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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 | |
f162bcc3 PE |
23 | #define BUFFER_INLINE EXTERN_INLINE |
24 | ||
2381d133 JB |
25 | #include <sys/types.h> |
26 | #include <sys/stat.h> | |
1ab256cb | 27 | #include <sys/param.h> |
9dde47f5 | 28 | #include <errno.h> |
15e7873a | 29 | #include <stdio.h> |
dfcf069d | 30 | #include <unistd.h> |
7ee72033 | 31 | |
d6202519 PE |
32 | #include <verify.h> |
33 | ||
1ab256cb | 34 | #include "lisp.h" |
21cf4cf8 | 35 | #include "intervals.h" |
1ab256cb RM |
36 | #include "window.h" |
37 | #include "commands.h" | |
8f348ed5 | 38 | #include "character.h" |
e5560ff7 | 39 | #include "buffer.h" |
28e969dd | 40 | #include "region-cache.h" |
1ab256cb | 41 | #include "indent.h" |
d014bf88 | 42 | #include "blockinput.h" |
2538fae4 | 43 | #include "keyboard.h" |
e35f6ff7 | 44 | #include "keymap.h" |
08460cd4 | 45 | #include "frame.h" |
1ab256cb | 46 | |
70fe8236 | 47 | struct buffer *current_buffer; /* The current buffer. */ |
1ab256cb RM |
48 | |
49 | /* First buffer in chain of all buffers (in reverse order of creation). | |
179dade4 | 50 | Threaded through ->header.next.buffer. */ |
1ab256cb RM |
51 | |
52 | struct buffer *all_buffers; | |
53 | ||
54 | /* This structure holds the default values of the buffer-local variables | |
55 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
56 | The default value occupies the same slot in this structure | |
57 | as an individual buffer's value occupies in that buffer. | |
58 | Setting the default value also goes through the alist of buffers | |
59 | and stores into each buffer that does not say it has a local value. */ | |
60 | ||
e32a5799 | 61 | struct buffer alignas (GCALIGNMENT) buffer_defaults; |
1ab256cb | 62 | |
1ab256cb RM |
63 | /* This structure marks which slots in a buffer have corresponding |
64 | default values in buffer_defaults. | |
65 | Each such slot has a nonzero value in this structure. | |
66 | The value has only one nonzero bit. | |
67 | ||
68 | When a buffer has its own local value for a slot, | |
7c02e886 GM |
69 | the entry for that slot (found in the same slot in this structure) |
70 | is turned on in the buffer's local_flags array. | |
1ab256cb RM |
71 | |
72 | If a slot in this structure is -1, then even though there may | |
73 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
74 | and the corresponding slot in buffer_defaults is not used. | |
75 | ||
1ab256cb | 76 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is |
70fe8236 | 77 | zero, that is a bug. */ |
1ab256cb RM |
78 | |
79 | struct buffer buffer_local_flags; | |
80 | ||
81 | /* This structure holds the names of symbols whose values may be | |
70fe8236 | 82 | buffer-local. It is indexed and accessed in the same way as the above. */ |
1ab256cb | 83 | |
e32a5799 | 84 | struct buffer alignas (GCALIGNMENT) buffer_local_symbols; |
6b61353c | 85 | |
ce5b453a SM |
86 | /* Return the symbol of the per-buffer variable at offset OFFSET in |
87 | the buffer structure. */ | |
88 | ||
89 | #define PER_BUFFER_SYMBOL(OFFSET) \ | |
90 | (*(Lisp_Object *)((OFFSET) + (char *) &buffer_local_symbols)) | |
91 | ||
21514da7 PE |
92 | /* Maximum length of an overlay vector. */ |
93 | #define OVERLAY_COUNT_MAX \ | |
94 | ((ptrdiff_t) min (MOST_POSITIVE_FIXNUM, \ | |
663e2b3f | 95 | min (PTRDIFF_MAX, SIZE_MAX) / word_size)) |
21514da7 | 96 | |
13de9290 RS |
97 | /* Flags indicating which built-in buffer-local variables |
98 | are permanent locals. */ | |
7313acd0 | 99 | static char buffer_permanent_local_flags[MAX_PER_BUFFER_VARS]; |
7c02e886 GM |
100 | |
101 | /* Number of per-buffer variables used. */ | |
102 | ||
7313acd0 | 103 | int last_per_buffer_idx; |
13de9290 | 104 | |
f57e2426 | 105 | static void call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, |
37ef52bb | 106 | bool after, Lisp_Object arg1, |
f57e2426 J |
107 | Lisp_Object arg2, Lisp_Object arg3); |
108 | static void swap_out_buffer_local_variables (struct buffer *b); | |
37ef52bb | 109 | static void reset_buffer_local_variables (struct buffer *, bool); |
1ab256cb | 110 | |
70fe8236 | 111 | /* Alist of all buffer names vs the buffers. */ |
1ab256cb RM |
112 | /* This used to be a variable, but is no longer, |
113 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
114 | Lisp_Object Vbuffer_alist; | |
115 | ||
955cbe7b | 116 | static Lisp_Object Qkill_buffer_query_functions; |
dcdffbf6 | 117 | |
43ed3b8d | 118 | /* Hook run before changing a major mode. */ |
955cbe7b | 119 | static Lisp_Object Qchange_major_mode_hook; |
22378665 | 120 | |
dbc4e1c1 | 121 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
122 | Lisp_Object Qbefore_change_functions; |
123 | Lisp_Object Qafter_change_functions; | |
1ab256cb | 124 | |
955cbe7b PE |
125 | static Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; |
126 | static Lisp_Object Qpermanent_local_hook; | |
1ab256cb | 127 | |
955cbe7b | 128 | static Lisp_Object Qprotected_field; |
1ab256cb | 129 | |
70fe8236 | 130 | static Lisp_Object QSFundamental; /* A string "Fundamental". */ |
1ab256cb | 131 | |
955cbe7b | 132 | static Lisp_Object Qkill_buffer_hook; |
9397e56f | 133 | static Lisp_Object Qbuffer_list_update_hook; |
1ab256cb | 134 | |
955cbe7b | 135 | static Lisp_Object Qget_file_buffer; |
5fe0b67e | 136 | |
955cbe7b | 137 | static Lisp_Object Qoverlayp; |
52f8ec73 | 138 | |
955cbe7b | 139 | Lisp_Object Qpriority, Qbefore_string, Qafter_string; |
9397e56f | 140 | |
28545e04 | 141 | static Lisp_Object Qevaporate; |
5985d248 | 142 | |
294d215f RS |
143 | Lisp_Object Qmodification_hooks; |
144 | Lisp_Object Qinsert_in_front_hooks; | |
145 | Lisp_Object Qinsert_behind_hooks; | |
146 | ||
fd05c7e9 | 147 | static void alloc_buffer_text (struct buffer *, ptrdiff_t); |
f57e2426 J |
148 | static void free_buffer_text (struct buffer *b); |
149 | static struct Lisp_Overlay * copy_overlays (struct buffer *, struct Lisp_Overlay *); | |
d311d28c | 150 | static void modify_overlay (struct buffer *, ptrdiff_t, ptrdiff_t); |
37ef52bb | 151 | static Lisp_Object buffer_lisp_local_variables (struct buffer *, bool); |
b86af064 | 152 | |
39eb03f1 | 153 | /* These setters are used only in this file, so they can be private. */ |
b0ab8123 | 154 | static void |
39eb03f1 PE |
155 | bset_abbrev_mode (struct buffer *b, Lisp_Object val) |
156 | { | |
157 | b->INTERNAL_FIELD (abbrev_mode) = val; | |
158 | } | |
b0ab8123 | 159 | static void |
39eb03f1 PE |
160 | bset_abbrev_table (struct buffer *b, Lisp_Object val) |
161 | { | |
162 | b->INTERNAL_FIELD (abbrev_table) = val; | |
163 | } | |
b0ab8123 | 164 | static void |
39eb03f1 PE |
165 | bset_auto_fill_function (struct buffer *b, Lisp_Object val) |
166 | { | |
167 | b->INTERNAL_FIELD (auto_fill_function) = val; | |
168 | } | |
b0ab8123 | 169 | static void |
39eb03f1 PE |
170 | bset_auto_save_file_format (struct buffer *b, Lisp_Object val) |
171 | { | |
172 | b->INTERNAL_FIELD (auto_save_file_format) = val; | |
173 | } | |
b0ab8123 | 174 | static void |
39eb03f1 PE |
175 | bset_auto_save_file_name (struct buffer *b, Lisp_Object val) |
176 | { | |
177 | b->INTERNAL_FIELD (auto_save_file_name) = val; | |
178 | } | |
b0ab8123 | 179 | static void |
39eb03f1 PE |
180 | bset_backed_up (struct buffer *b, Lisp_Object val) |
181 | { | |
182 | b->INTERNAL_FIELD (backed_up) = val; | |
183 | } | |
b0ab8123 | 184 | static void |
39eb03f1 PE |
185 | bset_begv_marker (struct buffer *b, Lisp_Object val) |
186 | { | |
187 | b->INTERNAL_FIELD (begv_marker) = val; | |
188 | } | |
b0ab8123 | 189 | static void |
39eb03f1 PE |
190 | bset_bidi_display_reordering (struct buffer *b, Lisp_Object val) |
191 | { | |
192 | b->INTERNAL_FIELD (bidi_display_reordering) = val; | |
193 | } | |
b0ab8123 | 194 | static void |
39eb03f1 PE |
195 | bset_buffer_file_coding_system (struct buffer *b, Lisp_Object val) |
196 | { | |
197 | b->INTERNAL_FIELD (buffer_file_coding_system) = val; | |
198 | } | |
b0ab8123 | 199 | static void |
39eb03f1 PE |
200 | bset_cache_long_line_scans (struct buffer *b, Lisp_Object val) |
201 | { | |
202 | b->INTERNAL_FIELD (cache_long_line_scans) = 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 RM |
474 | { |
475 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
476 | Lisp_Object handler; |
477 | ||
b7826503 | 478 | CHECK_STRING (filename); |
1ab256cb RM |
479 | filename = Fexpand_file_name (filename, Qnil); |
480 | ||
5fe0b67e RS |
481 | /* If the file name has special constructs in it, |
482 | call the corresponding file handler. */ | |
a617e913 | 483 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e | 484 | if (!NILP (handler)) |
a59225b1 CY |
485 | { |
486 | Lisp_Object handled_buf = call2 (handler, Qget_file_buffer, | |
487 | filename); | |
488 | return BUFFERP (handled_buf) ? handled_buf : Qnil; | |
489 | } | |
5fe0b67e | 490 | |
7539e11f | 491 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 492 | { |
7539e11f | 493 | buf = Fcdr (XCAR (tail)); |
a7a60ce9 | 494 | if (!BUFFERP (buf)) continue; |
4b4deea2 TT |
495 | if (!STRINGP (BVAR (XBUFFER (buf), filename))) continue; |
496 | tem = Fstring_equal (BVAR (XBUFFER (buf), filename), filename); | |
265a9e55 | 497 | if (!NILP (tem)) |
1ab256cb RM |
498 | return buf; |
499 | } | |
500 | return Qnil; | |
501 | } | |
502 | ||
52e01189 | 503 | Lisp_Object |
d3da34e0 | 504 | get_truename_buffer (register Lisp_Object filename) |
52e01189 RS |
505 | { |
506 | register Lisp_Object tail, buf, tem; | |
507 | ||
7539e11f | 508 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
52e01189 | 509 | { |
7539e11f | 510 | buf = Fcdr (XCAR (tail)); |
52e01189 | 511 | if (!BUFFERP (buf)) continue; |
4b4deea2 TT |
512 | if (!STRINGP (BVAR (XBUFFER (buf), file_truename))) continue; |
513 | tem = Fstring_equal (BVAR (XBUFFER (buf), file_truename), filename); | |
52e01189 RS |
514 | if (!NILP (tem)) |
515 | return buf; | |
516 | } | |
517 | return Qnil; | |
518 | } | |
519 | ||
a7ca3326 | 520 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, |
cd265ca6 MR |
521 | doc: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed. |
522 | If BUFFER-OR-NAME is a string and a live buffer with that name exists, | |
523 | return that buffer. If no such buffer exists, create a new buffer with | |
524 | that name and return it. If BUFFER-OR-NAME starts with a space, the new | |
525 | buffer does not keep undo information. | |
526 | ||
527 | If BUFFER-OR-NAME is a buffer instead of a string, return it as given, | |
528 | even if it is dead. The return value is never nil. */) | |
5842a27b | 529 | (register Lisp_Object buffer_or_name) |
1ab256cb | 530 | { |
cd265ca6 | 531 | register Lisp_Object buffer, name; |
1ab256cb RM |
532 | register struct buffer *b; |
533 | ||
cd265ca6 MR |
534 | buffer = Fget_buffer (buffer_or_name); |
535 | if (!NILP (buffer)) | |
536 | return buffer; | |
1ab256cb | 537 | |
cd265ca6 | 538 | if (SCHARS (buffer_or_name) == 0) |
31cd83e9 KH |
539 | error ("Empty string for buffer name is not allowed"); |
540 | ||
cc648cef | 541 | b = allocate_buffer (); |
1ab256cb | 542 | |
336cd056 RS |
543 | /* An ordinary buffer uses its own struct buffer_text. */ |
544 | b->text = &b->own_text; | |
9928463d DA |
545 | b->base_buffer = NULL; |
546 | /* No one shares the text with us now. */ | |
547 | b->indirections = 0; | |
98a07056 DA |
548 | /* No one shows us now. */ |
549 | b->window_count = 0; | |
336cd056 | 550 | |
1ab256cb | 551 | BUF_GAP_SIZE (b) = 20; |
4d7e6e51 | 552 | block_input (); |
3b06f880 KH |
553 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
554 | anchoring a search. */ | |
b86af064 | 555 | alloc_buffer_text (b, BUF_GAP_SIZE (b) + 1); |
4d7e6e51 | 556 | unblock_input (); |
1ab256cb | 557 | if (! BUF_BEG_ADDR (b)) |
531b0165 | 558 | buffer_memory_full (BUF_GAP_SIZE (b) + 1); |
1ab256cb | 559 | |
cffc6f3b CY |
560 | b->pt = BEG; |
561 | b->begv = BEG; | |
562 | b->zv = BEG; | |
563 | b->pt_byte = BEG_BYTE; | |
564 | b->begv_byte = BEG_BYTE; | |
565 | b->zv_byte = BEG_BYTE; | |
566 | ||
6d70a280 | 567 | BUF_GPT (b) = BEG; |
6d70a280 | 568 | BUF_GPT_BYTE (b) = BEG_BYTE; |
cffc6f3b CY |
569 | |
570 | BUF_Z (b) = BEG; | |
6d70a280 | 571 | BUF_Z_BYTE (b) = BEG_BYTE; |
1ab256cb | 572 | BUF_MODIFF (b) = 1; |
3e145152 | 573 | BUF_CHARS_MODIFF (b) = 1; |
2509d356 | 574 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 | 575 | BUF_SAVE_MODIFF (b) = 1; |
f9e7c67e | 576 | BUF_COMPACT (b) = 1; |
0c94c8d6 | 577 | set_buffer_intervals (b, NULL); |
b5a225b4 GM |
578 | BUF_UNCHANGED_MODIFIED (b) = 1; |
579 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
580 | BUF_END_UNCHANGED (b) = 0; | |
581 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 582 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
2941c447 | 583 | b->text->inhibit_shrinking = 0; |
1ab256cb | 584 | |
28e969dd JB |
585 | b->newline_cache = 0; |
586 | b->width_run_cache = 0; | |
39eb03f1 | 587 | bset_width_table (b, Qnil); |
b5a225b4 | 588 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 589 | |
336cd056 RS |
590 | /* An ordinary buffer normally doesn't need markers |
591 | to handle BEGV and ZV. */ | |
39eb03f1 PE |
592 | bset_pt_marker (b, Qnil); |
593 | bset_begv_marker (b, Qnil); | |
594 | bset_zv_marker (b, Qnil); | |
04ae1b48 | 595 | |
cd265ca6 | 596 | name = Fcopy_sequence (buffer_or_name); |
0c94c8d6 | 597 | set_string_intervals (name, NULL); |
39eb03f1 | 598 | bset_name (b, name); |
04ae1b48 | 599 | |
39eb03f1 | 600 | bset_undo_list (b, SREF (name, 0) != ' ' ? Qnil : Qt); |
1ab256cb RM |
601 | |
602 | reset_buffer (b); | |
13de9290 | 603 | reset_buffer_local_variables (b, 1); |
1ab256cb | 604 | |
39eb03f1 | 605 | bset_mark (b, Fmake_marker ()); |
65745fad | 606 | BUF_MARKERS (b) = NULL; |
1f57cb74 | 607 | |
1ab256cb | 608 | /* Put this in the alist of all live buffers. */ |
cd265ca6 MR |
609 | XSETBUFFER (buffer, b); |
610 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buffer), Qnil)); | |
9397e56f MR |
611 | /* And run buffer-list-update-hook. */ |
612 | if (!NILP (Vrun_hooks)) | |
613 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1ab256cb | 614 | |
cd265ca6 | 615 | return buffer; |
336cd056 RS |
616 | } |
617 | ||
7e9d5818 | 618 | |
04e4cb3a GM |
619 | /* Return a list of overlays which is a copy of the overlay list |
620 | LIST, but for buffer B. */ | |
621 | ||
2410d73a | 622 | static struct Lisp_Overlay * |
d3da34e0 | 623 | copy_overlays (struct buffer *b, struct Lisp_Overlay *list) |
04e4cb3a | 624 | { |
2410d73a | 625 | struct Lisp_Overlay *result = NULL, *tail = NULL; |
04e4cb3a | 626 | |
2410d73a | 627 | for (; list; list = list->next) |
04e4cb3a | 628 | { |
fa691a83 DA |
629 | Lisp_Object overlay, start, end; |
630 | struct Lisp_Marker *m; | |
04e4cb3a | 631 | |
c644523b DA |
632 | eassert (MARKERP (list->start)); |
633 | m = XMARKER (list->start); | |
fa691a83 DA |
634 | start = build_marker (b, m->charpos, m->bytepos); |
635 | XMARKER (start)->insertion_type = m->insertion_type; | |
04e4cb3a | 636 | |
c644523b DA |
637 | eassert (MARKERP (list->end)); |
638 | m = XMARKER (list->end); | |
fa691a83 DA |
639 | end = build_marker (b, m->charpos, m->bytepos); |
640 | XMARKER (end)->insertion_type = m->insertion_type; | |
177c0ea7 | 641 | |
c644523b | 642 | overlay = build_overlay (start, end, Fcopy_sequence (list->plist)); |
2410d73a SM |
643 | if (tail) |
644 | tail = tail->next = XOVERLAY (overlay); | |
645 | else | |
646 | result = tail = XOVERLAY (overlay); | |
04e4cb3a GM |
647 | } |
648 | ||
2410d73a | 649 | return result; |
04e4cb3a | 650 | } |
177c0ea7 | 651 | |
0c94c8d6 PE |
652 | /* Set an appropriate overlay of B. */ |
653 | ||
b0ab8123 | 654 | static void |
0c94c8d6 PE |
655 | set_buffer_overlays_before (struct buffer *b, struct Lisp_Overlay *o) |
656 | { | |
657 | b->overlays_before = o; | |
658 | } | |
659 | ||
b0ab8123 | 660 | static void |
0c94c8d6 PE |
661 | set_buffer_overlays_after (struct buffer *b, struct Lisp_Overlay *o) |
662 | { | |
663 | b->overlays_after = o; | |
664 | } | |
04e4cb3a | 665 | |
7e9d5818 GM |
666 | /* Clone per-buffer values of buffer FROM. |
667 | ||
668 | Buffer TO gets the same per-buffer values as FROM, with the | |
669 | following exceptions: (1) TO's name is left untouched, (2) markers | |
670 | are copied and made to refer to TO, and (3) overlay lists are | |
671 | copied. */ | |
672 | ||
673 | static void | |
d3da34e0 | 674 | clone_per_buffer_values (struct buffer *from, struct buffer *to) |
7e9d5818 | 675 | { |
7e9d5818 GM |
676 | int offset; |
677 | ||
52b852c7 | 678 | FOR_EACH_PER_BUFFER_OBJECT_AT (offset) |
7e9d5818 GM |
679 | { |
680 | Lisp_Object obj; | |
681 | ||
4b7cdc0e SM |
682 | /* Don't touch the `name' which should be unique for every buffer. */ |
683 | if (offset == PER_BUFFER_VAR_OFFSET (name)) | |
684 | continue; | |
685 | ||
4ce60d2e | 686 | obj = per_buffer_value (from, offset); |
ce5b453a | 687 | if (MARKERP (obj) && XMARKER (obj)->buffer == from) |
7e9d5818 GM |
688 | { |
689 | struct Lisp_Marker *m = XMARKER (obj); | |
657924ff DA |
690 | |
691 | obj = build_marker (to, m->charpos, m->bytepos); | |
7e9d5818 | 692 | XMARKER (obj)->insertion_type = m->insertion_type; |
7e9d5818 GM |
693 | } |
694 | ||
4ce60d2e | 695 | set_per_buffer_value (to, offset, obj); |
7e9d5818 GM |
696 | } |
697 | ||
72af86bd | 698 | memcpy (to->local_flags, from->local_flags, sizeof to->local_flags); |
177c0ea7 | 699 | |
0c94c8d6 PE |
700 | set_buffer_overlays_before (to, copy_overlays (to, from->overlays_before)); |
701 | set_buffer_overlays_after (to, copy_overlays (to, from->overlays_after)); | |
02f28bbd | 702 | |
e1688f54 RS |
703 | /* Get (a copy of) the alist of Lisp-level local variables of FROM |
704 | and install that in TO. */ | |
39eb03f1 | 705 | bset_local_var_alist (to, buffer_lisp_local_variables (from, 1)); |
7e9d5818 GM |
706 | } |
707 | ||
cffc6f3b CY |
708 | |
709 | /* If buffer B has markers to record PT, BEGV and ZV when it is not | |
710 | current, update these markers. */ | |
711 | ||
712 | static void | |
713 | record_buffer_markers (struct buffer *b) | |
714 | { | |
715 | if (! NILP (BVAR (b, pt_marker))) | |
716 | { | |
717 | Lisp_Object buffer; | |
718 | ||
719 | eassert (!NILP (BVAR (b, begv_marker))); | |
720 | eassert (!NILP (BVAR (b, zv_marker))); | |
721 | ||
722 | XSETBUFFER (buffer, b); | |
723 | set_marker_both (BVAR (b, pt_marker), buffer, b->pt, b->pt_byte); | |
724 | set_marker_both (BVAR (b, begv_marker), buffer, b->begv, b->begv_byte); | |
725 | set_marker_both (BVAR (b, zv_marker), buffer, b->zv, b->zv_byte); | |
726 | } | |
727 | } | |
728 | ||
729 | ||
730 | /* If buffer B has markers to record PT, BEGV and ZV when it is not | |
731 | current, fetch these values into B->begv etc. */ | |
732 | ||
733 | static void | |
734 | fetch_buffer_markers (struct buffer *b) | |
735 | { | |
736 | if (! NILP (BVAR (b, pt_marker))) | |
737 | { | |
738 | Lisp_Object m; | |
739 | ||
740 | eassert (!NILP (BVAR (b, begv_marker))); | |
741 | eassert (!NILP (BVAR (b, zv_marker))); | |
742 | ||
743 | m = BVAR (b, pt_marker); | |
744 | SET_BUF_PT_BOTH (b, marker_position (m), marker_byte_position (m)); | |
745 | ||
746 | m = BVAR (b, begv_marker); | |
747 | SET_BUF_BEGV_BOTH (b, marker_position (m), marker_byte_position (m)); | |
748 | ||
749 | m = BVAR (b, zv_marker); | |
750 | SET_BUF_ZV_BOTH (b, marker_position (m), marker_byte_position (m)); | |
751 | } | |
752 | } | |
753 | ||
754 | ||
7e9d5818 GM |
755 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, |
756 | 2, 3, | |
193c3837 | 757 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 758 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
6b61353c | 759 | BASE-BUFFER should be a live buffer, or the name of an existing buffer. |
018ba359 PJ |
760 | NAME should be a string which is not the name of an existing buffer. |
761 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
762 | such as major and minor modes, in the indirect buffer. | |
7ee72033 | 763 | CLONE nil means the indirect buffer's state is reset to default values. */) |
5842a27b | 764 | (Lisp_Object base_buffer, Lisp_Object name, Lisp_Object clone) |
336cd056 | 765 | { |
6b61353c | 766 | Lisp_Object buf, tem; |
7e9d5818 | 767 | struct buffer *b; |
336cd056 | 768 | |
6b61353c | 769 | CHECK_STRING (name); |
336cd056 RS |
770 | buf = Fget_buffer (name); |
771 | if (!NILP (buf)) | |
d5db4077 | 772 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 | 773 | |
6b61353c | 774 | tem = base_buffer; |
336cd056 RS |
775 | base_buffer = Fget_buffer (base_buffer); |
776 | if (NILP (base_buffer)) | |
6b61353c | 777 | error ("No such buffer: `%s'", SDATA (tem)); |
e578f381 | 778 | if (!BUFFER_LIVE_P (XBUFFER (base_buffer))) |
6b61353c | 779 | error ("Base buffer has been killed"); |
336cd056 | 780 | |
d5db4077 | 781 | if (SCHARS (name) == 0) |
336cd056 RS |
782 | error ("Empty string for buffer name is not allowed"); |
783 | ||
cc648cef | 784 | b = allocate_buffer (); |
336cd056 | 785 | |
9928463d DA |
786 | /* No double indirection - if base buffer is indirect, |
787 | new buffer becomes an indirect to base's base. */ | |
67ee9f6e SM |
788 | b->base_buffer = (XBUFFER (base_buffer)->base_buffer |
789 | ? XBUFFER (base_buffer)->base_buffer | |
790 | : XBUFFER (base_buffer)); | |
336cd056 RS |
791 | |
792 | /* Use the base buffer's text object. */ | |
793 | b->text = b->base_buffer->text; | |
9928463d DA |
794 | /* We have no own text. */ |
795 | b->indirections = -1; | |
796 | /* Notify base buffer that we share the text now. */ | |
797 | b->base_buffer->indirections++; | |
98a07056 DA |
798 | /* Always -1 for an indirect buffer. */ |
799 | b->window_count = -1; | |
336cd056 | 800 | |
cffc6f3b CY |
801 | b->pt = b->base_buffer->pt; |
802 | b->begv = b->base_buffer->begv; | |
803 | b->zv = b->base_buffer->zv; | |
804 | b->pt_byte = b->base_buffer->pt_byte; | |
805 | b->begv_byte = b->base_buffer->begv_byte; | |
806 | b->zv_byte = b->base_buffer->zv_byte; | |
336cd056 RS |
807 | |
808 | b->newline_cache = 0; | |
809 | b->width_run_cache = 0; | |
39eb03f1 | 810 | bset_width_table (b, Qnil); |
336cd056 | 811 | |
336cd056 | 812 | name = Fcopy_sequence (name); |
0c94c8d6 | 813 | set_string_intervals (name, NULL); |
39eb03f1 | 814 | bset_name (b, name); |
336cd056 RS |
815 | |
816 | reset_buffer (b); | |
13de9290 | 817 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
818 | |
819 | /* Put this in the alist of all live buffers. */ | |
820 | XSETBUFFER (buf, b); | |
821 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
822 | ||
39eb03f1 | 823 | bset_mark (b, Fmake_marker ()); |
336cd056 | 824 | |
abc9d959 | 825 | /* The multibyte status belongs to the base buffer. */ |
39eb03f1 PE |
826 | bset_enable_multibyte_characters |
827 | (b, BVAR (b->base_buffer, enable_multibyte_characters)); | |
abc9d959 | 828 | |
336cd056 | 829 | /* Make sure the base buffer has markers for its narrowing. */ |
4b4deea2 | 830 | if (NILP (BVAR (b->base_buffer, pt_marker))) |
336cd056 | 831 | { |
2aa46d6c CY |
832 | eassert (NILP (BVAR (b->base_buffer, begv_marker))); |
833 | eassert (NILP (BVAR (b->base_buffer, zv_marker))); | |
cffc6f3b | 834 | |
39eb03f1 PE |
835 | bset_pt_marker (b->base_buffer, |
836 | build_marker (b->base_buffer, b->base_buffer->pt, | |
837 | b->base_buffer->pt_byte)); | |
657924ff | 838 | |
39eb03f1 PE |
839 | bset_begv_marker (b->base_buffer, |
840 | build_marker (b->base_buffer, b->base_buffer->begv, | |
841 | b->base_buffer->begv_byte)); | |
cffc6f3b | 842 | |
39eb03f1 PE |
843 | bset_zv_marker (b->base_buffer, |
844 | build_marker (b->base_buffer, b->base_buffer->zv, | |
845 | b->base_buffer->zv_byte)); | |
cffc6f3b | 846 | |
4b4deea2 | 847 | XMARKER (BVAR (b->base_buffer, zv_marker))->insertion_type = 1; |
336cd056 RS |
848 | } |
849 | ||
7e9d5818 GM |
850 | if (NILP (clone)) |
851 | { | |
852 | /* Give the indirect buffer markers for its narrowing. */ | |
39eb03f1 PE |
853 | bset_pt_marker (b, build_marker (b, b->pt, b->pt_byte)); |
854 | bset_begv_marker (b, build_marker (b, b->begv, b->begv_byte)); | |
855 | bset_zv_marker (b, build_marker (b, b->zv, b->zv_byte)); | |
4b4deea2 | 856 | XMARKER (BVAR (b, zv_marker))->insertion_type = 1; |
7e9d5818 GM |
857 | } |
858 | else | |
7fa57e45 RS |
859 | { |
860 | struct buffer *old_b = current_buffer; | |
861 | ||
862 | clone_per_buffer_values (b->base_buffer, b); | |
39eb03f1 PE |
863 | bset_filename (b, Qnil); |
864 | bset_file_truename (b, Qnil); | |
865 | bset_display_count (b, make_number (0)); | |
866 | bset_backed_up (b, Qnil); | |
867 | bset_auto_save_file_name (b, Qnil); | |
7fa57e45 RS |
868 | set_buffer_internal_1 (b); |
869 | Fset (intern ("buffer-save-without-query"), Qnil); | |
870 | Fset (intern ("buffer-file-number"), Qnil); | |
871 | Fset (intern ("buffer-stale-function"), Qnil); | |
872 | set_buffer_internal_1 (old_b); | |
873 | } | |
336cd056 | 874 | |
9397e56f MR |
875 | /* Run buffer-list-update-hook. */ |
876 | if (!NILP (Vrun_hooks)) | |
877 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
878 | ||
a9ee7a59 | 879 | return buf; |
1ab256cb RM |
880 | } |
881 | ||
041a49a6 DA |
882 | /* Mark OV as no longer associated with B. */ |
883 | ||
884 | static void | |
885 | drop_overlay (struct buffer *b, struct Lisp_Overlay *ov) | |
886 | { | |
c644523b DA |
887 | eassert (b == XBUFFER (Fmarker_buffer (ov->start))); |
888 | modify_overlay (b, marker_position (ov->start), | |
889 | marker_position (ov->end)); | |
890 | Fset_marker (ov->start, Qnil, Qnil); | |
891 | Fset_marker (ov->end, Qnil, Qnil); | |
041a49a6 DA |
892 | |
893 | } | |
894 | ||
895 | /* Delete all overlays of B and reset it's overlay lists. */ | |
896 | ||
d4f5719a | 897 | void |
d3da34e0 | 898 | delete_all_overlays (struct buffer *b) |
d4f5719a | 899 | { |
041a49a6 | 900 | struct Lisp_Overlay *ov, *next; |
d4f5719a | 901 | |
389a94a5 SM |
902 | /* FIXME: Since each drop_overlay will scan BUF_MARKERS to unlink its |
903 | markers, we have an unneeded O(N^2) behavior here. */ | |
fd318b54 | 904 | for (ov = b->overlays_before; ov; ov = next) |
d4f5719a | 905 | { |
041a49a6 DA |
906 | drop_overlay (b, ov); |
907 | next = ov->next; | |
908 | ov->next = NULL; | |
d4f5719a | 909 | } |
041a49a6 | 910 | |
fd318b54 | 911 | for (ov = b->overlays_after; ov; ov = next) |
d4f5719a | 912 | { |
041a49a6 DA |
913 | drop_overlay (b, ov); |
914 | next = ov->next; | |
915 | ov->next = NULL; | |
d4f5719a | 916 | } |
041a49a6 | 917 | |
0c94c8d6 PE |
918 | set_buffer_overlays_before (b, NULL); |
919 | set_buffer_overlays_after (b, NULL); | |
d4f5719a SM |
920 | } |
921 | ||
bcd40520 | 922 | /* Reinitialize everything about a buffer except its name and contents |
6b61353c | 923 | and local variables. |
d4f5719a SM |
924 | If called on an already-initialized buffer, the list of overlays |
925 | should be deleted before calling this function, otherwise we end up | |
926 | with overlays that claim to belong to the buffer but the buffer | |
927 | claims it doesn't belong to it. */ | |
1ab256cb RM |
928 | |
929 | void | |
d3da34e0 | 930 | reset_buffer (register struct buffer *b) |
1ab256cb | 931 | { |
39eb03f1 PE |
932 | bset_filename (b, Qnil); |
933 | bset_file_truename (b, Qnil); | |
934 | bset_directory (b, current_buffer ? BVAR (current_buffer, directory) : Qnil); | |
e9a9ae03 | 935 | b->modtime = make_emacs_time (0, UNKNOWN_MODTIME_NSECS); |
58b963f7 | 936 | b->modtime_size = -1; |
4b4deea2 | 937 | XSETFASTINT (BVAR (b, save_length), 0); |
1ab256cb | 938 | b->last_window_start = 1; |
8b264726 | 939 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
940 | b->clip_changed = 0; |
941 | b->prevent_redisplay_optimizations_p = 1; | |
39eb03f1 | 942 | bset_backed_up (b, Qnil); |
0b5397c2 | 943 | BUF_AUTOSAVE_MODIFF (b) = 0; |
d311d28c | 944 | b->auto_save_failure_time = 0; |
39eb03f1 PE |
945 | bset_auto_save_file_name (b, Qnil); |
946 | bset_read_only (b, Qnil); | |
0c94c8d6 PE |
947 | set_buffer_overlays_before (b, NULL); |
948 | set_buffer_overlays_after (b, NULL); | |
c2d5b10f | 949 | b->overlay_center = BEG; |
39eb03f1 PE |
950 | bset_mark_active (b, Qnil); |
951 | bset_point_before_scroll (b, Qnil); | |
952 | bset_file_format (b, Qnil); | |
953 | bset_auto_save_file_format (b, Qt); | |
954 | bset_last_selected_window (b, Qnil); | |
955 | bset_display_count (b, make_number (0)); | |
956 | bset_display_time (b, Qnil); | |
957 | bset_enable_multibyte_characters | |
958 | (b, BVAR (&buffer_defaults, enable_multibyte_characters)); | |
959 | bset_cursor_type (b, BVAR (&buffer_defaults, cursor_type)); | |
960 | bset_extra_line_spacing (b, BVAR (&buffer_defaults, extra_line_spacing)); | |
0522997d RS |
961 | |
962 | b->display_error_modiff = 0; | |
1ab256cb RM |
963 | } |
964 | ||
bcd40520 RS |
965 | /* Reset buffer B's local variables info. |
966 | Don't use this on a buffer that has already been in use; | |
967 | it does not treat permanent locals consistently. | |
13de9290 RS |
968 | Instead, use Fkill_all_local_variables. |
969 | ||
37ef52bb PE |
970 | If PERMANENT_TOO, reset permanent buffer-local variables. |
971 | If not, preserve those. */ | |
bcd40520 | 972 | |
13de9290 | 973 | static void |
37ef52bb | 974 | reset_buffer_local_variables (struct buffer *b, bool permanent_too) |
1ab256cb | 975 | { |
37ef52bb | 976 | int offset, i; |
1ab256cb RM |
977 | |
978 | /* Reset the major mode to Fundamental, together with all the | |
979 | things that depend on the major mode. | |
980 | default-major-mode is handled at a higher level. | |
981 | We ignore it here. */ | |
39eb03f1 PE |
982 | bset_major_mode (b, Qfundamental_mode); |
983 | bset_keymap (b, Qnil); | |
984 | bset_mode_name (b, QSFundamental); | |
985 | bset_minor_modes (b, Qnil); | |
3446af9c RS |
986 | |
987 | /* If the standard case table has been altered and invalidated, | |
988 | fix up its insides first. */ | |
989 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
990 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
991 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
992 | Fset_standard_case_table (Vascii_downcase_table); | |
993 | ||
39eb03f1 PE |
994 | bset_downcase_table (b, Vascii_downcase_table); |
995 | bset_upcase_table (b, XCHAR_TABLE (Vascii_downcase_table)->extras[0]); | |
996 | bset_case_canon_table (b, XCHAR_TABLE (Vascii_downcase_table)->extras[1]); | |
997 | bset_case_eqv_table (b, XCHAR_TABLE (Vascii_downcase_table)->extras[2]); | |
998 | bset_invisibility_spec (b, Qt); | |
3cb719bd | 999 | |
13de9290 | 1000 | /* Reset all (or most) per-buffer variables to their defaults. */ |
3709505e | 1001 | if (permanent_too) |
39eb03f1 | 1002 | bset_local_var_alist (b, Qnil); |
3709505e SM |
1003 | else |
1004 | { | |
2f7a359d | 1005 | Lisp_Object tmp, prop, last = Qnil; |
4b4deea2 | 1006 | for (tmp = BVAR (b, local_var_alist); CONSP (tmp); tmp = XCDR (tmp)) |
ce5b453a | 1007 | if (!NILP (prop = Fget (XCAR (XCAR (tmp)), Qpermanent_local))) |
2f7a359d RS |
1008 | { |
1009 | /* If permanent-local, keep it. */ | |
1010 | last = tmp; | |
1011 | if (EQ (prop, Qpermanent_local_hook)) | |
1012 | { | |
1013 | /* This is a partially permanent hook variable. | |
1014 | Preserve only the elements that want to be preserved. */ | |
1015 | Lisp_Object list, newlist; | |
1016 | list = XCDR (XCAR (tmp)); | |
1017 | if (!CONSP (list)) | |
1018 | newlist = list; | |
1019 | else | |
1020 | for (newlist = Qnil; CONSP (list); list = XCDR (list)) | |
1021 | { | |
1022 | Lisp_Object elt = XCAR (list); | |
1023 | /* Preserve element ELT if it's t, | |
1024 | if it is a function with a `permanent-local-hook' property, | |
1025 | or if it's not a symbol. */ | |
1026 | if (! SYMBOLP (elt) | |
1027 | || EQ (elt, Qt) | |
1028 | || !NILP (Fget (elt, Qpermanent_local_hook))) | |
1029 | newlist = Fcons (elt, newlist); | |
1030 | } | |
1031 | XSETCDR (XCAR (tmp), Fnreverse (newlist)); | |
1032 | } | |
1033 | } | |
1034 | /* Delete this local variable. */ | |
3709505e | 1035 | else if (NILP (last)) |
39eb03f1 | 1036 | bset_local_var_alist (b, XCDR (tmp)); |
3709505e SM |
1037 | else |
1038 | XSETCDR (last, XCDR (tmp)); | |
1039 | } | |
1040 | ||
7313acd0 | 1041 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 1042 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 1043 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb | 1044 | |
36429c89 | 1045 | /* For each slot that has a default value, copy that into the slot. */ |
52b852c7 | 1046 | FOR_EACH_PER_BUFFER_OBJECT_AT (offset) |
aab80822 | 1047 | { |
7313acd0 | 1048 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
1049 | if ((idx > 0 |
1050 | && (permanent_too | |
ce5b453a | 1051 | || buffer_permanent_local_flags[idx] == 0))) |
4ce60d2e | 1052 | set_per_buffer_value (b, offset, per_buffer_default (offset)); |
aab80822 | 1053 | } |
1ab256cb RM |
1054 | } |
1055 | ||
01050cb5 RM |
1056 | /* We split this away from generate-new-buffer, because rename-buffer |
1057 | and set-visited-file-name ought to be able to use this to really | |
1058 | rename the buffer properly. */ | |
1059 | ||
a7ca3326 | 1060 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, |
16a97296 | 1061 | Sgenerate_new_buffer_name, 1, 2, 0, |
7ee72033 | 1062 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
1063 | If there is no live buffer named NAME, then return NAME. |
1064 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
6b61353c | 1065 | \(starting at 2) until an unused name is found, and then return that name. |
2f064abf | 1066 | Optional second argument IGNORE specifies a name that is okay to use (if |
8e4fd1e1 GM |
1067 | it is in the sequence to be tried) even if a buffer with that name exists. |
1068 | ||
1069 | If NAME begins with a space (i.e., a buffer that is not normally | |
