pos) | |
2535 | begv -= bytes; | |
2536 | if (zv > pos) | |
2537 | zv -= bytes; | |
2538 | stop = Z; | |
2539 | } | |
8f924df7 | 2540 | else |
8f348ed5 KH |
2541 | { |
2542 | bytes = BYTES_BY_CHAR_HEAD (*p); | |
2543 | p += bytes, pos += bytes; | |
2544 | } | |
a9bcded1 KH |
2545 | } |
2546 | if (narrowed) | |
2547 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2548 | } |
2549 | else | |
2550 | { | |
d311d28c PE |
2551 | ptrdiff_t pt = PT; |
2552 | ptrdiff_t pos, stop; | |
8f348ed5 | 2553 | unsigned char *p, *pend; |
a9bcded1 | 2554 | |
673c57d2 | 2555 | /* Be sure not to have a multibyte sequence striding over the GAP. |
8f348ed5 KH |
2556 | Ex: We change this: "...abc\302 _GAP_ \241def..." |
2557 | to: "...abc _GAP_ \302\241def..." */ | |
673c57d2 | 2558 | |
8f924df7 | 2559 | if (EQ (flag, Qt) |
a3a303df | 2560 | && GPT_BYTE > 1 && GPT_BYTE < Z_BYTE |
673c57d2 KH |
2561 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) |
2562 | { | |
8f54f30a | 2563 | unsigned char *q = GPT_ADDR - 1; |
673c57d2 | 2564 | |
8f54f30a PE |
2565 | while (! CHAR_HEAD_P (*q) && q > BEG_ADDR) q--; |
2566 | if (LEADING_CODE_P (*q)) | |
673c57d2 | 2567 | { |
d311d28c | 2568 | ptrdiff_t new_gpt = GPT_BYTE - (GPT_ADDR - q); |
673c57d2 KH |
2569 | |
2570 | move_gap_both (new_gpt, new_gpt); | |
2571 | } | |
2572 | } | |
2573 | ||
a9bcded1 KH |
2574 | /* Make the buffer contents valid as multibyte by converting |
2575 | 8-bit characters to multibyte form. */ | |
2576 | pos = BEG; | |
2577 | stop = GPT; | |
2578 | p = BEG_ADDR; | |
8f348ed5 | 2579 | pend = GPT_ADDR; |
a9bcded1 KH |
2580 | while (1) |
2581 | { | |
2582 | int bytes; | |
2583 | ||
2584 | if (pos == stop) | |
2585 | { | |
2586 | if (pos == Z) | |
2587 | break; | |
2588 | p = GAP_END_ADDR; | |
8f348ed5 | 2589 | pend = Z_ADDR; |
a9bcded1 KH |
2590 | stop = Z; |
2591 | } | |
177c0ea7 | 2592 | |
a3a303df KH |
2593 | if (ASCII_BYTE_P (*p)) |
2594 | p++, pos++; | |
dcfb9bc4 KH |
2595 | else if (EQ (flag, Qt) |
2596 | && ! CHAR_BYTE8_HEAD_P (*p) | |
2597 | && (bytes = MULTIBYTE_LENGTH (p, pend)) > 0) | |
a9bcded1 KH |
2598 | p += bytes, pos += bytes; |
2599 | else | |
2600 | { | |
2601 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
a3a303df | 2602 | int c; |
a9bcded1 | 2603 | |
8f924df7 | 2604 | c = BYTE8_TO_CHAR (*p); |
8c2fc311 | 2605 | bytes = CHAR_STRING (c, tmp); |
a9bcded1 KH |
2606 | *p = tmp[0]; |
2607 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2608 | bytes--; | |
b68864e5 | 2609 | insert_1_both ((char *) tmp + 1, bytes, bytes, 1, 0, 0); |
a9bcded1 KH |
2610 | /* Now the gap is after the just inserted data. */ |
2611 | pos = GPT; | |
2612 | p = GAP_END_ADDR; | |
2613 | if (pos <= begv) | |
2614 | begv += bytes; | |
2615 | if (pos <= zv) | |
2616 | zv += bytes; | |
2617 | if (pos <= pt) | |
2618 | pt += bytes; | |
31285a8f | 2619 | pend = Z_ADDR; |
a9bcded1 KH |
2620 | stop = Z; |
2621 | } | |
2622 | } | |
2623 | ||
2624 | if (pt != PT) | |
2625 | TEMP_SET_PT (pt); | |
2626 | ||
2627 | if (narrowed) | |
2628 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2629 | ||
3ac81adb RS |
2630 | /* Do this first, so that chars_in_text asks the right question. |
2631 | set_intervals_multibyte needs it too. */ | |
39eb03f1 | 2632 | bset_enable_multibyte_characters (current_buffer, Qt); |
3ac81adb | 2633 | |
b05525fa | 2634 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2635 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2636 | |
673c57d2 | 2637 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2638 | |
2639 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2640 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2641 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2642 | else |
2643 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2644 | |
2645 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2646 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2647 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2648 | else |
2649 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2650 | |
2651 | { | |
d311d28c PE |
2652 | ptrdiff_t byte = advance_to_char_boundary (PT_BYTE); |
2653 | ptrdiff_t position; | |
b05525fa | 2654 | |
8f54f30a PE |
2655 | if (byte > GPT_BYTE) |
2656 | position = chars_in_text (GAP_END_ADDR, byte - GPT_BYTE) + GPT; | |
b05525fa | 2657 | else |
8f54f30a PE |
2658 | position = chars_in_text (BEG_ADDR, byte - BEG_BYTE) + BEG; |
2659 | TEMP_SET_PT_BOTH (position, byte); | |
b05525fa | 2660 | } |
3ac81adb RS |
2661 | |
2662 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2663 | |
2664 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2665 | getting confused by the markers that have not yet been updated. | |
2666 | It is also a signal that it should never create a marker. */ | |
65745fad | 2667 | BUF_MARKERS (current_buffer) = NULL; |
3ac81adb | 2668 | |
65745fad | 2669 | for (; tail; tail = tail->next) |
3ac81adb | 2670 | { |
65745fad SM |
2671 | tail->bytepos = advance_to_char_boundary (tail->bytepos); |
2672 | tail->charpos = BYTE_TO_CHAR (tail->bytepos); | |
3ac81adb | 2673 | } |
b69f9797 RS |
2674 | |
2675 | /* Make sure no markers were put on the chain | |
2676 | while the chain value was incorrect. */ | |
65745fad | 2677 | if (BUF_MARKERS (current_buffer)) |
1088b922 | 2678 | emacs_abort (); |
b69f9797 | 2679 | |
3ac81adb RS |
2680 | BUF_MARKERS (current_buffer) = markers; |
2681 | ||
2682 | /* Do this last, so it can calculate the new correspondences | |
2683 | between chars and bytes. */ | |
2684 | set_intervals_multibyte (1); | |
2685 | } | |
2686 | ||
38babc07 KS |
2687 | if (!EQ (old_undo, Qt)) |
2688 | { | |
2689 | /* Represent all the above changes by a special undo entry. */ | |
39eb03f1 PE |
2690 | bset_undo_list (current_buffer, |
2691 | Fcons (list3 (Qapply, | |
2692 | intern ("set-buffer-multibyte"), | |
2693 | NILP (flag) ? Qt : Qnil), | |
2694 | old_undo)); | |
38babc07 KS |
2695 | } |
2696 | ||
2697 | UNGCPRO; | |
a9bcded1 | 2698 | |
724b203f | 2699 | current_buffer->prevent_redisplay_optimizations_p = 1; |
c6afe371 DA |
2700 | |
2701 | /* If buffer is shown in a window, let redisplay consider other windows. */ | |
2702 | if (buffer_window_count (current_buffer)) | |
94ae2ad4 | 2703 | windows_or_buffers_changed = 10; |
724b203f | 2704 | |
abc9d959 RS |
2705 | /* Copy this buffer's new multibyte status |
2706 | into all of its indirect buffers. */ | |
52b852c7 | 2707 | FOR_EACH_BUFFER (other) |
e578f381 | 2708 | if (other->base_buffer == current_buffer && BUFFER_LIVE_P (other)) |
724b203f | 2709 | { |
4b4deea2 TT |
2710 | BVAR (other, enable_multibyte_characters) |
2711 | = BVAR (current_buffer, enable_multibyte_characters); | |
724b203f GM |
2712 | other->prevent_redisplay_optimizations_p = 1; |
2713 | } | |
abc9d959 | 2714 | |
ed00559d KH |
2715 | /* Restore the modifiedness of the buffer. */ |
2716 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2717 | Fset_buffer_modified_p (Qnil); | |
2718 | ||
172f9454 KH |
2719 | /* Update coding systems of this buffer's process (if any). */ |
2720 | { | |
2721 | Lisp_Object process; | |
2722 | ||
2723 | process = Fget_buffer_process (Fcurrent_buffer ()); | |
2724 | if (PROCESSP (process)) | |
2725 | setup_process_coding_systems (process); | |
2726 | } | |
2727 | ||
3ac81adb RS |
2728 | return flag; |
2729 | } | |
2730 | \f | |
a7ca3326 | 2731 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, |
16a97296 | 2732 | Skill_all_local_variables, 0, 0, 0, |
7ee72033 | 2733 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2734 | Most local variable bindings are eliminated so that the default values |
2735 | become effective once more. Also, the syntax table is set from | |
2736 | `standard-syntax-table', the local keymap is set to nil, | |
2737 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2738 | This function also forces redisplay of the mode line. | |
2739 | ||
2740 | Every function to select a new major mode starts by | |
2741 | calling this function. | |
2742 | ||
2743 | As a special exception, local variables whose names have | |
2744 | a non-nil `permanent-local' property are not eliminated by this function. | |
2745 | ||
2746 | The first thing this function does is run | |
7ee72033 | 2747 | the normal hook `change-major-mode-hook'. */) |
5842a27b | 2748 | (void) |
1ab256cb | 2749 | { |
dee091a3 | 2750 | Frun_hooks (1, &Qchange_major_mode_hook); |
1ab256cb | 2751 | |
3709505e | 2752 | /* Make sure none of the bindings in local_var_alist |
2f3f993b | 2753 | remain swapped in, in their symbols. */ |
1ab256cb | 2754 | |
2f3f993b | 2755 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2756 | |
2757 | /* Actually eliminate all local bindings of this buffer. */ | |
2758 | ||
13de9290 | 2759 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2760 | |
1ab256cb RM |
2761 | /* Force mode-line redisplay. Useful here because all major mode |
2762 | commands call this function. */ | |
2ec9db5d | 2763 | update_mode_lines = 12; |
1ab256cb RM |
2764 | |
2765 | return Qnil; | |
2766 | } | |
2f3f993b RS |
2767 | |
2768 | /* Make sure no local variables remain set up with buffer B | |
2769 | for their current values. */ | |
2770 | ||
2771 | static void | |
d3da34e0 | 2772 | swap_out_buffer_local_variables (struct buffer *b) |
2f3f993b | 2773 | { |
ce5b453a | 2774 | Lisp_Object oalist, alist, buffer; |
2f3f993b RS |
2775 | |
2776 | XSETBUFFER (buffer, b); | |
4b4deea2 | 2777 | oalist = BVAR (b, local_var_alist); |
2f3f993b | 2778 | |
67ee9f6e | 2779 | for (alist = oalist; CONSP (alist); alist = XCDR (alist)) |
2f3f993b | 2780 | { |
ce5b453a SM |
2781 | Lisp_Object sym = XCAR (XCAR (alist)); |
2782 | eassert (XSYMBOL (sym)->redirect == SYMBOL_LOCALIZED); | |
2783 | /* Need not do anything if some other buffer's binding is | |
e4769531 | 2784 | now cached. */ |
ce5b453a | 2785 | if (EQ (SYMBOL_BLV (XSYMBOL (sym))->where, buffer)) |
2f3f993b | 2786 | { |
e7c10f83 SM |
2787 | /* Symbol is set up for this buffer's old local value: |
2788 | swap it out! */ | |
ce5b453a | 2789 | swap_in_global_binding (XSYMBOL (sym)); |
2f3f993b RS |
2790 | } |
2791 | } | |
2792 | } | |
1ab256cb | 2793 | \f |
2eec3b4e | 2794 | /* Find all the overlays in the current buffer that contain position POS. |
177c0ea7 | 2795 | Return the number found, and store them in a vector in *VEC_PTR. |
2eec3b4e | 2796 | Store in *LEN_PTR the size allocated for the vector. |
52f8ec73 | 2797 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
624d2678 | 2798 | or ZV if there are no more overlays between POS and ZV. |
bbbe9545 | 2799 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 | 2800 | or where an overlay starts which ends at or after POS; |
624d2678 | 2801 | or BEGV if there are no such overlays from BEGV to POS. |
239c932b | 2802 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2803 | |
2804 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2805 | when this function is called. |
2806 | ||
37ef52bb PE |
2807 | If EXTEND, make the vector bigger if necessary. |
2808 | If not, never extend the vector, | |
2809 | and store only as many overlays as will fit. | |
2810 | But still return the total number of overlays. | |
ac869cf7 | 2811 | |
37ef52bb | 2812 | If CHANGE_REQ, any position written into *PREV_PTR or |
ac869cf7 MB |
2813 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the |
2814 | default (BEGV or ZV). */ | |
2eec3b4e | 2815 | |
b081724f | 2816 | ptrdiff_t |
37ef52bb | 2817 | overlays_at (EMACS_INT pos, bool extend, Lisp_Object **vec_ptr, |
b081724f | 2818 | ptrdiff_t *len_ptr, |
37ef52bb | 2819 | ptrdiff_t *next_ptr, ptrdiff_t *prev_ptr, bool change_req) |
1ab256cb | 2820 | { |
2410d73a SM |
2821 | Lisp_Object overlay, start, end; |
2822 | struct Lisp_Overlay *tail; | |
b081724f PE |
2823 | ptrdiff_t idx = 0; |
2824 | ptrdiff_t len = *len_ptr; | |
2eec3b4e | 2825 | Lisp_Object *vec = *vec_ptr; |
d311d28c PE |
2826 | ptrdiff_t next = ZV; |
2827 | ptrdiff_t prev = BEGV; | |
37ef52bb | 2828 | bool inhibit_storing = 0; |
61d54cd5 | 2829 | |
fd318b54 | 2830 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
2eec3b4e | 2831 | { |
d311d28c | 2832 | ptrdiff_t startpos, endpos; |
52f8ec73 | 2833 | |
2410d73a | 2834 | XSETMISC (overlay, tail); |
1ab256cb | 2835 | |
2eec3b4e RS |
2836 | start = OVERLAY_START (overlay); |
2837 | end = OVERLAY_END (overlay); | |
239c932b RS |
2838 | endpos = OVERLAY_POSITION (end); |
2839 | if (endpos < pos) | |
2840 | { | |
2841 | if (prev < endpos) | |
2842 | prev = endpos; | |
2843 | break; | |
2844 | } | |
413e06a4 RS |
2845 | startpos = OVERLAY_POSITION (start); |
2846 | /* This one ends at or after POS | |
daa1c109 | 2847 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2848 | if (prev < startpos && startpos < pos) |
2849 | prev = startpos; | |
239c932b RS |
2850 | if (endpos == pos) |
2851 | continue; | |
2eec3b4e RS |
2852 | if (startpos <= pos) |
2853 | { | |
2854 | if (idx == len) | |
2855 | { | |
61d54cd5 RS |
2856 | /* The supplied vector is full. |
2857 | Either make it bigger, or don't store any more in it. */ | |
2858 | if (extend) | |
2859 | { | |
0065d054 PE |
2860 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2861 | sizeof *vec); | |
61d54cd5 | 2862 | *vec_ptr = vec; |
0065d054 | 2863 | len = *len_ptr; |
61d54cd5 RS |
2864 | } |
2865 | else | |
2866 | inhibit_storing = 1; | |
2eec3b4e | 2867 | } |
61d54cd5 RS |
2868 | |
2869 | if (!inhibit_storing) | |
2870 | vec[idx] = overlay; | |
2871 | /* Keep counting overlays even if we can't return them all. */ | |
2872 | idx++; | |
2eec3b4e RS |
2873 | } |
2874 | else if (startpos < next) | |
2875 | next = startpos; | |
2876 | } | |
2877 | ||
fd318b54 | 2878 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
1ab256cb | 2879 | { |
d311d28c | 2880 | ptrdiff_t startpos, endpos; |
52f8ec73 | 2881 | |
2410d73a | 2882 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2883 | |
2884 | start = OVERLAY_START (overlay); | |
2885 | end = OVERLAY_END (overlay); | |
2886 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2887 | if (pos < startpos) |
2eec3b4e RS |
2888 | { |
2889 | if (startpos < next) | |
2890 | next = startpos; | |
2891 | break; | |
2892 | } | |
239c932b RS |
2893 | endpos = OVERLAY_POSITION (end); |
2894 | if (pos < endpos) | |
2eec3b4e RS |
2895 | { |
2896 | if (idx == len) | |
2897 | { | |
61d54cd5 RS |
2898 | if (extend) |
2899 | { | |
0065d054 PE |
2900 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2901 | sizeof *vec); | |
61d54cd5 | 2902 | *vec_ptr = vec; |
0065d054 | 2903 | len = *len_ptr; |
61d54cd5 RS |
2904 | } |
2905 | else | |
2906 | inhibit_storing = 1; | |
2eec3b4e | 2907 | } |
61d54cd5 RS |
2908 | |
2909 | if (!inhibit_storing) | |
2910 | vec[idx] = overlay; | |
2911 | idx++; | |
413e06a4 RS |
2912 | |
2913 | if (startpos < pos && startpos > prev) | |
2914 | prev = startpos; | |
2eec3b4e | 2915 | } |
239c932b RS |
2916 | else if (endpos < pos && endpos > prev) |
2917 | prev = endpos; | |
1d5f4c1d MB |
2918 | else if (endpos == pos && startpos > prev |
2919 | && (!change_req || startpos < pos)) | |
413e06a4 | 2920 | prev = startpos; |
1ab256cb RM |
2921 | } |
2922 | ||
239c932b RS |
2923 | if (next_ptr) |
2924 | *next_ptr = next; | |
2925 | if (prev_ptr) | |
2926 | *prev_ptr = prev; | |
2eec3b4e RS |
2927 | return idx; |
2928 | } | |
74514898 | 2929 | \f |
7723e095 MR |
2930 | /* Find all the overlays in the current buffer that overlap the range |
2931 | BEG-END, or are empty at BEG, or are empty at END provided END | |
2932 | denotes the position at the end of the current buffer. | |
2a3eeee7 | 2933 | |
177c0ea7 | 2934 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2935 | Store in *LEN_PTR the size allocated for the vector. |
2936 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2937 | or ZV if there are no more overlays. | |
2938 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2939 | or BEGV if there are no previous overlays. | |
2940 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2941 | ||
2942 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2943 | when this function is called. | |
2944 | ||
37ef52bb PE |
2945 | If EXTEND, make the vector bigger if necessary. |
2946 | If not, never extend the vector, | |
2947 | and store only as many overlays as will fit. | |
2948 | But still return the total number of overlays. */ | |
74514898 | 2949 | |
21514da7 | 2950 | static ptrdiff_t |
37ef52bb | 2951 | overlays_in (EMACS_INT beg, EMACS_INT end, bool extend, |
21514da7 | 2952 | Lisp_Object **vec_ptr, ptrdiff_t *len_ptr, |
d311d28c | 2953 | ptrdiff_t *next_ptr, ptrdiff_t *prev_ptr) |
74514898 | 2954 | { |
2410d73a SM |
2955 | Lisp_Object overlay, ostart, oend; |
2956 | struct Lisp_Overlay *tail; | |
21514da7 PE |
2957 | ptrdiff_t idx = 0; |
2958 | ptrdiff_t len = *len_ptr; | |
74514898 | 2959 | Lisp_Object *vec = *vec_ptr; |
d311d28c PE |
2960 | ptrdiff_t next = ZV; |
2961 | ptrdiff_t prev = BEGV; | |
37ef52bb PE |
2962 | bool inhibit_storing = 0; |
2963 | bool end_is_Z = end == Z; | |
74514898 | 2964 | |
fd318b54 | 2965 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
74514898 | 2966 | { |
d311d28c | 2967 | ptrdiff_t startpos, endpos; |
74514898 | 2968 | |
2410d73a | 2969 | XSETMISC (overlay, tail); |
74514898 RS |
2970 | |
2971 | ostart = OVERLAY_START (overlay); | |
2972 | oend = OVERLAY_END (overlay); | |
2973 | endpos = OVERLAY_POSITION (oend); | |
2974 | if (endpos < beg) | |
2975 | { | |
2976 | if (prev < endpos) | |
2977 | prev = endpos; | |
2978 | break; | |
2979 | } | |
2980 | startpos = OVERLAY_POSITION (ostart); | |
7723e095 MR |
2981 | /* Count an interval if it overlaps the range, is empty at the |
2982 | start of the range, or is empty at END provided END denotes the | |
2983 | end of the buffer. */ | |
74514898 | 2984 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2985 | || (startpos == endpos |
2986 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2987 | { |
2988 | if (idx == len) | |
2989 | { | |
2990 | /* The supplied vector is full. | |
2991 | Either make it bigger, or don't store any more in it. */ | |
2992 | if (extend) | |
2993 | { | |
0065d054 PE |
2994 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2995 | sizeof *vec); | |
74514898 | 2996 | *vec_ptr = vec; |
0065d054 | 2997 | len = *len_ptr; |
74514898 RS |
2998 | } |
2999 | else | |
3000 | inhibit_storing = 1; | |
3001 | } | |
3002 | ||
3003 | if (!inhibit_storing) | |
3004 | vec[idx] = overlay; | |
3005 | /* Keep counting overlays even if we can't return them all. */ | |
3006 | idx++; | |
3007 | } | |
3008 | else if (startpos < next) | |
3009 | next = startpos; | |
3010 | } | |
3011 | ||
fd318b54 | 3012 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
74514898 | 3013 | { |
d311d28c | 3014 | ptrdiff_t startpos, endpos; |
74514898 | 3015 | |
2410d73a | 3016 | XSETMISC (overlay, tail); |
74514898 RS |
3017 | |
3018 | ostart = OVERLAY_START (overlay); | |
3019 | oend = OVERLAY_END (overlay); | |
3020 | startpos = OVERLAY_POSITION (ostart); | |
3021 | if (end < startpos) | |
3022 | { | |
3023 | if (startpos < next) | |
3024 | next = startpos; | |
3025 | break; | |
3026 | } | |
3027 | endpos = OVERLAY_POSITION (oend); | |
7723e095 MR |
3028 | /* Count an interval if it overlaps the range, is empty at the |
3029 | start of the range, or is empty at END provided END denotes the | |
3030 | end of the buffer. */ | |
74514898 | 3031 | if ((beg < endpos && startpos < end) |
7723e095 MR |
3032 | || (startpos == endpos |
3033 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
3034 | { |
3035 | if (idx == len) | |
3036 | { | |
3037 | if (extend) | |
3038 | { | |
0065d054 PE |
3039 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
3040 | sizeof *vec); | |
74514898 | 3041 | *vec_ptr = vec; |
0065d054 | 3042 | len = *len_ptr; |
74514898 RS |
3043 | } |
3044 | else | |
3045 | inhibit_storing = 1; | |
3046 | } | |
3047 | ||
3048 | if (!inhibit_storing) | |
3049 | vec[idx] = overlay; | |
3050 | idx++; | |
3051 | } | |
3052 | else if (endpos < beg && endpos > prev) | |
3053 | prev = endpos; | |
3054 | } | |
fc04fa47 | 3055 | |
74514898 RS |
3056 | if (next_ptr) |
3057 | *next_ptr = next; | |
3058 | if (prev_ptr) | |
3059 | *prev_ptr = prev; | |
3060 | return idx; | |
3061 | } | |
09a22085 GM |
3062 | |
3063 | ||
37ef52bb | 3064 | /* Return true if there exists an overlay with a non-nil |
09a22085 GM |
3065 | `mouse-face' property overlapping OVERLAY. */ |
3066 | ||
37ef52bb | 3067 | bool |
d3da34e0 | 3068 | mouse_face_overlay_overlaps (Lisp_Object overlay) |
09a22085 | 3069 | { |
d311d28c PE |
3070 | ptrdiff_t start = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3071 | ptrdiff_t end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
21514da7 | 3072 | ptrdiff_t n, i, size; |
09a22085 | 3073 | Lisp_Object *v, tem; |
177c0ea7 | 3074 | |
bfd8410f | 3075 | size = 10; |
38182d90 | 3076 | v = alloca (size * sizeof *v); |
bfd8410f GM |
3077 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); |
3078 | if (n > size) | |
09a22085 | 3079 | { |
38182d90 | 3080 | v = alloca (n * sizeof *v); |
09a22085 GM |
3081 | overlays_in (start, end, 0, &v, &n, NULL, NULL); |
3082 | } | |
3083 | ||
3084 | for (i = 0; i < n; ++i) | |
3085 | if (!EQ (v[i], overlay) | |
3086 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
3087 | !NILP (tem))) | |
3088 | break; | |
3089 | ||
3090 | return i < n; | |
3091 | } | |
3092 | ||
3093 | ||
74514898 | 3094 | \f |
fc04fa47 | 3095 | /* Fast function to just test if we're at an overlay boundary. */ |
37ef52bb | 3096 | bool |
d311d28c | 3097 | overlay_touches_p (ptrdiff_t pos) |
fc04fa47 | 3098 | { |
2410d73a SM |
3099 | Lisp_Object overlay; |
3100 | struct Lisp_Overlay *tail; | |