1070 | visible to users), then if buffer NAME already exists a random number | |
1071 | is first appended to NAME, to speed up finding a non-existent buffer. */) | |
5842a27b | 1072 | (register Lisp_Object name, Lisp_Object ignore) |
1ab256cb | 1073 | { |
8e4fd1e1 | 1074 | register Lisp_Object gentemp, tem, tem2; |
d311d28c PE |
1075 | ptrdiff_t count; |
1076 | char number[INT_BUFSIZE_BOUND (ptrdiff_t) + sizeof "<>"]; | |
1ab256cb | 1077 | |
b7826503 | 1078 | CHECK_STRING (name); |
1ab256cb | 1079 | |
6b61353c KH |
1080 | tem = Fstring_equal (name, ignore); |
1081 | if (!NILP (tem)) | |
1082 | return name; | |
1ab256cb | 1083 | tem = Fget_buffer (name); |
265a9e55 | 1084 | if (NILP (tem)) |
01050cb5 | 1085 | return name; |
1ab256cb | 1086 | |
8e4fd1e1 GM |
1087 | if (!strncmp (SSDATA (name), " ", 1)) /* see bug#1229 */ |
1088 | { | |
1089 | /* Note fileio.c:make_temp_name does random differently. */ | |
a8290ec3 | 1090 | tem2 = concat2 (name, make_formatted_string |
52b852c7 | 1091 | (number, "-%"pI"d", |
a8290ec3 | 1092 | XFASTINT (Frandom (make_number (999999))))); |
8e4fd1e1 GM |
1093 | tem = Fget_buffer (tem2); |
1094 | if (NILP (tem)) | |
1095 | return tem2; | |
1096 | } | |
1097 | else | |
1098 | tem2 = name; | |
1099 | ||
1ab256cb RM |
1100 | count = 1; |
1101 | while (1) | |
1102 | { | |
a8290ec3 DA |
1103 | gentemp = concat2 (tem2, make_formatted_string |
1104 | (number, "<%"pD"d>", ++count)); | |
638e4fc3 | 1105 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
1106 | if (!NILP (tem)) |
1107 | return gentemp; | |
1ab256cb | 1108 | tem = Fget_buffer (gentemp); |
265a9e55 | 1109 | if (NILP (tem)) |
01050cb5 | 1110 | return gentemp; |
1ab256cb RM |
1111 | } |
1112 | } | |
1113 | ||
1114 | \f | |
a7ca3326 | 1115 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, |
7ee72033 | 1116 | doc: /* Return the name of BUFFER, as a string. |
35f5c1d2 JB |
1117 | BUFFER defaults to the current buffer. |
1118 | Return nil if BUFFER has been killed. */) | |
5842a27b | 1119 | (register Lisp_Object buffer) |
1ab256cb | 1120 | { |
265a9e55 | 1121 | if (NILP (buffer)) |
4b4deea2 | 1122 | return BVAR (current_buffer, name); |
b7826503 | 1123 | CHECK_BUFFER (buffer); |
4b4deea2 | 1124 | return BVAR (XBUFFER (buffer), name); |
1ab256cb RM |
1125 | } |
1126 | ||
a7ca3326 | 1127 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, |
7ee72033 MB |
1128 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
1129 | No argument or nil as argument means use the current buffer. */) | |
5842a27b | 1130 | (register Lisp_Object buffer) |
1ab256cb | 1131 | { |
265a9e55 | 1132 | if (NILP (buffer)) |
4b4deea2 | 1133 | return BVAR (current_buffer, filename); |
b7826503 | 1134 | CHECK_BUFFER (buffer); |
4b4deea2 | 1135 | return BVAR (XBUFFER (buffer), filename); |
1ab256cb RM |
1136 | } |
1137 | ||
336cd056 RS |
1138 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
1139 | 0, 1, 0, | |
7ee72033 | 1140 | doc: /* Return the base buffer of indirect buffer BUFFER. |
5a72efd4 LT |
1141 | If BUFFER is not indirect, return nil. |
1142 | BUFFER defaults to the current buffer. */) | |
5842a27b | 1143 | (register Lisp_Object buffer) |
336cd056 RS |
1144 | { |
1145 | struct buffer *base; | |
1146 | Lisp_Object base_buffer; | |
1147 | ||
1148 | if (NILP (buffer)) | |
1149 | base = current_buffer->base_buffer; | |
1150 | else | |
1151 | { | |
b7826503 | 1152 | CHECK_BUFFER (buffer); |
336cd056 RS |
1153 | base = XBUFFER (buffer)->base_buffer; |
1154 | } | |
1155 | ||
1156 | if (! base) | |
1157 | return Qnil; | |
1158 | XSETBUFFER (base_buffer, base); | |
1159 | return base_buffer; | |
1160 | } | |
1161 | ||
a7ca3326 | 1162 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
177c0ea7 | 1163 | Sbuffer_local_value, 2, 2, 0, |
79aa712d RS |
1164 | doc: /* Return the value of VARIABLE in BUFFER. |
1165 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
5e2ad10b | 1166 | is the default binding of the variable. */) |
5842a27b | 1167 | (register Lisp_Object variable, register Lisp_Object buffer) |
5f2c76c6 CY |
1168 | { |
1169 | register Lisp_Object result = buffer_local_value_1 (variable, buffer); | |
1170 | ||
1171 | if (EQ (result, Qunbound)) | |
1172 | xsignal1 (Qvoid_variable, variable); | |
1173 | ||
1174 | return result; | |
1175 | } | |
1176 | ||
1177 | ||
1178 | /* Like Fbuffer_local_value, but return Qunbound if the variable is | |
1179 | locally unbound. */ | |
1180 | ||
1181 | Lisp_Object | |
1182 | buffer_local_value_1 (Lisp_Object variable, Lisp_Object buffer) | |
79aa712d RS |
1183 | { |
1184 | register struct buffer *buf; | |
1185 | register Lisp_Object result; | |
ad97b375 | 1186 | struct Lisp_Symbol *sym; |
79aa712d | 1187 | |
5e2ad10b | 1188 | CHECK_SYMBOL (variable); |
ae69175b | 1189 | CHECK_BUFFER (buffer); |
79aa712d | 1190 | buf = XBUFFER (buffer); |
ce5b453a | 1191 | sym = XSYMBOL (variable); |
79aa712d | 1192 | |
ce5b453a SM |
1193 | start: |
1194 | switch (sym->redirect) | |
f0bac7de | 1195 | { |
ce5b453a SM |
1196 | case SYMBOL_VARALIAS: sym = indirect_variable (sym); goto start; |
1197 | case SYMBOL_PLAINVAL: result = SYMBOL_VAL (sym); break; | |
1198 | case SYMBOL_LOCALIZED: | |
1199 | { /* Look in local_var_alist. */ | |
1200 | struct Lisp_Buffer_Local_Value *blv = SYMBOL_BLV (sym); | |
1201 | XSETSYMBOL (variable, sym); /* Update In case of aliasing. */ | |
4b4deea2 | 1202 | result = Fassoc (variable, BVAR (buf, local_var_alist)); |
ce5b453a SM |
1203 | if (!NILP (result)) |
1204 | { | |
1205 | if (blv->fwd) | |
1206 | { /* What binding is loaded right now? */ | |
1207 | Lisp_Object current_alist_element = blv->valcell; | |
f0bac7de | 1208 | |
ce5b453a SM |
1209 | /* The value of the currently loaded binding is not |
1210 | stored in it, but rather in the realvalue slot. | |
1211 | Store that value into the binding it belongs to | |
1212 | in case that is the one we are about to use. */ | |
f0bac7de | 1213 | |
ce5b453a SM |
1214 | XSETCDR (current_alist_element, |
1215 | do_symval_forwarding (blv->fwd)); | |
1216 | } | |
1217 | /* Now get the (perhaps updated) value out of the binding. */ | |
1218 | result = XCDR (result); | |
1219 | } | |
1220 | else | |
1221 | result = Fdefault_value (variable); | |
1222 | break; | |
1223 | } | |
1224 | case SYMBOL_FORWARDED: | |
1225 | { | |
1226 | union Lisp_Fwd *fwd = SYMBOL_FWD (sym); | |
1227 | if (BUFFER_OBJFWDP (fwd)) | |
4ce60d2e | 1228 | result = per_buffer_value (buf, XBUFFER_OBJFWD (fwd)->offset); |
ce5b453a SM |
1229 | else |
1230 | result = Fdefault_value (variable); | |
1231 | break; | |
1232 | } | |
1088b922 | 1233 | default: emacs_abort (); |
f0bac7de | 1234 | } |
79aa712d | 1235 | |
5f2c76c6 | 1236 | return result; |
79aa712d RS |
1237 | } |
1238 | ||
e1688f54 | 1239 | /* Return an alist of the Lisp-level buffer-local bindings of |
7fa57e45 | 1240 | buffer BUF. That is, don't include the variables maintained |
8a05d57a | 1241 | in special slots in the buffer object. |
37ef52bb | 1242 | If not CLONE, replace elements of the form (VAR . unbound) |
8a05d57a | 1243 | by VAR. */ |
e1688f54 RS |
1244 | |
1245 | static Lisp_Object | |
37ef52bb | 1246 | buffer_lisp_local_variables (struct buffer *buf, bool clone) |
e1688f54 RS |
1247 | { |
1248 | Lisp_Object result = Qnil; | |
37ef52bb | 1249 | Lisp_Object tail; |
4b4deea2 | 1250 | for (tail = BVAR (buf, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
e1688f54 RS |
1251 | { |
1252 | Lisp_Object val, elt; | |
1253 | ||
1254 | elt = XCAR (tail); | |
1255 | ||
1256 | /* Reference each variable in the alist in buf. | |
1257 | If inquiring about the current buffer, this gets the current values, | |
1258 | so store them into the alist so the alist is up to date. | |
1259 | If inquiring about some other buffer, this swaps out any values | |
1260 | for that buffer, making the alist up to date automatically. */ | |
1261 | val = find_symbol_value (XCAR (elt)); | |
1262 | /* Use the current buffer value only if buf is the current buffer. */ | |
1263 | if (buf != current_buffer) | |
1264 | val = XCDR (elt); | |
1265 | ||
8a05d57a | 1266 | result = Fcons (!clone && EQ (val, Qunbound) |
0992bd9c CY |
1267 | ? XCAR (elt) |
1268 | : Fcons (XCAR (elt), val), | |
1269 | result); | |
e1688f54 RS |
1270 | } |
1271 | ||
1272 | return result; | |
1273 | } | |
1274 | ||
1ab256cb | 1275 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 1276 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 1277 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
1278 | Most elements look like (SYMBOL . VALUE), describing one variable. |
1279 | For a symbol that is locally unbound, just the symbol appears in the value. | |
1280 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 | 1281 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1282 | (register Lisp_Object buffer) |
1ab256cb RM |
1283 | { |
1284 | register struct buffer *buf; | |
553defa4 | 1285 | register Lisp_Object result; |
1ab256cb | 1286 | |
265a9e55 | 1287 | if (NILP (buffer)) |
1ab256cb RM |
1288 | buf = current_buffer; |
1289 | else | |
1290 | { | |
b7826503 | 1291 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1292 | buf = XBUFFER (buffer); |
1293 | } | |
1294 | ||
8a05d57a | 1295 | result = buffer_lisp_local_variables (buf, 0); |
1ab256cb | 1296 | |
1ab256cb RM |
1297 | /* Add on all the variables stored in special slots. */ |
1298 | { | |
7c02e886 | 1299 | int offset, idx; |
1ab256cb | 1300 | |
52b852c7 | 1301 | FOR_EACH_PER_BUFFER_OBJECT_AT (offset) |
1ab256cb | 1302 | { |
7313acd0 GM |
1303 | idx = PER_BUFFER_IDX (offset); |
1304 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
1305 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
0992bd9c CY |
1306 | { |
1307 | Lisp_Object sym = PER_BUFFER_SYMBOL (offset); | |
4ce60d2e | 1308 | Lisp_Object val = per_buffer_value (buf, offset); |
0992bd9c CY |
1309 | result = Fcons (EQ (val, Qunbound) ? sym : Fcons (sym, val), |
1310 | result); | |
1311 | } | |
1ab256cb RM |
1312 | } |
1313 | } | |
553defa4 RS |
1314 | |
1315 | return result; | |
1ab256cb | 1316 | } |
1ab256cb | 1317 | \f |
a7ca3326 | 1318 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, |
efc7e75f | 1319 | 0, 1, 0, |
7ee72033 MB |
1320 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
1321 | No argument or nil as argument means use current buffer as BUFFER. */) | |
5842a27b | 1322 | (register Lisp_Object buffer) |
1ab256cb RM |
1323 | { |
1324 | register struct buffer *buf; | |
265a9e55 | 1325 | if (NILP (buffer)) |
1ab256cb RM |
1326 | buf = current_buffer; |
1327 | else | |
1328 | { | |
b7826503 | 1329 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1330 | buf = XBUFFER (buffer); |
1331 | } | |
1332 | ||
336cd056 | 1333 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
1334 | } |
1335 | ||
a7ca3326 | 1336 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, |
efc7e75f | 1337 | 1, 1, 0, |
7ee72033 MB |
1338 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
1339 | A non-nil FLAG means mark the buffer modified. */) | |
37ef52bb | 1340 | (Lisp_Object flag) |
1ab256cb | 1341 | { |
2944d406 | 1342 | Lisp_Object fn; |
1ab256cb RM |
1343 | |
1344 | #ifdef CLASH_DETECTION | |
1345 | /* If buffer becoming modified, lock the file. | |
1346 | If buffer becoming unmodified, unlock the file. */ | |
1347 | ||
82f8cd94 CY |
1348 | struct buffer *b = current_buffer->base_buffer |
1349 | ? current_buffer->base_buffer | |
1350 | : current_buffer; | |
1351 | ||
1352 | fn = BVAR (b, file_truename); | |
90d456d2 | 1353 | /* Test buffer-file-name so that binding it to nil is effective. */ |
82f8cd94 | 1354 | if (!NILP (fn) && ! NILP (BVAR (b, filename))) |
1ab256cb | 1355 | { |
37ef52bb | 1356 | bool already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1357 | if (!already && !NILP (flag)) |
1ab256cb | 1358 | lock_file (fn); |
265a9e55 | 1359 | else if (already && NILP (flag)) |
1ab256cb RM |
1360 | unlock_file (fn); |
1361 | } | |
1362 | #endif /* CLASH_DETECTION */ | |
1363 | ||
0b5397c2 SM |
1364 | /* Here we have a problem. SAVE_MODIFF is used here to encode |
1365 | buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as | |
1366 | recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we | |
1367 | modify SAVE_MODIFF to affect one, we may affect the other | |
1368 | as well. | |
1369 | E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but | |
1370 | if SAVE_MODIFF<auto_save_modified that means we risk changing | |
1371 | recent-auto-save-p from t to nil. | |
1372 | Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified | |
1373 | we risk changing recent-auto-save-p from nil to t. */ | |
1374 | SAVE_MODIFF = (NILP (flag) | |
1375 | /* FIXME: This unavoidably sets recent-auto-save-p to nil. */ | |
1376 | ? MODIFF | |
1377 | /* Let's try to preserve recent-auto-save-p. */ | |
1378 | : SAVE_MODIFF < MODIFF ? SAVE_MODIFF | |
1379 | /* If SAVE_MODIFF == auto_save_modified == MODIFF, | |
1380 | we can either decrease SAVE_MODIFF and auto_save_modified | |
1381 | or increase MODIFF. */ | |
1382 | : MODIFF++); | |
177c0ea7 | 1383 | |
8ec01c70 GM |
1384 | /* Set update_mode_lines only if buffer is displayed in some window. |
1385 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1386 | state by recording/restoring the state around blocks of code. | |
1387 | Setting update_mode_lines makes redisplay consider all windows | |
1388 | (on all frames). Stealth fontification of buffers not displayed | |
1389 | would incur additional redisplay costs if we'd set | |
1390 | update_modes_lines unconditionally. | |
1391 | ||
1392 | Ideally, I think there should be another mechanism for fontifying | |
1393 | buffers without "modifying" buffers, or redisplay should be | |
1394 | smarter about updating the `*' in mode lines. --gerd */ | |
2944d406 | 1395 | if (buffer_window_count (current_buffer)) |
d57b83b3 GM |
1396 | { |
1397 | ++update_mode_lines; | |
1398 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
1399 | } | |
177c0ea7 | 1400 | |
1ab256cb RM |
1401 | return flag; |
1402 | } | |
1403 | ||
a8c21b48 GM |
1404 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
1405 | Srestore_buffer_modified_p, 1, 1, 0, | |
42f47086 | 1406 | doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay. |
018ba359 | 1407 | It is not ensured that mode lines will be updated to show the modified |
7ee72033 | 1408 | state of the current buffer. Use with care. */) |
5842a27b | 1409 | (Lisp_Object flag) |
a8c21b48 GM |
1410 | { |
1411 | #ifdef CLASH_DETECTION | |
1412 | Lisp_Object fn; | |
177c0ea7 | 1413 | |
a8c21b48 GM |
1414 | /* If buffer becoming modified, lock the file. |
1415 | If buffer becoming unmodified, unlock the file. */ | |
1416 | ||
4b4deea2 | 1417 | fn = BVAR (current_buffer, file_truename); |
a8c21b48 | 1418 | /* Test buffer-file-name so that binding it to nil is effective. */ |
4b4deea2 | 1419 | if (!NILP (fn) && ! NILP (BVAR (current_buffer, filename))) |
a8c21b48 | 1420 | { |
37ef52bb | 1421 | bool already = SAVE_MODIFF < MODIFF; |
a8c21b48 GM |
1422 | if (!already && !NILP (flag)) |
1423 | lock_file (fn); | |
1424 | else if (already && NILP (flag)) | |
1425 | unlock_file (fn); | |
1426 | } | |
1427 | #endif /* CLASH_DETECTION */ | |
177c0ea7 | 1428 | |
a8c21b48 GM |
1429 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1430 | return flag; | |
1431 | } | |
1432 | ||
1ab256cb | 1433 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1434 | 0, 1, 0, |
7ee72033 | 1435 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
2f064abf JB |
1436 | Each buffer has a tick counter which is incremented each time the |
1437 | text in that buffer is changed. It wraps around occasionally. | |
7ee72033 | 1438 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1439 | (register Lisp_Object buffer) |
1ab256cb RM |
1440 | { |
1441 | register struct buffer *buf; | |
265a9e55 | 1442 | if (NILP (buffer)) |
1ab256cb RM |
1443 | buf = current_buffer; |
1444 | else | |
1445 | { | |
b7826503 | 1446 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1447 | buf = XBUFFER (buffer); |
1448 | } | |
1449 | ||
1450 | return make_number (BUF_MODIFF (buf)); | |
1451 | } | |
3e145152 CY |
1452 | |
1453 | DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick, | |
1454 | Sbuffer_chars_modified_tick, 0, 1, 0, | |
1455 | doc: /* Return BUFFER's character-change tick counter. | |
1456 | Each buffer has a character-change tick counter, which is set to the | |
1457 | value of the buffer's tick counter \(see `buffer-modified-tick'), each | |
1458 | time text in that buffer is inserted or deleted. By comparing the | |
12bd42be | 1459 | values returned by two individual calls of `buffer-chars-modified-tick', |
3e145152 CY |
1460 | you can tell whether a character change occurred in that buffer in |
1461 | between these calls. No argument or nil as argument means use current | |
1462 | buffer as BUFFER. */) | |
5842a27b | 1463 | (register Lisp_Object buffer) |
3e145152 CY |
1464 | { |
1465 | register struct buffer *buf; | |
1466 | if (NILP (buffer)) | |
1467 | buf = current_buffer; | |
1468 | else | |
1469 | { | |
1470 | CHECK_BUFFER (buffer); | |
1471 | buf = XBUFFER (buffer); | |
1472 | } | |
1473 | ||
1474 | return make_number (BUF_CHARS_MODIFF (buf)); | |
1475 | } | |
1ab256cb | 1476 | \f |
01050cb5 | 1477 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
c7d97628 JL |
1478 | "(list (read-string \"Rename buffer (to new name): \" \ |
1479 | nil 'buffer-name-history (buffer-name (current-buffer))) \ | |
1480 | current-prefix-arg)", | |
7ee72033 | 1481 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1482 | If second arg UNIQUE is nil or omitted, it is an error if a |
1483 | buffer named NEWNAME already exists. | |
1484 | If UNIQUE is non-nil, come up with a new name using | |
1485 | `generate-new-buffer-name'. | |
1486 | Interactively, you can set UNIQUE with a prefix argument. | |
1487 | We return the name we actually gave the buffer. | |
7ee72033 | 1488 | This does not change the name of the visited file (if any). */) |
5842a27b | 1489 | (register Lisp_Object newname, Lisp_Object unique) |
1ab256cb RM |
1490 | { |
1491 | register Lisp_Object tem, buf; | |
1492 | ||
b7826503 | 1493 | CHECK_STRING (newname); |
d59698c4 | 1494 | |
d5db4077 | 1495 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1496 | error ("Empty string is invalid as a buffer name"); |
1497 | ||
489c043a | 1498 | tem = Fget_buffer (newname); |
265a9e55 | 1499 | if (!NILP (tem)) |
01050cb5 | 1500 | { |
8801a864 KR |
1501 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1502 | rename the buffer automatically so you can create another | |
1503 | with the original name. It makes UNIQUE equivalent to | |
1504 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1505 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
4b4deea2 | 1506 | return BVAR (current_buffer, name); |
3bd779aa | 1507 | if (!NILP (unique)) |
4b4deea2 | 1508 | newname = Fgenerate_new_buffer_name (newname, BVAR (current_buffer, name)); |
01050cb5 | 1509 | else |
d5db4077 | 1510 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1511 | } |
1ab256cb | 1512 | |
39eb03f1 | 1513 | bset_name (current_buffer, newname); |
76f590d7 JB |
1514 | |
1515 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1516 | any windows displaying current_buffer will stay unchanged. */ | |
1517 | update_mode_lines++; | |
1518 | ||
67180c6a | 1519 | XSETBUFFER (buf, current_buffer); |
489c043a | 1520 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
4b4deea2 TT |
1521 | if (NILP (BVAR (current_buffer, filename)) |
1522 | && !NILP (BVAR (current_buffer, auto_save_file_name))) | |
1ab256cb | 1523 | call0 (intern ("rename-auto-save-file")); |
9397e56f MR |
1524 | |
1525 | /* Run buffer-list-update-hook. */ | |
1526 | if (!NILP (Vrun_hooks)) | |
1527 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1528 | ||
fb5eba9c | 1529 | /* Refetch since that last call may have done GC. */ |
4b4deea2 | 1530 | return BVAR (current_buffer, name); |
1ab256cb RM |
1531 | } |
1532 | ||
ed08365b DA |
1533 | /* True if B can be used as 'other-than-BUFFER' buffer. */ |
1534 | ||
1535 | static bool | |
1536 | candidate_buffer (Lisp_Object b, Lisp_Object buffer) | |
1537 | { | |
1538 | return (BUFFERP (b) && !EQ (b, buffer) | |
1539 | && BUFFER_LIVE_P (XBUFFER (b)) | |
1540 | && !BUFFER_HIDDEN_P (XBUFFER (b))); | |
1541 | } | |
1542 | ||
a7ca3326 | 1543 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1544 | doc: /* Return most recently selected buffer other than BUFFER. |
9397e56f MR |
1545 | Buffers not visible in windows are preferred to visible buffers, unless |
1546 | optional second argument VISIBLE-OK is non-nil. Ignore the argument | |
1547 | BUFFER unless it denotes a live buffer. If the optional third argument | |
1548 | FRAME is non-nil, use that frame's buffer list instead of the selected | |
1549 | frame's buffer list. | |
1550 | ||
1551 | The buffer is found by scanning the selected or specified frame's buffer | |
1552 | list first, followed by the list of all buffers. If no other buffer | |
1553 | exists, return the buffer `*scratch*' (creating it if necessary). */) | |
5842a27b | 1554 | (register Lisp_Object buffer, Lisp_Object visible_ok, Lisp_Object frame) |
1ab256cb | 1555 | { |
d9f07150 DA |
1556 | struct frame *f = decode_any_frame (frame); |
1557 | Lisp_Object tail = f->buffer_list, pred = f->buffer_predicate; | |
1558 | Lisp_Object buf, notsogood = Qnil; | |
1ab256cb | 1559 | |
9397e56f | 1560 | /* Consider buffers that have been seen in the frame first. */ |
9397e56f | 1561 | for (; CONSP (tail); tail = XCDR (tail)) |
7962a441 | 1562 | { |
9397e56f | 1563 | buf = XCAR (tail); |
ed08365b | 1564 | if (candidate_buffer (buf, buffer) |
9397e56f MR |
1565 | /* If the frame has a buffer_predicate, disregard buffers that |
1566 | don't fit the predicate. */ | |
1567 | && (NILP (pred) || !NILP (call1 (pred, buf)))) | |
1568 | { | |
1569 | if (!NILP (visible_ok) | |
1570 | || NILP (Fget_buffer_window (buf, Qvisible))) | |
1571 | return buf; | |
1572 | else if (NILP (notsogood)) | |
1573 | notsogood = buf; | |
1574 | } | |
7962a441 | 1575 | } |
7962a441 | 1576 | |
9397e56f MR |
1577 | /* Consider alist of all buffers next. */ |
1578 | tail = Vbuffer_alist; | |
6d70a280 | 1579 | for (; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1580 | { |
6d70a280 | 1581 | buf = Fcdr (XCAR (tail)); |
ed08365b | 1582 | if (candidate_buffer (buf, buffer) |
9397e56f MR |
1583 | /* If the frame has a buffer_predicate, disregard buffers that |
1584 | don't fit the predicate. */ | |
1585 | && (NILP (pred) || !NILP (call1 (pred, buf)))) | |
1586 | { | |
1587 | if (!NILP (visible_ok) | |
1588 | || NILP (Fget_buffer_window (buf, Qvisible))) | |
1589 | return buf; | |
1590 | else if (NILP (notsogood)) | |
1591 | notsogood = buf; | |
1592 | } | |
1593 | } | |
1594 | ||
1595 | if (!NILP (notsogood)) | |
1596 | return notsogood; | |
1597 | else | |
1598 | { | |
1599 | buf = Fget_buffer (build_string ("*scratch*")); | |
6b61353c | 1600 | if (NILP (buf)) |
04ae1b48 | 1601 | { |
9397e56f MR |
1602 | buf = Fget_buffer_create (build_string ("*scratch*")); |
1603 | Fset_buffer_major_mode (buf); | |
04ae1b48 | 1604 | } |
9397e56f MR |
1605 | return buf; |
1606 | } | |
1607 | } | |
04ae1b48 | 1608 | |
9397e56f MR |
1609 | /* The following function is a safe variant of Fother_buffer: It doesn't |
1610 | pay attention to any frame-local buffer lists, doesn't care about | |
1611 | visibility of buffers, and doesn't evaluate any frame predicates. */ | |
1612 | ||
1613 | Lisp_Object | |
1614 | other_buffer_safely (Lisp_Object buffer) | |
1615 | { | |
9397e56f MR |
1616 | Lisp_Object tail, buf; |
1617 | ||
ed08365b | 1618 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
9397e56f MR |
1619 | { |
1620 | buf = Fcdr (XCAR (tail)); | |
ed08365b | 1621 | if (candidate_buffer (buf, buffer)) |
1ab256cb | 1622 | return buf; |
1ab256cb | 1623 | } |
9397e56f | 1624 | |
dba1a30a GM |
1625 | buf = Fget_buffer (build_string ("*scratch*")); |
1626 | if (NILP (buf)) | |
1627 | { | |
1628 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1629 | Fset_buffer_major_mode (buf); | |
1630 | } | |
9397e56f | 1631 | |
89132f25 | 1632 | return buf; |
1ab256cb RM |
1633 | } |
1634 | \f | |
a7ca3326 | 1635 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
1ab256cb | 1636 | 0, 1, "", |
7ee72033 MB |
1637 | doc: /* Start keeping undo information for buffer BUFFER. |
1638 | No argument or nil as argument means do this for the current buffer. */) | |
5842a27b | 1639 | (register Lisp_Object buffer) |
1ab256cb | 1640 | { |
ffd56f97 | 1641 | Lisp_Object real_buffer; |
1ab256cb | 1642 | |
ffd56f97 | 1643 | if (NILP (buffer)) |
67180c6a | 1644 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1645 | else |
1646 | { | |
ffd56f97 JB |
1647 | real_buffer = Fget_buffer (buffer); |
1648 | if (NILP (real_buffer)) | |
1649 | nsberror (buffer); | |
1ab256cb RM |
1650 | } |
1651 | ||
4b4deea2 | 1652 | if (EQ (BVAR (XBUFFER (real_buffer), undo_list), Qt)) |
39eb03f1 | 1653 | bset_undo_list (XBUFFER (real_buffer), Qnil); |
1ab256cb RM |
1654 | |
1655 | return Qnil; | |
1656 | } | |
1657 | ||
9cd47b72 DA |
1658 | /* Truncate undo list and shrink the gap of BUFFER. */ |
1659 | ||
37ef52bb | 1660 | void |
9cd47b72 DA |
1661 | compact_buffer (struct buffer *buffer) |
1662 | { | |
f0863a54 | 1663 | BUFFER_CHECK_INDIRECTION (buffer); |
9928463d | 1664 | |
9cd47b72 DA |
1665 | /* Skip dead buffers, indirect buffers and buffers |
1666 | which aren't changed since last compaction. */ | |
f0863a54 | 1667 | if (BUFFER_LIVE_P (buffer) |
9cd47b72 | 1668 | && (buffer->base_buffer == NULL) |
f9e7c67e | 1669 | && (BUF_COMPACT (buffer) != BUF_MODIFF (buffer))) |
9cd47b72 DA |
1670 | { |
1671 | /* If a buffer's undo list is Qt, that means that undo is | |
1672 | turned off in that buffer. Calling truncate_undo_list on | |
1673 | Qt tends to return NULL, which effectively turns undo back on. | |
1674 | So don't call truncate_undo_list if undo_list is Qt. */ | |
e34f7f79 | 1675 | if (!EQ (buffer->INTERNAL_FIELD (undo_list), Qt)) |
9cd47b72 DA |
1676 | truncate_undo_list (buffer); |
1677 | ||
1678 | /* Shrink buffer gaps. */ | |
1679 | if (!buffer->text->inhibit_shrinking) | |
1680 | { | |
1681 | /* If a buffer's gap size is more than 10% of the buffer | |
eefd7278 DA |
1682 | size, or larger than GAP_BYTES_DFL bytes, then shrink it |
1683 | accordingly. Keep a minimum size of GAP_BYTES_MIN bytes. */ | |
1684 | ptrdiff_t size = clip_to_bounds (GAP_BYTES_MIN, | |
1685 | BUF_Z_BYTE (buffer) / 10, | |
1686 | GAP_BYTES_DFL); | |
1687 | if (BUF_GAP_SIZE (buffer) > size) | |
1688 | make_gap_1 (buffer, -(BUF_GAP_SIZE (buffer) - size)); | |
9cd47b72 | 1689 | } |
f9e7c67e | 1690 | BUF_COMPACT (buffer) = BUF_MODIFF (buffer); |
9cd47b72 | 1691 | } |
9cd47b72 DA |
1692 | } |
1693 | ||
a7ca3326 | 1694 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 0, 1, "bKill buffer: ", |
b7e8d081 | 1695 | doc: /* Kill the buffer specified by BUFFER-OR-NAME. |
c8804c4f MR |
1696 | The argument may be a buffer or the name of an existing buffer. |
1697 | Argument nil or omitted means kill the current buffer. Return t if the | |
1698 | buffer is actually killed, nil otherwise. | |
1699 | ||
b7e8d081 MR |
1700 | The functions in `kill-buffer-query-functions' are called with the |
1701 | buffer to be killed as the current buffer. If any of them returns nil, | |
1702 | the buffer is not killed. The hook `kill-buffer-hook' is run before the | |
1703 | buffer is actually killed. The buffer being killed will be current | |
1704 | while the hook is running. Functions called by any of these hooks are | |
1705 | supposed to not change the current buffer. | |
018ba359 PJ |
1706 | |
1707 | Any processes that have this buffer as the `process-buffer' are killed | |
b7e8d081 MR |
1708 | with SIGHUP. This function calls `replace-buffer-in-windows' for |
1709 | cleaning up all windows currently displaying the buffer to be killed. */) | |
5842a27b | 1710 | (Lisp_Object buffer_or_name) |
1ab256cb | 1711 | { |
c8804c4f | 1712 | Lisp_Object buffer; |
1ab256cb RM |
1713 | register struct buffer *b; |
1714 | register Lisp_Object tem; | |
1715 | register struct Lisp_Marker *m; | |
6af718a4 | 1716 | struct gcpro gcpro1; |
1ab256cb | 1717 | |
c8804c4f MR |
1718 | if (NILP (buffer_or_name)) |
1719 | buffer = Fcurrent_buffer (); | |
1ab256cb | 1720 | else |
c8804c4f MR |
1721 | buffer = Fget_buffer (buffer_or_name); |
1722 | if (NILP (buffer)) | |
1723 | nsberror (buffer_or_name); | |
1ab256cb | 1724 | |
c8804c4f | 1725 | b = XBUFFER (buffer); |
1ab256cb | 1726 | |
4a4a9db5 | 1727 | /* Avoid trouble for buffer already dead. */ |
e578f381 | 1728 | if (!BUFFER_LIVE_P (b)) |
4a4a9db5 KH |
1729 | return Qnil; |
1730 | ||
1ab256cb | 1731 | /* Query if the buffer is still modified. */ |
4b4deea2 | 1732 | if (INTERACTIVE && !NILP (BVAR (b, filename)) |
336cd056 | 1733 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1734 | { |
c8804c4f | 1735 | GCPRO1 (buffer); |
5c4930b0 | 1736 | tem = do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ", |
4b4deea2 | 1737 | BVAR (b, name), make_number (0))); |
1ab256cb | 1738 | UNGCPRO; |
265a9e55 | 1739 | if (NILP (tem)) |
1ab256cb RM |
1740 | return Qnil; |
1741 | } | |
1742 | ||
dcdffbf6 | 1743 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1744 | { |
d311d28c | 1745 | ptrdiff_t count = SPECPDL_INDEX (); |
5b20caf0 | 1746 | Lisp_Object arglist[1]; |
1ab256cb RM |
1747 | |
1748 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1749 | set_buffer_internal (b); | |
dcdffbf6 RS |
1750 | |
1751 | /* First run the query functions; if any query is answered no, | |
1752 | don't kill the buffer. */ | |
5b20caf0 | 1753 | arglist[0] = Qkill_buffer_query_functions; |
09706e1f KR |
1754 | tem = Frun_hook_with_args_until_failure (1, arglist); |
1755 | if (NILP (tem)) | |
5b20caf0 | 1756 | return unbind_to (count, Qnil); |
dcdffbf6 RS |
1757 | |
1758 | /* Then run the hooks. */ | |
f1597a3a | 1759 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1760 | unbind_to (count, Qnil); |
1761 | } | |
1762 | ||
b7e8d081 | 1763 | /* If the hooks have killed the buffer, exit now. */ |
e578f381 | 1764 | if (!BUFFER_LIVE_P (b)) |
b7e8d081 MR |
1765 | return Qt; |
1766 | ||
1ab256cb RM |
1767 | /* We have no more questions to ask. Verify that it is valid |
1768 | to kill the buffer. This must be done after the questions | |
1769 | since anything can happen within do_yes_or_no_p. */ | |
1770 | ||
1771 | /* Don't kill the minibuffer now current. */ | |
d3d50620 | 1772 | if (EQ (buffer, XWINDOW (minibuf_window)->buffer)) |
1ab256cb RM |
1773 | return Qnil; |
1774 | ||
9928463d DA |
1775 | /* When we kill an ordinary buffer which shares it's buffer text |
1776 | with indirect buffer(s), we must kill indirect buffer(s) too. | |
336cd056 RS |
1777 | We do it at this stage so nothing terrible happens if they |
1778 | ask questions or their hooks get errors. */ | |
9928463d | 1779 | if (!b->base_buffer && b->indirections > 0) |
336cd056 RS |
1780 | { |
1781 | struct buffer *other; | |
1782 | ||
c8804c4f | 1783 | GCPRO1 (buffer); |
336cd056 | 1784 | |
52b852c7 | 1785 | FOR_EACH_BUFFER (other) |
d17337e5 | 1786 | if (other->base_buffer == b) |
336cd056 | 1787 | { |
8f54f30a PE |
1788 | Lisp_Object buf; |
1789 | XSETBUFFER (buf, other); | |
1790 | Fkill_buffer (buf); | |
336cd056 RS |
1791 | } |
1792 | ||
1793 | UNGCPRO; | |
b7e8d081 MR |
1794 | |
1795 | /* Exit if we now have killed the base buffer (Bug#11665). */ | |
e578f381 | 1796 | if (!BUFFER_LIVE_P (b)) |
b7e8d081 | 1797 | return Qt; |
336cd056 | 1798 | } |
177c0ea7 | 1799 | |
56e2e794 MR |
1800 | /* Run replace_buffer_in_windows before making another buffer current |
1801 | since set-window-buffer-start-and-point will refuse to make another | |
1802 | buffer current if the selected window does not show the current | |
1803 | buffer. (Bug#10114) */ | |
1804 | replace_buffer_in_windows (buffer); | |
1805 | ||
b7e8d081 | 1806 | /* Exit if replacing the buffer in windows has killed our buffer. */ |
e578f381 | 1807 | if (!BUFFER_LIVE_P (b)) |
b7e8d081 MR |
1808 | return Qt; |
1809 | ||
1810 | /* Make this buffer not be current. Exit if it is the sole visible | |
1811 | buffer. */ | |
1ab256cb RM |
1812 | if (b == current_buffer) |
1813 | { | |
c8804c4f | 1814 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1ab256cb RM |
1815 | Fset_buffer (tem); |
1816 | if (b == current_buffer) | |
1817 | return Qnil; | |
1818 | } | |
1819 | ||
b7e8d081 MR |
1820 | /* If the buffer now current is shown in the minibuffer and our buffer |
1821 | is the sole other buffer give up. */ | |
77270fac | 1822 | XSETBUFFER (tem, current_buffer); |
d3d50620 | 1823 | if (EQ (tem, XWINDOW (minibuf_window)->buffer) |
b7e8d081 MR |
1824 | && EQ (buffer, Fother_buffer (buffer, Qnil, Qnil))) |
1825 | return Qnil; | |
77270fac | 1826 | |
1ab256cb RM |
1827 | /* Now there is no question: we can kill the buffer. */ |
1828 | ||
1829 | #ifdef CLASH_DETECTION | |
1830 | /* Unlock this buffer's file, if it is locked. */ | |
1831 | unlock_buffer (b); | |
1832 | #endif /* CLASH_DETECTION */ | |
1833 | ||
c8804c4f MR |
1834 | GCPRO1 (buffer); |
1835 | kill_buffer_processes (buffer); | |
49da74e6 KS |
1836 | UNGCPRO; |
1837 | ||
b7e8d081 MR |
1838 | /* Killing buffer processes may run sentinels which may have killed |
1839 | our buffer. */ | |
e578f381 | 1840 | if (!BUFFER_LIVE_P (b)) |
b7e8d081 | 1841 | return Qt; |
49da74e6 | 1842 | |
9397e56f MR |
1843 | /* These may run Lisp code and into infinite loops (if someone |
1844 | insisted on circular lists) so allow quitting here. */ | |
9397e56f MR |
1845 | frames_discard_buffer (buffer); |
1846 | ||
b93fb365 | 1847 | clear_charpos_cache (b); |
1ab256cb RM |
1848 | |
1849 | tem = Vinhibit_quit; | |
1850 | Vinhibit_quit = Qt; | |
9397e56f | 1851 | /* Remove the buffer from the list of all buffers. */ |
c8804c4f | 1852 | Vbuffer_alist = Fdelq (Frassq (buffer, Vbuffer_alist), Vbuffer_alist); |
b7e8d081 | 1853 | /* If replace_buffer_in_windows didn't do its job fix that now. */ |
9397e56f | 1854 | replace_buffer_in_windows_safely (buffer); |
1ab256cb RM |
1855 | Vinhibit_quit = tem; |
1856 | ||
9cf712eb RS |
1857 | /* Delete any auto-save file, if we saved it in this session. |
1858 | But not if the buffer is modified. */ | |
4b4deea2 | 1859 | if (STRINGP (BVAR (b, auto_save_file_name)) |
0b5397c2 SM |
1860 | && BUF_AUTOSAVE_MODIFF (b) != 0 |
1861 | && BUF_SAVE_MODIFF (b) < BUF_AUTOSAVE_MODIFF (b) | |
6b61353c KH |
1862 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
1863 | && NILP (Fsymbol_value (intern ("auto-save-visited-file-name")))) | |
1ab256cb | 1864 | { |
8f54f30a PE |
1865 | Lisp_Object delete; |
1866 | delete = Fsymbol_value (intern ("delete-auto-save-files")); | |
1867 | if (! NILP (delete)) | |
4b4deea2 | 1868 | internal_delete_file (BVAR (b, auto_save_file_name)); |
1ab256cb RM |
1869 | } |
1870 | ||
b7e8d081 | 1871 | /* Deleting an auto-save file could have killed our buffer. */ |
e578f381 | 1872 | if (!BUFFER_LIVE_P (b)) |
b7e8d081 MR |
1873 | return Qt; |
1874 | ||
4a4a9db5 KH |
1875 | if (b->base_buffer) |
1876 | { | |
d556ebf9 DA |
1877 | /* Unchain all markers that belong to this indirect buffer. |
1878 | Don't unchain the markers that belong to the base buffer | |
1879 | or its other indirect buffers. */ | |
1880 | struct Lisp_Marker **mp = &BUF_MARKERS (b); | |
1881 | while ((m = *mp)) | |
1882 | { | |
1883 | if (m->buffer == b) | |
1884 | { | |
1885 | m->buffer = NULL; | |
389a94a5 | 1886 | *mp = m->next; |
d556ebf9 DA |
1887 | } |
1888 | else | |
1889 | mp = &m->next; | |
1890 | } | |
4a4a9db5 KH |
1891 | } |
1892 | else | |
1ab256cb | 1893 | { |
4a4a9db5 | 1894 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1895 | and leave them pointing nowhere. */ |
65745fad | 1896 | for (m = BUF_MARKERS (b); m; ) |
336cd056 | 1897 | { |
65745fad | 1898 | struct Lisp_Marker *next = m->next; |
336cd056 | 1899 | m->buffer = 0; |
65745fad SM |
1900 | m->next = NULL; |
1901 | m = next; | |
336cd056 | 1902 | } |
65745fad | 1903 | BUF_MARKERS (b) = NULL; |
0c94c8d6 | 1904 | set_buffer_intervals (b, NULL); |
336cd056 | 1905 | |
389a94a5 | 1906 | /* Perhaps we should explicitly free the interval tree here... */ |
336cd056 | 1907 | } |
389a94a5 SM |
1908 | /* Since we've unlinked the markers, the overlays can't be here any more |
1909 | either. */ | |
1910 | b->overlays_before = NULL; | |
1911 | b->overlays_after = NULL; | |
33f7013e | 1912 | |
2f3f993b RS |
1913 | /* Reset the local variables, so that this buffer's local values |
1914 | won't be protected from GC. They would be protected | |
e4769531 | 1915 | if they happened to remain cached in their symbols. |
2f3f993b RS |
1916 | This gets rid of them for certain. */ |
1917 | swap_out_buffer_local_variables (b); | |
13de9290 | 1918 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1919 | |
39eb03f1 | 1920 | bset_name (b, Qnil); |
336cd056 | 1921 | |
4d7e6e51 | 1922 | block_input (); |
04e9897c DA |
1923 | if (b->base_buffer) |
1924 | { | |
1925 | /* Notify our base buffer that we don't share the text anymore. */ | |
1926 | eassert (b->indirections == -1); | |
1927 | b->base_buffer->indirections--; | |
1928 | eassert (b->base_buffer->indirections >= 0); | |
98a07056 DA |
1929 | /* Make sure that we wasn't confused. */ |
1930 | eassert (b->window_count == -1); | |
04e9897c DA |
1931 | } |
1932 | else | |
98a07056 DA |
1933 | { |
1934 | /* Make sure that no one shows us. */ | |
1935 | eassert (b->window_count == 0); | |
1936 | /* No one shares our buffer text, can free it. */ | |
1937 | free_buffer_text (b); | |
1938 | } | |
336cd056 | 1939 | |
28e969dd JB |
1940 | if (b->newline_cache) |
1941 | { | |
1942 | free_region_cache (b->newline_cache); | |
1943 | b->newline_cache = 0; | |
1944 | } | |
1945 | if (b->width_run_cache) | |
1946 | { | |
1947 | free_region_cache (b->width_run_cache); | |
1948 | b->width_run_cache = 0; | |
1949 | } | |
39eb03f1 | 1950 | bset_width_table (b, Qnil); |
4d7e6e51 | 1951 | unblock_input (); |
39eb03f1 | 1952 | bset_undo_list (b, Qnil); |
1ab256cb | 1953 | |
9397e56f MR |
1954 | /* Run buffer-list-update-hook. */ |
1955 | if (!NILP (Vrun_hooks)) | |
1956 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1957 | ||
1ab256cb RM |
1958 | return Qt; |
1959 | } | |
1960 | \f | |
9397e56f MR |
1961 | /* Move association for BUFFER to the front of buffer (a)lists. Since |
1962 | we do this each time BUFFER is selected visibly, the more recently | |
1963 | selected buffers are always closer to the front of those lists. This | |
1964 | means that other_buffer is more likely to choose a relevant buffer. | |
1965 | ||
1966 | Note that this moves BUFFER to the front of the buffer lists of the | |
1967 | selected frame even if BUFFER is not shown there. If BUFFER is not | |
1968 | shown in the selected frame, consider the present behavior a feature. | |
1969 | `select-window' gets this right since it shows BUFFER in the selected | |
1970 | window when calling us. */ | |
1ab256cb | 1971 | |
01136e9b | 1972 | void |
9397e56f | 1973 | record_buffer (Lisp_Object buffer) |
1ab256cb | 1974 | { |
4475bec4 | 1975 | Lisp_Object aelt, aelt_cons, tem; |
9397e56f | 1976 | register struct frame *f = XFRAME (selected_frame); |
1ab256cb | 1977 | |
9397e56f | 1978 | CHECK_BUFFER (buffer); |
1ab256cb | 1979 | |
9397e56f MR |
1980 | /* Update Vbuffer_alist (we know that it has an entry for BUFFER). |
1981 | Don't allow quitting since this might leave the buffer list in an | |
1982 | inconsistent state. */ | |
1983 | tem = Vinhibit_quit; | |
1984 | Vinhibit_quit = Qt; | |
1985 | aelt = Frassq (buffer, Vbuffer_alist); | |
4475bec4 | 1986 | aelt_cons = Fmemq (aelt, Vbuffer_alist); |
9397e56f | 1987 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
4475bec4 PE |
1988 | XSETCDR (aelt_cons, Vbuffer_alist); |
1989 | Vbuffer_alist = aelt_cons; | |
9397e56f | 1990 | Vinhibit_quit = tem; |
1ab256cb | 1991 | |
9397e56f | 1992 | /* Update buffer list of selected frame. */ |
f00af5b1 PE |
1993 | fset_buffer_list (f, Fcons (buffer, Fdelq (buffer, f->buffer_list))); |
1994 | fset_buried_buffer_list (f, Fdelq (buffer, f->buried_buffer_list)); | |
177c0ea7 | 1995 | |
9397e56f MR |
1996 | /* Run buffer-list-update-hook. */ |
1997 | if (!NILP (Vrun_hooks)) | |
1998 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1999 | } | |
7962a441 | 2000 | |
7962a441 | 2001 | |
e4ed06f1 CY |
2002 | /* Move BUFFER to the end of the buffer (a)lists. Do nothing if the |
2003 | buffer is killed. For the selected frame's buffer list this moves | |
2004 | BUFFER to its end even if it was never shown in that frame. If | |
96a72ee9 | 2005 | this happens we have a feature, hence `bury-buffer-internal' should be |
e4ed06f1 | 2006 | called only when BUFFER was shown in the selected frame. */ |
7962a441 | 2007 | |
e4ed06f1 CY |
2008 | DEFUN ("bury-buffer-internal", Fbury_buffer_internal, Sbury_buffer_internal, |
2009 | 1, 1, 0, | |
2010 | doc: /* Move BUFFER to the end of the buffer list. */) | |
9397e56f MR |
2011 | (Lisp_Object buffer) |
2012 | { | |
4475bec4 | 2013 | Lisp_Object aelt, aelt_cons, tem; |
9397e56f | 2014 | register struct frame *f = XFRAME (selected_frame); |
7962a441 | 2015 | |
9397e56f | 2016 | CHECK_BUFFER (buffer); |
177c0ea7 | 2017 | |
9397e56f MR |
2018 | /* Update Vbuffer_alist (we know that it has an entry for BUFFER). |
2019 | Don't allow quitting since this might leave the buffer list in an | |
2020 | inconsistent state. */ | |
2021 | tem = Vinhibit_quit; | |
2022 | Vinhibit_quit = Qt; | |
2023 | aelt = Frassq (buffer, Vbuffer_alist); | |
4475bec4 | 2024 | aelt_cons = Fmemq (aelt, Vbuffer_alist); |
9397e56f | 2025 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
4475bec4 PE |
2026 | XSETCDR (aelt_cons, Qnil); |
2027 | Vbuffer_alist = nconc2 (Vbuffer_alist, aelt_cons); | |
9397e56f MR |
2028 | Vinhibit_quit = tem; |
2029 | ||
2030 | /* Update buffer lists of selected frame. */ | |
f00af5b1 PE |
2031 | fset_buffer_list (f, Fdelq (buffer, f->buffer_list)); |
2032 | fset_buried_buffer_list | |
2033 | (f, Fcons (buffer, Fdelq (buffer, f->buried_buffer_list))); | |
9397e56f MR |
2034 | |
2035 | /* Run buffer-list-update-hook. */ | |
2036 | if (!NILP (Vrun_hooks)) | |
2037 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
2038 | ||
e4ed06f1 | 2039 | return Qnil; |
1ab256cb RM |
2040 | } |
2041 | ||
a9ee7a59 | 2042 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 2043 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 2044 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
c1f02afa | 2045 | according to the default value of `major-mode'. |
018ba359 | 2046 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 | 2047 | the current buffer's major mode. */) |
5842a27b | 2048 | (Lisp_Object buffer) |
a9ee7a59 | 2049 | { |
d311d28c | 2050 | ptrdiff_t count; |
a9ee7a59 KH |
2051 | Lisp_Object function; |
2052 | ||
ea4fddd8 JB |
2053 | CHECK_BUFFER (buffer); |
2054 | ||
e578f381 | 2055 | if (!BUFFER_LIVE_P (XBUFFER (buffer))) |
4f2daf31 DA |
2056 | error ("Attempt to set major mode for a dead buffer"); |
2057 | ||
2058 | if (strcmp (SSDATA (BVAR (XBUFFER (buffer), name)), "*scratch*") == 0) | |
71a0f2c6 GM |
2059 | function = find_symbol_value (intern ("initial-major-mode")); |
2060 | else | |
2061 | { | |
4b4deea2 | 2062 | function = BVAR (&buffer_defaults, major_mode); |
71a0f2c6 | 2063 | if (NILP (function) |
4b4deea2 TT |
2064 | && NILP (Fget (BVAR (current_buffer, major_mode), Qmode_class))) |
2065 | function = BVAR (current_buffer, major_mode); | |
71a0f2c6 | 2066 | } |
177c0ea7 | 2067 | |
48265e61 DL |
2068 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
2069 | return Qnil; | |
2070 | ||
aed13378 | 2071 | count = SPECPDL_INDEX (); |
a9ee7a59 | 2072 | |
48265e61 DL |
2073 | /* To select a nonfundamental mode, |
2074 | select the buffer temporarily and then call the mode function. */ | |
a9ee7a59 KH |
2075 | |
2076 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
2077 | ||
a2428fa2 | 2078 | Fset_buffer (buffer); |
48265e61 | 2079 | call0 (function); |
a9ee7a59 KH |
2080 | |
2081 | return unbind_to (count, Qnil); | |
2082 | } | |
2083 | ||
a7ca3326 | 2084 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, |
7ee72033 | 2085 | doc: /* Return the current buffer as a Lisp object. */) |
5842a27b | 2086 | (void) |
1ab256cb RM |
2087 | { |
2088 | register Lisp_Object buf; | |
67180c6a | 2089 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
2090 | return buf; |
2091 | } | |
c7aa5005 KH |
2092 | |
2093 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
2094 | This is used by redisplay. */ | |
2095 | ||
2096 | void | |
d3da34e0 | 2097 | set_buffer_internal_1 (register struct buffer *b) |
c7aa5005 KH |
2098 | { |
2099 | register struct buffer *old_buf; | |
ce5b453a | 2100 | register Lisp_Object tail; |
c7aa5005 | 2101 | |
b86af064 | 2102 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 2103 | if (b->text->beg == NULL) |
b86af064 GM |
2104 | enlarge_buffer_text (b, 0); |
2105 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
177c0ea7 | 2106 | |
c7aa5005 KH |
2107 | if (current_buffer == b) |
2108 | return; | |
2109 | ||
f0863a54 | 2110 | BUFFER_CHECK_INDIRECTION (b); |
68f8f1c0 | 2111 | |
1ab256cb RM |
2112 | old_buf = current_buffer; |
2113 | current_buffer = b; | |
2114 | last_known_column_point = -1; /* invalidate indentation cache */ | |
2115 | ||
336cd056 RS |
2116 | if (old_buf) |
2117 | { | |
2118 | /* Put the undo list back in the base buffer, so that it appears | |
2119 | that an indirect buffer shares the undo list of its base. */ | |
2120 | if (old_buf->base_buffer) | |
39eb03f1 | 2121 | bset_undo_list (old_buf->base_buffer, BVAR (old_buf, undo_list)); |
336cd056 RS |
2122 | |
2123 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
2124 | when it is not current, update them now. */ | |
cffc6f3b | 2125 | record_buffer_markers (old_buf); |
336cd056 RS |
2126 | } |
2127 | ||
2128 | /* Get the undo list from the base buffer, so that it appears | |
2129 | that an indirect buffer shares the undo list of its base. */ | |
2130 | if (b->base_buffer) | |
39eb03f1 | 2131 | bset_undo_list (b, BVAR (b->base_buffer, undo_list)); |
336cd056 RS |
2132 | |
2133 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
2134 | when it is not current, fetch them now. */ | |
cffc6f3b | 2135 | fetch_buffer_markers (b); |
336cd056 | 2136 | |
1ab256cb RM |
2137 | /* Look down buffer's list of local Lisp variables |
2138 | to find and update any that forward into C variables. */ | |
2139 | ||
ce5b453a | 2140 | do |
1ab256cb | 2141 | { |
4b4deea2 | 2142 | for (tail = BVAR (b, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
ce5b453a SM |
2143 | { |
2144 | Lisp_Object var = XCAR (XCAR (tail)); | |
2145 | struct Lisp_Symbol *sym = XSYMBOL (var); | |
2146 | if (sym->redirect == SYMBOL_LOCALIZED /* Just to be sure. */ | |
2147 | && SYMBOL_BLV (sym)->fwd) | |
2148 | /* Just reference the variable | |
2149 | to cause it to become set for this buffer. */ | |
2150 | Fsymbol_value (var); | |
2151 | } | |
1ab256cb | 2152 | } |
1ab256cb | 2153 | /* Do the same with any others that were local to the previous buffer */ |
ce5b453a | 2154 | while (b != old_buf && (b = old_buf, b)); |
1ab256cb RM |
2155 | } |
2156 | ||
336cd056 | 2157 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 2158 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
2159 | |
2160 | void | |
d3da34e0 | 2161 | set_buffer_temp (struct buffer *b) |
336cd056 RS |
2162 | { |
2163 | register struct buffer *old_buf; | |
2164 | ||
2165 | if (current_buffer == b) | |
2166 | return; | |
2167 | ||
2168 | old_buf = current_buffer; | |
2169 | current_buffer = b; | |
2170 | ||
cffc6f3b CY |
2171 | /* If the old current buffer has markers to record PT, BEGV and ZV |
2172 | when it is not current, update them now. */ | |
2173 | record_buffer_markers (old_buf); | |
336cd056 RS |
2174 | |
2175 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
2176 | when it is not current, fetch them now. */ | |
cffc6f3b | 2177 | fetch_buffer_markers (b); |
336cd056 RS |
2178 | } |
2179 | ||
a7ca3326 | 2180 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
c8804c4f MR |
2181 | doc: /* Make buffer BUFFER-OR-NAME current for editing operations. |
2182 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See | |
81749a23 | 2183 | also `with-current-buffer' when you want to make a buffer current |
c8804c4f MR |
2184 | temporarily. This function does not display the buffer, so its effect |
2185 | ends when the current command terminates. Use `switch-to-buffer' or | |
2186 | `pop-to-buffer' to switch buffers permanently. */) | |
5842a27b | 2187 | (register Lisp_Object buffer_or_name) |
1ab256cb | 2188 | { |
c8804c4f MR |
2189 | register Lisp_Object buffer; |
2190 | buffer = Fget_buffer (buffer_or_name); | |
2191 | if (NILP (buffer)) | |
2192 | nsberror (buffer_or_name); | |
e578f381 | 2193 | if (!BUFFER_LIVE_P (XBUFFER (buffer))) |
1ab256cb | 2194 | error ("Selecting deleted buffer"); |
c8804c4f MR |
2195 | set_buffer_internal (XBUFFER (buffer)); |
2196 | return buffer; | |
1ab256cb | 2197 | } |
d0628b06 | 2198 | |
66322887 | 2199 | /* Set the current buffer to BUFFER provided if it is alive. */ |
d0628b06 RS |
2200 | |
2201 | Lisp_Object | |
d3da34e0 | 2202 | set_buffer_if_live (Lisp_Object buffer) |
d0628b06 | 2203 | { |
e578f381 | 2204 | if (BUFFER_LIVE_P (XBUFFER (buffer))) |
a3d794a1 | 2205 | set_buffer_internal (XBUFFER (buffer)); |
d0628b06 RS |
2206 | return Qnil; |
2207 | } | |
1ab256cb | 2208 | \f |
a7ca3326 | 2209 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, |
1ab256cb | 2210 | Sbarf_if_buffer_read_only, 0, 0, 0, |
7ee72033 | 2211 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
5842a27b | 2212 | (void) |
1ab256cb | 2213 | { |
4b4deea2 | 2214 | if (!NILP (BVAR (current_buffer, read_only)) |
a96b68f1 | 2215 | && NILP (Vinhibit_read_only)) |
4c4dc0b0 | 2216 | xsignal1 (Qbuffer_read_only, Fcurrent_buffer ()); |
1ab256cb RM |
2217 | return Qnil; |
2218 | } | |
1ab256cb | 2219 | \f |
a7ca3326 | 2220 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 2221 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 2222 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 | 2223 | so the buffer is truly empty after this. */) |
5842a27b | 2224 | (void) |
1ab256cb RM |
2225 | { |
2226 | Fwiden (); | |
c0d9a0c3 GM |
2227 | |
2228 | del_range (BEG, Z); | |
c280bc6a | 2229 | |
1ab256cb RM |
2230 | current_buffer->last_window_start = 1; |
2231 | /* Prevent warnings, or suspension of auto saving, that would happen | |
2232 | if future size is less than past size. Use of erase-buffer | |
2233 | implies that the future text is not really related to the past text. */ | |
4b4deea2 | 2234 | XSETFASTINT (BVAR (current_buffer, save_length), 0); |
1ab256cb RM |
2235 | return Qnil; |
2236 | } | |
2237 | ||
01136e9b | 2238 | void |
d3da34e0 | 2239 | validate_region (register Lisp_Object *b, register Lisp_Object *e) |
1ab256cb | 2240 | { |
b7826503 PJ |
2241 | CHECK_NUMBER_COERCE_MARKER (*b); |
2242 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
2243 | |
2244 | if (XINT (*b) > XINT (*e)) | |
2245 | { | |
03192067 KH |
2246 | Lisp_Object tem; |
2247 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
2248 | } |
2249 | ||
d311d28c | 2250 | if (! (BEGV <= XINT (*b) && XINT (*e) <= ZV)) |
1ab256cb RM |
2251 | args_out_of_range (*b, *e); |
2252 | } | |
2253 | \f | |
b05525fa RS |
2254 | /* Advance BYTE_POS up to a character boundary |
2255 | and return the adjusted position. */ | |
2256 | ||
d311d28c PE |
2257 | static ptrdiff_t |
2258 | advance_to_char_boundary (ptrdiff_t byte_pos) | |
b05525fa | 2259 | { |
f8449323 | 2260 | int c; |
b05525fa | 2261 | |
f8449323 RS |
2262 | if (byte_pos == BEG) |
2263 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 2264 | return BEG; |
f8449323 RS |
2265 | |
2266 | c = FETCH_BYTE (byte_pos); | |
2267 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 2268 | { |
1be6387d | 2269 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 2270 | multibyte sequence. */ |
d311d28c | 2271 | ptrdiff_t orig_byte_pos = byte_pos; |
a9bcded1 KH |
2272 | |
2273 | do | |
2274 | { | |
2275 | byte_pos--; | |
2276 | c = FETCH_BYTE (byte_pos); | |
2277 | } | |
2278 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2279 | INC_POS (byte_pos); |
a9bcded1 KH |
2280 | if (byte_pos < orig_byte_pos) |
2281 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2282 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2283 | surely advance to the correct character boundary. If C is | |
2284 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2285 | } |
2286 | ||
20773569 | 2287 | return byte_pos; |
b05525fa RS |
2288 | } |
2289 | ||
13cda5f9 SM |
2290 | DEFUN ("buffer-swap-text", Fbuffer_swap_text, Sbuffer_swap_text, |
2291 | 1, 1, 0, | |
2292 | doc: /* Swap the text between current buffer and BUFFER. */) | |
5842a27b | 2293 | (Lisp_Object buffer) |
13cda5f9 SM |
2294 | { |
2295 | struct buffer *other_buffer; | |
2296 | CHECK_BUFFER (buffer); | |
2297 | other_buffer = XBUFFER (buffer); | |
2298 | ||
e578f381 | 2299 | if (!BUFFER_LIVE_P (other_buffer)) |
409f2919 | 2300 | error ("Cannot swap a dead buffer's text"); |
dc9cc574 | 2301 | |
13cda5f9 SM |
2302 | /* Actually, it probably works just fine. |
2303 | * if (other_buffer == current_buffer) | |
2304 | * error ("Cannot swap a buffer's text with itself"); */ | |
2305 | ||
2306 | /* Actually, this may be workable as well, tho probably only if they're | |
2307 | *both* indirect. */ | |
2308 | if (other_buffer->base_buffer | |
2309 | || current_buffer->base_buffer) | |
2310 | error ("Cannot swap indirect buffers's text"); | |
2311 | ||
2312 | { /* This is probably harder to make work. */ | |
2313 | struct buffer *other; | |
52b852c7 | 2314 | FOR_EACH_BUFFER (other) |
13cda5f9 SM |
2315 | if (other->base_buffer == other_buffer |
2316 | || other->base_buffer == current_buffer) | |
2317 | error ("One of the buffers to swap has indirect buffers"); | |
2318 | } | |
2319 | ||
2320 | #define swapfield(field, type) \ | |
2321 | do { \ | |
2322 | type tmp##field = other_buffer->field; \ | |
2323 | other_buffer->field = current_buffer->field; \ | |
2324 | current_buffer->field = tmp##field; \ | |
2325 | } while (0) | |
5d8ea120 TT |
2326 | #define swapfield_(field, type) \ |
2327 | do { \ | |
4b4deea2 | 2328 | type tmp##field = BVAR (other_buffer, field); \ |
39eb03f1 PE |
2329 | bset_##field (other_buffer, BVAR (current_buffer, field)); \ |
2330 | bset_##field (current_buffer, tmp##field); \ | |
5d8ea120 | 2331 | } while (0) |
13cda5f9 SM |
2332 | |
2333 | swapfield (own_text, struct buffer_text); | |
2334 | eassert (current_buffer->text == ¤t_buffer->own_text); | |
2335 | eassert (other_buffer->text == &other_buffer->own_text); | |
baae5c2d | 2336 | #ifdef REL_ALLOC |
261cb4bb PE |
2337 | r_alloc_reset_variable ((void **) ¤t_buffer->own_text.beg, |
2338 | (void **) &other_buffer->own_text.beg); | |
2339 | r_alloc_reset_variable ((void **) &other_buffer->own_text.beg, | |
2340 | (void **) ¤t_buffer->own_text.beg); | |
baae5c2d JR |
2341 | #endif /* REL_ALLOC */ |
2342 | ||
d311d28c PE |
2343 | swapfield (pt, ptrdiff_t); |
2344 | swapfield (pt_byte, ptrdiff_t); | |
2345 | swapfield (begv, ptrdiff_t); | |
2346 | swapfield (begv_byte, ptrdiff_t); | |
2347 | swapfield (zv, ptrdiff_t); | |
2348 | swapfield (zv_byte, ptrdiff_t); | |
13cda5f9 SM |
2349 | eassert (!current_buffer->base_buffer); |
2350 | eassert (!other_buffer->base_buffer); | |
372f8ffc | 2351 | swapfield (indirections, ptrdiff_t); |
13cda5f9 SM |
2352 | current_buffer->clip_changed = 1; other_buffer->clip_changed = 1; |
2353 | swapfield (newline_cache, struct region_cache *); | |
2354 | swapfield (width_run_cache, struct region_cache *); | |
2355 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2356 | other_buffer->prevent_redisplay_optimizations_p = 1; | |
2357 | swapfield (overlays_before, struct Lisp_Overlay *); | |
2358 | swapfield (overlays_after, struct Lisp_Overlay *); | |
d311d28c | 2359 | swapfield (overlay_center, ptrdiff_t); |
5d8ea120 TT |
2360 | swapfield_ (undo_list, Lisp_Object); |
2361 | swapfield_ (mark, Lisp_Object); | |
2362 | swapfield_ (enable_multibyte_characters, Lisp_Object); | |
2363 | swapfield_ (bidi_display_reordering, Lisp_Object); | |
2364 | swapfield_ (bidi_paragraph_direction, Lisp_Object); | |
13cda5f9 SM |
2365 | /* FIXME: Not sure what we should do with these *_marker fields. |
2366 | Hopefully they're just nil anyway. */ | |
5d8ea120 TT |
2367 | swapfield_ (pt_marker, Lisp_Object); |
2368 | swapfield_ (begv_marker, Lisp_Object); | |
2369 | swapfield_ (zv_marker, Lisp_Object); | |
39eb03f1 PE |
2370 | bset_point_before_scroll (current_buffer, Qnil); |
2371 | bset_point_before_scroll (other_buffer, Qnil); | |
13cda5f9 SM |
2372 | |
2373 | current_buffer->text->modiff++; other_buffer->text->modiff++; | |
2374 | current_buffer->text->chars_modiff++; other_buffer->text->chars_modiff++; | |
2375 | current_buffer->text->overlay_modiff++; other_buffer->text->overlay_modiff++; | |
2376 | current_buffer->text->beg_unchanged = current_buffer->text->gpt; | |
2377 | current_buffer->text->end_unchanged = current_buffer->text->gpt; | |
b8ff72fa SM |
2378 | other_buffer->text->beg_unchanged = other_buffer->text->gpt; |
2379 | other_buffer->text->end_unchanged = other_buffer->text->gpt; | |
13cda5f9 SM |
2380 | { |
2381 | struct Lisp_Marker *m; | |
2382 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) | |
2383 | if (m->buffer == other_buffer) | |
2384 | m->buffer = current_buffer; | |
b8ff72fa SM |
2385 | else |
2386 | /* Since there's no indirect buffer in sight, markers on | |
2387 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2388 | eassert (!m->buffer); | |
13cda5f9 SM |
2389 | for (m = BUF_MARKERS (other_buffer); m; m = m->next) |
2390 | if (m->buffer == current_buffer) | |
2391 | m->buffer = other_buffer; | |
b8ff72fa SM |
2392 | else |
2393 | /* Since there's no indirect buffer in sight, markers on | |
2394 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2395 | eassert (!m->buffer); | |
13cda5f9 | 2396 | } |
c7f53895 DA |
2397 | { /* Some of the C code expects that both window markers of a |
2398 | live window points to that window's buffer. So since we | |
2399 | just swapped the markers between the two buffers, we need | |
126f1fc1 SM |
2400 | to undo the effect of this swap for window markers. */ |
2401 | Lisp_Object w = Fselected_window (), ws = Qnil; | |
2402 | Lisp_Object buf1, buf2; | |
2403 | XSETBUFFER (buf1, current_buffer); XSETBUFFER (buf2, other_buffer); | |
2404 | ||
2405 | while (NILP (Fmemq (w, ws))) | |
2406 | { | |
2407 | ws = Fcons (w, ws); | |
d3d50620 DA |
2408 | if (MARKERP (XWINDOW (w)->pointm) |
2409 | && (EQ (XWINDOW (w)->buffer, buf1) | |
2410 | || EQ (XWINDOW (w)->buffer, buf2))) | |
2411 | Fset_marker (XWINDOW (w)->pointm, | |
3a45383a | 2412 | make_number |
d3d50620 DA |
2413 | (BUF_BEGV (XBUFFER (XWINDOW (w)->buffer))), |
2414 | XWINDOW (w)->buffer); | |
c7f53895 DA |
2415 | if (MARKERP (XWINDOW (w)->start) |
2416 | && (EQ (XWINDOW (w)->buffer, buf1) | |
2417 | || EQ (XWINDOW (w)->buffer, buf2))) | |
2418 | Fset_marker (XWINDOW (w)->start, | |
2419 | make_number | |
2420 | (XBUFFER (XWINDOW (w)->buffer)->last_window_start), | |
2421 | XWINDOW (w)->buffer); | |
126f1fc1 SM |
2422 | w = Fnext_window (w, Qt, Qt); |
2423 | } | |
2424 | } | |
2425 | ||
13cda5f9 SM |
2426 | if (current_buffer->text->intervals) |
2427 | (eassert (EQ (current_buffer->text->intervals->up.obj, buffer)), | |
2428 | XSETBUFFER (current_buffer->text->intervals->up.obj, current_buffer)); | |
2429 | if (other_buffer->text->intervals) | |
2430 | (eassert (EQ (other_buffer->text->intervals->up.obj, Fcurrent_buffer ())), | |
2431 | XSETBUFFER (other_buffer->text->intervals->up.obj, other_buffer)); | |
2432 | ||
2433 | return Qnil; | |
2434 | } | |
2435 | ||
a7ca3326 | 2436 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
3ac81adb | 2437 | 1, 1, 0, |
7ee72033 | 2438 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2439 | If FLAG is t, this makes the buffer a multibyte buffer. |
2440 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
8f924df7 KH |
2441 | In these cases, the buffer contents remain unchanged as a sequence of |
2442 | bytes but the contents viewed as characters do change. | |
2443 | If FLAG is `to', this makes the buffer a multibyte buffer by changing | |
6b61353c KH |
2444 | all eight-bit bytes to eight-bit characters. |
2445 | If the multibyte flag was really changed, undo information of the | |
2446 | current buffer is cleared. */) | |
5842a27b | 2447 | (Lisp_Object flag) |
3ac81adb | 2448 | { |
65745fad | 2449 | struct Lisp_Marker *tail, *markers; |
abc9d959 | 2450 | struct buffer *other; |
d311d28c | 2451 | ptrdiff_t begv, zv; |
37ef52bb PE |
2452 | bool narrowed = (BEG != BEGV || Z != ZV); |
2453 | bool modified_p = !NILP (Fbuffer_modified_p (Qnil)); | |
4b4deea2 | 2454 | Lisp_Object old_undo = BVAR (current_buffer, undo_list); |
38babc07 | 2455 | struct gcpro gcpro1; |
3ac81adb | 2456 | |
6e553d5e RS |
2457 | if (current_buffer->base_buffer) |
2458 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2459 | ||
70e77119 | 2460 | /* Do nothing if nothing actually changes. */ |
4b4deea2 | 2461 | if (NILP (flag) == NILP (BVAR (current_buffer, enable_multibyte_characters))) |
70e77119 AS |
2462 | return flag; |
2463 | ||
38babc07 KS |
2464 | GCPRO1 (old_undo); |
2465 | ||
2466 | /* Don't record these buffer changes. We will put a special undo entry | |
2467 | instead. */ | |
39eb03f1 | 2468 | bset_undo_list (current_buffer, Qt); |
b05525fa | 2469 | |
3ac81adb RS |
2470 | /* If the cached position is for this buffer, clear it out. */ |
2471 | clear_charpos_cache (current_buffer); | |
2472 | ||
458c8af4 KH |
2473 | if (NILP (flag)) |
2474 | begv = BEGV_BYTE, zv = ZV_BYTE; | |
2475 | else | |
2476 | begv = BEGV, zv = ZV; | |
2477 | ||
a9bcded1 | 2478 | if (narrowed) |
090cf9db | 2479 | error ("Changing multibyteness in a narrowed buffer"); |
a9bcded1 | 2480 | |
3ac81adb RS |
2481 | if (NILP (flag)) |
2482 | { | |
d311d28c | 2483 | ptrdiff_t pos, stop; |
a9bcded1 KH |
2484 | unsigned char *p; |
2485 | ||
3ac81adb RS |
2486 | /* Do this first, so it can use CHAR_TO_BYTE |
2487 | to calculate the old correspondences. */ | |
2488 | set_intervals_multibyte (0); | |
2489 | ||
39eb03f1 | 2490 | bset_enable_multibyte_characters (current_buffer, Qnil); |
3ac81adb RS |
2491 | |
2492 | Z = Z_BYTE; | |
2493 | BEGV = BEGV_BYTE; | |
2494 | ZV = ZV_BYTE; | |
2495 | GPT = GPT_BYTE; | |
2496 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2497 | ||
60ebfdf3 | 2498 | |
65745fad SM |
2499 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
2500 | tail->charpos = tail->bytepos; | |
a9bcded1 KH |
2501 | |
2502 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2503 | pos = BEG; | |
2504 | stop = GPT; | |
2505 | p = BEG_ADDR; | |
2506 | while (1) | |
2507 | { | |
2508 | int c, bytes; | |
2509 | ||
2510 | if (pos == stop) | |
2511 | { | |
2512 | if (pos == Z) | |
2513 | break; | |
2514 | p = GAP_END_ADDR; | |
2515 | stop = Z; | |
2516 | } | |
8f348ed5 KH |
2517 | if (ASCII_BYTE_P (*p)) |
2518 | p++, pos++; | |
2519 | else if (CHAR_BYTE8_HEAD_P (*p)) | |
a9bcded1 | 2520 | { |
62a6e103 | 2521 | c = STRING_CHAR_AND_LENGTH (p, bytes); |
a9bcded1 | 2522 | /* Delete all bytes for this 8-bit character but the |
3b59c351 | 2523 | last one, and change the last one to the character |
a9bcded1 KH |
2524 | code. */ |
2525 | bytes--; | |
2526 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2527 | p = GAP_END_ADDR; | |
2528 | *p++ = c; | |
2529 | pos++; | |
2530 | if (begv > pos) | |
2531 | begv -= bytes; | |
2532 | if (zv > pos) | |
2533 | zv -= bytes; | |
2534 | stop = Z; | |
2535 | } | |
8f924df7 | 2536 | else |
8f348ed5 KH |
2537 | { |
2538 | bytes = BYTES_BY_CHAR_HEAD (*p); | |
2539 | p += bytes, pos += bytes; | |
2540 | } | |
a9bcded1 KH |
2541 | } |
2542 | if (narrowed) | |
2543 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2544 | } |
2545 | else | |
2546 | { | |
d311d28c PE |
2547 | ptrdiff_t pt = PT; |
2548 | ptrdiff_t pos, stop; | |
8f348ed5 | 2549 | unsigned char *p, *pend; |
a9bcded1 | 2550 | |
673c57d2 | 2551 | /* Be sure not to have a multibyte sequence striding over the GAP. |
8f348ed5 KH |
2552 | Ex: We change this: "...abc\302 _GAP_ \241def..." |
2553 | to: "...abc _GAP_ \302\241def..." */ | |
673c57d2 | 2554 | |
8f924df7 | 2555 | if (EQ (flag, Qt) |
a3a303df | 2556 | && GPT_BYTE > 1 && GPT_BYTE < Z_BYTE |
673c57d2 KH |
2557 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) |
2558 | { | |
8f54f30a | 2559 | unsigned char *q = GPT_ADDR - 1; |
673c57d2 | 2560 | |
8f54f30a PE |
2561 | while (! CHAR_HEAD_P (*q) && q > BEG_ADDR) q--; |
2562 | if (LEADING_CODE_P (*q)) | |
673c57d2 | 2563 | { |
d311d28c | 2564 | ptrdiff_t new_gpt = GPT_BYTE - (GPT_ADDR - q); |
673c57d2 KH |
2565 | |
2566 | move_gap_both (new_gpt, new_gpt); | |
2567 | } | |
2568 | } | |
2569 | ||
a9bcded1 KH |
2570 | /* Make the buffer contents valid as multibyte by converting |
2571 | 8-bit characters to multibyte form. */ | |
2572 | pos = BEG; | |
2573 | stop = GPT; | |
2574 | p = BEG_ADDR; | |
8f348ed5 | 2575 | pend = GPT_ADDR; |
a9bcded1 KH |
2576 | while (1) |
2577 | { | |
2578 | int bytes; | |
2579 | ||
2580 | if (pos == stop) | |
2581 | { | |
2582 | if (pos == Z) | |
2583 | break; | |
2584 | p = GAP_END_ADDR; | |
8f348ed5 | 2585 | pend = Z_ADDR; |
a9bcded1 KH |
2586 | stop = Z; |
2587 | } | |
177c0ea7 | 2588 | |
a3a303df KH |
2589 | if (ASCII_BYTE_P (*p)) |
2590 | p++, pos++; | |
dcfb9bc4 KH |
2591 | else if (EQ (flag, Qt) |
2592 | && ! CHAR_BYTE8_HEAD_P (*p) | |
2593 | && (bytes = MULTIBYTE_LENGTH (p, pend)) > 0) | |
a9bcded1 KH |
2594 | p += bytes, pos += bytes; |
2595 | else | |
2596 | { | |
2597 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
a3a303df | 2598 | int c; |
a9bcded1 | 2599 | |
8f924df7 | 2600 | c = BYTE8_TO_CHAR (*p); |
8c2fc311 | 2601 | bytes = CHAR_STRING (c, tmp); |
a9bcded1 KH |
2602 | *p = tmp[0]; |
2603 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2604 | bytes--; | |
b68864e5 | 2605 | insert_1_both ((char *) tmp + 1, bytes, bytes, 1, 0, 0); |
a9bcded1 KH |
2606 | /* Now the gap is after the just inserted data. */ |
2607 | pos = GPT; | |
2608 | p = GAP_END_ADDR; | |
2609 | if (pos <= begv) | |
2610 | begv += bytes; | |
2611 | if (pos <= zv) | |
2612 | zv += bytes; | |
2613 | if (pos <= pt) | |
2614 | pt += bytes; | |
31285a8f | 2615 | pend = Z_ADDR; |
a9bcded1 KH |
2616 | stop = Z; |
2617 | } | |
2618 | } | |
2619 | ||
2620 | if (pt != PT) | |
2621 | TEMP_SET_PT (pt); | |
2622 | ||
2623 | if (narrowed) | |
2624 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2625 | ||
3ac81adb RS |
2626 | /* Do this first, so that chars_in_text asks the right question. |
2627 | set_intervals_multibyte needs it too. */ | |
39eb03f1 | 2628 | bset_enable_multibyte_characters (current_buffer, Qt); |
3ac81adb | 2629 | |
b05525fa | 2630 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2631 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2632 | |