fc04fa47 | 3101 | |
fd318b54 | 3102 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
fc04fa47 | 3103 | { |
d311d28c | 3104 | ptrdiff_t endpos; |
fc04fa47 | 3105 | |
2410d73a | 3106 | XSETMISC (overlay ,tail); |
22657b40 | 3107 | eassert (OVERLAYP (overlay)); |
fc04fa47 KH |
3108 | |
3109 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3110 | if (endpos < pos) | |
3111 | break; | |
3112 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
3113 | return 1; | |
3114 | } | |
3115 | ||
fd318b54 | 3116 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
fc04fa47 | 3117 | { |
d311d28c | 3118 | ptrdiff_t startpos; |
fc04fa47 | 3119 | |
2410d73a | 3120 | XSETMISC (overlay, tail); |
22657b40 | 3121 | eassert (OVERLAYP (overlay)); |
fc04fa47 KH |
3122 | |
3123 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3124 | if (pos < startpos) | |
3125 | break; | |
3126 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
3127 | return 1; | |
3128 | } | |
3129 | return 0; | |
3130 | } | |
2eec3b4e | 3131 | \f |
5985d248 KH |
3132 | struct sortvec |
3133 | { | |
3134 | Lisp_Object overlay; | |
d311d28c | 3135 | ptrdiff_t beg, end; |
fadf4e30 | 3136 | EMACS_INT priority; |
5985d248 KH |
3137 | }; |
3138 | ||
3139 | static int | |
d3da34e0 | 3140 | compare_overlays (const void *v1, const void *v2) |
5985d248 | 3141 | { |
7d652d97 PE |
3142 | const struct sortvec *s1 = v1; |
3143 | const struct sortvec *s2 = v2; | |
5985d248 | 3144 | if (s1->priority != s2->priority) |
c20998a7 | 3145 | return s1->priority < s2->priority ? -1 : 1; |
5985d248 | 3146 | if (s1->beg != s2->beg) |
c20998a7 | 3147 | return s1->beg < s2->beg ? -1 : 1; |
5985d248 | 3148 | if (s1->end != s2->end) |
c20998a7 | 3149 | return s2->end < s1->end ? -1 : 1; |
cae07000 SM |
3150 | /* Avoid the non-determinism of qsort by choosing an arbitrary ordering |
3151 | between "equal" overlays. The result can still change between | |
3152 | invocations of Emacs, but it won't change in the middle of | |
3153 | `find_field' (bug#6830). */ | |
61ddb1b9 SM |
3154 | if (!EQ (s1->overlay, s2->overlay)) |
3155 | return XLI (s1->overlay) < XLI (s2->overlay) ? -1 : 1; | |
5985d248 KH |
3156 | return 0; |
3157 | } | |
3158 | ||
3159 | /* Sort an array of overlays by priority. The array is modified in place. | |
3160 | The return value is the new size; this may be smaller than the original | |
3161 | size if some of the overlays were invalid or were window-specific. */ | |
b081724f PE |
3162 | ptrdiff_t |
3163 | sort_overlays (Lisp_Object *overlay_vec, ptrdiff_t noverlays, struct window *w) | |
5985d248 | 3164 | { |
b081724f | 3165 | ptrdiff_t i, j; |
59ac2d13 EZ |
3166 | USE_SAFE_ALLOCA; |
3167 | struct sortvec *sortvec; | |
3168 | ||
3169 | SAFE_NALLOCA (sortvec, 1, noverlays); | |
5985d248 KH |
3170 | |
3171 | /* Put the valid and relevant overlays into sortvec. */ | |
3172 | ||
3173 | for (i = 0, j = 0; i < noverlays; i++) | |
3174 | { | |
0fa767e7 | 3175 | Lisp_Object tem; |
c99fc30f | 3176 | Lisp_Object overlay; |
5985d248 | 3177 | |
c99fc30f | 3178 | overlay = overlay_vec[i]; |
22657b40 | 3179 | if (OVERLAYP (overlay) |
5985d248 KH |
3180 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 |
3181 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
3182 | { | |
0fa767e7 KH |
3183 | /* If we're interested in a specific window, then ignore |
3184 | overlays that are limited to some other window. */ | |
3185 | if (w) | |
5985d248 | 3186 | { |
28545e04 | 3187 | Lisp_Object window; |
0fa767e7 KH |
3188 | |
3189 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3190 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 3191 | continue; |
5985d248 | 3192 | } |
0fa767e7 KH |
3193 | |
3194 | /* This overlay is good and counts: put it into sortvec. */ | |
3195 | sortvec[j].overlay = overlay; | |
3196 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3197 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3198 | tem = Foverlay_get (overlay, Qpriority); | |
3199 | if (INTEGERP (tem)) | |
3200 | sortvec[j].priority = XINT (tem); | |
3201 | else | |
3202 | sortvec[j].priority = 0; | |
3203 | j++; | |
5985d248 KH |
3204 | } |
3205 | } | |
3206 | noverlays = j; | |
3207 | ||
3208 | /* Sort the overlays into the proper order: increasing priority. */ | |
3209 | ||
3210 | if (noverlays > 1) | |
3211 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
3212 | ||
3213 | for (i = 0; i < noverlays; i++) | |
3214 | overlay_vec[i] = sortvec[i].overlay; | |
59ac2d13 EZ |
3215 | |
3216 | SAFE_FREE (); | |
5985d248 KH |
3217 | return (noverlays); |
3218 | } | |
3219 | \f | |
bbbe9545 KH |
3220 | struct sortstr |
3221 | { | |
cb26008f | 3222 | Lisp_Object string, string2; |
93cb6be3 | 3223 | ptrdiff_t size; |
8961a454 | 3224 | EMACS_INT priority; |
bbbe9545 KH |
3225 | }; |
3226 | ||
e8185fa8 KH |
3227 | struct sortstrlist |
3228 | { | |
3229 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
67c36fce PE |
3230 | ptrdiff_t size; /* Allocated length of that array. */ |
3231 | ptrdiff_t used; /* How much of the array is currently in use. */ | |
0065d054 | 3232 | ptrdiff_t bytes; /* Total length of the strings in buf. */ |
e8185fa8 KH |
3233 | }; |
3234 | ||
3235 | /* Buffers for storing information about the overlays touching a given | |
3236 | position. These could be automatic variables in overlay_strings, but | |
3237 | it's more efficient to hold onto the memory instead of repeatedly | |
3238 | allocating and freeing it. */ | |
3239 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 3240 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
3241 | |
3242 | /* Allocated length of overlay_str_buf. */ | |
fe5c5d37 | 3243 | static ptrdiff_t overlay_str_len; |
e8185fa8 | 3244 | |
bbbe9545 KH |
3245 | /* A comparison function suitable for passing to qsort. */ |
3246 | static int | |
d3da34e0 | 3247 | cmp_for_strings (const void *as1, const void *as2) |
bbbe9545 | 3248 | { |
7d652d97 PE |
3249 | struct sortstr const *s1 = as1; |
3250 | struct sortstr const *s2 = as2; | |
bbbe9545 | 3251 | if (s1->size != s2->size) |
c20998a7 | 3252 | return s2->size < s1->size ? -1 : 1; |
bbbe9545 | 3253 | if (s1->priority != s2->priority) |
c20998a7 | 3254 | return s1->priority < s2->priority ? -1 : 1; |
bbbe9545 KH |
3255 | return 0; |
3256 | } | |
3257 | ||
e8185fa8 | 3258 | static void |
93cb6be3 PE |
3259 | record_overlay_string (struct sortstrlist *ssl, Lisp_Object str, |
3260 | Lisp_Object str2, Lisp_Object pri, ptrdiff_t size) | |
e8185fa8 | 3261 | { |
d311d28c | 3262 | ptrdiff_t nbytes; |
43d27a72 | 3263 | |
e8185fa8 | 3264 | if (ssl->used == ssl->size) |
0065d054 | 3265 | ssl->buf = xpalloc (ssl->buf, &ssl->size, 5, -1, sizeof *ssl->buf); |
e8185fa8 | 3266 | ssl->buf[ssl->used].string = str; |
cb26008f | 3267 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
3268 | ssl->buf[ssl->used].size = size; |
3269 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
3270 | ssl->used++; | |
43d27a72 | 3271 | |
4b4deea2 | 3272 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 3273 | nbytes = SCHARS (str); |
43d27a72 | 3274 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
3275 | nbytes = count_size_as_multibyte (SDATA (str), |
3276 | SBYTES (str)); | |
43d27a72 | 3277 | else |
d5db4077 | 3278 | nbytes = SBYTES (str); |
43d27a72 | 3279 | |
0065d054 PE |
3280 | if (INT_ADD_OVERFLOW (ssl->bytes, nbytes)) |
3281 | memory_full (SIZE_MAX); | |
43d27a72 RS |
3282 | ssl->bytes += nbytes; |
3283 | ||
cb26008f | 3284 | if (STRINGP (str2)) |
43d27a72 | 3285 | { |
4b4deea2 | 3286 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 3287 | nbytes = SCHARS (str2); |
43d27a72 | 3288 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
3289 | nbytes = count_size_as_multibyte (SDATA (str2), |
3290 | SBYTES (str2)); | |
43d27a72 | 3291 | else |
d5db4077 | 3292 | nbytes = SBYTES (str2); |
43d27a72 | 3293 | |
0065d054 PE |
3294 | if (INT_ADD_OVERFLOW (ssl->bytes, nbytes)) |
3295 | memory_full (SIZE_MAX); | |
43d27a72 RS |
3296 | ssl->bytes += nbytes; |
3297 | } | |
e8185fa8 | 3298 | } |
bbbe9545 KH |
3299 | |
3300 | /* Return the concatenation of the strings associated with overlays that | |
3301 | begin or end at POS, ignoring overlays that are specific to a window | |
3302 | other than W. The strings are concatenated in the appropriate order: | |
3303 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
3304 | lower. Normally all of the after-strings come first, but zero-sized |
3305 | overlays have their after-strings ride along with the before-strings | |
3306 | because it would look strange to print them inside-out. | |
3307 | ||
3308 | Returns the string length, and stores the contents indirectly through | |
3309 | PSTR, if that variable is non-null. The string may be overwritten by | |
3310 | subsequent calls. */ | |
6b5d3b89 | 3311 | |
d311d28c PE |
3312 | ptrdiff_t |
3313 | overlay_strings (ptrdiff_t pos, struct window *w, unsigned char **pstr) | |
bbbe9545 | 3314 | { |
28545e04 | 3315 | Lisp_Object overlay, window, str; |
2410d73a | 3316 | struct Lisp_Overlay *ov; |
d311d28c | 3317 | ptrdiff_t startpos, endpos; |
37ef52bb | 3318 | bool multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
bbbe9545 | 3319 | |
e8185fa8 KH |
3320 | overlay_heads.used = overlay_heads.bytes = 0; |
3321 | overlay_tails.used = overlay_tails.bytes = 0; | |
fd318b54 | 3322 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
bbbe9545 | 3323 | { |
2410d73a | 3324 | XSETMISC (overlay, ov); |
c2d5b10f | 3325 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3326 | |
3327 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3328 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3329 | if (endpos < pos) | |
3330 | break; | |
3331 | if (endpos != pos && startpos != pos) | |
3332 | continue; | |
3333 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3334 | if (WINDOWP (window) && XWINDOW (window) != w) |
bbbe9545 | 3335 | continue; |
e8185fa8 KH |
3336 | if (startpos == pos |
3337 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3338 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3339 | (startpos == endpos |
3340 | ? Foverlay_get (overlay, Qafter_string) | |
3341 | : Qnil), | |
3342 | Foverlay_get (overlay, Qpriority), | |
3343 | endpos - startpos); | |
3344 | else if (endpos == pos | |
3345 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3346 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3347 | Foverlay_get (overlay, Qpriority), |
3348 | endpos - startpos); | |
bbbe9545 | 3349 | } |
fd318b54 | 3350 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
bbbe9545 | 3351 | { |
2410d73a SM |
3352 | XSETMISC (overlay, ov); |
3353 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3354 | |
3355 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3356 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3357 | if (startpos > pos) | |
3358 | break; | |
e8185fa8 KH |
3359 | if (endpos != pos && startpos != pos) |
3360 | continue; | |
3361 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3362 | if (WINDOWP (window) && XWINDOW (window) != w) |
e8185fa8 | 3363 | continue; |
e8185fa8 KH |
3364 | if (startpos == pos |
3365 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3366 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3367 | (startpos == endpos |
3368 | ? Foverlay_get (overlay, Qafter_string) | |
3369 | : Qnil), | |
3370 | Foverlay_get (overlay, Qpriority), | |
3371 | endpos - startpos); | |
3372 | else if (endpos == pos | |
3373 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3374 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3375 | Foverlay_get (overlay, Qpriority), |
3376 | endpos - startpos); | |
bbbe9545 | 3377 | } |
e8185fa8 KH |
3378 | if (overlay_tails.used > 1) |
3379 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3380 | cmp_for_strings); | |
3381 | if (overlay_heads.used > 1) | |
3382 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3383 | cmp_for_strings); | |
3384 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3385 | { |
e8185fa8 | 3386 | Lisp_Object tem; |
d311d28c | 3387 | ptrdiff_t i; |
9f4d7cde | 3388 | unsigned char *p; |
0065d054 | 3389 | ptrdiff_t total; |
bbbe9545 | 3390 | |
0065d054 PE |
3391 | if (INT_ADD_OVERFLOW (overlay_heads.bytes, overlay_tails.bytes)) |
3392 | memory_full (SIZE_MAX); | |
3393 | total = overlay_heads.bytes + overlay_tails.bytes; | |
bbbe9545 | 3394 | if (total > overlay_str_len) |
0065d054 PE |
3395 | overlay_str_buf = xpalloc (overlay_str_buf, &overlay_str_len, |
3396 | total - overlay_str_len, -1, 1); | |
3397 | ||
bbbe9545 | 3398 | p = overlay_str_buf; |
e8185fa8 | 3399 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3400 | { |
d311d28c | 3401 | ptrdiff_t nbytes; |
e8185fa8 | 3402 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3403 | nbytes = copy_text (SDATA (tem), p, |
3404 | SBYTES (tem), | |
43d27a72 RS |
3405 | STRING_MULTIBYTE (tem), multibyte); |
3406 | p += nbytes; | |
bbbe9545 | 3407 | } |
e8185fa8 | 3408 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3409 | { |
d311d28c | 3410 | ptrdiff_t nbytes; |
e8185fa8 | 3411 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3412 | nbytes = copy_text (SDATA (tem), p, |
3413 | SBYTES (tem), | |
43d27a72 RS |
3414 | STRING_MULTIBYTE (tem), multibyte); |
3415 | p += nbytes; | |
cb26008f KH |
3416 | tem = overlay_heads.buf[i].string2; |
3417 | if (STRINGP (tem)) | |
3418 | { | |
d5db4077 KR |
3419 | nbytes = copy_text (SDATA (tem), p, |
3420 | SBYTES (tem), | |
43d27a72 RS |
3421 | STRING_MULTIBYTE (tem), multibyte); |
3422 | p += nbytes; | |
cb26008f | 3423 | } |
bbbe9545 | 3424 | } |
cb26008f | 3425 | if (p != overlay_str_buf + total) |
1088b922 | 3426 | emacs_abort (); |
bbbe9545 KH |
3427 | if (pstr) |
3428 | *pstr = overlay_str_buf; | |
e8185fa8 | 3429 | return total; |
bbbe9545 | 3430 | } |
e8185fa8 | 3431 | return 0; |
bbbe9545 KH |
3432 | } |
3433 | \f | |
5c4f68f1 | 3434 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3435 | |
2eec3b4e | 3436 | void |
d311d28c | 3437 | recenter_overlay_lists (struct buffer *buf, ptrdiff_t pos) |
2eec3b4e | 3438 | { |
2410d73a SM |
3439 | Lisp_Object overlay, beg, end; |
3440 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3441 | |
3442 | /* See if anything in overlays_before should move to overlays_after. */ | |
3443 | ||
3444 | /* We don't strictly need prev in this loop; it should always be nil. | |
3445 | But we use it for symmetry and in case that should cease to be true | |
3446 | with some future change. */ | |
2410d73a | 3447 | prev = NULL; |
fd318b54 | 3448 | for (tail = buf->overlays_before; tail; prev = tail, tail = next) |
1ab256cb | 3449 | { |
2410d73a SM |
3450 | next = tail->next; |
3451 | XSETMISC (overlay, tail); | |
22657b40 | 3452 | eassert (OVERLAYP (overlay)); |
1ab256cb | 3453 | |
2eec3b4e RS |
3454 | beg = OVERLAY_START (overlay); |
3455 | end = OVERLAY_END (overlay); | |
1ab256cb | 3456 | |
2eec3b4e | 3457 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3458 | { |
2eec3b4e | 3459 | /* OVERLAY needs to be moved. */ |
d311d28c | 3460 | ptrdiff_t where = OVERLAY_POSITION (beg); |
2410d73a | 3461 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3462 | |
3463 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3464 | if (prev) |
3465 | prev->next = next; | |
2eec3b4e | 3466 | else |
0c94c8d6 | 3467 | set_buffer_overlays_before (buf, next); |
2eec3b4e RS |
3468 | |
3469 | /* Search thru overlays_after for where to put it. */ | |
2410d73a | 3470 | other_prev = NULL; |
fd318b54 | 3471 | for (other = buf->overlays_after; other; |
2410d73a | 3472 | other_prev = other, other = other->next) |
1ab256cb | 3473 | { |
6af718a4 | 3474 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3475 | |
2410d73a | 3476 | XSETMISC (otheroverlay, other); |
22657b40 | 3477 | eassert (OVERLAYP (otheroverlay)); |
2eec3b4e RS |
3478 | |
3479 | otherbeg = OVERLAY_START (otheroverlay); | |
3480 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3481 | break; | |
1ab256cb | 3482 | } |
2eec3b4e RS |
3483 | |
3484 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3485 | tail->next = other; |
3486 | if (other_prev) | |
3487 | other_prev->next = tail; | |
1ab256cb | 3488 | else |
0c94c8d6 | 3489 | set_buffer_overlays_after (buf, tail); |
2eec3b4e | 3490 | tail = prev; |
1ab256cb | 3491 | } |
2eec3b4e RS |
3492 | else |
3493 | /* We've reached the things that should stay in overlays_before. | |
3494 | All the rest of overlays_before must end even earlier, | |
3495 | so stop now. */ | |
3496 | break; | |
3497 | } | |
3498 | ||
3499 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a | 3500 | prev = NULL; |
fd318b54 | 3501 | for (tail = buf->overlays_after; tail; prev = tail, tail = next) |
2eec3b4e | 3502 | { |
2410d73a SM |
3503 | next = tail->next; |
3504 | XSETMISC (overlay, tail); | |
22657b40 | 3505 | eassert (OVERLAYP (overlay)); |
2eec3b4e RS |
3506 | |
3507 | beg = OVERLAY_START (overlay); | |
3508 | end = OVERLAY_END (overlay); | |
3509 | ||
3510 | /* Stop looking, when we know that nothing further | |
3511 | can possibly end before POS. */ | |
3512 | if (OVERLAY_POSITION (beg) > pos) | |
3513 | break; | |
3514 | ||
3515 | if (OVERLAY_POSITION (end) <= pos) | |
3516 | { | |
3517 | /* OVERLAY needs to be moved. */ | |
d311d28c | 3518 | ptrdiff_t where = OVERLAY_POSITION (end); |
2410d73a | 3519 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3520 | |
3521 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3522 | if (prev) |
3523 | prev->next = next; | |
2eec3b4e | 3524 | else |
0c94c8d6 | 3525 | set_buffer_overlays_after (buf, next); |
2eec3b4e RS |
3526 | |
3527 | /* Search thru overlays_before for where to put it. */ | |
2410d73a | 3528 | other_prev = NULL; |
fd318b54 | 3529 | for (other = buf->overlays_before; other; |
2410d73a | 3530 | other_prev = other, other = other->next) |
2eec3b4e RS |
3531 | { |
3532 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3533 | |
2410d73a | 3534 | XSETMISC (otheroverlay, other); |
22657b40 | 3535 | eassert (OVERLAYP (otheroverlay)); |
2eec3b4e RS |
3536 | |
3537 | otherend = OVERLAY_END (otheroverlay); | |
3538 | if (OVERLAY_POSITION (otherend) <= where) | |
3539 | break; | |
3540 | } | |
3541 | ||
3542 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3543 | tail->next = other; |
3544 | if (other_prev) | |
3545 | other_prev->next = tail; | |
2eec3b4e | 3546 | else |
0c94c8d6 | 3547 | set_buffer_overlays_before (buf, tail); |
2eec3b4e RS |
3548 | tail = prev; |
3549 | } | |
3550 | } | |
3551 | ||
c2d5b10f | 3552 | buf->overlay_center = pos; |
2eec3b4e | 3553 | } |
2b1bdf65 | 3554 | |
423cdb46 | 3555 | void |
d311d28c | 3556 | adjust_overlays_for_insert (ptrdiff_t pos, ptrdiff_t length) |
423cdb46 KH |
3557 | { |
3558 | /* After an insertion, the lists are still sorted properly, | |
3559 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3560 | if (current_buffer->overlay_center >= pos) |
3561 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3562 | } |
3563 | ||
3564 | void | |
d311d28c | 3565 | adjust_overlays_for_delete (ptrdiff_t pos, ptrdiff_t length) |
423cdb46 | 3566 | { |
c2d5b10f | 3567 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3568 | /* The deletion was to our right. No change needed; the before- and |
3569 | after-lists are still consistent. */ | |
3570 | ; | |
d311d28c | 3571 | else if (current_buffer->overlay_center - pos > length) |
423cdb46 KH |
3572 | /* The deletion was to our left. We need to adjust the center value |
3573 | to account for the change in position, but the lists are consistent | |
3574 | given the new value. */ | |
c2d5b10f | 3575 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3576 | else |
3577 | /* We're right in the middle. There might be things on the after-list | |
3578 | that now belong on the before-list. Recentering will move them, | |
3579 | and also update the center point. */ | |
3580 | recenter_overlay_lists (current_buffer, pos); | |
3581 | } | |
3582 | ||
2b1bdf65 KH |
3583 | /* Fix up overlays that were garbled as a result of permuting markers |
3584 | in the range START through END. Any overlay with at least one | |
3585 | endpoint in this range will need to be unlinked from the overlay | |
3586 | list and reinserted in its proper place. | |
3587 | Such an overlay might even have negative size at this point. | |
6b61353c | 3588 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3589 | void |
d311d28c | 3590 | fix_start_end_in_overlays (register ptrdiff_t start, register ptrdiff_t end) |
2b1bdf65 | 3591 | { |
6af718a4 | 3592 | Lisp_Object overlay; |
5df8f01b PE |
3593 | struct Lisp_Overlay *before_list IF_LINT (= NULL); |
3594 | struct Lisp_Overlay *after_list IF_LINT (= NULL); | |
1138e742 KR |
3595 | /* These are either nil, indicating that before_list or after_list |
3596 | should be assigned, or the cons cell the cdr of which should be | |
3597 | assigned. */ | |
2410d73a | 3598 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 | 3599 | /* 'Parent', likewise, indicates a cons cell or |
fd318b54 | 3600 | current_buffer->overlays_before or overlays_after, depending |
1138e742 | 3601 | which loop we're in. */ |
2410d73a | 3602 | struct Lisp_Overlay *tail, *parent; |
d311d28c | 3603 | ptrdiff_t startpos, endpos; |
2b1bdf65 KH |
3604 | |
3605 | /* This algorithm shifts links around instead of consing and GCing. | |
3606 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3607 | well-formed list except that its last element, the CDR of beforep |
3608 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3609 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3610 | that before_list isn't initialized, although it may look | |
3611 | strange. */ | |
fd318b54 | 3612 | for (parent = NULL, tail = current_buffer->overlays_before; tail;) |
2b1bdf65 | 3613 | { |
2410d73a | 3614 | XSETMISC (overlay, tail); |
6b61353c | 3615 | |
2b1bdf65 | 3616 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
6b61353c KH |
3617 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3618 | ||
3619 | /* If the overlay is backwards, make it empty. */ | |
3620 | if (endpos < startpos) | |
3621 | { | |
3622 | startpos = endpos; | |
3623 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3624 | Qnil); | |
3625 | } | |
3626 | ||
2b1bdf65 KH |
3627 | if (endpos < start) |
3628 | break; | |
60ebfdf3 | 3629 | |
2b1bdf65 KH |
3630 | if (endpos < end |
3631 | || (startpos >= start && startpos < end)) | |
3632 | { | |
2b1bdf65 KH |
3633 | /* Add it to the end of the wrong list. Later on, |
3634 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3635 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3636 | { |
2410d73a | 3637 | if (!afterp) |
1138e742 KR |
3638 | after_list = tail; |
3639 | else | |
2410d73a | 3640 | afterp->next = tail; |
1138e742 | 3641 | afterp = tail; |
2b1bdf65 KH |
3642 | } |
3643 | else | |
3644 | { | |
2410d73a | 3645 | if (!beforep) |
1138e742 KR |
3646 | before_list = tail; |
3647 | else | |
2410d73a | 3648 | beforep->next = tail; |
1138e742 | 3649 | beforep = tail; |
2b1bdf65 | 3650 | } |
2410d73a | 3651 | if (!parent) |
0c94c8d6 | 3652 | set_buffer_overlays_before (current_buffer, tail->next); |
1138e742 | 3653 | else |
2410d73a SM |
3654 | parent->next = tail->next; |
3655 | tail = tail->next; | |
2b1bdf65 KH |
3656 | } |
3657 | else | |
2410d73a | 3658 | parent = tail, tail = parent->next; |
2b1bdf65 | 3659 | } |
fd318b54 | 3660 | for (parent = NULL, tail = current_buffer->overlays_after; tail;) |
2b1bdf65 | 3661 | { |
2410d73a | 3662 | XSETMISC (overlay, tail); |
6b61353c | 3663 | |
2b1bdf65 | 3664 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
6b61353c KH |
3665 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3666 | ||
3667 | /* If the overlay is backwards, make it empty. */ | |
3668 | if (endpos < startpos) | |
3669 | { | |
3670 | startpos = endpos; | |
3671 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3672 | Qnil); |
6b61353c KH |
3673 | } |
3674 | ||
2b1bdf65 KH |
3675 | if (startpos >= end) |
3676 | break; | |
6b61353c | 3677 | |
2b1bdf65 KH |
3678 | if (startpos >= start |
3679 | || (endpos >= start && endpos < end)) | |
3680 | { | |
c2d5b10f | 3681 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3682 | { |
2410d73a | 3683 | if (!afterp) |
1138e742 KR |
3684 | after_list = tail; |
3685 | else | |
2410d73a | 3686 | afterp->next = tail; |
1138e742 | 3687 | afterp = tail; |
2b1bdf65 KH |
3688 | } |
3689 | else | |
3690 | { | |
2410d73a | 3691 | if (!beforep) |
1138e742 KR |
3692 | before_list = tail; |
3693 | else | |
2410d73a | 3694 | beforep->next = tail; |
1138e742 | 3695 | beforep = tail; |
2b1bdf65 | 3696 | } |
2410d73a | 3697 | if (!parent) |
0c94c8d6 | 3698 | set_buffer_overlays_after (current_buffer, tail->next); |
1138e742 | 3699 | else |
2410d73a SM |
3700 | parent->next = tail->next; |
3701 | tail = tail->next; | |
2b1bdf65 KH |
3702 | } |
3703 | else | |
2410d73a | 3704 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3705 | } |
3706 | ||
3707 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3708 | and let the recenter function make it sane again. */ | |
2410d73a | 3709 | if (beforep) |
1138e742 | 3710 | { |
fd318b54 | 3711 | beforep->next = current_buffer->overlays_before; |
0c94c8d6 | 3712 | set_buffer_overlays_before (current_buffer, before_list); |
1138e742 | 3713 | } |
2b1bdf65 | 3714 | |
2410d73a | 3715 | if (afterp) |
1138e742 | 3716 | { |
fd318b54 | 3717 | afterp->next = current_buffer->overlays_after; |
0c94c8d6 | 3718 | set_buffer_overlays_after (current_buffer, after_list); |
1138e742 | 3719 | } |
c2d5b10f | 3720 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3721 | } |
3b06f880 KH |
3722 | |
3723 | /* We have two types of overlay: the one whose ending marker is | |
3724 | after-insertion-marker (this is the usual case) and the one whose | |
3725 | ending marker is before-insertion-marker. When `overlays_before' | |
3726 | contains overlays of the latter type and the former type in this | |
3727 | order and both overlays end at inserting position, inserting a text | |
3728 | increases only the ending marker of the latter type, which results | |
3729 | in incorrect ordering of `overlays_before'. | |
3730 | ||
3731 | This function fixes ordering of overlays in the slot | |
3732 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3733 | was at PREV, and now is at POS. */ | |
3734 | ||
01136e9b | 3735 | void |
d311d28c | 3736 | fix_overlays_before (struct buffer *bp, ptrdiff_t prev, ptrdiff_t pos) |
3b06f880 | 3737 | { |
2410d73a | 3738 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
fd318b54 | 3739 | struct Lisp_Overlay *tail = bp->overlays_before, *parent = NULL, *right_pair; |
2410d73a | 3740 | Lisp_Object tem; |
d311d28c | 3741 | ptrdiff_t end IF_LINT (= 0); |
3b06f880 KH |
3742 | |
3743 | /* After the insertion, the several overlays may be in incorrect | |
3744 | order. The possibility is that, in the list `overlays_before', | |
3745 | an overlay which ends at POS appears after an overlay which ends | |
3746 | at PREV. Since POS is greater than PREV, we must fix the | |
3747 | ordering of these overlays, by moving overlays ends at POS before | |
3748 | the overlays ends at PREV. */ | |
3749 | ||
3750 | /* At first, find a place where disordered overlays should be linked | |
3751 | in. It is where an overlay which end before POS exists. (i.e. an | |
3752 | overlay whose ending marker is after-insertion-marker if disorder | |
3753 | exists). */ | |
2410d73a SM |
3754 | while (tail |
3755 | && (XSETMISC (tem, tail), | |
3756 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3757 | { |
3758 | parent = tail; | |
2410d73a | 3759 | tail = tail->next; |
1138e742 | 3760 | } |
3b06f880 KH |
3761 | |
3762 | /* If we don't find such an overlay, | |
3763 | or the found one ends before PREV, | |
3764 | or the found one is the last one in the list, | |
3765 | we don't have to fix anything. */ | |
f93ad4cf | 3766 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3767 | return; |
3768 | ||
1138e742 KR |
3769 | right_pair = parent; |
3770 | parent = tail; | |
2410d73a | 3771 | tail = tail->next; |
3b06f880 | 3772 | |
1138e742 | 3773 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3774 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3775 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3776 | we found an overlay which ends before PREV, the remaining | |
3777 | overlays are in correct order. */ | |
2410d73a | 3778 | while (tail) |
3b06f880 | 3779 | { |
2410d73a SM |
3780 | XSETMISC (tem, tail); |
3781 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3782 | |
3783 | if (end == pos) | |
3784 | { /* This overlay is disordered. */ | |
2410d73a | 3785 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3786 | |
3787 | /* Unlink the found overlay. */ | |
2410d73a SM |
3788 | tail = found->next; |
3789 | parent->next = tail; | |
1138e742 KR |
3790 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3791 | and link it into the right place. */ | |
2410d73a | 3792 | if (!right_pair) |
1138e742 | 3793 | { |
fd318b54 | 3794 | found->next = bp->overlays_before; |
0c94c8d6 | 3795 | set_buffer_overlays_before (bp, found); |
1138e742 KR |
3796 | } |
3797 | else | |
3798 | { | |
2410d73a SM |
3799 | found->next = right_pair->next; |
3800 | right_pair->next = found; | |
1138e742 | 3801 | } |
3b06f880 KH |
3802 | } |
3803 | else if (end == prev) | |
1138e742 KR |
3804 | { |
3805 | parent = tail; | |
2410d73a | 3806 | tail = tail->next; |
1138e742 | 3807 | } |
3b06f880 KH |
3808 | else /* No more disordered overlay. */ |
3809 | break; | |
3810 | } | |
3811 | } | |
2eec3b4e | 3812 | \f |
52f8ec73 | 3813 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 | 3814 | doc: /* Return t if OBJECT is an overlay. */) |
5842a27b | 3815 | (Lisp_Object object) |
52f8ec73 JB |
3816 | { |
3817 | return (OVERLAYP (object) ? Qt : Qnil); | |
3818 | } | |
3819 | ||
acac2700 | 3820 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3821 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3822 | If omitted, BUFFER defaults to the current buffer. |
3823 | BEG and END may be integers or markers. | |
a625ee20 RS |
3824 | The fourth arg FRONT-ADVANCE, if non-nil, makes the marker |
3825 | for the front of the overlay advance when text is inserted there | |
63af6055 | 3826 | \(which means the text *is not* included in the overlay). |
a625ee20 RS |
3827 | The fifth arg REAR-ADVANCE, if non-nil, makes the marker |
3828 | for the rear of the overlay advance when text is inserted there | |
63af6055 | 3829 | \(which means the text *is* included in the overlay). */) |
b1cf96de DA |
3830 | (Lisp_Object beg, Lisp_Object end, Lisp_Object buffer, |
3831 | Lisp_Object front_advance, Lisp_Object rear_advance) | |
2eec3b4e RS |
3832 | { |
3833 | Lisp_Object overlay; | |
5c4f68f1 | 3834 | struct buffer *b; |
2eec3b4e | 3835 | |
5c4f68f1 | 3836 | if (NILP (buffer)) |
67180c6a | 3837 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3838 | else |
b7826503 | 3839 | CHECK_BUFFER (buffer); |
b1cf96de DA |
3840 | |
3841 | if (MARKERP (beg) && !EQ (Fmarker_buffer (beg), buffer)) | |
3842 | signal_error ("Marker points into wrong buffer", beg); | |
3843 | if (MARKERP (end) && !EQ (Fmarker_buffer (end), buffer)) | |
3844 | signal_error ("Marker points into wrong buffer", end); | |
2eec3b4e | 3845 | |
b7826503 PJ |
3846 | CHECK_NUMBER_COERCE_MARKER (beg); |
3847 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3848 | |
883047b9 | 3849 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3850 | { |
c99fc30f KH |
3851 | Lisp_Object temp; |
3852 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3853 | } |
883047b9 JB |
3854 | |
3855 | b = XBUFFER (buffer); | |
3856 | ||
3857 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3858 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3859 | |
acac2700 RS |
3860 | if (!NILP (front_advance)) |
3861 | XMARKER (beg)->insertion_type = 1; | |
3862 | if (!NILP (rear_advance)) | |
3863 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3864 | |
d7a7fda3 | 3865 | overlay = build_overlay (beg, end, Qnil); |
2eec3b4e | 3866 | |
177c0ea7 | 3867 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3868 | end = OVERLAY_END (overlay); |
c2d5b10f | 3869 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a | 3870 | { |
64edc777 | 3871 | eassert (b->overlays_after || (XOVERLAY (overlay)->next == NULL)); |
090cf9db | 3872 | XOVERLAY (overlay)->next = b->overlays_after; |
0c94c8d6 | 3873 | set_buffer_overlays_after (b, XOVERLAY (overlay)); |
2410d73a | 3874 | } |
2eec3b4e | 3875 | else |
2410d73a | 3876 | { |
64edc777 | 3877 | eassert (b->overlays_before || (XOVERLAY (overlay)->next == NULL)); |
090cf9db | 3878 | XOVERLAY (overlay)->next = b->overlays_before; |
0c94c8d6 | 3879 | set_buffer_overlays_before (b, XOVERLAY (overlay)); |
2410d73a | 3880 | } |
2eec3b4e | 3881 | /* This puts it in the right list, and in the right order. */ |
c2d5b10f | 3882 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3883 | |
b61982dd JB |
3884 | /* We don't need to redisplay the region covered by the overlay, because |
3885 | the overlay has no properties at the moment. */ | |
3886 | ||
2eec3b4e RS |
3887 | return overlay; |
3888 | } | |
876aa27c RS |
3889 | \f |
3890 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3891 | ||
3892 | static void | |
d311d28c | 3893 | modify_overlay (struct buffer *buf, ptrdiff_t start, ptrdiff_t end) |
876aa27c | 3894 | { |
876aa27c RS |
3895 | if (start > end) |
3896 | { | |
d311d28c | 3897 | ptrdiff_t temp = start; |
26f545d7 GM |
3898 | start = end; |
3899 | end = temp; | |
876aa27c RS |
3900 | } |
3901 | ||
481b5054 | 3902 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3903 | |
655ab9a3 | 3904 | bset_redisplay (buf); |
876aa27c | 3905 | |
d8b9150f | 3906 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3907 | } |
2eec3b4e | 3908 | |
7b7ae965 DA |
3909 | /* Remove OVERLAY from LIST. */ |
3910 | ||
2410d73a | 3911 | static struct Lisp_Overlay * |
d3da34e0 | 3912 | unchain_overlay (struct Lisp_Overlay *list, struct Lisp_Overlay *overlay) |
2410d73a | 3913 | { |
7b7ae965 DA |
3914 | register struct Lisp_Overlay *tail, **prev = &list; |
3915 | ||
3916 | for (tail = list; tail; prev = &tail->next, tail = *prev) | |
3917 | if (tail == overlay) | |
2410d73a | 3918 | { |
7b7ae965 | 3919 | *prev = overlay->next; |
2410d73a SM |
3920 | overlay->next = NULL; |
3921 | break; | |
3922 | } | |
3923 | return list; | |
3924 | } | |
3925 | ||
4cb3e6b3 DA |
3926 | /* Remove OVERLAY from both overlay lists of B. */ |
3927 | ||
3928 | static void | |
3929 | unchain_both (struct buffer *b, Lisp_Object overlay) | |
3930 | { | |
3931 | struct Lisp_Overlay *ov = XOVERLAY (overlay); | |
3932 | ||
0c94c8d6 PE |
3933 | set_buffer_overlays_before (b, unchain_overlay (b->overlays_before, ov)); |
3934 | set_buffer_overlays_after (b, unchain_overlay (b->overlays_after, ov)); | |
fd318b54 | 3935 | eassert (XOVERLAY (overlay)->next == NULL); |
4cb3e6b3 DA |
3936 | } |
3937 | ||
5c4f68f1 | 3938 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3939 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3940 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3941 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 | 3942 | buffer. */) |
5842a27b | 3943 | (Lisp_Object overlay, Lisp_Object beg, Lisp_Object end, Lisp_Object buffer) |
2eec3b4e | 3944 | { |
471fe23d | 3945 | struct buffer *b, *ob = 0; |
0a4469c9 | 3946 | Lisp_Object obuffer; |
d311d28c | 3947 | ptrdiff_t count = SPECPDL_INDEX (); |
471fe23d | 3948 | ptrdiff_t n_beg, n_end, o_beg IF_LINT (= 0), o_end IF_LINT (= 0); |
5c4f68f1 | 3949 | |
b7826503 | 3950 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3951 | if (NILP (buffer)) |
3952 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3953 | if (NILP (buffer)) |
67180c6a | 3954 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3955 | CHECK_BUFFER (buffer); |
883047b9 | 3956 | |
471fe23d TN |
3957 | if (NILP (Fbuffer_live_p (buffer))) |
3958 | error ("Attempt to move overlay to a dead buffer"); | |
3959 | ||
b1cf96de DA |
3960 | if (MARKERP (beg) && !EQ (Fmarker_buffer (beg), buffer)) |
3961 | signal_error ("Marker points into wrong buffer", beg); | |
3962 | if (MARKERP (end) && !EQ (Fmarker_buffer (end), buffer)) | |
3963 | signal_error ("Marker points into wrong buffer", end); | |
883047b9 | 3964 | |
b7826503 PJ |
3965 | CHECK_NUMBER_COERCE_MARKER (beg); |
3966 | CHECK_NUMBER_COERCE_MARKER (end); | |
d311d28c | 3967 | |
471fe23d | 3968 | if (XINT (beg) > XINT (end)) |
02481186 | 3969 | { |
471fe23d TN |
3970 | Lisp_Object temp; |
3971 | temp = beg; beg = end; end = temp; | |
02481186 PE |
3972 | } |
3973 | ||
9d7608b7 KH |
3974 | specbind (Qinhibit_quit, Qt); |
3975 | ||
0a4469c9 | 3976 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
79cce3f2 | 3977 | b = XBUFFER (buffer); |
471fe23d TN |
3978 | |
3979 | if (!NILP (obuffer)) | |
3980 | { | |
3981 | ob = XBUFFER (obuffer); | |
3982 | ||
3983 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3984 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3985 | ||
4cb3e6b3 | 3986 | unchain_both (ob, overlay); |
471fe23d TN |
3987 | } |
3988 | ||
3989 | /* Set the overlay boundaries, which may clip them. */ | |
3990 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3991 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
3992 | ||
3993 | n_beg = marker_position (OVERLAY_START (overlay)); | |
3994 | n_end = marker_position (OVERLAY_END (overlay)); | |
2eec3b4e | 3995 | |
c82ed728 | 3996 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3997 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3998 | { |
3999 | /* Redisplay where the overlay was. */ | |
471fe23d TN |
4000 | if (ob) |
4001 | modify_overlay (ob, o_beg, o_end); | |
50760c4a RS |
4002 | |
4003 | /* Redisplay where the overlay is going to be. */ | |
79cce3f2 | 4004 | modify_overlay (b, n_beg, n_end); |
50760c4a | 4005 | } |
c82ed728 JB |
4006 | else |
4007 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
4008 | { | |
79cce3f2 PE |
4009 | if (o_beg == n_beg) |
4010 | modify_overlay (b, o_end, n_end); | |
4011 | else if (o_end == n_end) | |
4012 | modify_overlay (b, o_beg, n_beg); | |
c82ed728 | 4013 | else |
79cce3f2 | 4014 | modify_overlay (b, min (o_beg, n_beg), max (o_end, n_end)); |
c82ed728 | 4015 | } |
b61982dd | 4016 | |
471fe23d TN |
4017 | /* Delete the overlay if it is empty after clipping and has the |
4018 | evaporate property. */ | |
4019 | if (n_beg == n_end && !NILP (Foverlay_get (overlay, Qevaporate))) | |
4020 | return unbind_to (count, Fdelete_overlay (overlay)); | |
02481186 | 4021 | |
471fe23d TN |
4022 | /* Put the overlay into the new buffer's overlay lists, first on the |
4023 | wrong list. */ | |
4024 | if (n_end < b->overlay_center) | |
2410d73a | 4025 | { |
fd318b54 | 4026 | XOVERLAY (overlay)->next = b->overlays_after; |
0c94c8d6 | 4027 | set_buffer_overlays_after (b, XOVERLAY (overlay)); |
2410d73a | 4028 | } |
2eec3b4e | 4029 | else |
2410d73a | 4030 | { |
fd318b54 | 4031 | XOVERLAY (overlay)->next = b->overlays_before; |
0c94c8d6 | 4032 | set_buffer_overlays_before (b, XOVERLAY (overlay)); |
2410d73a | 4033 | } |
2eec3b4e RS |
4034 | |
4035 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 4036 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 4037 | |
0a4469c9 | 4038 | return unbind_to (count, overlay); |
2eec3b4e RS |
4039 | } |
4040 | ||
4041 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 | 4042 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
5842a27b | 4043 | (Lisp_Object overlay) |
2eec3b4e | 4044 | { |
0a4469c9 | 4045 | Lisp_Object buffer; |
5c4f68f1 | 4046 | struct buffer *b; |
d311d28c | 4047 | ptrdiff_t count = SPECPDL_INDEX (); |
5c4f68f1 | 4048 | |
b7826503 | 4049 | CHECK_OVERLAY (overlay); |
52f8ec73 | 4050 | |
0a4469c9 RS |
4051 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4052 | if (NILP (buffer)) | |
4053 | return Qnil; | |
4054 | ||
4055 | b = XBUFFER (buffer); | |
0a4469c9 | 4056 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 4057 | |
4cb3e6b3 | 4058 | unchain_both (b, overlay); |
041a49a6 | 4059 | drop_overlay (b, XOVERLAY (overlay)); |
3ece337a | 4060 | |
e58c389d | 4061 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
4062 | display optimizations for the affected buffer, on the basis that |
4063 | these strings may contain newlines. This is easier to do than to | |
4064 | check for that situation during redisplay. */ | |
4065 | if (!windows_or_buffers_changed | |
4066 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
4067 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
4068 | b->prevent_redisplay_optimizations_p = 1; | |
4069 | ||
0a4469c9 | 4070 | return unbind_to (count, Qnil); |
2eec3b4e | 4071 | } |
c5e28e39 MR |
4072 | |
4073 | DEFUN ("delete-all-overlays", Fdelete_all_overlays, Sdelete_all_overlays, 0, 1, 0, | |
4074 | doc: /* Delete all overlays of BUFFER. | |
4075 | BUFFER omitted or nil means delete all overlays of the current | |
4076 | buffer. */) | |
4077 | (Lisp_Object buffer) | |
4078 | { | |
4079 | register struct buffer *buf; | |
4080 | ||
4081 | if (NILP (buffer)) | |
4082 | buf = current_buffer; | |
4083 | else | |
4084 | { | |
4085 | CHECK_BUFFER (buffer); | |
4086 | buf = XBUFFER (buffer); | |
4087 | } | |
4088 | ||
4089 | delete_all_overlays (buf); | |
26d4541d | 4090 | return Qnil; |
c5e28e39 | 4091 | } |
2eec3b4e | 4092 | \f |
8ebafa8d JB |
4093 | /* Overlay dissection functions. */ |
4094 | ||
a7ca3326 | 4095 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, |
7ee72033 | 4096 | doc: /* Return the position at which OVERLAY starts. */) |
5842a27b | 4097 | (Lisp_Object overlay) |
8ebafa8d | 4098 | { |
b7826503 | 4099 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4100 | |
4101 | return (Fmarker_position (OVERLAY_START (overlay))); | |
4102 | } | |
4103 | ||
a7ca3326 | 4104 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, |
7ee72033 | 4105 | doc: /* Return the position at which OVERLAY ends. */) |
5842a27b | 4106 | (Lisp_Object overlay) |
8ebafa8d | 4107 | { |
b7826503 | 4108 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4109 | |
4110 | return (Fmarker_position (OVERLAY_END (overlay))); | |
4111 | } | |
4112 | ||
4113 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
563f7128 LK |
4114 | doc: /* Return the buffer OVERLAY belongs to. |
4115 | Return nil if OVERLAY has been deleted. */) | |
5842a27b | 4116 | (Lisp_Object overlay) |
8ebafa8d | 4117 | { |
b7826503 | 4118 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4119 | |
4120 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
4121 | } | |
4122 | ||
4123 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 4124 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 4125 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 | 4126 | OVERLAY. */) |
5842a27b | 4127 | (Lisp_Object overlay) |
8ebafa8d | 4128 | { |
b7826503 | 4129 | CHECK_OVERLAY (overlay); |
8ebafa8d | 4130 | |
c644523b | 4131 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
4132 | } |
4133 | ||
4134 | \f | |
2eec3b4e | 4135 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
aabc29c8 | 4136 | doc: /* Return a list of the overlays that contain the character at POS. */) |
5842a27b | 4137 | (Lisp_Object pos) |
2eec3b4e | 4138 | { |