673c57d2 | 2633 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2634 | |
2635 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2636 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2637 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2638 | else |
2639 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2640 | |
2641 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2642 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2643 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2644 | else |
2645 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2646 | |
2647 | { | |
d311d28c PE |
2648 | ptrdiff_t byte = advance_to_char_boundary (PT_BYTE); |
2649 | ptrdiff_t position; | |
b05525fa | 2650 | |
8f54f30a PE |
2651 | if (byte > GPT_BYTE) |
2652 | position = chars_in_text (GAP_END_ADDR, byte - GPT_BYTE) + GPT; | |
b05525fa | 2653 | else |
8f54f30a PE |
2654 | position = chars_in_text (BEG_ADDR, byte - BEG_BYTE) + BEG; |
2655 | TEMP_SET_PT_BOTH (position, byte); | |
b05525fa | 2656 | } |
3ac81adb RS |
2657 | |
2658 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2659 | |
2660 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2661 | getting confused by the markers that have not yet been updated. | |
2662 | It is also a signal that it should never create a marker. */ | |
65745fad | 2663 | BUF_MARKERS (current_buffer) = NULL; |
3ac81adb | 2664 | |
65745fad | 2665 | for (; tail; tail = tail->next) |
3ac81adb | 2666 | { |
65745fad SM |
2667 | tail->bytepos = advance_to_char_boundary (tail->bytepos); |
2668 | tail->charpos = BYTE_TO_CHAR (tail->bytepos); | |
3ac81adb | 2669 | } |
b69f9797 RS |
2670 | |
2671 | /* Make sure no markers were put on the chain | |
2672 | while the chain value was incorrect. */ | |
65745fad | 2673 | if (BUF_MARKERS (current_buffer)) |
1088b922 | 2674 | emacs_abort (); |
b69f9797 | 2675 | |
3ac81adb RS |
2676 | BUF_MARKERS (current_buffer) = markers; |
2677 | ||
2678 | /* Do this last, so it can calculate the new correspondences | |
2679 | between chars and bytes. */ | |
2680 | set_intervals_multibyte (1); | |
2681 | } | |
2682 | ||
38babc07 KS |
2683 | if (!EQ (old_undo, Qt)) |
2684 | { | |
2685 | /* Represent all the above changes by a special undo entry. */ | |
39eb03f1 PE |
2686 | bset_undo_list (current_buffer, |
2687 | Fcons (list3 (Qapply, | |
2688 | intern ("set-buffer-multibyte"), | |
2689 | NILP (flag) ? Qt : Qnil), | |
2690 | old_undo)); | |
38babc07 KS |
2691 | } |
2692 | ||
2693 | UNGCPRO; | |
a9bcded1 | 2694 | |
724b203f | 2695 | current_buffer->prevent_redisplay_optimizations_p = 1; |
c6afe371 DA |
2696 | |
2697 | /* If buffer is shown in a window, let redisplay consider other windows. */ | |
2698 | if (buffer_window_count (current_buffer)) | |
2699 | ++windows_or_buffers_changed; | |
724b203f | 2700 | |
abc9d959 RS |
2701 | /* Copy this buffer's new multibyte status |
2702 | into all of its indirect buffers. */ | |
52b852c7 | 2703 | FOR_EACH_BUFFER (other) |
e578f381 | 2704 | if (other->base_buffer == current_buffer && BUFFER_LIVE_P (other)) |
724b203f | 2705 | { |
4b4deea2 TT |
2706 | BVAR (other, enable_multibyte_characters) |
2707 | = BVAR (current_buffer, enable_multibyte_characters); | |
724b203f GM |
2708 | other->prevent_redisplay_optimizations_p = 1; |
2709 | } | |
abc9d959 | 2710 | |
ed00559d KH |
2711 | /* Restore the modifiedness of the buffer. */ |
2712 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2713 | Fset_buffer_modified_p (Qnil); | |
2714 | ||
172f9454 KH |
2715 | /* Update coding systems of this buffer's process (if any). */ |
2716 | { | |
2717 | Lisp_Object process; | |
2718 | ||
2719 | process = Fget_buffer_process (Fcurrent_buffer ()); | |
2720 | if (PROCESSP (process)) | |
2721 | setup_process_coding_systems (process); | |
2722 | } | |
2723 | ||
3ac81adb RS |
2724 | return flag; |
2725 | } | |
2726 | \f | |
a7ca3326 | 2727 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, |
16a97296 | 2728 | Skill_all_local_variables, 0, 0, 0, |
7ee72033 | 2729 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2730 | Most local variable bindings are eliminated so that the default values |
2731 | become effective once more. Also, the syntax table is set from | |
2732 | `standard-syntax-table', the local keymap is set to nil, | |
2733 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2734 | This function also forces redisplay of the mode line. | |
2735 | ||
2736 | Every function to select a new major mode starts by | |
2737 | calling this function. | |
2738 | ||
2739 | As a special exception, local variables whose names have | |
2740 | a non-nil `permanent-local' property are not eliminated by this function. | |
2741 | ||
2742 | The first thing this function does is run | |
7ee72033 | 2743 | the normal hook `change-major-mode-hook'. */) |
5842a27b | 2744 | (void) |
1ab256cb | 2745 | { |
dee091a3 | 2746 | Frun_hooks (1, &Qchange_major_mode_hook); |
1ab256cb | 2747 | |
3709505e | 2748 | /* Make sure none of the bindings in local_var_alist |
2f3f993b | 2749 | remain swapped in, in their symbols. */ |
1ab256cb | 2750 | |
2f3f993b | 2751 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2752 | |
2753 | /* Actually eliminate all local bindings of this buffer. */ | |
2754 | ||
13de9290 | 2755 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2756 | |
1ab256cb RM |
2757 | /* Force mode-line redisplay. Useful here because all major mode |
2758 | commands call this function. */ | |
2759 | update_mode_lines++; | |
2760 | ||
2761 | return Qnil; | |
2762 | } | |
2f3f993b RS |
2763 | |
2764 | /* Make sure no local variables remain set up with buffer B | |
2765 | for their current values. */ | |
2766 | ||
2767 | static void | |
d3da34e0 | 2768 | swap_out_buffer_local_variables (struct buffer *b) |
2f3f993b | 2769 | { |
ce5b453a | 2770 | Lisp_Object oalist, alist, buffer; |
2f3f993b RS |
2771 | |
2772 | XSETBUFFER (buffer, b); | |
4b4deea2 | 2773 | oalist = BVAR (b, local_var_alist); |
2f3f993b | 2774 | |
67ee9f6e | 2775 | for (alist = oalist; CONSP (alist); alist = XCDR (alist)) |
2f3f993b | 2776 | { |
ce5b453a SM |
2777 | Lisp_Object sym = XCAR (XCAR (alist)); |
2778 | eassert (XSYMBOL (sym)->redirect == SYMBOL_LOCALIZED); | |
2779 | /* Need not do anything if some other buffer's binding is | |
e4769531 | 2780 | now cached. */ |
ce5b453a | 2781 | if (EQ (SYMBOL_BLV (XSYMBOL (sym))->where, buffer)) |
2f3f993b | 2782 | { |
e7c10f83 SM |
2783 | /* Symbol is set up for this buffer's old local value: |
2784 | swap it out! */ | |
ce5b453a | 2785 | swap_in_global_binding (XSYMBOL (sym)); |
2f3f993b RS |
2786 | } |
2787 | } | |
2788 | } | |
1ab256cb | 2789 | \f |
2eec3b4e | 2790 | /* Find all the overlays in the current buffer that contain position POS. |
177c0ea7 | 2791 | Return the number found, and store them in a vector in *VEC_PTR. |
2eec3b4e | 2792 | Store in *LEN_PTR the size allocated for the vector. |
52f8ec73 | 2793 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
624d2678 | 2794 | or ZV if there are no more overlays between POS and ZV. |
bbbe9545 | 2795 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 | 2796 | or where an overlay starts which ends at or after POS; |
624d2678 | 2797 | or BEGV if there are no such overlays from BEGV to POS. |
239c932b | 2798 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2799 | |
2800 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2801 | when this function is called. |
2802 | ||
37ef52bb PE |
2803 | If EXTEND, make the vector bigger if necessary. |
2804 | If not, never extend the vector, | |
2805 | and store only as many overlays as will fit. | |
2806 | But still return the total number of overlays. | |
ac869cf7 | 2807 | |
37ef52bb | 2808 | If CHANGE_REQ, any position written into *PREV_PTR or |
ac869cf7 MB |
2809 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the |
2810 | default (BEGV or ZV). */ | |
2eec3b4e | 2811 | |
b081724f | 2812 | ptrdiff_t |
37ef52bb | 2813 | overlays_at (EMACS_INT pos, bool extend, Lisp_Object **vec_ptr, |
b081724f | 2814 | ptrdiff_t *len_ptr, |
37ef52bb | 2815 | ptrdiff_t *next_ptr, ptrdiff_t *prev_ptr, bool change_req) |
1ab256cb | 2816 | { |
2410d73a SM |
2817 | Lisp_Object overlay, start, end; |
2818 | struct Lisp_Overlay *tail; | |
b081724f PE |
2819 | ptrdiff_t idx = 0; |
2820 | ptrdiff_t len = *len_ptr; | |
2eec3b4e | 2821 | Lisp_Object *vec = *vec_ptr; |
d311d28c PE |
2822 | ptrdiff_t next = ZV; |
2823 | ptrdiff_t prev = BEGV; | |
37ef52bb | 2824 | bool inhibit_storing = 0; |
61d54cd5 | 2825 | |
fd318b54 | 2826 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
2eec3b4e | 2827 | { |
d311d28c | 2828 | ptrdiff_t startpos, endpos; |
52f8ec73 | 2829 | |
2410d73a | 2830 | XSETMISC (overlay, tail); |
1ab256cb | 2831 | |
2eec3b4e RS |
2832 | start = OVERLAY_START (overlay); |
2833 | end = OVERLAY_END (overlay); | |
239c932b RS |
2834 | endpos = OVERLAY_POSITION (end); |
2835 | if (endpos < pos) | |
2836 | { | |
2837 | if (prev < endpos) | |
2838 | prev = endpos; | |
2839 | break; | |
2840 | } | |
413e06a4 RS |
2841 | startpos = OVERLAY_POSITION (start); |
2842 | /* This one ends at or after POS | |
daa1c109 | 2843 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2844 | if (prev < startpos && startpos < pos) |
2845 | prev = startpos; | |
239c932b RS |
2846 | if (endpos == pos) |
2847 | continue; | |
2eec3b4e RS |
2848 | if (startpos <= pos) |
2849 | { | |
2850 | if (idx == len) | |
2851 | { | |
61d54cd5 RS |
2852 | /* The supplied vector is full. |
2853 | Either make it bigger, or don't store any more in it. */ | |
2854 | if (extend) | |
2855 | { | |
0065d054 PE |
2856 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2857 | sizeof *vec); | |
61d54cd5 | 2858 | *vec_ptr = vec; |
0065d054 | 2859 | len = *len_ptr; |
61d54cd5 RS |
2860 | } |
2861 | else | |
2862 | inhibit_storing = 1; | |
2eec3b4e | 2863 | } |
61d54cd5 RS |
2864 | |
2865 | if (!inhibit_storing) | |
2866 | vec[idx] = overlay; | |
2867 | /* Keep counting overlays even if we can't return them all. */ | |
2868 | idx++; | |
2eec3b4e RS |
2869 | } |
2870 | else if (startpos < next) | |
2871 | next = startpos; | |
2872 | } | |
2873 | ||
fd318b54 | 2874 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
1ab256cb | 2875 | { |
d311d28c | 2876 | ptrdiff_t startpos, endpos; |
52f8ec73 | 2877 | |
2410d73a | 2878 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2879 | |
2880 | start = OVERLAY_START (overlay); | |
2881 | end = OVERLAY_END (overlay); | |
2882 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2883 | if (pos < startpos) |
2eec3b4e RS |
2884 | { |
2885 | if (startpos < next) | |
2886 | next = startpos; | |
2887 | break; | |
2888 | } | |
239c932b RS |
2889 | endpos = OVERLAY_POSITION (end); |
2890 | if (pos < endpos) | |
2eec3b4e RS |
2891 | { |
2892 | if (idx == len) | |
2893 | { | |
61d54cd5 RS |
2894 | if (extend) |
2895 | { | |
0065d054 PE |
2896 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2897 | sizeof *vec); | |
61d54cd5 | 2898 | *vec_ptr = vec; |
0065d054 | 2899 | len = *len_ptr; |
61d54cd5 RS |
2900 | } |
2901 | else | |
2902 | inhibit_storing = 1; | |
2eec3b4e | 2903 | } |
61d54cd5 RS |
2904 | |
2905 | if (!inhibit_storing) | |
2906 | vec[idx] = overlay; | |
2907 | idx++; | |
413e06a4 RS |
2908 | |
2909 | if (startpos < pos && startpos > prev) | |
2910 | prev = startpos; | |
2eec3b4e | 2911 | } |
239c932b RS |
2912 | else if (endpos < pos && endpos > prev) |
2913 | prev = endpos; | |
1d5f4c1d MB |
2914 | else if (endpos == pos && startpos > prev |
2915 | && (!change_req || startpos < pos)) | |
413e06a4 | 2916 | prev = startpos; |
1ab256cb RM |
2917 | } |
2918 | ||
239c932b RS |
2919 | if (next_ptr) |
2920 | *next_ptr = next; | |
2921 | if (prev_ptr) | |
2922 | *prev_ptr = prev; | |
2eec3b4e RS |
2923 | return idx; |
2924 | } | |
74514898 | 2925 | \f |
7723e095 MR |
2926 | /* Find all the overlays in the current buffer that overlap the range |
2927 | BEG-END, or are empty at BEG, or are empty at END provided END | |
2928 | denotes the position at the end of the current buffer. | |
2a3eeee7 | 2929 | |
177c0ea7 | 2930 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2931 | Store in *LEN_PTR the size allocated for the vector. |
2932 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2933 | or ZV if there are no more overlays. | |
2934 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2935 | or BEGV if there are no previous overlays. | |
2936 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2937 | ||
2938 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2939 | when this function is called. | |
2940 | ||
37ef52bb PE |
2941 | If EXTEND, make the vector bigger if necessary. |
2942 | If not, never extend the vector, | |
2943 | and store only as many overlays as will fit. | |
2944 | But still return the total number of overlays. */ | |
74514898 | 2945 | |
21514da7 | 2946 | static ptrdiff_t |
37ef52bb | 2947 | overlays_in (EMACS_INT beg, EMACS_INT end, bool extend, |
21514da7 | 2948 | Lisp_Object **vec_ptr, ptrdiff_t *len_ptr, |
d311d28c | 2949 | ptrdiff_t *next_ptr, ptrdiff_t *prev_ptr) |
74514898 | 2950 | { |
2410d73a SM |
2951 | Lisp_Object overlay, ostart, oend; |
2952 | struct Lisp_Overlay *tail; | |
21514da7 PE |
2953 | ptrdiff_t idx = 0; |
2954 | ptrdiff_t len = *len_ptr; | |
74514898 | 2955 | Lisp_Object *vec = *vec_ptr; |
d311d28c PE |
2956 | ptrdiff_t next = ZV; |
2957 | ptrdiff_t prev = BEGV; | |
37ef52bb PE |
2958 | bool inhibit_storing = 0; |
2959 | bool end_is_Z = end == Z; | |
74514898 | 2960 | |
fd318b54 | 2961 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
74514898 | 2962 | { |
d311d28c | 2963 | ptrdiff_t startpos, endpos; |
74514898 | 2964 | |
2410d73a | 2965 | XSETMISC (overlay, tail); |
74514898 RS |
2966 | |
2967 | ostart = OVERLAY_START (overlay); | |
2968 | oend = OVERLAY_END (overlay); | |
2969 | endpos = OVERLAY_POSITION (oend); | |
2970 | if (endpos < beg) | |
2971 | { | |
2972 | if (prev < endpos) | |
2973 | prev = endpos; | |
2974 | break; | |
2975 | } | |
2976 | startpos = OVERLAY_POSITION (ostart); | |
7723e095 MR |
2977 | /* Count an interval if it overlaps the range, is empty at the |
2978 | start of the range, or is empty at END provided END denotes the | |
2979 | end of the buffer. */ | |
74514898 | 2980 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2981 | || (startpos == endpos |
2982 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2983 | { |
2984 | if (idx == len) | |
2985 | { | |
2986 | /* The supplied vector is full. | |
2987 | Either make it bigger, or don't store any more in it. */ | |
2988 | if (extend) | |
2989 | { | |
0065d054 PE |
2990 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2991 | sizeof *vec); | |
74514898 | 2992 | *vec_ptr = vec; |
0065d054 | 2993 | len = *len_ptr; |
74514898 RS |
2994 | } |
2995 | else | |
2996 | inhibit_storing = 1; | |
2997 | } | |
2998 | ||
2999 | if (!inhibit_storing) | |
3000 | vec[idx] = overlay; | |
3001 | /* Keep counting overlays even if we can't return them all. */ | |
3002 | idx++; | |
3003 | } | |
3004 | else if (startpos < next) | |
3005 | next = startpos; | |
3006 | } | |
3007 | ||
fd318b54 | 3008 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
74514898 | 3009 | { |
d311d28c | 3010 | ptrdiff_t startpos, endpos; |
74514898 | 3011 | |
2410d73a | 3012 | XSETMISC (overlay, tail); |
74514898 RS |
3013 | |
3014 | ostart = OVERLAY_START (overlay); | |
3015 | oend = OVERLAY_END (overlay); | |
3016 | startpos = OVERLAY_POSITION (ostart); | |
3017 | if (end < startpos) | |
3018 | { | |
3019 | if (startpos < next) | |
3020 | next = startpos; | |
3021 | break; | |
3022 | } | |
3023 | endpos = OVERLAY_POSITION (oend); | |
7723e095 MR |
3024 | /* Count an interval if it overlaps the range, is empty at the |
3025 | start of the range, or is empty at END provided END denotes the | |
3026 | end of the buffer. */ | |
74514898 | 3027 | if ((beg < endpos && startpos < end) |
7723e095 MR |
3028 | || (startpos == endpos |
3029 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
3030 | { |
3031 | if (idx == len) | |
3032 | { | |
3033 | if (extend) | |
3034 | { | |
0065d054 PE |
3035 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
3036 | sizeof *vec); | |
74514898 | 3037 | *vec_ptr = vec; |
0065d054 | 3038 | len = *len_ptr; |
74514898 RS |
3039 | } |
3040 | else | |
3041 | inhibit_storing = 1; | |
3042 | } | |
3043 | ||
3044 | if (!inhibit_storing) | |
3045 | vec[idx] = overlay; | |
3046 | idx++; | |
3047 | } | |
3048 | else if (endpos < beg && endpos > prev) | |
3049 | prev = endpos; | |
3050 | } | |
fc04fa47 | 3051 | |
74514898 RS |
3052 | if (next_ptr) |
3053 | *next_ptr = next; | |
3054 | if (prev_ptr) | |
3055 | *prev_ptr = prev; | |
3056 | return idx; | |
3057 | } | |
09a22085 GM |
3058 | |
3059 | ||
37ef52bb | 3060 | /* Return true if there exists an overlay with a non-nil |
09a22085 GM |
3061 | `mouse-face' property overlapping OVERLAY. */ |
3062 | ||
37ef52bb | 3063 | bool |
d3da34e0 | 3064 | mouse_face_overlay_overlaps (Lisp_Object overlay) |
09a22085 | 3065 | { |
d311d28c PE |
3066 | ptrdiff_t start = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3067 | ptrdiff_t end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
21514da7 | 3068 | ptrdiff_t n, i, size; |
09a22085 | 3069 | Lisp_Object *v, tem; |
177c0ea7 | 3070 | |
bfd8410f | 3071 | size = 10; |
38182d90 | 3072 | v = alloca (size * sizeof *v); |
bfd8410f GM |
3073 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); |
3074 | if (n > size) | |
09a22085 | 3075 | { |
38182d90 | 3076 | v = alloca (n * sizeof *v); |
09a22085 GM |
3077 | overlays_in (start, end, 0, &v, &n, NULL, NULL); |
3078 | } | |
3079 | ||
3080 | for (i = 0; i < n; ++i) | |
3081 | if (!EQ (v[i], overlay) | |
3082 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
3083 | !NILP (tem))) | |
3084 | break; | |
3085 | ||
3086 | return i < n; | |
3087 | } | |
3088 | ||
3089 | ||
74514898 | 3090 | \f |
fc04fa47 | 3091 | /* Fast function to just test if we're at an overlay boundary. */ |
37ef52bb | 3092 | bool |
d311d28c | 3093 | overlay_touches_p (ptrdiff_t pos) |
fc04fa47 | 3094 | { |
2410d73a SM |
3095 | Lisp_Object overlay; |
3096 | struct Lisp_Overlay *tail; | |
fc04fa47 | 3097 | |
fd318b54 | 3098 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
fc04fa47 | 3099 | { |
d311d28c | 3100 | ptrdiff_t endpos; |
fc04fa47 | 3101 | |
2410d73a | 3102 | XSETMISC (overlay ,tail); |
22657b40 | 3103 | eassert (OVERLAYP (overlay)); |
fc04fa47 KH |
3104 | |
3105 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3106 | if (endpos < pos) | |
3107 | break; | |
3108 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
3109 | return 1; | |
3110 | } | |
3111 | ||
fd318b54 | 3112 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
fc04fa47 | 3113 | { |
d311d28c | 3114 | ptrdiff_t startpos; |
fc04fa47 | 3115 | |
2410d73a | 3116 | XSETMISC (overlay, tail); |
22657b40 | 3117 | eassert (OVERLAYP (overlay)); |
fc04fa47 KH |
3118 | |
3119 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3120 | if (pos < startpos) | |
3121 | break; | |
3122 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
3123 | return 1; | |
3124 | } | |
3125 | return 0; | |
3126 | } | |
2eec3b4e | 3127 | \f |
5985d248 KH |
3128 | struct sortvec |
3129 | { | |
3130 | Lisp_Object overlay; | |
d311d28c | 3131 | ptrdiff_t beg, end; |
fadf4e30 | 3132 | EMACS_INT priority; |
5985d248 KH |
3133 | }; |
3134 | ||
3135 | static int | |
d3da34e0 | 3136 | compare_overlays (const void *v1, const void *v2) |
5985d248 | 3137 | { |
dfcf069d AS |
3138 | const struct sortvec *s1 = (const struct sortvec *) v1; |
3139 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 | 3140 | if (s1->priority != s2->priority) |
c20998a7 | 3141 | return s1->priority < s2->priority ? -1 : 1; |
5985d248 | 3142 | if (s1->beg != s2->beg) |
c20998a7 | 3143 | return s1->beg < s2->beg ? -1 : 1; |
5985d248 | 3144 | if (s1->end != s2->end) |
c20998a7 | 3145 | return s2->end < s1->end ? -1 : 1; |
cae07000 SM |
3146 | /* Avoid the non-determinism of qsort by choosing an arbitrary ordering |
3147 | between "equal" overlays. The result can still change between | |
3148 | invocations of Emacs, but it won't change in the middle of | |
3149 | `find_field' (bug#6830). */ | |
61ddb1b9 SM |
3150 | if (!EQ (s1->overlay, s2->overlay)) |
3151 | return XLI (s1->overlay) < XLI (s2->overlay) ? -1 : 1; | |
5985d248 KH |
3152 | return 0; |
3153 | } | |
3154 | ||
3155 | /* Sort an array of overlays by priority. The array is modified in place. | |
3156 | The return value is the new size; this may be smaller than the original | |
3157 | size if some of the overlays were invalid or were window-specific. */ | |
b081724f PE |
3158 | ptrdiff_t |
3159 | sort_overlays (Lisp_Object *overlay_vec, ptrdiff_t noverlays, struct window *w) | |
5985d248 | 3160 | { |
b081724f | 3161 | ptrdiff_t i, j; |
59ac2d13 EZ |
3162 | USE_SAFE_ALLOCA; |
3163 | struct sortvec *sortvec; | |
3164 | ||
3165 | SAFE_NALLOCA (sortvec, 1, noverlays); | |
5985d248 KH |
3166 | |
3167 | /* Put the valid and relevant overlays into sortvec. */ | |
3168 | ||
3169 | for (i = 0, j = 0; i < noverlays; i++) | |
3170 | { | |
0fa767e7 | 3171 | Lisp_Object tem; |
c99fc30f | 3172 | Lisp_Object overlay; |
5985d248 | 3173 | |
c99fc30f | 3174 | overlay = overlay_vec[i]; |
22657b40 | 3175 | if (OVERLAYP (overlay) |
5985d248 KH |
3176 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 |
3177 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
3178 | { | |
0fa767e7 KH |
3179 | /* If we're interested in a specific window, then ignore |
3180 | overlays that are limited to some other window. */ | |
3181 | if (w) | |
5985d248 | 3182 | { |
28545e04 | 3183 | Lisp_Object window; |
0fa767e7 KH |
3184 | |
3185 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3186 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 3187 | continue; |
5985d248 | 3188 | } |
0fa767e7 KH |
3189 | |
3190 | /* This overlay is good and counts: put it into sortvec. */ | |
3191 | sortvec[j].overlay = overlay; | |
3192 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3193 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3194 | tem = Foverlay_get (overlay, Qpriority); | |
3195 | if (INTEGERP (tem)) | |
3196 | sortvec[j].priority = XINT (tem); | |
3197 | else | |
3198 | sortvec[j].priority = 0; | |
3199 | j++; | |
5985d248 KH |
3200 | } |
3201 | } | |
3202 | noverlays = j; | |
3203 | ||
3204 | /* Sort the overlays into the proper order: increasing priority. */ | |
3205 | ||
3206 | if (noverlays > 1) | |
3207 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
3208 | ||
3209 | for (i = 0; i < noverlays; i++) | |
3210 | overlay_vec[i] = sortvec[i].overlay; | |
59ac2d13 EZ |
3211 | |
3212 | SAFE_FREE (); | |
5985d248 KH |
3213 | return (noverlays); |
3214 | } | |
3215 | \f | |
bbbe9545 KH |
3216 | struct sortstr |
3217 | { | |
cb26008f | 3218 | Lisp_Object string, string2; |
93cb6be3 | 3219 | ptrdiff_t size; |
8961a454 | 3220 | EMACS_INT priority; |
bbbe9545 KH |
3221 | }; |
3222 | ||
e8185fa8 KH |
3223 | struct sortstrlist |
3224 | { | |
3225 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
67c36fce PE |
3226 | ptrdiff_t size; /* Allocated length of that array. */ |
3227 | ptrdiff_t used; /* How much of the array is currently in use. */ | |
0065d054 | 3228 | ptrdiff_t bytes; /* Total length of the strings in buf. */ |
e8185fa8 KH |
3229 | }; |
3230 | ||
3231 | /* Buffers for storing information about the overlays touching a given | |
3232 | position. These could be automatic variables in overlay_strings, but | |
3233 | it's more efficient to hold onto the memory instead of repeatedly | |
3234 | allocating and freeing it. */ | |
3235 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 3236 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
3237 | |
3238 | /* Allocated length of overlay_str_buf. */ | |
fe5c5d37 | 3239 | static ptrdiff_t overlay_str_len; |
e8185fa8 | 3240 | |
bbbe9545 KH |
3241 | /* A comparison function suitable for passing to qsort. */ |
3242 | static int | |
d3da34e0 | 3243 | cmp_for_strings (const void *as1, const void *as2) |
bbbe9545 KH |
3244 | { |
3245 | struct sortstr *s1 = (struct sortstr *)as1; | |
3246 | struct sortstr *s2 = (struct sortstr *)as2; | |
3247 | if (s1->size != s2->size) | |
c20998a7 | 3248 | return s2->size < s1->size ? -1 : 1; |
bbbe9545 | 3249 | if (s1->priority != s2->priority) |
c20998a7 | 3250 | return s1->priority < s2->priority ? -1 : 1; |
bbbe9545 KH |
3251 | return 0; |
3252 | } | |
3253 | ||
e8185fa8 | 3254 | static void |
93cb6be3 PE |
3255 | record_overlay_string (struct sortstrlist *ssl, Lisp_Object str, |
3256 | Lisp_Object str2, Lisp_Object pri, ptrdiff_t size) | |
e8185fa8 | 3257 | { |
d311d28c | 3258 | ptrdiff_t nbytes; |
43d27a72 | 3259 | |
e8185fa8 | 3260 | if (ssl->used == ssl->size) |
0065d054 | 3261 | ssl->buf = xpalloc (ssl->buf, &ssl->size, 5, -1, sizeof *ssl->buf); |
e8185fa8 | 3262 | ssl->buf[ssl->used].string = str; |
cb26008f | 3263 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
3264 | ssl->buf[ssl->used].size = size; |
3265 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
3266 | ssl->used++; | |
43d27a72 | 3267 | |
4b4deea2 | 3268 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 3269 | nbytes = SCHARS (str); |
43d27a72 | 3270 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
3271 | nbytes = count_size_as_multibyte (SDATA (str), |
3272 | SBYTES (str)); | |
43d27a72 | 3273 | else |
d5db4077 | 3274 | nbytes = SBYTES (str); |
43d27a72 | 3275 | |
0065d054 PE |
3276 | if (INT_ADD_OVERFLOW (ssl->bytes, nbytes)) |
3277 | memory_full (SIZE_MAX); | |
43d27a72 RS |
3278 | ssl->bytes += nbytes; |
3279 | ||
cb26008f | 3280 | if (STRINGP (str2)) |
43d27a72 | 3281 | { |
4b4deea2 | 3282 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 3283 | nbytes = SCHARS (str2); |
43d27a72 | 3284 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
3285 | nbytes = count_size_as_multibyte (SDATA (str2), |
3286 | SBYTES (str2)); | |
43d27a72 | 3287 | else |
d5db4077 | 3288 | nbytes = SBYTES (str2); |
43d27a72 | 3289 | |
0065d054 PE |
3290 | if (INT_ADD_OVERFLOW (ssl->bytes, nbytes)) |
3291 | memory_full (SIZE_MAX); | |
43d27a72 RS |
3292 | ssl->bytes += nbytes; |
3293 | } | |
e8185fa8 | 3294 | } |
bbbe9545 KH |
3295 | |
3296 | /* Return the concatenation of the strings associated with overlays that | |
3297 | begin or end at POS, ignoring overlays that are specific to a window | |
3298 | other than W. The strings are concatenated in the appropriate order: | |
3299 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
3300 | lower. Normally all of the after-strings come first, but zero-sized |
3301 | overlays have their after-strings ride along with the before-strings | |
3302 | because it would look strange to print them inside-out. | |
3303 | ||
3304 | Returns the string length, and stores the contents indirectly through | |
3305 | PSTR, if that variable is non-null. The string may be overwritten by | |
3306 | subsequent calls. */ | |
6b5d3b89 | 3307 | |
d311d28c PE |
3308 | ptrdiff_t |
3309 | overlay_strings (ptrdiff_t pos, struct window *w, unsigned char **pstr) | |
bbbe9545 | 3310 | { |
28545e04 | 3311 | Lisp_Object overlay, window, str; |
2410d73a | 3312 | struct Lisp_Overlay *ov; |
d311d28c | 3313 | ptrdiff_t startpos, endpos; |
37ef52bb | 3314 | bool multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
bbbe9545 | 3315 | |
e8185fa8 KH |
3316 | overlay_heads.used = overlay_heads.bytes = 0; |
3317 | overlay_tails.used = overlay_tails.bytes = 0; | |
fd318b54 | 3318 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
bbbe9545 | 3319 | { |
2410d73a | 3320 | XSETMISC (overlay, ov); |
c2d5b10f | 3321 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3322 | |
3323 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3324 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3325 | if (endpos < pos) | |
3326 | break; | |
3327 | if (endpos != pos && startpos != pos) | |
3328 | continue; | |
3329 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3330 | if (WINDOWP (window) && XWINDOW (window) != w) |
bbbe9545 | 3331 | continue; |
e8185fa8 KH |
3332 | if (startpos == pos |
3333 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3334 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3335 | (startpos == endpos |
3336 | ? Foverlay_get (overlay, Qafter_string) | |
3337 | : Qnil), | |
3338 | Foverlay_get (overlay, Qpriority), | |
3339 | endpos - startpos); | |
3340 | else if (endpos == pos | |
3341 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3342 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3343 | Foverlay_get (overlay, Qpriority), |
3344 | endpos - startpos); | |
bbbe9545 | 3345 | } |
fd318b54 | 3346 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
bbbe9545 | 3347 | { |
2410d73a SM |
3348 | XSETMISC (overlay, ov); |
3349 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3350 | |
3351 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3352 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3353 | if (startpos > pos) | |
3354 | break; | |
e8185fa8 KH |
3355 | if (endpos != pos && startpos != pos) |
3356 | continue; | |
3357 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3358 | if (WINDOWP (window) && XWINDOW (window) != w) |
e8185fa8 | 3359 | continue; |
e8185fa8 KH |
3360 | if (startpos == pos |
3361 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3362 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3363 | (startpos == endpos |
3364 | ? Foverlay_get (overlay, Qafter_string) | |
3365 | : Qnil), | |
3366 | Foverlay_get (overlay, Qpriority), | |
3367 | endpos - startpos); | |
3368 | else if (endpos == pos | |
3369 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3370 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3371 | Foverlay_get (overlay, Qpriority), |
3372 | endpos - startpos); | |
bbbe9545 | 3373 | } |
e8185fa8 KH |
3374 | if (overlay_tails.used > 1) |
3375 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3376 | cmp_for_strings); | |
3377 | if (overlay_heads.used > 1) | |
3378 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3379 | cmp_for_strings); | |
3380 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3381 | { |
e8185fa8 | 3382 | Lisp_Object tem; |
d311d28c | 3383 | ptrdiff_t i; |
9f4d7cde | 3384 | unsigned char *p; |
0065d054 | 3385 | ptrdiff_t total; |
bbbe9545 | 3386 | |
0065d054 PE |
3387 | if (INT_ADD_OVERFLOW (overlay_heads.bytes, overlay_tails.bytes)) |
3388 | memory_full (SIZE_MAX); | |
3389 | total = overlay_heads.bytes + overlay_tails.bytes; | |
bbbe9545 | 3390 | if (total > overlay_str_len) |
0065d054 PE |
3391 | overlay_str_buf = xpalloc (overlay_str_buf, &overlay_str_len, |
3392 | total - overlay_str_len, -1, 1); | |
3393 | ||
bbbe9545 | 3394 | p = overlay_str_buf; |
e8185fa8 | 3395 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3396 | { |
d311d28c | 3397 | ptrdiff_t nbytes; |
e8185fa8 | 3398 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3399 | nbytes = copy_text (SDATA (tem), p, |
3400 | SBYTES (tem), | |
43d27a72 RS |
3401 | STRING_MULTIBYTE (tem), multibyte); |
3402 | p += nbytes; | |
bbbe9545 | 3403 | } |
e8185fa8 | 3404 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3405 | { |
d311d28c | 3406 | ptrdiff_t nbytes; |
e8185fa8 | 3407 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3408 | nbytes = copy_text (SDATA (tem), p, |
3409 | SBYTES (tem), | |
43d27a72 RS |
3410 | STRING_MULTIBYTE (tem), multibyte); |
3411 | p += nbytes; | |
cb26008f KH |
3412 | tem = overlay_heads.buf[i].string2; |
3413 | if (STRINGP (tem)) | |
3414 | { | |
d5db4077 KR |
3415 | nbytes = copy_text (SDATA (tem), p, |
3416 | SBYTES (tem), | |
43d27a72 RS |
3417 | STRING_MULTIBYTE (tem), multibyte); |
3418 | p += nbytes; | |
cb26008f | 3419 | } |
bbbe9545 | 3420 | } |
cb26008f | 3421 | if (p != overlay_str_buf + total) |
1088b922 | 3422 | emacs_abort (); |
bbbe9545 KH |
3423 | if (pstr) |
3424 | *pstr = overlay_str_buf; | |
e8185fa8 | 3425 | return total; |
bbbe9545 | 3426 | } |
e8185fa8 | 3427 | return 0; |
bbbe9545 KH |
3428 | } |
3429 | \f | |
5c4f68f1 | 3430 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3431 | |
2eec3b4e | 3432 | void |
d311d28c | 3433 | recenter_overlay_lists (struct buffer *buf, ptrdiff_t pos) |
2eec3b4e | 3434 | { |
2410d73a SM |
3435 | Lisp_Object overlay, beg, end; |
3436 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3437 | |
3438 | /* See if anything in overlays_before should move to overlays_after. */ | |
3439 | ||
3440 | /* We don't strictly need prev in this loop; it should always be nil. | |
3441 | But we use it for symmetry and in case that should cease to be true | |
3442 | with some future change. */ | |
2410d73a | 3443 | prev = NULL; |
fd318b54 | 3444 | for (tail = buf->overlays_before; tail; prev = tail, tail = next) |
1ab256cb | 3445 | { |
2410d73a SM |
3446 | next = tail->next; |
3447 | XSETMISC (overlay, tail); | |
22657b40 | 3448 | eassert (OVERLAYP (overlay)); |
1ab256cb | 3449 | |
2eec3b4e RS |
3450 | beg = OVERLAY_START (overlay); |
3451 | end = OVERLAY_END (overlay); | |
1ab256cb | 3452 | |
2eec3b4e | 3453 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3454 | { |
2eec3b4e | 3455 | /* OVERLAY needs to be moved. */ |
d311d28c | 3456 | ptrdiff_t where = OVERLAY_POSITION (beg); |
2410d73a | 3457 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3458 | |
3459 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3460 | if (prev) |
3461 | prev->next = next; | |
2eec3b4e | 3462 | else |
0c94c8d6 | 3463 | set_buffer_overlays_before (buf, next); |
2eec3b4e RS |
3464 | |
3465 | /* Search thru overlays_after for where to put it. */ | |
2410d73a | 3466 | other_prev = NULL; |
fd318b54 | 3467 | for (other = buf->overlays_after; other; |
2410d73a | 3468 | other_prev = other, other = other->next) |
1ab256cb | 3469 | { |
6af718a4 | 3470 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3471 | |
2410d73a | 3472 | XSETMISC (otheroverlay, other); |
22657b40 | 3473 | eassert (OVERLAYP (otheroverlay)); |
2eec3b4e RS |
3474 | |
3475 | otherbeg = OVERLAY_START (otheroverlay); | |
3476 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3477 | break; | |
1ab256cb | 3478 | } |
2eec3b4e RS |
3479 | |
3480 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3481 | tail->next = other; |
3482 | if (other_prev) | |
3483 | other_prev->next = tail; | |
1ab256cb | 3484 | else |
0c94c8d6 | 3485 | set_buffer_overlays_after (buf, tail); |
2eec3b4e | 3486 | tail = prev; |
1ab256cb | 3487 | } |
2eec3b4e RS |
3488 | else |
3489 | /* We've reached the things that should stay in overlays_before. | |
3490 | All the rest of overlays_before must end even earlier, | |
3491 | so stop now. */ | |
3492 | break; | |
3493 | } | |
3494 | ||
3495 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a | 3496 | prev = NULL; |
fd318b54 | 3497 | for (tail = buf->overlays_after; tail; prev = tail, tail = next) |
2eec3b4e | 3498 | { |
2410d73a SM |
3499 | next = tail->next; |
3500 | XSETMISC (overlay, tail); | |
22657b40 | 3501 | eassert (OVERLAYP (overlay)); |
2eec3b4e RS |
3502 | |
3503 | beg = OVERLAY_START (overlay); | |
3504 | end = OVERLAY_END (overlay); | |
3505 | ||
3506 | /* Stop looking, when we know that nothing further | |
3507 | can possibly end before POS. */ | |
3508 | if (OVERLAY_POSITION (beg) > pos) | |
3509 | break; | |
3510 | ||
3511 | if (OVERLAY_POSITION (end) <= pos) | |
3512 | { | |
3513 | /* OVERLAY needs to be moved. */ | |
d311d28c | 3514 | ptrdiff_t where = OVERLAY_POSITION (end); |
2410d73a | 3515 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3516 | |
3517 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3518 | if (prev) |
3519 | prev->next = next; | |
2eec3b4e | 3520 | else |
0c94c8d6 | 3521 | set_buffer_overlays_after (buf, next); |
2eec3b4e RS |
3522 | |
3523 | /* Search thru overlays_before for where to put it. */ | |
2410d73a | 3524 | other_prev = NULL; |
fd318b54 | 3525 | for (other = buf->overlays_before; other; |
2410d73a | 3526 | other_prev = other, other = other->next) |
2eec3b4e RS |
3527 | { |
3528 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3529 | |
2410d73a | 3530 | XSETMISC (otheroverlay, other); |
22657b40 | 3531 | eassert (OVERLAYP (otheroverlay)); |
2eec3b4e RS |
3532 | |
3533 | otherend = OVERLAY_END (otheroverlay); | |
3534 | if (OVERLAY_POSITION (otherend) <= where) | |
3535 | break; | |
3536 | } | |
3537 | ||
3538 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3539 | tail->next = other; |
3540 | if (other_prev) | |
3541 | other_prev->next = tail; | |
2eec3b4e | 3542 | else |
0c94c8d6 | 3543 | set_buffer_overlays_before (buf, tail); |
2eec3b4e RS |
3544 | tail = prev; |
3545 | } | |
3546 | } | |
3547 | ||
c2d5b10f | 3548 | buf->overlay_center = pos; |
2eec3b4e | 3549 | } |
2b1bdf65 | 3550 | |
423cdb46 | 3551 | void |
d311d28c | 3552 | adjust_overlays_for_insert (ptrdiff_t pos, ptrdiff_t length) |
423cdb46 KH |
3553 | { |
3554 | /* After an insertion, the lists are still sorted properly, | |
3555 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3556 | if (current_buffer->overlay_center >= pos) |
3557 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3558 | } |
3559 | ||
3560 | void | |
d311d28c | 3561 | adjust_overlays_for_delete (ptrdiff_t pos, ptrdiff_t length) |
423cdb46 | 3562 | { |
c2d5b10f | 3563 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3564 | /* The deletion was to our right. No change needed; the before- and |
3565 | after-lists are still consistent. */ | |
3566 | ; | |
d311d28c | 3567 | else if (current_buffer->overlay_center - pos > length) |
423cdb46 KH |
3568 | /* The deletion was to our left. We need to adjust the center value |
3569 | to account for the change in position, but the lists are consistent | |
3570 | given the new value. */ | |
c2d5b10f | 3571 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3572 | else |
3573 | /* We're right in the middle. There might be things on the after-list | |
3574 | that now belong on the before-list. Recentering will move them, | |
3575 | and also update the center point. */ | |
3576 | recenter_overlay_lists (current_buffer, pos); | |
3577 | } | |
3578 | ||
2b1bdf65 KH |
3579 | /* Fix up overlays that were garbled as a result of permuting markers |
3580 | in the range START through END. Any overlay with at least one | |
3581 | endpoint in this range will need to be unlinked from the overlay | |
3582 | list and reinserted in its proper place. | |
3583 | Such an overlay might even have negative size at this point. | |
6b61353c | 3584 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3585 | void |
d311d28c | 3586 | fix_start_end_in_overlays (register ptrdiff_t start, register ptrdiff_t end) |
2b1bdf65 | 3587 | { |
6af718a4 | 3588 | Lisp_Object overlay; |
5df8f01b PE |
3589 | struct Lisp_Overlay *before_list IF_LINT (= NULL); |
3590 | struct Lisp_Overlay *after_list IF_LINT (= NULL); | |
1138e742 KR |
3591 | /* These are either nil, indicating that before_list or after_list |
3592 | should be assigned, or the cons cell the cdr of which should be | |
3593 | assigned. */ | |
2410d73a | 3594 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 | 3595 | /* 'Parent', likewise, indicates a cons cell or |
fd318b54 | 3596 | current_buffer->overlays_before or overlays_after, depending |
1138e742 | 3597 | which loop we're in. */ |
2410d73a | 3598 | struct Lisp_Overlay *tail, *parent; |
d311d28c | 3599 | ptrdiff_t startpos, endpos; |
2b1bdf65 KH |
3600 | |
3601 | /* This algorithm shifts links around instead of consing and GCing. | |
3602 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3603 | well-formed list except that its last element, the CDR of beforep |
3604 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3605 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3606 | that before_list isn't initialized, although it may look | |
3607 | strange. */ | |
fd318b54 | 3608 | for (parent = NULL, tail = current_buffer->overlays_before; tail;) |
2b1bdf65 | 3609 | { |
2410d73a | 3610 | XSETMISC (overlay, tail); |
6b61353c | 3611 | |
2b1bdf65 | 3612 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
6b61353c KH |
3613 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3614 | ||
3615 | /* If the overlay is backwards, make it empty. */ | |
3616 | if (endpos < startpos) | |
3617 | { | |
3618 | startpos = endpos; | |
3619 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3620 | Qnil); | |
3621 | } | |
3622 | ||
2b1bdf65 KH |
3623 | if (endpos < start) |
3624 | break; | |
60ebfdf3 | 3625 | |
2b1bdf65 KH |
3626 | if (endpos < end |
3627 | || (startpos >= start && startpos < end)) | |
3628 | { | |
2b1bdf65 KH |
3629 | /* Add it to the end of the wrong list. Later on, |
3630 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3631 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3632 | { |
2410d73a | 3633 | if (!afterp) |
1138e742 KR |
3634 | after_list = tail; |
3635 | else | |
2410d73a | 3636 | afterp->next = tail; |
1138e742 | 3637 | afterp = tail; |
2b1bdf65 KH |
3638 | } |
3639 | else | |
3640 | { | |
2410d73a | 3641 | if (!beforep) |
1138e742 KR |
3642 | before_list = tail; |
3643 | else | |
2410d73a | 3644 | beforep->next = tail; |
1138e742 | 3645 | beforep = tail; |
2b1bdf65 | 3646 | } |
2410d73a | 3647 | if (!parent) |
0c94c8d6 | 3648 | set_buffer_overlays_before (current_buffer, tail->next); |
1138e742 | 3649 | else |
2410d73a SM |
3650 | parent->next = tail->next; |
3651 | tail = tail->next; | |
2b1bdf65 KH |
3652 | } |
3653 | else | |
2410d73a | 3654 | parent = tail, tail = parent->next; |
2b1bdf65 | 3655 | } |
fd318b54 | 3656 | for (parent = NULL, tail = current_buffer->overlays_after; tail;) |
2b1bdf65 | 3657 | { |
2410d73a | 3658 | XSETMISC (overlay, tail); |
6b61353c | 3659 | |
2b1bdf65 | 3660 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
6b61353c KH |
3661 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3662 | ||
3663 | /* If the overlay is backwards, make it empty. */ | |
3664 | if (endpos < startpos) | |
3665 | { | |
3666 | startpos = endpos; | |
3667 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3668 | Qnil); |
6b61353c KH |
3669 | } |
3670 | ||
2b1bdf65 KH |
3671 | if (startpos >= end) |
3672 | break; | |
6b61353c | 3673 | |
2b1bdf65 KH |
3674 | if (startpos >= start |
3675 | || (endpos >= start && endpos < end)) | |
3676 | { | |
c2d5b10f | 3677 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3678 | { |
2410d73a | 3679 | if (!afterp) |
1138e742 KR |
3680 | after_list = tail; |
3681 | else | |
2410d73a | 3682 | afterp->next = tail; |
1138e742 | 3683 | afterp = tail; |
2b1bdf65 KH |
3684 | } |
3685 | else | |
3686 | { | |
2410d73a | 3687 | if (!beforep) |
1138e742 KR |
3688 | before_list = tail; |
3689 | else | |
2410d73a | 3690 | beforep->next = tail; |
1138e742 | 3691 | beforep = tail; |
2b1bdf65 | 3692 | } |
2410d73a | 3693 | if (!parent) |
0c94c8d6 | 3694 | set_buffer_overlays_after (current_buffer, tail->next); |
1138e742 | 3695 | else |
2410d73a SM |
3696 | parent->next = tail->next; |
3697 | tail = tail->next; | |
2b1bdf65 KH |
3698 | } |
3699 | else | |
2410d73a | 3700 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3701 | } |
3702 | ||
3703 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3704 | and let the recenter function make it sane again. */ | |
2410d73a | 3705 | if (beforep) |
1138e742 | 3706 | { |
fd318b54 | 3707 | beforep->next = current_buffer->overlays_before; |
0c94c8d6 | 3708 | set_buffer_overlays_before (current_buffer, before_list); |
1138e742 | 3709 | } |
2b1bdf65 | 3710 | |
2410d73a | 3711 | if (afterp) |
1138e742 | 3712 | { |
fd318b54 | 3713 | afterp->next = current_buffer->overlays_after; |
0c94c8d6 | 3714 | set_buffer_overlays_after (current_buffer, after_list); |
1138e742 | 3715 | } |
c2d5b10f | 3716 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3717 | } |
3b06f880 KH |
3718 | |
3719 | /* We have two types of overlay: the one whose ending marker is | |
3720 | after-insertion-marker (this is the usual case) and the one whose | |
3721 | ending marker is before-insertion-marker. When `overlays_before' | |
3722 | contains overlays of the latter type and the former type in this | |
3723 | order and both overlays end at inserting position, inserting a text | |
3724 | increases only the ending marker of the latter type, which results | |
3725 | in incorrect ordering of `overlays_before'. | |
3726 | ||
3727 | This function fixes ordering of overlays in the slot | |
3728 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3729 | was at PREV, and now is at POS. */ | |
3730 | ||
01136e9b | 3731 | void |
d311d28c | 3732 | fix_overlays_before (struct buffer *bp, ptrdiff_t prev, ptrdiff_t pos) |
3b06f880 | 3733 | { |
2410d73a | 3734 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
fd318b54 | 3735 | struct Lisp_Overlay *tail = bp->overlays_before, *parent = NULL, *right_pair; |
2410d73a | 3736 | Lisp_Object tem; |
d311d28c | 3737 | ptrdiff_t end IF_LINT (= 0); |
3b06f880 KH |
3738 | |
3739 | /* After the insertion, the several overlays may be in incorrect | |
3740 | order. The possibility is that, in the list `overlays_before', | |
3741 | an overlay which ends at POS appears after an overlay which ends | |
3742 | at PREV. Since POS is greater than PREV, we must fix the | |
3743 | ordering of these overlays, by moving overlays ends at POS before | |
3744 | the overlays ends at PREV. */ | |
3745 | ||
3746 | /* At first, find a place where disordered overlays should be linked | |
3747 | in. It is where an overlay which end before POS exists. (i.e. an | |
3748 | overlay whose ending marker is after-insertion-marker if disorder | |
3749 | exists). */ | |
2410d73a SM |
3750 | while (tail |
3751 | && (XSETMISC (tem, tail), | |
3752 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3753 | { |
3754 | parent = tail; | |
2410d73a | 3755 | tail = tail->next; |
1138e742 | 3756 | } |
3b06f880 KH |
3757 | |
3758 | /* If we don't find such an overlay, | |
3759 | or the found one ends before PREV, | |
3760 | or the found one is the last one in the list, | |
3761 | we don't have to fix anything. */ | |
f93ad4cf | 3762 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3763 | return; |
3764 | ||
1138e742 KR |
3765 | right_pair = parent; |
3766 | parent = tail; | |
2410d73a | 3767 | tail = tail->next; |
3b06f880 | 3768 | |
1138e742 | 3769 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3770 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3771 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3772 | we found an overlay which ends before PREV, the remaining | |
3773 | overlays are in correct order. */ | |
2410d73a | 3774 | while (tail) |
3b06f880 | 3775 | { |
2410d73a SM |
3776 | XSETMISC (tem, tail); |
3777 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3778 | |
3779 | if (end == pos) | |
3780 | { /* This overlay is disordered. */ | |
2410d73a | 3781 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3782 | |
3783 | /* Unlink the found overlay. */ | |
2410d73a SM |
3784 | tail = found->next; |
3785 | parent->next = tail; | |
1138e742 KR |
3786 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3787 | and link it into the right place. */ | |
2410d73a | 3788 | if (!right_pair) |
1138e742 | 3789 | { |
fd318b54 | 3790 | found->next = bp->overlays_before; |
0c94c8d6 | 3791 | set_buffer_overlays_before (bp, found); |
1138e742 KR |
3792 | } |
3793 | else | |
3794 | { | |
2410d73a SM |
3795 | found->next = right_pair->next; |
3796 | right_pair->next = found; | |
1138e742 | 3797 | } |
3b06f880 KH |
3798 | } |
3799 | else if (end == prev) | |
1138e742 KR |
3800 | { |
3801 | parent = tail; | |
2410d73a | 3802 | tail = tail->next; |
1138e742 | 3803 | } |
3b06f880 KH |
3804 | else /* No more disordered overlay. */ |
3805 | break; | |
3806 | } | |
3807 | } | |
2eec3b4e | 3808 | \f |
52f8ec73 | 3809 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 | 3810 | doc: /* Return t if OBJECT is an overlay. */) |
5842a27b | 3811 | (Lisp_Object object) |
52f8ec73 JB |
3812 | { |
3813 | return (OVERLAYP (object) ? Qt : Qnil); | |
3814 | } | |
3815 | ||
acac2700 | 3816 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3817 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3818 | If omitted, BUFFER defaults to the current buffer. |
3819 | BEG and END may be integers or markers. | |
a625ee20 RS |
3820 | The fourth arg FRONT-ADVANCE, if non-nil, makes the marker |
3821 | for the front of the overlay advance when text is inserted there | |
63af6055 | 3822 | \(which means the text *is not* included in the overlay). |
a625ee20 RS |
3823 | The fifth arg REAR-ADVANCE, if non-nil, makes the marker |
3824 | for the rear of the overlay advance when text is inserted there | |
63af6055 | 3825 | \(which means the text *is* included in the overlay). */) |
5842a27b | 3826 | (Lisp_Object beg, Lisp_Object end, Lisp_Object buffer, Lisp_Object front_advance, Lisp_Object rear_advance) |
2eec3b4e RS |
3827 | { |
3828 | Lisp_Object overlay; | |
5c4f68f1 | 3829 | struct buffer *b; |
2eec3b4e | 3830 | |
5c4f68f1 | 3831 | if (NILP (buffer)) |
67180c6a | 3832 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3833 | else |
b7826503 | 3834 | CHECK_BUFFER (buffer); |
883047b9 JB |
3835 | if (MARKERP (beg) |
3836 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3837 | error ("Marker points into wrong buffer"); | |
3838 | if (MARKERP (end) | |
3839 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3840 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3841 | |
b7826503 PJ |
3842 | CHECK_NUMBER_COERCE_MARKER (beg); |
3843 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3844 | |
883047b9 | 3845 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3846 | { |
c99fc30f KH |
3847 | Lisp_Object temp; |
3848 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3849 | } |
883047b9 JB |
3850 | |
3851 | b = XBUFFER (buffer); | |
3852 | ||
3853 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3854 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3855 | |
acac2700 RS |
3856 | if (!NILP (front_advance)) |
3857 | XMARKER (beg)->insertion_type = 1; | |
3858 | if (!NILP (rear_advance)) | |
3859 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3860 | |
d7a7fda3 | 3861 | overlay = build_overlay (beg, end, Qnil); |
2eec3b4e | 3862 | |
177c0ea7 | 3863 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3864 | end = OVERLAY_END (overlay); |
c2d5b10f | 3865 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a | 3866 | { |
64edc777 | 3867 | eassert (b->overlays_after || (XOVERLAY (overlay)->next == NULL)); |
090cf9db | 3868 | XOVERLAY (overlay)->next = b->overlays_after; |
0c94c8d6 | 3869 | set_buffer_overlays_after (b, XOVERLAY (overlay)); |
2410d73a | 3870 | } |
2eec3b4e | 3871 | else |
2410d73a | 3872 | { |
64edc777 | 3873 | eassert (b->overlays_before || (XOVERLAY (overlay)->next == NULL)); |
090cf9db | 3874 | XOVERLAY (overlay)->next = b->overlays_before; |
0c94c8d6 | 3875 | set_buffer_overlays_before (b, XOVERLAY (overlay)); |
2410d73a | 3876 | } |
2eec3b4e | 3877 | /* This puts it in the right list, and in the right order. */ |
c2d5b10f | 3878 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3879 | |
b61982dd JB |
3880 | /* We don't need to redisplay the region covered by the overlay, because |
3881 | the overlay has no properties at the moment. */ | |
3882 | ||
2eec3b4e RS |
3883 | return overlay; |
3884 | } | |
876aa27c RS |
3885 | \f |
3886 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3887 | ||
3888 | static void | |
d311d28c | 3889 | modify_overlay (struct buffer *buf, ptrdiff_t start, ptrdiff_t end) |
876aa27c | 3890 | { |
876aa27c RS |
3891 | if (start > end) |
3892 | { | |
d311d28c | 3893 | ptrdiff_t temp = start; |
26f545d7 GM |
3894 | start = end; |
3895 | end = temp; | |
876aa27c RS |
3896 | } |
3897 | ||
481b5054 | 3898 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3899 | |
98a07056 DA |
3900 | /* If BUF is visible, consider updating the display if ... */ |
3901 | if (buffer_window_count (buf) > 0) | |
3902 | { | |
3903 | /* ... it's visible in other window than selected, */ | |
3904 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3905 | windows_or_buffers_changed = 1; | |
3906 | /* ... or if we modify an overlay at the end of the buffer | |
3907 | and so we cannot be sure that window end is still valid. */ | |
3908 | else if (end >= ZV && start <= ZV) | |
3909 | windows_or_buffers_changed = 1; | |
3910 | } | |
876aa27c | 3911 | |
d8b9150f | 3912 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3913 | } |
2eec3b4e | 3914 | |
7b7ae965 DA |
3915 | /* Remove OVERLAY from LIST. */ |
3916 | ||
2410d73a | 3917 | static struct Lisp_Overlay * |
d3da34e0 | 3918 | unchain_overlay (struct Lisp_Overlay *list, struct Lisp_Overlay *overlay) |
2410d73a | 3919 | { |
7b7ae965 DA |
3920 | register struct Lisp_Overlay *tail, **prev = &list; |
3921 | ||
3922 | for (tail = list; tail; prev = &tail->next, tail = *prev) | |
3923 | if (tail == overlay) | |
2410d73a | 3924 | { |
7b7ae965 | 3925 | *prev = overlay->next; |
2410d73a SM |
3926 | overlay->next = NULL; |
3927 | break; | |
3928 | } | |
3929 | return list; | |
3930 | } | |
3931 | ||
4cb3e6b3 DA |
3932 | /* Remove OVERLAY from both overlay lists of B. */ |
3933 | ||
3934 | static void | |
3935 | unchain_both (struct buffer *b, Lisp_Object overlay) | |
3936 | { | |
3937 | struct Lisp_Overlay *ov = XOVERLAY (overlay); | |
3938 | ||
0c94c8d6 PE |
3939 | set_buffer_overlays_before (b, unchain_overlay (b->overlays_before, ov)); |
3940 | set_buffer_overlays_after (b, unchain_overlay (b->overlays_after, ov)); | |
fd318b54 | 3941 | eassert (XOVERLAY (overlay)->next == NULL); |
4cb3e6b3 DA |
3942 | } |
3943 | ||
5c4f68f1 | 3944 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3945 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3946 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3947 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 | 3948 | buffer. */) |
5842a27b | 3949 | (Lisp_Object overlay, Lisp_Object beg, Lisp_Object end, Lisp_Object buffer) |
2eec3b4e | 3950 | { |
471fe23d | 3951 | struct buffer *b, *ob = 0; |
0a4469c9 | 3952 | Lisp_Object obuffer; |
d311d28c | 3953 | ptrdiff_t count = SPECPDL_INDEX (); |
471fe23d | 3954 | ptrdiff_t n_beg, n_end, o_beg IF_LINT (= 0), o_end IF_LINT (= 0); |
5c4f68f1 | 3955 | |
b7826503 | 3956 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3957 | if (NILP (buffer)) |
3958 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3959 | if (NILP (buffer)) |
67180c6a | 3960 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3961 | CHECK_BUFFER (buffer); |
883047b9 | 3962 | |
471fe23d TN |
3963 | if (NILP (Fbuffer_live_p (buffer))) |
3964 | error ("Attempt to move overlay to a dead buffer"); | |
3965 | ||
883047b9 JB |
3966 | if (MARKERP (beg) |
3967 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3968 | error ("Marker points into wrong buffer"); | |
3969 | if (MARKERP (end) | |
3970 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3971 | error ("Marker points into wrong buffer"); | |
3972 | ||
b7826503 PJ |
3973 | CHECK_NUMBER_COERCE_MARKER (beg); |
3974 | CHECK_NUMBER_COERCE_MARKER (end); | |
d311d28c | 3975 | |
471fe23d | 3976 | if (XINT (beg) > XINT (end)) |
02481186 | 3977 | { |
471fe23d TN |
3978 | Lisp_Object temp; |
3979 | temp = beg; beg = end; end = temp; | |
02481186 PE |
3980 | } |
3981 | ||
9d7608b7 KH |
3982 | specbind (Qinhibit_quit, Qt); |
3983 | ||
0a4469c9 | 3984 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
79cce3f2 | 3985 | b = XBUFFER (buffer); |
471fe23d TN |
3986 | |
3987 | if (!NILP (obuffer)) | |
3988 | { | |
3989 | ob = XBUFFER (obuffer); | |
3990 | ||
3991 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3992 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3993 | ||
4cb3e6b3 | 3994 | unchain_both (ob, overlay); |
471fe23d TN |
3995 | } |
3996 | ||
3997 | /* Set the overlay boundaries, which may clip them. */ | |
3998 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3999 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
4000 | ||
4001 | n_beg = marker_position (OVERLAY_START (overlay)); | |
4002 | n_end = marker_position (OVERLAY_END (overlay)); | |
2eec3b4e | 4003 | |
c82ed728 | 4004 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 4005 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
4006 | { |
4007 | /* Redisplay where the overlay was. */ | |
471fe23d TN |
4008 | if (ob) |
4009 | modify_overlay (ob, o_beg, o_end); | |
50760c4a RS |
4010 | |
4011 | /* Redisplay where the overlay is going to be. */ | |
79cce3f2 | 4012 | modify_overlay (b, n_beg, n_end); |
50760c4a | 4013 | } |
c82ed728 JB |
4014 | else |
4015 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
4016 | { | |
79cce3f2 PE |
4017 | if (o_beg == n_beg) |
4018 | modify_overlay (b, o_end, n_end); | |
4019 | else if (o_end == n_end) | |
4020 | modify_overlay (b, o_beg, n_beg); | |
c82ed728 | 4021 | else |
79cce3f2 | 4022 | modify_overlay (b, min (o_beg, n_beg), max (o_end, n_end)); |
c82ed728 | 4023 | } |
b61982dd | 4024 | |
471fe23d TN |
4025 | /* Delete the overlay if it is empty after clipping and has the |
4026 | evaporate property. */ | |
4027 | if (n_beg == n_end && !NILP (Foverlay_get (overlay, Qevaporate))) | |
4028 | return unbind_to (count, Fdelete_overlay (overlay)); | |
02481186 | 4029 | |
471fe23d TN |
4030 | /* Put the overlay into the new buffer's overlay lists, first on the |
4031 | wrong list. */ | |
4032 | if (n_end < b->overlay_center) | |
2410d73a | 4033 | { |
fd318b54 | 4034 | XOVERLAY (overlay)->next = b->overlays_after; |
0c94c8d6 | 4035 | set_buffer_overlays_after (b, XOVERLAY (overlay)); |
2410d73a | 4036 | } |
2eec3b4e | 4037 | else |
2410d73a | 4038 | { |
fd318b54 | 4039 | XOVERLAY (overlay)->next = b->overlays_before; |
0c94c8d6 | 4040 | set_buffer_overlays_before (b, XOVERLAY (overlay)); |
2410d73a | 4041 | } |
2eec3b4e RS |
4042 | |
4043 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 4044 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 4045 | |
0a4469c9 | 4046 | return unbind_to (count, overlay); |
2eec3b4e RS |
4047 | } |
4048 | ||
4049 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 | 4050 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
5842a27b | 4051 | (Lisp_Object overlay) |
2eec3b4e | 4052 | { |
0a4469c9 | 4053 | Lisp_Object buffer; |
5c4f68f1 | 4054 | struct buffer *b; |
d311d28c | 4055 | ptrdiff_t count = SPECPDL_INDEX (); |
5c4f68f1 | 4056 | |
b7826503 | 4057 | CHECK_OVERLAY (overlay); |
52f8ec73 | 4058 | |
0a4469c9 RS |
4059 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4060 | if (NILP (buffer)) | |
4061 | return Qnil; | |
4062 | ||
4063 | b = XBUFFER (buffer); | |
0a4469c9 | 4064 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 4065 | |
4cb3e6b3 | 4066 | unchain_both (b, overlay); |
041a49a6 | 4067 | drop_overlay (b, XOVERLAY (overlay)); |
3ece337a | 4068 | |
e58c389d | 4069 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
4070 | display optimizations for the affected buffer, on the basis that |
4071 | these strings may contain newlines. This is easier to do than to | |
4072 | check for that situation during redisplay. */ | |
4073 | if (!windows_or_buffers_changed | |
4074 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
4075 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
4076 | b->prevent_redisplay_optimizations_p = 1; | |
4077 | ||
0a4469c9 | 4078 | return unbind_to (count, Qnil); |
2eec3b4e | 4079 | } |
c5e28e39 MR |
4080 | |
4081 | DEFUN ("delete-all-overlays", Fdelete_all_overlays, Sdelete_all_overlays, 0, 1, 0, | |
4082 | doc: /* Delete all overlays of BUFFER. | |
4083 | BUFFER omitted or nil means delete all overlays of the current | |
4084 | buffer. */) | |
4085 | (Lisp_Object buffer) | |
4086 | { | |
4087 | register struct buffer *buf; | |
4088 | ||
4089 | if (NILP (buffer)) | |
4090 | buf = current_buffer; | |
4091 | else | |
4092 | { | |
4093 | CHECK_BUFFER (buffer); | |
4094 | buf = XBUFFER (buffer); | |
4095 | } | |
4096 | ||
4097 | delete_all_overlays (buf); | |
26d4541d | 4098 | return Qnil; |
c5e28e39 | 4099 | } |
2eec3b4e | 4100 | \f |
8ebafa8d JB |
4101 | /* Overlay dissection functions. */ |
4102 | ||
a7ca3326 | 4103 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, |
7ee72033 | 4104 | doc: /* Return the position at which OVERLAY starts. */) |
5842a27b | 4105 | (Lisp_Object overlay) |
8ebafa8d | 4106 | { |
b7826503 | 4107 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4108 | |
4109 | return (Fmarker_position (OVERLAY_START (overlay))); | |
4110 | } | |
4111 | ||
a7ca3326 | 4112 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, |
7ee72033 | 4113 | doc: /* Return the position at which OVERLAY ends. */) |
5842a27b | 4114 | (Lisp_Object overlay) |
8ebafa8d | 4115 | { |
b7826503 | 4116 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4117 | |
4118 | return (Fmarker_position (OVERLAY_END (overlay))); | |
4119 | } | |
4120 | ||
4121 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
563f7128 LK |
4122 | doc: /* Return the buffer OVERLAY belongs to. |
4123 | Return nil if OVERLAY has been deleted. */) | |
5842a27b | 4124 | (Lisp_Object overlay) |
8ebafa8d | 4125 | { |
b7826503 | 4126 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4127 | |
4128 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
4129 | } | |
4130 | ||
4131 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 4132 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 4133 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 | 4134 | OVERLAY. */) |
5842a27b | 4135 | (Lisp_Object overlay) |
8ebafa8d | 4136 | { |
b7826503 | 4137 | CHECK_OVERLAY (overlay); |
8ebafa8d | 4138 | |
c644523b | 4139 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
4140 | } |
4141 | ||
4142 | \f | |
2eec3b4e | 4143 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
aabc29c8 | 4144 | doc: /* Return a list of the overlays that contain the character at POS. */) |
5842a27b | 4145 | (Lisp_Object pos) |
2eec3b4e | 4146 | { |
b081724f | 4147 | ptrdiff_t len, noverlays; |
2eec3b4e | 4148 | Lisp_Object *overlay_vec; |
2eec3b4e RS |
4149 | Lisp_Object result; |
4150 | ||
b7826503 | 4151 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
4152 | |
4153 | len = 10; | |
a9800ae8 | 4154 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
38182d90 | 4155 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
2eec3b4e RS |
4156 | |
4157 | /* Put all the overlays we want in a vector in overlay_vec. | |
4158 | Store the length in len. */ | |
2a77a7d7 | 4159 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
090cf9db | 4160 | NULL, NULL, 0); |
2eec3b4e RS |
4161 | |
4162 | /* Make a list of them all. */ | |
4163 | result = Flist (noverlays, overlay_vec); | |
4164 | ||
9ac0d9e0 | 4165 | xfree (overlay_vec); |
2eec3b4e RS |
4166 | return result; |
4167 | } | |
4168 | ||
74514898 | 4169 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 4170 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
4171 | Overlap means that at least one character is contained within the overlay |
4172 | and also contained within the specified region. | |
7723e095 MR |
4173 | Empty overlays are included in the result if they are located at BEG, |
4174 | between BEG and END, or at END provided END denotes the position at the | |
4175 | end of the buffer. */) | |
5842a27b | 4176 | (Lisp_Object beg, Lisp_Object end) |
74514898 | 4177 | { |
21514da7 | 4178 | ptrdiff_t len, noverlays; |
74514898 | 4179 | Lisp_Object *overlay_vec; |
74514898 RS |
4180 | Lisp_Object result; |
4181 | ||
b7826503 PJ |
4182 | CHECK_NUMBER_COERCE_MARKER (beg); |
4183 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
4184 | |
4185 | len = 10; | |
38182d90 | 4186 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
74514898 RS |
4187 | |
4188 | /* Put all the overlays we want in a vector in overlay_vec. | |
4189 | Store the length in len. */ | |
4190 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
145582a0 | 4191 | NULL, NULL); |
74514898 RS |
4192 | |
4193 | /* Make a list of them all. */ | |
4194 | result = Flist (noverlays, overlay_vec); | |
4195 | ||
4196 | xfree (overlay_vec); | |
4197 | return result; | |
4198 | } | |
4199 | ||
a7ca3326 | 4200 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 4201 | 1, 1, 0, |
7ee72033 | 4202 | doc: /* Return the next position after POS where an overlay starts or ends. |
624d2678 RS |
4203 | If there are no overlay boundaries from POS to (point-max), |
4204 | the value is (point-max). */) | |
5842a27b | 4205 | (Lisp_Object pos) |
2eec3b4e | 4206 | { |
b081724f | 4207 | ptrdiff_t i, len, noverlays; |
d311d28c | 4208 | ptrdiff_t endpos; |
2eec3b4e | 4209 | Lisp_Object *overlay_vec; |
2eec3b4e | 4210 | |
b7826503 | 4211 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
4212 | |
4213 | len = 10; | |
38182d90 | 4214 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
2eec3b4e RS |
4215 | |
4216 | /* Put all the overlays we want in a vector in overlay_vec. | |
4217 | Store the length in len. | |
4218 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 4219 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 4220 | &endpos, 0, 1); |
2eec3b4e RS |
4221 | |
4222 | /* If any of these overlays ends before endpos, | |
4223 | use its ending point instead. */ | |
4224 | for (i = 0; i < noverlays; i++) | |
4225 | { | |
4226 | Lisp_Object oend; | |
d311d28c | 4227 | ptrdiff_t oendpos; |
2eec3b4e RS |
4228 | |
4229 | oend = OVERLAY_END (overlay_vec[i]); | |
4230 | oendpos = OVERLAY_POSITION (oend); | |
4231 | if (oendpos < endpos) | |
4232 | endpos = oendpos; | |
1ab256cb RM |
4233 | } |
4234 | ||
9ac0d9e0 | 4235 | xfree (overlay_vec); |
2eec3b4e RS |
4236 | return make_number (endpos); |
4237 | } | |
239c932b | 4238 | |
a7ca3326 | 4239 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, |
239c932b | 4240 | Sprevious_overlay_change, 1, 1, 0, |
7ee72033 | 4241 | doc: /* Return the previous position before POS where an overlay starts or ends. |
624d2678 RS |
4242 | If there are no overlay boundaries from (point-min) to POS, |
4243 | the value is (point-min). */) | |
5842a27b | 4244 | (Lisp_Object pos) |
239c932b | 4245 | { |
d311d28c | 4246 | ptrdiff_t prevpos; |
239c932b | 4247 | Lisp_Object *overlay_vec; |
b081724f | 4248 | ptrdiff_t len; |
239c932b | 4249 | |
b7826503 | 4250 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 4251 | |
624bbdc4 RS |
4252 | /* At beginning of buffer, we know the answer; |
4253 | avoid bug subtracting 1 below. */ | |
4254 | if (XINT (pos) == BEGV) | |
4255 | return pos; | |
4256 | ||
017f0539 | 4257 | len = 10; |
38182d90 | 4258 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
017f0539 | 4259 | |
239c932b RS |
4260 | /* Put all the overlays we want in a vector in overlay_vec. |
4261 | Store the length in len. | |
daa1c109 | 4262 | prevpos gets the position of the previous change. */ |
328ab8e7 | 4263 | overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 4264 | 0, &prevpos, 1); |
239c932b | 4265 | |
239c932b RS |
4266 | xfree (overlay_vec); |
4267 | return make_number (prevpos); | |
4268 | } | |
2eec3b4e RS |
4269 | \f |
4270 | /* These functions are for debugging overlays. */ | |
4271 | ||