b081724f | 4139 | ptrdiff_t len, noverlays; |
2eec3b4e | 4140 | Lisp_Object *overlay_vec; |
2eec3b4e RS |
4141 | Lisp_Object result; |
4142 | ||
b7826503 | 4143 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4144 | |
6bdcbfe1 DA |
4145 | if (!buffer_has_overlays ()) |
4146 | return Qnil; | |
4147 | ||
2eec3b4e | 4148 | len = 10; |
a9800ae8 | 4149 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
38182d90 | 4150 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
2eec3b4e RS |
4151 | |
4152 | /* Put all the overlays we want in a vector in overlay_vec. | |
4153 | Store the length in len. */ | |
2a77a7d7 | 4154 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
090cf9db | 4155 | NULL, NULL, 0); |
2eec3b4e RS |
4156 | |
4157 | /* Make a list of them all. */ | |
4158 | result = Flist (noverlays, overlay_vec); | |
4159 | ||
9ac0d9e0 | 4160 | xfree (overlay_vec); |
2eec3b4e RS |
4161 | return result; |
4162 | } | |
4163 | ||
74514898 | 4164 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 4165 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
4166 | Overlap means that at least one character is contained within the overlay |
4167 | and also contained within the specified region. | |
7723e095 MR |
4168 | Empty overlays are included in the result if they are located at BEG, |
4169 | between BEG and END, or at END provided END denotes the position at the | |
4170 | end of the buffer. */) | |
5842a27b | 4171 | (Lisp_Object beg, Lisp_Object end) |
74514898 | 4172 | { |
21514da7 | 4173 | ptrdiff_t len, noverlays; |
74514898 | 4174 | Lisp_Object *overlay_vec; |
74514898 RS |
4175 | Lisp_Object result; |
4176 | ||
b7826503 PJ |
4177 | CHECK_NUMBER_COERCE_MARKER (beg); |
4178 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 | 4179 | |
6bdcbfe1 DA |
4180 | if (!buffer_has_overlays ()) |
4181 | return Qnil; | |
4182 | ||
74514898 | 4183 | len = 10; |
38182d90 | 4184 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
74514898 RS |
4185 | |
4186 | /* Put all the overlays we want in a vector in overlay_vec. | |
4187 | Store the length in len. */ | |
4188 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
145582a0 | 4189 | NULL, NULL); |
74514898 RS |
4190 | |
4191 | /* Make a list of them all. */ | |
4192 | result = Flist (noverlays, overlay_vec); | |
4193 | ||
4194 | xfree (overlay_vec); | |
4195 | return result; | |
4196 | } | |
4197 | ||
a7ca3326 | 4198 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 4199 | 1, 1, 0, |
7ee72033 | 4200 | doc: /* Return the next position after POS where an overlay starts or ends. |
624d2678 RS |
4201 | If there are no overlay boundaries from POS to (point-max), |
4202 | the value is (point-max). */) | |
5842a27b | 4203 | (Lisp_Object pos) |
2eec3b4e | 4204 | { |
b081724f | 4205 | ptrdiff_t i, len, noverlays; |
d311d28c | 4206 | ptrdiff_t endpos; |
2eec3b4e | 4207 | Lisp_Object *overlay_vec; |
2eec3b4e | 4208 | |
b7826503 | 4209 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4210 | |
6bdcbfe1 DA |
4211 | if (!buffer_has_overlays ()) |
4212 | return make_number (ZV); | |
4213 | ||
2eec3b4e | 4214 | len = 10; |
38182d90 | 4215 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
2eec3b4e RS |
4216 | |
4217 | /* Put all the overlays we want in a vector in overlay_vec. | |
4218 | Store the length in len. | |
4219 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 4220 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 4221 | &endpos, 0, 1); |
2eec3b4e RS |
4222 | |
4223 | /* If any of these overlays ends before endpos, | |
4224 | use its ending point instead. */ | |
4225 | for (i = 0; i < noverlays; i++) | |
4226 | { | |
4227 | Lisp_Object oend; | |
d311d28c | 4228 | ptrdiff_t oendpos; |
2eec3b4e RS |
4229 | |
4230 | oend = OVERLAY_END (overlay_vec[i]); | |
4231 | oendpos = OVERLAY_POSITION (oend); | |
4232 | if (oendpos < endpos) | |
4233 | endpos = oendpos; | |
1ab256cb RM |
4234 | } |
4235 | ||
9ac0d9e0 | 4236 | xfree (overlay_vec); |
2eec3b4e RS |
4237 | return make_number (endpos); |
4238 | } | |
239c932b | 4239 | |
a7ca3326 | 4240 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, |
239c932b | 4241 | Sprevious_overlay_change, 1, 1, 0, |
7ee72033 | 4242 | doc: /* Return the previous position before POS where an overlay starts or ends. |
624d2678 RS |
4243 | If there are no overlay boundaries from (point-min) to POS, |
4244 | the value is (point-min). */) | |
5842a27b | 4245 | (Lisp_Object pos) |
239c932b | 4246 | { |
d311d28c | 4247 | ptrdiff_t prevpos; |
239c932b | 4248 | Lisp_Object *overlay_vec; |
b081724f | 4249 | ptrdiff_t len; |
239c932b | 4250 | |
b7826503 | 4251 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 4252 | |
6bdcbfe1 DA |
4253 | if (!buffer_has_overlays ()) |
4254 | return make_number (BEGV); | |
4255 | ||
624bbdc4 RS |
4256 | /* At beginning of buffer, we know the answer; |
4257 | avoid bug subtracting 1 below. */ | |
4258 | if (XINT (pos) == BEGV) | |
4259 | return pos; | |
4260 | ||
017f0539 | 4261 | len = 10; |
38182d90 | 4262 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
017f0539 | 4263 | |
239c932b RS |
4264 | /* Put all the overlays we want in a vector in overlay_vec. |
4265 | Store the length in len. | |
daa1c109 | 4266 | prevpos gets the position of the previous change. */ |
328ab8e7 | 4267 | overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 4268 | 0, &prevpos, 1); |
239c932b | 4269 | |
239c932b RS |
4270 | xfree (overlay_vec); |
4271 | return make_number (prevpos); | |
4272 | } | |
2eec3b4e RS |
4273 | \f |
4274 | /* These functions are for debugging overlays. */ | |
4275 | ||
4276 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4277 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4278 | The car has all the overlays before the overlay center; |
4279 | the cdr has all the overlays after the overlay center. | |
4280 | Recentering overlays moves overlays between these lists. | |
4281 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 | 4282 | However, the overlays you get are the real objects that the buffer uses. */) |
5842a27b | 4283 | (void) |
2eec3b4e | 4284 | { |
2410d73a SM |
4285 | struct Lisp_Overlay *ol; |
4286 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4cb3e6b3 | 4287 | |
fd318b54 | 4288 | for (ol = current_buffer->overlays_before; ol; ol = ol->next) |
2410d73a SM |
4289 | { |
4290 | XSETMISC (tmp, ol); | |
4291 | before = Fcons (tmp, before); | |
4292 | } | |
fd318b54 | 4293 | for (ol = current_buffer->overlays_after; ol; ol = ol->next) |
2410d73a SM |
4294 | { |
4295 | XSETMISC (tmp, ol); | |
4296 | after = Fcons (tmp, after); | |
4297 | } | |
4cb3e6b3 | 4298 | |
2410d73a | 4299 | return Fcons (Fnreverse (before), Fnreverse (after)); |
2eec3b4e RS |
4300 | } |
4301 | ||
4302 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4303 | doc: /* Recenter the overlays of the current buffer around position POS. |
4304 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4305 | for positions far away from POS). */) | |
5842a27b | 4306 | (Lisp_Object pos) |
2eec3b4e | 4307 | { |
d311d28c | 4308 | ptrdiff_t p; |
b7826503 | 4309 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4310 | |
d311d28c PE |
4311 | p = clip_to_bounds (PTRDIFF_MIN, XINT (pos), PTRDIFF_MAX); |
4312 | recenter_overlay_lists (current_buffer, p); | |
2eec3b4e RS |
4313 | return Qnil; |
4314 | } | |
4315 | \f | |
a7ca3326 | 4316 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, |
7ee72033 | 4317 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
5842a27b | 4318 | (Lisp_Object overlay, Lisp_Object prop) |
2eec3b4e | 4319 | { |
b7826503 | 4320 | CHECK_OVERLAY (overlay); |
c644523b | 4321 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
4322 | } |
4323 | ||
4324 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7c301272 LMI |
4325 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. |
4326 | VALUE will be returned.*/) | |
5842a27b | 4327 | (Lisp_Object overlay, Lisp_Object prop, Lisp_Object value) |
2eec3b4e | 4328 | { |
48e2e3ba | 4329 | Lisp_Object tail, buffer; |
37ef52bb | 4330 | bool changed; |
2eec3b4e | 4331 | |
b7826503 | 4332 | CHECK_OVERLAY (overlay); |
b61982dd | 4333 | |
274a9425 RS |
4334 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4335 | ||
c644523b | 4336 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
4337 | CONSP (tail) && CONSP (XCDR (tail)); |
4338 | tail = XCDR (XCDR (tail))) | |
4339 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 4340 | { |
7539e11f | 4341 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 4342 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 4343 | goto found; |
274a9425 | 4344 | } |
9d7608b7 KH |
4345 | /* It wasn't in the list, so add it to the front. */ |
4346 | changed = !NILP (value); | |
c644523b DA |
4347 | set_overlay_plist |
4348 | (overlay, Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist))); | |
9d7608b7 KH |
4349 | found: |
4350 | if (! NILP (buffer)) | |
4351 | { | |
4352 | if (changed) | |
876aa27c | 4353 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
4354 | marker_position (OVERLAY_START (overlay)), |
4355 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
4356 | if (EQ (prop, Qevaporate) && ! NILP (value) |
4357 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
4358 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
4359 | Fdelete_overlay (overlay); | |
4360 | } | |
7d63db98 | 4361 | |
2eec3b4e | 4362 | return value; |
1ab256cb RM |
4363 | } |
4364 | \f | |
9115729e KH |
4365 | /* Subroutine of report_overlay_modification. */ |
4366 | ||
4367 | /* Lisp vector holding overlay hook functions to call. | |
4368 | Vector elements come in pairs. | |
4369 | Each even-index element is a list of hook functions. | |
4370 | The following odd-index element is the overlay they came from. | |
4371 | ||
4372 | Before the buffer change, we fill in this vector | |
4373 | as we call overlay hook functions. | |
4374 | After the buffer change, we get the functions to call from this vector. | |
4375 | This way we always call the same functions before and after the change. */ | |
4376 | static Lisp_Object last_overlay_modification_hooks; | |
4377 | ||
4378 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
d311d28c | 4379 | static ptrdiff_t last_overlay_modification_hooks_used; |
9115729e KH |
4380 | |
4381 | /* Add one functionlist/overlay pair | |
4382 | to the end of last_overlay_modification_hooks. */ | |
4383 | ||
4384 | static void | |
d3da34e0 | 4385 | add_overlay_mod_hooklist (Lisp_Object functionlist, Lisp_Object overlay) |
9115729e | 4386 | { |
d311d28c | 4387 | ptrdiff_t oldsize = ASIZE (last_overlay_modification_hooks); |
9115729e | 4388 | |
d311d28c PE |
4389 | if (oldsize - 1 <= last_overlay_modification_hooks_used) |
4390 | last_overlay_modification_hooks = | |
4391 | larger_vector (last_overlay_modification_hooks, 2, -1); | |
3ae565b3 SM |
4392 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, |
4393 | functionlist); last_overlay_modification_hooks_used++; | |
4394 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, | |
4395 | overlay); last_overlay_modification_hooks_used++; | |
9115729e KH |
4396 | } |
4397 | \f | |
173f2a64 RS |
4398 | /* Run the modification-hooks of overlays that include |
4399 | any part of the text in START to END. | |
9115729e KH |
4400 | If this change is an insertion, also |
4401 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4402 | and the insert-after-hooks of overlay ending at START. |
4403 | ||
4404 | This is called both before and after the modification. | |
37ef52bb | 4405 | AFTER is true when we call after the modification. |
930a9140 | 4406 | |
9115729e KH |
4407 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4408 | When AFTER is nonzero, they are the start position, | |
4409 | the position after the inserted new text, | |
4410 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4411 | |
4412 | void | |
37ef52bb | 4413 | report_overlay_modification (Lisp_Object start, Lisp_Object end, bool after, |
d3da34e0 | 4414 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) |
173f2a64 | 4415 | { |
2410d73a SM |
4416 | Lisp_Object prop, overlay; |
4417 | struct Lisp_Overlay *tail; | |
37ef52bb PE |
4418 | /* True if this change is an insertion. */ |
4419 | bool insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4420 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4421 | |
4422 | overlay = Qnil; | |
2410d73a | 4423 | tail = NULL; |
9115729e | 4424 | |
27c6b98e SM |
4425 | /* We used to run the functions as soon as we found them and only register |
4426 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4427 | case. But running elisp code as we traverse the list of overlays is | |
4428 | painful because the list can be modified by the elisp code so we had to | |
4429 | copy at several places. We now simply do a read-only traversal that | |
4430 | only collects the functions to run and we run them afterwards. It's | |
4431 | simpler, especially since all the code was already there. -stef */ | |
4432 | ||
a615c6dc | 4433 | if (!after) |
173f2a64 | 4434 | { |
a615c6dc SM |
4435 | /* We are being called before a change. |
4436 | Scan the overlays to find the functions to call. */ | |
4437 | last_overlay_modification_hooks_used = 0; | |
fd318b54 | 4438 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
173f2a64 | 4439 | { |
d311d28c | 4440 | ptrdiff_t startpos, endpos; |
a615c6dc SM |
4441 | Lisp_Object ostart, oend; |
4442 | ||
2410d73a | 4443 | XSETMISC (overlay, tail); |
a615c6dc SM |
4444 | |
4445 | ostart = OVERLAY_START (overlay); | |
4446 | oend = OVERLAY_END (overlay); | |
4447 | endpos = OVERLAY_POSITION (oend); | |
4448 | if (XFASTINT (start) > endpos) | |
4449 | break; | |
4450 | startpos = OVERLAY_POSITION (ostart); | |
4451 | if (insertion && (XFASTINT (start) == startpos | |
4452 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4453 | { |
a615c6dc SM |
4454 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4455 | if (!NILP (prop)) | |
4456 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4457 | } |
a615c6dc SM |
4458 | if (insertion && (XFASTINT (start) == endpos |
4459 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4460 | { |
a615c6dc SM |
4461 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4462 | if (!NILP (prop)) | |
4463 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4464 | } |
a615c6dc SM |
4465 | /* Test for intersecting intervals. This does the right thing |
4466 | for both insertion and deletion. */ | |
4467 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4468 | { |
a615c6dc SM |
4469 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4470 | if (!NILP (prop)) | |
4471 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4472 | } |
173f2a64 | 4473 | } |
60ebfdf3 | 4474 | |
fd318b54 | 4475 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
173f2a64 | 4476 | { |
d311d28c | 4477 | ptrdiff_t startpos, endpos; |
a615c6dc SM |
4478 | Lisp_Object ostart, oend; |
4479 | ||
2410d73a | 4480 | XSETMISC (overlay, tail); |
a615c6dc SM |
4481 | |
4482 | ostart = OVERLAY_START (overlay); | |
4483 | oend = OVERLAY_END (overlay); | |
4484 | startpos = OVERLAY_POSITION (ostart); | |
4485 | endpos = OVERLAY_POSITION (oend); | |
4486 | if (XFASTINT (end) < startpos) | |
4487 | break; | |
4488 | if (insertion && (XFASTINT (start) == startpos | |
4489 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4490 | { |
a615c6dc SM |
4491 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4492 | if (!NILP (prop)) | |
4493 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4494 | } |
a615c6dc SM |
4495 | if (insertion && (XFASTINT (start) == endpos |
4496 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4497 | { |
a615c6dc SM |
4498 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4499 | if (!NILP (prop)) | |
4500 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4501 | } |
a615c6dc SM |
4502 | /* Test for intersecting intervals. This does the right thing |
4503 | for both insertion and deletion. */ | |
4504 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4505 | { |
a615c6dc SM |
4506 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4507 | if (!NILP (prop)) | |
4508 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4509 | } |
173f2a64 RS |
4510 | } |
4511 | } | |
55b48893 | 4512 | |
a615c6dc SM |
4513 | GCPRO4 (overlay, arg1, arg2, arg3); |
4514 | { | |
4515 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4516 | First copy the vector contents, in case some of these hooks | |
4517 | do subsequent modification of the buffer. */ | |
d311d28c | 4518 | ptrdiff_t size = last_overlay_modification_hooks_used; |
38182d90 | 4519 | Lisp_Object *copy = alloca (size * sizeof *copy); |
d311d28c | 4520 | ptrdiff_t i; |
a615c6dc | 4521 | |
91f2d272 | 4522 | memcpy (copy, XVECTOR (last_overlay_modification_hooks)->contents, |
663e2b3f | 4523 | size * word_size); |
a615c6dc SM |
4524 | gcpro1.var = copy; |
4525 | gcpro1.nvars = size; | |
4526 | ||
4527 | for (i = 0; i < size;) | |
4528 | { | |
8f54f30a PE |
4529 | Lisp_Object prop_i, overlay_i; |
4530 | prop_i = copy[i++]; | |
4531 | overlay_i = copy[i++]; | |
4532 | call_overlay_mod_hooks (prop_i, overlay_i, after, arg1, arg2, arg3); | |
a615c6dc SM |
4533 | } |
4534 | } | |
55b48893 | 4535 | UNGCPRO; |
173f2a64 RS |
4536 | } |
4537 | ||
4538 | static void | |
37ef52bb | 4539 | call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, bool after, |
d3da34e0 | 4540 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) |
173f2a64 | 4541 | { |
930a9140 | 4542 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4543 | |
930a9140 | 4544 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4545 | |
6d70a280 | 4546 | while (CONSP (list)) |
173f2a64 | 4547 | { |
930a9140 | 4548 | if (NILP (arg3)) |
6d70a280 | 4549 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4550 | else |
6d70a280 SM |
4551 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4552 | list = XCDR (list); | |
173f2a64 RS |
4553 | } |
4554 | UNGCPRO; | |
4555 | } | |
9d7608b7 KH |
4556 | |
4557 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4558 | property is set. */ | |
4559 | void | |
d311d28c | 4560 | evaporate_overlays (ptrdiff_t pos) |
9d7608b7 | 4561 | { |
2410d73a SM |
4562 | Lisp_Object overlay, hit_list; |
4563 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4564 | |
4565 | hit_list = Qnil; | |
c2d5b10f | 4566 | if (pos <= current_buffer->overlay_center) |
fd318b54 | 4567 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
9d7608b7 | 4568 | { |
d311d28c | 4569 | ptrdiff_t endpos; |
2410d73a | 4570 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4571 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4572 | if (endpos < pos) | |
4573 | break; | |
4574 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4575 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4576 | hit_list = Fcons (overlay, hit_list); |
4577 | } | |
4578 | else | |
fd318b54 | 4579 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
9d7608b7 | 4580 | { |
d311d28c | 4581 | ptrdiff_t startpos; |
2410d73a | 4582 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4583 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4584 | if (startpos > pos) | |
4585 | break; | |
4586 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4587 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4588 | hit_list = Fcons (overlay, hit_list); |
4589 | } | |
7539e11f KR |
4590 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4591 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4592 | } |
1bf08baf | 4593 | |
b86af064 GM |
4594 | /*********************************************************************** |
4595 | Allocation with mmap | |
4596 | ***********************************************************************/ | |
4597 | ||
4598 | #ifdef USE_MMAP_FOR_BUFFERS | |
4599 | ||
b86af064 GM |
4600 | #include <sys/mman.h> |
4601 | ||
4602 | #ifndef MAP_ANON | |
4603 | #ifdef MAP_ANONYMOUS | |
4604 | #define MAP_ANON MAP_ANONYMOUS | |
4605 | #else | |
4606 | #define MAP_ANON 0 | |
4607 | #endif | |
4608 | #endif | |
4609 | ||
09dfdf85 GM |
4610 | #ifndef MAP_FAILED |
4611 | #define MAP_FAILED ((void *) -1) | |
4612 | #endif | |
4613 | ||
b86af064 GM |
4614 | #if MAP_ANON == 0 |
4615 | #include <fcntl.h> | |
4616 | #endif | |
4617 | ||
4618 | #include "coding.h" | |
4619 | ||
4620 | ||
4621 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4622 | The current implementation lets the system select mapped | |
4623 | addresses; we're not using MAP_FIXED in general, except when | |
4624 | trying to enlarge regions. | |
4625 | ||
4626 | Each mapped region starts with a mmap_region structure, the user | |
4627 | area starts after that structure, aligned to MEM_ALIGN. | |
4628 | ||
4629 | +-----------------------+ | |
4630 | | struct mmap_info + | | |
4631 | | padding | | |
4632 | +-----------------------+ | |
4633 | | user data | | |
4634 | | | | |
4635 | | | | |
4636 | +-----------------------+ */ | |
4637 | ||
4638 | struct mmap_region | |
4639 | { | |
4640 | /* User-specified size. */ | |
4641 | size_t nbytes_specified; | |
177c0ea7 | 4642 | |
b86af064 GM |
4643 | /* Number of bytes mapped */ |
4644 | size_t nbytes_mapped; | |
4645 | ||
4646 | /* Pointer to the location holding the address of the memory | |
4647 | allocated with the mmap'd block. The variable actually points | |
4648 | after this structure. */ | |
261cb4bb | 4649 | void **var; |
b86af064 GM |
4650 | |
4651 | /* Next and previous in list of all mmap'd regions. */ | |
4652 | struct mmap_region *next, *prev; | |
4653 | }; | |
4654 | ||
4655 | /* Doubly-linked list of mmap'd regions. */ | |
4656 | ||
4657 | static struct mmap_region *mmap_regions; | |
4658 | ||
4659 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4660 | /dev/zero will be opened on it. */ | |
4661 | ||
4662 | static int mmap_fd; | |
4663 | ||
4664 | /* Temporary storage for mmap_set_vars, see there. */ | |
4665 | ||
4666 | static struct mmap_region *mmap_regions_1; | |
4667 | static int mmap_fd_1; | |
4668 | ||
4669 | /* Page size on this system. */ | |
4670 | ||
4671 | static int mmap_page_size; | |
4672 | ||
cd1181db | 4673 | /* 1 means mmap has been initialized. */ |
b86af064 | 4674 | |
37ef52bb | 4675 | static bool mmap_initialized_p; |
b86af064 GM |
4676 | |
4677 | /* Value is X rounded up to the next multiple of N. */ | |
4678 | ||
4679 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4680 | ||
4681 | /* Size of mmap_region structure plus padding. */ | |
4682 | ||
4683 | #define MMAP_REGION_STRUCT_SIZE \ | |
4684 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4685 | ||
4686 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4687 | region, return a pointer to the start of the region. */ | |
4688 | ||
4689 | #define MMAP_REGION(P) \ | |
4690 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4691 | ||
4692 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4693 | to the start of the user-visible part of the region. */ | |
4694 | ||
4695 | #define MMAP_USER_AREA(P) \ | |
261cb4bb | 4696 | ((void *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) |
b86af064 GM |
4697 | |
4698 | #define MEM_ALIGN sizeof (double) | |
4699 | ||
7273faa1 DL |
4700 | /* Predicate returning true if part of the address range [START .. END] |
4701 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4702 | memory mapping. |
4703 | ||
da6062e6 | 4704 | Default is to conservatively assume the address range is occupied by |
08327b22 GM |
4705 | something else. This can be overridden by system configuration |
4706 | files if system-specific means to determine this exists. */ | |
4707 | ||
4708 | #ifndef MMAP_ALLOCATED_P | |
4709 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4710 | #endif | |
4711 | ||
53964682 | 4712 | /* Perform necessary initializations for the use of mmap. */ |
b86af064 | 4713 | |
1dae0f0a AS |
4714 | static void |
4715 | mmap_init (void) | |
4716 | { | |
4717 | #if MAP_ANON == 0 | |
4718 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4719 | in a dumped Emacs. */ | |
4720 | if (mmap_fd <= 0) | |
4721 | { | |
4722 | /* No anonymous mmap -- we need the file descriptor. */ | |
406af475 | 4723 | mmap_fd = emacs_open ("/dev/zero", O_RDONLY, 0); |
1dae0f0a AS |
4724 | if (mmap_fd == -1) |
4725 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4726 | } | |
4727 | #endif /* MAP_ANON == 0 */ | |
4728 | ||
4729 | if (mmap_initialized_p) | |
4730 | return; | |
4731 | mmap_initialized_p = 1; | |
b86af064 | 4732 | |
1dae0f0a AS |
4733 | #if MAP_ANON != 0 |
4734 | mmap_fd = -1; | |
4735 | #endif | |
4736 | ||
4737 | mmap_page_size = getpagesize (); | |
4738 | } | |
b86af064 GM |
4739 | |
4740 | /* Return a region overlapping address range START...END, or null if | |
4741 | none. END is not including, i.e. the last byte in the range | |
4742 | is at END - 1. */ | |
4743 | ||
4744 | static struct mmap_region * | |
261cb4bb | 4745 | mmap_find (void *start, void *end) |
b86af064 GM |
4746 | { |
4747 | struct mmap_region *r; | |
7d652d97 | 4748 | char *s = start, *e = end; |
177c0ea7 | 4749 | |
b86af064 GM |
4750 | for (r = mmap_regions; r; r = r->next) |
4751 | { | |
4752 | char *rstart = (char *) r; | |
4753 | char *rend = rstart + r->nbytes_mapped; | |
4754 | ||
4755 | if (/* First byte of range, i.e. START, in this region? */ | |
4756 | (s >= rstart && s < rend) | |
4757 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4758 | || (e > rstart && e <= rend) | |
4759 | /* First byte of this region in the range? */ | |
4760 | || (rstart >= s && rstart < e) | |
4761 | /* Last byte of this region in the range? */ | |
4762 | || (rend > s && rend <= e)) | |
4763 | break; | |
4764 | } | |
4765 | ||
4766 | return r; | |
4767 | } | |
4768 | ||
4769 | ||
4770 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
37ef52bb | 4771 | the region. */ |
b86af064 | 4772 | |
37ef52bb | 4773 | static void |
1dae0f0a | 4774 | mmap_free_1 (struct mmap_region *r) |
b86af064 GM |
4775 | { |
4776 | if (r->next) | |
4777 | r->next->prev = r->prev; | |
4778 | if (r->prev) | |
4779 | r->prev->next = r->next; | |
4780 | else | |
4781 | mmap_regions = r->next; | |
177c0ea7 | 4782 | |
261cb4bb | 4783 | if (munmap (r, r->nbytes_mapped) == -1) |
37ef52bb | 4784 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); |
b86af064 GM |
4785 | } |
4786 | ||
4787 | ||
4788 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
37ef52bb | 4789 | Value is true if successful. */ |
b86af064 | 4790 | |
37ef52bb | 4791 | static bool |
1dae0f0a | 4792 | mmap_enlarge (struct mmap_region *r, int npages) |
b86af064 GM |
4793 | { |
4794 | char *region_end = (char *) r + r->nbytes_mapped; | |
4795 | size_t nbytes; | |
37ef52bb | 4796 | bool success = 0; |
b86af064 GM |
4797 | |
4798 | if (npages < 0) | |
4799 | { | |
4800 | /* Unmap pages at the end of the region. */ | |
4801 | nbytes = - npages * mmap_page_size; | |
4802 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4803 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4804 | else | |
4805 | { | |
4806 | r->nbytes_mapped -= nbytes; | |
4807 | success = 1; | |
4808 | } | |
4809 | } | |
4810 | else if (npages > 0) | |
4811 | { | |
b86af064 | 4812 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4813 | |
b86af064 GM |
4814 | /* Try to map additional pages at the end of the region. We |
4815 | cannot do this if the address range is already occupied by | |
4816 | something else because mmap deletes any previous mapping. | |
4817 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4818 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 | 4819 | { |
261cb4bb | 4820 | void *p; |
177c0ea7 | 4821 | |
b86af064 GM |
4822 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4823 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4824 | if (p == MAP_FAILED) | |
edaa9aed | 4825 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
261cb4bb | 4826 | else if (p != region_end) |
b86af064 GM |
4827 | { |
4828 | /* Kernels are free to choose a different address. In | |
4829 | that case, unmap what we've mapped above; we have | |
4830 | no use for it. */ | |
4831 | if (munmap (p, nbytes) == -1) | |
4832 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4833 | } | |
4834 | else | |
4835 | { | |
4836 | r->nbytes_mapped += nbytes; | |
4837 | success = 1; | |
4838 | } | |
4839 | } | |
4840 | } | |
4841 | ||
4842 | return success; | |
4843 | } | |
4844 | ||
4845 | ||
37ef52bb PE |
4846 | /* Set or reset variables holding references to mapped regions. |
4847 | If not RESTORE_P, set all variables to null. If RESTORE_P, set all | |
4848 | variables to the start of the user-areas of mapped regions. | |
b86af064 GM |
4849 | |
4850 | This function is called from Fdump_emacs to ensure that the dumped | |
4851 | Emacs doesn't contain references to memory that won't be mapped | |
4852 | when Emacs starts. */ | |
4853 | ||
4854 | void | |
37ef52bb | 4855 | mmap_set_vars (bool restore_p) |
b86af064 GM |
4856 | { |
4857 | struct mmap_region *r; | |
4858 | ||
4859 | if (restore_p) | |
4860 | { | |
4861 | mmap_regions = mmap_regions_1; | |
4862 | mmap_fd = mmap_fd_1; | |
4863 | for (r = mmap_regions; r; r = r->next) | |
4864 | *r->var = MMAP_USER_AREA (r); | |
4865 | } | |
4866 | else | |
4867 | { | |
4868 | for (r = mmap_regions; r; r = r->next) | |
4869 | *r->var = NULL; | |
4870 | mmap_regions_1 = mmap_regions; | |
4871 | mmap_regions = NULL; | |
4872 | mmap_fd_1 = mmap_fd; | |
4873 | mmap_fd = -1; | |
4874 | } | |
4875 | } | |
4876 | ||
4877 | ||
4878 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4879 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4880 | address of some variable which will use the data area. | |
4881 | ||
4882 | The allocation of 0 bytes is valid. | |
4883 | ||
4884 | If we can't allocate the necessary memory, set *VAR to null, and | |
4885 | return null. */ | |
4886 | ||
261cb4bb PE |
4887 | static void * |
4888 | mmap_alloc (void **var, size_t nbytes) | |
b86af064 GM |
4889 | { |
4890 | void *p; | |
4891 | size_t map; | |
4892 | ||
4893 | mmap_init (); | |
4894 | ||
4895 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4896 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4897 | mmap_fd, 0); | |
177c0ea7 | 4898 | |
b86af064 GM |
4899 | if (p == MAP_FAILED) |
4900 | { | |
4901 | if (errno != ENOMEM) | |
4902 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4903 | p = NULL; | |
4904 | } | |
4905 | else | |
4906 | { | |
7d652d97 | 4907 | struct mmap_region *r = p; |
177c0ea7 | 4908 | |
b86af064 GM |
4909 | r->nbytes_specified = nbytes; |
4910 | r->nbytes_mapped = map; | |
4911 | r->var = var; | |
4912 | r->prev = NULL; | |
4913 | r->next = mmap_regions; | |
4914 | if (r->next) | |
4915 | r->next->prev = r; | |
4916 | mmap_regions = r; | |
177c0ea7 | 4917 | |
b86af064 GM |
4918 | p = MMAP_USER_AREA (p); |
4919 | } | |
177c0ea7 | 4920 | |
b86af064 GM |
4921 | return *var = p; |
4922 | } | |
4923 | ||
4924 | ||
1dae0f0a AS |
4925 | /* Free a block of relocatable storage whose data is pointed to by |
4926 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4927 | ||
4928 | static void | |
261cb4bb | 4929 | mmap_free (void **var) |
1dae0f0a AS |
4930 | { |
4931 | mmap_init (); | |
4932 | ||
4933 | if (*var) | |
4934 | { | |
4935 | mmap_free_1 (MMAP_REGION (*var)); | |
4936 | *var = NULL; | |
4937 | } | |
4938 | } | |
4939 | ||
4940 | ||
b86af064 GM |
4941 | /* Given a pointer at address VAR to data allocated with mmap_alloc, |
4942 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4943 | and return this value. If more memory cannot be allocated, then | |
4944 | leave *VAR unchanged, and return null. */ | |
4945 | ||
261cb4bb PE |
4946 | static void * |
4947 | mmap_realloc (void **var, size_t nbytes) | |
b86af064 | 4948 | { |
261cb4bb | 4949 | void *result; |
177c0ea7 | 4950 | |
b86af064 GM |
4951 | mmap_init (); |
4952 | ||
4953 | if (*var == NULL) | |
4954 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4955 | else if (nbytes == 0) |
b86af064 GM |
4956 | { |
4957 | mmap_free (var); | |
4958 | result = mmap_alloc (var, nbytes); | |
4959 | } | |
4960 | else | |
4961 | { | |
4962 | struct mmap_region *r = MMAP_REGION (*var); | |
4963 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4964 | |
b86af064 GM |
4965 | if (room < nbytes) |
4966 | { | |
4967 | /* Must enlarge. */ | |
261cb4bb | 4968 | void *old_ptr = *var; |
b86af064 GM |
4969 | |
4970 | /* Try to map additional pages at the end of the region. | |
4971 | If that fails, allocate a new region, copy data | |
4972 | from the old region, then free it. */ | |
4973 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4974 | / mmap_page_size))) | |
4975 | { | |
4976 | r->nbytes_specified = nbytes; | |
4977 | *var = result = old_ptr; | |
4978 | } | |
4979 | else if (mmap_alloc (var, nbytes)) | |
4980 | { | |
72af86bd | 4981 | memcpy (*var, old_ptr, r->nbytes_specified); |
b86af064 GM |
4982 | mmap_free_1 (MMAP_REGION (old_ptr)); |
4983 | result = *var; | |
4984 | r = MMAP_REGION (result); | |
4985 | r->nbytes_specified = nbytes; | |
4986 | } | |
4987 | else | |
4988 | { | |
4989 | *var = old_ptr; | |
4990 | result = NULL; | |
4991 | } | |
4992 | } | |
4993 | else if (room - nbytes >= mmap_page_size) | |
4994 | { | |
4995 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4996 | memory back to the system. |
4997 | ||
4998 | The extra parens are to make the division happens first, | |
4999 | on positive values, so we know it will round towards | |
5000 | zero. */ | |
bb63c5c9 | 5001 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
5002 | result = *var; |
5003 | r->nbytes_specified = nbytes; | |
5004 | } | |
5005 | else | |
5006 | { | |
5007 | /* Leave it alone. */ | |
5008 | result = *var; | |
5009 | r->nbytes_specified = nbytes; | |
5010 | } | |
5011 | } | |
5012 | ||
5013 | return result; | |
5014 | } | |
5015 | ||
5016 | ||
b86af064 GM |
5017 | #endif /* USE_MMAP_FOR_BUFFERS */ |
5018 | ||
5019 | ||
5020 | \f | |
5021 | /*********************************************************************** | |
5022 | Buffer-text Allocation | |
5023 | ***********************************************************************/ | |
5024 | ||
b86af064 GM |
5025 | /* Allocate NBYTES bytes for buffer B's text buffer. */ |
5026 | ||
5027 | static void | |
fd05c7e9 | 5028 | alloc_buffer_text (struct buffer *b, ptrdiff_t nbytes) |
b86af064 | 5029 | { |
261cb4bb | 5030 | void *p; |
177c0ea7 | 5031 | |
4d7e6e51 | 5032 | block_input (); |
b86af064 | 5033 | #if defined USE_MMAP_FOR_BUFFERS |
261cb4bb | 5034 | p = mmap_alloc ((void **) &b->text->beg, nbytes); |
b86af064 | 5035 | #elif defined REL_ALLOC |
261cb4bb | 5036 | p = r_alloc ((void **) &b->text->beg, nbytes); |
b86af064 | 5037 | #else |
815add84 | 5038 | p = xmalloc (nbytes); |
b86af064 | 5039 | #endif |
177c0ea7 | 5040 | |
b86af064 GM |
5041 | if (p == NULL) |
5042 | { | |
4d7e6e51 | 5043 | unblock_input (); |
531b0165 | 5044 | memory_full (nbytes); |
b86af064 GM |
5045 | } |
5046 | ||
7d652d97 | 5047 | b->text->beg = p; |
4d7e6e51 | 5048 | unblock_input (); |
b86af064 GM |
5049 | } |
5050 | ||
5051 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
5052 | shrink it. */ | |
5053 | ||
5054 | void | |
d311d28c | 5055 | enlarge_buffer_text (struct buffer *b, ptrdiff_t delta) |
b86af064 | 5056 | { |
261cb4bb | 5057 | void *p; |
fd05c7e9 PE |
5058 | ptrdiff_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 |
5059 | + delta); | |
4d7e6e51 | 5060 | block_input (); |
b86af064 | 5061 | #if defined USE_MMAP_FOR_BUFFERS |
261cb4bb | 5062 | p = mmap_realloc ((void **) &b->text->beg, nbytes); |
b86af064 | 5063 | #elif defined REL_ALLOC |
261cb4bb | 5064 | p = r_re_alloc ((void **) &b->text->beg, nbytes); |
b86af064 GM |
5065 | #else |
5066 | p = xrealloc (b->text->beg, nbytes); | |
5067 | #endif | |
177c0ea7 | 5068 | |
b86af064 GM |
5069 | if (p == NULL) |
5070 | { | |
4d7e6e51 | 5071 | unblock_input (); |
531b0165 | 5072 | memory_full (nbytes); |
b86af064 GM |
5073 | } |
5074 | ||
7d652d97 | 5075 | BUF_BEG_ADDR (b) = p; |
4d7e6e51 | 5076 | unblock_input (); |
b86af064 GM |
5077 | } |
5078 | ||
5079 | ||
5080 | /* Free buffer B's text buffer. */ | |
5081 | ||
5082 | static void | |
d3da34e0 | 5083 | free_buffer_text (struct buffer *b) |
b86af064 | 5084 | { |
4d7e6e51 | 5085 | block_input (); |
b86af064 GM |
5086 | |
5087 | #if defined USE_MMAP_FOR_BUFFERS | |
261cb4bb | 5088 | mmap_free ((void **) &b->text->beg); |
b86af064 | 5089 | #elif defined REL_ALLOC |
261cb4bb | 5090 | r_alloc_free ((void **) &b->text->beg); |
b86af064 GM |
5091 | #else |
5092 | xfree (b->text->beg); | |
5093 | #endif | |
177c0ea7 | 5094 | |
b86af064 | 5095 | BUF_BEG_ADDR (b) = NULL; |
4d7e6e51 | 5096 | unblock_input (); |
b86af064 GM |
5097 | } |
5098 | ||
5099 | ||
5100 | \f | |
5101 | /*********************************************************************** | |
5102 | Initialization | |
5103 | ***********************************************************************/ | |
5104 | ||
dfcf069d | 5105 | void |
d3da34e0 | 5106 | init_buffer_once (void) |
1ab256cb | 5107 | { |
7c02e886 GM |
5108 | int idx; |
5109 | ||
72af86bd | 5110 | memset (buffer_permanent_local_flags, 0, sizeof buffer_permanent_local_flags); |
13de9290 | 5111 | |
1ab256cb RM |
5112 | /* Make sure all markable slots in buffer_defaults |
5113 | are initialized reasonably, so mark_buffer won't choke. */ | |
5114 | reset_buffer (&buffer_defaults); | |
4b4deea2 | 5115 | eassert (EQ (BVAR (&buffer_defaults, name), make_number (0))); |
13de9290 | 5116 | reset_buffer_local_variables (&buffer_defaults, 1); |
4b4deea2 | 5117 | eassert (EQ (BVAR (&buffer_local_symbols, name), make_number (0))); |
1ab256cb | 5118 | reset_buffer (&buffer_local_symbols); |
13de9290 | 5119 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
5120 | /* Prevent GC from getting confused. */ |
5121 | buffer_defaults.text = &buffer_defaults.own_text; | |
5122 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
04e9897c DA |
5123 | /* No one will share the text with these buffers, but let's play it safe. */ |
5124 | buffer_defaults.indirections = 0; | |
5125 | buffer_local_symbols.indirections = 0; | |
98a07056 DA |
5126 | /* Likewise no one will display them. */ |
5127 | buffer_defaults.window_count = 0; | |
5128 | buffer_local_symbols.window_count = 0; | |
0c94c8d6 PE |
5129 | set_buffer_intervals (&buffer_defaults, NULL); |
5130 | set_buffer_intervals (&buffer_local_symbols, NULL); | |
c752cfa9 DA |
5131 | /* This is not strictly necessary, but let's make them initialized. */ |
5132 | bset_name (&buffer_defaults, build_pure_c_string (" *buffer-defaults*")); | |
5133 | bset_name (&buffer_local_symbols, build_pure_c_string (" *buffer-local-symbols*")); | |
914adc42 DA |
5134 | BUFFER_PVEC_INIT (&buffer_defaults); |
5135 | BUFFER_PVEC_INIT (&buffer_local_symbols); | |
1ab256cb RM |
5136 | |
5137 | /* Set up the default values of various buffer slots. */ | |
5138 | /* Must do these before making the first buffer! */ | |
5139 | ||
f532dca0 | 5140 | /* real setup is done in bindings.el */ |
39eb03f1 PE |
5141 | bset_mode_line_format (&buffer_defaults, build_pure_c_string ("%-")); |
5142 | bset_header_line_format (&buffer_defaults, Qnil); | |
5143 | bset_abbrev_mode (&buffer_defaults, Qnil); | |
5144 | bset_overwrite_mode (&buffer_defaults, Qnil); | |
5145 | bset_case_fold_search (&buffer_defaults, Qt); | |
5146 | bset_auto_fill_function (&buffer_defaults, Qnil); | |
5147 | bset_selective_display (&buffer_defaults, Qnil); | |
5148 | bset_selective_display_ellipses (&buffer_defaults, Qt); | |
5149 | bset_abbrev_table (&buffer_defaults, Qnil); | |
5150 | bset_display_table (&buffer_defaults, Qnil); | |
5151 | bset_undo_list (&buffer_defaults, Qnil); | |
5152 | bset_mark_active (&buffer_defaults, Qnil); | |
5153 | bset_file_format (&buffer_defaults, Qnil); | |
5154 | bset_auto_save_file_format (&buffer_defaults, Qt); | |
0c94c8d6 PE |
5155 | set_buffer_overlays_before (&buffer_defaults, NULL); |
5156 | set_buffer_overlays_after (&buffer_defaults, NULL); | |
c2d5b10f | 5157 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 5158 | |
4b4deea2 | 5159 | XSETFASTINT (BVAR (&buffer_defaults, tab_width), 8); |
39eb03f1 PE |
5160 | bset_truncate_lines (&buffer_defaults, Qnil); |
5161 | bset_word_wrap (&buffer_defaults, Qnil); | |
5162 | bset_ctl_arrow (&buffer_defaults, Qt); | |
5163 | bset_bidi_display_reordering (&buffer_defaults, Qt); | |
5164 | bset_bidi_paragraph_direction (&buffer_defaults, Qnil); | |
5165 | bset_cursor_type (&buffer_defaults, Qt); | |
5166 | bset_extra_line_spacing (&buffer_defaults, Qnil); | |
5167 | bset_cursor_in_non_selected_windows (&buffer_defaults, Qt); | |
5168 | ||
5169 | bset_enable_multibyte_characters (&buffer_defaults, Qt); | |
5170 | bset_buffer_file_coding_system (&buffer_defaults, Qnil); | |
4b4deea2 TT |
5171 | XSETFASTINT (BVAR (&buffer_defaults, fill_column), 70); |
5172 | XSETFASTINT (BVAR (&buffer_defaults, left_margin), 0); | |
080db47f | 5173 | bset_cache_long_scans (&buffer_defaults, Qt); |
39eb03f1 | 5174 | bset_file_truename (&buffer_defaults, Qnil); |
4b4deea2 TT |
5175 | XSETFASTINT (BVAR (&buffer_defaults, display_count), 0); |
5176 | XSETFASTINT (BVAR (&buffer_defaults, left_margin_cols), 0); | |
5177 | XSETFASTINT (BVAR (&buffer_defaults, right_margin_cols), 0); | |
39eb03f1 PE |
5178 | bset_left_fringe_width (&buffer_defaults, Qnil); |
5179 | bset_right_fringe_width (&buffer_defaults, Qnil); | |
5180 | bset_fringes_outside_margins (&buffer_defaults, Qnil); | |
5181 | bset_scroll_bar_width (&buffer_defaults, Qnil); | |
5182 | bset_vertical_scroll_bar_type (&buffer_defaults, Qt); | |
5183 | bset_indicate_empty_lines (&buffer_defaults, Qnil); | |
5184 | bset_indicate_buffer_boundaries (&buffer_defaults, Qnil); | |
5185 | bset_fringe_indicator_alist (&buffer_defaults, Qnil); | |
5186 | bset_fringe_cursor_alist (&buffer_defaults, Qnil); | |
5187 | bset_scroll_up_aggressively (&buffer_defaults, Qnil); | |
5188 | bset_scroll_down_aggressively (&buffer_defaults, Qnil); | |
5189 | bset_display_time (&buffer_defaults, Qnil); | |
1ab256cb RM |
5190 | |
5191 | /* Assign the local-flags to the slots that have default values. | |
5192 | The local flag is a bit that is used in the buffer | |
5193 | to say that it has its own local value for the slot. | |
5194 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
5195 | ||
5196 | /* Nothing can work if this isn't true */ | |
663e2b3f | 5197 | { verify (sizeof (EMACS_INT) == word_size); } |
1ab256cb RM |
5198 | |
5199 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
72af86bd | 5200 | memset (&buffer_local_flags, 0, sizeof buffer_local_flags); |
39eb03f1 PE |
5201 | bset_filename (&buffer_local_flags, make_number (-1)); |
5202 | bset_directory (&buffer_local_flags, make_number (-1)); | |
5203 | bset_backed_up (&buffer_local_flags, make_number (-1)); | |
5204 | bset_save_length (&buffer_local_flags, make_number (-1)); | |
5205 | bset_auto_save_file_name (&buffer_local_flags, make_number (-1)); | |
5206 | bset_read_only (&buffer_local_flags, make_number (-1)); | |
5207 | bset_major_mode (&buffer_local_flags, make_number (-1)); | |
5208 | bset_mode_name (&buffer_local_flags, make_number (-1)); | |
5209 | bset_undo_list (&buffer_local_flags, make_number (-1)); | |
5210 | bset_mark_active (&buffer_local_flags, make_number (-1)); | |