4272 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4273 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4274 | The car has all the overlays before the overlay center; |
4275 | the cdr has all the overlays after the overlay center. | |
4276 | Recentering overlays moves overlays between these lists. | |
4277 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 | 4278 | However, the overlays you get are the real objects that the buffer uses. */) |
5842a27b | 4279 | (void) |
2eec3b4e | 4280 | { |
2410d73a SM |
4281 | struct Lisp_Overlay *ol; |
4282 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4cb3e6b3 | 4283 | |
fd318b54 | 4284 | for (ol = current_buffer->overlays_before; ol; ol = ol->next) |
2410d73a SM |
4285 | { |
4286 | XSETMISC (tmp, ol); | |
4287 | before = Fcons (tmp, before); | |
4288 | } | |
fd318b54 | 4289 | for (ol = current_buffer->overlays_after; ol; ol = ol->next) |
2410d73a SM |
4290 | { |
4291 | XSETMISC (tmp, ol); | |
4292 | after = Fcons (tmp, after); | |
4293 | } | |
4cb3e6b3 | 4294 | |
2410d73a | 4295 | return Fcons (Fnreverse (before), Fnreverse (after)); |
2eec3b4e RS |
4296 | } |
4297 | ||
4298 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4299 | doc: /* Recenter the overlays of the current buffer around position POS. |
4300 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4301 | for positions far away from POS). */) | |
5842a27b | 4302 | (Lisp_Object pos) |
2eec3b4e | 4303 | { |
d311d28c | 4304 | ptrdiff_t p; |
b7826503 | 4305 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4306 | |
d311d28c PE |
4307 | p = clip_to_bounds (PTRDIFF_MIN, XINT (pos), PTRDIFF_MAX); |
4308 | recenter_overlay_lists (current_buffer, p); | |
2eec3b4e RS |
4309 | return Qnil; |
4310 | } | |
4311 | \f | |
a7ca3326 | 4312 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, |
7ee72033 | 4313 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
5842a27b | 4314 | (Lisp_Object overlay, Lisp_Object prop) |
2eec3b4e | 4315 | { |
b7826503 | 4316 | CHECK_OVERLAY (overlay); |
c644523b | 4317 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
4318 | } |
4319 | ||
4320 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7c301272 LMI |
4321 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. |
4322 | VALUE will be returned.*/) | |
5842a27b | 4323 | (Lisp_Object overlay, Lisp_Object prop, Lisp_Object value) |
2eec3b4e | 4324 | { |
48e2e3ba | 4325 | Lisp_Object tail, buffer; |
37ef52bb | 4326 | bool changed; |
2eec3b4e | 4327 | |
b7826503 | 4328 | CHECK_OVERLAY (overlay); |
b61982dd | 4329 | |
274a9425 RS |
4330 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4331 | ||
c644523b | 4332 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
4333 | CONSP (tail) && CONSP (XCDR (tail)); |
4334 | tail = XCDR (XCDR (tail))) | |
4335 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 4336 | { |
7539e11f | 4337 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 4338 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 4339 | goto found; |
274a9425 | 4340 | } |
9d7608b7 KH |
4341 | /* It wasn't in the list, so add it to the front. */ |
4342 | changed = !NILP (value); | |
c644523b DA |
4343 | set_overlay_plist |
4344 | (overlay, Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist))); | |
9d7608b7 KH |
4345 | found: |
4346 | if (! NILP (buffer)) | |
4347 | { | |
4348 | if (changed) | |
876aa27c | 4349 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
4350 | marker_position (OVERLAY_START (overlay)), |
4351 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
4352 | if (EQ (prop, Qevaporate) && ! NILP (value) |
4353 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
4354 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
4355 | Fdelete_overlay (overlay); | |
4356 | } | |
7d63db98 | 4357 | |
2eec3b4e | 4358 | return value; |
1ab256cb RM |
4359 | } |
4360 | \f | |
9115729e KH |
4361 | /* Subroutine of report_overlay_modification. */ |
4362 | ||
4363 | /* Lisp vector holding overlay hook functions to call. | |
4364 | Vector elements come in pairs. | |
4365 | Each even-index element is a list of hook functions. | |
4366 | The following odd-index element is the overlay they came from. | |
4367 | ||
4368 | Before the buffer change, we fill in this vector | |
4369 | as we call overlay hook functions. | |
4370 | After the buffer change, we get the functions to call from this vector. | |
4371 | This way we always call the same functions before and after the change. */ | |
4372 | static Lisp_Object last_overlay_modification_hooks; | |
4373 | ||
4374 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
d311d28c | 4375 | static ptrdiff_t last_overlay_modification_hooks_used; |
9115729e KH |
4376 | |
4377 | /* Add one functionlist/overlay pair | |
4378 | to the end of last_overlay_modification_hooks. */ | |
4379 | ||
4380 | static void | |
d3da34e0 | 4381 | add_overlay_mod_hooklist (Lisp_Object functionlist, Lisp_Object overlay) |
9115729e | 4382 | { |
d311d28c | 4383 | ptrdiff_t oldsize = ASIZE (last_overlay_modification_hooks); |
9115729e | 4384 | |
d311d28c PE |
4385 | if (oldsize - 1 <= last_overlay_modification_hooks_used) |
4386 | last_overlay_modification_hooks = | |
4387 | larger_vector (last_overlay_modification_hooks, 2, -1); | |
3ae565b3 SM |
4388 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, |
4389 | functionlist); last_overlay_modification_hooks_used++; | |
4390 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, | |
4391 | overlay); last_overlay_modification_hooks_used++; | |
9115729e KH |
4392 | } |
4393 | \f | |
173f2a64 RS |
4394 | /* Run the modification-hooks of overlays that include |
4395 | any part of the text in START to END. | |
9115729e KH |
4396 | If this change is an insertion, also |
4397 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4398 | and the insert-after-hooks of overlay ending at START. |
4399 | ||
4400 | This is called both before and after the modification. | |
37ef52bb | 4401 | AFTER is true when we call after the modification. |
930a9140 | 4402 | |
9115729e KH |
4403 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4404 | When AFTER is nonzero, they are the start position, | |
4405 | the position after the inserted new text, | |
4406 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4407 | |
4408 | void | |
37ef52bb | 4409 | report_overlay_modification (Lisp_Object start, Lisp_Object end, bool after, |
d3da34e0 | 4410 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) |
173f2a64 | 4411 | { |
2410d73a SM |
4412 | Lisp_Object prop, overlay; |
4413 | struct Lisp_Overlay *tail; | |
37ef52bb PE |
4414 | /* True if this change is an insertion. */ |
4415 | bool insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4416 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4417 | |
4418 | overlay = Qnil; | |
2410d73a | 4419 | tail = NULL; |
9115729e | 4420 | |
27c6b98e SM |
4421 | /* We used to run the functions as soon as we found them and only register |
4422 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4423 | case. But running elisp code as we traverse the list of overlays is | |
4424 | painful because the list can be modified by the elisp code so we had to | |
4425 | copy at several places. We now simply do a read-only traversal that | |
4426 | only collects the functions to run and we run them afterwards. It's | |
4427 | simpler, especially since all the code was already there. -stef */ | |
4428 | ||
a615c6dc | 4429 | if (!after) |
173f2a64 | 4430 | { |
a615c6dc SM |
4431 | /* We are being called before a change. |
4432 | Scan the overlays to find the functions to call. */ | |
4433 | last_overlay_modification_hooks_used = 0; | |
fd318b54 | 4434 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
173f2a64 | 4435 | { |
d311d28c | 4436 | ptrdiff_t startpos, endpos; |
a615c6dc SM |
4437 | Lisp_Object ostart, oend; |
4438 | ||
2410d73a | 4439 | XSETMISC (overlay, tail); |
a615c6dc SM |
4440 | |
4441 | ostart = OVERLAY_START (overlay); | |
4442 | oend = OVERLAY_END (overlay); | |
4443 | endpos = OVERLAY_POSITION (oend); | |
4444 | if (XFASTINT (start) > endpos) | |
4445 | break; | |
4446 | startpos = OVERLAY_POSITION (ostart); | |
4447 | if (insertion && (XFASTINT (start) == startpos | |
4448 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4449 | { |
a615c6dc SM |
4450 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4451 | if (!NILP (prop)) | |
4452 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4453 | } |
a615c6dc SM |
4454 | if (insertion && (XFASTINT (start) == endpos |
4455 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4456 | { |
a615c6dc SM |
4457 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4458 | if (!NILP (prop)) | |
4459 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4460 | } |
a615c6dc SM |
4461 | /* Test for intersecting intervals. This does the right thing |
4462 | for both insertion and deletion. */ | |
4463 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4464 | { |
a615c6dc SM |
4465 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4466 | if (!NILP (prop)) | |
4467 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4468 | } |
173f2a64 | 4469 | } |
60ebfdf3 | 4470 | |
fd318b54 | 4471 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
173f2a64 | 4472 | { |
d311d28c | 4473 | ptrdiff_t startpos, endpos; |
a615c6dc SM |
4474 | Lisp_Object ostart, oend; |
4475 | ||
2410d73a | 4476 | XSETMISC (overlay, tail); |
a615c6dc SM |
4477 | |
4478 | ostart = OVERLAY_START (overlay); | |
4479 | oend = OVERLAY_END (overlay); | |
4480 | startpos = OVERLAY_POSITION (ostart); | |
4481 | endpos = OVERLAY_POSITION (oend); | |
4482 | if (XFASTINT (end) < startpos) | |
4483 | break; | |
4484 | if (insertion && (XFASTINT (start) == startpos | |
4485 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4486 | { |
a615c6dc SM |
4487 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4488 | if (!NILP (prop)) | |
4489 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4490 | } |
a615c6dc SM |
4491 | if (insertion && (XFASTINT (start) == endpos |
4492 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4493 | { |
a615c6dc SM |
4494 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4495 | if (!NILP (prop)) | |
4496 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4497 | } |
a615c6dc SM |
4498 | /* Test for intersecting intervals. This does the right thing |
4499 | for both insertion and deletion. */ | |
4500 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4501 | { |
a615c6dc SM |
4502 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4503 | if (!NILP (prop)) | |
4504 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4505 | } |
173f2a64 RS |
4506 | } |
4507 | } | |
55b48893 | 4508 | |
a615c6dc SM |
4509 | GCPRO4 (overlay, arg1, arg2, arg3); |
4510 | { | |
4511 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4512 | First copy the vector contents, in case some of these hooks | |
4513 | do subsequent modification of the buffer. */ | |
d311d28c | 4514 | ptrdiff_t size = last_overlay_modification_hooks_used; |
38182d90 | 4515 | Lisp_Object *copy = alloca (size * sizeof *copy); |
d311d28c | 4516 | ptrdiff_t i; |
a615c6dc | 4517 | |
72af86bd | 4518 | memcpy (copy, XVECTOR (last_overlay_modification_hooks)->contents, |
663e2b3f | 4519 | size * word_size); |
a615c6dc SM |
4520 | gcpro1.var = copy; |
4521 | gcpro1.nvars = size; | |
4522 | ||
4523 | for (i = 0; i < size;) | |
4524 | { | |
8f54f30a PE |
4525 | Lisp_Object prop_i, overlay_i; |
4526 | prop_i = copy[i++]; | |
4527 | overlay_i = copy[i++]; | |
4528 | call_overlay_mod_hooks (prop_i, overlay_i, after, arg1, arg2, arg3); | |
a615c6dc SM |
4529 | } |
4530 | } | |
55b48893 | 4531 | UNGCPRO; |
173f2a64 RS |
4532 | } |
4533 | ||
4534 | static void | |
37ef52bb | 4535 | call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, bool after, |
d3da34e0 | 4536 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) |
173f2a64 | 4537 | { |
930a9140 | 4538 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4539 | |
930a9140 | 4540 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4541 | |
6d70a280 | 4542 | while (CONSP (list)) |
173f2a64 | 4543 | { |
930a9140 | 4544 | if (NILP (arg3)) |
6d70a280 | 4545 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4546 | else |
6d70a280 SM |
4547 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4548 | list = XCDR (list); | |
173f2a64 RS |
4549 | } |
4550 | UNGCPRO; | |
4551 | } | |
9d7608b7 KH |
4552 | |
4553 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4554 | property is set. */ | |
4555 | void | |
d311d28c | 4556 | evaporate_overlays (ptrdiff_t pos) |
9d7608b7 | 4557 | { |
2410d73a SM |
4558 | Lisp_Object overlay, hit_list; |
4559 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4560 | |
4561 | hit_list = Qnil; | |
c2d5b10f | 4562 | if (pos <= current_buffer->overlay_center) |
fd318b54 | 4563 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
9d7608b7 | 4564 | { |
d311d28c | 4565 | ptrdiff_t endpos; |
2410d73a | 4566 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4567 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4568 | if (endpos < pos) | |
4569 | break; | |
4570 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4571 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4572 | hit_list = Fcons (overlay, hit_list); |
4573 | } | |
4574 | else | |
fd318b54 | 4575 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
9d7608b7 | 4576 | { |
d311d28c | 4577 | ptrdiff_t startpos; |
2410d73a | 4578 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4579 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4580 | if (startpos > pos) | |
4581 | break; | |
4582 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4583 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4584 | hit_list = Fcons (overlay, hit_list); |
4585 | } | |
7539e11f KR |
4586 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4587 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4588 | } |
1bf08baf | 4589 | |
b86af064 GM |
4590 | /*********************************************************************** |
4591 | Allocation with mmap | |
4592 | ***********************************************************************/ | |
4593 | ||
4594 | #ifdef USE_MMAP_FOR_BUFFERS | |
4595 | ||
4596 | #include <sys/types.h> | |
4597 | #include <sys/mman.h> | |
4598 | ||
4599 | #ifndef MAP_ANON | |
4600 | #ifdef MAP_ANONYMOUS | |
4601 | #define MAP_ANON MAP_ANONYMOUS | |
4602 | #else | |
4603 | #define MAP_ANON 0 | |
4604 | #endif | |
4605 | #endif | |
4606 | ||
09dfdf85 GM |
4607 | #ifndef MAP_FAILED |
4608 | #define MAP_FAILED ((void *) -1) | |
4609 | #endif | |
4610 | ||
b86af064 | 4611 | #include <stdio.h> |
b86af064 GM |
4612 | |
4613 | #if MAP_ANON == 0 | |
4614 | #include <fcntl.h> | |
4615 | #endif | |
4616 | ||
4617 | #include "coding.h" | |
4618 | ||
4619 | ||
4620 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4621 | The current implementation lets the system select mapped | |
4622 | addresses; we're not using MAP_FIXED in general, except when | |
4623 | trying to enlarge regions. | |
4624 | ||
4625 | Each mapped region starts with a mmap_region structure, the user | |
4626 | area starts after that structure, aligned to MEM_ALIGN. | |
4627 | ||
4628 | +-----------------------+ | |
4629 | | struct mmap_info + | | |
4630 | | padding | | |
4631 | +-----------------------+ | |
4632 | | user data | | |
4633 | | | | |
4634 | | | | |
4635 | +-----------------------+ */ | |
4636 | ||
4637 | struct mmap_region | |
4638 | { | |
4639 | /* User-specified size. */ | |
4640 | size_t nbytes_specified; | |
177c0ea7 | 4641 | |
b86af064 GM |
4642 | /* Number of bytes mapped */ |
4643 | size_t nbytes_mapped; | |
4644 | ||
4645 | /* Pointer to the location holding the address of the memory | |
4646 | allocated with the mmap'd block. The variable actually points | |
4647 | after this structure. */ | |
261cb4bb | 4648 | void **var; |
b86af064 GM |
4649 | |
4650 | /* Next and previous in list of all mmap'd regions. */ | |
4651 | struct mmap_region *next, *prev; | |
4652 | }; | |
4653 | ||
4654 | /* Doubly-linked list of mmap'd regions. */ | |
4655 | ||
4656 | static struct mmap_region *mmap_regions; | |
4657 | ||
4658 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4659 | /dev/zero will be opened on it. */ | |
4660 | ||
4661 | static int mmap_fd; | |
4662 | ||
4663 | /* Temporary storage for mmap_set_vars, see there. */ | |
4664 | ||
4665 | static struct mmap_region *mmap_regions_1; | |
4666 | static int mmap_fd_1; | |
4667 | ||
4668 | /* Page size on this system. */ | |
4669 | ||
4670 | static int mmap_page_size; | |
4671 | ||
cd1181db | 4672 | /* 1 means mmap has been initialized. */ |
b86af064 | 4673 | |
37ef52bb | 4674 | static bool mmap_initialized_p; |
b86af064 GM |
4675 | |
4676 | /* Value is X rounded up to the next multiple of N. */ | |
4677 | ||
4678 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4679 | ||
4680 | /* Size of mmap_region structure plus padding. */ | |
4681 | ||
4682 | #define MMAP_REGION_STRUCT_SIZE \ | |
4683 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4684 | ||
4685 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4686 | region, return a pointer to the start of the region. */ | |
4687 | ||
4688 | #define MMAP_REGION(P) \ | |
4689 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4690 | ||
4691 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4692 | to the start of the user-visible part of the region. */ | |
4693 | ||
4694 | #define MMAP_USER_AREA(P) \ | |
261cb4bb | 4695 | ((void *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) |
b86af064 GM |
4696 | |
4697 | #define MEM_ALIGN sizeof (double) | |
4698 | ||
7273faa1 DL |
4699 | /* Predicate returning true if part of the address range [START .. END] |
4700 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4701 | memory mapping. |
4702 | ||
da6062e6 | 4703 | Default is to conservatively assume the address range is occupied by |
08327b22 GM |
4704 | something else. This can be overridden by system configuration |
4705 | files if system-specific means to determine this exists. */ | |
4706 | ||
4707 | #ifndef MMAP_ALLOCATED_P | |
4708 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4709 | #endif | |
4710 | ||
53964682 | 4711 | /* Perform necessary initializations for the use of mmap. */ |
b86af064 | 4712 | |
1dae0f0a AS |
4713 | static void |
4714 | mmap_init (void) | |
4715 | { | |
4716 | #if MAP_ANON == 0 | |
4717 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4718 | in a dumped Emacs. */ | |
4719 | if (mmap_fd <= 0) | |
4720 | { | |
4721 | /* No anonymous mmap -- we need the file descriptor. */ | |
4722 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4723 | if (mmap_fd == -1) | |
4724 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4725 | } | |
4726 | #endif /* MAP_ANON == 0 */ | |
4727 | ||
4728 | if (mmap_initialized_p) | |
4729 | return; | |
4730 | mmap_initialized_p = 1; | |
b86af064 | 4731 | |
1dae0f0a AS |
4732 | #if MAP_ANON != 0 |
4733 | mmap_fd = -1; | |
4734 | #endif | |
4735 | ||
4736 | mmap_page_size = getpagesize (); | |
4737 | } | |
b86af064 GM |
4738 | |
4739 | /* Return a region overlapping address range START...END, or null if | |
4740 | none. END is not including, i.e. the last byte in the range | |
4741 | is at END - 1. */ | |
4742 | ||
4743 | static struct mmap_region * | |
261cb4bb | 4744 | mmap_find (void *start, void *end) |
b86af064 GM |
4745 | { |
4746 | struct mmap_region *r; | |
4747 | char *s = (char *) start, *e = (char *) end; | |
177c0ea7 | 4748 | |
b86af064 GM |
4749 | for (r = mmap_regions; r; r = r->next) |
4750 | { | |
4751 | char *rstart = (char *) r; | |
4752 | char *rend = rstart + r->nbytes_mapped; | |
4753 | ||
4754 | if (/* First byte of range, i.e. START, in this region? */ | |
4755 | (s >= rstart && s < rend) | |
4756 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4757 | || (e > rstart && e <= rend) | |
4758 | /* First byte of this region in the range? */ | |
4759 | || (rstart >= s && rstart < e) | |
4760 | /* Last byte of this region in the range? */ | |
4761 | || (rend > s && rend <= e)) | |
4762 | break; | |
4763 | } | |
4764 | ||
4765 | return r; | |
4766 | } | |
4767 | ||
4768 | ||
4769 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
37ef52bb | 4770 | the region. */ |
b86af064 | 4771 | |
37ef52bb | 4772 | static void |
1dae0f0a | 4773 | mmap_free_1 (struct mmap_region *r) |
b86af064 GM |
4774 | { |
4775 | if (r->next) | |
4776 | r->next->prev = r->prev; | |
4777 | if (r->prev) | |
4778 | r->prev->next = r->next; | |
4779 | else | |
4780 | mmap_regions = r->next; | |
177c0ea7 | 4781 | |
261cb4bb | 4782 | if (munmap (r, r->nbytes_mapped) == -1) |
37ef52bb | 4783 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); |
b86af064 GM |
4784 | } |
4785 | ||
4786 | ||
4787 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
37ef52bb | 4788 | Value is true if successful. */ |
b86af064 | 4789 | |
37ef52bb | 4790 | static bool |
1dae0f0a | 4791 | mmap_enlarge (struct mmap_region *r, int npages) |
b86af064 GM |
4792 | { |
4793 | char *region_end = (char *) r + r->nbytes_mapped; | |
4794 | size_t nbytes; | |
37ef52bb | 4795 | bool success = 0; |
b86af064 GM |
4796 | |
4797 | if (npages < 0) | |
4798 | { | |
4799 | /* Unmap pages at the end of the region. */ | |
4800 | nbytes = - npages * mmap_page_size; | |
4801 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4802 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4803 | else | |
4804 | { | |
4805 | r->nbytes_mapped -= nbytes; | |
4806 | success = 1; | |
4807 | } | |
4808 | } | |
4809 | else if (npages > 0) | |
4810 | { | |
b86af064 | 4811 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4812 | |
b86af064 GM |
4813 | /* Try to map additional pages at the end of the region. We |
4814 | cannot do this if the address range is already occupied by | |
4815 | something else because mmap deletes any previous mapping. | |
4816 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4817 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 | 4818 | { |
261cb4bb | 4819 | void *p; |
177c0ea7 | 4820 | |
b86af064 GM |
4821 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4822 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4823 | if (p == MAP_FAILED) | |
edaa9aed | 4824 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
261cb4bb | 4825 | else if (p != region_end) |
b86af064 GM |
4826 | { |
4827 | /* Kernels are free to choose a different address. In | |
4828 | that case, unmap what we've mapped above; we have | |
4829 | no use for it. */ | |
4830 | if (munmap (p, nbytes) == -1) | |
4831 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4832 | } | |
4833 | else | |
4834 | { | |
4835 | r->nbytes_mapped += nbytes; | |
4836 | success = 1; | |
4837 | } | |
4838 | } | |
4839 | } | |
4840 | ||
4841 | return success; | |
4842 | } | |
4843 | ||
4844 | ||
37ef52bb PE |
4845 | /* Set or reset variables holding references to mapped regions. |
4846 | If not RESTORE_P, set all variables to null. If RESTORE_P, set all | |
4847 | variables to the start of the user-areas of mapped regions. | |
b86af064 GM |
4848 | |
4849 | This function is called from Fdump_emacs to ensure that the dumped | |
4850 | Emacs doesn't contain references to memory that won't be mapped | |
4851 | when Emacs starts. */ | |
4852 | ||
4853 | void | |
37ef52bb | 4854 | mmap_set_vars (bool restore_p) |
b86af064 GM |
4855 | { |
4856 | struct mmap_region *r; | |
4857 | ||
4858 | if (restore_p) | |
4859 | { | |
4860 | mmap_regions = mmap_regions_1; | |
4861 | mmap_fd = mmap_fd_1; | |
4862 | for (r = mmap_regions; r; r = r->next) | |
4863 | *r->var = MMAP_USER_AREA (r); | |
4864 | } | |
4865 | else | |
4866 | { | |
4867 | for (r = mmap_regions; r; r = r->next) | |
4868 | *r->var = NULL; | |
4869 | mmap_regions_1 = mmap_regions; | |
4870 | mmap_regions = NULL; | |
4871 | mmap_fd_1 = mmap_fd; | |
4872 | mmap_fd = -1; | |
4873 | } | |
4874 | } | |
4875 | ||
4876 | ||
4877 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4878 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4879 | address of some variable which will use the data area. | |
4880 | ||
4881 | The allocation of 0 bytes is valid. | |
4882 | ||
4883 | If we can't allocate the necessary memory, set *VAR to null, and | |
4884 | return null. */ | |
4885 | ||
261cb4bb PE |
4886 | static void * |
4887 | mmap_alloc (void **var, size_t nbytes) | |
b86af064 GM |
4888 | { |
4889 | void *p; | |
4890 | size_t map; | |
4891 | ||
4892 | mmap_init (); | |
4893 | ||
4894 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4895 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4896 | mmap_fd, 0); | |
177c0ea7 | 4897 | |
b86af064 GM |
4898 | if (p == MAP_FAILED) |
4899 | { | |
4900 | if (errno != ENOMEM) | |
4901 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4902 | p = NULL; | |
4903 | } | |
4904 | else | |
4905 | { | |
4906 | struct mmap_region *r = (struct mmap_region *) p; | |
177c0ea7 | 4907 | |
b86af064 GM |
4908 | r->nbytes_specified = nbytes; |
4909 | r->nbytes_mapped = map; | |
4910 | r->var = var; | |
4911 | r->prev = NULL; | |
4912 | r->next = mmap_regions; | |
4913 | if (r->next) | |
4914 | r->next->prev = r; | |
4915 | mmap_regions = r; | |
177c0ea7 | 4916 | |
b86af064 GM |
4917 | p = MMAP_USER_AREA (p); |
4918 | } | |
177c0ea7 | 4919 | |
b86af064 GM |
4920 | return *var = p; |
4921 | } | |
4922 | ||
4923 | ||
1dae0f0a AS |
4924 | /* Free a block of relocatable storage whose data is pointed to by |
4925 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4926 | ||
4927 | static void | |
261cb4bb | 4928 | mmap_free (void **var) |
1dae0f0a AS |
4929 | { |
4930 | mmap_init (); | |
4931 | ||
4932 | if (*var) | |
4933 | { | |
4934 | mmap_free_1 (MMAP_REGION (*var)); | |
4935 | *var = NULL; | |
4936 | } | |
4937 | } | |
4938 | ||
4939 | ||
b86af064 GM |
4940 | /* Given a pointer at address VAR to data allocated with mmap_alloc, |
4941 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4942 | and return this value. If more memory cannot be allocated, then | |
4943 | leave *VAR unchanged, and return null. */ | |
4944 | ||
261cb4bb PE |
4945 | static void * |
4946 | mmap_realloc (void **var, size_t nbytes) | |
b86af064 | 4947 | { |
261cb4bb | 4948 | void *result; |
177c0ea7 | 4949 | |
b86af064 GM |
4950 | mmap_init (); |
4951 | ||
4952 | if (*var == NULL) | |
4953 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4954 | else if (nbytes == 0) |
b86af064 GM |
4955 | { |
4956 | mmap_free (var); | |
4957 | result = mmap_alloc (var, nbytes); | |
4958 | } | |
4959 | else | |
4960 | { | |
4961 | struct mmap_region *r = MMAP_REGION (*var); | |
4962 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4963 | |
b86af064 GM |
4964 | if (room < nbytes) |
4965 | { | |
4966 | /* Must enlarge. */ | |
261cb4bb | 4967 | void *old_ptr = *var; |
b86af064 GM |
4968 | |
4969 | /* Try to map additional pages at the end of the region. | |
4970 | If that fails, allocate a new region, copy data | |
4971 | from the old region, then free it. */ | |
4972 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4973 | / mmap_page_size))) | |
4974 | { | |
4975 | r->nbytes_specified = nbytes; | |
4976 | *var = result = old_ptr; | |
4977 | } | |
4978 | else if (mmap_alloc (var, nbytes)) | |
4979 | { | |
72af86bd | 4980 | memcpy (*var, old_ptr, r->nbytes_specified); |
b86af064 GM |
4981 | mmap_free_1 (MMAP_REGION (old_ptr)); |
4982 | result = *var; | |
4983 | r = MMAP_REGION (result); | |
4984 | r->nbytes_specified = nbytes; | |
4985 | } | |
4986 | else | |
4987 | { | |
4988 | *var = old_ptr; | |
4989 | result = NULL; | |
4990 | } | |
4991 | } | |
4992 | else if (room - nbytes >= mmap_page_size) | |
4993 | { | |
4994 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4995 | memory back to the system. |
4996 | ||
4997 | The extra parens are to make the division happens first, | |
4998 | on positive values, so we know it will round towards | |
4999 | zero. */ | |
bb63c5c9 | 5000 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
5001 | result = *var; |
5002 | r->nbytes_specified = nbytes; | |
5003 | } | |
5004 | else | |
5005 | { | |
5006 | /* Leave it alone. */ | |
5007 | result = *var; | |
5008 | r->nbytes_specified = nbytes; | |
5009 | } | |
5010 | } | |
5011 | ||
5012 | return result; | |
5013 | } | |
5014 | ||
5015 | ||
b86af064 GM |
5016 | #endif /* USE_MMAP_FOR_BUFFERS */ |
5017 | ||
5018 | ||
5019 | \f | |
5020 | /*********************************************************************** | |
5021 | Buffer-text Allocation | |
5022 | ***********************************************************************/ | |
5023 | ||
b86af064 GM |
5024 | /* Allocate NBYTES bytes for buffer B's text buffer. */ |
5025 | ||
5026 | static void | |
fd05c7e9 | 5027 | alloc_buffer_text (struct buffer *b, ptrdiff_t nbytes) |
b86af064 | 5028 | { |
261cb4bb | 5029 | void *p; |
177c0ea7 | 5030 | |
4d7e6e51 | 5031 | block_input (); |
b86af064 | 5032 | #if defined USE_MMAP_FOR_BUFFERS |
261cb4bb | 5033 | p = mmap_alloc ((void **) &b->text->beg, nbytes); |
b86af064 | 5034 | #elif defined REL_ALLOC |
261cb4bb | 5035 | p = r_alloc ((void **) &b->text->beg, nbytes); |
b86af064 | 5036 | #else |
815add84 | 5037 | p = xmalloc (nbytes); |
b86af064 | 5038 | #endif |
177c0ea7 | 5039 | |
b86af064 GM |
5040 | if (p == NULL) |
5041 | { | |
4d7e6e51 | 5042 | unblock_input (); |
531b0165 | 5043 | memory_full (nbytes); |
b86af064 GM |
5044 | } |
5045 | ||
5046 | b->text->beg = (unsigned char *) p; | |
4d7e6e51 | 5047 | unblock_input (); |
b86af064 GM |
5048 | } |
5049 | ||
5050 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
5051 | shrink it. */ | |
5052 | ||
5053 | void | |
d311d28c | 5054 | enlarge_buffer_text (struct buffer *b, ptrdiff_t delta) |
b86af064 | 5055 | { |
261cb4bb | 5056 | void *p; |
fd05c7e9 PE |
5057 | ptrdiff_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 |
5058 | + delta); | |
4d7e6e51 | 5059 | block_input (); |
b86af064 | 5060 | #if defined USE_MMAP_FOR_BUFFERS |
261cb4bb | 5061 | p = mmap_realloc ((void **) &b->text->beg, nbytes); |
b86af064 | 5062 | #elif defined REL_ALLOC |
261cb4bb | 5063 | p = r_re_alloc ((void **) &b->text->beg, nbytes); |
b86af064 GM |
5064 | #else |
5065 | p = xrealloc (b->text->beg, nbytes); | |
5066 | #endif | |
177c0ea7 | 5067 | |
b86af064 GM |
5068 | if (p == NULL) |
5069 | { | |
4d7e6e51 | 5070 | unblock_input (); |
531b0165 | 5071 | memory_full (nbytes); |
b86af064 GM |
5072 | } |
5073 | ||
5074 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
4d7e6e51 | 5075 | unblock_input (); |
b86af064 GM |
5076 | } |
5077 | ||
5078 | ||
5079 | /* Free buffer B's text buffer. */ | |
5080 | ||
5081 | static void | |
d3da34e0 | 5082 | free_buffer_text (struct buffer *b) |
b86af064 | 5083 | { |
4d7e6e51 | 5084 | block_input (); |
b86af064 GM |
5085 | |
5086 | #if defined USE_MMAP_FOR_BUFFERS | |
261cb4bb | 5087 | mmap_free ((void **) &b->text->beg); |
b86af064 | 5088 | #elif defined REL_ALLOC |
261cb4bb | 5089 | r_alloc_free ((void **) &b->text->beg); |
b86af064 GM |
5090 | #else |
5091 | xfree (b->text->beg); | |
5092 | #endif | |
177c0ea7 | 5093 | |
b86af064 | 5094 | BUF_BEG_ADDR (b) = NULL; |
4d7e6e51 | 5095 | unblock_input (); |
b86af064 GM |
5096 | } |
5097 | ||
5098 | ||
5099 | \f | |
5100 | /*********************************************************************** | |
5101 | Initialization | |
5102 | ***********************************************************************/ | |
5103 | ||
dfcf069d | 5104 | void |
d3da34e0 | 5105 | init_buffer_once (void) |
1ab256cb | 5106 | { |
7c02e886 GM |
5107 | int idx; |
5108 | ||
72af86bd | 5109 | memset (buffer_permanent_local_flags, 0, sizeof buffer_permanent_local_flags); |
13de9290 | 5110 | |
1ab256cb RM |
5111 | /* Make sure all markable slots in buffer_defaults |
5112 | are initialized reasonably, so mark_buffer won't choke. */ | |
5113 | reset_buffer (&buffer_defaults); | |
4b4deea2 | 5114 | eassert (EQ (BVAR (&buffer_defaults, name), make_number (0))); |
13de9290 | 5115 | reset_buffer_local_variables (&buffer_defaults, 1); |
4b4deea2 | 5116 | eassert (EQ (BVAR (&buffer_local_symbols, name), make_number (0))); |
1ab256cb | 5117 | reset_buffer (&buffer_local_symbols); |
13de9290 | 5118 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
5119 | /* Prevent GC from getting confused. */ |
5120 | buffer_defaults.text = &buffer_defaults.own_text; | |
5121 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
04e9897c DA |
5122 | /* No one will share the text with these buffers, but let's play it safe. */ |
5123 | buffer_defaults.indirections = 0; | |
5124 | buffer_local_symbols.indirections = 0; | |
98a07056 DA |
5125 | /* Likewise no one will display them. */ |
5126 | buffer_defaults.window_count = 0; | |
5127 | buffer_local_symbols.window_count = 0; | |
0c94c8d6 PE |
5128 | set_buffer_intervals (&buffer_defaults, NULL); |
5129 | set_buffer_intervals (&buffer_local_symbols, NULL); | |
c752cfa9 DA |
5130 | /* This is not strictly necessary, but let's make them initialized. */ |
5131 | bset_name (&buffer_defaults, build_pure_c_string (" *buffer-defaults*")); | |
5132 | bset_name (&buffer_local_symbols, build_pure_c_string (" *buffer-local-symbols*")); | |
914adc42 DA |
5133 | BUFFER_PVEC_INIT (&buffer_defaults); |
5134 | BUFFER_PVEC_INIT (&buffer_local_symbols); | |
1ab256cb RM |
5135 | |
5136 | /* Set up the default values of various buffer slots. */ | |
5137 | /* Must do these before making the first buffer! */ | |
5138 | ||
f532dca0 | 5139 | /* real setup is done in bindings.el */ |
39eb03f1 PE |
5140 | bset_mode_line_format (&buffer_defaults, build_pure_c_string ("%-")); |
5141 | bset_header_line_format (&buffer_defaults, Qnil); | |
5142 | bset_abbrev_mode (&buffer_defaults, Qnil); | |
5143 | bset_overwrite_mode (&buffer_defaults, Qnil); | |
5144 | bset_case_fold_search (&buffer_defaults, Qt); | |
5145 | bset_auto_fill_function (&buffer_defaults, Qnil); | |
5146 | bset_selective_display (&buffer_defaults, Qnil); | |
5147 | bset_selective_display_ellipses (&buffer_defaults, Qt); | |
5148 | bset_abbrev_table (&buffer_defaults, Qnil); | |
5149 | bset_display_table (&buffer_defaults, Qnil); | |
5150 | bset_undo_list (&buffer_defaults, Qnil); | |
5151 | bset_mark_active (&buffer_defaults, Qnil); | |
5152 | bset_file_format (&buffer_defaults, Qnil); | |
5153 | bset_auto_save_file_format (&buffer_defaults, Qt); | |
0c94c8d6 PE |
5154 | set_buffer_overlays_before (&buffer_defaults, NULL); |
5155 | set_buffer_overlays_after (&buffer_defaults, NULL); | |
c2d5b10f | 5156 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 5157 | |
4b4deea2 | 5158 | XSETFASTINT (BVAR (&buffer_defaults, tab_width), 8); |
39eb03f1 PE |
5159 | bset_truncate_lines (&buffer_defaults, Qnil); |
5160 | bset_word_wrap (&buffer_defaults, Qnil); | |
5161 | bset_ctl_arrow (&buffer_defaults, Qt); | |
5162 | bset_bidi_display_reordering (&buffer_defaults, Qt); | |
5163 | bset_bidi_paragraph_direction (&buffer_defaults, Qnil); | |
5164 | bset_cursor_type (&buffer_defaults, Qt); | |
5165 | bset_extra_line_spacing (&buffer_defaults, Qnil); | |
5166 | bset_cursor_in_non_selected_windows (&buffer_defaults, Qt); | |
5167 | ||
5168 | bset_enable_multibyte_characters (&buffer_defaults, Qt); | |
5169 | bset_buffer_file_coding_system (&buffer_defaults, Qnil); | |
4b4deea2 TT |
5170 | XSETFASTINT (BVAR (&buffer_defaults, fill_column), 70); |
5171 | XSETFASTINT (BVAR (&buffer_defaults, left_margin), 0); | |
39eb03f1 PE |
5172 | bset_cache_long_line_scans (&buffer_defaults, Qnil); |
5173 | bset_file_truename (&buffer_defaults, Qnil); | |
4b4deea2 TT |
5174 | XSETFASTINT (BVAR (&buffer_defaults, display_count), 0); |
5175 | XSETFASTINT (BVAR (&buffer_defaults, left_margin_cols), 0); | |
5176 | XSETFASTINT (BVAR (&buffer_defaults, right_margin_cols), 0); | |
39eb03f1 PE |
5177 | bset_left_fringe_width (&buffer_defaults, Qnil); |
5178 | bset_right_fringe_width (&buffer_defaults, Qnil); | |
5179 | bset_fringes_outside_margins (&buffer_defaults, Qnil); | |
5180 | bset_scroll_bar_width (&buffer_defaults, Qnil); | |
5181 | bset_vertical_scroll_bar_type (&buffer_defaults, Qt); | |
5182 | bset_indicate_empty_lines (&buffer_defaults, Qnil); | |
5183 | bset_indicate_buffer_boundaries (&buffer_defaults, Qnil); | |
5184 | bset_fringe_indicator_alist (&buffer_defaults, Qnil); | |
5185 | bset_fringe_cursor_alist (&buffer_defaults, Qnil); | |
5186 | bset_scroll_up_aggressively (&buffer_defaults, Qnil); | |
5187 | bset_scroll_down_aggressively (&buffer_defaults, Qnil); | |
5188 | bset_display_time (&buffer_defaults, Qnil); | |
1ab256cb RM |
5189 | |
5190 | /* Assign the local-flags to the slots that have default values. | |
5191 | The local flag is a bit that is used in the buffer | |
5192 | to say that it has its own local value for the slot. | |
5193 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
5194 | ||
5195 | /* Nothing can work if this isn't true */ | |
663e2b3f | 5196 | { verify (sizeof (EMACS_INT) == word_size); } |
1ab256cb RM |
5197 | |
5198 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
72af86bd | 5199 | memset (&buffer_local_flags, 0, sizeof buffer_local_flags); |
39eb03f1 PE |
5200 | bset_filename (&buffer_local_flags, make_number (-1)); |
5201 | bset_directory (&buffer_local_flags, make_number (-1)); | |
5202 | bset_backed_up (&buffer_local_flags, make_number (-1)); | |
5203 | bset_save_length (&buffer_local_flags, make_number (-1)); | |
5204 | bset_auto_save_file_name (&buffer_local_flags, make_number (-1)); | |
5205 | bset_read_only (&buffer_local_flags, make_number (-1)); | |
5206 | bset_major_mode (&buffer_local_flags, make_number (-1)); | |
5207 | bset_mode_name (&buffer_local_flags, make_number (-1)); | |
5208 | bset_undo_list (&buffer_local_flags, make_number (-1)); | |
5209 | bset_mark_active (&buffer_local_flags, make_number (-1)); | |
5210 | bset_point_before_scroll (&buffer_local_flags, make_number (-1)); | |
5211 | bset_file_truename (&buffer_local_flags, make_number (-1)); | |
5212 | bset_invisibility_spec (&buffer_local_flags, make_number (-1)); | |
5213 | bset_file_format (&buffer_local_flags, make_number (-1)); | |
5214 | bset_auto_save_file_format (&buffer_local_flags, make_number (-1)); | |
5215 | bset_display_count (&buffer_local_flags, make_number (-1)); | |
5216 | bset_display_time (&buffer_local_flags, make_number (-1)); | |
5217 | bset_enable_multibyte_characters (&buffer_local_flags, make_number (-1)); | |
8d7a4592 | 5218 | |
7c02e886 | 5219 | idx = 1; |
4b4deea2 TT |
5220 | XSETFASTINT (BVAR (&buffer_local_flags, mode_line_format), idx); ++idx; |
5221 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_mode), idx); ++idx; | |
5222 | XSETFASTINT (BVAR (&buffer_local_flags, overwrite_mode), idx); ++idx; | |
5223 | XSETFASTINT (BVAR (&buffer_local_flags, case_fold_search), idx); ++idx; | |
5224 | XSETFASTINT (BVAR (&buffer_local_flags, auto_fill_function), idx); ++idx; | |
5225 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display), idx); ++idx; | |
4b4deea2 | 5226 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display_ellipses), idx); ++idx; |
4b4deea2 TT |
5227 | XSETFASTINT (BVAR (&buffer_local_flags, tab_width), idx); ++idx; |
5228 | XSETFASTINT (BVAR (&buffer_local_flags, truncate_lines), idx); ++idx; | |
5229 | XSETFASTINT (BVAR (&buffer_local_flags, word_wrap), idx); ++idx; | |
5230 | XSETFASTINT (BVAR (&buffer_local_flags, ctl_arrow), idx); ++idx; | |
5231 | XSETFASTINT (BVAR (&buffer_local_flags, fill_column), idx); ++idx; | |
5232 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin), idx); ++idx; | |
5233 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_table), idx); ++idx; | |
5234 | XSETFASTINT (BVAR (&buffer_local_flags, display_table), idx); ++idx; | |
4b4deea2 TT |
5235 | XSETFASTINT (BVAR (&buffer_local_flags, syntax_table), idx); ++idx; |
5236 | XSETFASTINT (BVAR (&buffer_local_flags, cache_long_line_scans), idx); ++idx; | |
5237 | XSETFASTINT (BVAR (&buffer_local_flags, category_table), idx); ++idx; | |
5238 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_display_reordering), idx); ++idx; | |
5239 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_paragraph_direction), idx); ++idx; | |
5240 | XSETFASTINT (BVAR (&buffer_local_flags, buffer_file_coding_system), idx); | |
a1a17b61 | 5241 | /* Make this one a permanent local. */ |
7c02e886 | 5242 | buffer_permanent_local_flags[idx++] = 1; |
4b4deea2 TT |
5243 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin_cols), idx); ++idx; |
5244 | XSETFASTINT (BVAR (&buffer_local_flags, right_margin_cols), idx); ++idx; | |
5245 | XSETFASTINT (BVAR (&buffer_local_flags, left_fringe_width), idx); ++idx; | |
5246 | XSETFASTINT (BVAR (&buffer_local_flags, right_fringe_width), idx); ++idx; | |
5247 | XSETFASTINT (BVAR (&buffer_local_flags, fringes_outside_margins), idx); ++idx; | |
5248 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_bar_width), idx); ++idx; | |
5249 | XSETFASTINT (BVAR (&buffer_local_flags, vertical_scroll_bar_type), idx); ++idx; | |
5250 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_empty_lines), idx); ++idx; | |
5251 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_buffer_boundaries), idx); ++idx; | |
5252 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_indicator_alist), idx); ++idx; | |
5253 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_cursor_alist), idx); ++idx; | |
5254 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_up_aggressively), idx); ++idx; | |
5255 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_down_aggressively), idx); ++idx; | |
5256 | XSETFASTINT (BVAR (&buffer_local_flags, header_line_format), idx); ++idx; | |
5257 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_type), idx); ++idx; | |
5258 | XSETFASTINT (BVAR (&buffer_local_flags, extra_line_spacing), idx); ++idx; | |
5259 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_in_non_selected_windows), idx); ++idx; | |
7c02e886 GM |
5260 | |
5261 | /* Need more room? */ | |
7313acd0 | 5262 | if (idx >= MAX_PER_BUFFER_VARS) |
1088b922 | 5263 | emacs_abort (); |
7313acd0 | 5264 | last_per_buffer_idx = idx; |
177c0ea7 | 5265 | |
1ab256cb RM |
5266 | Vbuffer_alist = Qnil; |
5267 | current_buffer = 0; | |
5268 | all_buffers = 0; | |
5269 | ||
2a0213a6 | 5270 | QSFundamental = build_pure_c_string ("Fundamental"); |
1ab256cb | 5271 | |
d67b4f80 | 5272 | Qfundamental_mode = intern_c_string ("fundamental-mode"); |
39eb03f1 | 5273 | bset_major_mode (&buffer_defaults, Qfundamental_mode); |
1ab256cb | 5274 | |
d67b4f80 | 5275 | Qmode_class = intern_c_string ("mode-class"); |
1ab256cb | 5276 | |
d67b4f80 | 5277 | Qprotected_field = intern_c_string ("protected-field"); |
1ab256cb | 5278 | |
d67b4f80 | 5279 | Qpermanent_local = intern_c_string ("permanent-local"); |
1ab256cb | 5280 | |
d67b4f80 | 5281 | Qkill_buffer_hook = intern_c_string ("kill-buffer-hook"); |
fd6cfe11 | 5282 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5283 | |
1ab256cb | 5284 | /* super-magic invisible buffer */ |
2a0213a6 | 5285 | Vprin1_to_string_buffer = Fget_buffer_create (build_pure_c_string (" prin1")); |
1ab256cb RM |
5286 | Vbuffer_alist = Qnil; |
5287 | ||
2a0213a6 | 5288 | Fset_buffer (Fget_buffer_create (build_pure_c_string ("*scratch*"))); |
7775635d KH |
5289 | |
5290 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5291 | } |
5292 | ||
dfcf069d | 5293 | void |
d3da34e0 | 5294 | init_buffer (void) |
1ab256cb | 5295 | { |
2381d133 | 5296 | char *pwd; |
136351b7 | 5297 | Lisp_Object temp; |
965d34eb | 5298 | ptrdiff_t len; |
1ab256cb | 5299 | |
b86af064 | 5300 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5301 | { |
5302 | /* When using the ralloc implementation based on mmap(2), buffer | |
5303 | text pointers will have been set to null in the dumped Emacs. | |
5304 | Map new memory. */ | |
5305 | struct buffer *b; | |
177c0ea7 | 5306 | |
52b852c7 | 5307 | FOR_EACH_BUFFER (b) |
93c27ef1 | 5308 | if (b->text->beg == NULL) |
b86af064 | 5309 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5310 | } |
b86af064 | 5311 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5312 | |
1ab256cb | 5313 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
4b4deea2 | 5314 | if (NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) |
3d871c85 | 5315 | Fset_buffer_multibyte (Qnil); |
2381d133 | 5316 | |
01537133 | 5317 | pwd = get_current_dir_name (); |
a17b5ed1 | 5318 | |
156bdb41 | 5319 | if (!pwd) |
a17b5ed1 | 5320 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); |
1ab256cb | 5321 | |
1ab256cb RM |
5322 | /* Maybe this should really use some standard subroutine |
5323 | whose definition is filename syntax dependent. */ | |
b639c9be RF |
5324 | len = strlen (pwd); |
5325 | if (!(IS_DIRECTORY_SEP (pwd[len - 1]))) | |
f7975d07 | 5326 | { |
156bdb41 | 5327 | /* Grow buffer to add directory separator and '\0'. */ |
38182d90 | 5328 | pwd = realloc (pwd, len + 2); |
8b146312 AS |
5329 | if (!pwd) |
5330 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); | |
b639c9be RF |
5331 | pwd[len] = DIRECTORY_SEP; |
5332 | pwd[len + 1] = '\0'; | |
cb1caeaf | 5333 | len++; |
f7975d07 | 5334 | } |
0995fa35 | 5335 | |
39eb03f1 | 5336 | bset_directory (current_buffer, make_unibyte_string (pwd, len)); |
4b4deea2 | 5337 | if (! NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) |
f9962371 | 5338 | /* At this moment, we still don't know how to decode the |
156bdb41 | 5339 | directory name. So, we keep the bytes in multibyte form so |
dcd74c5f | 5340 | that ENCODE_FILE correctly gets the original bytes. */ |
39eb03f1 PE |
5341 | bset_directory |
5342 | (current_buffer, string_to_multibyte (BVAR (current_buffer, directory))); | |
136351b7 | 5343 | |
0995fa35 RS |
5344 | /* Add /: to the front of the name |
5345 | if it would otherwise be treated as magic. */ | |
4b4deea2 | 5346 | temp = Ffind_file_name_handler (BVAR (current_buffer, directory), Qt); |
81ab2e07 KH |
5347 | if (! NILP (temp) |
5348 | /* If the default dir is just /, TEMP is non-nil | |
5349 | because of the ange-ftp completion handler. | |
5350 | However, it is not necessary to turn / into /:/. | |
5351 | So avoid doing that. */ | |
4b4deea2 | 5352 | && strcmp ("/", SSDATA (BVAR (current_buffer, directory)))) |
39eb03f1 PE |
5353 | bset_directory |
5354 | (current_buffer, | |
5355 | concat2 (build_string ("/:"), BVAR (current_buffer, directory))); | |
0995fa35 | 5356 | |
136351b7 | 5357 | temp = get_minibuffer (0); |
39eb03f1 | 5358 | bset_directory (XBUFFER (temp), BVAR (current_buffer, directory)); |
01537133 EZ |
5359 | |
5360 | free (pwd); | |
1ab256cb RM |
5361 | } |
5362 | ||
58cc0a01 DA |
5363 | /* Similar to defvar_lisp but define a variable whose value is the |
5364 | Lisp_Object stored in the current buffer. LNAME is the Lisp-level | |
5365 | variable name. VNAME is the name of the buffer slot. PREDICATE | |
5366 | is nil for a general Lisp variable. If PREDICATE is non-nil, then | |
5367 | only Lisp values that satisfies the PREDICATE are allowed (except | |
5368 | that nil is allowed too). DOC is a dummy where you write the doc | |
5369 | string as a comment. */ | |
5370 | ||
5371 | #define DEFVAR_PER_BUFFER(lname, vname, predicate, doc) \ | |
5372 | do { \ | |
5373 | static struct Lisp_Buffer_Objfwd bo_fwd; \ | |
5374 | defvar_per_buffer (&bo_fwd, lname, vname, predicate); \ | |
ce5b453a | 5375 | } while (0) |
d6aa1876 SM |
5376 | |
5377 | static void | |
8ea90aa3 | 5378 | defvar_per_buffer (struct Lisp_Buffer_Objfwd *bo_fwd, const char *namestring, |
58cc0a01 | 5379 | Lisp_Object *address, Lisp_Object predicate) |
d6aa1876 | 5380 | { |
ce5b453a | 5381 | struct Lisp_Symbol *sym; |
d6aa1876 SM |
5382 | int offset; |
5383 | ||
ce5b453a | 5384 | sym = XSYMBOL (intern (namestring)); |
d6aa1876 SM |
5385 | offset = (char *)address - (char *)current_buffer; |
5386 | ||
ce5b453a SM |
5387 | bo_fwd->type = Lisp_Fwd_Buffer_Obj; |
5388 | bo_fwd->offset = offset; | |
58cc0a01 | 5389 | bo_fwd->predicate = predicate; |
b9598260 | 5390 | sym->declared_special = 1; |
ce5b453a SM |
5391 | sym->redirect = SYMBOL_FORWARDED; |
5392 | { | |
5393 | /* I tried to do the job without a cast, but it seems impossible. | |
5394 | union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */ | |
5395 | SET_SYMBOL_FWD (sym, (union Lisp_Fwd *)bo_fwd); | |
5396 | } | |
5397 | XSETSYMBOL (PER_BUFFER_SYMBOL (offset), sym); | |
d6aa1876 SM |
5398 | |
5399 | if (PER_BUFFER_IDX (offset) == 0) | |
5400 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding | |
5401 | slot of buffer_local_flags */ | |
1088b922 | 5402 | emacs_abort (); |
d6aa1876 SM |
5403 | } |
5404 | ||
5405 | ||
1ab256cb | 5406 | /* initialize the buffer routines */ |
dfcf069d | 5407 | void |
d3da34e0 | 5408 | syms_of_buffer (void) |
1ab256cb | 5409 | { |
9115729e KH |
5410 | staticpro (&last_overlay_modification_hooks); |
5411 | last_overlay_modification_hooks | |
5412 | = Fmake_vector (make_number (10), Qnil); | |
5413 | ||
1ab256cb RM |
5414 | staticpro (&Qfundamental_mode); |
5415 | staticpro (&Qmode_class); | |
5416 | staticpro (&QSFundamental); | |
5417 | staticpro (&Vbuffer_alist); | |
5418 | staticpro (&Qprotected_field); | |
5419 | staticpro (&Qpermanent_local); | |
5420 | staticpro (&Qkill_buffer_hook); | |
cd3520a4 JB |
5421 | |
5422 | DEFSYM (Qpermanent_local_hook, "permanent-local-hook"); | |
5423 | DEFSYM (Qoverlayp, "overlayp"); | |
5424 | DEFSYM (Qevaporate, "evaporate"); | |
5425 | DEFSYM (Qmodification_hooks, "modification-hooks"); | |
5426 | DEFSYM (Qinsert_in_front_hooks, "insert-in-front-hooks"); | |
5427 | DEFSYM (Qinsert_behind_hooks, "insert-behind-hooks"); | |
5428 | DEFSYM (Qget_file_buffer, "get-file-buffer"); | |
5429 | DEFSYM (Qpriority, "priority"); | |
5430 | DEFSYM (Qbefore_string, "before-string"); | |
5431 | DEFSYM (Qafter_string, "after-string"); | |
5432 | DEFSYM (Qfirst_change_hook, "first-change-hook"); | |
5433 | DEFSYM (Qbefore_change_functions, "before-change-functions"); | |
5434 | DEFSYM (Qafter_change_functions, "after-change-functions"); | |
5435 | DEFSYM (Qkill_buffer_query_functions, "kill-buffer-query-functions"); | |
5436 | ||
1ab256cb | 5437 | Fput (Qprotected_field, Qerror_conditions, |
3438fe21 | 5438 | listn (CONSTYPE_PURE, 2, Qprotected_field, Qerror)); |
1ab256cb | 5439 | Fput (Qprotected_field, Qerror_message, |
2a0213a6 | 5440 | build_pure_c_string ("Attempt to modify a protected field")); |
1ab256cb | 5441 | |
422745d0 TT |
5442 | DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format", |
5443 | mode_line_format, | |
5444 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5445 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5446 | |
422745d0 TT |
5447 | DEFVAR_BUFFER_DEFAULTS ("default-header-line-format", |
5448 | header_line_format, | |
5449 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5450 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5451 | |
422745d0 TT |
5452 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type, |
5453 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5454 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5455 | |
422745d0 TT |
5456 | DEFVAR_BUFFER_DEFAULTS ("default-line-spacing", |
5457 | extra_line_spacing, | |
5458 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5459 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5460 | |
422745d0 TT |
5461 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows", |
5462 | cursor_in_non_selected_windows, | |
5463 | doc: /* Default value of `cursor-in-non-selected-windows'. | |
187ccf49 KS |
5464 | This is the same as (default-value 'cursor-in-non-selected-windows). */); |
5465 | ||
422745d0 TT |
5466 | DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode", |
5467 | abbrev_mode, | |
5468 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. | |
018ba359 | 5469 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb | 5470 | |
422745d0 TT |
5471 | DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow", |
5472 | ctl_arrow, | |
5473 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. | |
018ba359 | 5474 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5475 | |
422745d0 TT |
5476 | DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters", |
5477 | enable_multibyte_characters, | |
fb7ada5f | 5478 | doc: /* Default value of `enable-multibyte-characters' for buffers not overriding it. |
018ba359 | 5479 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5480 | |
422745d0 TT |
5481 | DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system", |
5482 | buffer_file_coding_system, | |
5483 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. | |
018ba359 | 5484 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5485 | |
422745d0 TT |
5486 | DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines", |
5487 | truncate_lines, | |
5488 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5489 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb | 5490 | |
422745d0 TT |
5491 | DEFVAR_BUFFER_DEFAULTS ("default-fill-column", |
5492 | fill_column, | |
5493 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5494 | This is the same as (default-value 'fill-column). */); |
1ab256cb | 5495 | |
422745d0 TT |
5496 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin", |
5497 | left_margin, | |
5498 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5499 | This is the same as (default-value 'left-margin). */); |
1ab256cb | 5500 | |
422745d0 TT |
5501 | DEFVAR_BUFFER_DEFAULTS ("default-tab-width", |
5502 | tab_width, | |
5503 | doc: /* Default value of `tab-width' for buffers that do not override it. | |
018ba359 | 5504 | This is the same as (default-value 'tab-width). */); |
1ab256cb | 5505 | |
422745d0 TT |
5506 | DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search", |
5507 | case_fold_search, | |
5508 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5509 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5510 | |
422745d0 TT |
5511 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width", |
5512 | left_margin_cols, | |
5513 | doc: /* Default value of `left-margin-width' for buffers that don't override it. | |
018ba359 | 5514 | This is the same as (default-value 'left-margin-width). */); |
0552666b | 5515 | |
422745d0 TT |
5516 | DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width", |
5517 | right_margin_cols, | |
5518 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5519 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5520 | |
422745d0 TT |
5521 | DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width", |
5522 | left_fringe_width, | |
5523 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5524 | This is the same as (default-value 'left-fringe-width). */); |
5525 | ||
422745d0 TT |
5526 | DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width", |
5527 | right_fringe_width, | |
5528 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5529 | This is the same as (default-value 'right-fringe-width). */); |
5530 | ||
422745d0 TT |
5531 | DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins", |
5532 | fringes_outside_margins, | |
5533 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
2ad8731a KS |
5534 | This is the same as (default-value 'fringes-outside-margins). */); |
5535 | ||
422745d0 TT |
5536 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width", |
5537 | scroll_bar_width, | |
5538 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
2ad8731a KS |
5539 | This is the same as (default-value 'scroll-bar-width). */); |
5540 | ||
422745d0 TT |
5541 | DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar", |
5542 | vertical_scroll_bar_type, | |
5543 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
2ad8731a KS |
5544 | This is the same as (default-value 'vertical-scroll-bar). */); |
5545 | ||
422745d0 TT |
5546 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines", |
5547 | indicate_empty_lines, | |
5548 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5549 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5550 | |
422745d0 TT |
5551 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries", |
5552 | indicate_buffer_boundaries, | |
5553 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
6b61353c KH |
5554 | This is the same as (default-value 'indicate-buffer-boundaries). */); |
5555 | ||
422745d0 TT |
5556 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist", |
5557 | fringe_indicator_alist, | |
5558 | doc: /* Default value of `fringe-indicator-alist' for buffers that don't override it. | |
c6a46372 KS |
5559 | This is the same as (default-value 'fringe-indicator-alist'). */); |
5560 | ||
422745d0 TT |
5561 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist", |
5562 | fringe_cursor_alist, | |
5563 | doc: /* Default value of `fringe-cursor-alist' for buffers that don't override it. | |
c6a46372 KS |
5564 | This is the same as (default-value 'fringe-cursor-alist'). */); |
5565 | ||
422745d0 TT |
5566 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively", |
5567 | scroll_up_aggressively, | |
5568 | doc: /* Default value of `scroll-up-aggressively'. | |
7614d762 | 5569 | This value applies in buffers that don't have their own local values. |
fc961256 | 5570 | This is the same as (default-value 'scroll-up-aggressively). */); |
177c0ea7 | 5571 | |
422745d0 TT |
5572 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively", |
5573 | scroll_down_aggressively, | |
5574 | doc: /* Default value of `scroll-down-aggressively'. | |
7614d762 | 5575 | This value applies in buffers that don't have their own local values. |
fc961256 | 5576 | This is the same as (default-value 'scroll-down-aggressively). */); |
177c0ea7 | 5577 | |
045dee35 | 5578 | DEFVAR_PER_BUFFER ("header-line-format", |
4b4deea2 | 5579 | &BVAR (current_buffer, header_line_format), |
7ee72033 | 5580 | Qnil, |
7614d762 RS |
5581 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5582 | The header line appears, optionally, at the top of a window; | |
5583 | the mode line appears at the bottom. */); | |
177c0ea7 | 5584 | |
4b4deea2 | 5585 | DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer, mode_line_format), |
efc7e75f PJ |
5586 | Qnil, |
5587 | doc: /* Template for displaying mode line for current buffer. | |
5f2c76c6 CY |
5588 | |
5589 | The value may be nil, a string, a symbol or a list. | |
5590 | ||
018ba359 | 5591 | A value of nil means don't display a mode line. |
5f2c76c6 CY |
5592 | |
5593 | For any symbol other than t or nil, the symbol's value is processed as | |
5594 | a mode line construct. As a special exception, if that value is a | |
5595 | string, the string is processed verbatim, without handling any | |
5596 | %-constructs (see below). Also, unless the symbol has a non-nil | |
5597 | `risky-local-variable' property, all properties in any strings, as | |
5598 | well as all :eval and :propertize forms in the value, are ignored. | |
5599 | ||
5600 | A list whose car is a string or list is processed by processing each | |
5601 | of the list elements recursively, as separate mode line constructs, | |
5602 | and concatenating the results. | |
5603 | ||
5604 | A list of the form `(:eval FORM)' is processed by evaluating FORM and | |
5605 | using the result as a mode line construct. Be careful--FORM should | |
5606 | not load any files, because that can cause an infinite recursion. | |
5607 | ||
5608 | A list of the form `(:propertize ELT PROPS...)' is processed by | |
5609 | processing ELT as the mode line construct, and adding the text | |
5610 | properties PROPS to the result. | |
5611 | ||
5612 | A list whose car is a symbol is processed by examining the symbol's | |
5613 | value, and, if that value is non-nil, processing the cadr of the list | |
5614 | recursively; and if that value is nil, processing the caddr of the | |
5615 | list recursively. | |
5616 | ||
5617 | A list whose car is an integer is processed by processing the cadr of | |
5618 | the list, and padding (if the number is positive) or truncating (if | |
5619 | negative) to the width specified by that number. | |
5620 | ||
018ba359 | 5621 | A string is printed verbatim in the mode line except for %-constructs: |
018ba359 PJ |
5622 | %b -- print buffer name. %f -- print visited file name. |
5623 | %F -- print frame name. | |
5624 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5625 | %& is like %*, but ignore read-only-ness. | |
5626 | % means buffer is read-only and * means it is modified. | |
5627 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5628 | %s -- print process status. %l -- print the current line number. | |
5629 | %c -- print the current column number (this makes editing slower). | |
5630 | To make the column number update correctly in all cases, | |
5631 | `column-number-mode' must be non-nil. | |
6b61353c KH |
5632 | %i -- print the size of the buffer. |
5633 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5634 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5635 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5636 | or print Bottom or All. | |
018ba359 | 5637 | %n -- print Narrow if appropriate. |
dafbe726 | 5638 | %t -- visited file is text or binary (if OS supports this distinction). |
47419860 | 5639 | %z -- print mnemonics of keyboard, terminal, and buffer coding systems. |
018ba359 | 5640 | %Z -- like %z, but including the end-of-line format. |
dafbe726 | 5641 | %e -- print error message about full memory. |
f7165034 NR |
5642 | %@ -- print @ or hyphen. @ means that default-directory is on a |
5643 | remote machine. | |
018ba359 PJ |
5644 | %[ -- print one [ for each recursive editing level. %] similar. |
5645 | %% -- print %. %- -- print infinitely many dashes. | |
5646 | Decimal digits after the % specify field width to which to pad. */); | |
5647 | ||
422745d0 | 5648 | DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode, |
fb7ada5f | 5649 | doc: /* Value of `major-mode' for new buffers. */); |
1ab256cb | 5650 | |
4b4deea2 | 5651 | DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer, major_mode), |
58cc0a01 | 5652 | Qsymbolp, |
5a021dd0 GM |
5653 | doc: /* Symbol for current buffer's major mode. |
5654 | The default value (normally `fundamental-mode') affects new buffers. | |
5655 | A value of nil means to use the current buffer's major mode, provided | |
5656 | it is not marked as "special". | |
5657 | ||
5658 | When a mode is used by default, `find-file' switches to it before it | |
5659 | reads the contents into the buffer and before it finishes setting up | |
5660 | the buffer. Thus, the mode and its hooks should not expect certain | |
5661 | variables such as `buffer-read-only' and `buffer-file-coding-system' | |
5662 | to be set up. */); | |
1ab256cb | 5663 | |
4b4deea2 | 5664 | DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer, mode_name), |
c01d0677 | 5665 | Qnil, |
64a7c220 | 5666 | doc: /* Pretty name of current buffer's major mode. |
7cb70974 EZ |
5667 | Usually a string, but can use any of the constructs for `mode-line-format', |
5668 | which see. | |
5669 | Format with `format-mode-line' to produce a string value. */); | |
1ab256cb | 5670 | |
4b4deea2 | 5671 | DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer, abbrev_table), Qnil, |
d6aa1876 SM |
5672 | doc: /* Local (mode-specific) abbrev table of current buffer. */); |
5673 | ||
4b4deea2 | 5674 | DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer, abbrev_mode), Qnil, |
9d794026 GM |
5675 | doc: /* Non-nil if Abbrev mode is enabled. |
5676 | Use the command `abbrev-mode' to change this variable. */); | |
1ab256cb | 5677 | |
4b4deea2 | 5678 | DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer, case_fold_search), |
7ee72033 | 5679 | Qnil, |
fb7ada5f | 5680 | doc: /* Non-nil if searches and matches should ignore case. */); |
1ab256cb | 5681 | |
4b4deea2 | 5682 | DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer, fill_column), |
58cc0a01 | 5683 | Qintegerp, |
fb7ada5f | 5684 | doc: /* Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5685 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb | 5686 | |
4b4deea2 | 5687 | DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer, left_margin), |
58cc0a01 | 5688 | Qintegerp, |
fb7ada5f | 5689 | doc: /* Column for the default `indent-line-function' to indent to. |
018ba359 | 5690 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb | 5691 | |
4b4deea2 | 5692 | DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer, tab_width), |
58cc0a01 | 5693 | Qintegerp, |
fb7ada5f | 5694 | doc: /* Distance between tab stops (for display of tab characters), in columns. |
fde4eb86 | 5695 | This should be an integer greater than zero. */); |
1ab256cb | 5696 | |
4b4deea2 | 5697 | DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer, ctl_arrow), Qnil, |
fb7ada5f | 5698 | doc: /* Non-nil means display control chars with uparrow. |
018ba359 PJ |
5699 | A value of nil means use backslash and octal digits. |
5700 | This variable does not apply to characters whose display is specified | |
5701 | in the current display table (if there is one). */); | |
1ab256cb | 5702 | |
3b06f880 | 5703 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
4b4deea2 | 5704 | &BVAR (current_buffer, enable_multibyte_characters), |
a9b9a780 | 5705 | Qnil, |
efc7e75f | 5706 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5707 | Otherwise they are regarded as unibyte. This affects the display, |
5708 | file I/O and the behavior of various editing commands. | |
5709 | ||
5710 | This variable is buffer-local but you cannot set it directly; | |
5711 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
a66cfb1c | 5712 | See also Info node `(elisp)Text Representations'. */); |
d67b4f80 | 5713 | XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5714 | |
c71b5d9b | 5715 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
4b4deea2 | 5716 | &BVAR (current_buffer, buffer_file_coding_system), Qnil, |
efc7e75f | 5717 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5718 | This variable applies to saving the buffer, and also to `write-region' |
5719 | and other functions that use `write-region'. | |
5720 | It does not apply to sending output to subprocesses, however. | |
5721 | ||
5722 | If this is nil, the buffer is saved without any code conversion | |
5723 | unless some coding system is specified in `file-coding-system-alist' | |
5724 | for the buffer file. | |
5725 | ||
31a6cb06 EZ |
5726 | If the text to be saved cannot be encoded as specified by this variable, |
5727 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5728 | ||
018ba359 PJ |
5729 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5730 | ||
5731 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5732 | |
f44e260c | 5733 | DEFVAR_PER_BUFFER ("bidi-display-reordering", |
4b4deea2 | 5734 | &BVAR (current_buffer, bidi_display_reordering), Qnil, |
938efb77 | 5735 | doc: /* Non-nil means reorder bidirectional text for display in the visual order. */); |
3b06f880 | 5736 | |
6c0cf218 | 5737 | DEFVAR_PER_BUFFER ("bidi-paragraph-direction", |
4b4deea2 | 5738 | &BVAR (current_buffer, bidi_paragraph_direction), Qnil, |
fb7ada5f | 5739 | doc: /* If non-nil, forces directionality of text paragraphs in the buffer. |