5211 | bset_point_before_scroll (&buffer_local_flags, make_number (-1)); | |
5212 | bset_file_truename (&buffer_local_flags, make_number (-1)); | |
5213 | bset_invisibility_spec (&buffer_local_flags, make_number (-1)); | |
5214 | bset_file_format (&buffer_local_flags, make_number (-1)); | |
5215 | bset_auto_save_file_format (&buffer_local_flags, make_number (-1)); | |
5216 | bset_display_count (&buffer_local_flags, make_number (-1)); | |
5217 | bset_display_time (&buffer_local_flags, make_number (-1)); | |
5218 | bset_enable_multibyte_characters (&buffer_local_flags, make_number (-1)); | |
8d7a4592 | 5219 | |
7c02e886 | 5220 | idx = 1; |
4b4deea2 TT |
5221 | XSETFASTINT (BVAR (&buffer_local_flags, mode_line_format), idx); ++idx; |
5222 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_mode), idx); ++idx; | |
5223 | XSETFASTINT (BVAR (&buffer_local_flags, overwrite_mode), idx); ++idx; | |
5224 | XSETFASTINT (BVAR (&buffer_local_flags, case_fold_search), idx); ++idx; | |
5225 | XSETFASTINT (BVAR (&buffer_local_flags, auto_fill_function), idx); ++idx; | |
5226 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display), idx); ++idx; | |
4b4deea2 | 5227 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display_ellipses), idx); ++idx; |
4b4deea2 TT |
5228 | XSETFASTINT (BVAR (&buffer_local_flags, tab_width), idx); ++idx; |
5229 | XSETFASTINT (BVAR (&buffer_local_flags, truncate_lines), idx); ++idx; | |
5230 | XSETFASTINT (BVAR (&buffer_local_flags, word_wrap), idx); ++idx; | |
5231 | XSETFASTINT (BVAR (&buffer_local_flags, ctl_arrow), idx); ++idx; | |
5232 | XSETFASTINT (BVAR (&buffer_local_flags, fill_column), idx); ++idx; | |
5233 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin), idx); ++idx; | |
5234 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_table), idx); ++idx; | |
5235 | XSETFASTINT (BVAR (&buffer_local_flags, display_table), idx); ++idx; | |
4b4deea2 | 5236 | XSETFASTINT (BVAR (&buffer_local_flags, syntax_table), idx); ++idx; |
e30b79c1 | 5237 | XSETFASTINT (BVAR (&buffer_local_flags, cache_long_scans), idx); ++idx; |
4b4deea2 TT |
5238 | XSETFASTINT (BVAR (&buffer_local_flags, category_table), idx); ++idx; |
5239 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_display_reordering), idx); ++idx; | |
5240 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_paragraph_direction), idx); ++idx; | |
5241 | XSETFASTINT (BVAR (&buffer_local_flags, buffer_file_coding_system), idx); | |
a1a17b61 | 5242 | /* Make this one a permanent local. */ |
7c02e886 | 5243 | buffer_permanent_local_flags[idx++] = 1; |
4b4deea2 TT |
5244 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin_cols), idx); ++idx; |
5245 | XSETFASTINT (BVAR (&buffer_local_flags, right_margin_cols), idx); ++idx; | |
5246 | XSETFASTINT (BVAR (&buffer_local_flags, left_fringe_width), idx); ++idx; | |
5247 | XSETFASTINT (BVAR (&buffer_local_flags, right_fringe_width), idx); ++idx; | |
5248 | XSETFASTINT (BVAR (&buffer_local_flags, fringes_outside_margins), idx); ++idx; | |
5249 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_bar_width), idx); ++idx; | |
5250 | XSETFASTINT (BVAR (&buffer_local_flags, vertical_scroll_bar_type), idx); ++idx; | |
5251 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_empty_lines), idx); ++idx; | |
5252 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_buffer_boundaries), idx); ++idx; | |
5253 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_indicator_alist), idx); ++idx; | |
5254 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_cursor_alist), idx); ++idx; | |
5255 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_up_aggressively), idx); ++idx; | |
5256 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_down_aggressively), idx); ++idx; | |
5257 | XSETFASTINT (BVAR (&buffer_local_flags, header_line_format), idx); ++idx; | |
5258 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_type), idx); ++idx; | |
5259 | XSETFASTINT (BVAR (&buffer_local_flags, extra_line_spacing), idx); ++idx; | |
5260 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_in_non_selected_windows), idx); ++idx; | |
7c02e886 GM |
5261 | |
5262 | /* Need more room? */ | |
7313acd0 | 5263 | if (idx >= MAX_PER_BUFFER_VARS) |
1088b922 | 5264 | emacs_abort (); |
7313acd0 | 5265 | last_per_buffer_idx = idx; |
177c0ea7 | 5266 | |
1ab256cb RM |
5267 | Vbuffer_alist = Qnil; |
5268 | current_buffer = 0; | |
5269 | all_buffers = 0; | |
5270 | ||
2a0213a6 | 5271 | QSFundamental = build_pure_c_string ("Fundamental"); |
1ab256cb | 5272 | |
d67b4f80 | 5273 | Qfundamental_mode = intern_c_string ("fundamental-mode"); |
39eb03f1 | 5274 | bset_major_mode (&buffer_defaults, Qfundamental_mode); |
1ab256cb | 5275 | |
d67b4f80 | 5276 | Qmode_class = intern_c_string ("mode-class"); |
1ab256cb | 5277 | |
d67b4f80 | 5278 | Qprotected_field = intern_c_string ("protected-field"); |
1ab256cb | 5279 | |
d67b4f80 | 5280 | Qpermanent_local = intern_c_string ("permanent-local"); |
1ab256cb | 5281 | |
d67b4f80 | 5282 | Qkill_buffer_hook = intern_c_string ("kill-buffer-hook"); |
fd6cfe11 | 5283 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5284 | |
1ab256cb | 5285 | /* super-magic invisible buffer */ |
2a0213a6 | 5286 | Vprin1_to_string_buffer = Fget_buffer_create (build_pure_c_string (" prin1")); |
1ab256cb RM |
5287 | Vbuffer_alist = Qnil; |
5288 | ||
2a0213a6 | 5289 | Fset_buffer (Fget_buffer_create (build_pure_c_string ("*scratch*"))); |
7775635d KH |
5290 | |
5291 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5292 | } |
5293 | ||
dfcf069d | 5294 | void |
d3da34e0 | 5295 | init_buffer (void) |
1ab256cb | 5296 | { |
2381d133 | 5297 | char *pwd; |
136351b7 | 5298 | Lisp_Object temp; |
965d34eb | 5299 | ptrdiff_t len; |
1ab256cb | 5300 | |
b86af064 | 5301 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5302 | { |
5303 | /* When using the ralloc implementation based on mmap(2), buffer | |
5304 | text pointers will have been set to null in the dumped Emacs. | |
5305 | Map new memory. */ | |
5306 | struct buffer *b; | |
177c0ea7 | 5307 | |
52b852c7 | 5308 | FOR_EACH_BUFFER (b) |
93c27ef1 | 5309 | if (b->text->beg == NULL) |
b86af064 | 5310 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5311 | } |
b86af064 | 5312 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5313 | |
1ab256cb | 5314 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
4b4deea2 | 5315 | if (NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) |
3d871c85 | 5316 | Fset_buffer_multibyte (Qnil); |
2381d133 | 5317 | |
01537133 | 5318 | pwd = get_current_dir_name (); |
a17b5ed1 | 5319 | |
156bdb41 | 5320 | if (!pwd) |
a17b5ed1 | 5321 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); |
1ab256cb | 5322 | |
1ab256cb RM |
5323 | /* Maybe this should really use some standard subroutine |
5324 | whose definition is filename syntax dependent. */ | |
b639c9be RF |
5325 | len = strlen (pwd); |
5326 | if (!(IS_DIRECTORY_SEP (pwd[len - 1]))) | |
f7975d07 | 5327 | { |
156bdb41 | 5328 | /* Grow buffer to add directory separator and '\0'. */ |
38182d90 | 5329 | pwd = realloc (pwd, len + 2); |
8b146312 AS |
5330 | if (!pwd) |
5331 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); | |
b639c9be RF |
5332 | pwd[len] = DIRECTORY_SEP; |
5333 | pwd[len + 1] = '\0'; | |
cb1caeaf | 5334 | len++; |
f7975d07 | 5335 | } |
0995fa35 | 5336 | |
d0065ff1 EZ |
5337 | /* At this moment, we still don't know how to decode the directory |
5338 | name. So, we keep the bytes in unibyte form so that file I/O | |
5339 | routines correctly get the original bytes. */ | |
39eb03f1 | 5340 | bset_directory (current_buffer, make_unibyte_string (pwd, len)); |
136351b7 | 5341 | |
0995fa35 RS |
5342 | /* Add /: to the front of the name |
5343 | if it would otherwise be treated as magic. */ | |
4b4deea2 | 5344 | temp = Ffind_file_name_handler (BVAR (current_buffer, directory), Qt); |
81ab2e07 KH |
5345 | if (! NILP (temp) |
5346 | /* If the default dir is just /, TEMP is non-nil | |
5347 | because of the ange-ftp completion handler. | |
5348 | However, it is not necessary to turn / into /:/. | |
5349 | So avoid doing that. */ | |
4b4deea2 | 5350 | && strcmp ("/", SSDATA (BVAR (current_buffer, directory)))) |
39eb03f1 PE |
5351 | bset_directory |
5352 | (current_buffer, | |
5353 | concat2 (build_string ("/:"), BVAR (current_buffer, directory))); | |
0995fa35 | 5354 | |
136351b7 | 5355 | temp = get_minibuffer (0); |
39eb03f1 | 5356 | bset_directory (XBUFFER (temp), BVAR (current_buffer, directory)); |
01537133 EZ |
5357 | |
5358 | free (pwd); | |
1ab256cb RM |
5359 | } |
5360 | ||
58cc0a01 DA |
5361 | /* Similar to defvar_lisp but define a variable whose value is the |
5362 | Lisp_Object stored in the current buffer. LNAME is the Lisp-level | |
5363 | variable name. VNAME is the name of the buffer slot. PREDICATE | |
5364 | is nil for a general Lisp variable. If PREDICATE is non-nil, then | |
5365 | only Lisp values that satisfies the PREDICATE are allowed (except | |
5366 | that nil is allowed too). DOC is a dummy where you write the doc | |
5367 | string as a comment. */ | |
5368 | ||
5369 | #define DEFVAR_PER_BUFFER(lname, vname, predicate, doc) \ | |
5370 | do { \ | |
5371 | static struct Lisp_Buffer_Objfwd bo_fwd; \ | |
5372 | defvar_per_buffer (&bo_fwd, lname, vname, predicate); \ | |
ce5b453a | 5373 | } while (0) |
d6aa1876 SM |
5374 | |
5375 | static void | |
8ea90aa3 | 5376 | defvar_per_buffer (struct Lisp_Buffer_Objfwd *bo_fwd, const char *namestring, |
58cc0a01 | 5377 | Lisp_Object *address, Lisp_Object predicate) |
d6aa1876 | 5378 | { |
ce5b453a | 5379 | struct Lisp_Symbol *sym; |
d6aa1876 SM |
5380 | int offset; |
5381 | ||
ce5b453a | 5382 | sym = XSYMBOL (intern (namestring)); |
d6aa1876 SM |
5383 | offset = (char *)address - (char *)current_buffer; |
5384 | ||
ce5b453a SM |
5385 | bo_fwd->type = Lisp_Fwd_Buffer_Obj; |
5386 | bo_fwd->offset = offset; | |
58cc0a01 | 5387 | bo_fwd->predicate = predicate; |
b9598260 | 5388 | sym->declared_special = 1; |
ce5b453a | 5389 | sym->redirect = SYMBOL_FORWARDED; |
7d652d97 | 5390 | SET_SYMBOL_FWD (sym, (union Lisp_Fwd *) bo_fwd); |
ce5b453a | 5391 | XSETSYMBOL (PER_BUFFER_SYMBOL (offset), sym); |
d6aa1876 SM |
5392 | |
5393 | if (PER_BUFFER_IDX (offset) == 0) | |
5394 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding | |
ecda65d4 | 5395 | slot of buffer_local_flags. */ |
1088b922 | 5396 | emacs_abort (); |
d6aa1876 SM |
5397 | } |
5398 | ||
5399 | ||
ecda65d4 | 5400 | /* Initialize the buffer routines. */ |
dfcf069d | 5401 | void |
d3da34e0 | 5402 | syms_of_buffer (void) |
1ab256cb | 5403 | { |
9115729e KH |
5404 | staticpro (&last_overlay_modification_hooks); |
5405 | last_overlay_modification_hooks | |
5406 | = Fmake_vector (make_number (10), Qnil); | |
5407 | ||
1ab256cb RM |
5408 | staticpro (&Qfundamental_mode); |
5409 | staticpro (&Qmode_class); | |
5410 | staticpro (&QSFundamental); | |
5411 | staticpro (&Vbuffer_alist); | |
5412 | staticpro (&Qprotected_field); | |
5413 | staticpro (&Qpermanent_local); | |
5414 | staticpro (&Qkill_buffer_hook); | |
cd3520a4 JB |
5415 | |
5416 | DEFSYM (Qpermanent_local_hook, "permanent-local-hook"); | |
5417 | DEFSYM (Qoverlayp, "overlayp"); | |
5418 | DEFSYM (Qevaporate, "evaporate"); | |
5419 | DEFSYM (Qmodification_hooks, "modification-hooks"); | |
5420 | DEFSYM (Qinsert_in_front_hooks, "insert-in-front-hooks"); | |
5421 | DEFSYM (Qinsert_behind_hooks, "insert-behind-hooks"); | |
5422 | DEFSYM (Qget_file_buffer, "get-file-buffer"); | |
5423 | DEFSYM (Qpriority, "priority"); | |
5424 | DEFSYM (Qbefore_string, "before-string"); | |
5425 | DEFSYM (Qafter_string, "after-string"); | |
5426 | DEFSYM (Qfirst_change_hook, "first-change-hook"); | |
5427 | DEFSYM (Qbefore_change_functions, "before-change-functions"); | |
5428 | DEFSYM (Qafter_change_functions, "after-change-functions"); | |
5429 | DEFSYM (Qkill_buffer_query_functions, "kill-buffer-query-functions"); | |
5430 | ||
1ab256cb | 5431 | Fput (Qprotected_field, Qerror_conditions, |
3438fe21 | 5432 | listn (CONSTYPE_PURE, 2, Qprotected_field, Qerror)); |
1ab256cb | 5433 | Fput (Qprotected_field, Qerror_message, |
2a0213a6 | 5434 | build_pure_c_string ("Attempt to modify a protected field")); |
1ab256cb | 5435 | |
422745d0 TT |
5436 | DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format", |
5437 | mode_line_format, | |
5438 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5439 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5440 | |
422745d0 TT |
5441 | DEFVAR_BUFFER_DEFAULTS ("default-header-line-format", |
5442 | header_line_format, | |
5443 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5444 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5445 | |
422745d0 TT |
5446 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type, |
5447 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5448 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5449 | |
422745d0 TT |
5450 | DEFVAR_BUFFER_DEFAULTS ("default-line-spacing", |
5451 | extra_line_spacing, | |
5452 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5453 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5454 | |
422745d0 TT |
5455 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows", |
5456 | cursor_in_non_selected_windows, | |
5457 | doc: /* Default value of `cursor-in-non-selected-windows'. | |
187ccf49 KS |
5458 | This is the same as (default-value 'cursor-in-non-selected-windows). */); |
5459 | ||
422745d0 TT |
5460 | DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode", |
5461 | abbrev_mode, | |
5462 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. | |
018ba359 | 5463 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb | 5464 | |
422745d0 TT |
5465 | DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow", |
5466 | ctl_arrow, | |
5467 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. | |
018ba359 | 5468 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5469 | |
422745d0 TT |
5470 | DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters", |
5471 | enable_multibyte_characters, | |
fb7ada5f | 5472 | doc: /* Default value of `enable-multibyte-characters' for buffers not overriding it. |
018ba359 | 5473 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5474 | |
422745d0 TT |
5475 | DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system", |
5476 | buffer_file_coding_system, | |
5477 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. | |
018ba359 | 5478 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5479 | |
422745d0 TT |
5480 | DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines", |
5481 | truncate_lines, | |
5482 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5483 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb | 5484 | |
422745d0 TT |
5485 | DEFVAR_BUFFER_DEFAULTS ("default-fill-column", |
5486 | fill_column, | |
5487 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5488 | This is the same as (default-value 'fill-column). */); |
1ab256cb | 5489 | |
422745d0 TT |
5490 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin", |
5491 | left_margin, | |
5492 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5493 | This is the same as (default-value 'left-margin). */); |
1ab256cb | 5494 | |
422745d0 TT |
5495 | DEFVAR_BUFFER_DEFAULTS ("default-tab-width", |
5496 | tab_width, | |
5497 | doc: /* Default value of `tab-width' for buffers that do not override it. | |
276e8873 SM |
5498 | NOTE: This controls the display width of a TAB character, and not |
5499 | the size of an indentation step. | |
018ba359 | 5500 | This is the same as (default-value 'tab-width). */); |
1ab256cb | 5501 | |
422745d0 TT |
5502 | DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search", |
5503 | case_fold_search, | |
5504 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5505 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5506 | |
422745d0 TT |
5507 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width", |
5508 | left_margin_cols, | |
5509 | doc: /* Default value of `left-margin-width' for buffers that don't override it. | |
018ba359 | 5510 | This is the same as (default-value 'left-margin-width). */); |
0552666b | 5511 | |
422745d0 TT |
5512 | DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width", |
5513 | right_margin_cols, | |
5514 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5515 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5516 | |
422745d0 TT |
5517 | DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width", |
5518 | left_fringe_width, | |
5519 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5520 | This is the same as (default-value 'left-fringe-width). */); |
5521 | ||
422745d0 TT |
5522 | DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width", |
5523 | right_fringe_width, | |
5524 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5525 | This is the same as (default-value 'right-fringe-width). */); |
5526 | ||
422745d0 TT |
5527 | DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins", |
5528 | fringes_outside_margins, | |
5529 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
2ad8731a KS |
5530 | This is the same as (default-value 'fringes-outside-margins). */); |
5531 | ||
422745d0 TT |
5532 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width", |
5533 | scroll_bar_width, | |
5534 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
2ad8731a KS |
5535 | This is the same as (default-value 'scroll-bar-width). */); |
5536 | ||
422745d0 TT |
5537 | DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar", |
5538 | vertical_scroll_bar_type, | |
5539 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
2ad8731a KS |
5540 | This is the same as (default-value 'vertical-scroll-bar). */); |
5541 | ||
422745d0 TT |
5542 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines", |
5543 | indicate_empty_lines, | |
5544 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5545 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5546 | |
422745d0 TT |
5547 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries", |
5548 | indicate_buffer_boundaries, | |
5549 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
6b61353c KH |
5550 | This is the same as (default-value 'indicate-buffer-boundaries). */); |
5551 | ||
422745d0 TT |
5552 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist", |
5553 | fringe_indicator_alist, | |
5554 | doc: /* Default value of `fringe-indicator-alist' for buffers that don't override it. | |
c6a46372 KS |
5555 | This is the same as (default-value 'fringe-indicator-alist'). */); |
5556 | ||
422745d0 TT |
5557 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist", |
5558 | fringe_cursor_alist, | |
5559 | doc: /* Default value of `fringe-cursor-alist' for buffers that don't override it. | |
c6a46372 KS |
5560 | This is the same as (default-value 'fringe-cursor-alist'). */); |
5561 | ||
422745d0 TT |
5562 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively", |
5563 | scroll_up_aggressively, | |
5564 | doc: /* Default value of `scroll-up-aggressively'. | |
7614d762 | 5565 | This value applies in buffers that don't have their own local values. |
fc961256 | 5566 | This is the same as (default-value 'scroll-up-aggressively). */); |
177c0ea7 | 5567 | |
422745d0 TT |
5568 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively", |
5569 | scroll_down_aggressively, | |
5570 | doc: /* Default value of `scroll-down-aggressively'. | |
7614d762 | 5571 | This value applies in buffers that don't have their own local values. |
fc961256 | 5572 | This is the same as (default-value 'scroll-down-aggressively). */); |
177c0ea7 | 5573 | |
045dee35 | 5574 | DEFVAR_PER_BUFFER ("header-line-format", |
4b4deea2 | 5575 | &BVAR (current_buffer, header_line_format), |
7ee72033 | 5576 | Qnil, |
7614d762 RS |
5577 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5578 | The header line appears, optionally, at the top of a window; | |
5579 | the mode line appears at the bottom. */); | |
177c0ea7 | 5580 | |
4b4deea2 | 5581 | DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer, mode_line_format), |
efc7e75f PJ |
5582 | Qnil, |
5583 | doc: /* Template for displaying mode line for current buffer. | |
5f2c76c6 CY |
5584 | |
5585 | The value may be nil, a string, a symbol or a list. | |
5586 | ||
018ba359 | 5587 | A value of nil means don't display a mode line. |
5f2c76c6 CY |
5588 | |
5589 | For any symbol other than t or nil, the symbol's value is processed as | |
5590 | a mode line construct. As a special exception, if that value is a | |
5591 | string, the string is processed verbatim, without handling any | |
5592 | %-constructs (see below). Also, unless the symbol has a non-nil | |
5593 | `risky-local-variable' property, all properties in any strings, as | |
5594 | well as all :eval and :propertize forms in the value, are ignored. | |
5595 | ||
5596 | A list whose car is a string or list is processed by processing each | |
5597 | of the list elements recursively, as separate mode line constructs, | |
5598 | and concatenating the results. | |
5599 | ||
5600 | A list of the form `(:eval FORM)' is processed by evaluating FORM and | |
5601 | using the result as a mode line construct. Be careful--FORM should | |
5602 | not load any files, because that can cause an infinite recursion. | |
5603 | ||
5604 | A list of the form `(:propertize ELT PROPS...)' is processed by | |
5605 | processing ELT as the mode line construct, and adding the text | |
5606 | properties PROPS to the result. | |
5607 | ||
5608 | A list whose car is a symbol is processed by examining the symbol's | |
5609 | value, and, if that value is non-nil, processing the cadr of the list | |
5610 | recursively; and if that value is nil, processing the caddr of the | |
5611 | list recursively. | |
5612 | ||
5613 | A list whose car is an integer is processed by processing the cadr of | |
5614 | the list, and padding (if the number is positive) or truncating (if | |
5615 | negative) to the width specified by that number. | |
5616 | ||
018ba359 | 5617 | A string is printed verbatim in the mode line except for %-constructs: |
018ba359 PJ |
5618 | %b -- print buffer name. %f -- print visited file name. |
5619 | %F -- print frame name. | |
5620 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5621 | %& is like %*, but ignore read-only-ness. | |
5622 | % means buffer is read-only and * means it is modified. | |
5623 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5624 | %s -- print process status. %l -- print the current line number. | |
5625 | %c -- print the current column number (this makes editing slower). | |
5626 | To make the column number update correctly in all cases, | |
5627 | `column-number-mode' must be non-nil. | |
6b61353c KH |
5628 | %i -- print the size of the buffer. |
5629 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5630 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5631 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5632 | or print Bottom or All. | |
018ba359 | 5633 | %n -- print Narrow if appropriate. |
dafbe726 | 5634 | %t -- visited file is text or binary (if OS supports this distinction). |
47419860 | 5635 | %z -- print mnemonics of keyboard, terminal, and buffer coding systems. |
018ba359 | 5636 | %Z -- like %z, but including the end-of-line format. |
dafbe726 | 5637 | %e -- print error message about full memory. |
f7165034 NR |
5638 | %@ -- print @ or hyphen. @ means that default-directory is on a |
5639 | remote machine. | |
018ba359 PJ |
5640 | %[ -- print one [ for each recursive editing level. %] similar. |
5641 | %% -- print %. %- -- print infinitely many dashes. | |
5642 | Decimal digits after the % specify field width to which to pad. */); | |
5643 | ||
422745d0 | 5644 | DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode, |
fb7ada5f | 5645 | doc: /* Value of `major-mode' for new buffers. */); |
1ab256cb | 5646 | |
4b4deea2 | 5647 | DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer, major_mode), |
58cc0a01 | 5648 | Qsymbolp, |
5a021dd0 GM |
5649 | doc: /* Symbol for current buffer's major mode. |
5650 | The default value (normally `fundamental-mode') affects new buffers. | |
5651 | A value of nil means to use the current buffer's major mode, provided | |
5652 | it is not marked as "special". | |
5653 | ||
5654 | When a mode is used by default, `find-file' switches to it before it | |
5655 | reads the contents into the buffer and before it finishes setting up | |
5656 | the buffer. Thus, the mode and its hooks should not expect certain | |
5657 | variables such as `buffer-read-only' and `buffer-file-coding-system' | |
5658 | to be set up. */); | |
1ab256cb | 5659 | |
4b4deea2 | 5660 | DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer, mode_name), |
c01d0677 | 5661 | Qnil, |
64a7c220 | 5662 | doc: /* Pretty name of current buffer's major mode. |
7cb70974 EZ |
5663 | Usually a string, but can use any of the constructs for `mode-line-format', |
5664 | which see. | |
5665 | Format with `format-mode-line' to produce a string value. */); | |
1ab256cb | 5666 | |
4b4deea2 | 5667 | DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer, abbrev_table), Qnil, |
d6aa1876 SM |
5668 | doc: /* Local (mode-specific) abbrev table of current buffer. */); |
5669 | ||
4b4deea2 | 5670 | DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer, abbrev_mode), Qnil, |
9d794026 GM |
5671 | doc: /* Non-nil if Abbrev mode is enabled. |
5672 | Use the command `abbrev-mode' to change this variable. */); | |
1ab256cb | 5673 | |
4b4deea2 | 5674 | DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer, case_fold_search), |
7ee72033 | 5675 | Qnil, |
fb7ada5f | 5676 | doc: /* Non-nil if searches and matches should ignore case. */); |
1ab256cb | 5677 | |
4b4deea2 | 5678 | DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer, fill_column), |
58cc0a01 | 5679 | Qintegerp, |
fb7ada5f | 5680 | doc: /* Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5681 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb | 5682 | |
4b4deea2 | 5683 | DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer, left_margin), |
58cc0a01 | 5684 | Qintegerp, |
fb7ada5f | 5685 | doc: /* Column for the default `indent-line-function' to indent to. |
018ba359 | 5686 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb | 5687 | |
4b4deea2 | 5688 | DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer, tab_width), |
58cc0a01 | 5689 | Qintegerp, |
fb7ada5f | 5690 | doc: /* Distance between tab stops (for display of tab characters), in columns. |
276e8873 SM |
5691 | NOTE: This controls the display width of a TAB character, and not |
5692 | the size of an indentation step. | |
fde4eb86 | 5693 | This should be an integer greater than zero. */); |
1ab256cb | 5694 | |
4b4deea2 | 5695 | DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer, ctl_arrow), Qnil, |
fb7ada5f | 5696 | doc: /* Non-nil means display control chars with uparrow. |
018ba359 PJ |
5697 | A value of nil means use backslash and octal digits. |
5698 | This variable does not apply to characters whose display is specified | |
5699 | in the current display table (if there is one). */); | |
1ab256cb | 5700 | |
3b06f880 | 5701 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
4b4deea2 | 5702 | &BVAR (current_buffer, enable_multibyte_characters), |
a9b9a780 | 5703 | Qnil, |
efc7e75f | 5704 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5705 | Otherwise they are regarded as unibyte. This affects the display, |
5706 | file I/O and the behavior of various editing commands. | |
5707 | ||
5708 | This variable is buffer-local but you cannot set it directly; | |
5709 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
a66cfb1c | 5710 | See also Info node `(elisp)Text Representations'. */); |
d67b4f80 | 5711 | XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5712 | |
c71b5d9b | 5713 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
4b4deea2 | 5714 | &BVAR (current_buffer, buffer_file_coding_system), Qnil, |
efc7e75f | 5715 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5716 | This variable applies to saving the buffer, and also to `write-region' |
5717 | and other functions that use `write-region'. | |
5718 | It does not apply to sending output to subprocesses, however. | |
5719 | ||
5720 | If this is nil, the buffer is saved without any code conversion | |
5721 | unless some coding system is specified in `file-coding-system-alist' | |
5722 | for the buffer file. | |
5723 | ||
31a6cb06 EZ |
5724 | If the text to be saved cannot be encoded as specified by this variable, |
5725 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5726 | ||
018ba359 PJ |
5727 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5728 | ||
5729 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5730 | |
f44e260c | 5731 | DEFVAR_PER_BUFFER ("bidi-display-reordering", |
4b4deea2 | 5732 | &BVAR (current_buffer, bidi_display_reordering), Qnil, |
938efb77 | 5733 | doc: /* Non-nil means reorder bidirectional text for display in the visual order. */); |
3b06f880 | 5734 | |
6c0cf218 | 5735 | DEFVAR_PER_BUFFER ("bidi-paragraph-direction", |
4b4deea2 | 5736 | &BVAR (current_buffer, bidi_paragraph_direction), Qnil, |
fb7ada5f | 5737 | doc: /* If non-nil, forces directionality of text paragraphs in the buffer. |
b4bf28b7 | 5738 | |
b44d9321 EZ |
5739 | If this is nil (the default), the direction of each paragraph is |
5740 | determined by the first strong directional character of its text. | |
5741 | The values of `right-to-left' and `left-to-right' override that. | |
5742 | Any other value is treated as nil. | |
b4bf28b7 | 5743 | |
b44d9321 EZ |
5744 | This variable has no effect unless the buffer's value of |
5745 | \`bidi-display-reordering' is non-nil. */); | |
5746 | ||
4b4deea2 | 5747 | DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer, truncate_lines), Qnil, |
fb7ada5f | 5748 | doc: /* Non-nil means do not display continuation lines. |
7614d762 | 5749 | Instead, give each line of text just one screen line. |
018ba359 PJ |
5750 | |
5751 | Note that this is overridden by the variable | |
5752 | `truncate-partial-width-windows' if that variable is non-nil | |
32bbb17c GM |
5753 | and this buffer is not full-frame width. |
5754 | ||
5755 | Minibuffers set this variable to nil. */); | |
1ab256cb | 5756 | |
4b4deea2 | 5757 | DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer, word_wrap), Qnil, |
fb7ada5f | 5758 | doc: /* Non-nil means to use word-wrapping for continuation lines. |
0858cd02 CY |
5759 | When word-wrapping is on, continuation lines are wrapped at the space |
5760 | or tab character nearest to the right window edge. | |
5761 | If nil, continuation lines are wrapped at the right screen edge. | |
5762 | ||
5763 | This variable has no effect if long lines are truncated (see | |
eb577e27 GM |
5764 | `truncate-lines' and `truncate-partial-width-windows'). If you use |
5765 | word-wrapping, you might want to reduce the value of | |
5766 | `truncate-partial-width-windows', since wrapping can make text readable | |
c5cfcbe0 CY |
5767 | in narrower windows. |
5768 | ||
5769 | Instead of setting this variable directly, most users should use | |
5770 | Visual Line mode . Visual Line mode, when enabled, sets `word-wrap' | |
5771 | to t, and additionally redefines simple editing commands to act on | |
5772 | visual lines rather than logical lines. See the documentation of | |
5773 | `visual-line-mode'. */); | |
0858cd02 | 5774 | |
4b4deea2 | 5775 | DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer, directory), |
58cc0a01 | 5776 | Qstringp, |
efc7e75f | 5777 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5778 | To interactively change the default directory, use command `cd'. */); |
1ab256cb | 5779 | |
4b4deea2 | 5780 | DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer, auto_fill_function), |
7ee72033 | 5781 | Qnil, |
efc7e75f | 5782 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5783 | It is called after self-inserting any character specified in |
5784 | the `auto-fill-chars' table. | |
5785 | NOTE: This variable is not a hook; | |
5786 | its value may not be a list of functions. */); | |
1ab256cb | 5787 | |
4b4deea2 | 5788 | DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer, filename), |
58cc0a01 | 5789 | Qstringp, |
ecda65d4 SM |
5790 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. |
5791 | This should be an absolute file name. */); | |
1ab256cb | 5792 | |
4b4deea2 | 5793 | DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer, file_truename), |
58cc0a01 | 5794 | Qstringp, |
efc7e75f | 5795 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5796 | The truename of a file is calculated by `file-truename' |
5797 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5798 | |
1ab256cb | 5799 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
4b4deea2 | 5800 | &BVAR (current_buffer, auto_save_file_name), |
58cc0a01 | 5801 | Qstringp, |
7614d762 RS |
5802 | doc: /* Name of file for auto-saving current buffer. |
5803 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5804 | |
4b4deea2 | 5805 | DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer, read_only), Qnil, |
efc7e75f | 5806 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5807 | |
4b4deea2 | 5808 | DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer, backed_up), Qnil, |
efc7e75f | 5809 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5810 | Backing up is done before the first time the file is saved. */); |
1ab256cb | 5811 | |
4b4deea2 | 5812 | DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer, save_length), |
58cc0a01 | 5813 | Qintegerp, |
efc7e75f | 5814 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
4be941e3 RS |
5815 | 0 initially. |
5816 | -1 means auto-saving turned off until next real save. | |
5817 | ||
5818 | If you set this to -2, that means don't turn off auto-saving in this buffer | |
5819 | if its text size shrinks. If you use `buffer-swap-text' on a buffer, | |
5820 | you probably should set this to -2 in that buffer. */); | |
1ab256cb | 5821 | |
4b4deea2 | 5822 | DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer, selective_display), |
7ee72033 | 5823 | Qnil, |
7614d762 | 5824 | doc: /* Non-nil enables selective display. |
a66f285a JB |
5825 | An integer N as value means display only lines |
5826 | that start with less than N columns of space. | |
7614d762 RS |
5827 | A value of t means that the character ^M makes itself and |
5828 | all the rest of the line invisible; also, when saving the buffer | |
5829 | in a file, save the ^M as a newline. */); | |
1ab256cb | 5830 | |
1ab256cb | 5831 | DEFVAR_PER_BUFFER ("selective-display-ellipses", |
4b4deea2 | 5832 | &BVAR (current_buffer, selective_display_ellipses), |
7ee72033 | 5833 | Qnil, |
3f676284 | 5834 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb | 5835 | |
4b4deea2 | 5836 | DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer, overwrite_mode), Qnil, |
efc7e75f | 5837 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5838 | The value should be one of `overwrite-mode-textual', |
5839 | `overwrite-mode-binary', or nil. | |
5840 | If it is `overwrite-mode-textual', self-insertion still | |
5841 | inserts at the end of a line, and inserts when point is before a tab, | |
5842 | until the tab is filled in. | |
5843 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5844 | ||
4b4deea2 | 5845 | DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer, display_table), |
7ee72033 | 5846 | Qnil, |
efc7e75f | 5847 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5848 | |
5849 | If this variable is nil, the value of `standard-display-table' is used. | |
5850 | Each window can have its own, overriding display table, see | |
5851 | `set-window-display-table' and `window-display-table'. | |
5852 | ||
5853 | The display table is a char-table created with `make-display-table'. | |
5854 | A char-table is an array indexed by character codes. Normal array | |
5855 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5856 | ||
5857 | Each of the char-table elements control how to display the corresponding | |
5858 | text character: the element at index C in the table says how to display | |
5859 | the character whose code is C. Each element should be a vector of | |
426a9163 JB |
5860 | characters or nil. The value nil means display the character in the |
5861 | default fashion; otherwise, the characters from the vector are delivered | |
5862 | to the screen instead of the original character. | |
018ba359 | 5863 | |
5fd11dc8 | 5864 | For example, (aset buffer-display-table ?X [?Y]) tells Emacs |
adbb3b05 | 5865 | to display a capital Y instead of each X character. |
018ba359 PJ |
5866 | |
5867 | In addition, a char-table has six extra slots to control the display of: | |
5868 | ||
5869 | the end of a truncated screen line (extra-slot 0, a single character); | |
5870 | the end of a continued line (extra-slot 1, a single character); | |
5871 | the escape character used to display character codes in octal | |
5872 | (extra-slot 2, a single character); | |
5873 | the character used as an arrow for control characters (extra-slot 3, | |
5874 | a single character); | |
5875 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5876 | a vector of characters); | |
5877 | the character used to draw the border between side-by-side windows | |
5878 | (extra-slot 5, a single character). | |
5879 | ||
5880 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5881 | |
4b4deea2 | 5882 | DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer, left_margin_cols), |
58cc0a01 | 5883 | Qintegerp, |
0df00f59 | 5884 | doc: /* Width in columns of left marginal area for display of a buffer. |
ddd6b685 EZ |
5885 | A value of nil means no marginal area. |
5886 | ||
5887 | Setting this variable does not take effect until a new buffer is displayed | |
5888 | in a window. To make the change take effect, call `set-window-buffer'. */); | |
177c0ea7 | 5889 | |
4b4deea2 | 5890 | DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer, right_margin_cols), |
58cc0a01 | 5891 | Qintegerp, |
0df00f59 | 5892 | doc: /* Width in columns of right marginal area for display of a buffer. |
ddd6b685 EZ |
5893 | A value of nil means no marginal area. |
5894 | ||
5895 | Setting this variable does not take effect until a new buffer is displayed | |
5896 | in a window. To make the change take effect, call `set-window-buffer'. */); | |
177c0ea7 | 5897 | |
4b4deea2 | 5898 | DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer, left_fringe_width), |
58cc0a01 | 5899 | Qintegerp, |
fb7ada5f | 5900 | doc: /* Width of this buffer's left fringe (in pixels). |
2ad8731a | 5901 | A value of 0 means no left fringe is shown in this buffer's window. |
ddd6b685 EZ |
5902 | A value of nil means to use the left fringe width from the window's frame. |
5903 | ||
5904 | Setting this variable does not take effect until a new buffer is displayed | |
5905 | in a window. To make the change take effect, call `set-window-buffer'. */); | |
2ad8731a | 5906 | |
4b4deea2 | 5907 | DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer, right_fringe_width), |
58cc0a01 | 5908 | Qintegerp, |
fb7ada5f | 5909 | doc: /* Width of this buffer's right fringe (in pixels). |
2ad8731a | 5910 | A value of 0 means no right fringe is shown in this buffer's window. |
ddd6b685 EZ |
5911 | A value of nil means to use the right fringe width from the window's frame. |
5912 | ||
5913 | Setting this variable does not take effect until a new buffer is displayed | |
5914 | in a window. To make the change take effect, call `set-window-buffer'. */); | |
2ad8731a | 5915 | |
4b4deea2 | 5916 | DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer, fringes_outside_margins), |
2ad8731a | 5917 | Qnil, |
fb7ada5f | 5918 | doc: /* Non-nil means to display fringes outside display margins. |
ddd6b685 EZ |
5919 | A value of nil means to display fringes between margins and buffer text. |
5920 | ||
5921 | Setting this variable does not take effect until a new buffer is displayed | |
5922 | in a window. To make the change take effect, call `set-window-buffer'. */); | |
2ad8731a | 5923 | |
4b4deea2 | 5924 | DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer, scroll_bar_width), |
58cc0a01 | 5925 | Qintegerp, |
fb7ada5f | 5926 | doc: /* Width of this buffer's scroll bars in pixels. |
2ad8731a KS |
5927 | A value of nil means to use the scroll bar width from the window's frame. */); |
5928 | ||
4b4deea2 | 5929 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer, vertical_scroll_bar_type), |
2ad8731a | 5930 | Qnil, |
fb7ada5f | 5931 | doc: /* Position of this buffer's vertical scroll bar. |
7c6b2007 | 5932 | The value takes effect whenever you tell a window to display this buffer; |
188577ce | 5933 | for instance, with `set-window-buffer' or when `display-buffer' displays it. |
7c6b2007 | 5934 | |
fc2c8887 RS |
5935 | A value of `left' or `right' means put the vertical scroll bar at that side |
5936 | of the window; a value of nil means don't show any vertical scroll bars. | |
5937 | A value of t (the default) means do whatever the window's frame specifies. */); | |
2ad8731a | 5938 | |
0552666b | 5939 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
4b4deea2 | 5940 | &BVAR (current_buffer, indicate_empty_lines), Qnil, |
fb7ada5f | 5941 | doc: /* Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5942 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5943 | window-systems. */); | |
177c0ea7 | 5944 | |
6b61353c | 5945 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
4b4deea2 | 5946 | &BVAR (current_buffer, indicate_buffer_boundaries), Qnil, |
fb7ada5f | 5947 | doc: /* Visually indicate buffer boundaries and scrolling. |
6b61353c KH |
5948 | If non-nil, the first and last line of the buffer are marked in the fringe |
5949 | of a window on window-systems with angle bitmaps, or if the window can be | |
5950 | scrolled, the top and bottom line of the window are marked with up and down | |
5951 | arrow bitmaps. | |
b2229037 KS |
5952 | |
5953 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
79e3497d | 5954 | are displayed in the left or right fringe, resp. Any other value |
845a78b4 | 5955 | that doesn't look like an alist means display the angle bitmaps in |
79e3497d | 5956 | the left fringe but no arrows. |
b2229037 | 5957 | |
79e3497d RS |
5958 | You can exercise more precise control by using an alist as the |
5959 | value. Each alist element (INDICATOR . POSITION) specifies | |
5960 | where to show one of the indicators. INDICATOR is one of `top', | |
b2229037 KS |
5961 | `bottom', `up', `down', or t, which specifies the default position, |
5962 | and POSITION is one of `left', `right', or nil, meaning do not show | |
5963 | this indicator. | |
5964 | ||
5965 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
5966 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
6b61353c | 5967 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 5968 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
6b61353c | 5969 | |
c6a46372 | 5970 | DEFVAR_PER_BUFFER ("fringe-indicator-alist", |
4b4deea2 | 5971 | &BVAR (current_buffer, fringe_indicator_alist), Qnil, |
fb7ada5f | 5972 | doc: /* Mapping from logical to physical fringe indicator bitmaps. |
c6a46372 KS |