b4bf28b7 | 5740 | |
b44d9321 EZ |
5741 | If this is nil (the default), the direction of each paragraph is |
5742 | determined by the first strong directional character of its text. | |
5743 | The values of `right-to-left' and `left-to-right' override that. | |
5744 | Any other value is treated as nil. | |
b4bf28b7 | 5745 | |
b44d9321 EZ |
5746 | This variable has no effect unless the buffer's value of |
5747 | \`bidi-display-reordering' is non-nil. */); | |
5748 | ||
4b4deea2 | 5749 | DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer, truncate_lines), Qnil, |
fb7ada5f | 5750 | doc: /* Non-nil means do not display continuation lines. |
7614d762 | 5751 | Instead, give each line of text just one screen line. |
018ba359 PJ |
5752 | |
5753 | Note that this is overridden by the variable | |
5754 | `truncate-partial-width-windows' if that variable is non-nil | |
32bbb17c GM |
5755 | and this buffer is not full-frame width. |
5756 | ||
5757 | Minibuffers set this variable to nil. */); | |
1ab256cb | 5758 | |
4b4deea2 | 5759 | DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer, word_wrap), Qnil, |
fb7ada5f | 5760 | doc: /* Non-nil means to use word-wrapping for continuation lines. |
0858cd02 CY |
5761 | When word-wrapping is on, continuation lines are wrapped at the space |
5762 | or tab character nearest to the right window edge. | |
5763 | If nil, continuation lines are wrapped at the right screen edge. | |
5764 | ||
5765 | This variable has no effect if long lines are truncated (see | |
eb577e27 GM |
5766 | `truncate-lines' and `truncate-partial-width-windows'). If you use |
5767 | word-wrapping, you might want to reduce the value of | |
5768 | `truncate-partial-width-windows', since wrapping can make text readable | |
c5cfcbe0 CY |
5769 | in narrower windows. |
5770 | ||
5771 | Instead of setting this variable directly, most users should use | |
5772 | Visual Line mode . Visual Line mode, when enabled, sets `word-wrap' | |
5773 | to t, and additionally redefines simple editing commands to act on | |
5774 | visual lines rather than logical lines. See the documentation of | |
5775 | `visual-line-mode'. */); | |
0858cd02 | 5776 | |
4b4deea2 | 5777 | DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer, directory), |
58cc0a01 | 5778 | Qstringp, |
efc7e75f | 5779 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5780 | To interactively change the default directory, use command `cd'. */); |
1ab256cb | 5781 | |
4b4deea2 | 5782 | DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer, auto_fill_function), |
7ee72033 | 5783 | Qnil, |
efc7e75f | 5784 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5785 | It is called after self-inserting any character specified in |
5786 | the `auto-fill-chars' table. | |
5787 | NOTE: This variable is not a hook; | |
5788 | its value may not be a list of functions. */); | |
1ab256cb | 5789 | |
4b4deea2 | 5790 | DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer, filename), |
58cc0a01 | 5791 | Qstringp, |
efc7e75f | 5792 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5793 | |
4b4deea2 | 5794 | DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer, file_truename), |
58cc0a01 | 5795 | Qstringp, |
efc7e75f | 5796 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5797 | The truename of a file is calculated by `file-truename' |
5798 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5799 | |
1ab256cb | 5800 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
4b4deea2 | 5801 | &BVAR (current_buffer, auto_save_file_name), |
58cc0a01 | 5802 | Qstringp, |
7614d762 RS |
5803 | doc: /* Name of file for auto-saving current buffer. |
5804 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5805 | |
4b4deea2 | 5806 | DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer, read_only), Qnil, |
efc7e75f | 5807 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5808 | |
4b4deea2 | 5809 | DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer, backed_up), Qnil, |
efc7e75f | 5810 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5811 | Backing up is done before the first time the file is saved. */); |
1ab256cb | 5812 | |
4b4deea2 | 5813 | DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer, save_length), |
58cc0a01 | 5814 | Qintegerp, |
efc7e75f | 5815 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
4be941e3 RS |
5816 | 0 initially. |
5817 | -1 means auto-saving turned off until next real save. | |
5818 | ||
5819 | If you set this to -2, that means don't turn off auto-saving in this buffer | |
5820 | if its text size shrinks. If you use `buffer-swap-text' on a buffer, | |
5821 | you probably should set this to -2 in that buffer. */); | |
1ab256cb | 5822 | |
4b4deea2 | 5823 | DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer, selective_display), |
7ee72033 | 5824 | Qnil, |
7614d762 | 5825 | doc: /* Non-nil enables selective display. |
a66f285a JB |
5826 | An integer N as value means display only lines |
5827 | that start with less than N columns of space. | |
7614d762 RS |
5828 | A value of t means that the character ^M makes itself and |
5829 | all the rest of the line invisible; also, when saving the buffer | |
5830 | in a file, save the ^M as a newline. */); | |
1ab256cb | 5831 | |
1ab256cb | 5832 | DEFVAR_PER_BUFFER ("selective-display-ellipses", |
4b4deea2 | 5833 | &BVAR (current_buffer, selective_display_ellipses), |
7ee72033 | 5834 | Qnil, |
3f676284 | 5835 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb | 5836 | |
4b4deea2 | 5837 | DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer, overwrite_mode), Qnil, |
efc7e75f | 5838 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5839 | The value should be one of `overwrite-mode-textual', |
5840 | `overwrite-mode-binary', or nil. | |
5841 | If it is `overwrite-mode-textual', self-insertion still | |
5842 | inserts at the end of a line, and inserts when point is before a tab, | |
5843 | until the tab is filled in. | |
5844 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5845 | ||
4b4deea2 | 5846 | DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer, display_table), |
7ee72033 | 5847 | Qnil, |
efc7e75f | 5848 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5849 | |
5850 | If this variable is nil, the value of `standard-display-table' is used. | |
5851 | Each window can have its own, overriding display table, see | |
5852 | `set-window-display-table' and `window-display-table'. | |
5853 | ||
5854 | The display table is a char-table created with `make-display-table'. | |
5855 | A char-table is an array indexed by character codes. Normal array | |
5856 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5857 | ||
5858 | Each of the char-table elements control how to display the corresponding | |
5859 | text character: the element at index C in the table says how to display | |
5860 | the character whose code is C. Each element should be a vector of | |
426a9163 JB |
5861 | characters or nil. The value nil means display the character in the |
5862 | default fashion; otherwise, the characters from the vector are delivered | |
5863 | to the screen instead of the original character. | |
018ba359 | 5864 | |
5fd11dc8 | 5865 | For example, (aset buffer-display-table ?X [?Y]) tells Emacs |
adbb3b05 | 5866 | to display a capital Y instead of each X character. |
018ba359 PJ |
5867 | |
5868 | In addition, a char-table has six extra slots to control the display of: | |
5869 | ||
5870 | the end of a truncated screen line (extra-slot 0, a single character); | |
5871 | the end of a continued line (extra-slot 1, a single character); | |
5872 | the escape character used to display character codes in octal | |
5873 | (extra-slot 2, a single character); | |
5874 | the character used as an arrow for control characters (extra-slot 3, | |
5875 | a single character); | |
5876 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5877 | a vector of characters); | |
5878 | the character used to draw the border between side-by-side windows | |
5879 | (extra-slot 5, a single character). | |
5880 | ||
5881 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5882 | |
4b4deea2 | 5883 | DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer, left_margin_cols), |
58cc0a01 | 5884 | Qintegerp, |
fb7ada5f | 5885 | doc: /* Width of left marginal area for display of a buffer. |
018ba359 | 5886 | A value of nil means no marginal area. */); |
177c0ea7 | 5887 | |
4b4deea2 | 5888 | DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer, right_margin_cols), |
58cc0a01 | 5889 | Qintegerp, |
fb7ada5f | 5890 | doc: /* Width of right marginal area for display of a buffer. |
018ba359 | 5891 | A value of nil means no marginal area. */); |
177c0ea7 | 5892 | |
4b4deea2 | 5893 | DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer, left_fringe_width), |
58cc0a01 | 5894 | Qintegerp, |
fb7ada5f | 5895 | doc: /* Width of this buffer's left fringe (in pixels). |
2ad8731a KS |
5896 | A value of 0 means no left fringe is shown in this buffer's window. |
5897 | A value of nil means to use the left fringe width from the window's frame. */); | |
5898 | ||
4b4deea2 | 5899 | DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer, right_fringe_width), |
58cc0a01 | 5900 | Qintegerp, |
fb7ada5f | 5901 | doc: /* Width of this buffer's right fringe (in pixels). |
2ad8731a KS |
5902 | A value of 0 means no right fringe is shown in this buffer's window. |
5903 | A value of nil means to use the right fringe width from the window's frame. */); | |
5904 | ||
4b4deea2 | 5905 | DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer, fringes_outside_margins), |
2ad8731a | 5906 | Qnil, |
fb7ada5f | 5907 | doc: /* Non-nil means to display fringes outside display margins. |
2ad8731a KS |
5908 | A value of nil means to display fringes between margins and buffer text. */); |
5909 | ||
4b4deea2 | 5910 | DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer, scroll_bar_width), |
58cc0a01 | 5911 | Qintegerp, |
fb7ada5f | 5912 | doc: /* Width of this buffer's scroll bars in pixels. |
2ad8731a KS |
5913 | A value of nil means to use the scroll bar width from the window's frame. */); |
5914 | ||
4b4deea2 | 5915 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer, vertical_scroll_bar_type), |
2ad8731a | 5916 | Qnil, |
fb7ada5f | 5917 | doc: /* Position of this buffer's vertical scroll bar. |
7c6b2007 | 5918 | The value takes effect whenever you tell a window to display this buffer; |
188577ce | 5919 | for instance, with `set-window-buffer' or when `display-buffer' displays it. |
7c6b2007 | 5920 | |
fc2c8887 RS |
5921 | A value of `left' or `right' means put the vertical scroll bar at that side |
5922 | of the window; a value of nil means don't show any vertical scroll bars. | |
5923 | A value of t (the default) means do whatever the window's frame specifies. */); | |
2ad8731a | 5924 | |
0552666b | 5925 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
4b4deea2 | 5926 | &BVAR (current_buffer, indicate_empty_lines), Qnil, |
fb7ada5f | 5927 | doc: /* Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5928 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5929 | window-systems. */); | |
177c0ea7 | 5930 | |
6b61353c | 5931 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
4b4deea2 | 5932 | &BVAR (current_buffer, indicate_buffer_boundaries), Qnil, |
fb7ada5f | 5933 | doc: /* Visually indicate buffer boundaries and scrolling. |
6b61353c KH |
5934 | If non-nil, the first and last line of the buffer are marked in the fringe |
5935 | of a window on window-systems with angle bitmaps, or if the window can be | |
5936 | scrolled, the top and bottom line of the window are marked with up and down | |
5937 | arrow bitmaps. | |
b2229037 KS |
5938 | |
5939 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
79e3497d | 5940 | are displayed in the left or right fringe, resp. Any other value |
845a78b4 | 5941 | that doesn't look like an alist means display the angle bitmaps in |
79e3497d | 5942 | the left fringe but no arrows. |
b2229037 | 5943 | |
79e3497d RS |
5944 | You can exercise more precise control by using an alist as the |
5945 | value. Each alist element (INDICATOR . POSITION) specifies | |
5946 | where to show one of the indicators. INDICATOR is one of `top', | |
b2229037 KS |
5947 | `bottom', `up', `down', or t, which specifies the default position, |
5948 | and POSITION is one of `left', `right', or nil, meaning do not show | |
5949 | this indicator. | |
5950 | ||
5951 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
5952 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
6b61353c | 5953 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 5954 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
6b61353c | 5955 | |
c6a46372 | 5956 | DEFVAR_PER_BUFFER ("fringe-indicator-alist", |
4b4deea2 | 5957 | &BVAR (current_buffer, fringe_indicator_alist), Qnil, |
fb7ada5f | 5958 | doc: /* Mapping from logical to physical fringe indicator bitmaps. |
c6a46372 KS |
5959 | The value is an alist where each element (INDICATOR . BITMAPS) |
5960 | specifies the fringe bitmaps used to display a specific logical | |
5961 | fringe indicator. | |
5962 | ||
5963 | INDICATOR specifies the logical indicator type which is one of the | |
5964 | following symbols: `truncation' , `continuation', `overlay-arrow', | |
14fb5704 | 5965 | `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'. |
c6a46372 | 5966 | |
14fb5704 | 5967 | BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies |
c6a46372 KS |
5968 | the actual bitmap shown in the left or right fringe for the logical |
5969 | indicator. LEFT and RIGHT are the bitmaps shown in the left and/or | |
5970 | right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps | |
14fb5704 JB |
5971 | are used only for the `bottom' and `top-bottom' indicators when the |
5972 | last (only) line has no final newline. BITMAPS may also be a single | |
c6a46372 KS |
5973 | symbol which is used in both left and right fringes. */); |
5974 | ||
5975 | DEFVAR_PER_BUFFER ("fringe-cursor-alist", | |
4b4deea2 | 5976 | &BVAR (current_buffer, fringe_cursor_alist), Qnil, |
fb7ada5f | 5977 | doc: /* Mapping from logical to physical fringe cursor bitmaps. |
c6a46372 KS |
5978 | The value is an alist where each element (CURSOR . BITMAP) |
5979 | specifies the fringe bitmaps used to display a specific logical | |
5980 | cursor type in the fringe. | |
5981 | ||
5982 | CURSOR specifies the logical cursor type which is one of the following | |
5983 | symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last | |
5984 | one is used to show a hollow cursor on narrow lines display lines | |
5985 | where the normal hollow cursor will not fit. | |
5986 | ||
5987 | BITMAP is the corresponding fringe bitmap shown for the logical | |
5988 | cursor type. */); | |
5989 | ||
0552666b | 5990 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
58cc0a01 | 5991 | &BVAR (current_buffer, scroll_up_aggressively), Qfloatp, |
4e0692c1 RS |
5992 | doc: /* How far to scroll windows upward. |
5993 | If you move point off the bottom, the window scrolls automatically. | |
426a9163 | 5994 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5995 | means scroll to center point. A fraction means scroll to put point |
5996 | that fraction of the window's height from the bottom of the window. | |
d765e3a3 JB |
5997 | When the value is 0.0, point goes at the bottom line, which in the |
5998 | simple case that you moved off with C-f means scrolling just one line. | |
5999 | 1.0 means point goes at the top, so that in that simple case, the | |
6000 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 6001 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 6002 | |
0552666b | 6003 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
58cc0a01 | 6004 | &BVAR (current_buffer, scroll_down_aggressively), Qfloatp, |
4e0692c1 RS |
6005 | doc: /* How far to scroll windows downward. |
6006 | If you move point off the top, the window scrolls automatically. | |
426a9163 | 6007 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
6008 | means scroll to center point. A fraction means scroll to put point |
6009 | that fraction of the window's height from the top of the window. | |
d765e3a3 JB |
6010 | When the value is 0.0, point goes at the top line, which in the |
6011 | simple case that you moved off with C-b means scrolling just one line. | |
6012 | 1.0 means point goes at the bottom, so that in that simple case, the | |
6013 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 6014 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 6015 | |
29208e82 | 6016 | DEFVAR_LISP ("before-change-functions", Vbefore_change_functions, |
7ee72033 | 6017 | doc: /* List of functions to call before each text change. |
018ba359 PJ |
6018 | Two arguments are passed to each function: the positions of |
6019 | the beginning and end of the range of old text to be changed. | |
6020 | \(For an insertion, the beginning and end are at the same place.) | |
6021 | No information is given about the length of the text after the change. | |
6022 | ||
6023 | Buffer changes made while executing the `before-change-functions' | |
6024 | don't call any before-change or after-change functions. | |
7b2bf907 | 6025 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
6026 | |
6027 | If an unhandled error happens in running these functions, | |
6028 | the variable's value remains nil. That prevents the error | |
6029 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
6030 | Vbefore_change_functions = Qnil; |
6031 | ||
29208e82 | 6032 | DEFVAR_LISP ("after-change-functions", Vafter_change_functions, |
eacdfade | 6033 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
6034 | Three arguments are passed to each function: the positions of |
6035 | the beginning and end of the range of changed text, | |
6036 | and the length in bytes of the pre-change text replaced by that range. | |
6037 | \(For an insertion, the pre-change length is zero; | |
6038 | for a deletion, that length is the number of bytes deleted, | |
6039 | and the post-change beginning and end are at the same place.) | |
6040 | ||
6041 | Buffer changes made while executing the `after-change-functions' | |
6042 | don't call any before-change or after-change functions. | |
7b2bf907 | 6043 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
6044 | |
6045 | If an unhandled error happens in running these functions, | |
6046 | the variable's value remains nil. That prevents the error | |
6047 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
6048 | Vafter_change_functions = Qnil; |
6049 | ||
29208e82 | 6050 | DEFVAR_LISP ("first-change-hook", Vfirst_change_hook, |
efc7e75f | 6051 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 6052 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 6053 | Vfirst_change_hook = Qnil; |
1ab256cb | 6054 | |
4b4deea2 | 6055 | DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer, undo_list), Qnil, |
7ee72033 | 6056 | doc: /* List of undo entries in current buffer. |
018ba359 PJ |
6057 | Recent changes come first; older changes follow newer. |
6058 | ||
6059 | An entry (BEG . END) represents an insertion which begins at | |
6060 | position BEG and ends at position END. | |
6061 | ||
6062 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
6063 | from (abs POSITION). If POSITION is positive, point was at the front | |
6064 | of the text being deleted; if negative, point was at the end. | |
6065 | ||
d35af63c PE |
6066 | An entry (t HIGH LOW USEC PSEC) indicates that the buffer was previously |
6067 | unmodified; (HIGH LOW USEC PSEC) is in the same style as (current-time) | |
6068 | and is the visited file's modification time, as of that time. If the | |
018ba359 PJ |
6069 | modification time of the most recent save is different, this entry is |
6070 | obsolete. | |
6071 | ||
6072 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
6073 | was modified between BEG and END. PROPERTY is the property name, | |
6074 | and VALUE is the old value. | |
6075 | ||
7405f386 KS |
6076 | An entry (apply FUN-NAME . ARGS) means undo the change with |
6077 | \(apply FUN-NAME ARGS). | |
6078 | ||
6079 | An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo | |
6080 | in the active region. BEG and END is the range affected by this entry | |
6081 | and DELTA is the number of bytes added or deleted in that range by | |
6082 | this change. | |
c6c7dc03 | 6083 | |
018ba359 PJ |
6084 | An entry (MARKER . DISTANCE) indicates that the marker MARKER |
6085 | was adjusted in position by the offset DISTANCE (an integer). | |
6086 | ||
6087 | An entry of the form POSITION indicates that point was at the buffer | |
6088 | location given by the integer. Undoing an entry of this form places | |
6089 | point at POSITION. | |
6090 | ||
b4c4f2f4 JB |
6091 | Entries with value `nil' mark undo boundaries. The undo command treats |
6092 | the changes between two undo boundaries as a single step to be undone. | |
018ba359 PJ |
6093 | |
6094 | If the value of the variable is t, undo information is not recorded. */); | |
6095 | ||
4b4deea2 | 6096 | DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer, mark_active), Qnil, |
7ee72033 | 6097 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); |
018ba359 | 6098 | |
4b4deea2 | 6099 | DEFVAR_PER_BUFFER ("cache-long-line-scans", &BVAR (current_buffer, cache_long_line_scans), Qnil, |
7ee72033 | 6100 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. |
018ba359 PJ |
6101 | |
6102 | Normally, the line-motion functions work by scanning the buffer for | |
5629f29b DK |
6103 | newlines. Columnar operations (like `move-to-column' and |
6104 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
6105 | widths as they go. This works well for ordinary text, but if the |
6106 | buffer's lines are very long (say, more than 500 characters), these | |
6107 | motion functions will take longer to execute. Emacs may also take | |
6108 | longer to update the display. | |
6109 | ||
5629f29b | 6110 | If `cache-long-line-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
6111 | results of their scans, and consult the cache to avoid rescanning |
6112 | regions of the buffer until the text is modified. The caches are most | |
6113 | beneficial when they prevent the most searching---that is, when the | |
6114 | buffer contains long lines and large regions of characters with the | |
6115 | same, fixed screen width. | |
6116 | ||
5629f29b | 6117 | When `cache-long-line-scans' is non-nil, processing short lines will |
018ba359 PJ |
6118 | become slightly slower (because of the overhead of consulting the |
6119 | cache), and the caches will use memory roughly proportional to the | |
6120 | number of newlines and characters whose screen width varies. | |
6121 | ||
6122 | The caches require no explicit maintenance; their accuracy is | |
6123 | maintained internally by the Emacs primitives. Enabling or disabling | |
6124 | the cache should not affect the behavior of any of the motion | |
6125 | functions; it should only affect their performance. */); | |
6126 | ||
4b4deea2 | 6127 | DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer, point_before_scroll), Qnil, |
7ee72033 | 6128 | doc: /* Value of point before the last series of scroll operations, or nil. */); |
018ba359 | 6129 | |
4b4deea2 | 6130 | DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer, file_format), Qnil, |
7ee72033 | 6131 | doc: /* List of formats to use when saving this buffer. |
018ba359 | 6132 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 6133 | set when a file is visited. */); |
be9aafdd | 6134 | |
71ed49fa | 6135 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
4b4deea2 | 6136 | &BVAR (current_buffer, auto_save_file_format), Qnil, |
fb7ada5f | 6137 | doc: /* Format in which to write auto-save files. |
71ed49fa LT |
6138 | Should be a list of symbols naming formats that are defined in `format-alist'. |
6139 | If it is t, which is the default, auto-save files are written in the | |
6140 | same format as a regular save would use. */); | |
6141 | ||
3cb719bd | 6142 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
4b4deea2 | 6143 | &BVAR (current_buffer, invisibility_spec), Qnil, |
7ee72033 | 6144 | doc: /* Invisibility spec of this buffer. |
018ba359 PJ |
6145 | The default is t, which means that text is invisible |
6146 | if it has a non-nil `invisible' property. | |
6147 | If the value is a list, a text character is invisible if its `invisible' | |
b49dd850 | 6148 | property is an element in that list (or is a list with members in common). |
018ba359 PJ |
6149 | If an element is a cons cell of the form (PROP . ELLIPSIS), |
6150 | then characters with property value PROP are invisible, | |
6151 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 6152 | |
7962a441 | 6153 | DEFVAR_PER_BUFFER ("buffer-display-count", |
58cc0a01 | 6154 | &BVAR (current_buffer, display_count), Qintegerp, |
7ee72033 | 6155 | doc: /* A number incremented each time this buffer is displayed in a window. |
018ba359 | 6156 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
6157 | |
6158 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
4b4deea2 | 6159 | &BVAR (current_buffer, display_time), Qnil, |
7ee72033 | 6160 | doc: /* Time stamp updated each time this buffer is displayed in a window. |
018ba359 PJ |
6161 | The function `set-window-buffer' updates this variable |
6162 | to the value obtained by calling `current-time'. | |
6163 | If the buffer has never been shown in a window, the value is nil. */); | |
6164 | ||
29208e82 | 6165 | DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode, |
9d794026 GM |
6166 | doc: /* Non-nil if Transient Mark mode is enabled. |
6167 | See the command `transient-mark-mode' for a description of this minor mode. | |
6168 | ||
6169 | Non-nil also enables highlighting of the region whenever the mark is active. | |
6170 | The variable `highlight-nonselected-windows' controls whether to highlight | |
6171 | all windows or just the selected window. | |
6172 | ||
f49d1f52 | 6173 | Lisp programs may give this variable certain special values: |
9d794026 | 6174 | |
f49d1f52 SM |
6175 | - A value of `lambda' enables Transient Mark mode temporarily. |
6176 | It is disabled again after any subsequent action that would | |
6177 | normally deactivate the mark (e.g. buffer modification). | |
6178 | ||
6179 | - A value of (only . OLDVAL) enables Transient Mark mode | |
6180 | temporarily. After any subsequent point motion command that is | |
6181 | not shift-translated, or any other action that would normally | |
6182 | deactivate the mark (e.g. buffer modification), the value of | |
6183 | `transient-mark-mode' is set to OLDVAL. */); | |
c48f61ef RS |
6184 | Vtransient_mark_mode = Qnil; |
6185 | ||
29208e82 | 6186 | DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only, |
fb7ada5f | 6187 | doc: /* Non-nil means disregard read-only status of buffers or characters. |
018ba359 PJ |
6188 | If the value is t, disregard `buffer-read-only' and all `read-only' |
6189 | text properties. If the value is a list, disregard `buffer-read-only' | |
6190 | and disregard a `read-only' text property if the property value | |
6191 | is a member of the list. */); | |
a96b68f1 RS |
6192 | Vinhibit_read_only = Qnil; |
6193 | ||
4b4deea2 | 6194 | DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer, cursor_type), Qnil, |
f6e22881 | 6195 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
6196 | Values are interpreted as follows: |
6197 | ||
0f7b074f CY |
6198 | t use the cursor specified for the frame |
6199 | nil don't display a cursor | |
6200 | box display a filled box cursor | |
6201 | hollow display a hollow box cursor | |
6202 | bar display a vertical bar cursor with default width | |
6203 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
6204 | hbar display a horizontal bar cursor with default height | |
b4234f4c | 6205 | (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT |
0f7b074f | 6206 | ANYTHING ELSE display a hollow box cursor |
cd8d5236 | 6207 | |
e08b1705 MR |
6208 | When the buffer is displayed in a non-selected window, the |
6209 | cursor's appearance is instead controlled by the variable | |
6210 | `cursor-in-non-selected-windows'. */); | |
bb2ec976 | 6211 | |
a3bbced0 | 6212 | DEFVAR_PER_BUFFER ("line-spacing", |
58cc0a01 | 6213 | &BVAR (current_buffer, extra_line_spacing), Qnumberp, |
7ee72033 | 6214 | doc: /* Additional space to put between lines when displaying a buffer. |
3ba010e5 EZ |
6215 | The space is measured in pixels, and put below lines on graphic displays, |
6216 | see `display-graphic-p'. | |
60ebfdf3 | 6217 | If value is a floating point number, it specifies the spacing relative |
fc961256 | 6218 | to the default frame line height. A value of nil means add no extra space. */); |
a3bbced0 | 6219 | |
0124c5bd | 6220 | DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows", |
4b4deea2 | 6221 | &BVAR (current_buffer, cursor_in_non_selected_windows), Qnil, |
fb7ada5f | 6222 | doc: /* Non-nil means show a cursor in non-selected windows. |
66c6abf0 GM |
6223 | If nil, only shows a cursor in the selected window. |
6224 | If t, displays a cursor related to the usual cursor type | |
6225 | \(a solid box becomes hollow, a bar becomes a narrower bar). | |
6226 | You can also specify the cursor type as in the `cursor-type' variable. | |
6227 | Use Custom to set this variable and update the display." */); | |
0124c5bd | 6228 | |
29208e82 | 6229 | DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions, |
f6e22881 JB |
6230 | doc: /* List of functions called with no args to query before killing a buffer. |
6231 | The buffer being killed will be current while the functions are running. | |
b7e8d081 MR |
6232 | |
6233 | If any of them returns nil, the buffer is not killed. Functions run by | |
6234 | this hook are supposed to not change the current buffer. */); | |
dcdffbf6 RS |
6235 | Vkill_buffer_query_functions = Qnil; |
6236 | ||
29208e82 | 6237 | DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook, |
43ed3b8d CY |
6238 | doc: /* Normal hook run before changing the major mode of a buffer. |
6239 | The function `kill-all-local-variables' runs this before doing anything else. */); | |
6240 | Vchange_major_mode_hook = Qnil; | |
cd3520a4 | 6241 | DEFSYM (Qchange_major_mode_hook, "change-major-mode-hook"); |
43ed3b8d | 6242 | |
9397e56f MR |
6243 | DEFVAR_LISP ("buffer-list-update-hook", Vbuffer_list_update_hook, |
6244 | doc: /* Hook run when the buffer list changes. | |
6245 | Functions running this hook are `get-buffer-create', | |
6246 | `make-indirect-buffer', `rename-buffer', `kill-buffer', | |
96a72ee9 | 6247 | and `bury-buffer-internal'. */); |
9397e56f | 6248 | Vbuffer_list_update_hook = Qnil; |
cd3520a4 | 6249 | DEFSYM (Qbuffer_list_update_hook, "buffer-list-update-hook"); |
9397e56f | 6250 | |
0dc88e60 | 6251 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
6252 | defsubr (&Sbuffer_list); |
6253 | defsubr (&Sget_buffer); | |
6254 | defsubr (&Sget_file_buffer); | |
6255 | defsubr (&Sget_buffer_create); | |
336cd056 | 6256 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 6257 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb | 6258 | defsubr (&Sbuffer_name); |
1ab256cb | 6259 | defsubr (&Sbuffer_file_name); |
336cd056 | 6260 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 6261 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
6262 | defsubr (&Sbuffer_local_variables); |
6263 | defsubr (&Sbuffer_modified_p); | |
6264 | defsubr (&Sset_buffer_modified_p); | |
6265 | defsubr (&Sbuffer_modified_tick); | |
3e145152 | 6266 | defsubr (&Sbuffer_chars_modified_tick); |
1ab256cb RM |
6267 | defsubr (&Srename_buffer); |
6268 | defsubr (&Sother_buffer); | |
1ab256cb RM |
6269 | defsubr (&Sbuffer_enable_undo); |
6270 | defsubr (&Skill_buffer); | |
e4ed06f1 | 6271 | defsubr (&Sbury_buffer_internal); |
a9ee7a59 | 6272 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
6273 | defsubr (&Scurrent_buffer); |
6274 | defsubr (&Sset_buffer); | |
6275 | defsubr (&Sbarf_if_buffer_read_only); | |
3ac81adb | 6276 | defsubr (&Serase_buffer); |
13cda5f9 | 6277 | defsubr (&Sbuffer_swap_text); |
3ac81adb | 6278 | defsubr (&Sset_buffer_multibyte); |
1ab256cb | 6279 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 6280 | |
52f8ec73 | 6281 | defsubr (&Soverlayp); |
2eec3b4e RS |
6282 | defsubr (&Smake_overlay); |
6283 | defsubr (&Sdelete_overlay); | |
c5e28e39 | 6284 | defsubr (&Sdelete_all_overlays); |
2eec3b4e | 6285 | defsubr (&Smove_overlay); |
8ebafa8d JB |
6286 | defsubr (&Soverlay_start); |
6287 | defsubr (&Soverlay_end); | |
6288 | defsubr (&Soverlay_buffer); | |
6289 | defsubr (&Soverlay_properties); | |
2eec3b4e | 6290 | defsubr (&Soverlays_at); |
74514898 | 6291 | defsubr (&Soverlays_in); |
2eec3b4e | 6292 | defsubr (&Snext_overlay_change); |
239c932b | 6293 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
6294 | defsubr (&Soverlay_recenter); |
6295 | defsubr (&Soverlay_lists); | |
6296 | defsubr (&Soverlay_get); | |
6297 | defsubr (&Soverlay_put); | |
a8c21b48 | 6298 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
6299 | } |
6300 | ||
dfcf069d | 6301 | void |
d3da34e0 | 6302 | keys_of_buffer (void) |
1ab256cb RM |
6303 | { |
6304 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
6305 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
6306 | |
6307 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
6308 | initialized when that function gets called. */ | |
d67b4f80 | 6309 | Fput (intern_c_string ("erase-buffer"), Qdisabled, Qt); |
1ab256cb | 6310 | } |