5973 | The value is an alist where each element (INDICATOR . BITMAPS) |
5974 | specifies the fringe bitmaps used to display a specific logical | |
5975 | fringe indicator. | |
5976 | ||
5977 | INDICATOR specifies the logical indicator type which is one of the | |
5978 | following symbols: `truncation' , `continuation', `overlay-arrow', | |
14fb5704 | 5979 | `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'. |
c6a46372 | 5980 | |
14fb5704 | 5981 | BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies |
c6a46372 KS |
5982 | the actual bitmap shown in the left or right fringe for the logical |
5983 | indicator. LEFT and RIGHT are the bitmaps shown in the left and/or | |
5984 | right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps | |
14fb5704 JB |
5985 | are used only for the `bottom' and `top-bottom' indicators when the |
5986 | last (only) line has no final newline. BITMAPS may also be a single | |
c6a46372 KS |
5987 | symbol which is used in both left and right fringes. */); |
5988 | ||
5989 | DEFVAR_PER_BUFFER ("fringe-cursor-alist", | |
4b4deea2 | 5990 | &BVAR (current_buffer, fringe_cursor_alist), Qnil, |
fb7ada5f | 5991 | doc: /* Mapping from logical to physical fringe cursor bitmaps. |
c6a46372 KS |
5992 | The value is an alist where each element (CURSOR . BITMAP) |
5993 | specifies the fringe bitmaps used to display a specific logical | |
5994 | cursor type in the fringe. | |
5995 | ||
5996 | CURSOR specifies the logical cursor type which is one of the following | |
5997 | symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last | |
5998 | one is used to show a hollow cursor on narrow lines display lines | |
5999 | where the normal hollow cursor will not fit. | |
6000 | ||
6001 | BITMAP is the corresponding fringe bitmap shown for the logical | |
6002 | cursor type. */); | |
6003 | ||
0552666b | 6004 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
58cc0a01 | 6005 | &BVAR (current_buffer, scroll_up_aggressively), Qfloatp, |
4e0692c1 RS |
6006 | doc: /* How far to scroll windows upward. |
6007 | If you move point off the bottom, the window scrolls automatically. | |
426a9163 | 6008 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
6009 | means scroll to center point. A fraction means scroll to put point |
6010 | that fraction of the window's height from the bottom of the window. | |
d765e3a3 JB |
6011 | When the value is 0.0, point goes at the bottom line, which in the |
6012 | simple case that you moved off with C-f means scrolling just one line. | |
6013 | 1.0 means point goes at the top, so that in that simple case, the | |
6014 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 6015 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 6016 | |
0552666b | 6017 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
58cc0a01 | 6018 | &BVAR (current_buffer, scroll_down_aggressively), Qfloatp, |
4e0692c1 RS |
6019 | doc: /* How far to scroll windows downward. |
6020 | If you move point off the top, the window scrolls automatically. | |
426a9163 | 6021 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
6022 | means scroll to center point. A fraction means scroll to put point |
6023 | that fraction of the window's height from the top of the window. | |
d765e3a3 JB |
6024 | When the value is 0.0, point goes at the top line, which in the |
6025 | simple case that you moved off with C-b means scrolling just one line. | |
6026 | 1.0 means point goes at the bottom, so that in that simple case, the | |
6027 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 6028 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 6029 | |
29208e82 | 6030 | DEFVAR_LISP ("before-change-functions", Vbefore_change_functions, |
7ee72033 | 6031 | doc: /* List of functions to call before each text change. |
018ba359 PJ |
6032 | Two arguments are passed to each function: the positions of |
6033 | the beginning and end of the range of old text to be changed. | |
6034 | \(For an insertion, the beginning and end are at the same place.) | |
6035 | No information is given about the length of the text after the change. | |
6036 | ||
6037 | Buffer changes made while executing the `before-change-functions' | |
6038 | don't call any before-change or after-change functions. | |
7b2bf907 | 6039 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
6040 | |
6041 | If an unhandled error happens in running these functions, | |
6042 | the variable's value remains nil. That prevents the error | |
6043 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
6044 | Vbefore_change_functions = Qnil; |
6045 | ||
29208e82 | 6046 | DEFVAR_LISP ("after-change-functions", Vafter_change_functions, |
eacdfade | 6047 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
6048 | Three arguments are passed to each function: the positions of |
6049 | the beginning and end of the range of changed text, | |
6050 | and the length in bytes of the pre-change text replaced by that range. | |
6051 | \(For an insertion, the pre-change length is zero; | |
6052 | for a deletion, that length is the number of bytes deleted, | |
6053 | and the post-change beginning and end are at the same place.) | |
6054 | ||
6055 | Buffer changes made while executing the `after-change-functions' | |
6056 | don't call any before-change or after-change functions. | |
7b2bf907 | 6057 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
6058 | |
6059 | If an unhandled error happens in running these functions, | |
6060 | the variable's value remains nil. That prevents the error | |
6061 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
6062 | Vafter_change_functions = Qnil; |
6063 | ||
29208e82 | 6064 | DEFVAR_LISP ("first-change-hook", Vfirst_change_hook, |
efc7e75f | 6065 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 6066 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 6067 | Vfirst_change_hook = Qnil; |
1ab256cb | 6068 | |
4b4deea2 | 6069 | DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer, undo_list), Qnil, |
7ee72033 | 6070 | doc: /* List of undo entries in current buffer. |
018ba359 PJ |
6071 | Recent changes come first; older changes follow newer. |
6072 | ||
6073 | An entry (BEG . END) represents an insertion which begins at | |
6074 | position BEG and ends at position END. | |
6075 | ||
6076 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
6077 | from (abs POSITION). If POSITION is positive, point was at the front | |
6078 | of the text being deleted; if negative, point was at the end. | |
6079 | ||
d35af63c PE |
6080 | An entry (t HIGH LOW USEC PSEC) indicates that the buffer was previously |
6081 | unmodified; (HIGH LOW USEC PSEC) is in the same style as (current-time) | |
6082 | and is the visited file's modification time, as of that time. If the | |
018ba359 PJ |
6083 | modification time of the most recent save is different, this entry is |
6084 | obsolete. | |
6085 | ||
954b166e PE |
6086 | An entry (t . 0) means means the buffer was previously unmodified but |
6087 | its time stamp was unknown because it was not associated with a file. | |
6088 | An entry (t . -1) is similar, except that it means the buffer's visited | |
6089 | file did not exist. | |
6090 | ||
018ba359 PJ |
6091 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property |
6092 | was modified between BEG and END. PROPERTY is the property name, | |
6093 | and VALUE is the old value. | |
6094 | ||
7405f386 KS |
6095 | An entry (apply FUN-NAME . ARGS) means undo the change with |
6096 | \(apply FUN-NAME ARGS). | |
6097 | ||
6098 | An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo | |
6099 | in the active region. BEG and END is the range affected by this entry | |
70ff8240 | 6100 | and DELTA is the number of characters added or deleted in that range by |
7405f386 | 6101 | this change. |
c6c7dc03 | 6102 | |
018ba359 PJ |
6103 | An entry (MARKER . DISTANCE) indicates that the marker MARKER |
6104 | was adjusted in position by the offset DISTANCE (an integer). | |
6105 | ||
6106 | An entry of the form POSITION indicates that point was at the buffer | |
6107 | location given by the integer. Undoing an entry of this form places | |
6108 | point at POSITION. | |
6109 | ||
b4c4f2f4 JB |
6110 | Entries with value `nil' mark undo boundaries. The undo command treats |
6111 | the changes between two undo boundaries as a single step to be undone. | |
018ba359 PJ |
6112 | |
6113 | If the value of the variable is t, undo information is not recorded. */); | |
6114 | ||
4b4deea2 | 6115 | DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer, mark_active), Qnil, |
7ee72033 | 6116 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); |
018ba359 | 6117 | |
e30b79c1 DA |
6118 | DEFVAR_PER_BUFFER ("cache-long-scans", &BVAR (current_buffer, cache_long_scans), Qnil, |
6119 | doc: /* Non-nil means that Emacs should use caches in attempt to speedup buffer scans. | |
018ba359 PJ |
6120 | |
6121 | Normally, the line-motion functions work by scanning the buffer for | |
5629f29b DK |
6122 | newlines. Columnar operations (like `move-to-column' and |
6123 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
6124 | widths as they go. This works well for ordinary text, but if the |
6125 | buffer's lines are very long (say, more than 500 characters), these | |
6126 | motion functions will take longer to execute. Emacs may also take | |
6127 | longer to update the display. | |
6128 | ||
e30b79c1 | 6129 | If `cache-long-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
6130 | results of their scans, and consult the cache to avoid rescanning |
6131 | regions of the buffer until the text is modified. The caches are most | |
6132 | beneficial when they prevent the most searching---that is, when the | |
6133 | buffer contains long lines and large regions of characters with the | |
6134 | same, fixed screen width. | |
6135 | ||
e30b79c1 | 6136 | When `cache-long-scans' is non-nil, processing short lines will |
018ba359 PJ |
6137 | become slightly slower (because of the overhead of consulting the |
6138 | cache), and the caches will use memory roughly proportional to the | |
6139 | number of newlines and characters whose screen width varies. | |
6140 | ||
e30b79c1 DA |
6141 | Bidirectional editing also requires buffer scans to find paragraph |
6142 | separators. If you have large paragraphs or no paragraph separators | |
6143 | at all, these scans may be slow. If `cache-long-scans' is non-nil, | |
6144 | results of these scans are cached. This doesn't help too much if | |
6145 | paragraphs are of the reasonable (few thousands of characters) size. | |
6146 | ||
018ba359 PJ |
6147 | The caches require no explicit maintenance; their accuracy is |
6148 | maintained internally by the Emacs primitives. Enabling or disabling | |
6149 | the cache should not affect the behavior of any of the motion | |
6150 | functions; it should only affect their performance. */); | |
6151 | ||
4b4deea2 | 6152 | DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer, point_before_scroll), Qnil, |
7ee72033 | 6153 | doc: /* Value of point before the last series of scroll operations, or nil. */); |
018ba359 | 6154 | |
4b4deea2 | 6155 | DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer, file_format), Qnil, |
7ee72033 | 6156 | doc: /* List of formats to use when saving this buffer. |
018ba359 | 6157 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 6158 | set when a file is visited. */); |
be9aafdd | 6159 | |
71ed49fa | 6160 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
4b4deea2 | 6161 | &BVAR (current_buffer, auto_save_file_format), Qnil, |
fb7ada5f | 6162 | doc: /* Format in which to write auto-save files. |
71ed49fa LT |
6163 | Should be a list of symbols naming formats that are defined in `format-alist'. |
6164 | If it is t, which is the default, auto-save files are written in the | |
6165 | same format as a regular save would use. */); | |
6166 | ||
3cb719bd | 6167 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
4b4deea2 | 6168 | &BVAR (current_buffer, invisibility_spec), Qnil, |
7ee72033 | 6169 | doc: /* Invisibility spec of this buffer. |
018ba359 PJ |
6170 | The default is t, which means that text is invisible |
6171 | if it has a non-nil `invisible' property. | |
6172 | If the value is a list, a text character is invisible if its `invisible' | |
b49dd850 | 6173 | property is an element in that list (or is a list with members in common). |
018ba359 PJ |
6174 | If an element is a cons cell of the form (PROP . ELLIPSIS), |
6175 | then characters with property value PROP are invisible, | |
57f623e2 XF |
6176 | and they have an ellipsis as well if ELLIPSIS is non-nil. |
6177 | Setting this variable is very fast, much faster than scanning all the | |
6178 | text in the buffer looking for properties to change. */); | |
3cb719bd | 6179 | |
7962a441 | 6180 | DEFVAR_PER_BUFFER ("buffer-display-count", |
58cc0a01 | 6181 | &BVAR (current_buffer, display_count), Qintegerp, |
7ee72033 | 6182 | doc: /* A number incremented each time this buffer is displayed in a window. |
018ba359 | 6183 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
6184 | |
6185 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
4b4deea2 | 6186 | &BVAR (current_buffer, display_time), Qnil, |
7ee72033 | 6187 | doc: /* Time stamp updated each time this buffer is displayed in a window. |
018ba359 PJ |
6188 | The function `set-window-buffer' updates this variable |
6189 | to the value obtained by calling `current-time'. | |
6190 | If the buffer has never been shown in a window, the value is nil. */); | |
6191 | ||
29208e82 | 6192 | DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode, |
9d794026 GM |
6193 | doc: /* Non-nil if Transient Mark mode is enabled. |
6194 | See the command `transient-mark-mode' for a description of this minor mode. | |
6195 | ||
6196 | Non-nil also enables highlighting of the region whenever the mark is active. | |
6197 | The variable `highlight-nonselected-windows' controls whether to highlight | |
6198 | all windows or just the selected window. | |
6199 | ||
f49d1f52 | 6200 | Lisp programs may give this variable certain special values: |
9d794026 | 6201 | |
f49d1f52 SM |
6202 | - A value of `lambda' enables Transient Mark mode temporarily. |
6203 | It is disabled again after any subsequent action that would | |
6204 | normally deactivate the mark (e.g. buffer modification). | |
6205 | ||
6206 | - A value of (only . OLDVAL) enables Transient Mark mode | |
6207 | temporarily. After any subsequent point motion command that is | |
6208 | not shift-translated, or any other action that would normally | |
6209 | deactivate the mark (e.g. buffer modification), the value of | |
6210 | `transient-mark-mode' is set to OLDVAL. */); | |
c48f61ef RS |
6211 | Vtransient_mark_mode = Qnil; |
6212 | ||
29208e82 | 6213 | DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only, |
fb7ada5f | 6214 | doc: /* Non-nil means disregard read-only status of buffers or characters. |
018ba359 PJ |
6215 | If the value is t, disregard `buffer-read-only' and all `read-only' |
6216 | text properties. If the value is a list, disregard `buffer-read-only' | |
6217 | and disregard a `read-only' text property if the property value | |
6218 | is a member of the list. */); | |
a96b68f1 RS |
6219 | Vinhibit_read_only = Qnil; |
6220 | ||
4b4deea2 | 6221 | DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer, cursor_type), Qnil, |
f6e22881 | 6222 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
6223 | Values are interpreted as follows: |
6224 | ||
0f7b074f CY |
6225 | t use the cursor specified for the frame |
6226 | nil don't display a cursor | |
6227 | box display a filled box cursor | |
6228 | hollow display a hollow box cursor | |
6229 | bar display a vertical bar cursor with default width | |
6230 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
6231 | hbar display a horizontal bar cursor with default height | |
b4234f4c | 6232 | (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT |
0f7b074f | 6233 | ANYTHING ELSE display a hollow box cursor |
cd8d5236 | 6234 | |
e08b1705 MR |
6235 | When the buffer is displayed in a non-selected window, the |
6236 | cursor's appearance is instead controlled by the variable | |
6237 | `cursor-in-non-selected-windows'. */); | |
bb2ec976 | 6238 | |
a3bbced0 | 6239 | DEFVAR_PER_BUFFER ("line-spacing", |
58cc0a01 | 6240 | &BVAR (current_buffer, extra_line_spacing), Qnumberp, |
7ee72033 | 6241 | doc: /* Additional space to put between lines when displaying a buffer. |
3ba010e5 EZ |
6242 | The space is measured in pixels, and put below lines on graphic displays, |
6243 | see `display-graphic-p'. | |
60ebfdf3 | 6244 | If value is a floating point number, it specifies the spacing relative |
fc961256 | 6245 | to the default frame line height. A value of nil means add no extra space. */); |
a3bbced0 | 6246 | |
0124c5bd | 6247 | DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows", |
4b4deea2 | 6248 | &BVAR (current_buffer, cursor_in_non_selected_windows), Qnil, |
fb7ada5f | 6249 | doc: /* Non-nil means show a cursor in non-selected windows. |
66c6abf0 GM |
6250 | If nil, only shows a cursor in the selected window. |
6251 | If t, displays a cursor related to the usual cursor type | |
6252 | \(a solid box becomes hollow, a bar becomes a narrower bar). | |
6253 | You can also specify the cursor type as in the `cursor-type' variable. | |
6254 | Use Custom to set this variable and update the display." */); | |
0124c5bd | 6255 | |
29208e82 | 6256 | DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions, |
f6e22881 JB |
6257 | doc: /* List of functions called with no args to query before killing a buffer. |
6258 | The buffer being killed will be current while the functions are running. | |
b7e8d081 MR |
6259 | |
6260 | If any of them returns nil, the buffer is not killed. Functions run by | |
6261 | this hook are supposed to not change the current buffer. */); | |
dcdffbf6 RS |
6262 | Vkill_buffer_query_functions = Qnil; |
6263 | ||
29208e82 | 6264 | DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook, |
43ed3b8d CY |
6265 | doc: /* Normal hook run before changing the major mode of a buffer. |
6266 | The function `kill-all-local-variables' runs this before doing anything else. */); | |
6267 | Vchange_major_mode_hook = Qnil; | |
cd3520a4 | 6268 | DEFSYM (Qchange_major_mode_hook, "change-major-mode-hook"); |
43ed3b8d | 6269 | |
9397e56f MR |
6270 | DEFVAR_LISP ("buffer-list-update-hook", Vbuffer_list_update_hook, |
6271 | doc: /* Hook run when the buffer list changes. | |
6272 | Functions running this hook are `get-buffer-create', | |
6273 | `make-indirect-buffer', `rename-buffer', `kill-buffer', | |
96a72ee9 | 6274 | and `bury-buffer-internal'. */); |
9397e56f | 6275 | Vbuffer_list_update_hook = Qnil; |
cd3520a4 | 6276 | DEFSYM (Qbuffer_list_update_hook, "buffer-list-update-hook"); |
9397e56f | 6277 | |
0dc88e60 | 6278 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
6279 | defsubr (&Sbuffer_list); |
6280 | defsubr (&Sget_buffer); | |
6281 | defsubr (&Sget_file_buffer); | |
6282 | defsubr (&Sget_buffer_create); | |
336cd056 | 6283 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 6284 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb | 6285 | defsubr (&Sbuffer_name); |
1ab256cb | 6286 | defsubr (&Sbuffer_file_name); |
336cd056 | 6287 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 6288 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
6289 | defsubr (&Sbuffer_local_variables); |
6290 | defsubr (&Sbuffer_modified_p); | |
ecda65d4 | 6291 | defsubr (&Sforce_mode_line_update); |
1ab256cb RM |
6292 | defsubr (&Sset_buffer_modified_p); |
6293 | defsubr (&Sbuffer_modified_tick); | |
3e145152 | 6294 | defsubr (&Sbuffer_chars_modified_tick); |
1ab256cb RM |
6295 | defsubr (&Srename_buffer); |
6296 | defsubr (&Sother_buffer); | |
1ab256cb RM |
6297 | defsubr (&Sbuffer_enable_undo); |
6298 | defsubr (&Skill_buffer); | |
e4ed06f1 | 6299 | defsubr (&Sbury_buffer_internal); |
a9ee7a59 | 6300 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
6301 | defsubr (&Scurrent_buffer); |
6302 | defsubr (&Sset_buffer); | |
6303 | defsubr (&Sbarf_if_buffer_read_only); | |
3ac81adb | 6304 | defsubr (&Serase_buffer); |
13cda5f9 | 6305 | defsubr (&Sbuffer_swap_text); |
3ac81adb | 6306 | defsubr (&Sset_buffer_multibyte); |
1ab256cb | 6307 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 6308 | |
52f8ec73 | 6309 | defsubr (&Soverlayp); |
2eec3b4e RS |
6310 | defsubr (&Smake_overlay); |
6311 | defsubr (&Sdelete_overlay); | |
c5e28e39 | 6312 | defsubr (&Sdelete_all_overlays); |
2eec3b4e | 6313 | defsubr (&Smove_overlay); |
8ebafa8d JB |
6314 | defsubr (&Soverlay_start); |
6315 | defsubr (&Soverlay_end); | |
6316 | defsubr (&Soverlay_buffer); | |
6317 | defsubr (&Soverlay_properties); | |
2eec3b4e | 6318 | defsubr (&Soverlays_at); |
74514898 | 6319 | defsubr (&Soverlays_in); |
2eec3b4e | 6320 | defsubr (&Snext_overlay_change); |
239c932b | 6321 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
6322 | defsubr (&Soverlay_recenter); |
6323 | defsubr (&Soverlay_lists); | |
6324 | defsubr (&Soverlay_get); | |
6325 | defsubr (&Soverlay_put); | |
a8c21b48 | 6326 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
6327 | } |
6328 | ||
dfcf069d | 6329 | void |
d3da34e0 | 6330 | keys_of_buffer (void) |
1ab256cb RM |
6331 | { |
6332 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
6333 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
6334 | |
6335 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
6336 | initialized when that function gets called. */ | |
d67b4f80 | 6337 | Fput (intern_c_string ("erase-buffer"), Qdisabled, Qt); |
1ab256cb | 6338 | } |